drivers/scsi/qla2xxx/qla_target.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   4  *
   5  *  based on qla2x00t.c code:
   6  *
   7  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   8  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   9  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
  10  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  11  *
  12  *  Forward port and refactoring to modern qla2xxx and target/configfs
  13  *
  14  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/blkdev.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/pci.h>
  23 #include <linux/delay.h>
  24 #include <linux/list.h>
  25 #include <linux/workqueue.h>
  26 #include <asm/unaligned.h>
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30 #include <target/target_core_base.h>
  31 #include <target/target_core_fabric.h>
  32
  33 #include "qla_def.h"
  34 #include "qla_target.h"
  35
  36 static int ql2xtgt_tape_enable;
  37 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  38 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  39                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  40
  41 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  42 module_param(qlini_mode, charp, S_IRUGO);
  43 MODULE_PARM_DESC(qlini_mode,
  44         "Determines when initiator mode will be enabled. Possible values: "
  45         "\"exclusive\" - initiator mode will be enabled on load, "
  46         "disabled on enabling target mode and then on disabling target mode "
  47         "enabled back; "
  48         "\"disabled\" - initiator mode will never be enabled; "
  49         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  50         "when ready "
  51         "\"enabled\" (default) - initiator mode will always stay enabled.");
  52
  53 static int ql_dm_tgt_ex_pct = 0;
  54 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  55 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  56         "For Dual Mode (qlini_mode=dual), this parameter determines "
  57         "the percentage of exchanges/cmds FW will allocate resources "
  58         "for Target mode.");
  59
  60 int ql2xuctrlirq = 1;
  61 module_param(ql2xuctrlirq, int, 0644);
  62 MODULE_PARM_DESC(ql2xuctrlirq,
  63     "User to control IRQ placement via smp_affinity."
  64     "Valid with qlini_mode=disabled."
  65     "1(default): enable");
  66
  67 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  68
  69 static int qla_sam_status = SAM_STAT_BUSY;
  70 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  71
  72 /*
  73  * From scsi/fc/fc_fcp.h
  74  */
  75 enum fcp_resp_rsp_codes {
  76         FCP_TMF_CMPL = 0,
  77         FCP_DATA_LEN_INVALID = 1,
  78         FCP_CMND_FIELDS_INVALID = 2,
  79         FCP_DATA_PARAM_MISMATCH = 3,
  80         FCP_TMF_REJECTED = 4,
  81         FCP_TMF_FAILED = 5,
  82         FCP_TMF_INVALID_LUN = 9,
  83 };
  84
  85 /*
  86  * fc_pri_ta from scsi/fc/fc_fcp.h
  87  */
  88 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  89 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  90 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  91 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  92 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  93 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  94 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  95
  96 /*
  97  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  98  * must be called under HW lock and could unlock/lock it inside.
  99  * It isn't an issue, since in the current implementation on the time when
 100  * those functions are called:
 101  *
 102  *   - Either context is IRQ and only IRQ handler can modify HW data,
 103  *     including rings related fields,
 104  *
 105  *   - Or access to target mode variables from struct qla_tgt doesn't
 106  *     cross those functions boundaries, except tgt_stop, which
 107  *     additionally protected by irq_cmd_count.
 108  */
 109 /* Predefs for callbacks handed to qla2xxx LLD */
 110 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 111         struct atio_from_isp *pkt, uint8_t);
 112 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 113         response_t *pkt);
 114 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 115         int fn, void *iocb, int flags);
 116 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 117         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 118 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 119         struct atio_from_isp *atio, uint16_t status, int qfull);
 120 static void qlt_disable_vha(struct scsi_qla_host *vha);
 121 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 122 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 123         struct imm_ntfy_from_isp *ntfy,
 124         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 125         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 126 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 127         struct imm_ntfy_from_isp *imm, int ha_locked);
 128 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 129         fc_port_t *fcport, bool local);
 130 void qlt_unreg_sess(struct fc_port *sess);
 131 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 132         struct abts_recv_from_24xx *);
 133 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 134     uint16_t);
 135 static int qlt_check_reserve_free_req(struct qla_qpair *qpair, uint32_t);
 136 static inline uint32_t qlt_make_handle(struct qla_qpair *);
 137
 138 /*
 139  * Global Variables
 140  */
 141 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 142 struct kmem_cache *qla_tgt_plogi_cachep;
 143 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 144 static struct workqueue_struct *qla_tgt_wq;
 145 static DEFINE_MUTEX(qla_tgt_mutex);
 146 static LIST_HEAD(qla_tgt_glist);
 147
 148 static const char *prot_op_str(u32 prot_op)
 149 {
 150         switch (prot_op) {
 151         case TARGET_PROT_NORMAL:        return "NORMAL";
 152         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 153         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 154         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 155         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 156         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 157         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 158         default:                        return "UNKNOWN";
 159         }
 160 }
 161
 162 /* This API intentionally takes dest as a parameter, rather than returning
 163  * int value to avoid caller forgetting to issue wmb() after the store */
 164 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 165 {
 166         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 167         *dest = atomic_inc_return(&base_vha->generation_tick);
 168         /* memory barrier */
 169         wmb();
 170 }
 171
 172 /* Might release hw lock, then reaquire!! */
 173 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 174 {
 175         /* Send marker if required */
 176         if (unlikely(vha->marker_needed != 0)) {
 177                 int rc = qla2x00_issue_marker(vha, vha_locked);
 178
 179                 if (rc != QLA_SUCCESS) {
 180                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 181                             "qla_target(%d): issue_marker() failed\n",
 182                             vha->vp_idx);
 183                 }
 184                 return rc;
 185         }
 186         return QLA_SUCCESS;
 187 }
 188
 189 static inline
 190 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 191         uint8_t *d_id)
 192 {
 193         struct scsi_qla_host *host;
 194         uint32_t key = 0;
 195
 196         if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
 197             (vha->d_id.b.al_pa == d_id[2]))
 198                 return vha;
 199
 200         key  = (uint32_t)d_id[0] << 16;
 201         key |= (uint32_t)d_id[1] <<  8;
 202         key |= (uint32_t)d_id[2];
 203
 204         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 205         if (!host)
 206                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 207                     "Unable to find host %06x\n", key);
 208
 209         return host;
 210 }
 211
 212 static inline
 213 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 214         uint16_t vp_idx)
 215 {
 216         struct qla_hw_data *ha = vha->hw;
 217
 218         if (vha->vp_idx == vp_idx)
 219                 return vha;
 220
 221         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 222         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 223                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 224
 225         return NULL;
 226 }
 227
 228 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 229 {
 230         unsigned long flags;
 231
 232         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 233
 234         vha->hw->tgt.num_pend_cmds++;
 235         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 236                 vha->qla_stats.stat_max_pend_cmds =
 237                         vha->hw->tgt.num_pend_cmds;
 238         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 239 }
 240 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 241 {
 242         unsigned long flags;
 243
 244         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 245         vha->hw->tgt.num_pend_cmds--;
 246         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 247 }
 248
 249
 250 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 251         struct atio_from_isp *atio, uint8_t ha_locked)
 252 {
 253         struct qla_tgt_sess_op *u;
 254         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 255         unsigned long flags;
 256
 257         if (tgt->tgt_stop) {
 258                 ql_dbg(ql_dbg_async, vha, 0x502c,
 259                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 260                     vha->vp_idx);
 261                 goto out_term;
 262         }
 263
 264         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 265         if (u == NULL)
 266                 goto out_term;
 267
 268         u->vha = vha;
 269         memcpy(&u->atio, atio, sizeof(*atio));
 270         INIT_LIST_HEAD(&u->cmd_list);
 271
 272         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 273         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 274         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 275
 276         schedule_delayed_work(&vha->unknown_atio_work, 1);
 277
 278 out:
 279         return;
 280
 281 out_term:
 282         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 283         goto out;
 284 }
 285
 286 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 287         uint8_t ha_locked)
 288 {
 289         struct qla_tgt_sess_op *u, *t;
 290         scsi_qla_host_t *host;
 291         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 292         unsigned long flags;
 293         uint8_t queued = 0;
 294
 295         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 296                 if (u->aborted) {
 297                         ql_dbg(ql_dbg_async, vha, 0x502e,
 298                             "Freeing unknown %s %p, because of Abort\n",
 299                             "ATIO_TYPE7", u);
 300                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 301                             &u->atio, ha_locked, 0);
 302                         goto abort;
 303                 }
 304
 305                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 306                 if (host != NULL) {
 307                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 308                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 309                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 310                 } else if (tgt->tgt_stop) {
 311                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 312                             "Freeing unknown %s %p, because tgt is being stopped\n",
 313                             "ATIO_TYPE7", u);
 314                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 315                             &u->atio, ha_locked, 0);
 316                 } else {
 317                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 318                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 319                         if (!queued) {
 320                                 queued = 1;
 321                                 schedule_delayed_work(&vha->unknown_atio_work,
 322                                     1);
 323                         }
 324                         continue;
 325                 }
 326
 327 abort:
 328                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 329                 list_del(&u->cmd_list);
 330                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 331                 kfree(u);
 332         }
 333 }
 334
 335 void qlt_unknown_atio_work_fn(struct work_struct *work)
 336 {
 337         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 338             struct scsi_qla_host, unknown_atio_work);
 339
 340         qlt_try_to_dequeue_unknown_atios(vha, 0);
 341 }
 342
 343 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 344         struct atio_from_isp *atio, uint8_t ha_locked)
 345 {
 346         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 347                 "%s: qla_target(%d): type %x ox_id %04x\n",
 348                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 349                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 350
 351         switch (atio->u.raw.entry_type) {
 352         case ATIO_TYPE7:
 353         {
 354                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 355                     atio->u.isp24.fcp_hdr.d_id);
 356                 if (unlikely(NULL == host)) {
 357                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 358                             "qla_target(%d): Received ATIO_TYPE7 "
 359                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 360                             atio->u.isp24.fcp_hdr.d_id[0],
 361                             atio->u.isp24.fcp_hdr.d_id[1],
 362                             atio->u.isp24.fcp_hdr.d_id[2]);
 363
 364
 365                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 366                         break;
 367                 }
 368                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 369                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 370
 371                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 372                 break;
 373         }
 374
 375         case IMMED_NOTIFY_TYPE:
 376         {
 377                 struct scsi_qla_host *host = vha;
 378                 struct imm_ntfy_from_isp *entry =
 379                     (struct imm_ntfy_from_isp *)atio;
 380
 381                 qlt_issue_marker(vha, ha_locked);
 382
 383                 if ((entry->u.isp24.vp_index != 0xFF) &&
 384                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 385                         host = qlt_find_host_by_vp_idx(vha,
 386                             entry->u.isp24.vp_index);
 387                         if (unlikely(!host)) {
 388                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 389                                     "qla_target(%d): Received "
 390                                     "ATIO (IMMED_NOTIFY_TYPE) "
 391                                     "with unknown vp_index %d\n",
 392                                     vha->vp_idx, entry->u.isp24.vp_index);
 393                                 break;
 394                         }
 395                 }
 396                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 397                 break;
 398         }
 399
 400         case VP_RPT_ID_IOCB_TYPE:
 401                 qla24xx_report_id_acquisition(vha,
 402                         (struct vp_rpt_id_entry_24xx *)atio);
 403                 break;
 404
 405         case ABTS_RECV_24XX:
 406         {
 407                 struct abts_recv_from_24xx *entry =
 408                         (struct abts_recv_from_24xx *)atio;
 409                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 410                         entry->vp_index);
 411                 unsigned long flags;
 412
 413                 if (unlikely(!host)) {
 414                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 415                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 416                             "received, with unknown vp_index %d\n",
 417                             vha->vp_idx, entry->vp_index);
 418                         break;
 419                 }
 420                 if (!ha_locked)
 421                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 422                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 423                 if (!ha_locked)
 424                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 425                 break;
 426         }
 427
 428         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 429
 430         default:
 431                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 432                     "qla_target(%d): Received unknown ATIO atio "
 433                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 434                 break;
 435         }
 436
 437         return false;
 438 }
 439
 440 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 441         struct rsp_que *rsp, response_t *pkt)
 442 {
 443         switch (pkt->entry_type) {
 444         case CTIO_CRC2:
 445                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 446                         "qla_target(%d):%s: CRC2 Response pkt\n",
 447                         vha->vp_idx, __func__);
 448                 /* fall through */
 449         case CTIO_TYPE7:
 450         {
 451                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 452                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 453                     entry->vp_index);
 454                 if (unlikely(!host)) {
 455                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 456                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 457                             "received, with unknown vp_index %d\n",
 458                             vha->vp_idx, entry->vp_index);
 459                         break;
 460                 }
 461                 qlt_response_pkt(host, rsp, pkt);
 462                 break;
 463         }
 464
 465         case IMMED_NOTIFY_TYPE:
 466         {
 467                 struct scsi_qla_host *host = vha;
 468                 struct imm_ntfy_from_isp *entry =
 469                     (struct imm_ntfy_from_isp *)pkt;
 470
 471                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 472                 if (unlikely(!host)) {
 473                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 474                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 475                             "received, with unknown vp_index %d\n",
 476                             vha->vp_idx, entry->u.isp24.vp_index);
 477                         break;
 478                 }
 479                 qlt_response_pkt(host, rsp, pkt);
 480                 break;
 481         }
 482
 483         case NOTIFY_ACK_TYPE:
 484         {
 485                 struct scsi_qla_host *host = vha;
 486                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 487
 488                 if (0xFF != entry->u.isp24.vp_index) {
 489                         host = qlt_find_host_by_vp_idx(vha,
 490                             entry->u.isp24.vp_index);
 491                         if (unlikely(!host)) {
 492                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 493                                     "qla_target(%d): Response "
 494                                     "pkt (NOTIFY_ACK_TYPE) "
 495                                     "received, with unknown "
 496                                     "vp_index %d\n", vha->vp_idx,
 497                                     entry->u.isp24.vp_index);
 498                                 break;
 499                         }
 500                 }
 501                 qlt_response_pkt(host, rsp, pkt);
 502                 break;
 503         }
 504
 505         case ABTS_RECV_24XX:
 506         {
 507                 struct abts_recv_from_24xx *entry =
 508                     (struct abts_recv_from_24xx *)pkt;
 509                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 510                     entry->vp_index);
 511                 if (unlikely(!host)) {
 512                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 513                             "qla_target(%d): Response pkt "
 514                             "(ABTS_RECV_24XX) received, with unknown "
 515                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 516                         break;
 517                 }
 518                 qlt_response_pkt(host, rsp, pkt);
 519                 break;
 520         }
 521
 522         case ABTS_RESP_24XX:
 523         {
 524                 struct abts_resp_to_24xx *entry =
 525                     (struct abts_resp_to_24xx *)pkt;
 526                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 527                     entry->vp_index);
 528                 if (unlikely(!host)) {
 529                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 530                             "qla_target(%d): Response pkt "
 531                             "(ABTS_RECV_24XX) received, with unknown "
 532                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 533                         break;
 534                 }
 535                 qlt_response_pkt(host, rsp, pkt);
 536                 break;
 537         }
 538         default:
 539                 qlt_response_pkt(vha, rsp, pkt);
 540                 break;
 541         }
 542
 543 }
 544
 545 /*
 546  * All qlt_plogi_ack_t operations are protected by hardware_lock
 547  */
 548 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 549         struct imm_ntfy_from_isp *ntfy, int type)
 550 {
 551         struct qla_work_evt *e;
 552
 553         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 554         if (!e)
 555                 return QLA_FUNCTION_FAILED;
 556
 557         e->u.nack.fcport = fcport;
 558         e->u.nack.type = type;
 559         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 560         return qla2x00_post_work(vha, e);
 561 }
 562
 563 static
 564 void qla2x00_async_nack_sp_done(void *s, int res)
 565 {
 566         struct srb *sp = (struct srb *)s;
 567         struct scsi_qla_host *vha = sp->vha;
 568         unsigned long flags;
 569
 570         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 571             "Async done-%s res %x %8phC  type %d\n",
 572             sp->name, res, sp->fcport->port_name, sp->type);
 573
 574         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 575         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 576         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 577
 578         switch (sp->type) {
 579         case SRB_NACK_PLOGI:
 580                 sp->fcport->login_gen++;
 581                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 582                 sp->fcport->logout_on_delete = 1;
 583                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 584                 sp->fcport->send_els_logo = 0;
 585                 break;
 586
 587         case SRB_NACK_PRLI:
 588                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 589                 sp->fcport->deleted = 0;
 590                 sp->fcport->send_els_logo = 0;
 591
 592                 if (!sp->fcport->login_succ &&
 593                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 594                         sp->fcport->login_succ = 1;
 595
 596                         vha->fcport_count++;
 597                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 598                         qla24xx_sched_upd_fcport(sp->fcport);
 599                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 600                 } else {
 601                         sp->fcport->login_retry = 0;
 602                         sp->fcport->disc_state = DSC_LOGIN_COMPLETE;
 603                         sp->fcport->deleted = 0;
 604                         sp->fcport->logout_on_delete = 1;
 605                 }
 606                 break;
 607
 608         case SRB_NACK_LOGO:
 609                 sp->fcport->login_gen++;
 610                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 611                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 612                 break;
 613         }
 614         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 615
 616         sp->free(sp);
 617 }
 618
 619 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 620         struct imm_ntfy_from_isp *ntfy, int type)
 621 {
 622         int rval = QLA_FUNCTION_FAILED;
 623         srb_t *sp;
 624         char *c = NULL;
 625
 626         fcport->flags |= FCF_ASYNC_SENT;
 627         switch (type) {
 628         case SRB_NACK_PLOGI:
 629                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 630                 c = "PLOGI";
 631                 break;
 632         case SRB_NACK_PRLI:
 633                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 634                 fcport->deleted = 0;
 635                 c = "PRLI";
 636                 break;
 637         case SRB_NACK_LOGO:
 638                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 639                 c = "LOGO";
 640                 break;
 641         }
 642
 643         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 644         if (!sp)
 645                 goto done;
 646
 647         sp->type = type;
 648         sp->name = "nack";
 649
 650         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 651         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 652
 653         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 654         sp->done = qla2x00_async_nack_sp_done;
 655
 656         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 657             "Async-%s %8phC hndl %x %s\n",
 658             sp->name, fcport->port_name, sp->handle, c);
 659
 660         rval = qla2x00_start_sp(sp);
 661         if (rval != QLA_SUCCESS)
 662                 goto done_free_sp;
 663
 664         return rval;
 665
 666 done_free_sp:
 667         sp->free(sp);
 668 done:
 669         fcport->flags &= ~FCF_ASYNC_SENT;
 670         return rval;
 671 }
 672
 673 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 674 {
 675         fc_port_t *t;
 676
 677         switch (e->u.nack.type) {
 678         case SRB_NACK_PRLI:
 679                 t = e->u.nack.fcport;
 680                 flush_work(&t->del_work);
 681                 flush_work(&t->free_work);
 682                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 683                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 684                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 685                 if (t) {
 686                         ql_log(ql_log_info, vha, 0xd034,
 687                             "%s create sess success %p", __func__, t);
 688                         /* create sess has an extra kref */
 689                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 690                 }
 691                 break;
 692         }
 693         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 694             (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
 695 }
 696
 697 void qla24xx_delete_sess_fn(struct work_struct *work)
 698 {
 699         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 700         struct qla_hw_data *ha = fcport->vha->hw;
 701
 702         if (fcport->se_sess) {
 703                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 704                 ha->tgt.tgt_ops->put_sess(fcport);
 705         } else {
 706                 qlt_unreg_sess(fcport);
 707         }
 708 }
 709
 710 /*
 711  * Called from qla2x00_reg_remote_port()
 712  */
 713 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 714 {
 715         struct qla_hw_data *ha = vha->hw;
 716         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 717         struct fc_port *sess = fcport;
 718         unsigned long flags;
 719
 720         if (!vha->hw->tgt.tgt_ops)
 721                 return;
 722
 723         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 724         if (tgt->tgt_stop) {
 725                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 726                 return;
 727         }
 728
 729         if (fcport->disc_state == DSC_DELETE_PEND) {
 730                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 731                 return;
 732         }
 733
 734         if (!sess->se_sess) {
 735                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 736
 737                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 738                 sess = qlt_create_sess(vha, fcport, false);
 739                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 740
 741                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 742         } else {
 743                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 744                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 745                         return;
 746                 }
 747
 748                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 749                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 750                             "%s: kref_get fail sess %8phC \n",
 751                             __func__, sess->port_name);
 752                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 753                         return;
 754                 }
 755
 756                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 757                     "qla_target(%u): %ssession for port %8phC "
 758                     "(loop ID %d) reappeared\n", vha->vp_idx,
 759                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 760
 761                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 762                     "Reappeared sess %p\n", sess);
 763
 764                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 765                     fcport->loop_id,
 766                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 767         }
 768
 769         if (sess && sess->local) {
 770                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 771                     "qla_target(%u): local session for "
 772                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 773                     fcport->port_name, sess->loop_id);
 774                 sess->local = 0;
 775         }
 776         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 777
 778         ha->tgt.tgt_ops->put_sess(sess);
 779 }
 780
 781 /*
 782  * This is a zero-base ref-counting solution, since hardware_lock
 783  * guarantees that ref_count is not modified concurrently.
 784  * Upon successful return content of iocb is undefined
 785  */
 786 static struct qlt_plogi_ack_t *
 787 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 788                        struct imm_ntfy_from_isp *iocb)
 789 {
 790         struct qlt_plogi_ack_t *pla;
 791
 792         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 793                 if (pla->id.b24 == id->b24) {
 794                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 795                             "%s %d %8phC Term INOT due to new INOT",
 796                             __func__, __LINE__,
 797                             pla->iocb.u.isp24.port_name);
 798                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 799                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 800                         return pla;
 801                 }
 802         }
 803
 804         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 805         if (!pla) {
 806                 ql_dbg(ql_dbg_async, vha, 0x5088,
 807                        "qla_target(%d): Allocation of plogi_ack failed\n",
 808                        vha->vp_idx);
 809                 return NULL;
 810         }
 811
 812         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 813         pla->id = *id;
 814         list_add_tail(&pla->list, &vha->plogi_ack_list);
 815
 816         return pla;
 817 }
 818
 819 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 820     struct qlt_plogi_ack_t *pla)
 821 {
 822         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 823         port_id_t port_id;
 824         uint16_t loop_id;
 825         fc_port_t *fcport = pla->fcport;
 826
 827         BUG_ON(!pla->ref_count);
 828         pla->ref_count--;
 829
 830         if (pla->ref_count)
 831                 return;
 832
 833         ql_dbg(ql_dbg_disc, vha, 0x5089,
 834             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 835             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 836             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 837             iocb->u.isp24.port_id[0],
 838             le16_to_cpu(iocb->u.isp24.nport_handle),
 839             iocb->u.isp24.exchange_address, iocb->ox_id);
 840
 841         port_id.b.domain = iocb->u.isp24.port_id[2];
 842         port_id.b.area   = iocb->u.isp24.port_id[1];
 843         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 844         port_id.b.rsvd_1 = 0;
 845
 846         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 847
 848         fcport->loop_id = loop_id;
 849         fcport->d_id = port_id;
 850         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 851                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 852         else
 853                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 854
 855         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 856                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 857                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 858                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 859                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 860         }
 861
 862         list_del(&pla->list);
 863         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 864 }
 865
 866 void
 867 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 868     struct fc_port *sess, enum qlt_plogi_link_t link)
 869 {
 870         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 871         /* Inc ref_count first because link might already be pointing at pla */
 872         pla->ref_count++;
 873
 874         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 875                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 876                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 877                 sess, link, sess->port_name,
 878                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 879                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 880                 pla->ref_count, pla, link);
 881
 882         if (link == QLT_PLOGI_LINK_CONFLICT) {
 883                 switch (sess->disc_state) {
 884                 case DSC_DELETED:
 885                 case DSC_DELETE_PEND:
 886                         pla->ref_count--;
 887                         return;
 888                 default:
 889                         break;
 890                 }
 891         }
 892
 893         if (sess->plogi_link[link])
 894                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 895
 896         if (link == QLT_PLOGI_LINK_SAME_WWN)
 897                 pla->fcport = sess;
 898
 899         sess->plogi_link[link] = pla;
 900 }
 901
 902 typedef struct {
 903         /* These fields must be initialized by the caller */
 904         port_id_t id;
 905         /*
 906          * number of cmds dropped while we were waiting for
 907          * initiator to ack LOGO initialize to 1 if LOGO is
 908          * triggered by a command, otherwise, to 0
 909          */
 910         int cmd_count;
 911
 912         /* These fields are used by callee */
 913         struct list_head list;
 914 } qlt_port_logo_t;
 915
 916 static void
 917 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 918 {
 919         qlt_port_logo_t *tmp;
 920         int res;
 921
 922         mutex_lock(&vha->vha_tgt.tgt_mutex);
 923
 924         list_for_each_entry(tmp, &vha->logo_list, list) {
 925                 if (tmp->id.b24 == logo->id.b24) {
 926                         tmp->cmd_count += logo->cmd_count;
 927                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 928                         return;
 929                 }
 930         }
 931
 932         list_add_tail(&logo->list, &vha->logo_list);
 933
 934         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 935
 936         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 937
 938         mutex_lock(&vha->vha_tgt.tgt_mutex);
 939         list_del(&logo->list);
 940         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 941
 942         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 943             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 944             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 945             logo->cmd_count, res);
 946 }
 947
 948 void qlt_free_session_done(struct work_struct *work)
 949 {
 950         struct fc_port *sess = container_of(work, struct fc_port,
 951             free_work);
 952         struct qla_tgt *tgt = sess->tgt;
 953         struct scsi_qla_host *vha = sess->vha;
 954         struct qla_hw_data *ha = vha->hw;
 955         unsigned long flags;
 956         bool logout_started = false;
 957         scsi_qla_host_t *base_vha;
 958         struct qlt_plogi_ack_t *own =
 959                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 960
 961         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 962                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 963                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 964                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 965                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 966                 sess->logout_on_delete, sess->keep_nport_handle,
 967                 sess->send_els_logo);
 968
 969         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 970                 qla2x00_mark_device_lost(vha, sess, 0, 0);
 971
 972                 if (sess->send_els_logo) {
 973                         qlt_port_logo_t logo;
 974
 975                         logo.id = sess->d_id;
 976                         logo.cmd_count = 0;
 977                         if (!own)
 978                                 qlt_send_first_logo(vha, &logo);
 979                         sess->send_els_logo = 0;
 980                 }
 981
 982                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 983                         int rc;
 984
 985                         if (!own ||
 986                             (own &&
 987                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
 988                                 rc = qla2x00_post_async_logout_work(vha, sess,
 989                                     NULL);
 990                                 if (rc != QLA_SUCCESS)
 991                                         ql_log(ql_log_warn, vha, 0xf085,
 992                                             "Schedule logo failed sess %p rc %d\n",
 993                                             sess, rc);
 994                                 else
 995                                         logout_started = true;
 996                         } else if (own && (own->iocb.u.isp24.status_subcode ==
 997                                 ELS_PRLI) && ha->flags.rida_fmt2) {
 998                                 rc = qla2x00_post_async_prlo_work(vha, sess,
 999                                     NULL);
1000                                 if (rc != QLA_SUCCESS)
1001                                         ql_log(ql_log_warn, vha, 0xf085,
1002                                             "Schedule PRLO failed sess %p rc %d\n",
1003                                             sess, rc);
1004                                 else
1005                                         logout_started = true;
1006                         }
1007                 }
1008         }
1009
1010         /*
1011          * Release the target session for FC Nexus from fabric module code.
1012          */
1013         if (sess->se_sess != NULL)
1014                 ha->tgt.tgt_ops->free_session(sess);
1015
1016         if (logout_started) {
1017                 bool traced = false;
1018
1019                 while (!READ_ONCE(sess->logout_completed)) {
1020                         if (!traced) {
1021                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1022                                         "%s: waiting for sess %p logout\n",
1023                                         __func__, sess);
1024                                 traced = true;
1025                         }
1026                         msleep(100);
1027                 }
1028
1029                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1030                     "%s: sess %p logout completed\n", __func__, sess);
1031         }
1032
1033         if (sess->logo_ack_needed) {
1034                 sess->logo_ack_needed = 0;
1035                 qla24xx_async_notify_ack(vha, sess,
1036                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1037         }
1038
1039         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1040         if (sess->se_sess) {
1041                 sess->se_sess = NULL;
1042                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1043                         tgt->sess_count--;
1044         }
1045
1046         sess->disc_state = DSC_DELETED;
1047         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1048         sess->deleted = QLA_SESS_DELETED;
1049
1050         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1051                 vha->fcport_count--;
1052                 sess->login_succ = 0;
1053         }
1054
1055         qla2x00_clear_loop_id(sess);
1056
1057         if (sess->conflict) {
1058                 sess->conflict->login_pause = 0;
1059                 sess->conflict = NULL;
1060                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1061                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1062         }
1063
1064         {
1065                 struct qlt_plogi_ack_t *con =
1066                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1067                 struct imm_ntfy_from_isp *iocb;
1068
1069                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1070
1071                 if (con) {
1072                         iocb = &con->iocb;
1073                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1074                                  "se_sess %p / sess %p port %8phC is gone,"
1075                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1076                                  sess->se_sess, sess, sess->port_name,
1077                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1078                                  own ? own->ref_count : -1,
1079                                  iocb->u.isp24.port_name, con->ref_count);
1080                         qlt_plogi_ack_unref(vha, con);
1081                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1082                 } else {
1083                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1084                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1085                             sess->se_sess, sess, sess->port_name,
1086                             own ? "releasing own PLOGI" :
1087                             "no own PLOGI pending",
1088                             own ? own->ref_count : -1);
1089                 }
1090
1091                 if (own) {
1092                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1093                         qlt_plogi_ack_unref(vha, own);
1094                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1095                 }
1096         }
1097
1098         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1099
1100         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1101             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1102                 sess, sess->port_name, vha->fcport_count);
1103
1104         if (tgt && (tgt->sess_count == 0))
1105                 wake_up_all(&tgt->waitQ);
1106
1107         if (vha->fcport_count == 0)
1108                 wake_up_all(&vha->fcport_waitQ);
1109
1110         base_vha = pci_get_drvdata(ha->pdev);
1111
1112         sess->free_pending = 0;
1113
1114         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1115                 return;
1116
1117         if ((!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1118                 switch (vha->host->active_mode) {
1119                 case MODE_INITIATOR:
1120                 case MODE_DUAL:
1121                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1122                         qla2xxx_wake_dpc(vha);
1123                         break;
1124                 case MODE_TARGET:
1125                 default:
1126                         /* no-op */
1127                         break;
1128                 }
1129         }
1130 }
1131
1132 /* ha->tgt.sess_lock supposed to be held on entry */
1133 void qlt_unreg_sess(struct fc_port *sess)
1134 {
1135         struct scsi_qla_host *vha = sess->vha;
1136         unsigned long flags;
1137
1138         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1139             "%s sess %p for deletion %8phC\n",
1140             __func__, sess, sess->port_name);
1141
1142         spin_lock_irqsave(&sess->vha->work_lock, flags);
1143         if (sess->free_pending) {
1144                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1145                 return;
1146         }
1147         sess->free_pending = 1;
1148         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1149
1150         if (sess->se_sess)
1151                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1152
1153         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1154         sess->disc_state = DSC_DELETE_PEND;
1155         sess->last_rscn_gen = sess->rscn_gen;
1156         sess->last_login_gen = sess->login_gen;
1157
1158         if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1159             !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1160                 sess->nvme_flag |= NVME_FLAG_DELETING;
1161                 schedule_work(&sess->nvme_del_work);
1162         } else {
1163                 INIT_WORK(&sess->free_work, qlt_free_session_done);
1164                 schedule_work(&sess->free_work);
1165         }
1166 }
1167 EXPORT_SYMBOL(qlt_unreg_sess);
1168
1169 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1170 {
1171         struct qla_hw_data *ha = vha->hw;
1172         struct fc_port *sess = NULL;
1173         uint16_t loop_id;
1174         int res = 0;
1175         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1176         unsigned long flags;
1177
1178         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1179         if (loop_id == 0xFFFF) {
1180                 /* Global event */
1181                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1182                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1183                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1184                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1185         } else {
1186                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1187                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1188                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1189         }
1190
1191         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1192             "Using sess for qla_tgt_reset: %p\n", sess);
1193         if (!sess) {
1194                 res = -ESRCH;
1195                 return res;
1196         }
1197
1198         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1199             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1200             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1201             mcmd, loop_id);
1202
1203         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1204 }
1205
1206 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1207 {
1208         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1209                 sess->logout_on_delete = 0;
1210                 sess->logo_ack_needed = 0;
1211                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1212                 sess->scan_state = 0;
1213         }
1214 }
1215
1216 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1217 {
1218         struct qla_tgt *tgt = sess->tgt;
1219         unsigned long flags;
1220         u16 sec;
1221
1222         switch (sess->disc_state) {
1223         case DSC_DELETE_PEND:
1224                 return;
1225         case DSC_DELETED:
1226                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1227                         wake_up_all(&tgt->waitQ);
1228                 if (sess->vha->fcport_count == 0)
1229                         wake_up_all(&sess->vha->fcport_waitQ);
1230
1231                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1232                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1233                         return;
1234                 break;
1235         case DSC_UPD_FCPORT:
1236                 /*
1237                  * This port is not done reporting to upper layer.
1238                  * let it finish
1239                  */
1240                 sess->next_disc_state = DSC_DELETE_PEND;
1241                 sec = jiffies_to_msecs(jiffies -
1242                     sess->jiffies_at_registration)/1000;
1243                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1244                         sess->sec_since_registration = sec;
1245                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1246                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1247                             __func__, sess->port_name, sec);
1248                 }
1249                 return;
1250         default:
1251                 break;
1252         }
1253
1254         spin_lock_irqsave(&sess->vha->work_lock, flags);
1255         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1256                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1257                 return;
1258         }
1259         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1260         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1261
1262         sess->disc_state = DSC_DELETE_PEND;
1263
1264         qla24xx_chk_fcp_state(sess);
1265
1266         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1267             "Scheduling sess %p for deletion %8phC\n",
1268             sess, sess->port_name);
1269
1270         INIT_WORK(&sess->del_work, qla24xx_delete_sess_fn);
1271         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1272 }
1273
1274 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1275 {
1276         struct fc_port *sess;
1277         scsi_qla_host_t *vha = tgt->vha;
1278
1279         list_for_each_entry(sess, &vha->vp_fcports, list) {
1280                 if (sess->se_sess)
1281                         qlt_schedule_sess_for_deletion(sess);
1282         }
1283
1284         /* At this point tgt could be already dead */
1285 }
1286
1287 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1288         uint16_t *loop_id)
1289 {
1290         struct qla_hw_data *ha = vha->hw;
1291         dma_addr_t gid_list_dma;
1292         struct gid_list_info *gid_list;
1293         char *id_iter;
1294         int res, rc, i;
1295         uint16_t entries;
1296
1297         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1298             &gid_list_dma, GFP_KERNEL);
1299         if (!gid_list) {
1300                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1301                     "qla_target(%d): DMA Alloc failed of %u\n",
1302                     vha->vp_idx, qla2x00_gid_list_size(ha));
1303                 return -ENOMEM;
1304         }
1305
1306         /* Get list of logged in devices */
1307         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1308         if (rc != QLA_SUCCESS) {
1309                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1310                     "qla_target(%d): get_id_list() failed: %x\n",
1311                     vha->vp_idx, rc);
1312                 res = -EBUSY;
1313                 goto out_free_id_list;
1314         }
1315
1316         id_iter = (char *)gid_list;
1317         res = -ENOENT;
1318         for (i = 0; i < entries; i++) {
1319                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1320
1321                 if ((gid->al_pa == s_id[2]) &&
1322                     (gid->area == s_id[1]) &&
1323                     (gid->domain == s_id[0])) {
1324                         *loop_id = le16_to_cpu(gid->loop_id);
1325                         res = 0;
1326                         break;
1327                 }
1328                 id_iter += ha->gid_list_info_size;
1329         }
1330
1331 out_free_id_list:
1332         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1333             gid_list, gid_list_dma);
1334         return res;
1335 }
1336
1337 /*
1338  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1339  * Caller must put it.
1340  */
1341 static struct fc_port *qlt_create_sess(
1342         struct scsi_qla_host *vha,
1343         fc_port_t *fcport,
1344         bool local)
1345 {
1346         struct qla_hw_data *ha = vha->hw;
1347         struct fc_port *sess = fcport;
1348         unsigned long flags;
1349
1350         if (vha->vha_tgt.qla_tgt->tgt_stop)
1351                 return NULL;
1352
1353         if (fcport->se_sess) {
1354                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1355                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1356                             "%s: kref_get_unless_zero failed for %8phC\n",
1357                             __func__, sess->port_name);
1358                         return NULL;
1359                 }
1360                 return fcport;
1361         }
1362         sess->tgt = vha->vha_tgt.qla_tgt;
1363         sess->local = local;
1364
1365         /*
1366          * Under normal circumstances we want to logout from firmware when
1367          * session eventually ends and release corresponding nport handle.
1368          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1369          * code will adjust these flags as necessary.
1370          */
1371         sess->logout_on_delete = 1;
1372         sess->keep_nport_handle = 0;
1373         sess->logout_completed = 0;
1374
1375         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1376             &fcport->port_name[0], sess) < 0) {
1377                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1378                     "(%d) %8phC check_initiator_node_acl failed\n",
1379                     vha->vp_idx, fcport->port_name);
1380                 return NULL;
1381         } else {
1382                 kref_init(&fcport->sess_kref);
1383                 /*
1384                  * Take an extra reference to ->sess_kref here to handle
1385                  * fc_port access across ->tgt.sess_lock reaquire.
1386                  */
1387                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1388                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1389                             "%s: kref_get_unless_zero failed for %8phC\n",
1390                             __func__, sess->port_name);
1391                         return NULL;
1392                 }
1393
1394                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1395                 if (!IS_SW_RESV_ADDR(sess->d_id))
1396                         vha->vha_tgt.qla_tgt->sess_count++;
1397
1398                 qlt_do_generation_tick(vha, &sess->generation);
1399                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1400         }
1401
1402         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1403             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1404             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1405             vha->vha_tgt.qla_tgt->sess_count);
1406
1407         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1408             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1409             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1410             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1411             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1412             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1413
1414         return sess;
1415 }
1416
1417 /*
1418  * max_gen - specifies maximum session generation
1419  * at which this deletion requestion is still valid
1420  */
1421 void
1422 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1423 {
1424         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1425         struct fc_port *sess = fcport;
1426         unsigned long flags;
1427
1428         if (!vha->hw->tgt.tgt_ops)
1429                 return;
1430
1431         if (!tgt)
1432                 return;
1433
1434         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1435         if (tgt->tgt_stop) {
1436                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1437                 return;
1438         }
1439         if (!sess->se_sess) {
1440                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1441                 return;
1442         }
1443
1444         if (max_gen - sess->generation < 0) {
1445                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1446                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1447                     "Ignoring stale deletion request for se_sess %p / sess %p"
1448                     " for port %8phC, req_gen %d, sess_gen %d\n",
1449                     sess->se_sess, sess, sess->port_name, max_gen,
1450                     sess->generation);
1451                 return;
1452         }
1453
1454         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1455
1456         sess->local = 1;
1457         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1458         qlt_schedule_sess_for_deletion(sess);
1459 }
1460
1461 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1462 {
1463         struct qla_hw_data *ha = tgt->ha;
1464         unsigned long flags;
1465         int res;
1466         /*
1467          * We need to protect against race, when tgt is freed before or
1468          * inside wake_up()
1469          */
1470         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1471         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1472             "tgt %p, sess_count=%d\n",
1473             tgt, tgt->sess_count);
1474         res = (tgt->sess_count == 0);
1475         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1476
1477         return res;
1478 }
1479
1480 /* Called by tcm_qla2xxx configfs code */
1481 int qlt_stop_phase1(struct qla_tgt *tgt)
1482 {
1483         struct scsi_qla_host *vha = tgt->vha;
1484         struct qla_hw_data *ha = tgt->ha;
1485         unsigned long flags;
1486
1487         mutex_lock(&ha->optrom_mutex);
1488         mutex_lock(&qla_tgt_mutex);
1489
1490         if (tgt->tgt_stop || tgt->tgt_stopped) {
1491                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1492                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1493                 mutex_unlock(&qla_tgt_mutex);
1494                 mutex_unlock(&ha->optrom_mutex);
1495                 return -EPERM;
1496         }
1497
1498         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1499             vha->host_no, vha);
1500         /*
1501          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1502          * Lock is needed, because we still can get an incoming packet.
1503          */
1504         mutex_lock(&vha->vha_tgt.tgt_mutex);
1505         tgt->tgt_stop = 1;
1506         qlt_clear_tgt_db(tgt);
1507         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1508         mutex_unlock(&qla_tgt_mutex);
1509
1510         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1511             "Waiting for sess works (tgt %p)", tgt);
1512         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1513         while (!list_empty(&tgt->sess_works_list)) {
1514                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1515                 flush_scheduled_work();
1516                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1517         }
1518         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1519
1520         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1521             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1522
1523         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1524
1525         /* Big hammer */
1526         if (!ha->flags.host_shutting_down &&
1527             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1528                 qlt_disable_vha(vha);
1529
1530         /* Wait for sessions to clear out (just in case) */
1531         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1532         mutex_unlock(&ha->optrom_mutex);
1533
1534         return 0;
1535 }
1536 EXPORT_SYMBOL(qlt_stop_phase1);
1537
1538 /* Called by tcm_qla2xxx configfs code */
1539 void qlt_stop_phase2(struct qla_tgt *tgt)
1540 {
1541         scsi_qla_host_t *vha = tgt->vha;
1542
1543         if (tgt->tgt_stopped) {
1544                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1545                     "Already in tgt->tgt_stopped state\n");
1546                 dump_stack();
1547                 return;
1548         }
1549         if (!tgt->tgt_stop) {
1550                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1551                     "%s: phase1 stop is not completed\n", __func__);
1552                 dump_stack();
1553                 return;
1554         }
1555
1556         mutex_lock(&vha->vha_tgt.tgt_mutex);
1557         tgt->tgt_stop = 0;
1558         tgt->tgt_stopped = 1;
1559         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1560
1561         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1562             tgt);
1563
1564         switch (vha->qlini_mode) {
1565         case QLA2XXX_INI_MODE_EXCLUSIVE:
1566                 vha->flags.online = 1;
1567                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1568                 break;
1569         default:
1570                 break;
1571         }
1572 }
1573 EXPORT_SYMBOL(qlt_stop_phase2);
1574
1575 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1576 static void qlt_release(struct qla_tgt *tgt)
1577 {
1578         scsi_qla_host_t *vha = tgt->vha;
1579         void *node;
1580         u64 key = 0;
1581         u16 i;
1582         struct qla_qpair_hint *h;
1583         struct qla_hw_data *ha = vha->hw;
1584
1585         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
1586             !tgt->tgt_stopped)
1587                 qlt_stop_phase1(tgt);
1588
1589         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1590                 qlt_stop_phase2(tgt);
1591
1592         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1593                 unsigned long flags;
1594
1595                 h = &tgt->qphints[i];
1596                 if (h->qpair) {
1597                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1598                         list_del(&h->hint_elem);
1599                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1600                         h->qpair = NULL;
1601                 }
1602         }
1603         kfree(tgt->qphints);
1604         mutex_lock(&qla_tgt_mutex);
1605         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1606         mutex_unlock(&qla_tgt_mutex);
1607
1608         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1609                 btree_remove64(&tgt->lun_qpair_map, key);
1610
1611         btree_destroy64(&tgt->lun_qpair_map);
1612
1613         if (vha->vp_idx)
1614                 if (ha->tgt.tgt_ops &&
1615                     ha->tgt.tgt_ops->remove_target &&
1616                     vha->vha_tgt.target_lport_ptr)
1617                         ha->tgt.tgt_ops->remove_target(vha);
1618
1619         vha->vha_tgt.qla_tgt = NULL;
1620
1621         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1622             "Release of tgt %p finished\n", tgt);
1623
1624         kfree(tgt);
1625 }
1626
1627 /* ha->hardware_lock supposed to be held on entry */
1628 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1629         const void *param, unsigned int param_size)
1630 {
1631         struct qla_tgt_sess_work_param *prm;
1632         unsigned long flags;
1633
1634         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1635         if (!prm) {
1636                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1637                     "qla_target(%d): Unable to create session "
1638                     "work, command will be refused", 0);
1639                 return -ENOMEM;
1640         }
1641
1642         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1643             "Scheduling work (type %d, prm %p)"
1644             " to find session for param %p (size %d, tgt %p)\n",
1645             type, prm, param, param_size, tgt);
1646
1647         prm->type = type;
1648         memcpy(&prm->tm_iocb, param, param_size);
1649
1650         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1651         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1652         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1653
1654         schedule_work(&tgt->sess_work);
1655
1656         return 0;
1657 }
1658
1659 /*
1660  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1661  */
1662 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1663         struct imm_ntfy_from_isp *ntfy,
1664         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1665         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1666 {
1667         struct scsi_qla_host *vha = qpair->vha;
1668         struct qla_hw_data *ha = vha->hw;
1669         request_t *pkt;
1670         struct nack_to_isp *nack;
1671
1672         if (!ha->flags.fw_started)
1673                 return;
1674
1675         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1676
1677         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1678         if (!pkt) {
1679                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1680                     "qla_target(%d): %s failed: unable to allocate "
1681                     "request packet\n", vha->vp_idx, __func__);
1682                 return;
1683         }
1684
1685         if (vha->vha_tgt.qla_tgt != NULL)
1686                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1687
1688         pkt->entry_type = NOTIFY_ACK_TYPE;
1689         pkt->entry_count = 1;
1690
1691         nack = (struct nack_to_isp *)pkt;
1692         nack->ox_id = ntfy->ox_id;
1693
1694         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1695         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1696         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1697                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1698                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1699         }
1700         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1701         nack->u.isp24.status = ntfy->u.isp24.status;
1702         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1703         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1704         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1705         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1706         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1707         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1708         nack->u.isp24.srr_reject_code = srr_reject_code;
1709         nack->u.isp24.srr_reject_code_expl = srr_explan;
1710         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1711
1712         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1713             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1714             vha->vp_idx, nack->u.isp24.status);
1715
1716         /* Memory Barrier */
1717         wmb();
1718         qla2x00_start_iocbs(vha, qpair->req);
1719 }
1720
1721 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1722 {
1723         struct scsi_qla_host *vha = mcmd->vha;
1724         struct qla_hw_data *ha = vha->hw;
1725         struct abts_resp_to_24xx *resp;
1726         uint32_t f_ctl, h;
1727         uint8_t *p;
1728         int rc;
1729         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1730         struct qla_qpair *qpair = mcmd->qpair;
1731
1732         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1733             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1734             ha, mcmd->fc_tm_rsp);
1735
1736         rc = qlt_check_reserve_free_req(qpair, 1);
1737         if (rc) {
1738                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1739                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1740                     vha->vp_idx, __func__);
1741                 return -EAGAIN;
1742         }
1743
1744         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1745         memset(resp, 0, sizeof(*resp));
1746
1747         h = qlt_make_handle(qpair);
1748         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1749                 /*
1750                  * CTIO type 7 from the firmware doesn't provide a way to
1751                  * know the initiator's LOOP ID, hence we can't find
1752                  * the session and, so, the command.
1753                  */
1754                 return -EAGAIN;
1755         } else {
1756                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1757         }
1758
1759         resp->handle = MAKE_HANDLE(qpair->req->id, h);
1760         resp->entry_type = ABTS_RESP_24XX;
1761         resp->entry_count = 1;
1762         resp->nport_handle = abts->nport_handle;
1763         resp->vp_index = vha->vp_idx;
1764         resp->sof_type = abts->sof_type;
1765         resp->exchange_address = abts->exchange_address;
1766         resp->fcp_hdr_le = abts->fcp_hdr_le;
1767         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1768             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1769             F_CTL_SEQ_INITIATIVE);
1770         p = (uint8_t *)&f_ctl;
1771         resp->fcp_hdr_le.f_ctl[0] = *p++;
1772         resp->fcp_hdr_le.f_ctl[1] = *p++;
1773         resp->fcp_hdr_le.f_ctl[2] = *p;
1774
1775         resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1776         resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1777         resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1778         resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1779         resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1780         resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1781
1782         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1783         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1784                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1785                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1786                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1787                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1788                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1789                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1790         } else {
1791                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1792                 resp->payload.ba_rjt.reason_code =
1793                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1794                 /* Other bytes are zero */
1795         }
1796
1797         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1798
1799         /* Memory Barrier */
1800         wmb();
1801         if (qpair->reqq_start_iocbs)
1802                 qpair->reqq_start_iocbs(qpair);
1803         else
1804                 qla2x00_start_iocbs(vha, qpair->req);
1805
1806         return rc;
1807 }
1808
1809 /*
1810  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1811  */
1812 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1813         struct abts_recv_from_24xx *abts, uint32_t status,
1814         bool ids_reversed)
1815 {
1816         struct scsi_qla_host *vha = qpair->vha;
1817         struct qla_hw_data *ha = vha->hw;
1818         struct abts_resp_to_24xx *resp;
1819         uint32_t f_ctl;
1820         uint8_t *p;
1821
1822         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1823             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1824             ha, abts, status);
1825
1826         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1827             NULL);
1828         if (!resp) {
1829                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1830                     "qla_target(%d): %s failed: unable to allocate "
1831                     "request packet", vha->vp_idx, __func__);
1832                 return;
1833         }
1834
1835         resp->entry_type = ABTS_RESP_24XX;
1836         resp->handle = QLA_TGT_SKIP_HANDLE;
1837         resp->entry_count = 1;
1838         resp->nport_handle = abts->nport_handle;
1839         resp->vp_index = vha->vp_idx;
1840         resp->sof_type = abts->sof_type;
1841         resp->exchange_address = abts->exchange_address;
1842         resp->fcp_hdr_le = abts->fcp_hdr_le;
1843         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1844             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1845             F_CTL_SEQ_INITIATIVE);
1846         p = (uint8_t *)&f_ctl;
1847         resp->fcp_hdr_le.f_ctl[0] = *p++;
1848         resp->fcp_hdr_le.f_ctl[1] = *p++;
1849         resp->fcp_hdr_le.f_ctl[2] = *p;
1850         if (ids_reversed) {
1851                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1852                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1853                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1854                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1855                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1856                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1857         } else {
1858                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1859                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1860                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1861                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1862                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1863                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1864         }
1865         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1866         if (status == FCP_TMF_CMPL) {
1867                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1868                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1869                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1870                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1871                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1872                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1873         } else {
1874                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1875                 resp->payload.ba_rjt.reason_code =
1876                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1877                 /* Other bytes are zero */
1878         }
1879
1880         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1881
1882         /* Memory Barrier */
1883         wmb();
1884         if (qpair->reqq_start_iocbs)
1885                 qpair->reqq_start_iocbs(qpair);
1886         else
1887                 qla2x00_start_iocbs(vha, qpair->req);
1888 }
1889
1890 /*
1891  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1892  */
1893 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1894     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1895 {
1896         struct ctio7_to_24xx *ctio;
1897         u16 tmp;
1898         struct abts_recv_from_24xx *entry;
1899
1900         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1901         if (ctio == NULL) {
1902                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1903                     "qla_target(%d): %s failed: unable to allocate "
1904                     "request packet\n", vha->vp_idx, __func__);
1905                 return;
1906         }
1907
1908         if (mcmd)
1909                 /* abts from remote port */
1910                 entry = &mcmd->orig_iocb.abts;
1911         else
1912                 /* abts from this driver.  */
1913                 entry = (struct abts_recv_from_24xx *)pkt;
1914
1915         /*
1916          * We've got on entrance firmware's response on by us generated
1917          * ABTS response. So, in it ID fields are reversed.
1918          */
1919
1920         ctio->entry_type = CTIO_TYPE7;
1921         ctio->entry_count = 1;
1922         ctio->nport_handle = entry->nport_handle;
1923         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1924         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1925         ctio->vp_index = vha->vp_idx;
1926         ctio->exchange_addr = entry->exchange_addr_to_abort;
1927         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1928
1929         if (mcmd) {
1930                 ctio->initiator_id[0] = entry->fcp_hdr_le.s_id[0];
1931                 ctio->initiator_id[1] = entry->fcp_hdr_le.s_id[1];
1932                 ctio->initiator_id[2] = entry->fcp_hdr_le.s_id[2];
1933
1934                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1935                         tmp |= (mcmd->abort_io_attr << 9);
1936                 else if (qpair->retry_term_cnt & 1)
1937                         tmp |= (0x4 << 9);
1938         } else {
1939                 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1940                 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1941                 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1942
1943                 if (qpair->retry_term_cnt & 1)
1944                         tmp |= (0x4 << 9);
1945         }
1946         ctio->u.status1.flags = cpu_to_le16(tmp);
1947         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1948
1949         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1950             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1951             le16_to_cpu(ctio->u.status1.flags),
1952             le16_to_cpu(ctio->u.status1.ox_id),
1953             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1954
1955         /* Memory Barrier */
1956         wmb();
1957         if (qpair->reqq_start_iocbs)
1958                 qpair->reqq_start_iocbs(qpair);
1959         else
1960                 qla2x00_start_iocbs(vha, qpair->req);
1961
1962         if (mcmd)
1963                 qlt_build_abts_resp_iocb(mcmd);
1964         else
1965                 qlt_24xx_send_abts_resp(qpair,
1966                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
1967
1968 }
1969
1970 /* drop cmds for the given lun
1971  * XXX only looks for cmds on the port through which lun reset was recieved
1972  * XXX does not go through the list of other port (which may have cmds
1973  *     for the same lun)
1974  */
1975 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1976                                 u64 lun, uint8_t *s_id)
1977 {
1978         struct qla_tgt_sess_op *op;
1979         struct qla_tgt_cmd *cmd;
1980         uint32_t key;
1981         unsigned long flags;
1982
1983         key = sid_to_key(s_id);
1984         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1985         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1986                 uint32_t op_key;
1987                 u64 op_lun;
1988
1989                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1990                 op_lun = scsilun_to_int(
1991                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1992                 if (op_key == key && op_lun == lun)
1993                         op->aborted = true;
1994         }
1995
1996         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1997                 uint32_t op_key;
1998                 u64 op_lun;
1999
2000                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
2001                 op_lun = scsilun_to_int(
2002                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
2003                 if (op_key == key && op_lun == lun)
2004                         op->aborted = true;
2005         }
2006
2007         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
2008                 uint32_t cmd_key;
2009                 u64 cmd_lun;
2010
2011                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
2012                 cmd_lun = scsilun_to_int(
2013                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2014                 if (cmd_key == key && cmd_lun == lun)
2015                         cmd->aborted = 1;
2016         }
2017         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2018 }
2019
2020 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2021     uint64_t unpacked_lun)
2022 {
2023         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2024         struct qla_qpair_hint *h = NULL;
2025
2026         if (vha->flags.qpairs_available) {
2027                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2028                 if (!h)
2029                         h = &tgt->qphints[0];
2030         } else {
2031                 h = &tgt->qphints[0];
2032         }
2033
2034         return h;
2035 }
2036
2037 static void qlt_do_tmr_work(struct work_struct *work)
2038 {
2039         struct qla_tgt_mgmt_cmd *mcmd =
2040                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2041         struct qla_hw_data *ha = mcmd->vha->hw;
2042         int rc = EIO;
2043         uint32_t tag;
2044         unsigned long flags;
2045
2046         switch (mcmd->tmr_func) {
2047         case QLA_TGT_ABTS:
2048                 tag = mcmd->orig_iocb.abts.exchange_addr_to_abort;
2049                 break;
2050         default:
2051                 tag = 0;
2052                 break;
2053         }
2054
2055         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2056             mcmd->tmr_func, tag);
2057
2058         if (rc != 0) {
2059                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2060                 switch (mcmd->tmr_func) {
2061                 case QLA_TGT_ABTS:
2062                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2063                         qlt_build_abts_resp_iocb(mcmd);
2064                         break;
2065                 case QLA_TGT_LUN_RESET:
2066                 case QLA_TGT_CLEAR_TS:
2067                 case QLA_TGT_ABORT_TS:
2068                 case QLA_TGT_CLEAR_ACA:
2069                 case QLA_TGT_TARGET_RESET:
2070                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2071                             qla_sam_status);
2072                         break;
2073
2074                 case QLA_TGT_ABORT_ALL:
2075                 case QLA_TGT_NEXUS_LOSS_SESS:
2076                 case QLA_TGT_NEXUS_LOSS:
2077                         qlt_send_notify_ack(mcmd->qpair,
2078                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2079                         break;
2080                 }
2081                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2082
2083                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2084                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2085                     mcmd->vha->vp_idx, rc);
2086                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2087         }
2088 }
2089
2090 /* ha->hardware_lock supposed to be held on entry */
2091 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2092         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2093 {
2094         struct qla_hw_data *ha = vha->hw;
2095         struct qla_tgt_mgmt_cmd *mcmd;
2096         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2097
2098         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2099             "qla_target(%d): task abort (tag=%d)\n",
2100             vha->vp_idx, abts->exchange_addr_to_abort);
2101
2102         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2103         if (mcmd == NULL) {
2104                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2105                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2106                     vha->vp_idx, __func__);
2107                 return -ENOMEM;
2108         }
2109         memset(mcmd, 0, sizeof(*mcmd));
2110         mcmd->cmd_type = TYPE_TGT_TMCMD;
2111         mcmd->sess = sess;
2112         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2113         mcmd->reset_count = ha->base_qpair->chip_reset;
2114         mcmd->tmr_func = QLA_TGT_ABTS;
2115         mcmd->qpair = h->qpair;
2116         mcmd->vha = vha;
2117
2118         /*
2119          * LUN is looked up by target-core internally based on the passed
2120          * abts->exchange_addr_to_abort tag.
2121          */
2122         mcmd->se_cmd.cpuid = h->cpuid;
2123
2124         if (ha->tgt.tgt_ops->find_cmd_by_tag) {
2125                 struct qla_tgt_cmd *abort_cmd;
2126
2127                 abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2128                     abts->exchange_addr_to_abort);
2129                 if (abort_cmd && abort_cmd->qpair) {
2130                         mcmd->qpair = abort_cmd->qpair;
2131                         mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2132                         mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2133                         mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2134                 }
2135         }
2136
2137         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2138         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2139
2140         return 0;
2141 }
2142
2143 /*
2144  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2145  */
2146 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2147         struct abts_recv_from_24xx *abts)
2148 {
2149         struct qla_hw_data *ha = vha->hw;
2150         struct fc_port *sess;
2151         uint32_t tag = abts->exchange_addr_to_abort;
2152         uint8_t s_id[3];
2153         int rc;
2154         unsigned long flags;
2155
2156         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2157                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2158                     "qla_target(%d): ABTS: Abort Sequence not "
2159                     "supported\n", vha->vp_idx);
2160                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2161                     false);
2162                 return;
2163         }
2164
2165         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2166                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2167                     "qla_target(%d): ABTS: Unknown Exchange "
2168                     "Address received\n", vha->vp_idx);
2169                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2170                     false);
2171                 return;
2172         }
2173
2174         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2175             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2176             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
2177             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
2178             le32_to_cpu(abts->fcp_hdr_le.parameter));
2179
2180         s_id[0] = abts->fcp_hdr_le.s_id[2];
2181         s_id[1] = abts->fcp_hdr_le.s_id[1];
2182         s_id[2] = abts->fcp_hdr_le.s_id[0];
2183
2184         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2185         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2186         if (!sess) {
2187                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2188                     "qla_target(%d): task abort for non-existent session\n",
2189                     vha->vp_idx);
2190                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2191
2192                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2193                             false);
2194                 return;
2195         }
2196         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2197
2198
2199         if (sess->deleted) {
2200                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2201                     false);
2202                 return;
2203         }
2204
2205         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2206         if (rc != 0) {
2207                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2208                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2209                     vha->vp_idx, rc);
2210                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2211                     false);
2212                 return;
2213         }
2214 }
2215
2216 /*
2217  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2218  */
2219 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2220         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2221 {
2222         struct scsi_qla_host *ha = mcmd->vha;
2223         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2224         struct ctio7_to_24xx *ctio;
2225         uint16_t temp;
2226
2227         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2228             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2229             ha, atio, resp_code);
2230
2231
2232         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2233         if (ctio == NULL) {
2234                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2235                     "qla_target(%d): %s failed: unable to allocate "
2236                     "request packet\n", ha->vp_idx, __func__);
2237                 return;
2238         }
2239
2240         ctio->entry_type = CTIO_TYPE7;
2241         ctio->entry_count = 1;
2242         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2243         ctio->nport_handle = mcmd->sess->loop_id;
2244         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2245         ctio->vp_index = ha->vp_idx;
2246         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2247         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2248         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2249         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2250         temp = (atio->u.isp24.attr << 9)|
2251                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2252         ctio->u.status1.flags = cpu_to_le16(temp);
2253         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2254         ctio->u.status1.ox_id = cpu_to_le16(temp);
2255         ctio->u.status1.scsi_status =
2256             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2257         ctio->u.status1.response_len = cpu_to_le16(8);
2258         ctio->u.status1.sense_data[0] = resp_code;
2259
2260         /* Memory Barrier */
2261         wmb();
2262         if (qpair->reqq_start_iocbs)
2263                 qpair->reqq_start_iocbs(qpair);
2264         else
2265                 qla2x00_start_iocbs(ha, qpair->req);
2266 }
2267
2268 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2269 {
2270         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2271 }
2272 EXPORT_SYMBOL(qlt_free_mcmd);
2273
2274 /*
2275  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2276  * reacquire
2277  */
2278 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2279     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2280 {
2281         struct atio_from_isp *atio = &cmd->atio;
2282         struct ctio7_to_24xx *ctio;
2283         uint16_t temp;
2284         struct scsi_qla_host *vha = cmd->vha;
2285
2286         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2287             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2288             "sense_key=%02x, asc=%02x, ascq=%02x",
2289             vha, atio, scsi_status, sense_key, asc, ascq);
2290
2291         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2292         if (!ctio) {
2293                 ql_dbg(ql_dbg_async, vha, 0x3067,
2294                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2295                     vha->host_no, __func__);
2296                 goto out;
2297         }
2298
2299         ctio->entry_type = CTIO_TYPE7;
2300         ctio->entry_count = 1;
2301         ctio->handle = QLA_TGT_SKIP_HANDLE;
2302         ctio->nport_handle = cmd->sess->loop_id;
2303         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2304         ctio->vp_index = vha->vp_idx;
2305         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2306         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2307         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2308         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2309         temp = (atio->u.isp24.attr << 9) |
2310             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2311         ctio->u.status1.flags = cpu_to_le16(temp);
2312         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2313         ctio->u.status1.ox_id = cpu_to_le16(temp);
2314         ctio->u.status1.scsi_status =
2315             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2316         ctio->u.status1.response_len = cpu_to_le16(18);
2317         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2318
2319         if (ctio->u.status1.residual != 0)
2320                 ctio->u.status1.scsi_status |=
2321                     cpu_to_le16(SS_RESIDUAL_UNDER);
2322
2323         /* Fixed format sense data. */
2324         ctio->u.status1.sense_data[0] = 0x70;
2325         ctio->u.status1.sense_data[2] = sense_key;
2326         /* Additional sense length */
2327         ctio->u.status1.sense_data[7] = 0xa;
2328         /* ASC and ASCQ */
2329         ctio->u.status1.sense_data[12] = asc;
2330         ctio->u.status1.sense_data[13] = ascq;
2331
2332         /* Memory Barrier */
2333         wmb();
2334
2335         if (qpair->reqq_start_iocbs)
2336                 qpair->reqq_start_iocbs(qpair);
2337         else
2338                 qla2x00_start_iocbs(vha, qpair->req);
2339
2340 out:
2341         return;
2342 }
2343
2344 /* callback from target fabric module code */
2345 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2346 {
2347         struct scsi_qla_host *vha = mcmd->sess->vha;
2348         struct qla_hw_data *ha = vha->hw;
2349         unsigned long flags;
2350         struct qla_qpair *qpair = mcmd->qpair;
2351         bool free_mcmd = true;
2352
2353         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2354             "TM response mcmd (%p) status %#x state %#x",
2355             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2356
2357         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2358
2359         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2360                 /*
2361                  * Either the port is not online or this request was from
2362                  * previous life, just abort the processing.
2363                  */
2364                 ql_dbg(ql_dbg_async, vha, 0xe100,
2365                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2366                         vha->flags.online, qla2x00_reset_active(vha),
2367                         mcmd->reset_count, qpair->chip_reset);
2368                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2369                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2370                 return;
2371         }
2372
2373         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2374                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2375                 case ELS_LOGO:
2376                 case ELS_PRLO:
2377                 case ELS_TPRLO:
2378                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2379                             "TM response logo %8phC status %#x state %#x",
2380                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2381                             mcmd->flags);
2382                         qlt_schedule_sess_for_deletion(mcmd->sess);
2383                         break;
2384                 default:
2385                         qlt_send_notify_ack(vha->hw->base_qpair,
2386                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2387                         break;
2388                 }
2389         } else {
2390                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2391                         qlt_build_abts_resp_iocb(mcmd);
2392                         free_mcmd = false;
2393                 } else
2394                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2395                             mcmd->fc_tm_rsp);
2396         }
2397         /*
2398          * Make the callback for ->free_mcmd() to queue_work() and invoke
2399          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2400          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2401          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2402          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2403          * qlt_xmit_tm_rsp() returns here..
2404          */
2405         if (free_mcmd)
2406                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2407
2408         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2409 }
2410 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2411
2412 /* No locks */
2413 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2414 {
2415         struct qla_tgt_cmd *cmd = prm->cmd;
2416
2417         BUG_ON(cmd->sg_cnt == 0);
2418
2419         prm->sg = (struct scatterlist *)cmd->sg;
2420         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2421             cmd->sg_cnt, cmd->dma_data_direction);
2422         if (unlikely(prm->seg_cnt == 0))
2423                 goto out_err;
2424
2425         prm->cmd->sg_mapped = 1;
2426
2427         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2428                 /*
2429                  * If greater than four sg entries then we need to allocate
2430                  * the continuation entries
2431                  */
2432                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2433                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2434                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2435                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2436         } else {
2437                 /* DIF */
2438                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2439                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2440                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2441                         prm->tot_dsds = prm->seg_cnt;
2442                 } else
2443                         prm->tot_dsds = prm->seg_cnt;
2444
2445                 if (cmd->prot_sg_cnt) {
2446                         prm->prot_sg      = cmd->prot_sg;
2447                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2448                                 cmd->prot_sg, cmd->prot_sg_cnt,
2449                                 cmd->dma_data_direction);
2450                         if (unlikely(prm->prot_seg_cnt == 0))
2451                                 goto out_err;
2452
2453                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2454                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2455                                 /* Dif Bundling not support here */
2456                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2457                                                                 cmd->blk_sz);
2458                                 prm->tot_dsds += prm->prot_seg_cnt;
2459                         } else
2460                                 prm->tot_dsds += prm->prot_seg_cnt;
2461                 }
2462         }
2463
2464         return 0;
2465
2466 out_err:
2467         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2468             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2469             0, prm->cmd->sg_cnt);
2470         return -1;
2471 }
2472
2473 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2474 {
2475         struct qla_hw_data *ha;
2476         struct qla_qpair *qpair;
2477
2478         if (!cmd->sg_mapped)
2479                 return;
2480
2481         qpair = cmd->qpair;
2482
2483         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2484             cmd->dma_data_direction);
2485         cmd->sg_mapped = 0;
2486
2487         if (cmd->prot_sg_cnt)
2488                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2489                         cmd->dma_data_direction);
2490
2491         if (!cmd->ctx)
2492                 return;
2493         ha = vha->hw;
2494         if (cmd->ctx_dsd_alloced)
2495                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2496
2497         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2498 }
2499
2500 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2501         uint32_t req_cnt)
2502 {
2503         uint32_t cnt;
2504         struct req_que *req = qpair->req;
2505
2506         if (req->cnt < (req_cnt + 2)) {
2507                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2508                     RD_REG_DWORD_RELAXED(req->req_q_out));
2509
2510                 if  (req->ring_index < cnt)
2511                         req->cnt = cnt - req->ring_index;
2512                 else
2513                         req->cnt = req->length - (req->ring_index - cnt);
2514
2515                 if (unlikely(req->cnt < (req_cnt + 2)))
2516                         return -EAGAIN;
2517         }
2518
2519         req->cnt -= req_cnt;
2520
2521         return 0;
2522 }
2523
2524 /*
2525  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2526  */
2527 static inline void *qlt_get_req_pkt(struct req_que *req)
2528 {
2529         /* Adjust ring index. */
2530         req->ring_index++;
2531         if (req->ring_index == req->length) {
2532                 req->ring_index = 0;
2533                 req->ring_ptr = req->ring;
2534         } else {
2535                 req->ring_ptr++;
2536         }
2537         return (cont_entry_t *)req->ring_ptr;
2538 }
2539
2540 /* ha->hardware_lock supposed to be held on entry */
2541 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2542 {
2543         uint32_t h;
2544         int index;
2545         uint8_t found = 0;
2546         struct req_que *req = qpair->req;
2547
2548         h = req->current_outstanding_cmd;
2549
2550         for (index = 1; index < req->num_outstanding_cmds; index++) {
2551                 h++;
2552                 if (h == req->num_outstanding_cmds)
2553                         h = 1;
2554
2555                 if (h == QLA_TGT_SKIP_HANDLE)
2556                         continue;
2557
2558                 if (!req->outstanding_cmds[h]) {
2559                         found = 1;
2560                         break;
2561                 }
2562         }
2563
2564         if (found) {
2565                 req->current_outstanding_cmd = h;
2566         } else {
2567                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2568                     "qla_target(%d): Ran out of empty cmd slots\n",
2569                     qpair->vha->vp_idx);
2570                 h = QLA_TGT_NULL_HANDLE;
2571         }
2572
2573         return h;
2574 }
2575
2576 /* ha->hardware_lock supposed to be held on entry */
2577 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2578         struct qla_tgt_prm *prm)
2579 {
2580         uint32_t h;
2581         struct ctio7_to_24xx *pkt;
2582         struct atio_from_isp *atio = &prm->cmd->atio;
2583         uint16_t temp;
2584
2585         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2586         prm->pkt = pkt;
2587         memset(pkt, 0, sizeof(*pkt));
2588
2589         pkt->entry_type = CTIO_TYPE7;
2590         pkt->entry_count = (uint8_t)prm->req_cnt;
2591         pkt->vp_index = prm->cmd->vp_idx;
2592
2593         h = qlt_make_handle(qpair);
2594         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2595                 /*
2596                  * CTIO type 7 from the firmware doesn't provide a way to
2597                  * know the initiator's LOOP ID, hence we can't find
2598                  * the session and, so, the command.
2599                  */
2600                 return -EAGAIN;
2601         } else
2602                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2603
2604         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2605         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2606         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2607         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2608         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2609         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2610         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2611         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2612         temp = atio->u.isp24.attr << 9;
2613         pkt->u.status0.flags |= cpu_to_le16(temp);
2614         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2615         pkt->u.status0.ox_id = cpu_to_le16(temp);
2616         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2617
2618         return 0;
2619 }
2620
2621 /*
2622  * ha->hardware_lock supposed to be held on entry. We have already made sure
2623  * that there is sufficient amount of request entries to not drop it.
2624  */
2625 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2626 {
2627         int cnt;
2628         struct dsd64 *cur_dsd;
2629
2630         /* Build continuation packets */
2631         while (prm->seg_cnt > 0) {
2632                 cont_a64_entry_t *cont_pkt64 =
2633                         (cont_a64_entry_t *)qlt_get_req_pkt(
2634                            prm->cmd->qpair->req);
2635
2636                 /*
2637                  * Make sure that from cont_pkt64 none of
2638                  * 64-bit specific fields used for 32-bit
2639                  * addressing. Cast to (cont_entry_t *) for
2640                  * that.
2641                  */
2642
2643                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2644
2645                 cont_pkt64->entry_count = 1;
2646                 cont_pkt64->sys_define = 0;
2647
2648                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2649                 cur_dsd = cont_pkt64->dsd;
2650
2651                 /* Load continuation entry data segments */
2652                 for (cnt = 0;
2653                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2654                     cnt++, prm->seg_cnt--) {
2655                         append_dsd64(&cur_dsd, prm->sg);
2656                         prm->sg = sg_next(prm->sg);
2657                 }
2658         }
2659 }
2660
2661 /*
2662  * ha->hardware_lock supposed to be held on entry. We have already made sure
2663  * that there is sufficient amount of request entries to not drop it.
2664  */
2665 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2666 {
2667         int cnt;
2668         struct dsd64 *cur_dsd;
2669         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2670
2671         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2672
2673         /* Setup packet address segment pointer */
2674         cur_dsd = &pkt24->u.status0.dsd;
2675
2676         /* Set total data segment count */
2677         if (prm->seg_cnt)
2678                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2679
2680         if (prm->seg_cnt == 0) {
2681                 /* No data transfer */
2682                 cur_dsd->address = 0;
2683                 cur_dsd->length = 0;
2684                 return;
2685         }
2686
2687         /* If scatter gather */
2688
2689         /* Load command entry data segments */
2690         for (cnt = 0;
2691             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2692             cnt++, prm->seg_cnt--) {
2693                 append_dsd64(&cur_dsd, prm->sg);
2694                 prm->sg = sg_next(prm->sg);
2695         }
2696
2697         qlt_load_cont_data_segments(prm);
2698 }
2699
2700 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2701 {
2702         return cmd->bufflen > 0;
2703 }
2704
2705 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2706 {
2707         struct qla_tgt_cmd *cmd;
2708         struct scsi_qla_host *vha;
2709
2710         /* asc 0x10=dif error */
2711         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2712                 cmd = prm->cmd;
2713                 vha = cmd->vha;
2714                 /* ASCQ */
2715                 switch (prm->sense_buffer[13]) {
2716                 case 1:
2717                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2718                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2719                             "se_cmd=%p tag[%x]",
2720                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2721                             cmd->atio.u.isp24.exchange_addr);
2722                         break;
2723                 case 2:
2724                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2725                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2726                             "se_cmd=%p tag[%x]",
2727                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2728                             cmd->atio.u.isp24.exchange_addr);
2729                         break;
2730                 case 3:
2731                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2732                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2733                             "se_cmd=%p tag[%x]",
2734                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2735                             cmd->atio.u.isp24.exchange_addr);
2736                         break;
2737                 default:
2738                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2739                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2740                             "se_cmd=%p tag[%x]",
2741                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2742                             cmd->atio.u.isp24.exchange_addr);
2743                         break;
2744                 }
2745                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2746         }
2747 }
2748
2749 /*
2750  * Called without ha->hardware_lock held
2751  */
2752 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2753         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2754         uint32_t *full_req_cnt)
2755 {
2756         struct se_cmd *se_cmd = &cmd->se_cmd;
2757         struct qla_qpair *qpair = cmd->qpair;
2758
2759         prm->cmd = cmd;
2760         prm->tgt = cmd->tgt;
2761         prm->pkt = NULL;
2762         prm->rq_result = scsi_status;
2763         prm->sense_buffer = &cmd->sense_buffer[0];
2764         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2765         prm->sg = NULL;
2766         prm->seg_cnt = -1;
2767         prm->req_cnt = 1;
2768         prm->residual = 0;
2769         prm->add_status_pkt = 0;
2770         prm->prot_sg = NULL;
2771         prm->prot_seg_cnt = 0;
2772         prm->tot_dsds = 0;
2773
2774         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2775                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2776                         return -EAGAIN;
2777         }
2778
2779         *full_req_cnt = prm->req_cnt;
2780
2781         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2782                 prm->residual = se_cmd->residual_count;
2783                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2784                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2785                        prm->residual, se_cmd->tag,
2786                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2787                        cmd->bufflen, prm->rq_result);
2788                 prm->rq_result |= SS_RESIDUAL_UNDER;
2789         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2790                 prm->residual = se_cmd->residual_count;
2791                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2792                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2793                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2794                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2795                 prm->rq_result |= SS_RESIDUAL_OVER;
2796         }
2797
2798         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2799                 /*
2800                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2801                  * ignored in *xmit_response() below
2802                  */
2803                 if (qlt_has_data(cmd)) {
2804                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2805                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2806                             (prm->rq_result != 0))) {
2807                                 prm->add_status_pkt = 1;
2808                                 (*full_req_cnt)++;
2809                         }
2810                 }
2811         }
2812
2813         return 0;
2814 }
2815
2816 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2817     int sending_sense)
2818 {
2819         if (cmd->qpair->enable_class_2)
2820                 return 0;
2821
2822         if (sending_sense)
2823                 return cmd->conf_compl_supported;
2824         else
2825                 return cmd->qpair->enable_explicit_conf &&
2826                     cmd->conf_compl_supported;
2827 }
2828
2829 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2830         struct qla_tgt_prm *prm)
2831 {
2832         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2833             (uint32_t)sizeof(ctio->u.status1.sense_data));
2834         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2835         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2836                 ctio->u.status0.flags |= cpu_to_le16(
2837                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2838                     CTIO7_FLAGS_CONFORM_REQ);
2839         }
2840         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2841         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2842         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2843                 int i;
2844
2845                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2846                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2847                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2848                                     "Skipping EXPLICIT_CONFORM and "
2849                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2850                                     "non GOOD status\n");
2851                                 goto skip_explict_conf;
2852                         }
2853                         ctio->u.status1.flags |= cpu_to_le16(
2854                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2855                             CTIO7_FLAGS_CONFORM_REQ);
2856                 }
2857 skip_explict_conf:
2858                 ctio->u.status1.flags &=
2859                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2860                 ctio->u.status1.flags |=
2861                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2862                 ctio->u.status1.scsi_status |=
2863                     cpu_to_le16(SS_SENSE_LEN_VALID);
2864                 ctio->u.status1.sense_length =
2865                     cpu_to_le16(prm->sense_buffer_len);
2866                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2867                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2868                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2869
2870                 qlt_print_dif_err(prm);
2871
2872         } else {
2873                 ctio->u.status1.flags &=
2874                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2875                 ctio->u.status1.flags |=
2876                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2877                 ctio->u.status1.sense_length = 0;
2878                 memset(ctio->u.status1.sense_data, 0,
2879                     sizeof(ctio->u.status1.sense_data));
2880         }
2881
2882         /* Sense with len > 24, is it possible ??? */
2883 }
2884
2885 static inline int
2886 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2887 {
2888         switch (se_cmd->prot_op) {
2889         case TARGET_PROT_DOUT_INSERT:
2890         case TARGET_PROT_DIN_STRIP:
2891                 if (ql2xenablehba_err_chk >= 1)
2892                         return 1;
2893                 break;
2894         case TARGET_PROT_DOUT_PASS:
2895         case TARGET_PROT_DIN_PASS:
2896                 if (ql2xenablehba_err_chk >= 2)
2897                         return 1;
2898                 break;
2899         case TARGET_PROT_DIN_INSERT:
2900         case TARGET_PROT_DOUT_STRIP:
2901                 return 1;
2902         default:
2903                 break;
2904         }
2905         return 0;
2906 }
2907
2908 static inline int
2909 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2910 {
2911         switch (se_cmd->prot_op) {
2912         case TARGET_PROT_DIN_INSERT:
2913         case TARGET_PROT_DOUT_INSERT:
2914         case TARGET_PROT_DIN_STRIP:
2915         case TARGET_PROT_DOUT_STRIP:
2916         case TARGET_PROT_DIN_PASS:
2917         case TARGET_PROT_DOUT_PASS:
2918             return 1;
2919         default:
2920             return 0;
2921         }
2922         return 0;
2923 }
2924
2925 /*
2926  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2927  */
2928 static void
2929 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2930     uint16_t *pfw_prot_opts)
2931 {
2932         struct se_cmd *se_cmd = &cmd->se_cmd;
2933         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2934         scsi_qla_host_t *vha = cmd->tgt->vha;
2935         struct qla_hw_data *ha = vha->hw;
2936         uint32_t t32 = 0;
2937
2938         /*
2939          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2940          * have been immplemented by TCM, before AppTag is avail.
2941          * Look for modesense_handlers[]
2942          */
2943         ctx->app_tag = 0;
2944         ctx->app_tag_mask[0] = 0x0;
2945         ctx->app_tag_mask[1] = 0x0;
2946
2947         if (IS_PI_UNINIT_CAPABLE(ha)) {
2948                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2949                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2950                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2951                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2952                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2953         }
2954
2955         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2956
2957         switch (se_cmd->prot_type) {
2958         case TARGET_DIF_TYPE0_PROT:
2959                 /*
2960                  * No check for ql2xenablehba_err_chk, as it
2961                  * would be an I/O error if hba tag generation
2962                  * is not done.
2963                  */
2964                 ctx->ref_tag = cpu_to_le32(lba);
2965                 /* enable ALL bytes of the ref tag */
2966                 ctx->ref_tag_mask[0] = 0xff;
2967                 ctx->ref_tag_mask[1] = 0xff;
2968                 ctx->ref_tag_mask[2] = 0xff;
2969                 ctx->ref_tag_mask[3] = 0xff;
2970                 break;
2971         case TARGET_DIF_TYPE1_PROT:
2972             /*
2973              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2974              * REF tag, and 16 bit app tag.
2975              */
2976             ctx->ref_tag = cpu_to_le32(lba);
2977             if (!qla_tgt_ref_mask_check(se_cmd) ||
2978                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2979                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2980                     break;
2981             }
2982             /* enable ALL bytes of the ref tag */
2983             ctx->ref_tag_mask[0] = 0xff;
2984             ctx->ref_tag_mask[1] = 0xff;
2985             ctx->ref_tag_mask[2] = 0xff;
2986             ctx->ref_tag_mask[3] = 0xff;
2987             break;
2988         case TARGET_DIF_TYPE2_PROT:
2989             /*
2990              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2991              * tag has to match LBA in CDB + N
2992              */
2993             ctx->ref_tag = cpu_to_le32(lba);
2994             if (!qla_tgt_ref_mask_check(se_cmd) ||
2995                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2996                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2997                     break;
2998             }
2999             /* enable ALL bytes of the ref tag */
3000             ctx->ref_tag_mask[0] = 0xff;
3001             ctx->ref_tag_mask[1] = 0xff;
3002             ctx->ref_tag_mask[2] = 0xff;
3003             ctx->ref_tag_mask[3] = 0xff;
3004             break;
3005         case TARGET_DIF_TYPE3_PROT:
3006             /* For TYPE 3 protection: 16 bit GUARD only */
3007             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3008             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
3009                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
3010             break;
3011         }
3012 }
3013
3014 static inline int
3015 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
3016 {
3017         struct dsd64            *cur_dsd;
3018         uint32_t                transfer_length = 0;
3019         uint32_t                data_bytes;
3020         uint32_t                dif_bytes;
3021         uint8_t                 bundling = 1;
3022         struct crc_context      *crc_ctx_pkt = NULL;
3023         struct qla_hw_data      *ha;
3024         struct ctio_crc2_to_fw  *pkt;
3025         dma_addr_t              crc_ctx_dma;
3026         uint16_t                fw_prot_opts = 0;
3027         struct qla_tgt_cmd      *cmd = prm->cmd;
3028         struct se_cmd           *se_cmd = &cmd->se_cmd;
3029         uint32_t h;
3030         struct atio_from_isp *atio = &prm->cmd->atio;
3031         struct qla_tc_param     tc;
3032         uint16_t t16;
3033         scsi_qla_host_t *vha = cmd->vha;
3034
3035         ha = vha->hw;
3036
3037         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3038         prm->pkt = pkt;
3039         memset(pkt, 0, sizeof(*pkt));
3040
3041         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3042                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3043                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3044                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3045
3046         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3047             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3048                 bundling = 0;
3049
3050         /* Compute dif len and adjust data len to incude protection */
3051         data_bytes = cmd->bufflen;
3052         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3053
3054         switch (se_cmd->prot_op) {
3055         case TARGET_PROT_DIN_INSERT:
3056         case TARGET_PROT_DOUT_STRIP:
3057                 transfer_length = data_bytes;
3058                 if (cmd->prot_sg_cnt)
3059                         data_bytes += dif_bytes;
3060                 break;
3061         case TARGET_PROT_DIN_STRIP:
3062         case TARGET_PROT_DOUT_INSERT:
3063         case TARGET_PROT_DIN_PASS:
3064         case TARGET_PROT_DOUT_PASS:
3065                 transfer_length = data_bytes + dif_bytes;
3066                 break;
3067         default:
3068                 BUG();
3069                 break;
3070         }
3071
3072         if (!qlt_hba_err_chk_enabled(se_cmd))
3073                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3074         /* HBA error checking enabled */
3075         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3076                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3077                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3078                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3079                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3080                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3081         }
3082
3083         switch (se_cmd->prot_op) {
3084         case TARGET_PROT_DIN_INSERT:
3085         case TARGET_PROT_DOUT_INSERT:
3086                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3087                 break;
3088         case TARGET_PROT_DIN_STRIP:
3089         case TARGET_PROT_DOUT_STRIP:
3090                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3091                 break;
3092         case TARGET_PROT_DIN_PASS:
3093         case TARGET_PROT_DOUT_PASS:
3094                 fw_prot_opts |= PO_MODE_DIF_PASS;
3095                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3096                 break;
3097         default:/* Normal Request */
3098                 fw_prot_opts |= PO_MODE_DIF_PASS;
3099                 break;
3100         }
3101
3102         /* ---- PKT ---- */
3103         /* Update entry type to indicate Command Type CRC_2 IOCB */
3104         pkt->entry_type  = CTIO_CRC2;
3105         pkt->entry_count = 1;
3106         pkt->vp_index = cmd->vp_idx;
3107
3108         h = qlt_make_handle(qpair);
3109         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3110                 /*
3111                  * CTIO type 7 from the firmware doesn't provide a way to
3112                  * know the initiator's LOOP ID, hence we can't find
3113                  * the session and, so, the command.
3114                  */
3115                 return -EAGAIN;
3116         } else
3117                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3118
3119         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
3120         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3121         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3122         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3123         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3124         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3125         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3126         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3127
3128         /* silence compile warning */
3129         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3130         pkt->ox_id  = cpu_to_le16(t16);
3131
3132         t16 = (atio->u.isp24.attr << 9);
3133         pkt->flags |= cpu_to_le16(t16);
3134         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3135
3136         /* Set transfer direction */
3137         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3138                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3139         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3140                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3141
3142         pkt->dseg_count = prm->tot_dsds;
3143         /* Fibre channel byte count */
3144         pkt->transfer_length = cpu_to_le32(transfer_length);
3145
3146         /* ----- CRC context -------- */
3147
3148         /* Allocate CRC context from global pool */
3149         crc_ctx_pkt = cmd->ctx =
3150             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3151
3152         if (!crc_ctx_pkt)
3153                 goto crc_queuing_error;
3154
3155         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3156         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3157
3158         /* Set handle */
3159         crc_ctx_pkt->handle = pkt->handle;
3160
3161         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3162
3163         put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3164         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
3165
3166         if (!bundling) {
3167                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd;
3168         } else {
3169                 /*
3170                  * Configure Bundling if we need to fetch interlaving
3171                  * protection PCI accesses
3172                  */
3173                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3174                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3175                 crc_ctx_pkt->u.bundling.dseg_count =
3176                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3177                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd;
3178         }
3179
3180         /* Finish the common fields of CRC pkt */
3181         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3182         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3183         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3184         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3185
3186         memset((uint8_t *)&tc, 0 , sizeof(tc));
3187         tc.vha = vha;
3188         tc.blk_sz = cmd->blk_sz;
3189         tc.bufflen = cmd->bufflen;
3190         tc.sg = cmd->sg;
3191         tc.prot_sg = cmd->prot_sg;
3192         tc.ctx = crc_ctx_pkt;
3193         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3194
3195         /* Walks data segments */
3196         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3197
3198         if (!bundling && prm->prot_seg_cnt) {
3199                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3200                         prm->tot_dsds, &tc))
3201                         goto crc_queuing_error;
3202         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3203                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3204                 goto crc_queuing_error;
3205
3206         if (bundling && prm->prot_seg_cnt) {
3207                 /* Walks dif segments */
3208                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3209
3210                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3211                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3212                         prm->prot_seg_cnt, cmd))
3213                         goto crc_queuing_error;
3214         }
3215         return QLA_SUCCESS;
3216
3217 crc_queuing_error:
3218         /* Cleanup will be performed by the caller */
3219         qpair->req->outstanding_cmds[h] = NULL;
3220
3221         return QLA_FUNCTION_FAILED;
3222 }
3223
3224 /*
3225  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3226  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3227  */
3228 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3229         uint8_t scsi_status)
3230 {
3231         struct scsi_qla_host *vha = cmd->vha;
3232         struct qla_qpair *qpair = cmd->qpair;
3233         struct ctio7_to_24xx *pkt;
3234         struct qla_tgt_prm prm;
3235         uint32_t full_req_cnt = 0;
3236         unsigned long flags = 0;
3237         int res;
3238
3239         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3240             (cmd->sess && cmd->sess->deleted)) {
3241                 cmd->state = QLA_TGT_STATE_PROCESSED;
3242                 return 0;
3243         }
3244
3245         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3246             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3247             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3248             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3249             &cmd->se_cmd, qpair->id);
3250
3251         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3252             &full_req_cnt);
3253         if (unlikely(res != 0)) {
3254                 return res;
3255         }
3256
3257         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3258
3259         if (xmit_type == QLA_TGT_XMIT_STATUS)
3260                 qpair->tgt_counters.core_qla_snd_status++;
3261         else
3262                 qpair->tgt_counters.core_qla_que_buf++;
3263
3264         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3265                 /*
3266                  * Either the port is not online or this request was from
3267                  * previous life, just abort the processing.
3268                  */
3269                 cmd->state = QLA_TGT_STATE_PROCESSED;
3270                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3271                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3272                         vha->flags.online, qla2x00_reset_active(vha),
3273                         cmd->reset_count, qpair->chip_reset);
3274                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3275                 return 0;
3276         }
3277
3278         /* Does F/W have an IOCBs for this request */
3279         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3280         if (unlikely(res))
3281                 goto out_unmap_unlock;
3282
3283         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3284                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3285         else
3286                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3287         if (unlikely(res != 0)) {
3288                 qpair->req->cnt += full_req_cnt;
3289                 goto out_unmap_unlock;
3290         }
3291
3292         pkt = (struct ctio7_to_24xx *)prm.pkt;
3293
3294         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3295                 pkt->u.status0.flags |=
3296                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3297                         CTIO7_FLAGS_STATUS_MODE_0);
3298
3299                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3300                         qlt_load_data_segments(&prm);
3301
3302                 if (prm.add_status_pkt == 0) {
3303                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3304                                 pkt->u.status0.scsi_status =
3305                                     cpu_to_le16(prm.rq_result);
3306                                 pkt->u.status0.residual =
3307                                     cpu_to_le32(prm.residual);
3308                                 pkt->u.status0.flags |= cpu_to_le16(
3309                                     CTIO7_FLAGS_SEND_STATUS);
3310                                 if (qlt_need_explicit_conf(cmd, 0)) {
3311                                         pkt->u.status0.flags |=
3312                                             cpu_to_le16(
3313                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3314                                                 CTIO7_FLAGS_CONFORM_REQ);
3315                                 }
3316                         }
3317
3318                 } else {
3319                         /*
3320                          * We have already made sure that there is sufficient
3321                          * amount of request entries to not drop HW lock in
3322                          * req_pkt().
3323                          */
3324                         struct ctio7_to_24xx *ctio =
3325                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3326                                     qpair->req);
3327
3328                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3329                             "Building additional status packet 0x%p.\n",
3330                             ctio);
3331
3332                         /*
3333                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3334                          * ctio7_to_24xx
3335                          */
3336                         memcpy(ctio, pkt, sizeof(*ctio));
3337                         /* reset back to CTIO7 */
3338                         ctio->entry_count = 1;
3339                         ctio->entry_type = CTIO_TYPE7;
3340                         ctio->dseg_count = 0;
3341                         ctio->u.status1.flags &= ~cpu_to_le16(
3342                             CTIO7_FLAGS_DATA_IN);
3343
3344                         /* Real finish is ctio_m1's finish */
3345                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3346                         pkt->u.status0.flags |= cpu_to_le16(
3347                             CTIO7_FLAGS_DONT_RET_CTIO);
3348
3349                         /* qlt_24xx_init_ctio_to_isp will correct
3350                          * all neccessary fields that's part of CTIO7.
3351                          * There should be no residual of CTIO-CRC2 data.
3352                          */
3353                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3354                             &prm);
3355                 }
3356         } else
3357                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3358
3359
3360         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3361         cmd->cmd_sent_to_fw = 1;
3362         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3363
3364         /* Memory Barrier */
3365         wmb();
3366         if (qpair->reqq_start_iocbs)
3367                 qpair->reqq_start_iocbs(qpair);
3368         else
3369                 qla2x00_start_iocbs(vha, qpair->req);
3370         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3371
3372         return 0;
3373
3374 out_unmap_unlock:
3375         qlt_unmap_sg(vha, cmd);
3376         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3377
3378         return res;
3379 }
3380 EXPORT_SYMBOL(qlt_xmit_response);
3381
3382 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3383 {
3384         struct ctio7_to_24xx *pkt;
3385         struct scsi_qla_host *vha = cmd->vha;
3386         struct qla_tgt *tgt = cmd->tgt;
3387         struct qla_tgt_prm prm;
3388         unsigned long flags = 0;
3389         int res = 0;
3390         struct qla_qpair *qpair = cmd->qpair;
3391
3392         memset(&prm, 0, sizeof(prm));
3393         prm.cmd = cmd;
3394         prm.tgt = tgt;
3395         prm.sg = NULL;
3396         prm.req_cnt = 1;
3397
3398         /* Calculate number of entries and segments required */
3399         if (qlt_pci_map_calc_cnt(&prm) != 0)
3400                 return -EAGAIN;
3401
3402         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3403             (cmd->sess && cmd->sess->deleted)) {
3404                 /*
3405                  * Either the port is not online or this request was from
3406                  * previous life, just abort the processing.
3407                  */
3408                 cmd->aborted = 1;
3409                 cmd->write_data_transferred = 0;
3410                 cmd->state = QLA_TGT_STATE_DATA_IN;
3411                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3412                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3413                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3414                         vha->flags.online, qla2x00_reset_active(vha),
3415                         cmd->reset_count, qpair->chip_reset);
3416                 return 0;
3417         }
3418
3419         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3420         /* Does F/W have an IOCBs for this request */
3421         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3422         if (res != 0)
3423                 goto out_unlock_free_unmap;
3424         if (cmd->se_cmd.prot_op)
3425                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3426         else
3427                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3428
3429         if (unlikely(res != 0)) {
3430                 qpair->req->cnt += prm.req_cnt;
3431                 goto out_unlock_free_unmap;
3432         }
3433
3434         pkt = (struct ctio7_to_24xx *)prm.pkt;
3435         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3436             CTIO7_FLAGS_STATUS_MODE_0);
3437
3438         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3439                 qlt_load_data_segments(&prm);
3440
3441         cmd->state = QLA_TGT_STATE_NEED_DATA;
3442         cmd->cmd_sent_to_fw = 1;
3443         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3444
3445         /* Memory Barrier */
3446         wmb();
3447         if (qpair->reqq_start_iocbs)
3448                 qpair->reqq_start_iocbs(qpair);
3449         else
3450                 qla2x00_start_iocbs(vha, qpair->req);
3451         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3452
3453         return res;
3454
3455 out_unlock_free_unmap:
3456         qlt_unmap_sg(vha, cmd);
3457         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3458
3459         return res;
3460 }
3461 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3462
3463
3464 /*
3465  * it is assumed either hardware_lock or qpair lock is held.
3466  */
3467 static void
3468 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3469         struct ctio_crc_from_fw *sts)
3470 {
3471         uint8_t         *ap = &sts->actual_dif[0];
3472         uint8_t         *ep = &sts->expected_dif[0];
3473         uint64_t        lba = cmd->se_cmd.t_task_lba;
3474         uint8_t scsi_status, sense_key, asc, ascq;
3475         unsigned long flags;
3476         struct scsi_qla_host *vha = cmd->vha;
3477
3478         cmd->trc_flags |= TRC_DIF_ERR;
3479
3480         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3481         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3482         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3483
3484         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3485         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3486         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3487
3488         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3489             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3490
3491         scsi_status = sense_key = asc = ascq = 0;
3492
3493         /* check appl tag */
3494         if (cmd->e_app_tag != cmd->a_app_tag) {
3495                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3496                     "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3497                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3498                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3499                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3500                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3501
3502                 cmd->dif_err_code = DIF_ERR_APP;
3503                 scsi_status = SAM_STAT_CHECK_CONDITION;
3504                 sense_key = ABORTED_COMMAND;
3505                 asc = 0x10;
3506                 ascq = 0x2;
3507         }
3508
3509         /* check ref tag */
3510         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3511                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3512                     "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard[%x|%x] cmd=%p ox_id[%04x] ",
3513                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3514                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3515                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3516                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3517
3518                 cmd->dif_err_code = DIF_ERR_REF;
3519                 scsi_status = SAM_STAT_CHECK_CONDITION;
3520                 sense_key = ABORTED_COMMAND;
3521                 asc = 0x10;
3522                 ascq = 0x3;
3523                 goto out;
3524         }
3525
3526         /* check guard */
3527         if (cmd->e_guard != cmd->a_guard) {
3528                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3529                     "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3530                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3531                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3532                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3533                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3534
3535                 cmd->dif_err_code = DIF_ERR_GRD;
3536                 scsi_status = SAM_STAT_CHECK_CONDITION;
3537                 sense_key = ABORTED_COMMAND;
3538                 asc = 0x10;
3539                 ascq = 0x1;
3540         }
3541 out:
3542         switch (cmd->state) {
3543         case QLA_TGT_STATE_NEED_DATA:
3544                 /* handle_data will load DIF error code  */
3545                 cmd->state = QLA_TGT_STATE_DATA_IN;
3546                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3547                 break;
3548         default:
3549                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3550                 if (cmd->aborted) {
3551                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3552                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3553                         break;
3554                 }
3555                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3556
3557                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3558                     ascq);
3559                 /* assume scsi status gets out on the wire.
3560                  * Will not wait for completion.
3561                  */
3562                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3563                 break;
3564         }
3565 }
3566
3567 /* If hardware_lock held on entry, might drop it, then reaquire */
3568 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3569 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3570         struct imm_ntfy_from_isp *ntfy)
3571 {
3572         struct nack_to_isp *nack;
3573         struct qla_hw_data *ha = vha->hw;
3574         request_t *pkt;
3575         int ret = 0;
3576
3577         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3578             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3579
3580         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3581         if (pkt == NULL) {
3582                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3583                     "qla_target(%d): %s failed: unable to allocate "
3584                     "request packet\n", vha->vp_idx, __func__);
3585                 return -ENOMEM;
3586         }
3587
3588         pkt->entry_type = NOTIFY_ACK_TYPE;
3589         pkt->entry_count = 1;
3590         pkt->handle = QLA_TGT_SKIP_HANDLE;
3591
3592         nack = (struct nack_to_isp *)pkt;
3593         nack->ox_id = ntfy->ox_id;
3594
3595         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3596         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3597                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3598                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3599         }
3600
3601         /* terminate */
3602         nack->u.isp24.flags |=
3603                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3604
3605         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3606         nack->u.isp24.status = ntfy->u.isp24.status;
3607         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3608         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3609         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3610         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3611         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3612         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3613
3614         qla2x00_start_iocbs(vha, vha->req);
3615         return ret;
3616 }
3617
3618 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3619         struct imm_ntfy_from_isp *imm, int ha_locked)
3620 {
3621         int rc;
3622
3623         WARN_ON_ONCE(!ha_locked);
3624         rc = __qlt_send_term_imm_notif(vha, imm);
3625         pr_debug("rc = %d\n", rc);
3626 }
3627
3628 /*
3629  * If hardware_lock held on entry, might drop it, then reaquire
3630  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3631  */
3632 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3633         struct qla_tgt_cmd *cmd,
3634         struct atio_from_isp *atio)
3635 {
3636         struct scsi_qla_host *vha = qpair->vha;
3637         struct ctio7_to_24xx *ctio24;
3638         struct qla_hw_data *ha = vha->hw;
3639         request_t *pkt;
3640         int ret = 0;
3641         uint16_t temp;
3642
3643         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3644
3645         if (cmd)
3646                 vha = cmd->vha;
3647
3648         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3649         if (pkt == NULL) {
3650                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3651                     "qla_target(%d): %s failed: unable to allocate "
3652                     "request packet\n", vha->vp_idx, __func__);
3653                 return -ENOMEM;
3654         }
3655
3656         if (cmd != NULL) {
3657                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3658                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3659                             "qla_target(%d): Terminating cmd %p with "
3660                             "incorrect state %d\n", vha->vp_idx, cmd,
3661                             cmd->state);
3662                 } else
3663                         ret = 1;
3664         }
3665
3666         qpair->tgt_counters.num_term_xchg_sent++;
3667         pkt->entry_count = 1;
3668         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3669
3670         ctio24 = (struct ctio7_to_24xx *)pkt;
3671         ctio24->entry_type = CTIO_TYPE7;
3672         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3673         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3674         ctio24->vp_index = vha->vp_idx;
3675         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3676         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3677         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3678         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3679         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3680                 CTIO7_FLAGS_TERMINATE;
3681         ctio24->u.status1.flags = cpu_to_le16(temp);
3682         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3683         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3684
3685         /* Memory Barrier */
3686         wmb();
3687         if (qpair->reqq_start_iocbs)
3688                 qpair->reqq_start_iocbs(qpair);
3689         else
3690                 qla2x00_start_iocbs(vha, qpair->req);
3691         return ret;
3692 }
3693
3694 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3695         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3696         int ul_abort)
3697 {
3698         struct scsi_qla_host *vha;
3699         unsigned long flags = 0;
3700         int rc;
3701
3702         /* why use different vha? NPIV */
3703         if (cmd)
3704                 vha = cmd->vha;
3705         else
3706                 vha = qpair->vha;
3707
3708         if (ha_locked) {
3709                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3710                 if (rc == -ENOMEM)
3711                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3712                 goto done;
3713         }
3714         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3715         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3716         if (rc == -ENOMEM)
3717                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3718
3719 done:
3720         if (cmd && !ul_abort && !cmd->aborted) {
3721                 if (cmd->sg_mapped)
3722                         qlt_unmap_sg(vha, cmd);
3723                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3724         }
3725
3726         if (!ha_locked)
3727                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3728
3729         return;
3730 }
3731
3732 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3733 {
3734         struct list_head free_list;
3735         struct qla_tgt_cmd *cmd, *tcmd;
3736
3737         vha->hw->tgt.leak_exchg_thresh_hold =
3738             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3739
3740         cmd = tcmd = NULL;
3741         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3742                 INIT_LIST_HEAD(&free_list);
3743                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3744
3745                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3746                         list_del(&cmd->cmd_list);
3747                         /* This cmd was never sent to TCM.  There is no need
3748                          * to schedule free or call free_cmd
3749                          */
3750                         qlt_free_cmd(cmd);
3751                         vha->hw->tgt.num_qfull_cmds_alloc--;
3752                 }
3753         }
3754         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3755 }
3756
3757 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3758 {
3759         uint32_t total_leaked;
3760
3761         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3762
3763         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3764             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3765
3766                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3767                     "Chip reset due to exchange starvation: %d/%d.\n",
3768                     total_leaked, vha->hw->cur_fw_xcb_count);
3769
3770                 if (IS_P3P_TYPE(vha->hw))
3771                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3772                 else
3773                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3774                 qla2xxx_wake_dpc(vha);
3775         }
3776
3777 }
3778
3779 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3780 {
3781         struct qla_tgt *tgt = cmd->tgt;
3782         struct scsi_qla_host *vha = tgt->vha;
3783         struct se_cmd *se_cmd = &cmd->se_cmd;
3784         unsigned long flags;
3785
3786         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3787             "qla_target(%d): terminating exchange for aborted cmd=%p "
3788             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3789             se_cmd->tag);
3790
3791         spin_lock_irqsave(&cmd->cmd_lock, flags);
3792         if (cmd->aborted) {
3793                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3794                 /*
3795                  * It's normal to see 2 calls in this path:
3796                  *  1) XFER Rdy completion + CMD_T_ABORT
3797                  *  2) TCM TMR - drain_state_list
3798                  */
3799                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3800                     "multiple abort. %p transport_state %x, t_state %x, "
3801                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3802                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3803                 return EIO;
3804         }
3805         cmd->aborted = 1;
3806         cmd->trc_flags |= TRC_ABORT;
3807         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3808
3809         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3810         return 0;
3811 }
3812 EXPORT_SYMBOL(qlt_abort_cmd);
3813
3814 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3815 {
3816         struct fc_port *sess = cmd->sess;
3817
3818         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3819             "%s: se_cmd[%p] ox_id %04x\n",
3820             __func__, &cmd->se_cmd,
3821             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3822
3823         BUG_ON(cmd->cmd_in_wq);
3824
3825         if (cmd->sg_mapped)
3826                 qlt_unmap_sg(cmd->vha, cmd);
3827
3828         if (!cmd->q_full)
3829                 qlt_decr_num_pend_cmds(cmd->vha);
3830
3831         BUG_ON(cmd->sg_mapped);
3832         cmd->jiffies_at_free = get_jiffies_64();
3833         if (unlikely(cmd->free_sg))
3834                 kfree(cmd->sg);
3835
3836         if (!sess || !sess->se_sess) {
3837                 WARN_ON(1);
3838                 return;
3839         }
3840         cmd->jiffies_at_free = get_jiffies_64();
3841         target_free_tag(sess->se_sess, &cmd->se_cmd);
3842 }
3843 EXPORT_SYMBOL(qlt_free_cmd);
3844
3845 /*
3846  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3847  */
3848 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3849         struct qla_tgt_cmd *cmd, uint32_t status)
3850 {
3851         int term = 0;
3852         struct scsi_qla_host *vha = qpair->vha;
3853
3854         if (cmd->se_cmd.prot_op)
3855                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3856                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3857                     "se_cmd=%p tag[%x] op %#x/%s",
3858                      cmd->lba, cmd->lba,
3859                      cmd->num_blks, &cmd->se_cmd,
3860                      cmd->atio.u.isp24.exchange_addr,
3861                      cmd->se_cmd.prot_op,
3862                      prot_op_str(cmd->se_cmd.prot_op));
3863
3864         if (ctio != NULL) {
3865                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3866
3867                 term = !(c->flags &
3868                     cpu_to_le16(OF_TERM_EXCH));
3869         } else
3870                 term = 1;
3871
3872         if (term)
3873                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3874
3875         return term;
3876 }
3877
3878
3879 /* ha->hardware_lock supposed to be held on entry */
3880 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3881         struct rsp_que *rsp, uint32_t handle, void *ctio)
3882 {
3883         void *cmd = NULL;
3884         struct req_que *req;
3885         int qid = GET_QID(handle);
3886         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3887
3888         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3889                 return NULL;
3890
3891         if (qid == rsp->req->id) {
3892                 req = rsp->req;
3893         } else if (vha->hw->req_q_map[qid]) {
3894                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3895                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3896                     vha->vp_idx, rsp->id, handle);
3897                 req = vha->hw->req_q_map[qid];
3898         } else {
3899                 return NULL;
3900         }
3901
3902         h &= QLA_CMD_HANDLE_MASK;
3903
3904         if (h != QLA_TGT_NULL_HANDLE) {
3905                 if (unlikely(h >= req->num_outstanding_cmds)) {
3906                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3907                             "qla_target(%d): Wrong handle %x received\n",
3908                             vha->vp_idx, handle);
3909                         return NULL;
3910                 }
3911
3912                 cmd = (void *) req->outstanding_cmds[h];
3913                 if (unlikely(cmd == NULL)) {
3914                         ql_dbg(ql_dbg_async, vha, 0xe053,
3915                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3916                                 vha->vp_idx, handle, req->id, rsp->id);
3917                         return NULL;
3918                 }
3919                 req->outstanding_cmds[h] = NULL;
3920         } else if (ctio != NULL) {
3921                 /* We can't get loop ID from CTIO7 */
3922                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3923                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3924                     "support NULL handles\n", vha->vp_idx);
3925                 return NULL;
3926         }
3927
3928         return cmd;
3929 }
3930
3931 /*
3932  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3933  */
3934 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3935     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3936 {
3937         struct qla_hw_data *ha = vha->hw;
3938         struct se_cmd *se_cmd;
3939         struct qla_tgt_cmd *cmd;
3940         struct qla_qpair *qpair = rsp->qpair;
3941
3942         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3943                 /* That could happen only in case of an error/reset/abort */
3944                 if (status != CTIO_SUCCESS) {
3945                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3946                             "Intermediate CTIO received"
3947                             " (status %x)\n", status);
3948                 }
3949                 return;
3950         }
3951
3952         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3953         if (cmd == NULL)
3954                 return;
3955
3956         se_cmd = &cmd->se_cmd;
3957         cmd->cmd_sent_to_fw = 0;
3958
3959         qlt_unmap_sg(vha, cmd);
3960
3961         if (unlikely(status != CTIO_SUCCESS)) {
3962                 switch (status & 0xFFFF) {
3963                 case CTIO_INVALID_RX_ID:
3964                         if (printk_ratelimit())
3965                                 dev_info(&vha->hw->pdev->dev,
3966                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
3967                                     vha->vp_idx, cmd->atio.u.isp24.attr,
3968                                     ((cmd->ctio_flags >> 9) & 0xf),
3969                                     cmd->ctio_flags);
3970
3971                         break;
3972                 case CTIO_LIP_RESET:
3973                 case CTIO_TARGET_RESET:
3974                 case CTIO_ABORTED:
3975                         /* driver request abort via Terminate exchange */
3976                 case CTIO_TIMEOUT:
3977                         /* They are OK */
3978                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3979                             "qla_target(%d): CTIO with "
3980                             "status %#x received, state %x, se_cmd %p, "
3981                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3982                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3983                             status, cmd->state, se_cmd);
3984                         break;
3985
3986                 case CTIO_PORT_LOGGED_OUT:
3987                 case CTIO_PORT_UNAVAILABLE:
3988                 {
3989                         int logged_out =
3990                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3991
3992                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3993                             "qla_target(%d): CTIO with %s status %x "
3994                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3995                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3996                             status, cmd->state, se_cmd);
3997
3998                         if (logged_out && cmd->sess) {
3999                                 /*
4000                                  * Session is already logged out, but we need
4001                                  * to notify initiator, who's not aware of this
4002                                  */
4003                                 cmd->sess->send_els_logo = 1;
4004                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
4005                                     "%s %d %8phC post del sess\n",
4006                                     __func__, __LINE__, cmd->sess->port_name);
4007
4008                                 qlt_schedule_sess_for_deletion(cmd->sess);
4009                         }
4010                         break;
4011                 }
4012                 case CTIO_DIF_ERROR: {
4013                         struct ctio_crc_from_fw *crc =
4014                                 (struct ctio_crc_from_fw *)ctio;
4015                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
4016                             "qla_target(%d): CTIO with DIF_ERROR status %x "
4017                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
4018                             "expect_dif[0x%llx]\n",
4019                             vha->vp_idx, status, cmd->state, se_cmd,
4020                             *((u64 *)&crc->actual_dif[0]),
4021                             *((u64 *)&crc->expected_dif[0]));
4022
4023                         qlt_handle_dif_error(qpair, cmd, ctio);
4024                         return;
4025                 }
4026                 default:
4027                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4028                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4029                             vha->vp_idx, status, cmd->state, se_cmd);
4030                         break;
4031                 }
4032
4033
4034                 /* "cmd->aborted" means
4035                  * cmd is already aborted/terminated, we don't
4036                  * need to terminate again.  The exchange is already
4037                  * cleaned up/freed at FW level.  Just cleanup at driver
4038                  * level.
4039                  */
4040                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4041                     (!cmd->aborted)) {
4042                         cmd->trc_flags |= TRC_CTIO_ERR;
4043                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4044                                 return;
4045                 }
4046         }
4047
4048         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4049                 cmd->trc_flags |= TRC_CTIO_DONE;
4050         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4051                 cmd->state = QLA_TGT_STATE_DATA_IN;
4052
4053                 if (status == CTIO_SUCCESS)
4054                         cmd->write_data_transferred = 1;
4055
4056                 ha->tgt.tgt_ops->handle_data(cmd);
4057                 return;
4058         } else if (cmd->aborted) {
4059                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4060                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4061                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4062         } else {
4063                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4064                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4065                     "qla_target(%d): A command in state (%d) should "
4066                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4067         }
4068
4069         if (unlikely(status != CTIO_SUCCESS) &&
4070                 !cmd->aborted) {
4071                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4072                 dump_stack();
4073         }
4074
4075         ha->tgt.tgt_ops->free_cmd(cmd);
4076 }
4077
4078 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4079         uint8_t task_codes)
4080 {
4081         int fcp_task_attr;
4082
4083         switch (task_codes) {
4084         case ATIO_SIMPLE_QUEUE:
4085                 fcp_task_attr = TCM_SIMPLE_TAG;
4086                 break;
4087         case ATIO_HEAD_OF_QUEUE:
4088                 fcp_task_attr = TCM_HEAD_TAG;
4089                 break;
4090         case ATIO_ORDERED_QUEUE:
4091                 fcp_task_attr = TCM_ORDERED_TAG;
4092                 break;
4093         case ATIO_ACA_QUEUE:
4094                 fcp_task_attr = TCM_ACA_TAG;
4095                 break;
4096         case ATIO_UNTAGGED:
4097                 fcp_task_attr = TCM_SIMPLE_TAG;
4098                 break;
4099         default:
4100                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4101                     "qla_target: unknown task code %x, use ORDERED instead\n",
4102                     task_codes);
4103                 fcp_task_attr = TCM_ORDERED_TAG;
4104                 break;
4105         }
4106
4107         return fcp_task_attr;
4108 }
4109
4110 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
4111                                         uint8_t *);
4112 /*
4113  * Process context for I/O path into tcm_qla2xxx code
4114  */
4115 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4116 {
4117         scsi_qla_host_t *vha = cmd->vha;
4118         struct qla_hw_data *ha = vha->hw;
4119         struct fc_port *sess = cmd->sess;
4120         struct atio_from_isp *atio = &cmd->atio;
4121         unsigned char *cdb;
4122         unsigned long flags;
4123         uint32_t data_length;
4124         int ret, fcp_task_attr, data_dir, bidi = 0;
4125         struct qla_qpair *qpair = cmd->qpair;
4126
4127         cmd->cmd_in_wq = 0;
4128         cmd->trc_flags |= TRC_DO_WORK;
4129
4130         if (cmd->aborted) {
4131                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4132                     "cmd with tag %u is aborted\n",
4133                     cmd->atio.u.isp24.exchange_addr);
4134                 goto out_term;
4135         }
4136
4137         spin_lock_init(&cmd->cmd_lock);
4138         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4139         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4140
4141         if (atio->u.isp24.fcp_cmnd.rddata &&
4142             atio->u.isp24.fcp_cmnd.wrdata) {
4143                 bidi = 1;
4144                 data_dir = DMA_TO_DEVICE;
4145         } else if (atio->u.isp24.fcp_cmnd.rddata)
4146                 data_dir = DMA_FROM_DEVICE;
4147         else if (atio->u.isp24.fcp_cmnd.wrdata)
4148                 data_dir = DMA_TO_DEVICE;
4149         else
4150                 data_dir = DMA_NONE;
4151
4152         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4153             atio->u.isp24.fcp_cmnd.task_attr);
4154         data_length = get_datalen_for_atio(atio);
4155
4156         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4157                                           fcp_task_attr, data_dir, bidi);
4158         if (ret != 0)
4159                 goto out_term;
4160         /*
4161          * Drop extra session reference from qlt_handle_cmd_for_atio().
4162          */
4163         ha->tgt.tgt_ops->put_sess(sess);
4164         return;
4165
4166 out_term:
4167         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4168         /*
4169          * cmd has not sent to target yet, so pass NULL as the second
4170          * argument to qlt_send_term_exchange() and free the memory here.
4171          */
4172         cmd->trc_flags |= TRC_DO_WORK_ERR;
4173         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4174         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4175
4176         qlt_decr_num_pend_cmds(vha);
4177         target_free_tag(sess->se_sess, &cmd->se_cmd);
4178         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4179
4180         ha->tgt.tgt_ops->put_sess(sess);
4181 }
4182
4183 static void qlt_do_work(struct work_struct *work)
4184 {
4185         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4186         scsi_qla_host_t *vha = cmd->vha;
4187         unsigned long flags;
4188
4189         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4190         list_del(&cmd->cmd_list);
4191         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4192
4193         __qlt_do_work(cmd);
4194 }
4195
4196 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4197 {
4198         unsigned long flags;
4199         struct qla_hw_data *ha = vha->hw;
4200         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4201         void *node;
4202         u64 key = 0;
4203
4204         ql_log(ql_log_info, vha, 0x706c,
4205             "User update Number of Active Qpairs %d\n",
4206             ha->tgt.num_act_qpairs);
4207
4208         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4209
4210         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4211                 btree_remove64(&tgt->lun_qpair_map, key);
4212
4213         ha->base_qpair->lun_cnt = 0;
4214         for (key = 0; key < ha->max_qpairs; key++)
4215                 if (ha->queue_pair_map[key])
4216                         ha->queue_pair_map[key]->lun_cnt = 0;
4217
4218         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4219 }
4220
4221 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4222         struct qla_tgt_cmd *cmd)
4223 {
4224         struct qla_qpair *qpair, *qp;
4225         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4226         struct qla_qpair_hint *h;
4227
4228         if (vha->flags.qpairs_available) {
4229                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4230                 if (unlikely(!h)) {
4231                         /* spread lun to qpair ratio evently */
4232                         int lcnt = 0, rc;
4233                         struct scsi_qla_host *base_vha =
4234                                 pci_get_drvdata(vha->hw->pdev);
4235
4236                         qpair = vha->hw->base_qpair;
4237                         if (qpair->lun_cnt == 0) {
4238                                 qpair->lun_cnt++;
4239                                 h = qla_qpair_to_hint(tgt, qpair);
4240                                 BUG_ON(!h);
4241                                 rc = btree_insert64(&tgt->lun_qpair_map,
4242                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4243                                 if (rc) {
4244                                         qpair->lun_cnt--;
4245                                         ql_log(ql_log_info, vha, 0xd037,
4246                                             "Unable to insert lun %llx into lun_qpair_map\n",
4247                                             cmd->unpacked_lun);
4248                                 }
4249                                 goto out;
4250                         } else {
4251                                 lcnt = qpair->lun_cnt;
4252                         }
4253
4254                         h = NULL;
4255                         list_for_each_entry(qp, &base_vha->qp_list,
4256                             qp_list_elem) {
4257                                 if (qp->lun_cnt == 0) {
4258                                         qp->lun_cnt++;
4259                                         h = qla_qpair_to_hint(tgt, qp);
4260                                         BUG_ON(!h);
4261                                         rc = btree_insert64(&tgt->lun_qpair_map,
4262                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4263                                         if (rc) {
4264                                                 qp->lun_cnt--;
4265                                                 ql_log(ql_log_info, vha, 0xd038,
4266                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4267                                                         cmd->unpacked_lun);
4268                                         }
4269                                         qpair = qp;
4270                                         goto out;
4271                                 } else {
4272                                         if (qp->lun_cnt < lcnt) {
4273                                                 lcnt = qp->lun_cnt;
4274                                                 qpair = qp;
4275                                                 continue;
4276                                         }
4277                                 }
4278                         }
4279                         BUG_ON(!qpair);
4280                         qpair->lun_cnt++;
4281                         h = qla_qpair_to_hint(tgt, qpair);
4282                         BUG_ON(!h);
4283                         rc = btree_insert64(&tgt->lun_qpair_map,
4284                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4285                         if (rc) {
4286                                 qpair->lun_cnt--;
4287                                 ql_log(ql_log_info, vha, 0xd039,
4288                                    "Unable to insert lun %llx into lun_qpair_map\n",
4289                                    cmd->unpacked_lun);
4290                         }
4291                 }
4292         } else {
4293                 h = &tgt->qphints[0];
4294         }
4295 out:
4296         cmd->qpair = h->qpair;
4297         cmd->se_cmd.cpuid = h->cpuid;
4298 }
4299
4300 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4301                                        struct fc_port *sess,
4302                                        struct atio_from_isp *atio)
4303 {
4304         struct se_session *se_sess = sess->se_sess;
4305         struct qla_tgt_cmd *cmd;
4306         int tag, cpu;
4307
4308         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
4309         if (tag < 0)
4310                 return NULL;
4311
4312         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4313         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4314         cmd->cmd_type = TYPE_TGT_CMD;
4315         memcpy(&cmd->atio, atio, sizeof(*atio));
4316         cmd->state = QLA_TGT_STATE_NEW;
4317         cmd->tgt = vha->vha_tgt.qla_tgt;
4318         qlt_incr_num_pend_cmds(vha);
4319         cmd->vha = vha;
4320         cmd->se_cmd.map_tag = tag;
4321         cmd->se_cmd.map_cpu = cpu;
4322         cmd->sess = sess;
4323         cmd->loop_id = sess->loop_id;
4324         cmd->conf_compl_supported = sess->conf_compl_supported;
4325
4326         cmd->trc_flags = 0;
4327         cmd->jiffies_at_alloc = get_jiffies_64();
4328
4329         cmd->unpacked_lun = scsilun_to_int(
4330             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4331         qlt_assign_qpair(vha, cmd);
4332         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4333         cmd->vp_idx = vha->vp_idx;
4334
4335         return cmd;
4336 }
4337
4338 /* ha->hardware_lock supposed to be held on entry */
4339 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4340         struct atio_from_isp *atio)
4341 {
4342         struct qla_hw_data *ha = vha->hw;
4343         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4344         struct fc_port *sess;
4345         struct qla_tgt_cmd *cmd;
4346         unsigned long flags;
4347         port_id_t id;
4348
4349         if (unlikely(tgt->tgt_stop)) {
4350                 ql_dbg(ql_dbg_io, vha, 0x3061,
4351                     "New command while device %p is shutting down\n", tgt);
4352                 return -ENODEV;
4353         }
4354
4355         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
4356         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
4357         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
4358         if (IS_SW_RESV_ADDR(id))
4359                 return -EBUSY;
4360
4361         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4362         if (unlikely(!sess))
4363                 return -EFAULT;
4364
4365         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4366          * session deletion, but it's still in sess_del_work wq */
4367         if (sess->deleted) {
4368                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4369                     "New command while old session %p is being deleted\n",
4370                     sess);
4371                 return -EFAULT;
4372         }
4373
4374         /*
4375          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4376          */
4377         if (!kref_get_unless_zero(&sess->sess_kref)) {
4378                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4379                     "%s: kref_get fail, %8phC oxid %x \n",
4380                     __func__, sess->port_name,
4381                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4382                 return -EFAULT;
4383         }
4384
4385         cmd = qlt_get_tag(vha, sess, atio);
4386         if (!cmd) {
4387                 ql_dbg(ql_dbg_io, vha, 0x3062,
4388                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4389                 ha->tgt.tgt_ops->put_sess(sess);
4390                 return -EBUSY;
4391         }
4392
4393         cmd->cmd_in_wq = 1;
4394         cmd->trc_flags |= TRC_NEW_CMD;
4395
4396         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4397         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4398         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4399
4400         INIT_WORK(&cmd->work, qlt_do_work);
4401         if (vha->flags.qpairs_available) {
4402                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4403         } else if (ha->msix_count) {
4404                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4405                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4406                             &cmd->work);
4407                 else
4408                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4409                             &cmd->work);
4410         } else {
4411                 queue_work(qla_tgt_wq, &cmd->work);
4412         }
4413
4414         return 0;
4415 }
4416
4417 /* ha->hardware_lock supposed to be held on entry */
4418 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4419         int fn, void *iocb, int flags)
4420 {
4421         struct scsi_qla_host *vha = sess->vha;
4422         struct qla_hw_data *ha = vha->hw;
4423         struct qla_tgt_mgmt_cmd *mcmd;
4424         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4425         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4426
4427         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4428         if (!mcmd) {
4429                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4430                     "qla_target(%d): Allocation of management "
4431                     "command failed, some commands and their data could "
4432                     "leak\n", vha->vp_idx);
4433                 return -ENOMEM;
4434         }
4435         memset(mcmd, 0, sizeof(*mcmd));
4436         mcmd->sess = sess;
4437
4438         if (iocb) {
4439                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4440                     sizeof(mcmd->orig_iocb.imm_ntfy));
4441         }
4442         mcmd->tmr_func = fn;
4443         mcmd->flags = flags;
4444         mcmd->reset_count = ha->base_qpair->chip_reset;
4445         mcmd->qpair = h->qpair;
4446         mcmd->vha = vha;
4447         mcmd->se_cmd.cpuid = h->cpuid;
4448         mcmd->unpacked_lun = lun;
4449
4450         switch (fn) {
4451         case QLA_TGT_LUN_RESET:
4452         case QLA_TGT_CLEAR_TS:
4453         case QLA_TGT_ABORT_TS:
4454                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4455                 /* fall through */
4456         case QLA_TGT_CLEAR_ACA:
4457                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4458                 mcmd->qpair = h->qpair;
4459                 mcmd->se_cmd.cpuid = h->cpuid;
4460                 break;
4461
4462         case QLA_TGT_TARGET_RESET:
4463         case QLA_TGT_NEXUS_LOSS_SESS:
4464         case QLA_TGT_NEXUS_LOSS:
4465         case QLA_TGT_ABORT_ALL:
4466         default:
4467                 /* no-op */
4468                 break;
4469         }
4470
4471         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4472         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4473             &mcmd->work);
4474
4475         return 0;
4476 }
4477
4478 /* ha->hardware_lock supposed to be held on entry */
4479 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4480 {
4481         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4482         struct qla_hw_data *ha = vha->hw;
4483         struct fc_port *sess;
4484         u64 unpacked_lun;
4485         int fn;
4486         unsigned long flags;
4487
4488         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4489
4490         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4491         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4492             a->u.isp24.fcp_hdr.s_id);
4493         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4494
4495         unpacked_lun =
4496             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4497
4498         if (sess == NULL || sess->deleted)
4499                 return -EFAULT;
4500
4501         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4502 }
4503
4504 /* ha->hardware_lock supposed to be held on entry */
4505 static int __qlt_abort_task(struct scsi_qla_host *vha,
4506         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4507 {
4508         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4509         struct qla_hw_data *ha = vha->hw;
4510         struct qla_tgt_mgmt_cmd *mcmd;
4511         u64 unpacked_lun;
4512         int rc;
4513
4514         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4515         if (mcmd == NULL) {
4516                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4517                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4518                     vha->vp_idx, __func__);
4519                 return -ENOMEM;
4520         }
4521         memset(mcmd, 0, sizeof(*mcmd));
4522
4523         mcmd->sess = sess;
4524         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4525             sizeof(mcmd->orig_iocb.imm_ntfy));
4526
4527         unpacked_lun =
4528             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4529         mcmd->reset_count = ha->base_qpair->chip_reset;
4530         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4531         mcmd->qpair = ha->base_qpair;
4532
4533         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4534             le16_to_cpu(iocb->u.isp2x.seq_id));
4535         if (rc != 0) {
4536                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4537                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4538                     vha->vp_idx, rc);
4539                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4540                 return -EFAULT;
4541         }
4542
4543         return 0;
4544 }
4545
4546 /* ha->hardware_lock supposed to be held on entry */
4547 static int qlt_abort_task(struct scsi_qla_host *vha,
4548         struct imm_ntfy_from_isp *iocb)
4549 {
4550         struct qla_hw_data *ha = vha->hw;
4551         struct fc_port *sess;
4552         int loop_id;
4553         unsigned long flags;
4554
4555         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4556
4557         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4558         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4559         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4560
4561         if (sess == NULL) {
4562                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4563                     "qla_target(%d): task abort for unexisting "
4564                     "session\n", vha->vp_idx);
4565                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4566                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4567         }
4568
4569         return __qlt_abort_task(vha, iocb, sess);
4570 }
4571
4572 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4573 {
4574         if (rc != MBS_COMMAND_COMPLETE) {
4575                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4576                         "%s: se_sess %p / sess %p from"
4577                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4578                         " LOGO failed: %#x\n",
4579                         __func__,
4580                         fcport->se_sess,
4581                         fcport,
4582                         fcport->port_name, fcport->loop_id,
4583                         fcport->d_id.b.domain, fcport->d_id.b.area,
4584                         fcport->d_id.b.al_pa, rc);
4585         }
4586
4587         fcport->logout_completed = 1;
4588 }
4589
4590 /*
4591 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4592 *
4593 * Schedules sessions with matching port_id/loop_id but different wwn for
4594 * deletion. Returns existing session with matching wwn if present.
4595 * Null otherwise.
4596 */
4597 struct fc_port *
4598 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4599     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4600 {
4601         struct fc_port *sess = NULL, *other_sess;
4602         uint64_t other_wwn;
4603
4604         *conflict_sess = NULL;
4605
4606         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4607
4608                 other_wwn = wwn_to_u64(other_sess->port_name);
4609
4610                 if (wwn == other_wwn) {
4611                         WARN_ON(sess);
4612                         sess = other_sess;
4613                         continue;
4614                 }
4615
4616                 /* find other sess with nport_id collision */
4617                 if (port_id.b24 == other_sess->d_id.b24) {
4618                         if (loop_id != other_sess->loop_id) {
4619                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4620                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4621                                     other_sess, other_sess->loop_id, other_wwn);
4622
4623                                 /*
4624                                  * logout_on_delete is set by default, but another
4625                                  * session that has the same s_id/loop_id combo
4626                                  * might have cleared it when requested this session
4627                                  * deletion, so don't touch it
4628                                  */
4629                                 qlt_schedule_sess_for_deletion(other_sess);
4630                         } else {
4631                                 /*
4632                                  * Another wwn used to have our s_id/loop_id
4633                                  * kill the session, but don't free the loop_id
4634                                  */
4635                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4636                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4637                                     other_sess, other_sess->loop_id, other_wwn);
4638
4639                                 other_sess->keep_nport_handle = 1;
4640                                 if (other_sess->disc_state != DSC_DELETED)
4641                                         *conflict_sess = other_sess;
4642                                 qlt_schedule_sess_for_deletion(other_sess);
4643                         }
4644                         continue;
4645                 }
4646
4647                 /* find other sess with nport handle collision */
4648                 if ((loop_id == other_sess->loop_id) &&
4649                         (loop_id != FC_NO_LOOP_ID)) {
4650                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4651                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4652                                other_sess, other_sess->loop_id, other_wwn);
4653
4654                         /* Same loop_id but different s_id
4655                          * Ok to kill and logout */
4656                         qlt_schedule_sess_for_deletion(other_sess);
4657                 }
4658         }
4659
4660         return sess;
4661 }
4662
4663 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4664 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4665 {
4666         struct qla_tgt_sess_op *op;
4667         struct qla_tgt_cmd *cmd;
4668         uint32_t key;
4669         int count = 0;
4670         unsigned long flags;
4671
4672         key = (((u32)s_id->b.domain << 16) |
4673                ((u32)s_id->b.area   <<  8) |
4674                ((u32)s_id->b.al_pa));
4675
4676         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4677         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4678                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4679
4680                 if (op_key == key) {
4681                         op->aborted = true;
4682                         count++;
4683                 }
4684         }
4685
4686         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4687                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4688
4689                 if (op_key == key) {
4690                         op->aborted = true;
4691                         count++;
4692                 }
4693         }
4694
4695         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4696                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4697
4698                 if (cmd_key == key) {
4699                         cmd->aborted = 1;
4700                         count++;
4701                 }
4702         }
4703         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4704
4705         return count;
4706 }
4707
4708 static int qlt_handle_login(struct scsi_qla_host *vha,
4709     struct imm_ntfy_from_isp *iocb)
4710 {
4711         struct fc_port *sess = NULL, *conflict_sess = NULL;
4712         uint64_t wwn;
4713         port_id_t port_id;
4714         uint16_t loop_id, wd3_lo;
4715         int res = 0;
4716         struct qlt_plogi_ack_t *pla;
4717         unsigned long flags;
4718
4719         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4720
4721         port_id.b.domain = iocb->u.isp24.port_id[2];
4722         port_id.b.area   = iocb->u.isp24.port_id[1];
4723         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4724         port_id.b.rsvd_1 = 0;
4725
4726         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4727
4728         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4729         abort_cmds_for_s_id(vha, &port_id);
4730
4731         if (wwn) {
4732                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4733                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4734                     port_id, loop_id, &conflict_sess);
4735                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4736         } else {
4737                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4738                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4739                     __func__, __LINE__, loop_id, port_id.b24);
4740                 qlt_send_term_imm_notif(vha, iocb, 1);
4741                 goto out;
4742         }
4743
4744         if (IS_SW_RESV_ADDR(port_id)) {
4745                 res = 1;
4746                 goto out;
4747         }
4748
4749         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4750         if (!pla) {
4751                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4752                     "%s %d %8phC Term INOT due to mem alloc fail",
4753                     __func__, __LINE__,
4754                     iocb->u.isp24.port_name);
4755                 qlt_send_term_imm_notif(vha, iocb, 1);
4756                 goto out;
4757         }
4758
4759         if (conflict_sess) {
4760                 conflict_sess->login_gen++;
4761                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4762                     QLT_PLOGI_LINK_CONFLICT);
4763         }
4764
4765         if (!sess) {
4766                 pla->ref_count++;
4767                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4768                     "%s %d %8phC post new sess\n",
4769                     __func__, __LINE__, iocb->u.isp24.port_name);
4770                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4771                         qla24xx_post_newsess_work(vha, &port_id,
4772                             iocb->u.isp24.port_name,
4773                             iocb->u.isp24.u.plogi.node_name,
4774                             pla, FC4_TYPE_UNKNOWN);
4775                 else
4776                         qla24xx_post_newsess_work(vha, &port_id,
4777                             iocb->u.isp24.port_name, NULL,
4778                             pla, FC4_TYPE_UNKNOWN);
4779
4780                 goto out;
4781         }
4782
4783         if (sess->disc_state == DSC_UPD_FCPORT) {
4784                 u16 sec;
4785
4786                 /*
4787                  * Remote port registration is still going on from
4788                  * previous login. Allow it to finish before we
4789                  * accept the new login.
4790                  */
4791                 sess->next_disc_state = DSC_DELETE_PEND;
4792                 sec = jiffies_to_msecs(jiffies -
4793                     sess->jiffies_at_registration) / 1000;
4794                 if (sess->sec_since_registration < sec && sec &&
4795                     !(sec % 5)) {
4796                         sess->sec_since_registration = sec;
4797                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4798                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4799                             __func__, sess->port_name, sec);
4800                 }
4801
4802                 if (!conflict_sess)
4803                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4804
4805                 qlt_send_term_imm_notif(vha, iocb, 1);
4806                 goto out;
4807         }
4808
4809         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4810         sess->d_id = port_id;
4811         sess->login_gen++;
4812
4813         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4814                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4815                 sess->local = 0;
4816                 sess->loop_id = loop_id;
4817                 sess->d_id = port_id;
4818                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4819                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4820
4821                 if (wd3_lo & BIT_7)
4822                         sess->conf_compl_supported = 1;
4823
4824                 if ((wd3_lo & BIT_4) == 0)
4825                         sess->port_type = FCT_INITIATOR;
4826                 else
4827                         sess->port_type = FCT_TARGET;
4828
4829         } else
4830                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4831
4832
4833         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4834             "%s %d %8phC  DS %d\n",
4835             __func__, __LINE__, sess->port_name, sess->disc_state);
4836
4837         switch (sess->disc_state) {
4838         case DSC_DELETED:
4839                 qlt_plogi_ack_unref(vha, pla);
4840                 break;
4841
4842         default:
4843                 /*
4844                  * Under normal circumstances we want to release nport handle
4845                  * during LOGO process to avoid nport handle leaks inside FW.
4846                  * The exception is when LOGO is done while another PLOGI with
4847                  * the same nport handle is waiting as might be the case here.
4848                  * Note: there is always a possibily of a race where session
4849                  * deletion has already started for other reasons (e.g. ACL
4850                  * removal) and now PLOGI arrives:
4851                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4852                  *    FW must have assigned this PLOGI a new/same handle and we
4853                  *    can proceed ACK'ing it as usual when session deletion
4854                  *    completes.
4855                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4856                  *    bit reached it, the handle has now been released. We'll
4857                  *    get an error when we ACK this PLOGI. Nothing will be sent
4858                  *    back to initiator. Initiator should eventually retry
4859                  *    PLOGI and situation will correct itself.
4860                  */
4861                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4862                     (sess->d_id.b24 == port_id.b24));
4863
4864                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4865                     "%s %d %8phC post del sess\n",
4866                     __func__, __LINE__, sess->port_name);
4867
4868
4869                 qlt_schedule_sess_for_deletion(sess);
4870                 break;
4871         }
4872 out:
4873         return res;
4874 }
4875
4876 /*
4877  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4878  */
4879 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4880         struct imm_ntfy_from_isp *iocb)
4881 {
4882         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4883         struct qla_hw_data *ha = vha->hw;
4884         struct fc_port *sess = NULL, *conflict_sess = NULL;
4885         uint64_t wwn;
4886         port_id_t port_id;
4887         uint16_t loop_id;
4888         uint16_t wd3_lo;
4889         int res = 0;
4890         unsigned long flags;
4891
4892         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4893
4894         port_id.b.domain = iocb->u.isp24.port_id[2];
4895         port_id.b.area   = iocb->u.isp24.port_id[1];
4896         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4897         port_id.b.rsvd_1 = 0;
4898
4899         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4900
4901         ql_dbg(ql_dbg_disc, vha, 0xf026,
4902             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4903             vha->vp_idx, iocb->u.isp24.port_id[2],
4904                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4905                    iocb->u.isp24.status_subcode, loop_id,
4906                 iocb->u.isp24.port_name);
4907
4908         /* res = 1 means ack at the end of thread
4909          * res = 0 means ack async/later.
4910          */
4911         switch (iocb->u.isp24.status_subcode) {
4912         case ELS_PLOGI:
4913                 res = qlt_handle_login(vha, iocb);
4914                 break;
4915
4916         case ELS_PRLI:
4917                 if (N2N_TOPO(ha)) {
4918                         sess = qla2x00_find_fcport_by_wwpn(vha,
4919                             iocb->u.isp24.port_name, 1);
4920
4921                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4922                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4923                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4924                                     __func__, __LINE__,
4925                                     iocb->u.isp24.port_name);
4926                                 qlt_send_term_imm_notif(vha, iocb, 1);
4927                                 break;
4928                         }
4929
4930                         res = qlt_handle_login(vha, iocb);
4931                         break;
4932                 }
4933
4934                 if (IS_SW_RESV_ADDR(port_id)) {
4935                         res = 1;
4936                         break;
4937                 }
4938
4939                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4940
4941                 if (wwn) {
4942                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4943                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4944                                 loop_id, &conflict_sess);
4945                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4946                 }
4947
4948                 if (conflict_sess) {
4949                         switch (conflict_sess->disc_state) {
4950                         case DSC_DELETED:
4951                         case DSC_DELETE_PEND:
4952                                 break;
4953                         default:
4954                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4955                                     "PRLI with conflicting sess %p port %8phC\n",
4956                                     conflict_sess, conflict_sess->port_name);
4957                                 conflict_sess->fw_login_state =
4958                                     DSC_LS_PORT_UNAVAIL;
4959                                 qlt_send_term_imm_notif(vha, iocb, 1);
4960                                 res = 0;
4961                                 break;
4962                         }
4963                 }
4964
4965                 if (sess != NULL) {
4966                         bool delete = false;
4967                         int sec;
4968
4969                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4970                         switch (sess->fw_login_state) {
4971                         case DSC_LS_PLOGI_PEND:
4972                         case DSC_LS_PLOGI_COMP:
4973                         case DSC_LS_PRLI_COMP:
4974                                 break;
4975                         default:
4976                                 delete = true;
4977                                 break;
4978                         }
4979
4980                         switch (sess->disc_state) {
4981                         case DSC_UPD_FCPORT:
4982                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4983                                     flags);
4984
4985                                 sec = jiffies_to_msecs(jiffies -
4986                                     sess->jiffies_at_registration)/1000;
4987                                 if (sess->sec_since_registration < sec && sec &&
4988                                     !(sec % 5)) {
4989                                         sess->sec_since_registration = sec;
4990                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
4991                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
4992                                             __func__, sess->port_name, sec);
4993                                 }
4994                                 qlt_send_term_imm_notif(vha, iocb, 1);
4995                                 return 0;
4996
4997                         case DSC_LOGIN_PEND:
4998                         case DSC_GPDB:
4999                         case DSC_LOGIN_COMPLETE:
5000                         case DSC_ADISC:
5001                                 delete = false;
5002                                 break;
5003                         default:
5004                                 break;
5005                         }
5006
5007                         if (delete) {
5008                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5009                                     flags);
5010                                 /*
5011                                  * Impatient initiator sent PRLI before last
5012                                  * PLOGI could finish. Will force him to re-try,
5013                                  * while last one finishes.
5014                                  */
5015                                 ql_log(ql_log_warn, sess->vha, 0xf095,
5016                                     "sess %p PRLI received, before plogi ack.\n",
5017                                     sess);
5018                                 qlt_send_term_imm_notif(vha, iocb, 1);
5019                                 res = 0;
5020                                 break;
5021                         }
5022
5023                         /*
5024                          * This shouldn't happen under normal circumstances,
5025                          * since we have deleted the old session during PLOGI
5026                          */
5027                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5028                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5029                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5030
5031                         sess->local = 0;
5032                         sess->loop_id = loop_id;
5033                         sess->d_id = port_id;
5034                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5035
5036                         if (wd3_lo & BIT_7)
5037                                 sess->conf_compl_supported = 1;
5038
5039                         if ((wd3_lo & BIT_4) == 0)
5040                                 sess->port_type = FCT_INITIATOR;
5041                         else
5042                                 sess->port_type = FCT_TARGET;
5043
5044                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5045                 }
5046                 res = 1; /* send notify ack */
5047
5048                 /* Make session global (not used in fabric mode) */
5049                 if (ha->current_topology != ISP_CFG_F) {
5050                         if (sess) {
5051                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5052                                     "%s %d %8phC post nack\n",
5053                                     __func__, __LINE__, sess->port_name);
5054                                 qla24xx_post_nack_work(vha, sess, iocb,
5055                                         SRB_NACK_PRLI);
5056                                 res = 0;
5057                         } else {
5058                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5059                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5060                                 qla2xxx_wake_dpc(vha);
5061                         }
5062                 } else {
5063                         if (sess) {
5064                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5065                                     "%s %d %8phC post nack\n",
5066                                     __func__, __LINE__, sess->port_name);
5067                                 qla24xx_post_nack_work(vha, sess, iocb,
5068                                         SRB_NACK_PRLI);
5069                                 res = 0;
5070                         }
5071                 }
5072                 break;
5073
5074         case ELS_TPRLO:
5075                 if (le16_to_cpu(iocb->u.isp24.flags) &
5076                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5077                         loop_id = 0xFFFF;
5078                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5079                         res = 1;
5080                         break;
5081                 }
5082                 /* fall through */
5083         case ELS_LOGO:
5084         case ELS_PRLO:
5085                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5086                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5087                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5088
5089                 if (sess) {
5090                         sess->login_gen++;
5091                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5092                         sess->logo_ack_needed = 1;
5093                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5094                 }
5095
5096                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5097
5098                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5099                     "%s: logo %llx res %d sess %p ",
5100                     __func__, wwn, res, sess);
5101                 if (res == 0) {
5102                         /*
5103                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5104                          * for LOGO_ACK & sess delete
5105                          */
5106                         BUG_ON(!sess);
5107                         res = 0;
5108                 } else {
5109                         /* cmd did not go to upper layer. */
5110                         if (sess) {
5111                                 qlt_schedule_sess_for_deletion(sess);
5112                                 res = 0;
5113                         }
5114                         /* else logo will be ack */
5115                 }
5116                 break;
5117         case ELS_PDISC:
5118         case ELS_ADISC:
5119         {
5120                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5121
5122                 if (tgt->link_reinit_iocb_pending) {
5123                         qlt_send_notify_ack(ha->base_qpair,
5124                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5125                         tgt->link_reinit_iocb_pending = 0;
5126                 }
5127
5128                 sess = qla2x00_find_fcport_by_wwpn(vha,
5129                     iocb->u.isp24.port_name, 1);
5130                 if (sess) {
5131                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5132                                 "sess %p lid %d|%d DS %d LS %d\n",
5133                                 sess, sess->loop_id, loop_id,
5134                                 sess->disc_state, sess->fw_login_state);
5135                 }
5136
5137                 res = 1; /* send notify ack */
5138                 break;
5139         }
5140
5141         case ELS_FLOGI: /* should never happen */
5142         default:
5143                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5144                     "qla_target(%d): Unsupported ELS command %x "
5145                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5146                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5147                 break;
5148         }
5149
5150         ql_dbg(ql_dbg_disc, vha, 0xf026,
5151             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5152             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5153
5154         return res;
5155 }
5156
5157 /*
5158  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5159  */
5160 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5161         struct imm_ntfy_from_isp *iocb)
5162 {
5163         struct qla_hw_data *ha = vha->hw;
5164         uint32_t add_flags = 0;
5165         int send_notify_ack = 1;
5166         uint16_t status;
5167
5168         status = le16_to_cpu(iocb->u.isp2x.status);
5169         switch (status) {
5170         case IMM_NTFY_LIP_RESET:
5171         {
5172                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5173                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5174                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5175                     iocb->u.isp24.status_subcode);
5176
5177                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5178                         send_notify_ack = 0;
5179                 break;
5180         }
5181
5182         case IMM_NTFY_LIP_LINK_REINIT:
5183         {
5184                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5185
5186                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5187                     "qla_target(%d): LINK REINIT (loop %#x, "
5188                     "subcode %x)\n", vha->vp_idx,
5189                     le16_to_cpu(iocb->u.isp24.nport_handle),
5190                     iocb->u.isp24.status_subcode);
5191                 if (tgt->link_reinit_iocb_pending) {
5192                         qlt_send_notify_ack(ha->base_qpair,
5193                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5194                 }
5195                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5196                 tgt->link_reinit_iocb_pending = 1;
5197                 /*
5198                  * QLogic requires to wait after LINK REINIT for possible
5199                  * PDISC or ADISC ELS commands
5200                  */
5201                 send_notify_ack = 0;
5202                 break;
5203         }
5204
5205         case IMM_NTFY_PORT_LOGOUT:
5206                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5207                     "qla_target(%d): Port logout (loop "
5208                     "%#x, subcode %x)\n", vha->vp_idx,
5209                     le16_to_cpu(iocb->u.isp24.nport_handle),
5210                     iocb->u.isp24.status_subcode);
5211
5212                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5213                         send_notify_ack = 0;
5214                 /* The sessions will be cleared in the callback, if needed */
5215                 break;
5216
5217         case IMM_NTFY_GLBL_TPRLO:
5218                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5219                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5220                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5221                         send_notify_ack = 0;
5222                 /* The sessions will be cleared in the callback, if needed */
5223                 break;
5224
5225         case IMM_NTFY_PORT_CONFIG:
5226                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5227                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5228                     status);
5229                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5230                         send_notify_ack = 0;
5231                 /* The sessions will be cleared in the callback, if needed */
5232                 break;
5233
5234         case IMM_NTFY_GLBL_LOGO:
5235                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5236                     "qla_target(%d): Link failure detected\n",
5237                     vha->vp_idx);
5238                 /* I_T nexus loss */
5239                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5240                         send_notify_ack = 0;
5241                 break;
5242
5243         case IMM_NTFY_IOCB_OVERFLOW:
5244                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5245                     "qla_target(%d): Cannot provide requested "
5246                     "capability (IOCB overflowed the immediate notify "
5247                     "resource count)\n", vha->vp_idx);
5248                 break;
5249
5250         case IMM_NTFY_ABORT_TASK:
5251                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5252                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5253                     "L %#x)\n", vha->vp_idx,
5254                     le16_to_cpu(iocb->u.isp2x.seq_id),
5255                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5256                     le16_to_cpu(iocb->u.isp2x.lun));
5257                 if (qlt_abort_task(vha, iocb) == 0)
5258                         send_notify_ack = 0;
5259                 break;
5260
5261         case IMM_NTFY_RESOURCE:
5262                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5263                     "qla_target(%d): Out of resources, host %ld\n",
5264                     vha->vp_idx, vha->host_no);
5265                 break;
5266
5267         case IMM_NTFY_MSG_RX:
5268                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5269                     "qla_target(%d): Immediate notify task %x\n",
5270                     vha->vp_idx, iocb->u.isp2x.task_flags);
5271                 break;
5272
5273         case IMM_NTFY_ELS:
5274                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5275                         send_notify_ack = 0;
5276                 break;
5277         default:
5278                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5279                     "qla_target(%d): Received unknown immediate "
5280                     "notify status %x\n", vha->vp_idx, status);
5281                 break;
5282         }
5283
5284         if (send_notify_ack)
5285                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5286                     0, 0);
5287 }
5288
5289 /*
5290  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5291  * This function sends busy to ISP 2xxx or 24xx.
5292  */
5293 static int __qlt_send_busy(struct qla_qpair *qpair,
5294         struct atio_from_isp *atio, uint16_t status)
5295 {
5296         struct scsi_qla_host *vha = qpair->vha;
5297         struct ctio7_to_24xx *ctio24;
5298         struct qla_hw_data *ha = vha->hw;
5299         request_t *pkt;
5300         struct fc_port *sess = NULL;
5301         unsigned long flags;
5302         u16 temp;
5303         port_id_t id;
5304
5305         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
5306         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
5307         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
5308         id.b.rsvd_1 = 0;
5309
5310         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5311         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5312         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5313         if (!sess) {
5314                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5315                 return 0;
5316         }
5317         /* Sending marker isn't necessary, since we called from ISR */
5318
5319         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5320         if (!pkt) {
5321                 ql_dbg(ql_dbg_io, vha, 0x3063,
5322                     "qla_target(%d): %s failed: unable to allocate "
5323                     "request packet", vha->vp_idx, __func__);
5324                 return -ENOMEM;
5325         }
5326
5327         qpair->tgt_counters.num_q_full_sent++;
5328         pkt->entry_count = 1;
5329         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5330
5331         ctio24 = (struct ctio7_to_24xx *)pkt;
5332         ctio24->entry_type = CTIO_TYPE7;
5333         ctio24->nport_handle = sess->loop_id;
5334         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5335         ctio24->vp_index = vha->vp_idx;
5336         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5337         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5338         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5339         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5340         temp = (atio->u.isp24.attr << 9) |
5341                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5342                 CTIO7_FLAGS_DONT_RET_CTIO;
5343         ctio24->u.status1.flags = cpu_to_le16(temp);
5344         /*
5345          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5346          * if the explicit conformation is used.
5347          */
5348         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5349         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5350
5351         ctio24->u.status1.residual = get_datalen_for_atio(atio);
5352
5353         if (ctio24->u.status1.residual != 0)
5354                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
5355
5356         /* Memory Barrier */
5357         wmb();
5358         if (qpair->reqq_start_iocbs)
5359                 qpair->reqq_start_iocbs(qpair);
5360         else
5361                 qla2x00_start_iocbs(vha, qpair->req);
5362         return 0;
5363 }
5364
5365 /*
5366  * This routine is used to allocate a command for either a QFull condition
5367  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5368  * out previously.
5369  */
5370 static void
5371 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5372         struct atio_from_isp *atio, uint16_t status, int qfull)
5373 {
5374         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5375         struct qla_hw_data *ha = vha->hw;
5376         struct fc_port *sess;
5377         struct se_session *se_sess;
5378         struct qla_tgt_cmd *cmd;
5379         int tag, cpu;
5380         unsigned long flags;
5381
5382         if (unlikely(tgt->tgt_stop)) {
5383                 ql_dbg(ql_dbg_io, vha, 0x300a,
5384                         "New command while device %p is shutting down\n", tgt);
5385                 return;
5386         }
5387
5388         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5389                 vha->hw->tgt.num_qfull_cmds_dropped++;
5390                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5391                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5392                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5393                                 vha->hw->tgt.num_qfull_cmds_dropped;
5394
5395                 ql_dbg(ql_dbg_io, vha, 0x3068,
5396                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5397                         vha->vp_idx, __func__,
5398                         vha->hw->tgt.num_qfull_cmds_dropped);
5399
5400                 qlt_chk_exch_leak_thresh_hold(vha);
5401                 return;
5402         }
5403
5404         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5405                 (vha, atio->u.isp24.fcp_hdr.s_id);
5406         if (!sess)
5407                 return;
5408
5409         se_sess = sess->se_sess;
5410
5411         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
5412         if (tag < 0) {
5413                 ql_dbg(ql_dbg_io, vha, 0x3009,
5414                         "qla_target(%d): %s: Allocation of cmd failed\n",
5415                         vha->vp_idx, __func__);
5416
5417                 vha->hw->tgt.num_qfull_cmds_dropped++;
5418                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5419                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5420                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5421                                 vha->hw->tgt.num_qfull_cmds_dropped;
5422
5423                 qlt_chk_exch_leak_thresh_hold(vha);
5424                 return;
5425         }
5426
5427         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5428         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5429
5430         qlt_incr_num_pend_cmds(vha);
5431         INIT_LIST_HEAD(&cmd->cmd_list);
5432         memcpy(&cmd->atio, atio, sizeof(*atio));
5433
5434         cmd->tgt = vha->vha_tgt.qla_tgt;
5435         cmd->vha = vha;
5436         cmd->reset_count = ha->base_qpair->chip_reset;
5437         cmd->q_full = 1;
5438         cmd->qpair = ha->base_qpair;
5439         cmd->se_cmd.map_cpu = cpu;
5440
5441         if (qfull) {
5442                 cmd->q_full = 1;
5443                 /* NOTE: borrowing the state field to carry the status */
5444                 cmd->state = status;
5445         } else
5446                 cmd->term_exchg = 1;
5447
5448         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5449         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5450
5451         vha->hw->tgt.num_qfull_cmds_alloc++;
5452         if (vha->hw->tgt.num_qfull_cmds_alloc >
5453                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5454                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5455                         vha->hw->tgt.num_qfull_cmds_alloc;
5456         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5457 }
5458
5459 int
5460 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5461 {
5462         struct scsi_qla_host *vha = qpair->vha;
5463         struct qla_hw_data *ha = vha->hw;
5464         unsigned long flags;
5465         struct qla_tgt_cmd *cmd, *tcmd;
5466         struct list_head free_list, q_full_list;
5467         int rc = 0;
5468
5469         if (list_empty(&ha->tgt.q_full_list))
5470                 return 0;
5471
5472         INIT_LIST_HEAD(&free_list);
5473         INIT_LIST_HEAD(&q_full_list);
5474
5475         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5476         if (list_empty(&ha->tgt.q_full_list)) {
5477                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5478                 return 0;
5479         }
5480
5481         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5482         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5483
5484         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5485         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5486                 if (cmd->q_full)
5487                         /* cmd->state is a borrowed field to hold status */
5488                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5489                 else if (cmd->term_exchg)
5490                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5491
5492                 if (rc == -ENOMEM)
5493                         break;
5494
5495                 if (cmd->q_full)
5496                         ql_dbg(ql_dbg_io, vha, 0x3006,
5497                             "%s: busy sent for ox_id[%04x]\n", __func__,
5498                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5499                 else if (cmd->term_exchg)
5500                         ql_dbg(ql_dbg_io, vha, 0x3007,
5501                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5502                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5503                 else
5504                         ql_dbg(ql_dbg_io, vha, 0x3008,
5505                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5506                             cmd);
5507
5508                 list_del(&cmd->cmd_list);
5509                 list_add_tail(&cmd->cmd_list, &free_list);
5510
5511                 /* piggy back on hardware_lock for protection */
5512                 vha->hw->tgt.num_qfull_cmds_alloc--;
5513         }
5514         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5515
5516         cmd = NULL;
5517
5518         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5519                 list_del(&cmd->cmd_list);
5520                 /* This cmd was never sent to TCM.  There is no need
5521                  * to schedule free or call free_cmd
5522                  */
5523                 qlt_free_cmd(cmd);
5524         }
5525
5526         if (!list_empty(&q_full_list)) {
5527                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5528                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5529                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5530         }
5531
5532         return rc;
5533 }
5534
5535 static void
5536 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5537     uint16_t status)
5538 {
5539         int rc = 0;
5540         struct scsi_qla_host *vha = qpair->vha;
5541
5542         rc = __qlt_send_busy(qpair, atio, status);
5543         if (rc == -ENOMEM)
5544                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5545 }
5546
5547 static int
5548 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5549         struct atio_from_isp *atio, uint8_t ha_locked)
5550 {
5551         struct qla_hw_data *ha = vha->hw;
5552         unsigned long flags;
5553
5554         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5555                 return 0;
5556
5557         if (!ha_locked)
5558                 spin_lock_irqsave(&ha->hardware_lock, flags);
5559         qlt_send_busy(qpair, atio, qla_sam_status);
5560         if (!ha_locked)
5561                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5562
5563         return 1;
5564 }
5565
5566 /* ha->hardware_lock supposed to be held on entry */
5567 /* called via callback from qla2xxx */
5568 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5569         struct atio_from_isp *atio, uint8_t ha_locked)
5570 {
5571         struct qla_hw_data *ha = vha->hw;
5572         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5573         int rc;
5574         unsigned long flags = 0;
5575
5576         if (unlikely(tgt == NULL)) {
5577                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5578                     "ATIO pkt, but no tgt (ha %p)", ha);
5579                 return;
5580         }
5581         /*
5582          * In tgt_stop mode we also should allow all requests to pass.
5583          * Otherwise, some commands can stuck.
5584          */
5585
5586         tgt->atio_irq_cmd_count++;
5587
5588         switch (atio->u.raw.entry_type) {
5589         case ATIO_TYPE7:
5590                 if (unlikely(atio->u.isp24.exchange_addr ==
5591                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5592                         ql_dbg(ql_dbg_io, vha, 0x3065,
5593                             "qla_target(%d): ATIO_TYPE7 "
5594                             "received with UNKNOWN exchange address, "
5595                             "sending QUEUE_FULL\n", vha->vp_idx);
5596                         if (!ha_locked)
5597                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5598                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5599                         if (!ha_locked)
5600                                 spin_unlock_irqrestore(&ha->hardware_lock,
5601                                     flags);
5602                         break;
5603                 }
5604
5605                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5606                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5607                             atio, ha_locked);
5608                         if (rc != 0) {
5609                                 tgt->atio_irq_cmd_count--;
5610                                 return;
5611                         }
5612                         rc = qlt_handle_cmd_for_atio(vha, atio);
5613                 } else {
5614                         rc = qlt_handle_task_mgmt(vha, atio);
5615                 }
5616                 if (unlikely(rc != 0)) {
5617                         if (!ha_locked)
5618                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5619                         switch (rc) {
5620                         case -ENODEV:
5621                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5622                                     "qla_target: Unable to send command to target\n");
5623                                 break;
5624                         case -EBADF:
5625                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5626                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5627                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5628                                     atio, 1, 0);
5629                                 break;
5630                         case -EBUSY:
5631                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5632                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5633                                     vha->vp_idx);
5634                                 qlt_send_busy(ha->base_qpair, atio,
5635                                     tc_sam_status);
5636                                 break;
5637                         default:
5638                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5639                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5640                                     vha->vp_idx);
5641                                 qlt_send_busy(ha->base_qpair, atio,
5642                                     qla_sam_status);
5643                                 break;
5644                         }
5645                         if (!ha_locked)
5646                                 spin_unlock_irqrestore(&ha->hardware_lock,
5647                                     flags);
5648                 }
5649                 break;
5650
5651         case IMMED_NOTIFY_TYPE:
5652         {
5653                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5654                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5655                             "qla_target(%d): Received ATIO packet %x "
5656                             "with error status %x\n", vha->vp_idx,
5657                             atio->u.raw.entry_type,
5658                             atio->u.isp2x.entry_status);
5659                         break;
5660                 }
5661                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5662
5663                 if (!ha_locked)
5664                         spin_lock_irqsave(&ha->hardware_lock, flags);
5665                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5666                 if (!ha_locked)
5667                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5668                 break;
5669         }
5670
5671         default:
5672                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5673                     "qla_target(%d): Received unknown ATIO atio "
5674                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5675                 break;
5676         }
5677
5678         tgt->atio_irq_cmd_count--;
5679 }
5680
5681 /*
5682  * qpair lock is assume to be held
5683  * rc = 0 : send terminate & abts respond
5684  * rc != 0: do not send term & abts respond
5685  */
5686 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5687     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5688 {
5689         struct qla_hw_data *ha = vha->hw;
5690         int rc = 0;
5691
5692         /*
5693          * Detect unresolved exchange. If the same ABTS is unable
5694          * to terminate an existing command and the same ABTS loops
5695          * between FW & Driver, then force FW dump. Under 1 jiff,
5696          * we should see multiple loops.
5697          */
5698         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5699             qpair->retry_term_jiff == jiffies) {
5700                 /* found existing exchange */
5701                 qpair->retry_term_cnt++;
5702                 if (qpair->retry_term_cnt >= 5) {
5703                         rc = EIO;
5704                         qpair->retry_term_cnt = 0;
5705                         ql_log(ql_log_warn, vha, 0xffff,
5706                             "Unable to send ABTS Respond. Dumping firmware.\n");
5707                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5708                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5709
5710                         if (qpair == ha->base_qpair)
5711                                 ha->isp_ops->fw_dump(vha, 1);
5712                         else
5713                                 ha->isp_ops->fw_dump(vha, 0);
5714
5715                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5716                         qla2xxx_wake_dpc(vha);
5717                 }
5718         } else if (qpair->retry_term_jiff != jiffies) {
5719                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5720                 qpair->retry_term_cnt = 0;
5721                 qpair->retry_term_jiff = jiffies;
5722         }
5723
5724         return rc;
5725 }
5726
5727
5728 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5729         struct rsp_que *rsp, response_t *pkt)
5730 {
5731         struct abts_resp_from_24xx_fw *entry =
5732                 (struct abts_resp_from_24xx_fw *)pkt;
5733         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5734         struct qla_tgt_mgmt_cmd *mcmd;
5735         struct qla_hw_data *ha = vha->hw;
5736
5737         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5738         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5739                 ql_dbg(ql_dbg_async, vha, 0xe064,
5740                     "qla_target(%d): ABTS Comp without mcmd\n",
5741                     vha->vp_idx);
5742                 return;
5743         }
5744
5745         if (mcmd)
5746                 vha  = mcmd->vha;
5747         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5748
5749         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5750             "ABTS_RESP_24XX: compl_status %x\n",
5751             entry->compl_status);
5752
5753         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5754                 if ((entry->error_subcode1 == 0x1E) &&
5755                     (entry->error_subcode2 == 0)) {
5756                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5757                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5758                                 return;
5759                         }
5760                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5761                             pkt, mcmd);
5762                 } else {
5763                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5764                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5765                             vha->vp_idx, entry->compl_status,
5766                             entry->error_subcode1,
5767                             entry->error_subcode2);
5768                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5769                 }
5770         } else {
5771                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5772         }
5773 }
5774
5775 /* ha->hardware_lock supposed to be held on entry */
5776 /* called via callback from qla2xxx */
5777 static void qlt_response_pkt(struct scsi_qla_host *vha,
5778         struct rsp_que *rsp, response_t *pkt)
5779 {
5780         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5781
5782         if (unlikely(tgt == NULL)) {
5783                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5784                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5785                     vha->vp_idx, pkt->entry_type, vha->hw);
5786                 return;
5787         }
5788
5789         /*
5790          * In tgt_stop mode we also should allow all requests to pass.
5791          * Otherwise, some commands can stuck.
5792          */
5793
5794         switch (pkt->entry_type) {
5795         case CTIO_CRC2:
5796         case CTIO_TYPE7:
5797         {
5798                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5799
5800                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5801                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5802                     entry);
5803                 break;
5804         }
5805
5806         case ACCEPT_TGT_IO_TYPE:
5807         {
5808                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5809                 int rc;
5810
5811                 if (atio->u.isp2x.status !=
5812                     cpu_to_le16(ATIO_CDB_VALID)) {
5813                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5814                             "qla_target(%d): ATIO with error "
5815                             "status %x received\n", vha->vp_idx,
5816                             le16_to_cpu(atio->u.isp2x.status));
5817                         break;
5818                 }
5819
5820                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5821                 if (rc != 0)
5822                         return;
5823
5824                 rc = qlt_handle_cmd_for_atio(vha, atio);
5825                 if (unlikely(rc != 0)) {
5826                         switch (rc) {
5827                         case -ENODEV:
5828                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5829                                     "qla_target: Unable to send command to target\n");
5830                                 break;
5831                         case -EBADF:
5832                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5833                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5834                                 qlt_send_term_exchange(rsp->qpair, NULL,
5835                                     atio, 1, 0);
5836                                 break;
5837                         case -EBUSY:
5838                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5839                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5840                                     vha->vp_idx);
5841                                 qlt_send_busy(rsp->qpair, atio,
5842                                     tc_sam_status);
5843                                 break;
5844                         default:
5845                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5846                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5847                                     vha->vp_idx);
5848                                 qlt_send_busy(rsp->qpair, atio,
5849                                     qla_sam_status);
5850                                 break;
5851                         }
5852                 }
5853         }
5854         break;
5855
5856         case CONTINUE_TGT_IO_TYPE:
5857         {
5858                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5859
5860                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5861                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5862                     entry);
5863                 break;
5864         }
5865
5866         case CTIO_A64_TYPE:
5867         {
5868                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5869
5870                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5871                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5872                     entry);
5873                 break;
5874         }
5875
5876         case IMMED_NOTIFY_TYPE:
5877                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5878                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5879                 break;
5880
5881         case NOTIFY_ACK_TYPE:
5882                 if (tgt->notify_ack_expected > 0) {
5883                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5884
5885                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5886                             "NOTIFY_ACK seq %08x status %x\n",
5887                             le16_to_cpu(entry->u.isp2x.seq_id),
5888                             le16_to_cpu(entry->u.isp2x.status));
5889                         tgt->notify_ack_expected--;
5890                         if (entry->u.isp2x.status !=
5891                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5892                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5893                                     "qla_target(%d): NOTIFY_ACK "
5894                                     "failed %x\n", vha->vp_idx,
5895                                     le16_to_cpu(entry->u.isp2x.status));
5896                         }
5897                 } else {
5898                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5899                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5900                             vha->vp_idx);
5901                 }
5902                 break;
5903
5904         case ABTS_RECV_24XX:
5905                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5906                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5907                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5908                 break;
5909
5910         case ABTS_RESP_24XX:
5911                 if (tgt->abts_resp_expected > 0) {
5912                         qlt_handle_abts_completion(vha, rsp, pkt);
5913                 } else {
5914                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5915                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5916                             "received\n", vha->vp_idx);
5917                 }
5918                 break;
5919
5920         default:
5921                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5922                     "qla_target(%d): Received unknown response pkt "
5923                     "type %x\n", vha->vp_idx, pkt->entry_type);
5924                 break;
5925         }
5926
5927 }
5928
5929 /*
5930  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5931  */
5932 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5933         uint16_t *mailbox)
5934 {
5935         struct qla_hw_data *ha = vha->hw;
5936         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5937         int login_code;
5938
5939         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5940                 return;
5941
5942         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5943             IS_QLA2100(ha))
5944                 return;
5945         /*
5946          * In tgt_stop mode we also should allow all requests to pass.
5947          * Otherwise, some commands can stuck.
5948          */
5949
5950
5951         switch (code) {
5952         case MBA_RESET:                 /* Reset */
5953         case MBA_SYSTEM_ERR:            /* System Error */
5954         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5955         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5956                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5957                     "qla_target(%d): System error async event %#x "
5958                     "occurred", vha->vp_idx, code);
5959                 break;
5960         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5961                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5962                 break;
5963
5964         case MBA_LOOP_UP:
5965         {
5966                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5967                     "qla_target(%d): Async LOOP_UP occurred "
5968                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5969                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5970                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5971                 if (tgt->link_reinit_iocb_pending) {
5972                         qlt_send_notify_ack(ha->base_qpair,
5973                             (void *)&tgt->link_reinit_iocb,
5974                             0, 0, 0, 0, 0, 0);
5975                         tgt->link_reinit_iocb_pending = 0;
5976                 }
5977                 break;
5978         }
5979
5980         case MBA_LIP_OCCURRED:
5981         case MBA_LOOP_DOWN:
5982         case MBA_LIP_RESET:
5983         case MBA_RSCN_UPDATE:
5984                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5985                     "qla_target(%d): Async event %#x occurred "
5986                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5987                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5988                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5989                 break;
5990
5991         case MBA_REJECTED_FCP_CMD:
5992                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5993                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5994                     vha->vp_idx,
5995                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5996                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5997
5998                 if (le16_to_cpu(mailbox[3]) == 1) {
5999                         /* exchange starvation. */
6000                         vha->hw->exch_starvation++;
6001                         if (vha->hw->exch_starvation > 5) {
6002                                 ql_log(ql_log_warn, vha, 0xd03a,
6003                                     "Exchange starvation-. Resetting RISC\n");
6004
6005                                 vha->hw->exch_starvation = 0;
6006                                 if (IS_P3P_TYPE(vha->hw))
6007                                         set_bit(FCOE_CTX_RESET_NEEDED,
6008                                             &vha->dpc_flags);
6009                                 else
6010                                         set_bit(ISP_ABORT_NEEDED,
6011                                             &vha->dpc_flags);
6012                                 qla2xxx_wake_dpc(vha);
6013                         }
6014                 }
6015                 break;
6016
6017         case MBA_PORT_UPDATE:
6018                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
6019                     "qla_target(%d): Port update async event %#x "
6020                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
6021                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6022                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
6023                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
6024
6025                 login_code = le16_to_cpu(mailbox[2]);
6026                 if (login_code == 0x4) {
6027                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
6028                             "Async MB 2: Got PLOGI Complete\n");
6029                         vha->hw->exch_starvation = 0;
6030                 } else if (login_code == 0x7)
6031                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
6032                             "Async MB 2: Port Logged Out\n");
6033                 break;
6034         default:
6035                 break;
6036         }
6037
6038 }
6039
6040 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6041         uint16_t loop_id)
6042 {
6043         fc_port_t *fcport, *tfcp, *del;
6044         int rc;
6045         unsigned long flags;
6046         u8 newfcport = 0;
6047
6048         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6049         if (!fcport) {
6050                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6051                     "qla_target(%d): Allocation of tmp FC port failed",
6052                     vha->vp_idx);
6053                 return NULL;
6054         }
6055
6056         fcport->loop_id = loop_id;
6057
6058         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6059         if (rc != QLA_SUCCESS) {
6060                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6061                     "qla_target(%d): Failed to retrieve fcport "
6062                     "information -- get_port_database() returned %x "
6063                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6064                 kfree(fcport);
6065                 return NULL;
6066         }
6067
6068         del = NULL;
6069         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6070         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6071
6072         if (tfcp) {
6073                 tfcp->d_id = fcport->d_id;
6074                 tfcp->port_type = fcport->port_type;
6075                 tfcp->supported_classes = fcport->supported_classes;
6076                 tfcp->flags |= fcport->flags;
6077                 tfcp->scan_state = QLA_FCPORT_FOUND;
6078
6079                 del = fcport;
6080                 fcport = tfcp;
6081         } else {
6082                 if (vha->hw->current_topology == ISP_CFG_F)
6083                         fcport->flags |= FCF_FABRIC_DEVICE;
6084
6085                 list_add_tail(&fcport->list, &vha->vp_fcports);
6086                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6087                    vha->fcport_count++;
6088                 fcport->login_gen++;
6089                 fcport->disc_state = DSC_LOGIN_COMPLETE;
6090                 fcport->login_succ = 1;
6091                 newfcport = 1;
6092         }
6093
6094         fcport->deleted = 0;
6095         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6096
6097         switch (vha->host->active_mode) {
6098         case MODE_INITIATOR:
6099         case MODE_DUAL:
6100                 if (newfcport) {
6101                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6102                                 qla24xx_sched_upd_fcport(fcport);
6103                         } else {
6104                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6105                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6106                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6107                                 qla24xx_post_gpsc_work(vha, fcport);
6108                         }
6109                 }
6110                 break;
6111
6112         case MODE_TARGET:
6113         default:
6114                 break;
6115         }
6116         if (del)
6117                 qla2x00_free_fcport(del);
6118
6119         return fcport;
6120 }
6121
6122 /* Must be called under tgt_mutex */
6123 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6124         uint8_t *s_id)
6125 {
6126         struct fc_port *sess = NULL;
6127         fc_port_t *fcport = NULL;
6128         int rc, global_resets;
6129         uint16_t loop_id = 0;
6130
6131         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
6132                 /*
6133                  * This is Domain Controller, so it should be
6134                  * OK to drop SCSI commands from it.
6135                  */
6136                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6137                     "Unable to find initiator with S_ID %x:%x:%x",
6138                     s_id[0], s_id[1], s_id[2]);
6139                 return NULL;
6140         }
6141
6142         mutex_lock(&vha->vha_tgt.tgt_mutex);
6143
6144 retry:
6145         global_resets =
6146             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6147
6148         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6149         if (rc != 0) {
6150                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6151
6152                 ql_log(ql_log_info, vha, 0xf071,
6153                     "qla_target(%d): Unable to find "
6154                     "initiator with S_ID %x:%x:%x",
6155                     vha->vp_idx, s_id[0], s_id[1],
6156                     s_id[2]);
6157
6158                 if (rc == -ENOENT) {
6159                         qlt_port_logo_t logo;
6160
6161                         sid_to_portid(s_id, &logo.id);
6162                         logo.cmd_count = 1;
6163                         qlt_send_first_logo(vha, &logo);
6164                 }
6165
6166                 return NULL;
6167         }
6168
6169         fcport = qlt_get_port_database(vha, loop_id);
6170         if (!fcport) {
6171                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6172                 return NULL;
6173         }
6174
6175         if (global_resets !=
6176             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6177                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6178                     "qla_target(%d): global reset during session discovery "
6179                     "(counter was %d, new %d), retrying", vha->vp_idx,
6180                     global_resets,
6181                     atomic_read(&vha->vha_tgt.
6182                         qla_tgt->tgt_global_resets_count));
6183                 goto retry;
6184         }
6185
6186         sess = qlt_create_sess(vha, fcport, true);
6187
6188         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6189
6190         return sess;
6191 }
6192
6193 static void qlt_abort_work(struct qla_tgt *tgt,
6194         struct qla_tgt_sess_work_param *prm)
6195 {
6196         struct scsi_qla_host *vha = tgt->vha;
6197         struct qla_hw_data *ha = vha->hw;
6198         struct fc_port *sess = NULL;
6199         unsigned long flags = 0, flags2 = 0;
6200         uint32_t be_s_id;
6201         uint8_t s_id[3];
6202         int rc;
6203
6204         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6205
6206         if (tgt->tgt_stop)
6207                 goto out_term2;
6208
6209         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
6210         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
6211         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
6212
6213         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
6214             (unsigned char *)&be_s_id);
6215         if (!sess) {
6216                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6217
6218                 sess = qlt_make_local_sess(vha, s_id);
6219                 /* sess has got an extra creation ref */
6220
6221                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6222                 if (!sess)
6223                         goto out_term2;
6224         } else {
6225                 if (sess->deleted) {
6226                         sess = NULL;
6227                         goto out_term2;
6228                 }
6229
6230                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6231                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6232                             "%s: kref_get fail %8phC \n",
6233                              __func__, sess->port_name);
6234                         sess = NULL;
6235                         goto out_term2;
6236                 }
6237         }
6238
6239         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6240         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6241
6242         ha->tgt.tgt_ops->put_sess(sess);
6243
6244         if (rc != 0)
6245                 goto out_term;
6246         return;
6247
6248 out_term2:
6249         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6250
6251         if (sess)
6252                 ha->tgt.tgt_ops->put_sess(sess);
6253
6254 out_term:
6255         spin_lock_irqsave(&ha->hardware_lock, flags);
6256         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6257             FCP_TMF_REJECTED, false);
6258         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6259 }
6260
6261 static void qlt_tmr_work(struct qla_tgt *tgt,
6262         struct qla_tgt_sess_work_param *prm)
6263 {
6264         struct atio_from_isp *a = &prm->tm_iocb2;
6265         struct scsi_qla_host *vha = tgt->vha;
6266         struct qla_hw_data *ha = vha->hw;
6267         struct fc_port *sess;
6268         unsigned long flags;
6269         uint8_t *s_id = NULL; /* to hide compiler warnings */
6270         int rc;
6271         u64 unpacked_lun;
6272         int fn;
6273         void *iocb;
6274
6275         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6276
6277         if (tgt->tgt_stop)
6278                 goto out_term2;
6279
6280         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6281         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6282         if (!sess) {
6283                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6284
6285                 sess = qlt_make_local_sess(vha, s_id);
6286                 /* sess has got an extra creation ref */
6287
6288                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6289                 if (!sess)
6290                         goto out_term2;
6291         } else {
6292                 if (sess->deleted) {
6293                         goto out_term2;
6294                 }
6295
6296                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6297                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6298                             "%s: kref_get fail %8phC\n",
6299                              __func__, sess->port_name);
6300                         goto out_term2;
6301                 }
6302         }
6303
6304         iocb = a;
6305         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6306         unpacked_lun =
6307             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6308
6309         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6310         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6311
6312         ha->tgt.tgt_ops->put_sess(sess);
6313
6314         if (rc != 0)
6315                 goto out_term;
6316         return;
6317
6318 out_term2:
6319         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6320 out_term:
6321         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6322 }
6323
6324 static void qlt_sess_work_fn(struct work_struct *work)
6325 {
6326         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6327         struct scsi_qla_host *vha = tgt->vha;
6328         unsigned long flags;
6329
6330         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6331
6332         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6333         while (!list_empty(&tgt->sess_works_list)) {
6334                 struct qla_tgt_sess_work_param *prm = list_entry(
6335                     tgt->sess_works_list.next, typeof(*prm),
6336                     sess_works_list_entry);
6337
6338                 /*
6339                  * This work can be scheduled on several CPUs at time, so we
6340                  * must delete the entry to eliminate double processing
6341                  */
6342                 list_del(&prm->sess_works_list_entry);
6343
6344                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6345
6346                 switch (prm->type) {
6347                 case QLA_TGT_SESS_WORK_ABORT:
6348                         qlt_abort_work(tgt, prm);
6349                         break;
6350                 case QLA_TGT_SESS_WORK_TM:
6351                         qlt_tmr_work(tgt, prm);
6352                         break;
6353                 default:
6354                         BUG_ON(1);
6355                         break;
6356                 }
6357
6358                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6359
6360                 kfree(prm);
6361         }
6362         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6363 }
6364
6365 /* Must be called under tgt_host_action_mutex */
6366 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6367 {
6368         struct qla_tgt *tgt;
6369         int rc, i;
6370         struct qla_qpair_hint *h;
6371
6372         if (!QLA_TGT_MODE_ENABLED())
6373                 return 0;
6374
6375         if (!IS_TGT_MODE_CAPABLE(ha)) {
6376                 ql_log(ql_log_warn, base_vha, 0xe070,
6377                     "This adapter does not support target mode.\n");
6378                 return 0;
6379         }
6380
6381         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6382             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6383
6384         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6385
6386         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6387         if (!tgt) {
6388                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6389                     "Unable to allocate struct qla_tgt\n");
6390                 return -ENOMEM;
6391         }
6392
6393         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6394                                sizeof(struct qla_qpair_hint),
6395                                GFP_KERNEL);
6396         if (!tgt->qphints) {
6397                 kfree(tgt);
6398                 ql_log(ql_log_warn, base_vha, 0x0197,
6399                     "Unable to allocate qpair hints.\n");
6400                 return -ENOMEM;
6401         }
6402
6403         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6404                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6405
6406         rc = btree_init64(&tgt->lun_qpair_map);
6407         if (rc) {
6408                 kfree(tgt->qphints);
6409                 kfree(tgt);
6410                 ql_log(ql_log_info, base_vha, 0x0198,
6411                         "Unable to initialize lun_qpair_map btree\n");
6412                 return -EIO;
6413         }
6414         h = &tgt->qphints[0];
6415         h->qpair = ha->base_qpair;
6416         INIT_LIST_HEAD(&h->hint_elem);
6417         h->cpuid = ha->base_qpair->cpuid;
6418         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6419
6420         for (i = 0; i < ha->max_qpairs; i++) {
6421                 unsigned long flags;
6422
6423                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6424
6425                 h = &tgt->qphints[i + 1];
6426                 INIT_LIST_HEAD(&h->hint_elem);
6427                 if (qpair) {
6428                         h->qpair = qpair;
6429                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6430                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6431                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6432                         h->cpuid = qpair->cpuid;
6433                 }
6434         }
6435
6436         tgt->ha = ha;
6437         tgt->vha = base_vha;
6438         init_waitqueue_head(&tgt->waitQ);
6439         INIT_LIST_HEAD(&tgt->del_sess_list);
6440         spin_lock_init(&tgt->sess_work_lock);
6441         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6442         INIT_LIST_HEAD(&tgt->sess_works_list);
6443         atomic_set(&tgt->tgt_global_resets_count, 0);
6444
6445         base_vha->vha_tgt.qla_tgt = tgt;
6446
6447         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6448                 "qla_target(%d): using 64 Bit PCI addressing",
6449                 base_vha->vp_idx);
6450         /* 3 is reserved */
6451         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6452
6453         mutex_lock(&qla_tgt_mutex);
6454         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6455         mutex_unlock(&qla_tgt_mutex);
6456
6457         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6458                 ha->tgt.tgt_ops->add_target(base_vha);
6459
6460         return 0;
6461 }
6462
6463 /* Must be called under tgt_host_action_mutex */
6464 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6465 {
6466         if (!vha->vha_tgt.qla_tgt)
6467                 return 0;
6468
6469         if (vha->fc_vport) {
6470                 qlt_release(vha->vha_tgt.qla_tgt);
6471                 return 0;
6472         }
6473
6474         /* free left over qfull cmds */
6475         qlt_init_term_exchange(vha);
6476
6477         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6478             vha->host_no, ha);
6479         qlt_release(vha->vha_tgt.qla_tgt);
6480
6481         return 0;
6482 }
6483
6484 void qlt_remove_target_resources(struct qla_hw_data *ha)
6485 {
6486         struct scsi_qla_host *node;
6487         u32 key = 0;
6488
6489         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6490                 btree_remove32(&ha->tgt.host_map, key);
6491
6492         btree_destroy32(&ha->tgt.host_map);
6493 }
6494
6495 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6496         unsigned char *b)
6497 {
6498         int i;
6499
6500         pr_debug("qla2xxx HW vha->node_name: ");
6501         for (i = 0; i < WWN_SIZE; i++)
6502                 pr_debug("%02x ", vha->node_name[i]);
6503         pr_debug("\n");
6504         pr_debug("qla2xxx HW vha->port_name: ");
6505         for (i = 0; i < WWN_SIZE; i++)
6506                 pr_debug("%02x ", vha->port_name[i]);
6507         pr_debug("\n");
6508
6509         pr_debug("qla2xxx passed configfs WWPN: ");
6510         put_unaligned_be64(wwpn, b);
6511         for (i = 0; i < WWN_SIZE; i++)
6512                 pr_debug("%02x ", b[i]);
6513         pr_debug("\n");
6514 }
6515
6516 /**
6517  * qla_tgt_lport_register - register lport with external module
6518  *
6519  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6520  * @phys_wwpn: physical port WWPN
6521  * @npiv_wwpn: NPIV WWPN
6522  * @npiv_wwnn: NPIV WWNN
6523  * @callback:  lport initialization callback for tcm_qla2xxx code
6524  */
6525 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6526                        u64 npiv_wwpn, u64 npiv_wwnn,
6527                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6528 {
6529         struct qla_tgt *tgt;
6530         struct scsi_qla_host *vha;
6531         struct qla_hw_data *ha;
6532         struct Scsi_Host *host;
6533         unsigned long flags;
6534         int rc;
6535         u8 b[WWN_SIZE];
6536
6537         mutex_lock(&qla_tgt_mutex);
6538         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6539                 vha = tgt->vha;
6540                 ha = vha->hw;
6541
6542                 host = vha->host;
6543                 if (!host)
6544                         continue;
6545
6546                 if (!(host->hostt->supported_mode & MODE_TARGET))
6547                         continue;
6548
6549                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6550                         continue;
6551
6552                 spin_lock_irqsave(&ha->hardware_lock, flags);
6553                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6554                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6555                             host->host_no);
6556                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6557                         continue;
6558                 }
6559                 if (tgt->tgt_stop) {
6560                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6561                                  host->host_no);
6562                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6563                         continue;
6564                 }
6565                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6566
6567                 if (!scsi_host_get(host)) {
6568                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6569                             "Unable to scsi_host_get() for"
6570                             " qla2xxx scsi_host\n");
6571                         continue;
6572                 }
6573                 qlt_lport_dump(vha, phys_wwpn, b);
6574
6575                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6576                         scsi_host_put(host);
6577                         continue;
6578                 }
6579                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6580                 if (rc != 0)
6581                         scsi_host_put(host);
6582
6583                 mutex_unlock(&qla_tgt_mutex);
6584                 return rc;
6585         }
6586         mutex_unlock(&qla_tgt_mutex);
6587
6588         return -ENODEV;
6589 }
6590 EXPORT_SYMBOL(qlt_lport_register);
6591
6592 /**
6593  * qla_tgt_lport_deregister - Degister lport
6594  *
6595  * @vha:  Registered scsi_qla_host pointer
6596  */
6597 void qlt_lport_deregister(struct scsi_qla_host *vha)
6598 {
6599         struct qla_hw_data *ha = vha->hw;
6600         struct Scsi_Host *sh = vha->host;
6601         /*
6602          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6603          */
6604         vha->vha_tgt.target_lport_ptr = NULL;
6605         ha->tgt.tgt_ops = NULL;
6606         /*
6607          * Release the Scsi_Host reference for the underlying qla2xxx host
6608          */
6609         scsi_host_put(sh);
6610 }
6611 EXPORT_SYMBOL(qlt_lport_deregister);
6612
6613 /* Must be called under HW lock */
6614 void qlt_set_mode(struct scsi_qla_host *vha)
6615 {
6616         switch (vha->qlini_mode) {
6617         case QLA2XXX_INI_MODE_DISABLED:
6618         case QLA2XXX_INI_MODE_EXCLUSIVE:
6619                 vha->host->active_mode = MODE_TARGET;
6620                 break;
6621         case QLA2XXX_INI_MODE_ENABLED:
6622                 vha->host->active_mode = MODE_INITIATOR;
6623                 break;
6624         case QLA2XXX_INI_MODE_DUAL:
6625                 vha->host->active_mode = MODE_DUAL;
6626                 break;
6627         default:
6628                 break;
6629         }
6630 }
6631
6632 /* Must be called under HW lock */
6633 static void qlt_clear_mode(struct scsi_qla_host *vha)
6634 {
6635         switch (vha->qlini_mode) {
6636         case QLA2XXX_INI_MODE_DISABLED:
6637                 vha->host->active_mode = MODE_UNKNOWN;
6638                 break;
6639         case QLA2XXX_INI_MODE_EXCLUSIVE:
6640                 vha->host->active_mode = MODE_INITIATOR;
6641                 break;
6642         case QLA2XXX_INI_MODE_ENABLED:
6643         case QLA2XXX_INI_MODE_DUAL:
6644                 vha->host->active_mode = MODE_INITIATOR;
6645                 break;
6646         default:
6647                 break;
6648         }
6649 }
6650
6651 /*
6652  * qla_tgt_enable_vha - NO LOCK HELD
6653  *
6654  * host_reset, bring up w/ Target Mode Enabled
6655  */
6656 void
6657 qlt_enable_vha(struct scsi_qla_host *vha)
6658 {
6659         struct qla_hw_data *ha = vha->hw;
6660         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6661         unsigned long flags;
6662         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6663
6664         if (!tgt) {
6665                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6666                     "Unable to locate qla_tgt pointer from"
6667                     " struct qla_hw_data\n");
6668                 dump_stack();
6669                 return;
6670         }
6671         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6672                 return;
6673
6674         spin_lock_irqsave(&ha->hardware_lock, flags);
6675         tgt->tgt_stopped = 0;
6676         qlt_set_mode(vha);
6677         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6678
6679         mutex_lock(&ha->optrom_mutex);
6680         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6681             "%s.\n", __func__);
6682         if (vha->vp_idx) {
6683                 qla24xx_disable_vp(vha);
6684                 qla24xx_enable_vp(vha);
6685         } else {
6686                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6687                 qla2xxx_wake_dpc(base_vha);
6688                 qla2x00_wait_for_hba_online(base_vha);
6689         }
6690         mutex_unlock(&ha->optrom_mutex);
6691 }
6692 EXPORT_SYMBOL(qlt_enable_vha);
6693
6694 /*
6695  * qla_tgt_disable_vha - NO LOCK HELD
6696  *
6697  * Disable Target Mode and reset the adapter
6698  */
6699 static void qlt_disable_vha(struct scsi_qla_host *vha)
6700 {
6701         struct qla_hw_data *ha = vha->hw;
6702         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6703         unsigned long flags;
6704
6705         if (!tgt) {
6706                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6707                     "Unable to locate qla_tgt pointer from"
6708                     " struct qla_hw_data\n");
6709                 dump_stack();
6710                 return;
6711         }
6712
6713         spin_lock_irqsave(&ha->hardware_lock, flags);
6714         qlt_clear_mode(vha);
6715         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6716
6717         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6718         qla2xxx_wake_dpc(vha);
6719         qla2x00_wait_for_hba_online(vha);
6720 }
6721
6722 /*
6723  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6724  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6725  * members.
6726  */
6727 void
6728 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6729 {
6730         vha->vha_tgt.qla_tgt = NULL;
6731
6732         mutex_init(&vha->vha_tgt.tgt_mutex);
6733         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6734
6735         qlt_clear_mode(vha);
6736
6737         /*
6738          * NOTE: Currently the value is kept the same for <24xx and
6739          * >=24xx ISPs. If it is necessary to change it,
6740          * the check should be added for specific ISPs,
6741          * assigning the value appropriately.
6742          */
6743         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6744
6745         qlt_add_target(ha, vha);
6746 }
6747
6748 u8
6749 qlt_rff_id(struct scsi_qla_host *vha)
6750 {
6751         u8 fc4_feature = 0;
6752         /*
6753          * FC-4 Feature bit 0 indicates target functionality to the name server.
6754          */
6755         if (qla_tgt_mode_enabled(vha)) {
6756                 fc4_feature = BIT_0;
6757         } else if (qla_ini_mode_enabled(vha)) {
6758                 fc4_feature = BIT_1;
6759         } else if (qla_dual_mode_enabled(vha))
6760                 fc4_feature = BIT_0 | BIT_1;
6761
6762         return fc4_feature;
6763 }
6764
6765 /*
6766  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6767  * @ha: HA context
6768  *
6769  * Beginning of ATIO ring has initialization control block already built
6770  * by nvram config routine.
6771  *
6772  * Returns 0 on success.
6773  */
6774 void
6775 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6776 {
6777         struct qla_hw_data *ha = vha->hw;
6778         uint16_t cnt;
6779         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6780
6781         if (qla_ini_mode_enabled(vha))
6782                 return;
6783
6784         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6785                 pkt->u.raw.signature = ATIO_PROCESSED;
6786                 pkt++;
6787         }
6788
6789 }
6790
6791 /*
6792  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6793  * @ha: SCSI driver HA context
6794  */
6795 void
6796 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6797 {
6798         struct qla_hw_data *ha = vha->hw;
6799         struct atio_from_isp *pkt;
6800         int cnt, i;
6801
6802         if (!ha->flags.fw_started)
6803                 return;
6804
6805         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6806             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6807                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6808                 cnt = pkt->u.raw.entry_count;
6809
6810                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6811                         /*
6812                          * This packet is corrupted. The header + payload
6813                          * can not be trusted. There is no point in passing
6814                          * it further up.
6815                          */
6816                         ql_log(ql_log_warn, vha, 0xd03c,
6817                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6818                             pkt->u.isp24.fcp_hdr.s_id,
6819                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6820                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6821
6822                         adjust_corrupted_atio(pkt);
6823                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6824                             ha_locked, 0);
6825                 } else {
6826                         qlt_24xx_atio_pkt_all_vps(vha,
6827                             (struct atio_from_isp *)pkt, ha_locked);
6828                 }
6829
6830                 for (i = 0; i < cnt; i++) {
6831                         ha->tgt.atio_ring_index++;
6832                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6833                                 ha->tgt.atio_ring_index = 0;
6834                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6835                         } else
6836                                 ha->tgt.atio_ring_ptr++;
6837
6838                         pkt->u.raw.signature = ATIO_PROCESSED;
6839                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6840                 }
6841                 wmb();
6842         }
6843
6844         /* Adjust ring index */
6845         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6846 }
6847
6848 void
6849 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6850 {
6851         struct qla_hw_data *ha = vha->hw;
6852         struct qla_msix_entry *msix = &ha->msix_entries[2];
6853         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6854
6855         if (!QLA_TGT_MODE_ENABLED())
6856                 return;
6857
6858         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6859         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6860         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6861
6862         if (ha->flags.msix_enabled) {
6863                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6864                         if (IS_QLA2071(ha)) {
6865                                 /* 4 ports Baker: Enable Interrupt Handshake */
6866                                 icb->msix_atio = 0;
6867                                 icb->firmware_options_2 |= BIT_26;
6868                         } else {
6869                                 icb->msix_atio = cpu_to_le16(msix->entry);
6870                                 icb->firmware_options_2 &= ~BIT_26;
6871                         }
6872                         ql_dbg(ql_dbg_init, vha, 0xf072,
6873                             "Registering ICB vector 0x%x for atio que.\n",
6874                             msix->entry);
6875                 }
6876         } else {
6877                 /* INTx|MSI */
6878                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6879                         icb->msix_atio = 0;
6880                         icb->firmware_options_2 |= BIT_26;
6881                         ql_dbg(ql_dbg_init, vha, 0xf072,
6882                             "%s: Use INTx for ATIOQ.\n", __func__);
6883                 }
6884         }
6885 }
6886
6887 void
6888 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6889 {
6890         struct qla_hw_data *ha = vha->hw;
6891         u32 tmp;
6892
6893         if (!QLA_TGT_MODE_ENABLED())
6894                 return;
6895
6896         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6897                 if (!ha->tgt.saved_set) {
6898                         /* We save only once */
6899                         ha->tgt.saved_exchange_count = nv->exchange_count;
6900                         ha->tgt.saved_firmware_options_1 =
6901                             nv->firmware_options_1;
6902                         ha->tgt.saved_firmware_options_2 =
6903                             nv->firmware_options_2;
6904                         ha->tgt.saved_firmware_options_3 =
6905                             nv->firmware_options_3;
6906                         ha->tgt.saved_set = 1;
6907                 }
6908
6909                 if (qla_tgt_mode_enabled(vha))
6910                         nv->exchange_count = cpu_to_le16(0xFFFF);
6911                 else                    /* dual */
6912                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6913
6914                 /* Enable target mode */
6915                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6916
6917                 /* Disable ini mode, if requested */
6918                 if (qla_tgt_mode_enabled(vha))
6919                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6920
6921                 /* Disable Full Login after LIP */
6922                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6923                 /* Enable initial LIP */
6924                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6925                 if (ql2xtgt_tape_enable)
6926                         /* Enable FC Tape support */
6927                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6928                 else
6929                         /* Disable FC Tape support */
6930                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6931
6932                 /* Disable Full Login after LIP */
6933                 nv->host_p &= cpu_to_le32(~BIT_10);
6934
6935                 /*
6936                  * clear BIT 15 explicitly as we have seen at least
6937                  * a couple of instances where this was set and this
6938                  * was causing the firmware to not be initialized.
6939                  */
6940                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6941                 /* Enable target PRLI control */
6942                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6943
6944                 if (IS_QLA25XX(ha)) {
6945                         /* Change Loop-prefer to Pt-Pt */
6946                         tmp = ~(BIT_4|BIT_5|BIT_6);
6947                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6948                         tmp = P2P << 4;
6949                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6950                 }
6951         } else {
6952                 if (ha->tgt.saved_set) {
6953                         nv->exchange_count = ha->tgt.saved_exchange_count;
6954                         nv->firmware_options_1 =
6955                             ha->tgt.saved_firmware_options_1;
6956                         nv->firmware_options_2 =
6957                             ha->tgt.saved_firmware_options_2;
6958                         nv->firmware_options_3 =
6959                             ha->tgt.saved_firmware_options_3;
6960                 }
6961                 return;
6962         }
6963
6964         if (ha->base_qpair->enable_class_2) {
6965                 if (vha->flags.init_done)
6966                         fc_host_supported_classes(vha->host) =
6967                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6968
6969                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6970         } else {
6971                 if (vha->flags.init_done)
6972                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6973
6974                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6975         }
6976 }
6977
6978 void
6979 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6980         struct init_cb_24xx *icb)
6981 {
6982         struct qla_hw_data *ha = vha->hw;
6983
6984         if (!QLA_TGT_MODE_ENABLED())
6985                 return;
6986
6987         if (ha->tgt.node_name_set) {
6988                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6989                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6990         }
6991 }
6992
6993 void
6994 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6995 {
6996         struct qla_hw_data *ha = vha->hw;
6997         u32 tmp;
6998
6999         if (!QLA_TGT_MODE_ENABLED())
7000                 return;
7001
7002         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
7003                 if (!ha->tgt.saved_set) {
7004                         /* We save only once */
7005                         ha->tgt.saved_exchange_count = nv->exchange_count;
7006                         ha->tgt.saved_firmware_options_1 =
7007                             nv->firmware_options_1;
7008                         ha->tgt.saved_firmware_options_2 =
7009                             nv->firmware_options_2;
7010                         ha->tgt.saved_firmware_options_3 =
7011                             nv->firmware_options_3;
7012                         ha->tgt.saved_set = 1;
7013                 }
7014
7015                 if (qla_tgt_mode_enabled(vha))
7016                         nv->exchange_count = cpu_to_le16(0xFFFF);
7017                 else                    /* dual */
7018                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
7019
7020                 /* Enable target mode */
7021                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
7022
7023                 /* Disable ini mode, if requested */
7024                 if (qla_tgt_mode_enabled(vha))
7025                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
7026                 /* Disable Full Login after LIP */
7027                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7028                 /* Enable initial LIP */
7029                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7030                 /*
7031                  * clear BIT 15 explicitly as we have seen at
7032                  * least a couple of instances where this was set
7033                  * and this was causing the firmware to not be
7034                  * initialized.
7035                  */
7036                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7037                 if (ql2xtgt_tape_enable)
7038                         /* Enable FC tape support */
7039                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7040                 else
7041                         /* Disable FC tape support */
7042                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7043
7044                 /* Disable Full Login after LIP */
7045                 nv->host_p &= cpu_to_le32(~BIT_10);
7046                 /* Enable target PRLI control */
7047                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7048
7049                 /* Change Loop-prefer to Pt-Pt */
7050                 tmp = ~(BIT_4|BIT_5|BIT_6);
7051                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7052                 tmp = P2P << 4;
7053                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7054         } else {
7055                 if (ha->tgt.saved_set) {
7056                         nv->exchange_count = ha->tgt.saved_exchange_count;
7057                         nv->firmware_options_1 =
7058                             ha->tgt.saved_firmware_options_1;
7059                         nv->firmware_options_2 =
7060                             ha->tgt.saved_firmware_options_2;
7061                         nv->firmware_options_3 =
7062                             ha->tgt.saved_firmware_options_3;
7063                 }
7064                 return;
7065         }
7066
7067         if (ha->base_qpair->enable_class_2) {
7068                 if (vha->flags.init_done)
7069                         fc_host_supported_classes(vha->host) =
7070                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7071
7072                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7073         } else {
7074                 if (vha->flags.init_done)
7075                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7076
7077                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7078         }
7079 }
7080
7081 void
7082 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7083         struct init_cb_81xx *icb)
7084 {
7085         struct qla_hw_data *ha = vha->hw;
7086
7087         if (!QLA_TGT_MODE_ENABLED())
7088                 return;
7089
7090         if (ha->tgt.node_name_set) {
7091                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7092                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7093         }
7094 }
7095
7096 void
7097 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7098 {
7099         if (!QLA_TGT_MODE_ENABLED())
7100                 return;
7101
7102         ha->msix_count += 1; /* For ATIO Q */
7103 }
7104
7105
7106 void
7107 qlt_modify_vp_config(struct scsi_qla_host *vha,
7108         struct vp_config_entry_24xx *vpmod)
7109 {
7110         /* enable target mode.  Bit5 = 1 => disable */
7111         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7112                 vpmod->options_idx1 &= ~BIT_5;
7113
7114         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7115         if (qla_tgt_mode_enabled(vha))
7116                 vpmod->options_idx1 &= ~BIT_4;
7117 }
7118
7119 void
7120 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7121 {
7122         int rc;
7123
7124         if (!QLA_TGT_MODE_ENABLED())
7125                 return;
7126
7127         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
7128             IS_QLA28XX(ha)) {
7129                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7130                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7131         } else {
7132                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7133                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7134         }
7135
7136         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7137         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7138
7139         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7140         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7141             qlt_unknown_atio_work_fn);
7142
7143         qlt_clear_mode(base_vha);
7144
7145         rc = btree_init32(&ha->tgt.host_map);
7146         if (rc)
7147                 ql_log(ql_log_info, base_vha, 0xd03d,
7148                     "Unable to initialize ha->host_map btree\n");
7149
7150         qlt_update_vp_map(base_vha, SET_VP_IDX);
7151 }
7152
7153 irqreturn_t
7154 qla83xx_msix_atio_q(int irq, void *dev_id)
7155 {
7156         struct rsp_que *rsp;
7157         scsi_qla_host_t *vha;
7158         struct qla_hw_data *ha;
7159         unsigned long flags;
7160
7161         rsp = (struct rsp_que *) dev_id;
7162         ha = rsp->hw;
7163         vha = pci_get_drvdata(ha->pdev);
7164
7165         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7166
7167         qlt_24xx_process_atio_queue(vha, 0);
7168
7169         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7170
7171         return IRQ_HANDLED;
7172 }
7173
7174 static void
7175 qlt_handle_abts_recv_work(struct work_struct *work)
7176 {
7177         struct qla_tgt_sess_op *op = container_of(work,
7178                 struct qla_tgt_sess_op, work);
7179         scsi_qla_host_t *vha = op->vha;
7180         struct qla_hw_data *ha = vha->hw;
7181         unsigned long flags;
7182
7183         if (qla2x00_reset_active(vha) ||
7184             (op->chip_reset != ha->base_qpair->chip_reset))
7185                 return;
7186
7187         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7188         qlt_24xx_process_atio_queue(vha, 0);
7189         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7190
7191         spin_lock_irqsave(&ha->hardware_lock, flags);
7192         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7193         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7194
7195         kfree(op);
7196 }
7197
7198 void
7199 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7200     response_t *pkt)
7201 {
7202         struct qla_tgt_sess_op *op;
7203
7204         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7205
7206         if (!op) {
7207                 /* do not reach for ATIO queue here.  This is best effort err
7208                  * recovery at this point.
7209                  */
7210                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7211                 return;
7212         }
7213
7214         memcpy(&op->atio, pkt, sizeof(*pkt));
7215         op->vha = vha;
7216         op->chip_reset = vha->hw->base_qpair->chip_reset;
7217         op->rsp = rsp;
7218         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7219         queue_work(qla_tgt_wq, &op->work);
7220         return;
7221 }
7222
7223 int
7224 qlt_mem_alloc(struct qla_hw_data *ha)
7225 {
7226         if (!QLA_TGT_MODE_ENABLED())
7227                 return 0;
7228
7229         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7230                                      sizeof(struct qla_tgt_vp_map),
7231                                      GFP_KERNEL);
7232         if (!ha->tgt.tgt_vp_map)
7233                 return -ENOMEM;
7234
7235         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7236             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7237             &ha->tgt.atio_dma, GFP_KERNEL);
7238         if (!ha->tgt.atio_ring) {
7239                 kfree(ha->tgt.tgt_vp_map);
7240                 return -ENOMEM;
7241         }
7242         return 0;
7243 }
7244
7245 void
7246 qlt_mem_free(struct qla_hw_data *ha)
7247 {
7248         if (!QLA_TGT_MODE_ENABLED())
7249                 return;
7250
7251         if (ha->tgt.atio_ring) {
7252                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7253                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7254                     ha->tgt.atio_dma);
7255         }
7256         ha->tgt.atio_ring = NULL;
7257         ha->tgt.atio_dma = 0;
7258         kfree(ha->tgt.tgt_vp_map);
7259         ha->tgt.tgt_vp_map = NULL;
7260 }
7261
7262 /* vport_slock to be held by the caller */
7263 void
7264 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7265 {
7266         void *slot;
7267         u32 key;
7268         int rc;
7269
7270         if (!QLA_TGT_MODE_ENABLED())
7271                 return;
7272
7273         key = vha->d_id.b24;
7274
7275         switch (cmd) {
7276         case SET_VP_IDX:
7277                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7278                 break;
7279         case SET_AL_PA:
7280                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7281                 if (!slot) {
7282                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7283                             "Save vha in host_map %p %06x\n", vha, key);
7284                         rc = btree_insert32(&vha->hw->tgt.host_map,
7285                                 key, vha, GFP_ATOMIC);
7286                         if (rc)
7287                                 ql_log(ql_log_info, vha, 0xd03e,
7288                                     "Unable to insert s_id into host_map: %06x\n",
7289                                     key);
7290                         return;
7291                 }
7292                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7293                     "replace existing vha in host_map %p %06x\n", vha, key);
7294                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7295                 break;
7296         case RESET_VP_IDX:
7297                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7298                 break;
7299         case RESET_AL_PA:
7300                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7301                    "clear vha in host_map %p %06x\n", vha, key);
7302                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7303                 if (slot)
7304                         btree_remove32(&vha->hw->tgt.host_map, key);
7305                 vha->d_id.b24 = 0;
7306                 break;
7307         }
7308 }
7309
7310 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7311 {
7312
7313         if (!vha->d_id.b24) {
7314                 vha->d_id = id;
7315                 qlt_update_vp_map(vha, SET_AL_PA);
7316         } else if (vha->d_id.b24 != id.b24) {
7317                 qlt_update_vp_map(vha, RESET_AL_PA);
7318                 vha->d_id = id;
7319                 qlt_update_vp_map(vha, SET_AL_PA);
7320         }
7321 }
7322
7323 static int __init qlt_parse_ini_mode(void)
7324 {
7325         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7326                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7327         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7328                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7329         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7330                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7331         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7332                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7333         else
7334                 return false;
7335
7336         return true;
7337 }
7338
7339 int __init qlt_init(void)
7340 {
7341         int ret;
7342
7343         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7344         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7345
7346         if (!qlt_parse_ini_mode()) {
7347                 ql_log(ql_log_fatal, NULL, 0xe06b,
7348                     "qlt_parse_ini_mode() failed\n");
7349                 return -EINVAL;
7350         }
7351
7352         if (!QLA_TGT_MODE_ENABLED())
7353                 return 0;
7354
7355         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7356             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7357             qla_tgt_mgmt_cmd), 0, NULL);
7358         if (!qla_tgt_mgmt_cmd_cachep) {
7359                 ql_log(ql_log_fatal, NULL, 0xd04b,
7360                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7361                 return -ENOMEM;
7362         }
7363
7364         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7365             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7366             0, NULL);
7367
7368         if (!qla_tgt_plogi_cachep) {
7369                 ql_log(ql_log_fatal, NULL, 0xe06d,
7370                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7371                 ret = -ENOMEM;
7372                 goto out_mgmt_cmd_cachep;
7373         }
7374
7375         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7376             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7377         if (!qla_tgt_mgmt_cmd_mempool) {
7378                 ql_log(ql_log_fatal, NULL, 0xe06e,
7379                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7380                 ret = -ENOMEM;
7381                 goto out_plogi_cachep;
7382         }
7383
7384         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7385         if (!qla_tgt_wq) {
7386                 ql_log(ql_log_fatal, NULL, 0xe06f,
7387                     "alloc_workqueue for qla_tgt_wq failed\n");
7388                 ret = -ENOMEM;
7389                 goto out_cmd_mempool;
7390         }
7391         /*
7392          * Return 1 to signal that initiator-mode is being disabled
7393          */
7394         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7395
7396 out_cmd_mempool:
7397         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7398 out_plogi_cachep:
7399         kmem_cache_destroy(qla_tgt_plogi_cachep);
7400 out_mgmt_cmd_cachep:
7401         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7402         return ret;
7403 }
7404
7405 void qlt_exit(void)
7406 {
7407         if (!QLA_TGT_MODE_ENABLED())
7408                 return;
7409
7410         destroy_workqueue(qla_tgt_wq);
7411         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7412         kmem_cache_destroy(qla_tgt_plogi_cachep);
7413         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7414 }