drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  59         "when ready "
  60         "\"enabled\" (default) - initiator mode will always stay enabled.");
  61
  62 static int ql_dm_tgt_ex_pct = 0;
  63 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  64 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  65         "For Dual Mode (qlini_mode=dual), this parameter determines "
  66         "the percentage of exchanges/cmds FW will allocate resources "
  67         "for Target mode.");
  68
  69 int ql2xuctrlirq = 1;
  70 module_param(ql2xuctrlirq, int, 0644);
  71 MODULE_PARM_DESC(ql2xuctrlirq,
  72     "User to control IRQ placement via smp_affinity."
  73     "Valid with qlini_mode=disabled."
  74     "1(default): enable");
  75
  76 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  77
  78 static int qla_sam_status = SAM_STAT_BUSY;
  79 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  80
  81 /*
  82  * From scsi/fc/fc_fcp.h
  83  */
  84 enum fcp_resp_rsp_codes {
  85         FCP_TMF_CMPL = 0,
  86         FCP_DATA_LEN_INVALID = 1,
  87         FCP_CMND_FIELDS_INVALID = 2,
  88         FCP_DATA_PARAM_MISMATCH = 3,
  89         FCP_TMF_REJECTED = 4,
  90         FCP_TMF_FAILED = 5,
  91         FCP_TMF_INVALID_LUN = 9,
  92 };
  93
  94 /*
  95  * fc_pri_ta from scsi/fc/fc_fcp.h
  96  */
  97 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  98 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  99 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
 100 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
 101 #define FCP_PTA_MASK        7   /* mask for task attribute field */
 102 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
 103 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
 104
 105 /*
 106  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
 107  * must be called under HW lock and could unlock/lock it inside.
 108  * It isn't an issue, since in the current implementation on the time when
 109  * those functions are called:
 110  *
 111  *   - Either context is IRQ and only IRQ handler can modify HW data,
 112  *     including rings related fields,
 113  *
 114  *   - Or access to target mode variables from struct qla_tgt doesn't
 115  *     cross those functions boundaries, except tgt_stop, which
 116  *     additionally protected by irq_cmd_count.
 117  */
 118 /* Predefs for callbacks handed to qla2xxx LLD */
 119 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 120         struct atio_from_isp *pkt, uint8_t);
 121 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 122         response_t *pkt);
 123 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 124         int fn, void *iocb, int flags);
 125 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 126         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 127 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 128         struct atio_from_isp *atio, uint16_t status, int qfull);
 129 static void qlt_disable_vha(struct scsi_qla_host *vha);
 130 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 131 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 132         struct imm_ntfy_from_isp *ntfy,
 133         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 134         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 135 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 136         struct imm_ntfy_from_isp *imm, int ha_locked);
 137 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 138         fc_port_t *fcport, bool local);
 139 void qlt_unreg_sess(struct fc_port *sess);
 140 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 141         struct abts_recv_from_24xx *);
 142 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 143     uint16_t);
 144
 145 /*
 146  * Global Variables
 147  */
 148 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 149 struct kmem_cache *qla_tgt_plogi_cachep;
 150 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 151 static struct workqueue_struct *qla_tgt_wq;
 152 static DEFINE_MUTEX(qla_tgt_mutex);
 153 static LIST_HEAD(qla_tgt_glist);
 154
 155 static const char *prot_op_str(u32 prot_op)
 156 {
 157         switch (prot_op) {
 158         case TARGET_PROT_NORMAL:        return "NORMAL";
 159         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 160         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 161         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 162         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 163         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 164         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 165         default:                        return "UNKNOWN";
 166         }
 167 }
 168
 169 /* This API intentionally takes dest as a parameter, rather than returning
 170  * int value to avoid caller forgetting to issue wmb() after the store */
 171 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 172 {
 173         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 174         *dest = atomic_inc_return(&base_vha->generation_tick);
 175         /* memory barrier */
 176         wmb();
 177 }
 178
 179 /* Might release hw lock, then reaquire!! */
 180 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 181 {
 182         /* Send marker if required */
 183         if (unlikely(vha->marker_needed != 0)) {
 184                 int rc = qla2x00_issue_marker(vha, vha_locked);
 185                 if (rc != QLA_SUCCESS) {
 186                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 187                             "qla_target(%d): issue_marker() failed\n",
 188                             vha->vp_idx);
 189                 }
 190                 return rc;
 191         }
 192         return QLA_SUCCESS;
 193 }
 194
 195 static inline
 196 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 197         uint8_t *d_id)
 198 {
 199         struct scsi_qla_host *host;
 200         uint32_t key = 0;
 201
 202         if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
 203             (vha->d_id.b.al_pa == d_id[2]))
 204                 return vha;
 205
 206         key  = (uint32_t)d_id[0] << 16;
 207         key |= (uint32_t)d_id[1] <<  8;
 208         key |= (uint32_t)d_id[2];
 209
 210         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 211         if (!host)
 212                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 213                     "Unable to find host %06x\n", key);
 214
 215         return host;
 216 }
 217
 218 static inline
 219 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 220         uint16_t vp_idx)
 221 {
 222         struct qla_hw_data *ha = vha->hw;
 223
 224         if (vha->vp_idx == vp_idx)
 225                 return vha;
 226
 227         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 228         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 229                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 230
 231         return NULL;
 232 }
 233
 234 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 235 {
 236         unsigned long flags;
 237
 238         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 239
 240         vha->hw->tgt.num_pend_cmds++;
 241         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 242                 vha->qla_stats.stat_max_pend_cmds =
 243                         vha->hw->tgt.num_pend_cmds;
 244         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 245 }
 246 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 247 {
 248         unsigned long flags;
 249
 250         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 251         vha->hw->tgt.num_pend_cmds--;
 252         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 253 }
 254
 255
 256 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 257         struct atio_from_isp *atio, uint8_t ha_locked)
 258 {
 259         struct qla_tgt_sess_op *u;
 260         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 261         unsigned long flags;
 262
 263         if (tgt->tgt_stop) {
 264                 ql_dbg(ql_dbg_async, vha, 0x502c,
 265                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 266                     vha->vp_idx);
 267                 goto out_term;
 268         }
 269
 270         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 271         if (u == NULL)
 272                 goto out_term;
 273
 274         u->vha = vha;
 275         memcpy(&u->atio, atio, sizeof(*atio));
 276         INIT_LIST_HEAD(&u->cmd_list);
 277
 278         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 279         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 280         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 281
 282         schedule_delayed_work(&vha->unknown_atio_work, 1);
 283
 284 out:
 285         return;
 286
 287 out_term:
 288         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 289         goto out;
 290 }
 291
 292 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 293         uint8_t ha_locked)
 294 {
 295         struct qla_tgt_sess_op *u, *t;
 296         scsi_qla_host_t *host;
 297         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 298         unsigned long flags;
 299         uint8_t queued = 0;
 300
 301         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 302                 if (u->aborted) {
 303                         ql_dbg(ql_dbg_async, vha, 0x502e,
 304                             "Freeing unknown %s %p, because of Abort\n",
 305                             "ATIO_TYPE7", u);
 306                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 307                             &u->atio, ha_locked, 0);
 308                         goto abort;
 309                 }
 310
 311                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 312                 if (host != NULL) {
 313                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 314                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 315                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 316                 } else if (tgt->tgt_stop) {
 317                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 318                             "Freeing unknown %s %p, because tgt is being stopped\n",
 319                             "ATIO_TYPE7", u);
 320                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 321                             &u->atio, ha_locked, 0);
 322                 } else {
 323                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 324                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 325                         if (!queued) {
 326                                 queued = 1;
 327                                 schedule_delayed_work(&vha->unknown_atio_work,
 328                                     1);
 329                         }
 330                         continue;
 331                 }
 332
 333 abort:
 334                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 335                 list_del(&u->cmd_list);
 336                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 337                 kfree(u);
 338         }
 339 }
 340
 341 void qlt_unknown_atio_work_fn(struct work_struct *work)
 342 {
 343         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 344             struct scsi_qla_host, unknown_atio_work);
 345
 346         qlt_try_to_dequeue_unknown_atios(vha, 0);
 347 }
 348
 349 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 350         struct atio_from_isp *atio, uint8_t ha_locked)
 351 {
 352         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 353                 "%s: qla_target(%d): type %x ox_id %04x\n",
 354                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 355                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 356
 357         switch (atio->u.raw.entry_type) {
 358         case ATIO_TYPE7:
 359         {
 360                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 361                     atio->u.isp24.fcp_hdr.d_id);
 362                 if (unlikely(NULL == host)) {
 363                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 364                             "qla_target(%d): Received ATIO_TYPE7 "
 365                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 366                             atio->u.isp24.fcp_hdr.d_id[0],
 367                             atio->u.isp24.fcp_hdr.d_id[1],
 368                             atio->u.isp24.fcp_hdr.d_id[2]);
 369
 370
 371                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 372                         break;
 373                 }
 374                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 375                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 376
 377                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 378                 break;
 379         }
 380
 381         case IMMED_NOTIFY_TYPE:
 382         {
 383                 struct scsi_qla_host *host = vha;
 384                 struct imm_ntfy_from_isp *entry =
 385                     (struct imm_ntfy_from_isp *)atio;
 386
 387                 qlt_issue_marker(vha, ha_locked);
 388
 389                 if ((entry->u.isp24.vp_index != 0xFF) &&
 390                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 391                         host = qlt_find_host_by_vp_idx(vha,
 392                             entry->u.isp24.vp_index);
 393                         if (unlikely(!host)) {
 394                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 395                                     "qla_target(%d): Received "
 396                                     "ATIO (IMMED_NOTIFY_TYPE) "
 397                                     "with unknown vp_index %d\n",
 398                                     vha->vp_idx, entry->u.isp24.vp_index);
 399                                 break;
 400                         }
 401                 }
 402                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 403                 break;
 404         }
 405
 406         case VP_RPT_ID_IOCB_TYPE:
 407                 qla24xx_report_id_acquisition(vha,
 408                         (struct vp_rpt_id_entry_24xx *)atio);
 409                 break;
 410
 411         case ABTS_RECV_24XX:
 412         {
 413                 struct abts_recv_from_24xx *entry =
 414                         (struct abts_recv_from_24xx *)atio;
 415                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 416                         entry->vp_index);
 417                 unsigned long flags;
 418
 419                 if (unlikely(!host)) {
 420                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 421                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 422                             "received, with unknown vp_index %d\n",
 423                             vha->vp_idx, entry->vp_index);
 424                         break;
 425                 }
 426                 if (!ha_locked)
 427                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 428                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 429                 if (!ha_locked)
 430                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 431                 break;
 432         }
 433
 434         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 435
 436         default:
 437                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 438                     "qla_target(%d): Received unknown ATIO atio "
 439                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 440                 break;
 441         }
 442
 443         return false;
 444 }
 445
 446 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 447         struct rsp_que *rsp, response_t *pkt)
 448 {
 449         switch (pkt->entry_type) {
 450         case CTIO_CRC2:
 451                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 452                         "qla_target(%d):%s: CRC2 Response pkt\n",
 453                         vha->vp_idx, __func__);
 454                 /* fall through */
 455         case CTIO_TYPE7:
 456         {
 457                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 458                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 459                     entry->vp_index);
 460                 if (unlikely(!host)) {
 461                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 462                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 463                             "received, with unknown vp_index %d\n",
 464                             vha->vp_idx, entry->vp_index);
 465                         break;
 466                 }
 467                 qlt_response_pkt(host, rsp, pkt);
 468                 break;
 469         }
 470
 471         case IMMED_NOTIFY_TYPE:
 472         {
 473                 struct scsi_qla_host *host = vha;
 474                 struct imm_ntfy_from_isp *entry =
 475                     (struct imm_ntfy_from_isp *)pkt;
 476
 477                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 478                 if (unlikely(!host)) {
 479                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 480                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 481                             "received, with unknown vp_index %d\n",
 482                             vha->vp_idx, entry->u.isp24.vp_index);
 483                         break;
 484                 }
 485                 qlt_response_pkt(host, rsp, pkt);
 486                 break;
 487         }
 488
 489         case NOTIFY_ACK_TYPE:
 490         {
 491                 struct scsi_qla_host *host = vha;
 492                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 493
 494                 if (0xFF != entry->u.isp24.vp_index) {
 495                         host = qlt_find_host_by_vp_idx(vha,
 496                             entry->u.isp24.vp_index);
 497                         if (unlikely(!host)) {
 498                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 499                                     "qla_target(%d): Response "
 500                                     "pkt (NOTIFY_ACK_TYPE) "
 501                                     "received, with unknown "
 502                                     "vp_index %d\n", vha->vp_idx,
 503                                     entry->u.isp24.vp_index);
 504                                 break;
 505                         }
 506                 }
 507                 qlt_response_pkt(host, rsp, pkt);
 508                 break;
 509         }
 510
 511         case ABTS_RECV_24XX:
 512         {
 513                 struct abts_recv_from_24xx *entry =
 514                     (struct abts_recv_from_24xx *)pkt;
 515                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 516                     entry->vp_index);
 517                 if (unlikely(!host)) {
 518                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 519                             "qla_target(%d): Response pkt "
 520                             "(ABTS_RECV_24XX) received, with unknown "
 521                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 522                         break;
 523                 }
 524                 qlt_response_pkt(host, rsp, pkt);
 525                 break;
 526         }
 527
 528         case ABTS_RESP_24XX:
 529         {
 530                 struct abts_resp_to_24xx *entry =
 531                     (struct abts_resp_to_24xx *)pkt;
 532                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 533                     entry->vp_index);
 534                 if (unlikely(!host)) {
 535                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 536                             "qla_target(%d): Response pkt "
 537                             "(ABTS_RECV_24XX) received, with unknown "
 538                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 539                         break;
 540                 }
 541                 qlt_response_pkt(host, rsp, pkt);
 542                 break;
 543         }
 544
 545         default:
 546                 qlt_response_pkt(vha, rsp, pkt);
 547                 break;
 548         }
 549
 550 }
 551
 552 /*
 553  * All qlt_plogi_ack_t operations are protected by hardware_lock
 554  */
 555 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 556         struct imm_ntfy_from_isp *ntfy, int type)
 557 {
 558         struct qla_work_evt *e;
 559         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 560         if (!e)
 561                 return QLA_FUNCTION_FAILED;
 562
 563         e->u.nack.fcport = fcport;
 564         e->u.nack.type = type;
 565         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 566         return qla2x00_post_work(vha, e);
 567 }
 568
 569 static
 570 void qla2x00_async_nack_sp_done(void *s, int res)
 571 {
 572         struct srb *sp = (struct srb *)s;
 573         struct scsi_qla_host *vha = sp->vha;
 574         unsigned long flags;
 575
 576         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 577             "Async done-%s res %x %8phC  type %d\n",
 578             sp->name, res, sp->fcport->port_name, sp->type);
 579
 580         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 581         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 582         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 583
 584         switch (sp->type) {
 585         case SRB_NACK_PLOGI:
 586                 sp->fcport->login_gen++;
 587                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 588                 sp->fcport->logout_on_delete = 1;
 589                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 590                 sp->fcport->send_els_logo = 0;
 591                 break;
 592
 593         case SRB_NACK_PRLI:
 594                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 595                 sp->fcport->deleted = 0;
 596                 sp->fcport->send_els_logo = 0;
 597
 598                 if (!sp->fcport->login_succ &&
 599                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 600                         sp->fcport->login_succ = 1;
 601
 602                         vha->fcport_count++;
 603
 604                         ql_dbg(ql_dbg_disc, vha, 0x20f3,
 605                             "%s %d %8phC post upd_fcport fcp_cnt %d\n",
 606                             __func__, __LINE__,
 607                             sp->fcport->port_name,
 608                             vha->fcport_count);
 609                         sp->fcport->disc_state = DSC_UPD_FCPORT;
 610                         qla24xx_post_upd_fcport_work(vha, sp->fcport);
 611                 } else {
 612                         sp->fcport->login_retry = 0;
 613                         sp->fcport->disc_state = DSC_LOGIN_COMPLETE;
 614                         sp->fcport->deleted = 0;
 615                         sp->fcport->logout_on_delete = 1;
 616                 }
 617                 break;
 618
 619         case SRB_NACK_LOGO:
 620                 sp->fcport->login_gen++;
 621                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 622                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 623                 break;
 624         }
 625         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 626
 627         sp->free(sp);
 628 }
 629
 630 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 631         struct imm_ntfy_from_isp *ntfy, int type)
 632 {
 633         int rval = QLA_FUNCTION_FAILED;
 634         srb_t *sp;
 635         char *c = NULL;
 636
 637         fcport->flags |= FCF_ASYNC_SENT;
 638         switch (type) {
 639         case SRB_NACK_PLOGI:
 640                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 641                 c = "PLOGI";
 642                 break;
 643         case SRB_NACK_PRLI:
 644                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 645                 fcport->deleted = 0;
 646                 c = "PRLI";
 647                 break;
 648         case SRB_NACK_LOGO:
 649                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 650                 c = "LOGO";
 651                 break;
 652         }
 653
 654         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 655         if (!sp)
 656                 goto done;
 657
 658         sp->type = type;
 659         sp->name = "nack";
 660
 661         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 662         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 663
 664         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 665         sp->done = qla2x00_async_nack_sp_done;
 666
 667         rval = qla2x00_start_sp(sp);
 668         if (rval != QLA_SUCCESS)
 669                 goto done_free_sp;
 670
 671         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 672             "Async-%s %8phC hndl %x %s\n",
 673             sp->name, fcport->port_name, sp->handle, c);
 674
 675         return rval;
 676
 677 done_free_sp:
 678         sp->free(sp);
 679 done:
 680         fcport->flags &= ~FCF_ASYNC_SENT;
 681         return rval;
 682 }
 683
 684 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 685 {
 686         fc_port_t *t;
 687         unsigned long flags;
 688
 689         switch (e->u.nack.type) {
 690         case SRB_NACK_PRLI:
 691                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 692                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 693                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 694                 if (t) {
 695                         ql_log(ql_log_info, vha, 0xd034,
 696                             "%s create sess success %p", __func__, t);
 697                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 698                         /* create sess has an extra kref */
 699                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 700                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 701                 }
 702                 break;
 703         }
 704         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 705             (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
 706 }
 707
 708 void qla24xx_delete_sess_fn(struct work_struct *work)
 709 {
 710         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 711         struct qla_hw_data *ha = fcport->vha->hw;
 712         unsigned long flags;
 713
 714         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 715
 716         if (fcport->se_sess) {
 717                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 718                 ha->tgt.tgt_ops->put_sess(fcport);
 719         } else {
 720                 qlt_unreg_sess(fcport);
 721         }
 722         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 723 }
 724
 725 /*
 726  * Called from qla2x00_reg_remote_port()
 727  */
 728 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 729 {
 730         struct qla_hw_data *ha = vha->hw;
 731         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 732         struct fc_port *sess = fcport;
 733         unsigned long flags;
 734
 735         if (!vha->hw->tgt.tgt_ops)
 736                 return;
 737
 738         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 739         if (tgt->tgt_stop) {
 740                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 741                 return;
 742         }
 743
 744         if (fcport->disc_state == DSC_DELETE_PEND) {
 745                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 746                 return;
 747         }
 748
 749         if (!sess->se_sess) {
 750                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 751
 752                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 753                 sess = qlt_create_sess(vha, fcport, false);
 754                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 755
 756                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 757         } else {
 758                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 759                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 760                         return;
 761                 }
 762
 763                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 764                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 765                             "%s: kref_get fail sess %8phC \n",
 766                             __func__, sess->port_name);
 767                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 768                         return;
 769                 }
 770
 771                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 772                     "qla_target(%u): %ssession for port %8phC "
 773                     "(loop ID %d) reappeared\n", vha->vp_idx,
 774                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 775
 776                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 777                     "Reappeared sess %p\n", sess);
 778
 779                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 780                     fcport->loop_id,
 781                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 782         }
 783
 784         if (sess && sess->local) {
 785                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 786                     "qla_target(%u): local session for "
 787                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 788                     fcport->port_name, sess->loop_id);
 789                 sess->local = 0;
 790         }
 791         ha->tgt.tgt_ops->put_sess(sess);
 792         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 793 }
 794
 795 /*
 796  * This is a zero-base ref-counting solution, since hardware_lock
 797  * guarantees that ref_count is not modified concurrently.
 798  * Upon successful return content of iocb is undefined
 799  */
 800 static struct qlt_plogi_ack_t *
 801 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 802                        struct imm_ntfy_from_isp *iocb)
 803 {
 804         struct qlt_plogi_ack_t *pla;
 805
 806         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 807                 if (pla->id.b24 == id->b24) {
 808                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 809                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 810                         return pla;
 811                 }
 812         }
 813
 814         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 815         if (!pla) {
 816                 ql_dbg(ql_dbg_async, vha, 0x5088,
 817                        "qla_target(%d): Allocation of plogi_ack failed\n",
 818                        vha->vp_idx);
 819                 return NULL;
 820         }
 821
 822         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 823         pla->id = *id;
 824         list_add_tail(&pla->list, &vha->plogi_ack_list);
 825
 826         return pla;
 827 }
 828
 829 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 830     struct qlt_plogi_ack_t *pla)
 831 {
 832         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 833         port_id_t port_id;
 834         uint16_t loop_id;
 835         fc_port_t *fcport = pla->fcport;
 836
 837         BUG_ON(!pla->ref_count);
 838         pla->ref_count--;
 839
 840         if (pla->ref_count)
 841                 return;
 842
 843         ql_dbg(ql_dbg_disc, vha, 0x5089,
 844             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 845             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 846             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 847             iocb->u.isp24.port_id[0],
 848             le16_to_cpu(iocb->u.isp24.nport_handle),
 849             iocb->u.isp24.exchange_address, iocb->ox_id);
 850
 851         port_id.b.domain = iocb->u.isp24.port_id[2];
 852         port_id.b.area   = iocb->u.isp24.port_id[1];
 853         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 854         port_id.b.rsvd_1 = 0;
 855
 856         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 857
 858         fcport->loop_id = loop_id;
 859         fcport->d_id = port_id;
 860         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 861                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 862         else
 863                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 864
 865         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 866                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 867                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 868                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 869                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 870         }
 871
 872         list_del(&pla->list);
 873         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 874 }
 875
 876 void
 877 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 878     struct fc_port *sess, enum qlt_plogi_link_t link)
 879 {
 880         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 881         /* Inc ref_count first because link might already be pointing at pla */
 882         pla->ref_count++;
 883
 884         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 885                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 886                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 887                 sess, link, sess->port_name,
 888                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 889                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 890                 pla->ref_count, pla, link);
 891
 892         if (link == QLT_PLOGI_LINK_CONFLICT) {
 893                 switch (sess->disc_state) {
 894                 case DSC_DELETED:
 895                 case DSC_DELETE_PEND:
 896                         pla->ref_count--;
 897                         return;
 898                 default:
 899                         break;
 900                 }
 901         }
 902
 903         if (sess->plogi_link[link])
 904                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 905
 906         if (link == QLT_PLOGI_LINK_SAME_WWN)
 907                 pla->fcport = sess;
 908
 909         sess->plogi_link[link] = pla;
 910 }
 911
 912 typedef struct {
 913         /* These fields must be initialized by the caller */
 914         port_id_t id;
 915         /*
 916          * number of cmds dropped while we were waiting for
 917          * initiator to ack LOGO initialize to 1 if LOGO is
 918          * triggered by a command, otherwise, to 0
 919          */
 920         int cmd_count;
 921
 922         /* These fields are used by callee */
 923         struct list_head list;
 924 } qlt_port_logo_t;
 925
 926 static void
 927 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 928 {
 929         qlt_port_logo_t *tmp;
 930         int res;
 931
 932         mutex_lock(&vha->vha_tgt.tgt_mutex);
 933
 934         list_for_each_entry(tmp, &vha->logo_list, list) {
 935                 if (tmp->id.b24 == logo->id.b24) {
 936                         tmp->cmd_count += logo->cmd_count;
 937                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 938                         return;
 939                 }
 940         }
 941
 942         list_add_tail(&logo->list, &vha->logo_list);
 943
 944         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 945
 946         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 947
 948         mutex_lock(&vha->vha_tgt.tgt_mutex);
 949         list_del(&logo->list);
 950         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 951
 952         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 953             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 954             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 955             logo->cmd_count, res);
 956 }
 957
 958 void qlt_free_session_done(struct work_struct *work)
 959 {
 960         struct fc_port *sess = container_of(work, struct fc_port,
 961             free_work);
 962         struct qla_tgt *tgt = sess->tgt;
 963         struct scsi_qla_host *vha = sess->vha;
 964         struct qla_hw_data *ha = vha->hw;
 965         unsigned long flags;
 966         bool logout_started = false;
 967         scsi_qla_host_t *base_vha;
 968         struct qlt_plogi_ack_t *own =
 969                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 970
 971         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 972                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 973                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 974                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 975                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 976                 sess->logout_on_delete, sess->keep_nport_handle,
 977                 sess->send_els_logo);
 978
 979         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 980                 if (sess->send_els_logo) {
 981                         qlt_port_logo_t logo;
 982
 983                         logo.id = sess->d_id;
 984                         logo.cmd_count = 0;
 985                         sess->send_els_logo = 0;
 986                         qlt_send_first_logo(vha, &logo);
 987                 }
 988
 989                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 990                         int rc;
 991
 992                         if (!own ||
 993                             (own &&
 994                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
 995                                 rc = qla2x00_post_async_logout_work(vha, sess,
 996                                     NULL);
 997                                 if (rc != QLA_SUCCESS)
 998                                         ql_log(ql_log_warn, vha, 0xf085,
 999                                             "Schedule logo failed sess %p rc %d\n",
1000                                             sess, rc);
1001                                 else
1002                                         logout_started = true;
1003                         } else if (own && (own->iocb.u.isp24.status_subcode ==
1004                                 ELS_PRLI) && ha->flags.rida_fmt2) {
1005                                 rc = qla2x00_post_async_prlo_work(vha, sess,
1006                                     NULL);
1007                                 if (rc != QLA_SUCCESS)
1008                                         ql_log(ql_log_warn, vha, 0xf085,
1009                                             "Schedule PRLO failed sess %p rc %d\n",
1010                                             sess, rc);
1011                                 else
1012                                         logout_started = true;
1013                         }
1014                 }
1015         }
1016
1017         /*
1018          * Release the target session for FC Nexus from fabric module code.
1019          */
1020         if (sess->se_sess != NULL)
1021                 ha->tgt.tgt_ops->free_session(sess);
1022
1023         if (logout_started) {
1024                 bool traced = false;
1025
1026                 while (!READ_ONCE(sess->logout_completed)) {
1027                         if (!traced) {
1028                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1029                                         "%s: waiting for sess %p logout\n",
1030                                         __func__, sess);
1031                                 traced = true;
1032                         }
1033                         msleep(100);
1034                 }
1035
1036                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1037                     "%s: sess %p logout completed\n", __func__, sess);
1038         }
1039
1040         if (sess->logo_ack_needed) {
1041                 sess->logo_ack_needed = 0;
1042                 qla24xx_async_notify_ack(vha, sess,
1043                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1044         }
1045
1046         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1047         if (sess->se_sess) {
1048                 sess->se_sess = NULL;
1049                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1050                         tgt->sess_count--;
1051         }
1052
1053         sess->disc_state = DSC_DELETED;
1054         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1055         sess->deleted = QLA_SESS_DELETED;
1056         sess->login_retry = vha->hw->login_retry_count;
1057
1058         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1059                 vha->fcport_count--;
1060                 sess->login_succ = 0;
1061         }
1062
1063         qla2x00_clear_loop_id(sess);
1064
1065         if (sess->conflict) {
1066                 sess->conflict->login_pause = 0;
1067                 sess->conflict = NULL;
1068                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1069                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1070         }
1071
1072         {
1073                 struct qlt_plogi_ack_t *con =
1074                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1075                 struct imm_ntfy_from_isp *iocb;
1076
1077                 if (con) {
1078                         iocb = &con->iocb;
1079                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1080                                  "se_sess %p / sess %p port %8phC is gone,"
1081                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1082                                  sess->se_sess, sess, sess->port_name,
1083                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1084                                  own ? own->ref_count : -1,
1085                                  iocb->u.isp24.port_name, con->ref_count);
1086                         qlt_plogi_ack_unref(vha, con);
1087                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1088                 } else {
1089                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1090                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1091                             sess->se_sess, sess, sess->port_name,
1092                             own ? "releasing own PLOGI" :
1093                             "no own PLOGI pending",
1094                             own ? own->ref_count : -1);
1095                 }
1096
1097                 if (own) {
1098                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1099                         qlt_plogi_ack_unref(vha, own);
1100                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1101                 }
1102         }
1103
1104         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1105
1106         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1107             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1108                 sess, sess->port_name, vha->fcport_count);
1109
1110         if (tgt && (tgt->sess_count == 0))
1111                 wake_up_all(&tgt->waitQ);
1112
1113         if (vha->fcport_count == 0)
1114                 wake_up_all(&vha->fcport_waitQ);
1115
1116         base_vha = pci_get_drvdata(ha->pdev);
1117
1118         sess->free_pending = 0;
1119
1120         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1121                 return;
1122
1123         if ((!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1124                 switch (vha->host->active_mode) {
1125                 case MODE_INITIATOR:
1126                 case MODE_DUAL:
1127                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1128                         qla2xxx_wake_dpc(vha);
1129                         break;
1130                 case MODE_TARGET:
1131                 default:
1132                         /* no-op */
1133                         break;
1134                 }
1135         }
1136 }
1137
1138 /* ha->tgt.sess_lock supposed to be held on entry */
1139 void qlt_unreg_sess(struct fc_port *sess)
1140 {
1141         struct scsi_qla_host *vha = sess->vha;
1142         unsigned long flags;
1143
1144         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1145             "%s sess %p for deletion %8phC\n",
1146             __func__, sess, sess->port_name);
1147
1148         spin_lock_irqsave(&sess->vha->work_lock, flags);
1149         if (sess->free_pending) {
1150                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1151                 return;
1152         }
1153         sess->free_pending = 1;
1154         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1155
1156         if (sess->se_sess)
1157                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1158
1159         qla2x00_mark_device_lost(vha, sess, 1, 1);
1160
1161         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1162         sess->disc_state = DSC_DELETE_PEND;
1163         sess->last_rscn_gen = sess->rscn_gen;
1164         sess->last_login_gen = sess->login_gen;
1165
1166         if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1167             !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1168                 sess->nvme_flag |= NVME_FLAG_DELETING;
1169                 schedule_work(&sess->nvme_del_work);
1170         } else {
1171                 INIT_WORK(&sess->free_work, qlt_free_session_done);
1172                 schedule_work(&sess->free_work);
1173         }
1174 }
1175 EXPORT_SYMBOL(qlt_unreg_sess);
1176
1177 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1178 {
1179         struct qla_hw_data *ha = vha->hw;
1180         struct fc_port *sess = NULL;
1181         uint16_t loop_id;
1182         int res = 0;
1183         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1184         unsigned long flags;
1185
1186         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1187         if (loop_id == 0xFFFF) {
1188                 /* Global event */
1189                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1190                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1191                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1192                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1193         } else {
1194                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1195                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1196                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1197         }
1198
1199         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1200             "Using sess for qla_tgt_reset: %p\n", sess);
1201         if (!sess) {
1202                 res = -ESRCH;
1203                 return res;
1204         }
1205
1206         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1207             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1208             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1209             mcmd, loop_id);
1210
1211         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1212 }
1213
1214 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1215 {
1216         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1217                 sess->logout_on_delete = 0;
1218                 sess->logo_ack_needed = 0;
1219                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1220                 sess->scan_state = 0;
1221         }
1222 }
1223
1224 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1225 {
1226         struct qla_tgt *tgt = sess->tgt;
1227         unsigned long flags;
1228
1229         if (sess->disc_state == DSC_DELETE_PEND)
1230                 return;
1231
1232         if (sess->disc_state == DSC_DELETED) {
1233                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1234                         wake_up_all(&tgt->waitQ);
1235                 if (sess->vha->fcport_count == 0)
1236                         wake_up_all(&sess->vha->fcport_waitQ);
1237
1238                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1239                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1240                         return;
1241         }
1242
1243         if (sess->deleted == QLA_SESS_DELETED)
1244                 sess->logout_on_delete = 0;
1245
1246         spin_lock_irqsave(&sess->vha->work_lock, flags);
1247         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1248                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1249                 return;
1250         }
1251         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1252         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1253
1254         sess->disc_state = DSC_DELETE_PEND;
1255
1256         qla24xx_chk_fcp_state(sess);
1257
1258         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1259             "Scheduling sess %p for deletion\n", sess);
1260
1261         INIT_WORK(&sess->del_work, qla24xx_delete_sess_fn);
1262         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1263 }
1264
1265 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1266 {
1267         struct fc_port *sess;
1268         scsi_qla_host_t *vha = tgt->vha;
1269
1270         list_for_each_entry(sess, &vha->vp_fcports, list) {
1271                 if (sess->se_sess)
1272                         qlt_schedule_sess_for_deletion(sess);
1273         }
1274
1275         /* At this point tgt could be already dead */
1276 }
1277
1278 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1279         uint16_t *loop_id)
1280 {
1281         struct qla_hw_data *ha = vha->hw;
1282         dma_addr_t gid_list_dma;
1283         struct gid_list_info *gid_list;
1284         char *id_iter;
1285         int res, rc, i;
1286         uint16_t entries;
1287
1288         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1289             &gid_list_dma, GFP_KERNEL);
1290         if (!gid_list) {
1291                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1292                     "qla_target(%d): DMA Alloc failed of %u\n",
1293                     vha->vp_idx, qla2x00_gid_list_size(ha));
1294                 return -ENOMEM;
1295         }
1296
1297         /* Get list of logged in devices */
1298         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1299         if (rc != QLA_SUCCESS) {
1300                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1301                     "qla_target(%d): get_id_list() failed: %x\n",
1302                     vha->vp_idx, rc);
1303                 res = -EBUSY;
1304                 goto out_free_id_list;
1305         }
1306
1307         id_iter = (char *)gid_list;
1308         res = -ENOENT;
1309         for (i = 0; i < entries; i++) {
1310                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1311                 if ((gid->al_pa == s_id[2]) &&
1312                     (gid->area == s_id[1]) &&
1313                     (gid->domain == s_id[0])) {
1314                         *loop_id = le16_to_cpu(gid->loop_id);
1315                         res = 0;
1316                         break;
1317                 }
1318                 id_iter += ha->gid_list_info_size;
1319         }
1320
1321 out_free_id_list:
1322         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1323             gid_list, gid_list_dma);
1324         return res;
1325 }
1326
1327 /*
1328  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1329  * Caller must put it.
1330  */
1331 static struct fc_port *qlt_create_sess(
1332         struct scsi_qla_host *vha,
1333         fc_port_t *fcport,
1334         bool local)
1335 {
1336         struct qla_hw_data *ha = vha->hw;
1337         struct fc_port *sess = fcport;
1338         unsigned long flags;
1339
1340         if (vha->vha_tgt.qla_tgt->tgt_stop)
1341                 return NULL;
1342
1343         if (fcport->se_sess) {
1344                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1345                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1346                             "%s: kref_get_unless_zero failed for %8phC\n",
1347                             __func__, sess->port_name);
1348                         return NULL;
1349                 }
1350                 return fcport;
1351         }
1352         sess->tgt = vha->vha_tgt.qla_tgt;
1353         sess->local = local;
1354
1355         /*
1356          * Under normal circumstances we want to logout from firmware when
1357          * session eventually ends and release corresponding nport handle.
1358          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1359          * code will adjust these flags as necessary.
1360          */
1361         sess->logout_on_delete = 1;
1362         sess->keep_nport_handle = 0;
1363         sess->logout_completed = 0;
1364
1365         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1366             &fcport->port_name[0], sess) < 0) {
1367                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1368                     "(%d) %8phC check_initiator_node_acl failed\n",
1369                     vha->vp_idx, fcport->port_name);
1370                 return NULL;
1371         } else {
1372                 kref_init(&fcport->sess_kref);
1373                 /*
1374                  * Take an extra reference to ->sess_kref here to handle
1375                  * fc_port access across ->tgt.sess_lock reaquire.
1376                  */
1377                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1378                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1379                             "%s: kref_get_unless_zero failed for %8phC\n",
1380                             __func__, sess->port_name);
1381                         return NULL;
1382                 }
1383
1384                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1385                 if (!IS_SW_RESV_ADDR(sess->d_id))
1386                         vha->vha_tgt.qla_tgt->sess_count++;
1387
1388                 qlt_do_generation_tick(vha, &sess->generation);
1389                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1390         }
1391
1392         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1393             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1394             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1395             vha->vha_tgt.qla_tgt->sess_count);
1396
1397         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1398             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1399             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1400             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1401             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1402             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1403
1404         return sess;
1405 }
1406
1407 /*
1408  * max_gen - specifies maximum session generation
1409  * at which this deletion requestion is still valid
1410  */
1411 void
1412 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1413 {
1414         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1415         struct fc_port *sess = fcport;
1416         unsigned long flags;
1417
1418         if (!vha->hw->tgt.tgt_ops)
1419                 return;
1420
1421         if (!tgt)
1422                 return;
1423
1424         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1425         if (tgt->tgt_stop) {
1426                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1427                 return;
1428         }
1429         if (!sess->se_sess) {
1430                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1431                 return;
1432         }
1433
1434         if (max_gen - sess->generation < 0) {
1435                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1436                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1437                     "Ignoring stale deletion request for se_sess %p / sess %p"
1438                     " for port %8phC, req_gen %d, sess_gen %d\n",
1439                     sess->se_sess, sess, sess->port_name, max_gen,
1440                     sess->generation);
1441                 return;
1442         }
1443
1444         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1445
1446         sess->local = 1;
1447         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1448         qlt_schedule_sess_for_deletion(sess);
1449 }
1450
1451 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1452 {
1453         struct qla_hw_data *ha = tgt->ha;
1454         unsigned long flags;
1455         int res;
1456         /*
1457          * We need to protect against race, when tgt is freed before or
1458          * inside wake_up()
1459          */
1460         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1461         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1462             "tgt %p, sess_count=%d\n",
1463             tgt, tgt->sess_count);
1464         res = (tgt->sess_count == 0);
1465         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1466
1467         return res;
1468 }
1469
1470 /* Called by tcm_qla2xxx configfs code */
1471 int qlt_stop_phase1(struct qla_tgt *tgt)
1472 {
1473         struct scsi_qla_host *vha = tgt->vha;
1474         struct qla_hw_data *ha = tgt->ha;
1475         unsigned long flags;
1476
1477         mutex_lock(&qla_tgt_mutex);
1478         if (!vha->fc_vport) {
1479                 struct Scsi_Host *sh = vha->host;
1480                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1481                 bool npiv_vports;
1482
1483                 spin_lock_irqsave(sh->host_lock, flags);
1484                 npiv_vports = (fc_host->npiv_vports_inuse);
1485                 spin_unlock_irqrestore(sh->host_lock, flags);
1486
1487                 if (npiv_vports) {
1488                         mutex_unlock(&qla_tgt_mutex);
1489                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
1490                             "NPIV is in use. Can not stop target\n");
1491                         return -EPERM;
1492                 }
1493         }
1494         if (tgt->tgt_stop || tgt->tgt_stopped) {
1495                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1496                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1497                 mutex_unlock(&qla_tgt_mutex);
1498                 return -EPERM;
1499         }
1500
1501         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1502             vha->host_no, vha);
1503         /*
1504          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1505          * Lock is needed, because we still can get an incoming packet.
1506          */
1507         mutex_lock(&vha->vha_tgt.tgt_mutex);
1508         tgt->tgt_stop = 1;
1509         qlt_clear_tgt_db(tgt);
1510         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1511         mutex_unlock(&qla_tgt_mutex);
1512
1513         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1514             "Waiting for sess works (tgt %p)", tgt);
1515         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1516         while (!list_empty(&tgt->sess_works_list)) {
1517                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1518                 flush_scheduled_work();
1519                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1520         }
1521         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1522
1523         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1524             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1525
1526         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1527
1528         /* Big hammer */
1529         if (!ha->flags.host_shutting_down &&
1530             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1531                 qlt_disable_vha(vha);
1532
1533         /* Wait for sessions to clear out (just in case) */
1534         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1535         return 0;
1536 }
1537 EXPORT_SYMBOL(qlt_stop_phase1);
1538
1539 /* Called by tcm_qla2xxx configfs code */
1540 void qlt_stop_phase2(struct qla_tgt *tgt)
1541 {
1542         scsi_qla_host_t *vha = tgt->vha;
1543
1544         if (tgt->tgt_stopped) {
1545                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1546                     "Already in tgt->tgt_stopped state\n");
1547                 dump_stack();
1548                 return;
1549         }
1550         if (!tgt->tgt_stop) {
1551                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1552                     "%s: phase1 stop is not completed\n", __func__);
1553                 dump_stack();
1554                 return;
1555         }
1556
1557         mutex_lock(&vha->vha_tgt.tgt_mutex);
1558         tgt->tgt_stop = 0;
1559         tgt->tgt_stopped = 1;
1560         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1561
1562         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1563             tgt);
1564 }
1565 EXPORT_SYMBOL(qlt_stop_phase2);
1566
1567 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1568 static void qlt_release(struct qla_tgt *tgt)
1569 {
1570         scsi_qla_host_t *vha = tgt->vha;
1571         void *node;
1572         u64 key = 0;
1573         u16 i;
1574         struct qla_qpair_hint *h;
1575         struct qla_hw_data *ha = vha->hw;
1576
1577         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
1578             !tgt->tgt_stopped)
1579                 qlt_stop_phase1(tgt);
1580
1581         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1582                 qlt_stop_phase2(tgt);
1583
1584         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1585                 unsigned long flags;
1586
1587                 h = &tgt->qphints[i];
1588                 if (h->qpair) {
1589                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1590                         list_del(&h->hint_elem);
1591                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1592                         h->qpair = NULL;
1593                 }
1594         }
1595         kfree(tgt->qphints);
1596         mutex_lock(&qla_tgt_mutex);
1597         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1598         mutex_unlock(&qla_tgt_mutex);
1599
1600         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1601                 btree_remove64(&tgt->lun_qpair_map, key);
1602
1603         btree_destroy64(&tgt->lun_qpair_map);
1604
1605         if (vha->vp_idx)
1606                 if (ha->tgt.tgt_ops &&
1607                     ha->tgt.tgt_ops->remove_target &&
1608                     vha->vha_tgt.target_lport_ptr)
1609                         ha->tgt.tgt_ops->remove_target(vha);
1610
1611         vha->vha_tgt.qla_tgt = NULL;
1612
1613         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1614             "Release of tgt %p finished\n", tgt);
1615
1616         kfree(tgt);
1617 }
1618
1619 /* ha->hardware_lock supposed to be held on entry */
1620 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1621         const void *param, unsigned int param_size)
1622 {
1623         struct qla_tgt_sess_work_param *prm;
1624         unsigned long flags;
1625
1626         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1627         if (!prm) {
1628                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1629                     "qla_target(%d): Unable to create session "
1630                     "work, command will be refused", 0);
1631                 return -ENOMEM;
1632         }
1633
1634         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1635             "Scheduling work (type %d, prm %p)"
1636             " to find session for param %p (size %d, tgt %p)\n",
1637             type, prm, param, param_size, tgt);
1638
1639         prm->type = type;
1640         memcpy(&prm->tm_iocb, param, param_size);
1641
1642         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1643         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1644         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1645
1646         schedule_work(&tgt->sess_work);
1647
1648         return 0;
1649 }
1650
1651 /*
1652  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1653  */
1654 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1655         struct imm_ntfy_from_isp *ntfy,
1656         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1657         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1658 {
1659         struct scsi_qla_host *vha = qpair->vha;
1660         struct qla_hw_data *ha = vha->hw;
1661         request_t *pkt;
1662         struct nack_to_isp *nack;
1663
1664         if (!ha->flags.fw_started)
1665                 return;
1666
1667         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1668
1669         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1670         if (!pkt) {
1671                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1672                     "qla_target(%d): %s failed: unable to allocate "
1673                     "request packet\n", vha->vp_idx, __func__);
1674                 return;
1675         }
1676
1677         if (vha->vha_tgt.qla_tgt != NULL)
1678                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1679
1680         pkt->entry_type = NOTIFY_ACK_TYPE;
1681         pkt->entry_count = 1;
1682
1683         nack = (struct nack_to_isp *)pkt;
1684         nack->ox_id = ntfy->ox_id;
1685
1686         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1687         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1688         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1689                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1690                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1691         }
1692         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1693         nack->u.isp24.status = ntfy->u.isp24.status;
1694         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1695         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1696         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1697         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1698         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1699         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1700         nack->u.isp24.srr_reject_code = srr_reject_code;
1701         nack->u.isp24.srr_reject_code_expl = srr_explan;
1702         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1703
1704         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1705             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1706             vha->vp_idx, nack->u.isp24.status);
1707
1708         /* Memory Barrier */
1709         wmb();
1710         qla2x00_start_iocbs(vha, qpair->req);
1711 }
1712
1713 /*
1714  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1715  */
1716 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1717         struct abts_recv_from_24xx *abts, uint32_t status,
1718         bool ids_reversed)
1719 {
1720         struct scsi_qla_host *vha = qpair->vha;
1721         struct qla_hw_data *ha = vha->hw;
1722         struct abts_resp_to_24xx *resp;
1723         uint32_t f_ctl;
1724         uint8_t *p;
1725
1726         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1727             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1728             ha, abts, status);
1729
1730         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1731             NULL);
1732         if (!resp) {
1733                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1734                     "qla_target(%d): %s failed: unable to allocate "
1735                     "request packet", vha->vp_idx, __func__);
1736                 return;
1737         }
1738
1739         resp->entry_type = ABTS_RESP_24XX;
1740         resp->entry_count = 1;
1741         resp->nport_handle = abts->nport_handle;
1742         resp->vp_index = vha->vp_idx;
1743         resp->sof_type = abts->sof_type;
1744         resp->exchange_address = abts->exchange_address;
1745         resp->fcp_hdr_le = abts->fcp_hdr_le;
1746         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1747             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1748             F_CTL_SEQ_INITIATIVE);
1749         p = (uint8_t *)&f_ctl;
1750         resp->fcp_hdr_le.f_ctl[0] = *p++;
1751         resp->fcp_hdr_le.f_ctl[1] = *p++;
1752         resp->fcp_hdr_le.f_ctl[2] = *p;
1753         if (ids_reversed) {
1754                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1755                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1756                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1757                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1758                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1759                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1760         } else {
1761                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1762                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1763                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1764                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1765                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1766                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1767         }
1768         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1769         if (status == FCP_TMF_CMPL) {
1770                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1771                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1772                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1773                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1774                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1775                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1776         } else {
1777                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1778                 resp->payload.ba_rjt.reason_code =
1779                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1780                 /* Other bytes are zero */
1781         }
1782
1783         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1784
1785         /* Memory Barrier */
1786         wmb();
1787         if (qpair->reqq_start_iocbs)
1788                 qpair->reqq_start_iocbs(qpair);
1789         else
1790                 qla2x00_start_iocbs(vha, qpair->req);
1791 }
1792
1793 /*
1794  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1795  */
1796 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1797         struct abts_resp_from_24xx_fw *entry)
1798 {
1799         struct ctio7_to_24xx *ctio;
1800
1801         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1802             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1803
1804         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(
1805             vha->hw->base_qpair, NULL);
1806         if (ctio == NULL) {
1807                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1808                     "qla_target(%d): %s failed: unable to allocate "
1809                     "request packet\n", vha->vp_idx, __func__);
1810                 return;
1811         }
1812
1813         /*
1814          * We've got on entrance firmware's response on by us generated
1815          * ABTS response. So, in it ID fields are reversed.
1816          */
1817
1818         ctio->entry_type = CTIO_TYPE7;
1819         ctio->entry_count = 1;
1820         ctio->nport_handle = entry->nport_handle;
1821         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1822         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1823         ctio->vp_index = vha->vp_idx;
1824         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1825         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1826         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1827         ctio->exchange_addr = entry->exchange_addr_to_abort;
1828         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1829                                             CTIO7_FLAGS_TERMINATE);
1830         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1831
1832         /* Memory Barrier */
1833         wmb();
1834         qla2x00_start_iocbs(vha, vha->req);
1835
1836         qlt_24xx_send_abts_resp(vha->hw->base_qpair,
1837             (struct abts_recv_from_24xx *)entry,
1838             FCP_TMF_CMPL, true);
1839 }
1840
1841 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1842 {
1843         struct qla_tgt_sess_op *op;
1844         struct qla_tgt_cmd *cmd;
1845         unsigned long flags;
1846
1847         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1848         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1849                 if (tag == op->atio.u.isp24.exchange_addr) {
1850                         op->aborted = true;
1851                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1852                         return 1;
1853                 }
1854         }
1855
1856         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1857                 if (tag == op->atio.u.isp24.exchange_addr) {
1858                         op->aborted = true;
1859                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1860                         return 1;
1861                 }
1862         }
1863
1864         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1865                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1866                         cmd->aborted = 1;
1867                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1868                         return 1;
1869                 }
1870         }
1871         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1872
1873         return 0;
1874 }
1875
1876 /* drop cmds for the given lun
1877  * XXX only looks for cmds on the port through which lun reset was recieved
1878  * XXX does not go through the list of other port (which may have cmds
1879  *     for the same lun)
1880  */
1881 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1882                                 u64 lun, uint8_t *s_id)
1883 {
1884         struct qla_tgt_sess_op *op;
1885         struct qla_tgt_cmd *cmd;
1886         uint32_t key;
1887         unsigned long flags;
1888
1889         key = sid_to_key(s_id);
1890         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1891         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1892                 uint32_t op_key;
1893                 u64 op_lun;
1894
1895                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1896                 op_lun = scsilun_to_int(
1897                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1898                 if (op_key == key && op_lun == lun)
1899                         op->aborted = true;
1900         }
1901
1902         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1903                 uint32_t op_key;
1904                 u64 op_lun;
1905
1906                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1907                 op_lun = scsilun_to_int(
1908                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1909                 if (op_key == key && op_lun == lun)
1910                         op->aborted = true;
1911         }
1912
1913         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1914                 uint32_t cmd_key;
1915                 u64 cmd_lun;
1916
1917                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1918                 cmd_lun = scsilun_to_int(
1919                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1920                 if (cmd_key == key && cmd_lun == lun)
1921                         cmd->aborted = 1;
1922         }
1923         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1924 }
1925
1926 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
1927     uint64_t unpacked_lun)
1928 {
1929         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1930         struct qla_qpair_hint *h = NULL;
1931
1932         if (vha->flags.qpairs_available) {
1933                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
1934                 if (!h)
1935                         h = &tgt->qphints[0];
1936         } else {
1937                 h = &tgt->qphints[0];
1938         }
1939
1940         return h;
1941 }
1942
1943 static void qlt_do_tmr_work(struct work_struct *work)
1944 {
1945         struct qla_tgt_mgmt_cmd *mcmd =
1946                 container_of(work, struct qla_tgt_mgmt_cmd, work);
1947         struct qla_hw_data *ha = mcmd->vha->hw;
1948         int rc = EIO;
1949         uint32_t tag;
1950         unsigned long flags;
1951
1952         switch (mcmd->tmr_func) {
1953         case QLA_TGT_ABTS:
1954                 tag = mcmd->orig_iocb.abts.exchange_addr_to_abort;
1955                 break;
1956         default:
1957                 tag = 0;
1958                 break;
1959         }
1960
1961         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
1962             mcmd->tmr_func, tag);
1963
1964         if (rc != 0) {
1965                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
1966                 switch (mcmd->tmr_func) {
1967                 case QLA_TGT_ABTS:
1968                         qlt_24xx_send_abts_resp(mcmd->qpair,
1969                             &mcmd->orig_iocb.abts,
1970                             FCP_TMF_REJECTED, false);
1971                         break;
1972                 case QLA_TGT_LUN_RESET:
1973                 case QLA_TGT_CLEAR_TS:
1974                 case QLA_TGT_ABORT_TS:
1975                 case QLA_TGT_CLEAR_ACA:
1976                 case QLA_TGT_TARGET_RESET:
1977                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
1978                             qla_sam_status);
1979                         break;
1980
1981                 case QLA_TGT_ABORT_ALL:
1982                 case QLA_TGT_NEXUS_LOSS_SESS:
1983                 case QLA_TGT_NEXUS_LOSS:
1984                         qlt_send_notify_ack(mcmd->qpair,
1985                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
1986                         break;
1987                 }
1988                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
1989
1990                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
1991                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
1992                     mcmd->vha->vp_idx, rc);
1993                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1994         }
1995 }
1996
1997 /* ha->hardware_lock supposed to be held on entry */
1998 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1999         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2000 {
2001         struct qla_hw_data *ha = vha->hw;
2002         struct qla_tgt_mgmt_cmd *mcmd;
2003         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2004
2005         if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
2006                 /* send TASK_ABORT response immediately */
2007                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false);
2008                 return 0;
2009         }
2010
2011         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2012             "qla_target(%d): task abort (tag=%d)\n",
2013             vha->vp_idx, abts->exchange_addr_to_abort);
2014
2015         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2016         if (mcmd == NULL) {
2017                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2018                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2019                     vha->vp_idx, __func__);
2020                 return -ENOMEM;
2021         }
2022         memset(mcmd, 0, sizeof(*mcmd));
2023
2024         mcmd->sess = sess;
2025         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2026         mcmd->reset_count = ha->base_qpair->chip_reset;
2027         mcmd->tmr_func = QLA_TGT_ABTS;
2028         mcmd->qpair = h->qpair;
2029         mcmd->vha = vha;
2030
2031         /*
2032          * LUN is looked up by target-core internally based on the passed
2033          * abts->exchange_addr_to_abort tag.
2034          */
2035         mcmd->se_cmd.cpuid = h->cpuid;
2036
2037         if (ha->tgt.tgt_ops->find_cmd_by_tag) {
2038                 struct qla_tgt_cmd *abort_cmd;
2039
2040                 abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2041                     abts->exchange_addr_to_abort);
2042                 if (abort_cmd && abort_cmd->qpair) {
2043                         mcmd->qpair = abort_cmd->qpair;
2044                         mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2045                 }
2046         }
2047
2048         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2049         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2050
2051         return 0;
2052 }
2053
2054 /*
2055  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2056  */
2057 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2058         struct abts_recv_from_24xx *abts)
2059 {
2060         struct qla_hw_data *ha = vha->hw;
2061         struct fc_port *sess;
2062         uint32_t tag = abts->exchange_addr_to_abort;
2063         uint8_t s_id[3];
2064         int rc;
2065         unsigned long flags;
2066
2067         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2068                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2069                     "qla_target(%d): ABTS: Abort Sequence not "
2070                     "supported\n", vha->vp_idx);
2071                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2072                     false);
2073                 return;
2074         }
2075
2076         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2077                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2078                     "qla_target(%d): ABTS: Unknown Exchange "
2079                     "Address received\n", vha->vp_idx);
2080                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2081                     false);
2082                 return;
2083         }
2084
2085         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2086             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2087             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
2088             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
2089             le32_to_cpu(abts->fcp_hdr_le.parameter));
2090
2091         s_id[0] = abts->fcp_hdr_le.s_id[2];
2092         s_id[1] = abts->fcp_hdr_le.s_id[1];
2093         s_id[2] = abts->fcp_hdr_le.s_id[0];
2094
2095         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2096         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2097         if (!sess) {
2098                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2099                     "qla_target(%d): task abort for non-existent session\n",
2100                     vha->vp_idx);
2101                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2102
2103                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2104                             false);
2105                 return;
2106         }
2107         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2108
2109
2110         if (sess->deleted) {
2111                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2112                     false);
2113                 return;
2114         }
2115
2116         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2117         if (rc != 0) {
2118                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2119                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2120                     vha->vp_idx, rc);
2121                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2122                     false);
2123                 return;
2124         }
2125 }
2126
2127 /*
2128  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2129  */
2130 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2131         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2132 {
2133         struct scsi_qla_host *ha = mcmd->vha;
2134         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2135         struct ctio7_to_24xx *ctio;
2136         uint16_t temp;
2137
2138         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2139             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2140             ha, atio, resp_code);
2141
2142
2143         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2144         if (ctio == NULL) {
2145                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2146                     "qla_target(%d): %s failed: unable to allocate "
2147                     "request packet\n", ha->vp_idx, __func__);
2148                 return;
2149         }
2150
2151         ctio->entry_type = CTIO_TYPE7;
2152         ctio->entry_count = 1;
2153         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2154         ctio->nport_handle = mcmd->sess->loop_id;
2155         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2156         ctio->vp_index = ha->vp_idx;
2157         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2158         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2159         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2160         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2161         temp = (atio->u.isp24.attr << 9)|
2162                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2163         ctio->u.status1.flags = cpu_to_le16(temp);
2164         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2165         ctio->u.status1.ox_id = cpu_to_le16(temp);
2166         ctio->u.status1.scsi_status =
2167             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2168         ctio->u.status1.response_len = cpu_to_le16(8);
2169         ctio->u.status1.sense_data[0] = resp_code;
2170
2171         /* Memory Barrier */
2172         wmb();
2173         if (qpair->reqq_start_iocbs)
2174                 qpair->reqq_start_iocbs(qpair);
2175         else
2176                 qla2x00_start_iocbs(ha, qpair->req);
2177 }
2178
2179 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2180 {
2181         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2182 }
2183 EXPORT_SYMBOL(qlt_free_mcmd);
2184
2185 /*
2186  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2187  * reacquire
2188  */
2189 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2190     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2191 {
2192         struct atio_from_isp *atio = &cmd->atio;
2193         struct ctio7_to_24xx *ctio;
2194         uint16_t temp;
2195         struct scsi_qla_host *vha = cmd->vha;
2196
2197         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2198             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2199             "sense_key=%02x, asc=%02x, ascq=%02x",
2200             vha, atio, scsi_status, sense_key, asc, ascq);
2201
2202         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2203         if (!ctio) {
2204                 ql_dbg(ql_dbg_async, vha, 0x3067,
2205                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2206                     vha->host_no, __func__);
2207                 goto out;
2208         }
2209
2210         ctio->entry_type = CTIO_TYPE7;
2211         ctio->entry_count = 1;
2212         ctio->handle = QLA_TGT_SKIP_HANDLE;
2213         ctio->nport_handle = cmd->sess->loop_id;
2214         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2215         ctio->vp_index = vha->vp_idx;
2216         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2217         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2218         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2219         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2220         temp = (atio->u.isp24.attr << 9) |
2221             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2222         ctio->u.status1.flags = cpu_to_le16(temp);
2223         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2224         ctio->u.status1.ox_id = cpu_to_le16(temp);
2225         ctio->u.status1.scsi_status =
2226             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2227         ctio->u.status1.response_len = cpu_to_le16(18);
2228         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2229
2230         if (ctio->u.status1.residual != 0)
2231                 ctio->u.status1.scsi_status |=
2232                     cpu_to_le16(SS_RESIDUAL_UNDER);
2233
2234         /* Response code and sense key */
2235         put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
2236             (&ctio->u.status1.sense_data)[0]);
2237         /* Additional sense length */
2238         put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
2239         /* ASC and ASCQ */
2240         put_unaligned_le32(((asc << 24) | (ascq << 16)),
2241             (&ctio->u.status1.sense_data)[3]);
2242
2243         /* Memory Barrier */
2244         wmb();
2245
2246         if (qpair->reqq_start_iocbs)
2247                 qpair->reqq_start_iocbs(qpair);
2248         else
2249                 qla2x00_start_iocbs(vha, qpair->req);
2250
2251 out:
2252         return;
2253 }
2254
2255 /* callback from target fabric module code */
2256 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2257 {
2258         struct scsi_qla_host *vha = mcmd->sess->vha;
2259         struct qla_hw_data *ha = vha->hw;
2260         unsigned long flags;
2261         struct qla_qpair *qpair = mcmd->qpair;
2262
2263         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2264             "TM response mcmd (%p) status %#x state %#x",
2265             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2266
2267         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2268
2269         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2270                 /*
2271                  * Either the port is not online or this request was from
2272                  * previous life, just abort the processing.
2273                  */
2274                 ql_dbg(ql_dbg_async, vha, 0xe100,
2275                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2276                         vha->flags.online, qla2x00_reset_active(vha),
2277                         mcmd->reset_count, qpair->chip_reset);
2278                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2279                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2280                 return;
2281         }
2282
2283         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2284                 if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2285                     ELS_LOGO ||
2286                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2287                     ELS_PRLO ||
2288                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2289                     ELS_TPRLO) {
2290                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2291                             "TM response logo %phC status %#x state %#x",
2292                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2293                             mcmd->flags);
2294                         qlt_schedule_sess_for_deletion(mcmd->sess);
2295                 } else {
2296                         qlt_send_notify_ack(vha->hw->base_qpair,
2297                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2298                 }
2299         } else {
2300                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2301                         qlt_24xx_send_abts_resp(qpair, &mcmd->orig_iocb.abts,
2302                             mcmd->fc_tm_rsp, false);
2303                 else
2304                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2305                             mcmd->fc_tm_rsp);
2306         }
2307         /*
2308          * Make the callback for ->free_mcmd() to queue_work() and invoke
2309          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2310          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2311          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2312          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2313          * qlt_xmit_tm_rsp() returns here..
2314          */
2315         ha->tgt.tgt_ops->free_mcmd(mcmd);
2316         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2317 }
2318 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2319
2320 /* No locks */
2321 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2322 {
2323         struct qla_tgt_cmd *cmd = prm->cmd;
2324
2325         BUG_ON(cmd->sg_cnt == 0);
2326
2327         prm->sg = (struct scatterlist *)cmd->sg;
2328         prm->seg_cnt = pci_map_sg(cmd->qpair->pdev, cmd->sg,
2329             cmd->sg_cnt, cmd->dma_data_direction);
2330         if (unlikely(prm->seg_cnt == 0))
2331                 goto out_err;
2332
2333         prm->cmd->sg_mapped = 1;
2334
2335         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2336                 /*
2337                  * If greater than four sg entries then we need to allocate
2338                  * the continuation entries
2339                  */
2340                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2341                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2342                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2343                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2344         } else {
2345                 /* DIF */
2346                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2347                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2348                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2349                         prm->tot_dsds = prm->seg_cnt;
2350                 } else
2351                         prm->tot_dsds = prm->seg_cnt;
2352
2353                 if (cmd->prot_sg_cnt) {
2354                         prm->prot_sg      = cmd->prot_sg;
2355                         prm->prot_seg_cnt = pci_map_sg(cmd->qpair->pdev,
2356                                 cmd->prot_sg, cmd->prot_sg_cnt,
2357                                 cmd->dma_data_direction);
2358                         if (unlikely(prm->prot_seg_cnt == 0))
2359                                 goto out_err;
2360
2361                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2362                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2363                                 /* Dif Bundling not support here */
2364                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2365                                                                 cmd->blk_sz);
2366                                 prm->tot_dsds += prm->prot_seg_cnt;
2367                         } else
2368                                 prm->tot_dsds += prm->prot_seg_cnt;
2369                 }
2370         }
2371
2372         return 0;
2373
2374 out_err:
2375         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2376             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2377             0, prm->cmd->sg_cnt);
2378         return -1;
2379 }
2380
2381 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2382 {
2383         struct qla_hw_data *ha;
2384         struct qla_qpair *qpair;
2385         if (!cmd->sg_mapped)
2386                 return;
2387
2388         qpair = cmd->qpair;
2389
2390         pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt,
2391             cmd->dma_data_direction);
2392         cmd->sg_mapped = 0;
2393
2394         if (cmd->prot_sg_cnt)
2395                 pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2396                         cmd->dma_data_direction);
2397
2398         if (!cmd->ctx)
2399                 return;
2400         ha = vha->hw;
2401         if (cmd->ctx_dsd_alloced)
2402                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2403
2404         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2405 }
2406
2407 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2408         uint32_t req_cnt)
2409 {
2410         uint32_t cnt;
2411         struct req_que *req = qpair->req;
2412
2413         if (req->cnt < (req_cnt + 2)) {
2414                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2415                     RD_REG_DWORD_RELAXED(req->req_q_out));
2416
2417                 if  (req->ring_index < cnt)
2418                         req->cnt = cnt - req->ring_index;
2419                 else
2420                         req->cnt = req->length - (req->ring_index - cnt);
2421
2422                 if (unlikely(req->cnt < (req_cnt + 2)))
2423                         return -EAGAIN;
2424         }
2425
2426         req->cnt -= req_cnt;
2427
2428         return 0;
2429 }
2430
2431 /*
2432  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2433  */
2434 static inline void *qlt_get_req_pkt(struct req_que *req)
2435 {
2436         /* Adjust ring index. */
2437         req->ring_index++;
2438         if (req->ring_index == req->length) {
2439                 req->ring_index = 0;
2440                 req->ring_ptr = req->ring;
2441         } else {
2442                 req->ring_ptr++;
2443         }
2444         return (cont_entry_t *)req->ring_ptr;
2445 }
2446
2447 /* ha->hardware_lock supposed to be held on entry */
2448 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2449 {
2450         uint32_t h;
2451         int index;
2452         uint8_t found = 0;
2453         struct req_que *req = qpair->req;
2454
2455         h = req->current_outstanding_cmd;
2456
2457         for (index = 1; index < req->num_outstanding_cmds; index++) {
2458                 h++;
2459                 if (h == req->num_outstanding_cmds)
2460                         h = 1;
2461
2462                 if (h == QLA_TGT_SKIP_HANDLE)
2463                         continue;
2464
2465                 if (!req->outstanding_cmds[h]) {
2466                         found = 1;
2467                         break;
2468                 }
2469         }
2470
2471         if (found) {
2472                 req->current_outstanding_cmd = h;
2473         } else {
2474                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2475                     "qla_target(%d): Ran out of empty cmd slots\n",
2476                     qpair->vha->vp_idx);
2477                 h = QLA_TGT_NULL_HANDLE;
2478         }
2479
2480         return h;
2481 }
2482
2483 /* ha->hardware_lock supposed to be held on entry */
2484 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2485         struct qla_tgt_prm *prm)
2486 {
2487         uint32_t h;
2488         struct ctio7_to_24xx *pkt;
2489         struct atio_from_isp *atio = &prm->cmd->atio;
2490         uint16_t temp;
2491
2492         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2493         prm->pkt = pkt;
2494         memset(pkt, 0, sizeof(*pkt));
2495
2496         pkt->entry_type = CTIO_TYPE7;
2497         pkt->entry_count = (uint8_t)prm->req_cnt;
2498         pkt->vp_index = prm->cmd->vp_idx;
2499
2500         h = qlt_make_handle(qpair);
2501         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2502                 /*
2503                  * CTIO type 7 from the firmware doesn't provide a way to
2504                  * know the initiator's LOOP ID, hence we can't find
2505                  * the session and, so, the command.
2506                  */
2507                 return -EAGAIN;
2508         } else
2509                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2510
2511         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2512         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2513         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2514         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2515         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2516         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2517         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2518         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2519         temp = atio->u.isp24.attr << 9;
2520         pkt->u.status0.flags |= cpu_to_le16(temp);
2521         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2522         pkt->u.status0.ox_id = cpu_to_le16(temp);
2523         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2524
2525         return 0;
2526 }
2527
2528 /*
2529  * ha->hardware_lock supposed to be held on entry. We have already made sure
2530  * that there is sufficient amount of request entries to not drop it.
2531  */
2532 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2533 {
2534         int cnt;
2535         uint32_t *dword_ptr;
2536
2537         /* Build continuation packets */
2538         while (prm->seg_cnt > 0) {
2539                 cont_a64_entry_t *cont_pkt64 =
2540                         (cont_a64_entry_t *)qlt_get_req_pkt(
2541                            prm->cmd->qpair->req);
2542
2543                 /*
2544                  * Make sure that from cont_pkt64 none of
2545                  * 64-bit specific fields used for 32-bit
2546                  * addressing. Cast to (cont_entry_t *) for
2547                  * that.
2548                  */
2549
2550                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2551
2552                 cont_pkt64->entry_count = 1;
2553                 cont_pkt64->sys_define = 0;
2554
2555                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2556                 dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2557
2558                 /* Load continuation entry data segments */
2559                 for (cnt = 0;
2560                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2561                     cnt++, prm->seg_cnt--) {
2562                         *dword_ptr++ =
2563                             cpu_to_le32(pci_dma_lo32
2564                                 (sg_dma_address(prm->sg)));
2565                         *dword_ptr++ = cpu_to_le32(pci_dma_hi32
2566                             (sg_dma_address(prm->sg)));
2567                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2568
2569                         prm->sg = sg_next(prm->sg);
2570                 }
2571         }
2572 }
2573
2574 /*
2575  * ha->hardware_lock supposed to be held on entry. We have already made sure
2576  * that there is sufficient amount of request entries to not drop it.
2577  */
2578 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2579 {
2580         int cnt;
2581         uint32_t *dword_ptr;
2582         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2583
2584         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2585
2586         /* Setup packet address segment pointer */
2587         dword_ptr = pkt24->u.status0.dseg_0_address;
2588
2589         /* Set total data segment count */
2590         if (prm->seg_cnt)
2591                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2592
2593         if (prm->seg_cnt == 0) {
2594                 /* No data transfer */
2595                 *dword_ptr++ = 0;
2596                 *dword_ptr = 0;
2597                 return;
2598         }
2599
2600         /* If scatter gather */
2601
2602         /* Load command entry data segments */
2603         for (cnt = 0;
2604             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2605             cnt++, prm->seg_cnt--) {
2606                 *dword_ptr++ =
2607                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2608
2609                 *dword_ptr++ = cpu_to_le32(pci_dma_hi32(
2610                         sg_dma_address(prm->sg)));
2611
2612                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2613
2614                 prm->sg = sg_next(prm->sg);
2615         }
2616
2617         qlt_load_cont_data_segments(prm);
2618 }
2619
2620 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2621 {
2622         return cmd->bufflen > 0;
2623 }
2624
2625 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2626 {
2627         struct qla_tgt_cmd *cmd;
2628         struct scsi_qla_host *vha;
2629
2630         /* asc 0x10=dif error */
2631         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2632                 cmd = prm->cmd;
2633                 vha = cmd->vha;
2634                 /* ASCQ */
2635                 switch (prm->sense_buffer[13]) {
2636                 case 1:
2637                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2638                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2639                             "se_cmd=%p tag[%x]",
2640                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2641                             cmd->atio.u.isp24.exchange_addr);
2642                         break;
2643                 case 2:
2644                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2645                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2646                             "se_cmd=%p tag[%x]",
2647                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2648                             cmd->atio.u.isp24.exchange_addr);
2649                         break;
2650                 case 3:
2651                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2652                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2653                             "se_cmd=%p tag[%x]",
2654                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2655                             cmd->atio.u.isp24.exchange_addr);
2656                         break;
2657                 default:
2658                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2659                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2660                             "se_cmd=%p tag[%x]",
2661                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2662                             cmd->atio.u.isp24.exchange_addr);
2663                         break;
2664                 }
2665                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2666         }
2667 }
2668
2669 /*
2670  * Called without ha->hardware_lock held
2671  */
2672 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2673         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2674         uint32_t *full_req_cnt)
2675 {
2676         struct se_cmd *se_cmd = &cmd->se_cmd;
2677         struct qla_qpair *qpair = cmd->qpair;
2678
2679         prm->cmd = cmd;
2680         prm->tgt = cmd->tgt;
2681         prm->pkt = NULL;
2682         prm->rq_result = scsi_status;
2683         prm->sense_buffer = &cmd->sense_buffer[0];
2684         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2685         prm->sg = NULL;
2686         prm->seg_cnt = -1;
2687         prm->req_cnt = 1;
2688         prm->residual = 0;
2689         prm->add_status_pkt = 0;
2690         prm->prot_sg = NULL;
2691         prm->prot_seg_cnt = 0;
2692         prm->tot_dsds = 0;
2693
2694         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2695                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2696                         return -EAGAIN;
2697         }
2698
2699         *full_req_cnt = prm->req_cnt;
2700
2701         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2702                 prm->residual = se_cmd->residual_count;
2703                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2704                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2705                        prm->residual, se_cmd->tag,
2706                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2707                        cmd->bufflen, prm->rq_result);
2708                 prm->rq_result |= SS_RESIDUAL_UNDER;
2709         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2710                 prm->residual = se_cmd->residual_count;
2711                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2712                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2713                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2714                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2715                 prm->rq_result |= SS_RESIDUAL_OVER;
2716         }
2717
2718         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2719                 /*
2720                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2721                  * ignored in *xmit_response() below
2722                  */
2723                 if (qlt_has_data(cmd)) {
2724                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2725                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2726                             (prm->rq_result != 0))) {
2727                                 prm->add_status_pkt = 1;
2728                                 (*full_req_cnt)++;
2729                         }
2730                 }
2731         }
2732
2733         return 0;
2734 }
2735
2736 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2737     int sending_sense)
2738 {
2739         if (cmd->qpair->enable_class_2)
2740                 return 0;
2741
2742         if (sending_sense)
2743                 return cmd->conf_compl_supported;
2744         else
2745                 return cmd->qpair->enable_explicit_conf &&
2746                     cmd->conf_compl_supported;
2747 }
2748
2749 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2750         struct qla_tgt_prm *prm)
2751 {
2752         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2753             (uint32_t)sizeof(ctio->u.status1.sense_data));
2754         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2755         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2756                 ctio->u.status0.flags |= cpu_to_le16(
2757                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2758                     CTIO7_FLAGS_CONFORM_REQ);
2759         }
2760         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2761         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2762         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2763                 int i;
2764
2765                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2766                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2767                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2768                                     "Skipping EXPLICIT_CONFORM and "
2769                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2770                                     "non GOOD status\n");
2771                                 goto skip_explict_conf;
2772                         }
2773                         ctio->u.status1.flags |= cpu_to_le16(
2774                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2775                             CTIO7_FLAGS_CONFORM_REQ);
2776                 }
2777 skip_explict_conf:
2778                 ctio->u.status1.flags &=
2779                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2780                 ctio->u.status1.flags |=
2781                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2782                 ctio->u.status1.scsi_status |=
2783                     cpu_to_le16(SS_SENSE_LEN_VALID);
2784                 ctio->u.status1.sense_length =
2785                     cpu_to_le16(prm->sense_buffer_len);
2786                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2787                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2788                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2789
2790                 qlt_print_dif_err(prm);
2791
2792         } else {
2793                 ctio->u.status1.flags &=
2794                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2795                 ctio->u.status1.flags |=
2796                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2797                 ctio->u.status1.sense_length = 0;
2798                 memset(ctio->u.status1.sense_data, 0,
2799                     sizeof(ctio->u.status1.sense_data));
2800         }
2801
2802         /* Sense with len > 24, is it possible ??? */
2803 }
2804
2805 static inline int
2806 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2807 {
2808         switch (se_cmd->prot_op) {
2809         case TARGET_PROT_DOUT_INSERT:
2810         case TARGET_PROT_DIN_STRIP:
2811                 if (ql2xenablehba_err_chk >= 1)
2812                         return 1;
2813                 break;
2814         case TARGET_PROT_DOUT_PASS:
2815         case TARGET_PROT_DIN_PASS:
2816                 if (ql2xenablehba_err_chk >= 2)
2817                         return 1;
2818                 break;
2819         case TARGET_PROT_DIN_INSERT:
2820         case TARGET_PROT_DOUT_STRIP:
2821                 return 1;
2822         default:
2823                 break;
2824         }
2825         return 0;
2826 }
2827
2828 static inline int
2829 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2830 {
2831         switch (se_cmd->prot_op) {
2832         case TARGET_PROT_DIN_INSERT:
2833         case TARGET_PROT_DOUT_INSERT:
2834         case TARGET_PROT_DIN_STRIP:
2835         case TARGET_PROT_DOUT_STRIP:
2836         case TARGET_PROT_DIN_PASS:
2837         case TARGET_PROT_DOUT_PASS:
2838             return 1;
2839         default:
2840             return 0;
2841         }
2842         return 0;
2843 }
2844
2845 /*
2846  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2847  */
2848 static void
2849 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2850     uint16_t *pfw_prot_opts)
2851 {
2852         struct se_cmd *se_cmd = &cmd->se_cmd;
2853         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2854         scsi_qla_host_t *vha = cmd->tgt->vha;
2855         struct qla_hw_data *ha = vha->hw;
2856         uint32_t t32 = 0;
2857
2858         /*
2859          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2860          * have been immplemented by TCM, before AppTag is avail.
2861          * Look for modesense_handlers[]
2862          */
2863         ctx->app_tag = 0;
2864         ctx->app_tag_mask[0] = 0x0;
2865         ctx->app_tag_mask[1] = 0x0;
2866
2867         if (IS_PI_UNINIT_CAPABLE(ha)) {
2868                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2869                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2870                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2871                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2872                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2873         }
2874
2875         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2876
2877         switch (se_cmd->prot_type) {
2878         case TARGET_DIF_TYPE0_PROT:
2879                 /*
2880                  * No check for ql2xenablehba_err_chk, as it
2881                  * would be an I/O error if hba tag generation
2882                  * is not done.
2883                  */
2884                 ctx->ref_tag = cpu_to_le32(lba);
2885                 /* enable ALL bytes of the ref tag */
2886                 ctx->ref_tag_mask[0] = 0xff;
2887                 ctx->ref_tag_mask[1] = 0xff;
2888                 ctx->ref_tag_mask[2] = 0xff;
2889                 ctx->ref_tag_mask[3] = 0xff;
2890                 break;
2891         case TARGET_DIF_TYPE1_PROT:
2892             /*
2893              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2894              * REF tag, and 16 bit app tag.
2895              */
2896             ctx->ref_tag = cpu_to_le32(lba);
2897             if (!qla_tgt_ref_mask_check(se_cmd) ||
2898                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2899                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2900                     break;
2901             }
2902             /* enable ALL bytes of the ref tag */
2903             ctx->ref_tag_mask[0] = 0xff;
2904             ctx->ref_tag_mask[1] = 0xff;
2905             ctx->ref_tag_mask[2] = 0xff;
2906             ctx->ref_tag_mask[3] = 0xff;
2907             break;
2908         case TARGET_DIF_TYPE2_PROT:
2909             /*
2910              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2911              * tag has to match LBA in CDB + N
2912              */
2913             ctx->ref_tag = cpu_to_le32(lba);
2914             if (!qla_tgt_ref_mask_check(se_cmd) ||
2915                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2916                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2917                     break;
2918             }
2919             /* enable ALL bytes of the ref tag */
2920             ctx->ref_tag_mask[0] = 0xff;
2921             ctx->ref_tag_mask[1] = 0xff;
2922             ctx->ref_tag_mask[2] = 0xff;
2923             ctx->ref_tag_mask[3] = 0xff;
2924             break;
2925         case TARGET_DIF_TYPE3_PROT:
2926             /* For TYPE 3 protection: 16 bit GUARD only */
2927             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2928             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2929                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2930             break;
2931         }
2932 }
2933
2934 static inline int
2935 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2936 {
2937         uint32_t                *cur_dsd;
2938         uint32_t                transfer_length = 0;
2939         uint32_t                data_bytes;
2940         uint32_t                dif_bytes;
2941         uint8_t                 bundling = 1;
2942         struct crc_context      *crc_ctx_pkt = NULL;
2943         struct qla_hw_data      *ha;
2944         struct ctio_crc2_to_fw  *pkt;
2945         dma_addr_t              crc_ctx_dma;
2946         uint16_t                fw_prot_opts = 0;
2947         struct qla_tgt_cmd      *cmd = prm->cmd;
2948         struct se_cmd           *se_cmd = &cmd->se_cmd;
2949         uint32_t h;
2950         struct atio_from_isp *atio = &prm->cmd->atio;
2951         struct qla_tc_param     tc;
2952         uint16_t t16;
2953         scsi_qla_host_t *vha = cmd->vha;
2954
2955         ha = vha->hw;
2956
2957         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
2958         prm->pkt = pkt;
2959         memset(pkt, 0, sizeof(*pkt));
2960
2961         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
2962                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2963                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2964                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2965
2966         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2967             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2968                 bundling = 0;
2969
2970         /* Compute dif len and adjust data len to incude protection */
2971         data_bytes = cmd->bufflen;
2972         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2973
2974         switch (se_cmd->prot_op) {
2975         case TARGET_PROT_DIN_INSERT:
2976         case TARGET_PROT_DOUT_STRIP:
2977                 transfer_length = data_bytes;
2978                 if (cmd->prot_sg_cnt)
2979                         data_bytes += dif_bytes;
2980                 break;
2981         case TARGET_PROT_DIN_STRIP:
2982         case TARGET_PROT_DOUT_INSERT:
2983         case TARGET_PROT_DIN_PASS:
2984         case TARGET_PROT_DOUT_PASS:
2985                 transfer_length = data_bytes + dif_bytes;
2986                 break;
2987         default:
2988                 BUG();
2989                 break;
2990         }
2991
2992         if (!qlt_hba_err_chk_enabled(se_cmd))
2993                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2994         /* HBA error checking enabled */
2995         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2996                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2997                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2998                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2999                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3000                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3001         }
3002
3003         switch (se_cmd->prot_op) {
3004         case TARGET_PROT_DIN_INSERT:
3005         case TARGET_PROT_DOUT_INSERT:
3006                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3007                 break;
3008         case TARGET_PROT_DIN_STRIP:
3009         case TARGET_PROT_DOUT_STRIP:
3010                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3011                 break;
3012         case TARGET_PROT_DIN_PASS:
3013         case TARGET_PROT_DOUT_PASS:
3014                 fw_prot_opts |= PO_MODE_DIF_PASS;
3015                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3016                 break;
3017         default:/* Normal Request */
3018                 fw_prot_opts |= PO_MODE_DIF_PASS;
3019                 break;
3020         }
3021
3022         /* ---- PKT ---- */
3023         /* Update entry type to indicate Command Type CRC_2 IOCB */
3024         pkt->entry_type  = CTIO_CRC2;
3025         pkt->entry_count = 1;
3026         pkt->vp_index = cmd->vp_idx;
3027
3028         h = qlt_make_handle(qpair);
3029         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3030                 /*
3031                  * CTIO type 7 from the firmware doesn't provide a way to
3032                  * know the initiator's LOOP ID, hence we can't find
3033                  * the session and, so, the command.
3034                  */
3035                 return -EAGAIN;
3036         } else
3037                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3038
3039         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
3040         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3041         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3042         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3043         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3044         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3045         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3046         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3047
3048         /* silence compile warning */
3049         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3050         pkt->ox_id  = cpu_to_le16(t16);
3051
3052         t16 = (atio->u.isp24.attr << 9);
3053         pkt->flags |= cpu_to_le16(t16);
3054         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3055
3056         /* Set transfer direction */
3057         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3058                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3059         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3060                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3061
3062         pkt->dseg_count = prm->tot_dsds;
3063         /* Fibre channel byte count */
3064         pkt->transfer_length = cpu_to_le32(transfer_length);
3065
3066         /* ----- CRC context -------- */
3067
3068         /* Allocate CRC context from global pool */
3069         crc_ctx_pkt = cmd->ctx =
3070             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3071
3072         if (!crc_ctx_pkt)
3073                 goto crc_queuing_error;
3074
3075         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3076         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3077
3078         /* Set handle */
3079         crc_ctx_pkt->handle = pkt->handle;
3080
3081         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3082
3083         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
3084         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
3085         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
3086
3087         if (!bundling) {
3088                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
3089         } else {
3090                 /*
3091                  * Configure Bundling if we need to fetch interlaving
3092                  * protection PCI accesses
3093                  */
3094                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3095                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3096                 crc_ctx_pkt->u.bundling.dseg_count =
3097                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3098                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
3099         }
3100
3101         /* Finish the common fields of CRC pkt */
3102         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3103         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3104         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3105         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3106
3107         memset((uint8_t *)&tc, 0 , sizeof(tc));
3108         tc.vha = vha;
3109         tc.blk_sz = cmd->blk_sz;
3110         tc.bufflen = cmd->bufflen;
3111         tc.sg = cmd->sg;
3112         tc.prot_sg = cmd->prot_sg;
3113         tc.ctx = crc_ctx_pkt;
3114         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3115
3116         /* Walks data segments */
3117         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3118
3119         if (!bundling && prm->prot_seg_cnt) {
3120                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3121                         prm->tot_dsds, &tc))
3122                         goto crc_queuing_error;
3123         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3124                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3125                 goto crc_queuing_error;
3126
3127         if (bundling && prm->prot_seg_cnt) {
3128                 /* Walks dif segments */
3129                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3130
3131                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
3132                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3133                         prm->prot_seg_cnt, &tc))
3134                         goto crc_queuing_error;
3135         }
3136         return QLA_SUCCESS;
3137
3138 crc_queuing_error:
3139         /* Cleanup will be performed by the caller */
3140         qpair->req->outstanding_cmds[h] = NULL;
3141
3142         return QLA_FUNCTION_FAILED;
3143 }
3144
3145 /*
3146  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3147  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3148  */
3149 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3150         uint8_t scsi_status)
3151 {
3152         struct scsi_qla_host *vha = cmd->vha;
3153         struct qla_qpair *qpair = cmd->qpair;
3154         struct ctio7_to_24xx *pkt;
3155         struct qla_tgt_prm prm;
3156         uint32_t full_req_cnt = 0;
3157         unsigned long flags = 0;
3158         int res;
3159
3160         if (cmd->sess && cmd->sess->deleted) {
3161                 cmd->state = QLA_TGT_STATE_PROCESSED;
3162                 if (cmd->sess->logout_completed)
3163                         /* no need to terminate. FW already freed exchange. */
3164                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3165                 else
3166                         qlt_send_term_exchange(qpair, cmd, &cmd->atio, 0, 0);
3167                 return 0;
3168         }
3169
3170         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3171             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3172             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3173             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3174             &cmd->se_cmd, qpair->id);
3175
3176         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3177             &full_req_cnt);
3178         if (unlikely(res != 0)) {
3179                 return res;
3180         }
3181
3182         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3183
3184         if (xmit_type == QLA_TGT_XMIT_STATUS)
3185                 qpair->tgt_counters.core_qla_snd_status++;
3186         else
3187                 qpair->tgt_counters.core_qla_que_buf++;
3188
3189         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3190                 /*
3191                  * Either the port is not online or this request was from
3192                  * previous life, just abort the processing.
3193                  */
3194                 cmd->state = QLA_TGT_STATE_PROCESSED;
3195                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3196                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3197                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3198                         vha->flags.online, qla2x00_reset_active(vha),
3199                         cmd->reset_count, qpair->chip_reset);
3200                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3201                 return 0;
3202         }
3203
3204         /* Does F/W have an IOCBs for this request */
3205         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3206         if (unlikely(res))
3207                 goto out_unmap_unlock;
3208
3209         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3210                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3211         else
3212                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3213         if (unlikely(res != 0)) {
3214                 qpair->req->cnt += full_req_cnt;
3215                 goto out_unmap_unlock;
3216         }
3217
3218         pkt = (struct ctio7_to_24xx *)prm.pkt;
3219
3220         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3221                 pkt->u.status0.flags |=
3222                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3223                         CTIO7_FLAGS_STATUS_MODE_0);
3224
3225                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3226                         qlt_load_data_segments(&prm);
3227
3228                 if (prm.add_status_pkt == 0) {
3229                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3230                                 pkt->u.status0.scsi_status =
3231                                     cpu_to_le16(prm.rq_result);
3232                                 pkt->u.status0.residual =
3233                                     cpu_to_le32(prm.residual);
3234                                 pkt->u.status0.flags |= cpu_to_le16(
3235                                     CTIO7_FLAGS_SEND_STATUS);
3236                                 if (qlt_need_explicit_conf(cmd, 0)) {
3237                                         pkt->u.status0.flags |=
3238                                             cpu_to_le16(
3239                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3240                                                 CTIO7_FLAGS_CONFORM_REQ);
3241                                 }
3242                         }
3243
3244                 } else {
3245                         /*
3246                          * We have already made sure that there is sufficient
3247                          * amount of request entries to not drop HW lock in
3248                          * req_pkt().
3249                          */
3250                         struct ctio7_to_24xx *ctio =
3251                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3252                                     qpair->req);
3253
3254                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3255                             "Building additional status packet 0x%p.\n",
3256                             ctio);
3257
3258                         /*
3259                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3260                          * ctio7_to_24xx
3261                          */
3262                         memcpy(ctio, pkt, sizeof(*ctio));
3263                         /* reset back to CTIO7 */
3264                         ctio->entry_count = 1;
3265                         ctio->entry_type = CTIO_TYPE7;
3266                         ctio->dseg_count = 0;
3267                         ctio->u.status1.flags &= ~cpu_to_le16(
3268                             CTIO7_FLAGS_DATA_IN);
3269
3270                         /* Real finish is ctio_m1's finish */
3271                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3272                         pkt->u.status0.flags |= cpu_to_le16(
3273                             CTIO7_FLAGS_DONT_RET_CTIO);
3274
3275                         /* qlt_24xx_init_ctio_to_isp will correct
3276                          * all neccessary fields that's part of CTIO7.
3277                          * There should be no residual of CTIO-CRC2 data.
3278                          */
3279                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3280                             &prm);
3281                 }
3282         } else
3283                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3284
3285
3286         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3287         cmd->cmd_sent_to_fw = 1;
3288
3289         /* Memory Barrier */
3290         wmb();
3291         if (qpair->reqq_start_iocbs)
3292                 qpair->reqq_start_iocbs(qpair);
3293         else
3294                 qla2x00_start_iocbs(vha, qpair->req);
3295         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3296
3297         return 0;
3298
3299 out_unmap_unlock:
3300         qlt_unmap_sg(vha, cmd);
3301         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3302
3303         return res;
3304 }
3305 EXPORT_SYMBOL(qlt_xmit_response);
3306
3307 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3308 {
3309         struct ctio7_to_24xx *pkt;
3310         struct scsi_qla_host *vha = cmd->vha;
3311         struct qla_tgt *tgt = cmd->tgt;
3312         struct qla_tgt_prm prm;
3313         unsigned long flags = 0;
3314         int res = 0;
3315         struct qla_qpair *qpair = cmd->qpair;
3316
3317         memset(&prm, 0, sizeof(prm));
3318         prm.cmd = cmd;
3319         prm.tgt = tgt;
3320         prm.sg = NULL;
3321         prm.req_cnt = 1;
3322
3323         /* Calculate number of entries and segments required */
3324         if (qlt_pci_map_calc_cnt(&prm) != 0)
3325                 return -EAGAIN;
3326
3327         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3328             (cmd->sess && cmd->sess->deleted)) {
3329                 /*
3330                  * Either the port is not online or this request was from
3331                  * previous life, just abort the processing.
3332                  */
3333                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3334                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3335                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3336                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3337                         vha->flags.online, qla2x00_reset_active(vha),
3338                         cmd->reset_count, qpair->chip_reset);
3339                 return 0;
3340         }
3341
3342         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3343         /* Does F/W have an IOCBs for this request */
3344         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3345         if (res != 0)
3346                 goto out_unlock_free_unmap;
3347         if (cmd->se_cmd.prot_op)
3348                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3349         else
3350                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3351
3352         if (unlikely(res != 0)) {
3353                 qpair->req->cnt += prm.req_cnt;
3354                 goto out_unlock_free_unmap;
3355         }
3356
3357         pkt = (struct ctio7_to_24xx *)prm.pkt;
3358         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3359             CTIO7_FLAGS_STATUS_MODE_0);
3360
3361         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3362                 qlt_load_data_segments(&prm);
3363
3364         cmd->state = QLA_TGT_STATE_NEED_DATA;
3365         cmd->cmd_sent_to_fw = 1;
3366
3367         /* Memory Barrier */
3368         wmb();
3369         if (qpair->reqq_start_iocbs)
3370                 qpair->reqq_start_iocbs(qpair);
3371         else
3372                 qla2x00_start_iocbs(vha, qpair->req);
3373         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3374
3375         return res;
3376
3377 out_unlock_free_unmap:
3378         qlt_unmap_sg(vha, cmd);
3379         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3380
3381         return res;
3382 }
3383 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3384
3385
3386 /*
3387  * it is assumed either hardware_lock or qpair lock is held.
3388  */
3389 static void
3390 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3391         struct ctio_crc_from_fw *sts)
3392 {
3393         uint8_t         *ap = &sts->actual_dif[0];
3394         uint8_t         *ep = &sts->expected_dif[0];
3395         uint64_t        lba = cmd->se_cmd.t_task_lba;
3396         uint8_t scsi_status, sense_key, asc, ascq;
3397         unsigned long flags;
3398         struct scsi_qla_host *vha = cmd->vha;
3399
3400         cmd->trc_flags |= TRC_DIF_ERR;
3401
3402         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3403         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3404         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3405
3406         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3407         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3408         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3409
3410         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3411             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3412
3413         scsi_status = sense_key = asc = ascq = 0;
3414
3415         /* check appl tag */
3416         if (cmd->e_app_tag != cmd->a_app_tag) {
3417                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3418                     "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]",
3419                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3420                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3421                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3422                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3423
3424                 cmd->dif_err_code = DIF_ERR_APP;
3425                 scsi_status = SAM_STAT_CHECK_CONDITION;
3426                 sense_key = ABORTED_COMMAND;
3427                 asc = 0x10;
3428                 ascq = 0x2;
3429         }
3430
3431         /* check ref tag */
3432         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3433                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3434                     "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] ",
3435                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3436                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3437                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3438                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3439
3440                 cmd->dif_err_code = DIF_ERR_REF;
3441                 scsi_status = SAM_STAT_CHECK_CONDITION;
3442                 sense_key = ABORTED_COMMAND;
3443                 asc = 0x10;
3444                 ascq = 0x3;
3445                 goto out;
3446         }
3447
3448         /* check guard */
3449         if (cmd->e_guard != cmd->a_guard) {
3450                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3451                     "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]",
3452                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3453                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3454                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3455                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3456
3457                 cmd->dif_err_code = DIF_ERR_GRD;
3458                 scsi_status = SAM_STAT_CHECK_CONDITION;
3459                 sense_key = ABORTED_COMMAND;
3460                 asc = 0x10;
3461                 ascq = 0x1;
3462         }
3463 out:
3464         switch (cmd->state) {
3465         case QLA_TGT_STATE_NEED_DATA:
3466                 /* handle_data will load DIF error code  */
3467                 cmd->state = QLA_TGT_STATE_DATA_IN;
3468                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3469                 break;
3470         default:
3471                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3472                 if (cmd->aborted) {
3473                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3474                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3475                         break;
3476                 }
3477                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3478
3479                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3480                     ascq);
3481                 /* assume scsi status gets out on the wire.
3482                  * Will not wait for completion.
3483                  */
3484                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3485                 break;
3486         }
3487 }
3488
3489 /* If hardware_lock held on entry, might drop it, then reaquire */
3490 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3491 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3492         struct imm_ntfy_from_isp *ntfy)
3493 {
3494         struct nack_to_isp *nack;
3495         struct qla_hw_data *ha = vha->hw;
3496         request_t *pkt;
3497         int ret = 0;
3498
3499         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3500             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3501
3502         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3503         if (pkt == NULL) {
3504                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3505                     "qla_target(%d): %s failed: unable to allocate "
3506                     "request packet\n", vha->vp_idx, __func__);
3507                 return -ENOMEM;
3508         }
3509
3510         pkt->entry_type = NOTIFY_ACK_TYPE;
3511         pkt->entry_count = 1;
3512         pkt->handle = QLA_TGT_SKIP_HANDLE;
3513
3514         nack = (struct nack_to_isp *)pkt;
3515         nack->ox_id = ntfy->ox_id;
3516
3517         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3518         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3519                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3520                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3521         }
3522
3523         /* terminate */
3524         nack->u.isp24.flags |=
3525                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3526
3527         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3528         nack->u.isp24.status = ntfy->u.isp24.status;
3529         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3530         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3531         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3532         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3533         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3534         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3535
3536         qla2x00_start_iocbs(vha, vha->req);
3537         return ret;
3538 }
3539
3540 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3541         struct imm_ntfy_from_isp *imm, int ha_locked)
3542 {
3543         unsigned long flags = 0;
3544         int rc;
3545
3546         if (ha_locked) {
3547                 rc = __qlt_send_term_imm_notif(vha, imm);
3548
3549 #if 0   /* Todo  */
3550                 if (rc == -ENOMEM)
3551                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3552 #else
3553                 if (rc) {
3554                 }
3555 #endif
3556                 goto done;
3557         }
3558
3559         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3560         rc = __qlt_send_term_imm_notif(vha, imm);
3561
3562 #if 0   /* Todo */
3563         if (rc == -ENOMEM)
3564                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3565 #endif
3566
3567 done:
3568         if (!ha_locked)
3569                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3570 }
3571
3572 /*
3573  * If hardware_lock held on entry, might drop it, then reaquire
3574  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3575  */
3576 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3577         struct qla_tgt_cmd *cmd,
3578         struct atio_from_isp *atio)
3579 {
3580         struct scsi_qla_host *vha = qpair->vha;
3581         struct ctio7_to_24xx *ctio24;
3582         struct qla_hw_data *ha = vha->hw;
3583         request_t *pkt;
3584         int ret = 0;
3585         uint16_t temp;
3586
3587         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3588
3589         if (cmd)
3590                 vha = cmd->vha;
3591
3592         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3593         if (pkt == NULL) {
3594                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3595                     "qla_target(%d): %s failed: unable to allocate "
3596                     "request packet\n", vha->vp_idx, __func__);
3597                 return -ENOMEM;
3598         }
3599
3600         if (cmd != NULL) {
3601                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3602                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3603                             "qla_target(%d): Terminating cmd %p with "
3604                             "incorrect state %d\n", vha->vp_idx, cmd,
3605                             cmd->state);
3606                 } else
3607                         ret = 1;
3608         }
3609
3610         qpair->tgt_counters.num_term_xchg_sent++;
3611         pkt->entry_count = 1;
3612         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3613
3614         ctio24 = (struct ctio7_to_24xx *)pkt;
3615         ctio24->entry_type = CTIO_TYPE7;
3616         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3617         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3618         ctio24->vp_index = vha->vp_idx;
3619         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3620         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3621         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3622         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3623         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3624                 CTIO7_FLAGS_TERMINATE;
3625         ctio24->u.status1.flags = cpu_to_le16(temp);
3626         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3627         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3628
3629         /* Memory Barrier */
3630         wmb();
3631         if (qpair->reqq_start_iocbs)
3632                 qpair->reqq_start_iocbs(qpair);
3633         else
3634                 qla2x00_start_iocbs(vha, qpair->req);
3635         return ret;
3636 }
3637
3638 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3639         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3640         int ul_abort)
3641 {
3642         struct scsi_qla_host *vha;
3643         unsigned long flags = 0;
3644         int rc;
3645
3646         /* why use different vha? NPIV */
3647         if (cmd)
3648                 vha = cmd->vha;
3649         else
3650                 vha = qpair->vha;
3651
3652         if (ha_locked) {
3653                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3654                 if (rc == -ENOMEM)
3655                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3656                 goto done;
3657         }
3658         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3659         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3660         if (rc == -ENOMEM)
3661                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3662
3663 done:
3664         if (cmd && !ul_abort && !cmd->aborted) {
3665                 if (cmd->sg_mapped)
3666                         qlt_unmap_sg(vha, cmd);
3667                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3668         }
3669
3670         if (!ha_locked)
3671                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3672
3673         return;
3674 }
3675
3676 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3677 {
3678         struct list_head free_list;
3679         struct qla_tgt_cmd *cmd, *tcmd;
3680
3681         vha->hw->tgt.leak_exchg_thresh_hold =
3682             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3683
3684         cmd = tcmd = NULL;
3685         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3686                 INIT_LIST_HEAD(&free_list);
3687                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3688
3689                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3690                         list_del(&cmd->cmd_list);
3691                         /* This cmd was never sent to TCM.  There is no need
3692                          * to schedule free or call free_cmd
3693                          */
3694                         qlt_free_cmd(cmd);
3695                         vha->hw->tgt.num_qfull_cmds_alloc--;
3696                 }
3697         }
3698         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3699 }
3700
3701 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3702 {
3703         uint32_t total_leaked;
3704
3705         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3706
3707         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3708             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3709
3710                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3711                     "Chip reset due to exchange starvation: %d/%d.\n",
3712                     total_leaked, vha->hw->cur_fw_xcb_count);
3713
3714                 if (IS_P3P_TYPE(vha->hw))
3715                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3716                 else
3717                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3718                 qla2xxx_wake_dpc(vha);
3719         }
3720
3721 }
3722
3723 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3724 {
3725         struct qla_tgt *tgt = cmd->tgt;
3726         struct scsi_qla_host *vha = tgt->vha;
3727         struct se_cmd *se_cmd = &cmd->se_cmd;
3728         unsigned long flags;
3729
3730         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3731             "qla_target(%d): terminating exchange for aborted cmd=%p "
3732             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3733             se_cmd->tag);
3734
3735         spin_lock_irqsave(&cmd->cmd_lock, flags);
3736         if (cmd->aborted) {
3737                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3738                 /*
3739                  * It's normal to see 2 calls in this path:
3740                  *  1) XFER Rdy completion + CMD_T_ABORT
3741                  *  2) TCM TMR - drain_state_list
3742                  */
3743                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3744                     "multiple abort. %p transport_state %x, t_state %x, "
3745                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3746                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3747                 return EIO;
3748         }
3749         cmd->aborted = 1;
3750         cmd->trc_flags |= TRC_ABORT;
3751         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3752
3753         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3754         return 0;
3755 }
3756 EXPORT_SYMBOL(qlt_abort_cmd);
3757
3758 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3759 {
3760         struct fc_port *sess = cmd->sess;
3761
3762         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3763             "%s: se_cmd[%p] ox_id %04x\n",
3764             __func__, &cmd->se_cmd,
3765             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3766
3767         BUG_ON(cmd->cmd_in_wq);
3768
3769         if (cmd->sg_mapped)
3770                 qlt_unmap_sg(cmd->vha, cmd);
3771
3772         if (!cmd->q_full)
3773                 qlt_decr_num_pend_cmds(cmd->vha);
3774
3775         BUG_ON(cmd->sg_mapped);
3776         cmd->jiffies_at_free = get_jiffies_64();
3777         if (unlikely(cmd->free_sg))
3778                 kfree(cmd->sg);
3779
3780         if (!sess || !sess->se_sess) {
3781                 WARN_ON(1);
3782                 return;
3783         }
3784         cmd->jiffies_at_free = get_jiffies_64();
3785         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3786 }
3787 EXPORT_SYMBOL(qlt_free_cmd);
3788
3789 /*
3790  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3791  */
3792 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3793         struct qla_tgt_cmd *cmd, uint32_t status)
3794 {
3795         int term = 0;
3796         struct scsi_qla_host *vha = qpair->vha;
3797
3798         if (cmd->se_cmd.prot_op)
3799                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3800                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3801                     "se_cmd=%p tag[%x] op %#x/%s",
3802                      cmd->lba, cmd->lba,
3803                      cmd->num_blks, &cmd->se_cmd,
3804                      cmd->atio.u.isp24.exchange_addr,
3805                      cmd->se_cmd.prot_op,
3806                      prot_op_str(cmd->se_cmd.prot_op));
3807
3808         if (ctio != NULL) {
3809                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3810                 term = !(c->flags &
3811                     cpu_to_le16(OF_TERM_EXCH));
3812         } else
3813                 term = 1;
3814
3815         if (term)
3816                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3817
3818         return term;
3819 }
3820
3821
3822 /* ha->hardware_lock supposed to be held on entry */
3823 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3824         struct rsp_que *rsp, uint32_t handle, void *ctio)
3825 {
3826         struct qla_tgt_cmd *cmd = NULL;
3827         struct req_que *req;
3828         int qid = GET_QID(handle);
3829         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3830
3831         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3832                 return NULL;
3833
3834         if (qid == rsp->req->id) {
3835                 req = rsp->req;
3836         } else if (vha->hw->req_q_map[qid]) {
3837                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3838                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3839                     vha->vp_idx, rsp->id, handle);
3840                 req = vha->hw->req_q_map[qid];
3841         } else {
3842                 return NULL;
3843         }
3844
3845         h &= QLA_CMD_HANDLE_MASK;
3846
3847         if (h != QLA_TGT_NULL_HANDLE) {
3848                 if (unlikely(h >= req->num_outstanding_cmds)) {
3849                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3850                             "qla_target(%d): Wrong handle %x received\n",
3851                             vha->vp_idx, handle);
3852                         return NULL;
3853                 }
3854
3855                 cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h];
3856                 if (unlikely(cmd == NULL)) {
3857                         ql_dbg(ql_dbg_async, vha, 0xe053,
3858                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3859                                 vha->vp_idx, handle, req->id, rsp->id);
3860                         return NULL;
3861                 }
3862                 req->outstanding_cmds[h] = NULL;
3863         } else if (ctio != NULL) {
3864                 /* We can't get loop ID from CTIO7 */
3865                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3866                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3867                     "support NULL handles\n", vha->vp_idx);
3868                 return NULL;
3869         }
3870
3871         return cmd;
3872 }
3873
3874 /* hardware_lock should be held by caller. */
3875 void
3876 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3877 {
3878         struct qla_hw_data *ha = vha->hw;
3879
3880         if (cmd->sg_mapped)
3881                 qlt_unmap_sg(vha, cmd);
3882
3883         /* TODO: fix debug message type and ids. */
3884         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3885                 ql_dbg(ql_dbg_io, vha, 0xff00,
3886                     "HOST-ABORT: state=PROCESSED.\n");
3887         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3888                 cmd->write_data_transferred = 0;
3889                 cmd->state = QLA_TGT_STATE_DATA_IN;
3890
3891                 ql_dbg(ql_dbg_io, vha, 0xff01,
3892                     "HOST-ABORT: state=DATA_IN.\n");
3893
3894                 ha->tgt.tgt_ops->handle_data(cmd);
3895                 return;
3896         } else {
3897                 ql_dbg(ql_dbg_io, vha, 0xff03,
3898                     "HOST-ABORT: state=BAD(%d).\n",
3899                     cmd->state);
3900                 dump_stack();
3901         }
3902
3903         cmd->trc_flags |= TRC_FLUSH;
3904         ha->tgt.tgt_ops->free_cmd(cmd);
3905 }
3906
3907 /*
3908  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3909  */
3910 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3911     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3912 {
3913         struct qla_hw_data *ha = vha->hw;
3914         struct se_cmd *se_cmd;
3915         struct qla_tgt_cmd *cmd;
3916         struct qla_qpair *qpair = rsp->qpair;
3917
3918         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3919                 /* That could happen only in case of an error/reset/abort */
3920                 if (status != CTIO_SUCCESS) {
3921                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3922                             "Intermediate CTIO received"
3923                             " (status %x)\n", status);
3924                 }
3925                 return;
3926         }
3927
3928         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3929         if (cmd == NULL)
3930                 return;
3931
3932         se_cmd = &cmd->se_cmd;
3933         cmd->cmd_sent_to_fw = 0;
3934
3935         qlt_unmap_sg(vha, cmd);
3936
3937         if (unlikely(status != CTIO_SUCCESS)) {
3938                 switch (status & 0xFFFF) {
3939                 case CTIO_LIP_RESET:
3940                 case CTIO_TARGET_RESET:
3941                 case CTIO_ABORTED:
3942                         /* driver request abort via Terminate exchange */
3943                 case CTIO_TIMEOUT:
3944                 case CTIO_INVALID_RX_ID:
3945                         /* They are OK */
3946                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3947                             "qla_target(%d): CTIO with "
3948                             "status %#x received, state %x, se_cmd %p, "
3949                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3950                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3951                             status, cmd->state, se_cmd);
3952                         break;
3953
3954                 case CTIO_PORT_LOGGED_OUT:
3955                 case CTIO_PORT_UNAVAILABLE:
3956                 {
3957                         int logged_out =
3958                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3959
3960                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3961                             "qla_target(%d): CTIO with %s status %x "
3962                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3963                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3964                             status, cmd->state, se_cmd);
3965
3966                         if (logged_out && cmd->sess) {
3967                                 /*
3968                                  * Session is already logged out, but we need
3969                                  * to notify initiator, who's not aware of this
3970                                  */
3971                                 cmd->sess->logout_on_delete = 0;
3972                                 cmd->sess->send_els_logo = 1;
3973                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3974                                     "%s %d %8phC post del sess\n",
3975                                     __func__, __LINE__, cmd->sess->port_name);
3976
3977                                 qlt_schedule_sess_for_deletion(cmd->sess);
3978                         }
3979                         break;
3980                 }
3981                 case CTIO_DIF_ERROR: {
3982                         struct ctio_crc_from_fw *crc =
3983                                 (struct ctio_crc_from_fw *)ctio;
3984                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3985                             "qla_target(%d): CTIO with DIF_ERROR status %x "
3986                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3987                             "expect_dif[0x%llx]\n",
3988                             vha->vp_idx, status, cmd->state, se_cmd,
3989                             *((u64 *)&crc->actual_dif[0]),
3990                             *((u64 *)&crc->expected_dif[0]));
3991
3992                         qlt_handle_dif_error(qpair, cmd, ctio);
3993                         return;
3994                 }
3995                 default:
3996                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3997                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3998                             vha->vp_idx, status, cmd->state, se_cmd);
3999                         break;
4000                 }
4001
4002
4003                 /* "cmd->aborted" means
4004                  * cmd is already aborted/terminated, we don't
4005                  * need to terminate again.  The exchange is already
4006                  * cleaned up/freed at FW level.  Just cleanup at driver
4007                  * level.
4008                  */
4009                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4010                     (!cmd->aborted)) {
4011                         cmd->trc_flags |= TRC_CTIO_ERR;
4012                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4013                                 return;
4014                 }
4015         }
4016
4017         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4018                 cmd->trc_flags |= TRC_CTIO_DONE;
4019         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4020                 cmd->state = QLA_TGT_STATE_DATA_IN;
4021
4022                 if (status == CTIO_SUCCESS)
4023                         cmd->write_data_transferred = 1;
4024
4025                 ha->tgt.tgt_ops->handle_data(cmd);
4026                 return;
4027         } else if (cmd->aborted) {
4028                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4029                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4030                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4031         } else {
4032                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4033                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4034                     "qla_target(%d): A command in state (%d) should "
4035                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4036         }
4037
4038         if (unlikely(status != CTIO_SUCCESS) &&
4039                 !cmd->aborted) {
4040                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4041                 dump_stack();
4042         }
4043
4044         ha->tgt.tgt_ops->free_cmd(cmd);
4045 }
4046
4047 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4048         uint8_t task_codes)
4049 {
4050         int fcp_task_attr;
4051
4052         switch (task_codes) {
4053         case ATIO_SIMPLE_QUEUE:
4054                 fcp_task_attr = TCM_SIMPLE_TAG;
4055                 break;
4056         case ATIO_HEAD_OF_QUEUE:
4057                 fcp_task_attr = TCM_HEAD_TAG;
4058                 break;
4059         case ATIO_ORDERED_QUEUE:
4060                 fcp_task_attr = TCM_ORDERED_TAG;
4061                 break;
4062         case ATIO_ACA_QUEUE:
4063                 fcp_task_attr = TCM_ACA_TAG;
4064                 break;
4065         case ATIO_UNTAGGED:
4066                 fcp_task_attr = TCM_SIMPLE_TAG;
4067                 break;
4068         default:
4069                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4070                     "qla_target: unknown task code %x, use ORDERED instead\n",
4071                     task_codes);
4072                 fcp_task_attr = TCM_ORDERED_TAG;
4073                 break;
4074         }
4075
4076         return fcp_task_attr;
4077 }
4078
4079 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
4080                                         uint8_t *);
4081 /*
4082  * Process context for I/O path into tcm_qla2xxx code
4083  */
4084 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4085 {
4086         scsi_qla_host_t *vha = cmd->vha;
4087         struct qla_hw_data *ha = vha->hw;
4088         struct fc_port *sess = cmd->sess;
4089         struct atio_from_isp *atio = &cmd->atio;
4090         unsigned char *cdb;
4091         unsigned long flags;
4092         uint32_t data_length;
4093         int ret, fcp_task_attr, data_dir, bidi = 0;
4094         struct qla_qpair *qpair = cmd->qpair;
4095
4096         cmd->cmd_in_wq = 0;
4097         cmd->trc_flags |= TRC_DO_WORK;
4098
4099         if (cmd->aborted) {
4100                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4101                     "cmd with tag %u is aborted\n",
4102                     cmd->atio.u.isp24.exchange_addr);
4103                 goto out_term;
4104         }
4105
4106         spin_lock_init(&cmd->cmd_lock);
4107         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4108         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4109
4110         if (atio->u.isp24.fcp_cmnd.rddata &&
4111             atio->u.isp24.fcp_cmnd.wrdata) {
4112                 bidi = 1;
4113                 data_dir = DMA_TO_DEVICE;
4114         } else if (atio->u.isp24.fcp_cmnd.rddata)
4115                 data_dir = DMA_FROM_DEVICE;
4116         else if (atio->u.isp24.fcp_cmnd.wrdata)
4117                 data_dir = DMA_TO_DEVICE;
4118         else
4119                 data_dir = DMA_NONE;
4120
4121         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4122             atio->u.isp24.fcp_cmnd.task_attr);
4123         data_length = get_datalen_for_atio(atio);
4124
4125         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4126                                           fcp_task_attr, data_dir, bidi);
4127         if (ret != 0)
4128                 goto out_term;
4129         /*
4130          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4131          */
4132         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4133         ha->tgt.tgt_ops->put_sess(sess);
4134         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4135         return;
4136
4137 out_term:
4138         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4139         /*
4140          * cmd has not sent to target yet, so pass NULL as the second
4141          * argument to qlt_send_term_exchange() and free the memory here.
4142          */
4143         cmd->trc_flags |= TRC_DO_WORK_ERR;
4144         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4145         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4146
4147         qlt_decr_num_pend_cmds(vha);
4148         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
4149         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4150
4151         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4152         ha->tgt.tgt_ops->put_sess(sess);
4153         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4154 }
4155
4156 static void qlt_do_work(struct work_struct *work)
4157 {
4158         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4159         scsi_qla_host_t *vha = cmd->vha;
4160         unsigned long flags;
4161
4162         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4163         list_del(&cmd->cmd_list);
4164         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4165
4166         __qlt_do_work(cmd);
4167 }
4168
4169 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4170 {
4171         unsigned long flags;
4172         struct qla_hw_data *ha = vha->hw;
4173         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4174         void *node;
4175         u64 key = 0;
4176
4177         ql_log(ql_log_info, vha, 0x706c,
4178             "User update Number of Active Qpairs %d\n",
4179             ha->tgt.num_act_qpairs);
4180
4181         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4182
4183         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4184                 btree_remove64(&tgt->lun_qpair_map, key);
4185
4186         ha->base_qpair->lun_cnt = 0;
4187         for (key = 0; key < ha->max_qpairs; key++)
4188                 if (ha->queue_pair_map[key])
4189                         ha->queue_pair_map[key]->lun_cnt = 0;
4190
4191         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4192 }
4193
4194 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4195         struct qla_tgt_cmd *cmd)
4196 {
4197         struct qla_qpair *qpair, *qp;
4198         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4199         struct qla_qpair_hint *h;
4200
4201         if (vha->flags.qpairs_available) {
4202                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4203                 if (unlikely(!h)) {
4204                         /* spread lun to qpair ratio evently */
4205                         int lcnt = 0, rc;
4206                         struct scsi_qla_host *base_vha =
4207                                 pci_get_drvdata(vha->hw->pdev);
4208
4209                         qpair = vha->hw->base_qpair;
4210                         if (qpair->lun_cnt == 0) {
4211                                 qpair->lun_cnt++;
4212                                 h = qla_qpair_to_hint(tgt, qpair);
4213                                 BUG_ON(!h);
4214                                 rc = btree_insert64(&tgt->lun_qpair_map,
4215                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4216                                 if (rc) {
4217                                         qpair->lun_cnt--;
4218                                         ql_log(ql_log_info, vha, 0xd037,
4219                                             "Unable to insert lun %llx into lun_qpair_map\n",
4220                                             cmd->unpacked_lun);
4221                                 }
4222                                 goto out;
4223                         } else {
4224                                 lcnt = qpair->lun_cnt;
4225                         }
4226
4227                         h = NULL;
4228                         list_for_each_entry(qp, &base_vha->qp_list,
4229                             qp_list_elem) {
4230                                 if (qp->lun_cnt == 0) {
4231                                         qp->lun_cnt++;
4232                                         h = qla_qpair_to_hint(tgt, qp);
4233                                         BUG_ON(!h);
4234                                         rc = btree_insert64(&tgt->lun_qpair_map,
4235                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4236                                         if (rc) {
4237                                                 qp->lun_cnt--;
4238                                                 ql_log(ql_log_info, vha, 0xd038,
4239                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4240                                                         cmd->unpacked_lun);
4241                                         }
4242                                         qpair = qp;
4243                                         goto out;
4244                                 } else {
4245                                         if (qp->lun_cnt < lcnt) {
4246                                                 lcnt = qp->lun_cnt;
4247                                                 qpair = qp;
4248                                                 continue;
4249                                         }
4250                                 }
4251                         }
4252                         BUG_ON(!qpair);
4253                         qpair->lun_cnt++;
4254                         h = qla_qpair_to_hint(tgt, qpair);
4255                         BUG_ON(!h);
4256                         rc = btree_insert64(&tgt->lun_qpair_map,
4257                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4258                         if (rc) {
4259                                 qpair->lun_cnt--;
4260                                 ql_log(ql_log_info, vha, 0xd039,
4261                                    "Unable to insert lun %llx into lun_qpair_map\n",
4262                                    cmd->unpacked_lun);
4263                         }
4264                 }
4265         } else {
4266                 h = &tgt->qphints[0];
4267         }
4268 out:
4269         cmd->qpair = h->qpair;
4270         cmd->se_cmd.cpuid = h->cpuid;
4271 }
4272
4273 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4274                                        struct fc_port *sess,
4275                                        struct atio_from_isp *atio)
4276 {
4277         struct se_session *se_sess = sess->se_sess;
4278         struct qla_tgt_cmd *cmd;
4279         int tag;
4280
4281         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4282         if (tag < 0)
4283                 return NULL;
4284
4285         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4286         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4287         cmd->cmd_type = TYPE_TGT_CMD;
4288         memcpy(&cmd->atio, atio, sizeof(*atio));
4289         cmd->state = QLA_TGT_STATE_NEW;
4290         cmd->tgt = vha->vha_tgt.qla_tgt;
4291         qlt_incr_num_pend_cmds(vha);
4292         cmd->vha = vha;
4293         cmd->se_cmd.map_tag = tag;
4294         cmd->sess = sess;
4295         cmd->loop_id = sess->loop_id;
4296         cmd->conf_compl_supported = sess->conf_compl_supported;
4297
4298         cmd->trc_flags = 0;
4299         cmd->jiffies_at_alloc = get_jiffies_64();
4300
4301         cmd->unpacked_lun = scsilun_to_int(
4302             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4303         qlt_assign_qpair(vha, cmd);
4304         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4305         cmd->vp_idx = vha->vp_idx;
4306
4307         return cmd;
4308 }
4309
4310 /* ha->hardware_lock supposed to be held on entry */
4311 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4312         struct atio_from_isp *atio)
4313 {
4314         struct qla_hw_data *ha = vha->hw;
4315         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4316         struct fc_port *sess;
4317         struct qla_tgt_cmd *cmd;
4318         unsigned long flags;
4319         port_id_t id;
4320
4321         if (unlikely(tgt->tgt_stop)) {
4322                 ql_dbg(ql_dbg_io, vha, 0x3061,
4323                     "New command while device %p is shutting down\n", tgt);
4324                 return -ENODEV;
4325         }
4326
4327         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
4328         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
4329         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
4330         if (IS_SW_RESV_ADDR(id))
4331                 return -EBUSY;
4332
4333         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4334         if (unlikely(!sess))
4335                 return -EFAULT;
4336
4337         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4338          * session deletion, but it's still in sess_del_work wq */
4339         if (sess->deleted) {
4340                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4341                     "New command while old session %p is being deleted\n",
4342                     sess);
4343                 return -EFAULT;
4344         }
4345
4346         /*
4347          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4348          */
4349         if (!kref_get_unless_zero(&sess->sess_kref)) {
4350                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4351                     "%s: kref_get fail, %8phC oxid %x \n",
4352                     __func__, sess->port_name,
4353                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4354                 return -EFAULT;
4355         }
4356
4357         cmd = qlt_get_tag(vha, sess, atio);
4358         if (!cmd) {
4359                 ql_dbg(ql_dbg_io, vha, 0x3062,
4360                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4361                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4362                 ha->tgt.tgt_ops->put_sess(sess);
4363                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4364                 return -EBUSY;
4365         }
4366
4367         cmd->cmd_in_wq = 1;
4368         cmd->trc_flags |= TRC_NEW_CMD;
4369
4370         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4371         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4372         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4373
4374         INIT_WORK(&cmd->work, qlt_do_work);
4375         if (vha->flags.qpairs_available) {
4376                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4377         } else if (ha->msix_count) {
4378                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4379                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4380                             &cmd->work);
4381                 else
4382                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4383                             &cmd->work);
4384         } else {
4385                 queue_work(qla_tgt_wq, &cmd->work);
4386         }
4387
4388         return 0;
4389 }
4390
4391 /* ha->hardware_lock supposed to be held on entry */
4392 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4393         int fn, void *iocb, int flags)
4394 {
4395         struct scsi_qla_host *vha = sess->vha;
4396         struct qla_hw_data *ha = vha->hw;
4397         struct qla_tgt_mgmt_cmd *mcmd;
4398         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4399         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4400
4401         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4402         if (!mcmd) {
4403                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4404                     "qla_target(%d): Allocation of management "
4405                     "command failed, some commands and their data could "
4406                     "leak\n", vha->vp_idx);
4407                 return -ENOMEM;
4408         }
4409         memset(mcmd, 0, sizeof(*mcmd));
4410         mcmd->sess = sess;
4411
4412         if (iocb) {
4413                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4414                     sizeof(mcmd->orig_iocb.imm_ntfy));
4415         }
4416         mcmd->tmr_func = fn;
4417         mcmd->flags = flags;
4418         mcmd->reset_count = ha->base_qpair->chip_reset;
4419         mcmd->qpair = h->qpair;
4420         mcmd->vha = vha;
4421         mcmd->se_cmd.cpuid = h->cpuid;
4422         mcmd->unpacked_lun = lun;
4423
4424         switch (fn) {
4425         case QLA_TGT_LUN_RESET:
4426         case QLA_TGT_CLEAR_TS:
4427         case QLA_TGT_ABORT_TS:
4428                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4429                 /* drop through */
4430         case QLA_TGT_CLEAR_ACA:
4431                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4432                 mcmd->qpair = h->qpair;
4433                 mcmd->se_cmd.cpuid = h->cpuid;
4434                 break;
4435
4436         case QLA_TGT_TARGET_RESET:
4437         case QLA_TGT_NEXUS_LOSS_SESS:
4438         case QLA_TGT_NEXUS_LOSS:
4439         case QLA_TGT_ABORT_ALL:
4440         default:
4441                 /* no-op */
4442                 break;
4443         }
4444
4445         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4446         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4447             &mcmd->work);
4448
4449         return 0;
4450 }
4451
4452 /* ha->hardware_lock supposed to be held on entry */
4453 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4454 {
4455         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4456         struct qla_hw_data *ha = vha->hw;
4457         struct fc_port *sess;
4458         u64 unpacked_lun;
4459         int fn;
4460         unsigned long flags;
4461
4462         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4463
4464         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4465         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4466             a->u.isp24.fcp_hdr.s_id);
4467         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4468
4469         unpacked_lun =
4470             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4471
4472         if (sess == NULL || sess->deleted)
4473                 return -EFAULT;
4474
4475         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4476 }
4477
4478 /* ha->hardware_lock supposed to be held on entry */
4479 static int __qlt_abort_task(struct scsi_qla_host *vha,
4480         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4481 {
4482         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4483         struct qla_hw_data *ha = vha->hw;
4484         struct qla_tgt_mgmt_cmd *mcmd;
4485         u64 unpacked_lun;
4486         int rc;
4487
4488         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4489         if (mcmd == NULL) {
4490                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4491                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4492                     vha->vp_idx, __func__);
4493                 return -ENOMEM;
4494         }
4495         memset(mcmd, 0, sizeof(*mcmd));
4496
4497         mcmd->sess = sess;
4498         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4499             sizeof(mcmd->orig_iocb.imm_ntfy));
4500
4501         unpacked_lun =
4502             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4503         mcmd->reset_count = ha->base_qpair->chip_reset;
4504         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4505         mcmd->qpair = ha->base_qpair;
4506
4507         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4508             le16_to_cpu(iocb->u.isp2x.seq_id));
4509         if (rc != 0) {
4510                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4511                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4512                     vha->vp_idx, rc);
4513                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4514                 return -EFAULT;
4515         }
4516
4517         return 0;
4518 }
4519
4520 /* ha->hardware_lock supposed to be held on entry */
4521 static int qlt_abort_task(struct scsi_qla_host *vha,
4522         struct imm_ntfy_from_isp *iocb)
4523 {
4524         struct qla_hw_data *ha = vha->hw;
4525         struct fc_port *sess;
4526         int loop_id;
4527         unsigned long flags;
4528
4529         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4530
4531         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4532         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4533         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4534
4535         if (sess == NULL) {
4536                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4537                     "qla_target(%d): task abort for unexisting "
4538                     "session\n", vha->vp_idx);
4539                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4540                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4541         }
4542
4543         return __qlt_abort_task(vha, iocb, sess);
4544 }
4545
4546 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4547 {
4548         if (rc != MBS_COMMAND_COMPLETE) {
4549                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4550                         "%s: se_sess %p / sess %p from"
4551                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4552                         " LOGO failed: %#x\n",
4553                         __func__,
4554                         fcport->se_sess,
4555                         fcport,
4556                         fcport->port_name, fcport->loop_id,
4557                         fcport->d_id.b.domain, fcport->d_id.b.area,
4558                         fcport->d_id.b.al_pa, rc);
4559         }
4560
4561         fcport->logout_completed = 1;
4562 }
4563
4564 /*
4565 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4566 *
4567 * Schedules sessions with matching port_id/loop_id but different wwn for
4568 * deletion. Returns existing session with matching wwn if present.
4569 * Null otherwise.
4570 */
4571 struct fc_port *
4572 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4573     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4574 {
4575         struct fc_port *sess = NULL, *other_sess;
4576         uint64_t other_wwn;
4577
4578         *conflict_sess = NULL;
4579
4580         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4581
4582                 other_wwn = wwn_to_u64(other_sess->port_name);
4583
4584                 if (wwn == other_wwn) {
4585                         WARN_ON(sess);
4586                         sess = other_sess;
4587                         continue;
4588                 }
4589
4590                 /* find other sess with nport_id collision */
4591                 if (port_id.b24 == other_sess->d_id.b24) {
4592                         if (loop_id != other_sess->loop_id) {
4593                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4594                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4595                                     other_sess, other_sess->loop_id, other_wwn);
4596
4597                                 /*
4598                                  * logout_on_delete is set by default, but another
4599                                  * session that has the same s_id/loop_id combo
4600                                  * might have cleared it when requested this session
4601                                  * deletion, so don't touch it
4602                                  */
4603                                 qlt_schedule_sess_for_deletion(other_sess);
4604                         } else {
4605                                 /*
4606                                  * Another wwn used to have our s_id/loop_id
4607                                  * kill the session, but don't free the loop_id
4608                                  */
4609                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4610                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4611                                     other_sess, other_sess->loop_id, other_wwn);
4612
4613                                 other_sess->keep_nport_handle = 1;
4614                                 if (other_sess->disc_state != DSC_DELETED)
4615                                         *conflict_sess = other_sess;
4616                                 qlt_schedule_sess_for_deletion(other_sess);
4617                         }
4618                         continue;
4619                 }
4620
4621                 /* find other sess with nport handle collision */
4622                 if ((loop_id == other_sess->loop_id) &&
4623                         (loop_id != FC_NO_LOOP_ID)) {
4624                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4625                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4626                                other_sess, other_sess->loop_id, other_wwn);
4627
4628                         /* Same loop_id but different s_id
4629                          * Ok to kill and logout */
4630                         qlt_schedule_sess_for_deletion(other_sess);
4631                 }
4632         }
4633
4634         return sess;
4635 }
4636
4637 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4638 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4639 {
4640         struct qla_tgt_sess_op *op;
4641         struct qla_tgt_cmd *cmd;
4642         uint32_t key;
4643         int count = 0;
4644         unsigned long flags;
4645
4646         key = (((u32)s_id->b.domain << 16) |
4647                ((u32)s_id->b.area   <<  8) |
4648                ((u32)s_id->b.al_pa));
4649
4650         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4651         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4652                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4653
4654                 if (op_key == key) {
4655                         op->aborted = true;
4656                         count++;
4657                 }
4658         }
4659
4660         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4661                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4662                 if (op_key == key) {
4663                         op->aborted = true;
4664                         count++;
4665                 }
4666         }
4667
4668         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4669                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4670                 if (cmd_key == key) {
4671                         cmd->aborted = 1;
4672                         count++;
4673                 }
4674         }
4675         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4676
4677         return count;
4678 }
4679
4680 static int qlt_handle_login(struct scsi_qla_host *vha,
4681     struct imm_ntfy_from_isp *iocb)
4682 {
4683         struct fc_port *sess = NULL, *conflict_sess = NULL;
4684         uint64_t wwn;
4685         port_id_t port_id;
4686         uint16_t loop_id, wd3_lo;
4687         int res = 0;
4688         struct qlt_plogi_ack_t *pla;
4689         unsigned long flags;
4690
4691         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4692
4693         port_id.b.domain = iocb->u.isp24.port_id[2];
4694         port_id.b.area   = iocb->u.isp24.port_id[1];
4695         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4696         port_id.b.rsvd_1 = 0;
4697
4698         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4699
4700         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4701         abort_cmds_for_s_id(vha, &port_id);
4702
4703         if (wwn) {
4704                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4705                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4706                     port_id, loop_id, &conflict_sess);
4707                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4708         }
4709
4710         if (IS_SW_RESV_ADDR(port_id)) {
4711                 res = 1;
4712                 goto out;
4713         }
4714
4715         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4716         if (!pla) {
4717                 qlt_send_term_imm_notif(vha, iocb, 1);
4718                 goto out;
4719         }
4720
4721         if (conflict_sess) {
4722                 conflict_sess->login_gen++;
4723                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4724                     QLT_PLOGI_LINK_CONFLICT);
4725         }
4726
4727         if (!sess) {
4728                 pla->ref_count++;
4729                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4730                     "%s %d %8phC post new sess\n",
4731                     __func__, __LINE__, iocb->u.isp24.port_name);
4732                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4733                         qla24xx_post_newsess_work(vha, &port_id,
4734                             iocb->u.isp24.port_name,
4735                             iocb->u.isp24.u.plogi.node_name,
4736                             pla, FC4_TYPE_UNKNOWN);
4737                 else
4738                         qla24xx_post_newsess_work(vha, &port_id,
4739                             iocb->u.isp24.port_name, NULL,
4740                             pla, FC4_TYPE_UNKNOWN);
4741
4742                 goto out;
4743         }
4744
4745         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4746         sess->d_id = port_id;
4747         sess->login_gen++;
4748
4749         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4750                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4751                 sess->local = 0;
4752                 sess->loop_id = loop_id;
4753                 sess->d_id = port_id;
4754                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4755                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4756
4757                 if (wd3_lo & BIT_7)
4758                         sess->conf_compl_supported = 1;
4759
4760                 if ((wd3_lo & BIT_4) == 0)
4761                         sess->port_type = FCT_INITIATOR;
4762                 else
4763                         sess->port_type = FCT_TARGET;
4764
4765         } else
4766                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4767
4768
4769         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4770             "%s %d %8phC  DS %d\n",
4771             __func__, __LINE__, sess->port_name, sess->disc_state);
4772
4773         switch (sess->disc_state) {
4774         case DSC_DELETED:
4775                 qlt_plogi_ack_unref(vha, pla);
4776                 break;
4777
4778         default:
4779                 /*
4780                  * Under normal circumstances we want to release nport handle
4781                  * during LOGO process to avoid nport handle leaks inside FW.
4782                  * The exception is when LOGO is done while another PLOGI with
4783                  * the same nport handle is waiting as might be the case here.
4784                  * Note: there is always a possibily of a race where session
4785                  * deletion has already started for other reasons (e.g. ACL
4786                  * removal) and now PLOGI arrives:
4787                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4788                  *    FW must have assigned this PLOGI a new/same handle and we
4789                  *    can proceed ACK'ing it as usual when session deletion
4790                  *    completes.
4791                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4792                  *    bit reached it, the handle has now been released. We'll
4793                  *    get an error when we ACK this PLOGI. Nothing will be sent
4794                  *    back to initiator. Initiator should eventually retry
4795                  *    PLOGI and situation will correct itself.
4796                  */
4797                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4798                     (sess->d_id.b24 == port_id.b24));
4799
4800                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4801                     "%s %d %8phC post del sess\n",
4802                     __func__, __LINE__, sess->port_name);
4803
4804
4805                 qlt_schedule_sess_for_deletion(sess);
4806                 break;
4807         }
4808 out:
4809         return res;
4810 }
4811
4812 /*
4813  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4814  */
4815 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4816         struct imm_ntfy_from_isp *iocb)
4817 {
4818         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4819         struct qla_hw_data *ha = vha->hw;
4820         struct fc_port *sess = NULL, *conflict_sess = NULL;
4821         uint64_t wwn;
4822         port_id_t port_id;
4823         uint16_t loop_id;
4824         uint16_t wd3_lo;
4825         int res = 0;
4826         unsigned long flags;
4827
4828         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4829
4830         port_id.b.domain = iocb->u.isp24.port_id[2];
4831         port_id.b.area   = iocb->u.isp24.port_id[1];
4832         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4833         port_id.b.rsvd_1 = 0;
4834
4835         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4836
4837         ql_dbg(ql_dbg_disc, vha, 0xf026,
4838             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4839             vha->vp_idx, iocb->u.isp24.port_id[2],
4840                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4841                    iocb->u.isp24.status_subcode, loop_id,
4842                 iocb->u.isp24.port_name);
4843
4844         /* res = 1 means ack at the end of thread
4845          * res = 0 means ack async/later.
4846          */
4847         switch (iocb->u.isp24.status_subcode) {
4848         case ELS_PLOGI:
4849                 res = qlt_handle_login(vha, iocb);
4850                 break;
4851
4852         case ELS_PRLI:
4853                 if (N2N_TOPO(ha)) {
4854                         sess = qla2x00_find_fcport_by_wwpn(vha,
4855                             iocb->u.isp24.port_name, 1);
4856
4857                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4858                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4859                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4860                                     __func__, __LINE__,
4861                                     iocb->u.isp24.port_name);
4862                                 qlt_send_term_imm_notif(vha, iocb, 1);
4863                                 break;
4864                         }
4865
4866                         res = qlt_handle_login(vha, iocb);
4867                         break;
4868                 }
4869
4870                 if (IS_SW_RESV_ADDR(port_id)) {
4871                         res = 1;
4872                         break;
4873                 }
4874
4875                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4876
4877                 if (wwn) {
4878                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4879                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4880                                 loop_id, &conflict_sess);
4881                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4882                 }
4883
4884                 if (conflict_sess) {
4885                         switch (conflict_sess->disc_state) {
4886                         case DSC_DELETED:
4887                         case DSC_DELETE_PEND:
4888                                 break;
4889                         default:
4890                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4891                                     "PRLI with conflicting sess %p port %8phC\n",
4892                                     conflict_sess, conflict_sess->port_name);
4893                                 conflict_sess->fw_login_state =
4894                                     DSC_LS_PORT_UNAVAIL;
4895                                 qlt_send_term_imm_notif(vha, iocb, 1);
4896                                 res = 0;
4897                                 break;
4898                         }
4899                 }
4900
4901                 if (sess != NULL) {
4902                         bool delete = false;
4903                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4904                         switch (sess->fw_login_state) {
4905                         case DSC_LS_PLOGI_PEND:
4906                         case DSC_LS_PLOGI_COMP:
4907                         case DSC_LS_PRLI_COMP:
4908                                 break;
4909                         default:
4910                                 delete = true;
4911                                 break;
4912                         }
4913
4914                         switch (sess->disc_state) {
4915                         case DSC_LOGIN_PEND:
4916                         case DSC_GPDB:
4917                         case DSC_UPD_FCPORT:
4918                         case DSC_LOGIN_COMPLETE:
4919                         case DSC_ADISC:
4920                                 delete = false;
4921                                 break;
4922                         default:
4923                                 break;
4924                         }
4925
4926                         if (delete) {
4927                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4928                                     flags);
4929                                 /*
4930                                  * Impatient initiator sent PRLI before last
4931                                  * PLOGI could finish. Will force him to re-try,
4932                                  * while last one finishes.
4933                                  */
4934                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4935                                     "sess %p PRLI received, before plogi ack.\n",
4936                                     sess);
4937                                 qlt_send_term_imm_notif(vha, iocb, 1);
4938                                 res = 0;
4939                                 break;
4940                         }
4941
4942                         /*
4943                          * This shouldn't happen under normal circumstances,
4944                          * since we have deleted the old session during PLOGI
4945                          */
4946                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4947                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4948                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4949
4950                         sess->local = 0;
4951                         sess->loop_id = loop_id;
4952                         sess->d_id = port_id;
4953                         sess->fw_login_state = DSC_LS_PRLI_PEND;
4954
4955                         if (wd3_lo & BIT_7)
4956                                 sess->conf_compl_supported = 1;
4957
4958                         if ((wd3_lo & BIT_4) == 0)
4959                                 sess->port_type = FCT_INITIATOR;
4960                         else
4961                                 sess->port_type = FCT_TARGET;
4962
4963                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4964                 }
4965                 res = 1; /* send notify ack */
4966
4967                 /* Make session global (not used in fabric mode) */
4968                 if (ha->current_topology != ISP_CFG_F) {
4969                         if (sess) {
4970                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
4971                                     "%s %d %8phC post nack\n",
4972                                     __func__, __LINE__, sess->port_name);
4973                                 qla24xx_post_nack_work(vha, sess, iocb,
4974                                         SRB_NACK_PRLI);
4975                                 res = 0;
4976                         } else {
4977                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4978                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4979                                 qla2xxx_wake_dpc(vha);
4980                         }
4981                 } else {
4982                         if (sess) {
4983                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
4984                                     "%s %d %8phC post nack\n",
4985                                     __func__, __LINE__, sess->port_name);
4986                                 qla24xx_post_nack_work(vha, sess, iocb,
4987                                         SRB_NACK_PRLI);
4988                                 res = 0;
4989                         }
4990                 }
4991                 break;
4992
4993         case ELS_TPRLO:
4994                 if (le16_to_cpu(iocb->u.isp24.flags) &
4995                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
4996                         loop_id = 0xFFFF;
4997                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
4998                         res = 1;
4999                         break;
5000                 }
5001                 /* fall through */
5002         case ELS_LOGO:
5003         case ELS_PRLO:
5004                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5005                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5006                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5007
5008                 if (sess) {
5009                         sess->login_gen++;
5010                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5011                         sess->logo_ack_needed = 1;
5012                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5013                 }
5014
5015                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5016
5017                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5018                     "%s: logo %llx res %d sess %p ",
5019                     __func__, wwn, res, sess);
5020                 if (res == 0) {
5021                         /*
5022                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5023                          * for LOGO_ACK & sess delete
5024                          */
5025                         BUG_ON(!sess);
5026                         res = 0;
5027                 } else {
5028                         /* cmd did not go to upper layer. */
5029                         if (sess) {
5030                                 qlt_schedule_sess_for_deletion(sess);
5031                                 res = 0;
5032                         }
5033                         /* else logo will be ack */
5034                 }
5035                 break;
5036         case ELS_PDISC:
5037         case ELS_ADISC:
5038         {
5039                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5040                 if (tgt->link_reinit_iocb_pending) {
5041                         qlt_send_notify_ack(ha->base_qpair,
5042                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5043                         tgt->link_reinit_iocb_pending = 0;
5044                 }
5045
5046                 sess = qla2x00_find_fcport_by_wwpn(vha,
5047                     iocb->u.isp24.port_name, 1);
5048                 if (sess) {
5049                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5050                                 "sess %p lid %d|%d DS %d LS %d\n",
5051                                 sess, sess->loop_id, loop_id,
5052                                 sess->disc_state, sess->fw_login_state);
5053                 }
5054
5055                 res = 1; /* send notify ack */
5056                 break;
5057         }
5058
5059         case ELS_FLOGI: /* should never happen */
5060         default:
5061                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5062                     "qla_target(%d): Unsupported ELS command %x "
5063                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5064                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5065                 break;
5066         }
5067
5068         ql_dbg(ql_dbg_disc, vha, 0xf026,
5069             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5070             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5071
5072         return res;
5073 }
5074
5075 /*
5076  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5077  */
5078 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5079         struct imm_ntfy_from_isp *iocb)
5080 {
5081         struct qla_hw_data *ha = vha->hw;
5082         uint32_t add_flags = 0;
5083         int send_notify_ack = 1;
5084         uint16_t status;
5085
5086         status = le16_to_cpu(iocb->u.isp2x.status);
5087         switch (status) {
5088         case IMM_NTFY_LIP_RESET:
5089         {
5090                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5091                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5092                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5093                     iocb->u.isp24.status_subcode);
5094
5095                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5096                         send_notify_ack = 0;
5097                 break;
5098         }
5099
5100         case IMM_NTFY_LIP_LINK_REINIT:
5101         {
5102                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5103                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5104                     "qla_target(%d): LINK REINIT (loop %#x, "
5105                     "subcode %x)\n", vha->vp_idx,
5106                     le16_to_cpu(iocb->u.isp24.nport_handle),
5107                     iocb->u.isp24.status_subcode);
5108                 if (tgt->link_reinit_iocb_pending) {
5109                         qlt_send_notify_ack(ha->base_qpair,
5110                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5111                 }
5112                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5113                 tgt->link_reinit_iocb_pending = 1;
5114                 /*
5115                  * QLogic requires to wait after LINK REINIT for possible
5116                  * PDISC or ADISC ELS commands
5117                  */
5118                 send_notify_ack = 0;
5119                 break;
5120         }
5121
5122         case IMM_NTFY_PORT_LOGOUT:
5123                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5124                     "qla_target(%d): Port logout (loop "
5125                     "%#x, subcode %x)\n", vha->vp_idx,
5126                     le16_to_cpu(iocb->u.isp24.nport_handle),
5127                     iocb->u.isp24.status_subcode);
5128
5129                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5130                         send_notify_ack = 0;
5131                 /* The sessions will be cleared in the callback, if needed */
5132                 break;
5133
5134         case IMM_NTFY_GLBL_TPRLO:
5135                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5136                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5137                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5138                         send_notify_ack = 0;
5139                 /* The sessions will be cleared in the callback, if needed */
5140                 break;
5141
5142         case IMM_NTFY_PORT_CONFIG:
5143                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5144                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5145                     status);
5146                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5147                         send_notify_ack = 0;
5148                 /* The sessions will be cleared in the callback, if needed */
5149                 break;
5150
5151         case IMM_NTFY_GLBL_LOGO:
5152                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5153                     "qla_target(%d): Link failure detected\n",
5154                     vha->vp_idx);
5155                 /* I_T nexus loss */
5156                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5157                         send_notify_ack = 0;
5158                 break;
5159
5160         case IMM_NTFY_IOCB_OVERFLOW:
5161                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5162                     "qla_target(%d): Cannot provide requested "
5163                     "capability (IOCB overflowed the immediate notify "
5164                     "resource count)\n", vha->vp_idx);
5165                 break;
5166
5167         case IMM_NTFY_ABORT_TASK:
5168                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5169                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5170                     "L %#x)\n", vha->vp_idx,
5171                     le16_to_cpu(iocb->u.isp2x.seq_id),
5172                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5173                     le16_to_cpu(iocb->u.isp2x.lun));
5174                 if (qlt_abort_task(vha, iocb) == 0)
5175                         send_notify_ack = 0;
5176                 break;
5177
5178         case IMM_NTFY_RESOURCE:
5179                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5180                     "qla_target(%d): Out of resources, host %ld\n",
5181                     vha->vp_idx, vha->host_no);
5182                 break;
5183
5184         case IMM_NTFY_MSG_RX:
5185                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5186                     "qla_target(%d): Immediate notify task %x\n",
5187                     vha->vp_idx, iocb->u.isp2x.task_flags);
5188                 break;
5189
5190         case IMM_NTFY_ELS:
5191                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5192                         send_notify_ack = 0;
5193                 break;
5194         default:
5195                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5196                     "qla_target(%d): Received unknown immediate "
5197                     "notify status %x\n", vha->vp_idx, status);
5198                 break;
5199         }
5200
5201         if (send_notify_ack)
5202                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5203                     0, 0);
5204 }
5205
5206 /*
5207  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5208  * This function sends busy to ISP 2xxx or 24xx.
5209  */
5210 static int __qlt_send_busy(struct qla_qpair *qpair,
5211         struct atio_from_isp *atio, uint16_t status)
5212 {
5213         struct scsi_qla_host *vha = qpair->vha;
5214         struct ctio7_to_24xx *ctio24;
5215         struct qla_hw_data *ha = vha->hw;
5216         request_t *pkt;
5217         struct fc_port *sess = NULL;
5218         unsigned long flags;
5219         u16 temp;
5220         port_id_t id;
5221
5222         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
5223         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
5224         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
5225         id.b.rsvd_1 = 0;
5226
5227         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5228         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5229         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5230         if (!sess) {
5231                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5232                 return 0;
5233         }
5234         /* Sending marker isn't necessary, since we called from ISR */
5235
5236         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5237         if (!pkt) {
5238                 ql_dbg(ql_dbg_io, vha, 0x3063,
5239                     "qla_target(%d): %s failed: unable to allocate "
5240                     "request packet", vha->vp_idx, __func__);
5241                 return -ENOMEM;
5242         }
5243
5244         qpair->tgt_counters.num_q_full_sent++;
5245         pkt->entry_count = 1;
5246         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5247
5248         ctio24 = (struct ctio7_to_24xx *)pkt;
5249         ctio24->entry_type = CTIO_TYPE7;
5250         ctio24->nport_handle = sess->loop_id;
5251         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5252         ctio24->vp_index = vha->vp_idx;
5253         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5254         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5255         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5256         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5257         temp = (atio->u.isp24.attr << 9) |
5258                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5259                 CTIO7_FLAGS_DONT_RET_CTIO;
5260         ctio24->u.status1.flags = cpu_to_le16(temp);
5261         /*
5262          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5263          * if the explicit conformation is used.
5264          */
5265         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5266         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5267
5268         ctio24->u.status1.residual = get_datalen_for_atio(atio);
5269
5270         if (ctio24->u.status1.residual != 0)
5271                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
5272
5273         /* Memory Barrier */
5274         wmb();
5275         if (qpair->reqq_start_iocbs)
5276                 qpair->reqq_start_iocbs(qpair);
5277         else
5278                 qla2x00_start_iocbs(vha, qpair->req);
5279         return 0;
5280 }
5281
5282 /*
5283  * This routine is used to allocate a command for either a QFull condition
5284  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5285  * out previously.
5286  */
5287 static void
5288 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5289         struct atio_from_isp *atio, uint16_t status, int qfull)
5290 {
5291         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5292         struct qla_hw_data *ha = vha->hw;
5293         struct fc_port *sess;
5294         struct se_session *se_sess;
5295         struct qla_tgt_cmd *cmd;
5296         int tag;
5297         unsigned long flags;
5298
5299         if (unlikely(tgt->tgt_stop)) {
5300                 ql_dbg(ql_dbg_io, vha, 0x300a,
5301                         "New command while device %p is shutting down\n", tgt);
5302                 return;
5303         }
5304
5305         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5306                 vha->hw->tgt.num_qfull_cmds_dropped++;
5307                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5308                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5309                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5310                                 vha->hw->tgt.num_qfull_cmds_dropped;
5311
5312                 ql_dbg(ql_dbg_io, vha, 0x3068,
5313                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5314                         vha->vp_idx, __func__,
5315                         vha->hw->tgt.num_qfull_cmds_dropped);
5316
5317                 qlt_chk_exch_leak_thresh_hold(vha);
5318                 return;
5319         }
5320
5321         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5322                 (vha, atio->u.isp24.fcp_hdr.s_id);
5323         if (!sess)
5324                 return;
5325
5326         se_sess = sess->se_sess;
5327
5328         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5329         if (tag < 0)
5330                 return;
5331
5332         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5333         if (!cmd) {
5334                 ql_dbg(ql_dbg_io, vha, 0x3009,
5335                         "qla_target(%d): %s: Allocation of cmd failed\n",
5336                         vha->vp_idx, __func__);
5337
5338                 vha->hw->tgt.num_qfull_cmds_dropped++;
5339                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5340                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5341                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5342                                 vha->hw->tgt.num_qfull_cmds_dropped;
5343
5344                 qlt_chk_exch_leak_thresh_hold(vha);
5345                 return;
5346         }
5347
5348         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5349
5350         qlt_incr_num_pend_cmds(vha);
5351         INIT_LIST_HEAD(&cmd->cmd_list);
5352         memcpy(&cmd->atio, atio, sizeof(*atio));
5353
5354         cmd->tgt = vha->vha_tgt.qla_tgt;
5355         cmd->vha = vha;
5356         cmd->reset_count = ha->base_qpair->chip_reset;
5357         cmd->q_full = 1;
5358         cmd->qpair = ha->base_qpair;
5359
5360         if (qfull) {
5361                 cmd->q_full = 1;
5362                 /* NOTE: borrowing the state field to carry the status */
5363                 cmd->state = status;
5364         } else
5365                 cmd->term_exchg = 1;
5366
5367         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5368         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5369
5370         vha->hw->tgt.num_qfull_cmds_alloc++;
5371         if (vha->hw->tgt.num_qfull_cmds_alloc >
5372                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5373                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5374                         vha->hw->tgt.num_qfull_cmds_alloc;
5375         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5376 }
5377
5378 int
5379 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5380 {
5381         struct scsi_qla_host *vha = qpair->vha;
5382         struct qla_hw_data *ha = vha->hw;
5383         unsigned long flags;
5384         struct qla_tgt_cmd *cmd, *tcmd;
5385         struct list_head free_list, q_full_list;
5386         int rc = 0;
5387
5388         if (list_empty(&ha->tgt.q_full_list))
5389                 return 0;
5390
5391         INIT_LIST_HEAD(&free_list);
5392         INIT_LIST_HEAD(&q_full_list);
5393
5394         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5395         if (list_empty(&ha->tgt.q_full_list)) {
5396                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5397                 return 0;
5398         }
5399
5400         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5401         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5402
5403         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5404         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5405                 if (cmd->q_full)
5406                         /* cmd->state is a borrowed field to hold status */
5407                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5408                 else if (cmd->term_exchg)
5409                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5410
5411                 if (rc == -ENOMEM)
5412                         break;
5413
5414                 if (cmd->q_full)
5415                         ql_dbg(ql_dbg_io, vha, 0x3006,
5416                             "%s: busy sent for ox_id[%04x]\n", __func__,
5417                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5418                 else if (cmd->term_exchg)
5419                         ql_dbg(ql_dbg_io, vha, 0x3007,
5420                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5421                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5422                 else
5423                         ql_dbg(ql_dbg_io, vha, 0x3008,
5424                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5425                             cmd);
5426
5427                 list_del(&cmd->cmd_list);
5428                 list_add_tail(&cmd->cmd_list, &free_list);
5429
5430                 /* piggy back on hardware_lock for protection */
5431                 vha->hw->tgt.num_qfull_cmds_alloc--;
5432         }
5433         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5434
5435         cmd = NULL;
5436
5437         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5438                 list_del(&cmd->cmd_list);
5439                 /* This cmd was never sent to TCM.  There is no need
5440                  * to schedule free or call free_cmd
5441                  */
5442                 qlt_free_cmd(cmd);
5443         }
5444
5445         if (!list_empty(&q_full_list)) {
5446                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5447                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5448                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5449         }
5450
5451         return rc;
5452 }
5453
5454 static void
5455 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5456     uint16_t status)
5457 {
5458         int rc = 0;
5459         struct scsi_qla_host *vha = qpair->vha;
5460
5461         rc = __qlt_send_busy(qpair, atio, status);
5462         if (rc == -ENOMEM)
5463                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5464 }
5465
5466 static int
5467 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5468         struct atio_from_isp *atio, uint8_t ha_locked)
5469 {
5470         struct qla_hw_data *ha = vha->hw;
5471         unsigned long flags;
5472
5473         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5474                 return 0;
5475
5476         if (!ha_locked)
5477                 spin_lock_irqsave(&ha->hardware_lock, flags);
5478         qlt_send_busy(qpair, atio, qla_sam_status);
5479         if (!ha_locked)
5480                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5481
5482         return 1;
5483 }
5484
5485 /* ha->hardware_lock supposed to be held on entry */
5486 /* called via callback from qla2xxx */
5487 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5488         struct atio_from_isp *atio, uint8_t ha_locked)
5489 {
5490         struct qla_hw_data *ha = vha->hw;
5491         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5492         int rc;
5493         unsigned long flags = 0;
5494
5495         if (unlikely(tgt == NULL)) {
5496                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5497                     "ATIO pkt, but no tgt (ha %p)", ha);
5498                 return;
5499         }
5500         /*
5501          * In tgt_stop mode we also should allow all requests to pass.
5502          * Otherwise, some commands can stuck.
5503          */
5504
5505         tgt->atio_irq_cmd_count++;
5506
5507         switch (atio->u.raw.entry_type) {
5508         case ATIO_TYPE7:
5509                 if (unlikely(atio->u.isp24.exchange_addr ==
5510                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5511                         ql_dbg(ql_dbg_io, vha, 0x3065,
5512                             "qla_target(%d): ATIO_TYPE7 "
5513                             "received with UNKNOWN exchange address, "
5514                             "sending QUEUE_FULL\n", vha->vp_idx);
5515                         if (!ha_locked)
5516                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5517                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5518                         if (!ha_locked)
5519                                 spin_unlock_irqrestore(&ha->hardware_lock,
5520                                     flags);
5521                         break;
5522                 }
5523
5524                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5525                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5526                             atio, ha_locked);
5527                         if (rc != 0) {
5528                                 tgt->atio_irq_cmd_count--;
5529                                 return;
5530                         }
5531                         rc = qlt_handle_cmd_for_atio(vha, atio);
5532                 } else {
5533                         rc = qlt_handle_task_mgmt(vha, atio);
5534                 }
5535                 if (unlikely(rc != 0)) {
5536                         if (!ha_locked)
5537                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5538                         switch (rc) {
5539                         case -ENODEV:
5540                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5541                                     "qla_target: Unable to send command to target\n");
5542                                 break;
5543                         case -EBADF:
5544                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5545                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5546                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5547                                     atio, 1, 0);
5548                                 break;
5549                         case -EBUSY:
5550                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5551                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5552                                     vha->vp_idx);
5553                                 qlt_send_busy(ha->base_qpair, atio,
5554                                     tc_sam_status);
5555                                 break;
5556                         default:
5557                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5558                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5559                                     vha->vp_idx);
5560                                 qlt_send_busy(ha->base_qpair, atio,
5561                                     qla_sam_status);
5562                                 break;
5563                         }
5564                         if (!ha_locked)
5565                                 spin_unlock_irqrestore(&ha->hardware_lock,
5566                                     flags);
5567                 }
5568                 break;
5569
5570         case IMMED_NOTIFY_TYPE:
5571         {
5572                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5573                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5574                             "qla_target(%d): Received ATIO packet %x "
5575                             "with error status %x\n", vha->vp_idx,
5576                             atio->u.raw.entry_type,
5577                             atio->u.isp2x.entry_status);
5578                         break;
5579                 }
5580                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5581
5582                 if (!ha_locked)
5583                         spin_lock_irqsave(&ha->hardware_lock, flags);
5584                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5585                 if (!ha_locked)
5586                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5587                 break;
5588         }
5589
5590         default:
5591                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5592                     "qla_target(%d): Received unknown ATIO atio "
5593                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5594                 break;
5595         }
5596
5597         tgt->atio_irq_cmd_count--;
5598 }
5599
5600 /* ha->hardware_lock supposed to be held on entry */
5601 /* called via callback from qla2xxx */
5602 static void qlt_response_pkt(struct scsi_qla_host *vha,
5603         struct rsp_que *rsp, response_t *pkt)
5604 {
5605         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5606
5607         if (unlikely(tgt == NULL)) {
5608                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5609                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5610                     vha->vp_idx, pkt->entry_type, vha->hw);
5611                 return;
5612         }
5613
5614         /*
5615          * In tgt_stop mode we also should allow all requests to pass.
5616          * Otherwise, some commands can stuck.
5617          */
5618
5619         switch (pkt->entry_type) {
5620         case CTIO_CRC2:
5621         case CTIO_TYPE7:
5622         {
5623                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5624                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5625                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5626                     entry);
5627                 break;
5628         }
5629
5630         case ACCEPT_TGT_IO_TYPE:
5631         {
5632                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5633                 int rc;
5634                 if (atio->u.isp2x.status !=
5635                     cpu_to_le16(ATIO_CDB_VALID)) {
5636                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5637                             "qla_target(%d): ATIO with error "
5638                             "status %x received\n", vha->vp_idx,
5639                             le16_to_cpu(atio->u.isp2x.status));
5640                         break;
5641                 }
5642
5643                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5644                 if (rc != 0)
5645                         return;
5646
5647                 rc = qlt_handle_cmd_for_atio(vha, atio);
5648                 if (unlikely(rc != 0)) {
5649                         switch (rc) {
5650                         case -ENODEV:
5651                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5652                                     "qla_target: Unable to send command to target\n");
5653                                 break;
5654                         case -EBADF:
5655                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5656                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5657                                 qlt_send_term_exchange(rsp->qpair, NULL,
5658                                     atio, 1, 0);
5659                                 break;
5660                         case -EBUSY:
5661                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5662                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5663                                     vha->vp_idx);
5664                                 qlt_send_busy(rsp->qpair, atio,
5665                                     tc_sam_status);
5666                                 break;
5667                         default:
5668                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5669                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5670                                     vha->vp_idx);
5671                                 qlt_send_busy(rsp->qpair, atio,
5672                                     qla_sam_status);
5673                                 break;
5674                         }
5675                 }
5676         }
5677         break;
5678
5679         case CONTINUE_TGT_IO_TYPE:
5680         {
5681                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5682                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5683                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5684                     entry);
5685                 break;
5686         }
5687
5688         case CTIO_A64_TYPE:
5689         {
5690                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5691                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5692                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5693                     entry);
5694                 break;
5695         }
5696
5697         case IMMED_NOTIFY_TYPE:
5698                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5699                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5700                 break;
5701
5702         case NOTIFY_ACK_TYPE:
5703                 if (tgt->notify_ack_expected > 0) {
5704                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5705                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5706                             "NOTIFY_ACK seq %08x status %x\n",
5707                             le16_to_cpu(entry->u.isp2x.seq_id),
5708                             le16_to_cpu(entry->u.isp2x.status));
5709                         tgt->notify_ack_expected--;
5710                         if (entry->u.isp2x.status !=
5711                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5712                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5713                                     "qla_target(%d): NOTIFY_ACK "
5714                                     "failed %x\n", vha->vp_idx,
5715                                     le16_to_cpu(entry->u.isp2x.status));
5716                         }
5717                 } else {
5718                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5719                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5720                             vha->vp_idx);
5721                 }
5722                 break;
5723
5724         case ABTS_RECV_24XX:
5725                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5726                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5727                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5728                 break;
5729
5730         case ABTS_RESP_24XX:
5731                 if (tgt->abts_resp_expected > 0) {
5732                         struct abts_resp_from_24xx_fw *entry =
5733                                 (struct abts_resp_from_24xx_fw *)pkt;
5734                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5735                             "ABTS_RESP_24XX: compl_status %x\n",
5736                             entry->compl_status);
5737                         tgt->abts_resp_expected--;
5738                         if (le16_to_cpu(entry->compl_status) !=
5739                             ABTS_RESP_COMPL_SUCCESS) {
5740                                 if ((entry->error_subcode1 == 0x1E) &&
5741                                     (entry->error_subcode2 == 0)) {
5742                                         /*
5743                                          * We've got a race here: aborted
5744                                          * exchange not terminated, i.e.
5745                                          * response for the aborted command was
5746                                          * sent between the abort request was
5747                                          * received and processed.
5748                                          * Unfortunately, the firmware has a
5749                                          * silly requirement that all aborted
5750                                          * exchanges must be explicitely
5751                                          * terminated, otherwise it refuses to
5752                                          * send responses for the abort
5753                                          * requests. So, we have to
5754                                          * (re)terminate the exchange and retry
5755                                          * the abort response.
5756                                          */
5757                                         qlt_24xx_retry_term_exchange(vha,
5758                                             entry);
5759                                 } else
5760                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5761                                             "qla_target(%d): ABTS_RESP_24XX "
5762                                             "failed %x (subcode %x:%x)",
5763                                             vha->vp_idx, entry->compl_status,
5764                                             entry->error_subcode1,
5765                                             entry->error_subcode2);
5766                         }
5767                 } else {
5768                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5769                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5770                             "received\n", vha->vp_idx);
5771                 }
5772                 break;
5773
5774         default:
5775                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5776                     "qla_target(%d): Received unknown response pkt "
5777                     "type %x\n", vha->vp_idx, pkt->entry_type);
5778                 break;
5779         }
5780
5781 }
5782
5783 /*
5784  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5785  */
5786 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5787         uint16_t *mailbox)
5788 {
5789         struct qla_hw_data *ha = vha->hw;
5790         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5791         int login_code;
5792
5793         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5794                 return;
5795
5796         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5797             IS_QLA2100(ha))
5798                 return;
5799         /*
5800          * In tgt_stop mode we also should allow all requests to pass.
5801          * Otherwise, some commands can stuck.
5802          */
5803
5804
5805         switch (code) {
5806         case MBA_RESET:                 /* Reset */
5807         case MBA_SYSTEM_ERR:            /* System Error */
5808         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5809         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5810                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5811                     "qla_target(%d): System error async event %#x "
5812                     "occurred", vha->vp_idx, code);
5813                 break;
5814         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5815                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5816                 break;
5817
5818         case MBA_LOOP_UP:
5819         {
5820                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5821                     "qla_target(%d): Async LOOP_UP occurred "
5822                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5823                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5824                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5825                 if (tgt->link_reinit_iocb_pending) {
5826                         qlt_send_notify_ack(ha->base_qpair,
5827                             (void *)&tgt->link_reinit_iocb,
5828                             0, 0, 0, 0, 0, 0);
5829                         tgt->link_reinit_iocb_pending = 0;
5830                 }
5831                 break;
5832         }
5833
5834         case MBA_LIP_OCCURRED:
5835         case MBA_LOOP_DOWN:
5836         case MBA_LIP_RESET:
5837         case MBA_RSCN_UPDATE:
5838                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5839                     "qla_target(%d): Async event %#x occurred "
5840                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5841                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5842                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5843                 break;
5844
5845         case MBA_REJECTED_FCP_CMD:
5846                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5847                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5848                     vha->vp_idx,
5849                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5850                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5851
5852                 if (le16_to_cpu(mailbox[3]) == 1) {
5853                         /* exchange starvation. */
5854                         vha->hw->exch_starvation++;
5855                         if (vha->hw->exch_starvation > 5) {
5856                                 ql_log(ql_log_warn, vha, 0xd03a,
5857                                     "Exchange starvation-. Resetting RISC\n");
5858
5859                                 vha->hw->exch_starvation = 0;
5860                                 if (IS_P3P_TYPE(vha->hw))
5861                                         set_bit(FCOE_CTX_RESET_NEEDED,
5862                                             &vha->dpc_flags);
5863                                 else
5864                                         set_bit(ISP_ABORT_NEEDED,
5865                                             &vha->dpc_flags);
5866                                 qla2xxx_wake_dpc(vha);
5867                         }
5868                 }
5869                 break;
5870
5871         case MBA_PORT_UPDATE:
5872                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5873                     "qla_target(%d): Port update async event %#x "
5874                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5875                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5876                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5877                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5878
5879                 login_code = le16_to_cpu(mailbox[2]);
5880                 if (login_code == 0x4) {
5881                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5882                             "Async MB 2: Got PLOGI Complete\n");
5883                         vha->hw->exch_starvation = 0;
5884                 } else if (login_code == 0x7)
5885                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5886                             "Async MB 2: Port Logged Out\n");
5887                 break;
5888         default:
5889                 break;
5890         }
5891
5892 }
5893
5894 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5895         uint16_t loop_id)
5896 {
5897         fc_port_t *fcport, *tfcp, *del;
5898         int rc;
5899         unsigned long flags;
5900         u8 newfcport = 0;
5901
5902         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
5903         if (!fcport) {
5904                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5905                     "qla_target(%d): Allocation of tmp FC port failed",
5906                     vha->vp_idx);
5907                 return NULL;
5908         }
5909
5910         fcport->loop_id = loop_id;
5911
5912         rc = qla24xx_gpdb_wait(vha, fcport, 0);
5913         if (rc != QLA_SUCCESS) {
5914                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5915                     "qla_target(%d): Failed to retrieve fcport "
5916                     "information -- get_port_database() returned %x "
5917                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5918                 kfree(fcport);
5919                 return NULL;
5920         }
5921
5922         del = NULL;
5923         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5924         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5925
5926         if (tfcp) {
5927                 tfcp->d_id = fcport->d_id;
5928                 tfcp->port_type = fcport->port_type;
5929                 tfcp->supported_classes = fcport->supported_classes;
5930                 tfcp->flags |= fcport->flags;
5931                 tfcp->scan_state = QLA_FCPORT_FOUND;
5932
5933                 del = fcport;
5934                 fcport = tfcp;
5935         } else {
5936                 if (vha->hw->current_topology == ISP_CFG_F)
5937                         fcport->flags |= FCF_FABRIC_DEVICE;
5938
5939                 list_add_tail(&fcport->list, &vha->vp_fcports);
5940                 if (!IS_SW_RESV_ADDR(fcport->d_id))
5941                    vha->fcport_count++;
5942                 fcport->login_gen++;
5943                 fcport->disc_state = DSC_LOGIN_COMPLETE;
5944                 fcport->login_succ = 1;
5945                 newfcport = 1;
5946         }
5947
5948         fcport->deleted = 0;
5949         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
5950
5951         switch (vha->host->active_mode) {
5952         case MODE_INITIATOR:
5953         case MODE_DUAL:
5954                 if (newfcport) {
5955                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5956                                 ql_dbg(ql_dbg_disc, vha, 0x20fe,
5957                                    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
5958                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5959                                 qla24xx_post_upd_fcport_work(vha, fcport);
5960                         } else {
5961                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
5962                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
5963                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5964                                 qla24xx_post_gpsc_work(vha, fcport);
5965                         }
5966                 }
5967                 break;
5968
5969         case MODE_TARGET:
5970         default:
5971                 break;
5972         }
5973         if (del)
5974                 qla2x00_free_fcport(del);
5975
5976         return fcport;
5977 }
5978
5979 /* Must be called under tgt_mutex */
5980 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5981         uint8_t *s_id)
5982 {
5983         struct fc_port *sess = NULL;
5984         fc_port_t *fcport = NULL;
5985         int rc, global_resets;
5986         uint16_t loop_id = 0;
5987
5988         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
5989                 /*
5990                  * This is Domain Controller, so it should be
5991                  * OK to drop SCSI commands from it.
5992                  */
5993                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5994                     "Unable to find initiator with S_ID %x:%x:%x",
5995                     s_id[0], s_id[1], s_id[2]);
5996                 return NULL;
5997         }
5998
5999         mutex_lock(&vha->vha_tgt.tgt_mutex);
6000
6001 retry:
6002         global_resets =
6003             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6004
6005         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6006         if (rc != 0) {
6007                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6008
6009                 ql_log(ql_log_info, vha, 0xf071,
6010                     "qla_target(%d): Unable to find "
6011                     "initiator with S_ID %x:%x:%x",
6012                     vha->vp_idx, s_id[0], s_id[1],
6013                     s_id[2]);
6014
6015                 if (rc == -ENOENT) {
6016                         qlt_port_logo_t logo;
6017                         sid_to_portid(s_id, &logo.id);
6018                         logo.cmd_count = 1;
6019                         qlt_send_first_logo(vha, &logo);
6020                 }
6021
6022                 return NULL;
6023         }
6024
6025         fcport = qlt_get_port_database(vha, loop_id);
6026         if (!fcport) {
6027                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6028                 return NULL;
6029         }
6030
6031         if (global_resets !=
6032             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6033                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6034                     "qla_target(%d): global reset during session discovery "
6035                     "(counter was %d, new %d), retrying", vha->vp_idx,
6036                     global_resets,
6037                     atomic_read(&vha->vha_tgt.
6038                         qla_tgt->tgt_global_resets_count));
6039                 goto retry;
6040         }
6041
6042         sess = qlt_create_sess(vha, fcport, true);
6043
6044         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6045
6046         return sess;
6047 }
6048
6049 static void qlt_abort_work(struct qla_tgt *tgt,
6050         struct qla_tgt_sess_work_param *prm)
6051 {
6052         struct scsi_qla_host *vha = tgt->vha;
6053         struct qla_hw_data *ha = vha->hw;
6054         struct fc_port *sess = NULL;
6055         unsigned long flags = 0, flags2 = 0;
6056         uint32_t be_s_id;
6057         uint8_t s_id[3];
6058         int rc;
6059
6060         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6061
6062         if (tgt->tgt_stop)
6063                 goto out_term2;
6064
6065         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
6066         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
6067         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
6068
6069         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
6070             (unsigned char *)&be_s_id);
6071         if (!sess) {
6072                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6073
6074                 sess = qlt_make_local_sess(vha, s_id);
6075                 /* sess has got an extra creation ref */
6076
6077                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6078                 if (!sess)
6079                         goto out_term2;
6080         } else {
6081                 if (sess->deleted) {
6082                         sess = NULL;
6083                         goto out_term2;
6084                 }
6085
6086                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6087                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6088                             "%s: kref_get fail %8phC \n",
6089                              __func__, sess->port_name);
6090                         sess = NULL;
6091                         goto out_term2;
6092                 }
6093         }
6094
6095         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6096         ha->tgt.tgt_ops->put_sess(sess);
6097         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6098
6099         if (rc != 0)
6100                 goto out_term;
6101         return;
6102
6103 out_term2:
6104         if (sess)
6105                 ha->tgt.tgt_ops->put_sess(sess);
6106         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6107
6108 out_term:
6109         spin_lock_irqsave(&ha->hardware_lock, flags);
6110         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6111             FCP_TMF_REJECTED, false);
6112         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6113 }
6114
6115 static void qlt_tmr_work(struct qla_tgt *tgt,
6116         struct qla_tgt_sess_work_param *prm)
6117 {
6118         struct atio_from_isp *a = &prm->tm_iocb2;
6119         struct scsi_qla_host *vha = tgt->vha;
6120         struct qla_hw_data *ha = vha->hw;
6121         struct fc_port *sess = NULL;
6122         unsigned long flags;
6123         uint8_t *s_id = NULL; /* to hide compiler warnings */
6124         int rc;
6125         u64 unpacked_lun;
6126         int fn;
6127         void *iocb;
6128
6129         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6130
6131         if (tgt->tgt_stop)
6132                 goto out_term2;
6133
6134         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6135         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6136         if (!sess) {
6137                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6138
6139                 sess = qlt_make_local_sess(vha, s_id);
6140                 /* sess has got an extra creation ref */
6141
6142                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6143                 if (!sess)
6144                         goto out_term2;
6145         } else {
6146                 if (sess->deleted) {
6147                         sess = NULL;
6148                         goto out_term2;
6149                 }
6150
6151                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6152                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6153                             "%s: kref_get fail %8phC\n",
6154                              __func__, sess->port_name);
6155                         sess = NULL;
6156                         goto out_term2;
6157                 }
6158         }
6159
6160         iocb = a;
6161         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6162         unpacked_lun =
6163             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6164
6165         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6166         ha->tgt.tgt_ops->put_sess(sess);
6167         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6168
6169         if (rc != 0)
6170                 goto out_term;
6171         return;
6172
6173 out_term2:
6174         if (sess)
6175                 ha->tgt.tgt_ops->put_sess(sess);
6176         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6177 out_term:
6178         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6179 }
6180
6181 static void qlt_sess_work_fn(struct work_struct *work)
6182 {
6183         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6184         struct scsi_qla_host *vha = tgt->vha;
6185         unsigned long flags;
6186
6187         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6188
6189         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6190         while (!list_empty(&tgt->sess_works_list)) {
6191                 struct qla_tgt_sess_work_param *prm = list_entry(
6192                     tgt->sess_works_list.next, typeof(*prm),
6193                     sess_works_list_entry);
6194
6195                 /*
6196                  * This work can be scheduled on several CPUs at time, so we
6197                  * must delete the entry to eliminate double processing
6198                  */
6199                 list_del(&prm->sess_works_list_entry);
6200
6201                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6202
6203                 switch (prm->type) {
6204                 case QLA_TGT_SESS_WORK_ABORT:
6205                         qlt_abort_work(tgt, prm);
6206                         break;
6207                 case QLA_TGT_SESS_WORK_TM:
6208                         qlt_tmr_work(tgt, prm);
6209                         break;
6210                 default:
6211                         BUG_ON(1);
6212                         break;
6213                 }
6214
6215                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6216
6217                 kfree(prm);
6218         }
6219         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6220 }
6221
6222 /* Must be called under tgt_host_action_mutex */
6223 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6224 {
6225         struct qla_tgt *tgt;
6226         int rc, i;
6227         struct qla_qpair_hint *h;
6228
6229         if (!QLA_TGT_MODE_ENABLED())
6230                 return 0;
6231
6232         if (!IS_TGT_MODE_CAPABLE(ha)) {
6233                 ql_log(ql_log_warn, base_vha, 0xe070,
6234                     "This adapter does not support target mode.\n");
6235                 return 0;
6236         }
6237
6238         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6239             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6240
6241         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6242
6243         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6244         if (!tgt) {
6245                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6246                     "Unable to allocate struct qla_tgt\n");
6247                 return -ENOMEM;
6248         }
6249
6250         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6251                                sizeof(struct qla_qpair_hint),
6252                                GFP_KERNEL);
6253         if (!tgt->qphints) {
6254                 kfree(tgt);
6255                 ql_log(ql_log_warn, base_vha, 0x0197,
6256                     "Unable to allocate qpair hints.\n");
6257                 return -ENOMEM;
6258         }
6259
6260         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6261                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6262
6263         rc = btree_init64(&tgt->lun_qpair_map);
6264         if (rc) {
6265                 kfree(tgt->qphints);
6266                 kfree(tgt);
6267                 ql_log(ql_log_info, base_vha, 0x0198,
6268                         "Unable to initialize lun_qpair_map btree\n");
6269                 return -EIO;
6270         }
6271         h = &tgt->qphints[0];
6272         h->qpair = ha->base_qpair;
6273         INIT_LIST_HEAD(&h->hint_elem);
6274         h->cpuid = ha->base_qpair->cpuid;
6275         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6276
6277         for (i = 0; i < ha->max_qpairs; i++) {
6278                 unsigned long flags;
6279
6280                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6281                 h = &tgt->qphints[i + 1];
6282                 INIT_LIST_HEAD(&h->hint_elem);
6283                 if (qpair) {
6284                         h->qpair = qpair;
6285                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6286                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6287                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6288                         h->cpuid = qpair->cpuid;
6289                 }
6290         }
6291
6292         tgt->ha = ha;
6293         tgt->vha = base_vha;
6294         init_waitqueue_head(&tgt->waitQ);
6295         INIT_LIST_HEAD(&tgt->del_sess_list);
6296         spin_lock_init(&tgt->sess_work_lock);
6297         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6298         INIT_LIST_HEAD(&tgt->sess_works_list);
6299         atomic_set(&tgt->tgt_global_resets_count, 0);
6300
6301         base_vha->vha_tgt.qla_tgt = tgt;
6302
6303         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6304                 "qla_target(%d): using 64 Bit PCI addressing",
6305                 base_vha->vp_idx);
6306         /* 3 is reserved */
6307         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6308
6309         mutex_lock(&qla_tgt_mutex);
6310         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6311         mutex_unlock(&qla_tgt_mutex);
6312
6313         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6314                 ha->tgt.tgt_ops->add_target(base_vha);
6315
6316         return 0;
6317 }
6318
6319 /* Must be called under tgt_host_action_mutex */
6320 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6321 {
6322         if (!vha->vha_tgt.qla_tgt)
6323                 return 0;
6324
6325         if (vha->fc_vport) {
6326                 qlt_release(vha->vha_tgt.qla_tgt);
6327                 return 0;
6328         }
6329
6330         /* free left over qfull cmds */
6331         qlt_init_term_exchange(vha);
6332
6333         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6334             vha->host_no, ha);
6335         qlt_release(vha->vha_tgt.qla_tgt);
6336
6337         return 0;
6338 }
6339
6340 void qlt_remove_target_resources(struct qla_hw_data *ha)
6341 {
6342         struct scsi_qla_host *node;
6343         u32 key = 0;
6344
6345         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6346                 btree_remove32(&ha->tgt.host_map, key);
6347
6348         btree_destroy32(&ha->tgt.host_map);
6349 }
6350
6351 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6352         unsigned char *b)
6353 {
6354         int i;
6355
6356         pr_debug("qla2xxx HW vha->node_name: ");
6357         for (i = 0; i < WWN_SIZE; i++)
6358                 pr_debug("%02x ", vha->node_name[i]);
6359         pr_debug("\n");
6360         pr_debug("qla2xxx HW vha->port_name: ");
6361         for (i = 0; i < WWN_SIZE; i++)
6362                 pr_debug("%02x ", vha->port_name[i]);
6363         pr_debug("\n");
6364
6365         pr_debug("qla2xxx passed configfs WWPN: ");
6366         put_unaligned_be64(wwpn, b);
6367         for (i = 0; i < WWN_SIZE; i++)
6368                 pr_debug("%02x ", b[i]);
6369         pr_debug("\n");
6370 }
6371
6372 /**
6373  * qla_tgt_lport_register - register lport with external module
6374  *
6375  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6376  * @phys_wwpn:
6377  * @npiv_wwpn:
6378  * @npiv_wwnn:
6379  * @callback:  lport initialization callback for tcm_qla2xxx code
6380  */
6381 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6382                        u64 npiv_wwpn, u64 npiv_wwnn,
6383                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6384 {
6385         struct qla_tgt *tgt;
6386         struct scsi_qla_host *vha;
6387         struct qla_hw_data *ha;
6388         struct Scsi_Host *host;
6389         unsigned long flags;
6390         int rc;
6391         u8 b[WWN_SIZE];
6392
6393         mutex_lock(&qla_tgt_mutex);
6394         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6395                 vha = tgt->vha;
6396                 ha = vha->hw;
6397
6398                 host = vha->host;
6399                 if (!host)
6400                         continue;
6401
6402                 if (!(host->hostt->supported_mode & MODE_TARGET))
6403                         continue;
6404
6405                 spin_lock_irqsave(&ha->hardware_lock, flags);
6406                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6407                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6408                             host->host_no);
6409                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6410                         continue;
6411                 }
6412                 if (tgt->tgt_stop) {
6413                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6414                                  host->host_no);
6415                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6416                         continue;
6417                 }
6418                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6419
6420                 if (!scsi_host_get(host)) {
6421                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6422                             "Unable to scsi_host_get() for"
6423                             " qla2xxx scsi_host\n");
6424                         continue;
6425                 }
6426                 qlt_lport_dump(vha, phys_wwpn, b);
6427
6428                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6429                         scsi_host_put(host);
6430                         continue;
6431                 }
6432                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6433                 if (rc != 0)
6434                         scsi_host_put(host);
6435
6436                 mutex_unlock(&qla_tgt_mutex);
6437                 return rc;
6438         }
6439         mutex_unlock(&qla_tgt_mutex);
6440
6441         return -ENODEV;
6442 }
6443 EXPORT_SYMBOL(qlt_lport_register);
6444
6445 /**
6446  * qla_tgt_lport_deregister - Degister lport
6447  *
6448  * @vha:  Registered scsi_qla_host pointer
6449  */
6450 void qlt_lport_deregister(struct scsi_qla_host *vha)
6451 {
6452         struct qla_hw_data *ha = vha->hw;
6453         struct Scsi_Host *sh = vha->host;
6454         /*
6455          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6456          */
6457         vha->vha_tgt.target_lport_ptr = NULL;
6458         ha->tgt.tgt_ops = NULL;
6459         /*
6460          * Release the Scsi_Host reference for the underlying qla2xxx host
6461          */
6462         scsi_host_put(sh);
6463 }
6464 EXPORT_SYMBOL(qlt_lport_deregister);
6465
6466 /* Must be called under HW lock */
6467 static void qlt_set_mode(struct scsi_qla_host *vha)
6468 {
6469         switch (ql2x_ini_mode) {
6470         case QLA2XXX_INI_MODE_DISABLED:
6471         case QLA2XXX_INI_MODE_EXCLUSIVE:
6472                 vha->host->active_mode = MODE_TARGET;
6473                 break;
6474         case QLA2XXX_INI_MODE_ENABLED:
6475                 vha->host->active_mode = MODE_UNKNOWN;
6476                 break;
6477         case QLA2XXX_INI_MODE_DUAL:
6478                 vha->host->active_mode = MODE_DUAL;
6479                 break;
6480         default:
6481                 break;
6482         }
6483 }
6484
6485 /* Must be called under HW lock */
6486 static void qlt_clear_mode(struct scsi_qla_host *vha)
6487 {
6488         switch (ql2x_ini_mode) {
6489         case QLA2XXX_INI_MODE_DISABLED:
6490                 vha->host->active_mode = MODE_UNKNOWN;
6491                 break;
6492         case QLA2XXX_INI_MODE_EXCLUSIVE:
6493                 vha->host->active_mode = MODE_INITIATOR;
6494                 break;
6495         case QLA2XXX_INI_MODE_ENABLED:
6496         case QLA2XXX_INI_MODE_DUAL:
6497                 vha->host->active_mode = MODE_INITIATOR;
6498                 break;
6499         default:
6500                 break;
6501         }
6502 }
6503
6504 /*
6505  * qla_tgt_enable_vha - NO LOCK HELD
6506  *
6507  * host_reset, bring up w/ Target Mode Enabled
6508  */
6509 void
6510 qlt_enable_vha(struct scsi_qla_host *vha)
6511 {
6512         struct qla_hw_data *ha = vha->hw;
6513         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6514         unsigned long flags;
6515         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6516
6517         if (!tgt) {
6518                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6519                     "Unable to locate qla_tgt pointer from"
6520                     " struct qla_hw_data\n");
6521                 dump_stack();
6522                 return;
6523         }
6524
6525         spin_lock_irqsave(&ha->hardware_lock, flags);
6526         tgt->tgt_stopped = 0;
6527         qlt_set_mode(vha);
6528         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6529
6530         if (vha->vp_idx) {
6531                 qla24xx_disable_vp(vha);
6532                 qla24xx_enable_vp(vha);
6533         } else {
6534                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6535                 qla2xxx_wake_dpc(base_vha);
6536                 qla2x00_wait_for_hba_online(base_vha);
6537         }
6538 }
6539 EXPORT_SYMBOL(qlt_enable_vha);
6540
6541 /*
6542  * qla_tgt_disable_vha - NO LOCK HELD
6543  *
6544  * Disable Target Mode and reset the adapter
6545  */
6546 static void qlt_disable_vha(struct scsi_qla_host *vha)
6547 {
6548         struct qla_hw_data *ha = vha->hw;
6549         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6550         unsigned long flags;
6551
6552         if (!tgt) {
6553                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6554                     "Unable to locate qla_tgt pointer from"
6555                     " struct qla_hw_data\n");
6556                 dump_stack();
6557                 return;
6558         }
6559
6560         spin_lock_irqsave(&ha->hardware_lock, flags);
6561         qlt_clear_mode(vha);
6562         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6563
6564         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6565         qla2xxx_wake_dpc(vha);
6566         qla2x00_wait_for_hba_online(vha);
6567 }
6568
6569 /*
6570  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6571  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6572  * members.
6573  */
6574 void
6575 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6576 {
6577         vha->vha_tgt.qla_tgt = NULL;
6578
6579         mutex_init(&vha->vha_tgt.tgt_mutex);
6580         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6581
6582         qlt_clear_mode(vha);
6583
6584         /*
6585          * NOTE: Currently the value is kept the same for <24xx and
6586          * >=24xx ISPs. If it is necessary to change it,
6587          * the check should be added for specific ISPs,
6588          * assigning the value appropriately.
6589          */
6590         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6591
6592         qlt_add_target(ha, vha);
6593 }
6594
6595 u8
6596 qlt_rff_id(struct scsi_qla_host *vha)
6597 {
6598         u8 fc4_feature = 0;
6599         /*
6600          * FC-4 Feature bit 0 indicates target functionality to the name server.
6601          */
6602         if (qla_tgt_mode_enabled(vha)) {
6603                 fc4_feature = BIT_0;
6604         } else if (qla_ini_mode_enabled(vha)) {
6605                 fc4_feature = BIT_1;
6606         } else if (qla_dual_mode_enabled(vha))
6607                 fc4_feature = BIT_0 | BIT_1;
6608
6609         return fc4_feature;
6610 }
6611
6612 /*
6613  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6614  * @ha: HA context
6615  *
6616  * Beginning of ATIO ring has initialization control block already built
6617  * by nvram config routine.
6618  *
6619  * Returns 0 on success.
6620  */
6621 void
6622 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6623 {
6624         struct qla_hw_data *ha = vha->hw;
6625         uint16_t cnt;
6626         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6627
6628         if (qla_ini_mode_enabled(vha))
6629                 return;
6630
6631         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6632                 pkt->u.raw.signature = ATIO_PROCESSED;
6633                 pkt++;
6634         }
6635
6636 }
6637
6638 /*
6639  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6640  * @ha: SCSI driver HA context
6641  */
6642 void
6643 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6644 {
6645         struct qla_hw_data *ha = vha->hw;
6646         struct atio_from_isp *pkt;
6647         int cnt, i;
6648
6649         if (!ha->flags.fw_started)
6650                 return;
6651
6652         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6653             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6654                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6655                 cnt = pkt->u.raw.entry_count;
6656
6657                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6658                         /*
6659                          * This packet is corrupted. The header + payload
6660                          * can not be trusted. There is no point in passing
6661                          * it further up.
6662                          */
6663                         ql_log(ql_log_warn, vha, 0xd03c,
6664                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6665                             pkt->u.isp24.fcp_hdr.s_id,
6666                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6667                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6668
6669                         adjust_corrupted_atio(pkt);
6670                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6671                             ha_locked, 0);
6672                 } else {
6673                         qlt_24xx_atio_pkt_all_vps(vha,
6674                             (struct atio_from_isp *)pkt, ha_locked);
6675                 }
6676
6677                 for (i = 0; i < cnt; i++) {
6678                         ha->tgt.atio_ring_index++;
6679                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6680                                 ha->tgt.atio_ring_index = 0;
6681                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6682                         } else
6683                                 ha->tgt.atio_ring_ptr++;
6684
6685                         pkt->u.raw.signature = ATIO_PROCESSED;
6686                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6687                 }
6688                 wmb();
6689         }
6690
6691         /* Adjust ring index */
6692         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6693 }
6694
6695 void
6696 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6697 {
6698         struct qla_hw_data *ha = vha->hw;
6699         struct qla_msix_entry *msix = &ha->msix_entries[2];
6700         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6701
6702         if (!QLA_TGT_MODE_ENABLED())
6703                 return;
6704
6705         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6706         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6707         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6708
6709         if (ha->flags.msix_enabled) {
6710                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6711                         if (IS_QLA2071(ha)) {
6712                                 /* 4 ports Baker: Enable Interrupt Handshake */
6713                                 icb->msix_atio = 0;
6714                                 icb->firmware_options_2 |= BIT_26;
6715                         } else {
6716                                 icb->msix_atio = cpu_to_le16(msix->entry);
6717                                 icb->firmware_options_2 &= ~BIT_26;
6718                         }
6719                         ql_dbg(ql_dbg_init, vha, 0xf072,
6720                             "Registering ICB vector 0x%x for atio que.\n",
6721                             msix->entry);
6722                 }
6723         } else {
6724                 /* INTx|MSI */
6725                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6726                         icb->msix_atio = 0;
6727                         icb->firmware_options_2 |= BIT_26;
6728                         ql_dbg(ql_dbg_init, vha, 0xf072,
6729                             "%s: Use INTx for ATIOQ.\n", __func__);
6730                 }
6731         }
6732 }
6733
6734 void
6735 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6736 {
6737         struct qla_hw_data *ha = vha->hw;
6738         u32 tmp;
6739
6740         if (!QLA_TGT_MODE_ENABLED())
6741                 return;
6742
6743         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6744                 if (!ha->tgt.saved_set) {
6745                         /* We save only once */
6746                         ha->tgt.saved_exchange_count = nv->exchange_count;
6747                         ha->tgt.saved_firmware_options_1 =
6748                             nv->firmware_options_1;
6749                         ha->tgt.saved_firmware_options_2 =
6750                             nv->firmware_options_2;
6751                         ha->tgt.saved_firmware_options_3 =
6752                             nv->firmware_options_3;
6753                         ha->tgt.saved_set = 1;
6754                 }
6755
6756                 if (qla_tgt_mode_enabled(vha))
6757                         nv->exchange_count = cpu_to_le16(0xFFFF);
6758                 else                    /* dual */
6759                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6760
6761                 /* Enable target mode */
6762                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6763
6764                 /* Disable ini mode, if requested */
6765                 if (qla_tgt_mode_enabled(vha))
6766                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6767
6768                 /* Disable Full Login after LIP */
6769                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6770                 /* Enable initial LIP */
6771                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6772                 if (ql2xtgt_tape_enable)
6773                         /* Enable FC Tape support */
6774                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6775                 else
6776                         /* Disable FC Tape support */
6777                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6778
6779                 /* Disable Full Login after LIP */
6780                 nv->host_p &= cpu_to_le32(~BIT_10);
6781
6782                 /*
6783                  * clear BIT 15 explicitly as we have seen at least
6784                  * a couple of instances where this was set and this
6785                  * was causing the firmware to not be initialized.
6786                  */
6787                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6788                 /* Enable target PRLI control */
6789                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6790
6791                 if (IS_QLA25XX(ha)) {
6792                         /* Change Loop-prefer to Pt-Pt */
6793                         tmp = ~(BIT_4|BIT_5|BIT_6);
6794                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6795                         tmp = P2P << 4;
6796                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6797                 }
6798         } else {
6799                 if (ha->tgt.saved_set) {
6800                         nv->exchange_count = ha->tgt.saved_exchange_count;
6801                         nv->firmware_options_1 =
6802                             ha->tgt.saved_firmware_options_1;
6803                         nv->firmware_options_2 =
6804                             ha->tgt.saved_firmware_options_2;
6805                         nv->firmware_options_3 =
6806                             ha->tgt.saved_firmware_options_3;
6807                 }
6808                 return;
6809         }
6810
6811         if (ha->base_qpair->enable_class_2) {
6812                 if (vha->flags.init_done)
6813                         fc_host_supported_classes(vha->host) =
6814                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6815
6816                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6817         } else {
6818                 if (vha->flags.init_done)
6819                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6820
6821                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6822         }
6823 }
6824
6825 void
6826 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6827         struct init_cb_24xx *icb)
6828 {
6829         struct qla_hw_data *ha = vha->hw;
6830
6831         if (!QLA_TGT_MODE_ENABLED())
6832                 return;
6833
6834         if (ha->tgt.node_name_set) {
6835                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6836                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6837         }
6838
6839         /* disable ZIO at start time. */
6840         if (!vha->flags.init_done) {
6841                 uint32_t tmp;
6842                 tmp = le32_to_cpu(icb->firmware_options_2);
6843                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6844                 icb->firmware_options_2 = cpu_to_le32(tmp);
6845         }
6846 }
6847
6848 void
6849 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6850 {
6851         struct qla_hw_data *ha = vha->hw;
6852         u32 tmp;
6853
6854         if (!QLA_TGT_MODE_ENABLED())
6855                 return;
6856
6857         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6858                 if (!ha->tgt.saved_set) {
6859                         /* We save only once */
6860                         ha->tgt.saved_exchange_count = nv->exchange_count;
6861                         ha->tgt.saved_firmware_options_1 =
6862                             nv->firmware_options_1;
6863                         ha->tgt.saved_firmware_options_2 =
6864                             nv->firmware_options_2;
6865                         ha->tgt.saved_firmware_options_3 =
6866                             nv->firmware_options_3;
6867                         ha->tgt.saved_set = 1;
6868                 }
6869
6870                 if (qla_tgt_mode_enabled(vha))
6871                         nv->exchange_count = cpu_to_le16(0xFFFF);
6872                 else                    /* dual */
6873                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6874
6875                 /* Enable target mode */
6876                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6877
6878                 /* Disable ini mode, if requested */
6879                 if (qla_tgt_mode_enabled(vha))
6880                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6881                 /* Disable Full Login after LIP */
6882                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6883                 /* Enable initial LIP */
6884                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6885                 /*
6886                  * clear BIT 15 explicitly as we have seen at
6887                  * least a couple of instances where this was set
6888                  * and this was causing the firmware to not be
6889                  * initialized.
6890                  */
6891                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6892                 if (ql2xtgt_tape_enable)
6893                         /* Enable FC tape support */
6894                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6895                 else
6896                         /* Disable FC tape support */
6897                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6898
6899                 /* Disable Full Login after LIP */
6900                 nv->host_p &= cpu_to_le32(~BIT_10);
6901                 /* Enable target PRLI control */
6902                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6903
6904                 /* Change Loop-prefer to Pt-Pt */
6905                 tmp = ~(BIT_4|BIT_5|BIT_6);
6906                 nv->firmware_options_2 &= cpu_to_le32(tmp);
6907                 tmp = P2P << 4;
6908                 nv->firmware_options_2 |= cpu_to_le32(tmp);
6909         } else {
6910                 if (ha->tgt.saved_set) {
6911                         nv->exchange_count = ha->tgt.saved_exchange_count;
6912                         nv->firmware_options_1 =
6913                             ha->tgt.saved_firmware_options_1;
6914                         nv->firmware_options_2 =
6915                             ha->tgt.saved_firmware_options_2;
6916                         nv->firmware_options_3 =
6917                             ha->tgt.saved_firmware_options_3;
6918                 }
6919                 return;
6920         }
6921
6922         if (ha->base_qpair->enable_class_2) {
6923                 if (vha->flags.init_done)
6924                         fc_host_supported_classes(vha->host) =
6925                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6926
6927                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6928         } else {
6929                 if (vha->flags.init_done)
6930                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6931
6932                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6933         }
6934 }
6935
6936 void
6937 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6938         struct init_cb_81xx *icb)
6939 {
6940         struct qla_hw_data *ha = vha->hw;
6941
6942         if (!QLA_TGT_MODE_ENABLED())
6943                 return;
6944
6945         if (ha->tgt.node_name_set) {
6946                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6947                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6948         }
6949
6950         /* disable ZIO at start time. */
6951         if (!vha->flags.init_done) {
6952                 uint32_t tmp;
6953                 tmp = le32_to_cpu(icb->firmware_options_2);
6954                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6955                 icb->firmware_options_2 = cpu_to_le32(tmp);
6956         }
6957
6958 }
6959
6960 void
6961 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6962 {
6963         if (!QLA_TGT_MODE_ENABLED())
6964                 return;
6965
6966         ha->msix_count += 1; /* For ATIO Q */
6967 }
6968
6969
6970 void
6971 qlt_modify_vp_config(struct scsi_qla_host *vha,
6972         struct vp_config_entry_24xx *vpmod)
6973 {
6974         /* enable target mode.  Bit5 = 1 => disable */
6975         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6976                 vpmod->options_idx1 &= ~BIT_5;
6977
6978         /* Disable ini mode, if requested.  bit4 = 1 => disable */
6979         if (qla_tgt_mode_enabled(vha))
6980                 vpmod->options_idx1 &= ~BIT_4;
6981 }
6982
6983 void
6984 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6985 {
6986         int rc;
6987
6988         if (!QLA_TGT_MODE_ENABLED())
6989                 return;
6990
6991         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6992                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6993                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6994         } else {
6995                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6996                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6997         }
6998
6999         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7000         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7001
7002         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7003         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7004             qlt_unknown_atio_work_fn);
7005
7006         qlt_clear_mode(base_vha);
7007
7008         rc = btree_init32(&ha->tgt.host_map);
7009         if (rc)
7010                 ql_log(ql_log_info, base_vha, 0xd03d,
7011                     "Unable to initialize ha->host_map btree\n");
7012
7013         qlt_update_vp_map(base_vha, SET_VP_IDX);
7014 }
7015
7016 irqreturn_t
7017 qla83xx_msix_atio_q(int irq, void *dev_id)
7018 {
7019         struct rsp_que *rsp;
7020         scsi_qla_host_t *vha;
7021         struct qla_hw_data *ha;
7022         unsigned long flags;
7023
7024         rsp = (struct rsp_que *) dev_id;
7025         ha = rsp->hw;
7026         vha = pci_get_drvdata(ha->pdev);
7027
7028         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7029
7030         qlt_24xx_process_atio_queue(vha, 0);
7031
7032         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7033
7034         return IRQ_HANDLED;
7035 }
7036
7037 static void
7038 qlt_handle_abts_recv_work(struct work_struct *work)
7039 {
7040         struct qla_tgt_sess_op *op = container_of(work,
7041                 struct qla_tgt_sess_op, work);
7042         scsi_qla_host_t *vha = op->vha;
7043         struct qla_hw_data *ha = vha->hw;
7044         unsigned long flags;
7045
7046         if (qla2x00_reset_active(vha) ||
7047             (op->chip_reset != ha->base_qpair->chip_reset))
7048                 return;
7049
7050         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7051         qlt_24xx_process_atio_queue(vha, 0);
7052         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7053
7054         spin_lock_irqsave(&ha->hardware_lock, flags);
7055         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7056         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7057
7058         kfree(op);
7059 }
7060
7061 void
7062 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7063     response_t *pkt)
7064 {
7065         struct qla_tgt_sess_op *op;
7066
7067         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7068
7069         if (!op) {
7070                 /* do not reach for ATIO queue here.  This is best effort err
7071                  * recovery at this point.
7072                  */
7073                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7074                 return;
7075         }
7076
7077         memcpy(&op->atio, pkt, sizeof(*pkt));
7078         op->vha = vha;
7079         op->chip_reset = vha->hw->base_qpair->chip_reset;
7080         op->rsp = rsp;
7081         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7082         queue_work(qla_tgt_wq, &op->work);
7083         return;
7084 }
7085
7086 int
7087 qlt_mem_alloc(struct qla_hw_data *ha)
7088 {
7089         if (!QLA_TGT_MODE_ENABLED())
7090                 return 0;
7091
7092         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7093                                      sizeof(struct qla_tgt_vp_map),
7094                                      GFP_KERNEL);
7095         if (!ha->tgt.tgt_vp_map)
7096                 return -ENOMEM;
7097
7098         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7099             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7100             &ha->tgt.atio_dma, GFP_KERNEL);
7101         if (!ha->tgt.atio_ring) {
7102                 kfree(ha->tgt.tgt_vp_map);
7103                 return -ENOMEM;
7104         }
7105         return 0;
7106 }
7107
7108 void
7109 qlt_mem_free(struct qla_hw_data *ha)
7110 {
7111         if (!QLA_TGT_MODE_ENABLED())
7112                 return;
7113
7114         if (ha->tgt.atio_ring) {
7115                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7116                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7117                     ha->tgt.atio_dma);
7118         }
7119         kfree(ha->tgt.tgt_vp_map);
7120 }
7121
7122 /* vport_slock to be held by the caller */
7123 void
7124 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7125 {
7126         void *slot;
7127         u32 key;
7128         int rc;
7129
7130         if (!QLA_TGT_MODE_ENABLED())
7131                 return;
7132
7133         key = vha->d_id.b24;
7134
7135         switch (cmd) {
7136         case SET_VP_IDX:
7137                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7138                 break;
7139         case SET_AL_PA:
7140                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7141                 if (!slot) {
7142                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7143                             "Save vha in host_map %p %06x\n", vha, key);
7144                         rc = btree_insert32(&vha->hw->tgt.host_map,
7145                                 key, vha, GFP_ATOMIC);
7146                         if (rc)
7147                                 ql_log(ql_log_info, vha, 0xd03e,
7148                                     "Unable to insert s_id into host_map: %06x\n",
7149                                     key);
7150                         return;
7151                 }
7152                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7153                     "replace existing vha in host_map %p %06x\n", vha, key);
7154                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7155                 break;
7156         case RESET_VP_IDX:
7157                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7158                 break;
7159         case RESET_AL_PA:
7160                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7161                    "clear vha in host_map %p %06x\n", vha, key);
7162                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7163                 if (slot)
7164                         btree_remove32(&vha->hw->tgt.host_map, key);
7165                 vha->d_id.b24 = 0;
7166                 break;
7167         }
7168 }
7169
7170 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7171 {
7172
7173         if (!vha->d_id.b24) {
7174                 vha->d_id = id;
7175                 qlt_update_vp_map(vha, SET_AL_PA);
7176         } else if (vha->d_id.b24 != id.b24) {
7177                 qlt_update_vp_map(vha, RESET_AL_PA);
7178                 vha->d_id = id;
7179                 qlt_update_vp_map(vha, SET_AL_PA);
7180         }
7181 }
7182
7183 static int __init qlt_parse_ini_mode(void)
7184 {
7185         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7186                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7187         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7188                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7189         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7190                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7191         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7192                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7193         else
7194                 return false;
7195
7196         return true;
7197 }
7198
7199 int __init qlt_init(void)
7200 {
7201         int ret;
7202
7203         if (!qlt_parse_ini_mode()) {
7204                 ql_log(ql_log_fatal, NULL, 0xe06b,
7205                     "qlt_parse_ini_mode() failed\n");
7206                 return -EINVAL;
7207         }
7208
7209         if (!QLA_TGT_MODE_ENABLED())
7210                 return 0;
7211
7212         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7213             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7214             qla_tgt_mgmt_cmd), 0, NULL);
7215         if (!qla_tgt_mgmt_cmd_cachep) {
7216                 ql_log(ql_log_fatal, NULL, 0xd04b,
7217                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7218                 return -ENOMEM;
7219         }
7220
7221         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7222             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7223             0, NULL);
7224
7225         if (!qla_tgt_plogi_cachep) {
7226                 ql_log(ql_log_fatal, NULL, 0xe06d,
7227                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7228                 ret = -ENOMEM;
7229                 goto out_mgmt_cmd_cachep;
7230         }
7231
7232         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7233             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7234         if (!qla_tgt_mgmt_cmd_mempool) {
7235                 ql_log(ql_log_fatal, NULL, 0xe06e,
7236                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7237                 ret = -ENOMEM;
7238                 goto out_plogi_cachep;
7239         }
7240
7241         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7242         if (!qla_tgt_wq) {
7243                 ql_log(ql_log_fatal, NULL, 0xe06f,
7244                     "alloc_workqueue for qla_tgt_wq failed\n");
7245                 ret = -ENOMEM;
7246                 goto out_cmd_mempool;
7247         }
7248         /*
7249          * Return 1 to signal that initiator-mode is being disabled
7250          */
7251         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7252
7253 out_cmd_mempool:
7254         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7255 out_plogi_cachep:
7256         kmem_cache_destroy(qla_tgt_plogi_cachep);
7257 out_mgmt_cmd_cachep:
7258         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7259         return ret;
7260 }
7261
7262 void qlt_exit(void)
7263 {
7264         if (!QLA_TGT_MODE_ENABLED())
7265                 return;
7266
7267         destroy_workqueue(qla_tgt_wq);
7268         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7269         kmem_cache_destroy(qla_tgt_plogi_cachep);
7270         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7271 }