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         struct qla_hw_data *ha = sess->vha->hw;
1228         unsigned long flags;
1229
1230         if (sess->disc_state == DSC_DELETE_PEND)
1231                 return;
1232
1233         if (sess->disc_state == DSC_DELETED) {
1234                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1235                         wake_up_all(&tgt->waitQ);
1236                 if (sess->vha->fcport_count == 0)
1237                         wake_up_all(&sess->vha->fcport_waitQ);
1238
1239                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1240                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1241                         return;
1242         }
1243
1244         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1245         if (sess->deleted == QLA_SESS_DELETED)
1246                 sess->logout_on_delete = 0;
1247
1248         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1249                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1250                 return;
1251         }
1252         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1253         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1254
1255         sess->disc_state = DSC_DELETE_PEND;
1256
1257         qla24xx_chk_fcp_state(sess);
1258
1259         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1260             "Scheduling sess %p for deletion\n", sess);
1261
1262         INIT_WORK(&sess->del_work, qla24xx_delete_sess_fn);
1263         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1264 }
1265
1266 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1267 {
1268         struct fc_port *sess;
1269         scsi_qla_host_t *vha = tgt->vha;
1270
1271         list_for_each_entry(sess, &vha->vp_fcports, list) {
1272                 if (sess->se_sess)
1273                         qlt_schedule_sess_for_deletion(sess);
1274         }
1275
1276         /* At this point tgt could be already dead */
1277 }
1278
1279 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1280         uint16_t *loop_id)
1281 {
1282         struct qla_hw_data *ha = vha->hw;
1283         dma_addr_t gid_list_dma;
1284         struct gid_list_info *gid_list;
1285         char *id_iter;
1286         int res, rc, i;
1287         uint16_t entries;
1288
1289         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1290             &gid_list_dma, GFP_KERNEL);
1291         if (!gid_list) {
1292                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1293                     "qla_target(%d): DMA Alloc failed of %u\n",
1294                     vha->vp_idx, qla2x00_gid_list_size(ha));
1295                 return -ENOMEM;
1296         }
1297
1298         /* Get list of logged in devices */
1299         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1300         if (rc != QLA_SUCCESS) {
1301                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1302                     "qla_target(%d): get_id_list() failed: %x\n",
1303                     vha->vp_idx, rc);
1304                 res = -EBUSY;
1305                 goto out_free_id_list;
1306         }
1307
1308         id_iter = (char *)gid_list;
1309         res = -ENOENT;
1310         for (i = 0; i < entries; i++) {
1311                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1312                 if ((gid->al_pa == s_id[2]) &&
1313                     (gid->area == s_id[1]) &&
1314                     (gid->domain == s_id[0])) {
1315                         *loop_id = le16_to_cpu(gid->loop_id);
1316                         res = 0;
1317                         break;
1318                 }
1319                 id_iter += ha->gid_list_info_size;
1320         }
1321
1322 out_free_id_list:
1323         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1324             gid_list, gid_list_dma);
1325         return res;
1326 }
1327
1328 /*
1329  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1330  * Caller must put it.
1331  */
1332 static struct fc_port *qlt_create_sess(
1333         struct scsi_qla_host *vha,
1334         fc_port_t *fcport,
1335         bool local)
1336 {
1337         struct qla_hw_data *ha = vha->hw;
1338         struct fc_port *sess = fcport;
1339         unsigned long flags;
1340
1341         if (vha->vha_tgt.qla_tgt->tgt_stop)
1342                 return NULL;
1343
1344         if (fcport->se_sess) {
1345                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1346                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1347                             "%s: kref_get_unless_zero failed for %8phC\n",
1348                             __func__, sess->port_name);
1349                         return NULL;
1350                 }
1351                 return fcport;
1352         }
1353         sess->tgt = vha->vha_tgt.qla_tgt;
1354         sess->local = local;
1355
1356         /*
1357          * Under normal circumstances we want to logout from firmware when
1358          * session eventually ends and release corresponding nport handle.
1359          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1360          * code will adjust these flags as necessary.
1361          */
1362         sess->logout_on_delete = 1;
1363         sess->keep_nport_handle = 0;
1364         sess->logout_completed = 0;
1365
1366         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1367             &fcport->port_name[0], sess) < 0) {
1368                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1369                     "(%d) %8phC check_initiator_node_acl failed\n",
1370                     vha->vp_idx, fcport->port_name);
1371                 return NULL;
1372         } else {
1373                 kref_init(&fcport->sess_kref);
1374                 /*
1375                  * Take an extra reference to ->sess_kref here to handle
1376                  * fc_port access across ->tgt.sess_lock reaquire.
1377                  */
1378                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1379                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1380                             "%s: kref_get_unless_zero failed for %8phC\n",
1381                             __func__, sess->port_name);
1382                         return NULL;
1383                 }
1384
1385                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1386                 if (!IS_SW_RESV_ADDR(sess->d_id))
1387                         vha->vha_tgt.qla_tgt->sess_count++;
1388
1389                 qlt_do_generation_tick(vha, &sess->generation);
1390                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1391         }
1392
1393         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1394             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1395             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1396             vha->vha_tgt.qla_tgt->sess_count);
1397
1398         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1399             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1400             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1401             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1402             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1403             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1404
1405         return sess;
1406 }
1407
1408 /*
1409  * max_gen - specifies maximum session generation
1410  * at which this deletion requestion is still valid
1411  */
1412 void
1413 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1414 {
1415         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1416         struct fc_port *sess = fcport;
1417         unsigned long flags;
1418
1419         if (!vha->hw->tgt.tgt_ops)
1420                 return;
1421
1422         if (!tgt)
1423                 return;
1424
1425         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1426         if (tgt->tgt_stop) {
1427                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1428                 return;
1429         }
1430         if (!sess->se_sess) {
1431                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1432                 return;
1433         }
1434
1435         if (max_gen - sess->generation < 0) {
1436                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1437                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1438                     "Ignoring stale deletion request for se_sess %p / sess %p"
1439                     " for port %8phC, req_gen %d, sess_gen %d\n",
1440                     sess->se_sess, sess, sess->port_name, max_gen,
1441                     sess->generation);
1442                 return;
1443         }
1444
1445         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1446
1447         sess->local = 1;
1448         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1449         qlt_schedule_sess_for_deletion(sess);
1450 }
1451
1452 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1453 {
1454         struct qla_hw_data *ha = tgt->ha;
1455         unsigned long flags;
1456         int res;
1457         /*
1458          * We need to protect against race, when tgt is freed before or
1459          * inside wake_up()
1460          */
1461         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1462         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1463             "tgt %p, sess_count=%d\n",
1464             tgt, tgt->sess_count);
1465         res = (tgt->sess_count == 0);
1466         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1467
1468         return res;
1469 }
1470
1471 /* Called by tcm_qla2xxx configfs code */
1472 int qlt_stop_phase1(struct qla_tgt *tgt)
1473 {
1474         struct scsi_qla_host *vha = tgt->vha;
1475         struct qla_hw_data *ha = tgt->ha;
1476         unsigned long flags;
1477
1478         mutex_lock(&qla_tgt_mutex);
1479         if (!vha->fc_vport) {
1480                 struct Scsi_Host *sh = vha->host;
1481                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1482                 bool npiv_vports;
1483
1484                 spin_lock_irqsave(sh->host_lock, flags);
1485                 npiv_vports = (fc_host->npiv_vports_inuse);
1486                 spin_unlock_irqrestore(sh->host_lock, flags);
1487
1488                 if (npiv_vports) {
1489                         mutex_unlock(&qla_tgt_mutex);
1490                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
1491                             "NPIV is in use. Can not stop target\n");
1492                         return -EPERM;
1493                 }
1494         }
1495         if (tgt->tgt_stop || tgt->tgt_stopped) {
1496                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1497                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1498                 mutex_unlock(&qla_tgt_mutex);
1499                 return -EPERM;
1500         }
1501
1502         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1503             vha->host_no, vha);
1504         /*
1505          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1506          * Lock is needed, because we still can get an incoming packet.
1507          */
1508         mutex_lock(&vha->vha_tgt.tgt_mutex);
1509         tgt->tgt_stop = 1;
1510         qlt_clear_tgt_db(tgt);
1511         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1512         mutex_unlock(&qla_tgt_mutex);
1513
1514         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1515             "Waiting for sess works (tgt %p)", tgt);
1516         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1517         while (!list_empty(&tgt->sess_works_list)) {
1518                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1519                 flush_scheduled_work();
1520                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1521         }
1522         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1523
1524         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1525             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1526
1527         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1528
1529         /* Big hammer */
1530         if (!ha->flags.host_shutting_down &&
1531             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1532                 qlt_disable_vha(vha);
1533
1534         /* Wait for sessions to clear out (just in case) */
1535         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1536         return 0;
1537 }
1538 EXPORT_SYMBOL(qlt_stop_phase1);
1539
1540 /* Called by tcm_qla2xxx configfs code */
1541 void qlt_stop_phase2(struct qla_tgt *tgt)
1542 {
1543         scsi_qla_host_t *vha = tgt->vha;
1544
1545         if (tgt->tgt_stopped) {
1546                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1547                     "Already in tgt->tgt_stopped state\n");
1548                 dump_stack();
1549                 return;
1550         }
1551         if (!tgt->tgt_stop) {
1552                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1553                     "%s: phase1 stop is not completed\n", __func__);
1554                 dump_stack();
1555                 return;
1556         }
1557
1558         mutex_lock(&vha->vha_tgt.tgt_mutex);
1559         tgt->tgt_stop = 0;
1560         tgt->tgt_stopped = 1;
1561         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1562
1563         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1564             tgt);
1565 }
1566 EXPORT_SYMBOL(qlt_stop_phase2);
1567
1568 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1569 static void qlt_release(struct qla_tgt *tgt)
1570 {
1571         scsi_qla_host_t *vha = tgt->vha;
1572         void *node;
1573         u64 key = 0;
1574         u16 i;
1575         struct qla_qpair_hint *h;
1576         struct qla_hw_data *ha = vha->hw;
1577
1578         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
1579             !tgt->tgt_stopped)
1580                 qlt_stop_phase1(tgt);
1581
1582         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1583                 qlt_stop_phase2(tgt);
1584
1585         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1586                 unsigned long flags;
1587
1588                 h = &tgt->qphints[i];
1589                 if (h->qpair) {
1590                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1591                         list_del(&h->hint_elem);
1592                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1593                         h->qpair = NULL;
1594                 }
1595         }
1596         kfree(tgt->qphints);
1597         mutex_lock(&qla_tgt_mutex);
1598         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1599         mutex_unlock(&qla_tgt_mutex);
1600
1601         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1602                 btree_remove64(&tgt->lun_qpair_map, key);
1603
1604         btree_destroy64(&tgt->lun_qpair_map);
1605
1606         if (vha->vp_idx)
1607                 if (ha->tgt.tgt_ops &&
1608                     ha->tgt.tgt_ops->remove_target &&
1609                     vha->vha_tgt.target_lport_ptr)
1610                         ha->tgt.tgt_ops->remove_target(vha);
1611
1612         vha->vha_tgt.qla_tgt = NULL;
1613
1614         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1615             "Release of tgt %p finished\n", tgt);
1616
1617         kfree(tgt);
1618 }
1619
1620 /* ha->hardware_lock supposed to be held on entry */
1621 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1622         const void *param, unsigned int param_size)
1623 {
1624         struct qla_tgt_sess_work_param *prm;
1625         unsigned long flags;
1626
1627         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1628         if (!prm) {
1629                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1630                     "qla_target(%d): Unable to create session "
1631                     "work, command will be refused", 0);
1632                 return -ENOMEM;
1633         }
1634
1635         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1636             "Scheduling work (type %d, prm %p)"
1637             " to find session for param %p (size %d, tgt %p)\n",
1638             type, prm, param, param_size, tgt);
1639
1640         prm->type = type;
1641         memcpy(&prm->tm_iocb, param, param_size);
1642
1643         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1644         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1645         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1646
1647         schedule_work(&tgt->sess_work);
1648
1649         return 0;
1650 }
1651
1652 /*
1653  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1654  */
1655 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1656         struct imm_ntfy_from_isp *ntfy,
1657         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1658         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1659 {
1660         struct scsi_qla_host *vha = qpair->vha;
1661         struct qla_hw_data *ha = vha->hw;
1662         request_t *pkt;
1663         struct nack_to_isp *nack;
1664
1665         if (!ha->flags.fw_started)
1666                 return;
1667
1668         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1669
1670         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1671         if (!pkt) {
1672                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1673                     "qla_target(%d): %s failed: unable to allocate "
1674                     "request packet\n", vha->vp_idx, __func__);
1675                 return;
1676         }
1677
1678         if (vha->vha_tgt.qla_tgt != NULL)
1679                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1680
1681         pkt->entry_type = NOTIFY_ACK_TYPE;
1682         pkt->entry_count = 1;
1683
1684         nack = (struct nack_to_isp *)pkt;
1685         nack->ox_id = ntfy->ox_id;
1686
1687         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1688         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1689         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1690                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1691                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1692         }
1693         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1694         nack->u.isp24.status = ntfy->u.isp24.status;
1695         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1696         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1697         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1698         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1699         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1700         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1701         nack->u.isp24.srr_reject_code = srr_reject_code;
1702         nack->u.isp24.srr_reject_code_expl = srr_explan;
1703         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1704
1705         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1706             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1707             vha->vp_idx, nack->u.isp24.status);
1708
1709         /* Memory Barrier */
1710         wmb();
1711         qla2x00_start_iocbs(vha, qpair->req);
1712 }
1713
1714 /*
1715  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1716  */
1717 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1718         struct abts_recv_from_24xx *abts, uint32_t status,
1719         bool ids_reversed)
1720 {
1721         struct scsi_qla_host *vha = qpair->vha;
1722         struct qla_hw_data *ha = vha->hw;
1723         struct abts_resp_to_24xx *resp;
1724         uint32_t f_ctl;
1725         uint8_t *p;
1726
1727         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1728             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1729             ha, abts, status);
1730
1731         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1732             NULL);
1733         if (!resp) {
1734                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1735                     "qla_target(%d): %s failed: unable to allocate "
1736                     "request packet", vha->vp_idx, __func__);
1737                 return;
1738         }
1739
1740         resp->entry_type = ABTS_RESP_24XX;
1741         resp->entry_count = 1;
1742         resp->nport_handle = abts->nport_handle;
1743         resp->vp_index = vha->vp_idx;
1744         resp->sof_type = abts->sof_type;
1745         resp->exchange_address = abts->exchange_address;
1746         resp->fcp_hdr_le = abts->fcp_hdr_le;
1747         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1748             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1749             F_CTL_SEQ_INITIATIVE);
1750         p = (uint8_t *)&f_ctl;
1751         resp->fcp_hdr_le.f_ctl[0] = *p++;
1752         resp->fcp_hdr_le.f_ctl[1] = *p++;
1753         resp->fcp_hdr_le.f_ctl[2] = *p;
1754         if (ids_reversed) {
1755                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1756                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1757                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1758                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1759                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1760                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1761         } else {
1762                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1763                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1764                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1765                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1766                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1767                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1768         }
1769         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1770         if (status == FCP_TMF_CMPL) {
1771                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1772                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1773                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1774                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1775                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1776                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1777         } else {
1778                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1779                 resp->payload.ba_rjt.reason_code =
1780                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1781                 /* Other bytes are zero */
1782         }
1783
1784         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1785
1786         /* Memory Barrier */
1787         wmb();
1788         if (qpair->reqq_start_iocbs)
1789                 qpair->reqq_start_iocbs(qpair);
1790         else
1791                 qla2x00_start_iocbs(vha, qpair->req);
1792 }
1793
1794 /*
1795  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1796  */
1797 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1798         struct abts_resp_from_24xx_fw *entry)
1799 {
1800         struct ctio7_to_24xx *ctio;
1801
1802         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1803             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1804
1805         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(
1806             vha->hw->base_qpair, NULL);
1807         if (ctio == NULL) {
1808                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1809                     "qla_target(%d): %s failed: unable to allocate "
1810                     "request packet\n", vha->vp_idx, __func__);
1811                 return;
1812         }
1813
1814         /*
1815          * We've got on entrance firmware's response on by us generated
1816          * ABTS response. So, in it ID fields are reversed.
1817          */
1818
1819         ctio->entry_type = CTIO_TYPE7;
1820         ctio->entry_count = 1;
1821         ctio->nport_handle = entry->nport_handle;
1822         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1823         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1824         ctio->vp_index = vha->vp_idx;
1825         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1826         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1827         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1828         ctio->exchange_addr = entry->exchange_addr_to_abort;
1829         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1830                                             CTIO7_FLAGS_TERMINATE);
1831         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1832
1833         /* Memory Barrier */
1834         wmb();
1835         qla2x00_start_iocbs(vha, vha->req);
1836
1837         qlt_24xx_send_abts_resp(vha->hw->base_qpair,
1838             (struct abts_recv_from_24xx *)entry,
1839             FCP_TMF_CMPL, true);
1840 }
1841
1842 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1843 {
1844         struct qla_tgt_sess_op *op;
1845         struct qla_tgt_cmd *cmd;
1846         unsigned long flags;
1847
1848         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1849         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1850                 if (tag == op->atio.u.isp24.exchange_addr) {
1851                         op->aborted = true;
1852                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1853                         return 1;
1854                 }
1855         }
1856
1857         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1858                 if (tag == op->atio.u.isp24.exchange_addr) {
1859                         op->aborted = true;
1860                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1861                         return 1;
1862                 }
1863         }
1864
1865         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1866                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1867                         cmd->aborted = 1;
1868                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1869                         return 1;
1870                 }
1871         }
1872         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1873
1874         return 0;
1875 }
1876
1877 /* drop cmds for the given lun
1878  * XXX only looks for cmds on the port through which lun reset was recieved
1879  * XXX does not go through the list of other port (which may have cmds
1880  *     for the same lun)
1881  */
1882 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1883                                 u64 lun, uint8_t *s_id)
1884 {
1885         struct qla_tgt_sess_op *op;
1886         struct qla_tgt_cmd *cmd;
1887         uint32_t key;
1888         unsigned long flags;
1889
1890         key = sid_to_key(s_id);
1891         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1892         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1893                 uint32_t op_key;
1894                 u64 op_lun;
1895
1896                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1897                 op_lun = scsilun_to_int(
1898                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1899                 if (op_key == key && op_lun == lun)
1900                         op->aborted = true;
1901         }
1902
1903         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1904                 uint32_t op_key;
1905                 u64 op_lun;
1906
1907                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1908                 op_lun = scsilun_to_int(
1909                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1910                 if (op_key == key && op_lun == lun)
1911                         op->aborted = true;
1912         }
1913
1914         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1915                 uint32_t cmd_key;
1916                 u64 cmd_lun;
1917
1918                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1919                 cmd_lun = scsilun_to_int(
1920                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1921                 if (cmd_key == key && cmd_lun == lun)
1922                         cmd->aborted = 1;
1923         }
1924         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1925 }
1926
1927 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
1928     uint64_t unpacked_lun)
1929 {
1930         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1931         struct qla_qpair_hint *h = NULL;
1932
1933         if (vha->flags.qpairs_available) {
1934                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
1935                 if (!h)
1936                         h = &tgt->qphints[0];
1937         } else {
1938                 h = &tgt->qphints[0];
1939         }
1940
1941         return h;
1942 }
1943
1944 static void qlt_do_tmr_work(struct work_struct *work)
1945 {
1946         struct qla_tgt_mgmt_cmd *mcmd =
1947                 container_of(work, struct qla_tgt_mgmt_cmd, work);
1948         struct qla_hw_data *ha = mcmd->vha->hw;
1949         int rc = EIO;
1950         uint32_t tag;
1951         unsigned long flags;
1952
1953         switch (mcmd->tmr_func) {
1954         case QLA_TGT_ABTS:
1955                 tag = mcmd->orig_iocb.abts.exchange_addr_to_abort;
1956                 break;
1957         default:
1958                 tag = 0;
1959                 break;
1960         }
1961
1962         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
1963             mcmd->tmr_func, tag);
1964
1965         if (rc != 0) {
1966                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
1967                 switch (mcmd->tmr_func) {
1968                 case QLA_TGT_ABTS:
1969                         qlt_24xx_send_abts_resp(mcmd->qpair,
1970                             &mcmd->orig_iocb.abts,
1971                             FCP_TMF_REJECTED, false);
1972                         break;
1973                 case QLA_TGT_LUN_RESET:
1974                 case QLA_TGT_CLEAR_TS:
1975                 case QLA_TGT_ABORT_TS:
1976                 case QLA_TGT_CLEAR_ACA:
1977                 case QLA_TGT_TARGET_RESET:
1978                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
1979                             qla_sam_status);
1980                         break;
1981
1982                 case QLA_TGT_ABORT_ALL:
1983                 case QLA_TGT_NEXUS_LOSS_SESS:
1984                 case QLA_TGT_NEXUS_LOSS:
1985                         qlt_send_notify_ack(mcmd->qpair,
1986                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
1987                         break;
1988                 }
1989                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
1990
1991                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
1992                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
1993                     mcmd->vha->vp_idx, rc);
1994                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1995         }
1996 }
1997
1998 /* ha->hardware_lock supposed to be held on entry */
1999 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2000         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2001 {
2002         struct qla_hw_data *ha = vha->hw;
2003         struct qla_tgt_mgmt_cmd *mcmd;
2004         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2005
2006         if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
2007                 /* send TASK_ABORT response immediately */
2008                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false);
2009                 return 0;
2010         }
2011
2012         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2013             "qla_target(%d): task abort (tag=%d)\n",
2014             vha->vp_idx, abts->exchange_addr_to_abort);
2015
2016         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2017         if (mcmd == NULL) {
2018                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2019                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2020                     vha->vp_idx, __func__);
2021                 return -ENOMEM;
2022         }
2023         memset(mcmd, 0, sizeof(*mcmd));
2024
2025         mcmd->sess = sess;
2026         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2027         mcmd->reset_count = ha->base_qpair->chip_reset;
2028         mcmd->tmr_func = QLA_TGT_ABTS;
2029         mcmd->qpair = h->qpair;
2030         mcmd->vha = vha;
2031
2032         /*
2033          * LUN is looked up by target-core internally based on the passed
2034          * abts->exchange_addr_to_abort tag.
2035          */
2036         mcmd->se_cmd.cpuid = h->cpuid;
2037
2038         if (ha->tgt.tgt_ops->find_cmd_by_tag) {
2039                 struct qla_tgt_cmd *abort_cmd;
2040
2041                 abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2042                     abts->exchange_addr_to_abort);
2043                 if (abort_cmd && abort_cmd->qpair) {
2044                         mcmd->qpair = abort_cmd->qpair;
2045                         mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2046                 }
2047         }
2048
2049         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2050         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2051
2052         return 0;
2053 }
2054
2055 /*
2056  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2057  */
2058 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2059         struct abts_recv_from_24xx *abts)
2060 {
2061         struct qla_hw_data *ha = vha->hw;
2062         struct fc_port *sess;
2063         uint32_t tag = abts->exchange_addr_to_abort;
2064         uint8_t s_id[3];
2065         int rc;
2066         unsigned long flags;
2067
2068         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2069                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2070                     "qla_target(%d): ABTS: Abort Sequence not "
2071                     "supported\n", vha->vp_idx);
2072                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2073                     false);
2074                 return;
2075         }
2076
2077         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2078                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2079                     "qla_target(%d): ABTS: Unknown Exchange "
2080                     "Address received\n", vha->vp_idx);
2081                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2082                     false);
2083                 return;
2084         }
2085
2086         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2087             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2088             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
2089             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
2090             le32_to_cpu(abts->fcp_hdr_le.parameter));
2091
2092         s_id[0] = abts->fcp_hdr_le.s_id[2];
2093         s_id[1] = abts->fcp_hdr_le.s_id[1];
2094         s_id[2] = abts->fcp_hdr_le.s_id[0];
2095
2096         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2097         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2098         if (!sess) {
2099                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2100                     "qla_target(%d): task abort for non-existent session\n",
2101                     vha->vp_idx);
2102                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2103
2104                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2105                             false);
2106                 return;
2107         }
2108         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2109
2110
2111         if (sess->deleted) {
2112                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2113                     false);
2114                 return;
2115         }
2116
2117         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2118         if (rc != 0) {
2119                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2120                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2121                     vha->vp_idx, rc);
2122                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2123                     false);
2124                 return;
2125         }
2126 }
2127
2128 /*
2129  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2130  */
2131 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2132         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2133 {
2134         struct scsi_qla_host *ha = mcmd->vha;
2135         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2136         struct ctio7_to_24xx *ctio;
2137         uint16_t temp;
2138
2139         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2140             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2141             ha, atio, resp_code);
2142
2143
2144         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2145         if (ctio == NULL) {
2146                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2147                     "qla_target(%d): %s failed: unable to allocate "
2148                     "request packet\n", ha->vp_idx, __func__);
2149                 return;
2150         }
2151
2152         ctio->entry_type = CTIO_TYPE7;
2153         ctio->entry_count = 1;
2154         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2155         ctio->nport_handle = mcmd->sess->loop_id;
2156         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2157         ctio->vp_index = ha->vp_idx;
2158         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2159         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2160         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2161         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2162         temp = (atio->u.isp24.attr << 9)|
2163                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2164         ctio->u.status1.flags = cpu_to_le16(temp);
2165         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2166         ctio->u.status1.ox_id = cpu_to_le16(temp);
2167         ctio->u.status1.scsi_status =
2168             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2169         ctio->u.status1.response_len = cpu_to_le16(8);
2170         ctio->u.status1.sense_data[0] = resp_code;
2171
2172         /* Memory Barrier */
2173         wmb();
2174         if (qpair->reqq_start_iocbs)
2175                 qpair->reqq_start_iocbs(qpair);
2176         else
2177                 qla2x00_start_iocbs(ha, qpair->req);
2178 }
2179
2180 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2181 {
2182         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2183 }
2184 EXPORT_SYMBOL(qlt_free_mcmd);
2185
2186 /*
2187  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2188  * reacquire
2189  */
2190 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2191     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2192 {
2193         struct atio_from_isp *atio = &cmd->atio;
2194         struct ctio7_to_24xx *ctio;
2195         uint16_t temp;
2196         struct scsi_qla_host *vha = cmd->vha;
2197
2198         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2199             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2200             "sense_key=%02x, asc=%02x, ascq=%02x",
2201             vha, atio, scsi_status, sense_key, asc, ascq);
2202
2203         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2204         if (!ctio) {
2205                 ql_dbg(ql_dbg_async, vha, 0x3067,
2206                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2207                     vha->host_no, __func__);
2208                 goto out;
2209         }
2210
2211         ctio->entry_type = CTIO_TYPE7;
2212         ctio->entry_count = 1;
2213         ctio->handle = QLA_TGT_SKIP_HANDLE;
2214         ctio->nport_handle = cmd->sess->loop_id;
2215         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2216         ctio->vp_index = vha->vp_idx;
2217         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2218         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2219         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2220         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2221         temp = (atio->u.isp24.attr << 9) |
2222             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2223         ctio->u.status1.flags = cpu_to_le16(temp);
2224         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2225         ctio->u.status1.ox_id = cpu_to_le16(temp);
2226         ctio->u.status1.scsi_status =
2227             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2228         ctio->u.status1.response_len = cpu_to_le16(18);
2229         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2230
2231         if (ctio->u.status1.residual != 0)
2232                 ctio->u.status1.scsi_status |=
2233                     cpu_to_le16(SS_RESIDUAL_UNDER);
2234
2235         /* Response code and sense key */
2236         put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
2237             (&ctio->u.status1.sense_data)[0]);
2238         /* Additional sense length */
2239         put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
2240         /* ASC and ASCQ */
2241         put_unaligned_le32(((asc << 24) | (ascq << 16)),
2242             (&ctio->u.status1.sense_data)[3]);
2243
2244         /* Memory Barrier */
2245         wmb();
2246
2247         if (qpair->reqq_start_iocbs)
2248                 qpair->reqq_start_iocbs(qpair);
2249         else
2250                 qla2x00_start_iocbs(vha, qpair->req);
2251
2252 out:
2253         return;
2254 }
2255
2256 /* callback from target fabric module code */
2257 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2258 {
2259         struct scsi_qla_host *vha = mcmd->sess->vha;
2260         struct qla_hw_data *ha = vha->hw;
2261         unsigned long flags;
2262         struct qla_qpair *qpair = mcmd->qpair;
2263
2264         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2265             "TM response mcmd (%p) status %#x state %#x",
2266             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2267
2268         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2269
2270         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2271                 /*
2272                  * Either the port is not online or this request was from
2273                  * previous life, just abort the processing.
2274                  */
2275                 ql_dbg(ql_dbg_async, vha, 0xe100,
2276                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2277                         vha->flags.online, qla2x00_reset_active(vha),
2278                         mcmd->reset_count, qpair->chip_reset);
2279                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2280                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2281                 return;
2282         }
2283
2284         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2285                 if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2286                     ELS_LOGO ||
2287                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2288                     ELS_PRLO ||
2289                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2290                     ELS_TPRLO) {
2291                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2292                             "TM response logo %phC status %#x state %#x",
2293                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2294                             mcmd->flags);
2295                         qlt_schedule_sess_for_deletion(mcmd->sess);
2296                 } else {
2297                         qlt_send_notify_ack(vha->hw->base_qpair,
2298                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2299                 }
2300         } else {
2301                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2302                         qlt_24xx_send_abts_resp(qpair, &mcmd->orig_iocb.abts,
2303                             mcmd->fc_tm_rsp, false);
2304                 else
2305                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2306                             mcmd->fc_tm_rsp);
2307         }
2308         /*
2309          * Make the callback for ->free_mcmd() to queue_work() and invoke
2310          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2311          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2312          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2313          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2314          * qlt_xmit_tm_rsp() returns here..
2315          */
2316         ha->tgt.tgt_ops->free_mcmd(mcmd);
2317         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2318 }
2319 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2320
2321 /* No locks */
2322 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2323 {
2324         struct qla_tgt_cmd *cmd = prm->cmd;
2325
2326         BUG_ON(cmd->sg_cnt == 0);
2327
2328         prm->sg = (struct scatterlist *)cmd->sg;
2329         prm->seg_cnt = pci_map_sg(cmd->qpair->pdev, cmd->sg,
2330             cmd->sg_cnt, cmd->dma_data_direction);
2331         if (unlikely(prm->seg_cnt == 0))
2332                 goto out_err;
2333
2334         prm->cmd->sg_mapped = 1;
2335
2336         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2337                 /*
2338                  * If greater than four sg entries then we need to allocate
2339                  * the continuation entries
2340                  */
2341                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2342                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2343                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2344                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2345         } else {
2346                 /* DIF */
2347                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2348                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2349                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2350                         prm->tot_dsds = prm->seg_cnt;
2351                 } else
2352                         prm->tot_dsds = prm->seg_cnt;
2353
2354                 if (cmd->prot_sg_cnt) {
2355                         prm->prot_sg      = cmd->prot_sg;
2356                         prm->prot_seg_cnt = pci_map_sg(cmd->qpair->pdev,
2357                                 cmd->prot_sg, cmd->prot_sg_cnt,
2358                                 cmd->dma_data_direction);
2359                         if (unlikely(prm->prot_seg_cnt == 0))
2360                                 goto out_err;
2361
2362                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2363                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2364                                 /* Dif Bundling not support here */
2365                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2366                                                                 cmd->blk_sz);
2367                                 prm->tot_dsds += prm->prot_seg_cnt;
2368                         } else
2369                                 prm->tot_dsds += prm->prot_seg_cnt;
2370                 }
2371         }
2372
2373         return 0;
2374
2375 out_err:
2376         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2377             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2378             0, prm->cmd->sg_cnt);
2379         return -1;
2380 }
2381
2382 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2383 {
2384         struct qla_hw_data *ha;
2385         struct qla_qpair *qpair;
2386         if (!cmd->sg_mapped)
2387                 return;
2388
2389         qpair = cmd->qpair;
2390
2391         pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt,
2392             cmd->dma_data_direction);
2393         cmd->sg_mapped = 0;
2394
2395         if (cmd->prot_sg_cnt)
2396                 pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2397                         cmd->dma_data_direction);
2398
2399         if (!cmd->ctx)
2400                 return;
2401         ha = vha->hw;
2402         if (cmd->ctx_dsd_alloced)
2403                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2404
2405         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2406 }
2407
2408 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2409         uint32_t req_cnt)
2410 {
2411         uint32_t cnt;
2412         struct req_que *req = qpair->req;
2413
2414         if (req->cnt < (req_cnt + 2)) {
2415                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2416                     RD_REG_DWORD_RELAXED(req->req_q_out));
2417
2418                 if  (req->ring_index < cnt)
2419                         req->cnt = cnt - req->ring_index;
2420                 else
2421                         req->cnt = req->length - (req->ring_index - cnt);
2422
2423                 if (unlikely(req->cnt < (req_cnt + 2)))
2424                         return -EAGAIN;
2425         }
2426
2427         req->cnt -= req_cnt;
2428
2429         return 0;
2430 }
2431
2432 /*
2433  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2434  */
2435 static inline void *qlt_get_req_pkt(struct req_que *req)
2436 {
2437         /* Adjust ring index. */
2438         req->ring_index++;
2439         if (req->ring_index == req->length) {
2440                 req->ring_index = 0;
2441                 req->ring_ptr = req->ring;
2442         } else {
2443                 req->ring_ptr++;
2444         }
2445         return (cont_entry_t *)req->ring_ptr;
2446 }
2447
2448 /* ha->hardware_lock supposed to be held on entry */
2449 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2450 {
2451         uint32_t h;
2452         int index;
2453         uint8_t found = 0;
2454         struct req_que *req = qpair->req;
2455
2456         h = req->current_outstanding_cmd;
2457
2458         for (index = 1; index < req->num_outstanding_cmds; index++) {
2459                 h++;
2460                 if (h == req->num_outstanding_cmds)
2461                         h = 1;
2462
2463                 if (h == QLA_TGT_SKIP_HANDLE)
2464                         continue;
2465
2466                 if (!req->outstanding_cmds[h]) {
2467                         found = 1;
2468                         break;
2469                 }
2470         }
2471
2472         if (found) {
2473                 req->current_outstanding_cmd = h;
2474         } else {
2475                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2476                     "qla_target(%d): Ran out of empty cmd slots\n",
2477                     qpair->vha->vp_idx);
2478                 h = QLA_TGT_NULL_HANDLE;
2479         }
2480
2481         return h;
2482 }
2483
2484 /* ha->hardware_lock supposed to be held on entry */
2485 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2486         struct qla_tgt_prm *prm)
2487 {
2488         uint32_t h;
2489         struct ctio7_to_24xx *pkt;
2490         struct atio_from_isp *atio = &prm->cmd->atio;
2491         uint16_t temp;
2492
2493         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2494         prm->pkt = pkt;
2495         memset(pkt, 0, sizeof(*pkt));
2496
2497         pkt->entry_type = CTIO_TYPE7;
2498         pkt->entry_count = (uint8_t)prm->req_cnt;
2499         pkt->vp_index = prm->cmd->vp_idx;
2500
2501         h = qlt_make_handle(qpair);
2502         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2503                 /*
2504                  * CTIO type 7 from the firmware doesn't provide a way to
2505                  * know the initiator's LOOP ID, hence we can't find
2506                  * the session and, so, the command.
2507                  */
2508                 return -EAGAIN;
2509         } else
2510                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2511
2512         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2513         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2514         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2515         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2516         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2517         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2518         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2519         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2520         temp = atio->u.isp24.attr << 9;
2521         pkt->u.status0.flags |= cpu_to_le16(temp);
2522         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2523         pkt->u.status0.ox_id = cpu_to_le16(temp);
2524         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2525
2526         return 0;
2527 }
2528
2529 /*
2530  * ha->hardware_lock supposed to be held on entry. We have already made sure
2531  * that there is sufficient amount of request entries to not drop it.
2532  */
2533 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2534 {
2535         int cnt;
2536         uint32_t *dword_ptr;
2537
2538         /* Build continuation packets */
2539         while (prm->seg_cnt > 0) {
2540                 cont_a64_entry_t *cont_pkt64 =
2541                         (cont_a64_entry_t *)qlt_get_req_pkt(
2542                            prm->cmd->qpair->req);
2543
2544                 /*
2545                  * Make sure that from cont_pkt64 none of
2546                  * 64-bit specific fields used for 32-bit
2547                  * addressing. Cast to (cont_entry_t *) for
2548                  * that.
2549                  */
2550
2551                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2552
2553                 cont_pkt64->entry_count = 1;
2554                 cont_pkt64->sys_define = 0;
2555
2556                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2557                 dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2558
2559                 /* Load continuation entry data segments */
2560                 for (cnt = 0;
2561                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2562                     cnt++, prm->seg_cnt--) {
2563                         *dword_ptr++ =
2564                             cpu_to_le32(pci_dma_lo32
2565                                 (sg_dma_address(prm->sg)));
2566                         *dword_ptr++ = cpu_to_le32(pci_dma_hi32
2567                             (sg_dma_address(prm->sg)));
2568                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2569
2570                         prm->sg = sg_next(prm->sg);
2571                 }
2572         }
2573 }
2574
2575 /*
2576  * ha->hardware_lock supposed to be held on entry. We have already made sure
2577  * that there is sufficient amount of request entries to not drop it.
2578  */
2579 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2580 {
2581         int cnt;
2582         uint32_t *dword_ptr;
2583         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2584
2585         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2586
2587         /* Setup packet address segment pointer */
2588         dword_ptr = pkt24->u.status0.dseg_0_address;
2589
2590         /* Set total data segment count */
2591         if (prm->seg_cnt)
2592                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2593
2594         if (prm->seg_cnt == 0) {
2595                 /* No data transfer */
2596                 *dword_ptr++ = 0;
2597                 *dword_ptr = 0;
2598                 return;
2599         }
2600
2601         /* If scatter gather */
2602
2603         /* Load command entry data segments */
2604         for (cnt = 0;
2605             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2606             cnt++, prm->seg_cnt--) {
2607                 *dword_ptr++ =
2608                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2609
2610                 *dword_ptr++ = cpu_to_le32(pci_dma_hi32(
2611                         sg_dma_address(prm->sg)));
2612
2613                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2614
2615                 prm->sg = sg_next(prm->sg);
2616         }
2617
2618         qlt_load_cont_data_segments(prm);
2619 }
2620
2621 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2622 {
2623         return cmd->bufflen > 0;
2624 }
2625
2626 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2627 {
2628         struct qla_tgt_cmd *cmd;
2629         struct scsi_qla_host *vha;
2630
2631         /* asc 0x10=dif error */
2632         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2633                 cmd = prm->cmd;
2634                 vha = cmd->vha;
2635                 /* ASCQ */
2636                 switch (prm->sense_buffer[13]) {
2637                 case 1:
2638                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2639                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2640                             "se_cmd=%p tag[%x]",
2641                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2642                             cmd->atio.u.isp24.exchange_addr);
2643                         break;
2644                 case 2:
2645                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2646                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2647                             "se_cmd=%p tag[%x]",
2648                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2649                             cmd->atio.u.isp24.exchange_addr);
2650                         break;
2651                 case 3:
2652                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2653                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2654                             "se_cmd=%p tag[%x]",
2655                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2656                             cmd->atio.u.isp24.exchange_addr);
2657                         break;
2658                 default:
2659                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2660                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2661                             "se_cmd=%p tag[%x]",
2662                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2663                             cmd->atio.u.isp24.exchange_addr);
2664                         break;
2665                 }
2666                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2667         }
2668 }
2669
2670 /*
2671  * Called without ha->hardware_lock held
2672  */
2673 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2674         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2675         uint32_t *full_req_cnt)
2676 {
2677         struct se_cmd *se_cmd = &cmd->se_cmd;
2678         struct qla_qpair *qpair = cmd->qpair;
2679
2680         prm->cmd = cmd;
2681         prm->tgt = cmd->tgt;
2682         prm->pkt = NULL;
2683         prm->rq_result = scsi_status;
2684         prm->sense_buffer = &cmd->sense_buffer[0];
2685         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2686         prm->sg = NULL;
2687         prm->seg_cnt = -1;
2688         prm->req_cnt = 1;
2689         prm->residual = 0;
2690         prm->add_status_pkt = 0;
2691         prm->prot_sg = NULL;
2692         prm->prot_seg_cnt = 0;
2693         prm->tot_dsds = 0;
2694
2695         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2696                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2697                         return -EAGAIN;
2698         }
2699
2700         *full_req_cnt = prm->req_cnt;
2701
2702         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2703                 prm->residual = se_cmd->residual_count;
2704                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2705                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2706                        prm->residual, se_cmd->tag,
2707                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2708                        cmd->bufflen, prm->rq_result);
2709                 prm->rq_result |= SS_RESIDUAL_UNDER;
2710         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2711                 prm->residual = se_cmd->residual_count;
2712                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2713                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2714                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2715                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2716                 prm->rq_result |= SS_RESIDUAL_OVER;
2717         }
2718
2719         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2720                 /*
2721                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2722                  * ignored in *xmit_response() below
2723                  */
2724                 if (qlt_has_data(cmd)) {
2725                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2726                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2727                             (prm->rq_result != 0))) {
2728                                 prm->add_status_pkt = 1;
2729                                 (*full_req_cnt)++;
2730                         }
2731                 }
2732         }
2733
2734         return 0;
2735 }
2736
2737 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2738     int sending_sense)
2739 {
2740         if (cmd->qpair->enable_class_2)
2741                 return 0;
2742
2743         if (sending_sense)
2744                 return cmd->conf_compl_supported;
2745         else
2746                 return cmd->qpair->enable_explicit_conf &&
2747                     cmd->conf_compl_supported;
2748 }
2749
2750 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2751         struct qla_tgt_prm *prm)
2752 {
2753         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2754             (uint32_t)sizeof(ctio->u.status1.sense_data));
2755         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2756         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2757                 ctio->u.status0.flags |= cpu_to_le16(
2758                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2759                     CTIO7_FLAGS_CONFORM_REQ);
2760         }
2761         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2762         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2763         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2764                 int i;
2765
2766                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2767                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2768                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2769                                     "Skipping EXPLICIT_CONFORM and "
2770                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2771                                     "non GOOD status\n");
2772                                 goto skip_explict_conf;
2773                         }
2774                         ctio->u.status1.flags |= cpu_to_le16(
2775                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2776                             CTIO7_FLAGS_CONFORM_REQ);
2777                 }
2778 skip_explict_conf:
2779                 ctio->u.status1.flags &=
2780                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2781                 ctio->u.status1.flags |=
2782                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2783                 ctio->u.status1.scsi_status |=
2784                     cpu_to_le16(SS_SENSE_LEN_VALID);
2785                 ctio->u.status1.sense_length =
2786                     cpu_to_le16(prm->sense_buffer_len);
2787                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2788                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2789                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2790
2791                 qlt_print_dif_err(prm);
2792
2793         } else {
2794                 ctio->u.status1.flags &=
2795                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2796                 ctio->u.status1.flags |=
2797                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2798                 ctio->u.status1.sense_length = 0;
2799                 memset(ctio->u.status1.sense_data, 0,
2800                     sizeof(ctio->u.status1.sense_data));
2801         }
2802
2803         /* Sense with len > 24, is it possible ??? */
2804 }
2805
2806 static inline int
2807 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2808 {
2809         switch (se_cmd->prot_op) {
2810         case TARGET_PROT_DOUT_INSERT:
2811         case TARGET_PROT_DIN_STRIP:
2812                 if (ql2xenablehba_err_chk >= 1)
2813                         return 1;
2814                 break;
2815         case TARGET_PROT_DOUT_PASS:
2816         case TARGET_PROT_DIN_PASS:
2817                 if (ql2xenablehba_err_chk >= 2)
2818                         return 1;
2819                 break;
2820         case TARGET_PROT_DIN_INSERT:
2821         case TARGET_PROT_DOUT_STRIP:
2822                 return 1;
2823         default:
2824                 break;
2825         }
2826         return 0;
2827 }
2828
2829 static inline int
2830 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2831 {
2832         switch (se_cmd->prot_op) {
2833         case TARGET_PROT_DIN_INSERT:
2834         case TARGET_PROT_DOUT_INSERT:
2835         case TARGET_PROT_DIN_STRIP:
2836         case TARGET_PROT_DOUT_STRIP:
2837         case TARGET_PROT_DIN_PASS:
2838         case TARGET_PROT_DOUT_PASS:
2839             return 1;
2840         default:
2841             return 0;
2842         }
2843         return 0;
2844 }
2845
2846 /*
2847  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2848  */
2849 static void
2850 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2851     uint16_t *pfw_prot_opts)
2852 {
2853         struct se_cmd *se_cmd = &cmd->se_cmd;
2854         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2855         scsi_qla_host_t *vha = cmd->tgt->vha;
2856         struct qla_hw_data *ha = vha->hw;
2857         uint32_t t32 = 0;
2858
2859         /*
2860          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2861          * have been immplemented by TCM, before AppTag is avail.
2862          * Look for modesense_handlers[]
2863          */
2864         ctx->app_tag = 0;
2865         ctx->app_tag_mask[0] = 0x0;
2866         ctx->app_tag_mask[1] = 0x0;
2867
2868         if (IS_PI_UNINIT_CAPABLE(ha)) {
2869                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2870                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2871                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2872                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2873                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2874         }
2875
2876         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2877
2878         switch (se_cmd->prot_type) {
2879         case TARGET_DIF_TYPE0_PROT:
2880                 /*
2881                  * No check for ql2xenablehba_err_chk, as it
2882                  * would be an I/O error if hba tag generation
2883                  * is not done.
2884                  */
2885                 ctx->ref_tag = cpu_to_le32(lba);
2886                 /* enable ALL bytes of the ref tag */
2887                 ctx->ref_tag_mask[0] = 0xff;
2888                 ctx->ref_tag_mask[1] = 0xff;
2889                 ctx->ref_tag_mask[2] = 0xff;
2890                 ctx->ref_tag_mask[3] = 0xff;
2891                 break;
2892         case TARGET_DIF_TYPE1_PROT:
2893             /*
2894              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2895              * REF tag, and 16 bit app tag.
2896              */
2897             ctx->ref_tag = cpu_to_le32(lba);
2898             if (!qla_tgt_ref_mask_check(se_cmd) ||
2899                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2900                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2901                     break;
2902             }
2903             /* enable ALL bytes of the ref tag */
2904             ctx->ref_tag_mask[0] = 0xff;
2905             ctx->ref_tag_mask[1] = 0xff;
2906             ctx->ref_tag_mask[2] = 0xff;
2907             ctx->ref_tag_mask[3] = 0xff;
2908             break;
2909         case TARGET_DIF_TYPE2_PROT:
2910             /*
2911              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2912              * tag has to match LBA in CDB + N
2913              */
2914             ctx->ref_tag = cpu_to_le32(lba);
2915             if (!qla_tgt_ref_mask_check(se_cmd) ||
2916                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2917                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2918                     break;
2919             }
2920             /* enable ALL bytes of the ref tag */
2921             ctx->ref_tag_mask[0] = 0xff;
2922             ctx->ref_tag_mask[1] = 0xff;
2923             ctx->ref_tag_mask[2] = 0xff;
2924             ctx->ref_tag_mask[3] = 0xff;
2925             break;
2926         case TARGET_DIF_TYPE3_PROT:
2927             /* For TYPE 3 protection: 16 bit GUARD only */
2928             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2929             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2930                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2931             break;
2932         }
2933 }
2934
2935 static inline int
2936 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2937 {
2938         uint32_t                *cur_dsd;
2939         uint32_t                transfer_length = 0;
2940         uint32_t                data_bytes;
2941         uint32_t                dif_bytes;
2942         uint8_t                 bundling = 1;
2943         struct crc_context      *crc_ctx_pkt = NULL;
2944         struct qla_hw_data      *ha;
2945         struct ctio_crc2_to_fw  *pkt;
2946         dma_addr_t              crc_ctx_dma;
2947         uint16_t                fw_prot_opts = 0;
2948         struct qla_tgt_cmd      *cmd = prm->cmd;
2949         struct se_cmd           *se_cmd = &cmd->se_cmd;
2950         uint32_t h;
2951         struct atio_from_isp *atio = &prm->cmd->atio;
2952         struct qla_tc_param     tc;
2953         uint16_t t16;
2954         scsi_qla_host_t *vha = cmd->vha;
2955
2956         ha = vha->hw;
2957
2958         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
2959         prm->pkt = pkt;
2960         memset(pkt, 0, sizeof(*pkt));
2961
2962         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
2963                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2964                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2965                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2966
2967         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2968             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2969                 bundling = 0;
2970
2971         /* Compute dif len and adjust data len to incude protection */
2972         data_bytes = cmd->bufflen;
2973         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2974
2975         switch (se_cmd->prot_op) {
2976         case TARGET_PROT_DIN_INSERT:
2977         case TARGET_PROT_DOUT_STRIP:
2978                 transfer_length = data_bytes;
2979                 if (cmd->prot_sg_cnt)
2980                         data_bytes += dif_bytes;
2981                 break;
2982         case TARGET_PROT_DIN_STRIP:
2983         case TARGET_PROT_DOUT_INSERT:
2984         case TARGET_PROT_DIN_PASS:
2985         case TARGET_PROT_DOUT_PASS:
2986                 transfer_length = data_bytes + dif_bytes;
2987                 break;
2988         default:
2989                 BUG();
2990                 break;
2991         }
2992
2993         if (!qlt_hba_err_chk_enabled(se_cmd))
2994                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2995         /* HBA error checking enabled */
2996         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2997                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2998                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2999                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3000                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3001                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3002         }
3003
3004         switch (se_cmd->prot_op) {
3005         case TARGET_PROT_DIN_INSERT:
3006         case TARGET_PROT_DOUT_INSERT:
3007                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3008                 break;
3009         case TARGET_PROT_DIN_STRIP:
3010         case TARGET_PROT_DOUT_STRIP:
3011                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3012                 break;
3013         case TARGET_PROT_DIN_PASS:
3014         case TARGET_PROT_DOUT_PASS:
3015                 fw_prot_opts |= PO_MODE_DIF_PASS;
3016                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3017                 break;
3018         default:/* Normal Request */
3019                 fw_prot_opts |= PO_MODE_DIF_PASS;
3020                 break;
3021         }
3022
3023         /* ---- PKT ---- */
3024         /* Update entry type to indicate Command Type CRC_2 IOCB */
3025         pkt->entry_type  = CTIO_CRC2;
3026         pkt->entry_count = 1;
3027         pkt->vp_index = cmd->vp_idx;
3028
3029         h = qlt_make_handle(qpair);
3030         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3031                 /*
3032                  * CTIO type 7 from the firmware doesn't provide a way to
3033                  * know the initiator's LOOP ID, hence we can't find
3034                  * the session and, so, the command.
3035                  */
3036                 return -EAGAIN;
3037         } else
3038                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3039
3040         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
3041         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3042         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3043         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3044         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3045         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3046         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3047         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3048
3049         /* silence compile warning */
3050         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3051         pkt->ox_id  = cpu_to_le16(t16);
3052
3053         t16 = (atio->u.isp24.attr << 9);
3054         pkt->flags |= cpu_to_le16(t16);
3055         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3056
3057         /* Set transfer direction */
3058         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3059                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3060         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3061                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3062
3063         pkt->dseg_count = prm->tot_dsds;
3064         /* Fibre channel byte count */
3065         pkt->transfer_length = cpu_to_le32(transfer_length);
3066
3067         /* ----- CRC context -------- */
3068
3069         /* Allocate CRC context from global pool */
3070         crc_ctx_pkt = cmd->ctx =
3071             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3072
3073         if (!crc_ctx_pkt)
3074                 goto crc_queuing_error;
3075
3076         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3077         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3078
3079         /* Set handle */
3080         crc_ctx_pkt->handle = pkt->handle;
3081
3082         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3083
3084         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
3085         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
3086         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
3087
3088         if (!bundling) {
3089                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
3090         } else {
3091                 /*
3092                  * Configure Bundling if we need to fetch interlaving
3093                  * protection PCI accesses
3094                  */
3095                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3096                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3097                 crc_ctx_pkt->u.bundling.dseg_count =
3098                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3099                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
3100         }
3101
3102         /* Finish the common fields of CRC pkt */
3103         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3104         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3105         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3106         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3107
3108         memset((uint8_t *)&tc, 0 , sizeof(tc));
3109         tc.vha = vha;
3110         tc.blk_sz = cmd->blk_sz;
3111         tc.bufflen = cmd->bufflen;
3112         tc.sg = cmd->sg;
3113         tc.prot_sg = cmd->prot_sg;
3114         tc.ctx = crc_ctx_pkt;
3115         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3116
3117         /* Walks data segments */
3118         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3119
3120         if (!bundling && prm->prot_seg_cnt) {
3121                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3122                         prm->tot_dsds, &tc))
3123                         goto crc_queuing_error;
3124         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3125                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3126                 goto crc_queuing_error;
3127
3128         if (bundling && prm->prot_seg_cnt) {
3129                 /* Walks dif segments */
3130                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3131
3132                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
3133                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3134                         prm->prot_seg_cnt, &tc))
3135                         goto crc_queuing_error;
3136         }
3137         return QLA_SUCCESS;
3138
3139 crc_queuing_error:
3140         /* Cleanup will be performed by the caller */
3141         qpair->req->outstanding_cmds[h] = NULL;
3142
3143         return QLA_FUNCTION_FAILED;
3144 }
3145
3146 /*
3147  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3148  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3149  */
3150 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3151         uint8_t scsi_status)
3152 {
3153         struct scsi_qla_host *vha = cmd->vha;
3154         struct qla_qpair *qpair = cmd->qpair;
3155         struct ctio7_to_24xx *pkt;
3156         struct qla_tgt_prm prm;
3157         uint32_t full_req_cnt = 0;
3158         unsigned long flags = 0;
3159         int res;
3160
3161         if (cmd->sess && cmd->sess->deleted) {
3162                 cmd->state = QLA_TGT_STATE_PROCESSED;
3163                 if (cmd->sess->logout_completed)
3164                         /* no need to terminate. FW already freed exchange. */
3165                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3166                 else
3167                         qlt_send_term_exchange(qpair, cmd, &cmd->atio, 0, 0);
3168                 return 0;
3169         }
3170
3171         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3172             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3173             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3174             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3175             &cmd->se_cmd, qpair->id);
3176
3177         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3178             &full_req_cnt);
3179         if (unlikely(res != 0)) {
3180                 return res;
3181         }
3182
3183         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3184
3185         if (xmit_type == QLA_TGT_XMIT_STATUS)
3186                 qpair->tgt_counters.core_qla_snd_status++;
3187         else
3188                 qpair->tgt_counters.core_qla_que_buf++;
3189
3190         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3191                 /*
3192                  * Either the port is not online or this request was from
3193                  * previous life, just abort the processing.
3194                  */
3195                 cmd->state = QLA_TGT_STATE_PROCESSED;
3196                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3197                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3198                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3199                         vha->flags.online, qla2x00_reset_active(vha),
3200                         cmd->reset_count, qpair->chip_reset);
3201                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3202                 return 0;
3203         }
3204
3205         /* Does F/W have an IOCBs for this request */
3206         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3207         if (unlikely(res))
3208                 goto out_unmap_unlock;
3209
3210         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3211                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3212         else
3213                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3214         if (unlikely(res != 0)) {
3215                 qpair->req->cnt += full_req_cnt;
3216                 goto out_unmap_unlock;
3217         }
3218
3219         pkt = (struct ctio7_to_24xx *)prm.pkt;
3220
3221         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3222                 pkt->u.status0.flags |=
3223                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3224                         CTIO7_FLAGS_STATUS_MODE_0);
3225
3226                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3227                         qlt_load_data_segments(&prm);
3228
3229                 if (prm.add_status_pkt == 0) {
3230                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3231                                 pkt->u.status0.scsi_status =
3232                                     cpu_to_le16(prm.rq_result);
3233                                 pkt->u.status0.residual =
3234                                     cpu_to_le32(prm.residual);
3235                                 pkt->u.status0.flags |= cpu_to_le16(
3236                                     CTIO7_FLAGS_SEND_STATUS);
3237                                 if (qlt_need_explicit_conf(cmd, 0)) {
3238                                         pkt->u.status0.flags |=
3239                                             cpu_to_le16(
3240                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3241                                                 CTIO7_FLAGS_CONFORM_REQ);
3242                                 }
3243                         }
3244
3245                 } else {
3246                         /*
3247                          * We have already made sure that there is sufficient
3248                          * amount of request entries to not drop HW lock in
3249                          * req_pkt().
3250                          */
3251                         struct ctio7_to_24xx *ctio =
3252                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3253                                     qpair->req);
3254
3255                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3256                             "Building additional status packet 0x%p.\n",
3257                             ctio);
3258
3259                         /*
3260                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3261                          * ctio7_to_24xx
3262                          */
3263                         memcpy(ctio, pkt, sizeof(*ctio));
3264                         /* reset back to CTIO7 */
3265                         ctio->entry_count = 1;
3266                         ctio->entry_type = CTIO_TYPE7;
3267                         ctio->dseg_count = 0;
3268                         ctio->u.status1.flags &= ~cpu_to_le16(
3269                             CTIO7_FLAGS_DATA_IN);
3270
3271                         /* Real finish is ctio_m1's finish */
3272                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3273                         pkt->u.status0.flags |= cpu_to_le16(
3274                             CTIO7_FLAGS_DONT_RET_CTIO);
3275
3276                         /* qlt_24xx_init_ctio_to_isp will correct
3277                          * all neccessary fields that's part of CTIO7.
3278                          * There should be no residual of CTIO-CRC2 data.
3279                          */
3280                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3281                             &prm);
3282                 }
3283         } else
3284                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3285
3286
3287         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3288         cmd->cmd_sent_to_fw = 1;
3289
3290         /* Memory Barrier */
3291         wmb();
3292         if (qpair->reqq_start_iocbs)
3293                 qpair->reqq_start_iocbs(qpair);
3294         else
3295                 qla2x00_start_iocbs(vha, qpair->req);
3296         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3297
3298         return 0;
3299
3300 out_unmap_unlock:
3301         qlt_unmap_sg(vha, cmd);
3302         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3303
3304         return res;
3305 }
3306 EXPORT_SYMBOL(qlt_xmit_response);
3307
3308 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3309 {
3310         struct ctio7_to_24xx *pkt;
3311         struct scsi_qla_host *vha = cmd->vha;
3312         struct qla_tgt *tgt = cmd->tgt;
3313         struct qla_tgt_prm prm;
3314         unsigned long flags = 0;
3315         int res = 0;
3316         struct qla_qpair *qpair = cmd->qpair;
3317
3318         memset(&prm, 0, sizeof(prm));
3319         prm.cmd = cmd;
3320         prm.tgt = tgt;
3321         prm.sg = NULL;
3322         prm.req_cnt = 1;
3323
3324         /* Calculate number of entries and segments required */
3325         if (qlt_pci_map_calc_cnt(&prm) != 0)
3326                 return -EAGAIN;
3327
3328         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3329             (cmd->sess && cmd->sess->deleted)) {
3330                 /*
3331                  * Either the port is not online or this request was from
3332                  * previous life, just abort the processing.
3333                  */
3334                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3335                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3336                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3337                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3338                         vha->flags.online, qla2x00_reset_active(vha),
3339                         cmd->reset_count, qpair->chip_reset);
3340                 return 0;
3341         }
3342
3343         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3344         /* Does F/W have an IOCBs for this request */
3345         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3346         if (res != 0)
3347                 goto out_unlock_free_unmap;
3348         if (cmd->se_cmd.prot_op)
3349                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3350         else
3351                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3352
3353         if (unlikely(res != 0)) {
3354                 qpair->req->cnt += prm.req_cnt;
3355                 goto out_unlock_free_unmap;
3356         }
3357
3358         pkt = (struct ctio7_to_24xx *)prm.pkt;
3359         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3360             CTIO7_FLAGS_STATUS_MODE_0);
3361
3362         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3363                 qlt_load_data_segments(&prm);
3364
3365         cmd->state = QLA_TGT_STATE_NEED_DATA;
3366         cmd->cmd_sent_to_fw = 1;
3367
3368         /* Memory Barrier */
3369         wmb();
3370         if (qpair->reqq_start_iocbs)
3371                 qpair->reqq_start_iocbs(qpair);
3372         else
3373                 qla2x00_start_iocbs(vha, qpair->req);
3374         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3375
3376         return res;
3377
3378 out_unlock_free_unmap:
3379         qlt_unmap_sg(vha, cmd);
3380         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3381
3382         return res;
3383 }
3384 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3385
3386
3387 /*
3388  * it is assumed either hardware_lock or qpair lock is held.
3389  */
3390 static void
3391 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3392         struct ctio_crc_from_fw *sts)
3393 {
3394         uint8_t         *ap = &sts->actual_dif[0];
3395         uint8_t         *ep = &sts->expected_dif[0];
3396         uint64_t        lba = cmd->se_cmd.t_task_lba;
3397         uint8_t scsi_status, sense_key, asc, ascq;
3398         unsigned long flags;
3399         struct scsi_qla_host *vha = cmd->vha;
3400
3401         cmd->trc_flags |= TRC_DIF_ERR;
3402
3403         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3404         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3405         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3406
3407         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3408         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3409         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3410
3411         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3412             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3413
3414         scsi_status = sense_key = asc = ascq = 0;
3415
3416         /* check appl tag */
3417         if (cmd->e_app_tag != cmd->a_app_tag) {
3418                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3419                     "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]",
3420                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3421                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3422                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3423                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3424
3425                 cmd->dif_err_code = DIF_ERR_APP;
3426                 scsi_status = SAM_STAT_CHECK_CONDITION;
3427                 sense_key = ABORTED_COMMAND;
3428                 asc = 0x10;
3429                 ascq = 0x2;
3430         }
3431
3432         /* check ref tag */
3433         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3434                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3435                     "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] ",
3436                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3437                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3438                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3439                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3440
3441                 cmd->dif_err_code = DIF_ERR_REF;
3442                 scsi_status = SAM_STAT_CHECK_CONDITION;
3443                 sense_key = ABORTED_COMMAND;
3444                 asc = 0x10;
3445                 ascq = 0x3;
3446                 goto out;
3447         }
3448
3449         /* check guard */
3450         if (cmd->e_guard != cmd->a_guard) {
3451                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3452                     "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]",
3453                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3454                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3455                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3456                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3457
3458                 cmd->dif_err_code = DIF_ERR_GRD;
3459                 scsi_status = SAM_STAT_CHECK_CONDITION;
3460                 sense_key = ABORTED_COMMAND;
3461                 asc = 0x10;
3462                 ascq = 0x1;
3463         }
3464 out:
3465         switch (cmd->state) {
3466         case QLA_TGT_STATE_NEED_DATA:
3467                 /* handle_data will load DIF error code  */
3468                 cmd->state = QLA_TGT_STATE_DATA_IN;
3469                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3470                 break;
3471         default:
3472                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3473                 if (cmd->aborted) {
3474                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3475                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3476                         break;
3477                 }
3478                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3479
3480                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3481                     ascq);
3482                 /* assume scsi status gets out on the wire.
3483                  * Will not wait for completion.
3484                  */
3485                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3486                 break;
3487         }
3488 }
3489
3490 /* If hardware_lock held on entry, might drop it, then reaquire */
3491 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3492 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3493         struct imm_ntfy_from_isp *ntfy)
3494 {
3495         struct nack_to_isp *nack;
3496         struct qla_hw_data *ha = vha->hw;
3497         request_t *pkt;
3498         int ret = 0;
3499
3500         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3501             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3502
3503         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3504         if (pkt == NULL) {
3505                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3506                     "qla_target(%d): %s failed: unable to allocate "
3507                     "request packet\n", vha->vp_idx, __func__);
3508                 return -ENOMEM;
3509         }
3510
3511         pkt->entry_type = NOTIFY_ACK_TYPE;
3512         pkt->entry_count = 1;
3513         pkt->handle = QLA_TGT_SKIP_HANDLE;
3514
3515         nack = (struct nack_to_isp *)pkt;
3516         nack->ox_id = ntfy->ox_id;
3517
3518         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3519         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3520                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3521                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3522         }
3523
3524         /* terminate */
3525         nack->u.isp24.flags |=
3526                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3527
3528         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3529         nack->u.isp24.status = ntfy->u.isp24.status;
3530         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3531         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3532         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3533         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3534         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3535         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3536
3537         qla2x00_start_iocbs(vha, vha->req);
3538         return ret;
3539 }
3540
3541 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3542         struct imm_ntfy_from_isp *imm, int ha_locked)
3543 {
3544         unsigned long flags = 0;
3545         int rc;
3546
3547         if (ha_locked) {
3548                 rc = __qlt_send_term_imm_notif(vha, imm);
3549
3550 #if 0   /* Todo  */
3551                 if (rc == -ENOMEM)
3552                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3553 #else
3554                 if (rc) {
3555                 }
3556 #endif
3557                 goto done;
3558         }
3559
3560         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3561         rc = __qlt_send_term_imm_notif(vha, imm);
3562
3563 #if 0   /* Todo */
3564         if (rc == -ENOMEM)
3565                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3566 #endif
3567
3568 done:
3569         if (!ha_locked)
3570                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3571 }
3572
3573 /*
3574  * If hardware_lock held on entry, might drop it, then reaquire
3575  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3576  */
3577 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3578         struct qla_tgt_cmd *cmd,
3579         struct atio_from_isp *atio)
3580 {
3581         struct scsi_qla_host *vha = qpair->vha;
3582         struct ctio7_to_24xx *ctio24;
3583         struct qla_hw_data *ha = vha->hw;
3584         request_t *pkt;
3585         int ret = 0;
3586         uint16_t temp;
3587
3588         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3589
3590         if (cmd)
3591                 vha = cmd->vha;
3592
3593         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3594         if (pkt == NULL) {
3595                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3596                     "qla_target(%d): %s failed: unable to allocate "
3597                     "request packet\n", vha->vp_idx, __func__);
3598                 return -ENOMEM;
3599         }
3600
3601         if (cmd != NULL) {
3602                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3603                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3604                             "qla_target(%d): Terminating cmd %p with "
3605                             "incorrect state %d\n", vha->vp_idx, cmd,
3606                             cmd->state);
3607                 } else
3608                         ret = 1;
3609         }
3610
3611         qpair->tgt_counters.num_term_xchg_sent++;
3612         pkt->entry_count = 1;
3613         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3614
3615         ctio24 = (struct ctio7_to_24xx *)pkt;
3616         ctio24->entry_type = CTIO_TYPE7;
3617         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3618         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3619         ctio24->vp_index = vha->vp_idx;
3620         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3621         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3622         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3623         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3624         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3625                 CTIO7_FLAGS_TERMINATE;
3626         ctio24->u.status1.flags = cpu_to_le16(temp);
3627         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3628         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3629
3630         /* Memory Barrier */
3631         wmb();
3632         if (qpair->reqq_start_iocbs)
3633                 qpair->reqq_start_iocbs(qpair);
3634         else
3635                 qla2x00_start_iocbs(vha, qpair->req);
3636         return ret;
3637 }
3638
3639 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3640         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3641         int ul_abort)
3642 {
3643         struct scsi_qla_host *vha;
3644         unsigned long flags = 0;
3645         int rc;
3646
3647         /* why use different vha? NPIV */
3648         if (cmd)
3649                 vha = cmd->vha;
3650         else
3651                 vha = qpair->vha;
3652
3653         if (ha_locked) {
3654                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3655                 if (rc == -ENOMEM)
3656                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3657                 goto done;
3658         }
3659         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3660         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3661         if (rc == -ENOMEM)
3662                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3663
3664 done:
3665         if (cmd && !ul_abort && !cmd->aborted) {
3666                 if (cmd->sg_mapped)
3667                         qlt_unmap_sg(vha, cmd);
3668                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3669         }
3670
3671         if (!ha_locked)
3672                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3673
3674         return;
3675 }
3676
3677 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3678 {
3679         struct list_head free_list;
3680         struct qla_tgt_cmd *cmd, *tcmd;
3681
3682         vha->hw->tgt.leak_exchg_thresh_hold =
3683             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3684
3685         cmd = tcmd = NULL;
3686         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3687                 INIT_LIST_HEAD(&free_list);
3688                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3689
3690                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3691                         list_del(&cmd->cmd_list);
3692                         /* This cmd was never sent to TCM.  There is no need
3693                          * to schedule free or call free_cmd
3694                          */
3695                         qlt_free_cmd(cmd);
3696                         vha->hw->tgt.num_qfull_cmds_alloc--;
3697                 }
3698         }
3699         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3700 }
3701
3702 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3703 {
3704         uint32_t total_leaked;
3705
3706         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3707
3708         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3709             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3710
3711                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3712                     "Chip reset due to exchange starvation: %d/%d.\n",
3713                     total_leaked, vha->hw->cur_fw_xcb_count);
3714
3715                 if (IS_P3P_TYPE(vha->hw))
3716                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3717                 else
3718                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3719                 qla2xxx_wake_dpc(vha);
3720         }
3721
3722 }
3723
3724 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3725 {
3726         struct qla_tgt *tgt = cmd->tgt;
3727         struct scsi_qla_host *vha = tgt->vha;
3728         struct se_cmd *se_cmd = &cmd->se_cmd;
3729         unsigned long flags;
3730
3731         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3732             "qla_target(%d): terminating exchange for aborted cmd=%p "
3733             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3734             se_cmd->tag);
3735
3736         spin_lock_irqsave(&cmd->cmd_lock, flags);
3737         if (cmd->aborted) {
3738                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3739                 /*
3740                  * It's normal to see 2 calls in this path:
3741                  *  1) XFER Rdy completion + CMD_T_ABORT
3742                  *  2) TCM TMR - drain_state_list
3743                  */
3744                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3745                     "multiple abort. %p transport_state %x, t_state %x, "
3746                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3747                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3748                 return EIO;
3749         }
3750         cmd->aborted = 1;
3751         cmd->trc_flags |= TRC_ABORT;
3752         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3753
3754         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3755         return 0;
3756 }
3757 EXPORT_SYMBOL(qlt_abort_cmd);
3758
3759 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3760 {
3761         struct fc_port *sess = cmd->sess;
3762
3763         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3764             "%s: se_cmd[%p] ox_id %04x\n",
3765             __func__, &cmd->se_cmd,
3766             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3767
3768         BUG_ON(cmd->cmd_in_wq);
3769
3770         if (cmd->sg_mapped)
3771                 qlt_unmap_sg(cmd->vha, cmd);
3772
3773         if (!cmd->q_full)
3774                 qlt_decr_num_pend_cmds(cmd->vha);
3775
3776         BUG_ON(cmd->sg_mapped);
3777         cmd->jiffies_at_free = get_jiffies_64();
3778         if (unlikely(cmd->free_sg))
3779                 kfree(cmd->sg);
3780
3781         if (!sess || !sess->se_sess) {
3782                 WARN_ON(1);
3783                 return;
3784         }
3785         cmd->jiffies_at_free = get_jiffies_64();
3786         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3787 }
3788 EXPORT_SYMBOL(qlt_free_cmd);
3789
3790 /*
3791  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3792  */
3793 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3794         struct qla_tgt_cmd *cmd, uint32_t status)
3795 {
3796         int term = 0;
3797         struct scsi_qla_host *vha = qpair->vha;
3798
3799         if (cmd->se_cmd.prot_op)
3800                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3801                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3802                     "se_cmd=%p tag[%x] op %#x/%s",
3803                      cmd->lba, cmd->lba,
3804                      cmd->num_blks, &cmd->se_cmd,
3805                      cmd->atio.u.isp24.exchange_addr,
3806                      cmd->se_cmd.prot_op,
3807                      prot_op_str(cmd->se_cmd.prot_op));
3808
3809         if (ctio != NULL) {
3810                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3811                 term = !(c->flags &
3812                     cpu_to_le16(OF_TERM_EXCH));
3813         } else
3814                 term = 1;
3815
3816         if (term)
3817                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3818
3819         return term;
3820 }
3821
3822
3823 /* ha->hardware_lock supposed to be held on entry */
3824 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3825         struct rsp_que *rsp, uint32_t handle, void *ctio)
3826 {
3827         struct qla_tgt_cmd *cmd = NULL;
3828         struct req_que *req;
3829         int qid = GET_QID(handle);
3830         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3831
3832         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3833                 return NULL;
3834
3835         if (qid == rsp->req->id) {
3836                 req = rsp->req;
3837         } else if (vha->hw->req_q_map[qid]) {
3838                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3839                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3840                     vha->vp_idx, rsp->id, handle);
3841                 req = vha->hw->req_q_map[qid];
3842         } else {
3843                 return NULL;
3844         }
3845
3846         h &= QLA_CMD_HANDLE_MASK;
3847
3848         if (h != QLA_TGT_NULL_HANDLE) {
3849                 if (unlikely(h >= req->num_outstanding_cmds)) {
3850                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3851                             "qla_target(%d): Wrong handle %x received\n",
3852                             vha->vp_idx, handle);
3853                         return NULL;
3854                 }
3855
3856                 cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h];
3857                 if (unlikely(cmd == NULL)) {
3858                         ql_dbg(ql_dbg_async, vha, 0xe053,
3859                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3860                                 vha->vp_idx, handle, req->id, rsp->id);
3861                         return NULL;
3862                 }
3863                 req->outstanding_cmds[h] = NULL;
3864         } else if (ctio != NULL) {
3865                 /* We can't get loop ID from CTIO7 */
3866                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3867                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3868                     "support NULL handles\n", vha->vp_idx);
3869                 return NULL;
3870         }
3871
3872         return cmd;
3873 }
3874
3875 /* hardware_lock should be held by caller. */
3876 void
3877 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3878 {
3879         struct qla_hw_data *ha = vha->hw;
3880
3881         if (cmd->sg_mapped)
3882                 qlt_unmap_sg(vha, cmd);
3883
3884         /* TODO: fix debug message type and ids. */
3885         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3886                 ql_dbg(ql_dbg_io, vha, 0xff00,
3887                     "HOST-ABORT: state=PROCESSED.\n");
3888         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3889                 cmd->write_data_transferred = 0;
3890                 cmd->state = QLA_TGT_STATE_DATA_IN;
3891
3892                 ql_dbg(ql_dbg_io, vha, 0xff01,
3893                     "HOST-ABORT: state=DATA_IN.\n");
3894
3895                 ha->tgt.tgt_ops->handle_data(cmd);
3896                 return;
3897         } else {
3898                 ql_dbg(ql_dbg_io, vha, 0xff03,
3899                     "HOST-ABORT: state=BAD(%d).\n",
3900                     cmd->state);
3901                 dump_stack();
3902         }
3903
3904         cmd->trc_flags |= TRC_FLUSH;
3905         ha->tgt.tgt_ops->free_cmd(cmd);
3906 }
3907
3908 /*
3909  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3910  */
3911 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3912     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3913 {
3914         struct qla_hw_data *ha = vha->hw;
3915         struct se_cmd *se_cmd;
3916         struct qla_tgt_cmd *cmd;
3917         struct qla_qpair *qpair = rsp->qpair;
3918
3919         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3920                 /* That could happen only in case of an error/reset/abort */
3921                 if (status != CTIO_SUCCESS) {
3922                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3923                             "Intermediate CTIO received"
3924                             " (status %x)\n", status);
3925                 }
3926                 return;
3927         }
3928
3929         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3930         if (cmd == NULL)
3931                 return;
3932
3933         se_cmd = &cmd->se_cmd;
3934         cmd->cmd_sent_to_fw = 0;
3935
3936         qlt_unmap_sg(vha, cmd);
3937
3938         if (unlikely(status != CTIO_SUCCESS)) {
3939                 switch (status & 0xFFFF) {
3940                 case CTIO_LIP_RESET:
3941                 case CTIO_TARGET_RESET:
3942                 case CTIO_ABORTED:
3943                         /* driver request abort via Terminate exchange */
3944                 case CTIO_TIMEOUT:
3945                 case CTIO_INVALID_RX_ID:
3946                         /* They are OK */
3947                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3948                             "qla_target(%d): CTIO with "
3949                             "status %#x received, state %x, se_cmd %p, "
3950                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3951                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3952                             status, cmd->state, se_cmd);
3953                         break;
3954
3955                 case CTIO_PORT_LOGGED_OUT:
3956                 case CTIO_PORT_UNAVAILABLE:
3957                 {
3958                         int logged_out =
3959                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3960
3961                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3962                             "qla_target(%d): CTIO with %s status %x "
3963                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3964                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3965                             status, cmd->state, se_cmd);
3966
3967                         if (logged_out && cmd->sess) {
3968                                 /*
3969                                  * Session is already logged out, but we need
3970                                  * to notify initiator, who's not aware of this
3971                                  */
3972                                 cmd->sess->logout_on_delete = 0;
3973                                 cmd->sess->send_els_logo = 1;
3974                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3975                                     "%s %d %8phC post del sess\n",
3976                                     __func__, __LINE__, cmd->sess->port_name);
3977
3978                                 qlt_schedule_sess_for_deletion(cmd->sess);
3979                         }
3980                         break;
3981                 }
3982                 case CTIO_DIF_ERROR: {
3983                         struct ctio_crc_from_fw *crc =
3984                                 (struct ctio_crc_from_fw *)ctio;
3985                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3986                             "qla_target(%d): CTIO with DIF_ERROR status %x "
3987                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3988                             "expect_dif[0x%llx]\n",
3989                             vha->vp_idx, status, cmd->state, se_cmd,
3990                             *((u64 *)&crc->actual_dif[0]),
3991                             *((u64 *)&crc->expected_dif[0]));
3992
3993                         qlt_handle_dif_error(qpair, cmd, ctio);
3994                         return;
3995                 }
3996                 default:
3997                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3998                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3999                             vha->vp_idx, status, cmd->state, se_cmd);
4000                         break;
4001                 }
4002
4003
4004                 /* "cmd->aborted" means
4005                  * cmd is already aborted/terminated, we don't
4006                  * need to terminate again.  The exchange is already
4007                  * cleaned up/freed at FW level.  Just cleanup at driver
4008                  * level.
4009                  */
4010                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4011                     (!cmd->aborted)) {
4012                         cmd->trc_flags |= TRC_CTIO_ERR;
4013                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4014                                 return;
4015                 }
4016         }
4017
4018         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4019                 cmd->trc_flags |= TRC_CTIO_DONE;
4020         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4021                 cmd->state = QLA_TGT_STATE_DATA_IN;
4022
4023                 if (status == CTIO_SUCCESS)
4024                         cmd->write_data_transferred = 1;
4025
4026                 ha->tgt.tgt_ops->handle_data(cmd);
4027                 return;
4028         } else if (cmd->aborted) {
4029                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4030                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4031                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4032         } else {
4033                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4034                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4035                     "qla_target(%d): A command in state (%d) should "
4036                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4037         }
4038
4039         if (unlikely(status != CTIO_SUCCESS) &&
4040                 !cmd->aborted) {
4041                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4042                 dump_stack();
4043         }
4044
4045         ha->tgt.tgt_ops->free_cmd(cmd);
4046 }
4047
4048 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4049         uint8_t task_codes)
4050 {
4051         int fcp_task_attr;
4052
4053         switch (task_codes) {
4054         case ATIO_SIMPLE_QUEUE:
4055                 fcp_task_attr = TCM_SIMPLE_TAG;
4056                 break;
4057         case ATIO_HEAD_OF_QUEUE:
4058                 fcp_task_attr = TCM_HEAD_TAG;
4059                 break;
4060         case ATIO_ORDERED_QUEUE:
4061                 fcp_task_attr = TCM_ORDERED_TAG;
4062                 break;
4063         case ATIO_ACA_QUEUE:
4064                 fcp_task_attr = TCM_ACA_TAG;
4065                 break;
4066         case ATIO_UNTAGGED:
4067                 fcp_task_attr = TCM_SIMPLE_TAG;
4068                 break;
4069         default:
4070                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4071                     "qla_target: unknown task code %x, use ORDERED instead\n",
4072                     task_codes);
4073                 fcp_task_attr = TCM_ORDERED_TAG;
4074                 break;
4075         }
4076
4077         return fcp_task_attr;
4078 }
4079
4080 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
4081                                         uint8_t *);
4082 /*
4083  * Process context for I/O path into tcm_qla2xxx code
4084  */
4085 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4086 {
4087         scsi_qla_host_t *vha = cmd->vha;
4088         struct qla_hw_data *ha = vha->hw;
4089         struct fc_port *sess = cmd->sess;
4090         struct atio_from_isp *atio = &cmd->atio;
4091         unsigned char *cdb;
4092         unsigned long flags;
4093         uint32_t data_length;
4094         int ret, fcp_task_attr, data_dir, bidi = 0;
4095         struct qla_qpair *qpair = cmd->qpair;
4096
4097         cmd->cmd_in_wq = 0;
4098         cmd->trc_flags |= TRC_DO_WORK;
4099
4100         if (cmd->aborted) {
4101                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4102                     "cmd with tag %u is aborted\n",
4103                     cmd->atio.u.isp24.exchange_addr);
4104                 goto out_term;
4105         }
4106
4107         spin_lock_init(&cmd->cmd_lock);
4108         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4109         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4110
4111         if (atio->u.isp24.fcp_cmnd.rddata &&
4112             atio->u.isp24.fcp_cmnd.wrdata) {
4113                 bidi = 1;
4114                 data_dir = DMA_TO_DEVICE;
4115         } else if (atio->u.isp24.fcp_cmnd.rddata)
4116                 data_dir = DMA_FROM_DEVICE;
4117         else if (atio->u.isp24.fcp_cmnd.wrdata)
4118                 data_dir = DMA_TO_DEVICE;
4119         else
4120                 data_dir = DMA_NONE;
4121
4122         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4123             atio->u.isp24.fcp_cmnd.task_attr);
4124         data_length = get_datalen_for_atio(atio);
4125
4126         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4127                                           fcp_task_attr, data_dir, bidi);
4128         if (ret != 0)
4129                 goto out_term;
4130         /*
4131          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4132          */
4133         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4134         ha->tgt.tgt_ops->put_sess(sess);
4135         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4136         return;
4137
4138 out_term:
4139         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4140         /*
4141          * cmd has not sent to target yet, so pass NULL as the second
4142          * argument to qlt_send_term_exchange() and free the memory here.
4143          */
4144         cmd->trc_flags |= TRC_DO_WORK_ERR;
4145         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4146         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4147
4148         qlt_decr_num_pend_cmds(vha);
4149         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
4150         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4151
4152         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4153         ha->tgt.tgt_ops->put_sess(sess);
4154         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4155 }
4156
4157 static void qlt_do_work(struct work_struct *work)
4158 {
4159         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4160         scsi_qla_host_t *vha = cmd->vha;
4161         unsigned long flags;
4162
4163         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4164         list_del(&cmd->cmd_list);
4165         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4166
4167         __qlt_do_work(cmd);
4168 }
4169
4170 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4171 {
4172         unsigned long flags;
4173         struct qla_hw_data *ha = vha->hw;
4174         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4175         void *node;
4176         u64 key = 0;
4177
4178         ql_log(ql_log_info, vha, 0x706c,
4179             "User update Number of Active Qpairs %d\n",
4180             ha->tgt.num_act_qpairs);
4181
4182         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4183
4184         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4185                 btree_remove64(&tgt->lun_qpair_map, key);
4186
4187         ha->base_qpair->lun_cnt = 0;
4188         for (key = 0; key < ha->max_qpairs; key++)
4189                 if (ha->queue_pair_map[key])
4190                         ha->queue_pair_map[key]->lun_cnt = 0;
4191
4192         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4193 }
4194
4195 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4196         struct qla_tgt_cmd *cmd)
4197 {
4198         struct qla_qpair *qpair, *qp;
4199         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4200         struct qla_qpair_hint *h;
4201
4202         if (vha->flags.qpairs_available) {
4203                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4204                 if (unlikely(!h)) {
4205                         /* spread lun to qpair ratio evently */
4206                         int lcnt = 0, rc;
4207                         struct scsi_qla_host *base_vha =
4208                                 pci_get_drvdata(vha->hw->pdev);
4209
4210                         qpair = vha->hw->base_qpair;
4211                         if (qpair->lun_cnt == 0) {
4212                                 qpair->lun_cnt++;
4213                                 h = qla_qpair_to_hint(tgt, qpair);
4214                                 BUG_ON(!h);
4215                                 rc = btree_insert64(&tgt->lun_qpair_map,
4216                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4217                                 if (rc) {
4218                                         qpair->lun_cnt--;
4219                                         ql_log(ql_log_info, vha, 0xd037,
4220                                             "Unable to insert lun %llx into lun_qpair_map\n",
4221                                             cmd->unpacked_lun);
4222                                 }
4223                                 goto out;
4224                         } else {
4225                                 lcnt = qpair->lun_cnt;
4226                         }
4227
4228                         h = NULL;
4229                         list_for_each_entry(qp, &base_vha->qp_list,
4230                             qp_list_elem) {
4231                                 if (qp->lun_cnt == 0) {
4232                                         qp->lun_cnt++;
4233                                         h = qla_qpair_to_hint(tgt, qp);
4234                                         BUG_ON(!h);
4235                                         rc = btree_insert64(&tgt->lun_qpair_map,
4236                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4237                                         if (rc) {
4238                                                 qp->lun_cnt--;
4239                                                 ql_log(ql_log_info, vha, 0xd038,
4240                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4241                                                         cmd->unpacked_lun);
4242                                         }
4243                                         qpair = qp;
4244                                         goto out;
4245                                 } else {
4246                                         if (qp->lun_cnt < lcnt) {
4247                                                 lcnt = qp->lun_cnt;
4248                                                 qpair = qp;
4249                                                 continue;
4250                                         }
4251                                 }
4252                         }
4253                         BUG_ON(!qpair);
4254                         qpair->lun_cnt++;
4255                         h = qla_qpair_to_hint(tgt, qpair);
4256                         BUG_ON(!h);
4257                         rc = btree_insert64(&tgt->lun_qpair_map,
4258                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4259                         if (rc) {
4260                                 qpair->lun_cnt--;
4261                                 ql_log(ql_log_info, vha, 0xd039,
4262                                    "Unable to insert lun %llx into lun_qpair_map\n",
4263                                    cmd->unpacked_lun);
4264                         }
4265                 }
4266         } else {
4267                 h = &tgt->qphints[0];
4268         }
4269 out:
4270         cmd->qpair = h->qpair;
4271         cmd->se_cmd.cpuid = h->cpuid;
4272 }
4273
4274 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4275                                        struct fc_port *sess,
4276                                        struct atio_from_isp *atio)
4277 {
4278         struct se_session *se_sess = sess->se_sess;
4279         struct qla_tgt_cmd *cmd;
4280         int tag;
4281
4282         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4283         if (tag < 0)
4284                 return NULL;
4285
4286         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4287         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4288         cmd->cmd_type = TYPE_TGT_CMD;
4289         memcpy(&cmd->atio, atio, sizeof(*atio));
4290         cmd->state = QLA_TGT_STATE_NEW;
4291         cmd->tgt = vha->vha_tgt.qla_tgt;
4292         qlt_incr_num_pend_cmds(vha);
4293         cmd->vha = vha;
4294         cmd->se_cmd.map_tag = tag;
4295         cmd->sess = sess;
4296         cmd->loop_id = sess->loop_id;
4297         cmd->conf_compl_supported = sess->conf_compl_supported;
4298
4299         cmd->trc_flags = 0;
4300         cmd->jiffies_at_alloc = get_jiffies_64();
4301
4302         cmd->unpacked_lun = scsilun_to_int(
4303             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4304         qlt_assign_qpair(vha, cmd);
4305         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4306         cmd->vp_idx = vha->vp_idx;
4307
4308         return cmd;
4309 }
4310
4311 /* ha->hardware_lock supposed to be held on entry */
4312 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4313         struct atio_from_isp *atio)
4314 {
4315         struct qla_hw_data *ha = vha->hw;
4316         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4317         struct fc_port *sess;
4318         struct qla_tgt_cmd *cmd;
4319         unsigned long flags;
4320         port_id_t id;
4321
4322         if (unlikely(tgt->tgt_stop)) {
4323                 ql_dbg(ql_dbg_io, vha, 0x3061,
4324                     "New command while device %p is shutting down\n", tgt);
4325                 return -ENODEV;
4326         }
4327
4328         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
4329         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
4330         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
4331         if (IS_SW_RESV_ADDR(id))
4332                 return -EBUSY;
4333
4334         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4335         if (unlikely(!sess))
4336                 return -EFAULT;
4337
4338         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4339          * session deletion, but it's still in sess_del_work wq */
4340         if (sess->deleted) {
4341                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4342                     "New command while old session %p is being deleted\n",
4343                     sess);
4344                 return -EFAULT;
4345         }
4346
4347         /*
4348          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4349          */
4350         if (!kref_get_unless_zero(&sess->sess_kref)) {
4351                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4352                     "%s: kref_get fail, %8phC oxid %x \n",
4353                     __func__, sess->port_name,
4354                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4355                 return -EFAULT;
4356         }
4357
4358         cmd = qlt_get_tag(vha, sess, atio);
4359         if (!cmd) {
4360                 ql_dbg(ql_dbg_io, vha, 0x3062,
4361                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4362                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4363                 ha->tgt.tgt_ops->put_sess(sess);
4364                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4365                 return -EBUSY;
4366         }
4367
4368         cmd->cmd_in_wq = 1;
4369         cmd->trc_flags |= TRC_NEW_CMD;
4370
4371         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4372         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4373         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4374
4375         INIT_WORK(&cmd->work, qlt_do_work);
4376         if (vha->flags.qpairs_available) {
4377                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4378         } else if (ha->msix_count) {
4379                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4380                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4381                             &cmd->work);
4382                 else
4383                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4384                             &cmd->work);
4385         } else {
4386                 queue_work(qla_tgt_wq, &cmd->work);
4387         }
4388
4389         return 0;
4390 }
4391
4392 /* ha->hardware_lock supposed to be held on entry */
4393 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4394         int fn, void *iocb, int flags)
4395 {
4396         struct scsi_qla_host *vha = sess->vha;
4397         struct qla_hw_data *ha = vha->hw;
4398         struct qla_tgt_mgmt_cmd *mcmd;
4399         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4400         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4401
4402         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4403         if (!mcmd) {
4404                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4405                     "qla_target(%d): Allocation of management "
4406                     "command failed, some commands and their data could "
4407                     "leak\n", vha->vp_idx);
4408                 return -ENOMEM;
4409         }
4410         memset(mcmd, 0, sizeof(*mcmd));
4411         mcmd->sess = sess;
4412
4413         if (iocb) {
4414                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4415                     sizeof(mcmd->orig_iocb.imm_ntfy));
4416         }
4417         mcmd->tmr_func = fn;
4418         mcmd->flags = flags;
4419         mcmd->reset_count = ha->base_qpair->chip_reset;
4420         mcmd->qpair = h->qpair;
4421         mcmd->vha = vha;
4422         mcmd->se_cmd.cpuid = h->cpuid;
4423         mcmd->unpacked_lun = lun;
4424
4425         switch (fn) {
4426         case QLA_TGT_LUN_RESET:
4427         case QLA_TGT_CLEAR_TS:
4428         case QLA_TGT_ABORT_TS:
4429                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4430                 /* drop through */
4431         case QLA_TGT_CLEAR_ACA:
4432                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4433                 mcmd->qpair = h->qpair;
4434                 mcmd->se_cmd.cpuid = h->cpuid;
4435                 break;
4436
4437         case QLA_TGT_TARGET_RESET:
4438         case QLA_TGT_NEXUS_LOSS_SESS:
4439         case QLA_TGT_NEXUS_LOSS:
4440         case QLA_TGT_ABORT_ALL:
4441         default:
4442                 /* no-op */
4443                 break;
4444         }
4445
4446         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4447         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4448             &mcmd->work);
4449
4450         return 0;
4451 }
4452
4453 /* ha->hardware_lock supposed to be held on entry */
4454 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4455 {
4456         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4457         struct qla_hw_data *ha = vha->hw;
4458         struct fc_port *sess;
4459         u64 unpacked_lun;
4460         int fn;
4461         unsigned long flags;
4462
4463         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4464
4465         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4466         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4467             a->u.isp24.fcp_hdr.s_id);
4468         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4469
4470         unpacked_lun =
4471             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4472
4473         if (sess == NULL || sess->deleted)
4474                 return -EFAULT;
4475
4476         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4477 }
4478
4479 /* ha->hardware_lock supposed to be held on entry */
4480 static int __qlt_abort_task(struct scsi_qla_host *vha,
4481         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4482 {
4483         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4484         struct qla_hw_data *ha = vha->hw;
4485         struct qla_tgt_mgmt_cmd *mcmd;
4486         u64 unpacked_lun;
4487         int rc;
4488
4489         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4490         if (mcmd == NULL) {
4491                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4492                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4493                     vha->vp_idx, __func__);
4494                 return -ENOMEM;
4495         }
4496         memset(mcmd, 0, sizeof(*mcmd));
4497
4498         mcmd->sess = sess;
4499         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4500             sizeof(mcmd->orig_iocb.imm_ntfy));
4501
4502         unpacked_lun =
4503             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4504         mcmd->reset_count = ha->base_qpair->chip_reset;
4505         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4506         mcmd->qpair = ha->base_qpair;
4507
4508         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4509             le16_to_cpu(iocb->u.isp2x.seq_id));
4510         if (rc != 0) {
4511                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4512                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4513                     vha->vp_idx, rc);
4514                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4515                 return -EFAULT;
4516         }
4517
4518         return 0;
4519 }
4520
4521 /* ha->hardware_lock supposed to be held on entry */
4522 static int qlt_abort_task(struct scsi_qla_host *vha,
4523         struct imm_ntfy_from_isp *iocb)
4524 {
4525         struct qla_hw_data *ha = vha->hw;
4526         struct fc_port *sess;
4527         int loop_id;
4528         unsigned long flags;
4529
4530         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4531
4532         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4533         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4534         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4535
4536         if (sess == NULL) {
4537                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4538                     "qla_target(%d): task abort for unexisting "
4539                     "session\n", vha->vp_idx);
4540                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4541                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4542         }
4543
4544         return __qlt_abort_task(vha, iocb, sess);
4545 }
4546
4547 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4548 {
4549         if (rc != MBS_COMMAND_COMPLETE) {
4550                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4551                         "%s: se_sess %p / sess %p from"
4552                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4553                         " LOGO failed: %#x\n",
4554                         __func__,
4555                         fcport->se_sess,
4556                         fcport,
4557                         fcport->port_name, fcport->loop_id,
4558                         fcport->d_id.b.domain, fcport->d_id.b.area,
4559                         fcport->d_id.b.al_pa, rc);
4560         }
4561
4562         fcport->logout_completed = 1;
4563 }
4564
4565 /*
4566 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4567 *
4568 * Schedules sessions with matching port_id/loop_id but different wwn for
4569 * deletion. Returns existing session with matching wwn if present.
4570 * Null otherwise.
4571 */
4572 struct fc_port *
4573 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4574     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4575 {
4576         struct fc_port *sess = NULL, *other_sess;
4577         uint64_t other_wwn;
4578
4579         *conflict_sess = NULL;
4580
4581         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4582
4583                 other_wwn = wwn_to_u64(other_sess->port_name);
4584
4585                 if (wwn == other_wwn) {
4586                         WARN_ON(sess);
4587                         sess = other_sess;
4588                         continue;
4589                 }
4590
4591                 /* find other sess with nport_id collision */
4592                 if (port_id.b24 == other_sess->d_id.b24) {
4593                         if (loop_id != other_sess->loop_id) {
4594                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4595                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4596                                     other_sess, other_sess->loop_id, other_wwn);
4597
4598                                 /*
4599                                  * logout_on_delete is set by default, but another
4600                                  * session that has the same s_id/loop_id combo
4601                                  * might have cleared it when requested this session
4602                                  * deletion, so don't touch it
4603                                  */
4604                                 qlt_schedule_sess_for_deletion(other_sess);
4605                         } else {
4606                                 /*
4607                                  * Another wwn used to have our s_id/loop_id
4608                                  * kill the session, but don't free the loop_id
4609                                  */
4610                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4611                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4612                                     other_sess, other_sess->loop_id, other_wwn);
4613
4614                                 other_sess->keep_nport_handle = 1;
4615                                 if (other_sess->disc_state != DSC_DELETED)
4616                                         *conflict_sess = other_sess;
4617                                 qlt_schedule_sess_for_deletion(other_sess);
4618                         }
4619                         continue;
4620                 }
4621
4622                 /* find other sess with nport handle collision */
4623                 if ((loop_id == other_sess->loop_id) &&
4624                         (loop_id != FC_NO_LOOP_ID)) {
4625                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4626                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4627                                other_sess, other_sess->loop_id, other_wwn);
4628
4629                         /* Same loop_id but different s_id
4630                          * Ok to kill and logout */
4631                         qlt_schedule_sess_for_deletion(other_sess);
4632                 }
4633         }
4634
4635         return sess;
4636 }
4637
4638 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4639 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4640 {
4641         struct qla_tgt_sess_op *op;
4642         struct qla_tgt_cmd *cmd;
4643         uint32_t key;
4644         int count = 0;
4645         unsigned long flags;
4646
4647         key = (((u32)s_id->b.domain << 16) |
4648                ((u32)s_id->b.area   <<  8) |
4649                ((u32)s_id->b.al_pa));
4650
4651         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4652         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4653                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4654
4655                 if (op_key == key) {
4656                         op->aborted = true;
4657                         count++;
4658                 }
4659         }
4660
4661         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4662                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4663                 if (op_key == key) {
4664                         op->aborted = true;
4665                         count++;
4666                 }
4667         }
4668
4669         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4670                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4671                 if (cmd_key == key) {
4672                         cmd->aborted = 1;
4673                         count++;
4674                 }
4675         }
4676         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4677
4678         return count;
4679 }
4680
4681 static int qlt_handle_login(struct scsi_qla_host *vha,
4682     struct imm_ntfy_from_isp *iocb)
4683 {
4684         struct fc_port *sess = NULL, *conflict_sess = NULL;
4685         uint64_t wwn;
4686         port_id_t port_id;
4687         uint16_t loop_id, wd3_lo;
4688         int res = 0;
4689         struct qlt_plogi_ack_t *pla;
4690         unsigned long flags;
4691
4692         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4693
4694         port_id.b.domain = iocb->u.isp24.port_id[2];
4695         port_id.b.area   = iocb->u.isp24.port_id[1];
4696         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4697         port_id.b.rsvd_1 = 0;
4698
4699         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4700
4701         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4702         abort_cmds_for_s_id(vha, &port_id);
4703
4704         if (wwn) {
4705                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4706                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4707                     port_id, loop_id, &conflict_sess);
4708                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4709         }
4710
4711         if (IS_SW_RESV_ADDR(port_id)) {
4712                 res = 1;
4713                 goto out;
4714         }
4715
4716         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4717         if (!pla) {
4718                 qlt_send_term_imm_notif(vha, iocb, 1);
4719                 goto out;
4720         }
4721
4722         if (conflict_sess) {
4723                 conflict_sess->login_gen++;
4724                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4725                     QLT_PLOGI_LINK_CONFLICT);
4726         }
4727
4728         if (!sess) {
4729                 pla->ref_count++;
4730                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4731                     "%s %d %8phC post new sess\n",
4732                     __func__, __LINE__, iocb->u.isp24.port_name);
4733                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4734                         qla24xx_post_newsess_work(vha, &port_id,
4735                             iocb->u.isp24.port_name,
4736                             iocb->u.isp24.u.plogi.node_name,
4737                             pla, FC4_TYPE_UNKNOWN);
4738                 else
4739                         qla24xx_post_newsess_work(vha, &port_id,
4740                             iocb->u.isp24.port_name, NULL,
4741                             pla, FC4_TYPE_UNKNOWN);
4742
4743                 goto out;
4744         }
4745
4746         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4747         sess->d_id = port_id;
4748         sess->login_gen++;
4749
4750         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4751                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4752                 sess->local = 0;
4753                 sess->loop_id = loop_id;
4754                 sess->d_id = port_id;
4755                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4756                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4757
4758                 if (wd3_lo & BIT_7)
4759                         sess->conf_compl_supported = 1;
4760
4761                 if ((wd3_lo & BIT_4) == 0)
4762                         sess->port_type = FCT_INITIATOR;
4763                 else
4764                         sess->port_type = FCT_TARGET;
4765
4766         } else
4767                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4768
4769
4770         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4771             "%s %d %8phC  DS %d\n",
4772             __func__, __LINE__, sess->port_name, sess->disc_state);
4773
4774         switch (sess->disc_state) {
4775         case DSC_DELETED:
4776                 qlt_plogi_ack_unref(vha, pla);
4777                 break;
4778
4779         default:
4780                 /*
4781                  * Under normal circumstances we want to release nport handle
4782                  * during LOGO process to avoid nport handle leaks inside FW.
4783                  * The exception is when LOGO is done while another PLOGI with
4784                  * the same nport handle is waiting as might be the case here.
4785                  * Note: there is always a possibily of a race where session
4786                  * deletion has already started for other reasons (e.g. ACL
4787                  * removal) and now PLOGI arrives:
4788                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4789                  *    FW must have assigned this PLOGI a new/same handle and we
4790                  *    can proceed ACK'ing it as usual when session deletion
4791                  *    completes.
4792                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4793                  *    bit reached it, the handle has now been released. We'll
4794                  *    get an error when we ACK this PLOGI. Nothing will be sent
4795                  *    back to initiator. Initiator should eventually retry
4796                  *    PLOGI and situation will correct itself.
4797                  */
4798                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4799                     (sess->d_id.b24 == port_id.b24));
4800
4801                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4802                     "%s %d %8phC post del sess\n",
4803                     __func__, __LINE__, sess->port_name);
4804
4805
4806                 qlt_schedule_sess_for_deletion(sess);
4807                 break;
4808         }
4809 out:
4810         return res;
4811 }
4812
4813 /*
4814  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4815  */
4816 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4817         struct imm_ntfy_from_isp *iocb)
4818 {
4819         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4820         struct qla_hw_data *ha = vha->hw;
4821         struct fc_port *sess = NULL, *conflict_sess = NULL;
4822         uint64_t wwn;
4823         port_id_t port_id;
4824         uint16_t loop_id;
4825         uint16_t wd3_lo;
4826         int res = 0;
4827         unsigned long flags;
4828
4829         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4830
4831         port_id.b.domain = iocb->u.isp24.port_id[2];
4832         port_id.b.area   = iocb->u.isp24.port_id[1];
4833         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4834         port_id.b.rsvd_1 = 0;
4835
4836         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4837
4838         ql_dbg(ql_dbg_disc, vha, 0xf026,
4839             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4840             vha->vp_idx, iocb->u.isp24.port_id[2],
4841                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4842                    iocb->u.isp24.status_subcode, loop_id,
4843                 iocb->u.isp24.port_name);
4844
4845         /* res = 1 means ack at the end of thread
4846          * res = 0 means ack async/later.
4847          */
4848         switch (iocb->u.isp24.status_subcode) {
4849         case ELS_PLOGI:
4850                 res = qlt_handle_login(vha, iocb);
4851                 break;
4852
4853         case ELS_PRLI:
4854                 if (N2N_TOPO(ha)) {
4855                         sess = qla2x00_find_fcport_by_wwpn(vha,
4856                             iocb->u.isp24.port_name, 1);
4857
4858                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4859                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4860                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4861                                     __func__, __LINE__,
4862                                     iocb->u.isp24.port_name);
4863                                 qlt_send_term_imm_notif(vha, iocb, 1);
4864                                 break;
4865                         }
4866
4867                         res = qlt_handle_login(vha, iocb);
4868                         break;
4869                 }
4870
4871                 if (IS_SW_RESV_ADDR(port_id)) {
4872                         res = 1;
4873                         break;
4874                 }
4875
4876                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4877
4878                 if (wwn) {
4879                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4880                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4881                                 loop_id, &conflict_sess);
4882                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4883                 }
4884
4885                 if (conflict_sess) {
4886                         switch (conflict_sess->disc_state) {
4887                         case DSC_DELETED:
4888                         case DSC_DELETE_PEND:
4889                                 break;
4890                         default:
4891                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4892                                     "PRLI with conflicting sess %p port %8phC\n",
4893                                     conflict_sess, conflict_sess->port_name);
4894                                 conflict_sess->fw_login_state =
4895                                     DSC_LS_PORT_UNAVAIL;
4896                                 qlt_send_term_imm_notif(vha, iocb, 1);
4897                                 res = 0;
4898                                 break;
4899                         }
4900                 }
4901
4902                 if (sess != NULL) {
4903                         bool delete = false;
4904                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4905                         switch (sess->fw_login_state) {
4906                         case DSC_LS_PLOGI_PEND:
4907                         case DSC_LS_PLOGI_COMP:
4908                         case DSC_LS_PRLI_COMP:
4909                                 break;
4910                         default:
4911                                 delete = true;
4912                                 break;
4913                         }
4914
4915                         switch (sess->disc_state) {
4916                         case DSC_LOGIN_PEND:
4917                         case DSC_GPDB:
4918                         case DSC_UPD_FCPORT:
4919                         case DSC_LOGIN_COMPLETE:
4920                         case DSC_ADISC:
4921                                 delete = false;
4922                                 break;
4923                         default:
4924                                 break;
4925                         }
4926
4927                         if (delete) {
4928                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4929                                     flags);
4930                                 /*
4931                                  * Impatient initiator sent PRLI before last
4932                                  * PLOGI could finish. Will force him to re-try,
4933                                  * while last one finishes.
4934                                  */
4935                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4936                                     "sess %p PRLI received, before plogi ack.\n",
4937                                     sess);
4938                                 qlt_send_term_imm_notif(vha, iocb, 1);
4939                                 res = 0;
4940                                 break;
4941                         }
4942
4943                         /*
4944                          * This shouldn't happen under normal circumstances,
4945                          * since we have deleted the old session during PLOGI
4946                          */
4947                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4948                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4949                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4950
4951                         sess->local = 0;
4952                         sess->loop_id = loop_id;
4953                         sess->d_id = port_id;
4954                         sess->fw_login_state = DSC_LS_PRLI_PEND;
4955
4956                         if (wd3_lo & BIT_7)
4957                                 sess->conf_compl_supported = 1;
4958
4959                         if ((wd3_lo & BIT_4) == 0)
4960                                 sess->port_type = FCT_INITIATOR;
4961                         else
4962                                 sess->port_type = FCT_TARGET;
4963
4964                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4965                 }
4966                 res = 1; /* send notify ack */
4967
4968                 /* Make session global (not used in fabric mode) */
4969                 if (ha->current_topology != ISP_CFG_F) {
4970                         if (sess) {
4971                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
4972                                     "%s %d %8phC post nack\n",
4973                                     __func__, __LINE__, sess->port_name);
4974                                 qla24xx_post_nack_work(vha, sess, iocb,
4975                                         SRB_NACK_PRLI);
4976                                 res = 0;
4977                         } else {
4978                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4979                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4980                                 qla2xxx_wake_dpc(vha);
4981                         }
4982                 } else {
4983                         if (sess) {
4984                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
4985                                     "%s %d %8phC post nack\n",
4986                                     __func__, __LINE__, sess->port_name);
4987                                 qla24xx_post_nack_work(vha, sess, iocb,
4988                                         SRB_NACK_PRLI);
4989                                 res = 0;
4990                         }
4991                 }
4992                 break;
4993
4994         case ELS_TPRLO:
4995                 if (le16_to_cpu(iocb->u.isp24.flags) &
4996                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
4997                         loop_id = 0xFFFF;
4998                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
4999                         res = 1;
5000                         break;
5001                 }
5002                 /* fall through */
5003         case ELS_LOGO:
5004         case ELS_PRLO:
5005                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5006                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5007                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5008
5009                 if (sess) {
5010                         sess->login_gen++;
5011                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5012                         sess->logo_ack_needed = 1;
5013                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5014                 }
5015
5016                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5017
5018                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5019                     "%s: logo %llx res %d sess %p ",
5020                     __func__, wwn, res, sess);
5021                 if (res == 0) {
5022                         /*
5023                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5024                          * for LOGO_ACK & sess delete
5025                          */
5026                         BUG_ON(!sess);
5027                         res = 0;
5028                 } else {
5029                         /* cmd did not go to upper layer. */
5030                         if (sess) {
5031                                 qlt_schedule_sess_for_deletion(sess);
5032                                 res = 0;
5033                         }
5034                         /* else logo will be ack */
5035                 }
5036                 break;
5037         case ELS_PDISC:
5038         case ELS_ADISC:
5039         {
5040                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5041                 if (tgt->link_reinit_iocb_pending) {
5042                         qlt_send_notify_ack(ha->base_qpair,
5043                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5044                         tgt->link_reinit_iocb_pending = 0;
5045                 }
5046
5047                 sess = qla2x00_find_fcport_by_wwpn(vha,
5048                     iocb->u.isp24.port_name, 1);
5049                 if (sess) {
5050                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5051                                 "sess %p lid %d|%d DS %d LS %d\n",
5052                                 sess, sess->loop_id, loop_id,
5053                                 sess->disc_state, sess->fw_login_state);
5054                 }
5055
5056                 res = 1; /* send notify ack */
5057                 break;
5058         }
5059
5060         case ELS_FLOGI: /* should never happen */
5061         default:
5062                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5063                     "qla_target(%d): Unsupported ELS command %x "
5064                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5065                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5066                 break;
5067         }
5068
5069         ql_dbg(ql_dbg_disc, vha, 0xf026,
5070             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5071             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5072
5073         return res;
5074 }
5075
5076 /*
5077  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5078  */
5079 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5080         struct imm_ntfy_from_isp *iocb)
5081 {
5082         struct qla_hw_data *ha = vha->hw;
5083         uint32_t add_flags = 0;
5084         int send_notify_ack = 1;
5085         uint16_t status;
5086
5087         status = le16_to_cpu(iocb->u.isp2x.status);
5088         switch (status) {
5089         case IMM_NTFY_LIP_RESET:
5090         {
5091                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5092                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5093                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5094                     iocb->u.isp24.status_subcode);
5095
5096                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5097                         send_notify_ack = 0;
5098                 break;
5099         }
5100
5101         case IMM_NTFY_LIP_LINK_REINIT:
5102         {
5103                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5104                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5105                     "qla_target(%d): LINK REINIT (loop %#x, "
5106                     "subcode %x)\n", vha->vp_idx,
5107                     le16_to_cpu(iocb->u.isp24.nport_handle),
5108                     iocb->u.isp24.status_subcode);
5109                 if (tgt->link_reinit_iocb_pending) {
5110                         qlt_send_notify_ack(ha->base_qpair,
5111                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5112                 }
5113                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5114                 tgt->link_reinit_iocb_pending = 1;
5115                 /*
5116                  * QLogic requires to wait after LINK REINIT for possible
5117                  * PDISC or ADISC ELS commands
5118                  */
5119                 send_notify_ack = 0;
5120                 break;
5121         }
5122
5123         case IMM_NTFY_PORT_LOGOUT:
5124                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5125                     "qla_target(%d): Port logout (loop "
5126                     "%#x, subcode %x)\n", vha->vp_idx,
5127                     le16_to_cpu(iocb->u.isp24.nport_handle),
5128                     iocb->u.isp24.status_subcode);
5129
5130                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5131                         send_notify_ack = 0;
5132                 /* The sessions will be cleared in the callback, if needed */
5133                 break;
5134
5135         case IMM_NTFY_GLBL_TPRLO:
5136                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5137                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5138                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5139                         send_notify_ack = 0;
5140                 /* The sessions will be cleared in the callback, if needed */
5141                 break;
5142
5143         case IMM_NTFY_PORT_CONFIG:
5144                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5145                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5146                     status);
5147                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5148                         send_notify_ack = 0;
5149                 /* The sessions will be cleared in the callback, if needed */
5150                 break;
5151
5152         case IMM_NTFY_GLBL_LOGO:
5153                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5154                     "qla_target(%d): Link failure detected\n",
5155                     vha->vp_idx);
5156                 /* I_T nexus loss */
5157                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5158                         send_notify_ack = 0;
5159                 break;
5160
5161         case IMM_NTFY_IOCB_OVERFLOW:
5162                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5163                     "qla_target(%d): Cannot provide requested "
5164                     "capability (IOCB overflowed the immediate notify "
5165                     "resource count)\n", vha->vp_idx);
5166                 break;
5167
5168         case IMM_NTFY_ABORT_TASK:
5169                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5170                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5171                     "L %#x)\n", vha->vp_idx,
5172                     le16_to_cpu(iocb->u.isp2x.seq_id),
5173                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5174                     le16_to_cpu(iocb->u.isp2x.lun));
5175                 if (qlt_abort_task(vha, iocb) == 0)
5176                         send_notify_ack = 0;
5177                 break;
5178
5179         case IMM_NTFY_RESOURCE:
5180                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5181                     "qla_target(%d): Out of resources, host %ld\n",
5182                     vha->vp_idx, vha->host_no);
5183                 break;
5184
5185         case IMM_NTFY_MSG_RX:
5186                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5187                     "qla_target(%d): Immediate notify task %x\n",
5188                     vha->vp_idx, iocb->u.isp2x.task_flags);
5189                 break;
5190
5191         case IMM_NTFY_ELS:
5192                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5193                         send_notify_ack = 0;
5194                 break;
5195         default:
5196                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5197                     "qla_target(%d): Received unknown immediate "
5198                     "notify status %x\n", vha->vp_idx, status);
5199                 break;
5200         }
5201
5202         if (send_notify_ack)
5203                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5204                     0, 0);
5205 }
5206
5207 /*
5208  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5209  * This function sends busy to ISP 2xxx or 24xx.
5210  */
5211 static int __qlt_send_busy(struct qla_qpair *qpair,
5212         struct atio_from_isp *atio, uint16_t status)
5213 {
5214         struct scsi_qla_host *vha = qpair->vha;
5215         struct ctio7_to_24xx *ctio24;
5216         struct qla_hw_data *ha = vha->hw;
5217         request_t *pkt;
5218         struct fc_port *sess = NULL;
5219         unsigned long flags;
5220         u16 temp;
5221         port_id_t id;
5222
5223         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
5224         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
5225         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
5226         id.b.rsvd_1 = 0;
5227
5228         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5229         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5230         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5231         if (!sess) {
5232                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5233                 return 0;
5234         }
5235         /* Sending marker isn't necessary, since we called from ISR */
5236
5237         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5238         if (!pkt) {
5239                 ql_dbg(ql_dbg_io, vha, 0x3063,
5240                     "qla_target(%d): %s failed: unable to allocate "
5241                     "request packet", vha->vp_idx, __func__);
5242                 return -ENOMEM;
5243         }
5244
5245         qpair->tgt_counters.num_q_full_sent++;
5246         pkt->entry_count = 1;
5247         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5248
5249         ctio24 = (struct ctio7_to_24xx *)pkt;
5250         ctio24->entry_type = CTIO_TYPE7;
5251         ctio24->nport_handle = sess->loop_id;
5252         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5253         ctio24->vp_index = vha->vp_idx;
5254         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5255         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5256         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5257         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5258         temp = (atio->u.isp24.attr << 9) |
5259                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5260                 CTIO7_FLAGS_DONT_RET_CTIO;
5261         ctio24->u.status1.flags = cpu_to_le16(temp);
5262         /*
5263          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5264          * if the explicit conformation is used.
5265          */
5266         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5267         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5268
5269         ctio24->u.status1.residual = get_datalen_for_atio(atio);
5270
5271         if (ctio24->u.status1.residual != 0)
5272                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
5273
5274         /* Memory Barrier */
5275         wmb();
5276         if (qpair->reqq_start_iocbs)
5277                 qpair->reqq_start_iocbs(qpair);
5278         else
5279                 qla2x00_start_iocbs(vha, qpair->req);
5280         return 0;
5281 }
5282
5283 /*
5284  * This routine is used to allocate a command for either a QFull condition
5285  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5286  * out previously.
5287  */
5288 static void
5289 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5290         struct atio_from_isp *atio, uint16_t status, int qfull)
5291 {
5292         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5293         struct qla_hw_data *ha = vha->hw;
5294         struct fc_port *sess;
5295         struct se_session *se_sess;
5296         struct qla_tgt_cmd *cmd;
5297         int tag;
5298         unsigned long flags;
5299
5300         if (unlikely(tgt->tgt_stop)) {
5301                 ql_dbg(ql_dbg_io, vha, 0x300a,
5302                         "New command while device %p is shutting down\n", tgt);
5303                 return;
5304         }
5305
5306         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5307                 vha->hw->tgt.num_qfull_cmds_dropped++;
5308                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5309                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5310                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5311                                 vha->hw->tgt.num_qfull_cmds_dropped;
5312
5313                 ql_dbg(ql_dbg_io, vha, 0x3068,
5314                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5315                         vha->vp_idx, __func__,
5316                         vha->hw->tgt.num_qfull_cmds_dropped);
5317
5318                 qlt_chk_exch_leak_thresh_hold(vha);
5319                 return;
5320         }
5321
5322         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5323                 (vha, atio->u.isp24.fcp_hdr.s_id);
5324         if (!sess)
5325                 return;
5326
5327         se_sess = sess->se_sess;
5328
5329         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5330         if (tag < 0)
5331                 return;
5332
5333         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5334         if (!cmd) {
5335                 ql_dbg(ql_dbg_io, vha, 0x3009,
5336                         "qla_target(%d): %s: Allocation of cmd failed\n",
5337                         vha->vp_idx, __func__);
5338
5339                 vha->hw->tgt.num_qfull_cmds_dropped++;
5340                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5341                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5342                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5343                                 vha->hw->tgt.num_qfull_cmds_dropped;
5344
5345                 qlt_chk_exch_leak_thresh_hold(vha);
5346                 return;
5347         }
5348
5349         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5350
5351         qlt_incr_num_pend_cmds(vha);
5352         INIT_LIST_HEAD(&cmd->cmd_list);
5353         memcpy(&cmd->atio, atio, sizeof(*atio));
5354
5355         cmd->tgt = vha->vha_tgt.qla_tgt;
5356         cmd->vha = vha;
5357         cmd->reset_count = ha->base_qpair->chip_reset;
5358         cmd->q_full = 1;
5359         cmd->qpair = ha->base_qpair;
5360
5361         if (qfull) {
5362                 cmd->q_full = 1;
5363                 /* NOTE: borrowing the state field to carry the status */
5364                 cmd->state = status;
5365         } else
5366                 cmd->term_exchg = 1;
5367
5368         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5369         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5370
5371         vha->hw->tgt.num_qfull_cmds_alloc++;
5372         if (vha->hw->tgt.num_qfull_cmds_alloc >
5373                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5374                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5375                         vha->hw->tgt.num_qfull_cmds_alloc;
5376         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5377 }
5378
5379 int
5380 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5381 {
5382         struct scsi_qla_host *vha = qpair->vha;
5383         struct qla_hw_data *ha = vha->hw;
5384         unsigned long flags;
5385         struct qla_tgt_cmd *cmd, *tcmd;
5386         struct list_head free_list, q_full_list;
5387         int rc = 0;
5388
5389         if (list_empty(&ha->tgt.q_full_list))
5390                 return 0;
5391
5392         INIT_LIST_HEAD(&free_list);
5393         INIT_LIST_HEAD(&q_full_list);
5394
5395         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5396         if (list_empty(&ha->tgt.q_full_list)) {
5397                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5398                 return 0;
5399         }
5400
5401         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5402         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5403
5404         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5405         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5406                 if (cmd->q_full)
5407                         /* cmd->state is a borrowed field to hold status */
5408                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5409                 else if (cmd->term_exchg)
5410                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5411
5412                 if (rc == -ENOMEM)
5413                         break;
5414
5415                 if (cmd->q_full)
5416                         ql_dbg(ql_dbg_io, vha, 0x3006,
5417                             "%s: busy sent for ox_id[%04x]\n", __func__,
5418                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5419                 else if (cmd->term_exchg)
5420                         ql_dbg(ql_dbg_io, vha, 0x3007,
5421                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5422                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5423                 else
5424                         ql_dbg(ql_dbg_io, vha, 0x3008,
5425                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5426                             cmd);
5427
5428                 list_del(&cmd->cmd_list);
5429                 list_add_tail(&cmd->cmd_list, &free_list);
5430
5431                 /* piggy back on hardware_lock for protection */
5432                 vha->hw->tgt.num_qfull_cmds_alloc--;
5433         }
5434         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5435
5436         cmd = NULL;
5437
5438         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5439                 list_del(&cmd->cmd_list);
5440                 /* This cmd was never sent to TCM.  There is no need
5441                  * to schedule free or call free_cmd
5442                  */
5443                 qlt_free_cmd(cmd);
5444         }
5445
5446         if (!list_empty(&q_full_list)) {
5447                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5448                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5449                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5450         }
5451
5452         return rc;
5453 }
5454
5455 static void
5456 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5457     uint16_t status)
5458 {
5459         int rc = 0;
5460         struct scsi_qla_host *vha = qpair->vha;
5461
5462         rc = __qlt_send_busy(qpair, atio, status);
5463         if (rc == -ENOMEM)
5464                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5465 }
5466
5467 static int
5468 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5469         struct atio_from_isp *atio, uint8_t ha_locked)
5470 {
5471         struct qla_hw_data *ha = vha->hw;
5472         unsigned long flags;
5473
5474         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5475                 return 0;
5476
5477         if (!ha_locked)
5478                 spin_lock_irqsave(&ha->hardware_lock, flags);
5479         qlt_send_busy(qpair, atio, qla_sam_status);
5480         if (!ha_locked)
5481                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5482
5483         return 1;
5484 }
5485
5486 /* ha->hardware_lock supposed to be held on entry */
5487 /* called via callback from qla2xxx */
5488 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5489         struct atio_from_isp *atio, uint8_t ha_locked)
5490 {
5491         struct qla_hw_data *ha = vha->hw;
5492         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5493         int rc;
5494         unsigned long flags = 0;
5495
5496         if (unlikely(tgt == NULL)) {
5497                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5498                     "ATIO pkt, but no tgt (ha %p)", ha);
5499                 return;
5500         }
5501         /*
5502          * In tgt_stop mode we also should allow all requests to pass.
5503          * Otherwise, some commands can stuck.
5504          */
5505
5506         tgt->atio_irq_cmd_count++;
5507
5508         switch (atio->u.raw.entry_type) {
5509         case ATIO_TYPE7:
5510                 if (unlikely(atio->u.isp24.exchange_addr ==
5511                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5512                         ql_dbg(ql_dbg_io, vha, 0x3065,
5513                             "qla_target(%d): ATIO_TYPE7 "
5514                             "received with UNKNOWN exchange address, "
5515                             "sending QUEUE_FULL\n", vha->vp_idx);
5516                         if (!ha_locked)
5517                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5518                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5519                         if (!ha_locked)
5520                                 spin_unlock_irqrestore(&ha->hardware_lock,
5521                                     flags);
5522                         break;
5523                 }
5524
5525                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5526                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5527                             atio, ha_locked);
5528                         if (rc != 0) {
5529                                 tgt->atio_irq_cmd_count--;
5530                                 return;
5531                         }
5532                         rc = qlt_handle_cmd_for_atio(vha, atio);
5533                 } else {
5534                         rc = qlt_handle_task_mgmt(vha, atio);
5535                 }
5536                 if (unlikely(rc != 0)) {
5537                         if (!ha_locked)
5538                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5539                         switch (rc) {
5540                         case -ENODEV:
5541                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5542                                     "qla_target: Unable to send command to target\n");
5543                                 break;
5544                         case -EBADF:
5545                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5546                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5547                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5548                                     atio, 1, 0);
5549                                 break;
5550                         case -EBUSY:
5551                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5552                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5553                                     vha->vp_idx);
5554                                 qlt_send_busy(ha->base_qpair, atio,
5555                                     tc_sam_status);
5556                                 break;
5557                         default:
5558                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5559                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5560                                     vha->vp_idx);
5561                                 qlt_send_busy(ha->base_qpair, atio,
5562                                     qla_sam_status);
5563                                 break;
5564                         }
5565                         if (!ha_locked)
5566                                 spin_unlock_irqrestore(&ha->hardware_lock,
5567                                     flags);
5568                 }
5569                 break;
5570
5571         case IMMED_NOTIFY_TYPE:
5572         {
5573                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5574                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5575                             "qla_target(%d): Received ATIO packet %x "
5576                             "with error status %x\n", vha->vp_idx,
5577                             atio->u.raw.entry_type,
5578                             atio->u.isp2x.entry_status);
5579                         break;
5580                 }
5581                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5582
5583                 if (!ha_locked)
5584                         spin_lock_irqsave(&ha->hardware_lock, flags);
5585                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5586                 if (!ha_locked)
5587                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5588                 break;
5589         }
5590
5591         default:
5592                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5593                     "qla_target(%d): Received unknown ATIO atio "
5594                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5595                 break;
5596         }
5597
5598         tgt->atio_irq_cmd_count--;
5599 }
5600
5601 /* ha->hardware_lock supposed to be held on entry */
5602 /* called via callback from qla2xxx */
5603 static void qlt_response_pkt(struct scsi_qla_host *vha,
5604         struct rsp_que *rsp, response_t *pkt)
5605 {
5606         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5607
5608         if (unlikely(tgt == NULL)) {
5609                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5610                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5611                     vha->vp_idx, pkt->entry_type, vha->hw);
5612                 return;
5613         }
5614
5615         /*
5616          * In tgt_stop mode we also should allow all requests to pass.
5617          * Otherwise, some commands can stuck.
5618          */
5619
5620         switch (pkt->entry_type) {
5621         case CTIO_CRC2:
5622         case CTIO_TYPE7:
5623         {
5624                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5625                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5626                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5627                     entry);
5628                 break;
5629         }
5630
5631         case ACCEPT_TGT_IO_TYPE:
5632         {
5633                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5634                 int rc;
5635                 if (atio->u.isp2x.status !=
5636                     cpu_to_le16(ATIO_CDB_VALID)) {
5637                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5638                             "qla_target(%d): ATIO with error "
5639                             "status %x received\n", vha->vp_idx,
5640                             le16_to_cpu(atio->u.isp2x.status));
5641                         break;
5642                 }
5643
5644                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5645                 if (rc != 0)
5646                         return;
5647
5648                 rc = qlt_handle_cmd_for_atio(vha, atio);
5649                 if (unlikely(rc != 0)) {
5650                         switch (rc) {
5651                         case -ENODEV:
5652                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5653                                     "qla_target: Unable to send command to target\n");
5654                                 break;
5655                         case -EBADF:
5656                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5657                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5658                                 qlt_send_term_exchange(rsp->qpair, NULL,
5659                                     atio, 1, 0);
5660                                 break;
5661                         case -EBUSY:
5662                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5663                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5664                                     vha->vp_idx);
5665                                 qlt_send_busy(rsp->qpair, atio,
5666                                     tc_sam_status);
5667                                 break;
5668                         default:
5669                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5670                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5671                                     vha->vp_idx);
5672                                 qlt_send_busy(rsp->qpair, atio,
5673                                     qla_sam_status);
5674                                 break;
5675                         }
5676                 }
5677         }
5678         break;
5679
5680         case CONTINUE_TGT_IO_TYPE:
5681         {
5682                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5683                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5684                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5685                     entry);
5686                 break;
5687         }
5688
5689         case CTIO_A64_TYPE:
5690         {
5691                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5692                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5693                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5694                     entry);
5695                 break;
5696         }
5697
5698         case IMMED_NOTIFY_TYPE:
5699                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5700                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5701                 break;
5702
5703         case NOTIFY_ACK_TYPE:
5704                 if (tgt->notify_ack_expected > 0) {
5705                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5706                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5707                             "NOTIFY_ACK seq %08x status %x\n",
5708                             le16_to_cpu(entry->u.isp2x.seq_id),
5709                             le16_to_cpu(entry->u.isp2x.status));
5710                         tgt->notify_ack_expected--;
5711                         if (entry->u.isp2x.status !=
5712                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5713                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5714                                     "qla_target(%d): NOTIFY_ACK "
5715                                     "failed %x\n", vha->vp_idx,
5716                                     le16_to_cpu(entry->u.isp2x.status));
5717                         }
5718                 } else {
5719                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5720                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5721                             vha->vp_idx);
5722                 }
5723                 break;
5724
5725         case ABTS_RECV_24XX:
5726                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5727                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5728                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5729                 break;
5730
5731         case ABTS_RESP_24XX:
5732                 if (tgt->abts_resp_expected > 0) {
5733                         struct abts_resp_from_24xx_fw *entry =
5734                                 (struct abts_resp_from_24xx_fw *)pkt;
5735                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5736                             "ABTS_RESP_24XX: compl_status %x\n",
5737                             entry->compl_status);
5738                         tgt->abts_resp_expected--;
5739                         if (le16_to_cpu(entry->compl_status) !=
5740                             ABTS_RESP_COMPL_SUCCESS) {
5741                                 if ((entry->error_subcode1 == 0x1E) &&
5742                                     (entry->error_subcode2 == 0)) {
5743                                         /*
5744                                          * We've got a race here: aborted
5745                                          * exchange not terminated, i.e.
5746                                          * response for the aborted command was
5747                                          * sent between the abort request was
5748                                          * received and processed.
5749                                          * Unfortunately, the firmware has a
5750                                          * silly requirement that all aborted
5751                                          * exchanges must be explicitely
5752                                          * terminated, otherwise it refuses to
5753                                          * send responses for the abort
5754                                          * requests. So, we have to
5755                                          * (re)terminate the exchange and retry
5756                                          * the abort response.
5757                                          */
5758                                         qlt_24xx_retry_term_exchange(vha,
5759                                             entry);
5760                                 } else
5761                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5762                                             "qla_target(%d): ABTS_RESP_24XX "
5763                                             "failed %x (subcode %x:%x)",
5764                                             vha->vp_idx, entry->compl_status,
5765                                             entry->error_subcode1,
5766                                             entry->error_subcode2);
5767                         }
5768                 } else {
5769                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5770                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5771                             "received\n", vha->vp_idx);
5772                 }
5773                 break;
5774
5775         default:
5776                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5777                     "qla_target(%d): Received unknown response pkt "
5778                     "type %x\n", vha->vp_idx, pkt->entry_type);
5779                 break;
5780         }
5781
5782 }
5783
5784 /*
5785  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5786  */
5787 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5788         uint16_t *mailbox)
5789 {
5790         struct qla_hw_data *ha = vha->hw;
5791         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5792         int login_code;
5793
5794         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5795                 return;
5796
5797         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5798             IS_QLA2100(ha))
5799                 return;
5800         /*
5801          * In tgt_stop mode we also should allow all requests to pass.
5802          * Otherwise, some commands can stuck.
5803          */
5804
5805
5806         switch (code) {
5807         case MBA_RESET:                 /* Reset */
5808         case MBA_SYSTEM_ERR:            /* System Error */
5809         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5810         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5811                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5812                     "qla_target(%d): System error async event %#x "
5813                     "occurred", vha->vp_idx, code);
5814                 break;
5815         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5816                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5817                 break;
5818
5819         case MBA_LOOP_UP:
5820         {
5821                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5822                     "qla_target(%d): Async LOOP_UP occurred "
5823                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5824                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5825                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5826                 if (tgt->link_reinit_iocb_pending) {
5827                         qlt_send_notify_ack(ha->base_qpair,
5828                             (void *)&tgt->link_reinit_iocb,
5829                             0, 0, 0, 0, 0, 0);
5830                         tgt->link_reinit_iocb_pending = 0;
5831                 }
5832                 break;
5833         }
5834
5835         case MBA_LIP_OCCURRED:
5836         case MBA_LOOP_DOWN:
5837         case MBA_LIP_RESET:
5838         case MBA_RSCN_UPDATE:
5839                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5840                     "qla_target(%d): Async event %#x occurred "
5841                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5842                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5843                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5844                 break;
5845
5846         case MBA_REJECTED_FCP_CMD:
5847                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5848                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5849                     vha->vp_idx,
5850                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5851                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5852
5853                 if (le16_to_cpu(mailbox[3]) == 1) {
5854                         /* exchange starvation. */
5855                         vha->hw->exch_starvation++;
5856                         if (vha->hw->exch_starvation > 5) {
5857                                 ql_log(ql_log_warn, vha, 0xd03a,
5858                                     "Exchange starvation-. Resetting RISC\n");
5859
5860                                 vha->hw->exch_starvation = 0;
5861                                 if (IS_P3P_TYPE(vha->hw))
5862                                         set_bit(FCOE_CTX_RESET_NEEDED,
5863                                             &vha->dpc_flags);
5864                                 else
5865                                         set_bit(ISP_ABORT_NEEDED,
5866                                             &vha->dpc_flags);
5867                                 qla2xxx_wake_dpc(vha);
5868                         }
5869                 }
5870                 break;
5871
5872         case MBA_PORT_UPDATE:
5873                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5874                     "qla_target(%d): Port update async event %#x "
5875                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5876                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5877                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5878                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5879
5880                 login_code = le16_to_cpu(mailbox[2]);
5881                 if (login_code == 0x4) {
5882                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5883                             "Async MB 2: Got PLOGI Complete\n");
5884                         vha->hw->exch_starvation = 0;
5885                 } else if (login_code == 0x7)
5886                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5887                             "Async MB 2: Port Logged Out\n");
5888                 break;
5889         default:
5890                 break;
5891         }
5892
5893 }
5894
5895 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5896         uint16_t loop_id)
5897 {
5898         fc_port_t *fcport, *tfcp, *del;
5899         int rc;
5900         unsigned long flags;
5901         u8 newfcport = 0;
5902
5903         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
5904         if (!fcport) {
5905                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5906                     "qla_target(%d): Allocation of tmp FC port failed",
5907                     vha->vp_idx);
5908                 return NULL;
5909         }
5910
5911         fcport->loop_id = loop_id;
5912
5913         rc = qla24xx_gpdb_wait(vha, fcport, 0);
5914         if (rc != QLA_SUCCESS) {
5915                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5916                     "qla_target(%d): Failed to retrieve fcport "
5917                     "information -- get_port_database() returned %x "
5918                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5919                 kfree(fcport);
5920                 return NULL;
5921         }
5922
5923         del = NULL;
5924         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5925         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5926
5927         if (tfcp) {
5928                 tfcp->d_id = fcport->d_id;
5929                 tfcp->port_type = fcport->port_type;
5930                 tfcp->supported_classes = fcport->supported_classes;
5931                 tfcp->flags |= fcport->flags;
5932                 tfcp->scan_state = QLA_FCPORT_FOUND;
5933
5934                 del = fcport;
5935                 fcport = tfcp;
5936         } else {
5937                 if (vha->hw->current_topology == ISP_CFG_F)
5938                         fcport->flags |= FCF_FABRIC_DEVICE;
5939
5940                 list_add_tail(&fcport->list, &vha->vp_fcports);
5941                 if (!IS_SW_RESV_ADDR(fcport->d_id))
5942                    vha->fcport_count++;
5943                 fcport->login_gen++;
5944                 fcport->disc_state = DSC_LOGIN_COMPLETE;
5945                 fcport->login_succ = 1;
5946                 newfcport = 1;
5947         }
5948
5949         fcport->deleted = 0;
5950         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
5951
5952         switch (vha->host->active_mode) {
5953         case MODE_INITIATOR:
5954         case MODE_DUAL:
5955                 if (newfcport) {
5956                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5957                                 ql_dbg(ql_dbg_disc, vha, 0x20fe,
5958                                    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
5959                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5960                                 qla24xx_post_upd_fcport_work(vha, fcport);
5961                         } else {
5962                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
5963                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
5964                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5965                                 qla24xx_post_gpsc_work(vha, fcport);
5966                         }
5967                 }
5968                 break;
5969
5970         case MODE_TARGET:
5971         default:
5972                 break;
5973         }
5974         if (del)
5975                 qla2x00_free_fcport(del);
5976
5977         return fcport;
5978 }
5979
5980 /* Must be called under tgt_mutex */
5981 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5982         uint8_t *s_id)
5983 {
5984         struct fc_port *sess = NULL;
5985         fc_port_t *fcport = NULL;
5986         int rc, global_resets;
5987         uint16_t loop_id = 0;
5988
5989         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
5990                 /*
5991                  * This is Domain Controller, so it should be
5992                  * OK to drop SCSI commands from it.
5993                  */
5994                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5995                     "Unable to find initiator with S_ID %x:%x:%x",
5996                     s_id[0], s_id[1], s_id[2]);
5997                 return NULL;
5998         }
5999
6000         mutex_lock(&vha->vha_tgt.tgt_mutex);
6001
6002 retry:
6003         global_resets =
6004             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6005
6006         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6007         if (rc != 0) {
6008                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6009
6010                 ql_log(ql_log_info, vha, 0xf071,
6011                     "qla_target(%d): Unable to find "
6012                     "initiator with S_ID %x:%x:%x",
6013                     vha->vp_idx, s_id[0], s_id[1],
6014                     s_id[2]);
6015
6016                 if (rc == -ENOENT) {
6017                         qlt_port_logo_t logo;
6018                         sid_to_portid(s_id, &logo.id);
6019                         logo.cmd_count = 1;
6020                         qlt_send_first_logo(vha, &logo);
6021                 }
6022
6023                 return NULL;
6024         }
6025
6026         fcport = qlt_get_port_database(vha, loop_id);
6027         if (!fcport) {
6028                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6029                 return NULL;
6030         }
6031
6032         if (global_resets !=
6033             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6034                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6035                     "qla_target(%d): global reset during session discovery "
6036                     "(counter was %d, new %d), retrying", vha->vp_idx,
6037                     global_resets,
6038                     atomic_read(&vha->vha_tgt.
6039                         qla_tgt->tgt_global_resets_count));
6040                 goto retry;
6041         }
6042
6043         sess = qlt_create_sess(vha, fcport, true);
6044
6045         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6046
6047         return sess;
6048 }
6049
6050 static void qlt_abort_work(struct qla_tgt *tgt,
6051         struct qla_tgt_sess_work_param *prm)
6052 {
6053         struct scsi_qla_host *vha = tgt->vha;
6054         struct qla_hw_data *ha = vha->hw;
6055         struct fc_port *sess = NULL;
6056         unsigned long flags = 0, flags2 = 0;
6057         uint32_t be_s_id;
6058         uint8_t s_id[3];
6059         int rc;
6060
6061         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6062
6063         if (tgt->tgt_stop)
6064                 goto out_term2;
6065
6066         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
6067         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
6068         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
6069
6070         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
6071             (unsigned char *)&be_s_id);
6072         if (!sess) {
6073                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6074
6075                 sess = qlt_make_local_sess(vha, s_id);
6076                 /* sess has got an extra creation ref */
6077
6078                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6079                 if (!sess)
6080                         goto out_term2;
6081         } else {
6082                 if (sess->deleted) {
6083                         sess = NULL;
6084                         goto out_term2;
6085                 }
6086
6087                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6088                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6089                             "%s: kref_get fail %8phC \n",
6090                              __func__, sess->port_name);
6091                         sess = NULL;
6092                         goto out_term2;
6093                 }
6094         }
6095
6096         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6097         ha->tgt.tgt_ops->put_sess(sess);
6098         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6099
6100         if (rc != 0)
6101                 goto out_term;
6102         return;
6103
6104 out_term2:
6105         if (sess)
6106                 ha->tgt.tgt_ops->put_sess(sess);
6107         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6108
6109 out_term:
6110         spin_lock_irqsave(&ha->hardware_lock, flags);
6111         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6112             FCP_TMF_REJECTED, false);
6113         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6114 }
6115
6116 static void qlt_tmr_work(struct qla_tgt *tgt,
6117         struct qla_tgt_sess_work_param *prm)
6118 {
6119         struct atio_from_isp *a = &prm->tm_iocb2;
6120         struct scsi_qla_host *vha = tgt->vha;
6121         struct qla_hw_data *ha = vha->hw;
6122         struct fc_port *sess = NULL;
6123         unsigned long flags;
6124         uint8_t *s_id = NULL; /* to hide compiler warnings */
6125         int rc;
6126         u64 unpacked_lun;
6127         int fn;
6128         void *iocb;
6129
6130         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6131
6132         if (tgt->tgt_stop)
6133                 goto out_term2;
6134
6135         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6136         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6137         if (!sess) {
6138                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6139
6140                 sess = qlt_make_local_sess(vha, s_id);
6141                 /* sess has got an extra creation ref */
6142
6143                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6144                 if (!sess)
6145                         goto out_term2;
6146         } else {
6147                 if (sess->deleted) {
6148                         sess = NULL;
6149                         goto out_term2;
6150                 }
6151
6152                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6153                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6154                             "%s: kref_get fail %8phC\n",
6155                              __func__, sess->port_name);
6156                         sess = NULL;
6157                         goto out_term2;
6158                 }
6159         }
6160
6161         iocb = a;
6162         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6163         unpacked_lun =
6164             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6165
6166         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6167         ha->tgt.tgt_ops->put_sess(sess);
6168         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6169
6170         if (rc != 0)
6171                 goto out_term;
6172         return;
6173
6174 out_term2:
6175         if (sess)
6176                 ha->tgt.tgt_ops->put_sess(sess);
6177         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6178 out_term:
6179         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6180 }
6181
6182 static void qlt_sess_work_fn(struct work_struct *work)
6183 {
6184         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6185         struct scsi_qla_host *vha = tgt->vha;
6186         unsigned long flags;
6187
6188         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6189
6190         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6191         while (!list_empty(&tgt->sess_works_list)) {
6192                 struct qla_tgt_sess_work_param *prm = list_entry(
6193                     tgt->sess_works_list.next, typeof(*prm),
6194                     sess_works_list_entry);
6195
6196                 /*
6197                  * This work can be scheduled on several CPUs at time, so we
6198                  * must delete the entry to eliminate double processing
6199                  */
6200                 list_del(&prm->sess_works_list_entry);
6201
6202                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6203
6204                 switch (prm->type) {
6205                 case QLA_TGT_SESS_WORK_ABORT:
6206                         qlt_abort_work(tgt, prm);
6207                         break;
6208                 case QLA_TGT_SESS_WORK_TM:
6209                         qlt_tmr_work(tgt, prm);
6210                         break;
6211                 default:
6212                         BUG_ON(1);
6213                         break;
6214                 }
6215
6216                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6217
6218                 kfree(prm);
6219         }
6220         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6221 }
6222
6223 /* Must be called under tgt_host_action_mutex */
6224 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6225 {
6226         struct qla_tgt *tgt;
6227         int rc, i;
6228         struct qla_qpair_hint *h;
6229
6230         if (!QLA_TGT_MODE_ENABLED())
6231                 return 0;
6232
6233         if (!IS_TGT_MODE_CAPABLE(ha)) {
6234                 ql_log(ql_log_warn, base_vha, 0xe070,
6235                     "This adapter does not support target mode.\n");
6236                 return 0;
6237         }
6238
6239         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6240             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6241
6242         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6243
6244         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6245         if (!tgt) {
6246                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6247                     "Unable to allocate struct qla_tgt\n");
6248                 return -ENOMEM;
6249         }
6250
6251         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6252                                sizeof(struct qla_qpair_hint),
6253                                GFP_KERNEL);
6254         if (!tgt->qphints) {
6255                 kfree(tgt);
6256                 ql_log(ql_log_warn, base_vha, 0x0197,
6257                     "Unable to allocate qpair hints.\n");
6258                 return -ENOMEM;
6259         }
6260
6261         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6262                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6263
6264         rc = btree_init64(&tgt->lun_qpair_map);
6265         if (rc) {
6266                 kfree(tgt->qphints);
6267                 kfree(tgt);
6268                 ql_log(ql_log_info, base_vha, 0x0198,
6269                         "Unable to initialize lun_qpair_map btree\n");
6270                 return -EIO;
6271         }
6272         h = &tgt->qphints[0];
6273         h->qpair = ha->base_qpair;
6274         INIT_LIST_HEAD(&h->hint_elem);
6275         h->cpuid = ha->base_qpair->cpuid;
6276         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6277
6278         for (i = 0; i < ha->max_qpairs; i++) {
6279                 unsigned long flags;
6280
6281                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6282                 h = &tgt->qphints[i + 1];
6283                 INIT_LIST_HEAD(&h->hint_elem);
6284                 if (qpair) {
6285                         h->qpair = qpair;
6286                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6287                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6288                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6289                         h->cpuid = qpair->cpuid;
6290                 }
6291         }
6292
6293         tgt->ha = ha;
6294         tgt->vha = base_vha;
6295         init_waitqueue_head(&tgt->waitQ);
6296         INIT_LIST_HEAD(&tgt->del_sess_list);
6297         spin_lock_init(&tgt->sess_work_lock);
6298         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6299         INIT_LIST_HEAD(&tgt->sess_works_list);
6300         atomic_set(&tgt->tgt_global_resets_count, 0);
6301
6302         base_vha->vha_tgt.qla_tgt = tgt;
6303
6304         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6305                 "qla_target(%d): using 64 Bit PCI addressing",
6306                 base_vha->vp_idx);
6307         /* 3 is reserved */
6308         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6309
6310         mutex_lock(&qla_tgt_mutex);
6311         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6312         mutex_unlock(&qla_tgt_mutex);
6313
6314         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6315                 ha->tgt.tgt_ops->add_target(base_vha);
6316
6317         return 0;
6318 }
6319
6320 /* Must be called under tgt_host_action_mutex */
6321 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6322 {
6323         if (!vha->vha_tgt.qla_tgt)
6324                 return 0;
6325
6326         if (vha->fc_vport) {
6327                 qlt_release(vha->vha_tgt.qla_tgt);
6328                 return 0;
6329         }
6330
6331         /* free left over qfull cmds */
6332         qlt_init_term_exchange(vha);
6333
6334         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6335             vha->host_no, ha);
6336         qlt_release(vha->vha_tgt.qla_tgt);
6337
6338         return 0;
6339 }
6340
6341 void qlt_remove_target_resources(struct qla_hw_data *ha)
6342 {
6343         struct scsi_qla_host *node;
6344         u32 key = 0;
6345
6346         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6347                 btree_remove32(&ha->tgt.host_map, key);
6348
6349         btree_destroy32(&ha->tgt.host_map);
6350 }
6351
6352 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6353         unsigned char *b)
6354 {
6355         int i;
6356
6357         pr_debug("qla2xxx HW vha->node_name: ");
6358         for (i = 0; i < WWN_SIZE; i++)
6359                 pr_debug("%02x ", vha->node_name[i]);
6360         pr_debug("\n");
6361         pr_debug("qla2xxx HW vha->port_name: ");
6362         for (i = 0; i < WWN_SIZE; i++)
6363                 pr_debug("%02x ", vha->port_name[i]);
6364         pr_debug("\n");
6365
6366         pr_debug("qla2xxx passed configfs WWPN: ");
6367         put_unaligned_be64(wwpn, b);
6368         for (i = 0; i < WWN_SIZE; i++)
6369                 pr_debug("%02x ", b[i]);
6370         pr_debug("\n");
6371 }
6372
6373 /**
6374  * qla_tgt_lport_register - register lport with external module
6375  *
6376  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6377  * @phys_wwpn:
6378  * @npiv_wwpn:
6379  * @npiv_wwnn:
6380  * @callback:  lport initialization callback for tcm_qla2xxx code
6381  */
6382 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6383                        u64 npiv_wwpn, u64 npiv_wwnn,
6384                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6385 {
6386         struct qla_tgt *tgt;
6387         struct scsi_qla_host *vha;
6388         struct qla_hw_data *ha;
6389         struct Scsi_Host *host;
6390         unsigned long flags;
6391         int rc;
6392         u8 b[WWN_SIZE];
6393
6394         mutex_lock(&qla_tgt_mutex);
6395         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6396                 vha = tgt->vha;
6397                 ha = vha->hw;
6398
6399                 host = vha->host;
6400                 if (!host)
6401                         continue;
6402
6403                 if (!(host->hostt->supported_mode & MODE_TARGET))
6404                         continue;
6405
6406                 spin_lock_irqsave(&ha->hardware_lock, flags);
6407                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6408                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6409                             host->host_no);
6410                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6411                         continue;
6412                 }
6413                 if (tgt->tgt_stop) {
6414                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6415                                  host->host_no);
6416                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6417                         continue;
6418                 }
6419                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6420
6421                 if (!scsi_host_get(host)) {
6422                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6423                             "Unable to scsi_host_get() for"
6424                             " qla2xxx scsi_host\n");
6425                         continue;
6426                 }
6427                 qlt_lport_dump(vha, phys_wwpn, b);
6428
6429                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6430                         scsi_host_put(host);
6431                         continue;
6432                 }
6433                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6434                 if (rc != 0)
6435                         scsi_host_put(host);
6436
6437                 mutex_unlock(&qla_tgt_mutex);
6438                 return rc;
6439         }
6440         mutex_unlock(&qla_tgt_mutex);
6441
6442         return -ENODEV;
6443 }
6444 EXPORT_SYMBOL(qlt_lport_register);
6445
6446 /**
6447  * qla_tgt_lport_deregister - Degister lport
6448  *
6449  * @vha:  Registered scsi_qla_host pointer
6450  */
6451 void qlt_lport_deregister(struct scsi_qla_host *vha)
6452 {
6453         struct qla_hw_data *ha = vha->hw;
6454         struct Scsi_Host *sh = vha->host;
6455         /*
6456          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6457          */
6458         vha->vha_tgt.target_lport_ptr = NULL;
6459         ha->tgt.tgt_ops = NULL;
6460         /*
6461          * Release the Scsi_Host reference for the underlying qla2xxx host
6462          */
6463         scsi_host_put(sh);
6464 }
6465 EXPORT_SYMBOL(qlt_lport_deregister);
6466
6467 /* Must be called under HW lock */
6468 static void qlt_set_mode(struct scsi_qla_host *vha)
6469 {
6470         switch (ql2x_ini_mode) {
6471         case QLA2XXX_INI_MODE_DISABLED:
6472         case QLA2XXX_INI_MODE_EXCLUSIVE:
6473                 vha->host->active_mode = MODE_TARGET;
6474                 break;
6475         case QLA2XXX_INI_MODE_ENABLED:
6476                 vha->host->active_mode = MODE_UNKNOWN;
6477                 break;
6478         case QLA2XXX_INI_MODE_DUAL:
6479                 vha->host->active_mode = MODE_DUAL;
6480                 break;
6481         default:
6482                 break;
6483         }
6484 }
6485
6486 /* Must be called under HW lock */
6487 static void qlt_clear_mode(struct scsi_qla_host *vha)
6488 {
6489         switch (ql2x_ini_mode) {
6490         case QLA2XXX_INI_MODE_DISABLED:
6491                 vha->host->active_mode = MODE_UNKNOWN;
6492                 break;
6493         case QLA2XXX_INI_MODE_EXCLUSIVE:
6494                 vha->host->active_mode = MODE_INITIATOR;
6495                 break;
6496         case QLA2XXX_INI_MODE_ENABLED:
6497         case QLA2XXX_INI_MODE_DUAL:
6498                 vha->host->active_mode = MODE_INITIATOR;
6499                 break;
6500         default:
6501                 break;
6502         }
6503 }
6504
6505 /*
6506  * qla_tgt_enable_vha - NO LOCK HELD
6507  *
6508  * host_reset, bring up w/ Target Mode Enabled
6509  */
6510 void
6511 qlt_enable_vha(struct scsi_qla_host *vha)
6512 {
6513         struct qla_hw_data *ha = vha->hw;
6514         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6515         unsigned long flags;
6516         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6517
6518         if (!tgt) {
6519                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6520                     "Unable to locate qla_tgt pointer from"
6521                     " struct qla_hw_data\n");
6522                 dump_stack();
6523                 return;
6524         }
6525
6526         spin_lock_irqsave(&ha->hardware_lock, flags);
6527         tgt->tgt_stopped = 0;
6528         qlt_set_mode(vha);
6529         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6530
6531         if (vha->vp_idx) {
6532                 qla24xx_disable_vp(vha);
6533                 qla24xx_enable_vp(vha);
6534         } else {
6535                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6536                 qla2xxx_wake_dpc(base_vha);
6537                 qla2x00_wait_for_hba_online(base_vha);
6538         }
6539 }
6540 EXPORT_SYMBOL(qlt_enable_vha);
6541
6542 /*
6543  * qla_tgt_disable_vha - NO LOCK HELD
6544  *
6545  * Disable Target Mode and reset the adapter
6546  */
6547 static void qlt_disable_vha(struct scsi_qla_host *vha)
6548 {
6549         struct qla_hw_data *ha = vha->hw;
6550         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6551         unsigned long flags;
6552
6553         if (!tgt) {
6554                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6555                     "Unable to locate qla_tgt pointer from"
6556                     " struct qla_hw_data\n");
6557                 dump_stack();
6558                 return;
6559         }
6560
6561         spin_lock_irqsave(&ha->hardware_lock, flags);
6562         qlt_clear_mode(vha);
6563         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6564
6565         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6566         qla2xxx_wake_dpc(vha);
6567         qla2x00_wait_for_hba_online(vha);
6568 }
6569
6570 /*
6571  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6572  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6573  * members.
6574  */
6575 void
6576 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6577 {
6578         vha->vha_tgt.qla_tgt = NULL;
6579
6580         mutex_init(&vha->vha_tgt.tgt_mutex);
6581         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6582
6583         qlt_clear_mode(vha);
6584
6585         /*
6586          * NOTE: Currently the value is kept the same for <24xx and
6587          * >=24xx ISPs. If it is necessary to change it,
6588          * the check should be added for specific ISPs,
6589          * assigning the value appropriately.
6590          */
6591         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6592
6593         qlt_add_target(ha, vha);
6594 }
6595
6596 u8
6597 qlt_rff_id(struct scsi_qla_host *vha)
6598 {
6599         u8 fc4_feature = 0;
6600         /*
6601          * FC-4 Feature bit 0 indicates target functionality to the name server.
6602          */
6603         if (qla_tgt_mode_enabled(vha)) {
6604                 fc4_feature = BIT_0;
6605         } else if (qla_ini_mode_enabled(vha)) {
6606                 fc4_feature = BIT_1;
6607         } else if (qla_dual_mode_enabled(vha))
6608                 fc4_feature = BIT_0 | BIT_1;
6609
6610         return fc4_feature;
6611 }
6612
6613 /*
6614  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6615  * @ha: HA context
6616  *
6617  * Beginning of ATIO ring has initialization control block already built
6618  * by nvram config routine.
6619  *
6620  * Returns 0 on success.
6621  */
6622 void
6623 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6624 {
6625         struct qla_hw_data *ha = vha->hw;
6626         uint16_t cnt;
6627         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6628
6629         if (qla_ini_mode_enabled(vha))
6630                 return;
6631
6632         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6633                 pkt->u.raw.signature = ATIO_PROCESSED;
6634                 pkt++;
6635         }
6636
6637 }
6638
6639 /*
6640  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6641  * @ha: SCSI driver HA context
6642  */
6643 void
6644 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6645 {
6646         struct qla_hw_data *ha = vha->hw;
6647         struct atio_from_isp *pkt;
6648         int cnt, i;
6649
6650         if (!ha->flags.fw_started)
6651                 return;
6652
6653         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6654             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6655                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6656                 cnt = pkt->u.raw.entry_count;
6657
6658                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6659                         /*
6660                          * This packet is corrupted. The header + payload
6661                          * can not be trusted. There is no point in passing
6662                          * it further up.
6663                          */
6664                         ql_log(ql_log_warn, vha, 0xd03c,
6665                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6666                             pkt->u.isp24.fcp_hdr.s_id,
6667                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6668                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6669
6670                         adjust_corrupted_atio(pkt);
6671                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6672                             ha_locked, 0);
6673                 } else {
6674                         qlt_24xx_atio_pkt_all_vps(vha,
6675                             (struct atio_from_isp *)pkt, ha_locked);
6676                 }
6677
6678                 for (i = 0; i < cnt; i++) {
6679                         ha->tgt.atio_ring_index++;
6680                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6681                                 ha->tgt.atio_ring_index = 0;
6682                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6683                         } else
6684                                 ha->tgt.atio_ring_ptr++;
6685
6686                         pkt->u.raw.signature = ATIO_PROCESSED;
6687                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6688                 }
6689                 wmb();
6690         }
6691
6692         /* Adjust ring index */
6693         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6694 }
6695
6696 void
6697 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6698 {
6699         struct qla_hw_data *ha = vha->hw;
6700         struct qla_msix_entry *msix = &ha->msix_entries[2];
6701         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6702
6703         if (!QLA_TGT_MODE_ENABLED())
6704                 return;
6705
6706         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6707         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6708         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6709
6710         if (ha->flags.msix_enabled) {
6711                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6712                         if (IS_QLA2071(ha)) {
6713                                 /* 4 ports Baker: Enable Interrupt Handshake */
6714                                 icb->msix_atio = 0;
6715                                 icb->firmware_options_2 |= BIT_26;
6716                         } else {
6717                                 icb->msix_atio = cpu_to_le16(msix->entry);
6718                                 icb->firmware_options_2 &= ~BIT_26;
6719                         }
6720                         ql_dbg(ql_dbg_init, vha, 0xf072,
6721                             "Registering ICB vector 0x%x for atio que.\n",
6722                             msix->entry);
6723                 }
6724         } else {
6725                 /* INTx|MSI */
6726                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6727                         icb->msix_atio = 0;
6728                         icb->firmware_options_2 |= BIT_26;
6729                         ql_dbg(ql_dbg_init, vha, 0xf072,
6730                             "%s: Use INTx for ATIOQ.\n", __func__);
6731                 }
6732         }
6733 }
6734
6735 void
6736 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6737 {
6738         struct qla_hw_data *ha = vha->hw;
6739         u32 tmp;
6740
6741         if (!QLA_TGT_MODE_ENABLED())
6742                 return;
6743
6744         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6745                 if (!ha->tgt.saved_set) {
6746                         /* We save only once */
6747                         ha->tgt.saved_exchange_count = nv->exchange_count;
6748                         ha->tgt.saved_firmware_options_1 =
6749                             nv->firmware_options_1;
6750                         ha->tgt.saved_firmware_options_2 =
6751                             nv->firmware_options_2;
6752                         ha->tgt.saved_firmware_options_3 =
6753                             nv->firmware_options_3;
6754                         ha->tgt.saved_set = 1;
6755                 }
6756
6757                 if (qla_tgt_mode_enabled(vha))
6758                         nv->exchange_count = cpu_to_le16(0xFFFF);
6759                 else                    /* dual */
6760                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6761
6762                 /* Enable target mode */
6763                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6764
6765                 /* Disable ini mode, if requested */
6766                 if (qla_tgt_mode_enabled(vha))
6767                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6768
6769                 /* Disable Full Login after LIP */
6770                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6771                 /* Enable initial LIP */
6772                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6773                 if (ql2xtgt_tape_enable)
6774                         /* Enable FC Tape support */
6775                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6776                 else
6777                         /* Disable FC Tape support */
6778                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6779
6780                 /* Disable Full Login after LIP */
6781                 nv->host_p &= cpu_to_le32(~BIT_10);
6782
6783                 /*
6784                  * clear BIT 15 explicitly as we have seen at least
6785                  * a couple of instances where this was set and this
6786                  * was causing the firmware to not be initialized.
6787                  */
6788                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6789                 /* Enable target PRLI control */
6790                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6791
6792                 if (IS_QLA25XX(ha)) {
6793                         /* Change Loop-prefer to Pt-Pt */
6794                         tmp = ~(BIT_4|BIT_5|BIT_6);
6795                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6796                         tmp = P2P << 4;
6797                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6798                 }
6799         } else {
6800                 if (ha->tgt.saved_set) {
6801                         nv->exchange_count = ha->tgt.saved_exchange_count;
6802                         nv->firmware_options_1 =
6803                             ha->tgt.saved_firmware_options_1;
6804                         nv->firmware_options_2 =
6805                             ha->tgt.saved_firmware_options_2;
6806                         nv->firmware_options_3 =
6807                             ha->tgt.saved_firmware_options_3;
6808                 }
6809                 return;
6810         }
6811
6812         if (ha->base_qpair->enable_class_2) {
6813                 if (vha->flags.init_done)
6814                         fc_host_supported_classes(vha->host) =
6815                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6816
6817                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6818         } else {
6819                 if (vha->flags.init_done)
6820                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6821
6822                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6823         }
6824 }
6825
6826 void
6827 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6828         struct init_cb_24xx *icb)
6829 {
6830         struct qla_hw_data *ha = vha->hw;
6831
6832         if (!QLA_TGT_MODE_ENABLED())
6833                 return;
6834
6835         if (ha->tgt.node_name_set) {
6836                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6837                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6838         }
6839
6840         /* disable ZIO at start time. */
6841         if (!vha->flags.init_done) {
6842                 uint32_t tmp;
6843                 tmp = le32_to_cpu(icb->firmware_options_2);
6844                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6845                 icb->firmware_options_2 = cpu_to_le32(tmp);
6846         }
6847 }
6848
6849 void
6850 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6851 {
6852         struct qla_hw_data *ha = vha->hw;
6853         u32 tmp;
6854
6855         if (!QLA_TGT_MODE_ENABLED())
6856                 return;
6857
6858         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6859                 if (!ha->tgt.saved_set) {
6860                         /* We save only once */
6861                         ha->tgt.saved_exchange_count = nv->exchange_count;
6862                         ha->tgt.saved_firmware_options_1 =
6863                             nv->firmware_options_1;
6864                         ha->tgt.saved_firmware_options_2 =
6865                             nv->firmware_options_2;
6866                         ha->tgt.saved_firmware_options_3 =
6867                             nv->firmware_options_3;
6868                         ha->tgt.saved_set = 1;
6869                 }
6870
6871                 if (qla_tgt_mode_enabled(vha))
6872                         nv->exchange_count = cpu_to_le16(0xFFFF);
6873                 else                    /* dual */
6874                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6875
6876                 /* Enable target mode */
6877                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6878
6879                 /* Disable ini mode, if requested */
6880                 if (qla_tgt_mode_enabled(vha))
6881                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6882                 /* Disable Full Login after LIP */
6883                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6884                 /* Enable initial LIP */
6885                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6886                 /*
6887                  * clear BIT 15 explicitly as we have seen at
6888                  * least a couple of instances where this was set
6889                  * and this was causing the firmware to not be
6890                  * initialized.
6891                  */
6892                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6893                 if (ql2xtgt_tape_enable)
6894                         /* Enable FC tape support */
6895                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6896                 else
6897                         /* Disable FC tape support */
6898                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6899
6900                 /* Disable Full Login after LIP */
6901                 nv->host_p &= cpu_to_le32(~BIT_10);
6902                 /* Enable target PRLI control */
6903                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6904
6905                 /* Change Loop-prefer to Pt-Pt */
6906                 tmp = ~(BIT_4|BIT_5|BIT_6);
6907                 nv->firmware_options_2 &= cpu_to_le32(tmp);
6908                 tmp = P2P << 4;
6909                 nv->firmware_options_2 |= cpu_to_le32(tmp);
6910         } else {
6911                 if (ha->tgt.saved_set) {
6912                         nv->exchange_count = ha->tgt.saved_exchange_count;
6913                         nv->firmware_options_1 =
6914                             ha->tgt.saved_firmware_options_1;
6915                         nv->firmware_options_2 =
6916                             ha->tgt.saved_firmware_options_2;
6917                         nv->firmware_options_3 =
6918                             ha->tgt.saved_firmware_options_3;
6919                 }
6920                 return;
6921         }
6922
6923         if (ha->base_qpair->enable_class_2) {
6924                 if (vha->flags.init_done)
6925                         fc_host_supported_classes(vha->host) =
6926                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6927
6928                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6929         } else {
6930                 if (vha->flags.init_done)
6931                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6932
6933                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6934         }
6935 }
6936
6937 void
6938 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6939         struct init_cb_81xx *icb)
6940 {
6941         struct qla_hw_data *ha = vha->hw;
6942
6943         if (!QLA_TGT_MODE_ENABLED())
6944                 return;
6945
6946         if (ha->tgt.node_name_set) {
6947                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6948                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6949         }
6950
6951         /* disable ZIO at start time. */
6952         if (!vha->flags.init_done) {
6953                 uint32_t tmp;
6954                 tmp = le32_to_cpu(icb->firmware_options_2);
6955                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6956                 icb->firmware_options_2 = cpu_to_le32(tmp);
6957         }
6958
6959 }
6960
6961 void
6962 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6963 {
6964         if (!QLA_TGT_MODE_ENABLED())
6965                 return;
6966
6967         ha->msix_count += 1; /* For ATIO Q */
6968 }
6969
6970
6971 void
6972 qlt_modify_vp_config(struct scsi_qla_host *vha,
6973         struct vp_config_entry_24xx *vpmod)
6974 {
6975         /* enable target mode.  Bit5 = 1 => disable */
6976         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6977                 vpmod->options_idx1 &= ~BIT_5;
6978
6979         /* Disable ini mode, if requested.  bit4 = 1 => disable */
6980         if (qla_tgt_mode_enabled(vha))
6981                 vpmod->options_idx1 &= ~BIT_4;
6982 }
6983
6984 void
6985 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6986 {
6987         int rc;
6988
6989         if (!QLA_TGT_MODE_ENABLED())
6990                 return;
6991
6992         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6993                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6994                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6995         } else {
6996                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6997                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6998         }
6999
7000         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7001         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7002
7003         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7004         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7005             qlt_unknown_atio_work_fn);
7006
7007         qlt_clear_mode(base_vha);
7008
7009         rc = btree_init32(&ha->tgt.host_map);
7010         if (rc)
7011                 ql_log(ql_log_info, base_vha, 0xd03d,
7012                     "Unable to initialize ha->host_map btree\n");
7013
7014         qlt_update_vp_map(base_vha, SET_VP_IDX);
7015 }
7016
7017 irqreturn_t
7018 qla83xx_msix_atio_q(int irq, void *dev_id)
7019 {
7020         struct rsp_que *rsp;
7021         scsi_qla_host_t *vha;
7022         struct qla_hw_data *ha;
7023         unsigned long flags;
7024
7025         rsp = (struct rsp_que *) dev_id;
7026         ha = rsp->hw;
7027         vha = pci_get_drvdata(ha->pdev);
7028
7029         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7030
7031         qlt_24xx_process_atio_queue(vha, 0);
7032
7033         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7034
7035         return IRQ_HANDLED;
7036 }
7037
7038 static void
7039 qlt_handle_abts_recv_work(struct work_struct *work)
7040 {
7041         struct qla_tgt_sess_op *op = container_of(work,
7042                 struct qla_tgt_sess_op, work);
7043         scsi_qla_host_t *vha = op->vha;
7044         struct qla_hw_data *ha = vha->hw;
7045         unsigned long flags;
7046
7047         if (qla2x00_reset_active(vha) ||
7048             (op->chip_reset != ha->base_qpair->chip_reset))
7049                 return;
7050
7051         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7052         qlt_24xx_process_atio_queue(vha, 0);
7053         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7054
7055         spin_lock_irqsave(&ha->hardware_lock, flags);
7056         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7057         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7058
7059         kfree(op);
7060 }
7061
7062 void
7063 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7064     response_t *pkt)
7065 {
7066         struct qla_tgt_sess_op *op;
7067
7068         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7069
7070         if (!op) {
7071                 /* do not reach for ATIO queue here.  This is best effort err
7072                  * recovery at this point.
7073                  */
7074                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7075                 return;
7076         }
7077
7078         memcpy(&op->atio, pkt, sizeof(*pkt));
7079         op->vha = vha;
7080         op->chip_reset = vha->hw->base_qpair->chip_reset;
7081         op->rsp = rsp;
7082         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7083         queue_work(qla_tgt_wq, &op->work);
7084         return;
7085 }
7086
7087 int
7088 qlt_mem_alloc(struct qla_hw_data *ha)
7089 {
7090         if (!QLA_TGT_MODE_ENABLED())
7091                 return 0;
7092
7093         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7094                                      sizeof(struct qla_tgt_vp_map),
7095                                      GFP_KERNEL);
7096         if (!ha->tgt.tgt_vp_map)
7097                 return -ENOMEM;
7098
7099         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7100             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7101             &ha->tgt.atio_dma, GFP_KERNEL);
7102         if (!ha->tgt.atio_ring) {
7103                 kfree(ha->tgt.tgt_vp_map);
7104                 return -ENOMEM;
7105         }
7106         return 0;
7107 }
7108
7109 void
7110 qlt_mem_free(struct qla_hw_data *ha)
7111 {
7112         if (!QLA_TGT_MODE_ENABLED())
7113                 return;
7114
7115         if (ha->tgt.atio_ring) {
7116                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7117                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7118                     ha->tgt.atio_dma);
7119         }
7120         kfree(ha->tgt.tgt_vp_map);
7121 }
7122
7123 /* vport_slock to be held by the caller */
7124 void
7125 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7126 {
7127         void *slot;
7128         u32 key;
7129         int rc;
7130
7131         if (!QLA_TGT_MODE_ENABLED())
7132                 return;
7133
7134         key = vha->d_id.b24;
7135
7136         switch (cmd) {
7137         case SET_VP_IDX:
7138                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7139                 break;
7140         case SET_AL_PA:
7141                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7142                 if (!slot) {
7143                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7144                             "Save vha in host_map %p %06x\n", vha, key);
7145                         rc = btree_insert32(&vha->hw->tgt.host_map,
7146                                 key, vha, GFP_ATOMIC);
7147                         if (rc)
7148                                 ql_log(ql_log_info, vha, 0xd03e,
7149                                     "Unable to insert s_id into host_map: %06x\n",
7150                                     key);
7151                         return;
7152                 }
7153                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7154                     "replace existing vha in host_map %p %06x\n", vha, key);
7155                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7156                 break;
7157         case RESET_VP_IDX:
7158                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7159                 break;
7160         case RESET_AL_PA:
7161                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7162                    "clear vha in host_map %p %06x\n", vha, key);
7163                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7164                 if (slot)
7165                         btree_remove32(&vha->hw->tgt.host_map, key);
7166                 vha->d_id.b24 = 0;
7167                 break;
7168         }
7169 }
7170
7171 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7172 {
7173
7174         if (!vha->d_id.b24) {
7175                 vha->d_id = id;
7176                 qlt_update_vp_map(vha, SET_AL_PA);
7177         } else if (vha->d_id.b24 != id.b24) {
7178                 qlt_update_vp_map(vha, RESET_AL_PA);
7179                 vha->d_id = id;
7180                 qlt_update_vp_map(vha, SET_AL_PA);
7181         }
7182 }
7183
7184 static int __init qlt_parse_ini_mode(void)
7185 {
7186         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7187                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7188         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7189                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7190         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7191                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7192         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7193                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7194         else
7195                 return false;
7196
7197         return true;
7198 }
7199
7200 int __init qlt_init(void)
7201 {
7202         int ret;
7203
7204         if (!qlt_parse_ini_mode()) {
7205                 ql_log(ql_log_fatal, NULL, 0xe06b,
7206                     "qlt_parse_ini_mode() failed\n");
7207                 return -EINVAL;
7208         }
7209
7210         if (!QLA_TGT_MODE_ENABLED())
7211                 return 0;
7212
7213         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7214             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7215             qla_tgt_mgmt_cmd), 0, NULL);
7216         if (!qla_tgt_mgmt_cmd_cachep) {
7217                 ql_log(ql_log_fatal, NULL, 0xd04b,
7218                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7219                 return -ENOMEM;
7220         }
7221
7222         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7223             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7224             0, NULL);
7225
7226         if (!qla_tgt_plogi_cachep) {
7227                 ql_log(ql_log_fatal, NULL, 0xe06d,
7228                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7229                 ret = -ENOMEM;
7230                 goto out_mgmt_cmd_cachep;
7231         }
7232
7233         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7234             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7235         if (!qla_tgt_mgmt_cmd_mempool) {
7236                 ql_log(ql_log_fatal, NULL, 0xe06e,
7237                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7238                 ret = -ENOMEM;
7239                 goto out_plogi_cachep;
7240         }
7241
7242         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7243         if (!qla_tgt_wq) {
7244                 ql_log(ql_log_fatal, NULL, 0xe06f,
7245                     "alloc_workqueue for qla_tgt_wq failed\n");
7246                 ret = -ENOMEM;
7247                 goto out_cmd_mempool;
7248         }
7249         /*
7250          * Return 1 to signal that initiator-mode is being disabled
7251          */
7252         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7253
7254 out_cmd_mempool:
7255         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7256 out_plogi_cachep:
7257         kmem_cache_destroy(qla_tgt_plogi_cachep);
7258 out_mgmt_cmd_cachep:
7259         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7260         return ret;
7261 }
7262
7263 void qlt_exit(void)
7264 {
7265         if (!QLA_TGT_MODE_ENABLED())
7266                 return;
7267
7268         destroy_workqueue(qla_tgt_wq);
7269         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7270         kmem_cache_destroy(qla_tgt_plogi_cachep);
7271         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7272 }