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 temp_sam_status = SAM_STAT_BUSY;
  79
  80 /*
  81  * From scsi/fc/fc_fcp.h
  82  */
  83 enum fcp_resp_rsp_codes {
  84         FCP_TMF_CMPL = 0,
  85         FCP_DATA_LEN_INVALID = 1,
  86         FCP_CMND_FIELDS_INVALID = 2,
  87         FCP_DATA_PARAM_MISMATCH = 3,
  88         FCP_TMF_REJECTED = 4,
  89         FCP_TMF_FAILED = 5,
  90         FCP_TMF_INVALID_LUN = 9,
  91 };
  92
  93 /*
  94  * fc_pri_ta from scsi/fc/fc_fcp.h
  95  */
  96 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  97 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  98 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  99 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
 100 #define FCP_PTA_MASK        7   /* mask for task attribute field */
 101 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
 102 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
 103
 104 /*
 105  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
 106  * must be called under HW lock and could unlock/lock it inside.
 107  * It isn't an issue, since in the current implementation on the time when
 108  * those functions are called:
 109  *
 110  *   - Either context is IRQ and only IRQ handler can modify HW data,
 111  *     including rings related fields,
 112  *
 113  *   - Or access to target mode variables from struct qla_tgt doesn't
 114  *     cross those functions boundaries, except tgt_stop, which
 115  *     additionally protected by irq_cmd_count.
 116  */
 117 /* Predefs for callbacks handed to qla2xxx LLD */
 118 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 119         struct atio_from_isp *pkt, uint8_t);
 120 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 121         response_t *pkt);
 122 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 123         int fn, void *iocb, int flags);
 124 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 125         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 126 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 127         struct atio_from_isp *atio, uint16_t status, int qfull);
 128 static void qlt_disable_vha(struct scsi_qla_host *vha);
 129 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 130 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 131         struct imm_ntfy_from_isp *ntfy,
 132         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 133         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 134 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 135         struct imm_ntfy_from_isp *imm, int ha_locked);
 136 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 137         fc_port_t *fcport, bool local);
 138 void qlt_unreg_sess(struct fc_port *sess);
 139 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 140         struct abts_recv_from_24xx *);
 141 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 142     uint16_t);
 143
 144 /*
 145  * Global Variables
 146  */
 147 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 148 struct kmem_cache *qla_tgt_plogi_cachep;
 149 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 150 static struct workqueue_struct *qla_tgt_wq;
 151 static DEFINE_MUTEX(qla_tgt_mutex);
 152 static LIST_HEAD(qla_tgt_glist);
 153
 154 static const char *prot_op_str(u32 prot_op)
 155 {
 156         switch (prot_op) {
 157         case TARGET_PROT_NORMAL:        return "NORMAL";
 158         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 159         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 160         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 161         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 162         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 163         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 164         default:                        return "UNKNOWN";
 165         }
 166 }
 167
 168 /* This API intentionally takes dest as a parameter, rather than returning
 169  * int value to avoid caller forgetting to issue wmb() after the store */
 170 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 171 {
 172         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 173         *dest = atomic_inc_return(&base_vha->generation_tick);
 174         /* memory barrier */
 175         wmb();
 176 }
 177
 178 /* Might release hw lock, then reaquire!! */
 179 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 180 {
 181         /* Send marker if required */
 182         if (unlikely(vha->marker_needed != 0)) {
 183                 int rc = qla2x00_issue_marker(vha, vha_locked);
 184                 if (rc != QLA_SUCCESS) {
 185                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 186                             "qla_target(%d): issue_marker() failed\n",
 187                             vha->vp_idx);
 188                 }
 189                 return rc;
 190         }
 191         return QLA_SUCCESS;
 192 }
 193
 194 static inline
 195 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 196         uint8_t *d_id)
 197 {
 198         struct scsi_qla_host *host;
 199         uint32_t key = 0;
 200
 201         if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
 202             (vha->d_id.b.al_pa == d_id[2]))
 203                 return vha;
 204
 205         key  = (uint32_t)d_id[0] << 16;
 206         key |= (uint32_t)d_id[1] <<  8;
 207         key |= (uint32_t)d_id[2];
 208
 209         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 210         if (!host)
 211                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 212                     "Unable to find host %06x\n", key);
 213
 214         return host;
 215 }
 216
 217 static inline
 218 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 219         uint16_t vp_idx)
 220 {
 221         struct qla_hw_data *ha = vha->hw;
 222
 223         if (vha->vp_idx == vp_idx)
 224                 return vha;
 225
 226         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 227         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 228                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 229
 230         return NULL;
 231 }
 232
 233 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 234 {
 235         unsigned long flags;
 236
 237         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 238
 239         vha->hw->tgt.num_pend_cmds++;
 240         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 241                 vha->qla_stats.stat_max_pend_cmds =
 242                         vha->hw->tgt.num_pend_cmds;
 243         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 244 }
 245 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 246 {
 247         unsigned long flags;
 248
 249         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 250         vha->hw->tgt.num_pend_cmds--;
 251         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 252 }
 253
 254
 255 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 256         struct atio_from_isp *atio, uint8_t ha_locked)
 257 {
 258         struct qla_tgt_sess_op *u;
 259         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 260         unsigned long flags;
 261
 262         if (tgt->tgt_stop) {
 263                 ql_dbg(ql_dbg_async, vha, 0x502c,
 264                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 265                     vha->vp_idx);
 266                 goto out_term;
 267         }
 268
 269         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 270         if (u == NULL)
 271                 goto out_term;
 272
 273         u->vha = vha;
 274         memcpy(&u->atio, atio, sizeof(*atio));
 275         INIT_LIST_HEAD(&u->cmd_list);
 276
 277         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 278         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 279         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 280
 281         schedule_delayed_work(&vha->unknown_atio_work, 1);
 282
 283 out:
 284         return;
 285
 286 out_term:
 287         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 288         goto out;
 289 }
 290
 291 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 292         uint8_t ha_locked)
 293 {
 294         struct qla_tgt_sess_op *u, *t;
 295         scsi_qla_host_t *host;
 296         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 297         unsigned long flags;
 298         uint8_t queued = 0;
 299
 300         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 301                 if (u->aborted) {
 302                         ql_dbg(ql_dbg_async, vha, 0x502e,
 303                             "Freeing unknown %s %p, because of Abort\n",
 304                             "ATIO_TYPE7", u);
 305                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 306                             &u->atio, ha_locked, 0);
 307                         goto abort;
 308                 }
 309
 310                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 311                 if (host != NULL) {
 312                         ql_dbg(ql_dbg_async, vha, 0x502f,
 313                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 314                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 315                 } else if (tgt->tgt_stop) {
 316                         ql_dbg(ql_dbg_async, vha, 0x503a,
 317                             "Freeing unknown %s %p, because tgt is being stopped\n",
 318                             "ATIO_TYPE7", u);
 319                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 320                             &u->atio, ha_locked, 0);
 321                 } else {
 322                         ql_dbg(ql_dbg_async, vha, 0x503d,
 323                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 324                         if (!queued) {
 325                                 queued = 1;
 326                                 schedule_delayed_work(&vha->unknown_atio_work,
 327                                     1);
 328                         }
 329                         continue;
 330                 }
 331
 332 abort:
 333                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 334                 list_del(&u->cmd_list);
 335                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 336                 kfree(u);
 337         }
 338 }
 339
 340 void qlt_unknown_atio_work_fn(struct work_struct *work)
 341 {
 342         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 343             struct scsi_qla_host, unknown_atio_work);
 344
 345         qlt_try_to_dequeue_unknown_atios(vha, 0);
 346 }
 347
 348 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 349         struct atio_from_isp *atio, uint8_t ha_locked)
 350 {
 351         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 352                 "%s: qla_target(%d): type %x ox_id %04x\n",
 353                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 354                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 355
 356         switch (atio->u.raw.entry_type) {
 357         case ATIO_TYPE7:
 358         {
 359                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 360                     atio->u.isp24.fcp_hdr.d_id);
 361                 if (unlikely(NULL == host)) {
 362                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 363                             "qla_target(%d): Received ATIO_TYPE7 "
 364                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 365                             atio->u.isp24.fcp_hdr.d_id[0],
 366                             atio->u.isp24.fcp_hdr.d_id[1],
 367                             atio->u.isp24.fcp_hdr.d_id[2]);
 368
 369
 370                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 371                         break;
 372                 }
 373                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 374                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 375
 376                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 377                 break;
 378         }
 379
 380         case IMMED_NOTIFY_TYPE:
 381         {
 382                 struct scsi_qla_host *host = vha;
 383                 struct imm_ntfy_from_isp *entry =
 384                     (struct imm_ntfy_from_isp *)atio;
 385
 386                 qlt_issue_marker(vha, ha_locked);
 387
 388                 if ((entry->u.isp24.vp_index != 0xFF) &&
 389                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 390                         host = qlt_find_host_by_vp_idx(vha,
 391                             entry->u.isp24.vp_index);
 392                         if (unlikely(!host)) {
 393                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 394                                     "qla_target(%d): Received "
 395                                     "ATIO (IMMED_NOTIFY_TYPE) "
 396                                     "with unknown vp_index %d\n",
 397                                     vha->vp_idx, entry->u.isp24.vp_index);
 398                                 break;
 399                         }
 400                 }
 401                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 402                 break;
 403         }
 404
 405         case VP_RPT_ID_IOCB_TYPE:
 406                 qla24xx_report_id_acquisition(vha,
 407                         (struct vp_rpt_id_entry_24xx *)atio);
 408                 break;
 409
 410         case ABTS_RECV_24XX:
 411         {
 412                 struct abts_recv_from_24xx *entry =
 413                         (struct abts_recv_from_24xx *)atio;
 414                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 415                         entry->vp_index);
 416                 unsigned long flags;
 417
 418                 if (unlikely(!host)) {
 419                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 420                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 421                             "received, with unknown vp_index %d\n",
 422                             vha->vp_idx, entry->vp_index);
 423                         break;
 424                 }
 425                 if (!ha_locked)
 426                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 427                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 428                 if (!ha_locked)
 429                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 430                 break;
 431         }
 432
 433         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 434
 435         default:
 436                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 437                     "qla_target(%d): Received unknown ATIO atio "
 438                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 439                 break;
 440         }
 441
 442         return false;
 443 }
 444
 445 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 446         struct rsp_que *rsp, response_t *pkt)
 447 {
 448         switch (pkt->entry_type) {
 449         case CTIO_CRC2:
 450                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 451                         "qla_target(%d):%s: CRC2 Response pkt\n",
 452                         vha->vp_idx, __func__);
 453         case CTIO_TYPE7:
 454         {
 455                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 456                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 457                     entry->vp_index);
 458                 if (unlikely(!host)) {
 459                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 460                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 461                             "received, with unknown vp_index %d\n",
 462                             vha->vp_idx, entry->vp_index);
 463                         break;
 464                 }
 465                 qlt_response_pkt(host, rsp, pkt);
 466                 break;
 467         }
 468
 469         case IMMED_NOTIFY_TYPE:
 470         {
 471                 struct scsi_qla_host *host = vha;
 472                 struct imm_ntfy_from_isp *entry =
 473                     (struct imm_ntfy_from_isp *)pkt;
 474
 475                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 476                 if (unlikely(!host)) {
 477                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 478                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 479                             "received, with unknown vp_index %d\n",
 480                             vha->vp_idx, entry->u.isp24.vp_index);
 481                         break;
 482                 }
 483                 qlt_response_pkt(host, rsp, pkt);
 484                 break;
 485         }
 486
 487         case NOTIFY_ACK_TYPE:
 488         {
 489                 struct scsi_qla_host *host = vha;
 490                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 491
 492                 if (0xFF != entry->u.isp24.vp_index) {
 493                         host = qlt_find_host_by_vp_idx(vha,
 494                             entry->u.isp24.vp_index);
 495                         if (unlikely(!host)) {
 496                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 497                                     "qla_target(%d): Response "
 498                                     "pkt (NOTIFY_ACK_TYPE) "
 499                                     "received, with unknown "
 500                                     "vp_index %d\n", vha->vp_idx,
 501                                     entry->u.isp24.vp_index);
 502                                 break;
 503                         }
 504                 }
 505                 qlt_response_pkt(host, rsp, pkt);
 506                 break;
 507         }
 508
 509         case ABTS_RECV_24XX:
 510         {
 511                 struct abts_recv_from_24xx *entry =
 512                     (struct abts_recv_from_24xx *)pkt;
 513                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 514                     entry->vp_index);
 515                 if (unlikely(!host)) {
 516                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 517                             "qla_target(%d): Response pkt "
 518                             "(ABTS_RECV_24XX) received, with unknown "
 519                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 520                         break;
 521                 }
 522                 qlt_response_pkt(host, rsp, pkt);
 523                 break;
 524         }
 525
 526         case ABTS_RESP_24XX:
 527         {
 528                 struct abts_resp_to_24xx *entry =
 529                     (struct abts_resp_to_24xx *)pkt;
 530                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 531                     entry->vp_index);
 532                 if (unlikely(!host)) {
 533                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 534                             "qla_target(%d): Response pkt "
 535                             "(ABTS_RECV_24XX) received, with unknown "
 536                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 537                         break;
 538                 }
 539                 qlt_response_pkt(host, rsp, pkt);
 540                 break;
 541         }
 542
 543         default:
 544                 qlt_response_pkt(vha, rsp, pkt);
 545                 break;
 546         }
 547
 548 }
 549
 550 /*
 551  * All qlt_plogi_ack_t operations are protected by hardware_lock
 552  */
 553 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 554         struct imm_ntfy_from_isp *ntfy, int type)
 555 {
 556         struct qla_work_evt *e;
 557         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 558         if (!e)
 559                 return QLA_FUNCTION_FAILED;
 560
 561         e->u.nack.fcport = fcport;
 562         e->u.nack.type = type;
 563         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 564         return qla2x00_post_work(vha, e);
 565 }
 566
 567 static
 568 void qla2x00_async_nack_sp_done(void *s, int res)
 569 {
 570         struct srb *sp = (struct srb *)s;
 571         struct scsi_qla_host *vha = sp->vha;
 572         unsigned long flags;
 573
 574         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 575             "Async done-%s res %x %8phC  type %d\n",
 576             sp->name, res, sp->fcport->port_name, sp->type);
 577
 578         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 579         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 580         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 581
 582         switch (sp->type) {
 583         case SRB_NACK_PLOGI:
 584                 sp->fcport->login_gen++;
 585                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 586                 sp->fcport->logout_on_delete = 1;
 587                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 588                 sp->fcport->send_els_logo = 0;
 589                 break;
 590
 591         case SRB_NACK_PRLI:
 592                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 593                 sp->fcport->deleted = 0;
 594                 sp->fcport->send_els_logo = 0;
 595
 596                 if (!sp->fcport->login_succ &&
 597                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 598                         sp->fcport->login_succ = 1;
 599
 600                         vha->fcport_count++;
 601
 602                         if (!IS_IIDMA_CAPABLE(vha->hw) ||
 603                             !vha->hw->flags.gpsc_supported) {
 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
 610                                 qla24xx_post_upd_fcport_work(vha, sp->fcport);
 611                         } else {
 612                                 ql_dbg(ql_dbg_disc, vha, 0x20f5,
 613                                     "%s %d %8phC post gpsc fcp_cnt %d\n",
 614                                     __func__, __LINE__,
 615                                     sp->fcport->port_name,
 616                                     vha->fcport_count);
 617
 618                                 qla24xx_post_gpsc_work(vha, sp->fcport);
 619                         }
 620                 }
 621                 break;
 622
 623         case SRB_NACK_LOGO:
 624                 sp->fcport->login_gen++;
 625                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 626                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 627                 break;
 628         }
 629         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 630
 631         sp->free(sp);
 632 }
 633
 634 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 635         struct imm_ntfy_from_isp *ntfy, int type)
 636 {
 637         int rval = QLA_FUNCTION_FAILED;
 638         srb_t *sp;
 639         char *c = NULL;
 640
 641         fcport->flags |= FCF_ASYNC_SENT;
 642         switch (type) {
 643         case SRB_NACK_PLOGI:
 644                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 645                 c = "PLOGI";
 646                 break;
 647         case SRB_NACK_PRLI:
 648                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 649                 fcport->deleted = 0;
 650                 c = "PRLI";
 651                 break;
 652         case SRB_NACK_LOGO:
 653                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 654                 c = "LOGO";
 655                 break;
 656         }
 657
 658         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 659         if (!sp)
 660                 goto done;
 661
 662         sp->type = type;
 663         sp->name = "nack";
 664
 665         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 666
 667         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 668         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 669         sp->done = qla2x00_async_nack_sp_done;
 670
 671         rval = qla2x00_start_sp(sp);
 672         if (rval != QLA_SUCCESS)
 673                 goto done_free_sp;
 674
 675         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 676             "Async-%s %8phC hndl %x %s\n",
 677             sp->name, fcport->port_name, sp->handle, c);
 678
 679         return rval;
 680
 681 done_free_sp:
 682         sp->free(sp);
 683 done:
 684         fcport->flags &= ~FCF_ASYNC_SENT;
 685         return rval;
 686 }
 687
 688 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 689 {
 690         fc_port_t *t;
 691         unsigned long flags;
 692
 693         switch (e->u.nack.type) {
 694         case SRB_NACK_PRLI:
 695                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 696                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 697                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 698                 if (t) {
 699                         ql_log(ql_log_info, vha, 0xd034,
 700                             "%s create sess success %p", __func__, t);
 701                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 702                         /* create sess has an extra kref */
 703                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 704                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 705                 }
 706                 break;
 707         }
 708         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 709             (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
 710 }
 711
 712 void qla24xx_delete_sess_fn(struct work_struct *work)
 713 {
 714         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 715         struct qla_hw_data *ha = fcport->vha->hw;
 716         unsigned long flags;
 717
 718         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 719
 720         if (fcport->se_sess) {
 721                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 722                 ha->tgt.tgt_ops->put_sess(fcport);
 723         } else {
 724                 qlt_unreg_sess(fcport);
 725         }
 726         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 727 }
 728
 729 /*
 730  * Called from qla2x00_reg_remote_port()
 731  */
 732 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 733 {
 734         struct qla_hw_data *ha = vha->hw;
 735         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 736         struct fc_port *sess = fcport;
 737         unsigned long flags;
 738
 739         if (!vha->hw->tgt.tgt_ops)
 740                 return;
 741
 742         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 743         if (tgt->tgt_stop) {
 744                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 745                 return;
 746         }
 747
 748         if (fcport->disc_state == DSC_DELETE_PEND) {
 749                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 750                 return;
 751         }
 752
 753         if (!sess->se_sess) {
 754                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 755
 756                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 757                 sess = qlt_create_sess(vha, fcport, false);
 758                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 759
 760                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 761         } else {
 762                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 763                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 764                         return;
 765                 }
 766
 767                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 768                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 769                             "%s: kref_get fail sess %8phC \n",
 770                             __func__, sess->port_name);
 771                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 772                         return;
 773                 }
 774
 775                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 776                     "qla_target(%u): %ssession for port %8phC "
 777                     "(loop ID %d) reappeared\n", vha->vp_idx,
 778                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 779
 780                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 781                     "Reappeared sess %p\n", sess);
 782
 783                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 784                     fcport->loop_id,
 785                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 786         }
 787
 788         if (sess && sess->local) {
 789                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 790                     "qla_target(%u): local session for "
 791                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 792                     fcport->port_name, sess->loop_id);
 793                 sess->local = 0;
 794         }
 795         ha->tgt.tgt_ops->put_sess(sess);
 796         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 797 }
 798
 799 /*
 800  * This is a zero-base ref-counting solution, since hardware_lock
 801  * guarantees that ref_count is not modified concurrently.
 802  * Upon successful return content of iocb is undefined
 803  */
 804 static struct qlt_plogi_ack_t *
 805 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 806                        struct imm_ntfy_from_isp *iocb)
 807 {
 808         struct qlt_plogi_ack_t *pla;
 809
 810         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 811                 if (pla->id.b24 == id->b24) {
 812                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 813                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 814                         return pla;
 815                 }
 816         }
 817
 818         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 819         if (!pla) {
 820                 ql_dbg(ql_dbg_async, vha, 0x5088,
 821                        "qla_target(%d): Allocation of plogi_ack failed\n",
 822                        vha->vp_idx);
 823                 return NULL;
 824         }
 825
 826         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 827         pla->id = *id;
 828         list_add_tail(&pla->list, &vha->plogi_ack_list);
 829
 830         return pla;
 831 }
 832
 833 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 834     struct qlt_plogi_ack_t *pla)
 835 {
 836         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 837         port_id_t port_id;
 838         uint16_t loop_id;
 839         fc_port_t *fcport = pla->fcport;
 840
 841         BUG_ON(!pla->ref_count);
 842         pla->ref_count--;
 843
 844         if (pla->ref_count)
 845                 return;
 846
 847         ql_dbg(ql_dbg_disc, vha, 0x5089,
 848             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 849             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 850             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 851             iocb->u.isp24.port_id[0],
 852             le16_to_cpu(iocb->u.isp24.nport_handle),
 853             iocb->u.isp24.exchange_address, iocb->ox_id);
 854
 855         port_id.b.domain = iocb->u.isp24.port_id[2];
 856         port_id.b.area   = iocb->u.isp24.port_id[1];
 857         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 858         port_id.b.rsvd_1 = 0;
 859
 860         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 861
 862         fcport->loop_id = loop_id;
 863         fcport->d_id = port_id;
 864         qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 865
 866         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 867                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 868                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 869                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 870                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 871         }
 872
 873         list_del(&pla->list);
 874         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 875 }
 876
 877 void
 878 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 879     struct fc_port *sess, enum qlt_plogi_link_t link)
 880 {
 881         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 882         /* Inc ref_count first because link might already be pointing at pla */
 883         pla->ref_count++;
 884
 885         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 886                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 887                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 888                 sess, link, sess->port_name,
 889                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 890                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 891                 pla->ref_count, pla, link);
 892
 893         if (sess->plogi_link[link])
 894                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 895
 896         if (link == QLT_PLOGI_LINK_SAME_WWN)
 897                 pla->fcport = sess;
 898
 899         sess->plogi_link[link] = pla;
 900 }
 901
 902 typedef struct {
 903         /* These fields must be initialized by the caller */
 904         port_id_t id;
 905         /*
 906          * number of cmds dropped while we were waiting for
 907          * initiator to ack LOGO initialize to 1 if LOGO is
 908          * triggered by a command, otherwise, to 0
 909          */
 910         int cmd_count;
 911
 912         /* These fields are used by callee */
 913         struct list_head list;
 914 } qlt_port_logo_t;
 915
 916 static void
 917 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 918 {
 919         qlt_port_logo_t *tmp;
 920         int res;
 921
 922         mutex_lock(&vha->vha_tgt.tgt_mutex);
 923
 924         list_for_each_entry(tmp, &vha->logo_list, list) {
 925                 if (tmp->id.b24 == logo->id.b24) {
 926                         tmp->cmd_count += logo->cmd_count;
 927                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 928                         return;
 929                 }
 930         }
 931
 932         list_add_tail(&logo->list, &vha->logo_list);
 933
 934         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 935
 936         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 937
 938         mutex_lock(&vha->vha_tgt.tgt_mutex);
 939         list_del(&logo->list);
 940         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 941
 942         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 943             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 944             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 945             logo->cmd_count, res);
 946 }
 947
 948 static void qlt_free_session_done(struct work_struct *work)
 949 {
 950         struct fc_port *sess = container_of(work, struct fc_port,
 951             free_work);
 952         struct qla_tgt *tgt = sess->tgt;
 953         struct scsi_qla_host *vha = sess->vha;
 954         struct qla_hw_data *ha = vha->hw;
 955         unsigned long flags;
 956         bool logout_started = false;
 957         struct event_arg ea;
 958         scsi_qla_host_t *base_vha;
 959
 960         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 961                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 962                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 963                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 964                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 965                 sess->logout_on_delete, sess->keep_nport_handle,
 966                 sess->send_els_logo);
 967
 968         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 969                 if (sess->send_els_logo) {
 970                         qlt_port_logo_t logo;
 971
 972                         logo.id = sess->d_id;
 973                         logo.cmd_count = 0;
 974                         sess->send_els_logo = 0;
 975                         qlt_send_first_logo(vha, &logo);
 976                 }
 977
 978                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 979                         int rc;
 980
 981                         rc = qla2x00_post_async_logout_work(vha, sess, NULL);
 982                         if (rc != QLA_SUCCESS)
 983                                 ql_log(ql_log_warn, vha, 0xf085,
 984                                     "Schedule logo failed sess %p rc %d\n",
 985                                     sess, rc);
 986                         else
 987                                 logout_started = true;
 988                 }
 989         }
 990
 991         /*
 992          * Release the target session for FC Nexus from fabric module code.
 993          */
 994         if (sess->se_sess != NULL)
 995                 ha->tgt.tgt_ops->free_session(sess);
 996
 997         if (logout_started) {
 998                 bool traced = false;
 999                 u16 cnt = 0;
1000
1001                 while (!ACCESS_ONCE(sess->logout_completed)) {
1002                         if (!traced) {
1003                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1004                                         "%s: waiting for sess %p logout\n",
1005                                         __func__, sess);
1006                                 traced = true;
1007                         }
1008                         msleep(100);
1009                         cnt++;
1010                         if (cnt > 200)
1011                                 break;
1012                 }
1013
1014                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1015                     "%s: sess %p logout completed\n",__func__, sess);
1016         }
1017
1018         if (sess->logo_ack_needed) {
1019                 sess->logo_ack_needed = 0;
1020                 qla24xx_async_notify_ack(vha, sess,
1021                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1022         }
1023
1024         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1025         if (sess->se_sess) {
1026                 sess->se_sess = NULL;
1027                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1028                         tgt->sess_count--;
1029         }
1030
1031         sess->disc_state = DSC_DELETED;
1032         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1033         sess->deleted = QLA_SESS_DELETED;
1034         sess->login_retry = vha->hw->login_retry_count;
1035
1036         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1037                 vha->fcport_count--;
1038                 sess->login_succ = 0;
1039         }
1040
1041         qla2x00_clear_loop_id(sess);
1042
1043         if (sess->conflict) {
1044                 sess->conflict->login_pause = 0;
1045                 sess->conflict = NULL;
1046                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1047                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1048         }
1049
1050         {
1051                 struct qlt_plogi_ack_t *own =
1052                     sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1053                 struct qlt_plogi_ack_t *con =
1054                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1055                 struct imm_ntfy_from_isp *iocb;
1056
1057                 if (con) {
1058                         iocb = &con->iocb;
1059                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1060                                  "se_sess %p / sess %p port %8phC is gone,"
1061                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1062                                  sess->se_sess, sess, sess->port_name,
1063                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1064                                  own ? own->ref_count : -1,
1065                                  iocb->u.isp24.port_name, con->ref_count);
1066                         qlt_plogi_ack_unref(vha, con);
1067                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1068                 } else {
1069                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1070                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1071                             sess->se_sess, sess, sess->port_name,
1072                             own ? "releasing own PLOGI" :
1073                             "no own PLOGI pending",
1074                             own ? own->ref_count : -1);
1075                 }
1076
1077                 if (own) {
1078                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1079                         qlt_plogi_ack_unref(vha, own);
1080                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1081                 }
1082         }
1083         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1084
1085         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1086             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1087                 sess, sess->port_name, vha->fcport_count);
1088
1089         if (tgt && (tgt->sess_count == 0))
1090                 wake_up_all(&tgt->waitQ);
1091
1092         if (vha->fcport_count == 0)
1093                 wake_up_all(&vha->fcport_waitQ);
1094
1095         base_vha = pci_get_drvdata(ha->pdev);
1096         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1097                 return;
1098
1099         if (!tgt || !tgt->tgt_stop) {
1100                 memset(&ea, 0, sizeof(ea));
1101                 ea.event = FCME_DELETE_DONE;
1102                 ea.fcport = sess;
1103                 qla2x00_fcport_event_handler(vha, &ea);
1104         }
1105 }
1106
1107 /* ha->tgt.sess_lock supposed to be held on entry */
1108 void qlt_unreg_sess(struct fc_port *sess)
1109 {
1110         struct scsi_qla_host *vha = sess->vha;
1111
1112         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1113             "%s sess %p for deletion %8phC\n",
1114             __func__, sess, sess->port_name);
1115
1116         if (sess->se_sess)
1117                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1118
1119         qla2x00_mark_device_lost(vha, sess, 1, 1);
1120
1121         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1122         sess->disc_state = DSC_DELETE_PEND;
1123         sess->last_rscn_gen = sess->rscn_gen;
1124         sess->last_login_gen = sess->login_gen;
1125
1126         if (sess->nvme_flag & NVME_FLAG_REGISTERED)
1127                 schedule_work(&sess->nvme_del_work);
1128
1129         INIT_WORK(&sess->free_work, qlt_free_session_done);
1130         schedule_work(&sess->free_work);
1131 }
1132 EXPORT_SYMBOL(qlt_unreg_sess);
1133
1134 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1135 {
1136         struct qla_hw_data *ha = vha->hw;
1137         struct fc_port *sess = NULL;
1138         uint16_t loop_id;
1139         int res = 0;
1140         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1141         unsigned long flags;
1142
1143         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1144         if (loop_id == 0xFFFF) {
1145                 /* Global event */
1146                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1147                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1148                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1149                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1150         } else {
1151                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1152                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1153                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1154         }
1155
1156         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1157             "Using sess for qla_tgt_reset: %p\n", sess);
1158         if (!sess) {
1159                 res = -ESRCH;
1160                 return res;
1161         }
1162
1163         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1164             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1165             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1166             mcmd, loop_id);
1167
1168         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1169 }
1170
1171 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1172 {
1173         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1174                 sess->logout_on_delete = 0;
1175                 sess->logo_ack_needed = 0;
1176                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1177                 sess->scan_state = 0;
1178         }
1179 }
1180
1181 /* ha->tgt.sess_lock supposed to be held on entry */
1182 void qlt_schedule_sess_for_deletion(struct fc_port *sess,
1183         bool immediate)
1184 {
1185         struct qla_tgt *tgt = sess->tgt;
1186
1187         if (sess->disc_state == DSC_DELETE_PEND)
1188                 return;
1189
1190         if (sess->disc_state == DSC_DELETED) {
1191                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1192                         wake_up_all(&tgt->waitQ);
1193                 if (sess->vha->fcport_count == 0)
1194                         wake_up_all(&sess->vha->fcport_waitQ);
1195
1196                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1197                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1198                         return;
1199         }
1200
1201         sess->disc_state = DSC_DELETE_PEND;
1202
1203         if (sess->deleted == QLA_SESS_DELETED)
1204                 sess->logout_on_delete = 0;
1205
1206         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1207         qla24xx_chk_fcp_state(sess);
1208
1209         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1210             "Scheduling sess %p for deletion %8phC\n",
1211             sess, sess->port_name);
1212
1213         queue_work(sess->vha->hw->wq, &sess->del_work);
1214 }
1215
1216 void qlt_schedule_sess_for_deletion_lock(struct fc_port *sess)
1217 {
1218         unsigned long flags;
1219         struct qla_hw_data *ha = sess->vha->hw;
1220         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1221         qlt_schedule_sess_for_deletion(sess, 1);
1222         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1223 }
1224
1225 /* ha->tgt.sess_lock supposed to be held on entry */
1226 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1227 {
1228         struct fc_port *sess;
1229         scsi_qla_host_t *vha = tgt->vha;
1230
1231         list_for_each_entry(sess, &vha->vp_fcports, list) {
1232                 if (sess->se_sess)
1233                         qlt_schedule_sess_for_deletion(sess, 1);
1234         }
1235
1236         /* At this point tgt could be already dead */
1237 }
1238
1239 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1240         uint16_t *loop_id)
1241 {
1242         struct qla_hw_data *ha = vha->hw;
1243         dma_addr_t gid_list_dma;
1244         struct gid_list_info *gid_list;
1245         char *id_iter;
1246         int res, rc, i;
1247         uint16_t entries;
1248
1249         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1250             &gid_list_dma, GFP_KERNEL);
1251         if (!gid_list) {
1252                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1253                     "qla_target(%d): DMA Alloc failed of %u\n",
1254                     vha->vp_idx, qla2x00_gid_list_size(ha));
1255                 return -ENOMEM;
1256         }
1257
1258         /* Get list of logged in devices */
1259         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1260         if (rc != QLA_SUCCESS) {
1261                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1262                     "qla_target(%d): get_id_list() failed: %x\n",
1263                     vha->vp_idx, rc);
1264                 res = -EBUSY;
1265                 goto out_free_id_list;
1266         }
1267
1268         id_iter = (char *)gid_list;
1269         res = -ENOENT;
1270         for (i = 0; i < entries; i++) {
1271                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1272                 if ((gid->al_pa == s_id[2]) &&
1273                     (gid->area == s_id[1]) &&
1274                     (gid->domain == s_id[0])) {
1275                         *loop_id = le16_to_cpu(gid->loop_id);
1276                         res = 0;
1277                         break;
1278                 }
1279                 id_iter += ha->gid_list_info_size;
1280         }
1281
1282 out_free_id_list:
1283         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1284             gid_list, gid_list_dma);
1285         return res;
1286 }
1287
1288 /*
1289  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1290  * Caller must put it.
1291  */
1292 static struct fc_port *qlt_create_sess(
1293         struct scsi_qla_host *vha,
1294         fc_port_t *fcport,
1295         bool local)
1296 {
1297         struct qla_hw_data *ha = vha->hw;
1298         struct fc_port *sess = fcport;
1299         unsigned long flags;
1300
1301         if (vha->vha_tgt.qla_tgt->tgt_stop)
1302                 return NULL;
1303
1304         if (fcport->se_sess) {
1305                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1306                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1307                             "%s: kref_get_unless_zero failed for %8phC\n",
1308                             __func__, sess->port_name);
1309                         return NULL;
1310                 }
1311                 return fcport;
1312         }
1313         sess->tgt = vha->vha_tgt.qla_tgt;
1314         sess->local = local;
1315
1316         /*
1317          * Under normal circumstances we want to logout from firmware when
1318          * session eventually ends and release corresponding nport handle.
1319          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1320          * code will adjust these flags as necessary.
1321          */
1322         sess->logout_on_delete = 1;
1323         sess->keep_nport_handle = 0;
1324         sess->logout_completed = 0;
1325
1326         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1327             &fcport->port_name[0], sess) < 0) {
1328                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1329                     "(%d) %8phC check_initiator_node_acl failed\n",
1330                     vha->vp_idx, fcport->port_name);
1331                 return NULL;
1332         } else {
1333                 kref_init(&fcport->sess_kref);
1334                 /*
1335                  * Take an extra reference to ->sess_kref here to handle
1336                  * fc_port access across ->tgt.sess_lock reaquire.
1337                  */
1338                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1339                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1340                             "%s: kref_get_unless_zero failed for %8phC\n",
1341                             __func__, sess->port_name);
1342                         return NULL;
1343                 }
1344
1345                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1346                 if (!IS_SW_RESV_ADDR(sess->d_id))
1347                         vha->vha_tgt.qla_tgt->sess_count++;
1348
1349                 qlt_do_generation_tick(vha, &sess->generation);
1350                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1351         }
1352
1353         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1354             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1355             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1356             vha->vha_tgt.qla_tgt->sess_count);
1357
1358         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1359             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1360             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1361             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1362             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1363             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1364
1365         return sess;
1366 }
1367
1368 /*
1369  * max_gen - specifies maximum session generation
1370  * at which this deletion requestion is still valid
1371  */
1372 void
1373 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1374 {
1375         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1376         struct fc_port *sess = fcport;
1377         unsigned long flags;
1378
1379         if (!vha->hw->tgt.tgt_ops)
1380                 return;
1381
1382         if (!tgt)
1383                 return;
1384
1385         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1386         if (tgt->tgt_stop) {
1387                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1388                 return;
1389         }
1390         if (!sess->se_sess) {
1391                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1392                 return;
1393         }
1394
1395         if (max_gen - sess->generation < 0) {
1396                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1397                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1398                     "Ignoring stale deletion request for se_sess %p / sess %p"
1399                     " for port %8phC, req_gen %d, sess_gen %d\n",
1400                     sess->se_sess, sess, sess->port_name, max_gen,
1401                     sess->generation);
1402                 return;
1403         }
1404
1405         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1406
1407         sess->local = 1;
1408         qlt_schedule_sess_for_deletion(sess, false);
1409         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1410 }
1411
1412 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1413 {
1414         struct qla_hw_data *ha = tgt->ha;
1415         unsigned long flags;
1416         int res;
1417         /*
1418          * We need to protect against race, when tgt is freed before or
1419          * inside wake_up()
1420          */
1421         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1422         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1423             "tgt %p, sess_count=%d\n",
1424             tgt, tgt->sess_count);
1425         res = (tgt->sess_count == 0);
1426         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1427
1428         return res;
1429 }
1430
1431 /* Called by tcm_qla2xxx configfs code */
1432 int qlt_stop_phase1(struct qla_tgt *tgt)
1433 {
1434         struct scsi_qla_host *vha = tgt->vha;
1435         struct qla_hw_data *ha = tgt->ha;
1436         unsigned long flags;
1437
1438         mutex_lock(&qla_tgt_mutex);
1439         if (!vha->fc_vport) {
1440                 struct Scsi_Host *sh = vha->host;
1441                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1442                 bool npiv_vports;
1443
1444                 spin_lock_irqsave(sh->host_lock, flags);
1445                 npiv_vports = (fc_host->npiv_vports_inuse);
1446                 spin_unlock_irqrestore(sh->host_lock, flags);
1447
1448                 if (npiv_vports) {
1449                         mutex_unlock(&qla_tgt_mutex);
1450                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
1451                             "NPIV is in use. Can not stop target\n");
1452                         return -EPERM;
1453                 }
1454         }
1455         if (tgt->tgt_stop || tgt->tgt_stopped) {
1456                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1457                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1458                 mutex_unlock(&qla_tgt_mutex);
1459                 return -EPERM;
1460         }
1461
1462         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1463             vha->host_no, vha);
1464         /*
1465          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1466          * Lock is needed, because we still can get an incoming packet.
1467          */
1468         mutex_lock(&vha->vha_tgt.tgt_mutex);
1469         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1470         tgt->tgt_stop = 1;
1471         qlt_clear_tgt_db(tgt);
1472         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1473         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1474         mutex_unlock(&qla_tgt_mutex);
1475
1476         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1477             "Waiting for sess works (tgt %p)", tgt);
1478         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1479         while (!list_empty(&tgt->sess_works_list)) {
1480                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1481                 flush_scheduled_work();
1482                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1483         }
1484         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1485
1486         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1487             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1488
1489         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1490
1491         /* Big hammer */
1492         if (!ha->flags.host_shutting_down &&
1493             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1494                 qlt_disable_vha(vha);
1495
1496         /* Wait for sessions to clear out (just in case) */
1497         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1498         return 0;
1499 }
1500 EXPORT_SYMBOL(qlt_stop_phase1);
1501
1502 /* Called by tcm_qla2xxx configfs code */
1503 void qlt_stop_phase2(struct qla_tgt *tgt)
1504 {
1505         scsi_qla_host_t *vha = tgt->vha;
1506
1507         if (tgt->tgt_stopped) {
1508                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1509                     "Already in tgt->tgt_stopped state\n");
1510                 dump_stack();
1511                 return;
1512         }
1513         if (!tgt->tgt_stop) {
1514                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1515                     "%s: phase1 stop is not completed\n", __func__);
1516                 dump_stack();
1517                 return;
1518         }
1519
1520         mutex_lock(&tgt->ha->optrom_mutex);
1521         mutex_lock(&vha->vha_tgt.tgt_mutex);
1522         tgt->tgt_stop = 0;
1523         tgt->tgt_stopped = 1;
1524         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1525         mutex_unlock(&tgt->ha->optrom_mutex);
1526
1527         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1528             tgt);
1529 }
1530 EXPORT_SYMBOL(qlt_stop_phase2);
1531
1532 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1533 static void qlt_release(struct qla_tgt *tgt)
1534 {
1535         scsi_qla_host_t *vha = tgt->vha;
1536         void *node;
1537         u64 key = 0;
1538         u16 i;
1539         struct qla_qpair_hint *h;
1540         struct qla_hw_data *ha = vha->hw;
1541
1542         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
1543             !tgt->tgt_stopped)
1544                 qlt_stop_phase1(tgt);
1545
1546         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1547                 qlt_stop_phase2(tgt);
1548
1549         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1550                 unsigned long flags;
1551
1552                 h = &tgt->qphints[i];
1553                 if (h->qpair) {
1554                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1555                         list_del(&h->hint_elem);
1556                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1557                         h->qpair = NULL;
1558                 }
1559         }
1560         kfree(tgt->qphints);
1561         mutex_lock(&qla_tgt_mutex);
1562         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1563         mutex_unlock(&qla_tgt_mutex);
1564
1565         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1566                 btree_remove64(&tgt->lun_qpair_map, key);
1567
1568         btree_destroy64(&tgt->lun_qpair_map);
1569
1570         if (vha->vp_idx)
1571                 if (ha->tgt.tgt_ops &&
1572                     ha->tgt.tgt_ops->remove_target &&
1573                     vha->vha_tgt.target_lport_ptr)
1574                         ha->tgt.tgt_ops->remove_target(vha);
1575
1576         vha->vha_tgt.qla_tgt = NULL;
1577
1578         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1579             "Release of tgt %p finished\n", tgt);
1580
1581         kfree(tgt);
1582 }
1583
1584 /* ha->hardware_lock supposed to be held on entry */
1585 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1586         const void *param, unsigned int param_size)
1587 {
1588         struct qla_tgt_sess_work_param *prm;
1589         unsigned long flags;
1590
1591         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1592         if (!prm) {
1593                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1594                     "qla_target(%d): Unable to create session "
1595                     "work, command will be refused", 0);
1596                 return -ENOMEM;
1597         }
1598
1599         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1600             "Scheduling work (type %d, prm %p)"
1601             " to find session for param %p (size %d, tgt %p)\n",
1602             type, prm, param, param_size, tgt);
1603
1604         prm->type = type;
1605         memcpy(&prm->tm_iocb, param, param_size);
1606
1607         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1608         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1609         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1610
1611         schedule_work(&tgt->sess_work);
1612
1613         return 0;
1614 }
1615
1616 /*
1617  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1618  */
1619 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1620         struct imm_ntfy_from_isp *ntfy,
1621         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1622         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1623 {
1624         struct scsi_qla_host *vha = qpair->vha;
1625         struct qla_hw_data *ha = vha->hw;
1626         request_t *pkt;
1627         struct nack_to_isp *nack;
1628
1629         if (!ha->flags.fw_started)
1630                 return;
1631
1632         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1633
1634         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1635         if (!pkt) {
1636                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1637                     "qla_target(%d): %s failed: unable to allocate "
1638                     "request packet\n", vha->vp_idx, __func__);
1639                 return;
1640         }
1641
1642         if (vha->vha_tgt.qla_tgt != NULL)
1643                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1644
1645         pkt->entry_type = NOTIFY_ACK_TYPE;
1646         pkt->entry_count = 1;
1647
1648         nack = (struct nack_to_isp *)pkt;
1649         nack->ox_id = ntfy->ox_id;
1650
1651         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1652         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1653         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1654                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1655                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1656         }
1657         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1658         nack->u.isp24.status = ntfy->u.isp24.status;
1659         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1660         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1661         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1662         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1663         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1664         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1665         nack->u.isp24.srr_reject_code = srr_reject_code;
1666         nack->u.isp24.srr_reject_code_expl = srr_explan;
1667         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1668
1669         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1670             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1671             vha->vp_idx, nack->u.isp24.status);
1672
1673         /* Memory Barrier */
1674         wmb();
1675         qla2x00_start_iocbs(vha, qpair->req);
1676 }
1677
1678 /*
1679  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1680  */
1681 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1682         struct abts_recv_from_24xx *abts, uint32_t status,
1683         bool ids_reversed)
1684 {
1685         struct scsi_qla_host *vha = qpair->vha;
1686         struct qla_hw_data *ha = vha->hw;
1687         struct abts_resp_to_24xx *resp;
1688         uint32_t f_ctl;
1689         uint8_t *p;
1690
1691         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1692             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1693             ha, abts, status);
1694
1695         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1696             NULL);
1697         if (!resp) {
1698                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1699                     "qla_target(%d): %s failed: unable to allocate "
1700                     "request packet", vha->vp_idx, __func__);
1701                 return;
1702         }
1703
1704         resp->entry_type = ABTS_RESP_24XX;
1705         resp->entry_count = 1;
1706         resp->nport_handle = abts->nport_handle;
1707         resp->vp_index = vha->vp_idx;
1708         resp->sof_type = abts->sof_type;
1709         resp->exchange_address = abts->exchange_address;
1710         resp->fcp_hdr_le = abts->fcp_hdr_le;
1711         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1712             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1713             F_CTL_SEQ_INITIATIVE);
1714         p = (uint8_t *)&f_ctl;
1715         resp->fcp_hdr_le.f_ctl[0] = *p++;
1716         resp->fcp_hdr_le.f_ctl[1] = *p++;
1717         resp->fcp_hdr_le.f_ctl[2] = *p;
1718         if (ids_reversed) {
1719                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1720                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1721                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1722                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1723                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1724                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1725         } else {
1726                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1727                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1728                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1729                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1730                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1731                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1732         }
1733         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1734         if (status == FCP_TMF_CMPL) {
1735                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1736                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1737                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1738                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1739                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1740                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1741         } else {
1742                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1743                 resp->payload.ba_rjt.reason_code =
1744                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1745                 /* Other bytes are zero */
1746         }
1747
1748         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1749
1750         /* Memory Barrier */
1751         wmb();
1752         if (qpair->reqq_start_iocbs)
1753                 qpair->reqq_start_iocbs(qpair);
1754         else
1755                 qla2x00_start_iocbs(vha, qpair->req);
1756 }
1757
1758 /*
1759  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1760  */
1761 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1762         struct abts_resp_from_24xx_fw *entry)
1763 {
1764         struct ctio7_to_24xx *ctio;
1765
1766         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1767             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1768
1769         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(
1770             vha->hw->base_qpair, NULL);
1771         if (ctio == NULL) {
1772                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1773                     "qla_target(%d): %s failed: unable to allocate "
1774                     "request packet\n", vha->vp_idx, __func__);
1775                 return;
1776         }
1777
1778         /*
1779          * We've got on entrance firmware's response on by us generated
1780          * ABTS response. So, in it ID fields are reversed.
1781          */
1782
1783         ctio->entry_type = CTIO_TYPE7;
1784         ctio->entry_count = 1;
1785         ctio->nport_handle = entry->nport_handle;
1786         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1787         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1788         ctio->vp_index = vha->vp_idx;
1789         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1790         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1791         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1792         ctio->exchange_addr = entry->exchange_addr_to_abort;
1793         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1794                                             CTIO7_FLAGS_TERMINATE);
1795         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1796
1797         /* Memory Barrier */
1798         wmb();
1799         qla2x00_start_iocbs(vha, vha->req);
1800
1801         qlt_24xx_send_abts_resp(vha->hw->base_qpair,
1802             (struct abts_recv_from_24xx *)entry,
1803             FCP_TMF_CMPL, true);
1804 }
1805
1806 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1807 {
1808         struct qla_tgt_sess_op *op;
1809         struct qla_tgt_cmd *cmd;
1810         unsigned long flags;
1811
1812         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1813         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1814                 if (tag == op->atio.u.isp24.exchange_addr) {
1815                         op->aborted = true;
1816                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1817                         return 1;
1818                 }
1819         }
1820
1821         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1822                 if (tag == op->atio.u.isp24.exchange_addr) {
1823                         op->aborted = true;
1824                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1825                         return 1;
1826                 }
1827         }
1828
1829         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1830                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1831                         cmd->aborted = 1;
1832                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1833                         return 1;
1834                 }
1835         }
1836         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1837
1838         return 0;
1839 }
1840
1841 /* drop cmds for the given lun
1842  * XXX only looks for cmds on the port through which lun reset was recieved
1843  * XXX does not go through the list of other port (which may have cmds
1844  *     for the same lun)
1845  */
1846 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1847                                 u64 lun, uint8_t *s_id)
1848 {
1849         struct qla_tgt_sess_op *op;
1850         struct qla_tgt_cmd *cmd;
1851         uint32_t key;
1852         unsigned long flags;
1853
1854         key = sid_to_key(s_id);
1855         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1856         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1857                 uint32_t op_key;
1858                 u64 op_lun;
1859
1860                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1861                 op_lun = scsilun_to_int(
1862                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1863                 if (op_key == key && op_lun == lun)
1864                         op->aborted = true;
1865         }
1866
1867         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1868                 uint32_t op_key;
1869                 u64 op_lun;
1870
1871                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1872                 op_lun = scsilun_to_int(
1873                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1874                 if (op_key == key && op_lun == lun)
1875                         op->aborted = true;
1876         }
1877
1878         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1879                 uint32_t cmd_key;
1880                 u64 cmd_lun;
1881
1882                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1883                 cmd_lun = scsilun_to_int(
1884                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1885                 if (cmd_key == key && cmd_lun == lun)
1886                         cmd->aborted = 1;
1887         }
1888         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1889 }
1890
1891 /* ha->hardware_lock supposed to be held on entry */
1892 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1893         struct abts_recv_from_24xx *abts, struct fc_port *sess)
1894 {
1895         struct qla_hw_data *ha = vha->hw;
1896         struct qla_tgt_mgmt_cmd *mcmd;
1897         int rc;
1898
1899         if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1900                 /* send TASK_ABORT response immediately */
1901                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false);
1902                 return 0;
1903         }
1904
1905         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1906             "qla_target(%d): task abort (tag=%d)\n",
1907             vha->vp_idx, abts->exchange_addr_to_abort);
1908
1909         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1910         if (mcmd == NULL) {
1911                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1912                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1913                     vha->vp_idx, __func__);
1914                 return -ENOMEM;
1915         }
1916         memset(mcmd, 0, sizeof(*mcmd));
1917
1918         mcmd->sess = sess;
1919         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1920         mcmd->reset_count = ha->base_qpair->chip_reset;
1921         mcmd->tmr_func = QLA_TGT_ABTS;
1922         mcmd->qpair = ha->base_qpair;
1923         mcmd->vha = vha;
1924
1925         /*
1926          * LUN is looked up by target-core internally based on the passed
1927          * abts->exchange_addr_to_abort tag.
1928          */
1929         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, mcmd->tmr_func,
1930             abts->exchange_addr_to_abort);
1931         if (rc != 0) {
1932                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1933                     "qla_target(%d):  tgt_ops->handle_tmr()"
1934                     " failed: %d", vha->vp_idx, rc);
1935                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1936                 return -EFAULT;
1937         }
1938
1939         return 0;
1940 }
1941
1942 /*
1943  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1944  */
1945 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1946         struct abts_recv_from_24xx *abts)
1947 {
1948         struct qla_hw_data *ha = vha->hw;
1949         struct fc_port *sess;
1950         uint32_t tag = abts->exchange_addr_to_abort;
1951         uint8_t s_id[3];
1952         int rc;
1953         unsigned long flags;
1954
1955         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1956                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1957                     "qla_target(%d): ABTS: Abort Sequence not "
1958                     "supported\n", vha->vp_idx);
1959                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
1960                     false);
1961                 return;
1962         }
1963
1964         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1965                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1966                     "qla_target(%d): ABTS: Unknown Exchange "
1967                     "Address received\n", vha->vp_idx);
1968                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
1969                     false);
1970                 return;
1971         }
1972
1973         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1974             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1975             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1976             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1977             le32_to_cpu(abts->fcp_hdr_le.parameter));
1978
1979         s_id[0] = abts->fcp_hdr_le.s_id[2];
1980         s_id[1] = abts->fcp_hdr_le.s_id[1];
1981         s_id[2] = abts->fcp_hdr_le.s_id[0];
1982
1983         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1984         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1985         if (!sess) {
1986                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1987                     "qla_target(%d): task abort for non-existant session\n",
1988                     vha->vp_idx);
1989                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1990                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1991
1992                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1993
1994                 if (rc != 0) {
1995                         qlt_24xx_send_abts_resp(ha->base_qpair, abts,
1996                             FCP_TMF_REJECTED, false);
1997                 }
1998                 return;
1999         }
2000         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2001
2002
2003         if (sess->deleted) {
2004                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2005                     false);
2006                 return;
2007         }
2008
2009         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2010         if (rc != 0) {
2011                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2012                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2013                     vha->vp_idx, rc);
2014                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2015                     false);
2016                 return;
2017         }
2018 }
2019
2020 /*
2021  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2022  */
2023 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2024         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2025 {
2026         struct scsi_qla_host *ha = mcmd->vha;
2027         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2028         struct ctio7_to_24xx *ctio;
2029         uint16_t temp;
2030
2031         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2032             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2033             ha, atio, resp_code);
2034
2035
2036         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2037         if (ctio == NULL) {
2038                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2039                     "qla_target(%d): %s failed: unable to allocate "
2040                     "request packet\n", ha->vp_idx, __func__);
2041                 return;
2042         }
2043
2044         ctio->entry_type = CTIO_TYPE7;
2045         ctio->entry_count = 1;
2046         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2047         ctio->nport_handle = mcmd->sess->loop_id;
2048         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2049         ctio->vp_index = ha->vp_idx;
2050         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2051         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2052         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2053         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2054         temp = (atio->u.isp24.attr << 9)|
2055                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2056         ctio->u.status1.flags = cpu_to_le16(temp);
2057         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2058         ctio->u.status1.ox_id = cpu_to_le16(temp);
2059         ctio->u.status1.scsi_status =
2060             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2061         ctio->u.status1.response_len = cpu_to_le16(8);
2062         ctio->u.status1.sense_data[0] = resp_code;
2063
2064         /* Memory Barrier */
2065         wmb();
2066         if (qpair->reqq_start_iocbs)
2067                 qpair->reqq_start_iocbs(qpair);
2068         else
2069                 qla2x00_start_iocbs(ha, qpair->req);
2070 }
2071
2072 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2073 {
2074         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2075 }
2076 EXPORT_SYMBOL(qlt_free_mcmd);
2077
2078 /*
2079  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2080  * reacquire
2081  */
2082 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2083     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2084 {
2085         struct atio_from_isp *atio = &cmd->atio;
2086         struct ctio7_to_24xx *ctio;
2087         uint16_t temp;
2088         struct scsi_qla_host *vha = cmd->vha;
2089
2090         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2091             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2092             "sense_key=%02x, asc=%02x, ascq=%02x",
2093             vha, atio, scsi_status, sense_key, asc, ascq);
2094
2095         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2096         if (!ctio) {
2097                 ql_dbg(ql_dbg_async, vha, 0x3067,
2098                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2099                     vha->host_no, __func__);
2100                 goto out;
2101         }
2102
2103         ctio->entry_type = CTIO_TYPE7;
2104         ctio->entry_count = 1;
2105         ctio->handle = QLA_TGT_SKIP_HANDLE;
2106         ctio->nport_handle = cmd->sess->loop_id;
2107         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2108         ctio->vp_index = vha->vp_idx;
2109         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2110         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2111         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2112         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2113         temp = (atio->u.isp24.attr << 9) |
2114             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2115         ctio->u.status1.flags = cpu_to_le16(temp);
2116         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2117         ctio->u.status1.ox_id = cpu_to_le16(temp);
2118         ctio->u.status1.scsi_status =
2119             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2120         ctio->u.status1.response_len = cpu_to_le16(18);
2121         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2122
2123         if (ctio->u.status1.residual != 0)
2124                 ctio->u.status1.scsi_status |=
2125                     cpu_to_le16(SS_RESIDUAL_UNDER);
2126
2127         /* Fixed format sense data. */
2128         ctio->u.status1.sense_data[0] = 0x70;
2129         ctio->u.status1.sense_data[2] = sense_key;
2130         /* Additional sense length */
2131         ctio->u.status1.sense_data[7] = 0xa;
2132         /* ASC and ASCQ */
2133         ctio->u.status1.sense_data[12] = asc;
2134         ctio->u.status1.sense_data[13] = ascq;
2135
2136         /* Memory Barrier */
2137         wmb();
2138
2139         if (qpair->reqq_start_iocbs)
2140                 qpair->reqq_start_iocbs(qpair);
2141         else
2142                 qla2x00_start_iocbs(vha, qpair->req);
2143
2144 out:
2145         return;
2146 }
2147
2148 /* callback from target fabric module code */
2149 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2150 {
2151         struct scsi_qla_host *vha = mcmd->sess->vha;
2152         struct qla_hw_data *ha = vha->hw;
2153         unsigned long flags;
2154         struct qla_qpair *qpair = mcmd->qpair;
2155
2156         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2157             "TM response mcmd (%p) status %#x state %#x",
2158             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2159
2160         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2161
2162         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2163                 /*
2164                  * Either the port is not online or this request was from
2165                  * previous life, just abort the processing.
2166                  */
2167                 ql_dbg(ql_dbg_async, vha, 0xe100,
2168                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2169                         vha->flags.online, qla2x00_reset_active(vha),
2170                         mcmd->reset_count, qpair->chip_reset);
2171                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2172                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2173                 return;
2174         }
2175
2176         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2177                 if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2178                     ELS_LOGO ||
2179                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2180                     ELS_PRLO ||
2181                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2182                     ELS_TPRLO) {
2183                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2184                             "TM response logo %8phC status %#x state %#x",
2185                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2186                             mcmd->flags);
2187                         qlt_schedule_sess_for_deletion_lock(mcmd->sess);
2188                 } else {
2189                         qlt_send_notify_ack(vha->hw->base_qpair,
2190                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2191                 }
2192         } else {
2193                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2194                         qlt_24xx_send_abts_resp(qpair, &mcmd->orig_iocb.abts,
2195                             mcmd->fc_tm_rsp, false);
2196                 else
2197                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2198                             mcmd->fc_tm_rsp);
2199         }
2200         /*
2201          * Make the callback for ->free_mcmd() to queue_work() and invoke
2202          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2203          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2204          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2205          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2206          * qlt_xmit_tm_rsp() returns here..
2207          */
2208         ha->tgt.tgt_ops->free_mcmd(mcmd);
2209         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2210 }
2211 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2212
2213 /* No locks */
2214 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2215 {
2216         struct qla_tgt_cmd *cmd = prm->cmd;
2217
2218         BUG_ON(cmd->sg_cnt == 0);
2219
2220         prm->sg = (struct scatterlist *)cmd->sg;
2221         prm->seg_cnt = pci_map_sg(cmd->qpair->pdev, cmd->sg,
2222             cmd->sg_cnt, cmd->dma_data_direction);
2223         if (unlikely(prm->seg_cnt == 0))
2224                 goto out_err;
2225
2226         prm->cmd->sg_mapped = 1;
2227
2228         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2229                 /*
2230                  * If greater than four sg entries then we need to allocate
2231                  * the continuation entries
2232                  */
2233                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2234                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2235                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2236                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2237         } else {
2238                 /* DIF */
2239                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2240                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2241                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2242                         prm->tot_dsds = prm->seg_cnt;
2243                 } else
2244                         prm->tot_dsds = prm->seg_cnt;
2245
2246                 if (cmd->prot_sg_cnt) {
2247                         prm->prot_sg      = cmd->prot_sg;
2248                         prm->prot_seg_cnt = pci_map_sg(cmd->qpair->pdev,
2249                                 cmd->prot_sg, cmd->prot_sg_cnt,
2250                                 cmd->dma_data_direction);
2251                         if (unlikely(prm->prot_seg_cnt == 0))
2252                                 goto out_err;
2253
2254                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2255                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2256                                 /* Dif Bundling not support here */
2257                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2258                                                                 cmd->blk_sz);
2259                                 prm->tot_dsds += prm->prot_seg_cnt;
2260                         } else
2261                                 prm->tot_dsds += prm->prot_seg_cnt;
2262                 }
2263         }
2264
2265         return 0;
2266
2267 out_err:
2268         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2269             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2270             0, prm->cmd->sg_cnt);
2271         return -1;
2272 }
2273
2274 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2275 {
2276         struct qla_hw_data *ha;
2277         struct qla_qpair *qpair;
2278         if (!cmd->sg_mapped)
2279                 return;
2280
2281         qpair = cmd->qpair;
2282
2283         pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt,
2284             cmd->dma_data_direction);
2285         cmd->sg_mapped = 0;
2286
2287         if (cmd->prot_sg_cnt)
2288                 pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2289                         cmd->dma_data_direction);
2290
2291         if (!cmd->ctx)
2292                 return;
2293         ha = vha->hw;
2294         if (cmd->ctx_dsd_alloced)
2295                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2296
2297         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2298 }
2299
2300 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2301         uint32_t req_cnt)
2302 {
2303         uint32_t cnt;
2304         struct req_que *req = qpair->req;
2305
2306         if (req->cnt < (req_cnt + 2)) {
2307                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2308                     RD_REG_DWORD_RELAXED(req->req_q_out));
2309
2310                 if  (req->ring_index < cnt)
2311                         req->cnt = cnt - req->ring_index;
2312                 else
2313                         req->cnt = req->length - (req->ring_index - cnt);
2314
2315                 if (unlikely(req->cnt < (req_cnt + 2)))
2316                         return -EAGAIN;
2317         }
2318
2319         req->cnt -= req_cnt;
2320
2321         return 0;
2322 }
2323
2324 /*
2325  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2326  */
2327 static inline void *qlt_get_req_pkt(struct req_que *req)
2328 {
2329         /* Adjust ring index. */
2330         req->ring_index++;
2331         if (req->ring_index == req->length) {
2332                 req->ring_index = 0;
2333                 req->ring_ptr = req->ring;
2334         } else {
2335                 req->ring_ptr++;
2336         }
2337         return (cont_entry_t *)req->ring_ptr;
2338 }
2339
2340 /* ha->hardware_lock supposed to be held on entry */
2341 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2342 {
2343         uint32_t h;
2344         int index;
2345         uint8_t found = 0;
2346         struct req_que *req = qpair->req;
2347
2348         h = req->current_outstanding_cmd;
2349
2350         for (index = 1; index < req->num_outstanding_cmds; index++) {
2351                 h++;
2352                 if (h == req->num_outstanding_cmds)
2353                         h = 1;
2354
2355                 if (h == QLA_TGT_SKIP_HANDLE)
2356                         continue;
2357
2358                 if (!req->outstanding_cmds[h]) {
2359                         found = 1;
2360                         break;
2361                 }
2362         }
2363
2364         if (found) {
2365                 req->current_outstanding_cmd = h;
2366         } else {
2367                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2368                     "qla_target(%d): Ran out of empty cmd slots\n",
2369                     qpair->vha->vp_idx);
2370                 h = QLA_TGT_NULL_HANDLE;
2371         }
2372
2373         return h;
2374 }
2375
2376 /* ha->hardware_lock supposed to be held on entry */
2377 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2378         struct qla_tgt_prm *prm)
2379 {
2380         uint32_t h;
2381         struct ctio7_to_24xx *pkt;
2382         struct atio_from_isp *atio = &prm->cmd->atio;
2383         uint16_t temp;
2384
2385         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2386         prm->pkt = pkt;
2387         memset(pkt, 0, sizeof(*pkt));
2388
2389         pkt->entry_type = CTIO_TYPE7;
2390         pkt->entry_count = (uint8_t)prm->req_cnt;
2391         pkt->vp_index = prm->cmd->vp_idx;
2392
2393         h = qlt_make_handle(qpair);
2394         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2395                 /*
2396                  * CTIO type 7 from the firmware doesn't provide a way to
2397                  * know the initiator's LOOP ID, hence we can't find
2398                  * the session and, so, the command.
2399                  */
2400                 return -EAGAIN;
2401         } else
2402                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2403
2404         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2405         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2406         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2407         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2408         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2409         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2410         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2411         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2412         temp = atio->u.isp24.attr << 9;
2413         pkt->u.status0.flags |= cpu_to_le16(temp);
2414         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2415         pkt->u.status0.ox_id = cpu_to_le16(temp);
2416         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2417
2418         return 0;
2419 }
2420
2421 /*
2422  * ha->hardware_lock supposed to be held on entry. We have already made sure
2423  * that there is sufficient amount of request entries to not drop it.
2424  */
2425 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2426 {
2427         int cnt;
2428         uint32_t *dword_ptr;
2429
2430         /* Build continuation packets */
2431         while (prm->seg_cnt > 0) {
2432                 cont_a64_entry_t *cont_pkt64 =
2433                         (cont_a64_entry_t *)qlt_get_req_pkt(
2434                            prm->cmd->qpair->req);
2435
2436                 /*
2437                  * Make sure that from cont_pkt64 none of
2438                  * 64-bit specific fields used for 32-bit
2439                  * addressing. Cast to (cont_entry_t *) for
2440                  * that.
2441                  */
2442
2443                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2444
2445                 cont_pkt64->entry_count = 1;
2446                 cont_pkt64->sys_define = 0;
2447
2448                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2449                 dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2450
2451                 /* Load continuation entry data segments */
2452                 for (cnt = 0;
2453                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2454                     cnt++, prm->seg_cnt--) {
2455                         *dword_ptr++ =
2456                             cpu_to_le32(pci_dma_lo32
2457                                 (sg_dma_address(prm->sg)));
2458                         *dword_ptr++ = cpu_to_le32(pci_dma_hi32
2459                             (sg_dma_address(prm->sg)));
2460                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2461
2462                         prm->sg = sg_next(prm->sg);
2463                 }
2464         }
2465 }
2466
2467 /*
2468  * ha->hardware_lock supposed to be held on entry. We have already made sure
2469  * that there is sufficient amount of request entries to not drop it.
2470  */
2471 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2472 {
2473         int cnt;
2474         uint32_t *dword_ptr;
2475         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2476
2477         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2478
2479         /* Setup packet address segment pointer */
2480         dword_ptr = pkt24->u.status0.dseg_0_address;
2481
2482         /* Set total data segment count */
2483         if (prm->seg_cnt)
2484                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2485
2486         if (prm->seg_cnt == 0) {
2487                 /* No data transfer */
2488                 *dword_ptr++ = 0;
2489                 *dword_ptr = 0;
2490                 return;
2491         }
2492
2493         /* If scatter gather */
2494
2495         /* Load command entry data segments */
2496         for (cnt = 0;
2497             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2498             cnt++, prm->seg_cnt--) {
2499                 *dword_ptr++ =
2500                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2501
2502                 *dword_ptr++ = cpu_to_le32(pci_dma_hi32(
2503                         sg_dma_address(prm->sg)));
2504
2505                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2506
2507                 prm->sg = sg_next(prm->sg);
2508         }
2509
2510         qlt_load_cont_data_segments(prm);
2511 }
2512
2513 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2514 {
2515         return cmd->bufflen > 0;
2516 }
2517
2518 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2519 {
2520         struct qla_tgt_cmd *cmd;
2521         struct scsi_qla_host *vha;
2522
2523         /* asc 0x10=dif error */
2524         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2525                 cmd = prm->cmd;
2526                 vha = cmd->vha;
2527                 /* ASCQ */
2528                 switch (prm->sense_buffer[13]) {
2529                 case 1:
2530                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2531                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2532                             "se_cmd=%p tag[%x]",
2533                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2534                             cmd->atio.u.isp24.exchange_addr);
2535                         break;
2536                 case 2:
2537                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2538                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2539                             "se_cmd=%p tag[%x]",
2540                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2541                             cmd->atio.u.isp24.exchange_addr);
2542                         break;
2543                 case 3:
2544                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2545                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2546                             "se_cmd=%p tag[%x]",
2547                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2548                             cmd->atio.u.isp24.exchange_addr);
2549                         break;
2550                 default:
2551                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2552                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2553                             "se_cmd=%p tag[%x]",
2554                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2555                             cmd->atio.u.isp24.exchange_addr);
2556                         break;
2557                 }
2558                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2559         }
2560 }
2561
2562 /*
2563  * Called without ha->hardware_lock held
2564  */
2565 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2566         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2567         uint32_t *full_req_cnt)
2568 {
2569         struct se_cmd *se_cmd = &cmd->se_cmd;
2570         struct qla_qpair *qpair = cmd->qpair;
2571
2572         prm->cmd = cmd;
2573         prm->tgt = cmd->tgt;
2574         prm->pkt = NULL;
2575         prm->rq_result = scsi_status;
2576         prm->sense_buffer = &cmd->sense_buffer[0];
2577         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2578         prm->sg = NULL;
2579         prm->seg_cnt = -1;
2580         prm->req_cnt = 1;
2581         prm->residual = 0;
2582         prm->add_status_pkt = 0;
2583         prm->prot_sg = NULL;
2584         prm->prot_seg_cnt = 0;
2585         prm->tot_dsds = 0;
2586
2587         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2588                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2589                         return -EAGAIN;
2590         }
2591
2592         *full_req_cnt = prm->req_cnt;
2593
2594         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2595                 prm->residual = se_cmd->residual_count;
2596                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2597                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2598                        prm->residual, se_cmd->tag,
2599                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2600                        cmd->bufflen, prm->rq_result);
2601                 prm->rq_result |= SS_RESIDUAL_UNDER;
2602         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2603                 prm->residual = se_cmd->residual_count;
2604                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2605                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2606                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2607                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2608                 prm->rq_result |= SS_RESIDUAL_OVER;
2609         }
2610
2611         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2612                 /*
2613                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2614                  * ignored in *xmit_response() below
2615                  */
2616                 if (qlt_has_data(cmd)) {
2617                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2618                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2619                             (prm->rq_result != 0))) {
2620                                 prm->add_status_pkt = 1;
2621                                 (*full_req_cnt)++;
2622                         }
2623                 }
2624         }
2625
2626         return 0;
2627 }
2628
2629 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2630     int sending_sense)
2631 {
2632         if (cmd->qpair->enable_class_2)
2633                 return 0;
2634
2635         if (sending_sense)
2636                 return cmd->conf_compl_supported;
2637         else
2638                 return cmd->qpair->enable_explicit_conf &&
2639                     cmd->conf_compl_supported;
2640 }
2641
2642 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2643         struct qla_tgt_prm *prm)
2644 {
2645         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2646             (uint32_t)sizeof(ctio->u.status1.sense_data));
2647         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2648         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2649                 ctio->u.status0.flags |= cpu_to_le16(
2650                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2651                     CTIO7_FLAGS_CONFORM_REQ);
2652         }
2653         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2654         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2655         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2656                 int i;
2657
2658                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2659                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2660                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2661                                     "Skipping EXPLICIT_CONFORM and "
2662                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2663                                     "non GOOD status\n");
2664                                 goto skip_explict_conf;
2665                         }
2666                         ctio->u.status1.flags |= cpu_to_le16(
2667                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2668                             CTIO7_FLAGS_CONFORM_REQ);
2669                 }
2670 skip_explict_conf:
2671                 ctio->u.status1.flags &=
2672                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2673                 ctio->u.status1.flags |=
2674                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2675                 ctio->u.status1.scsi_status |=
2676                     cpu_to_le16(SS_SENSE_LEN_VALID);
2677                 ctio->u.status1.sense_length =
2678                     cpu_to_le16(prm->sense_buffer_len);
2679                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2680                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2681                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2682
2683                 qlt_print_dif_err(prm);
2684
2685         } else {
2686                 ctio->u.status1.flags &=
2687                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2688                 ctio->u.status1.flags |=
2689                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2690                 ctio->u.status1.sense_length = 0;
2691                 memset(ctio->u.status1.sense_data, 0,
2692                     sizeof(ctio->u.status1.sense_data));
2693         }
2694
2695         /* Sense with len > 24, is it possible ??? */
2696 }
2697
2698 static inline int
2699 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2700 {
2701         switch (se_cmd->prot_op) {
2702         case TARGET_PROT_DOUT_INSERT:
2703         case TARGET_PROT_DIN_STRIP:
2704                 if (ql2xenablehba_err_chk >= 1)
2705                         return 1;
2706                 break;
2707         case TARGET_PROT_DOUT_PASS:
2708         case TARGET_PROT_DIN_PASS:
2709                 if (ql2xenablehba_err_chk >= 2)
2710                         return 1;
2711                 break;
2712         case TARGET_PROT_DIN_INSERT:
2713         case TARGET_PROT_DOUT_STRIP:
2714                 return 1;
2715         default:
2716                 break;
2717         }
2718         return 0;
2719 }
2720
2721 static inline int
2722 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2723 {
2724         switch (se_cmd->prot_op) {
2725         case TARGET_PROT_DIN_INSERT:
2726         case TARGET_PROT_DOUT_INSERT:
2727         case TARGET_PROT_DIN_STRIP:
2728         case TARGET_PROT_DOUT_STRIP:
2729         case TARGET_PROT_DIN_PASS:
2730         case TARGET_PROT_DOUT_PASS:
2731             return 1;
2732         default:
2733             return 0;
2734         }
2735         return 0;
2736 }
2737
2738 /*
2739  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2740  */
2741 static void
2742 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2743     uint16_t *pfw_prot_opts)
2744 {
2745         struct se_cmd *se_cmd = &cmd->se_cmd;
2746         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2747         scsi_qla_host_t *vha = cmd->tgt->vha;
2748         struct qla_hw_data *ha = vha->hw;
2749         uint32_t t32 = 0;
2750
2751         /*
2752          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2753          * have been immplemented by TCM, before AppTag is avail.
2754          * Look for modesense_handlers[]
2755          */
2756         ctx->app_tag = 0;
2757         ctx->app_tag_mask[0] = 0x0;
2758         ctx->app_tag_mask[1] = 0x0;
2759
2760         if (IS_PI_UNINIT_CAPABLE(ha)) {
2761                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2762                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2763                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2764                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2765                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2766         }
2767
2768         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2769
2770         switch (se_cmd->prot_type) {
2771         case TARGET_DIF_TYPE0_PROT:
2772                 /*
2773                  * No check for ql2xenablehba_err_chk, as it
2774                  * would be an I/O error if hba tag generation
2775                  * is not done.
2776                  */
2777                 ctx->ref_tag = cpu_to_le32(lba);
2778                 /* enable ALL bytes of the ref tag */
2779                 ctx->ref_tag_mask[0] = 0xff;
2780                 ctx->ref_tag_mask[1] = 0xff;
2781                 ctx->ref_tag_mask[2] = 0xff;
2782                 ctx->ref_tag_mask[3] = 0xff;
2783                 break;
2784         case TARGET_DIF_TYPE1_PROT:
2785             /*
2786              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2787              * REF tag, and 16 bit app tag.
2788              */
2789             ctx->ref_tag = cpu_to_le32(lba);
2790             if (!qla_tgt_ref_mask_check(se_cmd) ||
2791                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2792                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2793                     break;
2794             }
2795             /* enable ALL bytes of the ref tag */
2796             ctx->ref_tag_mask[0] = 0xff;
2797             ctx->ref_tag_mask[1] = 0xff;
2798             ctx->ref_tag_mask[2] = 0xff;
2799             ctx->ref_tag_mask[3] = 0xff;
2800             break;
2801         case TARGET_DIF_TYPE2_PROT:
2802             /*
2803              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2804              * tag has to match LBA in CDB + N
2805              */
2806             ctx->ref_tag = cpu_to_le32(lba);
2807             if (!qla_tgt_ref_mask_check(se_cmd) ||
2808                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2809                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2810                     break;
2811             }
2812             /* enable ALL bytes of the ref tag */
2813             ctx->ref_tag_mask[0] = 0xff;
2814             ctx->ref_tag_mask[1] = 0xff;
2815             ctx->ref_tag_mask[2] = 0xff;
2816             ctx->ref_tag_mask[3] = 0xff;
2817             break;
2818         case TARGET_DIF_TYPE3_PROT:
2819             /* For TYPE 3 protection: 16 bit GUARD only */
2820             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2821             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2822                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2823             break;
2824         }
2825 }
2826
2827 static inline int
2828 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2829 {
2830         uint32_t                *cur_dsd;
2831         uint32_t                transfer_length = 0;
2832         uint32_t                data_bytes;
2833         uint32_t                dif_bytes;
2834         uint8_t                 bundling = 1;
2835         uint8_t                 *clr_ptr;
2836         struct crc_context      *crc_ctx_pkt = NULL;
2837         struct qla_hw_data      *ha;
2838         struct ctio_crc2_to_fw  *pkt;
2839         dma_addr_t              crc_ctx_dma;
2840         uint16_t                fw_prot_opts = 0;
2841         struct qla_tgt_cmd      *cmd = prm->cmd;
2842         struct se_cmd           *se_cmd = &cmd->se_cmd;
2843         uint32_t h;
2844         struct atio_from_isp *atio = &prm->cmd->atio;
2845         struct qla_tc_param     tc;
2846         uint16_t t16;
2847         scsi_qla_host_t *vha = cmd->vha;
2848
2849         ha = vha->hw;
2850
2851         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
2852         prm->pkt = pkt;
2853         memset(pkt, 0, sizeof(*pkt));
2854
2855         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
2856                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2857                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2858                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2859
2860         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2861             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2862                 bundling = 0;
2863
2864         /* Compute dif len and adjust data len to incude protection */
2865         data_bytes = cmd->bufflen;
2866         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2867
2868         switch (se_cmd->prot_op) {
2869         case TARGET_PROT_DIN_INSERT:
2870         case TARGET_PROT_DOUT_STRIP:
2871                 transfer_length = data_bytes;
2872                 if (cmd->prot_sg_cnt)
2873                         data_bytes += dif_bytes;
2874                 break;
2875         case TARGET_PROT_DIN_STRIP:
2876         case TARGET_PROT_DOUT_INSERT:
2877         case TARGET_PROT_DIN_PASS:
2878         case TARGET_PROT_DOUT_PASS:
2879                 transfer_length = data_bytes + dif_bytes;
2880                 break;
2881         default:
2882                 BUG();
2883                 break;
2884         }
2885
2886         if (!qlt_hba_err_chk_enabled(se_cmd))
2887                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2888         /* HBA error checking enabled */
2889         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2890                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2891                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2892                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2893                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2894                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2895         }
2896
2897         switch (se_cmd->prot_op) {
2898         case TARGET_PROT_DIN_INSERT:
2899         case TARGET_PROT_DOUT_INSERT:
2900                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2901                 break;
2902         case TARGET_PROT_DIN_STRIP:
2903         case TARGET_PROT_DOUT_STRIP:
2904                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2905                 break;
2906         case TARGET_PROT_DIN_PASS:
2907         case TARGET_PROT_DOUT_PASS:
2908                 fw_prot_opts |= PO_MODE_DIF_PASS;
2909                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2910                 break;
2911         default:/* Normal Request */
2912                 fw_prot_opts |= PO_MODE_DIF_PASS;
2913                 break;
2914         }
2915
2916         /* ---- PKT ---- */
2917         /* Update entry type to indicate Command Type CRC_2 IOCB */
2918         pkt->entry_type  = CTIO_CRC2;
2919         pkt->entry_count = 1;
2920         pkt->vp_index = cmd->vp_idx;
2921
2922         h = qlt_make_handle(qpair);
2923         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2924                 /*
2925                  * CTIO type 7 from the firmware doesn't provide a way to
2926                  * know the initiator's LOOP ID, hence we can't find
2927                  * the session and, so, the command.
2928                  */
2929                 return -EAGAIN;
2930         } else
2931                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2932
2933         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
2934         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2935         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2936         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2937         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2938         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2939         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2940         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2941
2942         /* silence compile warning */
2943         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2944         pkt->ox_id  = cpu_to_le16(t16);
2945
2946         t16 = (atio->u.isp24.attr << 9);
2947         pkt->flags |= cpu_to_le16(t16);
2948         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2949
2950         /* Set transfer direction */
2951         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2952                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2953         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2954                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2955
2956         pkt->dseg_count = prm->tot_dsds;
2957         /* Fibre channel byte count */
2958         pkt->transfer_length = cpu_to_le32(transfer_length);
2959
2960         /* ----- CRC context -------- */
2961
2962         /* Allocate CRC context from global pool */
2963         crc_ctx_pkt = cmd->ctx =
2964             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2965
2966         if (!crc_ctx_pkt)
2967                 goto crc_queuing_error;
2968
2969         /* Zero out CTX area. */
2970         clr_ptr = (uint8_t *)crc_ctx_pkt;
2971         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2972
2973         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2974         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2975
2976         /* Set handle */
2977         crc_ctx_pkt->handle = pkt->handle;
2978
2979         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
2980
2981         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2982         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2983         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2984
2985         if (!bundling) {
2986                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2987         } else {
2988                 /*
2989                  * Configure Bundling if we need to fetch interlaving
2990                  * protection PCI accesses
2991                  */
2992                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2993                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2994                 crc_ctx_pkt->u.bundling.dseg_count =
2995                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2996                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2997         }
2998
2999         /* Finish the common fields of CRC pkt */
3000         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3001         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3002         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3003         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3004
3005         memset((uint8_t *)&tc, 0 , sizeof(tc));
3006         tc.vha = vha;
3007         tc.blk_sz = cmd->blk_sz;
3008         tc.bufflen = cmd->bufflen;
3009         tc.sg = cmd->sg;
3010         tc.prot_sg = cmd->prot_sg;
3011         tc.ctx = crc_ctx_pkt;
3012         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3013
3014         /* Walks data segments */
3015         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3016
3017         if (!bundling && prm->prot_seg_cnt) {
3018                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3019                         prm->tot_dsds, &tc))
3020                         goto crc_queuing_error;
3021         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3022                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3023                 goto crc_queuing_error;
3024
3025         if (bundling && prm->prot_seg_cnt) {
3026                 /* Walks dif segments */
3027                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3028
3029                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
3030                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3031                         prm->prot_seg_cnt, &tc))
3032                         goto crc_queuing_error;
3033         }
3034         return QLA_SUCCESS;
3035
3036 crc_queuing_error:
3037         /* Cleanup will be performed by the caller */
3038         qpair->req->outstanding_cmds[h] = NULL;
3039
3040         return QLA_FUNCTION_FAILED;
3041 }
3042
3043 /*
3044  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3045  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3046  */
3047 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3048         uint8_t scsi_status)
3049 {
3050         struct scsi_qla_host *vha = cmd->vha;
3051         struct qla_qpair *qpair = cmd->qpair;
3052         struct ctio7_to_24xx *pkt;
3053         struct qla_tgt_prm prm;
3054         uint32_t full_req_cnt = 0;
3055         unsigned long flags = 0;
3056         int res;
3057
3058         if (cmd->sess && cmd->sess->deleted) {
3059                 cmd->state = QLA_TGT_STATE_PROCESSED;
3060                 if (cmd->sess->logout_completed)
3061                         /* no need to terminate. FW already freed exchange. */
3062                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3063                 else
3064                         qlt_send_term_exchange(qpair, cmd, &cmd->atio, 0, 0);
3065                 return 0;
3066         }
3067
3068         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3069             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3070             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3071             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3072             &cmd->se_cmd, qpair->id);
3073
3074         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3075             &full_req_cnt);
3076         if (unlikely(res != 0)) {
3077                 return res;
3078         }
3079
3080         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3081
3082         if (xmit_type == QLA_TGT_XMIT_STATUS)
3083                 qpair->tgt_counters.core_qla_snd_status++;
3084         else
3085                 qpair->tgt_counters.core_qla_que_buf++;
3086
3087         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3088                 /*
3089                  * Either the port is not online or this request was from
3090                  * previous life, just abort the processing.
3091                  */
3092                 cmd->state = QLA_TGT_STATE_PROCESSED;
3093                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3094                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3095                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3096                         vha->flags.online, qla2x00_reset_active(vha),
3097                         cmd->reset_count, qpair->chip_reset);
3098                 res = 0;
3099                 goto out_unmap_unlock;
3100         }
3101
3102         /* Does F/W have an IOCBs for this request */
3103         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3104         if (unlikely(res))
3105                 goto out_unmap_unlock;
3106
3107         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3108                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3109         else
3110                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3111         if (unlikely(res != 0)) {
3112                 qpair->req->cnt += full_req_cnt;
3113                 goto out_unmap_unlock;
3114         }
3115
3116         pkt = (struct ctio7_to_24xx *)prm.pkt;
3117
3118         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3119                 pkt->u.status0.flags |=
3120                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3121                         CTIO7_FLAGS_STATUS_MODE_0);
3122
3123                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3124                         qlt_load_data_segments(&prm);
3125
3126                 if (prm.add_status_pkt == 0) {
3127                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3128                                 pkt->u.status0.scsi_status =
3129                                     cpu_to_le16(prm.rq_result);
3130                                 pkt->u.status0.residual =
3131                                     cpu_to_le32(prm.residual);
3132                                 pkt->u.status0.flags |= cpu_to_le16(
3133                                     CTIO7_FLAGS_SEND_STATUS);
3134                                 if (qlt_need_explicit_conf(cmd, 0)) {
3135                                         pkt->u.status0.flags |=
3136                                             cpu_to_le16(
3137                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3138                                                 CTIO7_FLAGS_CONFORM_REQ);
3139                                 }
3140                         }
3141
3142                 } else {
3143                         /*
3144                          * We have already made sure that there is sufficient
3145                          * amount of request entries to not drop HW lock in
3146                          * req_pkt().
3147                          */
3148                         struct ctio7_to_24xx *ctio =
3149                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3150                                     qpair->req);
3151
3152                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3153                             "Building additional status packet 0x%p.\n",
3154                             ctio);
3155
3156                         /*
3157                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3158                          * ctio7_to_24xx
3159                          */
3160                         memcpy(ctio, pkt, sizeof(*ctio));
3161                         /* reset back to CTIO7 */
3162                         ctio->entry_count = 1;
3163                         ctio->entry_type = CTIO_TYPE7;
3164                         ctio->dseg_count = 0;
3165                         ctio->u.status1.flags &= ~cpu_to_le16(
3166                             CTIO7_FLAGS_DATA_IN);
3167
3168                         /* Real finish is ctio_m1's finish */
3169                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3170                         pkt->u.status0.flags |= cpu_to_le16(
3171                             CTIO7_FLAGS_DONT_RET_CTIO);
3172
3173                         /* qlt_24xx_init_ctio_to_isp will correct
3174                          * all neccessary fields that's part of CTIO7.
3175                          * There should be no residual of CTIO-CRC2 data.
3176                          */
3177                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3178                             &prm);
3179                 }
3180         } else
3181                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3182
3183
3184         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3185         cmd->cmd_sent_to_fw = 1;
3186
3187         /* Memory Barrier */
3188         wmb();
3189         if (qpair->reqq_start_iocbs)
3190                 qpair->reqq_start_iocbs(qpair);
3191         else
3192                 qla2x00_start_iocbs(vha, qpair->req);
3193         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3194
3195         return 0;
3196
3197 out_unmap_unlock:
3198         qlt_unmap_sg(vha, cmd);
3199         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3200
3201         return res;
3202 }
3203 EXPORT_SYMBOL(qlt_xmit_response);
3204
3205 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3206 {
3207         struct ctio7_to_24xx *pkt;
3208         struct scsi_qla_host *vha = cmd->vha;
3209         struct qla_tgt *tgt = cmd->tgt;
3210         struct qla_tgt_prm prm;
3211         unsigned long flags = 0;
3212         int res = 0;
3213         struct qla_qpair *qpair = cmd->qpair;
3214
3215         memset(&prm, 0, sizeof(prm));
3216         prm.cmd = cmd;
3217         prm.tgt = tgt;
3218         prm.sg = NULL;
3219         prm.req_cnt = 1;
3220
3221         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3222             (cmd->sess && cmd->sess->deleted)) {
3223                 /*
3224                  * Either the port is not online or this request was from
3225                  * previous life, just abort the processing.
3226                  */
3227                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3228                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3229                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3230                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3231                         vha->flags.online, qla2x00_reset_active(vha),
3232                         cmd->reset_count, qpair->chip_reset);
3233                 return 0;
3234         }
3235
3236         /* Calculate number of entries and segments required */
3237         if (qlt_pci_map_calc_cnt(&prm) != 0)
3238                 return -EAGAIN;
3239
3240         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3241         /* Does F/W have an IOCBs for this request */
3242         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3243         if (res != 0)
3244                 goto out_unlock_free_unmap;
3245         if (cmd->se_cmd.prot_op)
3246                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3247         else
3248                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3249
3250         if (unlikely(res != 0)) {
3251                 qpair->req->cnt += prm.req_cnt;
3252                 goto out_unlock_free_unmap;
3253         }
3254
3255         pkt = (struct ctio7_to_24xx *)prm.pkt;
3256         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3257             CTIO7_FLAGS_STATUS_MODE_0);
3258
3259         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3260                 qlt_load_data_segments(&prm);
3261
3262         cmd->state = QLA_TGT_STATE_NEED_DATA;
3263         cmd->cmd_sent_to_fw = 1;
3264
3265         /* Memory Barrier */
3266         wmb();
3267         if (qpair->reqq_start_iocbs)
3268                 qpair->reqq_start_iocbs(qpair);
3269         else
3270                 qla2x00_start_iocbs(vha, qpair->req);
3271         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3272
3273         return res;
3274
3275 out_unlock_free_unmap:
3276         qlt_unmap_sg(vha, cmd);
3277         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3278
3279         return res;
3280 }
3281 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3282
3283
3284 /*
3285  * it is assumed either hardware_lock or qpair lock is held.
3286  */
3287 static void
3288 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3289         struct ctio_crc_from_fw *sts)
3290 {
3291         uint8_t         *ap = &sts->actual_dif[0];
3292         uint8_t         *ep = &sts->expected_dif[0];
3293         uint64_t        lba = cmd->se_cmd.t_task_lba;
3294         uint8_t scsi_status, sense_key, asc, ascq;
3295         unsigned long flags;
3296         struct scsi_qla_host *vha = cmd->vha;
3297
3298         cmd->trc_flags |= TRC_DIF_ERR;
3299
3300         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3301         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3302         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3303
3304         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3305         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3306         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3307
3308         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3309             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3310
3311         scsi_status = sense_key = asc = ascq = 0;
3312
3313         /* check appl tag */
3314         if (cmd->e_app_tag != cmd->a_app_tag) {
3315                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3316                     "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]",
3317                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3318                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3319                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3320                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3321
3322                 cmd->dif_err_code = DIF_ERR_APP;
3323                 scsi_status = SAM_STAT_CHECK_CONDITION;
3324                 sense_key = ABORTED_COMMAND;
3325                 asc = 0x10;
3326                 ascq = 0x2;
3327         }
3328
3329         /* check ref tag */
3330         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3331                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3332                     "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] ",
3333                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3334                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3335                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3336                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3337
3338                 cmd->dif_err_code = DIF_ERR_REF;
3339                 scsi_status = SAM_STAT_CHECK_CONDITION;
3340                 sense_key = ABORTED_COMMAND;
3341                 asc = 0x10;
3342                 ascq = 0x3;
3343                 goto out;
3344         }
3345
3346         /* check guard */
3347         if (cmd->e_guard != cmd->a_guard) {
3348                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3349                     "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]",
3350                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3351                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3352                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3353                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3354
3355                 cmd->dif_err_code = DIF_ERR_GRD;
3356                 scsi_status = SAM_STAT_CHECK_CONDITION;
3357                 sense_key = ABORTED_COMMAND;
3358                 asc = 0x10;
3359                 ascq = 0x1;
3360         }
3361 out:
3362         switch (cmd->state) {
3363         case QLA_TGT_STATE_NEED_DATA:
3364                 /* handle_data will load DIF error code  */
3365                 cmd->state = QLA_TGT_STATE_DATA_IN;
3366                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3367                 break;
3368         default:
3369                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3370                 if (cmd->aborted) {
3371                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3372                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3373                         break;
3374                 }
3375                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3376
3377                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3378                     ascq);
3379                 /* assume scsi status gets out on the wire.
3380                  * Will not wait for completion.
3381                  */
3382                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3383                 break;
3384         }
3385 }
3386
3387 /* If hardware_lock held on entry, might drop it, then reaquire */
3388 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3389 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3390         struct imm_ntfy_from_isp *ntfy)
3391 {
3392         struct nack_to_isp *nack;
3393         struct qla_hw_data *ha = vha->hw;
3394         request_t *pkt;
3395         int ret = 0;
3396
3397         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3398             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3399
3400         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3401         if (pkt == NULL) {
3402                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3403                     "qla_target(%d): %s failed: unable to allocate "
3404                     "request packet\n", vha->vp_idx, __func__);
3405                 return -ENOMEM;
3406         }
3407
3408         pkt->entry_type = NOTIFY_ACK_TYPE;
3409         pkt->entry_count = 1;
3410         pkt->handle = QLA_TGT_SKIP_HANDLE;
3411
3412         nack = (struct nack_to_isp *)pkt;
3413         nack->ox_id = ntfy->ox_id;
3414
3415         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3416         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3417                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3418                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3419         }
3420
3421         /* terminate */
3422         nack->u.isp24.flags |=
3423                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3424
3425         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3426         nack->u.isp24.status = ntfy->u.isp24.status;
3427         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3428         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3429         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3430         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3431         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3432         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3433
3434         qla2x00_start_iocbs(vha, vha->req);
3435         return ret;
3436 }
3437
3438 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3439         struct imm_ntfy_from_isp *imm, int ha_locked)
3440 {
3441         unsigned long flags = 0;
3442         int rc;
3443
3444         if (ha_locked) {
3445                 rc = __qlt_send_term_imm_notif(vha, imm);
3446
3447 #if 0   /* Todo  */
3448                 if (rc == -ENOMEM)
3449                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3450 #else
3451                 if (rc) {
3452                 }
3453 #endif
3454                 goto done;
3455         }
3456
3457         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3458         rc = __qlt_send_term_imm_notif(vha, imm);
3459
3460 #if 0   /* Todo */
3461         if (rc == -ENOMEM)
3462                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3463 #endif
3464
3465 done:
3466         if (!ha_locked)
3467                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3468 }
3469
3470 /*
3471  * If hardware_lock held on entry, might drop it, then reaquire
3472  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3473  */
3474 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3475         struct qla_tgt_cmd *cmd,
3476         struct atio_from_isp *atio)
3477 {
3478         struct scsi_qla_host *vha = qpair->vha;
3479         struct ctio7_to_24xx *ctio24;
3480         struct qla_hw_data *ha = vha->hw;
3481         request_t *pkt;
3482         int ret = 0;
3483         uint16_t temp;
3484
3485         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3486
3487         if (cmd)
3488                 vha = cmd->vha;
3489
3490         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3491         if (pkt == NULL) {
3492                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3493                     "qla_target(%d): %s failed: unable to allocate "
3494                     "request packet\n", vha->vp_idx, __func__);
3495                 return -ENOMEM;
3496         }
3497
3498         if (cmd != NULL) {
3499                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3500                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3501                             "qla_target(%d): Terminating cmd %p with "
3502                             "incorrect state %d\n", vha->vp_idx, cmd,
3503                             cmd->state);
3504                 } else
3505                         ret = 1;
3506         }
3507
3508         qpair->tgt_counters.num_term_xchg_sent++;
3509         pkt->entry_count = 1;
3510         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3511
3512         ctio24 = (struct ctio7_to_24xx *)pkt;
3513         ctio24->entry_type = CTIO_TYPE7;
3514         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3515         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3516         ctio24->vp_index = vha->vp_idx;
3517         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3518         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3519         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3520         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3521         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3522                 CTIO7_FLAGS_TERMINATE;
3523         ctio24->u.status1.flags = cpu_to_le16(temp);
3524         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3525         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3526
3527         /* Most likely, it isn't needed */
3528         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3529             &atio->u.isp24.fcp_cmnd.add_cdb[
3530             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3531         if (ctio24->u.status1.residual != 0)
3532                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3533
3534         /* Memory Barrier */
3535         wmb();
3536         if (qpair->reqq_start_iocbs)
3537                 qpair->reqq_start_iocbs(qpair);
3538         else
3539                 qla2x00_start_iocbs(vha, qpair->req);
3540         return ret;
3541 }
3542
3543 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3544         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3545         int ul_abort)
3546 {
3547         struct scsi_qla_host *vha;
3548         unsigned long flags = 0;
3549         int rc;
3550
3551         /* why use different vha? NPIV */
3552         if (cmd)
3553                 vha = cmd->vha;
3554         else
3555                 vha = qpair->vha;
3556
3557         if (ha_locked) {
3558                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3559                 if (rc == -ENOMEM)
3560                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3561                 goto done;
3562         }
3563         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3564         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3565         if (rc == -ENOMEM)
3566                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3567
3568 done:
3569         if (cmd && !ul_abort && !cmd->aborted) {
3570                 if (cmd->sg_mapped)
3571                         qlt_unmap_sg(vha, cmd);
3572                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3573         }
3574
3575         if (!ha_locked)
3576                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3577
3578         return;
3579 }
3580
3581 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3582 {
3583         struct list_head free_list;
3584         struct qla_tgt_cmd *cmd, *tcmd;
3585
3586         vha->hw->tgt.leak_exchg_thresh_hold =
3587             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3588
3589         cmd = tcmd = NULL;
3590         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3591                 INIT_LIST_HEAD(&free_list);
3592                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3593
3594                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3595                         list_del(&cmd->cmd_list);
3596                         /* This cmd was never sent to TCM.  There is no need
3597                          * to schedule free or call free_cmd
3598                          */
3599                         qlt_free_cmd(cmd);
3600                         vha->hw->tgt.num_qfull_cmds_alloc--;
3601                 }
3602         }
3603         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3604 }
3605
3606 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3607 {
3608         uint32_t total_leaked;
3609
3610         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3611
3612         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3613             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3614
3615                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3616                     "Chip reset due to exchange starvation: %d/%d.\n",
3617                     total_leaked, vha->hw->cur_fw_xcb_count);
3618
3619                 if (IS_P3P_TYPE(vha->hw))
3620                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3621                 else
3622                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3623                 qla2xxx_wake_dpc(vha);
3624         }
3625
3626 }
3627
3628 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3629 {
3630         struct qla_tgt *tgt = cmd->tgt;
3631         struct scsi_qla_host *vha = tgt->vha;
3632         struct se_cmd *se_cmd = &cmd->se_cmd;
3633         unsigned long flags;
3634
3635         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3636             "qla_target(%d): terminating exchange for aborted cmd=%p "
3637             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3638             se_cmd->tag);
3639
3640         spin_lock_irqsave(&cmd->cmd_lock, flags);
3641         if (cmd->aborted) {
3642                 if (cmd->sg_mapped)
3643                         qlt_unmap_sg(vha, cmd);
3644
3645                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3646                 /*
3647                  * It's normal to see 2 calls in this path:
3648                  *  1) XFER Rdy completion + CMD_T_ABORT
3649                  *  2) TCM TMR - drain_state_list
3650                  */
3651                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3652                     "multiple abort. %p transport_state %x, t_state %x, "
3653                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3654                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3655                 return EIO;
3656         }
3657         cmd->aborted = 1;
3658         cmd->trc_flags |= TRC_ABORT;
3659         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3660
3661         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3662         return 0;
3663 }
3664 EXPORT_SYMBOL(qlt_abort_cmd);
3665
3666 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3667 {
3668         struct fc_port *sess = cmd->sess;
3669
3670         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3671             "%s: se_cmd[%p] ox_id %04x\n",
3672             __func__, &cmd->se_cmd,
3673             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3674
3675         BUG_ON(cmd->cmd_in_wq);
3676
3677         if (!cmd->q_full)
3678                 qlt_decr_num_pend_cmds(cmd->vha);
3679
3680         BUG_ON(cmd->sg_mapped);
3681         cmd->jiffies_at_free = get_jiffies_64();
3682         if (unlikely(cmd->free_sg))
3683                 kfree(cmd->sg);
3684
3685         if (!sess || !sess->se_sess) {
3686                 WARN_ON(1);
3687                 return;
3688         }
3689         cmd->jiffies_at_free = get_jiffies_64();
3690         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3691 }
3692 EXPORT_SYMBOL(qlt_free_cmd);
3693
3694 /*
3695  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3696  */
3697 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3698         struct qla_tgt_cmd *cmd, uint32_t status)
3699 {
3700         int term = 0;
3701         struct scsi_qla_host *vha = qpair->vha;
3702
3703         if (cmd->se_cmd.prot_op)
3704                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3705                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3706                     "se_cmd=%p tag[%x] op %#x/%s",
3707                      cmd->lba, cmd->lba,
3708                      cmd->num_blks, &cmd->se_cmd,
3709                      cmd->atio.u.isp24.exchange_addr,
3710                      cmd->se_cmd.prot_op,
3711                      prot_op_str(cmd->se_cmd.prot_op));
3712
3713         if (ctio != NULL) {
3714                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3715                 term = !(c->flags &
3716                     cpu_to_le16(OF_TERM_EXCH));
3717         } else
3718                 term = 1;
3719
3720         if (term)
3721                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3722
3723         return term;
3724 }
3725
3726
3727 /* ha->hardware_lock supposed to be held on entry */
3728 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3729         struct rsp_que *rsp, uint32_t handle, void *ctio)
3730 {
3731         struct qla_tgt_cmd *cmd = NULL;
3732         struct req_que *req;
3733         int qid = GET_QID(handle);
3734         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3735
3736         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3737                 return NULL;
3738
3739         if (qid == rsp->req->id) {
3740                 req = rsp->req;
3741         } else if (vha->hw->req_q_map[qid]) {
3742                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3743                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3744                     vha->vp_idx, rsp->id, handle);
3745                 req = vha->hw->req_q_map[qid];
3746         } else {
3747                 return NULL;
3748         }
3749
3750         h &= QLA_CMD_HANDLE_MASK;
3751
3752         if (h != QLA_TGT_NULL_HANDLE) {
3753                 if (unlikely(h >= req->num_outstanding_cmds)) {
3754                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3755                             "qla_target(%d): Wrong handle %x received\n",
3756                             vha->vp_idx, handle);
3757                         return NULL;
3758                 }
3759
3760                 cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h];
3761                 if (unlikely(cmd == NULL)) {
3762                         ql_dbg(ql_dbg_async, vha, 0xe053,
3763                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3764                                 vha->vp_idx, handle, req->id, rsp->id);
3765                         return NULL;
3766                 }
3767                 req->outstanding_cmds[h] = NULL;
3768         } else if (ctio != NULL) {
3769                 /* We can't get loop ID from CTIO7 */
3770                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3771                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3772                     "support NULL handles\n", vha->vp_idx);
3773                 return NULL;
3774         }
3775
3776         return cmd;
3777 }
3778
3779 /* hardware_lock should be held by caller. */
3780 void
3781 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3782 {
3783         struct qla_hw_data *ha = vha->hw;
3784
3785         if (cmd->sg_mapped)
3786                 qlt_unmap_sg(vha, cmd);
3787
3788         /* TODO: fix debug message type and ids. */
3789         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3790                 ql_dbg(ql_dbg_io, vha, 0xff00,
3791                     "HOST-ABORT: state=PROCESSED.\n");
3792         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3793                 cmd->write_data_transferred = 0;
3794                 cmd->state = QLA_TGT_STATE_DATA_IN;
3795
3796                 ql_dbg(ql_dbg_io, vha, 0xff01,
3797                     "HOST-ABORT: state=DATA_IN.\n");
3798
3799                 ha->tgt.tgt_ops->handle_data(cmd);
3800                 return;
3801         } else {
3802                 ql_dbg(ql_dbg_io, vha, 0xff03,
3803                     "HOST-ABORT: state=BAD(%d).\n",
3804                     cmd->state);
3805                 dump_stack();
3806         }
3807
3808         cmd->trc_flags |= TRC_FLUSH;
3809         ha->tgt.tgt_ops->free_cmd(cmd);
3810 }
3811
3812 /*
3813  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3814  */
3815 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3816     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3817 {
3818         struct qla_hw_data *ha = vha->hw;
3819         struct se_cmd *se_cmd;
3820         struct qla_tgt_cmd *cmd;
3821         struct qla_qpair *qpair = rsp->qpair;
3822
3823         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3824                 /* That could happen only in case of an error/reset/abort */
3825                 if (status != CTIO_SUCCESS) {
3826                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3827                             "Intermediate CTIO received"
3828                             " (status %x)\n", status);
3829                 }
3830                 return;
3831         }
3832
3833         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3834         if (cmd == NULL)
3835                 return;
3836
3837         se_cmd = &cmd->se_cmd;
3838         cmd->cmd_sent_to_fw = 0;
3839
3840         qlt_unmap_sg(vha, cmd);
3841
3842         if (unlikely(status != CTIO_SUCCESS)) {
3843                 switch (status & 0xFFFF) {
3844                 case CTIO_LIP_RESET:
3845                 case CTIO_TARGET_RESET:
3846                 case CTIO_ABORTED:
3847                         /* driver request abort via Terminate exchange */
3848                 case CTIO_TIMEOUT:
3849                 case CTIO_INVALID_RX_ID:
3850                         /* They are OK */
3851                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3852                             "qla_target(%d): CTIO with "
3853                             "status %#x received, state %x, se_cmd %p, "
3854                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3855                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3856                             status, cmd->state, se_cmd);
3857                         break;
3858
3859                 case CTIO_PORT_LOGGED_OUT:
3860                 case CTIO_PORT_UNAVAILABLE:
3861                 {
3862                         int logged_out =
3863                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3864
3865                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3866                             "qla_target(%d): CTIO with %s status %x "
3867                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3868                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3869                             status, cmd->state, se_cmd);
3870
3871                         if (logged_out && cmd->sess) {
3872                                 /*
3873                                  * Session is already logged out, but we need
3874                                  * to notify initiator, who's not aware of this
3875                                  */
3876                                 cmd->sess->logout_on_delete = 0;
3877                                 cmd->sess->send_els_logo = 1;
3878                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3879                                     "%s %d %8phC post del sess\n",
3880                                     __func__, __LINE__, cmd->sess->port_name);
3881
3882                                 qlt_schedule_sess_for_deletion_lock(cmd->sess);
3883                         }
3884                         break;
3885                 }
3886                 case CTIO_DIF_ERROR: {
3887                         struct ctio_crc_from_fw *crc =
3888                                 (struct ctio_crc_from_fw *)ctio;
3889                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3890                             "qla_target(%d): CTIO with DIF_ERROR status %x "
3891                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3892                             "expect_dif[0x%llx]\n",
3893                             vha->vp_idx, status, cmd->state, se_cmd,
3894                             *((u64 *)&crc->actual_dif[0]),
3895                             *((u64 *)&crc->expected_dif[0]));
3896
3897                         qlt_handle_dif_error(qpair, cmd, ctio);
3898                         return;
3899                 }
3900                 default:
3901                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3902                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3903                             vha->vp_idx, status, cmd->state, se_cmd);
3904                         break;
3905                 }
3906
3907
3908                 /* "cmd->aborted" means
3909                  * cmd is already aborted/terminated, we don't
3910                  * need to terminate again.  The exchange is already
3911                  * cleaned up/freed at FW level.  Just cleanup at driver
3912                  * level.
3913                  */
3914                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3915                     (!cmd->aborted)) {
3916                         cmd->trc_flags |= TRC_CTIO_ERR;
3917                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
3918                                 return;
3919                 }
3920         }
3921
3922         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3923                 cmd->trc_flags |= TRC_CTIO_DONE;
3924         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3925                 cmd->state = QLA_TGT_STATE_DATA_IN;
3926
3927                 if (status == CTIO_SUCCESS)
3928                         cmd->write_data_transferred = 1;
3929
3930                 ha->tgt.tgt_ops->handle_data(cmd);
3931                 return;
3932         } else if (cmd->aborted) {
3933                 cmd->trc_flags |= TRC_CTIO_ABORTED;
3934                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3935                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3936         } else {
3937                 cmd->trc_flags |= TRC_CTIO_STRANGE;
3938                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3939                     "qla_target(%d): A command in state (%d) should "
3940                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3941         }
3942
3943         if (unlikely(status != CTIO_SUCCESS) &&
3944                 !cmd->aborted) {
3945                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3946                 dump_stack();
3947         }
3948
3949         ha->tgt.tgt_ops->free_cmd(cmd);
3950 }
3951
3952 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3953         uint8_t task_codes)
3954 {
3955         int fcp_task_attr;
3956
3957         switch (task_codes) {
3958         case ATIO_SIMPLE_QUEUE:
3959                 fcp_task_attr = TCM_SIMPLE_TAG;
3960                 break;
3961         case ATIO_HEAD_OF_QUEUE:
3962                 fcp_task_attr = TCM_HEAD_TAG;
3963                 break;
3964         case ATIO_ORDERED_QUEUE:
3965                 fcp_task_attr = TCM_ORDERED_TAG;
3966                 break;
3967         case ATIO_ACA_QUEUE:
3968                 fcp_task_attr = TCM_ACA_TAG;
3969                 break;
3970         case ATIO_UNTAGGED:
3971                 fcp_task_attr = TCM_SIMPLE_TAG;
3972                 break;
3973         default:
3974                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3975                     "qla_target: unknown task code %x, use ORDERED instead\n",
3976                     task_codes);
3977                 fcp_task_attr = TCM_ORDERED_TAG;
3978                 break;
3979         }
3980
3981         return fcp_task_attr;
3982 }
3983
3984 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
3985                                         uint8_t *);
3986 /*
3987  * Process context for I/O path into tcm_qla2xxx code
3988  */
3989 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3990 {
3991         scsi_qla_host_t *vha = cmd->vha;
3992         struct qla_hw_data *ha = vha->hw;
3993         struct fc_port *sess = cmd->sess;
3994         struct atio_from_isp *atio = &cmd->atio;
3995         unsigned char *cdb;
3996         unsigned long flags;
3997         uint32_t data_length;
3998         int ret, fcp_task_attr, data_dir, bidi = 0;
3999         struct qla_qpair *qpair = cmd->qpair;
4000
4001         cmd->cmd_in_wq = 0;
4002         cmd->trc_flags |= TRC_DO_WORK;
4003
4004         if (cmd->aborted) {
4005                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4006                     "cmd with tag %u is aborted\n",
4007                     cmd->atio.u.isp24.exchange_addr);
4008                 goto out_term;
4009         }
4010
4011         spin_lock_init(&cmd->cmd_lock);
4012         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4013         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4014
4015         if (atio->u.isp24.fcp_cmnd.rddata &&
4016             atio->u.isp24.fcp_cmnd.wrdata) {
4017                 bidi = 1;
4018                 data_dir = DMA_TO_DEVICE;
4019         } else if (atio->u.isp24.fcp_cmnd.rddata)
4020                 data_dir = DMA_FROM_DEVICE;
4021         else if (atio->u.isp24.fcp_cmnd.wrdata)
4022                 data_dir = DMA_TO_DEVICE;
4023         else
4024                 data_dir = DMA_NONE;
4025
4026         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4027             atio->u.isp24.fcp_cmnd.task_attr);
4028         data_length = be32_to_cpu(get_unaligned((uint32_t *)
4029             &atio->u.isp24.fcp_cmnd.add_cdb[
4030             atio->u.isp24.fcp_cmnd.add_cdb_len]));
4031
4032         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4033                                           fcp_task_attr, data_dir, bidi);
4034         if (ret != 0)
4035                 goto out_term;
4036         /*
4037          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4038          */
4039         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4040         ha->tgt.tgt_ops->put_sess(sess);
4041         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4042         return;
4043
4044 out_term:
4045         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4046         /*
4047          * cmd has not sent to target yet, so pass NULL as the second
4048          * argument to qlt_send_term_exchange() and free the memory here.
4049          */
4050         cmd->trc_flags |= TRC_DO_WORK_ERR;
4051         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4052         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4053
4054         qlt_decr_num_pend_cmds(vha);
4055         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
4056         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4057
4058         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4059         ha->tgt.tgt_ops->put_sess(sess);
4060         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4061 }
4062
4063 static void qlt_do_work(struct work_struct *work)
4064 {
4065         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4066         scsi_qla_host_t *vha = cmd->vha;
4067         unsigned long flags;
4068
4069         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4070         list_del(&cmd->cmd_list);
4071         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4072
4073         __qlt_do_work(cmd);
4074 }
4075
4076 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4077 {
4078         unsigned long flags;
4079         struct qla_hw_data *ha = vha->hw;
4080         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4081         void *node;
4082         u64 key = 0;
4083
4084         ql_log(ql_log_info, vha, 0x706c,
4085             "User update Number of Active Qpairs %d\n",
4086             ha->tgt.num_act_qpairs);
4087
4088         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4089
4090         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4091                 btree_remove64(&tgt->lun_qpair_map, key);
4092
4093         ha->base_qpair->lun_cnt = 0;
4094         for (key = 0; key < ha->max_qpairs; key++)
4095                 if (ha->queue_pair_map[key])
4096                         ha->queue_pair_map[key]->lun_cnt = 0;
4097
4098         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4099 }
4100
4101 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4102         struct qla_tgt_cmd *cmd)
4103 {
4104         struct qla_qpair *qpair, *qp;
4105         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4106         struct qla_qpair_hint *h;
4107
4108         if (vha->flags.qpairs_available) {
4109                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4110                 if (unlikely(!h)) {
4111                         /* spread lun to qpair ratio evently */
4112                         int lcnt = 0, rc;
4113                         struct scsi_qla_host *base_vha =
4114                                 pci_get_drvdata(vha->hw->pdev);
4115
4116                         qpair = vha->hw->base_qpair;
4117                         if (qpair->lun_cnt == 0) {
4118                                 qpair->lun_cnt++;
4119                                 h = qla_qpair_to_hint(tgt, qpair);
4120                                 BUG_ON(!h);
4121                                 rc = btree_insert64(&tgt->lun_qpair_map,
4122                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4123                                 if (rc) {
4124                                         qpair->lun_cnt--;
4125                                         ql_log(ql_log_info, vha, 0xd037,
4126                                             "Unable to insert lun %llx into lun_qpair_map\n",
4127                                             cmd->unpacked_lun);
4128                                 }
4129                                 goto out;
4130                         } else {
4131                                 lcnt = qpair->lun_cnt;
4132                         }
4133
4134                         h = NULL;
4135                         list_for_each_entry(qp, &base_vha->qp_list,
4136                             qp_list_elem) {
4137                                 if (qp->lun_cnt == 0) {
4138                                         qp->lun_cnt++;
4139                                         h = qla_qpair_to_hint(tgt, qp);
4140                                         BUG_ON(!h);
4141                                         rc = btree_insert64(&tgt->lun_qpair_map,
4142                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4143                                         if (rc) {
4144                                                 qp->lun_cnt--;
4145                                                 ql_log(ql_log_info, vha, 0xd038,
4146                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4147                                                         cmd->unpacked_lun);
4148                                         }
4149                                         qpair = qp;
4150                                         goto out;
4151                                 } else {
4152                                         if (qp->lun_cnt < lcnt) {
4153                                                 lcnt = qp->lun_cnt;
4154                                                 qpair = qp;
4155                                                 continue;
4156                                         }
4157                                 }
4158                         }
4159                         BUG_ON(!qpair);
4160                         qpair->lun_cnt++;
4161                         h = qla_qpair_to_hint(tgt, qpair);
4162                         BUG_ON(!h);
4163                         rc = btree_insert64(&tgt->lun_qpair_map,
4164                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4165                         if (rc) {
4166                                 qpair->lun_cnt--;
4167                                 ql_log(ql_log_info, vha, 0xd039,
4168                                    "Unable to insert lun %llx into lun_qpair_map\n",
4169                                    cmd->unpacked_lun);
4170                         }
4171                 }
4172         } else {
4173                 h = &tgt->qphints[0];
4174         }
4175 out:
4176         cmd->qpair = h->qpair;
4177         cmd->se_cmd.cpuid = h->cpuid;
4178 }
4179
4180 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4181                                        struct fc_port *sess,
4182                                        struct atio_from_isp *atio)
4183 {
4184         struct se_session *se_sess = sess->se_sess;
4185         struct qla_tgt_cmd *cmd;
4186         int tag;
4187
4188         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4189         if (tag < 0)
4190                 return NULL;
4191
4192         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4193         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4194         cmd->cmd_type = TYPE_TGT_CMD;
4195         memcpy(&cmd->atio, atio, sizeof(*atio));
4196         cmd->state = QLA_TGT_STATE_NEW;
4197         cmd->tgt = vha->vha_tgt.qla_tgt;
4198         qlt_incr_num_pend_cmds(vha);
4199         cmd->vha = vha;
4200         cmd->se_cmd.map_tag = tag;
4201         cmd->sess = sess;
4202         cmd->loop_id = sess->loop_id;
4203         cmd->conf_compl_supported = sess->conf_compl_supported;
4204
4205         cmd->trc_flags = 0;
4206         cmd->jiffies_at_alloc = get_jiffies_64();
4207
4208         cmd->unpacked_lun = scsilun_to_int(
4209             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4210         qlt_assign_qpair(vha, cmd);
4211         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4212         cmd->vp_idx = vha->vp_idx;
4213
4214         return cmd;
4215 }
4216
4217 static void qlt_create_sess_from_atio(struct work_struct *work)
4218 {
4219         struct qla_tgt_sess_op *op = container_of(work,
4220                                         struct qla_tgt_sess_op, work);
4221         scsi_qla_host_t *vha = op->vha;
4222         struct qla_hw_data *ha = vha->hw;
4223         struct fc_port *sess;
4224         struct qla_tgt_cmd *cmd;
4225         unsigned long flags;
4226         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
4227
4228         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4229         list_del(&op->cmd_list);
4230         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4231
4232         if (op->aborted) {
4233                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
4234                     "sess_op with tag %u is aborted\n",
4235                     op->atio.u.isp24.exchange_addr);
4236                 goto out_term;
4237         }
4238
4239         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
4240             "qla_target(%d): Unable to find wwn login"
4241             " (s_id %x:%x:%x), trying to create it manually\n",
4242             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
4243
4244         if (op->atio.u.raw.entry_count > 1) {
4245                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
4246                     "Dropping multy entry atio %p\n", &op->atio);
4247                 goto out_term;
4248         }
4249
4250         sess = qlt_make_local_sess(vha, s_id);
4251         /* sess has an extra creation ref. */
4252
4253         if (!sess)
4254                 goto out_term;
4255         /*
4256          * Now obtain a pre-allocated session tag using the original op->atio
4257          * packet header, and dispatch into __qlt_do_work() using the existing
4258          * process context.
4259          */
4260         cmd = qlt_get_tag(vha, sess, &op->atio);
4261         if (!cmd) {
4262                 struct qla_qpair *qpair = ha->base_qpair;
4263
4264                 spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4265                 qlt_send_busy(qpair, &op->atio, SAM_STAT_BUSY);
4266                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4267
4268                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4269                 ha->tgt.tgt_ops->put_sess(sess);
4270                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4271                 kfree(op);
4272                 return;
4273         }
4274
4275         /*
4276          * __qlt_do_work() will call qlt_put_sess() to release
4277          * the extra reference taken above by qlt_make_local_sess()
4278          */
4279         __qlt_do_work(cmd);
4280         kfree(op);
4281         return;
4282 out_term:
4283         qlt_send_term_exchange(vha->hw->base_qpair, NULL, &op->atio, 0, 0);
4284         kfree(op);
4285 }
4286
4287 /* ha->hardware_lock supposed to be held on entry */
4288 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4289         struct atio_from_isp *atio)
4290 {
4291         struct qla_hw_data *ha = vha->hw;
4292         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4293         struct fc_port *sess;
4294         struct qla_tgt_cmd *cmd;
4295         unsigned long flags;
4296
4297         if (unlikely(tgt->tgt_stop)) {
4298                 ql_dbg(ql_dbg_io, vha, 0x3061,
4299                     "New command while device %p is shutting down\n", tgt);
4300                 return -EFAULT;
4301         }
4302
4303         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4304         if (unlikely(!sess)) {
4305                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
4306                                                      GFP_ATOMIC);
4307                 if (!op)
4308                         return -ENOMEM;
4309
4310                 memcpy(&op->atio, atio, sizeof(*atio));
4311                 op->vha = vha;
4312
4313                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
4314                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
4315                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4316
4317                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
4318                 queue_work(qla_tgt_wq, &op->work);
4319                 return 0;
4320         }
4321
4322         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4323          * session deletion, but it's still in sess_del_work wq */
4324         if (sess->deleted) {
4325                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4326                     "New command while old session %p is being deleted\n",
4327                     sess);
4328                 return -EFAULT;
4329         }
4330
4331         /*
4332          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4333          */
4334         if (!kref_get_unless_zero(&sess->sess_kref)) {
4335                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4336                     "%s: kref_get fail, %8phC oxid %x \n",
4337                     __func__, sess->port_name,
4338                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4339                 return -EFAULT;
4340         }
4341
4342         cmd = qlt_get_tag(vha, sess, atio);
4343         if (!cmd) {
4344                 ql_dbg(ql_dbg_io, vha, 0x3062,
4345                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4346                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4347                 ha->tgt.tgt_ops->put_sess(sess);
4348                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4349                 return -ENOMEM;
4350         }
4351
4352         cmd->cmd_in_wq = 1;
4353         cmd->trc_flags |= TRC_NEW_CMD;
4354
4355         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4356         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4357         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4358
4359         INIT_WORK(&cmd->work, qlt_do_work);
4360         if (vha->flags.qpairs_available) {
4361                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4362         } else if (ha->msix_count) {
4363                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4364                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4365                             &cmd->work);
4366                 else
4367                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4368                             &cmd->work);
4369         } else {
4370                 queue_work(qla_tgt_wq, &cmd->work);
4371         }
4372
4373         return 0;
4374 }
4375
4376 /* ha->hardware_lock supposed to be held on entry */
4377 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4378         int fn, void *iocb, int flags)
4379 {
4380         struct scsi_qla_host *vha = sess->vha;
4381         struct qla_hw_data *ha = vha->hw;
4382         struct qla_tgt_mgmt_cmd *mcmd;
4383         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4384         int res;
4385
4386         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4387         if (!mcmd) {
4388                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4389                     "qla_target(%d): Allocation of management "
4390                     "command failed, some commands and their data could "
4391                     "leak\n", vha->vp_idx);
4392                 return -ENOMEM;
4393         }
4394         memset(mcmd, 0, sizeof(*mcmd));
4395         mcmd->sess = sess;
4396
4397         if (iocb) {
4398                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4399                     sizeof(mcmd->orig_iocb.imm_ntfy));
4400         }
4401         mcmd->tmr_func = fn;
4402         mcmd->flags = flags;
4403         mcmd->reset_count = ha->base_qpair->chip_reset;
4404         mcmd->qpair = ha->base_qpair;
4405         mcmd->vha = vha;
4406
4407         switch (fn) {
4408         case QLA_TGT_LUN_RESET:
4409             abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4410             break;
4411         }
4412
4413         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func, 0);
4414         if (res != 0) {
4415                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4416                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4417                     sess->vha->vp_idx, res);
4418                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4419                 return -EFAULT;
4420         }
4421
4422         return 0;
4423 }
4424
4425 /* ha->hardware_lock supposed to be held on entry */
4426 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4427 {
4428         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4429         struct qla_hw_data *ha = vha->hw;
4430         struct qla_tgt *tgt;
4431         struct fc_port *sess;
4432         u64 unpacked_lun;
4433         int fn;
4434         unsigned long flags;
4435
4436         tgt = vha->vha_tgt.qla_tgt;
4437
4438         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4439
4440         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4441         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4442             a->u.isp24.fcp_hdr.s_id);
4443         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4444
4445         unpacked_lun =
4446             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4447
4448         if (!sess) {
4449                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4450                     "qla_target(%d): task mgmt fn 0x%x for "
4451                     "non-existant session\n", vha->vp_idx, fn);
4452                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4453                     sizeof(struct atio_from_isp));
4454         }
4455
4456         if (sess->deleted)
4457                 return -EFAULT;
4458
4459         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4460 }
4461
4462 /* ha->hardware_lock supposed to be held on entry */
4463 static int __qlt_abort_task(struct scsi_qla_host *vha,
4464         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4465 {
4466         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4467         struct qla_hw_data *ha = vha->hw;
4468         struct qla_tgt_mgmt_cmd *mcmd;
4469         u64 unpacked_lun;
4470         int rc;
4471
4472         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4473         if (mcmd == NULL) {
4474                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4475                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4476                     vha->vp_idx, __func__);
4477                 return -ENOMEM;
4478         }
4479         memset(mcmd, 0, sizeof(*mcmd));
4480
4481         mcmd->sess = sess;
4482         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4483             sizeof(mcmd->orig_iocb.imm_ntfy));
4484
4485         unpacked_lun =
4486             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4487         mcmd->reset_count = ha->base_qpair->chip_reset;
4488         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4489         mcmd->qpair = ha->base_qpair;
4490
4491         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4492             le16_to_cpu(iocb->u.isp2x.seq_id));
4493         if (rc != 0) {
4494                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4495                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4496                     vha->vp_idx, rc);
4497                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4498                 return -EFAULT;
4499         }
4500
4501         return 0;
4502 }
4503
4504 /* ha->hardware_lock supposed to be held on entry */
4505 static int qlt_abort_task(struct scsi_qla_host *vha,
4506         struct imm_ntfy_from_isp *iocb)
4507 {
4508         struct qla_hw_data *ha = vha->hw;
4509         struct fc_port *sess;
4510         int loop_id;
4511         unsigned long flags;
4512
4513         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4514
4515         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4516         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4517         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4518
4519         if (sess == NULL) {
4520                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4521                     "qla_target(%d): task abort for unexisting "
4522                     "session\n", vha->vp_idx);
4523                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4524                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4525         }
4526
4527         return __qlt_abort_task(vha, iocb, sess);
4528 }
4529
4530 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4531 {
4532         if (rc != MBS_COMMAND_COMPLETE) {
4533                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4534                         "%s: se_sess %p / sess %p from"
4535                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4536                         " LOGO failed: %#x\n",
4537                         __func__,
4538                         fcport->se_sess,
4539                         fcport,
4540                         fcport->port_name, fcport->loop_id,
4541                         fcport->d_id.b.domain, fcport->d_id.b.area,
4542                         fcport->d_id.b.al_pa, rc);
4543         }
4544
4545         fcport->logout_completed = 1;
4546 }
4547
4548 /*
4549 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4550 *
4551 * Schedules sessions with matching port_id/loop_id but different wwn for
4552 * deletion. Returns existing session with matching wwn if present.
4553 * Null otherwise.
4554 */
4555 struct fc_port *
4556 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4557     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4558 {
4559         struct fc_port *sess = NULL, *other_sess;
4560         uint64_t other_wwn;
4561
4562         *conflict_sess = NULL;
4563
4564         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4565
4566                 other_wwn = wwn_to_u64(other_sess->port_name);
4567
4568                 if (wwn == other_wwn) {
4569                         WARN_ON(sess);
4570                         sess = other_sess;
4571                         continue;
4572                 }
4573
4574                 /* find other sess with nport_id collision */
4575                 if (port_id.b24 == other_sess->d_id.b24) {
4576                         if (loop_id != other_sess->loop_id) {
4577                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4578                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4579                                     other_sess, other_sess->loop_id, other_wwn);
4580
4581                                 /*
4582                                  * logout_on_delete is set by default, but another
4583                                  * session that has the same s_id/loop_id combo
4584                                  * might have cleared it when requested this session
4585                                  * deletion, so don't touch it
4586                                  */
4587                                 qlt_schedule_sess_for_deletion(other_sess, true);
4588                         } else {
4589                                 /*
4590                                  * Another wwn used to have our s_id/loop_id
4591                                  * kill the session, but don't free the loop_id
4592                                  */
4593                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4594                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4595                                     other_sess, other_sess->loop_id, other_wwn);
4596
4597                                 other_sess->keep_nport_handle = 1;
4598                                 if (other_sess->disc_state != DSC_DELETED)
4599                                         *conflict_sess = other_sess;
4600                                 qlt_schedule_sess_for_deletion(other_sess,
4601                                     true);
4602                         }
4603                         continue;
4604                 }
4605
4606                 /* find other sess with nport handle collision */
4607                 if ((loop_id == other_sess->loop_id) &&
4608                         (loop_id != FC_NO_LOOP_ID)) {
4609                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4610                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4611                                other_sess, other_sess->loop_id, other_wwn);
4612
4613                         /* Same loop_id but different s_id
4614                          * Ok to kill and logout */
4615                         qlt_schedule_sess_for_deletion(other_sess, true);
4616                 }
4617         }
4618
4619         return sess;
4620 }
4621
4622 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4623 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4624 {
4625         struct qla_tgt_sess_op *op;
4626         struct qla_tgt_cmd *cmd;
4627         uint32_t key;
4628         int count = 0;
4629         unsigned long flags;
4630
4631         key = (((u32)s_id->b.domain << 16) |
4632                ((u32)s_id->b.area   <<  8) |
4633                ((u32)s_id->b.al_pa));
4634
4635         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4636         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4637                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4638
4639                 if (op_key == key) {
4640                         op->aborted = true;
4641                         count++;
4642                 }
4643         }
4644
4645         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4646                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4647                 if (op_key == key) {
4648                         op->aborted = true;
4649                         count++;
4650                 }
4651         }
4652
4653         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4654                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4655                 if (cmd_key == key) {
4656                         cmd->aborted = 1;
4657                         count++;
4658                 }
4659         }
4660         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4661
4662         return count;
4663 }
4664
4665 /*
4666  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4667  */
4668 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4669         struct imm_ntfy_from_isp *iocb)
4670 {
4671         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4672         struct qla_hw_data *ha = vha->hw;
4673         struct fc_port *sess = NULL, *conflict_sess = NULL;
4674         uint64_t wwn;
4675         port_id_t port_id;
4676         uint16_t loop_id;
4677         uint16_t wd3_lo;
4678         int res = 0;
4679         struct qlt_plogi_ack_t *pla;
4680         unsigned long flags;
4681
4682         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4683
4684         port_id.b.domain = iocb->u.isp24.port_id[2];
4685         port_id.b.area   = iocb->u.isp24.port_id[1];
4686         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4687         port_id.b.rsvd_1 = 0;
4688
4689         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4690
4691         ql_dbg(ql_dbg_disc, vha, 0xf026,
4692             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4693             vha->vp_idx, iocb->u.isp24.port_id[2],
4694                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4695                    iocb->u.isp24.status_subcode, loop_id,
4696                 iocb->u.isp24.port_name);
4697
4698         /* res = 1 means ack at the end of thread
4699          * res = 0 means ack async/later.
4700          */
4701         switch (iocb->u.isp24.status_subcode) {
4702         case ELS_PLOGI:
4703
4704                 /* Mark all stale commands in qla_tgt_wq for deletion */
4705                 abort_cmds_for_s_id(vha, &port_id);
4706
4707                 if (wwn) {
4708                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4709                         sess = qlt_find_sess_invalidate_other(vha, wwn,
4710                                 port_id, loop_id, &conflict_sess);
4711                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4712                 }
4713
4714                 if (IS_SW_RESV_ADDR(port_id)) {
4715                         res = 1;
4716                         break;
4717                 }
4718
4719                 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4720                 if (!pla) {
4721                         qlt_send_term_imm_notif(vha, iocb, 1);
4722                         break;
4723                 }
4724
4725                 res = 0;
4726
4727                 if (conflict_sess) {
4728                         conflict_sess->login_gen++;
4729                         qlt_plogi_ack_link(vha, pla, conflict_sess,
4730                                 QLT_PLOGI_LINK_CONFLICT);
4731                 }
4732
4733                 if (!sess) {
4734                         pla->ref_count++;
4735                         qla24xx_post_newsess_work(vha, &port_id,
4736                                 iocb->u.isp24.port_name, pla);
4737                         res = 0;
4738                         break;
4739                 }
4740
4741                 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4742                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4743                 sess->d_id = port_id;
4744                 sess->login_gen++;
4745
4746                 switch (sess->disc_state) {
4747                 case DSC_DELETED:
4748                         qlt_plogi_ack_unref(vha, pla);
4749                         break;
4750
4751                 default:
4752                         /*
4753                          * Under normal circumstances we want to release nport handle
4754                          * during LOGO process to avoid nport handle leaks inside FW.
4755                          * The exception is when LOGO is done while another PLOGI with
4756                          * the same nport handle is waiting as might be the case here.
4757                          * Note: there is always a possibily of a race where session
4758                          * deletion has already started for other reasons (e.g. ACL
4759                          * removal) and now PLOGI arrives:
4760                          * 1. if PLOGI arrived in FW after nport handle has been freed,
4761                          *    FW must have assigned this PLOGI a new/same handle and we
4762                          *    can proceed ACK'ing it as usual when session deletion
4763                          *    completes.
4764                          * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4765                          *    bit reached it, the handle has now been released. We'll
4766                          *    get an error when we ACK this PLOGI. Nothing will be sent
4767                          *    back to initiator. Initiator should eventually retry
4768                          *    PLOGI and situation will correct itself.
4769                          */
4770                         sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4771                            (sess->d_id.b24 == port_id.b24));
4772
4773                         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4774                             "%s %d %8phC post del sess\n",
4775                             __func__, __LINE__, sess->port_name);
4776
4777
4778                         qlt_schedule_sess_for_deletion_lock(sess);
4779                         break;
4780                 }
4781
4782                 break;
4783
4784         case ELS_PRLI:
4785                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4786
4787                 if (wwn) {
4788                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4789                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4790                                 loop_id, &conflict_sess);
4791                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4792                 }
4793
4794                 if (conflict_sess) {
4795                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4796                             "PRLI with conflicting sess %p port %8phC\n",
4797                             conflict_sess, conflict_sess->port_name);
4798                         qlt_send_term_imm_notif(vha, iocb, 1);
4799                         res = 0;
4800                         break;
4801                 }
4802
4803                 if (sess != NULL) {
4804                         if (sess->fw_login_state != DSC_LS_PLOGI_PEND &&
4805                             sess->fw_login_state != DSC_LS_PLOGI_COMP) {
4806                                 /*
4807                                  * Impatient initiator sent PRLI before last
4808                                  * PLOGI could finish. Will force him to re-try,
4809                                  * while last one finishes.
4810                                  */
4811                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4812                                     "sess %p PRLI received, before plogi ack.\n",
4813                                     sess);
4814                                 qlt_send_term_imm_notif(vha, iocb, 1);
4815                                 res = 0;
4816                                 break;
4817                         }
4818
4819                         /*
4820                          * This shouldn't happen under normal circumstances,
4821                          * since we have deleted the old session during PLOGI
4822                          */
4823                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4824                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4825                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4826
4827                         sess->local = 0;
4828                         sess->loop_id = loop_id;
4829                         sess->d_id = port_id;
4830                         sess->fw_login_state = DSC_LS_PRLI_PEND;
4831
4832                         if (wd3_lo & BIT_7)
4833                                 sess->conf_compl_supported = 1;
4834
4835                         if ((wd3_lo & BIT_4) == 0)
4836                                 sess->port_type = FCT_INITIATOR;
4837                         else
4838                                 sess->port_type = FCT_TARGET;
4839                 }
4840                 res = 1; /* send notify ack */
4841
4842                 /* Make session global (not used in fabric mode) */
4843                 if (ha->current_topology != ISP_CFG_F) {
4844                         if (sess) {
4845                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
4846                                     "%s %d %8phC post nack\n",
4847                                     __func__, __LINE__, sess->port_name);
4848                                 qla24xx_post_nack_work(vha, sess, iocb,
4849                                         SRB_NACK_PRLI);
4850                                 res = 0;
4851                         } else {
4852                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4853                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4854                                 qla2xxx_wake_dpc(vha);
4855                         }
4856                 } else {
4857                         if (sess) {
4858                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
4859                                     "%s %d %8phC post nack\n",
4860                                     __func__, __LINE__, sess->port_name);
4861                                 qla24xx_post_nack_work(vha, sess, iocb,
4862                                         SRB_NACK_PRLI);
4863                                 res = 0;
4864                         }
4865                 }
4866                 break;
4867
4868         case ELS_TPRLO:
4869                 if (le16_to_cpu(iocb->u.isp24.flags) &
4870                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
4871                         loop_id = 0xFFFF;
4872                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
4873                         res = 1;
4874                         break;
4875                 }
4876                 /* drop through */
4877         case ELS_LOGO:
4878         case ELS_PRLO:
4879                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4880                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
4881                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4882
4883                 if (sess) {
4884                         sess->login_gen++;
4885                         sess->fw_login_state = DSC_LS_LOGO_PEND;
4886                         sess->logo_ack_needed = 1;
4887                         memcpy(sess->iocb, iocb, IOCB_SIZE);
4888                 }
4889
4890                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4891
4892                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
4893                     "%s: logo %llx res %d sess %p ",
4894                     __func__, wwn, res, sess);
4895                 if (res == 0) {
4896                         /*
4897                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
4898                          * for LOGO_ACK & sess delete
4899                          */
4900                         BUG_ON(!sess);
4901                         res = 0;
4902                 } else {
4903                         /* cmd did not go to upper layer. */
4904                         if (sess) {
4905                                 qlt_schedule_sess_for_deletion_lock(sess);
4906                                 res = 0;
4907                         }
4908                         /* else logo will be ack */
4909                 }
4910                 break;
4911         case ELS_PDISC:
4912         case ELS_ADISC:
4913         {
4914                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4915                 if (tgt->link_reinit_iocb_pending) {
4916                         qlt_send_notify_ack(ha->base_qpair,
4917                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
4918                         tgt->link_reinit_iocb_pending = 0;
4919                 }
4920
4921                 sess = qla2x00_find_fcport_by_wwpn(vha,
4922                     iocb->u.isp24.port_name, 1);
4923                 if (sess) {
4924                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
4925                                 "sess %p lid %d|%d DS %d LS %d\n",
4926                                 sess, sess->loop_id, loop_id,
4927                                 sess->disc_state, sess->fw_login_state);
4928                 }
4929
4930                 res = 1; /* send notify ack */
4931                 break;
4932         }
4933
4934         case ELS_FLOGI: /* should never happen */
4935         default:
4936                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4937                     "qla_target(%d): Unsupported ELS command %x "
4938                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4939                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4940                 break;
4941         }
4942
4943         return res;
4944 }
4945
4946 /*
4947  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4948  */
4949 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4950         struct imm_ntfy_from_isp *iocb)
4951 {
4952         struct qla_hw_data *ha = vha->hw;
4953         uint32_t add_flags = 0;
4954         int send_notify_ack = 1;
4955         uint16_t status;
4956
4957         status = le16_to_cpu(iocb->u.isp2x.status);
4958         switch (status) {
4959         case IMM_NTFY_LIP_RESET:
4960         {
4961                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4962                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4963                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4964                     iocb->u.isp24.status_subcode);
4965
4966                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4967                         send_notify_ack = 0;
4968                 break;
4969         }
4970
4971         case IMM_NTFY_LIP_LINK_REINIT:
4972         {
4973                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4974                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4975                     "qla_target(%d): LINK REINIT (loop %#x, "
4976                     "subcode %x)\n", vha->vp_idx,
4977                     le16_to_cpu(iocb->u.isp24.nport_handle),
4978                     iocb->u.isp24.status_subcode);
4979                 if (tgt->link_reinit_iocb_pending) {
4980                         qlt_send_notify_ack(ha->base_qpair,
4981                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
4982                 }
4983                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4984                 tgt->link_reinit_iocb_pending = 1;
4985                 /*
4986                  * QLogic requires to wait after LINK REINIT for possible
4987                  * PDISC or ADISC ELS commands
4988                  */
4989                 send_notify_ack = 0;
4990                 break;
4991         }
4992
4993         case IMM_NTFY_PORT_LOGOUT:
4994                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4995                     "qla_target(%d): Port logout (loop "
4996                     "%#x, subcode %x)\n", vha->vp_idx,
4997                     le16_to_cpu(iocb->u.isp24.nport_handle),
4998                     iocb->u.isp24.status_subcode);
4999
5000                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5001                         send_notify_ack = 0;
5002                 /* The sessions will be cleared in the callback, if needed */
5003                 break;
5004
5005         case IMM_NTFY_GLBL_TPRLO:
5006                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5007                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5008                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5009                         send_notify_ack = 0;
5010                 /* The sessions will be cleared in the callback, if needed */
5011                 break;
5012
5013         case IMM_NTFY_PORT_CONFIG:
5014                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5015                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5016                     status);
5017                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5018                         send_notify_ack = 0;
5019                 /* The sessions will be cleared in the callback, if needed */
5020                 break;
5021
5022         case IMM_NTFY_GLBL_LOGO:
5023                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5024                     "qla_target(%d): Link failure detected\n",
5025                     vha->vp_idx);
5026                 /* I_T nexus loss */
5027                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5028                         send_notify_ack = 0;
5029                 break;
5030
5031         case IMM_NTFY_IOCB_OVERFLOW:
5032                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5033                     "qla_target(%d): Cannot provide requested "
5034                     "capability (IOCB overflowed the immediate notify "
5035                     "resource count)\n", vha->vp_idx);
5036                 break;
5037
5038         case IMM_NTFY_ABORT_TASK:
5039                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5040                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5041                     "L %#x)\n", vha->vp_idx,
5042                     le16_to_cpu(iocb->u.isp2x.seq_id),
5043                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5044                     le16_to_cpu(iocb->u.isp2x.lun));
5045                 if (qlt_abort_task(vha, iocb) == 0)
5046                         send_notify_ack = 0;
5047                 break;
5048
5049         case IMM_NTFY_RESOURCE:
5050                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5051                     "qla_target(%d): Out of resources, host %ld\n",
5052                     vha->vp_idx, vha->host_no);
5053                 break;
5054
5055         case IMM_NTFY_MSG_RX:
5056                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5057                     "qla_target(%d): Immediate notify task %x\n",
5058                     vha->vp_idx, iocb->u.isp2x.task_flags);
5059                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
5060                         send_notify_ack = 0;
5061                 break;
5062
5063         case IMM_NTFY_ELS:
5064                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5065                         send_notify_ack = 0;
5066                 break;
5067         default:
5068                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5069                     "qla_target(%d): Received unknown immediate "
5070                     "notify status %x\n", vha->vp_idx, status);
5071                 break;
5072         }
5073
5074         if (send_notify_ack)
5075                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5076                     0, 0);
5077 }
5078
5079 /*
5080  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5081  * This function sends busy to ISP 2xxx or 24xx.
5082  */
5083 static int __qlt_send_busy(struct qla_qpair *qpair,
5084         struct atio_from_isp *atio, uint16_t status)
5085 {
5086         struct scsi_qla_host *vha = qpair->vha;
5087         struct ctio7_to_24xx *ctio24;
5088         struct qla_hw_data *ha = vha->hw;
5089         request_t *pkt;
5090         struct fc_port *sess = NULL;
5091         unsigned long flags;
5092         u16 temp;
5093
5094         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5095         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5096             atio->u.isp24.fcp_hdr.s_id);
5097         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5098         if (!sess) {
5099                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5100                 return 0;
5101         }
5102         /* Sending marker isn't necessary, since we called from ISR */
5103
5104         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5105         if (!pkt) {
5106                 ql_dbg(ql_dbg_io, vha, 0x3063,
5107                     "qla_target(%d): %s failed: unable to allocate "
5108                     "request packet", vha->vp_idx, __func__);
5109                 return -ENOMEM;
5110         }
5111
5112         qpair->tgt_counters.num_q_full_sent++;
5113         pkt->entry_count = 1;
5114         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5115
5116         ctio24 = (struct ctio7_to_24xx *)pkt;
5117         ctio24->entry_type = CTIO_TYPE7;
5118         ctio24->nport_handle = sess->loop_id;
5119         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5120         ctio24->vp_index = vha->vp_idx;
5121         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5122         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5123         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5124         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5125         temp = (atio->u.isp24.attr << 9) |
5126                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5127                 CTIO7_FLAGS_DONT_RET_CTIO;
5128         ctio24->u.status1.flags = cpu_to_le16(temp);
5129         /*
5130          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5131          * if the explicit conformation is used.
5132          */
5133         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5134         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5135         /* Memory Barrier */
5136         wmb();
5137         if (qpair->reqq_start_iocbs)
5138                 qpair->reqq_start_iocbs(qpair);
5139         else
5140                 qla2x00_start_iocbs(vha, qpair->req);
5141         return 0;
5142 }
5143
5144 /*
5145  * This routine is used to allocate a command for either a QFull condition
5146  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5147  * out previously.
5148  */
5149 static void
5150 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5151         struct atio_from_isp *atio, uint16_t status, int qfull)
5152 {
5153         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5154         struct qla_hw_data *ha = vha->hw;
5155         struct fc_port *sess;
5156         struct se_session *se_sess;
5157         struct qla_tgt_cmd *cmd;
5158         int tag;
5159         unsigned long flags;
5160
5161         if (unlikely(tgt->tgt_stop)) {
5162                 ql_dbg(ql_dbg_io, vha, 0x300a,
5163                         "New command while device %p is shutting down\n", tgt);
5164                 return;
5165         }
5166
5167         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5168                 vha->hw->tgt.num_qfull_cmds_dropped++;
5169                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5170                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5171                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5172                                 vha->hw->tgt.num_qfull_cmds_dropped;
5173
5174                 ql_dbg(ql_dbg_io, vha, 0x3068,
5175                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5176                         vha->vp_idx, __func__,
5177                         vha->hw->tgt.num_qfull_cmds_dropped);
5178
5179                 qlt_chk_exch_leak_thresh_hold(vha);
5180                 return;
5181         }
5182
5183         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5184                 (vha, atio->u.isp24.fcp_hdr.s_id);
5185         if (!sess)
5186                 return;
5187
5188         se_sess = sess->se_sess;
5189
5190         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5191         if (tag < 0)
5192                 return;
5193
5194         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5195         if (!cmd) {
5196                 ql_dbg(ql_dbg_io, vha, 0x3009,
5197                         "qla_target(%d): %s: Allocation of cmd failed\n",
5198                         vha->vp_idx, __func__);
5199
5200                 vha->hw->tgt.num_qfull_cmds_dropped++;
5201                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5202                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5203                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5204                                 vha->hw->tgt.num_qfull_cmds_dropped;
5205
5206                 qlt_chk_exch_leak_thresh_hold(vha);
5207                 return;
5208         }
5209
5210         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5211
5212         qlt_incr_num_pend_cmds(vha);
5213         INIT_LIST_HEAD(&cmd->cmd_list);
5214         memcpy(&cmd->atio, atio, sizeof(*atio));
5215
5216         cmd->tgt = vha->vha_tgt.qla_tgt;
5217         cmd->vha = vha;
5218         cmd->reset_count = ha->base_qpair->chip_reset;
5219         cmd->q_full = 1;
5220         cmd->qpair = ha->base_qpair;
5221
5222         if (qfull) {
5223                 cmd->q_full = 1;
5224                 /* NOTE: borrowing the state field to carry the status */
5225                 cmd->state = status;
5226         } else
5227                 cmd->term_exchg = 1;
5228
5229         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5230         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5231
5232         vha->hw->tgt.num_qfull_cmds_alloc++;
5233         if (vha->hw->tgt.num_qfull_cmds_alloc >
5234                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5235                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5236                         vha->hw->tgt.num_qfull_cmds_alloc;
5237         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5238 }
5239
5240 int
5241 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5242 {
5243         struct scsi_qla_host *vha = qpair->vha;
5244         struct qla_hw_data *ha = vha->hw;
5245         unsigned long flags;
5246         struct qla_tgt_cmd *cmd, *tcmd;
5247         struct list_head free_list, q_full_list;
5248         int rc = 0;
5249
5250         if (list_empty(&ha->tgt.q_full_list))
5251                 return 0;
5252
5253         INIT_LIST_HEAD(&free_list);
5254         INIT_LIST_HEAD(&q_full_list);
5255
5256         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5257         if (list_empty(&ha->tgt.q_full_list)) {
5258                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5259                 return 0;
5260         }
5261
5262         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5263         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5264
5265         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5266         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5267                 if (cmd->q_full)
5268                         /* cmd->state is a borrowed field to hold status */
5269                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5270                 else if (cmd->term_exchg)
5271                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5272
5273                 if (rc == -ENOMEM)
5274                         break;
5275
5276                 if (cmd->q_full)
5277                         ql_dbg(ql_dbg_io, vha, 0x3006,
5278                             "%s: busy sent for ox_id[%04x]\n", __func__,
5279                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5280                 else if (cmd->term_exchg)
5281                         ql_dbg(ql_dbg_io, vha, 0x3007,
5282                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5283                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5284                 else
5285                         ql_dbg(ql_dbg_io, vha, 0x3008,
5286                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5287                             cmd);
5288
5289                 list_del(&cmd->cmd_list);
5290                 list_add_tail(&cmd->cmd_list, &free_list);
5291
5292                 /* piggy back on hardware_lock for protection */
5293                 vha->hw->tgt.num_qfull_cmds_alloc--;
5294         }
5295         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5296
5297         cmd = NULL;
5298
5299         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5300                 list_del(&cmd->cmd_list);
5301                 /* This cmd was never sent to TCM.  There is no need
5302                  * to schedule free or call free_cmd
5303                  */
5304                 qlt_free_cmd(cmd);
5305         }
5306
5307         if (!list_empty(&q_full_list)) {
5308                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5309                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5310                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5311         }
5312
5313         return rc;
5314 }
5315
5316 static void
5317 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5318     uint16_t status)
5319 {
5320         int rc = 0;
5321         struct scsi_qla_host *vha = qpair->vha;
5322
5323         rc = __qlt_send_busy(qpair, atio, status);
5324         if (rc == -ENOMEM)
5325                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5326 }
5327
5328 static int
5329 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5330         struct atio_from_isp *atio, uint8_t ha_locked)
5331 {
5332         struct qla_hw_data *ha = vha->hw;
5333         uint16_t status;
5334         unsigned long flags;
5335
5336         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5337                 return 0;
5338
5339         if (!ha_locked)
5340                 spin_lock_irqsave(&ha->hardware_lock, flags);
5341         status = temp_sam_status;
5342         qlt_send_busy(qpair, atio, status);
5343         if (!ha_locked)
5344                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5345
5346         return 1;
5347 }
5348
5349 /* ha->hardware_lock supposed to be held on entry */
5350 /* called via callback from qla2xxx */
5351 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5352         struct atio_from_isp *atio, uint8_t ha_locked)
5353 {
5354         struct qla_hw_data *ha = vha->hw;
5355         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5356         int rc;
5357         unsigned long flags;
5358
5359         if (unlikely(tgt == NULL)) {
5360                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5361                     "ATIO pkt, but no tgt (ha %p)", ha);
5362                 return;
5363         }
5364         /*
5365          * In tgt_stop mode we also should allow all requests to pass.
5366          * Otherwise, some commands can stuck.
5367          */
5368
5369         tgt->atio_irq_cmd_count++;
5370
5371         switch (atio->u.raw.entry_type) {
5372         case ATIO_TYPE7:
5373                 if (unlikely(atio->u.isp24.exchange_addr ==
5374                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5375                         ql_dbg(ql_dbg_io, vha, 0x3065,
5376                             "qla_target(%d): ATIO_TYPE7 "
5377                             "received with UNKNOWN exchange address, "
5378                             "sending QUEUE_FULL\n", vha->vp_idx);
5379                         if (!ha_locked)
5380                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5381                         qlt_send_busy(ha->base_qpair, atio,
5382                             SAM_STAT_TASK_SET_FULL);
5383                         if (!ha_locked)
5384                                 spin_unlock_irqrestore(&ha->hardware_lock,
5385                                     flags);
5386                         break;
5387                 }
5388
5389                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5390                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5391                             atio, ha_locked);
5392                         if (rc != 0) {
5393                                 tgt->atio_irq_cmd_count--;
5394                                 return;
5395                         }
5396                         rc = qlt_handle_cmd_for_atio(vha, atio);
5397                 } else {
5398                         rc = qlt_handle_task_mgmt(vha, atio);
5399                 }
5400                 if (unlikely(rc != 0)) {
5401                         if (rc == -ESRCH) {
5402                                 if (!ha_locked)
5403                                         spin_lock_irqsave(&ha->hardware_lock,
5404                                             flags);
5405
5406 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5407                                 qlt_send_busy(ha->base_qpair, atio,
5408                                     SAM_STAT_BUSY);
5409 #else
5410                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5411                                     atio, 1, 0);
5412 #endif
5413                                 if (!ha_locked)
5414                                         spin_unlock_irqrestore(
5415                                             &ha->hardware_lock, flags);
5416                         } else {
5417                                 if (tgt->tgt_stop) {
5418                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5419                                             "qla_target: Unable to send "
5420                                             "command to target for req, "
5421                                             "ignoring.\n");
5422                                 } else {
5423                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5424                                             "qla_target(%d): Unable to send "
5425                                             "command to target, sending BUSY "
5426                                             "status.\n", vha->vp_idx);
5427                                         if (!ha_locked)
5428                                                 spin_lock_irqsave(
5429                                                     &ha->hardware_lock, flags);
5430                                         qlt_send_busy(ha->base_qpair,
5431                                             atio, SAM_STAT_BUSY);
5432                                         if (!ha_locked)
5433                                                 spin_unlock_irqrestore(
5434                                                     &ha->hardware_lock, flags);
5435                                 }
5436                         }
5437                 }
5438                 break;
5439
5440         case IMMED_NOTIFY_TYPE:
5441         {
5442                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5443                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5444                             "qla_target(%d): Received ATIO packet %x "
5445                             "with error status %x\n", vha->vp_idx,
5446                             atio->u.raw.entry_type,
5447                             atio->u.isp2x.entry_status);
5448                         break;
5449                 }
5450                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5451
5452                 if (!ha_locked)
5453                         spin_lock_irqsave(&ha->hardware_lock, flags);
5454                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5455                 if (!ha_locked)
5456                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5457                 break;
5458         }
5459
5460         default:
5461                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5462                     "qla_target(%d): Received unknown ATIO atio "
5463                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5464                 break;
5465         }
5466
5467         tgt->atio_irq_cmd_count--;
5468 }
5469
5470 /* ha->hardware_lock supposed to be held on entry */
5471 /* called via callback from qla2xxx */
5472 static void qlt_response_pkt(struct scsi_qla_host *vha,
5473         struct rsp_que *rsp, response_t *pkt)
5474 {
5475         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5476
5477         if (unlikely(tgt == NULL)) {
5478                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5479                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5480                     vha->vp_idx, pkt->entry_type, vha->hw);
5481                 return;
5482         }
5483
5484         /*
5485          * In tgt_stop mode we also should allow all requests to pass.
5486          * Otherwise, some commands can stuck.
5487          */
5488
5489         switch (pkt->entry_type) {
5490         case CTIO_CRC2:
5491         case CTIO_TYPE7:
5492         {
5493                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5494                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5495                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5496                     entry);
5497                 break;
5498         }
5499
5500         case ACCEPT_TGT_IO_TYPE:
5501         {
5502                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5503                 int rc;
5504                 if (atio->u.isp2x.status !=
5505                     cpu_to_le16(ATIO_CDB_VALID)) {
5506                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5507                             "qla_target(%d): ATIO with error "
5508                             "status %x received\n", vha->vp_idx,
5509                             le16_to_cpu(atio->u.isp2x.status));
5510                         break;
5511                 }
5512
5513                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5514                 if (rc != 0)
5515                         return;
5516
5517                 rc = qlt_handle_cmd_for_atio(vha, atio);
5518                 if (unlikely(rc != 0)) {
5519                         if (rc == -ESRCH) {
5520 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5521                                 qlt_send_busy(rsp->qpair, atio, 0);
5522 #else
5523                                 qlt_send_term_exchange(rsp->qpair, NULL, atio, 1, 0);
5524 #endif
5525                         } else {
5526                                 if (tgt->tgt_stop) {
5527                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5528                                             "qla_target: Unable to send "
5529                                             "command to target, sending TERM "
5530                                             "EXCHANGE for rsp\n");
5531                                         qlt_send_term_exchange(rsp->qpair, NULL,
5532                                             atio, 1, 0);
5533                                 } else {
5534                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5535                                             "qla_target(%d): Unable to send "
5536                                             "command to target, sending BUSY "
5537                                             "status\n", vha->vp_idx);
5538                                         qlt_send_busy(rsp->qpair, atio, 0);
5539                                 }
5540                         }
5541                 }
5542         }
5543         break;
5544
5545         case CONTINUE_TGT_IO_TYPE:
5546         {
5547                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5548                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5549                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5550                     entry);
5551                 break;
5552         }
5553
5554         case CTIO_A64_TYPE:
5555         {
5556                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5557                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5558                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5559                     entry);
5560                 break;
5561         }
5562
5563         case IMMED_NOTIFY_TYPE:
5564                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5565                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5566                 break;
5567
5568         case NOTIFY_ACK_TYPE:
5569                 if (tgt->notify_ack_expected > 0) {
5570                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5571                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5572                             "NOTIFY_ACK seq %08x status %x\n",
5573                             le16_to_cpu(entry->u.isp2x.seq_id),
5574                             le16_to_cpu(entry->u.isp2x.status));
5575                         tgt->notify_ack_expected--;
5576                         if (entry->u.isp2x.status !=
5577                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5578                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5579                                     "qla_target(%d): NOTIFY_ACK "
5580                                     "failed %x\n", vha->vp_idx,
5581                                     le16_to_cpu(entry->u.isp2x.status));
5582                         }
5583                 } else {
5584                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5585                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5586                             vha->vp_idx);
5587                 }
5588                 break;
5589
5590         case ABTS_RECV_24XX:
5591                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5592                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5593                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5594                 break;
5595
5596         case ABTS_RESP_24XX:
5597                 if (tgt->abts_resp_expected > 0) {
5598                         struct abts_resp_from_24xx_fw *entry =
5599                                 (struct abts_resp_from_24xx_fw *)pkt;
5600                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5601                             "ABTS_RESP_24XX: compl_status %x\n",
5602                             entry->compl_status);
5603                         tgt->abts_resp_expected--;
5604                         if (le16_to_cpu(entry->compl_status) !=
5605                             ABTS_RESP_COMPL_SUCCESS) {
5606                                 if ((entry->error_subcode1 == 0x1E) &&
5607                                     (entry->error_subcode2 == 0)) {
5608                                         /*
5609                                          * We've got a race here: aborted
5610                                          * exchange not terminated, i.e.
5611                                          * response for the aborted command was
5612                                          * sent between the abort request was
5613                                          * received and processed.
5614                                          * Unfortunately, the firmware has a
5615                                          * silly requirement that all aborted
5616                                          * exchanges must be explicitely
5617                                          * terminated, otherwise it refuses to
5618                                          * send responses for the abort
5619                                          * requests. So, we have to
5620                                          * (re)terminate the exchange and retry
5621                                          * the abort response.
5622                                          */
5623                                         qlt_24xx_retry_term_exchange(vha,
5624                                             entry);
5625                                 } else
5626                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5627                                             "qla_target(%d): ABTS_RESP_24XX "
5628                                             "failed %x (subcode %x:%x)",
5629                                             vha->vp_idx, entry->compl_status,
5630                                             entry->error_subcode1,
5631                                             entry->error_subcode2);
5632                         }
5633                 } else {
5634                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5635                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5636                             "received\n", vha->vp_idx);
5637                 }
5638                 break;
5639
5640         default:
5641                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5642                     "qla_target(%d): Received unknown response pkt "
5643                     "type %x\n", vha->vp_idx, pkt->entry_type);
5644                 break;
5645         }
5646
5647 }
5648
5649 /*
5650  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5651  */
5652 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5653         uint16_t *mailbox)
5654 {
5655         struct qla_hw_data *ha = vha->hw;
5656         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5657         int login_code;
5658
5659         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5660                 return;
5661
5662         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5663             IS_QLA2100(ha))
5664                 return;
5665         /*
5666          * In tgt_stop mode we also should allow all requests to pass.
5667          * Otherwise, some commands can stuck.
5668          */
5669
5670
5671         switch (code) {
5672         case MBA_RESET:                 /* Reset */
5673         case MBA_SYSTEM_ERR:            /* System Error */
5674         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5675         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5676                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5677                     "qla_target(%d): System error async event %#x "
5678                     "occurred", vha->vp_idx, code);
5679                 break;
5680         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5681                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5682                 break;
5683
5684         case MBA_LOOP_UP:
5685         {
5686                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5687                     "qla_target(%d): Async LOOP_UP occurred "
5688                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5689                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5690                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5691                 if (tgt->link_reinit_iocb_pending) {
5692                         qlt_send_notify_ack(ha->base_qpair,
5693                             (void *)&tgt->link_reinit_iocb,
5694                             0, 0, 0, 0, 0, 0);
5695                         tgt->link_reinit_iocb_pending = 0;
5696                 }
5697                 break;
5698         }
5699
5700         case MBA_LIP_OCCURRED:
5701         case MBA_LOOP_DOWN:
5702         case MBA_LIP_RESET:
5703         case MBA_RSCN_UPDATE:
5704                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5705                     "qla_target(%d): Async event %#x occurred "
5706                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5707                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5708                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5709                 break;
5710
5711         case MBA_REJECTED_FCP_CMD:
5712                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5713                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5714                     vha->vp_idx,
5715                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5716                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5717
5718                 if (le16_to_cpu(mailbox[3]) == 1) {
5719                         /* exchange starvation. */
5720                         vha->hw->exch_starvation++;
5721                         if (vha->hw->exch_starvation > 5) {
5722                                 ql_log(ql_log_warn, vha, 0xd03a,
5723                                     "Exchange starvation-. Resetting RISC\n");
5724
5725                                 vha->hw->exch_starvation = 0;
5726                                 if (IS_P3P_TYPE(vha->hw))
5727                                         set_bit(FCOE_CTX_RESET_NEEDED,
5728                                             &vha->dpc_flags);
5729                                 else
5730                                         set_bit(ISP_ABORT_NEEDED,
5731                                             &vha->dpc_flags);
5732                                 qla2xxx_wake_dpc(vha);
5733                         }
5734                 }
5735                 break;
5736
5737         case MBA_PORT_UPDATE:
5738                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5739                     "qla_target(%d): Port update async event %#x "
5740                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5741                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5742                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5743                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5744
5745                 login_code = le16_to_cpu(mailbox[2]);
5746                 if (login_code == 0x4) {
5747                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5748                             "Async MB 2: Got PLOGI Complete\n");
5749                         vha->hw->exch_starvation = 0;
5750                 } else if (login_code == 0x7)
5751                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5752                             "Async MB 2: Port Logged Out\n");
5753                 break;
5754         default:
5755                 break;
5756         }
5757
5758 }
5759
5760 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5761         uint16_t loop_id)
5762 {
5763         fc_port_t *fcport, *tfcp, *del;
5764         int rc;
5765         unsigned long flags;
5766         u8 newfcport = 0;
5767
5768         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
5769         if (!fcport) {
5770                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5771                     "qla_target(%d): Allocation of tmp FC port failed",
5772                     vha->vp_idx);
5773                 return NULL;
5774         }
5775
5776         fcport->loop_id = loop_id;
5777
5778         rc = qla24xx_gpdb_wait(vha, fcport, 0);
5779         if (rc != QLA_SUCCESS) {
5780                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5781                     "qla_target(%d): Failed to retrieve fcport "
5782                     "information -- get_port_database() returned %x "
5783                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5784                 kfree(fcport);
5785                 return NULL;
5786         }
5787
5788         del = NULL;
5789         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5790         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5791
5792         if (tfcp) {
5793                 tfcp->d_id = fcport->d_id;
5794                 tfcp->port_type = fcport->port_type;
5795                 tfcp->supported_classes = fcport->supported_classes;
5796                 tfcp->flags |= fcport->flags;
5797                 tfcp->scan_state = QLA_FCPORT_FOUND;
5798
5799                 del = fcport;
5800                 fcport = tfcp;
5801         } else {
5802                 if (vha->hw->current_topology == ISP_CFG_F)
5803                         fcport->flags |= FCF_FABRIC_DEVICE;
5804
5805                 list_add_tail(&fcport->list, &vha->vp_fcports);
5806                 if (!IS_SW_RESV_ADDR(fcport->d_id))
5807                    vha->fcport_count++;
5808                 fcport->login_gen++;
5809                 fcport->disc_state = DSC_LOGIN_COMPLETE;
5810                 fcport->login_succ = 1;
5811                 newfcport = 1;
5812         }
5813
5814         fcport->deleted = 0;
5815         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
5816
5817         switch (vha->host->active_mode) {
5818         case MODE_INITIATOR:
5819         case MODE_DUAL:
5820                 if (newfcport) {
5821                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5822                                 ql_dbg(ql_dbg_disc, vha, 0x20fe,
5823                                    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
5824                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5825                                 qla24xx_post_upd_fcport_work(vha, fcport);
5826                         } else {
5827                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
5828                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
5829                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5830                                 qla24xx_post_gpsc_work(vha, fcport);
5831                         }
5832                 }
5833                 break;
5834
5835         case MODE_TARGET:
5836         default:
5837                 break;
5838         }
5839         if (del)
5840                 qla2x00_free_fcport(del);
5841
5842         return fcport;
5843 }
5844
5845 /* Must be called under tgt_mutex */
5846 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5847         uint8_t *s_id)
5848 {
5849         struct fc_port *sess = NULL;
5850         fc_port_t *fcport = NULL;
5851         int rc, global_resets;
5852         uint16_t loop_id = 0;
5853
5854         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
5855                 /*
5856                  * This is Domain Controller, so it should be
5857                  * OK to drop SCSI commands from it.
5858                  */
5859                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5860                     "Unable to find initiator with S_ID %x:%x:%x",
5861                     s_id[0], s_id[1], s_id[2]);
5862                 return NULL;
5863         }
5864
5865         mutex_lock(&vha->vha_tgt.tgt_mutex);
5866
5867 retry:
5868         global_resets =
5869             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5870
5871         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5872         if (rc != 0) {
5873                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5874
5875                 ql_log(ql_log_info, vha, 0xf071,
5876                     "qla_target(%d): Unable to find "
5877                     "initiator with S_ID %x:%x:%x",
5878                     vha->vp_idx, s_id[0], s_id[1],
5879                     s_id[2]);
5880
5881                 if (rc == -ENOENT) {
5882                         qlt_port_logo_t logo;
5883                         sid_to_portid(s_id, &logo.id);
5884                         logo.cmd_count = 1;
5885                         qlt_send_first_logo(vha, &logo);
5886                 }
5887
5888                 return NULL;
5889         }
5890
5891         fcport = qlt_get_port_database(vha, loop_id);
5892         if (!fcport) {
5893                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5894                 return NULL;
5895         }
5896
5897         if (global_resets !=
5898             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5899                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5900                     "qla_target(%d): global reset during session discovery "
5901                     "(counter was %d, new %d), retrying", vha->vp_idx,
5902                     global_resets,
5903                     atomic_read(&vha->vha_tgt.
5904                         qla_tgt->tgt_global_resets_count));
5905                 goto retry;
5906         }
5907
5908         sess = qlt_create_sess(vha, fcport, true);
5909
5910         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5911
5912         return sess;
5913 }
5914
5915 static void qlt_abort_work(struct qla_tgt *tgt,
5916         struct qla_tgt_sess_work_param *prm)
5917 {
5918         struct scsi_qla_host *vha = tgt->vha;
5919         struct qla_hw_data *ha = vha->hw;
5920         struct fc_port *sess = NULL;
5921         unsigned long flags = 0, flags2 = 0;
5922         uint8_t s_id[3];
5923         int rc;
5924
5925         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5926
5927         if (tgt->tgt_stop)
5928                 goto out_term2;
5929
5930         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5931         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5932         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5933
5934         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5935         if (!sess) {
5936                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5937
5938                 sess = qlt_make_local_sess(vha, s_id);
5939                 /* sess has got an extra creation ref */
5940
5941                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5942                 if (!sess)
5943                         goto out_term2;
5944         } else {
5945                 if (sess->deleted) {
5946                         sess = NULL;
5947                         goto out_term2;
5948                 }
5949
5950                 if (!kref_get_unless_zero(&sess->sess_kref)) {
5951                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
5952                             "%s: kref_get fail %8phC \n",
5953                              __func__, sess->port_name);
5954                         sess = NULL;
5955                         goto out_term2;
5956                 }
5957         }
5958
5959         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5960         ha->tgt.tgt_ops->put_sess(sess);
5961         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5962
5963         if (rc != 0)
5964                 goto out_term;
5965         return;
5966
5967 out_term2:
5968         if (sess)
5969                 ha->tgt.tgt_ops->put_sess(sess);
5970         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5971
5972 out_term:
5973         spin_lock_irqsave(&ha->hardware_lock, flags);
5974         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
5975             FCP_TMF_REJECTED, false);
5976         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5977 }
5978
5979 static void qlt_tmr_work(struct qla_tgt *tgt,
5980         struct qla_tgt_sess_work_param *prm)
5981 {
5982         struct atio_from_isp *a = &prm->tm_iocb2;
5983         struct scsi_qla_host *vha = tgt->vha;
5984         struct qla_hw_data *ha = vha->hw;
5985         struct fc_port *sess = NULL;
5986         unsigned long flags;
5987         uint8_t *s_id = NULL; /* to hide compiler warnings */
5988         int rc;
5989         u64 unpacked_lun;
5990         int fn;
5991         void *iocb;
5992
5993         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5994
5995         if (tgt->tgt_stop)
5996                 goto out_term2;
5997
5998         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5999         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6000         if (!sess) {
6001                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6002
6003                 sess = qlt_make_local_sess(vha, s_id);
6004                 /* sess has got an extra creation ref */
6005
6006                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6007                 if (!sess)
6008                         goto out_term2;
6009         } else {
6010                 if (sess->deleted) {
6011                         sess = NULL;
6012                         goto out_term2;
6013                 }
6014
6015                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6016                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6017                             "%s: kref_get fail %8phC\n",
6018                              __func__, sess->port_name);
6019                         sess = NULL;
6020                         goto out_term2;
6021                 }
6022         }
6023
6024         iocb = a;
6025         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6026         unpacked_lun =
6027             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6028
6029         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6030         ha->tgt.tgt_ops->put_sess(sess);
6031         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6032
6033         if (rc != 0)
6034                 goto out_term;
6035         return;
6036
6037 out_term2:
6038         if (sess)
6039                 ha->tgt.tgt_ops->put_sess(sess);
6040         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6041 out_term:
6042         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6043 }
6044
6045 static void qlt_sess_work_fn(struct work_struct *work)
6046 {
6047         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6048         struct scsi_qla_host *vha = tgt->vha;
6049         unsigned long flags;
6050
6051         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6052
6053         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6054         while (!list_empty(&tgt->sess_works_list)) {
6055                 struct qla_tgt_sess_work_param *prm = list_entry(
6056                     tgt->sess_works_list.next, typeof(*prm),
6057                     sess_works_list_entry);
6058
6059                 /*
6060                  * This work can be scheduled on several CPUs at time, so we
6061                  * must delete the entry to eliminate double processing
6062                  */
6063                 list_del(&prm->sess_works_list_entry);
6064
6065                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6066
6067                 switch (prm->type) {
6068                 case QLA_TGT_SESS_WORK_ABORT:
6069                         qlt_abort_work(tgt, prm);
6070                         break;
6071                 case QLA_TGT_SESS_WORK_TM:
6072                         qlt_tmr_work(tgt, prm);
6073                         break;
6074                 default:
6075                         BUG_ON(1);
6076                         break;
6077                 }
6078
6079                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6080
6081                 kfree(prm);
6082         }
6083         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6084 }
6085
6086 /* Must be called under tgt_host_action_mutex */
6087 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6088 {
6089         struct qla_tgt *tgt;
6090         int rc, i;
6091         struct qla_qpair_hint *h;
6092
6093         if (!QLA_TGT_MODE_ENABLED())
6094                 return 0;
6095
6096         if (!IS_TGT_MODE_CAPABLE(ha)) {
6097                 ql_log(ql_log_warn, base_vha, 0xe070,
6098                     "This adapter does not support target mode.\n");
6099                 return 0;
6100         }
6101
6102         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6103             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6104
6105         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6106
6107         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6108         if (!tgt) {
6109                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6110                     "Unable to allocate struct qla_tgt\n");
6111                 return -ENOMEM;
6112         }
6113
6114         tgt->qphints = kzalloc((ha->max_qpairs + 1) *
6115             sizeof(struct qla_qpair_hint), GFP_KERNEL);
6116         if (!tgt->qphints) {
6117                 kfree(tgt);
6118                 ql_log(ql_log_warn, base_vha, 0x0197,
6119                     "Unable to allocate qpair hints.\n");
6120                 return -ENOMEM;
6121         }
6122
6123         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6124                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6125
6126         rc = btree_init64(&tgt->lun_qpair_map);
6127         if (rc) {
6128                 kfree(tgt->qphints);
6129                 kfree(tgt);
6130                 ql_log(ql_log_info, base_vha, 0x0198,
6131                         "Unable to initialize lun_qpair_map btree\n");
6132                 return -EIO;
6133         }
6134         h = &tgt->qphints[0];
6135         h->qpair = ha->base_qpair;
6136         INIT_LIST_HEAD(&h->hint_elem);
6137         h->cpuid = ha->base_qpair->cpuid;
6138         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6139
6140         for (i = 0; i < ha->max_qpairs; i++) {
6141                 unsigned long flags;
6142
6143                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6144                 h = &tgt->qphints[i + 1];
6145                 INIT_LIST_HEAD(&h->hint_elem);
6146                 if (qpair) {
6147                         h->qpair = qpair;
6148                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6149                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6150                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6151                         h->cpuid = qpair->cpuid;
6152                 }
6153         }
6154
6155         tgt->ha = ha;
6156         tgt->vha = base_vha;
6157         init_waitqueue_head(&tgt->waitQ);
6158         INIT_LIST_HEAD(&tgt->del_sess_list);
6159         spin_lock_init(&tgt->sess_work_lock);
6160         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6161         INIT_LIST_HEAD(&tgt->sess_works_list);
6162         atomic_set(&tgt->tgt_global_resets_count, 0);
6163
6164         base_vha->vha_tgt.qla_tgt = tgt;
6165
6166         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6167                 "qla_target(%d): using 64 Bit PCI addressing",
6168                 base_vha->vp_idx);
6169         /* 3 is reserved */
6170         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6171
6172         mutex_lock(&qla_tgt_mutex);
6173         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6174         mutex_unlock(&qla_tgt_mutex);
6175
6176         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6177                 ha->tgt.tgt_ops->add_target(base_vha);
6178
6179         return 0;
6180 }
6181
6182 /* Must be called under tgt_host_action_mutex */
6183 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6184 {
6185         if (!vha->vha_tgt.qla_tgt)
6186                 return 0;
6187
6188         if (vha->fc_vport) {
6189                 qlt_release(vha->vha_tgt.qla_tgt);
6190                 return 0;
6191         }
6192
6193         /* free left over qfull cmds */
6194         qlt_init_term_exchange(vha);
6195
6196         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6197             vha->host_no, ha);
6198         qlt_release(vha->vha_tgt.qla_tgt);
6199
6200         return 0;
6201 }
6202
6203 void qlt_remove_target_resources(struct qla_hw_data *ha)
6204 {
6205         struct scsi_qla_host *node;
6206         u32 key = 0;
6207
6208         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6209                 btree_remove32(&ha->tgt.host_map, key);
6210
6211         btree_destroy32(&ha->tgt.host_map);
6212 }
6213
6214 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6215         unsigned char *b)
6216 {
6217         int i;
6218
6219         pr_debug("qla2xxx HW vha->node_name: ");
6220         for (i = 0; i < WWN_SIZE; i++)
6221                 pr_debug("%02x ", vha->node_name[i]);
6222         pr_debug("\n");
6223         pr_debug("qla2xxx HW vha->port_name: ");
6224         for (i = 0; i < WWN_SIZE; i++)
6225                 pr_debug("%02x ", vha->port_name[i]);
6226         pr_debug("\n");
6227
6228         pr_debug("qla2xxx passed configfs WWPN: ");
6229         put_unaligned_be64(wwpn, b);
6230         for (i = 0; i < WWN_SIZE; i++)
6231                 pr_debug("%02x ", b[i]);
6232         pr_debug("\n");
6233 }
6234
6235 /**
6236  * qla_tgt_lport_register - register lport with external module
6237  *
6238  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6239  * @wwpn: Passwd FC target WWPN
6240  * @callback:  lport initialization callback for tcm_qla2xxx code
6241  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6242  */
6243 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6244                        u64 npiv_wwpn, u64 npiv_wwnn,
6245                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6246 {
6247         struct qla_tgt *tgt;
6248         struct scsi_qla_host *vha;
6249         struct qla_hw_data *ha;
6250         struct Scsi_Host *host;
6251         unsigned long flags;
6252         int rc;
6253         u8 b[WWN_SIZE];
6254
6255         mutex_lock(&qla_tgt_mutex);
6256         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6257                 vha = tgt->vha;
6258                 ha = vha->hw;
6259
6260                 host = vha->host;
6261                 if (!host)
6262                         continue;
6263
6264                 if (!(host->hostt->supported_mode & MODE_TARGET))
6265                         continue;
6266
6267                 spin_lock_irqsave(&ha->hardware_lock, flags);
6268                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6269                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6270                             host->host_no);
6271                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6272                         continue;
6273                 }
6274                 if (tgt->tgt_stop) {
6275                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6276                                  host->host_no);
6277                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6278                         continue;
6279                 }
6280                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6281
6282                 if (!scsi_host_get(host)) {
6283                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6284                             "Unable to scsi_host_get() for"
6285                             " qla2xxx scsi_host\n");
6286                         continue;
6287                 }
6288                 qlt_lport_dump(vha, phys_wwpn, b);
6289
6290                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6291                         scsi_host_put(host);
6292                         continue;
6293                 }
6294                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6295                 if (rc != 0)
6296                         scsi_host_put(host);
6297
6298                 mutex_unlock(&qla_tgt_mutex);
6299                 return rc;
6300         }
6301         mutex_unlock(&qla_tgt_mutex);
6302
6303         return -ENODEV;
6304 }
6305 EXPORT_SYMBOL(qlt_lport_register);
6306
6307 /**
6308  * qla_tgt_lport_deregister - Degister lport
6309  *
6310  * @vha:  Registered scsi_qla_host pointer
6311  */
6312 void qlt_lport_deregister(struct scsi_qla_host *vha)
6313 {
6314         struct qla_hw_data *ha = vha->hw;
6315         struct Scsi_Host *sh = vha->host;
6316         /*
6317          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6318          */
6319         vha->vha_tgt.target_lport_ptr = NULL;
6320         ha->tgt.tgt_ops = NULL;
6321         /*
6322          * Release the Scsi_Host reference for the underlying qla2xxx host
6323          */
6324         scsi_host_put(sh);
6325 }
6326 EXPORT_SYMBOL(qlt_lport_deregister);
6327
6328 /* Must be called under HW lock */
6329 static void qlt_set_mode(struct scsi_qla_host *vha)
6330 {
6331         switch (ql2x_ini_mode) {
6332         case QLA2XXX_INI_MODE_DISABLED:
6333         case QLA2XXX_INI_MODE_EXCLUSIVE:
6334                 vha->host->active_mode = MODE_TARGET;
6335                 break;
6336         case QLA2XXX_INI_MODE_ENABLED:
6337                 vha->host->active_mode = MODE_UNKNOWN;
6338                 break;
6339         case QLA2XXX_INI_MODE_DUAL:
6340                 vha->host->active_mode = MODE_DUAL;
6341                 break;
6342         default:
6343                 break;
6344         }
6345 }
6346
6347 /* Must be called under HW lock */
6348 static void qlt_clear_mode(struct scsi_qla_host *vha)
6349 {
6350         switch (ql2x_ini_mode) {
6351         case QLA2XXX_INI_MODE_DISABLED:
6352                 vha->host->active_mode = MODE_UNKNOWN;
6353                 break;
6354         case QLA2XXX_INI_MODE_EXCLUSIVE:
6355                 vha->host->active_mode = MODE_INITIATOR;
6356                 break;
6357         case QLA2XXX_INI_MODE_ENABLED:
6358         case QLA2XXX_INI_MODE_DUAL:
6359                 vha->host->active_mode = MODE_INITIATOR;
6360                 break;
6361         default:
6362                 break;
6363         }
6364 }
6365
6366 /*
6367  * qla_tgt_enable_vha - NO LOCK HELD
6368  *
6369  * host_reset, bring up w/ Target Mode Enabled
6370  */
6371 void
6372 qlt_enable_vha(struct scsi_qla_host *vha)
6373 {
6374         struct qla_hw_data *ha = vha->hw;
6375         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6376         unsigned long flags;
6377         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6378
6379         if (!tgt) {
6380                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6381                     "Unable to locate qla_tgt pointer from"
6382                     " struct qla_hw_data\n");
6383                 dump_stack();
6384                 return;
6385         }
6386
6387         spin_lock_irqsave(&ha->hardware_lock, flags);
6388         tgt->tgt_stopped = 0;
6389         qlt_set_mode(vha);
6390         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6391
6392         if (vha->vp_idx) {
6393                 qla24xx_disable_vp(vha);
6394                 qla24xx_enable_vp(vha);
6395         } else {
6396                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6397                 qla2xxx_wake_dpc(base_vha);
6398                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6399                              QLA_SUCCESS);
6400         }
6401 }
6402 EXPORT_SYMBOL(qlt_enable_vha);
6403
6404 /*
6405  * qla_tgt_disable_vha - NO LOCK HELD
6406  *
6407  * Disable Target Mode and reset the adapter
6408  */
6409 static void qlt_disable_vha(struct scsi_qla_host *vha)
6410 {
6411         struct qla_hw_data *ha = vha->hw;
6412         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6413         unsigned long flags;
6414
6415         if (!tgt) {
6416                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6417                     "Unable to locate qla_tgt pointer from"
6418                     " struct qla_hw_data\n");
6419                 dump_stack();
6420                 return;
6421         }
6422
6423         spin_lock_irqsave(&ha->hardware_lock, flags);
6424         qlt_clear_mode(vha);
6425         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6426
6427         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6428         qla2xxx_wake_dpc(vha);
6429         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6430                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6431                        "qla2x00_wait_for_hba_online() failed\n");
6432 }
6433
6434 /*
6435  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6436  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6437  * members.
6438  */
6439 void
6440 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6441 {
6442         vha->vha_tgt.qla_tgt = NULL;
6443
6444         mutex_init(&vha->vha_tgt.tgt_mutex);
6445         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6446
6447         qlt_clear_mode(vha);
6448
6449         /*
6450          * NOTE: Currently the value is kept the same for <24xx and
6451          * >=24xx ISPs. If it is necessary to change it,
6452          * the check should be added for specific ISPs,
6453          * assigning the value appropriately.
6454          */
6455         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6456
6457         qlt_add_target(ha, vha);
6458 }
6459
6460 void
6461 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6462 {
6463         /*
6464          * FC-4 Feature bit 0 indicates target functionality to the name server.
6465          */
6466         if (qla_tgt_mode_enabled(vha)) {
6467                 ct_req->req.rff_id.fc4_feature = BIT_0;
6468         } else if (qla_ini_mode_enabled(vha)) {
6469                 ct_req->req.rff_id.fc4_feature = BIT_1;
6470         } else if (qla_dual_mode_enabled(vha))
6471                 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6472 }
6473
6474 /*
6475  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6476  * @ha: HA context
6477  *
6478  * Beginning of ATIO ring has initialization control block already built
6479  * by nvram config routine.
6480  *
6481  * Returns 0 on success.
6482  */
6483 void
6484 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6485 {
6486         struct qla_hw_data *ha = vha->hw;
6487         uint16_t cnt;
6488         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6489
6490         if (qla_ini_mode_enabled(vha))
6491                 return;
6492
6493         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6494                 pkt->u.raw.signature = ATIO_PROCESSED;
6495                 pkt++;
6496         }
6497
6498 }
6499
6500 /*
6501  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6502  * @ha: SCSI driver HA context
6503  */
6504 void
6505 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6506 {
6507         struct qla_hw_data *ha = vha->hw;
6508         struct atio_from_isp *pkt;
6509         int cnt, i;
6510
6511         if (!ha->flags.fw_started)
6512                 return;
6513
6514         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6515             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6516                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6517                 cnt = pkt->u.raw.entry_count;
6518
6519                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6520                         /*
6521                          * This packet is corrupted. The header + payload
6522                          * can not be trusted. There is no point in passing
6523                          * it further up.
6524                          */
6525                         ql_log(ql_log_warn, vha, 0xd03c,
6526                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6527                             pkt->u.isp24.fcp_hdr.s_id,
6528                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6529                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6530
6531                         adjust_corrupted_atio(pkt);
6532                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6533                             ha_locked, 0);
6534                 } else {
6535                         qlt_24xx_atio_pkt_all_vps(vha,
6536                             (struct atio_from_isp *)pkt, ha_locked);
6537                 }
6538
6539                 for (i = 0; i < cnt; i++) {
6540                         ha->tgt.atio_ring_index++;
6541                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6542                                 ha->tgt.atio_ring_index = 0;
6543                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6544                         } else
6545                                 ha->tgt.atio_ring_ptr++;
6546
6547                         pkt->u.raw.signature = ATIO_PROCESSED;
6548                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6549                 }
6550                 wmb();
6551         }
6552
6553         /* Adjust ring index */
6554         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6555 }
6556
6557 void
6558 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6559 {
6560         struct qla_hw_data *ha = vha->hw;
6561         if (!QLA_TGT_MODE_ENABLED())
6562                 return;
6563
6564         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6565         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6566         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6567
6568         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6569                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6570                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6571
6572                 icb->msix_atio = cpu_to_le16(msix->entry);
6573                 ql_dbg(ql_dbg_init, vha, 0xf072,
6574                     "Registering ICB vector 0x%x for atio que.\n",
6575                     msix->entry);
6576         }
6577 }
6578
6579 void
6580 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6581 {
6582         struct qla_hw_data *ha = vha->hw;
6583
6584         if (!QLA_TGT_MODE_ENABLED())
6585                 return;
6586
6587         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6588                 if (!ha->tgt.saved_set) {
6589                         /* We save only once */
6590                         ha->tgt.saved_exchange_count = nv->exchange_count;
6591                         ha->tgt.saved_firmware_options_1 =
6592                             nv->firmware_options_1;
6593                         ha->tgt.saved_firmware_options_2 =
6594                             nv->firmware_options_2;
6595                         ha->tgt.saved_firmware_options_3 =
6596                             nv->firmware_options_3;
6597                         ha->tgt.saved_set = 1;
6598                 }
6599
6600                 if (qla_tgt_mode_enabled(vha))
6601                         nv->exchange_count = cpu_to_le16(0xFFFF);
6602                 else                    /* dual */
6603                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6604
6605                 /* Enable target mode */
6606                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6607
6608                 /* Disable ini mode, if requested */
6609                 if (qla_tgt_mode_enabled(vha))
6610                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6611
6612                 /* Disable Full Login after LIP */
6613                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6614                 /* Enable initial LIP */
6615                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6616                 if (ql2xtgt_tape_enable)
6617                         /* Enable FC Tape support */
6618                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6619                 else
6620                         /* Disable FC Tape support */
6621                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6622
6623                 /* Disable Full Login after LIP */
6624                 nv->host_p &= cpu_to_le32(~BIT_10);
6625
6626                 /*
6627                  * clear BIT 15 explicitly as we have seen at least
6628                  * a couple of instances where this was set and this
6629                  * was causing the firmware to not be initialized.
6630                  */
6631                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6632                 /* Enable target PRLI control */
6633                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6634         } else {
6635                 if (ha->tgt.saved_set) {
6636                         nv->exchange_count = ha->tgt.saved_exchange_count;
6637                         nv->firmware_options_1 =
6638                             ha->tgt.saved_firmware_options_1;
6639                         nv->firmware_options_2 =
6640                             ha->tgt.saved_firmware_options_2;
6641                         nv->firmware_options_3 =
6642                             ha->tgt.saved_firmware_options_3;
6643                 }
6644                 return;
6645         }
6646
6647         if (ha->base_qpair->enable_class_2) {
6648                 if (vha->flags.init_done)
6649                         fc_host_supported_classes(vha->host) =
6650                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6651
6652                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6653         } else {
6654                 if (vha->flags.init_done)
6655                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6656
6657                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6658         }
6659 }
6660
6661 void
6662 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6663         struct init_cb_24xx *icb)
6664 {
6665         struct qla_hw_data *ha = vha->hw;
6666
6667         if (!QLA_TGT_MODE_ENABLED())
6668                 return;
6669
6670         if (ha->tgt.node_name_set) {
6671                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6672                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6673         }
6674
6675         /* disable ZIO at start time. */
6676         if (!vha->flags.init_done) {
6677                 uint32_t tmp;
6678                 tmp = le32_to_cpu(icb->firmware_options_2);
6679                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6680                 icb->firmware_options_2 = cpu_to_le32(tmp);
6681         }
6682 }
6683
6684 void
6685 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6686 {
6687         struct qla_hw_data *ha = vha->hw;
6688
6689         if (!QLA_TGT_MODE_ENABLED())
6690                 return;
6691
6692         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6693                 if (!ha->tgt.saved_set) {
6694                         /* We save only once */
6695                         ha->tgt.saved_exchange_count = nv->exchange_count;
6696                         ha->tgt.saved_firmware_options_1 =
6697                             nv->firmware_options_1;
6698                         ha->tgt.saved_firmware_options_2 =
6699                             nv->firmware_options_2;
6700                         ha->tgt.saved_firmware_options_3 =
6701                             nv->firmware_options_3;
6702                         ha->tgt.saved_set = 1;
6703                 }
6704
6705                 if (qla_tgt_mode_enabled(vha))
6706                         nv->exchange_count = cpu_to_le16(0xFFFF);
6707                 else                    /* dual */
6708                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6709
6710                 /* Enable target mode */
6711                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6712
6713                 /* Disable ini mode, if requested */
6714                 if (qla_tgt_mode_enabled(vha))
6715                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6716                 /* Disable Full Login after LIP */
6717                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6718                 /* Enable initial LIP */
6719                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6720                 /*
6721                  * clear BIT 15 explicitly as we have seen at
6722                  * least a couple of instances where this was set
6723                  * and this was causing the firmware to not be
6724                  * initialized.
6725                  */
6726                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6727                 if (ql2xtgt_tape_enable)
6728                         /* Enable FC tape support */
6729                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6730                 else
6731                         /* Disable FC tape support */
6732                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6733
6734                 /* Disable Full Login after LIP */
6735                 nv->host_p &= cpu_to_le32(~BIT_10);
6736                 /* Enable target PRLI control */
6737                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6738         } else {
6739                 if (ha->tgt.saved_set) {
6740                         nv->exchange_count = ha->tgt.saved_exchange_count;
6741                         nv->firmware_options_1 =
6742                             ha->tgt.saved_firmware_options_1;
6743                         nv->firmware_options_2 =
6744                             ha->tgt.saved_firmware_options_2;
6745                         nv->firmware_options_3 =
6746                             ha->tgt.saved_firmware_options_3;
6747                 }
6748                 return;
6749         }
6750
6751         if (ha->base_qpair->enable_class_2) {
6752                 if (vha->flags.init_done)
6753                         fc_host_supported_classes(vha->host) =
6754                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6755
6756                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6757         } else {
6758                 if (vha->flags.init_done)
6759                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6760
6761                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6762         }
6763 }
6764
6765 void
6766 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6767         struct init_cb_81xx *icb)
6768 {
6769         struct qla_hw_data *ha = vha->hw;
6770
6771         if (!QLA_TGT_MODE_ENABLED())
6772                 return;
6773
6774         if (ha->tgt.node_name_set) {
6775                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6776                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6777         }
6778
6779         /* disable ZIO at start time. */
6780         if (!vha->flags.init_done) {
6781                 uint32_t tmp;
6782                 tmp = le32_to_cpu(icb->firmware_options_2);
6783                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6784                 icb->firmware_options_2 = cpu_to_le32(tmp);
6785         }
6786
6787 }
6788
6789 void
6790 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6791 {
6792         if (!QLA_TGT_MODE_ENABLED())
6793                 return;
6794
6795         ha->msix_count += 1; /* For ATIO Q */
6796 }
6797
6798
6799 void
6800 qlt_modify_vp_config(struct scsi_qla_host *vha,
6801         struct vp_config_entry_24xx *vpmod)
6802 {
6803         /* enable target mode.  Bit5 = 1 => disable */
6804         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6805                 vpmod->options_idx1 &= ~BIT_5;
6806
6807         /* Disable ini mode, if requested.  bit4 = 1 => disable */
6808         if (qla_tgt_mode_enabled(vha))
6809                 vpmod->options_idx1 &= ~BIT_4;
6810 }
6811
6812 void
6813 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6814 {
6815         int rc;
6816
6817         if (!QLA_TGT_MODE_ENABLED())
6818                 return;
6819
6820         if  (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6821                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6822                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6823         } else {
6824                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6825                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6826         }
6827
6828         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6829         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6830
6831         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
6832         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
6833             qlt_unknown_atio_work_fn);
6834
6835         qlt_clear_mode(base_vha);
6836
6837         rc = btree_init32(&ha->tgt.host_map);
6838         if (rc)
6839                 ql_log(ql_log_info, base_vha, 0xd03d,
6840                     "Unable to initialize ha->host_map btree\n");
6841
6842         qlt_update_vp_map(base_vha, SET_VP_IDX);
6843 }
6844
6845 irqreturn_t
6846 qla83xx_msix_atio_q(int irq, void *dev_id)
6847 {
6848         struct rsp_que *rsp;
6849         scsi_qla_host_t *vha;
6850         struct qla_hw_data *ha;
6851         unsigned long flags;
6852
6853         rsp = (struct rsp_que *) dev_id;
6854         ha = rsp->hw;
6855         vha = pci_get_drvdata(ha->pdev);
6856
6857         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6858
6859         qlt_24xx_process_atio_queue(vha, 0);
6860
6861         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6862
6863         return IRQ_HANDLED;
6864 }
6865
6866 static void
6867 qlt_handle_abts_recv_work(struct work_struct *work)
6868 {
6869         struct qla_tgt_sess_op *op = container_of(work,
6870                 struct qla_tgt_sess_op, work);
6871         scsi_qla_host_t *vha = op->vha;
6872         struct qla_hw_data *ha = vha->hw;
6873         unsigned long flags;
6874
6875         if (qla2x00_reset_active(vha) ||
6876             (op->chip_reset != ha->base_qpair->chip_reset))
6877                 return;
6878
6879         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6880         qlt_24xx_process_atio_queue(vha, 0);
6881         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6882
6883         spin_lock_irqsave(&ha->hardware_lock, flags);
6884         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
6885         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6886
6887         kfree(op);
6888 }
6889
6890 void
6891 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
6892     response_t *pkt)
6893 {
6894         struct qla_tgt_sess_op *op;
6895
6896         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6897
6898         if (!op) {
6899                 /* do not reach for ATIO queue here.  This is best effort err
6900                  * recovery at this point.
6901                  */
6902                 qlt_response_pkt_all_vps(vha, rsp, pkt);
6903                 return;
6904         }
6905
6906         memcpy(&op->atio, pkt, sizeof(*pkt));
6907         op->vha = vha;
6908         op->chip_reset = vha->hw->base_qpair->chip_reset;
6909         op->rsp = rsp;
6910         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6911         queue_work(qla_tgt_wq, &op->work);
6912         return;
6913 }
6914
6915 int
6916 qlt_mem_alloc(struct qla_hw_data *ha)
6917 {
6918         if (!QLA_TGT_MODE_ENABLED())
6919                 return 0;
6920
6921         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6922             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6923         if (!ha->tgt.tgt_vp_map)
6924                 return -ENOMEM;
6925
6926         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6927             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6928             &ha->tgt.atio_dma, GFP_KERNEL);
6929         if (!ha->tgt.atio_ring) {
6930                 kfree(ha->tgt.tgt_vp_map);
6931                 return -ENOMEM;
6932         }
6933         return 0;
6934 }
6935
6936 void
6937 qlt_mem_free(struct qla_hw_data *ha)
6938 {
6939         if (!QLA_TGT_MODE_ENABLED())
6940                 return;
6941
6942         if (ha->tgt.atio_ring) {
6943                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6944                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6945                     ha->tgt.atio_dma);
6946         }
6947         kfree(ha->tgt.tgt_vp_map);
6948 }
6949
6950 /* vport_slock to be held by the caller */
6951 void
6952 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6953 {
6954         void *slot;
6955         u32 key;
6956         int rc;
6957
6958         if (!QLA_TGT_MODE_ENABLED())
6959                 return;
6960
6961         key = vha->d_id.b24;
6962
6963         switch (cmd) {
6964         case SET_VP_IDX:
6965                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6966                 break;
6967         case SET_AL_PA:
6968                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
6969                 if (!slot) {
6970                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
6971                             "Save vha in host_map %p %06x\n", vha, key);
6972                         rc = btree_insert32(&vha->hw->tgt.host_map,
6973                                 key, vha, GFP_ATOMIC);
6974                         if (rc)
6975                                 ql_log(ql_log_info, vha, 0xd03e,
6976                                     "Unable to insert s_id into host_map: %06x\n",
6977                                     key);
6978                         return;
6979                 }
6980                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
6981                     "replace existing vha in host_map %p %06x\n", vha, key);
6982                 btree_update32(&vha->hw->tgt.host_map, key, vha);
6983                 break;
6984         case RESET_VP_IDX:
6985                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6986                 break;
6987         case RESET_AL_PA:
6988                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
6989                    "clear vha in host_map %p %06x\n", vha, key);
6990                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
6991                 if (slot)
6992                         btree_remove32(&vha->hw->tgt.host_map, key);
6993                 vha->d_id.b24 = 0;
6994                 break;
6995         }
6996 }
6997
6998 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
6999 {
7000         unsigned long flags;
7001         struct qla_hw_data *ha = vha->hw;
7002
7003         if (!vha->d_id.b24) {
7004                 spin_lock_irqsave(&ha->vport_slock, flags);
7005                 vha->d_id = id;
7006                 qlt_update_vp_map(vha, SET_AL_PA);
7007                 spin_unlock_irqrestore(&ha->vport_slock, flags);
7008         } else if (vha->d_id.b24 != id.b24) {
7009                 spin_lock_irqsave(&ha->vport_slock, flags);
7010                 qlt_update_vp_map(vha, RESET_AL_PA);
7011                 vha->d_id = id;
7012                 qlt_update_vp_map(vha, SET_AL_PA);
7013                 spin_unlock_irqrestore(&ha->vport_slock, flags);
7014         }
7015 }
7016
7017 static int __init qlt_parse_ini_mode(void)
7018 {
7019         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7020                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7021         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7022                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7023         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7024                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7025         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7026                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7027         else
7028                 return false;
7029
7030         return true;
7031 }
7032
7033 int __init qlt_init(void)
7034 {
7035         int ret;
7036
7037         if (!qlt_parse_ini_mode()) {
7038                 ql_log(ql_log_fatal, NULL, 0xe06b,
7039                     "qlt_parse_ini_mode() failed\n");
7040                 return -EINVAL;
7041         }
7042
7043         if (!QLA_TGT_MODE_ENABLED())
7044                 return 0;
7045
7046         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7047             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7048             qla_tgt_mgmt_cmd), 0, NULL);
7049         if (!qla_tgt_mgmt_cmd_cachep) {
7050                 ql_log(ql_log_fatal, NULL, 0xd04b,
7051                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7052                 return -ENOMEM;
7053         }
7054
7055         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7056             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7057             0, NULL);
7058
7059         if (!qla_tgt_plogi_cachep) {
7060                 ql_log(ql_log_fatal, NULL, 0xe06d,
7061                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7062                 ret = -ENOMEM;
7063                 goto out_mgmt_cmd_cachep;
7064         }
7065
7066         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7067             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7068         if (!qla_tgt_mgmt_cmd_mempool) {
7069                 ql_log(ql_log_fatal, NULL, 0xe06e,
7070                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7071                 ret = -ENOMEM;
7072                 goto out_plogi_cachep;
7073         }
7074
7075         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7076         if (!qla_tgt_wq) {
7077                 ql_log(ql_log_fatal, NULL, 0xe06f,
7078                     "alloc_workqueue for qla_tgt_wq failed\n");
7079                 ret = -ENOMEM;
7080                 goto out_cmd_mempool;
7081         }
7082         /*
7083          * Return 1 to signal that initiator-mode is being disabled
7084          */
7085         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7086
7087 out_cmd_mempool:
7088         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7089 out_plogi_cachep:
7090         kmem_cache_destroy(qla_tgt_plogi_cachep);
7091 out_mgmt_cmd_cachep:
7092         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7093         return ret;
7094 }
7095
7096 void qlt_exit(void)
7097 {
7098         if (!QLA_TGT_MODE_ENABLED())
7099                 return;
7100
7101         destroy_workqueue(qla_tgt_wq);
7102         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7103         kmem_cache_destroy(qla_tgt_plogi_cachep);
7104         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7105 }