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 = 50;
  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 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  70
  71 static int temp_sam_status = SAM_STAT_BUSY;
  72
  73 /*
  74  * From scsi/fc/fc_fcp.h
  75  */
  76 enum fcp_resp_rsp_codes {
  77         FCP_TMF_CMPL = 0,
  78         FCP_DATA_LEN_INVALID = 1,
  79         FCP_CMND_FIELDS_INVALID = 2,
  80         FCP_DATA_PARAM_MISMATCH = 3,
  81         FCP_TMF_REJECTED = 4,
  82         FCP_TMF_FAILED = 5,
  83         FCP_TMF_INVALID_LUN = 9,
  84 };
  85
  86 /*
  87  * fc_pri_ta from scsi/fc/fc_fcp.h
  88  */
  89 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  90 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  91 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  92 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  93 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  94 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  95 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  96
  97 /*
  98  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  99  * must be called under HW lock and could unlock/lock it inside.
 100  * It isn't an issue, since in the current implementation on the time when
 101  * those functions are called:
 102  *
 103  *   - Either context is IRQ and only IRQ handler can modify HW data,
 104  *     including rings related fields,
 105  *
 106  *   - Or access to target mode variables from struct qla_tgt doesn't
 107  *     cross those functions boundaries, except tgt_stop, which
 108  *     additionally protected by irq_cmd_count.
 109  */
 110 /* Predefs for callbacks handed to qla2xxx LLD */
 111 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 112         struct atio_from_isp *pkt, uint8_t);
 113 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
 114 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 115         int fn, void *iocb, int flags);
 116 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 117         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 118 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
 119         struct qla_tgt_cmd *cmd);
 120 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 121         struct atio_from_isp *atio, uint16_t status, int qfull);
 122 static void qlt_disable_vha(struct scsi_qla_host *vha);
 123 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 124 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 125         struct imm_ntfy_from_isp *ntfy,
 126         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 127         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 128 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 129         struct imm_ntfy_from_isp *imm, int ha_locked);
 130 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 131         fc_port_t *fcport, bool local);
 132 void qlt_unreg_sess(struct fc_port *sess);
 133 /*
 134  * Global Variables
 135  */
 136 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 137 static struct kmem_cache *qla_tgt_plogi_cachep;
 138 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 139 static struct workqueue_struct *qla_tgt_wq;
 140 static DEFINE_MUTEX(qla_tgt_mutex);
 141 static LIST_HEAD(qla_tgt_glist);
 142
 143 /* This API intentionally takes dest as a parameter, rather than returning
 144  * int value to avoid caller forgetting to issue wmb() after the store */
 145 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 146 {
 147         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 148         *dest = atomic_inc_return(&base_vha->generation_tick);
 149         /* memory barrier */
 150         wmb();
 151 }
 152
 153 /* Might release hw lock, then reaquire!! */
 154 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 155 {
 156         /* Send marker if required */
 157         if (unlikely(vha->marker_needed != 0)) {
 158                 int rc = qla2x00_issue_marker(vha, vha_locked);
 159                 if (rc != QLA_SUCCESS) {
 160                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 161                             "qla_target(%d): issue_marker() failed\n",
 162                             vha->vp_idx);
 163                 }
 164                 return rc;
 165         }
 166         return QLA_SUCCESS;
 167 }
 168
 169 static inline
 170 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 171         uint8_t *d_id)
 172 {
 173         struct qla_hw_data *ha = vha->hw;
 174         uint8_t vp_idx;
 175
 176         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 177                 return NULL;
 178
 179         if (vha->d_id.b.al_pa == d_id[2])
 180                 return vha;
 181
 182         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 183         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 184         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 185                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 186
 187         return NULL;
 188 }
 189
 190 static inline
 191 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 192         uint16_t vp_idx)
 193 {
 194         struct qla_hw_data *ha = vha->hw;
 195
 196         if (vha->vp_idx == vp_idx)
 197                 return vha;
 198
 199         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 200         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 201                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 202
 203         return NULL;
 204 }
 205
 206 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 207 {
 208         unsigned long flags;
 209
 210         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 211
 212         vha->hw->tgt.num_pend_cmds++;
 213         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 214                 vha->qla_stats.stat_max_pend_cmds =
 215                         vha->hw->tgt.num_pend_cmds;
 216         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 217 }
 218 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 219 {
 220         unsigned long flags;
 221
 222         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 223         vha->hw->tgt.num_pend_cmds--;
 224         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 225 }
 226
 227
 228 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 229         struct atio_from_isp *atio,     uint8_t ha_locked)
 230 {
 231         struct qla_tgt_sess_op *u;
 232         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 233         unsigned long flags;
 234
 235         if (tgt->tgt_stop) {
 236                 ql_dbg(ql_dbg_async, vha, 0xffff,
 237                            "qla_target(%d): dropping unknown ATIO_TYPE7, "
 238                            "because tgt is being stopped", vha->vp_idx);
 239                 goto out_term;
 240         }
 241
 242         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 243         if (u == NULL) {
 244                 ql_dbg(ql_dbg_async, vha, 0xffff,
 245                     "Alloc of struct unknown_atio (size %zd) failed", sizeof(*u));
 246                 /* It should be harmless and on the next retry should work well */
 247                 goto out_term;
 248         }
 249
 250         u->vha = vha;
 251         memcpy(&u->atio, atio, sizeof(*atio));
 252         INIT_LIST_HEAD(&u->cmd_list);
 253
 254         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 255         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 256         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 257
 258         schedule_delayed_work(&vha->unknown_atio_work, 1);
 259
 260 out:
 261         return;
 262
 263 out_term:
 264         qlt_send_term_exchange(vha, NULL, atio, ha_locked, 0);
 265         goto out;
 266 }
 267
 268 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 269         uint8_t ha_locked)
 270 {
 271         struct qla_tgt_sess_op *u, *t;
 272         scsi_qla_host_t *host;
 273         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 274         unsigned long flags;
 275         uint8_t queued = 0;
 276
 277         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 278                 if (u->aborted) {
 279                         ql_dbg(ql_dbg_async, vha, 0xffff,
 280                             "Freeing unknown %s %p, because of Abort",
 281                             "ATIO_TYPE7", u);
 282                         qlt_send_term_exchange(vha, NULL, &u->atio,
 283                             ha_locked, 0);
 284                         goto abort;
 285                 }
 286
 287                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 288                 if (host != NULL) {
 289                         ql_dbg(ql_dbg_async, vha, 0xffff,
 290                                 "Requeuing unknown ATIO_TYPE7 %p", u);
 291                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 292                 } else if (tgt->tgt_stop) {
 293                         ql_dbg(ql_dbg_async, vha, 0xffff,
 294                                 "Freeing unknown %s %p, because tgt is being stopped",
 295                                 "ATIO_TYPE7", u);
 296                         qlt_send_term_exchange(vha, NULL, &u->atio,
 297                             ha_locked, 0);
 298                 } else {
 299                         ql_dbg(ql_dbg_async, vha, 0xffff,
 300                                 "u %p, vha %p, host %p, sched again..", u,
 301                                 vha, host);
 302                         if (!queued) {
 303                                 queued = 1;
 304                                 schedule_delayed_work(&vha->unknown_atio_work,
 305                                     1);
 306                         }
 307                         continue;
 308                 }
 309
 310 abort:
 311                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 312                 list_del(&u->cmd_list);
 313                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 314                 kfree(u);
 315         }
 316 }
 317
 318 void qlt_unknown_atio_work_fn(struct work_struct *work)
 319 {
 320         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 321             struct scsi_qla_host, unknown_atio_work);
 322
 323         qlt_try_to_dequeue_unknown_atios(vha, 0);
 324 }
 325
 326 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 327         struct atio_from_isp *atio, uint8_t ha_locked)
 328 {
 329         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 330                 "%s: qla_target(%d): type %x ox_id %04x\n",
 331                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 332                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 333
 334         switch (atio->u.raw.entry_type) {
 335         case ATIO_TYPE7:
 336         {
 337                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 338                     atio->u.isp24.fcp_hdr.d_id);
 339                 if (unlikely(NULL == host)) {
 340                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 341                             "qla_target(%d): Received ATIO_TYPE7 "
 342                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 343                             atio->u.isp24.fcp_hdr.d_id[0],
 344                             atio->u.isp24.fcp_hdr.d_id[1],
 345                             atio->u.isp24.fcp_hdr.d_id[2]);
 346
 347
 348                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 349                         break;
 350                 }
 351                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 352                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 353
 354                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 355                 break;
 356         }
 357
 358         case IMMED_NOTIFY_TYPE:
 359         {
 360                 struct scsi_qla_host *host = vha;
 361                 struct imm_ntfy_from_isp *entry =
 362                     (struct imm_ntfy_from_isp *)atio;
 363
 364                 if ((entry->u.isp24.vp_index != 0xFF) &&
 365                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 366                         host = qlt_find_host_by_vp_idx(vha,
 367                             entry->u.isp24.vp_index);
 368                         if (unlikely(!host)) {
 369                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 370                                     "qla_target(%d): Received "
 371                                     "ATIO (IMMED_NOTIFY_TYPE) "
 372                                     "with unknown vp_index %d\n",
 373                                     vha->vp_idx, entry->u.isp24.vp_index);
 374                                 break;
 375                         }
 376                 }
 377                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 378                 break;
 379         }
 380
 381         case VP_RPT_ID_IOCB_TYPE:
 382                 qla24xx_report_id_acquisition(vha,
 383                         (struct vp_rpt_id_entry_24xx *)atio);
 384                 break;
 385
 386         case ABTS_RECV_24XX:
 387         {
 388                 struct abts_recv_from_24xx *entry =
 389                         (struct abts_recv_from_24xx *)atio;
 390                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 391                         entry->vp_index);
 392                 if (unlikely(!host)) {
 393                         ql_dbg(ql_dbg_tgt, vha, 0xffff,
 394                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 395                             "received, with unknown vp_index %d\n",
 396                             vha->vp_idx, entry->vp_index);
 397                         break;
 398                 }
 399                 qlt_response_pkt(host, (response_t *)atio);
 400                 break;
 401
 402         }
 403
 404         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 405
 406         default:
 407                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 408                     "qla_target(%d): Received unknown ATIO atio "
 409                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 410                 break;
 411         }
 412
 413         return false;
 414 }
 415
 416 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 417 {
 418         switch (pkt->entry_type) {
 419         case CTIO_CRC2:
 420                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 421                         "qla_target(%d):%s: CRC2 Response pkt\n",
 422                         vha->vp_idx, __func__);
 423         case CTIO_TYPE7:
 424         {
 425                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 426                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 427                     entry->vp_index);
 428                 if (unlikely(!host)) {
 429                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 430                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 431                             "received, with unknown vp_index %d\n",
 432                             vha->vp_idx, entry->vp_index);
 433                         break;
 434                 }
 435                 qlt_response_pkt(host, pkt);
 436                 break;
 437         }
 438
 439         case IMMED_NOTIFY_TYPE:
 440         {
 441                 struct scsi_qla_host *host = vha;
 442                 struct imm_ntfy_from_isp *entry =
 443                     (struct imm_ntfy_from_isp *)pkt;
 444
 445                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 446                 if (unlikely(!host)) {
 447                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 448                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 449                             "received, with unknown vp_index %d\n",
 450                             vha->vp_idx, entry->u.isp24.vp_index);
 451                         break;
 452                 }
 453                 qlt_response_pkt(host, pkt);
 454                 break;
 455         }
 456
 457         case NOTIFY_ACK_TYPE:
 458         {
 459                 struct scsi_qla_host *host = vha;
 460                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 461
 462                 if (0xFF != entry->u.isp24.vp_index) {
 463                         host = qlt_find_host_by_vp_idx(vha,
 464                             entry->u.isp24.vp_index);
 465                         if (unlikely(!host)) {
 466                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 467                                     "qla_target(%d): Response "
 468                                     "pkt (NOTIFY_ACK_TYPE) "
 469                                     "received, with unknown "
 470                                     "vp_index %d\n", vha->vp_idx,
 471                                     entry->u.isp24.vp_index);
 472                                 break;
 473                         }
 474                 }
 475                 qlt_response_pkt(host, pkt);
 476                 break;
 477         }
 478
 479         case ABTS_RECV_24XX:
 480         {
 481                 struct abts_recv_from_24xx *entry =
 482                     (struct abts_recv_from_24xx *)pkt;
 483                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 484                     entry->vp_index);
 485                 if (unlikely(!host)) {
 486                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 487                             "qla_target(%d): Response pkt "
 488                             "(ABTS_RECV_24XX) received, with unknown "
 489                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 490                         break;
 491                 }
 492                 qlt_response_pkt(host, pkt);
 493                 break;
 494         }
 495
 496         case ABTS_RESP_24XX:
 497         {
 498                 struct abts_resp_to_24xx *entry =
 499                     (struct abts_resp_to_24xx *)pkt;
 500                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 501                     entry->vp_index);
 502                 if (unlikely(!host)) {
 503                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 504                             "qla_target(%d): Response pkt "
 505                             "(ABTS_RECV_24XX) received, with unknown "
 506                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 507                         break;
 508                 }
 509                 qlt_response_pkt(host, pkt);
 510                 break;
 511         }
 512
 513         default:
 514                 qlt_response_pkt(vha, pkt);
 515                 break;
 516         }
 517
 518 }
 519
 520 /*
 521  * All qlt_plogi_ack_t operations are protected by hardware_lock
 522  */
 523 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 524         struct imm_ntfy_from_isp *ntfy, int type)
 525 {
 526         struct qla_work_evt *e;
 527         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 528         if (!e)
 529                 return QLA_FUNCTION_FAILED;
 530
 531         e->u.nack.fcport = fcport;
 532         e->u.nack.type = type;
 533         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 534         return qla2x00_post_work(vha, e);
 535 }
 536
 537 static
 538 void qla2x00_async_nack_sp_done(void *s, int res)
 539 {
 540         struct srb *sp = (struct srb *)s;
 541         struct scsi_qla_host *vha = sp->vha;
 542         unsigned long flags;
 543
 544         ql_dbg(ql_dbg_disc, vha, 0xffff,
 545                 "Async done-%s res %x %8phC  type %d\n",
 546                 sp->name, res, sp->fcport->port_name, sp->type);
 547
 548         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 549         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 550         sp->fcport->chip_reset = vha->hw->chip_reset;
 551
 552         switch (sp->type) {
 553         case SRB_NACK_PLOGI:
 554                 sp->fcport->login_gen++;
 555                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 556                 sp->fcport->logout_on_delete = 1;
 557                 break;
 558
 559         case SRB_NACK_PRLI:
 560                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 561                 sp->fcport->deleted = 0;
 562
 563                 if (!sp->fcport->login_succ &&
 564                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 565                         sp->fcport->login_succ = 1;
 566
 567                         vha->fcport_count++;
 568
 569                         if (!IS_IIDMA_CAPABLE(vha->hw) ||
 570                             !vha->hw->flags.gpsc_supported) {
 571                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
 572                                         "%s %d %8phC post upd_fcport fcp_cnt %d\n",
 573                                         __func__, __LINE__,
 574                                         sp->fcport->port_name,
 575                                         vha->fcport_count);
 576
 577                                 qla24xx_post_upd_fcport_work(vha, sp->fcport);
 578                         } else {
 579                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
 580                                         "%s %d %8phC post gpsc fcp_cnt %d\n",
 581                                         __func__, __LINE__,
 582                                         sp->fcport->port_name,
 583                                         vha->fcport_count);
 584
 585                                 qla24xx_post_gpsc_work(vha, sp->fcport);
 586                         }
 587                 }
 588                 break;
 589
 590         case SRB_NACK_LOGO:
 591                 sp->fcport->login_gen++;
 592                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 593                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 594                 break;
 595         }
 596         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 597
 598         sp->free(sp);
 599 }
 600
 601 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 602         struct imm_ntfy_from_isp *ntfy, int type)
 603 {
 604         int rval = QLA_FUNCTION_FAILED;
 605         srb_t *sp;
 606         char *c = NULL;
 607
 608         fcport->flags |= FCF_ASYNC_SENT;
 609         switch (type) {
 610         case SRB_NACK_PLOGI:
 611                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 612                 c = "PLOGI";
 613                 break;
 614         case SRB_NACK_PRLI:
 615                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 616                 c = "PRLI";
 617                 break;
 618         case SRB_NACK_LOGO:
 619                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 620                 c = "LOGO";
 621                 break;
 622         }
 623
 624         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 625         if (!sp)
 626                 goto done;
 627
 628         sp->type = type;
 629         sp->name = "nack";
 630
 631         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 632
 633         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 634
 635         sp->done = qla2x00_async_nack_sp_done;
 636
 637         rval = qla2x00_start_sp(sp);
 638         if (rval != QLA_SUCCESS)
 639                 goto done_free_sp;
 640
 641         ql_dbg(ql_dbg_disc, vha, 0xffff,
 642                 "Async-%s %8phC hndl %x %s\n",
 643                 sp->name, fcport->port_name, sp->handle, c);
 644
 645         return rval;
 646
 647 done_free_sp:
 648         sp->free(sp);
 649 done:
 650         fcport->flags &= ~FCF_ASYNC_SENT;
 651         return rval;
 652 }
 653
 654 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 655 {
 656         fc_port_t *t;
 657         unsigned long flags;
 658
 659         switch (e->u.nack.type) {
 660         case SRB_NACK_PRLI:
 661                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 662                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 663                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 664                 if (t) {
 665                         ql_log(ql_log_info, vha, 0xffff,
 666                             "%s create sess success %p", __func__, t);
 667                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 668                         /* create sess has an extra kref */
 669                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 670                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 671                 }
 672                 break;
 673         }
 674         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 675             (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
 676 }
 677
 678 void qla24xx_delete_sess_fn(struct work_struct *work)
 679 {
 680         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 681         struct qla_hw_data *ha = fcport->vha->hw;
 682         unsigned long flags;
 683
 684         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 685
 686         if (fcport->se_sess) {
 687                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 688                 ha->tgt.tgt_ops->put_sess(fcport);
 689         } else {
 690                 qlt_unreg_sess(fcport);
 691         }
 692         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 693 }
 694
 695 /*
 696  * Called from qla2x00_reg_remote_port()
 697  */
 698 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 699 {
 700         struct qla_hw_data *ha = vha->hw;
 701         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 702         struct fc_port *sess = fcport;
 703         unsigned long flags;
 704
 705         if (!vha->hw->tgt.tgt_ops)
 706                 return;
 707
 708         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 709         if (tgt->tgt_stop) {
 710                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 711                 return;
 712         }
 713
 714         if (fcport->disc_state == DSC_DELETE_PEND) {
 715                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 716                 return;
 717         }
 718
 719         if (!sess->se_sess) {
 720                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 721
 722                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 723                 sess = qlt_create_sess(vha, fcport, false);
 724                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 725
 726                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 727         } else {
 728                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 729                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 730                         return;
 731                 }
 732
 733                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 734                         ql_dbg(ql_dbg_disc, vha, 0xffff,
 735                             "%s: kref_get fail sess %8phC \n",
 736                             __func__, sess->port_name);
 737                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 738                         return;
 739                 }
 740
 741                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 742                     "qla_target(%u): %ssession for port %8phC "
 743                     "(loop ID %d) reappeared\n", vha->vp_idx,
 744                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 745
 746                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 747                     "Reappeared sess %p\n", sess);
 748
 749                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 750                     fcport->loop_id,
 751                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 752         }
 753
 754         if (sess && sess->local) {
 755                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 756                     "qla_target(%u): local session for "
 757                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 758                     fcport->port_name, sess->loop_id);
 759                 sess->local = 0;
 760         }
 761         ha->tgt.tgt_ops->put_sess(sess);
 762         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 763 }
 764
 765 /*
 766  * This is a zero-base ref-counting solution, since hardware_lock
 767  * guarantees that ref_count is not modified concurrently.
 768  * Upon successful return content of iocb is undefined
 769  */
 770 static struct qlt_plogi_ack_t *
 771 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 772                        struct imm_ntfy_from_isp *iocb)
 773 {
 774         struct qlt_plogi_ack_t *pla;
 775
 776         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 777                 if (pla->id.b24 == id->b24) {
 778                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 779                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 780                         return pla;
 781                 }
 782         }
 783
 784         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 785         if (!pla) {
 786                 ql_dbg(ql_dbg_async, vha, 0x5088,
 787                        "qla_target(%d): Allocation of plogi_ack failed\n",
 788                        vha->vp_idx);
 789                 return NULL;
 790         }
 791
 792         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 793         pla->id = *id;
 794         list_add_tail(&pla->list, &vha->plogi_ack_list);
 795
 796         return pla;
 797 }
 798
 799 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 800     struct qlt_plogi_ack_t *pla)
 801 {
 802         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 803         port_id_t port_id;
 804         uint16_t loop_id;
 805         fc_port_t *fcport = pla->fcport;
 806
 807         BUG_ON(!pla->ref_count);
 808         pla->ref_count--;
 809
 810         if (pla->ref_count)
 811                 return;
 812
 813         ql_dbg(ql_dbg_disc, vha, 0x5089,
 814             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 815             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 816             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 817             iocb->u.isp24.port_id[0],
 818             le16_to_cpu(iocb->u.isp24.nport_handle),
 819             iocb->u.isp24.exchange_address, iocb->ox_id);
 820
 821         port_id.b.domain = iocb->u.isp24.port_id[2];
 822         port_id.b.area   = iocb->u.isp24.port_id[1];
 823         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 824         port_id.b.rsvd_1 = 0;
 825
 826         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 827
 828         fcport->loop_id = loop_id;
 829         fcport->d_id = port_id;
 830         qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 831
 832         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 833                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 834                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 835                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 836                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 837         }
 838
 839         list_del(&pla->list);
 840         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 841 }
 842
 843 void
 844 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 845     struct fc_port *sess, enum qlt_plogi_link_t link)
 846 {
 847         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 848         /* Inc ref_count first because link might already be pointing at pla */
 849         pla->ref_count++;
 850
 851         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 852                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 853                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 854                 sess, link, sess->port_name,
 855                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 856                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 857                 pla->ref_count, pla, link);
 858
 859         if (sess->plogi_link[link])
 860                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 861
 862         if (link == QLT_PLOGI_LINK_SAME_WWN)
 863                 pla->fcport = sess;
 864
 865         sess->plogi_link[link] = pla;
 866 }
 867
 868 typedef struct {
 869         /* These fields must be initialized by the caller */
 870         port_id_t id;
 871         /*
 872          * number of cmds dropped while we were waiting for
 873          * initiator to ack LOGO initialize to 1 if LOGO is
 874          * triggered by a command, otherwise, to 0
 875          */
 876         int cmd_count;
 877
 878         /* These fields are used by callee */
 879         struct list_head list;
 880 } qlt_port_logo_t;
 881
 882 static void
 883 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 884 {
 885         qlt_port_logo_t *tmp;
 886         int res;
 887
 888         mutex_lock(&vha->vha_tgt.tgt_mutex);
 889
 890         list_for_each_entry(tmp, &vha->logo_list, list) {
 891                 if (tmp->id.b24 == logo->id.b24) {
 892                         tmp->cmd_count += logo->cmd_count;
 893                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 894                         return;
 895                 }
 896         }
 897
 898         list_add_tail(&logo->list, &vha->logo_list);
 899
 900         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 901
 902         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 903
 904         mutex_lock(&vha->vha_tgt.tgt_mutex);
 905         list_del(&logo->list);
 906         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 907
 908         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 909             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 910             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 911             logo->cmd_count, res);
 912 }
 913
 914 static void qlt_free_session_done(struct work_struct *work)
 915 {
 916         struct fc_port *sess = container_of(work, struct fc_port,
 917             free_work);
 918         struct qla_tgt *tgt = sess->tgt;
 919         struct scsi_qla_host *vha = sess->vha;
 920         struct qla_hw_data *ha = vha->hw;
 921         unsigned long flags;
 922         bool logout_started = false;
 923         struct event_arg ea;
 924         scsi_qla_host_t *base_vha;
 925
 926         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 927                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 928                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 929                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 930                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 931                 sess->logout_on_delete, sess->keep_nport_handle,
 932                 sess->send_els_logo);
 933
 934
 935         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 936                 if (sess->send_els_logo) {
 937                         qlt_port_logo_t logo;
 938
 939                         logo.id = sess->d_id;
 940                         logo.cmd_count = 0;
 941                         qlt_send_first_logo(vha, &logo);
 942                 }
 943
 944                 if (sess->logout_on_delete) {
 945                         int rc;
 946
 947                         rc = qla2x00_post_async_logout_work(vha, sess, NULL);
 948                         if (rc != QLA_SUCCESS)
 949                                 ql_log(ql_log_warn, vha, 0xf085,
 950                                     "Schedule logo failed sess %p rc %d\n",
 951                                     sess, rc);
 952                         else
 953                                 logout_started = true;
 954                 }
 955         }
 956
 957         /*
 958          * Release the target session for FC Nexus from fabric module code.
 959          */
 960         if (sess->se_sess != NULL)
 961                 ha->tgt.tgt_ops->free_session(sess);
 962
 963         if (logout_started) {
 964                 bool traced = false;
 965
 966                 while (!ACCESS_ONCE(sess->logout_completed)) {
 967                         if (!traced) {
 968                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
 969                                         "%s: waiting for sess %p logout\n",
 970                                         __func__, sess);
 971                                 traced = true;
 972                         }
 973                         msleep(100);
 974                 }
 975
 976                 ql_dbg(ql_dbg_disc, vha, 0xf087,
 977                     "%s: sess %p logout completed\n",__func__, sess);
 978         }
 979
 980         if (sess->logo_ack_needed) {
 981                 sess->logo_ack_needed = 0;
 982                 qla24xx_async_notify_ack(vha, sess,
 983                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
 984         }
 985
 986         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 987         if (sess->se_sess) {
 988                 sess->se_sess = NULL;
 989                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
 990                         tgt->sess_count--;
 991         }
 992
 993         sess->disc_state = DSC_DELETED;
 994         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
 995         sess->deleted = QLA_SESS_DELETED;
 996         sess->login_retry = vha->hw->login_retry_count;
 997
 998         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
 999                 vha->fcport_count--;
1000                 sess->login_succ = 0;
1001         }
1002
1003         if (sess->chip_reset != sess->vha->hw->chip_reset)
1004                 qla2x00_clear_loop_id(sess);
1005
1006         if (sess->conflict) {
1007                 sess->conflict->login_pause = 0;
1008                 sess->conflict = NULL;
1009                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1010                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1011         }
1012
1013         {
1014                 struct qlt_plogi_ack_t *own =
1015                     sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1016                 struct qlt_plogi_ack_t *con =
1017                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1018                 struct imm_ntfy_from_isp *iocb;
1019
1020                 if (con) {
1021                         iocb = &con->iocb;
1022                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1023                                  "se_sess %p / sess %p port %8phC is gone,"
1024                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1025                                  sess->se_sess, sess, sess->port_name,
1026                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1027                                  own ? own->ref_count : -1,
1028                                  iocb->u.isp24.port_name, con->ref_count);
1029                         qlt_plogi_ack_unref(vha, con);
1030                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1031                 } else {
1032                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1033                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1034                             sess->se_sess, sess, sess->port_name,
1035                             own ? "releasing own PLOGI" :
1036                             "no own PLOGI pending",
1037                             own ? own->ref_count : -1);
1038                 }
1039
1040                 if (own) {
1041                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1042                         qlt_plogi_ack_unref(vha, own);
1043                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1044                 }
1045         }
1046         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1047
1048         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1049             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1050                 sess, sess->port_name, vha->fcport_count);
1051
1052         if (tgt && (tgt->sess_count == 0))
1053                 wake_up_all(&tgt->waitQ);
1054
1055         if (vha->fcport_count == 0)
1056                 wake_up_all(&vha->fcport_waitQ);
1057
1058         base_vha = pci_get_drvdata(ha->pdev);
1059         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1060                 return;
1061
1062         if (!tgt || !tgt->tgt_stop) {
1063                 memset(&ea, 0, sizeof(ea));
1064                 ea.event = FCME_DELETE_DONE;
1065                 ea.fcport = sess;
1066                 qla2x00_fcport_event_handler(vha, &ea);
1067         }
1068 }
1069
1070 /* ha->tgt.sess_lock supposed to be held on entry */
1071 void qlt_unreg_sess(struct fc_port *sess)
1072 {
1073         struct scsi_qla_host *vha = sess->vha;
1074
1075         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1076             "%s sess %p for deletion %8phC\n",
1077             __func__, sess, sess->port_name);
1078
1079         if (sess->se_sess)
1080                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1081
1082         qla2x00_mark_device_lost(vha, sess, 1, 1);
1083
1084         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1085         sess->disc_state = DSC_DELETE_PEND;
1086         sess->last_rscn_gen = sess->rscn_gen;
1087         sess->last_login_gen = sess->login_gen;
1088
1089         INIT_WORK(&sess->free_work, qlt_free_session_done);
1090         schedule_work(&sess->free_work);
1091 }
1092 EXPORT_SYMBOL(qlt_unreg_sess);
1093
1094 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1095 {
1096         struct qla_hw_data *ha = vha->hw;
1097         struct fc_port *sess = NULL;
1098         uint16_t loop_id;
1099         int res = 0;
1100         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1101         unsigned long flags;
1102
1103         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1104         if (loop_id == 0xFFFF) {
1105                 /* Global event */
1106                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1107                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1108                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1109                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1110         } else {
1111                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1112                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1113                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1114         }
1115
1116         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1117             "Using sess for qla_tgt_reset: %p\n", sess);
1118         if (!sess) {
1119                 res = -ESRCH;
1120                 return res;
1121         }
1122
1123         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1124             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1125             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1126             mcmd, loop_id);
1127
1128         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1129 }
1130
1131 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1132 {
1133         if (sess->chip_reset != sess->vha->hw->chip_reset) {
1134                 sess->logout_on_delete = 0;
1135                 sess->logo_ack_needed = 0;
1136                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1137                 sess->scan_state = 0;
1138         }
1139 }
1140
1141 /* ha->tgt.sess_lock supposed to be held on entry */
1142 void qlt_schedule_sess_for_deletion(struct fc_port *sess,
1143         bool immediate)
1144 {
1145         struct qla_tgt *tgt = sess->tgt;
1146
1147         if (sess->disc_state == DSC_DELETE_PEND)
1148                 return;
1149
1150         if (sess->disc_state == DSC_DELETED) {
1151                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1152                         wake_up_all(&tgt->waitQ);
1153                 if (sess->vha->fcport_count == 0)
1154                         wake_up_all(&sess->vha->fcport_waitQ);
1155
1156                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1157                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1158                         return;
1159         }
1160
1161         sess->disc_state = DSC_DELETE_PEND;
1162
1163         if (sess->deleted == QLA_SESS_DELETED)
1164                 sess->logout_on_delete = 0;
1165
1166         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1167         qla24xx_chk_fcp_state(sess);
1168
1169         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1170             "Scheduling sess %p for deletion\n", sess);
1171
1172         schedule_work(&sess->del_work);
1173 }
1174
1175 void qlt_schedule_sess_for_deletion_lock(struct fc_port *sess)
1176 {
1177         unsigned long flags;
1178         struct qla_hw_data *ha = sess->vha->hw;
1179         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1180         qlt_schedule_sess_for_deletion(sess, 1);
1181         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1182 }
1183
1184 /* ha->tgt.sess_lock supposed to be held on entry */
1185 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1186 {
1187         struct fc_port *sess;
1188         scsi_qla_host_t *vha = tgt->vha;
1189
1190         list_for_each_entry(sess, &vha->vp_fcports, list) {
1191                 if (sess->se_sess)
1192                         qlt_schedule_sess_for_deletion(sess, 1);
1193         }
1194
1195         /* At this point tgt could be already dead */
1196 }
1197
1198 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1199         uint16_t *loop_id)
1200 {
1201         struct qla_hw_data *ha = vha->hw;
1202         dma_addr_t gid_list_dma;
1203         struct gid_list_info *gid_list;
1204         char *id_iter;
1205         int res, rc, i;
1206         uint16_t entries;
1207
1208         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1209             &gid_list_dma, GFP_KERNEL);
1210         if (!gid_list) {
1211                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1212                     "qla_target(%d): DMA Alloc failed of %u\n",
1213                     vha->vp_idx, qla2x00_gid_list_size(ha));
1214                 return -ENOMEM;
1215         }
1216
1217         /* Get list of logged in devices */
1218         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
1219         if (rc != QLA_SUCCESS) {
1220                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1221                     "qla_target(%d): get_id_list() failed: %x\n",
1222                     vha->vp_idx, rc);
1223                 res = -EBUSY;
1224                 goto out_free_id_list;
1225         }
1226
1227         id_iter = (char *)gid_list;
1228         res = -ENOENT;
1229         for (i = 0; i < entries; i++) {
1230                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1231                 if ((gid->al_pa == s_id[2]) &&
1232                     (gid->area == s_id[1]) &&
1233                     (gid->domain == s_id[0])) {
1234                         *loop_id = le16_to_cpu(gid->loop_id);
1235                         res = 0;
1236                         break;
1237                 }
1238                 id_iter += ha->gid_list_info_size;
1239         }
1240
1241 out_free_id_list:
1242         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1243             gid_list, gid_list_dma);
1244         return res;
1245 }
1246
1247 /*
1248  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1249  * Caller must put it.
1250  */
1251 static struct fc_port *qlt_create_sess(
1252         struct scsi_qla_host *vha,
1253         fc_port_t *fcport,
1254         bool local)
1255 {
1256         struct qla_hw_data *ha = vha->hw;
1257         struct fc_port *sess = fcport;
1258         unsigned long flags;
1259
1260         if (vha->vha_tgt.qla_tgt->tgt_stop)
1261                 return NULL;
1262
1263         if (fcport->se_sess) {
1264                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1265                         ql_dbg(ql_dbg_disc, vha, 0xffff,
1266                             "%s: kref_get_unless_zero failed for %8phC\n",
1267                             __func__, sess->port_name);
1268                         return NULL;
1269                 }
1270                 return fcport;
1271         }
1272         sess->tgt = vha->vha_tgt.qla_tgt;
1273         sess->local = local;
1274
1275         /*
1276          * Under normal circumstances we want to logout from firmware when
1277          * session eventually ends and release corresponding nport handle.
1278          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1279          * code will adjust these flags as necessary.
1280          */
1281         sess->logout_on_delete = 1;
1282         sess->keep_nport_handle = 0;
1283         sess->logout_completed = 0;
1284
1285         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1286             &fcport->port_name[0], sess) < 0) {
1287                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
1288                     "(%d) %8phC check_initiator_node_acl failed\n",
1289                     vha->vp_idx, fcport->port_name);
1290                 return NULL;
1291         } else {
1292                 kref_init(&fcport->sess_kref);
1293                 /*
1294                  * Take an extra reference to ->sess_kref here to handle
1295                  * fc_port access across ->tgt.sess_lock reaquire.
1296                  */
1297                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1298                         ql_dbg(ql_dbg_disc, vha, 0xffff,
1299                             "%s: kref_get_unless_zero failed for %8phC\n",
1300                             __func__, sess->port_name);
1301                         return NULL;
1302                 }
1303
1304                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1305                 if (!IS_SW_RESV_ADDR(sess->d_id))
1306                         vha->vha_tgt.qla_tgt->sess_count++;
1307
1308                 qlt_do_generation_tick(vha, &sess->generation);
1309                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1310         }
1311
1312         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1313             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1314             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1315             vha->vha_tgt.qla_tgt->sess_count);
1316
1317         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1318             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1319             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1320             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1321             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1322             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1323
1324         return sess;
1325 }
1326
1327 /*
1328  * max_gen - specifies maximum session generation
1329  * at which this deletion requestion is still valid
1330  */
1331 void
1332 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1333 {
1334         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1335         struct fc_port *sess = fcport;
1336         unsigned long flags;
1337
1338         if (!vha->hw->tgt.tgt_ops)
1339                 return;
1340
1341         if (!tgt)
1342                 return;
1343
1344         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1345         if (tgt->tgt_stop) {
1346                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1347                 return;
1348         }
1349         if (!sess->se_sess) {
1350                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1351                 return;
1352         }
1353
1354         if (max_gen - sess->generation < 0) {
1355                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1356                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1357                     "Ignoring stale deletion request for se_sess %p / sess %p"
1358                     " for port %8phC, req_gen %d, sess_gen %d\n",
1359                     sess->se_sess, sess, sess->port_name, max_gen,
1360                     sess->generation);
1361                 return;
1362         }
1363
1364         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1365
1366         sess->local = 1;
1367         qlt_schedule_sess_for_deletion(sess, false);
1368         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1369 }
1370
1371 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1372 {
1373         struct qla_hw_data *ha = tgt->ha;
1374         unsigned long flags;
1375         int res;
1376         /*
1377          * We need to protect against race, when tgt is freed before or
1378          * inside wake_up()
1379          */
1380         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1381         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1382             "tgt %p, sess_count=%d\n",
1383             tgt, tgt->sess_count);
1384         res = (tgt->sess_count == 0);
1385         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1386
1387         return res;
1388 }
1389
1390 /* Called by tcm_qla2xxx configfs code */
1391 int qlt_stop_phase1(struct qla_tgt *tgt)
1392 {
1393         struct scsi_qla_host *vha = tgt->vha;
1394         struct qla_hw_data *ha = tgt->ha;
1395         unsigned long flags;
1396
1397         mutex_lock(&qla_tgt_mutex);
1398         if (!vha->fc_vport) {
1399                 struct Scsi_Host *sh = vha->host;
1400                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1401                 bool npiv_vports;
1402
1403                 spin_lock_irqsave(sh->host_lock, flags);
1404                 npiv_vports = (fc_host->npiv_vports_inuse);
1405                 spin_unlock_irqrestore(sh->host_lock, flags);
1406
1407                 if (npiv_vports) {
1408                         mutex_unlock(&qla_tgt_mutex);
1409                         return -EPERM;
1410                 }
1411         }
1412         if (tgt->tgt_stop || tgt->tgt_stopped) {
1413                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1414                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1415                 mutex_unlock(&qla_tgt_mutex);
1416                 return -EPERM;
1417         }
1418
1419         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1420             vha->host_no, vha);
1421         /*
1422          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1423          * Lock is needed, because we still can get an incoming packet.
1424          */
1425         mutex_lock(&vha->vha_tgt.tgt_mutex);
1426         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1427         tgt->tgt_stop = 1;
1428         qlt_clear_tgt_db(tgt);
1429         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1430         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1431         mutex_unlock(&qla_tgt_mutex);
1432
1433         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1434             "Waiting for sess works (tgt %p)", tgt);
1435         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1436         while (!list_empty(&tgt->sess_works_list)) {
1437                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1438                 flush_scheduled_work();
1439                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1440         }
1441         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1442
1443         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1444             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1445
1446         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1447
1448         /* Big hammer */
1449         if (!ha->flags.host_shutting_down &&
1450             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1451                 qlt_disable_vha(vha);
1452
1453         /* Wait for sessions to clear out (just in case) */
1454         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1455         return 0;
1456 }
1457 EXPORT_SYMBOL(qlt_stop_phase1);
1458
1459 /* Called by tcm_qla2xxx configfs code */
1460 void qlt_stop_phase2(struct qla_tgt *tgt)
1461 {
1462         struct qla_hw_data *ha = tgt->ha;
1463         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1464         unsigned long flags;
1465
1466         if (tgt->tgt_stopped) {
1467                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1468                     "Already in tgt->tgt_stopped state\n");
1469                 dump_stack();
1470                 return;
1471         }
1472
1473         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1474             "Waiting for %d IRQ commands to complete (tgt %p)",
1475             tgt->irq_cmd_count, tgt);
1476
1477         mutex_lock(&vha->vha_tgt.tgt_mutex);
1478         spin_lock_irqsave(&ha->hardware_lock, flags);
1479         while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
1480                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1481                 udelay(2);
1482                 spin_lock_irqsave(&ha->hardware_lock, flags);
1483         }
1484         tgt->tgt_stop = 0;
1485         tgt->tgt_stopped = 1;
1486         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1487         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1488
1489         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1490             tgt);
1491 }
1492 EXPORT_SYMBOL(qlt_stop_phase2);
1493
1494 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1495 static void qlt_release(struct qla_tgt *tgt)
1496 {
1497         scsi_qla_host_t *vha = tgt->vha;
1498
1499         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1500                 qlt_stop_phase2(tgt);
1501
1502         vha->vha_tgt.qla_tgt = NULL;
1503
1504         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1505             "Release of tgt %p finished\n", tgt);
1506
1507         kfree(tgt);
1508 }
1509
1510 /* ha->hardware_lock supposed to be held on entry */
1511 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1512         const void *param, unsigned int param_size)
1513 {
1514         struct qla_tgt_sess_work_param *prm;
1515         unsigned long flags;
1516
1517         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1518         if (!prm) {
1519                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1520                     "qla_target(%d): Unable to create session "
1521                     "work, command will be refused", 0);
1522                 return -ENOMEM;
1523         }
1524
1525         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1526             "Scheduling work (type %d, prm %p)"
1527             " to find session for param %p (size %d, tgt %p)\n",
1528             type, prm, param, param_size, tgt);
1529
1530         prm->type = type;
1531         memcpy(&prm->tm_iocb, param, param_size);
1532
1533         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1534         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1535         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1536
1537         schedule_work(&tgt->sess_work);
1538
1539         return 0;
1540 }
1541
1542 /*
1543  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1544  */
1545 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1546         struct imm_ntfy_from_isp *ntfy,
1547         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1548         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1549 {
1550         struct qla_hw_data *ha = vha->hw;
1551         request_t *pkt;
1552         struct nack_to_isp *nack;
1553
1554         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1555
1556         /* Send marker if required */
1557         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1558                 return;
1559
1560         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1561         if (!pkt) {
1562                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1563                     "qla_target(%d): %s failed: unable to allocate "
1564                     "request packet\n", vha->vp_idx, __func__);
1565                 return;
1566         }
1567
1568         if (vha->vha_tgt.qla_tgt != NULL)
1569                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1570
1571         pkt->entry_type = NOTIFY_ACK_TYPE;
1572         pkt->entry_count = 1;
1573
1574         nack = (struct nack_to_isp *)pkt;
1575         nack->ox_id = ntfy->ox_id;
1576
1577         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1578         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1579         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1580                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1581                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1582         }
1583         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1584         nack->u.isp24.status = ntfy->u.isp24.status;
1585         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1586         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1587         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1588         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1589         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1590         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1591         nack->u.isp24.srr_reject_code = srr_reject_code;
1592         nack->u.isp24.srr_reject_code_expl = srr_explan;
1593         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1594
1595         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1596             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1597             vha->vp_idx, nack->u.isp24.status);
1598
1599         /* Memory Barrier */
1600         wmb();
1601         qla2x00_start_iocbs(vha, vha->req);
1602 }
1603
1604 /*
1605  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1606  */
1607 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1608         struct abts_recv_from_24xx *abts, uint32_t status,
1609         bool ids_reversed)
1610 {
1611         struct qla_hw_data *ha = vha->hw;
1612         struct abts_resp_to_24xx *resp;
1613         uint32_t f_ctl;
1614         uint8_t *p;
1615
1616         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1617             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1618             ha, abts, status);
1619
1620         /* Send marker if required */
1621         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1622                 return;
1623
1624         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1625         if (!resp) {
1626                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1627                     "qla_target(%d): %s failed: unable to allocate "
1628                     "request packet", vha->vp_idx, __func__);
1629                 return;
1630         }
1631
1632         resp->entry_type = ABTS_RESP_24XX;
1633         resp->entry_count = 1;
1634         resp->nport_handle = abts->nport_handle;
1635         resp->vp_index = vha->vp_idx;
1636         resp->sof_type = abts->sof_type;
1637         resp->exchange_address = abts->exchange_address;
1638         resp->fcp_hdr_le = abts->fcp_hdr_le;
1639         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1640             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1641             F_CTL_SEQ_INITIATIVE);
1642         p = (uint8_t *)&f_ctl;
1643         resp->fcp_hdr_le.f_ctl[0] = *p++;
1644         resp->fcp_hdr_le.f_ctl[1] = *p++;
1645         resp->fcp_hdr_le.f_ctl[2] = *p;
1646         if (ids_reversed) {
1647                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1648                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1649                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1650                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1651                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1652                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1653         } else {
1654                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1655                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1656                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1657                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1658                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1659                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1660         }
1661         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1662         if (status == FCP_TMF_CMPL) {
1663                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1664                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1665                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1666                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1667                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1668                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1669         } else {
1670                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1671                 resp->payload.ba_rjt.reason_code =
1672                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1673                 /* Other bytes are zero */
1674         }
1675
1676         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1677
1678         /* Memory Barrier */
1679         wmb();
1680         qla2x00_start_iocbs(vha, vha->req);
1681 }
1682
1683 /*
1684  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1685  */
1686 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1687         struct abts_resp_from_24xx_fw *entry)
1688 {
1689         struct ctio7_to_24xx *ctio;
1690
1691         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1692             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1693         /* Send marker if required */
1694         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1695                 return;
1696
1697         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1698         if (ctio == NULL) {
1699                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1700                     "qla_target(%d): %s failed: unable to allocate "
1701                     "request packet\n", vha->vp_idx, __func__);
1702                 return;
1703         }
1704
1705         /*
1706          * We've got on entrance firmware's response on by us generated
1707          * ABTS response. So, in it ID fields are reversed.
1708          */
1709
1710         ctio->entry_type = CTIO_TYPE7;
1711         ctio->entry_count = 1;
1712         ctio->nport_handle = entry->nport_handle;
1713         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1714         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1715         ctio->vp_index = vha->vp_idx;
1716         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1717         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1718         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1719         ctio->exchange_addr = entry->exchange_addr_to_abort;
1720         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1721                                             CTIO7_FLAGS_TERMINATE);
1722         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1723
1724         /* Memory Barrier */
1725         wmb();
1726         qla2x00_start_iocbs(vha, vha->req);
1727
1728         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1729             FCP_TMF_CMPL, true);
1730 }
1731
1732 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1733 {
1734         struct qla_tgt_sess_op *op;
1735         struct qla_tgt_cmd *cmd;
1736
1737         spin_lock(&vha->cmd_list_lock);
1738
1739         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1740                 if (tag == op->atio.u.isp24.exchange_addr) {
1741                         op->aborted = true;
1742                         spin_unlock(&vha->cmd_list_lock);
1743                         return 1;
1744                 }
1745         }
1746
1747         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1748                 if (tag == op->atio.u.isp24.exchange_addr) {
1749                         op->aborted = true;
1750                         spin_unlock(&vha->cmd_list_lock);
1751                         return 1;
1752                 }
1753         }
1754
1755         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1756                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1757                         cmd->aborted = 1;
1758                         spin_unlock(&vha->cmd_list_lock);
1759                         return 1;
1760                 }
1761         }
1762
1763         spin_unlock(&vha->cmd_list_lock);
1764         return 0;
1765 }
1766
1767 /* drop cmds for the given lun
1768  * XXX only looks for cmds on the port through which lun reset was recieved
1769  * XXX does not go through the list of other port (which may have cmds
1770  *     for the same lun)
1771  */
1772 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1773                                 uint32_t lun, uint8_t *s_id)
1774 {
1775         struct qla_tgt_sess_op *op;
1776         struct qla_tgt_cmd *cmd;
1777         uint32_t key;
1778
1779         key = sid_to_key(s_id);
1780         spin_lock(&vha->cmd_list_lock);
1781         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1782                 uint32_t op_key;
1783                 uint32_t op_lun;
1784
1785                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1786                 op_lun = scsilun_to_int(
1787                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1788                 if (op_key == key && op_lun == lun)
1789                         op->aborted = true;
1790         }
1791
1792         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1793                 uint32_t op_key;
1794                 u64 op_lun;
1795
1796                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1797                 op_lun = scsilun_to_int(
1798                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1799                 if (op_key == key && op_lun == lun)
1800                         op->aborted = true;
1801         }
1802
1803         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1804                 uint32_t cmd_key;
1805                 uint32_t cmd_lun;
1806
1807                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1808                 cmd_lun = scsilun_to_int(
1809                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1810                 if (cmd_key == key && cmd_lun == lun)
1811                         cmd->aborted = 1;
1812         }
1813         spin_unlock(&vha->cmd_list_lock);
1814 }
1815
1816 /* ha->hardware_lock supposed to be held on entry */
1817 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1818         struct abts_recv_from_24xx *abts, struct fc_port *sess)
1819 {
1820         struct qla_hw_data *ha = vha->hw;
1821         struct se_session *se_sess = sess->se_sess;
1822         struct qla_tgt_mgmt_cmd *mcmd;
1823         struct se_cmd *se_cmd;
1824         u32 lun = 0;
1825         int rc;
1826         bool found_lun = false;
1827         unsigned long flags;
1828
1829         spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
1830         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1831                 struct qla_tgt_cmd *cmd =
1832                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1833                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1834                         lun = cmd->unpacked_lun;
1835                         found_lun = true;
1836                         break;
1837                 }
1838         }
1839         spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
1840
1841         /* cmd not in LIO lists, look in qla list */
1842         if (!found_lun) {
1843                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1844                         /* send TASK_ABORT response immediately */
1845                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1846                         return 0;
1847                 } else {
1848                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1849                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1850                             abts->exchange_addr_to_abort);
1851                         return -ENOENT;
1852                 }
1853         }
1854
1855         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1856             "qla_target(%d): task abort (tag=%d)\n",
1857             vha->vp_idx, abts->exchange_addr_to_abort);
1858
1859         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1860         if (mcmd == NULL) {
1861                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1862                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1863                     vha->vp_idx, __func__);
1864                 return -ENOMEM;
1865         }
1866         memset(mcmd, 0, sizeof(*mcmd));
1867
1868         mcmd->sess = sess;
1869         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1870         mcmd->reset_count = vha->hw->chip_reset;
1871         mcmd->tmr_func = QLA_TGT_ABTS;
1872
1873         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func,
1874             abts->exchange_addr_to_abort);
1875         if (rc != 0) {
1876                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1877                     "qla_target(%d):  tgt_ops->handle_tmr()"
1878                     " failed: %d", vha->vp_idx, rc);
1879                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1880                 return -EFAULT;
1881         }
1882
1883         return 0;
1884 }
1885
1886 /*
1887  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1888  */
1889 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1890         struct abts_recv_from_24xx *abts)
1891 {
1892         struct qla_hw_data *ha = vha->hw;
1893         struct fc_port *sess;
1894         uint32_t tag = abts->exchange_addr_to_abort;
1895         uint8_t s_id[3];
1896         int rc;
1897         unsigned long flags;
1898
1899         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1900                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1901                     "qla_target(%d): ABTS: Abort Sequence not "
1902                     "supported\n", vha->vp_idx);
1903                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1904                 return;
1905         }
1906
1907         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1908                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1909                     "qla_target(%d): ABTS: Unknown Exchange "
1910                     "Address received\n", vha->vp_idx);
1911                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1912                 return;
1913         }
1914
1915         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1916             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1917             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1918             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1919             le32_to_cpu(abts->fcp_hdr_le.parameter));
1920
1921         s_id[0] = abts->fcp_hdr_le.s_id[2];
1922         s_id[1] = abts->fcp_hdr_le.s_id[1];
1923         s_id[2] = abts->fcp_hdr_le.s_id[0];
1924
1925         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1926         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1927         if (!sess) {
1928                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1929                     "qla_target(%d): task abort for non-existant session\n",
1930                     vha->vp_idx);
1931                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1932                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1933
1934                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1935
1936                 if (rc != 0) {
1937                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1938                             false);
1939                 }
1940                 return;
1941         }
1942         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1943
1944
1945         if (sess->deleted) {
1946                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1947                 return;
1948         }
1949
1950         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1951         if (rc != 0) {
1952                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1953                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1954                     vha->vp_idx, rc);
1955                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1956                 return;
1957         }
1958 }
1959
1960 /*
1961  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1962  */
1963 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1964         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1965 {
1966         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1967         struct ctio7_to_24xx *ctio;
1968         uint16_t temp;
1969
1970         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1971             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1972             ha, atio, resp_code);
1973
1974         /* Send marker if required */
1975         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1976                 return;
1977
1978         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1979         if (ctio == NULL) {
1980                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1981                     "qla_target(%d): %s failed: unable to allocate "
1982                     "request packet\n", ha->vp_idx, __func__);
1983                 return;
1984         }
1985
1986         ctio->entry_type = CTIO_TYPE7;
1987         ctio->entry_count = 1;
1988         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1989         ctio->nport_handle = mcmd->sess->loop_id;
1990         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1991         ctio->vp_index = ha->vp_idx;
1992         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1993         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1994         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1995         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1996         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1997             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1998         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1999         ctio->u.status1.ox_id = cpu_to_le16(temp);
2000         ctio->u.status1.scsi_status =
2001             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2002         ctio->u.status1.response_len = cpu_to_le16(8);
2003         ctio->u.status1.sense_data[0] = resp_code;
2004
2005         /* Memory Barrier */
2006         wmb();
2007         qla2x00_start_iocbs(ha, ha->req);
2008 }
2009
2010 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2011 {
2012         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2013 }
2014 EXPORT_SYMBOL(qlt_free_mcmd);
2015
2016 /* callback from target fabric module code */
2017 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2018 {
2019         struct scsi_qla_host *vha = mcmd->sess->vha;
2020         struct qla_hw_data *ha = vha->hw;
2021         unsigned long flags;
2022
2023         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2024             "TM response mcmd (%p) status %#x state %#x",
2025             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2026
2027         spin_lock_irqsave(&ha->hardware_lock, flags);
2028
2029         if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
2030                 /*
2031                  * Either the port is not online or this request was from
2032                  * previous life, just abort the processing.
2033                  */
2034                 ql_dbg(ql_dbg_async, vha, 0xe100,
2035                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2036                         vha->flags.online, qla2x00_reset_active(vha),
2037                         mcmd->reset_count, ha->chip_reset);
2038                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2039                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2040                 return;
2041         }
2042
2043         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2044                 if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2045                     ELS_LOGO ||
2046                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2047                     ELS_PRLO ||
2048                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2049                     ELS_TPRLO) {
2050                         ql_dbg(ql_dbg_disc, vha, 0xffff,
2051                             "TM response logo %phC status %#x state %#x",
2052                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2053                             mcmd->flags);
2054                         qlt_schedule_sess_for_deletion_lock(mcmd->sess);
2055                 } else {
2056                         qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
2057                                 0, 0, 0, 0, 0, 0);
2058                 }
2059         } else {
2060                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2061                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
2062                             mcmd->fc_tm_rsp, false);
2063                 else
2064                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
2065                             mcmd->fc_tm_rsp);
2066         }
2067         /*
2068          * Make the callback for ->free_mcmd() to queue_work() and invoke
2069          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2070          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2071          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2072          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2073          * qlt_xmit_tm_rsp() returns here..
2074          */
2075         ha->tgt.tgt_ops->free_mcmd(mcmd);
2076         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2077 }
2078 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2079
2080 /* No locks */
2081 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2082 {
2083         struct qla_tgt_cmd *cmd = prm->cmd;
2084
2085         BUG_ON(cmd->sg_cnt == 0);
2086
2087         prm->sg = (struct scatterlist *)cmd->sg;
2088         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
2089             cmd->sg_cnt, cmd->dma_data_direction);
2090         if (unlikely(prm->seg_cnt == 0))
2091                 goto out_err;
2092
2093         prm->cmd->sg_mapped = 1;
2094
2095         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2096                 /*
2097                  * If greater than four sg entries then we need to allocate
2098                  * the continuation entries
2099                  */
2100                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
2101                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2102                         prm->tgt->datasegs_per_cmd,
2103                         prm->tgt->datasegs_per_cont);
2104         } else {
2105                 /* DIF */
2106                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2107                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2108                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2109                         prm->tot_dsds = prm->seg_cnt;
2110                 } else
2111                         prm->tot_dsds = prm->seg_cnt;
2112
2113                 if (cmd->prot_sg_cnt) {
2114                         prm->prot_sg      = cmd->prot_sg;
2115                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
2116                                 cmd->prot_sg, cmd->prot_sg_cnt,
2117                                 cmd->dma_data_direction);
2118                         if (unlikely(prm->prot_seg_cnt == 0))
2119                                 goto out_err;
2120
2121                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2122                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2123                                 /* Dif Bundling not support here */
2124                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2125                                                                 cmd->blk_sz);
2126                                 prm->tot_dsds += prm->prot_seg_cnt;
2127                         } else
2128                                 prm->tot_dsds += prm->prot_seg_cnt;
2129                 }
2130         }
2131
2132         return 0;
2133
2134 out_err:
2135         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
2136             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2137             0, prm->cmd->sg_cnt);
2138         return -1;
2139 }
2140
2141 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2142 {
2143         struct qla_hw_data *ha = vha->hw;
2144
2145         if (!cmd->sg_mapped)
2146                 return;
2147
2148         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
2149         cmd->sg_mapped = 0;
2150
2151         if (cmd->prot_sg_cnt)
2152                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2153                         cmd->dma_data_direction);
2154
2155         if (cmd->ctx_dsd_alloced)
2156                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
2157
2158         if (cmd->ctx)
2159                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2160 }
2161
2162 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
2163         uint32_t req_cnt)
2164 {
2165         uint32_t cnt, cnt_in;
2166
2167         if (vha->req->cnt < (req_cnt + 2)) {
2168                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
2169                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
2170
2171                 if  (vha->req->ring_index < cnt)
2172                         vha->req->cnt = cnt - vha->req->ring_index;
2173                 else
2174                         vha->req->cnt = vha->req->length -
2175                             (vha->req->ring_index - cnt);
2176
2177                 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
2178                         ql_dbg(ql_dbg_io, vha, 0x305a,
2179                             "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
2180                             vha->vp_idx, vha->req->ring_index,
2181                             vha->req->cnt, req_cnt, cnt, cnt_in,
2182                             vha->req->length);
2183                         return -EAGAIN;
2184                 }
2185         }
2186
2187         vha->req->cnt -= req_cnt;
2188
2189         return 0;
2190 }
2191
2192 /*
2193  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2194  */
2195 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
2196 {
2197         /* Adjust ring index. */
2198         vha->req->ring_index++;
2199         if (vha->req->ring_index == vha->req->length) {
2200                 vha->req->ring_index = 0;
2201                 vha->req->ring_ptr = vha->req->ring;
2202         } else {
2203                 vha->req->ring_ptr++;
2204         }
2205         return (cont_entry_t *)vha->req->ring_ptr;
2206 }
2207
2208 /* ha->hardware_lock supposed to be held on entry */
2209 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
2210 {
2211         struct qla_hw_data *ha = vha->hw;
2212         uint32_t h;
2213
2214         h = ha->tgt.current_handle;
2215         /* always increment cmd handle */
2216         do {
2217                 ++h;
2218                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
2219                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
2220                 if (h == ha->tgt.current_handle) {
2221                         ql_dbg(ql_dbg_io, vha, 0x305b,
2222                             "qla_target(%d): Ran out of "
2223                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
2224                         h = QLA_TGT_NULL_HANDLE;
2225                         break;
2226                 }
2227         } while ((h == QLA_TGT_NULL_HANDLE) ||
2228             (h == QLA_TGT_SKIP_HANDLE) ||
2229             (ha->tgt.cmds[h-1] != NULL));
2230
2231         if (h != QLA_TGT_NULL_HANDLE)
2232                 ha->tgt.current_handle = h;
2233
2234         return h;
2235 }
2236
2237 /* ha->hardware_lock supposed to be held on entry */
2238 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
2239         struct scsi_qla_host *vha)
2240 {
2241         uint32_t h;
2242         struct ctio7_to_24xx *pkt;
2243         struct qla_hw_data *ha = vha->hw;
2244         struct atio_from_isp *atio = &prm->cmd->atio;
2245         uint16_t temp;
2246
2247         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
2248         prm->pkt = pkt;
2249         memset(pkt, 0, sizeof(*pkt));
2250
2251         pkt->entry_type = CTIO_TYPE7;
2252         pkt->entry_count = (uint8_t)prm->req_cnt;
2253         pkt->vp_index = vha->vp_idx;
2254
2255         h = qlt_make_handle(vha);
2256         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2257                 /*
2258                  * CTIO type 7 from the firmware doesn't provide a way to
2259                  * know the initiator's LOOP ID, hence we can't find
2260                  * the session and, so, the command.
2261                  */
2262                 return -EAGAIN;
2263         } else
2264                 ha->tgt.cmds[h-1] = prm->cmd;
2265
2266         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2267         pkt->nport_handle = prm->cmd->loop_id;
2268         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2269         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2270         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2271         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2272         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2273         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
2274         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2275         pkt->u.status0.ox_id = cpu_to_le16(temp);
2276         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2277
2278         return 0;
2279 }
2280
2281 /*
2282  * ha->hardware_lock supposed to be held on entry. We have already made sure
2283  * that there is sufficient amount of request entries to not drop it.
2284  */
2285 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
2286         struct scsi_qla_host *vha)
2287 {
2288         int cnt;
2289         uint32_t *dword_ptr;
2290         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2291
2292         /* Build continuation packets */
2293         while (prm->seg_cnt > 0) {
2294                 cont_a64_entry_t *cont_pkt64 =
2295                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
2296
2297                 /*
2298                  * Make sure that from cont_pkt64 none of
2299                  * 64-bit specific fields used for 32-bit
2300                  * addressing. Cast to (cont_entry_t *) for
2301                  * that.
2302                  */
2303
2304                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2305
2306                 cont_pkt64->entry_count = 1;
2307                 cont_pkt64->sys_define = 0;
2308
2309                 if (enable_64bit_addressing) {
2310                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2311                         dword_ptr =
2312                             (uint32_t *)&cont_pkt64->dseg_0_address;
2313                 } else {
2314                         cont_pkt64->entry_type = CONTINUE_TYPE;
2315                         dword_ptr =
2316                             (uint32_t *)&((cont_entry_t *)
2317                                 cont_pkt64)->dseg_0_address;
2318                 }
2319
2320                 /* Load continuation entry data segments */
2321                 for (cnt = 0;
2322                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
2323                     cnt++, prm->seg_cnt--) {
2324                         *dword_ptr++ =
2325                             cpu_to_le32(pci_dma_lo32
2326                                 (sg_dma_address(prm->sg)));
2327                         if (enable_64bit_addressing) {
2328                                 *dword_ptr++ =
2329                                     cpu_to_le32(pci_dma_hi32
2330                                         (sg_dma_address
2331                                         (prm->sg)));
2332                         }
2333                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2334
2335                         prm->sg = sg_next(prm->sg);
2336                 }
2337         }
2338 }
2339
2340 /*
2341  * ha->hardware_lock supposed to be held on entry. We have already made sure
2342  * that there is sufficient amount of request entries to not drop it.
2343  */
2344 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
2345         struct scsi_qla_host *vha)
2346 {
2347         int cnt;
2348         uint32_t *dword_ptr;
2349         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2350         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2351
2352         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2353
2354         /* Setup packet address segment pointer */
2355         dword_ptr = pkt24->u.status0.dseg_0_address;
2356
2357         /* Set total data segment count */
2358         if (prm->seg_cnt)
2359                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2360
2361         if (prm->seg_cnt == 0) {
2362                 /* No data transfer */
2363                 *dword_ptr++ = 0;
2364                 *dword_ptr = 0;
2365                 return;
2366         }
2367
2368         /* If scatter gather */
2369
2370         /* Load command entry data segments */
2371         for (cnt = 0;
2372             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
2373             cnt++, prm->seg_cnt--) {
2374                 *dword_ptr++ =
2375                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2376                 if (enable_64bit_addressing) {
2377                         *dword_ptr++ =
2378                             cpu_to_le32(pci_dma_hi32(
2379                                 sg_dma_address(prm->sg)));
2380                 }
2381                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2382
2383                 prm->sg = sg_next(prm->sg);
2384         }
2385
2386         qlt_load_cont_data_segments(prm, vha);
2387 }
2388
2389 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2390 {
2391         return cmd->bufflen > 0;
2392 }
2393
2394 /*
2395  * Called without ha->hardware_lock held
2396  */
2397 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2398         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2399         uint32_t *full_req_cnt)
2400 {
2401         struct qla_tgt *tgt = cmd->tgt;
2402         struct scsi_qla_host *vha = tgt->vha;
2403         struct qla_hw_data *ha = vha->hw;
2404         struct se_cmd *se_cmd = &cmd->se_cmd;
2405
2406         prm->cmd = cmd;
2407         prm->tgt = tgt;
2408         prm->rq_result = scsi_status;
2409         prm->sense_buffer = &cmd->sense_buffer[0];
2410         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2411         prm->sg = NULL;
2412         prm->seg_cnt = -1;
2413         prm->req_cnt = 1;
2414         prm->add_status_pkt = 0;
2415
2416         /* Send marker if required */
2417         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2418                 return -EFAULT;
2419
2420         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2421                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2422                         return -EAGAIN;
2423         }
2424
2425         *full_req_cnt = prm->req_cnt;
2426
2427         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2428                 prm->residual = se_cmd->residual_count;
2429                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
2430                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2431                        prm->residual, se_cmd->tag,
2432                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2433                        cmd->bufflen, prm->rq_result);
2434                 prm->rq_result |= SS_RESIDUAL_UNDER;
2435         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2436                 prm->residual = se_cmd->residual_count;
2437                 ql_dbg(ql_dbg_io, vha, 0x305d,
2438                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2439                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2440                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2441                 prm->rq_result |= SS_RESIDUAL_OVER;
2442         }
2443
2444         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2445                 /*
2446                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2447                  * ignored in *xmit_response() below
2448                  */
2449                 if (qlt_has_data(cmd)) {
2450                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2451                             (IS_FWI2_CAPABLE(ha) &&
2452                             (prm->rq_result != 0))) {
2453                                 prm->add_status_pkt = 1;
2454                                 (*full_req_cnt)++;
2455                         }
2456                 }
2457         }
2458
2459         return 0;
2460 }
2461
2462 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
2463         struct qla_tgt_cmd *cmd, int sending_sense)
2464 {
2465         if (ha->tgt.enable_class_2)
2466                 return 0;
2467
2468         if (sending_sense)
2469                 return cmd->conf_compl_supported;
2470         else
2471                 return ha->tgt.enable_explicit_conf &&
2472                     cmd->conf_compl_supported;
2473 }
2474
2475 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2476         struct qla_tgt_prm *prm)
2477 {
2478         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2479             (uint32_t)sizeof(ctio->u.status1.sense_data));
2480         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2481         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2482                 ctio->u.status0.flags |= cpu_to_le16(
2483                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2484                     CTIO7_FLAGS_CONFORM_REQ);
2485         }
2486         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2487         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2488         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2489                 int i;
2490
2491                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2492                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2493                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2494                                     "Skipping EXPLICIT_CONFORM and "
2495                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2496                                     "non GOOD status\n");
2497                                 goto skip_explict_conf;
2498                         }
2499                         ctio->u.status1.flags |= cpu_to_le16(
2500                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2501                             CTIO7_FLAGS_CONFORM_REQ);
2502                 }
2503 skip_explict_conf:
2504                 ctio->u.status1.flags &=
2505                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2506                 ctio->u.status1.flags |=
2507                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2508                 ctio->u.status1.scsi_status |=
2509                     cpu_to_le16(SS_SENSE_LEN_VALID);
2510                 ctio->u.status1.sense_length =
2511                     cpu_to_le16(prm->sense_buffer_len);
2512                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2513                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2514                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2515 #if 0
2516                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2517                         static int q;
2518                         if (q < 10) {
2519                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2520                                     "qla_target(%d): %d bytes of sense "
2521                                     "lost", prm->tgt->ha->vp_idx,
2522                                     prm->sense_buffer_len % 4);
2523                                 q++;
2524                         }
2525                 }
2526 #endif
2527         } else {
2528                 ctio->u.status1.flags &=
2529                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2530                 ctio->u.status1.flags |=
2531                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2532                 ctio->u.status1.sense_length = 0;
2533                 memset(ctio->u.status1.sense_data, 0,
2534                     sizeof(ctio->u.status1.sense_data));
2535         }
2536
2537         /* Sense with len > 24, is it possible ??? */
2538 }
2539
2540
2541
2542 /* diff  */
2543 static inline int
2544 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2545 {
2546         /*
2547          * Uncomment when corresponding SCSI changes are done.
2548          *
2549          if (!sp->cmd->prot_chk)
2550          return 0;
2551          *
2552          */
2553         switch (se_cmd->prot_op) {
2554         case TARGET_PROT_DOUT_INSERT:
2555         case TARGET_PROT_DIN_STRIP:
2556                 if (ql2xenablehba_err_chk >= 1)
2557                         return 1;
2558                 break;
2559         case TARGET_PROT_DOUT_PASS:
2560         case TARGET_PROT_DIN_PASS:
2561                 if (ql2xenablehba_err_chk >= 2)
2562                         return 1;
2563                 break;
2564         case TARGET_PROT_DIN_INSERT:
2565         case TARGET_PROT_DOUT_STRIP:
2566                 return 1;
2567         default:
2568                 break;
2569         }
2570         return 0;
2571 }
2572
2573 /*
2574  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2575  *
2576  */
2577 static inline void
2578 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2579 {
2580         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2581
2582         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2583          * have been immplemented by TCM, before AppTag is avail.
2584          * Look for modesense_handlers[]
2585          */
2586         ctx->app_tag = 0;
2587         ctx->app_tag_mask[0] = 0x0;
2588         ctx->app_tag_mask[1] = 0x0;
2589
2590         switch (se_cmd->prot_type) {
2591         case TARGET_DIF_TYPE0_PROT:
2592                 /*
2593                  * No check for ql2xenablehba_err_chk, as it would be an
2594                  * I/O error if hba tag generation is not done.
2595                  */
2596                 ctx->ref_tag = cpu_to_le32(lba);
2597
2598                 if (!qlt_hba_err_chk_enabled(se_cmd))
2599                         break;
2600
2601                 /* enable ALL bytes of the ref tag */
2602                 ctx->ref_tag_mask[0] = 0xff;
2603                 ctx->ref_tag_mask[1] = 0xff;
2604                 ctx->ref_tag_mask[2] = 0xff;
2605                 ctx->ref_tag_mask[3] = 0xff;
2606                 break;
2607         /*
2608          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2609          * 16 bit app tag.
2610          */
2611         case TARGET_DIF_TYPE1_PROT:
2612                 ctx->ref_tag = cpu_to_le32(lba);
2613
2614                 if (!qlt_hba_err_chk_enabled(se_cmd))
2615                         break;
2616
2617                 /* enable ALL bytes of the ref tag */
2618                 ctx->ref_tag_mask[0] = 0xff;
2619                 ctx->ref_tag_mask[1] = 0xff;
2620                 ctx->ref_tag_mask[2] = 0xff;
2621                 ctx->ref_tag_mask[3] = 0xff;
2622                 break;
2623         /*
2624          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2625          * match LBA in CDB + N
2626          */
2627         case TARGET_DIF_TYPE2_PROT:
2628                 ctx->ref_tag = cpu_to_le32(lba);
2629
2630                 if (!qlt_hba_err_chk_enabled(se_cmd))
2631                         break;
2632
2633                 /* enable ALL bytes of the ref tag */
2634                 ctx->ref_tag_mask[0] = 0xff;
2635                 ctx->ref_tag_mask[1] = 0xff;
2636                 ctx->ref_tag_mask[2] = 0xff;
2637                 ctx->ref_tag_mask[3] = 0xff;
2638                 break;
2639
2640         /* For Type 3 protection: 16 bit GUARD only */
2641         case TARGET_DIF_TYPE3_PROT:
2642                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2643                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2644                 break;
2645         }
2646 }
2647
2648
2649 static inline int
2650 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2651 {
2652         uint32_t                *cur_dsd;
2653         uint32_t                transfer_length = 0;
2654         uint32_t                data_bytes;
2655         uint32_t                dif_bytes;
2656         uint8_t                 bundling = 1;
2657         uint8_t                 *clr_ptr;
2658         struct crc_context      *crc_ctx_pkt = NULL;
2659         struct qla_hw_data      *ha;
2660         struct ctio_crc2_to_fw  *pkt;
2661         dma_addr_t              crc_ctx_dma;
2662         uint16_t                fw_prot_opts = 0;
2663         struct qla_tgt_cmd      *cmd = prm->cmd;
2664         struct se_cmd           *se_cmd = &cmd->se_cmd;
2665         uint32_t h;
2666         struct atio_from_isp *atio = &prm->cmd->atio;
2667         uint16_t t16;
2668
2669         ha = vha->hw;
2670
2671         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2672         prm->pkt = pkt;
2673         memset(pkt, 0, sizeof(*pkt));
2674
2675         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2676                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2677                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2678                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2679
2680         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2681             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2682                 bundling = 0;
2683
2684         /* Compute dif len and adjust data len to incude protection */
2685         data_bytes = cmd->bufflen;
2686         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2687
2688         switch (se_cmd->prot_op) {
2689         case TARGET_PROT_DIN_INSERT:
2690         case TARGET_PROT_DOUT_STRIP:
2691                 transfer_length = data_bytes;
2692                 data_bytes += dif_bytes;
2693                 break;
2694
2695         case TARGET_PROT_DIN_STRIP:
2696         case TARGET_PROT_DOUT_INSERT:
2697         case TARGET_PROT_DIN_PASS:
2698         case TARGET_PROT_DOUT_PASS:
2699                 transfer_length = data_bytes + dif_bytes;
2700                 break;
2701
2702         default:
2703                 BUG();
2704                 break;
2705         }
2706
2707         if (!qlt_hba_err_chk_enabled(se_cmd))
2708                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2709         /* HBA error checking enabled */
2710         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2711                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2712                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2713                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2714                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2715                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2716         }
2717
2718         switch (se_cmd->prot_op) {
2719         case TARGET_PROT_DIN_INSERT:
2720         case TARGET_PROT_DOUT_INSERT:
2721                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2722                 break;
2723         case TARGET_PROT_DIN_STRIP:
2724         case TARGET_PROT_DOUT_STRIP:
2725                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2726                 break;
2727         case TARGET_PROT_DIN_PASS:
2728         case TARGET_PROT_DOUT_PASS:
2729                 fw_prot_opts |= PO_MODE_DIF_PASS;
2730                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2731                 break;
2732         default:/* Normal Request */
2733                 fw_prot_opts |= PO_MODE_DIF_PASS;
2734                 break;
2735         }
2736
2737
2738         /* ---- PKT ---- */
2739         /* Update entry type to indicate Command Type CRC_2 IOCB */
2740         pkt->entry_type  = CTIO_CRC2;
2741         pkt->entry_count = 1;
2742         pkt->vp_index = vha->vp_idx;
2743
2744         h = qlt_make_handle(vha);
2745         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2746                 /*
2747                  * CTIO type 7 from the firmware doesn't provide a way to
2748                  * know the initiator's LOOP ID, hence we can't find
2749                  * the session and, so, the command.
2750                  */
2751                 return -EAGAIN;
2752         } else
2753                 ha->tgt.cmds[h-1] = prm->cmd;
2754
2755
2756         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2757         pkt->nport_handle = prm->cmd->loop_id;
2758         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2759         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2760         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2761         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2762         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2763
2764         /* silence compile warning */
2765         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2766         pkt->ox_id  = cpu_to_le16(t16);
2767
2768         t16 = (atio->u.isp24.attr << 9);
2769         pkt->flags |= cpu_to_le16(t16);
2770         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2771
2772         /* Set transfer direction */
2773         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2774                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2775         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2776                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2777
2778
2779         pkt->dseg_count = prm->tot_dsds;
2780         /* Fibre channel byte count */
2781         pkt->transfer_length = cpu_to_le32(transfer_length);
2782
2783
2784         /* ----- CRC context -------- */
2785
2786         /* Allocate CRC context from global pool */
2787         crc_ctx_pkt = cmd->ctx =
2788             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2789
2790         if (!crc_ctx_pkt)
2791                 goto crc_queuing_error;
2792
2793         /* Zero out CTX area. */
2794         clr_ptr = (uint8_t *)crc_ctx_pkt;
2795         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2796
2797         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2798         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2799
2800         /* Set handle */
2801         crc_ctx_pkt->handle = pkt->handle;
2802
2803         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2804
2805         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2806         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2807         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2808
2809
2810         if (!bundling) {
2811                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2812         } else {
2813                 /*
2814                  * Configure Bundling if we need to fetch interlaving
2815                  * protection PCI accesses
2816                  */
2817                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2818                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2819                 crc_ctx_pkt->u.bundling.dseg_count =
2820                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2821                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2822         }
2823
2824         /* Finish the common fields of CRC pkt */
2825         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2826         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2827         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2828         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2829
2830
2831         /* Walks data segments */
2832         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2833
2834         if (!bundling && prm->prot_seg_cnt) {
2835                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2836                         prm->tot_dsds, cmd))
2837                         goto crc_queuing_error;
2838         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2839                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2840                 goto crc_queuing_error;
2841
2842         if (bundling && prm->prot_seg_cnt) {
2843                 /* Walks dif segments */
2844                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2845
2846                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2847                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2848                         prm->prot_seg_cnt, cmd))
2849                         goto crc_queuing_error;
2850         }
2851         return QLA_SUCCESS;
2852
2853 crc_queuing_error:
2854         /* Cleanup will be performed by the caller */
2855
2856         return QLA_FUNCTION_FAILED;
2857 }
2858
2859
2860 /*
2861  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2862  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2863  */
2864 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2865         uint8_t scsi_status)
2866 {
2867         struct scsi_qla_host *vha = cmd->vha;
2868         struct qla_hw_data *ha = vha->hw;
2869         struct ctio7_to_24xx *pkt;
2870         struct qla_tgt_prm prm;
2871         uint32_t full_req_cnt = 0;
2872         unsigned long flags = 0;
2873         int res;
2874
2875         spin_lock_irqsave(&ha->hardware_lock, flags);
2876         if (cmd->sess && cmd->sess->deleted) {
2877                 cmd->state = QLA_TGT_STATE_PROCESSED;
2878                 if (cmd->sess->logout_completed)
2879                         /* no need to terminate. FW already freed exchange. */
2880                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2881                 else
2882                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
2883                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2884                 return 0;
2885         }
2886         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2887
2888         memset(&prm, 0, sizeof(prm));
2889
2890         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2891             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2892             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2893             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2894             &cmd->se_cmd);
2895
2896         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2897             &full_req_cnt);
2898         if (unlikely(res != 0)) {
2899                 return res;
2900         }
2901
2902         spin_lock_irqsave(&ha->hardware_lock, flags);
2903
2904         if (xmit_type == QLA_TGT_XMIT_STATUS)
2905                 vha->tgt_counters.core_qla_snd_status++;
2906         else
2907                 vha->tgt_counters.core_qla_que_buf++;
2908
2909         if (!vha->flags.online || cmd->reset_count != ha->chip_reset) {
2910                 /*
2911                  * Either the port is not online or this request was from
2912                  * previous life, just abort the processing.
2913                  */
2914                 cmd->state = QLA_TGT_STATE_PROCESSED;
2915                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2916                 ql_dbg(ql_dbg_async, vha, 0xe101,
2917                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
2918                         vha->flags.online, qla2x00_reset_active(vha),
2919                         cmd->reset_count, ha->chip_reset);
2920                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2921                 return 0;
2922         }
2923
2924         /* Does F/W have an IOCBs for this request */
2925         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2926         if (unlikely(res))
2927                 goto out_unmap_unlock;
2928
2929         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2930                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2931         else
2932                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2933         if (unlikely(res != 0)) {
2934                 vha->req->cnt += full_req_cnt;
2935                 goto out_unmap_unlock;
2936         }
2937
2938         pkt = (struct ctio7_to_24xx *)prm.pkt;
2939
2940         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2941                 pkt->u.status0.flags |=
2942                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2943                         CTIO7_FLAGS_STATUS_MODE_0);
2944
2945                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2946                         qlt_load_data_segments(&prm, vha);
2947
2948                 if (prm.add_status_pkt == 0) {
2949                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2950                                 pkt->u.status0.scsi_status =
2951                                     cpu_to_le16(prm.rq_result);
2952                                 pkt->u.status0.residual =
2953                                     cpu_to_le32(prm.residual);
2954                                 pkt->u.status0.flags |= cpu_to_le16(
2955                                     CTIO7_FLAGS_SEND_STATUS);
2956                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2957                                         pkt->u.status0.flags |=
2958                                             cpu_to_le16(
2959                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2960                                                 CTIO7_FLAGS_CONFORM_REQ);
2961                                 }
2962                         }
2963
2964                 } else {
2965                         /*
2966                          * We have already made sure that there is sufficient
2967                          * amount of request entries to not drop HW lock in
2968                          * req_pkt().
2969                          */
2970                         struct ctio7_to_24xx *ctio =
2971                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2972
2973                         ql_dbg(ql_dbg_io, vha, 0x305e,
2974                             "Building additional status packet 0x%p.\n",
2975                             ctio);
2976
2977                         /*
2978                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2979                          * ctio7_to_24xx
2980                          */
2981                         memcpy(ctio, pkt, sizeof(*ctio));
2982                         /* reset back to CTIO7 */
2983                         ctio->entry_count = 1;
2984                         ctio->entry_type = CTIO_TYPE7;
2985                         ctio->dseg_count = 0;
2986                         ctio->u.status1.flags &= ~cpu_to_le16(
2987                             CTIO7_FLAGS_DATA_IN);
2988
2989                         /* Real finish is ctio_m1's finish */
2990                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2991                         pkt->u.status0.flags |= cpu_to_le16(
2992                             CTIO7_FLAGS_DONT_RET_CTIO);
2993
2994                         /* qlt_24xx_init_ctio_to_isp will correct
2995                          * all neccessary fields that's part of CTIO7.
2996                          * There should be no residual of CTIO-CRC2 data.
2997                          */
2998                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2999                             &prm);
3000                         pr_debug("Status CTIO7: %p\n", ctio);
3001                 }
3002         } else
3003                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3004
3005
3006         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3007         cmd->cmd_sent_to_fw = 1;
3008
3009         /* Memory Barrier */
3010         wmb();
3011         qla2x00_start_iocbs(vha, vha->req);
3012         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3013
3014         return 0;
3015
3016 out_unmap_unlock:
3017         qlt_unmap_sg(vha, cmd);
3018         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3019
3020         return res;
3021 }
3022 EXPORT_SYMBOL(qlt_xmit_response);
3023
3024 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3025 {
3026         struct ctio7_to_24xx *pkt;
3027         struct scsi_qla_host *vha = cmd->vha;
3028         struct qla_hw_data *ha = vha->hw;
3029         struct qla_tgt *tgt = cmd->tgt;
3030         struct qla_tgt_prm prm;
3031         unsigned long flags;
3032         int res = 0;
3033
3034         memset(&prm, 0, sizeof(prm));
3035         prm.cmd = cmd;
3036         prm.tgt = tgt;
3037         prm.sg = NULL;
3038         prm.req_cnt = 1;
3039
3040         /* Send marker if required */
3041         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
3042                 return -EIO;
3043
3044         /* Calculate number of entries and segments required */
3045         if (qlt_pci_map_calc_cnt(&prm) != 0)
3046                 return -EAGAIN;
3047
3048         spin_lock_irqsave(&ha->hardware_lock, flags);
3049
3050         if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) ||
3051             (cmd->sess && cmd->sess->deleted)) {
3052                 /*
3053                  * Either the port is not online or this request was from
3054                  * previous life, just abort the processing.
3055                  */
3056                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3057                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3058                 ql_dbg(ql_dbg_async, vha, 0xe102,
3059                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3060                         vha->flags.online, qla2x00_reset_active(vha),
3061                         cmd->reset_count, ha->chip_reset);
3062                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3063                 return 0;
3064         }
3065
3066         /* Does F/W have an IOCBs for this request */
3067         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
3068         if (res != 0)
3069                 goto out_unlock_free_unmap;
3070         if (cmd->se_cmd.prot_op)
3071                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
3072         else
3073                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
3074
3075         if (unlikely(res != 0)) {
3076                 vha->req->cnt += prm.req_cnt;
3077                 goto out_unlock_free_unmap;
3078         }
3079
3080         pkt = (struct ctio7_to_24xx *)prm.pkt;
3081         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3082             CTIO7_FLAGS_STATUS_MODE_0);
3083
3084         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3085                 qlt_load_data_segments(&prm, vha);
3086
3087         cmd->state = QLA_TGT_STATE_NEED_DATA;
3088         cmd->cmd_sent_to_fw = 1;
3089
3090         /* Memory Barrier */
3091         wmb();
3092         qla2x00_start_iocbs(vha, vha->req);
3093         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3094
3095         return res;
3096
3097 out_unlock_free_unmap:
3098         qlt_unmap_sg(vha, cmd);
3099         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3100
3101         return res;
3102 }
3103 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3104
3105
3106 /*
3107  * Checks the guard or meta-data for the type of error
3108  * detected by the HBA.
3109  */
3110 static inline int
3111 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
3112                 struct ctio_crc_from_fw *sts)
3113 {
3114         uint8_t         *ap = &sts->actual_dif[0];
3115         uint8_t         *ep = &sts->expected_dif[0];
3116         uint32_t        e_ref_tag, a_ref_tag;
3117         uint16_t        e_app_tag, a_app_tag;
3118         uint16_t        e_guard, a_guard;
3119         uint64_t        lba = cmd->se_cmd.t_task_lba;
3120
3121         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3122         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3123         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3124
3125         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3126         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3127         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3128
3129         ql_dbg(ql_dbg_tgt, vha, 0xe075,
3130             "iocb(s) %p Returned STATUS.\n", sts);
3131
3132         ql_dbg(ql_dbg_tgt, vha, 0xf075,
3133             "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
3134             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3135             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
3136
3137         /*
3138          * Ignore sector if:
3139          * For type     3: ref & app tag is all 'f's
3140          * For type 0,1,2: app tag is all 'f's
3141          */
3142         if ((a_app_tag == 0xffff) &&
3143             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
3144              (a_ref_tag == 0xffffffff))) {
3145                 uint32_t blocks_done;
3146
3147                 /* 2TB boundary case covered automatically with this */
3148                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
3149                 cmd->se_cmd.bad_sector = e_ref_tag;
3150                 cmd->se_cmd.pi_err = 0;
3151                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
3152                         "need to return scsi good\n");
3153
3154                 /* Update protection tag */
3155                 if (cmd->prot_sg_cnt) {
3156                         uint32_t i, k = 0, num_ent;
3157                         struct scatterlist *sg, *sgl;
3158
3159
3160                         sgl = cmd->prot_sg;
3161
3162                         /* Patch the corresponding protection tags */
3163                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
3164                                 num_ent = sg_dma_len(sg) / 8;
3165                                 if (k + num_ent < blocks_done) {
3166                                         k += num_ent;
3167                                         continue;
3168                                 }
3169                                 k = blocks_done;
3170                                 break;
3171                         }
3172
3173                         if (k != blocks_done) {
3174                                 ql_log(ql_log_warn, vha, 0xf076,
3175                                     "unexpected tag values tag:lba=%u:%llu)\n",
3176                                     e_ref_tag, (unsigned long long)lba);
3177                                 goto out;
3178                         }
3179
3180 #if 0
3181                         struct sd_dif_tuple *spt;
3182                         /* TODO:
3183                          * This section came from initiator. Is it valid here?
3184                          * should ulp be override with actual val???
3185                          */
3186                         spt = page_address(sg_page(sg)) + sg->offset;
3187                         spt += j;
3188
3189                         spt->app_tag = 0xffff;
3190                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
3191                                 spt->ref_tag = 0xffffffff;
3192 #endif
3193                 }
3194
3195                 return 0;
3196         }
3197
3198         /* check guard */
3199         if (e_guard != a_guard) {
3200                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
3201                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3202
3203                 ql_log(ql_log_warn, vha, 0xe076,
3204                     "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3205                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3206                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3207                     a_guard, e_guard, cmd);
3208                 goto out;
3209         }
3210
3211         /* check ref tag */
3212         if (e_ref_tag != a_ref_tag) {
3213                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
3214                 cmd->se_cmd.bad_sector = e_ref_tag;
3215
3216                 ql_log(ql_log_warn, vha, 0xe077,
3217                         "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3218                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3219                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3220                         a_guard, e_guard, cmd);
3221                 goto out;
3222         }
3223
3224         /* check appl tag */
3225         if (e_app_tag != a_app_tag) {
3226                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
3227                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3228
3229                 ql_log(ql_log_warn, vha, 0xe078,
3230                         "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3231                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3232                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3233                         a_guard, e_guard, cmd);
3234                 goto out;
3235         }
3236 out:
3237         return 1;
3238 }
3239
3240
3241 /* If hardware_lock held on entry, might drop it, then reaquire */
3242 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3243 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3244         struct imm_ntfy_from_isp *ntfy)
3245 {
3246         struct nack_to_isp *nack;
3247         struct qla_hw_data *ha = vha->hw;
3248         request_t *pkt;
3249         int ret = 0;
3250
3251         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3252             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3253
3254         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3255         if (pkt == NULL) {
3256                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3257                     "qla_target(%d): %s failed: unable to allocate "
3258                     "request packet\n", vha->vp_idx, __func__);
3259                 return -ENOMEM;
3260         }
3261
3262         pkt->entry_type = NOTIFY_ACK_TYPE;
3263         pkt->entry_count = 1;
3264         pkt->handle = QLA_TGT_SKIP_HANDLE;
3265
3266         nack = (struct nack_to_isp *)pkt;
3267         nack->ox_id = ntfy->ox_id;
3268
3269         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3270         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3271                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3272                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3273         }
3274
3275         /* terminate */
3276         nack->u.isp24.flags |=
3277                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3278
3279         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3280         nack->u.isp24.status = ntfy->u.isp24.status;
3281         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3282         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3283         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3284         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3285         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3286         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3287
3288         qla2x00_start_iocbs(vha, vha->req);
3289         return ret;
3290 }
3291
3292 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3293         struct imm_ntfy_from_isp *imm, int ha_locked)
3294 {
3295         unsigned long flags = 0;
3296         int rc;
3297
3298         if (qlt_issue_marker(vha, ha_locked) < 0)
3299                 return;
3300
3301         if (ha_locked) {
3302                 rc = __qlt_send_term_imm_notif(vha, imm);
3303
3304 #if 0   /* Todo  */
3305                 if (rc == -ENOMEM)
3306                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3307 #else
3308                 if (rc) {
3309                 }
3310 #endif
3311                 goto done;
3312         }
3313
3314         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3315         rc = __qlt_send_term_imm_notif(vha, imm);
3316
3317 #if 0   /* Todo */
3318         if (rc == -ENOMEM)
3319                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3320 #endif
3321
3322 done:
3323         if (!ha_locked)
3324                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3325 }
3326
3327 /* If hardware_lock held on entry, might drop it, then reaquire */
3328 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3329 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
3330         struct qla_tgt_cmd *cmd,
3331         struct atio_from_isp *atio)
3332 {
3333         struct ctio7_to_24xx *ctio24;
3334         struct qla_hw_data *ha = vha->hw;
3335         request_t *pkt;
3336         int ret = 0;
3337         uint16_t temp;
3338
3339         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3340
3341         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3342         if (pkt == NULL) {
3343                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3344                     "qla_target(%d): %s failed: unable to allocate "
3345                     "request packet\n", vha->vp_idx, __func__);
3346                 return -ENOMEM;
3347         }
3348
3349         if (cmd != NULL) {
3350                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3351                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3352                             "qla_target(%d): Terminating cmd %p with "
3353                             "incorrect state %d\n", vha->vp_idx, cmd,
3354                             cmd->state);
3355                 } else
3356                         ret = 1;
3357         }
3358
3359         vha->tgt_counters.num_term_xchg_sent++;
3360         pkt->entry_count = 1;
3361         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3362
3363         ctio24 = (struct ctio7_to_24xx *)pkt;
3364         ctio24->entry_type = CTIO_TYPE7;
3365         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3366         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3367         ctio24->vp_index = vha->vp_idx;
3368         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3369         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3370         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3371         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3372         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3373             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
3374                 CTIO7_FLAGS_TERMINATE);
3375         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3376         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3377
3378         /* Most likely, it isn't needed */
3379         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3380             &atio->u.isp24.fcp_cmnd.add_cdb[
3381             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3382         if (ctio24->u.status1.residual != 0)
3383                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3384
3385         /* Memory Barrier */
3386         wmb();
3387         qla2x00_start_iocbs(vha, vha->req);
3388         return ret;
3389 }
3390
3391 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3392         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3393         int ul_abort)
3394 {
3395         unsigned long flags = 0;
3396         int rc;
3397
3398         if (qlt_issue_marker(vha, ha_locked) < 0)
3399                 return;
3400
3401         if (ha_locked) {
3402                 rc = __qlt_send_term_exchange(vha, cmd, atio);
3403                 if (rc == -ENOMEM)
3404                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3405                 goto done;
3406         }
3407         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3408         rc = __qlt_send_term_exchange(vha, cmd, atio);
3409         if (rc == -ENOMEM)
3410                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3411
3412 done:
3413         if (cmd && !ul_abort && !cmd->aborted) {
3414                 if (cmd->sg_mapped)
3415                         qlt_unmap_sg(vha, cmd);
3416                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3417         }
3418
3419         if (!ha_locked)
3420                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3421
3422         return;
3423 }
3424
3425 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3426 {
3427         struct list_head free_list;
3428         struct qla_tgt_cmd *cmd, *tcmd;
3429
3430         vha->hw->tgt.leak_exchg_thresh_hold =
3431             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3432
3433         cmd = tcmd = NULL;
3434         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3435                 INIT_LIST_HEAD(&free_list);
3436                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3437
3438                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3439                         list_del(&cmd->cmd_list);
3440                         /* This cmd was never sent to TCM.  There is no need
3441                          * to schedule free or call free_cmd
3442                          */
3443                         qlt_free_cmd(cmd);
3444                         vha->hw->tgt.num_qfull_cmds_alloc--;
3445                 }
3446         }
3447         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3448 }
3449
3450 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3451 {
3452         uint32_t total_leaked;
3453
3454         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3455
3456         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3457             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3458
3459                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3460                     "Chip reset due to exchange starvation: %d/%d.\n",
3461                     total_leaked, vha->hw->cur_fw_xcb_count);
3462
3463                 if (IS_P3P_TYPE(vha->hw))
3464                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3465                 else
3466                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3467                 qla2xxx_wake_dpc(vha);
3468         }
3469
3470 }
3471
3472 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3473 {
3474         struct qla_tgt *tgt = cmd->tgt;
3475         struct scsi_qla_host *vha = tgt->vha;
3476         struct se_cmd *se_cmd = &cmd->se_cmd;
3477         unsigned long flags;
3478
3479         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3480             "qla_target(%d): terminating exchange for aborted cmd=%p "
3481             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3482             se_cmd->tag);
3483
3484         spin_lock_irqsave(&cmd->cmd_lock, flags);
3485         if (cmd->aborted) {
3486                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3487                 /*
3488                  * It's normal to see 2 calls in this path:
3489                  *  1) XFER Rdy completion + CMD_T_ABORT
3490                  *  2) TCM TMR - drain_state_list
3491                  */
3492                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
3493                         "multiple abort. %p transport_state %x, t_state %x,"
3494                         " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state,
3495                         cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags);
3496                 return EIO;
3497         }
3498         cmd->aborted = 1;
3499         cmd->trc_flags |= TRC_ABORT;
3500         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3501
3502         qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1);
3503         return 0;
3504 }
3505 EXPORT_SYMBOL(qlt_abort_cmd);
3506
3507 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3508 {
3509         struct fc_port *sess = cmd->sess;
3510
3511         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3512             "%s: se_cmd[%p] ox_id %04x\n",
3513             __func__, &cmd->se_cmd,
3514             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3515
3516         BUG_ON(cmd->cmd_in_wq);
3517
3518         if (cmd->sg_mapped)
3519                 qlt_unmap_sg(cmd->vha, cmd);
3520
3521         if (!cmd->q_full)
3522                 qlt_decr_num_pend_cmds(cmd->vha);
3523
3524         BUG_ON(cmd->sg_mapped);
3525         cmd->jiffies_at_free = get_jiffies_64();
3526         if (unlikely(cmd->free_sg))
3527                 kfree(cmd->sg);
3528
3529         if (!sess || !sess->se_sess) {
3530                 WARN_ON(1);
3531                 return;
3532         }
3533         cmd->jiffies_at_free = get_jiffies_64();
3534         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3535 }
3536 EXPORT_SYMBOL(qlt_free_cmd);
3537
3538 /*
3539  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3540  */
3541 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3542         struct qla_tgt_cmd *cmd, uint32_t status)
3543 {
3544         int term = 0;
3545
3546         if (ctio != NULL) {
3547                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3548                 term = !(c->flags &
3549                     cpu_to_le16(OF_TERM_EXCH));
3550         } else
3551                 term = 1;
3552
3553         if (term)
3554                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3555
3556         return term;
3557 }
3558
3559 /* ha->hardware_lock supposed to be held on entry */
3560 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3561         uint32_t handle)
3562 {
3563         struct qla_hw_data *ha = vha->hw;
3564
3565         handle--;
3566         if (ha->tgt.cmds[handle] != NULL) {
3567                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3568                 ha->tgt.cmds[handle] = NULL;
3569                 return cmd;
3570         } else
3571                 return NULL;
3572 }
3573
3574 /* ha->hardware_lock supposed to be held on entry */
3575 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3576         uint32_t handle, void *ctio)
3577 {
3578         struct qla_tgt_cmd *cmd = NULL;
3579
3580         /* Clear out internal marks */
3581         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3582             CTIO_INTERMEDIATE_HANDLE_MARK);
3583
3584         if (handle != QLA_TGT_NULL_HANDLE) {
3585                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3586                         return NULL;
3587
3588                 /* handle-1 is actually used */
3589                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3590                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3591                             "qla_target(%d): Wrong handle %x received\n",
3592                             vha->vp_idx, handle);
3593                         return NULL;
3594                 }
3595                 cmd = qlt_get_cmd(vha, handle);
3596                 if (unlikely(cmd == NULL)) {
3597                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
3598                             "qla_target(%d): Suspicious: unable to "
3599                             "find the command with handle %x\n", vha->vp_idx,
3600                             handle);
3601                         return NULL;
3602                 }
3603         } else if (ctio != NULL) {
3604                 /* We can't get loop ID from CTIO7 */
3605                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3606                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3607                     "support NULL handles\n", vha->vp_idx);
3608                 return NULL;
3609         }
3610
3611         return cmd;
3612 }
3613
3614 /* hardware_lock should be held by caller. */
3615 static void
3616 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3617 {
3618         struct qla_hw_data *ha = vha->hw;
3619         uint32_t handle;
3620
3621         if (cmd->sg_mapped)
3622                 qlt_unmap_sg(vha, cmd);
3623
3624         handle = qlt_make_handle(vha);
3625
3626         /* TODO: fix debug message type and ids. */
3627         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3628                 ql_dbg(ql_dbg_io, vha, 0xff00,
3629                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3630         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3631                 cmd->write_data_transferred = 0;
3632                 cmd->state = QLA_TGT_STATE_DATA_IN;
3633
3634                 ql_dbg(ql_dbg_io, vha, 0xff01,
3635                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3636
3637                 ha->tgt.tgt_ops->handle_data(cmd);
3638                 return;
3639         } else {
3640                 ql_dbg(ql_dbg_io, vha, 0xff03,
3641                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3642                     cmd->state);
3643                 dump_stack();
3644         }
3645
3646         cmd->trc_flags |= TRC_FLUSH;
3647         ha->tgt.tgt_ops->free_cmd(cmd);
3648 }
3649
3650 void
3651 qlt_host_reset_handler(struct qla_hw_data *ha)
3652 {
3653         struct qla_tgt_cmd *cmd;
3654         unsigned long flags;
3655         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3656         scsi_qla_host_t *vha = NULL;
3657         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3658         uint32_t i;
3659
3660         if (!base_vha->hw->tgt.tgt_ops)
3661                 return;
3662
3663         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3664                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3665                         "Target mode disabled\n");
3666                 return;
3667         }
3668
3669         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3670             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3671             base_vha->dpc_flags);
3672
3673         spin_lock_irqsave(&ha->hardware_lock, flags);
3674         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3675                 cmd = qlt_get_cmd(base_vha, i);
3676                 if (!cmd)
3677                         continue;
3678                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3679                 vha = cmd->vha;
3680                 qlt_abort_cmd_on_host_reset(vha, cmd);
3681         }
3682         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3683 }
3684
3685
3686 /*
3687  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3688  */
3689 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3690         uint32_t status, void *ctio)
3691 {
3692         struct qla_hw_data *ha = vha->hw;
3693         struct se_cmd *se_cmd;
3694         struct qla_tgt_cmd *cmd;
3695
3696         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3697                 /* That could happen only in case of an error/reset/abort */
3698                 if (status != CTIO_SUCCESS) {
3699                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3700                             "Intermediate CTIO received"
3701                             " (status %x)\n", status);
3702                 }
3703                 return;
3704         }
3705
3706         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3707         if (cmd == NULL)
3708                 return;
3709
3710         se_cmd = &cmd->se_cmd;
3711         cmd->cmd_sent_to_fw = 0;
3712
3713         qlt_unmap_sg(vha, cmd);
3714
3715         if (unlikely(status != CTIO_SUCCESS)) {
3716                 switch (status & 0xFFFF) {
3717                 case CTIO_LIP_RESET:
3718                 case CTIO_TARGET_RESET:
3719                 case CTIO_ABORTED:
3720                         /* driver request abort via Terminate exchange */
3721                 case CTIO_TIMEOUT:
3722                 case CTIO_INVALID_RX_ID:
3723                         /* They are OK */
3724                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3725                             "qla_target(%d): CTIO with "
3726                             "status %#x received, state %x, se_cmd %p, "
3727                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3728                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3729                             status, cmd->state, se_cmd);
3730                         break;
3731
3732                 case CTIO_PORT_LOGGED_OUT:
3733                 case CTIO_PORT_UNAVAILABLE:
3734                 {
3735                         int logged_out =
3736                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3737
3738                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3739                             "qla_target(%d): CTIO with %s status %x "
3740                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3741                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3742                             status, cmd->state, se_cmd);
3743
3744                         if (logged_out && cmd->sess) {
3745                                 /*
3746                                  * Session is already logged out, but we need
3747                                  * to notify initiator, who's not aware of this
3748                                  */
3749                                 cmd->sess->logout_on_delete = 0;
3750                                 cmd->sess->send_els_logo = 1;
3751                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
3752                                     "%s %d %8phC post del sess\n",
3753                                     __func__, __LINE__, cmd->sess->port_name);
3754
3755                                 qlt_schedule_sess_for_deletion_lock(cmd->sess);
3756                         }
3757                         break;
3758                 }
3759                 case CTIO_DIF_ERROR: {
3760                         struct ctio_crc_from_fw *crc =
3761                                 (struct ctio_crc_from_fw *)ctio;
3762                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3763                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3764                             vha->vp_idx, status, cmd->state, se_cmd,
3765                             *((u64 *)&crc->actual_dif[0]),
3766                             *((u64 *)&crc->expected_dif[0]));
3767
3768                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3769                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3770                                         /* scsi Write/xfer rdy complete */
3771                                         goto skip_term;
3772                                 } else {
3773                                         /* scsi read/xmit respond complete
3774                                          * call handle dif to send scsi status
3775                                          * rather than terminate exchange.
3776                                          */
3777                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3778                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3779                                         return;
3780                                 }
3781                         } else {
3782                                 /* Need to generate a SCSI good completion.
3783                                  * because FW did not send scsi status.
3784                                  */
3785                                 status = 0;
3786                                 goto skip_term;
3787                         }
3788                         break;
3789                 }
3790                 default:
3791                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3792                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3793                             vha->vp_idx, status, cmd->state, se_cmd);
3794                         break;
3795                 }
3796
3797
3798                 /* "cmd->aborted" means
3799                  * cmd is already aborted/terminated, we don't
3800                  * need to terminate again.  The exchange is already
3801                  * cleaned up/freed at FW level.  Just cleanup at driver
3802                  * level.
3803                  */
3804                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3805                     (!cmd->aborted)) {
3806                         cmd->trc_flags |= TRC_CTIO_ERR;
3807                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3808                                 return;
3809                 }
3810         }
3811 skip_term:
3812
3813         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3814                 cmd->trc_flags |= TRC_CTIO_DONE;
3815         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3816                 cmd->state = QLA_TGT_STATE_DATA_IN;
3817
3818                 if (status == CTIO_SUCCESS)
3819                         cmd->write_data_transferred = 1;
3820
3821                 ha->tgt.tgt_ops->handle_data(cmd);
3822                 return;
3823         } else if (cmd->aborted) {
3824                 cmd->trc_flags |= TRC_CTIO_ABORTED;
3825                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3826                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3827         } else {
3828                 cmd->trc_flags |= TRC_CTIO_STRANGE;
3829                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3830                     "qla_target(%d): A command in state (%d) should "
3831                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3832         }
3833
3834         if (unlikely(status != CTIO_SUCCESS) &&
3835                 !cmd->aborted) {
3836                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3837                 dump_stack();
3838         }
3839
3840         ha->tgt.tgt_ops->free_cmd(cmd);
3841 }
3842
3843 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3844         uint8_t task_codes)
3845 {
3846         int fcp_task_attr;
3847
3848         switch (task_codes) {
3849         case ATIO_SIMPLE_QUEUE:
3850                 fcp_task_attr = TCM_SIMPLE_TAG;
3851                 break;
3852         case ATIO_HEAD_OF_QUEUE:
3853                 fcp_task_attr = TCM_HEAD_TAG;
3854                 break;
3855         case ATIO_ORDERED_QUEUE:
3856                 fcp_task_attr = TCM_ORDERED_TAG;
3857                 break;
3858         case ATIO_ACA_QUEUE:
3859                 fcp_task_attr = TCM_ACA_TAG;
3860                 break;
3861         case ATIO_UNTAGGED:
3862                 fcp_task_attr = TCM_SIMPLE_TAG;
3863                 break;
3864         default:
3865                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3866                     "qla_target: unknown task code %x, use ORDERED instead\n",
3867                     task_codes);
3868                 fcp_task_attr = TCM_ORDERED_TAG;
3869                 break;
3870         }
3871
3872         return fcp_task_attr;
3873 }
3874
3875 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
3876                                         uint8_t *);
3877 /*
3878  * Process context for I/O path into tcm_qla2xxx code
3879  */
3880 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3881 {
3882         scsi_qla_host_t *vha = cmd->vha;
3883         struct qla_hw_data *ha = vha->hw;
3884         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3885         struct fc_port *sess = cmd->sess;
3886         struct atio_from_isp *atio = &cmd->atio;
3887         unsigned char *cdb;
3888         unsigned long flags;
3889         uint32_t data_length;
3890         int ret, fcp_task_attr, data_dir, bidi = 0;
3891
3892         cmd->cmd_in_wq = 0;
3893         cmd->trc_flags |= TRC_DO_WORK;
3894         if (tgt->tgt_stop)
3895                 goto out_term;
3896
3897         if (cmd->aborted) {
3898                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3899                     "cmd with tag %u is aborted\n",
3900                     cmd->atio.u.isp24.exchange_addr);
3901                 goto out_term;
3902         }
3903
3904         spin_lock_init(&cmd->cmd_lock);
3905         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3906         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3907         cmd->unpacked_lun = scsilun_to_int(
3908             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3909
3910         if (atio->u.isp24.fcp_cmnd.rddata &&
3911             atio->u.isp24.fcp_cmnd.wrdata) {
3912                 bidi = 1;
3913                 data_dir = DMA_TO_DEVICE;
3914         } else if (atio->u.isp24.fcp_cmnd.rddata)
3915                 data_dir = DMA_FROM_DEVICE;
3916         else if (atio->u.isp24.fcp_cmnd.wrdata)
3917                 data_dir = DMA_TO_DEVICE;
3918         else
3919                 data_dir = DMA_NONE;
3920
3921         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3922             atio->u.isp24.fcp_cmnd.task_attr);
3923         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3924             &atio->u.isp24.fcp_cmnd.add_cdb[
3925             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3926
3927         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3928                                           fcp_task_attr, data_dir, bidi);
3929         if (ret != 0)
3930                 goto out_term;
3931         /*
3932          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3933          */
3934         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3935         ha->tgt.tgt_ops->put_sess(sess);
3936         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3937         return;
3938
3939 out_term:
3940         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3941         /*
3942          * cmd has not sent to target yet, so pass NULL as the second
3943          * argument to qlt_send_term_exchange() and free the memory here.
3944          */
3945         cmd->trc_flags |= TRC_DO_WORK_ERR;
3946         spin_lock_irqsave(&ha->hardware_lock, flags);
3947         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0);
3948
3949         qlt_decr_num_pend_cmds(vha);
3950         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3951         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3952
3953         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3954         ha->tgt.tgt_ops->put_sess(sess);
3955         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3956 }
3957
3958 static void qlt_do_work(struct work_struct *work)
3959 {
3960         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3961         scsi_qla_host_t *vha = cmd->vha;
3962         unsigned long flags;
3963
3964         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3965         list_del(&cmd->cmd_list);
3966         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3967
3968         __qlt_do_work(cmd);
3969 }
3970
3971 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3972                                        struct fc_port *sess,
3973                                        struct atio_from_isp *atio)
3974 {
3975         struct se_session *se_sess = sess->se_sess;
3976         struct qla_tgt_cmd *cmd;
3977         int tag;
3978
3979         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3980         if (tag < 0)
3981                 return NULL;
3982
3983         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3984         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3985
3986         memcpy(&cmd->atio, atio, sizeof(*atio));
3987         cmd->state = QLA_TGT_STATE_NEW;
3988         cmd->tgt = vha->vha_tgt.qla_tgt;
3989         qlt_incr_num_pend_cmds(vha);
3990         cmd->vha = vha;
3991         cmd->se_cmd.map_tag = tag;
3992         cmd->sess = sess;
3993         cmd->loop_id = sess->loop_id;
3994         cmd->conf_compl_supported = sess->conf_compl_supported;
3995
3996         cmd->trc_flags = 0;
3997         cmd->jiffies_at_alloc = get_jiffies_64();
3998
3999         cmd->reset_count = vha->hw->chip_reset;
4000
4001         return cmd;
4002 }
4003
4004 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
4005                           uint16_t);
4006
4007 static void qlt_create_sess_from_atio(struct work_struct *work)
4008 {
4009         struct qla_tgt_sess_op *op = container_of(work,
4010                                         struct qla_tgt_sess_op, work);
4011         scsi_qla_host_t *vha = op->vha;
4012         struct qla_hw_data *ha = vha->hw;
4013         struct fc_port *sess;
4014         struct qla_tgt_cmd *cmd;
4015         unsigned long flags;
4016         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
4017
4018         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4019         list_del(&op->cmd_list);
4020         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4021
4022         if (op->aborted) {
4023                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
4024                     "sess_op with tag %u is aborted\n",
4025                     op->atio.u.isp24.exchange_addr);
4026                 goto out_term;
4027         }
4028
4029         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
4030             "qla_target(%d): Unable to find wwn login"
4031             " (s_id %x:%x:%x), trying to create it manually\n",
4032             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
4033
4034         if (op->atio.u.raw.entry_count > 1) {
4035                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
4036                     "Dropping multy entry atio %p\n", &op->atio);
4037                 goto out_term;
4038         }
4039
4040         sess = qlt_make_local_sess(vha, s_id);
4041         /* sess has an extra creation ref. */
4042
4043         if (!sess)
4044                 goto out_term;
4045         /*
4046          * Now obtain a pre-allocated session tag using the original op->atio
4047          * packet header, and dispatch into __qlt_do_work() using the existing
4048          * process context.
4049          */
4050         cmd = qlt_get_tag(vha, sess, &op->atio);
4051         if (!cmd) {
4052                 spin_lock_irqsave(&ha->hardware_lock, flags);
4053                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
4054                 ha->tgt.tgt_ops->put_sess(sess);
4055                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4056                 kfree(op);
4057                 return;
4058         }
4059
4060         /*
4061          * __qlt_do_work() will call qlt_put_sess() to release
4062          * the extra reference taken above by qlt_make_local_sess()
4063          */
4064         __qlt_do_work(cmd);
4065         kfree(op);
4066         return;
4067 out_term:
4068         spin_lock_irqsave(&ha->hardware_lock, flags);
4069         qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0);
4070         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4071         kfree(op);
4072 }
4073
4074 /* ha->hardware_lock supposed to be held on entry */
4075 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4076         struct atio_from_isp *atio)
4077 {
4078         struct qla_hw_data *ha = vha->hw;
4079         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4080         struct fc_port *sess;
4081         struct qla_tgt_cmd *cmd;
4082         unsigned long flags;
4083
4084         if (unlikely(tgt->tgt_stop)) {
4085                 ql_dbg(ql_dbg_io, vha, 0x3061,
4086                     "New command while device %p is shutting down\n", tgt);
4087                 return -EFAULT;
4088         }
4089
4090         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4091         if (unlikely(!sess)) {
4092                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
4093                                                      GFP_ATOMIC);
4094                 if (!op)
4095                         return -ENOMEM;
4096
4097                 memcpy(&op->atio, atio, sizeof(*atio));
4098                 op->vha = vha;
4099
4100                 spin_lock(&vha->cmd_list_lock);
4101                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
4102                 spin_unlock(&vha->cmd_list_lock);
4103
4104                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
4105                 queue_work(qla_tgt_wq, &op->work);
4106                 return 0;
4107         }
4108
4109         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4110          * session deletion, but it's still in sess_del_work wq */
4111         if (sess->deleted) {
4112                 ql_dbg(ql_dbg_io, vha, 0x3061,
4113                     "New command while old session %p is being deleted\n",
4114                     sess);
4115                 return -EFAULT;
4116         }
4117
4118         /*
4119          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4120          */
4121         if (!kref_get_unless_zero(&sess->sess_kref)) {
4122                 ql_dbg(ql_dbg_tgt, vha, 0xffff,
4123                     "%s: kref_get fail, %8phC oxid %x \n",
4124                     __func__, sess->port_name,
4125                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4126                 return -EFAULT;
4127         }
4128
4129         cmd = qlt_get_tag(vha, sess, atio);
4130         if (!cmd) {
4131                 ql_dbg(ql_dbg_io, vha, 0x3062,
4132                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4133                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4134                 ha->tgt.tgt_ops->put_sess(sess);
4135                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4136                 return -ENOMEM;
4137         }
4138
4139         cmd->cmd_in_wq = 1;
4140         cmd->trc_flags |= TRC_NEW_CMD;
4141         cmd->se_cmd.cpuid = ha->msix_count ?
4142                 ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND;
4143
4144         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4145         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4146         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4147
4148         INIT_WORK(&cmd->work, qlt_do_work);
4149         if (ha->msix_count) {
4150                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4151                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4152                             &cmd->work);
4153                 else
4154                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4155                             &cmd->work);
4156         } else {
4157                 queue_work(qla_tgt_wq, &cmd->work);
4158         }
4159         return 0;
4160
4161 }
4162
4163 /* ha->hardware_lock supposed to be held on entry */
4164 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4165         int fn, void *iocb, int flags)
4166 {
4167         struct scsi_qla_host *vha = sess->vha;
4168         struct qla_hw_data *ha = vha->hw;
4169         struct qla_tgt_mgmt_cmd *mcmd;
4170         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4171         int res;
4172
4173         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4174         if (!mcmd) {
4175                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4176                     "qla_target(%d): Allocation of management "
4177                     "command failed, some commands and their data could "
4178                     "leak\n", vha->vp_idx);
4179                 return -ENOMEM;
4180         }
4181         memset(mcmd, 0, sizeof(*mcmd));
4182         mcmd->sess = sess;
4183
4184         if (iocb) {
4185                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4186                     sizeof(mcmd->orig_iocb.imm_ntfy));
4187         }
4188         mcmd->tmr_func = fn;
4189         mcmd->flags = flags;
4190         mcmd->reset_count = vha->hw->chip_reset;
4191
4192         switch (fn) {
4193         case QLA_TGT_LUN_RESET:
4194             abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4195             break;
4196         }
4197
4198         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func, 0);
4199         if (res != 0) {
4200                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4201                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4202                     sess->vha->vp_idx, res);
4203                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4204                 return -EFAULT;
4205         }
4206
4207         return 0;
4208 }
4209
4210 /* ha->hardware_lock supposed to be held on entry */
4211 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4212 {
4213         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4214         struct qla_hw_data *ha = vha->hw;
4215         struct qla_tgt *tgt;
4216         struct fc_port *sess;
4217         uint32_t lun, unpacked_lun;
4218         int fn;
4219         unsigned long flags;
4220
4221         tgt = vha->vha_tgt.qla_tgt;
4222
4223         lun = a->u.isp24.fcp_cmnd.lun;
4224         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4225
4226         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4227         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4228             a->u.isp24.fcp_hdr.s_id);
4229         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4230
4231         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4232
4233         if (!sess) {
4234                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4235                     "qla_target(%d): task mgmt fn 0x%x for "
4236                     "non-existant session\n", vha->vp_idx, fn);
4237                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4238                     sizeof(struct atio_from_isp));
4239         }
4240
4241         if (sess->deleted)
4242                 return -EFAULT;
4243
4244         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4245 }
4246
4247 /* ha->hardware_lock supposed to be held on entry */
4248 static int __qlt_abort_task(struct scsi_qla_host *vha,
4249         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4250 {
4251         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4252         struct qla_hw_data *ha = vha->hw;
4253         struct qla_tgt_mgmt_cmd *mcmd;
4254         uint32_t lun, unpacked_lun;
4255         int rc;
4256
4257         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4258         if (mcmd == NULL) {
4259                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4260                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4261                     vha->vp_idx, __func__);
4262                 return -ENOMEM;
4263         }
4264         memset(mcmd, 0, sizeof(*mcmd));
4265
4266         mcmd->sess = sess;
4267         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4268             sizeof(mcmd->orig_iocb.imm_ntfy));
4269
4270         lun = a->u.isp24.fcp_cmnd.lun;
4271         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4272         mcmd->reset_count = vha->hw->chip_reset;
4273         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4274
4275         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4276             le16_to_cpu(iocb->u.isp2x.seq_id));
4277         if (rc != 0) {
4278                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4279                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4280                     vha->vp_idx, rc);
4281                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4282                 return -EFAULT;
4283         }
4284
4285         return 0;
4286 }
4287
4288 /* ha->hardware_lock supposed to be held on entry */
4289 static int qlt_abort_task(struct scsi_qla_host *vha,
4290         struct imm_ntfy_from_isp *iocb)
4291 {
4292         struct qla_hw_data *ha = vha->hw;
4293         struct fc_port *sess;
4294         int loop_id;
4295         unsigned long flags;
4296
4297         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4298
4299         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4300         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4301         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4302
4303         if (sess == NULL) {
4304                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4305                     "qla_target(%d): task abort for unexisting "
4306                     "session\n", vha->vp_idx);
4307                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4308                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4309         }
4310
4311         return __qlt_abort_task(vha, iocb, sess);
4312 }
4313
4314 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4315 {
4316         if (rc != MBS_COMMAND_COMPLETE) {
4317                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4318                         "%s: se_sess %p / sess %p from"
4319                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4320                         " LOGO failed: %#x\n",
4321                         __func__,
4322                         fcport->se_sess,
4323                         fcport,
4324                         fcport->port_name, fcport->loop_id,
4325                         fcport->d_id.b.domain, fcport->d_id.b.area,
4326                         fcport->d_id.b.al_pa, rc);
4327         }
4328
4329         fcport->logout_completed = 1;
4330 }
4331
4332 /*
4333 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4334 *
4335 * Schedules sessions with matching port_id/loop_id but different wwn for
4336 * deletion. Returns existing session with matching wwn if present.
4337 * Null otherwise.
4338 */
4339 struct fc_port *
4340 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4341     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4342 {
4343         struct fc_port *sess = NULL, *other_sess;
4344         uint64_t other_wwn;
4345
4346         *conflict_sess = NULL;
4347
4348         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4349
4350                 other_wwn = wwn_to_u64(other_sess->port_name);
4351
4352                 if (wwn == other_wwn) {
4353                         WARN_ON(sess);
4354                         sess = other_sess;
4355                         continue;
4356                 }
4357
4358                 /* find other sess with nport_id collision */
4359                 if (port_id.b24 == other_sess->d_id.b24) {
4360                         if (loop_id != other_sess->loop_id) {
4361                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4362                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4363                                     other_sess, other_sess->loop_id, other_wwn);
4364
4365                                 /*
4366                                  * logout_on_delete is set by default, but another
4367                                  * session that has the same s_id/loop_id combo
4368                                  * might have cleared it when requested this session
4369                                  * deletion, so don't touch it
4370                                  */
4371                                 qlt_schedule_sess_for_deletion(other_sess, true);
4372                         } else {
4373                                 /*
4374                                  * Another wwn used to have our s_id/loop_id
4375                                  * kill the session, but don't free the loop_id
4376                                  */
4377                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
4378                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4379                                     other_sess, other_sess->loop_id, other_wwn);
4380
4381
4382                                 other_sess->keep_nport_handle = 1;
4383                                 *conflict_sess = other_sess;
4384                                 qlt_schedule_sess_for_deletion(other_sess,
4385                                     true);
4386                         }
4387                         continue;
4388                 }
4389
4390                 /* find other sess with nport handle collision */
4391                 if ((loop_id == other_sess->loop_id) &&
4392                         (loop_id != FC_NO_LOOP_ID)) {
4393                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4394                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4395                                other_sess, other_sess->loop_id, other_wwn);
4396
4397                         /* Same loop_id but different s_id
4398                          * Ok to kill and logout */
4399                         qlt_schedule_sess_for_deletion(other_sess, true);
4400                 }
4401         }
4402
4403         return sess;
4404 }
4405
4406 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4407 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4408 {
4409         struct qla_tgt_sess_op *op;
4410         struct qla_tgt_cmd *cmd;
4411         uint32_t key;
4412         int count = 0;
4413
4414         key = (((u32)s_id->b.domain << 16) |
4415                ((u32)s_id->b.area   <<  8) |
4416                ((u32)s_id->b.al_pa));
4417
4418         spin_lock(&vha->cmd_list_lock);
4419         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4420                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4421
4422                 if (op_key == key) {
4423                         op->aborted = true;
4424                         count++;
4425                 }
4426         }
4427
4428         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4429                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4430                 if (op_key == key) {
4431                         op->aborted = true;
4432                         count++;
4433                 }
4434         }
4435
4436         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4437                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4438                 if (cmd_key == key) {
4439                         cmd->aborted = 1;
4440                         count++;
4441                 }
4442         }
4443         spin_unlock(&vha->cmd_list_lock);
4444
4445         return count;
4446 }
4447
4448 /*
4449  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4450  */
4451 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4452         struct imm_ntfy_from_isp *iocb)
4453 {
4454         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4455         struct qla_hw_data *ha = vha->hw;
4456         struct fc_port *sess = NULL, *conflict_sess = NULL;
4457         uint64_t wwn;
4458         port_id_t port_id;
4459         uint16_t loop_id;
4460         uint16_t wd3_lo;
4461         int res = 0;
4462         struct qlt_plogi_ack_t *pla;
4463         unsigned long flags;
4464
4465         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4466
4467         port_id.b.domain = iocb->u.isp24.port_id[2];
4468         port_id.b.area   = iocb->u.isp24.port_id[1];
4469         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4470         port_id.b.rsvd_1 = 0;
4471
4472         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4473
4474         ql_dbg(ql_dbg_disc, vha, 0xf026,
4475             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4476             vha->vp_idx, iocb->u.isp24.port_id[2],
4477                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4478                    iocb->u.isp24.status_subcode, loop_id,
4479                 iocb->u.isp24.port_name);
4480
4481         /* res = 1 means ack at the end of thread
4482          * res = 0 means ack async/later.
4483          */
4484         switch (iocb->u.isp24.status_subcode) {
4485         case ELS_PLOGI:
4486
4487                 /* Mark all stale commands in qla_tgt_wq for deletion */
4488                 abort_cmds_for_s_id(vha, &port_id);
4489
4490                 if (wwn) {
4491                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4492                         sess = qlt_find_sess_invalidate_other(vha, wwn,
4493                                 port_id, loop_id, &conflict_sess);
4494                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4495                 }
4496
4497                 if (IS_SW_RESV_ADDR(port_id)) {
4498                         res = 1;
4499                         break;
4500                 }
4501
4502                 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4503                 if (!pla) {
4504                         qlt_send_term_imm_notif(vha, iocb, 1);
4505                         break;
4506                 }
4507
4508                 res = 0;
4509
4510                 if (conflict_sess) {
4511                         conflict_sess->login_gen++;
4512                         qlt_plogi_ack_link(vha, pla, conflict_sess,
4513                                 QLT_PLOGI_LINK_CONFLICT);
4514                 }
4515
4516                 if (!sess) {
4517                         pla->ref_count++;
4518                         qla24xx_post_newsess_work(vha, &port_id,
4519                                 iocb->u.isp24.port_name, pla);
4520                         res = 0;
4521                         break;
4522                 }
4523
4524                 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4525                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4526                 sess->d_id = port_id;
4527                 sess->login_gen++;
4528
4529                 switch (sess->disc_state) {
4530                 case DSC_DELETED:
4531                         qlt_plogi_ack_unref(vha, pla);
4532                         break;
4533
4534                 default:
4535                         /*
4536                          * Under normal circumstances we want to release nport handle
4537                          * during LOGO process to avoid nport handle leaks inside FW.
4538                          * The exception is when LOGO is done while another PLOGI with
4539                          * the same nport handle is waiting as might be the case here.
4540                          * Note: there is always a possibily of a race where session
4541                          * deletion has already started for other reasons (e.g. ACL
4542                          * removal) and now PLOGI arrives:
4543                          * 1. if PLOGI arrived in FW after nport handle has been freed,
4544                          *    FW must have assigned this PLOGI a new/same handle and we
4545                          *    can proceed ACK'ing it as usual when session deletion
4546                          *    completes.
4547                          * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4548                          *    bit reached it, the handle has now been released. We'll
4549                          *    get an error when we ACK this PLOGI. Nothing will be sent
4550                          *    back to initiator. Initiator should eventually retry
4551                          *    PLOGI and situation will correct itself.
4552                          */
4553                         sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4554                            (sess->d_id.b24 == port_id.b24));
4555
4556                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4557                                    "%s %d %8phC post del sess\n",
4558                                    __func__, __LINE__, sess->port_name);
4559
4560
4561                         qlt_schedule_sess_for_deletion_lock(sess);
4562                         break;
4563                 }
4564
4565                 break;
4566
4567         case ELS_PRLI:
4568                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4569
4570                 if (wwn) {
4571                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4572                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4573                                 loop_id, &conflict_sess);
4574                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4575                 }
4576
4577                 if (conflict_sess) {
4578                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4579                             "PRLI with conflicting sess %p port %8phC\n",
4580                             conflict_sess, conflict_sess->port_name);
4581                         qlt_send_term_imm_notif(vha, iocb, 1);
4582                         res = 0;
4583                         break;
4584                 }
4585
4586                 if (sess != NULL) {
4587                         if (sess->fw_login_state == DSC_LS_PLOGI_PEND) {
4588                                 /*
4589                                  * Impatient initiator sent PRLI before last
4590                                  * PLOGI could finish. Will force him to re-try,
4591                                  * while last one finishes.
4592                                  */
4593                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4594                                     "sess %p PRLI received, before plogi ack.\n",
4595                                     sess);
4596                                 qlt_send_term_imm_notif(vha, iocb, 1);
4597                                 res = 0;
4598                                 break;
4599                         }
4600
4601                         /*
4602                          * This shouldn't happen under normal circumstances,
4603                          * since we have deleted the old session during PLOGI
4604                          */
4605                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4606                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4607                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4608
4609                         sess->local = 0;
4610                         sess->loop_id = loop_id;
4611                         sess->d_id = port_id;
4612                         sess->fw_login_state = DSC_LS_PRLI_PEND;
4613
4614                         if (wd3_lo & BIT_7)
4615                                 sess->conf_compl_supported = 1;
4616
4617                         if ((wd3_lo & BIT_4) == 0)
4618                                 sess->port_type = FCT_INITIATOR;
4619                         else
4620                                 sess->port_type = FCT_TARGET;
4621                 }
4622                 res = 1; /* send notify ack */
4623
4624                 /* Make session global (not used in fabric mode) */
4625                 if (ha->current_topology != ISP_CFG_F) {
4626                         set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4627                         set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4628                         qla2xxx_wake_dpc(vha);
4629                 } else {
4630                         if (sess) {
4631                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4632                                            "%s %d %8phC post nack\n",
4633                                            __func__, __LINE__, sess->port_name);
4634
4635                                 qla24xx_post_nack_work(vha, sess, iocb,
4636                                         SRB_NACK_PRLI);
4637                                 res = 0;
4638                         }
4639                 }
4640                 break;
4641
4642
4643         case ELS_TPRLO:
4644                 if (le16_to_cpu(iocb->u.isp24.flags) &
4645                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
4646                         loop_id = 0xFFFF;
4647                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
4648                         res = 1;
4649                         break;
4650                 }
4651                 /* drop through */
4652         case ELS_LOGO:
4653         case ELS_PRLO:
4654                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4655                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
4656                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4657
4658                 if (sess) {
4659                         sess->login_gen++;
4660                         sess->fw_login_state = DSC_LS_LOGO_PEND;
4661                         sess->logo_ack_needed = 1;
4662                         memcpy(sess->iocb, iocb, IOCB_SIZE);
4663                 }
4664
4665                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4666
4667                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4668                     "%s: logo %llx res %d sess %p ",
4669                     __func__, wwn, res, sess);
4670                 if (res == 0) {
4671                         /*
4672                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
4673                          * for LOGO_ACK & sess delete
4674                          */
4675                         BUG_ON(!sess);
4676                         res = 0;
4677                 } else {
4678                         /* cmd did not go to upper layer. */
4679                         if (sess) {
4680                                 qlt_schedule_sess_for_deletion_lock(sess);
4681                                 res = 0;
4682                         }
4683                         /* else logo will be ack */
4684                 }
4685                 break;
4686         case ELS_PDISC:
4687         case ELS_ADISC:
4688         {
4689                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4690                 if (tgt->link_reinit_iocb_pending) {
4691                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4692                             0, 0, 0, 0, 0, 0);
4693                         tgt->link_reinit_iocb_pending = 0;
4694                 }
4695
4696                 sess = qla2x00_find_fcport_by_wwpn(vha,
4697                     iocb->u.isp24.port_name, 1);
4698                 if (sess) {
4699                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4700                                 "sess %p lid %d|%d DS %d LS %d\n",
4701                                 sess, sess->loop_id, loop_id,
4702                                 sess->disc_state, sess->fw_login_state);
4703                 }
4704
4705                 res = 1; /* send notify ack */
4706                 break;
4707         }
4708
4709         case ELS_FLOGI: /* should never happen */
4710         default:
4711                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4712                     "qla_target(%d): Unsupported ELS command %x "
4713                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4714                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4715                 break;
4716         }
4717
4718         return res;
4719 }
4720
4721 /*
4722  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4723  */
4724 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4725         struct imm_ntfy_from_isp *iocb)
4726 {
4727         struct qla_hw_data *ha = vha->hw;
4728         uint32_t add_flags = 0;
4729         int send_notify_ack = 1;
4730         uint16_t status;
4731
4732         status = le16_to_cpu(iocb->u.isp2x.status);
4733         switch (status) {
4734         case IMM_NTFY_LIP_RESET:
4735         {
4736                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4737                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4738                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4739                     iocb->u.isp24.status_subcode);
4740
4741                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4742                         send_notify_ack = 0;
4743                 break;
4744         }
4745
4746         case IMM_NTFY_LIP_LINK_REINIT:
4747         {
4748                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4749                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4750                     "qla_target(%d): LINK REINIT (loop %#x, "
4751                     "subcode %x)\n", vha->vp_idx,
4752                     le16_to_cpu(iocb->u.isp24.nport_handle),
4753                     iocb->u.isp24.status_subcode);
4754                 if (tgt->link_reinit_iocb_pending) {
4755                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4756                             0, 0, 0, 0, 0, 0);
4757                 }
4758                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4759                 tgt->link_reinit_iocb_pending = 1;
4760                 /*
4761                  * QLogic requires to wait after LINK REINIT for possible
4762                  * PDISC or ADISC ELS commands
4763                  */
4764                 send_notify_ack = 0;
4765                 break;
4766         }
4767
4768         case IMM_NTFY_PORT_LOGOUT:
4769                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4770                     "qla_target(%d): Port logout (loop "
4771                     "%#x, subcode %x)\n", vha->vp_idx,
4772                     le16_to_cpu(iocb->u.isp24.nport_handle),
4773                     iocb->u.isp24.status_subcode);
4774
4775                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4776                         send_notify_ack = 0;
4777                 /* The sessions will be cleared in the callback, if needed */
4778                 break;
4779
4780         case IMM_NTFY_GLBL_TPRLO:
4781                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4782                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4783                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4784                         send_notify_ack = 0;
4785                 /* The sessions will be cleared in the callback, if needed */
4786                 break;
4787
4788         case IMM_NTFY_PORT_CONFIG:
4789                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4790                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4791                     status);
4792                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4793                         send_notify_ack = 0;
4794                 /* The sessions will be cleared in the callback, if needed */
4795                 break;
4796
4797         case IMM_NTFY_GLBL_LOGO:
4798                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4799                     "qla_target(%d): Link failure detected\n",
4800                     vha->vp_idx);
4801                 /* I_T nexus loss */
4802                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4803                         send_notify_ack = 0;
4804                 break;
4805
4806         case IMM_NTFY_IOCB_OVERFLOW:
4807                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4808                     "qla_target(%d): Cannot provide requested "
4809                     "capability (IOCB overflowed the immediate notify "
4810                     "resource count)\n", vha->vp_idx);
4811                 break;
4812
4813         case IMM_NTFY_ABORT_TASK:
4814                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4815                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4816                     "L %#x)\n", vha->vp_idx,
4817                     le16_to_cpu(iocb->u.isp2x.seq_id),
4818                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4819                     le16_to_cpu(iocb->u.isp2x.lun));
4820                 if (qlt_abort_task(vha, iocb) == 0)
4821                         send_notify_ack = 0;
4822                 break;
4823
4824         case IMM_NTFY_RESOURCE:
4825                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4826                     "qla_target(%d): Out of resources, host %ld\n",
4827                     vha->vp_idx, vha->host_no);
4828                 break;
4829
4830         case IMM_NTFY_MSG_RX:
4831                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4832                     "qla_target(%d): Immediate notify task %x\n",
4833                     vha->vp_idx, iocb->u.isp2x.task_flags);
4834                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4835                         send_notify_ack = 0;
4836                 break;
4837
4838         case IMM_NTFY_ELS:
4839                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4840                         send_notify_ack = 0;
4841                 break;
4842         default:
4843                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4844                     "qla_target(%d): Received unknown immediate "
4845                     "notify status %x\n", vha->vp_idx, status);
4846                 break;
4847         }
4848
4849         if (send_notify_ack)
4850                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4851 }
4852
4853 /*
4854  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4855  * This function sends busy to ISP 2xxx or 24xx.
4856  */
4857 static int __qlt_send_busy(struct scsi_qla_host *vha,
4858         struct atio_from_isp *atio, uint16_t status)
4859 {
4860         struct ctio7_to_24xx *ctio24;
4861         struct qla_hw_data *ha = vha->hw;
4862         request_t *pkt;
4863         struct fc_port *sess = NULL;
4864         unsigned long flags;
4865
4866         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4867         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4868             atio->u.isp24.fcp_hdr.s_id);
4869         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4870         if (!sess) {
4871                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
4872                 return 0;
4873         }
4874         /* Sending marker isn't necessary, since we called from ISR */
4875
4876         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4877         if (!pkt) {
4878                 ql_dbg(ql_dbg_io, vha, 0x3063,
4879                     "qla_target(%d): %s failed: unable to allocate "
4880                     "request packet", vha->vp_idx, __func__);
4881                 return -ENOMEM;
4882         }
4883
4884         vha->tgt_counters.num_q_full_sent++;
4885         pkt->entry_count = 1;
4886         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4887
4888         ctio24 = (struct ctio7_to_24xx *)pkt;
4889         ctio24->entry_type = CTIO_TYPE7;
4890         ctio24->nport_handle = sess->loop_id;
4891         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
4892         ctio24->vp_index = vha->vp_idx;
4893         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4894         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4895         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4896         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4897         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4898             cpu_to_le16(
4899                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4900                 CTIO7_FLAGS_DONT_RET_CTIO);
4901         /*
4902          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4903          * if the explicit conformation is used.
4904          */
4905         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4906         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4907         /* Memory Barrier */
4908         wmb();
4909         qla2x00_start_iocbs(vha, vha->req);
4910         return 0;
4911 }
4912
4913 /*
4914  * This routine is used to allocate a command for either a QFull condition
4915  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4916  * out previously.
4917  */
4918 static void
4919 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4920         struct atio_from_isp *atio, uint16_t status, int qfull)
4921 {
4922         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4923         struct qla_hw_data *ha = vha->hw;
4924         struct fc_port *sess;
4925         struct se_session *se_sess;
4926         struct qla_tgt_cmd *cmd;
4927         int tag;
4928
4929         if (unlikely(tgt->tgt_stop)) {
4930                 ql_dbg(ql_dbg_io, vha, 0x300a,
4931                         "New command while device %p is shutting down\n", tgt);
4932                 return;
4933         }
4934
4935         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4936                 vha->hw->tgt.num_qfull_cmds_dropped++;
4937                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4938                         vha->qla_stats.stat_max_qfull_cmds_dropped)
4939                         vha->qla_stats.stat_max_qfull_cmds_dropped =
4940                                 vha->hw->tgt.num_qfull_cmds_dropped;
4941
4942                 ql_dbg(ql_dbg_io, vha, 0x3068,
4943                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4944                         vha->vp_idx, __func__,
4945                         vha->hw->tgt.num_qfull_cmds_dropped);
4946
4947                 qlt_chk_exch_leak_thresh_hold(vha);
4948                 return;
4949         }
4950
4951         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4952                 (vha, atio->u.isp24.fcp_hdr.s_id);
4953         if (!sess)
4954                 return;
4955
4956         se_sess = sess->se_sess;
4957
4958         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4959         if (tag < 0)
4960                 return;
4961
4962         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4963         if (!cmd) {
4964                 ql_dbg(ql_dbg_io, vha, 0x3009,
4965                         "qla_target(%d): %s: Allocation of cmd failed\n",
4966                         vha->vp_idx, __func__);
4967
4968                 vha->hw->tgt.num_qfull_cmds_dropped++;
4969                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4970                         vha->qla_stats.stat_max_qfull_cmds_dropped)
4971                         vha->qla_stats.stat_max_qfull_cmds_dropped =
4972                                 vha->hw->tgt.num_qfull_cmds_dropped;
4973
4974                 qlt_chk_exch_leak_thresh_hold(vha);
4975                 return;
4976         }
4977
4978         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4979
4980         qlt_incr_num_pend_cmds(vha);
4981         INIT_LIST_HEAD(&cmd->cmd_list);
4982         memcpy(&cmd->atio, atio, sizeof(*atio));
4983
4984         cmd->tgt = vha->vha_tgt.qla_tgt;
4985         cmd->vha = vha;
4986         cmd->reset_count = vha->hw->chip_reset;
4987         cmd->q_full = 1;
4988
4989         if (qfull) {
4990                 cmd->q_full = 1;
4991                 /* NOTE: borrowing the state field to carry the status */
4992                 cmd->state = status;
4993         } else
4994                 cmd->term_exchg = 1;
4995
4996         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
4997
4998         vha->hw->tgt.num_qfull_cmds_alloc++;
4999         if (vha->hw->tgt.num_qfull_cmds_alloc >
5000                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5001                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5002                         vha->hw->tgt.num_qfull_cmds_alloc;
5003 }
5004
5005 int
5006 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5007 {
5008         struct qla_hw_data *ha = vha->hw;
5009         unsigned long flags;
5010         struct qla_tgt_cmd *cmd, *tcmd;
5011         struct list_head free_list;
5012         int rc = 0;
5013
5014         if (list_empty(&ha->tgt.q_full_list))
5015                 return 0;
5016
5017         INIT_LIST_HEAD(&free_list);
5018
5019         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5020
5021         if (list_empty(&ha->tgt.q_full_list)) {
5022                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5023                 return 0;
5024         }
5025
5026         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5027                 if (cmd->q_full)
5028                         /* cmd->state is a borrowed field to hold status */
5029                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5030                 else if (cmd->term_exchg)
5031                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5032
5033                 if (rc == -ENOMEM)
5034                         break;
5035
5036                 if (cmd->q_full)
5037                         ql_dbg(ql_dbg_io, vha, 0x3006,
5038                             "%s: busy sent for ox_id[%04x]\n", __func__,
5039                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5040                 else if (cmd->term_exchg)
5041                         ql_dbg(ql_dbg_io, vha, 0x3007,
5042                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5043                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5044                 else
5045                         ql_dbg(ql_dbg_io, vha, 0x3008,
5046                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5047                             cmd);
5048
5049                 list_del(&cmd->cmd_list);
5050                 list_add_tail(&cmd->cmd_list, &free_list);
5051
5052                 /* piggy back on hardware_lock for protection */
5053                 vha->hw->tgt.num_qfull_cmds_alloc--;
5054         }
5055         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5056
5057         cmd = NULL;
5058
5059         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5060                 list_del(&cmd->cmd_list);
5061                 /* This cmd was never sent to TCM.  There is no need
5062                  * to schedule free or call free_cmd
5063                  */
5064                 qlt_free_cmd(cmd);
5065         }
5066         return rc;
5067 }
5068
5069 static void
5070 qlt_send_busy(struct scsi_qla_host *vha,
5071         struct atio_from_isp *atio, uint16_t status)
5072 {
5073         int rc = 0;
5074
5075         rc = __qlt_send_busy(vha, atio, status);
5076         if (rc == -ENOMEM)
5077                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5078 }
5079
5080 static int
5081 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5082         struct atio_from_isp *atio)
5083 {
5084         struct qla_hw_data *ha = vha->hw;
5085         uint16_t status;
5086
5087         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5088                 return 0;
5089
5090         status = temp_sam_status;
5091         qlt_send_busy(vha, atio, status);
5092         return 1;
5093 }
5094
5095 /* ha->hardware_lock supposed to be held on entry */
5096 /* called via callback from qla2xxx */
5097 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5098         struct atio_from_isp *atio, uint8_t ha_locked)
5099 {
5100         struct qla_hw_data *ha = vha->hw;
5101         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5102         int rc;
5103         unsigned long flags;
5104
5105         if (unlikely(tgt == NULL)) {
5106                 ql_dbg(ql_dbg_io, vha, 0x3064,
5107                     "ATIO pkt, but no tgt (ha %p)", ha);
5108                 return;
5109         }
5110         /*
5111          * In tgt_stop mode we also should allow all requests to pass.
5112          * Otherwise, some commands can stuck.
5113          */
5114
5115         tgt->atio_irq_cmd_count++;
5116
5117         switch (atio->u.raw.entry_type) {
5118         case ATIO_TYPE7:
5119                 if (unlikely(atio->u.isp24.exchange_addr ==
5120                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5121                         ql_dbg(ql_dbg_io, vha, 0x3065,
5122                             "qla_target(%d): ATIO_TYPE7 "
5123                             "received with UNKNOWN exchange address, "
5124                             "sending QUEUE_FULL\n", vha->vp_idx);
5125                         if (!ha_locked)
5126                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5127                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5128                         if (!ha_locked)
5129                                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5130                         break;
5131                 }
5132
5133
5134
5135                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5136                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
5137                         if (rc != 0) {
5138                                 tgt->atio_irq_cmd_count--;
5139                                 return;
5140                         }
5141                         rc = qlt_handle_cmd_for_atio(vha, atio);
5142                 } else {
5143                         rc = qlt_handle_task_mgmt(vha, atio);
5144                 }
5145                 if (unlikely(rc != 0)) {
5146                         if (rc == -ESRCH) {
5147                                 if (!ha_locked)
5148                                         spin_lock_irqsave
5149                                                 (&ha->hardware_lock, flags);
5150
5151 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5152                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5153 #else
5154                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5155 #endif
5156
5157                                 if (!ha_locked)
5158                                         spin_unlock_irqrestore
5159                                                 (&ha->hardware_lock, flags);
5160
5161                         } else {
5162                                 if (tgt->tgt_stop) {
5163                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5164                                             "qla_target: Unable to send "
5165                                             "command to target for req, "
5166                                             "ignoring.\n");
5167                                 } else {
5168                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5169                                             "qla_target(%d): Unable to send "
5170                                             "command to target, sending BUSY "
5171                                             "status.\n", vha->vp_idx);
5172                                         if (!ha_locked)
5173                                                 spin_lock_irqsave(
5174                                                     &ha->hardware_lock, flags);
5175                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5176                                         if (!ha_locked)
5177                                                 spin_unlock_irqrestore(
5178                                                     &ha->hardware_lock, flags);
5179                                 }
5180                         }
5181                 }
5182                 break;
5183
5184         case IMMED_NOTIFY_TYPE:
5185         {
5186                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5187                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5188                             "qla_target(%d): Received ATIO packet %x "
5189                             "with error status %x\n", vha->vp_idx,
5190                             atio->u.raw.entry_type,
5191                             atio->u.isp2x.entry_status);
5192                         break;
5193                 }
5194                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5195
5196                 if (!ha_locked)
5197                         spin_lock_irqsave(&ha->hardware_lock, flags);
5198                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5199                 if (!ha_locked)
5200                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5201                 break;
5202         }
5203
5204         default:
5205                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5206                     "qla_target(%d): Received unknown ATIO atio "
5207                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5208                 break;
5209         }
5210
5211         tgt->atio_irq_cmd_count--;
5212 }
5213
5214 /* ha->hardware_lock supposed to be held on entry */
5215 /* called via callback from qla2xxx */
5216 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5217 {
5218         struct qla_hw_data *ha = vha->hw;
5219         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5220
5221         if (unlikely(tgt == NULL)) {
5222                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5223                     "qla_target(%d): Response pkt %x received, but no "
5224                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5225                 return;
5226         }
5227
5228         /*
5229          * In tgt_stop mode we also should allow all requests to pass.
5230          * Otherwise, some commands can stuck.
5231          */
5232
5233         tgt->irq_cmd_count++;
5234
5235         switch (pkt->entry_type) {
5236         case CTIO_CRC2:
5237         case CTIO_TYPE7:
5238         {
5239                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5240                 qlt_do_ctio_completion(vha, entry->handle,
5241                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5242                     entry);
5243                 break;
5244         }
5245
5246         case ACCEPT_TGT_IO_TYPE:
5247         {
5248                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5249                 int rc;
5250                 if (atio->u.isp2x.status !=
5251                     cpu_to_le16(ATIO_CDB_VALID)) {
5252                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5253                             "qla_target(%d): ATIO with error "
5254                             "status %x received\n", vha->vp_idx,
5255                             le16_to_cpu(atio->u.isp2x.status));
5256                         break;
5257                 }
5258
5259                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5260                 if (rc != 0) {
5261                         tgt->irq_cmd_count--;
5262                         return;
5263                 }
5264
5265                 rc = qlt_handle_cmd_for_atio(vha, atio);
5266                 if (unlikely(rc != 0)) {
5267                         if (rc == -ESRCH) {
5268 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5269                                 qlt_send_busy(vha, atio, 0);
5270 #else
5271                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5272 #endif
5273                         } else {
5274                                 if (tgt->tgt_stop) {
5275                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5276                                             "qla_target: Unable to send "
5277                                             "command to target, sending TERM "
5278                                             "EXCHANGE for rsp\n");
5279                                         qlt_send_term_exchange(vha, NULL,
5280                                             atio, 1, 0);
5281                                 } else {
5282                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5283                                             "qla_target(%d): Unable to send "
5284                                             "command to target, sending BUSY "
5285                                             "status\n", vha->vp_idx);
5286                                         qlt_send_busy(vha, atio, 0);
5287                                 }
5288                         }
5289                 }
5290         }
5291         break;
5292
5293         case CONTINUE_TGT_IO_TYPE:
5294         {
5295                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5296                 qlt_do_ctio_completion(vha, entry->handle,
5297                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5298                     entry);
5299                 break;
5300         }
5301
5302         case CTIO_A64_TYPE:
5303         {
5304                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5305                 qlt_do_ctio_completion(vha, entry->handle,
5306                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5307                     entry);
5308                 break;
5309         }
5310
5311         case IMMED_NOTIFY_TYPE:
5312                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5313                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5314                 break;
5315
5316         case NOTIFY_ACK_TYPE:
5317                 if (tgt->notify_ack_expected > 0) {
5318                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5319                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5320                             "NOTIFY_ACK seq %08x status %x\n",
5321                             le16_to_cpu(entry->u.isp2x.seq_id),
5322                             le16_to_cpu(entry->u.isp2x.status));
5323                         tgt->notify_ack_expected--;
5324                         if (entry->u.isp2x.status !=
5325                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5326                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5327                                     "qla_target(%d): NOTIFY_ACK "
5328                                     "failed %x\n", vha->vp_idx,
5329                                     le16_to_cpu(entry->u.isp2x.status));
5330                         }
5331                 } else {
5332                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5333                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5334                             vha->vp_idx);
5335                 }
5336                 break;
5337
5338         case ABTS_RECV_24XX:
5339                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5340                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5341                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5342                 break;
5343
5344         case ABTS_RESP_24XX:
5345                 if (tgt->abts_resp_expected > 0) {
5346                         struct abts_resp_from_24xx_fw *entry =
5347                                 (struct abts_resp_from_24xx_fw *)pkt;
5348                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5349                             "ABTS_RESP_24XX: compl_status %x\n",
5350                             entry->compl_status);
5351                         tgt->abts_resp_expected--;
5352                         if (le16_to_cpu(entry->compl_status) !=
5353                             ABTS_RESP_COMPL_SUCCESS) {
5354                                 if ((entry->error_subcode1 == 0x1E) &&
5355                                     (entry->error_subcode2 == 0)) {
5356                                         /*
5357                                          * We've got a race here: aborted
5358                                          * exchange not terminated, i.e.
5359                                          * response for the aborted command was
5360                                          * sent between the abort request was
5361                                          * received and processed.
5362                                          * Unfortunately, the firmware has a
5363                                          * silly requirement that all aborted
5364                                          * exchanges must be explicitely
5365                                          * terminated, otherwise it refuses to
5366                                          * send responses for the abort
5367                                          * requests. So, we have to
5368                                          * (re)terminate the exchange and retry
5369                                          * the abort response.
5370                                          */
5371                                         qlt_24xx_retry_term_exchange(vha,
5372                                             entry);
5373                                 } else
5374                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5375                                             "qla_target(%d): ABTS_RESP_24XX "
5376                                             "failed %x (subcode %x:%x)",
5377                                             vha->vp_idx, entry->compl_status,
5378                                             entry->error_subcode1,
5379                                             entry->error_subcode2);
5380                         }
5381                 } else {
5382                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5383                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5384                             "received\n", vha->vp_idx);
5385                 }
5386                 break;
5387
5388         default:
5389                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5390                     "qla_target(%d): Received unknown response pkt "
5391                     "type %x\n", vha->vp_idx, pkt->entry_type);
5392                 break;
5393         }
5394
5395         tgt->irq_cmd_count--;
5396 }
5397
5398 /*
5399  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5400  */
5401 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5402         uint16_t *mailbox)
5403 {
5404         struct qla_hw_data *ha = vha->hw;
5405         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5406         int login_code;
5407
5408         if (!ha->tgt.tgt_ops)
5409                 return;
5410
5411         if (unlikely(tgt == NULL)) {
5412                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5413                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5414                 return;
5415         }
5416
5417         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5418             IS_QLA2100(ha))
5419                 return;
5420         /*
5421          * In tgt_stop mode we also should allow all requests to pass.
5422          * Otherwise, some commands can stuck.
5423          */
5424
5425         tgt->irq_cmd_count++;
5426
5427         switch (code) {
5428         case MBA_RESET:                 /* Reset */
5429         case MBA_SYSTEM_ERR:            /* System Error */
5430         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5431         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5432                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5433                     "qla_target(%d): System error async event %#x "
5434                     "occurred", vha->vp_idx, code);
5435                 break;
5436         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5437                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5438                 break;
5439
5440         case MBA_LOOP_UP:
5441         {
5442                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5443                     "qla_target(%d): Async LOOP_UP occurred "
5444                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5445                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5446                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5447                 if (tgt->link_reinit_iocb_pending) {
5448                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5449                             0, 0, 0, 0, 0, 0);
5450                         tgt->link_reinit_iocb_pending = 0;
5451                 }
5452                 break;
5453         }
5454
5455         case MBA_LIP_OCCURRED:
5456         case MBA_LOOP_DOWN:
5457         case MBA_LIP_RESET:
5458         case MBA_RSCN_UPDATE:
5459                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5460                     "qla_target(%d): Async event %#x occurred "
5461                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5462                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5463                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5464                 break;
5465
5466         case MBA_REJECTED_FCP_CMD:
5467                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
5468                         "qla_target(%d): Async event LS_REJECT occurred "
5469                         "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5470                         le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5471                         le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5472
5473                 if (le16_to_cpu(mailbox[3]) == 1) {
5474                         /* exchange starvation. */
5475                         vha->hw->exch_starvation++;
5476                         if (vha->hw->exch_starvation > 5) {
5477                                 ql_log(ql_log_warn, vha, 0xffff,
5478                                     "Exchange starvation-. Resetting RISC\n");
5479
5480                                 vha->hw->exch_starvation = 0;
5481                                 if (IS_P3P_TYPE(vha->hw))
5482                                         set_bit(FCOE_CTX_RESET_NEEDED,
5483                                             &vha->dpc_flags);
5484                                 else
5485                                         set_bit(ISP_ABORT_NEEDED,
5486                                             &vha->dpc_flags);
5487                                 qla2xxx_wake_dpc(vha);
5488                         }
5489                 }
5490                 break;
5491
5492         case MBA_PORT_UPDATE:
5493                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5494                     "qla_target(%d): Port update async event %#x "
5495                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5496                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5497                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5498                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5499
5500                 login_code = le16_to_cpu(mailbox[2]);
5501                 if (login_code == 0x4) {
5502                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5503                             "Async MB 2: Got PLOGI Complete\n");
5504                         vha->hw->exch_starvation = 0;
5505                 } else if (login_code == 0x7)
5506                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5507                             "Async MB 2: Port Logged Out\n");
5508                 break;
5509         default:
5510                 break;
5511         }
5512
5513         tgt->irq_cmd_count--;
5514 }
5515
5516 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5517         uint16_t loop_id)
5518 {
5519         fc_port_t *fcport, *tfcp, *del;
5520         int rc;
5521         unsigned long flags;
5522         u8 newfcport = 0;
5523
5524         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5525         if (!fcport) {
5526                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5527                     "qla_target(%d): Allocation of tmp FC port failed",
5528                     vha->vp_idx);
5529                 return NULL;
5530         }
5531
5532         fcport->loop_id = loop_id;
5533
5534         rc = qla2x00_get_port_database(vha, fcport, 0);
5535         if (rc != QLA_SUCCESS) {
5536                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5537                     "qla_target(%d): Failed to retrieve fcport "
5538                     "information -- get_port_database() returned %x "
5539                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5540                 kfree(fcport);
5541                 return NULL;
5542         }
5543
5544         del = NULL;
5545         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5546         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5547
5548         if (tfcp) {
5549                 tfcp->d_id = fcport->d_id;
5550                 tfcp->port_type = fcport->port_type;
5551                 tfcp->supported_classes = fcport->supported_classes;
5552                 tfcp->flags |= fcport->flags;
5553
5554                 del = fcport;
5555                 fcport = tfcp;
5556         } else {
5557                 if (vha->hw->current_topology == ISP_CFG_F)
5558                         fcport->flags |= FCF_FABRIC_DEVICE;
5559
5560                 list_add_tail(&fcport->list, &vha->vp_fcports);
5561                 if (!IS_SW_RESV_ADDR(fcport->d_id))
5562                    vha->fcport_count++;
5563                 fcport->login_gen++;
5564                 fcport->disc_state = DSC_LOGIN_COMPLETE;
5565                 fcport->login_succ = 1;
5566                 newfcport = 1;
5567         }
5568
5569         fcport->deleted = 0;
5570         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
5571
5572         switch (vha->host->active_mode) {
5573         case MODE_INITIATOR:
5574         case MODE_DUAL:
5575                 if (newfcport) {
5576                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5577                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5578                                    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
5579                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5580                                 qla24xx_post_upd_fcport_work(vha, fcport);
5581                         } else {
5582                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5583                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
5584                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5585                                 qla24xx_post_gpsc_work(vha, fcport);
5586                         }
5587                 }
5588                 break;
5589
5590         case MODE_TARGET:
5591         default:
5592                 break;
5593         }
5594         if (del)
5595                 qla2x00_free_fcport(del);
5596
5597         return fcport;
5598 }
5599
5600 /* Must be called under tgt_mutex */
5601 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5602         uint8_t *s_id)
5603 {
5604         struct fc_port *sess = NULL;
5605         fc_port_t *fcport = NULL;
5606         int rc, global_resets;
5607         uint16_t loop_id = 0;
5608
5609         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
5610                 /*
5611                  * This is Domain Controller, so it should be
5612                  * OK to drop SCSI commands from it.
5613                  */
5614                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5615                     "Unable to find initiator with S_ID %x:%x:%x",
5616                     s_id[0], s_id[1], s_id[2]);
5617                 return NULL;
5618         }
5619
5620         mutex_lock(&vha->vha_tgt.tgt_mutex);
5621
5622 retry:
5623         global_resets =
5624             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5625
5626         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5627         if (rc != 0) {
5628                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5629
5630                 ql_log(ql_log_info, vha, 0xf071,
5631                     "qla_target(%d): Unable to find "
5632                     "initiator with S_ID %x:%x:%x",
5633                     vha->vp_idx, s_id[0], s_id[1],
5634                     s_id[2]);
5635
5636                 if (rc == -ENOENT) {
5637                         qlt_port_logo_t logo;
5638                         sid_to_portid(s_id, &logo.id);
5639                         logo.cmd_count = 1;
5640                         qlt_send_first_logo(vha, &logo);
5641                 }
5642
5643                 return NULL;
5644         }
5645
5646         fcport = qlt_get_port_database(vha, loop_id);
5647         if (!fcport) {
5648                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5649                 return NULL;
5650         }
5651
5652         if (global_resets !=
5653             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5654                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5655                     "qla_target(%d): global reset during session discovery "
5656                     "(counter was %d, new %d), retrying", vha->vp_idx,
5657                     global_resets,
5658                     atomic_read(&vha->vha_tgt.
5659                         qla_tgt->tgt_global_resets_count));
5660                 goto retry;
5661         }
5662
5663         sess = qlt_create_sess(vha, fcport, true);
5664
5665         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5666
5667         return sess;
5668 }
5669
5670 static void qlt_abort_work(struct qla_tgt *tgt,
5671         struct qla_tgt_sess_work_param *prm)
5672 {
5673         struct scsi_qla_host *vha = tgt->vha;
5674         struct qla_hw_data *ha = vha->hw;
5675         struct fc_port *sess = NULL;
5676         unsigned long flags = 0, flags2 = 0;
5677         uint32_t be_s_id;
5678         uint8_t s_id[3];
5679         int rc;
5680
5681         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5682
5683         if (tgt->tgt_stop)
5684                 goto out_term2;
5685
5686         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5687         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5688         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5689
5690         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5691             (unsigned char *)&be_s_id);
5692         if (!sess) {
5693                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5694
5695                 sess = qlt_make_local_sess(vha, s_id);
5696                 /* sess has got an extra creation ref */
5697
5698                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5699                 if (!sess)
5700                         goto out_term2;
5701         } else {
5702                 if (sess->deleted) {
5703                         sess = NULL;
5704                         goto out_term2;
5705                 }
5706
5707                 if (!kref_get_unless_zero(&sess->sess_kref)) {
5708                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
5709                             "%s: kref_get fail %8phC \n",
5710                              __func__, sess->port_name);
5711                         sess = NULL;
5712                         goto out_term2;
5713                 }
5714         }
5715
5716         spin_lock_irqsave(&ha->hardware_lock, flags);
5717
5718         if (tgt->tgt_stop)
5719                 goto out_term;
5720
5721         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5722         if (rc != 0)
5723                 goto out_term;
5724         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5725         if (sess)
5726                 ha->tgt.tgt_ops->put_sess(sess);
5727         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5728         return;
5729
5730 out_term2:
5731         spin_lock_irqsave(&ha->hardware_lock, flags);
5732
5733 out_term:
5734         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5735         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5736
5737         if (sess)
5738                 ha->tgt.tgt_ops->put_sess(sess);
5739         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5740 }
5741
5742 static void qlt_tmr_work(struct qla_tgt *tgt,
5743         struct qla_tgt_sess_work_param *prm)
5744 {
5745         struct atio_from_isp *a = &prm->tm_iocb2;
5746         struct scsi_qla_host *vha = tgt->vha;
5747         struct qla_hw_data *ha = vha->hw;
5748         struct fc_port *sess = NULL;
5749         unsigned long flags;
5750         uint8_t *s_id = NULL; /* to hide compiler warnings */
5751         int rc;
5752         uint32_t lun, unpacked_lun;
5753         int fn;
5754         void *iocb;
5755
5756         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5757
5758         if (tgt->tgt_stop)
5759                 goto out_term;
5760
5761         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5762         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5763         if (!sess) {
5764                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5765
5766                 sess = qlt_make_local_sess(vha, s_id);
5767                 /* sess has got an extra creation ref */
5768
5769                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5770                 if (!sess)
5771                         goto out_term;
5772         } else {
5773                 if (sess->deleted) {
5774                         sess = NULL;
5775                         goto out_term;
5776                 }
5777
5778                 if (!kref_get_unless_zero(&sess->sess_kref)) {
5779                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
5780                             "%s: kref_get fail %8phC\n",
5781                              __func__, sess->port_name);
5782                         sess = NULL;
5783                         goto out_term;
5784                 }
5785         }
5786
5787         iocb = a;
5788         lun = a->u.isp24.fcp_cmnd.lun;
5789         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5790         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5791
5792         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5793         if (rc != 0)
5794                 goto out_term;
5795
5796         ha->tgt.tgt_ops->put_sess(sess);
5797         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5798         return;
5799
5800 out_term:
5801         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0);
5802         ha->tgt.tgt_ops->put_sess(sess);
5803         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5804 }
5805
5806 static void qlt_sess_work_fn(struct work_struct *work)
5807 {
5808         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5809         struct scsi_qla_host *vha = tgt->vha;
5810         unsigned long flags;
5811
5812         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5813
5814         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5815         while (!list_empty(&tgt->sess_works_list)) {
5816                 struct qla_tgt_sess_work_param *prm = list_entry(
5817                     tgt->sess_works_list.next, typeof(*prm),
5818                     sess_works_list_entry);
5819
5820                 /*
5821                  * This work can be scheduled on several CPUs at time, so we
5822                  * must delete the entry to eliminate double processing
5823                  */
5824                 list_del(&prm->sess_works_list_entry);
5825
5826                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5827
5828                 switch (prm->type) {
5829                 case QLA_TGT_SESS_WORK_ABORT:
5830                         qlt_abort_work(tgt, prm);
5831                         break;
5832                 case QLA_TGT_SESS_WORK_TM:
5833                         qlt_tmr_work(tgt, prm);
5834                         break;
5835                 default:
5836                         BUG_ON(1);
5837                         break;
5838                 }
5839
5840                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5841
5842                 kfree(prm);
5843         }
5844         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5845 }
5846
5847 /* Must be called under tgt_host_action_mutex */
5848 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5849 {
5850         struct qla_tgt *tgt;
5851
5852         if (!QLA_TGT_MODE_ENABLED())
5853                 return 0;
5854
5855         if (!IS_TGT_MODE_CAPABLE(ha)) {
5856                 ql_log(ql_log_warn, base_vha, 0xe070,
5857                     "This adapter does not support target mode.\n");
5858                 return 0;
5859         }
5860
5861         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5862             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5863
5864         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5865
5866         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5867         if (!tgt) {
5868                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5869                     "Unable to allocate struct qla_tgt\n");
5870                 return -ENOMEM;
5871         }
5872
5873         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5874                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5875
5876         tgt->ha = ha;
5877         tgt->vha = base_vha;
5878         init_waitqueue_head(&tgt->waitQ);
5879         INIT_LIST_HEAD(&tgt->del_sess_list);
5880         spin_lock_init(&tgt->sess_work_lock);
5881         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5882         INIT_LIST_HEAD(&tgt->sess_works_list);
5883         atomic_set(&tgt->tgt_global_resets_count, 0);
5884
5885         base_vha->vha_tgt.qla_tgt = tgt;
5886
5887         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5888                 "qla_target(%d): using 64 Bit PCI addressing",
5889                 base_vha->vp_idx);
5890         tgt->tgt_enable_64bit_addr = 1;
5891         /* 3 is reserved */
5892         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5893         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5894         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5895
5896         if (base_vha->fc_vport)
5897                 return 0;
5898
5899         mutex_lock(&qla_tgt_mutex);
5900         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5901         mutex_unlock(&qla_tgt_mutex);
5902
5903         return 0;
5904 }
5905
5906 /* Must be called under tgt_host_action_mutex */
5907 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5908 {
5909         if (!vha->vha_tgt.qla_tgt)
5910                 return 0;
5911
5912         if (vha->fc_vport) {
5913                 qlt_release(vha->vha_tgt.qla_tgt);
5914                 return 0;
5915         }
5916
5917         /* free left over qfull cmds */
5918         qlt_init_term_exchange(vha);
5919
5920         mutex_lock(&qla_tgt_mutex);
5921         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5922         mutex_unlock(&qla_tgt_mutex);
5923
5924         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5925             vha->host_no, ha);
5926         qlt_release(vha->vha_tgt.qla_tgt);
5927
5928         return 0;
5929 }
5930
5931 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5932         unsigned char *b)
5933 {
5934         int i;
5935
5936         pr_debug("qla2xxx HW vha->node_name: ");
5937         for (i = 0; i < WWN_SIZE; i++)
5938                 pr_debug("%02x ", vha->node_name[i]);
5939         pr_debug("\n");
5940         pr_debug("qla2xxx HW vha->port_name: ");
5941         for (i = 0; i < WWN_SIZE; i++)
5942                 pr_debug("%02x ", vha->port_name[i]);
5943         pr_debug("\n");
5944
5945         pr_debug("qla2xxx passed configfs WWPN: ");
5946         put_unaligned_be64(wwpn, b);
5947         for (i = 0; i < WWN_SIZE; i++)
5948                 pr_debug("%02x ", b[i]);
5949         pr_debug("\n");
5950 }
5951
5952 /**
5953  * qla_tgt_lport_register - register lport with external module
5954  *
5955  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5956  * @wwpn: Passwd FC target WWPN
5957  * @callback:  lport initialization callback for tcm_qla2xxx code
5958  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5959  */
5960 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5961                        u64 npiv_wwpn, u64 npiv_wwnn,
5962                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5963 {
5964         struct qla_tgt *tgt;
5965         struct scsi_qla_host *vha;
5966         struct qla_hw_data *ha;
5967         struct Scsi_Host *host;
5968         unsigned long flags;
5969         int rc;
5970         u8 b[WWN_SIZE];
5971
5972         mutex_lock(&qla_tgt_mutex);
5973         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5974                 vha = tgt->vha;
5975                 ha = vha->hw;
5976
5977                 host = vha->host;
5978                 if (!host)
5979                         continue;
5980
5981                 if (!(host->hostt->supported_mode & MODE_TARGET))
5982                         continue;
5983
5984                 spin_lock_irqsave(&ha->hardware_lock, flags);
5985                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5986                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5987                             host->host_no);
5988                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5989                         continue;
5990                 }
5991                 if (tgt->tgt_stop) {
5992                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5993                                  host->host_no);
5994                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5995                         continue;
5996                 }
5997                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5998
5999                 if (!scsi_host_get(host)) {
6000                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6001                             "Unable to scsi_host_get() for"
6002                             " qla2xxx scsi_host\n");
6003                         continue;
6004                 }
6005                 qlt_lport_dump(vha, phys_wwpn, b);
6006
6007                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6008                         scsi_host_put(host);
6009                         continue;
6010                 }
6011                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6012                 if (rc != 0)
6013                         scsi_host_put(host);
6014
6015                 mutex_unlock(&qla_tgt_mutex);
6016                 return rc;
6017         }
6018         mutex_unlock(&qla_tgt_mutex);
6019
6020         return -ENODEV;
6021 }
6022 EXPORT_SYMBOL(qlt_lport_register);
6023
6024 /**
6025  * qla_tgt_lport_deregister - Degister lport
6026  *
6027  * @vha:  Registered scsi_qla_host pointer
6028  */
6029 void qlt_lport_deregister(struct scsi_qla_host *vha)
6030 {
6031         struct qla_hw_data *ha = vha->hw;
6032         struct Scsi_Host *sh = vha->host;
6033         /*
6034          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6035          */
6036         vha->vha_tgt.target_lport_ptr = NULL;
6037         ha->tgt.tgt_ops = NULL;
6038         /*
6039          * Release the Scsi_Host reference for the underlying qla2xxx host
6040          */
6041         scsi_host_put(sh);
6042 }
6043 EXPORT_SYMBOL(qlt_lport_deregister);
6044
6045 /* Must be called under HW lock */
6046 static void qlt_set_mode(struct scsi_qla_host *vha)
6047 {
6048         switch (ql2x_ini_mode) {
6049         case QLA2XXX_INI_MODE_DISABLED:
6050         case QLA2XXX_INI_MODE_EXCLUSIVE:
6051                 vha->host->active_mode = MODE_TARGET;
6052                 break;
6053         case QLA2XXX_INI_MODE_ENABLED:
6054                 vha->host->active_mode = MODE_UNKNOWN;
6055                 break;
6056         case QLA2XXX_INI_MODE_DUAL:
6057                 vha->host->active_mode = MODE_DUAL;
6058                 break;
6059         default:
6060                 break;
6061         }
6062 }
6063
6064 /* Must be called under HW lock */
6065 static void qlt_clear_mode(struct scsi_qla_host *vha)
6066 {
6067         switch (ql2x_ini_mode) {
6068         case QLA2XXX_INI_MODE_DISABLED:
6069                 vha->host->active_mode = MODE_UNKNOWN;
6070                 break;
6071         case QLA2XXX_INI_MODE_EXCLUSIVE:
6072                 vha->host->active_mode = MODE_INITIATOR;
6073                 break;
6074         case QLA2XXX_INI_MODE_ENABLED:
6075         case QLA2XXX_INI_MODE_DUAL:
6076                 vha->host->active_mode = MODE_INITIATOR;
6077                 break;
6078         default:
6079                 break;
6080         }
6081 }
6082
6083 /*
6084  * qla_tgt_enable_vha - NO LOCK HELD
6085  *
6086  * host_reset, bring up w/ Target Mode Enabled
6087  */
6088 void
6089 qlt_enable_vha(struct scsi_qla_host *vha)
6090 {
6091         struct qla_hw_data *ha = vha->hw;
6092         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6093         unsigned long flags;
6094         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6095         int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER;
6096
6097         if (!tgt) {
6098                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6099                     "Unable to locate qla_tgt pointer from"
6100                     " struct qla_hw_data\n");
6101                 dump_stack();
6102                 return;
6103         }
6104
6105         spin_lock_irqsave(&ha->hardware_lock, flags);
6106         tgt->tgt_stopped = 0;
6107         qlt_set_mode(vha);
6108         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6109
6110         if (vha->vp_idx) {
6111                 qla24xx_disable_vp(vha);
6112                 qla24xx_enable_vp(vha);
6113         } else {
6114                 if (ha->msix_entries) {
6115                         ql_dbg(ql_dbg_tgt, vha, 0xffff,
6116                             "%s: host%ld : vector %d cpu %d\n",
6117                             __func__, vha->host_no,
6118                             ha->msix_entries[rspq_ent].vector,
6119                             ha->msix_entries[rspq_ent].cpuid);
6120
6121                         ha->tgt.rspq_vector_cpuid =
6122                             ha->msix_entries[rspq_ent].cpuid;
6123                 }
6124
6125                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6126                 qla2xxx_wake_dpc(base_vha);
6127                 qla2x00_wait_for_hba_online(base_vha);
6128         }
6129 }
6130 EXPORT_SYMBOL(qlt_enable_vha);
6131
6132 /*
6133  * qla_tgt_disable_vha - NO LOCK HELD
6134  *
6135  * Disable Target Mode and reset the adapter
6136  */
6137 static void qlt_disable_vha(struct scsi_qla_host *vha)
6138 {
6139         struct qla_hw_data *ha = vha->hw;
6140         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6141         unsigned long flags;
6142
6143         if (!tgt) {
6144                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6145                     "Unable to locate qla_tgt pointer from"
6146                     " struct qla_hw_data\n");
6147                 dump_stack();
6148                 return;
6149         }
6150
6151         spin_lock_irqsave(&ha->hardware_lock, flags);
6152         qlt_clear_mode(vha);
6153         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6154
6155         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6156         qla2xxx_wake_dpc(vha);
6157         qla2x00_wait_for_hba_online(vha);
6158 }
6159
6160 /*
6161  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6162  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6163  * members.
6164  */
6165 void
6166 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6167 {
6168         vha->vha_tgt.qla_tgt = NULL;
6169
6170         mutex_init(&vha->vha_tgt.tgt_mutex);
6171         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6172
6173         qlt_clear_mode(vha);
6174
6175         /*
6176          * NOTE: Currently the value is kept the same for <24xx and
6177          * >=24xx ISPs. If it is necessary to change it,
6178          * the check should be added for specific ISPs,
6179          * assigning the value appropriately.
6180          */
6181         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6182
6183         qlt_add_target(ha, vha);
6184 }
6185
6186 void
6187 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6188 {
6189         /*
6190          * FC-4 Feature bit 0 indicates target functionality to the name server.
6191          */
6192         if (qla_tgt_mode_enabled(vha)) {
6193                 ct_req->req.rff_id.fc4_feature = BIT_0;
6194         } else if (qla_ini_mode_enabled(vha)) {
6195                 ct_req->req.rff_id.fc4_feature = BIT_1;
6196         } else if (qla_dual_mode_enabled(vha))
6197                 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6198 }
6199
6200 /*
6201  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6202  * @ha: HA context
6203  *
6204  * Beginning of ATIO ring has initialization control block already built
6205  * by nvram config routine.
6206  *
6207  * Returns 0 on success.
6208  */
6209 void
6210 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6211 {
6212         struct qla_hw_data *ha = vha->hw;
6213         uint16_t cnt;
6214         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6215
6216         if (qla_ini_mode_enabled(vha))
6217                 return;
6218
6219         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6220                 pkt->u.raw.signature = ATIO_PROCESSED;
6221                 pkt++;
6222         }
6223
6224 }
6225
6226 /*
6227  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6228  * @ha: SCSI driver HA context
6229  */
6230 void
6231 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6232 {
6233         struct qla_hw_data *ha = vha->hw;
6234         struct atio_from_isp *pkt;
6235         int cnt, i;
6236
6237         if (!vha->flags.online)
6238                 return;
6239
6240         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6241             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6242                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6243                 cnt = pkt->u.raw.entry_count;
6244
6245                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6246                         /*
6247                          * This packet is corrupted. The header + payload
6248                          * can not be trusted. There is no point in passing
6249                          * it further up.
6250                          */
6251                         ql_log(ql_log_warn, vha, 0xffff,
6252                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6253                             pkt->u.isp24.fcp_hdr.s_id,
6254                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6255                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6256
6257                         adjust_corrupted_atio(pkt);
6258                         qlt_send_term_exchange(vha, NULL, pkt, ha_locked, 0);
6259                 } else {
6260                         qlt_24xx_atio_pkt_all_vps(vha,
6261                             (struct atio_from_isp *)pkt, ha_locked);
6262                 }
6263
6264                 for (i = 0; i < cnt; i++) {
6265                         ha->tgt.atio_ring_index++;
6266                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6267                                 ha->tgt.atio_ring_index = 0;
6268                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6269                         } else
6270                                 ha->tgt.atio_ring_ptr++;
6271
6272                         pkt->u.raw.signature = ATIO_PROCESSED;
6273                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6274                 }
6275                 wmb();
6276         }
6277
6278         /* Adjust ring index */
6279         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6280         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6281 }
6282
6283 void
6284 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6285 {
6286         struct qla_hw_data *ha = vha->hw;
6287         if (!QLA_TGT_MODE_ENABLED())
6288                 return;
6289
6290         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6291         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6292         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6293
6294         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6295                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6296                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6297
6298                 icb->msix_atio = cpu_to_le16(msix->entry);
6299                 ql_dbg(ql_dbg_init, vha, 0xf072,
6300                     "Registering ICB vector 0x%x for atio que.\n",
6301                     msix->entry);
6302         }
6303 }
6304
6305 void
6306 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6307 {
6308         struct qla_hw_data *ha = vha->hw;
6309         u32 tmp;
6310         u16 t;
6311
6312         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6313                 if (!ha->tgt.saved_set) {
6314                         /* We save only once */
6315                         ha->tgt.saved_exchange_count = nv->exchange_count;
6316                         ha->tgt.saved_firmware_options_1 =
6317                             nv->firmware_options_1;
6318                         ha->tgt.saved_firmware_options_2 =
6319                             nv->firmware_options_2;
6320                         ha->tgt.saved_firmware_options_3 =
6321                             nv->firmware_options_3;
6322                         ha->tgt.saved_set = 1;
6323                 }
6324
6325                 if (qla_tgt_mode_enabled(vha)) {
6326                         nv->exchange_count = cpu_to_le16(0xFFFF);
6327                 } else {                        /* dual */
6328                         if (ql_dm_tgt_ex_pct > 100) {
6329                                 ql_dm_tgt_ex_pct = 50;
6330                         } else if (ql_dm_tgt_ex_pct == 100) {
6331                                 /* leave some for FW */
6332                                 ql_dm_tgt_ex_pct = 95;
6333                         }
6334
6335                         tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct;
6336                         tmp = tmp/100;
6337                         if (tmp > 0xffff)
6338                                 tmp = 0xffff;
6339
6340                         t = tmp & 0xffff;
6341                         nv->exchange_count = cpu_to_le16(t);
6342                 }
6343
6344                 /* Enable target mode */
6345                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6346
6347                 /* Disable ini mode, if requested */
6348                 if (qla_tgt_mode_enabled(vha))
6349                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6350
6351                 /* Disable Full Login after LIP */
6352                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6353                 /* Enable initial LIP */
6354                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6355                 if (ql2xtgt_tape_enable)
6356                         /* Enable FC Tape support */
6357                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6358                 else
6359                         /* Disable FC Tape support */
6360                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6361
6362                 /* Disable Full Login after LIP */
6363                 nv->host_p &= cpu_to_le32(~BIT_10);
6364
6365                 /*
6366                  * clear BIT 15 explicitly as we have seen at least
6367                  * a couple of instances where this was set and this
6368                  * was causing the firmware to not be initialized.
6369                  */
6370                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6371                 /* Enable target PRLI control */
6372                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6373         } else {
6374                 if (ha->tgt.saved_set) {
6375                         nv->exchange_count = ha->tgt.saved_exchange_count;
6376                         nv->firmware_options_1 =
6377                             ha->tgt.saved_firmware_options_1;
6378                         nv->firmware_options_2 =
6379                             ha->tgt.saved_firmware_options_2;
6380                         nv->firmware_options_3 =
6381                             ha->tgt.saved_firmware_options_3;
6382                 }
6383                 return;
6384         }
6385
6386         if (ha->tgt.enable_class_2) {
6387                 if (vha->flags.init_done)
6388                         fc_host_supported_classes(vha->host) =
6389                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6390
6391                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6392         } else {
6393                 if (vha->flags.init_done)
6394                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6395
6396                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6397         }
6398 }
6399
6400 void
6401 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6402         struct init_cb_24xx *icb)
6403 {
6404         struct qla_hw_data *ha = vha->hw;
6405
6406         if (!QLA_TGT_MODE_ENABLED())
6407                 return;
6408
6409         if (ha->tgt.node_name_set) {
6410                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6411                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6412         }
6413
6414         /* disable ZIO at start time. */
6415         if (!vha->flags.init_done) {
6416                 uint32_t tmp;
6417                 tmp = le32_to_cpu(icb->firmware_options_2);
6418                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6419                 icb->firmware_options_2 = cpu_to_le32(tmp);
6420         }
6421 }
6422
6423 void
6424 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6425 {
6426         struct qla_hw_data *ha = vha->hw;
6427         u32 tmp;
6428         u16 t;
6429
6430         if (!QLA_TGT_MODE_ENABLED())
6431                 return;
6432
6433         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6434                 if (!ha->tgt.saved_set) {
6435                         /* We save only once */
6436                         ha->tgt.saved_exchange_count = nv->exchange_count;
6437                         ha->tgt.saved_firmware_options_1 =
6438                             nv->firmware_options_1;
6439                         ha->tgt.saved_firmware_options_2 =
6440                             nv->firmware_options_2;
6441                         ha->tgt.saved_firmware_options_3 =
6442                             nv->firmware_options_3;
6443                         ha->tgt.saved_set = 1;
6444                 }
6445
6446                 if (qla_tgt_mode_enabled(vha)) {
6447                         nv->exchange_count = cpu_to_le16(0xFFFF);
6448                 } else {                        /* dual */
6449                         if (ql_dm_tgt_ex_pct > 100) {
6450                                 ql_dm_tgt_ex_pct = 50;
6451                         } else if (ql_dm_tgt_ex_pct == 100) {
6452                                 /* leave some for FW */
6453                                 ql_dm_tgt_ex_pct = 95;
6454                         }
6455
6456                         tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct;
6457                         tmp = tmp/100;
6458                         if (tmp > 0xffff)
6459                                 tmp = 0xffff;
6460                         t = tmp & 0xffff;
6461                         nv->exchange_count = cpu_to_le16(t);
6462                 }
6463
6464                 /* Enable target mode */
6465                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6466
6467                 /* Disable ini mode, if requested */
6468                 if (qla_tgt_mode_enabled(vha))
6469                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6470                 /* Disable Full Login after LIP */
6471                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6472                 /* Enable initial LIP */
6473                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6474                 /*
6475                  * clear BIT 15 explicitly as we have seen at
6476                  * least a couple of instances where this was set
6477                  * and this was causing the firmware to not be
6478                  * initialized.
6479                  */
6480                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6481                 if (ql2xtgt_tape_enable)
6482                         /* Enable FC tape support */
6483                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6484                 else
6485                         /* Disable FC tape support */
6486                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6487
6488                 /* Disable Full Login after LIP */
6489                 nv->host_p &= cpu_to_le32(~BIT_10);
6490                 /* Enable target PRLI control */
6491                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6492         } else {
6493                 if (ha->tgt.saved_set) {
6494                         nv->exchange_count = ha->tgt.saved_exchange_count;
6495                         nv->firmware_options_1 =
6496                             ha->tgt.saved_firmware_options_1;
6497                         nv->firmware_options_2 =
6498                             ha->tgt.saved_firmware_options_2;
6499                         nv->firmware_options_3 =
6500                             ha->tgt.saved_firmware_options_3;
6501                 }
6502                 return;
6503         }
6504
6505         if (ha->tgt.enable_class_2) {
6506                 if (vha->flags.init_done)
6507                         fc_host_supported_classes(vha->host) =
6508                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6509
6510                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6511         } else {
6512                 if (vha->flags.init_done)
6513                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6514
6515                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6516         }
6517 }
6518
6519 void
6520 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6521         struct init_cb_81xx *icb)
6522 {
6523         struct qla_hw_data *ha = vha->hw;
6524
6525         if (!QLA_TGT_MODE_ENABLED())
6526                 return;
6527
6528         if (ha->tgt.node_name_set) {
6529                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6530                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6531         }
6532
6533         /* disable ZIO at start time. */
6534         if (!vha->flags.init_done) {
6535                 uint32_t tmp;
6536                 tmp = le32_to_cpu(icb->firmware_options_2);
6537                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6538                 icb->firmware_options_2 = cpu_to_le32(tmp);
6539         }
6540
6541 }
6542
6543 void
6544 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6545 {
6546         if (!QLA_TGT_MODE_ENABLED())
6547                 return;
6548
6549         ha->msix_count += 1; /* For ATIO Q */
6550 }
6551
6552 int
6553 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6554         struct sts_entry_24xx *pkt)
6555 {
6556         switch (pkt->entry_type) {
6557         case ABTS_RECV_24XX:
6558         case ABTS_RESP_24XX:
6559         case CTIO_TYPE7:
6560         case NOTIFY_ACK_TYPE:
6561         case CTIO_CRC2:
6562                 return 1;
6563         default:
6564                 return 0;
6565         }
6566 }
6567
6568 void
6569 qlt_modify_vp_config(struct scsi_qla_host *vha,
6570         struct vp_config_entry_24xx *vpmod)
6571 {
6572         /* enable target mode.  Bit5 = 1 => disable */
6573         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6574                 vpmod->options_idx1 &= ~BIT_5;
6575
6576         /* Disable ini mode, if requested.  bit4 = 1 => disable */
6577         if (qla_tgt_mode_enabled(vha))
6578                 vpmod->options_idx1 &= ~BIT_4;
6579 }
6580
6581 void
6582 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6583 {
6584         if (!QLA_TGT_MODE_ENABLED())
6585                 return;
6586
6587         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6588                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6589                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6590         } else {
6591                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6592                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6593         }
6594
6595         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6596         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6597
6598         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
6599         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
6600             qlt_unknown_atio_work_fn);
6601
6602         qlt_clear_mode(base_vha);
6603 }
6604
6605 irqreturn_t
6606 qla83xx_msix_atio_q(int irq, void *dev_id)
6607 {
6608         struct rsp_que *rsp;
6609         scsi_qla_host_t *vha;
6610         struct qla_hw_data *ha;
6611         unsigned long flags;
6612
6613         rsp = (struct rsp_que *) dev_id;
6614         ha = rsp->hw;
6615         vha = pci_get_drvdata(ha->pdev);
6616
6617         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6618
6619         qlt_24xx_process_atio_queue(vha, 0);
6620
6621         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6622
6623         return IRQ_HANDLED;
6624 }
6625
6626 static void
6627 qlt_handle_abts_recv_work(struct work_struct *work)
6628 {
6629         struct qla_tgt_sess_op *op = container_of(work,
6630                 struct qla_tgt_sess_op, work);
6631         scsi_qla_host_t *vha = op->vha;
6632         struct qla_hw_data *ha = vha->hw;
6633         unsigned long flags;
6634
6635         if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset))
6636                 return;
6637
6638         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6639         qlt_24xx_process_atio_queue(vha, 0);
6640         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6641
6642         spin_lock_irqsave(&ha->hardware_lock, flags);
6643         qlt_response_pkt_all_vps(vha, (response_t *)&op->atio);
6644         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6645 }
6646
6647 void
6648 qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt)
6649 {
6650         struct qla_tgt_sess_op *op;
6651
6652         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6653
6654         if (!op) {
6655                 /* do not reach for ATIO queue here.  This is best effort err
6656                  * recovery at this point.
6657                  */
6658                 qlt_response_pkt_all_vps(vha, pkt);
6659                 return;
6660         }
6661
6662         memcpy(&op->atio, pkt, sizeof(*pkt));
6663         op->vha = vha;
6664         op->chip_reset = vha->hw->chip_reset;
6665         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6666         queue_work(qla_tgt_wq, &op->work);
6667         return;
6668 }
6669
6670 int
6671 qlt_mem_alloc(struct qla_hw_data *ha)
6672 {
6673         if (!QLA_TGT_MODE_ENABLED())
6674                 return 0;
6675
6676         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6677             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6678         if (!ha->tgt.tgt_vp_map)
6679                 return -ENOMEM;
6680
6681         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6682             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6683             &ha->tgt.atio_dma, GFP_KERNEL);
6684         if (!ha->tgt.atio_ring) {
6685                 kfree(ha->tgt.tgt_vp_map);
6686                 return -ENOMEM;
6687         }
6688         return 0;
6689 }
6690
6691 void
6692 qlt_mem_free(struct qla_hw_data *ha)
6693 {
6694         if (!QLA_TGT_MODE_ENABLED())
6695                 return;
6696
6697         if (ha->tgt.atio_ring) {
6698                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6699                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6700                     ha->tgt.atio_dma);
6701         }
6702         kfree(ha->tgt.tgt_vp_map);
6703 }
6704
6705 /* vport_slock to be held by the caller */
6706 void
6707 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6708 {
6709         if (!QLA_TGT_MODE_ENABLED())
6710                 return;
6711
6712         switch (cmd) {
6713         case SET_VP_IDX:
6714                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6715                 break;
6716         case SET_AL_PA:
6717                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6718                 break;
6719         case RESET_VP_IDX:
6720                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6721                 break;
6722         case RESET_AL_PA:
6723                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6724                 break;
6725         }
6726 }
6727
6728 static int __init qlt_parse_ini_mode(void)
6729 {
6730         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6731                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6732         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6733                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6734         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6735                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6736         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
6737                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
6738         else
6739                 return false;
6740
6741         return true;
6742 }
6743
6744 int __init qlt_init(void)
6745 {
6746         int ret;
6747
6748         if (!qlt_parse_ini_mode()) {
6749                 ql_log(ql_log_fatal, NULL, 0xe06b,
6750                     "qlt_parse_ini_mode() failed\n");
6751                 return -EINVAL;
6752         }
6753
6754         if (!QLA_TGT_MODE_ENABLED())
6755                 return 0;
6756
6757         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6758             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6759             qla_tgt_mgmt_cmd), 0, NULL);
6760         if (!qla_tgt_mgmt_cmd_cachep) {
6761                 ql_log(ql_log_fatal, NULL, 0xe06d,
6762                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6763                 return -ENOMEM;
6764         }
6765
6766         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
6767             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
6768             0, NULL);
6769
6770         if (!qla_tgt_plogi_cachep) {
6771                 ql_log(ql_log_fatal, NULL, 0xe06d,
6772                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
6773                 ret = -ENOMEM;
6774                 goto out_mgmt_cmd_cachep;
6775         }
6776
6777         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6778             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6779         if (!qla_tgt_mgmt_cmd_mempool) {
6780                 ql_log(ql_log_fatal, NULL, 0xe06e,
6781                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6782                 ret = -ENOMEM;
6783                 goto out_plogi_cachep;
6784         }
6785
6786         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6787         if (!qla_tgt_wq) {
6788                 ql_log(ql_log_fatal, NULL, 0xe06f,
6789                     "alloc_workqueue for qla_tgt_wq failed\n");
6790                 ret = -ENOMEM;
6791                 goto out_cmd_mempool;
6792         }
6793         /*
6794          * Return 1 to signal that initiator-mode is being disabled
6795          */
6796         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6797
6798 out_cmd_mempool:
6799         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6800 out_plogi_cachep:
6801         kmem_cache_destroy(qla_tgt_plogi_cachep);
6802 out_mgmt_cmd_cachep:
6803         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6804         return ret;
6805 }
6806
6807 void qlt_exit(void)
6808 {
6809         if (!QLA_TGT_MODE_ENABLED())
6810                 return;
6811
6812         destroy_workqueue(qla_tgt_wq);
6813         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6814         kmem_cache_destroy(qla_tgt_plogi_cachep);
6815         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6816 }