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 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 134         struct abts_recv_from_24xx *);
 135
 136 /*
 137  * Global Variables
 138  */
 139 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 140 static struct kmem_cache *qla_tgt_plogi_cachep;
 141 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 142 static struct workqueue_struct *qla_tgt_wq;
 143 static DEFINE_MUTEX(qla_tgt_mutex);
 144 static LIST_HEAD(qla_tgt_glist);
 145
 146 static const char *prot_op_str(u32 prot_op)
 147 {
 148         switch (prot_op) {
 149         case TARGET_PROT_NORMAL:        return "NORMAL";
 150         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 151         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 152         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 153         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 154         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 155         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 156         default:                        return "UNKNOWN";
 157         }
 158 }
 159
 160 /* This API intentionally takes dest as a parameter, rather than returning
 161  * int value to avoid caller forgetting to issue wmb() after the store */
 162 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 163 {
 164         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 165         *dest = atomic_inc_return(&base_vha->generation_tick);
 166         /* memory barrier */
 167         wmb();
 168 }
 169
 170 /* Might release hw lock, then reaquire!! */
 171 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 172 {
 173         /* Send marker if required */
 174         if (unlikely(vha->marker_needed != 0)) {
 175                 int rc = qla2x00_issue_marker(vha, vha_locked);
 176                 if (rc != QLA_SUCCESS) {
 177                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 178                             "qla_target(%d): issue_marker() failed\n",
 179                             vha->vp_idx);
 180                 }
 181                 return rc;
 182         }
 183         return QLA_SUCCESS;
 184 }
 185
 186 static inline
 187 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 188         uint8_t *d_id)
 189 {
 190         struct scsi_qla_host *host;
 191         uint32_t key = 0;
 192
 193         if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
 194             (vha->d_id.b.al_pa == d_id[2]))
 195                 return vha;
 196
 197         key  = (uint32_t)d_id[0] << 16;
 198         key |= (uint32_t)d_id[1] <<  8;
 199         key |= (uint32_t)d_id[2];
 200
 201         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 202         if (!host)
 203                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
 204                            "Unable to find host %06x\n", key);
 205
 206         return host;
 207 }
 208
 209 static inline
 210 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 211         uint16_t vp_idx)
 212 {
 213         struct qla_hw_data *ha = vha->hw;
 214
 215         if (vha->vp_idx == vp_idx)
 216                 return vha;
 217
 218         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 219         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 220                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 221
 222         return NULL;
 223 }
 224
 225 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 226 {
 227         unsigned long flags;
 228
 229         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 230
 231         vha->hw->tgt.num_pend_cmds++;
 232         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 233                 vha->qla_stats.stat_max_pend_cmds =
 234                         vha->hw->tgt.num_pend_cmds;
 235         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 236 }
 237 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 238 {
 239         unsigned long flags;
 240
 241         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 242         vha->hw->tgt.num_pend_cmds--;
 243         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 244 }
 245
 246
 247 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 248         struct atio_from_isp *atio,     uint8_t ha_locked)
 249 {
 250         struct qla_tgt_sess_op *u;
 251         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 252         unsigned long flags;
 253
 254         if (tgt->tgt_stop) {
 255                 ql_dbg(ql_dbg_async, vha, 0xffff,
 256                            "qla_target(%d): dropping unknown ATIO_TYPE7, "
 257                            "because tgt is being stopped", vha->vp_idx);
 258                 goto out_term;
 259         }
 260
 261         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 262         if (u == NULL) {
 263                 ql_dbg(ql_dbg_async, vha, 0xffff,
 264                     "Alloc of struct unknown_atio (size %zd) failed", sizeof(*u));
 265                 /* It should be harmless and on the next retry should work well */
 266                 goto out_term;
 267         }
 268
 269         u->vha = vha;
 270         memcpy(&u->atio, atio, sizeof(*atio));
 271         INIT_LIST_HEAD(&u->cmd_list);
 272
 273         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 274         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 275         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 276
 277         schedule_delayed_work(&vha->unknown_atio_work, 1);
 278
 279 out:
 280         return;
 281
 282 out_term:
 283         qlt_send_term_exchange(vha, NULL, atio, ha_locked, 0);
 284         goto out;
 285 }
 286
 287 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 288         uint8_t ha_locked)
 289 {
 290         struct qla_tgt_sess_op *u, *t;
 291         scsi_qla_host_t *host;
 292         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 293         unsigned long flags;
 294         uint8_t queued = 0;
 295
 296         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 297                 if (u->aborted) {
 298                         ql_dbg(ql_dbg_async, vha, 0xffff,
 299                             "Freeing unknown %s %p, because of Abort",
 300                             "ATIO_TYPE7", u);
 301                         qlt_send_term_exchange(vha, NULL, &u->atio,
 302                             ha_locked, 0);
 303                         goto abort;
 304                 }
 305
 306                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 307                 if (host != NULL) {
 308                         ql_dbg(ql_dbg_async, vha, 0xffff,
 309                                 "Requeuing unknown ATIO_TYPE7 %p", u);
 310                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 311                 } else if (tgt->tgt_stop) {
 312                         ql_dbg(ql_dbg_async, vha, 0xffff,
 313                                 "Freeing unknown %s %p, because tgt is being stopped",
 314                                 "ATIO_TYPE7", u);
 315                         qlt_send_term_exchange(vha, NULL, &u->atio,
 316                             ha_locked, 0);
 317                 } else {
 318                         ql_dbg(ql_dbg_async, vha, 0xffff,
 319                                 "u %p, vha %p, host %p, sched again..", u,
 320                                 vha, host);
 321                         if (!queued) {
 322                                 queued = 1;
 323                                 schedule_delayed_work(&vha->unknown_atio_work,
 324                                     1);
 325                         }
 326                         continue;
 327                 }
 328
 329 abort:
 330                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 331                 list_del(&u->cmd_list);
 332                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 333                 kfree(u);
 334         }
 335 }
 336
 337 void qlt_unknown_atio_work_fn(struct work_struct *work)
 338 {
 339         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 340             struct scsi_qla_host, unknown_atio_work);
 341
 342         qlt_try_to_dequeue_unknown_atios(vha, 0);
 343 }
 344
 345 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 346         struct atio_from_isp *atio, uint8_t ha_locked)
 347 {
 348         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 349                 "%s: qla_target(%d): type %x ox_id %04x\n",
 350                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 351                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 352
 353         switch (atio->u.raw.entry_type) {
 354         case ATIO_TYPE7:
 355         {
 356                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 357                     atio->u.isp24.fcp_hdr.d_id);
 358                 if (unlikely(NULL == host)) {
 359                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 360                             "qla_target(%d): Received ATIO_TYPE7 "
 361                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 362                             atio->u.isp24.fcp_hdr.d_id[0],
 363                             atio->u.isp24.fcp_hdr.d_id[1],
 364                             atio->u.isp24.fcp_hdr.d_id[2]);
 365
 366
 367                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 368                         break;
 369                 }
 370                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 371                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 372
 373                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 374                 break;
 375         }
 376
 377         case IMMED_NOTIFY_TYPE:
 378         {
 379                 struct scsi_qla_host *host = vha;
 380                 struct imm_ntfy_from_isp *entry =
 381                     (struct imm_ntfy_from_isp *)atio;
 382
 383                 if ((entry->u.isp24.vp_index != 0xFF) &&
 384                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 385                         host = qlt_find_host_by_vp_idx(vha,
 386                             entry->u.isp24.vp_index);
 387                         if (unlikely(!host)) {
 388                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 389                                     "qla_target(%d): Received "
 390                                     "ATIO (IMMED_NOTIFY_TYPE) "
 391                                     "with unknown vp_index %d\n",
 392                                     vha->vp_idx, entry->u.isp24.vp_index);
 393                                 break;
 394                         }
 395                 }
 396                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 397                 break;
 398         }
 399
 400         case VP_RPT_ID_IOCB_TYPE:
 401                 qla24xx_report_id_acquisition(vha,
 402                         (struct vp_rpt_id_entry_24xx *)atio);
 403                 break;
 404
 405         case ABTS_RECV_24XX:
 406         {
 407                 struct abts_recv_from_24xx *entry =
 408                         (struct abts_recv_from_24xx *)atio;
 409                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 410                         entry->vp_index);
 411                 unsigned long flags;
 412
 413                 if (unlikely(!host)) {
 414                         ql_dbg(ql_dbg_tgt, vha, 0xffff,
 415                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 416                             "received, with unknown vp_index %d\n",
 417                             vha->vp_idx, entry->vp_index);
 418                         break;
 419                 }
 420                 if (!ha_locked)
 421                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 422                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 423                 if (!ha_locked)
 424                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 425                 break;
 426         }
 427
 428         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 429
 430         default:
 431                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 432                     "qla_target(%d): Received unknown ATIO atio "
 433                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 434                 break;
 435         }
 436
 437         return false;
 438 }
 439
 440 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 441 {
 442         switch (pkt->entry_type) {
 443         case CTIO_CRC2:
 444                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 445                         "qla_target(%d):%s: CRC2 Response pkt\n",
 446                         vha->vp_idx, __func__);
 447         case CTIO_TYPE7:
 448         {
 449                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 450                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 451                     entry->vp_index);
 452                 if (unlikely(!host)) {
 453                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 454                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 455                             "received, with unknown vp_index %d\n",
 456                             vha->vp_idx, entry->vp_index);
 457                         break;
 458                 }
 459                 qlt_response_pkt(host, pkt);
 460                 break;
 461         }
 462
 463         case IMMED_NOTIFY_TYPE:
 464         {
 465                 struct scsi_qla_host *host = vha;
 466                 struct imm_ntfy_from_isp *entry =
 467                     (struct imm_ntfy_from_isp *)pkt;
 468
 469                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 470                 if (unlikely(!host)) {
 471                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 472                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 473                             "received, with unknown vp_index %d\n",
 474                             vha->vp_idx, entry->u.isp24.vp_index);
 475                         break;
 476                 }
 477                 qlt_response_pkt(host, pkt);
 478                 break;
 479         }
 480
 481         case NOTIFY_ACK_TYPE:
 482         {
 483                 struct scsi_qla_host *host = vha;
 484                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 485
 486                 if (0xFF != entry->u.isp24.vp_index) {
 487                         host = qlt_find_host_by_vp_idx(vha,
 488                             entry->u.isp24.vp_index);
 489                         if (unlikely(!host)) {
 490                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 491                                     "qla_target(%d): Response "
 492                                     "pkt (NOTIFY_ACK_TYPE) "
 493                                     "received, with unknown "
 494                                     "vp_index %d\n", vha->vp_idx,
 495                                     entry->u.isp24.vp_index);
 496                                 break;
 497                         }
 498                 }
 499                 qlt_response_pkt(host, pkt);
 500                 break;
 501         }
 502
 503         case ABTS_RECV_24XX:
 504         {
 505                 struct abts_recv_from_24xx *entry =
 506                     (struct abts_recv_from_24xx *)pkt;
 507                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 508                     entry->vp_index);
 509                 if (unlikely(!host)) {
 510                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 511                             "qla_target(%d): Response pkt "
 512                             "(ABTS_RECV_24XX) received, with unknown "
 513                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 514                         break;
 515                 }
 516                 qlt_response_pkt(host, pkt);
 517                 break;
 518         }
 519
 520         case ABTS_RESP_24XX:
 521         {
 522                 struct abts_resp_to_24xx *entry =
 523                     (struct abts_resp_to_24xx *)pkt;
 524                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 525                     entry->vp_index);
 526                 if (unlikely(!host)) {
 527                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 528                             "qla_target(%d): Response pkt "
 529                             "(ABTS_RECV_24XX) received, with unknown "
 530                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 531                         break;
 532                 }
 533                 qlt_response_pkt(host, pkt);
 534                 break;
 535         }
 536
 537         default:
 538                 qlt_response_pkt(vha, pkt);
 539                 break;
 540         }
 541
 542 }
 543
 544 /*
 545  * All qlt_plogi_ack_t operations are protected by hardware_lock
 546  */
 547 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 548         struct imm_ntfy_from_isp *ntfy, int type)
 549 {
 550         struct qla_work_evt *e;
 551         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 552         if (!e)
 553                 return QLA_FUNCTION_FAILED;
 554
 555         e->u.nack.fcport = fcport;
 556         e->u.nack.type = type;
 557         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 558         return qla2x00_post_work(vha, e);
 559 }
 560
 561 static
 562 void qla2x00_async_nack_sp_done(void *s, int res)
 563 {
 564         struct srb *sp = (struct srb *)s;
 565         struct scsi_qla_host *vha = sp->vha;
 566         unsigned long flags;
 567
 568         ql_dbg(ql_dbg_disc, vha, 0xffff,
 569                 "Async done-%s res %x %8phC  type %d\n",
 570                 sp->name, res, sp->fcport->port_name, sp->type);
 571
 572         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 573         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 574         sp->fcport->chip_reset = vha->hw->chip_reset;
 575
 576         switch (sp->type) {
 577         case SRB_NACK_PLOGI:
 578                 sp->fcport->login_gen++;
 579                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 580                 sp->fcport->logout_on_delete = 1;
 581                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 582                 break;
 583
 584         case SRB_NACK_PRLI:
 585                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 586                 sp->fcport->deleted = 0;
 587
 588                 if (!sp->fcport->login_succ &&
 589                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 590                         sp->fcport->login_succ = 1;
 591
 592                         vha->fcport_count++;
 593
 594                         if (!IS_IIDMA_CAPABLE(vha->hw) ||
 595                             !vha->hw->flags.gpsc_supported) {
 596                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
 597                                         "%s %d %8phC post upd_fcport fcp_cnt %d\n",
 598                                         __func__, __LINE__,
 599                                         sp->fcport->port_name,
 600                                         vha->fcport_count);
 601
 602                                 qla24xx_post_upd_fcport_work(vha, sp->fcport);
 603                         } else {
 604                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
 605                                         "%s %d %8phC post gpsc fcp_cnt %d\n",
 606                                         __func__, __LINE__,
 607                                         sp->fcport->port_name,
 608                                         vha->fcport_count);
 609
 610                                 qla24xx_post_gpsc_work(vha, sp->fcport);
 611                         }
 612                 }
 613                 break;
 614
 615         case SRB_NACK_LOGO:
 616                 sp->fcport->login_gen++;
 617                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 618                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 619                 break;
 620         }
 621         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 622
 623         sp->free(sp);
 624 }
 625
 626 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 627         struct imm_ntfy_from_isp *ntfy, int type)
 628 {
 629         int rval = QLA_FUNCTION_FAILED;
 630         srb_t *sp;
 631         char *c = NULL;
 632
 633         fcport->flags |= FCF_ASYNC_SENT;
 634         switch (type) {
 635         case SRB_NACK_PLOGI:
 636                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 637                 c = "PLOGI";
 638                 break;
 639         case SRB_NACK_PRLI:
 640                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 641                 fcport->deleted = 0;
 642                 c = "PRLI";
 643                 break;
 644         case SRB_NACK_LOGO:
 645                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 646                 c = "LOGO";
 647                 break;
 648         }
 649
 650         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 651         if (!sp)
 652                 goto done;
 653
 654         sp->type = type;
 655         sp->name = "nack";
 656
 657         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 658
 659         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 660
 661         sp->done = qla2x00_async_nack_sp_done;
 662
 663         rval = qla2x00_start_sp(sp);
 664         if (rval != QLA_SUCCESS)
 665                 goto done_free_sp;
 666
 667         ql_dbg(ql_dbg_disc, vha, 0xffff,
 668                 "Async-%s %8phC hndl %x %s\n",
 669                 sp->name, fcport->port_name, sp->handle, c);
 670
 671         return rval;
 672
 673 done_free_sp:
 674         sp->free(sp);
 675 done:
 676         fcport->flags &= ~FCF_ASYNC_SENT;
 677         return rval;
 678 }
 679
 680 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 681 {
 682         fc_port_t *t;
 683         unsigned long flags;
 684
 685         switch (e->u.nack.type) {
 686         case SRB_NACK_PRLI:
 687                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 688                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 689                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 690                 if (t) {
 691                         ql_log(ql_log_info, vha, 0xffff,
 692                             "%s create sess success %p", __func__, t);
 693                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 694                         /* create sess has an extra kref */
 695                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 696                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 697                 }
 698                 break;
 699         }
 700         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 701             (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
 702 }
 703
 704 void qla24xx_delete_sess_fn(struct work_struct *work)
 705 {
 706         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 707         struct qla_hw_data *ha = fcport->vha->hw;
 708         unsigned long flags;
 709
 710         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 711
 712         if (fcport->se_sess) {
 713                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 714                 ha->tgt.tgt_ops->put_sess(fcport);
 715         } else {
 716                 qlt_unreg_sess(fcport);
 717         }
 718         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 719 }
 720
 721 /*
 722  * Called from qla2x00_reg_remote_port()
 723  */
 724 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 725 {
 726         struct qla_hw_data *ha = vha->hw;
 727         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 728         struct fc_port *sess = fcport;
 729         unsigned long flags;
 730
 731         if (!vha->hw->tgt.tgt_ops)
 732                 return;
 733
 734         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 735         if (tgt->tgt_stop) {
 736                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 737                 return;
 738         }
 739
 740         if (fcport->disc_state == DSC_DELETE_PEND) {
 741                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 742                 return;
 743         }
 744
 745         if (!sess->se_sess) {
 746                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 747
 748                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 749                 sess = qlt_create_sess(vha, fcport, false);
 750                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 751
 752                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 753         } else {
 754                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 755                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 756                         return;
 757                 }
 758
 759                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 760                         ql_dbg(ql_dbg_disc, vha, 0xffff,
 761                             "%s: kref_get fail sess %8phC \n",
 762                             __func__, sess->port_name);
 763                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 764                         return;
 765                 }
 766
 767                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 768                     "qla_target(%u): %ssession for port %8phC "
 769                     "(loop ID %d) reappeared\n", vha->vp_idx,
 770                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 771
 772                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 773                     "Reappeared sess %p\n", sess);
 774
 775                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 776                     fcport->loop_id,
 777                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 778         }
 779
 780         if (sess && sess->local) {
 781                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 782                     "qla_target(%u): local session for "
 783                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 784                     fcport->port_name, sess->loop_id);
 785                 sess->local = 0;
 786         }
 787         ha->tgt.tgt_ops->put_sess(sess);
 788         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 789 }
 790
 791 /*
 792  * This is a zero-base ref-counting solution, since hardware_lock
 793  * guarantees that ref_count is not modified concurrently.
 794  * Upon successful return content of iocb is undefined
 795  */
 796 static struct qlt_plogi_ack_t *
 797 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 798                        struct imm_ntfy_from_isp *iocb)
 799 {
 800         struct qlt_plogi_ack_t *pla;
 801
 802         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 803                 if (pla->id.b24 == id->b24) {
 804                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 805                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 806                         return pla;
 807                 }
 808         }
 809
 810         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 811         if (!pla) {
 812                 ql_dbg(ql_dbg_async, vha, 0x5088,
 813                        "qla_target(%d): Allocation of plogi_ack failed\n",
 814                        vha->vp_idx);
 815                 return NULL;
 816         }
 817
 818         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 819         pla->id = *id;
 820         list_add_tail(&pla->list, &vha->plogi_ack_list);
 821
 822         return pla;
 823 }
 824
 825 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 826     struct qlt_plogi_ack_t *pla)
 827 {
 828         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 829         port_id_t port_id;
 830         uint16_t loop_id;
 831         fc_port_t *fcport = pla->fcport;
 832
 833         BUG_ON(!pla->ref_count);
 834         pla->ref_count--;
 835
 836         if (pla->ref_count)
 837                 return;
 838
 839         ql_dbg(ql_dbg_disc, vha, 0x5089,
 840             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 841             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 842             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 843             iocb->u.isp24.port_id[0],
 844             le16_to_cpu(iocb->u.isp24.nport_handle),
 845             iocb->u.isp24.exchange_address, iocb->ox_id);
 846
 847         port_id.b.domain = iocb->u.isp24.port_id[2];
 848         port_id.b.area   = iocb->u.isp24.port_id[1];
 849         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 850         port_id.b.rsvd_1 = 0;
 851
 852         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 853
 854         fcport->loop_id = loop_id;
 855         fcport->d_id = port_id;
 856         qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 857
 858         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 859                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 860                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 861                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 862                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 863         }
 864
 865         list_del(&pla->list);
 866         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 867 }
 868
 869 void
 870 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 871     struct fc_port *sess, enum qlt_plogi_link_t link)
 872 {
 873         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 874         /* Inc ref_count first because link might already be pointing at pla */
 875         pla->ref_count++;
 876
 877         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 878                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 879                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 880                 sess, link, sess->port_name,
 881                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 882                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 883                 pla->ref_count, pla, link);
 884
 885         if (sess->plogi_link[link])
 886                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 887
 888         if (link == QLT_PLOGI_LINK_SAME_WWN)
 889                 pla->fcport = sess;
 890
 891         sess->plogi_link[link] = pla;
 892 }
 893
 894 typedef struct {
 895         /* These fields must be initialized by the caller */
 896         port_id_t id;
 897         /*
 898          * number of cmds dropped while we were waiting for
 899          * initiator to ack LOGO initialize to 1 if LOGO is
 900          * triggered by a command, otherwise, to 0
 901          */
 902         int cmd_count;
 903
 904         /* These fields are used by callee */
 905         struct list_head list;
 906 } qlt_port_logo_t;
 907
 908 static void
 909 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 910 {
 911         qlt_port_logo_t *tmp;
 912         int res;
 913
 914         mutex_lock(&vha->vha_tgt.tgt_mutex);
 915
 916         list_for_each_entry(tmp, &vha->logo_list, list) {
 917                 if (tmp->id.b24 == logo->id.b24) {
 918                         tmp->cmd_count += logo->cmd_count;
 919                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 920                         return;
 921                 }
 922         }
 923
 924         list_add_tail(&logo->list, &vha->logo_list);
 925
 926         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 927
 928         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 929
 930         mutex_lock(&vha->vha_tgt.tgt_mutex);
 931         list_del(&logo->list);
 932         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 933
 934         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 935             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 936             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 937             logo->cmd_count, res);
 938 }
 939
 940 static void qlt_free_session_done(struct work_struct *work)
 941 {
 942         struct fc_port *sess = container_of(work, struct fc_port,
 943             free_work);
 944         struct qla_tgt *tgt = sess->tgt;
 945         struct scsi_qla_host *vha = sess->vha;
 946         struct qla_hw_data *ha = vha->hw;
 947         unsigned long flags;
 948         bool logout_started = false;
 949         struct event_arg ea;
 950         scsi_qla_host_t *base_vha;
 951
 952         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 953                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 954                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 955                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 956                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 957                 sess->logout_on_delete, sess->keep_nport_handle,
 958                 sess->send_els_logo);
 959
 960
 961         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 962                 if (sess->send_els_logo) {
 963                         qlt_port_logo_t logo;
 964
 965                         logo.id = sess->d_id;
 966                         logo.cmd_count = 0;
 967                         qlt_send_first_logo(vha, &logo);
 968                 }
 969
 970                 if (sess->logout_on_delete) {
 971                         int rc;
 972
 973                         rc = qla2x00_post_async_logout_work(vha, sess, NULL);
 974                         if (rc != QLA_SUCCESS)
 975                                 ql_log(ql_log_warn, vha, 0xf085,
 976                                     "Schedule logo failed sess %p rc %d\n",
 977                                     sess, rc);
 978                         else
 979                                 logout_started = true;
 980                 }
 981         }
 982
 983         /*
 984          * Release the target session for FC Nexus from fabric module code.
 985          */
 986         if (sess->se_sess != NULL)
 987                 ha->tgt.tgt_ops->free_session(sess);
 988
 989         if (logout_started) {
 990                 bool traced = false;
 991
 992                 while (!ACCESS_ONCE(sess->logout_completed)) {
 993                         if (!traced) {
 994                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
 995                                         "%s: waiting for sess %p logout\n",
 996                                         __func__, sess);
 997                                 traced = true;
 998                         }
 999                         msleep(100);
1000                 }
1001
1002                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1003                     "%s: sess %p logout completed\n",__func__, sess);
1004         }
1005
1006         if (sess->logo_ack_needed) {
1007                 sess->logo_ack_needed = 0;
1008                 qla24xx_async_notify_ack(vha, sess,
1009                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1010         }
1011
1012         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1013         if (sess->se_sess) {
1014                 sess->se_sess = NULL;
1015                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1016                         tgt->sess_count--;
1017         }
1018
1019         sess->disc_state = DSC_DELETED;
1020         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1021         sess->deleted = QLA_SESS_DELETED;
1022         sess->login_retry = vha->hw->login_retry_count;
1023
1024         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1025                 vha->fcport_count--;
1026                 sess->login_succ = 0;
1027         }
1028
1029         if (sess->chip_reset != sess->vha->hw->chip_reset)
1030                 qla2x00_clear_loop_id(sess);
1031
1032         if (sess->conflict) {
1033                 sess->conflict->login_pause = 0;
1034                 sess->conflict = NULL;
1035                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1036                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1037         }
1038
1039         {
1040                 struct qlt_plogi_ack_t *own =
1041                     sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1042                 struct qlt_plogi_ack_t *con =
1043                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1044                 struct imm_ntfy_from_isp *iocb;
1045
1046                 if (con) {
1047                         iocb = &con->iocb;
1048                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1049                                  "se_sess %p / sess %p port %8phC is gone,"
1050                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1051                                  sess->se_sess, sess, sess->port_name,
1052                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1053                                  own ? own->ref_count : -1,
1054                                  iocb->u.isp24.port_name, con->ref_count);
1055                         qlt_plogi_ack_unref(vha, con);
1056                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1057                 } else {
1058                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1059                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1060                             sess->se_sess, sess, sess->port_name,
1061                             own ? "releasing own PLOGI" :
1062                             "no own PLOGI pending",
1063                             own ? own->ref_count : -1);
1064                 }
1065
1066                 if (own) {
1067                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1068                         qlt_plogi_ack_unref(vha, own);
1069                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1070                 }
1071         }
1072         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1073
1074         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1075             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1076                 sess, sess->port_name, vha->fcport_count);
1077
1078         if (tgt && (tgt->sess_count == 0))
1079                 wake_up_all(&tgt->waitQ);
1080
1081         if (vha->fcport_count == 0)
1082                 wake_up_all(&vha->fcport_waitQ);
1083
1084         base_vha = pci_get_drvdata(ha->pdev);
1085         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1086                 return;
1087
1088         if (!tgt || !tgt->tgt_stop) {
1089                 memset(&ea, 0, sizeof(ea));
1090                 ea.event = FCME_DELETE_DONE;
1091                 ea.fcport = sess;
1092                 qla2x00_fcport_event_handler(vha, &ea);
1093         }
1094 }
1095
1096 /* ha->tgt.sess_lock supposed to be held on entry */
1097 void qlt_unreg_sess(struct fc_port *sess)
1098 {
1099         struct scsi_qla_host *vha = sess->vha;
1100
1101         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1102             "%s sess %p for deletion %8phC\n",
1103             __func__, sess, sess->port_name);
1104
1105         if (sess->se_sess)
1106                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1107
1108         qla2x00_mark_device_lost(vha, sess, 1, 1);
1109
1110         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1111         sess->disc_state = DSC_DELETE_PEND;
1112         sess->last_rscn_gen = sess->rscn_gen;
1113         sess->last_login_gen = sess->login_gen;
1114
1115         INIT_WORK(&sess->free_work, qlt_free_session_done);
1116         schedule_work(&sess->free_work);
1117 }
1118 EXPORT_SYMBOL(qlt_unreg_sess);
1119
1120 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1121 {
1122         struct qla_hw_data *ha = vha->hw;
1123         struct fc_port *sess = NULL;
1124         uint16_t loop_id;
1125         int res = 0;
1126         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1127         unsigned long flags;
1128
1129         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1130         if (loop_id == 0xFFFF) {
1131                 /* Global event */
1132                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1133                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1134                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1135                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1136         } else {
1137                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1138                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1139                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1140         }
1141
1142         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1143             "Using sess for qla_tgt_reset: %p\n", sess);
1144         if (!sess) {
1145                 res = -ESRCH;
1146                 return res;
1147         }
1148
1149         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1150             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1151             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1152             mcmd, loop_id);
1153
1154         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1155 }
1156
1157 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1158 {
1159         if (sess->chip_reset != sess->vha->hw->chip_reset) {
1160                 sess->logout_on_delete = 0;
1161                 sess->logo_ack_needed = 0;
1162                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1163                 sess->scan_state = 0;
1164         }
1165 }
1166
1167 /* ha->tgt.sess_lock supposed to be held on entry */
1168 void qlt_schedule_sess_for_deletion(struct fc_port *sess,
1169         bool immediate)
1170 {
1171         struct qla_tgt *tgt = sess->tgt;
1172
1173         if (sess->disc_state == DSC_DELETE_PEND)
1174                 return;
1175
1176         if (sess->disc_state == DSC_DELETED) {
1177                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1178                         wake_up_all(&tgt->waitQ);
1179                 if (sess->vha->fcport_count == 0)
1180                         wake_up_all(&sess->vha->fcport_waitQ);
1181
1182                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1183                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1184                         return;
1185         }
1186
1187         sess->disc_state = DSC_DELETE_PEND;
1188
1189         if (sess->deleted == QLA_SESS_DELETED)
1190                 sess->logout_on_delete = 0;
1191
1192         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1193         qla24xx_chk_fcp_state(sess);
1194
1195         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1196             "Scheduling sess %p for deletion\n", sess);
1197
1198         schedule_work(&sess->del_work);
1199 }
1200
1201 void qlt_schedule_sess_for_deletion_lock(struct fc_port *sess)
1202 {
1203         unsigned long flags;
1204         struct qla_hw_data *ha = sess->vha->hw;
1205         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1206         qlt_schedule_sess_for_deletion(sess, 1);
1207         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1208 }
1209
1210 /* ha->tgt.sess_lock supposed to be held on entry */
1211 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1212 {
1213         struct fc_port *sess;
1214         scsi_qla_host_t *vha = tgt->vha;
1215
1216         list_for_each_entry(sess, &vha->vp_fcports, list) {
1217                 if (sess->se_sess)
1218                         qlt_schedule_sess_for_deletion(sess, 1);
1219         }
1220
1221         /* At this point tgt could be already dead */
1222 }
1223
1224 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1225         uint16_t *loop_id)
1226 {
1227         struct qla_hw_data *ha = vha->hw;
1228         dma_addr_t gid_list_dma;
1229         struct gid_list_info *gid_list;
1230         char *id_iter;
1231         int res, rc, i;
1232         uint16_t entries;
1233
1234         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1235             &gid_list_dma, GFP_KERNEL);
1236         if (!gid_list) {
1237                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1238                     "qla_target(%d): DMA Alloc failed of %u\n",
1239                     vha->vp_idx, qla2x00_gid_list_size(ha));
1240                 return -ENOMEM;
1241         }
1242
1243         /* Get list of logged in devices */
1244         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1245         if (rc != QLA_SUCCESS) {
1246                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1247                     "qla_target(%d): get_id_list() failed: %x\n",
1248                     vha->vp_idx, rc);
1249                 res = -EBUSY;
1250                 goto out_free_id_list;
1251         }
1252
1253         id_iter = (char *)gid_list;
1254         res = -ENOENT;
1255         for (i = 0; i < entries; i++) {
1256                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1257                 if ((gid->al_pa == s_id[2]) &&
1258                     (gid->area == s_id[1]) &&
1259                     (gid->domain == s_id[0])) {
1260                         *loop_id = le16_to_cpu(gid->loop_id);
1261                         res = 0;
1262                         break;
1263                 }
1264                 id_iter += ha->gid_list_info_size;
1265         }
1266
1267 out_free_id_list:
1268         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1269             gid_list, gid_list_dma);
1270         return res;
1271 }
1272
1273 /*
1274  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1275  * Caller must put it.
1276  */
1277 static struct fc_port *qlt_create_sess(
1278         struct scsi_qla_host *vha,
1279         fc_port_t *fcport,
1280         bool local)
1281 {
1282         struct qla_hw_data *ha = vha->hw;
1283         struct fc_port *sess = fcport;
1284         unsigned long flags;
1285
1286         if (vha->vha_tgt.qla_tgt->tgt_stop)
1287                 return NULL;
1288
1289         if (fcport->se_sess) {
1290                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1291                         ql_dbg(ql_dbg_disc, vha, 0xffff,
1292                             "%s: kref_get_unless_zero failed for %8phC\n",
1293                             __func__, sess->port_name);
1294                         return NULL;
1295                 }
1296                 return fcport;
1297         }
1298         sess->tgt = vha->vha_tgt.qla_tgt;
1299         sess->local = local;
1300
1301         /*
1302          * Under normal circumstances we want to logout from firmware when
1303          * session eventually ends and release corresponding nport handle.
1304          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1305          * code will adjust these flags as necessary.
1306          */
1307         sess->logout_on_delete = 1;
1308         sess->keep_nport_handle = 0;
1309         sess->logout_completed = 0;
1310
1311         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1312             &fcport->port_name[0], sess) < 0) {
1313                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
1314                     "(%d) %8phC check_initiator_node_acl failed\n",
1315                     vha->vp_idx, fcport->port_name);
1316                 return NULL;
1317         } else {
1318                 kref_init(&fcport->sess_kref);
1319                 /*
1320                  * Take an extra reference to ->sess_kref here to handle
1321                  * fc_port access across ->tgt.sess_lock reaquire.
1322                  */
1323                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1324                         ql_dbg(ql_dbg_disc, vha, 0xffff,
1325                             "%s: kref_get_unless_zero failed for %8phC\n",
1326                             __func__, sess->port_name);
1327                         return NULL;
1328                 }
1329
1330                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1331                 if (!IS_SW_RESV_ADDR(sess->d_id))
1332                         vha->vha_tgt.qla_tgt->sess_count++;
1333
1334                 qlt_do_generation_tick(vha, &sess->generation);
1335                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1336         }
1337
1338         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1339             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1340             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1341             vha->vha_tgt.qla_tgt->sess_count);
1342
1343         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1344             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1345             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1346             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1347             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1348             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1349
1350         return sess;
1351 }
1352
1353 /*
1354  * max_gen - specifies maximum session generation
1355  * at which this deletion requestion is still valid
1356  */
1357 void
1358 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1359 {
1360         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1361         struct fc_port *sess = fcport;
1362         unsigned long flags;
1363
1364         if (!vha->hw->tgt.tgt_ops)
1365                 return;
1366
1367         if (!tgt)
1368                 return;
1369
1370         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1371         if (tgt->tgt_stop) {
1372                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1373                 return;
1374         }
1375         if (!sess->se_sess) {
1376                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1377                 return;
1378         }
1379
1380         if (max_gen - sess->generation < 0) {
1381                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1382                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1383                     "Ignoring stale deletion request for se_sess %p / sess %p"
1384                     " for port %8phC, req_gen %d, sess_gen %d\n",
1385                     sess->se_sess, sess, sess->port_name, max_gen,
1386                     sess->generation);
1387                 return;
1388         }
1389
1390         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1391
1392         sess->local = 1;
1393         qlt_schedule_sess_for_deletion(sess, false);
1394         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1395 }
1396
1397 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1398 {
1399         struct qla_hw_data *ha = tgt->ha;
1400         unsigned long flags;
1401         int res;
1402         /*
1403          * We need to protect against race, when tgt is freed before or
1404          * inside wake_up()
1405          */
1406         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1407         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1408             "tgt %p, sess_count=%d\n",
1409             tgt, tgt->sess_count);
1410         res = (tgt->sess_count == 0);
1411         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1412
1413         return res;
1414 }
1415
1416 /* Called by tcm_qla2xxx configfs code */
1417 int qlt_stop_phase1(struct qla_tgt *tgt)
1418 {
1419         struct scsi_qla_host *vha = tgt->vha;
1420         struct qla_hw_data *ha = tgt->ha;
1421         unsigned long flags;
1422
1423         mutex_lock(&qla_tgt_mutex);
1424         if (!vha->fc_vport) {
1425                 struct Scsi_Host *sh = vha->host;
1426                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1427                 bool npiv_vports;
1428
1429                 spin_lock_irqsave(sh->host_lock, flags);
1430                 npiv_vports = (fc_host->npiv_vports_inuse);
1431                 spin_unlock_irqrestore(sh->host_lock, flags);
1432
1433                 if (npiv_vports) {
1434                         mutex_unlock(&qla_tgt_mutex);
1435                         return -EPERM;
1436                 }
1437         }
1438         if (tgt->tgt_stop || tgt->tgt_stopped) {
1439                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1440                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1441                 mutex_unlock(&qla_tgt_mutex);
1442                 return -EPERM;
1443         }
1444
1445         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1446             vha->host_no, vha);
1447         /*
1448          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1449          * Lock is needed, because we still can get an incoming packet.
1450          */
1451         mutex_lock(&vha->vha_tgt.tgt_mutex);
1452         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1453         tgt->tgt_stop = 1;
1454         qlt_clear_tgt_db(tgt);
1455         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1456         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1457         mutex_unlock(&qla_tgt_mutex);
1458
1459         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1460             "Waiting for sess works (tgt %p)", tgt);
1461         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1462         while (!list_empty(&tgt->sess_works_list)) {
1463                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1464                 flush_scheduled_work();
1465                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1466         }
1467         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1468
1469         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1470             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1471
1472         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1473
1474         /* Big hammer */
1475         if (!ha->flags.host_shutting_down &&
1476             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1477                 qlt_disable_vha(vha);
1478
1479         /* Wait for sessions to clear out (just in case) */
1480         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1481         return 0;
1482 }
1483 EXPORT_SYMBOL(qlt_stop_phase1);
1484
1485 /* Called by tcm_qla2xxx configfs code */
1486 void qlt_stop_phase2(struct qla_tgt *tgt)
1487 {
1488         struct qla_hw_data *ha = tgt->ha;
1489         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1490         unsigned long flags;
1491
1492         if (tgt->tgt_stopped) {
1493                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1494                     "Already in tgt->tgt_stopped state\n");
1495                 dump_stack();
1496                 return;
1497         }
1498
1499         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1500             "Waiting for %d IRQ commands to complete (tgt %p)",
1501             tgt->irq_cmd_count, tgt);
1502
1503         mutex_lock(&vha->vha_tgt.tgt_mutex);
1504         spin_lock_irqsave(&ha->hardware_lock, flags);
1505         while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
1506                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1507                 udelay(2);
1508                 spin_lock_irqsave(&ha->hardware_lock, flags);
1509         }
1510         tgt->tgt_stop = 0;
1511         tgt->tgt_stopped = 1;
1512         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1513         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1514
1515         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1516             tgt);
1517 }
1518 EXPORT_SYMBOL(qlt_stop_phase2);
1519
1520 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1521 static void qlt_release(struct qla_tgt *tgt)
1522 {
1523         scsi_qla_host_t *vha = tgt->vha;
1524
1525         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1526                 qlt_stop_phase2(tgt);
1527
1528         vha->vha_tgt.qla_tgt = NULL;
1529
1530         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1531             "Release of tgt %p finished\n", tgt);
1532
1533         kfree(tgt);
1534 }
1535
1536 /* ha->hardware_lock supposed to be held on entry */
1537 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1538         const void *param, unsigned int param_size)
1539 {
1540         struct qla_tgt_sess_work_param *prm;
1541         unsigned long flags;
1542
1543         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1544         if (!prm) {
1545                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1546                     "qla_target(%d): Unable to create session "
1547                     "work, command will be refused", 0);
1548                 return -ENOMEM;
1549         }
1550
1551         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1552             "Scheduling work (type %d, prm %p)"
1553             " to find session for param %p (size %d, tgt %p)\n",
1554             type, prm, param, param_size, tgt);
1555
1556         prm->type = type;
1557         memcpy(&prm->tm_iocb, param, param_size);
1558
1559         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1560         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1561         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1562
1563         schedule_work(&tgt->sess_work);
1564
1565         return 0;
1566 }
1567
1568 /*
1569  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1570  */
1571 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1572         struct imm_ntfy_from_isp *ntfy,
1573         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1574         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1575 {
1576         struct qla_hw_data *ha = vha->hw;
1577         request_t *pkt;
1578         struct nack_to_isp *nack;
1579
1580         if (!ha->flags.fw_started)
1581                 return;
1582
1583         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1584
1585         /* Send marker if required */
1586         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1587                 return;
1588
1589         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1590         if (!pkt) {
1591                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1592                     "qla_target(%d): %s failed: unable to allocate "
1593                     "request packet\n", vha->vp_idx, __func__);
1594                 return;
1595         }
1596
1597         if (vha->vha_tgt.qla_tgt != NULL)
1598                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1599
1600         pkt->entry_type = NOTIFY_ACK_TYPE;
1601         pkt->entry_count = 1;
1602
1603         nack = (struct nack_to_isp *)pkt;
1604         nack->ox_id = ntfy->ox_id;
1605
1606         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1607         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1608         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1609                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1610                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1611         }
1612         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1613         nack->u.isp24.status = ntfy->u.isp24.status;
1614         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1615         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1616         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1617         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1618         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1619         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1620         nack->u.isp24.srr_reject_code = srr_reject_code;
1621         nack->u.isp24.srr_reject_code_expl = srr_explan;
1622         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1623
1624         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1625             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1626             vha->vp_idx, nack->u.isp24.status);
1627
1628         /* Memory Barrier */
1629         wmb();
1630         qla2x00_start_iocbs(vha, vha->req);
1631 }
1632
1633 /*
1634  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1635  */
1636 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1637         struct abts_recv_from_24xx *abts, uint32_t status,
1638         bool ids_reversed)
1639 {
1640         struct qla_hw_data *ha = vha->hw;
1641         struct abts_resp_to_24xx *resp;
1642         uint32_t f_ctl;
1643         uint8_t *p;
1644
1645         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1646             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1647             ha, abts, status);
1648
1649         /* Send marker if required */
1650         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1651                 return;
1652
1653         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1654         if (!resp) {
1655                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1656                     "qla_target(%d): %s failed: unable to allocate "
1657                     "request packet", vha->vp_idx, __func__);
1658                 return;
1659         }
1660
1661         resp->entry_type = ABTS_RESP_24XX;
1662         resp->entry_count = 1;
1663         resp->nport_handle = abts->nport_handle;
1664         resp->vp_index = vha->vp_idx;
1665         resp->sof_type = abts->sof_type;
1666         resp->exchange_address = abts->exchange_address;
1667         resp->fcp_hdr_le = abts->fcp_hdr_le;
1668         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1669             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1670             F_CTL_SEQ_INITIATIVE);
1671         p = (uint8_t *)&f_ctl;
1672         resp->fcp_hdr_le.f_ctl[0] = *p++;
1673         resp->fcp_hdr_le.f_ctl[1] = *p++;
1674         resp->fcp_hdr_le.f_ctl[2] = *p;
1675         if (ids_reversed) {
1676                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1677                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1678                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1679                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1680                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1681                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1682         } else {
1683                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1684                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1685                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1686                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1687                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1688                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1689         }
1690         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1691         if (status == FCP_TMF_CMPL) {
1692                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1693                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1694                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1695                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1696                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1697                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1698         } else {
1699                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1700                 resp->payload.ba_rjt.reason_code =
1701                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1702                 /* Other bytes are zero */
1703         }
1704
1705         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1706
1707         /* Memory Barrier */
1708         wmb();
1709         qla2x00_start_iocbs(vha, vha->req);
1710 }
1711
1712 /*
1713  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1714  */
1715 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1716         struct abts_resp_from_24xx_fw *entry)
1717 {
1718         struct ctio7_to_24xx *ctio;
1719
1720         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1721             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1722         /* Send marker if required */
1723         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1724                 return;
1725
1726         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1727         if (ctio == NULL) {
1728                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1729                     "qla_target(%d): %s failed: unable to allocate "
1730                     "request packet\n", vha->vp_idx, __func__);
1731                 return;
1732         }
1733
1734         /*
1735          * We've got on entrance firmware's response on by us generated
1736          * ABTS response. So, in it ID fields are reversed.
1737          */
1738
1739         ctio->entry_type = CTIO_TYPE7;
1740         ctio->entry_count = 1;
1741         ctio->nport_handle = entry->nport_handle;
1742         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1743         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1744         ctio->vp_index = vha->vp_idx;
1745         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1746         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1747         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1748         ctio->exchange_addr = entry->exchange_addr_to_abort;
1749         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1750                                             CTIO7_FLAGS_TERMINATE);
1751         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1752
1753         /* Memory Barrier */
1754         wmb();
1755         qla2x00_start_iocbs(vha, vha->req);
1756
1757         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1758             FCP_TMF_CMPL, true);
1759 }
1760
1761 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1762 {
1763         struct qla_tgt_sess_op *op;
1764         struct qla_tgt_cmd *cmd;
1765
1766         spin_lock(&vha->cmd_list_lock);
1767
1768         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1769                 if (tag == op->atio.u.isp24.exchange_addr) {
1770                         op->aborted = true;
1771                         spin_unlock(&vha->cmd_list_lock);
1772                         return 1;
1773                 }
1774         }
1775
1776         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1777                 if (tag == op->atio.u.isp24.exchange_addr) {
1778                         op->aborted = true;
1779                         spin_unlock(&vha->cmd_list_lock);
1780                         return 1;
1781                 }
1782         }
1783
1784         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1785                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1786                         cmd->aborted = 1;
1787                         spin_unlock(&vha->cmd_list_lock);
1788                         return 1;
1789                 }
1790         }
1791
1792         spin_unlock(&vha->cmd_list_lock);
1793         return 0;
1794 }
1795
1796 /* drop cmds for the given lun
1797  * XXX only looks for cmds on the port through which lun reset was recieved
1798  * XXX does not go through the list of other port (which may have cmds
1799  *     for the same lun)
1800  */
1801 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1802                                 uint32_t lun, uint8_t *s_id)
1803 {
1804         struct qla_tgt_sess_op *op;
1805         struct qla_tgt_cmd *cmd;
1806         uint32_t key;
1807
1808         key = sid_to_key(s_id);
1809         spin_lock(&vha->cmd_list_lock);
1810         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1811                 uint32_t op_key;
1812                 uint32_t op_lun;
1813
1814                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1815                 op_lun = scsilun_to_int(
1816                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1817                 if (op_key == key && op_lun == lun)
1818                         op->aborted = true;
1819         }
1820
1821         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1822                 uint32_t op_key;
1823                 u64 op_lun;
1824
1825                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1826                 op_lun = scsilun_to_int(
1827                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1828                 if (op_key == key && op_lun == lun)
1829                         op->aborted = true;
1830         }
1831
1832         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1833                 uint32_t cmd_key;
1834                 uint32_t cmd_lun;
1835
1836                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1837                 cmd_lun = scsilun_to_int(
1838                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1839                 if (cmd_key == key && cmd_lun == lun)
1840                         cmd->aborted = 1;
1841         }
1842         spin_unlock(&vha->cmd_list_lock);
1843 }
1844
1845 /* ha->hardware_lock supposed to be held on entry */
1846 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1847         struct abts_recv_from_24xx *abts, struct fc_port *sess)
1848 {
1849         struct qla_hw_data *ha = vha->hw;
1850         struct se_session *se_sess = sess->se_sess;
1851         struct qla_tgt_mgmt_cmd *mcmd;
1852         struct se_cmd *se_cmd;
1853         u32 lun = 0;
1854         int rc;
1855         bool found_lun = false;
1856         unsigned long flags;
1857
1858         spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
1859         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1860                 struct qla_tgt_cmd *cmd =
1861                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1862                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1863                         lun = cmd->unpacked_lun;
1864                         found_lun = true;
1865                         break;
1866                 }
1867         }
1868         spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
1869
1870         /* cmd not in LIO lists, look in qla list */
1871         if (!found_lun) {
1872                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1873                         /* send TASK_ABORT response immediately */
1874                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1875                         return 0;
1876                 } else {
1877                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1878                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1879                             abts->exchange_addr_to_abort);
1880                         return -ENOENT;
1881                 }
1882         }
1883
1884         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1885             "qla_target(%d): task abort (tag=%d)\n",
1886             vha->vp_idx, abts->exchange_addr_to_abort);
1887
1888         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1889         if (mcmd == NULL) {
1890                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1891                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1892                     vha->vp_idx, __func__);
1893                 return -ENOMEM;
1894         }
1895         memset(mcmd, 0, sizeof(*mcmd));
1896
1897         mcmd->sess = sess;
1898         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1899         mcmd->reset_count = vha->hw->chip_reset;
1900         mcmd->tmr_func = QLA_TGT_ABTS;
1901
1902         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func,
1903             abts->exchange_addr_to_abort);
1904         if (rc != 0) {
1905                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1906                     "qla_target(%d):  tgt_ops->handle_tmr()"
1907                     " failed: %d", vha->vp_idx, rc);
1908                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1909                 return -EFAULT;
1910         }
1911
1912         return 0;
1913 }
1914
1915 /*
1916  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1917  */
1918 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1919         struct abts_recv_from_24xx *abts)
1920 {
1921         struct qla_hw_data *ha = vha->hw;
1922         struct fc_port *sess;
1923         uint32_t tag = abts->exchange_addr_to_abort;
1924         uint8_t s_id[3];
1925         int rc;
1926         unsigned long flags;
1927
1928         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1929                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1930                     "qla_target(%d): ABTS: Abort Sequence not "
1931                     "supported\n", vha->vp_idx);
1932                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1933                 return;
1934         }
1935
1936         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1937                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1938                     "qla_target(%d): ABTS: Unknown Exchange "
1939                     "Address received\n", vha->vp_idx);
1940                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1941                 return;
1942         }
1943
1944         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1945             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1946             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1947             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1948             le32_to_cpu(abts->fcp_hdr_le.parameter));
1949
1950         s_id[0] = abts->fcp_hdr_le.s_id[2];
1951         s_id[1] = abts->fcp_hdr_le.s_id[1];
1952         s_id[2] = abts->fcp_hdr_le.s_id[0];
1953
1954         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1955         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1956         if (!sess) {
1957                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1958                     "qla_target(%d): task abort for non-existant session\n",
1959                     vha->vp_idx);
1960                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1961                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1962
1963                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1964
1965                 if (rc != 0) {
1966                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1967                             false);
1968                 }
1969                 return;
1970         }
1971         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1972
1973
1974         if (sess->deleted) {
1975                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1976                 return;
1977         }
1978
1979         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1980         if (rc != 0) {
1981                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1982                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1983                     vha->vp_idx, rc);
1984                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1985                 return;
1986         }
1987 }
1988
1989 /*
1990  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1991  */
1992 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1993         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1994 {
1995         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1996         struct ctio7_to_24xx *ctio;
1997         uint16_t temp;
1998
1999         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2000             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2001             ha, atio, resp_code);
2002
2003         /* Send marker if required */
2004         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
2005                 return;
2006
2007         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
2008         if (ctio == NULL) {
2009                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2010                     "qla_target(%d): %s failed: unable to allocate "
2011                     "request packet\n", ha->vp_idx, __func__);
2012                 return;
2013         }
2014
2015         ctio->entry_type = CTIO_TYPE7;
2016         ctio->entry_count = 1;
2017         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2018         ctio->nport_handle = mcmd->sess->loop_id;
2019         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2020         ctio->vp_index = ha->vp_idx;
2021         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2022         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2023         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2024         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2025         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
2026             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
2027         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2028         ctio->u.status1.ox_id = cpu_to_le16(temp);
2029         ctio->u.status1.scsi_status =
2030             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2031         ctio->u.status1.response_len = cpu_to_le16(8);
2032         ctio->u.status1.sense_data[0] = resp_code;
2033
2034         /* Memory Barrier */
2035         wmb();
2036         qla2x00_start_iocbs(ha, ha->req);
2037 }
2038
2039 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2040 {
2041         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2042 }
2043 EXPORT_SYMBOL(qlt_free_mcmd);
2044
2045 /*
2046  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2047  * reacquire
2048  */
2049 void qlt_send_resp_ctio(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
2050     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2051 {
2052         struct atio_from_isp *atio = &cmd->atio;
2053         struct ctio7_to_24xx *ctio;
2054         uint16_t temp;
2055
2056         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2057             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2058             "sense_key=%02x, asc=%02x, ascq=%02x",
2059             vha, atio, scsi_status, sense_key, asc, ascq);
2060
2061         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2062         if (!ctio) {
2063                 ql_dbg(ql_dbg_async, vha, 0x3067,
2064                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2065                     vha->host_no, __func__);
2066                 goto out;
2067         }
2068
2069         ctio->entry_type = CTIO_TYPE7;
2070         ctio->entry_count = 1;
2071         ctio->handle = QLA_TGT_SKIP_HANDLE;
2072         ctio->nport_handle = cmd->sess->loop_id;
2073         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2074         ctio->vp_index = vha->vp_idx;
2075         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2076         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2077         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2078         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2079         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
2080             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
2081         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2082         ctio->u.status1.ox_id = cpu_to_le16(temp);
2083         ctio->u.status1.scsi_status =
2084             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2085         ctio->u.status1.response_len = cpu_to_le16(18);
2086         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2087
2088         if (ctio->u.status1.residual != 0)
2089                 ctio->u.status1.scsi_status |=
2090                     cpu_to_le16(SS_RESIDUAL_UNDER);
2091
2092         /* Response code and sense key */
2093         put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
2094             (&ctio->u.status1.sense_data)[0]);
2095         /* Additional sense length */
2096         put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
2097         /* ASC and ASCQ */
2098         put_unaligned_le32(((asc << 24) | (ascq << 16)),
2099             (&ctio->u.status1.sense_data)[3]);
2100
2101         /* Memory Barrier */
2102         wmb();
2103
2104         qla2x00_start_iocbs(vha, vha->req);
2105 out:
2106         return;
2107 }
2108
2109 /* callback from target fabric module code */
2110 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2111 {
2112         struct scsi_qla_host *vha = mcmd->sess->vha;
2113         struct qla_hw_data *ha = vha->hw;
2114         unsigned long flags;
2115
2116         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2117             "TM response mcmd (%p) status %#x state %#x",
2118             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2119
2120         spin_lock_irqsave(&ha->hardware_lock, flags);
2121
2122         if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
2123                 /*
2124                  * Either the port is not online or this request was from
2125                  * previous life, just abort the processing.
2126                  */
2127                 ql_dbg(ql_dbg_async, vha, 0xe100,
2128                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2129                         vha->flags.online, qla2x00_reset_active(vha),
2130                         mcmd->reset_count, ha->chip_reset);
2131                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2132                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2133                 return;
2134         }
2135
2136         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2137                 if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2138                     ELS_LOGO ||
2139                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2140                     ELS_PRLO ||
2141                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2142                     ELS_TPRLO) {
2143                         ql_dbg(ql_dbg_disc, vha, 0xffff,
2144                             "TM response logo %phC status %#x state %#x",
2145                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2146                             mcmd->flags);
2147                         qlt_schedule_sess_for_deletion_lock(mcmd->sess);
2148                 } else {
2149                         qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
2150                                 0, 0, 0, 0, 0, 0);
2151                 }
2152         } else {
2153                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2154                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
2155                             mcmd->fc_tm_rsp, false);
2156                 else
2157                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
2158                             mcmd->fc_tm_rsp);
2159         }
2160         /*
2161          * Make the callback for ->free_mcmd() to queue_work() and invoke
2162          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2163          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2164          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2165          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2166          * qlt_xmit_tm_rsp() returns here..
2167          */
2168         ha->tgt.tgt_ops->free_mcmd(mcmd);
2169         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2170 }
2171 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2172
2173 /* No locks */
2174 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2175 {
2176         struct qla_tgt_cmd *cmd = prm->cmd;
2177
2178         BUG_ON(cmd->sg_cnt == 0);
2179
2180         prm->sg = (struct scatterlist *)cmd->sg;
2181         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
2182             cmd->sg_cnt, cmd->dma_data_direction);
2183         if (unlikely(prm->seg_cnt == 0))
2184                 goto out_err;
2185
2186         prm->cmd->sg_mapped = 1;
2187
2188         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2189                 /*
2190                  * If greater than four sg entries then we need to allocate
2191                  * the continuation entries
2192                  */
2193                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
2194                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2195                         prm->tgt->datasegs_per_cmd,
2196                         prm->tgt->datasegs_per_cont);
2197         } else {
2198                 /* DIF */
2199                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2200                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2201                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2202                         prm->tot_dsds = prm->seg_cnt;
2203                 } else
2204                         prm->tot_dsds = prm->seg_cnt;
2205
2206                 if (cmd->prot_sg_cnt) {
2207                         prm->prot_sg      = cmd->prot_sg;
2208                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
2209                                 cmd->prot_sg, cmd->prot_sg_cnt,
2210                                 cmd->dma_data_direction);
2211                         if (unlikely(prm->prot_seg_cnt == 0))
2212                                 goto out_err;
2213
2214                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2215                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2216                                 /* Dif Bundling not support here */
2217                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2218                                                                 cmd->blk_sz);
2219                                 prm->tot_dsds += prm->prot_seg_cnt;
2220                         } else
2221                                 prm->tot_dsds += prm->prot_seg_cnt;
2222                 }
2223         }
2224
2225         return 0;
2226
2227 out_err:
2228         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
2229             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2230             0, prm->cmd->sg_cnt);
2231         return -1;
2232 }
2233
2234 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2235 {
2236         struct qla_hw_data *ha = vha->hw;
2237
2238         if (!cmd->sg_mapped)
2239                 return;
2240
2241         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
2242         cmd->sg_mapped = 0;
2243
2244         if (cmd->prot_sg_cnt)
2245                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2246                         cmd->dma_data_direction);
2247
2248         if (!cmd->ctx)
2249                 return;
2250
2251         if (cmd->ctx_dsd_alloced)
2252                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2253
2254         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2255 }
2256
2257 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
2258         uint32_t req_cnt)
2259 {
2260         uint32_t cnt, cnt_in;
2261
2262         if (vha->req->cnt < (req_cnt + 2)) {
2263                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
2264                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
2265
2266                 if  (vha->req->ring_index < cnt)
2267                         vha->req->cnt = cnt - vha->req->ring_index;
2268                 else
2269                         vha->req->cnt = vha->req->length -
2270                             (vha->req->ring_index - cnt);
2271
2272                 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
2273                         ql_dbg(ql_dbg_io, vha, 0x305a,
2274                             "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",
2275                             vha->vp_idx, vha->req->ring_index,
2276                             vha->req->cnt, req_cnt, cnt, cnt_in,
2277                             vha->req->length);
2278                         return -EAGAIN;
2279                 }
2280         }
2281
2282         vha->req->cnt -= req_cnt;
2283
2284         return 0;
2285 }
2286
2287 /*
2288  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2289  */
2290 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
2291 {
2292         /* Adjust ring index. */
2293         vha->req->ring_index++;
2294         if (vha->req->ring_index == vha->req->length) {
2295                 vha->req->ring_index = 0;
2296                 vha->req->ring_ptr = vha->req->ring;
2297         } else {
2298                 vha->req->ring_ptr++;
2299         }
2300         return (cont_entry_t *)vha->req->ring_ptr;
2301 }
2302
2303 /* ha->hardware_lock supposed to be held on entry */
2304 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
2305 {
2306         struct qla_hw_data *ha = vha->hw;
2307         uint32_t h;
2308
2309         h = ha->tgt.current_handle;
2310         /* always increment cmd handle */
2311         do {
2312                 ++h;
2313                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
2314                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
2315                 if (h == ha->tgt.current_handle) {
2316                         ql_dbg(ql_dbg_io, vha, 0x305b,
2317                             "qla_target(%d): Ran out of "
2318                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
2319                         h = QLA_TGT_NULL_HANDLE;
2320                         break;
2321                 }
2322         } while ((h == QLA_TGT_NULL_HANDLE) ||
2323             (h == QLA_TGT_SKIP_HANDLE) ||
2324             (ha->tgt.cmds[h-1] != NULL));
2325
2326         if (h != QLA_TGT_NULL_HANDLE)
2327                 ha->tgt.current_handle = h;
2328
2329         return h;
2330 }
2331
2332 /* ha->hardware_lock supposed to be held on entry */
2333 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
2334         struct scsi_qla_host *vha)
2335 {
2336         uint32_t h;
2337         struct ctio7_to_24xx *pkt;
2338         struct qla_hw_data *ha = vha->hw;
2339         struct atio_from_isp *atio = &prm->cmd->atio;
2340         uint16_t temp;
2341
2342         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
2343         prm->pkt = pkt;
2344         memset(pkt, 0, sizeof(*pkt));
2345
2346         pkt->entry_type = CTIO_TYPE7;
2347         pkt->entry_count = (uint8_t)prm->req_cnt;
2348         pkt->vp_index = vha->vp_idx;
2349
2350         h = qlt_make_handle(vha);
2351         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2352                 /*
2353                  * CTIO type 7 from the firmware doesn't provide a way to
2354                  * know the initiator's LOOP ID, hence we can't find
2355                  * the session and, so, the command.
2356                  */
2357                 return -EAGAIN;
2358         } else
2359                 ha->tgt.cmds[h - 1] = prm->cmd;
2360
2361         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
2362         pkt->nport_handle = prm->cmd->loop_id;
2363         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2364         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2365         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2366         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2367         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2368         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
2369         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2370         pkt->u.status0.ox_id = cpu_to_le16(temp);
2371         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2372
2373         return 0;
2374 }
2375
2376 /*
2377  * ha->hardware_lock supposed to be held on entry. We have already made sure
2378  * that there is sufficient amount of request entries to not drop it.
2379  */
2380 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
2381         struct scsi_qla_host *vha)
2382 {
2383         int cnt;
2384         uint32_t *dword_ptr;
2385         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2386
2387         /* Build continuation packets */
2388         while (prm->seg_cnt > 0) {
2389                 cont_a64_entry_t *cont_pkt64 =
2390                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
2391
2392                 /*
2393                  * Make sure that from cont_pkt64 none of
2394                  * 64-bit specific fields used for 32-bit
2395                  * addressing. Cast to (cont_entry_t *) for
2396                  * that.
2397                  */
2398
2399                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2400
2401                 cont_pkt64->entry_count = 1;
2402                 cont_pkt64->sys_define = 0;
2403
2404                 if (enable_64bit_addressing) {
2405                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2406                         dword_ptr =
2407                             (uint32_t *)&cont_pkt64->dseg_0_address;
2408                 } else {
2409                         cont_pkt64->entry_type = CONTINUE_TYPE;
2410                         dword_ptr =
2411                             (uint32_t *)&((cont_entry_t *)
2412                                 cont_pkt64)->dseg_0_address;
2413                 }
2414
2415                 /* Load continuation entry data segments */
2416                 for (cnt = 0;
2417                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
2418                     cnt++, prm->seg_cnt--) {
2419                         *dword_ptr++ =
2420                             cpu_to_le32(pci_dma_lo32
2421                                 (sg_dma_address(prm->sg)));
2422                         if (enable_64bit_addressing) {
2423                                 *dword_ptr++ =
2424                                     cpu_to_le32(pci_dma_hi32
2425                                         (sg_dma_address
2426                                         (prm->sg)));
2427                         }
2428                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2429
2430                         prm->sg = sg_next(prm->sg);
2431                 }
2432         }
2433 }
2434
2435 /*
2436  * ha->hardware_lock supposed to be held on entry. We have already made sure
2437  * that there is sufficient amount of request entries to not drop it.
2438  */
2439 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
2440         struct scsi_qla_host *vha)
2441 {
2442         int cnt;
2443         uint32_t *dword_ptr;
2444         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2445         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2446
2447         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2448
2449         /* Setup packet address segment pointer */
2450         dword_ptr = pkt24->u.status0.dseg_0_address;
2451
2452         /* Set total data segment count */
2453         if (prm->seg_cnt)
2454                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2455
2456         if (prm->seg_cnt == 0) {
2457                 /* No data transfer */
2458                 *dword_ptr++ = 0;
2459                 *dword_ptr = 0;
2460                 return;
2461         }
2462
2463         /* If scatter gather */
2464
2465         /* Load command entry data segments */
2466         for (cnt = 0;
2467             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
2468             cnt++, prm->seg_cnt--) {
2469                 *dword_ptr++ =
2470                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2471                 if (enable_64bit_addressing) {
2472                         *dword_ptr++ =
2473                             cpu_to_le32(pci_dma_hi32(
2474                                 sg_dma_address(prm->sg)));
2475                 }
2476                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2477
2478                 prm->sg = sg_next(prm->sg);
2479         }
2480
2481         qlt_load_cont_data_segments(prm, vha);
2482 }
2483
2484 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2485 {
2486         return cmd->bufflen > 0;
2487 }
2488
2489 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2490 {
2491         struct qla_tgt_cmd *cmd;
2492         struct scsi_qla_host *vha;
2493
2494         /* asc 0x10=dif error */
2495         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2496                 cmd = prm->cmd;
2497                 vha = cmd->vha;
2498                 /* ASCQ */
2499                 switch (prm->sense_buffer[13]) {
2500                 case 1:
2501                         ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
2502                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2503                             "se_cmd=%p tag[%x]",
2504                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2505                             cmd->atio.u.isp24.exchange_addr);
2506                         break;
2507                 case 2:
2508                         ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
2509                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2510                             "se_cmd=%p tag[%x]",
2511                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2512                             cmd->atio.u.isp24.exchange_addr);
2513                         break;
2514                 case 3:
2515                         ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
2516                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2517                             "se_cmd=%p tag[%x]",
2518                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2519                             cmd->atio.u.isp24.exchange_addr);
2520                         break;
2521                 default:
2522                         ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
2523                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2524                             "se_cmd=%p tag[%x]",
2525                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2526                             cmd->atio.u.isp24.exchange_addr);
2527                         break;
2528                 }
2529                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xffff, cmd->cdb, 16);
2530         }
2531 }
2532
2533 /*
2534  * Called without ha->hardware_lock held
2535  */
2536 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2537         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2538         uint32_t *full_req_cnt)
2539 {
2540         struct qla_tgt *tgt = cmd->tgt;
2541         struct scsi_qla_host *vha = tgt->vha;
2542         struct qla_hw_data *ha = vha->hw;
2543         struct se_cmd *se_cmd = &cmd->se_cmd;
2544
2545         prm->cmd = cmd;
2546         prm->tgt = tgt;
2547         prm->rq_result = scsi_status;
2548         prm->sense_buffer = &cmd->sense_buffer[0];
2549         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2550         prm->sg = NULL;
2551         prm->seg_cnt = -1;
2552         prm->req_cnt = 1;
2553         prm->add_status_pkt = 0;
2554
2555         /* Send marker if required */
2556         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2557                 return -EFAULT;
2558
2559         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2560                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2561                         return -EAGAIN;
2562         }
2563
2564         *full_req_cnt = prm->req_cnt;
2565
2566         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2567                 prm->residual = se_cmd->residual_count;
2568                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
2569                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2570                        prm->residual, se_cmd->tag,
2571                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2572                        cmd->bufflen, prm->rq_result);
2573                 prm->rq_result |= SS_RESIDUAL_UNDER;
2574         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2575                 prm->residual = se_cmd->residual_count;
2576                 ql_dbg(ql_dbg_io, vha, 0x305d,
2577                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2578                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2579                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2580                 prm->rq_result |= SS_RESIDUAL_OVER;
2581         }
2582
2583         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2584                 /*
2585                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2586                  * ignored in *xmit_response() below
2587                  */
2588                 if (qlt_has_data(cmd)) {
2589                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2590                             (IS_FWI2_CAPABLE(ha) &&
2591                             (prm->rq_result != 0))) {
2592                                 prm->add_status_pkt = 1;
2593                                 (*full_req_cnt)++;
2594                         }
2595                 }
2596         }
2597
2598         return 0;
2599 }
2600
2601 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
2602         struct qla_tgt_cmd *cmd, int sending_sense)
2603 {
2604         if (ha->tgt.enable_class_2)
2605                 return 0;
2606
2607         if (sending_sense)
2608                 return cmd->conf_compl_supported;
2609         else
2610                 return ha->tgt.enable_explicit_conf &&
2611                     cmd->conf_compl_supported;
2612 }
2613
2614 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2615         struct qla_tgt_prm *prm)
2616 {
2617         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2618             (uint32_t)sizeof(ctio->u.status1.sense_data));
2619         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2620         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2621                 ctio->u.status0.flags |= cpu_to_le16(
2622                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2623                     CTIO7_FLAGS_CONFORM_REQ);
2624         }
2625         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2626         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2627         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2628                 int i;
2629
2630                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2631                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2632                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2633                                     "Skipping EXPLICIT_CONFORM and "
2634                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2635                                     "non GOOD status\n");
2636                                 goto skip_explict_conf;
2637                         }
2638                         ctio->u.status1.flags |= cpu_to_le16(
2639                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2640                             CTIO7_FLAGS_CONFORM_REQ);
2641                 }
2642 skip_explict_conf:
2643                 ctio->u.status1.flags &=
2644                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2645                 ctio->u.status1.flags |=
2646                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2647                 ctio->u.status1.scsi_status |=
2648                     cpu_to_le16(SS_SENSE_LEN_VALID);
2649                 ctio->u.status1.sense_length =
2650                     cpu_to_le16(prm->sense_buffer_len);
2651                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2652                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2653                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2654
2655                 qlt_print_dif_err(prm);
2656
2657         } else {
2658                 ctio->u.status1.flags &=
2659                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2660                 ctio->u.status1.flags |=
2661                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2662                 ctio->u.status1.sense_length = 0;
2663                 memset(ctio->u.status1.sense_data, 0,
2664                     sizeof(ctio->u.status1.sense_data));
2665         }
2666
2667         /* Sense with len > 24, is it possible ??? */
2668 }
2669
2670 static inline int
2671 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2672 {
2673         switch (se_cmd->prot_op) {
2674         case TARGET_PROT_DOUT_INSERT:
2675         case TARGET_PROT_DIN_STRIP:
2676                 if (ql2xenablehba_err_chk >= 1)
2677                         return 1;
2678                 break;
2679         case TARGET_PROT_DOUT_PASS:
2680         case TARGET_PROT_DIN_PASS:
2681                 if (ql2xenablehba_err_chk >= 2)
2682                         return 1;
2683                 break;
2684         case TARGET_PROT_DIN_INSERT:
2685         case TARGET_PROT_DOUT_STRIP:
2686                 return 1;
2687         default:
2688                 break;
2689         }
2690         return 0;
2691 }
2692
2693 static inline int
2694 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2695 {
2696         switch (se_cmd->prot_op) {
2697         case TARGET_PROT_DIN_INSERT:
2698         case TARGET_PROT_DOUT_INSERT:
2699         case TARGET_PROT_DIN_STRIP:
2700         case TARGET_PROT_DOUT_STRIP:
2701         case TARGET_PROT_DIN_PASS:
2702         case TARGET_PROT_DOUT_PASS:
2703             return 1;
2704         default:
2705             return 0;
2706         }
2707         return 0;
2708 }
2709
2710 /*
2711  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2712  */
2713 static void
2714 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2715     uint16_t *pfw_prot_opts)
2716 {
2717         struct se_cmd *se_cmd = &cmd->se_cmd;
2718         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2719         scsi_qla_host_t *vha = cmd->tgt->vha;
2720         struct qla_hw_data *ha = vha->hw;
2721         uint32_t t32 = 0;
2722
2723         /*
2724          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2725          * have been immplemented by TCM, before AppTag is avail.
2726          * Look for modesense_handlers[]
2727          */
2728         ctx->app_tag = 0;
2729         ctx->app_tag_mask[0] = 0x0;
2730         ctx->app_tag_mask[1] = 0x0;
2731
2732         if (IS_PI_UNINIT_CAPABLE(ha)) {
2733                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2734                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2735                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2736                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2737                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2738         }
2739
2740         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2741
2742         switch (se_cmd->prot_type) {
2743         case TARGET_DIF_TYPE0_PROT:
2744                 /*
2745                  * No check for ql2xenablehba_err_chk, as it
2746                  * would be an I/O error if hba tag generation
2747                  * is not done.
2748                  */
2749                 ctx->ref_tag = cpu_to_le32(lba);
2750                 /* enable ALL bytes of the ref tag */
2751                 ctx->ref_tag_mask[0] = 0xff;
2752                 ctx->ref_tag_mask[1] = 0xff;
2753                 ctx->ref_tag_mask[2] = 0xff;
2754                 ctx->ref_tag_mask[3] = 0xff;
2755                 break;
2756         case TARGET_DIF_TYPE1_PROT:
2757             /*
2758              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2759              * REF tag, and 16 bit app tag.
2760              */
2761             ctx->ref_tag = cpu_to_le32(lba);
2762             if (!qla_tgt_ref_mask_check(se_cmd) ||
2763                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2764                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2765                     break;
2766             }
2767             /* enable ALL bytes of the ref tag */
2768             ctx->ref_tag_mask[0] = 0xff;
2769             ctx->ref_tag_mask[1] = 0xff;
2770             ctx->ref_tag_mask[2] = 0xff;
2771             ctx->ref_tag_mask[3] = 0xff;
2772             break;
2773         case TARGET_DIF_TYPE2_PROT:
2774             /*
2775              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2776              * tag has to match LBA in CDB + N
2777              */
2778             ctx->ref_tag = cpu_to_le32(lba);
2779             if (!qla_tgt_ref_mask_check(se_cmd) ||
2780                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2781                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2782                     break;
2783             }
2784             /* enable ALL bytes of the ref tag */
2785             ctx->ref_tag_mask[0] = 0xff;
2786             ctx->ref_tag_mask[1] = 0xff;
2787             ctx->ref_tag_mask[2] = 0xff;
2788             ctx->ref_tag_mask[3] = 0xff;
2789             break;
2790         case TARGET_DIF_TYPE3_PROT:
2791             /* For TYPE 3 protection: 16 bit GUARD only */
2792             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2793             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2794                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2795             break;
2796         }
2797 }
2798
2799 static inline int
2800 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2801 {
2802         uint32_t                *cur_dsd;
2803         uint32_t                transfer_length = 0;
2804         uint32_t                data_bytes;
2805         uint32_t                dif_bytes;
2806         uint8_t                 bundling = 1;
2807         uint8_t                 *clr_ptr;
2808         struct crc_context      *crc_ctx_pkt = NULL;
2809         struct qla_hw_data      *ha;
2810         struct ctio_crc2_to_fw  *pkt;
2811         dma_addr_t              crc_ctx_dma;
2812         uint16_t                fw_prot_opts = 0;
2813         struct qla_tgt_cmd      *cmd = prm->cmd;
2814         struct se_cmd           *se_cmd = &cmd->se_cmd;
2815         uint32_t h;
2816         struct atio_from_isp *atio = &prm->cmd->atio;
2817         struct qla_tc_param     tc;
2818         uint16_t t16;
2819
2820         ha = vha->hw;
2821
2822         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2823         prm->pkt = pkt;
2824         memset(pkt, 0, sizeof(*pkt));
2825
2826         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2827                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2828                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2829                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2830
2831         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2832             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2833                 bundling = 0;
2834
2835         /* Compute dif len and adjust data len to incude protection */
2836         data_bytes = cmd->bufflen;
2837         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2838
2839         switch (se_cmd->prot_op) {
2840         case TARGET_PROT_DIN_INSERT:
2841         case TARGET_PROT_DOUT_STRIP:
2842                 transfer_length = data_bytes;
2843                 if (cmd->prot_sg_cnt)
2844                         data_bytes += dif_bytes;
2845                 break;
2846         case TARGET_PROT_DIN_STRIP:
2847         case TARGET_PROT_DOUT_INSERT:
2848         case TARGET_PROT_DIN_PASS:
2849         case TARGET_PROT_DOUT_PASS:
2850                 transfer_length = data_bytes + dif_bytes;
2851                 break;
2852         default:
2853                 BUG();
2854                 break;
2855         }
2856
2857         if (!qlt_hba_err_chk_enabled(se_cmd))
2858                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2859         /* HBA error checking enabled */
2860         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2861                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2862                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2863                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2864                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2865                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2866         }
2867
2868         switch (se_cmd->prot_op) {
2869         case TARGET_PROT_DIN_INSERT:
2870         case TARGET_PROT_DOUT_INSERT:
2871                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2872                 break;
2873         case TARGET_PROT_DIN_STRIP:
2874         case TARGET_PROT_DOUT_STRIP:
2875                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2876                 break;
2877         case TARGET_PROT_DIN_PASS:
2878         case TARGET_PROT_DOUT_PASS:
2879                 fw_prot_opts |= PO_MODE_DIF_PASS;
2880                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2881                 break;
2882         default:/* Normal Request */
2883                 fw_prot_opts |= PO_MODE_DIF_PASS;
2884                 break;
2885         }
2886
2887         /* ---- PKT ---- */
2888         /* Update entry type to indicate Command Type CRC_2 IOCB */
2889         pkt->entry_type  = CTIO_CRC2;
2890         pkt->entry_count = 1;
2891         pkt->vp_index = vha->vp_idx;
2892
2893         h = qlt_make_handle(vha);
2894         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2895                 /*
2896                  * CTIO type 7 from the firmware doesn't provide a way to
2897                  * know the initiator's LOOP ID, hence we can't find
2898                  * the session and, so, the command.
2899                  */
2900                 return -EAGAIN;
2901         } else
2902                 ha->tgt.cmds[h-1] = prm->cmd;
2903
2904         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2905         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2906         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2907         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2908         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2909         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2910         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2911
2912         /* silence compile warning */
2913         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2914         pkt->ox_id  = cpu_to_le16(t16);
2915
2916         t16 = (atio->u.isp24.attr << 9);
2917         pkt->flags |= cpu_to_le16(t16);
2918         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2919
2920         /* Set transfer direction */
2921         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2922                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2923         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2924                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2925
2926         pkt->dseg_count = prm->tot_dsds;
2927         /* Fibre channel byte count */
2928         pkt->transfer_length = cpu_to_le32(transfer_length);
2929
2930         /* ----- CRC context -------- */
2931
2932         /* Allocate CRC context from global pool */
2933         crc_ctx_pkt = cmd->ctx =
2934             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2935
2936         if (!crc_ctx_pkt)
2937                 goto crc_queuing_error;
2938
2939         /* Zero out CTX area. */
2940         clr_ptr = (uint8_t *)crc_ctx_pkt;
2941         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2942
2943         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2944         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2945
2946         /* Set handle */
2947         crc_ctx_pkt->handle = pkt->handle;
2948
2949         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
2950
2951         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2952         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2953         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2954
2955         if (!bundling) {
2956                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2957         } else {
2958                 /*
2959                  * Configure Bundling if we need to fetch interlaving
2960                  * protection PCI accesses
2961                  */
2962                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2963                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2964                 crc_ctx_pkt->u.bundling.dseg_count =
2965                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2966                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2967         }
2968
2969         /* Finish the common fields of CRC pkt */
2970         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2971         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2972         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2973         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2974
2975         memset((uint8_t *)&tc, 0 , sizeof(tc));
2976         tc.vha = vha;
2977         tc.blk_sz = cmd->blk_sz;
2978         tc.bufflen = cmd->bufflen;
2979         tc.sg = cmd->sg;
2980         tc.prot_sg = cmd->prot_sg;
2981         tc.ctx = crc_ctx_pkt;
2982         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
2983
2984         /* Walks data segments */
2985         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2986
2987         if (!bundling && prm->prot_seg_cnt) {
2988                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2989                         prm->tot_dsds, &tc))
2990                         goto crc_queuing_error;
2991         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2992                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
2993                 goto crc_queuing_error;
2994
2995         if (bundling && prm->prot_seg_cnt) {
2996                 /* Walks dif segments */
2997                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2998
2999                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
3000                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3001                         prm->prot_seg_cnt, &tc))
3002                         goto crc_queuing_error;
3003         }
3004         return QLA_SUCCESS;
3005
3006 crc_queuing_error:
3007         /* Cleanup will be performed by the caller */
3008         vha->hw->tgt.cmds[h - 1] = NULL;
3009
3010         return QLA_FUNCTION_FAILED;
3011 }
3012
3013 /*
3014  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3015  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3016  */
3017 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3018         uint8_t scsi_status)
3019 {
3020         struct scsi_qla_host *vha = cmd->vha;
3021         struct qla_hw_data *ha = vha->hw;
3022         struct ctio7_to_24xx *pkt;
3023         struct qla_tgt_prm prm;
3024         uint32_t full_req_cnt = 0;
3025         unsigned long flags = 0;
3026         int res;
3027
3028         spin_lock_irqsave(&ha->hardware_lock, flags);
3029         if (cmd->sess && cmd->sess->deleted) {
3030                 cmd->state = QLA_TGT_STATE_PROCESSED;
3031                 if (cmd->sess->logout_completed)
3032                         /* no need to terminate. FW already freed exchange. */
3033                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3034                 else
3035                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3036                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3037                 return 0;
3038         }
3039         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3040
3041         memset(&prm, 0, sizeof(prm));
3042
3043         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
3044             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
3045             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3046             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3047             &cmd->se_cmd);
3048
3049         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3050             &full_req_cnt);
3051         if (unlikely(res != 0)) {
3052                 return res;
3053         }
3054
3055         spin_lock_irqsave(&ha->hardware_lock, flags);
3056
3057         if (xmit_type == QLA_TGT_XMIT_STATUS)
3058                 vha->tgt_counters.core_qla_snd_status++;
3059         else
3060                 vha->tgt_counters.core_qla_que_buf++;
3061
3062         if (!ha->flags.fw_started || cmd->reset_count != ha->chip_reset) {
3063                 /*
3064                  * Either the port is not online or this request was from
3065                  * previous life, just abort the processing.
3066                  */
3067                 cmd->state = QLA_TGT_STATE_PROCESSED;
3068                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3069                 ql_dbg(ql_dbg_async, vha, 0xe101,
3070                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3071                         vha->flags.online, qla2x00_reset_active(vha),
3072                         cmd->reset_count, ha->chip_reset);
3073                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3074                 return 0;
3075         }
3076
3077         /* Does F/W have an IOCBs for this request */
3078         res = qlt_check_reserve_free_req(vha, full_req_cnt);
3079         if (unlikely(res))
3080                 goto out_unmap_unlock;
3081
3082         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3083                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
3084         else
3085                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
3086         if (unlikely(res != 0)) {
3087                 vha->req->cnt += full_req_cnt;
3088                 goto out_unmap_unlock;
3089         }
3090
3091         pkt = (struct ctio7_to_24xx *)prm.pkt;
3092
3093         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3094                 pkt->u.status0.flags |=
3095                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3096                         CTIO7_FLAGS_STATUS_MODE_0);
3097
3098                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3099                         qlt_load_data_segments(&prm, vha);
3100
3101                 if (prm.add_status_pkt == 0) {
3102                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3103                                 pkt->u.status0.scsi_status =
3104                                     cpu_to_le16(prm.rq_result);
3105                                 pkt->u.status0.residual =
3106                                     cpu_to_le32(prm.residual);
3107                                 pkt->u.status0.flags |= cpu_to_le16(
3108                                     CTIO7_FLAGS_SEND_STATUS);
3109                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
3110                                         pkt->u.status0.flags |=
3111                                             cpu_to_le16(
3112                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3113                                                 CTIO7_FLAGS_CONFORM_REQ);
3114                                 }
3115                         }
3116
3117                 } else {
3118                         /*
3119                          * We have already made sure that there is sufficient
3120                          * amount of request entries to not drop HW lock in
3121                          * req_pkt().
3122                          */
3123                         struct ctio7_to_24xx *ctio =
3124                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
3125
3126                         ql_dbg(ql_dbg_io, vha, 0x305e,
3127                             "Building additional status packet 0x%p.\n",
3128                             ctio);
3129
3130                         /*
3131                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3132                          * ctio7_to_24xx
3133                          */
3134                         memcpy(ctio, pkt, sizeof(*ctio));
3135                         /* reset back to CTIO7 */
3136                         ctio->entry_count = 1;
3137                         ctio->entry_type = CTIO_TYPE7;
3138                         ctio->dseg_count = 0;
3139                         ctio->u.status1.flags &= ~cpu_to_le16(
3140                             CTIO7_FLAGS_DATA_IN);
3141
3142                         /* Real finish is ctio_m1's finish */
3143                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3144                         pkt->u.status0.flags |= cpu_to_le16(
3145                             CTIO7_FLAGS_DONT_RET_CTIO);
3146
3147                         /* qlt_24xx_init_ctio_to_isp will correct
3148                          * all neccessary fields that's part of CTIO7.
3149                          * There should be no residual of CTIO-CRC2 data.
3150                          */
3151                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3152                             &prm);
3153                         pr_debug("Status CTIO7: %p\n", ctio);
3154                 }
3155         } else
3156                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3157
3158
3159         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3160         cmd->cmd_sent_to_fw = 1;
3161
3162         /* Memory Barrier */
3163         wmb();
3164         qla2x00_start_iocbs(vha, vha->req);
3165         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3166
3167         return 0;
3168
3169 out_unmap_unlock:
3170         qlt_unmap_sg(vha, cmd);
3171         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3172
3173         return res;
3174 }
3175 EXPORT_SYMBOL(qlt_xmit_response);
3176
3177 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3178 {
3179         struct ctio7_to_24xx *pkt;
3180         struct scsi_qla_host *vha = cmd->vha;
3181         struct qla_hw_data *ha = vha->hw;
3182         struct qla_tgt *tgt = cmd->tgt;
3183         struct qla_tgt_prm prm;
3184         unsigned long flags;
3185         int res = 0;
3186
3187         memset(&prm, 0, sizeof(prm));
3188         prm.cmd = cmd;
3189         prm.tgt = tgt;
3190         prm.sg = NULL;
3191         prm.req_cnt = 1;
3192
3193         /* Send marker if required */
3194         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
3195                 return -EIO;
3196
3197         /* Calculate number of entries and segments required */
3198         if (qlt_pci_map_calc_cnt(&prm) != 0)
3199                 return -EAGAIN;
3200
3201         spin_lock_irqsave(&ha->hardware_lock, flags);
3202
3203         if (!ha->flags.fw_started || (cmd->reset_count != ha->chip_reset) ||
3204             (cmd->sess && cmd->sess->deleted)) {
3205                 /*
3206                  * Either the port is not online or this request was from
3207                  * previous life, just abort the processing.
3208                  */
3209                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3210                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3211                 ql_dbg(ql_dbg_async, vha, 0xe102,
3212                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3213                         vha->flags.online, qla2x00_reset_active(vha),
3214                         cmd->reset_count, ha->chip_reset);
3215                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3216                 return 0;
3217         }
3218
3219         /* Does F/W have an IOCBs for this request */
3220         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
3221         if (res != 0)
3222                 goto out_unlock_free_unmap;
3223         if (cmd->se_cmd.prot_op)
3224                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
3225         else
3226                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
3227
3228         if (unlikely(res != 0)) {
3229                 vha->req->cnt += prm.req_cnt;
3230                 goto out_unlock_free_unmap;
3231         }
3232
3233         pkt = (struct ctio7_to_24xx *)prm.pkt;
3234         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3235             CTIO7_FLAGS_STATUS_MODE_0);
3236
3237         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3238                 qlt_load_data_segments(&prm, vha);
3239
3240         cmd->state = QLA_TGT_STATE_NEED_DATA;
3241         cmd->cmd_sent_to_fw = 1;
3242
3243         /* Memory Barrier */
3244         wmb();
3245         qla2x00_start_iocbs(vha, vha->req);
3246         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3247
3248         return res;
3249
3250 out_unlock_free_unmap:
3251         qlt_unmap_sg(vha, cmd);
3252         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3253
3254         return res;
3255 }
3256 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3257
3258
3259 /*
3260  * it is assumed either hardware_lock or qpair lock is held.
3261  */
3262 static void
3263 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
3264         struct ctio_crc_from_fw *sts)
3265 {
3266         uint8_t         *ap = &sts->actual_dif[0];
3267         uint8_t         *ep = &sts->expected_dif[0];
3268         uint64_t        lba = cmd->se_cmd.t_task_lba;
3269         uint8_t scsi_status, sense_key, asc, ascq;
3270         unsigned long flags;
3271
3272         cmd->trc_flags |= TRC_DIF_ERR;
3273
3274         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3275         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3276         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3277
3278         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3279         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3280         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3281
3282         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3283             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3284
3285         scsi_status = sense_key = asc = ascq = 0;
3286
3287         /* check appl tag */
3288         if (cmd->e_app_tag != cmd->a_app_tag) {
3289                 ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
3290                         "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] "
3291                         "Ref[%x|%x], App[%x|%x], "
3292                         "Guard [%x|%x] cmd=%p ox_id[%04x]",
3293                         cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3294                         cmd->a_ref_tag, cmd->e_ref_tag,
3295                         cmd->a_app_tag, cmd->e_app_tag,
3296                         cmd->a_guard, cmd->e_guard,
3297                         cmd, cmd->atio.u.isp24.fcp_hdr.ox_id);
3298
3299                 cmd->dif_err_code = DIF_ERR_APP;
3300                 scsi_status = SAM_STAT_CHECK_CONDITION;
3301                 sense_key = ABORTED_COMMAND;
3302                 asc = 0x10;
3303                 ascq = 0x2;
3304         }
3305
3306         /* check ref tag */
3307         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3308                 ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
3309                         "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] "
3310                         "Ref[%x|%x], App[%x|%x], "
3311                         "Guard[%x|%x] cmd=%p ox_id[%04x] ",
3312                         cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3313                         cmd->a_ref_tag, cmd->e_ref_tag,
3314                         cmd->a_app_tag, cmd->e_app_tag,
3315                         cmd->a_guard, cmd->e_guard,
3316                         cmd, cmd->atio.u.isp24.fcp_hdr.ox_id);
3317
3318                 cmd->dif_err_code = DIF_ERR_REF;
3319                 scsi_status = SAM_STAT_CHECK_CONDITION;
3320                 sense_key = ABORTED_COMMAND;
3321                 asc = 0x10;
3322                 ascq = 0x3;
3323                 goto out;
3324         }
3325
3326         /* check guard */
3327         if (cmd->e_guard != cmd->a_guard) {
3328                 ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
3329                         "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] "
3330                         "Ref[%x|%x], App[%x|%x], "
3331                         "Guard [%x|%x] cmd=%p ox_id[%04x]",
3332                         cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3333                         cmd->a_ref_tag, cmd->e_ref_tag,
3334                         cmd->a_app_tag, cmd->e_app_tag,
3335                         cmd->a_guard, cmd->e_guard,
3336                         cmd, cmd->atio.u.isp24.fcp_hdr.ox_id);
3337                 cmd->dif_err_code = DIF_ERR_GRD;
3338                 scsi_status = SAM_STAT_CHECK_CONDITION;
3339                 sense_key = ABORTED_COMMAND;
3340                 asc = 0x10;
3341                 ascq = 0x1;
3342         }
3343 out:
3344         switch (cmd->state) {
3345         case QLA_TGT_STATE_NEED_DATA:
3346                 /* handle_data will load DIF error code  */
3347                 cmd->state = QLA_TGT_STATE_DATA_IN;
3348                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3349                 break;
3350         default:
3351                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3352                 if (cmd->aborted) {
3353                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3354                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3355                         break;
3356                 }
3357                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3358
3359                 qlt_send_resp_ctio(vha, cmd, scsi_status, sense_key, asc, ascq);
3360                 /* assume scsi status gets out on the wire.
3361                  * Will not wait for completion.
3362                  */
3363                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3364                 break;
3365         }
3366 }
3367
3368 /* If hardware_lock held on entry, might drop it, then reaquire */
3369 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3370 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3371         struct imm_ntfy_from_isp *ntfy)
3372 {
3373         struct nack_to_isp *nack;
3374         struct qla_hw_data *ha = vha->hw;
3375         request_t *pkt;
3376         int ret = 0;
3377
3378         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3379             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3380
3381         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3382         if (pkt == NULL) {
3383                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3384                     "qla_target(%d): %s failed: unable to allocate "
3385                     "request packet\n", vha->vp_idx, __func__);
3386                 return -ENOMEM;
3387         }
3388
3389         pkt->entry_type = NOTIFY_ACK_TYPE;
3390         pkt->entry_count = 1;
3391         pkt->handle = QLA_TGT_SKIP_HANDLE;
3392
3393         nack = (struct nack_to_isp *)pkt;
3394         nack->ox_id = ntfy->ox_id;
3395
3396         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3397         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3398                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3399                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3400         }
3401
3402         /* terminate */
3403         nack->u.isp24.flags |=
3404                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3405
3406         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3407         nack->u.isp24.status = ntfy->u.isp24.status;
3408         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3409         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3410         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3411         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3412         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3413         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3414
3415         qla2x00_start_iocbs(vha, vha->req);
3416         return ret;
3417 }
3418
3419 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3420         struct imm_ntfy_from_isp *imm, int ha_locked)
3421 {
3422         unsigned long flags = 0;
3423         int rc;
3424
3425         if (qlt_issue_marker(vha, ha_locked) < 0)
3426                 return;
3427
3428         if (ha_locked) {
3429                 rc = __qlt_send_term_imm_notif(vha, imm);
3430
3431 #if 0   /* Todo  */
3432                 if (rc == -ENOMEM)
3433                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3434 #else
3435                 if (rc) {
3436                 }
3437 #endif
3438                 goto done;
3439         }
3440
3441         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3442         rc = __qlt_send_term_imm_notif(vha, imm);
3443
3444 #if 0   /* Todo */
3445         if (rc == -ENOMEM)
3446                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3447 #endif
3448
3449 done:
3450         if (!ha_locked)
3451                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3452 }
3453
3454 /* If hardware_lock held on entry, might drop it, then reaquire */
3455 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3456 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
3457         struct qla_tgt_cmd *cmd,
3458         struct atio_from_isp *atio)
3459 {
3460         struct ctio7_to_24xx *ctio24;
3461         struct qla_hw_data *ha = vha->hw;
3462         request_t *pkt;
3463         int ret = 0;
3464         uint16_t temp;
3465
3466         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3467
3468         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3469         if (pkt == NULL) {
3470                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3471                     "qla_target(%d): %s failed: unable to allocate "
3472                     "request packet\n", vha->vp_idx, __func__);
3473                 return -ENOMEM;
3474         }
3475
3476         if (cmd != NULL) {
3477                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3478                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3479                             "qla_target(%d): Terminating cmd %p with "
3480                             "incorrect state %d\n", vha->vp_idx, cmd,
3481                             cmd->state);
3482                 } else
3483                         ret = 1;
3484         }
3485
3486         vha->tgt_counters.num_term_xchg_sent++;
3487         pkt->entry_count = 1;
3488         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3489
3490         ctio24 = (struct ctio7_to_24xx *)pkt;
3491         ctio24->entry_type = CTIO_TYPE7;
3492         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3493         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3494         ctio24->vp_index = vha->vp_idx;
3495         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3496         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3497         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3498         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3499         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3500             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
3501                 CTIO7_FLAGS_TERMINATE);
3502         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3503         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3504
3505         /* Most likely, it isn't needed */
3506         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3507             &atio->u.isp24.fcp_cmnd.add_cdb[
3508             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3509         if (ctio24->u.status1.residual != 0)
3510                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3511
3512         /* Memory Barrier */
3513         wmb();
3514         qla2x00_start_iocbs(vha, vha->req);
3515         return ret;
3516 }
3517
3518 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3519         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3520         int ul_abort)
3521 {
3522         unsigned long flags = 0;
3523         int rc;
3524
3525         if (qlt_issue_marker(vha, ha_locked) < 0)
3526                 return;
3527
3528         if (ha_locked) {
3529                 rc = __qlt_send_term_exchange(vha, cmd, atio);
3530                 if (rc == -ENOMEM)
3531                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3532                 goto done;
3533         }
3534         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3535         rc = __qlt_send_term_exchange(vha, cmd, atio);
3536         if (rc == -ENOMEM)
3537                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3538
3539 done:
3540         if (cmd && !ul_abort && !cmd->aborted) {
3541                 if (cmd->sg_mapped)
3542                         qlt_unmap_sg(vha, cmd);
3543                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3544         }
3545
3546         if (!ha_locked)
3547                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3548
3549         return;
3550 }
3551
3552 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3553 {
3554         struct list_head free_list;
3555         struct qla_tgt_cmd *cmd, *tcmd;
3556
3557         vha->hw->tgt.leak_exchg_thresh_hold =
3558             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3559
3560         cmd = tcmd = NULL;
3561         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3562                 INIT_LIST_HEAD(&free_list);
3563                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3564
3565                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3566                         list_del(&cmd->cmd_list);
3567                         /* This cmd was never sent to TCM.  There is no need
3568                          * to schedule free or call free_cmd
3569                          */
3570                         qlt_free_cmd(cmd);
3571                         vha->hw->tgt.num_qfull_cmds_alloc--;
3572                 }
3573         }
3574         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3575 }
3576
3577 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3578 {
3579         uint32_t total_leaked;
3580
3581         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3582
3583         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3584             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3585
3586                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3587                     "Chip reset due to exchange starvation: %d/%d.\n",
3588                     total_leaked, vha->hw->cur_fw_xcb_count);
3589
3590                 if (IS_P3P_TYPE(vha->hw))
3591                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3592                 else
3593                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3594                 qla2xxx_wake_dpc(vha);
3595         }
3596
3597 }
3598
3599 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3600 {
3601         struct qla_tgt *tgt = cmd->tgt;
3602         struct scsi_qla_host *vha = tgt->vha;
3603         struct se_cmd *se_cmd = &cmd->se_cmd;
3604         unsigned long flags;
3605
3606         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3607             "qla_target(%d): terminating exchange for aborted cmd=%p "
3608             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3609             se_cmd->tag);
3610
3611         spin_lock_irqsave(&cmd->cmd_lock, flags);
3612         if (cmd->aborted) {
3613                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3614                 /*
3615                  * It's normal to see 2 calls in this path:
3616                  *  1) XFER Rdy completion + CMD_T_ABORT
3617                  *  2) TCM TMR - drain_state_list
3618                  */
3619                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
3620                         "multiple abort. %p transport_state %x, t_state %x,"
3621                         " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state,
3622                         cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags);
3623                 return EIO;
3624         }
3625         cmd->aborted = 1;
3626         cmd->trc_flags |= TRC_ABORT;
3627         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3628
3629         qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1);
3630         return 0;
3631 }
3632 EXPORT_SYMBOL(qlt_abort_cmd);
3633
3634 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3635 {
3636         struct fc_port *sess = cmd->sess;
3637
3638         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3639             "%s: se_cmd[%p] ox_id %04x\n",
3640             __func__, &cmd->se_cmd,
3641             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3642
3643         BUG_ON(cmd->cmd_in_wq);
3644
3645         if (cmd->sg_mapped)
3646                 qlt_unmap_sg(cmd->vha, cmd);
3647
3648         if (!cmd->q_full)
3649                 qlt_decr_num_pend_cmds(cmd->vha);
3650
3651         BUG_ON(cmd->sg_mapped);
3652         cmd->jiffies_at_free = get_jiffies_64();
3653         if (unlikely(cmd->free_sg))
3654                 kfree(cmd->sg);
3655
3656         if (!sess || !sess->se_sess) {
3657                 WARN_ON(1);
3658                 return;
3659         }
3660         cmd->jiffies_at_free = get_jiffies_64();
3661         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3662 }
3663 EXPORT_SYMBOL(qlt_free_cmd);
3664
3665 /*
3666  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3667  */
3668 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3669         struct qla_tgt_cmd *cmd, uint32_t status)
3670 {
3671         int term = 0;
3672
3673         if (cmd->se_cmd.prot_op)
3674                 ql_dbg(ql_dbg_tgt_dif, vha, 0xffff,
3675                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3676                     "se_cmd=%p tag[%x] op %#x/%s",
3677                      cmd->lba, cmd->lba,
3678                      cmd->num_blks, &cmd->se_cmd,
3679                      cmd->atio.u.isp24.exchange_addr,
3680                      cmd->se_cmd.prot_op,
3681                      prot_op_str(cmd->se_cmd.prot_op));
3682
3683         if (ctio != NULL) {
3684                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3685                 term = !(c->flags &
3686                     cpu_to_le16(OF_TERM_EXCH));
3687         } else
3688                 term = 1;
3689
3690         if (term)
3691                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3692
3693         return term;
3694 }
3695
3696 /* ha->hardware_lock supposed to be held on entry */
3697 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3698         uint32_t handle)
3699 {
3700         struct qla_hw_data *ha = vha->hw;
3701
3702         handle--;
3703         if (ha->tgt.cmds[handle] != NULL) {
3704                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3705                 ha->tgt.cmds[handle] = NULL;
3706                 return cmd;
3707         } else
3708                 return NULL;
3709 }
3710
3711 /* ha->hardware_lock supposed to be held on entry */
3712 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3713         uint32_t handle, void *ctio)
3714 {
3715         struct qla_tgt_cmd *cmd = NULL;
3716
3717         /* Clear out internal marks */
3718         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3719             CTIO_INTERMEDIATE_HANDLE_MARK);
3720
3721         if (handle != QLA_TGT_NULL_HANDLE) {
3722                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3723                         return NULL;
3724
3725                 /* handle-1 is actually used */
3726                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3727                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3728                             "qla_target(%d): Wrong handle %x received\n",
3729                             vha->vp_idx, handle);
3730                         return NULL;
3731                 }
3732                 cmd = qlt_get_cmd(vha, handle);
3733                 if (unlikely(cmd == NULL)) {
3734                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
3735                             "qla_target(%d): Suspicious: unable to "
3736                             "find the command with handle %x\n", vha->vp_idx,
3737                             handle);
3738                         return NULL;
3739                 }
3740         } else if (ctio != NULL) {
3741                 /* We can't get loop ID from CTIO7 */
3742                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3743                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3744                     "support NULL handles\n", vha->vp_idx);
3745                 return NULL;
3746         }
3747
3748         return cmd;
3749 }
3750
3751 /* hardware_lock should be held by caller. */
3752 static void
3753 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3754 {
3755         struct qla_hw_data *ha = vha->hw;
3756         uint32_t handle;
3757
3758         if (cmd->sg_mapped)
3759                 qlt_unmap_sg(vha, cmd);
3760
3761         handle = qlt_make_handle(vha);
3762
3763         /* TODO: fix debug message type and ids. */
3764         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3765                 ql_dbg(ql_dbg_io, vha, 0xff00,
3766                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3767         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3768                 cmd->write_data_transferred = 0;
3769                 cmd->state = QLA_TGT_STATE_DATA_IN;
3770
3771                 ql_dbg(ql_dbg_io, vha, 0xff01,
3772                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3773
3774                 ha->tgt.tgt_ops->handle_data(cmd);
3775                 return;
3776         } else {
3777                 ql_dbg(ql_dbg_io, vha, 0xff03,
3778                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3779                     cmd->state);
3780                 dump_stack();
3781         }
3782
3783         cmd->trc_flags |= TRC_FLUSH;
3784         ha->tgt.tgt_ops->free_cmd(cmd);
3785 }
3786
3787 void
3788 qlt_host_reset_handler(struct qla_hw_data *ha)
3789 {
3790         struct qla_tgt_cmd *cmd;
3791         unsigned long flags;
3792         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3793         scsi_qla_host_t *vha = NULL;
3794         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3795         uint32_t i;
3796
3797         if (!base_vha->hw->tgt.tgt_ops)
3798                 return;
3799
3800         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3801                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3802                         "Target mode disabled\n");
3803                 return;
3804         }
3805
3806         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3807             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3808             base_vha->dpc_flags);
3809
3810         spin_lock_irqsave(&ha->hardware_lock, flags);
3811         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3812                 cmd = qlt_get_cmd(base_vha, i);
3813                 if (!cmd)
3814                         continue;
3815                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3816                 vha = cmd->vha;
3817                 qlt_abort_cmd_on_host_reset(vha, cmd);
3818         }
3819         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3820 }
3821
3822
3823 /*
3824  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3825  */
3826 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3827         uint32_t status, void *ctio)
3828 {
3829         struct qla_hw_data *ha = vha->hw;
3830         struct se_cmd *se_cmd;
3831         struct qla_tgt_cmd *cmd;
3832
3833         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3834                 /* That could happen only in case of an error/reset/abort */
3835                 if (status != CTIO_SUCCESS) {
3836                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3837                             "Intermediate CTIO received"
3838                             " (status %x)\n", status);
3839                 }
3840                 return;
3841         }
3842
3843         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3844         if (cmd == NULL)
3845                 return;
3846
3847         se_cmd = &cmd->se_cmd;
3848         cmd->cmd_sent_to_fw = 0;
3849
3850         qlt_unmap_sg(vha, cmd);
3851
3852         if (unlikely(status != CTIO_SUCCESS)) {
3853                 switch (status & 0xFFFF) {
3854                 case CTIO_LIP_RESET:
3855                 case CTIO_TARGET_RESET:
3856                 case CTIO_ABORTED:
3857                         /* driver request abort via Terminate exchange */
3858                 case CTIO_TIMEOUT:
3859                 case CTIO_INVALID_RX_ID:
3860                         /* They are OK */
3861                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3862                             "qla_target(%d): CTIO with "
3863                             "status %#x received, state %x, se_cmd %p, "
3864                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3865                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3866                             status, cmd->state, se_cmd);
3867                         break;
3868
3869                 case CTIO_PORT_LOGGED_OUT:
3870                 case CTIO_PORT_UNAVAILABLE:
3871                 {
3872                         int logged_out =
3873                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3874
3875                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3876                             "qla_target(%d): CTIO with %s status %x "
3877                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3878                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3879                             status, cmd->state, se_cmd);
3880
3881                         if (logged_out && cmd->sess) {
3882                                 /*
3883                                  * Session is already logged out, but we need
3884                                  * to notify initiator, who's not aware of this
3885                                  */
3886                                 cmd->sess->logout_on_delete = 0;
3887                                 cmd->sess->send_els_logo = 1;
3888                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
3889                                     "%s %d %8phC post del sess\n",
3890                                     __func__, __LINE__, cmd->sess->port_name);
3891
3892                                 qlt_schedule_sess_for_deletion_lock(cmd->sess);
3893                         }
3894                         break;
3895                 }
3896                 case CTIO_DIF_ERROR: {
3897                         struct ctio_crc_from_fw *crc =
3898                                 (struct ctio_crc_from_fw *)ctio;
3899                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3900                             "qla_target(%d): CTIO with DIF_ERROR status %x "
3901                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3902                             "expect_dif[0x%llx]\n",
3903                             vha->vp_idx, status, cmd->state, se_cmd,
3904                             *((u64 *)&crc->actual_dif[0]),
3905                             *((u64 *)&crc->expected_dif[0]));
3906
3907                         qlt_handle_dif_error(vha, cmd, ctio);
3908                         return;
3909                 }
3910                 default:
3911                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3912                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3913                             vha->vp_idx, status, cmd->state, se_cmd);
3914                         break;
3915                 }
3916
3917
3918                 /* "cmd->aborted" means
3919                  * cmd is already aborted/terminated, we don't
3920                  * need to terminate again.  The exchange is already
3921                  * cleaned up/freed at FW level.  Just cleanup at driver
3922                  * level.
3923                  */
3924                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3925                     (!cmd->aborted)) {
3926                         cmd->trc_flags |= TRC_CTIO_ERR;
3927                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3928                                 return;
3929                 }
3930         }
3931
3932         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3933                 cmd->trc_flags |= TRC_CTIO_DONE;
3934         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3935                 cmd->state = QLA_TGT_STATE_DATA_IN;
3936
3937                 if (status == CTIO_SUCCESS)
3938                         cmd->write_data_transferred = 1;
3939
3940                 ha->tgt.tgt_ops->handle_data(cmd);
3941                 return;
3942         } else if (cmd->aborted) {
3943                 cmd->trc_flags |= TRC_CTIO_ABORTED;
3944                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3945                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3946         } else {
3947                 cmd->trc_flags |= TRC_CTIO_STRANGE;
3948                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3949                     "qla_target(%d): A command in state (%d) should "
3950                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3951         }
3952
3953         if (unlikely(status != CTIO_SUCCESS) &&
3954                 !cmd->aborted) {
3955                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3956                 dump_stack();
3957         }
3958
3959         ha->tgt.tgt_ops->free_cmd(cmd);
3960 }
3961
3962 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3963         uint8_t task_codes)
3964 {
3965         int fcp_task_attr;
3966
3967         switch (task_codes) {
3968         case ATIO_SIMPLE_QUEUE:
3969                 fcp_task_attr = TCM_SIMPLE_TAG;
3970                 break;
3971         case ATIO_HEAD_OF_QUEUE:
3972                 fcp_task_attr = TCM_HEAD_TAG;
3973                 break;
3974         case ATIO_ORDERED_QUEUE:
3975                 fcp_task_attr = TCM_ORDERED_TAG;
3976                 break;
3977         case ATIO_ACA_QUEUE:
3978                 fcp_task_attr = TCM_ACA_TAG;
3979                 break;
3980         case ATIO_UNTAGGED:
3981                 fcp_task_attr = TCM_SIMPLE_TAG;
3982                 break;
3983         default:
3984                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3985                     "qla_target: unknown task code %x, use ORDERED instead\n",
3986                     task_codes);
3987                 fcp_task_attr = TCM_ORDERED_TAG;
3988                 break;
3989         }
3990
3991         return fcp_task_attr;
3992 }
3993
3994 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
3995                                         uint8_t *);
3996 /*
3997  * Process context for I/O path into tcm_qla2xxx code
3998  */
3999 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4000 {
4001         scsi_qla_host_t *vha = cmd->vha;
4002         struct qla_hw_data *ha = vha->hw;
4003         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4004         struct fc_port *sess = cmd->sess;
4005         struct atio_from_isp *atio = &cmd->atio;
4006         unsigned char *cdb;
4007         unsigned long flags;
4008         uint32_t data_length;
4009         int ret, fcp_task_attr, data_dir, bidi = 0;
4010
4011         cmd->cmd_in_wq = 0;
4012         cmd->trc_flags |= TRC_DO_WORK;
4013         if (tgt->tgt_stop)
4014                 goto out_term;
4015
4016         if (cmd->aborted) {
4017                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4018                     "cmd with tag %u is aborted\n",
4019                     cmd->atio.u.isp24.exchange_addr);
4020                 goto out_term;
4021         }
4022
4023         spin_lock_init(&cmd->cmd_lock);
4024         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4025         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4026         cmd->unpacked_lun = scsilun_to_int(
4027             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4028
4029         if (atio->u.isp24.fcp_cmnd.rddata &&
4030             atio->u.isp24.fcp_cmnd.wrdata) {
4031                 bidi = 1;
4032                 data_dir = DMA_TO_DEVICE;
4033         } else if (atio->u.isp24.fcp_cmnd.rddata)
4034                 data_dir = DMA_FROM_DEVICE;
4035         else if (atio->u.isp24.fcp_cmnd.wrdata)
4036                 data_dir = DMA_TO_DEVICE;
4037         else
4038                 data_dir = DMA_NONE;
4039
4040         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4041             atio->u.isp24.fcp_cmnd.task_attr);
4042         data_length = be32_to_cpu(get_unaligned((uint32_t *)
4043             &atio->u.isp24.fcp_cmnd.add_cdb[
4044             atio->u.isp24.fcp_cmnd.add_cdb_len]));
4045
4046         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4047                                           fcp_task_attr, data_dir, bidi);
4048         if (ret != 0)
4049                 goto out_term;
4050         /*
4051          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4052          */
4053         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4054         ha->tgt.tgt_ops->put_sess(sess);
4055         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4056         return;
4057
4058 out_term:
4059         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4060         /*
4061          * cmd has not sent to target yet, so pass NULL as the second
4062          * argument to qlt_send_term_exchange() and free the memory here.
4063          */
4064         cmd->trc_flags |= TRC_DO_WORK_ERR;
4065         spin_lock_irqsave(&ha->hardware_lock, flags);
4066         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0);
4067
4068         qlt_decr_num_pend_cmds(vha);
4069         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
4070         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4071
4072         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4073         ha->tgt.tgt_ops->put_sess(sess);
4074         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4075 }
4076
4077 static void qlt_do_work(struct work_struct *work)
4078 {
4079         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4080         scsi_qla_host_t *vha = cmd->vha;
4081         unsigned long flags;
4082
4083         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4084         list_del(&cmd->cmd_list);
4085         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4086
4087         __qlt_do_work(cmd);
4088 }
4089
4090 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4091                                        struct fc_port *sess,
4092                                        struct atio_from_isp *atio)
4093 {
4094         struct se_session *se_sess = sess->se_sess;
4095         struct qla_tgt_cmd *cmd;
4096         int tag;
4097
4098         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4099         if (tag < 0)
4100                 return NULL;
4101
4102         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4103         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4104
4105         memcpy(&cmd->atio, atio, sizeof(*atio));
4106         cmd->state = QLA_TGT_STATE_NEW;
4107         cmd->tgt = vha->vha_tgt.qla_tgt;
4108         qlt_incr_num_pend_cmds(vha);
4109         cmd->vha = vha;
4110         cmd->se_cmd.map_tag = tag;
4111         cmd->sess = sess;
4112         cmd->loop_id = sess->loop_id;
4113         cmd->conf_compl_supported = sess->conf_compl_supported;
4114
4115         cmd->trc_flags = 0;
4116         cmd->jiffies_at_alloc = get_jiffies_64();
4117
4118         cmd->reset_count = vha->hw->chip_reset;
4119
4120         return cmd;
4121 }
4122
4123 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
4124                           uint16_t);
4125
4126 static void qlt_create_sess_from_atio(struct work_struct *work)
4127 {
4128         struct qla_tgt_sess_op *op = container_of(work,
4129                                         struct qla_tgt_sess_op, work);
4130         scsi_qla_host_t *vha = op->vha;
4131         struct qla_hw_data *ha = vha->hw;
4132         struct fc_port *sess;
4133         struct qla_tgt_cmd *cmd;
4134         unsigned long flags;
4135         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
4136
4137         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4138         list_del(&op->cmd_list);
4139         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4140
4141         if (op->aborted) {
4142                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
4143                     "sess_op with tag %u is aborted\n",
4144                     op->atio.u.isp24.exchange_addr);
4145                 goto out_term;
4146         }
4147
4148         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
4149             "qla_target(%d): Unable to find wwn login"
4150             " (s_id %x:%x:%x), trying to create it manually\n",
4151             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
4152
4153         if (op->atio.u.raw.entry_count > 1) {
4154                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
4155                     "Dropping multy entry atio %p\n", &op->atio);
4156                 goto out_term;
4157         }
4158
4159         sess = qlt_make_local_sess(vha, s_id);
4160         /* sess has an extra creation ref. */
4161
4162         if (!sess)
4163                 goto out_term;
4164         /*
4165          * Now obtain a pre-allocated session tag using the original op->atio
4166          * packet header, and dispatch into __qlt_do_work() using the existing
4167          * process context.
4168          */
4169         cmd = qlt_get_tag(vha, sess, &op->atio);
4170         if (!cmd) {
4171                 spin_lock_irqsave(&ha->hardware_lock, flags);
4172                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
4173                 ha->tgt.tgt_ops->put_sess(sess);
4174                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4175                 kfree(op);
4176                 return;
4177         }
4178
4179         /*
4180          * __qlt_do_work() will call qlt_put_sess() to release
4181          * the extra reference taken above by qlt_make_local_sess()
4182          */
4183         __qlt_do_work(cmd);
4184         kfree(op);
4185         return;
4186 out_term:
4187         spin_lock_irqsave(&ha->hardware_lock, flags);
4188         qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0);
4189         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4190         kfree(op);
4191 }
4192
4193 /* ha->hardware_lock supposed to be held on entry */
4194 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4195         struct atio_from_isp *atio)
4196 {
4197         struct qla_hw_data *ha = vha->hw;
4198         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4199         struct fc_port *sess;
4200         struct qla_tgt_cmd *cmd;
4201         unsigned long flags;
4202
4203         if (unlikely(tgt->tgt_stop)) {
4204                 ql_dbg(ql_dbg_io, vha, 0x3061,
4205                     "New command while device %p is shutting down\n", tgt);
4206                 return -EFAULT;
4207         }
4208
4209         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4210         if (unlikely(!sess)) {
4211                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
4212                                                      GFP_ATOMIC);
4213                 if (!op)
4214                         return -ENOMEM;
4215
4216                 memcpy(&op->atio, atio, sizeof(*atio));
4217                 op->vha = vha;
4218
4219                 spin_lock(&vha->cmd_list_lock);
4220                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
4221                 spin_unlock(&vha->cmd_list_lock);
4222
4223                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
4224                 queue_work(qla_tgt_wq, &op->work);
4225                 return 0;
4226         }
4227
4228         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4229          * session deletion, but it's still in sess_del_work wq */
4230         if (sess->deleted) {
4231                 ql_dbg(ql_dbg_io, vha, 0x3061,
4232                     "New command while old session %p is being deleted\n",
4233                     sess);
4234                 return -EFAULT;
4235         }
4236
4237         /*
4238          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4239          */
4240         if (!kref_get_unless_zero(&sess->sess_kref)) {
4241                 ql_dbg(ql_dbg_tgt, vha, 0xffff,
4242                     "%s: kref_get fail, %8phC oxid %x \n",
4243                     __func__, sess->port_name,
4244                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4245                 return -EFAULT;
4246         }
4247
4248         cmd = qlt_get_tag(vha, sess, atio);
4249         if (!cmd) {
4250                 ql_dbg(ql_dbg_io, vha, 0x3062,
4251                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4252                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4253                 ha->tgt.tgt_ops->put_sess(sess);
4254                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4255                 return -ENOMEM;
4256         }
4257
4258         cmd->cmd_in_wq = 1;
4259         cmd->trc_flags |= TRC_NEW_CMD;
4260         cmd->se_cmd.cpuid = ha->msix_count ?
4261                 ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND;
4262
4263         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4264         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4265         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4266
4267         INIT_WORK(&cmd->work, qlt_do_work);
4268         if (ha->msix_count) {
4269                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4270                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4271                             &cmd->work);
4272                 else
4273                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4274                             &cmd->work);
4275         } else {
4276                 queue_work(qla_tgt_wq, &cmd->work);
4277         }
4278         return 0;
4279
4280 }
4281
4282 /* ha->hardware_lock supposed to be held on entry */
4283 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4284         int fn, void *iocb, int flags)
4285 {
4286         struct scsi_qla_host *vha = sess->vha;
4287         struct qla_hw_data *ha = vha->hw;
4288         struct qla_tgt_mgmt_cmd *mcmd;
4289         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4290         int res;
4291
4292         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4293         if (!mcmd) {
4294                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4295                     "qla_target(%d): Allocation of management "
4296                     "command failed, some commands and their data could "
4297                     "leak\n", vha->vp_idx);
4298                 return -ENOMEM;
4299         }
4300         memset(mcmd, 0, sizeof(*mcmd));
4301         mcmd->sess = sess;
4302
4303         if (iocb) {
4304                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4305                     sizeof(mcmd->orig_iocb.imm_ntfy));
4306         }
4307         mcmd->tmr_func = fn;
4308         mcmd->flags = flags;
4309         mcmd->reset_count = vha->hw->chip_reset;
4310
4311         switch (fn) {
4312         case QLA_TGT_LUN_RESET:
4313             abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4314             break;
4315         }
4316
4317         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, mcmd->tmr_func, 0);
4318         if (res != 0) {
4319                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4320                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4321                     sess->vha->vp_idx, res);
4322                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4323                 return -EFAULT;
4324         }
4325
4326         return 0;
4327 }
4328
4329 /* ha->hardware_lock supposed to be held on entry */
4330 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4331 {
4332         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4333         struct qla_hw_data *ha = vha->hw;
4334         struct qla_tgt *tgt;
4335         struct fc_port *sess;
4336         uint32_t lun, unpacked_lun;
4337         int fn;
4338         unsigned long flags;
4339
4340         tgt = vha->vha_tgt.qla_tgt;
4341
4342         lun = a->u.isp24.fcp_cmnd.lun;
4343         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4344
4345         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4346         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4347             a->u.isp24.fcp_hdr.s_id);
4348         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4349
4350         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4351
4352         if (!sess) {
4353                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4354                     "qla_target(%d): task mgmt fn 0x%x for "
4355                     "non-existant session\n", vha->vp_idx, fn);
4356                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4357                     sizeof(struct atio_from_isp));
4358         }
4359
4360         if (sess->deleted)
4361                 return -EFAULT;
4362
4363         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4364 }
4365
4366 /* ha->hardware_lock supposed to be held on entry */
4367 static int __qlt_abort_task(struct scsi_qla_host *vha,
4368         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4369 {
4370         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4371         struct qla_hw_data *ha = vha->hw;
4372         struct qla_tgt_mgmt_cmd *mcmd;
4373         uint32_t lun, unpacked_lun;
4374         int rc;
4375
4376         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4377         if (mcmd == NULL) {
4378                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4379                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4380                     vha->vp_idx, __func__);
4381                 return -ENOMEM;
4382         }
4383         memset(mcmd, 0, sizeof(*mcmd));
4384
4385         mcmd->sess = sess;
4386         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4387             sizeof(mcmd->orig_iocb.imm_ntfy));
4388
4389         lun = a->u.isp24.fcp_cmnd.lun;
4390         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4391         mcmd->reset_count = vha->hw->chip_reset;
4392         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4393
4394         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4395             le16_to_cpu(iocb->u.isp2x.seq_id));
4396         if (rc != 0) {
4397                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4398                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4399                     vha->vp_idx, rc);
4400                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4401                 return -EFAULT;
4402         }
4403
4404         return 0;
4405 }
4406
4407 /* ha->hardware_lock supposed to be held on entry */
4408 static int qlt_abort_task(struct scsi_qla_host *vha,
4409         struct imm_ntfy_from_isp *iocb)
4410 {
4411         struct qla_hw_data *ha = vha->hw;
4412         struct fc_port *sess;
4413         int loop_id;
4414         unsigned long flags;
4415
4416         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4417
4418         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4419         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4420         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4421
4422         if (sess == NULL) {
4423                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4424                     "qla_target(%d): task abort for unexisting "
4425                     "session\n", vha->vp_idx);
4426                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4427                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4428         }
4429
4430         return __qlt_abort_task(vha, iocb, sess);
4431 }
4432
4433 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4434 {
4435         if (rc != MBS_COMMAND_COMPLETE) {
4436                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4437                         "%s: se_sess %p / sess %p from"
4438                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4439                         " LOGO failed: %#x\n",
4440                         __func__,
4441                         fcport->se_sess,
4442                         fcport,
4443                         fcport->port_name, fcport->loop_id,
4444                         fcport->d_id.b.domain, fcport->d_id.b.area,
4445                         fcport->d_id.b.al_pa, rc);
4446         }
4447
4448         fcport->logout_completed = 1;
4449 }
4450
4451 /*
4452 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4453 *
4454 * Schedules sessions with matching port_id/loop_id but different wwn for
4455 * deletion. Returns existing session with matching wwn if present.
4456 * Null otherwise.
4457 */
4458 struct fc_port *
4459 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4460     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4461 {
4462         struct fc_port *sess = NULL, *other_sess;
4463         uint64_t other_wwn;
4464
4465         *conflict_sess = NULL;
4466
4467         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4468
4469                 other_wwn = wwn_to_u64(other_sess->port_name);
4470
4471                 if (wwn == other_wwn) {
4472                         WARN_ON(sess);
4473                         sess = other_sess;
4474                         continue;
4475                 }
4476
4477                 /* find other sess with nport_id collision */
4478                 if (port_id.b24 == other_sess->d_id.b24) {
4479                         if (loop_id != other_sess->loop_id) {
4480                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4481                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4482                                     other_sess, other_sess->loop_id, other_wwn);
4483
4484                                 /*
4485                                  * logout_on_delete is set by default, but another
4486                                  * session that has the same s_id/loop_id combo
4487                                  * might have cleared it when requested this session
4488                                  * deletion, so don't touch it
4489                                  */
4490                                 qlt_schedule_sess_for_deletion(other_sess, true);
4491                         } else {
4492                                 /*
4493                                  * Another wwn used to have our s_id/loop_id
4494                                  * kill the session, but don't free the loop_id
4495                                  */
4496                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
4497                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4498                                     other_sess, other_sess->loop_id, other_wwn);
4499
4500
4501                                 other_sess->keep_nport_handle = 1;
4502                                 *conflict_sess = other_sess;
4503                                 qlt_schedule_sess_for_deletion(other_sess,
4504                                     true);
4505                         }
4506                         continue;
4507                 }
4508
4509                 /* find other sess with nport handle collision */
4510                 if ((loop_id == other_sess->loop_id) &&
4511                         (loop_id != FC_NO_LOOP_ID)) {
4512                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4513                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4514                                other_sess, other_sess->loop_id, other_wwn);
4515
4516                         /* Same loop_id but different s_id
4517                          * Ok to kill and logout */
4518                         qlt_schedule_sess_for_deletion(other_sess, true);
4519                 }
4520         }
4521
4522         return sess;
4523 }
4524
4525 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4526 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4527 {
4528         struct qla_tgt_sess_op *op;
4529         struct qla_tgt_cmd *cmd;
4530         uint32_t key;
4531         int count = 0;
4532
4533         key = (((u32)s_id->b.domain << 16) |
4534                ((u32)s_id->b.area   <<  8) |
4535                ((u32)s_id->b.al_pa));
4536
4537         spin_lock(&vha->cmd_list_lock);
4538         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4539                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4540
4541                 if (op_key == key) {
4542                         op->aborted = true;
4543                         count++;
4544                 }
4545         }
4546
4547         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4548                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4549                 if (op_key == key) {
4550                         op->aborted = true;
4551                         count++;
4552                 }
4553         }
4554
4555         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4556                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4557                 if (cmd_key == key) {
4558                         cmd->aborted = 1;
4559                         count++;
4560                 }
4561         }
4562         spin_unlock(&vha->cmd_list_lock);
4563
4564         return count;
4565 }
4566
4567 /*
4568  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4569  */
4570 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4571         struct imm_ntfy_from_isp *iocb)
4572 {
4573         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4574         struct qla_hw_data *ha = vha->hw;
4575         struct fc_port *sess = NULL, *conflict_sess = NULL;
4576         uint64_t wwn;
4577         port_id_t port_id;
4578         uint16_t loop_id;
4579         uint16_t wd3_lo;
4580         int res = 0;
4581         struct qlt_plogi_ack_t *pla;
4582         unsigned long flags;
4583
4584         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4585
4586         port_id.b.domain = iocb->u.isp24.port_id[2];
4587         port_id.b.area   = iocb->u.isp24.port_id[1];
4588         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4589         port_id.b.rsvd_1 = 0;
4590
4591         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4592
4593         ql_dbg(ql_dbg_disc, vha, 0xf026,
4594             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4595             vha->vp_idx, iocb->u.isp24.port_id[2],
4596                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4597                    iocb->u.isp24.status_subcode, loop_id,
4598                 iocb->u.isp24.port_name);
4599
4600         /* res = 1 means ack at the end of thread
4601          * res = 0 means ack async/later.
4602          */
4603         switch (iocb->u.isp24.status_subcode) {
4604         case ELS_PLOGI:
4605
4606                 /* Mark all stale commands in qla_tgt_wq for deletion */
4607                 abort_cmds_for_s_id(vha, &port_id);
4608
4609                 if (wwn) {
4610                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4611                         sess = qlt_find_sess_invalidate_other(vha, wwn,
4612                                 port_id, loop_id, &conflict_sess);
4613                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4614                 }
4615
4616                 if (IS_SW_RESV_ADDR(port_id)) {
4617                         res = 1;
4618                         break;
4619                 }
4620
4621                 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4622                 if (!pla) {
4623                         qlt_send_term_imm_notif(vha, iocb, 1);
4624                         break;
4625                 }
4626
4627                 res = 0;
4628
4629                 if (conflict_sess) {
4630                         conflict_sess->login_gen++;
4631                         qlt_plogi_ack_link(vha, pla, conflict_sess,
4632                                 QLT_PLOGI_LINK_CONFLICT);
4633                 }
4634
4635                 if (!sess) {
4636                         pla->ref_count++;
4637                         qla24xx_post_newsess_work(vha, &port_id,
4638                                 iocb->u.isp24.port_name, pla);
4639                         res = 0;
4640                         break;
4641                 }
4642
4643                 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4644                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4645                 sess->d_id = port_id;
4646                 sess->login_gen++;
4647
4648                 switch (sess->disc_state) {
4649                 case DSC_DELETED:
4650                         qlt_plogi_ack_unref(vha, pla);
4651                         break;
4652
4653                 default:
4654                         /*
4655                          * Under normal circumstances we want to release nport handle
4656                          * during LOGO process to avoid nport handle leaks inside FW.
4657                          * The exception is when LOGO is done while another PLOGI with
4658                          * the same nport handle is waiting as might be the case here.
4659                          * Note: there is always a possibily of a race where session
4660                          * deletion has already started for other reasons (e.g. ACL
4661                          * removal) and now PLOGI arrives:
4662                          * 1. if PLOGI arrived in FW after nport handle has been freed,
4663                          *    FW must have assigned this PLOGI a new/same handle and we
4664                          *    can proceed ACK'ing it as usual when session deletion
4665                          *    completes.
4666                          * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4667                          *    bit reached it, the handle has now been released. We'll
4668                          *    get an error when we ACK this PLOGI. Nothing will be sent
4669                          *    back to initiator. Initiator should eventually retry
4670                          *    PLOGI and situation will correct itself.
4671                          */
4672                         sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4673                            (sess->d_id.b24 == port_id.b24));
4674
4675                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4676                                    "%s %d %8phC post del sess\n",
4677                                    __func__, __LINE__, sess->port_name);
4678
4679
4680                         qlt_schedule_sess_for_deletion_lock(sess);
4681                         break;
4682                 }
4683
4684                 break;
4685
4686         case ELS_PRLI:
4687                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4688
4689                 if (wwn) {
4690                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4691                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4692                                 loop_id, &conflict_sess);
4693                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4694                 }
4695
4696                 if (conflict_sess) {
4697                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4698                             "PRLI with conflicting sess %p port %8phC\n",
4699                             conflict_sess, conflict_sess->port_name);
4700                         qlt_send_term_imm_notif(vha, iocb, 1);
4701                         res = 0;
4702                         break;
4703                 }
4704
4705                 if (sess != NULL) {
4706                         if (sess->fw_login_state != DSC_LS_PLOGI_PEND &&
4707                             sess->fw_login_state != DSC_LS_PLOGI_COMP) {
4708                                 /*
4709                                  * Impatient initiator sent PRLI before last
4710                                  * PLOGI could finish. Will force him to re-try,
4711                                  * while last one finishes.
4712                                  */
4713                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4714                                     "sess %p PRLI received, before plogi ack.\n",
4715                                     sess);
4716                                 qlt_send_term_imm_notif(vha, iocb, 1);
4717                                 res = 0;
4718                                 break;
4719                         }
4720
4721                         /*
4722                          * This shouldn't happen under normal circumstances,
4723                          * since we have deleted the old session during PLOGI
4724                          */
4725                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4726                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4727                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4728
4729                         sess->local = 0;
4730                         sess->loop_id = loop_id;
4731                         sess->d_id = port_id;
4732                         sess->fw_login_state = DSC_LS_PRLI_PEND;
4733
4734                         if (wd3_lo & BIT_7)
4735                                 sess->conf_compl_supported = 1;
4736
4737                         if ((wd3_lo & BIT_4) == 0)
4738                                 sess->port_type = FCT_INITIATOR;
4739                         else
4740                                 sess->port_type = FCT_TARGET;
4741                 }
4742                 res = 1; /* send notify ack */
4743
4744                 /* Make session global (not used in fabric mode) */
4745                 if (ha->current_topology != ISP_CFG_F) {
4746                         if (sess) {
4747                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4748                                     "%s %d %8phC post nack\n",
4749                                     __func__, __LINE__, sess->port_name);
4750                                 qla24xx_post_nack_work(vha, sess, iocb,
4751                                         SRB_NACK_PRLI);
4752                                 res = 0;
4753                         } else {
4754                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4755                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4756                                 qla2xxx_wake_dpc(vha);
4757                         }
4758                 } else {
4759                         if (sess) {
4760                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4761                                     "%s %d %8phC post nack\n",
4762                                     __func__, __LINE__, sess->port_name);
4763                                 qla24xx_post_nack_work(vha, sess, iocb,
4764                                         SRB_NACK_PRLI);
4765                                 res = 0;
4766                         }
4767                 }
4768                 break;
4769
4770         case ELS_TPRLO:
4771                 if (le16_to_cpu(iocb->u.isp24.flags) &
4772                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
4773                         loop_id = 0xFFFF;
4774                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
4775                         res = 1;
4776                         break;
4777                 }
4778                 /* drop through */
4779         case ELS_LOGO:
4780         case ELS_PRLO:
4781                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4782                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
4783                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4784
4785                 if (sess) {
4786                         sess->login_gen++;
4787                         sess->fw_login_state = DSC_LS_LOGO_PEND;
4788                         sess->logo_ack_needed = 1;
4789                         memcpy(sess->iocb, iocb, IOCB_SIZE);
4790                 }
4791
4792                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4793
4794                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4795                     "%s: logo %llx res %d sess %p ",
4796                     __func__, wwn, res, sess);
4797                 if (res == 0) {
4798                         /*
4799                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
4800                          * for LOGO_ACK & sess delete
4801                          */
4802                         BUG_ON(!sess);
4803                         res = 0;
4804                 } else {
4805                         /* cmd did not go to upper layer. */
4806                         if (sess) {
4807                                 qlt_schedule_sess_for_deletion_lock(sess);
4808                                 res = 0;
4809                         }
4810                         /* else logo will be ack */
4811                 }
4812                 break;
4813         case ELS_PDISC:
4814         case ELS_ADISC:
4815         {
4816                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4817                 if (tgt->link_reinit_iocb_pending) {
4818                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4819                             0, 0, 0, 0, 0, 0);
4820                         tgt->link_reinit_iocb_pending = 0;
4821                 }
4822
4823                 sess = qla2x00_find_fcport_by_wwpn(vha,
4824                     iocb->u.isp24.port_name, 1);
4825                 if (sess) {
4826                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4827                                 "sess %p lid %d|%d DS %d LS %d\n",
4828                                 sess, sess->loop_id, loop_id,
4829                                 sess->disc_state, sess->fw_login_state);
4830                 }
4831
4832                 res = 1; /* send notify ack */
4833                 break;
4834         }
4835
4836         case ELS_FLOGI: /* should never happen */
4837         default:
4838                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4839                     "qla_target(%d): Unsupported ELS command %x "
4840                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4841                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4842                 break;
4843         }
4844
4845         return res;
4846 }
4847
4848 /*
4849  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4850  */
4851 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4852         struct imm_ntfy_from_isp *iocb)
4853 {
4854         struct qla_hw_data *ha = vha->hw;
4855         uint32_t add_flags = 0;
4856         int send_notify_ack = 1;
4857         uint16_t status;
4858
4859         status = le16_to_cpu(iocb->u.isp2x.status);
4860         switch (status) {
4861         case IMM_NTFY_LIP_RESET:
4862         {
4863                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4864                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4865                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4866                     iocb->u.isp24.status_subcode);
4867
4868                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4869                         send_notify_ack = 0;
4870                 break;
4871         }
4872
4873         case IMM_NTFY_LIP_LINK_REINIT:
4874         {
4875                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4876                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4877                     "qla_target(%d): LINK REINIT (loop %#x, "
4878                     "subcode %x)\n", vha->vp_idx,
4879                     le16_to_cpu(iocb->u.isp24.nport_handle),
4880                     iocb->u.isp24.status_subcode);
4881                 if (tgt->link_reinit_iocb_pending) {
4882                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4883                             0, 0, 0, 0, 0, 0);
4884                 }
4885                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4886                 tgt->link_reinit_iocb_pending = 1;
4887                 /*
4888                  * QLogic requires to wait after LINK REINIT for possible
4889                  * PDISC or ADISC ELS commands
4890                  */
4891                 send_notify_ack = 0;
4892                 break;
4893         }
4894
4895         case IMM_NTFY_PORT_LOGOUT:
4896                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4897                     "qla_target(%d): Port logout (loop "
4898                     "%#x, subcode %x)\n", vha->vp_idx,
4899                     le16_to_cpu(iocb->u.isp24.nport_handle),
4900                     iocb->u.isp24.status_subcode);
4901
4902                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4903                         send_notify_ack = 0;
4904                 /* The sessions will be cleared in the callback, if needed */
4905                 break;
4906
4907         case IMM_NTFY_GLBL_TPRLO:
4908                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4909                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4910                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4911                         send_notify_ack = 0;
4912                 /* The sessions will be cleared in the callback, if needed */
4913                 break;
4914
4915         case IMM_NTFY_PORT_CONFIG:
4916                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4917                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4918                     status);
4919                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4920                         send_notify_ack = 0;
4921                 /* The sessions will be cleared in the callback, if needed */
4922                 break;
4923
4924         case IMM_NTFY_GLBL_LOGO:
4925                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4926                     "qla_target(%d): Link failure detected\n",
4927                     vha->vp_idx);
4928                 /* I_T nexus loss */
4929                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4930                         send_notify_ack = 0;
4931                 break;
4932
4933         case IMM_NTFY_IOCB_OVERFLOW:
4934                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4935                     "qla_target(%d): Cannot provide requested "
4936                     "capability (IOCB overflowed the immediate notify "
4937                     "resource count)\n", vha->vp_idx);
4938                 break;
4939
4940         case IMM_NTFY_ABORT_TASK:
4941                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4942                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4943                     "L %#x)\n", vha->vp_idx,
4944                     le16_to_cpu(iocb->u.isp2x.seq_id),
4945                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4946                     le16_to_cpu(iocb->u.isp2x.lun));
4947                 if (qlt_abort_task(vha, iocb) == 0)
4948                         send_notify_ack = 0;
4949                 break;
4950
4951         case IMM_NTFY_RESOURCE:
4952                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4953                     "qla_target(%d): Out of resources, host %ld\n",
4954                     vha->vp_idx, vha->host_no);
4955                 break;
4956
4957         case IMM_NTFY_MSG_RX:
4958                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4959                     "qla_target(%d): Immediate notify task %x\n",
4960                     vha->vp_idx, iocb->u.isp2x.task_flags);
4961                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4962                         send_notify_ack = 0;
4963                 break;
4964
4965         case IMM_NTFY_ELS:
4966                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4967                         send_notify_ack = 0;
4968                 break;
4969         default:
4970                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4971                     "qla_target(%d): Received unknown immediate "
4972                     "notify status %x\n", vha->vp_idx, status);
4973                 break;
4974         }
4975
4976         if (send_notify_ack)
4977                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4978 }
4979
4980 /*
4981  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4982  * This function sends busy to ISP 2xxx or 24xx.
4983  */
4984 static int __qlt_send_busy(struct scsi_qla_host *vha,
4985         struct atio_from_isp *atio, uint16_t status)
4986 {
4987         struct ctio7_to_24xx *ctio24;
4988         struct qla_hw_data *ha = vha->hw;
4989         request_t *pkt;
4990         struct fc_port *sess = NULL;
4991         unsigned long flags;
4992
4993         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4994         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4995             atio->u.isp24.fcp_hdr.s_id);
4996         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4997         if (!sess) {
4998                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
4999                 return 0;
5000         }
5001         /* Sending marker isn't necessary, since we called from ISR */
5002
5003         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
5004         if (!pkt) {
5005                 ql_dbg(ql_dbg_io, vha, 0x3063,
5006                     "qla_target(%d): %s failed: unable to allocate "
5007                     "request packet", vha->vp_idx, __func__);
5008                 return -ENOMEM;
5009         }
5010
5011         vha->tgt_counters.num_q_full_sent++;
5012         pkt->entry_count = 1;
5013         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5014
5015         ctio24 = (struct ctio7_to_24xx *)pkt;
5016         ctio24->entry_type = CTIO_TYPE7;
5017         ctio24->nport_handle = sess->loop_id;
5018         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5019         ctio24->vp_index = vha->vp_idx;
5020         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5021         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5022         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5023         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5024         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
5025             cpu_to_le16(
5026                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5027                 CTIO7_FLAGS_DONT_RET_CTIO);
5028         /*
5029          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5030          * if the explicit conformation is used.
5031          */
5032         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5033         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5034         /* Memory Barrier */
5035         wmb();
5036         qla2x00_start_iocbs(vha, vha->req);
5037         return 0;
5038 }
5039
5040 /*
5041  * This routine is used to allocate a command for either a QFull condition
5042  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5043  * out previously.
5044  */
5045 static void
5046 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5047         struct atio_from_isp *atio, uint16_t status, int qfull)
5048 {
5049         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5050         struct qla_hw_data *ha = vha->hw;
5051         struct fc_port *sess;
5052         struct se_session *se_sess;
5053         struct qla_tgt_cmd *cmd;
5054         int tag;
5055
5056         if (unlikely(tgt->tgt_stop)) {
5057                 ql_dbg(ql_dbg_io, vha, 0x300a,
5058                         "New command while device %p is shutting down\n", tgt);
5059                 return;
5060         }
5061
5062         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5063                 vha->hw->tgt.num_qfull_cmds_dropped++;
5064                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5065                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5066                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5067                                 vha->hw->tgt.num_qfull_cmds_dropped;
5068
5069                 ql_dbg(ql_dbg_io, vha, 0x3068,
5070                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5071                         vha->vp_idx, __func__,
5072                         vha->hw->tgt.num_qfull_cmds_dropped);
5073
5074                 qlt_chk_exch_leak_thresh_hold(vha);
5075                 return;
5076         }
5077
5078         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5079                 (vha, atio->u.isp24.fcp_hdr.s_id);
5080         if (!sess)
5081                 return;
5082
5083         se_sess = sess->se_sess;
5084
5085         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5086         if (tag < 0)
5087                 return;
5088
5089         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5090         if (!cmd) {
5091                 ql_dbg(ql_dbg_io, vha, 0x3009,
5092                         "qla_target(%d): %s: Allocation of cmd failed\n",
5093                         vha->vp_idx, __func__);
5094
5095                 vha->hw->tgt.num_qfull_cmds_dropped++;
5096                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5097                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5098                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5099                                 vha->hw->tgt.num_qfull_cmds_dropped;
5100
5101                 qlt_chk_exch_leak_thresh_hold(vha);
5102                 return;
5103         }
5104
5105         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5106
5107         qlt_incr_num_pend_cmds(vha);
5108         INIT_LIST_HEAD(&cmd->cmd_list);
5109         memcpy(&cmd->atio, atio, sizeof(*atio));
5110
5111         cmd->tgt = vha->vha_tgt.qla_tgt;
5112         cmd->vha = vha;
5113         cmd->reset_count = vha->hw->chip_reset;
5114         cmd->q_full = 1;
5115
5116         if (qfull) {
5117                 cmd->q_full = 1;
5118                 /* NOTE: borrowing the state field to carry the status */
5119                 cmd->state = status;
5120         } else
5121                 cmd->term_exchg = 1;
5122
5123         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5124
5125         vha->hw->tgt.num_qfull_cmds_alloc++;
5126         if (vha->hw->tgt.num_qfull_cmds_alloc >
5127                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5128                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5129                         vha->hw->tgt.num_qfull_cmds_alloc;
5130 }
5131
5132 int
5133 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5134 {
5135         struct qla_hw_data *ha = vha->hw;
5136         unsigned long flags;
5137         struct qla_tgt_cmd *cmd, *tcmd;
5138         struct list_head free_list;
5139         int rc = 0;
5140
5141         if (list_empty(&ha->tgt.q_full_list))
5142                 return 0;
5143
5144         INIT_LIST_HEAD(&free_list);
5145
5146         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5147
5148         if (list_empty(&ha->tgt.q_full_list)) {
5149                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5150                 return 0;
5151         }
5152
5153         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5154                 if (cmd->q_full)
5155                         /* cmd->state is a borrowed field to hold status */
5156                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5157                 else if (cmd->term_exchg)
5158                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5159
5160                 if (rc == -ENOMEM)
5161                         break;
5162
5163                 if (cmd->q_full)
5164                         ql_dbg(ql_dbg_io, vha, 0x3006,
5165                             "%s: busy sent for ox_id[%04x]\n", __func__,
5166                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5167                 else if (cmd->term_exchg)
5168                         ql_dbg(ql_dbg_io, vha, 0x3007,
5169                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5170                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5171                 else
5172                         ql_dbg(ql_dbg_io, vha, 0x3008,
5173                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5174                             cmd);
5175
5176                 list_del(&cmd->cmd_list);
5177                 list_add_tail(&cmd->cmd_list, &free_list);
5178
5179                 /* piggy back on hardware_lock for protection */
5180                 vha->hw->tgt.num_qfull_cmds_alloc--;
5181         }
5182         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5183
5184         cmd = NULL;
5185
5186         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5187                 list_del(&cmd->cmd_list);
5188                 /* This cmd was never sent to TCM.  There is no need
5189                  * to schedule free or call free_cmd
5190                  */
5191                 qlt_free_cmd(cmd);
5192         }
5193         return rc;
5194 }
5195
5196 static void
5197 qlt_send_busy(struct scsi_qla_host *vha,
5198         struct atio_from_isp *atio, uint16_t status)
5199 {
5200         int rc = 0;
5201
5202         rc = __qlt_send_busy(vha, atio, status);
5203         if (rc == -ENOMEM)
5204                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5205 }
5206
5207 static int
5208 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5209         struct atio_from_isp *atio, bool ha_locked)
5210 {
5211         struct qla_hw_data *ha = vha->hw;
5212         uint16_t status;
5213         unsigned long flags;
5214
5215         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5216                 return 0;
5217
5218         if (!ha_locked)
5219                 spin_lock_irqsave(&ha->hardware_lock, flags);
5220         status = temp_sam_status;
5221         qlt_send_busy(vha, atio, status);
5222         if (!ha_locked)
5223                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5224
5225         return 1;
5226 }
5227
5228 /* ha->hardware_lock supposed to be held on entry */
5229 /* called via callback from qla2xxx */
5230 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5231         struct atio_from_isp *atio, uint8_t ha_locked)
5232 {
5233         struct qla_hw_data *ha = vha->hw;
5234         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5235         int rc;
5236         unsigned long flags;
5237
5238         if (unlikely(tgt == NULL)) {
5239                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5240                     "ATIO pkt, but no tgt (ha %p)", ha);
5241                 return;
5242         }
5243         /*
5244          * In tgt_stop mode we also should allow all requests to pass.
5245          * Otherwise, some commands can stuck.
5246          */
5247
5248         tgt->atio_irq_cmd_count++;
5249
5250         switch (atio->u.raw.entry_type) {
5251         case ATIO_TYPE7:
5252                 if (unlikely(atio->u.isp24.exchange_addr ==
5253                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5254                         ql_dbg(ql_dbg_io, vha, 0x3065,
5255                             "qla_target(%d): ATIO_TYPE7 "
5256                             "received with UNKNOWN exchange address, "
5257                             "sending QUEUE_FULL\n", vha->vp_idx);
5258                         if (!ha_locked)
5259                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5260                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5261                         if (!ha_locked)
5262                                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5263                         break;
5264                 }
5265
5266
5267
5268                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5269                         rc = qlt_chk_qfull_thresh_hold(vha, atio, ha_locked);
5270                         if (rc != 0) {
5271                                 tgt->atio_irq_cmd_count--;
5272                                 return;
5273                         }
5274                         rc = qlt_handle_cmd_for_atio(vha, atio);
5275                 } else {
5276                         rc = qlt_handle_task_mgmt(vha, atio);
5277                 }
5278                 if (unlikely(rc != 0)) {
5279                         if (rc == -ESRCH) {
5280                                 if (!ha_locked)
5281                                         spin_lock_irqsave
5282                                                 (&ha->hardware_lock, flags);
5283
5284 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5285                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5286 #else
5287                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5288 #endif
5289
5290                                 if (!ha_locked)
5291                                         spin_unlock_irqrestore
5292                                                 (&ha->hardware_lock, flags);
5293
5294                         } else {
5295                                 if (tgt->tgt_stop) {
5296                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5297                                             "qla_target: Unable to send "
5298                                             "command to target for req, "
5299                                             "ignoring.\n");
5300                                 } else {
5301                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5302                                             "qla_target(%d): Unable to send "
5303                                             "command to target, sending BUSY "
5304                                             "status.\n", vha->vp_idx);
5305                                         if (!ha_locked)
5306                                                 spin_lock_irqsave(
5307                                                     &ha->hardware_lock, flags);
5308                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5309                                         if (!ha_locked)
5310                                                 spin_unlock_irqrestore(
5311                                                     &ha->hardware_lock, flags);
5312                                 }
5313                         }
5314                 }
5315                 break;
5316
5317         case IMMED_NOTIFY_TYPE:
5318         {
5319                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5320                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5321                             "qla_target(%d): Received ATIO packet %x "
5322                             "with error status %x\n", vha->vp_idx,
5323                             atio->u.raw.entry_type,
5324                             atio->u.isp2x.entry_status);
5325                         break;
5326                 }
5327                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5328
5329                 if (!ha_locked)
5330                         spin_lock_irqsave(&ha->hardware_lock, flags);
5331                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5332                 if (!ha_locked)
5333                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5334                 break;
5335         }
5336
5337         default:
5338                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5339                     "qla_target(%d): Received unknown ATIO atio "
5340                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5341                 break;
5342         }
5343
5344         tgt->atio_irq_cmd_count--;
5345 }
5346
5347 /* ha->hardware_lock supposed to be held on entry */
5348 /* called via callback from qla2xxx */
5349 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5350 {
5351         struct qla_hw_data *ha = vha->hw;
5352         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5353
5354         if (unlikely(tgt == NULL)) {
5355                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5356                     "qla_target(%d): Response pkt %x received, but no "
5357                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5358                 return;
5359         }
5360
5361         /*
5362          * In tgt_stop mode we also should allow all requests to pass.
5363          * Otherwise, some commands can stuck.
5364          */
5365
5366         tgt->irq_cmd_count++;
5367
5368         switch (pkt->entry_type) {
5369         case CTIO_CRC2:
5370         case CTIO_TYPE7:
5371         {
5372                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5373                 qlt_do_ctio_completion(vha, entry->handle,
5374                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5375                     entry);
5376                 break;
5377         }
5378
5379         case ACCEPT_TGT_IO_TYPE:
5380         {
5381                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5382                 int rc;
5383                 if (atio->u.isp2x.status !=
5384                     cpu_to_le16(ATIO_CDB_VALID)) {
5385                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5386                             "qla_target(%d): ATIO with error "
5387                             "status %x received\n", vha->vp_idx,
5388                             le16_to_cpu(atio->u.isp2x.status));
5389                         break;
5390                 }
5391
5392                 rc = qlt_chk_qfull_thresh_hold(vha, atio, true);
5393                 if (rc != 0) {
5394                         tgt->irq_cmd_count--;
5395                         return;
5396                 }
5397
5398                 rc = qlt_handle_cmd_for_atio(vha, atio);
5399                 if (unlikely(rc != 0)) {
5400                         if (rc == -ESRCH) {
5401 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5402                                 qlt_send_busy(vha, atio, 0);
5403 #else
5404                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5405 #endif
5406                         } else {
5407                                 if (tgt->tgt_stop) {
5408                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5409                                             "qla_target: Unable to send "
5410                                             "command to target, sending TERM "
5411                                             "EXCHANGE for rsp\n");
5412                                         qlt_send_term_exchange(vha, NULL,
5413                                             atio, 1, 0);
5414                                 } else {
5415                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5416                                             "qla_target(%d): Unable to send "
5417                                             "command to target, sending BUSY "
5418                                             "status\n", vha->vp_idx);
5419                                         qlt_send_busy(vha, atio, 0);
5420                                 }
5421                         }
5422                 }
5423         }
5424         break;
5425
5426         case CONTINUE_TGT_IO_TYPE:
5427         {
5428                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5429                 qlt_do_ctio_completion(vha, entry->handle,
5430                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5431                     entry);
5432                 break;
5433         }
5434
5435         case CTIO_A64_TYPE:
5436         {
5437                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5438                 qlt_do_ctio_completion(vha, entry->handle,
5439                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5440                     entry);
5441                 break;
5442         }
5443
5444         case IMMED_NOTIFY_TYPE:
5445                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5446                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5447                 break;
5448
5449         case NOTIFY_ACK_TYPE:
5450                 if (tgt->notify_ack_expected > 0) {
5451                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5452                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5453                             "NOTIFY_ACK seq %08x status %x\n",
5454                             le16_to_cpu(entry->u.isp2x.seq_id),
5455                             le16_to_cpu(entry->u.isp2x.status));
5456                         tgt->notify_ack_expected--;
5457                         if (entry->u.isp2x.status !=
5458                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5459                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5460                                     "qla_target(%d): NOTIFY_ACK "
5461                                     "failed %x\n", vha->vp_idx,
5462                                     le16_to_cpu(entry->u.isp2x.status));
5463                         }
5464                 } else {
5465                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5466                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5467                             vha->vp_idx);
5468                 }
5469                 break;
5470
5471         case ABTS_RECV_24XX:
5472                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5473                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5474                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5475                 break;
5476
5477         case ABTS_RESP_24XX:
5478                 if (tgt->abts_resp_expected > 0) {
5479                         struct abts_resp_from_24xx_fw *entry =
5480                                 (struct abts_resp_from_24xx_fw *)pkt;
5481                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5482                             "ABTS_RESP_24XX: compl_status %x\n",
5483                             entry->compl_status);
5484                         tgt->abts_resp_expected--;
5485                         if (le16_to_cpu(entry->compl_status) !=
5486                             ABTS_RESP_COMPL_SUCCESS) {
5487                                 if ((entry->error_subcode1 == 0x1E) &&
5488                                     (entry->error_subcode2 == 0)) {
5489                                         /*
5490                                          * We've got a race here: aborted
5491                                          * exchange not terminated, i.e.
5492                                          * response for the aborted command was
5493                                          * sent between the abort request was
5494                                          * received and processed.
5495                                          * Unfortunately, the firmware has a
5496                                          * silly requirement that all aborted
5497                                          * exchanges must be explicitely
5498                                          * terminated, otherwise it refuses to
5499                                          * send responses for the abort
5500                                          * requests. So, we have to
5501                                          * (re)terminate the exchange and retry
5502                                          * the abort response.
5503                                          */
5504                                         qlt_24xx_retry_term_exchange(vha,
5505                                             entry);
5506                                 } else
5507                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5508                                             "qla_target(%d): ABTS_RESP_24XX "
5509                                             "failed %x (subcode %x:%x)",
5510                                             vha->vp_idx, entry->compl_status,
5511                                             entry->error_subcode1,
5512                                             entry->error_subcode2);
5513                         }
5514                 } else {
5515                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5516                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5517                             "received\n", vha->vp_idx);
5518                 }
5519                 break;
5520
5521         default:
5522                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5523                     "qla_target(%d): Received unknown response pkt "
5524                     "type %x\n", vha->vp_idx, pkt->entry_type);
5525                 break;
5526         }
5527
5528         tgt->irq_cmd_count--;
5529 }
5530
5531 /*
5532  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5533  */
5534 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5535         uint16_t *mailbox)
5536 {
5537         struct qla_hw_data *ha = vha->hw;
5538         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5539         int login_code;
5540
5541         if (!ha->tgt.tgt_ops)
5542                 return;
5543
5544         if (unlikely(tgt == NULL)) {
5545                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5546                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5547                 return;
5548         }
5549
5550         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5551             IS_QLA2100(ha))
5552                 return;
5553         /*
5554          * In tgt_stop mode we also should allow all requests to pass.
5555          * Otherwise, some commands can stuck.
5556          */
5557
5558         tgt->irq_cmd_count++;
5559
5560         switch (code) {
5561         case MBA_RESET:                 /* Reset */
5562         case MBA_SYSTEM_ERR:            /* System Error */
5563         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5564         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5565                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5566                     "qla_target(%d): System error async event %#x "
5567                     "occurred", vha->vp_idx, code);
5568                 break;
5569         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5570                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5571                 break;
5572
5573         case MBA_LOOP_UP:
5574         {
5575                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5576                     "qla_target(%d): Async LOOP_UP occurred "
5577                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5578                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5579                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5580                 if (tgt->link_reinit_iocb_pending) {
5581                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5582                             0, 0, 0, 0, 0, 0);
5583                         tgt->link_reinit_iocb_pending = 0;
5584                 }
5585                 break;
5586         }
5587
5588         case MBA_LIP_OCCURRED:
5589         case MBA_LOOP_DOWN:
5590         case MBA_LIP_RESET:
5591         case MBA_RSCN_UPDATE:
5592                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5593                     "qla_target(%d): Async event %#x occurred "
5594                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5595                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5596                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5597                 break;
5598
5599         case MBA_REJECTED_FCP_CMD:
5600                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
5601                         "qla_target(%d): Async event LS_REJECT occurred "
5602                         "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5603                         le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5604                         le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5605
5606                 if (le16_to_cpu(mailbox[3]) == 1) {
5607                         /* exchange starvation. */
5608                         vha->hw->exch_starvation++;
5609                         if (vha->hw->exch_starvation > 5) {
5610                                 ql_log(ql_log_warn, vha, 0xffff,
5611                                     "Exchange starvation-. Resetting RISC\n");
5612
5613                                 vha->hw->exch_starvation = 0;
5614                                 if (IS_P3P_TYPE(vha->hw))
5615                                         set_bit(FCOE_CTX_RESET_NEEDED,
5616                                             &vha->dpc_flags);
5617                                 else
5618                                         set_bit(ISP_ABORT_NEEDED,
5619                                             &vha->dpc_flags);
5620                                 qla2xxx_wake_dpc(vha);
5621                         }
5622                 }
5623                 break;
5624
5625         case MBA_PORT_UPDATE:
5626                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5627                     "qla_target(%d): Port update async event %#x "
5628                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5629                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5630                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5631                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5632
5633                 login_code = le16_to_cpu(mailbox[2]);
5634                 if (login_code == 0x4) {
5635                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5636                             "Async MB 2: Got PLOGI Complete\n");
5637                         vha->hw->exch_starvation = 0;
5638                 } else if (login_code == 0x7)
5639                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5640                             "Async MB 2: Port Logged Out\n");
5641                 break;
5642         default:
5643                 break;
5644         }
5645
5646         tgt->irq_cmd_count--;
5647 }
5648
5649 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5650         uint16_t loop_id)
5651 {
5652         fc_port_t *fcport, *tfcp, *del;
5653         int rc;
5654         unsigned long flags;
5655         u8 newfcport = 0;
5656
5657         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5658         if (!fcport) {
5659                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5660                     "qla_target(%d): Allocation of tmp FC port failed",
5661                     vha->vp_idx);
5662                 return NULL;
5663         }
5664
5665         fcport->loop_id = loop_id;
5666
5667         rc = qla24xx_gpdb_wait(vha, fcport, 0);
5668         if (rc != QLA_SUCCESS) {
5669                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5670                     "qla_target(%d): Failed to retrieve fcport "
5671                     "information -- get_port_database() returned %x "
5672                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5673                 kfree(fcport);
5674                 return NULL;
5675         }
5676
5677         del = NULL;
5678         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5679         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5680
5681         if (tfcp) {
5682                 tfcp->d_id = fcport->d_id;
5683                 tfcp->port_type = fcport->port_type;
5684                 tfcp->supported_classes = fcport->supported_classes;
5685                 tfcp->flags |= fcport->flags;
5686
5687                 del = fcport;
5688                 fcport = tfcp;
5689         } else {
5690                 if (vha->hw->current_topology == ISP_CFG_F)
5691                         fcport->flags |= FCF_FABRIC_DEVICE;
5692
5693                 list_add_tail(&fcport->list, &vha->vp_fcports);
5694                 if (!IS_SW_RESV_ADDR(fcport->d_id))
5695                    vha->fcport_count++;
5696                 fcport->login_gen++;
5697                 fcport->disc_state = DSC_LOGIN_COMPLETE;
5698                 fcport->login_succ = 1;
5699                 newfcport = 1;
5700         }
5701
5702         fcport->deleted = 0;
5703         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
5704
5705         switch (vha->host->active_mode) {
5706         case MODE_INITIATOR:
5707         case MODE_DUAL:
5708                 if (newfcport) {
5709                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
5710                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5711                                    "%s %d %8phC post upd_fcport fcp_cnt %d\n",
5712                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5713                                 qla24xx_post_upd_fcport_work(vha, fcport);
5714                         } else {
5715                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5716                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
5717                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
5718                                 qla24xx_post_gpsc_work(vha, fcport);
5719                         }
5720                 }
5721                 break;
5722
5723         case MODE_TARGET:
5724         default:
5725                 break;
5726         }
5727         if (del)
5728                 qla2x00_free_fcport(del);
5729
5730         return fcport;
5731 }
5732
5733 /* Must be called under tgt_mutex */
5734 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
5735         uint8_t *s_id)
5736 {
5737         struct fc_port *sess = NULL;
5738         fc_port_t *fcport = NULL;
5739         int rc, global_resets;
5740         uint16_t loop_id = 0;
5741
5742         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
5743                 /*
5744                  * This is Domain Controller, so it should be
5745                  * OK to drop SCSI commands from it.
5746                  */
5747                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5748                     "Unable to find initiator with S_ID %x:%x:%x",
5749                     s_id[0], s_id[1], s_id[2]);
5750                 return NULL;
5751         }
5752
5753         mutex_lock(&vha->vha_tgt.tgt_mutex);
5754
5755 retry:
5756         global_resets =
5757             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5758
5759         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5760         if (rc != 0) {
5761                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5762
5763                 ql_log(ql_log_info, vha, 0xf071,
5764                     "qla_target(%d): Unable to find "
5765                     "initiator with S_ID %x:%x:%x",
5766                     vha->vp_idx, s_id[0], s_id[1],
5767                     s_id[2]);
5768
5769                 if (rc == -ENOENT) {
5770                         qlt_port_logo_t logo;
5771                         sid_to_portid(s_id, &logo.id);
5772                         logo.cmd_count = 1;
5773                         qlt_send_first_logo(vha, &logo);
5774                 }
5775
5776                 return NULL;
5777         }
5778
5779         fcport = qlt_get_port_database(vha, loop_id);
5780         if (!fcport) {
5781                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5782                 return NULL;
5783         }
5784
5785         if (global_resets !=
5786             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5787                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5788                     "qla_target(%d): global reset during session discovery "
5789                     "(counter was %d, new %d), retrying", vha->vp_idx,
5790                     global_resets,
5791                     atomic_read(&vha->vha_tgt.
5792                         qla_tgt->tgt_global_resets_count));
5793                 goto retry;
5794         }
5795
5796         sess = qlt_create_sess(vha, fcport, true);
5797
5798         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5799
5800         return sess;
5801 }
5802
5803 static void qlt_abort_work(struct qla_tgt *tgt,
5804         struct qla_tgt_sess_work_param *prm)
5805 {
5806         struct scsi_qla_host *vha = tgt->vha;
5807         struct qla_hw_data *ha = vha->hw;
5808         struct fc_port *sess = NULL;
5809         unsigned long flags = 0, flags2 = 0;
5810         uint32_t be_s_id;
5811         uint8_t s_id[3];
5812         int rc;
5813
5814         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5815
5816         if (tgt->tgt_stop)
5817                 goto out_term2;
5818
5819         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5820         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5821         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5822
5823         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5824             (unsigned char *)&be_s_id);
5825         if (!sess) {
5826                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5827
5828                 sess = qlt_make_local_sess(vha, s_id);
5829                 /* sess has got an extra creation ref */
5830
5831                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5832                 if (!sess)
5833                         goto out_term2;
5834         } else {
5835                 if (sess->deleted) {
5836                         sess = NULL;
5837                         goto out_term2;
5838                 }
5839
5840                 if (!kref_get_unless_zero(&sess->sess_kref)) {
5841                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
5842                             "%s: kref_get fail %8phC \n",
5843                              __func__, sess->port_name);
5844                         sess = NULL;
5845                         goto out_term2;
5846                 }
5847         }
5848
5849         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5850         ha->tgt.tgt_ops->put_sess(sess);
5851         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5852
5853         if (rc != 0)
5854                 goto out_term;
5855         return;
5856
5857 out_term2:
5858         if (sess)
5859                 ha->tgt.tgt_ops->put_sess(sess);
5860         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5861
5862 out_term:
5863         spin_lock_irqsave(&ha->hardware_lock, flags);
5864         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5865         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5866 }
5867
5868 static void qlt_tmr_work(struct qla_tgt *tgt,
5869         struct qla_tgt_sess_work_param *prm)
5870 {
5871         struct atio_from_isp *a = &prm->tm_iocb2;
5872         struct scsi_qla_host *vha = tgt->vha;
5873         struct qla_hw_data *ha = vha->hw;
5874         struct fc_port *sess = NULL;
5875         unsigned long flags;
5876         uint8_t *s_id = NULL; /* to hide compiler warnings */
5877         int rc;
5878         uint32_t lun, unpacked_lun;
5879         int fn;
5880         void *iocb;
5881
5882         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5883
5884         if (tgt->tgt_stop)
5885                 goto out_term2;
5886
5887         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5888         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5889         if (!sess) {
5890                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5891
5892                 sess = qlt_make_local_sess(vha, s_id);
5893                 /* sess has got an extra creation ref */
5894
5895                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5896                 if (!sess)
5897                         goto out_term2;
5898         } else {
5899                 if (sess->deleted) {
5900                         sess = NULL;
5901                         goto out_term2;
5902                 }
5903
5904                 if (!kref_get_unless_zero(&sess->sess_kref)) {
5905                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xffff,
5906                             "%s: kref_get fail %8phC\n",
5907                              __func__, sess->port_name);
5908                         sess = NULL;
5909                         goto out_term2;
5910                 }
5911         }
5912
5913         iocb = a;
5914         lun = a->u.isp24.fcp_cmnd.lun;
5915         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5916         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5917
5918         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5919         ha->tgt.tgt_ops->put_sess(sess);
5920         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5921
5922         if (rc != 0)
5923                 goto out_term;
5924         return;
5925
5926 out_term2:
5927         if (sess)
5928                 ha->tgt.tgt_ops->put_sess(sess);
5929         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5930 out_term:
5931         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0);
5932 }
5933
5934 static void qlt_sess_work_fn(struct work_struct *work)
5935 {
5936         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5937         struct scsi_qla_host *vha = tgt->vha;
5938         unsigned long flags;
5939
5940         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5941
5942         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5943         while (!list_empty(&tgt->sess_works_list)) {
5944                 struct qla_tgt_sess_work_param *prm = list_entry(
5945                     tgt->sess_works_list.next, typeof(*prm),
5946                     sess_works_list_entry);
5947
5948                 /*
5949                  * This work can be scheduled on several CPUs at time, so we
5950                  * must delete the entry to eliminate double processing
5951                  */
5952                 list_del(&prm->sess_works_list_entry);
5953
5954                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5955
5956                 switch (prm->type) {
5957                 case QLA_TGT_SESS_WORK_ABORT:
5958                         qlt_abort_work(tgt, prm);
5959                         break;
5960                 case QLA_TGT_SESS_WORK_TM:
5961                         qlt_tmr_work(tgt, prm);
5962                         break;
5963                 default:
5964                         BUG_ON(1);
5965                         break;
5966                 }
5967
5968                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5969
5970                 kfree(prm);
5971         }
5972         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5973 }
5974
5975 /* Must be called under tgt_host_action_mutex */
5976 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5977 {
5978         struct qla_tgt *tgt;
5979
5980         if (!QLA_TGT_MODE_ENABLED())
5981                 return 0;
5982
5983         if (!IS_TGT_MODE_CAPABLE(ha)) {
5984                 ql_log(ql_log_warn, base_vha, 0xe070,
5985                     "This adapter does not support target mode.\n");
5986                 return 0;
5987         }
5988
5989         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5990             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5991
5992         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5993
5994         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5995         if (!tgt) {
5996                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5997                     "Unable to allocate struct qla_tgt\n");
5998                 return -ENOMEM;
5999         }
6000
6001         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6002                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6003
6004         tgt->ha = ha;
6005         tgt->vha = base_vha;
6006         init_waitqueue_head(&tgt->waitQ);
6007         INIT_LIST_HEAD(&tgt->del_sess_list);
6008         spin_lock_init(&tgt->sess_work_lock);
6009         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6010         INIT_LIST_HEAD(&tgt->sess_works_list);
6011         atomic_set(&tgt->tgt_global_resets_count, 0);
6012
6013         base_vha->vha_tgt.qla_tgt = tgt;
6014
6015         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6016                 "qla_target(%d): using 64 Bit PCI addressing",
6017                 base_vha->vp_idx);
6018         tgt->tgt_enable_64bit_addr = 1;
6019         /* 3 is reserved */
6020         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6021         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
6022         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
6023
6024         mutex_lock(&qla_tgt_mutex);
6025         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6026         mutex_unlock(&qla_tgt_mutex);
6027
6028         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6029                 ha->tgt.tgt_ops->add_target(base_vha);
6030
6031         return 0;
6032 }
6033
6034 /* Must be called under tgt_host_action_mutex */
6035 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6036 {
6037         if (!vha->vha_tgt.qla_tgt)
6038                 return 0;
6039
6040         if (vha->fc_vport) {
6041                 qlt_release(vha->vha_tgt.qla_tgt);
6042                 return 0;
6043         }
6044
6045         /* free left over qfull cmds */
6046         qlt_init_term_exchange(vha);
6047
6048         mutex_lock(&qla_tgt_mutex);
6049         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
6050         mutex_unlock(&qla_tgt_mutex);
6051
6052         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6053             vha->host_no, ha);
6054         qlt_release(vha->vha_tgt.qla_tgt);
6055
6056         return 0;
6057 }
6058
6059 void qlt_remove_target_resources(struct qla_hw_data *ha)
6060 {
6061         struct scsi_qla_host *node;
6062         u32 key = 0;
6063
6064         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6065                 btree_remove32(&ha->tgt.host_map, key);
6066
6067         btree_destroy32(&ha->tgt.host_map);
6068 }
6069
6070 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6071         unsigned char *b)
6072 {
6073         int i;
6074
6075         pr_debug("qla2xxx HW vha->node_name: ");
6076         for (i = 0; i < WWN_SIZE; i++)
6077                 pr_debug("%02x ", vha->node_name[i]);
6078         pr_debug("\n");
6079         pr_debug("qla2xxx HW vha->port_name: ");
6080         for (i = 0; i < WWN_SIZE; i++)
6081                 pr_debug("%02x ", vha->port_name[i]);
6082         pr_debug("\n");
6083
6084         pr_debug("qla2xxx passed configfs WWPN: ");
6085         put_unaligned_be64(wwpn, b);
6086         for (i = 0; i < WWN_SIZE; i++)
6087                 pr_debug("%02x ", b[i]);
6088         pr_debug("\n");
6089 }
6090
6091 /**
6092  * qla_tgt_lport_register - register lport with external module
6093  *
6094  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6095  * @wwpn: Passwd FC target WWPN
6096  * @callback:  lport initialization callback for tcm_qla2xxx code
6097  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6098  */
6099 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6100                        u64 npiv_wwpn, u64 npiv_wwnn,
6101                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6102 {
6103         struct qla_tgt *tgt;
6104         struct scsi_qla_host *vha;
6105         struct qla_hw_data *ha;
6106         struct Scsi_Host *host;
6107         unsigned long flags;
6108         int rc;
6109         u8 b[WWN_SIZE];
6110
6111         mutex_lock(&qla_tgt_mutex);
6112         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6113                 vha = tgt->vha;
6114                 ha = vha->hw;
6115
6116                 host = vha->host;
6117                 if (!host)
6118                         continue;
6119
6120                 if (!(host->hostt->supported_mode & MODE_TARGET))
6121                         continue;
6122
6123                 spin_lock_irqsave(&ha->hardware_lock, flags);
6124                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6125                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6126                             host->host_no);
6127                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6128                         continue;
6129                 }
6130                 if (tgt->tgt_stop) {
6131                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6132                                  host->host_no);
6133                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6134                         continue;
6135                 }
6136                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6137
6138                 if (!scsi_host_get(host)) {
6139                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6140                             "Unable to scsi_host_get() for"
6141                             " qla2xxx scsi_host\n");
6142                         continue;
6143                 }
6144                 qlt_lport_dump(vha, phys_wwpn, b);
6145
6146                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6147                         scsi_host_put(host);
6148                         continue;
6149                 }
6150                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6151                 if (rc != 0)
6152                         scsi_host_put(host);
6153
6154                 mutex_unlock(&qla_tgt_mutex);
6155                 return rc;
6156         }
6157         mutex_unlock(&qla_tgt_mutex);
6158
6159         return -ENODEV;
6160 }
6161 EXPORT_SYMBOL(qlt_lport_register);
6162
6163 /**
6164  * qla_tgt_lport_deregister - Degister lport
6165  *
6166  * @vha:  Registered scsi_qla_host pointer
6167  */
6168 void qlt_lport_deregister(struct scsi_qla_host *vha)
6169 {
6170         struct qla_hw_data *ha = vha->hw;
6171         struct Scsi_Host *sh = vha->host;
6172         /*
6173          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6174          */
6175         vha->vha_tgt.target_lport_ptr = NULL;
6176         ha->tgt.tgt_ops = NULL;
6177         /*
6178          * Release the Scsi_Host reference for the underlying qla2xxx host
6179          */
6180         scsi_host_put(sh);
6181 }
6182 EXPORT_SYMBOL(qlt_lport_deregister);
6183
6184 /* Must be called under HW lock */
6185 static void qlt_set_mode(struct scsi_qla_host *vha)
6186 {
6187         switch (ql2x_ini_mode) {
6188         case QLA2XXX_INI_MODE_DISABLED:
6189         case QLA2XXX_INI_MODE_EXCLUSIVE:
6190                 vha->host->active_mode = MODE_TARGET;
6191                 break;
6192         case QLA2XXX_INI_MODE_ENABLED:
6193                 vha->host->active_mode = MODE_UNKNOWN;
6194                 break;
6195         case QLA2XXX_INI_MODE_DUAL:
6196                 vha->host->active_mode = MODE_DUAL;
6197                 break;
6198         default:
6199                 break;
6200         }
6201 }
6202
6203 /* Must be called under HW lock */
6204 static void qlt_clear_mode(struct scsi_qla_host *vha)
6205 {
6206         switch (ql2x_ini_mode) {
6207         case QLA2XXX_INI_MODE_DISABLED:
6208                 vha->host->active_mode = MODE_UNKNOWN;
6209                 break;
6210         case QLA2XXX_INI_MODE_EXCLUSIVE:
6211                 vha->host->active_mode = MODE_INITIATOR;
6212                 break;
6213         case QLA2XXX_INI_MODE_ENABLED:
6214         case QLA2XXX_INI_MODE_DUAL:
6215                 vha->host->active_mode = MODE_INITIATOR;
6216                 break;
6217         default:
6218                 break;
6219         }
6220 }
6221
6222 /*
6223  * qla_tgt_enable_vha - NO LOCK HELD
6224  *
6225  * host_reset, bring up w/ Target Mode Enabled
6226  */
6227 void
6228 qlt_enable_vha(struct scsi_qla_host *vha)
6229 {
6230         struct qla_hw_data *ha = vha->hw;
6231         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6232         unsigned long flags;
6233         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6234         int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER;
6235
6236         if (!tgt) {
6237                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6238                     "Unable to locate qla_tgt pointer from"
6239                     " struct qla_hw_data\n");
6240                 dump_stack();
6241                 return;
6242         }
6243
6244         spin_lock_irqsave(&ha->hardware_lock, flags);
6245         tgt->tgt_stopped = 0;
6246         qlt_set_mode(vha);
6247         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6248
6249         if (vha->vp_idx) {
6250                 qla24xx_disable_vp(vha);
6251                 qla24xx_enable_vp(vha);
6252         } else {
6253                 if (ha->msix_entries) {
6254                         ql_dbg(ql_dbg_tgt, vha, 0xffff,
6255                             "%s: host%ld : vector %d cpu %d\n",
6256                             __func__, vha->host_no,
6257                             ha->msix_entries[rspq_ent].vector,
6258                             ha->msix_entries[rspq_ent].cpuid);
6259
6260                         ha->tgt.rspq_vector_cpuid =
6261                             ha->msix_entries[rspq_ent].cpuid;
6262                 }
6263
6264                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6265                 qla2xxx_wake_dpc(base_vha);
6266                 qla2x00_wait_for_hba_online(base_vha);
6267         }
6268 }
6269 EXPORT_SYMBOL(qlt_enable_vha);
6270
6271 /*
6272  * qla_tgt_disable_vha - NO LOCK HELD
6273  *
6274  * Disable Target Mode and reset the adapter
6275  */
6276 static void qlt_disable_vha(struct scsi_qla_host *vha)
6277 {
6278         struct qla_hw_data *ha = vha->hw;
6279         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6280         unsigned long flags;
6281
6282         if (!tgt) {
6283                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6284                     "Unable to locate qla_tgt pointer from"
6285                     " struct qla_hw_data\n");
6286                 dump_stack();
6287                 return;
6288         }
6289
6290         spin_lock_irqsave(&ha->hardware_lock, flags);
6291         qlt_clear_mode(vha);
6292         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6293
6294         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6295         qla2xxx_wake_dpc(vha);
6296         qla2x00_wait_for_hba_online(vha);
6297 }
6298
6299 /*
6300  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6301  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6302  * members.
6303  */
6304 void
6305 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6306 {
6307         vha->vha_tgt.qla_tgt = NULL;
6308
6309         mutex_init(&vha->vha_tgt.tgt_mutex);
6310         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6311
6312         qlt_clear_mode(vha);
6313
6314         /*
6315          * NOTE: Currently the value is kept the same for <24xx and
6316          * >=24xx ISPs. If it is necessary to change it,
6317          * the check should be added for specific ISPs,
6318          * assigning the value appropriately.
6319          */
6320         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6321
6322         qlt_add_target(ha, vha);
6323 }
6324
6325 void
6326 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6327 {
6328         /*
6329          * FC-4 Feature bit 0 indicates target functionality to the name server.
6330          */
6331         if (qla_tgt_mode_enabled(vha)) {
6332                 ct_req->req.rff_id.fc4_feature = BIT_0;
6333         } else if (qla_ini_mode_enabled(vha)) {
6334                 ct_req->req.rff_id.fc4_feature = BIT_1;
6335         } else if (qla_dual_mode_enabled(vha))
6336                 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6337 }
6338
6339 /*
6340  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6341  * @ha: HA context
6342  *
6343  * Beginning of ATIO ring has initialization control block already built
6344  * by nvram config routine.
6345  *
6346  * Returns 0 on success.
6347  */
6348 void
6349 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6350 {
6351         struct qla_hw_data *ha = vha->hw;
6352         uint16_t cnt;
6353         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6354
6355         if (qla_ini_mode_enabled(vha))
6356                 return;
6357
6358         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6359                 pkt->u.raw.signature = ATIO_PROCESSED;
6360                 pkt++;
6361         }
6362
6363 }
6364
6365 /*
6366  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6367  * @ha: SCSI driver HA context
6368  */
6369 void
6370 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6371 {
6372         struct qla_hw_data *ha = vha->hw;
6373         struct atio_from_isp *pkt;
6374         int cnt, i;
6375
6376         if (!ha->flags.fw_started)
6377                 return;
6378
6379         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6380             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6381                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6382                 cnt = pkt->u.raw.entry_count;
6383
6384                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6385                         /*
6386                          * This packet is corrupted. The header + payload
6387                          * can not be trusted. There is no point in passing
6388                          * it further up.
6389                          */
6390                         ql_log(ql_log_warn, vha, 0xffff,
6391                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6392                             pkt->u.isp24.fcp_hdr.s_id,
6393                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6394                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6395
6396                         adjust_corrupted_atio(pkt);
6397                         qlt_send_term_exchange(vha, NULL, pkt, ha_locked, 0);
6398                 } else {
6399                         qlt_24xx_atio_pkt_all_vps(vha,
6400                             (struct atio_from_isp *)pkt, ha_locked);
6401                 }
6402
6403                 for (i = 0; i < cnt; i++) {
6404                         ha->tgt.atio_ring_index++;
6405                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6406                                 ha->tgt.atio_ring_index = 0;
6407                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6408                         } else
6409                                 ha->tgt.atio_ring_ptr++;
6410
6411                         pkt->u.raw.signature = ATIO_PROCESSED;
6412                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6413                 }
6414                 wmb();
6415         }
6416
6417         /* Adjust ring index */
6418         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6419         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6420 }
6421
6422 void
6423 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6424 {
6425         struct qla_hw_data *ha = vha->hw;
6426         if (!QLA_TGT_MODE_ENABLED())
6427                 return;
6428
6429         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6430         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6431         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6432
6433         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6434                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6435                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6436
6437                 icb->msix_atio = cpu_to_le16(msix->entry);
6438                 ql_dbg(ql_dbg_init, vha, 0xf072,
6439                     "Registering ICB vector 0x%x for atio que.\n",
6440                     msix->entry);
6441         }
6442 }
6443
6444 void
6445 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6446 {
6447         struct qla_hw_data *ha = vha->hw;
6448         u32 tmp;
6449         u16 t;
6450
6451         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6452                 if (!ha->tgt.saved_set) {
6453                         /* We save only once */
6454                         ha->tgt.saved_exchange_count = nv->exchange_count;
6455                         ha->tgt.saved_firmware_options_1 =
6456                             nv->firmware_options_1;
6457                         ha->tgt.saved_firmware_options_2 =
6458                             nv->firmware_options_2;
6459                         ha->tgt.saved_firmware_options_3 =
6460                             nv->firmware_options_3;
6461                         ha->tgt.saved_set = 1;
6462                 }
6463
6464                 if (qla_tgt_mode_enabled(vha)) {
6465                         nv->exchange_count = cpu_to_le16(0xFFFF);
6466                 } else {                        /* dual */
6467                         if (ql_dm_tgt_ex_pct > 100) {
6468                                 ql_dm_tgt_ex_pct = 50;
6469                         } else if (ql_dm_tgt_ex_pct == 100) {
6470                                 /* leave some for FW */
6471                                 ql_dm_tgt_ex_pct = 95;
6472                         }
6473
6474                         tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct;
6475                         tmp = tmp/100;
6476                         if (tmp > 0xffff)
6477                                 tmp = 0xffff;
6478
6479                         t = tmp & 0xffff;
6480                         nv->exchange_count = cpu_to_le16(t);
6481                 }
6482
6483                 /* Enable target mode */
6484                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6485
6486                 /* Disable ini mode, if requested */
6487                 if (qla_tgt_mode_enabled(vha))
6488                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6489
6490                 /* Disable Full Login after LIP */
6491                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6492                 /* Enable initial LIP */
6493                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6494                 if (ql2xtgt_tape_enable)
6495                         /* Enable FC Tape support */
6496                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6497                 else
6498                         /* Disable FC Tape support */
6499                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6500
6501                 /* Disable Full Login after LIP */
6502                 nv->host_p &= cpu_to_le32(~BIT_10);
6503
6504                 /*
6505                  * clear BIT 15 explicitly as we have seen at least
6506                  * a couple of instances where this was set and this
6507                  * was causing the firmware to not be initialized.
6508                  */
6509                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6510                 /* Enable target PRLI control */
6511                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6512         } else {
6513                 if (ha->tgt.saved_set) {
6514                         nv->exchange_count = ha->tgt.saved_exchange_count;
6515                         nv->firmware_options_1 =
6516                             ha->tgt.saved_firmware_options_1;
6517                         nv->firmware_options_2 =
6518                             ha->tgt.saved_firmware_options_2;
6519                         nv->firmware_options_3 =
6520                             ha->tgt.saved_firmware_options_3;
6521                 }
6522                 return;
6523         }
6524
6525         if (ha->tgt.enable_class_2) {
6526                 if (vha->flags.init_done)
6527                         fc_host_supported_classes(vha->host) =
6528                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6529
6530                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6531         } else {
6532                 if (vha->flags.init_done)
6533                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6534
6535                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6536         }
6537 }
6538
6539 void
6540 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6541         struct init_cb_24xx *icb)
6542 {
6543         struct qla_hw_data *ha = vha->hw;
6544
6545         if (!QLA_TGT_MODE_ENABLED())
6546                 return;
6547
6548         if (ha->tgt.node_name_set) {
6549                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6550                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6551         }
6552
6553         /* disable ZIO at start time. */
6554         if (!vha->flags.init_done) {
6555                 uint32_t tmp;
6556                 tmp = le32_to_cpu(icb->firmware_options_2);
6557                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6558                 icb->firmware_options_2 = cpu_to_le32(tmp);
6559         }
6560 }
6561
6562 void
6563 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6564 {
6565         struct qla_hw_data *ha = vha->hw;
6566         u32 tmp;
6567         u16 t;
6568
6569         if (!QLA_TGT_MODE_ENABLED())
6570                 return;
6571
6572         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6573                 if (!ha->tgt.saved_set) {
6574                         /* We save only once */
6575                         ha->tgt.saved_exchange_count = nv->exchange_count;
6576                         ha->tgt.saved_firmware_options_1 =
6577                             nv->firmware_options_1;
6578                         ha->tgt.saved_firmware_options_2 =
6579                             nv->firmware_options_2;
6580                         ha->tgt.saved_firmware_options_3 =
6581                             nv->firmware_options_3;
6582                         ha->tgt.saved_set = 1;
6583                 }
6584
6585                 if (qla_tgt_mode_enabled(vha)) {
6586                         nv->exchange_count = cpu_to_le16(0xFFFF);
6587                 } else {                        /* dual */
6588                         if (ql_dm_tgt_ex_pct > 100) {
6589                                 ql_dm_tgt_ex_pct = 50;
6590                         } else if (ql_dm_tgt_ex_pct == 100) {
6591                                 /* leave some for FW */
6592                                 ql_dm_tgt_ex_pct = 95;
6593                         }
6594
6595                         tmp = ha->orig_fw_xcb_count * ql_dm_tgt_ex_pct;
6596                         tmp = tmp/100;
6597                         if (tmp > 0xffff)
6598                                 tmp = 0xffff;
6599                         t = tmp & 0xffff;
6600                         nv->exchange_count = cpu_to_le16(t);
6601                 }
6602
6603                 /* Enable target mode */
6604                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6605
6606                 /* Disable ini mode, if requested */
6607                 if (qla_tgt_mode_enabled(vha))
6608                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6609                 /* Disable Full Login after LIP */
6610                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6611                 /* Enable initial LIP */
6612                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6613                 /*
6614                  * clear BIT 15 explicitly as we have seen at
6615                  * least a couple of instances where this was set
6616                  * and this was causing the firmware to not be
6617                  * initialized.
6618                  */
6619                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6620                 if (ql2xtgt_tape_enable)
6621                         /* Enable FC tape support */
6622                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6623                 else
6624                         /* Disable FC tape support */
6625                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6626
6627                 /* Disable Full Login after LIP */
6628                 nv->host_p &= cpu_to_le32(~BIT_10);
6629                 /* Enable target PRLI control */
6630                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6631         } else {
6632                 if (ha->tgt.saved_set) {
6633                         nv->exchange_count = ha->tgt.saved_exchange_count;
6634                         nv->firmware_options_1 =
6635                             ha->tgt.saved_firmware_options_1;
6636                         nv->firmware_options_2 =
6637                             ha->tgt.saved_firmware_options_2;
6638                         nv->firmware_options_3 =
6639                             ha->tgt.saved_firmware_options_3;
6640                 }
6641                 return;
6642         }
6643
6644         if (ha->tgt.enable_class_2) {
6645                 if (vha->flags.init_done)
6646                         fc_host_supported_classes(vha->host) =
6647                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6648
6649                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6650         } else {
6651                 if (vha->flags.init_done)
6652                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6653
6654                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6655         }
6656 }
6657
6658 void
6659 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6660         struct init_cb_81xx *icb)
6661 {
6662         struct qla_hw_data *ha = vha->hw;
6663
6664         if (!QLA_TGT_MODE_ENABLED())
6665                 return;
6666
6667         if (ha->tgt.node_name_set) {
6668                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6669                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6670         }
6671
6672         /* disable ZIO at start time. */
6673         if (!vha->flags.init_done) {
6674                 uint32_t tmp;
6675                 tmp = le32_to_cpu(icb->firmware_options_2);
6676                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6677                 icb->firmware_options_2 = cpu_to_le32(tmp);
6678         }
6679
6680 }
6681
6682 void
6683 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6684 {
6685         if (!QLA_TGT_MODE_ENABLED())
6686                 return;
6687
6688         ha->msix_count += 1; /* For ATIO Q */
6689 }
6690
6691 int
6692 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6693         struct sts_entry_24xx *pkt)
6694 {
6695         switch (pkt->entry_type) {
6696         case ABTS_RECV_24XX:
6697         case ABTS_RESP_24XX:
6698         case CTIO_TYPE7:
6699         case NOTIFY_ACK_TYPE:
6700         case CTIO_CRC2:
6701                 return 1;
6702         default:
6703                 return 0;
6704         }
6705 }
6706
6707 void
6708 qlt_modify_vp_config(struct scsi_qla_host *vha,
6709         struct vp_config_entry_24xx *vpmod)
6710 {
6711         /* enable target mode.  Bit5 = 1 => disable */
6712         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
6713                 vpmod->options_idx1 &= ~BIT_5;
6714
6715         /* Disable ini mode, if requested.  bit4 = 1 => disable */
6716         if (qla_tgt_mode_enabled(vha))
6717                 vpmod->options_idx1 &= ~BIT_4;
6718 }
6719
6720 void
6721 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6722 {
6723         int rc;
6724
6725         if (!QLA_TGT_MODE_ENABLED())
6726                 return;
6727
6728         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6729                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6730                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6731         } else {
6732                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6733                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6734         }
6735
6736         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6737         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6738
6739         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
6740         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
6741             qlt_unknown_atio_work_fn);
6742
6743         qlt_clear_mode(base_vha);
6744
6745         rc = btree_init32(&ha->tgt.host_map);
6746         if (rc)
6747                 ql_log(ql_log_info, base_vha, 0xffff,
6748                     "Unable to initialize ha->host_map btree\n");
6749
6750         qlt_update_vp_map(base_vha, SET_VP_IDX);
6751 }
6752
6753 irqreturn_t
6754 qla83xx_msix_atio_q(int irq, void *dev_id)
6755 {
6756         struct rsp_que *rsp;
6757         scsi_qla_host_t *vha;
6758         struct qla_hw_data *ha;
6759         unsigned long flags;
6760
6761         rsp = (struct rsp_que *) dev_id;
6762         ha = rsp->hw;
6763         vha = pci_get_drvdata(ha->pdev);
6764
6765         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6766
6767         qlt_24xx_process_atio_queue(vha, 0);
6768
6769         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6770
6771         return IRQ_HANDLED;
6772 }
6773
6774 static void
6775 qlt_handle_abts_recv_work(struct work_struct *work)
6776 {
6777         struct qla_tgt_sess_op *op = container_of(work,
6778                 struct qla_tgt_sess_op, work);
6779         scsi_qla_host_t *vha = op->vha;
6780         struct qla_hw_data *ha = vha->hw;
6781         unsigned long flags;
6782
6783         if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset))
6784                 return;
6785
6786         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6787         qlt_24xx_process_atio_queue(vha, 0);
6788         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6789
6790         spin_lock_irqsave(&ha->hardware_lock, flags);
6791         qlt_response_pkt_all_vps(vha, (response_t *)&op->atio);
6792         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6793
6794         kfree(op);
6795 }
6796
6797 void
6798 qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt)
6799 {
6800         struct qla_tgt_sess_op *op;
6801
6802         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6803
6804         if (!op) {
6805                 /* do not reach for ATIO queue here.  This is best effort err
6806                  * recovery at this point.
6807                  */
6808                 qlt_response_pkt_all_vps(vha, pkt);
6809                 return;
6810         }
6811
6812         memcpy(&op->atio, pkt, sizeof(*pkt));
6813         op->vha = vha;
6814         op->chip_reset = vha->hw->chip_reset;
6815         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6816         queue_work(qla_tgt_wq, &op->work);
6817         return;
6818 }
6819
6820 int
6821 qlt_mem_alloc(struct qla_hw_data *ha)
6822 {
6823         if (!QLA_TGT_MODE_ENABLED())
6824                 return 0;
6825
6826         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6827             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6828         if (!ha->tgt.tgt_vp_map)
6829                 return -ENOMEM;
6830
6831         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6832             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6833             &ha->tgt.atio_dma, GFP_KERNEL);
6834         if (!ha->tgt.atio_ring) {
6835                 kfree(ha->tgt.tgt_vp_map);
6836                 return -ENOMEM;
6837         }
6838         return 0;
6839 }
6840
6841 void
6842 qlt_mem_free(struct qla_hw_data *ha)
6843 {
6844         if (!QLA_TGT_MODE_ENABLED())
6845                 return;
6846
6847         if (ha->tgt.atio_ring) {
6848                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6849                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6850                     ha->tgt.atio_dma);
6851         }
6852         kfree(ha->tgt.tgt_vp_map);
6853 }
6854
6855 /* vport_slock to be held by the caller */
6856 void
6857 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6858 {
6859         void *slot;
6860         u32 key;
6861         int rc;
6862
6863         if (!QLA_TGT_MODE_ENABLED())
6864                 return;
6865
6866         key = vha->d_id.b24;
6867
6868         switch (cmd) {
6869         case SET_VP_IDX:
6870                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6871                 break;
6872         case SET_AL_PA:
6873                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
6874                 if (!slot) {
6875                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
6876                             "Save vha in host_map %p %06x\n", vha, key);
6877                         rc = btree_insert32(&vha->hw->tgt.host_map,
6878                                 key, vha, GFP_ATOMIC);
6879                         if (rc)
6880                                 ql_log(ql_log_info, vha, 0xffff,
6881                                     "Unable to insert s_id into host_map: %06x\n",
6882                                     key);
6883                         return;
6884                 }
6885                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
6886                         "replace existing vha in host_map %p %06x\n", vha, key);
6887                 btree_update32(&vha->hw->tgt.host_map, key, vha);
6888                 break;
6889         case RESET_VP_IDX:
6890                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6891                 break;
6892         case RESET_AL_PA:
6893                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
6894                    "clear vha in host_map %p %06x\n", vha, key);
6895                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
6896                 if (slot)
6897                         btree_remove32(&vha->hw->tgt.host_map, key);
6898                 vha->d_id.b24 = 0;
6899                 break;
6900         }
6901 }
6902
6903 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
6904 {
6905         unsigned long flags;
6906         struct qla_hw_data *ha = vha->hw;
6907
6908         if (!vha->d_id.b24) {
6909                 spin_lock_irqsave(&ha->vport_slock, flags);
6910                 vha->d_id = id;
6911                 qlt_update_vp_map(vha, SET_AL_PA);
6912                 spin_unlock_irqrestore(&ha->vport_slock, flags);
6913         } else if (vha->d_id.b24 != id.b24) {
6914                 spin_lock_irqsave(&ha->vport_slock, flags);
6915                 qlt_update_vp_map(vha, RESET_AL_PA);
6916                 vha->d_id = id;
6917                 qlt_update_vp_map(vha, SET_AL_PA);
6918                 spin_unlock_irqrestore(&ha->vport_slock, flags);
6919         }
6920 }
6921
6922 static int __init qlt_parse_ini_mode(void)
6923 {
6924         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6925                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6926         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6927                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6928         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6929                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6930         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
6931                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
6932         else
6933                 return false;
6934
6935         return true;
6936 }
6937
6938 int __init qlt_init(void)
6939 {
6940         int ret;
6941
6942         if (!qlt_parse_ini_mode()) {
6943                 ql_log(ql_log_fatal, NULL, 0xe06b,
6944                     "qlt_parse_ini_mode() failed\n");
6945                 return -EINVAL;
6946         }
6947
6948         if (!QLA_TGT_MODE_ENABLED())
6949                 return 0;
6950
6951         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6952             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6953             qla_tgt_mgmt_cmd), 0, NULL);
6954         if (!qla_tgt_mgmt_cmd_cachep) {
6955                 ql_log(ql_log_fatal, NULL, 0xe06d,
6956                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6957                 return -ENOMEM;
6958         }
6959
6960         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
6961             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
6962             0, NULL);
6963
6964         if (!qla_tgt_plogi_cachep) {
6965                 ql_log(ql_log_fatal, NULL, 0xe06d,
6966                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
6967                 ret = -ENOMEM;
6968                 goto out_mgmt_cmd_cachep;
6969         }
6970
6971         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6972             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6973         if (!qla_tgt_mgmt_cmd_mempool) {
6974                 ql_log(ql_log_fatal, NULL, 0xe06e,
6975                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6976                 ret = -ENOMEM;
6977                 goto out_plogi_cachep;
6978         }
6979
6980         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6981         if (!qla_tgt_wq) {
6982                 ql_log(ql_log_fatal, NULL, 0xe06f,
6983                     "alloc_workqueue for qla_tgt_wq failed\n");
6984                 ret = -ENOMEM;
6985                 goto out_cmd_mempool;
6986         }
6987         /*
6988          * Return 1 to signal that initiator-mode is being disabled
6989          */
6990         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6991
6992 out_cmd_mempool:
6993         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6994 out_plogi_cachep:
6995         kmem_cache_destroy(qla_tgt_plogi_cachep);
6996 out_mgmt_cmd_cachep:
6997         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6998         return ret;
6999 }
7000
7001 void qlt_exit(void)
7002 {
7003         if (!QLA_TGT_MODE_ENABLED())
7004                 return;
7005
7006         destroy_workqueue(qla_tgt_wq);
7007         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7008         kmem_cache_destroy(qla_tgt_plogi_cachep);
7009         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7010 }