drivers/scsi/qla2xxx/qla_target.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   4  *
   5  *  based on qla2x00t.c code:
   6  *
   7  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   8  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   9  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
  10  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  11  *
  12  *  Forward port and refactoring to modern qla2xxx and target/configfs
  13  *
  14  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/blkdev.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/pci.h>
  23 #include <linux/delay.h>
  24 #include <linux/list.h>
  25 #include <linux/workqueue.h>
  26 #include <asm/unaligned.h>
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30
  31 #include "qla_def.h"
  32 #include "qla_target.h"
  33
  34 static int ql2xtgt_tape_enable;
  35 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  36 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  37                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  38
  39 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  40 module_param(qlini_mode, charp, S_IRUGO);
  41 MODULE_PARM_DESC(qlini_mode,
  42         "Determines when initiator mode will be enabled. Possible values: "
  43         "\"exclusive\" - initiator mode will be enabled on load, "
  44         "disabled on enabling target mode and then on disabling target mode "
  45         "enabled back; "
  46         "\"disabled\" - initiator mode will never be enabled; "
  47         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  48         "when ready "
  49         "\"enabled\" (default) - initiator mode will always stay enabled.");
  50
  51 int ql2xuctrlirq = 1;
  52 module_param(ql2xuctrlirq, int, 0644);
  53 MODULE_PARM_DESC(ql2xuctrlirq,
  54     "User to control IRQ placement via smp_affinity."
  55     "Valid with qlini_mode=disabled."
  56     "1(default): enable");
  57
  58 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  59
  60 static int qla_sam_status = SAM_STAT_BUSY;
  61 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  62
  63 /*
  64  * From scsi/fc/fc_fcp.h
  65  */
  66 enum fcp_resp_rsp_codes {
  67         FCP_TMF_CMPL = 0,
  68         FCP_DATA_LEN_INVALID = 1,
  69         FCP_CMND_FIELDS_INVALID = 2,
  70         FCP_DATA_PARAM_MISMATCH = 3,
  71         FCP_TMF_REJECTED = 4,
  72         FCP_TMF_FAILED = 5,
  73         FCP_TMF_INVALID_LUN = 9,
  74 };
  75
  76 /*
  77  * fc_pri_ta from scsi/fc/fc_fcp.h
  78  */
  79 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  80 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  81 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  82 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  83 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  84 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  85 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  86
  87 /*
  88  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  89  * must be called under HW lock and could unlock/lock it inside.
  90  * It isn't an issue, since in the current implementation on the time when
  91  * those functions are called:
  92  *
  93  *   - Either context is IRQ and only IRQ handler can modify HW data,
  94  *     including rings related fields,
  95  *
  96  *   - Or access to target mode variables from struct qla_tgt doesn't
  97  *     cross those functions boundaries, except tgt_stop, which
  98  *     additionally protected by irq_cmd_count.
  99  */
 100 /* Predefs for callbacks handed to qla2xxx LLD */
 101 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 102         struct atio_from_isp *pkt, uint8_t);
 103 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 104         response_t *pkt);
 105 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 106         int fn, void *iocb, int flags);
 107 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 108         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 109 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 110         struct atio_from_isp *atio, uint16_t status, int qfull);
 111 static void qlt_disable_vha(struct scsi_qla_host *vha);
 112 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 113 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 114         struct imm_ntfy_from_isp *ntfy,
 115         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 116         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 117 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 118         struct imm_ntfy_from_isp *imm, int ha_locked);
 119 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 120         fc_port_t *fcport, bool local);
 121 void qlt_unreg_sess(struct fc_port *sess);
 122 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 123         struct abts_recv_from_24xx *);
 124 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 125     uint16_t);
 126 static int qlt_check_reserve_free_req(struct qla_qpair *qpair, uint32_t);
 127 static inline uint32_t qlt_make_handle(struct qla_qpair *);
 128
 129 /*
 130  * Global Variables
 131  */
 132 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 133 struct kmem_cache *qla_tgt_plogi_cachep;
 134 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 135 static struct workqueue_struct *qla_tgt_wq;
 136 static DEFINE_MUTEX(qla_tgt_mutex);
 137 static LIST_HEAD(qla_tgt_glist);
 138
 139 static const char *prot_op_str(u32 prot_op)
 140 {
 141         switch (prot_op) {
 142         case TARGET_PROT_NORMAL:        return "NORMAL";
 143         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 144         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 145         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 146         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 147         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 148         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 149         default:                        return "UNKNOWN";
 150         }
 151 }
 152
 153 /* This API intentionally takes dest as a parameter, rather than returning
 154  * int value to avoid caller forgetting to issue wmb() after the store */
 155 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 156 {
 157         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 158         *dest = atomic_inc_return(&base_vha->generation_tick);
 159         /* memory barrier */
 160         wmb();
 161 }
 162
 163 /* Might release hw lock, then reaquire!! */
 164 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 165 {
 166         /* Send marker if required */
 167         if (unlikely(vha->marker_needed != 0)) {
 168                 int rc = qla2x00_issue_marker(vha, vha_locked);
 169
 170                 if (rc != QLA_SUCCESS) {
 171                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 172                             "qla_target(%d): issue_marker() failed\n",
 173                             vha->vp_idx);
 174                 }
 175                 return rc;
 176         }
 177         return QLA_SUCCESS;
 178 }
 179
 180 struct scsi_qla_host *qla_find_host_by_d_id(struct scsi_qla_host *vha,
 181                                             be_id_t d_id)
 182 {
 183         struct scsi_qla_host *host;
 184         uint32_t key;
 185
 186         if (vha->d_id.b.area == d_id.area &&
 187             vha->d_id.b.domain == d_id.domain &&
 188             vha->d_id.b.al_pa == d_id.al_pa)
 189                 return vha;
 190
 191         key = be_to_port_id(d_id).b24;
 192
 193         host = btree_lookup32(&vha->hw->host_map, key);
 194         if (!host)
 195                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 196                     "Unable to find host %06x\n", key);
 197
 198         return host;
 199 }
 200
 201 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 202 {
 203         unsigned long flags;
 204
 205         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 206
 207         vha->hw->tgt.num_pend_cmds++;
 208         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 209                 vha->qla_stats.stat_max_pend_cmds =
 210                         vha->hw->tgt.num_pend_cmds;
 211         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 212 }
 213 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 214 {
 215         unsigned long flags;
 216
 217         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 218         vha->hw->tgt.num_pend_cmds--;
 219         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 220 }
 221
 222
 223 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 224         struct atio_from_isp *atio, uint8_t ha_locked)
 225 {
 226         struct qla_tgt_sess_op *u;
 227         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 228         unsigned long flags;
 229
 230         if (tgt->tgt_stop) {
 231                 ql_dbg(ql_dbg_async, vha, 0x502c,
 232                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 233                     vha->vp_idx);
 234                 goto out_term;
 235         }
 236
 237         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 238         if (u == NULL)
 239                 goto out_term;
 240
 241         u->vha = vha;
 242         memcpy(&u->atio, atio, sizeof(*atio));
 243         INIT_LIST_HEAD(&u->cmd_list);
 244
 245         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 246         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 247         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 248
 249         schedule_delayed_work(&vha->unknown_atio_work, 1);
 250
 251 out:
 252         return;
 253
 254 out_term:
 255         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 256         goto out;
 257 }
 258
 259 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 260         uint8_t ha_locked)
 261 {
 262         struct qla_tgt_sess_op *u, *t;
 263         scsi_qla_host_t *host;
 264         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 265         unsigned long flags;
 266         uint8_t queued = 0;
 267
 268         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 269                 if (u->aborted) {
 270                         ql_dbg(ql_dbg_async, vha, 0x502e,
 271                             "Freeing unknown %s %p, because of Abort\n",
 272                             "ATIO_TYPE7", u);
 273                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 274                             &u->atio, ha_locked, 0);
 275                         goto abort;
 276                 }
 277
 278                 host = qla_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 279                 if (host != NULL) {
 280                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 281                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 282                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 283                 } else if (tgt->tgt_stop) {
 284                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 285                             "Freeing unknown %s %p, because tgt is being stopped\n",
 286                             "ATIO_TYPE7", u);
 287                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 288                             &u->atio, ha_locked, 0);
 289                 } else {
 290                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 291                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 292                         if (!queued) {
 293                                 queued = 1;
 294                                 schedule_delayed_work(&vha->unknown_atio_work,
 295                                     1);
 296                         }
 297                         continue;
 298                 }
 299
 300 abort:
 301                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 302                 list_del(&u->cmd_list);
 303                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 304                 kfree(u);
 305         }
 306 }
 307
 308 void qlt_unknown_atio_work_fn(struct work_struct *work)
 309 {
 310         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 311             struct scsi_qla_host, unknown_atio_work);
 312
 313         qlt_try_to_dequeue_unknown_atios(vha, 0);
 314 }
 315
 316 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 317         struct atio_from_isp *atio, uint8_t ha_locked)
 318 {
 319         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 320                 "%s: qla_target(%d): type %x ox_id %04x\n",
 321                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 322                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 323
 324         switch (atio->u.raw.entry_type) {
 325         case ATIO_TYPE7:
 326         {
 327                 struct scsi_qla_host *host = qla_find_host_by_d_id(vha,
 328                     atio->u.isp24.fcp_hdr.d_id);
 329                 if (unlikely(NULL == host)) {
 330                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 331                             "qla_target(%d): Received ATIO_TYPE7 "
 332                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 333                             atio->u.isp24.fcp_hdr.d_id.domain,
 334                             atio->u.isp24.fcp_hdr.d_id.area,
 335                             atio->u.isp24.fcp_hdr.d_id.al_pa);
 336
 337
 338                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 339                         break;
 340                 }
 341                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 342                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 343
 344                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 345                 break;
 346         }
 347
 348         case IMMED_NOTIFY_TYPE:
 349         {
 350                 struct scsi_qla_host *host = vha;
 351                 struct imm_ntfy_from_isp *entry =
 352                     (struct imm_ntfy_from_isp *)atio;
 353
 354                 qlt_issue_marker(vha, ha_locked);
 355
 356                 if ((entry->u.isp24.vp_index != 0xFF) &&
 357                     (entry->u.isp24.nport_handle != cpu_to_le16(0xFFFF))) {
 358                         host = qla_find_host_by_vp_idx(vha,
 359                             entry->u.isp24.vp_index);
 360                         if (unlikely(!host)) {
 361                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 362                                     "qla_target(%d): Received "
 363                                     "ATIO (IMMED_NOTIFY_TYPE) "
 364                                     "with unknown vp_index %d\n",
 365                                     vha->vp_idx, entry->u.isp24.vp_index);
 366                                 break;
 367                         }
 368                 }
 369                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 370                 break;
 371         }
 372
 373         case VP_RPT_ID_IOCB_TYPE:
 374                 qla24xx_report_id_acquisition(vha,
 375                         (struct vp_rpt_id_entry_24xx *)atio);
 376                 break;
 377
 378         case ABTS_RECV_24XX:
 379         {
 380                 struct abts_recv_from_24xx *entry =
 381                         (struct abts_recv_from_24xx *)atio;
 382                 struct scsi_qla_host *host = qla_find_host_by_vp_idx(vha,
 383                         entry->vp_index);
 384                 unsigned long flags;
 385
 386                 if (unlikely(!host)) {
 387                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 388                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 389                             "received, with unknown vp_index %d\n",
 390                             vha->vp_idx, entry->vp_index);
 391                         break;
 392                 }
 393                 if (!ha_locked)
 394                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 395                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 396                 if (!ha_locked)
 397                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 398                 break;
 399         }
 400
 401         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 402
 403         default:
 404                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 405                     "qla_target(%d): Received unknown ATIO atio "
 406                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 407                 break;
 408         }
 409
 410         return false;
 411 }
 412
 413 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 414         struct rsp_que *rsp, response_t *pkt)
 415 {
 416         switch (pkt->entry_type) {
 417         case CTIO_CRC2:
 418                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 419                         "qla_target(%d):%s: CRC2 Response pkt\n",
 420                         vha->vp_idx, __func__);
 421                 fallthrough;
 422         case CTIO_TYPE7:
 423         {
 424                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 425                 struct scsi_qla_host *host = qla_find_host_by_vp_idx(vha,
 426                     entry->vp_index);
 427                 if (unlikely(!host)) {
 428                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 429                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 430                             "received, with unknown vp_index %d\n",
 431                             vha->vp_idx, entry->vp_index);
 432                         break;
 433                 }
 434                 qlt_response_pkt(host, rsp, pkt);
 435                 break;
 436         }
 437
 438         case IMMED_NOTIFY_TYPE:
 439         {
 440                 struct scsi_qla_host *host;
 441                 struct imm_ntfy_from_isp *entry =
 442                     (struct imm_ntfy_from_isp *)pkt;
 443
 444                 host = qla_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 445                 if (unlikely(!host)) {
 446                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 447                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 448                             "received, with unknown vp_index %d\n",
 449                             vha->vp_idx, entry->u.isp24.vp_index);
 450                         break;
 451                 }
 452                 qlt_response_pkt(host, rsp, pkt);
 453                 break;
 454         }
 455
 456         case NOTIFY_ACK_TYPE:
 457         {
 458                 struct scsi_qla_host *host = vha;
 459                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 460
 461                 if (0xFF != entry->u.isp24.vp_index) {
 462                         host = qla_find_host_by_vp_idx(vha,
 463                             entry->u.isp24.vp_index);
 464                         if (unlikely(!host)) {
 465                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 466                                     "qla_target(%d): Response "
 467                                     "pkt (NOTIFY_ACK_TYPE) "
 468                                     "received, with unknown "
 469                                     "vp_index %d\n", vha->vp_idx,
 470                                     entry->u.isp24.vp_index);
 471                                 break;
 472                         }
 473                 }
 474                 qlt_response_pkt(host, rsp, pkt);
 475                 break;
 476         }
 477
 478         case ABTS_RECV_24XX:
 479         {
 480                 struct abts_recv_from_24xx *entry =
 481                     (struct abts_recv_from_24xx *)pkt;
 482                 struct scsi_qla_host *host = qla_find_host_by_vp_idx(vha,
 483                     entry->vp_index);
 484                 if (unlikely(!host)) {
 485                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 486                             "qla_target(%d): Response pkt "
 487                             "(ABTS_RECV_24XX) received, with unknown "
 488                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 489                         break;
 490                 }
 491                 qlt_response_pkt(host, rsp, pkt);
 492                 break;
 493         }
 494
 495         case ABTS_RESP_24XX:
 496         {
 497                 struct abts_resp_to_24xx *entry =
 498                     (struct abts_resp_to_24xx *)pkt;
 499                 struct scsi_qla_host *host = qla_find_host_by_vp_idx(vha,
 500                     entry->vp_index);
 501                 if (unlikely(!host)) {
 502                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 503                             "qla_target(%d): Response pkt "
 504                             "(ABTS_RECV_24XX) received, with unknown "
 505                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 506                         break;
 507                 }
 508                 qlt_response_pkt(host, rsp, pkt);
 509                 break;
 510         }
 511         default:
 512                 qlt_response_pkt(vha, rsp, pkt);
 513                 break;
 514         }
 515
 516 }
 517
 518 /*
 519  * All qlt_plogi_ack_t operations are protected by hardware_lock
 520  */
 521 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 522         struct imm_ntfy_from_isp *ntfy, int type)
 523 {
 524         struct qla_work_evt *e;
 525
 526         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 527         if (!e)
 528                 return QLA_FUNCTION_FAILED;
 529
 530         e->u.nack.fcport = fcport;
 531         e->u.nack.type = type;
 532         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 533         return qla2x00_post_work(vha, e);
 534 }
 535
 536 static void qla2x00_async_nack_sp_done(srb_t *sp, int res)
 537 {
 538         struct scsi_qla_host *vha = sp->vha;
 539         unsigned long flags;
 540
 541         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 542             "Async done-%s res %x %8phC  type %d\n",
 543             sp->name, res, sp->fcport->port_name, sp->type);
 544
 545         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 546         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 547         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 548
 549         switch (sp->type) {
 550         case SRB_NACK_PLOGI:
 551                 sp->fcport->login_gen++;
 552                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 553                 sp->fcport->logout_on_delete = 1;
 554                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 555                 sp->fcport->send_els_logo = 0;
 556
 557                 if (sp->fcport->flags & FCF_FCSP_DEVICE) {
 558                         ql_dbg(ql_dbg_edif, vha, 0x20ef,
 559                             "%s %8phC edif: PLOGI- AUTH WAIT\n", __func__,
 560                             sp->fcport->port_name);
 561                         qla2x00_set_fcport_disc_state(sp->fcport,
 562                             DSC_LOGIN_AUTH_PEND);
 563                         qla2x00_post_aen_work(vha, FCH_EVT_PORT_ONLINE,
 564                             sp->fcport->d_id.b24);
 565                         qla_edb_eventcreate(vha, VND_CMD_AUTH_STATE_NEEDED, sp->fcport->d_id.b24,
 566                             0, sp->fcport);
 567                 }
 568                 break;
 569
 570         case SRB_NACK_PRLI:
 571                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 572                 sp->fcport->deleted = 0;
 573                 sp->fcport->send_els_logo = 0;
 574
 575                 if (!sp->fcport->login_succ &&
 576                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 577                         sp->fcport->login_succ = 1;
 578
 579                         vha->fcport_count++;
 580                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 581                         qla24xx_sched_upd_fcport(sp->fcport);
 582                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 583                 } else {
 584                         sp->fcport->login_retry = 0;
 585                         qla2x00_set_fcport_disc_state(sp->fcport,
 586                             DSC_LOGIN_COMPLETE);
 587                         sp->fcport->deleted = 0;
 588                         sp->fcport->logout_on_delete = 1;
 589                 }
 590                 break;
 591
 592         case SRB_NACK_LOGO:
 593                 sp->fcport->login_gen++;
 594                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 595                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 596                 break;
 597         }
 598         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 599
 600         kref_put(&sp->cmd_kref, qla2x00_sp_release);
 601 }
 602
 603 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 604         struct imm_ntfy_from_isp *ntfy, int type)
 605 {
 606         int rval = QLA_FUNCTION_FAILED;
 607         srb_t *sp;
 608         char *c = NULL;
 609
 610         fcport->flags |= FCF_ASYNC_SENT;
 611         switch (type) {
 612         case SRB_NACK_PLOGI:
 613                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 614                 c = "PLOGI";
 615                 if (vha->hw->flags.edif_enabled &&
 616                     (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP))
 617                         fcport->flags |= FCF_FCSP_DEVICE;
 618                 break;
 619         case SRB_NACK_PRLI:
 620                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 621                 fcport->deleted = 0;
 622                 c = "PRLI";
 623                 break;
 624         case SRB_NACK_LOGO:
 625                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 626                 c = "LOGO";
 627                 break;
 628         }
 629
 630         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 631         if (!sp)
 632                 goto done;
 633
 634         sp->type = type;
 635         sp->name = "nack";
 636         qla2x00_init_async_sp(sp, qla2x00_get_async_timeout(vha) + 2,
 637                               qla2x00_async_nack_sp_done);
 638
 639         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 640
 641         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 642             "Async-%s %8phC hndl %x %s\n",
 643             sp->name, fcport->port_name, sp->handle, c);
 644
 645         rval = qla2x00_start_sp(sp);
 646         if (rval != QLA_SUCCESS)
 647                 goto done_free_sp;
 648
 649         return rval;
 650
 651 done_free_sp:
 652         kref_put(&sp->cmd_kref, qla2x00_sp_release);
 653 done:
 654         fcport->flags &= ~FCF_ASYNC_SENT;
 655         return rval;
 656 }
 657
 658 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 659 {
 660         fc_port_t *t;
 661
 662         switch (e->u.nack.type) {
 663         case SRB_NACK_PRLI:
 664                 t = e->u.nack.fcport;
 665                 flush_work(&t->del_work);
 666                 flush_work(&t->free_work);
 667                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 668                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 669                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 670                 if (t) {
 671                         ql_log(ql_log_info, vha, 0xd034,
 672                             "%s create sess success %p", __func__, t);
 673                         /* create sess has an extra kref */
 674                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 675                 }
 676                 break;
 677         }
 678         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 679             (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
 680 }
 681
 682 void qla24xx_delete_sess_fn(struct work_struct *work)
 683 {
 684         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 685         struct qla_hw_data *ha = NULL;
 686
 687         if (!fcport || !fcport->vha || !fcport->vha->hw)
 688                 return;
 689
 690         ha = fcport->vha->hw;
 691
 692         if (fcport->se_sess) {
 693                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 694                 ha->tgt.tgt_ops->put_sess(fcport);
 695         } else {
 696                 qlt_unreg_sess(fcport);
 697         }
 698 }
 699
 700 /*
 701  * Called from qla2x00_reg_remote_port()
 702  */
 703 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 704 {
 705         struct qla_hw_data *ha = vha->hw;
 706         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 707         struct fc_port *sess = fcport;
 708         unsigned long flags;
 709
 710         if (!vha->hw->tgt.tgt_ops)
 711                 return;
 712
 713         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 714         if (tgt->tgt_stop) {
 715                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 716                 return;
 717         }
 718
 719         if (fcport->disc_state == DSC_DELETE_PEND) {
 720                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 721                 return;
 722         }
 723
 724         if (!sess->se_sess) {
 725                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 726
 727                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 728                 sess = qlt_create_sess(vha, fcport, false);
 729                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 730
 731                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 732         } else {
 733                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 734                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 735                         return;
 736                 }
 737
 738                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 739                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 740                             "%s: kref_get fail sess %8phC \n",
 741                             __func__, sess->port_name);
 742                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 743                         return;
 744                 }
 745
 746                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 747                     "qla_target(%u): %ssession for port %8phC "
 748                     "(loop ID %d) reappeared\n", vha->vp_idx,
 749                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 750
 751                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 752                     "Reappeared sess %p\n", sess);
 753
 754                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 755                     fcport->loop_id,
 756                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 757         }
 758
 759         if (sess && sess->local) {
 760                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 761                     "qla_target(%u): local session for "
 762                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 763                     fcport->port_name, sess->loop_id);
 764                 sess->local = 0;
 765         }
 766         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 767
 768         ha->tgt.tgt_ops->put_sess(sess);
 769 }
 770
 771 /*
 772  * This is a zero-base ref-counting solution, since hardware_lock
 773  * guarantees that ref_count is not modified concurrently.
 774  * Upon successful return content of iocb is undefined
 775  */
 776 static struct qlt_plogi_ack_t *
 777 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 778                        struct imm_ntfy_from_isp *iocb)
 779 {
 780         struct qlt_plogi_ack_t *pla;
 781
 782         lockdep_assert_held(&vha->hw->hardware_lock);
 783
 784         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 785                 if (pla->id.b24 == id->b24) {
 786                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 787                             "%s %d %8phC Term INOT due to new INOT",
 788                             __func__, __LINE__,
 789                             pla->iocb.u.isp24.port_name);
 790                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 791                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 792                         return pla;
 793                 }
 794         }
 795
 796         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 797         if (!pla) {
 798                 ql_dbg(ql_dbg_async, vha, 0x5088,
 799                        "qla_target(%d): Allocation of plogi_ack failed\n",
 800                        vha->vp_idx);
 801                 return NULL;
 802         }
 803
 804         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 805         pla->id = *id;
 806         list_add_tail(&pla->list, &vha->plogi_ack_list);
 807
 808         return pla;
 809 }
 810
 811 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 812     struct qlt_plogi_ack_t *pla)
 813 {
 814         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 815         port_id_t port_id;
 816         uint16_t loop_id;
 817         fc_port_t *fcport = pla->fcport;
 818
 819         BUG_ON(!pla->ref_count);
 820         pla->ref_count--;
 821
 822         if (pla->ref_count)
 823                 return;
 824
 825         ql_dbg(ql_dbg_disc, vha, 0x5089,
 826             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 827             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 828             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 829             iocb->u.isp24.port_id[0],
 830             le16_to_cpu(iocb->u.isp24.nport_handle),
 831             iocb->u.isp24.exchange_address, iocb->ox_id);
 832
 833         port_id.b.domain = iocb->u.isp24.port_id[2];
 834         port_id.b.area   = iocb->u.isp24.port_id[1];
 835         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 836         port_id.b.rsvd_1 = 0;
 837
 838         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 839
 840         fcport->loop_id = loop_id;
 841         fcport->d_id = port_id;
 842         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 843                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 844         else
 845                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 846
 847         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 848                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 849                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 850                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 851                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 852         }
 853
 854         list_del(&pla->list);
 855         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 856 }
 857
 858 void
 859 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 860     struct fc_port *sess, enum qlt_plogi_link_t link)
 861 {
 862         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 863         /* Inc ref_count first because link might already be pointing at pla */
 864         pla->ref_count++;
 865
 866         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 867                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 868                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 869                 sess, link, sess->port_name,
 870                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 871                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 872                 pla->ref_count, pla, link);
 873
 874         if (link == QLT_PLOGI_LINK_CONFLICT) {
 875                 switch (sess->disc_state) {
 876                 case DSC_DELETED:
 877                 case DSC_DELETE_PEND:
 878                         pla->ref_count--;
 879                         return;
 880                 default:
 881                         break;
 882                 }
 883         }
 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         if (test_bit(PFLG_DRIVER_REMOVING, &vha->pci_flags)) {
 915                 res = 0;
 916                 goto out;
 917         }
 918
 919         mutex_lock(&vha->vha_tgt.tgt_mutex);
 920
 921         list_for_each_entry(tmp, &vha->logo_list, list) {
 922                 if (tmp->id.b24 == logo->id.b24) {
 923                         tmp->cmd_count += logo->cmd_count;
 924                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 925                         return;
 926                 }
 927         }
 928
 929         list_add_tail(&logo->list, &vha->logo_list);
 930
 931         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 932
 933         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 934
 935         mutex_lock(&vha->vha_tgt.tgt_mutex);
 936         list_del(&logo->list);
 937         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 938
 939 out:
 940         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 941             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 942             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 943             logo->cmd_count, res);
 944 }
 945
 946 void qlt_free_session_done(struct work_struct *work)
 947 {
 948         struct fc_port *sess = container_of(work, struct fc_port,
 949             free_work);
 950         struct qla_tgt *tgt = sess->tgt;
 951         struct scsi_qla_host *vha = sess->vha;
 952         struct qla_hw_data *ha = vha->hw;
 953         unsigned long flags;
 954         bool logout_started = false;
 955         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 956         struct qlt_plogi_ack_t *own =
 957                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 958
 959         ql_dbg(ql_dbg_disc, vha, 0xf084,
 960                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 961                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 962                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 963                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 964                 sess->logout_on_delete, sess->keep_nport_handle,
 965                 sess->send_els_logo);
 966
 967         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 968                 qla2x00_mark_device_lost(vha, sess, 0);
 969
 970                 if (sess->send_els_logo) {
 971                         qlt_port_logo_t logo;
 972
 973                         logo.id = sess->d_id;
 974                         logo.cmd_count = 0;
 975                         INIT_LIST_HEAD(&logo.list);
 976                         if (!own)
 977                                 qlt_send_first_logo(vha, &logo);
 978                         sess->send_els_logo = 0;
 979                 }
 980
 981                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 982                         int rc;
 983
 984                         if (!own ||
 985                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
 986                                 sess->logout_completed = 0;
 987                                 rc = qla2x00_post_async_logout_work(vha, sess,
 988                                     NULL);
 989                                 if (rc != QLA_SUCCESS)
 990                                         ql_log(ql_log_warn, vha, 0xf085,
 991                                             "Schedule logo failed sess %p rc %d\n",
 992                                             sess, rc);
 993                                 else
 994                                         logout_started = true;
 995                         } else if (own && (own->iocb.u.isp24.status_subcode ==
 996                                 ELS_PRLI) && ha->flags.rida_fmt2) {
 997                                 rc = qla2x00_post_async_prlo_work(vha, sess,
 998                                     NULL);
 999                                 if (rc != QLA_SUCCESS)
1000                                         ql_log(ql_log_warn, vha, 0xf085,
1001                                             "Schedule PRLO failed sess %p rc %d\n",
1002                                             sess, rc);
1003                                 else
1004                                         logout_started = true;
1005                         }
1006                 } /* if sess->logout_on_delete */
1007
1008                 if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1009                     !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1010                         sess->nvme_flag |= NVME_FLAG_DELETING;
1011                         qla_nvme_unregister_remote_port(sess);
1012                 }
1013
1014                 if (ha->flags.edif_enabled &&
1015                                 (!own || own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
1016                         sess->edif.authok = 0;
1017                         if (!ha->flags.host_shutting_down) {
1018                                 ql_dbg(ql_dbg_edif, vha, 0x911e,
1019                                        "%s wwpn %8phC calling qla2x00_release_all_sadb\n",
1020                                        __func__, sess->port_name);
1021                                 qla2x00_release_all_sadb(vha, sess);
1022                         } else {
1023                                 ql_dbg(ql_dbg_edif, vha, 0x911e,
1024                                        "%s bypassing release_all_sadb\n",
1025                                        __func__);
1026                         }
1027
1028                         qla_edif_clear_appdata(vha, sess);
1029                         qla_edif_sess_down(vha, sess);
1030                 }
1031         }
1032
1033         /*
1034          * Release the target session for FC Nexus from fabric module code.
1035          */
1036         if (sess->se_sess != NULL)
1037                 ha->tgt.tgt_ops->free_session(sess);
1038
1039         if (logout_started) {
1040                 bool traced = false;
1041                 u16 cnt = 0;
1042
1043                 while (!READ_ONCE(sess->logout_completed)) {
1044                         if (!traced) {
1045                                 ql_dbg(ql_dbg_disc, vha, 0xf086,
1046                                         "%s: waiting for sess %p logout\n",
1047                                         __func__, sess);
1048                                 traced = true;
1049                         }
1050                         msleep(100);
1051                         cnt++;
1052                         /*
1053                          * Driver timeout is set to 22 Sec, update count value to loop
1054                          * long enough for log-out to complete before advancing. Otherwise,
1055                          * straddling logout can interfere with re-login attempt.
1056                          */
1057                         if (cnt > 230)
1058                                 break;
1059                 }
1060
1061                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1062                     "%s: sess %p logout completed\n", __func__, sess);
1063         }
1064
1065         if (sess->logo_ack_needed) {
1066                 sess->logo_ack_needed = 0;
1067                 qla24xx_async_notify_ack(vha, sess,
1068                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1069         }
1070
1071         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1072         if (sess->se_sess) {
1073                 sess->se_sess = NULL;
1074                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1075                         tgt->sess_count--;
1076         }
1077
1078         qla2x00_set_fcport_disc_state(sess, DSC_DELETED);
1079         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1080
1081         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1082                 vha->fcport_count--;
1083                 sess->login_succ = 0;
1084         }
1085
1086         qla2x00_clear_loop_id(sess);
1087
1088         if (sess->conflict) {
1089                 sess->conflict->login_pause = 0;
1090                 sess->conflict = NULL;
1091                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1092                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1093         }
1094
1095         {
1096                 struct qlt_plogi_ack_t *con =
1097                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1098                 struct imm_ntfy_from_isp *iocb;
1099
1100                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1101
1102                 if (con) {
1103                         iocb = &con->iocb;
1104                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1105                                  "se_sess %p / sess %p port %8phC is gone,"
1106                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1107                                  sess->se_sess, sess, sess->port_name,
1108                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1109                                  own ? own->ref_count : -1,
1110                                  iocb->u.isp24.port_name, con->ref_count);
1111                         qlt_plogi_ack_unref(vha, con);
1112                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1113                 } else {
1114                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1115                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1116                             sess->se_sess, sess, sess->port_name,
1117                             own ? "releasing own PLOGI" :
1118                             "no own PLOGI pending",
1119                             own ? own->ref_count : -1);
1120                 }
1121
1122                 if (own) {
1123                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1124                         qlt_plogi_ack_unref(vha, own);
1125                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1126                 }
1127         }
1128
1129         sess->explicit_logout = 0;
1130         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1131
1132         qla2x00_dfs_remove_rport(vha, sess);
1133
1134         spin_lock_irqsave(&vha->work_lock, flags);
1135         sess->flags &= ~FCF_ASYNC_SENT;
1136         sess->deleted = QLA_SESS_DELETED;
1137         sess->free_pending = 0;
1138         spin_unlock_irqrestore(&vha->work_lock, flags);
1139
1140         ql_dbg(ql_dbg_disc, vha, 0xf001,
1141             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1142                 sess, sess->port_name, vha->fcport_count);
1143
1144         if (tgt && (tgt->sess_count == 0))
1145                 wake_up_all(&tgt->waitQ);
1146
1147         if (!test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags) &&
1148             !(vha->vp_idx && test_bit(VPORT_DELETE, &vha->dpc_flags)) &&
1149             (!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1150                 switch (vha->host->active_mode) {
1151                 case MODE_INITIATOR:
1152                 case MODE_DUAL:
1153                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1154                         qla2xxx_wake_dpc(vha);
1155                         break;
1156                 case MODE_TARGET:
1157                 default:
1158                         /* no-op */
1159                         break;
1160                 }
1161         }
1162
1163         if (vha->fcport_count == 0)
1164                 wake_up_all(&vha->fcport_waitQ);
1165 }
1166
1167 /* ha->tgt.sess_lock supposed to be held on entry */
1168 void qlt_unreg_sess(struct fc_port *sess)
1169 {
1170         struct scsi_qla_host *vha = sess->vha;
1171         unsigned long flags;
1172
1173         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1174             "%s sess %p for deletion %8phC\n",
1175             __func__, sess, sess->port_name);
1176
1177         spin_lock_irqsave(&sess->vha->work_lock, flags);
1178         if (sess->free_pending) {
1179                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1180                 return;
1181         }
1182         sess->free_pending = 1;
1183         /*
1184          * Use FCF_ASYNC_SENT flag to block other cmds used in sess
1185          * management from being sent.
1186          */
1187         sess->flags |= FCF_ASYNC_SENT;
1188         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1189         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1190
1191         if (sess->se_sess)
1192                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1193
1194         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1195         sess->last_rscn_gen = sess->rscn_gen;
1196         sess->last_login_gen = sess->login_gen;
1197
1198         queue_work(sess->vha->hw->wq, &sess->free_work);
1199 }
1200 EXPORT_SYMBOL(qlt_unreg_sess);
1201
1202 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1203 {
1204         struct qla_hw_data *ha = vha->hw;
1205         struct fc_port *sess = NULL;
1206         uint16_t loop_id;
1207         int res = 0;
1208         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1209         unsigned long flags;
1210
1211         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1212         if (loop_id == 0xFFFF) {
1213                 /* Global event */
1214                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1215                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1216                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1217                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1218         } else {
1219                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1220                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1221                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1222         }
1223
1224         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1225             "Using sess for qla_tgt_reset: %p\n", sess);
1226         if (!sess) {
1227                 res = -ESRCH;
1228                 return res;
1229         }
1230
1231         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1232             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1233             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1234             mcmd, loop_id);
1235
1236         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1237 }
1238
1239 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1240 {
1241         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1242                 sess->logout_on_delete = 0;
1243                 sess->logo_ack_needed = 0;
1244                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1245         }
1246 }
1247
1248 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1249 {
1250         struct qla_tgt *tgt = sess->tgt;
1251         unsigned long flags;
1252         u16 sec;
1253
1254         switch (sess->disc_state) {
1255         case DSC_DELETE_PEND:
1256                 return;
1257         case DSC_DELETED:
1258                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1259                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]) {
1260                         if (tgt && tgt->tgt_stop && tgt->sess_count == 0)
1261                                 wake_up_all(&tgt->waitQ);
1262
1263                         if (sess->vha->fcport_count == 0)
1264                                 wake_up_all(&sess->vha->fcport_waitQ);
1265                         return;
1266                 }
1267                 break;
1268         case DSC_UPD_FCPORT:
1269                 /*
1270                  * This port is not done reporting to upper layer.
1271                  * let it finish
1272                  */
1273                 sess->next_disc_state = DSC_DELETE_PEND;
1274                 sec = jiffies_to_msecs(jiffies -
1275                     sess->jiffies_at_registration)/1000;
1276                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1277                         sess->sec_since_registration = sec;
1278                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1279                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1280                             __func__, sess->port_name, sec);
1281                 }
1282                 return;
1283         default:
1284                 break;
1285         }
1286
1287         spin_lock_irqsave(&sess->vha->work_lock, flags);
1288         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1289                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1290                 return;
1291         }
1292         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1293         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1294
1295         sess->prli_pend_timer = 0;
1296         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1297
1298         qla24xx_chk_fcp_state(sess);
1299
1300         ql_dbg(ql_log_warn, sess->vha, 0xe001,
1301             "Scheduling sess %p for deletion %8phC fc4_type %x\n",
1302             sess, sess->port_name, sess->fc4_type);
1303
1304         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1305 }
1306
1307 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1308 {
1309         struct fc_port *sess;
1310         scsi_qla_host_t *vha = tgt->vha;
1311
1312         list_for_each_entry(sess, &vha->vp_fcports, list) {
1313                 if (sess->se_sess)
1314                         qlt_schedule_sess_for_deletion(sess);
1315         }
1316
1317         /* At this point tgt could be already dead */
1318 }
1319
1320 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, be_id_t s_id,
1321         uint16_t *loop_id)
1322 {
1323         struct qla_hw_data *ha = vha->hw;
1324         dma_addr_t gid_list_dma;
1325         struct gid_list_info *gid_list, *gid;
1326         int res, rc, i;
1327         uint16_t entries;
1328
1329         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1330             &gid_list_dma, GFP_KERNEL);
1331         if (!gid_list) {
1332                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1333                     "qla_target(%d): DMA Alloc failed of %u\n",
1334                     vha->vp_idx, qla2x00_gid_list_size(ha));
1335                 return -ENOMEM;
1336         }
1337
1338         /* Get list of logged in devices */
1339         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1340         if (rc != QLA_SUCCESS) {
1341                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1342                     "qla_target(%d): get_id_list() failed: %x\n",
1343                     vha->vp_idx, rc);
1344                 res = -EBUSY;
1345                 goto out_free_id_list;
1346         }
1347
1348         gid = gid_list;
1349         res = -ENOENT;
1350         for (i = 0; i < entries; i++) {
1351                 if (gid->al_pa == s_id.al_pa &&
1352                     gid->area == s_id.area &&
1353                     gid->domain == s_id.domain) {
1354                         *loop_id = le16_to_cpu(gid->loop_id);
1355                         res = 0;
1356                         break;
1357                 }
1358                 gid = (void *)gid + ha->gid_list_info_size;
1359         }
1360
1361 out_free_id_list:
1362         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1363             gid_list, gid_list_dma);
1364         return res;
1365 }
1366
1367 /*
1368  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1369  * Caller must put it.
1370  */
1371 static struct fc_port *qlt_create_sess(
1372         struct scsi_qla_host *vha,
1373         fc_port_t *fcport,
1374         bool local)
1375 {
1376         struct qla_hw_data *ha = vha->hw;
1377         struct fc_port *sess = fcport;
1378         unsigned long flags;
1379
1380         if (vha->vha_tgt.qla_tgt->tgt_stop)
1381                 return NULL;
1382
1383         if (fcport->se_sess) {
1384                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1385                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1386                             "%s: kref_get_unless_zero failed for %8phC\n",
1387                             __func__, sess->port_name);
1388                         return NULL;
1389                 }
1390                 return fcport;
1391         }
1392         sess->tgt = vha->vha_tgt.qla_tgt;
1393         sess->local = local;
1394
1395         /*
1396          * Under normal circumstances we want to logout from firmware when
1397          * session eventually ends and release corresponding nport handle.
1398          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1399          * code will adjust these flags as necessary.
1400          */
1401         sess->logout_on_delete = 1;
1402         sess->keep_nport_handle = 0;
1403         sess->logout_completed = 0;
1404
1405         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1406             &fcport->port_name[0], sess) < 0) {
1407                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1408                     "(%d) %8phC check_initiator_node_acl failed\n",
1409                     vha->vp_idx, fcport->port_name);
1410                 return NULL;
1411         } else {
1412                 kref_init(&fcport->sess_kref);
1413                 /*
1414                  * Take an extra reference to ->sess_kref here to handle
1415                  * fc_port access across ->tgt.sess_lock reaquire.
1416                  */
1417                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1418                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1419                             "%s: kref_get_unless_zero failed for %8phC\n",
1420                             __func__, sess->port_name);
1421                         return NULL;
1422                 }
1423
1424                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1425                 if (!IS_SW_RESV_ADDR(sess->d_id))
1426                         vha->vha_tgt.qla_tgt->sess_count++;
1427
1428                 qlt_do_generation_tick(vha, &sess->generation);
1429                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1430         }
1431
1432         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1433             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1434             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1435             vha->vha_tgt.qla_tgt->sess_count);
1436
1437         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1438             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1439             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1440             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1441             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1442             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1443
1444         return sess;
1445 }
1446
1447 /*
1448  * max_gen - specifies maximum session generation
1449  * at which this deletion requestion is still valid
1450  */
1451 void
1452 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1453 {
1454         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1455         struct fc_port *sess = fcport;
1456         unsigned long flags;
1457
1458         if (!vha->hw->tgt.tgt_ops)
1459                 return;
1460
1461         if (!tgt)
1462                 return;
1463
1464         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1465         if (tgt->tgt_stop) {
1466                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1467                 return;
1468         }
1469         if (!sess->se_sess) {
1470                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1471                 return;
1472         }
1473
1474         if (max_gen - sess->generation < 0) {
1475                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1476                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1477                     "Ignoring stale deletion request for se_sess %p / sess %p"
1478                     " for port %8phC, req_gen %d, sess_gen %d\n",
1479                     sess->se_sess, sess, sess->port_name, max_gen,
1480                     sess->generation);
1481                 return;
1482         }
1483
1484         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1485
1486         sess->local = 1;
1487         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1488         qlt_schedule_sess_for_deletion(sess);
1489 }
1490
1491 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1492 {
1493         struct qla_hw_data *ha = tgt->ha;
1494         unsigned long flags;
1495         int res;
1496         /*
1497          * We need to protect against race, when tgt is freed before or
1498          * inside wake_up()
1499          */
1500         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1501         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1502             "tgt %p, sess_count=%d\n",
1503             tgt, tgt->sess_count);
1504         res = (tgt->sess_count == 0);
1505         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1506
1507         return res;
1508 }
1509
1510 /* Called by tcm_qla2xxx configfs code */
1511 int qlt_stop_phase1(struct qla_tgt *tgt)
1512 {
1513         struct scsi_qla_host *vha = tgt->vha;
1514         struct qla_hw_data *ha = tgt->ha;
1515         unsigned long flags;
1516
1517         mutex_lock(&ha->optrom_mutex);
1518         mutex_lock(&qla_tgt_mutex);
1519
1520         if (tgt->tgt_stop || tgt->tgt_stopped) {
1521                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1522                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1523                 mutex_unlock(&qla_tgt_mutex);
1524                 mutex_unlock(&ha->optrom_mutex);
1525                 return -EPERM;
1526         }
1527
1528         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1529             vha->host_no, vha);
1530         /*
1531          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1532          * Lock is needed, because we still can get an incoming packet.
1533          */
1534         mutex_lock(&vha->vha_tgt.tgt_mutex);
1535         tgt->tgt_stop = 1;
1536         qlt_clear_tgt_db(tgt);
1537         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1538         mutex_unlock(&qla_tgt_mutex);
1539
1540         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1541             "Waiting for sess works (tgt %p)", tgt);
1542         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1543         do {
1544                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1545                 flush_work(&tgt->sess_work);
1546                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1547         } while (!list_empty(&tgt->sess_works_list));
1548         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1549
1550         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1551             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1552
1553         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1554
1555         /* Big hammer */
1556         if (!ha->flags.host_shutting_down &&
1557             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1558                 qlt_disable_vha(vha);
1559
1560         /* Wait for sessions to clear out (just in case) */
1561         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1562         mutex_unlock(&ha->optrom_mutex);
1563
1564         return 0;
1565 }
1566 EXPORT_SYMBOL(qlt_stop_phase1);
1567
1568 /* Called by tcm_qla2xxx configfs code */
1569 void qlt_stop_phase2(struct qla_tgt *tgt)
1570 {
1571         scsi_qla_host_t *vha = tgt->vha;
1572
1573         if (tgt->tgt_stopped) {
1574                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1575                     "Already in tgt->tgt_stopped state\n");
1576                 dump_stack();
1577                 return;
1578         }
1579         if (!tgt->tgt_stop) {
1580                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1581                     "%s: phase1 stop is not completed\n", __func__);
1582                 dump_stack();
1583                 return;
1584         }
1585
1586         mutex_lock(&tgt->ha->optrom_mutex);
1587         mutex_lock(&vha->vha_tgt.tgt_mutex);
1588         tgt->tgt_stop = 0;
1589         tgt->tgt_stopped = 1;
1590         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1591         mutex_unlock(&tgt->ha->optrom_mutex);
1592
1593         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1594             tgt);
1595
1596         switch (vha->qlini_mode) {
1597         case QLA2XXX_INI_MODE_EXCLUSIVE:
1598                 vha->flags.online = 1;
1599                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1600                 break;
1601         default:
1602                 break;
1603         }
1604 }
1605 EXPORT_SYMBOL(qlt_stop_phase2);
1606
1607 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1608 static void qlt_release(struct qla_tgt *tgt)
1609 {
1610         scsi_qla_host_t *vha = tgt->vha;
1611         void *node;
1612         u64 key = 0;
1613         u16 i;
1614         struct qla_qpair_hint *h;
1615         struct qla_hw_data *ha = vha->hw;
1616
1617         if (!tgt->tgt_stop && !tgt->tgt_stopped)
1618                 qlt_stop_phase1(tgt);
1619
1620         if (!tgt->tgt_stopped)
1621                 qlt_stop_phase2(tgt);
1622
1623         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1624                 unsigned long flags;
1625
1626                 h = &tgt->qphints[i];
1627                 if (h->qpair) {
1628                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1629                         list_del(&h->hint_elem);
1630                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1631                         h->qpair = NULL;
1632                 }
1633         }
1634         kfree(tgt->qphints);
1635         mutex_lock(&qla_tgt_mutex);
1636         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1637         mutex_unlock(&qla_tgt_mutex);
1638
1639         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1640                 btree_remove64(&tgt->lun_qpair_map, key);
1641
1642         btree_destroy64(&tgt->lun_qpair_map);
1643
1644         if (vha->vp_idx)
1645                 if (ha->tgt.tgt_ops &&
1646                     ha->tgt.tgt_ops->remove_target &&
1647                     vha->vha_tgt.target_lport_ptr)
1648                         ha->tgt.tgt_ops->remove_target(vha);
1649
1650         vha->vha_tgt.qla_tgt = NULL;
1651
1652         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1653             "Release of tgt %p finished\n", tgt);
1654
1655         kfree(tgt);
1656 }
1657
1658 /* ha->hardware_lock supposed to be held on entry */
1659 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1660         const void *param, unsigned int param_size)
1661 {
1662         struct qla_tgt_sess_work_param *prm;
1663         unsigned long flags;
1664
1665         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1666         if (!prm) {
1667                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1668                     "qla_target(%d): Unable to create session "
1669                     "work, command will be refused", 0);
1670                 return -ENOMEM;
1671         }
1672
1673         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1674             "Scheduling work (type %d, prm %p)"
1675             " to find session for param %p (size %d, tgt %p)\n",
1676             type, prm, param, param_size, tgt);
1677
1678         prm->type = type;
1679         memcpy(&prm->tm_iocb, param, param_size);
1680
1681         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1682         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1683         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1684
1685         schedule_work(&tgt->sess_work);
1686
1687         return 0;
1688 }
1689
1690 /*
1691  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1692  */
1693 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1694         struct imm_ntfy_from_isp *ntfy,
1695         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1696         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1697 {
1698         struct scsi_qla_host *vha = qpair->vha;
1699         struct qla_hw_data *ha = vha->hw;
1700         request_t *pkt;
1701         struct nack_to_isp *nack;
1702
1703         if (!ha->flags.fw_started)
1704                 return;
1705
1706         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1707
1708         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1709         if (!pkt) {
1710                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1711                     "qla_target(%d): %s failed: unable to allocate "
1712                     "request packet\n", vha->vp_idx, __func__);
1713                 return;
1714         }
1715
1716         if (vha->vha_tgt.qla_tgt != NULL)
1717                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1718
1719         pkt->entry_type = NOTIFY_ACK_TYPE;
1720         pkt->entry_count = 1;
1721
1722         nack = (struct nack_to_isp *)pkt;
1723         nack->ox_id = ntfy->ox_id;
1724
1725         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1726         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1727         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1728                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1729                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
1730         }
1731         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1732         nack->u.isp24.status = ntfy->u.isp24.status;
1733         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1734         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1735         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1736         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1737         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1738         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1739         nack->u.isp24.srr_reject_code = srr_reject_code;
1740         nack->u.isp24.srr_reject_code_expl = srr_explan;
1741         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1742
1743         /* TODO qualify this with EDIF enable */
1744         if (ntfy->u.isp24.status_subcode == ELS_PLOGI &&
1745             (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
1746                 nack->u.isp24.flags |= cpu_to_le16(NOTIFY_ACK_FLAGS_FCSP);
1747         }
1748
1749         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1750             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1751             vha->vp_idx, nack->u.isp24.status);
1752
1753         /* Memory Barrier */
1754         wmb();
1755         qla2x00_start_iocbs(vha, qpair->req);
1756 }
1757
1758 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1759 {
1760         struct scsi_qla_host *vha = mcmd->vha;
1761         struct qla_hw_data *ha = vha->hw;
1762         struct abts_resp_to_24xx *resp;
1763         __le32 f_ctl;
1764         uint32_t h;
1765         uint8_t *p;
1766         int rc;
1767         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1768         struct qla_qpair *qpair = mcmd->qpair;
1769
1770         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1771             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1772             ha, mcmd->fc_tm_rsp);
1773
1774         rc = qlt_check_reserve_free_req(qpair, 1);
1775         if (rc) {
1776                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1777                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1778                     vha->vp_idx, __func__);
1779                 return -EAGAIN;
1780         }
1781
1782         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1783         memset(resp, 0, sizeof(*resp));
1784
1785         h = qlt_make_handle(qpair);
1786         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1787                 /*
1788                  * CTIO type 7 from the firmware doesn't provide a way to
1789                  * know the initiator's LOOP ID, hence we can't find
1790                  * the session and, so, the command.
1791                  */
1792                 return -EAGAIN;
1793         } else {
1794                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1795         }
1796
1797         resp->handle = make_handle(qpair->req->id, h);
1798         resp->entry_type = ABTS_RESP_24XX;
1799         resp->entry_count = 1;
1800         resp->nport_handle = abts->nport_handle;
1801         resp->vp_index = vha->vp_idx;
1802         resp->sof_type = abts->sof_type;
1803         resp->exchange_address = abts->exchange_address;
1804         resp->fcp_hdr_le = abts->fcp_hdr_le;
1805         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1806             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1807             F_CTL_SEQ_INITIATIVE);
1808         p = (uint8_t *)&f_ctl;
1809         resp->fcp_hdr_le.f_ctl[0] = *p++;
1810         resp->fcp_hdr_le.f_ctl[1] = *p++;
1811         resp->fcp_hdr_le.f_ctl[2] = *p;
1812
1813         resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1814         resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1815
1816         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1817         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1818                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1819                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1820                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1821                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1822                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1823                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1824         } else {
1825                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1826                 resp->payload.ba_rjt.reason_code =
1827                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1828                 /* Other bytes are zero */
1829         }
1830
1831         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1832
1833         /* Memory Barrier */
1834         wmb();
1835         if (qpair->reqq_start_iocbs)
1836                 qpair->reqq_start_iocbs(qpair);
1837         else
1838                 qla2x00_start_iocbs(vha, qpair->req);
1839
1840         return rc;
1841 }
1842
1843 /*
1844  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1845  */
1846 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1847         struct abts_recv_from_24xx *abts, uint32_t status,
1848         bool ids_reversed)
1849 {
1850         struct scsi_qla_host *vha = qpair->vha;
1851         struct qla_hw_data *ha = vha->hw;
1852         struct abts_resp_to_24xx *resp;
1853         __le32 f_ctl;
1854         uint8_t *p;
1855
1856         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1857             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1858             ha, abts, status);
1859
1860         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1861             NULL);
1862         if (!resp) {
1863                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1864                     "qla_target(%d): %s failed: unable to allocate "
1865                     "request packet", vha->vp_idx, __func__);
1866                 return;
1867         }
1868
1869         resp->entry_type = ABTS_RESP_24XX;
1870         resp->handle = QLA_TGT_SKIP_HANDLE;
1871         resp->entry_count = 1;
1872         resp->nport_handle = abts->nport_handle;
1873         resp->vp_index = vha->vp_idx;
1874         resp->sof_type = abts->sof_type;
1875         resp->exchange_address = abts->exchange_address;
1876         resp->fcp_hdr_le = abts->fcp_hdr_le;
1877         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1878             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1879             F_CTL_SEQ_INITIATIVE);
1880         p = (uint8_t *)&f_ctl;
1881         resp->fcp_hdr_le.f_ctl[0] = *p++;
1882         resp->fcp_hdr_le.f_ctl[1] = *p++;
1883         resp->fcp_hdr_le.f_ctl[2] = *p;
1884         if (ids_reversed) {
1885                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1886                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1887         } else {
1888                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1889                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1890         }
1891         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1892         if (status == FCP_TMF_CMPL) {
1893                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1894                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1895                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1896                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1897                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1898                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1899         } else {
1900                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1901                 resp->payload.ba_rjt.reason_code =
1902                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1903                 /* Other bytes are zero */
1904         }
1905
1906         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1907
1908         /* Memory Barrier */
1909         wmb();
1910         if (qpair->reqq_start_iocbs)
1911                 qpair->reqq_start_iocbs(qpair);
1912         else
1913                 qla2x00_start_iocbs(vha, qpair->req);
1914 }
1915
1916 /*
1917  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1918  */
1919 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1920     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1921 {
1922         struct ctio7_to_24xx *ctio;
1923         u16 tmp;
1924         struct abts_recv_from_24xx *entry;
1925
1926         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1927         if (ctio == NULL) {
1928                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1929                     "qla_target(%d): %s failed: unable to allocate "
1930                     "request packet\n", vha->vp_idx, __func__);
1931                 return;
1932         }
1933
1934         if (mcmd)
1935                 /* abts from remote port */
1936                 entry = &mcmd->orig_iocb.abts;
1937         else
1938                 /* abts from this driver.  */
1939                 entry = (struct abts_recv_from_24xx *)pkt;
1940
1941         /*
1942          * We've got on entrance firmware's response on by us generated
1943          * ABTS response. So, in it ID fields are reversed.
1944          */
1945
1946         ctio->entry_type = CTIO_TYPE7;
1947         ctio->entry_count = 1;
1948         ctio->nport_handle = entry->nport_handle;
1949         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1950         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1951         ctio->vp_index = vha->vp_idx;
1952         ctio->exchange_addr = entry->exchange_addr_to_abort;
1953         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1954
1955         if (mcmd) {
1956                 ctio->initiator_id = entry->fcp_hdr_le.s_id;
1957
1958                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1959                         tmp |= (mcmd->abort_io_attr << 9);
1960                 else if (qpair->retry_term_cnt & 1)
1961                         tmp |= (0x4 << 9);
1962         } else {
1963                 ctio->initiator_id = entry->fcp_hdr_le.d_id;
1964
1965                 if (qpair->retry_term_cnt & 1)
1966                         tmp |= (0x4 << 9);
1967         }
1968         ctio->u.status1.flags = cpu_to_le16(tmp);
1969         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1970
1971         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1972             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1973             le16_to_cpu(ctio->u.status1.flags),
1974             le16_to_cpu(ctio->u.status1.ox_id),
1975             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1976
1977         /* Memory Barrier */
1978         wmb();
1979         if (qpair->reqq_start_iocbs)
1980                 qpair->reqq_start_iocbs(qpair);
1981         else
1982                 qla2x00_start_iocbs(vha, qpair->req);
1983
1984         if (mcmd)
1985                 qlt_build_abts_resp_iocb(mcmd);
1986         else
1987                 qlt_24xx_send_abts_resp(qpair,
1988                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
1989
1990 }
1991
1992 /* drop cmds for the given lun
1993  * XXX only looks for cmds on the port through which lun reset was recieved
1994  * XXX does not go through the list of other port (which may have cmds
1995  *     for the same lun)
1996  */
1997 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
1998 {
1999         struct qla_tgt_sess_op *op;
2000         struct qla_tgt_cmd *cmd;
2001         uint32_t key;
2002         unsigned long flags;
2003
2004         key = sid_to_key(s_id);
2005         spin_lock_irqsave(&vha->cmd_list_lock, flags);
2006         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
2007                 uint32_t op_key;
2008                 u64 op_lun;
2009
2010                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
2011                 op_lun = scsilun_to_int(
2012                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
2013                 if (op_key == key && op_lun == lun)
2014                         op->aborted = true;
2015         }
2016
2017         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
2018                 uint32_t cmd_key;
2019                 u64 cmd_lun;
2020
2021                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
2022                 cmd_lun = scsilun_to_int(
2023                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2024                 if (cmd_key == key && cmd_lun == lun)
2025                         cmd->aborted = 1;
2026         }
2027         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2028 }
2029
2030 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2031     uint64_t unpacked_lun)
2032 {
2033         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2034         struct qla_qpair_hint *h = NULL;
2035
2036         if (vha->flags.qpairs_available) {
2037                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2038                 if (!h)
2039                         h = &tgt->qphints[0];
2040         } else {
2041                 h = &tgt->qphints[0];
2042         }
2043
2044         return h;
2045 }
2046
2047 static void qlt_do_tmr_work(struct work_struct *work)
2048 {
2049         struct qla_tgt_mgmt_cmd *mcmd =
2050                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2051         struct qla_hw_data *ha = mcmd->vha->hw;
2052         int rc;
2053         uint32_t tag;
2054         unsigned long flags;
2055
2056         switch (mcmd->tmr_func) {
2057         case QLA_TGT_ABTS:
2058                 tag = le32_to_cpu(mcmd->orig_iocb.abts.exchange_addr_to_abort);
2059                 break;
2060         default:
2061                 tag = 0;
2062                 break;
2063         }
2064
2065         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2066             mcmd->tmr_func, tag);
2067
2068         if (rc != 0) {
2069                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2070                 switch (mcmd->tmr_func) {
2071                 case QLA_TGT_ABTS:
2072                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2073                         qlt_build_abts_resp_iocb(mcmd);
2074                         break;
2075                 case QLA_TGT_LUN_RESET:
2076                 case QLA_TGT_CLEAR_TS:
2077                 case QLA_TGT_ABORT_TS:
2078                 case QLA_TGT_CLEAR_ACA:
2079                 case QLA_TGT_TARGET_RESET:
2080                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2081                             qla_sam_status);
2082                         break;
2083
2084                 case QLA_TGT_ABORT_ALL:
2085                 case QLA_TGT_NEXUS_LOSS_SESS:
2086                 case QLA_TGT_NEXUS_LOSS:
2087                         qlt_send_notify_ack(mcmd->qpair,
2088                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2089                         break;
2090                 }
2091                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2092
2093                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2094                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2095                     mcmd->vha->vp_idx, rc);
2096                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2097         }
2098 }
2099
2100 /* ha->hardware_lock supposed to be held on entry */
2101 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2102         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2103 {
2104         struct qla_hw_data *ha = vha->hw;
2105         struct qla_tgt_mgmt_cmd *mcmd;
2106         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2107         struct qla_tgt_cmd *abort_cmd;
2108
2109         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2110             "qla_target(%d): task abort (tag=%d)\n",
2111             vha->vp_idx, abts->exchange_addr_to_abort);
2112
2113         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2114         if (mcmd == NULL) {
2115                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2116                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2117                     vha->vp_idx, __func__);
2118                 return -ENOMEM;
2119         }
2120         memset(mcmd, 0, sizeof(*mcmd));
2121         mcmd->cmd_type = TYPE_TGT_TMCMD;
2122         mcmd->sess = sess;
2123         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2124         mcmd->reset_count = ha->base_qpair->chip_reset;
2125         mcmd->tmr_func = QLA_TGT_ABTS;
2126         mcmd->qpair = h->qpair;
2127         mcmd->vha = vha;
2128
2129         /*
2130          * LUN is looked up by target-core internally based on the passed
2131          * abts->exchange_addr_to_abort tag.
2132          */
2133         mcmd->se_cmd.cpuid = h->cpuid;
2134
2135         abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2136                                 le32_to_cpu(abts->exchange_addr_to_abort));
2137         if (!abort_cmd) {
2138                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2139                 return -EIO;
2140         }
2141         mcmd->unpacked_lun = abort_cmd->se_cmd.orig_fe_lun;
2142
2143         if (abort_cmd->qpair) {
2144                 mcmd->qpair = abort_cmd->qpair;
2145                 mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2146                 mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2147                 mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2148         }
2149
2150         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2151         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2152
2153         return 0;
2154 }
2155
2156 /*
2157  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2158  */
2159 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2160         struct abts_recv_from_24xx *abts)
2161 {
2162         struct qla_hw_data *ha = vha->hw;
2163         struct fc_port *sess;
2164         uint32_t tag = le32_to_cpu(abts->exchange_addr_to_abort);
2165         be_id_t s_id;
2166         int rc;
2167         unsigned long flags;
2168
2169         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2170                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2171                     "qla_target(%d): ABTS: Abort Sequence not "
2172                     "supported\n", vha->vp_idx);
2173                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2174                     false);
2175                 return;
2176         }
2177
2178         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2179                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2180                     "qla_target(%d): ABTS: Unknown Exchange "
2181                     "Address received\n", vha->vp_idx);
2182                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2183                     false);
2184                 return;
2185         }
2186
2187         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2188             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2189             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id.domain,
2190             abts->fcp_hdr_le.s_id.area, abts->fcp_hdr_le.s_id.al_pa, tag,
2191             le32_to_cpu(abts->fcp_hdr_le.parameter));
2192
2193         s_id = le_id_to_be(abts->fcp_hdr_le.s_id);
2194
2195         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2196         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2197         if (!sess) {
2198                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2199                     "qla_target(%d): task abort for non-existent session\n",
2200                     vha->vp_idx);
2201                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2202
2203                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2204                             false);
2205                 return;
2206         }
2207         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2208
2209
2210         if (sess->deleted) {
2211                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2212                     false);
2213                 return;
2214         }
2215
2216         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2217         if (rc != 0) {
2218                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2219                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2220                     vha->vp_idx, rc);
2221                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2222                     false);
2223                 return;
2224         }
2225 }
2226
2227 /*
2228  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2229  */
2230 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2231         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2232 {
2233         struct scsi_qla_host *ha = mcmd->vha;
2234         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2235         struct ctio7_to_24xx *ctio;
2236         uint16_t temp;
2237
2238         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2239             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2240             ha, atio, resp_code);
2241
2242
2243         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2244         if (ctio == NULL) {
2245                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2246                     "qla_target(%d): %s failed: unable to allocate "
2247                     "request packet\n", ha->vp_idx, __func__);
2248                 return;
2249         }
2250
2251         ctio->entry_type = CTIO_TYPE7;
2252         ctio->entry_count = 1;
2253         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2254         ctio->nport_handle = cpu_to_le16(mcmd->sess->loop_id);
2255         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2256         ctio->vp_index = ha->vp_idx;
2257         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2258         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2259         temp = (atio->u.isp24.attr << 9)|
2260                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2261         ctio->u.status1.flags = cpu_to_le16(temp);
2262         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2263         ctio->u.status1.ox_id = cpu_to_le16(temp);
2264         ctio->u.status1.scsi_status =
2265             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2266         ctio->u.status1.response_len = cpu_to_le16(8);
2267         ctio->u.status1.sense_data[0] = resp_code;
2268
2269         /* Memory Barrier */
2270         wmb();
2271         if (qpair->reqq_start_iocbs)
2272                 qpair->reqq_start_iocbs(qpair);
2273         else
2274                 qla2x00_start_iocbs(ha, qpair->req);
2275 }
2276
2277 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2278 {
2279         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2280 }
2281 EXPORT_SYMBOL(qlt_free_mcmd);
2282
2283 /*
2284  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2285  * reacquire
2286  */
2287 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2288     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2289 {
2290         struct atio_from_isp *atio = &cmd->atio;
2291         struct ctio7_to_24xx *ctio;
2292         uint16_t temp;
2293         struct scsi_qla_host *vha = cmd->vha;
2294
2295         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2296             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2297             "sense_key=%02x, asc=%02x, ascq=%02x",
2298             vha, atio, scsi_status, sense_key, asc, ascq);
2299
2300         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2301         if (!ctio) {
2302                 ql_dbg(ql_dbg_async, vha, 0x3067,
2303                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2304                     vha->host_no, __func__);
2305                 goto out;
2306         }
2307
2308         ctio->entry_type = CTIO_TYPE7;
2309         ctio->entry_count = 1;
2310         ctio->handle = QLA_TGT_SKIP_HANDLE;
2311         ctio->nport_handle = cpu_to_le16(cmd->sess->loop_id);
2312         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2313         ctio->vp_index = vha->vp_idx;
2314         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2315         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2316         temp = (atio->u.isp24.attr << 9) |
2317             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2318         ctio->u.status1.flags = cpu_to_le16(temp);
2319         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2320         ctio->u.status1.ox_id = cpu_to_le16(temp);
2321         ctio->u.status1.scsi_status =
2322             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2323         ctio->u.status1.response_len = cpu_to_le16(18);
2324         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2325
2326         if (ctio->u.status1.residual != 0)
2327                 ctio->u.status1.scsi_status |=
2328                     cpu_to_le16(SS_RESIDUAL_UNDER);
2329
2330         /* Fixed format sense data. */
2331         ctio->u.status1.sense_data[0] = 0x70;
2332         ctio->u.status1.sense_data[2] = sense_key;
2333         /* Additional sense length */
2334         ctio->u.status1.sense_data[7] = 0xa;
2335         /* ASC and ASCQ */
2336         ctio->u.status1.sense_data[12] = asc;
2337         ctio->u.status1.sense_data[13] = ascq;
2338
2339         /* Memory Barrier */
2340         wmb();
2341
2342         if (qpair->reqq_start_iocbs)
2343                 qpair->reqq_start_iocbs(qpair);
2344         else
2345                 qla2x00_start_iocbs(vha, qpair->req);
2346
2347 out:
2348         return;
2349 }
2350
2351 /* callback from target fabric module code */
2352 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2353 {
2354         struct scsi_qla_host *vha = mcmd->sess->vha;
2355         struct qla_hw_data *ha = vha->hw;
2356         unsigned long flags;
2357         struct qla_qpair *qpair = mcmd->qpair;
2358         bool free_mcmd = true;
2359
2360         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2361             "TM response mcmd (%p) status %#x state %#x",
2362             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2363
2364         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2365
2366         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2367                 /*
2368                  * Either the port is not online or this request was from
2369                  * previous life, just abort the processing.
2370                  */
2371                 ql_dbg(ql_dbg_async, vha, 0xe100,
2372                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2373                         vha->flags.online, qla2x00_reset_active(vha),
2374                         mcmd->reset_count, qpair->chip_reset);
2375                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2376                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2377                 return;
2378         }
2379
2380         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2381                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2382                 case ELS_LOGO:
2383                 case ELS_PRLO:
2384                 case ELS_TPRLO:
2385                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2386                             "TM response logo %8phC status %#x state %#x",
2387                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2388                             mcmd->flags);
2389                         qlt_schedule_sess_for_deletion(mcmd->sess);
2390                         break;
2391                 default:
2392                         qlt_send_notify_ack(vha->hw->base_qpair,
2393                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2394                         break;
2395                 }
2396         } else {
2397                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2398                         qlt_build_abts_resp_iocb(mcmd);
2399                         free_mcmd = false;
2400                 } else
2401                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2402                             mcmd->fc_tm_rsp);
2403         }
2404         /*
2405          * Make the callback for ->free_mcmd() to queue_work() and invoke
2406          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2407          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2408          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2409          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2410          * qlt_xmit_tm_rsp() returns here..
2411          */
2412         if (free_mcmd)
2413                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2414
2415         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2416 }
2417 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2418
2419 /* No locks */
2420 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2421 {
2422         struct qla_tgt_cmd *cmd = prm->cmd;
2423
2424         BUG_ON(cmd->sg_cnt == 0);
2425
2426         prm->sg = (struct scatterlist *)cmd->sg;
2427         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2428             cmd->sg_cnt, cmd->dma_data_direction);
2429         if (unlikely(prm->seg_cnt == 0))
2430                 goto out_err;
2431
2432         prm->cmd->sg_mapped = 1;
2433
2434         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2435                 /*
2436                  * If greater than four sg entries then we need to allocate
2437                  * the continuation entries
2438                  */
2439                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2440                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2441                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2442                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2443         } else {
2444                 /* DIF */
2445                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2446                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2447                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2448                         prm->tot_dsds = prm->seg_cnt;
2449                 } else
2450                         prm->tot_dsds = prm->seg_cnt;
2451
2452                 if (cmd->prot_sg_cnt) {
2453                         prm->prot_sg      = cmd->prot_sg;
2454                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2455                                 cmd->prot_sg, cmd->prot_sg_cnt,
2456                                 cmd->dma_data_direction);
2457                         if (unlikely(prm->prot_seg_cnt == 0))
2458                                 goto out_err;
2459
2460                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2461                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2462                                 /* Dif Bundling not support here */
2463                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2464                                                                 cmd->blk_sz);
2465                                 prm->tot_dsds += prm->prot_seg_cnt;
2466                         } else
2467                                 prm->tot_dsds += prm->prot_seg_cnt;
2468                 }
2469         }
2470
2471         return 0;
2472
2473 out_err:
2474         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2475             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2476             0, prm->cmd->sg_cnt);
2477         return -1;
2478 }
2479
2480 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2481 {
2482         struct qla_hw_data *ha;
2483         struct qla_qpair *qpair;
2484
2485         if (!cmd->sg_mapped)
2486                 return;
2487
2488         qpair = cmd->qpair;
2489
2490         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2491             cmd->dma_data_direction);
2492         cmd->sg_mapped = 0;
2493
2494         if (cmd->prot_sg_cnt)
2495                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2496                         cmd->dma_data_direction);
2497
2498         if (!cmd->ctx)
2499                 return;
2500         ha = vha->hw;
2501         if (cmd->ctx_dsd_alloced)
2502                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2503
2504         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2505 }
2506
2507 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2508         uint32_t req_cnt)
2509 {
2510         uint32_t cnt;
2511         struct req_que *req = qpair->req;
2512
2513         if (req->cnt < (req_cnt + 2)) {
2514                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2515                     rd_reg_dword_relaxed(req->req_q_out));
2516
2517                 if  (req->ring_index < cnt)
2518                         req->cnt = cnt - req->ring_index;
2519                 else
2520                         req->cnt = req->length - (req->ring_index - cnt);
2521
2522                 if (unlikely(req->cnt < (req_cnt + 2)))
2523                         return -EAGAIN;
2524         }
2525
2526         req->cnt -= req_cnt;
2527
2528         return 0;
2529 }
2530
2531 /*
2532  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2533  */
2534 static inline void *qlt_get_req_pkt(struct req_que *req)
2535 {
2536         /* Adjust ring index. */
2537         req->ring_index++;
2538         if (req->ring_index == req->length) {
2539                 req->ring_index = 0;
2540                 req->ring_ptr = req->ring;
2541         } else {
2542                 req->ring_ptr++;
2543         }
2544         return (cont_entry_t *)req->ring_ptr;
2545 }
2546
2547 /* ha->hardware_lock supposed to be held on entry */
2548 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2549 {
2550         uint32_t h;
2551         int index;
2552         uint8_t found = 0;
2553         struct req_que *req = qpair->req;
2554
2555         h = req->current_outstanding_cmd;
2556
2557         for (index = 1; index < req->num_outstanding_cmds; index++) {
2558                 h++;
2559                 if (h == req->num_outstanding_cmds)
2560                         h = 1;
2561
2562                 if (h == QLA_TGT_SKIP_HANDLE)
2563                         continue;
2564
2565                 if (!req->outstanding_cmds[h]) {
2566                         found = 1;
2567                         break;
2568                 }
2569         }
2570
2571         if (found) {
2572                 req->current_outstanding_cmd = h;
2573         } else {
2574                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2575                     "qla_target(%d): Ran out of empty cmd slots\n",
2576                     qpair->vha->vp_idx);
2577                 h = QLA_TGT_NULL_HANDLE;
2578         }
2579
2580         return h;
2581 }
2582
2583 /* ha->hardware_lock supposed to be held on entry */
2584 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2585         struct qla_tgt_prm *prm)
2586 {
2587         uint32_t h;
2588         struct ctio7_to_24xx *pkt;
2589         struct atio_from_isp *atio = &prm->cmd->atio;
2590         uint16_t temp;
2591         struct qla_tgt_cmd      *cmd = prm->cmd;
2592
2593         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2594         prm->pkt = pkt;
2595         memset(pkt, 0, sizeof(*pkt));
2596
2597         pkt->entry_type = CTIO_TYPE7;
2598         pkt->entry_count = (uint8_t)prm->req_cnt;
2599         pkt->vp_index = prm->cmd->vp_idx;
2600
2601         h = qlt_make_handle(qpair);
2602         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2603                 /*
2604                  * CTIO type 7 from the firmware doesn't provide a way to
2605                  * know the initiator's LOOP ID, hence we can't find
2606                  * the session and, so, the command.
2607                  */
2608                 return -EAGAIN;
2609         } else
2610                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2611
2612         pkt->handle = make_handle(qpair->req->id, h);
2613         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2614         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2615         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2616         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2617         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2618         temp = atio->u.isp24.attr << 9;
2619         pkt->u.status0.flags |= cpu_to_le16(temp);
2620         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2621         pkt->u.status0.ox_id = cpu_to_le16(temp);
2622         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2623
2624         if (cmd->edif) {
2625                 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2626                         prm->cmd->sess->edif.rx_bytes += cmd->bufflen;
2627                 if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2628                         prm->cmd->sess->edif.tx_bytes += cmd->bufflen;
2629
2630                 pkt->u.status0.edif_flags |= EF_EN_EDIF;
2631         }
2632
2633         return 0;
2634 }
2635
2636 /*
2637  * ha->hardware_lock supposed to be held on entry. We have already made sure
2638  * that there is sufficient amount of request entries to not drop it.
2639  */
2640 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2641 {
2642         int cnt;
2643         struct dsd64 *cur_dsd;
2644
2645         /* Build continuation packets */
2646         while (prm->seg_cnt > 0) {
2647                 cont_a64_entry_t *cont_pkt64 =
2648                         (cont_a64_entry_t *)qlt_get_req_pkt(
2649                            prm->cmd->qpair->req);
2650
2651                 /*
2652                  * Make sure that from cont_pkt64 none of
2653                  * 64-bit specific fields used for 32-bit
2654                  * addressing. Cast to (cont_entry_t *) for
2655                  * that.
2656                  */
2657
2658                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2659
2660                 cont_pkt64->entry_count = 1;
2661                 cont_pkt64->sys_define = 0;
2662
2663                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2664                 cur_dsd = cont_pkt64->dsd;
2665
2666                 /* Load continuation entry data segments */
2667                 for (cnt = 0;
2668                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2669                     cnt++, prm->seg_cnt--) {
2670                         append_dsd64(&cur_dsd, prm->sg);
2671                         prm->sg = sg_next(prm->sg);
2672                 }
2673         }
2674 }
2675
2676 /*
2677  * ha->hardware_lock supposed to be held on entry. We have already made sure
2678  * that there is sufficient amount of request entries to not drop it.
2679  */
2680 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2681 {
2682         int cnt;
2683         struct dsd64 *cur_dsd;
2684         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2685
2686         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2687
2688         /* Setup packet address segment pointer */
2689         cur_dsd = &pkt24->u.status0.dsd;
2690
2691         /* Set total data segment count */
2692         if (prm->seg_cnt)
2693                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2694
2695         if (prm->seg_cnt == 0) {
2696                 /* No data transfer */
2697                 cur_dsd->address = 0;
2698                 cur_dsd->length = 0;
2699                 return;
2700         }
2701
2702         /* If scatter gather */
2703
2704         /* Load command entry data segments */
2705         for (cnt = 0;
2706             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2707             cnt++, prm->seg_cnt--) {
2708                 append_dsd64(&cur_dsd, prm->sg);
2709                 prm->sg = sg_next(prm->sg);
2710         }
2711
2712         qlt_load_cont_data_segments(prm);
2713 }
2714
2715 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2716 {
2717         return cmd->bufflen > 0;
2718 }
2719
2720 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2721 {
2722         struct qla_tgt_cmd *cmd;
2723         struct scsi_qla_host *vha;
2724
2725         /* asc 0x10=dif error */
2726         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2727                 cmd = prm->cmd;
2728                 vha = cmd->vha;
2729                 /* ASCQ */
2730                 switch (prm->sense_buffer[13]) {
2731                 case 1:
2732                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2733                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2734                             "se_cmd=%p tag[%x]",
2735                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2736                             cmd->atio.u.isp24.exchange_addr);
2737                         break;
2738                 case 2:
2739                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2740                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2741                             "se_cmd=%p tag[%x]",
2742                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2743                             cmd->atio.u.isp24.exchange_addr);
2744                         break;
2745                 case 3:
2746                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2747                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2748                             "se_cmd=%p tag[%x]",
2749                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2750                             cmd->atio.u.isp24.exchange_addr);
2751                         break;
2752                 default:
2753                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2754                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2755                             "se_cmd=%p tag[%x]",
2756                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2757                             cmd->atio.u.isp24.exchange_addr);
2758                         break;
2759                 }
2760                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2761         }
2762 }
2763
2764 /*
2765  * Called without ha->hardware_lock held
2766  */
2767 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2768         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2769         uint32_t *full_req_cnt)
2770 {
2771         struct se_cmd *se_cmd = &cmd->se_cmd;
2772         struct qla_qpair *qpair = cmd->qpair;
2773
2774         prm->cmd = cmd;
2775         prm->tgt = cmd->tgt;
2776         prm->pkt = NULL;
2777         prm->rq_result = scsi_status;
2778         prm->sense_buffer = &cmd->sense_buffer[0];
2779         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2780         prm->sg = NULL;
2781         prm->seg_cnt = -1;
2782         prm->req_cnt = 1;
2783         prm->residual = 0;
2784         prm->add_status_pkt = 0;
2785         prm->prot_sg = NULL;
2786         prm->prot_seg_cnt = 0;
2787         prm->tot_dsds = 0;
2788
2789         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2790                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2791                         return -EAGAIN;
2792         }
2793
2794         *full_req_cnt = prm->req_cnt;
2795
2796         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2797                 prm->residual = se_cmd->residual_count;
2798                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2799                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2800                        prm->residual, se_cmd->tag,
2801                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2802                        cmd->bufflen, prm->rq_result);
2803                 prm->rq_result |= SS_RESIDUAL_UNDER;
2804         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2805                 prm->residual = se_cmd->residual_count;
2806                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2807                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2808                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2809                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2810                 prm->rq_result |= SS_RESIDUAL_OVER;
2811         }
2812
2813         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2814                 /*
2815                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2816                  * ignored in *xmit_response() below
2817                  */
2818                 if (qlt_has_data(cmd)) {
2819                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2820                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2821                             (prm->rq_result != 0))) {
2822                                 prm->add_status_pkt = 1;
2823                                 (*full_req_cnt)++;
2824                         }
2825                 }
2826         }
2827
2828         return 0;
2829 }
2830
2831 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2832     int sending_sense)
2833 {
2834         if (cmd->qpair->enable_class_2)
2835                 return 0;
2836
2837         if (sending_sense)
2838                 return cmd->conf_compl_supported;
2839         else
2840                 return cmd->qpair->enable_explicit_conf &&
2841                     cmd->conf_compl_supported;
2842 }
2843
2844 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2845         struct qla_tgt_prm *prm)
2846 {
2847         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2848             (uint32_t)sizeof(ctio->u.status1.sense_data));
2849         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2850         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2851                 ctio->u.status0.flags |= cpu_to_le16(
2852                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2853                     CTIO7_FLAGS_CONFORM_REQ);
2854         }
2855         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2856         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2857         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2858                 int i;
2859
2860                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2861                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2862                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2863                                     "Skipping EXPLICIT_CONFORM and "
2864                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2865                                     "non GOOD status\n");
2866                                 goto skip_explict_conf;
2867                         }
2868                         ctio->u.status1.flags |= cpu_to_le16(
2869                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2870                             CTIO7_FLAGS_CONFORM_REQ);
2871                 }
2872 skip_explict_conf:
2873                 ctio->u.status1.flags &=
2874                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2875                 ctio->u.status1.flags |=
2876                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2877                 ctio->u.status1.scsi_status |=
2878                     cpu_to_le16(SS_SENSE_LEN_VALID);
2879                 ctio->u.status1.sense_length =
2880                     cpu_to_le16(prm->sense_buffer_len);
2881                 for (i = 0; i < prm->sense_buffer_len/4; i++) {
2882                         uint32_t v;
2883
2884                         v = get_unaligned_be32(
2885                                         &((uint32_t *)prm->sense_buffer)[i]);
2886                         put_unaligned_le32(v,
2887                                 &((uint32_t *)ctio->u.status1.sense_data)[i]);
2888                 }
2889                 qlt_print_dif_err(prm);
2890
2891         } else {
2892                 ctio->u.status1.flags &=
2893                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2894                 ctio->u.status1.flags |=
2895                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2896                 ctio->u.status1.sense_length = 0;
2897                 memset(ctio->u.status1.sense_data, 0,
2898                     sizeof(ctio->u.status1.sense_data));
2899         }
2900
2901         /* Sense with len > 24, is it possible ??? */
2902 }
2903
2904 static inline int
2905 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2906 {
2907         switch (se_cmd->prot_op) {
2908         case TARGET_PROT_DOUT_INSERT:
2909         case TARGET_PROT_DIN_STRIP:
2910                 if (ql2xenablehba_err_chk >= 1)
2911                         return 1;
2912                 break;
2913         case TARGET_PROT_DOUT_PASS:
2914         case TARGET_PROT_DIN_PASS:
2915                 if (ql2xenablehba_err_chk >= 2)
2916                         return 1;
2917                 break;
2918         case TARGET_PROT_DIN_INSERT:
2919         case TARGET_PROT_DOUT_STRIP:
2920                 return 1;
2921         default:
2922                 break;
2923         }
2924         return 0;
2925 }
2926
2927 static inline int
2928 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2929 {
2930         switch (se_cmd->prot_op) {
2931         case TARGET_PROT_DIN_INSERT:
2932         case TARGET_PROT_DOUT_INSERT:
2933         case TARGET_PROT_DIN_STRIP:
2934         case TARGET_PROT_DOUT_STRIP:
2935         case TARGET_PROT_DIN_PASS:
2936         case TARGET_PROT_DOUT_PASS:
2937             return 1;
2938         default:
2939             return 0;
2940         }
2941         return 0;
2942 }
2943
2944 /*
2945  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2946  */
2947 static void
2948 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2949     uint16_t *pfw_prot_opts)
2950 {
2951         struct se_cmd *se_cmd = &cmd->se_cmd;
2952         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2953         scsi_qla_host_t *vha = cmd->tgt->vha;
2954         struct qla_hw_data *ha = vha->hw;
2955         uint32_t t32 = 0;
2956
2957         /*
2958          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2959          * have been immplemented by TCM, before AppTag is avail.
2960          * Look for modesense_handlers[]
2961          */
2962         ctx->app_tag = 0;
2963         ctx->app_tag_mask[0] = 0x0;
2964         ctx->app_tag_mask[1] = 0x0;
2965
2966         if (IS_PI_UNINIT_CAPABLE(ha)) {
2967                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2968                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2969                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2970                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2971                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2972         }
2973
2974         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2975
2976         switch (se_cmd->prot_type) {
2977         case TARGET_DIF_TYPE0_PROT:
2978                 /*
2979                  * No check for ql2xenablehba_err_chk, as it
2980                  * would be an I/O error if hba tag generation
2981                  * is not done.
2982                  */
2983                 ctx->ref_tag = cpu_to_le32(lba);
2984                 /* enable ALL bytes of the ref tag */
2985                 ctx->ref_tag_mask[0] = 0xff;
2986                 ctx->ref_tag_mask[1] = 0xff;
2987                 ctx->ref_tag_mask[2] = 0xff;
2988                 ctx->ref_tag_mask[3] = 0xff;
2989                 break;
2990         case TARGET_DIF_TYPE1_PROT:
2991             /*
2992              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2993              * REF tag, and 16 bit app tag.
2994              */
2995             ctx->ref_tag = cpu_to_le32(lba);
2996             if (!qla_tgt_ref_mask_check(se_cmd) ||
2997                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2998                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2999                     break;
3000             }
3001             /* enable ALL bytes of the ref tag */
3002             ctx->ref_tag_mask[0] = 0xff;
3003             ctx->ref_tag_mask[1] = 0xff;
3004             ctx->ref_tag_mask[2] = 0xff;
3005             ctx->ref_tag_mask[3] = 0xff;
3006             break;
3007         case TARGET_DIF_TYPE2_PROT:
3008             /*
3009              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
3010              * tag has to match LBA in CDB + N
3011              */
3012             ctx->ref_tag = cpu_to_le32(lba);
3013             if (!qla_tgt_ref_mask_check(se_cmd) ||
3014                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3015                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3016                     break;
3017             }
3018             /* enable ALL bytes of the ref tag */
3019             ctx->ref_tag_mask[0] = 0xff;
3020             ctx->ref_tag_mask[1] = 0xff;
3021             ctx->ref_tag_mask[2] = 0xff;
3022             ctx->ref_tag_mask[3] = 0xff;
3023             break;
3024         case TARGET_DIF_TYPE3_PROT:
3025             /* For TYPE 3 protection: 16 bit GUARD only */
3026             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3027             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
3028                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
3029             break;
3030         }
3031 }
3032
3033 static inline int
3034 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
3035 {
3036         struct dsd64            *cur_dsd;
3037         uint32_t                transfer_length = 0;
3038         uint32_t                data_bytes;
3039         uint32_t                dif_bytes;
3040         uint8_t                 bundling = 1;
3041         struct crc_context      *crc_ctx_pkt = NULL;
3042         struct qla_hw_data      *ha;
3043         struct ctio_crc2_to_fw  *pkt;
3044         dma_addr_t              crc_ctx_dma;
3045         uint16_t                fw_prot_opts = 0;
3046         struct qla_tgt_cmd      *cmd = prm->cmd;
3047         struct se_cmd           *se_cmd = &cmd->se_cmd;
3048         uint32_t h;
3049         struct atio_from_isp *atio = &prm->cmd->atio;
3050         struct qla_tc_param     tc;
3051         uint16_t t16;
3052         scsi_qla_host_t *vha = cmd->vha;
3053
3054         ha = vha->hw;
3055
3056         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3057         prm->pkt = pkt;
3058         memset(pkt, 0, sizeof(*pkt));
3059
3060         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3061                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3062                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3063                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3064
3065         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3066             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3067                 bundling = 0;
3068
3069         /* Compute dif len and adjust data len to incude protection */
3070         data_bytes = cmd->bufflen;
3071         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3072
3073         switch (se_cmd->prot_op) {
3074         case TARGET_PROT_DIN_INSERT:
3075         case TARGET_PROT_DOUT_STRIP:
3076                 transfer_length = data_bytes;
3077                 if (cmd->prot_sg_cnt)
3078                         data_bytes += dif_bytes;
3079                 break;
3080         case TARGET_PROT_DIN_STRIP:
3081         case TARGET_PROT_DOUT_INSERT:
3082         case TARGET_PROT_DIN_PASS:
3083         case TARGET_PROT_DOUT_PASS:
3084                 transfer_length = data_bytes + dif_bytes;
3085                 break;
3086         default:
3087                 BUG();
3088                 break;
3089         }
3090
3091         if (!qlt_hba_err_chk_enabled(se_cmd))
3092                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3093         /* HBA error checking enabled */
3094         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3095                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3096                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3097                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3098                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3099                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3100         }
3101
3102         switch (se_cmd->prot_op) {
3103         case TARGET_PROT_DIN_INSERT:
3104         case TARGET_PROT_DOUT_INSERT:
3105                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3106                 break;
3107         case TARGET_PROT_DIN_STRIP:
3108         case TARGET_PROT_DOUT_STRIP:
3109                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3110                 break;
3111         case TARGET_PROT_DIN_PASS:
3112         case TARGET_PROT_DOUT_PASS:
3113                 fw_prot_opts |= PO_MODE_DIF_PASS;
3114                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3115                 break;
3116         default:/* Normal Request */
3117                 fw_prot_opts |= PO_MODE_DIF_PASS;
3118                 break;
3119         }
3120
3121         /* ---- PKT ---- */
3122         /* Update entry type to indicate Command Type CRC_2 IOCB */
3123         pkt->entry_type  = CTIO_CRC2;
3124         pkt->entry_count = 1;
3125         pkt->vp_index = cmd->vp_idx;
3126
3127         h = qlt_make_handle(qpair);
3128         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3129                 /*
3130                  * CTIO type 7 from the firmware doesn't provide a way to
3131                  * know the initiator's LOOP ID, hence we can't find
3132                  * the session and, so, the command.
3133                  */
3134                 return -EAGAIN;
3135         } else
3136                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3137
3138         pkt->handle  = make_handle(qpair->req->id, h);
3139         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3140         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3141         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3142         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3143         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3144
3145         /* silence compile warning */
3146         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3147         pkt->ox_id  = cpu_to_le16(t16);
3148
3149         t16 = (atio->u.isp24.attr << 9);
3150         pkt->flags |= cpu_to_le16(t16);
3151         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3152
3153         /* Set transfer direction */
3154         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3155                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3156         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3157                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3158
3159         pkt->dseg_count = cpu_to_le16(prm->tot_dsds);
3160         /* Fibre channel byte count */
3161         pkt->transfer_length = cpu_to_le32(transfer_length);
3162
3163         /* ----- CRC context -------- */
3164
3165         /* Allocate CRC context from global pool */
3166         crc_ctx_pkt = cmd->ctx =
3167             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3168
3169         if (!crc_ctx_pkt)
3170                 goto crc_queuing_error;
3171
3172         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3173         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3174
3175         /* Set handle */
3176         crc_ctx_pkt->handle = pkt->handle;
3177
3178         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3179
3180         put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3181         pkt->crc_context_len = cpu_to_le16(CRC_CONTEXT_LEN_FW);
3182
3183         if (!bundling) {
3184                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
3185         } else {
3186                 /*
3187                  * Configure Bundling if we need to fetch interlaving
3188                  * protection PCI accesses
3189                  */
3190                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3191                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3192                 crc_ctx_pkt->u.bundling.dseg_count =
3193                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3194                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
3195         }
3196
3197         /* Finish the common fields of CRC pkt */
3198         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3199         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3200         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3201         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3202
3203         memset((uint8_t *)&tc, 0 , sizeof(tc));
3204         tc.vha = vha;
3205         tc.blk_sz = cmd->blk_sz;
3206         tc.bufflen = cmd->bufflen;
3207         tc.sg = cmd->sg;
3208         tc.prot_sg = cmd->prot_sg;
3209         tc.ctx = crc_ctx_pkt;
3210         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3211
3212         /* Walks data segments */
3213         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3214
3215         if (!bundling && prm->prot_seg_cnt) {
3216                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3217                         prm->tot_dsds, &tc))
3218                         goto crc_queuing_error;
3219         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3220                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3221                 goto crc_queuing_error;
3222
3223         if (bundling && prm->prot_seg_cnt) {
3224                 /* Walks dif segments */
3225                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3226
3227                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3228                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3229                         prm->prot_seg_cnt, cmd))
3230                         goto crc_queuing_error;
3231         }
3232         return QLA_SUCCESS;
3233
3234 crc_queuing_error:
3235         /* Cleanup will be performed by the caller */
3236         qpair->req->outstanding_cmds[h] = NULL;
3237
3238         return QLA_FUNCTION_FAILED;
3239 }
3240
3241 /*
3242  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3243  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3244  */
3245 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3246         uint8_t scsi_status)
3247 {
3248         struct scsi_qla_host *vha = cmd->vha;
3249         struct qla_qpair *qpair = cmd->qpair;
3250         struct ctio7_to_24xx *pkt;
3251         struct qla_tgt_prm prm;
3252         uint32_t full_req_cnt = 0;
3253         unsigned long flags = 0;
3254         int res;
3255
3256         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3257             (cmd->sess && cmd->sess->deleted)) {
3258                 cmd->state = QLA_TGT_STATE_PROCESSED;
3259                 return 0;
3260         }
3261
3262         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3263             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3264             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3265             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3266             &cmd->se_cmd, qpair->id);
3267
3268         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3269             &full_req_cnt);
3270         if (unlikely(res != 0)) {
3271                 return res;
3272         }
3273
3274         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3275
3276         if (xmit_type == QLA_TGT_XMIT_STATUS)
3277                 qpair->tgt_counters.core_qla_snd_status++;
3278         else
3279                 qpair->tgt_counters.core_qla_que_buf++;
3280
3281         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3282                 /*
3283                  * Either the port is not online or this request was from
3284                  * previous life, just abort the processing.
3285                  */
3286                 cmd->state = QLA_TGT_STATE_PROCESSED;
3287                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3288                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3289                         vha->flags.online, qla2x00_reset_active(vha),
3290                         cmd->reset_count, qpair->chip_reset);
3291                 res = 0;
3292                 goto out_unmap_unlock;
3293         }
3294
3295         /* Does F/W have an IOCBs for this request */
3296         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3297         if (unlikely(res))
3298                 goto out_unmap_unlock;
3299
3300         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3301                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3302         else
3303                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3304         if (unlikely(res != 0)) {
3305                 qpair->req->cnt += full_req_cnt;
3306                 goto out_unmap_unlock;
3307         }
3308
3309         pkt = (struct ctio7_to_24xx *)prm.pkt;
3310
3311         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3312                 pkt->u.status0.flags |=
3313                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3314                         CTIO7_FLAGS_STATUS_MODE_0);
3315
3316                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3317                         qlt_load_data_segments(&prm);
3318
3319                 if (prm.add_status_pkt == 0) {
3320                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3321                                 pkt->u.status0.scsi_status =
3322                                     cpu_to_le16(prm.rq_result);
3323                                 if (!cmd->edif)
3324                                         pkt->u.status0.residual =
3325                                                 cpu_to_le32(prm.residual);
3326
3327                                 pkt->u.status0.flags |= cpu_to_le16(
3328                                     CTIO7_FLAGS_SEND_STATUS);
3329                                 if (qlt_need_explicit_conf(cmd, 0)) {
3330                                         pkt->u.status0.flags |=
3331                                             cpu_to_le16(
3332                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3333                                                 CTIO7_FLAGS_CONFORM_REQ);
3334                                 }
3335                         }
3336
3337                 } else {
3338                         /*
3339                          * We have already made sure that there is sufficient
3340                          * amount of request entries to not drop HW lock in
3341                          * req_pkt().
3342                          */
3343                         struct ctio7_to_24xx *ctio =
3344                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3345                                     qpair->req);
3346
3347                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3348                             "Building additional status packet 0x%p.\n",
3349                             ctio);
3350
3351                         /*
3352                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3353                          * ctio7_to_24xx
3354                          */
3355                         memcpy(ctio, pkt, sizeof(*ctio));
3356                         /* reset back to CTIO7 */
3357                         ctio->entry_count = 1;
3358                         ctio->entry_type = CTIO_TYPE7;
3359                         ctio->dseg_count = 0;
3360                         ctio->u.status1.flags &= ~cpu_to_le16(
3361                             CTIO7_FLAGS_DATA_IN);
3362
3363                         /* Real finish is ctio_m1's finish */
3364                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3365                         pkt->u.status0.flags |= cpu_to_le16(
3366                             CTIO7_FLAGS_DONT_RET_CTIO);
3367
3368                         /* qlt_24xx_init_ctio_to_isp will correct
3369                          * all neccessary fields that's part of CTIO7.
3370                          * There should be no residual of CTIO-CRC2 data.
3371                          */
3372                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3373                             &prm);
3374                 }
3375         } else
3376                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3377
3378
3379         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3380         cmd->cmd_sent_to_fw = 1;
3381         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3382
3383         /* Memory Barrier */
3384         wmb();
3385         if (qpair->reqq_start_iocbs)
3386                 qpair->reqq_start_iocbs(qpair);
3387         else
3388                 qla2x00_start_iocbs(vha, qpair->req);
3389         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3390
3391         return 0;
3392
3393 out_unmap_unlock:
3394         qlt_unmap_sg(vha, cmd);
3395         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3396
3397         return res;
3398 }
3399 EXPORT_SYMBOL(qlt_xmit_response);
3400
3401 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3402 {
3403         struct ctio7_to_24xx *pkt;
3404         struct scsi_qla_host *vha = cmd->vha;
3405         struct qla_tgt *tgt = cmd->tgt;
3406         struct qla_tgt_prm prm;
3407         unsigned long flags = 0;
3408         int res = 0;
3409         struct qla_qpair *qpair = cmd->qpair;
3410
3411         memset(&prm, 0, sizeof(prm));
3412         prm.cmd = cmd;
3413         prm.tgt = tgt;
3414         prm.sg = NULL;
3415         prm.req_cnt = 1;
3416
3417         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3418             (cmd->sess && cmd->sess->deleted)) {
3419                 /*
3420                  * Either the port is not online or this request was from
3421                  * previous life, just abort the processing.
3422                  */
3423                 cmd->aborted = 1;
3424                 cmd->write_data_transferred = 0;
3425                 cmd->state = QLA_TGT_STATE_DATA_IN;
3426                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3427                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3428                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3429                         vha->flags.online, qla2x00_reset_active(vha),
3430                         cmd->reset_count, qpair->chip_reset);
3431                 return 0;
3432         }
3433
3434         /* Calculate number of entries and segments required */
3435         if (qlt_pci_map_calc_cnt(&prm) != 0)
3436                 return -EAGAIN;
3437
3438         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3439         /* Does F/W have an IOCBs for this request */
3440         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3441         if (res != 0)
3442                 goto out_unlock_free_unmap;
3443         if (cmd->se_cmd.prot_op)
3444                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3445         else
3446                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3447
3448         if (unlikely(res != 0)) {
3449                 qpair->req->cnt += prm.req_cnt;
3450                 goto out_unlock_free_unmap;
3451         }
3452
3453         pkt = (struct ctio7_to_24xx *)prm.pkt;
3454         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3455             CTIO7_FLAGS_STATUS_MODE_0);
3456
3457         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3458                 qlt_load_data_segments(&prm);
3459
3460         cmd->state = QLA_TGT_STATE_NEED_DATA;
3461         cmd->cmd_sent_to_fw = 1;
3462         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3463
3464         /* Memory Barrier */
3465         wmb();
3466         if (qpair->reqq_start_iocbs)
3467                 qpair->reqq_start_iocbs(qpair);
3468         else
3469                 qla2x00_start_iocbs(vha, qpair->req);
3470         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3471
3472         return res;
3473
3474 out_unlock_free_unmap:
3475         qlt_unmap_sg(vha, cmd);
3476         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3477
3478         return res;
3479 }
3480 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3481
3482
3483 /*
3484  * it is assumed either hardware_lock or qpair lock is held.
3485  */
3486 static void
3487 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3488         struct ctio_crc_from_fw *sts)
3489 {
3490         uint8_t         *ap = &sts->actual_dif[0];
3491         uint8_t         *ep = &sts->expected_dif[0];
3492         uint64_t        lba = cmd->se_cmd.t_task_lba;
3493         uint8_t scsi_status, sense_key, asc, ascq;
3494         unsigned long flags;
3495         struct scsi_qla_host *vha = cmd->vha;
3496
3497         cmd->trc_flags |= TRC_DIF_ERR;
3498
3499         cmd->a_guard   = get_unaligned_be16(ap + 0);
3500         cmd->a_app_tag = get_unaligned_be16(ap + 2);
3501         cmd->a_ref_tag = get_unaligned_be32(ap + 4);
3502
3503         cmd->e_guard   = get_unaligned_be16(ep + 0);
3504         cmd->e_app_tag = get_unaligned_be16(ep + 2);
3505         cmd->e_ref_tag = get_unaligned_be32(ep + 4);
3506
3507         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3508             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3509
3510         scsi_status = sense_key = asc = ascq = 0;
3511
3512         /* check appl tag */
3513         if (cmd->e_app_tag != cmd->a_app_tag) {
3514                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3515                     "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3516                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3517                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3518                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3519                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3520
3521                 cmd->dif_err_code = DIF_ERR_APP;
3522                 scsi_status = SAM_STAT_CHECK_CONDITION;
3523                 sense_key = ABORTED_COMMAND;
3524                 asc = 0x10;
3525                 ascq = 0x2;
3526         }
3527
3528         /* check ref tag */
3529         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3530                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3531                     "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard[%x|%x] cmd=%p ox_id[%04x] ",
3532                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3533                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3534                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3535                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3536
3537                 cmd->dif_err_code = DIF_ERR_REF;
3538                 scsi_status = SAM_STAT_CHECK_CONDITION;
3539                 sense_key = ABORTED_COMMAND;
3540                 asc = 0x10;
3541                 ascq = 0x3;
3542                 goto out;
3543         }
3544
3545         /* check guard */
3546         if (cmd->e_guard != cmd->a_guard) {
3547                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3548                     "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3549                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3550                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3551                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3552                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3553
3554                 cmd->dif_err_code = DIF_ERR_GRD;
3555                 scsi_status = SAM_STAT_CHECK_CONDITION;
3556                 sense_key = ABORTED_COMMAND;
3557                 asc = 0x10;
3558                 ascq = 0x1;
3559         }
3560 out:
3561         switch (cmd->state) {
3562         case QLA_TGT_STATE_NEED_DATA:
3563                 /* handle_data will load DIF error code  */
3564                 cmd->state = QLA_TGT_STATE_DATA_IN;
3565                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3566                 break;
3567         default:
3568                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3569                 if (cmd->aborted) {
3570                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3571                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3572                         break;
3573                 }
3574                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3575
3576                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3577                     ascq);
3578                 /* assume scsi status gets out on the wire.
3579                  * Will not wait for completion.
3580                  */
3581                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3582                 break;
3583         }
3584 }
3585
3586 /* If hardware_lock held on entry, might drop it, then reaquire */
3587 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3588 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3589         struct imm_ntfy_from_isp *ntfy)
3590 {
3591         struct nack_to_isp *nack;
3592         struct qla_hw_data *ha = vha->hw;
3593         request_t *pkt;
3594         int ret = 0;
3595
3596         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3597             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3598
3599         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3600         if (pkt == NULL) {
3601                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3602                     "qla_target(%d): %s failed: unable to allocate "
3603                     "request packet\n", vha->vp_idx, __func__);
3604                 return -ENOMEM;
3605         }
3606
3607         pkt->entry_type = NOTIFY_ACK_TYPE;
3608         pkt->entry_count = 1;
3609         pkt->handle = QLA_TGT_SKIP_HANDLE;
3610
3611         nack = (struct nack_to_isp *)pkt;
3612         nack->ox_id = ntfy->ox_id;
3613
3614         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3615         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3616                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3617                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
3618         }
3619
3620         /* terminate */
3621         nack->u.isp24.flags |=
3622                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3623
3624         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3625         nack->u.isp24.status = ntfy->u.isp24.status;
3626         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3627         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3628         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3629         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3630         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3631         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3632
3633         qla2x00_start_iocbs(vha, vha->req);
3634         return ret;
3635 }
3636
3637 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3638         struct imm_ntfy_from_isp *imm, int ha_locked)
3639 {
3640         int rc;
3641
3642         WARN_ON_ONCE(!ha_locked);
3643         rc = __qlt_send_term_imm_notif(vha, imm);
3644         pr_debug("rc = %d\n", rc);
3645 }
3646
3647 /*
3648  * If hardware_lock held on entry, might drop it, then reaquire
3649  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3650  */
3651 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3652         struct qla_tgt_cmd *cmd,
3653         struct atio_from_isp *atio)
3654 {
3655         struct scsi_qla_host *vha = qpair->vha;
3656         struct ctio7_to_24xx *ctio24;
3657         struct qla_hw_data *ha = vha->hw;
3658         request_t *pkt;
3659         int ret = 0;
3660         uint16_t temp;
3661
3662         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3663
3664         if (cmd)
3665                 vha = cmd->vha;
3666
3667         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3668         if (pkt == NULL) {
3669                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3670                     "qla_target(%d): %s failed: unable to allocate "
3671                     "request packet\n", vha->vp_idx, __func__);
3672                 return -ENOMEM;
3673         }
3674
3675         if (cmd != NULL) {
3676                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3677                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3678                             "qla_target(%d): Terminating cmd %p with "
3679                             "incorrect state %d\n", vha->vp_idx, cmd,
3680                             cmd->state);
3681                 } else
3682                         ret = 1;
3683         }
3684
3685         qpair->tgt_counters.num_term_xchg_sent++;
3686         pkt->entry_count = 1;
3687         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3688
3689         ctio24 = (struct ctio7_to_24xx *)pkt;
3690         ctio24->entry_type = CTIO_TYPE7;
3691         ctio24->nport_handle = cpu_to_le16(CTIO7_NHANDLE_UNRECOGNIZED);
3692         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3693         ctio24->vp_index = vha->vp_idx;
3694         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3695         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3696         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3697                 CTIO7_FLAGS_TERMINATE;
3698         ctio24->u.status1.flags = cpu_to_le16(temp);
3699         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3700         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3701
3702         /* Memory Barrier */
3703         wmb();
3704         if (qpair->reqq_start_iocbs)
3705                 qpair->reqq_start_iocbs(qpair);
3706         else
3707                 qla2x00_start_iocbs(vha, qpair->req);
3708         return ret;
3709 }
3710
3711 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3712         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3713         int ul_abort)
3714 {
3715         struct scsi_qla_host *vha;
3716         unsigned long flags = 0;
3717         int rc;
3718
3719         /* why use different vha? NPIV */
3720         if (cmd)
3721                 vha = cmd->vha;
3722         else
3723                 vha = qpair->vha;
3724
3725         if (ha_locked) {
3726                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3727                 if (rc == -ENOMEM)
3728                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3729                 goto done;
3730         }
3731         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3732         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3733         if (rc == -ENOMEM)
3734                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3735
3736 done:
3737         if (cmd && !ul_abort && !cmd->aborted) {
3738                 if (cmd->sg_mapped)
3739                         qlt_unmap_sg(vha, cmd);
3740                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3741         }
3742
3743         if (!ha_locked)
3744                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3745
3746         return;
3747 }
3748
3749 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3750 {
3751         struct list_head free_list;
3752         struct qla_tgt_cmd *cmd, *tcmd;
3753
3754         vha->hw->tgt.leak_exchg_thresh_hold =
3755             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3756
3757         cmd = tcmd = NULL;
3758         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3759                 INIT_LIST_HEAD(&free_list);
3760                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3761
3762                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3763                         list_del(&cmd->cmd_list);
3764                         /* This cmd was never sent to TCM.  There is no need
3765                          * to schedule free or call free_cmd
3766                          */
3767                         qlt_free_cmd(cmd);
3768                         vha->hw->tgt.num_qfull_cmds_alloc--;
3769                 }
3770         }
3771         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3772 }
3773
3774 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3775 {
3776         uint32_t total_leaked;
3777
3778         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3779
3780         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3781             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3782
3783                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3784                     "Chip reset due to exchange starvation: %d/%d.\n",
3785                     total_leaked, vha->hw->cur_fw_xcb_count);
3786
3787                 if (IS_P3P_TYPE(vha->hw))
3788                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3789                 else
3790                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3791                 qla2xxx_wake_dpc(vha);
3792         }
3793
3794 }
3795
3796 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3797 {
3798         struct qla_tgt *tgt = cmd->tgt;
3799         struct scsi_qla_host *vha = tgt->vha;
3800         struct se_cmd *se_cmd = &cmd->se_cmd;
3801         unsigned long flags;
3802
3803         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3804             "qla_target(%d): terminating exchange for aborted cmd=%p "
3805             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3806             se_cmd->tag);
3807
3808         spin_lock_irqsave(&cmd->cmd_lock, flags);
3809         if (cmd->aborted) {
3810                 if (cmd->sg_mapped)
3811                         qlt_unmap_sg(vha, cmd);
3812
3813                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3814                 /*
3815                  * It's normal to see 2 calls in this path:
3816                  *  1) XFER Rdy completion + CMD_T_ABORT
3817                  *  2) TCM TMR - drain_state_list
3818                  */
3819                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3820                     "multiple abort. %p transport_state %x, t_state %x, "
3821                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3822                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3823                 return -EIO;
3824         }
3825         cmd->aborted = 1;
3826         cmd->trc_flags |= TRC_ABORT;
3827         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3828
3829         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3830         return 0;
3831 }
3832 EXPORT_SYMBOL(qlt_abort_cmd);
3833
3834 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3835 {
3836         struct fc_port *sess = cmd->sess;
3837
3838         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3839             "%s: se_cmd[%p] ox_id %04x\n",
3840             __func__, &cmd->se_cmd,
3841             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3842
3843         BUG_ON(cmd->cmd_in_wq);
3844
3845         if (!cmd->q_full)
3846                 qlt_decr_num_pend_cmds(cmd->vha);
3847
3848         BUG_ON(cmd->sg_mapped);
3849         cmd->jiffies_at_free = get_jiffies_64();
3850
3851         if (!sess || !sess->se_sess) {
3852                 WARN_ON(1);
3853                 return;
3854         }
3855         cmd->jiffies_at_free = get_jiffies_64();
3856         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
3857 }
3858 EXPORT_SYMBOL(qlt_free_cmd);
3859
3860 /*
3861  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3862  */
3863 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3864         struct qla_tgt_cmd *cmd, uint32_t status)
3865 {
3866         int term = 0;
3867         struct scsi_qla_host *vha = qpair->vha;
3868
3869         if (cmd->se_cmd.prot_op)
3870                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3871                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3872                     "se_cmd=%p tag[%x] op %#x/%s",
3873                      cmd->lba, cmd->lba,
3874                      cmd->num_blks, &cmd->se_cmd,
3875                      cmd->atio.u.isp24.exchange_addr,
3876                      cmd->se_cmd.prot_op,
3877                      prot_op_str(cmd->se_cmd.prot_op));
3878
3879         if (ctio != NULL) {
3880                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3881
3882                 term = !(c->flags &
3883                     cpu_to_le16(OF_TERM_EXCH));
3884         } else
3885                 term = 1;
3886
3887         if (term)
3888                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3889
3890         return term;
3891 }
3892
3893
3894 /* ha->hardware_lock supposed to be held on entry */
3895 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3896         struct rsp_que *rsp, uint32_t handle, void *ctio)
3897 {
3898         void *cmd = NULL;
3899         struct req_que *req;
3900         int qid = GET_QID(handle);
3901         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3902
3903         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3904                 return NULL;
3905
3906         if (qid == rsp->req->id) {
3907                 req = rsp->req;
3908         } else if (vha->hw->req_q_map[qid]) {
3909                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3910                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3911                     vha->vp_idx, rsp->id, handle);
3912                 req = vha->hw->req_q_map[qid];
3913         } else {
3914                 return NULL;
3915         }
3916
3917         h &= QLA_CMD_HANDLE_MASK;
3918
3919         if (h != QLA_TGT_NULL_HANDLE) {
3920                 if (unlikely(h >= req->num_outstanding_cmds)) {
3921                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3922                             "qla_target(%d): Wrong handle %x received\n",
3923                             vha->vp_idx, handle);
3924                         return NULL;
3925                 }
3926
3927                 cmd = req->outstanding_cmds[h];
3928                 if (unlikely(cmd == NULL)) {
3929                         ql_dbg(ql_dbg_async, vha, 0xe053,
3930                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3931                                 vha->vp_idx, handle, req->id, rsp->id);
3932                         return NULL;
3933                 }
3934                 req->outstanding_cmds[h] = NULL;
3935         } else if (ctio != NULL) {
3936                 /* We can't get loop ID from CTIO7 */
3937                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3938                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3939                     "support NULL handles\n", vha->vp_idx);
3940                 return NULL;
3941         }
3942
3943         return cmd;
3944 }
3945
3946 /*
3947  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3948  */
3949 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3950     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3951 {
3952         struct qla_hw_data *ha = vha->hw;
3953         struct se_cmd *se_cmd;
3954         struct qla_tgt_cmd *cmd;
3955         struct qla_qpair *qpair = rsp->qpair;
3956
3957         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3958                 /* That could happen only in case of an error/reset/abort */
3959                 if (status != CTIO_SUCCESS) {
3960                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3961                             "Intermediate CTIO received"
3962                             " (status %x)\n", status);
3963                 }
3964                 return;
3965         }
3966
3967         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3968         if (cmd == NULL)
3969                 return;
3970
3971         if ((le16_to_cpu(((struct ctio7_from_24xx *)ctio)->flags) & CTIO7_FLAGS_DATA_OUT) &&
3972             cmd->sess) {
3973                 qlt_chk_edif_rx_sa_delete_pending(vha, cmd->sess,
3974                     (struct ctio7_from_24xx *)ctio);
3975         }
3976
3977         se_cmd = &cmd->se_cmd;
3978         cmd->cmd_sent_to_fw = 0;
3979
3980         qlt_unmap_sg(vha, cmd);
3981
3982         if (unlikely(status != CTIO_SUCCESS)) {
3983                 switch (status & 0xFFFF) {
3984                 case CTIO_INVALID_RX_ID:
3985                         if (printk_ratelimit())
3986                                 dev_info(&vha->hw->pdev->dev,
3987                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
3988                                     vha->vp_idx, cmd->atio.u.isp24.attr,
3989                                     ((cmd->ctio_flags >> 9) & 0xf),
3990                                     cmd->ctio_flags);
3991
3992                         break;
3993                 case CTIO_LIP_RESET:
3994                 case CTIO_TARGET_RESET:
3995                 case CTIO_ABORTED:
3996                         /* driver request abort via Terminate exchange */
3997                 case CTIO_TIMEOUT:
3998                         /* They are OK */
3999                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
4000                             "qla_target(%d): CTIO with "
4001                             "status %#x received, state %x, se_cmd %p, "
4002                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
4003                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
4004                             status, cmd->state, se_cmd);
4005                         break;
4006
4007                 case CTIO_PORT_LOGGED_OUT:
4008                 case CTIO_PORT_UNAVAILABLE:
4009                 {
4010                         int logged_out =
4011                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
4012
4013                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
4014                             "qla_target(%d): CTIO with %s status %x "
4015                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
4016                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
4017                             status, cmd->state, se_cmd);
4018
4019                         if (logged_out && cmd->sess) {
4020                                 /*
4021                                  * Session is already logged out, but we need
4022                                  * to notify initiator, who's not aware of this
4023                                  */
4024                                 cmd->sess->send_els_logo = 1;
4025                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
4026                                     "%s %d %8phC post del sess\n",
4027                                     __func__, __LINE__, cmd->sess->port_name);
4028
4029                                 qlt_schedule_sess_for_deletion(cmd->sess);
4030                         }
4031                         break;
4032                 }
4033                 case CTIO_DIF_ERROR: {
4034                         struct ctio_crc_from_fw *crc =
4035                                 (struct ctio_crc_from_fw *)ctio;
4036                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
4037                             "qla_target(%d): CTIO with DIF_ERROR status %x "
4038                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
4039                             "expect_dif[0x%llx]\n",
4040                             vha->vp_idx, status, cmd->state, se_cmd,
4041                             *((u64 *)&crc->actual_dif[0]),
4042                             *((u64 *)&crc->expected_dif[0]));
4043
4044                         qlt_handle_dif_error(qpair, cmd, ctio);
4045                         return;
4046                 }
4047
4048                 case CTIO_FAST_AUTH_ERR:
4049                 case CTIO_FAST_INCOMP_PAD_LEN:
4050                 case CTIO_FAST_INVALID_REQ:
4051                 case CTIO_FAST_SPI_ERR:
4052                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4053                             "qla_target(%d): CTIO with EDIF error status 0x%x received (state %x, se_cmd %p\n",
4054                             vha->vp_idx, status, cmd->state, se_cmd);
4055                         break;
4056
4057                 default:
4058                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4059                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4060                             vha->vp_idx, status, cmd->state, se_cmd);
4061                         break;
4062                 }
4063
4064
4065                 /* "cmd->aborted" means
4066                  * cmd is already aborted/terminated, we don't
4067                  * need to terminate again.  The exchange is already
4068                  * cleaned up/freed at FW level.  Just cleanup at driver
4069                  * level.
4070                  */
4071                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4072                     (!cmd->aborted)) {
4073                         cmd->trc_flags |= TRC_CTIO_ERR;
4074                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4075                                 return;
4076                 }
4077         }
4078
4079         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4080                 cmd->trc_flags |= TRC_CTIO_DONE;
4081         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4082                 cmd->state = QLA_TGT_STATE_DATA_IN;
4083
4084                 if (status == CTIO_SUCCESS)
4085                         cmd->write_data_transferred = 1;
4086
4087                 ha->tgt.tgt_ops->handle_data(cmd);
4088                 return;
4089         } else if (cmd->aborted) {
4090                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4091                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4092                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4093         } else {
4094                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4095                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4096                     "qla_target(%d): A command in state (%d) should "
4097                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4098         }
4099
4100         if (unlikely(status != CTIO_SUCCESS) &&
4101                 !cmd->aborted) {
4102                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4103                 dump_stack();
4104         }
4105
4106         ha->tgt.tgt_ops->free_cmd(cmd);
4107 }
4108
4109 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4110         uint8_t task_codes)
4111 {
4112         int fcp_task_attr;
4113
4114         switch (task_codes) {
4115         case ATIO_SIMPLE_QUEUE:
4116                 fcp_task_attr = TCM_SIMPLE_TAG;
4117                 break;
4118         case ATIO_HEAD_OF_QUEUE:
4119                 fcp_task_attr = TCM_HEAD_TAG;
4120                 break;
4121         case ATIO_ORDERED_QUEUE:
4122                 fcp_task_attr = TCM_ORDERED_TAG;
4123                 break;
4124         case ATIO_ACA_QUEUE:
4125                 fcp_task_attr = TCM_ACA_TAG;
4126                 break;
4127         case ATIO_UNTAGGED:
4128                 fcp_task_attr = TCM_SIMPLE_TAG;
4129                 break;
4130         default:
4131                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4132                     "qla_target: unknown task code %x, use ORDERED instead\n",
4133                     task_codes);
4134                 fcp_task_attr = TCM_ORDERED_TAG;
4135                 break;
4136         }
4137
4138         return fcp_task_attr;
4139 }
4140
4141 /*
4142  * Process context for I/O path into tcm_qla2xxx code
4143  */
4144 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4145 {
4146         scsi_qla_host_t *vha = cmd->vha;
4147         struct qla_hw_data *ha = vha->hw;
4148         struct fc_port *sess = cmd->sess;
4149         struct atio_from_isp *atio = &cmd->atio;
4150         unsigned char *cdb;
4151         unsigned long flags;
4152         uint32_t data_length;
4153         int ret, fcp_task_attr, data_dir, bidi = 0;
4154         struct qla_qpair *qpair = cmd->qpair;
4155
4156         cmd->cmd_in_wq = 0;
4157         cmd->trc_flags |= TRC_DO_WORK;
4158
4159         if (cmd->aborted) {
4160                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4161                     "cmd with tag %u is aborted\n",
4162                     cmd->atio.u.isp24.exchange_addr);
4163                 goto out_term;
4164         }
4165
4166         spin_lock_init(&cmd->cmd_lock);
4167         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4168         cmd->se_cmd.tag = le32_to_cpu(atio->u.isp24.exchange_addr);
4169
4170         if (atio->u.isp24.fcp_cmnd.rddata &&
4171             atio->u.isp24.fcp_cmnd.wrdata) {
4172                 bidi = 1;
4173                 data_dir = DMA_TO_DEVICE;
4174         } else if (atio->u.isp24.fcp_cmnd.rddata)
4175                 data_dir = DMA_FROM_DEVICE;
4176         else if (atio->u.isp24.fcp_cmnd.wrdata)
4177                 data_dir = DMA_TO_DEVICE;
4178         else
4179                 data_dir = DMA_NONE;
4180
4181         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4182             atio->u.isp24.fcp_cmnd.task_attr);
4183         data_length = get_datalen_for_atio(atio);
4184
4185         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4186                                           fcp_task_attr, data_dir, bidi);
4187         if (ret != 0)
4188                 goto out_term;
4189         /*
4190          * Drop extra session reference from qlt_handle_cmd_for_atio().
4191          */
4192         ha->tgt.tgt_ops->put_sess(sess);
4193         return;
4194
4195 out_term:
4196         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4197         /*
4198          * cmd has not sent to target yet, so pass NULL as the second
4199          * argument to qlt_send_term_exchange() and free the memory here.
4200          */
4201         cmd->trc_flags |= TRC_DO_WORK_ERR;
4202         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4203         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4204
4205         qlt_decr_num_pend_cmds(vha);
4206         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
4207         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4208
4209         ha->tgt.tgt_ops->put_sess(sess);
4210 }
4211
4212 static void qlt_do_work(struct work_struct *work)
4213 {
4214         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4215         scsi_qla_host_t *vha = cmd->vha;
4216         unsigned long flags;
4217
4218         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4219         list_del(&cmd->cmd_list);
4220         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4221
4222         __qlt_do_work(cmd);
4223 }
4224
4225 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4226 {
4227         unsigned long flags;
4228         struct qla_hw_data *ha = vha->hw;
4229         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4230         void *node;
4231         u64 key = 0;
4232
4233         ql_log(ql_log_info, vha, 0x706c,
4234             "User update Number of Active Qpairs %d\n",
4235             ha->tgt.num_act_qpairs);
4236
4237         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4238
4239         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4240                 btree_remove64(&tgt->lun_qpair_map, key);
4241
4242         ha->base_qpair->lun_cnt = 0;
4243         for (key = 0; key < ha->max_qpairs; key++)
4244                 if (ha->queue_pair_map[key])
4245                         ha->queue_pair_map[key]->lun_cnt = 0;
4246
4247         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4248 }
4249
4250 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4251         struct qla_tgt_cmd *cmd)
4252 {
4253         struct qla_qpair *qpair, *qp;
4254         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4255         struct qla_qpair_hint *h;
4256
4257         if (vha->flags.qpairs_available) {
4258                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4259                 if (unlikely(!h)) {
4260                         /* spread lun to qpair ratio evently */
4261                         int lcnt = 0, rc;
4262                         struct scsi_qla_host *base_vha =
4263                                 pci_get_drvdata(vha->hw->pdev);
4264
4265                         qpair = vha->hw->base_qpair;
4266                         if (qpair->lun_cnt == 0) {
4267                                 qpair->lun_cnt++;
4268                                 h = qla_qpair_to_hint(tgt, qpair);
4269                                 BUG_ON(!h);
4270                                 rc = btree_insert64(&tgt->lun_qpair_map,
4271                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4272                                 if (rc) {
4273                                         qpair->lun_cnt--;
4274                                         ql_log(ql_log_info, vha, 0xd037,
4275                                             "Unable to insert lun %llx into lun_qpair_map\n",
4276                                             cmd->unpacked_lun);
4277                                 }
4278                                 goto out;
4279                         } else {
4280                                 lcnt = qpair->lun_cnt;
4281                         }
4282
4283                         h = NULL;
4284                         list_for_each_entry(qp, &base_vha->qp_list,
4285                             qp_list_elem) {
4286                                 if (qp->lun_cnt == 0) {
4287                                         qp->lun_cnt++;
4288                                         h = qla_qpair_to_hint(tgt, qp);
4289                                         BUG_ON(!h);
4290                                         rc = btree_insert64(&tgt->lun_qpair_map,
4291                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4292                                         if (rc) {
4293                                                 qp->lun_cnt--;
4294                                                 ql_log(ql_log_info, vha, 0xd038,
4295                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4296                                                         cmd->unpacked_lun);
4297                                         }
4298                                         qpair = qp;
4299                                         goto out;
4300                                 } else {
4301                                         if (qp->lun_cnt < lcnt) {
4302                                                 lcnt = qp->lun_cnt;
4303                                                 qpair = qp;
4304                                                 continue;
4305                                         }
4306                                 }
4307                         }
4308                         BUG_ON(!qpair);
4309                         qpair->lun_cnt++;
4310                         h = qla_qpair_to_hint(tgt, qpair);
4311                         BUG_ON(!h);
4312                         rc = btree_insert64(&tgt->lun_qpair_map,
4313                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4314                         if (rc) {
4315                                 qpair->lun_cnt--;
4316                                 ql_log(ql_log_info, vha, 0xd039,
4317                                    "Unable to insert lun %llx into lun_qpair_map\n",
4318                                    cmd->unpacked_lun);
4319                         }
4320                 }
4321         } else {
4322                 h = &tgt->qphints[0];
4323         }
4324 out:
4325         cmd->qpair = h->qpair;
4326         cmd->se_cmd.cpuid = h->cpuid;
4327 }
4328
4329 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4330                                        struct fc_port *sess,
4331                                        struct atio_from_isp *atio)
4332 {
4333         struct qla_tgt_cmd *cmd;
4334
4335         cmd = vha->hw->tgt.tgt_ops->get_cmd(sess);
4336         if (!cmd)
4337                 return NULL;
4338
4339         cmd->cmd_type = TYPE_TGT_CMD;
4340         memcpy(&cmd->atio, atio, sizeof(*atio));
4341         INIT_LIST_HEAD(&cmd->sess_cmd_list);
4342         cmd->state = QLA_TGT_STATE_NEW;
4343         cmd->tgt = vha->vha_tgt.qla_tgt;
4344         qlt_incr_num_pend_cmds(vha);
4345         cmd->vha = vha;
4346         cmd->sess = sess;
4347         cmd->loop_id = sess->loop_id;
4348         cmd->conf_compl_supported = sess->conf_compl_supported;
4349
4350         cmd->trc_flags = 0;
4351         cmd->jiffies_at_alloc = get_jiffies_64();
4352
4353         cmd->unpacked_lun = scsilun_to_int(
4354             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4355         qlt_assign_qpair(vha, cmd);
4356         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4357         cmd->vp_idx = vha->vp_idx;
4358         cmd->edif = sess->edif.enable;
4359
4360         return cmd;
4361 }
4362
4363 /* ha->hardware_lock supposed to be held on entry */
4364 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4365         struct atio_from_isp *atio)
4366 {
4367         struct qla_hw_data *ha = vha->hw;
4368         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4369         struct fc_port *sess;
4370         struct qla_tgt_cmd *cmd;
4371         unsigned long flags;
4372         port_id_t id;
4373
4374         if (unlikely(tgt->tgt_stop)) {
4375                 ql_dbg(ql_dbg_io, vha, 0x3061,
4376                     "New command while device %p is shutting down\n", tgt);
4377                 return -ENODEV;
4378         }
4379
4380         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4381         if (IS_SW_RESV_ADDR(id))
4382                 return -EBUSY;
4383
4384         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4385         if (unlikely(!sess))
4386                 return -EFAULT;
4387
4388         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4389          * session deletion, but it's still in sess_del_work wq */
4390         if (sess->deleted) {
4391                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4392                     "New command while old session %p is being deleted\n",
4393                     sess);
4394                 return -EFAULT;
4395         }
4396
4397         /*
4398          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4399          */
4400         if (!kref_get_unless_zero(&sess->sess_kref)) {
4401                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4402                     "%s: kref_get fail, %8phC oxid %x \n",
4403                     __func__, sess->port_name,
4404                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4405                 return -EFAULT;
4406         }
4407
4408         cmd = qlt_get_tag(vha, sess, atio);
4409         if (!cmd) {
4410                 ql_dbg(ql_dbg_io, vha, 0x3062,
4411                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4412                 ha->tgt.tgt_ops->put_sess(sess);
4413                 return -EBUSY;
4414         }
4415
4416         cmd->cmd_in_wq = 1;
4417         cmd->trc_flags |= TRC_NEW_CMD;
4418
4419         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4420         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4421         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4422
4423         INIT_WORK(&cmd->work, qlt_do_work);
4424         if (vha->flags.qpairs_available) {
4425                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4426         } else if (ha->msix_count) {
4427                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4428                         queue_work(qla_tgt_wq, &cmd->work);
4429                 else
4430                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4431                             &cmd->work);
4432         } else {
4433                 queue_work(qla_tgt_wq, &cmd->work);
4434         }
4435
4436         return 0;
4437 }
4438
4439 /* ha->hardware_lock supposed to be held on entry */
4440 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4441         int fn, void *iocb, int flags)
4442 {
4443         struct scsi_qla_host *vha = sess->vha;
4444         struct qla_hw_data *ha = vha->hw;
4445         struct qla_tgt_mgmt_cmd *mcmd;
4446         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4447         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4448
4449         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4450         if (!mcmd) {
4451                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4452                     "qla_target(%d): Allocation of management "
4453                     "command failed, some commands and their data could "
4454                     "leak\n", vha->vp_idx);
4455                 return -ENOMEM;
4456         }
4457         memset(mcmd, 0, sizeof(*mcmd));
4458         mcmd->sess = sess;
4459
4460         if (iocb) {
4461                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4462                     sizeof(mcmd->orig_iocb.imm_ntfy));
4463         }
4464         mcmd->tmr_func = fn;
4465         mcmd->flags = flags;
4466         mcmd->reset_count = ha->base_qpair->chip_reset;
4467         mcmd->qpair = h->qpair;
4468         mcmd->vha = vha;
4469         mcmd->se_cmd.cpuid = h->cpuid;
4470         mcmd->unpacked_lun = lun;
4471
4472         switch (fn) {
4473         case QLA_TGT_LUN_RESET:
4474         case QLA_TGT_CLEAR_TS:
4475         case QLA_TGT_ABORT_TS:
4476                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4477                 fallthrough;
4478         case QLA_TGT_CLEAR_ACA:
4479                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4480                 mcmd->qpair = h->qpair;
4481                 mcmd->se_cmd.cpuid = h->cpuid;
4482                 break;
4483
4484         case QLA_TGT_TARGET_RESET:
4485         case QLA_TGT_NEXUS_LOSS_SESS:
4486         case QLA_TGT_NEXUS_LOSS:
4487         case QLA_TGT_ABORT_ALL:
4488         default:
4489                 /* no-op */
4490                 break;
4491         }
4492
4493         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4494         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4495             &mcmd->work);
4496
4497         return 0;
4498 }
4499
4500 /* ha->hardware_lock supposed to be held on entry */
4501 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4502 {
4503         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4504         struct qla_hw_data *ha = vha->hw;
4505         struct fc_port *sess;
4506         u64 unpacked_lun;
4507         int fn;
4508         unsigned long flags;
4509
4510         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4511
4512         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4513         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4514             a->u.isp24.fcp_hdr.s_id);
4515         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4516
4517         unpacked_lun =
4518             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4519
4520         if (sess == NULL || sess->deleted)
4521                 return -EFAULT;
4522
4523         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4524 }
4525
4526 /* ha->hardware_lock supposed to be held on entry */
4527 static int __qlt_abort_task(struct scsi_qla_host *vha,
4528         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4529 {
4530         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4531         struct qla_hw_data *ha = vha->hw;
4532         struct qla_tgt_mgmt_cmd *mcmd;
4533         u64 unpacked_lun;
4534         int rc;
4535
4536         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4537         if (mcmd == NULL) {
4538                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4539                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4540                     vha->vp_idx, __func__);
4541                 return -ENOMEM;
4542         }
4543         memset(mcmd, 0, sizeof(*mcmd));
4544
4545         mcmd->sess = sess;
4546         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4547             sizeof(mcmd->orig_iocb.imm_ntfy));
4548
4549         unpacked_lun =
4550             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4551         mcmd->reset_count = ha->base_qpair->chip_reset;
4552         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4553         mcmd->qpair = ha->base_qpair;
4554
4555         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4556             le16_to_cpu(iocb->u.isp2x.seq_id));
4557         if (rc != 0) {
4558                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4559                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4560                     vha->vp_idx, rc);
4561                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4562                 return -EFAULT;
4563         }
4564
4565         return 0;
4566 }
4567
4568 /* ha->hardware_lock supposed to be held on entry */
4569 static int qlt_abort_task(struct scsi_qla_host *vha,
4570         struct imm_ntfy_from_isp *iocb)
4571 {
4572         struct qla_hw_data *ha = vha->hw;
4573         struct fc_port *sess;
4574         int loop_id;
4575         unsigned long flags;
4576
4577         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4578
4579         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4580         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4581         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4582
4583         if (sess == NULL) {
4584                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4585                     "qla_target(%d): task abort for unexisting "
4586                     "session\n", vha->vp_idx);
4587                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4588                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4589         }
4590
4591         return __qlt_abort_task(vha, iocb, sess);
4592 }
4593
4594 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4595 {
4596         if (rc != MBS_COMMAND_COMPLETE) {
4597                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4598                         "%s: se_sess %p / sess %p from"
4599                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4600                         " LOGO failed: %#x\n",
4601                         __func__,
4602                         fcport->se_sess,
4603                         fcport,
4604                         fcport->port_name, fcport->loop_id,
4605                         fcport->d_id.b.domain, fcport->d_id.b.area,
4606                         fcport->d_id.b.al_pa, rc);
4607         }
4608
4609         fcport->logout_completed = 1;
4610 }
4611
4612 /*
4613 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4614 *
4615 * Schedules sessions with matching port_id/loop_id but different wwn for
4616 * deletion. Returns existing session with matching wwn if present.
4617 * Null otherwise.
4618 */
4619 struct fc_port *
4620 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4621     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4622 {
4623         struct fc_port *sess = NULL, *other_sess;
4624         uint64_t other_wwn;
4625
4626         *conflict_sess = NULL;
4627
4628         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4629
4630                 other_wwn = wwn_to_u64(other_sess->port_name);
4631
4632                 if (wwn == other_wwn) {
4633                         WARN_ON(sess);
4634                         sess = other_sess;
4635                         continue;
4636                 }
4637
4638                 /* find other sess with nport_id collision */
4639                 if (port_id.b24 == other_sess->d_id.b24) {
4640                         if (loop_id != other_sess->loop_id) {
4641                                 ql_dbg(ql_dbg_disc, vha, 0x1000c,
4642                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4643                                     other_sess, other_sess->loop_id, other_wwn);
4644
4645                                 /*
4646                                  * logout_on_delete is set by default, but another
4647                                  * session that has the same s_id/loop_id combo
4648                                  * might have cleared it when requested this session
4649                                  * deletion, so don't touch it
4650                                  */
4651                                 qlt_schedule_sess_for_deletion(other_sess);
4652                         } else {
4653                                 /*
4654                                  * Another wwn used to have our s_id/loop_id
4655                                  * kill the session, but don't free the loop_id
4656                                  */
4657                                 ql_dbg(ql_dbg_disc, vha, 0xf01b,
4658                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4659                                     other_sess, other_sess->loop_id, other_wwn);
4660
4661                                 other_sess->keep_nport_handle = 1;
4662                                 if (other_sess->disc_state != DSC_DELETED)
4663                                         *conflict_sess = other_sess;
4664                                 qlt_schedule_sess_for_deletion(other_sess);
4665                         }
4666                         continue;
4667                 }
4668
4669                 /* find other sess with nport handle collision */
4670                 if ((loop_id == other_sess->loop_id) &&
4671                         (loop_id != FC_NO_LOOP_ID)) {
4672                         ql_dbg(ql_dbg_disc, vha, 0x1000d,
4673                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4674                                other_sess, other_sess->loop_id, other_wwn);
4675
4676                         /* Same loop_id but different s_id
4677                          * Ok to kill and logout */
4678                         qlt_schedule_sess_for_deletion(other_sess);
4679                 }
4680         }
4681
4682         return sess;
4683 }
4684
4685 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4686 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4687 {
4688         struct qla_tgt_sess_op *op;
4689         struct qla_tgt_cmd *cmd;
4690         uint32_t key;
4691         int count = 0;
4692         unsigned long flags;
4693
4694         key = (((u32)s_id->b.domain << 16) |
4695                ((u32)s_id->b.area   <<  8) |
4696                ((u32)s_id->b.al_pa));
4697
4698         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4699         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4700                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4701
4702                 if (op_key == key) {
4703                         op->aborted = true;
4704                         count++;
4705                 }
4706         }
4707
4708         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4709                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4710
4711                 if (cmd_key == key) {
4712                         cmd->aborted = 1;
4713                         count++;
4714                 }
4715         }
4716         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4717
4718         return count;
4719 }
4720
4721 static int qlt_handle_login(struct scsi_qla_host *vha,
4722     struct imm_ntfy_from_isp *iocb)
4723 {
4724         struct fc_port *sess = NULL, *conflict_sess = NULL;
4725         uint64_t wwn;
4726         port_id_t port_id;
4727         uint16_t loop_id, wd3_lo;
4728         int res = 0;
4729         struct qlt_plogi_ack_t *pla;
4730         unsigned long flags;
4731
4732         lockdep_assert_held(&vha->hw->hardware_lock);
4733
4734         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4735
4736         port_id.b.domain = iocb->u.isp24.port_id[2];
4737         port_id.b.area   = iocb->u.isp24.port_id[1];
4738         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4739         port_id.b.rsvd_1 = 0;
4740
4741         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4742
4743         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4744         abort_cmds_for_s_id(vha, &port_id);
4745
4746         if (wwn) {
4747                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4748                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4749                     port_id, loop_id, &conflict_sess);
4750                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4751         } else {
4752                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4753                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4754                     __func__, __LINE__, loop_id, port_id.b24);
4755                 qlt_send_term_imm_notif(vha, iocb, 1);
4756                 goto out;
4757         }
4758
4759         if (IS_SW_RESV_ADDR(port_id)) {
4760                 res = 1;
4761                 goto out;
4762         }
4763
4764         if (vha->hw->flags.edif_enabled &&
4765             !(vha->e_dbell.db_flags & EDB_ACTIVE) &&
4766             iocb->u.isp24.status_subcode == ELS_PLOGI &&
4767             !(le16_to_cpu(iocb->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
4768                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4769                         "%s %d Term INOT due to app not available lid=%d, NportID %06X ",
4770                         __func__, __LINE__, loop_id, port_id.b24);
4771                 qlt_send_term_imm_notif(vha, iocb, 1);
4772                 goto out;
4773         }
4774
4775         if (vha->hw->flags.edif_enabled) {
4776                 if (DBELL_INACTIVE(vha)) {
4777                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4778                                "%s %d Term INOT due to app not started lid=%d, NportID %06X ",
4779                                __func__, __LINE__, loop_id, port_id.b24);
4780                         qlt_send_term_imm_notif(vha, iocb, 1);
4781                         goto out;
4782                 } else if (iocb->u.isp24.status_subcode == ELS_PLOGI &&
4783                            !(le16_to_cpu(iocb->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
4784                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4785                                "%s %d Term INOT due to unsecure lid=%d, NportID %06X ",
4786                                __func__, __LINE__, loop_id, port_id.b24);
4787                         qlt_send_term_imm_notif(vha, iocb, 1);
4788                         goto out;
4789                 }
4790         }
4791
4792         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4793         if (!pla) {
4794                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4795                     "%s %d %8phC Term INOT due to mem alloc fail",
4796                     __func__, __LINE__,
4797                     iocb->u.isp24.port_name);
4798                 qlt_send_term_imm_notif(vha, iocb, 1);
4799                 goto out;
4800         }
4801
4802         if (conflict_sess) {
4803                 conflict_sess->login_gen++;
4804                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4805                     QLT_PLOGI_LINK_CONFLICT);
4806         }
4807
4808         if (!sess) {
4809                 pla->ref_count++;
4810                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4811                     "%s %d %8phC post new sess\n",
4812                     __func__, __LINE__, iocb->u.isp24.port_name);
4813                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4814                         qla24xx_post_newsess_work(vha, &port_id,
4815                             iocb->u.isp24.port_name,
4816                             iocb->u.isp24.u.plogi.node_name,
4817                             pla, 0);
4818                 else
4819                         qla24xx_post_newsess_work(vha, &port_id,
4820                             iocb->u.isp24.port_name, NULL,
4821                             pla, 0);
4822
4823                 goto out;
4824         }
4825
4826         if (sess->disc_state == DSC_UPD_FCPORT) {
4827                 u16 sec;
4828
4829                 /*
4830                  * Remote port registration is still going on from
4831                  * previous login. Allow it to finish before we
4832                  * accept the new login.
4833                  */
4834                 sess->next_disc_state = DSC_DELETE_PEND;
4835                 sec = jiffies_to_msecs(jiffies -
4836                     sess->jiffies_at_registration) / 1000;
4837                 if (sess->sec_since_registration < sec && sec &&
4838                     !(sec % 5)) {
4839                         sess->sec_since_registration = sec;
4840                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4841                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4842                             __func__, sess->port_name, sec);
4843                 }
4844
4845                 if (!conflict_sess) {
4846                         list_del(&pla->list);
4847                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4848                 }
4849
4850                 qlt_send_term_imm_notif(vha, iocb, 1);
4851                 goto out;
4852         }
4853
4854         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4855         sess->d_id = port_id;
4856         sess->login_gen++;
4857         sess->loop_id = loop_id;
4858
4859         if (iocb->u.isp24.status_subcode == ELS_PLOGI) {
4860                 /* remote port has assigned Port ID */
4861                 if (N2N_TOPO(vha->hw) && fcport_is_bigger(sess))
4862                         vha->d_id = sess->d_id;
4863
4864                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4865                     "%s %8phC - send port online\n",
4866                     __func__, sess->port_name);
4867
4868                 qla2x00_post_aen_work(vha, FCH_EVT_PORT_ONLINE,
4869                     sess->d_id.b24);
4870         }
4871
4872         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4873                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4874                 sess->local = 0;
4875                 sess->loop_id = loop_id;
4876                 sess->d_id = port_id;
4877                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4878                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4879
4880                 if (wd3_lo & BIT_7)
4881                         sess->conf_compl_supported = 1;
4882
4883                 if ((wd3_lo & BIT_4) == 0)
4884                         sess->port_type = FCT_INITIATOR;
4885                 else
4886                         sess->port_type = FCT_TARGET;
4887
4888         } else
4889                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4890
4891
4892         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4893             "%s %d %8phC  DS %d\n",
4894             __func__, __LINE__, sess->port_name, sess->disc_state);
4895
4896         switch (sess->disc_state) {
4897         case DSC_DELETED:
4898         case DSC_LOGIN_PEND:
4899                 qlt_plogi_ack_unref(vha, pla);
4900                 break;
4901
4902         default:
4903                 /*
4904                  * Under normal circumstances we want to release nport handle
4905                  * during LOGO process to avoid nport handle leaks inside FW.
4906                  * The exception is when LOGO is done while another PLOGI with
4907                  * the same nport handle is waiting as might be the case here.
4908                  * Note: there is always a possibily of a race where session
4909                  * deletion has already started for other reasons (e.g. ACL
4910                  * removal) and now PLOGI arrives:
4911                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4912                  *    FW must have assigned this PLOGI a new/same handle and we
4913                  *    can proceed ACK'ing it as usual when session deletion
4914                  *    completes.
4915                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4916                  *    bit reached it, the handle has now been released. We'll
4917                  *    get an error when we ACK this PLOGI. Nothing will be sent
4918                  *    back to initiator. Initiator should eventually retry
4919                  *    PLOGI and situation will correct itself.
4920                  */
4921                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4922                     (sess->d_id.b24 == port_id.b24));
4923
4924                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4925                     "%s %d %8phC post del sess\n",
4926                     __func__, __LINE__, sess->port_name);
4927
4928
4929                 qlt_schedule_sess_for_deletion(sess);
4930                 break;
4931         }
4932 out:
4933         return res;
4934 }
4935
4936 /*
4937  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4938  */
4939 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4940         struct imm_ntfy_from_isp *iocb)
4941 {
4942         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4943         struct qla_hw_data *ha = vha->hw;
4944         struct fc_port *sess = NULL, *conflict_sess = NULL;
4945         uint64_t wwn;
4946         port_id_t port_id;
4947         uint16_t loop_id;
4948         uint16_t wd3_lo;
4949         int res = 0;
4950         unsigned long flags;
4951
4952         lockdep_assert_held(&ha->hardware_lock);
4953
4954         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4955
4956         port_id.b.domain = iocb->u.isp24.port_id[2];
4957         port_id.b.area   = iocb->u.isp24.port_id[1];
4958         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4959         port_id.b.rsvd_1 = 0;
4960
4961         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4962
4963         ql_dbg(ql_dbg_disc, vha, 0xf026,
4964             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4965             vha->vp_idx, iocb->u.isp24.port_id[2],
4966                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4967                    iocb->u.isp24.status_subcode, loop_id,
4968                 iocb->u.isp24.port_name);
4969
4970         /* res = 1 means ack at the end of thread
4971          * res = 0 means ack async/later.
4972          */
4973         switch (iocb->u.isp24.status_subcode) {
4974         case ELS_PLOGI:
4975                 res = qlt_handle_login(vha, iocb);
4976                 break;
4977
4978         case ELS_PRLI:
4979                 if (N2N_TOPO(ha)) {
4980                         sess = qla2x00_find_fcport_by_wwpn(vha,
4981                             iocb->u.isp24.port_name, 1);
4982
4983                         if (vha->hw->flags.edif_enabled && sess &&
4984                             (!(sess->flags & FCF_FCSP_DEVICE) ||
4985                              !sess->edif.authok)) {
4986                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4987                                        "%s %d %8phC Term PRLI due to unauthorize PRLI\n",
4988                                        __func__, __LINE__, iocb->u.isp24.port_name);
4989                                 qlt_send_term_imm_notif(vha, iocb, 1);
4990                                 break;
4991                         }
4992
4993                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4994                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4995                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4996                                     __func__, __LINE__,
4997                                     iocb->u.isp24.port_name);
4998                                 qlt_send_term_imm_notif(vha, iocb, 1);
4999                                 break;
5000                         }
5001
5002                         res = qlt_handle_login(vha, iocb);
5003                         break;
5004                 }
5005
5006                 if (IS_SW_RESV_ADDR(port_id)) {
5007                         res = 1;
5008                         break;
5009                 }
5010
5011                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
5012
5013                 if (wwn) {
5014                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5015                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
5016                                 loop_id, &conflict_sess);
5017                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5018                 }
5019
5020                 if (conflict_sess) {
5021                         switch (conflict_sess->disc_state) {
5022                         case DSC_DELETED:
5023                         case DSC_DELETE_PEND:
5024                                 break;
5025                         default:
5026                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
5027                                     "PRLI with conflicting sess %p port %8phC\n",
5028                                     conflict_sess, conflict_sess->port_name);
5029                                 conflict_sess->fw_login_state =
5030                                     DSC_LS_PORT_UNAVAIL;
5031                                 qlt_send_term_imm_notif(vha, iocb, 1);
5032                                 res = 0;
5033                                 break;
5034                         }
5035                 }
5036
5037                 if (sess != NULL) {
5038                         bool delete = false;
5039                         int sec;
5040
5041                         if (vha->hw->flags.edif_enabled && sess &&
5042                             (!(sess->flags & FCF_FCSP_DEVICE) ||
5043                              !sess->edif.authok)) {
5044                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5045                                        "%s %d %8phC Term PRLI due to unauthorize prli\n",
5046                                        __func__, __LINE__, iocb->u.isp24.port_name);
5047                                 qlt_send_term_imm_notif(vha, iocb, 1);
5048                                 break;
5049                         }
5050
5051                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5052                         switch (sess->fw_login_state) {
5053                         case DSC_LS_PLOGI_PEND:
5054                         case DSC_LS_PLOGI_COMP:
5055                         case DSC_LS_PRLI_COMP:
5056                                 break;
5057                         default:
5058                                 delete = true;
5059                                 break;
5060                         }
5061
5062                         switch (sess->disc_state) {
5063                         case DSC_UPD_FCPORT:
5064                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5065                                     flags);
5066
5067                                 sec = jiffies_to_msecs(jiffies -
5068                                     sess->jiffies_at_registration)/1000;
5069                                 if (sess->sec_since_registration < sec && sec &&
5070                                     !(sec % 5)) {
5071                                         sess->sec_since_registration = sec;
5072                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
5073                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
5074                                             __func__, sess->port_name, sec);
5075                                 }
5076                                 qlt_send_term_imm_notif(vha, iocb, 1);
5077                                 return 0;
5078
5079                         case DSC_LOGIN_PEND:
5080                         case DSC_GPDB:
5081                         case DSC_LOGIN_COMPLETE:
5082                         case DSC_ADISC:
5083                                 delete = false;
5084                                 break;
5085                         default:
5086                                 break;
5087                         }
5088
5089                         if (delete) {
5090                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5091                                     flags);
5092                                 /*
5093                                  * Impatient initiator sent PRLI before last
5094                                  * PLOGI could finish. Will force him to re-try,
5095                                  * while last one finishes.
5096                                  */
5097                                 ql_log(ql_log_warn, sess->vha, 0xf095,
5098                                     "sess %p PRLI received, before plogi ack.\n",
5099                                     sess);
5100                                 qlt_send_term_imm_notif(vha, iocb, 1);
5101                                 res = 0;
5102                                 break;
5103                         }
5104
5105                         /*
5106                          * This shouldn't happen under normal circumstances,
5107                          * since we have deleted the old session during PLOGI
5108                          */
5109                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5110                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5111                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5112
5113                         sess->local = 0;
5114                         sess->loop_id = loop_id;
5115                         sess->d_id = port_id;
5116                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5117
5118                         if (wd3_lo & BIT_7)
5119                                 sess->conf_compl_supported = 1;
5120
5121                         if ((wd3_lo & BIT_4) == 0)
5122                                 sess->port_type = FCT_INITIATOR;
5123                         else
5124                                 sess->port_type = FCT_TARGET;
5125
5126                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5127                 }
5128                 res = 1; /* send notify ack */
5129
5130                 /* Make session global (not used in fabric mode) */
5131                 if (ha->current_topology != ISP_CFG_F) {
5132                         if (sess) {
5133                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5134                                     "%s %d %8phC post nack\n",
5135                                     __func__, __LINE__, sess->port_name);
5136                                 qla24xx_post_nack_work(vha, sess, iocb,
5137                                         SRB_NACK_PRLI);
5138                                 res = 0;
5139                         } else {
5140                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5141                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5142                                 qla2xxx_wake_dpc(vha);
5143                         }
5144                 } else {
5145                         if (sess) {
5146                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5147                                     "%s %d %8phC post nack\n",
5148                                     __func__, __LINE__, sess->port_name);
5149                                 qla24xx_post_nack_work(vha, sess, iocb,
5150                                         SRB_NACK_PRLI);
5151                                 res = 0;
5152                         }
5153                 }
5154                 break;
5155
5156         case ELS_TPRLO:
5157                 if (le16_to_cpu(iocb->u.isp24.flags) &
5158                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5159                         loop_id = 0xFFFF;
5160                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5161                         res = 1;
5162                         break;
5163                 }
5164                 fallthrough;
5165         case ELS_LOGO:
5166         case ELS_PRLO:
5167                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5168                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5169                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5170
5171                 if (sess) {
5172                         sess->login_gen++;
5173                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5174                         sess->logo_ack_needed = 1;
5175                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5176                 }
5177
5178                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5179
5180                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5181                     "%s: logo %llx res %d sess %p ",
5182                     __func__, wwn, res, sess);
5183                 if (res == 0) {
5184                         /*
5185                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5186                          * for LOGO_ACK & sess delete
5187                          */
5188                         BUG_ON(!sess);
5189                         res = 0;
5190                 } else {
5191                         /* cmd did not go to upper layer. */
5192                         if (sess) {
5193                                 qlt_schedule_sess_for_deletion(sess);
5194                                 res = 0;
5195                         }
5196                         /* else logo will be ack */
5197                 }
5198                 break;
5199         case ELS_PDISC:
5200         case ELS_ADISC:
5201         {
5202                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5203
5204                 if (tgt->link_reinit_iocb_pending) {
5205                         qlt_send_notify_ack(ha->base_qpair,
5206                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5207                         tgt->link_reinit_iocb_pending = 0;
5208                 }
5209
5210                 sess = qla2x00_find_fcport_by_wwpn(vha,
5211                     iocb->u.isp24.port_name, 1);
5212                 if (sess) {
5213                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5214                                 "sess %p lid %d|%d DS %d LS %d\n",
5215                                 sess, sess->loop_id, loop_id,
5216                                 sess->disc_state, sess->fw_login_state);
5217                 }
5218
5219                 res = 1; /* send notify ack */
5220                 break;
5221         }
5222
5223         case ELS_FLOGI: /* should never happen */
5224         default:
5225                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5226                     "qla_target(%d): Unsupported ELS command %x "
5227                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5228                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5229                 break;
5230         }
5231
5232         ql_dbg(ql_dbg_disc, vha, 0xf026,
5233             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5234             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5235
5236         return res;
5237 }
5238
5239 /*
5240  * ha->hardware_lock supposed to be held on entry.
5241  * Might drop it, then reacquire.
5242  */
5243 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5244         struct imm_ntfy_from_isp *iocb)
5245 {
5246         struct qla_hw_data *ha = vha->hw;
5247         uint32_t add_flags = 0;
5248         int send_notify_ack = 1;
5249         uint16_t status;
5250
5251         lockdep_assert_held(&ha->hardware_lock);
5252
5253         status = le16_to_cpu(iocb->u.isp2x.status);
5254         switch (status) {
5255         case IMM_NTFY_LIP_RESET:
5256         {
5257                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5258                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5259                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5260                     iocb->u.isp24.status_subcode);
5261
5262                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5263                         send_notify_ack = 0;
5264                 break;
5265         }
5266
5267         case IMM_NTFY_LIP_LINK_REINIT:
5268         {
5269                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5270
5271                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5272                     "qla_target(%d): LINK REINIT (loop %#x, "
5273                     "subcode %x)\n", vha->vp_idx,
5274                     le16_to_cpu(iocb->u.isp24.nport_handle),
5275                     iocb->u.isp24.status_subcode);
5276                 if (tgt->link_reinit_iocb_pending) {
5277                         qlt_send_notify_ack(ha->base_qpair,
5278                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5279                 }
5280                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5281                 tgt->link_reinit_iocb_pending = 1;
5282                 /*
5283                  * QLogic requires to wait after LINK REINIT for possible
5284                  * PDISC or ADISC ELS commands
5285                  */
5286                 send_notify_ack = 0;
5287                 break;
5288         }
5289
5290         case IMM_NTFY_PORT_LOGOUT:
5291                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5292                     "qla_target(%d): Port logout (loop "
5293                     "%#x, subcode %x)\n", vha->vp_idx,
5294                     le16_to_cpu(iocb->u.isp24.nport_handle),
5295                     iocb->u.isp24.status_subcode);
5296
5297                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5298                         send_notify_ack = 0;
5299                 /* The sessions will be cleared in the callback, if needed */
5300                 break;
5301
5302         case IMM_NTFY_GLBL_TPRLO:
5303                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5304                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5305                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5306                         send_notify_ack = 0;
5307                 /* The sessions will be cleared in the callback, if needed */
5308                 break;
5309
5310         case IMM_NTFY_PORT_CONFIG:
5311                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5312                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5313                     status);
5314                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5315                         send_notify_ack = 0;
5316                 /* The sessions will be cleared in the callback, if needed */
5317                 break;
5318
5319         case IMM_NTFY_GLBL_LOGO:
5320                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5321                     "qla_target(%d): Link failure detected\n",
5322                     vha->vp_idx);
5323                 /* I_T nexus loss */
5324                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5325                         send_notify_ack = 0;
5326                 break;
5327
5328         case IMM_NTFY_IOCB_OVERFLOW:
5329                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5330                     "qla_target(%d): Cannot provide requested "
5331                     "capability (IOCB overflowed the immediate notify "
5332                     "resource count)\n", vha->vp_idx);
5333                 break;
5334
5335         case IMM_NTFY_ABORT_TASK:
5336                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5337                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5338                     "L %#x)\n", vha->vp_idx,
5339                     le16_to_cpu(iocb->u.isp2x.seq_id),
5340                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5341                     le16_to_cpu(iocb->u.isp2x.lun));
5342                 if (qlt_abort_task(vha, iocb) == 0)
5343                         send_notify_ack = 0;
5344                 break;
5345
5346         case IMM_NTFY_RESOURCE:
5347                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5348                     "qla_target(%d): Out of resources, host %ld\n",
5349                     vha->vp_idx, vha->host_no);
5350                 break;
5351
5352         case IMM_NTFY_MSG_RX:
5353                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5354                     "qla_target(%d): Immediate notify task %x\n",
5355                     vha->vp_idx, iocb->u.isp2x.task_flags);
5356                 break;
5357
5358         case IMM_NTFY_ELS:
5359                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5360                         send_notify_ack = 0;
5361                 break;
5362         default:
5363                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5364                     "qla_target(%d): Received unknown immediate "
5365                     "notify status %x\n", vha->vp_idx, status);
5366                 break;
5367         }
5368
5369         if (send_notify_ack)
5370                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5371                     0, 0);
5372 }
5373
5374 /*
5375  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5376  * This function sends busy to ISP 2xxx or 24xx.
5377  */
5378 static int __qlt_send_busy(struct qla_qpair *qpair,
5379         struct atio_from_isp *atio, uint16_t status)
5380 {
5381         struct scsi_qla_host *vha = qpair->vha;
5382         struct ctio7_to_24xx *ctio24;
5383         struct qla_hw_data *ha = vha->hw;
5384         request_t *pkt;
5385         struct fc_port *sess = NULL;
5386         unsigned long flags;
5387         u16 temp;
5388         port_id_t id;
5389
5390         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5391
5392         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5393         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5394         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5395         if (!sess) {
5396                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5397                 return 0;
5398         }
5399         /* Sending marker isn't necessary, since we called from ISR */
5400
5401         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5402         if (!pkt) {
5403                 ql_dbg(ql_dbg_io, vha, 0x3063,
5404                     "qla_target(%d): %s failed: unable to allocate "
5405                     "request packet", vha->vp_idx, __func__);
5406                 return -ENOMEM;
5407         }
5408
5409         qpair->tgt_counters.num_q_full_sent++;
5410         pkt->entry_count = 1;
5411         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5412
5413         ctio24 = (struct ctio7_to_24xx *)pkt;
5414         ctio24->entry_type = CTIO_TYPE7;
5415         ctio24->nport_handle = cpu_to_le16(sess->loop_id);
5416         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5417         ctio24->vp_index = vha->vp_idx;
5418         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5419         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5420         temp = (atio->u.isp24.attr << 9) |
5421                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5422                 CTIO7_FLAGS_DONT_RET_CTIO;
5423         ctio24->u.status1.flags = cpu_to_le16(temp);
5424         /*
5425          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5426          * if the explicit conformation is used.
5427          */
5428         ctio24->u.status1.ox_id =
5429                 cpu_to_le16(be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
5430         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5431
5432         ctio24->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
5433
5434         if (ctio24->u.status1.residual != 0)
5435                 ctio24->u.status1.scsi_status |= cpu_to_le16(SS_RESIDUAL_UNDER);
5436
5437         /* Memory Barrier */
5438         wmb();
5439         if (qpair->reqq_start_iocbs)
5440                 qpair->reqq_start_iocbs(qpair);
5441         else
5442                 qla2x00_start_iocbs(vha, qpair->req);
5443         return 0;
5444 }
5445
5446 /*
5447  * This routine is used to allocate a command for either a QFull condition
5448  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5449  * out previously.
5450  */
5451 static void
5452 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5453         struct atio_from_isp *atio, uint16_t status, int qfull)
5454 {
5455         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5456         struct qla_hw_data *ha = vha->hw;
5457         struct fc_port *sess;
5458         struct qla_tgt_cmd *cmd;
5459         unsigned long flags;
5460
5461         if (unlikely(tgt->tgt_stop)) {
5462                 ql_dbg(ql_dbg_io, vha, 0x300a,
5463                         "New command while device %p is shutting down\n", tgt);
5464                 return;
5465         }
5466
5467         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5468                 vha->hw->tgt.num_qfull_cmds_dropped++;
5469                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5470                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5471                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5472                                 vha->hw->tgt.num_qfull_cmds_dropped;
5473
5474                 ql_dbg(ql_dbg_io, vha, 0x3068,
5475                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5476                         vha->vp_idx, __func__,
5477                         vha->hw->tgt.num_qfull_cmds_dropped);
5478
5479                 qlt_chk_exch_leak_thresh_hold(vha);
5480                 return;
5481         }
5482
5483         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5484                 (vha, atio->u.isp24.fcp_hdr.s_id);
5485         if (!sess)
5486                 return;
5487
5488         cmd = ha->tgt.tgt_ops->get_cmd(sess);
5489         if (!cmd) {
5490                 ql_dbg(ql_dbg_io, vha, 0x3009,
5491                         "qla_target(%d): %s: Allocation of cmd failed\n",
5492                         vha->vp_idx, __func__);
5493
5494                 vha->hw->tgt.num_qfull_cmds_dropped++;
5495                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5496                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5497                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5498                                 vha->hw->tgt.num_qfull_cmds_dropped;
5499
5500                 qlt_chk_exch_leak_thresh_hold(vha);
5501                 return;
5502         }
5503
5504         qlt_incr_num_pend_cmds(vha);
5505         INIT_LIST_HEAD(&cmd->cmd_list);
5506         memcpy(&cmd->atio, atio, sizeof(*atio));
5507
5508         cmd->tgt = vha->vha_tgt.qla_tgt;
5509         cmd->vha = vha;
5510         cmd->reset_count = ha->base_qpair->chip_reset;
5511         cmd->q_full = 1;
5512         cmd->qpair = ha->base_qpair;
5513
5514         if (qfull) {
5515                 cmd->q_full = 1;
5516                 /* NOTE: borrowing the state field to carry the status */
5517                 cmd->state = status;
5518         } else
5519                 cmd->term_exchg = 1;
5520
5521         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5522         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5523
5524         vha->hw->tgt.num_qfull_cmds_alloc++;
5525         if (vha->hw->tgt.num_qfull_cmds_alloc >
5526                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5527                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5528                         vha->hw->tgt.num_qfull_cmds_alloc;
5529         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5530 }
5531
5532 int
5533 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5534 {
5535         struct scsi_qla_host *vha = qpair->vha;
5536         struct qla_hw_data *ha = vha->hw;
5537         unsigned long flags;
5538         struct qla_tgt_cmd *cmd, *tcmd;
5539         struct list_head free_list, q_full_list;
5540         int rc = 0;
5541
5542         if (list_empty(&ha->tgt.q_full_list))
5543                 return 0;
5544
5545         INIT_LIST_HEAD(&free_list);
5546         INIT_LIST_HEAD(&q_full_list);
5547
5548         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5549         if (list_empty(&ha->tgt.q_full_list)) {
5550                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5551                 return 0;
5552         }
5553
5554         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5555         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5556
5557         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5558         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5559                 if (cmd->q_full)
5560                         /* cmd->state is a borrowed field to hold status */
5561                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5562                 else if (cmd->term_exchg)
5563                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5564
5565                 if (rc == -ENOMEM)
5566                         break;
5567
5568                 if (cmd->q_full)
5569                         ql_dbg(ql_dbg_io, vha, 0x3006,
5570                             "%s: busy sent for ox_id[%04x]\n", __func__,
5571                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5572                 else if (cmd->term_exchg)
5573                         ql_dbg(ql_dbg_io, vha, 0x3007,
5574                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5575                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5576                 else
5577                         ql_dbg(ql_dbg_io, vha, 0x3008,
5578                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5579                             cmd);
5580
5581                 list_move_tail(&cmd->cmd_list, &free_list);
5582
5583                 /* piggy back on hardware_lock for protection */
5584                 vha->hw->tgt.num_qfull_cmds_alloc--;
5585         }
5586         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5587
5588         cmd = NULL;
5589
5590         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5591                 list_del(&cmd->cmd_list);
5592                 /* This cmd was never sent to TCM.  There is no need
5593                  * to schedule free or call free_cmd
5594                  */
5595                 qlt_free_cmd(cmd);
5596         }
5597
5598         if (!list_empty(&q_full_list)) {
5599                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5600                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5601                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5602         }
5603
5604         return rc;
5605 }
5606
5607 static void
5608 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5609     uint16_t status)
5610 {
5611         int rc = 0;
5612         struct scsi_qla_host *vha = qpair->vha;
5613
5614         rc = __qlt_send_busy(qpair, atio, status);
5615         if (rc == -ENOMEM)
5616                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5617 }
5618
5619 static int
5620 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5621         struct atio_from_isp *atio, uint8_t ha_locked)
5622 {
5623         struct qla_hw_data *ha = vha->hw;
5624         unsigned long flags;
5625
5626         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5627                 return 0;
5628
5629         if (!ha_locked)
5630                 spin_lock_irqsave(&ha->hardware_lock, flags);
5631         qlt_send_busy(qpair, atio, qla_sam_status);
5632         if (!ha_locked)
5633                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5634
5635         return 1;
5636 }
5637
5638 /* ha->hardware_lock supposed to be held on entry */
5639 /* called via callback from qla2xxx */
5640 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5641         struct atio_from_isp *atio, uint8_t ha_locked)
5642 {
5643         struct qla_hw_data *ha = vha->hw;
5644         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5645         int rc;
5646         unsigned long flags = 0;
5647
5648         if (unlikely(tgt == NULL)) {
5649                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5650                     "ATIO pkt, but no tgt (ha %p)", ha);
5651                 return;
5652         }
5653         /*
5654          * In tgt_stop mode we also should allow all requests to pass.
5655          * Otherwise, some commands can stuck.
5656          */
5657
5658         tgt->atio_irq_cmd_count++;
5659
5660         switch (atio->u.raw.entry_type) {
5661         case ATIO_TYPE7:
5662                 if (unlikely(atio->u.isp24.exchange_addr ==
5663                              cpu_to_le32(ATIO_EXCHANGE_ADDRESS_UNKNOWN))) {
5664                         ql_dbg(ql_dbg_io, vha, 0x3065,
5665                             "qla_target(%d): ATIO_TYPE7 "
5666                             "received with UNKNOWN exchange address, "
5667                             "sending QUEUE_FULL\n", vha->vp_idx);
5668                         if (!ha_locked)
5669                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5670                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5671                         if (!ha_locked)
5672                                 spin_unlock_irqrestore(&ha->hardware_lock,
5673                                     flags);
5674                         break;
5675                 }
5676
5677                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5678                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5679                             atio, ha_locked);
5680                         if (rc != 0) {
5681                                 tgt->atio_irq_cmd_count--;
5682                                 return;
5683                         }
5684                         rc = qlt_handle_cmd_for_atio(vha, atio);
5685                 } else {
5686                         rc = qlt_handle_task_mgmt(vha, atio);
5687                 }
5688                 if (unlikely(rc != 0)) {
5689                         if (!ha_locked)
5690                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5691                         switch (rc) {
5692                         case -ENODEV:
5693                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5694                                     "qla_target: Unable to send command to target\n");
5695                                 break;
5696                         case -EBADF:
5697                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5698                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5699                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5700                                     atio, 1, 0);
5701                                 break;
5702                         case -EBUSY:
5703                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5704                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5705                                     vha->vp_idx);
5706                                 qlt_send_busy(ha->base_qpair, atio,
5707                                     tc_sam_status);
5708                                 break;
5709                         default:
5710                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5711                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5712                                     vha->vp_idx);
5713                                 qlt_send_busy(ha->base_qpair, atio,
5714                                     qla_sam_status);
5715                                 break;
5716                         }
5717                         if (!ha_locked)
5718                                 spin_unlock_irqrestore(&ha->hardware_lock,
5719                                     flags);
5720                 }
5721                 break;
5722
5723         case IMMED_NOTIFY_TYPE:
5724         {
5725                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5726                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5727                             "qla_target(%d): Received ATIO packet %x "
5728                             "with error status %x\n", vha->vp_idx,
5729                             atio->u.raw.entry_type,
5730                             atio->u.isp2x.entry_status);
5731                         break;
5732                 }
5733                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5734
5735                 if (!ha_locked)
5736                         spin_lock_irqsave(&ha->hardware_lock, flags);
5737                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5738                 if (!ha_locked)
5739                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5740                 break;
5741         }
5742
5743         default:
5744                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5745                     "qla_target(%d): Received unknown ATIO atio "
5746                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5747                 break;
5748         }
5749
5750         tgt->atio_irq_cmd_count--;
5751 }
5752
5753 /*
5754  * qpair lock is assume to be held
5755  * rc = 0 : send terminate & abts respond
5756  * rc != 0: do not send term & abts respond
5757  */
5758 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5759     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5760 {
5761         struct qla_hw_data *ha = vha->hw;
5762         int rc = 0;
5763
5764         /*
5765          * Detect unresolved exchange. If the same ABTS is unable
5766          * to terminate an existing command and the same ABTS loops
5767          * between FW & Driver, then force FW dump. Under 1 jiff,
5768          * we should see multiple loops.
5769          */
5770         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5771             qpair->retry_term_jiff == jiffies) {
5772                 /* found existing exchange */
5773                 qpair->retry_term_cnt++;
5774                 if (qpair->retry_term_cnt >= 5) {
5775                         rc = -EIO;
5776                         qpair->retry_term_cnt = 0;
5777                         ql_log(ql_log_warn, vha, 0xffff,
5778                             "Unable to send ABTS Respond. Dumping firmware.\n");
5779                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5780                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5781
5782                         if (qpair == ha->base_qpair)
5783                                 ha->isp_ops->fw_dump(vha);
5784                         else
5785                                 qla2xxx_dump_fw(vha);
5786
5787                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5788                         qla2xxx_wake_dpc(vha);
5789                 }
5790         } else if (qpair->retry_term_jiff != jiffies) {
5791                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5792                 qpair->retry_term_cnt = 0;
5793                 qpair->retry_term_jiff = jiffies;
5794         }
5795
5796         return rc;
5797 }
5798
5799
5800 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5801         struct rsp_que *rsp, response_t *pkt)
5802 {
5803         struct abts_resp_from_24xx_fw *entry =
5804                 (struct abts_resp_from_24xx_fw *)pkt;
5805         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5806         struct qla_tgt_mgmt_cmd *mcmd;
5807         struct qla_hw_data *ha = vha->hw;
5808
5809         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5810         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5811                 ql_dbg(ql_dbg_async, vha, 0xe064,
5812                     "qla_target(%d): ABTS Comp without mcmd\n",
5813                     vha->vp_idx);
5814                 return;
5815         }
5816
5817         if (mcmd)
5818                 vha  = mcmd->vha;
5819         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5820
5821         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5822             "ABTS_RESP_24XX: compl_status %x\n",
5823             entry->compl_status);
5824
5825         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5826                 if (le32_to_cpu(entry->error_subcode1) == 0x1E &&
5827                     le32_to_cpu(entry->error_subcode2) == 0) {
5828                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5829                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5830                                 return;
5831                         }
5832                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5833                             pkt, mcmd);
5834                 } else {
5835                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5836                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5837                             vha->vp_idx, entry->compl_status,
5838                             entry->error_subcode1,
5839                             entry->error_subcode2);
5840                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5841                 }
5842         } else if (mcmd) {
5843                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5844         }
5845 }
5846
5847 /* ha->hardware_lock supposed to be held on entry */
5848 /* called via callback from qla2xxx */
5849 static void qlt_response_pkt(struct scsi_qla_host *vha,
5850         struct rsp_que *rsp, response_t *pkt)
5851 {
5852         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5853
5854         if (unlikely(tgt == NULL)) {
5855                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5856                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5857                     vha->vp_idx, pkt->entry_type, vha->hw);
5858                 return;
5859         }
5860
5861         /*
5862          * In tgt_stop mode we also should allow all requests to pass.
5863          * Otherwise, some commands can stuck.
5864          */
5865
5866         switch (pkt->entry_type) {
5867         case CTIO_CRC2:
5868         case CTIO_TYPE7:
5869         {
5870                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5871
5872                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5873                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5874                     entry);
5875                 break;
5876         }
5877
5878         case ACCEPT_TGT_IO_TYPE:
5879         {
5880                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5881                 int rc;
5882
5883                 if (atio->u.isp2x.status !=
5884                     cpu_to_le16(ATIO_CDB_VALID)) {
5885                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5886                             "qla_target(%d): ATIO with error "
5887                             "status %x received\n", vha->vp_idx,
5888                             le16_to_cpu(atio->u.isp2x.status));
5889                         break;
5890                 }
5891
5892                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5893                 if (rc != 0)
5894                         return;
5895
5896                 rc = qlt_handle_cmd_for_atio(vha, atio);
5897                 if (unlikely(rc != 0)) {
5898                         switch (rc) {
5899                         case -ENODEV:
5900                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5901                                     "qla_target: Unable to send command to target\n");
5902                                 break;
5903                         case -EBADF:
5904                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5905                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5906                                 qlt_send_term_exchange(rsp->qpair, NULL,
5907                                     atio, 1, 0);
5908                                 break;
5909                         case -EBUSY:
5910                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5911                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5912                                     vha->vp_idx);
5913                                 qlt_send_busy(rsp->qpair, atio,
5914                                     tc_sam_status);
5915                                 break;
5916                         default:
5917                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5918                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5919                                     vha->vp_idx);
5920                                 qlt_send_busy(rsp->qpair, atio,
5921                                     qla_sam_status);
5922                                 break;
5923                         }
5924                 }
5925         }
5926         break;
5927
5928         case CONTINUE_TGT_IO_TYPE:
5929         {
5930                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5931
5932                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5933                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5934                     entry);
5935                 break;
5936         }
5937
5938         case CTIO_A64_TYPE:
5939         {
5940                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5941
5942                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5943                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5944                     entry);
5945                 break;
5946         }
5947
5948         case IMMED_NOTIFY_TYPE:
5949                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5950                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5951                 break;
5952
5953         case NOTIFY_ACK_TYPE:
5954                 if (tgt->notify_ack_expected > 0) {
5955                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5956
5957                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5958                             "NOTIFY_ACK seq %08x status %x\n",
5959                             le16_to_cpu(entry->u.isp2x.seq_id),
5960                             le16_to_cpu(entry->u.isp2x.status));
5961                         tgt->notify_ack_expected--;
5962                         if (entry->u.isp2x.status !=
5963                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5964                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5965                                     "qla_target(%d): NOTIFY_ACK "
5966                                     "failed %x\n", vha->vp_idx,
5967                                     le16_to_cpu(entry->u.isp2x.status));
5968                         }
5969                 } else {
5970                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5971                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5972                             vha->vp_idx);
5973                 }
5974                 break;
5975
5976         case ABTS_RECV_24XX:
5977                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5978                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5979                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5980                 break;
5981
5982         case ABTS_RESP_24XX:
5983                 if (tgt->abts_resp_expected > 0) {
5984                         qlt_handle_abts_completion(vha, rsp, pkt);
5985                 } else {
5986                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5987                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5988                             "received\n", vha->vp_idx);
5989                 }
5990                 break;
5991
5992         default:
5993                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5994                     "qla_target(%d): Received unknown response pkt "
5995                     "type %x\n", vha->vp_idx, pkt->entry_type);
5996                 break;
5997         }
5998
5999 }
6000
6001 /*
6002  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
6003  */
6004 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
6005         uint16_t *mailbox)
6006 {
6007         struct qla_hw_data *ha = vha->hw;
6008         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6009         int login_code;
6010
6011         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
6012                 return;
6013
6014         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
6015             IS_QLA2100(ha))
6016                 return;
6017         /*
6018          * In tgt_stop mode we also should allow all requests to pass.
6019          * Otherwise, some commands can stuck.
6020          */
6021
6022
6023         switch (code) {
6024         case MBA_RESET:                 /* Reset */
6025         case MBA_SYSTEM_ERR:            /* System Error */
6026         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
6027         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
6028                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
6029                     "qla_target(%d): System error async event %#x "
6030                     "occurred", vha->vp_idx, code);
6031                 break;
6032         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
6033                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6034                 break;
6035
6036         case MBA_LOOP_UP:
6037         {
6038                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
6039                     "qla_target(%d): Async LOOP_UP occurred "
6040                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
6041                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6042                 if (tgt->link_reinit_iocb_pending) {
6043                         qlt_send_notify_ack(ha->base_qpair,
6044                             &tgt->link_reinit_iocb,
6045                             0, 0, 0, 0, 0, 0);
6046                         tgt->link_reinit_iocb_pending = 0;
6047                 }
6048                 break;
6049         }
6050
6051         case MBA_LIP_OCCURRED:
6052         case MBA_LOOP_DOWN:
6053         case MBA_LIP_RESET:
6054         case MBA_RSCN_UPDATE:
6055                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
6056                     "qla_target(%d): Async event %#x occurred "
6057                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6058                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6059                 break;
6060
6061         case MBA_REJECTED_FCP_CMD:
6062                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
6063                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
6064                     vha->vp_idx,
6065                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6066
6067                 if (mailbox[3] == 1) {
6068                         /* exchange starvation. */
6069                         vha->hw->exch_starvation++;
6070                         if (vha->hw->exch_starvation > 5) {
6071                                 ql_log(ql_log_warn, vha, 0xd03a,
6072                                     "Exchange starvation-. Resetting RISC\n");
6073
6074                                 vha->hw->exch_starvation = 0;
6075                                 if (IS_P3P_TYPE(vha->hw))
6076                                         set_bit(FCOE_CTX_RESET_NEEDED,
6077                                             &vha->dpc_flags);
6078                                 else
6079                                         set_bit(ISP_ABORT_NEEDED,
6080                                             &vha->dpc_flags);
6081                                 qla2xxx_wake_dpc(vha);
6082                         }
6083                 }
6084                 break;
6085
6086         case MBA_PORT_UPDATE:
6087                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
6088                     "qla_target(%d): Port update async event %#x "
6089                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
6090                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6091                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6092
6093                 login_code = mailbox[2];
6094                 if (login_code == 0x4) {
6095                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
6096                             "Async MB 2: Got PLOGI Complete\n");
6097                         vha->hw->exch_starvation = 0;
6098                 } else if (login_code == 0x7)
6099                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
6100                             "Async MB 2: Port Logged Out\n");
6101                 break;
6102         default:
6103                 break;
6104         }
6105
6106 }
6107
6108 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6109         uint16_t loop_id)
6110 {
6111         fc_port_t *fcport, *tfcp, *del;
6112         int rc;
6113         unsigned long flags;
6114         u8 newfcport = 0;
6115
6116         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6117         if (!fcport) {
6118                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6119                     "qla_target(%d): Allocation of tmp FC port failed",
6120                     vha->vp_idx);
6121                 return NULL;
6122         }
6123
6124         fcport->loop_id = loop_id;
6125
6126         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6127         if (rc != QLA_SUCCESS) {
6128                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6129                     "qla_target(%d): Failed to retrieve fcport "
6130                     "information -- get_port_database() returned %x "
6131                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6132                 kfree(fcport);
6133                 return NULL;
6134         }
6135
6136         del = NULL;
6137         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6138         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6139
6140         if (tfcp) {
6141                 tfcp->d_id = fcport->d_id;
6142                 tfcp->port_type = fcport->port_type;
6143                 tfcp->supported_classes = fcport->supported_classes;
6144                 tfcp->flags |= fcport->flags;
6145                 tfcp->scan_state = QLA_FCPORT_FOUND;
6146
6147                 del = fcport;
6148                 fcport = tfcp;
6149         } else {
6150                 if (vha->hw->current_topology == ISP_CFG_F)
6151                         fcport->flags |= FCF_FABRIC_DEVICE;
6152
6153                 list_add_tail(&fcport->list, &vha->vp_fcports);
6154                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6155                    vha->fcport_count++;
6156                 fcport->login_gen++;
6157                 qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_COMPLETE);
6158                 fcport->login_succ = 1;
6159                 newfcport = 1;
6160         }
6161
6162         fcport->deleted = 0;
6163         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6164
6165         switch (vha->host->active_mode) {
6166         case MODE_INITIATOR:
6167         case MODE_DUAL:
6168                 if (newfcport) {
6169                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6170                                 qla24xx_sched_upd_fcport(fcport);
6171                         } else {
6172                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6173                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6174                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6175                                 qla24xx_post_gpsc_work(vha, fcport);
6176                         }
6177                 }
6178                 break;
6179
6180         case MODE_TARGET:
6181         default:
6182                 break;
6183         }
6184         if (del)
6185                 qla2x00_free_fcport(del);
6186
6187         return fcport;
6188 }
6189
6190 /* Must be called under tgt_mutex */
6191 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6192                                            be_id_t s_id)
6193 {
6194         struct fc_port *sess = NULL;
6195         fc_port_t *fcport = NULL;
6196         int rc, global_resets;
6197         uint16_t loop_id = 0;
6198
6199         if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6200                 /*
6201                  * This is Domain Controller, so it should be
6202                  * OK to drop SCSI commands from it.
6203                  */
6204                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6205                     "Unable to find initiator with S_ID %x:%x:%x",
6206                     s_id.domain, s_id.area, s_id.al_pa);
6207                 return NULL;
6208         }
6209
6210         mutex_lock(&vha->vha_tgt.tgt_mutex);
6211
6212 retry:
6213         global_resets =
6214             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6215
6216         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6217         if (rc != 0) {
6218                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6219
6220                 ql_log(ql_log_info, vha, 0xf071,
6221                     "qla_target(%d): Unable to find "
6222                     "initiator with S_ID %x:%x:%x",
6223                     vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6224
6225                 if (rc == -ENOENT) {
6226                         qlt_port_logo_t logo;
6227
6228                         logo.id = be_to_port_id(s_id);
6229                         logo.cmd_count = 1;
6230                         qlt_send_first_logo(vha, &logo);
6231                 }
6232
6233                 return NULL;
6234         }
6235
6236         fcport = qlt_get_port_database(vha, loop_id);
6237         if (!fcport) {
6238                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6239                 return NULL;
6240         }
6241
6242         if (global_resets !=
6243             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6244                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6245                     "qla_target(%d): global reset during session discovery "
6246                     "(counter was %d, new %d), retrying", vha->vp_idx,
6247                     global_resets,
6248                     atomic_read(&vha->vha_tgt.
6249                         qla_tgt->tgt_global_resets_count));
6250                 goto retry;
6251         }
6252
6253         sess = qlt_create_sess(vha, fcport, true);
6254
6255         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6256
6257         return sess;
6258 }
6259
6260 static void qlt_abort_work(struct qla_tgt *tgt,
6261         struct qla_tgt_sess_work_param *prm)
6262 {
6263         struct scsi_qla_host *vha = tgt->vha;
6264         struct qla_hw_data *ha = vha->hw;
6265         struct fc_port *sess = NULL;
6266         unsigned long flags = 0, flags2 = 0;
6267         be_id_t s_id;
6268         int rc;
6269
6270         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6271
6272         if (tgt->tgt_stop)
6273                 goto out_term2;
6274
6275         s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6276
6277         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6278         if (!sess) {
6279                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6280
6281                 sess = qlt_make_local_sess(vha, s_id);
6282                 /* sess has got an extra creation ref */
6283
6284                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6285                 if (!sess)
6286                         goto out_term2;
6287         } else {
6288                 if (sess->deleted) {
6289                         sess = NULL;
6290                         goto out_term2;
6291                 }
6292
6293                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6294                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6295                             "%s: kref_get fail %8phC \n",
6296                              __func__, sess->port_name);
6297                         sess = NULL;
6298                         goto out_term2;
6299                 }
6300         }
6301
6302         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6303         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6304
6305         ha->tgt.tgt_ops->put_sess(sess);
6306
6307         if (rc != 0)
6308                 goto out_term;
6309         return;
6310
6311 out_term2:
6312         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6313
6314 out_term:
6315         spin_lock_irqsave(&ha->hardware_lock, flags);
6316         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6317             FCP_TMF_REJECTED, false);
6318         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6319 }
6320
6321 static void qlt_sess_work_fn(struct work_struct *work)
6322 {
6323         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6324         struct scsi_qla_host *vha = tgt->vha;
6325         unsigned long flags;
6326
6327         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6328
6329         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6330         while (!list_empty(&tgt->sess_works_list)) {
6331                 struct qla_tgt_sess_work_param *prm = list_entry(
6332                     tgt->sess_works_list.next, typeof(*prm),
6333                     sess_works_list_entry);
6334
6335                 /*
6336                  * This work can be scheduled on several CPUs at time, so we
6337                  * must delete the entry to eliminate double processing
6338                  */
6339                 list_del(&prm->sess_works_list_entry);
6340
6341                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6342
6343                 switch (prm->type) {
6344                 case QLA_TGT_SESS_WORK_ABORT:
6345                         qlt_abort_work(tgt, prm);
6346                         break;
6347                 default:
6348                         BUG_ON(1);
6349                         break;
6350                 }
6351
6352                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6353
6354                 kfree(prm);
6355         }
6356         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6357 }
6358
6359 /* Must be called under tgt_host_action_mutex */
6360 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6361 {
6362         struct qla_tgt *tgt;
6363         int rc, i;
6364         struct qla_qpair_hint *h;
6365
6366         if (!QLA_TGT_MODE_ENABLED())
6367                 return 0;
6368
6369         if (!IS_TGT_MODE_CAPABLE(ha)) {
6370                 ql_log(ql_log_warn, base_vha, 0xe070,
6371                     "This adapter does not support target mode.\n");
6372                 return 0;
6373         }
6374
6375         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6376             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6377
6378         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6379
6380         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6381         if (!tgt) {
6382                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6383                     "Unable to allocate struct qla_tgt\n");
6384                 return -ENOMEM;
6385         }
6386
6387         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6388                                sizeof(struct qla_qpair_hint),
6389                                GFP_KERNEL);
6390         if (!tgt->qphints) {
6391                 kfree(tgt);
6392                 ql_log(ql_log_warn, base_vha, 0x0197,
6393                     "Unable to allocate qpair hints.\n");
6394                 return -ENOMEM;
6395         }
6396
6397         qla2xxx_driver_template.supported_mode |= MODE_TARGET;
6398
6399         rc = btree_init64(&tgt->lun_qpair_map);
6400         if (rc) {
6401                 kfree(tgt->qphints);
6402                 kfree(tgt);
6403                 ql_log(ql_log_info, base_vha, 0x0198,
6404                         "Unable to initialize lun_qpair_map btree\n");
6405                 return -EIO;
6406         }
6407         h = &tgt->qphints[0];
6408         h->qpair = ha->base_qpair;
6409         INIT_LIST_HEAD(&h->hint_elem);
6410         h->cpuid = ha->base_qpair->cpuid;
6411         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6412
6413         for (i = 0; i < ha->max_qpairs; i++) {
6414                 unsigned long flags;
6415
6416                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6417
6418                 h = &tgt->qphints[i + 1];
6419                 INIT_LIST_HEAD(&h->hint_elem);
6420                 if (qpair) {
6421                         h->qpair = qpair;
6422                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6423                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6424                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6425                         h->cpuid = qpair->cpuid;
6426                 }
6427         }
6428
6429         tgt->ha = ha;
6430         tgt->vha = base_vha;
6431         init_waitqueue_head(&tgt->waitQ);
6432         spin_lock_init(&tgt->sess_work_lock);
6433         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6434         INIT_LIST_HEAD(&tgt->sess_works_list);
6435         atomic_set(&tgt->tgt_global_resets_count, 0);
6436
6437         base_vha->vha_tgt.qla_tgt = tgt;
6438
6439         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6440                 "qla_target(%d): using 64 Bit PCI addressing",
6441                 base_vha->vp_idx);
6442         /* 3 is reserved */
6443         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6444
6445         mutex_lock(&qla_tgt_mutex);
6446         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6447         mutex_unlock(&qla_tgt_mutex);
6448
6449         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6450                 ha->tgt.tgt_ops->add_target(base_vha);
6451
6452         return 0;
6453 }
6454
6455 /* Must be called under tgt_host_action_mutex */
6456 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6457 {
6458         if (!vha->vha_tgt.qla_tgt)
6459                 return 0;
6460
6461         if (vha->fc_vport) {
6462                 qlt_release(vha->vha_tgt.qla_tgt);
6463                 return 0;
6464         }
6465
6466         /* free left over qfull cmds */
6467         qlt_init_term_exchange(vha);
6468
6469         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6470             vha->host_no, ha);
6471         qlt_release(vha->vha_tgt.qla_tgt);
6472
6473         return 0;
6474 }
6475
6476 void qla_remove_hostmap(struct qla_hw_data *ha)
6477 {
6478         struct scsi_qla_host *node;
6479         u32 key = 0;
6480
6481         btree_for_each_safe32(&ha->host_map, key, node)
6482                 btree_remove32(&ha->host_map, key);
6483
6484         btree_destroy32(&ha->host_map);
6485 }
6486
6487 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6488         unsigned char *b)
6489 {
6490         pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6491         pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6492         put_unaligned_be64(wwpn, b);
6493         pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6494 }
6495
6496 /**
6497  * qlt_lport_register - register lport with external module
6498  *
6499  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6500  * @phys_wwpn: physical port WWPN
6501  * @npiv_wwpn: NPIV WWPN
6502  * @npiv_wwnn: NPIV WWNN
6503  * @callback:  lport initialization callback for tcm_qla2xxx code
6504  */
6505 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6506                        u64 npiv_wwpn, u64 npiv_wwnn,
6507                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6508 {
6509         struct qla_tgt *tgt;
6510         struct scsi_qla_host *vha;
6511         struct qla_hw_data *ha;
6512         struct Scsi_Host *host;
6513         unsigned long flags;
6514         int rc;
6515         u8 b[WWN_SIZE];
6516
6517         mutex_lock(&qla_tgt_mutex);
6518         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6519                 vha = tgt->vha;
6520                 ha = vha->hw;
6521
6522                 host = vha->host;
6523                 if (!host)
6524                         continue;
6525
6526                 if (!(host->hostt->supported_mode & MODE_TARGET))
6527                         continue;
6528
6529                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6530                         continue;
6531
6532                 spin_lock_irqsave(&ha->hardware_lock, flags);
6533                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6534                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6535                             host->host_no);
6536                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6537                         continue;
6538                 }
6539                 if (tgt->tgt_stop) {
6540                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6541                                  host->host_no);
6542                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6543                         continue;
6544                 }
6545                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6546
6547                 if (!scsi_host_get(host)) {
6548                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6549                             "Unable to scsi_host_get() for"
6550                             " qla2xxx scsi_host\n");
6551                         continue;
6552                 }
6553                 qlt_lport_dump(vha, phys_wwpn, b);
6554
6555                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6556                         scsi_host_put(host);
6557                         continue;
6558                 }
6559                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6560                 if (rc != 0)
6561                         scsi_host_put(host);
6562
6563                 mutex_unlock(&qla_tgt_mutex);
6564                 return rc;
6565         }
6566         mutex_unlock(&qla_tgt_mutex);
6567
6568         return -ENODEV;
6569 }
6570 EXPORT_SYMBOL(qlt_lport_register);
6571
6572 /**
6573  * qlt_lport_deregister - Degister lport
6574  *
6575  * @vha:  Registered scsi_qla_host pointer
6576  */
6577 void qlt_lport_deregister(struct scsi_qla_host *vha)
6578 {
6579         struct qla_hw_data *ha = vha->hw;
6580         struct Scsi_Host *sh = vha->host;
6581         /*
6582          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6583          */
6584         vha->vha_tgt.target_lport_ptr = NULL;
6585         ha->tgt.tgt_ops = NULL;
6586         /*
6587          * Release the Scsi_Host reference for the underlying qla2xxx host
6588          */
6589         scsi_host_put(sh);
6590 }
6591 EXPORT_SYMBOL(qlt_lport_deregister);
6592
6593 /* Must be called under HW lock */
6594 void qlt_set_mode(struct scsi_qla_host *vha)
6595 {
6596         switch (vha->qlini_mode) {
6597         case QLA2XXX_INI_MODE_DISABLED:
6598         case QLA2XXX_INI_MODE_EXCLUSIVE:
6599                 vha->host->active_mode = MODE_TARGET;
6600                 break;
6601         case QLA2XXX_INI_MODE_ENABLED:
6602                 vha->host->active_mode = MODE_INITIATOR;
6603                 break;
6604         case QLA2XXX_INI_MODE_DUAL:
6605                 vha->host->active_mode = MODE_DUAL;
6606                 break;
6607         default:
6608                 break;
6609         }
6610 }
6611
6612 /* Must be called under HW lock */
6613 static void qlt_clear_mode(struct scsi_qla_host *vha)
6614 {
6615         switch (vha->qlini_mode) {
6616         case QLA2XXX_INI_MODE_DISABLED:
6617                 vha->host->active_mode = MODE_UNKNOWN;
6618                 break;
6619         case QLA2XXX_INI_MODE_EXCLUSIVE:
6620                 vha->host->active_mode = MODE_INITIATOR;
6621                 break;
6622         case QLA2XXX_INI_MODE_ENABLED:
6623         case QLA2XXX_INI_MODE_DUAL:
6624                 vha->host->active_mode = MODE_INITIATOR;
6625                 break;
6626         default:
6627                 break;
6628         }
6629 }
6630
6631 /*
6632  * qla_tgt_enable_vha - NO LOCK HELD
6633  *
6634  * host_reset, bring up w/ Target Mode Enabled
6635  */
6636 void
6637 qlt_enable_vha(struct scsi_qla_host *vha)
6638 {
6639         struct qla_hw_data *ha = vha->hw;
6640         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6641         unsigned long flags;
6642         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6643
6644         if (!tgt) {
6645                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6646                     "Unable to locate qla_tgt pointer from"
6647                     " struct qla_hw_data\n");
6648                 dump_stack();
6649                 return;
6650         }
6651         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6652                 return;
6653
6654         if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6655                 ha->tgt.num_act_qpairs = ha->max_qpairs;
6656         spin_lock_irqsave(&ha->hardware_lock, flags);
6657         tgt->tgt_stopped = 0;
6658         qlt_set_mode(vha);
6659         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6660
6661         mutex_lock(&ha->optrom_mutex);
6662         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6663             "%s.\n", __func__);
6664         if (vha->vp_idx) {
6665                 qla24xx_disable_vp(vha);
6666                 qla24xx_enable_vp(vha);
6667         } else {
6668                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6669                 qla2xxx_wake_dpc(base_vha);
6670                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6671                              QLA_SUCCESS);
6672         }
6673         mutex_unlock(&ha->optrom_mutex);
6674 }
6675 EXPORT_SYMBOL(qlt_enable_vha);
6676
6677 /*
6678  * qla_tgt_disable_vha - NO LOCK HELD
6679  *
6680  * Disable Target Mode and reset the adapter
6681  */
6682 static void qlt_disable_vha(struct scsi_qla_host *vha)
6683 {
6684         struct qla_hw_data *ha = vha->hw;
6685         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6686         unsigned long flags;
6687
6688         if (!tgt) {
6689                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6690                     "Unable to locate qla_tgt pointer from"
6691                     " struct qla_hw_data\n");
6692                 dump_stack();
6693                 return;
6694         }
6695
6696         spin_lock_irqsave(&ha->hardware_lock, flags);
6697         qlt_clear_mode(vha);
6698         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6699
6700         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6701         qla2xxx_wake_dpc(vha);
6702
6703         /*
6704          * We are expecting the offline state.
6705          * QLA_FUNCTION_FAILED means that adapter is offline.
6706          */
6707         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6708                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6709                        "adapter is offline\n");
6710 }
6711
6712 /*
6713  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6714  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6715  * members.
6716  */
6717 void
6718 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6719 {
6720         vha->vha_tgt.qla_tgt = NULL;
6721
6722         mutex_init(&vha->vha_tgt.tgt_mutex);
6723         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6724
6725         INIT_LIST_HEAD(&vha->unknown_atio_list);
6726         INIT_DELAYED_WORK(&vha->unknown_atio_work, qlt_unknown_atio_work_fn);
6727
6728         qlt_clear_mode(vha);
6729
6730         /*
6731          * NOTE: Currently the value is kept the same for <24xx and
6732          * >=24xx ISPs. If it is necessary to change it,
6733          * the check should be added for specific ISPs,
6734          * assigning the value appropriately.
6735          */
6736         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6737
6738         qlt_add_target(ha, vha);
6739 }
6740
6741 u8
6742 qlt_rff_id(struct scsi_qla_host *vha)
6743 {
6744         u8 fc4_feature = 0;
6745         /*
6746          * FC-4 Feature bit 0 indicates target functionality to the name server.
6747          */
6748         if (qla_tgt_mode_enabled(vha)) {
6749                 fc4_feature = BIT_0;
6750         } else if (qla_ini_mode_enabled(vha)) {
6751                 fc4_feature = BIT_1;
6752         } else if (qla_dual_mode_enabled(vha))
6753                 fc4_feature = BIT_0 | BIT_1;
6754
6755         return fc4_feature;
6756 }
6757
6758 /*
6759  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6760  * @ha: HA context
6761  *
6762  * Beginning of ATIO ring has initialization control block already built
6763  * by nvram config routine.
6764  *
6765  * Returns 0 on success.
6766  */
6767 void
6768 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6769 {
6770         struct qla_hw_data *ha = vha->hw;
6771         uint16_t cnt;
6772         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6773
6774         if (qla_ini_mode_enabled(vha))
6775                 return;
6776
6777         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6778                 pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6779                 pkt++;
6780         }
6781
6782 }
6783
6784 /*
6785  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6786  * @ha: SCSI driver HA context
6787  */
6788 void
6789 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6790 {
6791         struct qla_hw_data *ha = vha->hw;
6792         struct atio_from_isp *pkt;
6793         int cnt, i;
6794
6795         if (!ha->flags.fw_started)
6796                 return;
6797
6798         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6799             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6800                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6801                 cnt = pkt->u.raw.entry_count;
6802
6803                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6804                         /*
6805                          * This packet is corrupted. The header + payload
6806                          * can not be trusted. There is no point in passing
6807                          * it further up.
6808                          */
6809                         ql_log(ql_log_warn, vha, 0xd03c,
6810                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6811                             &pkt->u.isp24.fcp_hdr.s_id,
6812                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6813                             pkt->u.isp24.exchange_addr, pkt);
6814
6815                         adjust_corrupted_atio(pkt);
6816                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6817                             ha_locked, 0);
6818                 } else {
6819                         qlt_24xx_atio_pkt_all_vps(vha,
6820                             (struct atio_from_isp *)pkt, ha_locked);
6821                 }
6822
6823                 for (i = 0; i < cnt; i++) {
6824                         ha->tgt.atio_ring_index++;
6825                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6826                                 ha->tgt.atio_ring_index = 0;
6827                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6828                         } else
6829                                 ha->tgt.atio_ring_ptr++;
6830
6831                         pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6832                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6833                 }
6834                 wmb();
6835         }
6836
6837         /* Adjust ring index */
6838         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6839 }
6840
6841 void
6842 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6843 {
6844         struct qla_hw_data *ha = vha->hw;
6845         struct qla_msix_entry *msix = &ha->msix_entries[2];
6846         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6847
6848         if (!QLA_TGT_MODE_ENABLED())
6849                 return;
6850
6851         wrt_reg_dword(ISP_ATIO_Q_IN(vha), 0);
6852         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), 0);
6853         rd_reg_dword(ISP_ATIO_Q_OUT(vha));
6854
6855         if (ha->flags.msix_enabled) {
6856                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6857                         icb->msix_atio = cpu_to_le16(msix->entry);
6858                         icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
6859                         ql_dbg(ql_dbg_init, vha, 0xf072,
6860                             "Registering ICB vector 0x%x for atio que.\n",
6861                             msix->entry);
6862                 }
6863         } else {
6864                 /* INTx|MSI */
6865                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6866                         icb->msix_atio = 0;
6867                         icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6868                         ql_dbg(ql_dbg_init, vha, 0xf072,
6869                             "%s: Use INTx for ATIOQ.\n", __func__);
6870                 }
6871         }
6872 }
6873
6874 void
6875 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6876 {
6877         struct qla_hw_data *ha = vha->hw;
6878         u32 tmp;
6879
6880         if (!QLA_TGT_MODE_ENABLED())
6881                 return;
6882
6883         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6884                 if (!ha->tgt.saved_set) {
6885                         /* We save only once */
6886                         ha->tgt.saved_exchange_count = nv->exchange_count;
6887                         ha->tgt.saved_firmware_options_1 =
6888                             nv->firmware_options_1;
6889                         ha->tgt.saved_firmware_options_2 =
6890                             nv->firmware_options_2;
6891                         ha->tgt.saved_firmware_options_3 =
6892                             nv->firmware_options_3;
6893                         ha->tgt.saved_set = 1;
6894                 }
6895
6896                 if (qla_tgt_mode_enabled(vha))
6897                         nv->exchange_count = cpu_to_le16(0xFFFF);
6898                 else                    /* dual */
6899                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6900
6901                 /* Enable target mode */
6902                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6903
6904                 /* Disable ini mode, if requested */
6905                 if (qla_tgt_mode_enabled(vha))
6906                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6907
6908                 /* Disable Full Login after LIP */
6909                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6910                 /* Enable initial LIP */
6911                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6912                 if (ql2xtgt_tape_enable)
6913                         /* Enable FC Tape support */
6914                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6915                 else
6916                         /* Disable FC Tape support */
6917                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6918
6919                 /* Disable Full Login after LIP */
6920                 nv->host_p &= cpu_to_le32(~BIT_10);
6921
6922                 /*
6923                  * clear BIT 15 explicitly as we have seen at least
6924                  * a couple of instances where this was set and this
6925                  * was causing the firmware to not be initialized.
6926                  */
6927                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6928                 /* Enable target PRLI control */
6929                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6930
6931                 if (IS_QLA25XX(ha)) {
6932                         /* Change Loop-prefer to Pt-Pt */
6933                         tmp = ~(BIT_4|BIT_5|BIT_6);
6934                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6935                         tmp = P2P << 4;
6936                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6937                 }
6938         } else {
6939                 if (ha->tgt.saved_set) {
6940                         nv->exchange_count = ha->tgt.saved_exchange_count;
6941                         nv->firmware_options_1 =
6942                             ha->tgt.saved_firmware_options_1;
6943                         nv->firmware_options_2 =
6944                             ha->tgt.saved_firmware_options_2;
6945                         nv->firmware_options_3 =
6946                             ha->tgt.saved_firmware_options_3;
6947                 }
6948                 return;
6949         }
6950
6951         if (ha->base_qpair->enable_class_2) {
6952                 if (vha->flags.init_done)
6953                         fc_host_supported_classes(vha->host) =
6954                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6955
6956                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6957         } else {
6958                 if (vha->flags.init_done)
6959                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6960
6961                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6962         }
6963 }
6964
6965 void
6966 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6967         struct init_cb_24xx *icb)
6968 {
6969         struct qla_hw_data *ha = vha->hw;
6970
6971         if (!QLA_TGT_MODE_ENABLED())
6972                 return;
6973
6974         if (ha->tgt.node_name_set) {
6975                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6976                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6977         }
6978 }
6979
6980 void
6981 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6982 {
6983         struct qla_hw_data *ha = vha->hw;
6984         u32 tmp;
6985
6986         if (!QLA_TGT_MODE_ENABLED())
6987                 return;
6988
6989         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6990                 if (!ha->tgt.saved_set) {
6991                         /* We save only once */
6992                         ha->tgt.saved_exchange_count = nv->exchange_count;
6993                         ha->tgt.saved_firmware_options_1 =
6994                             nv->firmware_options_1;
6995                         ha->tgt.saved_firmware_options_2 =
6996                             nv->firmware_options_2;
6997                         ha->tgt.saved_firmware_options_3 =
6998                             nv->firmware_options_3;
6999                         ha->tgt.saved_set = 1;
7000                 }
7001
7002                 if (qla_tgt_mode_enabled(vha))
7003                         nv->exchange_count = cpu_to_le16(0xFFFF);
7004                 else                    /* dual */
7005                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
7006
7007                 /* Enable target mode */
7008                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
7009
7010                 /* Disable ini mode, if requested */
7011                 if (qla_tgt_mode_enabled(vha))
7012                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
7013                 /* Disable Full Login after LIP */
7014                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7015                 /* Enable initial LIP */
7016                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7017                 /*
7018                  * clear BIT 15 explicitly as we have seen at
7019                  * least a couple of instances where this was set
7020                  * and this was causing the firmware to not be
7021                  * initialized.
7022                  */
7023                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7024                 if (ql2xtgt_tape_enable)
7025                         /* Enable FC tape support */
7026                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7027                 else
7028                         /* Disable FC tape support */
7029                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7030
7031                 /* Disable Full Login after LIP */
7032                 nv->host_p &= cpu_to_le32(~BIT_10);
7033                 /* Enable target PRLI control */
7034                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7035
7036                 /* Change Loop-prefer to Pt-Pt */
7037                 tmp = ~(BIT_4|BIT_5|BIT_6);
7038                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7039                 tmp = P2P << 4;
7040                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7041         } else {
7042                 if (ha->tgt.saved_set) {
7043                         nv->exchange_count = ha->tgt.saved_exchange_count;
7044                         nv->firmware_options_1 =
7045                             ha->tgt.saved_firmware_options_1;
7046                         nv->firmware_options_2 =
7047                             ha->tgt.saved_firmware_options_2;
7048                         nv->firmware_options_3 =
7049                             ha->tgt.saved_firmware_options_3;
7050                 }
7051                 return;
7052         }
7053
7054         if (ha->base_qpair->enable_class_2) {
7055                 if (vha->flags.init_done)
7056                         fc_host_supported_classes(vha->host) =
7057                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7058
7059                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7060         } else {
7061                 if (vha->flags.init_done)
7062                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7063
7064                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7065         }
7066 }
7067
7068 void
7069 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7070         struct init_cb_81xx *icb)
7071 {
7072         struct qla_hw_data *ha = vha->hw;
7073
7074         if (!QLA_TGT_MODE_ENABLED())
7075                 return;
7076
7077         if (ha->tgt.node_name_set) {
7078                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7079                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7080         }
7081 }
7082
7083 void
7084 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7085 {
7086         if (!QLA_TGT_MODE_ENABLED())
7087                 return;
7088
7089         ha->msix_count += 1; /* For ATIO Q */
7090 }
7091
7092
7093 void
7094 qlt_modify_vp_config(struct scsi_qla_host *vha,
7095         struct vp_config_entry_24xx *vpmod)
7096 {
7097         /* enable target mode.  Bit5 = 1 => disable */
7098         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7099                 vpmod->options_idx1 &= ~BIT_5;
7100
7101         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7102         if (qla_tgt_mode_enabled(vha))
7103                 vpmod->options_idx1 &= ~BIT_4;
7104 }
7105
7106 void
7107 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7108 {
7109         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7110         if (!QLA_TGT_MODE_ENABLED())
7111                 return;
7112
7113         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
7114                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7115                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7116         } else {
7117                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7118                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7119         }
7120
7121         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7122
7123         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7124         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7125             qlt_unknown_atio_work_fn);
7126
7127         qlt_clear_mode(base_vha);
7128
7129         qla_update_vp_map(base_vha, SET_VP_IDX);
7130 }
7131
7132 irqreturn_t
7133 qla83xx_msix_atio_q(int irq, void *dev_id)
7134 {
7135         struct rsp_que *rsp;
7136         scsi_qla_host_t *vha;
7137         struct qla_hw_data *ha;
7138         unsigned long flags;
7139
7140         rsp = (struct rsp_que *) dev_id;
7141         ha = rsp->hw;
7142         vha = pci_get_drvdata(ha->pdev);
7143
7144         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7145
7146         qlt_24xx_process_atio_queue(vha, 0);
7147
7148         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7149
7150         return IRQ_HANDLED;
7151 }
7152
7153 static void
7154 qlt_handle_abts_recv_work(struct work_struct *work)
7155 {
7156         struct qla_tgt_sess_op *op = container_of(work,
7157                 struct qla_tgt_sess_op, work);
7158         scsi_qla_host_t *vha = op->vha;
7159         struct qla_hw_data *ha = vha->hw;
7160         unsigned long flags;
7161
7162         if (qla2x00_reset_active(vha) ||
7163             (op->chip_reset != ha->base_qpair->chip_reset))
7164                 return;
7165
7166         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7167         qlt_24xx_process_atio_queue(vha, 0);
7168         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7169
7170         spin_lock_irqsave(&ha->hardware_lock, flags);
7171         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7172         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7173
7174         kfree(op);
7175 }
7176
7177 void
7178 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7179     response_t *pkt)
7180 {
7181         struct qla_tgt_sess_op *op;
7182
7183         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7184
7185         if (!op) {
7186                 /* do not reach for ATIO queue here.  This is best effort err
7187                  * recovery at this point.
7188                  */
7189                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7190                 return;
7191         }
7192
7193         memcpy(&op->atio, pkt, sizeof(*pkt));
7194         op->vha = vha;
7195         op->chip_reset = vha->hw->base_qpair->chip_reset;
7196         op->rsp = rsp;
7197         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7198         queue_work(qla_tgt_wq, &op->work);
7199         return;
7200 }
7201
7202 int
7203 qlt_mem_alloc(struct qla_hw_data *ha)
7204 {
7205         if (!QLA_TGT_MODE_ENABLED())
7206                 return 0;
7207
7208         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7209             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7210             &ha->tgt.atio_dma, GFP_KERNEL);
7211         if (!ha->tgt.atio_ring) {
7212                 return -ENOMEM;
7213         }
7214         return 0;
7215 }
7216
7217 void
7218 qlt_mem_free(struct qla_hw_data *ha)
7219 {
7220         if (!QLA_TGT_MODE_ENABLED())
7221                 return;
7222
7223         if (ha->tgt.atio_ring) {
7224                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7225                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7226                     ha->tgt.atio_dma);
7227         }
7228         ha->tgt.atio_ring = NULL;
7229         ha->tgt.atio_dma = 0;
7230 }
7231
7232 static int __init qlt_parse_ini_mode(void)
7233 {
7234         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7235                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7236         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7237                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7238         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7239                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7240         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7241                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7242         else
7243                 return false;
7244
7245         return true;
7246 }
7247
7248 int __init qlt_init(void)
7249 {
7250         int ret;
7251
7252         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7253         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7254
7255         if (!qlt_parse_ini_mode()) {
7256                 ql_log(ql_log_fatal, NULL, 0xe06b,
7257                     "qlt_parse_ini_mode() failed\n");
7258                 return -EINVAL;
7259         }
7260
7261         if (!QLA_TGT_MODE_ENABLED())
7262                 return 0;
7263
7264         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7265             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7266             qla_tgt_mgmt_cmd), 0, NULL);
7267         if (!qla_tgt_mgmt_cmd_cachep) {
7268                 ql_log(ql_log_fatal, NULL, 0xd04b,
7269                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7270                 return -ENOMEM;
7271         }
7272
7273         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7274             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7275             0, NULL);
7276
7277         if (!qla_tgt_plogi_cachep) {
7278                 ql_log(ql_log_fatal, NULL, 0xe06d,
7279                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7280                 ret = -ENOMEM;
7281                 goto out_mgmt_cmd_cachep;
7282         }
7283
7284         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7285             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7286         if (!qla_tgt_mgmt_cmd_mempool) {
7287                 ql_log(ql_log_fatal, NULL, 0xe06e,
7288                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7289                 ret = -ENOMEM;
7290                 goto out_plogi_cachep;
7291         }
7292
7293         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7294         if (!qla_tgt_wq) {
7295                 ql_log(ql_log_fatal, NULL, 0xe06f,
7296                     "alloc_workqueue for qla_tgt_wq failed\n");
7297                 ret = -ENOMEM;
7298                 goto out_cmd_mempool;
7299         }
7300         /*
7301          * Return 1 to signal that initiator-mode is being disabled
7302          */
7303         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7304
7305 out_cmd_mempool:
7306         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7307 out_plogi_cachep:
7308         kmem_cache_destroy(qla_tgt_plogi_cachep);
7309 out_mgmt_cmd_cachep:
7310         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7311         return ret;
7312 }
7313
7314 void qlt_exit(void)
7315 {
7316         if (!QLA_TGT_MODE_ENABLED())
7317                 return;
7318
7319         destroy_workqueue(qla_tgt_wq);
7320         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7321         kmem_cache_destroy(qla_tgt_plogi_cachep);
7322         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7323 }