drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"enabled\" (default) - initiator mode will always stay enabled.");
  59
  60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  61
  62 static int temp_sam_status = SAM_STAT_BUSY;
  63
  64 /*
  65  * From scsi/fc/fc_fcp.h
  66  */
  67 enum fcp_resp_rsp_codes {
  68         FCP_TMF_CMPL = 0,
  69         FCP_DATA_LEN_INVALID = 1,
  70         FCP_CMND_FIELDS_INVALID = 2,
  71         FCP_DATA_PARAM_MISMATCH = 3,
  72         FCP_TMF_REJECTED = 4,
  73         FCP_TMF_FAILED = 5,
  74         FCP_TMF_INVALID_LUN = 9,
  75 };
  76
  77 /*
  78  * fc_pri_ta from scsi/fc/fc_fcp.h
  79  */
  80 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  81 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  82 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  83 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  84 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  85 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  86 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  87
  88 /*
  89  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  90  * must be called under HW lock and could unlock/lock it inside.
  91  * It isn't an issue, since in the current implementation on the time when
  92  * those functions are called:
  93  *
  94  *   - Either context is IRQ and only IRQ handler can modify HW data,
  95  *     including rings related fields,
  96  *
  97  *   - Or access to target mode variables from struct qla_tgt doesn't
  98  *     cross those functions boundaries, except tgt_stop, which
  99  *     additionally protected by irq_cmd_count.
 100  */
 101 /* Predefs for callbacks handed to qla2xxx LLD */
 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 103         struct atio_from_isp *pkt);
 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
 106         int fn, void *iocb, int flags);
 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 108         *cmd, struct atio_from_isp *atio, int ha_locked);
 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 110         struct qla_tgt_srr_imm *imm, int ha_lock);
 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
 112         struct qla_tgt_cmd *cmd);
 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 114         struct atio_from_isp *atio, uint16_t status, int qfull);
 115 static void qlt_disable_vha(struct scsi_qla_host *vha);
 116 /*
 117  * Global Variables
 118  */
 119 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 120 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 121 static struct workqueue_struct *qla_tgt_wq;
 122 static DEFINE_MUTEX(qla_tgt_mutex);
 123 static LIST_HEAD(qla_tgt_glist);
 124
 125 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 126 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 127         struct qla_tgt *tgt,
 128         const uint8_t *port_name)
 129 {
 130         struct qla_tgt_sess *sess;
 131
 132         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 133                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 134                         return sess;
 135         }
 136
 137         return NULL;
 138 }
 139
 140 /* Might release hw lock, then reaquire!! */
 141 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 142 {
 143         /* Send marker if required */
 144         if (unlikely(vha->marker_needed != 0)) {
 145                 int rc = qla2x00_issue_marker(vha, vha_locked);
 146                 if (rc != QLA_SUCCESS) {
 147                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 148                             "qla_target(%d): issue_marker() failed\n",
 149                             vha->vp_idx);
 150                 }
 151                 return rc;
 152         }
 153         return QLA_SUCCESS;
 154 }
 155
 156 static inline
 157 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 158         uint8_t *d_id)
 159 {
 160         struct qla_hw_data *ha = vha->hw;
 161         uint8_t vp_idx;
 162
 163         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 164                 return NULL;
 165
 166         if (vha->d_id.b.al_pa == d_id[2])
 167                 return vha;
 168
 169         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 170         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 171         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 172                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 173
 174         return NULL;
 175 }
 176
 177 static inline
 178 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 179         uint16_t vp_idx)
 180 {
 181         struct qla_hw_data *ha = vha->hw;
 182
 183         if (vha->vp_idx == vp_idx)
 184                 return vha;
 185
 186         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 187         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 188                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 189
 190         return NULL;
 191 }
 192
 193 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 194 {
 195         unsigned long flags;
 196
 197         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 198
 199         vha->hw->tgt.num_pend_cmds++;
 200         if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
 201                 vha->hw->qla_stats.stat_max_pend_cmds =
 202                         vha->hw->tgt.num_pend_cmds;
 203         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 204 }
 205 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 206 {
 207         unsigned long flags;
 208
 209         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 210         vha->hw->tgt.num_pend_cmds--;
 211         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 212 }
 213
 214 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 215         struct atio_from_isp *atio)
 216 {
 217         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 218                 "%s: qla_target(%d): type %x ox_id %04x\n",
 219                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 220                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 221
 222         switch (atio->u.raw.entry_type) {
 223         case ATIO_TYPE7:
 224         {
 225                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 226                     atio->u.isp24.fcp_hdr.d_id);
 227                 if (unlikely(NULL == host)) {
 228                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 229                             "qla_target(%d): Received ATIO_TYPE7 "
 230                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 231                             atio->u.isp24.fcp_hdr.d_id[0],
 232                             atio->u.isp24.fcp_hdr.d_id[1],
 233                             atio->u.isp24.fcp_hdr.d_id[2]);
 234                         break;
 235                 }
 236                 qlt_24xx_atio_pkt(host, atio);
 237                 break;
 238         }
 239
 240         case IMMED_NOTIFY_TYPE:
 241         {
 242                 struct scsi_qla_host *host = vha;
 243                 struct imm_ntfy_from_isp *entry =
 244                     (struct imm_ntfy_from_isp *)atio;
 245
 246                 if ((entry->u.isp24.vp_index != 0xFF) &&
 247                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 248                         host = qlt_find_host_by_vp_idx(vha,
 249                             entry->u.isp24.vp_index);
 250                         if (unlikely(!host)) {
 251                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 252                                     "qla_target(%d): Received "
 253                                     "ATIO (IMMED_NOTIFY_TYPE) "
 254                                     "with unknown vp_index %d\n",
 255                                     vha->vp_idx, entry->u.isp24.vp_index);
 256                                 break;
 257                         }
 258                 }
 259                 qlt_24xx_atio_pkt(host, atio);
 260                 break;
 261         }
 262
 263         default:
 264                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 265                     "qla_target(%d): Received unknown ATIO atio "
 266                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 267                 break;
 268         }
 269
 270         return;
 271 }
 272
 273 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 274 {
 275         switch (pkt->entry_type) {
 276         case CTIO_CRC2:
 277                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 278                         "qla_target(%d):%s: CRC2 Response pkt\n",
 279                         vha->vp_idx, __func__);
 280         case CTIO_TYPE7:
 281         {
 282                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 283                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 284                     entry->vp_index);
 285                 if (unlikely(!host)) {
 286                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 287                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 288                             "received, with unknown vp_index %d\n",
 289                             vha->vp_idx, entry->vp_index);
 290                         break;
 291                 }
 292                 qlt_response_pkt(host, pkt);
 293                 break;
 294         }
 295
 296         case IMMED_NOTIFY_TYPE:
 297         {
 298                 struct scsi_qla_host *host = vha;
 299                 struct imm_ntfy_from_isp *entry =
 300                     (struct imm_ntfy_from_isp *)pkt;
 301
 302                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 303                 if (unlikely(!host)) {
 304                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 305                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 306                             "received, with unknown vp_index %d\n",
 307                             vha->vp_idx, entry->u.isp24.vp_index);
 308                         break;
 309                 }
 310                 qlt_response_pkt(host, pkt);
 311                 break;
 312         }
 313
 314         case NOTIFY_ACK_TYPE:
 315         {
 316                 struct scsi_qla_host *host = vha;
 317                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 318
 319                 if (0xFF != entry->u.isp24.vp_index) {
 320                         host = qlt_find_host_by_vp_idx(vha,
 321                             entry->u.isp24.vp_index);
 322                         if (unlikely(!host)) {
 323                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 324                                     "qla_target(%d): Response "
 325                                     "pkt (NOTIFY_ACK_TYPE) "
 326                                     "received, with unknown "
 327                                     "vp_index %d\n", vha->vp_idx,
 328                                     entry->u.isp24.vp_index);
 329                                 break;
 330                         }
 331                 }
 332                 qlt_response_pkt(host, pkt);
 333                 break;
 334         }
 335
 336         case ABTS_RECV_24XX:
 337         {
 338                 struct abts_recv_from_24xx *entry =
 339                     (struct abts_recv_from_24xx *)pkt;
 340                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 341                     entry->vp_index);
 342                 if (unlikely(!host)) {
 343                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 344                             "qla_target(%d): Response pkt "
 345                             "(ABTS_RECV_24XX) received, with unknown "
 346                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 347                         break;
 348                 }
 349                 qlt_response_pkt(host, pkt);
 350                 break;
 351         }
 352
 353         case ABTS_RESP_24XX:
 354         {
 355                 struct abts_resp_to_24xx *entry =
 356                     (struct abts_resp_to_24xx *)pkt;
 357                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 358                     entry->vp_index);
 359                 if (unlikely(!host)) {
 360                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 361                             "qla_target(%d): Response pkt "
 362                             "(ABTS_RECV_24XX) received, with unknown "
 363                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 364                         break;
 365                 }
 366                 qlt_response_pkt(host, pkt);
 367                 break;
 368         }
 369
 370         default:
 371                 qlt_response_pkt(vha, pkt);
 372                 break;
 373         }
 374
 375 }
 376
 377 static void qlt_free_session_done(struct work_struct *work)
 378 {
 379         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 380             free_work);
 381         struct qla_tgt *tgt = sess->tgt;
 382         struct scsi_qla_host *vha = sess->vha;
 383         struct qla_hw_data *ha = vha->hw;
 384
 385         BUG_ON(!tgt);
 386         /*
 387          * Release the target session for FC Nexus from fabric module code.
 388          */
 389         if (sess->se_sess != NULL)
 390                 ha->tgt.tgt_ops->free_session(sess);
 391
 392         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 393             "Unregistration of sess %p finished\n", sess);
 394
 395         kfree(sess);
 396         /*
 397          * We need to protect against race, when tgt is freed before or
 398          * inside wake_up()
 399          */
 400         tgt->sess_count--;
 401         if (tgt->sess_count == 0)
 402                 wake_up_all(&tgt->waitQ);
 403 }
 404
 405 /* ha->hardware_lock supposed to be held on entry */
 406 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 407 {
 408         struct scsi_qla_host *vha = sess->vha;
 409
 410         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 411
 412         list_del(&sess->sess_list_entry);
 413         if (sess->deleted)
 414                 list_del(&sess->del_list_entry);
 415
 416         INIT_WORK(&sess->free_work, qlt_free_session_done);
 417         schedule_work(&sess->free_work);
 418 }
 419 EXPORT_SYMBOL(qlt_unreg_sess);
 420
 421 /* ha->hardware_lock supposed to be held on entry */
 422 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 423 {
 424         struct qla_hw_data *ha = vha->hw;
 425         struct qla_tgt_sess *sess = NULL;
 426         uint32_t unpacked_lun, lun = 0;
 427         uint16_t loop_id;
 428         int res = 0;
 429         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 430         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 431
 432         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 433         if (loop_id == 0xFFFF) {
 434 #if 0 /* FIXME: Re-enable Global event handling.. */
 435                 /* Global event */
 436                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 437                 qlt_clear_tgt_db(ha->tgt.qla_tgt);
 438                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 439                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 440                             typeof(*sess), sess_list_entry);
 441                         switch (mcmd) {
 442                         case QLA_TGT_NEXUS_LOSS_SESS:
 443                                 mcmd = QLA_TGT_NEXUS_LOSS;
 444                                 break;
 445                         case QLA_TGT_ABORT_ALL_SESS:
 446                                 mcmd = QLA_TGT_ABORT_ALL;
 447                                 break;
 448                         case QLA_TGT_NEXUS_LOSS:
 449                         case QLA_TGT_ABORT_ALL:
 450                                 break;
 451                         default:
 452                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 453                                     "qla_target(%d): Not allowed "
 454                                     "command %x in %s", vha->vp_idx,
 455                                     mcmd, __func__);
 456                                 sess = NULL;
 457                                 break;
 458                         }
 459                 } else
 460                         sess = NULL;
 461 #endif
 462         } else {
 463                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 464         }
 465
 466         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 467             "Using sess for qla_tgt_reset: %p\n", sess);
 468         if (!sess) {
 469                 res = -ESRCH;
 470                 return res;
 471         }
 472
 473         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 474             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 475             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 476             mcmd, loop_id);
 477
 478         lun = a->u.isp24.fcp_cmnd.lun;
 479         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 480
 481         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 482             iocb, QLA24XX_MGMT_SEND_NACK);
 483 }
 484
 485 /* ha->hardware_lock supposed to be held on entry */
 486 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 487         bool immediate)
 488 {
 489         struct qla_tgt *tgt = sess->tgt;
 490         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 491
 492         if (sess->deleted)
 493                 return;
 494
 495         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 496             "Scheduling sess %p for deletion\n", sess);
 497         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 498         sess->deleted = 1;
 499
 500         if (immediate)
 501                 dev_loss_tmo = 0;
 502
 503         sess->expires = jiffies + dev_loss_tmo * HZ;
 504
 505         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 506             "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
 507             "deletion in %u secs (expires: %lu) immed: %d\n",
 508             sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
 509             sess->expires, immediate);
 510
 511         if (immediate)
 512                 schedule_delayed_work(&tgt->sess_del_work, 0);
 513         else
 514                 schedule_delayed_work(&tgt->sess_del_work,
 515                     sess->expires - jiffies);
 516 }
 517
 518 /* ha->hardware_lock supposed to be held on entry */
 519 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
 520 {
 521         struct qla_tgt_sess *sess;
 522
 523         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 524                 qlt_schedule_sess_for_deletion(sess, true);
 525
 526         /* At this point tgt could be already dead */
 527 }
 528
 529 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 530         uint16_t *loop_id)
 531 {
 532         struct qla_hw_data *ha = vha->hw;
 533         dma_addr_t gid_list_dma;
 534         struct gid_list_info *gid_list;
 535         char *id_iter;
 536         int res, rc, i;
 537         uint16_t entries;
 538
 539         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 540             &gid_list_dma, GFP_KERNEL);
 541         if (!gid_list) {
 542                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 543                     "qla_target(%d): DMA Alloc failed of %u\n",
 544                     vha->vp_idx, qla2x00_gid_list_size(ha));
 545                 return -ENOMEM;
 546         }
 547
 548         /* Get list of logged in devices */
 549         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 550         if (rc != QLA_SUCCESS) {
 551                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 552                     "qla_target(%d): get_id_list() failed: %x\n",
 553                     vha->vp_idx, rc);
 554                 res = -1;
 555                 goto out_free_id_list;
 556         }
 557
 558         id_iter = (char *)gid_list;
 559         res = -1;
 560         for (i = 0; i < entries; i++) {
 561                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 562                 if ((gid->al_pa == s_id[2]) &&
 563                     (gid->area == s_id[1]) &&
 564                     (gid->domain == s_id[0])) {
 565                         *loop_id = le16_to_cpu(gid->loop_id);
 566                         res = 0;
 567                         break;
 568                 }
 569                 id_iter += ha->gid_list_info_size;
 570         }
 571
 572 out_free_id_list:
 573         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 574             gid_list, gid_list_dma);
 575         return res;
 576 }
 577
 578 /* ha->hardware_lock supposed to be held on entry */
 579 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 580 {
 581         BUG_ON(!sess->deleted);
 582
 583         list_del(&sess->del_list_entry);
 584         sess->deleted = 0;
 585 }
 586
 587 static void qlt_del_sess_work_fn(struct delayed_work *work)
 588 {
 589         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 590             sess_del_work);
 591         struct scsi_qla_host *vha = tgt->vha;
 592         struct qla_hw_data *ha = vha->hw;
 593         struct qla_tgt_sess *sess;
 594         unsigned long flags, elapsed;
 595
 596         spin_lock_irqsave(&ha->hardware_lock, flags);
 597         while (!list_empty(&tgt->del_sess_list)) {
 598                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 599                     del_list_entry);
 600                 elapsed = jiffies;
 601                 if (time_after_eq(elapsed, sess->expires)) {
 602                         qlt_undelete_sess(sess);
 603
 604                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 605                             "Timeout: sess %p about to be deleted\n",
 606                             sess);
 607                         ha->tgt.tgt_ops->shutdown_sess(sess);
 608                         ha->tgt.tgt_ops->put_sess(sess);
 609                 } else {
 610                         schedule_delayed_work(&tgt->sess_del_work,
 611                             sess->expires - elapsed);
 612                         break;
 613                 }
 614         }
 615         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 616 }
 617
 618 /*
 619  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 620  * Caller must put it.
 621  */
 622 static struct qla_tgt_sess *qlt_create_sess(
 623         struct scsi_qla_host *vha,
 624         fc_port_t *fcport,
 625         bool local)
 626 {
 627         struct qla_hw_data *ha = vha->hw;
 628         struct qla_tgt_sess *sess;
 629         unsigned long flags;
 630         unsigned char be_sid[3];
 631
 632         /* Check to avoid double sessions */
 633         spin_lock_irqsave(&ha->hardware_lock, flags);
 634         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 635                                 sess_list_entry) {
 636                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 637                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 638                             "Double sess %p found (s_id %x:%x:%x, "
 639                             "loop_id %d), updating to d_id %x:%x:%x, "
 640                             "loop_id %d", sess, sess->s_id.b.domain,
 641                             sess->s_id.b.al_pa, sess->s_id.b.area,
 642                             sess->loop_id, fcport->d_id.b.domain,
 643                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 644                             fcport->loop_id);
 645
 646                         if (sess->deleted)
 647                                 qlt_undelete_sess(sess);
 648
 649                         kref_get(&sess->se_sess->sess_kref);
 650                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 651                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 652
 653                         if (sess->local && !local)
 654                                 sess->local = 0;
 655                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 656
 657                         return sess;
 658                 }
 659         }
 660         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 661
 662         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 663         if (!sess) {
 664                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 665                     "qla_target(%u): session allocation failed, all commands "
 666                     "from port %8phC will be refused", vha->vp_idx,
 667                     fcport->port_name);
 668
 669                 return NULL;
 670         }
 671         sess->tgt = vha->vha_tgt.qla_tgt;
 672         sess->vha = vha;
 673         sess->s_id = fcport->d_id;
 674         sess->loop_id = fcport->loop_id;
 675         sess->local = local;
 676
 677         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 678             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 679             sess, vha->vha_tgt.qla_tgt);
 680
 681         be_sid[0] = sess->s_id.b.domain;
 682         be_sid[1] = sess->s_id.b.area;
 683         be_sid[2] = sess->s_id.b.al_pa;
 684         /*
 685          * Determine if this fc_port->port_name is allowed to access
 686          * target mode using explict NodeACLs+MappedLUNs, or using
 687          * TPG demo mode.  If this is successful a target mode FC nexus
 688          * is created.
 689          */
 690         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 691             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 692                 kfree(sess);
 693                 return NULL;
 694         }
 695         /*
 696          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 697          * access across ->hardware_lock reaquire.
 698          */
 699         kref_get(&sess->se_sess->sess_kref);
 700
 701         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 702         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 703         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 704
 705         spin_lock_irqsave(&ha->hardware_lock, flags);
 706         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 707         vha->vha_tgt.qla_tgt->sess_count++;
 708         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 709
 710         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 711             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 712             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 713             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 714             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 715             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 716
 717         return sess;
 718 }
 719
 720 /*
 721  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 722  */
 723 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 724 {
 725         struct qla_hw_data *ha = vha->hw;
 726         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 727         struct qla_tgt_sess *sess;
 728         unsigned long flags;
 729
 730         if (!vha->hw->tgt.tgt_ops)
 731                 return;
 732
 733         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 734                 return;
 735
 736         if (qla_ini_mode_enabled(vha))
 737                 return;
 738
 739         spin_lock_irqsave(&ha->hardware_lock, flags);
 740         if (tgt->tgt_stop) {
 741                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 742                 return;
 743         }
 744         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 745         if (!sess) {
 746                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 747
 748                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 749                 sess = qlt_create_sess(vha, fcport, false);
 750                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 751
 752                 spin_lock_irqsave(&ha->hardware_lock, flags);
 753         } else {
 754                 kref_get(&sess->se_sess->sess_kref);
 755
 756                 if (sess->deleted) {
 757                         qlt_undelete_sess(sess);
 758
 759                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 760                             "qla_target(%u): %ssession for port %8phC "
 761                             "(loop ID %d) reappeared\n", vha->vp_idx,
 762                             sess->local ? "local " : "", sess->port_name,
 763                             sess->loop_id);
 764
 765                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 766                             "Reappeared sess %p\n", sess);
 767                 }
 768                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 769                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 770         }
 771
 772         if (sess && sess->local) {
 773                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 774                     "qla_target(%u): local session for "
 775                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 776                     fcport->port_name, sess->loop_id);
 777                 sess->local = 0;
 778         }
 779         ha->tgt.tgt_ops->put_sess(sess);
 780         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 781 }
 782
 783 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 784 {
 785         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 786         struct qla_tgt_sess *sess;
 787
 788         if (!vha->hw->tgt.tgt_ops)
 789                 return;
 790
 791         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 792                 return;
 793
 794         if (tgt->tgt_stop) {
 795                 return;
 796         }
 797         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 798         if (!sess) {
 799                 return;
 800         }
 801
 802         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 803
 804         sess->local = 1;
 805         qlt_schedule_sess_for_deletion(sess, false);
 806 }
 807
 808 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 809 {
 810         struct qla_hw_data *ha = tgt->ha;
 811         unsigned long flags;
 812         int res;
 813         /*
 814          * We need to protect against race, when tgt is freed before or
 815          * inside wake_up()
 816          */
 817         spin_lock_irqsave(&ha->hardware_lock, flags);
 818         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 819             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 820             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 821         res = (tgt->sess_count == 0);
 822         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 823
 824         return res;
 825 }
 826
 827 /* Called by tcm_qla2xxx configfs code */
 828 int qlt_stop_phase1(struct qla_tgt *tgt)
 829 {
 830         struct scsi_qla_host *vha = tgt->vha;
 831         struct qla_hw_data *ha = tgt->ha;
 832         unsigned long flags;
 833
 834         mutex_lock(&qla_tgt_mutex);
 835         if (!vha->fc_vport) {
 836                 struct Scsi_Host *sh = vha->host;
 837                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 838                 bool npiv_vports;
 839
 840                 spin_lock_irqsave(sh->host_lock, flags);
 841                 npiv_vports = (fc_host->npiv_vports_inuse);
 842                 spin_unlock_irqrestore(sh->host_lock, flags);
 843
 844                 if (npiv_vports) {
 845                         mutex_unlock(&qla_tgt_mutex);
 846                         return -EPERM;
 847                 }
 848         }
 849         if (tgt->tgt_stop || tgt->tgt_stopped) {
 850                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 851                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 852                 mutex_unlock(&qla_tgt_mutex);
 853                 return -EPERM;
 854         }
 855
 856         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 857             vha->host_no, vha);
 858         /*
 859          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 860          * Lock is needed, because we still can get an incoming packet.
 861          */
 862         mutex_lock(&vha->vha_tgt.tgt_mutex);
 863         spin_lock_irqsave(&ha->hardware_lock, flags);
 864         tgt->tgt_stop = 1;
 865         qlt_clear_tgt_db(tgt);
 866         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 867         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 868         mutex_unlock(&qla_tgt_mutex);
 869
 870         flush_delayed_work(&tgt->sess_del_work);
 871
 872         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 873             "Waiting for sess works (tgt %p)", tgt);
 874         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 875         while (!list_empty(&tgt->sess_works_list)) {
 876                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 877                 flush_scheduled_work();
 878                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 879         }
 880         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 881
 882         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 883             "Waiting for tgt %p: list_empty(sess_list)=%d "
 884             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 885             tgt->sess_count);
 886
 887         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 888
 889         /* Big hammer */
 890         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 891                 qlt_disable_vha(vha);
 892
 893         /* Wait for sessions to clear out (just in case) */
 894         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 895         return 0;
 896 }
 897 EXPORT_SYMBOL(qlt_stop_phase1);
 898
 899 /* Called by tcm_qla2xxx configfs code */
 900 void qlt_stop_phase2(struct qla_tgt *tgt)
 901 {
 902         struct qla_hw_data *ha = tgt->ha;
 903         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 904         unsigned long flags;
 905
 906         if (tgt->tgt_stopped) {
 907                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
 908                     "Already in tgt->tgt_stopped state\n");
 909                 dump_stack();
 910                 return;
 911         }
 912
 913         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
 914             "Waiting for %d IRQ commands to complete (tgt %p)",
 915             tgt->irq_cmd_count, tgt);
 916
 917         mutex_lock(&vha->vha_tgt.tgt_mutex);
 918         spin_lock_irqsave(&ha->hardware_lock, flags);
 919         while (tgt->irq_cmd_count != 0) {
 920                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 921                 udelay(2);
 922                 spin_lock_irqsave(&ha->hardware_lock, flags);
 923         }
 924         tgt->tgt_stop = 0;
 925         tgt->tgt_stopped = 1;
 926         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 927         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 928
 929         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
 930             tgt);
 931 }
 932 EXPORT_SYMBOL(qlt_stop_phase2);
 933
 934 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 935 static void qlt_release(struct qla_tgt *tgt)
 936 {
 937         scsi_qla_host_t *vha = tgt->vha;
 938
 939         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 940                 qlt_stop_phase2(tgt);
 941
 942         vha->vha_tgt.qla_tgt = NULL;
 943
 944         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
 945             "Release of tgt %p finished\n", tgt);
 946
 947         kfree(tgt);
 948 }
 949
 950 /* ha->hardware_lock supposed to be held on entry */
 951 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 952         const void *param, unsigned int param_size)
 953 {
 954         struct qla_tgt_sess_work_param *prm;
 955         unsigned long flags;
 956
 957         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 958         if (!prm) {
 959                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 960                     "qla_target(%d): Unable to create session "
 961                     "work, command will be refused", 0);
 962                 return -ENOMEM;
 963         }
 964
 965         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 966             "Scheduling work (type %d, prm %p)"
 967             " to find session for param %p (size %d, tgt %p)\n",
 968             type, prm, param, param_size, tgt);
 969
 970         prm->type = type;
 971         memcpy(&prm->tm_iocb, param, param_size);
 972
 973         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 974         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 975         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 976
 977         schedule_work(&tgt->sess_work);
 978
 979         return 0;
 980 }
 981
 982 /*
 983  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 984  */
 985 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 986         struct imm_ntfy_from_isp *ntfy,
 987         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 988         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 989 {
 990         struct qla_hw_data *ha = vha->hw;
 991         request_t *pkt;
 992         struct nack_to_isp *nack;
 993
 994         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
 995
 996         /* Send marker if required */
 997         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
 998                 return;
 999
1000         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1001         if (!pkt) {
1002                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1003                     "qla_target(%d): %s failed: unable to allocate "
1004                     "request packet\n", vha->vp_idx, __func__);
1005                 return;
1006         }
1007
1008         if (vha->vha_tgt.qla_tgt != NULL)
1009                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1010
1011         pkt->entry_type = NOTIFY_ACK_TYPE;
1012         pkt->entry_count = 1;
1013
1014         nack = (struct nack_to_isp *)pkt;
1015         nack->ox_id = ntfy->ox_id;
1016
1017         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1018         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1019                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1020                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1021         }
1022         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1023         nack->u.isp24.status = ntfy->u.isp24.status;
1024         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1025         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1026         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1027         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1028         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1029         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1030         nack->u.isp24.srr_reject_code = srr_reject_code;
1031         nack->u.isp24.srr_reject_code_expl = srr_explan;
1032         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1033
1034         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1035             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1036             vha->vp_idx, nack->u.isp24.status);
1037
1038         /* Memory Barrier */
1039         wmb();
1040         qla2x00_start_iocbs(vha, vha->req);
1041 }
1042
1043 /*
1044  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1045  */
1046 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1047         struct abts_recv_from_24xx *abts, uint32_t status,
1048         bool ids_reversed)
1049 {
1050         struct qla_hw_data *ha = vha->hw;
1051         struct abts_resp_to_24xx *resp;
1052         uint32_t f_ctl;
1053         uint8_t *p;
1054
1055         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1056             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1057             ha, abts, status);
1058
1059         /* Send marker if required */
1060         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1061                 return;
1062
1063         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1064         if (!resp) {
1065                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1066                     "qla_target(%d): %s failed: unable to allocate "
1067                     "request packet", vha->vp_idx, __func__);
1068                 return;
1069         }
1070
1071         resp->entry_type = ABTS_RESP_24XX;
1072         resp->entry_count = 1;
1073         resp->nport_handle = abts->nport_handle;
1074         resp->vp_index = vha->vp_idx;
1075         resp->sof_type = abts->sof_type;
1076         resp->exchange_address = abts->exchange_address;
1077         resp->fcp_hdr_le = abts->fcp_hdr_le;
1078         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1079             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1080             F_CTL_SEQ_INITIATIVE);
1081         p = (uint8_t *)&f_ctl;
1082         resp->fcp_hdr_le.f_ctl[0] = *p++;
1083         resp->fcp_hdr_le.f_ctl[1] = *p++;
1084         resp->fcp_hdr_le.f_ctl[2] = *p;
1085         if (ids_reversed) {
1086                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1087                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1088                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1089                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1090                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1091                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1092         } else {
1093                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1094                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1095                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1096                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1097                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1098                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1099         }
1100         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1101         if (status == FCP_TMF_CMPL) {
1102                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1103                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1104                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1105                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1106                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1107                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1108         } else {
1109                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1110                 resp->payload.ba_rjt.reason_code =
1111                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1112                 /* Other bytes are zero */
1113         }
1114
1115         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1116
1117         /* Memory Barrier */
1118         wmb();
1119         qla2x00_start_iocbs(vha, vha->req);
1120 }
1121
1122 /*
1123  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1124  */
1125 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1126         struct abts_resp_from_24xx_fw *entry)
1127 {
1128         struct ctio7_to_24xx *ctio;
1129
1130         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1131             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1132         /* Send marker if required */
1133         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1134                 return;
1135
1136         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1137         if (ctio == NULL) {
1138                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1139                     "qla_target(%d): %s failed: unable to allocate "
1140                     "request packet\n", vha->vp_idx, __func__);
1141                 return;
1142         }
1143
1144         /*
1145          * We've got on entrance firmware's response on by us generated
1146          * ABTS response. So, in it ID fields are reversed.
1147          */
1148
1149         ctio->entry_type = CTIO_TYPE7;
1150         ctio->entry_count = 1;
1151         ctio->nport_handle = entry->nport_handle;
1152         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1153         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1154         ctio->vp_index = vha->vp_idx;
1155         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1156         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1157         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1158         ctio->exchange_addr = entry->exchange_addr_to_abort;
1159         ctio->u.status1.flags =
1160             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1161                 CTIO7_FLAGS_TERMINATE);
1162         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1163
1164         /* Memory Barrier */
1165         wmb();
1166         qla2x00_start_iocbs(vha, vha->req);
1167
1168         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1169             FCP_TMF_CMPL, true);
1170 }
1171
1172 /* ha->hardware_lock supposed to be held on entry */
1173 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1174         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1175 {
1176         struct qla_hw_data *ha = vha->hw;
1177         struct se_session *se_sess = sess->se_sess;
1178         struct qla_tgt_mgmt_cmd *mcmd;
1179         struct se_cmd *se_cmd;
1180         u32 lun = 0;
1181         int rc;
1182         bool found_lun = false;
1183
1184         spin_lock(&se_sess->sess_cmd_lock);
1185         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1186                 struct qla_tgt_cmd *cmd =
1187                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1188                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1189                         lun = cmd->unpacked_lun;
1190                         found_lun = true;
1191                         break;
1192                 }
1193         }
1194         spin_unlock(&se_sess->sess_cmd_lock);
1195
1196         if (!found_lun)
1197                 return -ENOENT;
1198
1199         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1200             "qla_target(%d): task abort (tag=%d)\n",
1201             vha->vp_idx, abts->exchange_addr_to_abort);
1202
1203         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1204         if (mcmd == NULL) {
1205                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1206                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1207                     vha->vp_idx, __func__);
1208                 return -ENOMEM;
1209         }
1210         memset(mcmd, 0, sizeof(*mcmd));
1211
1212         mcmd->sess = sess;
1213         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1214         mcmd->reset_count = vha->hw->chip_reset;
1215
1216         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1217             abts->exchange_addr_to_abort);
1218         if (rc != 0) {
1219                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1220                     "qla_target(%d):  tgt_ops->handle_tmr()"
1221                     " failed: %d", vha->vp_idx, rc);
1222                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1223                 return -EFAULT;
1224         }
1225
1226         return 0;
1227 }
1228
1229 /*
1230  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1231  */
1232 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1233         struct abts_recv_from_24xx *abts)
1234 {
1235         struct qla_hw_data *ha = vha->hw;
1236         struct qla_tgt_sess *sess;
1237         uint32_t tag = abts->exchange_addr_to_abort;
1238         uint8_t s_id[3];
1239         int rc;
1240
1241         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1242                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1243                     "qla_target(%d): ABTS: Abort Sequence not "
1244                     "supported\n", vha->vp_idx);
1245                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1246                 return;
1247         }
1248
1249         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1250                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1251                     "qla_target(%d): ABTS: Unknown Exchange "
1252                     "Address received\n", vha->vp_idx);
1253                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1254                 return;
1255         }
1256
1257         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1258             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1259             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1260             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1261             le32_to_cpu(abts->fcp_hdr_le.parameter));
1262
1263         s_id[0] = abts->fcp_hdr_le.s_id[2];
1264         s_id[1] = abts->fcp_hdr_le.s_id[1];
1265         s_id[2] = abts->fcp_hdr_le.s_id[0];
1266
1267         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1268         if (!sess) {
1269                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1270                     "qla_target(%d): task abort for non-existant session\n",
1271                     vha->vp_idx);
1272                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1273                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1274                 if (rc != 0) {
1275                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1276                             false);
1277                 }
1278                 return;
1279         }
1280
1281         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1282         if (rc != 0) {
1283                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1284                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1285                     vha->vp_idx, rc);
1286                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1287                 return;
1288         }
1289 }
1290
1291 /*
1292  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1293  */
1294 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1295         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1296 {
1297         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1298         struct ctio7_to_24xx *ctio;
1299         uint16_t temp;
1300
1301         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1302             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1303             ha, atio, resp_code);
1304
1305         /* Send marker if required */
1306         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1307                 return;
1308
1309         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1310         if (ctio == NULL) {
1311                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1312                     "qla_target(%d): %s failed: unable to allocate "
1313                     "request packet\n", ha->vp_idx, __func__);
1314                 return;
1315         }
1316
1317         ctio->entry_type = CTIO_TYPE7;
1318         ctio->entry_count = 1;
1319         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1320         ctio->nport_handle = mcmd->sess->loop_id;
1321         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1322         ctio->vp_index = ha->vp_idx;
1323         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1324         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1325         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1326         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1327         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1328             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1329                 CTIO7_FLAGS_SEND_STATUS);
1330         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1331         ctio->u.status1.ox_id = cpu_to_le16(temp);
1332         ctio->u.status1.scsi_status =
1333             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1334         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1335         ctio->u.status1.sense_data[0] = resp_code;
1336
1337         /* Memory Barrier */
1338         wmb();
1339         qla2x00_start_iocbs(ha, ha->req);
1340 }
1341
1342 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1343 {
1344         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1345 }
1346 EXPORT_SYMBOL(qlt_free_mcmd);
1347
1348 /* callback from target fabric module code */
1349 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1350 {
1351         struct scsi_qla_host *vha = mcmd->sess->vha;
1352         struct qla_hw_data *ha = vha->hw;
1353         unsigned long flags;
1354
1355         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1356             "TM response mcmd (%p) status %#x state %#x",
1357             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1358
1359         spin_lock_irqsave(&ha->hardware_lock, flags);
1360
1361         if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1362                 /*
1363                  * Either a chip reset is active or this request was from
1364                  * previous life, just abort the processing.
1365                  */
1366                 ql_dbg(ql_dbg_async, vha, 0xe100,
1367                         "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1368                         qla2x00_reset_active(vha), mcmd->reset_count,
1369                         ha->chip_reset);
1370                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1371                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1372                 return;
1373         }
1374
1375         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1376                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1377                     0, 0, 0, 0, 0, 0);
1378         else {
1379                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1380                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1381                             mcmd->fc_tm_rsp, false);
1382                 else
1383                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1384                             mcmd->fc_tm_rsp);
1385         }
1386         /*
1387          * Make the callback for ->free_mcmd() to queue_work() and invoke
1388          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1389          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1390          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1391          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1392          * qlt_xmit_tm_rsp() returns here..
1393          */
1394         ha->tgt.tgt_ops->free_mcmd(mcmd);
1395         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1396 }
1397 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1398
1399 /* No locks */
1400 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1401 {
1402         struct qla_tgt_cmd *cmd = prm->cmd;
1403
1404         BUG_ON(cmd->sg_cnt == 0);
1405
1406         prm->sg = (struct scatterlist *)cmd->sg;
1407         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1408             cmd->sg_cnt, cmd->dma_data_direction);
1409         if (unlikely(prm->seg_cnt == 0))
1410                 goto out_err;
1411
1412         prm->cmd->sg_mapped = 1;
1413
1414         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1415                 /*
1416                  * If greater than four sg entries then we need to allocate
1417                  * the continuation entries
1418                  */
1419                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1420                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1421                         prm->tgt->datasegs_per_cmd,
1422                         prm->tgt->datasegs_per_cont);
1423         } else {
1424                 /* DIF */
1425                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1426                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1427                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1428                         prm->tot_dsds = prm->seg_cnt;
1429                 } else
1430                         prm->tot_dsds = prm->seg_cnt;
1431
1432                 if (cmd->prot_sg_cnt) {
1433                         prm->prot_sg      = cmd->prot_sg;
1434                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1435                                 cmd->prot_sg, cmd->prot_sg_cnt,
1436                                 cmd->dma_data_direction);
1437                         if (unlikely(prm->prot_seg_cnt == 0))
1438                                 goto out_err;
1439
1440                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1441                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1442                                 /* Dif Bundling not support here */
1443                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1444                                                                 cmd->blk_sz);
1445                                 prm->tot_dsds += prm->prot_seg_cnt;
1446                         } else
1447                                 prm->tot_dsds += prm->prot_seg_cnt;
1448                 }
1449         }
1450
1451         return 0;
1452
1453 out_err:
1454         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1455             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1456             0, prm->cmd->sg_cnt);
1457         return -1;
1458 }
1459
1460 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1461 {
1462         struct qla_hw_data *ha = vha->hw;
1463
1464         if (!cmd->sg_mapped)
1465                 return;
1466
1467         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1468         cmd->sg_mapped = 0;
1469
1470         if (cmd->prot_sg_cnt)
1471                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1472                         cmd->dma_data_direction);
1473
1474         if (cmd->ctx_dsd_alloced)
1475                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1476
1477         if (cmd->ctx)
1478                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1479 }
1480
1481 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1482         uint32_t req_cnt)
1483 {
1484         uint32_t cnt, cnt_in;
1485
1486         if (vha->req->cnt < (req_cnt + 2)) {
1487                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1488                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1489
1490                 if  (vha->req->ring_index < cnt)
1491                         vha->req->cnt = cnt - vha->req->ring_index;
1492                 else
1493                         vha->req->cnt = vha->req->length -
1494                             (vha->req->ring_index - cnt);
1495         }
1496
1497         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1498                 ql_dbg(ql_dbg_io, vha, 0x305a,
1499                     "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
1500                     vha->vp_idx, vha->req->ring_index,
1501                     vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1502                 return -EAGAIN;
1503         }
1504         vha->req->cnt -= req_cnt;
1505
1506         return 0;
1507 }
1508
1509 /*
1510  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1511  */
1512 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1513 {
1514         /* Adjust ring index. */
1515         vha->req->ring_index++;
1516         if (vha->req->ring_index == vha->req->length) {
1517                 vha->req->ring_index = 0;
1518                 vha->req->ring_ptr = vha->req->ring;
1519         } else {
1520                 vha->req->ring_ptr++;
1521         }
1522         return (cont_entry_t *)vha->req->ring_ptr;
1523 }
1524
1525 /* ha->hardware_lock supposed to be held on entry */
1526 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1527 {
1528         struct qla_hw_data *ha = vha->hw;
1529         uint32_t h;
1530
1531         h = ha->tgt.current_handle;
1532         /* always increment cmd handle */
1533         do {
1534                 ++h;
1535                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1536                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1537                 if (h == ha->tgt.current_handle) {
1538                         ql_dbg(ql_dbg_io, vha, 0x305b,
1539                             "qla_target(%d): Ran out of "
1540                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1541                         h = QLA_TGT_NULL_HANDLE;
1542                         break;
1543                 }
1544         } while ((h == QLA_TGT_NULL_HANDLE) ||
1545             (h == QLA_TGT_SKIP_HANDLE) ||
1546             (ha->tgt.cmds[h-1] != NULL));
1547
1548         if (h != QLA_TGT_NULL_HANDLE)
1549                 ha->tgt.current_handle = h;
1550
1551         return h;
1552 }
1553
1554 /* ha->hardware_lock supposed to be held on entry */
1555 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1556         struct scsi_qla_host *vha)
1557 {
1558         uint32_t h;
1559         struct ctio7_to_24xx *pkt;
1560         struct qla_hw_data *ha = vha->hw;
1561         struct atio_from_isp *atio = &prm->cmd->atio;
1562         uint16_t temp;
1563
1564         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1565         prm->pkt = pkt;
1566         memset(pkt, 0, sizeof(*pkt));
1567
1568         pkt->entry_type = CTIO_TYPE7;
1569         pkt->entry_count = (uint8_t)prm->req_cnt;
1570         pkt->vp_index = vha->vp_idx;
1571
1572         h = qlt_make_handle(vha);
1573         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1574                 /*
1575                  * CTIO type 7 from the firmware doesn't provide a way to
1576                  * know the initiator's LOOP ID, hence we can't find
1577                  * the session and, so, the command.
1578                  */
1579                 return -EAGAIN;
1580         } else
1581                 ha->tgt.cmds[h-1] = prm->cmd;
1582
1583         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1584         pkt->nport_handle = prm->cmd->loop_id;
1585         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1586         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1587         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1588         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1589         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1590         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1591         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1592         pkt->u.status0.ox_id = cpu_to_le16(temp);
1593         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1594
1595         return 0;
1596 }
1597
1598 /*
1599  * ha->hardware_lock supposed to be held on entry. We have already made sure
1600  * that there is sufficient amount of request entries to not drop it.
1601  */
1602 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1603         struct scsi_qla_host *vha)
1604 {
1605         int cnt;
1606         uint32_t *dword_ptr;
1607         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1608
1609         /* Build continuation packets */
1610         while (prm->seg_cnt > 0) {
1611                 cont_a64_entry_t *cont_pkt64 =
1612                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1613
1614                 /*
1615                  * Make sure that from cont_pkt64 none of
1616                  * 64-bit specific fields used for 32-bit
1617                  * addressing. Cast to (cont_entry_t *) for
1618                  * that.
1619                  */
1620
1621                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1622
1623                 cont_pkt64->entry_count = 1;
1624                 cont_pkt64->sys_define = 0;
1625
1626                 if (enable_64bit_addressing) {
1627                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1628                         dword_ptr =
1629                             (uint32_t *)&cont_pkt64->dseg_0_address;
1630                 } else {
1631                         cont_pkt64->entry_type = CONTINUE_TYPE;
1632                         dword_ptr =
1633                             (uint32_t *)&((cont_entry_t *)
1634                                 cont_pkt64)->dseg_0_address;
1635                 }
1636
1637                 /* Load continuation entry data segments */
1638                 for (cnt = 0;
1639                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1640                     cnt++, prm->seg_cnt--) {
1641                         *dword_ptr++ =
1642                             cpu_to_le32(pci_dma_lo32
1643                                 (sg_dma_address(prm->sg)));
1644                         if (enable_64bit_addressing) {
1645                                 *dword_ptr++ =
1646                                     cpu_to_le32(pci_dma_hi32
1647                                         (sg_dma_address
1648                                         (prm->sg)));
1649                         }
1650                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1651
1652                         prm->sg = sg_next(prm->sg);
1653                 }
1654         }
1655 }
1656
1657 /*
1658  * ha->hardware_lock supposed to be held on entry. We have already made sure
1659  * that there is sufficient amount of request entries to not drop it.
1660  */
1661 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1662         struct scsi_qla_host *vha)
1663 {
1664         int cnt;
1665         uint32_t *dword_ptr;
1666         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1667         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1668
1669         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1670
1671         /* Setup packet address segment pointer */
1672         dword_ptr = pkt24->u.status0.dseg_0_address;
1673
1674         /* Set total data segment count */
1675         if (prm->seg_cnt)
1676                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1677
1678         if (prm->seg_cnt == 0) {
1679                 /* No data transfer */
1680                 *dword_ptr++ = 0;
1681                 *dword_ptr = 0;
1682                 return;
1683         }
1684
1685         /* If scatter gather */
1686
1687         /* Load command entry data segments */
1688         for (cnt = 0;
1689             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1690             cnt++, prm->seg_cnt--) {
1691                 *dword_ptr++ =
1692                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1693                 if (enable_64bit_addressing) {
1694                         *dword_ptr++ =
1695                             cpu_to_le32(pci_dma_hi32(
1696                                 sg_dma_address(prm->sg)));
1697                 }
1698                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1699
1700                 prm->sg = sg_next(prm->sg);
1701         }
1702
1703         qlt_load_cont_data_segments(prm, vha);
1704 }
1705
1706 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1707 {
1708         return cmd->bufflen > 0;
1709 }
1710
1711 /*
1712  * Called without ha->hardware_lock held
1713  */
1714 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1715         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1716         uint32_t *full_req_cnt)
1717 {
1718         struct qla_tgt *tgt = cmd->tgt;
1719         struct scsi_qla_host *vha = tgt->vha;
1720         struct qla_hw_data *ha = vha->hw;
1721         struct se_cmd *se_cmd = &cmd->se_cmd;
1722
1723         if (unlikely(cmd->aborted)) {
1724                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1725                        "qla_target(%d): terminating exchange for aborted cmd=%p (se_cmd=%p, tag=%lld)",
1726                        vha->vp_idx, cmd, se_cmd, se_cmd->tag);
1727
1728                 cmd->state = QLA_TGT_STATE_ABORTED;
1729                 cmd->cmd_flags |= BIT_6;
1730
1731                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1732
1733                 /* !! At this point cmd could be already freed !! */
1734                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1735         }
1736
1737         prm->cmd = cmd;
1738         prm->tgt = tgt;
1739         prm->rq_result = scsi_status;
1740         prm->sense_buffer = &cmd->sense_buffer[0];
1741         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1742         prm->sg = NULL;
1743         prm->seg_cnt = -1;
1744         prm->req_cnt = 1;
1745         prm->add_status_pkt = 0;
1746
1747         /* Send marker if required */
1748         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1749                 return -EFAULT;
1750
1751         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1752                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1753                         return -EAGAIN;
1754         }
1755
1756         *full_req_cnt = prm->req_cnt;
1757
1758         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1759                 prm->residual = se_cmd->residual_count;
1760                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1761                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1762                        prm->residual, se_cmd->tag,
1763                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1764                        cmd->bufflen, prm->rq_result);
1765                 prm->rq_result |= SS_RESIDUAL_UNDER;
1766         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1767                 prm->residual = se_cmd->residual_count;
1768                 ql_dbg(ql_dbg_io, vha, 0x305d,
1769                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1770                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1771                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1772                 prm->rq_result |= SS_RESIDUAL_OVER;
1773         }
1774
1775         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1776                 /*
1777                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1778                  * ignored in *xmit_response() below
1779                  */
1780                 if (qlt_has_data(cmd)) {
1781                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1782                             (IS_FWI2_CAPABLE(ha) &&
1783                             (prm->rq_result != 0))) {
1784                                 prm->add_status_pkt = 1;
1785                                 (*full_req_cnt)++;
1786                         }
1787                 }
1788         }
1789
1790         return 0;
1791 }
1792
1793 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1794         struct qla_tgt_cmd *cmd, int sending_sense)
1795 {
1796         if (ha->tgt.enable_class_2)
1797                 return 0;
1798
1799         if (sending_sense)
1800                 return cmd->conf_compl_supported;
1801         else
1802                 return ha->tgt.enable_explicit_conf &&
1803                     cmd->conf_compl_supported;
1804 }
1805
1806 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1807 /*
1808  *  Original taken from the XFS code
1809  */
1810 static unsigned long qlt_srr_random(void)
1811 {
1812         static int Inited;
1813         static unsigned long RandomValue;
1814         static DEFINE_SPINLOCK(lock);
1815         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1816         register long rv;
1817         register long lo;
1818         register long hi;
1819         unsigned long flags;
1820
1821         spin_lock_irqsave(&lock, flags);
1822         if (!Inited) {
1823                 RandomValue = jiffies;
1824                 Inited = 1;
1825         }
1826         rv = RandomValue;
1827         hi = rv / 127773;
1828         lo = rv % 127773;
1829         rv = 16807 * lo - 2836 * hi;
1830         if (rv <= 0)
1831                 rv += 2147483647;
1832         RandomValue = rv;
1833         spin_unlock_irqrestore(&lock, flags);
1834         return rv;
1835 }
1836
1837 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1838 {
1839 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1840         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1841             == 50) {
1842                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1843                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1844                     "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
1845         }
1846 #endif
1847         /*
1848          * It's currently not possible to simulate SRRs for FCP_WRITE without
1849          * a physical link layer failure, so don't even try here..
1850          */
1851         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1852                 return;
1853
1854         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1855             ((qlt_srr_random() % 100) == 20)) {
1856                 int i, leave = 0;
1857                 unsigned int tot_len = 0;
1858
1859                 while (leave == 0)
1860                         leave = qlt_srr_random() % cmd->sg_cnt;
1861
1862                 for (i = 0; i < leave; i++)
1863                         tot_len += cmd->sg[i].length;
1864
1865                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1866                     "Cutting cmd %p (tag %d) buffer"
1867                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1868                     " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
1869                     cmd->bufflen, cmd->sg_cnt);
1870
1871                 cmd->bufflen = tot_len;
1872                 cmd->sg_cnt = leave;
1873         }
1874
1875         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1876                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1877
1878                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1879                     "Cutting cmd %p (tag %d) buffer head "
1880                     "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
1881                     cmd->bufflen);
1882                 if (offset == 0)
1883                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1884                 else if (qlt_set_data_offset(cmd, offset)) {
1885                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1886                             "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
1887                 }
1888         }
1889 }
1890 #else
1891 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1892 {}
1893 #endif
1894
1895 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1896         struct qla_tgt_prm *prm)
1897 {
1898         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1899             (uint32_t)sizeof(ctio->u.status1.sense_data));
1900         ctio->u.status0.flags |=
1901             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1902         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1903                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1904                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1905                     CTIO7_FLAGS_CONFORM_REQ);
1906         }
1907         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1908         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1909         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1910                 int i;
1911
1912                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1913                         if (prm->cmd->se_cmd.scsi_status != 0) {
1914                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1915                                     "Skipping EXPLICIT_CONFORM and "
1916                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1917                                     "non GOOD status\n");
1918                                 goto skip_explict_conf;
1919                         }
1920                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1921                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1922                             CTIO7_FLAGS_CONFORM_REQ);
1923                 }
1924 skip_explict_conf:
1925                 ctio->u.status1.flags &=
1926                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1927                 ctio->u.status1.flags |=
1928                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1929                 ctio->u.status1.scsi_status |=
1930                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1931                 ctio->u.status1.sense_length =
1932                     cpu_to_le16(prm->sense_buffer_len);
1933                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1934                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1935                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1936 #if 0
1937                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1938                         static int q;
1939                         if (q < 10) {
1940                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1941                                     "qla_target(%d): %d bytes of sense "
1942                                     "lost", prm->tgt->ha->vp_idx,
1943                                     prm->sense_buffer_len % 4);
1944                                 q++;
1945                         }
1946                 }
1947 #endif
1948         } else {
1949                 ctio->u.status1.flags &=
1950                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1951                 ctio->u.status1.flags |=
1952                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1953                 ctio->u.status1.sense_length = 0;
1954                 memset(ctio->u.status1.sense_data, 0,
1955                     sizeof(ctio->u.status1.sense_data));
1956         }
1957
1958         /* Sense with len > 24, is it possible ??? */
1959 }
1960
1961
1962
1963 /* diff  */
1964 static inline int
1965 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1966 {
1967         /*
1968          * Uncomment when corresponding SCSI changes are done.
1969          *
1970          if (!sp->cmd->prot_chk)
1971          return 0;
1972          *
1973          */
1974         switch (se_cmd->prot_op) {
1975         case TARGET_PROT_DOUT_INSERT:
1976         case TARGET_PROT_DIN_STRIP:
1977                 if (ql2xenablehba_err_chk >= 1)
1978                         return 1;
1979                 break;
1980         case TARGET_PROT_DOUT_PASS:
1981         case TARGET_PROT_DIN_PASS:
1982                 if (ql2xenablehba_err_chk >= 2)
1983                         return 1;
1984                 break;
1985         case TARGET_PROT_DIN_INSERT:
1986         case TARGET_PROT_DOUT_STRIP:
1987                 return 1;
1988         default:
1989                 break;
1990         }
1991         return 0;
1992 }
1993
1994 /*
1995  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
1996  *
1997  */
1998 static inline void
1999 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2000 {
2001         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2002
2003         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2004          * have been immplemented by TCM, before AppTag is avail.
2005          * Look for modesense_handlers[]
2006          */
2007         ctx->app_tag = 0;
2008         ctx->app_tag_mask[0] = 0x0;
2009         ctx->app_tag_mask[1] = 0x0;
2010
2011         switch (se_cmd->prot_type) {
2012         case TARGET_DIF_TYPE0_PROT:
2013                 /*
2014                  * No check for ql2xenablehba_err_chk, as it would be an
2015                  * I/O error if hba tag generation is not done.
2016                  */
2017                 ctx->ref_tag = cpu_to_le32(lba);
2018
2019                 if (!qlt_hba_err_chk_enabled(se_cmd))
2020                         break;
2021
2022                 /* enable ALL bytes of the ref tag */
2023                 ctx->ref_tag_mask[0] = 0xff;
2024                 ctx->ref_tag_mask[1] = 0xff;
2025                 ctx->ref_tag_mask[2] = 0xff;
2026                 ctx->ref_tag_mask[3] = 0xff;
2027                 break;
2028         /*
2029          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2030          * 16 bit app tag.
2031          */
2032         case TARGET_DIF_TYPE1_PROT:
2033                 ctx->ref_tag = cpu_to_le32(lba);
2034
2035                 if (!qlt_hba_err_chk_enabled(se_cmd))
2036                         break;
2037
2038                 /* enable ALL bytes of the ref tag */
2039                 ctx->ref_tag_mask[0] = 0xff;
2040                 ctx->ref_tag_mask[1] = 0xff;
2041                 ctx->ref_tag_mask[2] = 0xff;
2042                 ctx->ref_tag_mask[3] = 0xff;
2043                 break;
2044         /*
2045          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2046          * match LBA in CDB + N
2047          */
2048         case TARGET_DIF_TYPE2_PROT:
2049                 ctx->ref_tag = cpu_to_le32(lba);
2050
2051                 if (!qlt_hba_err_chk_enabled(se_cmd))
2052                         break;
2053
2054                 /* enable ALL bytes of the ref tag */
2055                 ctx->ref_tag_mask[0] = 0xff;
2056                 ctx->ref_tag_mask[1] = 0xff;
2057                 ctx->ref_tag_mask[2] = 0xff;
2058                 ctx->ref_tag_mask[3] = 0xff;
2059                 break;
2060
2061         /* For Type 3 protection: 16 bit GUARD only */
2062         case TARGET_DIF_TYPE3_PROT:
2063                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2064                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2065                 break;
2066         }
2067 }
2068
2069
2070 static inline int
2071 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2072 {
2073         uint32_t                *cur_dsd;
2074         int                     sgc;
2075         uint32_t                transfer_length = 0;
2076         uint32_t                data_bytes;
2077         uint32_t                dif_bytes;
2078         uint8_t                 bundling = 1;
2079         uint8_t                 *clr_ptr;
2080         struct crc_context      *crc_ctx_pkt = NULL;
2081         struct qla_hw_data      *ha;
2082         struct ctio_crc2_to_fw  *pkt;
2083         dma_addr_t              crc_ctx_dma;
2084         uint16_t                fw_prot_opts = 0;
2085         struct qla_tgt_cmd      *cmd = prm->cmd;
2086         struct se_cmd           *se_cmd = &cmd->se_cmd;
2087         uint32_t h;
2088         struct atio_from_isp *atio = &prm->cmd->atio;
2089         uint16_t t16;
2090
2091         sgc = 0;
2092         ha = vha->hw;
2093
2094         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2095         prm->pkt = pkt;
2096         memset(pkt, 0, sizeof(*pkt));
2097
2098         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2099                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2100                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2101                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2102
2103         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2104             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2105                 bundling = 0;
2106
2107         /* Compute dif len and adjust data len to incude protection */
2108         data_bytes = cmd->bufflen;
2109         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2110
2111         switch (se_cmd->prot_op) {
2112         case TARGET_PROT_DIN_INSERT:
2113         case TARGET_PROT_DOUT_STRIP:
2114                 transfer_length = data_bytes;
2115                 data_bytes += dif_bytes;
2116                 break;
2117
2118         case TARGET_PROT_DIN_STRIP:
2119         case TARGET_PROT_DOUT_INSERT:
2120         case TARGET_PROT_DIN_PASS:
2121         case TARGET_PROT_DOUT_PASS:
2122                 transfer_length = data_bytes + dif_bytes;
2123                 break;
2124
2125         default:
2126                 BUG();
2127                 break;
2128         }
2129
2130         if (!qlt_hba_err_chk_enabled(se_cmd))
2131                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2132         /* HBA error checking enabled */
2133         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2134                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2135                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2136                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2137                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2138                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2139         }
2140
2141         switch (se_cmd->prot_op) {
2142         case TARGET_PROT_DIN_INSERT:
2143         case TARGET_PROT_DOUT_INSERT:
2144                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2145                 break;
2146         case TARGET_PROT_DIN_STRIP:
2147         case TARGET_PROT_DOUT_STRIP:
2148                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2149                 break;
2150         case TARGET_PROT_DIN_PASS:
2151         case TARGET_PROT_DOUT_PASS:
2152                 fw_prot_opts |= PO_MODE_DIF_PASS;
2153                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2154                 break;
2155         default:/* Normal Request */
2156                 fw_prot_opts |= PO_MODE_DIF_PASS;
2157                 break;
2158         }
2159
2160
2161         /* ---- PKT ---- */
2162         /* Update entry type to indicate Command Type CRC_2 IOCB */
2163         pkt->entry_type  = CTIO_CRC2;
2164         pkt->entry_count = 1;
2165         pkt->vp_index = vha->vp_idx;
2166
2167         h = qlt_make_handle(vha);
2168         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2169                 /*
2170                  * CTIO type 7 from the firmware doesn't provide a way to
2171                  * know the initiator's LOOP ID, hence we can't find
2172                  * the session and, so, the command.
2173                  */
2174                 return -EAGAIN;
2175         } else
2176                 ha->tgt.cmds[h-1] = prm->cmd;
2177
2178
2179         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2180         pkt->nport_handle = prm->cmd->loop_id;
2181         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2182         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2183         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2184         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2185         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2186
2187         /* silence compile warning */
2188         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2189         pkt->ox_id  = cpu_to_le16(t16);
2190
2191         t16 = (atio->u.isp24.attr << 9);
2192         pkt->flags |= cpu_to_le16(t16);
2193         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2194
2195         /* Set transfer direction */
2196         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2197                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2198         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2199                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2200
2201
2202         pkt->dseg_count = prm->tot_dsds;
2203         /* Fibre channel byte count */
2204         pkt->transfer_length = cpu_to_le32(transfer_length);
2205
2206
2207         /* ----- CRC context -------- */
2208
2209         /* Allocate CRC context from global pool */
2210         crc_ctx_pkt = cmd->ctx =
2211             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2212
2213         if (!crc_ctx_pkt)
2214                 goto crc_queuing_error;
2215
2216         /* Zero out CTX area. */
2217         clr_ptr = (uint8_t *)crc_ctx_pkt;
2218         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2219
2220         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2221         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2222
2223         /* Set handle */
2224         crc_ctx_pkt->handle = pkt->handle;
2225
2226         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2227
2228         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2229         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2230         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2231
2232
2233         if (!bundling) {
2234                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2235         } else {
2236                 /*
2237                  * Configure Bundling if we need to fetch interlaving
2238                  * protection PCI accesses
2239                  */
2240                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2241                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2242                 crc_ctx_pkt->u.bundling.dseg_count =
2243                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2244                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2245         }
2246
2247         /* Finish the common fields of CRC pkt */
2248         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2249         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2250         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2251         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2252
2253
2254         /* Walks data segments */
2255         pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2256
2257         if (!bundling && prm->prot_seg_cnt) {
2258                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2259                         prm->tot_dsds, cmd))
2260                         goto crc_queuing_error;
2261         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2262                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2263                 goto crc_queuing_error;
2264
2265         if (bundling && prm->prot_seg_cnt) {
2266                 /* Walks dif segments */
2267                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2268
2269                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2270                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2271                         prm->prot_seg_cnt, cmd))
2272                         goto crc_queuing_error;
2273         }
2274         return QLA_SUCCESS;
2275
2276 crc_queuing_error:
2277         /* Cleanup will be performed by the caller */
2278
2279         return QLA_FUNCTION_FAILED;
2280 }
2281
2282
2283 /*
2284  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2285  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2286  */
2287 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2288         uint8_t scsi_status)
2289 {
2290         struct scsi_qla_host *vha = cmd->vha;
2291         struct qla_hw_data *ha = vha->hw;
2292         struct ctio7_to_24xx *pkt;
2293         struct qla_tgt_prm prm;
2294         uint32_t full_req_cnt = 0;
2295         unsigned long flags = 0;
2296         int res;
2297
2298         memset(&prm, 0, sizeof(prm));
2299         qlt_check_srr_debug(cmd, &xmit_type);
2300
2301         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2302             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2303             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2304             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2305             &cmd->se_cmd);
2306
2307         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2308             &full_req_cnt);
2309         if (unlikely(res != 0)) {
2310                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2311                         return 0;
2312
2313                 return res;
2314         }
2315
2316         spin_lock_irqsave(&ha->hardware_lock, flags);
2317
2318         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2319                 /*
2320                  * Either a chip reset is active or this request was from
2321                  * previous life, just abort the processing.
2322                  */
2323                 cmd->state = QLA_TGT_STATE_PROCESSED;
2324                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2325                 ql_dbg(ql_dbg_async, vha, 0xe101,
2326                         "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2327                         qla2x00_reset_active(vha), cmd->reset_count,
2328                         ha->chip_reset);
2329                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2330                 return 0;
2331         }
2332
2333         /* Does F/W have an IOCBs for this request */
2334         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2335         if (unlikely(res))
2336                 goto out_unmap_unlock;
2337
2338         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2339                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2340         else
2341                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2342         if (unlikely(res != 0))
2343                 goto out_unmap_unlock;
2344
2345
2346         pkt = (struct ctio7_to_24xx *)prm.pkt;
2347
2348         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2349                 pkt->u.status0.flags |=
2350                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2351                         CTIO7_FLAGS_STATUS_MODE_0);
2352
2353                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2354                         qlt_load_data_segments(&prm, vha);
2355
2356                 if (prm.add_status_pkt == 0) {
2357                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2358                                 pkt->u.status0.scsi_status =
2359                                     cpu_to_le16(prm.rq_result);
2360                                 pkt->u.status0.residual =
2361                                     cpu_to_le32(prm.residual);
2362                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2363                                     CTIO7_FLAGS_SEND_STATUS);
2364                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2365                                         pkt->u.status0.flags |=
2366                                             __constant_cpu_to_le16(
2367                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2368                                                 CTIO7_FLAGS_CONFORM_REQ);
2369                                 }
2370                         }
2371
2372                 } else {
2373                         /*
2374                          * We have already made sure that there is sufficient
2375                          * amount of request entries to not drop HW lock in
2376                          * req_pkt().
2377                          */
2378                         struct ctio7_to_24xx *ctio =
2379                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2380
2381                         ql_dbg(ql_dbg_io, vha, 0x305e,
2382                             "Building additional status packet 0x%p.\n",
2383                             ctio);
2384
2385                         /*
2386                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2387                          * ctio7_to_24xx
2388                          */
2389                         memcpy(ctio, pkt, sizeof(*ctio));
2390                         /* reset back to CTIO7 */
2391                         ctio->entry_count = 1;
2392                         ctio->entry_type = CTIO_TYPE7;
2393                         ctio->dseg_count = 0;
2394                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2395                             CTIO7_FLAGS_DATA_IN);
2396
2397                         /* Real finish is ctio_m1's finish */
2398                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2399                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2400                             CTIO7_FLAGS_DONT_RET_CTIO);
2401
2402                         /* qlt_24xx_init_ctio_to_isp will correct
2403                          * all neccessary fields that's part of CTIO7.
2404                          * There should be no residual of CTIO-CRC2 data.
2405                          */
2406                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2407                             &prm);
2408                         pr_debug("Status CTIO7: %p\n", ctio);
2409                 }
2410         } else
2411                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2412
2413
2414         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2415         cmd->cmd_sent_to_fw = 1;
2416
2417         /* Memory Barrier */
2418         wmb();
2419         qla2x00_start_iocbs(vha, vha->req);
2420         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2421
2422         return 0;
2423
2424 out_unmap_unlock:
2425         qlt_unmap_sg(vha, cmd);
2426         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2427
2428         return res;
2429 }
2430 EXPORT_SYMBOL(qlt_xmit_response);
2431
2432 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2433 {
2434         struct ctio7_to_24xx *pkt;
2435         struct scsi_qla_host *vha = cmd->vha;
2436         struct qla_hw_data *ha = vha->hw;
2437         struct qla_tgt *tgt = cmd->tgt;
2438         struct qla_tgt_prm prm;
2439         unsigned long flags;
2440         int res = 0;
2441
2442         memset(&prm, 0, sizeof(prm));
2443         prm.cmd = cmd;
2444         prm.tgt = tgt;
2445         prm.sg = NULL;
2446         prm.req_cnt = 1;
2447
2448         /* Send marker if required */
2449         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2450                 return -EIO;
2451
2452         /* Calculate number of entries and segments required */
2453         if (qlt_pci_map_calc_cnt(&prm) != 0)
2454                 return -EAGAIN;
2455
2456         spin_lock_irqsave(&ha->hardware_lock, flags);
2457
2458         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2459                 /*
2460                  * Either a chip reset is active or this request was from
2461                  * previous life, just abort the processing.
2462                  */
2463                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2464                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2465                 ql_dbg(ql_dbg_async, vha, 0xe102,
2466                         "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2467                         qla2x00_reset_active(vha), cmd->reset_count,
2468                         ha->chip_reset);
2469                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2470                 return 0;
2471         }
2472
2473         /* Does F/W have an IOCBs for this request */
2474         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2475         if (res != 0)
2476                 goto out_unlock_free_unmap;
2477         if (cmd->se_cmd.prot_op)
2478                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2479         else
2480                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2481
2482         if (unlikely(res != 0))
2483                 goto out_unlock_free_unmap;
2484         pkt = (struct ctio7_to_24xx *)prm.pkt;
2485         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2486             CTIO7_FLAGS_STATUS_MODE_0);
2487
2488         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2489                 qlt_load_data_segments(&prm, vha);
2490
2491         cmd->state = QLA_TGT_STATE_NEED_DATA;
2492         cmd->cmd_sent_to_fw = 1;
2493
2494         /* Memory Barrier */
2495         wmb();
2496         qla2x00_start_iocbs(vha, vha->req);
2497         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2498
2499         return res;
2500
2501 out_unlock_free_unmap:
2502         qlt_unmap_sg(vha, cmd);
2503         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2504
2505         return res;
2506 }
2507 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2508
2509
2510 /*
2511  * Checks the guard or meta-data for the type of error
2512  * detected by the HBA.
2513  */
2514 static inline int
2515 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2516                 struct ctio_crc_from_fw *sts)
2517 {
2518         uint8_t         *ap = &sts->actual_dif[0];
2519         uint8_t         *ep = &sts->expected_dif[0];
2520         uint32_t        e_ref_tag, a_ref_tag;
2521         uint16_t        e_app_tag, a_app_tag;
2522         uint16_t        e_guard, a_guard;
2523         uint64_t        lba = cmd->se_cmd.t_task_lba;
2524
2525         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2526         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2527         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2528
2529         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2530         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2531         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2532
2533         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2534             "iocb(s) %p Returned STATUS.\n", sts);
2535
2536         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2537             "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2538             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2539             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2540
2541         /*
2542          * Ignore sector if:
2543          * For type     3: ref & app tag is all 'f's
2544          * For type 0,1,2: app tag is all 'f's
2545          */
2546         if ((a_app_tag == 0xffff) &&
2547             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2548              (a_ref_tag == 0xffffffff))) {
2549                 uint32_t blocks_done;
2550
2551                 /* 2TB boundary case covered automatically with this */
2552                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2553                 cmd->se_cmd.bad_sector = e_ref_tag;
2554                 cmd->se_cmd.pi_err = 0;
2555                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2556                         "need to return scsi good\n");
2557
2558                 /* Update protection tag */
2559                 if (cmd->prot_sg_cnt) {
2560                         uint32_t i, j = 0, k = 0, num_ent;
2561                         struct scatterlist *sg, *sgl;
2562
2563
2564                         sgl = cmd->prot_sg;
2565
2566                         /* Patch the corresponding protection tags */
2567                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2568                                 num_ent = sg_dma_len(sg) / 8;
2569                                 if (k + num_ent < blocks_done) {
2570                                         k += num_ent;
2571                                         continue;
2572                                 }
2573                                 j = blocks_done - k - 1;
2574                                 k = blocks_done;
2575                                 break;
2576                         }
2577
2578                         if (k != blocks_done) {
2579                                 ql_log(ql_log_warn, vha, 0xf076,
2580                                     "unexpected tag values tag:lba=%u:%llu)\n",
2581                                     e_ref_tag, (unsigned long long)lba);
2582                                 goto out;
2583                         }
2584
2585 #if 0
2586                         struct sd_dif_tuple *spt;
2587                         /* TODO:
2588                          * This section came from initiator. Is it valid here?
2589                          * should ulp be override with actual val???
2590                          */
2591                         spt = page_address(sg_page(sg)) + sg->offset;
2592                         spt += j;
2593
2594                         spt->app_tag = 0xffff;
2595                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2596                                 spt->ref_tag = 0xffffffff;
2597 #endif
2598                 }
2599
2600                 return 0;
2601         }
2602
2603         /* check guard */
2604         if (e_guard != a_guard) {
2605                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2606                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2607
2608                 ql_log(ql_log_warn, vha, 0xe076,
2609                     "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2610                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2611                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2612                     a_guard, e_guard, cmd);
2613                 goto out;
2614         }
2615
2616         /* check ref tag */
2617         if (e_ref_tag != a_ref_tag) {
2618                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2619                 cmd->se_cmd.bad_sector = e_ref_tag;
2620
2621                 ql_log(ql_log_warn, vha, 0xe077,
2622                         "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2623                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2624                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2625                         a_guard, e_guard, cmd);
2626                 goto out;
2627         }
2628
2629         /* check appl tag */
2630         if (e_app_tag != a_app_tag) {
2631                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2632                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2633
2634                 ql_log(ql_log_warn, vha, 0xe078,
2635                         "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2636                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2637                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2638                         a_guard, e_guard, cmd);
2639                 goto out;
2640         }
2641 out:
2642         return 1;
2643 }
2644
2645
2646 /* If hardware_lock held on entry, might drop it, then reaquire */
2647 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2648 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2649         struct qla_tgt_cmd *cmd,
2650         struct atio_from_isp *atio)
2651 {
2652         struct ctio7_to_24xx *ctio24;
2653         struct qla_hw_data *ha = vha->hw;
2654         request_t *pkt;
2655         int ret = 0;
2656         uint16_t temp;
2657
2658         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2659
2660         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2661         if (pkt == NULL) {
2662                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2663                     "qla_target(%d): %s failed: unable to allocate "
2664                     "request packet\n", vha->vp_idx, __func__);
2665                 return -ENOMEM;
2666         }
2667
2668         if (cmd != NULL) {
2669                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2670                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2671                             "qla_target(%d): Terminating cmd %p with "
2672                             "incorrect state %d\n", vha->vp_idx, cmd,
2673                             cmd->state);
2674                 } else
2675                         ret = 1;
2676         }
2677
2678         pkt->entry_count = 1;
2679         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2680
2681         ctio24 = (struct ctio7_to_24xx *)pkt;
2682         ctio24->entry_type = CTIO_TYPE7;
2683         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2684         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2685         ctio24->vp_index = vha->vp_idx;
2686         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2687         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2688         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2689         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2690         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2691             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2692                 CTIO7_FLAGS_TERMINATE);
2693         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2694         ctio24->u.status1.ox_id = cpu_to_le16(temp);
2695
2696         /* Most likely, it isn't needed */
2697         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2698             &atio->u.isp24.fcp_cmnd.add_cdb[
2699             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2700         if (ctio24->u.status1.residual != 0)
2701                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2702
2703         /* Memory Barrier */
2704         wmb();
2705         qla2x00_start_iocbs(vha, vha->req);
2706         return ret;
2707 }
2708
2709 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2710         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2711 {
2712         unsigned long flags;
2713         int rc;
2714
2715         if (qlt_issue_marker(vha, ha_locked) < 0)
2716                 return;
2717
2718         if (ha_locked) {
2719                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2720                 if (rc == -ENOMEM)
2721                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2722                 goto done;
2723         }
2724         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2725         rc = __qlt_send_term_exchange(vha, cmd, atio);
2726         if (rc == -ENOMEM)
2727                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2728         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2729
2730 done:
2731         if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
2732             !cmd->cmd_sent_to_fw)) {
2733                 if (!ha_locked && !in_interrupt())
2734                         msleep(250); /* just in case */
2735
2736                 qlt_unmap_sg(vha, cmd);
2737                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2738         }
2739         return;
2740 }
2741
2742 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
2743 {
2744         struct list_head free_list;
2745         struct qla_tgt_cmd *cmd, *tcmd;
2746
2747         vha->hw->tgt.leak_exchg_thresh_hold =
2748             (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
2749
2750         cmd = tcmd = NULL;
2751         if (!list_empty(&vha->hw->tgt.q_full_list)) {
2752                 INIT_LIST_HEAD(&free_list);
2753                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
2754
2755                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
2756                         list_del(&cmd->cmd_list);
2757                         /* This cmd was never sent to TCM.  There is no need
2758                          * to schedule free or call free_cmd
2759                          */
2760                         qlt_free_cmd(cmd);
2761                         vha->hw->tgt.num_qfull_cmds_alloc--;
2762                 }
2763         }
2764         vha->hw->tgt.num_qfull_cmds_dropped = 0;
2765 }
2766
2767 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
2768 {
2769         uint32_t total_leaked;
2770
2771         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
2772
2773         if (vha->hw->tgt.leak_exchg_thresh_hold &&
2774             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
2775
2776                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
2777                     "Chip reset due to exchange starvation: %d/%d.\n",
2778                     total_leaked, vha->hw->fw_xcb_count);
2779
2780                 if (IS_P3P_TYPE(vha->hw))
2781                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
2782                 else
2783                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
2784                 qla2xxx_wake_dpc(vha);
2785         }
2786
2787 }
2788
2789 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2790 {
2791         struct qla_tgt_sess *sess = cmd->sess;
2792
2793         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2794             "%s: se_cmd[%p] ox_id %04x\n",
2795             __func__, &cmd->se_cmd,
2796             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2797
2798         BUG_ON(cmd->cmd_in_wq);
2799
2800         if (!cmd->q_full)
2801                 qlt_decr_num_pend_cmds(cmd->vha);
2802
2803         BUG_ON(cmd->sg_mapped);
2804         cmd->jiffies_at_free = get_jiffies_64();
2805         if (unlikely(cmd->free_sg))
2806                 kfree(cmd->sg);
2807
2808         if (!sess || !sess->se_sess) {
2809                 WARN_ON(1);
2810                 return;
2811         }
2812         cmd->jiffies_at_free = get_jiffies_64();
2813         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2814 }
2815 EXPORT_SYMBOL(qlt_free_cmd);
2816
2817 /* ha->hardware_lock supposed to be held on entry */
2818 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2819         struct qla_tgt_cmd *cmd, void *ctio)
2820 {
2821         struct qla_tgt_srr_ctio *sc;
2822         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2823         struct qla_tgt_srr_imm *imm;
2824
2825         tgt->ctio_srr_id++;
2826         cmd->cmd_flags |= BIT_15;
2827
2828         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2829             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2830
2831         if (!ctio) {
2832                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2833                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2834                     vha->vp_idx);
2835                 return -EINVAL;
2836         }
2837
2838         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2839         if (sc != NULL) {
2840                 sc->cmd = cmd;
2841                 /* IRQ is already OFF */
2842                 spin_lock(&tgt->srr_lock);
2843                 sc->srr_id = tgt->ctio_srr_id;
2844                 list_add_tail(&sc->srr_list_entry,
2845                     &tgt->srr_ctio_list);
2846                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2847                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2848                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2849                         int found = 0;
2850                         list_for_each_entry(imm, &tgt->srr_imm_list,
2851                             srr_list_entry) {
2852                                 if (imm->srr_id == sc->srr_id) {
2853                                         found = 1;
2854                                         break;
2855                                 }
2856                         }
2857                         if (found) {
2858                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2859                                     "Scheduling srr work\n");
2860                                 schedule_work(&tgt->srr_work);
2861                         } else {
2862                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2863                                     "qla_target(%d): imm_srr_id "
2864                                     "== ctio_srr_id (%d), but there is no "
2865                                     "corresponding SRR IMM, deleting CTIO "
2866                                     "SRR %p\n", vha->vp_idx,
2867                                     tgt->ctio_srr_id, sc);
2868                                 list_del(&sc->srr_list_entry);
2869                                 spin_unlock(&tgt->srr_lock);
2870
2871                                 kfree(sc);
2872                                 return -EINVAL;
2873                         }
2874                 }
2875                 spin_unlock(&tgt->srr_lock);
2876         } else {
2877                 struct qla_tgt_srr_imm *ti;
2878
2879                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2880                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2881                     vha->vp_idx);
2882                 spin_lock(&tgt->srr_lock);
2883                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2884                     srr_list_entry) {
2885                         if (imm->srr_id == tgt->ctio_srr_id) {
2886                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2887                                     "IMM SRR %p deleted (id %d)\n",
2888                                     imm, imm->srr_id);
2889                                 list_del(&imm->srr_list_entry);
2890                                 qlt_reject_free_srr_imm(vha, imm, 1);
2891                         }
2892                 }
2893                 spin_unlock(&tgt->srr_lock);
2894
2895                 return -ENOMEM;
2896         }
2897
2898         return 0;
2899 }
2900
2901 /*
2902  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2903  */
2904 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2905         struct qla_tgt_cmd *cmd, uint32_t status)
2906 {
2907         int term = 0;
2908
2909         if (ctio != NULL) {
2910                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2911                 term = !(c->flags &
2912                     __constant_cpu_to_le16(OF_TERM_EXCH));
2913         } else
2914                 term = 1;
2915
2916         if (term)
2917                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2918
2919         return term;
2920 }
2921
2922 /* ha->hardware_lock supposed to be held on entry */
2923 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2924         uint32_t handle)
2925 {
2926         struct qla_hw_data *ha = vha->hw;
2927
2928         handle--;
2929         if (ha->tgt.cmds[handle] != NULL) {
2930                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2931                 ha->tgt.cmds[handle] = NULL;
2932                 return cmd;
2933         } else
2934                 return NULL;
2935 }
2936
2937 /* ha->hardware_lock supposed to be held on entry */
2938 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2939         uint32_t handle, void *ctio)
2940 {
2941         struct qla_tgt_cmd *cmd = NULL;
2942
2943         /* Clear out internal marks */
2944         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2945             CTIO_INTERMEDIATE_HANDLE_MARK);
2946
2947         if (handle != QLA_TGT_NULL_HANDLE) {
2948                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
2949                         return NULL;
2950
2951                 /* handle-1 is actually used */
2952                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2953                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2954                             "qla_target(%d): Wrong handle %x received\n",
2955                             vha->vp_idx, handle);
2956                         return NULL;
2957                 }
2958                 cmd = qlt_get_cmd(vha, handle);
2959                 if (unlikely(cmd == NULL)) {
2960                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2961                             "qla_target(%d): Suspicious: unable to "
2962                             "find the command with handle %x\n", vha->vp_idx,
2963                             handle);
2964                         return NULL;
2965                 }
2966         } else if (ctio != NULL) {
2967                 /* We can't get loop ID from CTIO7 */
2968                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2969                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2970                     "support NULL handles\n", vha->vp_idx);
2971                 return NULL;
2972         }
2973
2974         return cmd;
2975 }
2976
2977 /* hardware_lock should be held by caller. */
2978 static void
2979 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2980 {
2981         struct qla_hw_data *ha = vha->hw;
2982         uint32_t handle;
2983
2984         if (cmd->sg_mapped)
2985                 qlt_unmap_sg(vha, cmd);
2986
2987         handle = qlt_make_handle(vha);
2988
2989         /* TODO: fix debug message type and ids. */
2990         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2991                 ql_dbg(ql_dbg_io, vha, 0xff00,
2992                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
2993         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2994                 cmd->write_data_transferred = 0;
2995                 cmd->state = QLA_TGT_STATE_DATA_IN;
2996
2997                 ql_dbg(ql_dbg_io, vha, 0xff01,
2998                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
2999
3000                 ha->tgt.tgt_ops->handle_data(cmd);
3001                 return;
3002         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3003                 ql_dbg(ql_dbg_io, vha, 0xff02,
3004                     "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3005         } else {
3006                 ql_dbg(ql_dbg_io, vha, 0xff03,
3007                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3008                     cmd->state);
3009                 dump_stack();
3010         }
3011
3012         cmd->cmd_flags |= BIT_12;
3013         ha->tgt.tgt_ops->free_cmd(cmd);
3014 }
3015
3016 void
3017 qlt_host_reset_handler(struct qla_hw_data *ha)
3018 {
3019         struct qla_tgt_cmd *cmd;
3020         unsigned long flags;
3021         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3022         scsi_qla_host_t *vha = NULL;
3023         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3024         uint32_t i;
3025
3026         if (!base_vha->hw->tgt.tgt_ops)
3027                 return;
3028
3029         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3030                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3031                         "Target mode disabled\n");
3032                 return;
3033         }
3034
3035         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3036             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3037             base_vha->dpc_flags);
3038
3039         spin_lock_irqsave(&ha->hardware_lock, flags);
3040         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3041                 cmd = qlt_get_cmd(base_vha, i);
3042                 if (!cmd)
3043                         continue;
3044                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3045                 vha = cmd->vha;
3046                 qlt_abort_cmd_on_host_reset(vha, cmd);
3047         }
3048         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3049 }
3050
3051
3052 /*
3053  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3054  */
3055 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3056         uint32_t status, void *ctio)
3057 {
3058         struct qla_hw_data *ha = vha->hw;
3059         struct se_cmd *se_cmd;
3060         const struct target_core_fabric_ops *tfo;
3061         struct qla_tgt_cmd *cmd;
3062
3063         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3064                 /* That could happen only in case of an error/reset/abort */
3065                 if (status != CTIO_SUCCESS) {
3066                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3067                             "Intermediate CTIO received"
3068                             " (status %x)\n", status);
3069                 }
3070                 return;
3071         }
3072
3073         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3074         if (cmd == NULL)
3075                 return;
3076
3077         se_cmd = &cmd->se_cmd;
3078         tfo = se_cmd->se_tfo;
3079         cmd->cmd_sent_to_fw = 0;
3080
3081         qlt_unmap_sg(vha, cmd);
3082
3083         if (unlikely(status != CTIO_SUCCESS)) {
3084                 switch (status & 0xFFFF) {
3085                 case CTIO_LIP_RESET:
3086                 case CTIO_TARGET_RESET:
3087                 case CTIO_ABORTED:
3088                         /* driver request abort via Terminate exchange */
3089                 case CTIO_TIMEOUT:
3090                 case CTIO_INVALID_RX_ID:
3091                         /* They are OK */
3092                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3093                             "qla_target(%d): CTIO with "
3094                             "status %#x received, state %x, se_cmd %p, "
3095                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3096                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3097                             status, cmd->state, se_cmd);
3098                         break;
3099
3100                 case CTIO_PORT_LOGGED_OUT:
3101                 case CTIO_PORT_UNAVAILABLE:
3102                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3103                             "qla_target(%d): CTIO with PORT LOGGED "
3104                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
3105                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3106                             status, cmd->state, se_cmd);
3107                         break;
3108
3109                 case CTIO_SRR_RECEIVED:
3110                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3111                             "qla_target(%d): CTIO with SRR_RECEIVED"
3112                             " status %x received (state %x, se_cmd %p)\n",
3113                             vha->vp_idx, status, cmd->state, se_cmd);
3114                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3115                                 break;
3116                         else
3117                                 return;
3118
3119                 case CTIO_DIF_ERROR: {
3120                         struct ctio_crc_from_fw *crc =
3121                                 (struct ctio_crc_from_fw *)ctio;
3122                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3123                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3124                             vha->vp_idx, status, cmd->state, se_cmd,
3125                             *((u64 *)&crc->actual_dif[0]),
3126                             *((u64 *)&crc->expected_dif[0]));
3127
3128                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3129                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3130                                         /* scsi Write/xfer rdy complete */
3131                                         goto skip_term;
3132                                 } else {
3133                                         /* scsi read/xmit respond complete
3134                                          * call handle dif to send scsi status
3135                                          * rather than terminate exchange.
3136                                          */
3137                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3138                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3139                                         return;
3140                                 }
3141                         } else {
3142                                 /* Need to generate a SCSI good completion.
3143                                  * because FW did not send scsi status.
3144                                  */
3145                                 status = 0;
3146                                 goto skip_term;
3147                         }
3148                         break;
3149                 }
3150                 default:
3151                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3152                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3153                             vha->vp_idx, status, cmd->state, se_cmd);
3154                         break;
3155                 }
3156
3157
3158                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3159                  * cmd is already aborted/terminated, we don't
3160                  * need to terminate again.  The exchange is already
3161                  * cleaned up/freed at FW level.  Just cleanup at driver
3162                  * level.
3163                  */
3164                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3165                     (cmd->state != QLA_TGT_STATE_ABORTED)) {
3166                         cmd->cmd_flags |= BIT_13;
3167                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3168                                 return;
3169                 }
3170         }
3171 skip_term:
3172
3173         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3174                 ;
3175         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3176                 int rx_status = 0;
3177
3178                 cmd->state = QLA_TGT_STATE_DATA_IN;
3179
3180                 if (unlikely(status != CTIO_SUCCESS))
3181                         rx_status = -EIO;
3182                 else
3183                         cmd->write_data_transferred = 1;
3184
3185                 ha->tgt.tgt_ops->handle_data(cmd);
3186                 return;
3187         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3188                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3189                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3190         } else {
3191                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3192                     "qla_target(%d): A command in state (%d) should "
3193                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3194         }
3195
3196         if (unlikely(status != CTIO_SUCCESS) &&
3197                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3198                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3199                 dump_stack();
3200         }
3201
3202
3203         ha->tgt.tgt_ops->free_cmd(cmd);
3204 }
3205
3206 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3207         uint8_t task_codes)
3208 {
3209         int fcp_task_attr;
3210
3211         switch (task_codes) {
3212         case ATIO_SIMPLE_QUEUE:
3213                 fcp_task_attr = TCM_SIMPLE_TAG;
3214                 break;
3215         case ATIO_HEAD_OF_QUEUE:
3216                 fcp_task_attr = TCM_HEAD_TAG;
3217                 break;
3218         case ATIO_ORDERED_QUEUE:
3219                 fcp_task_attr = TCM_ORDERED_TAG;
3220                 break;
3221         case ATIO_ACA_QUEUE:
3222                 fcp_task_attr = TCM_ACA_TAG;
3223                 break;
3224         case ATIO_UNTAGGED:
3225                 fcp_task_attr = TCM_SIMPLE_TAG;
3226                 break;
3227         default:
3228                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3229                     "qla_target: unknown task code %x, use ORDERED instead\n",
3230                     task_codes);
3231                 fcp_task_attr = TCM_ORDERED_TAG;
3232                 break;
3233         }
3234
3235         return fcp_task_attr;
3236 }
3237
3238 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3239                                         uint8_t *);
3240 /*
3241  * Process context for I/O path into tcm_qla2xxx code
3242  */
3243 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3244 {
3245         scsi_qla_host_t *vha = cmd->vha;
3246         struct qla_hw_data *ha = vha->hw;
3247         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3248         struct qla_tgt_sess *sess = cmd->sess;
3249         struct atio_from_isp *atio = &cmd->atio;
3250         unsigned char *cdb;
3251         unsigned long flags;
3252         uint32_t data_length;
3253         int ret, fcp_task_attr, data_dir, bidi = 0;
3254
3255         cmd->cmd_in_wq = 0;
3256         cmd->cmd_flags |= BIT_1;
3257         if (tgt->tgt_stop)
3258                 goto out_term;
3259
3260         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3261         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3262         cmd->unpacked_lun = scsilun_to_int(
3263             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3264
3265         if (atio->u.isp24.fcp_cmnd.rddata &&
3266             atio->u.isp24.fcp_cmnd.wrdata) {
3267                 bidi = 1;
3268                 data_dir = DMA_TO_DEVICE;
3269         } else if (atio->u.isp24.fcp_cmnd.rddata)
3270                 data_dir = DMA_FROM_DEVICE;
3271         else if (atio->u.isp24.fcp_cmnd.wrdata)
3272                 data_dir = DMA_TO_DEVICE;
3273         else
3274                 data_dir = DMA_NONE;
3275
3276         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3277             atio->u.isp24.fcp_cmnd.task_attr);
3278         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3279             &atio->u.isp24.fcp_cmnd.add_cdb[
3280             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3281
3282         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3283                                           fcp_task_attr, data_dir, bidi);
3284         if (ret != 0)
3285                 goto out_term;
3286         /*
3287          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3288          */
3289         spin_lock_irqsave(&ha->hardware_lock, flags);
3290         ha->tgt.tgt_ops->put_sess(sess);
3291         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3292         return;
3293
3294 out_term:
3295         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3296         /*
3297          * cmd has not sent to target yet, so pass NULL as the second
3298          * argument to qlt_send_term_exchange() and free the memory here.
3299          */
3300         cmd->cmd_flags |= BIT_2;
3301         spin_lock_irqsave(&ha->hardware_lock, flags);
3302         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3303
3304         qlt_decr_num_pend_cmds(vha);
3305         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3306         ha->tgt.tgt_ops->put_sess(sess);
3307         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3308 }
3309
3310 static void qlt_do_work(struct work_struct *work)
3311 {
3312         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3313
3314         __qlt_do_work(cmd);
3315 }
3316
3317 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3318                                        struct qla_tgt_sess *sess,
3319                                        struct atio_from_isp *atio)
3320 {
3321         struct se_session *se_sess = sess->se_sess;
3322         struct qla_tgt_cmd *cmd;
3323         int tag;
3324
3325         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3326         if (tag < 0)
3327                 return NULL;
3328
3329         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3330         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3331
3332         memcpy(&cmd->atio, atio, sizeof(*atio));
3333         cmd->state = QLA_TGT_STATE_NEW;
3334         cmd->tgt = vha->vha_tgt.qla_tgt;
3335         qlt_incr_num_pend_cmds(vha);
3336         cmd->vha = vha;
3337         cmd->se_cmd.map_tag = tag;
3338         cmd->sess = sess;
3339         cmd->loop_id = sess->loop_id;
3340         cmd->conf_compl_supported = sess->conf_compl_supported;
3341
3342         return cmd;
3343 }
3344
3345 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3346                           uint16_t);
3347
3348 static void qlt_create_sess_from_atio(struct work_struct *work)
3349 {
3350         struct qla_tgt_sess_op *op = container_of(work,
3351                                         struct qla_tgt_sess_op, work);
3352         scsi_qla_host_t *vha = op->vha;
3353         struct qla_hw_data *ha = vha->hw;
3354         struct qla_tgt_sess *sess;
3355         struct qla_tgt_cmd *cmd;
3356         unsigned long flags;
3357         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3358
3359         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3360                 "qla_target(%d): Unable to find wwn login"
3361                 " (s_id %x:%x:%x), trying to create it manually\n",
3362                 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3363
3364         if (op->atio.u.raw.entry_count > 1) {
3365                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3366                         "Dropping multy entry atio %p\n", &op->atio);
3367                 goto out_term;
3368         }
3369
3370         mutex_lock(&vha->vha_tgt.tgt_mutex);
3371         sess = qlt_make_local_sess(vha, s_id);
3372         /* sess has an extra creation ref. */
3373         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3374
3375         if (!sess)
3376                 goto out_term;
3377         /*
3378          * Now obtain a pre-allocated session tag using the original op->atio
3379          * packet header, and dispatch into __qlt_do_work() using the existing
3380          * process context.
3381          */
3382         cmd = qlt_get_tag(vha, sess, &op->atio);
3383         if (!cmd) {
3384                 spin_lock_irqsave(&ha->hardware_lock, flags);
3385                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3386                 ha->tgt.tgt_ops->put_sess(sess);
3387                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3388                 kfree(op);
3389                 return;
3390         }
3391         /*
3392          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3393          * the extra reference taken above by qlt_make_local_sess()
3394          */
3395         __qlt_do_work(cmd);
3396         kfree(op);
3397         return;
3398
3399 out_term:
3400         spin_lock_irqsave(&ha->hardware_lock, flags);
3401         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3402         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3403         kfree(op);
3404
3405 }
3406
3407 /* ha->hardware_lock supposed to be held on entry */
3408 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3409         struct atio_from_isp *atio)
3410 {
3411         struct qla_hw_data *ha = vha->hw;
3412         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3413         struct qla_tgt_sess *sess;
3414         struct qla_tgt_cmd *cmd;
3415
3416         if (unlikely(tgt->tgt_stop)) {
3417                 ql_dbg(ql_dbg_io, vha, 0x3061,
3418                     "New command while device %p is shutting down\n", tgt);
3419                 return -EFAULT;
3420         }
3421
3422         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3423         if (unlikely(!sess)) {
3424                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3425                                                      GFP_ATOMIC);
3426                 if (!op)
3427                         return -ENOMEM;
3428
3429                 memcpy(&op->atio, atio, sizeof(*atio));
3430                 op->vha = vha;
3431                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3432                 queue_work(qla_tgt_wq, &op->work);
3433                 return 0;
3434         }
3435         /*
3436          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3437          */
3438         kref_get(&sess->se_sess->sess_kref);
3439
3440         cmd = qlt_get_tag(vha, sess, atio);
3441         if (!cmd) {
3442                 ql_dbg(ql_dbg_io, vha, 0x3062,
3443                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3444                 ha->tgt.tgt_ops->put_sess(sess);
3445                 return -ENOMEM;
3446         }
3447
3448         cmd->cmd_flags = 0;
3449         cmd->jiffies_at_alloc = get_jiffies_64();
3450
3451         cmd->reset_count = vha->hw->chip_reset;
3452
3453         cmd->cmd_in_wq = 1;
3454         cmd->cmd_flags |= BIT_0;
3455         INIT_WORK(&cmd->work, qlt_do_work);
3456         queue_work(qla_tgt_wq, &cmd->work);
3457         return 0;
3458
3459 }
3460
3461 /* ha->hardware_lock supposed to be held on entry */
3462 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3463         int fn, void *iocb, int flags)
3464 {
3465         struct scsi_qla_host *vha = sess->vha;
3466         struct qla_hw_data *ha = vha->hw;
3467         struct qla_tgt_mgmt_cmd *mcmd;
3468         int res;
3469         uint8_t tmr_func;
3470
3471         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3472         if (!mcmd) {
3473                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3474                     "qla_target(%d): Allocation of management "
3475                     "command failed, some commands and their data could "
3476                     "leak\n", vha->vp_idx);
3477                 return -ENOMEM;
3478         }
3479         memset(mcmd, 0, sizeof(*mcmd));
3480         mcmd->sess = sess;
3481
3482         if (iocb) {
3483                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3484                     sizeof(mcmd->orig_iocb.imm_ntfy));
3485         }
3486         mcmd->tmr_func = fn;
3487         mcmd->flags = flags;
3488         mcmd->reset_count = vha->hw->chip_reset;
3489
3490         switch (fn) {
3491         case QLA_TGT_CLEAR_ACA:
3492                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3493                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3494                 tmr_func = TMR_CLEAR_ACA;
3495                 break;
3496
3497         case QLA_TGT_TARGET_RESET:
3498                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3499                     "qla_target(%d): TARGET_RESET received\n",
3500                     sess->vha->vp_idx);
3501                 tmr_func = TMR_TARGET_WARM_RESET;
3502                 break;
3503
3504         case QLA_TGT_LUN_RESET:
3505                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3506                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3507                 tmr_func = TMR_LUN_RESET;
3508                 break;
3509
3510         case QLA_TGT_CLEAR_TS:
3511                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3512                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3513                 tmr_func = TMR_CLEAR_TASK_SET;
3514                 break;
3515
3516         case QLA_TGT_ABORT_TS:
3517                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3518                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3519                 tmr_func = TMR_ABORT_TASK_SET;
3520                 break;
3521 #if 0
3522         case QLA_TGT_ABORT_ALL:
3523                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3524                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3525                     sess->vha->vp_idx);
3526                 tmr_func = 0;
3527                 break;
3528
3529         case QLA_TGT_ABORT_ALL_SESS:
3530                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3531                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3532                     sess->vha->vp_idx);
3533                 tmr_func = 0;
3534                 break;
3535
3536         case QLA_TGT_NEXUS_LOSS_SESS:
3537                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3538                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3539                     sess->vha->vp_idx);
3540                 tmr_func = 0;
3541                 break;
3542
3543         case QLA_TGT_NEXUS_LOSS:
3544                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3545                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3546                 tmr_func = 0;
3547                 break;
3548 #endif
3549         default:
3550                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3551                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3552                     sess->vha->vp_idx, fn);
3553                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3554                 return -ENOSYS;
3555         }
3556
3557         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3558         if (res != 0) {
3559                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3560                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3561                     sess->vha->vp_idx, res);
3562                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3563                 return -EFAULT;
3564         }
3565
3566         return 0;
3567 }
3568
3569 /* ha->hardware_lock supposed to be held on entry */
3570 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3571 {
3572         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3573         struct qla_hw_data *ha = vha->hw;
3574         struct qla_tgt *tgt;
3575         struct qla_tgt_sess *sess;
3576         uint32_t lun, unpacked_lun;
3577         int lun_size, fn;
3578
3579         tgt = vha->vha_tgt.qla_tgt;
3580
3581         lun = a->u.isp24.fcp_cmnd.lun;
3582         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3583         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3584         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3585             a->u.isp24.fcp_hdr.s_id);
3586         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3587
3588         if (!sess) {
3589                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3590                     "qla_target(%d): task mgmt fn 0x%x for "
3591                     "non-existant session\n", vha->vp_idx, fn);
3592                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3593                     sizeof(struct atio_from_isp));
3594         }
3595
3596         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3597 }
3598
3599 /* ha->hardware_lock supposed to be held on entry */
3600 static int __qlt_abort_task(struct scsi_qla_host *vha,
3601         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3602 {
3603         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3604         struct qla_hw_data *ha = vha->hw;
3605         struct qla_tgt_mgmt_cmd *mcmd;
3606         uint32_t lun, unpacked_lun;
3607         int rc;
3608
3609         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3610         if (mcmd == NULL) {
3611                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3612                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3613                     vha->vp_idx, __func__);
3614                 return -ENOMEM;
3615         }
3616         memset(mcmd, 0, sizeof(*mcmd));
3617
3618         mcmd->sess = sess;
3619         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3620             sizeof(mcmd->orig_iocb.imm_ntfy));
3621
3622         lun = a->u.isp24.fcp_cmnd.lun;
3623         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3624         mcmd->reset_count = vha->hw->chip_reset;
3625
3626         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3627             le16_to_cpu(iocb->u.isp2x.seq_id));
3628         if (rc != 0) {
3629                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3630                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3631                     vha->vp_idx, rc);
3632                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3633                 return -EFAULT;
3634         }
3635
3636         return 0;
3637 }
3638
3639 /* ha->hardware_lock supposed to be held on entry */
3640 static int qlt_abort_task(struct scsi_qla_host *vha,
3641         struct imm_ntfy_from_isp *iocb)
3642 {
3643         struct qla_hw_data *ha = vha->hw;
3644         struct qla_tgt_sess *sess;
3645         int loop_id;
3646
3647         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3648
3649         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3650         if (sess == NULL) {
3651                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3652                     "qla_target(%d): task abort for unexisting "
3653                     "session\n", vha->vp_idx);
3654                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3655                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3656         }
3657
3658         return __qlt_abort_task(vha, iocb, sess);
3659 }
3660
3661 /*
3662  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3663  */
3664 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3665         struct imm_ntfy_from_isp *iocb)
3666 {
3667         int res = 0;
3668
3669         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3670             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3671             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3672
3673         switch (iocb->u.isp24.status_subcode) {
3674         case ELS_PLOGI:
3675         case ELS_FLOGI:
3676         case ELS_PRLI:
3677         case ELS_LOGO:
3678         case ELS_PRLO:
3679                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3680                 break;
3681         case ELS_PDISC:
3682         case ELS_ADISC:
3683         {
3684                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3685                 if (tgt->link_reinit_iocb_pending) {
3686                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3687                             0, 0, 0, 0, 0, 0);
3688                         tgt->link_reinit_iocb_pending = 0;
3689                 }
3690                 res = 1; /* send notify ack */
3691                 break;
3692         }
3693
3694         default:
3695                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3696                     "qla_target(%d): Unsupported ELS command %x "
3697                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3698                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3699                 break;
3700         }
3701
3702         return res;
3703 }
3704
3705 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3706 {
3707 #if 1
3708         /*
3709          * FIXME: Reject non zero SRR relative offset until we can test
3710          * this code properly.
3711          */
3712         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3713         return -1;
3714 #else
3715         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3716         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3717         int i, sg_srr_cnt, bufflen = 0;
3718
3719         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3720             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3721             "cmd->sg_cnt: %u, direction: %d\n",
3722             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3723
3724         if (!cmd->sg || !cmd->sg_cnt) {
3725                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3726                     "Missing cmd->sg or zero cmd->sg_cnt in"
3727                     " qla_tgt_set_data_offset\n");
3728                 return -EINVAL;
3729         }
3730         /*
3731          * Walk the current cmd->sg list until we locate the new sg_srr_start
3732          */
3733         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3734                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3735                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3736                     i, sg, sg_page(sg), sg->length, sg->offset);
3737
3738                 if ((sg->length + tmp) > offset) {
3739                         first_offset = rem_offset;
3740                         sg_srr_start = sg;
3741                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3742                             "Found matching sg[%d], using %p as sg_srr_start, "
3743                             "and using first_offset: %zu\n", i, sg,
3744                             first_offset);
3745                         break;
3746                 }
3747                 tmp += sg->length;
3748                 rem_offset -= sg->length;
3749         }
3750
3751         if (!sg_srr_start) {
3752                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3753                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3754                 return -EINVAL;
3755         }
3756         sg_srr_cnt = (cmd->sg_cnt - i);
3757
3758         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3759         if (!sg_srr) {
3760                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3761                     "Unable to allocate sgp\n");
3762                 return -ENOMEM;
3763         }
3764         sg_init_table(sg_srr, sg_srr_cnt);
3765         sgp = &sg_srr[0];
3766         /*
3767          * Walk the remaining list for sg_srr_start, mapping to the newly
3768          * allocated sg_srr taking first_offset into account.
3769          */
3770         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3771                 if (first_offset) {
3772                         sg_set_page(sgp, sg_page(sg),
3773                             (sg->length - first_offset), first_offset);
3774                         first_offset = 0;
3775                 } else {
3776                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3777                 }
3778                 bufflen += sgp->length;
3779
3780                 sgp = sg_next(sgp);
3781                 if (!sgp)
3782                         break;
3783         }
3784
3785         cmd->sg = sg_srr;
3786         cmd->sg_cnt = sg_srr_cnt;
3787         cmd->bufflen = bufflen;
3788         cmd->offset += offset;
3789         cmd->free_sg = 1;
3790
3791         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3792         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3793             cmd->sg_cnt);
3794         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3795             cmd->bufflen);
3796         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3797             cmd->offset);
3798
3799         if (cmd->sg_cnt < 0)
3800                 BUG();
3801
3802         if (cmd->bufflen < 0)
3803                 BUG();
3804
3805         return 0;
3806 #endif
3807 }
3808
3809 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3810         uint32_t srr_rel_offs, int *xmit_type)
3811 {
3812         int res = 0, rel_offs;
3813
3814         rel_offs = srr_rel_offs - cmd->offset;
3815         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3816             srr_rel_offs, rel_offs);
3817
3818         *xmit_type = QLA_TGT_XMIT_ALL;
3819
3820         if (rel_offs < 0) {
3821                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3822                     "qla_target(%d): SRR rel_offs (%d) < 0",
3823                     cmd->vha->vp_idx, rel_offs);
3824                 res = -1;
3825         } else if (rel_offs == cmd->bufflen)
3826                 *xmit_type = QLA_TGT_XMIT_STATUS;
3827         else if (rel_offs > 0)
3828                 res = qlt_set_data_offset(cmd, rel_offs);
3829
3830         return res;
3831 }
3832
3833 /* No locks, thread context */
3834 static void qlt_handle_srr(struct scsi_qla_host *vha,
3835         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3836 {
3837         struct imm_ntfy_from_isp *ntfy =
3838             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3839         struct qla_hw_data *ha = vha->hw;
3840         struct qla_tgt_cmd *cmd = sctio->cmd;
3841         struct se_cmd *se_cmd = &cmd->se_cmd;
3842         unsigned long flags;
3843         int xmit_type = 0, resp = 0;
3844         uint32_t offset;
3845         uint16_t srr_ui;
3846
3847         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3848         srr_ui = ntfy->u.isp24.srr_ui;
3849
3850         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3851             cmd, srr_ui);
3852
3853         switch (srr_ui) {
3854         case SRR_IU_STATUS:
3855                 spin_lock_irqsave(&ha->hardware_lock, flags);
3856                 qlt_send_notify_ack(vha, ntfy,
3857                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3858                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3859                 xmit_type = QLA_TGT_XMIT_STATUS;
3860                 resp = 1;
3861                 break;
3862         case SRR_IU_DATA_IN:
3863                 if (!cmd->sg || !cmd->sg_cnt) {
3864                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3865                             "Unable to process SRR_IU_DATA_IN due to"
3866                             " missing cmd->sg, state: %d\n", cmd->state);
3867                         dump_stack();
3868                         goto out_reject;
3869                 }
3870                 if (se_cmd->scsi_status != 0) {
3871                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3872                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3873                             "scsi_status\n");
3874                         goto out_reject;
3875                 }
3876                 cmd->bufflen = se_cmd->data_length;
3877
3878                 if (qlt_has_data(cmd)) {
3879                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3880                                 goto out_reject;
3881                         spin_lock_irqsave(&ha->hardware_lock, flags);
3882                         qlt_send_notify_ack(vha, ntfy,
3883                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3884                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3885                         resp = 1;
3886                 } else {
3887                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3888                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
3889                                vha->vp_idx, se_cmd->tag,
3890                             cmd->se_cmd.scsi_status);
3891                         goto out_reject;
3892                 }
3893                 break;
3894         case SRR_IU_DATA_OUT:
3895                 if (!cmd->sg || !cmd->sg_cnt) {
3896                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3897                             "Unable to process SRR_IU_DATA_OUT due to"
3898                             " missing cmd->sg\n");
3899                         dump_stack();
3900                         goto out_reject;
3901                 }
3902                 if (se_cmd->scsi_status != 0) {
3903                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3904                             "Rejecting SRR_IU_DATA_OUT"
3905                             " with non GOOD scsi_status\n");
3906                         goto out_reject;
3907                 }
3908                 cmd->bufflen = se_cmd->data_length;
3909
3910                 if (qlt_has_data(cmd)) {
3911                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3912                                 goto out_reject;
3913                         spin_lock_irqsave(&ha->hardware_lock, flags);
3914                         qlt_send_notify_ack(vha, ntfy,
3915                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3916                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3917                         if (xmit_type & QLA_TGT_XMIT_DATA) {
3918                                 cmd->cmd_flags |= BIT_8;
3919                                 qlt_rdy_to_xfer(cmd);
3920                         }
3921                 } else {
3922                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3923                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
3924                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
3925                         goto out_reject;
3926                 }
3927                 break;
3928         default:
3929                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3930                     "qla_target(%d): Unknown srr_ui value %x",
3931                     vha->vp_idx, srr_ui);
3932                 goto out_reject;
3933         }
3934
3935         /* Transmit response in case of status and data-in cases */
3936         if (resp) {
3937                 cmd->cmd_flags |= BIT_7;
3938                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3939         }
3940
3941         return;
3942
3943 out_reject:
3944         spin_lock_irqsave(&ha->hardware_lock, flags);
3945         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3946             NOTIFY_ACK_SRR_FLAGS_REJECT,
3947             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3948             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3949         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3950                 cmd->state = QLA_TGT_STATE_DATA_IN;
3951                 dump_stack();
3952         } else {
3953                 cmd->cmd_flags |= BIT_9;
3954                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3955         }
3956         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3957 }
3958
3959 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3960         struct qla_tgt_srr_imm *imm, int ha_locked)
3961 {
3962         struct qla_hw_data *ha = vha->hw;
3963         unsigned long flags = 0;
3964
3965         if (!ha_locked)
3966                 spin_lock_irqsave(&ha->hardware_lock, flags);
3967
3968         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3969             NOTIFY_ACK_SRR_FLAGS_REJECT,
3970             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3971             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3972
3973         if (!ha_locked)
3974                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3975
3976         kfree(imm);
3977 }
3978
3979 static void qlt_handle_srr_work(struct work_struct *work)
3980 {
3981         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3982         struct scsi_qla_host *vha = tgt->vha;
3983         struct qla_tgt_srr_ctio *sctio;
3984         unsigned long flags;
3985
3986         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3987             tgt);
3988
3989 restart:
3990         spin_lock_irqsave(&tgt->srr_lock, flags);
3991         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3992                 struct qla_tgt_srr_imm *imm, *i, *ti;
3993                 struct qla_tgt_cmd *cmd;
3994                 struct se_cmd *se_cmd;
3995
3996                 imm = NULL;
3997                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3998                                                 srr_list_entry) {
3999                         if (i->srr_id == sctio->srr_id) {
4000                                 list_del(&i->srr_list_entry);
4001                                 if (imm) {
4002                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4003                                           "qla_target(%d): There must be "
4004                                           "only one IMM SRR per CTIO SRR "
4005                                           "(IMM SRR %p, id %d, CTIO %p\n",
4006                                           vha->vp_idx, i, i->srr_id, sctio);
4007                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4008                                 } else
4009                                         imm = i;
4010                         }
4011                 }
4012
4013                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4014                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4015                     sctio->srr_id);
4016
4017                 if (imm == NULL) {
4018                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4019                             "Not found matching IMM for SRR CTIO (id %d)\n",
4020                             sctio->srr_id);
4021                         continue;
4022                 } else
4023                         list_del(&sctio->srr_list_entry);
4024
4025                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4026
4027                 cmd = sctio->cmd;
4028                 /*
4029                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4030                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4031                  * logic..
4032                  */
4033                 cmd->offset = 0;
4034                 if (cmd->free_sg) {
4035                         kfree(cmd->sg);
4036                         cmd->sg = NULL;
4037                         cmd->free_sg = 0;
4038                 }
4039                 se_cmd = &cmd->se_cmd;
4040
4041                 cmd->sg_cnt = se_cmd->t_data_nents;
4042                 cmd->sg = se_cmd->t_data_sg;
4043
4044                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4045                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4046                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4047                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4048
4049                 qlt_handle_srr(vha, sctio, imm);
4050
4051                 kfree(imm);
4052                 kfree(sctio);
4053                 goto restart;
4054         }
4055         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4056 }
4057
4058 /* ha->hardware_lock supposed to be held on entry */
4059 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4060         struct imm_ntfy_from_isp *iocb)
4061 {
4062         struct qla_tgt_srr_imm *imm;
4063         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4064         struct qla_tgt_srr_ctio *sctio;
4065
4066         tgt->imm_srr_id++;
4067
4068         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4069             vha->vp_idx);
4070
4071         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4072         if (imm != NULL) {
4073                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4074
4075                 /* IRQ is already OFF */
4076                 spin_lock(&tgt->srr_lock);
4077                 imm->srr_id = tgt->imm_srr_id;
4078                 list_add_tail(&imm->srr_list_entry,
4079                     &tgt->srr_imm_list);
4080                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4081                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4082                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4083                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4084                         int found = 0;
4085                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4086                             srr_list_entry) {
4087                                 if (sctio->srr_id == imm->srr_id) {
4088                                         found = 1;
4089                                         break;
4090                                 }
4091                         }
4092                         if (found) {
4093                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4094                                     "Scheduling srr work\n");
4095                                 schedule_work(&tgt->srr_work);
4096                         } else {
4097                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4098                                     "qla_target(%d): imm_srr_id "
4099                                     "== ctio_srr_id (%d), but there is no "
4100                                     "corresponding SRR CTIO, deleting IMM "
4101                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4102                                     imm);
4103                                 list_del(&imm->srr_list_entry);
4104
4105                                 kfree(imm);
4106
4107                                 spin_unlock(&tgt->srr_lock);
4108                                 goto out_reject;
4109                         }
4110                 }
4111                 spin_unlock(&tgt->srr_lock);
4112         } else {
4113                 struct qla_tgt_srr_ctio *ts;
4114
4115                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4116                     "qla_target(%d): Unable to allocate SRR IMM "
4117                     "entry, SRR request will be rejected\n", vha->vp_idx);
4118
4119                 /* IRQ is already OFF */
4120                 spin_lock(&tgt->srr_lock);
4121                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4122                     srr_list_entry) {
4123                         if (sctio->srr_id == tgt->imm_srr_id) {
4124                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4125                                     "CTIO SRR %p deleted (id %d)\n",
4126                                     sctio, sctio->srr_id);
4127                                 list_del(&sctio->srr_list_entry);
4128                                 qlt_send_term_exchange(vha, sctio->cmd,
4129                                     &sctio->cmd->atio, 1);
4130                                 kfree(sctio);
4131                         }
4132                 }
4133                 spin_unlock(&tgt->srr_lock);
4134                 goto out_reject;
4135         }
4136
4137         return;
4138
4139 out_reject:
4140         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4141             NOTIFY_ACK_SRR_FLAGS_REJECT,
4142             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4143             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4144 }
4145
4146 /*
4147  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4148  */
4149 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4150         struct imm_ntfy_from_isp *iocb)
4151 {
4152         struct qla_hw_data *ha = vha->hw;
4153         uint32_t add_flags = 0;
4154         int send_notify_ack = 1;
4155         uint16_t status;
4156
4157         status = le16_to_cpu(iocb->u.isp2x.status);
4158         switch (status) {
4159         case IMM_NTFY_LIP_RESET:
4160         {
4161                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4162                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4163                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4164                     iocb->u.isp24.status_subcode);
4165
4166                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4167                         send_notify_ack = 0;
4168                 break;
4169         }
4170
4171         case IMM_NTFY_LIP_LINK_REINIT:
4172         {
4173                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4174                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4175                     "qla_target(%d): LINK REINIT (loop %#x, "
4176                     "subcode %x)\n", vha->vp_idx,
4177                     le16_to_cpu(iocb->u.isp24.nport_handle),
4178                     iocb->u.isp24.status_subcode);
4179                 if (tgt->link_reinit_iocb_pending) {
4180                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4181                             0, 0, 0, 0, 0, 0);
4182                 }
4183                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4184                 tgt->link_reinit_iocb_pending = 1;
4185                 /*
4186                  * QLogic requires to wait after LINK REINIT for possible
4187                  * PDISC or ADISC ELS commands
4188                  */
4189                 send_notify_ack = 0;
4190                 break;
4191         }
4192
4193         case IMM_NTFY_PORT_LOGOUT:
4194                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4195                     "qla_target(%d): Port logout (loop "
4196                     "%#x, subcode %x)\n", vha->vp_idx,
4197                     le16_to_cpu(iocb->u.isp24.nport_handle),
4198                     iocb->u.isp24.status_subcode);
4199
4200                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4201                         send_notify_ack = 0;
4202                 /* The sessions will be cleared in the callback, if needed */
4203                 break;
4204
4205         case IMM_NTFY_GLBL_TPRLO:
4206                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4207                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4208                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4209                         send_notify_ack = 0;
4210                 /* The sessions will be cleared in the callback, if needed */
4211                 break;
4212
4213         case IMM_NTFY_PORT_CONFIG:
4214                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4215                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4216                     status);
4217                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4218                         send_notify_ack = 0;
4219                 /* The sessions will be cleared in the callback, if needed */
4220                 break;
4221
4222         case IMM_NTFY_GLBL_LOGO:
4223                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4224                     "qla_target(%d): Link failure detected\n",
4225                     vha->vp_idx);
4226                 /* I_T nexus loss */
4227                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4228                         send_notify_ack = 0;
4229                 break;
4230
4231         case IMM_NTFY_IOCB_OVERFLOW:
4232                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4233                     "qla_target(%d): Cannot provide requested "
4234                     "capability (IOCB overflowed the immediate notify "
4235                     "resource count)\n", vha->vp_idx);
4236                 break;
4237
4238         case IMM_NTFY_ABORT_TASK:
4239                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4240                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4241                     "L %#x)\n", vha->vp_idx,
4242                     le16_to_cpu(iocb->u.isp2x.seq_id),
4243                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4244                     le16_to_cpu(iocb->u.isp2x.lun));
4245                 if (qlt_abort_task(vha, iocb) == 0)
4246                         send_notify_ack = 0;
4247                 break;
4248
4249         case IMM_NTFY_RESOURCE:
4250                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4251                     "qla_target(%d): Out of resources, host %ld\n",
4252                     vha->vp_idx, vha->host_no);
4253                 break;
4254
4255         case IMM_NTFY_MSG_RX:
4256                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4257                     "qla_target(%d): Immediate notify task %x\n",
4258                     vha->vp_idx, iocb->u.isp2x.task_flags);
4259                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4260                         send_notify_ack = 0;
4261                 break;
4262
4263         case IMM_NTFY_ELS:
4264                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4265                         send_notify_ack = 0;
4266                 break;
4267
4268         case IMM_NTFY_SRR:
4269                 qlt_prepare_srr_imm(vha, iocb);
4270                 send_notify_ack = 0;
4271                 break;
4272
4273         default:
4274                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4275                     "qla_target(%d): Received unknown immediate "
4276                     "notify status %x\n", vha->vp_idx, status);
4277                 break;
4278         }
4279
4280         if (send_notify_ack)
4281                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4282 }
4283
4284 /*
4285  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4286  * This function sends busy to ISP 2xxx or 24xx.
4287  */
4288 static int __qlt_send_busy(struct scsi_qla_host *vha,
4289         struct atio_from_isp *atio, uint16_t status)
4290 {
4291         struct ctio7_to_24xx *ctio24;
4292         struct qla_hw_data *ha = vha->hw;
4293         request_t *pkt;
4294         struct qla_tgt_sess *sess = NULL;
4295
4296         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4297             atio->u.isp24.fcp_hdr.s_id);
4298         if (!sess) {
4299                 qlt_send_term_exchange(vha, NULL, atio, 1);
4300                 return 0;
4301         }
4302         /* Sending marker isn't necessary, since we called from ISR */
4303
4304         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4305         if (!pkt) {
4306                 ql_dbg(ql_dbg_io, vha, 0x3063,
4307                     "qla_target(%d): %s failed: unable to allocate "
4308                     "request packet", vha->vp_idx, __func__);
4309                 return -ENOMEM;
4310         }
4311
4312         pkt->entry_count = 1;
4313         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4314
4315         ctio24 = (struct ctio7_to_24xx *)pkt;
4316         ctio24->entry_type = CTIO_TYPE7;
4317         ctio24->nport_handle = sess->loop_id;
4318         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4319         ctio24->vp_index = vha->vp_idx;
4320         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4321         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4322         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4323         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4324         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4325             __constant_cpu_to_le16(
4326                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4327                 CTIO7_FLAGS_DONT_RET_CTIO);
4328         /*
4329          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4330          * if the explicit conformation is used.
4331          */
4332         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4333         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4334         /* Memory Barrier */
4335         wmb();
4336         qla2x00_start_iocbs(vha, vha->req);
4337         return 0;
4338 }
4339
4340 /*
4341  * This routine is used to allocate a command for either a QFull condition
4342  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4343  * out previously.
4344  */
4345 static void
4346 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4347         struct atio_from_isp *atio, uint16_t status, int qfull)
4348 {
4349         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4350         struct qla_hw_data *ha = vha->hw;
4351         struct qla_tgt_sess *sess;
4352         struct se_session *se_sess;
4353         struct qla_tgt_cmd *cmd;
4354         int tag;
4355
4356         if (unlikely(tgt->tgt_stop)) {
4357                 ql_dbg(ql_dbg_io, vha, 0x300a,
4358                         "New command while device %p is shutting down\n", tgt);
4359                 return;
4360         }
4361
4362         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4363                 vha->hw->tgt.num_qfull_cmds_dropped++;
4364                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4365                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4366                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4367                                 vha->hw->tgt.num_qfull_cmds_dropped;
4368
4369                 ql_dbg(ql_dbg_io, vha, 0x3068,
4370                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4371                         vha->vp_idx, __func__,
4372                         vha->hw->tgt.num_qfull_cmds_dropped);
4373
4374                 qlt_chk_exch_leak_thresh_hold(vha);
4375                 return;
4376         }
4377
4378         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4379                 (vha, atio->u.isp24.fcp_hdr.s_id);
4380         if (!sess)
4381                 return;
4382
4383         se_sess = sess->se_sess;
4384
4385         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4386         if (tag < 0)
4387                 return;
4388
4389         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4390         if (!cmd) {
4391                 ql_dbg(ql_dbg_io, vha, 0x3009,
4392                         "qla_target(%d): %s: Allocation of cmd failed\n",
4393                         vha->vp_idx, __func__);
4394
4395                 vha->hw->tgt.num_qfull_cmds_dropped++;
4396                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4397                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4398                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4399                                 vha->hw->tgt.num_qfull_cmds_dropped;
4400
4401                 qlt_chk_exch_leak_thresh_hold(vha);
4402                 return;
4403         }
4404
4405         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4406
4407         qlt_incr_num_pend_cmds(vha);
4408         INIT_LIST_HEAD(&cmd->cmd_list);
4409         memcpy(&cmd->atio, atio, sizeof(*atio));
4410
4411         cmd->tgt = vha->vha_tgt.qla_tgt;
4412         cmd->vha = vha;
4413         cmd->reset_count = vha->hw->chip_reset;
4414         cmd->q_full = 1;
4415
4416         if (qfull) {
4417                 cmd->q_full = 1;
4418                 /* NOTE: borrowing the state field to carry the status */
4419                 cmd->state = status;
4420         } else
4421                 cmd->term_exchg = 1;
4422
4423         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
4424
4425         vha->hw->tgt.num_qfull_cmds_alloc++;
4426         if (vha->hw->tgt.num_qfull_cmds_alloc >
4427                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
4428                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
4429                         vha->hw->tgt.num_qfull_cmds_alloc;
4430 }
4431
4432 int
4433 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
4434 {
4435         struct qla_hw_data *ha = vha->hw;
4436         unsigned long flags;
4437         struct qla_tgt_cmd *cmd, *tcmd;
4438         struct list_head free_list;
4439         int rc = 0;
4440
4441         if (list_empty(&ha->tgt.q_full_list))
4442                 return 0;
4443
4444         INIT_LIST_HEAD(&free_list);
4445
4446         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
4447
4448         if (list_empty(&ha->tgt.q_full_list)) {
4449                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4450                 return 0;
4451         }
4452
4453         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
4454                 if (cmd->q_full)
4455                         /* cmd->state is a borrowed field to hold status */
4456                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
4457                 else if (cmd->term_exchg)
4458                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
4459
4460                 if (rc == -ENOMEM)
4461                         break;
4462
4463                 if (cmd->q_full)
4464                         ql_dbg(ql_dbg_io, vha, 0x3006,
4465                             "%s: busy sent for ox_id[%04x]\n", __func__,
4466                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4467                 else if (cmd->term_exchg)
4468                         ql_dbg(ql_dbg_io, vha, 0x3007,
4469                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
4470                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4471                 else
4472                         ql_dbg(ql_dbg_io, vha, 0x3008,
4473                             "%s: Unexpected cmd in QFull list %p\n", __func__,
4474                             cmd);
4475
4476                 list_del(&cmd->cmd_list);
4477                 list_add_tail(&cmd->cmd_list, &free_list);
4478
4479                 /* piggy back on hardware_lock for protection */
4480                 vha->hw->tgt.num_qfull_cmds_alloc--;
4481         }
4482         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4483
4484         cmd = NULL;
4485
4486         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
4487                 list_del(&cmd->cmd_list);
4488                 /* This cmd was never sent to TCM.  There is no need
4489                  * to schedule free or call free_cmd
4490                  */
4491                 qlt_free_cmd(cmd);
4492         }
4493         return rc;
4494 }
4495
4496 static void
4497 qlt_send_busy(struct scsi_qla_host *vha,
4498         struct atio_from_isp *atio, uint16_t status)
4499 {
4500         int rc = 0;
4501
4502         rc = __qlt_send_busy(vha, atio, status);
4503         if (rc == -ENOMEM)
4504                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
4505 }
4506
4507 static int
4508 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
4509         struct atio_from_isp *atio)
4510 {
4511         struct qla_hw_data *ha = vha->hw;
4512         uint16_t status;
4513
4514         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
4515                 return 0;
4516
4517         status = temp_sam_status;
4518         qlt_send_busy(vha, atio, status);
4519         return 1;
4520 }
4521
4522 /* ha->hardware_lock supposed to be held on entry */
4523 /* called via callback from qla2xxx */
4524 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4525         struct atio_from_isp *atio)
4526 {
4527         struct qla_hw_data *ha = vha->hw;
4528         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4529         int rc;
4530
4531         if (unlikely(tgt == NULL)) {
4532                 ql_dbg(ql_dbg_io, vha, 0x3064,
4533                     "ATIO pkt, but no tgt (ha %p)", ha);
4534                 return;
4535         }
4536         /*
4537          * In tgt_stop mode we also should allow all requests to pass.
4538          * Otherwise, some commands can stuck.
4539          */
4540
4541         tgt->irq_cmd_count++;
4542
4543         switch (atio->u.raw.entry_type) {
4544         case ATIO_TYPE7:
4545                 if (unlikely(atio->u.isp24.exchange_addr ==
4546                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4547                         ql_dbg(ql_dbg_io, vha, 0x3065,
4548                             "qla_target(%d): ATIO_TYPE7 "
4549                             "received with UNKNOWN exchange address, "
4550                             "sending QUEUE_FULL\n", vha->vp_idx);
4551                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4552                         break;
4553                 }
4554
4555
4556
4557                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
4558                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
4559                         if (rc != 0) {
4560                                 tgt->irq_cmd_count--;
4561                                 return;
4562                         }
4563                         rc = qlt_handle_cmd_for_atio(vha, atio);
4564                 } else {
4565                         rc = qlt_handle_task_mgmt(vha, atio);
4566                 }
4567                 if (unlikely(rc != 0)) {
4568                         if (rc == -ESRCH) {
4569 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4570                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4571 #else
4572                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4573 #endif
4574                         } else {
4575                                 if (tgt->tgt_stop) {
4576                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
4577                                             "qla_target: Unable to send "
4578                                             "command to target for req, "
4579                                             "ignoring.\n");
4580                                 } else {
4581                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4582                                             "qla_target(%d): Unable to send "
4583                                             "command to target, sending BUSY "
4584                                             "status.\n", vha->vp_idx);
4585                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4586                                 }
4587                         }
4588                 }
4589                 break;
4590
4591         case IMMED_NOTIFY_TYPE:
4592         {
4593                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4594                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4595                             "qla_target(%d): Received ATIO packet %x "
4596                             "with error status %x\n", vha->vp_idx,
4597                             atio->u.raw.entry_type,
4598                             atio->u.isp2x.entry_status);
4599                         break;
4600                 }
4601                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4602                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4603                 break;
4604         }
4605
4606         default:
4607                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4608                     "qla_target(%d): Received unknown ATIO atio "
4609                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4610                 break;
4611         }
4612
4613         tgt->irq_cmd_count--;
4614 }
4615
4616 /* ha->hardware_lock supposed to be held on entry */
4617 /* called via callback from qla2xxx */
4618 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4619 {
4620         struct qla_hw_data *ha = vha->hw;
4621         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4622
4623         if (unlikely(tgt == NULL)) {
4624                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4625                     "qla_target(%d): Response pkt %x received, but no "
4626                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4627                 return;
4628         }
4629
4630         /*
4631          * In tgt_stop mode we also should allow all requests to pass.
4632          * Otherwise, some commands can stuck.
4633          */
4634
4635         tgt->irq_cmd_count++;
4636
4637         switch (pkt->entry_type) {
4638         case CTIO_CRC2:
4639         case CTIO_TYPE7:
4640         {
4641                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4642                 qlt_do_ctio_completion(vha, entry->handle,
4643                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4644                     entry);
4645                 break;
4646         }
4647
4648         case ACCEPT_TGT_IO_TYPE:
4649         {
4650                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4651                 int rc;
4652                 if (atio->u.isp2x.status !=
4653                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4654                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4655                             "qla_target(%d): ATIO with error "
4656                             "status %x received\n", vha->vp_idx,
4657                             le16_to_cpu(atio->u.isp2x.status));
4658                         break;
4659                 }
4660
4661                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4662                 if (rc != 0) {
4663                         tgt->irq_cmd_count--;
4664                         return;
4665                 }
4666
4667                 rc = qlt_handle_cmd_for_atio(vha, atio);
4668                 if (unlikely(rc != 0)) {
4669                         if (rc == -ESRCH) {
4670 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4671                                 qlt_send_busy(vha, atio, 0);
4672 #else
4673                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4674 #endif
4675                         } else {
4676                                 if (tgt->tgt_stop) {
4677                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4678                                             "qla_target: Unable to send "
4679                                             "command to target, sending TERM "
4680                                             "EXCHANGE for rsp\n");
4681                                         qlt_send_term_exchange(vha, NULL,
4682                                             atio, 1);
4683                                 } else {
4684                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
4685                                             "qla_target(%d): Unable to send "
4686                                             "command to target, sending BUSY "
4687                                             "status\n", vha->vp_idx);
4688                                         qlt_send_busy(vha, atio, 0);
4689                                 }
4690                         }
4691                 }
4692         }
4693         break;
4694
4695         case CONTINUE_TGT_IO_TYPE:
4696         {
4697                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4698                 qlt_do_ctio_completion(vha, entry->handle,
4699                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4700                     entry);
4701                 break;
4702         }
4703
4704         case CTIO_A64_TYPE:
4705         {
4706                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4707                 qlt_do_ctio_completion(vha, entry->handle,
4708                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4709                     entry);
4710                 break;
4711         }
4712
4713         case IMMED_NOTIFY_TYPE:
4714                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4715                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4716                 break;
4717
4718         case NOTIFY_ACK_TYPE:
4719                 if (tgt->notify_ack_expected > 0) {
4720                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4721                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
4722                             "NOTIFY_ACK seq %08x status %x\n",
4723                             le16_to_cpu(entry->u.isp2x.seq_id),
4724                             le16_to_cpu(entry->u.isp2x.status));
4725                         tgt->notify_ack_expected--;
4726                         if (entry->u.isp2x.status !=
4727                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4728                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4729                                     "qla_target(%d): NOTIFY_ACK "
4730                                     "failed %x\n", vha->vp_idx,
4731                                     le16_to_cpu(entry->u.isp2x.status));
4732                         }
4733                 } else {
4734                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
4735                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4736                             vha->vp_idx);
4737                 }
4738                 break;
4739
4740         case ABTS_RECV_24XX:
4741                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4742                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4743                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4744                 break;
4745
4746         case ABTS_RESP_24XX:
4747                 if (tgt->abts_resp_expected > 0) {
4748                         struct abts_resp_from_24xx_fw *entry =
4749                                 (struct abts_resp_from_24xx_fw *)pkt;
4750                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
4751                             "ABTS_RESP_24XX: compl_status %x\n",
4752                             entry->compl_status);
4753                         tgt->abts_resp_expected--;
4754                         if (le16_to_cpu(entry->compl_status) !=
4755                             ABTS_RESP_COMPL_SUCCESS) {
4756                                 if ((entry->error_subcode1 == 0x1E) &&
4757                                     (entry->error_subcode2 == 0)) {
4758                                         /*
4759                                          * We've got a race here: aborted
4760                                          * exchange not terminated, i.e.
4761                                          * response for the aborted command was
4762                                          * sent between the abort request was
4763                                          * received and processed.
4764                                          * Unfortunately, the firmware has a
4765                                          * silly requirement that all aborted
4766                                          * exchanges must be explicitely
4767                                          * terminated, otherwise it refuses to
4768                                          * send responses for the abort
4769                                          * requests. So, we have to
4770                                          * (re)terminate the exchange and retry
4771                                          * the abort response.
4772                                          */
4773                                         qlt_24xx_retry_term_exchange(vha,
4774                                             entry);
4775                                 } else
4776                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
4777                                             "qla_target(%d): ABTS_RESP_24XX "
4778                                             "failed %x (subcode %x:%x)",
4779                                             vha->vp_idx, entry->compl_status,
4780                                             entry->error_subcode1,
4781                                             entry->error_subcode2);
4782                         }
4783                 } else {
4784                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
4785                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
4786                             "received\n", vha->vp_idx);
4787                 }
4788                 break;
4789
4790         default:
4791                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4792                     "qla_target(%d): Received unknown response pkt "
4793                     "type %x\n", vha->vp_idx, pkt->entry_type);
4794                 break;
4795         }
4796
4797         tgt->irq_cmd_count--;
4798 }
4799
4800 /*
4801  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4802  */
4803 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4804         uint16_t *mailbox)
4805 {
4806         struct qla_hw_data *ha = vha->hw;
4807         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4808         int login_code;
4809
4810         if (!ha->tgt.tgt_ops)
4811                 return;
4812
4813         if (unlikely(tgt == NULL)) {
4814                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4815                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4816                 return;
4817         }
4818
4819         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4820             IS_QLA2100(ha))
4821                 return;
4822         /*
4823          * In tgt_stop mode we also should allow all requests to pass.
4824          * Otherwise, some commands can stuck.
4825          */
4826
4827         tgt->irq_cmd_count++;
4828
4829         switch (code) {
4830         case MBA_RESET:                 /* Reset */
4831         case MBA_SYSTEM_ERR:            /* System Error */
4832         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
4833         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
4834                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4835                     "qla_target(%d): System error async event %#x "
4836                     "occurred", vha->vp_idx, code);
4837                 break;
4838         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
4839                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4840                 break;
4841
4842         case MBA_LOOP_UP:
4843         {
4844                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4845                     "qla_target(%d): Async LOOP_UP occurred "
4846                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4847                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4848                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4849                 if (tgt->link_reinit_iocb_pending) {
4850                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4851                             0, 0, 0, 0, 0, 0);
4852                         tgt->link_reinit_iocb_pending = 0;
4853                 }
4854                 break;
4855         }
4856
4857         case MBA_LIP_OCCURRED:
4858         case MBA_LOOP_DOWN:
4859         case MBA_LIP_RESET:
4860         case MBA_RSCN_UPDATE:
4861                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4862                     "qla_target(%d): Async event %#x occurred "
4863                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4864                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4865                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4866                 break;
4867
4868         case MBA_PORT_UPDATE:
4869                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4870                     "qla_target(%d): Port update async event %#x "
4871                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4872                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4873                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4874                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4875
4876                 login_code = le16_to_cpu(mailbox[2]);
4877                 if (login_code == 0x4)
4878                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4879                             "Async MB 2: Got PLOGI Complete\n");
4880                 else if (login_code == 0x7)
4881                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4882                             "Async MB 2: Port Logged Out\n");
4883                 break;
4884
4885         default:
4886                 break;
4887         }
4888
4889         tgt->irq_cmd_count--;
4890 }
4891
4892 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4893         uint16_t loop_id)
4894 {
4895         fc_port_t *fcport;
4896         int rc;
4897
4898         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4899         if (!fcport) {
4900                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4901                     "qla_target(%d): Allocation of tmp FC port failed",
4902                     vha->vp_idx);
4903                 return NULL;
4904         }
4905
4906         fcport->loop_id = loop_id;
4907
4908         rc = qla2x00_get_port_database(vha, fcport, 0);
4909         if (rc != QLA_SUCCESS) {
4910                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4911                     "qla_target(%d): Failed to retrieve fcport "
4912                     "information -- get_port_database() returned %x "
4913                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4914                 kfree(fcport);
4915                 return NULL;
4916         }
4917
4918         return fcport;
4919 }
4920
4921 /* Must be called under tgt_mutex */
4922 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4923         uint8_t *s_id)
4924 {
4925         struct qla_tgt_sess *sess = NULL;
4926         fc_port_t *fcport = NULL;
4927         int rc, global_resets;
4928         uint16_t loop_id = 0;
4929
4930 retry:
4931         global_resets =
4932             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4933
4934         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4935         if (rc != 0) {
4936                 if ((s_id[0] == 0xFF) &&
4937                     (s_id[1] == 0xFC)) {
4938                         /*
4939                          * This is Domain Controller, so it should be
4940                          * OK to drop SCSI commands from it.
4941                          */
4942                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4943                             "Unable to find initiator with S_ID %x:%x:%x",
4944                             s_id[0], s_id[1], s_id[2]);
4945                 } else
4946                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4947                             "qla_target(%d): Unable to find "
4948                             "initiator with S_ID %x:%x:%x",
4949                             vha->vp_idx, s_id[0], s_id[1],
4950                             s_id[2]);
4951                 return NULL;
4952         }
4953
4954         fcport = qlt_get_port_database(vha, loop_id);
4955         if (!fcport)
4956                 return NULL;
4957
4958         if (global_resets !=
4959             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4960                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4961                     "qla_target(%d): global reset during session discovery "
4962                     "(counter was %d, new %d), retrying", vha->vp_idx,
4963                     global_resets,
4964                     atomic_read(&vha->vha_tgt.
4965                         qla_tgt->tgt_global_resets_count));
4966                 goto retry;
4967         }
4968
4969         sess = qlt_create_sess(vha, fcport, true);
4970
4971         kfree(fcport);
4972         return sess;
4973 }
4974
4975 static void qlt_abort_work(struct qla_tgt *tgt,
4976         struct qla_tgt_sess_work_param *prm)
4977 {
4978         struct scsi_qla_host *vha = tgt->vha;
4979         struct qla_hw_data *ha = vha->hw;
4980         struct qla_tgt_sess *sess = NULL;
4981         unsigned long flags;
4982         uint32_t be_s_id;
4983         uint8_t s_id[3];
4984         int rc;
4985
4986         spin_lock_irqsave(&ha->hardware_lock, flags);
4987
4988         if (tgt->tgt_stop)
4989                 goto out_term;
4990
4991         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4992         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4993         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4994
4995         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4996             (unsigned char *)&be_s_id);
4997         if (!sess) {
4998                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4999
5000                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5001                 sess = qlt_make_local_sess(vha, s_id);
5002                 /* sess has got an extra creation ref */
5003                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5004
5005                 spin_lock_irqsave(&ha->hardware_lock, flags);
5006                 if (!sess)
5007                         goto out_term;
5008         } else {
5009                 kref_get(&sess->se_sess->sess_kref);
5010         }
5011
5012         if (tgt->tgt_stop)
5013                 goto out_term;
5014
5015         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5016         if (rc != 0)
5017                 goto out_term;
5018
5019         ha->tgt.tgt_ops->put_sess(sess);
5020         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5021         return;
5022
5023 out_term:
5024         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5025         if (sess)
5026                 ha->tgt.tgt_ops->put_sess(sess);
5027         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5028 }
5029
5030 static void qlt_tmr_work(struct qla_tgt *tgt,
5031         struct qla_tgt_sess_work_param *prm)
5032 {
5033         struct atio_from_isp *a = &prm->tm_iocb2;
5034         struct scsi_qla_host *vha = tgt->vha;
5035         struct qla_hw_data *ha = vha->hw;
5036         struct qla_tgt_sess *sess = NULL;
5037         unsigned long flags;
5038         uint8_t *s_id = NULL; /* to hide compiler warnings */
5039         int rc;
5040         uint32_t lun, unpacked_lun;
5041         int lun_size, fn;
5042         void *iocb;
5043
5044         spin_lock_irqsave(&ha->hardware_lock, flags);
5045
5046         if (tgt->tgt_stop)
5047                 goto out_term;
5048
5049         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5050         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5051         if (!sess) {
5052                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5053
5054                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5055                 sess = qlt_make_local_sess(vha, s_id);
5056                 /* sess has got an extra creation ref */
5057                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5058
5059                 spin_lock_irqsave(&ha->hardware_lock, flags);
5060                 if (!sess)
5061                         goto out_term;
5062         } else {
5063                 kref_get(&sess->se_sess->sess_kref);
5064         }
5065
5066         iocb = a;
5067         lun = a->u.isp24.fcp_cmnd.lun;
5068         lun_size = sizeof(lun);
5069         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5070         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5071
5072         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5073         if (rc != 0)
5074                 goto out_term;
5075
5076         ha->tgt.tgt_ops->put_sess(sess);
5077         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5078         return;
5079
5080 out_term:
5081         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5082         if (sess)
5083                 ha->tgt.tgt_ops->put_sess(sess);
5084         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5085 }
5086
5087 static void qlt_sess_work_fn(struct work_struct *work)
5088 {
5089         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5090         struct scsi_qla_host *vha = tgt->vha;
5091         unsigned long flags;
5092
5093         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5094
5095         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5096         while (!list_empty(&tgt->sess_works_list)) {
5097                 struct qla_tgt_sess_work_param *prm = list_entry(
5098                     tgt->sess_works_list.next, typeof(*prm),
5099                     sess_works_list_entry);
5100
5101                 /*
5102                  * This work can be scheduled on several CPUs at time, so we
5103                  * must delete the entry to eliminate double processing
5104                  */
5105                 list_del(&prm->sess_works_list_entry);
5106
5107                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5108
5109                 switch (prm->type) {
5110                 case QLA_TGT_SESS_WORK_ABORT:
5111                         qlt_abort_work(tgt, prm);
5112                         break;
5113                 case QLA_TGT_SESS_WORK_TM:
5114                         qlt_tmr_work(tgt, prm);
5115                         break;
5116                 default:
5117                         BUG_ON(1);
5118                         break;
5119                 }
5120
5121                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5122
5123                 kfree(prm);
5124         }
5125         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5126 }
5127
5128 /* Must be called under tgt_host_action_mutex */
5129 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5130 {
5131         struct qla_tgt *tgt;
5132
5133         if (!QLA_TGT_MODE_ENABLED())
5134                 return 0;
5135
5136         if (!IS_TGT_MODE_CAPABLE(ha)) {
5137                 ql_log(ql_log_warn, base_vha, 0xe070,
5138                     "This adapter does not support target mode.\n");
5139                 return 0;
5140         }
5141
5142         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5143             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5144
5145         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5146
5147         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5148         if (!tgt) {
5149                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5150                     "Unable to allocate struct qla_tgt\n");
5151                 return -ENOMEM;
5152         }
5153
5154         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5155                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5156
5157         tgt->ha = ha;
5158         tgt->vha = base_vha;
5159         init_waitqueue_head(&tgt->waitQ);
5160         INIT_LIST_HEAD(&tgt->sess_list);
5161         INIT_LIST_HEAD(&tgt->del_sess_list);
5162         INIT_DELAYED_WORK(&tgt->sess_del_work,
5163                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5164         spin_lock_init(&tgt->sess_work_lock);
5165         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5166         INIT_LIST_HEAD(&tgt->sess_works_list);
5167         spin_lock_init(&tgt->srr_lock);
5168         INIT_LIST_HEAD(&tgt->srr_ctio_list);
5169         INIT_LIST_HEAD(&tgt->srr_imm_list);
5170         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5171         atomic_set(&tgt->tgt_global_resets_count, 0);
5172
5173         base_vha->vha_tgt.qla_tgt = tgt;
5174
5175         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5176                 "qla_target(%d): using 64 Bit PCI addressing",
5177                 base_vha->vp_idx);
5178         tgt->tgt_enable_64bit_addr = 1;
5179         /* 3 is reserved */
5180         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5181         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5182         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5183
5184         if (base_vha->fc_vport)
5185                 return 0;
5186
5187         mutex_lock(&qla_tgt_mutex);
5188         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5189         mutex_unlock(&qla_tgt_mutex);
5190
5191         return 0;
5192 }
5193
5194 /* Must be called under tgt_host_action_mutex */
5195 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5196 {
5197         if (!vha->vha_tgt.qla_tgt)
5198                 return 0;
5199
5200         if (vha->fc_vport) {
5201                 qlt_release(vha->vha_tgt.qla_tgt);
5202                 return 0;
5203         }
5204
5205         /* free left over qfull cmds */
5206         qlt_init_term_exchange(vha);
5207
5208         mutex_lock(&qla_tgt_mutex);
5209         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5210         mutex_unlock(&qla_tgt_mutex);
5211
5212         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5213             vha->host_no, ha);
5214         qlt_release(vha->vha_tgt.qla_tgt);
5215
5216         return 0;
5217 }
5218
5219 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5220         unsigned char *b)
5221 {
5222         int i;
5223
5224         pr_debug("qla2xxx HW vha->node_name: ");
5225         for (i = 0; i < WWN_SIZE; i++)
5226                 pr_debug("%02x ", vha->node_name[i]);
5227         pr_debug("\n");
5228         pr_debug("qla2xxx HW vha->port_name: ");
5229         for (i = 0; i < WWN_SIZE; i++)
5230                 pr_debug("%02x ", vha->port_name[i]);
5231         pr_debug("\n");
5232
5233         pr_debug("qla2xxx passed configfs WWPN: ");
5234         put_unaligned_be64(wwpn, b);
5235         for (i = 0; i < WWN_SIZE; i++)
5236                 pr_debug("%02x ", b[i]);
5237         pr_debug("\n");
5238 }
5239
5240 /**
5241  * qla_tgt_lport_register - register lport with external module
5242  *
5243  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5244  * @wwpn: Passwd FC target WWPN
5245  * @callback:  lport initialization callback for tcm_qla2xxx code
5246  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5247  */
5248 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5249                        u64 npiv_wwpn, u64 npiv_wwnn,
5250                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5251 {
5252         struct qla_tgt *tgt;
5253         struct scsi_qla_host *vha;
5254         struct qla_hw_data *ha;
5255         struct Scsi_Host *host;
5256         unsigned long flags;
5257         int rc;
5258         u8 b[WWN_SIZE];
5259
5260         mutex_lock(&qla_tgt_mutex);
5261         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5262                 vha = tgt->vha;
5263                 ha = vha->hw;
5264
5265                 host = vha->host;
5266                 if (!host)
5267                         continue;
5268
5269                 if (!(host->hostt->supported_mode & MODE_TARGET))
5270                         continue;
5271
5272                 spin_lock_irqsave(&ha->hardware_lock, flags);
5273                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5274                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5275                             host->host_no);
5276                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5277                         continue;
5278                 }
5279                 if (tgt->tgt_stop) {
5280                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5281                                  host->host_no);
5282                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5283                         continue;
5284                 }
5285                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5286
5287                 if (!scsi_host_get(host)) {
5288                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
5289                             "Unable to scsi_host_get() for"
5290                             " qla2xxx scsi_host\n");
5291                         continue;
5292                 }
5293                 qlt_lport_dump(vha, phys_wwpn, b);
5294
5295                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5296                         scsi_host_put(host);
5297                         continue;
5298                 }
5299                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5300                 if (rc != 0)
5301                         scsi_host_put(host);
5302
5303                 mutex_unlock(&qla_tgt_mutex);
5304                 return rc;
5305         }
5306         mutex_unlock(&qla_tgt_mutex);
5307
5308         return -ENODEV;
5309 }
5310 EXPORT_SYMBOL(qlt_lport_register);
5311
5312 /**
5313  * qla_tgt_lport_deregister - Degister lport
5314  *
5315  * @vha:  Registered scsi_qla_host pointer
5316  */
5317 void qlt_lport_deregister(struct scsi_qla_host *vha)
5318 {
5319         struct qla_hw_data *ha = vha->hw;
5320         struct Scsi_Host *sh = vha->host;
5321         /*
5322          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5323          */
5324         vha->vha_tgt.target_lport_ptr = NULL;
5325         ha->tgt.tgt_ops = NULL;
5326         /*
5327          * Release the Scsi_Host reference for the underlying qla2xxx host
5328          */
5329         scsi_host_put(sh);
5330 }
5331 EXPORT_SYMBOL(qlt_lport_deregister);
5332
5333 /* Must be called under HW lock */
5334 static void qlt_set_mode(struct scsi_qla_host *vha)
5335 {
5336         struct qla_hw_data *ha = vha->hw;
5337
5338         switch (ql2x_ini_mode) {
5339         case QLA2XXX_INI_MODE_DISABLED:
5340         case QLA2XXX_INI_MODE_EXCLUSIVE:
5341                 vha->host->active_mode = MODE_TARGET;
5342                 break;
5343         case QLA2XXX_INI_MODE_ENABLED:
5344                 vha->host->active_mode |= MODE_TARGET;
5345                 break;
5346         default:
5347                 break;
5348         }
5349
5350         if (ha->tgt.ini_mode_force_reverse)
5351                 qla_reverse_ini_mode(vha);
5352 }
5353
5354 /* Must be called under HW lock */
5355 static void qlt_clear_mode(struct scsi_qla_host *vha)
5356 {
5357         struct qla_hw_data *ha = vha->hw;
5358
5359         switch (ql2x_ini_mode) {
5360         case QLA2XXX_INI_MODE_DISABLED:
5361                 vha->host->active_mode = MODE_UNKNOWN;
5362                 break;
5363         case QLA2XXX_INI_MODE_EXCLUSIVE:
5364                 vha->host->active_mode = MODE_INITIATOR;
5365                 break;
5366         case QLA2XXX_INI_MODE_ENABLED:
5367                 vha->host->active_mode &= ~MODE_TARGET;
5368                 break;
5369         default:
5370                 break;
5371         }
5372
5373         if (ha->tgt.ini_mode_force_reverse)
5374                 qla_reverse_ini_mode(vha);
5375 }
5376
5377 /*
5378  * qla_tgt_enable_vha - NO LOCK HELD
5379  *
5380  * host_reset, bring up w/ Target Mode Enabled
5381  */
5382 void
5383 qlt_enable_vha(struct scsi_qla_host *vha)
5384 {
5385         struct qla_hw_data *ha = vha->hw;
5386         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5387         unsigned long flags;
5388         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5389
5390         if (!tgt) {
5391                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5392                     "Unable to locate qla_tgt pointer from"
5393                     " struct qla_hw_data\n");
5394                 dump_stack();
5395                 return;
5396         }
5397
5398         spin_lock_irqsave(&ha->hardware_lock, flags);
5399         tgt->tgt_stopped = 0;
5400         qlt_set_mode(vha);
5401         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5402
5403         if (vha->vp_idx) {
5404                 qla24xx_disable_vp(vha);
5405                 qla24xx_enable_vp(vha);
5406         } else {
5407                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5408                 qla2xxx_wake_dpc(base_vha);
5409                 qla2x00_wait_for_hba_online(base_vha);
5410         }
5411 }
5412 EXPORT_SYMBOL(qlt_enable_vha);
5413
5414 /*
5415  * qla_tgt_disable_vha - NO LOCK HELD
5416  *
5417  * Disable Target Mode and reset the adapter
5418  */
5419 static void qlt_disable_vha(struct scsi_qla_host *vha)
5420 {
5421         struct qla_hw_data *ha = vha->hw;
5422         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5423         unsigned long flags;
5424
5425         if (!tgt) {
5426                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5427                     "Unable to locate qla_tgt pointer from"
5428                     " struct qla_hw_data\n");
5429                 dump_stack();
5430                 return;
5431         }
5432
5433         spin_lock_irqsave(&ha->hardware_lock, flags);
5434         qlt_clear_mode(vha);
5435         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5436
5437         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5438         qla2xxx_wake_dpc(vha);
5439         qla2x00_wait_for_hba_online(vha);
5440 }
5441
5442 /*
5443  * Called from qla_init.c:qla24xx_vport_create() contex to setup
5444  * the target mode specific struct scsi_qla_host and struct qla_hw_data
5445  * members.
5446  */
5447 void
5448 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5449 {
5450         if (!qla_tgt_mode_enabled(vha))
5451                 return;
5452
5453         vha->vha_tgt.qla_tgt = NULL;
5454
5455         mutex_init(&vha->vha_tgt.tgt_mutex);
5456         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5457
5458         qlt_clear_mode(vha);
5459
5460         /*
5461          * NOTE: Currently the value is kept the same for <24xx and
5462          * >=24xx ISPs. If it is necessary to change it,
5463          * the check should be added for specific ISPs,
5464          * assigning the value appropriately.
5465          */
5466         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5467
5468         qlt_add_target(ha, vha);
5469 }
5470
5471 void
5472 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5473 {
5474         /*
5475          * FC-4 Feature bit 0 indicates target functionality to the name server.
5476          */
5477         if (qla_tgt_mode_enabled(vha)) {
5478                 if (qla_ini_mode_enabled(vha))
5479                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5480                 else
5481                         ct_req->req.rff_id.fc4_feature = BIT_0;
5482         } else if (qla_ini_mode_enabled(vha)) {
5483                 ct_req->req.rff_id.fc4_feature = BIT_1;
5484         }
5485 }
5486
5487 /*
5488  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5489  * @ha: HA context
5490  *
5491  * Beginning of ATIO ring has initialization control block already built
5492  * by nvram config routine.
5493  *
5494  * Returns 0 on success.
5495  */
5496 void
5497 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5498 {
5499         struct qla_hw_data *ha = vha->hw;
5500         uint16_t cnt;
5501         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5502
5503         if (!qla_tgt_mode_enabled(vha))
5504                 return;
5505
5506         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5507                 pkt->u.raw.signature = ATIO_PROCESSED;
5508                 pkt++;
5509         }
5510
5511 }
5512
5513 /*
5514  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5515  * @ha: SCSI driver HA context
5516  */
5517 void
5518 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5519 {
5520         struct qla_hw_data *ha = vha->hw;
5521         struct atio_from_isp *pkt;
5522         int cnt, i;
5523
5524         if (!vha->flags.online)
5525                 return;
5526
5527         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5528                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5529                 cnt = pkt->u.raw.entry_count;
5530
5531                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5532
5533                 for (i = 0; i < cnt; i++) {
5534                         ha->tgt.atio_ring_index++;
5535                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5536                                 ha->tgt.atio_ring_index = 0;
5537                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5538                         } else
5539                                 ha->tgt.atio_ring_ptr++;
5540
5541                         pkt->u.raw.signature = ATIO_PROCESSED;
5542                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5543                 }
5544                 wmb();
5545         }
5546
5547         /* Adjust ring index */
5548         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5549 }
5550
5551 void
5552 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5553 {
5554         struct qla_hw_data *ha = vha->hw;
5555         if (!QLA_TGT_MODE_ENABLED())
5556                 return;
5557
5558         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5559         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5560         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5561
5562         if (IS_ATIO_MSIX_CAPABLE(ha)) {
5563                 struct qla_msix_entry *msix = &ha->msix_entries[2];
5564                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5565
5566                 icb->msix_atio = cpu_to_le16(msix->entry);
5567                 ql_dbg(ql_dbg_init, vha, 0xf072,
5568                     "Registering ICB vector 0x%x for atio que.\n",
5569                     msix->entry);
5570         }
5571 }
5572
5573 void
5574 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5575 {
5576         struct qla_hw_data *ha = vha->hw;
5577
5578         if (qla_tgt_mode_enabled(vha)) {
5579                 if (!ha->tgt.saved_set) {
5580                         /* We save only once */
5581                         ha->tgt.saved_exchange_count = nv->exchange_count;
5582                         ha->tgt.saved_firmware_options_1 =
5583                             nv->firmware_options_1;
5584                         ha->tgt.saved_firmware_options_2 =
5585                             nv->firmware_options_2;
5586                         ha->tgt.saved_firmware_options_3 =
5587                             nv->firmware_options_3;
5588                         ha->tgt.saved_set = 1;
5589                 }
5590
5591                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5592
5593                 /* Enable target mode */
5594                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5595
5596                 /* Disable ini mode, if requested */
5597                 if (!qla_ini_mode_enabled(vha))
5598                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5599
5600                 /* Disable Full Login after LIP */
5601                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5602                 /* Enable initial LIP */
5603                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5604                 if (ql2xtgt_tape_enable)
5605                         /* Enable FC Tape support */
5606                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5607                 else
5608                         /* Disable FC Tape support */
5609                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5610
5611                 /* Disable Full Login after LIP */
5612                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5613                 /* Enable target PRLI control */
5614                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5615         } else {
5616                 if (ha->tgt.saved_set) {
5617                         nv->exchange_count = ha->tgt.saved_exchange_count;
5618                         nv->firmware_options_1 =
5619                             ha->tgt.saved_firmware_options_1;
5620                         nv->firmware_options_2 =
5621                             ha->tgt.saved_firmware_options_2;
5622                         nv->firmware_options_3 =
5623                             ha->tgt.saved_firmware_options_3;
5624                 }
5625                 return;
5626         }
5627
5628         /* out-of-order frames reassembly */
5629         nv->firmware_options_3 |= BIT_6|BIT_9;
5630
5631         if (ha->tgt.enable_class_2) {
5632                 if (vha->flags.init_done)
5633                         fc_host_supported_classes(vha->host) =
5634                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5635
5636                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5637         } else {
5638                 if (vha->flags.init_done)
5639                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5640
5641                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5642         }
5643 }
5644
5645 void
5646 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5647         struct init_cb_24xx *icb)
5648 {
5649         struct qla_hw_data *ha = vha->hw;
5650
5651         if (ha->tgt.node_name_set) {
5652                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5653                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5654         }
5655 }
5656
5657 void
5658 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5659 {
5660         struct qla_hw_data *ha = vha->hw;
5661
5662         if (!QLA_TGT_MODE_ENABLED())
5663                 return;
5664
5665         if (qla_tgt_mode_enabled(vha)) {
5666                 if (!ha->tgt.saved_set) {
5667                         /* We save only once */
5668                         ha->tgt.saved_exchange_count = nv->exchange_count;
5669                         ha->tgt.saved_firmware_options_1 =
5670                             nv->firmware_options_1;
5671                         ha->tgt.saved_firmware_options_2 =
5672                             nv->firmware_options_2;
5673                         ha->tgt.saved_firmware_options_3 =
5674                             nv->firmware_options_3;
5675                         ha->tgt.saved_set = 1;
5676                 }
5677
5678                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5679
5680                 /* Enable target mode */
5681                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5682
5683                 /* Disable ini mode, if requested */
5684                 if (!qla_ini_mode_enabled(vha))
5685                         nv->firmware_options_1 |=
5686                             __constant_cpu_to_le32(BIT_5);
5687
5688                 /* Disable Full Login after LIP */
5689                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5690                 /* Enable initial LIP */
5691                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5692                 if (ql2xtgt_tape_enable)
5693                         /* Enable FC tape support */
5694                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5695                 else
5696                         /* Disable FC tape support */
5697                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5698
5699                 /* Disable Full Login after LIP */
5700                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5701                 /* Enable target PRLI control */
5702                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5703         } else {
5704                 if (ha->tgt.saved_set) {
5705                         nv->exchange_count = ha->tgt.saved_exchange_count;
5706                         nv->firmware_options_1 =
5707                             ha->tgt.saved_firmware_options_1;
5708                         nv->firmware_options_2 =
5709                             ha->tgt.saved_firmware_options_2;
5710                         nv->firmware_options_3 =
5711                             ha->tgt.saved_firmware_options_3;
5712                 }
5713                 return;
5714         }
5715
5716         /* out-of-order frames reassembly */
5717         nv->firmware_options_3 |= BIT_6|BIT_9;
5718
5719         if (ha->tgt.enable_class_2) {
5720                 if (vha->flags.init_done)
5721                         fc_host_supported_classes(vha->host) =
5722                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5723
5724                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5725         } else {
5726                 if (vha->flags.init_done)
5727                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5728
5729                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5730         }
5731 }
5732
5733 void
5734 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5735         struct init_cb_81xx *icb)
5736 {
5737         struct qla_hw_data *ha = vha->hw;
5738
5739         if (!QLA_TGT_MODE_ENABLED())
5740                 return;
5741
5742         if (ha->tgt.node_name_set) {
5743                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5744                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5745         }
5746 }
5747
5748 void
5749 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5750 {
5751         if (!QLA_TGT_MODE_ENABLED())
5752                 return;
5753
5754         ha->msix_count += 1; /* For ATIO Q */
5755 }
5756
5757 int
5758 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5759         struct sts_entry_24xx *pkt)
5760 {
5761         switch (pkt->entry_type) {
5762         case ABTS_RECV_24XX:
5763         case ABTS_RESP_24XX:
5764         case CTIO_TYPE7:
5765         case NOTIFY_ACK_TYPE:
5766         case CTIO_CRC2:
5767                 return 1;
5768         default:
5769                 return 0;
5770         }
5771 }
5772
5773 void
5774 qlt_modify_vp_config(struct scsi_qla_host *vha,
5775         struct vp_config_entry_24xx *vpmod)
5776 {
5777         if (qla_tgt_mode_enabled(vha))
5778                 vpmod->options_idx1 &= ~BIT_5;
5779         /* Disable ini mode, if requested */
5780         if (!qla_ini_mode_enabled(vha))
5781                 vpmod->options_idx1 &= ~BIT_4;
5782 }
5783
5784 void
5785 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5786 {
5787         if (!QLA_TGT_MODE_ENABLED())
5788                 return;
5789
5790         if  (ha->mqenable || IS_QLA83XX(ha)) {
5791                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5792                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5793         } else {
5794                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5795                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5796         }
5797
5798         mutex_init(&base_vha->vha_tgt.tgt_mutex);
5799         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5800         qlt_clear_mode(base_vha);
5801 }
5802
5803 irqreturn_t
5804 qla83xx_msix_atio_q(int irq, void *dev_id)
5805 {
5806         struct rsp_que *rsp;
5807         scsi_qla_host_t *vha;
5808         struct qla_hw_data *ha;
5809         unsigned long flags;
5810
5811         rsp = (struct rsp_que *) dev_id;
5812         ha = rsp->hw;
5813         vha = pci_get_drvdata(ha->pdev);
5814
5815         spin_lock_irqsave(&ha->hardware_lock, flags);
5816
5817         qlt_24xx_process_atio_queue(vha);
5818         qla24xx_process_response_queue(vha, rsp);
5819
5820         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5821
5822         return IRQ_HANDLED;
5823 }
5824
5825 int
5826 qlt_mem_alloc(struct qla_hw_data *ha)
5827 {
5828         if (!QLA_TGT_MODE_ENABLED())
5829                 return 0;
5830
5831         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5832             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5833         if (!ha->tgt.tgt_vp_map)
5834                 return -ENOMEM;
5835
5836         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5837             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5838             &ha->tgt.atio_dma, GFP_KERNEL);
5839         if (!ha->tgt.atio_ring) {
5840                 kfree(ha->tgt.tgt_vp_map);
5841                 return -ENOMEM;
5842         }
5843         return 0;
5844 }
5845
5846 void
5847 qlt_mem_free(struct qla_hw_data *ha)
5848 {
5849         if (!QLA_TGT_MODE_ENABLED())
5850                 return;
5851
5852         if (ha->tgt.atio_ring) {
5853                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5854                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5855                     ha->tgt.atio_dma);
5856         }
5857         kfree(ha->tgt.tgt_vp_map);
5858 }
5859
5860 /* vport_slock to be held by the caller */
5861 void
5862 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5863 {
5864         if (!QLA_TGT_MODE_ENABLED())
5865                 return;
5866
5867         switch (cmd) {
5868         case SET_VP_IDX:
5869                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5870                 break;
5871         case SET_AL_PA:
5872                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5873                 break;
5874         case RESET_VP_IDX:
5875                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5876                 break;
5877         case RESET_AL_PA:
5878                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5879                 break;
5880         }
5881 }
5882
5883 static int __init qlt_parse_ini_mode(void)
5884 {
5885         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5886                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5887         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5888                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5889         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5890                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5891         else
5892                 return false;
5893
5894         return true;
5895 }
5896
5897 int __init qlt_init(void)
5898 {
5899         int ret;
5900
5901         if (!qlt_parse_ini_mode()) {
5902                 ql_log(ql_log_fatal, NULL, 0xe06b,
5903                     "qlt_parse_ini_mode() failed\n");
5904                 return -EINVAL;
5905         }
5906
5907         if (!QLA_TGT_MODE_ENABLED())
5908                 return 0;
5909
5910         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5911             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5912             qla_tgt_mgmt_cmd), 0, NULL);
5913         if (!qla_tgt_mgmt_cmd_cachep) {
5914                 ql_log(ql_log_fatal, NULL, 0xe06d,
5915                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5916                 return -ENOMEM;
5917         }
5918
5919         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5920             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5921         if (!qla_tgt_mgmt_cmd_mempool) {
5922                 ql_log(ql_log_fatal, NULL, 0xe06e,
5923                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5924                 ret = -ENOMEM;
5925                 goto out_mgmt_cmd_cachep;
5926         }
5927
5928         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5929         if (!qla_tgt_wq) {
5930                 ql_log(ql_log_fatal, NULL, 0xe06f,
5931                     "alloc_workqueue for qla_tgt_wq failed\n");
5932                 ret = -ENOMEM;
5933                 goto out_cmd_mempool;
5934         }
5935         /*
5936          * Return 1 to signal that initiator-mode is being disabled
5937          */
5938         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5939
5940 out_cmd_mempool:
5941         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5942 out_mgmt_cmd_cachep:
5943         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5944         return ret;
5945 }
5946
5947 void qlt_exit(void)
5948 {
5949         if (!QLA_TGT_MODE_ENABLED())
5950                 return;
5951
5952         destroy_workqueue(qla_tgt_wq);
5953         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5954         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5955 }