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_hw_data *ha = vha->hw;
 786         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 787         struct qla_tgt_sess *sess;
 788         unsigned long flags;
 789
 790         if (!vha->hw->tgt.tgt_ops)
 791                 return;
 792
 793         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 794                 return;
 795
 796         spin_lock_irqsave(&ha->hardware_lock, flags);
 797         if (tgt->tgt_stop) {
 798                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 799                 return;
 800         }
 801         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 802         if (!sess) {
 803                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 804                 return;
 805         }
 806
 807         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 808
 809         sess->local = 1;
 810         qlt_schedule_sess_for_deletion(sess, false);
 811         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 812 }
 813
 814 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 815 {
 816         struct qla_hw_data *ha = tgt->ha;
 817         unsigned long flags;
 818         int res;
 819         /*
 820          * We need to protect against race, when tgt is freed before or
 821          * inside wake_up()
 822          */
 823         spin_lock_irqsave(&ha->hardware_lock, flags);
 824         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 825             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 826             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 827         res = (tgt->sess_count == 0);
 828         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 829
 830         return res;
 831 }
 832
 833 /* Called by tcm_qla2xxx configfs code */
 834 int qlt_stop_phase1(struct qla_tgt *tgt)
 835 {
 836         struct scsi_qla_host *vha = tgt->vha;
 837         struct qla_hw_data *ha = tgt->ha;
 838         unsigned long flags;
 839
 840         mutex_lock(&qla_tgt_mutex);
 841         if (!vha->fc_vport) {
 842                 struct Scsi_Host *sh = vha->host;
 843                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 844                 bool npiv_vports;
 845
 846                 spin_lock_irqsave(sh->host_lock, flags);
 847                 npiv_vports = (fc_host->npiv_vports_inuse);
 848                 spin_unlock_irqrestore(sh->host_lock, flags);
 849
 850                 if (npiv_vports) {
 851                         mutex_unlock(&qla_tgt_mutex);
 852                         return -EPERM;
 853                 }
 854         }
 855         if (tgt->tgt_stop || tgt->tgt_stopped) {
 856                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 857                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 858                 mutex_unlock(&qla_tgt_mutex);
 859                 return -EPERM;
 860         }
 861
 862         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 863             vha->host_no, vha);
 864         /*
 865          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 866          * Lock is needed, because we still can get an incoming packet.
 867          */
 868         mutex_lock(&vha->vha_tgt.tgt_mutex);
 869         spin_lock_irqsave(&ha->hardware_lock, flags);
 870         tgt->tgt_stop = 1;
 871         qlt_clear_tgt_db(tgt);
 872         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 873         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 874         mutex_unlock(&qla_tgt_mutex);
 875
 876         flush_delayed_work(&tgt->sess_del_work);
 877
 878         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 879             "Waiting for sess works (tgt %p)", tgt);
 880         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 881         while (!list_empty(&tgt->sess_works_list)) {
 882                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 883                 flush_scheduled_work();
 884                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 885         }
 886         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 887
 888         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 889             "Waiting for tgt %p: list_empty(sess_list)=%d "
 890             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 891             tgt->sess_count);
 892
 893         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 894
 895         /* Big hammer */
 896         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 897                 qlt_disable_vha(vha);
 898
 899         /* Wait for sessions to clear out (just in case) */
 900         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 901         return 0;
 902 }
 903 EXPORT_SYMBOL(qlt_stop_phase1);
 904
 905 /* Called by tcm_qla2xxx configfs code */
 906 void qlt_stop_phase2(struct qla_tgt *tgt)
 907 {
 908         struct qla_hw_data *ha = tgt->ha;
 909         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 910         unsigned long flags;
 911
 912         if (tgt->tgt_stopped) {
 913                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
 914                     "Already in tgt->tgt_stopped state\n");
 915                 dump_stack();
 916                 return;
 917         }
 918
 919         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
 920             "Waiting for %d IRQ commands to complete (tgt %p)",
 921             tgt->irq_cmd_count, tgt);
 922
 923         mutex_lock(&vha->vha_tgt.tgt_mutex);
 924         spin_lock_irqsave(&ha->hardware_lock, flags);
 925         while (tgt->irq_cmd_count != 0) {
 926                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 927                 udelay(2);
 928                 spin_lock_irqsave(&ha->hardware_lock, flags);
 929         }
 930         tgt->tgt_stop = 0;
 931         tgt->tgt_stopped = 1;
 932         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 933         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 934
 935         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
 936             tgt);
 937 }
 938 EXPORT_SYMBOL(qlt_stop_phase2);
 939
 940 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 941 static void qlt_release(struct qla_tgt *tgt)
 942 {
 943         scsi_qla_host_t *vha = tgt->vha;
 944
 945         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 946                 qlt_stop_phase2(tgt);
 947
 948         vha->vha_tgt.qla_tgt = NULL;
 949
 950         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
 951             "Release of tgt %p finished\n", tgt);
 952
 953         kfree(tgt);
 954 }
 955
 956 /* ha->hardware_lock supposed to be held on entry */
 957 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 958         const void *param, unsigned int param_size)
 959 {
 960         struct qla_tgt_sess_work_param *prm;
 961         unsigned long flags;
 962
 963         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 964         if (!prm) {
 965                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 966                     "qla_target(%d): Unable to create session "
 967                     "work, command will be refused", 0);
 968                 return -ENOMEM;
 969         }
 970
 971         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 972             "Scheduling work (type %d, prm %p)"
 973             " to find session for param %p (size %d, tgt %p)\n",
 974             type, prm, param, param_size, tgt);
 975
 976         prm->type = type;
 977         memcpy(&prm->tm_iocb, param, param_size);
 978
 979         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 980         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 981         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 982
 983         schedule_work(&tgt->sess_work);
 984
 985         return 0;
 986 }
 987
 988 /*
 989  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 990  */
 991 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 992         struct imm_ntfy_from_isp *ntfy,
 993         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 994         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 995 {
 996         struct qla_hw_data *ha = vha->hw;
 997         request_t *pkt;
 998         struct nack_to_isp *nack;
 999
1000         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1001
1002         /* Send marker if required */
1003         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1004                 return;
1005
1006         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1007         if (!pkt) {
1008                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1009                     "qla_target(%d): %s failed: unable to allocate "
1010                     "request packet\n", vha->vp_idx, __func__);
1011                 return;
1012         }
1013
1014         if (vha->vha_tgt.qla_tgt != NULL)
1015                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1016
1017         pkt->entry_type = NOTIFY_ACK_TYPE;
1018         pkt->entry_count = 1;
1019
1020         nack = (struct nack_to_isp *)pkt;
1021         nack->ox_id = ntfy->ox_id;
1022
1023         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1024         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1025                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1026                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1027         }
1028         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1029         nack->u.isp24.status = ntfy->u.isp24.status;
1030         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1031         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1032         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1033         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1034         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1035         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1036         nack->u.isp24.srr_reject_code = srr_reject_code;
1037         nack->u.isp24.srr_reject_code_expl = srr_explan;
1038         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1039
1040         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1041             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1042             vha->vp_idx, nack->u.isp24.status);
1043
1044         /* Memory Barrier */
1045         wmb();
1046         qla2x00_start_iocbs(vha, vha->req);
1047 }
1048
1049 /*
1050  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1051  */
1052 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1053         struct abts_recv_from_24xx *abts, uint32_t status,
1054         bool ids_reversed)
1055 {
1056         struct qla_hw_data *ha = vha->hw;
1057         struct abts_resp_to_24xx *resp;
1058         uint32_t f_ctl;
1059         uint8_t *p;
1060
1061         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1062             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1063             ha, abts, status);
1064
1065         /* Send marker if required */
1066         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1067                 return;
1068
1069         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1070         if (!resp) {
1071                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1072                     "qla_target(%d): %s failed: unable to allocate "
1073                     "request packet", vha->vp_idx, __func__);
1074                 return;
1075         }
1076
1077         resp->entry_type = ABTS_RESP_24XX;
1078         resp->entry_count = 1;
1079         resp->nport_handle = abts->nport_handle;
1080         resp->vp_index = vha->vp_idx;
1081         resp->sof_type = abts->sof_type;
1082         resp->exchange_address = abts->exchange_address;
1083         resp->fcp_hdr_le = abts->fcp_hdr_le;
1084         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1085             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1086             F_CTL_SEQ_INITIATIVE);
1087         p = (uint8_t *)&f_ctl;
1088         resp->fcp_hdr_le.f_ctl[0] = *p++;
1089         resp->fcp_hdr_le.f_ctl[1] = *p++;
1090         resp->fcp_hdr_le.f_ctl[2] = *p;
1091         if (ids_reversed) {
1092                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1093                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1094                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1095                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1096                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1097                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1098         } else {
1099                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1100                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1101                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1102                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1103                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1104                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1105         }
1106         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1107         if (status == FCP_TMF_CMPL) {
1108                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1109                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1110                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1111                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1112                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1113                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1114         } else {
1115                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1116                 resp->payload.ba_rjt.reason_code =
1117                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1118                 /* Other bytes are zero */
1119         }
1120
1121         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1122
1123         /* Memory Barrier */
1124         wmb();
1125         qla2x00_start_iocbs(vha, vha->req);
1126 }
1127
1128 /*
1129  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1130  */
1131 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1132         struct abts_resp_from_24xx_fw *entry)
1133 {
1134         struct ctio7_to_24xx *ctio;
1135
1136         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1137             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1138         /* Send marker if required */
1139         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1140                 return;
1141
1142         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1143         if (ctio == NULL) {
1144                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1145                     "qla_target(%d): %s failed: unable to allocate "
1146                     "request packet\n", vha->vp_idx, __func__);
1147                 return;
1148         }
1149
1150         /*
1151          * We've got on entrance firmware's response on by us generated
1152          * ABTS response. So, in it ID fields are reversed.
1153          */
1154
1155         ctio->entry_type = CTIO_TYPE7;
1156         ctio->entry_count = 1;
1157         ctio->nport_handle = entry->nport_handle;
1158         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1159         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1160         ctio->vp_index = vha->vp_idx;
1161         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1162         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1163         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1164         ctio->exchange_addr = entry->exchange_addr_to_abort;
1165         ctio->u.status1.flags =
1166             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1167                 CTIO7_FLAGS_TERMINATE);
1168         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1169
1170         /* Memory Barrier */
1171         wmb();
1172         qla2x00_start_iocbs(vha, vha->req);
1173
1174         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1175             FCP_TMF_CMPL, true);
1176 }
1177
1178 /* ha->hardware_lock supposed to be held on entry */
1179 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1180         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1181 {
1182         struct qla_hw_data *ha = vha->hw;
1183         struct se_session *se_sess = sess->se_sess;
1184         struct qla_tgt_mgmt_cmd *mcmd;
1185         struct se_cmd *se_cmd;
1186         u32 lun = 0;
1187         int rc;
1188         bool found_lun = false;
1189
1190         spin_lock(&se_sess->sess_cmd_lock);
1191         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1192                 struct qla_tgt_cmd *cmd =
1193                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1194                 if (cmd->tag == abts->exchange_addr_to_abort) {
1195                         lun = cmd->unpacked_lun;
1196                         found_lun = true;
1197                         break;
1198                 }
1199         }
1200         spin_unlock(&se_sess->sess_cmd_lock);
1201
1202         if (!found_lun)
1203                 return -ENOENT;
1204
1205         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1206             "qla_target(%d): task abort (tag=%d)\n",
1207             vha->vp_idx, abts->exchange_addr_to_abort);
1208
1209         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1210         if (mcmd == NULL) {
1211                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1212                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1213                     vha->vp_idx, __func__);
1214                 return -ENOMEM;
1215         }
1216         memset(mcmd, 0, sizeof(*mcmd));
1217
1218         mcmd->sess = sess;
1219         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1220         mcmd->reset_count = vha->hw->chip_reset;
1221
1222         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1223             abts->exchange_addr_to_abort);
1224         if (rc != 0) {
1225                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1226                     "qla_target(%d):  tgt_ops->handle_tmr()"
1227                     " failed: %d", vha->vp_idx, rc);
1228                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1229                 return -EFAULT;
1230         }
1231
1232         return 0;
1233 }
1234
1235 /*
1236  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1237  */
1238 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1239         struct abts_recv_from_24xx *abts)
1240 {
1241         struct qla_hw_data *ha = vha->hw;
1242         struct qla_tgt_sess *sess;
1243         uint32_t tag = abts->exchange_addr_to_abort;
1244         uint8_t s_id[3];
1245         int rc;
1246
1247         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1248                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1249                     "qla_target(%d): ABTS: Abort Sequence not "
1250                     "supported\n", vha->vp_idx);
1251                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1252                 return;
1253         }
1254
1255         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1256                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1257                     "qla_target(%d): ABTS: Unknown Exchange "
1258                     "Address received\n", vha->vp_idx);
1259                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1260                 return;
1261         }
1262
1263         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1264             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1265             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1266             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1267             le32_to_cpu(abts->fcp_hdr_le.parameter));
1268
1269         s_id[0] = abts->fcp_hdr_le.s_id[2];
1270         s_id[1] = abts->fcp_hdr_le.s_id[1];
1271         s_id[2] = abts->fcp_hdr_le.s_id[0];
1272
1273         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1274         if (!sess) {
1275                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1276                     "qla_target(%d): task abort for non-existant session\n",
1277                     vha->vp_idx);
1278                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1279                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1280                 if (rc != 0) {
1281                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1282                             false);
1283                 }
1284                 return;
1285         }
1286
1287         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1288         if (rc != 0) {
1289                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1290                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1291                     vha->vp_idx, rc);
1292                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1293                 return;
1294         }
1295 }
1296
1297 /*
1298  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1299  */
1300 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1301         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1302 {
1303         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1304         struct ctio7_to_24xx *ctio;
1305         uint16_t temp;
1306
1307         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1308             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1309             ha, atio, resp_code);
1310
1311         /* Send marker if required */
1312         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1313                 return;
1314
1315         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1316         if (ctio == NULL) {
1317                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1318                     "qla_target(%d): %s failed: unable to allocate "
1319                     "request packet\n", ha->vp_idx, __func__);
1320                 return;
1321         }
1322
1323         ctio->entry_type = CTIO_TYPE7;
1324         ctio->entry_count = 1;
1325         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1326         ctio->nport_handle = mcmd->sess->loop_id;
1327         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1328         ctio->vp_index = ha->vp_idx;
1329         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1330         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1331         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1332         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1333         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1334             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1335                 CTIO7_FLAGS_SEND_STATUS);
1336         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1337         ctio->u.status1.ox_id = cpu_to_le16(temp);
1338         ctio->u.status1.scsi_status =
1339             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1340         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1341         ctio->u.status1.sense_data[0] = resp_code;
1342
1343         /* Memory Barrier */
1344         wmb();
1345         qla2x00_start_iocbs(ha, ha->req);
1346 }
1347
1348 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1349 {
1350         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1351 }
1352 EXPORT_SYMBOL(qlt_free_mcmd);
1353
1354 /* callback from target fabric module code */
1355 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1356 {
1357         struct scsi_qla_host *vha = mcmd->sess->vha;
1358         struct qla_hw_data *ha = vha->hw;
1359         unsigned long flags;
1360
1361         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1362             "TM response mcmd (%p) status %#x state %#x",
1363             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1364
1365         spin_lock_irqsave(&ha->hardware_lock, flags);
1366
1367         if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1368                 /*
1369                  * Either a chip reset is active or this request was from
1370                  * previous life, just abort the processing.
1371                  */
1372                 ql_dbg(ql_dbg_async, vha, 0xe100,
1373                         "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1374                         qla2x00_reset_active(vha), mcmd->reset_count,
1375                         ha->chip_reset);
1376                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1377                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1378                 return;
1379         }
1380
1381         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1382                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1383                     0, 0, 0, 0, 0, 0);
1384         else {
1385                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1386                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1387                             mcmd->fc_tm_rsp, false);
1388                 else
1389                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1390                             mcmd->fc_tm_rsp);
1391         }
1392         /*
1393          * Make the callback for ->free_mcmd() to queue_work() and invoke
1394          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1395          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1396          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1397          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1398          * qlt_xmit_tm_rsp() returns here..
1399          */
1400         ha->tgt.tgt_ops->free_mcmd(mcmd);
1401         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1402 }
1403 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1404
1405 /* No locks */
1406 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1407 {
1408         struct qla_tgt_cmd *cmd = prm->cmd;
1409
1410         BUG_ON(cmd->sg_cnt == 0);
1411
1412         prm->sg = (struct scatterlist *)cmd->sg;
1413         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1414             cmd->sg_cnt, cmd->dma_data_direction);
1415         if (unlikely(prm->seg_cnt == 0))
1416                 goto out_err;
1417
1418         prm->cmd->sg_mapped = 1;
1419
1420         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1421                 /*
1422                  * If greater than four sg entries then we need to allocate
1423                  * the continuation entries
1424                  */
1425                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1426                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1427                         prm->tgt->datasegs_per_cmd,
1428                         prm->tgt->datasegs_per_cont);
1429         } else {
1430                 /* DIF */
1431                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1432                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1433                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1434                         prm->tot_dsds = prm->seg_cnt;
1435                 } else
1436                         prm->tot_dsds = prm->seg_cnt;
1437
1438                 if (cmd->prot_sg_cnt) {
1439                         prm->prot_sg      = cmd->prot_sg;
1440                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1441                                 cmd->prot_sg, cmd->prot_sg_cnt,
1442                                 cmd->dma_data_direction);
1443                         if (unlikely(prm->prot_seg_cnt == 0))
1444                                 goto out_err;
1445
1446                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1447                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1448                                 /* Dif Bundling not support here */
1449                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1450                                                                 cmd->blk_sz);
1451                                 prm->tot_dsds += prm->prot_seg_cnt;
1452                         } else
1453                                 prm->tot_dsds += prm->prot_seg_cnt;
1454                 }
1455         }
1456
1457         return 0;
1458
1459 out_err:
1460         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1461             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1462             0, prm->cmd->sg_cnt);
1463         return -1;
1464 }
1465
1466 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1467 {
1468         struct qla_hw_data *ha = vha->hw;
1469
1470         if (!cmd->sg_mapped)
1471                 return;
1472
1473         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1474         cmd->sg_mapped = 0;
1475
1476         if (cmd->prot_sg_cnt)
1477                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1478                         cmd->dma_data_direction);
1479
1480         if (cmd->ctx_dsd_alloced)
1481                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1482
1483         if (cmd->ctx)
1484                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1485 }
1486
1487 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1488         uint32_t req_cnt)
1489 {
1490         uint32_t cnt, cnt_in;
1491
1492         if (vha->req->cnt < (req_cnt + 2)) {
1493                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1494                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1495
1496                 if  (vha->req->ring_index < cnt)
1497                         vha->req->cnt = cnt - vha->req->ring_index;
1498                 else
1499                         vha->req->cnt = vha->req->length -
1500                             (vha->req->ring_index - cnt);
1501         }
1502
1503         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1504                 ql_dbg(ql_dbg_io, vha, 0x305a,
1505                     "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",
1506                     vha->vp_idx, vha->req->ring_index,
1507                     vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1508                 return -EAGAIN;
1509         }
1510         vha->req->cnt -= req_cnt;
1511
1512         return 0;
1513 }
1514
1515 /*
1516  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1517  */
1518 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1519 {
1520         /* Adjust ring index. */
1521         vha->req->ring_index++;
1522         if (vha->req->ring_index == vha->req->length) {
1523                 vha->req->ring_index = 0;
1524                 vha->req->ring_ptr = vha->req->ring;
1525         } else {
1526                 vha->req->ring_ptr++;
1527         }
1528         return (cont_entry_t *)vha->req->ring_ptr;
1529 }
1530
1531 /* ha->hardware_lock supposed to be held on entry */
1532 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1533 {
1534         struct qla_hw_data *ha = vha->hw;
1535         uint32_t h;
1536
1537         h = ha->tgt.current_handle;
1538         /* always increment cmd handle */
1539         do {
1540                 ++h;
1541                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1542                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1543                 if (h == ha->tgt.current_handle) {
1544                         ql_dbg(ql_dbg_io, vha, 0x305b,
1545                             "qla_target(%d): Ran out of "
1546                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1547                         h = QLA_TGT_NULL_HANDLE;
1548                         break;
1549                 }
1550         } while ((h == QLA_TGT_NULL_HANDLE) ||
1551             (h == QLA_TGT_SKIP_HANDLE) ||
1552             (ha->tgt.cmds[h-1] != NULL));
1553
1554         if (h != QLA_TGT_NULL_HANDLE)
1555                 ha->tgt.current_handle = h;
1556
1557         return h;
1558 }
1559
1560 /* ha->hardware_lock supposed to be held on entry */
1561 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1562         struct scsi_qla_host *vha)
1563 {
1564         uint32_t h;
1565         struct ctio7_to_24xx *pkt;
1566         struct qla_hw_data *ha = vha->hw;
1567         struct atio_from_isp *atio = &prm->cmd->atio;
1568         uint16_t temp;
1569
1570         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1571         prm->pkt = pkt;
1572         memset(pkt, 0, sizeof(*pkt));
1573
1574         pkt->entry_type = CTIO_TYPE7;
1575         pkt->entry_count = (uint8_t)prm->req_cnt;
1576         pkt->vp_index = vha->vp_idx;
1577
1578         h = qlt_make_handle(vha);
1579         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1580                 /*
1581                  * CTIO type 7 from the firmware doesn't provide a way to
1582                  * know the initiator's LOOP ID, hence we can't find
1583                  * the session and, so, the command.
1584                  */
1585                 return -EAGAIN;
1586         } else
1587                 ha->tgt.cmds[h-1] = prm->cmd;
1588
1589         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1590         pkt->nport_handle = prm->cmd->loop_id;
1591         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1592         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1593         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1594         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1595         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1596         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1597         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1598         pkt->u.status0.ox_id = cpu_to_le16(temp);
1599         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1600
1601         return 0;
1602 }
1603
1604 /*
1605  * ha->hardware_lock supposed to be held on entry. We have already made sure
1606  * that there is sufficient amount of request entries to not drop it.
1607  */
1608 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1609         struct scsi_qla_host *vha)
1610 {
1611         int cnt;
1612         uint32_t *dword_ptr;
1613         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1614
1615         /* Build continuation packets */
1616         while (prm->seg_cnt > 0) {
1617                 cont_a64_entry_t *cont_pkt64 =
1618                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1619
1620                 /*
1621                  * Make sure that from cont_pkt64 none of
1622                  * 64-bit specific fields used for 32-bit
1623                  * addressing. Cast to (cont_entry_t *) for
1624                  * that.
1625                  */
1626
1627                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1628
1629                 cont_pkt64->entry_count = 1;
1630                 cont_pkt64->sys_define = 0;
1631
1632                 if (enable_64bit_addressing) {
1633                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1634                         dword_ptr =
1635                             (uint32_t *)&cont_pkt64->dseg_0_address;
1636                 } else {
1637                         cont_pkt64->entry_type = CONTINUE_TYPE;
1638                         dword_ptr =
1639                             (uint32_t *)&((cont_entry_t *)
1640                                 cont_pkt64)->dseg_0_address;
1641                 }
1642
1643                 /* Load continuation entry data segments */
1644                 for (cnt = 0;
1645                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1646                     cnt++, prm->seg_cnt--) {
1647                         *dword_ptr++ =
1648                             cpu_to_le32(pci_dma_lo32
1649                                 (sg_dma_address(prm->sg)));
1650                         if (enable_64bit_addressing) {
1651                                 *dword_ptr++ =
1652                                     cpu_to_le32(pci_dma_hi32
1653                                         (sg_dma_address
1654                                         (prm->sg)));
1655                         }
1656                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1657
1658                         prm->sg = sg_next(prm->sg);
1659                 }
1660         }
1661 }
1662
1663 /*
1664  * ha->hardware_lock supposed to be held on entry. We have already made sure
1665  * that there is sufficient amount of request entries to not drop it.
1666  */
1667 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1668         struct scsi_qla_host *vha)
1669 {
1670         int cnt;
1671         uint32_t *dword_ptr;
1672         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1673         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1674
1675         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1676
1677         /* Setup packet address segment pointer */
1678         dword_ptr = pkt24->u.status0.dseg_0_address;
1679
1680         /* Set total data segment count */
1681         if (prm->seg_cnt)
1682                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1683
1684         if (prm->seg_cnt == 0) {
1685                 /* No data transfer */
1686                 *dword_ptr++ = 0;
1687                 *dword_ptr = 0;
1688                 return;
1689         }
1690
1691         /* If scatter gather */
1692
1693         /* Load command entry data segments */
1694         for (cnt = 0;
1695             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1696             cnt++, prm->seg_cnt--) {
1697                 *dword_ptr++ =
1698                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1699                 if (enable_64bit_addressing) {
1700                         *dword_ptr++ =
1701                             cpu_to_le32(pci_dma_hi32(
1702                                 sg_dma_address(prm->sg)));
1703                 }
1704                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1705
1706                 prm->sg = sg_next(prm->sg);
1707         }
1708
1709         qlt_load_cont_data_segments(prm, vha);
1710 }
1711
1712 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1713 {
1714         return cmd->bufflen > 0;
1715 }
1716
1717 /*
1718  * Called without ha->hardware_lock held
1719  */
1720 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1721         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1722         uint32_t *full_req_cnt)
1723 {
1724         struct qla_tgt *tgt = cmd->tgt;
1725         struct scsi_qla_host *vha = tgt->vha;
1726         struct qla_hw_data *ha = vha->hw;
1727         struct se_cmd *se_cmd = &cmd->se_cmd;
1728
1729         if (unlikely(cmd->aborted)) {
1730                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1731                     "qla_target(%d): terminating exchange "
1732                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1733                     se_cmd, cmd->tag);
1734
1735                 cmd->state = QLA_TGT_STATE_ABORTED;
1736                 cmd->cmd_flags |= BIT_6;
1737
1738                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1739
1740                 /* !! At this point cmd could be already freed !! */
1741                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1742         }
1743
1744         prm->cmd = cmd;
1745         prm->tgt = tgt;
1746         prm->rq_result = scsi_status;
1747         prm->sense_buffer = &cmd->sense_buffer[0];
1748         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1749         prm->sg = NULL;
1750         prm->seg_cnt = -1;
1751         prm->req_cnt = 1;
1752         prm->add_status_pkt = 0;
1753
1754         /* Send marker if required */
1755         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1756                 return -EFAULT;
1757
1758         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1759                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1760                         return -EAGAIN;
1761         }
1762
1763         *full_req_cnt = prm->req_cnt;
1764
1765         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1766                 prm->residual = se_cmd->residual_count;
1767                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1768                     "Residual underflow: %d (tag %d, "
1769                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1770                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1771                     cmd->bufflen, prm->rq_result);
1772                 prm->rq_result |= SS_RESIDUAL_UNDER;
1773         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1774                 prm->residual = se_cmd->residual_count;
1775                 ql_dbg(ql_dbg_io, vha, 0x305d,
1776                     "Residual overflow: %d (tag %d, "
1777                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1778                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1779                     cmd->bufflen, prm->rq_result);
1780                 prm->rq_result |= SS_RESIDUAL_OVER;
1781         }
1782
1783         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1784                 /*
1785                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1786                  * ignored in *xmit_response() below
1787                  */
1788                 if (qlt_has_data(cmd)) {
1789                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1790                             (IS_FWI2_CAPABLE(ha) &&
1791                             (prm->rq_result != 0))) {
1792                                 prm->add_status_pkt = 1;
1793                                 (*full_req_cnt)++;
1794                         }
1795                 }
1796         }
1797
1798         return 0;
1799 }
1800
1801 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1802         struct qla_tgt_cmd *cmd, int sending_sense)
1803 {
1804         if (ha->tgt.enable_class_2)
1805                 return 0;
1806
1807         if (sending_sense)
1808                 return cmd->conf_compl_supported;
1809         else
1810                 return ha->tgt.enable_explicit_conf &&
1811                     cmd->conf_compl_supported;
1812 }
1813
1814 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1815 /*
1816  *  Original taken from the XFS code
1817  */
1818 static unsigned long qlt_srr_random(void)
1819 {
1820         static int Inited;
1821         static unsigned long RandomValue;
1822         static DEFINE_SPINLOCK(lock);
1823         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1824         register long rv;
1825         register long lo;
1826         register long hi;
1827         unsigned long flags;
1828
1829         spin_lock_irqsave(&lock, flags);
1830         if (!Inited) {
1831                 RandomValue = jiffies;
1832                 Inited = 1;
1833         }
1834         rv = RandomValue;
1835         hi = rv / 127773;
1836         lo = rv % 127773;
1837         rv = 16807 * lo - 2836 * hi;
1838         if (rv <= 0)
1839                 rv += 2147483647;
1840         RandomValue = rv;
1841         spin_unlock_irqrestore(&lock, flags);
1842         return rv;
1843 }
1844
1845 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1846 {
1847 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1848         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1849             == 50) {
1850                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1851                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1852                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1853         }
1854 #endif
1855         /*
1856          * It's currently not possible to simulate SRRs for FCP_WRITE without
1857          * a physical link layer failure, so don't even try here..
1858          */
1859         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1860                 return;
1861
1862         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1863             ((qlt_srr_random() % 100) == 20)) {
1864                 int i, leave = 0;
1865                 unsigned int tot_len = 0;
1866
1867                 while (leave == 0)
1868                         leave = qlt_srr_random() % cmd->sg_cnt;
1869
1870                 for (i = 0; i < leave; i++)
1871                         tot_len += cmd->sg[i].length;
1872
1873                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1874                     "Cutting cmd %p (tag %d) buffer"
1875                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1876                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1877                     cmd->bufflen, cmd->sg_cnt);
1878
1879                 cmd->bufflen = tot_len;
1880                 cmd->sg_cnt = leave;
1881         }
1882
1883         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1884                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1885
1886                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1887                     "Cutting cmd %p (tag %d) buffer head "
1888                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1889                     cmd->bufflen);
1890                 if (offset == 0)
1891                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1892                 else if (qlt_set_data_offset(cmd, offset)) {
1893                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1894                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1895                 }
1896         }
1897 }
1898 #else
1899 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1900 {}
1901 #endif
1902
1903 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1904         struct qla_tgt_prm *prm)
1905 {
1906         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1907             (uint32_t)sizeof(ctio->u.status1.sense_data));
1908         ctio->u.status0.flags |=
1909             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1910         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1911                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1912                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1913                     CTIO7_FLAGS_CONFORM_REQ);
1914         }
1915         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1916         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1917         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1918                 int i;
1919
1920                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1921                         if (prm->cmd->se_cmd.scsi_status != 0) {
1922                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1923                                     "Skipping EXPLICIT_CONFORM and "
1924                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1925                                     "non GOOD status\n");
1926                                 goto skip_explict_conf;
1927                         }
1928                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1929                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1930                             CTIO7_FLAGS_CONFORM_REQ);
1931                 }
1932 skip_explict_conf:
1933                 ctio->u.status1.flags &=
1934                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1935                 ctio->u.status1.flags |=
1936                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1937                 ctio->u.status1.scsi_status |=
1938                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1939                 ctio->u.status1.sense_length =
1940                     cpu_to_le16(prm->sense_buffer_len);
1941                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1942                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1943                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1944 #if 0
1945                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1946                         static int q;
1947                         if (q < 10) {
1948                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1949                                     "qla_target(%d): %d bytes of sense "
1950                                     "lost", prm->tgt->ha->vp_idx,
1951                                     prm->sense_buffer_len % 4);
1952                                 q++;
1953                         }
1954                 }
1955 #endif
1956         } else {
1957                 ctio->u.status1.flags &=
1958                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1959                 ctio->u.status1.flags |=
1960                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1961                 ctio->u.status1.sense_length = 0;
1962                 memset(ctio->u.status1.sense_data, 0,
1963                     sizeof(ctio->u.status1.sense_data));
1964         }
1965
1966         /* Sense with len > 24, is it possible ??? */
1967 }
1968
1969
1970
1971 /* diff  */
1972 static inline int
1973 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1974 {
1975         /*
1976          * Uncomment when corresponding SCSI changes are done.
1977          *
1978          if (!sp->cmd->prot_chk)
1979          return 0;
1980          *
1981          */
1982         switch (se_cmd->prot_op) {
1983         case TARGET_PROT_DOUT_INSERT:
1984         case TARGET_PROT_DIN_STRIP:
1985                 if (ql2xenablehba_err_chk >= 1)
1986                         return 1;
1987                 break;
1988         case TARGET_PROT_DOUT_PASS:
1989         case TARGET_PROT_DIN_PASS:
1990                 if (ql2xenablehba_err_chk >= 2)
1991                         return 1;
1992                 break;
1993         case TARGET_PROT_DIN_INSERT:
1994         case TARGET_PROT_DOUT_STRIP:
1995                 return 1;
1996         default:
1997                 break;
1998         }
1999         return 0;
2000 }
2001
2002 /*
2003  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2004  *
2005  */
2006 static inline void
2007 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2008 {
2009         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2010
2011         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2012          * have been immplemented by TCM, before AppTag is avail.
2013          * Look for modesense_handlers[]
2014          */
2015         ctx->app_tag = 0;
2016         ctx->app_tag_mask[0] = 0x0;
2017         ctx->app_tag_mask[1] = 0x0;
2018
2019         switch (se_cmd->prot_type) {
2020         case TARGET_DIF_TYPE0_PROT:
2021                 /*
2022                  * No check for ql2xenablehba_err_chk, as it would be an
2023                  * I/O error if hba tag generation is not done.
2024                  */
2025                 ctx->ref_tag = cpu_to_le32(lba);
2026
2027                 if (!qlt_hba_err_chk_enabled(se_cmd))
2028                         break;
2029
2030                 /* enable ALL bytes of the ref tag */
2031                 ctx->ref_tag_mask[0] = 0xff;
2032                 ctx->ref_tag_mask[1] = 0xff;
2033                 ctx->ref_tag_mask[2] = 0xff;
2034                 ctx->ref_tag_mask[3] = 0xff;
2035                 break;
2036         /*
2037          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2038          * 16 bit app tag.
2039          */
2040         case TARGET_DIF_TYPE1_PROT:
2041                 ctx->ref_tag = cpu_to_le32(lba);
2042
2043                 if (!qlt_hba_err_chk_enabled(se_cmd))
2044                         break;
2045
2046                 /* enable ALL bytes of the ref tag */
2047                 ctx->ref_tag_mask[0] = 0xff;
2048                 ctx->ref_tag_mask[1] = 0xff;
2049                 ctx->ref_tag_mask[2] = 0xff;
2050                 ctx->ref_tag_mask[3] = 0xff;
2051                 break;
2052         /*
2053          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2054          * match LBA in CDB + N
2055          */
2056         case TARGET_DIF_TYPE2_PROT:
2057                 ctx->ref_tag = cpu_to_le32(lba);
2058
2059                 if (!qlt_hba_err_chk_enabled(se_cmd))
2060                         break;
2061
2062                 /* enable ALL bytes of the ref tag */
2063                 ctx->ref_tag_mask[0] = 0xff;
2064                 ctx->ref_tag_mask[1] = 0xff;
2065                 ctx->ref_tag_mask[2] = 0xff;
2066                 ctx->ref_tag_mask[3] = 0xff;
2067                 break;
2068
2069         /* For Type 3 protection: 16 bit GUARD only */
2070         case TARGET_DIF_TYPE3_PROT:
2071                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2072                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2073                 break;
2074         }
2075 }
2076
2077
2078 static inline int
2079 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2080 {
2081         uint32_t                *cur_dsd;
2082         int                     sgc;
2083         uint32_t                transfer_length = 0;
2084         uint32_t                data_bytes;
2085         uint32_t                dif_bytes;
2086         uint8_t                 bundling = 1;
2087         uint8_t                 *clr_ptr;
2088         struct crc_context      *crc_ctx_pkt = NULL;
2089         struct qla_hw_data      *ha;
2090         struct ctio_crc2_to_fw  *pkt;
2091         dma_addr_t              crc_ctx_dma;
2092         uint16_t                fw_prot_opts = 0;
2093         struct qla_tgt_cmd      *cmd = prm->cmd;
2094         struct se_cmd           *se_cmd = &cmd->se_cmd;
2095         uint32_t h;
2096         struct atio_from_isp *atio = &prm->cmd->atio;
2097         uint16_t t16;
2098
2099         sgc = 0;
2100         ha = vha->hw;
2101
2102         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2103         prm->pkt = pkt;
2104         memset(pkt, 0, sizeof(*pkt));
2105
2106         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2107                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2108                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2109                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2110
2111         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2112             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2113                 bundling = 0;
2114
2115         /* Compute dif len and adjust data len to incude protection */
2116         data_bytes = cmd->bufflen;
2117         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2118
2119         switch (se_cmd->prot_op) {
2120         case TARGET_PROT_DIN_INSERT:
2121         case TARGET_PROT_DOUT_STRIP:
2122                 transfer_length = data_bytes;
2123                 data_bytes += dif_bytes;
2124                 break;
2125
2126         case TARGET_PROT_DIN_STRIP:
2127         case TARGET_PROT_DOUT_INSERT:
2128         case TARGET_PROT_DIN_PASS:
2129         case TARGET_PROT_DOUT_PASS:
2130                 transfer_length = data_bytes + dif_bytes;
2131                 break;
2132
2133         default:
2134                 BUG();
2135                 break;
2136         }
2137
2138         if (!qlt_hba_err_chk_enabled(se_cmd))
2139                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2140         /* HBA error checking enabled */
2141         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2142                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2143                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2144                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2145                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2146                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2147         }
2148
2149         switch (se_cmd->prot_op) {
2150         case TARGET_PROT_DIN_INSERT:
2151         case TARGET_PROT_DOUT_INSERT:
2152                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2153                 break;
2154         case TARGET_PROT_DIN_STRIP:
2155         case TARGET_PROT_DOUT_STRIP:
2156                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2157                 break;
2158         case TARGET_PROT_DIN_PASS:
2159         case TARGET_PROT_DOUT_PASS:
2160                 fw_prot_opts |= PO_MODE_DIF_PASS;
2161                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2162                 break;
2163         default:/* Normal Request */
2164                 fw_prot_opts |= PO_MODE_DIF_PASS;
2165                 break;
2166         }
2167
2168
2169         /* ---- PKT ---- */
2170         /* Update entry type to indicate Command Type CRC_2 IOCB */
2171         pkt->entry_type  = CTIO_CRC2;
2172         pkt->entry_count = 1;
2173         pkt->vp_index = vha->vp_idx;
2174
2175         h = qlt_make_handle(vha);
2176         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2177                 /*
2178                  * CTIO type 7 from the firmware doesn't provide a way to
2179                  * know the initiator's LOOP ID, hence we can't find
2180                  * the session and, so, the command.
2181                  */
2182                 return -EAGAIN;
2183         } else
2184                 ha->tgt.cmds[h-1] = prm->cmd;
2185
2186
2187         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2188         pkt->nport_handle = prm->cmd->loop_id;
2189         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2190         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2191         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2192         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2193         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2194
2195         /* silence compile warning */
2196         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2197         pkt->ox_id  = cpu_to_le16(t16);
2198
2199         t16 = (atio->u.isp24.attr << 9);
2200         pkt->flags |= cpu_to_le16(t16);
2201         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2202
2203         /* Set transfer direction */
2204         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2205                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2206         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2207                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2208
2209
2210         pkt->dseg_count = prm->tot_dsds;
2211         /* Fibre channel byte count */
2212         pkt->transfer_length = cpu_to_le32(transfer_length);
2213
2214
2215         /* ----- CRC context -------- */
2216
2217         /* Allocate CRC context from global pool */
2218         crc_ctx_pkt = cmd->ctx =
2219             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2220
2221         if (!crc_ctx_pkt)
2222                 goto crc_queuing_error;
2223
2224         /* Zero out CTX area. */
2225         clr_ptr = (uint8_t *)crc_ctx_pkt;
2226         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2227
2228         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2229         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2230
2231         /* Set handle */
2232         crc_ctx_pkt->handle = pkt->handle;
2233
2234         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2235
2236         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2237         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2238         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2239
2240
2241         if (!bundling) {
2242                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2243         } else {
2244                 /*
2245                  * Configure Bundling if we need to fetch interlaving
2246                  * protection PCI accesses
2247                  */
2248                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2249                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2250                 crc_ctx_pkt->u.bundling.dseg_count =
2251                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2252                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2253         }
2254
2255         /* Finish the common fields of CRC pkt */
2256         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2257         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2258         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2259         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2260
2261
2262         /* Walks data segments */
2263         pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2264
2265         if (!bundling && prm->prot_seg_cnt) {
2266                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2267                         prm->tot_dsds, cmd))
2268                         goto crc_queuing_error;
2269         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2270                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2271                 goto crc_queuing_error;
2272
2273         if (bundling && prm->prot_seg_cnt) {
2274                 /* Walks dif segments */
2275                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2276
2277                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2278                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2279                         prm->prot_seg_cnt, cmd))
2280                         goto crc_queuing_error;
2281         }
2282         return QLA_SUCCESS;
2283
2284 crc_queuing_error:
2285         /* Cleanup will be performed by the caller */
2286
2287         return QLA_FUNCTION_FAILED;
2288 }
2289
2290
2291 /*
2292  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2293  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2294  */
2295 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2296         uint8_t scsi_status)
2297 {
2298         struct scsi_qla_host *vha = cmd->vha;
2299         struct qla_hw_data *ha = vha->hw;
2300         struct ctio7_to_24xx *pkt;
2301         struct qla_tgt_prm prm;
2302         uint32_t full_req_cnt = 0;
2303         unsigned long flags = 0;
2304         int res;
2305
2306         memset(&prm, 0, sizeof(prm));
2307         qlt_check_srr_debug(cmd, &xmit_type);
2308
2309         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2310             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2311             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2312             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2313             &cmd->se_cmd);
2314
2315         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2316             &full_req_cnt);
2317         if (unlikely(res != 0)) {
2318                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2319                         return 0;
2320
2321                 return res;
2322         }
2323
2324         spin_lock_irqsave(&ha->hardware_lock, flags);
2325
2326         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2327                 /*
2328                  * Either a chip reset is active or this request was from
2329                  * previous life, just abort the processing.
2330                  */
2331                 cmd->state = QLA_TGT_STATE_PROCESSED;
2332                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2333                 ql_dbg(ql_dbg_async, vha, 0xe101,
2334                         "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2335                         qla2x00_reset_active(vha), cmd->reset_count,
2336                         ha->chip_reset);
2337                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2338                 return 0;
2339         }
2340
2341         /* Does F/W have an IOCBs for this request */
2342         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2343         if (unlikely(res))
2344                 goto out_unmap_unlock;
2345
2346         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2347                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2348         else
2349                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2350         if (unlikely(res != 0))
2351                 goto out_unmap_unlock;
2352
2353
2354         pkt = (struct ctio7_to_24xx *)prm.pkt;
2355
2356         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2357                 pkt->u.status0.flags |=
2358                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2359                         CTIO7_FLAGS_STATUS_MODE_0);
2360
2361                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2362                         qlt_load_data_segments(&prm, vha);
2363
2364                 if (prm.add_status_pkt == 0) {
2365                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2366                                 pkt->u.status0.scsi_status =
2367                                     cpu_to_le16(prm.rq_result);
2368                                 pkt->u.status0.residual =
2369                                     cpu_to_le32(prm.residual);
2370                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2371                                     CTIO7_FLAGS_SEND_STATUS);
2372                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2373                                         pkt->u.status0.flags |=
2374                                             __constant_cpu_to_le16(
2375                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2376                                                 CTIO7_FLAGS_CONFORM_REQ);
2377                                 }
2378                         }
2379
2380                 } else {
2381                         /*
2382                          * We have already made sure that there is sufficient
2383                          * amount of request entries to not drop HW lock in
2384                          * req_pkt().
2385                          */
2386                         struct ctio7_to_24xx *ctio =
2387                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2388
2389                         ql_dbg(ql_dbg_io, vha, 0x305e,
2390                             "Building additional status packet 0x%p.\n",
2391                             ctio);
2392
2393                         /*
2394                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2395                          * ctio7_to_24xx
2396                          */
2397                         memcpy(ctio, pkt, sizeof(*ctio));
2398                         /* reset back to CTIO7 */
2399                         ctio->entry_count = 1;
2400                         ctio->entry_type = CTIO_TYPE7;
2401                         ctio->dseg_count = 0;
2402                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2403                             CTIO7_FLAGS_DATA_IN);
2404
2405                         /* Real finish is ctio_m1's finish */
2406                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2407                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2408                             CTIO7_FLAGS_DONT_RET_CTIO);
2409
2410                         /* qlt_24xx_init_ctio_to_isp will correct
2411                          * all neccessary fields that's part of CTIO7.
2412                          * There should be no residual of CTIO-CRC2 data.
2413                          */
2414                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2415                             &prm);
2416                         pr_debug("Status CTIO7: %p\n", ctio);
2417                 }
2418         } else
2419                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2420
2421
2422         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2423         cmd->cmd_sent_to_fw = 1;
2424
2425         /* Memory Barrier */
2426         wmb();
2427         qla2x00_start_iocbs(vha, vha->req);
2428         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2429
2430         return 0;
2431
2432 out_unmap_unlock:
2433         qlt_unmap_sg(vha, cmd);
2434         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2435
2436         return res;
2437 }
2438 EXPORT_SYMBOL(qlt_xmit_response);
2439
2440 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2441 {
2442         struct ctio7_to_24xx *pkt;
2443         struct scsi_qla_host *vha = cmd->vha;
2444         struct qla_hw_data *ha = vha->hw;
2445         struct qla_tgt *tgt = cmd->tgt;
2446         struct qla_tgt_prm prm;
2447         unsigned long flags;
2448         int res = 0;
2449
2450         memset(&prm, 0, sizeof(prm));
2451         prm.cmd = cmd;
2452         prm.tgt = tgt;
2453         prm.sg = NULL;
2454         prm.req_cnt = 1;
2455
2456         /* Send marker if required */
2457         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2458                 return -EIO;
2459
2460         /* Calculate number of entries and segments required */
2461         if (qlt_pci_map_calc_cnt(&prm) != 0)
2462                 return -EAGAIN;
2463
2464         spin_lock_irqsave(&ha->hardware_lock, flags);
2465
2466         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2467                 /*
2468                  * Either a chip reset is active or this request was from
2469                  * previous life, just abort the processing.
2470                  */
2471                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2472                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2473                 ql_dbg(ql_dbg_async, vha, 0xe102,
2474                         "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2475                         qla2x00_reset_active(vha), cmd->reset_count,
2476                         ha->chip_reset);
2477                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2478                 return 0;
2479         }
2480
2481         /* Does F/W have an IOCBs for this request */
2482         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2483         if (res != 0)
2484                 goto out_unlock_free_unmap;
2485         if (cmd->se_cmd.prot_op)
2486                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2487         else
2488                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2489
2490         if (unlikely(res != 0))
2491                 goto out_unlock_free_unmap;
2492         pkt = (struct ctio7_to_24xx *)prm.pkt;
2493         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2494             CTIO7_FLAGS_STATUS_MODE_0);
2495
2496         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2497                 qlt_load_data_segments(&prm, vha);
2498
2499         cmd->state = QLA_TGT_STATE_NEED_DATA;
2500         cmd->cmd_sent_to_fw = 1;
2501
2502         /* Memory Barrier */
2503         wmb();
2504         qla2x00_start_iocbs(vha, vha->req);
2505         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2506
2507         return res;
2508
2509 out_unlock_free_unmap:
2510         qlt_unmap_sg(vha, cmd);
2511         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2512
2513         return res;
2514 }
2515 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2516
2517
2518 /*
2519  * Checks the guard or meta-data for the type of error
2520  * detected by the HBA.
2521  */
2522 static inline int
2523 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2524                 struct ctio_crc_from_fw *sts)
2525 {
2526         uint8_t         *ap = &sts->actual_dif[0];
2527         uint8_t         *ep = &sts->expected_dif[0];
2528         uint32_t        e_ref_tag, a_ref_tag;
2529         uint16_t        e_app_tag, a_app_tag;
2530         uint16_t        e_guard, a_guard;
2531         uint64_t        lba = cmd->se_cmd.t_task_lba;
2532
2533         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2534         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2535         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2536
2537         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2538         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2539         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2540
2541         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2542             "iocb(s) %p Returned STATUS.\n", sts);
2543
2544         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2545             "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",
2546             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2547             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2548
2549         /*
2550          * Ignore sector if:
2551          * For type     3: ref & app tag is all 'f's
2552          * For type 0,1,2: app tag is all 'f's
2553          */
2554         if ((a_app_tag == 0xffff) &&
2555             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2556              (a_ref_tag == 0xffffffff))) {
2557                 uint32_t blocks_done;
2558
2559                 /* 2TB boundary case covered automatically with this */
2560                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2561                 cmd->se_cmd.bad_sector = e_ref_tag;
2562                 cmd->se_cmd.pi_err = 0;
2563                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2564                         "need to return scsi good\n");
2565
2566                 /* Update protection tag */
2567                 if (cmd->prot_sg_cnt) {
2568                         uint32_t i, j = 0, k = 0, num_ent;
2569                         struct scatterlist *sg, *sgl;
2570
2571
2572                         sgl = cmd->prot_sg;
2573
2574                         /* Patch the corresponding protection tags */
2575                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2576                                 num_ent = sg_dma_len(sg) / 8;
2577                                 if (k + num_ent < blocks_done) {
2578                                         k += num_ent;
2579                                         continue;
2580                                 }
2581                                 j = blocks_done - k - 1;
2582                                 k = blocks_done;
2583                                 break;
2584                         }
2585
2586                         if (k != blocks_done) {
2587                                 ql_log(ql_log_warn, vha, 0xf076,
2588                                     "unexpected tag values tag:lba=%u:%llu)\n",
2589                                     e_ref_tag, (unsigned long long)lba);
2590                                 goto out;
2591                         }
2592
2593 #if 0
2594                         struct sd_dif_tuple *spt;
2595                         /* TODO:
2596                          * This section came from initiator. Is it valid here?
2597                          * should ulp be override with actual val???
2598                          */
2599                         spt = page_address(sg_page(sg)) + sg->offset;
2600                         spt += j;
2601
2602                         spt->app_tag = 0xffff;
2603                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2604                                 spt->ref_tag = 0xffffffff;
2605 #endif
2606                 }
2607
2608                 return 0;
2609         }
2610
2611         /* check guard */
2612         if (e_guard != a_guard) {
2613                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2614                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2615
2616                 ql_log(ql_log_warn, vha, 0xe076,
2617                     "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",
2618                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2619                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2620                     a_guard, e_guard, cmd);
2621                 goto out;
2622         }
2623
2624         /* check ref tag */
2625         if (e_ref_tag != a_ref_tag) {
2626                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2627                 cmd->se_cmd.bad_sector = e_ref_tag;
2628
2629                 ql_log(ql_log_warn, vha, 0xe077,
2630                         "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",
2631                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2632                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2633                         a_guard, e_guard, cmd);
2634                 goto out;
2635         }
2636
2637         /* check appl tag */
2638         if (e_app_tag != a_app_tag) {
2639                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2640                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2641
2642                 ql_log(ql_log_warn, vha, 0xe078,
2643                         "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",
2644                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2645                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2646                         a_guard, e_guard, cmd);
2647                 goto out;
2648         }
2649 out:
2650         return 1;
2651 }
2652
2653
2654 /* If hardware_lock held on entry, might drop it, then reaquire */
2655 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2656 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2657         struct qla_tgt_cmd *cmd,
2658         struct atio_from_isp *atio)
2659 {
2660         struct ctio7_to_24xx *ctio24;
2661         struct qla_hw_data *ha = vha->hw;
2662         request_t *pkt;
2663         int ret = 0;
2664         uint16_t temp;
2665
2666         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2667
2668         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2669         if (pkt == NULL) {
2670                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2671                     "qla_target(%d): %s failed: unable to allocate "
2672                     "request packet\n", vha->vp_idx, __func__);
2673                 return -ENOMEM;
2674         }
2675
2676         if (cmd != NULL) {
2677                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2678                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2679                             "qla_target(%d): Terminating cmd %p with "
2680                             "incorrect state %d\n", vha->vp_idx, cmd,
2681                             cmd->state);
2682                 } else
2683                         ret = 1;
2684         }
2685
2686         pkt->entry_count = 1;
2687         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2688
2689         ctio24 = (struct ctio7_to_24xx *)pkt;
2690         ctio24->entry_type = CTIO_TYPE7;
2691         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2692         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2693         ctio24->vp_index = vha->vp_idx;
2694         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2695         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2696         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2697         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2698         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2699             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2700                 CTIO7_FLAGS_TERMINATE);
2701         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2702         ctio24->u.status1.ox_id = cpu_to_le16(temp);
2703
2704         /* Most likely, it isn't needed */
2705         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2706             &atio->u.isp24.fcp_cmnd.add_cdb[
2707             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2708         if (ctio24->u.status1.residual != 0)
2709                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2710
2711         /* Memory Barrier */
2712         wmb();
2713         qla2x00_start_iocbs(vha, vha->req);
2714         return ret;
2715 }
2716
2717 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2718         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2719 {
2720         unsigned long flags;
2721         int rc;
2722
2723         if (qlt_issue_marker(vha, ha_locked) < 0)
2724                 return;
2725
2726         if (ha_locked) {
2727                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2728                 if (rc == -ENOMEM)
2729                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2730                 goto done;
2731         }
2732         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2733         rc = __qlt_send_term_exchange(vha, cmd, atio);
2734         if (rc == -ENOMEM)
2735                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2736         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2737
2738 done:
2739         if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
2740             !cmd->cmd_sent_to_fw)) {
2741                 if (!ha_locked && !in_interrupt())
2742                         msleep(250); /* just in case */
2743
2744                 qlt_unmap_sg(vha, cmd);
2745                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2746         }
2747         return;
2748 }
2749
2750 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
2751 {
2752         struct list_head free_list;
2753         struct qla_tgt_cmd *cmd, *tcmd;
2754
2755         vha->hw->tgt.leak_exchg_thresh_hold =
2756             (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
2757
2758         cmd = tcmd = NULL;
2759         if (!list_empty(&vha->hw->tgt.q_full_list)) {
2760                 INIT_LIST_HEAD(&free_list);
2761                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
2762
2763                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
2764                         list_del(&cmd->cmd_list);
2765                         /* This cmd was never sent to TCM.  There is no need
2766                          * to schedule free or call free_cmd
2767                          */
2768                         qlt_free_cmd(cmd);
2769                         vha->hw->tgt.num_qfull_cmds_alloc--;
2770                 }
2771         }
2772         vha->hw->tgt.num_qfull_cmds_dropped = 0;
2773 }
2774
2775 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
2776 {
2777         uint32_t total_leaked;
2778
2779         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
2780
2781         if (vha->hw->tgt.leak_exchg_thresh_hold &&
2782             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
2783
2784                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
2785                     "Chip reset due to exchange starvation: %d/%d.\n",
2786                     total_leaked, vha->hw->fw_xcb_count);
2787
2788                 if (IS_P3P_TYPE(vha->hw))
2789                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
2790                 else
2791                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
2792                 qla2xxx_wake_dpc(vha);
2793         }
2794
2795 }
2796
2797 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2798 {
2799         struct qla_tgt_sess *sess = cmd->sess;
2800
2801         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2802             "%s: se_cmd[%p] ox_id %04x\n",
2803             __func__, &cmd->se_cmd,
2804             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2805
2806         BUG_ON(cmd->cmd_in_wq);
2807
2808         if (!cmd->q_full)
2809                 qlt_decr_num_pend_cmds(cmd->vha);
2810
2811         BUG_ON(cmd->sg_mapped);
2812         cmd->jiffies_at_free = get_jiffies_64();
2813         if (unlikely(cmd->free_sg))
2814                 kfree(cmd->sg);
2815
2816         if (!sess || !sess->se_sess) {
2817                 WARN_ON(1);
2818                 return;
2819         }
2820         cmd->jiffies_at_free = get_jiffies_64();
2821         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2822 }
2823 EXPORT_SYMBOL(qlt_free_cmd);
2824
2825 /* ha->hardware_lock supposed to be held on entry */
2826 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2827         struct qla_tgt_cmd *cmd, void *ctio)
2828 {
2829         struct qla_tgt_srr_ctio *sc;
2830         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2831         struct qla_tgt_srr_imm *imm;
2832
2833         tgt->ctio_srr_id++;
2834         cmd->cmd_flags |= BIT_15;
2835
2836         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2837             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2838
2839         if (!ctio) {
2840                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2841                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2842                     vha->vp_idx);
2843                 return -EINVAL;
2844         }
2845
2846         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2847         if (sc != NULL) {
2848                 sc->cmd = cmd;
2849                 /* IRQ is already OFF */
2850                 spin_lock(&tgt->srr_lock);
2851                 sc->srr_id = tgt->ctio_srr_id;
2852                 list_add_tail(&sc->srr_list_entry,
2853                     &tgt->srr_ctio_list);
2854                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2855                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2856                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2857                         int found = 0;
2858                         list_for_each_entry(imm, &tgt->srr_imm_list,
2859                             srr_list_entry) {
2860                                 if (imm->srr_id == sc->srr_id) {
2861                                         found = 1;
2862                                         break;
2863                                 }
2864                         }
2865                         if (found) {
2866                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2867                                     "Scheduling srr work\n");
2868                                 schedule_work(&tgt->srr_work);
2869                         } else {
2870                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2871                                     "qla_target(%d): imm_srr_id "
2872                                     "== ctio_srr_id (%d), but there is no "
2873                                     "corresponding SRR IMM, deleting CTIO "
2874                                     "SRR %p\n", vha->vp_idx,
2875                                     tgt->ctio_srr_id, sc);
2876                                 list_del(&sc->srr_list_entry);
2877                                 spin_unlock(&tgt->srr_lock);
2878
2879                                 kfree(sc);
2880                                 return -EINVAL;
2881                         }
2882                 }
2883                 spin_unlock(&tgt->srr_lock);
2884         } else {
2885                 struct qla_tgt_srr_imm *ti;
2886
2887                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2888                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2889                     vha->vp_idx);
2890                 spin_lock(&tgt->srr_lock);
2891                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2892                     srr_list_entry) {
2893                         if (imm->srr_id == tgt->ctio_srr_id) {
2894                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2895                                     "IMM SRR %p deleted (id %d)\n",
2896                                     imm, imm->srr_id);
2897                                 list_del(&imm->srr_list_entry);
2898                                 qlt_reject_free_srr_imm(vha, imm, 1);
2899                         }
2900                 }
2901                 spin_unlock(&tgt->srr_lock);
2902
2903                 return -ENOMEM;
2904         }
2905
2906         return 0;
2907 }
2908
2909 /*
2910  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2911  */
2912 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2913         struct qla_tgt_cmd *cmd, uint32_t status)
2914 {
2915         int term = 0;
2916
2917         if (ctio != NULL) {
2918                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2919                 term = !(c->flags &
2920                     __constant_cpu_to_le16(OF_TERM_EXCH));
2921         } else
2922                 term = 1;
2923
2924         if (term)
2925                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2926
2927         return term;
2928 }
2929
2930 /* ha->hardware_lock supposed to be held on entry */
2931 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2932         uint32_t handle)
2933 {
2934         struct qla_hw_data *ha = vha->hw;
2935
2936         handle--;
2937         if (ha->tgt.cmds[handle] != NULL) {
2938                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2939                 ha->tgt.cmds[handle] = NULL;
2940                 return cmd;
2941         } else
2942                 return NULL;
2943 }
2944
2945 /* ha->hardware_lock supposed to be held on entry */
2946 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2947         uint32_t handle, void *ctio)
2948 {
2949         struct qla_tgt_cmd *cmd = NULL;
2950
2951         /* Clear out internal marks */
2952         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2953             CTIO_INTERMEDIATE_HANDLE_MARK);
2954
2955         if (handle != QLA_TGT_NULL_HANDLE) {
2956                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
2957                         return NULL;
2958
2959                 /* handle-1 is actually used */
2960                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2961                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2962                             "qla_target(%d): Wrong handle %x received\n",
2963                             vha->vp_idx, handle);
2964                         return NULL;
2965                 }
2966                 cmd = qlt_get_cmd(vha, handle);
2967                 if (unlikely(cmd == NULL)) {
2968                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2969                             "qla_target(%d): Suspicious: unable to "
2970                             "find the command with handle %x\n", vha->vp_idx,
2971                             handle);
2972                         return NULL;
2973                 }
2974         } else if (ctio != NULL) {
2975                 /* We can't get loop ID from CTIO7 */
2976                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2977                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2978                     "support NULL handles\n", vha->vp_idx);
2979                 return NULL;
2980         }
2981
2982         return cmd;
2983 }
2984
2985 /* hardware_lock should be held by caller. */
2986 static void
2987 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2988 {
2989         struct qla_hw_data *ha = vha->hw;
2990         uint32_t handle;
2991
2992         if (cmd->sg_mapped)
2993                 qlt_unmap_sg(vha, cmd);
2994
2995         handle = qlt_make_handle(vha);
2996
2997         /* TODO: fix debug message type and ids. */
2998         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2999                 ql_dbg(ql_dbg_io, vha, 0xff00,
3000                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3001         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3002                 cmd->write_data_transferred = 0;
3003                 cmd->state = QLA_TGT_STATE_DATA_IN;
3004
3005                 ql_dbg(ql_dbg_io, vha, 0xff01,
3006                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3007
3008                 ha->tgt.tgt_ops->handle_data(cmd);
3009                 return;
3010         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3011                 ql_dbg(ql_dbg_io, vha, 0xff02,
3012                     "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3013         } else {
3014                 ql_dbg(ql_dbg_io, vha, 0xff03,
3015                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3016                     cmd->state);
3017                 dump_stack();
3018         }
3019
3020         cmd->cmd_flags |= BIT_12;
3021         ha->tgt.tgt_ops->free_cmd(cmd);
3022 }
3023
3024 void
3025 qlt_host_reset_handler(struct qla_hw_data *ha)
3026 {
3027         struct qla_tgt_cmd *cmd;
3028         unsigned long flags;
3029         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3030         scsi_qla_host_t *vha = NULL;
3031         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3032         uint32_t i;
3033
3034         if (!base_vha->hw->tgt.tgt_ops)
3035                 return;
3036
3037         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3038                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3039                         "Target mode disabled\n");
3040                 return;
3041         }
3042
3043         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3044             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3045             base_vha->dpc_flags);
3046
3047         spin_lock_irqsave(&ha->hardware_lock, flags);
3048         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3049                 cmd = qlt_get_cmd(base_vha, i);
3050                 if (!cmd)
3051                         continue;
3052                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3053                 vha = cmd->vha;
3054                 qlt_abort_cmd_on_host_reset(vha, cmd);
3055         }
3056         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3057 }
3058
3059
3060 /*
3061  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3062  */
3063 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3064         uint32_t status, void *ctio)
3065 {
3066         struct qla_hw_data *ha = vha->hw;
3067         struct se_cmd *se_cmd;
3068         const struct target_core_fabric_ops *tfo;
3069         struct qla_tgt_cmd *cmd;
3070
3071         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3072                 /* That could happen only in case of an error/reset/abort */
3073                 if (status != CTIO_SUCCESS) {
3074                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3075                             "Intermediate CTIO received"
3076                             " (status %x)\n", status);
3077                 }
3078                 return;
3079         }
3080
3081         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3082         if (cmd == NULL)
3083                 return;
3084
3085         se_cmd = &cmd->se_cmd;
3086         tfo = se_cmd->se_tfo;
3087         cmd->cmd_sent_to_fw = 0;
3088
3089         qlt_unmap_sg(vha, cmd);
3090
3091         if (unlikely(status != CTIO_SUCCESS)) {
3092                 switch (status & 0xFFFF) {
3093                 case CTIO_LIP_RESET:
3094                 case CTIO_TARGET_RESET:
3095                 case CTIO_ABORTED:
3096                         /* driver request abort via Terminate exchange */
3097                 case CTIO_TIMEOUT:
3098                 case CTIO_INVALID_RX_ID:
3099                         /* They are OK */
3100                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3101                             "qla_target(%d): CTIO with "
3102                             "status %#x received, state %x, se_cmd %p, "
3103                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3104                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3105                             status, cmd->state, se_cmd);
3106                         break;
3107
3108                 case CTIO_PORT_LOGGED_OUT:
3109                 case CTIO_PORT_UNAVAILABLE:
3110                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3111                             "qla_target(%d): CTIO with PORT LOGGED "
3112                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
3113                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3114                             status, cmd->state, se_cmd);
3115                         break;
3116
3117                 case CTIO_SRR_RECEIVED:
3118                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3119                             "qla_target(%d): CTIO with SRR_RECEIVED"
3120                             " status %x received (state %x, se_cmd %p)\n",
3121                             vha->vp_idx, status, cmd->state, se_cmd);
3122                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3123                                 break;
3124                         else
3125                                 return;
3126
3127                 case CTIO_DIF_ERROR: {
3128                         struct ctio_crc_from_fw *crc =
3129                                 (struct ctio_crc_from_fw *)ctio;
3130                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3131                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3132                             vha->vp_idx, status, cmd->state, se_cmd,
3133                             *((u64 *)&crc->actual_dif[0]),
3134                             *((u64 *)&crc->expected_dif[0]));
3135
3136                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3137                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3138                                         /* scsi Write/xfer rdy complete */
3139                                         goto skip_term;
3140                                 } else {
3141                                         /* scsi read/xmit respond complete
3142                                          * call handle dif to send scsi status
3143                                          * rather than terminate exchange.
3144                                          */
3145                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3146                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3147                                         return;
3148                                 }
3149                         } else {
3150                                 /* Need to generate a SCSI good completion.
3151                                  * because FW did not send scsi status.
3152                                  */
3153                                 status = 0;
3154                                 goto skip_term;
3155                         }
3156                         break;
3157                 }
3158                 default:
3159                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3160                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3161                             vha->vp_idx, status, cmd->state, se_cmd);
3162                         break;
3163                 }
3164
3165
3166                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3167                  * cmd is already aborted/terminated, we don't
3168                  * need to terminate again.  The exchange is already
3169                  * cleaned up/freed at FW level.  Just cleanup at driver
3170                  * level.
3171                  */
3172                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3173                     (cmd->state != QLA_TGT_STATE_ABORTED)) {
3174                         cmd->cmd_flags |= BIT_13;
3175                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3176                                 return;
3177                 }
3178         }
3179 skip_term:
3180
3181         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3182                 ;
3183         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3184                 int rx_status = 0;
3185
3186                 cmd->state = QLA_TGT_STATE_DATA_IN;
3187
3188                 if (unlikely(status != CTIO_SUCCESS))
3189                         rx_status = -EIO;
3190                 else
3191                         cmd->write_data_transferred = 1;
3192
3193                 ha->tgt.tgt_ops->handle_data(cmd);
3194                 return;
3195         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3196                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3197                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
3198         } else {
3199                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3200                     "qla_target(%d): A command in state (%d) should "
3201                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3202         }
3203
3204         if (unlikely(status != CTIO_SUCCESS) &&
3205                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3206                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3207                 dump_stack();
3208         }
3209
3210
3211         ha->tgt.tgt_ops->free_cmd(cmd);
3212 }
3213
3214 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3215         uint8_t task_codes)
3216 {
3217         int fcp_task_attr;
3218
3219         switch (task_codes) {
3220         case ATIO_SIMPLE_QUEUE:
3221                 fcp_task_attr = TCM_SIMPLE_TAG;
3222                 break;
3223         case ATIO_HEAD_OF_QUEUE:
3224                 fcp_task_attr = TCM_HEAD_TAG;
3225                 break;
3226         case ATIO_ORDERED_QUEUE:
3227                 fcp_task_attr = TCM_ORDERED_TAG;
3228                 break;
3229         case ATIO_ACA_QUEUE:
3230                 fcp_task_attr = TCM_ACA_TAG;
3231                 break;
3232         case ATIO_UNTAGGED:
3233                 fcp_task_attr = TCM_SIMPLE_TAG;
3234                 break;
3235         default:
3236                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3237                     "qla_target: unknown task code %x, use ORDERED instead\n",
3238                     task_codes);
3239                 fcp_task_attr = TCM_ORDERED_TAG;
3240                 break;
3241         }
3242
3243         return fcp_task_attr;
3244 }
3245
3246 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3247                                         uint8_t *);
3248 /*
3249  * Process context for I/O path into tcm_qla2xxx code
3250  */
3251 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3252 {
3253         scsi_qla_host_t *vha = cmd->vha;
3254         struct qla_hw_data *ha = vha->hw;
3255         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3256         struct qla_tgt_sess *sess = cmd->sess;
3257         struct atio_from_isp *atio = &cmd->atio;
3258         unsigned char *cdb;
3259         unsigned long flags;
3260         uint32_t data_length;
3261         int ret, fcp_task_attr, data_dir, bidi = 0;
3262
3263         cmd->cmd_in_wq = 0;
3264         cmd->cmd_flags |= BIT_1;
3265         if (tgt->tgt_stop)
3266                 goto out_term;
3267
3268         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3269         cmd->tag = atio->u.isp24.exchange_addr;
3270         cmd->unpacked_lun = scsilun_to_int(
3271             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3272
3273         if (atio->u.isp24.fcp_cmnd.rddata &&
3274             atio->u.isp24.fcp_cmnd.wrdata) {
3275                 bidi = 1;
3276                 data_dir = DMA_TO_DEVICE;
3277         } else if (atio->u.isp24.fcp_cmnd.rddata)
3278                 data_dir = DMA_FROM_DEVICE;
3279         else if (atio->u.isp24.fcp_cmnd.wrdata)
3280                 data_dir = DMA_TO_DEVICE;
3281         else
3282                 data_dir = DMA_NONE;
3283
3284         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3285             atio->u.isp24.fcp_cmnd.task_attr);
3286         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3287             &atio->u.isp24.fcp_cmnd.add_cdb[
3288             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3289
3290         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3291                                           fcp_task_attr, data_dir, bidi);
3292         if (ret != 0)
3293                 goto out_term;
3294         /*
3295          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3296          */
3297         spin_lock_irqsave(&ha->hardware_lock, flags);
3298         ha->tgt.tgt_ops->put_sess(sess);
3299         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3300         return;
3301
3302 out_term:
3303         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3304         /*
3305          * cmd has not sent to target yet, so pass NULL as the second
3306          * argument to qlt_send_term_exchange() and free the memory here.
3307          */
3308         cmd->cmd_flags |= BIT_2;
3309         spin_lock_irqsave(&ha->hardware_lock, flags);
3310         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3311
3312         qlt_decr_num_pend_cmds(vha);
3313         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3314         ha->tgt.tgt_ops->put_sess(sess);
3315         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3316 }
3317
3318 static void qlt_do_work(struct work_struct *work)
3319 {
3320         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3321
3322         __qlt_do_work(cmd);
3323 }
3324
3325 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3326                                        struct qla_tgt_sess *sess,
3327                                        struct atio_from_isp *atio)
3328 {
3329         struct se_session *se_sess = sess->se_sess;
3330         struct qla_tgt_cmd *cmd;
3331         int tag;
3332
3333         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3334         if (tag < 0)
3335                 return NULL;
3336
3337         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3338         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3339
3340         memcpy(&cmd->atio, atio, sizeof(*atio));
3341         cmd->state = QLA_TGT_STATE_NEW;
3342         cmd->tgt = vha->vha_tgt.qla_tgt;
3343         qlt_incr_num_pend_cmds(vha);
3344         cmd->vha = vha;
3345         cmd->se_cmd.map_tag = tag;
3346         cmd->sess = sess;
3347         cmd->loop_id = sess->loop_id;
3348         cmd->conf_compl_supported = sess->conf_compl_supported;
3349
3350         return cmd;
3351 }
3352
3353 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3354                           uint16_t);
3355
3356 static void qlt_create_sess_from_atio(struct work_struct *work)
3357 {
3358         struct qla_tgt_sess_op *op = container_of(work,
3359                                         struct qla_tgt_sess_op, work);
3360         scsi_qla_host_t *vha = op->vha;
3361         struct qla_hw_data *ha = vha->hw;
3362         struct qla_tgt_sess *sess;
3363         struct qla_tgt_cmd *cmd;
3364         unsigned long flags;
3365         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3366
3367         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3368                 "qla_target(%d): Unable to find wwn login"
3369                 " (s_id %x:%x:%x), trying to create it manually\n",
3370                 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3371
3372         if (op->atio.u.raw.entry_count > 1) {
3373                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3374                         "Dropping multy entry atio %p\n", &op->atio);
3375                 goto out_term;
3376         }
3377
3378         mutex_lock(&vha->vha_tgt.tgt_mutex);
3379         sess = qlt_make_local_sess(vha, s_id);
3380         /* sess has an extra creation ref. */
3381         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3382
3383         if (!sess)
3384                 goto out_term;
3385         /*
3386          * Now obtain a pre-allocated session tag using the original op->atio
3387          * packet header, and dispatch into __qlt_do_work() using the existing
3388          * process context.
3389          */
3390         cmd = qlt_get_tag(vha, sess, &op->atio);
3391         if (!cmd) {
3392                 spin_lock_irqsave(&ha->hardware_lock, flags);
3393                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3394                 ha->tgt.tgt_ops->put_sess(sess);
3395                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3396                 kfree(op);
3397                 return;
3398         }
3399         /*
3400          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3401          * the extra reference taken above by qlt_make_local_sess()
3402          */
3403         __qlt_do_work(cmd);
3404         kfree(op);
3405         return;
3406
3407 out_term:
3408         spin_lock_irqsave(&ha->hardware_lock, flags);
3409         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3410         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3411         kfree(op);
3412
3413 }
3414
3415 /* ha->hardware_lock supposed to be held on entry */
3416 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3417         struct atio_from_isp *atio)
3418 {
3419         struct qla_hw_data *ha = vha->hw;
3420         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3421         struct qla_tgt_sess *sess;
3422         struct qla_tgt_cmd *cmd;
3423
3424         if (unlikely(tgt->tgt_stop)) {
3425                 ql_dbg(ql_dbg_io, vha, 0x3061,
3426                     "New command while device %p is shutting down\n", tgt);
3427                 return -EFAULT;
3428         }
3429
3430         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3431         if (unlikely(!sess)) {
3432                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3433                                                      GFP_ATOMIC);
3434                 if (!op)
3435                         return -ENOMEM;
3436
3437                 memcpy(&op->atio, atio, sizeof(*atio));
3438                 op->vha = vha;
3439                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3440                 queue_work(qla_tgt_wq, &op->work);
3441                 return 0;
3442         }
3443         /*
3444          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3445          */
3446         kref_get(&sess->se_sess->sess_kref);
3447
3448         cmd = qlt_get_tag(vha, sess, atio);
3449         if (!cmd) {
3450                 ql_dbg(ql_dbg_io, vha, 0x3062,
3451                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3452                 ha->tgt.tgt_ops->put_sess(sess);
3453                 return -ENOMEM;
3454         }
3455
3456         cmd->cmd_flags = 0;
3457         cmd->jiffies_at_alloc = get_jiffies_64();
3458
3459         cmd->reset_count = vha->hw->chip_reset;
3460
3461         cmd->cmd_in_wq = 1;
3462         cmd->cmd_flags |= BIT_0;
3463         INIT_WORK(&cmd->work, qlt_do_work);
3464         queue_work(qla_tgt_wq, &cmd->work);
3465         return 0;
3466
3467 }
3468
3469 /* ha->hardware_lock supposed to be held on entry */
3470 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3471         int fn, void *iocb, int flags)
3472 {
3473         struct scsi_qla_host *vha = sess->vha;
3474         struct qla_hw_data *ha = vha->hw;
3475         struct qla_tgt_mgmt_cmd *mcmd;
3476         int res;
3477         uint8_t tmr_func;
3478
3479         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3480         if (!mcmd) {
3481                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3482                     "qla_target(%d): Allocation of management "
3483                     "command failed, some commands and their data could "
3484                     "leak\n", vha->vp_idx);
3485                 return -ENOMEM;
3486         }
3487         memset(mcmd, 0, sizeof(*mcmd));
3488         mcmd->sess = sess;
3489
3490         if (iocb) {
3491                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3492                     sizeof(mcmd->orig_iocb.imm_ntfy));
3493         }
3494         mcmd->tmr_func = fn;
3495         mcmd->flags = flags;
3496         mcmd->reset_count = vha->hw->chip_reset;
3497
3498         switch (fn) {
3499         case QLA_TGT_CLEAR_ACA:
3500                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3501                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3502                 tmr_func = TMR_CLEAR_ACA;
3503                 break;
3504
3505         case QLA_TGT_TARGET_RESET:
3506                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3507                     "qla_target(%d): TARGET_RESET received\n",
3508                     sess->vha->vp_idx);
3509                 tmr_func = TMR_TARGET_WARM_RESET;
3510                 break;
3511
3512         case QLA_TGT_LUN_RESET:
3513                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3514                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3515                 tmr_func = TMR_LUN_RESET;
3516                 break;
3517
3518         case QLA_TGT_CLEAR_TS:
3519                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3520                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3521                 tmr_func = TMR_CLEAR_TASK_SET;
3522                 break;
3523
3524         case QLA_TGT_ABORT_TS:
3525                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3526                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3527                 tmr_func = TMR_ABORT_TASK_SET;
3528                 break;
3529 #if 0
3530         case QLA_TGT_ABORT_ALL:
3531                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3532                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3533                     sess->vha->vp_idx);
3534                 tmr_func = 0;
3535                 break;
3536
3537         case QLA_TGT_ABORT_ALL_SESS:
3538                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3539                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3540                     sess->vha->vp_idx);
3541                 tmr_func = 0;
3542                 break;
3543
3544         case QLA_TGT_NEXUS_LOSS_SESS:
3545                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3546                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3547                     sess->vha->vp_idx);
3548                 tmr_func = 0;
3549                 break;
3550
3551         case QLA_TGT_NEXUS_LOSS:
3552                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3553                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3554                 tmr_func = 0;
3555                 break;
3556 #endif
3557         default:
3558                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3559                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3560                     sess->vha->vp_idx, fn);
3561                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3562                 return -ENOSYS;
3563         }
3564
3565         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3566         if (res != 0) {
3567                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3568                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3569                     sess->vha->vp_idx, res);
3570                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3571                 return -EFAULT;
3572         }
3573
3574         return 0;
3575 }
3576
3577 /* ha->hardware_lock supposed to be held on entry */
3578 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3579 {
3580         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3581         struct qla_hw_data *ha = vha->hw;
3582         struct qla_tgt *tgt;
3583         struct qla_tgt_sess *sess;
3584         uint32_t lun, unpacked_lun;
3585         int lun_size, fn;
3586
3587         tgt = vha->vha_tgt.qla_tgt;
3588
3589         lun = a->u.isp24.fcp_cmnd.lun;
3590         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3591         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3592         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3593             a->u.isp24.fcp_hdr.s_id);
3594         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3595
3596         if (!sess) {
3597                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3598                     "qla_target(%d): task mgmt fn 0x%x for "
3599                     "non-existant session\n", vha->vp_idx, fn);
3600                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3601                     sizeof(struct atio_from_isp));
3602         }
3603
3604         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3605 }
3606
3607 /* ha->hardware_lock supposed to be held on entry */
3608 static int __qlt_abort_task(struct scsi_qla_host *vha,
3609         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3610 {
3611         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3612         struct qla_hw_data *ha = vha->hw;
3613         struct qla_tgt_mgmt_cmd *mcmd;
3614         uint32_t lun, unpacked_lun;
3615         int rc;
3616
3617         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3618         if (mcmd == NULL) {
3619                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3620                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3621                     vha->vp_idx, __func__);
3622                 return -ENOMEM;
3623         }
3624         memset(mcmd, 0, sizeof(*mcmd));
3625
3626         mcmd->sess = sess;
3627         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3628             sizeof(mcmd->orig_iocb.imm_ntfy));
3629
3630         lun = a->u.isp24.fcp_cmnd.lun;
3631         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3632         mcmd->reset_count = vha->hw->chip_reset;
3633
3634         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3635             le16_to_cpu(iocb->u.isp2x.seq_id));
3636         if (rc != 0) {
3637                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3638                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3639                     vha->vp_idx, rc);
3640                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3641                 return -EFAULT;
3642         }
3643
3644         return 0;
3645 }
3646
3647 /* ha->hardware_lock supposed to be held on entry */
3648 static int qlt_abort_task(struct scsi_qla_host *vha,
3649         struct imm_ntfy_from_isp *iocb)
3650 {
3651         struct qla_hw_data *ha = vha->hw;
3652         struct qla_tgt_sess *sess;
3653         int loop_id;
3654
3655         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3656
3657         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3658         if (sess == NULL) {
3659                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3660                     "qla_target(%d): task abort for unexisting "
3661                     "session\n", vha->vp_idx);
3662                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3663                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3664         }
3665
3666         return __qlt_abort_task(vha, iocb, sess);
3667 }
3668
3669 /*
3670  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3671  */
3672 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3673         struct imm_ntfy_from_isp *iocb)
3674 {
3675         int res = 0;
3676
3677         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3678             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3679             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3680
3681         switch (iocb->u.isp24.status_subcode) {
3682         case ELS_PLOGI:
3683         case ELS_FLOGI:
3684         case ELS_PRLI:
3685         case ELS_LOGO:
3686         case ELS_PRLO:
3687                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3688                 break;
3689         case ELS_PDISC:
3690         case ELS_ADISC:
3691         {
3692                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3693                 if (tgt->link_reinit_iocb_pending) {
3694                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3695                             0, 0, 0, 0, 0, 0);
3696                         tgt->link_reinit_iocb_pending = 0;
3697                 }
3698                 res = 1; /* send notify ack */
3699                 break;
3700         }
3701
3702         default:
3703                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3704                     "qla_target(%d): Unsupported ELS command %x "
3705                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3706                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3707                 break;
3708         }
3709
3710         return res;
3711 }
3712
3713 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3714 {
3715 #if 1
3716         /*
3717          * FIXME: Reject non zero SRR relative offset until we can test
3718          * this code properly.
3719          */
3720         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3721         return -1;
3722 #else
3723         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3724         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3725         int i, sg_srr_cnt, bufflen = 0;
3726
3727         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3728             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3729             "cmd->sg_cnt: %u, direction: %d\n",
3730             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3731
3732         if (!cmd->sg || !cmd->sg_cnt) {
3733                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3734                     "Missing cmd->sg or zero cmd->sg_cnt in"
3735                     " qla_tgt_set_data_offset\n");
3736                 return -EINVAL;
3737         }
3738         /*
3739          * Walk the current cmd->sg list until we locate the new sg_srr_start
3740          */
3741         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3742                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3743                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3744                     i, sg, sg_page(sg), sg->length, sg->offset);
3745
3746                 if ((sg->length + tmp) > offset) {
3747                         first_offset = rem_offset;
3748                         sg_srr_start = sg;
3749                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3750                             "Found matching sg[%d], using %p as sg_srr_start, "
3751                             "and using first_offset: %zu\n", i, sg,
3752                             first_offset);
3753                         break;
3754                 }
3755                 tmp += sg->length;
3756                 rem_offset -= sg->length;
3757         }
3758
3759         if (!sg_srr_start) {
3760                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3761                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3762                 return -EINVAL;
3763         }
3764         sg_srr_cnt = (cmd->sg_cnt - i);
3765
3766         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3767         if (!sg_srr) {
3768                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3769                     "Unable to allocate sgp\n");
3770                 return -ENOMEM;
3771         }
3772         sg_init_table(sg_srr, sg_srr_cnt);
3773         sgp = &sg_srr[0];
3774         /*
3775          * Walk the remaining list for sg_srr_start, mapping to the newly
3776          * allocated sg_srr taking first_offset into account.
3777          */
3778         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3779                 if (first_offset) {
3780                         sg_set_page(sgp, sg_page(sg),
3781                             (sg->length - first_offset), first_offset);
3782                         first_offset = 0;
3783                 } else {
3784                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3785                 }
3786                 bufflen += sgp->length;
3787
3788                 sgp = sg_next(sgp);
3789                 if (!sgp)
3790                         break;
3791         }
3792
3793         cmd->sg = sg_srr;
3794         cmd->sg_cnt = sg_srr_cnt;
3795         cmd->bufflen = bufflen;
3796         cmd->offset += offset;
3797         cmd->free_sg = 1;
3798
3799         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3800         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3801             cmd->sg_cnt);
3802         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3803             cmd->bufflen);
3804         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3805             cmd->offset);
3806
3807         if (cmd->sg_cnt < 0)
3808                 BUG();
3809
3810         if (cmd->bufflen < 0)
3811                 BUG();
3812
3813         return 0;
3814 #endif
3815 }
3816
3817 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3818         uint32_t srr_rel_offs, int *xmit_type)
3819 {
3820         int res = 0, rel_offs;
3821
3822         rel_offs = srr_rel_offs - cmd->offset;
3823         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3824             srr_rel_offs, rel_offs);
3825
3826         *xmit_type = QLA_TGT_XMIT_ALL;
3827
3828         if (rel_offs < 0) {
3829                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3830                     "qla_target(%d): SRR rel_offs (%d) < 0",
3831                     cmd->vha->vp_idx, rel_offs);
3832                 res = -1;
3833         } else if (rel_offs == cmd->bufflen)
3834                 *xmit_type = QLA_TGT_XMIT_STATUS;
3835         else if (rel_offs > 0)
3836                 res = qlt_set_data_offset(cmd, rel_offs);
3837
3838         return res;
3839 }
3840
3841 /* No locks, thread context */
3842 static void qlt_handle_srr(struct scsi_qla_host *vha,
3843         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3844 {
3845         struct imm_ntfy_from_isp *ntfy =
3846             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3847         struct qla_hw_data *ha = vha->hw;
3848         struct qla_tgt_cmd *cmd = sctio->cmd;
3849         struct se_cmd *se_cmd = &cmd->se_cmd;
3850         unsigned long flags;
3851         int xmit_type = 0, resp = 0;
3852         uint32_t offset;
3853         uint16_t srr_ui;
3854
3855         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3856         srr_ui = ntfy->u.isp24.srr_ui;
3857
3858         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3859             cmd, srr_ui);
3860
3861         switch (srr_ui) {
3862         case SRR_IU_STATUS:
3863                 spin_lock_irqsave(&ha->hardware_lock, flags);
3864                 qlt_send_notify_ack(vha, ntfy,
3865                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3866                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3867                 xmit_type = QLA_TGT_XMIT_STATUS;
3868                 resp = 1;
3869                 break;
3870         case SRR_IU_DATA_IN:
3871                 if (!cmd->sg || !cmd->sg_cnt) {
3872                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3873                             "Unable to process SRR_IU_DATA_IN due to"
3874                             " missing cmd->sg, state: %d\n", cmd->state);
3875                         dump_stack();
3876                         goto out_reject;
3877                 }
3878                 if (se_cmd->scsi_status != 0) {
3879                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3880                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3881                             "scsi_status\n");
3882                         goto out_reject;
3883                 }
3884                 cmd->bufflen = se_cmd->data_length;
3885
3886                 if (qlt_has_data(cmd)) {
3887                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3888                                 goto out_reject;
3889                         spin_lock_irqsave(&ha->hardware_lock, flags);
3890                         qlt_send_notify_ack(vha, ntfy,
3891                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3892                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3893                         resp = 1;
3894                 } else {
3895                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3896                             "qla_target(%d): SRR for in data for cmd "
3897                             "without them (tag %d, SCSI status %d), "
3898                             "reject", vha->vp_idx, cmd->tag,
3899                             cmd->se_cmd.scsi_status);
3900                         goto out_reject;
3901                 }
3902                 break;
3903         case SRR_IU_DATA_OUT:
3904                 if (!cmd->sg || !cmd->sg_cnt) {
3905                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3906                             "Unable to process SRR_IU_DATA_OUT due to"
3907                             " missing cmd->sg\n");
3908                         dump_stack();
3909                         goto out_reject;
3910                 }
3911                 if (se_cmd->scsi_status != 0) {
3912                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3913                             "Rejecting SRR_IU_DATA_OUT"
3914                             " with non GOOD scsi_status\n");
3915                         goto out_reject;
3916                 }
3917                 cmd->bufflen = se_cmd->data_length;
3918
3919                 if (qlt_has_data(cmd)) {
3920                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3921                                 goto out_reject;
3922                         spin_lock_irqsave(&ha->hardware_lock, flags);
3923                         qlt_send_notify_ack(vha, ntfy,
3924                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3925                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3926                         if (xmit_type & QLA_TGT_XMIT_DATA) {
3927                                 cmd->cmd_flags |= BIT_8;
3928                                 qlt_rdy_to_xfer(cmd);
3929                         }
3930                 } else {
3931                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3932                             "qla_target(%d): SRR for out data for cmd "
3933                             "without them (tag %d, SCSI status %d), "
3934                             "reject", vha->vp_idx, cmd->tag,
3935                             cmd->se_cmd.scsi_status);
3936                         goto out_reject;
3937                 }
3938                 break;
3939         default:
3940                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3941                     "qla_target(%d): Unknown srr_ui value %x",
3942                     vha->vp_idx, srr_ui);
3943                 goto out_reject;
3944         }
3945
3946         /* Transmit response in case of status and data-in cases */
3947         if (resp) {
3948                 cmd->cmd_flags |= BIT_7;
3949                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3950         }
3951
3952         return;
3953
3954 out_reject:
3955         spin_lock_irqsave(&ha->hardware_lock, flags);
3956         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3957             NOTIFY_ACK_SRR_FLAGS_REJECT,
3958             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3959             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3960         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3961                 cmd->state = QLA_TGT_STATE_DATA_IN;
3962                 dump_stack();
3963         } else {
3964                 cmd->cmd_flags |= BIT_9;
3965                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3966         }
3967         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3968 }
3969
3970 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3971         struct qla_tgt_srr_imm *imm, int ha_locked)
3972 {
3973         struct qla_hw_data *ha = vha->hw;
3974         unsigned long flags = 0;
3975
3976         if (!ha_locked)
3977                 spin_lock_irqsave(&ha->hardware_lock, flags);
3978
3979         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3980             NOTIFY_ACK_SRR_FLAGS_REJECT,
3981             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3982             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3983
3984         if (!ha_locked)
3985                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3986
3987         kfree(imm);
3988 }
3989
3990 static void qlt_handle_srr_work(struct work_struct *work)
3991 {
3992         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3993         struct scsi_qla_host *vha = tgt->vha;
3994         struct qla_tgt_srr_ctio *sctio;
3995         unsigned long flags;
3996
3997         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3998             tgt);
3999
4000 restart:
4001         spin_lock_irqsave(&tgt->srr_lock, flags);
4002         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4003                 struct qla_tgt_srr_imm *imm, *i, *ti;
4004                 struct qla_tgt_cmd *cmd;
4005                 struct se_cmd *se_cmd;
4006
4007                 imm = NULL;
4008                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4009                                                 srr_list_entry) {
4010                         if (i->srr_id == sctio->srr_id) {
4011                                 list_del(&i->srr_list_entry);
4012                                 if (imm) {
4013                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4014                                           "qla_target(%d): There must be "
4015                                           "only one IMM SRR per CTIO SRR "
4016                                           "(IMM SRR %p, id %d, CTIO %p\n",
4017                                           vha->vp_idx, i, i->srr_id, sctio);
4018                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4019                                 } else
4020                                         imm = i;
4021                         }
4022                 }
4023
4024                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4025                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4026                     sctio->srr_id);
4027
4028                 if (imm == NULL) {
4029                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4030                             "Not found matching IMM for SRR CTIO (id %d)\n",
4031                             sctio->srr_id);
4032                         continue;
4033                 } else
4034                         list_del(&sctio->srr_list_entry);
4035
4036                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4037
4038                 cmd = sctio->cmd;
4039                 /*
4040                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4041                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4042                  * logic..
4043                  */
4044                 cmd->offset = 0;
4045                 if (cmd->free_sg) {
4046                         kfree(cmd->sg);
4047                         cmd->sg = NULL;
4048                         cmd->free_sg = 0;
4049                 }
4050                 se_cmd = &cmd->se_cmd;
4051
4052                 cmd->sg_cnt = se_cmd->t_data_nents;
4053                 cmd->sg = se_cmd->t_data_sg;
4054
4055                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4056                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
4057                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
4058                     se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
4059                     cmd->sg_cnt, cmd->offset);
4060
4061                 qlt_handle_srr(vha, sctio, imm);
4062
4063                 kfree(imm);
4064                 kfree(sctio);
4065                 goto restart;
4066         }
4067         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4068 }
4069
4070 /* ha->hardware_lock supposed to be held on entry */
4071 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4072         struct imm_ntfy_from_isp *iocb)
4073 {
4074         struct qla_tgt_srr_imm *imm;
4075         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4076         struct qla_tgt_srr_ctio *sctio;
4077
4078         tgt->imm_srr_id++;
4079
4080         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4081             vha->vp_idx);
4082
4083         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4084         if (imm != NULL) {
4085                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4086
4087                 /* IRQ is already OFF */
4088                 spin_lock(&tgt->srr_lock);
4089                 imm->srr_id = tgt->imm_srr_id;
4090                 list_add_tail(&imm->srr_list_entry,
4091                     &tgt->srr_imm_list);
4092                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4093                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4094                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4095                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4096                         int found = 0;
4097                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4098                             srr_list_entry) {
4099                                 if (sctio->srr_id == imm->srr_id) {
4100                                         found = 1;
4101                                         break;
4102                                 }
4103                         }
4104                         if (found) {
4105                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4106                                     "Scheduling srr work\n");
4107                                 schedule_work(&tgt->srr_work);
4108                         } else {
4109                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4110                                     "qla_target(%d): imm_srr_id "
4111                                     "== ctio_srr_id (%d), but there is no "
4112                                     "corresponding SRR CTIO, deleting IMM "
4113                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4114                                     imm);
4115                                 list_del(&imm->srr_list_entry);
4116
4117                                 kfree(imm);
4118
4119                                 spin_unlock(&tgt->srr_lock);
4120                                 goto out_reject;
4121                         }
4122                 }
4123                 spin_unlock(&tgt->srr_lock);
4124         } else {
4125                 struct qla_tgt_srr_ctio *ts;
4126
4127                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4128                     "qla_target(%d): Unable to allocate SRR IMM "
4129                     "entry, SRR request will be rejected\n", vha->vp_idx);
4130
4131                 /* IRQ is already OFF */
4132                 spin_lock(&tgt->srr_lock);
4133                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4134                     srr_list_entry) {
4135                         if (sctio->srr_id == tgt->imm_srr_id) {
4136                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4137                                     "CTIO SRR %p deleted (id %d)\n",
4138                                     sctio, sctio->srr_id);
4139                                 list_del(&sctio->srr_list_entry);
4140                                 qlt_send_term_exchange(vha, sctio->cmd,
4141                                     &sctio->cmd->atio, 1);
4142                                 kfree(sctio);
4143                         }
4144                 }
4145                 spin_unlock(&tgt->srr_lock);
4146                 goto out_reject;
4147         }
4148
4149         return;
4150
4151 out_reject:
4152         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4153             NOTIFY_ACK_SRR_FLAGS_REJECT,
4154             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4155             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4156 }
4157
4158 /*
4159  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4160  */
4161 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4162         struct imm_ntfy_from_isp *iocb)
4163 {
4164         struct qla_hw_data *ha = vha->hw;
4165         uint32_t add_flags = 0;
4166         int send_notify_ack = 1;
4167         uint16_t status;
4168
4169         status = le16_to_cpu(iocb->u.isp2x.status);
4170         switch (status) {
4171         case IMM_NTFY_LIP_RESET:
4172         {
4173                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4174                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4175                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4176                     iocb->u.isp24.status_subcode);
4177
4178                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4179                         send_notify_ack = 0;
4180                 break;
4181         }
4182
4183         case IMM_NTFY_LIP_LINK_REINIT:
4184         {
4185                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4186                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4187                     "qla_target(%d): LINK REINIT (loop %#x, "
4188                     "subcode %x)\n", vha->vp_idx,
4189                     le16_to_cpu(iocb->u.isp24.nport_handle),
4190                     iocb->u.isp24.status_subcode);
4191                 if (tgt->link_reinit_iocb_pending) {
4192                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4193                             0, 0, 0, 0, 0, 0);
4194                 }
4195                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4196                 tgt->link_reinit_iocb_pending = 1;
4197                 /*
4198                  * QLogic requires to wait after LINK REINIT for possible
4199                  * PDISC or ADISC ELS commands
4200                  */
4201                 send_notify_ack = 0;
4202                 break;
4203         }
4204
4205         case IMM_NTFY_PORT_LOGOUT:
4206                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4207                     "qla_target(%d): Port logout (loop "
4208                     "%#x, subcode %x)\n", vha->vp_idx,
4209                     le16_to_cpu(iocb->u.isp24.nport_handle),
4210                     iocb->u.isp24.status_subcode);
4211
4212                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4213                         send_notify_ack = 0;
4214                 /* The sessions will be cleared in the callback, if needed */
4215                 break;
4216
4217         case IMM_NTFY_GLBL_TPRLO:
4218                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4219                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4220                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4221                         send_notify_ack = 0;
4222                 /* The sessions will be cleared in the callback, if needed */
4223                 break;
4224
4225         case IMM_NTFY_PORT_CONFIG:
4226                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4227                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4228                     status);
4229                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4230                         send_notify_ack = 0;
4231                 /* The sessions will be cleared in the callback, if needed */
4232                 break;
4233
4234         case IMM_NTFY_GLBL_LOGO:
4235                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4236                     "qla_target(%d): Link failure detected\n",
4237                     vha->vp_idx);
4238                 /* I_T nexus loss */
4239                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4240                         send_notify_ack = 0;
4241                 break;
4242
4243         case IMM_NTFY_IOCB_OVERFLOW:
4244                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4245                     "qla_target(%d): Cannot provide requested "
4246                     "capability (IOCB overflowed the immediate notify "
4247                     "resource count)\n", vha->vp_idx);
4248                 break;
4249
4250         case IMM_NTFY_ABORT_TASK:
4251                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4252                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4253                     "L %#x)\n", vha->vp_idx,
4254                     le16_to_cpu(iocb->u.isp2x.seq_id),
4255                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4256                     le16_to_cpu(iocb->u.isp2x.lun));
4257                 if (qlt_abort_task(vha, iocb) == 0)
4258                         send_notify_ack = 0;
4259                 break;
4260
4261         case IMM_NTFY_RESOURCE:
4262                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4263                     "qla_target(%d): Out of resources, host %ld\n",
4264                     vha->vp_idx, vha->host_no);
4265                 break;
4266
4267         case IMM_NTFY_MSG_RX:
4268                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4269                     "qla_target(%d): Immediate notify task %x\n",
4270                     vha->vp_idx, iocb->u.isp2x.task_flags);
4271                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4272                         send_notify_ack = 0;
4273                 break;
4274
4275         case IMM_NTFY_ELS:
4276                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4277                         send_notify_ack = 0;
4278                 break;
4279
4280         case IMM_NTFY_SRR:
4281                 qlt_prepare_srr_imm(vha, iocb);
4282                 send_notify_ack = 0;
4283                 break;
4284
4285         default:
4286                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4287                     "qla_target(%d): Received unknown immediate "
4288                     "notify status %x\n", vha->vp_idx, status);
4289                 break;
4290         }
4291
4292         if (send_notify_ack)
4293                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4294 }
4295
4296 /*
4297  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4298  * This function sends busy to ISP 2xxx or 24xx.
4299  */
4300 static int __qlt_send_busy(struct scsi_qla_host *vha,
4301         struct atio_from_isp *atio, uint16_t status)
4302 {
4303         struct ctio7_to_24xx *ctio24;
4304         struct qla_hw_data *ha = vha->hw;
4305         request_t *pkt;
4306         struct qla_tgt_sess *sess = NULL;
4307
4308         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4309             atio->u.isp24.fcp_hdr.s_id);
4310         if (!sess) {
4311                 qlt_send_term_exchange(vha, NULL, atio, 1);
4312                 return 0;
4313         }
4314         /* Sending marker isn't necessary, since we called from ISR */
4315
4316         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4317         if (!pkt) {
4318                 ql_dbg(ql_dbg_io, vha, 0x3063,
4319                     "qla_target(%d): %s failed: unable to allocate "
4320                     "request packet", vha->vp_idx, __func__);
4321                 return -ENOMEM;
4322         }
4323
4324         pkt->entry_count = 1;
4325         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4326
4327         ctio24 = (struct ctio7_to_24xx *)pkt;
4328         ctio24->entry_type = CTIO_TYPE7;
4329         ctio24->nport_handle = sess->loop_id;
4330         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4331         ctio24->vp_index = vha->vp_idx;
4332         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4333         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4334         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4335         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4336         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4337             __constant_cpu_to_le16(
4338                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4339                 CTIO7_FLAGS_DONT_RET_CTIO);
4340         /*
4341          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4342          * if the explicit conformation is used.
4343          */
4344         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4345         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4346         /* Memory Barrier */
4347         wmb();
4348         qla2x00_start_iocbs(vha, vha->req);
4349         return 0;
4350 }
4351
4352 /*
4353  * This routine is used to allocate a command for either a QFull condition
4354  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4355  * out previously.
4356  */
4357 static void
4358 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4359         struct atio_from_isp *atio, uint16_t status, int qfull)
4360 {
4361         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4362         struct qla_hw_data *ha = vha->hw;
4363         struct qla_tgt_sess *sess;
4364         struct se_session *se_sess;
4365         struct qla_tgt_cmd *cmd;
4366         int tag;
4367
4368         if (unlikely(tgt->tgt_stop)) {
4369                 ql_dbg(ql_dbg_io, vha, 0x300a,
4370                         "New command while device %p is shutting down\n", tgt);
4371                 return;
4372         }
4373
4374         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4375                 vha->hw->tgt.num_qfull_cmds_dropped++;
4376                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4377                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4378                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4379                                 vha->hw->tgt.num_qfull_cmds_dropped;
4380
4381                 ql_dbg(ql_dbg_io, vha, 0x3068,
4382                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4383                         vha->vp_idx, __func__,
4384                         vha->hw->tgt.num_qfull_cmds_dropped);
4385
4386                 qlt_chk_exch_leak_thresh_hold(vha);
4387                 return;
4388         }
4389
4390         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4391                 (vha, atio->u.isp24.fcp_hdr.s_id);
4392         if (!sess)
4393                 return;
4394
4395         se_sess = sess->se_sess;
4396
4397         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4398         if (tag < 0)
4399                 return;
4400
4401         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4402         if (!cmd) {
4403                 ql_dbg(ql_dbg_io, vha, 0x3009,
4404                         "qla_target(%d): %s: Allocation of cmd failed\n",
4405                         vha->vp_idx, __func__);
4406
4407                 vha->hw->tgt.num_qfull_cmds_dropped++;
4408                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4409                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4410                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4411                                 vha->hw->tgt.num_qfull_cmds_dropped;
4412
4413                 qlt_chk_exch_leak_thresh_hold(vha);
4414                 return;
4415         }
4416
4417         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4418
4419         qlt_incr_num_pend_cmds(vha);
4420         INIT_LIST_HEAD(&cmd->cmd_list);
4421         memcpy(&cmd->atio, atio, sizeof(*atio));
4422
4423         cmd->tgt = vha->vha_tgt.qla_tgt;
4424         cmd->vha = vha;
4425         cmd->reset_count = vha->hw->chip_reset;
4426         cmd->q_full = 1;
4427
4428         if (qfull) {
4429                 cmd->q_full = 1;
4430                 /* NOTE: borrowing the state field to carry the status */
4431                 cmd->state = status;
4432         } else
4433                 cmd->term_exchg = 1;
4434
4435         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
4436
4437         vha->hw->tgt.num_qfull_cmds_alloc++;
4438         if (vha->hw->tgt.num_qfull_cmds_alloc >
4439                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
4440                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
4441                         vha->hw->tgt.num_qfull_cmds_alloc;
4442 }
4443
4444 int
4445 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
4446 {
4447         struct qla_hw_data *ha = vha->hw;
4448         unsigned long flags;
4449         struct qla_tgt_cmd *cmd, *tcmd;
4450         struct list_head free_list;
4451         int rc = 0;
4452
4453         if (list_empty(&ha->tgt.q_full_list))
4454                 return 0;
4455
4456         INIT_LIST_HEAD(&free_list);
4457
4458         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
4459
4460         if (list_empty(&ha->tgt.q_full_list)) {
4461                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4462                 return 0;
4463         }
4464
4465         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
4466                 if (cmd->q_full)
4467                         /* cmd->state is a borrowed field to hold status */
4468                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
4469                 else if (cmd->term_exchg)
4470                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
4471
4472                 if (rc == -ENOMEM)
4473                         break;
4474
4475                 if (cmd->q_full)
4476                         ql_dbg(ql_dbg_io, vha, 0x3006,
4477                             "%s: busy sent for ox_id[%04x]\n", __func__,
4478                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4479                 else if (cmd->term_exchg)
4480                         ql_dbg(ql_dbg_io, vha, 0x3007,
4481                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
4482                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4483                 else
4484                         ql_dbg(ql_dbg_io, vha, 0x3008,
4485                             "%s: Unexpected cmd in QFull list %p\n", __func__,
4486                             cmd);
4487
4488                 list_del(&cmd->cmd_list);
4489                 list_add_tail(&cmd->cmd_list, &free_list);
4490
4491                 /* piggy back on hardware_lock for protection */
4492                 vha->hw->tgt.num_qfull_cmds_alloc--;
4493         }
4494         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4495
4496         cmd = NULL;
4497
4498         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
4499                 list_del(&cmd->cmd_list);
4500                 /* This cmd was never sent to TCM.  There is no need
4501                  * to schedule free or call free_cmd
4502                  */
4503                 qlt_free_cmd(cmd);
4504         }
4505         return rc;
4506 }
4507
4508 static void
4509 qlt_send_busy(struct scsi_qla_host *vha,
4510         struct atio_from_isp *atio, uint16_t status)
4511 {
4512         int rc = 0;
4513
4514         rc = __qlt_send_busy(vha, atio, status);
4515         if (rc == -ENOMEM)
4516                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
4517 }
4518
4519 static int
4520 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
4521         struct atio_from_isp *atio)
4522 {
4523         struct qla_hw_data *ha = vha->hw;
4524         uint16_t status;
4525
4526         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
4527                 return 0;
4528
4529         status = temp_sam_status;
4530         qlt_send_busy(vha, atio, status);
4531         return 1;
4532 }
4533
4534 /* ha->hardware_lock supposed to be held on entry */
4535 /* called via callback from qla2xxx */
4536 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4537         struct atio_from_isp *atio)
4538 {
4539         struct qla_hw_data *ha = vha->hw;
4540         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4541         int rc;
4542
4543         if (unlikely(tgt == NULL)) {
4544                 ql_dbg(ql_dbg_io, vha, 0x3064,
4545                     "ATIO pkt, but no tgt (ha %p)", ha);
4546                 return;
4547         }
4548         /*
4549          * In tgt_stop mode we also should allow all requests to pass.
4550          * Otherwise, some commands can stuck.
4551          */
4552
4553         tgt->irq_cmd_count++;
4554
4555         switch (atio->u.raw.entry_type) {
4556         case ATIO_TYPE7:
4557                 if (unlikely(atio->u.isp24.exchange_addr ==
4558                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4559                         ql_dbg(ql_dbg_io, vha, 0x3065,
4560                             "qla_target(%d): ATIO_TYPE7 "
4561                             "received with UNKNOWN exchange address, "
4562                             "sending QUEUE_FULL\n", vha->vp_idx);
4563                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4564                         break;
4565                 }
4566
4567
4568
4569                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
4570                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
4571                         if (rc != 0) {
4572                                 tgt->irq_cmd_count--;
4573                                 return;
4574                         }
4575                         rc = qlt_handle_cmd_for_atio(vha, atio);
4576                 } else {
4577                         rc = qlt_handle_task_mgmt(vha, atio);
4578                 }
4579                 if (unlikely(rc != 0)) {
4580                         if (rc == -ESRCH) {
4581 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4582                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4583 #else
4584                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4585 #endif
4586                         } else {
4587                                 if (tgt->tgt_stop) {
4588                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
4589                                             "qla_target: Unable to send "
4590                                             "command to target for req, "
4591                                             "ignoring.\n");
4592                                 } else {
4593                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4594                                             "qla_target(%d): Unable to send "
4595                                             "command to target, sending BUSY "
4596                                             "status.\n", vha->vp_idx);
4597                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4598                                 }
4599                         }
4600                 }
4601                 break;
4602
4603         case IMMED_NOTIFY_TYPE:
4604         {
4605                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4606                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4607                             "qla_target(%d): Received ATIO packet %x "
4608                             "with error status %x\n", vha->vp_idx,
4609                             atio->u.raw.entry_type,
4610                             atio->u.isp2x.entry_status);
4611                         break;
4612                 }
4613                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4614                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4615                 break;
4616         }
4617
4618         default:
4619                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4620                     "qla_target(%d): Received unknown ATIO atio "
4621                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4622                 break;
4623         }
4624
4625         tgt->irq_cmd_count--;
4626 }
4627
4628 /* ha->hardware_lock supposed to be held on entry */
4629 /* called via callback from qla2xxx */
4630 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4631 {
4632         struct qla_hw_data *ha = vha->hw;
4633         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4634
4635         if (unlikely(tgt == NULL)) {
4636                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4637                     "qla_target(%d): Response pkt %x received, but no "
4638                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4639                 return;
4640         }
4641
4642         /*
4643          * In tgt_stop mode we also should allow all requests to pass.
4644          * Otherwise, some commands can stuck.
4645          */
4646
4647         tgt->irq_cmd_count++;
4648
4649         switch (pkt->entry_type) {
4650         case CTIO_CRC2:
4651         case CTIO_TYPE7:
4652         {
4653                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4654                 qlt_do_ctio_completion(vha, entry->handle,
4655                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4656                     entry);
4657                 break;
4658         }
4659
4660         case ACCEPT_TGT_IO_TYPE:
4661         {
4662                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4663                 int rc;
4664                 if (atio->u.isp2x.status !=
4665                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4666                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4667                             "qla_target(%d): ATIO with error "
4668                             "status %x received\n", vha->vp_idx,
4669                             le16_to_cpu(atio->u.isp2x.status));
4670                         break;
4671                 }
4672
4673                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4674                 if (rc != 0) {
4675                         tgt->irq_cmd_count--;
4676                         return;
4677                 }
4678
4679                 rc = qlt_handle_cmd_for_atio(vha, atio);
4680                 if (unlikely(rc != 0)) {
4681                         if (rc == -ESRCH) {
4682 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4683                                 qlt_send_busy(vha, atio, 0);
4684 #else
4685                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4686 #endif
4687                         } else {
4688                                 if (tgt->tgt_stop) {
4689                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4690                                             "qla_target: Unable to send "
4691                                             "command to target, sending TERM "
4692                                             "EXCHANGE for rsp\n");
4693                                         qlt_send_term_exchange(vha, NULL,
4694                                             atio, 1);
4695                                 } else {
4696                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
4697                                             "qla_target(%d): Unable to send "
4698                                             "command to target, sending BUSY "
4699                                             "status\n", vha->vp_idx);
4700                                         qlt_send_busy(vha, atio, 0);
4701                                 }
4702                         }
4703                 }
4704         }
4705         break;
4706
4707         case CONTINUE_TGT_IO_TYPE:
4708         {
4709                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4710                 qlt_do_ctio_completion(vha, entry->handle,
4711                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4712                     entry);
4713                 break;
4714         }
4715
4716         case CTIO_A64_TYPE:
4717         {
4718                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4719                 qlt_do_ctio_completion(vha, entry->handle,
4720                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4721                     entry);
4722                 break;
4723         }
4724
4725         case IMMED_NOTIFY_TYPE:
4726                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4727                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4728                 break;
4729
4730         case NOTIFY_ACK_TYPE:
4731                 if (tgt->notify_ack_expected > 0) {
4732                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4733                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
4734                             "NOTIFY_ACK seq %08x status %x\n",
4735                             le16_to_cpu(entry->u.isp2x.seq_id),
4736                             le16_to_cpu(entry->u.isp2x.status));
4737                         tgt->notify_ack_expected--;
4738                         if (entry->u.isp2x.status !=
4739                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4740                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4741                                     "qla_target(%d): NOTIFY_ACK "
4742                                     "failed %x\n", vha->vp_idx,
4743                                     le16_to_cpu(entry->u.isp2x.status));
4744                         }
4745                 } else {
4746                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
4747                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4748                             vha->vp_idx);
4749                 }
4750                 break;
4751
4752         case ABTS_RECV_24XX:
4753                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4754                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4755                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4756                 break;
4757
4758         case ABTS_RESP_24XX:
4759                 if (tgt->abts_resp_expected > 0) {
4760                         struct abts_resp_from_24xx_fw *entry =
4761                                 (struct abts_resp_from_24xx_fw *)pkt;
4762                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
4763                             "ABTS_RESP_24XX: compl_status %x\n",
4764                             entry->compl_status);
4765                         tgt->abts_resp_expected--;
4766                         if (le16_to_cpu(entry->compl_status) !=
4767                             ABTS_RESP_COMPL_SUCCESS) {
4768                                 if ((entry->error_subcode1 == 0x1E) &&
4769                                     (entry->error_subcode2 == 0)) {
4770                                         /*
4771                                          * We've got a race here: aborted
4772                                          * exchange not terminated, i.e.
4773                                          * response for the aborted command was
4774                                          * sent between the abort request was
4775                                          * received and processed.
4776                                          * Unfortunately, the firmware has a
4777                                          * silly requirement that all aborted
4778                                          * exchanges must be explicitely
4779                                          * terminated, otherwise it refuses to
4780                                          * send responses for the abort
4781                                          * requests. So, we have to
4782                                          * (re)terminate the exchange and retry
4783                                          * the abort response.
4784                                          */
4785                                         qlt_24xx_retry_term_exchange(vha,
4786                                             entry);
4787                                 } else
4788                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
4789                                             "qla_target(%d): ABTS_RESP_24XX "
4790                                             "failed %x (subcode %x:%x)",
4791                                             vha->vp_idx, entry->compl_status,
4792                                             entry->error_subcode1,
4793                                             entry->error_subcode2);
4794                         }
4795                 } else {
4796                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
4797                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
4798                             "received\n", vha->vp_idx);
4799                 }
4800                 break;
4801
4802         default:
4803                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4804                     "qla_target(%d): Received unknown response pkt "
4805                     "type %x\n", vha->vp_idx, pkt->entry_type);
4806                 break;
4807         }
4808
4809         tgt->irq_cmd_count--;
4810 }
4811
4812 /*
4813  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4814  */
4815 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4816         uint16_t *mailbox)
4817 {
4818         struct qla_hw_data *ha = vha->hw;
4819         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4820         int login_code;
4821
4822         if (!ha->tgt.tgt_ops)
4823                 return;
4824
4825         if (unlikely(tgt == NULL)) {
4826                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4827                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4828                 return;
4829         }
4830
4831         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4832             IS_QLA2100(ha))
4833                 return;
4834         /*
4835          * In tgt_stop mode we also should allow all requests to pass.
4836          * Otherwise, some commands can stuck.
4837          */
4838
4839         tgt->irq_cmd_count++;
4840
4841         switch (code) {
4842         case MBA_RESET:                 /* Reset */
4843         case MBA_SYSTEM_ERR:            /* System Error */
4844         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
4845         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
4846                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4847                     "qla_target(%d): System error async event %#x "
4848                     "occurred", vha->vp_idx, code);
4849                 break;
4850         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
4851                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4852                 break;
4853
4854         case MBA_LOOP_UP:
4855         {
4856                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4857                     "qla_target(%d): Async LOOP_UP occurred "
4858                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4859                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4860                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4861                 if (tgt->link_reinit_iocb_pending) {
4862                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4863                             0, 0, 0, 0, 0, 0);
4864                         tgt->link_reinit_iocb_pending = 0;
4865                 }
4866                 break;
4867         }
4868
4869         case MBA_LIP_OCCURRED:
4870         case MBA_LOOP_DOWN:
4871         case MBA_LIP_RESET:
4872         case MBA_RSCN_UPDATE:
4873                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4874                     "qla_target(%d): Async event %#x occurred "
4875                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4876                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4877                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4878                 break;
4879
4880         case MBA_PORT_UPDATE:
4881                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4882                     "qla_target(%d): Port update async event %#x "
4883                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4884                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4885                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4886                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4887
4888                 login_code = le16_to_cpu(mailbox[2]);
4889                 if (login_code == 0x4)
4890                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4891                             "Async MB 2: Got PLOGI Complete\n");
4892                 else if (login_code == 0x7)
4893                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4894                             "Async MB 2: Port Logged Out\n");
4895                 break;
4896
4897         default:
4898                 break;
4899         }
4900
4901         tgt->irq_cmd_count--;
4902 }
4903
4904 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4905         uint16_t loop_id)
4906 {
4907         fc_port_t *fcport;
4908         int rc;
4909
4910         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4911         if (!fcport) {
4912                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4913                     "qla_target(%d): Allocation of tmp FC port failed",
4914                     vha->vp_idx);
4915                 return NULL;
4916         }
4917
4918         fcport->loop_id = loop_id;
4919
4920         rc = qla2x00_get_port_database(vha, fcport, 0);
4921         if (rc != QLA_SUCCESS) {
4922                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4923                     "qla_target(%d): Failed to retrieve fcport "
4924                     "information -- get_port_database() returned %x "
4925                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4926                 kfree(fcport);
4927                 return NULL;
4928         }
4929
4930         return fcport;
4931 }
4932
4933 /* Must be called under tgt_mutex */
4934 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4935         uint8_t *s_id)
4936 {
4937         struct qla_tgt_sess *sess = NULL;
4938         fc_port_t *fcport = NULL;
4939         int rc, global_resets;
4940         uint16_t loop_id = 0;
4941
4942 retry:
4943         global_resets =
4944             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4945
4946         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4947         if (rc != 0) {
4948                 if ((s_id[0] == 0xFF) &&
4949                     (s_id[1] == 0xFC)) {
4950                         /*
4951                          * This is Domain Controller, so it should be
4952                          * OK to drop SCSI commands from it.
4953                          */
4954                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4955                             "Unable to find initiator with S_ID %x:%x:%x",
4956                             s_id[0], s_id[1], s_id[2]);
4957                 } else
4958                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4959                             "qla_target(%d): Unable to find "
4960                             "initiator with S_ID %x:%x:%x",
4961                             vha->vp_idx, s_id[0], s_id[1],
4962                             s_id[2]);
4963                 return NULL;
4964         }
4965
4966         fcport = qlt_get_port_database(vha, loop_id);
4967         if (!fcport)
4968                 return NULL;
4969
4970         if (global_resets !=
4971             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4972                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4973                     "qla_target(%d): global reset during session discovery "
4974                     "(counter was %d, new %d), retrying", vha->vp_idx,
4975                     global_resets,
4976                     atomic_read(&vha->vha_tgt.
4977                         qla_tgt->tgt_global_resets_count));
4978                 goto retry;
4979         }
4980
4981         sess = qlt_create_sess(vha, fcport, true);
4982
4983         kfree(fcport);
4984         return sess;
4985 }
4986
4987 static void qlt_abort_work(struct qla_tgt *tgt,
4988         struct qla_tgt_sess_work_param *prm)
4989 {
4990         struct scsi_qla_host *vha = tgt->vha;
4991         struct qla_hw_data *ha = vha->hw;
4992         struct qla_tgt_sess *sess = NULL;
4993         unsigned long flags;
4994         uint32_t be_s_id;
4995         uint8_t s_id[3];
4996         int rc;
4997
4998         spin_lock_irqsave(&ha->hardware_lock, flags);
4999
5000         if (tgt->tgt_stop)
5001                 goto out_term;
5002
5003         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5004         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5005         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5006
5007         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5008             (unsigned char *)&be_s_id);
5009         if (!sess) {
5010                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5011
5012                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5013                 sess = qlt_make_local_sess(vha, s_id);
5014                 /* sess has got an extra creation ref */
5015                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5016
5017                 spin_lock_irqsave(&ha->hardware_lock, flags);
5018                 if (!sess)
5019                         goto out_term;
5020         } else {
5021                 kref_get(&sess->se_sess->sess_kref);
5022         }
5023
5024         if (tgt->tgt_stop)
5025                 goto out_term;
5026
5027         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5028         if (rc != 0)
5029                 goto out_term;
5030
5031         ha->tgt.tgt_ops->put_sess(sess);
5032         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5033         return;
5034
5035 out_term:
5036         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5037         if (sess)
5038                 ha->tgt.tgt_ops->put_sess(sess);
5039         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5040 }
5041
5042 static void qlt_tmr_work(struct qla_tgt *tgt,
5043         struct qla_tgt_sess_work_param *prm)
5044 {
5045         struct atio_from_isp *a = &prm->tm_iocb2;
5046         struct scsi_qla_host *vha = tgt->vha;
5047         struct qla_hw_data *ha = vha->hw;
5048         struct qla_tgt_sess *sess = NULL;
5049         unsigned long flags;
5050         uint8_t *s_id = NULL; /* to hide compiler warnings */
5051         int rc;
5052         uint32_t lun, unpacked_lun;
5053         int lun_size, fn;
5054         void *iocb;
5055
5056         spin_lock_irqsave(&ha->hardware_lock, flags);
5057
5058         if (tgt->tgt_stop)
5059                 goto out_term;
5060
5061         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5062         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5063         if (!sess) {
5064                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5065
5066                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5067                 sess = qlt_make_local_sess(vha, s_id);
5068                 /* sess has got an extra creation ref */
5069                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5070
5071                 spin_lock_irqsave(&ha->hardware_lock, flags);
5072                 if (!sess)
5073                         goto out_term;
5074         } else {
5075                 kref_get(&sess->se_sess->sess_kref);
5076         }
5077
5078         iocb = a;
5079         lun = a->u.isp24.fcp_cmnd.lun;
5080         lun_size = sizeof(lun);
5081         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5082         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5083
5084         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5085         if (rc != 0)
5086                 goto out_term;
5087
5088         ha->tgt.tgt_ops->put_sess(sess);
5089         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5090         return;
5091
5092 out_term:
5093         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5094         if (sess)
5095                 ha->tgt.tgt_ops->put_sess(sess);
5096         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5097 }
5098
5099 static void qlt_sess_work_fn(struct work_struct *work)
5100 {
5101         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5102         struct scsi_qla_host *vha = tgt->vha;
5103         unsigned long flags;
5104
5105         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5106
5107         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5108         while (!list_empty(&tgt->sess_works_list)) {
5109                 struct qla_tgt_sess_work_param *prm = list_entry(
5110                     tgt->sess_works_list.next, typeof(*prm),
5111                     sess_works_list_entry);
5112
5113                 /*
5114                  * This work can be scheduled on several CPUs at time, so we
5115                  * must delete the entry to eliminate double processing
5116                  */
5117                 list_del(&prm->sess_works_list_entry);
5118
5119                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5120
5121                 switch (prm->type) {
5122                 case QLA_TGT_SESS_WORK_ABORT:
5123                         qlt_abort_work(tgt, prm);
5124                         break;
5125                 case QLA_TGT_SESS_WORK_TM:
5126                         qlt_tmr_work(tgt, prm);
5127                         break;
5128                 default:
5129                         BUG_ON(1);
5130                         break;
5131                 }
5132
5133                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5134
5135                 kfree(prm);
5136         }
5137         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5138 }
5139
5140 /* Must be called under tgt_host_action_mutex */
5141 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5142 {
5143         struct qla_tgt *tgt;
5144
5145         if (!QLA_TGT_MODE_ENABLED())
5146                 return 0;
5147
5148         if (!IS_TGT_MODE_CAPABLE(ha)) {
5149                 ql_log(ql_log_warn, base_vha, 0xe070,
5150                     "This adapter does not support target mode.\n");
5151                 return 0;
5152         }
5153
5154         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5155             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5156
5157         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5158
5159         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5160         if (!tgt) {
5161                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5162                     "Unable to allocate struct qla_tgt\n");
5163                 return -ENOMEM;
5164         }
5165
5166         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5167                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5168
5169         tgt->ha = ha;
5170         tgt->vha = base_vha;
5171         init_waitqueue_head(&tgt->waitQ);
5172         INIT_LIST_HEAD(&tgt->sess_list);
5173         INIT_LIST_HEAD(&tgt->del_sess_list);
5174         INIT_DELAYED_WORK(&tgt->sess_del_work,
5175                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5176         spin_lock_init(&tgt->sess_work_lock);
5177         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5178         INIT_LIST_HEAD(&tgt->sess_works_list);
5179         spin_lock_init(&tgt->srr_lock);
5180         INIT_LIST_HEAD(&tgt->srr_ctio_list);
5181         INIT_LIST_HEAD(&tgt->srr_imm_list);
5182         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5183         atomic_set(&tgt->tgt_global_resets_count, 0);
5184
5185         base_vha->vha_tgt.qla_tgt = tgt;
5186
5187         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5188                 "qla_target(%d): using 64 Bit PCI addressing",
5189                 base_vha->vp_idx);
5190         tgt->tgt_enable_64bit_addr = 1;
5191         /* 3 is reserved */
5192         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5193         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5194         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5195
5196         if (base_vha->fc_vport)
5197                 return 0;
5198
5199         mutex_lock(&qla_tgt_mutex);
5200         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5201         mutex_unlock(&qla_tgt_mutex);
5202
5203         return 0;
5204 }
5205
5206 /* Must be called under tgt_host_action_mutex */
5207 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5208 {
5209         if (!vha->vha_tgt.qla_tgt)
5210                 return 0;
5211
5212         if (vha->fc_vport) {
5213                 qlt_release(vha->vha_tgt.qla_tgt);
5214                 return 0;
5215         }
5216
5217         /* free left over qfull cmds */
5218         qlt_init_term_exchange(vha);
5219
5220         mutex_lock(&qla_tgt_mutex);
5221         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5222         mutex_unlock(&qla_tgt_mutex);
5223
5224         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5225             vha->host_no, ha);
5226         qlt_release(vha->vha_tgt.qla_tgt);
5227
5228         return 0;
5229 }
5230
5231 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5232         unsigned char *b)
5233 {
5234         int i;
5235
5236         pr_debug("qla2xxx HW vha->node_name: ");
5237         for (i = 0; i < WWN_SIZE; i++)
5238                 pr_debug("%02x ", vha->node_name[i]);
5239         pr_debug("\n");
5240         pr_debug("qla2xxx HW vha->port_name: ");
5241         for (i = 0; i < WWN_SIZE; i++)
5242                 pr_debug("%02x ", vha->port_name[i]);
5243         pr_debug("\n");
5244
5245         pr_debug("qla2xxx passed configfs WWPN: ");
5246         put_unaligned_be64(wwpn, b);
5247         for (i = 0; i < WWN_SIZE; i++)
5248                 pr_debug("%02x ", b[i]);
5249         pr_debug("\n");
5250 }
5251
5252 /**
5253  * qla_tgt_lport_register - register lport with external module
5254  *
5255  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5256  * @wwpn: Passwd FC target WWPN
5257  * @callback:  lport initialization callback for tcm_qla2xxx code
5258  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5259  */
5260 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5261                        u64 npiv_wwpn, u64 npiv_wwnn,
5262                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5263 {
5264         struct qla_tgt *tgt;
5265         struct scsi_qla_host *vha;
5266         struct qla_hw_data *ha;
5267         struct Scsi_Host *host;
5268         unsigned long flags;
5269         int rc;
5270         u8 b[WWN_SIZE];
5271
5272         mutex_lock(&qla_tgt_mutex);
5273         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5274                 vha = tgt->vha;
5275                 ha = vha->hw;
5276
5277                 host = vha->host;
5278                 if (!host)
5279                         continue;
5280
5281                 if (!(host->hostt->supported_mode & MODE_TARGET))
5282                         continue;
5283
5284                 spin_lock_irqsave(&ha->hardware_lock, flags);
5285                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5286                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5287                             host->host_no);
5288                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5289                         continue;
5290                 }
5291                 if (tgt->tgt_stop) {
5292                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5293                                  host->host_no);
5294                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5295                         continue;
5296                 }
5297                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5298
5299                 if (!scsi_host_get(host)) {
5300                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
5301                             "Unable to scsi_host_get() for"
5302                             " qla2xxx scsi_host\n");
5303                         continue;
5304                 }
5305                 qlt_lport_dump(vha, phys_wwpn, b);
5306
5307                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5308                         scsi_host_put(host);
5309                         continue;
5310                 }
5311                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5312                 if (rc != 0)
5313                         scsi_host_put(host);
5314
5315                 mutex_unlock(&qla_tgt_mutex);
5316                 return rc;
5317         }
5318         mutex_unlock(&qla_tgt_mutex);
5319
5320         return -ENODEV;
5321 }
5322 EXPORT_SYMBOL(qlt_lport_register);
5323
5324 /**
5325  * qla_tgt_lport_deregister - Degister lport
5326  *
5327  * @vha:  Registered scsi_qla_host pointer
5328  */
5329 void qlt_lport_deregister(struct scsi_qla_host *vha)
5330 {
5331         struct qla_hw_data *ha = vha->hw;
5332         struct Scsi_Host *sh = vha->host;
5333         /*
5334          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5335          */
5336         vha->vha_tgt.target_lport_ptr = NULL;
5337         ha->tgt.tgt_ops = NULL;
5338         /*
5339          * Release the Scsi_Host reference for the underlying qla2xxx host
5340          */
5341         scsi_host_put(sh);
5342 }
5343 EXPORT_SYMBOL(qlt_lport_deregister);
5344
5345 /* Must be called under HW lock */
5346 static void qlt_set_mode(struct scsi_qla_host *vha)
5347 {
5348         struct qla_hw_data *ha = vha->hw;
5349
5350         switch (ql2x_ini_mode) {
5351         case QLA2XXX_INI_MODE_DISABLED:
5352         case QLA2XXX_INI_MODE_EXCLUSIVE:
5353                 vha->host->active_mode = MODE_TARGET;
5354                 break;
5355         case QLA2XXX_INI_MODE_ENABLED:
5356                 vha->host->active_mode |= MODE_TARGET;
5357                 break;
5358         default:
5359                 break;
5360         }
5361
5362         if (ha->tgt.ini_mode_force_reverse)
5363                 qla_reverse_ini_mode(vha);
5364 }
5365
5366 /* Must be called under HW lock */
5367 static void qlt_clear_mode(struct scsi_qla_host *vha)
5368 {
5369         struct qla_hw_data *ha = vha->hw;
5370
5371         switch (ql2x_ini_mode) {
5372         case QLA2XXX_INI_MODE_DISABLED:
5373                 vha->host->active_mode = MODE_UNKNOWN;
5374                 break;
5375         case QLA2XXX_INI_MODE_EXCLUSIVE:
5376                 vha->host->active_mode = MODE_INITIATOR;
5377                 break;
5378         case QLA2XXX_INI_MODE_ENABLED:
5379                 vha->host->active_mode &= ~MODE_TARGET;
5380                 break;
5381         default:
5382                 break;
5383         }
5384
5385         if (ha->tgt.ini_mode_force_reverse)
5386                 qla_reverse_ini_mode(vha);
5387 }
5388
5389 /*
5390  * qla_tgt_enable_vha - NO LOCK HELD
5391  *
5392  * host_reset, bring up w/ Target Mode Enabled
5393  */
5394 void
5395 qlt_enable_vha(struct scsi_qla_host *vha)
5396 {
5397         struct qla_hw_data *ha = vha->hw;
5398         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5399         unsigned long flags;
5400         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5401
5402         if (!tgt) {
5403                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5404                     "Unable to locate qla_tgt pointer from"
5405                     " struct qla_hw_data\n");
5406                 dump_stack();
5407                 return;
5408         }
5409
5410         spin_lock_irqsave(&ha->hardware_lock, flags);
5411         tgt->tgt_stopped = 0;
5412         qlt_set_mode(vha);
5413         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5414
5415         if (vha->vp_idx) {
5416                 qla24xx_disable_vp(vha);
5417                 qla24xx_enable_vp(vha);
5418         } else {
5419                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5420                 qla2xxx_wake_dpc(base_vha);
5421                 qla2x00_wait_for_hba_online(base_vha);
5422         }
5423 }
5424 EXPORT_SYMBOL(qlt_enable_vha);
5425
5426 /*
5427  * qla_tgt_disable_vha - NO LOCK HELD
5428  *
5429  * Disable Target Mode and reset the adapter
5430  */
5431 static void qlt_disable_vha(struct scsi_qla_host *vha)
5432 {
5433         struct qla_hw_data *ha = vha->hw;
5434         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5435         unsigned long flags;
5436
5437         if (!tgt) {
5438                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5439                     "Unable to locate qla_tgt pointer from"
5440                     " struct qla_hw_data\n");
5441                 dump_stack();
5442                 return;
5443         }
5444
5445         spin_lock_irqsave(&ha->hardware_lock, flags);
5446         qlt_clear_mode(vha);
5447         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5448
5449         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5450         qla2xxx_wake_dpc(vha);
5451         qla2x00_wait_for_hba_online(vha);
5452 }
5453
5454 /*
5455  * Called from qla_init.c:qla24xx_vport_create() contex to setup
5456  * the target mode specific struct scsi_qla_host and struct qla_hw_data
5457  * members.
5458  */
5459 void
5460 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5461 {
5462         if (!qla_tgt_mode_enabled(vha))
5463                 return;
5464
5465         vha->vha_tgt.qla_tgt = NULL;
5466
5467         mutex_init(&vha->vha_tgt.tgt_mutex);
5468         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5469
5470         qlt_clear_mode(vha);
5471
5472         /*
5473          * NOTE: Currently the value is kept the same for <24xx and
5474          * >=24xx ISPs. If it is necessary to change it,
5475          * the check should be added for specific ISPs,
5476          * assigning the value appropriately.
5477          */
5478         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5479
5480         qlt_add_target(ha, vha);
5481 }
5482
5483 void
5484 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5485 {
5486         /*
5487          * FC-4 Feature bit 0 indicates target functionality to the name server.
5488          */
5489         if (qla_tgt_mode_enabled(vha)) {
5490                 if (qla_ini_mode_enabled(vha))
5491                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5492                 else
5493                         ct_req->req.rff_id.fc4_feature = BIT_0;
5494         } else if (qla_ini_mode_enabled(vha)) {
5495                 ct_req->req.rff_id.fc4_feature = BIT_1;
5496         }
5497 }
5498
5499 /*
5500  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5501  * @ha: HA context
5502  *
5503  * Beginning of ATIO ring has initialization control block already built
5504  * by nvram config routine.
5505  *
5506  * Returns 0 on success.
5507  */
5508 void
5509 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5510 {
5511         struct qla_hw_data *ha = vha->hw;
5512         uint16_t cnt;
5513         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5514
5515         if (!qla_tgt_mode_enabled(vha))
5516                 return;
5517
5518         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5519                 pkt->u.raw.signature = ATIO_PROCESSED;
5520                 pkt++;
5521         }
5522
5523 }
5524
5525 /*
5526  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5527  * @ha: SCSI driver HA context
5528  */
5529 void
5530 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5531 {
5532         struct qla_hw_data *ha = vha->hw;
5533         struct atio_from_isp *pkt;
5534         int cnt, i;
5535
5536         if (!vha->flags.online)
5537                 return;
5538
5539         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5540                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5541                 cnt = pkt->u.raw.entry_count;
5542
5543                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5544
5545                 for (i = 0; i < cnt; i++) {
5546                         ha->tgt.atio_ring_index++;
5547                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5548                                 ha->tgt.atio_ring_index = 0;
5549                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5550                         } else
5551                                 ha->tgt.atio_ring_ptr++;
5552
5553                         pkt->u.raw.signature = ATIO_PROCESSED;
5554                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5555                 }
5556                 wmb();
5557         }
5558
5559         /* Adjust ring index */
5560         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5561 }
5562
5563 void
5564 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5565 {
5566         struct qla_hw_data *ha = vha->hw;
5567         if (!QLA_TGT_MODE_ENABLED())
5568                 return;
5569
5570         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5571         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5572         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5573
5574         if (IS_ATIO_MSIX_CAPABLE(ha)) {
5575                 struct qla_msix_entry *msix = &ha->msix_entries[2];
5576                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5577
5578                 icb->msix_atio = cpu_to_le16(msix->entry);
5579                 ql_dbg(ql_dbg_init, vha, 0xf072,
5580                     "Registering ICB vector 0x%x for atio que.\n",
5581                     msix->entry);
5582         }
5583 }
5584
5585 void
5586 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5587 {
5588         struct qla_hw_data *ha = vha->hw;
5589
5590         if (qla_tgt_mode_enabled(vha)) {
5591                 if (!ha->tgt.saved_set) {
5592                         /* We save only once */
5593                         ha->tgt.saved_exchange_count = nv->exchange_count;
5594                         ha->tgt.saved_firmware_options_1 =
5595                             nv->firmware_options_1;
5596                         ha->tgt.saved_firmware_options_2 =
5597                             nv->firmware_options_2;
5598                         ha->tgt.saved_firmware_options_3 =
5599                             nv->firmware_options_3;
5600                         ha->tgt.saved_set = 1;
5601                 }
5602
5603                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5604
5605                 /* Enable target mode */
5606                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5607
5608                 /* Disable ini mode, if requested */
5609                 if (!qla_ini_mode_enabled(vha))
5610                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5611
5612                 /* Disable Full Login after LIP */
5613                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5614                 /* Enable initial LIP */
5615                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5616                 if (ql2xtgt_tape_enable)
5617                         /* Enable FC Tape support */
5618                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5619                 else
5620                         /* Disable FC Tape support */
5621                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5622
5623                 /* Disable Full Login after LIP */
5624                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5625                 /* Enable target PRLI control */
5626                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5627         } else {
5628                 if (ha->tgt.saved_set) {
5629                         nv->exchange_count = ha->tgt.saved_exchange_count;
5630                         nv->firmware_options_1 =
5631                             ha->tgt.saved_firmware_options_1;
5632                         nv->firmware_options_2 =
5633                             ha->tgt.saved_firmware_options_2;
5634                         nv->firmware_options_3 =
5635                             ha->tgt.saved_firmware_options_3;
5636                 }
5637                 return;
5638         }
5639
5640         /* out-of-order frames reassembly */
5641         nv->firmware_options_3 |= BIT_6|BIT_9;
5642
5643         if (ha->tgt.enable_class_2) {
5644                 if (vha->flags.init_done)
5645                         fc_host_supported_classes(vha->host) =
5646                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5647
5648                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5649         } else {
5650                 if (vha->flags.init_done)
5651                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5652
5653                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5654         }
5655 }
5656
5657 void
5658 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5659         struct init_cb_24xx *icb)
5660 {
5661         struct qla_hw_data *ha = vha->hw;
5662
5663         if (ha->tgt.node_name_set) {
5664                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5665                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5666         }
5667 }
5668
5669 void
5670 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5671 {
5672         struct qla_hw_data *ha = vha->hw;
5673
5674         if (!QLA_TGT_MODE_ENABLED())
5675                 return;
5676
5677         if (qla_tgt_mode_enabled(vha)) {
5678                 if (!ha->tgt.saved_set) {
5679                         /* We save only once */
5680                         ha->tgt.saved_exchange_count = nv->exchange_count;
5681                         ha->tgt.saved_firmware_options_1 =
5682                             nv->firmware_options_1;
5683                         ha->tgt.saved_firmware_options_2 =
5684                             nv->firmware_options_2;
5685                         ha->tgt.saved_firmware_options_3 =
5686                             nv->firmware_options_3;
5687                         ha->tgt.saved_set = 1;
5688                 }
5689
5690                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5691
5692                 /* Enable target mode */
5693                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5694
5695                 /* Disable ini mode, if requested */
5696                 if (!qla_ini_mode_enabled(vha))
5697                         nv->firmware_options_1 |=
5698                             __constant_cpu_to_le32(BIT_5);
5699
5700                 /* Disable Full Login after LIP */
5701                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5702                 /* Enable initial LIP */
5703                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5704                 if (ql2xtgt_tape_enable)
5705                         /* Enable FC tape support */
5706                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5707                 else
5708                         /* Disable FC tape support */
5709                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5710
5711                 /* Disable Full Login after LIP */
5712                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5713                 /* Enable target PRLI control */
5714                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5715         } else {
5716                 if (ha->tgt.saved_set) {
5717                         nv->exchange_count = ha->tgt.saved_exchange_count;
5718                         nv->firmware_options_1 =
5719                             ha->tgt.saved_firmware_options_1;
5720                         nv->firmware_options_2 =
5721                             ha->tgt.saved_firmware_options_2;
5722                         nv->firmware_options_3 =
5723                             ha->tgt.saved_firmware_options_3;
5724                 }
5725                 return;
5726         }
5727
5728         /* out-of-order frames reassembly */
5729         nv->firmware_options_3 |= BIT_6|BIT_9;
5730
5731         if (ha->tgt.enable_class_2) {
5732                 if (vha->flags.init_done)
5733                         fc_host_supported_classes(vha->host) =
5734                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5735
5736                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5737         } else {
5738                 if (vha->flags.init_done)
5739                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5740
5741                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5742         }
5743 }
5744
5745 void
5746 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5747         struct init_cb_81xx *icb)
5748 {
5749         struct qla_hw_data *ha = vha->hw;
5750
5751         if (!QLA_TGT_MODE_ENABLED())
5752                 return;
5753
5754         if (ha->tgt.node_name_set) {
5755                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5756                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5757         }
5758 }
5759
5760 void
5761 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5762 {
5763         if (!QLA_TGT_MODE_ENABLED())
5764                 return;
5765
5766         ha->msix_count += 1; /* For ATIO Q */
5767 }
5768
5769 int
5770 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5771         struct sts_entry_24xx *pkt)
5772 {
5773         switch (pkt->entry_type) {
5774         case ABTS_RECV_24XX:
5775         case ABTS_RESP_24XX:
5776         case CTIO_TYPE7:
5777         case NOTIFY_ACK_TYPE:
5778         case CTIO_CRC2:
5779                 return 1;
5780         default:
5781                 return 0;
5782         }
5783 }
5784
5785 void
5786 qlt_modify_vp_config(struct scsi_qla_host *vha,
5787         struct vp_config_entry_24xx *vpmod)
5788 {
5789         if (qla_tgt_mode_enabled(vha))
5790                 vpmod->options_idx1 &= ~BIT_5;
5791         /* Disable ini mode, if requested */
5792         if (!qla_ini_mode_enabled(vha))
5793                 vpmod->options_idx1 &= ~BIT_4;
5794 }
5795
5796 void
5797 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5798 {
5799         if (!QLA_TGT_MODE_ENABLED())
5800                 return;
5801
5802         if  (ha->mqenable || IS_QLA83XX(ha)) {
5803                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5804                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5805         } else {
5806                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5807                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5808         }
5809
5810         mutex_init(&base_vha->vha_tgt.tgt_mutex);
5811         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5812         qlt_clear_mode(base_vha);
5813 }
5814
5815 irqreturn_t
5816 qla83xx_msix_atio_q(int irq, void *dev_id)
5817 {
5818         struct rsp_que *rsp;
5819         scsi_qla_host_t *vha;
5820         struct qla_hw_data *ha;
5821         unsigned long flags;
5822
5823         rsp = (struct rsp_que *) dev_id;
5824         ha = rsp->hw;
5825         vha = pci_get_drvdata(ha->pdev);
5826
5827         spin_lock_irqsave(&ha->hardware_lock, flags);
5828
5829         qlt_24xx_process_atio_queue(vha);
5830         qla24xx_process_response_queue(vha, rsp);
5831
5832         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5833
5834         return IRQ_HANDLED;
5835 }
5836
5837 int
5838 qlt_mem_alloc(struct qla_hw_data *ha)
5839 {
5840         if (!QLA_TGT_MODE_ENABLED())
5841                 return 0;
5842
5843         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5844             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5845         if (!ha->tgt.tgt_vp_map)
5846                 return -ENOMEM;
5847
5848         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5849             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5850             &ha->tgt.atio_dma, GFP_KERNEL);
5851         if (!ha->tgt.atio_ring) {
5852                 kfree(ha->tgt.tgt_vp_map);
5853                 return -ENOMEM;
5854         }
5855         return 0;
5856 }
5857
5858 void
5859 qlt_mem_free(struct qla_hw_data *ha)
5860 {
5861         if (!QLA_TGT_MODE_ENABLED())
5862                 return;
5863
5864         if (ha->tgt.atio_ring) {
5865                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5866                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5867                     ha->tgt.atio_dma);
5868         }
5869         kfree(ha->tgt.tgt_vp_map);
5870 }
5871
5872 /* vport_slock to be held by the caller */
5873 void
5874 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5875 {
5876         if (!QLA_TGT_MODE_ENABLED())
5877                 return;
5878
5879         switch (cmd) {
5880         case SET_VP_IDX:
5881                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5882                 break;
5883         case SET_AL_PA:
5884                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5885                 break;
5886         case RESET_VP_IDX:
5887                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5888                 break;
5889         case RESET_AL_PA:
5890                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5891                 break;
5892         }
5893 }
5894
5895 static int __init qlt_parse_ini_mode(void)
5896 {
5897         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5898                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5899         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5900                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5901         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5902                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5903         else
5904                 return false;
5905
5906         return true;
5907 }
5908
5909 int __init qlt_init(void)
5910 {
5911         int ret;
5912
5913         if (!qlt_parse_ini_mode()) {
5914                 ql_log(ql_log_fatal, NULL, 0xe06b,
5915                     "qlt_parse_ini_mode() failed\n");
5916                 return -EINVAL;
5917         }
5918
5919         if (!QLA_TGT_MODE_ENABLED())
5920                 return 0;
5921
5922         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5923             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5924             qla_tgt_mgmt_cmd), 0, NULL);
5925         if (!qla_tgt_mgmt_cmd_cachep) {
5926                 ql_log(ql_log_fatal, NULL, 0xe06d,
5927                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5928                 return -ENOMEM;
5929         }
5930
5931         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5932             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5933         if (!qla_tgt_mgmt_cmd_mempool) {
5934                 ql_log(ql_log_fatal, NULL, 0xe06e,
5935                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5936                 ret = -ENOMEM;
5937                 goto out_mgmt_cmd_cachep;
5938         }
5939
5940         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5941         if (!qla_tgt_wq) {
5942                 ql_log(ql_log_fatal, NULL, 0xe06f,
5943                     "alloc_workqueue for qla_tgt_wq failed\n");
5944                 ret = -ENOMEM;
5945                 goto out_cmd_mempool;
5946         }
5947         /*
5948          * Return 1 to signal that initiator-mode is being disabled
5949          */
5950         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5951
5952 out_cmd_mempool:
5953         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5954 out_mgmt_cmd_cachep:
5955         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5956         return ret;
5957 }
5958
5959 void qlt_exit(void)
5960 {
5961         if (!QLA_TGT_MODE_ENABLED())
5962                 return;
5963
5964         destroy_workqueue(qla_tgt_wq);
5965         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5966         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5967 }