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