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 char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  46 module_param(qlini_mode, charp, S_IRUGO);
  47 MODULE_PARM_DESC(qlini_mode,
  48         "Determines when initiator mode will be enabled. Possible values: "
  49         "\"exclusive\" - initiator mode will be enabled on load, "
  50         "disabled on enabling target mode and then on disabling target mode "
  51         "enabled back; "
  52         "\"disabled\" - initiator mode will never be enabled; "
  53         "\"enabled\" (default) - initiator mode will always stay enabled.");
  54
  55 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  56
  57 /*
  58  * From scsi/fc/fc_fcp.h
  59  */
  60 enum fcp_resp_rsp_codes {
  61         FCP_TMF_CMPL = 0,
  62         FCP_DATA_LEN_INVALID = 1,
  63         FCP_CMND_FIELDS_INVALID = 2,
  64         FCP_DATA_PARAM_MISMATCH = 3,
  65         FCP_TMF_REJECTED = 4,
  66         FCP_TMF_FAILED = 5,
  67         FCP_TMF_INVALID_LUN = 9,
  68 };
  69
  70 /*
  71  * fc_pri_ta from scsi/fc/fc_fcp.h
  72  */
  73 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  74 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  75 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  76 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  77 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  78 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  79 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  80
  81 /*
  82  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  83  * must be called under HW lock and could unlock/lock it inside.
  84  * It isn't an issue, since in the current implementation on the time when
  85  * those functions are called:
  86  *
  87  *   - Either context is IRQ and only IRQ handler can modify HW data,
  88  *     including rings related fields,
  89  *
  90  *   - Or access to target mode variables from struct qla_tgt doesn't
  91  *     cross those functions boundaries, except tgt_stop, which
  92  *     additionally protected by irq_cmd_count.
  93  */
  94 /* Predefs for callbacks handed to qla2xxx LLD */
  95 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
  96         struct atio_from_isp *pkt);
  97 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
  98 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
  99         int fn, void *iocb, int flags);
 100 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 101         *cmd, struct atio_from_isp *atio, int ha_locked);
 102 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 103         struct qla_tgt_srr_imm *imm, int ha_lock);
 104 /*
 105  * Global Variables
 106  */
 107 static struct kmem_cache *qla_tgt_cmd_cachep;
 108 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 109 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 110 static struct workqueue_struct *qla_tgt_wq;
 111 static DEFINE_MUTEX(qla_tgt_mutex);
 112 static LIST_HEAD(qla_tgt_glist);
 113
 114 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 115 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 116         struct qla_tgt *tgt,
 117         const uint8_t *port_name)
 118 {
 119         struct qla_tgt_sess *sess;
 120
 121         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 122                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 123                         return sess;
 124         }
 125
 126         return NULL;
 127 }
 128
 129 /* Might release hw lock, then reaquire!! */
 130 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 131 {
 132         /* Send marker if required */
 133         if (unlikely(vha->marker_needed != 0)) {
 134                 int rc = qla2x00_issue_marker(vha, vha_locked);
 135                 if (rc != QLA_SUCCESS) {
 136                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 137                             "qla_target(%d): issue_marker() failed\n",
 138                             vha->vp_idx);
 139                 }
 140                 return rc;
 141         }
 142         return QLA_SUCCESS;
 143 }
 144
 145 static inline
 146 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 147         uint8_t *d_id)
 148 {
 149         struct qla_hw_data *ha = vha->hw;
 150         uint8_t vp_idx;
 151
 152         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 153                 return NULL;
 154
 155         if (vha->d_id.b.al_pa == d_id[2])
 156                 return vha;
 157
 158         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 159         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 160         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 161                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 162
 163         return NULL;
 164 }
 165
 166 static inline
 167 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 168         uint16_t vp_idx)
 169 {
 170         struct qla_hw_data *ha = vha->hw;
 171
 172         if (vha->vp_idx == vp_idx)
 173                 return vha;
 174
 175         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 176         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 177                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 178
 179         return NULL;
 180 }
 181
 182 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 183         struct atio_from_isp *atio)
 184 {
 185         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 186                 "%s: qla_target(%d): type %x ox_id %04x\n",
 187                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 188                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 189
 190         switch (atio->u.raw.entry_type) {
 191         case ATIO_TYPE7:
 192         {
 193                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 194                     atio->u.isp24.fcp_hdr.d_id);
 195                 if (unlikely(NULL == host)) {
 196                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 197                             "qla_target(%d): Received ATIO_TYPE7 "
 198                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 199                             atio->u.isp24.fcp_hdr.d_id[0],
 200                             atio->u.isp24.fcp_hdr.d_id[1],
 201                             atio->u.isp24.fcp_hdr.d_id[2]);
 202                         break;
 203                 }
 204                 qlt_24xx_atio_pkt(host, atio);
 205                 break;
 206         }
 207
 208         case IMMED_NOTIFY_TYPE:
 209         {
 210                 struct scsi_qla_host *host = vha;
 211                 struct imm_ntfy_from_isp *entry =
 212                     (struct imm_ntfy_from_isp *)atio;
 213
 214                 if ((entry->u.isp24.vp_index != 0xFF) &&
 215                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 216                         host = qlt_find_host_by_vp_idx(vha,
 217                             entry->u.isp24.vp_index);
 218                         if (unlikely(!host)) {
 219                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 220                                     "qla_target(%d): Received "
 221                                     "ATIO (IMMED_NOTIFY_TYPE) "
 222                                     "with unknown vp_index %d\n",
 223                                     vha->vp_idx, entry->u.isp24.vp_index);
 224                                 break;
 225                         }
 226                 }
 227                 qlt_24xx_atio_pkt(host, atio);
 228                 break;
 229         }
 230
 231         default:
 232                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 233                     "qla_target(%d): Received unknown ATIO atio "
 234                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 235                 break;
 236         }
 237
 238         return;
 239 }
 240
 241 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 242 {
 243         switch (pkt->entry_type) {
 244         case CTIO_CRC2:
 245                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 246                         "qla_target(%d):%s: CRC2 Response pkt\n",
 247                         vha->vp_idx, __func__);
 248         case CTIO_TYPE7:
 249         {
 250                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 251                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 252                     entry->vp_index);
 253                 if (unlikely(!host)) {
 254                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 255                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 256                             "received, with unknown vp_index %d\n",
 257                             vha->vp_idx, entry->vp_index);
 258                         break;
 259                 }
 260                 qlt_response_pkt(host, pkt);
 261                 break;
 262         }
 263
 264         case IMMED_NOTIFY_TYPE:
 265         {
 266                 struct scsi_qla_host *host = vha;
 267                 struct imm_ntfy_from_isp *entry =
 268                     (struct imm_ntfy_from_isp *)pkt;
 269
 270                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 271                 if (unlikely(!host)) {
 272                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 273                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 274                             "received, with unknown vp_index %d\n",
 275                             vha->vp_idx, entry->u.isp24.vp_index);
 276                         break;
 277                 }
 278                 qlt_response_pkt(host, pkt);
 279                 break;
 280         }
 281
 282         case NOTIFY_ACK_TYPE:
 283         {
 284                 struct scsi_qla_host *host = vha;
 285                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 286
 287                 if (0xFF != entry->u.isp24.vp_index) {
 288                         host = qlt_find_host_by_vp_idx(vha,
 289                             entry->u.isp24.vp_index);
 290                         if (unlikely(!host)) {
 291                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 292                                     "qla_target(%d): Response "
 293                                     "pkt (NOTIFY_ACK_TYPE) "
 294                                     "received, with unknown "
 295                                     "vp_index %d\n", vha->vp_idx,
 296                                     entry->u.isp24.vp_index);
 297                                 break;
 298                         }
 299                 }
 300                 qlt_response_pkt(host, pkt);
 301                 break;
 302         }
 303
 304         case ABTS_RECV_24XX:
 305         {
 306                 struct abts_recv_from_24xx *entry =
 307                     (struct abts_recv_from_24xx *)pkt;
 308                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 309                     entry->vp_index);
 310                 if (unlikely(!host)) {
 311                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 312                             "qla_target(%d): Response pkt "
 313                             "(ABTS_RECV_24XX) received, with unknown "
 314                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 315                         break;
 316                 }
 317                 qlt_response_pkt(host, pkt);
 318                 break;
 319         }
 320
 321         case ABTS_RESP_24XX:
 322         {
 323                 struct abts_resp_to_24xx *entry =
 324                     (struct abts_resp_to_24xx *)pkt;
 325                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 326                     entry->vp_index);
 327                 if (unlikely(!host)) {
 328                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 329                             "qla_target(%d): Response pkt "
 330                             "(ABTS_RECV_24XX) received, with unknown "
 331                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 332                         break;
 333                 }
 334                 qlt_response_pkt(host, pkt);
 335                 break;
 336         }
 337
 338         default:
 339                 qlt_response_pkt(vha, pkt);
 340                 break;
 341         }
 342
 343 }
 344
 345 static void qlt_free_session_done(struct work_struct *work)
 346 {
 347         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 348             free_work);
 349         struct qla_tgt *tgt = sess->tgt;
 350         struct scsi_qla_host *vha = sess->vha;
 351         struct qla_hw_data *ha = vha->hw;
 352
 353         BUG_ON(!tgt);
 354         /*
 355          * Release the target session for FC Nexus from fabric module code.
 356          */
 357         if (sess->se_sess != NULL)
 358                 ha->tgt.tgt_ops->free_session(sess);
 359
 360         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 361             "Unregistration of sess %p finished\n", sess);
 362
 363         kfree(sess);
 364         /*
 365          * We need to protect against race, when tgt is freed before or
 366          * inside wake_up()
 367          */
 368         tgt->sess_count--;
 369         if (tgt->sess_count == 0)
 370                 wake_up_all(&tgt->waitQ);
 371 }
 372
 373 /* ha->hardware_lock supposed to be held on entry */
 374 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 375 {
 376         struct scsi_qla_host *vha = sess->vha;
 377
 378         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 379
 380         list_del(&sess->sess_list_entry);
 381         if (sess->deleted)
 382                 list_del(&sess->del_list_entry);
 383
 384         INIT_WORK(&sess->free_work, qlt_free_session_done);
 385         schedule_work(&sess->free_work);
 386 }
 387 EXPORT_SYMBOL(qlt_unreg_sess);
 388
 389 /* ha->hardware_lock supposed to be held on entry */
 390 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 391 {
 392         struct qla_hw_data *ha = vha->hw;
 393         struct qla_tgt_sess *sess = NULL;
 394         uint32_t unpacked_lun, lun = 0;
 395         uint16_t loop_id;
 396         int res = 0;
 397         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 398         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 399
 400         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 401         if (loop_id == 0xFFFF) {
 402 #if 0 /* FIXME: Re-enable Global event handling.. */
 403                 /* Global event */
 404                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 405                 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
 406                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 407                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 408                             typeof(*sess), sess_list_entry);
 409                         switch (mcmd) {
 410                         case QLA_TGT_NEXUS_LOSS_SESS:
 411                                 mcmd = QLA_TGT_NEXUS_LOSS;
 412                                 break;
 413                         case QLA_TGT_ABORT_ALL_SESS:
 414                                 mcmd = QLA_TGT_ABORT_ALL;
 415                                 break;
 416                         case QLA_TGT_NEXUS_LOSS:
 417                         case QLA_TGT_ABORT_ALL:
 418                                 break;
 419                         default:
 420                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 421                                     "qla_target(%d): Not allowed "
 422                                     "command %x in %s", vha->vp_idx,
 423                                     mcmd, __func__);
 424                                 sess = NULL;
 425                                 break;
 426                         }
 427                 } else
 428                         sess = NULL;
 429 #endif
 430         } else {
 431                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 432         }
 433
 434         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 435             "Using sess for qla_tgt_reset: %p\n", sess);
 436         if (!sess) {
 437                 res = -ESRCH;
 438                 return res;
 439         }
 440
 441         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 442             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 443             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 444             mcmd, loop_id);
 445
 446         lun = a->u.isp24.fcp_cmnd.lun;
 447         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 448
 449         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 450             iocb, QLA24XX_MGMT_SEND_NACK);
 451 }
 452
 453 /* ha->hardware_lock supposed to be held on entry */
 454 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 455         bool immediate)
 456 {
 457         struct qla_tgt *tgt = sess->tgt;
 458         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 459
 460         if (sess->deleted)
 461                 return;
 462
 463         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 464             "Scheduling sess %p for deletion\n", sess);
 465         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 466         sess->deleted = 1;
 467
 468         if (immediate)
 469                 dev_loss_tmo = 0;
 470
 471         sess->expires = jiffies + dev_loss_tmo * HZ;
 472
 473         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 474             "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
 475             "deletion in %u secs (expires: %lu) immed: %d\n",
 476             sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
 477             sess->expires, immediate);
 478
 479         if (immediate)
 480                 schedule_delayed_work(&tgt->sess_del_work, 0);
 481         else
 482                 schedule_delayed_work(&tgt->sess_del_work,
 483                     sess->expires - jiffies);
 484 }
 485
 486 /* ha->hardware_lock supposed to be held on entry */
 487 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
 488 {
 489         struct qla_tgt_sess *sess;
 490
 491         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 492                 qlt_schedule_sess_for_deletion(sess, true);
 493
 494         /* At this point tgt could be already dead */
 495 }
 496
 497 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 498         uint16_t *loop_id)
 499 {
 500         struct qla_hw_data *ha = vha->hw;
 501         dma_addr_t gid_list_dma;
 502         struct gid_list_info *gid_list;
 503         char *id_iter;
 504         int res, rc, i;
 505         uint16_t entries;
 506
 507         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 508             &gid_list_dma, GFP_KERNEL);
 509         if (!gid_list) {
 510                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 511                     "qla_target(%d): DMA Alloc failed of %u\n",
 512                     vha->vp_idx, qla2x00_gid_list_size(ha));
 513                 return -ENOMEM;
 514         }
 515
 516         /* Get list of logged in devices */
 517         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 518         if (rc != QLA_SUCCESS) {
 519                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 520                     "qla_target(%d): get_id_list() failed: %x\n",
 521                     vha->vp_idx, rc);
 522                 res = -1;
 523                 goto out_free_id_list;
 524         }
 525
 526         id_iter = (char *)gid_list;
 527         res = -1;
 528         for (i = 0; i < entries; i++) {
 529                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 530                 if ((gid->al_pa == s_id[2]) &&
 531                     (gid->area == s_id[1]) &&
 532                     (gid->domain == s_id[0])) {
 533                         *loop_id = le16_to_cpu(gid->loop_id);
 534                         res = 0;
 535                         break;
 536                 }
 537                 id_iter += ha->gid_list_info_size;
 538         }
 539
 540 out_free_id_list:
 541         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 542             gid_list, gid_list_dma);
 543         return res;
 544 }
 545
 546 /* ha->hardware_lock supposed to be held on entry */
 547 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 548 {
 549         BUG_ON(!sess->deleted);
 550
 551         list_del(&sess->del_list_entry);
 552         sess->deleted = 0;
 553 }
 554
 555 static void qlt_del_sess_work_fn(struct delayed_work *work)
 556 {
 557         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 558             sess_del_work);
 559         struct scsi_qla_host *vha = tgt->vha;
 560         struct qla_hw_data *ha = vha->hw;
 561         struct qla_tgt_sess *sess;
 562         unsigned long flags, elapsed;
 563
 564         spin_lock_irqsave(&ha->hardware_lock, flags);
 565         while (!list_empty(&tgt->del_sess_list)) {
 566                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 567                     del_list_entry);
 568                 elapsed = jiffies;
 569                 if (time_after_eq(elapsed, sess->expires)) {
 570                         qlt_undelete_sess(sess);
 571
 572                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 573                             "Timeout: sess %p about to be deleted\n",
 574                             sess);
 575                         ha->tgt.tgt_ops->shutdown_sess(sess);
 576                         ha->tgt.tgt_ops->put_sess(sess);
 577                 } else {
 578                         schedule_delayed_work(&tgt->sess_del_work,
 579                             sess->expires - elapsed);
 580                         break;
 581                 }
 582         }
 583         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 584 }
 585
 586 /*
 587  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 588  * Caller must put it.
 589  */
 590 static struct qla_tgt_sess *qlt_create_sess(
 591         struct scsi_qla_host *vha,
 592         fc_port_t *fcport,
 593         bool local)
 594 {
 595         struct qla_hw_data *ha = vha->hw;
 596         struct qla_tgt_sess *sess;
 597         unsigned long flags;
 598         unsigned char be_sid[3];
 599
 600         /* Check to avoid double sessions */
 601         spin_lock_irqsave(&ha->hardware_lock, flags);
 602         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 603                                 sess_list_entry) {
 604                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 605                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 606                             "Double sess %p found (s_id %x:%x:%x, "
 607                             "loop_id %d), updating to d_id %x:%x:%x, "
 608                             "loop_id %d", sess, sess->s_id.b.domain,
 609                             sess->s_id.b.al_pa, sess->s_id.b.area,
 610                             sess->loop_id, fcport->d_id.b.domain,
 611                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 612                             fcport->loop_id);
 613
 614                         if (sess->deleted)
 615                                 qlt_undelete_sess(sess);
 616
 617                         kref_get(&sess->se_sess->sess_kref);
 618                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 619                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 620
 621                         if (sess->local && !local)
 622                                 sess->local = 0;
 623                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 624
 625                         return sess;
 626                 }
 627         }
 628         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 629
 630         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 631         if (!sess) {
 632                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 633                     "qla_target(%u): session allocation failed, all commands "
 634                     "from port %8phC will be refused", vha->vp_idx,
 635                     fcport->port_name);
 636
 637                 return NULL;
 638         }
 639         sess->tgt = vha->vha_tgt.qla_tgt;
 640         sess->vha = vha;
 641         sess->s_id = fcport->d_id;
 642         sess->loop_id = fcport->loop_id;
 643         sess->local = local;
 644
 645         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 646             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 647             sess, vha->vha_tgt.qla_tgt);
 648
 649         be_sid[0] = sess->s_id.b.domain;
 650         be_sid[1] = sess->s_id.b.area;
 651         be_sid[2] = sess->s_id.b.al_pa;
 652         /*
 653          * Determine if this fc_port->port_name is allowed to access
 654          * target mode using explict NodeACLs+MappedLUNs, or using
 655          * TPG demo mode.  If this is successful a target mode FC nexus
 656          * is created.
 657          */
 658         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 659             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 660                 kfree(sess);
 661                 return NULL;
 662         }
 663         /*
 664          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 665          * access across ->hardware_lock reaquire.
 666          */
 667         kref_get(&sess->se_sess->sess_kref);
 668
 669         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 670         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 671         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 672
 673         spin_lock_irqsave(&ha->hardware_lock, flags);
 674         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 675         vha->vha_tgt.qla_tgt->sess_count++;
 676         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 677
 678         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 679             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 680             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 681             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 682             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 683             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 684
 685         return sess;
 686 }
 687
 688 /*
 689  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 690  */
 691 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 692 {
 693         struct qla_hw_data *ha = vha->hw;
 694         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 695         struct qla_tgt_sess *sess;
 696         unsigned long flags;
 697
 698         if (!vha->hw->tgt.tgt_ops)
 699                 return;
 700
 701         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 702                 return;
 703
 704         if (qla_ini_mode_enabled(vha))
 705                 return;
 706
 707         spin_lock_irqsave(&ha->hardware_lock, flags);
 708         if (tgt->tgt_stop) {
 709                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 710                 return;
 711         }
 712         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 713         if (!sess) {
 714                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 715
 716                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 717                 sess = qlt_create_sess(vha, fcport, false);
 718                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 719
 720                 spin_lock_irqsave(&ha->hardware_lock, flags);
 721         } else {
 722                 kref_get(&sess->se_sess->sess_kref);
 723
 724                 if (sess->deleted) {
 725                         qlt_undelete_sess(sess);
 726
 727                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 728                             "qla_target(%u): %ssession for port %8phC "
 729                             "(loop ID %d) reappeared\n", vha->vp_idx,
 730                             sess->local ? "local " : "", sess->port_name,
 731                             sess->loop_id);
 732
 733                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 734                             "Reappeared sess %p\n", sess);
 735                 }
 736                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 737                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 738         }
 739
 740         if (sess && sess->local) {
 741                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 742                     "qla_target(%u): local session for "
 743                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 744                     fcport->port_name, sess->loop_id);
 745                 sess->local = 0;
 746         }
 747         ha->tgt.tgt_ops->put_sess(sess);
 748         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 749 }
 750
 751 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 752 {
 753         struct qla_hw_data *ha = vha->hw;
 754         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 755         struct qla_tgt_sess *sess;
 756         unsigned long flags;
 757
 758         if (!vha->hw->tgt.tgt_ops)
 759                 return;
 760
 761         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 762                 return;
 763
 764         spin_lock_irqsave(&ha->hardware_lock, flags);
 765         if (tgt->tgt_stop) {
 766                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 767                 return;
 768         }
 769         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 770         if (!sess) {
 771                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 772                 return;
 773         }
 774
 775         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 776
 777         sess->local = 1;
 778         qlt_schedule_sess_for_deletion(sess, false);
 779         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 780 }
 781
 782 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 783 {
 784         struct qla_hw_data *ha = tgt->ha;
 785         unsigned long flags;
 786         int res;
 787         /*
 788          * We need to protect against race, when tgt is freed before or
 789          * inside wake_up()
 790          */
 791         spin_lock_irqsave(&ha->hardware_lock, flags);
 792         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 793             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 794             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 795         res = (tgt->sess_count == 0);
 796         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 797
 798         return res;
 799 }
 800
 801 /* Called by tcm_qla2xxx configfs code */
 802 int qlt_stop_phase1(struct qla_tgt *tgt)
 803 {
 804         struct scsi_qla_host *vha = tgt->vha;
 805         struct qla_hw_data *ha = tgt->ha;
 806         unsigned long flags;
 807
 808         mutex_lock(&qla_tgt_mutex);
 809         if (!vha->fc_vport) {
 810                 struct Scsi_Host *sh = vha->host;
 811                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 812                 bool npiv_vports;
 813
 814                 spin_lock_irqsave(sh->host_lock, flags);
 815                 npiv_vports = (fc_host->npiv_vports_inuse);
 816                 spin_unlock_irqrestore(sh->host_lock, flags);
 817
 818                 if (npiv_vports) {
 819                         mutex_unlock(&qla_tgt_mutex);
 820                         return -EPERM;
 821                 }
 822         }
 823         if (tgt->tgt_stop || tgt->tgt_stopped) {
 824                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 825                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 826                 mutex_unlock(&qla_tgt_mutex);
 827                 return -EPERM;
 828         }
 829
 830         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 831             vha->host_no, vha);
 832         /*
 833          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 834          * Lock is needed, because we still can get an incoming packet.
 835          */
 836         mutex_lock(&vha->vha_tgt.tgt_mutex);
 837         spin_lock_irqsave(&ha->hardware_lock, flags);
 838         tgt->tgt_stop = 1;
 839         qlt_clear_tgt_db(tgt, true);
 840         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 841         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 842         mutex_unlock(&qla_tgt_mutex);
 843
 844         flush_delayed_work(&tgt->sess_del_work);
 845
 846         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 847             "Waiting for sess works (tgt %p)", tgt);
 848         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 849         while (!list_empty(&tgt->sess_works_list)) {
 850                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 851                 flush_scheduled_work();
 852                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 853         }
 854         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 855
 856         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 857             "Waiting for tgt %p: list_empty(sess_list)=%d "
 858             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 859             tgt->sess_count);
 860
 861         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 862
 863         /* Big hammer */
 864         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 865                 qlt_disable_vha(vha);
 866
 867         /* Wait for sessions to clear out (just in case) */
 868         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 869         return 0;
 870 }
 871 EXPORT_SYMBOL(qlt_stop_phase1);
 872
 873 /* Called by tcm_qla2xxx configfs code */
 874 void qlt_stop_phase2(struct qla_tgt *tgt)
 875 {
 876         struct qla_hw_data *ha = tgt->ha;
 877         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 878         unsigned long flags;
 879
 880         if (tgt->tgt_stopped) {
 881                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
 882                     "Already in tgt->tgt_stopped state\n");
 883                 dump_stack();
 884                 return;
 885         }
 886
 887         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
 888             "Waiting for %d IRQ commands to complete (tgt %p)",
 889             tgt->irq_cmd_count, tgt);
 890
 891         mutex_lock(&vha->vha_tgt.tgt_mutex);
 892         spin_lock_irqsave(&ha->hardware_lock, flags);
 893         while (tgt->irq_cmd_count != 0) {
 894                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 895                 udelay(2);
 896                 spin_lock_irqsave(&ha->hardware_lock, flags);
 897         }
 898         tgt->tgt_stop = 0;
 899         tgt->tgt_stopped = 1;
 900         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 901         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 902
 903         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
 904             tgt);
 905 }
 906 EXPORT_SYMBOL(qlt_stop_phase2);
 907
 908 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 909 static void qlt_release(struct qla_tgt *tgt)
 910 {
 911         scsi_qla_host_t *vha = tgt->vha;
 912
 913         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 914                 qlt_stop_phase2(tgt);
 915
 916         vha->vha_tgt.qla_tgt = NULL;
 917
 918         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
 919             "Release of tgt %p finished\n", tgt);
 920
 921         kfree(tgt);
 922 }
 923
 924 /* ha->hardware_lock supposed to be held on entry */
 925 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 926         const void *param, unsigned int param_size)
 927 {
 928         struct qla_tgt_sess_work_param *prm;
 929         unsigned long flags;
 930
 931         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 932         if (!prm) {
 933                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 934                     "qla_target(%d): Unable to create session "
 935                     "work, command will be refused", 0);
 936                 return -ENOMEM;
 937         }
 938
 939         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 940             "Scheduling work (type %d, prm %p)"
 941             " to find session for param %p (size %d, tgt %p)\n",
 942             type, prm, param, param_size, tgt);
 943
 944         prm->type = type;
 945         memcpy(&prm->tm_iocb, param, param_size);
 946
 947         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 948         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 949         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 950
 951         schedule_work(&tgt->sess_work);
 952
 953         return 0;
 954 }
 955
 956 /*
 957  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 958  */
 959 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 960         struct imm_ntfy_from_isp *ntfy,
 961         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 962         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 963 {
 964         struct qla_hw_data *ha = vha->hw;
 965         request_t *pkt;
 966         struct nack_to_isp *nack;
 967
 968         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
 969
 970         /* Send marker if required */
 971         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
 972                 return;
 973
 974         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
 975         if (!pkt) {
 976                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
 977                     "qla_target(%d): %s failed: unable to allocate "
 978                     "request packet\n", vha->vp_idx, __func__);
 979                 return;
 980         }
 981
 982         if (vha->vha_tgt.qla_tgt != NULL)
 983                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
 984
 985         pkt->entry_type = NOTIFY_ACK_TYPE;
 986         pkt->entry_count = 1;
 987
 988         nack = (struct nack_to_isp *)pkt;
 989         nack->ox_id = ntfy->ox_id;
 990
 991         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
 992         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
 993                 nack->u.isp24.flags = ntfy->u.isp24.flags &
 994                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
 995         }
 996         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
 997         nack->u.isp24.status = ntfy->u.isp24.status;
 998         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
 999         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1000         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1001         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1002         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1003         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1004         nack->u.isp24.srr_reject_code = srr_reject_code;
1005         nack->u.isp24.srr_reject_code_expl = srr_explan;
1006         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1007
1008         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1009             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1010             vha->vp_idx, nack->u.isp24.status);
1011
1012         qla2x00_start_iocbs(vha, vha->req);
1013 }
1014
1015 /*
1016  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1017  */
1018 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1019         struct abts_recv_from_24xx *abts, uint32_t status,
1020         bool ids_reversed)
1021 {
1022         struct qla_hw_data *ha = vha->hw;
1023         struct abts_resp_to_24xx *resp;
1024         uint32_t f_ctl;
1025         uint8_t *p;
1026
1027         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1028             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1029             ha, abts, status);
1030
1031         /* Send marker if required */
1032         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1033                 return;
1034
1035         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1036         if (!resp) {
1037                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1038                     "qla_target(%d): %s failed: unable to allocate "
1039                     "request packet", vha->vp_idx, __func__);
1040                 return;
1041         }
1042
1043         resp->entry_type = ABTS_RESP_24XX;
1044         resp->entry_count = 1;
1045         resp->nport_handle = abts->nport_handle;
1046         resp->vp_index = vha->vp_idx;
1047         resp->sof_type = abts->sof_type;
1048         resp->exchange_address = abts->exchange_address;
1049         resp->fcp_hdr_le = abts->fcp_hdr_le;
1050         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1051             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1052             F_CTL_SEQ_INITIATIVE);
1053         p = (uint8_t *)&f_ctl;
1054         resp->fcp_hdr_le.f_ctl[0] = *p++;
1055         resp->fcp_hdr_le.f_ctl[1] = *p++;
1056         resp->fcp_hdr_le.f_ctl[2] = *p;
1057         if (ids_reversed) {
1058                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1059                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1060                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1061                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1062                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1063                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1064         } else {
1065                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1066                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1067                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1068                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1069                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1070                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1071         }
1072         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1073         if (status == FCP_TMF_CMPL) {
1074                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1075                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1076                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1077                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1078                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1079                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1080         } else {
1081                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1082                 resp->payload.ba_rjt.reason_code =
1083                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1084                 /* Other bytes are zero */
1085         }
1086
1087         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1088
1089         qla2x00_start_iocbs(vha, vha->req);
1090 }
1091
1092 /*
1093  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1094  */
1095 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1096         struct abts_resp_from_24xx_fw *entry)
1097 {
1098         struct ctio7_to_24xx *ctio;
1099
1100         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1101             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1102         /* Send marker if required */
1103         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1104                 return;
1105
1106         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1107         if (ctio == NULL) {
1108                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1109                     "qla_target(%d): %s failed: unable to allocate "
1110                     "request packet\n", vha->vp_idx, __func__);
1111                 return;
1112         }
1113
1114         /*
1115          * We've got on entrance firmware's response on by us generated
1116          * ABTS response. So, in it ID fields are reversed.
1117          */
1118
1119         ctio->entry_type = CTIO_TYPE7;
1120         ctio->entry_count = 1;
1121         ctio->nport_handle = entry->nport_handle;
1122         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1123         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1124         ctio->vp_index = vha->vp_idx;
1125         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1126         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1127         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1128         ctio->exchange_addr = entry->exchange_addr_to_abort;
1129         ctio->u.status1.flags =
1130             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1131                 CTIO7_FLAGS_TERMINATE);
1132         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1133
1134         qla2x00_start_iocbs(vha, vha->req);
1135
1136         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1137             FCP_TMF_CMPL, true);
1138 }
1139
1140 /* ha->hardware_lock supposed to be held on entry */
1141 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1142         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1143 {
1144         struct qla_hw_data *ha = vha->hw;
1145         struct se_session *se_sess = sess->se_sess;
1146         struct qla_tgt_mgmt_cmd *mcmd;
1147         struct se_cmd *se_cmd;
1148         u32 lun = 0;
1149         int rc;
1150         bool found_lun = false;
1151
1152         spin_lock(&se_sess->sess_cmd_lock);
1153         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1154                 struct qla_tgt_cmd *cmd =
1155                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1156                 if (cmd->tag == abts->exchange_addr_to_abort) {
1157                         lun = cmd->unpacked_lun;
1158                         found_lun = true;
1159                         break;
1160                 }
1161         }
1162         spin_unlock(&se_sess->sess_cmd_lock);
1163
1164         if (!found_lun)
1165                 return -ENOENT;
1166
1167         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1168             "qla_target(%d): task abort (tag=%d)\n",
1169             vha->vp_idx, abts->exchange_addr_to_abort);
1170
1171         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1172         if (mcmd == NULL) {
1173                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1174                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1175                     vha->vp_idx, __func__);
1176                 return -ENOMEM;
1177         }
1178         memset(mcmd, 0, sizeof(*mcmd));
1179
1180         mcmd->sess = sess;
1181         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1182
1183         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1184             abts->exchange_addr_to_abort);
1185         if (rc != 0) {
1186                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1187                     "qla_target(%d):  tgt_ops->handle_tmr()"
1188                     " failed: %d", vha->vp_idx, rc);
1189                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1190                 return -EFAULT;
1191         }
1192
1193         return 0;
1194 }
1195
1196 /*
1197  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1198  */
1199 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1200         struct abts_recv_from_24xx *abts)
1201 {
1202         struct qla_hw_data *ha = vha->hw;
1203         struct qla_tgt_sess *sess;
1204         uint32_t tag = abts->exchange_addr_to_abort;
1205         uint8_t s_id[3];
1206         int rc;
1207
1208         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1209                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1210                     "qla_target(%d): ABTS: Abort Sequence not "
1211                     "supported\n", vha->vp_idx);
1212                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1213                 return;
1214         }
1215
1216         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1217                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1218                     "qla_target(%d): ABTS: Unknown Exchange "
1219                     "Address received\n", vha->vp_idx);
1220                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1221                 return;
1222         }
1223
1224         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1225             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1226             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1227             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1228             le32_to_cpu(abts->fcp_hdr_le.parameter));
1229
1230         s_id[0] = abts->fcp_hdr_le.s_id[2];
1231         s_id[1] = abts->fcp_hdr_le.s_id[1];
1232         s_id[2] = abts->fcp_hdr_le.s_id[0];
1233
1234         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1235         if (!sess) {
1236                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1237                     "qla_target(%d): task abort for non-existant session\n",
1238                     vha->vp_idx);
1239                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1240                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1241                 if (rc != 0) {
1242                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1243                             false);
1244                 }
1245                 return;
1246         }
1247
1248         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1249         if (rc != 0) {
1250                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1251                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1252                     vha->vp_idx, rc);
1253                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1254                 return;
1255         }
1256 }
1257
1258 /*
1259  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1260  */
1261 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1262         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1263 {
1264         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1265         struct ctio7_to_24xx *ctio;
1266
1267         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1268             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1269             ha, atio, resp_code);
1270
1271         /* Send marker if required */
1272         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1273                 return;
1274
1275         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1276         if (ctio == NULL) {
1277                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1278                     "qla_target(%d): %s failed: unable to allocate "
1279                     "request packet\n", ha->vp_idx, __func__);
1280                 return;
1281         }
1282
1283         ctio->entry_type = CTIO_TYPE7;
1284         ctio->entry_count = 1;
1285         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1286         ctio->nport_handle = mcmd->sess->loop_id;
1287         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1288         ctio->vp_index = ha->vp_idx;
1289         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1290         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1291         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1292         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1293         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1294             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1295                 CTIO7_FLAGS_SEND_STATUS);
1296         ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1297         ctio->u.status1.scsi_status =
1298             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1299         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1300         ctio->u.status1.sense_data[0] = resp_code;
1301
1302         qla2x00_start_iocbs(ha, ha->req);
1303 }
1304
1305 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1306 {
1307         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1308 }
1309 EXPORT_SYMBOL(qlt_free_mcmd);
1310
1311 /* callback from target fabric module code */
1312 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1313 {
1314         struct scsi_qla_host *vha = mcmd->sess->vha;
1315         struct qla_hw_data *ha = vha->hw;
1316         unsigned long flags;
1317
1318         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1319             "TM response mcmd (%p) status %#x state %#x",
1320             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1321
1322         spin_lock_irqsave(&ha->hardware_lock, flags);
1323         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1324                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1325                     0, 0, 0, 0, 0, 0);
1326         else {
1327                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1328                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1329                             mcmd->fc_tm_rsp, false);
1330                 else
1331                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1332                             mcmd->fc_tm_rsp);
1333         }
1334         /*
1335          * Make the callback for ->free_mcmd() to queue_work() and invoke
1336          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1337          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1338          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1339          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1340          * qlt_xmit_tm_rsp() returns here..
1341          */
1342         ha->tgt.tgt_ops->free_mcmd(mcmd);
1343         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1344 }
1345 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1346
1347 /* No locks */
1348 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1349 {
1350         struct qla_tgt_cmd *cmd = prm->cmd;
1351
1352         BUG_ON(cmd->sg_cnt == 0);
1353
1354         prm->sg = (struct scatterlist *)cmd->sg;
1355         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1356             cmd->sg_cnt, cmd->dma_data_direction);
1357         if (unlikely(prm->seg_cnt == 0))
1358                 goto out_err;
1359
1360         prm->cmd->sg_mapped = 1;
1361
1362         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1363                 /*
1364                  * If greater than four sg entries then we need to allocate
1365                  * the continuation entries
1366                  */
1367                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1368                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1369                         prm->tgt->datasegs_per_cmd,
1370                         prm->tgt->datasegs_per_cont);
1371         } else {
1372                 /* DIF */
1373                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1374                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1375                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1376                         prm->tot_dsds = prm->seg_cnt;
1377                 } else
1378                         prm->tot_dsds = prm->seg_cnt;
1379
1380                 if (cmd->prot_sg_cnt) {
1381                         prm->prot_sg      = cmd->prot_sg;
1382                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1383                                 cmd->prot_sg, cmd->prot_sg_cnt,
1384                                 cmd->dma_data_direction);
1385                         if (unlikely(prm->prot_seg_cnt == 0))
1386                                 goto out_err;
1387
1388                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1389                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1390                                 /* Dif Bundling not support here */
1391                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1392                                                                 cmd->blk_sz);
1393                                 prm->tot_dsds += prm->prot_seg_cnt;
1394                         } else
1395                                 prm->tot_dsds += prm->prot_seg_cnt;
1396                 }
1397         }
1398
1399         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1400             prm->seg_cnt, prm->req_cnt);
1401         return 0;
1402
1403 out_err:
1404         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1405             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1406             0, prm->cmd->sg_cnt);
1407         return -1;
1408 }
1409
1410 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1411         struct qla_tgt_cmd *cmd)
1412 {
1413         struct qla_hw_data *ha = vha->hw;
1414
1415         BUG_ON(!cmd->sg_mapped);
1416         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1417         cmd->sg_mapped = 0;
1418
1419         if (cmd->prot_sg_cnt)
1420                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1421                         cmd->dma_data_direction);
1422
1423         if (cmd->ctx_dsd_alloced)
1424                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1425
1426         if (cmd->ctx)
1427                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1428 }
1429
1430 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1431         uint32_t req_cnt)
1432 {
1433         struct qla_hw_data *ha = vha->hw;
1434         device_reg_t __iomem *reg = ha->iobase;
1435         uint32_t cnt;
1436
1437         if (vha->req->cnt < (req_cnt + 2)) {
1438                 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1439
1440                 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1441                     "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1442                     "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1443                     vha->req->ring_index, vha->req->cnt, req_cnt);
1444                 if  (vha->req->ring_index < cnt)
1445                         vha->req->cnt = cnt - vha->req->ring_index;
1446                 else
1447                         vha->req->cnt = vha->req->length -
1448                             (vha->req->ring_index - cnt);
1449         }
1450
1451         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1452                 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1453                     "qla_target(%d): There is no room in the "
1454                     "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1455                     "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1456                     vha->req->cnt, req_cnt);
1457                 return -EAGAIN;
1458         }
1459         vha->req->cnt -= req_cnt;
1460
1461         return 0;
1462 }
1463
1464 /*
1465  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1466  */
1467 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1468 {
1469         /* Adjust ring index. */
1470         vha->req->ring_index++;
1471         if (vha->req->ring_index == vha->req->length) {
1472                 vha->req->ring_index = 0;
1473                 vha->req->ring_ptr = vha->req->ring;
1474         } else {
1475                 vha->req->ring_ptr++;
1476         }
1477         return (cont_entry_t *)vha->req->ring_ptr;
1478 }
1479
1480 /* ha->hardware_lock supposed to be held on entry */
1481 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1482 {
1483         struct qla_hw_data *ha = vha->hw;
1484         uint32_t h;
1485
1486         h = ha->tgt.current_handle;
1487         /* always increment cmd handle */
1488         do {
1489                 ++h;
1490                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1491                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1492                 if (h == ha->tgt.current_handle) {
1493                         ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1494                             "qla_target(%d): Ran out of "
1495                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1496                         h = QLA_TGT_NULL_HANDLE;
1497                         break;
1498                 }
1499         } while ((h == QLA_TGT_NULL_HANDLE) ||
1500             (h == QLA_TGT_SKIP_HANDLE) ||
1501             (ha->tgt.cmds[h-1] != NULL));
1502
1503         if (h != QLA_TGT_NULL_HANDLE)
1504                 ha->tgt.current_handle = h;
1505
1506         return h;
1507 }
1508
1509 /* ha->hardware_lock supposed to be held on entry */
1510 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1511         struct scsi_qla_host *vha)
1512 {
1513         uint32_t h;
1514         struct ctio7_to_24xx *pkt;
1515         struct qla_hw_data *ha = vha->hw;
1516         struct atio_from_isp *atio = &prm->cmd->atio;
1517
1518         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1519         prm->pkt = pkt;
1520         memset(pkt, 0, sizeof(*pkt));
1521
1522         pkt->entry_type = CTIO_TYPE7;
1523         pkt->entry_count = (uint8_t)prm->req_cnt;
1524         pkt->vp_index = vha->vp_idx;
1525
1526         h = qlt_make_handle(vha);
1527         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1528                 /*
1529                  * CTIO type 7 from the firmware doesn't provide a way to
1530                  * know the initiator's LOOP ID, hence we can't find
1531                  * the session and, so, the command.
1532                  */
1533                 return -EAGAIN;
1534         } else
1535                 ha->tgt.cmds[h-1] = prm->cmd;
1536
1537         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1538         pkt->nport_handle = prm->cmd->loop_id;
1539         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1540         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1541         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1542         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1543         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1544         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1545         pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1546         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1547
1548         ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1549             "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1550             vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1551             le16_to_cpu(pkt->u.status0.ox_id));
1552         return 0;
1553 }
1554
1555 /*
1556  * ha->hardware_lock supposed to be held on entry. We have already made sure
1557  * that there is sufficient amount of request entries to not drop it.
1558  */
1559 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1560         struct scsi_qla_host *vha)
1561 {
1562         int cnt;
1563         uint32_t *dword_ptr;
1564         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1565
1566         /* Build continuation packets */
1567         while (prm->seg_cnt > 0) {
1568                 cont_a64_entry_t *cont_pkt64 =
1569                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1570
1571                 /*
1572                  * Make sure that from cont_pkt64 none of
1573                  * 64-bit specific fields used for 32-bit
1574                  * addressing. Cast to (cont_entry_t *) for
1575                  * that.
1576                  */
1577
1578                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1579
1580                 cont_pkt64->entry_count = 1;
1581                 cont_pkt64->sys_define = 0;
1582
1583                 if (enable_64bit_addressing) {
1584                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1585                         dword_ptr =
1586                             (uint32_t *)&cont_pkt64->dseg_0_address;
1587                 } else {
1588                         cont_pkt64->entry_type = CONTINUE_TYPE;
1589                         dword_ptr =
1590                             (uint32_t *)&((cont_entry_t *)
1591                                 cont_pkt64)->dseg_0_address;
1592                 }
1593
1594                 /* Load continuation entry data segments */
1595                 for (cnt = 0;
1596                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1597                     cnt++, prm->seg_cnt--) {
1598                         *dword_ptr++ =
1599                             cpu_to_le32(pci_dma_lo32
1600                                 (sg_dma_address(prm->sg)));
1601                         if (enable_64bit_addressing) {
1602                                 *dword_ptr++ =
1603                                     cpu_to_le32(pci_dma_hi32
1604                                         (sg_dma_address
1605                                         (prm->sg)));
1606                         }
1607                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1608
1609                         ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1610                             "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1611                             (long long unsigned int)
1612                             pci_dma_hi32(sg_dma_address(prm->sg)),
1613                             (long long unsigned int)
1614                             pci_dma_lo32(sg_dma_address(prm->sg)),
1615                             (int)sg_dma_len(prm->sg));
1616
1617                         prm->sg = sg_next(prm->sg);
1618                 }
1619         }
1620 }
1621
1622 /*
1623  * ha->hardware_lock supposed to be held on entry. We have already made sure
1624  * that there is sufficient amount of request entries to not drop it.
1625  */
1626 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1627         struct scsi_qla_host *vha)
1628 {
1629         int cnt;
1630         uint32_t *dword_ptr;
1631         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1632         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1633
1634         ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1635             "iocb->scsi_status=%x, iocb->flags=%x\n",
1636             le16_to_cpu(pkt24->u.status0.scsi_status),
1637             le16_to_cpu(pkt24->u.status0.flags));
1638
1639         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1640
1641         /* Setup packet address segment pointer */
1642         dword_ptr = pkt24->u.status0.dseg_0_address;
1643
1644         /* Set total data segment count */
1645         if (prm->seg_cnt)
1646                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1647
1648         if (prm->seg_cnt == 0) {
1649                 /* No data transfer */
1650                 *dword_ptr++ = 0;
1651                 *dword_ptr = 0;
1652                 return;
1653         }
1654
1655         /* If scatter gather */
1656         ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1657
1658         /* Load command entry data segments */
1659         for (cnt = 0;
1660             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1661             cnt++, prm->seg_cnt--) {
1662                 *dword_ptr++ =
1663                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1664                 if (enable_64bit_addressing) {
1665                         *dword_ptr++ =
1666                             cpu_to_le32(pci_dma_hi32(
1667                                 sg_dma_address(prm->sg)));
1668                 }
1669                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1670
1671                 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1672                     "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1673                     (long long unsigned int)pci_dma_hi32(sg_dma_address(
1674                     prm->sg)),
1675                     (long long unsigned int)pci_dma_lo32(sg_dma_address(
1676                     prm->sg)),
1677                     (int)sg_dma_len(prm->sg));
1678
1679                 prm->sg = sg_next(prm->sg);
1680         }
1681
1682         qlt_load_cont_data_segments(prm, vha);
1683 }
1684
1685 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1686 {
1687         return cmd->bufflen > 0;
1688 }
1689
1690 /*
1691  * Called without ha->hardware_lock held
1692  */
1693 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1694         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1695         uint32_t *full_req_cnt)
1696 {
1697         struct qla_tgt *tgt = cmd->tgt;
1698         struct scsi_qla_host *vha = tgt->vha;
1699         struct qla_hw_data *ha = vha->hw;
1700         struct se_cmd *se_cmd = &cmd->se_cmd;
1701
1702         if (unlikely(cmd->aborted)) {
1703                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1704                     "qla_target(%d): terminating exchange "
1705                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1706                     se_cmd, cmd->tag);
1707
1708                 cmd->state = QLA_TGT_STATE_ABORTED;
1709
1710                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1711
1712                 /* !! At this point cmd could be already freed !! */
1713                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1714         }
1715
1716         ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u ox_id %04x\n",
1717                 vha->vp_idx, cmd->tag,
1718                 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
1719
1720         prm->cmd = cmd;
1721         prm->tgt = tgt;
1722         prm->rq_result = scsi_status;
1723         prm->sense_buffer = &cmd->sense_buffer[0];
1724         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1725         prm->sg = NULL;
1726         prm->seg_cnt = -1;
1727         prm->req_cnt = 1;
1728         prm->add_status_pkt = 0;
1729
1730         ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1731             prm->rq_result, xmit_type);
1732
1733         /* Send marker if required */
1734         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1735                 return -EFAULT;
1736
1737         ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1738
1739         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1740                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1741                         return -EAGAIN;
1742         }
1743
1744         *full_req_cnt = prm->req_cnt;
1745
1746         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1747                 prm->residual = se_cmd->residual_count;
1748                 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1749                     "Residual underflow: %d (tag %d, "
1750                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1751                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1752                     cmd->bufflen, prm->rq_result);
1753                 prm->rq_result |= SS_RESIDUAL_UNDER;
1754         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1755                 prm->residual = se_cmd->residual_count;
1756                 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1757                     "Residual overflow: %d (tag %d, "
1758                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1759                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1760                     cmd->bufflen, prm->rq_result);
1761                 prm->rq_result |= SS_RESIDUAL_OVER;
1762         }
1763
1764         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1765                 /*
1766                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1767                  * ignored in *xmit_response() below
1768                  */
1769                 if (qlt_has_data(cmd)) {
1770                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1771                             (IS_FWI2_CAPABLE(ha) &&
1772                             (prm->rq_result != 0))) {
1773                                 prm->add_status_pkt = 1;
1774                                 (*full_req_cnt)++;
1775                         }
1776                 }
1777         }
1778
1779         ql_dbg(ql_dbg_tgt, vha, 0xe016,
1780             "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1781             prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1782
1783         return 0;
1784 }
1785
1786 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1787         struct qla_tgt_cmd *cmd, int sending_sense)
1788 {
1789         if (ha->tgt.enable_class_2)
1790                 return 0;
1791
1792         if (sending_sense)
1793                 return cmd->conf_compl_supported;
1794         else
1795                 return ha->tgt.enable_explicit_conf &&
1796                     cmd->conf_compl_supported;
1797 }
1798
1799 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1800 /*
1801  *  Original taken from the XFS code
1802  */
1803 static unsigned long qlt_srr_random(void)
1804 {
1805         static int Inited;
1806         static unsigned long RandomValue;
1807         static DEFINE_SPINLOCK(lock);
1808         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1809         register long rv;
1810         register long lo;
1811         register long hi;
1812         unsigned long flags;
1813
1814         spin_lock_irqsave(&lock, flags);
1815         if (!Inited) {
1816                 RandomValue = jiffies;
1817                 Inited = 1;
1818         }
1819         rv = RandomValue;
1820         hi = rv / 127773;
1821         lo = rv % 127773;
1822         rv = 16807 * lo - 2836 * hi;
1823         if (rv <= 0)
1824                 rv += 2147483647;
1825         RandomValue = rv;
1826         spin_unlock_irqrestore(&lock, flags);
1827         return rv;
1828 }
1829
1830 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1831 {
1832 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1833         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1834             == 50) {
1835                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1836                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1837                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1838         }
1839 #endif
1840         /*
1841          * It's currently not possible to simulate SRRs for FCP_WRITE without
1842          * a physical link layer failure, so don't even try here..
1843          */
1844         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1845                 return;
1846
1847         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1848             ((qlt_srr_random() % 100) == 20)) {
1849                 int i, leave = 0;
1850                 unsigned int tot_len = 0;
1851
1852                 while (leave == 0)
1853                         leave = qlt_srr_random() % cmd->sg_cnt;
1854
1855                 for (i = 0; i < leave; i++)
1856                         tot_len += cmd->sg[i].length;
1857
1858                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1859                     "Cutting cmd %p (tag %d) buffer"
1860                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1861                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1862                     cmd->bufflen, cmd->sg_cnt);
1863
1864                 cmd->bufflen = tot_len;
1865                 cmd->sg_cnt = leave;
1866         }
1867
1868         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1869                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1870
1871                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1872                     "Cutting cmd %p (tag %d) buffer head "
1873                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1874                     cmd->bufflen);
1875                 if (offset == 0)
1876                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1877                 else if (qlt_set_data_offset(cmd, offset)) {
1878                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1879                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1880                 }
1881         }
1882 }
1883 #else
1884 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1885 {}
1886 #endif
1887
1888 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1889         struct qla_tgt_prm *prm)
1890 {
1891         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1892             (uint32_t)sizeof(ctio->u.status1.sense_data));
1893         ctio->u.status0.flags |=
1894             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1895         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1896                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1897                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1898                     CTIO7_FLAGS_CONFORM_REQ);
1899         }
1900         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1901         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1902         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1903                 int i;
1904
1905                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1906                         if (prm->cmd->se_cmd.scsi_status != 0) {
1907                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1908                                     "Skipping EXPLICIT_CONFORM and "
1909                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1910                                     "non GOOD status\n");
1911                                 goto skip_explict_conf;
1912                         }
1913                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1914                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1915                             CTIO7_FLAGS_CONFORM_REQ);
1916                 }
1917 skip_explict_conf:
1918                 ctio->u.status1.flags &=
1919                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1920                 ctio->u.status1.flags |=
1921                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1922                 ctio->u.status1.scsi_status |=
1923                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1924                 ctio->u.status1.sense_length =
1925                     cpu_to_le16(prm->sense_buffer_len);
1926                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1927                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1928                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1929 #if 0
1930                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1931                         static int q;
1932                         if (q < 10) {
1933                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1934                                     "qla_target(%d): %d bytes of sense "
1935                                     "lost", prm->tgt->ha->vp_idx,
1936                                     prm->sense_buffer_len % 4);
1937                                 q++;
1938                         }
1939                 }
1940 #endif
1941         } else {
1942                 ctio->u.status1.flags &=
1943                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1944                 ctio->u.status1.flags |=
1945                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1946                 ctio->u.status1.sense_length = 0;
1947                 memset(ctio->u.status1.sense_data, 0,
1948                     sizeof(ctio->u.status1.sense_data));
1949         }
1950
1951         /* Sense with len > 24, is it possible ??? */
1952 }
1953
1954
1955
1956 /* diff  */
1957 static inline int
1958 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1959 {
1960         /*
1961          * Uncomment when corresponding SCSI changes are done.
1962          *
1963          if (!sp->cmd->prot_chk)
1964          return 0;
1965          *
1966          */
1967         switch (se_cmd->prot_op) {
1968         case TARGET_PROT_DOUT_INSERT:
1969         case TARGET_PROT_DIN_STRIP:
1970                 if (ql2xenablehba_err_chk >= 1)
1971                         return 1;
1972                 break;
1973         case TARGET_PROT_DOUT_PASS:
1974         case TARGET_PROT_DIN_PASS:
1975                 if (ql2xenablehba_err_chk >= 2)
1976                         return 1;
1977                 break;
1978         case TARGET_PROT_DIN_INSERT:
1979         case TARGET_PROT_DOUT_STRIP:
1980                 return 1;
1981         default:
1982                 break;
1983         }
1984         return 0;
1985 }
1986
1987 /*
1988  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
1989  *
1990  */
1991 static inline void
1992 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
1993 {
1994         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
1995
1996         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
1997          * have been immplemented by TCM, before AppTag is avail.
1998          * Look for modesense_handlers[]
1999          */
2000         ctx->app_tag = __constant_cpu_to_le16(0);
2001         ctx->app_tag_mask[0] = 0x0;
2002         ctx->app_tag_mask[1] = 0x0;
2003
2004         switch (se_cmd->prot_type) {
2005         case TARGET_DIF_TYPE0_PROT:
2006                 /*
2007                  * No check for ql2xenablehba_err_chk, as it would be an
2008                  * I/O error if hba tag generation is not done.
2009                  */
2010                 ctx->ref_tag = cpu_to_le32(lba);
2011
2012                 if (!qlt_hba_err_chk_enabled(se_cmd))
2013                         break;
2014
2015                 /* enable ALL bytes of the ref tag */
2016                 ctx->ref_tag_mask[0] = 0xff;
2017                 ctx->ref_tag_mask[1] = 0xff;
2018                 ctx->ref_tag_mask[2] = 0xff;
2019                 ctx->ref_tag_mask[3] = 0xff;
2020                 break;
2021         /*
2022          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2023          * 16 bit app tag.
2024          */
2025         case TARGET_DIF_TYPE1_PROT:
2026                 ctx->ref_tag = cpu_to_le32(lba);
2027
2028                 if (!qlt_hba_err_chk_enabled(se_cmd))
2029                         break;
2030
2031                 /* enable ALL bytes of the ref tag */
2032                 ctx->ref_tag_mask[0] = 0xff;
2033                 ctx->ref_tag_mask[1] = 0xff;
2034                 ctx->ref_tag_mask[2] = 0xff;
2035                 ctx->ref_tag_mask[3] = 0xff;
2036                 break;
2037         /*
2038          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2039          * match LBA in CDB + N
2040          */
2041         case TARGET_DIF_TYPE2_PROT:
2042                 ctx->ref_tag = cpu_to_le32(lba);
2043
2044                 if (!qlt_hba_err_chk_enabled(se_cmd))
2045                         break;
2046
2047                 /* enable ALL bytes of the ref tag */
2048                 ctx->ref_tag_mask[0] = 0xff;
2049                 ctx->ref_tag_mask[1] = 0xff;
2050                 ctx->ref_tag_mask[2] = 0xff;
2051                 ctx->ref_tag_mask[3] = 0xff;
2052                 break;
2053
2054         /* For Type 3 protection: 16 bit GUARD only */
2055         case TARGET_DIF_TYPE3_PROT:
2056                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2057                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2058                 break;
2059         }
2060 }
2061
2062
2063 static inline int
2064 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2065 {
2066         uint32_t                *cur_dsd;
2067         int                     sgc;
2068         uint32_t                transfer_length = 0;
2069         uint32_t                data_bytes;
2070         uint32_t                dif_bytes;
2071         uint8_t                 bundling = 1;
2072         uint8_t                 *clr_ptr;
2073         struct crc_context      *crc_ctx_pkt = NULL;
2074         struct qla_hw_data      *ha;
2075         struct ctio_crc2_to_fw  *pkt;
2076         dma_addr_t              crc_ctx_dma;
2077         uint16_t                fw_prot_opts = 0;
2078         struct qla_tgt_cmd      *cmd = prm->cmd;
2079         struct se_cmd           *se_cmd = &cmd->se_cmd;
2080         uint32_t h;
2081         struct atio_from_isp *atio = &prm->cmd->atio;
2082
2083         sgc = 0;
2084         ha = vha->hw;
2085
2086         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2087         prm->pkt = pkt;
2088         memset(pkt, 0, sizeof(*pkt));
2089
2090         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2091                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2092                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2093                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2094
2095         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2096             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2097                 bundling = 0;
2098
2099         /* Compute dif len and adjust data len to incude protection */
2100         data_bytes = cmd->bufflen;
2101         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2102
2103         switch (se_cmd->prot_op) {
2104         case TARGET_PROT_DIN_INSERT:
2105         case TARGET_PROT_DOUT_STRIP:
2106                 transfer_length = data_bytes;
2107                 data_bytes += dif_bytes;
2108                 break;
2109
2110         case TARGET_PROT_DIN_STRIP:
2111         case TARGET_PROT_DOUT_INSERT:
2112         case TARGET_PROT_DIN_PASS:
2113         case TARGET_PROT_DOUT_PASS:
2114                 transfer_length = data_bytes + dif_bytes;
2115                 break;
2116
2117         default:
2118                 BUG();
2119                 break;
2120         }
2121
2122         if (!qlt_hba_err_chk_enabled(se_cmd))
2123                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2124         /* HBA error checking enabled */
2125         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2126                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2127                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2128                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2129                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2130                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2131         }
2132
2133         switch (se_cmd->prot_op) {
2134         case TARGET_PROT_DIN_INSERT:
2135         case TARGET_PROT_DOUT_INSERT:
2136                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2137                 break;
2138         case TARGET_PROT_DIN_STRIP:
2139         case TARGET_PROT_DOUT_STRIP:
2140                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2141                 break;
2142         case TARGET_PROT_DIN_PASS:
2143         case TARGET_PROT_DOUT_PASS:
2144                 fw_prot_opts |= PO_MODE_DIF_PASS;
2145                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2146                 break;
2147         default:/* Normal Request */
2148                 fw_prot_opts |= PO_MODE_DIF_PASS;
2149                 break;
2150         }
2151
2152
2153         /* ---- PKT ---- */
2154         /* Update entry type to indicate Command Type CRC_2 IOCB */
2155         pkt->entry_type  = CTIO_CRC2;
2156         pkt->entry_count = 1;
2157         pkt->vp_index = vha->vp_idx;
2158
2159         h = qlt_make_handle(vha);
2160         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2161                 /*
2162                  * CTIO type 7 from the firmware doesn't provide a way to
2163                  * know the initiator's LOOP ID, hence we can't find
2164                  * the session and, so, the command.
2165                  */
2166                 return -EAGAIN;
2167         } else
2168                 ha->tgt.cmds[h-1] = prm->cmd;
2169
2170
2171         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2172         pkt->nport_handle = prm->cmd->loop_id;
2173         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2174         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2175         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2176         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2177         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2178         pkt->ox_id  = swab16(atio->u.isp24.fcp_hdr.ox_id);
2179         pkt->flags |= (atio->u.isp24.attr << 9);
2180         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2181
2182         /* Set transfer direction */
2183         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2184                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2185         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2186                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2187
2188
2189         pkt->dseg_count = prm->tot_dsds;
2190         /* Fibre channel byte count */
2191         pkt->transfer_length = cpu_to_le32(transfer_length);
2192
2193
2194         /* ----- CRC context -------- */
2195
2196         /* Allocate CRC context from global pool */
2197         crc_ctx_pkt = cmd->ctx =
2198             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2199
2200         if (!crc_ctx_pkt)
2201                 goto crc_queuing_error;
2202
2203         /* Zero out CTX area. */
2204         clr_ptr = (uint8_t *)crc_ctx_pkt;
2205         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2206
2207         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2208         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2209
2210         /* Set handle */
2211         crc_ctx_pkt->handle = pkt->handle;
2212
2213         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2214
2215         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2216         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2217         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2218
2219
2220         if (!bundling) {
2221                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2222         } else {
2223                 /*
2224                  * Configure Bundling if we need to fetch interlaving
2225                  * protection PCI accesses
2226                  */
2227                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2228                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2229                 crc_ctx_pkt->u.bundling.dseg_count =
2230                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2231                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2232         }
2233
2234         /* Finish the common fields of CRC pkt */
2235         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2236         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2237         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2238         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2239
2240
2241         /* Walks data segments */
2242         pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2243
2244         if (!bundling && prm->prot_seg_cnt) {
2245                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2246                         prm->tot_dsds, cmd))
2247                         goto crc_queuing_error;
2248         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2249                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2250                 goto crc_queuing_error;
2251
2252         if (bundling && prm->prot_seg_cnt) {
2253                 /* Walks dif segments */
2254                 pkt->add_flags |=
2255                         __constant_cpu_to_le16(CTIO_CRC2_AF_DIF_DSD_ENA);
2256
2257                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2258                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2259                         prm->prot_seg_cnt, cmd))
2260                         goto crc_queuing_error;
2261         }
2262         return QLA_SUCCESS;
2263
2264 crc_queuing_error:
2265         /* Cleanup will be performed by the caller */
2266
2267         return QLA_FUNCTION_FAILED;
2268 }
2269
2270
2271 /*
2272  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2273  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2274  */
2275 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2276         uint8_t scsi_status)
2277 {
2278         struct scsi_qla_host *vha = cmd->vha;
2279         struct qla_hw_data *ha = vha->hw;
2280         struct ctio7_to_24xx *pkt;
2281         struct qla_tgt_prm prm;
2282         uint32_t full_req_cnt = 0;
2283         unsigned long flags = 0;
2284         int res;
2285
2286         memset(&prm, 0, sizeof(prm));
2287         qlt_check_srr_debug(cmd, &xmit_type);
2288
2289         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2290             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2291             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2292             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2293             &cmd->se_cmd);
2294
2295         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2296             &full_req_cnt);
2297         if (unlikely(res != 0)) {
2298                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2299                         return 0;
2300
2301                 return res;
2302         }
2303
2304         spin_lock_irqsave(&ha->hardware_lock, flags);
2305
2306         /* Does F/W have an IOCBs for this request */
2307         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2308         if (unlikely(res))
2309                 goto out_unmap_unlock;
2310
2311         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2312                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2313         else
2314                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2315         if (unlikely(res != 0))
2316                 goto out_unmap_unlock;
2317
2318
2319         pkt = (struct ctio7_to_24xx *)prm.pkt;
2320
2321         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2322                 pkt->u.status0.flags |=
2323                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2324                         CTIO7_FLAGS_STATUS_MODE_0);
2325
2326                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2327                         qlt_load_data_segments(&prm, vha);
2328
2329                 if (prm.add_status_pkt == 0) {
2330                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2331                                 pkt->u.status0.scsi_status =
2332                                     cpu_to_le16(prm.rq_result);
2333                                 pkt->u.status0.residual =
2334                                     cpu_to_le32(prm.residual);
2335                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2336                                     CTIO7_FLAGS_SEND_STATUS);
2337                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2338                                         pkt->u.status0.flags |=
2339                                             __constant_cpu_to_le16(
2340                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2341                                                 CTIO7_FLAGS_CONFORM_REQ);
2342                                 }
2343                         }
2344
2345                 } else {
2346                         /*
2347                          * We have already made sure that there is sufficient
2348                          * amount of request entries to not drop HW lock in
2349                          * req_pkt().
2350                          */
2351                         struct ctio7_to_24xx *ctio =
2352                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2353
2354                         ql_dbg(ql_dbg_tgt, vha, 0xe019,
2355                             "Building additional status packet\n");
2356
2357                         /*
2358                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2359                          * ctio7_to_24xx
2360                          */
2361                         memcpy(ctio, pkt, sizeof(*ctio));
2362                         /* reset back to CTIO7 */
2363                         ctio->entry_count = 1;
2364                         ctio->entry_type = CTIO_TYPE7;
2365                         ctio->dseg_count = 0;
2366                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2367                             CTIO7_FLAGS_DATA_IN);
2368
2369                         /* Real finish is ctio_m1's finish */
2370                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2371                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2372                             CTIO7_FLAGS_DONT_RET_CTIO);
2373
2374                         /* qlt_24xx_init_ctio_to_isp will correct
2375                          * all neccessary fields that's part of CTIO7.
2376                          * There should be no residual of CTIO-CRC2 data.
2377                          */
2378                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2379                             &prm);
2380                         pr_debug("Status CTIO7: %p\n", ctio);
2381                 }
2382         } else
2383                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2384
2385
2386         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2387
2388         ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2389             "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2390             pkt, scsi_status);
2391
2392         qla2x00_start_iocbs(vha, vha->req);
2393         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2394
2395         return 0;
2396
2397 out_unmap_unlock:
2398         if (cmd->sg_mapped)
2399                 qlt_unmap_sg(vha, cmd);
2400         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2401
2402         return res;
2403 }
2404 EXPORT_SYMBOL(qlt_xmit_response);
2405
2406 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2407 {
2408         struct ctio7_to_24xx *pkt;
2409         struct scsi_qla_host *vha = cmd->vha;
2410         struct qla_hw_data *ha = vha->hw;
2411         struct qla_tgt *tgt = cmd->tgt;
2412         struct qla_tgt_prm prm;
2413         unsigned long flags;
2414         int res = 0;
2415
2416         memset(&prm, 0, sizeof(prm));
2417         prm.cmd = cmd;
2418         prm.tgt = tgt;
2419         prm.sg = NULL;
2420         prm.req_cnt = 1;
2421
2422         /* Send marker if required */
2423         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2424                 return -EIO;
2425
2426         ql_dbg(ql_dbg_tgt, vha, 0xe01b,
2427                 "%s: CTIO_start: vha(%d) se_cmd %p ox_id %04x\n",
2428                 __func__, (int)vha->vp_idx, &cmd->se_cmd,
2429                 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2430
2431         /* Calculate number of entries and segments required */
2432         if (qlt_pci_map_calc_cnt(&prm) != 0)
2433                 return -EAGAIN;
2434
2435         spin_lock_irqsave(&ha->hardware_lock, flags);
2436
2437         /* Does F/W have an IOCBs for this request */
2438         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2439         if (res != 0)
2440                 goto out_unlock_free_unmap;
2441         if (cmd->se_cmd.prot_op)
2442                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2443         else
2444                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2445
2446         if (unlikely(res != 0))
2447                 goto out_unlock_free_unmap;
2448         pkt = (struct ctio7_to_24xx *)prm.pkt;
2449         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2450             CTIO7_FLAGS_STATUS_MODE_0);
2451
2452         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2453                 qlt_load_data_segments(&prm, vha);
2454
2455         cmd->state = QLA_TGT_STATE_NEED_DATA;
2456
2457         qla2x00_start_iocbs(vha, vha->req);
2458         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2459
2460         return res;
2461
2462 out_unlock_free_unmap:
2463         if (cmd->sg_mapped)
2464                 qlt_unmap_sg(vha, cmd);
2465         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2466
2467         return res;
2468 }
2469 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2470
2471
2472 /*
2473  * Checks the guard or meta-data for the type of error
2474  * detected by the HBA.
2475  */
2476 static inline int
2477 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2478                 struct ctio_crc_from_fw *sts)
2479 {
2480         uint8_t         *ap = &sts->actual_dif[0];
2481         uint8_t         *ep = &sts->expected_dif[0];
2482         uint32_t        e_ref_tag, a_ref_tag;
2483         uint16_t        e_app_tag, a_app_tag;
2484         uint16_t        e_guard, a_guard;
2485         uint64_t        lba = cmd->se_cmd.t_task_lba;
2486
2487         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2488         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2489         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2490
2491         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2492         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2493         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2494
2495         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2496             "iocb(s) %p Returned STATUS.\n", sts);
2497
2498         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2499             "dif check TGT cdb 0x%x lba 0x%llu: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2500             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2501             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2502
2503         /*
2504          * Ignore sector if:
2505          * For type     3: ref & app tag is all 'f's
2506          * For type 0,1,2: app tag is all 'f's
2507          */
2508         if ((a_app_tag == 0xffff) &&
2509             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2510              (a_ref_tag == 0xffffffff))) {
2511                 uint32_t blocks_done;
2512
2513                 /* 2TB boundary case covered automatically with this */
2514                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2515                 cmd->se_cmd.bad_sector = e_ref_tag;
2516                 cmd->se_cmd.pi_err = 0;
2517                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2518                         "need to return scsi good\n");
2519
2520                 /* Update protection tag */
2521                 if (cmd->prot_sg_cnt) {
2522                         uint32_t i, j = 0, k = 0, num_ent;
2523                         struct scatterlist *sg, *sgl;
2524
2525
2526                         sgl = cmd->prot_sg;
2527
2528                         /* Patch the corresponding protection tags */
2529                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2530                                 num_ent = sg_dma_len(sg) / 8;
2531                                 if (k + num_ent < blocks_done) {
2532                                         k += num_ent;
2533                                         continue;
2534                                 }
2535                                 j = blocks_done - k - 1;
2536                                 k = blocks_done;
2537                                 break;
2538                         }
2539
2540                         if (k != blocks_done) {
2541                                 ql_log(ql_log_warn, vha, 0xf076,
2542                                     "unexpected tag values tag:lba=%u:%llu)\n",
2543                                     e_ref_tag, (unsigned long long)lba);
2544                                 goto out;
2545                         }
2546
2547 #if 0
2548                         struct sd_dif_tuple *spt;
2549                         /* TODO:
2550                          * This section came from initiator. Is it valid here?
2551                          * should ulp be override with actual val???
2552                          */
2553                         spt = page_address(sg_page(sg)) + sg->offset;
2554                         spt += j;
2555
2556                         spt->app_tag = 0xffff;
2557                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2558                                 spt->ref_tag = 0xffffffff;
2559 #endif
2560                 }
2561
2562                 return 0;
2563         }
2564
2565         /* check guard */
2566         if (e_guard != a_guard) {
2567                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2568                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2569
2570                 ql_log(ql_log_warn, vha, 0xe076,
2571                     "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",
2572                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2573                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2574                     a_guard, e_guard, cmd);
2575                 goto out;
2576         }
2577
2578         /* check ref tag */
2579         if (e_ref_tag != a_ref_tag) {
2580                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2581                 cmd->se_cmd.bad_sector = e_ref_tag;
2582
2583                 ql_log(ql_log_warn, vha, 0xe077,
2584                         "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",
2585                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2586                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2587                         a_guard, e_guard, cmd);
2588                 goto out;
2589         }
2590
2591         /* check appl tag */
2592         if (e_app_tag != a_app_tag) {
2593                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2594                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2595
2596                 ql_log(ql_log_warn, vha, 0xe078,
2597                         "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",
2598                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2599                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2600                         a_guard, e_guard, cmd);
2601                 goto out;
2602         }
2603 out:
2604         return 1;
2605 }
2606
2607
2608 /* If hardware_lock held on entry, might drop it, then reaquire */
2609 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2610 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2611         struct qla_tgt_cmd *cmd,
2612         struct atio_from_isp *atio)
2613 {
2614         struct ctio7_to_24xx *ctio24;
2615         struct qla_hw_data *ha = vha->hw;
2616         request_t *pkt;
2617         int ret = 0;
2618
2619         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2620
2621         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2622         if (pkt == NULL) {
2623                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2624                     "qla_target(%d): %s failed: unable to allocate "
2625                     "request packet\n", vha->vp_idx, __func__);
2626                 return -ENOMEM;
2627         }
2628
2629         if (cmd != NULL) {
2630                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2631                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2632                             "qla_target(%d): Terminating cmd %p with "
2633                             "incorrect state %d\n", vha->vp_idx, cmd,
2634                             cmd->state);
2635                 } else
2636                         ret = 1;
2637         }
2638
2639         pkt->entry_count = 1;
2640         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2641
2642         ctio24 = (struct ctio7_to_24xx *)pkt;
2643         ctio24->entry_type = CTIO_TYPE7;
2644         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2645         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2646         ctio24->vp_index = vha->vp_idx;
2647         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2648         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2649         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2650         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2651         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2652             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2653                 CTIO7_FLAGS_TERMINATE);
2654         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2655
2656         /* Most likely, it isn't needed */
2657         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2658             &atio->u.isp24.fcp_cmnd.add_cdb[
2659             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2660         if (ctio24->u.status1.residual != 0)
2661                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2662
2663         qla2x00_start_iocbs(vha, vha->req);
2664         return ret;
2665 }
2666
2667 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2668         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2669 {
2670         unsigned long flags;
2671         int rc;
2672
2673         if (qlt_issue_marker(vha, ha_locked) < 0)
2674                 return;
2675
2676         if (ha_locked) {
2677                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2678                 goto done;
2679         }
2680         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2681         rc = __qlt_send_term_exchange(vha, cmd, atio);
2682         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2683 done:
2684         /*
2685          * Terminate exchange will tell fw to release any active CTIO
2686          * that's in FW posession and cleanup the exchange.
2687          *
2688          * "cmd->state == QLA_TGT_STATE_ABORTED" means CTIO is still
2689          * down at FW.  Free the cmd later when CTIO comes back later
2690          * w/aborted(0x2) status.
2691          *
2692          * "cmd->state != QLA_TGT_STATE_ABORTED" means CTIO is already
2693          * back w/some err.  Free the cmd now.
2694          */
2695         if ((rc == 1) && (cmd->state != QLA_TGT_STATE_ABORTED)) {
2696                 if (!ha_locked && !in_interrupt())
2697                         msleep(250); /* just in case */
2698
2699                 if (cmd->sg_mapped)
2700                         qlt_unmap_sg(vha, cmd);
2701                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2702         }
2703         return;
2704 }
2705
2706 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2707 {
2708         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2709             "%s: se_cmd[%p] ox_id %04x\n",
2710             __func__, &cmd->se_cmd,
2711             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2712
2713         BUG_ON(cmd->sg_mapped);
2714         if (unlikely(cmd->free_sg))
2715                 kfree(cmd->sg);
2716         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2717 }
2718 EXPORT_SYMBOL(qlt_free_cmd);
2719
2720 /* ha->hardware_lock supposed to be held on entry */
2721 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2722         struct qla_tgt_cmd *cmd, void *ctio)
2723 {
2724         struct qla_tgt_srr_ctio *sc;
2725         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2726         struct qla_tgt_srr_imm *imm;
2727
2728         tgt->ctio_srr_id++;
2729
2730         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2731             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2732
2733         if (!ctio) {
2734                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2735                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2736                     vha->vp_idx);
2737                 return -EINVAL;
2738         }
2739
2740         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2741         if (sc != NULL) {
2742                 sc->cmd = cmd;
2743                 /* IRQ is already OFF */
2744                 spin_lock(&tgt->srr_lock);
2745                 sc->srr_id = tgt->ctio_srr_id;
2746                 list_add_tail(&sc->srr_list_entry,
2747                     &tgt->srr_ctio_list);
2748                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2749                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2750                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2751                         int found = 0;
2752                         list_for_each_entry(imm, &tgt->srr_imm_list,
2753                             srr_list_entry) {
2754                                 if (imm->srr_id == sc->srr_id) {
2755                                         found = 1;
2756                                         break;
2757                                 }
2758                         }
2759                         if (found) {
2760                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2761                                     "Scheduling srr work\n");
2762                                 schedule_work(&tgt->srr_work);
2763                         } else {
2764                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2765                                     "qla_target(%d): imm_srr_id "
2766                                     "== ctio_srr_id (%d), but there is no "
2767                                     "corresponding SRR IMM, deleting CTIO "
2768                                     "SRR %p\n", vha->vp_idx,
2769                                     tgt->ctio_srr_id, sc);
2770                                 list_del(&sc->srr_list_entry);
2771                                 spin_unlock(&tgt->srr_lock);
2772
2773                                 kfree(sc);
2774                                 return -EINVAL;
2775                         }
2776                 }
2777                 spin_unlock(&tgt->srr_lock);
2778         } else {
2779                 struct qla_tgt_srr_imm *ti;
2780
2781                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2782                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2783                     vha->vp_idx);
2784                 spin_lock(&tgt->srr_lock);
2785                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2786                     srr_list_entry) {
2787                         if (imm->srr_id == tgt->ctio_srr_id) {
2788                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2789                                     "IMM SRR %p deleted (id %d)\n",
2790                                     imm, imm->srr_id);
2791                                 list_del(&imm->srr_list_entry);
2792                                 qlt_reject_free_srr_imm(vha, imm, 1);
2793                         }
2794                 }
2795                 spin_unlock(&tgt->srr_lock);
2796
2797                 return -ENOMEM;
2798         }
2799
2800         return 0;
2801 }
2802
2803 /*
2804  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2805  */
2806 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2807         struct qla_tgt_cmd *cmd, uint32_t status)
2808 {
2809         int term = 0;
2810
2811         if (ctio != NULL) {
2812                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2813                 term = !(c->flags &
2814                     __constant_cpu_to_le16(OF_TERM_EXCH));
2815         } else
2816                 term = 1;
2817
2818         if (term)
2819                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2820
2821         return term;
2822 }
2823
2824 /* ha->hardware_lock supposed to be held on entry */
2825 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2826         uint32_t handle)
2827 {
2828         struct qla_hw_data *ha = vha->hw;
2829
2830         handle--;
2831         if (ha->tgt.cmds[handle] != NULL) {
2832                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2833                 ha->tgt.cmds[handle] = NULL;
2834                 return cmd;
2835         } else
2836                 return NULL;
2837 }
2838
2839 /* ha->hardware_lock supposed to be held on entry */
2840 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2841         uint32_t handle, void *ctio)
2842 {
2843         struct qla_tgt_cmd *cmd = NULL;
2844
2845         /* Clear out internal marks */
2846         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2847             CTIO_INTERMEDIATE_HANDLE_MARK);
2848
2849         if (handle != QLA_TGT_NULL_HANDLE) {
2850                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2851                         ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2852                             "SKIP_HANDLE CTIO\n");
2853                         return NULL;
2854                 }
2855                 /* handle-1 is actually used */
2856                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2857                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2858                             "qla_target(%d): Wrong handle %x received\n",
2859                             vha->vp_idx, handle);
2860                         return NULL;
2861                 }
2862                 cmd = qlt_get_cmd(vha, handle);
2863                 if (unlikely(cmd == NULL)) {
2864                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2865                             "qla_target(%d): Suspicious: unable to "
2866                             "find the command with handle %x\n", vha->vp_idx,
2867                             handle);
2868                         return NULL;
2869                 }
2870         } else if (ctio != NULL) {
2871                 /* We can't get loop ID from CTIO7 */
2872                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2873                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2874                     "support NULL handles\n", vha->vp_idx);
2875                 return NULL;
2876         }
2877
2878         return cmd;
2879 }
2880
2881 /*
2882  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2883  */
2884 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2885         uint32_t status, void *ctio)
2886 {
2887         struct qla_hw_data *ha = vha->hw;
2888         struct se_cmd *se_cmd;
2889         struct target_core_fabric_ops *tfo;
2890         struct qla_tgt_cmd *cmd;
2891
2892         ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2893             "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2894             vha->vp_idx, ctio, status, handle);
2895
2896         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2897                 /* That could happen only in case of an error/reset/abort */
2898                 if (status != CTIO_SUCCESS) {
2899                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2900                             "Intermediate CTIO received"
2901                             " (status %x)\n", status);
2902                 }
2903                 return;
2904         }
2905
2906         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2907         if (cmd == NULL)
2908                 return;
2909
2910         se_cmd = &cmd->se_cmd;
2911         tfo = se_cmd->se_tfo;
2912
2913         if (cmd->sg_mapped)
2914                 qlt_unmap_sg(vha, cmd);
2915
2916         if (unlikely(status != CTIO_SUCCESS)) {
2917                 switch (status & 0xFFFF) {
2918                 case CTIO_LIP_RESET:
2919                 case CTIO_TARGET_RESET:
2920                 case CTIO_ABORTED:
2921                         /* driver request abort via Terminate exchange */
2922                 case CTIO_TIMEOUT:
2923                 case CTIO_INVALID_RX_ID:
2924                         /* They are OK */
2925                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2926                             "qla_target(%d): CTIO with "
2927                             "status %#x received, state %x, se_cmd %p, "
2928                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2929                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2930                             status, cmd->state, se_cmd);
2931                         break;
2932
2933                 case CTIO_PORT_LOGGED_OUT:
2934                 case CTIO_PORT_UNAVAILABLE:
2935                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2936                             "qla_target(%d): CTIO with PORT LOGGED "
2937                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
2938                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
2939                             status, cmd->state, se_cmd);
2940                         break;
2941
2942                 case CTIO_SRR_RECEIVED:
2943                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2944                             "qla_target(%d): CTIO with SRR_RECEIVED"
2945                             " status %x received (state %x, se_cmd %p)\n",
2946                             vha->vp_idx, status, cmd->state, se_cmd);
2947                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2948                                 break;
2949                         else
2950                                 return;
2951
2952                 case CTIO_DIF_ERROR: {
2953                         struct ctio_crc_from_fw *crc =
2954                                 (struct ctio_crc_from_fw *)ctio;
2955                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
2956                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
2957                             vha->vp_idx, status, cmd->state, se_cmd,
2958                             *((u64 *)&crc->actual_dif[0]),
2959                             *((u64 *)&crc->expected_dif[0]));
2960
2961                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
2962                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2963                                         /* scsi Write/xfer rdy complete */
2964                                         goto skip_term;
2965                                 } else {
2966                                         /* scsi read/xmit respond complete
2967                                          * call handle dif to send scsi status
2968                                          * rather than terminate exchange.
2969                                          */
2970                                         cmd->state = QLA_TGT_STATE_PROCESSED;
2971                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
2972                                         return;
2973                                 }
2974                         } else {
2975                                 /* Need to generate a SCSI good completion.
2976                                  * because FW did not send scsi status.
2977                                  */
2978                                 status = 0;
2979                                 goto skip_term;
2980                         }
2981                         break;
2982                 }
2983                 default:
2984                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2985                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
2986                             vha->vp_idx, status, cmd->state, se_cmd);
2987                         break;
2988                 }
2989
2990
2991                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
2992                  * cmd is already aborted/terminated, we don't
2993                  * need to terminate again.  The exchange is already
2994                  * cleaned up/freed at FW level.  Just cleanup at driver
2995                  * level.
2996                  */
2997                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
2998                         (cmd->state != QLA_TGT_STATE_ABORTED)) {
2999                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3000                                 return;
3001                 }
3002         }
3003 skip_term:
3004
3005         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3006                 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
3007         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3008                 int rx_status = 0;
3009
3010                 cmd->state = QLA_TGT_STATE_DATA_IN;
3011
3012                 if (unlikely(status != CTIO_SUCCESS))
3013                         rx_status = -EIO;
3014                 else
3015                         cmd->write_data_transferred = 1;
3016
3017                 ql_dbg(ql_dbg_tgt, vha, 0xe020,
3018                     "Data received, context %x, rx_status %d\n",
3019                     0x0, rx_status);
3020
3021                 ha->tgt.tgt_ops->handle_data(cmd);
3022                 return;
3023         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3024                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3025                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
3026         } else {
3027                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3028                     "qla_target(%d): A command in state (%d) should "
3029                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3030         }
3031
3032         if (unlikely(status != CTIO_SUCCESS) &&
3033                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3034                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3035                 dump_stack();
3036         }
3037
3038         ha->tgt.tgt_ops->free_cmd(cmd);
3039 }
3040
3041 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3042         uint8_t task_codes)
3043 {
3044         int fcp_task_attr;
3045
3046         switch (task_codes) {
3047         case ATIO_SIMPLE_QUEUE:
3048                 fcp_task_attr = MSG_SIMPLE_TAG;
3049                 break;
3050         case ATIO_HEAD_OF_QUEUE:
3051                 fcp_task_attr = MSG_HEAD_TAG;
3052                 break;
3053         case ATIO_ORDERED_QUEUE:
3054                 fcp_task_attr = MSG_ORDERED_TAG;
3055                 break;
3056         case ATIO_ACA_QUEUE:
3057                 fcp_task_attr = MSG_ACA_TAG;
3058                 break;
3059         case ATIO_UNTAGGED:
3060                 fcp_task_attr = MSG_SIMPLE_TAG;
3061                 break;
3062         default:
3063                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3064                     "qla_target: unknown task code %x, use ORDERED instead\n",
3065                     task_codes);
3066                 fcp_task_attr = MSG_ORDERED_TAG;
3067                 break;
3068         }
3069
3070         return fcp_task_attr;
3071 }
3072
3073 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3074                                         uint8_t *);
3075 /*
3076  * Process context for I/O path into tcm_qla2xxx code
3077  */
3078 static void qlt_do_work(struct work_struct *work)
3079 {
3080         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3081         scsi_qla_host_t *vha = cmd->vha;
3082         struct qla_hw_data *ha = vha->hw;
3083         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3084         struct qla_tgt_sess *sess = NULL;
3085         struct atio_from_isp *atio = &cmd->atio;
3086         unsigned char *cdb;
3087         unsigned long flags;
3088         uint32_t data_length;
3089         int ret, fcp_task_attr, data_dir, bidi = 0;
3090
3091         if (tgt->tgt_stop)
3092                 goto out_term;
3093
3094         spin_lock_irqsave(&ha->hardware_lock, flags);
3095         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3096             atio->u.isp24.fcp_hdr.s_id);
3097         /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
3098         if (sess)
3099                 kref_get(&sess->se_sess->sess_kref);
3100         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3101
3102         if (unlikely(!sess)) {
3103                 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
3104
3105                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3106                         "qla_target(%d): Unable to find wwn login"
3107                         " (s_id %x:%x:%x), trying to create it manually\n",
3108                         vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3109
3110                 if (atio->u.raw.entry_count > 1) {
3111                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3112                                 "Dropping multy entry cmd %p\n", cmd);
3113                         goto out_term;
3114                 }
3115
3116                 mutex_lock(&vha->vha_tgt.tgt_mutex);
3117                 sess = qlt_make_local_sess(vha, s_id);
3118                 /* sess has an extra creation ref. */
3119                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
3120
3121                 if (!sess)
3122                         goto out_term;
3123         }
3124
3125         cmd->sess = sess;
3126         cmd->loop_id = sess->loop_id;
3127         cmd->conf_compl_supported = sess->conf_compl_supported;
3128
3129         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3130         cmd->tag = atio->u.isp24.exchange_addr;
3131         cmd->unpacked_lun = scsilun_to_int(
3132             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3133
3134         if (atio->u.isp24.fcp_cmnd.rddata &&
3135             atio->u.isp24.fcp_cmnd.wrdata) {
3136                 bidi = 1;
3137                 data_dir = DMA_TO_DEVICE;
3138         } else if (atio->u.isp24.fcp_cmnd.rddata)
3139                 data_dir = DMA_FROM_DEVICE;
3140         else if (atio->u.isp24.fcp_cmnd.wrdata)
3141                 data_dir = DMA_TO_DEVICE;
3142         else
3143                 data_dir = DMA_NONE;
3144
3145         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3146             atio->u.isp24.fcp_cmnd.task_attr);
3147         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3148             &atio->u.isp24.fcp_cmnd.add_cdb[
3149             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3150
3151         ql_dbg(ql_dbg_tgt, vha, 0xe022,
3152                 "qla_target: START qla cmd: %p se_cmd %p lun: 0x%04x (tag %d) len(%d) ox_id %x\n",
3153                 cmd, &cmd->se_cmd, cmd->unpacked_lun, cmd->tag, data_length,
3154                 cmd->atio.u.isp24.fcp_hdr.ox_id);
3155
3156         ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3157             fcp_task_attr, data_dir, bidi);
3158         if (ret != 0)
3159                 goto out_term;
3160         /*
3161          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3162          */
3163         spin_lock_irqsave(&ha->hardware_lock, flags);
3164         ha->tgt.tgt_ops->put_sess(sess);
3165         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3166         return;
3167
3168 out_term:
3169         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
3170         /*
3171          * cmd has not sent to target yet, so pass NULL as the second
3172          * argument to qlt_send_term_exchange() and free the memory here.
3173          */
3174         spin_lock_irqsave(&ha->hardware_lock, flags);
3175         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3176         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
3177         if (sess)
3178                 ha->tgt.tgt_ops->put_sess(sess);
3179         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3180 }
3181
3182 /* ha->hardware_lock supposed to be held on entry */
3183 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3184         struct atio_from_isp *atio)
3185 {
3186         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3187         struct qla_tgt_cmd *cmd;
3188
3189         if (unlikely(tgt->tgt_stop)) {
3190                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
3191                     "New command while device %p is shutting down\n", tgt);
3192                 return -EFAULT;
3193         }
3194
3195         cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
3196         if (!cmd) {
3197                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
3198                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3199                 return -ENOMEM;
3200         }
3201
3202         memcpy(&cmd->atio, atio, sizeof(*atio));
3203         cmd->state = QLA_TGT_STATE_NEW;
3204         cmd->tgt = vha->vha_tgt.qla_tgt;
3205         cmd->vha = vha;
3206
3207         INIT_WORK(&cmd->work, qlt_do_work);
3208         queue_work(qla_tgt_wq, &cmd->work);
3209         return 0;
3210
3211 }
3212
3213 /* ha->hardware_lock supposed to be held on entry */
3214 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3215         int fn, void *iocb, int flags)
3216 {
3217         struct scsi_qla_host *vha = sess->vha;
3218         struct qla_hw_data *ha = vha->hw;
3219         struct qla_tgt_mgmt_cmd *mcmd;
3220         int res;
3221         uint8_t tmr_func;
3222
3223         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3224         if (!mcmd) {
3225                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3226                     "qla_target(%d): Allocation of management "
3227                     "command failed, some commands and their data could "
3228                     "leak\n", vha->vp_idx);
3229                 return -ENOMEM;
3230         }
3231         memset(mcmd, 0, sizeof(*mcmd));
3232         mcmd->sess = sess;
3233
3234         if (iocb) {
3235                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3236                     sizeof(mcmd->orig_iocb.imm_ntfy));
3237         }
3238         mcmd->tmr_func = fn;
3239         mcmd->flags = flags;
3240
3241         switch (fn) {
3242         case QLA_TGT_CLEAR_ACA:
3243                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3244                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3245                 tmr_func = TMR_CLEAR_ACA;
3246                 break;
3247
3248         case QLA_TGT_TARGET_RESET:
3249                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3250                     "qla_target(%d): TARGET_RESET received\n",
3251                     sess->vha->vp_idx);
3252                 tmr_func = TMR_TARGET_WARM_RESET;
3253                 break;
3254
3255         case QLA_TGT_LUN_RESET:
3256                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3257                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3258                 tmr_func = TMR_LUN_RESET;
3259                 break;
3260
3261         case QLA_TGT_CLEAR_TS:
3262                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3263                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3264                 tmr_func = TMR_CLEAR_TASK_SET;
3265                 break;
3266
3267         case QLA_TGT_ABORT_TS:
3268                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3269                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3270                 tmr_func = TMR_ABORT_TASK_SET;
3271                 break;
3272 #if 0
3273         case QLA_TGT_ABORT_ALL:
3274                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3275                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3276                     sess->vha->vp_idx);
3277                 tmr_func = 0;
3278                 break;
3279
3280         case QLA_TGT_ABORT_ALL_SESS:
3281                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3282                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3283                     sess->vha->vp_idx);
3284                 tmr_func = 0;
3285                 break;
3286
3287         case QLA_TGT_NEXUS_LOSS_SESS:
3288                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3289                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3290                     sess->vha->vp_idx);
3291                 tmr_func = 0;
3292                 break;
3293
3294         case QLA_TGT_NEXUS_LOSS:
3295                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3296                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3297                 tmr_func = 0;
3298                 break;
3299 #endif
3300         default:
3301                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3302                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3303                     sess->vha->vp_idx, fn);
3304                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3305                 return -ENOSYS;
3306         }
3307
3308         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3309         if (res != 0) {
3310                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3311                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3312                     sess->vha->vp_idx, res);
3313                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3314                 return -EFAULT;
3315         }
3316
3317         return 0;
3318 }
3319
3320 /* ha->hardware_lock supposed to be held on entry */
3321 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3322 {
3323         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3324         struct qla_hw_data *ha = vha->hw;
3325         struct qla_tgt *tgt;
3326         struct qla_tgt_sess *sess;
3327         uint32_t lun, unpacked_lun;
3328         int lun_size, fn;
3329
3330         tgt = vha->vha_tgt.qla_tgt;
3331
3332         lun = a->u.isp24.fcp_cmnd.lun;
3333         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3334         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3335         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3336             a->u.isp24.fcp_hdr.s_id);
3337         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3338
3339         if (!sess) {
3340                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3341                     "qla_target(%d): task mgmt fn 0x%x for "
3342                     "non-existant session\n", vha->vp_idx, fn);
3343                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3344                     sizeof(struct atio_from_isp));
3345         }
3346
3347         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3348 }
3349
3350 /* ha->hardware_lock supposed to be held on entry */
3351 static int __qlt_abort_task(struct scsi_qla_host *vha,
3352         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3353 {
3354         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3355         struct qla_hw_data *ha = vha->hw;
3356         struct qla_tgt_mgmt_cmd *mcmd;
3357         uint32_t lun, unpacked_lun;
3358         int rc;
3359
3360         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3361         if (mcmd == NULL) {
3362                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3363                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3364                     vha->vp_idx, __func__);
3365                 return -ENOMEM;
3366         }
3367         memset(mcmd, 0, sizeof(*mcmd));
3368
3369         mcmd->sess = sess;
3370         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3371             sizeof(mcmd->orig_iocb.imm_ntfy));
3372
3373         lun = a->u.isp24.fcp_cmnd.lun;
3374         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3375
3376         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3377             le16_to_cpu(iocb->u.isp2x.seq_id));
3378         if (rc != 0) {
3379                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3380                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3381                     vha->vp_idx, rc);
3382                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3383                 return -EFAULT;
3384         }
3385
3386         return 0;
3387 }
3388
3389 /* ha->hardware_lock supposed to be held on entry */
3390 static int qlt_abort_task(struct scsi_qla_host *vha,
3391         struct imm_ntfy_from_isp *iocb)
3392 {
3393         struct qla_hw_data *ha = vha->hw;
3394         struct qla_tgt_sess *sess;
3395         int loop_id;
3396
3397         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3398
3399         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3400         if (sess == NULL) {
3401                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3402                     "qla_target(%d): task abort for unexisting "
3403                     "session\n", vha->vp_idx);
3404                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3405                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3406         }
3407
3408         return __qlt_abort_task(vha, iocb, sess);
3409 }
3410
3411 /*
3412  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3413  */
3414 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3415         struct imm_ntfy_from_isp *iocb)
3416 {
3417         int res = 0;
3418
3419         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3420             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3421             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3422
3423         switch (iocb->u.isp24.status_subcode) {
3424         case ELS_PLOGI:
3425         case ELS_FLOGI:
3426         case ELS_PRLI:
3427         case ELS_LOGO:
3428         case ELS_PRLO:
3429                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3430                 break;
3431         case ELS_PDISC:
3432         case ELS_ADISC:
3433         {
3434                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3435                 if (tgt->link_reinit_iocb_pending) {
3436                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3437                             0, 0, 0, 0, 0, 0);
3438                         tgt->link_reinit_iocb_pending = 0;
3439                 }
3440                 res = 1; /* send notify ack */
3441                 break;
3442         }
3443
3444         default:
3445                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3446                     "qla_target(%d): Unsupported ELS command %x "
3447                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3448                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3449                 break;
3450         }
3451
3452         return res;
3453 }
3454
3455 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3456 {
3457         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3458         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3459         int i, sg_srr_cnt, bufflen = 0;
3460
3461         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3462             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3463             "cmd->sg_cnt: %u, direction: %d\n",
3464             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3465
3466         /*
3467          * FIXME: Reject non zero SRR relative offset until we can test
3468          * this code properly.
3469          */
3470         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3471         return -1;
3472
3473         if (!cmd->sg || !cmd->sg_cnt) {
3474                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3475                     "Missing cmd->sg or zero cmd->sg_cnt in"
3476                     " qla_tgt_set_data_offset\n");
3477                 return -EINVAL;
3478         }
3479         /*
3480          * Walk the current cmd->sg list until we locate the new sg_srr_start
3481          */
3482         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3483                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3484                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3485                     i, sg, sg_page(sg), sg->length, sg->offset);
3486
3487                 if ((sg->length + tmp) > offset) {
3488                         first_offset = rem_offset;
3489                         sg_srr_start = sg;
3490                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3491                             "Found matching sg[%d], using %p as sg_srr_start, "
3492                             "and using first_offset: %zu\n", i, sg,
3493                             first_offset);
3494                         break;
3495                 }
3496                 tmp += sg->length;
3497                 rem_offset -= sg->length;
3498         }
3499
3500         if (!sg_srr_start) {
3501                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3502                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3503                 return -EINVAL;
3504         }
3505         sg_srr_cnt = (cmd->sg_cnt - i);
3506
3507         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3508         if (!sg_srr) {
3509                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3510                     "Unable to allocate sgp\n");
3511                 return -ENOMEM;
3512         }
3513         sg_init_table(sg_srr, sg_srr_cnt);
3514         sgp = &sg_srr[0];
3515         /*
3516          * Walk the remaining list for sg_srr_start, mapping to the newly
3517          * allocated sg_srr taking first_offset into account.
3518          */
3519         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3520                 if (first_offset) {
3521                         sg_set_page(sgp, sg_page(sg),
3522                             (sg->length - first_offset), first_offset);
3523                         first_offset = 0;
3524                 } else {
3525                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3526                 }
3527                 bufflen += sgp->length;
3528
3529                 sgp = sg_next(sgp);
3530                 if (!sgp)
3531                         break;
3532         }
3533
3534         cmd->sg = sg_srr;
3535         cmd->sg_cnt = sg_srr_cnt;
3536         cmd->bufflen = bufflen;
3537         cmd->offset += offset;
3538         cmd->free_sg = 1;
3539
3540         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3541         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3542             cmd->sg_cnt);
3543         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3544             cmd->bufflen);
3545         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3546             cmd->offset);
3547
3548         if (cmd->sg_cnt < 0)
3549                 BUG();
3550
3551         if (cmd->bufflen < 0)
3552                 BUG();
3553
3554         return 0;
3555 }
3556
3557 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3558         uint32_t srr_rel_offs, int *xmit_type)
3559 {
3560         int res = 0, rel_offs;
3561
3562         rel_offs = srr_rel_offs - cmd->offset;
3563         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3564             srr_rel_offs, rel_offs);
3565
3566         *xmit_type = QLA_TGT_XMIT_ALL;
3567
3568         if (rel_offs < 0) {
3569                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3570                     "qla_target(%d): SRR rel_offs (%d) < 0",
3571                     cmd->vha->vp_idx, rel_offs);
3572                 res = -1;
3573         } else if (rel_offs == cmd->bufflen)
3574                 *xmit_type = QLA_TGT_XMIT_STATUS;
3575         else if (rel_offs > 0)
3576                 res = qlt_set_data_offset(cmd, rel_offs);
3577
3578         return res;
3579 }
3580
3581 /* No locks, thread context */
3582 static void qlt_handle_srr(struct scsi_qla_host *vha,
3583         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3584 {
3585         struct imm_ntfy_from_isp *ntfy =
3586             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3587         struct qla_hw_data *ha = vha->hw;
3588         struct qla_tgt_cmd *cmd = sctio->cmd;
3589         struct se_cmd *se_cmd = &cmd->se_cmd;
3590         unsigned long flags;
3591         int xmit_type = 0, resp = 0;
3592         uint32_t offset;
3593         uint16_t srr_ui;
3594
3595         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3596         srr_ui = ntfy->u.isp24.srr_ui;
3597
3598         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3599             cmd, srr_ui);
3600
3601         switch (srr_ui) {
3602         case SRR_IU_STATUS:
3603                 spin_lock_irqsave(&ha->hardware_lock, flags);
3604                 qlt_send_notify_ack(vha, ntfy,
3605                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3606                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3607                 xmit_type = QLA_TGT_XMIT_STATUS;
3608                 resp = 1;
3609                 break;
3610         case SRR_IU_DATA_IN:
3611                 if (!cmd->sg || !cmd->sg_cnt) {
3612                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3613                             "Unable to process SRR_IU_DATA_IN due to"
3614                             " missing cmd->sg, state: %d\n", cmd->state);
3615                         dump_stack();
3616                         goto out_reject;
3617                 }
3618                 if (se_cmd->scsi_status != 0) {
3619                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3620                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3621                             "scsi_status\n");
3622                         goto out_reject;
3623                 }
3624                 cmd->bufflen = se_cmd->data_length;
3625
3626                 if (qlt_has_data(cmd)) {
3627                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3628                                 goto out_reject;
3629                         spin_lock_irqsave(&ha->hardware_lock, flags);
3630                         qlt_send_notify_ack(vha, ntfy,
3631                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3632                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3633                         resp = 1;
3634                 } else {
3635                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3636                             "qla_target(%d): SRR for in data for cmd "
3637                             "without them (tag %d, SCSI status %d), "
3638                             "reject", vha->vp_idx, cmd->tag,
3639                             cmd->se_cmd.scsi_status);
3640                         goto out_reject;
3641                 }
3642                 break;
3643         case SRR_IU_DATA_OUT:
3644                 if (!cmd->sg || !cmd->sg_cnt) {
3645                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3646                             "Unable to process SRR_IU_DATA_OUT due to"
3647                             " missing cmd->sg\n");
3648                         dump_stack();
3649                         goto out_reject;
3650                 }
3651                 if (se_cmd->scsi_status != 0) {
3652                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3653                             "Rejecting SRR_IU_DATA_OUT"
3654                             " with non GOOD scsi_status\n");
3655                         goto out_reject;
3656                 }
3657                 cmd->bufflen = se_cmd->data_length;
3658
3659                 if (qlt_has_data(cmd)) {
3660                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3661                                 goto out_reject;
3662                         spin_lock_irqsave(&ha->hardware_lock, flags);
3663                         qlt_send_notify_ack(vha, ntfy,
3664                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3665                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3666                         if (xmit_type & QLA_TGT_XMIT_DATA)
3667                                 qlt_rdy_to_xfer(cmd);
3668                 } else {
3669                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3670                             "qla_target(%d): SRR for out data for cmd "
3671                             "without them (tag %d, SCSI status %d), "
3672                             "reject", vha->vp_idx, cmd->tag,
3673                             cmd->se_cmd.scsi_status);
3674                         goto out_reject;
3675                 }
3676                 break;
3677         default:
3678                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3679                     "qla_target(%d): Unknown srr_ui value %x",
3680                     vha->vp_idx, srr_ui);
3681                 goto out_reject;
3682         }
3683
3684         /* Transmit response in case of status and data-in cases */
3685         if (resp)
3686                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3687
3688         return;
3689
3690 out_reject:
3691         spin_lock_irqsave(&ha->hardware_lock, flags);
3692         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3693             NOTIFY_ACK_SRR_FLAGS_REJECT,
3694             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3695             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3696         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3697                 cmd->state = QLA_TGT_STATE_DATA_IN;
3698                 dump_stack();
3699         } else
3700                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3701         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3702 }
3703
3704 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3705         struct qla_tgt_srr_imm *imm, int ha_locked)
3706 {
3707         struct qla_hw_data *ha = vha->hw;
3708         unsigned long flags = 0;
3709
3710         if (!ha_locked)
3711                 spin_lock_irqsave(&ha->hardware_lock, flags);
3712
3713         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3714             NOTIFY_ACK_SRR_FLAGS_REJECT,
3715             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3716             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3717
3718         if (!ha_locked)
3719                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3720
3721         kfree(imm);
3722 }
3723
3724 static void qlt_handle_srr_work(struct work_struct *work)
3725 {
3726         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3727         struct scsi_qla_host *vha = tgt->vha;
3728         struct qla_tgt_srr_ctio *sctio;
3729         unsigned long flags;
3730
3731         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3732             tgt);
3733
3734 restart:
3735         spin_lock_irqsave(&tgt->srr_lock, flags);
3736         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3737                 struct qla_tgt_srr_imm *imm, *i, *ti;
3738                 struct qla_tgt_cmd *cmd;
3739                 struct se_cmd *se_cmd;
3740
3741                 imm = NULL;
3742                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3743                                                 srr_list_entry) {
3744                         if (i->srr_id == sctio->srr_id) {
3745                                 list_del(&i->srr_list_entry);
3746                                 if (imm) {
3747                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3748                                           "qla_target(%d): There must be "
3749                                           "only one IMM SRR per CTIO SRR "
3750                                           "(IMM SRR %p, id %d, CTIO %p\n",
3751                                           vha->vp_idx, i, i->srr_id, sctio);
3752                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
3753                                 } else
3754                                         imm = i;
3755                         }
3756                 }
3757
3758                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3759                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3760                     sctio->srr_id);
3761
3762                 if (imm == NULL) {
3763                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3764                             "Not found matching IMM for SRR CTIO (id %d)\n",
3765                             sctio->srr_id);
3766                         continue;
3767                 } else
3768                         list_del(&sctio->srr_list_entry);
3769
3770                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3771
3772                 cmd = sctio->cmd;
3773                 /*
3774                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3775                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3776                  * logic..
3777                  */
3778                 cmd->offset = 0;
3779                 if (cmd->free_sg) {
3780                         kfree(cmd->sg);
3781                         cmd->sg = NULL;
3782                         cmd->free_sg = 0;
3783                 }
3784                 se_cmd = &cmd->se_cmd;
3785
3786                 cmd->sg_cnt = se_cmd->t_data_nents;
3787                 cmd->sg = se_cmd->t_data_sg;
3788
3789                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3790                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3791                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3792                     se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
3793                     cmd->sg_cnt, cmd->offset);
3794
3795                 qlt_handle_srr(vha, sctio, imm);
3796
3797                 kfree(imm);
3798                 kfree(sctio);
3799                 goto restart;
3800         }
3801         spin_unlock_irqrestore(&tgt->srr_lock, flags);
3802 }
3803
3804 /* ha->hardware_lock supposed to be held on entry */
3805 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3806         struct imm_ntfy_from_isp *iocb)
3807 {
3808         struct qla_tgt_srr_imm *imm;
3809         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3810         struct qla_tgt_srr_ctio *sctio;
3811
3812         tgt->imm_srr_id++;
3813
3814         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3815             vha->vp_idx);
3816
3817         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3818         if (imm != NULL) {
3819                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3820
3821                 /* IRQ is already OFF */
3822                 spin_lock(&tgt->srr_lock);
3823                 imm->srr_id = tgt->imm_srr_id;
3824                 list_add_tail(&imm->srr_list_entry,
3825                     &tgt->srr_imm_list);
3826                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3827                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
3828                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
3829                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3830                         int found = 0;
3831                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
3832                             srr_list_entry) {
3833                                 if (sctio->srr_id == imm->srr_id) {
3834                                         found = 1;
3835                                         break;
3836                                 }
3837                         }
3838                         if (found) {
3839                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3840                                     "Scheduling srr work\n");
3841                                 schedule_work(&tgt->srr_work);
3842                         } else {
3843                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3844                                     "qla_target(%d): imm_srr_id "
3845                                     "== ctio_srr_id (%d), but there is no "
3846                                     "corresponding SRR CTIO, deleting IMM "
3847                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3848                                     imm);
3849                                 list_del(&imm->srr_list_entry);
3850
3851                                 kfree(imm);
3852
3853                                 spin_unlock(&tgt->srr_lock);
3854                                 goto out_reject;
3855                         }
3856                 }
3857                 spin_unlock(&tgt->srr_lock);
3858         } else {
3859                 struct qla_tgt_srr_ctio *ts;
3860
3861                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3862                     "qla_target(%d): Unable to allocate SRR IMM "
3863                     "entry, SRR request will be rejected\n", vha->vp_idx);
3864
3865                 /* IRQ is already OFF */
3866                 spin_lock(&tgt->srr_lock);
3867                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3868                     srr_list_entry) {
3869                         if (sctio->srr_id == tgt->imm_srr_id) {
3870                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3871                                     "CTIO SRR %p deleted (id %d)\n",
3872                                     sctio, sctio->srr_id);
3873                                 list_del(&sctio->srr_list_entry);
3874                                 qlt_send_term_exchange(vha, sctio->cmd,
3875                                     &sctio->cmd->atio, 1);
3876                                 kfree(sctio);
3877                         }
3878                 }
3879                 spin_unlock(&tgt->srr_lock);
3880                 goto out_reject;
3881         }
3882
3883         return;
3884
3885 out_reject:
3886         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3887             NOTIFY_ACK_SRR_FLAGS_REJECT,
3888             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3889             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3890 }
3891
3892 /*
3893  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3894  */
3895 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3896         struct imm_ntfy_from_isp *iocb)
3897 {
3898         struct qla_hw_data *ha = vha->hw;
3899         uint32_t add_flags = 0;
3900         int send_notify_ack = 1;
3901         uint16_t status;
3902
3903         status = le16_to_cpu(iocb->u.isp2x.status);
3904         switch (status) {
3905         case IMM_NTFY_LIP_RESET:
3906         {
3907                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3908                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3909                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3910                     iocb->u.isp24.status_subcode);
3911
3912                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3913                         send_notify_ack = 0;
3914                 break;
3915         }
3916
3917         case IMM_NTFY_LIP_LINK_REINIT:
3918         {
3919                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3920                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3921                     "qla_target(%d): LINK REINIT (loop %#x, "
3922                     "subcode %x)\n", vha->vp_idx,
3923                     le16_to_cpu(iocb->u.isp24.nport_handle),
3924                     iocb->u.isp24.status_subcode);
3925                 if (tgt->link_reinit_iocb_pending) {
3926                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3927                             0, 0, 0, 0, 0, 0);
3928                 }
3929                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3930                 tgt->link_reinit_iocb_pending = 1;
3931                 /*
3932                  * QLogic requires to wait after LINK REINIT for possible
3933                  * PDISC or ADISC ELS commands
3934                  */
3935                 send_notify_ack = 0;
3936                 break;
3937         }
3938
3939         case IMM_NTFY_PORT_LOGOUT:
3940                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3941                     "qla_target(%d): Port logout (loop "
3942                     "%#x, subcode %x)\n", vha->vp_idx,
3943                     le16_to_cpu(iocb->u.isp24.nport_handle),
3944                     iocb->u.isp24.status_subcode);
3945
3946                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3947                         send_notify_ack = 0;
3948                 /* The sessions will be cleared in the callback, if needed */
3949                 break;
3950
3951         case IMM_NTFY_GLBL_TPRLO:
3952                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3953                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3954                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3955                         send_notify_ack = 0;
3956                 /* The sessions will be cleared in the callback, if needed */
3957                 break;
3958
3959         case IMM_NTFY_PORT_CONFIG:
3960                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3961                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3962                     status);
3963                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3964                         send_notify_ack = 0;
3965                 /* The sessions will be cleared in the callback, if needed */
3966                 break;
3967
3968         case IMM_NTFY_GLBL_LOGO:
3969                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3970                     "qla_target(%d): Link failure detected\n",
3971                     vha->vp_idx);
3972                 /* I_T nexus loss */
3973                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3974                         send_notify_ack = 0;
3975                 break;
3976
3977         case IMM_NTFY_IOCB_OVERFLOW:
3978                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3979                     "qla_target(%d): Cannot provide requested "
3980                     "capability (IOCB overflowed the immediate notify "
3981                     "resource count)\n", vha->vp_idx);
3982                 break;
3983
3984         case IMM_NTFY_ABORT_TASK:
3985                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3986                     "qla_target(%d): Abort Task (S %08x I %#x -> "
3987                     "L %#x)\n", vha->vp_idx,
3988                     le16_to_cpu(iocb->u.isp2x.seq_id),
3989                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3990                     le16_to_cpu(iocb->u.isp2x.lun));
3991                 if (qlt_abort_task(vha, iocb) == 0)
3992                         send_notify_ack = 0;
3993                 break;
3994
3995         case IMM_NTFY_RESOURCE:
3996                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3997                     "qla_target(%d): Out of resources, host %ld\n",
3998                     vha->vp_idx, vha->host_no);
3999                 break;
4000
4001         case IMM_NTFY_MSG_RX:
4002                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4003                     "qla_target(%d): Immediate notify task %x\n",
4004                     vha->vp_idx, iocb->u.isp2x.task_flags);
4005                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4006                         send_notify_ack = 0;
4007                 break;
4008
4009         case IMM_NTFY_ELS:
4010                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4011                         send_notify_ack = 0;
4012                 break;
4013
4014         case IMM_NTFY_SRR:
4015                 qlt_prepare_srr_imm(vha, iocb);
4016                 send_notify_ack = 0;
4017                 break;
4018
4019         default:
4020                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4021                     "qla_target(%d): Received unknown immediate "
4022                     "notify status %x\n", vha->vp_idx, status);
4023                 break;
4024         }
4025
4026         if (send_notify_ack)
4027                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4028 }
4029
4030 /*
4031  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4032  * This function sends busy to ISP 2xxx or 24xx.
4033  */
4034 static void qlt_send_busy(struct scsi_qla_host *vha,
4035         struct atio_from_isp *atio, uint16_t status)
4036 {
4037         struct ctio7_to_24xx *ctio24;
4038         struct qla_hw_data *ha = vha->hw;
4039         request_t *pkt;
4040         struct qla_tgt_sess *sess = NULL;
4041
4042         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4043             atio->u.isp24.fcp_hdr.s_id);
4044         if (!sess) {
4045                 qlt_send_term_exchange(vha, NULL, atio, 1);
4046                 return;
4047         }
4048         /* Sending marker isn't necessary, since we called from ISR */
4049
4050         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4051         if (!pkt) {
4052                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
4053                     "qla_target(%d): %s failed: unable to allocate "
4054                     "request packet", vha->vp_idx, __func__);
4055                 return;
4056         }
4057
4058         pkt->entry_count = 1;
4059         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4060
4061         ctio24 = (struct ctio7_to_24xx *)pkt;
4062         ctio24->entry_type = CTIO_TYPE7;
4063         ctio24->nport_handle = sess->loop_id;
4064         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4065         ctio24->vp_index = vha->vp_idx;
4066         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4067         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4068         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4069         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4070         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4071             __constant_cpu_to_le16(
4072                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4073                 CTIO7_FLAGS_DONT_RET_CTIO);
4074         /*
4075          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4076          * if the explicit conformation is used.
4077          */
4078         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4079         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4080         ctio24->u.status1.residual = get_unaligned((uint32_t *)
4081             &atio->u.isp24.fcp_cmnd.add_cdb[
4082             atio->u.isp24.fcp_cmnd.add_cdb_len]);
4083         if (ctio24->u.status1.residual != 0)
4084                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
4085
4086         qla2x00_start_iocbs(vha, vha->req);
4087 }
4088
4089 /* ha->hardware_lock supposed to be held on entry */
4090 /* called via callback from qla2xxx */
4091 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4092         struct atio_from_isp *atio)
4093 {
4094         struct qla_hw_data *ha = vha->hw;
4095         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4096         int rc;
4097
4098         if (unlikely(tgt == NULL)) {
4099                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
4100                     "ATIO pkt, but no tgt (ha %p)", ha);
4101                 return;
4102         }
4103         ql_dbg(ql_dbg_tgt, vha, 0xe02c,
4104             "qla_target(%d): ATIO pkt %p: type %02x count %02x",
4105             vha->vp_idx, atio, atio->u.raw.entry_type,
4106             atio->u.raw.entry_count);
4107         /*
4108          * In tgt_stop mode we also should allow all requests to pass.
4109          * Otherwise, some commands can stuck.
4110          */
4111
4112         tgt->irq_cmd_count++;
4113
4114         switch (atio->u.raw.entry_type) {
4115         case ATIO_TYPE7:
4116                 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
4117                     "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, cdb %x, add_cdb_len %x, data_length %04x, s_id %02x%02x%02x\n",
4118                     vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
4119                     atio->u.isp24.fcp_cmnd.rddata,
4120                     atio->u.isp24.fcp_cmnd.wrdata,
4121                     atio->u.isp24.fcp_cmnd.cdb[0],
4122                     atio->u.isp24.fcp_cmnd.add_cdb_len,
4123                     be32_to_cpu(get_unaligned((uint32_t *)
4124                         &atio->u.isp24.fcp_cmnd.add_cdb[
4125                         atio->u.isp24.fcp_cmnd.add_cdb_len])),
4126                     atio->u.isp24.fcp_hdr.s_id[0],
4127                     atio->u.isp24.fcp_hdr.s_id[1],
4128                     atio->u.isp24.fcp_hdr.s_id[2]);
4129
4130                 if (unlikely(atio->u.isp24.exchange_addr ==
4131                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4132                         ql_dbg(ql_dbg_tgt, vha, 0xe058,
4133                             "qla_target(%d): ATIO_TYPE7 "
4134                             "received with UNKNOWN exchange address, "
4135                             "sending QUEUE_FULL\n", vha->vp_idx);
4136                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4137                         break;
4138                 }
4139                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
4140                         rc = qlt_handle_cmd_for_atio(vha, atio);
4141                 else
4142                         rc = qlt_handle_task_mgmt(vha, atio);
4143                 if (unlikely(rc != 0)) {
4144                         if (rc == -ESRCH) {
4145 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4146                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4147 #else
4148                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4149 #endif
4150                         } else {
4151                                 if (tgt->tgt_stop) {
4152                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
4153                                             "qla_target: Unable to send "
4154                                             "command to target for req, "
4155                                             "ignoring.\n");
4156                                 } else {
4157                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4158                                             "qla_target(%d): Unable to send "
4159                                             "command to target, sending BUSY "
4160                                             "status.\n", vha->vp_idx);
4161                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4162                                 }
4163                         }
4164                 }
4165                 break;
4166
4167         case IMMED_NOTIFY_TYPE:
4168         {
4169                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4170                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4171                             "qla_target(%d): Received ATIO packet %x "
4172                             "with error status %x\n", vha->vp_idx,
4173                             atio->u.raw.entry_type,
4174                             atio->u.isp2x.entry_status);
4175                         break;
4176                 }
4177                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4178                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4179                 break;
4180         }
4181
4182         default:
4183                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4184                     "qla_target(%d): Received unknown ATIO atio "
4185                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4186                 break;
4187         }
4188
4189         tgt->irq_cmd_count--;
4190 }
4191
4192 /* ha->hardware_lock supposed to be held on entry */
4193 /* called via callback from qla2xxx */
4194 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4195 {
4196         struct qla_hw_data *ha = vha->hw;
4197         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4198
4199         if (unlikely(tgt == NULL)) {
4200                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4201                     "qla_target(%d): Response pkt %x received, but no "
4202                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4203                 return;
4204         }
4205
4206         ql_dbg(ql_dbg_tgt, vha, 0xe02f,
4207             "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
4208             "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
4209             pkt->entry_count, pkt->entry_status, pkt->handle);
4210
4211         /*
4212          * In tgt_stop mode we also should allow all requests to pass.
4213          * Otherwise, some commands can stuck.
4214          */
4215
4216         tgt->irq_cmd_count++;
4217
4218         switch (pkt->entry_type) {
4219         case CTIO_CRC2:
4220         case CTIO_TYPE7:
4221         {
4222                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4223                 ql_dbg(ql_dbg_tgt, vha, 0xe030,
4224                         "CTIO[0x%x] 12/CTIO7 7A/CRC2: instance %d\n",
4225                         entry->entry_type, vha->vp_idx);
4226                 qlt_do_ctio_completion(vha, entry->handle,
4227                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4228                     entry);
4229                 break;
4230         }
4231
4232         case ACCEPT_TGT_IO_TYPE:
4233         {
4234                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4235                 int rc;
4236                 ql_dbg(ql_dbg_tgt, vha, 0xe031,
4237                     "ACCEPT_TGT_IO instance %d status %04x "
4238                     "lun %04x read/write %d data_length %04x "
4239                     "target_id %02x rx_id %04x\n ", vha->vp_idx,
4240                     le16_to_cpu(atio->u.isp2x.status),
4241                     le16_to_cpu(atio->u.isp2x.lun),
4242                     atio->u.isp2x.execution_codes,
4243                     le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
4244                     atio), atio->u.isp2x.rx_id);
4245                 if (atio->u.isp2x.status !=
4246                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4247                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4248                             "qla_target(%d): ATIO with error "
4249                             "status %x received\n", vha->vp_idx,
4250                             le16_to_cpu(atio->u.isp2x.status));
4251                         break;
4252                 }
4253                 ql_dbg(ql_dbg_tgt, vha, 0xe032,
4254                     "FCP CDB: 0x%02x, sizeof(cdb): %lu",
4255                     atio->u.isp2x.cdb[0], (unsigned long
4256                     int)sizeof(atio->u.isp2x.cdb));
4257
4258                 rc = qlt_handle_cmd_for_atio(vha, atio);
4259                 if (unlikely(rc != 0)) {
4260                         if (rc == -ESRCH) {
4261 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4262                                 qlt_send_busy(vha, atio, 0);
4263 #else
4264                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4265 #endif
4266                         } else {
4267                                 if (tgt->tgt_stop) {
4268                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4269                                             "qla_target: Unable to send "
4270                                             "command to target, sending TERM "
4271                                             "EXCHANGE for rsp\n");
4272                                         qlt_send_term_exchange(vha, NULL,
4273                                             atio, 1);
4274                                 } else {
4275                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
4276                                             "qla_target(%d): Unable to send "
4277                                             "command to target, sending BUSY "
4278                                             "status\n", vha->vp_idx);
4279                                         qlt_send_busy(vha, atio, 0);
4280                                 }
4281                         }
4282                 }
4283         }
4284         break;
4285
4286         case CONTINUE_TGT_IO_TYPE:
4287         {
4288                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4289                 ql_dbg(ql_dbg_tgt, vha, 0xe033,
4290                     "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
4291                 qlt_do_ctio_completion(vha, entry->handle,
4292                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4293                     entry);
4294                 break;
4295         }
4296
4297         case CTIO_A64_TYPE:
4298         {
4299                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4300                 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
4301                     vha->vp_idx);
4302                 qlt_do_ctio_completion(vha, entry->handle,
4303                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4304                     entry);
4305                 break;
4306         }
4307
4308         case IMMED_NOTIFY_TYPE:
4309                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4310                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4311                 break;
4312
4313         case NOTIFY_ACK_TYPE:
4314                 if (tgt->notify_ack_expected > 0) {
4315                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4316                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
4317                             "NOTIFY_ACK seq %08x status %x\n",
4318                             le16_to_cpu(entry->u.isp2x.seq_id),
4319                             le16_to_cpu(entry->u.isp2x.status));
4320                         tgt->notify_ack_expected--;
4321                         if (entry->u.isp2x.status !=
4322                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4323                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4324                                     "qla_target(%d): NOTIFY_ACK "
4325                                     "failed %x\n", vha->vp_idx,
4326                                     le16_to_cpu(entry->u.isp2x.status));
4327                         }
4328                 } else {
4329                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
4330                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4331                             vha->vp_idx);
4332                 }
4333                 break;
4334
4335         case ABTS_RECV_24XX:
4336                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4337                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4338                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4339                 break;
4340
4341         case ABTS_RESP_24XX:
4342                 if (tgt->abts_resp_expected > 0) {
4343                         struct abts_resp_from_24xx_fw *entry =
4344                                 (struct abts_resp_from_24xx_fw *)pkt;
4345                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
4346                             "ABTS_RESP_24XX: compl_status %x\n",
4347                             entry->compl_status);
4348                         tgt->abts_resp_expected--;
4349                         if (le16_to_cpu(entry->compl_status) !=
4350                             ABTS_RESP_COMPL_SUCCESS) {
4351                                 if ((entry->error_subcode1 == 0x1E) &&
4352                                     (entry->error_subcode2 == 0)) {
4353                                         /*
4354                                          * We've got a race here: aborted
4355                                          * exchange not terminated, i.e.
4356                                          * response for the aborted command was
4357                                          * sent between the abort request was
4358                                          * received and processed.
4359                                          * Unfortunately, the firmware has a
4360                                          * silly requirement that all aborted
4361                                          * exchanges must be explicitely
4362                                          * terminated, otherwise it refuses to
4363                                          * send responses for the abort
4364                                          * requests. So, we have to
4365                                          * (re)terminate the exchange and retry
4366                                          * the abort response.
4367                                          */
4368                                         qlt_24xx_retry_term_exchange(vha,
4369                                             entry);
4370                                 } else
4371                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
4372                                             "qla_target(%d): ABTS_RESP_24XX "
4373                                             "failed %x (subcode %x:%x)",
4374                                             vha->vp_idx, entry->compl_status,
4375                                             entry->error_subcode1,
4376                                             entry->error_subcode2);
4377                         }
4378                 } else {
4379                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
4380                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
4381                             "received\n", vha->vp_idx);
4382                 }
4383                 break;
4384
4385         default:
4386                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4387                     "qla_target(%d): Received unknown response pkt "
4388                     "type %x\n", vha->vp_idx, pkt->entry_type);
4389                 break;
4390         }
4391
4392         tgt->irq_cmd_count--;
4393 }
4394
4395 /*
4396  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4397  */
4398 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4399         uint16_t *mailbox)
4400 {
4401         struct qla_hw_data *ha = vha->hw;
4402         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4403         int login_code;
4404
4405         ql_dbg(ql_dbg_tgt, vha, 0xe039,
4406             "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
4407             vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
4408             ha->operating_mode, ha->current_topology);
4409
4410         if (!ha->tgt.tgt_ops)
4411                 return;
4412
4413         if (unlikely(tgt == NULL)) {
4414                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4415                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4416                 return;
4417         }
4418
4419         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4420             IS_QLA2100(ha))
4421                 return;
4422         /*
4423          * In tgt_stop mode we also should allow all requests to pass.
4424          * Otherwise, some commands can stuck.
4425          */
4426
4427         tgt->irq_cmd_count++;
4428
4429         switch (code) {
4430         case MBA_RESET:                 /* Reset */
4431         case MBA_SYSTEM_ERR:            /* System Error */
4432         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
4433         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
4434                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4435                     "qla_target(%d): System error async event %#x "
4436                     "occurred", vha->vp_idx, code);
4437                 break;
4438         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
4439                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4440                 break;
4441
4442         case MBA_LOOP_UP:
4443         {
4444                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4445                     "qla_target(%d): Async LOOP_UP occurred "
4446                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4447                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4448                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4449                 if (tgt->link_reinit_iocb_pending) {
4450                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4451                             0, 0, 0, 0, 0, 0);
4452                         tgt->link_reinit_iocb_pending = 0;
4453                 }
4454                 break;
4455         }
4456
4457         case MBA_LIP_OCCURRED:
4458         case MBA_LOOP_DOWN:
4459         case MBA_LIP_RESET:
4460         case MBA_RSCN_UPDATE:
4461                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4462                     "qla_target(%d): Async event %#x occurred "
4463                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4464                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4465                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4466                 break;
4467
4468         case MBA_PORT_UPDATE:
4469                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4470                     "qla_target(%d): Port update async event %#x "
4471                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4472                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4473                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4474                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4475
4476                 login_code = le16_to_cpu(mailbox[2]);
4477                 if (login_code == 0x4)
4478                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4479                             "Async MB 2: Got PLOGI Complete\n");
4480                 else if (login_code == 0x7)
4481                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4482                             "Async MB 2: Port Logged Out\n");
4483                 break;
4484
4485         default:
4486                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
4487                     "qla_target(%d): Async event %#x occurred: "
4488                     "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4489                     code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4490                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4491                 break;
4492         }
4493
4494         tgt->irq_cmd_count--;
4495 }
4496
4497 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4498         uint16_t loop_id)
4499 {
4500         fc_port_t *fcport;
4501         int rc;
4502
4503         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4504         if (!fcport) {
4505                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4506                     "qla_target(%d): Allocation of tmp FC port failed",
4507                     vha->vp_idx);
4508                 return NULL;
4509         }
4510
4511         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
4512
4513         fcport->loop_id = loop_id;
4514
4515         rc = qla2x00_get_port_database(vha, fcport, 0);
4516         if (rc != QLA_SUCCESS) {
4517                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4518                     "qla_target(%d): Failed to retrieve fcport "
4519                     "information -- get_port_database() returned %x "
4520                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4521                 kfree(fcport);
4522                 return NULL;
4523         }
4524
4525         return fcport;
4526 }
4527
4528 /* Must be called under tgt_mutex */
4529 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4530         uint8_t *s_id)
4531 {
4532         struct qla_tgt_sess *sess = NULL;
4533         fc_port_t *fcport = NULL;
4534         int rc, global_resets;
4535         uint16_t loop_id = 0;
4536
4537 retry:
4538         global_resets =
4539             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4540
4541         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4542         if (rc != 0) {
4543                 if ((s_id[0] == 0xFF) &&
4544                     (s_id[1] == 0xFC)) {
4545                         /*
4546                          * This is Domain Controller, so it should be
4547                          * OK to drop SCSI commands from it.
4548                          */
4549                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4550                             "Unable to find initiator with S_ID %x:%x:%x",
4551                             s_id[0], s_id[1], s_id[2]);
4552                 } else
4553                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4554                             "qla_target(%d): Unable to find "
4555                             "initiator with S_ID %x:%x:%x",
4556                             vha->vp_idx, s_id[0], s_id[1],
4557                             s_id[2]);
4558                 return NULL;
4559         }
4560
4561         fcport = qlt_get_port_database(vha, loop_id);
4562         if (!fcport)
4563                 return NULL;
4564
4565         if (global_resets !=
4566             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4567                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4568                     "qla_target(%d): global reset during session discovery "
4569                     "(counter was %d, new %d), retrying", vha->vp_idx,
4570                     global_resets,
4571                     atomic_read(&vha->vha_tgt.
4572                         qla_tgt->tgt_global_resets_count));
4573                 goto retry;
4574         }
4575
4576         sess = qlt_create_sess(vha, fcport, true);
4577
4578         kfree(fcport);
4579         return sess;
4580 }
4581
4582 static void qlt_abort_work(struct qla_tgt *tgt,
4583         struct qla_tgt_sess_work_param *prm)
4584 {
4585         struct scsi_qla_host *vha = tgt->vha;
4586         struct qla_hw_data *ha = vha->hw;
4587         struct qla_tgt_sess *sess = NULL;
4588         unsigned long flags;
4589         uint32_t be_s_id;
4590         uint8_t s_id[3];
4591         int rc;
4592
4593         spin_lock_irqsave(&ha->hardware_lock, flags);
4594
4595         if (tgt->tgt_stop)
4596                 goto out_term;
4597
4598         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4599         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4600         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4601
4602         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4603             (unsigned char *)&be_s_id);
4604         if (!sess) {
4605                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4606
4607                 mutex_lock(&vha->vha_tgt.tgt_mutex);
4608                 sess = qlt_make_local_sess(vha, s_id);
4609                 /* sess has got an extra creation ref */
4610                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4611
4612                 spin_lock_irqsave(&ha->hardware_lock, flags);
4613                 if (!sess)
4614                         goto out_term;
4615         } else {
4616                 kref_get(&sess->se_sess->sess_kref);
4617         }
4618
4619         if (tgt->tgt_stop)
4620                 goto out_term;
4621
4622         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4623         if (rc != 0)
4624                 goto out_term;
4625
4626         ha->tgt.tgt_ops->put_sess(sess);
4627         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4628         return;
4629
4630 out_term:
4631         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4632         if (sess)
4633                 ha->tgt.tgt_ops->put_sess(sess);
4634         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4635 }
4636
4637 static void qlt_tmr_work(struct qla_tgt *tgt,
4638         struct qla_tgt_sess_work_param *prm)
4639 {
4640         struct atio_from_isp *a = &prm->tm_iocb2;
4641         struct scsi_qla_host *vha = tgt->vha;
4642         struct qla_hw_data *ha = vha->hw;
4643         struct qla_tgt_sess *sess = NULL;
4644         unsigned long flags;
4645         uint8_t *s_id = NULL; /* to hide compiler warnings */
4646         int rc;
4647         uint32_t lun, unpacked_lun;
4648         int lun_size, fn;
4649         void *iocb;
4650
4651         spin_lock_irqsave(&ha->hardware_lock, flags);
4652
4653         if (tgt->tgt_stop)
4654                 goto out_term;
4655
4656         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4657         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4658         if (!sess) {
4659                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4660
4661                 mutex_lock(&vha->vha_tgt.tgt_mutex);
4662                 sess = qlt_make_local_sess(vha, s_id);
4663                 /* sess has got an extra creation ref */
4664                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4665
4666                 spin_lock_irqsave(&ha->hardware_lock, flags);
4667                 if (!sess)
4668                         goto out_term;
4669         } else {
4670                 kref_get(&sess->se_sess->sess_kref);
4671         }
4672
4673         iocb = a;
4674         lun = a->u.isp24.fcp_cmnd.lun;
4675         lun_size = sizeof(lun);
4676         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4677         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4678
4679         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4680         if (rc != 0)
4681                 goto out_term;
4682
4683         ha->tgt.tgt_ops->put_sess(sess);
4684         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4685         return;
4686
4687 out_term:
4688         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4689         if (sess)
4690                 ha->tgt.tgt_ops->put_sess(sess);
4691         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4692 }
4693
4694 static void qlt_sess_work_fn(struct work_struct *work)
4695 {
4696         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4697         struct scsi_qla_host *vha = tgt->vha;
4698         unsigned long flags;
4699
4700         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4701
4702         spin_lock_irqsave(&tgt->sess_work_lock, flags);
4703         while (!list_empty(&tgt->sess_works_list)) {
4704                 struct qla_tgt_sess_work_param *prm = list_entry(
4705                     tgt->sess_works_list.next, typeof(*prm),
4706                     sess_works_list_entry);
4707
4708                 /*
4709                  * This work can be scheduled on several CPUs at time, so we
4710                  * must delete the entry to eliminate double processing
4711                  */
4712                 list_del(&prm->sess_works_list_entry);
4713
4714                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4715
4716                 switch (prm->type) {
4717                 case QLA_TGT_SESS_WORK_ABORT:
4718                         qlt_abort_work(tgt, prm);
4719                         break;
4720                 case QLA_TGT_SESS_WORK_TM:
4721                         qlt_tmr_work(tgt, prm);
4722                         break;
4723                 default:
4724                         BUG_ON(1);
4725                         break;
4726                 }
4727
4728                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4729
4730                 kfree(prm);
4731         }
4732         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4733 }
4734
4735 /* Must be called under tgt_host_action_mutex */
4736 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4737 {
4738         struct qla_tgt *tgt;
4739
4740         if (!QLA_TGT_MODE_ENABLED())
4741                 return 0;
4742
4743         if (!IS_TGT_MODE_CAPABLE(ha)) {
4744                 ql_log(ql_log_warn, base_vha, 0xe070,
4745                     "This adapter does not support target mode.\n");
4746                 return 0;
4747         }
4748
4749         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4750             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
4751
4752         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
4753
4754         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4755         if (!tgt) {
4756                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4757                     "Unable to allocate struct qla_tgt\n");
4758                 return -ENOMEM;
4759         }
4760
4761         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4762                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4763
4764         tgt->ha = ha;
4765         tgt->vha = base_vha;
4766         init_waitqueue_head(&tgt->waitQ);
4767         INIT_LIST_HEAD(&tgt->sess_list);
4768         INIT_LIST_HEAD(&tgt->del_sess_list);
4769         INIT_DELAYED_WORK(&tgt->sess_del_work,
4770                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4771         spin_lock_init(&tgt->sess_work_lock);
4772         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4773         INIT_LIST_HEAD(&tgt->sess_works_list);
4774         spin_lock_init(&tgt->srr_lock);
4775         INIT_LIST_HEAD(&tgt->srr_ctio_list);
4776         INIT_LIST_HEAD(&tgt->srr_imm_list);
4777         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4778         atomic_set(&tgt->tgt_global_resets_count, 0);
4779
4780         base_vha->vha_tgt.qla_tgt = tgt;
4781
4782         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4783                 "qla_target(%d): using 64 Bit PCI addressing",
4784                 base_vha->vp_idx);
4785         tgt->tgt_enable_64bit_addr = 1;
4786         /* 3 is reserved */
4787         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4788         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4789         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4790
4791         if (base_vha->fc_vport)
4792                 return 0;
4793
4794         mutex_lock(&qla_tgt_mutex);
4795         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4796         mutex_unlock(&qla_tgt_mutex);
4797
4798         return 0;
4799 }
4800
4801 /* Must be called under tgt_host_action_mutex */
4802 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4803 {
4804         if (!vha->vha_tgt.qla_tgt)
4805                 return 0;
4806
4807         if (vha->fc_vport) {
4808                 qlt_release(vha->vha_tgt.qla_tgt);
4809                 return 0;
4810         }
4811         mutex_lock(&qla_tgt_mutex);
4812         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
4813         mutex_unlock(&qla_tgt_mutex);
4814
4815         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4816             vha->host_no, ha);
4817         qlt_release(vha->vha_tgt.qla_tgt);
4818
4819         return 0;
4820 }
4821
4822 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4823         unsigned char *b)
4824 {
4825         int i;
4826
4827         pr_debug("qla2xxx HW vha->node_name: ");
4828         for (i = 0; i < WWN_SIZE; i++)
4829                 pr_debug("%02x ", vha->node_name[i]);
4830         pr_debug("\n");
4831         pr_debug("qla2xxx HW vha->port_name: ");
4832         for (i = 0; i < WWN_SIZE; i++)
4833                 pr_debug("%02x ", vha->port_name[i]);
4834         pr_debug("\n");
4835
4836         pr_debug("qla2xxx passed configfs WWPN: ");
4837         put_unaligned_be64(wwpn, b);
4838         for (i = 0; i < WWN_SIZE; i++)
4839                 pr_debug("%02x ", b[i]);
4840         pr_debug("\n");
4841 }
4842
4843 /**
4844  * qla_tgt_lport_register - register lport with external module
4845  *
4846  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4847  * @wwpn: Passwd FC target WWPN
4848  * @callback:  lport initialization callback for tcm_qla2xxx code
4849  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4850  */
4851 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
4852                        u64 npiv_wwpn, u64 npiv_wwnn,
4853                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
4854 {
4855         struct qla_tgt *tgt;
4856         struct scsi_qla_host *vha;
4857         struct qla_hw_data *ha;
4858         struct Scsi_Host *host;
4859         unsigned long flags;
4860         int rc;
4861         u8 b[WWN_SIZE];
4862
4863         mutex_lock(&qla_tgt_mutex);
4864         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4865                 vha = tgt->vha;
4866                 ha = vha->hw;
4867
4868                 host = vha->host;
4869                 if (!host)
4870                         continue;
4871
4872                 if (!(host->hostt->supported_mode & MODE_TARGET))
4873                         continue;
4874
4875                 spin_lock_irqsave(&ha->hardware_lock, flags);
4876                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
4877                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4878                             host->host_no);
4879                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4880                         continue;
4881                 }
4882                 if (tgt->tgt_stop) {
4883                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
4884                                  host->host_no);
4885                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4886                         continue;
4887                 }
4888                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4889
4890                 if (!scsi_host_get(host)) {
4891                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
4892                             "Unable to scsi_host_get() for"
4893                             " qla2xxx scsi_host\n");
4894                         continue;
4895                 }
4896                 qlt_lport_dump(vha, phys_wwpn, b);
4897
4898                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4899                         scsi_host_put(host);
4900                         continue;
4901                 }
4902                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
4903                 if (rc != 0)
4904                         scsi_host_put(host);
4905
4906                 mutex_unlock(&qla_tgt_mutex);
4907                 return rc;
4908         }
4909         mutex_unlock(&qla_tgt_mutex);
4910
4911         return -ENODEV;
4912 }
4913 EXPORT_SYMBOL(qlt_lport_register);
4914
4915 /**
4916  * qla_tgt_lport_deregister - Degister lport
4917  *
4918  * @vha:  Registered scsi_qla_host pointer
4919  */
4920 void qlt_lport_deregister(struct scsi_qla_host *vha)
4921 {
4922         struct qla_hw_data *ha = vha->hw;
4923         struct Scsi_Host *sh = vha->host;
4924         /*
4925          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4926          */
4927         vha->vha_tgt.target_lport_ptr = NULL;
4928         ha->tgt.tgt_ops = NULL;
4929         /*
4930          * Release the Scsi_Host reference for the underlying qla2xxx host
4931          */
4932         scsi_host_put(sh);
4933 }
4934 EXPORT_SYMBOL(qlt_lport_deregister);
4935
4936 /* Must be called under HW lock */
4937 void qlt_set_mode(struct scsi_qla_host *vha)
4938 {
4939         struct qla_hw_data *ha = vha->hw;
4940
4941         switch (ql2x_ini_mode) {
4942         case QLA2XXX_INI_MODE_DISABLED:
4943         case QLA2XXX_INI_MODE_EXCLUSIVE:
4944                 vha->host->active_mode = MODE_TARGET;
4945                 break;
4946         case QLA2XXX_INI_MODE_ENABLED:
4947                 vha->host->active_mode |= MODE_TARGET;
4948                 break;
4949         default:
4950                 break;
4951         }
4952
4953         if (ha->tgt.ini_mode_force_reverse)
4954                 qla_reverse_ini_mode(vha);
4955 }
4956
4957 /* Must be called under HW lock */
4958 void qlt_clear_mode(struct scsi_qla_host *vha)
4959 {
4960         struct qla_hw_data *ha = vha->hw;
4961
4962         switch (ql2x_ini_mode) {
4963         case QLA2XXX_INI_MODE_DISABLED:
4964                 vha->host->active_mode = MODE_UNKNOWN;
4965                 break;
4966         case QLA2XXX_INI_MODE_EXCLUSIVE:
4967                 vha->host->active_mode = MODE_INITIATOR;
4968                 break;
4969         case QLA2XXX_INI_MODE_ENABLED:
4970                 vha->host->active_mode &= ~MODE_TARGET;
4971                 break;
4972         default:
4973                 break;
4974         }
4975
4976         if (ha->tgt.ini_mode_force_reverse)
4977                 qla_reverse_ini_mode(vha);
4978 }
4979
4980 /*
4981  * qla_tgt_enable_vha - NO LOCK HELD
4982  *
4983  * host_reset, bring up w/ Target Mode Enabled
4984  */
4985 void
4986 qlt_enable_vha(struct scsi_qla_host *vha)
4987 {
4988         struct qla_hw_data *ha = vha->hw;
4989         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4990         unsigned long flags;
4991         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
4992
4993         if (!tgt) {
4994                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4995                     "Unable to locate qla_tgt pointer from"
4996                     " struct qla_hw_data\n");
4997                 dump_stack();
4998                 return;
4999         }
5000
5001         spin_lock_irqsave(&ha->hardware_lock, flags);
5002         tgt->tgt_stopped = 0;
5003         qlt_set_mode(vha);
5004         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5005
5006         if (vha->vp_idx) {
5007                 qla24xx_disable_vp(vha);
5008                 qla24xx_enable_vp(vha);
5009         } else {
5010                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5011                 qla2xxx_wake_dpc(base_vha);
5012                 qla2x00_wait_for_hba_online(base_vha);
5013         }
5014 }
5015 EXPORT_SYMBOL(qlt_enable_vha);
5016
5017 /*
5018  * qla_tgt_disable_vha - NO LOCK HELD
5019  *
5020  * Disable Target Mode and reset the adapter
5021  */
5022 void
5023 qlt_disable_vha(struct scsi_qla_host *vha)
5024 {
5025         struct qla_hw_data *ha = vha->hw;
5026         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5027         unsigned long flags;
5028
5029         if (!tgt) {
5030                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5031                     "Unable to locate qla_tgt pointer from"
5032                     " struct qla_hw_data\n");
5033                 dump_stack();
5034                 return;
5035         }
5036
5037         spin_lock_irqsave(&ha->hardware_lock, flags);
5038         qlt_clear_mode(vha);
5039         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5040
5041         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5042         qla2xxx_wake_dpc(vha);
5043         qla2x00_wait_for_hba_online(vha);
5044 }
5045
5046 /*
5047  * Called from qla_init.c:qla24xx_vport_create() contex to setup
5048  * the target mode specific struct scsi_qla_host and struct qla_hw_data
5049  * members.
5050  */
5051 void
5052 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5053 {
5054         if (!qla_tgt_mode_enabled(vha))
5055                 return;
5056
5057         vha->vha_tgt.qla_tgt = NULL;
5058
5059         mutex_init(&vha->vha_tgt.tgt_mutex);
5060         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5061
5062         qlt_clear_mode(vha);
5063
5064         /*
5065          * NOTE: Currently the value is kept the same for <24xx and
5066          * >=24xx ISPs. If it is necessary to change it,
5067          * the check should be added for specific ISPs,
5068          * assigning the value appropriately.
5069          */
5070         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5071
5072         qlt_add_target(ha, vha);
5073 }
5074
5075 void
5076 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5077 {
5078         /*
5079          * FC-4 Feature bit 0 indicates target functionality to the name server.
5080          */
5081         if (qla_tgt_mode_enabled(vha)) {
5082                 if (qla_ini_mode_enabled(vha))
5083                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5084                 else
5085                         ct_req->req.rff_id.fc4_feature = BIT_0;
5086         } else if (qla_ini_mode_enabled(vha)) {
5087                 ct_req->req.rff_id.fc4_feature = BIT_1;
5088         }
5089 }
5090
5091 /*
5092  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5093  * @ha: HA context
5094  *
5095  * Beginning of ATIO ring has initialization control block already built
5096  * by nvram config routine.
5097  *
5098  * Returns 0 on success.
5099  */
5100 void
5101 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5102 {
5103         struct qla_hw_data *ha = vha->hw;
5104         uint16_t cnt;
5105         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5106
5107         if (!qla_tgt_mode_enabled(vha))
5108                 return;
5109
5110         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5111                 pkt->u.raw.signature = ATIO_PROCESSED;
5112                 pkt++;
5113         }
5114
5115 }
5116
5117 /*
5118  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5119  * @ha: SCSI driver HA context
5120  */
5121 void
5122 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5123 {
5124         struct qla_hw_data *ha = vha->hw;
5125         struct atio_from_isp *pkt;
5126         int cnt, i;
5127
5128         if (!vha->flags.online)
5129                 return;
5130
5131         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5132                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5133                 cnt = pkt->u.raw.entry_count;
5134
5135                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5136
5137                 for (i = 0; i < cnt; i++) {
5138                         ha->tgt.atio_ring_index++;
5139                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5140                                 ha->tgt.atio_ring_index = 0;
5141                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5142                         } else
5143                                 ha->tgt.atio_ring_ptr++;
5144
5145                         pkt->u.raw.signature = ATIO_PROCESSED;
5146                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5147                 }
5148                 wmb();
5149         }
5150
5151         /* Adjust ring index */
5152         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5153 }
5154
5155 void
5156 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5157 {
5158         struct qla_hw_data *ha = vha->hw;
5159         if (!QLA_TGT_MODE_ENABLED())
5160                 return;
5161
5162         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5163         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5164         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5165
5166         if (IS_ATIO_MSIX_CAPABLE(ha)) {
5167                 struct qla_msix_entry *msix = &ha->msix_entries[2];
5168                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5169
5170                 icb->msix_atio = cpu_to_le16(msix->entry);
5171                 ql_dbg(ql_dbg_init, vha, 0xf072,
5172                     "Registering ICB vector 0x%x for atio que.\n",
5173                     msix->entry);
5174         }
5175 }
5176
5177 void
5178 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5179 {
5180         struct qla_hw_data *ha = vha->hw;
5181
5182         if (qla_tgt_mode_enabled(vha)) {
5183                 if (!ha->tgt.saved_set) {
5184                         /* We save only once */
5185                         ha->tgt.saved_exchange_count = nv->exchange_count;
5186                         ha->tgt.saved_firmware_options_1 =
5187                             nv->firmware_options_1;
5188                         ha->tgt.saved_firmware_options_2 =
5189                             nv->firmware_options_2;
5190                         ha->tgt.saved_firmware_options_3 =
5191                             nv->firmware_options_3;
5192                         ha->tgt.saved_set = 1;
5193                 }
5194
5195                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5196
5197                 /* Enable target mode */
5198                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5199
5200                 /* Disable ini mode, if requested */
5201                 if (!qla_ini_mode_enabled(vha))
5202                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5203
5204                 /* Disable Full Login after LIP */
5205                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5206                 /* Enable initial LIP */
5207                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5208                 /* Enable FC tapes support */
5209                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
5210                 /* Disable Full Login after LIP */
5211                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5212                 /* Enable target PRLI control */
5213                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5214         } else {
5215                 if (ha->tgt.saved_set) {
5216                         nv->exchange_count = ha->tgt.saved_exchange_count;
5217                         nv->firmware_options_1 =
5218                             ha->tgt.saved_firmware_options_1;
5219                         nv->firmware_options_2 =
5220                             ha->tgt.saved_firmware_options_2;
5221                         nv->firmware_options_3 =
5222                             ha->tgt.saved_firmware_options_3;
5223                 }
5224                 return;
5225         }
5226
5227         /* out-of-order frames reassembly */
5228         nv->firmware_options_3 |= BIT_6|BIT_9;
5229
5230         if (ha->tgt.enable_class_2) {
5231                 if (vha->flags.init_done)
5232                         fc_host_supported_classes(vha->host) =
5233                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5234
5235                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5236         } else {
5237                 if (vha->flags.init_done)
5238                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5239
5240                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5241         }
5242 }
5243
5244 void
5245 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5246         struct init_cb_24xx *icb)
5247 {
5248         struct qla_hw_data *ha = vha->hw;
5249
5250         if (ha->tgt.node_name_set) {
5251                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5252                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5253         }
5254 }
5255
5256 void
5257 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5258 {
5259         struct qla_hw_data *ha = vha->hw;
5260
5261         if (!QLA_TGT_MODE_ENABLED())
5262                 return;
5263
5264         if (qla_tgt_mode_enabled(vha)) {
5265                 if (!ha->tgt.saved_set) {
5266                         /* We save only once */
5267                         ha->tgt.saved_exchange_count = nv->exchange_count;
5268                         ha->tgt.saved_firmware_options_1 =
5269                             nv->firmware_options_1;
5270                         ha->tgt.saved_firmware_options_2 =
5271                             nv->firmware_options_2;
5272                         ha->tgt.saved_firmware_options_3 =
5273                             nv->firmware_options_3;
5274                         ha->tgt.saved_set = 1;
5275                 }
5276
5277                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5278
5279                 /* Enable target mode */
5280                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5281
5282                 /* Disable ini mode, if requested */
5283                 if (!qla_ini_mode_enabled(vha))
5284                         nv->firmware_options_1 |=
5285                             __constant_cpu_to_le32(BIT_5);
5286
5287                 /* Disable Full Login after LIP */
5288                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5289                 /* Enable initial LIP */
5290                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5291                 /* Enable FC tapes support */
5292                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
5293                 /* Disable Full Login after LIP */
5294                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5295                 /* Enable target PRLI control */
5296                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5297         } else {
5298                 if (ha->tgt.saved_set) {
5299                         nv->exchange_count = ha->tgt.saved_exchange_count;
5300                         nv->firmware_options_1 =
5301                             ha->tgt.saved_firmware_options_1;
5302                         nv->firmware_options_2 =
5303                             ha->tgt.saved_firmware_options_2;
5304                         nv->firmware_options_3 =
5305                             ha->tgt.saved_firmware_options_3;
5306                 }
5307                 return;
5308         }
5309
5310         /* out-of-order frames reassembly */
5311         nv->firmware_options_3 |= BIT_6|BIT_9;
5312
5313         if (ha->tgt.enable_class_2) {
5314                 if (vha->flags.init_done)
5315                         fc_host_supported_classes(vha->host) =
5316                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5317
5318                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5319         } else {
5320                 if (vha->flags.init_done)
5321                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5322
5323                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5324         }
5325 }
5326
5327 void
5328 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5329         struct init_cb_81xx *icb)
5330 {
5331         struct qla_hw_data *ha = vha->hw;
5332
5333         if (!QLA_TGT_MODE_ENABLED())
5334                 return;
5335
5336         if (ha->tgt.node_name_set) {
5337                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5338                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5339         }
5340 }
5341
5342 void
5343 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5344 {
5345         if (!QLA_TGT_MODE_ENABLED())
5346                 return;
5347
5348         ha->msix_count += 1; /* For ATIO Q */
5349 }
5350
5351 int
5352 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5353         struct sts_entry_24xx *pkt)
5354 {
5355         switch (pkt->entry_type) {
5356         case ABTS_RECV_24XX:
5357         case ABTS_RESP_24XX:
5358         case CTIO_TYPE7:
5359         case NOTIFY_ACK_TYPE:
5360         case CTIO_CRC2:
5361                 return 1;
5362         default:
5363                 return 0;
5364         }
5365 }
5366
5367 void
5368 qlt_modify_vp_config(struct scsi_qla_host *vha,
5369         struct vp_config_entry_24xx *vpmod)
5370 {
5371         if (qla_tgt_mode_enabled(vha))
5372                 vpmod->options_idx1 &= ~BIT_5;
5373         /* Disable ini mode, if requested */
5374         if (!qla_ini_mode_enabled(vha))
5375                 vpmod->options_idx1 &= ~BIT_4;
5376 }
5377
5378 void
5379 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5380 {
5381         if (!QLA_TGT_MODE_ENABLED())
5382                 return;
5383
5384         if  (ha->mqenable || IS_QLA83XX(ha)) {
5385                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5386                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5387         } else {
5388                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5389                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5390         }
5391
5392         mutex_init(&base_vha->vha_tgt.tgt_mutex);
5393         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5394         qlt_clear_mode(base_vha);
5395 }
5396
5397 irqreturn_t
5398 qla83xx_msix_atio_q(int irq, void *dev_id)
5399 {
5400         struct rsp_que *rsp;
5401         scsi_qla_host_t *vha;
5402         struct qla_hw_data *ha;
5403         unsigned long flags;
5404
5405         rsp = (struct rsp_que *) dev_id;
5406         ha = rsp->hw;
5407         vha = pci_get_drvdata(ha->pdev);
5408
5409         spin_lock_irqsave(&ha->hardware_lock, flags);
5410
5411         qlt_24xx_process_atio_queue(vha);
5412         qla24xx_process_response_queue(vha, rsp);
5413
5414         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5415
5416         return IRQ_HANDLED;
5417 }
5418
5419 int
5420 qlt_mem_alloc(struct qla_hw_data *ha)
5421 {
5422         if (!QLA_TGT_MODE_ENABLED())
5423                 return 0;
5424
5425         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5426             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5427         if (!ha->tgt.tgt_vp_map)
5428                 return -ENOMEM;
5429
5430         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5431             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5432             &ha->tgt.atio_dma, GFP_KERNEL);
5433         if (!ha->tgt.atio_ring) {
5434                 kfree(ha->tgt.tgt_vp_map);
5435                 return -ENOMEM;
5436         }
5437         return 0;
5438 }
5439
5440 void
5441 qlt_mem_free(struct qla_hw_data *ha)
5442 {
5443         if (!QLA_TGT_MODE_ENABLED())
5444                 return;
5445
5446         if (ha->tgt.atio_ring) {
5447                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5448                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5449                     ha->tgt.atio_dma);
5450         }
5451         kfree(ha->tgt.tgt_vp_map);
5452 }
5453
5454 /* vport_slock to be held by the caller */
5455 void
5456 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5457 {
5458         if (!QLA_TGT_MODE_ENABLED())
5459                 return;
5460
5461         switch (cmd) {
5462         case SET_VP_IDX:
5463                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5464                 break;
5465         case SET_AL_PA:
5466                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5467                 break;
5468         case RESET_VP_IDX:
5469                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5470                 break;
5471         case RESET_AL_PA:
5472                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5473                 break;
5474         }
5475 }
5476
5477 static int __init qlt_parse_ini_mode(void)
5478 {
5479         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5480                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5481         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5482                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5483         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5484                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5485         else
5486                 return false;
5487
5488         return true;
5489 }
5490
5491 int __init qlt_init(void)
5492 {
5493         int ret;
5494
5495         if (!qlt_parse_ini_mode()) {
5496                 ql_log(ql_log_fatal, NULL, 0xe06b,
5497                     "qlt_parse_ini_mode() failed\n");
5498                 return -EINVAL;
5499         }
5500
5501         if (!QLA_TGT_MODE_ENABLED())
5502                 return 0;
5503
5504         qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
5505             sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
5506             NULL);
5507         if (!qla_tgt_cmd_cachep) {
5508                 ql_log(ql_log_fatal, NULL, 0xe06c,
5509                     "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
5510                 return -ENOMEM;
5511         }
5512
5513         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5514             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5515             qla_tgt_mgmt_cmd), 0, NULL);
5516         if (!qla_tgt_mgmt_cmd_cachep) {
5517                 ql_log(ql_log_fatal, NULL, 0xe06d,
5518                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5519                 ret = -ENOMEM;
5520                 goto out;
5521         }
5522
5523         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5524             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5525         if (!qla_tgt_mgmt_cmd_mempool) {
5526                 ql_log(ql_log_fatal, NULL, 0xe06e,
5527                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5528                 ret = -ENOMEM;
5529                 goto out_mgmt_cmd_cachep;
5530         }
5531
5532         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5533         if (!qla_tgt_wq) {
5534                 ql_log(ql_log_fatal, NULL, 0xe06f,
5535                     "alloc_workqueue for qla_tgt_wq failed\n");
5536                 ret = -ENOMEM;
5537                 goto out_cmd_mempool;
5538         }
5539         /*
5540          * Return 1 to signal that initiator-mode is being disabled
5541          */
5542         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5543
5544 out_cmd_mempool:
5545         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5546 out_mgmt_cmd_cachep:
5547         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5548 out:
5549         kmem_cache_destroy(qla_tgt_cmd_cachep);
5550         return ret;
5551 }
5552
5553 void qlt_exit(void)
5554 {
5555         if (!QLA_TGT_MODE_ENABLED())
5556                 return;
5557
5558         destroy_workqueue(qla_tgt_wq);
5559         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5560         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5561         kmem_cache_destroy(qla_tgt_cmd_cachep);
5562 }