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