drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"enabled\" (default) - initiator mode will always stay enabled.");
  59
  60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  61
  62 static int temp_sam_status = SAM_STAT_BUSY;
  63
  64 /*
  65  * From scsi/fc/fc_fcp.h
  66  */
  67 enum fcp_resp_rsp_codes {
  68         FCP_TMF_CMPL = 0,
  69         FCP_DATA_LEN_INVALID = 1,
  70         FCP_CMND_FIELDS_INVALID = 2,
  71         FCP_DATA_PARAM_MISMATCH = 3,
  72         FCP_TMF_REJECTED = 4,
  73         FCP_TMF_FAILED = 5,
  74         FCP_TMF_INVALID_LUN = 9,
  75 };
  76
  77 /*
  78  * fc_pri_ta from scsi/fc/fc_fcp.h
  79  */
  80 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  81 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  82 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  83 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  84 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  85 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  86 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  87
  88 /*
  89  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  90  * must be called under HW lock and could unlock/lock it inside.
  91  * It isn't an issue, since in the current implementation on the time when
  92  * those functions are called:
  93  *
  94  *   - Either context is IRQ and only IRQ handler can modify HW data,
  95  *     including rings related fields,
  96  *
  97  *   - Or access to target mode variables from struct qla_tgt doesn't
  98  *     cross those functions boundaries, except tgt_stop, which
  99  *     additionally protected by irq_cmd_count.
 100  */
 101 /* Predefs for callbacks handed to qla2xxx LLD */
 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 103         struct atio_from_isp *pkt, uint8_t);
 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
 106         int fn, void *iocb, int flags);
 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 108         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 110         struct qla_tgt_srr_imm *imm, int ha_lock);
 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
 112         struct qla_tgt_cmd *cmd);
 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 114         struct atio_from_isp *atio, uint16_t status, int qfull);
 115 static void qlt_disable_vha(struct scsi_qla_host *vha);
 116 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 117 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 118         struct imm_ntfy_from_isp *ntfy,
 119         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 120         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 121 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 122         struct imm_ntfy_from_isp *imm, int ha_locked);
 123 /*
 124  * Global Variables
 125  */
 126 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 127 static struct kmem_cache *qla_tgt_plogi_cachep;
 128 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 129 static struct workqueue_struct *qla_tgt_wq;
 130 static DEFINE_MUTEX(qla_tgt_mutex);
 131 static LIST_HEAD(qla_tgt_glist);
 132
 133 /* This API intentionally takes dest as a parameter, rather than returning
 134  * int value to avoid caller forgetting to issue wmb() after the store */
 135 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 136 {
 137         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 138         *dest = atomic_inc_return(&base_vha->generation_tick);
 139         /* memory barrier */
 140         wmb();
 141 }
 142
 143 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 144 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 145         struct qla_tgt *tgt,
 146         const uint8_t *port_name)
 147 {
 148         struct qla_tgt_sess *sess;
 149
 150         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 151                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 152                         return sess;
 153         }
 154
 155         return NULL;
 156 }
 157
 158 /* Might release hw lock, then reaquire!! */
 159 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 160 {
 161         /* Send marker if required */
 162         if (unlikely(vha->marker_needed != 0)) {
 163                 int rc = qla2x00_issue_marker(vha, vha_locked);
 164                 if (rc != QLA_SUCCESS) {
 165                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 166                             "qla_target(%d): issue_marker() failed\n",
 167                             vha->vp_idx);
 168                 }
 169                 return rc;
 170         }
 171         return QLA_SUCCESS;
 172 }
 173
 174 static inline
 175 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 176         uint8_t *d_id)
 177 {
 178         struct qla_hw_data *ha = vha->hw;
 179         uint8_t vp_idx;
 180
 181         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 182                 return NULL;
 183
 184         if (vha->d_id.b.al_pa == d_id[2])
 185                 return vha;
 186
 187         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 188         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 189         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 190                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 191
 192         return NULL;
 193 }
 194
 195 static inline
 196 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 197         uint16_t vp_idx)
 198 {
 199         struct qla_hw_data *ha = vha->hw;
 200
 201         if (vha->vp_idx == vp_idx)
 202                 return vha;
 203
 204         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 205         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 206                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 207
 208         return NULL;
 209 }
 210
 211 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 212 {
 213         unsigned long flags;
 214
 215         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 216
 217         vha->hw->tgt.num_pend_cmds++;
 218         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 219                 vha->qla_stats.stat_max_pend_cmds =
 220                         vha->hw->tgt.num_pend_cmds;
 221         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 222 }
 223 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 224 {
 225         unsigned long flags;
 226
 227         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 228         vha->hw->tgt.num_pend_cmds--;
 229         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 230 }
 231
 232 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 233         struct atio_from_isp *atio, uint8_t ha_locked)
 234 {
 235         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 236                 "%s: qla_target(%d): type %x ox_id %04x\n",
 237                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 238                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 239
 240         switch (atio->u.raw.entry_type) {
 241         case ATIO_TYPE7:
 242         {
 243                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 244                     atio->u.isp24.fcp_hdr.d_id);
 245                 if (unlikely(NULL == host)) {
 246                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 247                             "qla_target(%d): Received ATIO_TYPE7 "
 248                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 249                             atio->u.isp24.fcp_hdr.d_id[0],
 250                             atio->u.isp24.fcp_hdr.d_id[1],
 251                             atio->u.isp24.fcp_hdr.d_id[2]);
 252                         break;
 253                 }
 254                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 255                 break;
 256         }
 257
 258         case IMMED_NOTIFY_TYPE:
 259         {
 260                 struct scsi_qla_host *host = vha;
 261                 struct imm_ntfy_from_isp *entry =
 262                     (struct imm_ntfy_from_isp *)atio;
 263
 264                 if ((entry->u.isp24.vp_index != 0xFF) &&
 265                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 266                         host = qlt_find_host_by_vp_idx(vha,
 267                             entry->u.isp24.vp_index);
 268                         if (unlikely(!host)) {
 269                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 270                                     "qla_target(%d): Received "
 271                                     "ATIO (IMMED_NOTIFY_TYPE) "
 272                                     "with unknown vp_index %d\n",
 273                                     vha->vp_idx, entry->u.isp24.vp_index);
 274                                 break;
 275                         }
 276                 }
 277                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 278                 break;
 279         }
 280
 281         default:
 282                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 283                     "qla_target(%d): Received unknown ATIO atio "
 284                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 285                 break;
 286         }
 287
 288         return false;
 289 }
 290
 291 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 292 {
 293         switch (pkt->entry_type) {
 294         case CTIO_CRC2:
 295                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 296                         "qla_target(%d):%s: CRC2 Response pkt\n",
 297                         vha->vp_idx, __func__);
 298         case CTIO_TYPE7:
 299         {
 300                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 301                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 302                     entry->vp_index);
 303                 if (unlikely(!host)) {
 304                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 305                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 306                             "received, with unknown vp_index %d\n",
 307                             vha->vp_idx, entry->vp_index);
 308                         break;
 309                 }
 310                 qlt_response_pkt(host, pkt);
 311                 break;
 312         }
 313
 314         case IMMED_NOTIFY_TYPE:
 315         {
 316                 struct scsi_qla_host *host = vha;
 317                 struct imm_ntfy_from_isp *entry =
 318                     (struct imm_ntfy_from_isp *)pkt;
 319
 320                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 321                 if (unlikely(!host)) {
 322                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 323                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 324                             "received, with unknown vp_index %d\n",
 325                             vha->vp_idx, entry->u.isp24.vp_index);
 326                         break;
 327                 }
 328                 qlt_response_pkt(host, pkt);
 329                 break;
 330         }
 331
 332         case NOTIFY_ACK_TYPE:
 333         {
 334                 struct scsi_qla_host *host = vha;
 335                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 336
 337                 if (0xFF != entry->u.isp24.vp_index) {
 338                         host = qlt_find_host_by_vp_idx(vha,
 339                             entry->u.isp24.vp_index);
 340                         if (unlikely(!host)) {
 341                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 342                                     "qla_target(%d): Response "
 343                                     "pkt (NOTIFY_ACK_TYPE) "
 344                                     "received, with unknown "
 345                                     "vp_index %d\n", vha->vp_idx,
 346                                     entry->u.isp24.vp_index);
 347                                 break;
 348                         }
 349                 }
 350                 qlt_response_pkt(host, pkt);
 351                 break;
 352         }
 353
 354         case ABTS_RECV_24XX:
 355         {
 356                 struct abts_recv_from_24xx *entry =
 357                     (struct abts_recv_from_24xx *)pkt;
 358                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 359                     entry->vp_index);
 360                 if (unlikely(!host)) {
 361                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 362                             "qla_target(%d): Response pkt "
 363                             "(ABTS_RECV_24XX) received, with unknown "
 364                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 365                         break;
 366                 }
 367                 qlt_response_pkt(host, pkt);
 368                 break;
 369         }
 370
 371         case ABTS_RESP_24XX:
 372         {
 373                 struct abts_resp_to_24xx *entry =
 374                     (struct abts_resp_to_24xx *)pkt;
 375                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 376                     entry->vp_index);
 377                 if (unlikely(!host)) {
 378                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 379                             "qla_target(%d): Response pkt "
 380                             "(ABTS_RECV_24XX) received, with unknown "
 381                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 382                         break;
 383                 }
 384                 qlt_response_pkt(host, pkt);
 385                 break;
 386         }
 387
 388         default:
 389                 qlt_response_pkt(vha, pkt);
 390                 break;
 391         }
 392
 393 }
 394
 395 /*
 396  * All qlt_plogi_ack_t operations are protected by hardware_lock
 397  */
 398
 399 /*
 400  * This is a zero-base ref-counting solution, since hardware_lock
 401  * guarantees that ref_count is not modified concurrently.
 402  * Upon successful return content of iocb is undefined
 403  */
 404 static qlt_plogi_ack_t *
 405 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 406                        struct imm_ntfy_from_isp *iocb)
 407 {
 408         qlt_plogi_ack_t *pla;
 409
 410         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 411                 if (pla->id.b24 == id->b24) {
 412                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 413                         pla->iocb = *iocb;
 414                         return pla;
 415                 }
 416         }
 417
 418         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 419         if (!pla) {
 420                 ql_dbg(ql_dbg_async, vha, 0x5088,
 421                        "qla_target(%d): Allocation of plogi_ack failed\n",
 422                        vha->vp_idx);
 423                 return NULL;
 424         }
 425
 426         pla->iocb = *iocb;
 427         pla->id = *id;
 428         list_add_tail(&pla->list, &vha->plogi_ack_list);
 429
 430         return pla;
 431 }
 432
 433 static void qlt_plogi_ack_unref(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla)
 434 {
 435         BUG_ON(!pla->ref_count);
 436         pla->ref_count--;
 437
 438         if (pla->ref_count)
 439                 return;
 440
 441         ql_dbg(ql_dbg_async, vha, 0x5089,
 442             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 443             " exch %#x ox_id %#x\n", pla->iocb.u.isp24.port_name,
 444             pla->iocb.u.isp24.port_id[2], pla->iocb.u.isp24.port_id[1],
 445             pla->iocb.u.isp24.port_id[0],
 446             le16_to_cpu(pla->iocb.u.isp24.nport_handle),
 447             pla->iocb.u.isp24.exchange_address, pla->iocb.ox_id);
 448         qlt_send_notify_ack(vha, &pla->iocb, 0, 0, 0, 0, 0, 0);
 449
 450         list_del(&pla->list);
 451         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 452 }
 453
 454 static void
 455 qlt_plogi_ack_link(struct scsi_qla_host *vha, qlt_plogi_ack_t *pla,
 456     struct qla_tgt_sess *sess, qlt_plogi_link_t link)
 457 {
 458         /* Inc ref_count first because link might already be pointing at pla */
 459         pla->ref_count++;
 460
 461         if (sess->plogi_link[link])
 462                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 463
 464         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 465             "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 466             " s_id %02x:%02x:%02x, ref=%d\n", sess, link, sess->port_name,
 467             pla->iocb.u.isp24.port_name, pla->iocb.u.isp24.port_id[2],
 468             pla->iocb.u.isp24.port_id[1], pla->iocb.u.isp24.port_id[0],
 469             pla->ref_count);
 470
 471         sess->plogi_link[link] = pla;
 472 }
 473
 474 typedef struct {
 475         /* These fields must be initialized by the caller */
 476         port_id_t id;
 477         /*
 478          * number of cmds dropped while we were waiting for
 479          * initiator to ack LOGO initialize to 1 if LOGO is
 480          * triggered by a command, otherwise, to 0
 481          */
 482         int cmd_count;
 483
 484         /* These fields are used by callee */
 485         struct list_head list;
 486 } qlt_port_logo_t;
 487
 488 static void
 489 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 490 {
 491         qlt_port_logo_t *tmp;
 492         int res;
 493
 494         mutex_lock(&vha->vha_tgt.tgt_mutex);
 495
 496         list_for_each_entry(tmp, &vha->logo_list, list) {
 497                 if (tmp->id.b24 == logo->id.b24) {
 498                         tmp->cmd_count += logo->cmd_count;
 499                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 500                         return;
 501                 }
 502         }
 503
 504         list_add_tail(&logo->list, &vha->logo_list);
 505
 506         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 507
 508         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 509
 510         mutex_lock(&vha->vha_tgt.tgt_mutex);
 511         list_del(&logo->list);
 512         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 513
 514         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 515             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 516             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 517             logo->cmd_count, res);
 518 }
 519
 520 static void qlt_free_session_done(struct work_struct *work)
 521 {
 522         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 523             free_work);
 524         struct qla_tgt *tgt = sess->tgt;
 525         struct scsi_qla_host *vha = sess->vha;
 526         struct qla_hw_data *ha = vha->hw;
 527         unsigned long flags;
 528         bool logout_started = false;
 529         fc_port_t fcport;
 530
 531         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 532                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 533                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 534                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 535                 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 536                 sess->logout_on_delete, sess->keep_nport_handle,
 537                 sess->send_els_logo);
 538
 539         BUG_ON(!tgt);
 540
 541         if (sess->send_els_logo) {
 542                 qlt_port_logo_t logo;
 543                 logo.id = sess->s_id;
 544                 logo.cmd_count = 0;
 545                 qlt_send_first_logo(vha, &logo);
 546         }
 547
 548         if (sess->logout_on_delete) {
 549                 int rc;
 550
 551                 memset(&fcport, 0, sizeof(fcport));
 552                 fcport.loop_id = sess->loop_id;
 553                 fcport.d_id = sess->s_id;
 554                 memcpy(fcport.port_name, sess->port_name, WWN_SIZE);
 555                 fcport.vha = vha;
 556                 fcport.tgt_session = sess;
 557
 558                 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL);
 559                 if (rc != QLA_SUCCESS)
 560                         ql_log(ql_log_warn, vha, 0xf085,
 561                                "Schedule logo failed sess %p rc %d\n",
 562                                sess, rc);
 563                 else
 564                         logout_started = true;
 565         }
 566
 567         /*
 568          * Release the target session for FC Nexus from fabric module code.
 569          */
 570         if (sess->se_sess != NULL)
 571                 ha->tgt.tgt_ops->free_session(sess);
 572
 573         if (logout_started) {
 574                 bool traced = false;
 575
 576                 while (!ACCESS_ONCE(sess->logout_completed)) {
 577                         if (!traced) {
 578                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
 579                                         "%s: waiting for sess %p logout\n",
 580                                         __func__, sess);
 581                                 traced = true;
 582                         }
 583                         msleep(100);
 584                 }
 585
 586                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
 587                         "%s: sess %p logout completed\n",
 588                         __func__, sess);
 589         }
 590
 591         spin_lock_irqsave(&ha->hardware_lock, flags);
 592
 593         {
 594                 qlt_plogi_ack_t *own =
 595                     sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 596                 qlt_plogi_ack_t *con =
 597                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
 598
 599                 if (con) {
 600                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
 601                             "se_sess %p / sess %p port %8phC is gone,"
 602                             " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
 603                             sess->se_sess, sess, sess->port_name,
 604                             own ? "releasing own PLOGI" :
 605                             "no own PLOGI pending",
 606                             own ? own->ref_count : -1,
 607                             con->iocb.u.isp24.port_name, con->ref_count);
 608                         qlt_plogi_ack_unref(vha, con);
 609                 } else {
 610                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
 611                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
 612                             sess->se_sess, sess, sess->port_name,
 613                             own ? "releasing own PLOGI" :
 614                             "no own PLOGI pending",
 615                             own ? own->ref_count : -1);
 616                 }
 617
 618                 if (own)
 619                         qlt_plogi_ack_unref(vha, own);
 620         }
 621
 622         list_del(&sess->sess_list_entry);
 623
 624         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 625
 626         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 627             "Unregistration of sess %p finished\n", sess);
 628
 629         kfree(sess);
 630         /*
 631          * We need to protect against race, when tgt is freed before or
 632          * inside wake_up()
 633          */
 634         tgt->sess_count--;
 635         if (tgt->sess_count == 0)
 636                 wake_up_all(&tgt->waitQ);
 637 }
 638
 639 /* ha->tgt.sess_lock supposed to be held on entry */
 640 static void qlt_release_session(struct kref *kref)
 641 {
 642         struct qla_tgt_sess *sess =
 643                 container_of(kref, struct qla_tgt_sess, sess_kref);
 644         struct scsi_qla_host *vha = sess->vha;
 645
 646         if (sess->se_sess)
 647                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 648
 649         if (!list_empty(&sess->del_list_entry))
 650                 list_del_init(&sess->del_list_entry);
 651         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 652
 653         INIT_WORK(&sess->free_work, qlt_free_session_done);
 654         schedule_work(&sess->free_work);
 655 }
 656
 657 void qlt_put_sess(struct qla_tgt_sess *sess)
 658 {
 659         if (!sess)
 660                 return;
 661
 662         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 663         kref_put(&sess->sess_kref, qlt_release_session);
 664 }
 665 EXPORT_SYMBOL(qlt_put_sess);
 666
 667 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 668 {
 669         struct qla_hw_data *ha = vha->hw;
 670         struct qla_tgt_sess *sess = NULL;
 671         uint16_t loop_id;
 672         int res = 0;
 673         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 674         unsigned long flags;
 675
 676         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 677         if (loop_id == 0xFFFF) {
 678                 /* Global event */
 679                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
 680                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 681                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
 682                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 683 #if 0 /* FIXME: do we need to choose a session here? */
 684                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 685                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 686                             typeof(*sess), sess_list_entry);
 687                         switch (mcmd) {
 688                         case QLA_TGT_NEXUS_LOSS_SESS:
 689                                 mcmd = QLA_TGT_NEXUS_LOSS;
 690                                 break;
 691                         case QLA_TGT_ABORT_ALL_SESS:
 692                                 mcmd = QLA_TGT_ABORT_ALL;
 693                                 break;
 694                         case QLA_TGT_NEXUS_LOSS:
 695                         case QLA_TGT_ABORT_ALL:
 696                                 break;
 697                         default:
 698                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 699                                     "qla_target(%d): Not allowed "
 700                                     "command %x in %s", vha->vp_idx,
 701                                     mcmd, __func__);
 702                                 sess = NULL;
 703                                 break;
 704                         }
 705                 } else
 706                         sess = NULL;
 707 #endif
 708         } else {
 709                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 710                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 711                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 712         }
 713
 714         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 715             "Using sess for qla_tgt_reset: %p\n", sess);
 716         if (!sess) {
 717                 res = -ESRCH;
 718                 return res;
 719         }
 720
 721         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 722             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 723             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 724             mcmd, loop_id);
 725
 726         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
 727 }
 728
 729 /* ha->tgt.sess_lock supposed to be held on entry */
 730 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 731         bool immediate)
 732 {
 733         struct qla_tgt *tgt = sess->tgt;
 734         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 735
 736         if (sess->deleted) {
 737                 /* Upgrade to unconditional deletion in case it was temporary */
 738                 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
 739                         list_del(&sess->del_list_entry);
 740                 else
 741                         return;
 742         }
 743
 744         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 745             "Scheduling sess %p for deletion\n", sess);
 746
 747         if (immediate) {
 748                 dev_loss_tmo = 0;
 749                 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 750                 list_add(&sess->del_list_entry, &tgt->del_sess_list);
 751         } else {
 752                 sess->deleted = QLA_SESS_DELETION_PENDING;
 753                 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 754         }
 755
 756         sess->expires = jiffies + dev_loss_tmo * HZ;
 757
 758         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 759             "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
 760             " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
 761             sess->vha->vp_idx, sess->port_name, sess->loop_id,
 762             sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 763             dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
 764             sess->generation);
 765
 766         if (immediate)
 767                 mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
 768         else
 769                 schedule_delayed_work(&tgt->sess_del_work,
 770                     sess->expires - jiffies);
 771 }
 772
 773 /* ha->tgt.sess_lock supposed to be held on entry */
 774 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
 775 {
 776         struct qla_tgt_sess *sess;
 777
 778         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 779                 qlt_schedule_sess_for_deletion(sess, true);
 780
 781         /* At this point tgt could be already dead */
 782 }
 783
 784 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 785         uint16_t *loop_id)
 786 {
 787         struct qla_hw_data *ha = vha->hw;
 788         dma_addr_t gid_list_dma;
 789         struct gid_list_info *gid_list;
 790         char *id_iter;
 791         int res, rc, i;
 792         uint16_t entries;
 793
 794         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 795             &gid_list_dma, GFP_KERNEL);
 796         if (!gid_list) {
 797                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 798                     "qla_target(%d): DMA Alloc failed of %u\n",
 799                     vha->vp_idx, qla2x00_gid_list_size(ha));
 800                 return -ENOMEM;
 801         }
 802
 803         /* Get list of logged in devices */
 804         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 805         if (rc != QLA_SUCCESS) {
 806                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 807                     "qla_target(%d): get_id_list() failed: %x\n",
 808                     vha->vp_idx, rc);
 809                 res = -EBUSY;
 810                 goto out_free_id_list;
 811         }
 812
 813         id_iter = (char *)gid_list;
 814         res = -ENOENT;
 815         for (i = 0; i < entries; i++) {
 816                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 817                 if ((gid->al_pa == s_id[2]) &&
 818                     (gid->area == s_id[1]) &&
 819                     (gid->domain == s_id[0])) {
 820                         *loop_id = le16_to_cpu(gid->loop_id);
 821                         res = 0;
 822                         break;
 823                 }
 824                 id_iter += ha->gid_list_info_size;
 825         }
 826
 827 out_free_id_list:
 828         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 829             gid_list, gid_list_dma);
 830         return res;
 831 }
 832
 833 /* ha->tgt.sess_lock supposed to be held on entry */
 834 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 835 {
 836         BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
 837
 838         list_del_init(&sess->del_list_entry);
 839         sess->deleted = 0;
 840 }
 841
 842 static void qlt_del_sess_work_fn(struct delayed_work *work)
 843 {
 844         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 845             sess_del_work);
 846         struct scsi_qla_host *vha = tgt->vha;
 847         struct qla_hw_data *ha = vha->hw;
 848         struct qla_tgt_sess *sess;
 849         unsigned long flags, elapsed;
 850
 851         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 852         while (!list_empty(&tgt->del_sess_list)) {
 853                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 854                     del_list_entry);
 855                 elapsed = jiffies;
 856                 if (time_after_eq(elapsed, sess->expires)) {
 857                         /* No turning back */
 858                         list_del_init(&sess->del_list_entry);
 859                         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 860
 861                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 862                             "Timeout: sess %p about to be deleted\n",
 863                             sess);
 864                         if (sess->se_sess)
 865                                 ha->tgt.tgt_ops->shutdown_sess(sess);
 866                         qlt_put_sess(sess);
 867                 } else {
 868                         schedule_delayed_work(&tgt->sess_del_work,
 869                             sess->expires - elapsed);
 870                         break;
 871                 }
 872         }
 873         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 874 }
 875
 876 /*
 877  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 878  * Caller must put it.
 879  */
 880 static struct qla_tgt_sess *qlt_create_sess(
 881         struct scsi_qla_host *vha,
 882         fc_port_t *fcport,
 883         bool local)
 884 {
 885         struct qla_hw_data *ha = vha->hw;
 886         struct qla_tgt_sess *sess;
 887         unsigned long flags;
 888
 889         /* Check to avoid double sessions */
 890         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 891         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 892                                 sess_list_entry) {
 893                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 894                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 895                             "Double sess %p found (s_id %x:%x:%x, "
 896                             "loop_id %d), updating to d_id %x:%x:%x, "
 897                             "loop_id %d", sess, sess->s_id.b.domain,
 898                             sess->s_id.b.al_pa, sess->s_id.b.area,
 899                             sess->loop_id, fcport->d_id.b.domain,
 900                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 901                             fcport->loop_id);
 902
 903                         /* Cannot undelete at this point */
 904                         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 905                                 spin_unlock_irqrestore(&ha->tgt.sess_lock,
 906                                     flags);
 907                                 return NULL;
 908                         }
 909
 910                         if (sess->deleted)
 911                                 qlt_undelete_sess(sess);
 912
 913                         if (!sess->se_sess) {
 914                                 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 915                                     &sess->port_name[0], sess) < 0) {
 916                                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 917                                         return NULL;
 918                                 }
 919                         }
 920
 921                         kref_get(&sess->sess_kref);
 922                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 923                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 924
 925                         if (sess->local && !local)
 926                                 sess->local = 0;
 927
 928                         qlt_do_generation_tick(vha, &sess->generation);
 929
 930                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 931
 932                         return sess;
 933                 }
 934         }
 935         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 936
 937         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 938         if (!sess) {
 939                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 940                     "qla_target(%u): session allocation failed, all commands "
 941                     "from port %8phC will be refused", vha->vp_idx,
 942                     fcport->port_name);
 943
 944                 return NULL;
 945         }
 946         sess->tgt = vha->vha_tgt.qla_tgt;
 947         sess->vha = vha;
 948         sess->s_id = fcport->d_id;
 949         sess->loop_id = fcport->loop_id;
 950         sess->local = local;
 951         kref_init(&sess->sess_kref);
 952         INIT_LIST_HEAD(&sess->del_list_entry);
 953
 954         /* Under normal circumstances we want to logout from firmware when
 955          * session eventually ends and release corresponding nport handle.
 956          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
 957          * code will adjust these flags as necessary. */
 958         sess->logout_on_delete = 1;
 959         sess->keep_nport_handle = 0;
 960
 961         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 962             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 963             sess, vha->vha_tgt.qla_tgt);
 964
 965         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 966         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 967         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 968
 969         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 970         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 971         vha->vha_tgt.qla_tgt->sess_count++;
 972         qlt_do_generation_tick(vha, &sess->generation);
 973         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 974
 975         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 976             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 977             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 978             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 979             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 980             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 981
 982         /*
 983          * Determine if this fc_port->port_name is allowed to access
 984          * target mode using explict NodeACLs+MappedLUNs, or using
 985          * TPG demo mode.  If this is successful a target mode FC nexus
 986          * is created.
 987          */
 988         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 989             &fcport->port_name[0], sess) < 0) {
 990                 return NULL;
 991         } else {
 992                 /*
 993                  * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 994                  * access across ->tgt.sess_lock reaquire.
 995                  */
 996                 kref_get(&sess->sess_kref);
 997         }
 998
 999         return sess;
1000 }
1001
1002 /*
1003  * Called from qla2x00_reg_remote_port()
1004  */
1005 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
1006 {
1007         struct qla_hw_data *ha = vha->hw;
1008         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1009         struct qla_tgt_sess *sess;
1010         unsigned long flags;
1011
1012         if (!vha->hw->tgt.tgt_ops)
1013                 return;
1014
1015         if (!tgt || (fcport->port_type != FCT_INITIATOR))
1016                 return;
1017
1018         if (qla_ini_mode_enabled(vha))
1019                 return;
1020
1021         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1022         if (tgt->tgt_stop) {
1023                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1024                 return;
1025         }
1026         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
1027         if (!sess) {
1028                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1029
1030                 mutex_lock(&vha->vha_tgt.tgt_mutex);
1031                 sess = qlt_create_sess(vha, fcport, false);
1032                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
1033
1034                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1035         } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1036                 /* Point of no return */
1037                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1038                 return;
1039         } else {
1040                 kref_get(&sess->sess_kref);
1041
1042                 if (sess->deleted) {
1043                         qlt_undelete_sess(sess);
1044
1045                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
1046                             "qla_target(%u): %ssession for port %8phC "
1047                             "(loop ID %d) reappeared\n", vha->vp_idx,
1048                             sess->local ? "local " : "", sess->port_name,
1049                             sess->loop_id);
1050
1051                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
1052                             "Reappeared sess %p\n", sess);
1053                 }
1054                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
1055                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
1056         }
1057
1058         if (sess && sess->local) {
1059                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
1060                     "qla_target(%u): local session for "
1061                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
1062                     fcport->port_name, sess->loop_id);
1063                 sess->local = 0;
1064         }
1065         qlt_put_sess(sess);
1066         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1067 }
1068
1069 /*
1070  * max_gen - specifies maximum session generation
1071  * at which this deletion requestion is still valid
1072  */
1073 void
1074 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1075 {
1076         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1077         struct qla_tgt_sess *sess;
1078         unsigned long flags;
1079
1080         if (!vha->hw->tgt.tgt_ops)
1081                 return;
1082
1083         if (!tgt)
1084                 return;
1085
1086         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1087         if (tgt->tgt_stop) {
1088                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1089                 return;
1090         }
1091         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
1092         if (!sess) {
1093                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1094                 return;
1095         }
1096
1097         if (max_gen - sess->generation < 0) {
1098                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1099                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1100                     "Ignoring stale deletion request for se_sess %p / sess %p"
1101                     " for port %8phC, req_gen %d, sess_gen %d\n",
1102                     sess->se_sess, sess, sess->port_name, max_gen,
1103                     sess->generation);
1104                 return;
1105         }
1106
1107         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1108
1109         sess->local = 1;
1110         qlt_schedule_sess_for_deletion(sess, false);
1111         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1112 }
1113
1114 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1115 {
1116         struct qla_hw_data *ha = tgt->ha;
1117         unsigned long flags;
1118         int res;
1119         /*
1120          * We need to protect against race, when tgt is freed before or
1121          * inside wake_up()
1122          */
1123         spin_lock_irqsave(&ha->hardware_lock, flags);
1124         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1125             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
1126             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
1127         res = (tgt->sess_count == 0);
1128         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1129
1130         return res;
1131 }
1132
1133 /* Called by tcm_qla2xxx configfs code */
1134 int qlt_stop_phase1(struct qla_tgt *tgt)
1135 {
1136         struct scsi_qla_host *vha = tgt->vha;
1137         struct qla_hw_data *ha = tgt->ha;
1138         unsigned long flags;
1139
1140         mutex_lock(&qla_tgt_mutex);
1141         if (!vha->fc_vport) {
1142                 struct Scsi_Host *sh = vha->host;
1143                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1144                 bool npiv_vports;
1145
1146                 spin_lock_irqsave(sh->host_lock, flags);
1147                 npiv_vports = (fc_host->npiv_vports_inuse);
1148                 spin_unlock_irqrestore(sh->host_lock, flags);
1149
1150                 if (npiv_vports) {
1151                         mutex_unlock(&qla_tgt_mutex);
1152                         return -EPERM;
1153                 }
1154         }
1155         if (tgt->tgt_stop || tgt->tgt_stopped) {
1156                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1157                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1158                 mutex_unlock(&qla_tgt_mutex);
1159                 return -EPERM;
1160         }
1161
1162         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1163             vha->host_no, vha);
1164         /*
1165          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1166          * Lock is needed, because we still can get an incoming packet.
1167          */
1168         mutex_lock(&vha->vha_tgt.tgt_mutex);
1169         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1170         tgt->tgt_stop = 1;
1171         qlt_clear_tgt_db(tgt);
1172         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1173         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1174         mutex_unlock(&qla_tgt_mutex);
1175
1176         flush_delayed_work(&tgt->sess_del_work);
1177
1178         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1179             "Waiting for sess works (tgt %p)", tgt);
1180         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1181         while (!list_empty(&tgt->sess_works_list)) {
1182                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1183                 flush_scheduled_work();
1184                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1185         }
1186         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1187
1188         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1189             "Waiting for tgt %p: list_empty(sess_list)=%d "
1190             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
1191             tgt->sess_count);
1192
1193         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1194
1195         /* Big hammer */
1196         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
1197                 qlt_disable_vha(vha);
1198
1199         /* Wait for sessions to clear out (just in case) */
1200         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1201         return 0;
1202 }
1203 EXPORT_SYMBOL(qlt_stop_phase1);
1204
1205 /* Called by tcm_qla2xxx configfs code */
1206 void qlt_stop_phase2(struct qla_tgt *tgt)
1207 {
1208         struct qla_hw_data *ha = tgt->ha;
1209         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1210         unsigned long flags;
1211
1212         if (tgt->tgt_stopped) {
1213                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1214                     "Already in tgt->tgt_stopped state\n");
1215                 dump_stack();
1216                 return;
1217         }
1218
1219         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1220             "Waiting for %d IRQ commands to complete (tgt %p)",
1221             tgt->irq_cmd_count, tgt);
1222
1223         mutex_lock(&vha->vha_tgt.tgt_mutex);
1224         spin_lock_irqsave(&ha->hardware_lock, flags);
1225         while ((tgt->irq_cmd_count != 0) || (tgt->atio_irq_cmd_count != 0)) {
1226                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1227                 udelay(2);
1228                 spin_lock_irqsave(&ha->hardware_lock, flags);
1229         }
1230         tgt->tgt_stop = 0;
1231         tgt->tgt_stopped = 1;
1232         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1233         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1234
1235         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1236             tgt);
1237 }
1238 EXPORT_SYMBOL(qlt_stop_phase2);
1239
1240 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1241 static void qlt_release(struct qla_tgt *tgt)
1242 {
1243         scsi_qla_host_t *vha = tgt->vha;
1244
1245         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1246                 qlt_stop_phase2(tgt);
1247
1248         vha->vha_tgt.qla_tgt = NULL;
1249
1250         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1251             "Release of tgt %p finished\n", tgt);
1252
1253         kfree(tgt);
1254 }
1255
1256 /* ha->hardware_lock supposed to be held on entry */
1257 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1258         const void *param, unsigned int param_size)
1259 {
1260         struct qla_tgt_sess_work_param *prm;
1261         unsigned long flags;
1262
1263         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1264         if (!prm) {
1265                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1266                     "qla_target(%d): Unable to create session "
1267                     "work, command will be refused", 0);
1268                 return -ENOMEM;
1269         }
1270
1271         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1272             "Scheduling work (type %d, prm %p)"
1273             " to find session for param %p (size %d, tgt %p)\n",
1274             type, prm, param, param_size, tgt);
1275
1276         prm->type = type;
1277         memcpy(&prm->tm_iocb, param, param_size);
1278
1279         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1280         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1281         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1282
1283         schedule_work(&tgt->sess_work);
1284
1285         return 0;
1286 }
1287
1288 /*
1289  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1290  */
1291 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1292         struct imm_ntfy_from_isp *ntfy,
1293         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1294         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1295 {
1296         struct qla_hw_data *ha = vha->hw;
1297         request_t *pkt;
1298         struct nack_to_isp *nack;
1299
1300         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1301
1302         /* Send marker if required */
1303         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1304                 return;
1305
1306         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1307         if (!pkt) {
1308                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1309                     "qla_target(%d): %s failed: unable to allocate "
1310                     "request packet\n", vha->vp_idx, __func__);
1311                 return;
1312         }
1313
1314         if (vha->vha_tgt.qla_tgt != NULL)
1315                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1316
1317         pkt->entry_type = NOTIFY_ACK_TYPE;
1318         pkt->entry_count = 1;
1319
1320         nack = (struct nack_to_isp *)pkt;
1321         nack->ox_id = ntfy->ox_id;
1322
1323         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1324         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1325                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1326                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1327         }
1328         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1329         nack->u.isp24.status = ntfy->u.isp24.status;
1330         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1331         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1332         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1333         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1334         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1335         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1336         nack->u.isp24.srr_reject_code = srr_reject_code;
1337         nack->u.isp24.srr_reject_code_expl = srr_explan;
1338         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1339
1340         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1341             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1342             vha->vp_idx, nack->u.isp24.status);
1343
1344         /* Memory Barrier */
1345         wmb();
1346         qla2x00_start_iocbs(vha, vha->req);
1347 }
1348
1349 /*
1350  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1351  */
1352 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1353         struct abts_recv_from_24xx *abts, uint32_t status,
1354         bool ids_reversed)
1355 {
1356         struct qla_hw_data *ha = vha->hw;
1357         struct abts_resp_to_24xx *resp;
1358         uint32_t f_ctl;
1359         uint8_t *p;
1360
1361         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1362             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1363             ha, abts, status);
1364
1365         /* Send marker if required */
1366         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1367                 return;
1368
1369         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1370         if (!resp) {
1371                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1372                     "qla_target(%d): %s failed: unable to allocate "
1373                     "request packet", vha->vp_idx, __func__);
1374                 return;
1375         }
1376
1377         resp->entry_type = ABTS_RESP_24XX;
1378         resp->entry_count = 1;
1379         resp->nport_handle = abts->nport_handle;
1380         resp->vp_index = vha->vp_idx;
1381         resp->sof_type = abts->sof_type;
1382         resp->exchange_address = abts->exchange_address;
1383         resp->fcp_hdr_le = abts->fcp_hdr_le;
1384         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1385             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1386             F_CTL_SEQ_INITIATIVE);
1387         p = (uint8_t *)&f_ctl;
1388         resp->fcp_hdr_le.f_ctl[0] = *p++;
1389         resp->fcp_hdr_le.f_ctl[1] = *p++;
1390         resp->fcp_hdr_le.f_ctl[2] = *p;
1391         if (ids_reversed) {
1392                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1393                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1394                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1395                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1396                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1397                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1398         } else {
1399                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1400                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1401                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1402                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1403                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1404                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1405         }
1406         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1407         if (status == FCP_TMF_CMPL) {
1408                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1409                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1410                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1411                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1412                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1413                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1414         } else {
1415                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1416                 resp->payload.ba_rjt.reason_code =
1417                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1418                 /* Other bytes are zero */
1419         }
1420
1421         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1422
1423         /* Memory Barrier */
1424         wmb();
1425         qla2x00_start_iocbs(vha, vha->req);
1426 }
1427
1428 /*
1429  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1430  */
1431 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1432         struct abts_resp_from_24xx_fw *entry)
1433 {
1434         struct ctio7_to_24xx *ctio;
1435
1436         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1437             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1438         /* Send marker if required */
1439         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1440                 return;
1441
1442         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1443         if (ctio == NULL) {
1444                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1445                     "qla_target(%d): %s failed: unable to allocate "
1446                     "request packet\n", vha->vp_idx, __func__);
1447                 return;
1448         }
1449
1450         /*
1451          * We've got on entrance firmware's response on by us generated
1452          * ABTS response. So, in it ID fields are reversed.
1453          */
1454
1455         ctio->entry_type = CTIO_TYPE7;
1456         ctio->entry_count = 1;
1457         ctio->nport_handle = entry->nport_handle;
1458         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1459         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1460         ctio->vp_index = vha->vp_idx;
1461         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1462         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1463         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1464         ctio->exchange_addr = entry->exchange_addr_to_abort;
1465         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1466                                             CTIO7_FLAGS_TERMINATE);
1467         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1468
1469         /* Memory Barrier */
1470         wmb();
1471         qla2x00_start_iocbs(vha, vha->req);
1472
1473         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1474             FCP_TMF_CMPL, true);
1475 }
1476
1477 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1478 {
1479         struct qla_tgt_sess_op *op;
1480         struct qla_tgt_cmd *cmd;
1481
1482         spin_lock(&vha->cmd_list_lock);
1483
1484         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1485                 if (tag == op->atio.u.isp24.exchange_addr) {
1486                         op->aborted = true;
1487                         spin_unlock(&vha->cmd_list_lock);
1488                         return 1;
1489                 }
1490         }
1491
1492         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1493                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1494                         cmd->aborted = 1;
1495                         spin_unlock(&vha->cmd_list_lock);
1496                         return 1;
1497                 }
1498         }
1499
1500         spin_unlock(&vha->cmd_list_lock);
1501         return 0;
1502 }
1503
1504 /* drop cmds for the given lun
1505  * XXX only looks for cmds on the port through which lun reset was recieved
1506  * XXX does not go through the list of other port (which may have cmds
1507  *     for the same lun)
1508  */
1509 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1510                                 uint32_t lun, uint8_t *s_id)
1511 {
1512         struct qla_tgt_sess_op *op;
1513         struct qla_tgt_cmd *cmd;
1514         uint32_t key;
1515
1516         key = sid_to_key(s_id);
1517         spin_lock(&vha->cmd_list_lock);
1518         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1519                 uint32_t op_key;
1520                 uint32_t op_lun;
1521
1522                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1523                 op_lun = scsilun_to_int(
1524                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1525                 if (op_key == key && op_lun == lun)
1526                         op->aborted = true;
1527         }
1528         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1529                 uint32_t cmd_key;
1530                 uint32_t cmd_lun;
1531
1532                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1533                 cmd_lun = scsilun_to_int(
1534                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1535                 if (cmd_key == key && cmd_lun == lun)
1536                         cmd->aborted = 1;
1537         }
1538         spin_unlock(&vha->cmd_list_lock);
1539 }
1540
1541 /* ha->hardware_lock supposed to be held on entry */
1542 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1543         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1544 {
1545         struct qla_hw_data *ha = vha->hw;
1546         struct se_session *se_sess = sess->se_sess;
1547         struct qla_tgt_mgmt_cmd *mcmd;
1548         struct se_cmd *se_cmd;
1549         u32 lun = 0;
1550         int rc;
1551         bool found_lun = false;
1552
1553         spin_lock(&se_sess->sess_cmd_lock);
1554         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1555                 struct qla_tgt_cmd *cmd =
1556                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1557                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1558                         lun = cmd->unpacked_lun;
1559                         found_lun = true;
1560                         break;
1561                 }
1562         }
1563         spin_unlock(&se_sess->sess_cmd_lock);
1564
1565         /* cmd not in LIO lists, look in qla list */
1566         if (!found_lun) {
1567                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1568                         /* send TASK_ABORT response immediately */
1569                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1570                         return 0;
1571                 } else {
1572                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1573                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1574                             abts->exchange_addr_to_abort);
1575                         return -ENOENT;
1576                 }
1577         }
1578
1579         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1580             "qla_target(%d): task abort (tag=%d)\n",
1581             vha->vp_idx, abts->exchange_addr_to_abort);
1582
1583         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1584         if (mcmd == NULL) {
1585                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1586                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1587                     vha->vp_idx, __func__);
1588                 return -ENOMEM;
1589         }
1590         memset(mcmd, 0, sizeof(*mcmd));
1591
1592         mcmd->sess = sess;
1593         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1594         mcmd->reset_count = vha->hw->chip_reset;
1595
1596         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1597             abts->exchange_addr_to_abort);
1598         if (rc != 0) {
1599                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1600                     "qla_target(%d):  tgt_ops->handle_tmr()"
1601                     " failed: %d", vha->vp_idx, rc);
1602                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1603                 return -EFAULT;
1604         }
1605
1606         return 0;
1607 }
1608
1609 /*
1610  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1611  */
1612 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1613         struct abts_recv_from_24xx *abts)
1614 {
1615         struct qla_hw_data *ha = vha->hw;
1616         struct qla_tgt_sess *sess;
1617         uint32_t tag = abts->exchange_addr_to_abort;
1618         uint8_t s_id[3];
1619         int rc;
1620         unsigned long flags;
1621
1622         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1623                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1624                     "qla_target(%d): ABTS: Abort Sequence not "
1625                     "supported\n", vha->vp_idx);
1626                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1627                 return;
1628         }
1629
1630         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1631                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1632                     "qla_target(%d): ABTS: Unknown Exchange "
1633                     "Address received\n", vha->vp_idx);
1634                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1635                 return;
1636         }
1637
1638         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1639             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1640             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1641             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1642             le32_to_cpu(abts->fcp_hdr_le.parameter));
1643
1644         s_id[0] = abts->fcp_hdr_le.s_id[2];
1645         s_id[1] = abts->fcp_hdr_le.s_id[1];
1646         s_id[2] = abts->fcp_hdr_le.s_id[0];
1647
1648         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1649         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1650         if (!sess) {
1651                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1652                     "qla_target(%d): task abort for non-existant session\n",
1653                     vha->vp_idx);
1654                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1655                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1656
1657                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1658
1659                 if (rc != 0) {
1660                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1661                             false);
1662                 }
1663                 return;
1664         }
1665         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1666
1667
1668         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1669                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1670                 return;
1671         }
1672
1673         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1674         if (rc != 0) {
1675                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1676                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1677                     vha->vp_idx, rc);
1678                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1679                 return;
1680         }
1681 }
1682
1683 /*
1684  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1685  */
1686 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1687         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1688 {
1689         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1690         struct ctio7_to_24xx *ctio;
1691         uint16_t temp;
1692
1693         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1694             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1695             ha, atio, resp_code);
1696
1697         /* Send marker if required */
1698         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1699                 return;
1700
1701         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1702         if (ctio == NULL) {
1703                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1704                     "qla_target(%d): %s failed: unable to allocate "
1705                     "request packet\n", ha->vp_idx, __func__);
1706                 return;
1707         }
1708
1709         ctio->entry_type = CTIO_TYPE7;
1710         ctio->entry_count = 1;
1711         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1712         ctio->nport_handle = mcmd->sess->loop_id;
1713         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1714         ctio->vp_index = ha->vp_idx;
1715         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1716         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1717         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1718         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1719         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1720             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1721         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1722         ctio->u.status1.ox_id = cpu_to_le16(temp);
1723         ctio->u.status1.scsi_status =
1724             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1725         ctio->u.status1.response_len = cpu_to_le16(8);
1726         ctio->u.status1.sense_data[0] = resp_code;
1727
1728         /* Memory Barrier */
1729         wmb();
1730         qla2x00_start_iocbs(ha, ha->req);
1731 }
1732
1733 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1734 {
1735         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1736 }
1737 EXPORT_SYMBOL(qlt_free_mcmd);
1738
1739 /* callback from target fabric module code */
1740 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1741 {
1742         struct scsi_qla_host *vha = mcmd->sess->vha;
1743         struct qla_hw_data *ha = vha->hw;
1744         unsigned long flags;
1745
1746         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1747             "TM response mcmd (%p) status %#x state %#x",
1748             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1749
1750         spin_lock_irqsave(&ha->hardware_lock, flags);
1751
1752         if (!vha->flags.online || mcmd->reset_count != ha->chip_reset) {
1753                 /*
1754                  * Either the port is not online or this request was from
1755                  * previous life, just abort the processing.
1756                  */
1757                 ql_dbg(ql_dbg_async, vha, 0xe100,
1758                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
1759                         vha->flags.online, qla2x00_reset_active(vha),
1760                         mcmd->reset_count, ha->chip_reset);
1761                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1762                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1763                 return;
1764         }
1765
1766         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1767                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1768                     0, 0, 0, 0, 0, 0);
1769         else {
1770                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
1771                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1772                             mcmd->fc_tm_rsp, false);
1773                 else
1774                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1775                             mcmd->fc_tm_rsp);
1776         }
1777         /*
1778          * Make the callback for ->free_mcmd() to queue_work() and invoke
1779          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1780          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1781          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1782          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1783          * qlt_xmit_tm_rsp() returns here..
1784          */
1785         ha->tgt.tgt_ops->free_mcmd(mcmd);
1786         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1787 }
1788 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1789
1790 /* No locks */
1791 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1792 {
1793         struct qla_tgt_cmd *cmd = prm->cmd;
1794
1795         BUG_ON(cmd->sg_cnt == 0);
1796
1797         prm->sg = (struct scatterlist *)cmd->sg;
1798         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1799             cmd->sg_cnt, cmd->dma_data_direction);
1800         if (unlikely(prm->seg_cnt == 0))
1801                 goto out_err;
1802
1803         prm->cmd->sg_mapped = 1;
1804
1805         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1806                 /*
1807                  * If greater than four sg entries then we need to allocate
1808                  * the continuation entries
1809                  */
1810                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1811                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1812                         prm->tgt->datasegs_per_cmd,
1813                         prm->tgt->datasegs_per_cont);
1814         } else {
1815                 /* DIF */
1816                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1817                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1818                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1819                         prm->tot_dsds = prm->seg_cnt;
1820                 } else
1821                         prm->tot_dsds = prm->seg_cnt;
1822
1823                 if (cmd->prot_sg_cnt) {
1824                         prm->prot_sg      = cmd->prot_sg;
1825                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1826                                 cmd->prot_sg, cmd->prot_sg_cnt,
1827                                 cmd->dma_data_direction);
1828                         if (unlikely(prm->prot_seg_cnt == 0))
1829                                 goto out_err;
1830
1831                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1832                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1833                                 /* Dif Bundling not support here */
1834                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1835                                                                 cmd->blk_sz);
1836                                 prm->tot_dsds += prm->prot_seg_cnt;
1837                         } else
1838                                 prm->tot_dsds += prm->prot_seg_cnt;
1839                 }
1840         }
1841
1842         return 0;
1843
1844 out_err:
1845         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1846             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1847             0, prm->cmd->sg_cnt);
1848         return -1;
1849 }
1850
1851 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1852 {
1853         struct qla_hw_data *ha = vha->hw;
1854
1855         if (!cmd->sg_mapped)
1856                 return;
1857
1858         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1859         cmd->sg_mapped = 0;
1860
1861         if (cmd->prot_sg_cnt)
1862                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1863                         cmd->dma_data_direction);
1864
1865         if (cmd->ctx_dsd_alloced)
1866                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1867
1868         if (cmd->ctx)
1869                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1870 }
1871
1872 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1873         uint32_t req_cnt)
1874 {
1875         uint32_t cnt, cnt_in;
1876
1877         if (vha->req->cnt < (req_cnt + 2)) {
1878                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1879                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1880
1881                 if  (vha->req->ring_index < cnt)
1882                         vha->req->cnt = cnt - vha->req->ring_index;
1883                 else
1884                         vha->req->cnt = vha->req->length -
1885                             (vha->req->ring_index - cnt);
1886
1887                 if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1888                         ql_dbg(ql_dbg_io, vha, 0x305a,
1889                             "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
1890                             vha->vp_idx, vha->req->ring_index,
1891                             vha->req->cnt, req_cnt, cnt, cnt_in,
1892                             vha->req->length);
1893                         return -EAGAIN;
1894                 }
1895         }
1896
1897         vha->req->cnt -= req_cnt;
1898
1899         return 0;
1900 }
1901
1902 /*
1903  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1904  */
1905 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1906 {
1907         /* Adjust ring index. */
1908         vha->req->ring_index++;
1909         if (vha->req->ring_index == vha->req->length) {
1910                 vha->req->ring_index = 0;
1911                 vha->req->ring_ptr = vha->req->ring;
1912         } else {
1913                 vha->req->ring_ptr++;
1914         }
1915         return (cont_entry_t *)vha->req->ring_ptr;
1916 }
1917
1918 /* ha->hardware_lock supposed to be held on entry */
1919 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1920 {
1921         struct qla_hw_data *ha = vha->hw;
1922         uint32_t h;
1923
1924         h = ha->tgt.current_handle;
1925         /* always increment cmd handle */
1926         do {
1927                 ++h;
1928                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1929                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1930                 if (h == ha->tgt.current_handle) {
1931                         ql_dbg(ql_dbg_io, vha, 0x305b,
1932                             "qla_target(%d): Ran out of "
1933                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1934                         h = QLA_TGT_NULL_HANDLE;
1935                         break;
1936                 }
1937         } while ((h == QLA_TGT_NULL_HANDLE) ||
1938             (h == QLA_TGT_SKIP_HANDLE) ||
1939             (ha->tgt.cmds[h-1] != NULL));
1940
1941         if (h != QLA_TGT_NULL_HANDLE)
1942                 ha->tgt.current_handle = h;
1943
1944         return h;
1945 }
1946
1947 /* ha->hardware_lock supposed to be held on entry */
1948 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1949         struct scsi_qla_host *vha)
1950 {
1951         uint32_t h;
1952         struct ctio7_to_24xx *pkt;
1953         struct qla_hw_data *ha = vha->hw;
1954         struct atio_from_isp *atio = &prm->cmd->atio;
1955         uint16_t temp;
1956
1957         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1958         prm->pkt = pkt;
1959         memset(pkt, 0, sizeof(*pkt));
1960
1961         pkt->entry_type = CTIO_TYPE7;
1962         pkt->entry_count = (uint8_t)prm->req_cnt;
1963         pkt->vp_index = vha->vp_idx;
1964
1965         h = qlt_make_handle(vha);
1966         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1967                 /*
1968                  * CTIO type 7 from the firmware doesn't provide a way to
1969                  * know the initiator's LOOP ID, hence we can't find
1970                  * the session and, so, the command.
1971                  */
1972                 return -EAGAIN;
1973         } else
1974                 ha->tgt.cmds[h-1] = prm->cmd;
1975
1976         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1977         pkt->nport_handle = prm->cmd->loop_id;
1978         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1979         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1980         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1981         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1982         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1983         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1984         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1985         pkt->u.status0.ox_id = cpu_to_le16(temp);
1986         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1987
1988         return 0;
1989 }
1990
1991 /*
1992  * ha->hardware_lock supposed to be held on entry. We have already made sure
1993  * that there is sufficient amount of request entries to not drop it.
1994  */
1995 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1996         struct scsi_qla_host *vha)
1997 {
1998         int cnt;
1999         uint32_t *dword_ptr;
2000         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2001
2002         /* Build continuation packets */
2003         while (prm->seg_cnt > 0) {
2004                 cont_a64_entry_t *cont_pkt64 =
2005                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
2006
2007                 /*
2008                  * Make sure that from cont_pkt64 none of
2009                  * 64-bit specific fields used for 32-bit
2010                  * addressing. Cast to (cont_entry_t *) for
2011                  * that.
2012                  */
2013
2014                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2015
2016                 cont_pkt64->entry_count = 1;
2017                 cont_pkt64->sys_define = 0;
2018
2019                 if (enable_64bit_addressing) {
2020                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2021                         dword_ptr =
2022                             (uint32_t *)&cont_pkt64->dseg_0_address;
2023                 } else {
2024                         cont_pkt64->entry_type = CONTINUE_TYPE;
2025                         dword_ptr =
2026                             (uint32_t *)&((cont_entry_t *)
2027                                 cont_pkt64)->dseg_0_address;
2028                 }
2029
2030                 /* Load continuation entry data segments */
2031                 for (cnt = 0;
2032                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
2033                     cnt++, prm->seg_cnt--) {
2034                         *dword_ptr++ =
2035                             cpu_to_le32(pci_dma_lo32
2036                                 (sg_dma_address(prm->sg)));
2037                         if (enable_64bit_addressing) {
2038                                 *dword_ptr++ =
2039                                     cpu_to_le32(pci_dma_hi32
2040                                         (sg_dma_address
2041                                         (prm->sg)));
2042                         }
2043                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2044
2045                         prm->sg = sg_next(prm->sg);
2046                 }
2047         }
2048 }
2049
2050 /*
2051  * ha->hardware_lock supposed to be held on entry. We have already made sure
2052  * that there is sufficient amount of request entries to not drop it.
2053  */
2054 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
2055         struct scsi_qla_host *vha)
2056 {
2057         int cnt;
2058         uint32_t *dword_ptr;
2059         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
2060         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2061
2062         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2063
2064         /* Setup packet address segment pointer */
2065         dword_ptr = pkt24->u.status0.dseg_0_address;
2066
2067         /* Set total data segment count */
2068         if (prm->seg_cnt)
2069                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2070
2071         if (prm->seg_cnt == 0) {
2072                 /* No data transfer */
2073                 *dword_ptr++ = 0;
2074                 *dword_ptr = 0;
2075                 return;
2076         }
2077
2078         /* If scatter gather */
2079
2080         /* Load command entry data segments */
2081         for (cnt = 0;
2082             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
2083             cnt++, prm->seg_cnt--) {
2084                 *dword_ptr++ =
2085                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2086                 if (enable_64bit_addressing) {
2087                         *dword_ptr++ =
2088                             cpu_to_le32(pci_dma_hi32(
2089                                 sg_dma_address(prm->sg)));
2090                 }
2091                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2092
2093                 prm->sg = sg_next(prm->sg);
2094         }
2095
2096         qlt_load_cont_data_segments(prm, vha);
2097 }
2098
2099 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2100 {
2101         return cmd->bufflen > 0;
2102 }
2103
2104 /*
2105  * Called without ha->hardware_lock held
2106  */
2107 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2108         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2109         uint32_t *full_req_cnt)
2110 {
2111         struct qla_tgt *tgt = cmd->tgt;
2112         struct scsi_qla_host *vha = tgt->vha;
2113         struct qla_hw_data *ha = vha->hw;
2114         struct se_cmd *se_cmd = &cmd->se_cmd;
2115
2116         prm->cmd = cmd;
2117         prm->tgt = tgt;
2118         prm->rq_result = scsi_status;
2119         prm->sense_buffer = &cmd->sense_buffer[0];
2120         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2121         prm->sg = NULL;
2122         prm->seg_cnt = -1;
2123         prm->req_cnt = 1;
2124         prm->add_status_pkt = 0;
2125
2126         /* Send marker if required */
2127         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2128                 return -EFAULT;
2129
2130         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2131                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2132                         return -EAGAIN;
2133         }
2134
2135         *full_req_cnt = prm->req_cnt;
2136
2137         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2138                 prm->residual = se_cmd->residual_count;
2139                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
2140                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2141                        prm->residual, se_cmd->tag,
2142                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2143                        cmd->bufflen, prm->rq_result);
2144                 prm->rq_result |= SS_RESIDUAL_UNDER;
2145         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2146                 prm->residual = se_cmd->residual_count;
2147                 ql_dbg(ql_dbg_io, vha, 0x305d,
2148                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2149                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2150                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2151                 prm->rq_result |= SS_RESIDUAL_OVER;
2152         }
2153
2154         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2155                 /*
2156                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2157                  * ignored in *xmit_response() below
2158                  */
2159                 if (qlt_has_data(cmd)) {
2160                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2161                             (IS_FWI2_CAPABLE(ha) &&
2162                             (prm->rq_result != 0))) {
2163                                 prm->add_status_pkt = 1;
2164                                 (*full_req_cnt)++;
2165                         }
2166                 }
2167         }
2168
2169         return 0;
2170 }
2171
2172 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
2173         struct qla_tgt_cmd *cmd, int sending_sense)
2174 {
2175         if (ha->tgt.enable_class_2)
2176                 return 0;
2177
2178         if (sending_sense)
2179                 return cmd->conf_compl_supported;
2180         else
2181                 return ha->tgt.enable_explicit_conf &&
2182                     cmd->conf_compl_supported;
2183 }
2184
2185 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
2186 /*
2187  *  Original taken from the XFS code
2188  */
2189 static unsigned long qlt_srr_random(void)
2190 {
2191         static int Inited;
2192         static unsigned long RandomValue;
2193         static DEFINE_SPINLOCK(lock);
2194         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2195         register long rv;
2196         register long lo;
2197         register long hi;
2198         unsigned long flags;
2199
2200         spin_lock_irqsave(&lock, flags);
2201         if (!Inited) {
2202                 RandomValue = jiffies;
2203                 Inited = 1;
2204         }
2205         rv = RandomValue;
2206         hi = rv / 127773;
2207         lo = rv % 127773;
2208         rv = 16807 * lo - 2836 * hi;
2209         if (rv <= 0)
2210                 rv += 2147483647;
2211         RandomValue = rv;
2212         spin_unlock_irqrestore(&lock, flags);
2213         return rv;
2214 }
2215
2216 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2217 {
2218 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2219         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2220             == 50) {
2221                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2222                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2223                     "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2224         }
2225 #endif
2226         /*
2227          * It's currently not possible to simulate SRRs for FCP_WRITE without
2228          * a physical link layer failure, so don't even try here..
2229          */
2230         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2231                 return;
2232
2233         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2234             ((qlt_srr_random() % 100) == 20)) {
2235                 int i, leave = 0;
2236                 unsigned int tot_len = 0;
2237
2238                 while (leave == 0)
2239                         leave = qlt_srr_random() % cmd->sg_cnt;
2240
2241                 for (i = 0; i < leave; i++)
2242                         tot_len += cmd->sg[i].length;
2243
2244                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2245                     "Cutting cmd %p (tag %d) buffer"
2246                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2247                     " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2248                     cmd->bufflen, cmd->sg_cnt);
2249
2250                 cmd->bufflen = tot_len;
2251                 cmd->sg_cnt = leave;
2252         }
2253
2254         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2255                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2256
2257                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2258                     "Cutting cmd %p (tag %d) buffer head "
2259                     "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2260                     cmd->bufflen);
2261                 if (offset == 0)
2262                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
2263                 else if (qlt_set_data_offset(cmd, offset)) {
2264                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2265                             "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2266                 }
2267         }
2268 }
2269 #else
2270 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2271 {}
2272 #endif
2273
2274 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2275         struct qla_tgt_prm *prm)
2276 {
2277         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2278             (uint32_t)sizeof(ctio->u.status1.sense_data));
2279         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2280         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2281                 ctio->u.status0.flags |= cpu_to_le16(
2282                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2283                     CTIO7_FLAGS_CONFORM_REQ);
2284         }
2285         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2286         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2287         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2288                 int i;
2289
2290                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2291                         if (prm->cmd->se_cmd.scsi_status != 0) {
2292                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2293                                     "Skipping EXPLICIT_CONFORM and "
2294                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2295                                     "non GOOD status\n");
2296                                 goto skip_explict_conf;
2297                         }
2298                         ctio->u.status1.flags |= cpu_to_le16(
2299                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2300                             CTIO7_FLAGS_CONFORM_REQ);
2301                 }
2302 skip_explict_conf:
2303                 ctio->u.status1.flags &=
2304                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2305                 ctio->u.status1.flags |=
2306                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2307                 ctio->u.status1.scsi_status |=
2308                     cpu_to_le16(SS_SENSE_LEN_VALID);
2309                 ctio->u.status1.sense_length =
2310                     cpu_to_le16(prm->sense_buffer_len);
2311                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2312                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2313                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2314 #if 0
2315                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2316                         static int q;
2317                         if (q < 10) {
2318                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2319                                     "qla_target(%d): %d bytes of sense "
2320                                     "lost", prm->tgt->ha->vp_idx,
2321                                     prm->sense_buffer_len % 4);
2322                                 q++;
2323                         }
2324                 }
2325 #endif
2326         } else {
2327                 ctio->u.status1.flags &=
2328                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2329                 ctio->u.status1.flags |=
2330                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2331                 ctio->u.status1.sense_length = 0;
2332                 memset(ctio->u.status1.sense_data, 0,
2333                     sizeof(ctio->u.status1.sense_data));
2334         }
2335
2336         /* Sense with len > 24, is it possible ??? */
2337 }
2338
2339
2340
2341 /* diff  */
2342 static inline int
2343 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2344 {
2345         /*
2346          * Uncomment when corresponding SCSI changes are done.
2347          *
2348          if (!sp->cmd->prot_chk)
2349          return 0;
2350          *
2351          */
2352         switch (se_cmd->prot_op) {
2353         case TARGET_PROT_DOUT_INSERT:
2354         case TARGET_PROT_DIN_STRIP:
2355                 if (ql2xenablehba_err_chk >= 1)
2356                         return 1;
2357                 break;
2358         case TARGET_PROT_DOUT_PASS:
2359         case TARGET_PROT_DIN_PASS:
2360                 if (ql2xenablehba_err_chk >= 2)
2361                         return 1;
2362                 break;
2363         case TARGET_PROT_DIN_INSERT:
2364         case TARGET_PROT_DOUT_STRIP:
2365                 return 1;
2366         default:
2367                 break;
2368         }
2369         return 0;
2370 }
2371
2372 /*
2373  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2374  *
2375  */
2376 static inline void
2377 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2378 {
2379         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2380
2381         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2382          * have been immplemented by TCM, before AppTag is avail.
2383          * Look for modesense_handlers[]
2384          */
2385         ctx->app_tag = 0;
2386         ctx->app_tag_mask[0] = 0x0;
2387         ctx->app_tag_mask[1] = 0x0;
2388
2389         switch (se_cmd->prot_type) {
2390         case TARGET_DIF_TYPE0_PROT:
2391                 /*
2392                  * No check for ql2xenablehba_err_chk, as it would be an
2393                  * I/O error if hba tag generation is not done.
2394                  */
2395                 ctx->ref_tag = cpu_to_le32(lba);
2396
2397                 if (!qlt_hba_err_chk_enabled(se_cmd))
2398                         break;
2399
2400                 /* enable ALL bytes of the ref tag */
2401                 ctx->ref_tag_mask[0] = 0xff;
2402                 ctx->ref_tag_mask[1] = 0xff;
2403                 ctx->ref_tag_mask[2] = 0xff;
2404                 ctx->ref_tag_mask[3] = 0xff;
2405                 break;
2406         /*
2407          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2408          * 16 bit app tag.
2409          */
2410         case TARGET_DIF_TYPE1_PROT:
2411                 ctx->ref_tag = cpu_to_le32(lba);
2412
2413                 if (!qlt_hba_err_chk_enabled(se_cmd))
2414                         break;
2415
2416                 /* enable ALL bytes of the ref tag */
2417                 ctx->ref_tag_mask[0] = 0xff;
2418                 ctx->ref_tag_mask[1] = 0xff;
2419                 ctx->ref_tag_mask[2] = 0xff;
2420                 ctx->ref_tag_mask[3] = 0xff;
2421                 break;
2422         /*
2423          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2424          * match LBA in CDB + N
2425          */
2426         case TARGET_DIF_TYPE2_PROT:
2427                 ctx->ref_tag = cpu_to_le32(lba);
2428
2429                 if (!qlt_hba_err_chk_enabled(se_cmd))
2430                         break;
2431
2432                 /* enable ALL bytes of the ref tag */
2433                 ctx->ref_tag_mask[0] = 0xff;
2434                 ctx->ref_tag_mask[1] = 0xff;
2435                 ctx->ref_tag_mask[2] = 0xff;
2436                 ctx->ref_tag_mask[3] = 0xff;
2437                 break;
2438
2439         /* For Type 3 protection: 16 bit GUARD only */
2440         case TARGET_DIF_TYPE3_PROT:
2441                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2442                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2443                 break;
2444         }
2445 }
2446
2447
2448 static inline int
2449 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2450 {
2451         uint32_t                *cur_dsd;
2452         uint32_t                transfer_length = 0;
2453         uint32_t                data_bytes;
2454         uint32_t                dif_bytes;
2455         uint8_t                 bundling = 1;
2456         uint8_t                 *clr_ptr;
2457         struct crc_context      *crc_ctx_pkt = NULL;
2458         struct qla_hw_data      *ha;
2459         struct ctio_crc2_to_fw  *pkt;
2460         dma_addr_t              crc_ctx_dma;
2461         uint16_t                fw_prot_opts = 0;
2462         struct qla_tgt_cmd      *cmd = prm->cmd;
2463         struct se_cmd           *se_cmd = &cmd->se_cmd;
2464         uint32_t h;
2465         struct atio_from_isp *atio = &prm->cmd->atio;
2466         uint16_t t16;
2467
2468         ha = vha->hw;
2469
2470         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2471         prm->pkt = pkt;
2472         memset(pkt, 0, sizeof(*pkt));
2473
2474         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2475                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2476                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2477                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2478
2479         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2480             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2481                 bundling = 0;
2482
2483         /* Compute dif len and adjust data len to incude protection */
2484         data_bytes = cmd->bufflen;
2485         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2486
2487         switch (se_cmd->prot_op) {
2488         case TARGET_PROT_DIN_INSERT:
2489         case TARGET_PROT_DOUT_STRIP:
2490                 transfer_length = data_bytes;
2491                 data_bytes += dif_bytes;
2492                 break;
2493
2494         case TARGET_PROT_DIN_STRIP:
2495         case TARGET_PROT_DOUT_INSERT:
2496         case TARGET_PROT_DIN_PASS:
2497         case TARGET_PROT_DOUT_PASS:
2498                 transfer_length = data_bytes + dif_bytes;
2499                 break;
2500
2501         default:
2502                 BUG();
2503                 break;
2504         }
2505
2506         if (!qlt_hba_err_chk_enabled(se_cmd))
2507                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2508         /* HBA error checking enabled */
2509         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2510                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2511                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2512                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2513                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2514                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2515         }
2516
2517         switch (se_cmd->prot_op) {
2518         case TARGET_PROT_DIN_INSERT:
2519         case TARGET_PROT_DOUT_INSERT:
2520                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2521                 break;
2522         case TARGET_PROT_DIN_STRIP:
2523         case TARGET_PROT_DOUT_STRIP:
2524                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2525                 break;
2526         case TARGET_PROT_DIN_PASS:
2527         case TARGET_PROT_DOUT_PASS:
2528                 fw_prot_opts |= PO_MODE_DIF_PASS;
2529                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2530                 break;
2531         default:/* Normal Request */
2532                 fw_prot_opts |= PO_MODE_DIF_PASS;
2533                 break;
2534         }
2535
2536
2537         /* ---- PKT ---- */
2538         /* Update entry type to indicate Command Type CRC_2 IOCB */
2539         pkt->entry_type  = CTIO_CRC2;
2540         pkt->entry_count = 1;
2541         pkt->vp_index = vha->vp_idx;
2542
2543         h = qlt_make_handle(vha);
2544         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2545                 /*
2546                  * CTIO type 7 from the firmware doesn't provide a way to
2547                  * know the initiator's LOOP ID, hence we can't find
2548                  * the session and, so, the command.
2549                  */
2550                 return -EAGAIN;
2551         } else
2552                 ha->tgt.cmds[h-1] = prm->cmd;
2553
2554
2555         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2556         pkt->nport_handle = prm->cmd->loop_id;
2557         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2558         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2559         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2560         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2561         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2562
2563         /* silence compile warning */
2564         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2565         pkt->ox_id  = cpu_to_le16(t16);
2566
2567         t16 = (atio->u.isp24.attr << 9);
2568         pkt->flags |= cpu_to_le16(t16);
2569         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2570
2571         /* Set transfer direction */
2572         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2573                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2574         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2575                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2576
2577
2578         pkt->dseg_count = prm->tot_dsds;
2579         /* Fibre channel byte count */
2580         pkt->transfer_length = cpu_to_le32(transfer_length);
2581
2582
2583         /* ----- CRC context -------- */
2584
2585         /* Allocate CRC context from global pool */
2586         crc_ctx_pkt = cmd->ctx =
2587             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2588
2589         if (!crc_ctx_pkt)
2590                 goto crc_queuing_error;
2591
2592         /* Zero out CTX area. */
2593         clr_ptr = (uint8_t *)crc_ctx_pkt;
2594         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2595
2596         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2597         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2598
2599         /* Set handle */
2600         crc_ctx_pkt->handle = pkt->handle;
2601
2602         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2603
2604         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2605         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2606         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2607
2608
2609         if (!bundling) {
2610                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2611         } else {
2612                 /*
2613                  * Configure Bundling if we need to fetch interlaving
2614                  * protection PCI accesses
2615                  */
2616                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2617                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2618                 crc_ctx_pkt->u.bundling.dseg_count =
2619                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2620                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2621         }
2622
2623         /* Finish the common fields of CRC pkt */
2624         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2625         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2626         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2627         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2628
2629
2630         /* Walks data segments */
2631         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2632
2633         if (!bundling && prm->prot_seg_cnt) {
2634                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2635                         prm->tot_dsds, cmd))
2636                         goto crc_queuing_error;
2637         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2638                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2639                 goto crc_queuing_error;
2640
2641         if (bundling && prm->prot_seg_cnt) {
2642                 /* Walks dif segments */
2643                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2644
2645                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2646                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2647                         prm->prot_seg_cnt, cmd))
2648                         goto crc_queuing_error;
2649         }
2650         return QLA_SUCCESS;
2651
2652 crc_queuing_error:
2653         /* Cleanup will be performed by the caller */
2654
2655         return QLA_FUNCTION_FAILED;
2656 }
2657
2658
2659 /*
2660  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2661  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2662  */
2663 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2664         uint8_t scsi_status)
2665 {
2666         struct scsi_qla_host *vha = cmd->vha;
2667         struct qla_hw_data *ha = vha->hw;
2668         struct ctio7_to_24xx *pkt;
2669         struct qla_tgt_prm prm;
2670         uint32_t full_req_cnt = 0;
2671         unsigned long flags = 0;
2672         int res;
2673
2674         spin_lock_irqsave(&ha->hardware_lock, flags);
2675         if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2676                 cmd->state = QLA_TGT_STATE_PROCESSED;
2677                 if (cmd->sess->logout_completed)
2678                         /* no need to terminate. FW already freed exchange. */
2679                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2680                 else
2681                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
2682                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2683                 return 0;
2684         }
2685         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2686
2687         memset(&prm, 0, sizeof(prm));
2688         qlt_check_srr_debug(cmd, &xmit_type);
2689
2690         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2691             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2692             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2693             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2694             &cmd->se_cmd);
2695
2696         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2697             &full_req_cnt);
2698         if (unlikely(res != 0)) {
2699                 return res;
2700         }
2701
2702         spin_lock_irqsave(&ha->hardware_lock, flags);
2703
2704         if (xmit_type == QLA_TGT_XMIT_STATUS)
2705                 vha->tgt_counters.core_qla_snd_status++;
2706         else
2707                 vha->tgt_counters.core_qla_que_buf++;
2708
2709         if (!vha->flags.online || cmd->reset_count != ha->chip_reset) {
2710                 /*
2711                  * Either the port is not online or this request was from
2712                  * previous life, just abort the processing.
2713                  */
2714                 cmd->state = QLA_TGT_STATE_PROCESSED;
2715                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2716                 ql_dbg(ql_dbg_async, vha, 0xe101,
2717                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
2718                         vha->flags.online, qla2x00_reset_active(vha),
2719                         cmd->reset_count, ha->chip_reset);
2720                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2721                 return 0;
2722         }
2723
2724         /* Does F/W have an IOCBs for this request */
2725         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2726         if (unlikely(res))
2727                 goto out_unmap_unlock;
2728
2729         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2730                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2731         else
2732                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2733         if (unlikely(res != 0)) {
2734                 vha->req->cnt += full_req_cnt;
2735                 goto out_unmap_unlock;
2736         }
2737
2738         pkt = (struct ctio7_to_24xx *)prm.pkt;
2739
2740         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2741                 pkt->u.status0.flags |=
2742                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2743                         CTIO7_FLAGS_STATUS_MODE_0);
2744
2745                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2746                         qlt_load_data_segments(&prm, vha);
2747
2748                 if (prm.add_status_pkt == 0) {
2749                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2750                                 pkt->u.status0.scsi_status =
2751                                     cpu_to_le16(prm.rq_result);
2752                                 pkt->u.status0.residual =
2753                                     cpu_to_le32(prm.residual);
2754                                 pkt->u.status0.flags |= cpu_to_le16(
2755                                     CTIO7_FLAGS_SEND_STATUS);
2756                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2757                                         pkt->u.status0.flags |=
2758                                             cpu_to_le16(
2759                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2760                                                 CTIO7_FLAGS_CONFORM_REQ);
2761                                 }
2762                         }
2763
2764                 } else {
2765                         /*
2766                          * We have already made sure that there is sufficient
2767                          * amount of request entries to not drop HW lock in
2768                          * req_pkt().
2769                          */
2770                         struct ctio7_to_24xx *ctio =
2771                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2772
2773                         ql_dbg(ql_dbg_io, vha, 0x305e,
2774                             "Building additional status packet 0x%p.\n",
2775                             ctio);
2776
2777                         /*
2778                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2779                          * ctio7_to_24xx
2780                          */
2781                         memcpy(ctio, pkt, sizeof(*ctio));
2782                         /* reset back to CTIO7 */
2783                         ctio->entry_count = 1;
2784                         ctio->entry_type = CTIO_TYPE7;
2785                         ctio->dseg_count = 0;
2786                         ctio->u.status1.flags &= ~cpu_to_le16(
2787                             CTIO7_FLAGS_DATA_IN);
2788
2789                         /* Real finish is ctio_m1's finish */
2790                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2791                         pkt->u.status0.flags |= cpu_to_le16(
2792                             CTIO7_FLAGS_DONT_RET_CTIO);
2793
2794                         /* qlt_24xx_init_ctio_to_isp will correct
2795                          * all neccessary fields that's part of CTIO7.
2796                          * There should be no residual of CTIO-CRC2 data.
2797                          */
2798                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2799                             &prm);
2800                         pr_debug("Status CTIO7: %p\n", ctio);
2801                 }
2802         } else
2803                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2804
2805
2806         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2807         cmd->cmd_sent_to_fw = 1;
2808
2809         /* Memory Barrier */
2810         wmb();
2811         qla2x00_start_iocbs(vha, vha->req);
2812         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2813
2814         return 0;
2815
2816 out_unmap_unlock:
2817         qlt_unmap_sg(vha, cmd);
2818         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2819
2820         return res;
2821 }
2822 EXPORT_SYMBOL(qlt_xmit_response);
2823
2824 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2825 {
2826         struct ctio7_to_24xx *pkt;
2827         struct scsi_qla_host *vha = cmd->vha;
2828         struct qla_hw_data *ha = vha->hw;
2829         struct qla_tgt *tgt = cmd->tgt;
2830         struct qla_tgt_prm prm;
2831         unsigned long flags;
2832         int res = 0;
2833
2834         memset(&prm, 0, sizeof(prm));
2835         prm.cmd = cmd;
2836         prm.tgt = tgt;
2837         prm.sg = NULL;
2838         prm.req_cnt = 1;
2839
2840         /* Send marker if required */
2841         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2842                 return -EIO;
2843
2844         /* Calculate number of entries and segments required */
2845         if (qlt_pci_map_calc_cnt(&prm) != 0)
2846                 return -EAGAIN;
2847
2848         spin_lock_irqsave(&ha->hardware_lock, flags);
2849
2850         if (!vha->flags.online || (cmd->reset_count != ha->chip_reset) ||
2851             (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2852                 /*
2853                  * Either the port is not online or this request was from
2854                  * previous life, just abort the processing.
2855                  */
2856                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2857                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2858                 ql_dbg(ql_dbg_async, vha, 0xe102,
2859                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2860                         vha->flags.online, qla2x00_reset_active(vha),
2861                         cmd->reset_count, ha->chip_reset);
2862                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2863                 return 0;
2864         }
2865
2866         /* Does F/W have an IOCBs for this request */
2867         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2868         if (res != 0)
2869                 goto out_unlock_free_unmap;
2870         if (cmd->se_cmd.prot_op)
2871                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2872         else
2873                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2874
2875         if (unlikely(res != 0)) {
2876                 vha->req->cnt += prm.req_cnt;
2877                 goto out_unlock_free_unmap;
2878         }
2879
2880         pkt = (struct ctio7_to_24xx *)prm.pkt;
2881         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2882             CTIO7_FLAGS_STATUS_MODE_0);
2883
2884         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2885                 qlt_load_data_segments(&prm, vha);
2886
2887         cmd->state = QLA_TGT_STATE_NEED_DATA;
2888         cmd->cmd_sent_to_fw = 1;
2889
2890         /* Memory Barrier */
2891         wmb();
2892         qla2x00_start_iocbs(vha, vha->req);
2893         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2894
2895         return res;
2896
2897 out_unlock_free_unmap:
2898         qlt_unmap_sg(vha, cmd);
2899         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2900
2901         return res;
2902 }
2903 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2904
2905
2906 /*
2907  * Checks the guard or meta-data for the type of error
2908  * detected by the HBA.
2909  */
2910 static inline int
2911 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2912                 struct ctio_crc_from_fw *sts)
2913 {
2914         uint8_t         *ap = &sts->actual_dif[0];
2915         uint8_t         *ep = &sts->expected_dif[0];
2916         uint32_t        e_ref_tag, a_ref_tag;
2917         uint16_t        e_app_tag, a_app_tag;
2918         uint16_t        e_guard, a_guard;
2919         uint64_t        lba = cmd->se_cmd.t_task_lba;
2920
2921         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2922         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2923         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2924
2925         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2926         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2927         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2928
2929         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2930             "iocb(s) %p Returned STATUS.\n", sts);
2931
2932         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2933             "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2934             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2935             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2936
2937         /*
2938          * Ignore sector if:
2939          * For type     3: ref & app tag is all 'f's
2940          * For type 0,1,2: app tag is all 'f's
2941          */
2942         if ((a_app_tag == 0xffff) &&
2943             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2944              (a_ref_tag == 0xffffffff))) {
2945                 uint32_t blocks_done;
2946
2947                 /* 2TB boundary case covered automatically with this */
2948                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2949                 cmd->se_cmd.bad_sector = e_ref_tag;
2950                 cmd->se_cmd.pi_err = 0;
2951                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2952                         "need to return scsi good\n");
2953
2954                 /* Update protection tag */
2955                 if (cmd->prot_sg_cnt) {
2956                         uint32_t i, k = 0, num_ent;
2957                         struct scatterlist *sg, *sgl;
2958
2959
2960                         sgl = cmd->prot_sg;
2961
2962                         /* Patch the corresponding protection tags */
2963                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2964                                 num_ent = sg_dma_len(sg) / 8;
2965                                 if (k + num_ent < blocks_done) {
2966                                         k += num_ent;
2967                                         continue;
2968                                 }
2969                                 k = blocks_done;
2970                                 break;
2971                         }
2972
2973                         if (k != blocks_done) {
2974                                 ql_log(ql_log_warn, vha, 0xf076,
2975                                     "unexpected tag values tag:lba=%u:%llu)\n",
2976                                     e_ref_tag, (unsigned long long)lba);
2977                                 goto out;
2978                         }
2979
2980 #if 0
2981                         struct sd_dif_tuple *spt;
2982                         /* TODO:
2983                          * This section came from initiator. Is it valid here?
2984                          * should ulp be override with actual val???
2985                          */
2986                         spt = page_address(sg_page(sg)) + sg->offset;
2987                         spt += j;
2988
2989                         spt->app_tag = 0xffff;
2990                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2991                                 spt->ref_tag = 0xffffffff;
2992 #endif
2993                 }
2994
2995                 return 0;
2996         }
2997
2998         /* check guard */
2999         if (e_guard != a_guard) {
3000                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
3001                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3002
3003                 ql_log(ql_log_warn, vha, 0xe076,
3004                     "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3005                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3006                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3007                     a_guard, e_guard, cmd);
3008                 goto out;
3009         }
3010
3011         /* check ref tag */
3012         if (e_ref_tag != a_ref_tag) {
3013                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
3014                 cmd->se_cmd.bad_sector = e_ref_tag;
3015
3016                 ql_log(ql_log_warn, vha, 0xe077,
3017                         "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3018                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3019                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3020                         a_guard, e_guard, cmd);
3021                 goto out;
3022         }
3023
3024         /* check appl tag */
3025         if (e_app_tag != a_app_tag) {
3026                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
3027                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
3028
3029                 ql_log(ql_log_warn, vha, 0xe078,
3030                         "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
3031                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
3032                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
3033                         a_guard, e_guard, cmd);
3034                 goto out;
3035         }
3036 out:
3037         return 1;
3038 }
3039
3040
3041 /* If hardware_lock held on entry, might drop it, then reaquire */
3042 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3043 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3044         struct imm_ntfy_from_isp *ntfy)
3045 {
3046         struct nack_to_isp *nack;
3047         struct qla_hw_data *ha = vha->hw;
3048         request_t *pkt;
3049         int ret = 0;
3050
3051         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3052             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3053
3054         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3055         if (pkt == NULL) {
3056                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3057                     "qla_target(%d): %s failed: unable to allocate "
3058                     "request packet\n", vha->vp_idx, __func__);
3059                 return -ENOMEM;
3060         }
3061
3062         pkt->entry_type = NOTIFY_ACK_TYPE;
3063         pkt->entry_count = 1;
3064         pkt->handle = QLA_TGT_SKIP_HANDLE;
3065
3066         nack = (struct nack_to_isp *)pkt;
3067         nack->ox_id = ntfy->ox_id;
3068
3069         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3070         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3071                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3072                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3073         }
3074
3075         /* terminate */
3076         nack->u.isp24.flags |=
3077                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3078
3079         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3080         nack->u.isp24.status = ntfy->u.isp24.status;
3081         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3082         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3083         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3084         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3085         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3086         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3087
3088         qla2x00_start_iocbs(vha, vha->req);
3089         return ret;
3090 }
3091
3092 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3093         struct imm_ntfy_from_isp *imm, int ha_locked)
3094 {
3095         unsigned long flags = 0;
3096         int rc;
3097
3098         if (qlt_issue_marker(vha, ha_locked) < 0)
3099                 return;
3100
3101         if (ha_locked) {
3102                 rc = __qlt_send_term_imm_notif(vha, imm);
3103
3104 #if 0   /* Todo  */
3105                 if (rc == -ENOMEM)
3106                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3107 #else
3108                 if (rc) {
3109                 }
3110 #endif
3111                 goto done;
3112         }
3113
3114         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3115         rc = __qlt_send_term_imm_notif(vha, imm);
3116
3117 #if 0   /* Todo */
3118         if (rc == -ENOMEM)
3119                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3120 #endif
3121
3122 done:
3123         if (!ha_locked)
3124                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3125 }
3126
3127 /* If hardware_lock held on entry, might drop it, then reaquire */
3128 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3129 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
3130         struct qla_tgt_cmd *cmd,
3131         struct atio_from_isp *atio)
3132 {
3133         struct ctio7_to_24xx *ctio24;
3134         struct qla_hw_data *ha = vha->hw;
3135         request_t *pkt;
3136         int ret = 0;
3137         uint16_t temp;
3138
3139         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3140
3141         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
3142         if (pkt == NULL) {
3143                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3144                     "qla_target(%d): %s failed: unable to allocate "
3145                     "request packet\n", vha->vp_idx, __func__);
3146                 return -ENOMEM;
3147         }
3148
3149         if (cmd != NULL) {
3150                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3151                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3152                             "qla_target(%d): Terminating cmd %p with "
3153                             "incorrect state %d\n", vha->vp_idx, cmd,
3154                             cmd->state);
3155                 } else
3156                         ret = 1;
3157         }
3158
3159         vha->tgt_counters.num_term_xchg_sent++;
3160         pkt->entry_count = 1;
3161         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3162
3163         ctio24 = (struct ctio7_to_24xx *)pkt;
3164         ctio24->entry_type = CTIO_TYPE7;
3165         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3166         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3167         ctio24->vp_index = vha->vp_idx;
3168         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3169         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3170         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3171         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3172         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3173             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
3174                 CTIO7_FLAGS_TERMINATE);
3175         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3176         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3177
3178         /* Most likely, it isn't needed */
3179         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3180             &atio->u.isp24.fcp_cmnd.add_cdb[
3181             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3182         if (ctio24->u.status1.residual != 0)
3183                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3184
3185         /* Memory Barrier */
3186         wmb();
3187         qla2x00_start_iocbs(vha, vha->req);
3188         return ret;
3189 }
3190
3191 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3192         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3193         int ul_abort)
3194 {
3195         unsigned long flags = 0;
3196         int rc;
3197
3198         if (qlt_issue_marker(vha, ha_locked) < 0)
3199                 return;
3200
3201         if (ha_locked) {
3202                 rc = __qlt_send_term_exchange(vha, cmd, atio);
3203                 if (rc == -ENOMEM)
3204                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3205                 goto done;
3206         }
3207         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3208         rc = __qlt_send_term_exchange(vha, cmd, atio);
3209         if (rc == -ENOMEM)
3210                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3211
3212 done:
3213         if (cmd && !ul_abort && !cmd->aborted) {
3214                 if (cmd->sg_mapped)
3215                         qlt_unmap_sg(vha, cmd);
3216                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3217         }
3218
3219         if (!ha_locked)
3220                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3221
3222         return;
3223 }
3224
3225 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3226 {
3227         struct list_head free_list;
3228         struct qla_tgt_cmd *cmd, *tcmd;
3229
3230         vha->hw->tgt.leak_exchg_thresh_hold =
3231             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3232
3233         cmd = tcmd = NULL;
3234         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3235                 INIT_LIST_HEAD(&free_list);
3236                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3237
3238                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3239                         list_del(&cmd->cmd_list);
3240                         /* This cmd was never sent to TCM.  There is no need
3241                          * to schedule free or call free_cmd
3242                          */
3243                         qlt_free_cmd(cmd);
3244                         vha->hw->tgt.num_qfull_cmds_alloc--;
3245                 }
3246         }
3247         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3248 }
3249
3250 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3251 {
3252         uint32_t total_leaked;
3253
3254         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3255
3256         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3257             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3258
3259                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3260                     "Chip reset due to exchange starvation: %d/%d.\n",
3261                     total_leaked, vha->hw->cur_fw_xcb_count);
3262
3263                 if (IS_P3P_TYPE(vha->hw))
3264                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3265                 else
3266                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3267                 qla2xxx_wake_dpc(vha);
3268         }
3269
3270 }
3271
3272 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3273 {
3274         struct qla_tgt *tgt = cmd->tgt;
3275         struct scsi_qla_host *vha = tgt->vha;
3276         struct se_cmd *se_cmd = &cmd->se_cmd;
3277         unsigned long flags;
3278
3279         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3280             "qla_target(%d): terminating exchange for aborted cmd=%p "
3281             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3282             se_cmd->tag);
3283
3284         spin_lock_irqsave(&cmd->cmd_lock, flags);
3285         if (cmd->aborted) {
3286                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3287                 /*
3288                  * It's normal to see 2 calls in this path:
3289                  *  1) XFER Rdy completion + CMD_T_ABORT
3290                  *  2) TCM TMR - drain_state_list
3291                  */
3292                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xffff,
3293                         "multiple abort. %p transport_state %x, t_state %x,"
3294                         " se_cmd_flags %x \n", cmd, cmd->se_cmd.transport_state,
3295                         cmd->se_cmd.t_state,cmd->se_cmd.se_cmd_flags);
3296                 return EIO;
3297         }
3298         cmd->aborted = 1;
3299         cmd->cmd_flags |= BIT_6;
3300         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3301
3302         qlt_send_term_exchange(vha, cmd, &cmd->atio, 0, 1);
3303         return 0;
3304 }
3305 EXPORT_SYMBOL(qlt_abort_cmd);
3306
3307 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3308 {
3309         struct qla_tgt_sess *sess = cmd->sess;
3310
3311         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3312             "%s: se_cmd[%p] ox_id %04x\n",
3313             __func__, &cmd->se_cmd,
3314             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3315
3316         BUG_ON(cmd->cmd_in_wq);
3317
3318         if (cmd->sg_mapped)
3319                 qlt_unmap_sg(cmd->vha, cmd);
3320
3321         if (!cmd->q_full)
3322                 qlt_decr_num_pend_cmds(cmd->vha);
3323
3324         BUG_ON(cmd->sg_mapped);
3325         cmd->jiffies_at_free = get_jiffies_64();
3326         if (unlikely(cmd->free_sg))
3327                 kfree(cmd->sg);
3328
3329         if (!sess || !sess->se_sess) {
3330                 WARN_ON(1);
3331                 return;
3332         }
3333         cmd->jiffies_at_free = get_jiffies_64();
3334         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3335 }
3336 EXPORT_SYMBOL(qlt_free_cmd);
3337
3338 /* ha->hardware_lock supposed to be held on entry */
3339 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
3340         struct qla_tgt_cmd *cmd, void *ctio)
3341 {
3342         struct qla_tgt_srr_ctio *sc;
3343         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3344         struct qla_tgt_srr_imm *imm;
3345
3346         tgt->ctio_srr_id++;
3347         cmd->cmd_flags |= BIT_15;
3348
3349         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
3350             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
3351
3352         if (!ctio) {
3353                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
3354                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
3355                     vha->vp_idx);
3356                 return -EINVAL;
3357         }
3358
3359         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
3360         if (sc != NULL) {
3361                 sc->cmd = cmd;
3362                 /* IRQ is already OFF */
3363                 spin_lock(&tgt->srr_lock);
3364                 sc->srr_id = tgt->ctio_srr_id;
3365                 list_add_tail(&sc->srr_list_entry,
3366                     &tgt->srr_ctio_list);
3367                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
3368                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
3369                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3370                         int found = 0;
3371                         list_for_each_entry(imm, &tgt->srr_imm_list,
3372                             srr_list_entry) {
3373                                 if (imm->srr_id == sc->srr_id) {
3374                                         found = 1;
3375                                         break;
3376                                 }
3377                         }
3378                         if (found) {
3379                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
3380                                     "Scheduling srr work\n");
3381                                 schedule_work(&tgt->srr_work);
3382                         } else {
3383                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
3384                                     "qla_target(%d): imm_srr_id "
3385                                     "== ctio_srr_id (%d), but there is no "
3386                                     "corresponding SRR IMM, deleting CTIO "
3387                                     "SRR %p\n", vha->vp_idx,
3388                                     tgt->ctio_srr_id, sc);
3389                                 list_del(&sc->srr_list_entry);
3390                                 spin_unlock(&tgt->srr_lock);
3391
3392                                 kfree(sc);
3393                                 return -EINVAL;
3394                         }
3395                 }
3396                 spin_unlock(&tgt->srr_lock);
3397         } else {
3398                 struct qla_tgt_srr_imm *ti;
3399
3400                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
3401                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
3402                     vha->vp_idx);
3403                 spin_lock(&tgt->srr_lock);
3404                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
3405                     srr_list_entry) {
3406                         if (imm->srr_id == tgt->ctio_srr_id) {
3407                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
3408                                     "IMM SRR %p deleted (id %d)\n",
3409                                     imm, imm->srr_id);
3410                                 list_del(&imm->srr_list_entry);
3411                                 qlt_reject_free_srr_imm(vha, imm, 1);
3412                         }
3413                 }
3414                 spin_unlock(&tgt->srr_lock);
3415
3416                 return -ENOMEM;
3417         }
3418
3419         return 0;
3420 }
3421
3422 /*
3423  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3424  */
3425 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3426         struct qla_tgt_cmd *cmd, uint32_t status)
3427 {
3428         int term = 0;
3429
3430         if (ctio != NULL) {
3431                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3432                 term = !(c->flags &
3433                     cpu_to_le16(OF_TERM_EXCH));
3434         } else
3435                 term = 1;
3436
3437         if (term)
3438                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
3439
3440         return term;
3441 }
3442
3443 /* ha->hardware_lock supposed to be held on entry */
3444 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3445         uint32_t handle)
3446 {
3447         struct qla_hw_data *ha = vha->hw;
3448
3449         handle--;
3450         if (ha->tgt.cmds[handle] != NULL) {
3451                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3452                 ha->tgt.cmds[handle] = NULL;
3453                 return cmd;
3454         } else
3455                 return NULL;
3456 }
3457
3458 /* ha->hardware_lock supposed to be held on entry */
3459 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3460         uint32_t handle, void *ctio)
3461 {
3462         struct qla_tgt_cmd *cmd = NULL;
3463
3464         /* Clear out internal marks */
3465         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3466             CTIO_INTERMEDIATE_HANDLE_MARK);
3467
3468         if (handle != QLA_TGT_NULL_HANDLE) {
3469                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3470                         return NULL;
3471
3472                 /* handle-1 is actually used */
3473                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3474                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3475                             "qla_target(%d): Wrong handle %x received\n",
3476                             vha->vp_idx, handle);
3477                         return NULL;
3478                 }
3479                 cmd = qlt_get_cmd(vha, handle);
3480                 if (unlikely(cmd == NULL)) {
3481                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
3482                             "qla_target(%d): Suspicious: unable to "
3483                             "find the command with handle %x\n", vha->vp_idx,
3484                             handle);
3485                         return NULL;
3486                 }
3487         } else if (ctio != NULL) {
3488                 /* We can't get loop ID from CTIO7 */
3489                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3490                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3491                     "support NULL handles\n", vha->vp_idx);
3492                 return NULL;
3493         }
3494
3495         return cmd;
3496 }
3497
3498 /* hardware_lock should be held by caller. */
3499 static void
3500 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3501 {
3502         struct qla_hw_data *ha = vha->hw;
3503         uint32_t handle;
3504
3505         if (cmd->sg_mapped)
3506                 qlt_unmap_sg(vha, cmd);
3507
3508         handle = qlt_make_handle(vha);
3509
3510         /* TODO: fix debug message type and ids. */
3511         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3512                 ql_dbg(ql_dbg_io, vha, 0xff00,
3513                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3514         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3515                 cmd->write_data_transferred = 0;
3516                 cmd->state = QLA_TGT_STATE_DATA_IN;
3517
3518                 ql_dbg(ql_dbg_io, vha, 0xff01,
3519                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3520
3521                 ha->tgt.tgt_ops->handle_data(cmd);
3522                 return;
3523         } else {
3524                 ql_dbg(ql_dbg_io, vha, 0xff03,
3525                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3526                     cmd->state);
3527                 dump_stack();
3528         }
3529
3530         cmd->cmd_flags |= BIT_17;
3531         ha->tgt.tgt_ops->free_cmd(cmd);
3532 }
3533
3534 void
3535 qlt_host_reset_handler(struct qla_hw_data *ha)
3536 {
3537         struct qla_tgt_cmd *cmd;
3538         unsigned long flags;
3539         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3540         scsi_qla_host_t *vha = NULL;
3541         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3542         uint32_t i;
3543
3544         if (!base_vha->hw->tgt.tgt_ops)
3545                 return;
3546
3547         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3548                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3549                         "Target mode disabled\n");
3550                 return;
3551         }
3552
3553         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3554             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3555             base_vha->dpc_flags);
3556
3557         spin_lock_irqsave(&ha->hardware_lock, flags);
3558         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3559                 cmd = qlt_get_cmd(base_vha, i);
3560                 if (!cmd)
3561                         continue;
3562                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3563                 vha = cmd->vha;
3564                 qlt_abort_cmd_on_host_reset(vha, cmd);
3565         }
3566         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3567 }
3568
3569
3570 /*
3571  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3572  */
3573 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3574         uint32_t status, void *ctio)
3575 {
3576         struct qla_hw_data *ha = vha->hw;
3577         struct se_cmd *se_cmd;
3578         struct qla_tgt_cmd *cmd;
3579
3580         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3581                 /* That could happen only in case of an error/reset/abort */
3582                 if (status != CTIO_SUCCESS) {
3583                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3584                             "Intermediate CTIO received"
3585                             " (status %x)\n", status);
3586                 }
3587                 return;
3588         }
3589
3590         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3591         if (cmd == NULL)
3592                 return;
3593
3594         se_cmd = &cmd->se_cmd;
3595         cmd->cmd_sent_to_fw = 0;
3596
3597         qlt_unmap_sg(vha, cmd);
3598
3599         if (unlikely(status != CTIO_SUCCESS)) {
3600                 switch (status & 0xFFFF) {
3601                 case CTIO_LIP_RESET:
3602                 case CTIO_TARGET_RESET:
3603                 case CTIO_ABORTED:
3604                         /* driver request abort via Terminate exchange */
3605                 case CTIO_TIMEOUT:
3606                 case CTIO_INVALID_RX_ID:
3607                         /* They are OK */
3608                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3609                             "qla_target(%d): CTIO with "
3610                             "status %#x received, state %x, se_cmd %p, "
3611                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3612                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3613                             status, cmd->state, se_cmd);
3614                         break;
3615
3616                 case CTIO_PORT_LOGGED_OUT:
3617                 case CTIO_PORT_UNAVAILABLE:
3618                 {
3619                         int logged_out =
3620                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3621
3622                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3623                             "qla_target(%d): CTIO with %s status %x "
3624                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3625                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3626                             status, cmd->state, se_cmd);
3627
3628                         if (logged_out && cmd->sess) {
3629                                 /*
3630                                  * Session is already logged out, but we need
3631                                  * to notify initiator, who's not aware of this
3632                                  */
3633                                 cmd->sess->logout_on_delete = 0;
3634                                 cmd->sess->send_els_logo = 1;
3635                                 qlt_schedule_sess_for_deletion(cmd->sess, true);
3636                         }
3637                         break;
3638                 }
3639                 case CTIO_SRR_RECEIVED:
3640                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3641                             "qla_target(%d): CTIO with SRR_RECEIVED"
3642                             " status %x received (state %x, se_cmd %p)\n",
3643                             vha->vp_idx, status, cmd->state, se_cmd);
3644                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3645                                 break;
3646                         else
3647                                 return;
3648
3649                 case CTIO_DIF_ERROR: {
3650                         struct ctio_crc_from_fw *crc =
3651                                 (struct ctio_crc_from_fw *)ctio;
3652                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3653                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3654                             vha->vp_idx, status, cmd->state, se_cmd,
3655                             *((u64 *)&crc->actual_dif[0]),
3656                             *((u64 *)&crc->expected_dif[0]));
3657
3658                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3659                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3660                                         /* scsi Write/xfer rdy complete */
3661                                         goto skip_term;
3662                                 } else {
3663                                         /* scsi read/xmit respond complete
3664                                          * call handle dif to send scsi status
3665                                          * rather than terminate exchange.
3666                                          */
3667                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3668                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3669                                         return;
3670                                 }
3671                         } else {
3672                                 /* Need to generate a SCSI good completion.
3673                                  * because FW did not send scsi status.
3674                                  */
3675                                 status = 0;
3676                                 goto skip_term;
3677                         }
3678                         break;
3679                 }
3680                 default:
3681                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3682                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3683                             vha->vp_idx, status, cmd->state, se_cmd);
3684                         break;
3685                 }
3686
3687
3688                 /* "cmd->aborted" means
3689                  * cmd is already aborted/terminated, we don't
3690                  * need to terminate again.  The exchange is already
3691                  * cleaned up/freed at FW level.  Just cleanup at driver
3692                  * level.
3693                  */
3694                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3695                     (!cmd->aborted)) {
3696                         cmd->cmd_flags |= BIT_13;
3697                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3698                                 return;
3699                 }
3700         }
3701 skip_term:
3702
3703         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3704                 cmd->cmd_flags |= BIT_12;
3705         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3706                 cmd->state = QLA_TGT_STATE_DATA_IN;
3707
3708                 if (status == CTIO_SUCCESS)
3709                         cmd->write_data_transferred = 1;
3710
3711                 ha->tgt.tgt_ops->handle_data(cmd);
3712                 return;
3713         } else if (cmd->aborted) {
3714                 cmd->cmd_flags |= BIT_18;
3715                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3716                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3717         } else {
3718                 cmd->cmd_flags |= BIT_19;
3719                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3720                     "qla_target(%d): A command in state (%d) should "
3721                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3722         }
3723
3724         if (unlikely(status != CTIO_SUCCESS) &&
3725                 !cmd->aborted) {
3726                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3727                 dump_stack();
3728         }
3729
3730         ha->tgt.tgt_ops->free_cmd(cmd);
3731 }
3732
3733 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3734         uint8_t task_codes)
3735 {
3736         int fcp_task_attr;
3737
3738         switch (task_codes) {
3739         case ATIO_SIMPLE_QUEUE:
3740                 fcp_task_attr = TCM_SIMPLE_TAG;
3741                 break;
3742         case ATIO_HEAD_OF_QUEUE:
3743                 fcp_task_attr = TCM_HEAD_TAG;
3744                 break;
3745         case ATIO_ORDERED_QUEUE:
3746                 fcp_task_attr = TCM_ORDERED_TAG;
3747                 break;
3748         case ATIO_ACA_QUEUE:
3749                 fcp_task_attr = TCM_ACA_TAG;
3750                 break;
3751         case ATIO_UNTAGGED:
3752                 fcp_task_attr = TCM_SIMPLE_TAG;
3753                 break;
3754         default:
3755                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3756                     "qla_target: unknown task code %x, use ORDERED instead\n",
3757                     task_codes);
3758                 fcp_task_attr = TCM_ORDERED_TAG;
3759                 break;
3760         }
3761
3762         return fcp_task_attr;
3763 }
3764
3765 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3766                                         uint8_t *);
3767 /*
3768  * Process context for I/O path into tcm_qla2xxx code
3769  */
3770 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3771 {
3772         scsi_qla_host_t *vha = cmd->vha;
3773         struct qla_hw_data *ha = vha->hw;
3774         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3775         struct qla_tgt_sess *sess = cmd->sess;
3776         struct atio_from_isp *atio = &cmd->atio;
3777         unsigned char *cdb;
3778         unsigned long flags;
3779         uint32_t data_length;
3780         int ret, fcp_task_attr, data_dir, bidi = 0;
3781
3782         cmd->cmd_in_wq = 0;
3783         cmd->cmd_flags |= BIT_1;
3784         if (tgt->tgt_stop)
3785                 goto out_term;
3786
3787         if (cmd->aborted) {
3788                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3789                     "cmd with tag %u is aborted\n",
3790                     cmd->atio.u.isp24.exchange_addr);
3791                 goto out_term;
3792         }
3793
3794         spin_lock_init(&cmd->cmd_lock);
3795         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3796         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3797         cmd->unpacked_lun = scsilun_to_int(
3798             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3799
3800         if (atio->u.isp24.fcp_cmnd.rddata &&
3801             atio->u.isp24.fcp_cmnd.wrdata) {
3802                 bidi = 1;
3803                 data_dir = DMA_TO_DEVICE;
3804         } else if (atio->u.isp24.fcp_cmnd.rddata)
3805                 data_dir = DMA_FROM_DEVICE;
3806         else if (atio->u.isp24.fcp_cmnd.wrdata)
3807                 data_dir = DMA_TO_DEVICE;
3808         else
3809                 data_dir = DMA_NONE;
3810
3811         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3812             atio->u.isp24.fcp_cmnd.task_attr);
3813         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3814             &atio->u.isp24.fcp_cmnd.add_cdb[
3815             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3816
3817         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3818                                           fcp_task_attr, data_dir, bidi);
3819         if (ret != 0)
3820                 goto out_term;
3821         /*
3822          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3823          */
3824         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3825         qlt_put_sess(sess);
3826         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3827         return;
3828
3829 out_term:
3830         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3831         /*
3832          * cmd has not sent to target yet, so pass NULL as the second
3833          * argument to qlt_send_term_exchange() and free the memory here.
3834          */
3835         cmd->cmd_flags |= BIT_2;
3836         spin_lock_irqsave(&ha->hardware_lock, flags);
3837         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1, 0);
3838
3839         qlt_decr_num_pend_cmds(vha);
3840         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3841         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3842
3843         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
3844         qlt_put_sess(sess);
3845         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
3846 }
3847
3848 static void qlt_do_work(struct work_struct *work)
3849 {
3850         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3851         scsi_qla_host_t *vha = cmd->vha;
3852         unsigned long flags;
3853
3854         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3855         list_del(&cmd->cmd_list);
3856         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3857
3858         __qlt_do_work(cmd);
3859 }
3860
3861 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3862                                        struct qla_tgt_sess *sess,
3863                                        struct atio_from_isp *atio)
3864 {
3865         struct se_session *se_sess = sess->se_sess;
3866         struct qla_tgt_cmd *cmd;
3867         int tag;
3868
3869         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3870         if (tag < 0)
3871                 return NULL;
3872
3873         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3874         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3875
3876         memcpy(&cmd->atio, atio, sizeof(*atio));
3877         cmd->state = QLA_TGT_STATE_NEW;
3878         cmd->tgt = vha->vha_tgt.qla_tgt;
3879         qlt_incr_num_pend_cmds(vha);
3880         cmd->vha = vha;
3881         cmd->se_cmd.map_tag = tag;
3882         cmd->sess = sess;
3883         cmd->loop_id = sess->loop_id;
3884         cmd->conf_compl_supported = sess->conf_compl_supported;
3885
3886         cmd->cmd_flags = 0;
3887         cmd->jiffies_at_alloc = get_jiffies_64();
3888
3889         cmd->reset_count = vha->hw->chip_reset;
3890
3891         return cmd;
3892 }
3893
3894 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3895                           uint16_t);
3896
3897 static void qlt_create_sess_from_atio(struct work_struct *work)
3898 {
3899         struct qla_tgt_sess_op *op = container_of(work,
3900                                         struct qla_tgt_sess_op, work);
3901         scsi_qla_host_t *vha = op->vha;
3902         struct qla_hw_data *ha = vha->hw;
3903         struct qla_tgt_sess *sess;
3904         struct qla_tgt_cmd *cmd;
3905         unsigned long flags;
3906         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3907
3908         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3909         list_del(&op->cmd_list);
3910         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3911
3912         if (op->aborted) {
3913                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3914                     "sess_op with tag %u is aborted\n",
3915                     op->atio.u.isp24.exchange_addr);
3916                 goto out_term;
3917         }
3918
3919         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3920             "qla_target(%d): Unable to find wwn login"
3921             " (s_id %x:%x:%x), trying to create it manually\n",
3922             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3923
3924         if (op->atio.u.raw.entry_count > 1) {
3925                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3926                     "Dropping multy entry atio %p\n", &op->atio);
3927                 goto out_term;
3928         }
3929
3930         sess = qlt_make_local_sess(vha, s_id);
3931         /* sess has an extra creation ref. */
3932
3933         if (!sess)
3934                 goto out_term;
3935         /*
3936          * Now obtain a pre-allocated session tag using the original op->atio
3937          * packet header, and dispatch into __qlt_do_work() using the existing
3938          * process context.
3939          */
3940         cmd = qlt_get_tag(vha, sess, &op->atio);
3941         if (!cmd) {
3942                 spin_lock_irqsave(&ha->hardware_lock, flags);
3943                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3944                 qlt_put_sess(sess);
3945                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3946                 kfree(op);
3947                 return;
3948         }
3949         /*
3950          * __qlt_do_work() will call qlt_put_sess() to release
3951          * the extra reference taken above by qlt_make_local_sess()
3952          */
3953         __qlt_do_work(cmd);
3954         kfree(op);
3955         return;
3956
3957 out_term:
3958         spin_lock_irqsave(&ha->hardware_lock, flags);
3959         qlt_send_term_exchange(vha, NULL, &op->atio, 1, 0);
3960         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3961         kfree(op);
3962
3963 }
3964
3965 /* ha->hardware_lock supposed to be held on entry */
3966 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3967         struct atio_from_isp *atio)
3968 {
3969         struct qla_hw_data *ha = vha->hw;
3970         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3971         struct qla_tgt_sess *sess;
3972         struct qla_tgt_cmd *cmd;
3973
3974         if (unlikely(tgt->tgt_stop)) {
3975                 ql_dbg(ql_dbg_io, vha, 0x3061,
3976                     "New command while device %p is shutting down\n", tgt);
3977                 return -EFAULT;
3978         }
3979
3980         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3981         if (unlikely(!sess)) {
3982                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3983                                                      GFP_ATOMIC);
3984                 if (!op)
3985                         return -ENOMEM;
3986
3987                 memcpy(&op->atio, atio, sizeof(*atio));
3988                 op->vha = vha;
3989
3990                 spin_lock(&vha->cmd_list_lock);
3991                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3992                 spin_unlock(&vha->cmd_list_lock);
3993
3994                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3995                 queue_work(qla_tgt_wq, &op->work);
3996                 return 0;
3997         }
3998
3999         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4000          * session deletion, but it's still in sess_del_work wq */
4001         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
4002                 ql_dbg(ql_dbg_io, vha, 0x3061,
4003                     "New command while old session %p is being deleted\n",
4004                     sess);
4005                 return -EFAULT;
4006         }
4007
4008         /*
4009          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4010          */
4011         kref_get(&sess->sess_kref);
4012
4013         cmd = qlt_get_tag(vha, sess, atio);
4014         if (!cmd) {
4015                 ql_dbg(ql_dbg_io, vha, 0x3062,
4016                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4017                 qlt_put_sess(sess);
4018                 return -ENOMEM;
4019         }
4020
4021         cmd->cmd_in_wq = 1;
4022         cmd->cmd_flags |= BIT_0;
4023         cmd->se_cmd.cpuid = ha->msix_count ?
4024                 ha->tgt.rspq_vector_cpuid : WORK_CPU_UNBOUND;
4025
4026         spin_lock(&vha->cmd_list_lock);
4027         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4028         spin_unlock(&vha->cmd_list_lock);
4029
4030         INIT_WORK(&cmd->work, qlt_do_work);
4031         if (ha->msix_count) {
4032                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4033                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4034                             &cmd->work);
4035                 else
4036                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4037                             &cmd->work);
4038         } else {
4039                 queue_work(qla_tgt_wq, &cmd->work);
4040         }
4041         return 0;
4042
4043 }
4044
4045 /* ha->hardware_lock supposed to be held on entry */
4046 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
4047         int fn, void *iocb, int flags)
4048 {
4049         struct scsi_qla_host *vha = sess->vha;
4050         struct qla_hw_data *ha = vha->hw;
4051         struct qla_tgt_mgmt_cmd *mcmd;
4052         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4053         int res;
4054         uint8_t tmr_func;
4055
4056         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4057         if (!mcmd) {
4058                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4059                     "qla_target(%d): Allocation of management "
4060                     "command failed, some commands and their data could "
4061                     "leak\n", vha->vp_idx);
4062                 return -ENOMEM;
4063         }
4064         memset(mcmd, 0, sizeof(*mcmd));
4065         mcmd->sess = sess;
4066
4067         if (iocb) {
4068                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4069                     sizeof(mcmd->orig_iocb.imm_ntfy));
4070         }
4071         mcmd->tmr_func = fn;
4072         mcmd->flags = flags;
4073         mcmd->reset_count = vha->hw->chip_reset;
4074
4075         switch (fn) {
4076         case QLA_TGT_CLEAR_ACA:
4077                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
4078                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
4079                 tmr_func = TMR_CLEAR_ACA;
4080                 break;
4081
4082         case QLA_TGT_TARGET_RESET:
4083                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
4084                     "qla_target(%d): TARGET_RESET received\n",
4085                     sess->vha->vp_idx);
4086                 tmr_func = TMR_TARGET_WARM_RESET;
4087                 break;
4088
4089         case QLA_TGT_LUN_RESET:
4090                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
4091                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
4092                 tmr_func = TMR_LUN_RESET;
4093                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4094                 break;
4095
4096         case QLA_TGT_CLEAR_TS:
4097                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
4098                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
4099                 tmr_func = TMR_CLEAR_TASK_SET;
4100                 break;
4101
4102         case QLA_TGT_ABORT_TS:
4103                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
4104                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
4105                 tmr_func = TMR_ABORT_TASK_SET;
4106                 break;
4107 #if 0
4108         case QLA_TGT_ABORT_ALL:
4109                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
4110                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
4111                     sess->vha->vp_idx);
4112                 tmr_func = 0;
4113                 break;
4114
4115         case QLA_TGT_ABORT_ALL_SESS:
4116                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
4117                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
4118                     sess->vha->vp_idx);
4119                 tmr_func = 0;
4120                 break;
4121
4122         case QLA_TGT_NEXUS_LOSS_SESS:
4123                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
4124                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
4125                     sess->vha->vp_idx);
4126                 tmr_func = 0;
4127                 break;
4128
4129         case QLA_TGT_NEXUS_LOSS:
4130                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
4131                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
4132                 tmr_func = 0;
4133                 break;
4134 #endif
4135         default:
4136                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
4137                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
4138                     sess->vha->vp_idx, fn);
4139                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4140                 return -ENOSYS;
4141         }
4142
4143         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
4144         if (res != 0) {
4145                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
4146                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
4147                     sess->vha->vp_idx, res);
4148                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4149                 return -EFAULT;
4150         }
4151
4152         return 0;
4153 }
4154
4155 /* ha->hardware_lock supposed to be held on entry */
4156 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4157 {
4158         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4159         struct qla_hw_data *ha = vha->hw;
4160         struct qla_tgt *tgt;
4161         struct qla_tgt_sess *sess;
4162         uint32_t lun, unpacked_lun;
4163         int fn;
4164         unsigned long flags;
4165
4166         tgt = vha->vha_tgt.qla_tgt;
4167
4168         lun = a->u.isp24.fcp_cmnd.lun;
4169         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4170
4171         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4172         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4173             a->u.isp24.fcp_hdr.s_id);
4174         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4175
4176         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4177
4178         if (!sess) {
4179                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
4180                     "qla_target(%d): task mgmt fn 0x%x for "
4181                     "non-existant session\n", vha->vp_idx, fn);
4182                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
4183                     sizeof(struct atio_from_isp));
4184         }
4185
4186         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
4187                 return -EFAULT;
4188
4189         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4190 }
4191
4192 /* ha->hardware_lock supposed to be held on entry */
4193 static int __qlt_abort_task(struct scsi_qla_host *vha,
4194         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
4195 {
4196         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4197         struct qla_hw_data *ha = vha->hw;
4198         struct qla_tgt_mgmt_cmd *mcmd;
4199         uint32_t lun, unpacked_lun;
4200         int rc;
4201
4202         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4203         if (mcmd == NULL) {
4204                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4205                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4206                     vha->vp_idx, __func__);
4207                 return -ENOMEM;
4208         }
4209         memset(mcmd, 0, sizeof(*mcmd));
4210
4211         mcmd->sess = sess;
4212         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4213             sizeof(mcmd->orig_iocb.imm_ntfy));
4214
4215         lun = a->u.isp24.fcp_cmnd.lun;
4216         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4217         mcmd->reset_count = vha->hw->chip_reset;
4218
4219         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
4220             le16_to_cpu(iocb->u.isp2x.seq_id));
4221         if (rc != 0) {
4222                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4223                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4224                     vha->vp_idx, rc);
4225                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4226                 return -EFAULT;
4227         }
4228
4229         return 0;
4230 }
4231
4232 /* ha->hardware_lock supposed to be held on entry */
4233 static int qlt_abort_task(struct scsi_qla_host *vha,
4234         struct imm_ntfy_from_isp *iocb)
4235 {
4236         struct qla_hw_data *ha = vha->hw;
4237         struct qla_tgt_sess *sess;
4238         int loop_id;
4239         unsigned long flags;
4240
4241         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4242
4243         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4244         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4245         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4246
4247         if (sess == NULL) {
4248                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4249                     "qla_target(%d): task abort for unexisting "
4250                     "session\n", vha->vp_idx);
4251                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4252                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4253         }
4254
4255         return __qlt_abort_task(vha, iocb, sess);
4256 }
4257
4258 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4259 {
4260         if (fcport->tgt_session) {
4261                 if (rc != MBS_COMMAND_COMPLETE) {
4262                         ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4263                                 "%s: se_sess %p / sess %p from"
4264                                 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4265                                 " LOGO failed: %#x\n",
4266                                 __func__,
4267                                 fcport->tgt_session->se_sess,
4268                                 fcport->tgt_session,
4269                                 fcport->port_name, fcport->loop_id,
4270                                 fcport->d_id.b.domain, fcport->d_id.b.area,
4271                                 fcport->d_id.b.al_pa, rc);
4272                 }
4273
4274                 fcport->tgt_session->logout_completed = 1;
4275         }
4276 }
4277
4278 /*
4279 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4280 *
4281 * Schedules sessions with matching port_id/loop_id but different wwn for
4282 * deletion. Returns existing session with matching wwn if present.
4283 * Null otherwise.
4284 */
4285 static struct qla_tgt_sess *
4286 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4287     port_id_t port_id, uint16_t loop_id, struct qla_tgt_sess **conflict_sess)
4288 {
4289         struct qla_tgt_sess *sess = NULL, *other_sess;
4290         uint64_t other_wwn;
4291
4292         *conflict_sess = NULL;
4293
4294         list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4295
4296                 other_wwn = wwn_to_u64(other_sess->port_name);
4297
4298                 if (wwn == other_wwn) {
4299                         WARN_ON(sess);
4300                         sess = other_sess;
4301                         continue;
4302                 }
4303
4304                 /* find other sess with nport_id collision */
4305                 if (port_id.b24 == other_sess->s_id.b24) {
4306                         if (loop_id != other_sess->loop_id) {
4307                                 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4308                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4309                                     other_sess, other_sess->loop_id, other_wwn);
4310
4311                                 /*
4312                                  * logout_on_delete is set by default, but another
4313                                  * session that has the same s_id/loop_id combo
4314                                  * might have cleared it when requested this session
4315                                  * deletion, so don't touch it
4316                                  */
4317                                 qlt_schedule_sess_for_deletion(other_sess, true);
4318                         } else {
4319                                 /*
4320                                  * Another wwn used to have our s_id/loop_id
4321                                  * kill the session, but don't free the loop_id
4322                                  */
4323                                 other_sess->keep_nport_handle = 1;
4324                                 *conflict_sess = other_sess;
4325                                 qlt_schedule_sess_for_deletion(other_sess,
4326                                     true);
4327                         }
4328                         continue;
4329                 }
4330
4331                 /* find other sess with nport handle collision */
4332                 if (loop_id == other_sess->loop_id) {
4333                         ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4334                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4335                                other_sess, other_sess->loop_id, other_wwn);
4336
4337                         /* Same loop_id but different s_id
4338                          * Ok to kill and logout */
4339                         qlt_schedule_sess_for_deletion(other_sess, true);
4340                 }
4341         }
4342
4343         return sess;
4344 }
4345
4346 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4347 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4348 {
4349         struct qla_tgt_sess_op *op;
4350         struct qla_tgt_cmd *cmd;
4351         uint32_t key;
4352         int count = 0;
4353
4354         key = (((u32)s_id->b.domain << 16) |
4355                ((u32)s_id->b.area   <<  8) |
4356                ((u32)s_id->b.al_pa));
4357
4358         spin_lock(&vha->cmd_list_lock);
4359         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4360                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4361                 if (op_key == key) {
4362                         op->aborted = true;
4363                         count++;
4364                 }
4365         }
4366         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4367                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4368                 if (cmd_key == key) {
4369                         cmd->aborted = 1;
4370                         count++;
4371                 }
4372         }
4373         spin_unlock(&vha->cmd_list_lock);
4374
4375         return count;
4376 }
4377
4378 /*
4379  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4380  */
4381 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4382         struct imm_ntfy_from_isp *iocb)
4383 {
4384         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4385         struct qla_hw_data *ha = vha->hw;
4386         struct qla_tgt_sess *sess = NULL, *conflict_sess = NULL;
4387         uint64_t wwn;
4388         port_id_t port_id;
4389         uint16_t loop_id;
4390         uint16_t wd3_lo;
4391         int res = 0;
4392         qlt_plogi_ack_t *pla;
4393         unsigned long flags;
4394
4395         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4396
4397         port_id.b.domain = iocb->u.isp24.port_id[2];
4398         port_id.b.area   = iocb->u.isp24.port_id[1];
4399         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4400         port_id.b.rsvd_1 = 0;
4401
4402         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4403
4404         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4405             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4406             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4407
4408         /* res = 1 means ack at the end of thread
4409          * res = 0 means ack async/later.
4410          */
4411         switch (iocb->u.isp24.status_subcode) {
4412         case ELS_PLOGI:
4413
4414                 /* Mark all stale commands in qla_tgt_wq for deletion */
4415                 abort_cmds_for_s_id(vha, &port_id);
4416
4417                 if (wwn) {
4418                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4419                         sess = qlt_find_sess_invalidate_other(tgt, wwn,
4420                             port_id, loop_id, &conflict_sess);
4421                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4422                 }
4423
4424                 if (IS_SW_RESV_ADDR(port_id) || (!sess && !conflict_sess)) {
4425                         res = 1;
4426                         break;
4427                 }
4428
4429                 pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4430                 if (!pla) {
4431                         qlt_send_term_imm_notif(vha, iocb, 1);
4432
4433                         res = 0;
4434                         break;
4435                 }
4436
4437                 res = 0;
4438
4439                 if (conflict_sess)
4440                         qlt_plogi_ack_link(vha, pla, conflict_sess,
4441                             QLT_PLOGI_LINK_CONFLICT);
4442
4443                 if (!sess)
4444                         break;
4445
4446                 qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4447                  /*
4448                   * Under normal circumstances we want to release nport handle
4449                   * during LOGO process to avoid nport handle leaks inside FW.
4450                   * The exception is when LOGO is done while another PLOGI with
4451                   * the same nport handle is waiting as might be the case here.
4452                   * Note: there is always a possibily of a race where session
4453                   * deletion has already started for other reasons (e.g. ACL
4454                   * removal) and now PLOGI arrives:
4455                   * 1. if PLOGI arrived in FW after nport handle has been freed,
4456                   *    FW must have assigned this PLOGI a new/same handle and we
4457                   *    can proceed ACK'ing it as usual when session deletion
4458                   *    completes.
4459                   * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4460                   *    bit reached it, the handle has now been released. We'll
4461                   *    get an error when we ACK this PLOGI. Nothing will be sent
4462                   *    back to initiator. Initiator should eventually retry
4463                   *    PLOGI and situation will correct itself.
4464                   */
4465                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4466                                            (sess->s_id.b24 == port_id.b24));
4467                 qlt_schedule_sess_for_deletion(sess, true);
4468                 break;
4469
4470         case ELS_PRLI:
4471                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4472
4473                 if (wwn) {
4474                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4475                         sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4476                             loop_id, &conflict_sess);
4477                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4478                 }
4479
4480                 if (conflict_sess) {
4481                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4482                             "PRLI with conflicting sess %p port %8phC\n",
4483                             conflict_sess, conflict_sess->port_name);
4484                         qlt_send_term_imm_notif(vha, iocb, 1);
4485                         res = 0;
4486                         break;
4487                 }
4488
4489                 if (sess != NULL) {
4490                         if (sess->deleted) {
4491                                 /*
4492                                  * Impatient initiator sent PRLI before last
4493                                  * PLOGI could finish. Will force him to re-try,
4494                                  * while last one finishes.
4495                                  */
4496                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4497                                     "sess %p PRLI received, before plogi ack.\n",
4498                                     sess);
4499                                 qlt_send_term_imm_notif(vha, iocb, 1);
4500                                 res = 0;
4501                                 break;
4502                         }
4503
4504                         /*
4505                          * This shouldn't happen under normal circumstances,
4506                          * since we have deleted the old session during PLOGI
4507                          */
4508                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4509                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4510                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4511
4512                         sess->local = 0;
4513                         sess->loop_id = loop_id;
4514                         sess->s_id = port_id;
4515
4516                         if (wd3_lo & BIT_7)
4517                                 sess->conf_compl_supported = 1;
4518
4519                 }
4520                 res = 1; /* send notify ack */
4521
4522                 /* Make session global (not used in fabric mode) */
4523                 if (ha->current_topology != ISP_CFG_F) {
4524                         set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4525                         set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4526                         qla2xxx_wake_dpc(vha);
4527                 } else {
4528                         /* todo: else - create sess here. */
4529                         res = 1; /* send notify ack */
4530                 }
4531
4532                 break;
4533
4534         case ELS_LOGO:
4535         case ELS_PRLO:
4536                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4537                 break;
4538         case ELS_PDISC:
4539         case ELS_ADISC:
4540         {
4541                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4542                 if (tgt->link_reinit_iocb_pending) {
4543                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4544                             0, 0, 0, 0, 0, 0);
4545                         tgt->link_reinit_iocb_pending = 0;
4546                 }
4547                 res = 1; /* send notify ack */
4548                 break;
4549         }
4550
4551         case ELS_FLOGI: /* should never happen */
4552         default:
4553                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4554                     "qla_target(%d): Unsupported ELS command %x "
4555                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4556                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4557                 break;
4558         }
4559
4560         return res;
4561 }
4562
4563 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4564 {
4565 #if 1
4566         /*
4567          * FIXME: Reject non zero SRR relative offset until we can test
4568          * this code properly.
4569          */
4570         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4571         return -1;
4572 #else
4573         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4574         size_t first_offset = 0, rem_offset = offset, tmp = 0;
4575         int i, sg_srr_cnt, bufflen = 0;
4576
4577         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4578             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4579             "cmd->sg_cnt: %u, direction: %d\n",
4580             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4581
4582         if (!cmd->sg || !cmd->sg_cnt) {
4583                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4584                     "Missing cmd->sg or zero cmd->sg_cnt in"
4585                     " qla_tgt_set_data_offset\n");
4586                 return -EINVAL;
4587         }
4588         /*
4589          * Walk the current cmd->sg list until we locate the new sg_srr_start
4590          */
4591         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4592                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4593                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4594                     i, sg, sg_page(sg), sg->length, sg->offset);
4595
4596                 if ((sg->length + tmp) > offset) {
4597                         first_offset = rem_offset;
4598                         sg_srr_start = sg;
4599                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4600                             "Found matching sg[%d], using %p as sg_srr_start, "
4601                             "and using first_offset: %zu\n", i, sg,
4602                             first_offset);
4603                         break;
4604                 }
4605                 tmp += sg->length;
4606                 rem_offset -= sg->length;
4607         }
4608
4609         if (!sg_srr_start) {
4610                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4611                     "Unable to locate sg_srr_start for offset: %u\n", offset);
4612                 return -EINVAL;
4613         }
4614         sg_srr_cnt = (cmd->sg_cnt - i);
4615
4616         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4617         if (!sg_srr) {
4618                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4619                     "Unable to allocate sgp\n");
4620                 return -ENOMEM;
4621         }
4622         sg_init_table(sg_srr, sg_srr_cnt);
4623         sgp = &sg_srr[0];
4624         /*
4625          * Walk the remaining list for sg_srr_start, mapping to the newly
4626          * allocated sg_srr taking first_offset into account.
4627          */
4628         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4629                 if (first_offset) {
4630                         sg_set_page(sgp, sg_page(sg),
4631                             (sg->length - first_offset), first_offset);
4632                         first_offset = 0;
4633                 } else {
4634                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
4635                 }
4636                 bufflen += sgp->length;
4637
4638                 sgp = sg_next(sgp);
4639                 if (!sgp)
4640                         break;
4641         }
4642
4643         cmd->sg = sg_srr;
4644         cmd->sg_cnt = sg_srr_cnt;
4645         cmd->bufflen = bufflen;
4646         cmd->offset += offset;
4647         cmd->free_sg = 1;
4648
4649         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4650         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4651             cmd->sg_cnt);
4652         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4653             cmd->bufflen);
4654         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4655             cmd->offset);
4656
4657         if (cmd->sg_cnt < 0)
4658                 BUG();
4659
4660         if (cmd->bufflen < 0)
4661                 BUG();
4662
4663         return 0;
4664 #endif
4665 }
4666
4667 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4668         uint32_t srr_rel_offs, int *xmit_type)
4669 {
4670         int res = 0, rel_offs;
4671
4672         rel_offs = srr_rel_offs - cmd->offset;
4673         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4674             srr_rel_offs, rel_offs);
4675
4676         *xmit_type = QLA_TGT_XMIT_ALL;
4677
4678         if (rel_offs < 0) {
4679                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4680                     "qla_target(%d): SRR rel_offs (%d) < 0",
4681                     cmd->vha->vp_idx, rel_offs);
4682                 res = -1;
4683         } else if (rel_offs == cmd->bufflen)
4684                 *xmit_type = QLA_TGT_XMIT_STATUS;
4685         else if (rel_offs > 0)
4686                 res = qlt_set_data_offset(cmd, rel_offs);
4687
4688         return res;
4689 }
4690
4691 /* No locks, thread context */
4692 static void qlt_handle_srr(struct scsi_qla_host *vha,
4693         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4694 {
4695         struct imm_ntfy_from_isp *ntfy =
4696             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4697         struct qla_hw_data *ha = vha->hw;
4698         struct qla_tgt_cmd *cmd = sctio->cmd;
4699         struct se_cmd *se_cmd = &cmd->se_cmd;
4700         unsigned long flags;
4701         int xmit_type = 0, resp = 0;
4702         uint32_t offset;
4703         uint16_t srr_ui;
4704
4705         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4706         srr_ui = ntfy->u.isp24.srr_ui;
4707
4708         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4709             cmd, srr_ui);
4710
4711         switch (srr_ui) {
4712         case SRR_IU_STATUS:
4713                 spin_lock_irqsave(&ha->hardware_lock, flags);
4714                 qlt_send_notify_ack(vha, ntfy,
4715                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4716                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4717                 xmit_type = QLA_TGT_XMIT_STATUS;
4718                 resp = 1;
4719                 break;
4720         case SRR_IU_DATA_IN:
4721                 if (!cmd->sg || !cmd->sg_cnt) {
4722                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4723                             "Unable to process SRR_IU_DATA_IN due to"
4724                             " missing cmd->sg, state: %d\n", cmd->state);
4725                         dump_stack();
4726                         goto out_reject;
4727                 }
4728                 if (se_cmd->scsi_status != 0) {
4729                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4730                             "Rejecting SRR_IU_DATA_IN with non GOOD "
4731                             "scsi_status\n");
4732                         goto out_reject;
4733                 }
4734                 cmd->bufflen = se_cmd->data_length;
4735
4736                 if (qlt_has_data(cmd)) {
4737                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4738                                 goto out_reject;
4739                         spin_lock_irqsave(&ha->hardware_lock, flags);
4740                         qlt_send_notify_ack(vha, ntfy,
4741                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4742                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4743                         resp = 1;
4744                 } else {
4745                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4746                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4747                                vha->vp_idx, se_cmd->tag,
4748                             cmd->se_cmd.scsi_status);
4749                         goto out_reject;
4750                 }
4751                 break;
4752         case SRR_IU_DATA_OUT:
4753                 if (!cmd->sg || !cmd->sg_cnt) {
4754                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4755                             "Unable to process SRR_IU_DATA_OUT due to"
4756                             " missing cmd->sg\n");
4757                         dump_stack();
4758                         goto out_reject;
4759                 }
4760                 if (se_cmd->scsi_status != 0) {
4761                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4762                             "Rejecting SRR_IU_DATA_OUT"
4763                             " with non GOOD scsi_status\n");
4764                         goto out_reject;
4765                 }
4766                 cmd->bufflen = se_cmd->data_length;
4767
4768                 if (qlt_has_data(cmd)) {
4769                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4770                                 goto out_reject;
4771                         spin_lock_irqsave(&ha->hardware_lock, flags);
4772                         qlt_send_notify_ack(vha, ntfy,
4773                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4774                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4775                         if (xmit_type & QLA_TGT_XMIT_DATA) {
4776                                 cmd->cmd_flags |= BIT_8;
4777                                 qlt_rdy_to_xfer(cmd);
4778                         }
4779                 } else {
4780                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4781                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4782                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4783                         goto out_reject;
4784                 }
4785                 break;
4786         default:
4787                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4788                     "qla_target(%d): Unknown srr_ui value %x",
4789                     vha->vp_idx, srr_ui);
4790                 goto out_reject;
4791         }
4792
4793         /* Transmit response in case of status and data-in cases */
4794         if (resp) {
4795                 cmd->cmd_flags |= BIT_7;
4796                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4797         }
4798
4799         return;
4800
4801 out_reject:
4802         spin_lock_irqsave(&ha->hardware_lock, flags);
4803         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4804             NOTIFY_ACK_SRR_FLAGS_REJECT,
4805             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4806             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4807         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4808                 cmd->state = QLA_TGT_STATE_DATA_IN;
4809                 dump_stack();
4810         } else {
4811                 cmd->cmd_flags |= BIT_9;
4812                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1, 0);
4813         }
4814         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4815 }
4816
4817 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4818         struct qla_tgt_srr_imm *imm, int ha_locked)
4819 {
4820         struct qla_hw_data *ha = vha->hw;
4821         unsigned long flags = 0;
4822
4823 #ifndef __CHECKER__
4824         if (!ha_locked)
4825                 spin_lock_irqsave(&ha->hardware_lock, flags);
4826 #endif
4827
4828         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4829             NOTIFY_ACK_SRR_FLAGS_REJECT,
4830             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4831             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4832
4833 #ifndef __CHECKER__
4834         if (!ha_locked)
4835                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4836 #endif
4837
4838         kfree(imm);
4839 }
4840
4841 static void qlt_handle_srr_work(struct work_struct *work)
4842 {
4843         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4844         struct scsi_qla_host *vha = tgt->vha;
4845         struct qla_tgt_srr_ctio *sctio;
4846         unsigned long flags;
4847
4848         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4849             tgt);
4850
4851 restart:
4852         spin_lock_irqsave(&tgt->srr_lock, flags);
4853         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4854                 struct qla_tgt_srr_imm *imm, *i, *ti;
4855                 struct qla_tgt_cmd *cmd;
4856                 struct se_cmd *se_cmd;
4857
4858                 imm = NULL;
4859                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4860                                                 srr_list_entry) {
4861                         if (i->srr_id == sctio->srr_id) {
4862                                 list_del(&i->srr_list_entry);
4863                                 if (imm) {
4864                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4865                                           "qla_target(%d): There must be "
4866                                           "only one IMM SRR per CTIO SRR "
4867                                           "(IMM SRR %p, id %d, CTIO %p\n",
4868                                           vha->vp_idx, i, i->srr_id, sctio);
4869                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4870                                 } else
4871                                         imm = i;
4872                         }
4873                 }
4874
4875                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4876                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4877                     sctio->srr_id);
4878
4879                 if (imm == NULL) {
4880                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4881                             "Not found matching IMM for SRR CTIO (id %d)\n",
4882                             sctio->srr_id);
4883                         continue;
4884                 } else
4885                         list_del(&sctio->srr_list_entry);
4886
4887                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4888
4889                 cmd = sctio->cmd;
4890                 /*
4891                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4892                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4893                  * logic..
4894                  */
4895                 cmd->offset = 0;
4896                 if (cmd->free_sg) {
4897                         kfree(cmd->sg);
4898                         cmd->sg = NULL;
4899                         cmd->free_sg = 0;
4900                 }
4901                 se_cmd = &cmd->se_cmd;
4902
4903                 cmd->sg_cnt = se_cmd->t_data_nents;
4904                 cmd->sg = se_cmd->t_data_sg;
4905
4906                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4907                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4908                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4909                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4910
4911                 qlt_handle_srr(vha, sctio, imm);
4912
4913                 kfree(imm);
4914                 kfree(sctio);
4915                 goto restart;
4916         }
4917         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4918 }
4919
4920 /* ha->hardware_lock supposed to be held on entry */
4921 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4922         struct imm_ntfy_from_isp *iocb)
4923 {
4924         struct qla_tgt_srr_imm *imm;
4925         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4926         struct qla_tgt_srr_ctio *sctio;
4927
4928         tgt->imm_srr_id++;
4929
4930         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4931             vha->vp_idx);
4932
4933         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4934         if (imm != NULL) {
4935                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4936
4937                 /* IRQ is already OFF */
4938                 spin_lock(&tgt->srr_lock);
4939                 imm->srr_id = tgt->imm_srr_id;
4940                 list_add_tail(&imm->srr_list_entry,
4941                     &tgt->srr_imm_list);
4942                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4943                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4944                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4945                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4946                         int found = 0;
4947                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4948                             srr_list_entry) {
4949                                 if (sctio->srr_id == imm->srr_id) {
4950                                         found = 1;
4951                                         break;
4952                                 }
4953                         }
4954                         if (found) {
4955                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4956                                     "Scheduling srr work\n");
4957                                 schedule_work(&tgt->srr_work);
4958                         } else {
4959                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4960                                     "qla_target(%d): imm_srr_id "
4961                                     "== ctio_srr_id (%d), but there is no "
4962                                     "corresponding SRR CTIO, deleting IMM "
4963                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4964                                     imm);
4965                                 list_del(&imm->srr_list_entry);
4966
4967                                 kfree(imm);
4968
4969                                 spin_unlock(&tgt->srr_lock);
4970                                 goto out_reject;
4971                         }
4972                 }
4973                 spin_unlock(&tgt->srr_lock);
4974         } else {
4975                 struct qla_tgt_srr_ctio *ts;
4976
4977                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4978                     "qla_target(%d): Unable to allocate SRR IMM "
4979                     "entry, SRR request will be rejected\n", vha->vp_idx);
4980
4981                 /* IRQ is already OFF */
4982                 spin_lock(&tgt->srr_lock);
4983                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4984                     srr_list_entry) {
4985                         if (sctio->srr_id == tgt->imm_srr_id) {
4986                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4987                                     "CTIO SRR %p deleted (id %d)\n",
4988                                     sctio, sctio->srr_id);
4989                                 list_del(&sctio->srr_list_entry);
4990                                 qlt_send_term_exchange(vha, sctio->cmd,
4991                                     &sctio->cmd->atio, 1, 0);
4992                                 kfree(sctio);
4993                         }
4994                 }
4995                 spin_unlock(&tgt->srr_lock);
4996                 goto out_reject;
4997         }
4998
4999         return;
5000
5001 out_reject:
5002         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
5003             NOTIFY_ACK_SRR_FLAGS_REJECT,
5004             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
5005             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
5006 }
5007
5008 /*
5009  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5010  */
5011 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5012         struct imm_ntfy_from_isp *iocb)
5013 {
5014         struct qla_hw_data *ha = vha->hw;
5015         uint32_t add_flags = 0;
5016         int send_notify_ack = 1;
5017         uint16_t status;
5018
5019         status = le16_to_cpu(iocb->u.isp2x.status);
5020         switch (status) {
5021         case IMM_NTFY_LIP_RESET:
5022         {
5023                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5024                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5025                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5026                     iocb->u.isp24.status_subcode);
5027
5028                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5029                         send_notify_ack = 0;
5030                 break;
5031         }
5032
5033         case IMM_NTFY_LIP_LINK_REINIT:
5034         {
5035                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5036                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5037                     "qla_target(%d): LINK REINIT (loop %#x, "
5038                     "subcode %x)\n", vha->vp_idx,
5039                     le16_to_cpu(iocb->u.isp24.nport_handle),
5040                     iocb->u.isp24.status_subcode);
5041                 if (tgt->link_reinit_iocb_pending) {
5042                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
5043                             0, 0, 0, 0, 0, 0);
5044                 }
5045                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5046                 tgt->link_reinit_iocb_pending = 1;
5047                 /*
5048                  * QLogic requires to wait after LINK REINIT for possible
5049                  * PDISC or ADISC ELS commands
5050                  */
5051                 send_notify_ack = 0;
5052                 break;
5053         }
5054
5055         case IMM_NTFY_PORT_LOGOUT:
5056                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5057                     "qla_target(%d): Port logout (loop "
5058                     "%#x, subcode %x)\n", vha->vp_idx,
5059                     le16_to_cpu(iocb->u.isp24.nport_handle),
5060                     iocb->u.isp24.status_subcode);
5061
5062                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5063                         send_notify_ack = 0;
5064                 /* The sessions will be cleared in the callback, if needed */
5065                 break;
5066
5067         case IMM_NTFY_GLBL_TPRLO:
5068                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5069                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5070                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5071                         send_notify_ack = 0;
5072                 /* The sessions will be cleared in the callback, if needed */
5073                 break;
5074
5075         case IMM_NTFY_PORT_CONFIG:
5076                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5077                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5078                     status);
5079                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5080                         send_notify_ack = 0;
5081                 /* The sessions will be cleared in the callback, if needed */
5082                 break;
5083
5084         case IMM_NTFY_GLBL_LOGO:
5085                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5086                     "qla_target(%d): Link failure detected\n",
5087                     vha->vp_idx);
5088                 /* I_T nexus loss */
5089                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5090                         send_notify_ack = 0;
5091                 break;
5092
5093         case IMM_NTFY_IOCB_OVERFLOW:
5094                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5095                     "qla_target(%d): Cannot provide requested "
5096                     "capability (IOCB overflowed the immediate notify "
5097                     "resource count)\n", vha->vp_idx);
5098                 break;
5099
5100         case IMM_NTFY_ABORT_TASK:
5101                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5102                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5103                     "L %#x)\n", vha->vp_idx,
5104                     le16_to_cpu(iocb->u.isp2x.seq_id),
5105                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5106                     le16_to_cpu(iocb->u.isp2x.lun));
5107                 if (qlt_abort_task(vha, iocb) == 0)
5108                         send_notify_ack = 0;
5109                 break;
5110
5111         case IMM_NTFY_RESOURCE:
5112                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5113                     "qla_target(%d): Out of resources, host %ld\n",
5114                     vha->vp_idx, vha->host_no);
5115                 break;
5116
5117         case IMM_NTFY_MSG_RX:
5118                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5119                     "qla_target(%d): Immediate notify task %x\n",
5120                     vha->vp_idx, iocb->u.isp2x.task_flags);
5121                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
5122                         send_notify_ack = 0;
5123                 break;
5124
5125         case IMM_NTFY_ELS:
5126                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5127                         send_notify_ack = 0;
5128                 break;
5129
5130         case IMM_NTFY_SRR:
5131                 qlt_prepare_srr_imm(vha, iocb);
5132                 send_notify_ack = 0;
5133                 break;
5134
5135         default:
5136                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5137                     "qla_target(%d): Received unknown immediate "
5138                     "notify status %x\n", vha->vp_idx, status);
5139                 break;
5140         }
5141
5142         if (send_notify_ack)
5143                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
5144 }
5145
5146 /*
5147  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5148  * This function sends busy to ISP 2xxx or 24xx.
5149  */
5150 static int __qlt_send_busy(struct scsi_qla_host *vha,
5151         struct atio_from_isp *atio, uint16_t status)
5152 {
5153         struct ctio7_to_24xx *ctio24;
5154         struct qla_hw_data *ha = vha->hw;
5155         request_t *pkt;
5156         struct qla_tgt_sess *sess = NULL;
5157         unsigned long flags;
5158
5159         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5160         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5161             atio->u.isp24.fcp_hdr.s_id);
5162         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5163         if (!sess) {
5164                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5165                 return 0;
5166         }
5167         /* Sending marker isn't necessary, since we called from ISR */
5168
5169         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
5170         if (!pkt) {
5171                 ql_dbg(ql_dbg_io, vha, 0x3063,
5172                     "qla_target(%d): %s failed: unable to allocate "
5173                     "request packet", vha->vp_idx, __func__);
5174                 return -ENOMEM;
5175         }
5176
5177         vha->tgt_counters.num_q_full_sent++;
5178         pkt->entry_count = 1;
5179         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5180
5181         ctio24 = (struct ctio7_to_24xx *)pkt;
5182         ctio24->entry_type = CTIO_TYPE7;
5183         ctio24->nport_handle = sess->loop_id;
5184         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5185         ctio24->vp_index = vha->vp_idx;
5186         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5187         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5188         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5189         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5190         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
5191             cpu_to_le16(
5192                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5193                 CTIO7_FLAGS_DONT_RET_CTIO);
5194         /*
5195          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5196          * if the explicit conformation is used.
5197          */
5198         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5199         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5200         /* Memory Barrier */
5201         wmb();
5202         qla2x00_start_iocbs(vha, vha->req);
5203         return 0;
5204 }
5205
5206 /*
5207  * This routine is used to allocate a command for either a QFull condition
5208  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5209  * out previously.
5210  */
5211 static void
5212 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5213         struct atio_from_isp *atio, uint16_t status, int qfull)
5214 {
5215         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5216         struct qla_hw_data *ha = vha->hw;
5217         struct qla_tgt_sess *sess;
5218         struct se_session *se_sess;
5219         struct qla_tgt_cmd *cmd;
5220         int tag;
5221
5222         if (unlikely(tgt->tgt_stop)) {
5223                 ql_dbg(ql_dbg_io, vha, 0x300a,
5224                         "New command while device %p is shutting down\n", tgt);
5225                 return;
5226         }
5227
5228         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5229                 vha->hw->tgt.num_qfull_cmds_dropped++;
5230                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5231                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5232                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5233                                 vha->hw->tgt.num_qfull_cmds_dropped;
5234
5235                 ql_dbg(ql_dbg_io, vha, 0x3068,
5236                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5237                         vha->vp_idx, __func__,
5238                         vha->hw->tgt.num_qfull_cmds_dropped);
5239
5240                 qlt_chk_exch_leak_thresh_hold(vha);
5241                 return;
5242         }
5243
5244         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5245                 (vha, atio->u.isp24.fcp_hdr.s_id);
5246         if (!sess)
5247                 return;
5248
5249         se_sess = sess->se_sess;
5250
5251         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5252         if (tag < 0)
5253                 return;
5254
5255         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5256         if (!cmd) {
5257                 ql_dbg(ql_dbg_io, vha, 0x3009,
5258                         "qla_target(%d): %s: Allocation of cmd failed\n",
5259                         vha->vp_idx, __func__);
5260
5261                 vha->hw->tgt.num_qfull_cmds_dropped++;
5262                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5263                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5264                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5265                                 vha->hw->tgt.num_qfull_cmds_dropped;
5266
5267                 qlt_chk_exch_leak_thresh_hold(vha);
5268                 return;
5269         }
5270
5271         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5272
5273         qlt_incr_num_pend_cmds(vha);
5274         INIT_LIST_HEAD(&cmd->cmd_list);
5275         memcpy(&cmd->atio, atio, sizeof(*atio));
5276
5277         cmd->tgt = vha->vha_tgt.qla_tgt;
5278         cmd->vha = vha;
5279         cmd->reset_count = vha->hw->chip_reset;
5280         cmd->q_full = 1;
5281
5282         if (qfull) {
5283                 cmd->q_full = 1;
5284                 /* NOTE: borrowing the state field to carry the status */
5285                 cmd->state = status;
5286         } else
5287                 cmd->term_exchg = 1;
5288
5289         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5290
5291         vha->hw->tgt.num_qfull_cmds_alloc++;
5292         if (vha->hw->tgt.num_qfull_cmds_alloc >
5293                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5294                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5295                         vha->hw->tgt.num_qfull_cmds_alloc;
5296 }
5297
5298 int
5299 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5300 {
5301         struct qla_hw_data *ha = vha->hw;
5302         unsigned long flags;
5303         struct qla_tgt_cmd *cmd, *tcmd;
5304         struct list_head free_list;
5305         int rc = 0;
5306
5307         if (list_empty(&ha->tgt.q_full_list))
5308                 return 0;
5309
5310         INIT_LIST_HEAD(&free_list);
5311
5312         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5313
5314         if (list_empty(&ha->tgt.q_full_list)) {
5315                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5316                 return 0;
5317         }
5318
5319         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5320                 if (cmd->q_full)
5321                         /* cmd->state is a borrowed field to hold status */
5322                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5323                 else if (cmd->term_exchg)
5324                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5325
5326                 if (rc == -ENOMEM)
5327                         break;
5328
5329                 if (cmd->q_full)
5330                         ql_dbg(ql_dbg_io, vha, 0x3006,
5331                             "%s: busy sent for ox_id[%04x]\n", __func__,
5332                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5333                 else if (cmd->term_exchg)
5334                         ql_dbg(ql_dbg_io, vha, 0x3007,
5335                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5336                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5337                 else
5338                         ql_dbg(ql_dbg_io, vha, 0x3008,
5339                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5340                             cmd);
5341
5342                 list_del(&cmd->cmd_list);
5343                 list_add_tail(&cmd->cmd_list, &free_list);
5344
5345                 /* piggy back on hardware_lock for protection */
5346                 vha->hw->tgt.num_qfull_cmds_alloc--;
5347         }
5348         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5349
5350         cmd = NULL;
5351
5352         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5353                 list_del(&cmd->cmd_list);
5354                 /* This cmd was never sent to TCM.  There is no need
5355                  * to schedule free or call free_cmd
5356                  */
5357                 qlt_free_cmd(cmd);
5358         }
5359         return rc;
5360 }
5361
5362 static void
5363 qlt_send_busy(struct scsi_qla_host *vha,
5364         struct atio_from_isp *atio, uint16_t status)
5365 {
5366         int rc = 0;
5367
5368         rc = __qlt_send_busy(vha, atio, status);
5369         if (rc == -ENOMEM)
5370                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5371 }
5372
5373 static int
5374 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5375         struct atio_from_isp *atio)
5376 {
5377         struct qla_hw_data *ha = vha->hw;
5378         uint16_t status;
5379
5380         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5381                 return 0;
5382
5383         status = temp_sam_status;
5384         qlt_send_busy(vha, atio, status);
5385         return 1;
5386 }
5387
5388 /* ha->hardware_lock supposed to be held on entry */
5389 /* called via callback from qla2xxx */
5390 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5391         struct atio_from_isp *atio, uint8_t ha_locked)
5392 {
5393         struct qla_hw_data *ha = vha->hw;
5394         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5395         int rc;
5396         unsigned long flags;
5397
5398         if (unlikely(tgt == NULL)) {
5399                 ql_dbg(ql_dbg_io, vha, 0x3064,
5400                     "ATIO pkt, but no tgt (ha %p)", ha);
5401                 return;
5402         }
5403         /*
5404          * In tgt_stop mode we also should allow all requests to pass.
5405          * Otherwise, some commands can stuck.
5406          */
5407
5408         tgt->atio_irq_cmd_count++;
5409
5410         switch (atio->u.raw.entry_type) {
5411         case ATIO_TYPE7:
5412                 if (unlikely(atio->u.isp24.exchange_addr ==
5413                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5414                         ql_dbg(ql_dbg_io, vha, 0x3065,
5415                             "qla_target(%d): ATIO_TYPE7 "
5416                             "received with UNKNOWN exchange address, "
5417                             "sending QUEUE_FULL\n", vha->vp_idx);
5418                         if (!ha_locked)
5419                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5420                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5421                         if (!ha_locked)
5422                                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5423                         break;
5424                 }
5425
5426
5427
5428                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5429                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
5430                         if (rc != 0) {
5431                                 tgt->atio_irq_cmd_count--;
5432                                 return;
5433                         }
5434                         rc = qlt_handle_cmd_for_atio(vha, atio);
5435                 } else {
5436                         rc = qlt_handle_task_mgmt(vha, atio);
5437                 }
5438                 if (unlikely(rc != 0)) {
5439                         if (rc == -ESRCH) {
5440                                 if (!ha_locked)
5441                                         spin_lock_irqsave
5442                                                 (&ha->hardware_lock, flags);
5443
5444 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5445                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5446 #else
5447                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5448 #endif
5449
5450                                 if (!ha_locked)
5451                                         spin_unlock_irqrestore
5452                                                 (&ha->hardware_lock, flags);
5453
5454                         } else {
5455                                 if (tgt->tgt_stop) {
5456                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5457                                             "qla_target: Unable to send "
5458                                             "command to target for req, "
5459                                             "ignoring.\n");
5460                                 } else {
5461                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5462                                             "qla_target(%d): Unable to send "
5463                                             "command to target, sending BUSY "
5464                                             "status.\n", vha->vp_idx);
5465                                         if (!ha_locked)
5466                                                 spin_lock_irqsave(
5467                                                     &ha->hardware_lock, flags);
5468                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5469                                         if (!ha_locked)
5470                                                 spin_unlock_irqrestore(
5471                                                     &ha->hardware_lock, flags);
5472                                 }
5473                         }
5474                 }
5475                 break;
5476
5477         case IMMED_NOTIFY_TYPE:
5478         {
5479                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5480                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5481                             "qla_target(%d): Received ATIO packet %x "
5482                             "with error status %x\n", vha->vp_idx,
5483                             atio->u.raw.entry_type,
5484                             atio->u.isp2x.entry_status);
5485                         break;
5486                 }
5487                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5488
5489                 if (!ha_locked)
5490                         spin_lock_irqsave(&ha->hardware_lock, flags);
5491                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5492                 if (!ha_locked)
5493                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5494                 break;
5495         }
5496
5497         default:
5498                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5499                     "qla_target(%d): Received unknown ATIO atio "
5500                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5501                 break;
5502         }
5503
5504         tgt->atio_irq_cmd_count--;
5505 }
5506
5507 /* ha->hardware_lock supposed to be held on entry */
5508 /* called via callback from qla2xxx */
5509 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5510 {
5511         struct qla_hw_data *ha = vha->hw;
5512         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5513
5514         if (unlikely(tgt == NULL)) {
5515                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5516                     "qla_target(%d): Response pkt %x received, but no "
5517                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5518                 return;
5519         }
5520
5521         /*
5522          * In tgt_stop mode we also should allow all requests to pass.
5523          * Otherwise, some commands can stuck.
5524          */
5525
5526         tgt->irq_cmd_count++;
5527
5528         switch (pkt->entry_type) {
5529         case CTIO_CRC2:
5530         case CTIO_TYPE7:
5531         {
5532                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5533                 qlt_do_ctio_completion(vha, entry->handle,
5534                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5535                     entry);
5536                 break;
5537         }
5538
5539         case ACCEPT_TGT_IO_TYPE:
5540         {
5541                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5542                 int rc;
5543                 if (atio->u.isp2x.status !=
5544                     cpu_to_le16(ATIO_CDB_VALID)) {
5545                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5546                             "qla_target(%d): ATIO with error "
5547                             "status %x received\n", vha->vp_idx,
5548                             le16_to_cpu(atio->u.isp2x.status));
5549                         break;
5550                 }
5551
5552                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5553                 if (rc != 0) {
5554                         tgt->irq_cmd_count--;
5555                         return;
5556                 }
5557
5558                 rc = qlt_handle_cmd_for_atio(vha, atio);
5559                 if (unlikely(rc != 0)) {
5560                         if (rc == -ESRCH) {
5561 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5562                                 qlt_send_busy(vha, atio, 0);
5563 #else
5564                                 qlt_send_term_exchange(vha, NULL, atio, 1, 0);
5565 #endif
5566                         } else {
5567                                 if (tgt->tgt_stop) {
5568                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5569                                             "qla_target: Unable to send "
5570                                             "command to target, sending TERM "
5571                                             "EXCHANGE for rsp\n");
5572                                         qlt_send_term_exchange(vha, NULL,
5573                                             atio, 1, 0);
5574                                 } else {
5575                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5576                                             "qla_target(%d): Unable to send "
5577                                             "command to target, sending BUSY "
5578                                             "status\n", vha->vp_idx);
5579                                         qlt_send_busy(vha, atio, 0);
5580                                 }
5581                         }
5582                 }
5583         }
5584         break;
5585
5586         case CONTINUE_TGT_IO_TYPE:
5587         {
5588                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5589                 qlt_do_ctio_completion(vha, entry->handle,
5590                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5591                     entry);
5592                 break;
5593         }
5594
5595         case CTIO_A64_TYPE:
5596         {
5597                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5598                 qlt_do_ctio_completion(vha, entry->handle,
5599                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5600                     entry);
5601                 break;
5602         }
5603
5604         case IMMED_NOTIFY_TYPE:
5605                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5606                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5607                 break;
5608
5609         case NOTIFY_ACK_TYPE:
5610                 if (tgt->notify_ack_expected > 0) {
5611                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5612                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5613                             "NOTIFY_ACK seq %08x status %x\n",
5614                             le16_to_cpu(entry->u.isp2x.seq_id),
5615                             le16_to_cpu(entry->u.isp2x.status));
5616                         tgt->notify_ack_expected--;
5617                         if (entry->u.isp2x.status !=
5618                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5619                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5620                                     "qla_target(%d): NOTIFY_ACK "
5621                                     "failed %x\n", vha->vp_idx,
5622                                     le16_to_cpu(entry->u.isp2x.status));
5623                         }
5624                 } else {
5625                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5626                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5627                             vha->vp_idx);
5628                 }
5629                 break;
5630
5631         case ABTS_RECV_24XX:
5632                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5633                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5634                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5635                 break;
5636
5637         case ABTS_RESP_24XX:
5638                 if (tgt->abts_resp_expected > 0) {
5639                         struct abts_resp_from_24xx_fw *entry =
5640                                 (struct abts_resp_from_24xx_fw *)pkt;
5641                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5642                             "ABTS_RESP_24XX: compl_status %x\n",
5643                             entry->compl_status);
5644                         tgt->abts_resp_expected--;
5645                         if (le16_to_cpu(entry->compl_status) !=
5646                             ABTS_RESP_COMPL_SUCCESS) {
5647                                 if ((entry->error_subcode1 == 0x1E) &&
5648                                     (entry->error_subcode2 == 0)) {
5649                                         /*
5650                                          * We've got a race here: aborted
5651                                          * exchange not terminated, i.e.
5652                                          * response for the aborted command was
5653                                          * sent between the abort request was
5654                                          * received and processed.
5655                                          * Unfortunately, the firmware has a
5656                                          * silly requirement that all aborted
5657                                          * exchanges must be explicitely
5658                                          * terminated, otherwise it refuses to
5659                                          * send responses for the abort
5660                                          * requests. So, we have to
5661                                          * (re)terminate the exchange and retry
5662                                          * the abort response.
5663                                          */
5664                                         qlt_24xx_retry_term_exchange(vha,
5665                                             entry);
5666                                 } else
5667                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5668                                             "qla_target(%d): ABTS_RESP_24XX "
5669                                             "failed %x (subcode %x:%x)",
5670                                             vha->vp_idx, entry->compl_status,
5671                                             entry->error_subcode1,
5672                                             entry->error_subcode2);
5673                         }
5674                 } else {
5675                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5676                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5677                             "received\n", vha->vp_idx);
5678                 }
5679                 break;
5680
5681         default:
5682                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5683                     "qla_target(%d): Received unknown response pkt "
5684                     "type %x\n", vha->vp_idx, pkt->entry_type);
5685                 break;
5686         }
5687
5688         tgt->irq_cmd_count--;
5689 }
5690
5691 /*
5692  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5693  */
5694 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5695         uint16_t *mailbox)
5696 {
5697         struct qla_hw_data *ha = vha->hw;
5698         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5699         int login_code;
5700
5701         if (!ha->tgt.tgt_ops)
5702                 return;
5703
5704         if (unlikely(tgt == NULL)) {
5705                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5706                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5707                 return;
5708         }
5709
5710         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5711             IS_QLA2100(ha))
5712                 return;
5713         /*
5714          * In tgt_stop mode we also should allow all requests to pass.
5715          * Otherwise, some commands can stuck.
5716          */
5717
5718         tgt->irq_cmd_count++;
5719
5720         switch (code) {
5721         case MBA_RESET:                 /* Reset */
5722         case MBA_SYSTEM_ERR:            /* System Error */
5723         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5724         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5725                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5726                     "qla_target(%d): System error async event %#x "
5727                     "occurred", vha->vp_idx, code);
5728                 break;
5729         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5730                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5731                 break;
5732
5733         case MBA_LOOP_UP:
5734         {
5735                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5736                     "qla_target(%d): Async LOOP_UP occurred "
5737                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5738                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5739                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5740                 if (tgt->link_reinit_iocb_pending) {
5741                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5742                             0, 0, 0, 0, 0, 0);
5743                         tgt->link_reinit_iocb_pending = 0;
5744                 }
5745                 break;
5746         }
5747
5748         case MBA_LIP_OCCURRED:
5749         case MBA_LOOP_DOWN:
5750         case MBA_LIP_RESET:
5751         case MBA_RSCN_UPDATE:
5752                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5753                     "qla_target(%d): Async event %#x occurred "
5754                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5755                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5756                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5757                 break;
5758
5759         case MBA_PORT_UPDATE:
5760                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5761                     "qla_target(%d): Port update async event %#x "
5762                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5763                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5764                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5765                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5766
5767                 login_code = le16_to_cpu(mailbox[2]);
5768                 if (login_code == 0x4)
5769                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5770                             "Async MB 2: Got PLOGI Complete\n");
5771                 else if (login_code == 0x7)
5772                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5773                             "Async MB 2: Port Logged Out\n");
5774                 break;
5775
5776         default:
5777                 break;
5778         }
5779
5780         tgt->irq_cmd_count--;
5781 }
5782
5783 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5784         uint16_t loop_id)
5785 {
5786         fc_port_t *fcport;
5787         int rc;
5788
5789         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5790         if (!fcport) {
5791                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5792                     "qla_target(%d): Allocation of tmp FC port failed",
5793                     vha->vp_idx);
5794                 return NULL;
5795         }
5796
5797         fcport->loop_id = loop_id;
5798
5799         rc = qla2x00_get_port_database(vha, fcport, 0);
5800         if (rc != QLA_SUCCESS) {
5801                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5802                     "qla_target(%d): Failed to retrieve fcport "
5803                     "information -- get_port_database() returned %x "
5804                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5805                 kfree(fcport);
5806                 return NULL;
5807         }
5808
5809         return fcport;
5810 }
5811
5812 /* Must be called under tgt_mutex */
5813 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5814         uint8_t *s_id)
5815 {
5816         struct qla_tgt_sess *sess = NULL;
5817         fc_port_t *fcport = NULL;
5818         int rc, global_resets;
5819         uint16_t loop_id = 0;
5820
5821         mutex_lock(&vha->vha_tgt.tgt_mutex);
5822
5823 retry:
5824         global_resets =
5825             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5826
5827         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5828         if (rc != 0) {
5829                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5830
5831                 if ((s_id[0] == 0xFF) &&
5832                     (s_id[1] == 0xFC)) {
5833                         /*
5834                          * This is Domain Controller, so it should be
5835                          * OK to drop SCSI commands from it.
5836                          */
5837                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5838                             "Unable to find initiator with S_ID %x:%x:%x",
5839                             s_id[0], s_id[1], s_id[2]);
5840                 } else
5841                         ql_log(ql_log_info, vha, 0xf071,
5842                             "qla_target(%d): Unable to find "
5843                             "initiator with S_ID %x:%x:%x",
5844                             vha->vp_idx, s_id[0], s_id[1],
5845                             s_id[2]);
5846
5847                 if (rc == -ENOENT) {
5848                         qlt_port_logo_t logo;
5849                         sid_to_portid(s_id, &logo.id);
5850                         logo.cmd_count = 1;
5851                         qlt_send_first_logo(vha, &logo);
5852                 }
5853
5854                 return NULL;
5855         }
5856
5857         fcport = qlt_get_port_database(vha, loop_id);
5858         if (!fcport) {
5859                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5860                 return NULL;
5861         }
5862
5863         if (global_resets !=
5864             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5865                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5866                     "qla_target(%d): global reset during session discovery "
5867                     "(counter was %d, new %d), retrying", vha->vp_idx,
5868                     global_resets,
5869                     atomic_read(&vha->vha_tgt.
5870                         qla_tgt->tgt_global_resets_count));
5871                 goto retry;
5872         }
5873
5874         sess = qlt_create_sess(vha, fcport, true);
5875
5876         mutex_unlock(&vha->vha_tgt.tgt_mutex);
5877
5878         kfree(fcport);
5879         return sess;
5880 }
5881
5882 static void qlt_abort_work(struct qla_tgt *tgt,
5883         struct qla_tgt_sess_work_param *prm)
5884 {
5885         struct scsi_qla_host *vha = tgt->vha;
5886         struct qla_hw_data *ha = vha->hw;
5887         struct qla_tgt_sess *sess = NULL;
5888         unsigned long flags = 0, flags2 = 0;
5889         uint32_t be_s_id;
5890         uint8_t s_id[3];
5891         int rc;
5892
5893         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5894
5895         if (tgt->tgt_stop)
5896                 goto out_term2;
5897
5898         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5899         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5900         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5901
5902         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5903             (unsigned char *)&be_s_id);
5904         if (!sess) {
5905                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5906
5907                 sess = qlt_make_local_sess(vha, s_id);
5908                 /* sess has got an extra creation ref */
5909
5910                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
5911                 if (!sess)
5912                         goto out_term2;
5913         } else {
5914                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5915                         sess = NULL;
5916                         goto out_term2;
5917                 }
5918
5919                 kref_get(&sess->sess_kref);
5920         }
5921
5922         spin_lock_irqsave(&ha->hardware_lock, flags);
5923
5924         if (tgt->tgt_stop)
5925                 goto out_term;
5926
5927         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5928         if (rc != 0)
5929                 goto out_term;
5930         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5931
5932         qlt_put_sess(sess);
5933         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5934         return;
5935
5936 out_term2:
5937         spin_lock_irqsave(&ha->hardware_lock, flags);
5938
5939 out_term:
5940         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5941         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5942
5943         qlt_put_sess(sess);
5944         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
5945 }
5946
5947 static void qlt_tmr_work(struct qla_tgt *tgt,
5948         struct qla_tgt_sess_work_param *prm)
5949 {
5950         struct atio_from_isp *a = &prm->tm_iocb2;
5951         struct scsi_qla_host *vha = tgt->vha;
5952         struct qla_hw_data *ha = vha->hw;
5953         struct qla_tgt_sess *sess = NULL;
5954         unsigned long flags;
5955         uint8_t *s_id = NULL; /* to hide compiler warnings */
5956         int rc;
5957         uint32_t lun, unpacked_lun;
5958         int fn;
5959         void *iocb;
5960
5961         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5962
5963         if (tgt->tgt_stop)
5964                 goto out_term;
5965
5966         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5967         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5968         if (!sess) {
5969                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5970
5971                 sess = qlt_make_local_sess(vha, s_id);
5972                 /* sess has got an extra creation ref */
5973
5974                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5975                 if (!sess)
5976                         goto out_term;
5977         } else {
5978                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5979                         sess = NULL;
5980                         goto out_term;
5981                 }
5982
5983                 kref_get(&sess->sess_kref);
5984         }
5985
5986         iocb = a;
5987         lun = a->u.isp24.fcp_cmnd.lun;
5988         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5989         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5990
5991         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5992         if (rc != 0)
5993                 goto out_term;
5994
5995         qlt_put_sess(sess);
5996         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5997         return;
5998
5999 out_term:
6000         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1, 0);
6001         qlt_put_sess(sess);
6002         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6003 }
6004
6005 static void qlt_sess_work_fn(struct work_struct *work)
6006 {
6007         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6008         struct scsi_qla_host *vha = tgt->vha;
6009         unsigned long flags;
6010
6011         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6012
6013         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6014         while (!list_empty(&tgt->sess_works_list)) {
6015                 struct qla_tgt_sess_work_param *prm = list_entry(
6016                     tgt->sess_works_list.next, typeof(*prm),
6017                     sess_works_list_entry);
6018
6019                 /*
6020                  * This work can be scheduled on several CPUs at time, so we
6021                  * must delete the entry to eliminate double processing
6022                  */
6023                 list_del(&prm->sess_works_list_entry);
6024
6025                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6026
6027                 switch (prm->type) {
6028                 case QLA_TGT_SESS_WORK_ABORT:
6029                         qlt_abort_work(tgt, prm);
6030                         break;
6031                 case QLA_TGT_SESS_WORK_TM:
6032                         qlt_tmr_work(tgt, prm);
6033                         break;
6034                 default:
6035                         BUG_ON(1);
6036                         break;
6037                 }
6038
6039                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6040
6041                 kfree(prm);
6042         }
6043         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6044 }
6045
6046 /* Must be called under tgt_host_action_mutex */
6047 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6048 {
6049         struct qla_tgt *tgt;
6050
6051         if (!QLA_TGT_MODE_ENABLED())
6052                 return 0;
6053
6054         if (!IS_TGT_MODE_CAPABLE(ha)) {
6055                 ql_log(ql_log_warn, base_vha, 0xe070,
6056                     "This adapter does not support target mode.\n");
6057                 return 0;
6058         }
6059
6060         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6061             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6062
6063         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6064
6065         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6066         if (!tgt) {
6067                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6068                     "Unable to allocate struct qla_tgt\n");
6069                 return -ENOMEM;
6070         }
6071
6072         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6073                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6074
6075         tgt->ha = ha;
6076         tgt->vha = base_vha;
6077         init_waitqueue_head(&tgt->waitQ);
6078         INIT_LIST_HEAD(&tgt->sess_list);
6079         INIT_LIST_HEAD(&tgt->del_sess_list);
6080         INIT_DELAYED_WORK(&tgt->sess_del_work,
6081                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
6082         spin_lock_init(&tgt->sess_work_lock);
6083         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6084         INIT_LIST_HEAD(&tgt->sess_works_list);
6085         spin_lock_init(&tgt->srr_lock);
6086         INIT_LIST_HEAD(&tgt->srr_ctio_list);
6087         INIT_LIST_HEAD(&tgt->srr_imm_list);
6088         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
6089         atomic_set(&tgt->tgt_global_resets_count, 0);
6090
6091         base_vha->vha_tgt.qla_tgt = tgt;
6092
6093         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6094                 "qla_target(%d): using 64 Bit PCI addressing",
6095                 base_vha->vp_idx);
6096         tgt->tgt_enable_64bit_addr = 1;
6097         /* 3 is reserved */
6098         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6099         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
6100         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
6101
6102         if (base_vha->fc_vport)
6103                 return 0;
6104
6105         mutex_lock(&qla_tgt_mutex);
6106         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6107         mutex_unlock(&qla_tgt_mutex);
6108
6109         return 0;
6110 }
6111
6112 /* Must be called under tgt_host_action_mutex */
6113 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6114 {
6115         if (!vha->vha_tgt.qla_tgt)
6116                 return 0;
6117
6118         if (vha->fc_vport) {
6119                 qlt_release(vha->vha_tgt.qla_tgt);
6120                 return 0;
6121         }
6122
6123         /* free left over qfull cmds */
6124         qlt_init_term_exchange(vha);
6125
6126         mutex_lock(&qla_tgt_mutex);
6127         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
6128         mutex_unlock(&qla_tgt_mutex);
6129
6130         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6131             vha->host_no, ha);
6132         qlt_release(vha->vha_tgt.qla_tgt);
6133
6134         return 0;
6135 }
6136
6137 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6138         unsigned char *b)
6139 {
6140         int i;
6141
6142         pr_debug("qla2xxx HW vha->node_name: ");
6143         for (i = 0; i < WWN_SIZE; i++)
6144                 pr_debug("%02x ", vha->node_name[i]);
6145         pr_debug("\n");
6146         pr_debug("qla2xxx HW vha->port_name: ");
6147         for (i = 0; i < WWN_SIZE; i++)
6148                 pr_debug("%02x ", vha->port_name[i]);
6149         pr_debug("\n");
6150
6151         pr_debug("qla2xxx passed configfs WWPN: ");
6152         put_unaligned_be64(wwpn, b);
6153         for (i = 0; i < WWN_SIZE; i++)
6154                 pr_debug("%02x ", b[i]);
6155         pr_debug("\n");
6156 }
6157
6158 /**
6159  * qla_tgt_lport_register - register lport with external module
6160  *
6161  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
6162  * @wwpn: Passwd FC target WWPN
6163  * @callback:  lport initialization callback for tcm_qla2xxx code
6164  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6165  */
6166 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6167                        u64 npiv_wwpn, u64 npiv_wwnn,
6168                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6169 {
6170         struct qla_tgt *tgt;
6171         struct scsi_qla_host *vha;
6172         struct qla_hw_data *ha;
6173         struct Scsi_Host *host;
6174         unsigned long flags;
6175         int rc;
6176         u8 b[WWN_SIZE];
6177
6178         mutex_lock(&qla_tgt_mutex);
6179         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6180                 vha = tgt->vha;
6181                 ha = vha->hw;
6182
6183                 host = vha->host;
6184                 if (!host)
6185                         continue;
6186
6187                 if (!(host->hostt->supported_mode & MODE_TARGET))
6188                         continue;
6189
6190                 spin_lock_irqsave(&ha->hardware_lock, flags);
6191                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6192                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6193                             host->host_no);
6194                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6195                         continue;
6196                 }
6197                 if (tgt->tgt_stop) {
6198                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6199                                  host->host_no);
6200                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6201                         continue;
6202                 }
6203                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6204
6205                 if (!scsi_host_get(host)) {
6206                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6207                             "Unable to scsi_host_get() for"
6208                             " qla2xxx scsi_host\n");
6209                         continue;
6210                 }
6211                 qlt_lport_dump(vha, phys_wwpn, b);
6212
6213                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6214                         scsi_host_put(host);
6215                         continue;
6216                 }
6217                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6218                 if (rc != 0)
6219                         scsi_host_put(host);
6220
6221                 mutex_unlock(&qla_tgt_mutex);
6222                 return rc;
6223         }
6224         mutex_unlock(&qla_tgt_mutex);
6225
6226         return -ENODEV;
6227 }
6228 EXPORT_SYMBOL(qlt_lport_register);
6229
6230 /**
6231  * qla_tgt_lport_deregister - Degister lport
6232  *
6233  * @vha:  Registered scsi_qla_host pointer
6234  */
6235 void qlt_lport_deregister(struct scsi_qla_host *vha)
6236 {
6237         struct qla_hw_data *ha = vha->hw;
6238         struct Scsi_Host *sh = vha->host;
6239         /*
6240          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6241          */
6242         vha->vha_tgt.target_lport_ptr = NULL;
6243         ha->tgt.tgt_ops = NULL;
6244         /*
6245          * Release the Scsi_Host reference for the underlying qla2xxx host
6246          */
6247         scsi_host_put(sh);
6248 }
6249 EXPORT_SYMBOL(qlt_lport_deregister);
6250
6251 /* Must be called under HW lock */
6252 static void qlt_set_mode(struct scsi_qla_host *vha)
6253 {
6254         struct qla_hw_data *ha = vha->hw;
6255
6256         switch (ql2x_ini_mode) {
6257         case QLA2XXX_INI_MODE_DISABLED:
6258         case QLA2XXX_INI_MODE_EXCLUSIVE:
6259                 vha->host->active_mode = MODE_TARGET;
6260                 break;
6261         case QLA2XXX_INI_MODE_ENABLED:
6262                 vha->host->active_mode |= MODE_TARGET;
6263                 break;
6264         default:
6265                 break;
6266         }
6267
6268         if (ha->tgt.ini_mode_force_reverse)
6269                 qla_reverse_ini_mode(vha);
6270 }
6271
6272 /* Must be called under HW lock */
6273 static void qlt_clear_mode(struct scsi_qla_host *vha)
6274 {
6275         struct qla_hw_data *ha = vha->hw;
6276
6277         switch (ql2x_ini_mode) {
6278         case QLA2XXX_INI_MODE_DISABLED:
6279                 vha->host->active_mode = MODE_UNKNOWN;
6280                 break;
6281         case QLA2XXX_INI_MODE_EXCLUSIVE:
6282                 vha->host->active_mode = MODE_INITIATOR;
6283                 break;
6284         case QLA2XXX_INI_MODE_ENABLED:
6285                 vha->host->active_mode &= ~MODE_TARGET;
6286                 break;
6287         default:
6288                 break;
6289         }
6290
6291         if (ha->tgt.ini_mode_force_reverse)
6292                 qla_reverse_ini_mode(vha);
6293 }
6294
6295 /*
6296  * qla_tgt_enable_vha - NO LOCK HELD
6297  *
6298  * host_reset, bring up w/ Target Mode Enabled
6299  */
6300 void
6301 qlt_enable_vha(struct scsi_qla_host *vha)
6302 {
6303         struct qla_hw_data *ha = vha->hw;
6304         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6305         unsigned long flags;
6306         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6307         int rspq_ent = QLA83XX_RSPQ_MSIX_ENTRY_NUMBER;
6308
6309         if (!tgt) {
6310                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6311                     "Unable to locate qla_tgt pointer from"
6312                     " struct qla_hw_data\n");
6313                 dump_stack();
6314                 return;
6315         }
6316
6317         spin_lock_irqsave(&ha->hardware_lock, flags);
6318         tgt->tgt_stopped = 0;
6319         qlt_set_mode(vha);
6320         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6321
6322         if (vha->vp_idx) {
6323                 qla24xx_disable_vp(vha);
6324                 qla24xx_enable_vp(vha);
6325         } else {
6326                 if (ha->msix_entries) {
6327                         ql_dbg(ql_dbg_tgt, vha, 0xffff,
6328                             "%s: host%ld : vector %d cpu %d\n",
6329                             __func__, vha->host_no,
6330                             ha->msix_entries[rspq_ent].vector,
6331                             ha->msix_entries[rspq_ent].cpuid);
6332
6333                         ha->tgt.rspq_vector_cpuid =
6334                             ha->msix_entries[rspq_ent].cpuid;
6335                 }
6336
6337                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6338                 qla2xxx_wake_dpc(base_vha);
6339                 qla2x00_wait_for_hba_online(base_vha);
6340         }
6341 }
6342 EXPORT_SYMBOL(qlt_enable_vha);
6343
6344 /*
6345  * qla_tgt_disable_vha - NO LOCK HELD
6346  *
6347  * Disable Target Mode and reset the adapter
6348  */
6349 static void qlt_disable_vha(struct scsi_qla_host *vha)
6350 {
6351         struct qla_hw_data *ha = vha->hw;
6352         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6353         unsigned long flags;
6354
6355         if (!tgt) {
6356                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6357                     "Unable to locate qla_tgt pointer from"
6358                     " struct qla_hw_data\n");
6359                 dump_stack();
6360                 return;
6361         }
6362
6363         spin_lock_irqsave(&ha->hardware_lock, flags);
6364         qlt_clear_mode(vha);
6365         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6366
6367         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6368         qla2xxx_wake_dpc(vha);
6369         qla2x00_wait_for_hba_online(vha);
6370 }
6371
6372 /*
6373  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6374  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6375  * members.
6376  */
6377 void
6378 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6379 {
6380         if (!qla_tgt_mode_enabled(vha))
6381                 return;
6382
6383         vha->vha_tgt.qla_tgt = NULL;
6384
6385         mutex_init(&vha->vha_tgt.tgt_mutex);
6386         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6387
6388         qlt_clear_mode(vha);
6389
6390         /*
6391          * NOTE: Currently the value is kept the same for <24xx and
6392          * >=24xx ISPs. If it is necessary to change it,
6393          * the check should be added for specific ISPs,
6394          * assigning the value appropriately.
6395          */
6396         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6397
6398         qlt_add_target(ha, vha);
6399 }
6400
6401 void
6402 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6403 {
6404         /*
6405          * FC-4 Feature bit 0 indicates target functionality to the name server.
6406          */
6407         if (qla_tgt_mode_enabled(vha)) {
6408                 if (qla_ini_mode_enabled(vha))
6409                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6410                 else
6411                         ct_req->req.rff_id.fc4_feature = BIT_0;
6412         } else if (qla_ini_mode_enabled(vha)) {
6413                 ct_req->req.rff_id.fc4_feature = BIT_1;
6414         }
6415 }
6416
6417 /*
6418  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6419  * @ha: HA context
6420  *
6421  * Beginning of ATIO ring has initialization control block already built
6422  * by nvram config routine.
6423  *
6424  * Returns 0 on success.
6425  */
6426 void
6427 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6428 {
6429         struct qla_hw_data *ha = vha->hw;
6430         uint16_t cnt;
6431         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6432
6433         if (!qla_tgt_mode_enabled(vha))
6434                 return;
6435
6436         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6437                 pkt->u.raw.signature = ATIO_PROCESSED;
6438                 pkt++;
6439         }
6440
6441 }
6442
6443 /*
6444  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6445  * @ha: SCSI driver HA context
6446  */
6447 void
6448 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6449 {
6450         struct qla_hw_data *ha = vha->hw;
6451         struct atio_from_isp *pkt;
6452         int cnt, i;
6453
6454         if (!vha->flags.online)
6455                 return;
6456
6457         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6458             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6459                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6460                 cnt = pkt->u.raw.entry_count;
6461
6462                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6463                         /*
6464                          * This packet is corrupted. The header + payload
6465                          * can not be trusted. There is no point in passing
6466                          * it further up.
6467                          */
6468                         ql_log(ql_log_warn, vha, 0xffff,
6469                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6470                             pkt->u.isp24.fcp_hdr.s_id,
6471                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6472                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6473
6474                         adjust_corrupted_atio(pkt);
6475                         qlt_send_term_exchange(vha, NULL, pkt, ha_locked, 0);
6476                 } else {
6477                         qlt_24xx_atio_pkt_all_vps(vha,
6478                             (struct atio_from_isp *)pkt, ha_locked);
6479                 }
6480
6481                 for (i = 0; i < cnt; i++) {
6482                         ha->tgt.atio_ring_index++;
6483                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6484                                 ha->tgt.atio_ring_index = 0;
6485                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6486                         } else
6487                                 ha->tgt.atio_ring_ptr++;
6488
6489                         pkt->u.raw.signature = ATIO_PROCESSED;
6490                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6491                 }
6492                 wmb();
6493         }
6494
6495         /* Adjust ring index */
6496         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6497         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6498 }
6499
6500 void
6501 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6502 {
6503         struct qla_hw_data *ha = vha->hw;
6504         if (!QLA_TGT_MODE_ENABLED())
6505                 return;
6506
6507         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6508         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6509         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6510
6511         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6512                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6513                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6514
6515                 icb->msix_atio = cpu_to_le16(msix->entry);
6516                 ql_dbg(ql_dbg_init, vha, 0xf072,
6517                     "Registering ICB vector 0x%x for atio que.\n",
6518                     msix->entry);
6519         }
6520 }
6521
6522 void
6523 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6524 {
6525         struct qla_hw_data *ha = vha->hw;
6526
6527         if (qla_tgt_mode_enabled(vha)) {
6528                 if (!ha->tgt.saved_set) {
6529                         /* We save only once */
6530                         ha->tgt.saved_exchange_count = nv->exchange_count;
6531                         ha->tgt.saved_firmware_options_1 =
6532                             nv->firmware_options_1;
6533                         ha->tgt.saved_firmware_options_2 =
6534                             nv->firmware_options_2;
6535                         ha->tgt.saved_firmware_options_3 =
6536                             nv->firmware_options_3;
6537                         ha->tgt.saved_set = 1;
6538                 }
6539
6540                 nv->exchange_count = cpu_to_le16(0xFFFF);
6541
6542                 /* Enable target mode */
6543                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6544
6545                 /* Disable ini mode, if requested */
6546                 if (!qla_ini_mode_enabled(vha))
6547                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6548
6549                 /* Disable Full Login after LIP */
6550                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6551                 /* Enable initial LIP */
6552                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6553                 if (ql2xtgt_tape_enable)
6554                         /* Enable FC Tape support */
6555                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6556                 else
6557                         /* Disable FC Tape support */
6558                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6559
6560                 /* Disable Full Login after LIP */
6561                 nv->host_p &= cpu_to_le32(~BIT_10);
6562
6563                 /*
6564                  * clear BIT 15 explicitly as we have seen at least
6565                  * a couple of instances where this was set and this
6566                  * was causing the firmware to not be initialized.
6567                  */
6568                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6569                 /* Enable target PRLI control */
6570                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6571         } else {
6572                 if (ha->tgt.saved_set) {
6573                         nv->exchange_count = ha->tgt.saved_exchange_count;
6574                         nv->firmware_options_1 =
6575                             ha->tgt.saved_firmware_options_1;
6576                         nv->firmware_options_2 =
6577                             ha->tgt.saved_firmware_options_2;
6578                         nv->firmware_options_3 =
6579                             ha->tgt.saved_firmware_options_3;
6580                 }
6581                 return;
6582         }
6583
6584         if (ha->tgt.enable_class_2) {
6585                 if (vha->flags.init_done)
6586                         fc_host_supported_classes(vha->host) =
6587                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6588
6589                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6590         } else {
6591                 if (vha->flags.init_done)
6592                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6593
6594                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6595         }
6596 }
6597
6598 void
6599 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6600         struct init_cb_24xx *icb)
6601 {
6602         struct qla_hw_data *ha = vha->hw;
6603
6604         if (!QLA_TGT_MODE_ENABLED())
6605                 return;
6606
6607         if (ha->tgt.node_name_set) {
6608                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6609                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6610         }
6611
6612         /* disable ZIO at start time. */
6613         if (!vha->flags.init_done) {
6614                 uint32_t tmp;
6615                 tmp = le32_to_cpu(icb->firmware_options_2);
6616                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6617                 icb->firmware_options_2 = cpu_to_le32(tmp);
6618         }
6619 }
6620
6621 void
6622 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6623 {
6624         struct qla_hw_data *ha = vha->hw;
6625
6626         if (!QLA_TGT_MODE_ENABLED())
6627                 return;
6628
6629         if (qla_tgt_mode_enabled(vha)) {
6630                 if (!ha->tgt.saved_set) {
6631                         /* We save only once */
6632                         ha->tgt.saved_exchange_count = nv->exchange_count;
6633                         ha->tgt.saved_firmware_options_1 =
6634                             nv->firmware_options_1;
6635                         ha->tgt.saved_firmware_options_2 =
6636                             nv->firmware_options_2;
6637                         ha->tgt.saved_firmware_options_3 =
6638                             nv->firmware_options_3;
6639                         ha->tgt.saved_set = 1;
6640                 }
6641
6642                 nv->exchange_count = cpu_to_le16(0xFFFF);
6643
6644                 /* Enable target mode */
6645                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6646
6647                 /* Disable ini mode, if requested */
6648                 if (!qla_ini_mode_enabled(vha))
6649                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6650                 /* Disable Full Login after LIP */
6651                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6652                 /* Enable initial LIP */
6653                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6654                 /*
6655                  * clear BIT 15 explicitly as we have seen at
6656                  * least a couple of instances where this was set
6657                  * and this was causing the firmware to not be
6658                  * initialized.
6659                  */
6660                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6661                 if (ql2xtgt_tape_enable)
6662                         /* Enable FC tape support */
6663                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6664                 else
6665                         /* Disable FC tape support */
6666                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6667
6668                 /* Disable Full Login after LIP */
6669                 nv->host_p &= cpu_to_le32(~BIT_10);
6670                 /* Enable target PRLI control */
6671                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6672         } else {
6673                 if (ha->tgt.saved_set) {
6674                         nv->exchange_count = ha->tgt.saved_exchange_count;
6675                         nv->firmware_options_1 =
6676                             ha->tgt.saved_firmware_options_1;
6677                         nv->firmware_options_2 =
6678                             ha->tgt.saved_firmware_options_2;
6679                         nv->firmware_options_3 =
6680                             ha->tgt.saved_firmware_options_3;
6681                 }
6682                 return;
6683         }
6684
6685         if (ha->tgt.enable_class_2) {
6686                 if (vha->flags.init_done)
6687                         fc_host_supported_classes(vha->host) =
6688                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6689
6690                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6691         } else {
6692                 if (vha->flags.init_done)
6693                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6694
6695                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6696         }
6697 }
6698
6699 void
6700 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6701         struct init_cb_81xx *icb)
6702 {
6703         struct qla_hw_data *ha = vha->hw;
6704
6705         if (!QLA_TGT_MODE_ENABLED())
6706                 return;
6707
6708         if (ha->tgt.node_name_set) {
6709                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6710                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6711         }
6712
6713         /* disable ZIO at start time. */
6714         if (!vha->flags.init_done) {
6715                 uint32_t tmp;
6716                 tmp = le32_to_cpu(icb->firmware_options_2);
6717                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6718                 icb->firmware_options_2 = cpu_to_le32(tmp);
6719         }
6720
6721 }
6722
6723 void
6724 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6725 {
6726         if (!QLA_TGT_MODE_ENABLED())
6727                 return;
6728
6729         ha->msix_count += 1; /* For ATIO Q */
6730 }
6731
6732 int
6733 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6734         struct sts_entry_24xx *pkt)
6735 {
6736         switch (pkt->entry_type) {
6737         case ABTS_RECV_24XX:
6738         case ABTS_RESP_24XX:
6739         case CTIO_TYPE7:
6740         case NOTIFY_ACK_TYPE:
6741         case CTIO_CRC2:
6742                 return 1;
6743         default:
6744                 return 0;
6745         }
6746 }
6747
6748 void
6749 qlt_modify_vp_config(struct scsi_qla_host *vha,
6750         struct vp_config_entry_24xx *vpmod)
6751 {
6752         if (qla_tgt_mode_enabled(vha))
6753                 vpmod->options_idx1 &= ~BIT_5;
6754         /* Disable ini mode, if requested */
6755         if (!qla_ini_mode_enabled(vha))
6756                 vpmod->options_idx1 &= ~BIT_4;
6757 }
6758
6759 void
6760 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6761 {
6762         if (!QLA_TGT_MODE_ENABLED())
6763                 return;
6764
6765         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6766                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6767                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6768         } else {
6769                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6770                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6771         }
6772
6773         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6774         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6775         qlt_clear_mode(base_vha);
6776 }
6777
6778 irqreturn_t
6779 qla83xx_msix_atio_q(int irq, void *dev_id)
6780 {
6781         struct rsp_que *rsp;
6782         scsi_qla_host_t *vha;
6783         struct qla_hw_data *ha;
6784         unsigned long flags;
6785
6786         rsp = (struct rsp_que *) dev_id;
6787         ha = rsp->hw;
6788         vha = pci_get_drvdata(ha->pdev);
6789
6790         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6791
6792         qlt_24xx_process_atio_queue(vha, 0);
6793
6794         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6795
6796         return IRQ_HANDLED;
6797 }
6798
6799 static void
6800 qlt_handle_abts_recv_work(struct work_struct *work)
6801 {
6802         struct qla_tgt_sess_op *op = container_of(work,
6803                 struct qla_tgt_sess_op, work);
6804         scsi_qla_host_t *vha = op->vha;
6805         struct qla_hw_data *ha = vha->hw;
6806         unsigned long flags;
6807
6808         if (qla2x00_reset_active(vha) || (op->chip_reset != ha->chip_reset))
6809                 return;
6810
6811         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
6812         qlt_24xx_process_atio_queue(vha, 0);
6813         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
6814
6815         spin_lock_irqsave(&ha->hardware_lock, flags);
6816         qlt_response_pkt_all_vps(vha, (response_t *)&op->atio);
6817         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6818 }
6819
6820 void
6821 qlt_handle_abts_recv(struct scsi_qla_host *vha, response_t *pkt)
6822 {
6823         struct qla_tgt_sess_op *op;
6824
6825         op = kzalloc(sizeof(*op), GFP_ATOMIC);
6826
6827         if (!op) {
6828                 /* do not reach for ATIO queue here.  This is best effort err
6829                  * recovery at this point.
6830                  */
6831                 qlt_response_pkt_all_vps(vha, pkt);
6832                 return;
6833         }
6834
6835         memcpy(&op->atio, pkt, sizeof(*pkt));
6836         op->vha = vha;
6837         op->chip_reset = vha->hw->chip_reset;
6838         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
6839         queue_work(qla_tgt_wq, &op->work);
6840         return;
6841 }
6842
6843 int
6844 qlt_mem_alloc(struct qla_hw_data *ha)
6845 {
6846         if (!QLA_TGT_MODE_ENABLED())
6847                 return 0;
6848
6849         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6850             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6851         if (!ha->tgt.tgt_vp_map)
6852                 return -ENOMEM;
6853
6854         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6855             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6856             &ha->tgt.atio_dma, GFP_KERNEL);
6857         if (!ha->tgt.atio_ring) {
6858                 kfree(ha->tgt.tgt_vp_map);
6859                 return -ENOMEM;
6860         }
6861         return 0;
6862 }
6863
6864 void
6865 qlt_mem_free(struct qla_hw_data *ha)
6866 {
6867         if (!QLA_TGT_MODE_ENABLED())
6868                 return;
6869
6870         if (ha->tgt.atio_ring) {
6871                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6872                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6873                     ha->tgt.atio_dma);
6874         }
6875         kfree(ha->tgt.tgt_vp_map);
6876 }
6877
6878 /* vport_slock to be held by the caller */
6879 void
6880 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6881 {
6882         if (!QLA_TGT_MODE_ENABLED())
6883                 return;
6884
6885         switch (cmd) {
6886         case SET_VP_IDX:
6887                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6888                 break;
6889         case SET_AL_PA:
6890                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6891                 break;
6892         case RESET_VP_IDX:
6893                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6894                 break;
6895         case RESET_AL_PA:
6896                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6897                 break;
6898         }
6899 }
6900
6901 static int __init qlt_parse_ini_mode(void)
6902 {
6903         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6904                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6905         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6906                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6907         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6908                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6909         else
6910                 return false;
6911
6912         return true;
6913 }
6914
6915 int __init qlt_init(void)
6916 {
6917         int ret;
6918
6919         if (!qlt_parse_ini_mode()) {
6920                 ql_log(ql_log_fatal, NULL, 0xe06b,
6921                     "qlt_parse_ini_mode() failed\n");
6922                 return -EINVAL;
6923         }
6924
6925         if (!QLA_TGT_MODE_ENABLED())
6926                 return 0;
6927
6928         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6929             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6930             qla_tgt_mgmt_cmd), 0, NULL);
6931         if (!qla_tgt_mgmt_cmd_cachep) {
6932                 ql_log(ql_log_fatal, NULL, 0xe06d,
6933                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6934                 return -ENOMEM;
6935         }
6936
6937         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
6938                                                  sizeof(qlt_plogi_ack_t),
6939                                                  __alignof__(qlt_plogi_ack_t),
6940                                                  0, NULL);
6941
6942         if (!qla_tgt_plogi_cachep) {
6943                 ql_log(ql_log_fatal, NULL, 0xe06d,
6944                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
6945                 ret = -ENOMEM;
6946                 goto out_mgmt_cmd_cachep;
6947         }
6948
6949         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6950             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6951         if (!qla_tgt_mgmt_cmd_mempool) {
6952                 ql_log(ql_log_fatal, NULL, 0xe06e,
6953                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6954                 ret = -ENOMEM;
6955                 goto out_plogi_cachep;
6956         }
6957
6958         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6959         if (!qla_tgt_wq) {
6960                 ql_log(ql_log_fatal, NULL, 0xe06f,
6961                     "alloc_workqueue for qla_tgt_wq failed\n");
6962                 ret = -ENOMEM;
6963                 goto out_cmd_mempool;
6964         }
6965         /*
6966          * Return 1 to signal that initiator-mode is being disabled
6967          */
6968         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6969
6970 out_cmd_mempool:
6971         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6972 out_plogi_cachep:
6973         kmem_cache_destroy(qla_tgt_plogi_cachep);
6974 out_mgmt_cmd_cachep:
6975         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6976         return ret;
6977 }
6978
6979 void qlt_exit(void)
6980 {
6981         if (!QLA_TGT_MODE_ENABLED())
6982                 return;
6983
6984         destroy_workqueue(qla_tgt_wq);
6985         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6986         kmem_cache_destroy(qla_tgt_plogi_cachep);
6987         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6988 }