1 /* 2 * qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx 3 * 4 * based on qla2x00t.c code: 5 * 6 * Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net> 7 * Copyright (C) 2004 - 2005 Leonid Stoljar 8 * Copyright (C) 2006 Nathaniel Clark <nate@misrule.us> 9 * Copyright (C) 2006 - 2010 ID7 Ltd. 10 * 11 * Forward port and refactoring to modern qla2xxx and target/configfs 12 * 13 * Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org> 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * as published by the Free Software Foundation, version 2 18 * of the License. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/init.h> 28 #include <linux/types.h> 29 #include <linux/blkdev.h> 30 #include <linux/interrupt.h> 31 #include <linux/pci.h> 32 #include <linux/delay.h> 33 #include <linux/list.h> 34 #include <linux/workqueue.h> 35 #include <asm/unaligned.h> 36 #include <scsi/scsi.h> 37 #include <scsi/scsi_host.h> 38 #include <scsi/scsi_tcq.h> 39 #include <target/target_core_base.h> 40 #include <target/target_core_fabric.h> 41 42 #include "qla_def.h" 43 #include "qla_target.h" 44 45 static int ql2xtgt_tape_enable; 46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR); 47 MODULE_PARM_DESC(ql2xtgt_tape_enable, 48 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER."); 49 50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED; 51 module_param(qlini_mode, charp, S_IRUGO); 52 MODULE_PARM_DESC(qlini_mode, 53 "Determines when initiator mode will be enabled. Possible values: " 54 "\"exclusive\" - initiator mode will be enabled on load, " 55 "disabled on enabling target mode and then on disabling target mode " 56 "enabled back; " 57 "\"disabled\" - initiator mode will never be enabled; " 58 "\"enabled\" (default) - initiator mode will always stay enabled."); 59 60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 61 62 static int temp_sam_status = SAM_STAT_BUSY; 63 64 /* 65 * From scsi/fc/fc_fcp.h 66 */ 67 enum fcp_resp_rsp_codes { 68 FCP_TMF_CMPL = 0, 69 FCP_DATA_LEN_INVALID = 1, 70 FCP_CMND_FIELDS_INVALID = 2, 71 FCP_DATA_PARAM_MISMATCH = 3, 72 FCP_TMF_REJECTED = 4, 73 FCP_TMF_FAILED = 5, 74 FCP_TMF_INVALID_LUN = 9, 75 }; 76 77 /* 78 * fc_pri_ta from scsi/fc/fc_fcp.h 79 */ 80 #define FCP_PTA_SIMPLE 0 /* simple task attribute */ 81 #define FCP_PTA_HEADQ 1 /* head of queue task attribute */ 82 #define FCP_PTA_ORDERED 2 /* ordered task attribute */ 83 #define FCP_PTA_ACA 4 /* auto. contingent allegiance */ 84 #define FCP_PTA_MASK 7 /* mask for task attribute field */ 85 #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */ 86 #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */ 87 88 /* 89 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which 90 * must be called under HW lock and could unlock/lock it inside. 91 * It isn't an issue, since in the current implementation on the time when 92 * those functions are called: 93 * 94 * - Either context is IRQ and only IRQ handler can modify HW data, 95 * including rings related fields, 96 * 97 * - Or access to target mode variables from struct qla_tgt doesn't 98 * cross those functions boundaries, except tgt_stop, which 99 * additionally protected by irq_cmd_count. 100 */ 101 /* Predefs for callbacks handed to qla2xxx LLD */ 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha, 103 struct atio_from_isp *pkt); 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt); 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 106 int fn, void *iocb, int flags); 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd 108 *cmd, struct atio_from_isp *atio, int ha_locked); 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha, 110 struct qla_tgt_srr_imm *imm, int ha_lock); 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, 112 struct qla_tgt_cmd *cmd); 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 114 struct atio_from_isp *atio, uint16_t status, int qfull); 115 static void qlt_disable_vha(struct scsi_qla_host *vha); 116 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 /* 122 * Global Variables 123 */ 124 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep; 125 static mempool_t *qla_tgt_mgmt_cmd_mempool; 126 static struct workqueue_struct *qla_tgt_wq; 127 static DEFINE_MUTEX(qla_tgt_mutex); 128 static LIST_HEAD(qla_tgt_glist); 129 130 /* This API intentionally takes dest as a parameter, rather than returning 131 * int value to avoid caller forgetting to issue wmb() after the store */ 132 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest) 133 { 134 scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev); 135 *dest = atomic_inc_return(&base_vha->generation_tick); 136 /* memory barrier */ 137 wmb(); 138 } 139 140 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */ 141 static struct qla_tgt_sess *qlt_find_sess_by_port_name( 142 struct qla_tgt *tgt, 143 const uint8_t *port_name) 144 { 145 struct qla_tgt_sess *sess; 146 147 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { 148 if (!memcmp(sess->port_name, port_name, WWN_SIZE)) 149 return sess; 150 } 151 152 return NULL; 153 } 154 155 /* Might release hw lock, then reaquire!! */ 156 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked) 157 { 158 /* Send marker if required */ 159 if (unlikely(vha->marker_needed != 0)) { 160 int rc = qla2x00_issue_marker(vha, vha_locked); 161 if (rc != QLA_SUCCESS) { 162 ql_dbg(ql_dbg_tgt, vha, 0xe03d, 163 "qla_target(%d): issue_marker() failed\n", 164 vha->vp_idx); 165 } 166 return rc; 167 } 168 return QLA_SUCCESS; 169 } 170 171 static inline 172 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha, 173 uint8_t *d_id) 174 { 175 struct qla_hw_data *ha = vha->hw; 176 uint8_t vp_idx; 177 178 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0])) 179 return NULL; 180 181 if (vha->d_id.b.al_pa == d_id[2]) 182 return vha; 183 184 BUG_ON(ha->tgt.tgt_vp_map == NULL); 185 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx; 186 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 187 return ha->tgt.tgt_vp_map[vp_idx].vha; 188 189 return NULL; 190 } 191 192 static inline 193 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha, 194 uint16_t vp_idx) 195 { 196 struct qla_hw_data *ha = vha->hw; 197 198 if (vha->vp_idx == vp_idx) 199 return vha; 200 201 BUG_ON(ha->tgt.tgt_vp_map == NULL); 202 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 203 return ha->tgt.tgt_vp_map[vp_idx].vha; 204 205 return NULL; 206 } 207 208 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha) 209 { 210 unsigned long flags; 211 212 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 213 214 vha->hw->tgt.num_pend_cmds++; 215 if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds) 216 vha->hw->qla_stats.stat_max_pend_cmds = 217 vha->hw->tgt.num_pend_cmds; 218 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 219 } 220 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha) 221 { 222 unsigned long flags; 223 224 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags); 225 vha->hw->tgt.num_pend_cmds--; 226 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags); 227 } 228 229 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, 230 struct atio_from_isp *atio) 231 { 232 ql_dbg(ql_dbg_tgt, vha, 0xe072, 233 "%s: qla_target(%d): type %x ox_id %04x\n", 234 __func__, vha->vp_idx, atio->u.raw.entry_type, 235 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id)); 236 237 switch (atio->u.raw.entry_type) { 238 case ATIO_TYPE7: 239 { 240 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha, 241 atio->u.isp24.fcp_hdr.d_id); 242 if (unlikely(NULL == host)) { 243 ql_dbg(ql_dbg_tgt, vha, 0xe03e, 244 "qla_target(%d): Received ATIO_TYPE7 " 245 "with unknown d_id %x:%x:%x\n", vha->vp_idx, 246 atio->u.isp24.fcp_hdr.d_id[0], 247 atio->u.isp24.fcp_hdr.d_id[1], 248 atio->u.isp24.fcp_hdr.d_id[2]); 249 break; 250 } 251 qlt_24xx_atio_pkt(host, atio); 252 break; 253 } 254 255 case IMMED_NOTIFY_TYPE: 256 { 257 struct scsi_qla_host *host = vha; 258 struct imm_ntfy_from_isp *entry = 259 (struct imm_ntfy_from_isp *)atio; 260 261 if ((entry->u.isp24.vp_index != 0xFF) && 262 (entry->u.isp24.nport_handle != 0xFFFF)) { 263 host = qlt_find_host_by_vp_idx(vha, 264 entry->u.isp24.vp_index); 265 if (unlikely(!host)) { 266 ql_dbg(ql_dbg_tgt, vha, 0xe03f, 267 "qla_target(%d): Received " 268 "ATIO (IMMED_NOTIFY_TYPE) " 269 "with unknown vp_index %d\n", 270 vha->vp_idx, entry->u.isp24.vp_index); 271 break; 272 } 273 } 274 qlt_24xx_atio_pkt(host, atio); 275 break; 276 } 277 278 default: 279 ql_dbg(ql_dbg_tgt, vha, 0xe040, 280 "qla_target(%d): Received unknown ATIO atio " 281 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 282 break; 283 } 284 285 return; 286 } 287 288 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt) 289 { 290 switch (pkt->entry_type) { 291 case CTIO_CRC2: 292 ql_dbg(ql_dbg_tgt, vha, 0xe073, 293 "qla_target(%d):%s: CRC2 Response pkt\n", 294 vha->vp_idx, __func__); 295 case CTIO_TYPE7: 296 { 297 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 298 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 299 entry->vp_index); 300 if (unlikely(!host)) { 301 ql_dbg(ql_dbg_tgt, vha, 0xe041, 302 "qla_target(%d): Response pkt (CTIO_TYPE7) " 303 "received, with unknown vp_index %d\n", 304 vha->vp_idx, entry->vp_index); 305 break; 306 } 307 qlt_response_pkt(host, pkt); 308 break; 309 } 310 311 case IMMED_NOTIFY_TYPE: 312 { 313 struct scsi_qla_host *host = vha; 314 struct imm_ntfy_from_isp *entry = 315 (struct imm_ntfy_from_isp *)pkt; 316 317 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); 318 if (unlikely(!host)) { 319 ql_dbg(ql_dbg_tgt, vha, 0xe042, 320 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) " 321 "received, with unknown vp_index %d\n", 322 vha->vp_idx, entry->u.isp24.vp_index); 323 break; 324 } 325 qlt_response_pkt(host, pkt); 326 break; 327 } 328 329 case NOTIFY_ACK_TYPE: 330 { 331 struct scsi_qla_host *host = vha; 332 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 333 334 if (0xFF != entry->u.isp24.vp_index) { 335 host = qlt_find_host_by_vp_idx(vha, 336 entry->u.isp24.vp_index); 337 if (unlikely(!host)) { 338 ql_dbg(ql_dbg_tgt, vha, 0xe043, 339 "qla_target(%d): Response " 340 "pkt (NOTIFY_ACK_TYPE) " 341 "received, with unknown " 342 "vp_index %d\n", vha->vp_idx, 343 entry->u.isp24.vp_index); 344 break; 345 } 346 } 347 qlt_response_pkt(host, pkt); 348 break; 349 } 350 351 case ABTS_RECV_24XX: 352 { 353 struct abts_recv_from_24xx *entry = 354 (struct abts_recv_from_24xx *)pkt; 355 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 356 entry->vp_index); 357 if (unlikely(!host)) { 358 ql_dbg(ql_dbg_tgt, vha, 0xe044, 359 "qla_target(%d): Response pkt " 360 "(ABTS_RECV_24XX) received, with unknown " 361 "vp_index %d\n", vha->vp_idx, entry->vp_index); 362 break; 363 } 364 qlt_response_pkt(host, pkt); 365 break; 366 } 367 368 case ABTS_RESP_24XX: 369 { 370 struct abts_resp_to_24xx *entry = 371 (struct abts_resp_to_24xx *)pkt; 372 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 373 entry->vp_index); 374 if (unlikely(!host)) { 375 ql_dbg(ql_dbg_tgt, vha, 0xe045, 376 "qla_target(%d): Response pkt " 377 "(ABTS_RECV_24XX) received, with unknown " 378 "vp_index %d\n", vha->vp_idx, entry->vp_index); 379 break; 380 } 381 qlt_response_pkt(host, pkt); 382 break; 383 } 384 385 default: 386 qlt_response_pkt(vha, pkt); 387 break; 388 } 389 390 } 391 392 static void qlt_free_session_done(struct work_struct *work) 393 { 394 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess, 395 free_work); 396 struct qla_tgt *tgt = sess->tgt; 397 struct scsi_qla_host *vha = sess->vha; 398 struct qla_hw_data *ha = vha->hw; 399 unsigned long flags; 400 bool logout_started = false; 401 fc_port_t fcport; 402 403 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084, 404 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x" 405 " s_id %02x:%02x:%02x logout %d keep %d plogi %d\n", 406 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id, 407 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, 408 sess->logout_on_delete, sess->keep_nport_handle, 409 sess->plogi_ack_needed); 410 411 BUG_ON(!tgt); 412 413 if (sess->logout_on_delete) { 414 int rc; 415 416 memset(&fcport, 0, sizeof(fcport)); 417 fcport.loop_id = sess->loop_id; 418 fcport.d_id = sess->s_id; 419 memcpy(fcport.port_name, sess->port_name, WWN_SIZE); 420 fcport.vha = vha; 421 fcport.tgt_session = sess; 422 423 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL); 424 if (rc != QLA_SUCCESS) 425 ql_log(ql_log_warn, vha, 0xf085, 426 "Schedule logo failed sess %p rc %d\n", 427 sess, rc); 428 else 429 logout_started = true; 430 } 431 432 /* 433 * Release the target session for FC Nexus from fabric module code. 434 */ 435 if (sess->se_sess != NULL) 436 ha->tgt.tgt_ops->free_session(sess); 437 438 if (logout_started) { 439 bool traced = false; 440 441 while (!ACCESS_ONCE(sess->logout_completed)) { 442 if (!traced) { 443 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086, 444 "%s: waiting for sess %p logout\n", 445 __func__, sess); 446 traced = true; 447 } 448 msleep(100); 449 } 450 451 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087, 452 "%s: sess %p logout completed\n", 453 __func__, sess); 454 } 455 456 spin_lock_irqsave(&ha->hardware_lock, flags); 457 458 if (sess->plogi_ack_needed) 459 qlt_send_notify_ack(vha, &sess->tm_iocb, 460 0, 0, 0, 0, 0, 0); 461 462 list_del(&sess->sess_list_entry); 463 464 spin_unlock_irqrestore(&ha->hardware_lock, flags); 465 466 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001, 467 "Unregistration of sess %p finished\n", sess); 468 469 kfree(sess); 470 /* 471 * We need to protect against race, when tgt is freed before or 472 * inside wake_up() 473 */ 474 tgt->sess_count--; 475 if (tgt->sess_count == 0) 476 wake_up_all(&tgt->waitQ); 477 } 478 479 /* ha->hardware_lock supposed to be held on entry */ 480 void qlt_unreg_sess(struct qla_tgt_sess *sess) 481 { 482 struct scsi_qla_host *vha = sess->vha; 483 484 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess); 485 486 if (!list_empty(&sess->del_list_entry)) 487 list_del_init(&sess->del_list_entry); 488 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 489 490 INIT_WORK(&sess->free_work, qlt_free_session_done); 491 schedule_work(&sess->free_work); 492 } 493 EXPORT_SYMBOL(qlt_unreg_sess); 494 495 /* ha->hardware_lock supposed to be held on entry */ 496 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) 497 { 498 struct qla_hw_data *ha = vha->hw; 499 struct qla_tgt_sess *sess = NULL; 500 uint32_t unpacked_lun, lun = 0; 501 uint16_t loop_id; 502 int res = 0; 503 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb; 504 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 505 506 loop_id = le16_to_cpu(n->u.isp24.nport_handle); 507 if (loop_id == 0xFFFF) { 508 /* Global event */ 509 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 510 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt); 511 #if 0 /* FIXME: do we need to choose a session here? */ 512 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) { 513 sess = list_entry(ha->tgt.qla_tgt->sess_list.next, 514 typeof(*sess), sess_list_entry); 515 switch (mcmd) { 516 case QLA_TGT_NEXUS_LOSS_SESS: 517 mcmd = QLA_TGT_NEXUS_LOSS; 518 break; 519 case QLA_TGT_ABORT_ALL_SESS: 520 mcmd = QLA_TGT_ABORT_ALL; 521 break; 522 case QLA_TGT_NEXUS_LOSS: 523 case QLA_TGT_ABORT_ALL: 524 break; 525 default: 526 ql_dbg(ql_dbg_tgt, vha, 0xe046, 527 "qla_target(%d): Not allowed " 528 "command %x in %s", vha->vp_idx, 529 mcmd, __func__); 530 sess = NULL; 531 break; 532 } 533 } else 534 sess = NULL; 535 #endif 536 } else { 537 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 538 } 539 540 ql_dbg(ql_dbg_tgt, vha, 0xe000, 541 "Using sess for qla_tgt_reset: %p\n", sess); 542 if (!sess) { 543 res = -ESRCH; 544 return res; 545 } 546 547 ql_dbg(ql_dbg_tgt, vha, 0xe047, 548 "scsi(%ld): resetting (session %p from port %8phC mcmd %x, " 549 "loop_id %d)\n", vha->host_no, sess, sess->port_name, 550 mcmd, loop_id); 551 552 lun = a->u.isp24.fcp_cmnd.lun; 553 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 554 555 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd, 556 iocb, QLA24XX_MGMT_SEND_NACK); 557 } 558 559 /* ha->hardware_lock supposed to be held on entry */ 560 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess, 561 bool immediate) 562 { 563 struct qla_tgt *tgt = sess->tgt; 564 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5; 565 566 if (sess->deleted) { 567 /* Upgrade to unconditional deletion in case it was temporary */ 568 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING) 569 list_del(&sess->del_list_entry); 570 else 571 return; 572 } 573 574 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, 575 "Scheduling sess %p for deletion\n", sess); 576 577 if (immediate) { 578 dev_loss_tmo = 0; 579 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 580 list_add(&sess->del_list_entry, &tgt->del_sess_list); 581 } else { 582 sess->deleted = QLA_SESS_DELETION_PENDING; 583 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list); 584 } 585 586 sess->expires = jiffies + dev_loss_tmo * HZ; 587 588 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048, 589 "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)" 590 " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n", 591 sess->vha->vp_idx, sess->port_name, sess->loop_id, 592 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa, 593 dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete, 594 sess->generation); 595 596 if (immediate) 597 mod_delayed_work(system_wq, &tgt->sess_del_work, 0); 598 else 599 schedule_delayed_work(&tgt->sess_del_work, 600 sess->expires - jiffies); 601 } 602 603 /* ha->hardware_lock supposed to be held on entry */ 604 static void qlt_clear_tgt_db(struct qla_tgt *tgt) 605 { 606 struct qla_tgt_sess *sess; 607 608 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) 609 qlt_schedule_sess_for_deletion(sess, true); 610 611 /* At this point tgt could be already dead */ 612 } 613 614 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id, 615 uint16_t *loop_id) 616 { 617 struct qla_hw_data *ha = vha->hw; 618 dma_addr_t gid_list_dma; 619 struct gid_list_info *gid_list; 620 char *id_iter; 621 int res, rc, i; 622 uint16_t entries; 623 624 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 625 &gid_list_dma, GFP_KERNEL); 626 if (!gid_list) { 627 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044, 628 "qla_target(%d): DMA Alloc failed of %u\n", 629 vha->vp_idx, qla2x00_gid_list_size(ha)); 630 return -ENOMEM; 631 } 632 633 /* Get list of logged in devices */ 634 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries); 635 if (rc != QLA_SUCCESS) { 636 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045, 637 "qla_target(%d): get_id_list() failed: %x\n", 638 vha->vp_idx, rc); 639 res = -1; 640 goto out_free_id_list; 641 } 642 643 id_iter = (char *)gid_list; 644 res = -1; 645 for (i = 0; i < entries; i++) { 646 struct gid_list_info *gid = (struct gid_list_info *)id_iter; 647 if ((gid->al_pa == s_id[2]) && 648 (gid->area == s_id[1]) && 649 (gid->domain == s_id[0])) { 650 *loop_id = le16_to_cpu(gid->loop_id); 651 res = 0; 652 break; 653 } 654 id_iter += ha->gid_list_info_size; 655 } 656 657 out_free_id_list: 658 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 659 gid_list, gid_list_dma); 660 return res; 661 } 662 663 /* ha->hardware_lock supposed to be held on entry */ 664 static void qlt_undelete_sess(struct qla_tgt_sess *sess) 665 { 666 BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING); 667 668 list_del_init(&sess->del_list_entry); 669 sess->deleted = 0; 670 } 671 672 static void qlt_del_sess_work_fn(struct delayed_work *work) 673 { 674 struct qla_tgt *tgt = container_of(work, struct qla_tgt, 675 sess_del_work); 676 struct scsi_qla_host *vha = tgt->vha; 677 struct qla_hw_data *ha = vha->hw; 678 struct qla_tgt_sess *sess; 679 unsigned long flags, elapsed; 680 681 spin_lock_irqsave(&ha->hardware_lock, flags); 682 while (!list_empty(&tgt->del_sess_list)) { 683 sess = list_entry(tgt->del_sess_list.next, typeof(*sess), 684 del_list_entry); 685 elapsed = jiffies; 686 if (time_after_eq(elapsed, sess->expires)) { 687 /* No turning back */ 688 list_del_init(&sess->del_list_entry); 689 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS; 690 691 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004, 692 "Timeout: sess %p about to be deleted\n", 693 sess); 694 ha->tgt.tgt_ops->shutdown_sess(sess); 695 ha->tgt.tgt_ops->put_sess(sess); 696 } else { 697 schedule_delayed_work(&tgt->sess_del_work, 698 sess->expires - elapsed); 699 break; 700 } 701 } 702 spin_unlock_irqrestore(&ha->hardware_lock, flags); 703 } 704 705 /* 706 * Adds an extra ref to allow to drop hw lock after adding sess to the list. 707 * Caller must put it. 708 */ 709 static struct qla_tgt_sess *qlt_create_sess( 710 struct scsi_qla_host *vha, 711 fc_port_t *fcport, 712 bool local) 713 { 714 struct qla_hw_data *ha = vha->hw; 715 struct qla_tgt_sess *sess; 716 unsigned long flags; 717 unsigned char be_sid[3]; 718 719 /* Check to avoid double sessions */ 720 spin_lock_irqsave(&ha->hardware_lock, flags); 721 list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list, 722 sess_list_entry) { 723 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) { 724 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005, 725 "Double sess %p found (s_id %x:%x:%x, " 726 "loop_id %d), updating to d_id %x:%x:%x, " 727 "loop_id %d", sess, sess->s_id.b.domain, 728 sess->s_id.b.al_pa, sess->s_id.b.area, 729 sess->loop_id, fcport->d_id.b.domain, 730 fcport->d_id.b.al_pa, fcport->d_id.b.area, 731 fcport->loop_id); 732 733 /* Cannot undelete at this point */ 734 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 735 spin_unlock_irqrestore(&ha->hardware_lock, 736 flags); 737 return NULL; 738 } 739 740 if (sess->deleted) 741 qlt_undelete_sess(sess); 742 743 kref_get(&sess->se_sess->sess_kref); 744 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 745 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 746 747 if (sess->local && !local) 748 sess->local = 0; 749 750 qlt_do_generation_tick(vha, &sess->generation); 751 752 spin_unlock_irqrestore(&ha->hardware_lock, flags); 753 754 return sess; 755 } 756 } 757 spin_unlock_irqrestore(&ha->hardware_lock, flags); 758 759 sess = kzalloc(sizeof(*sess), GFP_KERNEL); 760 if (!sess) { 761 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a, 762 "qla_target(%u): session allocation failed, all commands " 763 "from port %8phC will be refused", vha->vp_idx, 764 fcport->port_name); 765 766 return NULL; 767 } 768 sess->tgt = vha->vha_tgt.qla_tgt; 769 sess->vha = vha; 770 sess->s_id = fcport->d_id; 771 sess->loop_id = fcport->loop_id; 772 sess->local = local; 773 INIT_LIST_HEAD(&sess->del_list_entry); 774 775 /* Under normal circumstances we want to logout from firmware when 776 * session eventually ends and release corresponding nport handle. 777 * In the exception cases (e.g. when new PLOGI is waiting) corresponding 778 * code will adjust these flags as necessary. */ 779 sess->logout_on_delete = 1; 780 sess->keep_nport_handle = 0; 781 782 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006, 783 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n", 784 sess, vha->vha_tgt.qla_tgt); 785 786 be_sid[0] = sess->s_id.b.domain; 787 be_sid[1] = sess->s_id.b.area; 788 be_sid[2] = sess->s_id.b.al_pa; 789 /* 790 * Determine if this fc_port->port_name is allowed to access 791 * target mode using explict NodeACLs+MappedLUNs, or using 792 * TPG demo mode. If this is successful a target mode FC nexus 793 * is created. 794 */ 795 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, 796 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) { 797 kfree(sess); 798 return NULL; 799 } 800 /* 801 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess 802 * access across ->hardware_lock reaquire. 803 */ 804 kref_get(&sess->se_sess->sess_kref); 805 806 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED); 807 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name)); 808 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name)); 809 810 spin_lock_irqsave(&ha->hardware_lock, flags); 811 list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list); 812 vha->vha_tgt.qla_tgt->sess_count++; 813 qlt_do_generation_tick(vha, &sess->generation); 814 spin_unlock_irqrestore(&ha->hardware_lock, flags); 815 816 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b, 817 "qla_target(%d): %ssession for wwn %8phC (loop_id %d, " 818 "s_id %x:%x:%x, confirmed completion %ssupported) added\n", 819 vha->vp_idx, local ? "local " : "", fcport->port_name, 820 fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area, 821 sess->s_id.b.al_pa, sess->conf_compl_supported ? "" : "not "); 822 823 return sess; 824 } 825 826 /* 827 * Called from qla2x00_reg_remote_port() 828 */ 829 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) 830 { 831 struct qla_hw_data *ha = vha->hw; 832 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 833 struct qla_tgt_sess *sess; 834 unsigned long flags; 835 836 if (!vha->hw->tgt.tgt_ops) 837 return; 838 839 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 840 return; 841 842 if (qla_ini_mode_enabled(vha)) 843 return; 844 845 spin_lock_irqsave(&ha->hardware_lock, flags); 846 if (tgt->tgt_stop) { 847 spin_unlock_irqrestore(&ha->hardware_lock, flags); 848 return; 849 } 850 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 851 if (!sess) { 852 spin_unlock_irqrestore(&ha->hardware_lock, flags); 853 854 mutex_lock(&vha->vha_tgt.tgt_mutex); 855 sess = qlt_create_sess(vha, fcport, false); 856 mutex_unlock(&vha->vha_tgt.tgt_mutex); 857 858 spin_lock_irqsave(&ha->hardware_lock, flags); 859 } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 860 /* Point of no return */ 861 spin_unlock_irqrestore(&ha->hardware_lock, flags); 862 return; 863 } else { 864 kref_get(&sess->se_sess->sess_kref); 865 866 if (sess->deleted) { 867 qlt_undelete_sess(sess); 868 869 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c, 870 "qla_target(%u): %ssession for port %8phC " 871 "(loop ID %d) reappeared\n", vha->vp_idx, 872 sess->local ? "local " : "", sess->port_name, 873 sess->loop_id); 874 875 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007, 876 "Reappeared sess %p\n", sess); 877 } 878 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 879 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 880 } 881 882 if (sess && sess->local) { 883 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d, 884 "qla_target(%u): local session for " 885 "port %8phC (loop ID %d) became global\n", vha->vp_idx, 886 fcport->port_name, sess->loop_id); 887 sess->local = 0; 888 } 889 ha->tgt.tgt_ops->put_sess(sess); 890 spin_unlock_irqrestore(&ha->hardware_lock, flags); 891 } 892 893 /* 894 * max_gen - specifies maximum session generation 895 * at which this deletion requestion is still valid 896 */ 897 void 898 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen) 899 { 900 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 901 struct qla_tgt_sess *sess; 902 903 if (!vha->hw->tgt.tgt_ops) 904 return; 905 906 if (!tgt) 907 return; 908 909 if (tgt->tgt_stop) { 910 return; 911 } 912 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 913 if (!sess) { 914 return; 915 } 916 917 if (max_gen - sess->generation < 0) { 918 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092, 919 "Ignoring stale deletion request for se_sess %p / sess %p" 920 " for port %8phC, req_gen %d, sess_gen %d\n", 921 sess->se_sess, sess, sess->port_name, max_gen, 922 sess->generation); 923 return; 924 } 925 926 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess); 927 928 sess->local = 1; 929 qlt_schedule_sess_for_deletion(sess, false); 930 } 931 932 static inline int test_tgt_sess_count(struct qla_tgt *tgt) 933 { 934 struct qla_hw_data *ha = tgt->ha; 935 unsigned long flags; 936 int res; 937 /* 938 * We need to protect against race, when tgt is freed before or 939 * inside wake_up() 940 */ 941 spin_lock_irqsave(&ha->hardware_lock, flags); 942 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002, 943 "tgt %p, empty(sess_list)=%d sess_count=%d\n", 944 tgt, list_empty(&tgt->sess_list), tgt->sess_count); 945 res = (tgt->sess_count == 0); 946 spin_unlock_irqrestore(&ha->hardware_lock, flags); 947 948 return res; 949 } 950 951 /* Called by tcm_qla2xxx configfs code */ 952 int qlt_stop_phase1(struct qla_tgt *tgt) 953 { 954 struct scsi_qla_host *vha = tgt->vha; 955 struct qla_hw_data *ha = tgt->ha; 956 unsigned long flags; 957 958 mutex_lock(&qla_tgt_mutex); 959 if (!vha->fc_vport) { 960 struct Scsi_Host *sh = vha->host; 961 struct fc_host_attrs *fc_host = shost_to_fc_host(sh); 962 bool npiv_vports; 963 964 spin_lock_irqsave(sh->host_lock, flags); 965 npiv_vports = (fc_host->npiv_vports_inuse); 966 spin_unlock_irqrestore(sh->host_lock, flags); 967 968 if (npiv_vports) { 969 mutex_unlock(&qla_tgt_mutex); 970 return -EPERM; 971 } 972 } 973 if (tgt->tgt_stop || tgt->tgt_stopped) { 974 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e, 975 "Already in tgt->tgt_stop or tgt_stopped state\n"); 976 mutex_unlock(&qla_tgt_mutex); 977 return -EPERM; 978 } 979 980 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n", 981 vha->host_no, vha); 982 /* 983 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted]. 984 * Lock is needed, because we still can get an incoming packet. 985 */ 986 mutex_lock(&vha->vha_tgt.tgt_mutex); 987 spin_lock_irqsave(&ha->hardware_lock, flags); 988 tgt->tgt_stop = 1; 989 qlt_clear_tgt_db(tgt); 990 spin_unlock_irqrestore(&ha->hardware_lock, flags); 991 mutex_unlock(&vha->vha_tgt.tgt_mutex); 992 mutex_unlock(&qla_tgt_mutex); 993 994 flush_delayed_work(&tgt->sess_del_work); 995 996 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009, 997 "Waiting for sess works (tgt %p)", tgt); 998 spin_lock_irqsave(&tgt->sess_work_lock, flags); 999 while (!list_empty(&tgt->sess_works_list)) { 1000 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1001 flush_scheduled_work(); 1002 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1003 } 1004 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1005 1006 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a, 1007 "Waiting for tgt %p: list_empty(sess_list)=%d " 1008 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list), 1009 tgt->sess_count); 1010 1011 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 1012 1013 /* Big hammer */ 1014 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha)) 1015 qlt_disable_vha(vha); 1016 1017 /* Wait for sessions to clear out (just in case) */ 1018 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 1019 return 0; 1020 } 1021 EXPORT_SYMBOL(qlt_stop_phase1); 1022 1023 /* Called by tcm_qla2xxx configfs code */ 1024 void qlt_stop_phase2(struct qla_tgt *tgt) 1025 { 1026 struct qla_hw_data *ha = tgt->ha; 1027 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); 1028 unsigned long flags; 1029 1030 if (tgt->tgt_stopped) { 1031 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f, 1032 "Already in tgt->tgt_stopped state\n"); 1033 dump_stack(); 1034 return; 1035 } 1036 1037 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b, 1038 "Waiting for %d IRQ commands to complete (tgt %p)", 1039 tgt->irq_cmd_count, tgt); 1040 1041 mutex_lock(&vha->vha_tgt.tgt_mutex); 1042 spin_lock_irqsave(&ha->hardware_lock, flags); 1043 while (tgt->irq_cmd_count != 0) { 1044 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1045 udelay(2); 1046 spin_lock_irqsave(&ha->hardware_lock, flags); 1047 } 1048 tgt->tgt_stop = 0; 1049 tgt->tgt_stopped = 1; 1050 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1051 mutex_unlock(&vha->vha_tgt.tgt_mutex); 1052 1053 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished", 1054 tgt); 1055 } 1056 EXPORT_SYMBOL(qlt_stop_phase2); 1057 1058 /* Called from qlt_remove_target() -> qla2x00_remove_one() */ 1059 static void qlt_release(struct qla_tgt *tgt) 1060 { 1061 scsi_qla_host_t *vha = tgt->vha; 1062 1063 if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped) 1064 qlt_stop_phase2(tgt); 1065 1066 vha->vha_tgt.qla_tgt = NULL; 1067 1068 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d, 1069 "Release of tgt %p finished\n", tgt); 1070 1071 kfree(tgt); 1072 } 1073 1074 /* ha->hardware_lock supposed to be held on entry */ 1075 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type, 1076 const void *param, unsigned int param_size) 1077 { 1078 struct qla_tgt_sess_work_param *prm; 1079 unsigned long flags; 1080 1081 prm = kzalloc(sizeof(*prm), GFP_ATOMIC); 1082 if (!prm) { 1083 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050, 1084 "qla_target(%d): Unable to create session " 1085 "work, command will be refused", 0); 1086 return -ENOMEM; 1087 } 1088 1089 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e, 1090 "Scheduling work (type %d, prm %p)" 1091 " to find session for param %p (size %d, tgt %p)\n", 1092 type, prm, param, param_size, tgt); 1093 1094 prm->type = type; 1095 memcpy(&prm->tm_iocb, param, param_size); 1096 1097 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1098 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list); 1099 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1100 1101 schedule_work(&tgt->sess_work); 1102 1103 return 0; 1104 } 1105 1106 /* 1107 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1108 */ 1109 static void qlt_send_notify_ack(struct scsi_qla_host *vha, 1110 struct imm_ntfy_from_isp *ntfy, 1111 uint32_t add_flags, uint16_t resp_code, int resp_code_valid, 1112 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan) 1113 { 1114 struct qla_hw_data *ha = vha->hw; 1115 request_t *pkt; 1116 struct nack_to_isp *nack; 1117 1118 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha); 1119 1120 /* Send marker if required */ 1121 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1122 return; 1123 1124 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 1125 if (!pkt) { 1126 ql_dbg(ql_dbg_tgt, vha, 0xe049, 1127 "qla_target(%d): %s failed: unable to allocate " 1128 "request packet\n", vha->vp_idx, __func__); 1129 return; 1130 } 1131 1132 if (vha->vha_tgt.qla_tgt != NULL) 1133 vha->vha_tgt.qla_tgt->notify_ack_expected++; 1134 1135 pkt->entry_type = NOTIFY_ACK_TYPE; 1136 pkt->entry_count = 1; 1137 1138 nack = (struct nack_to_isp *)pkt; 1139 nack->ox_id = ntfy->ox_id; 1140 1141 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 1142 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 1143 nack->u.isp24.flags = ntfy->u.isp24.flags & 1144 cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 1145 } 1146 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 1147 nack->u.isp24.status = ntfy->u.isp24.status; 1148 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 1149 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 1150 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 1151 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 1152 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 1153 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags); 1154 nack->u.isp24.srr_reject_code = srr_reject_code; 1155 nack->u.isp24.srr_reject_code_expl = srr_explan; 1156 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 1157 1158 ql_dbg(ql_dbg_tgt, vha, 0xe005, 1159 "qla_target(%d): Sending 24xx Notify Ack %d\n", 1160 vha->vp_idx, nack->u.isp24.status); 1161 1162 /* Memory Barrier */ 1163 wmb(); 1164 qla2x00_start_iocbs(vha, vha->req); 1165 } 1166 1167 /* 1168 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1169 */ 1170 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha, 1171 struct abts_recv_from_24xx *abts, uint32_t status, 1172 bool ids_reversed) 1173 { 1174 struct qla_hw_data *ha = vha->hw; 1175 struct abts_resp_to_24xx *resp; 1176 uint32_t f_ctl; 1177 uint8_t *p; 1178 1179 ql_dbg(ql_dbg_tgt, vha, 0xe006, 1180 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n", 1181 ha, abts, status); 1182 1183 /* Send marker if required */ 1184 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1185 return; 1186 1187 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1188 if (!resp) { 1189 ql_dbg(ql_dbg_tgt, vha, 0xe04a, 1190 "qla_target(%d): %s failed: unable to allocate " 1191 "request packet", vha->vp_idx, __func__); 1192 return; 1193 } 1194 1195 resp->entry_type = ABTS_RESP_24XX; 1196 resp->entry_count = 1; 1197 resp->nport_handle = abts->nport_handle; 1198 resp->vp_index = vha->vp_idx; 1199 resp->sof_type = abts->sof_type; 1200 resp->exchange_address = abts->exchange_address; 1201 resp->fcp_hdr_le = abts->fcp_hdr_le; 1202 f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP | 1203 F_CTL_LAST_SEQ | F_CTL_END_SEQ | 1204 F_CTL_SEQ_INITIATIVE); 1205 p = (uint8_t *)&f_ctl; 1206 resp->fcp_hdr_le.f_ctl[0] = *p++; 1207 resp->fcp_hdr_le.f_ctl[1] = *p++; 1208 resp->fcp_hdr_le.f_ctl[2] = *p; 1209 if (ids_reversed) { 1210 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0]; 1211 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1]; 1212 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2]; 1213 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0]; 1214 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1]; 1215 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2]; 1216 } else { 1217 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0]; 1218 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1]; 1219 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2]; 1220 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0]; 1221 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1]; 1222 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2]; 1223 } 1224 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort; 1225 if (status == FCP_TMF_CMPL) { 1226 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC; 1227 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID; 1228 resp->payload.ba_acct.low_seq_cnt = 0x0000; 1229 resp->payload.ba_acct.high_seq_cnt = 0xFFFF; 1230 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id; 1231 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id; 1232 } else { 1233 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT; 1234 resp->payload.ba_rjt.reason_code = 1235 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM; 1236 /* Other bytes are zero */ 1237 } 1238 1239 vha->vha_tgt.qla_tgt->abts_resp_expected++; 1240 1241 /* Memory Barrier */ 1242 wmb(); 1243 qla2x00_start_iocbs(vha, vha->req); 1244 } 1245 1246 /* 1247 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1248 */ 1249 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha, 1250 struct abts_resp_from_24xx_fw *entry) 1251 { 1252 struct ctio7_to_24xx *ctio; 1253 1254 ql_dbg(ql_dbg_tgt, vha, 0xe007, 1255 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw); 1256 /* Send marker if required */ 1257 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1258 return; 1259 1260 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL); 1261 if (ctio == NULL) { 1262 ql_dbg(ql_dbg_tgt, vha, 0xe04b, 1263 "qla_target(%d): %s failed: unable to allocate " 1264 "request packet\n", vha->vp_idx, __func__); 1265 return; 1266 } 1267 1268 /* 1269 * We've got on entrance firmware's response on by us generated 1270 * ABTS response. So, in it ID fields are reversed. 1271 */ 1272 1273 ctio->entry_type = CTIO_TYPE7; 1274 ctio->entry_count = 1; 1275 ctio->nport_handle = entry->nport_handle; 1276 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1277 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 1278 ctio->vp_index = vha->vp_idx; 1279 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0]; 1280 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1]; 1281 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2]; 1282 ctio->exchange_addr = entry->exchange_addr_to_abort; 1283 ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1284 CTIO7_FLAGS_TERMINATE); 1285 ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id); 1286 1287 /* Memory Barrier */ 1288 wmb(); 1289 qla2x00_start_iocbs(vha, vha->req); 1290 1291 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry, 1292 FCP_TMF_CMPL, true); 1293 } 1294 1295 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag) 1296 { 1297 struct qla_tgt_sess_op *op; 1298 struct qla_tgt_cmd *cmd; 1299 1300 spin_lock(&vha->cmd_list_lock); 1301 1302 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 1303 if (tag == op->atio.u.isp24.exchange_addr) { 1304 op->aborted = true; 1305 spin_unlock(&vha->cmd_list_lock); 1306 return 1; 1307 } 1308 } 1309 1310 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 1311 if (tag == cmd->atio.u.isp24.exchange_addr) { 1312 cmd->state = QLA_TGT_STATE_ABORTED; 1313 spin_unlock(&vha->cmd_list_lock); 1314 return 1; 1315 } 1316 } 1317 1318 spin_unlock(&vha->cmd_list_lock); 1319 return 0; 1320 } 1321 1322 /* drop cmds for the given lun 1323 * XXX only looks for cmds on the port through which lun reset was recieved 1324 * XXX does not go through the list of other port (which may have cmds 1325 * for the same lun) 1326 */ 1327 static void abort_cmds_for_lun(struct scsi_qla_host *vha, 1328 uint32_t lun, uint8_t *s_id) 1329 { 1330 struct qla_tgt_sess_op *op; 1331 struct qla_tgt_cmd *cmd; 1332 uint32_t key; 1333 1334 key = sid_to_key(s_id); 1335 spin_lock(&vha->cmd_list_lock); 1336 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 1337 uint32_t op_key; 1338 uint32_t op_lun; 1339 1340 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id); 1341 op_lun = scsilun_to_int( 1342 (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun); 1343 if (op_key == key && op_lun == lun) 1344 op->aborted = true; 1345 } 1346 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 1347 uint32_t cmd_key; 1348 uint32_t cmd_lun; 1349 1350 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id); 1351 cmd_lun = scsilun_to_int( 1352 (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun); 1353 if (cmd_key == key && cmd_lun == lun) 1354 cmd->state = QLA_TGT_STATE_ABORTED; 1355 } 1356 spin_unlock(&vha->cmd_list_lock); 1357 } 1358 1359 /* ha->hardware_lock supposed to be held on entry */ 1360 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1361 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess) 1362 { 1363 struct qla_hw_data *ha = vha->hw; 1364 struct se_session *se_sess = sess->se_sess; 1365 struct qla_tgt_mgmt_cmd *mcmd; 1366 struct se_cmd *se_cmd; 1367 u32 lun = 0; 1368 int rc; 1369 bool found_lun = false; 1370 1371 spin_lock(&se_sess->sess_cmd_lock); 1372 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { 1373 struct qla_tgt_cmd *cmd = 1374 container_of(se_cmd, struct qla_tgt_cmd, se_cmd); 1375 if (se_cmd->tag == abts->exchange_addr_to_abort) { 1376 lun = cmd->unpacked_lun; 1377 found_lun = true; 1378 break; 1379 } 1380 } 1381 spin_unlock(&se_sess->sess_cmd_lock); 1382 1383 /* cmd not in LIO lists, look in qla list */ 1384 if (!found_lun) { 1385 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) { 1386 /* send TASK_ABORT response immediately */ 1387 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false); 1388 return 0; 1389 } else { 1390 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081, 1391 "unable to find cmd in driver or LIO for tag 0x%x\n", 1392 abts->exchange_addr_to_abort); 1393 return -ENOENT; 1394 } 1395 } 1396 1397 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f, 1398 "qla_target(%d): task abort (tag=%d)\n", 1399 vha->vp_idx, abts->exchange_addr_to_abort); 1400 1401 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 1402 if (mcmd == NULL) { 1403 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051, 1404 "qla_target(%d): %s: Allocation of ABORT cmd failed", 1405 vha->vp_idx, __func__); 1406 return -ENOMEM; 1407 } 1408 memset(mcmd, 0, sizeof(*mcmd)); 1409 1410 mcmd->sess = sess; 1411 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts)); 1412 mcmd->reset_count = vha->hw->chip_reset; 1413 1414 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK, 1415 abts->exchange_addr_to_abort); 1416 if (rc != 0) { 1417 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052, 1418 "qla_target(%d): tgt_ops->handle_tmr()" 1419 " failed: %d", vha->vp_idx, rc); 1420 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1421 return -EFAULT; 1422 } 1423 1424 return 0; 1425 } 1426 1427 /* 1428 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1429 */ 1430 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1431 struct abts_recv_from_24xx *abts) 1432 { 1433 struct qla_hw_data *ha = vha->hw; 1434 struct qla_tgt_sess *sess; 1435 uint32_t tag = abts->exchange_addr_to_abort; 1436 uint8_t s_id[3]; 1437 int rc; 1438 1439 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { 1440 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053, 1441 "qla_target(%d): ABTS: Abort Sequence not " 1442 "supported\n", vha->vp_idx); 1443 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1444 return; 1445 } 1446 1447 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { 1448 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010, 1449 "qla_target(%d): ABTS: Unknown Exchange " 1450 "Address received\n", vha->vp_idx); 1451 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1452 return; 1453 } 1454 1455 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011, 1456 "qla_target(%d): task abort (s_id=%x:%x:%x, " 1457 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2], 1458 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag, 1459 le32_to_cpu(abts->fcp_hdr_le.parameter)); 1460 1461 s_id[0] = abts->fcp_hdr_le.s_id[2]; 1462 s_id[1] = abts->fcp_hdr_le.s_id[1]; 1463 s_id[2] = abts->fcp_hdr_le.s_id[0]; 1464 1465 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 1466 if (!sess) { 1467 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012, 1468 "qla_target(%d): task abort for non-existant session\n", 1469 vha->vp_idx); 1470 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 1471 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts)); 1472 if (rc != 0) { 1473 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, 1474 false); 1475 } 1476 return; 1477 } 1478 1479 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 1480 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1481 return; 1482 } 1483 1484 rc = __qlt_24xx_handle_abts(vha, abts, sess); 1485 if (rc != 0) { 1486 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, 1487 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n", 1488 vha->vp_idx, rc); 1489 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1490 return; 1491 } 1492 } 1493 1494 /* 1495 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1496 */ 1497 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, 1498 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) 1499 { 1500 struct atio_from_isp *atio = &mcmd->orig_iocb.atio; 1501 struct ctio7_to_24xx *ctio; 1502 uint16_t temp; 1503 1504 ql_dbg(ql_dbg_tgt, ha, 0xe008, 1505 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n", 1506 ha, atio, resp_code); 1507 1508 /* Send marker if required */ 1509 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS) 1510 return; 1511 1512 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL); 1513 if (ctio == NULL) { 1514 ql_dbg(ql_dbg_tgt, ha, 0xe04c, 1515 "qla_target(%d): %s failed: unable to allocate " 1516 "request packet\n", ha->vp_idx, __func__); 1517 return; 1518 } 1519 1520 ctio->entry_type = CTIO_TYPE7; 1521 ctio->entry_count = 1; 1522 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1523 ctio->nport_handle = mcmd->sess->loop_id; 1524 ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 1525 ctio->vp_index = ha->vp_idx; 1526 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1527 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1528 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1529 ctio->exchange_addr = atio->u.isp24.exchange_addr; 1530 ctio->u.status1.flags = (atio->u.isp24.attr << 9) | 1531 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS); 1532 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1533 ctio->u.status1.ox_id = cpu_to_le16(temp); 1534 ctio->u.status1.scsi_status = 1535 cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); 1536 ctio->u.status1.response_len = cpu_to_le16(8); 1537 ctio->u.status1.sense_data[0] = resp_code; 1538 1539 /* Memory Barrier */ 1540 wmb(); 1541 qla2x00_start_iocbs(ha, ha->req); 1542 } 1543 1544 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) 1545 { 1546 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1547 } 1548 EXPORT_SYMBOL(qlt_free_mcmd); 1549 1550 /* callback from target fabric module code */ 1551 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) 1552 { 1553 struct scsi_qla_host *vha = mcmd->sess->vha; 1554 struct qla_hw_data *ha = vha->hw; 1555 unsigned long flags; 1556 1557 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013, 1558 "TM response mcmd (%p) status %#x state %#x", 1559 mcmd, mcmd->fc_tm_rsp, mcmd->flags); 1560 1561 spin_lock_irqsave(&ha->hardware_lock, flags); 1562 1563 if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) { 1564 /* 1565 * Either a chip reset is active or this request was from 1566 * previous life, just abort the processing. 1567 */ 1568 ql_dbg(ql_dbg_async, vha, 0xe100, 1569 "RESET-TMR active/old-count/new-count = %d/%d/%d.\n", 1570 qla2x00_reset_active(vha), mcmd->reset_count, 1571 ha->chip_reset); 1572 ha->tgt.tgt_ops->free_mcmd(mcmd); 1573 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1574 return; 1575 } 1576 1577 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) 1578 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, 1579 0, 0, 0, 0, 0, 0); 1580 else { 1581 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK) 1582 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, 1583 mcmd->fc_tm_rsp, false); 1584 else 1585 qlt_24xx_send_task_mgmt_ctio(vha, mcmd, 1586 mcmd->fc_tm_rsp); 1587 } 1588 /* 1589 * Make the callback for ->free_mcmd() to queue_work() and invoke 1590 * target_put_sess_cmd() to drop cmd_kref to 1. The final 1591 * target_put_sess_cmd() call will be made from TFO->check_stop_free() 1592 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd 1593 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> 1594 * qlt_xmit_tm_rsp() returns here.. 1595 */ 1596 ha->tgt.tgt_ops->free_mcmd(mcmd); 1597 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1598 } 1599 EXPORT_SYMBOL(qlt_xmit_tm_rsp); 1600 1601 /* No locks */ 1602 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm) 1603 { 1604 struct qla_tgt_cmd *cmd = prm->cmd; 1605 1606 BUG_ON(cmd->sg_cnt == 0); 1607 1608 prm->sg = (struct scatterlist *)cmd->sg; 1609 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, 1610 cmd->sg_cnt, cmd->dma_data_direction); 1611 if (unlikely(prm->seg_cnt == 0)) 1612 goto out_err; 1613 1614 prm->cmd->sg_mapped = 1; 1615 1616 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) { 1617 /* 1618 * If greater than four sg entries then we need to allocate 1619 * the continuation entries 1620 */ 1621 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) 1622 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - 1623 prm->tgt->datasegs_per_cmd, 1624 prm->tgt->datasegs_per_cont); 1625 } else { 1626 /* DIF */ 1627 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1628 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1629 prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz); 1630 prm->tot_dsds = prm->seg_cnt; 1631 } else 1632 prm->tot_dsds = prm->seg_cnt; 1633 1634 if (cmd->prot_sg_cnt) { 1635 prm->prot_sg = cmd->prot_sg; 1636 prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev, 1637 cmd->prot_sg, cmd->prot_sg_cnt, 1638 cmd->dma_data_direction); 1639 if (unlikely(prm->prot_seg_cnt == 0)) 1640 goto out_err; 1641 1642 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) || 1643 (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) { 1644 /* Dif Bundling not support here */ 1645 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen, 1646 cmd->blk_sz); 1647 prm->tot_dsds += prm->prot_seg_cnt; 1648 } else 1649 prm->tot_dsds += prm->prot_seg_cnt; 1650 } 1651 } 1652 1653 return 0; 1654 1655 out_err: 1656 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d, 1657 "qla_target(%d): PCI mapping failed: sg_cnt=%d", 1658 0, prm->cmd->sg_cnt); 1659 return -1; 1660 } 1661 1662 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 1663 { 1664 struct qla_hw_data *ha = vha->hw; 1665 1666 if (!cmd->sg_mapped) 1667 return; 1668 1669 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 1670 cmd->sg_mapped = 0; 1671 1672 if (cmd->prot_sg_cnt) 1673 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt, 1674 cmd->dma_data_direction); 1675 1676 if (cmd->ctx_dsd_alloced) 1677 qla2x00_clean_dsd_pool(ha, NULL, cmd); 1678 1679 if (cmd->ctx) 1680 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma); 1681 } 1682 1683 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, 1684 uint32_t req_cnt) 1685 { 1686 uint32_t cnt, cnt_in; 1687 1688 if (vha->req->cnt < (req_cnt + 2)) { 1689 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out); 1690 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in); 1691 1692 if (vha->req->ring_index < cnt) 1693 vha->req->cnt = cnt - vha->req->ring_index; 1694 else 1695 vha->req->cnt = vha->req->length - 1696 (vha->req->ring_index - cnt); 1697 } 1698 1699 if (unlikely(vha->req->cnt < (req_cnt + 2))) { 1700 ql_dbg(ql_dbg_io, vha, 0x305a, 1701 "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", 1702 vha->vp_idx, vha->req->ring_index, 1703 vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length); 1704 return -EAGAIN; 1705 } 1706 vha->req->cnt -= req_cnt; 1707 1708 return 0; 1709 } 1710 1711 /* 1712 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1713 */ 1714 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha) 1715 { 1716 /* Adjust ring index. */ 1717 vha->req->ring_index++; 1718 if (vha->req->ring_index == vha->req->length) { 1719 vha->req->ring_index = 0; 1720 vha->req->ring_ptr = vha->req->ring; 1721 } else { 1722 vha->req->ring_ptr++; 1723 } 1724 return (cont_entry_t *)vha->req->ring_ptr; 1725 } 1726 1727 /* ha->hardware_lock supposed to be held on entry */ 1728 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha) 1729 { 1730 struct qla_hw_data *ha = vha->hw; 1731 uint32_t h; 1732 1733 h = ha->tgt.current_handle; 1734 /* always increment cmd handle */ 1735 do { 1736 ++h; 1737 if (h > DEFAULT_OUTSTANDING_COMMANDS) 1738 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ 1739 if (h == ha->tgt.current_handle) { 1740 ql_dbg(ql_dbg_io, vha, 0x305b, 1741 "qla_target(%d): Ran out of " 1742 "empty cmd slots in ha %p\n", vha->vp_idx, ha); 1743 h = QLA_TGT_NULL_HANDLE; 1744 break; 1745 } 1746 } while ((h == QLA_TGT_NULL_HANDLE) || 1747 (h == QLA_TGT_SKIP_HANDLE) || 1748 (ha->tgt.cmds[h-1] != NULL)); 1749 1750 if (h != QLA_TGT_NULL_HANDLE) 1751 ha->tgt.current_handle = h; 1752 1753 return h; 1754 } 1755 1756 /* ha->hardware_lock supposed to be held on entry */ 1757 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, 1758 struct scsi_qla_host *vha) 1759 { 1760 uint32_t h; 1761 struct ctio7_to_24xx *pkt; 1762 struct qla_hw_data *ha = vha->hw; 1763 struct atio_from_isp *atio = &prm->cmd->atio; 1764 uint16_t temp; 1765 1766 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr; 1767 prm->pkt = pkt; 1768 memset(pkt, 0, sizeof(*pkt)); 1769 1770 pkt->entry_type = CTIO_TYPE7; 1771 pkt->entry_count = (uint8_t)prm->req_cnt; 1772 pkt->vp_index = vha->vp_idx; 1773 1774 h = qlt_make_handle(vha); 1775 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 1776 /* 1777 * CTIO type 7 from the firmware doesn't provide a way to 1778 * know the initiator's LOOP ID, hence we can't find 1779 * the session and, so, the command. 1780 */ 1781 return -EAGAIN; 1782 } else 1783 ha->tgt.cmds[h-1] = prm->cmd; 1784 1785 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 1786 pkt->nport_handle = prm->cmd->loop_id; 1787 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 1788 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1789 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1790 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1791 pkt->exchange_addr = atio->u.isp24.exchange_addr; 1792 pkt->u.status0.flags |= (atio->u.isp24.attr << 9); 1793 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 1794 pkt->u.status0.ox_id = cpu_to_le16(temp); 1795 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); 1796 1797 return 0; 1798 } 1799 1800 /* 1801 * ha->hardware_lock supposed to be held on entry. We have already made sure 1802 * that there is sufficient amount of request entries to not drop it. 1803 */ 1804 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm, 1805 struct scsi_qla_host *vha) 1806 { 1807 int cnt; 1808 uint32_t *dword_ptr; 1809 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1810 1811 /* Build continuation packets */ 1812 while (prm->seg_cnt > 0) { 1813 cont_a64_entry_t *cont_pkt64 = 1814 (cont_a64_entry_t *)qlt_get_req_pkt(vha); 1815 1816 /* 1817 * Make sure that from cont_pkt64 none of 1818 * 64-bit specific fields used for 32-bit 1819 * addressing. Cast to (cont_entry_t *) for 1820 * that. 1821 */ 1822 1823 memset(cont_pkt64, 0, sizeof(*cont_pkt64)); 1824 1825 cont_pkt64->entry_count = 1; 1826 cont_pkt64->sys_define = 0; 1827 1828 if (enable_64bit_addressing) { 1829 cont_pkt64->entry_type = CONTINUE_A64_TYPE; 1830 dword_ptr = 1831 (uint32_t *)&cont_pkt64->dseg_0_address; 1832 } else { 1833 cont_pkt64->entry_type = CONTINUE_TYPE; 1834 dword_ptr = 1835 (uint32_t *)&((cont_entry_t *) 1836 cont_pkt64)->dseg_0_address; 1837 } 1838 1839 /* Load continuation entry data segments */ 1840 for (cnt = 0; 1841 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; 1842 cnt++, prm->seg_cnt--) { 1843 *dword_ptr++ = 1844 cpu_to_le32(pci_dma_lo32 1845 (sg_dma_address(prm->sg))); 1846 if (enable_64bit_addressing) { 1847 *dword_ptr++ = 1848 cpu_to_le32(pci_dma_hi32 1849 (sg_dma_address 1850 (prm->sg))); 1851 } 1852 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1853 1854 prm->sg = sg_next(prm->sg); 1855 } 1856 } 1857 } 1858 1859 /* 1860 * ha->hardware_lock supposed to be held on entry. We have already made sure 1861 * that there is sufficient amount of request entries to not drop it. 1862 */ 1863 static void qlt_load_data_segments(struct qla_tgt_prm *prm, 1864 struct scsi_qla_host *vha) 1865 { 1866 int cnt; 1867 uint32_t *dword_ptr; 1868 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1869 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt; 1870 1871 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen); 1872 1873 /* Setup packet address segment pointer */ 1874 dword_ptr = pkt24->u.status0.dseg_0_address; 1875 1876 /* Set total data segment count */ 1877 if (prm->seg_cnt) 1878 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt); 1879 1880 if (prm->seg_cnt == 0) { 1881 /* No data transfer */ 1882 *dword_ptr++ = 0; 1883 *dword_ptr = 0; 1884 return; 1885 } 1886 1887 /* If scatter gather */ 1888 1889 /* Load command entry data segments */ 1890 for (cnt = 0; 1891 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; 1892 cnt++, prm->seg_cnt--) { 1893 *dword_ptr++ = 1894 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); 1895 if (enable_64bit_addressing) { 1896 *dword_ptr++ = 1897 cpu_to_le32(pci_dma_hi32( 1898 sg_dma_address(prm->sg))); 1899 } 1900 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1901 1902 prm->sg = sg_next(prm->sg); 1903 } 1904 1905 qlt_load_cont_data_segments(prm, vha); 1906 } 1907 1908 static inline int qlt_has_data(struct qla_tgt_cmd *cmd) 1909 { 1910 return cmd->bufflen > 0; 1911 } 1912 1913 /* 1914 * Called without ha->hardware_lock held 1915 */ 1916 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, 1917 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status, 1918 uint32_t *full_req_cnt) 1919 { 1920 struct qla_tgt *tgt = cmd->tgt; 1921 struct scsi_qla_host *vha = tgt->vha; 1922 struct qla_hw_data *ha = vha->hw; 1923 struct se_cmd *se_cmd = &cmd->se_cmd; 1924 1925 prm->cmd = cmd; 1926 prm->tgt = tgt; 1927 prm->rq_result = scsi_status; 1928 prm->sense_buffer = &cmd->sense_buffer[0]; 1929 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; 1930 prm->sg = NULL; 1931 prm->seg_cnt = -1; 1932 prm->req_cnt = 1; 1933 prm->add_status_pkt = 0; 1934 1935 /* Send marker if required */ 1936 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 1937 return -EFAULT; 1938 1939 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { 1940 if (qlt_pci_map_calc_cnt(prm) != 0) 1941 return -EAGAIN; 1942 } 1943 1944 *full_req_cnt = prm->req_cnt; 1945 1946 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { 1947 prm->residual = se_cmd->residual_count; 1948 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c, 1949 "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", 1950 prm->residual, se_cmd->tag, 1951 se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1952 cmd->bufflen, prm->rq_result); 1953 prm->rq_result |= SS_RESIDUAL_UNDER; 1954 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 1955 prm->residual = se_cmd->residual_count; 1956 ql_dbg(ql_dbg_io, vha, 0x305d, 1957 "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n", 1958 prm->residual, se_cmd->tag, se_cmd->t_task_cdb ? 1959 se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result); 1960 prm->rq_result |= SS_RESIDUAL_OVER; 1961 } 1962 1963 if (xmit_type & QLA_TGT_XMIT_STATUS) { 1964 /* 1965 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be 1966 * ignored in *xmit_response() below 1967 */ 1968 if (qlt_has_data(cmd)) { 1969 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || 1970 (IS_FWI2_CAPABLE(ha) && 1971 (prm->rq_result != 0))) { 1972 prm->add_status_pkt = 1; 1973 (*full_req_cnt)++; 1974 } 1975 } 1976 } 1977 1978 return 0; 1979 } 1980 1981 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, 1982 struct qla_tgt_cmd *cmd, int sending_sense) 1983 { 1984 if (ha->tgt.enable_class_2) 1985 return 0; 1986 1987 if (sending_sense) 1988 return cmd->conf_compl_supported; 1989 else 1990 return ha->tgt.enable_explicit_conf && 1991 cmd->conf_compl_supported; 1992 } 1993 1994 #ifdef CONFIG_QLA_TGT_DEBUG_SRR 1995 /* 1996 * Original taken from the XFS code 1997 */ 1998 static unsigned long qlt_srr_random(void) 1999 { 2000 static int Inited; 2001 static unsigned long RandomValue; 2002 static DEFINE_SPINLOCK(lock); 2003 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ 2004 register long rv; 2005 register long lo; 2006 register long hi; 2007 unsigned long flags; 2008 2009 spin_lock_irqsave(&lock, flags); 2010 if (!Inited) { 2011 RandomValue = jiffies; 2012 Inited = 1; 2013 } 2014 rv = RandomValue; 2015 hi = rv / 127773; 2016 lo = rv % 127773; 2017 rv = 16807 * lo - 2836 * hi; 2018 if (rv <= 0) 2019 rv += 2147483647; 2020 RandomValue = rv; 2021 spin_unlock_irqrestore(&lock, flags); 2022 return rv; 2023 } 2024 2025 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 2026 { 2027 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ 2028 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) 2029 == 50) { 2030 *xmit_type &= ~QLA_TGT_XMIT_STATUS; 2031 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, 2032 "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag); 2033 } 2034 #endif 2035 /* 2036 * It's currently not possible to simulate SRRs for FCP_WRITE without 2037 * a physical link layer failure, so don't even try here.. 2038 */ 2039 if (cmd->dma_data_direction != DMA_FROM_DEVICE) 2040 return; 2041 2042 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && 2043 ((qlt_srr_random() % 100) == 20)) { 2044 int i, leave = 0; 2045 unsigned int tot_len = 0; 2046 2047 while (leave == 0) 2048 leave = qlt_srr_random() % cmd->sg_cnt; 2049 2050 for (i = 0; i < leave; i++) 2051 tot_len += cmd->sg[i].length; 2052 2053 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, 2054 "Cutting cmd %p (tag %d) buffer" 2055 " tail to len %d, sg_cnt %d (cmd->bufflen %d," 2056 " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave, 2057 cmd->bufflen, cmd->sg_cnt); 2058 2059 cmd->bufflen = tot_len; 2060 cmd->sg_cnt = leave; 2061 } 2062 2063 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { 2064 unsigned int offset = qlt_srr_random() % cmd->bufflen; 2065 2066 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, 2067 "Cutting cmd %p (tag %d) buffer head " 2068 "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset, 2069 cmd->bufflen); 2070 if (offset == 0) 2071 *xmit_type &= ~QLA_TGT_XMIT_DATA; 2072 else if (qlt_set_data_offset(cmd, offset)) { 2073 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, 2074 "qlt_set_data_offset() failed (tag %d)", se_cmd->tag); 2075 } 2076 } 2077 } 2078 #else 2079 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 2080 {} 2081 #endif 2082 2083 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, 2084 struct qla_tgt_prm *prm) 2085 { 2086 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, 2087 (uint32_t)sizeof(ctio->u.status1.sense_data)); 2088 ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); 2089 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { 2090 ctio->u.status0.flags |= cpu_to_le16( 2091 CTIO7_FLAGS_EXPLICIT_CONFORM | 2092 CTIO7_FLAGS_CONFORM_REQ); 2093 } 2094 ctio->u.status0.residual = cpu_to_le32(prm->residual); 2095 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); 2096 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { 2097 int i; 2098 2099 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { 2100 if (prm->cmd->se_cmd.scsi_status != 0) { 2101 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, 2102 "Skipping EXPLICIT_CONFORM and " 2103 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " 2104 "non GOOD status\n"); 2105 goto skip_explict_conf; 2106 } 2107 ctio->u.status1.flags |= cpu_to_le16( 2108 CTIO7_FLAGS_EXPLICIT_CONFORM | 2109 CTIO7_FLAGS_CONFORM_REQ); 2110 } 2111 skip_explict_conf: 2112 ctio->u.status1.flags &= 2113 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2114 ctio->u.status1.flags |= 2115 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2116 ctio->u.status1.scsi_status |= 2117 cpu_to_le16(SS_SENSE_LEN_VALID); 2118 ctio->u.status1.sense_length = 2119 cpu_to_le16(prm->sense_buffer_len); 2120 for (i = 0; i < prm->sense_buffer_len/4; i++) 2121 ((uint32_t *)ctio->u.status1.sense_data)[i] = 2122 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); 2123 #if 0 2124 if (unlikely((prm->sense_buffer_len % 4) != 0)) { 2125 static int q; 2126 if (q < 10) { 2127 ql_dbg(ql_dbg_tgt, vha, 0xe04f, 2128 "qla_target(%d): %d bytes of sense " 2129 "lost", prm->tgt->ha->vp_idx, 2130 prm->sense_buffer_len % 4); 2131 q++; 2132 } 2133 } 2134 #endif 2135 } else { 2136 ctio->u.status1.flags &= 2137 ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2138 ctio->u.status1.flags |= 2139 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2140 ctio->u.status1.sense_length = 0; 2141 memset(ctio->u.status1.sense_data, 0, 2142 sizeof(ctio->u.status1.sense_data)); 2143 } 2144 2145 /* Sense with len > 24, is it possible ??? */ 2146 } 2147 2148 2149 2150 /* diff */ 2151 static inline int 2152 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd) 2153 { 2154 /* 2155 * Uncomment when corresponding SCSI changes are done. 2156 * 2157 if (!sp->cmd->prot_chk) 2158 return 0; 2159 * 2160 */ 2161 switch (se_cmd->prot_op) { 2162 case TARGET_PROT_DOUT_INSERT: 2163 case TARGET_PROT_DIN_STRIP: 2164 if (ql2xenablehba_err_chk >= 1) 2165 return 1; 2166 break; 2167 case TARGET_PROT_DOUT_PASS: 2168 case TARGET_PROT_DIN_PASS: 2169 if (ql2xenablehba_err_chk >= 2) 2170 return 1; 2171 break; 2172 case TARGET_PROT_DIN_INSERT: 2173 case TARGET_PROT_DOUT_STRIP: 2174 return 1; 2175 default: 2176 break; 2177 } 2178 return 0; 2179 } 2180 2181 /* 2182 * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command 2183 * 2184 */ 2185 static inline void 2186 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx) 2187 { 2188 uint32_t lba = 0xffffffff & se_cmd->t_task_lba; 2189 2190 /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2 2191 * have been immplemented by TCM, before AppTag is avail. 2192 * Look for modesense_handlers[] 2193 */ 2194 ctx->app_tag = 0; 2195 ctx->app_tag_mask[0] = 0x0; 2196 ctx->app_tag_mask[1] = 0x0; 2197 2198 switch (se_cmd->prot_type) { 2199 case TARGET_DIF_TYPE0_PROT: 2200 /* 2201 * No check for ql2xenablehba_err_chk, as it would be an 2202 * I/O error if hba tag generation is not done. 2203 */ 2204 ctx->ref_tag = cpu_to_le32(lba); 2205 2206 if (!qlt_hba_err_chk_enabled(se_cmd)) 2207 break; 2208 2209 /* enable ALL bytes of the ref tag */ 2210 ctx->ref_tag_mask[0] = 0xff; 2211 ctx->ref_tag_mask[1] = 0xff; 2212 ctx->ref_tag_mask[2] = 0xff; 2213 ctx->ref_tag_mask[3] = 0xff; 2214 break; 2215 /* 2216 * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and 2217 * 16 bit app tag. 2218 */ 2219 case TARGET_DIF_TYPE1_PROT: 2220 ctx->ref_tag = cpu_to_le32(lba); 2221 2222 if (!qlt_hba_err_chk_enabled(se_cmd)) 2223 break; 2224 2225 /* enable ALL bytes of the ref tag */ 2226 ctx->ref_tag_mask[0] = 0xff; 2227 ctx->ref_tag_mask[1] = 0xff; 2228 ctx->ref_tag_mask[2] = 0xff; 2229 ctx->ref_tag_mask[3] = 0xff; 2230 break; 2231 /* 2232 * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to 2233 * match LBA in CDB + N 2234 */ 2235 case TARGET_DIF_TYPE2_PROT: 2236 ctx->ref_tag = cpu_to_le32(lba); 2237 2238 if (!qlt_hba_err_chk_enabled(se_cmd)) 2239 break; 2240 2241 /* enable ALL bytes of the ref tag */ 2242 ctx->ref_tag_mask[0] = 0xff; 2243 ctx->ref_tag_mask[1] = 0xff; 2244 ctx->ref_tag_mask[2] = 0xff; 2245 ctx->ref_tag_mask[3] = 0xff; 2246 break; 2247 2248 /* For Type 3 protection: 16 bit GUARD only */ 2249 case TARGET_DIF_TYPE3_PROT: 2250 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] = 2251 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00; 2252 break; 2253 } 2254 } 2255 2256 2257 static inline int 2258 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha) 2259 { 2260 uint32_t *cur_dsd; 2261 uint32_t transfer_length = 0; 2262 uint32_t data_bytes; 2263 uint32_t dif_bytes; 2264 uint8_t bundling = 1; 2265 uint8_t *clr_ptr; 2266 struct crc_context *crc_ctx_pkt = NULL; 2267 struct qla_hw_data *ha; 2268 struct ctio_crc2_to_fw *pkt; 2269 dma_addr_t crc_ctx_dma; 2270 uint16_t fw_prot_opts = 0; 2271 struct qla_tgt_cmd *cmd = prm->cmd; 2272 struct se_cmd *se_cmd = &cmd->se_cmd; 2273 uint32_t h; 2274 struct atio_from_isp *atio = &prm->cmd->atio; 2275 uint16_t t16; 2276 2277 ha = vha->hw; 2278 2279 pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr; 2280 prm->pkt = pkt; 2281 memset(pkt, 0, sizeof(*pkt)); 2282 2283 ql_dbg(ql_dbg_tgt, vha, 0xe071, 2284 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n", 2285 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op, 2286 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba); 2287 2288 if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) || 2289 (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP)) 2290 bundling = 0; 2291 2292 /* Compute dif len and adjust data len to incude protection */ 2293 data_bytes = cmd->bufflen; 2294 dif_bytes = (data_bytes / cmd->blk_sz) * 8; 2295 2296 switch (se_cmd->prot_op) { 2297 case TARGET_PROT_DIN_INSERT: 2298 case TARGET_PROT_DOUT_STRIP: 2299 transfer_length = data_bytes; 2300 data_bytes += dif_bytes; 2301 break; 2302 2303 case TARGET_PROT_DIN_STRIP: 2304 case TARGET_PROT_DOUT_INSERT: 2305 case TARGET_PROT_DIN_PASS: 2306 case TARGET_PROT_DOUT_PASS: 2307 transfer_length = data_bytes + dif_bytes; 2308 break; 2309 2310 default: 2311 BUG(); 2312 break; 2313 } 2314 2315 if (!qlt_hba_err_chk_enabled(se_cmd)) 2316 fw_prot_opts |= 0x10; /* Disable Guard tag checking */ 2317 /* HBA error checking enabled */ 2318 else if (IS_PI_UNINIT_CAPABLE(ha)) { 2319 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) || 2320 (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT)) 2321 fw_prot_opts |= PO_DIS_VALD_APP_ESC; 2322 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT) 2323 fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC; 2324 } 2325 2326 switch (se_cmd->prot_op) { 2327 case TARGET_PROT_DIN_INSERT: 2328 case TARGET_PROT_DOUT_INSERT: 2329 fw_prot_opts |= PO_MODE_DIF_INSERT; 2330 break; 2331 case TARGET_PROT_DIN_STRIP: 2332 case TARGET_PROT_DOUT_STRIP: 2333 fw_prot_opts |= PO_MODE_DIF_REMOVE; 2334 break; 2335 case TARGET_PROT_DIN_PASS: 2336 case TARGET_PROT_DOUT_PASS: 2337 fw_prot_opts |= PO_MODE_DIF_PASS; 2338 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */ 2339 break; 2340 default:/* Normal Request */ 2341 fw_prot_opts |= PO_MODE_DIF_PASS; 2342 break; 2343 } 2344 2345 2346 /* ---- PKT ---- */ 2347 /* Update entry type to indicate Command Type CRC_2 IOCB */ 2348 pkt->entry_type = CTIO_CRC2; 2349 pkt->entry_count = 1; 2350 pkt->vp_index = vha->vp_idx; 2351 2352 h = qlt_make_handle(vha); 2353 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 2354 /* 2355 * CTIO type 7 from the firmware doesn't provide a way to 2356 * know the initiator's LOOP ID, hence we can't find 2357 * the session and, so, the command. 2358 */ 2359 return -EAGAIN; 2360 } else 2361 ha->tgt.cmds[h-1] = prm->cmd; 2362 2363 2364 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 2365 pkt->nport_handle = prm->cmd->loop_id; 2366 pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 2367 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2368 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2369 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2370 pkt->exchange_addr = atio->u.isp24.exchange_addr; 2371 2372 /* silence compile warning */ 2373 t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2374 pkt->ox_id = cpu_to_le16(t16); 2375 2376 t16 = (atio->u.isp24.attr << 9); 2377 pkt->flags |= cpu_to_le16(t16); 2378 pkt->relative_offset = cpu_to_le32(prm->cmd->offset); 2379 2380 /* Set transfer direction */ 2381 if (cmd->dma_data_direction == DMA_TO_DEVICE) 2382 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN); 2383 else if (cmd->dma_data_direction == DMA_FROM_DEVICE) 2384 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT); 2385 2386 2387 pkt->dseg_count = prm->tot_dsds; 2388 /* Fibre channel byte count */ 2389 pkt->transfer_length = cpu_to_le32(transfer_length); 2390 2391 2392 /* ----- CRC context -------- */ 2393 2394 /* Allocate CRC context from global pool */ 2395 crc_ctx_pkt = cmd->ctx = 2396 dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma); 2397 2398 if (!crc_ctx_pkt) 2399 goto crc_queuing_error; 2400 2401 /* Zero out CTX area. */ 2402 clr_ptr = (uint8_t *)crc_ctx_pkt; 2403 memset(clr_ptr, 0, sizeof(*crc_ctx_pkt)); 2404 2405 crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma; 2406 INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list); 2407 2408 /* Set handle */ 2409 crc_ctx_pkt->handle = pkt->handle; 2410 2411 qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt); 2412 2413 pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma)); 2414 pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma)); 2415 pkt->crc_context_len = CRC_CONTEXT_LEN_FW; 2416 2417 2418 if (!bundling) { 2419 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address; 2420 } else { 2421 /* 2422 * Configure Bundling if we need to fetch interlaving 2423 * protection PCI accesses 2424 */ 2425 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING; 2426 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes); 2427 crc_ctx_pkt->u.bundling.dseg_count = 2428 cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt); 2429 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address; 2430 } 2431 2432 /* Finish the common fields of CRC pkt */ 2433 crc_ctx_pkt->blk_size = cpu_to_le16(cmd->blk_sz); 2434 crc_ctx_pkt->prot_opts = cpu_to_le16(fw_prot_opts); 2435 crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes); 2436 crc_ctx_pkt->guard_seed = cpu_to_le16(0); 2437 2438 2439 /* Walks data segments */ 2440 pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR); 2441 2442 if (!bundling && prm->prot_seg_cnt) { 2443 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd, 2444 prm->tot_dsds, cmd)) 2445 goto crc_queuing_error; 2446 } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd, 2447 (prm->tot_dsds - prm->prot_seg_cnt), cmd)) 2448 goto crc_queuing_error; 2449 2450 if (bundling && prm->prot_seg_cnt) { 2451 /* Walks dif segments */ 2452 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA; 2453 2454 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address; 2455 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd, 2456 prm->prot_seg_cnt, cmd)) 2457 goto crc_queuing_error; 2458 } 2459 return QLA_SUCCESS; 2460 2461 crc_queuing_error: 2462 /* Cleanup will be performed by the caller */ 2463 2464 return QLA_FUNCTION_FAILED; 2465 } 2466 2467 2468 /* 2469 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * 2470 * QLA_TGT_XMIT_STATUS for >= 24xx silicon 2471 */ 2472 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, 2473 uint8_t scsi_status) 2474 { 2475 struct scsi_qla_host *vha = cmd->vha; 2476 struct qla_hw_data *ha = vha->hw; 2477 struct ctio7_to_24xx *pkt; 2478 struct qla_tgt_prm prm; 2479 uint32_t full_req_cnt = 0; 2480 unsigned long flags = 0; 2481 int res; 2482 2483 spin_lock_irqsave(&ha->hardware_lock, flags); 2484 if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 2485 cmd->state = QLA_TGT_STATE_PROCESSED; 2486 if (cmd->sess->logout_completed) 2487 /* no need to terminate. FW already freed exchange. */ 2488 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2489 else 2490 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 2491 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2492 return 0; 2493 } 2494 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2495 2496 memset(&prm, 0, sizeof(prm)); 2497 qlt_check_srr_debug(cmd, &xmit_type); 2498 2499 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, 2500 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n", 2501 (xmit_type & QLA_TGT_XMIT_STATUS) ? 2502 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction, 2503 &cmd->se_cmd); 2504 2505 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, 2506 &full_req_cnt); 2507 if (unlikely(res != 0)) { 2508 return res; 2509 } 2510 2511 spin_lock_irqsave(&ha->hardware_lock, flags); 2512 2513 if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) { 2514 /* 2515 * Either a chip reset is active or this request was from 2516 * previous life, just abort the processing. 2517 */ 2518 cmd->state = QLA_TGT_STATE_PROCESSED; 2519 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2520 ql_dbg(ql_dbg_async, vha, 0xe101, 2521 "RESET-RSP active/old-count/new-count = %d/%d/%d.\n", 2522 qla2x00_reset_active(vha), cmd->reset_count, 2523 ha->chip_reset); 2524 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2525 return 0; 2526 } 2527 2528 /* Does F/W have an IOCBs for this request */ 2529 res = qlt_check_reserve_free_req(vha, full_req_cnt); 2530 if (unlikely(res)) 2531 goto out_unmap_unlock; 2532 2533 if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA)) 2534 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2535 else 2536 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2537 if (unlikely(res != 0)) { 2538 vha->req->cnt += full_req_cnt; 2539 goto out_unmap_unlock; 2540 } 2541 2542 pkt = (struct ctio7_to_24xx *)prm.pkt; 2543 2544 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { 2545 pkt->u.status0.flags |= 2546 cpu_to_le16(CTIO7_FLAGS_DATA_IN | 2547 CTIO7_FLAGS_STATUS_MODE_0); 2548 2549 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2550 qlt_load_data_segments(&prm, vha); 2551 2552 if (prm.add_status_pkt == 0) { 2553 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2554 pkt->u.status0.scsi_status = 2555 cpu_to_le16(prm.rq_result); 2556 pkt->u.status0.residual = 2557 cpu_to_le32(prm.residual); 2558 pkt->u.status0.flags |= cpu_to_le16( 2559 CTIO7_FLAGS_SEND_STATUS); 2560 if (qlt_need_explicit_conf(ha, cmd, 0)) { 2561 pkt->u.status0.flags |= 2562 cpu_to_le16( 2563 CTIO7_FLAGS_EXPLICIT_CONFORM | 2564 CTIO7_FLAGS_CONFORM_REQ); 2565 } 2566 } 2567 2568 } else { 2569 /* 2570 * We have already made sure that there is sufficient 2571 * amount of request entries to not drop HW lock in 2572 * req_pkt(). 2573 */ 2574 struct ctio7_to_24xx *ctio = 2575 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); 2576 2577 ql_dbg(ql_dbg_io, vha, 0x305e, 2578 "Building additional status packet 0x%p.\n", 2579 ctio); 2580 2581 /* 2582 * T10Dif: ctio_crc2_to_fw overlay ontop of 2583 * ctio7_to_24xx 2584 */ 2585 memcpy(ctio, pkt, sizeof(*ctio)); 2586 /* reset back to CTIO7 */ 2587 ctio->entry_count = 1; 2588 ctio->entry_type = CTIO_TYPE7; 2589 ctio->dseg_count = 0; 2590 ctio->u.status1.flags &= ~cpu_to_le16( 2591 CTIO7_FLAGS_DATA_IN); 2592 2593 /* Real finish is ctio_m1's finish */ 2594 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; 2595 pkt->u.status0.flags |= cpu_to_le16( 2596 CTIO7_FLAGS_DONT_RET_CTIO); 2597 2598 /* qlt_24xx_init_ctio_to_isp will correct 2599 * all neccessary fields that's part of CTIO7. 2600 * There should be no residual of CTIO-CRC2 data. 2601 */ 2602 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, 2603 &prm); 2604 pr_debug("Status CTIO7: %p\n", ctio); 2605 } 2606 } else 2607 qlt_24xx_init_ctio_to_isp(pkt, &prm); 2608 2609 2610 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ 2611 cmd->cmd_sent_to_fw = 1; 2612 2613 /* Memory Barrier */ 2614 wmb(); 2615 qla2x00_start_iocbs(vha, vha->req); 2616 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2617 2618 return 0; 2619 2620 out_unmap_unlock: 2621 qlt_unmap_sg(vha, cmd); 2622 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2623 2624 return res; 2625 } 2626 EXPORT_SYMBOL(qlt_xmit_response); 2627 2628 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) 2629 { 2630 struct ctio7_to_24xx *pkt; 2631 struct scsi_qla_host *vha = cmd->vha; 2632 struct qla_hw_data *ha = vha->hw; 2633 struct qla_tgt *tgt = cmd->tgt; 2634 struct qla_tgt_prm prm; 2635 unsigned long flags; 2636 int res = 0; 2637 2638 memset(&prm, 0, sizeof(prm)); 2639 prm.cmd = cmd; 2640 prm.tgt = tgt; 2641 prm.sg = NULL; 2642 prm.req_cnt = 1; 2643 2644 /* Send marker if required */ 2645 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2646 return -EIO; 2647 2648 /* Calculate number of entries and segments required */ 2649 if (qlt_pci_map_calc_cnt(&prm) != 0) 2650 return -EAGAIN; 2651 2652 spin_lock_irqsave(&ha->hardware_lock, flags); 2653 2654 if (qla2x00_reset_active(vha) || (cmd->reset_count != ha->chip_reset) || 2655 (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) { 2656 /* 2657 * Either a chip reset is active or this request was from 2658 * previous life, just abort the processing. 2659 */ 2660 cmd->state = QLA_TGT_STATE_NEED_DATA; 2661 qlt_abort_cmd_on_host_reset(cmd->vha, cmd); 2662 ql_dbg(ql_dbg_async, vha, 0xe102, 2663 "RESET-XFR active/old-count/new-count = %d/%d/%d.\n", 2664 qla2x00_reset_active(vha), cmd->reset_count, 2665 ha->chip_reset); 2666 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2667 return 0; 2668 } 2669 2670 /* Does F/W have an IOCBs for this request */ 2671 res = qlt_check_reserve_free_req(vha, prm.req_cnt); 2672 if (res != 0) 2673 goto out_unlock_free_unmap; 2674 if (cmd->se_cmd.prot_op) 2675 res = qlt_build_ctio_crc2_pkt(&prm, vha); 2676 else 2677 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2678 2679 if (unlikely(res != 0)) { 2680 vha->req->cnt += prm.req_cnt; 2681 goto out_unlock_free_unmap; 2682 } 2683 2684 pkt = (struct ctio7_to_24xx *)prm.pkt; 2685 pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT | 2686 CTIO7_FLAGS_STATUS_MODE_0); 2687 2688 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) 2689 qlt_load_data_segments(&prm, vha); 2690 2691 cmd->state = QLA_TGT_STATE_NEED_DATA; 2692 cmd->cmd_sent_to_fw = 1; 2693 2694 /* Memory Barrier */ 2695 wmb(); 2696 qla2x00_start_iocbs(vha, vha->req); 2697 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2698 2699 return res; 2700 2701 out_unlock_free_unmap: 2702 qlt_unmap_sg(vha, cmd); 2703 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2704 2705 return res; 2706 } 2707 EXPORT_SYMBOL(qlt_rdy_to_xfer); 2708 2709 2710 /* 2711 * Checks the guard or meta-data for the type of error 2712 * detected by the HBA. 2713 */ 2714 static inline int 2715 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd, 2716 struct ctio_crc_from_fw *sts) 2717 { 2718 uint8_t *ap = &sts->actual_dif[0]; 2719 uint8_t *ep = &sts->expected_dif[0]; 2720 uint32_t e_ref_tag, a_ref_tag; 2721 uint16_t e_app_tag, a_app_tag; 2722 uint16_t e_guard, a_guard; 2723 uint64_t lba = cmd->se_cmd.t_task_lba; 2724 2725 a_guard = be16_to_cpu(*(uint16_t *)(ap + 0)); 2726 a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2)); 2727 a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4)); 2728 2729 e_guard = be16_to_cpu(*(uint16_t *)(ep + 0)); 2730 e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2)); 2731 e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4)); 2732 2733 ql_dbg(ql_dbg_tgt, vha, 0xe075, 2734 "iocb(s) %p Returned STATUS.\n", sts); 2735 2736 ql_dbg(ql_dbg_tgt, vha, 0xf075, 2737 "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", 2738 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2739 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard); 2740 2741 /* 2742 * Ignore sector if: 2743 * For type 3: ref & app tag is all 'f's 2744 * For type 0,1,2: app tag is all 'f's 2745 */ 2746 if ((a_app_tag == 0xffff) && 2747 ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) || 2748 (a_ref_tag == 0xffffffff))) { 2749 uint32_t blocks_done; 2750 2751 /* 2TB boundary case covered automatically with this */ 2752 blocks_done = e_ref_tag - (uint32_t)lba + 1; 2753 cmd->se_cmd.bad_sector = e_ref_tag; 2754 cmd->se_cmd.pi_err = 0; 2755 ql_dbg(ql_dbg_tgt, vha, 0xf074, 2756 "need to return scsi good\n"); 2757 2758 /* Update protection tag */ 2759 if (cmd->prot_sg_cnt) { 2760 uint32_t i, k = 0, num_ent; 2761 struct scatterlist *sg, *sgl; 2762 2763 2764 sgl = cmd->prot_sg; 2765 2766 /* Patch the corresponding protection tags */ 2767 for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) { 2768 num_ent = sg_dma_len(sg) / 8; 2769 if (k + num_ent < blocks_done) { 2770 k += num_ent; 2771 continue; 2772 } 2773 k = blocks_done; 2774 break; 2775 } 2776 2777 if (k != blocks_done) { 2778 ql_log(ql_log_warn, vha, 0xf076, 2779 "unexpected tag values tag:lba=%u:%llu)\n", 2780 e_ref_tag, (unsigned long long)lba); 2781 goto out; 2782 } 2783 2784 #if 0 2785 struct sd_dif_tuple *spt; 2786 /* TODO: 2787 * This section came from initiator. Is it valid here? 2788 * should ulp be override with actual val??? 2789 */ 2790 spt = page_address(sg_page(sg)) + sg->offset; 2791 spt += j; 2792 2793 spt->app_tag = 0xffff; 2794 if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3) 2795 spt->ref_tag = 0xffffffff; 2796 #endif 2797 } 2798 2799 return 0; 2800 } 2801 2802 /* check guard */ 2803 if (e_guard != a_guard) { 2804 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; 2805 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 2806 2807 ql_log(ql_log_warn, vha, 0xe076, 2808 "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", 2809 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2810 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2811 a_guard, e_guard, cmd); 2812 goto out; 2813 } 2814 2815 /* check ref tag */ 2816 if (e_ref_tag != a_ref_tag) { 2817 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 2818 cmd->se_cmd.bad_sector = e_ref_tag; 2819 2820 ql_log(ql_log_warn, vha, 0xe077, 2821 "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", 2822 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2823 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2824 a_guard, e_guard, cmd); 2825 goto out; 2826 } 2827 2828 /* check appl tag */ 2829 if (e_app_tag != a_app_tag) { 2830 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; 2831 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba; 2832 2833 ql_log(ql_log_warn, vha, 0xe078, 2834 "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", 2835 cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba, 2836 a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, 2837 a_guard, e_guard, cmd); 2838 goto out; 2839 } 2840 out: 2841 return 1; 2842 } 2843 2844 2845 /* If hardware_lock held on entry, might drop it, then reaquire */ 2846 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 2847 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha, 2848 struct imm_ntfy_from_isp *ntfy) 2849 { 2850 struct nack_to_isp *nack; 2851 struct qla_hw_data *ha = vha->hw; 2852 request_t *pkt; 2853 int ret = 0; 2854 2855 ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c, 2856 "Sending TERM ELS CTIO (ha=%p)\n", ha); 2857 2858 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); 2859 if (pkt == NULL) { 2860 ql_dbg(ql_dbg_tgt, vha, 0xe080, 2861 "qla_target(%d): %s failed: unable to allocate " 2862 "request packet\n", vha->vp_idx, __func__); 2863 return -ENOMEM; 2864 } 2865 2866 pkt->entry_type = NOTIFY_ACK_TYPE; 2867 pkt->entry_count = 1; 2868 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 2869 2870 nack = (struct nack_to_isp *)pkt; 2871 nack->ox_id = ntfy->ox_id; 2872 2873 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 2874 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 2875 nack->u.isp24.flags = ntfy->u.isp24.flags & 2876 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 2877 } 2878 2879 /* terminate */ 2880 nack->u.isp24.flags |= 2881 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE); 2882 2883 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 2884 nack->u.isp24.status = ntfy->u.isp24.status; 2885 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 2886 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 2887 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 2888 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 2889 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 2890 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 2891 2892 qla2x00_start_iocbs(vha, vha->req); 2893 return ret; 2894 } 2895 2896 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha, 2897 struct imm_ntfy_from_isp *imm, int ha_locked) 2898 { 2899 unsigned long flags = 0; 2900 int rc; 2901 2902 if (qlt_issue_marker(vha, ha_locked) < 0) 2903 return; 2904 2905 if (ha_locked) { 2906 rc = __qlt_send_term_imm_notif(vha, imm); 2907 2908 #if 0 /* Todo */ 2909 if (rc == -ENOMEM) 2910 qlt_alloc_qfull_cmd(vha, imm, 0, 0); 2911 #endif 2912 goto done; 2913 } 2914 2915 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 2916 rc = __qlt_send_term_imm_notif(vha, imm); 2917 2918 #if 0 /* Todo */ 2919 if (rc == -ENOMEM) 2920 qlt_alloc_qfull_cmd(vha, imm, 0, 0); 2921 #endif 2922 2923 done: 2924 if (!ha_locked) 2925 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 2926 } 2927 2928 /* If hardware_lock held on entry, might drop it, then reaquire */ 2929 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 2930 static int __qlt_send_term_exchange(struct scsi_qla_host *vha, 2931 struct qla_tgt_cmd *cmd, 2932 struct atio_from_isp *atio) 2933 { 2934 struct ctio7_to_24xx *ctio24; 2935 struct qla_hw_data *ha = vha->hw; 2936 request_t *pkt; 2937 int ret = 0; 2938 uint16_t temp; 2939 2940 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); 2941 2942 pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL); 2943 if (pkt == NULL) { 2944 ql_dbg(ql_dbg_tgt, vha, 0xe050, 2945 "qla_target(%d): %s failed: unable to allocate " 2946 "request packet\n", vha->vp_idx, __func__); 2947 return -ENOMEM; 2948 } 2949 2950 if (cmd != NULL) { 2951 if (cmd->state < QLA_TGT_STATE_PROCESSED) { 2952 ql_dbg(ql_dbg_tgt, vha, 0xe051, 2953 "qla_target(%d): Terminating cmd %p with " 2954 "incorrect state %d\n", vha->vp_idx, cmd, 2955 cmd->state); 2956 } else 2957 ret = 1; 2958 } 2959 2960 pkt->entry_count = 1; 2961 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 2962 2963 ctio24 = (struct ctio7_to_24xx *)pkt; 2964 ctio24->entry_type = CTIO_TYPE7; 2965 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED; 2966 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 2967 ctio24->vp_index = vha->vp_idx; 2968 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2969 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2970 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2971 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 2972 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 2973 cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 2974 CTIO7_FLAGS_TERMINATE); 2975 temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id); 2976 ctio24->u.status1.ox_id = cpu_to_le16(temp); 2977 2978 /* Most likely, it isn't needed */ 2979 ctio24->u.status1.residual = get_unaligned((uint32_t *) 2980 &atio->u.isp24.fcp_cmnd.add_cdb[ 2981 atio->u.isp24.fcp_cmnd.add_cdb_len]); 2982 if (ctio24->u.status1.residual != 0) 2983 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 2984 2985 /* Memory Barrier */ 2986 wmb(); 2987 qla2x00_start_iocbs(vha, vha->req); 2988 return ret; 2989 } 2990 2991 static void qlt_send_term_exchange(struct scsi_qla_host *vha, 2992 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked) 2993 { 2994 unsigned long flags = 0; 2995 int rc; 2996 2997 if (qlt_issue_marker(vha, ha_locked) < 0) 2998 return; 2999 3000 if (ha_locked) { 3001 rc = __qlt_send_term_exchange(vha, cmd, atio); 3002 if (rc == -ENOMEM) 3003 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 3004 goto done; 3005 } 3006 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 3007 rc = __qlt_send_term_exchange(vha, cmd, atio); 3008 if (rc == -ENOMEM) 3009 qlt_alloc_qfull_cmd(vha, atio, 0, 0); 3010 3011 done: 3012 if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) || 3013 !cmd->cmd_sent_to_fw)) { 3014 if (cmd->sg_mapped) 3015 qlt_unmap_sg(vha, cmd); 3016 vha->hw->tgt.tgt_ops->free_cmd(cmd); 3017 } 3018 3019 if (!ha_locked) 3020 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 3021 3022 return; 3023 } 3024 3025 static void qlt_init_term_exchange(struct scsi_qla_host *vha) 3026 { 3027 struct list_head free_list; 3028 struct qla_tgt_cmd *cmd, *tcmd; 3029 3030 vha->hw->tgt.leak_exchg_thresh_hold = 3031 (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT; 3032 3033 cmd = tcmd = NULL; 3034 if (!list_empty(&vha->hw->tgt.q_full_list)) { 3035 INIT_LIST_HEAD(&free_list); 3036 list_splice_init(&vha->hw->tgt.q_full_list, &free_list); 3037 3038 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 3039 list_del(&cmd->cmd_list); 3040 /* This cmd was never sent to TCM. There is no need 3041 * to schedule free or call free_cmd 3042 */ 3043 qlt_free_cmd(cmd); 3044 vha->hw->tgt.num_qfull_cmds_alloc--; 3045 } 3046 } 3047 vha->hw->tgt.num_qfull_cmds_dropped = 0; 3048 } 3049 3050 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha) 3051 { 3052 uint32_t total_leaked; 3053 3054 total_leaked = vha->hw->tgt.num_qfull_cmds_dropped; 3055 3056 if (vha->hw->tgt.leak_exchg_thresh_hold && 3057 (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) { 3058 3059 ql_dbg(ql_dbg_tgt, vha, 0xe079, 3060 "Chip reset due to exchange starvation: %d/%d.\n", 3061 total_leaked, vha->hw->fw_xcb_count); 3062 3063 if (IS_P3P_TYPE(vha->hw)) 3064 set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags); 3065 else 3066 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 3067 qla2xxx_wake_dpc(vha); 3068 } 3069 3070 } 3071 3072 void qlt_abort_cmd(struct qla_tgt_cmd *cmd) 3073 { 3074 struct qla_tgt *tgt = cmd->tgt; 3075 struct scsi_qla_host *vha = tgt->vha; 3076 struct se_cmd *se_cmd = &cmd->se_cmd; 3077 3078 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, 3079 "qla_target(%d): terminating exchange for aborted cmd=%p " 3080 "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd, 3081 se_cmd->tag); 3082 3083 cmd->state = QLA_TGT_STATE_ABORTED; 3084 cmd->cmd_flags |= BIT_6; 3085 3086 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0); 3087 } 3088 EXPORT_SYMBOL(qlt_abort_cmd); 3089 3090 void qlt_free_cmd(struct qla_tgt_cmd *cmd) 3091 { 3092 struct qla_tgt_sess *sess = cmd->sess; 3093 3094 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074, 3095 "%s: se_cmd[%p] ox_id %04x\n", 3096 __func__, &cmd->se_cmd, 3097 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 3098 3099 BUG_ON(cmd->cmd_in_wq); 3100 3101 if (!cmd->q_full) 3102 qlt_decr_num_pend_cmds(cmd->vha); 3103 3104 BUG_ON(cmd->sg_mapped); 3105 cmd->jiffies_at_free = get_jiffies_64(); 3106 if (unlikely(cmd->free_sg)) 3107 kfree(cmd->sg); 3108 3109 if (!sess || !sess->se_sess) { 3110 WARN_ON(1); 3111 return; 3112 } 3113 cmd->jiffies_at_free = get_jiffies_64(); 3114 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3115 } 3116 EXPORT_SYMBOL(qlt_free_cmd); 3117 3118 /* ha->hardware_lock supposed to be held on entry */ 3119 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, 3120 struct qla_tgt_cmd *cmd, void *ctio) 3121 { 3122 struct qla_tgt_srr_ctio *sc; 3123 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3124 struct qla_tgt_srr_imm *imm; 3125 3126 tgt->ctio_srr_id++; 3127 cmd->cmd_flags |= BIT_15; 3128 3129 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, 3130 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); 3131 3132 if (!ctio) { 3133 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, 3134 "qla_target(%d): SRR CTIO, but ctio is NULL\n", 3135 vha->vp_idx); 3136 return -EINVAL; 3137 } 3138 3139 sc = kzalloc(sizeof(*sc), GFP_ATOMIC); 3140 if (sc != NULL) { 3141 sc->cmd = cmd; 3142 /* IRQ is already OFF */ 3143 spin_lock(&tgt->srr_lock); 3144 sc->srr_id = tgt->ctio_srr_id; 3145 list_add_tail(&sc->srr_list_entry, 3146 &tgt->srr_ctio_list); 3147 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, 3148 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); 3149 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 3150 int found = 0; 3151 list_for_each_entry(imm, &tgt->srr_imm_list, 3152 srr_list_entry) { 3153 if (imm->srr_id == sc->srr_id) { 3154 found = 1; 3155 break; 3156 } 3157 } 3158 if (found) { 3159 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, 3160 "Scheduling srr work\n"); 3161 schedule_work(&tgt->srr_work); 3162 } else { 3163 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, 3164 "qla_target(%d): imm_srr_id " 3165 "== ctio_srr_id (%d), but there is no " 3166 "corresponding SRR IMM, deleting CTIO " 3167 "SRR %p\n", vha->vp_idx, 3168 tgt->ctio_srr_id, sc); 3169 list_del(&sc->srr_list_entry); 3170 spin_unlock(&tgt->srr_lock); 3171 3172 kfree(sc); 3173 return -EINVAL; 3174 } 3175 } 3176 spin_unlock(&tgt->srr_lock); 3177 } else { 3178 struct qla_tgt_srr_imm *ti; 3179 3180 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, 3181 "qla_target(%d): Unable to allocate SRR CTIO entry\n", 3182 vha->vp_idx); 3183 spin_lock(&tgt->srr_lock); 3184 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, 3185 srr_list_entry) { 3186 if (imm->srr_id == tgt->ctio_srr_id) { 3187 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, 3188 "IMM SRR %p deleted (id %d)\n", 3189 imm, imm->srr_id); 3190 list_del(&imm->srr_list_entry); 3191 qlt_reject_free_srr_imm(vha, imm, 1); 3192 } 3193 } 3194 spin_unlock(&tgt->srr_lock); 3195 3196 return -ENOMEM; 3197 } 3198 3199 return 0; 3200 } 3201 3202 /* 3203 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3204 */ 3205 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, 3206 struct qla_tgt_cmd *cmd, uint32_t status) 3207 { 3208 int term = 0; 3209 3210 if (ctio != NULL) { 3211 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; 3212 term = !(c->flags & 3213 cpu_to_le16(OF_TERM_EXCH)); 3214 } else 3215 term = 1; 3216 3217 if (term) 3218 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 3219 3220 return term; 3221 } 3222 3223 /* ha->hardware_lock supposed to be held on entry */ 3224 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, 3225 uint32_t handle) 3226 { 3227 struct qla_hw_data *ha = vha->hw; 3228 3229 handle--; 3230 if (ha->tgt.cmds[handle] != NULL) { 3231 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; 3232 ha->tgt.cmds[handle] = NULL; 3233 return cmd; 3234 } else 3235 return NULL; 3236 } 3237 3238 /* ha->hardware_lock supposed to be held on entry */ 3239 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, 3240 uint32_t handle, void *ctio) 3241 { 3242 struct qla_tgt_cmd *cmd = NULL; 3243 3244 /* Clear out internal marks */ 3245 handle &= ~(CTIO_COMPLETION_HANDLE_MARK | 3246 CTIO_INTERMEDIATE_HANDLE_MARK); 3247 3248 if (handle != QLA_TGT_NULL_HANDLE) { 3249 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) 3250 return NULL; 3251 3252 /* handle-1 is actually used */ 3253 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) { 3254 ql_dbg(ql_dbg_tgt, vha, 0xe052, 3255 "qla_target(%d): Wrong handle %x received\n", 3256 vha->vp_idx, handle); 3257 return NULL; 3258 } 3259 cmd = qlt_get_cmd(vha, handle); 3260 if (unlikely(cmd == NULL)) { 3261 ql_dbg(ql_dbg_tgt, vha, 0xe053, 3262 "qla_target(%d): Suspicious: unable to " 3263 "find the command with handle %x\n", vha->vp_idx, 3264 handle); 3265 return NULL; 3266 } 3267 } else if (ctio != NULL) { 3268 /* We can't get loop ID from CTIO7 */ 3269 ql_dbg(ql_dbg_tgt, vha, 0xe054, 3270 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " 3271 "support NULL handles\n", vha->vp_idx); 3272 return NULL; 3273 } 3274 3275 return cmd; 3276 } 3277 3278 /* hardware_lock should be held by caller. */ 3279 static void 3280 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd) 3281 { 3282 struct qla_hw_data *ha = vha->hw; 3283 uint32_t handle; 3284 3285 if (cmd->sg_mapped) 3286 qlt_unmap_sg(vha, cmd); 3287 3288 handle = qlt_make_handle(vha); 3289 3290 /* TODO: fix debug message type and ids. */ 3291 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3292 ql_dbg(ql_dbg_io, vha, 0xff00, 3293 "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle); 3294 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3295 cmd->write_data_transferred = 0; 3296 cmd->state = QLA_TGT_STATE_DATA_IN; 3297 3298 ql_dbg(ql_dbg_io, vha, 0xff01, 3299 "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle); 3300 3301 ha->tgt.tgt_ops->handle_data(cmd); 3302 return; 3303 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 3304 ql_dbg(ql_dbg_io, vha, 0xff02, 3305 "HOST-ABORT: handle=%d, state=ABORTED.\n", handle); 3306 } else { 3307 ql_dbg(ql_dbg_io, vha, 0xff03, 3308 "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle, 3309 cmd->state); 3310 dump_stack(); 3311 } 3312 3313 cmd->cmd_flags |= BIT_17; 3314 ha->tgt.tgt_ops->free_cmd(cmd); 3315 } 3316 3317 void 3318 qlt_host_reset_handler(struct qla_hw_data *ha) 3319 { 3320 struct qla_tgt_cmd *cmd; 3321 unsigned long flags; 3322 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 3323 scsi_qla_host_t *vha = NULL; 3324 struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt; 3325 uint32_t i; 3326 3327 if (!base_vha->hw->tgt.tgt_ops) 3328 return; 3329 3330 if (!tgt || qla_ini_mode_enabled(base_vha)) { 3331 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003, 3332 "Target mode disabled\n"); 3333 return; 3334 } 3335 3336 ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10, 3337 "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n", 3338 base_vha->dpc_flags); 3339 3340 spin_lock_irqsave(&ha->hardware_lock, flags); 3341 for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) { 3342 cmd = qlt_get_cmd(base_vha, i); 3343 if (!cmd) 3344 continue; 3345 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */ 3346 vha = cmd->vha; 3347 qlt_abort_cmd_on_host_reset(vha, cmd); 3348 } 3349 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3350 } 3351 3352 3353 /* 3354 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3355 */ 3356 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, 3357 uint32_t status, void *ctio) 3358 { 3359 struct qla_hw_data *ha = vha->hw; 3360 struct se_cmd *se_cmd; 3361 struct qla_tgt_cmd *cmd; 3362 3363 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { 3364 /* That could happen only in case of an error/reset/abort */ 3365 if (status != CTIO_SUCCESS) { 3366 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, 3367 "Intermediate CTIO received" 3368 " (status %x)\n", status); 3369 } 3370 return; 3371 } 3372 3373 cmd = qlt_ctio_to_cmd(vha, handle, ctio); 3374 if (cmd == NULL) 3375 return; 3376 3377 se_cmd = &cmd->se_cmd; 3378 cmd->cmd_sent_to_fw = 0; 3379 3380 qlt_unmap_sg(vha, cmd); 3381 3382 if (unlikely(status != CTIO_SUCCESS)) { 3383 switch (status & 0xFFFF) { 3384 case CTIO_LIP_RESET: 3385 case CTIO_TARGET_RESET: 3386 case CTIO_ABORTED: 3387 /* driver request abort via Terminate exchange */ 3388 case CTIO_TIMEOUT: 3389 case CTIO_INVALID_RX_ID: 3390 /* They are OK */ 3391 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, 3392 "qla_target(%d): CTIO with " 3393 "status %#x received, state %x, se_cmd %p, " 3394 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " 3395 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, 3396 status, cmd->state, se_cmd); 3397 break; 3398 3399 case CTIO_PORT_LOGGED_OUT: 3400 case CTIO_PORT_UNAVAILABLE: 3401 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, 3402 "qla_target(%d): CTIO with PORT LOGGED " 3403 "OUT (29) or PORT UNAVAILABLE (28) status %x " 3404 "received (state %x, se_cmd %p)\n", vha->vp_idx, 3405 status, cmd->state, se_cmd); 3406 break; 3407 3408 case CTIO_SRR_RECEIVED: 3409 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, 3410 "qla_target(%d): CTIO with SRR_RECEIVED" 3411 " status %x received (state %x, se_cmd %p)\n", 3412 vha->vp_idx, status, cmd->state, se_cmd); 3413 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) 3414 break; 3415 else 3416 return; 3417 3418 case CTIO_DIF_ERROR: { 3419 struct ctio_crc_from_fw *crc = 3420 (struct ctio_crc_from_fw *)ctio; 3421 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073, 3422 "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n", 3423 vha->vp_idx, status, cmd->state, se_cmd, 3424 *((u64 *)&crc->actual_dif[0]), 3425 *((u64 *)&crc->expected_dif[0])); 3426 3427 if (qlt_handle_dif_error(vha, cmd, ctio)) { 3428 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3429 /* scsi Write/xfer rdy complete */ 3430 goto skip_term; 3431 } else { 3432 /* scsi read/xmit respond complete 3433 * call handle dif to send scsi status 3434 * rather than terminate exchange. 3435 */ 3436 cmd->state = QLA_TGT_STATE_PROCESSED; 3437 ha->tgt.tgt_ops->handle_dif_err(cmd); 3438 return; 3439 } 3440 } else { 3441 /* Need to generate a SCSI good completion. 3442 * because FW did not send scsi status. 3443 */ 3444 status = 0; 3445 goto skip_term; 3446 } 3447 break; 3448 } 3449 default: 3450 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, 3451 "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n", 3452 vha->vp_idx, status, cmd->state, se_cmd); 3453 break; 3454 } 3455 3456 3457 /* "cmd->state == QLA_TGT_STATE_ABORTED" means 3458 * cmd is already aborted/terminated, we don't 3459 * need to terminate again. The exchange is already 3460 * cleaned up/freed at FW level. Just cleanup at driver 3461 * level. 3462 */ 3463 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) && 3464 (cmd->state != QLA_TGT_STATE_ABORTED)) { 3465 cmd->cmd_flags |= BIT_13; 3466 if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) 3467 return; 3468 } 3469 } 3470 skip_term: 3471 3472 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 3473 cmd->cmd_flags |= BIT_12; 3474 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3475 cmd->state = QLA_TGT_STATE_DATA_IN; 3476 3477 if (status == CTIO_SUCCESS) 3478 cmd->write_data_transferred = 1; 3479 3480 ha->tgt.tgt_ops->handle_data(cmd); 3481 return; 3482 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 3483 cmd->cmd_flags |= BIT_18; 3484 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, 3485 "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag); 3486 } else { 3487 cmd->cmd_flags |= BIT_19; 3488 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, 3489 "qla_target(%d): A command in state (%d) should " 3490 "not return a CTIO complete\n", vha->vp_idx, cmd->state); 3491 } 3492 3493 if (unlikely(status != CTIO_SUCCESS) && 3494 (cmd->state != QLA_TGT_STATE_ABORTED)) { 3495 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); 3496 dump_stack(); 3497 } 3498 3499 ha->tgt.tgt_ops->free_cmd(cmd); 3500 } 3501 3502 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, 3503 uint8_t task_codes) 3504 { 3505 int fcp_task_attr; 3506 3507 switch (task_codes) { 3508 case ATIO_SIMPLE_QUEUE: 3509 fcp_task_attr = TCM_SIMPLE_TAG; 3510 break; 3511 case ATIO_HEAD_OF_QUEUE: 3512 fcp_task_attr = TCM_HEAD_TAG; 3513 break; 3514 case ATIO_ORDERED_QUEUE: 3515 fcp_task_attr = TCM_ORDERED_TAG; 3516 break; 3517 case ATIO_ACA_QUEUE: 3518 fcp_task_attr = TCM_ACA_TAG; 3519 break; 3520 case ATIO_UNTAGGED: 3521 fcp_task_attr = TCM_SIMPLE_TAG; 3522 break; 3523 default: 3524 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, 3525 "qla_target: unknown task code %x, use ORDERED instead\n", 3526 task_codes); 3527 fcp_task_attr = TCM_ORDERED_TAG; 3528 break; 3529 } 3530 3531 return fcp_task_attr; 3532 } 3533 3534 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, 3535 uint8_t *); 3536 /* 3537 * Process context for I/O path into tcm_qla2xxx code 3538 */ 3539 static void __qlt_do_work(struct qla_tgt_cmd *cmd) 3540 { 3541 scsi_qla_host_t *vha = cmd->vha; 3542 struct qla_hw_data *ha = vha->hw; 3543 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3544 struct qla_tgt_sess *sess = cmd->sess; 3545 struct atio_from_isp *atio = &cmd->atio; 3546 unsigned char *cdb; 3547 unsigned long flags; 3548 uint32_t data_length; 3549 int ret, fcp_task_attr, data_dir, bidi = 0; 3550 3551 cmd->cmd_in_wq = 0; 3552 cmd->cmd_flags |= BIT_1; 3553 if (tgt->tgt_stop) 3554 goto out_term; 3555 3556 if (cmd->state == QLA_TGT_STATE_ABORTED) { 3557 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082, 3558 "cmd with tag %u is aborted\n", 3559 cmd->atio.u.isp24.exchange_addr); 3560 goto out_term; 3561 } 3562 3563 cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; 3564 cmd->se_cmd.tag = atio->u.isp24.exchange_addr; 3565 cmd->unpacked_lun = scsilun_to_int( 3566 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); 3567 3568 if (atio->u.isp24.fcp_cmnd.rddata && 3569 atio->u.isp24.fcp_cmnd.wrdata) { 3570 bidi = 1; 3571 data_dir = DMA_TO_DEVICE; 3572 } else if (atio->u.isp24.fcp_cmnd.rddata) 3573 data_dir = DMA_FROM_DEVICE; 3574 else if (atio->u.isp24.fcp_cmnd.wrdata) 3575 data_dir = DMA_TO_DEVICE; 3576 else 3577 data_dir = DMA_NONE; 3578 3579 fcp_task_attr = qlt_get_fcp_task_attr(vha, 3580 atio->u.isp24.fcp_cmnd.task_attr); 3581 data_length = be32_to_cpu(get_unaligned((uint32_t *) 3582 &atio->u.isp24.fcp_cmnd.add_cdb[ 3583 atio->u.isp24.fcp_cmnd.add_cdb_len])); 3584 3585 ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, 3586 fcp_task_attr, data_dir, bidi); 3587 if (ret != 0) 3588 goto out_term; 3589 /* 3590 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( 3591 */ 3592 spin_lock_irqsave(&ha->hardware_lock, flags); 3593 ha->tgt.tgt_ops->put_sess(sess); 3594 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3595 return; 3596 3597 out_term: 3598 ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd); 3599 /* 3600 * cmd has not sent to target yet, so pass NULL as the second 3601 * argument to qlt_send_term_exchange() and free the memory here. 3602 */ 3603 cmd->cmd_flags |= BIT_2; 3604 spin_lock_irqsave(&ha->hardware_lock, flags); 3605 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1); 3606 3607 qlt_decr_num_pend_cmds(vha); 3608 percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag); 3609 ha->tgt.tgt_ops->put_sess(sess); 3610 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3611 } 3612 3613 static void qlt_do_work(struct work_struct *work) 3614 { 3615 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 3616 scsi_qla_host_t *vha = cmd->vha; 3617 unsigned long flags; 3618 3619 spin_lock_irqsave(&vha->cmd_list_lock, flags); 3620 list_del(&cmd->cmd_list); 3621 spin_unlock_irqrestore(&vha->cmd_list_lock, flags); 3622 3623 __qlt_do_work(cmd); 3624 } 3625 3626 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha, 3627 struct qla_tgt_sess *sess, 3628 struct atio_from_isp *atio) 3629 { 3630 struct se_session *se_sess = sess->se_sess; 3631 struct qla_tgt_cmd *cmd; 3632 int tag; 3633 3634 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 3635 if (tag < 0) 3636 return NULL; 3637 3638 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 3639 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 3640 3641 memcpy(&cmd->atio, atio, sizeof(*atio)); 3642 cmd->state = QLA_TGT_STATE_NEW; 3643 cmd->tgt = vha->vha_tgt.qla_tgt; 3644 qlt_incr_num_pend_cmds(vha); 3645 cmd->vha = vha; 3646 cmd->se_cmd.map_tag = tag; 3647 cmd->sess = sess; 3648 cmd->loop_id = sess->loop_id; 3649 cmd->conf_compl_supported = sess->conf_compl_supported; 3650 3651 cmd->cmd_flags = 0; 3652 cmd->jiffies_at_alloc = get_jiffies_64(); 3653 3654 cmd->reset_count = vha->hw->chip_reset; 3655 3656 return cmd; 3657 } 3658 3659 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *, 3660 uint16_t); 3661 3662 static void qlt_create_sess_from_atio(struct work_struct *work) 3663 { 3664 struct qla_tgt_sess_op *op = container_of(work, 3665 struct qla_tgt_sess_op, work); 3666 scsi_qla_host_t *vha = op->vha; 3667 struct qla_hw_data *ha = vha->hw; 3668 struct qla_tgt_sess *sess; 3669 struct qla_tgt_cmd *cmd; 3670 unsigned long flags; 3671 uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id; 3672 3673 spin_lock_irqsave(&vha->cmd_list_lock, flags); 3674 list_del(&op->cmd_list); 3675 spin_unlock_irqrestore(&vha->cmd_list_lock, flags); 3676 3677 if (op->aborted) { 3678 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083, 3679 "sess_op with tag %u is aborted\n", 3680 op->atio.u.isp24.exchange_addr); 3681 goto out_term; 3682 } 3683 3684 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, 3685 "qla_target(%d): Unable to find wwn login" 3686 " (s_id %x:%x:%x), trying to create it manually\n", 3687 vha->vp_idx, s_id[0], s_id[1], s_id[2]); 3688 3689 if (op->atio.u.raw.entry_count > 1) { 3690 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, 3691 "Dropping multy entry atio %p\n", &op->atio); 3692 goto out_term; 3693 } 3694 3695 mutex_lock(&vha->vha_tgt.tgt_mutex); 3696 sess = qlt_make_local_sess(vha, s_id); 3697 /* sess has an extra creation ref. */ 3698 mutex_unlock(&vha->vha_tgt.tgt_mutex); 3699 3700 if (!sess) 3701 goto out_term; 3702 /* 3703 * Now obtain a pre-allocated session tag using the original op->atio 3704 * packet header, and dispatch into __qlt_do_work() using the existing 3705 * process context. 3706 */ 3707 cmd = qlt_get_tag(vha, sess, &op->atio); 3708 if (!cmd) { 3709 spin_lock_irqsave(&ha->hardware_lock, flags); 3710 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY); 3711 ha->tgt.tgt_ops->put_sess(sess); 3712 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3713 kfree(op); 3714 return; 3715 } 3716 /* 3717 * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release 3718 * the extra reference taken above by qlt_make_local_sess() 3719 */ 3720 __qlt_do_work(cmd); 3721 kfree(op); 3722 return; 3723 3724 out_term: 3725 spin_lock_irqsave(&ha->hardware_lock, flags); 3726 qlt_send_term_exchange(vha, NULL, &op->atio, 1); 3727 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3728 kfree(op); 3729 3730 } 3731 3732 /* ha->hardware_lock supposed to be held on entry */ 3733 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, 3734 struct atio_from_isp *atio) 3735 { 3736 struct qla_hw_data *ha = vha->hw; 3737 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 3738 struct qla_tgt_sess *sess; 3739 struct qla_tgt_cmd *cmd; 3740 3741 if (unlikely(tgt->tgt_stop)) { 3742 ql_dbg(ql_dbg_io, vha, 0x3061, 3743 "New command while device %p is shutting down\n", tgt); 3744 return -EFAULT; 3745 } 3746 3747 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id); 3748 if (unlikely(!sess)) { 3749 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op), 3750 GFP_ATOMIC); 3751 if (!op) 3752 return -ENOMEM; 3753 3754 memcpy(&op->atio, atio, sizeof(*atio)); 3755 op->vha = vha; 3756 3757 spin_lock(&vha->cmd_list_lock); 3758 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list); 3759 spin_unlock(&vha->cmd_list_lock); 3760 3761 INIT_WORK(&op->work, qlt_create_sess_from_atio); 3762 queue_work(qla_tgt_wq, &op->work); 3763 return 0; 3764 } 3765 3766 /* Another WWN used to have our s_id. Our PLOGI scheduled its 3767 * session deletion, but it's still in sess_del_work wq */ 3768 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 3769 ql_dbg(ql_dbg_io, vha, 0x3061, 3770 "New command while old session %p is being deleted\n", 3771 sess); 3772 return -EFAULT; 3773 } 3774 3775 /* 3776 * Do kref_get() before returning + dropping qla_hw_data->hardware_lock. 3777 */ 3778 kref_get(&sess->se_sess->sess_kref); 3779 3780 cmd = qlt_get_tag(vha, sess, atio); 3781 if (!cmd) { 3782 ql_dbg(ql_dbg_io, vha, 0x3062, 3783 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); 3784 ha->tgt.tgt_ops->put_sess(sess); 3785 return -ENOMEM; 3786 } 3787 3788 cmd->cmd_in_wq = 1; 3789 cmd->cmd_flags |= BIT_0; 3790 3791 spin_lock(&vha->cmd_list_lock); 3792 list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list); 3793 spin_unlock(&vha->cmd_list_lock); 3794 3795 INIT_WORK(&cmd->work, qlt_do_work); 3796 queue_work(qla_tgt_wq, &cmd->work); 3797 return 0; 3798 3799 } 3800 3801 /* ha->hardware_lock supposed to be held on entry */ 3802 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 3803 int fn, void *iocb, int flags) 3804 { 3805 struct scsi_qla_host *vha = sess->vha; 3806 struct qla_hw_data *ha = vha->hw; 3807 struct qla_tgt_mgmt_cmd *mcmd; 3808 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3809 int res; 3810 uint8_t tmr_func; 3811 3812 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 3813 if (!mcmd) { 3814 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, 3815 "qla_target(%d): Allocation of management " 3816 "command failed, some commands and their data could " 3817 "leak\n", vha->vp_idx); 3818 return -ENOMEM; 3819 } 3820 memset(mcmd, 0, sizeof(*mcmd)); 3821 mcmd->sess = sess; 3822 3823 if (iocb) { 3824 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 3825 sizeof(mcmd->orig_iocb.imm_ntfy)); 3826 } 3827 mcmd->tmr_func = fn; 3828 mcmd->flags = flags; 3829 mcmd->reset_count = vha->hw->chip_reset; 3830 3831 switch (fn) { 3832 case QLA_TGT_CLEAR_ACA: 3833 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, 3834 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); 3835 tmr_func = TMR_CLEAR_ACA; 3836 break; 3837 3838 case QLA_TGT_TARGET_RESET: 3839 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, 3840 "qla_target(%d): TARGET_RESET received\n", 3841 sess->vha->vp_idx); 3842 tmr_func = TMR_TARGET_WARM_RESET; 3843 break; 3844 3845 case QLA_TGT_LUN_RESET: 3846 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, 3847 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); 3848 tmr_func = TMR_LUN_RESET; 3849 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id); 3850 break; 3851 3852 case QLA_TGT_CLEAR_TS: 3853 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, 3854 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); 3855 tmr_func = TMR_CLEAR_TASK_SET; 3856 break; 3857 3858 case QLA_TGT_ABORT_TS: 3859 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, 3860 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); 3861 tmr_func = TMR_ABORT_TASK_SET; 3862 break; 3863 #if 0 3864 case QLA_TGT_ABORT_ALL: 3865 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, 3866 "qla_target(%d): Doing ABORT_ALL_TASKS\n", 3867 sess->vha->vp_idx); 3868 tmr_func = 0; 3869 break; 3870 3871 case QLA_TGT_ABORT_ALL_SESS: 3872 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, 3873 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", 3874 sess->vha->vp_idx); 3875 tmr_func = 0; 3876 break; 3877 3878 case QLA_TGT_NEXUS_LOSS_SESS: 3879 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, 3880 "qla_target(%d): Doing NEXUS_LOSS_SESS\n", 3881 sess->vha->vp_idx); 3882 tmr_func = 0; 3883 break; 3884 3885 case QLA_TGT_NEXUS_LOSS: 3886 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, 3887 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); 3888 tmr_func = 0; 3889 break; 3890 #endif 3891 default: 3892 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, 3893 "qla_target(%d): Unknown task mgmt fn 0x%x\n", 3894 sess->vha->vp_idx, fn); 3895 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3896 return -ENOSYS; 3897 } 3898 3899 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); 3900 if (res != 0) { 3901 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, 3902 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", 3903 sess->vha->vp_idx, res); 3904 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3905 return -EFAULT; 3906 } 3907 3908 return 0; 3909 } 3910 3911 /* ha->hardware_lock supposed to be held on entry */ 3912 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) 3913 { 3914 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3915 struct qla_hw_data *ha = vha->hw; 3916 struct qla_tgt *tgt; 3917 struct qla_tgt_sess *sess; 3918 uint32_t lun, unpacked_lun; 3919 int fn; 3920 3921 tgt = vha->vha_tgt.qla_tgt; 3922 3923 lun = a->u.isp24.fcp_cmnd.lun; 3924 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 3925 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 3926 a->u.isp24.fcp_hdr.s_id); 3927 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 3928 3929 if (!sess) { 3930 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, 3931 "qla_target(%d): task mgmt fn 0x%x for " 3932 "non-existant session\n", vha->vp_idx, fn); 3933 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, 3934 sizeof(struct atio_from_isp)); 3935 } 3936 3937 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) 3938 return -EFAULT; 3939 3940 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 3941 } 3942 3943 /* ha->hardware_lock supposed to be held on entry */ 3944 static int __qlt_abort_task(struct scsi_qla_host *vha, 3945 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) 3946 { 3947 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 3948 struct qla_hw_data *ha = vha->hw; 3949 struct qla_tgt_mgmt_cmd *mcmd; 3950 uint32_t lun, unpacked_lun; 3951 int rc; 3952 3953 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 3954 if (mcmd == NULL) { 3955 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, 3956 "qla_target(%d): %s: Allocation of ABORT cmd failed\n", 3957 vha->vp_idx, __func__); 3958 return -ENOMEM; 3959 } 3960 memset(mcmd, 0, sizeof(*mcmd)); 3961 3962 mcmd->sess = sess; 3963 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 3964 sizeof(mcmd->orig_iocb.imm_ntfy)); 3965 3966 lun = a->u.isp24.fcp_cmnd.lun; 3967 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 3968 mcmd->reset_count = vha->hw->chip_reset; 3969 3970 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, 3971 le16_to_cpu(iocb->u.isp2x.seq_id)); 3972 if (rc != 0) { 3973 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, 3974 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", 3975 vha->vp_idx, rc); 3976 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 3977 return -EFAULT; 3978 } 3979 3980 return 0; 3981 } 3982 3983 /* ha->hardware_lock supposed to be held on entry */ 3984 static int qlt_abort_task(struct scsi_qla_host *vha, 3985 struct imm_ntfy_from_isp *iocb) 3986 { 3987 struct qla_hw_data *ha = vha->hw; 3988 struct qla_tgt_sess *sess; 3989 int loop_id; 3990 3991 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); 3992 3993 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 3994 if (sess == NULL) { 3995 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, 3996 "qla_target(%d): task abort for unexisting " 3997 "session\n", vha->vp_idx); 3998 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt, 3999 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); 4000 } 4001 4002 return __qlt_abort_task(vha, iocb, sess); 4003 } 4004 4005 void qlt_logo_completion_handler(fc_port_t *fcport, int rc) 4006 { 4007 if (fcport->tgt_session) { 4008 if (rc != MBS_COMMAND_COMPLETE) { 4009 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093, 4010 "%s: se_sess %p / sess %p from" 4011 " port %8phC loop_id %#04x s_id %02x:%02x:%02x" 4012 " LOGO failed: %#x\n", 4013 __func__, 4014 fcport->tgt_session->se_sess, 4015 fcport->tgt_session, 4016 fcport->port_name, fcport->loop_id, 4017 fcport->d_id.b.domain, fcport->d_id.b.area, 4018 fcport->d_id.b.al_pa, rc); 4019 } 4020 4021 fcport->tgt_session->logout_completed = 1; 4022 } 4023 } 4024 4025 static void qlt_swap_imm_ntfy_iocb(struct imm_ntfy_from_isp *a, 4026 struct imm_ntfy_from_isp *b) 4027 { 4028 struct imm_ntfy_from_isp tmp; 4029 memcpy(&tmp, a, sizeof(struct imm_ntfy_from_isp)); 4030 memcpy(a, b, sizeof(struct imm_ntfy_from_isp)); 4031 memcpy(b, &tmp, sizeof(struct imm_ntfy_from_isp)); 4032 } 4033 4034 /* 4035 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) 4036 * 4037 * Schedules sessions with matching port_id/loop_id but different wwn for 4038 * deletion. Returns existing session with matching wwn if present. 4039 * Null otherwise. 4040 */ 4041 static struct qla_tgt_sess * 4042 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn, 4043 port_id_t port_id, uint16_t loop_id) 4044 { 4045 struct qla_tgt_sess *sess = NULL, *other_sess; 4046 uint64_t other_wwn; 4047 4048 list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) { 4049 4050 other_wwn = wwn_to_u64(other_sess->port_name); 4051 4052 if (wwn == other_wwn) { 4053 WARN_ON(sess); 4054 sess = other_sess; 4055 continue; 4056 } 4057 4058 /* find other sess with nport_id collision */ 4059 if (port_id.b24 == other_sess->s_id.b24) { 4060 if (loop_id != other_sess->loop_id) { 4061 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c, 4062 "Invalidating sess %p loop_id %d wwn %llx.\n", 4063 other_sess, other_sess->loop_id, other_wwn); 4064 4065 /* 4066 * logout_on_delete is set by default, but another 4067 * session that has the same s_id/loop_id combo 4068 * might have cleared it when requested this session 4069 * deletion, so don't touch it 4070 */ 4071 qlt_schedule_sess_for_deletion(other_sess, true); 4072 } else { 4073 /* 4074 * Another wwn used to have our s_id/loop_id 4075 * combo - kill the session, but don't log out 4076 */ 4077 sess->logout_on_delete = 0; 4078 qlt_schedule_sess_for_deletion(other_sess, 4079 true); 4080 } 4081 continue; 4082 } 4083 4084 /* find other sess with nport handle collision */ 4085 if (loop_id == other_sess->loop_id) { 4086 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d, 4087 "Invalidating sess %p loop_id %d wwn %llx.\n", 4088 other_sess, other_sess->loop_id, other_wwn); 4089 4090 /* Same loop_id but different s_id 4091 * Ok to kill and logout */ 4092 qlt_schedule_sess_for_deletion(other_sess, true); 4093 } 4094 } 4095 4096 return sess; 4097 } 4098 4099 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */ 4100 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id) 4101 { 4102 struct qla_tgt_sess_op *op; 4103 struct qla_tgt_cmd *cmd; 4104 uint32_t key; 4105 int count = 0; 4106 4107 key = (((u32)s_id->b.domain << 16) | 4108 ((u32)s_id->b.area << 8) | 4109 ((u32)s_id->b.al_pa)); 4110 4111 spin_lock(&vha->cmd_list_lock); 4112 list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) { 4113 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id); 4114 if (op_key == key) { 4115 op->aborted = true; 4116 count++; 4117 } 4118 } 4119 list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) { 4120 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id); 4121 if (cmd_key == key) { 4122 cmd->state = QLA_TGT_STATE_ABORTED; 4123 count++; 4124 } 4125 } 4126 spin_unlock(&vha->cmd_list_lock); 4127 4128 return count; 4129 } 4130 4131 /* 4132 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4133 */ 4134 static int qlt_24xx_handle_els(struct scsi_qla_host *vha, 4135 struct imm_ntfy_from_isp *iocb) 4136 { 4137 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4138 struct qla_hw_data *ha = vha->hw; 4139 struct qla_tgt_sess *sess = NULL; 4140 uint64_t wwn; 4141 port_id_t port_id; 4142 uint16_t loop_id; 4143 uint16_t wd3_lo; 4144 int res = 0; 4145 4146 wwn = wwn_to_u64(iocb->u.isp24.port_name); 4147 4148 port_id.b.domain = iocb->u.isp24.port_id[2]; 4149 port_id.b.area = iocb->u.isp24.port_id[1]; 4150 port_id.b.al_pa = iocb->u.isp24.port_id[0]; 4151 port_id.b.rsvd_1 = 0; 4152 4153 loop_id = le16_to_cpu(iocb->u.isp24.nport_handle); 4154 4155 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, 4156 "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n", 4157 vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode); 4158 4159 /* res = 1 means ack at the end of thread 4160 * res = 0 means ack async/later. 4161 */ 4162 switch (iocb->u.isp24.status_subcode) { 4163 case ELS_PLOGI: 4164 4165 /* Mark all stale commands in qla_tgt_wq for deletion */ 4166 abort_cmds_for_s_id(vha, &port_id); 4167 4168 if (wwn) 4169 sess = qlt_find_sess_invalidate_other(tgt, wwn, 4170 port_id, loop_id); 4171 4172 if (!sess || IS_SW_RESV_ADDR(sess->s_id)) { 4173 res = 1; 4174 break; 4175 } 4176 4177 if (sess->plogi_ack_needed) { 4178 /* 4179 * Initiator sent another PLOGI before last PLOGI could 4180 * finish. Swap plogi iocbs and terminate old one 4181 * without acking, new one will get acked when session 4182 * deletion completes. 4183 */ 4184 ql_log(ql_log_warn, sess->vha, 0xf094, 4185 "sess %p received double plogi.\n", sess); 4186 4187 qlt_swap_imm_ntfy_iocb(iocb, &sess->tm_iocb); 4188 4189 qlt_send_term_imm_notif(vha, iocb, 1); 4190 4191 res = 0; 4192 break; 4193 } 4194 4195 res = 0; 4196 4197 /* 4198 * Save immediate Notif IOCB for Ack when sess is done 4199 * and being deleted. 4200 */ 4201 memcpy(&sess->tm_iocb, iocb, sizeof(sess->tm_iocb)); 4202 sess->plogi_ack_needed = 1; 4203 4204 /* 4205 * Under normal circumstances we want to release nport handle 4206 * during LOGO process to avoid nport handle leaks inside FW. 4207 * The exception is when LOGO is done while another PLOGI with 4208 * the same nport handle is waiting as might be the case here. 4209 * Note: there is always a possibily of a race where session 4210 * deletion has already started for other reasons (e.g. ACL 4211 * removal) and now PLOGI arrives: 4212 * 1. if PLOGI arrived in FW after nport handle has been freed, 4213 * FW must have assigned this PLOGI a new/same handle and we 4214 * can proceed ACK'ing it as usual when session deletion 4215 * completes. 4216 * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT 4217 * bit reached it, the handle has now been released. We'll 4218 * get an error when we ACK this PLOGI. Nothing will be sent 4219 * back to initiator. Initiator should eventually retry 4220 * PLOGI and situation will correct itself. 4221 */ 4222 sess->keep_nport_handle = ((sess->loop_id == loop_id) && 4223 (sess->s_id.b24 == port_id.b24)); 4224 qlt_schedule_sess_for_deletion(sess, true); 4225 break; 4226 4227 case ELS_PRLI: 4228 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo); 4229 4230 if (wwn) 4231 sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id, 4232 loop_id); 4233 4234 if (sess != NULL) { 4235 if (sess->deleted) { 4236 /* 4237 * Impatient initiator sent PRLI before last 4238 * PLOGI could finish. Will force him to re-try, 4239 * while last one finishes. 4240 */ 4241 ql_log(ql_log_warn, sess->vha, 0xf095, 4242 "sess %p PRLI received, before plogi ack.\n", 4243 sess); 4244 qlt_send_term_imm_notif(vha, iocb, 1); 4245 res = 0; 4246 break; 4247 } 4248 4249 /* 4250 * This shouldn't happen under normal circumstances, 4251 * since we have deleted the old session during PLOGI 4252 */ 4253 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096, 4254 "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n", 4255 sess->loop_id, sess, iocb->u.isp24.nport_handle); 4256 4257 sess->local = 0; 4258 sess->loop_id = loop_id; 4259 sess->s_id = port_id; 4260 4261 if (wd3_lo & BIT_7) 4262 sess->conf_compl_supported = 1; 4263 4264 } 4265 res = 1; /* send notify ack */ 4266 4267 /* Make session global (not used in fabric mode) */ 4268 if (ha->current_topology != ISP_CFG_F) { 4269 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); 4270 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags); 4271 qla2xxx_wake_dpc(vha); 4272 } else { 4273 /* todo: else - create sess here. */ 4274 res = 1; /* send notify ack */ 4275 } 4276 4277 break; 4278 4279 case ELS_LOGO: 4280 case ELS_PRLO: 4281 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 4282 break; 4283 case ELS_PDISC: 4284 case ELS_ADISC: 4285 { 4286 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4287 if (tgt->link_reinit_iocb_pending) { 4288 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 4289 0, 0, 0, 0, 0, 0); 4290 tgt->link_reinit_iocb_pending = 0; 4291 } 4292 res = 1; /* send notify ack */ 4293 break; 4294 } 4295 4296 case ELS_FLOGI: /* should never happen */ 4297 default: 4298 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, 4299 "qla_target(%d): Unsupported ELS command %x " 4300 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); 4301 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 4302 break; 4303 } 4304 4305 return res; 4306 } 4307 4308 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) 4309 { 4310 #if 1 4311 /* 4312 * FIXME: Reject non zero SRR relative offset until we can test 4313 * this code properly. 4314 */ 4315 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); 4316 return -1; 4317 #else 4318 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; 4319 size_t first_offset = 0, rem_offset = offset, tmp = 0; 4320 int i, sg_srr_cnt, bufflen = 0; 4321 4322 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, 4323 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " 4324 "cmd->sg_cnt: %u, direction: %d\n", 4325 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 4326 4327 if (!cmd->sg || !cmd->sg_cnt) { 4328 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, 4329 "Missing cmd->sg or zero cmd->sg_cnt in" 4330 " qla_tgt_set_data_offset\n"); 4331 return -EINVAL; 4332 } 4333 /* 4334 * Walk the current cmd->sg list until we locate the new sg_srr_start 4335 */ 4336 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { 4337 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, 4338 "sg[%d]: %p page: %p, length: %d, offset: %d\n", 4339 i, sg, sg_page(sg), sg->length, sg->offset); 4340 4341 if ((sg->length + tmp) > offset) { 4342 first_offset = rem_offset; 4343 sg_srr_start = sg; 4344 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, 4345 "Found matching sg[%d], using %p as sg_srr_start, " 4346 "and using first_offset: %zu\n", i, sg, 4347 first_offset); 4348 break; 4349 } 4350 tmp += sg->length; 4351 rem_offset -= sg->length; 4352 } 4353 4354 if (!sg_srr_start) { 4355 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, 4356 "Unable to locate sg_srr_start for offset: %u\n", offset); 4357 return -EINVAL; 4358 } 4359 sg_srr_cnt = (cmd->sg_cnt - i); 4360 4361 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); 4362 if (!sg_srr) { 4363 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, 4364 "Unable to allocate sgp\n"); 4365 return -ENOMEM; 4366 } 4367 sg_init_table(sg_srr, sg_srr_cnt); 4368 sgp = &sg_srr[0]; 4369 /* 4370 * Walk the remaining list for sg_srr_start, mapping to the newly 4371 * allocated sg_srr taking first_offset into account. 4372 */ 4373 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { 4374 if (first_offset) { 4375 sg_set_page(sgp, sg_page(sg), 4376 (sg->length - first_offset), first_offset); 4377 first_offset = 0; 4378 } else { 4379 sg_set_page(sgp, sg_page(sg), sg->length, 0); 4380 } 4381 bufflen += sgp->length; 4382 4383 sgp = sg_next(sgp); 4384 if (!sgp) 4385 break; 4386 } 4387 4388 cmd->sg = sg_srr; 4389 cmd->sg_cnt = sg_srr_cnt; 4390 cmd->bufflen = bufflen; 4391 cmd->offset += offset; 4392 cmd->free_sg = 1; 4393 4394 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); 4395 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", 4396 cmd->sg_cnt); 4397 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", 4398 cmd->bufflen); 4399 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", 4400 cmd->offset); 4401 4402 if (cmd->sg_cnt < 0) 4403 BUG(); 4404 4405 if (cmd->bufflen < 0) 4406 BUG(); 4407 4408 return 0; 4409 #endif 4410 } 4411 4412 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd, 4413 uint32_t srr_rel_offs, int *xmit_type) 4414 { 4415 int res = 0, rel_offs; 4416 4417 rel_offs = srr_rel_offs - cmd->offset; 4418 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d", 4419 srr_rel_offs, rel_offs); 4420 4421 *xmit_type = QLA_TGT_XMIT_ALL; 4422 4423 if (rel_offs < 0) { 4424 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062, 4425 "qla_target(%d): SRR rel_offs (%d) < 0", 4426 cmd->vha->vp_idx, rel_offs); 4427 res = -1; 4428 } else if (rel_offs == cmd->bufflen) 4429 *xmit_type = QLA_TGT_XMIT_STATUS; 4430 else if (rel_offs > 0) 4431 res = qlt_set_data_offset(cmd, rel_offs); 4432 4433 return res; 4434 } 4435 4436 /* No locks, thread context */ 4437 static void qlt_handle_srr(struct scsi_qla_host *vha, 4438 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm) 4439 { 4440 struct imm_ntfy_from_isp *ntfy = 4441 (struct imm_ntfy_from_isp *)&imm->imm_ntfy; 4442 struct qla_hw_data *ha = vha->hw; 4443 struct qla_tgt_cmd *cmd = sctio->cmd; 4444 struct se_cmd *se_cmd = &cmd->se_cmd; 4445 unsigned long flags; 4446 int xmit_type = 0, resp = 0; 4447 uint32_t offset; 4448 uint16_t srr_ui; 4449 4450 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); 4451 srr_ui = ntfy->u.isp24.srr_ui; 4452 4453 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n", 4454 cmd, srr_ui); 4455 4456 switch (srr_ui) { 4457 case SRR_IU_STATUS: 4458 spin_lock_irqsave(&ha->hardware_lock, flags); 4459 qlt_send_notify_ack(vha, ntfy, 4460 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4461 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4462 xmit_type = QLA_TGT_XMIT_STATUS; 4463 resp = 1; 4464 break; 4465 case SRR_IU_DATA_IN: 4466 if (!cmd->sg || !cmd->sg_cnt) { 4467 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063, 4468 "Unable to process SRR_IU_DATA_IN due to" 4469 " missing cmd->sg, state: %d\n", cmd->state); 4470 dump_stack(); 4471 goto out_reject; 4472 } 4473 if (se_cmd->scsi_status != 0) { 4474 ql_dbg(ql_dbg_tgt, vha, 0xe02a, 4475 "Rejecting SRR_IU_DATA_IN with non GOOD " 4476 "scsi_status\n"); 4477 goto out_reject; 4478 } 4479 cmd->bufflen = se_cmd->data_length; 4480 4481 if (qlt_has_data(cmd)) { 4482 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 4483 goto out_reject; 4484 spin_lock_irqsave(&ha->hardware_lock, flags); 4485 qlt_send_notify_ack(vha, ntfy, 4486 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4487 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4488 resp = 1; 4489 } else { 4490 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064, 4491 "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject", 4492 vha->vp_idx, se_cmd->tag, 4493 cmd->se_cmd.scsi_status); 4494 goto out_reject; 4495 } 4496 break; 4497 case SRR_IU_DATA_OUT: 4498 if (!cmd->sg || !cmd->sg_cnt) { 4499 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, 4500 "Unable to process SRR_IU_DATA_OUT due to" 4501 " missing cmd->sg\n"); 4502 dump_stack(); 4503 goto out_reject; 4504 } 4505 if (se_cmd->scsi_status != 0) { 4506 ql_dbg(ql_dbg_tgt, vha, 0xe02b, 4507 "Rejecting SRR_IU_DATA_OUT" 4508 " with non GOOD scsi_status\n"); 4509 goto out_reject; 4510 } 4511 cmd->bufflen = se_cmd->data_length; 4512 4513 if (qlt_has_data(cmd)) { 4514 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 4515 goto out_reject; 4516 spin_lock_irqsave(&ha->hardware_lock, flags); 4517 qlt_send_notify_ack(vha, ntfy, 4518 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 4519 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4520 if (xmit_type & QLA_TGT_XMIT_DATA) { 4521 cmd->cmd_flags |= BIT_8; 4522 qlt_rdy_to_xfer(cmd); 4523 } 4524 } else { 4525 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, 4526 "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject", 4527 vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status); 4528 goto out_reject; 4529 } 4530 break; 4531 default: 4532 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, 4533 "qla_target(%d): Unknown srr_ui value %x", 4534 vha->vp_idx, srr_ui); 4535 goto out_reject; 4536 } 4537 4538 /* Transmit response in case of status and data-in cases */ 4539 if (resp) { 4540 cmd->cmd_flags |= BIT_7; 4541 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 4542 } 4543 4544 return; 4545 4546 out_reject: 4547 spin_lock_irqsave(&ha->hardware_lock, flags); 4548 qlt_send_notify_ack(vha, ntfy, 0, 0, 0, 4549 NOTIFY_ACK_SRR_FLAGS_REJECT, 4550 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4551 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4552 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 4553 cmd->state = QLA_TGT_STATE_DATA_IN; 4554 dump_stack(); 4555 } else { 4556 cmd->cmd_flags |= BIT_9; 4557 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 4558 } 4559 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4560 } 4561 4562 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, 4563 struct qla_tgt_srr_imm *imm, int ha_locked) 4564 { 4565 struct qla_hw_data *ha = vha->hw; 4566 unsigned long flags = 0; 4567 4568 #ifndef __CHECKER__ 4569 if (!ha_locked) 4570 spin_lock_irqsave(&ha->hardware_lock, flags); 4571 #endif 4572 4573 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, 4574 NOTIFY_ACK_SRR_FLAGS_REJECT, 4575 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4576 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4577 4578 #ifndef __CHECKER__ 4579 if (!ha_locked) 4580 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4581 #endif 4582 4583 kfree(imm); 4584 } 4585 4586 static void qlt_handle_srr_work(struct work_struct *work) 4587 { 4588 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); 4589 struct scsi_qla_host *vha = tgt->vha; 4590 struct qla_tgt_srr_ctio *sctio; 4591 unsigned long flags; 4592 4593 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", 4594 tgt); 4595 4596 restart: 4597 spin_lock_irqsave(&tgt->srr_lock, flags); 4598 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { 4599 struct qla_tgt_srr_imm *imm, *i, *ti; 4600 struct qla_tgt_cmd *cmd; 4601 struct se_cmd *se_cmd; 4602 4603 imm = NULL; 4604 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, 4605 srr_list_entry) { 4606 if (i->srr_id == sctio->srr_id) { 4607 list_del(&i->srr_list_entry); 4608 if (imm) { 4609 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, 4610 "qla_target(%d): There must be " 4611 "only one IMM SRR per CTIO SRR " 4612 "(IMM SRR %p, id %d, CTIO %p\n", 4613 vha->vp_idx, i, i->srr_id, sctio); 4614 qlt_reject_free_srr_imm(tgt->vha, i, 0); 4615 } else 4616 imm = i; 4617 } 4618 } 4619 4620 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, 4621 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, 4622 sctio->srr_id); 4623 4624 if (imm == NULL) { 4625 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, 4626 "Not found matching IMM for SRR CTIO (id %d)\n", 4627 sctio->srr_id); 4628 continue; 4629 } else 4630 list_del(&sctio->srr_list_entry); 4631 4632 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4633 4634 cmd = sctio->cmd; 4635 /* 4636 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow 4637 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() 4638 * logic.. 4639 */ 4640 cmd->offset = 0; 4641 if (cmd->free_sg) { 4642 kfree(cmd->sg); 4643 cmd->sg = NULL; 4644 cmd->free_sg = 0; 4645 } 4646 se_cmd = &cmd->se_cmd; 4647 4648 cmd->sg_cnt = se_cmd->t_data_nents; 4649 cmd->sg = se_cmd->t_data_sg; 4650 4651 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, 4652 "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d", 4653 cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ? 4654 se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset); 4655 4656 qlt_handle_srr(vha, sctio, imm); 4657 4658 kfree(imm); 4659 kfree(sctio); 4660 goto restart; 4661 } 4662 spin_unlock_irqrestore(&tgt->srr_lock, flags); 4663 } 4664 4665 /* ha->hardware_lock supposed to be held on entry */ 4666 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, 4667 struct imm_ntfy_from_isp *iocb) 4668 { 4669 struct qla_tgt_srr_imm *imm; 4670 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4671 struct qla_tgt_srr_ctio *sctio; 4672 4673 tgt->imm_srr_id++; 4674 4675 ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n", 4676 vha->vp_idx); 4677 4678 imm = kzalloc(sizeof(*imm), GFP_ATOMIC); 4679 if (imm != NULL) { 4680 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); 4681 4682 /* IRQ is already OFF */ 4683 spin_lock(&tgt->srr_lock); 4684 imm->srr_id = tgt->imm_srr_id; 4685 list_add_tail(&imm->srr_list_entry, 4686 &tgt->srr_imm_list); 4687 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, 4688 "IMM NTFY SRR %p added (id %d, ui %x)\n", 4689 imm, imm->srr_id, iocb->u.isp24.srr_ui); 4690 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 4691 int found = 0; 4692 list_for_each_entry(sctio, &tgt->srr_ctio_list, 4693 srr_list_entry) { 4694 if (sctio->srr_id == imm->srr_id) { 4695 found = 1; 4696 break; 4697 } 4698 } 4699 if (found) { 4700 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", 4701 "Scheduling srr work\n"); 4702 schedule_work(&tgt->srr_work); 4703 } else { 4704 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, 4705 "qla_target(%d): imm_srr_id " 4706 "== ctio_srr_id (%d), but there is no " 4707 "corresponding SRR CTIO, deleting IMM " 4708 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, 4709 imm); 4710 list_del(&imm->srr_list_entry); 4711 4712 kfree(imm); 4713 4714 spin_unlock(&tgt->srr_lock); 4715 goto out_reject; 4716 } 4717 } 4718 spin_unlock(&tgt->srr_lock); 4719 } else { 4720 struct qla_tgt_srr_ctio *ts; 4721 4722 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, 4723 "qla_target(%d): Unable to allocate SRR IMM " 4724 "entry, SRR request will be rejected\n", vha->vp_idx); 4725 4726 /* IRQ is already OFF */ 4727 spin_lock(&tgt->srr_lock); 4728 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, 4729 srr_list_entry) { 4730 if (sctio->srr_id == tgt->imm_srr_id) { 4731 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, 4732 "CTIO SRR %p deleted (id %d)\n", 4733 sctio, sctio->srr_id); 4734 list_del(&sctio->srr_list_entry); 4735 qlt_send_term_exchange(vha, sctio->cmd, 4736 &sctio->cmd->atio, 1); 4737 kfree(sctio); 4738 } 4739 } 4740 spin_unlock(&tgt->srr_lock); 4741 goto out_reject; 4742 } 4743 4744 return; 4745 4746 out_reject: 4747 qlt_send_notify_ack(vha, iocb, 0, 0, 0, 4748 NOTIFY_ACK_SRR_FLAGS_REJECT, 4749 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 4750 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 4751 } 4752 4753 /* 4754 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4755 */ 4756 static void qlt_handle_imm_notify(struct scsi_qla_host *vha, 4757 struct imm_ntfy_from_isp *iocb) 4758 { 4759 struct qla_hw_data *ha = vha->hw; 4760 uint32_t add_flags = 0; 4761 int send_notify_ack = 1; 4762 uint16_t status; 4763 4764 status = le16_to_cpu(iocb->u.isp2x.status); 4765 switch (status) { 4766 case IMM_NTFY_LIP_RESET: 4767 { 4768 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, 4769 "qla_target(%d): LIP reset (loop %#x), subcode %x\n", 4770 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), 4771 iocb->u.isp24.status_subcode); 4772 4773 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 4774 send_notify_ack = 0; 4775 break; 4776 } 4777 4778 case IMM_NTFY_LIP_LINK_REINIT: 4779 { 4780 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4781 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, 4782 "qla_target(%d): LINK REINIT (loop %#x, " 4783 "subcode %x)\n", vha->vp_idx, 4784 le16_to_cpu(iocb->u.isp24.nport_handle), 4785 iocb->u.isp24.status_subcode); 4786 if (tgt->link_reinit_iocb_pending) { 4787 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 4788 0, 0, 0, 0, 0, 0); 4789 } 4790 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); 4791 tgt->link_reinit_iocb_pending = 1; 4792 /* 4793 * QLogic requires to wait after LINK REINIT for possible 4794 * PDISC or ADISC ELS commands 4795 */ 4796 send_notify_ack = 0; 4797 break; 4798 } 4799 4800 case IMM_NTFY_PORT_LOGOUT: 4801 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, 4802 "qla_target(%d): Port logout (loop " 4803 "%#x, subcode %x)\n", vha->vp_idx, 4804 le16_to_cpu(iocb->u.isp24.nport_handle), 4805 iocb->u.isp24.status_subcode); 4806 4807 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) 4808 send_notify_ack = 0; 4809 /* The sessions will be cleared in the callback, if needed */ 4810 break; 4811 4812 case IMM_NTFY_GLBL_TPRLO: 4813 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, 4814 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); 4815 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 4816 send_notify_ack = 0; 4817 /* The sessions will be cleared in the callback, if needed */ 4818 break; 4819 4820 case IMM_NTFY_PORT_CONFIG: 4821 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, 4822 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, 4823 status); 4824 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 4825 send_notify_ack = 0; 4826 /* The sessions will be cleared in the callback, if needed */ 4827 break; 4828 4829 case IMM_NTFY_GLBL_LOGO: 4830 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, 4831 "qla_target(%d): Link failure detected\n", 4832 vha->vp_idx); 4833 /* I_T nexus loss */ 4834 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 4835 send_notify_ack = 0; 4836 break; 4837 4838 case IMM_NTFY_IOCB_OVERFLOW: 4839 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, 4840 "qla_target(%d): Cannot provide requested " 4841 "capability (IOCB overflowed the immediate notify " 4842 "resource count)\n", vha->vp_idx); 4843 break; 4844 4845 case IMM_NTFY_ABORT_TASK: 4846 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, 4847 "qla_target(%d): Abort Task (S %08x I %#x -> " 4848 "L %#x)\n", vha->vp_idx, 4849 le16_to_cpu(iocb->u.isp2x.seq_id), 4850 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), 4851 le16_to_cpu(iocb->u.isp2x.lun)); 4852 if (qlt_abort_task(vha, iocb) == 0) 4853 send_notify_ack = 0; 4854 break; 4855 4856 case IMM_NTFY_RESOURCE: 4857 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, 4858 "qla_target(%d): Out of resources, host %ld\n", 4859 vha->vp_idx, vha->host_no); 4860 break; 4861 4862 case IMM_NTFY_MSG_RX: 4863 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, 4864 "qla_target(%d): Immediate notify task %x\n", 4865 vha->vp_idx, iocb->u.isp2x.task_flags); 4866 if (qlt_handle_task_mgmt(vha, iocb) == 0) 4867 send_notify_ack = 0; 4868 break; 4869 4870 case IMM_NTFY_ELS: 4871 if (qlt_24xx_handle_els(vha, iocb) == 0) 4872 send_notify_ack = 0; 4873 break; 4874 4875 case IMM_NTFY_SRR: 4876 qlt_prepare_srr_imm(vha, iocb); 4877 send_notify_ack = 0; 4878 break; 4879 4880 default: 4881 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, 4882 "qla_target(%d): Received unknown immediate " 4883 "notify status %x\n", vha->vp_idx, status); 4884 break; 4885 } 4886 4887 if (send_notify_ack) 4888 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); 4889 } 4890 4891 /* 4892 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 4893 * This function sends busy to ISP 2xxx or 24xx. 4894 */ 4895 static int __qlt_send_busy(struct scsi_qla_host *vha, 4896 struct atio_from_isp *atio, uint16_t status) 4897 { 4898 struct ctio7_to_24xx *ctio24; 4899 struct qla_hw_data *ha = vha->hw; 4900 request_t *pkt; 4901 struct qla_tgt_sess *sess = NULL; 4902 4903 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 4904 atio->u.isp24.fcp_hdr.s_id); 4905 if (!sess) { 4906 qlt_send_term_exchange(vha, NULL, atio, 1); 4907 return 0; 4908 } 4909 /* Sending marker isn't necessary, since we called from ISR */ 4910 4911 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 4912 if (!pkt) { 4913 ql_dbg(ql_dbg_io, vha, 0x3063, 4914 "qla_target(%d): %s failed: unable to allocate " 4915 "request packet", vha->vp_idx, __func__); 4916 return -ENOMEM; 4917 } 4918 4919 pkt->entry_count = 1; 4920 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 4921 4922 ctio24 = (struct ctio7_to_24xx *)pkt; 4923 ctio24->entry_type = CTIO_TYPE7; 4924 ctio24->nport_handle = sess->loop_id; 4925 ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT); 4926 ctio24->vp_index = vha->vp_idx; 4927 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 4928 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 4929 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 4930 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 4931 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 4932 cpu_to_le16( 4933 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | 4934 CTIO7_FLAGS_DONT_RET_CTIO); 4935 /* 4936 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, 4937 * if the explicit conformation is used. 4938 */ 4939 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 4940 ctio24->u.status1.scsi_status = cpu_to_le16(status); 4941 /* Memory Barrier */ 4942 wmb(); 4943 qla2x00_start_iocbs(vha, vha->req); 4944 return 0; 4945 } 4946 4947 /* 4948 * This routine is used to allocate a command for either a QFull condition 4949 * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go 4950 * out previously. 4951 */ 4952 static void 4953 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha, 4954 struct atio_from_isp *atio, uint16_t status, int qfull) 4955 { 4956 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 4957 struct qla_hw_data *ha = vha->hw; 4958 struct qla_tgt_sess *sess; 4959 struct se_session *se_sess; 4960 struct qla_tgt_cmd *cmd; 4961 int tag; 4962 4963 if (unlikely(tgt->tgt_stop)) { 4964 ql_dbg(ql_dbg_io, vha, 0x300a, 4965 "New command while device %p is shutting down\n", tgt); 4966 return; 4967 } 4968 4969 if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) { 4970 vha->hw->tgt.num_qfull_cmds_dropped++; 4971 if (vha->hw->tgt.num_qfull_cmds_dropped > 4972 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 4973 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 4974 vha->hw->tgt.num_qfull_cmds_dropped; 4975 4976 ql_dbg(ql_dbg_io, vha, 0x3068, 4977 "qla_target(%d): %s: QFull CMD dropped[%d]\n", 4978 vha->vp_idx, __func__, 4979 vha->hw->tgt.num_qfull_cmds_dropped); 4980 4981 qlt_chk_exch_leak_thresh_hold(vha); 4982 return; 4983 } 4984 4985 sess = ha->tgt.tgt_ops->find_sess_by_s_id 4986 (vha, atio->u.isp24.fcp_hdr.s_id); 4987 if (!sess) 4988 return; 4989 4990 se_sess = sess->se_sess; 4991 4992 tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); 4993 if (tag < 0) 4994 return; 4995 4996 cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag]; 4997 if (!cmd) { 4998 ql_dbg(ql_dbg_io, vha, 0x3009, 4999 "qla_target(%d): %s: Allocation of cmd failed\n", 5000 vha->vp_idx, __func__); 5001 5002 vha->hw->tgt.num_qfull_cmds_dropped++; 5003 if (vha->hw->tgt.num_qfull_cmds_dropped > 5004 vha->hw->qla_stats.stat_max_qfull_cmds_dropped) 5005 vha->hw->qla_stats.stat_max_qfull_cmds_dropped = 5006 vha->hw->tgt.num_qfull_cmds_dropped; 5007 5008 qlt_chk_exch_leak_thresh_hold(vha); 5009 return; 5010 } 5011 5012 memset(cmd, 0, sizeof(struct qla_tgt_cmd)); 5013 5014 qlt_incr_num_pend_cmds(vha); 5015 INIT_LIST_HEAD(&cmd->cmd_list); 5016 memcpy(&cmd->atio, atio, sizeof(*atio)); 5017 5018 cmd->tgt = vha->vha_tgt.qla_tgt; 5019 cmd->vha = vha; 5020 cmd->reset_count = vha->hw->chip_reset; 5021 cmd->q_full = 1; 5022 5023 if (qfull) { 5024 cmd->q_full = 1; 5025 /* NOTE: borrowing the state field to carry the status */ 5026 cmd->state = status; 5027 } else 5028 cmd->term_exchg = 1; 5029 5030 list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list); 5031 5032 vha->hw->tgt.num_qfull_cmds_alloc++; 5033 if (vha->hw->tgt.num_qfull_cmds_alloc > 5034 vha->hw->qla_stats.stat_max_qfull_cmds_alloc) 5035 vha->hw->qla_stats.stat_max_qfull_cmds_alloc = 5036 vha->hw->tgt.num_qfull_cmds_alloc; 5037 } 5038 5039 int 5040 qlt_free_qfull_cmds(struct scsi_qla_host *vha) 5041 { 5042 struct qla_hw_data *ha = vha->hw; 5043 unsigned long flags; 5044 struct qla_tgt_cmd *cmd, *tcmd; 5045 struct list_head free_list; 5046 int rc = 0; 5047 5048 if (list_empty(&ha->tgt.q_full_list)) 5049 return 0; 5050 5051 INIT_LIST_HEAD(&free_list); 5052 5053 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 5054 5055 if (list_empty(&ha->tgt.q_full_list)) { 5056 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 5057 return 0; 5058 } 5059 5060 list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) { 5061 if (cmd->q_full) 5062 /* cmd->state is a borrowed field to hold status */ 5063 rc = __qlt_send_busy(vha, &cmd->atio, cmd->state); 5064 else if (cmd->term_exchg) 5065 rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio); 5066 5067 if (rc == -ENOMEM) 5068 break; 5069 5070 if (cmd->q_full) 5071 ql_dbg(ql_dbg_io, vha, 0x3006, 5072 "%s: busy sent for ox_id[%04x]\n", __func__, 5073 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 5074 else if (cmd->term_exchg) 5075 ql_dbg(ql_dbg_io, vha, 0x3007, 5076 "%s: Term exchg sent for ox_id[%04x]\n", __func__, 5077 be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id)); 5078 else 5079 ql_dbg(ql_dbg_io, vha, 0x3008, 5080 "%s: Unexpected cmd in QFull list %p\n", __func__, 5081 cmd); 5082 5083 list_del(&cmd->cmd_list); 5084 list_add_tail(&cmd->cmd_list, &free_list); 5085 5086 /* piggy back on hardware_lock for protection */ 5087 vha->hw->tgt.num_qfull_cmds_alloc--; 5088 } 5089 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 5090 5091 cmd = NULL; 5092 5093 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) { 5094 list_del(&cmd->cmd_list); 5095 /* This cmd was never sent to TCM. There is no need 5096 * to schedule free or call free_cmd 5097 */ 5098 qlt_free_cmd(cmd); 5099 } 5100 return rc; 5101 } 5102 5103 static void 5104 qlt_send_busy(struct scsi_qla_host *vha, 5105 struct atio_from_isp *atio, uint16_t status) 5106 { 5107 int rc = 0; 5108 5109 rc = __qlt_send_busy(vha, atio, status); 5110 if (rc == -ENOMEM) 5111 qlt_alloc_qfull_cmd(vha, atio, status, 1); 5112 } 5113 5114 static int 5115 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, 5116 struct atio_from_isp *atio) 5117 { 5118 struct qla_hw_data *ha = vha->hw; 5119 uint16_t status; 5120 5121 if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha)) 5122 return 0; 5123 5124 status = temp_sam_status; 5125 qlt_send_busy(vha, atio, status); 5126 return 1; 5127 } 5128 5129 /* ha->hardware_lock supposed to be held on entry */ 5130 /* called via callback from qla2xxx */ 5131 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, 5132 struct atio_from_isp *atio) 5133 { 5134 struct qla_hw_data *ha = vha->hw; 5135 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5136 int rc; 5137 5138 if (unlikely(tgt == NULL)) { 5139 ql_dbg(ql_dbg_io, vha, 0x3064, 5140 "ATIO pkt, but no tgt (ha %p)", ha); 5141 return; 5142 } 5143 /* 5144 * In tgt_stop mode we also should allow all requests to pass. 5145 * Otherwise, some commands can stuck. 5146 */ 5147 5148 tgt->irq_cmd_count++; 5149 5150 switch (atio->u.raw.entry_type) { 5151 case ATIO_TYPE7: 5152 if (unlikely(atio->u.isp24.exchange_addr == 5153 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { 5154 ql_dbg(ql_dbg_io, vha, 0x3065, 5155 "qla_target(%d): ATIO_TYPE7 " 5156 "received with UNKNOWN exchange address, " 5157 "sending QUEUE_FULL\n", vha->vp_idx); 5158 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); 5159 break; 5160 } 5161 5162 5163 5164 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) { 5165 rc = qlt_chk_qfull_thresh_hold(vha, atio); 5166 if (rc != 0) { 5167 tgt->irq_cmd_count--; 5168 return; 5169 } 5170 rc = qlt_handle_cmd_for_atio(vha, atio); 5171 } else { 5172 rc = qlt_handle_task_mgmt(vha, atio); 5173 } 5174 if (unlikely(rc != 0)) { 5175 if (rc == -ESRCH) { 5176 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 5177 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 5178 #else 5179 qlt_send_term_exchange(vha, NULL, atio, 1); 5180 #endif 5181 } else { 5182 if (tgt->tgt_stop) { 5183 ql_dbg(ql_dbg_tgt, vha, 0xe059, 5184 "qla_target: Unable to send " 5185 "command to target for req, " 5186 "ignoring.\n"); 5187 } else { 5188 ql_dbg(ql_dbg_tgt, vha, 0xe05a, 5189 "qla_target(%d): Unable to send " 5190 "command to target, sending BUSY " 5191 "status.\n", vha->vp_idx); 5192 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 5193 } 5194 } 5195 } 5196 break; 5197 5198 case IMMED_NOTIFY_TYPE: 5199 { 5200 if (unlikely(atio->u.isp2x.entry_status != 0)) { 5201 ql_dbg(ql_dbg_tgt, vha, 0xe05b, 5202 "qla_target(%d): Received ATIO packet %x " 5203 "with error status %x\n", vha->vp_idx, 5204 atio->u.raw.entry_type, 5205 atio->u.isp2x.entry_status); 5206 break; 5207 } 5208 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); 5209 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); 5210 break; 5211 } 5212 5213 default: 5214 ql_dbg(ql_dbg_tgt, vha, 0xe05c, 5215 "qla_target(%d): Received unknown ATIO atio " 5216 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 5217 break; 5218 } 5219 5220 tgt->irq_cmd_count--; 5221 } 5222 5223 /* ha->hardware_lock supposed to be held on entry */ 5224 /* called via callback from qla2xxx */ 5225 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) 5226 { 5227 struct qla_hw_data *ha = vha->hw; 5228 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5229 5230 if (unlikely(tgt == NULL)) { 5231 ql_dbg(ql_dbg_tgt, vha, 0xe05d, 5232 "qla_target(%d): Response pkt %x received, but no " 5233 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); 5234 return; 5235 } 5236 5237 /* 5238 * In tgt_stop mode we also should allow all requests to pass. 5239 * Otherwise, some commands can stuck. 5240 */ 5241 5242 tgt->irq_cmd_count++; 5243 5244 switch (pkt->entry_type) { 5245 case CTIO_CRC2: 5246 case CTIO_TYPE7: 5247 { 5248 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 5249 qlt_do_ctio_completion(vha, entry->handle, 5250 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5251 entry); 5252 break; 5253 } 5254 5255 case ACCEPT_TGT_IO_TYPE: 5256 { 5257 struct atio_from_isp *atio = (struct atio_from_isp *)pkt; 5258 int rc; 5259 if (atio->u.isp2x.status != 5260 cpu_to_le16(ATIO_CDB_VALID)) { 5261 ql_dbg(ql_dbg_tgt, vha, 0xe05e, 5262 "qla_target(%d): ATIO with error " 5263 "status %x received\n", vha->vp_idx, 5264 le16_to_cpu(atio->u.isp2x.status)); 5265 break; 5266 } 5267 5268 rc = qlt_chk_qfull_thresh_hold(vha, atio); 5269 if (rc != 0) { 5270 tgt->irq_cmd_count--; 5271 return; 5272 } 5273 5274 rc = qlt_handle_cmd_for_atio(vha, atio); 5275 if (unlikely(rc != 0)) { 5276 if (rc == -ESRCH) { 5277 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 5278 qlt_send_busy(vha, atio, 0); 5279 #else 5280 qlt_send_term_exchange(vha, NULL, atio, 1); 5281 #endif 5282 } else { 5283 if (tgt->tgt_stop) { 5284 ql_dbg(ql_dbg_tgt, vha, 0xe05f, 5285 "qla_target: Unable to send " 5286 "command to target, sending TERM " 5287 "EXCHANGE for rsp\n"); 5288 qlt_send_term_exchange(vha, NULL, 5289 atio, 1); 5290 } else { 5291 ql_dbg(ql_dbg_tgt, vha, 0xe060, 5292 "qla_target(%d): Unable to send " 5293 "command to target, sending BUSY " 5294 "status\n", vha->vp_idx); 5295 qlt_send_busy(vha, atio, 0); 5296 } 5297 } 5298 } 5299 } 5300 break; 5301 5302 case CONTINUE_TGT_IO_TYPE: 5303 { 5304 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 5305 qlt_do_ctio_completion(vha, entry->handle, 5306 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5307 entry); 5308 break; 5309 } 5310 5311 case CTIO_A64_TYPE: 5312 { 5313 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 5314 qlt_do_ctio_completion(vha, entry->handle, 5315 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 5316 entry); 5317 break; 5318 } 5319 5320 case IMMED_NOTIFY_TYPE: 5321 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); 5322 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); 5323 break; 5324 5325 case NOTIFY_ACK_TYPE: 5326 if (tgt->notify_ack_expected > 0) { 5327 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 5328 ql_dbg(ql_dbg_tgt, vha, 0xe036, 5329 "NOTIFY_ACK seq %08x status %x\n", 5330 le16_to_cpu(entry->u.isp2x.seq_id), 5331 le16_to_cpu(entry->u.isp2x.status)); 5332 tgt->notify_ack_expected--; 5333 if (entry->u.isp2x.status != 5334 cpu_to_le16(NOTIFY_ACK_SUCCESS)) { 5335 ql_dbg(ql_dbg_tgt, vha, 0xe061, 5336 "qla_target(%d): NOTIFY_ACK " 5337 "failed %x\n", vha->vp_idx, 5338 le16_to_cpu(entry->u.isp2x.status)); 5339 } 5340 } else { 5341 ql_dbg(ql_dbg_tgt, vha, 0xe062, 5342 "qla_target(%d): Unexpected NOTIFY_ACK received\n", 5343 vha->vp_idx); 5344 } 5345 break; 5346 5347 case ABTS_RECV_24XX: 5348 ql_dbg(ql_dbg_tgt, vha, 0xe037, 5349 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); 5350 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); 5351 break; 5352 5353 case ABTS_RESP_24XX: 5354 if (tgt->abts_resp_expected > 0) { 5355 struct abts_resp_from_24xx_fw *entry = 5356 (struct abts_resp_from_24xx_fw *)pkt; 5357 ql_dbg(ql_dbg_tgt, vha, 0xe038, 5358 "ABTS_RESP_24XX: compl_status %x\n", 5359 entry->compl_status); 5360 tgt->abts_resp_expected--; 5361 if (le16_to_cpu(entry->compl_status) != 5362 ABTS_RESP_COMPL_SUCCESS) { 5363 if ((entry->error_subcode1 == 0x1E) && 5364 (entry->error_subcode2 == 0)) { 5365 /* 5366 * We've got a race here: aborted 5367 * exchange not terminated, i.e. 5368 * response for the aborted command was 5369 * sent between the abort request was 5370 * received and processed. 5371 * Unfortunately, the firmware has a 5372 * silly requirement that all aborted 5373 * exchanges must be explicitely 5374 * terminated, otherwise it refuses to 5375 * send responses for the abort 5376 * requests. So, we have to 5377 * (re)terminate the exchange and retry 5378 * the abort response. 5379 */ 5380 qlt_24xx_retry_term_exchange(vha, 5381 entry); 5382 } else 5383 ql_dbg(ql_dbg_tgt, vha, 0xe063, 5384 "qla_target(%d): ABTS_RESP_24XX " 5385 "failed %x (subcode %x:%x)", 5386 vha->vp_idx, entry->compl_status, 5387 entry->error_subcode1, 5388 entry->error_subcode2); 5389 } 5390 } else { 5391 ql_dbg(ql_dbg_tgt, vha, 0xe064, 5392 "qla_target(%d): Unexpected ABTS_RESP_24XX " 5393 "received\n", vha->vp_idx); 5394 } 5395 break; 5396 5397 default: 5398 ql_dbg(ql_dbg_tgt, vha, 0xe065, 5399 "qla_target(%d): Received unknown response pkt " 5400 "type %x\n", vha->vp_idx, pkt->entry_type); 5401 break; 5402 } 5403 5404 tgt->irq_cmd_count--; 5405 } 5406 5407 /* 5408 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 5409 */ 5410 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, 5411 uint16_t *mailbox) 5412 { 5413 struct qla_hw_data *ha = vha->hw; 5414 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 5415 int login_code; 5416 5417 if (!ha->tgt.tgt_ops) 5418 return; 5419 5420 if (unlikely(tgt == NULL)) { 5421 ql_dbg(ql_dbg_tgt, vha, 0xe03a, 5422 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); 5423 return; 5424 } 5425 5426 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && 5427 IS_QLA2100(ha)) 5428 return; 5429 /* 5430 * In tgt_stop mode we also should allow all requests to pass. 5431 * Otherwise, some commands can stuck. 5432 */ 5433 5434 tgt->irq_cmd_count++; 5435 5436 switch (code) { 5437 case MBA_RESET: /* Reset */ 5438 case MBA_SYSTEM_ERR: /* System Error */ 5439 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ 5440 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ 5441 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, 5442 "qla_target(%d): System error async event %#x " 5443 "occurred", vha->vp_idx, code); 5444 break; 5445 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ 5446 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 5447 break; 5448 5449 case MBA_LOOP_UP: 5450 { 5451 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, 5452 "qla_target(%d): Async LOOP_UP occurred " 5453 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 5454 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5455 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5456 if (tgt->link_reinit_iocb_pending) { 5457 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 5458 0, 0, 0, 0, 0, 0); 5459 tgt->link_reinit_iocb_pending = 0; 5460 } 5461 break; 5462 } 5463 5464 case MBA_LIP_OCCURRED: 5465 case MBA_LOOP_DOWN: 5466 case MBA_LIP_RESET: 5467 case MBA_RSCN_UPDATE: 5468 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, 5469 "qla_target(%d): Async event %#x occurred " 5470 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, 5471 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5472 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5473 break; 5474 5475 case MBA_PORT_UPDATE: 5476 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, 5477 "qla_target(%d): Port update async event %#x " 5478 "occurred: updating the ports database (m[0]=%x, m[1]=%x, " 5479 "m[2]=%x, m[3]=%x)", vha->vp_idx, code, 5480 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 5481 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 5482 5483 login_code = le16_to_cpu(mailbox[2]); 5484 if (login_code == 0x4) 5485 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, 5486 "Async MB 2: Got PLOGI Complete\n"); 5487 else if (login_code == 0x7) 5488 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, 5489 "Async MB 2: Port Logged Out\n"); 5490 break; 5491 5492 default: 5493 break; 5494 } 5495 5496 tgt->irq_cmd_count--; 5497 } 5498 5499 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, 5500 uint16_t loop_id) 5501 { 5502 fc_port_t *fcport; 5503 int rc; 5504 5505 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 5506 if (!fcport) { 5507 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, 5508 "qla_target(%d): Allocation of tmp FC port failed", 5509 vha->vp_idx); 5510 return NULL; 5511 } 5512 5513 fcport->loop_id = loop_id; 5514 5515 rc = qla2x00_get_port_database(vha, fcport, 0); 5516 if (rc != QLA_SUCCESS) { 5517 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, 5518 "qla_target(%d): Failed to retrieve fcport " 5519 "information -- get_port_database() returned %x " 5520 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 5521 kfree(fcport); 5522 return NULL; 5523 } 5524 5525 return fcport; 5526 } 5527 5528 /* Must be called under tgt_mutex */ 5529 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, 5530 uint8_t *s_id) 5531 { 5532 struct qla_tgt_sess *sess = NULL; 5533 fc_port_t *fcport = NULL; 5534 int rc, global_resets; 5535 uint16_t loop_id = 0; 5536 5537 retry: 5538 global_resets = 5539 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count); 5540 5541 rc = qla24xx_get_loop_id(vha, s_id, &loop_id); 5542 if (rc != 0) { 5543 if ((s_id[0] == 0xFF) && 5544 (s_id[1] == 0xFC)) { 5545 /* 5546 * This is Domain Controller, so it should be 5547 * OK to drop SCSI commands from it. 5548 */ 5549 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, 5550 "Unable to find initiator with S_ID %x:%x:%x", 5551 s_id[0], s_id[1], s_id[2]); 5552 } else 5553 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071, 5554 "qla_target(%d): Unable to find " 5555 "initiator with S_ID %x:%x:%x", 5556 vha->vp_idx, s_id[0], s_id[1], 5557 s_id[2]); 5558 return NULL; 5559 } 5560 5561 fcport = qlt_get_port_database(vha, loop_id); 5562 if (!fcport) 5563 return NULL; 5564 5565 if (global_resets != 5566 atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) { 5567 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, 5568 "qla_target(%d): global reset during session discovery " 5569 "(counter was %d, new %d), retrying", vha->vp_idx, 5570 global_resets, 5571 atomic_read(&vha->vha_tgt. 5572 qla_tgt->tgt_global_resets_count)); 5573 goto retry; 5574 } 5575 5576 sess = qlt_create_sess(vha, fcport, true); 5577 5578 kfree(fcport); 5579 return sess; 5580 } 5581 5582 static void qlt_abort_work(struct qla_tgt *tgt, 5583 struct qla_tgt_sess_work_param *prm) 5584 { 5585 struct scsi_qla_host *vha = tgt->vha; 5586 struct qla_hw_data *ha = vha->hw; 5587 struct qla_tgt_sess *sess = NULL; 5588 unsigned long flags; 5589 uint32_t be_s_id; 5590 uint8_t s_id[3]; 5591 int rc; 5592 5593 spin_lock_irqsave(&ha->hardware_lock, flags); 5594 5595 if (tgt->tgt_stop) 5596 goto out_term; 5597 5598 s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; 5599 s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; 5600 s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; 5601 5602 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 5603 (unsigned char *)&be_s_id); 5604 if (!sess) { 5605 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5606 5607 mutex_lock(&vha->vha_tgt.tgt_mutex); 5608 sess = qlt_make_local_sess(vha, s_id); 5609 /* sess has got an extra creation ref */ 5610 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5611 5612 spin_lock_irqsave(&ha->hardware_lock, flags); 5613 if (!sess) 5614 goto out_term; 5615 } else { 5616 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 5617 sess = NULL; 5618 goto out_term; 5619 } 5620 5621 kref_get(&sess->se_sess->sess_kref); 5622 } 5623 5624 if (tgt->tgt_stop) 5625 goto out_term; 5626 5627 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); 5628 if (rc != 0) 5629 goto out_term; 5630 5631 ha->tgt.tgt_ops->put_sess(sess); 5632 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5633 return; 5634 5635 out_term: 5636 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); 5637 if (sess) 5638 ha->tgt.tgt_ops->put_sess(sess); 5639 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5640 } 5641 5642 static void qlt_tmr_work(struct qla_tgt *tgt, 5643 struct qla_tgt_sess_work_param *prm) 5644 { 5645 struct atio_from_isp *a = &prm->tm_iocb2; 5646 struct scsi_qla_host *vha = tgt->vha; 5647 struct qla_hw_data *ha = vha->hw; 5648 struct qla_tgt_sess *sess = NULL; 5649 unsigned long flags; 5650 uint8_t *s_id = NULL; /* to hide compiler warnings */ 5651 int rc; 5652 uint32_t lun, unpacked_lun; 5653 int fn; 5654 void *iocb; 5655 5656 spin_lock_irqsave(&ha->hardware_lock, flags); 5657 5658 if (tgt->tgt_stop) 5659 goto out_term; 5660 5661 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; 5662 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 5663 if (!sess) { 5664 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5665 5666 mutex_lock(&vha->vha_tgt.tgt_mutex); 5667 sess = qlt_make_local_sess(vha, s_id); 5668 /* sess has got an extra creation ref */ 5669 mutex_unlock(&vha->vha_tgt.tgt_mutex); 5670 5671 spin_lock_irqsave(&ha->hardware_lock, flags); 5672 if (!sess) 5673 goto out_term; 5674 } else { 5675 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) { 5676 sess = NULL; 5677 goto out_term; 5678 } 5679 5680 kref_get(&sess->se_sess->sess_kref); 5681 } 5682 5683 iocb = a; 5684 lun = a->u.isp24.fcp_cmnd.lun; 5685 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 5686 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 5687 5688 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 5689 if (rc != 0) 5690 goto out_term; 5691 5692 ha->tgt.tgt_ops->put_sess(sess); 5693 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5694 return; 5695 5696 out_term: 5697 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1); 5698 if (sess) 5699 ha->tgt.tgt_ops->put_sess(sess); 5700 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5701 } 5702 5703 static void qlt_sess_work_fn(struct work_struct *work) 5704 { 5705 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); 5706 struct scsi_qla_host *vha = tgt->vha; 5707 unsigned long flags; 5708 5709 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); 5710 5711 spin_lock_irqsave(&tgt->sess_work_lock, flags); 5712 while (!list_empty(&tgt->sess_works_list)) { 5713 struct qla_tgt_sess_work_param *prm = list_entry( 5714 tgt->sess_works_list.next, typeof(*prm), 5715 sess_works_list_entry); 5716 5717 /* 5718 * This work can be scheduled on several CPUs at time, so we 5719 * must delete the entry to eliminate double processing 5720 */ 5721 list_del(&prm->sess_works_list_entry); 5722 5723 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 5724 5725 switch (prm->type) { 5726 case QLA_TGT_SESS_WORK_ABORT: 5727 qlt_abort_work(tgt, prm); 5728 break; 5729 case QLA_TGT_SESS_WORK_TM: 5730 qlt_tmr_work(tgt, prm); 5731 break; 5732 default: 5733 BUG_ON(1); 5734 break; 5735 } 5736 5737 spin_lock_irqsave(&tgt->sess_work_lock, flags); 5738 5739 kfree(prm); 5740 } 5741 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 5742 } 5743 5744 /* Must be called under tgt_host_action_mutex */ 5745 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) 5746 { 5747 struct qla_tgt *tgt; 5748 5749 if (!QLA_TGT_MODE_ENABLED()) 5750 return 0; 5751 5752 if (!IS_TGT_MODE_CAPABLE(ha)) { 5753 ql_log(ql_log_warn, base_vha, 0xe070, 5754 "This adapter does not support target mode.\n"); 5755 return 0; 5756 } 5757 5758 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, 5759 "Registering target for host %ld(%p).\n", base_vha->host_no, ha); 5760 5761 BUG_ON(base_vha->vha_tgt.qla_tgt != NULL); 5762 5763 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); 5764 if (!tgt) { 5765 ql_dbg(ql_dbg_tgt, base_vha, 0xe066, 5766 "Unable to allocate struct qla_tgt\n"); 5767 return -ENOMEM; 5768 } 5769 5770 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) 5771 base_vha->host->hostt->supported_mode |= MODE_TARGET; 5772 5773 tgt->ha = ha; 5774 tgt->vha = base_vha; 5775 init_waitqueue_head(&tgt->waitQ); 5776 INIT_LIST_HEAD(&tgt->sess_list); 5777 INIT_LIST_HEAD(&tgt->del_sess_list); 5778 INIT_DELAYED_WORK(&tgt->sess_del_work, 5779 (void (*)(struct work_struct *))qlt_del_sess_work_fn); 5780 spin_lock_init(&tgt->sess_work_lock); 5781 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); 5782 INIT_LIST_HEAD(&tgt->sess_works_list); 5783 spin_lock_init(&tgt->srr_lock); 5784 INIT_LIST_HEAD(&tgt->srr_ctio_list); 5785 INIT_LIST_HEAD(&tgt->srr_imm_list); 5786 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); 5787 atomic_set(&tgt->tgt_global_resets_count, 0); 5788 5789 base_vha->vha_tgt.qla_tgt = tgt; 5790 5791 ql_dbg(ql_dbg_tgt, base_vha, 0xe067, 5792 "qla_target(%d): using 64 Bit PCI addressing", 5793 base_vha->vp_idx); 5794 tgt->tgt_enable_64bit_addr = 1; 5795 /* 3 is reserved */ 5796 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); 5797 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; 5798 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; 5799 5800 if (base_vha->fc_vport) 5801 return 0; 5802 5803 mutex_lock(&qla_tgt_mutex); 5804 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); 5805 mutex_unlock(&qla_tgt_mutex); 5806 5807 return 0; 5808 } 5809 5810 /* Must be called under tgt_host_action_mutex */ 5811 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) 5812 { 5813 if (!vha->vha_tgt.qla_tgt) 5814 return 0; 5815 5816 if (vha->fc_vport) { 5817 qlt_release(vha->vha_tgt.qla_tgt); 5818 return 0; 5819 } 5820 5821 /* free left over qfull cmds */ 5822 qlt_init_term_exchange(vha); 5823 5824 mutex_lock(&qla_tgt_mutex); 5825 list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry); 5826 mutex_unlock(&qla_tgt_mutex); 5827 5828 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", 5829 vha->host_no, ha); 5830 qlt_release(vha->vha_tgt.qla_tgt); 5831 5832 return 0; 5833 } 5834 5835 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, 5836 unsigned char *b) 5837 { 5838 int i; 5839 5840 pr_debug("qla2xxx HW vha->node_name: "); 5841 for (i = 0; i < WWN_SIZE; i++) 5842 pr_debug("%02x ", vha->node_name[i]); 5843 pr_debug("\n"); 5844 pr_debug("qla2xxx HW vha->port_name: "); 5845 for (i = 0; i < WWN_SIZE; i++) 5846 pr_debug("%02x ", vha->port_name[i]); 5847 pr_debug("\n"); 5848 5849 pr_debug("qla2xxx passed configfs WWPN: "); 5850 put_unaligned_be64(wwpn, b); 5851 for (i = 0; i < WWN_SIZE; i++) 5852 pr_debug("%02x ", b[i]); 5853 pr_debug("\n"); 5854 } 5855 5856 /** 5857 * qla_tgt_lport_register - register lport with external module 5858 * 5859 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops 5860 * @wwpn: Passwd FC target WWPN 5861 * @callback: lport initialization callback for tcm_qla2xxx code 5862 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data 5863 */ 5864 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn, 5865 u64 npiv_wwpn, u64 npiv_wwnn, 5866 int (*callback)(struct scsi_qla_host *, void *, u64, u64)) 5867 { 5868 struct qla_tgt *tgt; 5869 struct scsi_qla_host *vha; 5870 struct qla_hw_data *ha; 5871 struct Scsi_Host *host; 5872 unsigned long flags; 5873 int rc; 5874 u8 b[WWN_SIZE]; 5875 5876 mutex_lock(&qla_tgt_mutex); 5877 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { 5878 vha = tgt->vha; 5879 ha = vha->hw; 5880 5881 host = vha->host; 5882 if (!host) 5883 continue; 5884 5885 if (!(host->hostt->supported_mode & MODE_TARGET)) 5886 continue; 5887 5888 spin_lock_irqsave(&ha->hardware_lock, flags); 5889 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) { 5890 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", 5891 host->host_no); 5892 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5893 continue; 5894 } 5895 if (tgt->tgt_stop) { 5896 pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n", 5897 host->host_no); 5898 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5899 continue; 5900 } 5901 spin_unlock_irqrestore(&ha->hardware_lock, flags); 5902 5903 if (!scsi_host_get(host)) { 5904 ql_dbg(ql_dbg_tgt, vha, 0xe068, 5905 "Unable to scsi_host_get() for" 5906 " qla2xxx scsi_host\n"); 5907 continue; 5908 } 5909 qlt_lport_dump(vha, phys_wwpn, b); 5910 5911 if (memcmp(vha->port_name, b, WWN_SIZE)) { 5912 scsi_host_put(host); 5913 continue; 5914 } 5915 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn); 5916 if (rc != 0) 5917 scsi_host_put(host); 5918 5919 mutex_unlock(&qla_tgt_mutex); 5920 return rc; 5921 } 5922 mutex_unlock(&qla_tgt_mutex); 5923 5924 return -ENODEV; 5925 } 5926 EXPORT_SYMBOL(qlt_lport_register); 5927 5928 /** 5929 * qla_tgt_lport_deregister - Degister lport 5930 * 5931 * @vha: Registered scsi_qla_host pointer 5932 */ 5933 void qlt_lport_deregister(struct scsi_qla_host *vha) 5934 { 5935 struct qla_hw_data *ha = vha->hw; 5936 struct Scsi_Host *sh = vha->host; 5937 /* 5938 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data 5939 */ 5940 vha->vha_tgt.target_lport_ptr = NULL; 5941 ha->tgt.tgt_ops = NULL; 5942 /* 5943 * Release the Scsi_Host reference for the underlying qla2xxx host 5944 */ 5945 scsi_host_put(sh); 5946 } 5947 EXPORT_SYMBOL(qlt_lport_deregister); 5948 5949 /* Must be called under HW lock */ 5950 static void qlt_set_mode(struct scsi_qla_host *vha) 5951 { 5952 struct qla_hw_data *ha = vha->hw; 5953 5954 switch (ql2x_ini_mode) { 5955 case QLA2XXX_INI_MODE_DISABLED: 5956 case QLA2XXX_INI_MODE_EXCLUSIVE: 5957 vha->host->active_mode = MODE_TARGET; 5958 break; 5959 case QLA2XXX_INI_MODE_ENABLED: 5960 vha->host->active_mode |= MODE_TARGET; 5961 break; 5962 default: 5963 break; 5964 } 5965 5966 if (ha->tgt.ini_mode_force_reverse) 5967 qla_reverse_ini_mode(vha); 5968 } 5969 5970 /* Must be called under HW lock */ 5971 static void qlt_clear_mode(struct scsi_qla_host *vha) 5972 { 5973 struct qla_hw_data *ha = vha->hw; 5974 5975 switch (ql2x_ini_mode) { 5976 case QLA2XXX_INI_MODE_DISABLED: 5977 vha->host->active_mode = MODE_UNKNOWN; 5978 break; 5979 case QLA2XXX_INI_MODE_EXCLUSIVE: 5980 vha->host->active_mode = MODE_INITIATOR; 5981 break; 5982 case QLA2XXX_INI_MODE_ENABLED: 5983 vha->host->active_mode &= ~MODE_TARGET; 5984 break; 5985 default: 5986 break; 5987 } 5988 5989 if (ha->tgt.ini_mode_force_reverse) 5990 qla_reverse_ini_mode(vha); 5991 } 5992 5993 /* 5994 * qla_tgt_enable_vha - NO LOCK HELD 5995 * 5996 * host_reset, bring up w/ Target Mode Enabled 5997 */ 5998 void 5999 qlt_enable_vha(struct scsi_qla_host *vha) 6000 { 6001 struct qla_hw_data *ha = vha->hw; 6002 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 6003 unsigned long flags; 6004 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 6005 6006 if (!tgt) { 6007 ql_dbg(ql_dbg_tgt, vha, 0xe069, 6008 "Unable to locate qla_tgt pointer from" 6009 " struct qla_hw_data\n"); 6010 dump_stack(); 6011 return; 6012 } 6013 6014 spin_lock_irqsave(&ha->hardware_lock, flags); 6015 tgt->tgt_stopped = 0; 6016 qlt_set_mode(vha); 6017 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6018 6019 if (vha->vp_idx) { 6020 qla24xx_disable_vp(vha); 6021 qla24xx_enable_vp(vha); 6022 } else { 6023 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); 6024 qla2xxx_wake_dpc(base_vha); 6025 qla2x00_wait_for_hba_online(base_vha); 6026 } 6027 } 6028 EXPORT_SYMBOL(qlt_enable_vha); 6029 6030 /* 6031 * qla_tgt_disable_vha - NO LOCK HELD 6032 * 6033 * Disable Target Mode and reset the adapter 6034 */ 6035 static void qlt_disable_vha(struct scsi_qla_host *vha) 6036 { 6037 struct qla_hw_data *ha = vha->hw; 6038 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt; 6039 unsigned long flags; 6040 6041 if (!tgt) { 6042 ql_dbg(ql_dbg_tgt, vha, 0xe06a, 6043 "Unable to locate qla_tgt pointer from" 6044 " struct qla_hw_data\n"); 6045 dump_stack(); 6046 return; 6047 } 6048 6049 spin_lock_irqsave(&ha->hardware_lock, flags); 6050 qlt_clear_mode(vha); 6051 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6052 6053 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 6054 qla2xxx_wake_dpc(vha); 6055 qla2x00_wait_for_hba_online(vha); 6056 } 6057 6058 /* 6059 * Called from qla_init.c:qla24xx_vport_create() contex to setup 6060 * the target mode specific struct scsi_qla_host and struct qla_hw_data 6061 * members. 6062 */ 6063 void 6064 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) 6065 { 6066 if (!qla_tgt_mode_enabled(vha)) 6067 return; 6068 6069 vha->vha_tgt.qla_tgt = NULL; 6070 6071 mutex_init(&vha->vha_tgt.tgt_mutex); 6072 mutex_init(&vha->vha_tgt.tgt_host_action_mutex); 6073 6074 qlt_clear_mode(vha); 6075 6076 /* 6077 * NOTE: Currently the value is kept the same for <24xx and 6078 * >=24xx ISPs. If it is necessary to change it, 6079 * the check should be added for specific ISPs, 6080 * assigning the value appropriately. 6081 */ 6082 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; 6083 6084 qlt_add_target(ha, vha); 6085 } 6086 6087 void 6088 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) 6089 { 6090 /* 6091 * FC-4 Feature bit 0 indicates target functionality to the name server. 6092 */ 6093 if (qla_tgt_mode_enabled(vha)) { 6094 if (qla_ini_mode_enabled(vha)) 6095 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; 6096 else 6097 ct_req->req.rff_id.fc4_feature = BIT_0; 6098 } else if (qla_ini_mode_enabled(vha)) { 6099 ct_req->req.rff_id.fc4_feature = BIT_1; 6100 } 6101 } 6102 6103 /* 6104 * qlt_init_atio_q_entries() - Initializes ATIO queue entries. 6105 * @ha: HA context 6106 * 6107 * Beginning of ATIO ring has initialization control block already built 6108 * by nvram config routine. 6109 * 6110 * Returns 0 on success. 6111 */ 6112 void 6113 qlt_init_atio_q_entries(struct scsi_qla_host *vha) 6114 { 6115 struct qla_hw_data *ha = vha->hw; 6116 uint16_t cnt; 6117 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; 6118 6119 if (!qla_tgt_mode_enabled(vha)) 6120 return; 6121 6122 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { 6123 pkt->u.raw.signature = ATIO_PROCESSED; 6124 pkt++; 6125 } 6126 6127 } 6128 6129 /* 6130 * qlt_24xx_process_atio_queue() - Process ATIO queue entries. 6131 * @ha: SCSI driver HA context 6132 */ 6133 void 6134 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha) 6135 { 6136 struct qla_hw_data *ha = vha->hw; 6137 struct atio_from_isp *pkt; 6138 int cnt, i; 6139 6140 if (!vha->flags.online) 6141 return; 6142 6143 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) { 6144 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 6145 cnt = pkt->u.raw.entry_count; 6146 6147 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt); 6148 6149 for (i = 0; i < cnt; i++) { 6150 ha->tgt.atio_ring_index++; 6151 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { 6152 ha->tgt.atio_ring_index = 0; 6153 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; 6154 } else 6155 ha->tgt.atio_ring_ptr++; 6156 6157 pkt->u.raw.signature = ATIO_PROCESSED; 6158 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 6159 } 6160 wmb(); 6161 } 6162 6163 /* Adjust ring index */ 6164 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index); 6165 RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha)); 6166 } 6167 6168 void 6169 qlt_24xx_config_rings(struct scsi_qla_host *vha) 6170 { 6171 struct qla_hw_data *ha = vha->hw; 6172 if (!QLA_TGT_MODE_ENABLED()) 6173 return; 6174 6175 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0); 6176 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0); 6177 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha)); 6178 6179 if (IS_ATIO_MSIX_CAPABLE(ha)) { 6180 struct qla_msix_entry *msix = &ha->msix_entries[2]; 6181 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; 6182 6183 icb->msix_atio = cpu_to_le16(msix->entry); 6184 ql_dbg(ql_dbg_init, vha, 0xf072, 6185 "Registering ICB vector 0x%x for atio que.\n", 6186 msix->entry); 6187 } 6188 } 6189 6190 void 6191 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 6192 { 6193 struct qla_hw_data *ha = vha->hw; 6194 6195 if (qla_tgt_mode_enabled(vha)) { 6196 if (!ha->tgt.saved_set) { 6197 /* We save only once */ 6198 ha->tgt.saved_exchange_count = nv->exchange_count; 6199 ha->tgt.saved_firmware_options_1 = 6200 nv->firmware_options_1; 6201 ha->tgt.saved_firmware_options_2 = 6202 nv->firmware_options_2; 6203 ha->tgt.saved_firmware_options_3 = 6204 nv->firmware_options_3; 6205 ha->tgt.saved_set = 1; 6206 } 6207 6208 nv->exchange_count = cpu_to_le16(0xFFFF); 6209 6210 /* Enable target mode */ 6211 nv->firmware_options_1 |= cpu_to_le32(BIT_4); 6212 6213 /* Disable ini mode, if requested */ 6214 if (!qla_ini_mode_enabled(vha)) 6215 nv->firmware_options_1 |= cpu_to_le32(BIT_5); 6216 6217 /* Disable Full Login after LIP */ 6218 nv->firmware_options_1 &= cpu_to_le32(~BIT_13); 6219 /* Enable initial LIP */ 6220 nv->firmware_options_1 &= cpu_to_le32(~BIT_9); 6221 if (ql2xtgt_tape_enable) 6222 /* Enable FC Tape support */ 6223 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 6224 else 6225 /* Disable FC Tape support */ 6226 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 6227 6228 /* Disable Full Login after LIP */ 6229 nv->host_p &= cpu_to_le32(~BIT_10); 6230 /* Enable target PRLI control */ 6231 nv->firmware_options_2 |= cpu_to_le32(BIT_14); 6232 } else { 6233 if (ha->tgt.saved_set) { 6234 nv->exchange_count = ha->tgt.saved_exchange_count; 6235 nv->firmware_options_1 = 6236 ha->tgt.saved_firmware_options_1; 6237 nv->firmware_options_2 = 6238 ha->tgt.saved_firmware_options_2; 6239 nv->firmware_options_3 = 6240 ha->tgt.saved_firmware_options_3; 6241 } 6242 return; 6243 } 6244 6245 /* out-of-order frames reassembly */ 6246 nv->firmware_options_3 |= BIT_6|BIT_9; 6247 6248 if (ha->tgt.enable_class_2) { 6249 if (vha->flags.init_done) 6250 fc_host_supported_classes(vha->host) = 6251 FC_COS_CLASS2 | FC_COS_CLASS3; 6252 6253 nv->firmware_options_2 |= cpu_to_le32(BIT_8); 6254 } else { 6255 if (vha->flags.init_done) 6256 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 6257 6258 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8); 6259 } 6260 } 6261 6262 void 6263 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, 6264 struct init_cb_24xx *icb) 6265 { 6266 struct qla_hw_data *ha = vha->hw; 6267 6268 if (ha->tgt.node_name_set) { 6269 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 6270 icb->firmware_options_1 |= cpu_to_le32(BIT_14); 6271 } 6272 } 6273 6274 void 6275 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) 6276 { 6277 struct qla_hw_data *ha = vha->hw; 6278 6279 if (!QLA_TGT_MODE_ENABLED()) 6280 return; 6281 6282 if (qla_tgt_mode_enabled(vha)) { 6283 if (!ha->tgt.saved_set) { 6284 /* We save only once */ 6285 ha->tgt.saved_exchange_count = nv->exchange_count; 6286 ha->tgt.saved_firmware_options_1 = 6287 nv->firmware_options_1; 6288 ha->tgt.saved_firmware_options_2 = 6289 nv->firmware_options_2; 6290 ha->tgt.saved_firmware_options_3 = 6291 nv->firmware_options_3; 6292 ha->tgt.saved_set = 1; 6293 } 6294 6295 nv->exchange_count = cpu_to_le16(0xFFFF); 6296 6297 /* Enable target mode */ 6298 nv->firmware_options_1 |= cpu_to_le32(BIT_4); 6299 6300 /* Disable ini mode, if requested */ 6301 if (!qla_ini_mode_enabled(vha)) 6302 nv->firmware_options_1 |= cpu_to_le32(BIT_5); 6303 6304 /* Disable Full Login after LIP */ 6305 nv->firmware_options_1 &= cpu_to_le32(~BIT_13); 6306 /* Enable initial LIP */ 6307 nv->firmware_options_1 &= cpu_to_le32(~BIT_9); 6308 if (ql2xtgt_tape_enable) 6309 /* Enable FC tape support */ 6310 nv->firmware_options_2 |= cpu_to_le32(BIT_12); 6311 else 6312 /* Disable FC tape support */ 6313 nv->firmware_options_2 &= cpu_to_le32(~BIT_12); 6314 6315 /* Disable Full Login after LIP */ 6316 nv->host_p &= cpu_to_le32(~BIT_10); 6317 /* Enable target PRLI control */ 6318 nv->firmware_options_2 |= cpu_to_le32(BIT_14); 6319 } else { 6320 if (ha->tgt.saved_set) { 6321 nv->exchange_count = ha->tgt.saved_exchange_count; 6322 nv->firmware_options_1 = 6323 ha->tgt.saved_firmware_options_1; 6324 nv->firmware_options_2 = 6325 ha->tgt.saved_firmware_options_2; 6326 nv->firmware_options_3 = 6327 ha->tgt.saved_firmware_options_3; 6328 } 6329 return; 6330 } 6331 6332 /* out-of-order frames reassembly */ 6333 nv->firmware_options_3 |= BIT_6|BIT_9; 6334 6335 if (ha->tgt.enable_class_2) { 6336 if (vha->flags.init_done) 6337 fc_host_supported_classes(vha->host) = 6338 FC_COS_CLASS2 | FC_COS_CLASS3; 6339 6340 nv->firmware_options_2 |= cpu_to_le32(BIT_8); 6341 } else { 6342 if (vha->flags.init_done) 6343 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 6344 6345 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8); 6346 } 6347 } 6348 6349 void 6350 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha, 6351 struct init_cb_81xx *icb) 6352 { 6353 struct qla_hw_data *ha = vha->hw; 6354 6355 if (!QLA_TGT_MODE_ENABLED()) 6356 return; 6357 6358 if (ha->tgt.node_name_set) { 6359 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 6360 icb->firmware_options_1 |= cpu_to_le32(BIT_14); 6361 } 6362 } 6363 6364 void 6365 qlt_83xx_iospace_config(struct qla_hw_data *ha) 6366 { 6367 if (!QLA_TGT_MODE_ENABLED()) 6368 return; 6369 6370 ha->msix_count += 1; /* For ATIO Q */ 6371 } 6372 6373 int 6374 qlt_24xx_process_response_error(struct scsi_qla_host *vha, 6375 struct sts_entry_24xx *pkt) 6376 { 6377 switch (pkt->entry_type) { 6378 case ABTS_RECV_24XX: 6379 case ABTS_RESP_24XX: 6380 case CTIO_TYPE7: 6381 case NOTIFY_ACK_TYPE: 6382 case CTIO_CRC2: 6383 return 1; 6384 default: 6385 return 0; 6386 } 6387 } 6388 6389 void 6390 qlt_modify_vp_config(struct scsi_qla_host *vha, 6391 struct vp_config_entry_24xx *vpmod) 6392 { 6393 if (qla_tgt_mode_enabled(vha)) 6394 vpmod->options_idx1 &= ~BIT_5; 6395 /* Disable ini mode, if requested */ 6396 if (!qla_ini_mode_enabled(vha)) 6397 vpmod->options_idx1 &= ~BIT_4; 6398 } 6399 6400 void 6401 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) 6402 { 6403 if (!QLA_TGT_MODE_ENABLED()) 6404 return; 6405 6406 if (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) { 6407 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in; 6408 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out; 6409 } else { 6410 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in; 6411 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out; 6412 } 6413 6414 mutex_init(&base_vha->vha_tgt.tgt_mutex); 6415 mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex); 6416 qlt_clear_mode(base_vha); 6417 } 6418 6419 irqreturn_t 6420 qla83xx_msix_atio_q(int irq, void *dev_id) 6421 { 6422 struct rsp_que *rsp; 6423 scsi_qla_host_t *vha; 6424 struct qla_hw_data *ha; 6425 unsigned long flags; 6426 6427 rsp = (struct rsp_que *) dev_id; 6428 ha = rsp->hw; 6429 vha = pci_get_drvdata(ha->pdev); 6430 6431 spin_lock_irqsave(&ha->hardware_lock, flags); 6432 6433 qlt_24xx_process_atio_queue(vha); 6434 qla24xx_process_response_queue(vha, rsp); 6435 6436 spin_unlock_irqrestore(&ha->hardware_lock, flags); 6437 6438 return IRQ_HANDLED; 6439 } 6440 6441 int 6442 qlt_mem_alloc(struct qla_hw_data *ha) 6443 { 6444 if (!QLA_TGT_MODE_ENABLED()) 6445 return 0; 6446 6447 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * 6448 MAX_MULTI_ID_FABRIC, GFP_KERNEL); 6449 if (!ha->tgt.tgt_vp_map) 6450 return -ENOMEM; 6451 6452 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, 6453 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), 6454 &ha->tgt.atio_dma, GFP_KERNEL); 6455 if (!ha->tgt.atio_ring) { 6456 kfree(ha->tgt.tgt_vp_map); 6457 return -ENOMEM; 6458 } 6459 return 0; 6460 } 6461 6462 void 6463 qlt_mem_free(struct qla_hw_data *ha) 6464 { 6465 if (!QLA_TGT_MODE_ENABLED()) 6466 return; 6467 6468 if (ha->tgt.atio_ring) { 6469 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * 6470 sizeof(struct atio_from_isp), ha->tgt.atio_ring, 6471 ha->tgt.atio_dma); 6472 } 6473 kfree(ha->tgt.tgt_vp_map); 6474 } 6475 6476 /* vport_slock to be held by the caller */ 6477 void 6478 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) 6479 { 6480 if (!QLA_TGT_MODE_ENABLED()) 6481 return; 6482 6483 switch (cmd) { 6484 case SET_VP_IDX: 6485 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; 6486 break; 6487 case SET_AL_PA: 6488 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; 6489 break; 6490 case RESET_VP_IDX: 6491 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; 6492 break; 6493 case RESET_AL_PA: 6494 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; 6495 break; 6496 } 6497 } 6498 6499 static int __init qlt_parse_ini_mode(void) 6500 { 6501 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) 6502 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 6503 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) 6504 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; 6505 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) 6506 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; 6507 else 6508 return false; 6509 6510 return true; 6511 } 6512 6513 int __init qlt_init(void) 6514 { 6515 int ret; 6516 6517 if (!qlt_parse_ini_mode()) { 6518 ql_log(ql_log_fatal, NULL, 0xe06b, 6519 "qlt_parse_ini_mode() failed\n"); 6520 return -EINVAL; 6521 } 6522 6523 if (!QLA_TGT_MODE_ENABLED()) 6524 return 0; 6525 6526 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", 6527 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct 6528 qla_tgt_mgmt_cmd), 0, NULL); 6529 if (!qla_tgt_mgmt_cmd_cachep) { 6530 ql_log(ql_log_fatal, NULL, 0xe06d, 6531 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); 6532 return -ENOMEM; 6533 } 6534 6535 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, 6536 mempool_free_slab, qla_tgt_mgmt_cmd_cachep); 6537 if (!qla_tgt_mgmt_cmd_mempool) { 6538 ql_log(ql_log_fatal, NULL, 0xe06e, 6539 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); 6540 ret = -ENOMEM; 6541 goto out_mgmt_cmd_cachep; 6542 } 6543 6544 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); 6545 if (!qla_tgt_wq) { 6546 ql_log(ql_log_fatal, NULL, 0xe06f, 6547 "alloc_workqueue for qla_tgt_wq failed\n"); 6548 ret = -ENOMEM; 6549 goto out_cmd_mempool; 6550 } 6551 /* 6552 * Return 1 to signal that initiator-mode is being disabled 6553 */ 6554 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; 6555 6556 out_cmd_mempool: 6557 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 6558 out_mgmt_cmd_cachep: 6559 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 6560 return ret; 6561 } 6562 6563 void qlt_exit(void) 6564 { 6565 if (!QLA_TGT_MODE_ENABLED()) 6566 return; 6567 6568 destroy_workqueue(qla_tgt_wq); 6569 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 6570 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 6571 } 6572