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