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) 2010-2011 Nicholas A. Bellinger <nab@kernel.org> 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * as published by the Free Software Foundation, version 2 18 * of the License. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/init.h> 28 #include <linux/types.h> 29 #include <linux/blkdev.h> 30 #include <linux/interrupt.h> 31 #include <linux/pci.h> 32 #include <linux/delay.h> 33 #include <linux/list.h> 34 #include <linux/workqueue.h> 35 #include <asm/unaligned.h> 36 #include <scsi/scsi.h> 37 #include <scsi/scsi_host.h> 38 #include <scsi/scsi_tcq.h> 39 #include <target/target_core_base.h> 40 #include <target/target_core_fabric.h> 41 42 #include "qla_def.h" 43 #include "qla_target.h" 44 45 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED; 46 module_param(qlini_mode, charp, S_IRUGO); 47 MODULE_PARM_DESC(qlini_mode, 48 "Determines when initiator mode will be enabled. Possible values: " 49 "\"exclusive\" - initiator mode will be enabled on load, " 50 "disabled on enabling target mode and then on disabling target mode " 51 "enabled back; " 52 "\"disabled\" - initiator mode will never be enabled; " 53 "\"enabled\" (default) - initiator mode will always stay enabled."); 54 55 static int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 56 57 /* 58 * From scsi/fc/fc_fcp.h 59 */ 60 enum fcp_resp_rsp_codes { 61 FCP_TMF_CMPL = 0, 62 FCP_DATA_LEN_INVALID = 1, 63 FCP_CMND_FIELDS_INVALID = 2, 64 FCP_DATA_PARAM_MISMATCH = 3, 65 FCP_TMF_REJECTED = 4, 66 FCP_TMF_FAILED = 5, 67 FCP_TMF_INVALID_LUN = 9, 68 }; 69 70 /* 71 * fc_pri_ta from scsi/fc/fc_fcp.h 72 */ 73 #define FCP_PTA_SIMPLE 0 /* simple task attribute */ 74 #define FCP_PTA_HEADQ 1 /* head of queue task attribute */ 75 #define FCP_PTA_ORDERED 2 /* ordered task attribute */ 76 #define FCP_PTA_ACA 4 /* auto. contingent allegiance */ 77 #define FCP_PTA_MASK 7 /* mask for task attribute field */ 78 #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */ 79 #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */ 80 81 /* 82 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which 83 * must be called under HW lock and could unlock/lock it inside. 84 * It isn't an issue, since in the current implementation on the time when 85 * those functions are called: 86 * 87 * - Either context is IRQ and only IRQ handler can modify HW data, 88 * including rings related fields, 89 * 90 * - Or access to target mode variables from struct qla_tgt doesn't 91 * cross those functions boundaries, except tgt_stop, which 92 * additionally protected by irq_cmd_count. 93 */ 94 /* Predefs for callbacks handed to qla2xxx LLD */ 95 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha, 96 struct atio_from_isp *pkt); 97 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt); 98 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 99 int fn, void *iocb, int flags); 100 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd 101 *cmd, struct atio_from_isp *atio, int ha_locked); 102 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha, 103 struct qla_tgt_srr_imm *imm, int ha_lock); 104 /* 105 * Global Variables 106 */ 107 static struct kmem_cache *qla_tgt_cmd_cachep; 108 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep; 109 static mempool_t *qla_tgt_mgmt_cmd_mempool; 110 static struct workqueue_struct *qla_tgt_wq; 111 static DEFINE_MUTEX(qla_tgt_mutex); 112 static LIST_HEAD(qla_tgt_glist); 113 114 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */ 115 static struct qla_tgt_sess *qlt_find_sess_by_port_name( 116 struct qla_tgt *tgt, 117 const uint8_t *port_name) 118 { 119 struct qla_tgt_sess *sess; 120 121 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { 122 if (!memcmp(sess->port_name, port_name, WWN_SIZE)) 123 return sess; 124 } 125 126 return NULL; 127 } 128 129 /* Might release hw lock, then reaquire!! */ 130 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked) 131 { 132 /* Send marker if required */ 133 if (unlikely(vha->marker_needed != 0)) { 134 int rc = qla2x00_issue_marker(vha, vha_locked); 135 if (rc != QLA_SUCCESS) { 136 ql_dbg(ql_dbg_tgt, vha, 0xe03d, 137 "qla_target(%d): issue_marker() failed\n", 138 vha->vp_idx); 139 } 140 return rc; 141 } 142 return QLA_SUCCESS; 143 } 144 145 static inline 146 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha, 147 uint8_t *d_id) 148 { 149 struct qla_hw_data *ha = vha->hw; 150 uint8_t vp_idx; 151 152 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0])) 153 return NULL; 154 155 if (vha->d_id.b.al_pa == d_id[2]) 156 return vha; 157 158 BUG_ON(ha->tgt.tgt_vp_map == NULL); 159 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx; 160 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 161 return ha->tgt.tgt_vp_map[vp_idx].vha; 162 163 return NULL; 164 } 165 166 static inline 167 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha, 168 uint16_t vp_idx) 169 { 170 struct qla_hw_data *ha = vha->hw; 171 172 if (vha->vp_idx == vp_idx) 173 return vha; 174 175 BUG_ON(ha->tgt.tgt_vp_map == NULL); 176 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 177 return ha->tgt.tgt_vp_map[vp_idx].vha; 178 179 return NULL; 180 } 181 182 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, 183 struct atio_from_isp *atio) 184 { 185 switch (atio->u.raw.entry_type) { 186 case ATIO_TYPE7: 187 { 188 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha, 189 atio->u.isp24.fcp_hdr.d_id); 190 if (unlikely(NULL == host)) { 191 ql_dbg(ql_dbg_tgt, vha, 0xe03e, 192 "qla_target(%d): Received ATIO_TYPE7 " 193 "with unknown d_id %x:%x:%x\n", vha->vp_idx, 194 atio->u.isp24.fcp_hdr.d_id[0], 195 atio->u.isp24.fcp_hdr.d_id[1], 196 atio->u.isp24.fcp_hdr.d_id[2]); 197 break; 198 } 199 qlt_24xx_atio_pkt(host, atio); 200 break; 201 } 202 203 case IMMED_NOTIFY_TYPE: 204 { 205 struct scsi_qla_host *host = vha; 206 struct imm_ntfy_from_isp *entry = 207 (struct imm_ntfy_from_isp *)atio; 208 209 if ((entry->u.isp24.vp_index != 0xFF) && 210 (entry->u.isp24.nport_handle != 0xFFFF)) { 211 host = qlt_find_host_by_vp_idx(vha, 212 entry->u.isp24.vp_index); 213 if (unlikely(!host)) { 214 ql_dbg(ql_dbg_tgt, vha, 0xe03f, 215 "qla_target(%d): Received " 216 "ATIO (IMMED_NOTIFY_TYPE) " 217 "with unknown vp_index %d\n", 218 vha->vp_idx, entry->u.isp24.vp_index); 219 break; 220 } 221 } 222 qlt_24xx_atio_pkt(host, atio); 223 break; 224 } 225 226 default: 227 ql_dbg(ql_dbg_tgt, vha, 0xe040, 228 "qla_target(%d): Received unknown ATIO atio " 229 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 230 break; 231 } 232 233 return; 234 } 235 236 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt) 237 { 238 switch (pkt->entry_type) { 239 case CTIO_TYPE7: 240 { 241 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 242 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 243 entry->vp_index); 244 if (unlikely(!host)) { 245 ql_dbg(ql_dbg_tgt, vha, 0xe041, 246 "qla_target(%d): Response pkt (CTIO_TYPE7) " 247 "received, with unknown vp_index %d\n", 248 vha->vp_idx, entry->vp_index); 249 break; 250 } 251 qlt_response_pkt(host, pkt); 252 break; 253 } 254 255 case IMMED_NOTIFY_TYPE: 256 { 257 struct scsi_qla_host *host = vha; 258 struct imm_ntfy_from_isp *entry = 259 (struct imm_ntfy_from_isp *)pkt; 260 261 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); 262 if (unlikely(!host)) { 263 ql_dbg(ql_dbg_tgt, vha, 0xe042, 264 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) " 265 "received, with unknown vp_index %d\n", 266 vha->vp_idx, entry->u.isp24.vp_index); 267 break; 268 } 269 qlt_response_pkt(host, pkt); 270 break; 271 } 272 273 case NOTIFY_ACK_TYPE: 274 { 275 struct scsi_qla_host *host = vha; 276 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 277 278 if (0xFF != entry->u.isp24.vp_index) { 279 host = qlt_find_host_by_vp_idx(vha, 280 entry->u.isp24.vp_index); 281 if (unlikely(!host)) { 282 ql_dbg(ql_dbg_tgt, vha, 0xe043, 283 "qla_target(%d): Response " 284 "pkt (NOTIFY_ACK_TYPE) " 285 "received, with unknown " 286 "vp_index %d\n", vha->vp_idx, 287 entry->u.isp24.vp_index); 288 break; 289 } 290 } 291 qlt_response_pkt(host, pkt); 292 break; 293 } 294 295 case ABTS_RECV_24XX: 296 { 297 struct abts_recv_from_24xx *entry = 298 (struct abts_recv_from_24xx *)pkt; 299 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 300 entry->vp_index); 301 if (unlikely(!host)) { 302 ql_dbg(ql_dbg_tgt, vha, 0xe044, 303 "qla_target(%d): Response pkt " 304 "(ABTS_RECV_24XX) received, with unknown " 305 "vp_index %d\n", vha->vp_idx, entry->vp_index); 306 break; 307 } 308 qlt_response_pkt(host, pkt); 309 break; 310 } 311 312 case ABTS_RESP_24XX: 313 { 314 struct abts_resp_to_24xx *entry = 315 (struct abts_resp_to_24xx *)pkt; 316 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 317 entry->vp_index); 318 if (unlikely(!host)) { 319 ql_dbg(ql_dbg_tgt, vha, 0xe045, 320 "qla_target(%d): Response pkt " 321 "(ABTS_RECV_24XX) received, with unknown " 322 "vp_index %d\n", vha->vp_idx, entry->vp_index); 323 break; 324 } 325 qlt_response_pkt(host, pkt); 326 break; 327 } 328 329 default: 330 qlt_response_pkt(vha, pkt); 331 break; 332 } 333 334 } 335 336 static void qlt_free_session_done(struct work_struct *work) 337 { 338 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess, 339 free_work); 340 struct qla_tgt *tgt = sess->tgt; 341 struct scsi_qla_host *vha = sess->vha; 342 struct qla_hw_data *ha = vha->hw; 343 344 BUG_ON(!tgt); 345 /* 346 * Release the target session for FC Nexus from fabric module code. 347 */ 348 if (sess->se_sess != NULL) 349 ha->tgt.tgt_ops->free_session(sess); 350 351 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001, 352 "Unregistration of sess %p finished\n", sess); 353 354 kfree(sess); 355 /* 356 * We need to protect against race, when tgt is freed before or 357 * inside wake_up() 358 */ 359 tgt->sess_count--; 360 if (tgt->sess_count == 0) 361 wake_up_all(&tgt->waitQ); 362 } 363 364 /* ha->hardware_lock supposed to be held on entry */ 365 void qlt_unreg_sess(struct qla_tgt_sess *sess) 366 { 367 struct scsi_qla_host *vha = sess->vha; 368 369 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess); 370 371 list_del(&sess->sess_list_entry); 372 if (sess->deleted) 373 list_del(&sess->del_list_entry); 374 375 INIT_WORK(&sess->free_work, qlt_free_session_done); 376 schedule_work(&sess->free_work); 377 } 378 EXPORT_SYMBOL(qlt_unreg_sess); 379 380 /* ha->hardware_lock supposed to be held on entry */ 381 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) 382 { 383 struct qla_hw_data *ha = vha->hw; 384 struct qla_tgt_sess *sess = NULL; 385 uint32_t unpacked_lun, lun = 0; 386 uint16_t loop_id; 387 int res = 0; 388 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb; 389 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 390 391 loop_id = le16_to_cpu(n->u.isp24.nport_handle); 392 if (loop_id == 0xFFFF) { 393 #if 0 /* FIXME: Re-enable Global event handling.. */ 394 /* Global event */ 395 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count); 396 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1); 397 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) { 398 sess = list_entry(ha->tgt.qla_tgt->sess_list.next, 399 typeof(*sess), sess_list_entry); 400 switch (mcmd) { 401 case QLA_TGT_NEXUS_LOSS_SESS: 402 mcmd = QLA_TGT_NEXUS_LOSS; 403 break; 404 case QLA_TGT_ABORT_ALL_SESS: 405 mcmd = QLA_TGT_ABORT_ALL; 406 break; 407 case QLA_TGT_NEXUS_LOSS: 408 case QLA_TGT_ABORT_ALL: 409 break; 410 default: 411 ql_dbg(ql_dbg_tgt, vha, 0xe046, 412 "qla_target(%d): Not allowed " 413 "command %x in %s", vha->vp_idx, 414 mcmd, __func__); 415 sess = NULL; 416 break; 417 } 418 } else 419 sess = NULL; 420 #endif 421 } else { 422 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 423 } 424 425 ql_dbg(ql_dbg_tgt, vha, 0xe000, 426 "Using sess for qla_tgt_reset: %p\n", sess); 427 if (!sess) { 428 res = -ESRCH; 429 return res; 430 } 431 432 ql_dbg(ql_dbg_tgt, vha, 0xe047, 433 "scsi(%ld): resetting (session %p from port " 434 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, " 435 "mcmd %x, loop_id %d)\n", vha->host_no, sess, 436 sess->port_name[0], sess->port_name[1], 437 sess->port_name[2], sess->port_name[3], 438 sess->port_name[4], sess->port_name[5], 439 sess->port_name[6], sess->port_name[7], 440 mcmd, loop_id); 441 442 lun = a->u.isp24.fcp_cmnd.lun; 443 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 444 445 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd, 446 iocb, QLA24XX_MGMT_SEND_NACK); 447 } 448 449 /* ha->hardware_lock supposed to be held on entry */ 450 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess, 451 bool immediate) 452 { 453 struct qla_tgt *tgt = sess->tgt; 454 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5; 455 456 if (sess->deleted) 457 return; 458 459 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, 460 "Scheduling sess %p for deletion\n", sess); 461 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list); 462 sess->deleted = 1; 463 464 if (immediate) 465 dev_loss_tmo = 0; 466 467 sess->expires = jiffies + dev_loss_tmo * HZ; 468 469 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048, 470 "qla_target(%d): session for port %02x:%02x:%02x:" 471 "%02x:%02x:%02x:%02x:%02x (loop ID %d) scheduled for " 472 "deletion in %u secs (expires: %lu) immed: %d\n", 473 sess->vha->vp_idx, 474 sess->port_name[0], sess->port_name[1], 475 sess->port_name[2], sess->port_name[3], 476 sess->port_name[4], sess->port_name[5], 477 sess->port_name[6], sess->port_name[7], 478 sess->loop_id, dev_loss_tmo, sess->expires, immediate); 479 480 if (immediate) 481 schedule_delayed_work(&tgt->sess_del_work, 0); 482 else 483 schedule_delayed_work(&tgt->sess_del_work, 484 jiffies - sess->expires); 485 } 486 487 /* ha->hardware_lock supposed to be held on entry */ 488 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only) 489 { 490 struct qla_tgt_sess *sess; 491 492 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) 493 qlt_schedule_sess_for_deletion(sess, true); 494 495 /* At this point tgt could be already dead */ 496 } 497 498 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id, 499 uint16_t *loop_id) 500 { 501 struct qla_hw_data *ha = vha->hw; 502 dma_addr_t gid_list_dma; 503 struct gid_list_info *gid_list; 504 char *id_iter; 505 int res, rc, i; 506 uint16_t entries; 507 508 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 509 &gid_list_dma, GFP_KERNEL); 510 if (!gid_list) { 511 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044, 512 "qla_target(%d): DMA Alloc failed of %u\n", 513 vha->vp_idx, qla2x00_gid_list_size(ha)); 514 return -ENOMEM; 515 } 516 517 /* Get list of logged in devices */ 518 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries); 519 if (rc != QLA_SUCCESS) { 520 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045, 521 "qla_target(%d): get_id_list() failed: %x\n", 522 vha->vp_idx, rc); 523 res = -1; 524 goto out_free_id_list; 525 } 526 527 id_iter = (char *)gid_list; 528 res = -1; 529 for (i = 0; i < entries; i++) { 530 struct gid_list_info *gid = (struct gid_list_info *)id_iter; 531 if ((gid->al_pa == s_id[2]) && 532 (gid->area == s_id[1]) && 533 (gid->domain == s_id[0])) { 534 *loop_id = le16_to_cpu(gid->loop_id); 535 res = 0; 536 break; 537 } 538 id_iter += ha->gid_list_info_size; 539 } 540 541 out_free_id_list: 542 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 543 gid_list, gid_list_dma); 544 return res; 545 } 546 547 static bool qlt_check_fcport_exist(struct scsi_qla_host *vha, 548 struct qla_tgt_sess *sess) 549 { 550 struct qla_hw_data *ha = vha->hw; 551 struct qla_port_24xx_data *pmap24; 552 bool res, found = false; 553 int rc, i; 554 uint16_t loop_id = 0xFFFF; /* to eliminate compiler's warning */ 555 uint16_t entries; 556 void *pmap; 557 int pmap_len; 558 fc_port_t *fcport; 559 int global_resets; 560 unsigned long flags; 561 562 retry: 563 global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count); 564 565 rc = qla2x00_get_node_name_list(vha, &pmap, &pmap_len); 566 if (rc != QLA_SUCCESS) { 567 res = false; 568 goto out; 569 } 570 571 pmap24 = pmap; 572 entries = pmap_len/sizeof(*pmap24); 573 574 for (i = 0; i < entries; ++i) { 575 if (!memcmp(sess->port_name, pmap24[i].port_name, WWN_SIZE)) { 576 loop_id = le16_to_cpu(pmap24[i].loop_id); 577 found = true; 578 break; 579 } 580 } 581 582 kfree(pmap); 583 584 if (!found) { 585 res = false; 586 goto out; 587 } 588 589 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf046, 590 "qlt_check_fcport_exist(): loop_id %d", loop_id); 591 592 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 593 if (fcport == NULL) { 594 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf047, 595 "qla_target(%d): Allocation of tmp FC port failed", 596 vha->vp_idx); 597 res = false; 598 goto out; 599 } 600 601 fcport->loop_id = loop_id; 602 603 rc = qla2x00_get_port_database(vha, fcport, 0); 604 if (rc != QLA_SUCCESS) { 605 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf048, 606 "qla_target(%d): Failed to retrieve fcport " 607 "information -- get_port_database() returned %x " 608 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 609 res = false; 610 goto out_free_fcport; 611 } 612 613 if (global_resets != 614 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) { 615 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002, 616 "qla_target(%d): global reset during session discovery" 617 " (counter was %d, new %d), retrying", 618 vha->vp_idx, global_resets, 619 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)); 620 goto retry; 621 } 622 623 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003, 624 "Updating sess %p s_id %x:%x:%x, loop_id %d) to d_id %x:%x:%x, " 625 "loop_id %d", sess, sess->s_id.b.domain, sess->s_id.b.al_pa, 626 sess->s_id.b.area, sess->loop_id, fcport->d_id.b.domain, 627 fcport->d_id.b.al_pa, fcport->d_id.b.area, fcport->loop_id); 628 629 spin_lock_irqsave(&ha->hardware_lock, flags); 630 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 631 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 632 spin_unlock_irqrestore(&ha->hardware_lock, flags); 633 634 res = true; 635 636 out_free_fcport: 637 kfree(fcport); 638 639 out: 640 return res; 641 } 642 643 /* ha->hardware_lock supposed to be held on entry */ 644 static void qlt_undelete_sess(struct qla_tgt_sess *sess) 645 { 646 BUG_ON(!sess->deleted); 647 648 list_del(&sess->del_list_entry); 649 sess->deleted = 0; 650 } 651 652 static void qlt_del_sess_work_fn(struct delayed_work *work) 653 { 654 struct qla_tgt *tgt = container_of(work, struct qla_tgt, 655 sess_del_work); 656 struct scsi_qla_host *vha = tgt->vha; 657 struct qla_hw_data *ha = vha->hw; 658 struct qla_tgt_sess *sess; 659 unsigned long flags; 660 661 spin_lock_irqsave(&ha->hardware_lock, flags); 662 while (!list_empty(&tgt->del_sess_list)) { 663 sess = list_entry(tgt->del_sess_list.next, typeof(*sess), 664 del_list_entry); 665 if (time_after_eq(jiffies, sess->expires)) { 666 bool cancel; 667 668 qlt_undelete_sess(sess); 669 670 spin_unlock_irqrestore(&ha->hardware_lock, flags); 671 cancel = qlt_check_fcport_exist(vha, sess); 672 673 if (cancel) { 674 if (sess->deleted) { 675 /* 676 * sess was again deleted while we were 677 * discovering it 678 */ 679 spin_lock_irqsave(&ha->hardware_lock, 680 flags); 681 continue; 682 } 683 684 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf049, 685 "qla_target(%d): cancel deletion of " 686 "session for port %02x:%02x:%02x:%02x:%02x:" 687 "%02x:%02x:%02x (loop ID %d), because " 688 " it isn't deleted by firmware", 689 vha->vp_idx, sess->port_name[0], 690 sess->port_name[1], sess->port_name[2], 691 sess->port_name[3], sess->port_name[4], 692 sess->port_name[5], sess->port_name[6], 693 sess->port_name[7], sess->loop_id); 694 } else { 695 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004, 696 "Timeout: sess %p about to be deleted\n", 697 sess); 698 ha->tgt.tgt_ops->shutdown_sess(sess); 699 ha->tgt.tgt_ops->put_sess(sess); 700 } 701 702 spin_lock_irqsave(&ha->hardware_lock, flags); 703 } else { 704 schedule_delayed_work(&tgt->sess_del_work, 705 jiffies - sess->expires); 706 break; 707 } 708 } 709 spin_unlock_irqrestore(&ha->hardware_lock, flags); 710 } 711 712 /* 713 * Adds an extra ref to allow to drop hw lock after adding sess to the list. 714 * Caller must put it. 715 */ 716 static struct qla_tgt_sess *qlt_create_sess( 717 struct scsi_qla_host *vha, 718 fc_port_t *fcport, 719 bool local) 720 { 721 struct qla_hw_data *ha = vha->hw; 722 struct qla_tgt_sess *sess; 723 unsigned long flags; 724 unsigned char be_sid[3]; 725 726 /* Check to avoid double sessions */ 727 spin_lock_irqsave(&ha->hardware_lock, flags); 728 list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list, 729 sess_list_entry) { 730 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) { 731 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005, 732 "Double sess %p found (s_id %x:%x:%x, " 733 "loop_id %d), updating to d_id %x:%x:%x, " 734 "loop_id %d", sess, sess->s_id.b.domain, 735 sess->s_id.b.al_pa, sess->s_id.b.area, 736 sess->loop_id, fcport->d_id.b.domain, 737 fcport->d_id.b.al_pa, fcport->d_id.b.area, 738 fcport->loop_id); 739 740 if (sess->deleted) 741 qlt_undelete_sess(sess); 742 743 kref_get(&sess->se_sess->sess_kref); 744 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 745 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 746 747 if (sess->local && !local) 748 sess->local = 0; 749 spin_unlock_irqrestore(&ha->hardware_lock, flags); 750 751 return sess; 752 } 753 } 754 spin_unlock_irqrestore(&ha->hardware_lock, flags); 755 756 sess = kzalloc(sizeof(*sess), GFP_KERNEL); 757 if (!sess) { 758 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a, 759 "qla_target(%u): session allocation failed, " 760 "all commands from port %02x:%02x:%02x:%02x:" 761 "%02x:%02x:%02x:%02x will be refused", vha->vp_idx, 762 fcport->port_name[0], fcport->port_name[1], 763 fcport->port_name[2], fcport->port_name[3], 764 fcport->port_name[4], fcport->port_name[5], 765 fcport->port_name[6], fcport->port_name[7]); 766 767 return NULL; 768 } 769 sess->tgt = ha->tgt.qla_tgt; 770 sess->vha = vha; 771 sess->s_id = fcport->d_id; 772 sess->loop_id = fcport->loop_id; 773 sess->local = local; 774 775 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006, 776 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n", 777 sess, ha->tgt.qla_tgt); 778 779 be_sid[0] = sess->s_id.b.domain; 780 be_sid[1] = sess->s_id.b.area; 781 be_sid[2] = sess->s_id.b.al_pa; 782 /* 783 * Determine if this fc_port->port_name is allowed to access 784 * target mode using explict NodeACLs+MappedLUNs, or using 785 * TPG demo mode. If this is successful a target mode FC nexus 786 * is created. 787 */ 788 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, 789 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) { 790 kfree(sess); 791 return NULL; 792 } 793 /* 794 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess 795 * access across ->hardware_lock reaquire. 796 */ 797 kref_get(&sess->se_sess->sess_kref); 798 799 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED); 800 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name)); 801 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name)); 802 803 spin_lock_irqsave(&ha->hardware_lock, flags); 804 list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list); 805 ha->tgt.qla_tgt->sess_count++; 806 spin_unlock_irqrestore(&ha->hardware_lock, flags); 807 808 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b, 809 "qla_target(%d): %ssession for wwn %02x:%02x:%02x:%02x:" 810 "%02x:%02x:%02x:%02x (loop_id %d, s_id %x:%x:%x, confirmed" 811 " completion %ssupported) added\n", 812 vha->vp_idx, local ? "local " : "", fcport->port_name[0], 813 fcport->port_name[1], fcport->port_name[2], fcport->port_name[3], 814 fcport->port_name[4], fcport->port_name[5], fcport->port_name[6], 815 fcport->port_name[7], fcport->loop_id, sess->s_id.b.domain, 816 sess->s_id.b.area, sess->s_id.b.al_pa, sess->conf_compl_supported ? 817 "" : "not "); 818 819 return sess; 820 } 821 822 /* 823 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port() 824 */ 825 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) 826 { 827 struct qla_hw_data *ha = vha->hw; 828 struct qla_tgt *tgt = ha->tgt.qla_tgt; 829 struct qla_tgt_sess *sess; 830 unsigned long flags; 831 832 if (!vha->hw->tgt.tgt_ops) 833 return; 834 835 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 836 return; 837 838 spin_lock_irqsave(&ha->hardware_lock, flags); 839 if (tgt->tgt_stop) { 840 spin_unlock_irqrestore(&ha->hardware_lock, flags); 841 return; 842 } 843 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 844 if (!sess) { 845 spin_unlock_irqrestore(&ha->hardware_lock, flags); 846 847 mutex_lock(&ha->tgt.tgt_mutex); 848 sess = qlt_create_sess(vha, fcport, false); 849 mutex_unlock(&ha->tgt.tgt_mutex); 850 851 spin_lock_irqsave(&ha->hardware_lock, flags); 852 } else { 853 kref_get(&sess->se_sess->sess_kref); 854 855 if (sess->deleted) { 856 qlt_undelete_sess(sess); 857 858 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c, 859 "qla_target(%u): %ssession for port %02x:" 860 "%02x:%02x:%02x:%02x:%02x:%02x:%02x (loop ID %d) " 861 "reappeared\n", vha->vp_idx, sess->local ? "local " 862 : "", sess->port_name[0], sess->port_name[1], 863 sess->port_name[2], sess->port_name[3], 864 sess->port_name[4], sess->port_name[5], 865 sess->port_name[6], sess->port_name[7], 866 sess->loop_id); 867 868 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007, 869 "Reappeared sess %p\n", sess); 870 } 871 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 872 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 873 } 874 875 if (sess && sess->local) { 876 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d, 877 "qla_target(%u): local session for " 878 "port %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x " 879 "(loop ID %d) became global\n", vha->vp_idx, 880 fcport->port_name[0], fcport->port_name[1], 881 fcport->port_name[2], fcport->port_name[3], 882 fcport->port_name[4], fcport->port_name[5], 883 fcport->port_name[6], fcport->port_name[7], 884 sess->loop_id); 885 sess->local = 0; 886 } 887 spin_unlock_irqrestore(&ha->hardware_lock, flags); 888 889 ha->tgt.tgt_ops->put_sess(sess); 890 } 891 892 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport) 893 { 894 struct qla_hw_data *ha = vha->hw; 895 struct qla_tgt *tgt = ha->tgt.qla_tgt; 896 struct qla_tgt_sess *sess; 897 unsigned long flags; 898 899 if (!vha->hw->tgt.tgt_ops) 900 return; 901 902 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 903 return; 904 905 spin_lock_irqsave(&ha->hardware_lock, flags); 906 if (tgt->tgt_stop) { 907 spin_unlock_irqrestore(&ha->hardware_lock, flags); 908 return; 909 } 910 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 911 if (!sess) { 912 spin_unlock_irqrestore(&ha->hardware_lock, flags); 913 return; 914 } 915 916 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess); 917 918 sess->local = 1; 919 qlt_schedule_sess_for_deletion(sess, false); 920 spin_unlock_irqrestore(&ha->hardware_lock, flags); 921 } 922 923 static inline int test_tgt_sess_count(struct qla_tgt *tgt) 924 { 925 struct qla_hw_data *ha = tgt->ha; 926 unsigned long flags; 927 int res; 928 /* 929 * We need to protect against race, when tgt is freed before or 930 * inside wake_up() 931 */ 932 spin_lock_irqsave(&ha->hardware_lock, flags); 933 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002, 934 "tgt %p, empty(sess_list)=%d sess_count=%d\n", 935 tgt, list_empty(&tgt->sess_list), tgt->sess_count); 936 res = (tgt->sess_count == 0); 937 spin_unlock_irqrestore(&ha->hardware_lock, flags); 938 939 return res; 940 } 941 942 /* Called by tcm_qla2xxx configfs code */ 943 void qlt_stop_phase1(struct qla_tgt *tgt) 944 { 945 struct scsi_qla_host *vha = tgt->vha; 946 struct qla_hw_data *ha = tgt->ha; 947 unsigned long flags; 948 949 if (tgt->tgt_stop || tgt->tgt_stopped) { 950 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e, 951 "Already in tgt->tgt_stop or tgt_stopped state\n"); 952 dump_stack(); 953 return; 954 } 955 956 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n", 957 vha->host_no, vha); 958 /* 959 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted]. 960 * Lock is needed, because we still can get an incoming packet. 961 */ 962 mutex_lock(&ha->tgt.tgt_mutex); 963 spin_lock_irqsave(&ha->hardware_lock, flags); 964 tgt->tgt_stop = 1; 965 qlt_clear_tgt_db(tgt, true); 966 spin_unlock_irqrestore(&ha->hardware_lock, flags); 967 mutex_unlock(&ha->tgt.tgt_mutex); 968 969 flush_delayed_work(&tgt->sess_del_work); 970 971 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009, 972 "Waiting for sess works (tgt %p)", tgt); 973 spin_lock_irqsave(&tgt->sess_work_lock, flags); 974 while (!list_empty(&tgt->sess_works_list)) { 975 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 976 flush_scheduled_work(); 977 spin_lock_irqsave(&tgt->sess_work_lock, flags); 978 } 979 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 980 981 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a, 982 "Waiting for tgt %p: list_empty(sess_list)=%d " 983 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list), 984 tgt->sess_count); 985 986 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 987 988 /* Big hammer */ 989 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha)) 990 qlt_disable_vha(vha); 991 992 /* Wait for sessions to clear out (just in case) */ 993 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 994 } 995 EXPORT_SYMBOL(qlt_stop_phase1); 996 997 /* Called by tcm_qla2xxx configfs code */ 998 void qlt_stop_phase2(struct qla_tgt *tgt) 999 { 1000 struct qla_hw_data *ha = tgt->ha; 1001 unsigned long flags; 1002 1003 if (tgt->tgt_stopped) { 1004 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f, 1005 "Already in tgt->tgt_stopped state\n"); 1006 dump_stack(); 1007 return; 1008 } 1009 1010 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b, 1011 "Waiting for %d IRQ commands to complete (tgt %p)", 1012 tgt->irq_cmd_count, tgt); 1013 1014 mutex_lock(&ha->tgt.tgt_mutex); 1015 spin_lock_irqsave(&ha->hardware_lock, flags); 1016 while (tgt->irq_cmd_count != 0) { 1017 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1018 udelay(2); 1019 spin_lock_irqsave(&ha->hardware_lock, flags); 1020 } 1021 tgt->tgt_stop = 0; 1022 tgt->tgt_stopped = 1; 1023 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1024 mutex_unlock(&ha->tgt.tgt_mutex); 1025 1026 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished", 1027 tgt); 1028 } 1029 EXPORT_SYMBOL(qlt_stop_phase2); 1030 1031 /* Called from qlt_remove_target() -> qla2x00_remove_one() */ 1032 static void qlt_release(struct qla_tgt *tgt) 1033 { 1034 struct qla_hw_data *ha = tgt->ha; 1035 1036 if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped) 1037 qlt_stop_phase2(tgt); 1038 1039 ha->tgt.qla_tgt = NULL; 1040 1041 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d, 1042 "Release of tgt %p finished\n", tgt); 1043 1044 kfree(tgt); 1045 } 1046 1047 /* ha->hardware_lock supposed to be held on entry */ 1048 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type, 1049 const void *param, unsigned int param_size) 1050 { 1051 struct qla_tgt_sess_work_param *prm; 1052 unsigned long flags; 1053 1054 prm = kzalloc(sizeof(*prm), GFP_ATOMIC); 1055 if (!prm) { 1056 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050, 1057 "qla_target(%d): Unable to create session " 1058 "work, command will be refused", 0); 1059 return -ENOMEM; 1060 } 1061 1062 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e, 1063 "Scheduling work (type %d, prm %p)" 1064 " to find session for param %p (size %d, tgt %p)\n", 1065 type, prm, param, param_size, tgt); 1066 1067 prm->type = type; 1068 memcpy(&prm->tm_iocb, param, param_size); 1069 1070 spin_lock_irqsave(&tgt->sess_work_lock, flags); 1071 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list); 1072 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 1073 1074 schedule_work(&tgt->sess_work); 1075 1076 return 0; 1077 } 1078 1079 /* 1080 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1081 */ 1082 static void qlt_send_notify_ack(struct scsi_qla_host *vha, 1083 struct imm_ntfy_from_isp *ntfy, 1084 uint32_t add_flags, uint16_t resp_code, int resp_code_valid, 1085 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan) 1086 { 1087 struct qla_hw_data *ha = vha->hw; 1088 request_t *pkt; 1089 struct nack_to_isp *nack; 1090 1091 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha); 1092 1093 /* Send marker if required */ 1094 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1095 return; 1096 1097 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 1098 if (!pkt) { 1099 ql_dbg(ql_dbg_tgt, vha, 0xe049, 1100 "qla_target(%d): %s failed: unable to allocate " 1101 "request packet\n", vha->vp_idx, __func__); 1102 return; 1103 } 1104 1105 if (ha->tgt.qla_tgt != NULL) 1106 ha->tgt.qla_tgt->notify_ack_expected++; 1107 1108 pkt->entry_type = NOTIFY_ACK_TYPE; 1109 pkt->entry_count = 1; 1110 1111 nack = (struct nack_to_isp *)pkt; 1112 nack->ox_id = ntfy->ox_id; 1113 1114 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 1115 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 1116 nack->u.isp24.flags = ntfy->u.isp24.flags & 1117 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 1118 } 1119 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 1120 nack->u.isp24.status = ntfy->u.isp24.status; 1121 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 1122 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 1123 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 1124 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 1125 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags); 1126 nack->u.isp24.srr_reject_code = srr_reject_code; 1127 nack->u.isp24.srr_reject_code_expl = srr_explan; 1128 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 1129 1130 ql_dbg(ql_dbg_tgt, vha, 0xe005, 1131 "qla_target(%d): Sending 24xx Notify Ack %d\n", 1132 vha->vp_idx, nack->u.isp24.status); 1133 1134 qla2x00_start_iocbs(vha, vha->req); 1135 } 1136 1137 /* 1138 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1139 */ 1140 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha, 1141 struct abts_recv_from_24xx *abts, uint32_t status, 1142 bool ids_reversed) 1143 { 1144 struct qla_hw_data *ha = vha->hw; 1145 struct abts_resp_to_24xx *resp; 1146 uint32_t f_ctl; 1147 uint8_t *p; 1148 1149 ql_dbg(ql_dbg_tgt, vha, 0xe006, 1150 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n", 1151 ha, abts, status); 1152 1153 /* Send marker if required */ 1154 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1155 return; 1156 1157 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL); 1158 if (!resp) { 1159 ql_dbg(ql_dbg_tgt, vha, 0xe04a, 1160 "qla_target(%d): %s failed: unable to allocate " 1161 "request packet", vha->vp_idx, __func__); 1162 return; 1163 } 1164 1165 resp->entry_type = ABTS_RESP_24XX; 1166 resp->entry_count = 1; 1167 resp->nport_handle = abts->nport_handle; 1168 resp->vp_index = vha->vp_idx; 1169 resp->sof_type = abts->sof_type; 1170 resp->exchange_address = abts->exchange_address; 1171 resp->fcp_hdr_le = abts->fcp_hdr_le; 1172 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP | 1173 F_CTL_LAST_SEQ | F_CTL_END_SEQ | 1174 F_CTL_SEQ_INITIATIVE); 1175 p = (uint8_t *)&f_ctl; 1176 resp->fcp_hdr_le.f_ctl[0] = *p++; 1177 resp->fcp_hdr_le.f_ctl[1] = *p++; 1178 resp->fcp_hdr_le.f_ctl[2] = *p; 1179 if (ids_reversed) { 1180 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0]; 1181 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1]; 1182 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2]; 1183 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0]; 1184 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1]; 1185 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2]; 1186 } else { 1187 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0]; 1188 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1]; 1189 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2]; 1190 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0]; 1191 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1]; 1192 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2]; 1193 } 1194 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort; 1195 if (status == FCP_TMF_CMPL) { 1196 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC; 1197 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID; 1198 resp->payload.ba_acct.low_seq_cnt = 0x0000; 1199 resp->payload.ba_acct.high_seq_cnt = 0xFFFF; 1200 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id; 1201 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id; 1202 } else { 1203 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT; 1204 resp->payload.ba_rjt.reason_code = 1205 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM; 1206 /* Other bytes are zero */ 1207 } 1208 1209 ha->tgt.qla_tgt->abts_resp_expected++; 1210 1211 qla2x00_start_iocbs(vha, vha->req); 1212 } 1213 1214 /* 1215 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1216 */ 1217 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha, 1218 struct abts_resp_from_24xx_fw *entry) 1219 { 1220 struct ctio7_to_24xx *ctio; 1221 1222 ql_dbg(ql_dbg_tgt, vha, 0xe007, 1223 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw); 1224 /* Send marker if required */ 1225 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1226 return; 1227 1228 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL); 1229 if (ctio == NULL) { 1230 ql_dbg(ql_dbg_tgt, vha, 0xe04b, 1231 "qla_target(%d): %s failed: unable to allocate " 1232 "request packet\n", vha->vp_idx, __func__); 1233 return; 1234 } 1235 1236 /* 1237 * We've got on entrance firmware's response on by us generated 1238 * ABTS response. So, in it ID fields are reversed. 1239 */ 1240 1241 ctio->entry_type = CTIO_TYPE7; 1242 ctio->entry_count = 1; 1243 ctio->nport_handle = entry->nport_handle; 1244 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1245 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1246 ctio->vp_index = vha->vp_idx; 1247 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0]; 1248 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1]; 1249 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2]; 1250 ctio->exchange_addr = entry->exchange_addr_to_abort; 1251 ctio->u.status1.flags = 1252 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1253 CTIO7_FLAGS_TERMINATE); 1254 ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id; 1255 1256 qla2x00_start_iocbs(vha, vha->req); 1257 1258 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry, 1259 FCP_TMF_CMPL, true); 1260 } 1261 1262 /* ha->hardware_lock supposed to be held on entry */ 1263 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1264 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess) 1265 { 1266 struct qla_hw_data *ha = vha->hw; 1267 struct se_session *se_sess = sess->se_sess; 1268 struct qla_tgt_mgmt_cmd *mcmd; 1269 struct se_cmd *se_cmd; 1270 u32 lun = 0; 1271 int rc; 1272 bool found_lun = false; 1273 1274 spin_lock(&se_sess->sess_cmd_lock); 1275 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { 1276 struct qla_tgt_cmd *cmd = 1277 container_of(se_cmd, struct qla_tgt_cmd, se_cmd); 1278 if (cmd->tag == abts->exchange_addr_to_abort) { 1279 lun = cmd->unpacked_lun; 1280 found_lun = true; 1281 break; 1282 } 1283 } 1284 spin_unlock(&se_sess->sess_cmd_lock); 1285 1286 if (!found_lun) 1287 return -ENOENT; 1288 1289 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f, 1290 "qla_target(%d): task abort (tag=%d)\n", 1291 vha->vp_idx, abts->exchange_addr_to_abort); 1292 1293 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 1294 if (mcmd == NULL) { 1295 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051, 1296 "qla_target(%d): %s: Allocation of ABORT cmd failed", 1297 vha->vp_idx, __func__); 1298 return -ENOMEM; 1299 } 1300 memset(mcmd, 0, sizeof(*mcmd)); 1301 1302 mcmd->sess = sess; 1303 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts)); 1304 1305 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK, 1306 abts->exchange_addr_to_abort); 1307 if (rc != 0) { 1308 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052, 1309 "qla_target(%d): tgt_ops->handle_tmr()" 1310 " failed: %d", vha->vp_idx, rc); 1311 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1312 return -EFAULT; 1313 } 1314 1315 return 0; 1316 } 1317 1318 /* 1319 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1320 */ 1321 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1322 struct abts_recv_from_24xx *abts) 1323 { 1324 struct qla_hw_data *ha = vha->hw; 1325 struct qla_tgt_sess *sess; 1326 uint32_t tag = abts->exchange_addr_to_abort; 1327 uint8_t s_id[3]; 1328 int rc; 1329 1330 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { 1331 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053, 1332 "qla_target(%d): ABTS: Abort Sequence not " 1333 "supported\n", vha->vp_idx); 1334 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1335 return; 1336 } 1337 1338 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { 1339 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010, 1340 "qla_target(%d): ABTS: Unknown Exchange " 1341 "Address received\n", vha->vp_idx); 1342 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1343 return; 1344 } 1345 1346 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011, 1347 "qla_target(%d): task abort (s_id=%x:%x:%x, " 1348 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2], 1349 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag, 1350 le32_to_cpu(abts->fcp_hdr_le.parameter)); 1351 1352 s_id[0] = abts->fcp_hdr_le.s_id[2]; 1353 s_id[1] = abts->fcp_hdr_le.s_id[1]; 1354 s_id[2] = abts->fcp_hdr_le.s_id[0]; 1355 1356 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 1357 if (!sess) { 1358 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012, 1359 "qla_target(%d): task abort for non-existant session\n", 1360 vha->vp_idx); 1361 rc = qlt_sched_sess_work(ha->tgt.qla_tgt, 1362 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts)); 1363 if (rc != 0) { 1364 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, 1365 false); 1366 } 1367 return; 1368 } 1369 1370 rc = __qlt_24xx_handle_abts(vha, abts, sess); 1371 if (rc != 0) { 1372 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, 1373 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n", 1374 vha->vp_idx, rc); 1375 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1376 return; 1377 } 1378 } 1379 1380 /* 1381 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1382 */ 1383 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, 1384 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) 1385 { 1386 struct atio_from_isp *atio = &mcmd->orig_iocb.atio; 1387 struct ctio7_to_24xx *ctio; 1388 1389 ql_dbg(ql_dbg_tgt, ha, 0xe008, 1390 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n", 1391 ha, atio, resp_code); 1392 1393 /* Send marker if required */ 1394 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS) 1395 return; 1396 1397 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL); 1398 if (ctio == NULL) { 1399 ql_dbg(ql_dbg_tgt, ha, 0xe04c, 1400 "qla_target(%d): %s failed: unable to allocate " 1401 "request packet\n", ha->vp_idx, __func__); 1402 return; 1403 } 1404 1405 ctio->entry_type = CTIO_TYPE7; 1406 ctio->entry_count = 1; 1407 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1408 ctio->nport_handle = mcmd->sess->loop_id; 1409 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1410 ctio->vp_index = ha->vp_idx; 1411 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1412 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1413 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1414 ctio->exchange_addr = atio->u.isp24.exchange_addr; 1415 ctio->u.status1.flags = (atio->u.isp24.attr << 9) | 1416 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1417 CTIO7_FLAGS_SEND_STATUS); 1418 ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 1419 ctio->u.status1.scsi_status = 1420 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); 1421 ctio->u.status1.response_len = __constant_cpu_to_le16(8); 1422 ctio->u.status1.sense_data[0] = resp_code; 1423 1424 qla2x00_start_iocbs(ha, ha->req); 1425 } 1426 1427 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) 1428 { 1429 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1430 } 1431 EXPORT_SYMBOL(qlt_free_mcmd); 1432 1433 /* callback from target fabric module code */ 1434 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) 1435 { 1436 struct scsi_qla_host *vha = mcmd->sess->vha; 1437 struct qla_hw_data *ha = vha->hw; 1438 unsigned long flags; 1439 1440 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013, 1441 "TM response mcmd (%p) status %#x state %#x", 1442 mcmd, mcmd->fc_tm_rsp, mcmd->flags); 1443 1444 spin_lock_irqsave(&ha->hardware_lock, flags); 1445 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) 1446 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, 1447 0, 0, 0, 0, 0, 0); 1448 else { 1449 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK) 1450 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, 1451 mcmd->fc_tm_rsp, false); 1452 else 1453 qlt_24xx_send_task_mgmt_ctio(vha, mcmd, 1454 mcmd->fc_tm_rsp); 1455 } 1456 /* 1457 * Make the callback for ->free_mcmd() to queue_work() and invoke 1458 * target_put_sess_cmd() to drop cmd_kref to 1. The final 1459 * target_put_sess_cmd() call will be made from TFO->check_stop_free() 1460 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd 1461 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> 1462 * qlt_xmit_tm_rsp() returns here.. 1463 */ 1464 ha->tgt.tgt_ops->free_mcmd(mcmd); 1465 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1466 } 1467 EXPORT_SYMBOL(qlt_xmit_tm_rsp); 1468 1469 /* No locks */ 1470 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm) 1471 { 1472 struct qla_tgt_cmd *cmd = prm->cmd; 1473 1474 BUG_ON(cmd->sg_cnt == 0); 1475 1476 prm->sg = (struct scatterlist *)cmd->sg; 1477 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, 1478 cmd->sg_cnt, cmd->dma_data_direction); 1479 if (unlikely(prm->seg_cnt == 0)) 1480 goto out_err; 1481 1482 prm->cmd->sg_mapped = 1; 1483 1484 /* 1485 * If greater than four sg entries then we need to allocate 1486 * the continuation entries 1487 */ 1488 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) 1489 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - 1490 prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont); 1491 1492 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n", 1493 prm->seg_cnt, prm->req_cnt); 1494 return 0; 1495 1496 out_err: 1497 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d, 1498 "qla_target(%d): PCI mapping failed: sg_cnt=%d", 1499 0, prm->cmd->sg_cnt); 1500 return -1; 1501 } 1502 1503 static inline void qlt_unmap_sg(struct scsi_qla_host *vha, 1504 struct qla_tgt_cmd *cmd) 1505 { 1506 struct qla_hw_data *ha = vha->hw; 1507 1508 BUG_ON(!cmd->sg_mapped); 1509 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 1510 cmd->sg_mapped = 0; 1511 } 1512 1513 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, 1514 uint32_t req_cnt) 1515 { 1516 struct qla_hw_data *ha = vha->hw; 1517 device_reg_t __iomem *reg = ha->iobase; 1518 uint32_t cnt; 1519 1520 if (vha->req->cnt < (req_cnt + 2)) { 1521 cnt = (uint16_t)RD_REG_DWORD(®->isp24.req_q_out); 1522 1523 ql_dbg(ql_dbg_tgt, vha, 0xe00a, 1524 "Request ring circled: cnt=%d, vha->->ring_index=%d, " 1525 "vha->req->cnt=%d, req_cnt=%d\n", cnt, 1526 vha->req->ring_index, vha->req->cnt, req_cnt); 1527 if (vha->req->ring_index < cnt) 1528 vha->req->cnt = cnt - vha->req->ring_index; 1529 else 1530 vha->req->cnt = vha->req->length - 1531 (vha->req->ring_index - cnt); 1532 } 1533 1534 if (unlikely(vha->req->cnt < (req_cnt + 2))) { 1535 ql_dbg(ql_dbg_tgt, vha, 0xe00b, 1536 "qla_target(%d): There is no room in the " 1537 "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, " 1538 "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index, 1539 vha->req->cnt, req_cnt); 1540 return -EAGAIN; 1541 } 1542 vha->req->cnt -= req_cnt; 1543 1544 return 0; 1545 } 1546 1547 /* 1548 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1549 */ 1550 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha) 1551 { 1552 /* Adjust ring index. */ 1553 vha->req->ring_index++; 1554 if (vha->req->ring_index == vha->req->length) { 1555 vha->req->ring_index = 0; 1556 vha->req->ring_ptr = vha->req->ring; 1557 } else { 1558 vha->req->ring_ptr++; 1559 } 1560 return (cont_entry_t *)vha->req->ring_ptr; 1561 } 1562 1563 /* ha->hardware_lock supposed to be held on entry */ 1564 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha) 1565 { 1566 struct qla_hw_data *ha = vha->hw; 1567 uint32_t h; 1568 1569 h = ha->tgt.current_handle; 1570 /* always increment cmd handle */ 1571 do { 1572 ++h; 1573 if (h > MAX_OUTSTANDING_COMMANDS) 1574 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ 1575 if (h == ha->tgt.current_handle) { 1576 ql_dbg(ql_dbg_tgt, vha, 0xe04e, 1577 "qla_target(%d): Ran out of " 1578 "empty cmd slots in ha %p\n", vha->vp_idx, ha); 1579 h = QLA_TGT_NULL_HANDLE; 1580 break; 1581 } 1582 } while ((h == QLA_TGT_NULL_HANDLE) || 1583 (h == QLA_TGT_SKIP_HANDLE) || 1584 (ha->tgt.cmds[h-1] != NULL)); 1585 1586 if (h != QLA_TGT_NULL_HANDLE) 1587 ha->tgt.current_handle = h; 1588 1589 return h; 1590 } 1591 1592 /* ha->hardware_lock supposed to be held on entry */ 1593 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, 1594 struct scsi_qla_host *vha) 1595 { 1596 uint32_t h; 1597 struct ctio7_to_24xx *pkt; 1598 struct qla_hw_data *ha = vha->hw; 1599 struct atio_from_isp *atio = &prm->cmd->atio; 1600 1601 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr; 1602 prm->pkt = pkt; 1603 memset(pkt, 0, sizeof(*pkt)); 1604 1605 pkt->entry_type = CTIO_TYPE7; 1606 pkt->entry_count = (uint8_t)prm->req_cnt; 1607 pkt->vp_index = vha->vp_idx; 1608 1609 h = qlt_make_handle(vha); 1610 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 1611 /* 1612 * CTIO type 7 from the firmware doesn't provide a way to 1613 * know the initiator's LOOP ID, hence we can't find 1614 * the session and, so, the command. 1615 */ 1616 return -EAGAIN; 1617 } else 1618 ha->tgt.cmds[h-1] = prm->cmd; 1619 1620 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 1621 pkt->nport_handle = prm->cmd->loop_id; 1622 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1623 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1624 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1625 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1626 pkt->exchange_addr = atio->u.isp24.exchange_addr; 1627 pkt->u.status0.flags |= (atio->u.isp24.attr << 9); 1628 pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 1629 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); 1630 1631 ql_dbg(ql_dbg_tgt, vha, 0xe00c, 1632 "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n", 1633 vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT, 1634 le16_to_cpu(pkt->u.status0.ox_id)); 1635 return 0; 1636 } 1637 1638 /* 1639 * ha->hardware_lock supposed to be held on entry. We have already made sure 1640 * that there is sufficient amount of request entries to not drop it. 1641 */ 1642 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm, 1643 struct scsi_qla_host *vha) 1644 { 1645 int cnt; 1646 uint32_t *dword_ptr; 1647 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1648 1649 /* Build continuation packets */ 1650 while (prm->seg_cnt > 0) { 1651 cont_a64_entry_t *cont_pkt64 = 1652 (cont_a64_entry_t *)qlt_get_req_pkt(vha); 1653 1654 /* 1655 * Make sure that from cont_pkt64 none of 1656 * 64-bit specific fields used for 32-bit 1657 * addressing. Cast to (cont_entry_t *) for 1658 * that. 1659 */ 1660 1661 memset(cont_pkt64, 0, sizeof(*cont_pkt64)); 1662 1663 cont_pkt64->entry_count = 1; 1664 cont_pkt64->sys_define = 0; 1665 1666 if (enable_64bit_addressing) { 1667 cont_pkt64->entry_type = CONTINUE_A64_TYPE; 1668 dword_ptr = 1669 (uint32_t *)&cont_pkt64->dseg_0_address; 1670 } else { 1671 cont_pkt64->entry_type = CONTINUE_TYPE; 1672 dword_ptr = 1673 (uint32_t *)&((cont_entry_t *) 1674 cont_pkt64)->dseg_0_address; 1675 } 1676 1677 /* Load continuation entry data segments */ 1678 for (cnt = 0; 1679 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; 1680 cnt++, prm->seg_cnt--) { 1681 *dword_ptr++ = 1682 cpu_to_le32(pci_dma_lo32 1683 (sg_dma_address(prm->sg))); 1684 if (enable_64bit_addressing) { 1685 *dword_ptr++ = 1686 cpu_to_le32(pci_dma_hi32 1687 (sg_dma_address 1688 (prm->sg))); 1689 } 1690 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1691 1692 ql_dbg(ql_dbg_tgt, vha, 0xe00d, 1693 "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n", 1694 (long long unsigned int) 1695 pci_dma_hi32(sg_dma_address(prm->sg)), 1696 (long long unsigned int) 1697 pci_dma_lo32(sg_dma_address(prm->sg)), 1698 (int)sg_dma_len(prm->sg)); 1699 1700 prm->sg = sg_next(prm->sg); 1701 } 1702 } 1703 } 1704 1705 /* 1706 * ha->hardware_lock supposed to be held on entry. We have already made sure 1707 * that there is sufficient amount of request entries to not drop it. 1708 */ 1709 static void qlt_load_data_segments(struct qla_tgt_prm *prm, 1710 struct scsi_qla_host *vha) 1711 { 1712 int cnt; 1713 uint32_t *dword_ptr; 1714 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1715 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt; 1716 1717 ql_dbg(ql_dbg_tgt, vha, 0xe00e, 1718 "iocb->scsi_status=%x, iocb->flags=%x\n", 1719 le16_to_cpu(pkt24->u.status0.scsi_status), 1720 le16_to_cpu(pkt24->u.status0.flags)); 1721 1722 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen); 1723 1724 /* Setup packet address segment pointer */ 1725 dword_ptr = pkt24->u.status0.dseg_0_address; 1726 1727 /* Set total data segment count */ 1728 if (prm->seg_cnt) 1729 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt); 1730 1731 if (prm->seg_cnt == 0) { 1732 /* No data transfer */ 1733 *dword_ptr++ = 0; 1734 *dword_ptr = 0; 1735 return; 1736 } 1737 1738 /* If scatter gather */ 1739 ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments..."); 1740 1741 /* Load command entry data segments */ 1742 for (cnt = 0; 1743 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; 1744 cnt++, prm->seg_cnt--) { 1745 *dword_ptr++ = 1746 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); 1747 if (enable_64bit_addressing) { 1748 *dword_ptr++ = 1749 cpu_to_le32(pci_dma_hi32( 1750 sg_dma_address(prm->sg))); 1751 } 1752 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1753 1754 ql_dbg(ql_dbg_tgt, vha, 0xe010, 1755 "S/G Segment phys_addr=%llx:%llx, len=%d\n", 1756 (long long unsigned int)pci_dma_hi32(sg_dma_address( 1757 prm->sg)), 1758 (long long unsigned int)pci_dma_lo32(sg_dma_address( 1759 prm->sg)), 1760 (int)sg_dma_len(prm->sg)); 1761 1762 prm->sg = sg_next(prm->sg); 1763 } 1764 1765 qlt_load_cont_data_segments(prm, vha); 1766 } 1767 1768 static inline int qlt_has_data(struct qla_tgt_cmd *cmd) 1769 { 1770 return cmd->bufflen > 0; 1771 } 1772 1773 /* 1774 * Called without ha->hardware_lock held 1775 */ 1776 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, 1777 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status, 1778 uint32_t *full_req_cnt) 1779 { 1780 struct qla_tgt *tgt = cmd->tgt; 1781 struct scsi_qla_host *vha = tgt->vha; 1782 struct qla_hw_data *ha = vha->hw; 1783 struct se_cmd *se_cmd = &cmd->se_cmd; 1784 1785 if (unlikely(cmd->aborted)) { 1786 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, 1787 "qla_target(%d): terminating exchange " 1788 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd, 1789 se_cmd, cmd->tag); 1790 1791 cmd->state = QLA_TGT_STATE_ABORTED; 1792 1793 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0); 1794 1795 /* !! At this point cmd could be already freed !! */ 1796 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED; 1797 } 1798 1799 ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n", 1800 vha->vp_idx, cmd->tag); 1801 1802 prm->cmd = cmd; 1803 prm->tgt = tgt; 1804 prm->rq_result = scsi_status; 1805 prm->sense_buffer = &cmd->sense_buffer[0]; 1806 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; 1807 prm->sg = NULL; 1808 prm->seg_cnt = -1; 1809 prm->req_cnt = 1; 1810 prm->add_status_pkt = 0; 1811 1812 ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n", 1813 prm->rq_result, xmit_type); 1814 1815 /* Send marker if required */ 1816 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 1817 return -EFAULT; 1818 1819 ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx); 1820 1821 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { 1822 if (qlt_pci_map_calc_cnt(prm) != 0) 1823 return -EAGAIN; 1824 } 1825 1826 *full_req_cnt = prm->req_cnt; 1827 1828 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { 1829 prm->residual = se_cmd->residual_count; 1830 ql_dbg(ql_dbg_tgt, vha, 0xe014, 1831 "Residual underflow: %d (tag %d, " 1832 "op %x, bufflen %d, rq_result %x)\n", prm->residual, 1833 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1834 cmd->bufflen, prm->rq_result); 1835 prm->rq_result |= SS_RESIDUAL_UNDER; 1836 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 1837 prm->residual = se_cmd->residual_count; 1838 ql_dbg(ql_dbg_tgt, vha, 0xe015, 1839 "Residual overflow: %d (tag %d, " 1840 "op %x, bufflen %d, rq_result %x)\n", prm->residual, 1841 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1842 cmd->bufflen, prm->rq_result); 1843 prm->rq_result |= SS_RESIDUAL_OVER; 1844 } 1845 1846 if (xmit_type & QLA_TGT_XMIT_STATUS) { 1847 /* 1848 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be 1849 * ignored in *xmit_response() below 1850 */ 1851 if (qlt_has_data(cmd)) { 1852 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || 1853 (IS_FWI2_CAPABLE(ha) && 1854 (prm->rq_result != 0))) { 1855 prm->add_status_pkt = 1; 1856 (*full_req_cnt)++; 1857 } 1858 } 1859 } 1860 1861 ql_dbg(ql_dbg_tgt, vha, 0xe016, 1862 "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n", 1863 prm->req_cnt, *full_req_cnt, prm->add_status_pkt); 1864 1865 return 0; 1866 } 1867 1868 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, 1869 struct qla_tgt_cmd *cmd, int sending_sense) 1870 { 1871 if (ha->tgt.enable_class_2) 1872 return 0; 1873 1874 if (sending_sense) 1875 return cmd->conf_compl_supported; 1876 else 1877 return ha->tgt.enable_explicit_conf && 1878 cmd->conf_compl_supported; 1879 } 1880 1881 #ifdef CONFIG_QLA_TGT_DEBUG_SRR 1882 /* 1883 * Original taken from the XFS code 1884 */ 1885 static unsigned long qlt_srr_random(void) 1886 { 1887 static int Inited; 1888 static unsigned long RandomValue; 1889 static DEFINE_SPINLOCK(lock); 1890 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ 1891 register long rv; 1892 register long lo; 1893 register long hi; 1894 unsigned long flags; 1895 1896 spin_lock_irqsave(&lock, flags); 1897 if (!Inited) { 1898 RandomValue = jiffies; 1899 Inited = 1; 1900 } 1901 rv = RandomValue; 1902 hi = rv / 127773; 1903 lo = rv % 127773; 1904 rv = 16807 * lo - 2836 * hi; 1905 if (rv <= 0) 1906 rv += 2147483647; 1907 RandomValue = rv; 1908 spin_unlock_irqrestore(&lock, flags); 1909 return rv; 1910 } 1911 1912 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1913 { 1914 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ 1915 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) 1916 == 50) { 1917 *xmit_type &= ~QLA_TGT_XMIT_STATUS; 1918 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, 1919 "Dropping cmd %p (tag %d) status", cmd, cmd->tag); 1920 } 1921 #endif 1922 /* 1923 * It's currently not possible to simulate SRRs for FCP_WRITE without 1924 * a physical link layer failure, so don't even try here.. 1925 */ 1926 if (cmd->dma_data_direction != DMA_FROM_DEVICE) 1927 return; 1928 1929 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && 1930 ((qlt_srr_random() % 100) == 20)) { 1931 int i, leave = 0; 1932 unsigned int tot_len = 0; 1933 1934 while (leave == 0) 1935 leave = qlt_srr_random() % cmd->sg_cnt; 1936 1937 for (i = 0; i < leave; i++) 1938 tot_len += cmd->sg[i].length; 1939 1940 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, 1941 "Cutting cmd %p (tag %d) buffer" 1942 " tail to len %d, sg_cnt %d (cmd->bufflen %d," 1943 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave, 1944 cmd->bufflen, cmd->sg_cnt); 1945 1946 cmd->bufflen = tot_len; 1947 cmd->sg_cnt = leave; 1948 } 1949 1950 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { 1951 unsigned int offset = qlt_srr_random() % cmd->bufflen; 1952 1953 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, 1954 "Cutting cmd %p (tag %d) buffer head " 1955 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset, 1956 cmd->bufflen); 1957 if (offset == 0) 1958 *xmit_type &= ~QLA_TGT_XMIT_DATA; 1959 else if (qlt_set_data_offset(cmd, offset)) { 1960 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, 1961 "qlt_set_data_offset() failed (tag %d)", cmd->tag); 1962 } 1963 } 1964 } 1965 #else 1966 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1967 {} 1968 #endif 1969 1970 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, 1971 struct qla_tgt_prm *prm) 1972 { 1973 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, 1974 (uint32_t)sizeof(ctio->u.status1.sense_data)); 1975 ctio->u.status0.flags |= 1976 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); 1977 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { 1978 ctio->u.status0.flags |= __constant_cpu_to_le16( 1979 CTIO7_FLAGS_EXPLICIT_CONFORM | 1980 CTIO7_FLAGS_CONFORM_REQ); 1981 } 1982 ctio->u.status0.residual = cpu_to_le32(prm->residual); 1983 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); 1984 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { 1985 int i; 1986 1987 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { 1988 if (prm->cmd->se_cmd.scsi_status != 0) { 1989 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, 1990 "Skipping EXPLICIT_CONFORM and " 1991 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " 1992 "non GOOD status\n"); 1993 goto skip_explict_conf; 1994 } 1995 ctio->u.status1.flags |= __constant_cpu_to_le16( 1996 CTIO7_FLAGS_EXPLICIT_CONFORM | 1997 CTIO7_FLAGS_CONFORM_REQ); 1998 } 1999 skip_explict_conf: 2000 ctio->u.status1.flags &= 2001 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2002 ctio->u.status1.flags |= 2003 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2004 ctio->u.status1.scsi_status |= 2005 __constant_cpu_to_le16(SS_SENSE_LEN_VALID); 2006 ctio->u.status1.sense_length = 2007 cpu_to_le16(prm->sense_buffer_len); 2008 for (i = 0; i < prm->sense_buffer_len/4; i++) 2009 ((uint32_t *)ctio->u.status1.sense_data)[i] = 2010 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); 2011 #if 0 2012 if (unlikely((prm->sense_buffer_len % 4) != 0)) { 2013 static int q; 2014 if (q < 10) { 2015 ql_dbg(ql_dbg_tgt, vha, 0xe04f, 2016 "qla_target(%d): %d bytes of sense " 2017 "lost", prm->tgt->ha->vp_idx, 2018 prm->sense_buffer_len % 4); 2019 q++; 2020 } 2021 } 2022 #endif 2023 } else { 2024 ctio->u.status1.flags &= 2025 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2026 ctio->u.status1.flags |= 2027 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2028 ctio->u.status1.sense_length = 0; 2029 memset(ctio->u.status1.sense_data, 0, 2030 sizeof(ctio->u.status1.sense_data)); 2031 } 2032 2033 /* Sense with len > 24, is it possible ??? */ 2034 } 2035 2036 /* 2037 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * 2038 * QLA_TGT_XMIT_STATUS for >= 24xx silicon 2039 */ 2040 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, 2041 uint8_t scsi_status) 2042 { 2043 struct scsi_qla_host *vha = cmd->vha; 2044 struct qla_hw_data *ha = vha->hw; 2045 struct ctio7_to_24xx *pkt; 2046 struct qla_tgt_prm prm; 2047 uint32_t full_req_cnt = 0; 2048 unsigned long flags = 0; 2049 int res; 2050 2051 memset(&prm, 0, sizeof(prm)); 2052 qlt_check_srr_debug(cmd, &xmit_type); 2053 2054 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, 2055 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, " 2056 "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ? 2057 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction); 2058 2059 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, 2060 &full_req_cnt); 2061 if (unlikely(res != 0)) { 2062 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED) 2063 return 0; 2064 2065 return res; 2066 } 2067 2068 spin_lock_irqsave(&ha->hardware_lock, flags); 2069 2070 /* Does F/W have an IOCBs for this request */ 2071 res = qlt_check_reserve_free_req(vha, full_req_cnt); 2072 if (unlikely(res)) 2073 goto out_unmap_unlock; 2074 2075 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2076 if (unlikely(res != 0)) 2077 goto out_unmap_unlock; 2078 2079 2080 pkt = (struct ctio7_to_24xx *)prm.pkt; 2081 2082 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { 2083 pkt->u.status0.flags |= 2084 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN | 2085 CTIO7_FLAGS_STATUS_MODE_0); 2086 2087 qlt_load_data_segments(&prm, vha); 2088 2089 if (prm.add_status_pkt == 0) { 2090 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2091 pkt->u.status0.scsi_status = 2092 cpu_to_le16(prm.rq_result); 2093 pkt->u.status0.residual = 2094 cpu_to_le32(prm.residual); 2095 pkt->u.status0.flags |= __constant_cpu_to_le16( 2096 CTIO7_FLAGS_SEND_STATUS); 2097 if (qlt_need_explicit_conf(ha, cmd, 0)) { 2098 pkt->u.status0.flags |= 2099 __constant_cpu_to_le16( 2100 CTIO7_FLAGS_EXPLICIT_CONFORM | 2101 CTIO7_FLAGS_CONFORM_REQ); 2102 } 2103 } 2104 2105 } else { 2106 /* 2107 * We have already made sure that there is sufficient 2108 * amount of request entries to not drop HW lock in 2109 * req_pkt(). 2110 */ 2111 struct ctio7_to_24xx *ctio = 2112 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); 2113 2114 ql_dbg(ql_dbg_tgt, vha, 0xe019, 2115 "Building additional status packet\n"); 2116 2117 memcpy(ctio, pkt, sizeof(*ctio)); 2118 ctio->entry_count = 1; 2119 ctio->dseg_count = 0; 2120 ctio->u.status1.flags &= ~__constant_cpu_to_le16( 2121 CTIO7_FLAGS_DATA_IN); 2122 2123 /* Real finish is ctio_m1's finish */ 2124 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; 2125 pkt->u.status0.flags |= __constant_cpu_to_le16( 2126 CTIO7_FLAGS_DONT_RET_CTIO); 2127 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, 2128 &prm); 2129 pr_debug("Status CTIO7: %p\n", ctio); 2130 } 2131 } else 2132 qlt_24xx_init_ctio_to_isp(pkt, &prm); 2133 2134 2135 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ 2136 2137 ql_dbg(ql_dbg_tgt, vha, 0xe01a, 2138 "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n", 2139 pkt, scsi_status); 2140 2141 qla2x00_start_iocbs(vha, vha->req); 2142 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2143 2144 return 0; 2145 2146 out_unmap_unlock: 2147 if (cmd->sg_mapped) 2148 qlt_unmap_sg(vha, cmd); 2149 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2150 2151 return res; 2152 } 2153 EXPORT_SYMBOL(qlt_xmit_response); 2154 2155 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) 2156 { 2157 struct ctio7_to_24xx *pkt; 2158 struct scsi_qla_host *vha = cmd->vha; 2159 struct qla_hw_data *ha = vha->hw; 2160 struct qla_tgt *tgt = cmd->tgt; 2161 struct qla_tgt_prm prm; 2162 unsigned long flags; 2163 int res = 0; 2164 2165 memset(&prm, 0, sizeof(prm)); 2166 prm.cmd = cmd; 2167 prm.tgt = tgt; 2168 prm.sg = NULL; 2169 prm.req_cnt = 1; 2170 2171 /* Send marker if required */ 2172 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2173 return -EIO; 2174 2175 ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)", 2176 (int)vha->vp_idx); 2177 2178 /* Calculate number of entries and segments required */ 2179 if (qlt_pci_map_calc_cnt(&prm) != 0) 2180 return -EAGAIN; 2181 2182 spin_lock_irqsave(&ha->hardware_lock, flags); 2183 2184 /* Does F/W have an IOCBs for this request */ 2185 res = qlt_check_reserve_free_req(vha, prm.req_cnt); 2186 if (res != 0) 2187 goto out_unlock_free_unmap; 2188 2189 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2190 if (unlikely(res != 0)) 2191 goto out_unlock_free_unmap; 2192 pkt = (struct ctio7_to_24xx *)prm.pkt; 2193 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT | 2194 CTIO7_FLAGS_STATUS_MODE_0); 2195 qlt_load_data_segments(&prm, vha); 2196 2197 cmd->state = QLA_TGT_STATE_NEED_DATA; 2198 2199 qla2x00_start_iocbs(vha, vha->req); 2200 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2201 2202 return res; 2203 2204 out_unlock_free_unmap: 2205 if (cmd->sg_mapped) 2206 qlt_unmap_sg(vha, cmd); 2207 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2208 2209 return res; 2210 } 2211 EXPORT_SYMBOL(qlt_rdy_to_xfer); 2212 2213 /* If hardware_lock held on entry, might drop it, then reaquire */ 2214 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 2215 static int __qlt_send_term_exchange(struct scsi_qla_host *vha, 2216 struct qla_tgt_cmd *cmd, 2217 struct atio_from_isp *atio) 2218 { 2219 struct ctio7_to_24xx *ctio24; 2220 struct qla_hw_data *ha = vha->hw; 2221 request_t *pkt; 2222 int ret = 0; 2223 2224 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); 2225 2226 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 2227 if (pkt == NULL) { 2228 ql_dbg(ql_dbg_tgt, vha, 0xe050, 2229 "qla_target(%d): %s failed: unable to allocate " 2230 "request packet\n", vha->vp_idx, __func__); 2231 return -ENOMEM; 2232 } 2233 2234 if (cmd != NULL) { 2235 if (cmd->state < QLA_TGT_STATE_PROCESSED) { 2236 ql_dbg(ql_dbg_tgt, vha, 0xe051, 2237 "qla_target(%d): Terminating cmd %p with " 2238 "incorrect state %d\n", vha->vp_idx, cmd, 2239 cmd->state); 2240 } else 2241 ret = 1; 2242 } 2243 2244 pkt->entry_count = 1; 2245 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 2246 2247 ctio24 = (struct ctio7_to_24xx *)pkt; 2248 ctio24->entry_type = CTIO_TYPE7; 2249 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED; 2250 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 2251 ctio24->vp_index = vha->vp_idx; 2252 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2253 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2254 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2255 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 2256 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 2257 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 2258 CTIO7_FLAGS_TERMINATE); 2259 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 2260 2261 /* Most likely, it isn't needed */ 2262 ctio24->u.status1.residual = get_unaligned((uint32_t *) 2263 &atio->u.isp24.fcp_cmnd.add_cdb[ 2264 atio->u.isp24.fcp_cmnd.add_cdb_len]); 2265 if (ctio24->u.status1.residual != 0) 2266 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 2267 2268 qla2x00_start_iocbs(vha, vha->req); 2269 return ret; 2270 } 2271 2272 static void qlt_send_term_exchange(struct scsi_qla_host *vha, 2273 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked) 2274 { 2275 unsigned long flags; 2276 int rc; 2277 2278 if (qlt_issue_marker(vha, ha_locked) < 0) 2279 return; 2280 2281 if (ha_locked) { 2282 rc = __qlt_send_term_exchange(vha, cmd, atio); 2283 goto done; 2284 } 2285 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 2286 rc = __qlt_send_term_exchange(vha, cmd, atio); 2287 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 2288 done: 2289 if (rc == 1) { 2290 if (!ha_locked && !in_interrupt()) 2291 msleep(250); /* just in case */ 2292 2293 vha->hw->tgt.tgt_ops->free_cmd(cmd); 2294 } 2295 } 2296 2297 void qlt_free_cmd(struct qla_tgt_cmd *cmd) 2298 { 2299 BUG_ON(cmd->sg_mapped); 2300 2301 if (unlikely(cmd->free_sg)) 2302 kfree(cmd->sg); 2303 kmem_cache_free(qla_tgt_cmd_cachep, cmd); 2304 } 2305 EXPORT_SYMBOL(qlt_free_cmd); 2306 2307 /* ha->hardware_lock supposed to be held on entry */ 2308 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, 2309 struct qla_tgt_cmd *cmd, void *ctio) 2310 { 2311 struct qla_tgt_srr_ctio *sc; 2312 struct qla_hw_data *ha = vha->hw; 2313 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2314 struct qla_tgt_srr_imm *imm; 2315 2316 tgt->ctio_srr_id++; 2317 2318 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, 2319 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); 2320 2321 if (!ctio) { 2322 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, 2323 "qla_target(%d): SRR CTIO, but ctio is NULL\n", 2324 vha->vp_idx); 2325 return -EINVAL; 2326 } 2327 2328 sc = kzalloc(sizeof(*sc), GFP_ATOMIC); 2329 if (sc != NULL) { 2330 sc->cmd = cmd; 2331 /* IRQ is already OFF */ 2332 spin_lock(&tgt->srr_lock); 2333 sc->srr_id = tgt->ctio_srr_id; 2334 list_add_tail(&sc->srr_list_entry, 2335 &tgt->srr_ctio_list); 2336 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, 2337 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); 2338 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 2339 int found = 0; 2340 list_for_each_entry(imm, &tgt->srr_imm_list, 2341 srr_list_entry) { 2342 if (imm->srr_id == sc->srr_id) { 2343 found = 1; 2344 break; 2345 } 2346 } 2347 if (found) { 2348 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, 2349 "Scheduling srr work\n"); 2350 schedule_work(&tgt->srr_work); 2351 } else { 2352 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, 2353 "qla_target(%d): imm_srr_id " 2354 "== ctio_srr_id (%d), but there is no " 2355 "corresponding SRR IMM, deleting CTIO " 2356 "SRR %p\n", vha->vp_idx, 2357 tgt->ctio_srr_id, sc); 2358 list_del(&sc->srr_list_entry); 2359 spin_unlock(&tgt->srr_lock); 2360 2361 kfree(sc); 2362 return -EINVAL; 2363 } 2364 } 2365 spin_unlock(&tgt->srr_lock); 2366 } else { 2367 struct qla_tgt_srr_imm *ti; 2368 2369 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, 2370 "qla_target(%d): Unable to allocate SRR CTIO entry\n", 2371 vha->vp_idx); 2372 spin_lock(&tgt->srr_lock); 2373 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, 2374 srr_list_entry) { 2375 if (imm->srr_id == tgt->ctio_srr_id) { 2376 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, 2377 "IMM SRR %p deleted (id %d)\n", 2378 imm, imm->srr_id); 2379 list_del(&imm->srr_list_entry); 2380 qlt_reject_free_srr_imm(vha, imm, 1); 2381 } 2382 } 2383 spin_unlock(&tgt->srr_lock); 2384 2385 return -ENOMEM; 2386 } 2387 2388 return 0; 2389 } 2390 2391 /* 2392 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2393 */ 2394 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, 2395 struct qla_tgt_cmd *cmd, uint32_t status) 2396 { 2397 int term = 0; 2398 2399 if (ctio != NULL) { 2400 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; 2401 term = !(c->flags & 2402 __constant_cpu_to_le16(OF_TERM_EXCH)); 2403 } else 2404 term = 1; 2405 2406 if (term) 2407 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 2408 2409 return term; 2410 } 2411 2412 /* ha->hardware_lock supposed to be held on entry */ 2413 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, 2414 uint32_t handle) 2415 { 2416 struct qla_hw_data *ha = vha->hw; 2417 2418 handle--; 2419 if (ha->tgt.cmds[handle] != NULL) { 2420 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; 2421 ha->tgt.cmds[handle] = NULL; 2422 return cmd; 2423 } else 2424 return NULL; 2425 } 2426 2427 /* ha->hardware_lock supposed to be held on entry */ 2428 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, 2429 uint32_t handle, void *ctio) 2430 { 2431 struct qla_tgt_cmd *cmd = NULL; 2432 2433 /* Clear out internal marks */ 2434 handle &= ~(CTIO_COMPLETION_HANDLE_MARK | 2435 CTIO_INTERMEDIATE_HANDLE_MARK); 2436 2437 if (handle != QLA_TGT_NULL_HANDLE) { 2438 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) { 2439 ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s", 2440 "SKIP_HANDLE CTIO\n"); 2441 return NULL; 2442 } 2443 /* handle-1 is actually used */ 2444 if (unlikely(handle > MAX_OUTSTANDING_COMMANDS)) { 2445 ql_dbg(ql_dbg_tgt, vha, 0xe052, 2446 "qla_target(%d): Wrong handle %x received\n", 2447 vha->vp_idx, handle); 2448 return NULL; 2449 } 2450 cmd = qlt_get_cmd(vha, handle); 2451 if (unlikely(cmd == NULL)) { 2452 ql_dbg(ql_dbg_tgt, vha, 0xe053, 2453 "qla_target(%d): Suspicious: unable to " 2454 "find the command with handle %x\n", vha->vp_idx, 2455 handle); 2456 return NULL; 2457 } 2458 } else if (ctio != NULL) { 2459 /* We can't get loop ID from CTIO7 */ 2460 ql_dbg(ql_dbg_tgt, vha, 0xe054, 2461 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " 2462 "support NULL handles\n", vha->vp_idx); 2463 return NULL; 2464 } 2465 2466 return cmd; 2467 } 2468 2469 /* 2470 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2471 */ 2472 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, 2473 uint32_t status, void *ctio) 2474 { 2475 struct qla_hw_data *ha = vha->hw; 2476 struct se_cmd *se_cmd; 2477 struct target_core_fabric_ops *tfo; 2478 struct qla_tgt_cmd *cmd; 2479 2480 ql_dbg(ql_dbg_tgt, vha, 0xe01e, 2481 "qla_target(%d): handle(ctio %p status %#x) <- %08x\n", 2482 vha->vp_idx, ctio, status, handle); 2483 2484 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { 2485 /* That could happen only in case of an error/reset/abort */ 2486 if (status != CTIO_SUCCESS) { 2487 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, 2488 "Intermediate CTIO received" 2489 " (status %x)\n", status); 2490 } 2491 return; 2492 } 2493 2494 cmd = qlt_ctio_to_cmd(vha, handle, ctio); 2495 if (cmd == NULL) 2496 return; 2497 2498 se_cmd = &cmd->se_cmd; 2499 tfo = se_cmd->se_tfo; 2500 2501 if (cmd->sg_mapped) 2502 qlt_unmap_sg(vha, cmd); 2503 2504 if (unlikely(status != CTIO_SUCCESS)) { 2505 switch (status & 0xFFFF) { 2506 case CTIO_LIP_RESET: 2507 case CTIO_TARGET_RESET: 2508 case CTIO_ABORTED: 2509 case CTIO_TIMEOUT: 2510 case CTIO_INVALID_RX_ID: 2511 /* They are OK */ 2512 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, 2513 "qla_target(%d): CTIO with " 2514 "status %#x received, state %x, se_cmd %p, " 2515 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " 2516 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, 2517 status, cmd->state, se_cmd); 2518 break; 2519 2520 case CTIO_PORT_LOGGED_OUT: 2521 case CTIO_PORT_UNAVAILABLE: 2522 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, 2523 "qla_target(%d): CTIO with PORT LOGGED " 2524 "OUT (29) or PORT UNAVAILABLE (28) status %x " 2525 "received (state %x, se_cmd %p)\n", vha->vp_idx, 2526 status, cmd->state, se_cmd); 2527 break; 2528 2529 case CTIO_SRR_RECEIVED: 2530 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, 2531 "qla_target(%d): CTIO with SRR_RECEIVED" 2532 " status %x received (state %x, se_cmd %p)\n", 2533 vha->vp_idx, status, cmd->state, se_cmd); 2534 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) 2535 break; 2536 else 2537 return; 2538 2539 default: 2540 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, 2541 "qla_target(%d): CTIO with error status " 2542 "0x%x received (state %x, se_cmd %p\n", 2543 vha->vp_idx, status, cmd->state, se_cmd); 2544 break; 2545 } 2546 2547 if (cmd->state != QLA_TGT_STATE_NEED_DATA) 2548 if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) 2549 return; 2550 } 2551 2552 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 2553 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd); 2554 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 2555 int rx_status = 0; 2556 2557 cmd->state = QLA_TGT_STATE_DATA_IN; 2558 2559 if (unlikely(status != CTIO_SUCCESS)) 2560 rx_status = -EIO; 2561 else 2562 cmd->write_data_transferred = 1; 2563 2564 ql_dbg(ql_dbg_tgt, vha, 0xe020, 2565 "Data received, context %x, rx_status %d\n", 2566 0x0, rx_status); 2567 2568 ha->tgt.tgt_ops->handle_data(cmd); 2569 return; 2570 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 2571 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, 2572 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag); 2573 } else { 2574 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, 2575 "qla_target(%d): A command in state (%d) should " 2576 "not return a CTIO complete\n", vha->vp_idx, cmd->state); 2577 } 2578 2579 if (unlikely(status != CTIO_SUCCESS)) { 2580 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); 2581 dump_stack(); 2582 } 2583 2584 ha->tgt.tgt_ops->free_cmd(cmd); 2585 } 2586 2587 /* ha->hardware_lock supposed to be held on entry */ 2588 /* called via callback from qla2xxx */ 2589 void qlt_ctio_completion(struct scsi_qla_host *vha, uint32_t handle) 2590 { 2591 struct qla_hw_data *ha = vha->hw; 2592 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2593 2594 if (likely(tgt == NULL)) { 2595 ql_dbg(ql_dbg_tgt, vha, 0xe021, 2596 "CTIO, but target mode not enabled" 2597 " (ha %d %p handle %#x)", vha->vp_idx, ha, handle); 2598 return; 2599 } 2600 2601 tgt->irq_cmd_count++; 2602 qlt_do_ctio_completion(vha, handle, CTIO_SUCCESS, NULL); 2603 tgt->irq_cmd_count--; 2604 } 2605 2606 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, 2607 uint8_t task_codes) 2608 { 2609 int fcp_task_attr; 2610 2611 switch (task_codes) { 2612 case ATIO_SIMPLE_QUEUE: 2613 fcp_task_attr = MSG_SIMPLE_TAG; 2614 break; 2615 case ATIO_HEAD_OF_QUEUE: 2616 fcp_task_attr = MSG_HEAD_TAG; 2617 break; 2618 case ATIO_ORDERED_QUEUE: 2619 fcp_task_attr = MSG_ORDERED_TAG; 2620 break; 2621 case ATIO_ACA_QUEUE: 2622 fcp_task_attr = MSG_ACA_TAG; 2623 break; 2624 case ATIO_UNTAGGED: 2625 fcp_task_attr = MSG_SIMPLE_TAG; 2626 break; 2627 default: 2628 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, 2629 "qla_target: unknown task code %x, use ORDERED instead\n", 2630 task_codes); 2631 fcp_task_attr = MSG_ORDERED_TAG; 2632 break; 2633 } 2634 2635 return fcp_task_attr; 2636 } 2637 2638 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, 2639 uint8_t *); 2640 /* 2641 * Process context for I/O path into tcm_qla2xxx code 2642 */ 2643 static void qlt_do_work(struct work_struct *work) 2644 { 2645 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 2646 scsi_qla_host_t *vha = cmd->vha; 2647 struct qla_hw_data *ha = vha->hw; 2648 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2649 struct qla_tgt_sess *sess = NULL; 2650 struct atio_from_isp *atio = &cmd->atio; 2651 unsigned char *cdb; 2652 unsigned long flags; 2653 uint32_t data_length; 2654 int ret, fcp_task_attr, data_dir, bidi = 0; 2655 2656 if (tgt->tgt_stop) 2657 goto out_term; 2658 2659 spin_lock_irqsave(&ha->hardware_lock, flags); 2660 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 2661 atio->u.isp24.fcp_hdr.s_id); 2662 /* Do kref_get() before dropping qla_hw_data->hardware_lock. */ 2663 if (sess) 2664 kref_get(&sess->se_sess->sess_kref); 2665 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2666 2667 if (unlikely(!sess)) { 2668 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id; 2669 2670 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, 2671 "qla_target(%d): Unable to find wwn login" 2672 " (s_id %x:%x:%x), trying to create it manually\n", 2673 vha->vp_idx, s_id[0], s_id[1], s_id[2]); 2674 2675 if (atio->u.raw.entry_count > 1) { 2676 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, 2677 "Dropping multy entry cmd %p\n", cmd); 2678 goto out_term; 2679 } 2680 2681 mutex_lock(&ha->tgt.tgt_mutex); 2682 sess = qlt_make_local_sess(vha, s_id); 2683 /* sess has an extra creation ref. */ 2684 mutex_unlock(&ha->tgt.tgt_mutex); 2685 2686 if (!sess) 2687 goto out_term; 2688 } 2689 2690 cmd->sess = sess; 2691 cmd->loop_id = sess->loop_id; 2692 cmd->conf_compl_supported = sess->conf_compl_supported; 2693 2694 cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; 2695 cmd->tag = atio->u.isp24.exchange_addr; 2696 cmd->unpacked_lun = scsilun_to_int( 2697 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); 2698 2699 if (atio->u.isp24.fcp_cmnd.rddata && 2700 atio->u.isp24.fcp_cmnd.wrdata) { 2701 bidi = 1; 2702 data_dir = DMA_TO_DEVICE; 2703 } else if (atio->u.isp24.fcp_cmnd.rddata) 2704 data_dir = DMA_FROM_DEVICE; 2705 else if (atio->u.isp24.fcp_cmnd.wrdata) 2706 data_dir = DMA_TO_DEVICE; 2707 else 2708 data_dir = DMA_NONE; 2709 2710 fcp_task_attr = qlt_get_fcp_task_attr(vha, 2711 atio->u.isp24.fcp_cmnd.task_attr); 2712 data_length = be32_to_cpu(get_unaligned((uint32_t *) 2713 &atio->u.isp24.fcp_cmnd.add_cdb[ 2714 atio->u.isp24.fcp_cmnd.add_cdb_len])); 2715 2716 ql_dbg(ql_dbg_tgt, vha, 0xe022, 2717 "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n", 2718 cmd, cmd->unpacked_lun, cmd->tag); 2719 2720 ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, 2721 fcp_task_attr, data_dir, bidi); 2722 if (ret != 0) 2723 goto out_term; 2724 /* 2725 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( 2726 */ 2727 ha->tgt.tgt_ops->put_sess(sess); 2728 return; 2729 2730 out_term: 2731 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd); 2732 /* 2733 * cmd has not sent to target yet, so pass NULL as the second 2734 * argument to qlt_send_term_exchange() and free the memory here. 2735 */ 2736 spin_lock_irqsave(&ha->hardware_lock, flags); 2737 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1); 2738 kmem_cache_free(qla_tgt_cmd_cachep, cmd); 2739 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2740 if (sess) 2741 ha->tgt.tgt_ops->put_sess(sess); 2742 } 2743 2744 /* ha->hardware_lock supposed to be held on entry */ 2745 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, 2746 struct atio_from_isp *atio) 2747 { 2748 struct qla_hw_data *ha = vha->hw; 2749 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2750 struct qla_tgt_cmd *cmd; 2751 2752 if (unlikely(tgt->tgt_stop)) { 2753 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021, 2754 "New command while device %p is shutting down\n", tgt); 2755 return -EFAULT; 2756 } 2757 2758 cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC); 2759 if (!cmd) { 2760 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e, 2761 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); 2762 return -ENOMEM; 2763 } 2764 2765 INIT_LIST_HEAD(&cmd->cmd_list); 2766 2767 memcpy(&cmd->atio, atio, sizeof(*atio)); 2768 cmd->state = QLA_TGT_STATE_NEW; 2769 cmd->tgt = ha->tgt.qla_tgt; 2770 cmd->vha = vha; 2771 2772 INIT_WORK(&cmd->work, qlt_do_work); 2773 queue_work(qla_tgt_wq, &cmd->work); 2774 return 0; 2775 2776 } 2777 2778 /* ha->hardware_lock supposed to be held on entry */ 2779 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 2780 int fn, void *iocb, int flags) 2781 { 2782 struct scsi_qla_host *vha = sess->vha; 2783 struct qla_hw_data *ha = vha->hw; 2784 struct qla_tgt_mgmt_cmd *mcmd; 2785 int res; 2786 uint8_t tmr_func; 2787 2788 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 2789 if (!mcmd) { 2790 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, 2791 "qla_target(%d): Allocation of management " 2792 "command failed, some commands and their data could " 2793 "leak\n", vha->vp_idx); 2794 return -ENOMEM; 2795 } 2796 memset(mcmd, 0, sizeof(*mcmd)); 2797 mcmd->sess = sess; 2798 2799 if (iocb) { 2800 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 2801 sizeof(mcmd->orig_iocb.imm_ntfy)); 2802 } 2803 mcmd->tmr_func = fn; 2804 mcmd->flags = flags; 2805 2806 switch (fn) { 2807 case QLA_TGT_CLEAR_ACA: 2808 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, 2809 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); 2810 tmr_func = TMR_CLEAR_ACA; 2811 break; 2812 2813 case QLA_TGT_TARGET_RESET: 2814 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, 2815 "qla_target(%d): TARGET_RESET received\n", 2816 sess->vha->vp_idx); 2817 tmr_func = TMR_TARGET_WARM_RESET; 2818 break; 2819 2820 case QLA_TGT_LUN_RESET: 2821 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, 2822 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); 2823 tmr_func = TMR_LUN_RESET; 2824 break; 2825 2826 case QLA_TGT_CLEAR_TS: 2827 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, 2828 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); 2829 tmr_func = TMR_CLEAR_TASK_SET; 2830 break; 2831 2832 case QLA_TGT_ABORT_TS: 2833 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, 2834 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); 2835 tmr_func = TMR_ABORT_TASK_SET; 2836 break; 2837 #if 0 2838 case QLA_TGT_ABORT_ALL: 2839 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, 2840 "qla_target(%d): Doing ABORT_ALL_TASKS\n", 2841 sess->vha->vp_idx); 2842 tmr_func = 0; 2843 break; 2844 2845 case QLA_TGT_ABORT_ALL_SESS: 2846 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, 2847 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", 2848 sess->vha->vp_idx); 2849 tmr_func = 0; 2850 break; 2851 2852 case QLA_TGT_NEXUS_LOSS_SESS: 2853 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, 2854 "qla_target(%d): Doing NEXUS_LOSS_SESS\n", 2855 sess->vha->vp_idx); 2856 tmr_func = 0; 2857 break; 2858 2859 case QLA_TGT_NEXUS_LOSS: 2860 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, 2861 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); 2862 tmr_func = 0; 2863 break; 2864 #endif 2865 default: 2866 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, 2867 "qla_target(%d): Unknown task mgmt fn 0x%x\n", 2868 sess->vha->vp_idx, fn); 2869 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 2870 return -ENOSYS; 2871 } 2872 2873 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); 2874 if (res != 0) { 2875 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, 2876 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", 2877 sess->vha->vp_idx, res); 2878 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 2879 return -EFAULT; 2880 } 2881 2882 return 0; 2883 } 2884 2885 /* ha->hardware_lock supposed to be held on entry */ 2886 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) 2887 { 2888 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 2889 struct qla_hw_data *ha = vha->hw; 2890 struct qla_tgt *tgt; 2891 struct qla_tgt_sess *sess; 2892 uint32_t lun, unpacked_lun; 2893 int lun_size, fn; 2894 2895 tgt = ha->tgt.qla_tgt; 2896 2897 lun = a->u.isp24.fcp_cmnd.lun; 2898 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun); 2899 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 2900 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 2901 a->u.isp24.fcp_hdr.s_id); 2902 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 2903 2904 if (!sess) { 2905 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, 2906 "qla_target(%d): task mgmt fn 0x%x for " 2907 "non-existant session\n", vha->vp_idx, fn); 2908 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, 2909 sizeof(struct atio_from_isp)); 2910 } 2911 2912 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 2913 } 2914 2915 /* ha->hardware_lock supposed to be held on entry */ 2916 static int __qlt_abort_task(struct scsi_qla_host *vha, 2917 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) 2918 { 2919 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 2920 struct qla_hw_data *ha = vha->hw; 2921 struct qla_tgt_mgmt_cmd *mcmd; 2922 uint32_t lun, unpacked_lun; 2923 int rc; 2924 2925 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 2926 if (mcmd == NULL) { 2927 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, 2928 "qla_target(%d): %s: Allocation of ABORT cmd failed\n", 2929 vha->vp_idx, __func__); 2930 return -ENOMEM; 2931 } 2932 memset(mcmd, 0, sizeof(*mcmd)); 2933 2934 mcmd->sess = sess; 2935 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 2936 sizeof(mcmd->orig_iocb.imm_ntfy)); 2937 2938 lun = a->u.isp24.fcp_cmnd.lun; 2939 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 2940 2941 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, 2942 le16_to_cpu(iocb->u.isp2x.seq_id)); 2943 if (rc != 0) { 2944 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, 2945 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", 2946 vha->vp_idx, rc); 2947 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 2948 return -EFAULT; 2949 } 2950 2951 return 0; 2952 } 2953 2954 /* ha->hardware_lock supposed to be held on entry */ 2955 static int qlt_abort_task(struct scsi_qla_host *vha, 2956 struct imm_ntfy_from_isp *iocb) 2957 { 2958 struct qla_hw_data *ha = vha->hw; 2959 struct qla_tgt_sess *sess; 2960 int loop_id; 2961 2962 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); 2963 2964 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 2965 if (sess == NULL) { 2966 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, 2967 "qla_target(%d): task abort for unexisting " 2968 "session\n", vha->vp_idx); 2969 return qlt_sched_sess_work(ha->tgt.qla_tgt, 2970 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); 2971 } 2972 2973 return __qlt_abort_task(vha, iocb, sess); 2974 } 2975 2976 /* 2977 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2978 */ 2979 static int qlt_24xx_handle_els(struct scsi_qla_host *vha, 2980 struct imm_ntfy_from_isp *iocb) 2981 { 2982 struct qla_hw_data *ha = vha->hw; 2983 int res = 0; 2984 2985 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, 2986 "qla_target(%d): Port ID: 0x%02x:%02x:%02x" 2987 " ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0], 2988 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2], 2989 iocb->u.isp24.status_subcode); 2990 2991 switch (iocb->u.isp24.status_subcode) { 2992 case ELS_PLOGI: 2993 case ELS_FLOGI: 2994 case ELS_PRLI: 2995 case ELS_LOGO: 2996 case ELS_PRLO: 2997 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 2998 break; 2999 case ELS_PDISC: 3000 case ELS_ADISC: 3001 { 3002 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3003 if (tgt->link_reinit_iocb_pending) { 3004 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 3005 0, 0, 0, 0, 0, 0); 3006 tgt->link_reinit_iocb_pending = 0; 3007 } 3008 res = 1; /* send notify ack */ 3009 break; 3010 } 3011 3012 default: 3013 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, 3014 "qla_target(%d): Unsupported ELS command %x " 3015 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); 3016 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 3017 break; 3018 } 3019 3020 return res; 3021 } 3022 3023 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) 3024 { 3025 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; 3026 size_t first_offset = 0, rem_offset = offset, tmp = 0; 3027 int i, sg_srr_cnt, bufflen = 0; 3028 3029 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, 3030 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " 3031 "cmd->sg_cnt: %u, direction: %d\n", 3032 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 3033 3034 /* 3035 * FIXME: Reject non zero SRR relative offset until we can test 3036 * this code properly. 3037 */ 3038 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); 3039 return -1; 3040 3041 if (!cmd->sg || !cmd->sg_cnt) { 3042 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, 3043 "Missing cmd->sg or zero cmd->sg_cnt in" 3044 " qla_tgt_set_data_offset\n"); 3045 return -EINVAL; 3046 } 3047 /* 3048 * Walk the current cmd->sg list until we locate the new sg_srr_start 3049 */ 3050 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { 3051 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, 3052 "sg[%d]: %p page: %p, length: %d, offset: %d\n", 3053 i, sg, sg_page(sg), sg->length, sg->offset); 3054 3055 if ((sg->length + tmp) > offset) { 3056 first_offset = rem_offset; 3057 sg_srr_start = sg; 3058 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, 3059 "Found matching sg[%d], using %p as sg_srr_start, " 3060 "and using first_offset: %zu\n", i, sg, 3061 first_offset); 3062 break; 3063 } 3064 tmp += sg->length; 3065 rem_offset -= sg->length; 3066 } 3067 3068 if (!sg_srr_start) { 3069 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, 3070 "Unable to locate sg_srr_start for offset: %u\n", offset); 3071 return -EINVAL; 3072 } 3073 sg_srr_cnt = (cmd->sg_cnt - i); 3074 3075 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); 3076 if (!sg_srr) { 3077 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, 3078 "Unable to allocate sgp\n"); 3079 return -ENOMEM; 3080 } 3081 sg_init_table(sg_srr, sg_srr_cnt); 3082 sgp = &sg_srr[0]; 3083 /* 3084 * Walk the remaining list for sg_srr_start, mapping to the newly 3085 * allocated sg_srr taking first_offset into account. 3086 */ 3087 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { 3088 if (first_offset) { 3089 sg_set_page(sgp, sg_page(sg), 3090 (sg->length - first_offset), first_offset); 3091 first_offset = 0; 3092 } else { 3093 sg_set_page(sgp, sg_page(sg), sg->length, 0); 3094 } 3095 bufflen += sgp->length; 3096 3097 sgp = sg_next(sgp); 3098 if (!sgp) 3099 break; 3100 } 3101 3102 cmd->sg = sg_srr; 3103 cmd->sg_cnt = sg_srr_cnt; 3104 cmd->bufflen = bufflen; 3105 cmd->offset += offset; 3106 cmd->free_sg = 1; 3107 3108 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); 3109 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", 3110 cmd->sg_cnt); 3111 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", 3112 cmd->bufflen); 3113 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", 3114 cmd->offset); 3115 3116 if (cmd->sg_cnt < 0) 3117 BUG(); 3118 3119 if (cmd->bufflen < 0) 3120 BUG(); 3121 3122 return 0; 3123 } 3124 3125 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd, 3126 uint32_t srr_rel_offs, int *xmit_type) 3127 { 3128 int res = 0, rel_offs; 3129 3130 rel_offs = srr_rel_offs - cmd->offset; 3131 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d", 3132 srr_rel_offs, rel_offs); 3133 3134 *xmit_type = QLA_TGT_XMIT_ALL; 3135 3136 if (rel_offs < 0) { 3137 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062, 3138 "qla_target(%d): SRR rel_offs (%d) < 0", 3139 cmd->vha->vp_idx, rel_offs); 3140 res = -1; 3141 } else if (rel_offs == cmd->bufflen) 3142 *xmit_type = QLA_TGT_XMIT_STATUS; 3143 else if (rel_offs > 0) 3144 res = qlt_set_data_offset(cmd, rel_offs); 3145 3146 return res; 3147 } 3148 3149 /* No locks, thread context */ 3150 static void qlt_handle_srr(struct scsi_qla_host *vha, 3151 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm) 3152 { 3153 struct imm_ntfy_from_isp *ntfy = 3154 (struct imm_ntfy_from_isp *)&imm->imm_ntfy; 3155 struct qla_hw_data *ha = vha->hw; 3156 struct qla_tgt_cmd *cmd = sctio->cmd; 3157 struct se_cmd *se_cmd = &cmd->se_cmd; 3158 unsigned long flags; 3159 int xmit_type = 0, resp = 0; 3160 uint32_t offset; 3161 uint16_t srr_ui; 3162 3163 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); 3164 srr_ui = ntfy->u.isp24.srr_ui; 3165 3166 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n", 3167 cmd, srr_ui); 3168 3169 switch (srr_ui) { 3170 case SRR_IU_STATUS: 3171 spin_lock_irqsave(&ha->hardware_lock, flags); 3172 qlt_send_notify_ack(vha, ntfy, 3173 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3174 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3175 xmit_type = QLA_TGT_XMIT_STATUS; 3176 resp = 1; 3177 break; 3178 case SRR_IU_DATA_IN: 3179 if (!cmd->sg || !cmd->sg_cnt) { 3180 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063, 3181 "Unable to process SRR_IU_DATA_IN due to" 3182 " missing cmd->sg, state: %d\n", cmd->state); 3183 dump_stack(); 3184 goto out_reject; 3185 } 3186 if (se_cmd->scsi_status != 0) { 3187 ql_dbg(ql_dbg_tgt, vha, 0xe02a, 3188 "Rejecting SRR_IU_DATA_IN with non GOOD " 3189 "scsi_status\n"); 3190 goto out_reject; 3191 } 3192 cmd->bufflen = se_cmd->data_length; 3193 3194 if (qlt_has_data(cmd)) { 3195 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3196 goto out_reject; 3197 spin_lock_irqsave(&ha->hardware_lock, flags); 3198 qlt_send_notify_ack(vha, ntfy, 3199 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3200 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3201 resp = 1; 3202 } else { 3203 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064, 3204 "qla_target(%d): SRR for in data for cmd " 3205 "without them (tag %d, SCSI status %d), " 3206 "reject", vha->vp_idx, cmd->tag, 3207 cmd->se_cmd.scsi_status); 3208 goto out_reject; 3209 } 3210 break; 3211 case SRR_IU_DATA_OUT: 3212 if (!cmd->sg || !cmd->sg_cnt) { 3213 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, 3214 "Unable to process SRR_IU_DATA_OUT due to" 3215 " missing cmd->sg\n"); 3216 dump_stack(); 3217 goto out_reject; 3218 } 3219 if (se_cmd->scsi_status != 0) { 3220 ql_dbg(ql_dbg_tgt, vha, 0xe02b, 3221 "Rejecting SRR_IU_DATA_OUT" 3222 " with non GOOD scsi_status\n"); 3223 goto out_reject; 3224 } 3225 cmd->bufflen = se_cmd->data_length; 3226 3227 if (qlt_has_data(cmd)) { 3228 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3229 goto out_reject; 3230 spin_lock_irqsave(&ha->hardware_lock, flags); 3231 qlt_send_notify_ack(vha, ntfy, 3232 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3233 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3234 if (xmit_type & QLA_TGT_XMIT_DATA) 3235 qlt_rdy_to_xfer(cmd); 3236 } else { 3237 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, 3238 "qla_target(%d): SRR for out data for cmd " 3239 "without them (tag %d, SCSI status %d), " 3240 "reject", vha->vp_idx, cmd->tag, 3241 cmd->se_cmd.scsi_status); 3242 goto out_reject; 3243 } 3244 break; 3245 default: 3246 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, 3247 "qla_target(%d): Unknown srr_ui value %x", 3248 vha->vp_idx, srr_ui); 3249 goto out_reject; 3250 } 3251 3252 /* Transmit response in case of status and data-in cases */ 3253 if (resp) 3254 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 3255 3256 return; 3257 3258 out_reject: 3259 spin_lock_irqsave(&ha->hardware_lock, flags); 3260 qlt_send_notify_ack(vha, ntfy, 0, 0, 0, 3261 NOTIFY_ACK_SRR_FLAGS_REJECT, 3262 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3263 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3264 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3265 cmd->state = QLA_TGT_STATE_DATA_IN; 3266 dump_stack(); 3267 } else 3268 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 3269 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3270 } 3271 3272 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, 3273 struct qla_tgt_srr_imm *imm, int ha_locked) 3274 { 3275 struct qla_hw_data *ha = vha->hw; 3276 unsigned long flags = 0; 3277 3278 if (!ha_locked) 3279 spin_lock_irqsave(&ha->hardware_lock, flags); 3280 3281 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, 3282 NOTIFY_ACK_SRR_FLAGS_REJECT, 3283 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3284 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3285 3286 if (!ha_locked) 3287 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3288 3289 kfree(imm); 3290 } 3291 3292 static void qlt_handle_srr_work(struct work_struct *work) 3293 { 3294 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); 3295 struct scsi_qla_host *vha = tgt->vha; 3296 struct qla_tgt_srr_ctio *sctio; 3297 unsigned long flags; 3298 3299 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", 3300 tgt); 3301 3302 restart: 3303 spin_lock_irqsave(&tgt->srr_lock, flags); 3304 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { 3305 struct qla_tgt_srr_imm *imm, *i, *ti; 3306 struct qla_tgt_cmd *cmd; 3307 struct se_cmd *se_cmd; 3308 3309 imm = NULL; 3310 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, 3311 srr_list_entry) { 3312 if (i->srr_id == sctio->srr_id) { 3313 list_del(&i->srr_list_entry); 3314 if (imm) { 3315 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, 3316 "qla_target(%d): There must be " 3317 "only one IMM SRR per CTIO SRR " 3318 "(IMM SRR %p, id %d, CTIO %p\n", 3319 vha->vp_idx, i, i->srr_id, sctio); 3320 qlt_reject_free_srr_imm(tgt->vha, i, 0); 3321 } else 3322 imm = i; 3323 } 3324 } 3325 3326 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, 3327 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, 3328 sctio->srr_id); 3329 3330 if (imm == NULL) { 3331 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, 3332 "Not found matching IMM for SRR CTIO (id %d)\n", 3333 sctio->srr_id); 3334 continue; 3335 } else 3336 list_del(&sctio->srr_list_entry); 3337 3338 spin_unlock_irqrestore(&tgt->srr_lock, flags); 3339 3340 cmd = sctio->cmd; 3341 /* 3342 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow 3343 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() 3344 * logic.. 3345 */ 3346 cmd->offset = 0; 3347 if (cmd->free_sg) { 3348 kfree(cmd->sg); 3349 cmd->sg = NULL; 3350 cmd->free_sg = 0; 3351 } 3352 se_cmd = &cmd->se_cmd; 3353 3354 cmd->sg_cnt = se_cmd->t_data_nents; 3355 cmd->sg = se_cmd->t_data_sg; 3356 3357 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, 3358 "SRR cmd %p (se_cmd %p, tag %d, op %x), " 3359 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag, 3360 se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset); 3361 3362 qlt_handle_srr(vha, sctio, imm); 3363 3364 kfree(imm); 3365 kfree(sctio); 3366 goto restart; 3367 } 3368 spin_unlock_irqrestore(&tgt->srr_lock, flags); 3369 } 3370 3371 /* ha->hardware_lock supposed to be held on entry */ 3372 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, 3373 struct imm_ntfy_from_isp *iocb) 3374 { 3375 struct qla_tgt_srr_imm *imm; 3376 struct qla_hw_data *ha = vha->hw; 3377 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3378 struct qla_tgt_srr_ctio *sctio; 3379 3380 tgt->imm_srr_id++; 3381 3382 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n", 3383 vha->vp_idx); 3384 3385 imm = kzalloc(sizeof(*imm), GFP_ATOMIC); 3386 if (imm != NULL) { 3387 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); 3388 3389 /* IRQ is already OFF */ 3390 spin_lock(&tgt->srr_lock); 3391 imm->srr_id = tgt->imm_srr_id; 3392 list_add_tail(&imm->srr_list_entry, 3393 &tgt->srr_imm_list); 3394 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, 3395 "IMM NTFY SRR %p added (id %d, ui %x)\n", 3396 imm, imm->srr_id, iocb->u.isp24.srr_ui); 3397 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 3398 int found = 0; 3399 list_for_each_entry(sctio, &tgt->srr_ctio_list, 3400 srr_list_entry) { 3401 if (sctio->srr_id == imm->srr_id) { 3402 found = 1; 3403 break; 3404 } 3405 } 3406 if (found) { 3407 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", 3408 "Scheduling srr work\n"); 3409 schedule_work(&tgt->srr_work); 3410 } else { 3411 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, 3412 "qla_target(%d): imm_srr_id " 3413 "== ctio_srr_id (%d), but there is no " 3414 "corresponding SRR CTIO, deleting IMM " 3415 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, 3416 imm); 3417 list_del(&imm->srr_list_entry); 3418 3419 kfree(imm); 3420 3421 spin_unlock(&tgt->srr_lock); 3422 goto out_reject; 3423 } 3424 } 3425 spin_unlock(&tgt->srr_lock); 3426 } else { 3427 struct qla_tgt_srr_ctio *ts; 3428 3429 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, 3430 "qla_target(%d): Unable to allocate SRR IMM " 3431 "entry, SRR request will be rejected\n", vha->vp_idx); 3432 3433 /* IRQ is already OFF */ 3434 spin_lock(&tgt->srr_lock); 3435 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, 3436 srr_list_entry) { 3437 if (sctio->srr_id == tgt->imm_srr_id) { 3438 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, 3439 "CTIO SRR %p deleted (id %d)\n", 3440 sctio, sctio->srr_id); 3441 list_del(&sctio->srr_list_entry); 3442 qlt_send_term_exchange(vha, sctio->cmd, 3443 &sctio->cmd->atio, 1); 3444 kfree(sctio); 3445 } 3446 } 3447 spin_unlock(&tgt->srr_lock); 3448 goto out_reject; 3449 } 3450 3451 return; 3452 3453 out_reject: 3454 qlt_send_notify_ack(vha, iocb, 0, 0, 0, 3455 NOTIFY_ACK_SRR_FLAGS_REJECT, 3456 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3457 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3458 } 3459 3460 /* 3461 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3462 */ 3463 static void qlt_handle_imm_notify(struct scsi_qla_host *vha, 3464 struct imm_ntfy_from_isp *iocb) 3465 { 3466 struct qla_hw_data *ha = vha->hw; 3467 uint32_t add_flags = 0; 3468 int send_notify_ack = 1; 3469 uint16_t status; 3470 3471 status = le16_to_cpu(iocb->u.isp2x.status); 3472 switch (status) { 3473 case IMM_NTFY_LIP_RESET: 3474 { 3475 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, 3476 "qla_target(%d): LIP reset (loop %#x), subcode %x\n", 3477 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), 3478 iocb->u.isp24.status_subcode); 3479 3480 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 3481 send_notify_ack = 0; 3482 break; 3483 } 3484 3485 case IMM_NTFY_LIP_LINK_REINIT: 3486 { 3487 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3488 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, 3489 "qla_target(%d): LINK REINIT (loop %#x, " 3490 "subcode %x)\n", vha->vp_idx, 3491 le16_to_cpu(iocb->u.isp24.nport_handle), 3492 iocb->u.isp24.status_subcode); 3493 if (tgt->link_reinit_iocb_pending) { 3494 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 3495 0, 0, 0, 0, 0, 0); 3496 } 3497 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); 3498 tgt->link_reinit_iocb_pending = 1; 3499 /* 3500 * QLogic requires to wait after LINK REINIT for possible 3501 * PDISC or ADISC ELS commands 3502 */ 3503 send_notify_ack = 0; 3504 break; 3505 } 3506 3507 case IMM_NTFY_PORT_LOGOUT: 3508 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, 3509 "qla_target(%d): Port logout (loop " 3510 "%#x, subcode %x)\n", vha->vp_idx, 3511 le16_to_cpu(iocb->u.isp24.nport_handle), 3512 iocb->u.isp24.status_subcode); 3513 3514 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) 3515 send_notify_ack = 0; 3516 /* The sessions will be cleared in the callback, if needed */ 3517 break; 3518 3519 case IMM_NTFY_GLBL_TPRLO: 3520 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, 3521 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); 3522 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 3523 send_notify_ack = 0; 3524 /* The sessions will be cleared in the callback, if needed */ 3525 break; 3526 3527 case IMM_NTFY_PORT_CONFIG: 3528 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, 3529 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, 3530 status); 3531 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 3532 send_notify_ack = 0; 3533 /* The sessions will be cleared in the callback, if needed */ 3534 break; 3535 3536 case IMM_NTFY_GLBL_LOGO: 3537 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, 3538 "qla_target(%d): Link failure detected\n", 3539 vha->vp_idx); 3540 /* I_T nexus loss */ 3541 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 3542 send_notify_ack = 0; 3543 break; 3544 3545 case IMM_NTFY_IOCB_OVERFLOW: 3546 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, 3547 "qla_target(%d): Cannot provide requested " 3548 "capability (IOCB overflowed the immediate notify " 3549 "resource count)\n", vha->vp_idx); 3550 break; 3551 3552 case IMM_NTFY_ABORT_TASK: 3553 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, 3554 "qla_target(%d): Abort Task (S %08x I %#x -> " 3555 "L %#x)\n", vha->vp_idx, 3556 le16_to_cpu(iocb->u.isp2x.seq_id), 3557 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), 3558 le16_to_cpu(iocb->u.isp2x.lun)); 3559 if (qlt_abort_task(vha, iocb) == 0) 3560 send_notify_ack = 0; 3561 break; 3562 3563 case IMM_NTFY_RESOURCE: 3564 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, 3565 "qla_target(%d): Out of resources, host %ld\n", 3566 vha->vp_idx, vha->host_no); 3567 break; 3568 3569 case IMM_NTFY_MSG_RX: 3570 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, 3571 "qla_target(%d): Immediate notify task %x\n", 3572 vha->vp_idx, iocb->u.isp2x.task_flags); 3573 if (qlt_handle_task_mgmt(vha, iocb) == 0) 3574 send_notify_ack = 0; 3575 break; 3576 3577 case IMM_NTFY_ELS: 3578 if (qlt_24xx_handle_els(vha, iocb) == 0) 3579 send_notify_ack = 0; 3580 break; 3581 3582 case IMM_NTFY_SRR: 3583 qlt_prepare_srr_imm(vha, iocb); 3584 send_notify_ack = 0; 3585 break; 3586 3587 default: 3588 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, 3589 "qla_target(%d): Received unknown immediate " 3590 "notify status %x\n", vha->vp_idx, status); 3591 break; 3592 } 3593 3594 if (send_notify_ack) 3595 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); 3596 } 3597 3598 /* 3599 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3600 * This function sends busy to ISP 2xxx or 24xx. 3601 */ 3602 static void qlt_send_busy(struct scsi_qla_host *vha, 3603 struct atio_from_isp *atio, uint16_t status) 3604 { 3605 struct ctio7_to_24xx *ctio24; 3606 struct qla_hw_data *ha = vha->hw; 3607 request_t *pkt; 3608 struct qla_tgt_sess *sess = NULL; 3609 3610 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 3611 atio->u.isp24.fcp_hdr.s_id); 3612 if (!sess) { 3613 qlt_send_term_exchange(vha, NULL, atio, 1); 3614 return; 3615 } 3616 /* Sending marker isn't necessary, since we called from ISR */ 3617 3618 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 3619 if (!pkt) { 3620 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e, 3621 "qla_target(%d): %s failed: unable to allocate " 3622 "request packet", vha->vp_idx, __func__); 3623 return; 3624 } 3625 3626 pkt->entry_count = 1; 3627 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 3628 3629 ctio24 = (struct ctio7_to_24xx *)pkt; 3630 ctio24->entry_type = CTIO_TYPE7; 3631 ctio24->nport_handle = sess->loop_id; 3632 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 3633 ctio24->vp_index = vha->vp_idx; 3634 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 3635 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 3636 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 3637 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 3638 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 3639 __constant_cpu_to_le16( 3640 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | 3641 CTIO7_FLAGS_DONT_RET_CTIO); 3642 /* 3643 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, 3644 * if the explicit conformation is used. 3645 */ 3646 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 3647 ctio24->u.status1.scsi_status = cpu_to_le16(status); 3648 ctio24->u.status1.residual = get_unaligned((uint32_t *) 3649 &atio->u.isp24.fcp_cmnd.add_cdb[ 3650 atio->u.isp24.fcp_cmnd.add_cdb_len]); 3651 if (ctio24->u.status1.residual != 0) 3652 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 3653 3654 qla2x00_start_iocbs(vha, vha->req); 3655 } 3656 3657 /* ha->hardware_lock supposed to be held on entry */ 3658 /* called via callback from qla2xxx */ 3659 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, 3660 struct atio_from_isp *atio) 3661 { 3662 struct qla_hw_data *ha = vha->hw; 3663 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3664 int rc; 3665 3666 if (unlikely(tgt == NULL)) { 3667 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039, 3668 "ATIO pkt, but no tgt (ha %p)", ha); 3669 return; 3670 } 3671 ql_dbg(ql_dbg_tgt, vha, 0xe02c, 3672 "qla_target(%d): ATIO pkt %p: type %02x count %02x", 3673 vha->vp_idx, atio, atio->u.raw.entry_type, 3674 atio->u.raw.entry_count); 3675 /* 3676 * In tgt_stop mode we also should allow all requests to pass. 3677 * Otherwise, some commands can stuck. 3678 */ 3679 3680 tgt->irq_cmd_count++; 3681 3682 switch (atio->u.raw.entry_type) { 3683 case ATIO_TYPE7: 3684 ql_dbg(ql_dbg_tgt, vha, 0xe02d, 3685 "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, " 3686 "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n", 3687 vha->vp_idx, atio->u.isp24.fcp_cmnd.lun, 3688 atio->u.isp24.fcp_cmnd.rddata, 3689 atio->u.isp24.fcp_cmnd.wrdata, 3690 atio->u.isp24.fcp_cmnd.add_cdb_len, 3691 be32_to_cpu(get_unaligned((uint32_t *) 3692 &atio->u.isp24.fcp_cmnd.add_cdb[ 3693 atio->u.isp24.fcp_cmnd.add_cdb_len])), 3694 atio->u.isp24.fcp_hdr.s_id[0], 3695 atio->u.isp24.fcp_hdr.s_id[1], 3696 atio->u.isp24.fcp_hdr.s_id[2]); 3697 3698 if (unlikely(atio->u.isp24.exchange_addr == 3699 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { 3700 ql_dbg(ql_dbg_tgt, vha, 0xe058, 3701 "qla_target(%d): ATIO_TYPE7 " 3702 "received with UNKNOWN exchange address, " 3703 "sending QUEUE_FULL\n", vha->vp_idx); 3704 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); 3705 break; 3706 } 3707 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) 3708 rc = qlt_handle_cmd_for_atio(vha, atio); 3709 else 3710 rc = qlt_handle_task_mgmt(vha, atio); 3711 if (unlikely(rc != 0)) { 3712 if (rc == -ESRCH) { 3713 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 3714 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 3715 #else 3716 qlt_send_term_exchange(vha, NULL, atio, 1); 3717 #endif 3718 } else { 3719 if (tgt->tgt_stop) { 3720 ql_dbg(ql_dbg_tgt, vha, 0xe059, 3721 "qla_target: Unable to send " 3722 "command to target for req, " 3723 "ignoring.\n"); 3724 } else { 3725 ql_dbg(ql_dbg_tgt, vha, 0xe05a, 3726 "qla_target(%d): Unable to send " 3727 "command to target, sending BUSY " 3728 "status.\n", vha->vp_idx); 3729 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 3730 } 3731 } 3732 } 3733 break; 3734 3735 case IMMED_NOTIFY_TYPE: 3736 { 3737 if (unlikely(atio->u.isp2x.entry_status != 0)) { 3738 ql_dbg(ql_dbg_tgt, vha, 0xe05b, 3739 "qla_target(%d): Received ATIO packet %x " 3740 "with error status %x\n", vha->vp_idx, 3741 atio->u.raw.entry_type, 3742 atio->u.isp2x.entry_status); 3743 break; 3744 } 3745 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); 3746 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); 3747 break; 3748 } 3749 3750 default: 3751 ql_dbg(ql_dbg_tgt, vha, 0xe05c, 3752 "qla_target(%d): Received unknown ATIO atio " 3753 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 3754 break; 3755 } 3756 3757 tgt->irq_cmd_count--; 3758 } 3759 3760 /* ha->hardware_lock supposed to be held on entry */ 3761 /* called via callback from qla2xxx */ 3762 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) 3763 { 3764 struct qla_hw_data *ha = vha->hw; 3765 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3766 3767 if (unlikely(tgt == NULL)) { 3768 ql_dbg(ql_dbg_tgt, vha, 0xe05d, 3769 "qla_target(%d): Response pkt %x received, but no " 3770 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); 3771 return; 3772 } 3773 3774 ql_dbg(ql_dbg_tgt, vha, 0xe02f, 3775 "qla_target(%d): response pkt %p: T %02x C %02x S %02x " 3776 "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type, 3777 pkt->entry_count, pkt->entry_status, pkt->handle); 3778 3779 /* 3780 * In tgt_stop mode we also should allow all requests to pass. 3781 * Otherwise, some commands can stuck. 3782 */ 3783 3784 tgt->irq_cmd_count++; 3785 3786 switch (pkt->entry_type) { 3787 case CTIO_TYPE7: 3788 { 3789 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 3790 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n", 3791 vha->vp_idx); 3792 qlt_do_ctio_completion(vha, entry->handle, 3793 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 3794 entry); 3795 break; 3796 } 3797 3798 case ACCEPT_TGT_IO_TYPE: 3799 { 3800 struct atio_from_isp *atio = (struct atio_from_isp *)pkt; 3801 int rc; 3802 ql_dbg(ql_dbg_tgt, vha, 0xe031, 3803 "ACCEPT_TGT_IO instance %d status %04x " 3804 "lun %04x read/write %d data_length %04x " 3805 "target_id %02x rx_id %04x\n ", vha->vp_idx, 3806 le16_to_cpu(atio->u.isp2x.status), 3807 le16_to_cpu(atio->u.isp2x.lun), 3808 atio->u.isp2x.execution_codes, 3809 le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha, 3810 atio), atio->u.isp2x.rx_id); 3811 if (atio->u.isp2x.status != 3812 __constant_cpu_to_le16(ATIO_CDB_VALID)) { 3813 ql_dbg(ql_dbg_tgt, vha, 0xe05e, 3814 "qla_target(%d): ATIO with error " 3815 "status %x received\n", vha->vp_idx, 3816 le16_to_cpu(atio->u.isp2x.status)); 3817 break; 3818 } 3819 ql_dbg(ql_dbg_tgt, vha, 0xe032, 3820 "FCP CDB: 0x%02x, sizeof(cdb): %lu", 3821 atio->u.isp2x.cdb[0], (unsigned long 3822 int)sizeof(atio->u.isp2x.cdb)); 3823 3824 rc = qlt_handle_cmd_for_atio(vha, atio); 3825 if (unlikely(rc != 0)) { 3826 if (rc == -ESRCH) { 3827 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 3828 qlt_send_busy(vha, atio, 0); 3829 #else 3830 qlt_send_term_exchange(vha, NULL, atio, 1); 3831 #endif 3832 } else { 3833 if (tgt->tgt_stop) { 3834 ql_dbg(ql_dbg_tgt, vha, 0xe05f, 3835 "qla_target: Unable to send " 3836 "command to target, sending TERM " 3837 "EXCHANGE for rsp\n"); 3838 qlt_send_term_exchange(vha, NULL, 3839 atio, 1); 3840 } else { 3841 ql_dbg(ql_dbg_tgt, vha, 0xe060, 3842 "qla_target(%d): Unable to send " 3843 "command to target, sending BUSY " 3844 "status\n", vha->vp_idx); 3845 qlt_send_busy(vha, atio, 0); 3846 } 3847 } 3848 } 3849 } 3850 break; 3851 3852 case CONTINUE_TGT_IO_TYPE: 3853 { 3854 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 3855 ql_dbg(ql_dbg_tgt, vha, 0xe033, 3856 "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx); 3857 qlt_do_ctio_completion(vha, entry->handle, 3858 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 3859 entry); 3860 break; 3861 } 3862 3863 case CTIO_A64_TYPE: 3864 { 3865 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 3866 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n", 3867 vha->vp_idx); 3868 qlt_do_ctio_completion(vha, entry->handle, 3869 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 3870 entry); 3871 break; 3872 } 3873 3874 case IMMED_NOTIFY_TYPE: 3875 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); 3876 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); 3877 break; 3878 3879 case NOTIFY_ACK_TYPE: 3880 if (tgt->notify_ack_expected > 0) { 3881 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 3882 ql_dbg(ql_dbg_tgt, vha, 0xe036, 3883 "NOTIFY_ACK seq %08x status %x\n", 3884 le16_to_cpu(entry->u.isp2x.seq_id), 3885 le16_to_cpu(entry->u.isp2x.status)); 3886 tgt->notify_ack_expected--; 3887 if (entry->u.isp2x.status != 3888 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) { 3889 ql_dbg(ql_dbg_tgt, vha, 0xe061, 3890 "qla_target(%d): NOTIFY_ACK " 3891 "failed %x\n", vha->vp_idx, 3892 le16_to_cpu(entry->u.isp2x.status)); 3893 } 3894 } else { 3895 ql_dbg(ql_dbg_tgt, vha, 0xe062, 3896 "qla_target(%d): Unexpected NOTIFY_ACK received\n", 3897 vha->vp_idx); 3898 } 3899 break; 3900 3901 case ABTS_RECV_24XX: 3902 ql_dbg(ql_dbg_tgt, vha, 0xe037, 3903 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); 3904 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); 3905 break; 3906 3907 case ABTS_RESP_24XX: 3908 if (tgt->abts_resp_expected > 0) { 3909 struct abts_resp_from_24xx_fw *entry = 3910 (struct abts_resp_from_24xx_fw *)pkt; 3911 ql_dbg(ql_dbg_tgt, vha, 0xe038, 3912 "ABTS_RESP_24XX: compl_status %x\n", 3913 entry->compl_status); 3914 tgt->abts_resp_expected--; 3915 if (le16_to_cpu(entry->compl_status) != 3916 ABTS_RESP_COMPL_SUCCESS) { 3917 if ((entry->error_subcode1 == 0x1E) && 3918 (entry->error_subcode2 == 0)) { 3919 /* 3920 * We've got a race here: aborted 3921 * exchange not terminated, i.e. 3922 * response for the aborted command was 3923 * sent between the abort request was 3924 * received and processed. 3925 * Unfortunately, the firmware has a 3926 * silly requirement that all aborted 3927 * exchanges must be explicitely 3928 * terminated, otherwise it refuses to 3929 * send responses for the abort 3930 * requests. So, we have to 3931 * (re)terminate the exchange and retry 3932 * the abort response. 3933 */ 3934 qlt_24xx_retry_term_exchange(vha, 3935 entry); 3936 } else 3937 ql_dbg(ql_dbg_tgt, vha, 0xe063, 3938 "qla_target(%d): ABTS_RESP_24XX " 3939 "failed %x (subcode %x:%x)", 3940 vha->vp_idx, entry->compl_status, 3941 entry->error_subcode1, 3942 entry->error_subcode2); 3943 } 3944 } else { 3945 ql_dbg(ql_dbg_tgt, vha, 0xe064, 3946 "qla_target(%d): Unexpected ABTS_RESP_24XX " 3947 "received\n", vha->vp_idx); 3948 } 3949 break; 3950 3951 default: 3952 ql_dbg(ql_dbg_tgt, vha, 0xe065, 3953 "qla_target(%d): Received unknown response pkt " 3954 "type %x\n", vha->vp_idx, pkt->entry_type); 3955 break; 3956 } 3957 3958 tgt->irq_cmd_count--; 3959 } 3960 3961 /* 3962 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3963 */ 3964 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, 3965 uint16_t *mailbox) 3966 { 3967 struct qla_hw_data *ha = vha->hw; 3968 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3969 int login_code; 3970 3971 ql_dbg(ql_dbg_tgt, vha, 0xe039, 3972 "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n", 3973 vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done, 3974 ha->operating_mode, ha->current_topology); 3975 3976 if (!ha->tgt.tgt_ops) 3977 return; 3978 3979 if (unlikely(tgt == NULL)) { 3980 ql_dbg(ql_dbg_tgt, vha, 0xe03a, 3981 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); 3982 return; 3983 } 3984 3985 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && 3986 IS_QLA2100(ha)) 3987 return; 3988 /* 3989 * In tgt_stop mode we also should allow all requests to pass. 3990 * Otherwise, some commands can stuck. 3991 */ 3992 3993 tgt->irq_cmd_count++; 3994 3995 switch (code) { 3996 case MBA_RESET: /* Reset */ 3997 case MBA_SYSTEM_ERR: /* System Error */ 3998 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ 3999 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ 4000 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, 4001 "qla_target(%d): System error async event %#x " 4002 "occurred", vha->vp_idx, code); 4003 break; 4004 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ 4005 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 4006 break; 4007 4008 case MBA_LOOP_UP: 4009 { 4010 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, 4011 "qla_target(%d): Async LOOP_UP occurred " 4012 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 4013 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4014 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4015 if (tgt->link_reinit_iocb_pending) { 4016 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 4017 0, 0, 0, 0, 0, 0); 4018 tgt->link_reinit_iocb_pending = 0; 4019 } 4020 break; 4021 } 4022 4023 case MBA_LIP_OCCURRED: 4024 case MBA_LOOP_DOWN: 4025 case MBA_LIP_RESET: 4026 case MBA_RSCN_UPDATE: 4027 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, 4028 "qla_target(%d): Async event %#x occurred " 4029 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, 4030 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4031 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4032 break; 4033 4034 case MBA_PORT_UPDATE: 4035 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, 4036 "qla_target(%d): Port update async event %#x " 4037 "occurred: updating the ports database (m[0]=%x, m[1]=%x, " 4038 "m[2]=%x, m[3]=%x)", vha->vp_idx, code, 4039 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4040 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4041 4042 login_code = le16_to_cpu(mailbox[2]); 4043 if (login_code == 0x4) 4044 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, 4045 "Async MB 2: Got PLOGI Complete\n"); 4046 else if (login_code == 0x7) 4047 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, 4048 "Async MB 2: Port Logged Out\n"); 4049 break; 4050 4051 default: 4052 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040, 4053 "qla_target(%d): Async event %#x occurred: " 4054 "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 4055 code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4056 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4057 break; 4058 } 4059 4060 tgt->irq_cmd_count--; 4061 } 4062 4063 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, 4064 uint16_t loop_id) 4065 { 4066 fc_port_t *fcport; 4067 int rc; 4068 4069 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 4070 if (!fcport) { 4071 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, 4072 "qla_target(%d): Allocation of tmp FC port failed", 4073 vha->vp_idx); 4074 return NULL; 4075 } 4076 4077 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id); 4078 4079 fcport->loop_id = loop_id; 4080 4081 rc = qla2x00_get_port_database(vha, fcport, 0); 4082 if (rc != QLA_SUCCESS) { 4083 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, 4084 "qla_target(%d): Failed to retrieve fcport " 4085 "information -- get_port_database() returned %x " 4086 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 4087 kfree(fcport); 4088 return NULL; 4089 } 4090 4091 return fcport; 4092 } 4093 4094 /* Must be called under tgt_mutex */ 4095 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, 4096 uint8_t *s_id) 4097 { 4098 struct qla_hw_data *ha = vha->hw; 4099 struct qla_tgt_sess *sess = NULL; 4100 fc_port_t *fcport = NULL; 4101 int rc, global_resets; 4102 uint16_t loop_id = 0; 4103 4104 retry: 4105 global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count); 4106 4107 rc = qla24xx_get_loop_id(vha, s_id, &loop_id); 4108 if (rc != 0) { 4109 if ((s_id[0] == 0xFF) && 4110 (s_id[1] == 0xFC)) { 4111 /* 4112 * This is Domain Controller, so it should be 4113 * OK to drop SCSI commands from it. 4114 */ 4115 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, 4116 "Unable to find initiator with S_ID %x:%x:%x", 4117 s_id[0], s_id[1], s_id[2]); 4118 } else 4119 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071, 4120 "qla_target(%d): Unable to find " 4121 "initiator with S_ID %x:%x:%x", 4122 vha->vp_idx, s_id[0], s_id[1], 4123 s_id[2]); 4124 return NULL; 4125 } 4126 4127 fcport = qlt_get_port_database(vha, loop_id); 4128 if (!fcport) 4129 return NULL; 4130 4131 if (global_resets != 4132 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) { 4133 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, 4134 "qla_target(%d): global reset during session discovery " 4135 "(counter was %d, new %d), retrying", vha->vp_idx, 4136 global_resets, 4137 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)); 4138 goto retry; 4139 } 4140 4141 sess = qlt_create_sess(vha, fcport, true); 4142 4143 kfree(fcport); 4144 return sess; 4145 } 4146 4147 static void qlt_abort_work(struct qla_tgt *tgt, 4148 struct qla_tgt_sess_work_param *prm) 4149 { 4150 struct scsi_qla_host *vha = tgt->vha; 4151 struct qla_hw_data *ha = vha->hw; 4152 struct qla_tgt_sess *sess = NULL; 4153 unsigned long flags; 4154 uint32_t be_s_id; 4155 uint8_t s_id[3]; 4156 int rc; 4157 4158 spin_lock_irqsave(&ha->hardware_lock, flags); 4159 4160 if (tgt->tgt_stop) 4161 goto out_term; 4162 4163 s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; 4164 s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; 4165 s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; 4166 4167 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 4168 (unsigned char *)&be_s_id); 4169 if (!sess) { 4170 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4171 4172 mutex_lock(&ha->tgt.tgt_mutex); 4173 sess = qlt_make_local_sess(vha, s_id); 4174 /* sess has got an extra creation ref */ 4175 mutex_unlock(&ha->tgt.tgt_mutex); 4176 4177 spin_lock_irqsave(&ha->hardware_lock, flags); 4178 if (!sess) 4179 goto out_term; 4180 } else { 4181 kref_get(&sess->se_sess->sess_kref); 4182 } 4183 4184 if (tgt->tgt_stop) 4185 goto out_term; 4186 4187 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); 4188 if (rc != 0) 4189 goto out_term; 4190 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4191 4192 ha->tgt.tgt_ops->put_sess(sess); 4193 return; 4194 4195 out_term: 4196 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); 4197 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4198 if (sess) 4199 ha->tgt.tgt_ops->put_sess(sess); 4200 } 4201 4202 static void qlt_tmr_work(struct qla_tgt *tgt, 4203 struct qla_tgt_sess_work_param *prm) 4204 { 4205 struct atio_from_isp *a = &prm->tm_iocb2; 4206 struct scsi_qla_host *vha = tgt->vha; 4207 struct qla_hw_data *ha = vha->hw; 4208 struct qla_tgt_sess *sess = NULL; 4209 unsigned long flags; 4210 uint8_t *s_id = NULL; /* to hide compiler warnings */ 4211 int rc; 4212 uint32_t lun, unpacked_lun; 4213 int lun_size, fn; 4214 void *iocb; 4215 4216 spin_lock_irqsave(&ha->hardware_lock, flags); 4217 4218 if (tgt->tgt_stop) 4219 goto out_term; 4220 4221 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; 4222 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 4223 if (!sess) { 4224 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4225 4226 mutex_lock(&ha->tgt.tgt_mutex); 4227 sess = qlt_make_local_sess(vha, s_id); 4228 /* sess has got an extra creation ref */ 4229 mutex_unlock(&ha->tgt.tgt_mutex); 4230 4231 spin_lock_irqsave(&ha->hardware_lock, flags); 4232 if (!sess) 4233 goto out_term; 4234 } else { 4235 kref_get(&sess->se_sess->sess_kref); 4236 } 4237 4238 iocb = a; 4239 lun = a->u.isp24.fcp_cmnd.lun; 4240 lun_size = sizeof(lun); 4241 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 4242 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 4243 4244 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 4245 if (rc != 0) 4246 goto out_term; 4247 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4248 4249 ha->tgt.tgt_ops->put_sess(sess); 4250 return; 4251 4252 out_term: 4253 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1); 4254 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4255 if (sess) 4256 ha->tgt.tgt_ops->put_sess(sess); 4257 } 4258 4259 static void qlt_sess_work_fn(struct work_struct *work) 4260 { 4261 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); 4262 struct scsi_qla_host *vha = tgt->vha; 4263 unsigned long flags; 4264 4265 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); 4266 4267 spin_lock_irqsave(&tgt->sess_work_lock, flags); 4268 while (!list_empty(&tgt->sess_works_list)) { 4269 struct qla_tgt_sess_work_param *prm = list_entry( 4270 tgt->sess_works_list.next, typeof(*prm), 4271 sess_works_list_entry); 4272 4273 /* 4274 * This work can be scheduled on several CPUs at time, so we 4275 * must delete the entry to eliminate double processing 4276 */ 4277 list_del(&prm->sess_works_list_entry); 4278 4279 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 4280 4281 switch (prm->type) { 4282 case QLA_TGT_SESS_WORK_ABORT: 4283 qlt_abort_work(tgt, prm); 4284 break; 4285 case QLA_TGT_SESS_WORK_TM: 4286 qlt_tmr_work(tgt, prm); 4287 break; 4288 default: 4289 BUG_ON(1); 4290 break; 4291 } 4292 4293 spin_lock_irqsave(&tgt->sess_work_lock, flags); 4294 4295 kfree(prm); 4296 } 4297 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 4298 } 4299 4300 /* Must be called under tgt_host_action_mutex */ 4301 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) 4302 { 4303 struct qla_tgt *tgt; 4304 4305 if (!QLA_TGT_MODE_ENABLED()) 4306 return 0; 4307 4308 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, 4309 "Registering target for host %ld(%p)", base_vha->host_no, ha); 4310 4311 BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL)); 4312 4313 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); 4314 if (!tgt) { 4315 ql_dbg(ql_dbg_tgt, base_vha, 0xe066, 4316 "Unable to allocate struct qla_tgt\n"); 4317 return -ENOMEM; 4318 } 4319 4320 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) 4321 base_vha->host->hostt->supported_mode |= MODE_TARGET; 4322 4323 tgt->ha = ha; 4324 tgt->vha = base_vha; 4325 init_waitqueue_head(&tgt->waitQ); 4326 INIT_LIST_HEAD(&tgt->sess_list); 4327 INIT_LIST_HEAD(&tgt->del_sess_list); 4328 INIT_DELAYED_WORK(&tgt->sess_del_work, 4329 (void (*)(struct work_struct *))qlt_del_sess_work_fn); 4330 spin_lock_init(&tgt->sess_work_lock); 4331 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); 4332 INIT_LIST_HEAD(&tgt->sess_works_list); 4333 spin_lock_init(&tgt->srr_lock); 4334 INIT_LIST_HEAD(&tgt->srr_ctio_list); 4335 INIT_LIST_HEAD(&tgt->srr_imm_list); 4336 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); 4337 atomic_set(&tgt->tgt_global_resets_count, 0); 4338 4339 ha->tgt.qla_tgt = tgt; 4340 4341 ql_dbg(ql_dbg_tgt, base_vha, 0xe067, 4342 "qla_target(%d): using 64 Bit PCI addressing", 4343 base_vha->vp_idx); 4344 tgt->tgt_enable_64bit_addr = 1; 4345 /* 3 is reserved */ 4346 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); 4347 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; 4348 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; 4349 4350 mutex_lock(&qla_tgt_mutex); 4351 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); 4352 mutex_unlock(&qla_tgt_mutex); 4353 4354 return 0; 4355 } 4356 4357 /* Must be called under tgt_host_action_mutex */ 4358 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) 4359 { 4360 if (!ha->tgt.qla_tgt) 4361 return 0; 4362 4363 mutex_lock(&qla_tgt_mutex); 4364 list_del(&ha->tgt.qla_tgt->tgt_list_entry); 4365 mutex_unlock(&qla_tgt_mutex); 4366 4367 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", 4368 vha->host_no, ha); 4369 qlt_release(ha->tgt.qla_tgt); 4370 4371 return 0; 4372 } 4373 4374 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, 4375 unsigned char *b) 4376 { 4377 int i; 4378 4379 pr_debug("qla2xxx HW vha->node_name: "); 4380 for (i = 0; i < WWN_SIZE; i++) 4381 pr_debug("%02x ", vha->node_name[i]); 4382 pr_debug("\n"); 4383 pr_debug("qla2xxx HW vha->port_name: "); 4384 for (i = 0; i < WWN_SIZE; i++) 4385 pr_debug("%02x ", vha->port_name[i]); 4386 pr_debug("\n"); 4387 4388 pr_debug("qla2xxx passed configfs WWPN: "); 4389 put_unaligned_be64(wwpn, b); 4390 for (i = 0; i < WWN_SIZE; i++) 4391 pr_debug("%02x ", b[i]); 4392 pr_debug("\n"); 4393 } 4394 4395 /** 4396 * qla_tgt_lport_register - register lport with external module 4397 * 4398 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops 4399 * @wwpn: Passwd FC target WWPN 4400 * @callback: lport initialization callback for tcm_qla2xxx code 4401 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data 4402 */ 4403 int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn, 4404 int (*callback)(struct scsi_qla_host *), void *target_lport_ptr) 4405 { 4406 struct qla_tgt *tgt; 4407 struct scsi_qla_host *vha; 4408 struct qla_hw_data *ha; 4409 struct Scsi_Host *host; 4410 unsigned long flags; 4411 int rc; 4412 u8 b[WWN_SIZE]; 4413 4414 mutex_lock(&qla_tgt_mutex); 4415 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { 4416 vha = tgt->vha; 4417 ha = vha->hw; 4418 4419 host = vha->host; 4420 if (!host) 4421 continue; 4422 4423 if (ha->tgt.tgt_ops != NULL) 4424 continue; 4425 4426 if (!(host->hostt->supported_mode & MODE_TARGET)) 4427 continue; 4428 4429 spin_lock_irqsave(&ha->hardware_lock, flags); 4430 if (host->active_mode & MODE_TARGET) { 4431 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", 4432 host->host_no); 4433 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4434 continue; 4435 } 4436 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4437 4438 if (!scsi_host_get(host)) { 4439 ql_dbg(ql_dbg_tgt, vha, 0xe068, 4440 "Unable to scsi_host_get() for" 4441 " qla2xxx scsi_host\n"); 4442 continue; 4443 } 4444 qlt_lport_dump(vha, wwpn, b); 4445 4446 if (memcmp(vha->port_name, b, WWN_SIZE)) { 4447 scsi_host_put(host); 4448 continue; 4449 } 4450 /* 4451 * Setup passed parameters ahead of invoking callback 4452 */ 4453 ha->tgt.tgt_ops = qla_tgt_ops; 4454 ha->tgt.target_lport_ptr = target_lport_ptr; 4455 rc = (*callback)(vha); 4456 if (rc != 0) { 4457 ha->tgt.tgt_ops = NULL; 4458 ha->tgt.target_lport_ptr = NULL; 4459 } 4460 mutex_unlock(&qla_tgt_mutex); 4461 return rc; 4462 } 4463 mutex_unlock(&qla_tgt_mutex); 4464 4465 return -ENODEV; 4466 } 4467 EXPORT_SYMBOL(qlt_lport_register); 4468 4469 /** 4470 * qla_tgt_lport_deregister - Degister lport 4471 * 4472 * @vha: Registered scsi_qla_host pointer 4473 */ 4474 void qlt_lport_deregister(struct scsi_qla_host *vha) 4475 { 4476 struct qla_hw_data *ha = vha->hw; 4477 struct Scsi_Host *sh = vha->host; 4478 /* 4479 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data 4480 */ 4481 ha->tgt.target_lport_ptr = NULL; 4482 ha->tgt.tgt_ops = NULL; 4483 /* 4484 * Release the Scsi_Host reference for the underlying qla2xxx host 4485 */ 4486 scsi_host_put(sh); 4487 } 4488 EXPORT_SYMBOL(qlt_lport_deregister); 4489 4490 /* Must be called under HW lock */ 4491 void qlt_set_mode(struct scsi_qla_host *vha) 4492 { 4493 struct qla_hw_data *ha = vha->hw; 4494 4495 switch (ql2x_ini_mode) { 4496 case QLA2XXX_INI_MODE_DISABLED: 4497 case QLA2XXX_INI_MODE_EXCLUSIVE: 4498 vha->host->active_mode = MODE_TARGET; 4499 break; 4500 case QLA2XXX_INI_MODE_ENABLED: 4501 vha->host->active_mode |= MODE_TARGET; 4502 break; 4503 default: 4504 break; 4505 } 4506 4507 if (ha->tgt.ini_mode_force_reverse) 4508 qla_reverse_ini_mode(vha); 4509 } 4510 4511 /* Must be called under HW lock */ 4512 void qlt_clear_mode(struct scsi_qla_host *vha) 4513 { 4514 struct qla_hw_data *ha = vha->hw; 4515 4516 switch (ql2x_ini_mode) { 4517 case QLA2XXX_INI_MODE_DISABLED: 4518 vha->host->active_mode = MODE_UNKNOWN; 4519 break; 4520 case QLA2XXX_INI_MODE_EXCLUSIVE: 4521 vha->host->active_mode = MODE_INITIATOR; 4522 break; 4523 case QLA2XXX_INI_MODE_ENABLED: 4524 vha->host->active_mode &= ~MODE_TARGET; 4525 break; 4526 default: 4527 break; 4528 } 4529 4530 if (ha->tgt.ini_mode_force_reverse) 4531 qla_reverse_ini_mode(vha); 4532 } 4533 4534 /* 4535 * qla_tgt_enable_vha - NO LOCK HELD 4536 * 4537 * host_reset, bring up w/ Target Mode Enabled 4538 */ 4539 void 4540 qlt_enable_vha(struct scsi_qla_host *vha) 4541 { 4542 struct qla_hw_data *ha = vha->hw; 4543 struct qla_tgt *tgt = ha->tgt.qla_tgt; 4544 unsigned long flags; 4545 4546 if (!tgt) { 4547 ql_dbg(ql_dbg_tgt, vha, 0xe069, 4548 "Unable to locate qla_tgt pointer from" 4549 " struct qla_hw_data\n"); 4550 dump_stack(); 4551 return; 4552 } 4553 4554 spin_lock_irqsave(&ha->hardware_lock, flags); 4555 tgt->tgt_stopped = 0; 4556 qlt_set_mode(vha); 4557 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4558 4559 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 4560 qla2xxx_wake_dpc(vha); 4561 qla2x00_wait_for_hba_online(vha); 4562 } 4563 EXPORT_SYMBOL(qlt_enable_vha); 4564 4565 /* 4566 * qla_tgt_disable_vha - NO LOCK HELD 4567 * 4568 * Disable Target Mode and reset the adapter 4569 */ 4570 void 4571 qlt_disable_vha(struct scsi_qla_host *vha) 4572 { 4573 struct qla_hw_data *ha = vha->hw; 4574 struct qla_tgt *tgt = ha->tgt.qla_tgt; 4575 unsigned long flags; 4576 4577 if (!tgt) { 4578 ql_dbg(ql_dbg_tgt, vha, 0xe06a, 4579 "Unable to locate qla_tgt pointer from" 4580 " struct qla_hw_data\n"); 4581 dump_stack(); 4582 return; 4583 } 4584 4585 spin_lock_irqsave(&ha->hardware_lock, flags); 4586 qlt_clear_mode(vha); 4587 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4588 4589 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 4590 qla2xxx_wake_dpc(vha); 4591 qla2x00_wait_for_hba_online(vha); 4592 } 4593 4594 /* 4595 * Called from qla_init.c:qla24xx_vport_create() contex to setup 4596 * the target mode specific struct scsi_qla_host and struct qla_hw_data 4597 * members. 4598 */ 4599 void 4600 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) 4601 { 4602 if (!qla_tgt_mode_enabled(vha)) 4603 return; 4604 4605 mutex_init(&ha->tgt.tgt_mutex); 4606 mutex_init(&ha->tgt.tgt_host_action_mutex); 4607 4608 qlt_clear_mode(vha); 4609 4610 /* 4611 * NOTE: Currently the value is kept the same for <24xx and 4612 * >=24xx ISPs. If it is necessary to change it, 4613 * the check should be added for specific ISPs, 4614 * assigning the value appropriately. 4615 */ 4616 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; 4617 } 4618 4619 void 4620 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) 4621 { 4622 /* 4623 * FC-4 Feature bit 0 indicates target functionality to the name server. 4624 */ 4625 if (qla_tgt_mode_enabled(vha)) { 4626 if (qla_ini_mode_enabled(vha)) 4627 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; 4628 else 4629 ct_req->req.rff_id.fc4_feature = BIT_0; 4630 } else if (qla_ini_mode_enabled(vha)) { 4631 ct_req->req.rff_id.fc4_feature = BIT_1; 4632 } 4633 } 4634 4635 /* 4636 * qlt_init_atio_q_entries() - Initializes ATIO queue entries. 4637 * @ha: HA context 4638 * 4639 * Beginning of ATIO ring has initialization control block already built 4640 * by nvram config routine. 4641 * 4642 * Returns 0 on success. 4643 */ 4644 void 4645 qlt_init_atio_q_entries(struct scsi_qla_host *vha) 4646 { 4647 struct qla_hw_data *ha = vha->hw; 4648 uint16_t cnt; 4649 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; 4650 4651 if (!qla_tgt_mode_enabled(vha)) 4652 return; 4653 4654 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { 4655 pkt->u.raw.signature = ATIO_PROCESSED; 4656 pkt++; 4657 } 4658 4659 } 4660 4661 /* 4662 * qlt_24xx_process_atio_queue() - Process ATIO queue entries. 4663 * @ha: SCSI driver HA context 4664 */ 4665 void 4666 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha) 4667 { 4668 struct qla_hw_data *ha = vha->hw; 4669 struct device_reg_24xx __iomem *reg = &ha->iobase->isp24; 4670 struct atio_from_isp *pkt; 4671 int cnt, i; 4672 4673 if (!vha->flags.online) 4674 return; 4675 4676 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) { 4677 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 4678 cnt = pkt->u.raw.entry_count; 4679 4680 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt); 4681 4682 for (i = 0; i < cnt; i++) { 4683 ha->tgt.atio_ring_index++; 4684 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { 4685 ha->tgt.atio_ring_index = 0; 4686 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; 4687 } else 4688 ha->tgt.atio_ring_ptr++; 4689 4690 pkt->u.raw.signature = ATIO_PROCESSED; 4691 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 4692 } 4693 wmb(); 4694 } 4695 4696 /* Adjust ring index */ 4697 WRT_REG_DWORD(®->atio_q_out, ha->tgt.atio_ring_index); 4698 } 4699 4700 void 4701 qlt_24xx_config_rings(struct scsi_qla_host *vha, device_reg_t __iomem *reg) 4702 { 4703 struct qla_hw_data *ha = vha->hw; 4704 4705 /* FIXME: atio_q in/out for ha->mqenable=1..? */ 4706 if (ha->mqenable) { 4707 #if 0 4708 WRT_REG_DWORD(®->isp25mq.atio_q_in, 0); 4709 WRT_REG_DWORD(®->isp25mq.atio_q_out, 0); 4710 RD_REG_DWORD(®->isp25mq.atio_q_out); 4711 #endif 4712 } else { 4713 /* Setup APTIO registers for target mode */ 4714 WRT_REG_DWORD(®->isp24.atio_q_in, 0); 4715 WRT_REG_DWORD(®->isp24.atio_q_out, 0); 4716 RD_REG_DWORD(®->isp24.atio_q_out); 4717 } 4718 } 4719 4720 void 4721 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 4722 { 4723 struct qla_hw_data *ha = vha->hw; 4724 4725 if (qla_tgt_mode_enabled(vha)) { 4726 if (!ha->tgt.saved_set) { 4727 /* We save only once */ 4728 ha->tgt.saved_exchange_count = nv->exchange_count; 4729 ha->tgt.saved_firmware_options_1 = 4730 nv->firmware_options_1; 4731 ha->tgt.saved_firmware_options_2 = 4732 nv->firmware_options_2; 4733 ha->tgt.saved_firmware_options_3 = 4734 nv->firmware_options_3; 4735 ha->tgt.saved_set = 1; 4736 } 4737 4738 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 4739 4740 /* Enable target mode */ 4741 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 4742 4743 /* Disable ini mode, if requested */ 4744 if (!qla_ini_mode_enabled(vha)) 4745 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5); 4746 4747 /* Disable Full Login after LIP */ 4748 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 4749 /* Enable initial LIP */ 4750 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 4751 /* Enable FC tapes support */ 4752 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12); 4753 /* Disable Full Login after LIP */ 4754 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 4755 /* Enable target PRLI control */ 4756 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 4757 } else { 4758 if (ha->tgt.saved_set) { 4759 nv->exchange_count = ha->tgt.saved_exchange_count; 4760 nv->firmware_options_1 = 4761 ha->tgt.saved_firmware_options_1; 4762 nv->firmware_options_2 = 4763 ha->tgt.saved_firmware_options_2; 4764 nv->firmware_options_3 = 4765 ha->tgt.saved_firmware_options_3; 4766 } 4767 return; 4768 } 4769 4770 /* out-of-order frames reassembly */ 4771 nv->firmware_options_3 |= BIT_6|BIT_9; 4772 4773 if (ha->tgt.enable_class_2) { 4774 if (vha->flags.init_done) 4775 fc_host_supported_classes(vha->host) = 4776 FC_COS_CLASS2 | FC_COS_CLASS3; 4777 4778 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 4779 } else { 4780 if (vha->flags.init_done) 4781 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 4782 4783 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 4784 } 4785 } 4786 4787 void 4788 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, 4789 struct init_cb_24xx *icb) 4790 { 4791 struct qla_hw_data *ha = vha->hw; 4792 4793 if (ha->tgt.node_name_set) { 4794 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 4795 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 4796 } 4797 } 4798 4799 int 4800 qlt_24xx_process_response_error(struct scsi_qla_host *vha, 4801 struct sts_entry_24xx *pkt) 4802 { 4803 switch (pkt->entry_type) { 4804 case ABTS_RECV_24XX: 4805 case ABTS_RESP_24XX: 4806 case CTIO_TYPE7: 4807 case NOTIFY_ACK_TYPE: 4808 return 1; 4809 default: 4810 return 0; 4811 } 4812 } 4813 4814 void 4815 qlt_modify_vp_config(struct scsi_qla_host *vha, 4816 struct vp_config_entry_24xx *vpmod) 4817 { 4818 if (qla_tgt_mode_enabled(vha)) 4819 vpmod->options_idx1 &= ~BIT_5; 4820 /* Disable ini mode, if requested */ 4821 if (!qla_ini_mode_enabled(vha)) 4822 vpmod->options_idx1 &= ~BIT_4; 4823 } 4824 4825 void 4826 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) 4827 { 4828 if (!QLA_TGT_MODE_ENABLED()) 4829 return; 4830 4831 mutex_init(&ha->tgt.tgt_mutex); 4832 mutex_init(&ha->tgt.tgt_host_action_mutex); 4833 qlt_clear_mode(base_vha); 4834 } 4835 4836 int 4837 qlt_mem_alloc(struct qla_hw_data *ha) 4838 { 4839 if (!QLA_TGT_MODE_ENABLED()) 4840 return 0; 4841 4842 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * 4843 MAX_MULTI_ID_FABRIC, GFP_KERNEL); 4844 if (!ha->tgt.tgt_vp_map) 4845 return -ENOMEM; 4846 4847 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, 4848 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), 4849 &ha->tgt.atio_dma, GFP_KERNEL); 4850 if (!ha->tgt.atio_ring) { 4851 kfree(ha->tgt.tgt_vp_map); 4852 return -ENOMEM; 4853 } 4854 return 0; 4855 } 4856 4857 void 4858 qlt_mem_free(struct qla_hw_data *ha) 4859 { 4860 if (!QLA_TGT_MODE_ENABLED()) 4861 return; 4862 4863 if (ha->tgt.atio_ring) { 4864 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * 4865 sizeof(struct atio_from_isp), ha->tgt.atio_ring, 4866 ha->tgt.atio_dma); 4867 } 4868 kfree(ha->tgt.tgt_vp_map); 4869 } 4870 4871 /* vport_slock to be held by the caller */ 4872 void 4873 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) 4874 { 4875 if (!QLA_TGT_MODE_ENABLED()) 4876 return; 4877 4878 switch (cmd) { 4879 case SET_VP_IDX: 4880 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; 4881 break; 4882 case SET_AL_PA: 4883 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; 4884 break; 4885 case RESET_VP_IDX: 4886 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; 4887 break; 4888 case RESET_AL_PA: 4889 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; 4890 break; 4891 } 4892 } 4893 4894 static int __init qlt_parse_ini_mode(void) 4895 { 4896 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) 4897 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 4898 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) 4899 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; 4900 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) 4901 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; 4902 else 4903 return false; 4904 4905 return true; 4906 } 4907 4908 int __init qlt_init(void) 4909 { 4910 int ret; 4911 4912 if (!qlt_parse_ini_mode()) { 4913 ql_log(ql_log_fatal, NULL, 0xe06b, 4914 "qlt_parse_ini_mode() failed\n"); 4915 return -EINVAL; 4916 } 4917 4918 if (!QLA_TGT_MODE_ENABLED()) 4919 return 0; 4920 4921 qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep", 4922 sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0, 4923 NULL); 4924 if (!qla_tgt_cmd_cachep) { 4925 ql_log(ql_log_fatal, NULL, 0xe06c, 4926 "kmem_cache_create for qla_tgt_cmd_cachep failed\n"); 4927 return -ENOMEM; 4928 } 4929 4930 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", 4931 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct 4932 qla_tgt_mgmt_cmd), 0, NULL); 4933 if (!qla_tgt_mgmt_cmd_cachep) { 4934 ql_log(ql_log_fatal, NULL, 0xe06d, 4935 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); 4936 ret = -ENOMEM; 4937 goto out; 4938 } 4939 4940 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, 4941 mempool_free_slab, qla_tgt_mgmt_cmd_cachep); 4942 if (!qla_tgt_mgmt_cmd_mempool) { 4943 ql_log(ql_log_fatal, NULL, 0xe06e, 4944 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); 4945 ret = -ENOMEM; 4946 goto out_mgmt_cmd_cachep; 4947 } 4948 4949 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); 4950 if (!qla_tgt_wq) { 4951 ql_log(ql_log_fatal, NULL, 0xe06f, 4952 "alloc_workqueue for qla_tgt_wq failed\n"); 4953 ret = -ENOMEM; 4954 goto out_cmd_mempool; 4955 } 4956 /* 4957 * Return 1 to signal that initiator-mode is being disabled 4958 */ 4959 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; 4960 4961 out_cmd_mempool: 4962 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 4963 out_mgmt_cmd_cachep: 4964 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 4965 out: 4966 kmem_cache_destroy(qla_tgt_cmd_cachep); 4967 return ret; 4968 } 4969 4970 void qlt_exit(void) 4971 { 4972 if (!QLA_TGT_MODE_ENABLED()) 4973 return; 4974 4975 destroy_workqueue(qla_tgt_wq); 4976 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 4977 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 4978 kmem_cache_destroy(qla_tgt_cmd_cachep); 4979 } 4980