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. contigent 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 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 qla_tgt_mgmt_cmd *mcmd; 1268 int rc; 1269 1270 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f, 1271 "qla_target(%d): task abort (tag=%d)\n", 1272 vha->vp_idx, abts->exchange_addr_to_abort); 1273 1274 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 1275 if (mcmd == NULL) { 1276 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051, 1277 "qla_target(%d): %s: Allocation of ABORT cmd failed", 1278 vha->vp_idx, __func__); 1279 return -ENOMEM; 1280 } 1281 memset(mcmd, 0, sizeof(*mcmd)); 1282 1283 mcmd->sess = sess; 1284 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts)); 1285 1286 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, TMR_ABORT_TASK, 1287 abts->exchange_addr_to_abort); 1288 if (rc != 0) { 1289 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052, 1290 "qla_target(%d): tgt_ops->handle_tmr()" 1291 " failed: %d", vha->vp_idx, rc); 1292 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1293 return -EFAULT; 1294 } 1295 1296 return 0; 1297 } 1298 1299 /* 1300 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1301 */ 1302 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1303 struct abts_recv_from_24xx *abts) 1304 { 1305 struct qla_hw_data *ha = vha->hw; 1306 struct qla_tgt_sess *sess; 1307 uint32_t tag = abts->exchange_addr_to_abort; 1308 uint8_t s_id[3]; 1309 int rc; 1310 1311 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { 1312 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053, 1313 "qla_target(%d): ABTS: Abort Sequence not " 1314 "supported\n", vha->vp_idx); 1315 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1316 return; 1317 } 1318 1319 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { 1320 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010, 1321 "qla_target(%d): ABTS: Unknown Exchange " 1322 "Address received\n", vha->vp_idx); 1323 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1324 return; 1325 } 1326 1327 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011, 1328 "qla_target(%d): task abort (s_id=%x:%x:%x, " 1329 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2], 1330 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag, 1331 le32_to_cpu(abts->fcp_hdr_le.parameter)); 1332 1333 s_id[0] = abts->fcp_hdr_le.s_id[2]; 1334 s_id[1] = abts->fcp_hdr_le.s_id[1]; 1335 s_id[2] = abts->fcp_hdr_le.s_id[0]; 1336 1337 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 1338 if (!sess) { 1339 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012, 1340 "qla_target(%d): task abort for non-existant session\n", 1341 vha->vp_idx); 1342 rc = qlt_sched_sess_work(ha->tgt.qla_tgt, 1343 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts)); 1344 if (rc != 0) { 1345 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, 1346 false); 1347 } 1348 return; 1349 } 1350 1351 rc = __qlt_24xx_handle_abts(vha, abts, sess); 1352 if (rc != 0) { 1353 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, 1354 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n", 1355 vha->vp_idx, rc); 1356 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1357 return; 1358 } 1359 } 1360 1361 /* 1362 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1363 */ 1364 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, 1365 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) 1366 { 1367 struct atio_from_isp *atio = &mcmd->orig_iocb.atio; 1368 struct ctio7_to_24xx *ctio; 1369 1370 ql_dbg(ql_dbg_tgt, ha, 0xe008, 1371 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n", 1372 ha, atio, resp_code); 1373 1374 /* Send marker if required */ 1375 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS) 1376 return; 1377 1378 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL); 1379 if (ctio == NULL) { 1380 ql_dbg(ql_dbg_tgt, ha, 0xe04c, 1381 "qla_target(%d): %s failed: unable to allocate " 1382 "request packet\n", ha->vp_idx, __func__); 1383 return; 1384 } 1385 1386 ctio->entry_type = CTIO_TYPE7; 1387 ctio->entry_count = 1; 1388 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1389 ctio->nport_handle = mcmd->sess->loop_id; 1390 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1391 ctio->vp_index = ha->vp_idx; 1392 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1393 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1394 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1395 ctio->exchange_addr = atio->u.isp24.exchange_addr; 1396 ctio->u.status1.flags = (atio->u.isp24.attr << 9) | 1397 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1398 CTIO7_FLAGS_SEND_STATUS); 1399 ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 1400 ctio->u.status1.scsi_status = 1401 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); 1402 ctio->u.status1.response_len = __constant_cpu_to_le16(8); 1403 ctio->u.status1.sense_data[0] = resp_code; 1404 1405 qla2x00_start_iocbs(ha, ha->req); 1406 } 1407 1408 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) 1409 { 1410 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1411 } 1412 EXPORT_SYMBOL(qlt_free_mcmd); 1413 1414 /* callback from target fabric module code */ 1415 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) 1416 { 1417 struct scsi_qla_host *vha = mcmd->sess->vha; 1418 struct qla_hw_data *ha = vha->hw; 1419 unsigned long flags; 1420 1421 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013, 1422 "TM response mcmd (%p) status %#x state %#x", 1423 mcmd, mcmd->fc_tm_rsp, mcmd->flags); 1424 1425 spin_lock_irqsave(&ha->hardware_lock, flags); 1426 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) 1427 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, 1428 0, 0, 0, 0, 0, 0); 1429 else { 1430 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK) 1431 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, 1432 mcmd->fc_tm_rsp, false); 1433 else 1434 qlt_24xx_send_task_mgmt_ctio(vha, mcmd, 1435 mcmd->fc_tm_rsp); 1436 } 1437 /* 1438 * Make the callback for ->free_mcmd() to queue_work() and invoke 1439 * target_put_sess_cmd() to drop cmd_kref to 1. The final 1440 * target_put_sess_cmd() call will be made from TFO->check_stop_free() 1441 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd 1442 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> 1443 * qlt_xmit_tm_rsp() returns here.. 1444 */ 1445 ha->tgt.tgt_ops->free_mcmd(mcmd); 1446 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1447 } 1448 EXPORT_SYMBOL(qlt_xmit_tm_rsp); 1449 1450 /* No locks */ 1451 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm) 1452 { 1453 struct qla_tgt_cmd *cmd = prm->cmd; 1454 1455 BUG_ON(cmd->sg_cnt == 0); 1456 1457 prm->sg = (struct scatterlist *)cmd->sg; 1458 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, 1459 cmd->sg_cnt, cmd->dma_data_direction); 1460 if (unlikely(prm->seg_cnt == 0)) 1461 goto out_err; 1462 1463 prm->cmd->sg_mapped = 1; 1464 1465 /* 1466 * If greater than four sg entries then we need to allocate 1467 * the continuation entries 1468 */ 1469 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) 1470 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - 1471 prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont); 1472 1473 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n", 1474 prm->seg_cnt, prm->req_cnt); 1475 return 0; 1476 1477 out_err: 1478 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d, 1479 "qla_target(%d): PCI mapping failed: sg_cnt=%d", 1480 0, prm->cmd->sg_cnt); 1481 return -1; 1482 } 1483 1484 static inline void qlt_unmap_sg(struct scsi_qla_host *vha, 1485 struct qla_tgt_cmd *cmd) 1486 { 1487 struct qla_hw_data *ha = vha->hw; 1488 1489 BUG_ON(!cmd->sg_mapped); 1490 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 1491 cmd->sg_mapped = 0; 1492 } 1493 1494 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, 1495 uint32_t req_cnt) 1496 { 1497 struct qla_hw_data *ha = vha->hw; 1498 device_reg_t __iomem *reg = ha->iobase; 1499 uint32_t cnt; 1500 1501 if (vha->req->cnt < (req_cnt + 2)) { 1502 cnt = (uint16_t)RD_REG_DWORD(®->isp24.req_q_out); 1503 1504 ql_dbg(ql_dbg_tgt, vha, 0xe00a, 1505 "Request ring circled: cnt=%d, vha->->ring_index=%d, " 1506 "vha->req->cnt=%d, req_cnt=%d\n", cnt, 1507 vha->req->ring_index, vha->req->cnt, req_cnt); 1508 if (vha->req->ring_index < cnt) 1509 vha->req->cnt = cnt - vha->req->ring_index; 1510 else 1511 vha->req->cnt = vha->req->length - 1512 (vha->req->ring_index - cnt); 1513 } 1514 1515 if (unlikely(vha->req->cnt < (req_cnt + 2))) { 1516 ql_dbg(ql_dbg_tgt, vha, 0xe00b, 1517 "qla_target(%d): There is no room in the " 1518 "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, " 1519 "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index, 1520 vha->req->cnt, req_cnt); 1521 return -EAGAIN; 1522 } 1523 vha->req->cnt -= req_cnt; 1524 1525 return 0; 1526 } 1527 1528 /* 1529 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1530 */ 1531 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha) 1532 { 1533 /* Adjust ring index. */ 1534 vha->req->ring_index++; 1535 if (vha->req->ring_index == vha->req->length) { 1536 vha->req->ring_index = 0; 1537 vha->req->ring_ptr = vha->req->ring; 1538 } else { 1539 vha->req->ring_ptr++; 1540 } 1541 return (cont_entry_t *)vha->req->ring_ptr; 1542 } 1543 1544 /* ha->hardware_lock supposed to be held on entry */ 1545 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha) 1546 { 1547 struct qla_hw_data *ha = vha->hw; 1548 uint32_t h; 1549 1550 h = ha->tgt.current_handle; 1551 /* always increment cmd handle */ 1552 do { 1553 ++h; 1554 if (h > MAX_OUTSTANDING_COMMANDS) 1555 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ 1556 if (h == ha->tgt.current_handle) { 1557 ql_dbg(ql_dbg_tgt, vha, 0xe04e, 1558 "qla_target(%d): Ran out of " 1559 "empty cmd slots in ha %p\n", vha->vp_idx, ha); 1560 h = QLA_TGT_NULL_HANDLE; 1561 break; 1562 } 1563 } while ((h == QLA_TGT_NULL_HANDLE) || 1564 (h == QLA_TGT_SKIP_HANDLE) || 1565 (ha->tgt.cmds[h-1] != NULL)); 1566 1567 if (h != QLA_TGT_NULL_HANDLE) 1568 ha->tgt.current_handle = h; 1569 1570 return h; 1571 } 1572 1573 /* ha->hardware_lock supposed to be held on entry */ 1574 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, 1575 struct scsi_qla_host *vha) 1576 { 1577 uint32_t h; 1578 struct ctio7_to_24xx *pkt; 1579 struct qla_hw_data *ha = vha->hw; 1580 struct atio_from_isp *atio = &prm->cmd->atio; 1581 1582 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr; 1583 prm->pkt = pkt; 1584 memset(pkt, 0, sizeof(*pkt)); 1585 1586 pkt->entry_type = CTIO_TYPE7; 1587 pkt->entry_count = (uint8_t)prm->req_cnt; 1588 pkt->vp_index = vha->vp_idx; 1589 1590 h = qlt_make_handle(vha); 1591 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 1592 /* 1593 * CTIO type 7 from the firmware doesn't provide a way to 1594 * know the initiator's LOOP ID, hence we can't find 1595 * the session and, so, the command. 1596 */ 1597 return -EAGAIN; 1598 } else 1599 ha->tgt.cmds[h-1] = prm->cmd; 1600 1601 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 1602 pkt->nport_handle = prm->cmd->loop_id; 1603 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1604 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1605 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1606 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1607 pkt->exchange_addr = atio->u.isp24.exchange_addr; 1608 pkt->u.status0.flags |= (atio->u.isp24.attr << 9); 1609 pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 1610 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); 1611 1612 ql_dbg(ql_dbg_tgt, vha, 0xe00c, 1613 "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n", 1614 vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT, 1615 le16_to_cpu(pkt->u.status0.ox_id)); 1616 return 0; 1617 } 1618 1619 /* 1620 * ha->hardware_lock supposed to be held on entry. We have already made sure 1621 * that there is sufficient amount of request entries to not drop it. 1622 */ 1623 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm, 1624 struct scsi_qla_host *vha) 1625 { 1626 int cnt; 1627 uint32_t *dword_ptr; 1628 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1629 1630 /* Build continuation packets */ 1631 while (prm->seg_cnt > 0) { 1632 cont_a64_entry_t *cont_pkt64 = 1633 (cont_a64_entry_t *)qlt_get_req_pkt(vha); 1634 1635 /* 1636 * Make sure that from cont_pkt64 none of 1637 * 64-bit specific fields used for 32-bit 1638 * addressing. Cast to (cont_entry_t *) for 1639 * that. 1640 */ 1641 1642 memset(cont_pkt64, 0, sizeof(*cont_pkt64)); 1643 1644 cont_pkt64->entry_count = 1; 1645 cont_pkt64->sys_define = 0; 1646 1647 if (enable_64bit_addressing) { 1648 cont_pkt64->entry_type = CONTINUE_A64_TYPE; 1649 dword_ptr = 1650 (uint32_t *)&cont_pkt64->dseg_0_address; 1651 } else { 1652 cont_pkt64->entry_type = CONTINUE_TYPE; 1653 dword_ptr = 1654 (uint32_t *)&((cont_entry_t *) 1655 cont_pkt64)->dseg_0_address; 1656 } 1657 1658 /* Load continuation entry data segments */ 1659 for (cnt = 0; 1660 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; 1661 cnt++, prm->seg_cnt--) { 1662 *dword_ptr++ = 1663 cpu_to_le32(pci_dma_lo32 1664 (sg_dma_address(prm->sg))); 1665 if (enable_64bit_addressing) { 1666 *dword_ptr++ = 1667 cpu_to_le32(pci_dma_hi32 1668 (sg_dma_address 1669 (prm->sg))); 1670 } 1671 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1672 1673 ql_dbg(ql_dbg_tgt, vha, 0xe00d, 1674 "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n", 1675 (long long unsigned int) 1676 pci_dma_hi32(sg_dma_address(prm->sg)), 1677 (long long unsigned int) 1678 pci_dma_lo32(sg_dma_address(prm->sg)), 1679 (int)sg_dma_len(prm->sg)); 1680 1681 prm->sg = sg_next(prm->sg); 1682 } 1683 } 1684 } 1685 1686 /* 1687 * ha->hardware_lock supposed to be held on entry. We have already made sure 1688 * that there is sufficient amount of request entries to not drop it. 1689 */ 1690 static void qlt_load_data_segments(struct qla_tgt_prm *prm, 1691 struct scsi_qla_host *vha) 1692 { 1693 int cnt; 1694 uint32_t *dword_ptr; 1695 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1696 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt; 1697 1698 ql_dbg(ql_dbg_tgt, vha, 0xe00e, 1699 "iocb->scsi_status=%x, iocb->flags=%x\n", 1700 le16_to_cpu(pkt24->u.status0.scsi_status), 1701 le16_to_cpu(pkt24->u.status0.flags)); 1702 1703 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen); 1704 1705 /* Setup packet address segment pointer */ 1706 dword_ptr = pkt24->u.status0.dseg_0_address; 1707 1708 /* Set total data segment count */ 1709 if (prm->seg_cnt) 1710 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt); 1711 1712 if (prm->seg_cnt == 0) { 1713 /* No data transfer */ 1714 *dword_ptr++ = 0; 1715 *dword_ptr = 0; 1716 return; 1717 } 1718 1719 /* If scatter gather */ 1720 ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments..."); 1721 1722 /* Load command entry data segments */ 1723 for (cnt = 0; 1724 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; 1725 cnt++, prm->seg_cnt--) { 1726 *dword_ptr++ = 1727 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); 1728 if (enable_64bit_addressing) { 1729 *dword_ptr++ = 1730 cpu_to_le32(pci_dma_hi32( 1731 sg_dma_address(prm->sg))); 1732 } 1733 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1734 1735 ql_dbg(ql_dbg_tgt, vha, 0xe010, 1736 "S/G Segment phys_addr=%llx:%llx, len=%d\n", 1737 (long long unsigned int)pci_dma_hi32(sg_dma_address( 1738 prm->sg)), 1739 (long long unsigned int)pci_dma_lo32(sg_dma_address( 1740 prm->sg)), 1741 (int)sg_dma_len(prm->sg)); 1742 1743 prm->sg = sg_next(prm->sg); 1744 } 1745 1746 qlt_load_cont_data_segments(prm, vha); 1747 } 1748 1749 static inline int qlt_has_data(struct qla_tgt_cmd *cmd) 1750 { 1751 return cmd->bufflen > 0; 1752 } 1753 1754 /* 1755 * Called without ha->hardware_lock held 1756 */ 1757 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, 1758 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status, 1759 uint32_t *full_req_cnt) 1760 { 1761 struct qla_tgt *tgt = cmd->tgt; 1762 struct scsi_qla_host *vha = tgt->vha; 1763 struct qla_hw_data *ha = vha->hw; 1764 struct se_cmd *se_cmd = &cmd->se_cmd; 1765 1766 if (unlikely(cmd->aborted)) { 1767 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, 1768 "qla_target(%d): terminating exchange " 1769 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd, 1770 se_cmd, cmd->tag); 1771 1772 cmd->state = QLA_TGT_STATE_ABORTED; 1773 1774 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0); 1775 1776 /* !! At this point cmd could be already freed !! */ 1777 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED; 1778 } 1779 1780 ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n", 1781 vha->vp_idx, cmd->tag); 1782 1783 prm->cmd = cmd; 1784 prm->tgt = tgt; 1785 prm->rq_result = scsi_status; 1786 prm->sense_buffer = &cmd->sense_buffer[0]; 1787 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; 1788 prm->sg = NULL; 1789 prm->seg_cnt = -1; 1790 prm->req_cnt = 1; 1791 prm->add_status_pkt = 0; 1792 1793 ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n", 1794 prm->rq_result, xmit_type); 1795 1796 /* Send marker if required */ 1797 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 1798 return -EFAULT; 1799 1800 ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx); 1801 1802 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { 1803 if (qlt_pci_map_calc_cnt(prm) != 0) 1804 return -EAGAIN; 1805 } 1806 1807 *full_req_cnt = prm->req_cnt; 1808 1809 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { 1810 prm->residual = se_cmd->residual_count; 1811 ql_dbg(ql_dbg_tgt, vha, 0xe014, 1812 "Residual underflow: %d (tag %d, " 1813 "op %x, bufflen %d, rq_result %x)\n", prm->residual, 1814 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1815 cmd->bufflen, prm->rq_result); 1816 prm->rq_result |= SS_RESIDUAL_UNDER; 1817 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 1818 prm->residual = se_cmd->residual_count; 1819 ql_dbg(ql_dbg_tgt, vha, 0xe015, 1820 "Residual overflow: %d (tag %d, " 1821 "op %x, bufflen %d, rq_result %x)\n", prm->residual, 1822 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1823 cmd->bufflen, prm->rq_result); 1824 prm->rq_result |= SS_RESIDUAL_OVER; 1825 } 1826 1827 if (xmit_type & QLA_TGT_XMIT_STATUS) { 1828 /* 1829 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be 1830 * ignored in *xmit_response() below 1831 */ 1832 if (qlt_has_data(cmd)) { 1833 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || 1834 (IS_FWI2_CAPABLE(ha) && 1835 (prm->rq_result != 0))) { 1836 prm->add_status_pkt = 1; 1837 (*full_req_cnt)++; 1838 } 1839 } 1840 } 1841 1842 ql_dbg(ql_dbg_tgt, vha, 0xe016, 1843 "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n", 1844 prm->req_cnt, *full_req_cnt, prm->add_status_pkt); 1845 1846 return 0; 1847 } 1848 1849 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, 1850 struct qla_tgt_cmd *cmd, int sending_sense) 1851 { 1852 if (ha->tgt.enable_class_2) 1853 return 0; 1854 1855 if (sending_sense) 1856 return cmd->conf_compl_supported; 1857 else 1858 return ha->tgt.enable_explicit_conf && 1859 cmd->conf_compl_supported; 1860 } 1861 1862 #ifdef CONFIG_QLA_TGT_DEBUG_SRR 1863 /* 1864 * Original taken from the XFS code 1865 */ 1866 static unsigned long qlt_srr_random(void) 1867 { 1868 static int Inited; 1869 static unsigned long RandomValue; 1870 static DEFINE_SPINLOCK(lock); 1871 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ 1872 register long rv; 1873 register long lo; 1874 register long hi; 1875 unsigned long flags; 1876 1877 spin_lock_irqsave(&lock, flags); 1878 if (!Inited) { 1879 RandomValue = jiffies; 1880 Inited = 1; 1881 } 1882 rv = RandomValue; 1883 hi = rv / 127773; 1884 lo = rv % 127773; 1885 rv = 16807 * lo - 2836 * hi; 1886 if (rv <= 0) 1887 rv += 2147483647; 1888 RandomValue = rv; 1889 spin_unlock_irqrestore(&lock, flags); 1890 return rv; 1891 } 1892 1893 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1894 { 1895 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ 1896 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) 1897 == 50) { 1898 *xmit_type &= ~QLA_TGT_XMIT_STATUS; 1899 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, 1900 "Dropping cmd %p (tag %d) status", cmd, cmd->tag); 1901 } 1902 #endif 1903 /* 1904 * It's currently not possible to simulate SRRs for FCP_WRITE without 1905 * a physical link layer failure, so don't even try here.. 1906 */ 1907 if (cmd->dma_data_direction != DMA_FROM_DEVICE) 1908 return; 1909 1910 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && 1911 ((qlt_srr_random() % 100) == 20)) { 1912 int i, leave = 0; 1913 unsigned int tot_len = 0; 1914 1915 while (leave == 0) 1916 leave = qlt_srr_random() % cmd->sg_cnt; 1917 1918 for (i = 0; i < leave; i++) 1919 tot_len += cmd->sg[i].length; 1920 1921 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, 1922 "Cutting cmd %p (tag %d) buffer" 1923 " tail to len %d, sg_cnt %d (cmd->bufflen %d," 1924 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave, 1925 cmd->bufflen, cmd->sg_cnt); 1926 1927 cmd->bufflen = tot_len; 1928 cmd->sg_cnt = leave; 1929 } 1930 1931 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { 1932 unsigned int offset = qlt_srr_random() % cmd->bufflen; 1933 1934 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, 1935 "Cutting cmd %p (tag %d) buffer head " 1936 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset, 1937 cmd->bufflen); 1938 if (offset == 0) 1939 *xmit_type &= ~QLA_TGT_XMIT_DATA; 1940 else if (qlt_set_data_offset(cmd, offset)) { 1941 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, 1942 "qlt_set_data_offset() failed (tag %d)", cmd->tag); 1943 } 1944 } 1945 } 1946 #else 1947 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1948 {} 1949 #endif 1950 1951 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, 1952 struct qla_tgt_prm *prm) 1953 { 1954 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, 1955 (uint32_t)sizeof(ctio->u.status1.sense_data)); 1956 ctio->u.status0.flags |= 1957 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); 1958 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { 1959 ctio->u.status0.flags |= __constant_cpu_to_le16( 1960 CTIO7_FLAGS_EXPLICIT_CONFORM | 1961 CTIO7_FLAGS_CONFORM_REQ); 1962 } 1963 ctio->u.status0.residual = cpu_to_le32(prm->residual); 1964 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); 1965 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { 1966 int i; 1967 1968 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { 1969 if (prm->cmd->se_cmd.scsi_status != 0) { 1970 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, 1971 "Skipping EXPLICIT_CONFORM and " 1972 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " 1973 "non GOOD status\n"); 1974 goto skip_explict_conf; 1975 } 1976 ctio->u.status1.flags |= __constant_cpu_to_le16( 1977 CTIO7_FLAGS_EXPLICIT_CONFORM | 1978 CTIO7_FLAGS_CONFORM_REQ); 1979 } 1980 skip_explict_conf: 1981 ctio->u.status1.flags &= 1982 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 1983 ctio->u.status1.flags |= 1984 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 1985 ctio->u.status1.scsi_status |= 1986 __constant_cpu_to_le16(SS_SENSE_LEN_VALID); 1987 ctio->u.status1.sense_length = 1988 cpu_to_le16(prm->sense_buffer_len); 1989 for (i = 0; i < prm->sense_buffer_len/4; i++) 1990 ((uint32_t *)ctio->u.status1.sense_data)[i] = 1991 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); 1992 #if 0 1993 if (unlikely((prm->sense_buffer_len % 4) != 0)) { 1994 static int q; 1995 if (q < 10) { 1996 ql_dbg(ql_dbg_tgt, vha, 0xe04f, 1997 "qla_target(%d): %d bytes of sense " 1998 "lost", prm->tgt->ha->vp_idx, 1999 prm->sense_buffer_len % 4); 2000 q++; 2001 } 2002 } 2003 #endif 2004 } else { 2005 ctio->u.status1.flags &= 2006 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 2007 ctio->u.status1.flags |= 2008 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 2009 ctio->u.status1.sense_length = 0; 2010 memset(ctio->u.status1.sense_data, 0, 2011 sizeof(ctio->u.status1.sense_data)); 2012 } 2013 2014 /* Sense with len > 24, is it possible ??? */ 2015 } 2016 2017 /* 2018 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * 2019 * QLA_TGT_XMIT_STATUS for >= 24xx silicon 2020 */ 2021 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, 2022 uint8_t scsi_status) 2023 { 2024 struct scsi_qla_host *vha = cmd->vha; 2025 struct qla_hw_data *ha = vha->hw; 2026 struct ctio7_to_24xx *pkt; 2027 struct qla_tgt_prm prm; 2028 uint32_t full_req_cnt = 0; 2029 unsigned long flags = 0; 2030 int res; 2031 2032 memset(&prm, 0, sizeof(prm)); 2033 qlt_check_srr_debug(cmd, &xmit_type); 2034 2035 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, 2036 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, " 2037 "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ? 2038 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction); 2039 2040 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, 2041 &full_req_cnt); 2042 if (unlikely(res != 0)) { 2043 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED) 2044 return 0; 2045 2046 return res; 2047 } 2048 2049 spin_lock_irqsave(&ha->hardware_lock, flags); 2050 2051 /* Does F/W have an IOCBs for this request */ 2052 res = qlt_check_reserve_free_req(vha, full_req_cnt); 2053 if (unlikely(res)) 2054 goto out_unmap_unlock; 2055 2056 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2057 if (unlikely(res != 0)) 2058 goto out_unmap_unlock; 2059 2060 2061 pkt = (struct ctio7_to_24xx *)prm.pkt; 2062 2063 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { 2064 pkt->u.status0.flags |= 2065 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN | 2066 CTIO7_FLAGS_STATUS_MODE_0); 2067 2068 qlt_load_data_segments(&prm, vha); 2069 2070 if (prm.add_status_pkt == 0) { 2071 if (xmit_type & QLA_TGT_XMIT_STATUS) { 2072 pkt->u.status0.scsi_status = 2073 cpu_to_le16(prm.rq_result); 2074 pkt->u.status0.residual = 2075 cpu_to_le32(prm.residual); 2076 pkt->u.status0.flags |= __constant_cpu_to_le16( 2077 CTIO7_FLAGS_SEND_STATUS); 2078 if (qlt_need_explicit_conf(ha, cmd, 0)) { 2079 pkt->u.status0.flags |= 2080 __constant_cpu_to_le16( 2081 CTIO7_FLAGS_EXPLICIT_CONFORM | 2082 CTIO7_FLAGS_CONFORM_REQ); 2083 } 2084 } 2085 2086 } else { 2087 /* 2088 * We have already made sure that there is sufficient 2089 * amount of request entries to not drop HW lock in 2090 * req_pkt(). 2091 */ 2092 struct ctio7_to_24xx *ctio = 2093 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); 2094 2095 ql_dbg(ql_dbg_tgt, vha, 0xe019, 2096 "Building additional status packet\n"); 2097 2098 memcpy(ctio, pkt, sizeof(*ctio)); 2099 ctio->entry_count = 1; 2100 ctio->dseg_count = 0; 2101 ctio->u.status1.flags &= ~__constant_cpu_to_le16( 2102 CTIO7_FLAGS_DATA_IN); 2103 2104 /* Real finish is ctio_m1's finish */ 2105 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; 2106 pkt->u.status0.flags |= __constant_cpu_to_le16( 2107 CTIO7_FLAGS_DONT_RET_CTIO); 2108 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, 2109 &prm); 2110 pr_debug("Status CTIO7: %p\n", ctio); 2111 } 2112 } else 2113 qlt_24xx_init_ctio_to_isp(pkt, &prm); 2114 2115 2116 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ 2117 2118 ql_dbg(ql_dbg_tgt, vha, 0xe01a, 2119 "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n", 2120 pkt, scsi_status); 2121 2122 qla2x00_start_iocbs(vha, vha->req); 2123 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2124 2125 return 0; 2126 2127 out_unmap_unlock: 2128 if (cmd->sg_mapped) 2129 qlt_unmap_sg(vha, cmd); 2130 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2131 2132 return res; 2133 } 2134 EXPORT_SYMBOL(qlt_xmit_response); 2135 2136 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) 2137 { 2138 struct ctio7_to_24xx *pkt; 2139 struct scsi_qla_host *vha = cmd->vha; 2140 struct qla_hw_data *ha = vha->hw; 2141 struct qla_tgt *tgt = cmd->tgt; 2142 struct qla_tgt_prm prm; 2143 unsigned long flags; 2144 int res = 0; 2145 2146 memset(&prm, 0, sizeof(prm)); 2147 prm.cmd = cmd; 2148 prm.tgt = tgt; 2149 prm.sg = NULL; 2150 prm.req_cnt = 1; 2151 2152 /* Send marker if required */ 2153 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2154 return -EIO; 2155 2156 ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)", 2157 (int)vha->vp_idx); 2158 2159 /* Calculate number of entries and segments required */ 2160 if (qlt_pci_map_calc_cnt(&prm) != 0) 2161 return -EAGAIN; 2162 2163 spin_lock_irqsave(&ha->hardware_lock, flags); 2164 2165 /* Does F/W have an IOCBs for this request */ 2166 res = qlt_check_reserve_free_req(vha, prm.req_cnt); 2167 if (res != 0) 2168 goto out_unlock_free_unmap; 2169 2170 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2171 if (unlikely(res != 0)) 2172 goto out_unlock_free_unmap; 2173 pkt = (struct ctio7_to_24xx *)prm.pkt; 2174 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT | 2175 CTIO7_FLAGS_STATUS_MODE_0); 2176 qlt_load_data_segments(&prm, vha); 2177 2178 cmd->state = QLA_TGT_STATE_NEED_DATA; 2179 2180 qla2x00_start_iocbs(vha, vha->req); 2181 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2182 2183 return res; 2184 2185 out_unlock_free_unmap: 2186 if (cmd->sg_mapped) 2187 qlt_unmap_sg(vha, cmd); 2188 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2189 2190 return res; 2191 } 2192 EXPORT_SYMBOL(qlt_rdy_to_xfer); 2193 2194 /* If hardware_lock held on entry, might drop it, then reaquire */ 2195 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 2196 static int __qlt_send_term_exchange(struct scsi_qla_host *vha, 2197 struct qla_tgt_cmd *cmd, 2198 struct atio_from_isp *atio) 2199 { 2200 struct ctio7_to_24xx *ctio24; 2201 struct qla_hw_data *ha = vha->hw; 2202 request_t *pkt; 2203 int ret = 0; 2204 2205 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); 2206 2207 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 2208 if (pkt == NULL) { 2209 ql_dbg(ql_dbg_tgt, vha, 0xe050, 2210 "qla_target(%d): %s failed: unable to allocate " 2211 "request packet\n", vha->vp_idx, __func__); 2212 return -ENOMEM; 2213 } 2214 2215 if (cmd != NULL) { 2216 if (cmd->state < QLA_TGT_STATE_PROCESSED) { 2217 ql_dbg(ql_dbg_tgt, vha, 0xe051, 2218 "qla_target(%d): Terminating cmd %p with " 2219 "incorrect state %d\n", vha->vp_idx, cmd, 2220 cmd->state); 2221 } else 2222 ret = 1; 2223 } 2224 2225 pkt->entry_count = 1; 2226 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 2227 2228 ctio24 = (struct ctio7_to_24xx *)pkt; 2229 ctio24->entry_type = CTIO_TYPE7; 2230 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED; 2231 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 2232 ctio24->vp_index = vha->vp_idx; 2233 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2234 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2235 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2236 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 2237 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 2238 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 2239 CTIO7_FLAGS_TERMINATE); 2240 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 2241 2242 /* Most likely, it isn't needed */ 2243 ctio24->u.status1.residual = get_unaligned((uint32_t *) 2244 &atio->u.isp24.fcp_cmnd.add_cdb[ 2245 atio->u.isp24.fcp_cmnd.add_cdb_len]); 2246 if (ctio24->u.status1.residual != 0) 2247 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 2248 2249 qla2x00_start_iocbs(vha, vha->req); 2250 return ret; 2251 } 2252 2253 static void qlt_send_term_exchange(struct scsi_qla_host *vha, 2254 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked) 2255 { 2256 unsigned long flags; 2257 int rc; 2258 2259 if (qlt_issue_marker(vha, ha_locked) < 0) 2260 return; 2261 2262 if (ha_locked) { 2263 rc = __qlt_send_term_exchange(vha, cmd, atio); 2264 goto done; 2265 } 2266 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 2267 rc = __qlt_send_term_exchange(vha, cmd, atio); 2268 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 2269 done: 2270 if (rc == 1) { 2271 if (!ha_locked && !in_interrupt()) 2272 msleep(250); /* just in case */ 2273 2274 vha->hw->tgt.tgt_ops->free_cmd(cmd); 2275 } 2276 } 2277 2278 void qlt_free_cmd(struct qla_tgt_cmd *cmd) 2279 { 2280 BUG_ON(cmd->sg_mapped); 2281 2282 if (unlikely(cmd->free_sg)) 2283 kfree(cmd->sg); 2284 kmem_cache_free(qla_tgt_cmd_cachep, cmd); 2285 } 2286 EXPORT_SYMBOL(qlt_free_cmd); 2287 2288 /* ha->hardware_lock supposed to be held on entry */ 2289 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, 2290 struct qla_tgt_cmd *cmd, void *ctio) 2291 { 2292 struct qla_tgt_srr_ctio *sc; 2293 struct qla_hw_data *ha = vha->hw; 2294 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2295 struct qla_tgt_srr_imm *imm; 2296 2297 tgt->ctio_srr_id++; 2298 2299 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, 2300 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); 2301 2302 if (!ctio) { 2303 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, 2304 "qla_target(%d): SRR CTIO, but ctio is NULL\n", 2305 vha->vp_idx); 2306 return -EINVAL; 2307 } 2308 2309 sc = kzalloc(sizeof(*sc), GFP_ATOMIC); 2310 if (sc != NULL) { 2311 sc->cmd = cmd; 2312 /* IRQ is already OFF */ 2313 spin_lock(&tgt->srr_lock); 2314 sc->srr_id = tgt->ctio_srr_id; 2315 list_add_tail(&sc->srr_list_entry, 2316 &tgt->srr_ctio_list); 2317 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, 2318 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); 2319 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 2320 int found = 0; 2321 list_for_each_entry(imm, &tgt->srr_imm_list, 2322 srr_list_entry) { 2323 if (imm->srr_id == sc->srr_id) { 2324 found = 1; 2325 break; 2326 } 2327 } 2328 if (found) { 2329 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, 2330 "Scheduling srr work\n"); 2331 schedule_work(&tgt->srr_work); 2332 } else { 2333 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, 2334 "qla_target(%d): imm_srr_id " 2335 "== ctio_srr_id (%d), but there is no " 2336 "corresponding SRR IMM, deleting CTIO " 2337 "SRR %p\n", vha->vp_idx, 2338 tgt->ctio_srr_id, sc); 2339 list_del(&sc->srr_list_entry); 2340 spin_unlock(&tgt->srr_lock); 2341 2342 kfree(sc); 2343 return -EINVAL; 2344 } 2345 } 2346 spin_unlock(&tgt->srr_lock); 2347 } else { 2348 struct qla_tgt_srr_imm *ti; 2349 2350 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, 2351 "qla_target(%d): Unable to allocate SRR CTIO entry\n", 2352 vha->vp_idx); 2353 spin_lock(&tgt->srr_lock); 2354 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, 2355 srr_list_entry) { 2356 if (imm->srr_id == tgt->ctio_srr_id) { 2357 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, 2358 "IMM SRR %p deleted (id %d)\n", 2359 imm, imm->srr_id); 2360 list_del(&imm->srr_list_entry); 2361 qlt_reject_free_srr_imm(vha, imm, 1); 2362 } 2363 } 2364 spin_unlock(&tgt->srr_lock); 2365 2366 return -ENOMEM; 2367 } 2368 2369 return 0; 2370 } 2371 2372 /* 2373 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2374 */ 2375 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, 2376 struct qla_tgt_cmd *cmd, uint32_t status) 2377 { 2378 int term = 0; 2379 2380 if (ctio != NULL) { 2381 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; 2382 term = !(c->flags & 2383 __constant_cpu_to_le16(OF_TERM_EXCH)); 2384 } else 2385 term = 1; 2386 2387 if (term) 2388 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 2389 2390 return term; 2391 } 2392 2393 /* ha->hardware_lock supposed to be held on entry */ 2394 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, 2395 uint32_t handle) 2396 { 2397 struct qla_hw_data *ha = vha->hw; 2398 2399 handle--; 2400 if (ha->tgt.cmds[handle] != NULL) { 2401 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; 2402 ha->tgt.cmds[handle] = NULL; 2403 return cmd; 2404 } else 2405 return NULL; 2406 } 2407 2408 /* ha->hardware_lock supposed to be held on entry */ 2409 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, 2410 uint32_t handle, void *ctio) 2411 { 2412 struct qla_tgt_cmd *cmd = NULL; 2413 2414 /* Clear out internal marks */ 2415 handle &= ~(CTIO_COMPLETION_HANDLE_MARK | 2416 CTIO_INTERMEDIATE_HANDLE_MARK); 2417 2418 if (handle != QLA_TGT_NULL_HANDLE) { 2419 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) { 2420 ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s", 2421 "SKIP_HANDLE CTIO\n"); 2422 return NULL; 2423 } 2424 /* handle-1 is actually used */ 2425 if (unlikely(handle > MAX_OUTSTANDING_COMMANDS)) { 2426 ql_dbg(ql_dbg_tgt, vha, 0xe052, 2427 "qla_target(%d): Wrong handle %x received\n", 2428 vha->vp_idx, handle); 2429 return NULL; 2430 } 2431 cmd = qlt_get_cmd(vha, handle); 2432 if (unlikely(cmd == NULL)) { 2433 ql_dbg(ql_dbg_tgt, vha, 0xe053, 2434 "qla_target(%d): Suspicious: unable to " 2435 "find the command with handle %x\n", vha->vp_idx, 2436 handle); 2437 return NULL; 2438 } 2439 } else if (ctio != NULL) { 2440 /* We can't get loop ID from CTIO7 */ 2441 ql_dbg(ql_dbg_tgt, vha, 0xe054, 2442 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " 2443 "support NULL handles\n", vha->vp_idx); 2444 return NULL; 2445 } 2446 2447 return cmd; 2448 } 2449 2450 /* 2451 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2452 */ 2453 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, 2454 uint32_t status, void *ctio) 2455 { 2456 struct qla_hw_data *ha = vha->hw; 2457 struct se_cmd *se_cmd; 2458 struct target_core_fabric_ops *tfo; 2459 struct qla_tgt_cmd *cmd; 2460 2461 ql_dbg(ql_dbg_tgt, vha, 0xe01e, 2462 "qla_target(%d): handle(ctio %p status %#x) <- %08x\n", 2463 vha->vp_idx, ctio, status, handle); 2464 2465 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { 2466 /* That could happen only in case of an error/reset/abort */ 2467 if (status != CTIO_SUCCESS) { 2468 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, 2469 "Intermediate CTIO received" 2470 " (status %x)\n", status); 2471 } 2472 return; 2473 } 2474 2475 cmd = qlt_ctio_to_cmd(vha, handle, ctio); 2476 if (cmd == NULL) 2477 return; 2478 2479 se_cmd = &cmd->se_cmd; 2480 tfo = se_cmd->se_tfo; 2481 2482 if (cmd->sg_mapped) 2483 qlt_unmap_sg(vha, cmd); 2484 2485 if (unlikely(status != CTIO_SUCCESS)) { 2486 switch (status & 0xFFFF) { 2487 case CTIO_LIP_RESET: 2488 case CTIO_TARGET_RESET: 2489 case CTIO_ABORTED: 2490 case CTIO_TIMEOUT: 2491 case CTIO_INVALID_RX_ID: 2492 /* They are OK */ 2493 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, 2494 "qla_target(%d): CTIO with " 2495 "status %#x received, state %x, se_cmd %p, " 2496 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " 2497 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, 2498 status, cmd->state, se_cmd); 2499 break; 2500 2501 case CTIO_PORT_LOGGED_OUT: 2502 case CTIO_PORT_UNAVAILABLE: 2503 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, 2504 "qla_target(%d): CTIO with PORT LOGGED " 2505 "OUT (29) or PORT UNAVAILABLE (28) status %x " 2506 "received (state %x, se_cmd %p)\n", vha->vp_idx, 2507 status, cmd->state, se_cmd); 2508 break; 2509 2510 case CTIO_SRR_RECEIVED: 2511 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, 2512 "qla_target(%d): CTIO with SRR_RECEIVED" 2513 " status %x received (state %x, se_cmd %p)\n", 2514 vha->vp_idx, status, cmd->state, se_cmd); 2515 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) 2516 break; 2517 else 2518 return; 2519 2520 default: 2521 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, 2522 "qla_target(%d): CTIO with error status " 2523 "0x%x received (state %x, se_cmd %p\n", 2524 vha->vp_idx, status, cmd->state, se_cmd); 2525 break; 2526 } 2527 2528 if (cmd->state != QLA_TGT_STATE_NEED_DATA) 2529 if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) 2530 return; 2531 } 2532 2533 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 2534 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd); 2535 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 2536 int rx_status = 0; 2537 2538 cmd->state = QLA_TGT_STATE_DATA_IN; 2539 2540 if (unlikely(status != CTIO_SUCCESS)) 2541 rx_status = -EIO; 2542 else 2543 cmd->write_data_transferred = 1; 2544 2545 ql_dbg(ql_dbg_tgt, vha, 0xe020, 2546 "Data received, context %x, rx_status %d\n", 2547 0x0, rx_status); 2548 2549 ha->tgt.tgt_ops->handle_data(cmd); 2550 return; 2551 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 2552 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, 2553 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag); 2554 } else { 2555 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, 2556 "qla_target(%d): A command in state (%d) should " 2557 "not return a CTIO complete\n", vha->vp_idx, cmd->state); 2558 } 2559 2560 if (unlikely(status != CTIO_SUCCESS)) { 2561 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); 2562 dump_stack(); 2563 } 2564 2565 ha->tgt.tgt_ops->free_cmd(cmd); 2566 } 2567 2568 /* ha->hardware_lock supposed to be held on entry */ 2569 /* called via callback from qla2xxx */ 2570 void qlt_ctio_completion(struct scsi_qla_host *vha, uint32_t handle) 2571 { 2572 struct qla_hw_data *ha = vha->hw; 2573 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2574 2575 if (likely(tgt == NULL)) { 2576 ql_dbg(ql_dbg_tgt, vha, 0xe021, 2577 "CTIO, but target mode not enabled" 2578 " (ha %d %p handle %#x)", vha->vp_idx, ha, handle); 2579 return; 2580 } 2581 2582 tgt->irq_cmd_count++; 2583 qlt_do_ctio_completion(vha, handle, CTIO_SUCCESS, NULL); 2584 tgt->irq_cmd_count--; 2585 } 2586 2587 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, 2588 uint8_t task_codes) 2589 { 2590 int fcp_task_attr; 2591 2592 switch (task_codes) { 2593 case ATIO_SIMPLE_QUEUE: 2594 fcp_task_attr = MSG_SIMPLE_TAG; 2595 break; 2596 case ATIO_HEAD_OF_QUEUE: 2597 fcp_task_attr = MSG_HEAD_TAG; 2598 break; 2599 case ATIO_ORDERED_QUEUE: 2600 fcp_task_attr = MSG_ORDERED_TAG; 2601 break; 2602 case ATIO_ACA_QUEUE: 2603 fcp_task_attr = MSG_ACA_TAG; 2604 break; 2605 case ATIO_UNTAGGED: 2606 fcp_task_attr = MSG_SIMPLE_TAG; 2607 break; 2608 default: 2609 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, 2610 "qla_target: unknown task code %x, use ORDERED instead\n", 2611 task_codes); 2612 fcp_task_attr = MSG_ORDERED_TAG; 2613 break; 2614 } 2615 2616 return fcp_task_attr; 2617 } 2618 2619 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, 2620 uint8_t *); 2621 /* 2622 * Process context for I/O path into tcm_qla2xxx code 2623 */ 2624 static void qlt_do_work(struct work_struct *work) 2625 { 2626 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 2627 scsi_qla_host_t *vha = cmd->vha; 2628 struct qla_hw_data *ha = vha->hw; 2629 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2630 struct qla_tgt_sess *sess = NULL; 2631 struct atio_from_isp *atio = &cmd->atio; 2632 unsigned char *cdb; 2633 unsigned long flags; 2634 uint32_t data_length; 2635 int ret, fcp_task_attr, data_dir, bidi = 0; 2636 2637 if (tgt->tgt_stop) 2638 goto out_term; 2639 2640 spin_lock_irqsave(&ha->hardware_lock, flags); 2641 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 2642 atio->u.isp24.fcp_hdr.s_id); 2643 /* Do kref_get() before dropping qla_hw_data->hardware_lock. */ 2644 if (sess) 2645 kref_get(&sess->se_sess->sess_kref); 2646 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2647 2648 if (unlikely(!sess)) { 2649 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id; 2650 2651 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, 2652 "qla_target(%d): Unable to find wwn login" 2653 " (s_id %x:%x:%x), trying to create it manually\n", 2654 vha->vp_idx, s_id[0], s_id[1], s_id[2]); 2655 2656 if (atio->u.raw.entry_count > 1) { 2657 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, 2658 "Dropping multy entry cmd %p\n", cmd); 2659 goto out_term; 2660 } 2661 2662 mutex_lock(&ha->tgt.tgt_mutex); 2663 sess = qlt_make_local_sess(vha, s_id); 2664 /* sess has an extra creation ref. */ 2665 mutex_unlock(&ha->tgt.tgt_mutex); 2666 2667 if (!sess) 2668 goto out_term; 2669 } 2670 2671 cmd->sess = sess; 2672 cmd->loop_id = sess->loop_id; 2673 cmd->conf_compl_supported = sess->conf_compl_supported; 2674 2675 cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; 2676 cmd->tag = atio->u.isp24.exchange_addr; 2677 cmd->unpacked_lun = scsilun_to_int( 2678 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); 2679 2680 if (atio->u.isp24.fcp_cmnd.rddata && 2681 atio->u.isp24.fcp_cmnd.wrdata) { 2682 bidi = 1; 2683 data_dir = DMA_TO_DEVICE; 2684 } else if (atio->u.isp24.fcp_cmnd.rddata) 2685 data_dir = DMA_FROM_DEVICE; 2686 else if (atio->u.isp24.fcp_cmnd.wrdata) 2687 data_dir = DMA_TO_DEVICE; 2688 else 2689 data_dir = DMA_NONE; 2690 2691 fcp_task_attr = qlt_get_fcp_task_attr(vha, 2692 atio->u.isp24.fcp_cmnd.task_attr); 2693 data_length = be32_to_cpu(get_unaligned((uint32_t *) 2694 &atio->u.isp24.fcp_cmnd.add_cdb[ 2695 atio->u.isp24.fcp_cmnd.add_cdb_len])); 2696 2697 ql_dbg(ql_dbg_tgt, vha, 0xe022, 2698 "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n", 2699 cmd, cmd->unpacked_lun, cmd->tag); 2700 2701 ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, 2702 fcp_task_attr, data_dir, bidi); 2703 if (ret != 0) 2704 goto out_term; 2705 /* 2706 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( 2707 */ 2708 ha->tgt.tgt_ops->put_sess(sess); 2709 return; 2710 2711 out_term: 2712 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd); 2713 /* 2714 * cmd has not sent to target yet, so pass NULL as the second 2715 * argument to qlt_send_term_exchange() and free the memory here. 2716 */ 2717 spin_lock_irqsave(&ha->hardware_lock, flags); 2718 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1); 2719 kmem_cache_free(qla_tgt_cmd_cachep, cmd); 2720 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2721 if (sess) 2722 ha->tgt.tgt_ops->put_sess(sess); 2723 } 2724 2725 /* ha->hardware_lock supposed to be held on entry */ 2726 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, 2727 struct atio_from_isp *atio) 2728 { 2729 struct qla_hw_data *ha = vha->hw; 2730 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2731 struct qla_tgt_cmd *cmd; 2732 2733 if (unlikely(tgt->tgt_stop)) { 2734 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021, 2735 "New command while device %p is shutting down\n", tgt); 2736 return -EFAULT; 2737 } 2738 2739 cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC); 2740 if (!cmd) { 2741 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e, 2742 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); 2743 return -ENOMEM; 2744 } 2745 2746 INIT_LIST_HEAD(&cmd->cmd_list); 2747 2748 memcpy(&cmd->atio, atio, sizeof(*atio)); 2749 cmd->state = QLA_TGT_STATE_NEW; 2750 cmd->tgt = ha->tgt.qla_tgt; 2751 cmd->vha = vha; 2752 2753 INIT_WORK(&cmd->work, qlt_do_work); 2754 queue_work(qla_tgt_wq, &cmd->work); 2755 return 0; 2756 2757 } 2758 2759 /* ha->hardware_lock supposed to be held on entry */ 2760 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 2761 int fn, void *iocb, int flags) 2762 { 2763 struct scsi_qla_host *vha = sess->vha; 2764 struct qla_hw_data *ha = vha->hw; 2765 struct qla_tgt_mgmt_cmd *mcmd; 2766 int res; 2767 uint8_t tmr_func; 2768 2769 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 2770 if (!mcmd) { 2771 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, 2772 "qla_target(%d): Allocation of management " 2773 "command failed, some commands and their data could " 2774 "leak\n", vha->vp_idx); 2775 return -ENOMEM; 2776 } 2777 memset(mcmd, 0, sizeof(*mcmd)); 2778 mcmd->sess = sess; 2779 2780 if (iocb) { 2781 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 2782 sizeof(mcmd->orig_iocb.imm_ntfy)); 2783 } 2784 mcmd->tmr_func = fn; 2785 mcmd->flags = flags; 2786 2787 switch (fn) { 2788 case QLA_TGT_CLEAR_ACA: 2789 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, 2790 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); 2791 tmr_func = TMR_CLEAR_ACA; 2792 break; 2793 2794 case QLA_TGT_TARGET_RESET: 2795 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, 2796 "qla_target(%d): TARGET_RESET received\n", 2797 sess->vha->vp_idx); 2798 tmr_func = TMR_TARGET_WARM_RESET; 2799 break; 2800 2801 case QLA_TGT_LUN_RESET: 2802 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, 2803 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); 2804 tmr_func = TMR_LUN_RESET; 2805 break; 2806 2807 case QLA_TGT_CLEAR_TS: 2808 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, 2809 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); 2810 tmr_func = TMR_CLEAR_TASK_SET; 2811 break; 2812 2813 case QLA_TGT_ABORT_TS: 2814 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, 2815 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); 2816 tmr_func = TMR_ABORT_TASK_SET; 2817 break; 2818 #if 0 2819 case QLA_TGT_ABORT_ALL: 2820 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, 2821 "qla_target(%d): Doing ABORT_ALL_TASKS\n", 2822 sess->vha->vp_idx); 2823 tmr_func = 0; 2824 break; 2825 2826 case QLA_TGT_ABORT_ALL_SESS: 2827 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, 2828 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", 2829 sess->vha->vp_idx); 2830 tmr_func = 0; 2831 break; 2832 2833 case QLA_TGT_NEXUS_LOSS_SESS: 2834 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, 2835 "qla_target(%d): Doing NEXUS_LOSS_SESS\n", 2836 sess->vha->vp_idx); 2837 tmr_func = 0; 2838 break; 2839 2840 case QLA_TGT_NEXUS_LOSS: 2841 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, 2842 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); 2843 tmr_func = 0; 2844 break; 2845 #endif 2846 default: 2847 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, 2848 "qla_target(%d): Unknown task mgmt fn 0x%x\n", 2849 sess->vha->vp_idx, fn); 2850 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 2851 return -ENOSYS; 2852 } 2853 2854 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); 2855 if (res != 0) { 2856 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, 2857 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", 2858 sess->vha->vp_idx, res); 2859 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 2860 return -EFAULT; 2861 } 2862 2863 return 0; 2864 } 2865 2866 /* ha->hardware_lock supposed to be held on entry */ 2867 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) 2868 { 2869 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 2870 struct qla_hw_data *ha = vha->hw; 2871 struct qla_tgt *tgt; 2872 struct qla_tgt_sess *sess; 2873 uint32_t lun, unpacked_lun; 2874 int lun_size, fn; 2875 2876 tgt = ha->tgt.qla_tgt; 2877 2878 lun = a->u.isp24.fcp_cmnd.lun; 2879 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun); 2880 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 2881 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 2882 a->u.isp24.fcp_hdr.s_id); 2883 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 2884 2885 if (!sess) { 2886 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, 2887 "qla_target(%d): task mgmt fn 0x%x for " 2888 "non-existant session\n", vha->vp_idx, fn); 2889 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, 2890 sizeof(struct atio_from_isp)); 2891 } 2892 2893 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 2894 } 2895 2896 /* ha->hardware_lock supposed to be held on entry */ 2897 static int __qlt_abort_task(struct scsi_qla_host *vha, 2898 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) 2899 { 2900 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 2901 struct qla_hw_data *ha = vha->hw; 2902 struct qla_tgt_mgmt_cmd *mcmd; 2903 uint32_t lun, unpacked_lun; 2904 int rc; 2905 2906 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 2907 if (mcmd == NULL) { 2908 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, 2909 "qla_target(%d): %s: Allocation of ABORT cmd failed\n", 2910 vha->vp_idx, __func__); 2911 return -ENOMEM; 2912 } 2913 memset(mcmd, 0, sizeof(*mcmd)); 2914 2915 mcmd->sess = sess; 2916 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 2917 sizeof(mcmd->orig_iocb.imm_ntfy)); 2918 2919 lun = a->u.isp24.fcp_cmnd.lun; 2920 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 2921 2922 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, 2923 le16_to_cpu(iocb->u.isp2x.seq_id)); 2924 if (rc != 0) { 2925 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, 2926 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", 2927 vha->vp_idx, rc); 2928 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 2929 return -EFAULT; 2930 } 2931 2932 return 0; 2933 } 2934 2935 /* ha->hardware_lock supposed to be held on entry */ 2936 static int qlt_abort_task(struct scsi_qla_host *vha, 2937 struct imm_ntfy_from_isp *iocb) 2938 { 2939 struct qla_hw_data *ha = vha->hw; 2940 struct qla_tgt_sess *sess; 2941 int loop_id; 2942 2943 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); 2944 2945 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 2946 if (sess == NULL) { 2947 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, 2948 "qla_target(%d): task abort for unexisting " 2949 "session\n", vha->vp_idx); 2950 return qlt_sched_sess_work(ha->tgt.qla_tgt, 2951 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); 2952 } 2953 2954 return __qlt_abort_task(vha, iocb, sess); 2955 } 2956 2957 /* 2958 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2959 */ 2960 static int qlt_24xx_handle_els(struct scsi_qla_host *vha, 2961 struct imm_ntfy_from_isp *iocb) 2962 { 2963 struct qla_hw_data *ha = vha->hw; 2964 int res = 0; 2965 2966 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, 2967 "qla_target(%d): Port ID: 0x%02x:%02x:%02x" 2968 " ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0], 2969 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2], 2970 iocb->u.isp24.status_subcode); 2971 2972 switch (iocb->u.isp24.status_subcode) { 2973 case ELS_PLOGI: 2974 case ELS_FLOGI: 2975 case ELS_PRLI: 2976 case ELS_LOGO: 2977 case ELS_PRLO: 2978 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 2979 break; 2980 case ELS_PDISC: 2981 case ELS_ADISC: 2982 { 2983 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2984 if (tgt->link_reinit_iocb_pending) { 2985 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 2986 0, 0, 0, 0, 0, 0); 2987 tgt->link_reinit_iocb_pending = 0; 2988 } 2989 res = 1; /* send notify ack */ 2990 break; 2991 } 2992 2993 default: 2994 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, 2995 "qla_target(%d): Unsupported ELS command %x " 2996 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); 2997 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 2998 break; 2999 } 3000 3001 return res; 3002 } 3003 3004 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) 3005 { 3006 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; 3007 size_t first_offset = 0, rem_offset = offset, tmp = 0; 3008 int i, sg_srr_cnt, bufflen = 0; 3009 3010 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, 3011 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " 3012 "cmd->sg_cnt: %u, direction: %d\n", 3013 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 3014 3015 /* 3016 * FIXME: Reject non zero SRR relative offset until we can test 3017 * this code properly. 3018 */ 3019 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); 3020 return -1; 3021 3022 if (!cmd->sg || !cmd->sg_cnt) { 3023 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, 3024 "Missing cmd->sg or zero cmd->sg_cnt in" 3025 " qla_tgt_set_data_offset\n"); 3026 return -EINVAL; 3027 } 3028 /* 3029 * Walk the current cmd->sg list until we locate the new sg_srr_start 3030 */ 3031 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { 3032 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, 3033 "sg[%d]: %p page: %p, length: %d, offset: %d\n", 3034 i, sg, sg_page(sg), sg->length, sg->offset); 3035 3036 if ((sg->length + tmp) > offset) { 3037 first_offset = rem_offset; 3038 sg_srr_start = sg; 3039 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, 3040 "Found matching sg[%d], using %p as sg_srr_start, " 3041 "and using first_offset: %zu\n", i, sg, 3042 first_offset); 3043 break; 3044 } 3045 tmp += sg->length; 3046 rem_offset -= sg->length; 3047 } 3048 3049 if (!sg_srr_start) { 3050 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, 3051 "Unable to locate sg_srr_start for offset: %u\n", offset); 3052 return -EINVAL; 3053 } 3054 sg_srr_cnt = (cmd->sg_cnt - i); 3055 3056 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); 3057 if (!sg_srr) { 3058 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, 3059 "Unable to allocate sgp\n"); 3060 return -ENOMEM; 3061 } 3062 sg_init_table(sg_srr, sg_srr_cnt); 3063 sgp = &sg_srr[0]; 3064 /* 3065 * Walk the remaining list for sg_srr_start, mapping to the newly 3066 * allocated sg_srr taking first_offset into account. 3067 */ 3068 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { 3069 if (first_offset) { 3070 sg_set_page(sgp, sg_page(sg), 3071 (sg->length - first_offset), first_offset); 3072 first_offset = 0; 3073 } else { 3074 sg_set_page(sgp, sg_page(sg), sg->length, 0); 3075 } 3076 bufflen += sgp->length; 3077 3078 sgp = sg_next(sgp); 3079 if (!sgp) 3080 break; 3081 } 3082 3083 cmd->sg = sg_srr; 3084 cmd->sg_cnt = sg_srr_cnt; 3085 cmd->bufflen = bufflen; 3086 cmd->offset += offset; 3087 cmd->free_sg = 1; 3088 3089 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); 3090 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", 3091 cmd->sg_cnt); 3092 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", 3093 cmd->bufflen); 3094 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", 3095 cmd->offset); 3096 3097 if (cmd->sg_cnt < 0) 3098 BUG(); 3099 3100 if (cmd->bufflen < 0) 3101 BUG(); 3102 3103 return 0; 3104 } 3105 3106 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd, 3107 uint32_t srr_rel_offs, int *xmit_type) 3108 { 3109 int res = 0, rel_offs; 3110 3111 rel_offs = srr_rel_offs - cmd->offset; 3112 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d", 3113 srr_rel_offs, rel_offs); 3114 3115 *xmit_type = QLA_TGT_XMIT_ALL; 3116 3117 if (rel_offs < 0) { 3118 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062, 3119 "qla_target(%d): SRR rel_offs (%d) < 0", 3120 cmd->vha->vp_idx, rel_offs); 3121 res = -1; 3122 } else if (rel_offs == cmd->bufflen) 3123 *xmit_type = QLA_TGT_XMIT_STATUS; 3124 else if (rel_offs > 0) 3125 res = qlt_set_data_offset(cmd, rel_offs); 3126 3127 return res; 3128 } 3129 3130 /* No locks, thread context */ 3131 static void qlt_handle_srr(struct scsi_qla_host *vha, 3132 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm) 3133 { 3134 struct imm_ntfy_from_isp *ntfy = 3135 (struct imm_ntfy_from_isp *)&imm->imm_ntfy; 3136 struct qla_hw_data *ha = vha->hw; 3137 struct qla_tgt_cmd *cmd = sctio->cmd; 3138 struct se_cmd *se_cmd = &cmd->se_cmd; 3139 unsigned long flags; 3140 int xmit_type = 0, resp = 0; 3141 uint32_t offset; 3142 uint16_t srr_ui; 3143 3144 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); 3145 srr_ui = ntfy->u.isp24.srr_ui; 3146 3147 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n", 3148 cmd, srr_ui); 3149 3150 switch (srr_ui) { 3151 case SRR_IU_STATUS: 3152 spin_lock_irqsave(&ha->hardware_lock, flags); 3153 qlt_send_notify_ack(vha, ntfy, 3154 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3155 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3156 xmit_type = QLA_TGT_XMIT_STATUS; 3157 resp = 1; 3158 break; 3159 case SRR_IU_DATA_IN: 3160 if (!cmd->sg || !cmd->sg_cnt) { 3161 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063, 3162 "Unable to process SRR_IU_DATA_IN due to" 3163 " missing cmd->sg, state: %d\n", cmd->state); 3164 dump_stack(); 3165 goto out_reject; 3166 } 3167 if (se_cmd->scsi_status != 0) { 3168 ql_dbg(ql_dbg_tgt, vha, 0xe02a, 3169 "Rejecting SRR_IU_DATA_IN with non GOOD " 3170 "scsi_status\n"); 3171 goto out_reject; 3172 } 3173 cmd->bufflen = se_cmd->data_length; 3174 3175 if (qlt_has_data(cmd)) { 3176 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3177 goto out_reject; 3178 spin_lock_irqsave(&ha->hardware_lock, flags); 3179 qlt_send_notify_ack(vha, ntfy, 3180 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3181 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3182 resp = 1; 3183 } else { 3184 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064, 3185 "qla_target(%d): SRR for in data for cmd " 3186 "without them (tag %d, SCSI status %d), " 3187 "reject", vha->vp_idx, cmd->tag, 3188 cmd->se_cmd.scsi_status); 3189 goto out_reject; 3190 } 3191 break; 3192 case SRR_IU_DATA_OUT: 3193 if (!cmd->sg || !cmd->sg_cnt) { 3194 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, 3195 "Unable to process SRR_IU_DATA_OUT due to" 3196 " missing cmd->sg\n"); 3197 dump_stack(); 3198 goto out_reject; 3199 } 3200 if (se_cmd->scsi_status != 0) { 3201 ql_dbg(ql_dbg_tgt, vha, 0xe02b, 3202 "Rejecting SRR_IU_DATA_OUT" 3203 " with non GOOD scsi_status\n"); 3204 goto out_reject; 3205 } 3206 cmd->bufflen = se_cmd->data_length; 3207 3208 if (qlt_has_data(cmd)) { 3209 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3210 goto out_reject; 3211 spin_lock_irqsave(&ha->hardware_lock, flags); 3212 qlt_send_notify_ack(vha, ntfy, 3213 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3214 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3215 if (xmit_type & QLA_TGT_XMIT_DATA) 3216 qlt_rdy_to_xfer(cmd); 3217 } else { 3218 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, 3219 "qla_target(%d): SRR for out data for cmd " 3220 "without them (tag %d, SCSI status %d), " 3221 "reject", vha->vp_idx, cmd->tag, 3222 cmd->se_cmd.scsi_status); 3223 goto out_reject; 3224 } 3225 break; 3226 default: 3227 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, 3228 "qla_target(%d): Unknown srr_ui value %x", 3229 vha->vp_idx, srr_ui); 3230 goto out_reject; 3231 } 3232 3233 /* Transmit response in case of status and data-in cases */ 3234 if (resp) 3235 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 3236 3237 return; 3238 3239 out_reject: 3240 spin_lock_irqsave(&ha->hardware_lock, flags); 3241 qlt_send_notify_ack(vha, ntfy, 0, 0, 0, 3242 NOTIFY_ACK_SRR_FLAGS_REJECT, 3243 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3244 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3245 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3246 cmd->state = QLA_TGT_STATE_DATA_IN; 3247 dump_stack(); 3248 } else 3249 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 3250 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3251 } 3252 3253 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, 3254 struct qla_tgt_srr_imm *imm, int ha_locked) 3255 { 3256 struct qla_hw_data *ha = vha->hw; 3257 unsigned long flags = 0; 3258 3259 if (!ha_locked) 3260 spin_lock_irqsave(&ha->hardware_lock, flags); 3261 3262 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, 3263 NOTIFY_ACK_SRR_FLAGS_REJECT, 3264 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3265 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3266 3267 if (!ha_locked) 3268 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3269 3270 kfree(imm); 3271 } 3272 3273 static void qlt_handle_srr_work(struct work_struct *work) 3274 { 3275 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); 3276 struct scsi_qla_host *vha = tgt->vha; 3277 struct qla_tgt_srr_ctio *sctio; 3278 unsigned long flags; 3279 3280 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", 3281 tgt); 3282 3283 restart: 3284 spin_lock_irqsave(&tgt->srr_lock, flags); 3285 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { 3286 struct qla_tgt_srr_imm *imm, *i, *ti; 3287 struct qla_tgt_cmd *cmd; 3288 struct se_cmd *se_cmd; 3289 3290 imm = NULL; 3291 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, 3292 srr_list_entry) { 3293 if (i->srr_id == sctio->srr_id) { 3294 list_del(&i->srr_list_entry); 3295 if (imm) { 3296 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, 3297 "qla_target(%d): There must be " 3298 "only one IMM SRR per CTIO SRR " 3299 "(IMM SRR %p, id %d, CTIO %p\n", 3300 vha->vp_idx, i, i->srr_id, sctio); 3301 qlt_reject_free_srr_imm(tgt->vha, i, 0); 3302 } else 3303 imm = i; 3304 } 3305 } 3306 3307 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, 3308 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, 3309 sctio->srr_id); 3310 3311 if (imm == NULL) { 3312 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, 3313 "Not found matching IMM for SRR CTIO (id %d)\n", 3314 sctio->srr_id); 3315 continue; 3316 } else 3317 list_del(&sctio->srr_list_entry); 3318 3319 spin_unlock_irqrestore(&tgt->srr_lock, flags); 3320 3321 cmd = sctio->cmd; 3322 /* 3323 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow 3324 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() 3325 * logic.. 3326 */ 3327 cmd->offset = 0; 3328 if (cmd->free_sg) { 3329 kfree(cmd->sg); 3330 cmd->sg = NULL; 3331 cmd->free_sg = 0; 3332 } 3333 se_cmd = &cmd->se_cmd; 3334 3335 cmd->sg_cnt = se_cmd->t_data_nents; 3336 cmd->sg = se_cmd->t_data_sg; 3337 3338 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, 3339 "SRR cmd %p (se_cmd %p, tag %d, op %x), " 3340 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag, 3341 se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset); 3342 3343 qlt_handle_srr(vha, sctio, imm); 3344 3345 kfree(imm); 3346 kfree(sctio); 3347 goto restart; 3348 } 3349 spin_unlock_irqrestore(&tgt->srr_lock, flags); 3350 } 3351 3352 /* ha->hardware_lock supposed to be held on entry */ 3353 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, 3354 struct imm_ntfy_from_isp *iocb) 3355 { 3356 struct qla_tgt_srr_imm *imm; 3357 struct qla_hw_data *ha = vha->hw; 3358 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3359 struct qla_tgt_srr_ctio *sctio; 3360 3361 tgt->imm_srr_id++; 3362 3363 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n", 3364 vha->vp_idx); 3365 3366 imm = kzalloc(sizeof(*imm), GFP_ATOMIC); 3367 if (imm != NULL) { 3368 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); 3369 3370 /* IRQ is already OFF */ 3371 spin_lock(&tgt->srr_lock); 3372 imm->srr_id = tgt->imm_srr_id; 3373 list_add_tail(&imm->srr_list_entry, 3374 &tgt->srr_imm_list); 3375 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, 3376 "IMM NTFY SRR %p added (id %d, ui %x)\n", 3377 imm, imm->srr_id, iocb->u.isp24.srr_ui); 3378 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 3379 int found = 0; 3380 list_for_each_entry(sctio, &tgt->srr_ctio_list, 3381 srr_list_entry) { 3382 if (sctio->srr_id == imm->srr_id) { 3383 found = 1; 3384 break; 3385 } 3386 } 3387 if (found) { 3388 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", 3389 "Scheduling srr work\n"); 3390 schedule_work(&tgt->srr_work); 3391 } else { 3392 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, 3393 "qla_target(%d): imm_srr_id " 3394 "== ctio_srr_id (%d), but there is no " 3395 "corresponding SRR CTIO, deleting IMM " 3396 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, 3397 imm); 3398 list_del(&imm->srr_list_entry); 3399 3400 kfree(imm); 3401 3402 spin_unlock(&tgt->srr_lock); 3403 goto out_reject; 3404 } 3405 } 3406 spin_unlock(&tgt->srr_lock); 3407 } else { 3408 struct qla_tgt_srr_ctio *ts; 3409 3410 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, 3411 "qla_target(%d): Unable to allocate SRR IMM " 3412 "entry, SRR request will be rejected\n", vha->vp_idx); 3413 3414 /* IRQ is already OFF */ 3415 spin_lock(&tgt->srr_lock); 3416 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, 3417 srr_list_entry) { 3418 if (sctio->srr_id == tgt->imm_srr_id) { 3419 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, 3420 "CTIO SRR %p deleted (id %d)\n", 3421 sctio, sctio->srr_id); 3422 list_del(&sctio->srr_list_entry); 3423 qlt_send_term_exchange(vha, sctio->cmd, 3424 &sctio->cmd->atio, 1); 3425 kfree(sctio); 3426 } 3427 } 3428 spin_unlock(&tgt->srr_lock); 3429 goto out_reject; 3430 } 3431 3432 return; 3433 3434 out_reject: 3435 qlt_send_notify_ack(vha, iocb, 0, 0, 0, 3436 NOTIFY_ACK_SRR_FLAGS_REJECT, 3437 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3438 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3439 } 3440 3441 /* 3442 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3443 */ 3444 static void qlt_handle_imm_notify(struct scsi_qla_host *vha, 3445 struct imm_ntfy_from_isp *iocb) 3446 { 3447 struct qla_hw_data *ha = vha->hw; 3448 uint32_t add_flags = 0; 3449 int send_notify_ack = 1; 3450 uint16_t status; 3451 3452 status = le16_to_cpu(iocb->u.isp2x.status); 3453 switch (status) { 3454 case IMM_NTFY_LIP_RESET: 3455 { 3456 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, 3457 "qla_target(%d): LIP reset (loop %#x), subcode %x\n", 3458 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), 3459 iocb->u.isp24.status_subcode); 3460 3461 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 3462 send_notify_ack = 0; 3463 break; 3464 } 3465 3466 case IMM_NTFY_LIP_LINK_REINIT: 3467 { 3468 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3469 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, 3470 "qla_target(%d): LINK REINIT (loop %#x, " 3471 "subcode %x)\n", vha->vp_idx, 3472 le16_to_cpu(iocb->u.isp24.nport_handle), 3473 iocb->u.isp24.status_subcode); 3474 if (tgt->link_reinit_iocb_pending) { 3475 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 3476 0, 0, 0, 0, 0, 0); 3477 } 3478 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); 3479 tgt->link_reinit_iocb_pending = 1; 3480 /* 3481 * QLogic requires to wait after LINK REINIT for possible 3482 * PDISC or ADISC ELS commands 3483 */ 3484 send_notify_ack = 0; 3485 break; 3486 } 3487 3488 case IMM_NTFY_PORT_LOGOUT: 3489 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, 3490 "qla_target(%d): Port logout (loop " 3491 "%#x, subcode %x)\n", vha->vp_idx, 3492 le16_to_cpu(iocb->u.isp24.nport_handle), 3493 iocb->u.isp24.status_subcode); 3494 3495 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) 3496 send_notify_ack = 0; 3497 /* The sessions will be cleared in the callback, if needed */ 3498 break; 3499 3500 case IMM_NTFY_GLBL_TPRLO: 3501 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, 3502 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); 3503 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 3504 send_notify_ack = 0; 3505 /* The sessions will be cleared in the callback, if needed */ 3506 break; 3507 3508 case IMM_NTFY_PORT_CONFIG: 3509 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, 3510 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, 3511 status); 3512 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 3513 send_notify_ack = 0; 3514 /* The sessions will be cleared in the callback, if needed */ 3515 break; 3516 3517 case IMM_NTFY_GLBL_LOGO: 3518 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, 3519 "qla_target(%d): Link failure detected\n", 3520 vha->vp_idx); 3521 /* I_T nexus loss */ 3522 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 3523 send_notify_ack = 0; 3524 break; 3525 3526 case IMM_NTFY_IOCB_OVERFLOW: 3527 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, 3528 "qla_target(%d): Cannot provide requested " 3529 "capability (IOCB overflowed the immediate notify " 3530 "resource count)\n", vha->vp_idx); 3531 break; 3532 3533 case IMM_NTFY_ABORT_TASK: 3534 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, 3535 "qla_target(%d): Abort Task (S %08x I %#x -> " 3536 "L %#x)\n", vha->vp_idx, 3537 le16_to_cpu(iocb->u.isp2x.seq_id), 3538 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), 3539 le16_to_cpu(iocb->u.isp2x.lun)); 3540 if (qlt_abort_task(vha, iocb) == 0) 3541 send_notify_ack = 0; 3542 break; 3543 3544 case IMM_NTFY_RESOURCE: 3545 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, 3546 "qla_target(%d): Out of resources, host %ld\n", 3547 vha->vp_idx, vha->host_no); 3548 break; 3549 3550 case IMM_NTFY_MSG_RX: 3551 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, 3552 "qla_target(%d): Immediate notify task %x\n", 3553 vha->vp_idx, iocb->u.isp2x.task_flags); 3554 if (qlt_handle_task_mgmt(vha, iocb) == 0) 3555 send_notify_ack = 0; 3556 break; 3557 3558 case IMM_NTFY_ELS: 3559 if (qlt_24xx_handle_els(vha, iocb) == 0) 3560 send_notify_ack = 0; 3561 break; 3562 3563 case IMM_NTFY_SRR: 3564 qlt_prepare_srr_imm(vha, iocb); 3565 send_notify_ack = 0; 3566 break; 3567 3568 default: 3569 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, 3570 "qla_target(%d): Received unknown immediate " 3571 "notify status %x\n", vha->vp_idx, status); 3572 break; 3573 } 3574 3575 if (send_notify_ack) 3576 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); 3577 } 3578 3579 /* 3580 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3581 * This function sends busy to ISP 2xxx or 24xx. 3582 */ 3583 static void qlt_send_busy(struct scsi_qla_host *vha, 3584 struct atio_from_isp *atio, uint16_t status) 3585 { 3586 struct ctio7_to_24xx *ctio24; 3587 struct qla_hw_data *ha = vha->hw; 3588 request_t *pkt; 3589 struct qla_tgt_sess *sess = NULL; 3590 3591 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 3592 atio->u.isp24.fcp_hdr.s_id); 3593 if (!sess) { 3594 qlt_send_term_exchange(vha, NULL, atio, 1); 3595 return; 3596 } 3597 /* Sending marker isn't necessary, since we called from ISR */ 3598 3599 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 3600 if (!pkt) { 3601 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e, 3602 "qla_target(%d): %s failed: unable to allocate " 3603 "request packet", vha->vp_idx, __func__); 3604 return; 3605 } 3606 3607 pkt->entry_count = 1; 3608 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 3609 3610 ctio24 = (struct ctio7_to_24xx *)pkt; 3611 ctio24->entry_type = CTIO_TYPE7; 3612 ctio24->nport_handle = sess->loop_id; 3613 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 3614 ctio24->vp_index = vha->vp_idx; 3615 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 3616 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 3617 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 3618 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 3619 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 3620 __constant_cpu_to_le16( 3621 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | 3622 CTIO7_FLAGS_DONT_RET_CTIO); 3623 /* 3624 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, 3625 * if the explicit conformation is used. 3626 */ 3627 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 3628 ctio24->u.status1.scsi_status = cpu_to_le16(status); 3629 ctio24->u.status1.residual = get_unaligned((uint32_t *) 3630 &atio->u.isp24.fcp_cmnd.add_cdb[ 3631 atio->u.isp24.fcp_cmnd.add_cdb_len]); 3632 if (ctio24->u.status1.residual != 0) 3633 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 3634 3635 qla2x00_start_iocbs(vha, vha->req); 3636 } 3637 3638 /* ha->hardware_lock supposed to be held on entry */ 3639 /* called via callback from qla2xxx */ 3640 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, 3641 struct atio_from_isp *atio) 3642 { 3643 struct qla_hw_data *ha = vha->hw; 3644 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3645 int rc; 3646 3647 if (unlikely(tgt == NULL)) { 3648 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039, 3649 "ATIO pkt, but no tgt (ha %p)", ha); 3650 return; 3651 } 3652 ql_dbg(ql_dbg_tgt, vha, 0xe02c, 3653 "qla_target(%d): ATIO pkt %p: type %02x count %02x", 3654 vha->vp_idx, atio, atio->u.raw.entry_type, 3655 atio->u.raw.entry_count); 3656 /* 3657 * In tgt_stop mode we also should allow all requests to pass. 3658 * Otherwise, some commands can stuck. 3659 */ 3660 3661 tgt->irq_cmd_count++; 3662 3663 switch (atio->u.raw.entry_type) { 3664 case ATIO_TYPE7: 3665 ql_dbg(ql_dbg_tgt, vha, 0xe02d, 3666 "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, " 3667 "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n", 3668 vha->vp_idx, atio->u.isp24.fcp_cmnd.lun, 3669 atio->u.isp24.fcp_cmnd.rddata, 3670 atio->u.isp24.fcp_cmnd.wrdata, 3671 atio->u.isp24.fcp_cmnd.add_cdb_len, 3672 be32_to_cpu(get_unaligned((uint32_t *) 3673 &atio->u.isp24.fcp_cmnd.add_cdb[ 3674 atio->u.isp24.fcp_cmnd.add_cdb_len])), 3675 atio->u.isp24.fcp_hdr.s_id[0], 3676 atio->u.isp24.fcp_hdr.s_id[1], 3677 atio->u.isp24.fcp_hdr.s_id[2]); 3678 3679 if (unlikely(atio->u.isp24.exchange_addr == 3680 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { 3681 ql_dbg(ql_dbg_tgt, vha, 0xe058, 3682 "qla_target(%d): ATIO_TYPE7 " 3683 "received with UNKNOWN exchange address, " 3684 "sending QUEUE_FULL\n", vha->vp_idx); 3685 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); 3686 break; 3687 } 3688 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) 3689 rc = qlt_handle_cmd_for_atio(vha, atio); 3690 else 3691 rc = qlt_handle_task_mgmt(vha, atio); 3692 if (unlikely(rc != 0)) { 3693 if (rc == -ESRCH) { 3694 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 3695 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 3696 #else 3697 qlt_send_term_exchange(vha, NULL, atio, 1); 3698 #endif 3699 } else { 3700 if (tgt->tgt_stop) { 3701 ql_dbg(ql_dbg_tgt, vha, 0xe059, 3702 "qla_target: Unable to send " 3703 "command to target for req, " 3704 "ignoring.\n"); 3705 } else { 3706 ql_dbg(ql_dbg_tgt, vha, 0xe05a, 3707 "qla_target(%d): Unable to send " 3708 "command to target, sending BUSY " 3709 "status.\n", vha->vp_idx); 3710 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 3711 } 3712 } 3713 } 3714 break; 3715 3716 case IMMED_NOTIFY_TYPE: 3717 { 3718 if (unlikely(atio->u.isp2x.entry_status != 0)) { 3719 ql_dbg(ql_dbg_tgt, vha, 0xe05b, 3720 "qla_target(%d): Received ATIO packet %x " 3721 "with error status %x\n", vha->vp_idx, 3722 atio->u.raw.entry_type, 3723 atio->u.isp2x.entry_status); 3724 break; 3725 } 3726 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); 3727 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); 3728 break; 3729 } 3730 3731 default: 3732 ql_dbg(ql_dbg_tgt, vha, 0xe05c, 3733 "qla_target(%d): Received unknown ATIO atio " 3734 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 3735 break; 3736 } 3737 3738 tgt->irq_cmd_count--; 3739 } 3740 3741 /* ha->hardware_lock supposed to be held on entry */ 3742 /* called via callback from qla2xxx */ 3743 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) 3744 { 3745 struct qla_hw_data *ha = vha->hw; 3746 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3747 3748 if (unlikely(tgt == NULL)) { 3749 ql_dbg(ql_dbg_tgt, vha, 0xe05d, 3750 "qla_target(%d): Response pkt %x received, but no " 3751 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); 3752 return; 3753 } 3754 3755 ql_dbg(ql_dbg_tgt, vha, 0xe02f, 3756 "qla_target(%d): response pkt %p: T %02x C %02x S %02x " 3757 "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type, 3758 pkt->entry_count, pkt->entry_status, pkt->handle); 3759 3760 /* 3761 * In tgt_stop mode we also should allow all requests to pass. 3762 * Otherwise, some commands can stuck. 3763 */ 3764 3765 tgt->irq_cmd_count++; 3766 3767 switch (pkt->entry_type) { 3768 case CTIO_TYPE7: 3769 { 3770 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 3771 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n", 3772 vha->vp_idx); 3773 qlt_do_ctio_completion(vha, entry->handle, 3774 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 3775 entry); 3776 break; 3777 } 3778 3779 case ACCEPT_TGT_IO_TYPE: 3780 { 3781 struct atio_from_isp *atio = (struct atio_from_isp *)pkt; 3782 int rc; 3783 ql_dbg(ql_dbg_tgt, vha, 0xe031, 3784 "ACCEPT_TGT_IO instance %d status %04x " 3785 "lun %04x read/write %d data_length %04x " 3786 "target_id %02x rx_id %04x\n ", vha->vp_idx, 3787 le16_to_cpu(atio->u.isp2x.status), 3788 le16_to_cpu(atio->u.isp2x.lun), 3789 atio->u.isp2x.execution_codes, 3790 le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha, 3791 atio), atio->u.isp2x.rx_id); 3792 if (atio->u.isp2x.status != 3793 __constant_cpu_to_le16(ATIO_CDB_VALID)) { 3794 ql_dbg(ql_dbg_tgt, vha, 0xe05e, 3795 "qla_target(%d): ATIO with error " 3796 "status %x received\n", vha->vp_idx, 3797 le16_to_cpu(atio->u.isp2x.status)); 3798 break; 3799 } 3800 ql_dbg(ql_dbg_tgt, vha, 0xe032, 3801 "FCP CDB: 0x%02x, sizeof(cdb): %lu", 3802 atio->u.isp2x.cdb[0], (unsigned long 3803 int)sizeof(atio->u.isp2x.cdb)); 3804 3805 rc = qlt_handle_cmd_for_atio(vha, atio); 3806 if (unlikely(rc != 0)) { 3807 if (rc == -ESRCH) { 3808 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 3809 qlt_send_busy(vha, atio, 0); 3810 #else 3811 qlt_send_term_exchange(vha, NULL, atio, 1); 3812 #endif 3813 } else { 3814 if (tgt->tgt_stop) { 3815 ql_dbg(ql_dbg_tgt, vha, 0xe05f, 3816 "qla_target: Unable to send " 3817 "command to target, sending TERM " 3818 "EXCHANGE for rsp\n"); 3819 qlt_send_term_exchange(vha, NULL, 3820 atio, 1); 3821 } else { 3822 ql_dbg(ql_dbg_tgt, vha, 0xe060, 3823 "qla_target(%d): Unable to send " 3824 "command to target, sending BUSY " 3825 "status\n", vha->vp_idx); 3826 qlt_send_busy(vha, atio, 0); 3827 } 3828 } 3829 } 3830 } 3831 break; 3832 3833 case CONTINUE_TGT_IO_TYPE: 3834 { 3835 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 3836 ql_dbg(ql_dbg_tgt, vha, 0xe033, 3837 "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx); 3838 qlt_do_ctio_completion(vha, entry->handle, 3839 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 3840 entry); 3841 break; 3842 } 3843 3844 case CTIO_A64_TYPE: 3845 { 3846 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 3847 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n", 3848 vha->vp_idx); 3849 qlt_do_ctio_completion(vha, entry->handle, 3850 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 3851 entry); 3852 break; 3853 } 3854 3855 case IMMED_NOTIFY_TYPE: 3856 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); 3857 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); 3858 break; 3859 3860 case NOTIFY_ACK_TYPE: 3861 if (tgt->notify_ack_expected > 0) { 3862 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 3863 ql_dbg(ql_dbg_tgt, vha, 0xe036, 3864 "NOTIFY_ACK seq %08x status %x\n", 3865 le16_to_cpu(entry->u.isp2x.seq_id), 3866 le16_to_cpu(entry->u.isp2x.status)); 3867 tgt->notify_ack_expected--; 3868 if (entry->u.isp2x.status != 3869 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) { 3870 ql_dbg(ql_dbg_tgt, vha, 0xe061, 3871 "qla_target(%d): NOTIFY_ACK " 3872 "failed %x\n", vha->vp_idx, 3873 le16_to_cpu(entry->u.isp2x.status)); 3874 } 3875 } else { 3876 ql_dbg(ql_dbg_tgt, vha, 0xe062, 3877 "qla_target(%d): Unexpected NOTIFY_ACK received\n", 3878 vha->vp_idx); 3879 } 3880 break; 3881 3882 case ABTS_RECV_24XX: 3883 ql_dbg(ql_dbg_tgt, vha, 0xe037, 3884 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); 3885 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); 3886 break; 3887 3888 case ABTS_RESP_24XX: 3889 if (tgt->abts_resp_expected > 0) { 3890 struct abts_resp_from_24xx_fw *entry = 3891 (struct abts_resp_from_24xx_fw *)pkt; 3892 ql_dbg(ql_dbg_tgt, vha, 0xe038, 3893 "ABTS_RESP_24XX: compl_status %x\n", 3894 entry->compl_status); 3895 tgt->abts_resp_expected--; 3896 if (le16_to_cpu(entry->compl_status) != 3897 ABTS_RESP_COMPL_SUCCESS) { 3898 if ((entry->error_subcode1 == 0x1E) && 3899 (entry->error_subcode2 == 0)) { 3900 /* 3901 * We've got a race here: aborted 3902 * exchange not terminated, i.e. 3903 * response for the aborted command was 3904 * sent between the abort request was 3905 * received and processed. 3906 * Unfortunately, the firmware has a 3907 * silly requirement that all aborted 3908 * exchanges must be explicitely 3909 * terminated, otherwise it refuses to 3910 * send responses for the abort 3911 * requests. So, we have to 3912 * (re)terminate the exchange and retry 3913 * the abort response. 3914 */ 3915 qlt_24xx_retry_term_exchange(vha, 3916 entry); 3917 } else 3918 ql_dbg(ql_dbg_tgt, vha, 0xe063, 3919 "qla_target(%d): ABTS_RESP_24XX " 3920 "failed %x (subcode %x:%x)", 3921 vha->vp_idx, entry->compl_status, 3922 entry->error_subcode1, 3923 entry->error_subcode2); 3924 } 3925 } else { 3926 ql_dbg(ql_dbg_tgt, vha, 0xe064, 3927 "qla_target(%d): Unexpected ABTS_RESP_24XX " 3928 "received\n", vha->vp_idx); 3929 } 3930 break; 3931 3932 default: 3933 ql_dbg(ql_dbg_tgt, vha, 0xe065, 3934 "qla_target(%d): Received unknown response pkt " 3935 "type %x\n", vha->vp_idx, pkt->entry_type); 3936 break; 3937 } 3938 3939 tgt->irq_cmd_count--; 3940 } 3941 3942 /* 3943 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3944 */ 3945 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, 3946 uint16_t *mailbox) 3947 { 3948 struct qla_hw_data *ha = vha->hw; 3949 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3950 int login_code; 3951 3952 ql_dbg(ql_dbg_tgt, vha, 0xe039, 3953 "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n", 3954 vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done, 3955 ha->operating_mode, ha->current_topology); 3956 3957 if (!ha->tgt.tgt_ops) 3958 return; 3959 3960 if (unlikely(tgt == NULL)) { 3961 ql_dbg(ql_dbg_tgt, vha, 0xe03a, 3962 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); 3963 return; 3964 } 3965 3966 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && 3967 IS_QLA2100(ha)) 3968 return; 3969 /* 3970 * In tgt_stop mode we also should allow all requests to pass. 3971 * Otherwise, some commands can stuck. 3972 */ 3973 3974 tgt->irq_cmd_count++; 3975 3976 switch (code) { 3977 case MBA_RESET: /* Reset */ 3978 case MBA_SYSTEM_ERR: /* System Error */ 3979 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ 3980 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ 3981 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, 3982 "qla_target(%d): System error async event %#x " 3983 "occured", vha->vp_idx, code); 3984 break; 3985 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ 3986 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 3987 break; 3988 3989 case MBA_LOOP_UP: 3990 { 3991 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, 3992 "qla_target(%d): Async LOOP_UP occured " 3993 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 3994 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 3995 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 3996 if (tgt->link_reinit_iocb_pending) { 3997 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 3998 0, 0, 0, 0, 0, 0); 3999 tgt->link_reinit_iocb_pending = 0; 4000 } 4001 break; 4002 } 4003 4004 case MBA_LIP_OCCURRED: 4005 case MBA_LOOP_DOWN: 4006 case MBA_LIP_RESET: 4007 case MBA_RSCN_UPDATE: 4008 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, 4009 "qla_target(%d): Async event %#x occured " 4010 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, 4011 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4012 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4013 break; 4014 4015 case MBA_PORT_UPDATE: 4016 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, 4017 "qla_target(%d): Port update async event %#x " 4018 "occured: updating the ports database (m[0]=%x, m[1]=%x, " 4019 "m[2]=%x, m[3]=%x)", vha->vp_idx, code, 4020 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4021 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4022 4023 login_code = le16_to_cpu(mailbox[2]); 4024 if (login_code == 0x4) 4025 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, 4026 "Async MB 2: Got PLOGI Complete\n"); 4027 else if (login_code == 0x7) 4028 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, 4029 "Async MB 2: Port Logged Out\n"); 4030 break; 4031 4032 default: 4033 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040, 4034 "qla_target(%d): Async event %#x occured: " 4035 "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 4036 code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 4037 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 4038 break; 4039 } 4040 4041 tgt->irq_cmd_count--; 4042 } 4043 4044 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, 4045 uint16_t loop_id) 4046 { 4047 fc_port_t *fcport; 4048 int rc; 4049 4050 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 4051 if (!fcport) { 4052 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, 4053 "qla_target(%d): Allocation of tmp FC port failed", 4054 vha->vp_idx); 4055 return NULL; 4056 } 4057 4058 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id); 4059 4060 fcport->loop_id = loop_id; 4061 4062 rc = qla2x00_get_port_database(vha, fcport, 0); 4063 if (rc != QLA_SUCCESS) { 4064 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, 4065 "qla_target(%d): Failed to retrieve fcport " 4066 "information -- get_port_database() returned %x " 4067 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 4068 kfree(fcport); 4069 return NULL; 4070 } 4071 4072 return fcport; 4073 } 4074 4075 /* Must be called under tgt_mutex */ 4076 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, 4077 uint8_t *s_id) 4078 { 4079 struct qla_hw_data *ha = vha->hw; 4080 struct qla_tgt_sess *sess = NULL; 4081 fc_port_t *fcport = NULL; 4082 int rc, global_resets; 4083 uint16_t loop_id = 0; 4084 4085 retry: 4086 global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count); 4087 4088 rc = qla24xx_get_loop_id(vha, s_id, &loop_id); 4089 if (rc != 0) { 4090 if ((s_id[0] == 0xFF) && 4091 (s_id[1] == 0xFC)) { 4092 /* 4093 * This is Domain Controller, so it should be 4094 * OK to drop SCSI commands from it. 4095 */ 4096 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, 4097 "Unable to find initiator with S_ID %x:%x:%x", 4098 s_id[0], s_id[1], s_id[2]); 4099 } else 4100 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071, 4101 "qla_target(%d): Unable to find " 4102 "initiator with S_ID %x:%x:%x", 4103 vha->vp_idx, s_id[0], s_id[1], 4104 s_id[2]); 4105 return NULL; 4106 } 4107 4108 fcport = qlt_get_port_database(vha, loop_id); 4109 if (!fcport) 4110 return NULL; 4111 4112 if (global_resets != 4113 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) { 4114 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, 4115 "qla_target(%d): global reset during session discovery " 4116 "(counter was %d, new %d), retrying", vha->vp_idx, 4117 global_resets, 4118 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)); 4119 goto retry; 4120 } 4121 4122 sess = qlt_create_sess(vha, fcport, true); 4123 4124 kfree(fcport); 4125 return sess; 4126 } 4127 4128 static void qlt_abort_work(struct qla_tgt *tgt, 4129 struct qla_tgt_sess_work_param *prm) 4130 { 4131 struct scsi_qla_host *vha = tgt->vha; 4132 struct qla_hw_data *ha = vha->hw; 4133 struct qla_tgt_sess *sess = NULL; 4134 unsigned long flags; 4135 uint32_t be_s_id; 4136 uint8_t s_id[3]; 4137 int rc; 4138 4139 spin_lock_irqsave(&ha->hardware_lock, flags); 4140 4141 if (tgt->tgt_stop) 4142 goto out_term; 4143 4144 s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; 4145 s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; 4146 s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; 4147 4148 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 4149 (unsigned char *)&be_s_id); 4150 if (!sess) { 4151 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4152 4153 mutex_lock(&ha->tgt.tgt_mutex); 4154 sess = qlt_make_local_sess(vha, s_id); 4155 /* sess has got an extra creation ref */ 4156 mutex_unlock(&ha->tgt.tgt_mutex); 4157 4158 spin_lock_irqsave(&ha->hardware_lock, flags); 4159 if (!sess) 4160 goto out_term; 4161 } else { 4162 kref_get(&sess->se_sess->sess_kref); 4163 } 4164 4165 if (tgt->tgt_stop) 4166 goto out_term; 4167 4168 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); 4169 if (rc != 0) 4170 goto out_term; 4171 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4172 4173 ha->tgt.tgt_ops->put_sess(sess); 4174 return; 4175 4176 out_term: 4177 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); 4178 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4179 if (sess) 4180 ha->tgt.tgt_ops->put_sess(sess); 4181 } 4182 4183 static void qlt_tmr_work(struct qla_tgt *tgt, 4184 struct qla_tgt_sess_work_param *prm) 4185 { 4186 struct atio_from_isp *a = &prm->tm_iocb2; 4187 struct scsi_qla_host *vha = tgt->vha; 4188 struct qla_hw_data *ha = vha->hw; 4189 struct qla_tgt_sess *sess = NULL; 4190 unsigned long flags; 4191 uint8_t *s_id = NULL; /* to hide compiler warnings */ 4192 int rc; 4193 uint32_t lun, unpacked_lun; 4194 int lun_size, fn; 4195 void *iocb; 4196 4197 spin_lock_irqsave(&ha->hardware_lock, flags); 4198 4199 if (tgt->tgt_stop) 4200 goto out_term; 4201 4202 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; 4203 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 4204 if (!sess) { 4205 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4206 4207 mutex_lock(&ha->tgt.tgt_mutex); 4208 sess = qlt_make_local_sess(vha, s_id); 4209 /* sess has got an extra creation ref */ 4210 mutex_unlock(&ha->tgt.tgt_mutex); 4211 4212 spin_lock_irqsave(&ha->hardware_lock, flags); 4213 if (!sess) 4214 goto out_term; 4215 } else { 4216 kref_get(&sess->se_sess->sess_kref); 4217 } 4218 4219 iocb = a; 4220 lun = a->u.isp24.fcp_cmnd.lun; 4221 lun_size = sizeof(lun); 4222 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 4223 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 4224 4225 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 4226 if (rc != 0) 4227 goto out_term; 4228 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4229 4230 ha->tgt.tgt_ops->put_sess(sess); 4231 return; 4232 4233 out_term: 4234 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1); 4235 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4236 if (sess) 4237 ha->tgt.tgt_ops->put_sess(sess); 4238 } 4239 4240 static void qlt_sess_work_fn(struct work_struct *work) 4241 { 4242 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); 4243 struct scsi_qla_host *vha = tgt->vha; 4244 unsigned long flags; 4245 4246 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); 4247 4248 spin_lock_irqsave(&tgt->sess_work_lock, flags); 4249 while (!list_empty(&tgt->sess_works_list)) { 4250 struct qla_tgt_sess_work_param *prm = list_entry( 4251 tgt->sess_works_list.next, typeof(*prm), 4252 sess_works_list_entry); 4253 4254 /* 4255 * This work can be scheduled on several CPUs at time, so we 4256 * must delete the entry to eliminate double processing 4257 */ 4258 list_del(&prm->sess_works_list_entry); 4259 4260 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 4261 4262 switch (prm->type) { 4263 case QLA_TGT_SESS_WORK_ABORT: 4264 qlt_abort_work(tgt, prm); 4265 break; 4266 case QLA_TGT_SESS_WORK_TM: 4267 qlt_tmr_work(tgt, prm); 4268 break; 4269 default: 4270 BUG_ON(1); 4271 break; 4272 } 4273 4274 spin_lock_irqsave(&tgt->sess_work_lock, flags); 4275 4276 kfree(prm); 4277 } 4278 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 4279 } 4280 4281 /* Must be called under tgt_host_action_mutex */ 4282 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) 4283 { 4284 struct qla_tgt *tgt; 4285 4286 if (!QLA_TGT_MODE_ENABLED()) 4287 return 0; 4288 4289 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, 4290 "Registering target for host %ld(%p)", base_vha->host_no, ha); 4291 4292 BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL)); 4293 4294 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); 4295 if (!tgt) { 4296 ql_dbg(ql_dbg_tgt, base_vha, 0xe066, 4297 "Unable to allocate struct qla_tgt\n"); 4298 return -ENOMEM; 4299 } 4300 4301 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) 4302 base_vha->host->hostt->supported_mode |= MODE_TARGET; 4303 4304 tgt->ha = ha; 4305 tgt->vha = base_vha; 4306 init_waitqueue_head(&tgt->waitQ); 4307 INIT_LIST_HEAD(&tgt->sess_list); 4308 INIT_LIST_HEAD(&tgt->del_sess_list); 4309 INIT_DELAYED_WORK(&tgt->sess_del_work, 4310 (void (*)(struct work_struct *))qlt_del_sess_work_fn); 4311 spin_lock_init(&tgt->sess_work_lock); 4312 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); 4313 INIT_LIST_HEAD(&tgt->sess_works_list); 4314 spin_lock_init(&tgt->srr_lock); 4315 INIT_LIST_HEAD(&tgt->srr_ctio_list); 4316 INIT_LIST_HEAD(&tgt->srr_imm_list); 4317 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); 4318 atomic_set(&tgt->tgt_global_resets_count, 0); 4319 4320 ha->tgt.qla_tgt = tgt; 4321 4322 ql_dbg(ql_dbg_tgt, base_vha, 0xe067, 4323 "qla_target(%d): using 64 Bit PCI addressing", 4324 base_vha->vp_idx); 4325 tgt->tgt_enable_64bit_addr = 1; 4326 /* 3 is reserved */ 4327 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); 4328 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; 4329 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; 4330 4331 mutex_lock(&qla_tgt_mutex); 4332 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); 4333 mutex_unlock(&qla_tgt_mutex); 4334 4335 return 0; 4336 } 4337 4338 /* Must be called under tgt_host_action_mutex */ 4339 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) 4340 { 4341 if (!ha->tgt.qla_tgt) 4342 return 0; 4343 4344 mutex_lock(&qla_tgt_mutex); 4345 list_del(&ha->tgt.qla_tgt->tgt_list_entry); 4346 mutex_unlock(&qla_tgt_mutex); 4347 4348 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", 4349 vha->host_no, ha); 4350 qlt_release(ha->tgt.qla_tgt); 4351 4352 return 0; 4353 } 4354 4355 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, 4356 unsigned char *b) 4357 { 4358 int i; 4359 4360 pr_debug("qla2xxx HW vha->node_name: "); 4361 for (i = 0; i < WWN_SIZE; i++) 4362 pr_debug("%02x ", vha->node_name[i]); 4363 pr_debug("\n"); 4364 pr_debug("qla2xxx HW vha->port_name: "); 4365 for (i = 0; i < WWN_SIZE; i++) 4366 pr_debug("%02x ", vha->port_name[i]); 4367 pr_debug("\n"); 4368 4369 pr_debug("qla2xxx passed configfs WWPN: "); 4370 put_unaligned_be64(wwpn, b); 4371 for (i = 0; i < WWN_SIZE; i++) 4372 pr_debug("%02x ", b[i]); 4373 pr_debug("\n"); 4374 } 4375 4376 /** 4377 * qla_tgt_lport_register - register lport with external module 4378 * 4379 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops 4380 * @wwpn: Passwd FC target WWPN 4381 * @callback: lport initialization callback for tcm_qla2xxx code 4382 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data 4383 */ 4384 int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn, 4385 int (*callback)(struct scsi_qla_host *), void *target_lport_ptr) 4386 { 4387 struct qla_tgt *tgt; 4388 struct scsi_qla_host *vha; 4389 struct qla_hw_data *ha; 4390 struct Scsi_Host *host; 4391 unsigned long flags; 4392 int rc; 4393 u8 b[WWN_SIZE]; 4394 4395 mutex_lock(&qla_tgt_mutex); 4396 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { 4397 vha = tgt->vha; 4398 ha = vha->hw; 4399 4400 host = vha->host; 4401 if (!host) 4402 continue; 4403 4404 if (ha->tgt.tgt_ops != NULL) 4405 continue; 4406 4407 if (!(host->hostt->supported_mode & MODE_TARGET)) 4408 continue; 4409 4410 spin_lock_irqsave(&ha->hardware_lock, flags); 4411 if (host->active_mode & MODE_TARGET) { 4412 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", 4413 host->host_no); 4414 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4415 continue; 4416 } 4417 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4418 4419 if (!scsi_host_get(host)) { 4420 ql_dbg(ql_dbg_tgt, vha, 0xe068, 4421 "Unable to scsi_host_get() for" 4422 " qla2xxx scsi_host\n"); 4423 continue; 4424 } 4425 qlt_lport_dump(vha, wwpn, b); 4426 4427 if (memcmp(vha->port_name, b, WWN_SIZE)) { 4428 scsi_host_put(host); 4429 continue; 4430 } 4431 /* 4432 * Setup passed parameters ahead of invoking callback 4433 */ 4434 ha->tgt.tgt_ops = qla_tgt_ops; 4435 ha->tgt.target_lport_ptr = target_lport_ptr; 4436 rc = (*callback)(vha); 4437 if (rc != 0) { 4438 ha->tgt.tgt_ops = NULL; 4439 ha->tgt.target_lport_ptr = NULL; 4440 } 4441 mutex_unlock(&qla_tgt_mutex); 4442 return rc; 4443 } 4444 mutex_unlock(&qla_tgt_mutex); 4445 4446 return -ENODEV; 4447 } 4448 EXPORT_SYMBOL(qlt_lport_register); 4449 4450 /** 4451 * qla_tgt_lport_deregister - Degister lport 4452 * 4453 * @vha: Registered scsi_qla_host pointer 4454 */ 4455 void qlt_lport_deregister(struct scsi_qla_host *vha) 4456 { 4457 struct qla_hw_data *ha = vha->hw; 4458 struct Scsi_Host *sh = vha->host; 4459 /* 4460 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data 4461 */ 4462 ha->tgt.target_lport_ptr = NULL; 4463 ha->tgt.tgt_ops = NULL; 4464 /* 4465 * Release the Scsi_Host reference for the underlying qla2xxx host 4466 */ 4467 scsi_host_put(sh); 4468 } 4469 EXPORT_SYMBOL(qlt_lport_deregister); 4470 4471 /* Must be called under HW lock */ 4472 void qlt_set_mode(struct scsi_qla_host *vha) 4473 { 4474 struct qla_hw_data *ha = vha->hw; 4475 4476 switch (ql2x_ini_mode) { 4477 case QLA2XXX_INI_MODE_DISABLED: 4478 case QLA2XXX_INI_MODE_EXCLUSIVE: 4479 vha->host->active_mode = MODE_TARGET; 4480 break; 4481 case QLA2XXX_INI_MODE_ENABLED: 4482 vha->host->active_mode |= MODE_TARGET; 4483 break; 4484 default: 4485 break; 4486 } 4487 4488 if (ha->tgt.ini_mode_force_reverse) 4489 qla_reverse_ini_mode(vha); 4490 } 4491 4492 /* Must be called under HW lock */ 4493 void qlt_clear_mode(struct scsi_qla_host *vha) 4494 { 4495 struct qla_hw_data *ha = vha->hw; 4496 4497 switch (ql2x_ini_mode) { 4498 case QLA2XXX_INI_MODE_DISABLED: 4499 vha->host->active_mode = MODE_UNKNOWN; 4500 break; 4501 case QLA2XXX_INI_MODE_EXCLUSIVE: 4502 vha->host->active_mode = MODE_INITIATOR; 4503 break; 4504 case QLA2XXX_INI_MODE_ENABLED: 4505 vha->host->active_mode &= ~MODE_TARGET; 4506 break; 4507 default: 4508 break; 4509 } 4510 4511 if (ha->tgt.ini_mode_force_reverse) 4512 qla_reverse_ini_mode(vha); 4513 } 4514 4515 /* 4516 * qla_tgt_enable_vha - NO LOCK HELD 4517 * 4518 * host_reset, bring up w/ Target Mode Enabled 4519 */ 4520 void 4521 qlt_enable_vha(struct scsi_qla_host *vha) 4522 { 4523 struct qla_hw_data *ha = vha->hw; 4524 struct qla_tgt *tgt = ha->tgt.qla_tgt; 4525 unsigned long flags; 4526 4527 if (!tgt) { 4528 ql_dbg(ql_dbg_tgt, vha, 0xe069, 4529 "Unable to locate qla_tgt pointer from" 4530 " struct qla_hw_data\n"); 4531 dump_stack(); 4532 return; 4533 } 4534 4535 spin_lock_irqsave(&ha->hardware_lock, flags); 4536 tgt->tgt_stopped = 0; 4537 qlt_set_mode(vha); 4538 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4539 4540 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 4541 qla2xxx_wake_dpc(vha); 4542 qla2x00_wait_for_hba_online(vha); 4543 } 4544 EXPORT_SYMBOL(qlt_enable_vha); 4545 4546 /* 4547 * qla_tgt_disable_vha - NO LOCK HELD 4548 * 4549 * Disable Target Mode and reset the adapter 4550 */ 4551 void 4552 qlt_disable_vha(struct scsi_qla_host *vha) 4553 { 4554 struct qla_hw_data *ha = vha->hw; 4555 struct qla_tgt *tgt = ha->tgt.qla_tgt; 4556 unsigned long flags; 4557 4558 if (!tgt) { 4559 ql_dbg(ql_dbg_tgt, vha, 0xe06a, 4560 "Unable to locate qla_tgt pointer from" 4561 " struct qla_hw_data\n"); 4562 dump_stack(); 4563 return; 4564 } 4565 4566 spin_lock_irqsave(&ha->hardware_lock, flags); 4567 qlt_clear_mode(vha); 4568 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4569 4570 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 4571 qla2xxx_wake_dpc(vha); 4572 qla2x00_wait_for_hba_online(vha); 4573 } 4574 4575 /* 4576 * Called from qla_init.c:qla24xx_vport_create() contex to setup 4577 * the target mode specific struct scsi_qla_host and struct qla_hw_data 4578 * members. 4579 */ 4580 void 4581 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) 4582 { 4583 if (!qla_tgt_mode_enabled(vha)) 4584 return; 4585 4586 mutex_init(&ha->tgt.tgt_mutex); 4587 mutex_init(&ha->tgt.tgt_host_action_mutex); 4588 4589 qlt_clear_mode(vha); 4590 4591 /* 4592 * NOTE: Currently the value is kept the same for <24xx and 4593 * >=24xx ISPs. If it is necessary to change it, 4594 * the check should be added for specific ISPs, 4595 * assigning the value appropriately. 4596 */ 4597 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; 4598 } 4599 4600 void 4601 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) 4602 { 4603 /* 4604 * FC-4 Feature bit 0 indicates target functionality to the name server. 4605 */ 4606 if (qla_tgt_mode_enabled(vha)) { 4607 if (qla_ini_mode_enabled(vha)) 4608 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; 4609 else 4610 ct_req->req.rff_id.fc4_feature = BIT_0; 4611 } else if (qla_ini_mode_enabled(vha)) { 4612 ct_req->req.rff_id.fc4_feature = BIT_1; 4613 } 4614 } 4615 4616 /* 4617 * qlt_init_atio_q_entries() - Initializes ATIO queue entries. 4618 * @ha: HA context 4619 * 4620 * Beginning of ATIO ring has initialization control block already built 4621 * by nvram config routine. 4622 * 4623 * Returns 0 on success. 4624 */ 4625 void 4626 qlt_init_atio_q_entries(struct scsi_qla_host *vha) 4627 { 4628 struct qla_hw_data *ha = vha->hw; 4629 uint16_t cnt; 4630 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; 4631 4632 if (!qla_tgt_mode_enabled(vha)) 4633 return; 4634 4635 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { 4636 pkt->u.raw.signature = ATIO_PROCESSED; 4637 pkt++; 4638 } 4639 4640 } 4641 4642 /* 4643 * qlt_24xx_process_atio_queue() - Process ATIO queue entries. 4644 * @ha: SCSI driver HA context 4645 */ 4646 void 4647 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha) 4648 { 4649 struct qla_hw_data *ha = vha->hw; 4650 struct device_reg_24xx __iomem *reg = &ha->iobase->isp24; 4651 struct atio_from_isp *pkt; 4652 int cnt, i; 4653 4654 if (!vha->flags.online) 4655 return; 4656 4657 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) { 4658 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 4659 cnt = pkt->u.raw.entry_count; 4660 4661 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt); 4662 4663 for (i = 0; i < cnt; i++) { 4664 ha->tgt.atio_ring_index++; 4665 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { 4666 ha->tgt.atio_ring_index = 0; 4667 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; 4668 } else 4669 ha->tgt.atio_ring_ptr++; 4670 4671 pkt->u.raw.signature = ATIO_PROCESSED; 4672 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 4673 } 4674 wmb(); 4675 } 4676 4677 /* Adjust ring index */ 4678 WRT_REG_DWORD(®->atio_q_out, ha->tgt.atio_ring_index); 4679 } 4680 4681 void 4682 qlt_24xx_config_rings(struct scsi_qla_host *vha, device_reg_t __iomem *reg) 4683 { 4684 struct qla_hw_data *ha = vha->hw; 4685 4686 /* FIXME: atio_q in/out for ha->mqenable=1..? */ 4687 if (ha->mqenable) { 4688 #if 0 4689 WRT_REG_DWORD(®->isp25mq.atio_q_in, 0); 4690 WRT_REG_DWORD(®->isp25mq.atio_q_out, 0); 4691 RD_REG_DWORD(®->isp25mq.atio_q_out); 4692 #endif 4693 } else { 4694 /* Setup APTIO registers for target mode */ 4695 WRT_REG_DWORD(®->isp24.atio_q_in, 0); 4696 WRT_REG_DWORD(®->isp24.atio_q_out, 0); 4697 RD_REG_DWORD(®->isp24.atio_q_out); 4698 } 4699 } 4700 4701 void 4702 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 4703 { 4704 struct qla_hw_data *ha = vha->hw; 4705 4706 if (qla_tgt_mode_enabled(vha)) { 4707 if (!ha->tgt.saved_set) { 4708 /* We save only once */ 4709 ha->tgt.saved_exchange_count = nv->exchange_count; 4710 ha->tgt.saved_firmware_options_1 = 4711 nv->firmware_options_1; 4712 ha->tgt.saved_firmware_options_2 = 4713 nv->firmware_options_2; 4714 ha->tgt.saved_firmware_options_3 = 4715 nv->firmware_options_3; 4716 ha->tgt.saved_set = 1; 4717 } 4718 4719 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 4720 4721 /* Enable target mode */ 4722 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 4723 4724 /* Disable ini mode, if requested */ 4725 if (!qla_ini_mode_enabled(vha)) 4726 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5); 4727 4728 /* Disable Full Login after LIP */ 4729 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 4730 /* Enable initial LIP */ 4731 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 4732 /* Enable FC tapes support */ 4733 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12); 4734 /* Disable Full Login after LIP */ 4735 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 4736 /* Enable target PRLI control */ 4737 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 4738 } else { 4739 if (ha->tgt.saved_set) { 4740 nv->exchange_count = ha->tgt.saved_exchange_count; 4741 nv->firmware_options_1 = 4742 ha->tgt.saved_firmware_options_1; 4743 nv->firmware_options_2 = 4744 ha->tgt.saved_firmware_options_2; 4745 nv->firmware_options_3 = 4746 ha->tgt.saved_firmware_options_3; 4747 } 4748 return; 4749 } 4750 4751 /* out-of-order frames reassembly */ 4752 nv->firmware_options_3 |= BIT_6|BIT_9; 4753 4754 if (ha->tgt.enable_class_2) { 4755 if (vha->flags.init_done) 4756 fc_host_supported_classes(vha->host) = 4757 FC_COS_CLASS2 | FC_COS_CLASS3; 4758 4759 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 4760 } else { 4761 if (vha->flags.init_done) 4762 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 4763 4764 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 4765 } 4766 } 4767 4768 void 4769 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, 4770 struct init_cb_24xx *icb) 4771 { 4772 struct qla_hw_data *ha = vha->hw; 4773 4774 if (ha->tgt.node_name_set) { 4775 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 4776 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 4777 } 4778 } 4779 4780 int 4781 qlt_24xx_process_response_error(struct scsi_qla_host *vha, 4782 struct sts_entry_24xx *pkt) 4783 { 4784 switch (pkt->entry_type) { 4785 case ABTS_RECV_24XX: 4786 case ABTS_RESP_24XX: 4787 case CTIO_TYPE7: 4788 case NOTIFY_ACK_TYPE: 4789 return 1; 4790 default: 4791 return 0; 4792 } 4793 } 4794 4795 void 4796 qlt_modify_vp_config(struct scsi_qla_host *vha, 4797 struct vp_config_entry_24xx *vpmod) 4798 { 4799 if (qla_tgt_mode_enabled(vha)) 4800 vpmod->options_idx1 &= ~BIT_5; 4801 /* Disable ini mode, if requested */ 4802 if (!qla_ini_mode_enabled(vha)) 4803 vpmod->options_idx1 &= ~BIT_4; 4804 } 4805 4806 void 4807 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) 4808 { 4809 if (!QLA_TGT_MODE_ENABLED()) 4810 return; 4811 4812 mutex_init(&ha->tgt.tgt_mutex); 4813 mutex_init(&ha->tgt.tgt_host_action_mutex); 4814 qlt_clear_mode(base_vha); 4815 } 4816 4817 int 4818 qlt_mem_alloc(struct qla_hw_data *ha) 4819 { 4820 if (!QLA_TGT_MODE_ENABLED()) 4821 return 0; 4822 4823 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * 4824 MAX_MULTI_ID_FABRIC, GFP_KERNEL); 4825 if (!ha->tgt.tgt_vp_map) 4826 return -ENOMEM; 4827 4828 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, 4829 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), 4830 &ha->tgt.atio_dma, GFP_KERNEL); 4831 if (!ha->tgt.atio_ring) { 4832 kfree(ha->tgt.tgt_vp_map); 4833 return -ENOMEM; 4834 } 4835 return 0; 4836 } 4837 4838 void 4839 qlt_mem_free(struct qla_hw_data *ha) 4840 { 4841 if (!QLA_TGT_MODE_ENABLED()) 4842 return; 4843 4844 if (ha->tgt.atio_ring) { 4845 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * 4846 sizeof(struct atio_from_isp), ha->tgt.atio_ring, 4847 ha->tgt.atio_dma); 4848 } 4849 kfree(ha->tgt.tgt_vp_map); 4850 } 4851 4852 /* vport_slock to be held by the caller */ 4853 void 4854 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) 4855 { 4856 if (!QLA_TGT_MODE_ENABLED()) 4857 return; 4858 4859 switch (cmd) { 4860 case SET_VP_IDX: 4861 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; 4862 break; 4863 case SET_AL_PA: 4864 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; 4865 break; 4866 case RESET_VP_IDX: 4867 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; 4868 break; 4869 case RESET_AL_PA: 4870 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; 4871 break; 4872 } 4873 } 4874 4875 static int __init qlt_parse_ini_mode(void) 4876 { 4877 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) 4878 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 4879 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) 4880 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; 4881 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) 4882 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; 4883 else 4884 return false; 4885 4886 return true; 4887 } 4888 4889 int __init qlt_init(void) 4890 { 4891 int ret; 4892 4893 if (!qlt_parse_ini_mode()) { 4894 ql_log(ql_log_fatal, NULL, 0xe06b, 4895 "qlt_parse_ini_mode() failed\n"); 4896 return -EINVAL; 4897 } 4898 4899 if (!QLA_TGT_MODE_ENABLED()) 4900 return 0; 4901 4902 qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep", 4903 sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0, 4904 NULL); 4905 if (!qla_tgt_cmd_cachep) { 4906 ql_log(ql_log_fatal, NULL, 0xe06c, 4907 "kmem_cache_create for qla_tgt_cmd_cachep failed\n"); 4908 return -ENOMEM; 4909 } 4910 4911 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", 4912 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct 4913 qla_tgt_mgmt_cmd), 0, NULL); 4914 if (!qla_tgt_mgmt_cmd_cachep) { 4915 ql_log(ql_log_fatal, NULL, 0xe06d, 4916 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); 4917 ret = -ENOMEM; 4918 goto out; 4919 } 4920 4921 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, 4922 mempool_free_slab, qla_tgt_mgmt_cmd_cachep); 4923 if (!qla_tgt_mgmt_cmd_mempool) { 4924 ql_log(ql_log_fatal, NULL, 0xe06e, 4925 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); 4926 ret = -ENOMEM; 4927 goto out_mgmt_cmd_cachep; 4928 } 4929 4930 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); 4931 if (!qla_tgt_wq) { 4932 ql_log(ql_log_fatal, NULL, 0xe06f, 4933 "alloc_workqueue for qla_tgt_wq failed\n"); 4934 ret = -ENOMEM; 4935 goto out_cmd_mempool; 4936 } 4937 /* 4938 * Return 1 to signal that initiator-mode is being disabled 4939 */ 4940 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; 4941 4942 out_cmd_mempool: 4943 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 4944 out_mgmt_cmd_cachep: 4945 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 4946 out: 4947 kmem_cache_destroy(qla_tgt_cmd_cachep); 4948 return ret; 4949 } 4950 4951 void qlt_exit(void) 4952 { 4953 if (!QLA_TGT_MODE_ENABLED()) 4954 return; 4955 4956 destroy_workqueue(qla_tgt_wq); 4957 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 4958 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 4959 kmem_cache_destroy(qla_tgt_cmd_cachep); 4960 } 4961