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