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 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 56 57 /* 58 * From scsi/fc/fc_fcp.h 59 */ 60 enum fcp_resp_rsp_codes { 61 FCP_TMF_CMPL = 0, 62 FCP_DATA_LEN_INVALID = 1, 63 FCP_CMND_FIELDS_INVALID = 2, 64 FCP_DATA_PARAM_MISMATCH = 3, 65 FCP_TMF_REJECTED = 4, 66 FCP_TMF_FAILED = 5, 67 FCP_TMF_INVALID_LUN = 9, 68 }; 69 70 /* 71 * fc_pri_ta from scsi/fc/fc_fcp.h 72 */ 73 #define FCP_PTA_SIMPLE 0 /* simple task attribute */ 74 #define FCP_PTA_HEADQ 1 /* head of queue task attribute */ 75 #define FCP_PTA_ORDERED 2 /* ordered task attribute */ 76 #define FCP_PTA_ACA 4 /* auto. contingent allegiance */ 77 #define FCP_PTA_MASK 7 /* mask for task attribute field */ 78 #define FCP_PRI_SHIFT 3 /* priority field starts in bit 3 */ 79 #define FCP_PRI_RESVD_MASK 0x80 /* reserved bits in priority field */ 80 81 /* 82 * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which 83 * must be called under HW lock and could unlock/lock it inside. 84 * It isn't an issue, since in the current implementation on the time when 85 * those functions are called: 86 * 87 * - Either context is IRQ and only IRQ handler can modify HW data, 88 * including rings related fields, 89 * 90 * - Or access to target mode variables from struct qla_tgt doesn't 91 * cross those functions boundaries, except tgt_stop, which 92 * additionally protected by irq_cmd_count. 93 */ 94 /* Predefs for callbacks handed to qla2xxx LLD */ 95 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha, 96 struct atio_from_isp *pkt); 97 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt); 98 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 99 int fn, void *iocb, int flags); 100 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd 101 *cmd, struct atio_from_isp *atio, int ha_locked); 102 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha, 103 struct qla_tgt_srr_imm *imm, int ha_lock); 104 /* 105 * Global Variables 106 */ 107 static struct kmem_cache *qla_tgt_cmd_cachep; 108 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep; 109 static mempool_t *qla_tgt_mgmt_cmd_mempool; 110 static struct workqueue_struct *qla_tgt_wq; 111 static DEFINE_MUTEX(qla_tgt_mutex); 112 static LIST_HEAD(qla_tgt_glist); 113 114 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */ 115 static struct qla_tgt_sess *qlt_find_sess_by_port_name( 116 struct qla_tgt *tgt, 117 const uint8_t *port_name) 118 { 119 struct qla_tgt_sess *sess; 120 121 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) { 122 if (!memcmp(sess->port_name, port_name, WWN_SIZE)) 123 return sess; 124 } 125 126 return NULL; 127 } 128 129 /* Might release hw lock, then reaquire!! */ 130 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked) 131 { 132 /* Send marker if required */ 133 if (unlikely(vha->marker_needed != 0)) { 134 int rc = qla2x00_issue_marker(vha, vha_locked); 135 if (rc != QLA_SUCCESS) { 136 ql_dbg(ql_dbg_tgt, vha, 0xe03d, 137 "qla_target(%d): issue_marker() failed\n", 138 vha->vp_idx); 139 } 140 return rc; 141 } 142 return QLA_SUCCESS; 143 } 144 145 static inline 146 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha, 147 uint8_t *d_id) 148 { 149 struct qla_hw_data *ha = vha->hw; 150 uint8_t vp_idx; 151 152 if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0])) 153 return NULL; 154 155 if (vha->d_id.b.al_pa == d_id[2]) 156 return vha; 157 158 BUG_ON(ha->tgt.tgt_vp_map == NULL); 159 vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx; 160 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 161 return ha->tgt.tgt_vp_map[vp_idx].vha; 162 163 return NULL; 164 } 165 166 static inline 167 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha, 168 uint16_t vp_idx) 169 { 170 struct qla_hw_data *ha = vha->hw; 171 172 if (vha->vp_idx == vp_idx) 173 return vha; 174 175 BUG_ON(ha->tgt.tgt_vp_map == NULL); 176 if (likely(test_bit(vp_idx, ha->vp_idx_map))) 177 return ha->tgt.tgt_vp_map[vp_idx].vha; 178 179 return NULL; 180 } 181 182 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha, 183 struct atio_from_isp *atio) 184 { 185 switch (atio->u.raw.entry_type) { 186 case ATIO_TYPE7: 187 { 188 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha, 189 atio->u.isp24.fcp_hdr.d_id); 190 if (unlikely(NULL == host)) { 191 ql_dbg(ql_dbg_tgt, vha, 0xe03e, 192 "qla_target(%d): Received ATIO_TYPE7 " 193 "with unknown d_id %x:%x:%x\n", vha->vp_idx, 194 atio->u.isp24.fcp_hdr.d_id[0], 195 atio->u.isp24.fcp_hdr.d_id[1], 196 atio->u.isp24.fcp_hdr.d_id[2]); 197 break; 198 } 199 qlt_24xx_atio_pkt(host, atio); 200 break; 201 } 202 203 case IMMED_NOTIFY_TYPE: 204 { 205 struct scsi_qla_host *host = vha; 206 struct imm_ntfy_from_isp *entry = 207 (struct imm_ntfy_from_isp *)atio; 208 209 if ((entry->u.isp24.vp_index != 0xFF) && 210 (entry->u.isp24.nport_handle != 0xFFFF)) { 211 host = qlt_find_host_by_vp_idx(vha, 212 entry->u.isp24.vp_index); 213 if (unlikely(!host)) { 214 ql_dbg(ql_dbg_tgt, vha, 0xe03f, 215 "qla_target(%d): Received " 216 "ATIO (IMMED_NOTIFY_TYPE) " 217 "with unknown vp_index %d\n", 218 vha->vp_idx, entry->u.isp24.vp_index); 219 break; 220 } 221 } 222 qlt_24xx_atio_pkt(host, atio); 223 break; 224 } 225 226 default: 227 ql_dbg(ql_dbg_tgt, vha, 0xe040, 228 "qla_target(%d): Received unknown ATIO atio " 229 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 230 break; 231 } 232 233 return; 234 } 235 236 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt) 237 { 238 switch (pkt->entry_type) { 239 case CTIO_TYPE7: 240 { 241 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 242 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 243 entry->vp_index); 244 if (unlikely(!host)) { 245 ql_dbg(ql_dbg_tgt, vha, 0xe041, 246 "qla_target(%d): Response pkt (CTIO_TYPE7) " 247 "received, with unknown vp_index %d\n", 248 vha->vp_idx, entry->vp_index); 249 break; 250 } 251 qlt_response_pkt(host, pkt); 252 break; 253 } 254 255 case IMMED_NOTIFY_TYPE: 256 { 257 struct scsi_qla_host *host = vha; 258 struct imm_ntfy_from_isp *entry = 259 (struct imm_ntfy_from_isp *)pkt; 260 261 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index); 262 if (unlikely(!host)) { 263 ql_dbg(ql_dbg_tgt, vha, 0xe042, 264 "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) " 265 "received, with unknown vp_index %d\n", 266 vha->vp_idx, entry->u.isp24.vp_index); 267 break; 268 } 269 qlt_response_pkt(host, pkt); 270 break; 271 } 272 273 case NOTIFY_ACK_TYPE: 274 { 275 struct scsi_qla_host *host = vha; 276 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 277 278 if (0xFF != entry->u.isp24.vp_index) { 279 host = qlt_find_host_by_vp_idx(vha, 280 entry->u.isp24.vp_index); 281 if (unlikely(!host)) { 282 ql_dbg(ql_dbg_tgt, vha, 0xe043, 283 "qla_target(%d): Response " 284 "pkt (NOTIFY_ACK_TYPE) " 285 "received, with unknown " 286 "vp_index %d\n", vha->vp_idx, 287 entry->u.isp24.vp_index); 288 break; 289 } 290 } 291 qlt_response_pkt(host, pkt); 292 break; 293 } 294 295 case ABTS_RECV_24XX: 296 { 297 struct abts_recv_from_24xx *entry = 298 (struct abts_recv_from_24xx *)pkt; 299 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 300 entry->vp_index); 301 if (unlikely(!host)) { 302 ql_dbg(ql_dbg_tgt, vha, 0xe044, 303 "qla_target(%d): Response pkt " 304 "(ABTS_RECV_24XX) received, with unknown " 305 "vp_index %d\n", vha->vp_idx, entry->vp_index); 306 break; 307 } 308 qlt_response_pkt(host, pkt); 309 break; 310 } 311 312 case ABTS_RESP_24XX: 313 { 314 struct abts_resp_to_24xx *entry = 315 (struct abts_resp_to_24xx *)pkt; 316 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha, 317 entry->vp_index); 318 if (unlikely(!host)) { 319 ql_dbg(ql_dbg_tgt, vha, 0xe045, 320 "qla_target(%d): Response pkt " 321 "(ABTS_RECV_24XX) received, with unknown " 322 "vp_index %d\n", vha->vp_idx, entry->vp_index); 323 break; 324 } 325 qlt_response_pkt(host, pkt); 326 break; 327 } 328 329 default: 330 qlt_response_pkt(vha, pkt); 331 break; 332 } 333 334 } 335 336 static void qlt_free_session_done(struct work_struct *work) 337 { 338 struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess, 339 free_work); 340 struct qla_tgt *tgt = sess->tgt; 341 struct scsi_qla_host *vha = sess->vha; 342 struct qla_hw_data *ha = vha->hw; 343 344 BUG_ON(!tgt); 345 /* 346 * Release the target session for FC Nexus from fabric module code. 347 */ 348 if (sess->se_sess != NULL) 349 ha->tgt.tgt_ops->free_session(sess); 350 351 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001, 352 "Unregistration of sess %p finished\n", sess); 353 354 kfree(sess); 355 /* 356 * We need to protect against race, when tgt is freed before or 357 * inside wake_up() 358 */ 359 tgt->sess_count--; 360 if (tgt->sess_count == 0) 361 wake_up_all(&tgt->waitQ); 362 } 363 364 /* ha->hardware_lock supposed to be held on entry */ 365 void qlt_unreg_sess(struct qla_tgt_sess *sess) 366 { 367 struct scsi_qla_host *vha = sess->vha; 368 369 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess); 370 371 list_del(&sess->sess_list_entry); 372 if (sess->deleted) 373 list_del(&sess->del_list_entry); 374 375 INIT_WORK(&sess->free_work, qlt_free_session_done); 376 schedule_work(&sess->free_work); 377 } 378 EXPORT_SYMBOL(qlt_unreg_sess); 379 380 /* ha->hardware_lock supposed to be held on entry */ 381 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd) 382 { 383 struct qla_hw_data *ha = vha->hw; 384 struct qla_tgt_sess *sess = NULL; 385 uint32_t unpacked_lun, lun = 0; 386 uint16_t loop_id; 387 int res = 0; 388 struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb; 389 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 390 391 loop_id = le16_to_cpu(n->u.isp24.nport_handle); 392 if (loop_id == 0xFFFF) { 393 #if 0 /* FIXME: Re-enable Global event handling.. */ 394 /* Global event */ 395 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count); 396 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1); 397 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) { 398 sess = list_entry(ha->tgt.qla_tgt->sess_list.next, 399 typeof(*sess), sess_list_entry); 400 switch (mcmd) { 401 case QLA_TGT_NEXUS_LOSS_SESS: 402 mcmd = QLA_TGT_NEXUS_LOSS; 403 break; 404 case QLA_TGT_ABORT_ALL_SESS: 405 mcmd = QLA_TGT_ABORT_ALL; 406 break; 407 case QLA_TGT_NEXUS_LOSS: 408 case QLA_TGT_ABORT_ALL: 409 break; 410 default: 411 ql_dbg(ql_dbg_tgt, vha, 0xe046, 412 "qla_target(%d): Not allowed " 413 "command %x in %s", vha->vp_idx, 414 mcmd, __func__); 415 sess = NULL; 416 break; 417 } 418 } else 419 sess = NULL; 420 #endif 421 } else { 422 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 423 } 424 425 ql_dbg(ql_dbg_tgt, vha, 0xe000, 426 "Using sess for qla_tgt_reset: %p\n", sess); 427 if (!sess) { 428 res = -ESRCH; 429 return res; 430 } 431 432 ql_dbg(ql_dbg_tgt, vha, 0xe047, 433 "scsi(%ld): resetting (session %p from port " 434 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, " 435 "mcmd %x, loop_id %d)\n", vha->host_no, sess, 436 sess->port_name[0], sess->port_name[1], 437 sess->port_name[2], sess->port_name[3], 438 sess->port_name[4], sess->port_name[5], 439 sess->port_name[6], sess->port_name[7], 440 mcmd, loop_id); 441 442 lun = a->u.isp24.fcp_cmnd.lun; 443 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 444 445 return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd, 446 iocb, QLA24XX_MGMT_SEND_NACK); 447 } 448 449 /* ha->hardware_lock supposed to be held on entry */ 450 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess, 451 bool immediate) 452 { 453 struct qla_tgt *tgt = sess->tgt; 454 uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5; 455 456 if (sess->deleted) 457 return; 458 459 ql_dbg(ql_dbg_tgt, sess->vha, 0xe001, 460 "Scheduling sess %p for deletion\n", sess); 461 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list); 462 sess->deleted = 1; 463 464 if (immediate) 465 dev_loss_tmo = 0; 466 467 sess->expires = jiffies + dev_loss_tmo * HZ; 468 469 ql_dbg(ql_dbg_tgt, sess->vha, 0xe048, 470 "qla_target(%d): session for port %02x:%02x:%02x:" 471 "%02x:%02x:%02x:%02x:%02x (loop ID %d) scheduled for " 472 "deletion in %u secs (expires: %lu) immed: %d\n", 473 sess->vha->vp_idx, 474 sess->port_name[0], sess->port_name[1], 475 sess->port_name[2], sess->port_name[3], 476 sess->port_name[4], sess->port_name[5], 477 sess->port_name[6], sess->port_name[7], 478 sess->loop_id, dev_loss_tmo, sess->expires, immediate); 479 480 if (immediate) 481 schedule_delayed_work(&tgt->sess_del_work, 0); 482 else 483 schedule_delayed_work(&tgt->sess_del_work, 484 jiffies - sess->expires); 485 } 486 487 /* ha->hardware_lock supposed to be held on entry */ 488 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only) 489 { 490 struct qla_tgt_sess *sess; 491 492 list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) 493 qlt_schedule_sess_for_deletion(sess, true); 494 495 /* At this point tgt could be already dead */ 496 } 497 498 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id, 499 uint16_t *loop_id) 500 { 501 struct qla_hw_data *ha = vha->hw; 502 dma_addr_t gid_list_dma; 503 struct gid_list_info *gid_list; 504 char *id_iter; 505 int res, rc, i; 506 uint16_t entries; 507 508 gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 509 &gid_list_dma, GFP_KERNEL); 510 if (!gid_list) { 511 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044, 512 "qla_target(%d): DMA Alloc failed of %u\n", 513 vha->vp_idx, qla2x00_gid_list_size(ha)); 514 return -ENOMEM; 515 } 516 517 /* Get list of logged in devices */ 518 rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries); 519 if (rc != QLA_SUCCESS) { 520 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045, 521 "qla_target(%d): get_id_list() failed: %x\n", 522 vha->vp_idx, rc); 523 res = -1; 524 goto out_free_id_list; 525 } 526 527 id_iter = (char *)gid_list; 528 res = -1; 529 for (i = 0; i < entries; i++) { 530 struct gid_list_info *gid = (struct gid_list_info *)id_iter; 531 if ((gid->al_pa == s_id[2]) && 532 (gid->area == s_id[1]) && 533 (gid->domain == s_id[0])) { 534 *loop_id = le16_to_cpu(gid->loop_id); 535 res = 0; 536 break; 537 } 538 id_iter += ha->gid_list_info_size; 539 } 540 541 out_free_id_list: 542 dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha), 543 gid_list, gid_list_dma); 544 return res; 545 } 546 547 /* ha->hardware_lock supposed to be held on entry */ 548 static void qlt_undelete_sess(struct qla_tgt_sess *sess) 549 { 550 BUG_ON(!sess->deleted); 551 552 list_del(&sess->del_list_entry); 553 sess->deleted = 0; 554 } 555 556 static void qlt_del_sess_work_fn(struct delayed_work *work) 557 { 558 struct qla_tgt *tgt = container_of(work, struct qla_tgt, 559 sess_del_work); 560 struct scsi_qla_host *vha = tgt->vha; 561 struct qla_hw_data *ha = vha->hw; 562 struct qla_tgt_sess *sess; 563 unsigned long flags; 564 565 spin_lock_irqsave(&ha->hardware_lock, flags); 566 while (!list_empty(&tgt->del_sess_list)) { 567 sess = list_entry(tgt->del_sess_list.next, typeof(*sess), 568 del_list_entry); 569 if (time_after_eq(jiffies, sess->expires)) { 570 qlt_undelete_sess(sess); 571 572 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004, 573 "Timeout: sess %p about to be deleted\n", 574 sess); 575 ha->tgt.tgt_ops->shutdown_sess(sess); 576 ha->tgt.tgt_ops->put_sess(sess); 577 } else { 578 schedule_delayed_work(&tgt->sess_del_work, 579 jiffies - sess->expires); 580 break; 581 } 582 } 583 spin_unlock_irqrestore(&ha->hardware_lock, flags); 584 } 585 586 /* 587 * Adds an extra ref to allow to drop hw lock after adding sess to the list. 588 * Caller must put it. 589 */ 590 static struct qla_tgt_sess *qlt_create_sess( 591 struct scsi_qla_host *vha, 592 fc_port_t *fcport, 593 bool local) 594 { 595 struct qla_hw_data *ha = vha->hw; 596 struct qla_tgt_sess *sess; 597 unsigned long flags; 598 unsigned char be_sid[3]; 599 600 /* Check to avoid double sessions */ 601 spin_lock_irqsave(&ha->hardware_lock, flags); 602 list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list, 603 sess_list_entry) { 604 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) { 605 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005, 606 "Double sess %p found (s_id %x:%x:%x, " 607 "loop_id %d), updating to d_id %x:%x:%x, " 608 "loop_id %d", sess, sess->s_id.b.domain, 609 sess->s_id.b.al_pa, sess->s_id.b.area, 610 sess->loop_id, fcport->d_id.b.domain, 611 fcport->d_id.b.al_pa, fcport->d_id.b.area, 612 fcport->loop_id); 613 614 if (sess->deleted) 615 qlt_undelete_sess(sess); 616 617 kref_get(&sess->se_sess->sess_kref); 618 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 619 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 620 621 if (sess->local && !local) 622 sess->local = 0; 623 spin_unlock_irqrestore(&ha->hardware_lock, flags); 624 625 return sess; 626 } 627 } 628 spin_unlock_irqrestore(&ha->hardware_lock, flags); 629 630 sess = kzalloc(sizeof(*sess), GFP_KERNEL); 631 if (!sess) { 632 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a, 633 "qla_target(%u): session allocation failed, " 634 "all commands from port %02x:%02x:%02x:%02x:" 635 "%02x:%02x:%02x:%02x will be refused", vha->vp_idx, 636 fcport->port_name[0], fcport->port_name[1], 637 fcport->port_name[2], fcport->port_name[3], 638 fcport->port_name[4], fcport->port_name[5], 639 fcport->port_name[6], fcport->port_name[7]); 640 641 return NULL; 642 } 643 sess->tgt = ha->tgt.qla_tgt; 644 sess->vha = vha; 645 sess->s_id = fcport->d_id; 646 sess->loop_id = fcport->loop_id; 647 sess->local = local; 648 649 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006, 650 "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n", 651 sess, ha->tgt.qla_tgt); 652 653 be_sid[0] = sess->s_id.b.domain; 654 be_sid[1] = sess->s_id.b.area; 655 be_sid[2] = sess->s_id.b.al_pa; 656 /* 657 * Determine if this fc_port->port_name is allowed to access 658 * target mode using explict NodeACLs+MappedLUNs, or using 659 * TPG demo mode. If this is successful a target mode FC nexus 660 * is created. 661 */ 662 if (ha->tgt.tgt_ops->check_initiator_node_acl(vha, 663 &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) { 664 kfree(sess); 665 return NULL; 666 } 667 /* 668 * Take an extra reference to ->sess_kref here to handle qla_tgt_sess 669 * access across ->hardware_lock reaquire. 670 */ 671 kref_get(&sess->se_sess->sess_kref); 672 673 sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED); 674 BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name)); 675 memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name)); 676 677 spin_lock_irqsave(&ha->hardware_lock, flags); 678 list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list); 679 ha->tgt.qla_tgt->sess_count++; 680 spin_unlock_irqrestore(&ha->hardware_lock, flags); 681 682 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b, 683 "qla_target(%d): %ssession for wwn %02x:%02x:%02x:%02x:" 684 "%02x:%02x:%02x:%02x (loop_id %d, s_id %x:%x:%x, confirmed" 685 " completion %ssupported) added\n", 686 vha->vp_idx, local ? "local " : "", fcport->port_name[0], 687 fcport->port_name[1], fcport->port_name[2], fcport->port_name[3], 688 fcport->port_name[4], fcport->port_name[5], fcport->port_name[6], 689 fcport->port_name[7], fcport->loop_id, sess->s_id.b.domain, 690 sess->s_id.b.area, sess->s_id.b.al_pa, sess->conf_compl_supported ? 691 "" : "not "); 692 693 return sess; 694 } 695 696 /* 697 * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port() 698 */ 699 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport) 700 { 701 struct qla_hw_data *ha = vha->hw; 702 struct qla_tgt *tgt = ha->tgt.qla_tgt; 703 struct qla_tgt_sess *sess; 704 unsigned long flags; 705 706 if (!vha->hw->tgt.tgt_ops) 707 return; 708 709 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 710 return; 711 712 spin_lock_irqsave(&ha->hardware_lock, flags); 713 if (tgt->tgt_stop) { 714 spin_unlock_irqrestore(&ha->hardware_lock, flags); 715 return; 716 } 717 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 718 if (!sess) { 719 spin_unlock_irqrestore(&ha->hardware_lock, flags); 720 721 mutex_lock(&ha->tgt.tgt_mutex); 722 sess = qlt_create_sess(vha, fcport, false); 723 mutex_unlock(&ha->tgt.tgt_mutex); 724 725 spin_lock_irqsave(&ha->hardware_lock, flags); 726 } else { 727 kref_get(&sess->se_sess->sess_kref); 728 729 if (sess->deleted) { 730 qlt_undelete_sess(sess); 731 732 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c, 733 "qla_target(%u): %ssession for port %02x:" 734 "%02x:%02x:%02x:%02x:%02x:%02x:%02x (loop ID %d) " 735 "reappeared\n", vha->vp_idx, sess->local ? "local " 736 : "", sess->port_name[0], sess->port_name[1], 737 sess->port_name[2], sess->port_name[3], 738 sess->port_name[4], sess->port_name[5], 739 sess->port_name[6], sess->port_name[7], 740 sess->loop_id); 741 742 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007, 743 "Reappeared sess %p\n", sess); 744 } 745 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id, 746 (fcport->flags & FCF_CONF_COMP_SUPPORTED)); 747 } 748 749 if (sess && sess->local) { 750 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d, 751 "qla_target(%u): local session for " 752 "port %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x " 753 "(loop ID %d) became global\n", vha->vp_idx, 754 fcport->port_name[0], fcport->port_name[1], 755 fcport->port_name[2], fcport->port_name[3], 756 fcport->port_name[4], fcport->port_name[5], 757 fcport->port_name[6], fcport->port_name[7], 758 sess->loop_id); 759 sess->local = 0; 760 } 761 ha->tgt.tgt_ops->put_sess(sess); 762 spin_unlock_irqrestore(&ha->hardware_lock, flags); 763 } 764 765 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport) 766 { 767 struct qla_hw_data *ha = vha->hw; 768 struct qla_tgt *tgt = ha->tgt.qla_tgt; 769 struct qla_tgt_sess *sess; 770 unsigned long flags; 771 772 if (!vha->hw->tgt.tgt_ops) 773 return; 774 775 if (!tgt || (fcport->port_type != FCT_INITIATOR)) 776 return; 777 778 spin_lock_irqsave(&ha->hardware_lock, flags); 779 if (tgt->tgt_stop) { 780 spin_unlock_irqrestore(&ha->hardware_lock, flags); 781 return; 782 } 783 sess = qlt_find_sess_by_port_name(tgt, fcport->port_name); 784 if (!sess) { 785 spin_unlock_irqrestore(&ha->hardware_lock, flags); 786 return; 787 } 788 789 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess); 790 791 sess->local = 1; 792 qlt_schedule_sess_for_deletion(sess, false); 793 spin_unlock_irqrestore(&ha->hardware_lock, flags); 794 } 795 796 static inline int test_tgt_sess_count(struct qla_tgt *tgt) 797 { 798 struct qla_hw_data *ha = tgt->ha; 799 unsigned long flags; 800 int res; 801 /* 802 * We need to protect against race, when tgt is freed before or 803 * inside wake_up() 804 */ 805 spin_lock_irqsave(&ha->hardware_lock, flags); 806 ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002, 807 "tgt %p, empty(sess_list)=%d sess_count=%d\n", 808 tgt, list_empty(&tgt->sess_list), tgt->sess_count); 809 res = (tgt->sess_count == 0); 810 spin_unlock_irqrestore(&ha->hardware_lock, flags); 811 812 return res; 813 } 814 815 /* Called by tcm_qla2xxx configfs code */ 816 void qlt_stop_phase1(struct qla_tgt *tgt) 817 { 818 struct scsi_qla_host *vha = tgt->vha; 819 struct qla_hw_data *ha = tgt->ha; 820 unsigned long flags; 821 822 if (tgt->tgt_stop || tgt->tgt_stopped) { 823 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e, 824 "Already in tgt->tgt_stop or tgt_stopped state\n"); 825 dump_stack(); 826 return; 827 } 828 829 ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n", 830 vha->host_no, vha); 831 /* 832 * Mutex needed to sync with qla_tgt_fc_port_[added,deleted]. 833 * Lock is needed, because we still can get an incoming packet. 834 */ 835 mutex_lock(&ha->tgt.tgt_mutex); 836 spin_lock_irqsave(&ha->hardware_lock, flags); 837 tgt->tgt_stop = 1; 838 qlt_clear_tgt_db(tgt, true); 839 spin_unlock_irqrestore(&ha->hardware_lock, flags); 840 mutex_unlock(&ha->tgt.tgt_mutex); 841 842 flush_delayed_work(&tgt->sess_del_work); 843 844 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009, 845 "Waiting for sess works (tgt %p)", tgt); 846 spin_lock_irqsave(&tgt->sess_work_lock, flags); 847 while (!list_empty(&tgt->sess_works_list)) { 848 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 849 flush_scheduled_work(); 850 spin_lock_irqsave(&tgt->sess_work_lock, flags); 851 } 852 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 853 854 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a, 855 "Waiting for tgt %p: list_empty(sess_list)=%d " 856 "sess_count=%d\n", tgt, list_empty(&tgt->sess_list), 857 tgt->sess_count); 858 859 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 860 861 /* Big hammer */ 862 if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha)) 863 qlt_disable_vha(vha); 864 865 /* Wait for sessions to clear out (just in case) */ 866 wait_event(tgt->waitQ, test_tgt_sess_count(tgt)); 867 } 868 EXPORT_SYMBOL(qlt_stop_phase1); 869 870 /* Called by tcm_qla2xxx configfs code */ 871 void qlt_stop_phase2(struct qla_tgt *tgt) 872 { 873 struct qla_hw_data *ha = tgt->ha; 874 unsigned long flags; 875 876 if (tgt->tgt_stopped) { 877 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f, 878 "Already in tgt->tgt_stopped state\n"); 879 dump_stack(); 880 return; 881 } 882 883 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b, 884 "Waiting for %d IRQ commands to complete (tgt %p)", 885 tgt->irq_cmd_count, tgt); 886 887 mutex_lock(&ha->tgt.tgt_mutex); 888 spin_lock_irqsave(&ha->hardware_lock, flags); 889 while (tgt->irq_cmd_count != 0) { 890 spin_unlock_irqrestore(&ha->hardware_lock, flags); 891 udelay(2); 892 spin_lock_irqsave(&ha->hardware_lock, flags); 893 } 894 tgt->tgt_stop = 0; 895 tgt->tgt_stopped = 1; 896 spin_unlock_irqrestore(&ha->hardware_lock, flags); 897 mutex_unlock(&ha->tgt.tgt_mutex); 898 899 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished", 900 tgt); 901 } 902 EXPORT_SYMBOL(qlt_stop_phase2); 903 904 /* Called from qlt_remove_target() -> qla2x00_remove_one() */ 905 static void qlt_release(struct qla_tgt *tgt) 906 { 907 struct qla_hw_data *ha = tgt->ha; 908 909 if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped) 910 qlt_stop_phase2(tgt); 911 912 ha->tgt.qla_tgt = NULL; 913 914 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d, 915 "Release of tgt %p finished\n", tgt); 916 917 kfree(tgt); 918 } 919 920 /* ha->hardware_lock supposed to be held on entry */ 921 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type, 922 const void *param, unsigned int param_size) 923 { 924 struct qla_tgt_sess_work_param *prm; 925 unsigned long flags; 926 927 prm = kzalloc(sizeof(*prm), GFP_ATOMIC); 928 if (!prm) { 929 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050, 930 "qla_target(%d): Unable to create session " 931 "work, command will be refused", 0); 932 return -ENOMEM; 933 } 934 935 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e, 936 "Scheduling work (type %d, prm %p)" 937 " to find session for param %p (size %d, tgt %p)\n", 938 type, prm, param, param_size, tgt); 939 940 prm->type = type; 941 memcpy(&prm->tm_iocb, param, param_size); 942 943 spin_lock_irqsave(&tgt->sess_work_lock, flags); 944 list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list); 945 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 946 947 schedule_work(&tgt->sess_work); 948 949 return 0; 950 } 951 952 /* 953 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 954 */ 955 static void qlt_send_notify_ack(struct scsi_qla_host *vha, 956 struct imm_ntfy_from_isp *ntfy, 957 uint32_t add_flags, uint16_t resp_code, int resp_code_valid, 958 uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan) 959 { 960 struct qla_hw_data *ha = vha->hw; 961 request_t *pkt; 962 struct nack_to_isp *nack; 963 964 ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha); 965 966 /* Send marker if required */ 967 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 968 return; 969 970 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 971 if (!pkt) { 972 ql_dbg(ql_dbg_tgt, vha, 0xe049, 973 "qla_target(%d): %s failed: unable to allocate " 974 "request packet\n", vha->vp_idx, __func__); 975 return; 976 } 977 978 if (ha->tgt.qla_tgt != NULL) 979 ha->tgt.qla_tgt->notify_ack_expected++; 980 981 pkt->entry_type = NOTIFY_ACK_TYPE; 982 pkt->entry_count = 1; 983 984 nack = (struct nack_to_isp *)pkt; 985 nack->ox_id = ntfy->ox_id; 986 987 nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle; 988 if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) { 989 nack->u.isp24.flags = ntfy->u.isp24.flags & 990 __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB); 991 } 992 nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id; 993 nack->u.isp24.status = ntfy->u.isp24.status; 994 nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode; 995 nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle; 996 nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address; 997 nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs; 998 nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui; 999 nack->u.isp24.srr_flags = cpu_to_le16(srr_flags); 1000 nack->u.isp24.srr_reject_code = srr_reject_code; 1001 nack->u.isp24.srr_reject_code_expl = srr_explan; 1002 nack->u.isp24.vp_index = ntfy->u.isp24.vp_index; 1003 1004 ql_dbg(ql_dbg_tgt, vha, 0xe005, 1005 "qla_target(%d): Sending 24xx Notify Ack %d\n", 1006 vha->vp_idx, nack->u.isp24.status); 1007 1008 qla2x00_start_iocbs(vha, vha->req); 1009 } 1010 1011 /* 1012 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1013 */ 1014 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha, 1015 struct abts_recv_from_24xx *abts, uint32_t status, 1016 bool ids_reversed) 1017 { 1018 struct qla_hw_data *ha = vha->hw; 1019 struct abts_resp_to_24xx *resp; 1020 uint32_t f_ctl; 1021 uint8_t *p; 1022 1023 ql_dbg(ql_dbg_tgt, vha, 0xe006, 1024 "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n", 1025 ha, abts, status); 1026 1027 /* Send marker if required */ 1028 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1029 return; 1030 1031 resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL); 1032 if (!resp) { 1033 ql_dbg(ql_dbg_tgt, vha, 0xe04a, 1034 "qla_target(%d): %s failed: unable to allocate " 1035 "request packet", vha->vp_idx, __func__); 1036 return; 1037 } 1038 1039 resp->entry_type = ABTS_RESP_24XX; 1040 resp->entry_count = 1; 1041 resp->nport_handle = abts->nport_handle; 1042 resp->vp_index = vha->vp_idx; 1043 resp->sof_type = abts->sof_type; 1044 resp->exchange_address = abts->exchange_address; 1045 resp->fcp_hdr_le = abts->fcp_hdr_le; 1046 f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP | 1047 F_CTL_LAST_SEQ | F_CTL_END_SEQ | 1048 F_CTL_SEQ_INITIATIVE); 1049 p = (uint8_t *)&f_ctl; 1050 resp->fcp_hdr_le.f_ctl[0] = *p++; 1051 resp->fcp_hdr_le.f_ctl[1] = *p++; 1052 resp->fcp_hdr_le.f_ctl[2] = *p; 1053 if (ids_reversed) { 1054 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0]; 1055 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1]; 1056 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2]; 1057 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0]; 1058 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1]; 1059 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2]; 1060 } else { 1061 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0]; 1062 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1]; 1063 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2]; 1064 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0]; 1065 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1]; 1066 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2]; 1067 } 1068 resp->exchange_addr_to_abort = abts->exchange_addr_to_abort; 1069 if (status == FCP_TMF_CMPL) { 1070 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC; 1071 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID; 1072 resp->payload.ba_acct.low_seq_cnt = 0x0000; 1073 resp->payload.ba_acct.high_seq_cnt = 0xFFFF; 1074 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id; 1075 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id; 1076 } else { 1077 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT; 1078 resp->payload.ba_rjt.reason_code = 1079 BA_RJT_REASON_CODE_UNABLE_TO_PERFORM; 1080 /* Other bytes are zero */ 1081 } 1082 1083 ha->tgt.qla_tgt->abts_resp_expected++; 1084 1085 qla2x00_start_iocbs(vha, vha->req); 1086 } 1087 1088 /* 1089 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1090 */ 1091 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha, 1092 struct abts_resp_from_24xx_fw *entry) 1093 { 1094 struct ctio7_to_24xx *ctio; 1095 1096 ql_dbg(ql_dbg_tgt, vha, 0xe007, 1097 "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw); 1098 /* Send marker if required */ 1099 if (qlt_issue_marker(vha, 1) != QLA_SUCCESS) 1100 return; 1101 1102 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL); 1103 if (ctio == NULL) { 1104 ql_dbg(ql_dbg_tgt, vha, 0xe04b, 1105 "qla_target(%d): %s failed: unable to allocate " 1106 "request packet\n", vha->vp_idx, __func__); 1107 return; 1108 } 1109 1110 /* 1111 * We've got on entrance firmware's response on by us generated 1112 * ABTS response. So, in it ID fields are reversed. 1113 */ 1114 1115 ctio->entry_type = CTIO_TYPE7; 1116 ctio->entry_count = 1; 1117 ctio->nport_handle = entry->nport_handle; 1118 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1119 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1120 ctio->vp_index = vha->vp_idx; 1121 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0]; 1122 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1]; 1123 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2]; 1124 ctio->exchange_addr = entry->exchange_addr_to_abort; 1125 ctio->u.status1.flags = 1126 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1127 CTIO7_FLAGS_TERMINATE); 1128 ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id; 1129 1130 qla2x00_start_iocbs(vha, vha->req); 1131 1132 qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry, 1133 FCP_TMF_CMPL, true); 1134 } 1135 1136 /* ha->hardware_lock supposed to be held on entry */ 1137 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1138 struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess) 1139 { 1140 struct qla_hw_data *ha = vha->hw; 1141 struct se_session *se_sess = sess->se_sess; 1142 struct qla_tgt_mgmt_cmd *mcmd; 1143 struct se_cmd *se_cmd; 1144 u32 lun = 0; 1145 int rc; 1146 bool found_lun = false; 1147 1148 spin_lock(&se_sess->sess_cmd_lock); 1149 list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { 1150 struct qla_tgt_cmd *cmd = 1151 container_of(se_cmd, struct qla_tgt_cmd, se_cmd); 1152 if (cmd->tag == abts->exchange_addr_to_abort) { 1153 lun = cmd->unpacked_lun; 1154 found_lun = true; 1155 break; 1156 } 1157 } 1158 spin_unlock(&se_sess->sess_cmd_lock); 1159 1160 if (!found_lun) 1161 return -ENOENT; 1162 1163 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f, 1164 "qla_target(%d): task abort (tag=%d)\n", 1165 vha->vp_idx, abts->exchange_addr_to_abort); 1166 1167 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 1168 if (mcmd == NULL) { 1169 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051, 1170 "qla_target(%d): %s: Allocation of ABORT cmd failed", 1171 vha->vp_idx, __func__); 1172 return -ENOMEM; 1173 } 1174 memset(mcmd, 0, sizeof(*mcmd)); 1175 1176 mcmd->sess = sess; 1177 memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts)); 1178 1179 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK, 1180 abts->exchange_addr_to_abort); 1181 if (rc != 0) { 1182 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052, 1183 "qla_target(%d): tgt_ops->handle_tmr()" 1184 " failed: %d", vha->vp_idx, rc); 1185 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1186 return -EFAULT; 1187 } 1188 1189 return 0; 1190 } 1191 1192 /* 1193 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1194 */ 1195 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha, 1196 struct abts_recv_from_24xx *abts) 1197 { 1198 struct qla_hw_data *ha = vha->hw; 1199 struct qla_tgt_sess *sess; 1200 uint32_t tag = abts->exchange_addr_to_abort; 1201 uint8_t s_id[3]; 1202 int rc; 1203 1204 if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) { 1205 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053, 1206 "qla_target(%d): ABTS: Abort Sequence not " 1207 "supported\n", vha->vp_idx); 1208 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1209 return; 1210 } 1211 1212 if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) { 1213 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010, 1214 "qla_target(%d): ABTS: Unknown Exchange " 1215 "Address received\n", vha->vp_idx); 1216 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1217 return; 1218 } 1219 1220 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011, 1221 "qla_target(%d): task abort (s_id=%x:%x:%x, " 1222 "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2], 1223 abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag, 1224 le32_to_cpu(abts->fcp_hdr_le.parameter)); 1225 1226 s_id[0] = abts->fcp_hdr_le.s_id[2]; 1227 s_id[1] = abts->fcp_hdr_le.s_id[1]; 1228 s_id[2] = abts->fcp_hdr_le.s_id[0]; 1229 1230 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 1231 if (!sess) { 1232 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012, 1233 "qla_target(%d): task abort for non-existant session\n", 1234 vha->vp_idx); 1235 rc = qlt_sched_sess_work(ha->tgt.qla_tgt, 1236 QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts)); 1237 if (rc != 0) { 1238 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, 1239 false); 1240 } 1241 return; 1242 } 1243 1244 rc = __qlt_24xx_handle_abts(vha, abts, sess); 1245 if (rc != 0) { 1246 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054, 1247 "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n", 1248 vha->vp_idx, rc); 1249 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false); 1250 return; 1251 } 1252 } 1253 1254 /* 1255 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1256 */ 1257 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha, 1258 struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code) 1259 { 1260 struct atio_from_isp *atio = &mcmd->orig_iocb.atio; 1261 struct ctio7_to_24xx *ctio; 1262 1263 ql_dbg(ql_dbg_tgt, ha, 0xe008, 1264 "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n", 1265 ha, atio, resp_code); 1266 1267 /* Send marker if required */ 1268 if (qlt_issue_marker(ha, 1) != QLA_SUCCESS) 1269 return; 1270 1271 ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL); 1272 if (ctio == NULL) { 1273 ql_dbg(ql_dbg_tgt, ha, 0xe04c, 1274 "qla_target(%d): %s failed: unable to allocate " 1275 "request packet\n", ha->vp_idx, __func__); 1276 return; 1277 } 1278 1279 ctio->entry_type = CTIO_TYPE7; 1280 ctio->entry_count = 1; 1281 ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 1282 ctio->nport_handle = mcmd->sess->loop_id; 1283 ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1284 ctio->vp_index = ha->vp_idx; 1285 ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1286 ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1287 ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1288 ctio->exchange_addr = atio->u.isp24.exchange_addr; 1289 ctio->u.status1.flags = (atio->u.isp24.attr << 9) | 1290 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 1291 CTIO7_FLAGS_SEND_STATUS); 1292 ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 1293 ctio->u.status1.scsi_status = 1294 __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID); 1295 ctio->u.status1.response_len = __constant_cpu_to_le16(8); 1296 ctio->u.status1.sense_data[0] = resp_code; 1297 1298 qla2x00_start_iocbs(ha, ha->req); 1299 } 1300 1301 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) 1302 { 1303 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 1304 } 1305 EXPORT_SYMBOL(qlt_free_mcmd); 1306 1307 /* callback from target fabric module code */ 1308 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd) 1309 { 1310 struct scsi_qla_host *vha = mcmd->sess->vha; 1311 struct qla_hw_data *ha = vha->hw; 1312 unsigned long flags; 1313 1314 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013, 1315 "TM response mcmd (%p) status %#x state %#x", 1316 mcmd, mcmd->fc_tm_rsp, mcmd->flags); 1317 1318 spin_lock_irqsave(&ha->hardware_lock, flags); 1319 if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) 1320 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy, 1321 0, 0, 0, 0, 0, 0); 1322 else { 1323 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK) 1324 qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts, 1325 mcmd->fc_tm_rsp, false); 1326 else 1327 qlt_24xx_send_task_mgmt_ctio(vha, mcmd, 1328 mcmd->fc_tm_rsp); 1329 } 1330 /* 1331 * Make the callback for ->free_mcmd() to queue_work() and invoke 1332 * target_put_sess_cmd() to drop cmd_kref to 1. The final 1333 * target_put_sess_cmd() call will be made from TFO->check_stop_free() 1334 * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd 1335 * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() -> 1336 * qlt_xmit_tm_rsp() returns here.. 1337 */ 1338 ha->tgt.tgt_ops->free_mcmd(mcmd); 1339 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1340 } 1341 EXPORT_SYMBOL(qlt_xmit_tm_rsp); 1342 1343 /* No locks */ 1344 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm) 1345 { 1346 struct qla_tgt_cmd *cmd = prm->cmd; 1347 1348 BUG_ON(cmd->sg_cnt == 0); 1349 1350 prm->sg = (struct scatterlist *)cmd->sg; 1351 prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg, 1352 cmd->sg_cnt, cmd->dma_data_direction); 1353 if (unlikely(prm->seg_cnt == 0)) 1354 goto out_err; 1355 1356 prm->cmd->sg_mapped = 1; 1357 1358 /* 1359 * If greater than four sg entries then we need to allocate 1360 * the continuation entries 1361 */ 1362 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd) 1363 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt - 1364 prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont); 1365 1366 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n", 1367 prm->seg_cnt, prm->req_cnt); 1368 return 0; 1369 1370 out_err: 1371 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d, 1372 "qla_target(%d): PCI mapping failed: sg_cnt=%d", 1373 0, prm->cmd->sg_cnt); 1374 return -1; 1375 } 1376 1377 static inline void qlt_unmap_sg(struct scsi_qla_host *vha, 1378 struct qla_tgt_cmd *cmd) 1379 { 1380 struct qla_hw_data *ha = vha->hw; 1381 1382 BUG_ON(!cmd->sg_mapped); 1383 pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 1384 cmd->sg_mapped = 0; 1385 } 1386 1387 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha, 1388 uint32_t req_cnt) 1389 { 1390 struct qla_hw_data *ha = vha->hw; 1391 device_reg_t __iomem *reg = ha->iobase; 1392 uint32_t cnt; 1393 1394 if (vha->req->cnt < (req_cnt + 2)) { 1395 cnt = (uint16_t)RD_REG_DWORD(®->isp24.req_q_out); 1396 1397 ql_dbg(ql_dbg_tgt, vha, 0xe00a, 1398 "Request ring circled: cnt=%d, vha->->ring_index=%d, " 1399 "vha->req->cnt=%d, req_cnt=%d\n", cnt, 1400 vha->req->ring_index, vha->req->cnt, req_cnt); 1401 if (vha->req->ring_index < cnt) 1402 vha->req->cnt = cnt - vha->req->ring_index; 1403 else 1404 vha->req->cnt = vha->req->length - 1405 (vha->req->ring_index - cnt); 1406 } 1407 1408 if (unlikely(vha->req->cnt < (req_cnt + 2))) { 1409 ql_dbg(ql_dbg_tgt, vha, 0xe00b, 1410 "qla_target(%d): There is no room in the " 1411 "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, " 1412 "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index, 1413 vha->req->cnt, req_cnt); 1414 return -EAGAIN; 1415 } 1416 vha->req->cnt -= req_cnt; 1417 1418 return 0; 1419 } 1420 1421 /* 1422 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 1423 */ 1424 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha) 1425 { 1426 /* Adjust ring index. */ 1427 vha->req->ring_index++; 1428 if (vha->req->ring_index == vha->req->length) { 1429 vha->req->ring_index = 0; 1430 vha->req->ring_ptr = vha->req->ring; 1431 } else { 1432 vha->req->ring_ptr++; 1433 } 1434 return (cont_entry_t *)vha->req->ring_ptr; 1435 } 1436 1437 /* ha->hardware_lock supposed to be held on entry */ 1438 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha) 1439 { 1440 struct qla_hw_data *ha = vha->hw; 1441 uint32_t h; 1442 1443 h = ha->tgt.current_handle; 1444 /* always increment cmd handle */ 1445 do { 1446 ++h; 1447 if (h > DEFAULT_OUTSTANDING_COMMANDS) 1448 h = 1; /* 0 is QLA_TGT_NULL_HANDLE */ 1449 if (h == ha->tgt.current_handle) { 1450 ql_dbg(ql_dbg_tgt, vha, 0xe04e, 1451 "qla_target(%d): Ran out of " 1452 "empty cmd slots in ha %p\n", vha->vp_idx, ha); 1453 h = QLA_TGT_NULL_HANDLE; 1454 break; 1455 } 1456 } while ((h == QLA_TGT_NULL_HANDLE) || 1457 (h == QLA_TGT_SKIP_HANDLE) || 1458 (ha->tgt.cmds[h-1] != NULL)); 1459 1460 if (h != QLA_TGT_NULL_HANDLE) 1461 ha->tgt.current_handle = h; 1462 1463 return h; 1464 } 1465 1466 /* ha->hardware_lock supposed to be held on entry */ 1467 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm, 1468 struct scsi_qla_host *vha) 1469 { 1470 uint32_t h; 1471 struct ctio7_to_24xx *pkt; 1472 struct qla_hw_data *ha = vha->hw; 1473 struct atio_from_isp *atio = &prm->cmd->atio; 1474 1475 pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr; 1476 prm->pkt = pkt; 1477 memset(pkt, 0, sizeof(*pkt)); 1478 1479 pkt->entry_type = CTIO_TYPE7; 1480 pkt->entry_count = (uint8_t)prm->req_cnt; 1481 pkt->vp_index = vha->vp_idx; 1482 1483 h = qlt_make_handle(vha); 1484 if (unlikely(h == QLA_TGT_NULL_HANDLE)) { 1485 /* 1486 * CTIO type 7 from the firmware doesn't provide a way to 1487 * know the initiator's LOOP ID, hence we can't find 1488 * the session and, so, the command. 1489 */ 1490 return -EAGAIN; 1491 } else 1492 ha->tgt.cmds[h-1] = prm->cmd; 1493 1494 pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK; 1495 pkt->nport_handle = prm->cmd->loop_id; 1496 pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 1497 pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 1498 pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 1499 pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 1500 pkt->exchange_addr = atio->u.isp24.exchange_addr; 1501 pkt->u.status0.flags |= (atio->u.isp24.attr << 9); 1502 pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 1503 pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset); 1504 1505 ql_dbg(ql_dbg_tgt, vha, 0xe00c, 1506 "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n", 1507 vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT, 1508 le16_to_cpu(pkt->u.status0.ox_id)); 1509 return 0; 1510 } 1511 1512 /* 1513 * ha->hardware_lock supposed to be held on entry. We have already made sure 1514 * that there is sufficient amount of request entries to not drop it. 1515 */ 1516 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm, 1517 struct scsi_qla_host *vha) 1518 { 1519 int cnt; 1520 uint32_t *dword_ptr; 1521 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1522 1523 /* Build continuation packets */ 1524 while (prm->seg_cnt > 0) { 1525 cont_a64_entry_t *cont_pkt64 = 1526 (cont_a64_entry_t *)qlt_get_req_pkt(vha); 1527 1528 /* 1529 * Make sure that from cont_pkt64 none of 1530 * 64-bit specific fields used for 32-bit 1531 * addressing. Cast to (cont_entry_t *) for 1532 * that. 1533 */ 1534 1535 memset(cont_pkt64, 0, sizeof(*cont_pkt64)); 1536 1537 cont_pkt64->entry_count = 1; 1538 cont_pkt64->sys_define = 0; 1539 1540 if (enable_64bit_addressing) { 1541 cont_pkt64->entry_type = CONTINUE_A64_TYPE; 1542 dword_ptr = 1543 (uint32_t *)&cont_pkt64->dseg_0_address; 1544 } else { 1545 cont_pkt64->entry_type = CONTINUE_TYPE; 1546 dword_ptr = 1547 (uint32_t *)&((cont_entry_t *) 1548 cont_pkt64)->dseg_0_address; 1549 } 1550 1551 /* Load continuation entry data segments */ 1552 for (cnt = 0; 1553 cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt; 1554 cnt++, prm->seg_cnt--) { 1555 *dword_ptr++ = 1556 cpu_to_le32(pci_dma_lo32 1557 (sg_dma_address(prm->sg))); 1558 if (enable_64bit_addressing) { 1559 *dword_ptr++ = 1560 cpu_to_le32(pci_dma_hi32 1561 (sg_dma_address 1562 (prm->sg))); 1563 } 1564 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1565 1566 ql_dbg(ql_dbg_tgt, vha, 0xe00d, 1567 "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n", 1568 (long long unsigned int) 1569 pci_dma_hi32(sg_dma_address(prm->sg)), 1570 (long long unsigned int) 1571 pci_dma_lo32(sg_dma_address(prm->sg)), 1572 (int)sg_dma_len(prm->sg)); 1573 1574 prm->sg = sg_next(prm->sg); 1575 } 1576 } 1577 } 1578 1579 /* 1580 * ha->hardware_lock supposed to be held on entry. We have already made sure 1581 * that there is sufficient amount of request entries to not drop it. 1582 */ 1583 static void qlt_load_data_segments(struct qla_tgt_prm *prm, 1584 struct scsi_qla_host *vha) 1585 { 1586 int cnt; 1587 uint32_t *dword_ptr; 1588 int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr; 1589 struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt; 1590 1591 ql_dbg(ql_dbg_tgt, vha, 0xe00e, 1592 "iocb->scsi_status=%x, iocb->flags=%x\n", 1593 le16_to_cpu(pkt24->u.status0.scsi_status), 1594 le16_to_cpu(pkt24->u.status0.flags)); 1595 1596 pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen); 1597 1598 /* Setup packet address segment pointer */ 1599 dword_ptr = pkt24->u.status0.dseg_0_address; 1600 1601 /* Set total data segment count */ 1602 if (prm->seg_cnt) 1603 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt); 1604 1605 if (prm->seg_cnt == 0) { 1606 /* No data transfer */ 1607 *dword_ptr++ = 0; 1608 *dword_ptr = 0; 1609 return; 1610 } 1611 1612 /* If scatter gather */ 1613 ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments..."); 1614 1615 /* Load command entry data segments */ 1616 for (cnt = 0; 1617 (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt; 1618 cnt++, prm->seg_cnt--) { 1619 *dword_ptr++ = 1620 cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg))); 1621 if (enable_64bit_addressing) { 1622 *dword_ptr++ = 1623 cpu_to_le32(pci_dma_hi32( 1624 sg_dma_address(prm->sg))); 1625 } 1626 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg)); 1627 1628 ql_dbg(ql_dbg_tgt, vha, 0xe010, 1629 "S/G Segment phys_addr=%llx:%llx, len=%d\n", 1630 (long long unsigned int)pci_dma_hi32(sg_dma_address( 1631 prm->sg)), 1632 (long long unsigned int)pci_dma_lo32(sg_dma_address( 1633 prm->sg)), 1634 (int)sg_dma_len(prm->sg)); 1635 1636 prm->sg = sg_next(prm->sg); 1637 } 1638 1639 qlt_load_cont_data_segments(prm, vha); 1640 } 1641 1642 static inline int qlt_has_data(struct qla_tgt_cmd *cmd) 1643 { 1644 return cmd->bufflen > 0; 1645 } 1646 1647 /* 1648 * Called without ha->hardware_lock held 1649 */ 1650 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd, 1651 struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status, 1652 uint32_t *full_req_cnt) 1653 { 1654 struct qla_tgt *tgt = cmd->tgt; 1655 struct scsi_qla_host *vha = tgt->vha; 1656 struct qla_hw_data *ha = vha->hw; 1657 struct se_cmd *se_cmd = &cmd->se_cmd; 1658 1659 if (unlikely(cmd->aborted)) { 1660 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014, 1661 "qla_target(%d): terminating exchange " 1662 "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd, 1663 se_cmd, cmd->tag); 1664 1665 cmd->state = QLA_TGT_STATE_ABORTED; 1666 1667 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0); 1668 1669 /* !! At this point cmd could be already freed !! */ 1670 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED; 1671 } 1672 1673 ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n", 1674 vha->vp_idx, cmd->tag); 1675 1676 prm->cmd = cmd; 1677 prm->tgt = tgt; 1678 prm->rq_result = scsi_status; 1679 prm->sense_buffer = &cmd->sense_buffer[0]; 1680 prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER; 1681 prm->sg = NULL; 1682 prm->seg_cnt = -1; 1683 prm->req_cnt = 1; 1684 prm->add_status_pkt = 0; 1685 1686 ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n", 1687 prm->rq_result, xmit_type); 1688 1689 /* Send marker if required */ 1690 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 1691 return -EFAULT; 1692 1693 ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx); 1694 1695 if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) { 1696 if (qlt_pci_map_calc_cnt(prm) != 0) 1697 return -EAGAIN; 1698 } 1699 1700 *full_req_cnt = prm->req_cnt; 1701 1702 if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { 1703 prm->residual = se_cmd->residual_count; 1704 ql_dbg(ql_dbg_tgt, vha, 0xe014, 1705 "Residual underflow: %d (tag %d, " 1706 "op %x, bufflen %d, rq_result %x)\n", prm->residual, 1707 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1708 cmd->bufflen, prm->rq_result); 1709 prm->rq_result |= SS_RESIDUAL_UNDER; 1710 } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 1711 prm->residual = se_cmd->residual_count; 1712 ql_dbg(ql_dbg_tgt, vha, 0xe015, 1713 "Residual overflow: %d (tag %d, " 1714 "op %x, bufflen %d, rq_result %x)\n", prm->residual, 1715 cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0, 1716 cmd->bufflen, prm->rq_result); 1717 prm->rq_result |= SS_RESIDUAL_OVER; 1718 } 1719 1720 if (xmit_type & QLA_TGT_XMIT_STATUS) { 1721 /* 1722 * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be 1723 * ignored in *xmit_response() below 1724 */ 1725 if (qlt_has_data(cmd)) { 1726 if (QLA_TGT_SENSE_VALID(prm->sense_buffer) || 1727 (IS_FWI2_CAPABLE(ha) && 1728 (prm->rq_result != 0))) { 1729 prm->add_status_pkt = 1; 1730 (*full_req_cnt)++; 1731 } 1732 } 1733 } 1734 1735 ql_dbg(ql_dbg_tgt, vha, 0xe016, 1736 "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n", 1737 prm->req_cnt, *full_req_cnt, prm->add_status_pkt); 1738 1739 return 0; 1740 } 1741 1742 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha, 1743 struct qla_tgt_cmd *cmd, int sending_sense) 1744 { 1745 if (ha->tgt.enable_class_2) 1746 return 0; 1747 1748 if (sending_sense) 1749 return cmd->conf_compl_supported; 1750 else 1751 return ha->tgt.enable_explicit_conf && 1752 cmd->conf_compl_supported; 1753 } 1754 1755 #ifdef CONFIG_QLA_TGT_DEBUG_SRR 1756 /* 1757 * Original taken from the XFS code 1758 */ 1759 static unsigned long qlt_srr_random(void) 1760 { 1761 static int Inited; 1762 static unsigned long RandomValue; 1763 static DEFINE_SPINLOCK(lock); 1764 /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */ 1765 register long rv; 1766 register long lo; 1767 register long hi; 1768 unsigned long flags; 1769 1770 spin_lock_irqsave(&lock, flags); 1771 if (!Inited) { 1772 RandomValue = jiffies; 1773 Inited = 1; 1774 } 1775 rv = RandomValue; 1776 hi = rv / 127773; 1777 lo = rv % 127773; 1778 rv = 16807 * lo - 2836 * hi; 1779 if (rv <= 0) 1780 rv += 2147483647; 1781 RandomValue = rv; 1782 spin_unlock_irqrestore(&lock, flags); 1783 return rv; 1784 } 1785 1786 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1787 { 1788 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */ 1789 if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200) 1790 == 50) { 1791 *xmit_type &= ~QLA_TGT_XMIT_STATUS; 1792 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015, 1793 "Dropping cmd %p (tag %d) status", cmd, cmd->tag); 1794 } 1795 #endif 1796 /* 1797 * It's currently not possible to simulate SRRs for FCP_WRITE without 1798 * a physical link layer failure, so don't even try here.. 1799 */ 1800 if (cmd->dma_data_direction != DMA_FROM_DEVICE) 1801 return; 1802 1803 if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) && 1804 ((qlt_srr_random() % 100) == 20)) { 1805 int i, leave = 0; 1806 unsigned int tot_len = 0; 1807 1808 while (leave == 0) 1809 leave = qlt_srr_random() % cmd->sg_cnt; 1810 1811 for (i = 0; i < leave; i++) 1812 tot_len += cmd->sg[i].length; 1813 1814 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016, 1815 "Cutting cmd %p (tag %d) buffer" 1816 " tail to len %d, sg_cnt %d (cmd->bufflen %d," 1817 " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave, 1818 cmd->bufflen, cmd->sg_cnt); 1819 1820 cmd->bufflen = tot_len; 1821 cmd->sg_cnt = leave; 1822 } 1823 1824 if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) { 1825 unsigned int offset = qlt_srr_random() % cmd->bufflen; 1826 1827 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017, 1828 "Cutting cmd %p (tag %d) buffer head " 1829 "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset, 1830 cmd->bufflen); 1831 if (offset == 0) 1832 *xmit_type &= ~QLA_TGT_XMIT_DATA; 1833 else if (qlt_set_data_offset(cmd, offset)) { 1834 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018, 1835 "qlt_set_data_offset() failed (tag %d)", cmd->tag); 1836 } 1837 } 1838 } 1839 #else 1840 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type) 1841 {} 1842 #endif 1843 1844 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio, 1845 struct qla_tgt_prm *prm) 1846 { 1847 prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len, 1848 (uint32_t)sizeof(ctio->u.status1.sense_data)); 1849 ctio->u.status0.flags |= 1850 __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS); 1851 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) { 1852 ctio->u.status0.flags |= __constant_cpu_to_le16( 1853 CTIO7_FLAGS_EXPLICIT_CONFORM | 1854 CTIO7_FLAGS_CONFORM_REQ); 1855 } 1856 ctio->u.status0.residual = cpu_to_le32(prm->residual); 1857 ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result); 1858 if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) { 1859 int i; 1860 1861 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) { 1862 if (prm->cmd->se_cmd.scsi_status != 0) { 1863 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017, 1864 "Skipping EXPLICIT_CONFORM and " 1865 "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ " 1866 "non GOOD status\n"); 1867 goto skip_explict_conf; 1868 } 1869 ctio->u.status1.flags |= __constant_cpu_to_le16( 1870 CTIO7_FLAGS_EXPLICIT_CONFORM | 1871 CTIO7_FLAGS_CONFORM_REQ); 1872 } 1873 skip_explict_conf: 1874 ctio->u.status1.flags &= 1875 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 1876 ctio->u.status1.flags |= 1877 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 1878 ctio->u.status1.scsi_status |= 1879 __constant_cpu_to_le16(SS_SENSE_LEN_VALID); 1880 ctio->u.status1.sense_length = 1881 cpu_to_le16(prm->sense_buffer_len); 1882 for (i = 0; i < prm->sense_buffer_len/4; i++) 1883 ((uint32_t *)ctio->u.status1.sense_data)[i] = 1884 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]); 1885 #if 0 1886 if (unlikely((prm->sense_buffer_len % 4) != 0)) { 1887 static int q; 1888 if (q < 10) { 1889 ql_dbg(ql_dbg_tgt, vha, 0xe04f, 1890 "qla_target(%d): %d bytes of sense " 1891 "lost", prm->tgt->ha->vp_idx, 1892 prm->sense_buffer_len % 4); 1893 q++; 1894 } 1895 } 1896 #endif 1897 } else { 1898 ctio->u.status1.flags &= 1899 ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0); 1900 ctio->u.status1.flags |= 1901 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1); 1902 ctio->u.status1.sense_length = 0; 1903 memset(ctio->u.status1.sense_data, 0, 1904 sizeof(ctio->u.status1.sense_data)); 1905 } 1906 1907 /* Sense with len > 24, is it possible ??? */ 1908 } 1909 1910 /* 1911 * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and * 1912 * QLA_TGT_XMIT_STATUS for >= 24xx silicon 1913 */ 1914 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, 1915 uint8_t scsi_status) 1916 { 1917 struct scsi_qla_host *vha = cmd->vha; 1918 struct qla_hw_data *ha = vha->hw; 1919 struct ctio7_to_24xx *pkt; 1920 struct qla_tgt_prm prm; 1921 uint32_t full_req_cnt = 0; 1922 unsigned long flags = 0; 1923 int res; 1924 1925 memset(&prm, 0, sizeof(prm)); 1926 qlt_check_srr_debug(cmd, &xmit_type); 1927 1928 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018, 1929 "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, " 1930 "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ? 1931 1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction); 1932 1933 res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status, 1934 &full_req_cnt); 1935 if (unlikely(res != 0)) { 1936 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED) 1937 return 0; 1938 1939 return res; 1940 } 1941 1942 spin_lock_irqsave(&ha->hardware_lock, flags); 1943 1944 /* Does F/W have an IOCBs for this request */ 1945 res = qlt_check_reserve_free_req(vha, full_req_cnt); 1946 if (unlikely(res)) 1947 goto out_unmap_unlock; 1948 1949 res = qlt_24xx_build_ctio_pkt(&prm, vha); 1950 if (unlikely(res != 0)) 1951 goto out_unmap_unlock; 1952 1953 1954 pkt = (struct ctio7_to_24xx *)prm.pkt; 1955 1956 if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) { 1957 pkt->u.status0.flags |= 1958 __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN | 1959 CTIO7_FLAGS_STATUS_MODE_0); 1960 1961 qlt_load_data_segments(&prm, vha); 1962 1963 if (prm.add_status_pkt == 0) { 1964 if (xmit_type & QLA_TGT_XMIT_STATUS) { 1965 pkt->u.status0.scsi_status = 1966 cpu_to_le16(prm.rq_result); 1967 pkt->u.status0.residual = 1968 cpu_to_le32(prm.residual); 1969 pkt->u.status0.flags |= __constant_cpu_to_le16( 1970 CTIO7_FLAGS_SEND_STATUS); 1971 if (qlt_need_explicit_conf(ha, cmd, 0)) { 1972 pkt->u.status0.flags |= 1973 __constant_cpu_to_le16( 1974 CTIO7_FLAGS_EXPLICIT_CONFORM | 1975 CTIO7_FLAGS_CONFORM_REQ); 1976 } 1977 } 1978 1979 } else { 1980 /* 1981 * We have already made sure that there is sufficient 1982 * amount of request entries to not drop HW lock in 1983 * req_pkt(). 1984 */ 1985 struct ctio7_to_24xx *ctio = 1986 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha); 1987 1988 ql_dbg(ql_dbg_tgt, vha, 0xe019, 1989 "Building additional status packet\n"); 1990 1991 memcpy(ctio, pkt, sizeof(*ctio)); 1992 ctio->entry_count = 1; 1993 ctio->dseg_count = 0; 1994 ctio->u.status1.flags &= ~__constant_cpu_to_le16( 1995 CTIO7_FLAGS_DATA_IN); 1996 1997 /* Real finish is ctio_m1's finish */ 1998 pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK; 1999 pkt->u.status0.flags |= __constant_cpu_to_le16( 2000 CTIO7_FLAGS_DONT_RET_CTIO); 2001 qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio, 2002 &prm); 2003 pr_debug("Status CTIO7: %p\n", ctio); 2004 } 2005 } else 2006 qlt_24xx_init_ctio_to_isp(pkt, &prm); 2007 2008 2009 cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ 2010 2011 ql_dbg(ql_dbg_tgt, vha, 0xe01a, 2012 "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n", 2013 pkt, scsi_status); 2014 2015 qla2x00_start_iocbs(vha, vha->req); 2016 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2017 2018 return 0; 2019 2020 out_unmap_unlock: 2021 if (cmd->sg_mapped) 2022 qlt_unmap_sg(vha, cmd); 2023 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2024 2025 return res; 2026 } 2027 EXPORT_SYMBOL(qlt_xmit_response); 2028 2029 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) 2030 { 2031 struct ctio7_to_24xx *pkt; 2032 struct scsi_qla_host *vha = cmd->vha; 2033 struct qla_hw_data *ha = vha->hw; 2034 struct qla_tgt *tgt = cmd->tgt; 2035 struct qla_tgt_prm prm; 2036 unsigned long flags; 2037 int res = 0; 2038 2039 memset(&prm, 0, sizeof(prm)); 2040 prm.cmd = cmd; 2041 prm.tgt = tgt; 2042 prm.sg = NULL; 2043 prm.req_cnt = 1; 2044 2045 /* Send marker if required */ 2046 if (qlt_issue_marker(vha, 0) != QLA_SUCCESS) 2047 return -EIO; 2048 2049 ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)", 2050 (int)vha->vp_idx); 2051 2052 /* Calculate number of entries and segments required */ 2053 if (qlt_pci_map_calc_cnt(&prm) != 0) 2054 return -EAGAIN; 2055 2056 spin_lock_irqsave(&ha->hardware_lock, flags); 2057 2058 /* Does F/W have an IOCBs for this request */ 2059 res = qlt_check_reserve_free_req(vha, prm.req_cnt); 2060 if (res != 0) 2061 goto out_unlock_free_unmap; 2062 2063 res = qlt_24xx_build_ctio_pkt(&prm, vha); 2064 if (unlikely(res != 0)) 2065 goto out_unlock_free_unmap; 2066 pkt = (struct ctio7_to_24xx *)prm.pkt; 2067 pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT | 2068 CTIO7_FLAGS_STATUS_MODE_0); 2069 qlt_load_data_segments(&prm, vha); 2070 2071 cmd->state = QLA_TGT_STATE_NEED_DATA; 2072 2073 qla2x00_start_iocbs(vha, vha->req); 2074 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2075 2076 return res; 2077 2078 out_unlock_free_unmap: 2079 if (cmd->sg_mapped) 2080 qlt_unmap_sg(vha, cmd); 2081 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2082 2083 return res; 2084 } 2085 EXPORT_SYMBOL(qlt_rdy_to_xfer); 2086 2087 /* If hardware_lock held on entry, might drop it, then reaquire */ 2088 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */ 2089 static int __qlt_send_term_exchange(struct scsi_qla_host *vha, 2090 struct qla_tgt_cmd *cmd, 2091 struct atio_from_isp *atio) 2092 { 2093 struct ctio7_to_24xx *ctio24; 2094 struct qla_hw_data *ha = vha->hw; 2095 request_t *pkt; 2096 int ret = 0; 2097 2098 ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha); 2099 2100 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 2101 if (pkt == NULL) { 2102 ql_dbg(ql_dbg_tgt, vha, 0xe050, 2103 "qla_target(%d): %s failed: unable to allocate " 2104 "request packet\n", vha->vp_idx, __func__); 2105 return -ENOMEM; 2106 } 2107 2108 if (cmd != NULL) { 2109 if (cmd->state < QLA_TGT_STATE_PROCESSED) { 2110 ql_dbg(ql_dbg_tgt, vha, 0xe051, 2111 "qla_target(%d): Terminating cmd %p with " 2112 "incorrect state %d\n", vha->vp_idx, cmd, 2113 cmd->state); 2114 } else 2115 ret = 1; 2116 } 2117 2118 pkt->entry_count = 1; 2119 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 2120 2121 ctio24 = (struct ctio7_to_24xx *)pkt; 2122 ctio24->entry_type = CTIO_TYPE7; 2123 ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED; 2124 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 2125 ctio24->vp_index = vha->vp_idx; 2126 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 2127 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 2128 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 2129 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 2130 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 2131 __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | 2132 CTIO7_FLAGS_TERMINATE); 2133 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 2134 2135 /* Most likely, it isn't needed */ 2136 ctio24->u.status1.residual = get_unaligned((uint32_t *) 2137 &atio->u.isp24.fcp_cmnd.add_cdb[ 2138 atio->u.isp24.fcp_cmnd.add_cdb_len]); 2139 if (ctio24->u.status1.residual != 0) 2140 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 2141 2142 qla2x00_start_iocbs(vha, vha->req); 2143 return ret; 2144 } 2145 2146 static void qlt_send_term_exchange(struct scsi_qla_host *vha, 2147 struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked) 2148 { 2149 unsigned long flags; 2150 int rc; 2151 2152 if (qlt_issue_marker(vha, ha_locked) < 0) 2153 return; 2154 2155 if (ha_locked) { 2156 rc = __qlt_send_term_exchange(vha, cmd, atio); 2157 goto done; 2158 } 2159 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 2160 rc = __qlt_send_term_exchange(vha, cmd, atio); 2161 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 2162 done: 2163 if (rc == 1) { 2164 if (!ha_locked && !in_interrupt()) 2165 msleep(250); /* just in case */ 2166 2167 vha->hw->tgt.tgt_ops->free_cmd(cmd); 2168 } 2169 } 2170 2171 void qlt_free_cmd(struct qla_tgt_cmd *cmd) 2172 { 2173 BUG_ON(cmd->sg_mapped); 2174 2175 if (unlikely(cmd->free_sg)) 2176 kfree(cmd->sg); 2177 kmem_cache_free(qla_tgt_cmd_cachep, cmd); 2178 } 2179 EXPORT_SYMBOL(qlt_free_cmd); 2180 2181 /* ha->hardware_lock supposed to be held on entry */ 2182 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha, 2183 struct qla_tgt_cmd *cmd, void *ctio) 2184 { 2185 struct qla_tgt_srr_ctio *sc; 2186 struct qla_hw_data *ha = vha->hw; 2187 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2188 struct qla_tgt_srr_imm *imm; 2189 2190 tgt->ctio_srr_id++; 2191 2192 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019, 2193 "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx); 2194 2195 if (!ctio) { 2196 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055, 2197 "qla_target(%d): SRR CTIO, but ctio is NULL\n", 2198 vha->vp_idx); 2199 return -EINVAL; 2200 } 2201 2202 sc = kzalloc(sizeof(*sc), GFP_ATOMIC); 2203 if (sc != NULL) { 2204 sc->cmd = cmd; 2205 /* IRQ is already OFF */ 2206 spin_lock(&tgt->srr_lock); 2207 sc->srr_id = tgt->ctio_srr_id; 2208 list_add_tail(&sc->srr_list_entry, 2209 &tgt->srr_ctio_list); 2210 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a, 2211 "CTIO SRR %p added (id %d)\n", sc, sc->srr_id); 2212 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 2213 int found = 0; 2214 list_for_each_entry(imm, &tgt->srr_imm_list, 2215 srr_list_entry) { 2216 if (imm->srr_id == sc->srr_id) { 2217 found = 1; 2218 break; 2219 } 2220 } 2221 if (found) { 2222 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b, 2223 "Scheduling srr work\n"); 2224 schedule_work(&tgt->srr_work); 2225 } else { 2226 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056, 2227 "qla_target(%d): imm_srr_id " 2228 "== ctio_srr_id (%d), but there is no " 2229 "corresponding SRR IMM, deleting CTIO " 2230 "SRR %p\n", vha->vp_idx, 2231 tgt->ctio_srr_id, sc); 2232 list_del(&sc->srr_list_entry); 2233 spin_unlock(&tgt->srr_lock); 2234 2235 kfree(sc); 2236 return -EINVAL; 2237 } 2238 } 2239 spin_unlock(&tgt->srr_lock); 2240 } else { 2241 struct qla_tgt_srr_imm *ti; 2242 2243 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057, 2244 "qla_target(%d): Unable to allocate SRR CTIO entry\n", 2245 vha->vp_idx); 2246 spin_lock(&tgt->srr_lock); 2247 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list, 2248 srr_list_entry) { 2249 if (imm->srr_id == tgt->ctio_srr_id) { 2250 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c, 2251 "IMM SRR %p deleted (id %d)\n", 2252 imm, imm->srr_id); 2253 list_del(&imm->srr_list_entry); 2254 qlt_reject_free_srr_imm(vha, imm, 1); 2255 } 2256 } 2257 spin_unlock(&tgt->srr_lock); 2258 2259 return -ENOMEM; 2260 } 2261 2262 return 0; 2263 } 2264 2265 /* 2266 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2267 */ 2268 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio, 2269 struct qla_tgt_cmd *cmd, uint32_t status) 2270 { 2271 int term = 0; 2272 2273 if (ctio != NULL) { 2274 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio; 2275 term = !(c->flags & 2276 __constant_cpu_to_le16(OF_TERM_EXCH)); 2277 } else 2278 term = 1; 2279 2280 if (term) 2281 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 2282 2283 return term; 2284 } 2285 2286 /* ha->hardware_lock supposed to be held on entry */ 2287 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha, 2288 uint32_t handle) 2289 { 2290 struct qla_hw_data *ha = vha->hw; 2291 2292 handle--; 2293 if (ha->tgt.cmds[handle] != NULL) { 2294 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle]; 2295 ha->tgt.cmds[handle] = NULL; 2296 return cmd; 2297 } else 2298 return NULL; 2299 } 2300 2301 /* ha->hardware_lock supposed to be held on entry */ 2302 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha, 2303 uint32_t handle, void *ctio) 2304 { 2305 struct qla_tgt_cmd *cmd = NULL; 2306 2307 /* Clear out internal marks */ 2308 handle &= ~(CTIO_COMPLETION_HANDLE_MARK | 2309 CTIO_INTERMEDIATE_HANDLE_MARK); 2310 2311 if (handle != QLA_TGT_NULL_HANDLE) { 2312 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) { 2313 ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s", 2314 "SKIP_HANDLE CTIO\n"); 2315 return NULL; 2316 } 2317 /* handle-1 is actually used */ 2318 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) { 2319 ql_dbg(ql_dbg_tgt, vha, 0xe052, 2320 "qla_target(%d): Wrong handle %x received\n", 2321 vha->vp_idx, handle); 2322 return NULL; 2323 } 2324 cmd = qlt_get_cmd(vha, handle); 2325 if (unlikely(cmd == NULL)) { 2326 ql_dbg(ql_dbg_tgt, vha, 0xe053, 2327 "qla_target(%d): Suspicious: unable to " 2328 "find the command with handle %x\n", vha->vp_idx, 2329 handle); 2330 return NULL; 2331 } 2332 } else if (ctio != NULL) { 2333 /* We can't get loop ID from CTIO7 */ 2334 ql_dbg(ql_dbg_tgt, vha, 0xe054, 2335 "qla_target(%d): Wrong CTIO received: QLA24xx doesn't " 2336 "support NULL handles\n", vha->vp_idx); 2337 return NULL; 2338 } 2339 2340 return cmd; 2341 } 2342 2343 /* 2344 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2345 */ 2346 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle, 2347 uint32_t status, void *ctio) 2348 { 2349 struct qla_hw_data *ha = vha->hw; 2350 struct se_cmd *se_cmd; 2351 struct target_core_fabric_ops *tfo; 2352 struct qla_tgt_cmd *cmd; 2353 2354 ql_dbg(ql_dbg_tgt, vha, 0xe01e, 2355 "qla_target(%d): handle(ctio %p status %#x) <- %08x\n", 2356 vha->vp_idx, ctio, status, handle); 2357 2358 if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) { 2359 /* That could happen only in case of an error/reset/abort */ 2360 if (status != CTIO_SUCCESS) { 2361 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d, 2362 "Intermediate CTIO received" 2363 " (status %x)\n", status); 2364 } 2365 return; 2366 } 2367 2368 cmd = qlt_ctio_to_cmd(vha, handle, ctio); 2369 if (cmd == NULL) 2370 return; 2371 2372 se_cmd = &cmd->se_cmd; 2373 tfo = se_cmd->se_tfo; 2374 2375 if (cmd->sg_mapped) 2376 qlt_unmap_sg(vha, cmd); 2377 2378 if (unlikely(status != CTIO_SUCCESS)) { 2379 switch (status & 0xFFFF) { 2380 case CTIO_LIP_RESET: 2381 case CTIO_TARGET_RESET: 2382 case CTIO_ABORTED: 2383 case CTIO_TIMEOUT: 2384 case CTIO_INVALID_RX_ID: 2385 /* They are OK */ 2386 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058, 2387 "qla_target(%d): CTIO with " 2388 "status %#x received, state %x, se_cmd %p, " 2389 "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, " 2390 "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx, 2391 status, cmd->state, se_cmd); 2392 break; 2393 2394 case CTIO_PORT_LOGGED_OUT: 2395 case CTIO_PORT_UNAVAILABLE: 2396 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059, 2397 "qla_target(%d): CTIO with PORT LOGGED " 2398 "OUT (29) or PORT UNAVAILABLE (28) status %x " 2399 "received (state %x, se_cmd %p)\n", vha->vp_idx, 2400 status, cmd->state, se_cmd); 2401 break; 2402 2403 case CTIO_SRR_RECEIVED: 2404 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a, 2405 "qla_target(%d): CTIO with SRR_RECEIVED" 2406 " status %x received (state %x, se_cmd %p)\n", 2407 vha->vp_idx, status, cmd->state, se_cmd); 2408 if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0) 2409 break; 2410 else 2411 return; 2412 2413 default: 2414 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b, 2415 "qla_target(%d): CTIO with error status " 2416 "0x%x received (state %x, se_cmd %p\n", 2417 vha->vp_idx, status, cmd->state, se_cmd); 2418 break; 2419 } 2420 2421 if (cmd->state != QLA_TGT_STATE_NEED_DATA) 2422 if (qlt_term_ctio_exchange(vha, ctio, cmd, status)) 2423 return; 2424 } 2425 2426 if (cmd->state == QLA_TGT_STATE_PROCESSED) { 2427 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd); 2428 } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 2429 int rx_status = 0; 2430 2431 cmd->state = QLA_TGT_STATE_DATA_IN; 2432 2433 if (unlikely(status != CTIO_SUCCESS)) 2434 rx_status = -EIO; 2435 else 2436 cmd->write_data_transferred = 1; 2437 2438 ql_dbg(ql_dbg_tgt, vha, 0xe020, 2439 "Data received, context %x, rx_status %d\n", 2440 0x0, rx_status); 2441 2442 ha->tgt.tgt_ops->handle_data(cmd); 2443 return; 2444 } else if (cmd->state == QLA_TGT_STATE_ABORTED) { 2445 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e, 2446 "Aborted command %p (tag %d) finished\n", cmd, cmd->tag); 2447 } else { 2448 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c, 2449 "qla_target(%d): A command in state (%d) should " 2450 "not return a CTIO complete\n", vha->vp_idx, cmd->state); 2451 } 2452 2453 if (unlikely(status != CTIO_SUCCESS)) { 2454 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n"); 2455 dump_stack(); 2456 } 2457 2458 ha->tgt.tgt_ops->free_cmd(cmd); 2459 } 2460 2461 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha, 2462 uint8_t task_codes) 2463 { 2464 int fcp_task_attr; 2465 2466 switch (task_codes) { 2467 case ATIO_SIMPLE_QUEUE: 2468 fcp_task_attr = MSG_SIMPLE_TAG; 2469 break; 2470 case ATIO_HEAD_OF_QUEUE: 2471 fcp_task_attr = MSG_HEAD_TAG; 2472 break; 2473 case ATIO_ORDERED_QUEUE: 2474 fcp_task_attr = MSG_ORDERED_TAG; 2475 break; 2476 case ATIO_ACA_QUEUE: 2477 fcp_task_attr = MSG_ACA_TAG; 2478 break; 2479 case ATIO_UNTAGGED: 2480 fcp_task_attr = MSG_SIMPLE_TAG; 2481 break; 2482 default: 2483 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d, 2484 "qla_target: unknown task code %x, use ORDERED instead\n", 2485 task_codes); 2486 fcp_task_attr = MSG_ORDERED_TAG; 2487 break; 2488 } 2489 2490 return fcp_task_attr; 2491 } 2492 2493 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *, 2494 uint8_t *); 2495 /* 2496 * Process context for I/O path into tcm_qla2xxx code 2497 */ 2498 static void qlt_do_work(struct work_struct *work) 2499 { 2500 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 2501 scsi_qla_host_t *vha = cmd->vha; 2502 struct qla_hw_data *ha = vha->hw; 2503 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2504 struct qla_tgt_sess *sess = NULL; 2505 struct atio_from_isp *atio = &cmd->atio; 2506 unsigned char *cdb; 2507 unsigned long flags; 2508 uint32_t data_length; 2509 int ret, fcp_task_attr, data_dir, bidi = 0; 2510 2511 if (tgt->tgt_stop) 2512 goto out_term; 2513 2514 spin_lock_irqsave(&ha->hardware_lock, flags); 2515 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 2516 atio->u.isp24.fcp_hdr.s_id); 2517 /* Do kref_get() before dropping qla_hw_data->hardware_lock. */ 2518 if (sess) 2519 kref_get(&sess->se_sess->sess_kref); 2520 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2521 2522 if (unlikely(!sess)) { 2523 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id; 2524 2525 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022, 2526 "qla_target(%d): Unable to find wwn login" 2527 " (s_id %x:%x:%x), trying to create it manually\n", 2528 vha->vp_idx, s_id[0], s_id[1], s_id[2]); 2529 2530 if (atio->u.raw.entry_count > 1) { 2531 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023, 2532 "Dropping multy entry cmd %p\n", cmd); 2533 goto out_term; 2534 } 2535 2536 mutex_lock(&ha->tgt.tgt_mutex); 2537 sess = qlt_make_local_sess(vha, s_id); 2538 /* sess has an extra creation ref. */ 2539 mutex_unlock(&ha->tgt.tgt_mutex); 2540 2541 if (!sess) 2542 goto out_term; 2543 } 2544 2545 cmd->sess = sess; 2546 cmd->loop_id = sess->loop_id; 2547 cmd->conf_compl_supported = sess->conf_compl_supported; 2548 2549 cdb = &atio->u.isp24.fcp_cmnd.cdb[0]; 2550 cmd->tag = atio->u.isp24.exchange_addr; 2551 cmd->unpacked_lun = scsilun_to_int( 2552 (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun); 2553 2554 if (atio->u.isp24.fcp_cmnd.rddata && 2555 atio->u.isp24.fcp_cmnd.wrdata) { 2556 bidi = 1; 2557 data_dir = DMA_TO_DEVICE; 2558 } else if (atio->u.isp24.fcp_cmnd.rddata) 2559 data_dir = DMA_FROM_DEVICE; 2560 else if (atio->u.isp24.fcp_cmnd.wrdata) 2561 data_dir = DMA_TO_DEVICE; 2562 else 2563 data_dir = DMA_NONE; 2564 2565 fcp_task_attr = qlt_get_fcp_task_attr(vha, 2566 atio->u.isp24.fcp_cmnd.task_attr); 2567 data_length = be32_to_cpu(get_unaligned((uint32_t *) 2568 &atio->u.isp24.fcp_cmnd.add_cdb[ 2569 atio->u.isp24.fcp_cmnd.add_cdb_len])); 2570 2571 ql_dbg(ql_dbg_tgt, vha, 0xe022, 2572 "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n", 2573 cmd, cmd->unpacked_lun, cmd->tag); 2574 2575 ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length, 2576 fcp_task_attr, data_dir, bidi); 2577 if (ret != 0) 2578 goto out_term; 2579 /* 2580 * Drop extra session reference from qla_tgt_handle_cmd_for_atio*( 2581 */ 2582 spin_lock_irqsave(&ha->hardware_lock, flags); 2583 ha->tgt.tgt_ops->put_sess(sess); 2584 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2585 return; 2586 2587 out_term: 2588 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd); 2589 /* 2590 * cmd has not sent to target yet, so pass NULL as the second 2591 * argument to qlt_send_term_exchange() and free the memory here. 2592 */ 2593 spin_lock_irqsave(&ha->hardware_lock, flags); 2594 qlt_send_term_exchange(vha, NULL, &cmd->atio, 1); 2595 kmem_cache_free(qla_tgt_cmd_cachep, cmd); 2596 if (sess) 2597 ha->tgt.tgt_ops->put_sess(sess); 2598 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2599 } 2600 2601 /* ha->hardware_lock supposed to be held on entry */ 2602 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, 2603 struct atio_from_isp *atio) 2604 { 2605 struct qla_hw_data *ha = vha->hw; 2606 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2607 struct qla_tgt_cmd *cmd; 2608 2609 if (unlikely(tgt->tgt_stop)) { 2610 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021, 2611 "New command while device %p is shutting down\n", tgt); 2612 return -EFAULT; 2613 } 2614 2615 cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC); 2616 if (!cmd) { 2617 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e, 2618 "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx); 2619 return -ENOMEM; 2620 } 2621 2622 INIT_LIST_HEAD(&cmd->cmd_list); 2623 2624 memcpy(&cmd->atio, atio, sizeof(*atio)); 2625 cmd->state = QLA_TGT_STATE_NEW; 2626 cmd->tgt = ha->tgt.qla_tgt; 2627 cmd->vha = vha; 2628 2629 INIT_WORK(&cmd->work, qlt_do_work); 2630 queue_work(qla_tgt_wq, &cmd->work); 2631 return 0; 2632 2633 } 2634 2635 /* ha->hardware_lock supposed to be held on entry */ 2636 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun, 2637 int fn, void *iocb, int flags) 2638 { 2639 struct scsi_qla_host *vha = sess->vha; 2640 struct qla_hw_data *ha = vha->hw; 2641 struct qla_tgt_mgmt_cmd *mcmd; 2642 int res; 2643 uint8_t tmr_func; 2644 2645 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 2646 if (!mcmd) { 2647 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009, 2648 "qla_target(%d): Allocation of management " 2649 "command failed, some commands and their data could " 2650 "leak\n", vha->vp_idx); 2651 return -ENOMEM; 2652 } 2653 memset(mcmd, 0, sizeof(*mcmd)); 2654 mcmd->sess = sess; 2655 2656 if (iocb) { 2657 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 2658 sizeof(mcmd->orig_iocb.imm_ntfy)); 2659 } 2660 mcmd->tmr_func = fn; 2661 mcmd->flags = flags; 2662 2663 switch (fn) { 2664 case QLA_TGT_CLEAR_ACA: 2665 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000, 2666 "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx); 2667 tmr_func = TMR_CLEAR_ACA; 2668 break; 2669 2670 case QLA_TGT_TARGET_RESET: 2671 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001, 2672 "qla_target(%d): TARGET_RESET received\n", 2673 sess->vha->vp_idx); 2674 tmr_func = TMR_TARGET_WARM_RESET; 2675 break; 2676 2677 case QLA_TGT_LUN_RESET: 2678 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002, 2679 "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx); 2680 tmr_func = TMR_LUN_RESET; 2681 break; 2682 2683 case QLA_TGT_CLEAR_TS: 2684 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003, 2685 "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx); 2686 tmr_func = TMR_CLEAR_TASK_SET; 2687 break; 2688 2689 case QLA_TGT_ABORT_TS: 2690 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004, 2691 "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx); 2692 tmr_func = TMR_ABORT_TASK_SET; 2693 break; 2694 #if 0 2695 case QLA_TGT_ABORT_ALL: 2696 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005, 2697 "qla_target(%d): Doing ABORT_ALL_TASKS\n", 2698 sess->vha->vp_idx); 2699 tmr_func = 0; 2700 break; 2701 2702 case QLA_TGT_ABORT_ALL_SESS: 2703 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006, 2704 "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n", 2705 sess->vha->vp_idx); 2706 tmr_func = 0; 2707 break; 2708 2709 case QLA_TGT_NEXUS_LOSS_SESS: 2710 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007, 2711 "qla_target(%d): Doing NEXUS_LOSS_SESS\n", 2712 sess->vha->vp_idx); 2713 tmr_func = 0; 2714 break; 2715 2716 case QLA_TGT_NEXUS_LOSS: 2717 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008, 2718 "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx); 2719 tmr_func = 0; 2720 break; 2721 #endif 2722 default: 2723 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a, 2724 "qla_target(%d): Unknown task mgmt fn 0x%x\n", 2725 sess->vha->vp_idx, fn); 2726 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 2727 return -ENOSYS; 2728 } 2729 2730 res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0); 2731 if (res != 0) { 2732 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b, 2733 "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n", 2734 sess->vha->vp_idx, res); 2735 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 2736 return -EFAULT; 2737 } 2738 2739 return 0; 2740 } 2741 2742 /* ha->hardware_lock supposed to be held on entry */ 2743 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb) 2744 { 2745 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 2746 struct qla_hw_data *ha = vha->hw; 2747 struct qla_tgt *tgt; 2748 struct qla_tgt_sess *sess; 2749 uint32_t lun, unpacked_lun; 2750 int lun_size, fn; 2751 2752 tgt = ha->tgt.qla_tgt; 2753 2754 lun = a->u.isp24.fcp_cmnd.lun; 2755 lun_size = sizeof(a->u.isp24.fcp_cmnd.lun); 2756 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 2757 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 2758 a->u.isp24.fcp_hdr.s_id); 2759 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 2760 2761 if (!sess) { 2762 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024, 2763 "qla_target(%d): task mgmt fn 0x%x for " 2764 "non-existant session\n", vha->vp_idx, fn); 2765 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb, 2766 sizeof(struct atio_from_isp)); 2767 } 2768 2769 return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 2770 } 2771 2772 /* ha->hardware_lock supposed to be held on entry */ 2773 static int __qlt_abort_task(struct scsi_qla_host *vha, 2774 struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess) 2775 { 2776 struct atio_from_isp *a = (struct atio_from_isp *)iocb; 2777 struct qla_hw_data *ha = vha->hw; 2778 struct qla_tgt_mgmt_cmd *mcmd; 2779 uint32_t lun, unpacked_lun; 2780 int rc; 2781 2782 mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC); 2783 if (mcmd == NULL) { 2784 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f, 2785 "qla_target(%d): %s: Allocation of ABORT cmd failed\n", 2786 vha->vp_idx, __func__); 2787 return -ENOMEM; 2788 } 2789 memset(mcmd, 0, sizeof(*mcmd)); 2790 2791 mcmd->sess = sess; 2792 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb, 2793 sizeof(mcmd->orig_iocb.imm_ntfy)); 2794 2795 lun = a->u.isp24.fcp_cmnd.lun; 2796 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 2797 2798 rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK, 2799 le16_to_cpu(iocb->u.isp2x.seq_id)); 2800 if (rc != 0) { 2801 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060, 2802 "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n", 2803 vha->vp_idx, rc); 2804 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool); 2805 return -EFAULT; 2806 } 2807 2808 return 0; 2809 } 2810 2811 /* ha->hardware_lock supposed to be held on entry */ 2812 static int qlt_abort_task(struct scsi_qla_host *vha, 2813 struct imm_ntfy_from_isp *iocb) 2814 { 2815 struct qla_hw_data *ha = vha->hw; 2816 struct qla_tgt_sess *sess; 2817 int loop_id; 2818 2819 loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb); 2820 2821 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id); 2822 if (sess == NULL) { 2823 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025, 2824 "qla_target(%d): task abort for unexisting " 2825 "session\n", vha->vp_idx); 2826 return qlt_sched_sess_work(ha->tgt.qla_tgt, 2827 QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb)); 2828 } 2829 2830 return __qlt_abort_task(vha, iocb, sess); 2831 } 2832 2833 /* 2834 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 2835 */ 2836 static int qlt_24xx_handle_els(struct scsi_qla_host *vha, 2837 struct imm_ntfy_from_isp *iocb) 2838 { 2839 struct qla_hw_data *ha = vha->hw; 2840 int res = 0; 2841 2842 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026, 2843 "qla_target(%d): Port ID: 0x%02x:%02x:%02x" 2844 " ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0], 2845 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2], 2846 iocb->u.isp24.status_subcode); 2847 2848 switch (iocb->u.isp24.status_subcode) { 2849 case ELS_PLOGI: 2850 case ELS_FLOGI: 2851 case ELS_PRLI: 2852 case ELS_LOGO: 2853 case ELS_PRLO: 2854 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 2855 break; 2856 case ELS_PDISC: 2857 case ELS_ADISC: 2858 { 2859 struct qla_tgt *tgt = ha->tgt.qla_tgt; 2860 if (tgt->link_reinit_iocb_pending) { 2861 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 2862 0, 0, 0, 0, 0, 0); 2863 tgt->link_reinit_iocb_pending = 0; 2864 } 2865 res = 1; /* send notify ack */ 2866 break; 2867 } 2868 2869 default: 2870 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061, 2871 "qla_target(%d): Unsupported ELS command %x " 2872 "received\n", vha->vp_idx, iocb->u.isp24.status_subcode); 2873 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS); 2874 break; 2875 } 2876 2877 return res; 2878 } 2879 2880 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset) 2881 { 2882 struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL; 2883 size_t first_offset = 0, rem_offset = offset, tmp = 0; 2884 int i, sg_srr_cnt, bufflen = 0; 2885 2886 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023, 2887 "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, " 2888 "cmd->sg_cnt: %u, direction: %d\n", 2889 cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction); 2890 2891 /* 2892 * FIXME: Reject non zero SRR relative offset until we can test 2893 * this code properly. 2894 */ 2895 pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset); 2896 return -1; 2897 2898 if (!cmd->sg || !cmd->sg_cnt) { 2899 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055, 2900 "Missing cmd->sg or zero cmd->sg_cnt in" 2901 " qla_tgt_set_data_offset\n"); 2902 return -EINVAL; 2903 } 2904 /* 2905 * Walk the current cmd->sg list until we locate the new sg_srr_start 2906 */ 2907 for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) { 2908 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024, 2909 "sg[%d]: %p page: %p, length: %d, offset: %d\n", 2910 i, sg, sg_page(sg), sg->length, sg->offset); 2911 2912 if ((sg->length + tmp) > offset) { 2913 first_offset = rem_offset; 2914 sg_srr_start = sg; 2915 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025, 2916 "Found matching sg[%d], using %p as sg_srr_start, " 2917 "and using first_offset: %zu\n", i, sg, 2918 first_offset); 2919 break; 2920 } 2921 tmp += sg->length; 2922 rem_offset -= sg->length; 2923 } 2924 2925 if (!sg_srr_start) { 2926 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056, 2927 "Unable to locate sg_srr_start for offset: %u\n", offset); 2928 return -EINVAL; 2929 } 2930 sg_srr_cnt = (cmd->sg_cnt - i); 2931 2932 sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL); 2933 if (!sg_srr) { 2934 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057, 2935 "Unable to allocate sgp\n"); 2936 return -ENOMEM; 2937 } 2938 sg_init_table(sg_srr, sg_srr_cnt); 2939 sgp = &sg_srr[0]; 2940 /* 2941 * Walk the remaining list for sg_srr_start, mapping to the newly 2942 * allocated sg_srr taking first_offset into account. 2943 */ 2944 for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) { 2945 if (first_offset) { 2946 sg_set_page(sgp, sg_page(sg), 2947 (sg->length - first_offset), first_offset); 2948 first_offset = 0; 2949 } else { 2950 sg_set_page(sgp, sg_page(sg), sg->length, 0); 2951 } 2952 bufflen += sgp->length; 2953 2954 sgp = sg_next(sgp); 2955 if (!sgp) 2956 break; 2957 } 2958 2959 cmd->sg = sg_srr; 2960 cmd->sg_cnt = sg_srr_cnt; 2961 cmd->bufflen = bufflen; 2962 cmd->offset += offset; 2963 cmd->free_sg = 1; 2964 2965 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg); 2966 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n", 2967 cmd->sg_cnt); 2968 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n", 2969 cmd->bufflen); 2970 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n", 2971 cmd->offset); 2972 2973 if (cmd->sg_cnt < 0) 2974 BUG(); 2975 2976 if (cmd->bufflen < 0) 2977 BUG(); 2978 2979 return 0; 2980 } 2981 2982 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd, 2983 uint32_t srr_rel_offs, int *xmit_type) 2984 { 2985 int res = 0, rel_offs; 2986 2987 rel_offs = srr_rel_offs - cmd->offset; 2988 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d", 2989 srr_rel_offs, rel_offs); 2990 2991 *xmit_type = QLA_TGT_XMIT_ALL; 2992 2993 if (rel_offs < 0) { 2994 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062, 2995 "qla_target(%d): SRR rel_offs (%d) < 0", 2996 cmd->vha->vp_idx, rel_offs); 2997 res = -1; 2998 } else if (rel_offs == cmd->bufflen) 2999 *xmit_type = QLA_TGT_XMIT_STATUS; 3000 else if (rel_offs > 0) 3001 res = qlt_set_data_offset(cmd, rel_offs); 3002 3003 return res; 3004 } 3005 3006 /* No locks, thread context */ 3007 static void qlt_handle_srr(struct scsi_qla_host *vha, 3008 struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm) 3009 { 3010 struct imm_ntfy_from_isp *ntfy = 3011 (struct imm_ntfy_from_isp *)&imm->imm_ntfy; 3012 struct qla_hw_data *ha = vha->hw; 3013 struct qla_tgt_cmd *cmd = sctio->cmd; 3014 struct se_cmd *se_cmd = &cmd->se_cmd; 3015 unsigned long flags; 3016 int xmit_type = 0, resp = 0; 3017 uint32_t offset; 3018 uint16_t srr_ui; 3019 3020 offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs); 3021 srr_ui = ntfy->u.isp24.srr_ui; 3022 3023 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n", 3024 cmd, srr_ui); 3025 3026 switch (srr_ui) { 3027 case SRR_IU_STATUS: 3028 spin_lock_irqsave(&ha->hardware_lock, flags); 3029 qlt_send_notify_ack(vha, ntfy, 3030 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3031 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3032 xmit_type = QLA_TGT_XMIT_STATUS; 3033 resp = 1; 3034 break; 3035 case SRR_IU_DATA_IN: 3036 if (!cmd->sg || !cmd->sg_cnt) { 3037 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063, 3038 "Unable to process SRR_IU_DATA_IN due to" 3039 " missing cmd->sg, state: %d\n", cmd->state); 3040 dump_stack(); 3041 goto out_reject; 3042 } 3043 if (se_cmd->scsi_status != 0) { 3044 ql_dbg(ql_dbg_tgt, vha, 0xe02a, 3045 "Rejecting SRR_IU_DATA_IN with non GOOD " 3046 "scsi_status\n"); 3047 goto out_reject; 3048 } 3049 cmd->bufflen = se_cmd->data_length; 3050 3051 if (qlt_has_data(cmd)) { 3052 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3053 goto out_reject; 3054 spin_lock_irqsave(&ha->hardware_lock, flags); 3055 qlt_send_notify_ack(vha, ntfy, 3056 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3057 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3058 resp = 1; 3059 } else { 3060 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064, 3061 "qla_target(%d): SRR for in data for cmd " 3062 "without them (tag %d, SCSI status %d), " 3063 "reject", vha->vp_idx, cmd->tag, 3064 cmd->se_cmd.scsi_status); 3065 goto out_reject; 3066 } 3067 break; 3068 case SRR_IU_DATA_OUT: 3069 if (!cmd->sg || !cmd->sg_cnt) { 3070 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065, 3071 "Unable to process SRR_IU_DATA_OUT due to" 3072 " missing cmd->sg\n"); 3073 dump_stack(); 3074 goto out_reject; 3075 } 3076 if (se_cmd->scsi_status != 0) { 3077 ql_dbg(ql_dbg_tgt, vha, 0xe02b, 3078 "Rejecting SRR_IU_DATA_OUT" 3079 " with non GOOD scsi_status\n"); 3080 goto out_reject; 3081 } 3082 cmd->bufflen = se_cmd->data_length; 3083 3084 if (qlt_has_data(cmd)) { 3085 if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0) 3086 goto out_reject; 3087 spin_lock_irqsave(&ha->hardware_lock, flags); 3088 qlt_send_notify_ack(vha, ntfy, 3089 0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0); 3090 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3091 if (xmit_type & QLA_TGT_XMIT_DATA) 3092 qlt_rdy_to_xfer(cmd); 3093 } else { 3094 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066, 3095 "qla_target(%d): SRR for out data for cmd " 3096 "without them (tag %d, SCSI status %d), " 3097 "reject", vha->vp_idx, cmd->tag, 3098 cmd->se_cmd.scsi_status); 3099 goto out_reject; 3100 } 3101 break; 3102 default: 3103 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067, 3104 "qla_target(%d): Unknown srr_ui value %x", 3105 vha->vp_idx, srr_ui); 3106 goto out_reject; 3107 } 3108 3109 /* Transmit response in case of status and data-in cases */ 3110 if (resp) 3111 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 3112 3113 return; 3114 3115 out_reject: 3116 spin_lock_irqsave(&ha->hardware_lock, flags); 3117 qlt_send_notify_ack(vha, ntfy, 0, 0, 0, 3118 NOTIFY_ACK_SRR_FLAGS_REJECT, 3119 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3120 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3121 if (cmd->state == QLA_TGT_STATE_NEED_DATA) { 3122 cmd->state = QLA_TGT_STATE_DATA_IN; 3123 dump_stack(); 3124 } else 3125 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1); 3126 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3127 } 3128 3129 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha, 3130 struct qla_tgt_srr_imm *imm, int ha_locked) 3131 { 3132 struct qla_hw_data *ha = vha->hw; 3133 unsigned long flags = 0; 3134 3135 if (!ha_locked) 3136 spin_lock_irqsave(&ha->hardware_lock, flags); 3137 3138 qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0, 3139 NOTIFY_ACK_SRR_FLAGS_REJECT, 3140 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3141 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3142 3143 if (!ha_locked) 3144 spin_unlock_irqrestore(&ha->hardware_lock, flags); 3145 3146 kfree(imm); 3147 } 3148 3149 static void qlt_handle_srr_work(struct work_struct *work) 3150 { 3151 struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work); 3152 struct scsi_qla_host *vha = tgt->vha; 3153 struct qla_tgt_srr_ctio *sctio; 3154 unsigned long flags; 3155 3156 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n", 3157 tgt); 3158 3159 restart: 3160 spin_lock_irqsave(&tgt->srr_lock, flags); 3161 list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) { 3162 struct qla_tgt_srr_imm *imm, *i, *ti; 3163 struct qla_tgt_cmd *cmd; 3164 struct se_cmd *se_cmd; 3165 3166 imm = NULL; 3167 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list, 3168 srr_list_entry) { 3169 if (i->srr_id == sctio->srr_id) { 3170 list_del(&i->srr_list_entry); 3171 if (imm) { 3172 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068, 3173 "qla_target(%d): There must be " 3174 "only one IMM SRR per CTIO SRR " 3175 "(IMM SRR %p, id %d, CTIO %p\n", 3176 vha->vp_idx, i, i->srr_id, sctio); 3177 qlt_reject_free_srr_imm(tgt->vha, i, 0); 3178 } else 3179 imm = i; 3180 } 3181 } 3182 3183 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a, 3184 "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio, 3185 sctio->srr_id); 3186 3187 if (imm == NULL) { 3188 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b, 3189 "Not found matching IMM for SRR CTIO (id %d)\n", 3190 sctio->srr_id); 3191 continue; 3192 } else 3193 list_del(&sctio->srr_list_entry); 3194 3195 spin_unlock_irqrestore(&tgt->srr_lock, flags); 3196 3197 cmd = sctio->cmd; 3198 /* 3199 * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow 3200 * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in() 3201 * logic.. 3202 */ 3203 cmd->offset = 0; 3204 if (cmd->free_sg) { 3205 kfree(cmd->sg); 3206 cmd->sg = NULL; 3207 cmd->free_sg = 0; 3208 } 3209 se_cmd = &cmd->se_cmd; 3210 3211 cmd->sg_cnt = se_cmd->t_data_nents; 3212 cmd->sg = se_cmd->t_data_sg; 3213 3214 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c, 3215 "SRR cmd %p (se_cmd %p, tag %d, op %x), " 3216 "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag, 3217 se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset); 3218 3219 qlt_handle_srr(vha, sctio, imm); 3220 3221 kfree(imm); 3222 kfree(sctio); 3223 goto restart; 3224 } 3225 spin_unlock_irqrestore(&tgt->srr_lock, flags); 3226 } 3227 3228 /* ha->hardware_lock supposed to be held on entry */ 3229 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha, 3230 struct imm_ntfy_from_isp *iocb) 3231 { 3232 struct qla_tgt_srr_imm *imm; 3233 struct qla_hw_data *ha = vha->hw; 3234 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3235 struct qla_tgt_srr_ctio *sctio; 3236 3237 tgt->imm_srr_id++; 3238 3239 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n", 3240 vha->vp_idx); 3241 3242 imm = kzalloc(sizeof(*imm), GFP_ATOMIC); 3243 if (imm != NULL) { 3244 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy)); 3245 3246 /* IRQ is already OFF */ 3247 spin_lock(&tgt->srr_lock); 3248 imm->srr_id = tgt->imm_srr_id; 3249 list_add_tail(&imm->srr_list_entry, 3250 &tgt->srr_imm_list); 3251 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e, 3252 "IMM NTFY SRR %p added (id %d, ui %x)\n", 3253 imm, imm->srr_id, iocb->u.isp24.srr_ui); 3254 if (tgt->imm_srr_id == tgt->ctio_srr_id) { 3255 int found = 0; 3256 list_for_each_entry(sctio, &tgt->srr_ctio_list, 3257 srr_list_entry) { 3258 if (sctio->srr_id == imm->srr_id) { 3259 found = 1; 3260 break; 3261 } 3262 } 3263 if (found) { 3264 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s", 3265 "Scheduling srr work\n"); 3266 schedule_work(&tgt->srr_work); 3267 } else { 3268 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030, 3269 "qla_target(%d): imm_srr_id " 3270 "== ctio_srr_id (%d), but there is no " 3271 "corresponding SRR CTIO, deleting IMM " 3272 "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id, 3273 imm); 3274 list_del(&imm->srr_list_entry); 3275 3276 kfree(imm); 3277 3278 spin_unlock(&tgt->srr_lock); 3279 goto out_reject; 3280 } 3281 } 3282 spin_unlock(&tgt->srr_lock); 3283 } else { 3284 struct qla_tgt_srr_ctio *ts; 3285 3286 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069, 3287 "qla_target(%d): Unable to allocate SRR IMM " 3288 "entry, SRR request will be rejected\n", vha->vp_idx); 3289 3290 /* IRQ is already OFF */ 3291 spin_lock(&tgt->srr_lock); 3292 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list, 3293 srr_list_entry) { 3294 if (sctio->srr_id == tgt->imm_srr_id) { 3295 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031, 3296 "CTIO SRR %p deleted (id %d)\n", 3297 sctio, sctio->srr_id); 3298 list_del(&sctio->srr_list_entry); 3299 qlt_send_term_exchange(vha, sctio->cmd, 3300 &sctio->cmd->atio, 1); 3301 kfree(sctio); 3302 } 3303 } 3304 spin_unlock(&tgt->srr_lock); 3305 goto out_reject; 3306 } 3307 3308 return; 3309 3310 out_reject: 3311 qlt_send_notify_ack(vha, iocb, 0, 0, 0, 3312 NOTIFY_ACK_SRR_FLAGS_REJECT, 3313 NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM, 3314 NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL); 3315 } 3316 3317 /* 3318 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3319 */ 3320 static void qlt_handle_imm_notify(struct scsi_qla_host *vha, 3321 struct imm_ntfy_from_isp *iocb) 3322 { 3323 struct qla_hw_data *ha = vha->hw; 3324 uint32_t add_flags = 0; 3325 int send_notify_ack = 1; 3326 uint16_t status; 3327 3328 status = le16_to_cpu(iocb->u.isp2x.status); 3329 switch (status) { 3330 case IMM_NTFY_LIP_RESET: 3331 { 3332 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032, 3333 "qla_target(%d): LIP reset (loop %#x), subcode %x\n", 3334 vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle), 3335 iocb->u.isp24.status_subcode); 3336 3337 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 3338 send_notify_ack = 0; 3339 break; 3340 } 3341 3342 case IMM_NTFY_LIP_LINK_REINIT: 3343 { 3344 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3345 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033, 3346 "qla_target(%d): LINK REINIT (loop %#x, " 3347 "subcode %x)\n", vha->vp_idx, 3348 le16_to_cpu(iocb->u.isp24.nport_handle), 3349 iocb->u.isp24.status_subcode); 3350 if (tgt->link_reinit_iocb_pending) { 3351 qlt_send_notify_ack(vha, &tgt->link_reinit_iocb, 3352 0, 0, 0, 0, 0, 0); 3353 } 3354 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb)); 3355 tgt->link_reinit_iocb_pending = 1; 3356 /* 3357 * QLogic requires to wait after LINK REINIT for possible 3358 * PDISC or ADISC ELS commands 3359 */ 3360 send_notify_ack = 0; 3361 break; 3362 } 3363 3364 case IMM_NTFY_PORT_LOGOUT: 3365 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034, 3366 "qla_target(%d): Port logout (loop " 3367 "%#x, subcode %x)\n", vha->vp_idx, 3368 le16_to_cpu(iocb->u.isp24.nport_handle), 3369 iocb->u.isp24.status_subcode); 3370 3371 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0) 3372 send_notify_ack = 0; 3373 /* The sessions will be cleared in the callback, if needed */ 3374 break; 3375 3376 case IMM_NTFY_GLBL_TPRLO: 3377 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035, 3378 "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status); 3379 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 3380 send_notify_ack = 0; 3381 /* The sessions will be cleared in the callback, if needed */ 3382 break; 3383 3384 case IMM_NTFY_PORT_CONFIG: 3385 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036, 3386 "qla_target(%d): Port config changed (%x)\n", vha->vp_idx, 3387 status); 3388 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0) 3389 send_notify_ack = 0; 3390 /* The sessions will be cleared in the callback, if needed */ 3391 break; 3392 3393 case IMM_NTFY_GLBL_LOGO: 3394 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a, 3395 "qla_target(%d): Link failure detected\n", 3396 vha->vp_idx); 3397 /* I_T nexus loss */ 3398 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0) 3399 send_notify_ack = 0; 3400 break; 3401 3402 case IMM_NTFY_IOCB_OVERFLOW: 3403 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b, 3404 "qla_target(%d): Cannot provide requested " 3405 "capability (IOCB overflowed the immediate notify " 3406 "resource count)\n", vha->vp_idx); 3407 break; 3408 3409 case IMM_NTFY_ABORT_TASK: 3410 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037, 3411 "qla_target(%d): Abort Task (S %08x I %#x -> " 3412 "L %#x)\n", vha->vp_idx, 3413 le16_to_cpu(iocb->u.isp2x.seq_id), 3414 GET_TARGET_ID(ha, (struct atio_from_isp *)iocb), 3415 le16_to_cpu(iocb->u.isp2x.lun)); 3416 if (qlt_abort_task(vha, iocb) == 0) 3417 send_notify_ack = 0; 3418 break; 3419 3420 case IMM_NTFY_RESOURCE: 3421 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c, 3422 "qla_target(%d): Out of resources, host %ld\n", 3423 vha->vp_idx, vha->host_no); 3424 break; 3425 3426 case IMM_NTFY_MSG_RX: 3427 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038, 3428 "qla_target(%d): Immediate notify task %x\n", 3429 vha->vp_idx, iocb->u.isp2x.task_flags); 3430 if (qlt_handle_task_mgmt(vha, iocb) == 0) 3431 send_notify_ack = 0; 3432 break; 3433 3434 case IMM_NTFY_ELS: 3435 if (qlt_24xx_handle_els(vha, iocb) == 0) 3436 send_notify_ack = 0; 3437 break; 3438 3439 case IMM_NTFY_SRR: 3440 qlt_prepare_srr_imm(vha, iocb); 3441 send_notify_ack = 0; 3442 break; 3443 3444 default: 3445 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d, 3446 "qla_target(%d): Received unknown immediate " 3447 "notify status %x\n", vha->vp_idx, status); 3448 break; 3449 } 3450 3451 if (send_notify_ack) 3452 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0); 3453 } 3454 3455 /* 3456 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3457 * This function sends busy to ISP 2xxx or 24xx. 3458 */ 3459 static void qlt_send_busy(struct scsi_qla_host *vha, 3460 struct atio_from_isp *atio, uint16_t status) 3461 { 3462 struct ctio7_to_24xx *ctio24; 3463 struct qla_hw_data *ha = vha->hw; 3464 request_t *pkt; 3465 struct qla_tgt_sess *sess = NULL; 3466 3467 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 3468 atio->u.isp24.fcp_hdr.s_id); 3469 if (!sess) { 3470 qlt_send_term_exchange(vha, NULL, atio, 1); 3471 return; 3472 } 3473 /* Sending marker isn't necessary, since we called from ISR */ 3474 3475 pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL); 3476 if (!pkt) { 3477 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e, 3478 "qla_target(%d): %s failed: unable to allocate " 3479 "request packet", vha->vp_idx, __func__); 3480 return; 3481 } 3482 3483 pkt->entry_count = 1; 3484 pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK; 3485 3486 ctio24 = (struct ctio7_to_24xx *)pkt; 3487 ctio24->entry_type = CTIO_TYPE7; 3488 ctio24->nport_handle = sess->loop_id; 3489 ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT); 3490 ctio24->vp_index = vha->vp_idx; 3491 ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2]; 3492 ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1]; 3493 ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0]; 3494 ctio24->exchange_addr = atio->u.isp24.exchange_addr; 3495 ctio24->u.status1.flags = (atio->u.isp24.attr << 9) | 3496 __constant_cpu_to_le16( 3497 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS | 3498 CTIO7_FLAGS_DONT_RET_CTIO); 3499 /* 3500 * CTIO from fw w/o se_cmd doesn't provide enough info to retry it, 3501 * if the explicit conformation is used. 3502 */ 3503 ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id); 3504 ctio24->u.status1.scsi_status = cpu_to_le16(status); 3505 ctio24->u.status1.residual = get_unaligned((uint32_t *) 3506 &atio->u.isp24.fcp_cmnd.add_cdb[ 3507 atio->u.isp24.fcp_cmnd.add_cdb_len]); 3508 if (ctio24->u.status1.residual != 0) 3509 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER; 3510 3511 qla2x00_start_iocbs(vha, vha->req); 3512 } 3513 3514 /* ha->hardware_lock supposed to be held on entry */ 3515 /* called via callback from qla2xxx */ 3516 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha, 3517 struct atio_from_isp *atio) 3518 { 3519 struct qla_hw_data *ha = vha->hw; 3520 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3521 int rc; 3522 3523 if (unlikely(tgt == NULL)) { 3524 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039, 3525 "ATIO pkt, but no tgt (ha %p)", ha); 3526 return; 3527 } 3528 ql_dbg(ql_dbg_tgt, vha, 0xe02c, 3529 "qla_target(%d): ATIO pkt %p: type %02x count %02x", 3530 vha->vp_idx, atio, atio->u.raw.entry_type, 3531 atio->u.raw.entry_count); 3532 /* 3533 * In tgt_stop mode we also should allow all requests to pass. 3534 * Otherwise, some commands can stuck. 3535 */ 3536 3537 tgt->irq_cmd_count++; 3538 3539 switch (atio->u.raw.entry_type) { 3540 case ATIO_TYPE7: 3541 ql_dbg(ql_dbg_tgt, vha, 0xe02d, 3542 "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, " 3543 "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n", 3544 vha->vp_idx, atio->u.isp24.fcp_cmnd.lun, 3545 atio->u.isp24.fcp_cmnd.rddata, 3546 atio->u.isp24.fcp_cmnd.wrdata, 3547 atio->u.isp24.fcp_cmnd.add_cdb_len, 3548 be32_to_cpu(get_unaligned((uint32_t *) 3549 &atio->u.isp24.fcp_cmnd.add_cdb[ 3550 atio->u.isp24.fcp_cmnd.add_cdb_len])), 3551 atio->u.isp24.fcp_hdr.s_id[0], 3552 atio->u.isp24.fcp_hdr.s_id[1], 3553 atio->u.isp24.fcp_hdr.s_id[2]); 3554 3555 if (unlikely(atio->u.isp24.exchange_addr == 3556 ATIO_EXCHANGE_ADDRESS_UNKNOWN)) { 3557 ql_dbg(ql_dbg_tgt, vha, 0xe058, 3558 "qla_target(%d): ATIO_TYPE7 " 3559 "received with UNKNOWN exchange address, " 3560 "sending QUEUE_FULL\n", vha->vp_idx); 3561 qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL); 3562 break; 3563 } 3564 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) 3565 rc = qlt_handle_cmd_for_atio(vha, atio); 3566 else 3567 rc = qlt_handle_task_mgmt(vha, atio); 3568 if (unlikely(rc != 0)) { 3569 if (rc == -ESRCH) { 3570 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 3571 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 3572 #else 3573 qlt_send_term_exchange(vha, NULL, atio, 1); 3574 #endif 3575 } else { 3576 if (tgt->tgt_stop) { 3577 ql_dbg(ql_dbg_tgt, vha, 0xe059, 3578 "qla_target: Unable to send " 3579 "command to target for req, " 3580 "ignoring.\n"); 3581 } else { 3582 ql_dbg(ql_dbg_tgt, vha, 0xe05a, 3583 "qla_target(%d): Unable to send " 3584 "command to target, sending BUSY " 3585 "status.\n", vha->vp_idx); 3586 qlt_send_busy(vha, atio, SAM_STAT_BUSY); 3587 } 3588 } 3589 } 3590 break; 3591 3592 case IMMED_NOTIFY_TYPE: 3593 { 3594 if (unlikely(atio->u.isp2x.entry_status != 0)) { 3595 ql_dbg(ql_dbg_tgt, vha, 0xe05b, 3596 "qla_target(%d): Received ATIO packet %x " 3597 "with error status %x\n", vha->vp_idx, 3598 atio->u.raw.entry_type, 3599 atio->u.isp2x.entry_status); 3600 break; 3601 } 3602 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO"); 3603 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio); 3604 break; 3605 } 3606 3607 default: 3608 ql_dbg(ql_dbg_tgt, vha, 0xe05c, 3609 "qla_target(%d): Received unknown ATIO atio " 3610 "type %x\n", vha->vp_idx, atio->u.raw.entry_type); 3611 break; 3612 } 3613 3614 tgt->irq_cmd_count--; 3615 } 3616 3617 /* ha->hardware_lock supposed to be held on entry */ 3618 /* called via callback from qla2xxx */ 3619 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt) 3620 { 3621 struct qla_hw_data *ha = vha->hw; 3622 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3623 3624 if (unlikely(tgt == NULL)) { 3625 ql_dbg(ql_dbg_tgt, vha, 0xe05d, 3626 "qla_target(%d): Response pkt %x received, but no " 3627 "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha); 3628 return; 3629 } 3630 3631 ql_dbg(ql_dbg_tgt, vha, 0xe02f, 3632 "qla_target(%d): response pkt %p: T %02x C %02x S %02x " 3633 "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type, 3634 pkt->entry_count, pkt->entry_status, pkt->handle); 3635 3636 /* 3637 * In tgt_stop mode we also should allow all requests to pass. 3638 * Otherwise, some commands can stuck. 3639 */ 3640 3641 tgt->irq_cmd_count++; 3642 3643 switch (pkt->entry_type) { 3644 case CTIO_TYPE7: 3645 { 3646 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt; 3647 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n", 3648 vha->vp_idx); 3649 qlt_do_ctio_completion(vha, entry->handle, 3650 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 3651 entry); 3652 break; 3653 } 3654 3655 case ACCEPT_TGT_IO_TYPE: 3656 { 3657 struct atio_from_isp *atio = (struct atio_from_isp *)pkt; 3658 int rc; 3659 ql_dbg(ql_dbg_tgt, vha, 0xe031, 3660 "ACCEPT_TGT_IO instance %d status %04x " 3661 "lun %04x read/write %d data_length %04x " 3662 "target_id %02x rx_id %04x\n ", vha->vp_idx, 3663 le16_to_cpu(atio->u.isp2x.status), 3664 le16_to_cpu(atio->u.isp2x.lun), 3665 atio->u.isp2x.execution_codes, 3666 le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha, 3667 atio), atio->u.isp2x.rx_id); 3668 if (atio->u.isp2x.status != 3669 __constant_cpu_to_le16(ATIO_CDB_VALID)) { 3670 ql_dbg(ql_dbg_tgt, vha, 0xe05e, 3671 "qla_target(%d): ATIO with error " 3672 "status %x received\n", vha->vp_idx, 3673 le16_to_cpu(atio->u.isp2x.status)); 3674 break; 3675 } 3676 ql_dbg(ql_dbg_tgt, vha, 0xe032, 3677 "FCP CDB: 0x%02x, sizeof(cdb): %lu", 3678 atio->u.isp2x.cdb[0], (unsigned long 3679 int)sizeof(atio->u.isp2x.cdb)); 3680 3681 rc = qlt_handle_cmd_for_atio(vha, atio); 3682 if (unlikely(rc != 0)) { 3683 if (rc == -ESRCH) { 3684 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */ 3685 qlt_send_busy(vha, atio, 0); 3686 #else 3687 qlt_send_term_exchange(vha, NULL, atio, 1); 3688 #endif 3689 } else { 3690 if (tgt->tgt_stop) { 3691 ql_dbg(ql_dbg_tgt, vha, 0xe05f, 3692 "qla_target: Unable to send " 3693 "command to target, sending TERM " 3694 "EXCHANGE for rsp\n"); 3695 qlt_send_term_exchange(vha, NULL, 3696 atio, 1); 3697 } else { 3698 ql_dbg(ql_dbg_tgt, vha, 0xe060, 3699 "qla_target(%d): Unable to send " 3700 "command to target, sending BUSY " 3701 "status\n", vha->vp_idx); 3702 qlt_send_busy(vha, atio, 0); 3703 } 3704 } 3705 } 3706 } 3707 break; 3708 3709 case CONTINUE_TGT_IO_TYPE: 3710 { 3711 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 3712 ql_dbg(ql_dbg_tgt, vha, 0xe033, 3713 "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx); 3714 qlt_do_ctio_completion(vha, entry->handle, 3715 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 3716 entry); 3717 break; 3718 } 3719 3720 case CTIO_A64_TYPE: 3721 { 3722 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt; 3723 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n", 3724 vha->vp_idx); 3725 qlt_do_ctio_completion(vha, entry->handle, 3726 le16_to_cpu(entry->status)|(pkt->entry_status << 16), 3727 entry); 3728 break; 3729 } 3730 3731 case IMMED_NOTIFY_TYPE: 3732 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n"); 3733 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt); 3734 break; 3735 3736 case NOTIFY_ACK_TYPE: 3737 if (tgt->notify_ack_expected > 0) { 3738 struct nack_to_isp *entry = (struct nack_to_isp *)pkt; 3739 ql_dbg(ql_dbg_tgt, vha, 0xe036, 3740 "NOTIFY_ACK seq %08x status %x\n", 3741 le16_to_cpu(entry->u.isp2x.seq_id), 3742 le16_to_cpu(entry->u.isp2x.status)); 3743 tgt->notify_ack_expected--; 3744 if (entry->u.isp2x.status != 3745 __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) { 3746 ql_dbg(ql_dbg_tgt, vha, 0xe061, 3747 "qla_target(%d): NOTIFY_ACK " 3748 "failed %x\n", vha->vp_idx, 3749 le16_to_cpu(entry->u.isp2x.status)); 3750 } 3751 } else { 3752 ql_dbg(ql_dbg_tgt, vha, 0xe062, 3753 "qla_target(%d): Unexpected NOTIFY_ACK received\n", 3754 vha->vp_idx); 3755 } 3756 break; 3757 3758 case ABTS_RECV_24XX: 3759 ql_dbg(ql_dbg_tgt, vha, 0xe037, 3760 "ABTS_RECV_24XX: instance %d\n", vha->vp_idx); 3761 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt); 3762 break; 3763 3764 case ABTS_RESP_24XX: 3765 if (tgt->abts_resp_expected > 0) { 3766 struct abts_resp_from_24xx_fw *entry = 3767 (struct abts_resp_from_24xx_fw *)pkt; 3768 ql_dbg(ql_dbg_tgt, vha, 0xe038, 3769 "ABTS_RESP_24XX: compl_status %x\n", 3770 entry->compl_status); 3771 tgt->abts_resp_expected--; 3772 if (le16_to_cpu(entry->compl_status) != 3773 ABTS_RESP_COMPL_SUCCESS) { 3774 if ((entry->error_subcode1 == 0x1E) && 3775 (entry->error_subcode2 == 0)) { 3776 /* 3777 * We've got a race here: aborted 3778 * exchange not terminated, i.e. 3779 * response for the aborted command was 3780 * sent between the abort request was 3781 * received and processed. 3782 * Unfortunately, the firmware has a 3783 * silly requirement that all aborted 3784 * exchanges must be explicitely 3785 * terminated, otherwise it refuses to 3786 * send responses for the abort 3787 * requests. So, we have to 3788 * (re)terminate the exchange and retry 3789 * the abort response. 3790 */ 3791 qlt_24xx_retry_term_exchange(vha, 3792 entry); 3793 } else 3794 ql_dbg(ql_dbg_tgt, vha, 0xe063, 3795 "qla_target(%d): ABTS_RESP_24XX " 3796 "failed %x (subcode %x:%x)", 3797 vha->vp_idx, entry->compl_status, 3798 entry->error_subcode1, 3799 entry->error_subcode2); 3800 } 3801 } else { 3802 ql_dbg(ql_dbg_tgt, vha, 0xe064, 3803 "qla_target(%d): Unexpected ABTS_RESP_24XX " 3804 "received\n", vha->vp_idx); 3805 } 3806 break; 3807 3808 default: 3809 ql_dbg(ql_dbg_tgt, vha, 0xe065, 3810 "qla_target(%d): Received unknown response pkt " 3811 "type %x\n", vha->vp_idx, pkt->entry_type); 3812 break; 3813 } 3814 3815 tgt->irq_cmd_count--; 3816 } 3817 3818 /* 3819 * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire 3820 */ 3821 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha, 3822 uint16_t *mailbox) 3823 { 3824 struct qla_hw_data *ha = vha->hw; 3825 struct qla_tgt *tgt = ha->tgt.qla_tgt; 3826 int login_code; 3827 3828 ql_dbg(ql_dbg_tgt, vha, 0xe039, 3829 "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n", 3830 vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done, 3831 ha->operating_mode, ha->current_topology); 3832 3833 if (!ha->tgt.tgt_ops) 3834 return; 3835 3836 if (unlikely(tgt == NULL)) { 3837 ql_dbg(ql_dbg_tgt, vha, 0xe03a, 3838 "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha); 3839 return; 3840 } 3841 3842 if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) && 3843 IS_QLA2100(ha)) 3844 return; 3845 /* 3846 * In tgt_stop mode we also should allow all requests to pass. 3847 * Otherwise, some commands can stuck. 3848 */ 3849 3850 tgt->irq_cmd_count++; 3851 3852 switch (code) { 3853 case MBA_RESET: /* Reset */ 3854 case MBA_SYSTEM_ERR: /* System Error */ 3855 case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */ 3856 case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */ 3857 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a, 3858 "qla_target(%d): System error async event %#x " 3859 "occurred", vha->vp_idx, code); 3860 break; 3861 case MBA_WAKEUP_THRES: /* Request Queue Wake-up. */ 3862 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 3863 break; 3864 3865 case MBA_LOOP_UP: 3866 { 3867 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b, 3868 "qla_target(%d): Async LOOP_UP occurred " 3869 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 3870 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 3871 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 3872 if (tgt->link_reinit_iocb_pending) { 3873 qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb, 3874 0, 0, 0, 0, 0, 0); 3875 tgt->link_reinit_iocb_pending = 0; 3876 } 3877 break; 3878 } 3879 3880 case MBA_LIP_OCCURRED: 3881 case MBA_LOOP_DOWN: 3882 case MBA_LIP_RESET: 3883 case MBA_RSCN_UPDATE: 3884 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c, 3885 "qla_target(%d): Async event %#x occurred " 3886 "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code, 3887 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 3888 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 3889 break; 3890 3891 case MBA_PORT_UPDATE: 3892 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d, 3893 "qla_target(%d): Port update async event %#x " 3894 "occurred: updating the ports database (m[0]=%x, m[1]=%x, " 3895 "m[2]=%x, m[3]=%x)", vha->vp_idx, code, 3896 le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 3897 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 3898 3899 login_code = le16_to_cpu(mailbox[2]); 3900 if (login_code == 0x4) 3901 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e, 3902 "Async MB 2: Got PLOGI Complete\n"); 3903 else if (login_code == 0x7) 3904 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f, 3905 "Async MB 2: Port Logged Out\n"); 3906 break; 3907 3908 default: 3909 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040, 3910 "qla_target(%d): Async event %#x occurred: " 3911 "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, 3912 code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]), 3913 le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3])); 3914 break; 3915 } 3916 3917 tgt->irq_cmd_count--; 3918 } 3919 3920 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha, 3921 uint16_t loop_id) 3922 { 3923 fc_port_t *fcport; 3924 int rc; 3925 3926 fcport = kzalloc(sizeof(*fcport), GFP_KERNEL); 3927 if (!fcport) { 3928 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f, 3929 "qla_target(%d): Allocation of tmp FC port failed", 3930 vha->vp_idx); 3931 return NULL; 3932 } 3933 3934 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id); 3935 3936 fcport->loop_id = loop_id; 3937 3938 rc = qla2x00_get_port_database(vha, fcport, 0); 3939 if (rc != QLA_SUCCESS) { 3940 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070, 3941 "qla_target(%d): Failed to retrieve fcport " 3942 "information -- get_port_database() returned %x " 3943 "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id); 3944 kfree(fcport); 3945 return NULL; 3946 } 3947 3948 return fcport; 3949 } 3950 3951 /* Must be called under tgt_mutex */ 3952 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha, 3953 uint8_t *s_id) 3954 { 3955 struct qla_hw_data *ha = vha->hw; 3956 struct qla_tgt_sess *sess = NULL; 3957 fc_port_t *fcport = NULL; 3958 int rc, global_resets; 3959 uint16_t loop_id = 0; 3960 3961 retry: 3962 global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count); 3963 3964 rc = qla24xx_get_loop_id(vha, s_id, &loop_id); 3965 if (rc != 0) { 3966 if ((s_id[0] == 0xFF) && 3967 (s_id[1] == 0xFC)) { 3968 /* 3969 * This is Domain Controller, so it should be 3970 * OK to drop SCSI commands from it. 3971 */ 3972 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042, 3973 "Unable to find initiator with S_ID %x:%x:%x", 3974 s_id[0], s_id[1], s_id[2]); 3975 } else 3976 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071, 3977 "qla_target(%d): Unable to find " 3978 "initiator with S_ID %x:%x:%x", 3979 vha->vp_idx, s_id[0], s_id[1], 3980 s_id[2]); 3981 return NULL; 3982 } 3983 3984 fcport = qlt_get_port_database(vha, loop_id); 3985 if (!fcport) 3986 return NULL; 3987 3988 if (global_resets != 3989 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) { 3990 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043, 3991 "qla_target(%d): global reset during session discovery " 3992 "(counter was %d, new %d), retrying", vha->vp_idx, 3993 global_resets, 3994 atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)); 3995 goto retry; 3996 } 3997 3998 sess = qlt_create_sess(vha, fcport, true); 3999 4000 kfree(fcport); 4001 return sess; 4002 } 4003 4004 static void qlt_abort_work(struct qla_tgt *tgt, 4005 struct qla_tgt_sess_work_param *prm) 4006 { 4007 struct scsi_qla_host *vha = tgt->vha; 4008 struct qla_hw_data *ha = vha->hw; 4009 struct qla_tgt_sess *sess = NULL; 4010 unsigned long flags; 4011 uint32_t be_s_id; 4012 uint8_t s_id[3]; 4013 int rc; 4014 4015 spin_lock_irqsave(&ha->hardware_lock, flags); 4016 4017 if (tgt->tgt_stop) 4018 goto out_term; 4019 4020 s_id[0] = prm->abts.fcp_hdr_le.s_id[2]; 4021 s_id[1] = prm->abts.fcp_hdr_le.s_id[1]; 4022 s_id[2] = prm->abts.fcp_hdr_le.s_id[0]; 4023 4024 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, 4025 (unsigned char *)&be_s_id); 4026 if (!sess) { 4027 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4028 4029 mutex_lock(&ha->tgt.tgt_mutex); 4030 sess = qlt_make_local_sess(vha, s_id); 4031 /* sess has got an extra creation ref */ 4032 mutex_unlock(&ha->tgt.tgt_mutex); 4033 4034 spin_lock_irqsave(&ha->hardware_lock, flags); 4035 if (!sess) 4036 goto out_term; 4037 } else { 4038 kref_get(&sess->se_sess->sess_kref); 4039 } 4040 4041 if (tgt->tgt_stop) 4042 goto out_term; 4043 4044 rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess); 4045 if (rc != 0) 4046 goto out_term; 4047 4048 ha->tgt.tgt_ops->put_sess(sess); 4049 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4050 return; 4051 4052 out_term: 4053 qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false); 4054 if (sess) 4055 ha->tgt.tgt_ops->put_sess(sess); 4056 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4057 } 4058 4059 static void qlt_tmr_work(struct qla_tgt *tgt, 4060 struct qla_tgt_sess_work_param *prm) 4061 { 4062 struct atio_from_isp *a = &prm->tm_iocb2; 4063 struct scsi_qla_host *vha = tgt->vha; 4064 struct qla_hw_data *ha = vha->hw; 4065 struct qla_tgt_sess *sess = NULL; 4066 unsigned long flags; 4067 uint8_t *s_id = NULL; /* to hide compiler warnings */ 4068 int rc; 4069 uint32_t lun, unpacked_lun; 4070 int lun_size, fn; 4071 void *iocb; 4072 4073 spin_lock_irqsave(&ha->hardware_lock, flags); 4074 4075 if (tgt->tgt_stop) 4076 goto out_term; 4077 4078 s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id; 4079 sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id); 4080 if (!sess) { 4081 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4082 4083 mutex_lock(&ha->tgt.tgt_mutex); 4084 sess = qlt_make_local_sess(vha, s_id); 4085 /* sess has got an extra creation ref */ 4086 mutex_unlock(&ha->tgt.tgt_mutex); 4087 4088 spin_lock_irqsave(&ha->hardware_lock, flags); 4089 if (!sess) 4090 goto out_term; 4091 } else { 4092 kref_get(&sess->se_sess->sess_kref); 4093 } 4094 4095 iocb = a; 4096 lun = a->u.isp24.fcp_cmnd.lun; 4097 lun_size = sizeof(lun); 4098 fn = a->u.isp24.fcp_cmnd.task_mgmt_flags; 4099 unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); 4100 4101 rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0); 4102 if (rc != 0) 4103 goto out_term; 4104 4105 ha->tgt.tgt_ops->put_sess(sess); 4106 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4107 return; 4108 4109 out_term: 4110 qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1); 4111 if (sess) 4112 ha->tgt.tgt_ops->put_sess(sess); 4113 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4114 } 4115 4116 static void qlt_sess_work_fn(struct work_struct *work) 4117 { 4118 struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work); 4119 struct scsi_qla_host *vha = tgt->vha; 4120 unsigned long flags; 4121 4122 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt); 4123 4124 spin_lock_irqsave(&tgt->sess_work_lock, flags); 4125 while (!list_empty(&tgt->sess_works_list)) { 4126 struct qla_tgt_sess_work_param *prm = list_entry( 4127 tgt->sess_works_list.next, typeof(*prm), 4128 sess_works_list_entry); 4129 4130 /* 4131 * This work can be scheduled on several CPUs at time, so we 4132 * must delete the entry to eliminate double processing 4133 */ 4134 list_del(&prm->sess_works_list_entry); 4135 4136 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 4137 4138 switch (prm->type) { 4139 case QLA_TGT_SESS_WORK_ABORT: 4140 qlt_abort_work(tgt, prm); 4141 break; 4142 case QLA_TGT_SESS_WORK_TM: 4143 qlt_tmr_work(tgt, prm); 4144 break; 4145 default: 4146 BUG_ON(1); 4147 break; 4148 } 4149 4150 spin_lock_irqsave(&tgt->sess_work_lock, flags); 4151 4152 kfree(prm); 4153 } 4154 spin_unlock_irqrestore(&tgt->sess_work_lock, flags); 4155 } 4156 4157 /* Must be called under tgt_host_action_mutex */ 4158 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha) 4159 { 4160 struct qla_tgt *tgt; 4161 4162 if (!QLA_TGT_MODE_ENABLED()) 4163 return 0; 4164 4165 if (!IS_TGT_MODE_CAPABLE(ha)) { 4166 ql_log(ql_log_warn, base_vha, 0xe070, 4167 "This adapter does not support target mode.\n"); 4168 return 0; 4169 } 4170 4171 ql_dbg(ql_dbg_tgt, base_vha, 0xe03b, 4172 "Registering target for host %ld(%p)", base_vha->host_no, ha); 4173 4174 BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL)); 4175 4176 tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL); 4177 if (!tgt) { 4178 ql_dbg(ql_dbg_tgt, base_vha, 0xe066, 4179 "Unable to allocate struct qla_tgt\n"); 4180 return -ENOMEM; 4181 } 4182 4183 if (!(base_vha->host->hostt->supported_mode & MODE_TARGET)) 4184 base_vha->host->hostt->supported_mode |= MODE_TARGET; 4185 4186 tgt->ha = ha; 4187 tgt->vha = base_vha; 4188 init_waitqueue_head(&tgt->waitQ); 4189 INIT_LIST_HEAD(&tgt->sess_list); 4190 INIT_LIST_HEAD(&tgt->del_sess_list); 4191 INIT_DELAYED_WORK(&tgt->sess_del_work, 4192 (void (*)(struct work_struct *))qlt_del_sess_work_fn); 4193 spin_lock_init(&tgt->sess_work_lock); 4194 INIT_WORK(&tgt->sess_work, qlt_sess_work_fn); 4195 INIT_LIST_HEAD(&tgt->sess_works_list); 4196 spin_lock_init(&tgt->srr_lock); 4197 INIT_LIST_HEAD(&tgt->srr_ctio_list); 4198 INIT_LIST_HEAD(&tgt->srr_imm_list); 4199 INIT_WORK(&tgt->srr_work, qlt_handle_srr_work); 4200 atomic_set(&tgt->tgt_global_resets_count, 0); 4201 4202 ha->tgt.qla_tgt = tgt; 4203 4204 ql_dbg(ql_dbg_tgt, base_vha, 0xe067, 4205 "qla_target(%d): using 64 Bit PCI addressing", 4206 base_vha->vp_idx); 4207 tgt->tgt_enable_64bit_addr = 1; 4208 /* 3 is reserved */ 4209 tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3); 4210 tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX; 4211 tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX; 4212 4213 mutex_lock(&qla_tgt_mutex); 4214 list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist); 4215 mutex_unlock(&qla_tgt_mutex); 4216 4217 return 0; 4218 } 4219 4220 /* Must be called under tgt_host_action_mutex */ 4221 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha) 4222 { 4223 if (!ha->tgt.qla_tgt) 4224 return 0; 4225 4226 mutex_lock(&qla_tgt_mutex); 4227 list_del(&ha->tgt.qla_tgt->tgt_list_entry); 4228 mutex_unlock(&qla_tgt_mutex); 4229 4230 ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)", 4231 vha->host_no, ha); 4232 qlt_release(ha->tgt.qla_tgt); 4233 4234 return 0; 4235 } 4236 4237 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn, 4238 unsigned char *b) 4239 { 4240 int i; 4241 4242 pr_debug("qla2xxx HW vha->node_name: "); 4243 for (i = 0; i < WWN_SIZE; i++) 4244 pr_debug("%02x ", vha->node_name[i]); 4245 pr_debug("\n"); 4246 pr_debug("qla2xxx HW vha->port_name: "); 4247 for (i = 0; i < WWN_SIZE; i++) 4248 pr_debug("%02x ", vha->port_name[i]); 4249 pr_debug("\n"); 4250 4251 pr_debug("qla2xxx passed configfs WWPN: "); 4252 put_unaligned_be64(wwpn, b); 4253 for (i = 0; i < WWN_SIZE; i++) 4254 pr_debug("%02x ", b[i]); 4255 pr_debug("\n"); 4256 } 4257 4258 /** 4259 * qla_tgt_lport_register - register lport with external module 4260 * 4261 * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops 4262 * @wwpn: Passwd FC target WWPN 4263 * @callback: lport initialization callback for tcm_qla2xxx code 4264 * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data 4265 */ 4266 int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn, 4267 int (*callback)(struct scsi_qla_host *), void *target_lport_ptr) 4268 { 4269 struct qla_tgt *tgt; 4270 struct scsi_qla_host *vha; 4271 struct qla_hw_data *ha; 4272 struct Scsi_Host *host; 4273 unsigned long flags; 4274 int rc; 4275 u8 b[WWN_SIZE]; 4276 4277 mutex_lock(&qla_tgt_mutex); 4278 list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) { 4279 vha = tgt->vha; 4280 ha = vha->hw; 4281 4282 host = vha->host; 4283 if (!host) 4284 continue; 4285 4286 if (ha->tgt.tgt_ops != NULL) 4287 continue; 4288 4289 if (!(host->hostt->supported_mode & MODE_TARGET)) 4290 continue; 4291 4292 spin_lock_irqsave(&ha->hardware_lock, flags); 4293 if (host->active_mode & MODE_TARGET) { 4294 pr_debug("MODE_TARGET already active on qla2xxx(%d)\n", 4295 host->host_no); 4296 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4297 continue; 4298 } 4299 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4300 4301 if (!scsi_host_get(host)) { 4302 ql_dbg(ql_dbg_tgt, vha, 0xe068, 4303 "Unable to scsi_host_get() for" 4304 " qla2xxx scsi_host\n"); 4305 continue; 4306 } 4307 qlt_lport_dump(vha, wwpn, b); 4308 4309 if (memcmp(vha->port_name, b, WWN_SIZE)) { 4310 scsi_host_put(host); 4311 continue; 4312 } 4313 /* 4314 * Setup passed parameters ahead of invoking callback 4315 */ 4316 ha->tgt.tgt_ops = qla_tgt_ops; 4317 ha->tgt.target_lport_ptr = target_lport_ptr; 4318 rc = (*callback)(vha); 4319 if (rc != 0) { 4320 ha->tgt.tgt_ops = NULL; 4321 ha->tgt.target_lport_ptr = NULL; 4322 } 4323 mutex_unlock(&qla_tgt_mutex); 4324 return rc; 4325 } 4326 mutex_unlock(&qla_tgt_mutex); 4327 4328 return -ENODEV; 4329 } 4330 EXPORT_SYMBOL(qlt_lport_register); 4331 4332 /** 4333 * qla_tgt_lport_deregister - Degister lport 4334 * 4335 * @vha: Registered scsi_qla_host pointer 4336 */ 4337 void qlt_lport_deregister(struct scsi_qla_host *vha) 4338 { 4339 struct qla_hw_data *ha = vha->hw; 4340 struct Scsi_Host *sh = vha->host; 4341 /* 4342 * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data 4343 */ 4344 ha->tgt.target_lport_ptr = NULL; 4345 ha->tgt.tgt_ops = NULL; 4346 /* 4347 * Release the Scsi_Host reference for the underlying qla2xxx host 4348 */ 4349 scsi_host_put(sh); 4350 } 4351 EXPORT_SYMBOL(qlt_lport_deregister); 4352 4353 /* Must be called under HW lock */ 4354 void qlt_set_mode(struct scsi_qla_host *vha) 4355 { 4356 struct qla_hw_data *ha = vha->hw; 4357 4358 switch (ql2x_ini_mode) { 4359 case QLA2XXX_INI_MODE_DISABLED: 4360 case QLA2XXX_INI_MODE_EXCLUSIVE: 4361 vha->host->active_mode = MODE_TARGET; 4362 break; 4363 case QLA2XXX_INI_MODE_ENABLED: 4364 vha->host->active_mode |= MODE_TARGET; 4365 break; 4366 default: 4367 break; 4368 } 4369 4370 if (ha->tgt.ini_mode_force_reverse) 4371 qla_reverse_ini_mode(vha); 4372 } 4373 4374 /* Must be called under HW lock */ 4375 void qlt_clear_mode(struct scsi_qla_host *vha) 4376 { 4377 struct qla_hw_data *ha = vha->hw; 4378 4379 switch (ql2x_ini_mode) { 4380 case QLA2XXX_INI_MODE_DISABLED: 4381 vha->host->active_mode = MODE_UNKNOWN; 4382 break; 4383 case QLA2XXX_INI_MODE_EXCLUSIVE: 4384 vha->host->active_mode = MODE_INITIATOR; 4385 break; 4386 case QLA2XXX_INI_MODE_ENABLED: 4387 vha->host->active_mode &= ~MODE_TARGET; 4388 break; 4389 default: 4390 break; 4391 } 4392 4393 if (ha->tgt.ini_mode_force_reverse) 4394 qla_reverse_ini_mode(vha); 4395 } 4396 4397 /* 4398 * qla_tgt_enable_vha - NO LOCK HELD 4399 * 4400 * host_reset, bring up w/ Target Mode Enabled 4401 */ 4402 void 4403 qlt_enable_vha(struct scsi_qla_host *vha) 4404 { 4405 struct qla_hw_data *ha = vha->hw; 4406 struct qla_tgt *tgt = ha->tgt.qla_tgt; 4407 unsigned long flags; 4408 4409 if (!tgt) { 4410 ql_dbg(ql_dbg_tgt, vha, 0xe069, 4411 "Unable to locate qla_tgt pointer from" 4412 " struct qla_hw_data\n"); 4413 dump_stack(); 4414 return; 4415 } 4416 4417 spin_lock_irqsave(&ha->hardware_lock, flags); 4418 tgt->tgt_stopped = 0; 4419 qlt_set_mode(vha); 4420 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4421 4422 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 4423 qla2xxx_wake_dpc(vha); 4424 qla2x00_wait_for_hba_online(vha); 4425 } 4426 EXPORT_SYMBOL(qlt_enable_vha); 4427 4428 /* 4429 * qla_tgt_disable_vha - NO LOCK HELD 4430 * 4431 * Disable Target Mode and reset the adapter 4432 */ 4433 void 4434 qlt_disable_vha(struct scsi_qla_host *vha) 4435 { 4436 struct qla_hw_data *ha = vha->hw; 4437 struct qla_tgt *tgt = ha->tgt.qla_tgt; 4438 unsigned long flags; 4439 4440 if (!tgt) { 4441 ql_dbg(ql_dbg_tgt, vha, 0xe06a, 4442 "Unable to locate qla_tgt pointer from" 4443 " struct qla_hw_data\n"); 4444 dump_stack(); 4445 return; 4446 } 4447 4448 spin_lock_irqsave(&ha->hardware_lock, flags); 4449 qlt_clear_mode(vha); 4450 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4451 4452 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags); 4453 qla2xxx_wake_dpc(vha); 4454 qla2x00_wait_for_hba_online(vha); 4455 } 4456 4457 /* 4458 * Called from qla_init.c:qla24xx_vport_create() contex to setup 4459 * the target mode specific struct scsi_qla_host and struct qla_hw_data 4460 * members. 4461 */ 4462 void 4463 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha) 4464 { 4465 if (!qla_tgt_mode_enabled(vha)) 4466 return; 4467 4468 mutex_init(&ha->tgt.tgt_mutex); 4469 mutex_init(&ha->tgt.tgt_host_action_mutex); 4470 4471 qlt_clear_mode(vha); 4472 4473 /* 4474 * NOTE: Currently the value is kept the same for <24xx and 4475 * >=24xx ISPs. If it is necessary to change it, 4476 * the check should be added for specific ISPs, 4477 * assigning the value appropriately. 4478 */ 4479 ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX; 4480 } 4481 4482 void 4483 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req) 4484 { 4485 /* 4486 * FC-4 Feature bit 0 indicates target functionality to the name server. 4487 */ 4488 if (qla_tgt_mode_enabled(vha)) { 4489 if (qla_ini_mode_enabled(vha)) 4490 ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1; 4491 else 4492 ct_req->req.rff_id.fc4_feature = BIT_0; 4493 } else if (qla_ini_mode_enabled(vha)) { 4494 ct_req->req.rff_id.fc4_feature = BIT_1; 4495 } 4496 } 4497 4498 /* 4499 * qlt_init_atio_q_entries() - Initializes ATIO queue entries. 4500 * @ha: HA context 4501 * 4502 * Beginning of ATIO ring has initialization control block already built 4503 * by nvram config routine. 4504 * 4505 * Returns 0 on success. 4506 */ 4507 void 4508 qlt_init_atio_q_entries(struct scsi_qla_host *vha) 4509 { 4510 struct qla_hw_data *ha = vha->hw; 4511 uint16_t cnt; 4512 struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring; 4513 4514 if (!qla_tgt_mode_enabled(vha)) 4515 return; 4516 4517 for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) { 4518 pkt->u.raw.signature = ATIO_PROCESSED; 4519 pkt++; 4520 } 4521 4522 } 4523 4524 /* 4525 * qlt_24xx_process_atio_queue() - Process ATIO queue entries. 4526 * @ha: SCSI driver HA context 4527 */ 4528 void 4529 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha) 4530 { 4531 struct qla_hw_data *ha = vha->hw; 4532 struct atio_from_isp *pkt; 4533 int cnt, i; 4534 4535 if (!vha->flags.online) 4536 return; 4537 4538 while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) { 4539 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 4540 cnt = pkt->u.raw.entry_count; 4541 4542 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt); 4543 4544 for (i = 0; i < cnt; i++) { 4545 ha->tgt.atio_ring_index++; 4546 if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) { 4547 ha->tgt.atio_ring_index = 0; 4548 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring; 4549 } else 4550 ha->tgt.atio_ring_ptr++; 4551 4552 pkt->u.raw.signature = ATIO_PROCESSED; 4553 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr; 4554 } 4555 wmb(); 4556 } 4557 4558 /* Adjust ring index */ 4559 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index); 4560 } 4561 4562 void 4563 qlt_24xx_config_rings(struct scsi_qla_host *vha) 4564 { 4565 struct qla_hw_data *ha = vha->hw; 4566 if (!QLA_TGT_MODE_ENABLED()) 4567 return; 4568 4569 WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0); 4570 WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0); 4571 RD_REG_DWORD(ISP_ATIO_Q_OUT(vha)); 4572 4573 if (IS_ATIO_MSIX_CAPABLE(ha)) { 4574 struct qla_msix_entry *msix = &ha->msix_entries[2]; 4575 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb; 4576 4577 icb->msix_atio = cpu_to_le16(msix->entry); 4578 ql_dbg(ql_dbg_init, vha, 0xf072, 4579 "Registering ICB vector 0x%x for atio que.\n", 4580 msix->entry); 4581 } 4582 } 4583 4584 void 4585 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv) 4586 { 4587 struct qla_hw_data *ha = vha->hw; 4588 4589 if (qla_tgt_mode_enabled(vha)) { 4590 if (!ha->tgt.saved_set) { 4591 /* We save only once */ 4592 ha->tgt.saved_exchange_count = nv->exchange_count; 4593 ha->tgt.saved_firmware_options_1 = 4594 nv->firmware_options_1; 4595 ha->tgt.saved_firmware_options_2 = 4596 nv->firmware_options_2; 4597 ha->tgt.saved_firmware_options_3 = 4598 nv->firmware_options_3; 4599 ha->tgt.saved_set = 1; 4600 } 4601 4602 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 4603 4604 /* Enable target mode */ 4605 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 4606 4607 /* Disable ini mode, if requested */ 4608 if (!qla_ini_mode_enabled(vha)) 4609 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5); 4610 4611 /* Disable Full Login after LIP */ 4612 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 4613 /* Enable initial LIP */ 4614 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 4615 /* Enable FC tapes support */ 4616 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12); 4617 /* Disable Full Login after LIP */ 4618 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 4619 /* Enable target PRLI control */ 4620 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 4621 } else { 4622 if (ha->tgt.saved_set) { 4623 nv->exchange_count = ha->tgt.saved_exchange_count; 4624 nv->firmware_options_1 = 4625 ha->tgt.saved_firmware_options_1; 4626 nv->firmware_options_2 = 4627 ha->tgt.saved_firmware_options_2; 4628 nv->firmware_options_3 = 4629 ha->tgt.saved_firmware_options_3; 4630 } 4631 return; 4632 } 4633 4634 /* out-of-order frames reassembly */ 4635 nv->firmware_options_3 |= BIT_6|BIT_9; 4636 4637 if (ha->tgt.enable_class_2) { 4638 if (vha->flags.init_done) 4639 fc_host_supported_classes(vha->host) = 4640 FC_COS_CLASS2 | FC_COS_CLASS3; 4641 4642 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 4643 } else { 4644 if (vha->flags.init_done) 4645 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 4646 4647 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 4648 } 4649 } 4650 4651 void 4652 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha, 4653 struct init_cb_24xx *icb) 4654 { 4655 struct qla_hw_data *ha = vha->hw; 4656 4657 if (ha->tgt.node_name_set) { 4658 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 4659 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 4660 } 4661 } 4662 4663 void 4664 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv) 4665 { 4666 struct qla_hw_data *ha = vha->hw; 4667 4668 if (!QLA_TGT_MODE_ENABLED()) 4669 return; 4670 4671 if (qla_tgt_mode_enabled(vha)) { 4672 if (!ha->tgt.saved_set) { 4673 /* We save only once */ 4674 ha->tgt.saved_exchange_count = nv->exchange_count; 4675 ha->tgt.saved_firmware_options_1 = 4676 nv->firmware_options_1; 4677 ha->tgt.saved_firmware_options_2 = 4678 nv->firmware_options_2; 4679 ha->tgt.saved_firmware_options_3 = 4680 nv->firmware_options_3; 4681 ha->tgt.saved_set = 1; 4682 } 4683 4684 nv->exchange_count = __constant_cpu_to_le16(0xFFFF); 4685 4686 /* Enable target mode */ 4687 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4); 4688 4689 /* Disable ini mode, if requested */ 4690 if (!qla_ini_mode_enabled(vha)) 4691 nv->firmware_options_1 |= 4692 __constant_cpu_to_le32(BIT_5); 4693 4694 /* Disable Full Login after LIP */ 4695 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13); 4696 /* Enable initial LIP */ 4697 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9); 4698 /* Enable FC tapes support */ 4699 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12); 4700 /* Disable Full Login after LIP */ 4701 nv->host_p &= __constant_cpu_to_le32(~BIT_10); 4702 /* Enable target PRLI control */ 4703 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14); 4704 } else { 4705 if (ha->tgt.saved_set) { 4706 nv->exchange_count = ha->tgt.saved_exchange_count; 4707 nv->firmware_options_1 = 4708 ha->tgt.saved_firmware_options_1; 4709 nv->firmware_options_2 = 4710 ha->tgt.saved_firmware_options_2; 4711 nv->firmware_options_3 = 4712 ha->tgt.saved_firmware_options_3; 4713 } 4714 return; 4715 } 4716 4717 /* out-of-order frames reassembly */ 4718 nv->firmware_options_3 |= BIT_6|BIT_9; 4719 4720 if (ha->tgt.enable_class_2) { 4721 if (vha->flags.init_done) 4722 fc_host_supported_classes(vha->host) = 4723 FC_COS_CLASS2 | FC_COS_CLASS3; 4724 4725 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8); 4726 } else { 4727 if (vha->flags.init_done) 4728 fc_host_supported_classes(vha->host) = FC_COS_CLASS3; 4729 4730 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8); 4731 } 4732 } 4733 4734 void 4735 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha, 4736 struct init_cb_81xx *icb) 4737 { 4738 struct qla_hw_data *ha = vha->hw; 4739 4740 if (!QLA_TGT_MODE_ENABLED()) 4741 return; 4742 4743 if (ha->tgt.node_name_set) { 4744 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE); 4745 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14); 4746 } 4747 } 4748 4749 void 4750 qlt_83xx_iospace_config(struct qla_hw_data *ha) 4751 { 4752 if (!QLA_TGT_MODE_ENABLED()) 4753 return; 4754 4755 ha->msix_count += 1; /* For ATIO Q */ 4756 } 4757 4758 int 4759 qlt_24xx_process_response_error(struct scsi_qla_host *vha, 4760 struct sts_entry_24xx *pkt) 4761 { 4762 switch (pkt->entry_type) { 4763 case ABTS_RECV_24XX: 4764 case ABTS_RESP_24XX: 4765 case CTIO_TYPE7: 4766 case NOTIFY_ACK_TYPE: 4767 return 1; 4768 default: 4769 return 0; 4770 } 4771 } 4772 4773 void 4774 qlt_modify_vp_config(struct scsi_qla_host *vha, 4775 struct vp_config_entry_24xx *vpmod) 4776 { 4777 if (qla_tgt_mode_enabled(vha)) 4778 vpmod->options_idx1 &= ~BIT_5; 4779 /* Disable ini mode, if requested */ 4780 if (!qla_ini_mode_enabled(vha)) 4781 vpmod->options_idx1 &= ~BIT_4; 4782 } 4783 4784 void 4785 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha) 4786 { 4787 if (!QLA_TGT_MODE_ENABLED()) 4788 return; 4789 4790 if (ha->mqenable || IS_QLA83XX(ha)) { 4791 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in; 4792 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out; 4793 } else { 4794 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in; 4795 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out; 4796 } 4797 4798 mutex_init(&ha->tgt.tgt_mutex); 4799 mutex_init(&ha->tgt.tgt_host_action_mutex); 4800 qlt_clear_mode(base_vha); 4801 } 4802 4803 irqreturn_t 4804 qla83xx_msix_atio_q(int irq, void *dev_id) 4805 { 4806 struct rsp_que *rsp; 4807 scsi_qla_host_t *vha; 4808 struct qla_hw_data *ha; 4809 unsigned long flags; 4810 4811 rsp = (struct rsp_que *) dev_id; 4812 ha = rsp->hw; 4813 vha = pci_get_drvdata(ha->pdev); 4814 4815 spin_lock_irqsave(&ha->hardware_lock, flags); 4816 4817 qlt_24xx_process_atio_queue(vha); 4818 qla24xx_process_response_queue(vha, rsp); 4819 4820 spin_unlock_irqrestore(&ha->hardware_lock, flags); 4821 4822 return IRQ_HANDLED; 4823 } 4824 4825 int 4826 qlt_mem_alloc(struct qla_hw_data *ha) 4827 { 4828 if (!QLA_TGT_MODE_ENABLED()) 4829 return 0; 4830 4831 ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) * 4832 MAX_MULTI_ID_FABRIC, GFP_KERNEL); 4833 if (!ha->tgt.tgt_vp_map) 4834 return -ENOMEM; 4835 4836 ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev, 4837 (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp), 4838 &ha->tgt.atio_dma, GFP_KERNEL); 4839 if (!ha->tgt.atio_ring) { 4840 kfree(ha->tgt.tgt_vp_map); 4841 return -ENOMEM; 4842 } 4843 return 0; 4844 } 4845 4846 void 4847 qlt_mem_free(struct qla_hw_data *ha) 4848 { 4849 if (!QLA_TGT_MODE_ENABLED()) 4850 return; 4851 4852 if (ha->tgt.atio_ring) { 4853 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) * 4854 sizeof(struct atio_from_isp), ha->tgt.atio_ring, 4855 ha->tgt.atio_dma); 4856 } 4857 kfree(ha->tgt.tgt_vp_map); 4858 } 4859 4860 /* vport_slock to be held by the caller */ 4861 void 4862 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd) 4863 { 4864 if (!QLA_TGT_MODE_ENABLED()) 4865 return; 4866 4867 switch (cmd) { 4868 case SET_VP_IDX: 4869 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha; 4870 break; 4871 case SET_AL_PA: 4872 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx; 4873 break; 4874 case RESET_VP_IDX: 4875 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL; 4876 break; 4877 case RESET_AL_PA: 4878 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0; 4879 break; 4880 } 4881 } 4882 4883 static int __init qlt_parse_ini_mode(void) 4884 { 4885 if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0) 4886 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE; 4887 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0) 4888 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED; 4889 else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0) 4890 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED; 4891 else 4892 return false; 4893 4894 return true; 4895 } 4896 4897 int __init qlt_init(void) 4898 { 4899 int ret; 4900 4901 if (!qlt_parse_ini_mode()) { 4902 ql_log(ql_log_fatal, NULL, 0xe06b, 4903 "qlt_parse_ini_mode() failed\n"); 4904 return -EINVAL; 4905 } 4906 4907 if (!QLA_TGT_MODE_ENABLED()) 4908 return 0; 4909 4910 qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep", 4911 sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0, 4912 NULL); 4913 if (!qla_tgt_cmd_cachep) { 4914 ql_log(ql_log_fatal, NULL, 0xe06c, 4915 "kmem_cache_create for qla_tgt_cmd_cachep failed\n"); 4916 return -ENOMEM; 4917 } 4918 4919 qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep", 4920 sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct 4921 qla_tgt_mgmt_cmd), 0, NULL); 4922 if (!qla_tgt_mgmt_cmd_cachep) { 4923 ql_log(ql_log_fatal, NULL, 0xe06d, 4924 "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n"); 4925 ret = -ENOMEM; 4926 goto out; 4927 } 4928 4929 qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab, 4930 mempool_free_slab, qla_tgt_mgmt_cmd_cachep); 4931 if (!qla_tgt_mgmt_cmd_mempool) { 4932 ql_log(ql_log_fatal, NULL, 0xe06e, 4933 "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n"); 4934 ret = -ENOMEM; 4935 goto out_mgmt_cmd_cachep; 4936 } 4937 4938 qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0); 4939 if (!qla_tgt_wq) { 4940 ql_log(ql_log_fatal, NULL, 0xe06f, 4941 "alloc_workqueue for qla_tgt_wq failed\n"); 4942 ret = -ENOMEM; 4943 goto out_cmd_mempool; 4944 } 4945 /* 4946 * Return 1 to signal that initiator-mode is being disabled 4947 */ 4948 return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0; 4949 4950 out_cmd_mempool: 4951 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 4952 out_mgmt_cmd_cachep: 4953 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 4954 out: 4955 kmem_cache_destroy(qla_tgt_cmd_cachep); 4956 return ret; 4957 } 4958 4959 void qlt_exit(void) 4960 { 4961 if (!QLA_TGT_MODE_ENABLED()) 4962 return; 4963 4964 destroy_workqueue(qla_tgt_wq); 4965 mempool_destroy(qla_tgt_mgmt_cmd_mempool); 4966 kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep); 4967 kmem_cache_destroy(qla_tgt_cmd_cachep); 4968 } 4969