1/* 2 * Aic94xx SAS/SATA Tasks 3 * 4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved. 5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> 6 * 7 * This file is licensed under GPLv2. 8 * 9 * This file is part of the aic94xx driver. 10 * 11 * The aic94xx driver is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License as 13 * published by the Free Software Foundation; version 2 of the 14 * License. 15 * 16 * The aic94xx driver is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with the aic94xx driver; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 24 * 25 */ 26 27#include <linux/spinlock.h> 28#include "aic94xx.h" 29#include "aic94xx_sas.h" 30#include "aic94xx_hwi.h" 31 32static void asd_unbuild_ata_ascb(struct asd_ascb *a); 33static void asd_unbuild_smp_ascb(struct asd_ascb *a); 34static void asd_unbuild_ssp_ascb(struct asd_ascb *a); 35 36static void asd_can_dequeue(struct asd_ha_struct *asd_ha, int num) 37{ 38 unsigned long flags; 39 40 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); 41 asd_ha->seq.can_queue += num; 42 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); 43} 44 45/* PCI_DMA_... to our direction translation. 46 */ 47static const u8 data_dir_flags[] = { 48 [PCI_DMA_BIDIRECTIONAL] = DATA_DIR_BYRECIPIENT, /* UNSPECIFIED */ 49 [PCI_DMA_TODEVICE] = DATA_DIR_OUT, /* OUTBOUND */ 50 [PCI_DMA_FROMDEVICE] = DATA_DIR_IN, /* INBOUND */ 51 [PCI_DMA_NONE] = DATA_DIR_NONE, /* NO TRANSFER */ 52}; 53 54static int asd_map_scatterlist(struct sas_task *task, 55 struct sg_el *sg_arr, 56 gfp_t gfp_flags) 57{ 58 struct asd_ascb *ascb = task->lldd_task; 59 struct asd_ha_struct *asd_ha = ascb->ha; 60 struct scatterlist *sc; 61 int num_sg, res; 62 63 if (task->data_dir == PCI_DMA_NONE) 64 return 0; 65 66 if (task->num_scatter == 0) { 67 void *p = task->scatter; 68 dma_addr_t dma = pci_map_single(asd_ha->pcidev, p, 69 task->total_xfer_len, 70 task->data_dir); 71 sg_arr[0].bus_addr = cpu_to_le64((u64)dma); 72 sg_arr[0].size = cpu_to_le32(task->total_xfer_len); 73 sg_arr[0].flags |= ASD_SG_EL_LIST_EOL; 74 return 0; 75 } 76 77 /* STP tasks come from libata which has already mapped 78 * the SG list */ 79 if (sas_protocol_ata(task->task_proto)) 80 num_sg = task->num_scatter; 81 else 82 num_sg = pci_map_sg(asd_ha->pcidev, task->scatter, 83 task->num_scatter, task->data_dir); 84 if (num_sg == 0) 85 return -ENOMEM; 86 87 if (num_sg > 3) { 88 int i; 89 90 ascb->sg_arr = asd_alloc_coherent(asd_ha, 91 num_sg*sizeof(struct sg_el), 92 gfp_flags); 93 if (!ascb->sg_arr) { 94 res = -ENOMEM; 95 goto err_unmap; 96 } 97 for_each_sg(task->scatter, sc, num_sg, i) { 98 struct sg_el *sg = 99 &((struct sg_el *)ascb->sg_arr->vaddr)[i]; 100 sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc)); 101 sg->size = cpu_to_le32((u32)sg_dma_len(sc)); 102 if (i == num_sg-1) 103 sg->flags |= ASD_SG_EL_LIST_EOL; 104 } 105 106 for_each_sg(task->scatter, sc, 2, i) { 107 sg_arr[i].bus_addr = 108 cpu_to_le64((u64)sg_dma_address(sc)); 109 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc)); 110 } 111 sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr); 112 sg_arr[1].flags |= ASD_SG_EL_LIST_EOS; 113 114 memset(&sg_arr[2], 0, sizeof(*sg_arr)); 115 sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle); 116 } else { 117 int i; 118 for_each_sg(task->scatter, sc, num_sg, i) { 119 sg_arr[i].bus_addr = 120 cpu_to_le64((u64)sg_dma_address(sc)); 121 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc)); 122 } 123 sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL; 124 } 125 126 return 0; 127err_unmap: 128 if (sas_protocol_ata(task->task_proto)) 129 pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter, 130 task->data_dir); 131 return res; 132} 133 134static void asd_unmap_scatterlist(struct asd_ascb *ascb) 135{ 136 struct asd_ha_struct *asd_ha = ascb->ha; 137 struct sas_task *task = ascb->uldd_task; 138 139 if (task->data_dir == PCI_DMA_NONE) 140 return; 141 142 if (task->num_scatter == 0) { 143 dma_addr_t dma = (dma_addr_t) 144 le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr); 145 pci_unmap_single(ascb->ha->pcidev, dma, task->total_xfer_len, 146 task->data_dir); 147 return; 148 } 149 150 asd_free_coherent(asd_ha, ascb->sg_arr); 151 if (task->task_proto != SAS_PROTOCOL_STP) 152 pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter, 153 task->data_dir); 154} 155 156/* ---------- Task complete tasklet ---------- */ 157 158static void asd_get_response_tasklet(struct asd_ascb *ascb, 159 struct done_list_struct *dl) 160{ 161 struct asd_ha_struct *asd_ha = ascb->ha; 162 struct sas_task *task = ascb->uldd_task; 163 struct task_status_struct *ts = &task->task_status; 164 unsigned long flags; 165 struct tc_resp_sb_struct { 166 __le16 index_escb; 167 u8 len_lsb; 168 u8 flags; 169 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block; 170 171/* int size = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */ 172 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1; 173 struct asd_ascb *escb; 174 struct asd_dma_tok *edb; 175 void *r; 176 177 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags); 178 escb = asd_tc_index_find(&asd_ha->seq, 179 (int)le16_to_cpu(resp_sb->index_escb)); 180 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags); 181 182 if (!escb) { 183 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n"); 184 return; 185 } 186 187 ts->buf_valid_size = 0; 188 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index]; 189 r = edb->vaddr; 190 if (task->task_proto == SAS_PROTOCOL_SSP) { 191 struct ssp_response_iu *iu = 192 r + 16 + sizeof(struct ssp_frame_hdr); 193 194 ts->residual = le32_to_cpu(*(__le32 *)r); 195 196 sas_ssp_task_response(&asd_ha->pcidev->dev, task, iu); 197 } else { 198 struct ata_task_resp *resp = (void *) &ts->buf[0]; 199 200 ts->residual = le32_to_cpu(*(__le32 *)r); 201 202 if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) { 203 resp->frame_len = le16_to_cpu(*(__le16 *)(r+6)); 204 memcpy(&resp->ending_fis[0], r+16, 24); 205 ts->buf_valid_size = sizeof(*resp); 206 } 207 } 208 209 asd_invalidate_edb(escb, edb_id); 210} 211 212static void asd_task_tasklet_complete(struct asd_ascb *ascb, 213 struct done_list_struct *dl) 214{ 215 struct sas_task *task = ascb->uldd_task; 216 struct task_status_struct *ts = &task->task_status; 217 unsigned long flags; 218 u8 opcode = dl->opcode; 219 220 asd_can_dequeue(ascb->ha, 1); 221 222Again: 223 switch (opcode) { 224 case TC_NO_ERROR: 225 ts->resp = SAS_TASK_COMPLETE; 226 ts->stat = SAM_STAT_GOOD; 227 break; 228 case TC_UNDERRUN: 229 ts->resp = SAS_TASK_COMPLETE; 230 ts->stat = SAS_DATA_UNDERRUN; 231 ts->residual = le32_to_cpu(*(__le32 *)dl->status_block); 232 break; 233 case TC_OVERRUN: 234 ts->resp = SAS_TASK_COMPLETE; 235 ts->stat = SAS_DATA_OVERRUN; 236 ts->residual = 0; 237 break; 238 case TC_SSP_RESP: 239 case TC_ATA_RESP: 240 ts->resp = SAS_TASK_COMPLETE; 241 ts->stat = SAS_PROTO_RESPONSE; 242 asd_get_response_tasklet(ascb, dl); 243 break; 244 case TF_OPEN_REJECT: 245 ts->resp = SAS_TASK_UNDELIVERED; 246 ts->stat = SAS_OPEN_REJECT; 247 if (dl->status_block[1] & 2) 248 ts->open_rej_reason = 1 + dl->status_block[2]; 249 else if (dl->status_block[1] & 1) 250 ts->open_rej_reason = (dl->status_block[2] >> 4)+10; 251 else 252 ts->open_rej_reason = SAS_OREJ_UNKNOWN; 253 break; 254 case TF_OPEN_TO: 255 ts->resp = SAS_TASK_UNDELIVERED; 256 ts->stat = SAS_OPEN_TO; 257 break; 258 case TF_PHY_DOWN: 259 case TU_PHY_DOWN: 260 ts->resp = SAS_TASK_UNDELIVERED; 261 ts->stat = SAS_PHY_DOWN; 262 break; 263 case TI_PHY_DOWN: 264 ts->resp = SAS_TASK_COMPLETE; 265 ts->stat = SAS_PHY_DOWN; 266 break; 267 case TI_BREAK: 268 case TI_PROTO_ERR: 269 case TI_NAK: 270 case TI_ACK_NAK_TO: 271 case TF_SMP_XMIT_RCV_ERR: 272 case TC_ATA_R_ERR_RECV: 273 ts->resp = SAS_TASK_COMPLETE; 274 ts->stat = SAS_INTERRUPTED; 275 break; 276 case TF_BREAK: 277 case TU_BREAK: 278 case TU_ACK_NAK_TO: 279 case TF_SMPRSP_TO: 280 ts->resp = SAS_TASK_UNDELIVERED; 281 ts->stat = SAS_DEV_NO_RESPONSE; 282 break; 283 case TF_NAK_RECV: 284 ts->resp = SAS_TASK_COMPLETE; 285 ts->stat = SAS_NAK_R_ERR; 286 break; 287 case TA_I_T_NEXUS_LOSS: 288 opcode = dl->status_block[0]; 289 goto Again; 290 break; 291 case TF_INV_CONN_HANDLE: 292 ts->resp = SAS_TASK_UNDELIVERED; 293 ts->stat = SAS_DEVICE_UNKNOWN; 294 break; 295 case TF_REQUESTED_N_PENDING: 296 ts->resp = SAS_TASK_UNDELIVERED; 297 ts->stat = SAS_PENDING; 298 break; 299 case TC_TASK_CLEARED: 300 case TA_ON_REQ: 301 ts->resp = SAS_TASK_COMPLETE; 302 ts->stat = SAS_ABORTED_TASK; 303 break; 304 305 case TF_NO_SMP_CONN: 306 case TF_TMF_NO_CTX: 307 case TF_TMF_NO_TAG: 308 case TF_TMF_TAG_FREE: 309 case TF_TMF_TASK_DONE: 310 case TF_TMF_NO_CONN_HANDLE: 311 case TF_IRTT_TO: 312 case TF_IU_SHORT: 313 case TF_DATA_OFFS_ERR: 314 ts->resp = SAS_TASK_UNDELIVERED; 315 ts->stat = SAS_DEV_NO_RESPONSE; 316 break; 317 318 case TC_LINK_ADM_RESP: 319 case TC_CONTROL_PHY: 320 case TC_RESUME: 321 case TC_PARTIAL_SG_LIST: 322 default: 323 ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __func__, opcode); 324 break; 325 } 326 327 switch (task->task_proto) { 328 case SAS_PROTOCOL_SATA: 329 case SAS_PROTOCOL_STP: 330 asd_unbuild_ata_ascb(ascb); 331 break; 332 case SAS_PROTOCOL_SMP: 333 asd_unbuild_smp_ascb(ascb); 334 break; 335 case SAS_PROTOCOL_SSP: 336 asd_unbuild_ssp_ascb(ascb); 337 default: 338 break; 339 } 340 341 spin_lock_irqsave(&task->task_state_lock, flags); 342 task->task_state_flags &= ~SAS_TASK_STATE_PENDING; 343 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; 344 task->task_state_flags |= SAS_TASK_STATE_DONE; 345 if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) { 346 struct completion *completion = ascb->completion; 347 spin_unlock_irqrestore(&task->task_state_lock, flags); 348 ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x " 349 "stat 0x%x but aborted by upper layer!\n", 350 task, opcode, ts->resp, ts->stat); 351 if (completion) 352 complete(completion); 353 } else { 354 spin_unlock_irqrestore(&task->task_state_lock, flags); 355 task->lldd_task = NULL; 356 asd_ascb_free(ascb); 357 mb(); 358 task->task_done(task); 359 } 360} 361 362/* ---------- ATA ---------- */ 363 364static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task, 365 gfp_t gfp_flags) 366{ 367 struct domain_device *dev = task->dev; 368 struct scb *scb; 369 u8 flags; 370 int res = 0; 371 372 scb = ascb->scb; 373 374 if (unlikely(task->ata_task.device_control_reg_update)) 375 scb->header.opcode = CONTROL_ATA_DEV; 376 else if (dev->sata_dev.command_set == ATA_COMMAND_SET) 377 scb->header.opcode = INITIATE_ATA_TASK; 378 else 379 scb->header.opcode = INITIATE_ATAPI_TASK; 380 381 scb->ata_task.proto_conn_rate = (1 << 5); /* STP */ 382 if (dev->port->oob_mode == SAS_OOB_MODE) 383 scb->ata_task.proto_conn_rate |= dev->linkrate; 384 385 scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); 386 scb->ata_task.fis = task->ata_task.fis; 387 if (likely(!task->ata_task.device_control_reg_update)) 388 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */ 389 scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */ 390 if (dev->sata_dev.command_set == ATAPI_COMMAND_SET) 391 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet, 392 16); 393 scb->ata_task.sister_scb = cpu_to_le16(0xFFFF); 394 scb->ata_task.conn_handle = cpu_to_le16( 395 (u16)(unsigned long)dev->lldd_dev); 396 397 if (likely(!task->ata_task.device_control_reg_update)) { 398 flags = 0; 399 if (task->ata_task.dma_xfer) 400 flags |= DATA_XFER_MODE_DMA; 401 if (task->ata_task.use_ncq && 402 dev->sata_dev.command_set != ATAPI_COMMAND_SET) 403 flags |= ATA_Q_TYPE_NCQ; 404 flags |= data_dir_flags[task->data_dir]; 405 scb->ata_task.ata_flags = flags; 406 407 scb->ata_task.retry_count = task->ata_task.retry_count; 408 409 flags = 0; 410 if (task->ata_task.set_affil_pol) 411 flags |= SET_AFFIL_POLICY; 412 if (task->ata_task.stp_affil_pol) 413 flags |= STP_AFFIL_POLICY; 414 scb->ata_task.flags = flags; 415 } 416 ascb->tasklet_complete = asd_task_tasklet_complete; 417 418 if (likely(!task->ata_task.device_control_reg_update)) 419 res = asd_map_scatterlist(task, scb->ata_task.sg_element, 420 gfp_flags); 421 422 return res; 423} 424 425static void asd_unbuild_ata_ascb(struct asd_ascb *a) 426{ 427 asd_unmap_scatterlist(a); 428} 429 430/* ---------- SMP ---------- */ 431 432static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task, 433 gfp_t gfp_flags) 434{ 435 struct asd_ha_struct *asd_ha = ascb->ha; 436 struct domain_device *dev = task->dev; 437 struct scb *scb; 438 439 pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_req, 1, 440 PCI_DMA_TODEVICE); 441 pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_resp, 1, 442 PCI_DMA_FROMDEVICE); 443 444 scb = ascb->scb; 445 446 scb->header.opcode = INITIATE_SMP_TASK; 447 448 scb->smp_task.proto_conn_rate = dev->linkrate; 449 450 scb->smp_task.smp_req.bus_addr = 451 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req)); 452 scb->smp_task.smp_req.size = 453 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4); 454 455 scb->smp_task.smp_resp.bus_addr = 456 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp)); 457 scb->smp_task.smp_resp.size = 458 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4); 459 460 scb->smp_task.sister_scb = cpu_to_le16(0xFFFF); 461 scb->smp_task.conn_handle = cpu_to_le16((u16) 462 (unsigned long)dev->lldd_dev); 463 464 ascb->tasklet_complete = asd_task_tasklet_complete; 465 466 return 0; 467} 468 469static void asd_unbuild_smp_ascb(struct asd_ascb *a) 470{ 471 struct sas_task *task = a->uldd_task; 472 473 BUG_ON(!task); 474 pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_req, 1, 475 PCI_DMA_TODEVICE); 476 pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_resp, 1, 477 PCI_DMA_FROMDEVICE); 478} 479 480/* ---------- SSP ---------- */ 481 482static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task, 483 gfp_t gfp_flags) 484{ 485 struct domain_device *dev = task->dev; 486 struct scb *scb; 487 int res = 0; 488 489 scb = ascb->scb; 490 491 scb->header.opcode = INITIATE_SSP_TASK; 492 493 scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */ 494 scb->ssp_task.proto_conn_rate |= dev->linkrate; 495 scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); 496 scb->ssp_task.ssp_frame.frame_type = SSP_DATA; 497 memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr, 498 HASHED_SAS_ADDR_SIZE); 499 memcpy(scb->ssp_task.ssp_frame.hashed_src_addr, 500 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); 501 scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); 502 503 memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8); 504 if (task->ssp_task.enable_first_burst) 505 scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK; 506 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3); 507 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7); 508 memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cdb, 16); 509 510 scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF); 511 scb->ssp_task.conn_handle = cpu_to_le16( 512 (u16)(unsigned long)dev->lldd_dev); 513 scb->ssp_task.data_dir = data_dir_flags[task->data_dir]; 514 scb->ssp_task.retry_count = scb->ssp_task.retry_count; 515 516 ascb->tasklet_complete = asd_task_tasklet_complete; 517 518 res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags); 519 520 return res; 521} 522 523static void asd_unbuild_ssp_ascb(struct asd_ascb *a) 524{ 525 asd_unmap_scatterlist(a); 526} 527 528/* ---------- Execute Task ---------- */ 529 530static int asd_can_queue(struct asd_ha_struct *asd_ha, int num) 531{ 532 int res = 0; 533 unsigned long flags; 534 535 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); 536 if ((asd_ha->seq.can_queue - num) < 0) 537 res = -SAS_QUEUE_FULL; 538 else 539 asd_ha->seq.can_queue -= num; 540 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); 541 542 return res; 543} 544 545int asd_execute_task(struct sas_task *task, const int num, 546 gfp_t gfp_flags) 547{ 548 int res = 0; 549 LIST_HEAD(alist); 550 struct sas_task *t = task; 551 struct asd_ascb *ascb = NULL, *a; 552 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; 553 unsigned long flags; 554 555 res = asd_can_queue(asd_ha, num); 556 if (res) 557 return res; 558 559 res = num; 560 ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags); 561 if (res) { 562 res = -ENOMEM; 563 goto out_err; 564 } 565 566 __list_add(&alist, ascb->list.prev, &ascb->list); 567 list_for_each_entry(a, &alist, list) { 568 a->uldd_task = t; 569 t->lldd_task = a; 570 t = list_entry(t->list.next, struct sas_task, list); 571 } 572 list_for_each_entry(a, &alist, list) { 573 t = a->uldd_task; 574 a->uldd_timer = 1; 575 if (t->task_proto & SAS_PROTOCOL_STP) 576 t->task_proto = SAS_PROTOCOL_STP; 577 switch (t->task_proto) { 578 case SAS_PROTOCOL_SATA: 579 case SAS_PROTOCOL_STP: 580 res = asd_build_ata_ascb(a, t, gfp_flags); 581 break; 582 case SAS_PROTOCOL_SMP: 583 res = asd_build_smp_ascb(a, t, gfp_flags); 584 break; 585 case SAS_PROTOCOL_SSP: 586 res = asd_build_ssp_ascb(a, t, gfp_flags); 587 break; 588 default: 589 asd_printk("unknown sas_task proto: 0x%x\n", 590 t->task_proto); 591 res = -ENOMEM; 592 break; 593 } 594 if (res) 595 goto out_err_unmap; 596 597 spin_lock_irqsave(&t->task_state_lock, flags); 598 t->task_state_flags |= SAS_TASK_AT_INITIATOR; 599 spin_unlock_irqrestore(&t->task_state_lock, flags); 600 } 601 list_del_init(&alist); 602 603 res = asd_post_ascb_list(asd_ha, ascb, num); 604 if (unlikely(res)) { 605 a = NULL; 606 __list_add(&alist, ascb->list.prev, &ascb->list); 607 goto out_err_unmap; 608 } 609 610 return 0; 611out_err_unmap: 612 { 613 struct asd_ascb *b = a; 614 list_for_each_entry(a, &alist, list) { 615 if (a == b) 616 break; 617 t = a->uldd_task; 618 spin_lock_irqsave(&t->task_state_lock, flags); 619 t->task_state_flags &= ~SAS_TASK_AT_INITIATOR; 620 spin_unlock_irqrestore(&t->task_state_lock, flags); 621 switch (t->task_proto) { 622 case SAS_PROTOCOL_SATA: 623 case SAS_PROTOCOL_STP: 624 asd_unbuild_ata_ascb(a); 625 break; 626 case SAS_PROTOCOL_SMP: 627 asd_unbuild_smp_ascb(a); 628 break; 629 case SAS_PROTOCOL_SSP: 630 asd_unbuild_ssp_ascb(a); 631 default: 632 break; 633 } 634 t->lldd_task = NULL; 635 } 636 } 637 list_del_init(&alist); 638out_err: 639 if (ascb) 640 asd_ascb_free_list(ascb); 641 asd_can_dequeue(asd_ha, num); 642 return res; 643} 644