1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Aic94xx SAS/SATA Tasks 4 * 5 * Copyright (C) 2005 Adaptec, Inc. All rights reserved. 6 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> 7 */ 8 9 #include <linux/spinlock.h> 10 #include "aic94xx.h" 11 #include "aic94xx_sas.h" 12 #include "aic94xx_hwi.h" 13 14 static void asd_unbuild_ata_ascb(struct asd_ascb *a); 15 static void asd_unbuild_smp_ascb(struct asd_ascb *a); 16 static void asd_unbuild_ssp_ascb(struct asd_ascb *a); 17 18 static void asd_can_dequeue(struct asd_ha_struct *asd_ha, int num) 19 { 20 unsigned long flags; 21 22 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); 23 asd_ha->seq.can_queue += num; 24 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); 25 } 26 27 /* DMA_... to our direction translation. 28 */ 29 static const u8 data_dir_flags[] = { 30 [DMA_BIDIRECTIONAL] = DATA_DIR_BYRECIPIENT, /* UNSPECIFIED */ 31 [DMA_TO_DEVICE] = DATA_DIR_OUT, /* OUTBOUND */ 32 [DMA_FROM_DEVICE] = DATA_DIR_IN, /* INBOUND */ 33 [DMA_NONE] = DATA_DIR_NONE, /* NO TRANSFER */ 34 }; 35 36 static int asd_map_scatterlist(struct sas_task *task, 37 struct sg_el *sg_arr, 38 gfp_t gfp_flags) 39 { 40 struct asd_ascb *ascb = task->lldd_task; 41 struct asd_ha_struct *asd_ha = ascb->ha; 42 struct scatterlist *sc; 43 int num_sg, res; 44 45 if (task->data_dir == DMA_NONE) 46 return 0; 47 48 if (task->num_scatter == 0) { 49 void *p = task->scatter; 50 dma_addr_t dma = dma_map_single(&asd_ha->pcidev->dev, p, 51 task->total_xfer_len, 52 task->data_dir); 53 if (dma_mapping_error(&asd_ha->pcidev->dev, dma)) 54 return -ENOMEM; 55 56 sg_arr[0].bus_addr = cpu_to_le64((u64)dma); 57 sg_arr[0].size = cpu_to_le32(task->total_xfer_len); 58 sg_arr[0].flags |= ASD_SG_EL_LIST_EOL; 59 return 0; 60 } 61 62 /* STP tasks come from libata which has already mapped 63 * the SG list */ 64 if (sas_protocol_ata(task->task_proto)) 65 num_sg = task->num_scatter; 66 else 67 num_sg = dma_map_sg(&asd_ha->pcidev->dev, task->scatter, 68 task->num_scatter, task->data_dir); 69 if (num_sg == 0) 70 return -ENOMEM; 71 72 if (num_sg > 3) { 73 int i; 74 75 ascb->sg_arr = asd_alloc_coherent(asd_ha, 76 num_sg*sizeof(struct sg_el), 77 gfp_flags); 78 if (!ascb->sg_arr) { 79 res = -ENOMEM; 80 goto err_unmap; 81 } 82 for_each_sg(task->scatter, sc, num_sg, i) { 83 struct sg_el *sg = 84 &((struct sg_el *)ascb->sg_arr->vaddr)[i]; 85 sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc)); 86 sg->size = cpu_to_le32((u32)sg_dma_len(sc)); 87 if (i == num_sg-1) 88 sg->flags |= ASD_SG_EL_LIST_EOL; 89 } 90 91 for_each_sg(task->scatter, sc, 2, i) { 92 sg_arr[i].bus_addr = 93 cpu_to_le64((u64)sg_dma_address(sc)); 94 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc)); 95 } 96 sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr); 97 sg_arr[1].flags |= ASD_SG_EL_LIST_EOS; 98 99 memset(&sg_arr[2], 0, sizeof(*sg_arr)); 100 sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle); 101 } else { 102 int i; 103 for_each_sg(task->scatter, sc, num_sg, i) { 104 sg_arr[i].bus_addr = 105 cpu_to_le64((u64)sg_dma_address(sc)); 106 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc)); 107 } 108 sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL; 109 } 110 111 return 0; 112 err_unmap: 113 if (sas_protocol_ata(task->task_proto)) 114 dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter, 115 task->num_scatter, task->data_dir); 116 return res; 117 } 118 119 static void asd_unmap_scatterlist(struct asd_ascb *ascb) 120 { 121 struct asd_ha_struct *asd_ha = ascb->ha; 122 struct sas_task *task = ascb->uldd_task; 123 124 if (task->data_dir == DMA_NONE) 125 return; 126 127 if (task->num_scatter == 0) { 128 dma_addr_t dma = (dma_addr_t) 129 le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr); 130 dma_unmap_single(&ascb->ha->pcidev->dev, dma, 131 task->total_xfer_len, task->data_dir); 132 return; 133 } 134 135 asd_free_coherent(asd_ha, ascb->sg_arr); 136 if (task->task_proto != SAS_PROTOCOL_STP) 137 dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter, 138 task->num_scatter, task->data_dir); 139 } 140 141 /* ---------- Task complete tasklet ---------- */ 142 143 static void asd_get_response_tasklet(struct asd_ascb *ascb, 144 struct done_list_struct *dl) 145 { 146 struct asd_ha_struct *asd_ha = ascb->ha; 147 struct sas_task *task = ascb->uldd_task; 148 struct task_status_struct *ts = &task->task_status; 149 unsigned long flags; 150 struct tc_resp_sb_struct { 151 __le16 index_escb; 152 u8 len_lsb; 153 u8 flags; 154 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block; 155 156 /* int size = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */ 157 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1; 158 struct asd_ascb *escb; 159 struct asd_dma_tok *edb; 160 void *r; 161 162 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags); 163 escb = asd_tc_index_find(&asd_ha->seq, 164 (int)le16_to_cpu(resp_sb->index_escb)); 165 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags); 166 167 if (!escb) { 168 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n"); 169 return; 170 } 171 172 ts->buf_valid_size = 0; 173 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index]; 174 r = edb->vaddr; 175 if (task->task_proto == SAS_PROTOCOL_SSP) { 176 struct ssp_response_iu *iu = 177 r + 16 + sizeof(struct ssp_frame_hdr); 178 179 ts->residual = le32_to_cpu(*(__le32 *)r); 180 181 sas_ssp_task_response(&asd_ha->pcidev->dev, task, iu); 182 } else { 183 struct ata_task_resp *resp = (void *) &ts->buf[0]; 184 185 ts->residual = le32_to_cpu(*(__le32 *)r); 186 187 if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) { 188 resp->frame_len = le16_to_cpu(*(__le16 *)(r+6)); 189 memcpy(&resp->ending_fis[0], r+16, ATA_RESP_FIS_SIZE); 190 ts->buf_valid_size = sizeof(*resp); 191 } 192 } 193 194 asd_invalidate_edb(escb, edb_id); 195 } 196 197 static void asd_task_tasklet_complete(struct asd_ascb *ascb, 198 struct done_list_struct *dl) 199 { 200 struct sas_task *task = ascb->uldd_task; 201 struct task_status_struct *ts = &task->task_status; 202 unsigned long flags; 203 u8 opcode = dl->opcode; 204 205 asd_can_dequeue(ascb->ha, 1); 206 207 Again: 208 switch (opcode) { 209 case TC_NO_ERROR: 210 ts->resp = SAS_TASK_COMPLETE; 211 ts->stat = SAS_SAM_STAT_GOOD; 212 break; 213 case TC_UNDERRUN: 214 ts->resp = SAS_TASK_COMPLETE; 215 ts->stat = SAS_DATA_UNDERRUN; 216 ts->residual = le32_to_cpu(*(__le32 *)dl->status_block); 217 break; 218 case TC_OVERRUN: 219 ts->resp = SAS_TASK_COMPLETE; 220 ts->stat = SAS_DATA_OVERRUN; 221 ts->residual = 0; 222 break; 223 case TC_SSP_RESP: 224 case TC_ATA_RESP: 225 ts->resp = SAS_TASK_COMPLETE; 226 ts->stat = SAS_PROTO_RESPONSE; 227 asd_get_response_tasklet(ascb, dl); 228 break; 229 case TF_OPEN_REJECT: 230 ts->resp = SAS_TASK_UNDELIVERED; 231 ts->stat = SAS_OPEN_REJECT; 232 if (dl->status_block[1] & 2) 233 ts->open_rej_reason = 1 + dl->status_block[2]; 234 else if (dl->status_block[1] & 1) 235 ts->open_rej_reason = (dl->status_block[2] >> 4)+10; 236 else 237 ts->open_rej_reason = SAS_OREJ_UNKNOWN; 238 break; 239 case TF_OPEN_TO: 240 ts->resp = SAS_TASK_UNDELIVERED; 241 ts->stat = SAS_OPEN_TO; 242 break; 243 case TF_PHY_DOWN: 244 case TU_PHY_DOWN: 245 ts->resp = SAS_TASK_UNDELIVERED; 246 ts->stat = SAS_PHY_DOWN; 247 break; 248 case TI_PHY_DOWN: 249 ts->resp = SAS_TASK_COMPLETE; 250 ts->stat = SAS_PHY_DOWN; 251 break; 252 case TI_BREAK: 253 case TI_PROTO_ERR: 254 case TI_NAK: 255 case TI_ACK_NAK_TO: 256 case TF_SMP_XMIT_RCV_ERR: 257 case TC_ATA_R_ERR_RECV: 258 ts->resp = SAS_TASK_COMPLETE; 259 ts->stat = SAS_INTERRUPTED; 260 break; 261 case TF_BREAK: 262 case TU_BREAK: 263 case TU_ACK_NAK_TO: 264 case TF_SMPRSP_TO: 265 ts->resp = SAS_TASK_UNDELIVERED; 266 ts->stat = SAS_DEV_NO_RESPONSE; 267 break; 268 case TF_NAK_RECV: 269 ts->resp = SAS_TASK_COMPLETE; 270 ts->stat = SAS_NAK_R_ERR; 271 break; 272 case TA_I_T_NEXUS_LOSS: 273 opcode = dl->status_block[0]; 274 goto Again; 275 case TF_INV_CONN_HANDLE: 276 ts->resp = SAS_TASK_UNDELIVERED; 277 ts->stat = SAS_DEVICE_UNKNOWN; 278 break; 279 case TF_REQUESTED_N_PENDING: 280 ts->resp = SAS_TASK_UNDELIVERED; 281 ts->stat = SAS_PENDING; 282 break; 283 case TC_TASK_CLEARED: 284 case TA_ON_REQ: 285 ts->resp = SAS_TASK_COMPLETE; 286 ts->stat = SAS_ABORTED_TASK; 287 break; 288 289 case TF_NO_SMP_CONN: 290 case TF_TMF_NO_CTX: 291 case TF_TMF_NO_TAG: 292 case TF_TMF_TAG_FREE: 293 case TF_TMF_TASK_DONE: 294 case TF_TMF_NO_CONN_HANDLE: 295 case TF_IRTT_TO: 296 case TF_IU_SHORT: 297 case TF_DATA_OFFS_ERR: 298 ts->resp = SAS_TASK_UNDELIVERED; 299 ts->stat = SAS_DEV_NO_RESPONSE; 300 break; 301 302 case TC_LINK_ADM_RESP: 303 case TC_CONTROL_PHY: 304 case TC_RESUME: 305 case TC_PARTIAL_SG_LIST: 306 default: 307 ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __func__, opcode); 308 break; 309 } 310 311 switch (task->task_proto) { 312 case SAS_PROTOCOL_SATA: 313 case SAS_PROTOCOL_STP: 314 asd_unbuild_ata_ascb(ascb); 315 break; 316 case SAS_PROTOCOL_SMP: 317 asd_unbuild_smp_ascb(ascb); 318 break; 319 case SAS_PROTOCOL_SSP: 320 asd_unbuild_ssp_ascb(ascb); 321 break; 322 default: 323 break; 324 } 325 326 spin_lock_irqsave(&task->task_state_lock, flags); 327 task->task_state_flags &= ~SAS_TASK_STATE_PENDING; 328 task->task_state_flags |= SAS_TASK_STATE_DONE; 329 if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) { 330 struct completion *completion = ascb->completion; 331 spin_unlock_irqrestore(&task->task_state_lock, flags); 332 ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x " 333 "stat 0x%x but aborted by upper layer!\n", 334 task, opcode, ts->resp, ts->stat); 335 if (completion) 336 complete(completion); 337 } else { 338 spin_unlock_irqrestore(&task->task_state_lock, flags); 339 task->lldd_task = NULL; 340 asd_ascb_free(ascb); 341 mb(); 342 task->task_done(task); 343 } 344 } 345 346 /* ---------- ATA ---------- */ 347 348 static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task, 349 gfp_t gfp_flags) 350 { 351 struct domain_device *dev = task->dev; 352 struct scb *scb; 353 u8 flags; 354 int res = 0; 355 356 scb = ascb->scb; 357 358 if (unlikely(task->ata_task.device_control_reg_update)) 359 scb->header.opcode = CONTROL_ATA_DEV; 360 else if (dev->sata_dev.class == ATA_DEV_ATAPI) 361 scb->header.opcode = INITIATE_ATAPI_TASK; 362 else 363 scb->header.opcode = INITIATE_ATA_TASK; 364 365 scb->ata_task.proto_conn_rate = (1 << 5); /* STP */ 366 if (dev->port->oob_mode == SAS_OOB_MODE) 367 scb->ata_task.proto_conn_rate |= dev->linkrate; 368 369 scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); 370 scb->ata_task.fis = task->ata_task.fis; 371 if (likely(!task->ata_task.device_control_reg_update)) 372 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */ 373 scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */ 374 if (dev->sata_dev.class == ATA_DEV_ATAPI) 375 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet, 376 16); 377 scb->ata_task.sister_scb = cpu_to_le16(0xFFFF); 378 scb->ata_task.conn_handle = cpu_to_le16( 379 (u16)(unsigned long)dev->lldd_dev); 380 381 if (likely(!task->ata_task.device_control_reg_update)) { 382 flags = 0; 383 if (task->ata_task.dma_xfer) 384 flags |= DATA_XFER_MODE_DMA; 385 if (task->ata_task.use_ncq && 386 dev->sata_dev.class != ATA_DEV_ATAPI) 387 flags |= ATA_Q_TYPE_NCQ; 388 flags |= data_dir_flags[task->data_dir]; 389 scb->ata_task.ata_flags = flags; 390 391 scb->ata_task.retry_count = task->ata_task.retry_count; 392 393 flags = 0; 394 if (task->ata_task.set_affil_pol) 395 flags |= SET_AFFIL_POLICY; 396 if (task->ata_task.stp_affil_pol) 397 flags |= STP_AFFIL_POLICY; 398 scb->ata_task.flags = flags; 399 } 400 ascb->tasklet_complete = asd_task_tasklet_complete; 401 402 if (likely(!task->ata_task.device_control_reg_update)) 403 res = asd_map_scatterlist(task, scb->ata_task.sg_element, 404 gfp_flags); 405 406 return res; 407 } 408 409 static void asd_unbuild_ata_ascb(struct asd_ascb *a) 410 { 411 asd_unmap_scatterlist(a); 412 } 413 414 /* ---------- SMP ---------- */ 415 416 static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task, 417 gfp_t gfp_flags) 418 { 419 struct asd_ha_struct *asd_ha = ascb->ha; 420 struct domain_device *dev = task->dev; 421 struct scb *scb; 422 423 dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_req, 1, 424 DMA_TO_DEVICE); 425 dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_resp, 1, 426 DMA_FROM_DEVICE); 427 428 scb = ascb->scb; 429 430 scb->header.opcode = INITIATE_SMP_TASK; 431 432 scb->smp_task.proto_conn_rate = dev->linkrate; 433 434 scb->smp_task.smp_req.bus_addr = 435 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req)); 436 scb->smp_task.smp_req.size = 437 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4); 438 439 scb->smp_task.smp_resp.bus_addr = 440 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp)); 441 scb->smp_task.smp_resp.size = 442 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4); 443 444 scb->smp_task.sister_scb = cpu_to_le16(0xFFFF); 445 scb->smp_task.conn_handle = cpu_to_le16((u16) 446 (unsigned long)dev->lldd_dev); 447 448 ascb->tasklet_complete = asd_task_tasklet_complete; 449 450 return 0; 451 } 452 453 static void asd_unbuild_smp_ascb(struct asd_ascb *a) 454 { 455 struct sas_task *task = a->uldd_task; 456 457 BUG_ON(!task); 458 dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_req, 1, 459 DMA_TO_DEVICE); 460 dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_resp, 1, 461 DMA_FROM_DEVICE); 462 } 463 464 /* ---------- SSP ---------- */ 465 466 static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task, 467 gfp_t gfp_flags) 468 { 469 struct domain_device *dev = task->dev; 470 struct scb *scb; 471 int res = 0; 472 473 scb = ascb->scb; 474 475 scb->header.opcode = INITIATE_SSP_TASK; 476 477 scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */ 478 scb->ssp_task.proto_conn_rate |= dev->linkrate; 479 scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); 480 scb->ssp_task.ssp_frame.frame_type = SSP_DATA; 481 memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr, 482 HASHED_SAS_ADDR_SIZE); 483 memcpy(scb->ssp_task.ssp_frame.hashed_src_addr, 484 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); 485 scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); 486 487 memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8); 488 if (task->ssp_task.enable_first_burst) 489 scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK; 490 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3); 491 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7); 492 memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cmd->cmnd, 493 task->ssp_task.cmd->cmd_len); 494 495 scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF); 496 scb->ssp_task.conn_handle = cpu_to_le16( 497 (u16)(unsigned long)dev->lldd_dev); 498 scb->ssp_task.data_dir = data_dir_flags[task->data_dir]; 499 scb->ssp_task.retry_count = scb->ssp_task.retry_count; 500 501 ascb->tasklet_complete = asd_task_tasklet_complete; 502 503 res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags); 504 505 return res; 506 } 507 508 static void asd_unbuild_ssp_ascb(struct asd_ascb *a) 509 { 510 asd_unmap_scatterlist(a); 511 } 512 513 /* ---------- Execute Task ---------- */ 514 515 static int asd_can_queue(struct asd_ha_struct *asd_ha, int num) 516 { 517 int res = 0; 518 unsigned long flags; 519 520 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); 521 if ((asd_ha->seq.can_queue - num) < 0) 522 res = -SAS_QUEUE_FULL; 523 else 524 asd_ha->seq.can_queue -= num; 525 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); 526 527 return res; 528 } 529 530 int asd_execute_task(struct sas_task *task, gfp_t gfp_flags) 531 { 532 int res = 0; 533 LIST_HEAD(alist); 534 struct sas_task *t = task; 535 struct asd_ascb *ascb = NULL, *a; 536 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; 537 538 res = asd_can_queue(asd_ha, 1); 539 if (res) 540 return res; 541 542 res = 1; 543 ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags); 544 if (res) { 545 res = -ENOMEM; 546 goto out_err; 547 } 548 549 __list_add(&alist, ascb->list.prev, &ascb->list); 550 list_for_each_entry(a, &alist, list) { 551 a->uldd_task = t; 552 t->lldd_task = a; 553 break; 554 } 555 list_for_each_entry(a, &alist, list) { 556 t = a->uldd_task; 557 a->uldd_timer = 1; 558 if (t->task_proto & SAS_PROTOCOL_STP) 559 t->task_proto = SAS_PROTOCOL_STP; 560 switch (t->task_proto) { 561 case SAS_PROTOCOL_SATA: 562 case SAS_PROTOCOL_STP: 563 res = asd_build_ata_ascb(a, t, gfp_flags); 564 break; 565 case SAS_PROTOCOL_SMP: 566 res = asd_build_smp_ascb(a, t, gfp_flags); 567 break; 568 case SAS_PROTOCOL_SSP: 569 res = asd_build_ssp_ascb(a, t, gfp_flags); 570 break; 571 default: 572 asd_printk("unknown sas_task proto: 0x%x\n", 573 t->task_proto); 574 res = -ENOMEM; 575 break; 576 } 577 if (res) 578 goto out_err_unmap; 579 } 580 list_del_init(&alist); 581 582 res = asd_post_ascb_list(asd_ha, ascb, 1); 583 if (unlikely(res)) { 584 a = NULL; 585 __list_add(&alist, ascb->list.prev, &ascb->list); 586 goto out_err_unmap; 587 } 588 589 return 0; 590 out_err_unmap: 591 { 592 struct asd_ascb *b = a; 593 list_for_each_entry(a, &alist, list) { 594 if (a == b) 595 break; 596 t = a->uldd_task; 597 switch (t->task_proto) { 598 case SAS_PROTOCOL_SATA: 599 case SAS_PROTOCOL_STP: 600 asd_unbuild_ata_ascb(a); 601 break; 602 case SAS_PROTOCOL_SMP: 603 asd_unbuild_smp_ascb(a); 604 break; 605 case SAS_PROTOCOL_SSP: 606 asd_unbuild_ssp_ascb(a); 607 break; 608 default: 609 break; 610 } 611 t->lldd_task = NULL; 612 } 613 } 614 list_del_init(&alist); 615 out_err: 616 if (ascb) 617 asd_ascb_free_list(ascb); 618 asd_can_dequeue(asd_ha, 1); 619 return res; 620 } 621