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 32 static void asd_unbuild_ata_ascb(struct asd_ascb *a); 33 static void asd_unbuild_smp_ascb(struct asd_ascb *a); 34 static void asd_unbuild_ssp_ascb(struct asd_ascb *a); 35 36 static inline 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 */ 47 static 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 54 static inline 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 (task->task_proto == SAS_PROTOCOL_STP) 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 (sc = task->scatter, i = 0; i < num_sg; i++, sc++) { 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 (sc = task->scatter, i = 0; i < 2; i++, sc++) { 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 (sc = task->scatter, i = 0; i < num_sg; i++, sc++) { 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; 127 err_unmap: 128 if (task->task_proto != SAS_PROTOCOL_STP) 129 pci_unmap_sg(asd_ha->pcidev, task->scatter, task->num_scatter, 130 task->data_dir); 131 return res; 132 } 133 134 static inline 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 ---------- */ 157 158 static 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_PROTO_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 ts->resp = SAS_TASK_COMPLETE; 196 if (iu->datapres == 0) 197 ts->stat = iu->status; 198 else if (iu->datapres == 1) 199 ts->stat = iu->resp_data[3]; 200 else if (iu->datapres == 2) { 201 ts->stat = SAM_CHECK_COND; 202 ts->buf_valid_size = min((u32) SAS_STATUS_BUF_SIZE, 203 be32_to_cpu(iu->sense_data_len)); 204 memcpy(ts->buf, iu->sense_data, ts->buf_valid_size); 205 if (iu->status != SAM_CHECK_COND) { 206 ASD_DPRINTK("device %llx sent sense data, but " 207 "stat(0x%x) is not CHECK_CONDITION" 208 "\n", 209 SAS_ADDR(task->dev->sas_addr), 210 ts->stat); 211 } 212 } 213 } else { 214 struct ata_task_resp *resp = (void *) &ts->buf[0]; 215 216 ts->residual = le32_to_cpu(*(__le32 *)r); 217 218 if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) { 219 resp->frame_len = le16_to_cpu(*(__le16 *)(r+6)); 220 memcpy(&resp->ending_fis[0], r+16, 24); 221 ts->buf_valid_size = sizeof(*resp); 222 } 223 } 224 225 asd_invalidate_edb(escb, edb_id); 226 } 227 228 static void asd_task_tasklet_complete(struct asd_ascb *ascb, 229 struct done_list_struct *dl) 230 { 231 struct sas_task *task = ascb->uldd_task; 232 struct task_status_struct *ts = &task->task_status; 233 unsigned long flags; 234 u8 opcode = dl->opcode; 235 236 asd_can_dequeue(ascb->ha, 1); 237 238 Again: 239 switch (opcode) { 240 case TC_NO_ERROR: 241 ts->resp = SAS_TASK_COMPLETE; 242 ts->stat = SAM_GOOD; 243 break; 244 case TC_UNDERRUN: 245 ts->resp = SAS_TASK_COMPLETE; 246 ts->stat = SAS_DATA_UNDERRUN; 247 ts->residual = le32_to_cpu(*(__le32 *)dl->status_block); 248 break; 249 case TC_OVERRUN: 250 ts->resp = SAS_TASK_COMPLETE; 251 ts->stat = SAS_DATA_OVERRUN; 252 ts->residual = 0; 253 break; 254 case TC_SSP_RESP: 255 case TC_ATA_RESP: 256 ts->resp = SAS_TASK_COMPLETE; 257 ts->stat = SAS_PROTO_RESPONSE; 258 asd_get_response_tasklet(ascb, dl); 259 break; 260 case TF_OPEN_REJECT: 261 ts->resp = SAS_TASK_UNDELIVERED; 262 ts->stat = SAS_OPEN_REJECT; 263 if (dl->status_block[1] & 2) 264 ts->open_rej_reason = 1 + dl->status_block[2]; 265 else if (dl->status_block[1] & 1) 266 ts->open_rej_reason = (dl->status_block[2] >> 4)+10; 267 else 268 ts->open_rej_reason = SAS_OREJ_UNKNOWN; 269 break; 270 case TF_OPEN_TO: 271 ts->resp = SAS_TASK_UNDELIVERED; 272 ts->stat = SAS_OPEN_TO; 273 break; 274 case TF_PHY_DOWN: 275 case TU_PHY_DOWN: 276 ts->resp = SAS_TASK_UNDELIVERED; 277 ts->stat = SAS_PHY_DOWN; 278 break; 279 case TI_PHY_DOWN: 280 ts->resp = SAS_TASK_COMPLETE; 281 ts->stat = SAS_PHY_DOWN; 282 break; 283 case TI_BREAK: 284 case TI_PROTO_ERR: 285 case TI_NAK: 286 case TI_ACK_NAK_TO: 287 case TF_SMP_XMIT_RCV_ERR: 288 case TC_ATA_R_ERR_RECV: 289 ts->resp = SAS_TASK_COMPLETE; 290 ts->stat = SAS_INTERRUPTED; 291 break; 292 case TF_BREAK: 293 case TU_BREAK: 294 case TU_ACK_NAK_TO: 295 case TF_SMPRSP_TO: 296 ts->resp = SAS_TASK_UNDELIVERED; 297 ts->stat = SAS_DEV_NO_RESPONSE; 298 break; 299 case TF_NAK_RECV: 300 ts->resp = SAS_TASK_COMPLETE; 301 ts->stat = SAS_NAK_R_ERR; 302 break; 303 case TA_I_T_NEXUS_LOSS: 304 opcode = dl->status_block[0]; 305 goto Again; 306 break; 307 case TF_INV_CONN_HANDLE: 308 ts->resp = SAS_TASK_UNDELIVERED; 309 ts->stat = SAS_DEVICE_UNKNOWN; 310 break; 311 case TF_REQUESTED_N_PENDING: 312 ts->resp = SAS_TASK_UNDELIVERED; 313 ts->stat = SAS_PENDING; 314 break; 315 case TC_TASK_CLEARED: 316 case TA_ON_REQ: 317 ts->resp = SAS_TASK_COMPLETE; 318 ts->stat = SAS_ABORTED_TASK; 319 break; 320 321 case TF_NO_SMP_CONN: 322 case TF_TMF_NO_CTX: 323 case TF_TMF_NO_TAG: 324 case TF_TMF_TAG_FREE: 325 case TF_TMF_TASK_DONE: 326 case TF_TMF_NO_CONN_HANDLE: 327 case TF_IRTT_TO: 328 case TF_IU_SHORT: 329 case TF_DATA_OFFS_ERR: 330 ts->resp = SAS_TASK_UNDELIVERED; 331 ts->stat = SAS_DEV_NO_RESPONSE; 332 break; 333 334 case TC_LINK_ADM_RESP: 335 case TC_CONTROL_PHY: 336 case TC_RESUME: 337 case TC_PARTIAL_SG_LIST: 338 default: 339 ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __FUNCTION__, opcode); 340 break; 341 } 342 343 switch (task->task_proto) { 344 case SATA_PROTO: 345 case SAS_PROTO_STP: 346 asd_unbuild_ata_ascb(ascb); 347 break; 348 case SAS_PROTO_SMP: 349 asd_unbuild_smp_ascb(ascb); 350 break; 351 case SAS_PROTO_SSP: 352 asd_unbuild_ssp_ascb(ascb); 353 default: 354 break; 355 } 356 357 spin_lock_irqsave(&task->task_state_lock, flags); 358 task->task_state_flags &= ~SAS_TASK_STATE_PENDING; 359 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; 360 task->task_state_flags |= SAS_TASK_STATE_DONE; 361 if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) { 362 spin_unlock_irqrestore(&task->task_state_lock, flags); 363 ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x " 364 "stat 0x%x but aborted by upper layer!\n", 365 task, opcode, ts->resp, ts->stat); 366 complete(&ascb->completion); 367 } else { 368 spin_unlock_irqrestore(&task->task_state_lock, flags); 369 task->lldd_task = NULL; 370 asd_ascb_free(ascb); 371 mb(); 372 task->task_done(task); 373 } 374 } 375 376 /* ---------- ATA ---------- */ 377 378 static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task, 379 gfp_t gfp_flags) 380 { 381 struct domain_device *dev = task->dev; 382 struct scb *scb; 383 u8 flags; 384 int res = 0; 385 386 scb = ascb->scb; 387 388 if (unlikely(task->ata_task.device_control_reg_update)) 389 scb->header.opcode = CONTROL_ATA_DEV; 390 else if (dev->sata_dev.command_set == ATA_COMMAND_SET) 391 scb->header.opcode = INITIATE_ATA_TASK; 392 else 393 scb->header.opcode = INITIATE_ATAPI_TASK; 394 395 scb->ata_task.proto_conn_rate = (1 << 5); /* STP */ 396 if (dev->port->oob_mode == SAS_OOB_MODE) 397 scb->ata_task.proto_conn_rate |= dev->linkrate; 398 399 scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); 400 scb->ata_task.fis = task->ata_task.fis; 401 if (likely(!task->ata_task.device_control_reg_update)) 402 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */ 403 scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */ 404 if (dev->sata_dev.command_set == ATAPI_COMMAND_SET) 405 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet, 406 16); 407 scb->ata_task.sister_scb = cpu_to_le16(0xFFFF); 408 scb->ata_task.conn_handle = cpu_to_le16( 409 (u16)(unsigned long)dev->lldd_dev); 410 411 if (likely(!task->ata_task.device_control_reg_update)) { 412 flags = 0; 413 if (task->ata_task.dma_xfer) 414 flags |= DATA_XFER_MODE_DMA; 415 if (task->ata_task.use_ncq && 416 dev->sata_dev.command_set != ATAPI_COMMAND_SET) 417 flags |= ATA_Q_TYPE_NCQ; 418 flags |= data_dir_flags[task->data_dir]; 419 scb->ata_task.ata_flags = flags; 420 421 scb->ata_task.retry_count = task->ata_task.retry_count; 422 423 flags = 0; 424 if (task->ata_task.set_affil_pol) 425 flags |= SET_AFFIL_POLICY; 426 if (task->ata_task.stp_affil_pol) 427 flags |= STP_AFFIL_POLICY; 428 scb->ata_task.flags = flags; 429 } 430 ascb->tasklet_complete = asd_task_tasklet_complete; 431 432 if (likely(!task->ata_task.device_control_reg_update)) 433 res = asd_map_scatterlist(task, scb->ata_task.sg_element, 434 gfp_flags); 435 436 return res; 437 } 438 439 static void asd_unbuild_ata_ascb(struct asd_ascb *a) 440 { 441 asd_unmap_scatterlist(a); 442 } 443 444 /* ---------- SMP ---------- */ 445 446 static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task, 447 gfp_t gfp_flags) 448 { 449 struct asd_ha_struct *asd_ha = ascb->ha; 450 struct domain_device *dev = task->dev; 451 struct scb *scb; 452 453 pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_req, 1, 454 PCI_DMA_FROMDEVICE); 455 pci_map_sg(asd_ha->pcidev, &task->smp_task.smp_resp, 1, 456 PCI_DMA_FROMDEVICE); 457 458 scb = ascb->scb; 459 460 scb->header.opcode = INITIATE_SMP_TASK; 461 462 scb->smp_task.proto_conn_rate = dev->linkrate; 463 464 scb->smp_task.smp_req.bus_addr = 465 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req)); 466 scb->smp_task.smp_req.size = 467 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4); 468 469 scb->smp_task.smp_resp.bus_addr = 470 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp)); 471 scb->smp_task.smp_resp.size = 472 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4); 473 474 scb->smp_task.sister_scb = cpu_to_le16(0xFFFF); 475 scb->smp_task.conn_handle = cpu_to_le16((u16) 476 (unsigned long)dev->lldd_dev); 477 478 ascb->tasklet_complete = asd_task_tasklet_complete; 479 480 return 0; 481 } 482 483 static void asd_unbuild_smp_ascb(struct asd_ascb *a) 484 { 485 struct sas_task *task = a->uldd_task; 486 487 BUG_ON(!task); 488 pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_req, 1, 489 PCI_DMA_FROMDEVICE); 490 pci_unmap_sg(a->ha->pcidev, &task->smp_task.smp_resp, 1, 491 PCI_DMA_FROMDEVICE); 492 } 493 494 /* ---------- SSP ---------- */ 495 496 static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task, 497 gfp_t gfp_flags) 498 { 499 struct domain_device *dev = task->dev; 500 struct scb *scb; 501 int res = 0; 502 503 scb = ascb->scb; 504 505 scb->header.opcode = INITIATE_SSP_TASK; 506 507 scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */ 508 scb->ssp_task.proto_conn_rate |= dev->linkrate; 509 scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len); 510 scb->ssp_task.ssp_frame.frame_type = SSP_DATA; 511 memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr, 512 HASHED_SAS_ADDR_SIZE); 513 memcpy(scb->ssp_task.ssp_frame.hashed_src_addr, 514 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); 515 scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); 516 517 memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8); 518 if (task->ssp_task.enable_first_burst) 519 scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK; 520 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3); 521 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7); 522 memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cdb, 16); 523 524 scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF); 525 scb->ssp_task.conn_handle = cpu_to_le16( 526 (u16)(unsigned long)dev->lldd_dev); 527 scb->ssp_task.data_dir = data_dir_flags[task->data_dir]; 528 scb->ssp_task.retry_count = scb->ssp_task.retry_count; 529 530 ascb->tasklet_complete = asd_task_tasklet_complete; 531 532 res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags); 533 534 return res; 535 } 536 537 static void asd_unbuild_ssp_ascb(struct asd_ascb *a) 538 { 539 asd_unmap_scatterlist(a); 540 } 541 542 /* ---------- Execute Task ---------- */ 543 544 static inline int asd_can_queue(struct asd_ha_struct *asd_ha, int num) 545 { 546 int res = 0; 547 unsigned long flags; 548 549 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags); 550 if ((asd_ha->seq.can_queue - num) < 0) 551 res = -SAS_QUEUE_FULL; 552 else 553 asd_ha->seq.can_queue -= num; 554 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags); 555 556 return res; 557 } 558 559 int asd_execute_task(struct sas_task *task, const int num, 560 gfp_t gfp_flags) 561 { 562 int res = 0; 563 LIST_HEAD(alist); 564 struct sas_task *t = task; 565 struct asd_ascb *ascb = NULL, *a; 566 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; 567 unsigned long flags; 568 569 res = asd_can_queue(asd_ha, num); 570 if (res) 571 return res; 572 573 res = num; 574 ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags); 575 if (res) { 576 res = -ENOMEM; 577 goto out_err; 578 } 579 580 __list_add(&alist, ascb->list.prev, &ascb->list); 581 list_for_each_entry(a, &alist, list) { 582 a->uldd_task = t; 583 t->lldd_task = a; 584 t = list_entry(t->list.next, struct sas_task, list); 585 } 586 list_for_each_entry(a, &alist, list) { 587 t = a->uldd_task; 588 a->uldd_timer = 1; 589 if (t->task_proto & SAS_PROTO_STP) 590 t->task_proto = SAS_PROTO_STP; 591 switch (t->task_proto) { 592 case SATA_PROTO: 593 case SAS_PROTO_STP: 594 res = asd_build_ata_ascb(a, t, gfp_flags); 595 break; 596 case SAS_PROTO_SMP: 597 res = asd_build_smp_ascb(a, t, gfp_flags); 598 break; 599 case SAS_PROTO_SSP: 600 res = asd_build_ssp_ascb(a, t, gfp_flags); 601 break; 602 default: 603 asd_printk("unknown sas_task proto: 0x%x\n", 604 t->task_proto); 605 res = -ENOMEM; 606 break; 607 } 608 if (res) 609 goto out_err_unmap; 610 611 spin_lock_irqsave(&t->task_state_lock, flags); 612 t->task_state_flags |= SAS_TASK_AT_INITIATOR; 613 spin_unlock_irqrestore(&t->task_state_lock, flags); 614 } 615 list_del_init(&alist); 616 617 res = asd_post_ascb_list(asd_ha, ascb, num); 618 if (unlikely(res)) { 619 a = NULL; 620 __list_add(&alist, ascb->list.prev, &ascb->list); 621 goto out_err_unmap; 622 } 623 624 return 0; 625 out_err_unmap: 626 { 627 struct asd_ascb *b = a; 628 list_for_each_entry(a, &alist, list) { 629 if (a == b) 630 break; 631 t = a->uldd_task; 632 spin_lock_irqsave(&t->task_state_lock, flags); 633 t->task_state_flags &= ~SAS_TASK_AT_INITIATOR; 634 spin_unlock_irqrestore(&t->task_state_lock, flags); 635 switch (t->task_proto) { 636 case SATA_PROTO: 637 case SAS_PROTO_STP: 638 asd_unbuild_ata_ascb(a); 639 break; 640 case SAS_PROTO_SMP: 641 asd_unbuild_smp_ascb(a); 642 break; 643 case SAS_PROTO_SSP: 644 asd_unbuild_ssp_ascb(a); 645 default: 646 break; 647 } 648 t->lldd_task = NULL; 649 } 650 } 651 list_del_init(&alist); 652 out_err: 653 if (ascb) 654 asd_ascb_free_list(ascb); 655 asd_can_dequeue(asd_ha, num); 656 return res; 657 } 658