1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2022 Qualcomm Innovation Center. All rights reserved. 4 * 5 * Authors: 6 * Asutosh Das <quic_asutoshd@quicinc.com> 7 * Can Guo <quic_cang@quicinc.com> 8 */ 9 10 #include <asm/unaligned.h> 11 #include <linux/dma-mapping.h> 12 #include <linux/module.h> 13 #include <linux/platform_device.h> 14 #include "ufshcd-priv.h" 15 #include <linux/delay.h> 16 #include <scsi/scsi_cmnd.h> 17 #include <linux/bitfield.h> 18 #include <linux/iopoll.h> 19 20 #define MAX_QUEUE_SUP GENMASK(7, 0) 21 #define UFS_MCQ_MIN_RW_QUEUES 2 22 #define UFS_MCQ_MIN_READ_QUEUES 0 23 #define UFS_MCQ_MIN_POLL_QUEUES 0 24 #define QUEUE_EN_OFFSET 31 25 #define QUEUE_ID_OFFSET 16 26 27 #define MCQ_CFG_MAC_MASK GENMASK(16, 8) 28 #define MCQ_QCFG_SIZE 0x40 29 #define MCQ_ENTRY_SIZE_IN_DWORD 8 30 #define CQE_UCD_BA GENMASK_ULL(63, 7) 31 32 /* Max mcq register polling time in microseconds */ 33 #define MCQ_POLL_US 500000 34 35 static int rw_queue_count_set(const char *val, const struct kernel_param *kp) 36 { 37 return param_set_uint_minmax(val, kp, UFS_MCQ_MIN_RW_QUEUES, 38 num_possible_cpus()); 39 } 40 41 static const struct kernel_param_ops rw_queue_count_ops = { 42 .set = rw_queue_count_set, 43 .get = param_get_uint, 44 }; 45 46 static unsigned int rw_queues; 47 module_param_cb(rw_queues, &rw_queue_count_ops, &rw_queues, 0644); 48 MODULE_PARM_DESC(rw_queues, 49 "Number of interrupt driven I/O queues used for rw. Default value is nr_cpus"); 50 51 static int read_queue_count_set(const char *val, const struct kernel_param *kp) 52 { 53 return param_set_uint_minmax(val, kp, UFS_MCQ_MIN_READ_QUEUES, 54 num_possible_cpus()); 55 } 56 57 static const struct kernel_param_ops read_queue_count_ops = { 58 .set = read_queue_count_set, 59 .get = param_get_uint, 60 }; 61 62 static unsigned int read_queues; 63 module_param_cb(read_queues, &read_queue_count_ops, &read_queues, 0644); 64 MODULE_PARM_DESC(read_queues, 65 "Number of interrupt driven read queues used for read. Default value is 0"); 66 67 static int poll_queue_count_set(const char *val, const struct kernel_param *kp) 68 { 69 return param_set_uint_minmax(val, kp, UFS_MCQ_MIN_POLL_QUEUES, 70 num_possible_cpus()); 71 } 72 73 static const struct kernel_param_ops poll_queue_count_ops = { 74 .set = poll_queue_count_set, 75 .get = param_get_uint, 76 }; 77 78 static unsigned int poll_queues = 1; 79 module_param_cb(poll_queues, &poll_queue_count_ops, &poll_queues, 0644); 80 MODULE_PARM_DESC(poll_queues, 81 "Number of poll queues used for r/w. Default value is 1"); 82 83 /** 84 * ufshcd_mcq_config_mac - Set the #Max Activ Cmds. 85 * @hba: per adapter instance 86 * @max_active_cmds: maximum # of active commands to the device at any time. 87 * 88 * The controller won't send more than the max_active_cmds to the device at 89 * any time. 90 */ 91 void ufshcd_mcq_config_mac(struct ufs_hba *hba, u32 max_active_cmds) 92 { 93 u32 val; 94 95 val = ufshcd_readl(hba, REG_UFS_MCQ_CFG); 96 val &= ~MCQ_CFG_MAC_MASK; 97 val |= FIELD_PREP(MCQ_CFG_MAC_MASK, max_active_cmds - 1); 98 ufshcd_writel(hba, val, REG_UFS_MCQ_CFG); 99 } 100 EXPORT_SYMBOL_GPL(ufshcd_mcq_config_mac); 101 102 /** 103 * ufshcd_mcq_req_to_hwq - find the hardware queue on which the 104 * request would be issued. 105 * @hba: per adapter instance 106 * @req: pointer to the request to be issued 107 * 108 * Return: the hardware queue instance on which the request will be or has 109 * been queued. %NULL if the request has already been freed. 110 */ 111 struct ufs_hw_queue *ufshcd_mcq_req_to_hwq(struct ufs_hba *hba, 112 struct request *req) 113 { 114 struct blk_mq_hw_ctx *hctx = READ_ONCE(req->mq_hctx); 115 116 return hctx ? &hba->uhq[hctx->queue_num] : NULL; 117 } 118 119 /** 120 * ufshcd_mcq_decide_queue_depth - decide the queue depth 121 * @hba: per adapter instance 122 * 123 * Return: queue-depth on success, non-zero on error 124 * 125 * MAC - Max. Active Command of the Host Controller (HC) 126 * HC wouldn't send more than this commands to the device. 127 * It is mandatory to implement get_hba_mac() to enable MCQ mode. 128 * Calculates and adjusts the queue depth based on the depth 129 * supported by the HC and ufs device. 130 */ 131 int ufshcd_mcq_decide_queue_depth(struct ufs_hba *hba) 132 { 133 int mac; 134 135 /* Mandatory to implement get_hba_mac() */ 136 mac = ufshcd_mcq_vops_get_hba_mac(hba); 137 if (mac < 0) { 138 dev_err(hba->dev, "Failed to get mac, err=%d\n", mac); 139 return mac; 140 } 141 142 WARN_ON_ONCE(!hba->dev_info.bqueuedepth); 143 /* 144 * max. value of bqueuedepth = 256, mac is host dependent. 145 * It is mandatory for UFS device to define bQueueDepth if 146 * shared queuing architecture is enabled. 147 */ 148 return min_t(int, mac, hba->dev_info.bqueuedepth); 149 } 150 151 static int ufshcd_mcq_config_nr_queues(struct ufs_hba *hba) 152 { 153 int i; 154 u32 hba_maxq, rem, tot_queues; 155 struct Scsi_Host *host = hba->host; 156 157 /* maxq is 0 based value */ 158 hba_maxq = FIELD_GET(MAX_QUEUE_SUP, hba->mcq_capabilities) + 1; 159 160 tot_queues = read_queues + poll_queues + rw_queues; 161 162 if (hba_maxq < tot_queues) { 163 dev_err(hba->dev, "Total queues (%d) exceeds HC capacity (%d)\n", 164 tot_queues, hba_maxq); 165 return -EOPNOTSUPP; 166 } 167 168 rem = hba_maxq; 169 170 if (rw_queues) { 171 hba->nr_queues[HCTX_TYPE_DEFAULT] = rw_queues; 172 rem -= hba->nr_queues[HCTX_TYPE_DEFAULT]; 173 } else { 174 rw_queues = num_possible_cpus(); 175 } 176 177 if (poll_queues) { 178 hba->nr_queues[HCTX_TYPE_POLL] = poll_queues; 179 rem -= hba->nr_queues[HCTX_TYPE_POLL]; 180 } 181 182 if (read_queues) { 183 hba->nr_queues[HCTX_TYPE_READ] = read_queues; 184 rem -= hba->nr_queues[HCTX_TYPE_READ]; 185 } 186 187 if (!hba->nr_queues[HCTX_TYPE_DEFAULT]) 188 hba->nr_queues[HCTX_TYPE_DEFAULT] = min3(rem, rw_queues, 189 num_possible_cpus()); 190 191 for (i = 0; i < HCTX_MAX_TYPES; i++) 192 host->nr_hw_queues += hba->nr_queues[i]; 193 194 hba->nr_hw_queues = host->nr_hw_queues; 195 return 0; 196 } 197 198 int ufshcd_mcq_memory_alloc(struct ufs_hba *hba) 199 { 200 struct ufs_hw_queue *hwq; 201 size_t utrdl_size, cqe_size; 202 int i; 203 204 for (i = 0; i < hba->nr_hw_queues; i++) { 205 hwq = &hba->uhq[i]; 206 207 utrdl_size = sizeof(struct utp_transfer_req_desc) * 208 hwq->max_entries; 209 hwq->sqe_base_addr = dmam_alloc_coherent(hba->dev, utrdl_size, 210 &hwq->sqe_dma_addr, 211 GFP_KERNEL); 212 if (!hwq->sqe_dma_addr) { 213 dev_err(hba->dev, "SQE allocation failed\n"); 214 return -ENOMEM; 215 } 216 217 cqe_size = sizeof(struct cq_entry) * hwq->max_entries; 218 hwq->cqe_base_addr = dmam_alloc_coherent(hba->dev, cqe_size, 219 &hwq->cqe_dma_addr, 220 GFP_KERNEL); 221 if (!hwq->cqe_dma_addr) { 222 dev_err(hba->dev, "CQE allocation failed\n"); 223 return -ENOMEM; 224 } 225 } 226 227 return 0; 228 } 229 230 231 /* Operation and runtime registers configuration */ 232 #define MCQ_CFG_n(r, i) ((r) + MCQ_QCFG_SIZE * (i)) 233 234 static void __iomem *mcq_opr_base(struct ufs_hba *hba, 235 enum ufshcd_mcq_opr n, int i) 236 { 237 struct ufshcd_mcq_opr_info_t *opr = &hba->mcq_opr[n]; 238 239 return opr->base + opr->stride * i; 240 } 241 242 u32 ufshcd_mcq_read_cqis(struct ufs_hba *hba, int i) 243 { 244 return readl(mcq_opr_base(hba, OPR_CQIS, i) + REG_CQIS); 245 } 246 EXPORT_SYMBOL_GPL(ufshcd_mcq_read_cqis); 247 248 void ufshcd_mcq_write_cqis(struct ufs_hba *hba, u32 val, int i) 249 { 250 writel(val, mcq_opr_base(hba, OPR_CQIS, i) + REG_CQIS); 251 } 252 EXPORT_SYMBOL_GPL(ufshcd_mcq_write_cqis); 253 254 /* 255 * Current MCQ specification doesn't provide a Task Tag or its equivalent in 256 * the Completion Queue Entry. Find the Task Tag using an indirect method. 257 */ 258 static int ufshcd_mcq_get_tag(struct ufs_hba *hba, 259 struct ufs_hw_queue *hwq, 260 struct cq_entry *cqe) 261 { 262 u64 addr; 263 264 /* sizeof(struct utp_transfer_cmd_desc) must be a multiple of 128 */ 265 BUILD_BUG_ON(sizeof(struct utp_transfer_cmd_desc) & GENMASK(6, 0)); 266 267 /* Bits 63:7 UCD base address, 6:5 are reserved, 4:0 is SQ ID */ 268 addr = (le64_to_cpu(cqe->command_desc_base_addr) & CQE_UCD_BA) - 269 hba->ucdl_dma_addr; 270 271 return div_u64(addr, ufshcd_get_ucd_size(hba)); 272 } 273 274 static void ufshcd_mcq_process_cqe(struct ufs_hba *hba, 275 struct ufs_hw_queue *hwq) 276 { 277 struct cq_entry *cqe = ufshcd_mcq_cur_cqe(hwq); 278 int tag = ufshcd_mcq_get_tag(hba, hwq, cqe); 279 280 if (cqe->command_desc_base_addr) { 281 ufshcd_compl_one_cqe(hba, tag, cqe); 282 /* After processed the cqe, mark it empty (invalid) entry */ 283 cqe->command_desc_base_addr = 0; 284 } 285 } 286 287 void ufshcd_mcq_compl_all_cqes_lock(struct ufs_hba *hba, 288 struct ufs_hw_queue *hwq) 289 { 290 unsigned long flags; 291 u32 entries = hwq->max_entries; 292 293 spin_lock_irqsave(&hwq->cq_lock, flags); 294 while (entries > 0) { 295 ufshcd_mcq_process_cqe(hba, hwq); 296 ufshcd_mcq_inc_cq_head_slot(hwq); 297 entries--; 298 } 299 300 ufshcd_mcq_update_cq_tail_slot(hwq); 301 hwq->cq_head_slot = hwq->cq_tail_slot; 302 spin_unlock_irqrestore(&hwq->cq_lock, flags); 303 } 304 305 unsigned long ufshcd_mcq_poll_cqe_lock(struct ufs_hba *hba, 306 struct ufs_hw_queue *hwq) 307 { 308 unsigned long completed_reqs = 0; 309 unsigned long flags; 310 311 spin_lock_irqsave(&hwq->cq_lock, flags); 312 ufshcd_mcq_update_cq_tail_slot(hwq); 313 while (!ufshcd_mcq_is_cq_empty(hwq)) { 314 ufshcd_mcq_process_cqe(hba, hwq); 315 ufshcd_mcq_inc_cq_head_slot(hwq); 316 completed_reqs++; 317 } 318 319 if (completed_reqs) 320 ufshcd_mcq_update_cq_head(hwq); 321 spin_unlock_irqrestore(&hwq->cq_lock, flags); 322 323 return completed_reqs; 324 } 325 EXPORT_SYMBOL_GPL(ufshcd_mcq_poll_cqe_lock); 326 327 void ufshcd_mcq_make_queues_operational(struct ufs_hba *hba) 328 { 329 struct ufs_hw_queue *hwq; 330 u16 qsize; 331 int i; 332 333 for (i = 0; i < hba->nr_hw_queues; i++) { 334 hwq = &hba->uhq[i]; 335 hwq->id = i; 336 qsize = hwq->max_entries * MCQ_ENTRY_SIZE_IN_DWORD - 1; 337 338 /* Submission Queue Lower Base Address */ 339 ufsmcq_writelx(hba, lower_32_bits(hwq->sqe_dma_addr), 340 MCQ_CFG_n(REG_SQLBA, i)); 341 /* Submission Queue Upper Base Address */ 342 ufsmcq_writelx(hba, upper_32_bits(hwq->sqe_dma_addr), 343 MCQ_CFG_n(REG_SQUBA, i)); 344 /* Submission Queue Doorbell Address Offset */ 345 ufsmcq_writelx(hba, ufshcd_mcq_opr_offset(hba, OPR_SQD, i), 346 MCQ_CFG_n(REG_SQDAO, i)); 347 /* Submission Queue Interrupt Status Address Offset */ 348 ufsmcq_writelx(hba, ufshcd_mcq_opr_offset(hba, OPR_SQIS, i), 349 MCQ_CFG_n(REG_SQISAO, i)); 350 351 /* Completion Queue Lower Base Address */ 352 ufsmcq_writelx(hba, lower_32_bits(hwq->cqe_dma_addr), 353 MCQ_CFG_n(REG_CQLBA, i)); 354 /* Completion Queue Upper Base Address */ 355 ufsmcq_writelx(hba, upper_32_bits(hwq->cqe_dma_addr), 356 MCQ_CFG_n(REG_CQUBA, i)); 357 /* Completion Queue Doorbell Address Offset */ 358 ufsmcq_writelx(hba, ufshcd_mcq_opr_offset(hba, OPR_CQD, i), 359 MCQ_CFG_n(REG_CQDAO, i)); 360 /* Completion Queue Interrupt Status Address Offset */ 361 ufsmcq_writelx(hba, ufshcd_mcq_opr_offset(hba, OPR_CQIS, i), 362 MCQ_CFG_n(REG_CQISAO, i)); 363 364 /* Save the base addresses for quicker access */ 365 hwq->mcq_sq_head = mcq_opr_base(hba, OPR_SQD, i) + REG_SQHP; 366 hwq->mcq_sq_tail = mcq_opr_base(hba, OPR_SQD, i) + REG_SQTP; 367 hwq->mcq_cq_head = mcq_opr_base(hba, OPR_CQD, i) + REG_CQHP; 368 hwq->mcq_cq_tail = mcq_opr_base(hba, OPR_CQD, i) + REG_CQTP; 369 370 /* Reinitializing is needed upon HC reset */ 371 hwq->sq_tail_slot = hwq->cq_tail_slot = hwq->cq_head_slot = 0; 372 373 /* Enable Tail Entry Push Status interrupt only for non-poll queues */ 374 if (i < hba->nr_hw_queues - hba->nr_queues[HCTX_TYPE_POLL]) 375 writel(1, mcq_opr_base(hba, OPR_CQIS, i) + REG_CQIE); 376 377 /* Completion Queue Enable|Size to Completion Queue Attribute */ 378 ufsmcq_writel(hba, (1 << QUEUE_EN_OFFSET) | qsize, 379 MCQ_CFG_n(REG_CQATTR, i)); 380 381 /* 382 * Submission Qeueue Enable|Size|Completion Queue ID to 383 * Submission Queue Attribute 384 */ 385 ufsmcq_writel(hba, (1 << QUEUE_EN_OFFSET) | qsize | 386 (i << QUEUE_ID_OFFSET), 387 MCQ_CFG_n(REG_SQATTR, i)); 388 } 389 } 390 EXPORT_SYMBOL_GPL(ufshcd_mcq_make_queues_operational); 391 392 void ufshcd_mcq_enable_esi(struct ufs_hba *hba) 393 { 394 ufshcd_writel(hba, ufshcd_readl(hba, REG_UFS_MEM_CFG) | 0x2, 395 REG_UFS_MEM_CFG); 396 } 397 EXPORT_SYMBOL_GPL(ufshcd_mcq_enable_esi); 398 399 void ufshcd_mcq_config_esi(struct ufs_hba *hba, struct msi_msg *msg) 400 { 401 ufshcd_writel(hba, msg->address_lo, REG_UFS_ESILBA); 402 ufshcd_writel(hba, msg->address_hi, REG_UFS_ESIUBA); 403 } 404 EXPORT_SYMBOL_GPL(ufshcd_mcq_config_esi); 405 406 int ufshcd_mcq_init(struct ufs_hba *hba) 407 { 408 struct Scsi_Host *host = hba->host; 409 struct ufs_hw_queue *hwq; 410 int ret, i; 411 412 ret = ufshcd_mcq_config_nr_queues(hba); 413 if (ret) 414 return ret; 415 416 ret = ufshcd_vops_mcq_config_resource(hba); 417 if (ret) 418 return ret; 419 420 ret = ufshcd_mcq_vops_op_runtime_config(hba); 421 if (ret) { 422 dev_err(hba->dev, "Operation runtime config failed, ret=%d\n", 423 ret); 424 return ret; 425 } 426 hba->uhq = devm_kzalloc(hba->dev, 427 hba->nr_hw_queues * sizeof(struct ufs_hw_queue), 428 GFP_KERNEL); 429 if (!hba->uhq) { 430 dev_err(hba->dev, "ufs hw queue memory allocation failed\n"); 431 return -ENOMEM; 432 } 433 434 for (i = 0; i < hba->nr_hw_queues; i++) { 435 hwq = &hba->uhq[i]; 436 hwq->max_entries = hba->nutrs + 1; 437 spin_lock_init(&hwq->sq_lock); 438 spin_lock_init(&hwq->cq_lock); 439 mutex_init(&hwq->sq_mutex); 440 } 441 442 /* The very first HW queue serves device commands */ 443 hba->dev_cmd_queue = &hba->uhq[0]; 444 445 host->host_tagset = 1; 446 return 0; 447 } 448 449 static int ufshcd_mcq_sq_stop(struct ufs_hba *hba, struct ufs_hw_queue *hwq) 450 { 451 void __iomem *reg; 452 u32 id = hwq->id, val; 453 int err; 454 455 if (hba->quirks & UFSHCD_QUIRK_MCQ_BROKEN_RTC) 456 return -ETIMEDOUT; 457 458 writel(SQ_STOP, mcq_opr_base(hba, OPR_SQD, id) + REG_SQRTC); 459 reg = mcq_opr_base(hba, OPR_SQD, id) + REG_SQRTS; 460 err = read_poll_timeout(readl, val, val & SQ_STS, 20, 461 MCQ_POLL_US, false, reg); 462 if (err) 463 dev_err(hba->dev, "%s: failed. hwq-id=%d, err=%d\n", 464 __func__, id, err); 465 return err; 466 } 467 468 static int ufshcd_mcq_sq_start(struct ufs_hba *hba, struct ufs_hw_queue *hwq) 469 { 470 void __iomem *reg; 471 u32 id = hwq->id, val; 472 int err; 473 474 if (hba->quirks & UFSHCD_QUIRK_MCQ_BROKEN_RTC) 475 return -ETIMEDOUT; 476 477 writel(SQ_START, mcq_opr_base(hba, OPR_SQD, id) + REG_SQRTC); 478 reg = mcq_opr_base(hba, OPR_SQD, id) + REG_SQRTS; 479 err = read_poll_timeout(readl, val, !(val & SQ_STS), 20, 480 MCQ_POLL_US, false, reg); 481 if (err) 482 dev_err(hba->dev, "%s: failed. hwq-id=%d, err=%d\n", 483 __func__, id, err); 484 return err; 485 } 486 487 /** 488 * ufshcd_mcq_sq_cleanup - Clean up submission queue resources 489 * associated with the pending command. 490 * @hba: per adapter instance. 491 * @task_tag: The command's task tag. 492 * 493 * Return: 0 for success; error code otherwise. 494 */ 495 int ufshcd_mcq_sq_cleanup(struct ufs_hba *hba, int task_tag) 496 { 497 struct ufshcd_lrb *lrbp = &hba->lrb[task_tag]; 498 struct scsi_cmnd *cmd = lrbp->cmd; 499 struct ufs_hw_queue *hwq; 500 void __iomem *reg, *opr_sqd_base; 501 u32 nexus, id, val, rtc; 502 int err; 503 504 if (hba->quirks & UFSHCD_QUIRK_MCQ_BROKEN_RTC) 505 return -ETIMEDOUT; 506 507 if (task_tag != hba->nutrs - UFSHCD_NUM_RESERVED) { 508 if (!cmd) 509 return -EINVAL; 510 hwq = ufshcd_mcq_req_to_hwq(hba, scsi_cmd_to_rq(cmd)); 511 if (!hwq) 512 return 0; 513 } else { 514 hwq = hba->dev_cmd_queue; 515 } 516 517 id = hwq->id; 518 519 mutex_lock(&hwq->sq_mutex); 520 521 /* stop the SQ fetching before working on it */ 522 err = ufshcd_mcq_sq_stop(hba, hwq); 523 if (err) 524 goto unlock; 525 526 /* SQCTI = EXT_IID, IID, LUN, Task Tag */ 527 nexus = lrbp->lun << 8 | task_tag; 528 opr_sqd_base = mcq_opr_base(hba, OPR_SQD, id); 529 writel(nexus, opr_sqd_base + REG_SQCTI); 530 531 /* Initiate Cleanup */ 532 writel(readl(opr_sqd_base + REG_SQRTC) | SQ_ICU, 533 opr_sqd_base + REG_SQRTC); 534 535 /* Poll SQRTSy.CUS = 1. Return result from SQRTSy.RTC */ 536 reg = opr_sqd_base + REG_SQRTS; 537 err = read_poll_timeout(readl, val, val & SQ_CUS, 20, 538 MCQ_POLL_US, false, reg); 539 rtc = FIELD_GET(SQ_ICU_ERR_CODE_MASK, readl(reg)); 540 if (err || rtc) 541 dev_err(hba->dev, "%s: failed. hwq=%d, tag=%d err=%d RTC=%d\n", 542 __func__, id, task_tag, err, rtc); 543 544 if (ufshcd_mcq_sq_start(hba, hwq)) 545 err = -ETIMEDOUT; 546 547 unlock: 548 mutex_unlock(&hwq->sq_mutex); 549 return err; 550 } 551 552 /** 553 * ufshcd_mcq_nullify_sqe - Nullify the submission queue entry. 554 * Write the sqe's Command Type to 0xF. The host controller will not 555 * fetch any sqe with Command Type = 0xF. 556 * 557 * @utrd: UTP Transfer Request Descriptor to be nullified. 558 */ 559 static void ufshcd_mcq_nullify_sqe(struct utp_transfer_req_desc *utrd) 560 { 561 utrd->header.command_type = 0xf; 562 } 563 564 /** 565 * ufshcd_mcq_sqe_search - Search for the command in the submission queue 566 * If the command is in the submission queue and not issued to the device yet, 567 * nullify the sqe so the host controller will skip fetching the sqe. 568 * 569 * @hba: per adapter instance. 570 * @hwq: Hardware Queue to be searched. 571 * @task_tag: The command's task tag. 572 * 573 * Return: true if the SQE containing the command is present in the SQ 574 * (not fetched by the controller); returns false if the SQE is not in the SQ. 575 */ 576 static bool ufshcd_mcq_sqe_search(struct ufs_hba *hba, 577 struct ufs_hw_queue *hwq, int task_tag) 578 { 579 struct ufshcd_lrb *lrbp = &hba->lrb[task_tag]; 580 struct utp_transfer_req_desc *utrd; 581 __le64 cmd_desc_base_addr; 582 bool ret = false; 583 u64 addr, match; 584 u32 sq_head_slot; 585 586 if (hba->quirks & UFSHCD_QUIRK_MCQ_BROKEN_RTC) 587 return true; 588 589 mutex_lock(&hwq->sq_mutex); 590 591 ufshcd_mcq_sq_stop(hba, hwq); 592 sq_head_slot = ufshcd_mcq_get_sq_head_slot(hwq); 593 if (sq_head_slot == hwq->sq_tail_slot) 594 goto out; 595 596 cmd_desc_base_addr = lrbp->utr_descriptor_ptr->command_desc_base_addr; 597 addr = le64_to_cpu(cmd_desc_base_addr) & CQE_UCD_BA; 598 599 while (sq_head_slot != hwq->sq_tail_slot) { 600 utrd = hwq->sqe_base_addr + sq_head_slot; 601 match = le64_to_cpu(utrd->command_desc_base_addr) & CQE_UCD_BA; 602 if (addr == match) { 603 ufshcd_mcq_nullify_sqe(utrd); 604 ret = true; 605 goto out; 606 } 607 608 sq_head_slot++; 609 if (sq_head_slot == hwq->max_entries) 610 sq_head_slot = 0; 611 } 612 613 out: 614 ufshcd_mcq_sq_start(hba, hwq); 615 mutex_unlock(&hwq->sq_mutex); 616 return ret; 617 } 618 619 /** 620 * ufshcd_mcq_abort - Abort the command in MCQ. 621 * @cmd: The command to be aborted. 622 * 623 * Return: SUCCESS or FAILED error codes 624 */ 625 int ufshcd_mcq_abort(struct scsi_cmnd *cmd) 626 { 627 struct Scsi_Host *host = cmd->device->host; 628 struct ufs_hba *hba = shost_priv(host); 629 int tag = scsi_cmd_to_rq(cmd)->tag; 630 struct ufshcd_lrb *lrbp = &hba->lrb[tag]; 631 struct ufs_hw_queue *hwq; 632 unsigned long flags; 633 int err; 634 635 if (!ufshcd_cmd_inflight(lrbp->cmd)) { 636 dev_err(hba->dev, 637 "%s: skip abort. cmd at tag %d already completed.\n", 638 __func__, tag); 639 return FAILED; 640 } 641 642 /* Skip task abort in case previous aborts failed and report failure */ 643 if (lrbp->req_abort_skip) { 644 dev_err(hba->dev, "%s: skip abort. tag %d failed earlier\n", 645 __func__, tag); 646 return FAILED; 647 } 648 649 hwq = ufshcd_mcq_req_to_hwq(hba, scsi_cmd_to_rq(cmd)); 650 651 if (ufshcd_mcq_sqe_search(hba, hwq, tag)) { 652 /* 653 * Failure. The command should not be "stuck" in SQ for 654 * a long time which resulted in command being aborted. 655 */ 656 dev_err(hba->dev, "%s: cmd found in sq. hwq=%d, tag=%d\n", 657 __func__, hwq->id, tag); 658 return FAILED; 659 } 660 661 /* 662 * The command is not in the submission queue, and it is not 663 * in the completion queue either. Query the device to see if 664 * the command is being processed in the device. 665 */ 666 err = ufshcd_try_to_abort_task(hba, tag); 667 if (err) { 668 dev_err(hba->dev, "%s: device abort failed %d\n", __func__, err); 669 lrbp->req_abort_skip = true; 670 return FAILED; 671 } 672 673 spin_lock_irqsave(&hwq->cq_lock, flags); 674 if (ufshcd_cmd_inflight(lrbp->cmd)) 675 ufshcd_release_scsi_cmd(hba, lrbp); 676 spin_unlock_irqrestore(&hwq->cq_lock, flags); 677 678 return SUCCESS; 679 } 680