1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * libata-scsi.c - helper library for ATA 4 * 5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 6 * Copyright 2003-2004 Jeff Garzik 7 * 8 * libata documentation is available via 'make {ps|pdf}docs', 9 * as Documentation/driver-api/libata.rst 10 * 11 * Hardware documentation available from 12 * - http://www.t10.org/ 13 * - http://www.t13.org/ 14 */ 15 16 #include <linux/compat.h> 17 #include <linux/slab.h> 18 #include <linux/kernel.h> 19 #include <linux/blkdev.h> 20 #include <linux/spinlock.h> 21 #include <linux/export.h> 22 #include <scsi/scsi.h> 23 #include <scsi/scsi_host.h> 24 #include <scsi/scsi_cmnd.h> 25 #include <scsi/scsi_eh.h> 26 #include <scsi/scsi_device.h> 27 #include <scsi/scsi_tcq.h> 28 #include <scsi/scsi_transport.h> 29 #include <linux/libata.h> 30 #include <linux/hdreg.h> 31 #include <linux/uaccess.h> 32 #include <linux/suspend.h> 33 #include <asm/unaligned.h> 34 #include <linux/ioprio.h> 35 #include <linux/of.h> 36 37 #include "libata.h" 38 #include "libata-transport.h" 39 40 #define ATA_SCSI_RBUF_SIZE 576 41 42 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 43 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 44 45 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 46 47 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 48 const struct scsi_device *scsidev); 49 50 #define RW_RECOVERY_MPAGE 0x1 51 #define RW_RECOVERY_MPAGE_LEN 12 52 #define CACHE_MPAGE 0x8 53 #define CACHE_MPAGE_LEN 20 54 #define CONTROL_MPAGE 0xa 55 #define CONTROL_MPAGE_LEN 12 56 #define ALL_MPAGES 0x3f 57 #define ALL_SUB_MPAGES 0xff 58 59 60 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 61 RW_RECOVERY_MPAGE, 62 RW_RECOVERY_MPAGE_LEN - 2, 63 (1 << 7), /* AWRE */ 64 0, /* read retry count */ 65 0, 0, 0, 0, 66 0, /* write retry count */ 67 0, 0, 0 68 }; 69 70 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 71 CACHE_MPAGE, 72 CACHE_MPAGE_LEN - 2, 73 0, /* contains WCE, needs to be 0 for logic */ 74 0, 0, 0, 0, 0, 0, 0, 0, 0, 75 0, /* contains DRA, needs to be 0 for logic */ 76 0, 0, 0, 0, 0, 0, 0 77 }; 78 79 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 80 CONTROL_MPAGE, 81 CONTROL_MPAGE_LEN - 2, 82 2, /* DSENSE=0, GLTSD=1 */ 83 0, /* [QAM+QERR may be 1, see 05-359r1] */ 84 0, 0, 0, 0, 0xff, 0xff, 85 0, 30 /* extended self test time, see 05-359r1 */ 86 }; 87 88 static ssize_t ata_scsi_park_show(struct device *device, 89 struct device_attribute *attr, char *buf) 90 { 91 struct scsi_device *sdev = to_scsi_device(device); 92 struct ata_port *ap; 93 struct ata_link *link; 94 struct ata_device *dev; 95 unsigned long now; 96 unsigned int msecs; 97 int rc = 0; 98 99 ap = ata_shost_to_port(sdev->host); 100 101 spin_lock_irq(ap->lock); 102 dev = ata_scsi_find_dev(ap, sdev); 103 if (!dev) { 104 rc = -ENODEV; 105 goto unlock; 106 } 107 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 108 rc = -EOPNOTSUPP; 109 goto unlock; 110 } 111 112 link = dev->link; 113 now = jiffies; 114 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 115 link->eh_context.unloaded_mask & (1 << dev->devno) && 116 time_after(dev->unpark_deadline, now)) 117 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 118 else 119 msecs = 0; 120 121 unlock: 122 spin_unlock_irq(ap->lock); 123 124 return rc ? rc : sysfs_emit(buf, "%u\n", msecs); 125 } 126 127 static ssize_t ata_scsi_park_store(struct device *device, 128 struct device_attribute *attr, 129 const char *buf, size_t len) 130 { 131 struct scsi_device *sdev = to_scsi_device(device); 132 struct ata_port *ap; 133 struct ata_device *dev; 134 long int input; 135 unsigned long flags; 136 int rc; 137 138 rc = kstrtol(buf, 10, &input); 139 if (rc) 140 return rc; 141 if (input < -2) 142 return -EINVAL; 143 if (input > ATA_TMOUT_MAX_PARK) { 144 rc = -EOVERFLOW; 145 input = ATA_TMOUT_MAX_PARK; 146 } 147 148 ap = ata_shost_to_port(sdev->host); 149 150 spin_lock_irqsave(ap->lock, flags); 151 dev = ata_scsi_find_dev(ap, sdev); 152 if (unlikely(!dev)) { 153 rc = -ENODEV; 154 goto unlock; 155 } 156 if (dev->class != ATA_DEV_ATA && 157 dev->class != ATA_DEV_ZAC) { 158 rc = -EOPNOTSUPP; 159 goto unlock; 160 } 161 162 if (input >= 0) { 163 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 164 rc = -EOPNOTSUPP; 165 goto unlock; 166 } 167 168 dev->unpark_deadline = ata_deadline(jiffies, input); 169 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 170 ata_port_schedule_eh(ap); 171 complete(&ap->park_req_pending); 172 } else { 173 switch (input) { 174 case -1: 175 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 176 break; 177 case -2: 178 dev->flags |= ATA_DFLAG_NO_UNLOAD; 179 break; 180 } 181 } 182 unlock: 183 spin_unlock_irqrestore(ap->lock, flags); 184 185 return rc ? rc : len; 186 } 187 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 188 ata_scsi_park_show, ata_scsi_park_store); 189 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 190 191 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 192 u8 sk, u8 asc, u8 ascq) 193 { 194 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 195 196 if (!cmd) 197 return; 198 199 scsi_build_sense(cmd, d_sense, sk, asc, ascq); 200 } 201 202 void ata_scsi_set_sense_information(struct ata_device *dev, 203 struct scsi_cmnd *cmd, 204 const struct ata_taskfile *tf) 205 { 206 u64 information; 207 208 if (!cmd) 209 return; 210 211 information = ata_tf_read_block(tf, dev); 212 if (information == U64_MAX) 213 return; 214 215 scsi_set_sense_information(cmd->sense_buffer, 216 SCSI_SENSE_BUFFERSIZE, information); 217 } 218 219 static void ata_scsi_set_invalid_field(struct ata_device *dev, 220 struct scsi_cmnd *cmd, u16 field, u8 bit) 221 { 222 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 223 /* "Invalid field in CDB" */ 224 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 225 field, bit, 1); 226 } 227 228 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 229 struct scsi_cmnd *cmd, u16 field) 230 { 231 /* "Invalid field in parameter list" */ 232 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 233 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 234 field, 0xff, 0); 235 } 236 237 static struct attribute *ata_common_sdev_attrs[] = { 238 &dev_attr_unload_heads.attr, 239 NULL 240 }; 241 242 static const struct attribute_group ata_common_sdev_attr_group = { 243 .attrs = ata_common_sdev_attrs 244 }; 245 246 const struct attribute_group *ata_common_sdev_groups[] = { 247 &ata_common_sdev_attr_group, 248 NULL 249 }; 250 EXPORT_SYMBOL_GPL(ata_common_sdev_groups); 251 252 /** 253 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 254 * @sdev: SCSI device for which BIOS geometry is to be determined 255 * @bdev: block device associated with @sdev 256 * @capacity: capacity of SCSI device 257 * @geom: location to which geometry will be output 258 * 259 * Generic bios head/sector/cylinder calculator 260 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 261 * mapping. Some situations may arise where the disk is not 262 * bootable if this is not used. 263 * 264 * LOCKING: 265 * Defined by the SCSI layer. We don't really care. 266 * 267 * RETURNS: 268 * Zero. 269 */ 270 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 271 sector_t capacity, int geom[]) 272 { 273 geom[0] = 255; 274 geom[1] = 63; 275 sector_div(capacity, 255*63); 276 geom[2] = capacity; 277 278 return 0; 279 } 280 EXPORT_SYMBOL_GPL(ata_std_bios_param); 281 282 /** 283 * ata_scsi_unlock_native_capacity - unlock native capacity 284 * @sdev: SCSI device to adjust device capacity for 285 * 286 * This function is called if a partition on @sdev extends beyond 287 * the end of the device. It requests EH to unlock HPA. 288 * 289 * LOCKING: 290 * Defined by the SCSI layer. Might sleep. 291 */ 292 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 293 { 294 struct ata_port *ap = ata_shost_to_port(sdev->host); 295 struct ata_device *dev; 296 unsigned long flags; 297 298 spin_lock_irqsave(ap->lock, flags); 299 300 dev = ata_scsi_find_dev(ap, sdev); 301 if (dev && dev->n_sectors < dev->n_native_sectors) { 302 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 303 dev->link->eh_info.action |= ATA_EH_RESET; 304 ata_port_schedule_eh(ap); 305 } 306 307 spin_unlock_irqrestore(ap->lock, flags); 308 ata_port_wait_eh(ap); 309 } 310 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 311 312 /** 313 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 314 * @ap: target port 315 * @sdev: SCSI device to get identify data for 316 * @arg: User buffer area for identify data 317 * 318 * LOCKING: 319 * Defined by the SCSI layer. We don't really care. 320 * 321 * RETURNS: 322 * Zero on success, negative errno on error. 323 */ 324 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 325 void __user *arg) 326 { 327 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 328 u16 __user *dst = arg; 329 char buf[40]; 330 331 if (!dev) 332 return -ENOMSG; 333 334 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 335 return -EFAULT; 336 337 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 338 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 339 return -EFAULT; 340 341 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 342 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 343 return -EFAULT; 344 345 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 346 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 347 return -EFAULT; 348 349 return 0; 350 } 351 352 /** 353 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 354 * @scsidev: Device to which we are issuing command 355 * @arg: User provided data for issuing command 356 * 357 * LOCKING: 358 * Defined by the SCSI layer. We don't really care. 359 * 360 * RETURNS: 361 * Zero on success, negative errno on error. 362 */ 363 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 364 { 365 int rc = 0; 366 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 367 u8 scsi_cmd[MAX_COMMAND_SIZE]; 368 u8 args[4], *argbuf = NULL; 369 int argsize = 0; 370 enum dma_data_direction data_dir; 371 struct scsi_sense_hdr sshdr; 372 int cmd_result; 373 374 if (arg == NULL) 375 return -EINVAL; 376 377 if (copy_from_user(args, arg, sizeof(args))) 378 return -EFAULT; 379 380 memset(sensebuf, 0, sizeof(sensebuf)); 381 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 382 383 if (args[3]) { 384 argsize = ATA_SECT_SIZE * args[3]; 385 argbuf = kmalloc(argsize, GFP_KERNEL); 386 if (argbuf == NULL) { 387 rc = -ENOMEM; 388 goto error; 389 } 390 391 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 392 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 393 block count in sector count field */ 394 data_dir = DMA_FROM_DEVICE; 395 } else { 396 scsi_cmd[1] = (3 << 1); /* Non-data */ 397 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 398 data_dir = DMA_NONE; 399 } 400 401 scsi_cmd[0] = ATA_16; 402 403 scsi_cmd[4] = args[2]; 404 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 405 scsi_cmd[6] = args[3]; 406 scsi_cmd[8] = args[1]; 407 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 408 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 409 } else { 410 scsi_cmd[6] = args[1]; 411 } 412 scsi_cmd[14] = args[0]; 413 414 /* Good values for timeout and retries? Values below 415 from scsi_ioctl_send_command() for default case... */ 416 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 417 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 418 419 if (cmd_result < 0) { 420 rc = cmd_result; 421 goto error; 422 } 423 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 424 u8 *desc = sensebuf + 8; 425 426 /* If we set cc then ATA pass-through will cause a 427 * check condition even if no error. Filter that. */ 428 if (scsi_status_is_check_condition(cmd_result)) { 429 if (sshdr.sense_key == RECOVERED_ERROR && 430 sshdr.asc == 0 && sshdr.ascq == 0x1d) 431 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 432 } 433 434 /* Send userspace a few ATA registers (same as drivers/ide) */ 435 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 436 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 437 args[0] = desc[13]; /* status */ 438 args[1] = desc[3]; /* error */ 439 args[2] = desc[5]; /* sector count (0:7) */ 440 if (copy_to_user(arg, args, sizeof(args))) 441 rc = -EFAULT; 442 } 443 } 444 445 446 if (cmd_result) { 447 rc = -EIO; 448 goto error; 449 } 450 451 if ((argbuf) 452 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 453 rc = -EFAULT; 454 error: 455 kfree(argbuf); 456 return rc; 457 } 458 459 /** 460 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 461 * @scsidev: Device to which we are issuing command 462 * @arg: User provided data for issuing command 463 * 464 * LOCKING: 465 * Defined by the SCSI layer. We don't really care. 466 * 467 * RETURNS: 468 * Zero on success, negative errno on error. 469 */ 470 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 471 { 472 int rc = 0; 473 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 474 u8 scsi_cmd[MAX_COMMAND_SIZE]; 475 u8 args[7]; 476 struct scsi_sense_hdr sshdr; 477 int cmd_result; 478 479 if (arg == NULL) 480 return -EINVAL; 481 482 if (copy_from_user(args, arg, sizeof(args))) 483 return -EFAULT; 484 485 memset(sensebuf, 0, sizeof(sensebuf)); 486 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 487 scsi_cmd[0] = ATA_16; 488 scsi_cmd[1] = (3 << 1); /* Non-data */ 489 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 490 scsi_cmd[4] = args[1]; 491 scsi_cmd[6] = args[2]; 492 scsi_cmd[8] = args[3]; 493 scsi_cmd[10] = args[4]; 494 scsi_cmd[12] = args[5]; 495 scsi_cmd[13] = args[6] & 0x4f; 496 scsi_cmd[14] = args[0]; 497 498 /* Good values for timeout and retries? Values below 499 from scsi_ioctl_send_command() for default case... */ 500 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 501 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 502 503 if (cmd_result < 0) { 504 rc = cmd_result; 505 goto error; 506 } 507 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 508 u8 *desc = sensebuf + 8; 509 510 /* If we set cc then ATA pass-through will cause a 511 * check condition even if no error. Filter that. */ 512 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 513 if (sshdr.sense_key == RECOVERED_ERROR && 514 sshdr.asc == 0 && sshdr.ascq == 0x1d) 515 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 516 } 517 518 /* Send userspace ATA registers */ 519 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 520 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 521 args[0] = desc[13]; /* status */ 522 args[1] = desc[3]; /* error */ 523 args[2] = desc[5]; /* sector count (0:7) */ 524 args[3] = desc[7]; /* lbal */ 525 args[4] = desc[9]; /* lbam */ 526 args[5] = desc[11]; /* lbah */ 527 args[6] = desc[12]; /* select */ 528 if (copy_to_user(arg, args, sizeof(args))) 529 rc = -EFAULT; 530 } 531 } 532 533 if (cmd_result) { 534 rc = -EIO; 535 goto error; 536 } 537 538 error: 539 return rc; 540 } 541 542 static bool ata_ioc32(struct ata_port *ap) 543 { 544 if (ap->flags & ATA_FLAG_PIO_DMA) 545 return true; 546 if (ap->pflags & ATA_PFLAG_PIO32) 547 return true; 548 return false; 549 } 550 551 /* 552 * This handles both native and compat commands, so anything added 553 * here must have a compatible argument, or check in_compat_syscall() 554 */ 555 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 556 unsigned int cmd, void __user *arg) 557 { 558 unsigned long val; 559 int rc = -EINVAL; 560 unsigned long flags; 561 562 switch (cmd) { 563 case HDIO_GET_32BIT: 564 spin_lock_irqsave(ap->lock, flags); 565 val = ata_ioc32(ap); 566 spin_unlock_irqrestore(ap->lock, flags); 567 #ifdef CONFIG_COMPAT 568 if (in_compat_syscall()) 569 return put_user(val, (compat_ulong_t __user *)arg); 570 #endif 571 return put_user(val, (unsigned long __user *)arg); 572 573 case HDIO_SET_32BIT: 574 val = (unsigned long) arg; 575 rc = 0; 576 spin_lock_irqsave(ap->lock, flags); 577 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 578 if (val) 579 ap->pflags |= ATA_PFLAG_PIO32; 580 else 581 ap->pflags &= ~ATA_PFLAG_PIO32; 582 } else { 583 if (val != ata_ioc32(ap)) 584 rc = -EINVAL; 585 } 586 spin_unlock_irqrestore(ap->lock, flags); 587 return rc; 588 589 case HDIO_GET_IDENTITY: 590 return ata_get_identity(ap, scsidev, arg); 591 592 case HDIO_DRIVE_CMD: 593 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 594 return -EACCES; 595 return ata_cmd_ioctl(scsidev, arg); 596 597 case HDIO_DRIVE_TASK: 598 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 599 return -EACCES; 600 return ata_task_ioctl(scsidev, arg); 601 602 default: 603 rc = -ENOTTY; 604 break; 605 } 606 607 return rc; 608 } 609 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 610 611 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 612 void __user *arg) 613 { 614 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 615 scsidev, cmd, arg); 616 } 617 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 618 619 /** 620 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 621 * @dev: ATA device to which the new command is attached 622 * @cmd: SCSI command that originated this ATA command 623 * 624 * Obtain a reference to an unused ata_queued_cmd structure, 625 * which is the basic libata structure representing a single 626 * ATA command sent to the hardware. 627 * 628 * If a command was available, fill in the SCSI-specific 629 * portions of the structure with information on the 630 * current command. 631 * 632 * LOCKING: 633 * spin_lock_irqsave(host lock) 634 * 635 * RETURNS: 636 * Command allocated, or %NULL if none available. 637 */ 638 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 639 struct scsi_cmnd *cmd) 640 { 641 struct ata_port *ap = dev->link->ap; 642 struct ata_queued_cmd *qc; 643 int tag; 644 645 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 646 goto fail; 647 648 if (ap->flags & ATA_FLAG_SAS_HOST) { 649 /* 650 * SAS hosts may queue > ATA_MAX_QUEUE commands so use 651 * unique per-device budget token as a tag. 652 */ 653 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE)) 654 goto fail; 655 tag = cmd->budget_token; 656 } else { 657 tag = scsi_cmd_to_rq(cmd)->tag; 658 } 659 660 qc = __ata_qc_from_tag(ap, tag); 661 qc->tag = qc->hw_tag = tag; 662 qc->ap = ap; 663 qc->dev = dev; 664 665 ata_qc_reinit(qc); 666 667 qc->scsicmd = cmd; 668 qc->scsidone = scsi_done; 669 670 qc->sg = scsi_sglist(cmd); 671 qc->n_elem = scsi_sg_count(cmd); 672 673 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 674 qc->flags |= ATA_QCFLAG_QUIET; 675 676 return qc; 677 678 fail: 679 set_host_byte(cmd, DID_OK); 680 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL); 681 scsi_done(cmd); 682 return NULL; 683 } 684 685 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 686 { 687 struct scsi_cmnd *scmd = qc->scsicmd; 688 689 qc->extrabytes = scmd->extra_len; 690 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 691 } 692 693 /** 694 * ata_dump_status - user friendly display of error info 695 * @ap: the port in question 696 * @tf: ptr to filled out taskfile 697 * 698 * Decode and dump the ATA error/status registers for the user so 699 * that they have some idea what really happened at the non 700 * make-believe layer. 701 * 702 * LOCKING: 703 * inherited from caller 704 */ 705 static void ata_dump_status(struct ata_port *ap, struct ata_taskfile *tf) 706 { 707 u8 stat = tf->status, err = tf->error; 708 709 if (stat & ATA_BUSY) { 710 ata_port_warn(ap, "status=0x%02x {Busy} ", stat); 711 } else { 712 ata_port_warn(ap, "status=0x%02x { %s%s%s%s%s%s%s} ", stat, 713 stat & ATA_DRDY ? "DriveReady " : "", 714 stat & ATA_DF ? "DeviceFault " : "", 715 stat & ATA_DSC ? "SeekComplete " : "", 716 stat & ATA_DRQ ? "DataRequest " : "", 717 stat & ATA_CORR ? "CorrectedError " : "", 718 stat & ATA_SENSE ? "Sense " : "", 719 stat & ATA_ERR ? "Error " : ""); 720 if (err) 721 ata_port_warn(ap, "error=0x%02x {%s%s%s%s%s%s", err, 722 err & ATA_ABORTED ? 723 "DriveStatusError " : "", 724 err & ATA_ICRC ? 725 (err & ATA_ABORTED ? 726 "BadCRC " : "Sector ") : "", 727 err & ATA_UNC ? "UncorrectableError " : "", 728 err & ATA_IDNF ? "SectorIdNotFound " : "", 729 err & ATA_TRK0NF ? "TrackZeroNotFound " : "", 730 err & ATA_AMNF ? "AddrMarkNotFound " : ""); 731 } 732 } 733 734 /** 735 * ata_to_sense_error - convert ATA error to SCSI error 736 * @id: ATA device number 737 * @drv_stat: value contained in ATA status register 738 * @drv_err: value contained in ATA error register 739 * @sk: the sense key we'll fill out 740 * @asc: the additional sense code we'll fill out 741 * @ascq: the additional sense code qualifier we'll fill out 742 * @verbose: be verbose 743 * 744 * Converts an ATA error into a SCSI error. Fill out pointers to 745 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 746 * format sense blocks. 747 * 748 * LOCKING: 749 * spin_lock_irqsave(host lock) 750 */ 751 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 752 u8 *asc, u8 *ascq, int verbose) 753 { 754 int i; 755 756 /* Based on the 3ware driver translation table */ 757 static const unsigned char sense_table[][4] = { 758 /* BBD|ECC|ID|MAR */ 759 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 760 // Device busy Aborted command 761 /* BBD|ECC|ID */ 762 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 763 // Device busy Aborted command 764 /* ECC|MC|MARK */ 765 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 766 // Device fault Hardware error 767 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 768 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 769 // Data CRC error SCSI parity error 770 /* MC|ID|ABRT|TRK0|MARK */ 771 {0x37, NOT_READY, 0x04, 0x00}, 772 // Unit offline Not ready 773 /* MCR|MARK */ 774 {0x09, NOT_READY, 0x04, 0x00}, 775 // Unrecovered disk error Not ready 776 /* Bad address mark */ 777 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 778 // Address mark not found for data field 779 /* TRK0 - Track 0 not found */ 780 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 781 // Hardware error 782 /* Abort: 0x04 is not translated here, see below */ 783 /* Media change request */ 784 {0x08, NOT_READY, 0x04, 0x00}, 785 // FIXME: faking offline 786 /* SRV/IDNF - ID not found */ 787 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 788 // Logical address out of range 789 /* MC - Media Changed */ 790 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 791 // Not ready to ready change, medium may have changed 792 /* ECC - Uncorrectable ECC error */ 793 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 794 // Unrecovered read error 795 /* BBD - block marked bad */ 796 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 797 // Block marked bad Medium error, unrecovered read error 798 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 799 }; 800 static const unsigned char stat_table[][4] = { 801 /* Must be first because BUSY means no other bits valid */ 802 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 803 // Busy, fake parity for now 804 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 805 // Device ready, unaligned write command 806 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 807 // Device fault, internal target failure 808 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 809 // Timed out in xfer, fake parity for now 810 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 811 // Recovered ECC error Medium error, recovered 812 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 813 }; 814 815 /* 816 * Is this an error we can process/parse 817 */ 818 if (drv_stat & ATA_BUSY) { 819 drv_err = 0; /* Ignore the err bits, they're invalid */ 820 } 821 822 if (drv_err) { 823 /* Look for drv_err */ 824 for (i = 0; sense_table[i][0] != 0xFF; i++) { 825 /* Look for best matches first */ 826 if ((sense_table[i][0] & drv_err) == 827 sense_table[i][0]) { 828 *sk = sense_table[i][1]; 829 *asc = sense_table[i][2]; 830 *ascq = sense_table[i][3]; 831 goto translate_done; 832 } 833 } 834 } 835 836 /* 837 * Fall back to interpreting status bits. Note that if the drv_err 838 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 839 * is not descriptive enough. 840 */ 841 for (i = 0; stat_table[i][0] != 0xFF; i++) { 842 if (stat_table[i][0] & drv_stat) { 843 *sk = stat_table[i][1]; 844 *asc = stat_table[i][2]; 845 *ascq = stat_table[i][3]; 846 goto translate_done; 847 } 848 } 849 850 /* 851 * We need a sensible error return here, which is tricky, and one 852 * that won't cause people to do things like return a disk wrongly. 853 */ 854 *sk = ABORTED_COMMAND; 855 *asc = 0x00; 856 *ascq = 0x00; 857 858 translate_done: 859 if (verbose) 860 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 861 id, drv_stat, drv_err, *sk, *asc, *ascq); 862 return; 863 } 864 865 /* 866 * ata_gen_passthru_sense - Generate check condition sense block. 867 * @qc: Command that completed. 868 * 869 * This function is specific to the ATA descriptor format sense 870 * block specified for the ATA pass through commands. Regardless 871 * of whether the command errored or not, return a sense 872 * block. Copy all controller registers into the sense 873 * block. If there was no error, we get the request from an ATA 874 * passthrough command, so we use the following sense data: 875 * sk = RECOVERED ERROR 876 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 877 * 878 * 879 * LOCKING: 880 * None. 881 */ 882 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 883 { 884 struct scsi_cmnd *cmd = qc->scsicmd; 885 struct ata_taskfile *tf = &qc->result_tf; 886 unsigned char *sb = cmd->sense_buffer; 887 unsigned char *desc = sb + 8; 888 int verbose = qc->ap->ops->error_handler == NULL; 889 u8 sense_key, asc, ascq; 890 891 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 892 893 /* 894 * Use ata_to_sense_error() to map status register bits 895 * onto sense key, asc & ascq. 896 */ 897 if (qc->err_mask || 898 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 899 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error, 900 &sense_key, &asc, &ascq, verbose); 901 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 902 } else { 903 /* 904 * ATA PASS-THROUGH INFORMATION AVAILABLE 905 * Always in descriptor format sense. 906 */ 907 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 908 } 909 910 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 911 u8 len; 912 913 /* descriptor format */ 914 len = sb[7]; 915 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 916 if (!desc) { 917 if (SCSI_SENSE_BUFFERSIZE < len + 14) 918 return; 919 sb[7] = len + 14; 920 desc = sb + 8 + len; 921 } 922 desc[0] = 9; 923 desc[1] = 12; 924 /* 925 * Copy registers into sense buffer. 926 */ 927 desc[2] = 0x00; 928 desc[3] = tf->error; 929 desc[5] = tf->nsect; 930 desc[7] = tf->lbal; 931 desc[9] = tf->lbam; 932 desc[11] = tf->lbah; 933 desc[12] = tf->device; 934 desc[13] = tf->status; 935 936 /* 937 * Fill in Extend bit, and the high order bytes 938 * if applicable. 939 */ 940 if (tf->flags & ATA_TFLAG_LBA48) { 941 desc[2] |= 0x01; 942 desc[4] = tf->hob_nsect; 943 desc[6] = tf->hob_lbal; 944 desc[8] = tf->hob_lbam; 945 desc[10] = tf->hob_lbah; 946 } 947 } else { 948 /* Fixed sense format */ 949 desc[0] = tf->error; 950 desc[1] = tf->status; 951 desc[2] = tf->device; 952 desc[3] = tf->nsect; 953 desc[7] = 0; 954 if (tf->flags & ATA_TFLAG_LBA48) { 955 desc[8] |= 0x80; 956 if (tf->hob_nsect) 957 desc[8] |= 0x40; 958 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 959 desc[8] |= 0x20; 960 } 961 desc[9] = tf->lbal; 962 desc[10] = tf->lbam; 963 desc[11] = tf->lbah; 964 } 965 } 966 967 /** 968 * ata_gen_ata_sense - generate a SCSI fixed sense block 969 * @qc: Command that we are erroring out 970 * 971 * Generate sense block for a failed ATA command @qc. Descriptor 972 * format is used to accommodate LBA48 block address. 973 * 974 * LOCKING: 975 * None. 976 */ 977 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 978 { 979 struct ata_device *dev = qc->dev; 980 struct scsi_cmnd *cmd = qc->scsicmd; 981 struct ata_taskfile *tf = &qc->result_tf; 982 unsigned char *sb = cmd->sense_buffer; 983 int verbose = qc->ap->ops->error_handler == NULL; 984 u64 block; 985 u8 sense_key, asc, ascq; 986 987 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 988 989 if (ata_dev_disabled(dev)) { 990 /* Device disabled after error recovery */ 991 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 992 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 993 return; 994 } 995 /* Use ata_to_sense_error() to map status register bits 996 * onto sense key, asc & ascq. 997 */ 998 if (qc->err_mask || 999 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1000 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error, 1001 &sense_key, &asc, &ascq, verbose); 1002 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1003 } else { 1004 /* Could not decode error */ 1005 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1006 tf->status, qc->err_mask); 1007 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1008 return; 1009 } 1010 1011 block = ata_tf_read_block(&qc->result_tf, dev); 1012 if (block == U64_MAX) 1013 return; 1014 1015 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1016 } 1017 1018 void ata_scsi_sdev_config(struct scsi_device *sdev) 1019 { 1020 sdev->use_10_for_rw = 1; 1021 sdev->use_10_for_ms = 1; 1022 sdev->no_write_same = 1; 1023 1024 /* Schedule policy is determined by ->qc_defer() callback and 1025 * it needs to see every deferred qc. Set dev_blocked to 1 to 1026 * prevent SCSI midlayer from automatically deferring 1027 * requests. 1028 */ 1029 sdev->max_device_blocked = 1; 1030 } 1031 1032 /** 1033 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1034 * @rq: request to be checked 1035 * 1036 * ATAPI commands which transfer variable length data to host 1037 * might overflow due to application error or hardware bug. This 1038 * function checks whether overflow should be drained and ignored 1039 * for @request. 1040 * 1041 * LOCKING: 1042 * None. 1043 * 1044 * RETURNS: 1045 * 1 if ; otherwise, 0. 1046 */ 1047 bool ata_scsi_dma_need_drain(struct request *rq) 1048 { 1049 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1050 1051 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1052 } 1053 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1054 1055 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1056 { 1057 struct request_queue *q = sdev->request_queue; 1058 1059 if (!ata_id_has_unload(dev->id)) 1060 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1061 1062 /* configure max sectors */ 1063 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1064 blk_queue_max_hw_sectors(q, dev->max_sectors); 1065 1066 if (dev->class == ATA_DEV_ATAPI) { 1067 sdev->sector_size = ATA_SECT_SIZE; 1068 1069 /* set DMA padding */ 1070 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1071 1072 /* make room for appending the drain */ 1073 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1074 1075 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1076 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1077 if (!sdev->dma_drain_buf) { 1078 ata_dev_err(dev, "drain buffer allocation failed\n"); 1079 return -ENOMEM; 1080 } 1081 } else { 1082 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1083 sdev->manage_start_stop = 1; 1084 } 1085 1086 /* 1087 * ata_pio_sectors() expects buffer for each sector to not cross 1088 * page boundary. Enforce it by requiring buffers to be sector 1089 * aligned, which works iff sector_size is not larger than 1090 * PAGE_SIZE. ATAPI devices also need the alignment as 1091 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1092 */ 1093 if (sdev->sector_size > PAGE_SIZE) 1094 ata_dev_warn(dev, 1095 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1096 sdev->sector_size); 1097 1098 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1099 1100 if (dev->flags & ATA_DFLAG_AN) 1101 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1102 1103 if (dev->flags & ATA_DFLAG_NCQ) { 1104 int depth; 1105 1106 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1107 depth = min(ATA_MAX_QUEUE, depth); 1108 scsi_change_queue_depth(sdev, depth); 1109 } 1110 1111 if (dev->flags & ATA_DFLAG_TRUSTED) 1112 sdev->security_supported = 1; 1113 1114 dev->sdev = sdev; 1115 return 0; 1116 } 1117 1118 /** 1119 * ata_scsi_slave_config - Set SCSI device attributes 1120 * @sdev: SCSI device to examine 1121 * 1122 * This is called before we actually start reading 1123 * and writing to the device, to configure certain 1124 * SCSI mid-layer behaviors. 1125 * 1126 * LOCKING: 1127 * Defined by SCSI layer. We don't really care. 1128 */ 1129 1130 int ata_scsi_slave_config(struct scsi_device *sdev) 1131 { 1132 struct ata_port *ap = ata_shost_to_port(sdev->host); 1133 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1134 int rc = 0; 1135 1136 ata_scsi_sdev_config(sdev); 1137 1138 if (dev) 1139 rc = ata_scsi_dev_config(sdev, dev); 1140 1141 return rc; 1142 } 1143 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1144 1145 /** 1146 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1147 * @sdev: SCSI device to be destroyed 1148 * 1149 * @sdev is about to be destroyed for hot/warm unplugging. If 1150 * this unplugging was initiated by libata as indicated by NULL 1151 * dev->sdev, this function doesn't have to do anything. 1152 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1153 * Clear dev->sdev, schedule the device for ATA detach and invoke 1154 * EH. 1155 * 1156 * LOCKING: 1157 * Defined by SCSI layer. We don't really care. 1158 */ 1159 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1160 { 1161 struct ata_port *ap = ata_shost_to_port(sdev->host); 1162 unsigned long flags; 1163 struct ata_device *dev; 1164 1165 if (!ap->ops->error_handler) 1166 return; 1167 1168 spin_lock_irqsave(ap->lock, flags); 1169 dev = __ata_scsi_find_dev(ap, sdev); 1170 if (dev && dev->sdev) { 1171 /* SCSI device already in CANCEL state, no need to offline it */ 1172 dev->sdev = NULL; 1173 dev->flags |= ATA_DFLAG_DETACH; 1174 ata_port_schedule_eh(ap); 1175 } 1176 spin_unlock_irqrestore(ap->lock, flags); 1177 1178 kfree(sdev->dma_drain_buf); 1179 } 1180 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1181 1182 /** 1183 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1184 * @qc: Storage for translated ATA taskfile 1185 * 1186 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1187 * (to start). Perhaps these commands should be preceded by 1188 * CHECK POWER MODE to see what power mode the device is already in. 1189 * [See SAT revision 5 at www.t10.org] 1190 * 1191 * LOCKING: 1192 * spin_lock_irqsave(host lock) 1193 * 1194 * RETURNS: 1195 * Zero on success, non-zero on error. 1196 */ 1197 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1198 { 1199 struct scsi_cmnd *scmd = qc->scsicmd; 1200 struct ata_taskfile *tf = &qc->tf; 1201 const u8 *cdb = scmd->cmnd; 1202 u16 fp; 1203 u8 bp = 0xff; 1204 1205 if (scmd->cmd_len < 5) { 1206 fp = 4; 1207 goto invalid_fld; 1208 } 1209 1210 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1211 tf->protocol = ATA_PROT_NODATA; 1212 if (cdb[1] & 0x1) { 1213 ; /* ignore IMMED bit, violates sat-r05 */ 1214 } 1215 if (cdb[4] & 0x2) { 1216 fp = 4; 1217 bp = 1; 1218 goto invalid_fld; /* LOEJ bit set not supported */ 1219 } 1220 if (((cdb[4] >> 4) & 0xf) != 0) { 1221 fp = 4; 1222 bp = 3; 1223 goto invalid_fld; /* power conditions not supported */ 1224 } 1225 1226 if (cdb[4] & 0x1) { 1227 tf->nsect = 1; /* 1 sector, lba=0 */ 1228 1229 if (qc->dev->flags & ATA_DFLAG_LBA) { 1230 tf->flags |= ATA_TFLAG_LBA; 1231 1232 tf->lbah = 0x0; 1233 tf->lbam = 0x0; 1234 tf->lbal = 0x0; 1235 tf->device |= ATA_LBA; 1236 } else { 1237 /* CHS */ 1238 tf->lbal = 0x1; /* sect */ 1239 tf->lbam = 0x0; /* cyl low */ 1240 tf->lbah = 0x0; /* cyl high */ 1241 } 1242 1243 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1244 } else { 1245 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1246 * or S5) causing some drives to spin up and down again. 1247 */ 1248 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1249 system_state == SYSTEM_POWER_OFF) 1250 goto skip; 1251 1252 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1253 system_entering_hibernation()) 1254 goto skip; 1255 1256 /* Issue ATA STANDBY IMMEDIATE command */ 1257 tf->command = ATA_CMD_STANDBYNOW1; 1258 } 1259 1260 /* 1261 * Standby and Idle condition timers could be implemented but that 1262 * would require libata to implement the Power condition mode page 1263 * and allow the user to change it. Changing mode pages requires 1264 * MODE SELECT to be implemented. 1265 */ 1266 1267 return 0; 1268 1269 invalid_fld: 1270 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1271 return 1; 1272 skip: 1273 scmd->result = SAM_STAT_GOOD; 1274 return 1; 1275 } 1276 1277 1278 /** 1279 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1280 * @qc: Storage for translated ATA taskfile 1281 * 1282 * Sets up an ATA taskfile to issue FLUSH CACHE or 1283 * FLUSH CACHE EXT. 1284 * 1285 * LOCKING: 1286 * spin_lock_irqsave(host lock) 1287 * 1288 * RETURNS: 1289 * Zero on success, non-zero on error. 1290 */ 1291 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1292 { 1293 struct ata_taskfile *tf = &qc->tf; 1294 1295 tf->flags |= ATA_TFLAG_DEVICE; 1296 tf->protocol = ATA_PROT_NODATA; 1297 1298 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1299 tf->command = ATA_CMD_FLUSH_EXT; 1300 else 1301 tf->command = ATA_CMD_FLUSH; 1302 1303 /* flush is critical for IO integrity, consider it an IO command */ 1304 qc->flags |= ATA_QCFLAG_IO; 1305 1306 return 0; 1307 } 1308 1309 /** 1310 * scsi_6_lba_len - Get LBA and transfer length 1311 * @cdb: SCSI command to translate 1312 * 1313 * Calculate LBA and transfer length for 6-byte commands. 1314 * 1315 * RETURNS: 1316 * @plba: the LBA 1317 * @plen: the transfer length 1318 */ 1319 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1320 { 1321 u64 lba = 0; 1322 u32 len; 1323 1324 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1325 lba |= ((u64)cdb[2]) << 8; 1326 lba |= ((u64)cdb[3]); 1327 1328 len = cdb[4]; 1329 1330 *plba = lba; 1331 *plen = len; 1332 } 1333 1334 /** 1335 * scsi_10_lba_len - Get LBA and transfer length 1336 * @cdb: SCSI command to translate 1337 * 1338 * Calculate LBA and transfer length for 10-byte commands. 1339 * 1340 * RETURNS: 1341 * @plba: the LBA 1342 * @plen: the transfer length 1343 */ 1344 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1345 { 1346 *plba = get_unaligned_be32(&cdb[2]); 1347 *plen = get_unaligned_be16(&cdb[7]); 1348 } 1349 1350 /** 1351 * scsi_16_lba_len - Get LBA and transfer length 1352 * @cdb: SCSI command to translate 1353 * 1354 * Calculate LBA and transfer length for 16-byte commands. 1355 * 1356 * RETURNS: 1357 * @plba: the LBA 1358 * @plen: the transfer length 1359 */ 1360 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1361 { 1362 *plba = get_unaligned_be64(&cdb[2]); 1363 *plen = get_unaligned_be32(&cdb[10]); 1364 } 1365 1366 /** 1367 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1368 * @qc: Storage for translated ATA taskfile 1369 * 1370 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1371 * 1372 * LOCKING: 1373 * spin_lock_irqsave(host lock) 1374 * 1375 * RETURNS: 1376 * Zero on success, non-zero on error. 1377 */ 1378 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1379 { 1380 struct scsi_cmnd *scmd = qc->scsicmd; 1381 struct ata_taskfile *tf = &qc->tf; 1382 struct ata_device *dev = qc->dev; 1383 u64 dev_sectors = qc->dev->n_sectors; 1384 const u8 *cdb = scmd->cmnd; 1385 u64 block; 1386 u32 n_block; 1387 u16 fp; 1388 1389 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1390 tf->protocol = ATA_PROT_NODATA; 1391 1392 switch (cdb[0]) { 1393 case VERIFY: 1394 if (scmd->cmd_len < 10) { 1395 fp = 9; 1396 goto invalid_fld; 1397 } 1398 scsi_10_lba_len(cdb, &block, &n_block); 1399 break; 1400 case VERIFY_16: 1401 if (scmd->cmd_len < 16) { 1402 fp = 15; 1403 goto invalid_fld; 1404 } 1405 scsi_16_lba_len(cdb, &block, &n_block); 1406 break; 1407 default: 1408 fp = 0; 1409 goto invalid_fld; 1410 } 1411 1412 if (!n_block) 1413 goto nothing_to_do; 1414 if (block >= dev_sectors) 1415 goto out_of_range; 1416 if ((block + n_block) > dev_sectors) 1417 goto out_of_range; 1418 1419 if (dev->flags & ATA_DFLAG_LBA) { 1420 tf->flags |= ATA_TFLAG_LBA; 1421 1422 if (lba_28_ok(block, n_block)) { 1423 /* use LBA28 */ 1424 tf->command = ATA_CMD_VERIFY; 1425 tf->device |= (block >> 24) & 0xf; 1426 } else if (lba_48_ok(block, n_block)) { 1427 if (!(dev->flags & ATA_DFLAG_LBA48)) 1428 goto out_of_range; 1429 1430 /* use LBA48 */ 1431 tf->flags |= ATA_TFLAG_LBA48; 1432 tf->command = ATA_CMD_VERIFY_EXT; 1433 1434 tf->hob_nsect = (n_block >> 8) & 0xff; 1435 1436 tf->hob_lbah = (block >> 40) & 0xff; 1437 tf->hob_lbam = (block >> 32) & 0xff; 1438 tf->hob_lbal = (block >> 24) & 0xff; 1439 } else 1440 /* request too large even for LBA48 */ 1441 goto out_of_range; 1442 1443 tf->nsect = n_block & 0xff; 1444 1445 tf->lbah = (block >> 16) & 0xff; 1446 tf->lbam = (block >> 8) & 0xff; 1447 tf->lbal = block & 0xff; 1448 1449 tf->device |= ATA_LBA; 1450 } else { 1451 /* CHS */ 1452 u32 sect, head, cyl, track; 1453 1454 if (!lba_28_ok(block, n_block)) 1455 goto out_of_range; 1456 1457 /* Convert LBA to CHS */ 1458 track = (u32)block / dev->sectors; 1459 cyl = track / dev->heads; 1460 head = track % dev->heads; 1461 sect = (u32)block % dev->sectors + 1; 1462 1463 /* Check whether the converted CHS can fit. 1464 Cylinder: 0-65535 1465 Head: 0-15 1466 Sector: 1-255*/ 1467 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1468 goto out_of_range; 1469 1470 tf->command = ATA_CMD_VERIFY; 1471 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1472 tf->lbal = sect; 1473 tf->lbam = cyl; 1474 tf->lbah = cyl >> 8; 1475 tf->device |= head; 1476 } 1477 1478 return 0; 1479 1480 invalid_fld: 1481 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1482 return 1; 1483 1484 out_of_range: 1485 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1486 /* "Logical Block Address out of range" */ 1487 return 1; 1488 1489 nothing_to_do: 1490 scmd->result = SAM_STAT_GOOD; 1491 return 1; 1492 } 1493 1494 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1495 { 1496 struct request *rq = scsi_cmd_to_rq(scmd); 1497 u32 req_blocks; 1498 1499 if (!blk_rq_is_passthrough(rq)) 1500 return true; 1501 1502 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1503 if (n_blocks > req_blocks) 1504 return false; 1505 1506 return true; 1507 } 1508 1509 /** 1510 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1511 * @qc: Storage for translated ATA taskfile 1512 * 1513 * Converts any of six SCSI read/write commands into the 1514 * ATA counterpart, including starting sector (LBA), 1515 * sector count, and taking into account the device's LBA48 1516 * support. 1517 * 1518 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1519 * %WRITE_16 are currently supported. 1520 * 1521 * LOCKING: 1522 * spin_lock_irqsave(host lock) 1523 * 1524 * RETURNS: 1525 * Zero on success, non-zero on error. 1526 */ 1527 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1528 { 1529 struct scsi_cmnd *scmd = qc->scsicmd; 1530 const u8 *cdb = scmd->cmnd; 1531 struct request *rq = scsi_cmd_to_rq(scmd); 1532 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1533 unsigned int tf_flags = 0; 1534 u64 block; 1535 u32 n_block; 1536 int rc; 1537 u16 fp = 0; 1538 1539 switch (cdb[0]) { 1540 case WRITE_6: 1541 case WRITE_10: 1542 case WRITE_16: 1543 tf_flags |= ATA_TFLAG_WRITE; 1544 break; 1545 } 1546 1547 /* Calculate the SCSI LBA, transfer length and FUA. */ 1548 switch (cdb[0]) { 1549 case READ_10: 1550 case WRITE_10: 1551 if (unlikely(scmd->cmd_len < 10)) { 1552 fp = 9; 1553 goto invalid_fld; 1554 } 1555 scsi_10_lba_len(cdb, &block, &n_block); 1556 if (cdb[1] & (1 << 3)) 1557 tf_flags |= ATA_TFLAG_FUA; 1558 if (!ata_check_nblocks(scmd, n_block)) 1559 goto invalid_fld; 1560 break; 1561 case READ_6: 1562 case WRITE_6: 1563 if (unlikely(scmd->cmd_len < 6)) { 1564 fp = 5; 1565 goto invalid_fld; 1566 } 1567 scsi_6_lba_len(cdb, &block, &n_block); 1568 1569 /* for 6-byte r/w commands, transfer length 0 1570 * means 256 blocks of data, not 0 block. 1571 */ 1572 if (!n_block) 1573 n_block = 256; 1574 if (!ata_check_nblocks(scmd, n_block)) 1575 goto invalid_fld; 1576 break; 1577 case READ_16: 1578 case WRITE_16: 1579 if (unlikely(scmd->cmd_len < 16)) { 1580 fp = 15; 1581 goto invalid_fld; 1582 } 1583 scsi_16_lba_len(cdb, &block, &n_block); 1584 if (cdb[1] & (1 << 3)) 1585 tf_flags |= ATA_TFLAG_FUA; 1586 if (!ata_check_nblocks(scmd, n_block)) 1587 goto invalid_fld; 1588 break; 1589 default: 1590 fp = 0; 1591 goto invalid_fld; 1592 } 1593 1594 /* Check and compose ATA command */ 1595 if (!n_block) 1596 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1597 * length 0 means transfer 0 block of data. 1598 * However, for ATA R/W commands, sector count 0 means 1599 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1600 * 1601 * WARNING: one or two older ATA drives treat 0 as 0... 1602 */ 1603 goto nothing_to_do; 1604 1605 qc->flags |= ATA_QCFLAG_IO; 1606 qc->nbytes = n_block * scmd->device->sector_size; 1607 1608 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1609 qc->hw_tag, class); 1610 1611 if (likely(rc == 0)) 1612 return 0; 1613 1614 if (rc == -ERANGE) 1615 goto out_of_range; 1616 /* treat all other errors as -EINVAL, fall through */ 1617 invalid_fld: 1618 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1619 return 1; 1620 1621 out_of_range: 1622 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1623 /* "Logical Block Address out of range" */ 1624 return 1; 1625 1626 nothing_to_do: 1627 scmd->result = SAM_STAT_GOOD; 1628 return 1; 1629 } 1630 1631 static void ata_qc_done(struct ata_queued_cmd *qc) 1632 { 1633 struct scsi_cmnd *cmd = qc->scsicmd; 1634 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1635 1636 ata_qc_free(qc); 1637 done(cmd); 1638 } 1639 1640 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1641 { 1642 struct ata_port *ap = qc->ap; 1643 struct scsi_cmnd *cmd = qc->scsicmd; 1644 u8 *cdb = cmd->cmnd; 1645 int need_sense = (qc->err_mask != 0); 1646 1647 /* For ATA pass thru (SAT) commands, generate a sense block if 1648 * user mandated it or if there's an error. Note that if we 1649 * generate because the user forced us to [CK_COND =1], a check 1650 * condition is generated and the ATA register values are returned 1651 * whether the command completed successfully or not. If there 1652 * was no error, we use the following sense data: 1653 * sk = RECOVERED ERROR 1654 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1655 */ 1656 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1657 ((cdb[2] & 0x20) || need_sense)) 1658 ata_gen_passthru_sense(qc); 1659 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1660 cmd->result = SAM_STAT_CHECK_CONDITION; 1661 else if (need_sense) 1662 ata_gen_ata_sense(qc); 1663 else 1664 cmd->result = SAM_STAT_GOOD; 1665 1666 if (need_sense && !ap->ops->error_handler) 1667 ata_dump_status(ap, &qc->result_tf); 1668 1669 ata_qc_done(qc); 1670 } 1671 1672 /** 1673 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1674 * @dev: ATA device to which the command is addressed 1675 * @cmd: SCSI command to execute 1676 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1677 * 1678 * Our ->queuecommand() function has decided that the SCSI 1679 * command issued can be directly translated into an ATA 1680 * command, rather than handled internally. 1681 * 1682 * This function sets up an ata_queued_cmd structure for the 1683 * SCSI command, and sends that ata_queued_cmd to the hardware. 1684 * 1685 * The xlat_func argument (actor) returns 0 if ready to execute 1686 * ATA command, else 1 to finish translation. If 1 is returned 1687 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1688 * to be set reflecting an error condition or clean (early) 1689 * termination. 1690 * 1691 * LOCKING: 1692 * spin_lock_irqsave(host lock) 1693 * 1694 * RETURNS: 1695 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1696 * needs to be deferred. 1697 */ 1698 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1699 ata_xlat_func_t xlat_func) 1700 { 1701 struct ata_port *ap = dev->link->ap; 1702 struct ata_queued_cmd *qc; 1703 int rc; 1704 1705 qc = ata_scsi_qc_new(dev, cmd); 1706 if (!qc) 1707 goto err_mem; 1708 1709 /* data is present; dma-map it */ 1710 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1711 cmd->sc_data_direction == DMA_TO_DEVICE) { 1712 if (unlikely(scsi_bufflen(cmd) < 1)) { 1713 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1714 goto err_did; 1715 } 1716 1717 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1718 1719 qc->dma_dir = cmd->sc_data_direction; 1720 } 1721 1722 qc->complete_fn = ata_scsi_qc_complete; 1723 1724 if (xlat_func(qc)) 1725 goto early_finish; 1726 1727 if (ap->ops->qc_defer) { 1728 if ((rc = ap->ops->qc_defer(qc))) 1729 goto defer; 1730 } 1731 1732 /* select device, send command to hardware */ 1733 ata_qc_issue(qc); 1734 1735 return 0; 1736 1737 early_finish: 1738 ata_qc_free(qc); 1739 scsi_done(cmd); 1740 return 0; 1741 1742 err_did: 1743 ata_qc_free(qc); 1744 cmd->result = (DID_ERROR << 16); 1745 scsi_done(cmd); 1746 err_mem: 1747 return 0; 1748 1749 defer: 1750 ata_qc_free(qc); 1751 if (rc == ATA_DEFER_LINK) 1752 return SCSI_MLQUEUE_DEVICE_BUSY; 1753 else 1754 return SCSI_MLQUEUE_HOST_BUSY; 1755 } 1756 1757 struct ata_scsi_args { 1758 struct ata_device *dev; 1759 u16 *id; 1760 struct scsi_cmnd *cmd; 1761 }; 1762 1763 /** 1764 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1765 * @args: device IDENTIFY data / SCSI command of interest. 1766 * @actor: Callback hook for desired SCSI command simulator 1767 * 1768 * Takes care of the hard work of simulating a SCSI command... 1769 * Mapping the response buffer, calling the command's handler, 1770 * and handling the handler's return value. This return value 1771 * indicates whether the handler wishes the SCSI command to be 1772 * completed successfully (0), or not (in which case cmd->result 1773 * and sense buffer are assumed to be set). 1774 * 1775 * LOCKING: 1776 * spin_lock_irqsave(host lock) 1777 */ 1778 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1779 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1780 { 1781 unsigned int rc; 1782 struct scsi_cmnd *cmd = args->cmd; 1783 unsigned long flags; 1784 1785 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1786 1787 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1788 rc = actor(args, ata_scsi_rbuf); 1789 if (rc == 0) 1790 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1791 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1792 1793 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1794 1795 if (rc == 0) 1796 cmd->result = SAM_STAT_GOOD; 1797 } 1798 1799 /** 1800 * ata_scsiop_inq_std - Simulate INQUIRY command 1801 * @args: device IDENTIFY data / SCSI command of interest. 1802 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1803 * 1804 * Returns standard device identification data associated 1805 * with non-VPD INQUIRY command output. 1806 * 1807 * LOCKING: 1808 * spin_lock_irqsave(host lock) 1809 */ 1810 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1811 { 1812 static const u8 versions[] = { 1813 0x00, 1814 0x60, /* SAM-3 (no version claimed) */ 1815 1816 0x03, 1817 0x20, /* SBC-2 (no version claimed) */ 1818 1819 0x03, 1820 0x00 /* SPC-3 (no version claimed) */ 1821 }; 1822 static const u8 versions_zbc[] = { 1823 0x00, 1824 0xA0, /* SAM-5 (no version claimed) */ 1825 1826 0x06, 1827 0x00, /* SBC-4 (no version claimed) */ 1828 1829 0x05, 1830 0xC0, /* SPC-5 (no version claimed) */ 1831 1832 0x60, 1833 0x24, /* ZBC r05 */ 1834 }; 1835 1836 u8 hdr[] = { 1837 TYPE_DISK, 1838 0, 1839 0x5, /* claim SPC-3 version compatibility */ 1840 2, 1841 95 - 4, 1842 0, 1843 0, 1844 2 1845 }; 1846 1847 /* set scsi removable (RMB) bit per ata bit, or if the 1848 * AHCI port says it's external (Hotplug-capable, eSATA). 1849 */ 1850 if (ata_id_removable(args->id) || 1851 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1852 hdr[1] |= (1 << 7); 1853 1854 if (args->dev->class == ATA_DEV_ZAC) { 1855 hdr[0] = TYPE_ZBC; 1856 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1857 } 1858 1859 memcpy(rbuf, hdr, sizeof(hdr)); 1860 memcpy(&rbuf[8], "ATA ", 8); 1861 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1862 1863 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1864 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1865 if (strncmp(&rbuf[32], " ", 4) == 0) 1866 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1867 1868 if (rbuf[32] == 0 || rbuf[32] == ' ') 1869 memcpy(&rbuf[32], "n/a ", 4); 1870 1871 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1872 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1873 else 1874 memcpy(rbuf + 58, versions, sizeof(versions)); 1875 1876 return 0; 1877 } 1878 1879 /** 1880 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1881 * @args: device IDENTIFY data / SCSI command of interest. 1882 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1883 * 1884 * Returns list of inquiry VPD pages available. 1885 * 1886 * LOCKING: 1887 * spin_lock_irqsave(host lock) 1888 */ 1889 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1890 { 1891 int i, num_pages = 0; 1892 static const u8 pages[] = { 1893 0x00, /* page 0x00, this page */ 1894 0x80, /* page 0x80, unit serial no page */ 1895 0x83, /* page 0x83, device ident page */ 1896 0x89, /* page 0x89, ata info page */ 1897 0xb0, /* page 0xb0, block limits page */ 1898 0xb1, /* page 0xb1, block device characteristics page */ 1899 0xb2, /* page 0xb2, thin provisioning page */ 1900 0xb6, /* page 0xb6, zoned block device characteristics */ 1901 0xb9, /* page 0xb9, concurrent positioning ranges */ 1902 }; 1903 1904 for (i = 0; i < sizeof(pages); i++) { 1905 if (pages[i] == 0xb6 && 1906 !(args->dev->flags & ATA_DFLAG_ZAC)) 1907 continue; 1908 rbuf[num_pages + 4] = pages[i]; 1909 num_pages++; 1910 } 1911 rbuf[3] = num_pages; /* number of supported VPD pages */ 1912 return 0; 1913 } 1914 1915 /** 1916 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1917 * @args: device IDENTIFY data / SCSI command of interest. 1918 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1919 * 1920 * Returns ATA device serial number. 1921 * 1922 * LOCKING: 1923 * spin_lock_irqsave(host lock) 1924 */ 1925 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1926 { 1927 static const u8 hdr[] = { 1928 0, 1929 0x80, /* this page code */ 1930 0, 1931 ATA_ID_SERNO_LEN, /* page len */ 1932 }; 1933 1934 memcpy(rbuf, hdr, sizeof(hdr)); 1935 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1936 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1937 return 0; 1938 } 1939 1940 /** 1941 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1942 * @args: device IDENTIFY data / SCSI command of interest. 1943 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1944 * 1945 * Yields two logical unit device identification designators: 1946 * - vendor specific ASCII containing the ATA serial number 1947 * - SAT defined "t10 vendor id based" containing ASCII vendor 1948 * name ("ATA "), model and serial numbers. 1949 * 1950 * LOCKING: 1951 * spin_lock_irqsave(host lock) 1952 */ 1953 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 1954 { 1955 const int sat_model_serial_desc_len = 68; 1956 int num; 1957 1958 rbuf[1] = 0x83; /* this page code */ 1959 num = 4; 1960 1961 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1962 rbuf[num + 0] = 2; 1963 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1964 num += 4; 1965 ata_id_string(args->id, (unsigned char *) rbuf + num, 1966 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1967 num += ATA_ID_SERNO_LEN; 1968 1969 /* SAT defined lu model and serial numbers descriptor */ 1970 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 1971 rbuf[num + 0] = 2; 1972 rbuf[num + 1] = 1; 1973 rbuf[num + 3] = sat_model_serial_desc_len; 1974 num += 4; 1975 memcpy(rbuf + num, "ATA ", 8); 1976 num += 8; 1977 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 1978 ATA_ID_PROD_LEN); 1979 num += ATA_ID_PROD_LEN; 1980 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 1981 ATA_ID_SERNO_LEN); 1982 num += ATA_ID_SERNO_LEN; 1983 1984 if (ata_id_has_wwn(args->id)) { 1985 /* SAT defined lu world wide name */ 1986 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 1987 rbuf[num + 0] = 1; 1988 rbuf[num + 1] = 3; 1989 rbuf[num + 3] = ATA_ID_WWN_LEN; 1990 num += 4; 1991 ata_id_string(args->id, (unsigned char *) rbuf + num, 1992 ATA_ID_WWN, ATA_ID_WWN_LEN); 1993 num += ATA_ID_WWN_LEN; 1994 } 1995 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 1996 return 0; 1997 } 1998 1999 /** 2000 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2001 * @args: device IDENTIFY data / SCSI command of interest. 2002 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2003 * 2004 * Yields SAT-specified ATA VPD page. 2005 * 2006 * LOCKING: 2007 * spin_lock_irqsave(host lock) 2008 */ 2009 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2010 { 2011 rbuf[1] = 0x89; /* our page code */ 2012 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2013 rbuf[3] = (0x238 & 0xff); 2014 2015 memcpy(&rbuf[8], "linux ", 8); 2016 memcpy(&rbuf[16], "libata ", 16); 2017 memcpy(&rbuf[32], DRV_VERSION, 4); 2018 2019 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2020 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2021 /* TODO: PMP? */ 2022 2023 /* we don't store the ATA device signature, so we fake it */ 2024 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2025 rbuf[40] = 0x1; 2026 rbuf[48] = 0x1; 2027 2028 rbuf[56] = ATA_CMD_ID_ATA; 2029 2030 memcpy(&rbuf[60], &args->id[0], 512); 2031 return 0; 2032 } 2033 2034 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2035 { 2036 struct ata_device *dev = args->dev; 2037 u16 min_io_sectors; 2038 2039 rbuf[1] = 0xb0; 2040 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2041 2042 /* 2043 * Optimal transfer length granularity. 2044 * 2045 * This is always one physical block, but for disks with a smaller 2046 * logical than physical sector size we need to figure out what the 2047 * latter is. 2048 */ 2049 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2050 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2051 2052 /* 2053 * Optimal unmap granularity. 2054 * 2055 * The ATA spec doesn't even know about a granularity or alignment 2056 * for the TRIM command. We can leave away most of the unmap related 2057 * VPD page entries, but we have specifify a granularity to signal 2058 * that we support some form of unmap - in thise case via WRITE SAME 2059 * with the unmap bit set. 2060 */ 2061 if (ata_id_has_trim(args->id)) { 2062 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2063 2064 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2065 max_blocks = 128 << (20 - SECTOR_SHIFT); 2066 2067 put_unaligned_be64(max_blocks, &rbuf[36]); 2068 put_unaligned_be32(1, &rbuf[28]); 2069 } 2070 2071 return 0; 2072 } 2073 2074 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2075 { 2076 int form_factor = ata_id_form_factor(args->id); 2077 int media_rotation_rate = ata_id_rotation_rate(args->id); 2078 u8 zoned = ata_id_zoned_cap(args->id); 2079 2080 rbuf[1] = 0xb1; 2081 rbuf[3] = 0x3c; 2082 rbuf[4] = media_rotation_rate >> 8; 2083 rbuf[5] = media_rotation_rate; 2084 rbuf[7] = form_factor; 2085 if (zoned) 2086 rbuf[8] = (zoned << 4); 2087 2088 return 0; 2089 } 2090 2091 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2092 { 2093 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2094 rbuf[1] = 0xb2; 2095 rbuf[3] = 0x4; 2096 rbuf[5] = 1 << 6; /* TPWS */ 2097 2098 return 0; 2099 } 2100 2101 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2102 { 2103 /* 2104 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2105 */ 2106 rbuf[1] = 0xb6; 2107 rbuf[3] = 0x3C; 2108 2109 /* 2110 * URSWRZ bit is only meaningful for host-managed ZAC drives 2111 */ 2112 if (args->dev->zac_zoned_cap & 1) 2113 rbuf[4] |= 1; 2114 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2115 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2116 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2117 2118 return 0; 2119 } 2120 2121 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2122 { 2123 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2124 u8 *desc = &rbuf[64]; 2125 int i; 2126 2127 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2128 rbuf[1] = 0xb9; 2129 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2130 2131 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2132 desc[0] = cpr_log->cpr[i].num; 2133 desc[1] = cpr_log->cpr[i].num_storage_elements; 2134 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2135 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2136 } 2137 2138 return 0; 2139 } 2140 2141 /** 2142 * modecpy - Prepare response for MODE SENSE 2143 * @dest: output buffer 2144 * @src: data being copied 2145 * @n: length of mode page 2146 * @changeable: whether changeable parameters are requested 2147 * 2148 * Generate a generic MODE SENSE page for either current or changeable 2149 * parameters. 2150 * 2151 * LOCKING: 2152 * None. 2153 */ 2154 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2155 { 2156 if (changeable) { 2157 memcpy(dest, src, 2); 2158 memset(dest + 2, 0, n - 2); 2159 } else { 2160 memcpy(dest, src, n); 2161 } 2162 } 2163 2164 /** 2165 * ata_msense_caching - Simulate MODE SENSE caching info page 2166 * @id: device IDENTIFY data 2167 * @buf: output buffer 2168 * @changeable: whether changeable parameters are requested 2169 * 2170 * Generate a caching info page, which conditionally indicates 2171 * write caching to the SCSI layer, depending on device 2172 * capabilities. 2173 * 2174 * LOCKING: 2175 * None. 2176 */ 2177 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2178 { 2179 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2180 if (changeable) { 2181 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2182 } else { 2183 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2184 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2185 } 2186 return sizeof(def_cache_mpage); 2187 } 2188 2189 /** 2190 * ata_msense_control - Simulate MODE SENSE control mode page 2191 * @dev: ATA device of interest 2192 * @buf: output buffer 2193 * @changeable: whether changeable parameters are requested 2194 * 2195 * Generate a generic MODE SENSE control mode page. 2196 * 2197 * LOCKING: 2198 * None. 2199 */ 2200 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2201 bool changeable) 2202 { 2203 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2204 if (changeable) { 2205 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2206 } else { 2207 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2208 2209 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2210 } 2211 return sizeof(def_control_mpage); 2212 } 2213 2214 /** 2215 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2216 * @buf: output buffer 2217 * @changeable: whether changeable parameters are requested 2218 * 2219 * Generate a generic MODE SENSE r/w error recovery page. 2220 * 2221 * LOCKING: 2222 * None. 2223 */ 2224 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2225 { 2226 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2227 changeable); 2228 return sizeof(def_rw_recovery_mpage); 2229 } 2230 2231 /* 2232 * We can turn this into a real blacklist if it's needed, for now just 2233 * blacklist any Maxtor BANC1G10 revision firmware 2234 */ 2235 static int ata_dev_supports_fua(u16 *id) 2236 { 2237 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2238 2239 if (!libata_fua) 2240 return 0; 2241 if (!ata_id_has_fua(id)) 2242 return 0; 2243 2244 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2245 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2246 2247 if (strcmp(model, "Maxtor")) 2248 return 1; 2249 if (strcmp(fw, "BANC1G10")) 2250 return 1; 2251 2252 return 0; /* blacklisted */ 2253 } 2254 2255 /** 2256 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2257 * @args: device IDENTIFY data / SCSI command of interest. 2258 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2259 * 2260 * Simulate MODE SENSE commands. Assume this is invoked for direct 2261 * access devices (e.g. disks) only. There should be no block 2262 * descriptor for other device types. 2263 * 2264 * LOCKING: 2265 * spin_lock_irqsave(host lock) 2266 */ 2267 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2268 { 2269 struct ata_device *dev = args->dev; 2270 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2271 static const u8 sat_blk_desc[] = { 2272 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2273 0, 2274 0, 0x2, 0x0 /* block length: 512 bytes */ 2275 }; 2276 u8 pg, spg; 2277 unsigned int ebd, page_control, six_byte; 2278 u8 dpofua, bp = 0xff; 2279 u16 fp; 2280 2281 six_byte = (scsicmd[0] == MODE_SENSE); 2282 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2283 /* 2284 * LLBA bit in msense(10) ignored (compliant) 2285 */ 2286 2287 page_control = scsicmd[2] >> 6; 2288 switch (page_control) { 2289 case 0: /* current */ 2290 case 1: /* changeable */ 2291 case 2: /* defaults */ 2292 break; /* supported */ 2293 case 3: /* saved */ 2294 goto saving_not_supp; 2295 default: 2296 fp = 2; 2297 bp = 6; 2298 goto invalid_fld; 2299 } 2300 2301 if (six_byte) 2302 p += 4 + (ebd ? 8 : 0); 2303 else 2304 p += 8 + (ebd ? 8 : 0); 2305 2306 pg = scsicmd[2] & 0x3f; 2307 spg = scsicmd[3]; 2308 /* 2309 * No mode subpages supported (yet) but asking for _all_ 2310 * subpages may be valid 2311 */ 2312 if (spg && (spg != ALL_SUB_MPAGES)) { 2313 fp = 3; 2314 goto invalid_fld; 2315 } 2316 2317 switch(pg) { 2318 case RW_RECOVERY_MPAGE: 2319 p += ata_msense_rw_recovery(p, page_control == 1); 2320 break; 2321 2322 case CACHE_MPAGE: 2323 p += ata_msense_caching(args->id, p, page_control == 1); 2324 break; 2325 2326 case CONTROL_MPAGE: 2327 p += ata_msense_control(args->dev, p, page_control == 1); 2328 break; 2329 2330 case ALL_MPAGES: 2331 p += ata_msense_rw_recovery(p, page_control == 1); 2332 p += ata_msense_caching(args->id, p, page_control == 1); 2333 p += ata_msense_control(args->dev, p, page_control == 1); 2334 break; 2335 2336 default: /* invalid page code */ 2337 fp = 2; 2338 goto invalid_fld; 2339 } 2340 2341 dpofua = 0; 2342 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2343 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2344 dpofua = 1 << 4; 2345 2346 if (six_byte) { 2347 rbuf[0] = p - rbuf - 1; 2348 rbuf[2] |= dpofua; 2349 if (ebd) { 2350 rbuf[3] = sizeof(sat_blk_desc); 2351 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2352 } 2353 } else { 2354 unsigned int output_len = p - rbuf - 2; 2355 2356 rbuf[0] = output_len >> 8; 2357 rbuf[1] = output_len; 2358 rbuf[3] |= dpofua; 2359 if (ebd) { 2360 rbuf[7] = sizeof(sat_blk_desc); 2361 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2362 } 2363 } 2364 return 0; 2365 2366 invalid_fld: 2367 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2368 return 1; 2369 2370 saving_not_supp: 2371 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2372 /* "Saving parameters not supported" */ 2373 return 1; 2374 } 2375 2376 /** 2377 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2378 * @args: device IDENTIFY data / SCSI command of interest. 2379 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2380 * 2381 * Simulate READ CAPACITY commands. 2382 * 2383 * LOCKING: 2384 * None. 2385 */ 2386 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2387 { 2388 struct ata_device *dev = args->dev; 2389 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2390 u32 sector_size; /* physical sector size in bytes */ 2391 u8 log2_per_phys; 2392 u16 lowest_aligned; 2393 2394 sector_size = ata_id_logical_sector_size(dev->id); 2395 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2396 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2397 2398 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2399 if (last_lba >= 0xffffffffULL) 2400 last_lba = 0xffffffff; 2401 2402 /* sector count, 32-bit */ 2403 rbuf[0] = last_lba >> (8 * 3); 2404 rbuf[1] = last_lba >> (8 * 2); 2405 rbuf[2] = last_lba >> (8 * 1); 2406 rbuf[3] = last_lba; 2407 2408 /* sector size */ 2409 rbuf[4] = sector_size >> (8 * 3); 2410 rbuf[5] = sector_size >> (8 * 2); 2411 rbuf[6] = sector_size >> (8 * 1); 2412 rbuf[7] = sector_size; 2413 } else { 2414 /* sector count, 64-bit */ 2415 rbuf[0] = last_lba >> (8 * 7); 2416 rbuf[1] = last_lba >> (8 * 6); 2417 rbuf[2] = last_lba >> (8 * 5); 2418 rbuf[3] = last_lba >> (8 * 4); 2419 rbuf[4] = last_lba >> (8 * 3); 2420 rbuf[5] = last_lba >> (8 * 2); 2421 rbuf[6] = last_lba >> (8 * 1); 2422 rbuf[7] = last_lba; 2423 2424 /* sector size */ 2425 rbuf[ 8] = sector_size >> (8 * 3); 2426 rbuf[ 9] = sector_size >> (8 * 2); 2427 rbuf[10] = sector_size >> (8 * 1); 2428 rbuf[11] = sector_size; 2429 2430 rbuf[12] = 0; 2431 rbuf[13] = log2_per_phys; 2432 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2433 rbuf[15] = lowest_aligned; 2434 2435 if (ata_id_has_trim(args->id) && 2436 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2437 rbuf[14] |= 0x80; /* LBPME */ 2438 2439 if (ata_id_has_zero_after_trim(args->id) && 2440 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2441 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2442 rbuf[14] |= 0x40; /* LBPRZ */ 2443 } 2444 } 2445 if (ata_id_zoned_cap(args->id) || 2446 args->dev->class == ATA_DEV_ZAC) 2447 rbuf[12] = (1 << 4); /* RC_BASIS */ 2448 } 2449 return 0; 2450 } 2451 2452 /** 2453 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2454 * @args: device IDENTIFY data / SCSI command of interest. 2455 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2456 * 2457 * Simulate REPORT LUNS command. 2458 * 2459 * LOCKING: 2460 * spin_lock_irqsave(host lock) 2461 */ 2462 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2463 { 2464 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2465 2466 return 0; 2467 } 2468 2469 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2470 { 2471 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2472 /* FIXME: not quite right; we don't want the 2473 * translation of taskfile registers into 2474 * a sense descriptors, since that's only 2475 * correct for ATA, not ATAPI 2476 */ 2477 ata_gen_passthru_sense(qc); 2478 } 2479 2480 ata_qc_done(qc); 2481 } 2482 2483 /* is it pointless to prefer PIO for "safety reasons"? */ 2484 static inline int ata_pio_use_silly(struct ata_port *ap) 2485 { 2486 return (ap->flags & ATA_FLAG_PIO_DMA); 2487 } 2488 2489 static void atapi_request_sense(struct ata_queued_cmd *qc) 2490 { 2491 struct ata_port *ap = qc->ap; 2492 struct scsi_cmnd *cmd = qc->scsicmd; 2493 2494 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2495 2496 #ifdef CONFIG_ATA_SFF 2497 if (ap->ops->sff_tf_read) 2498 ap->ops->sff_tf_read(ap, &qc->tf); 2499 #endif 2500 2501 /* fill these in, for the case where they are -not- overwritten */ 2502 cmd->sense_buffer[0] = 0x70; 2503 cmd->sense_buffer[2] = qc->tf.error >> 4; 2504 2505 ata_qc_reinit(qc); 2506 2507 /* setup sg table and init transfer direction */ 2508 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2509 ata_sg_init(qc, &qc->sgent, 1); 2510 qc->dma_dir = DMA_FROM_DEVICE; 2511 2512 memset(&qc->cdb, 0, qc->dev->cdb_len); 2513 qc->cdb[0] = REQUEST_SENSE; 2514 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2515 2516 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2517 qc->tf.command = ATA_CMD_PACKET; 2518 2519 if (ata_pio_use_silly(ap)) { 2520 qc->tf.protocol = ATAPI_PROT_DMA; 2521 qc->tf.feature |= ATAPI_PKT_DMA; 2522 } else { 2523 qc->tf.protocol = ATAPI_PROT_PIO; 2524 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2525 qc->tf.lbah = 0; 2526 } 2527 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2528 2529 qc->complete_fn = atapi_sense_complete; 2530 2531 ata_qc_issue(qc); 2532 } 2533 2534 /* 2535 * ATAPI devices typically report zero for their SCSI version, and sometimes 2536 * deviate from the spec WRT response data format. If SCSI version is 2537 * reported as zero like normal, then we make the following fixups: 2538 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2539 * modern device. 2540 * 2) Ensure response data format / ATAPI information are always correct. 2541 */ 2542 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2543 { 2544 u8 buf[4]; 2545 2546 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2547 if (buf[2] == 0) { 2548 buf[2] = 0x5; 2549 buf[3] = 0x32; 2550 } 2551 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2552 } 2553 2554 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2555 { 2556 struct scsi_cmnd *cmd = qc->scsicmd; 2557 unsigned int err_mask = qc->err_mask; 2558 2559 /* handle completion from new EH */ 2560 if (unlikely(qc->ap->ops->error_handler && 2561 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2562 2563 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2564 /* FIXME: not quite right; we don't want the 2565 * translation of taskfile registers into a 2566 * sense descriptors, since that's only 2567 * correct for ATA, not ATAPI 2568 */ 2569 ata_gen_passthru_sense(qc); 2570 } 2571 2572 /* SCSI EH automatically locks door if sdev->locked is 2573 * set. Sometimes door lock request continues to 2574 * fail, for example, when no media is present. This 2575 * creates a loop - SCSI EH issues door lock which 2576 * fails and gets invoked again to acquire sense data 2577 * for the failed command. 2578 * 2579 * If door lock fails, always clear sdev->locked to 2580 * avoid this infinite loop. 2581 * 2582 * This may happen before SCSI scan is complete. Make 2583 * sure qc->dev->sdev isn't NULL before dereferencing. 2584 */ 2585 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2586 qc->dev->sdev->locked = 0; 2587 2588 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2589 ata_qc_done(qc); 2590 return; 2591 } 2592 2593 /* successful completion or old EH failure path */ 2594 if (unlikely(err_mask & AC_ERR_DEV)) { 2595 cmd->result = SAM_STAT_CHECK_CONDITION; 2596 atapi_request_sense(qc); 2597 return; 2598 } else if (unlikely(err_mask)) { 2599 /* FIXME: not quite right; we don't want the 2600 * translation of taskfile registers into 2601 * a sense descriptors, since that's only 2602 * correct for ATA, not ATAPI 2603 */ 2604 ata_gen_passthru_sense(qc); 2605 } else { 2606 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2607 atapi_fixup_inquiry(cmd); 2608 cmd->result = SAM_STAT_GOOD; 2609 } 2610 2611 ata_qc_done(qc); 2612 } 2613 /** 2614 * atapi_xlat - Initialize PACKET taskfile 2615 * @qc: command structure to be initialized 2616 * 2617 * LOCKING: 2618 * spin_lock_irqsave(host lock) 2619 * 2620 * RETURNS: 2621 * Zero on success, non-zero on failure. 2622 */ 2623 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2624 { 2625 struct scsi_cmnd *scmd = qc->scsicmd; 2626 struct ata_device *dev = qc->dev; 2627 int nodata = (scmd->sc_data_direction == DMA_NONE); 2628 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2629 unsigned int nbytes; 2630 2631 memset(qc->cdb, 0, dev->cdb_len); 2632 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2633 2634 qc->complete_fn = atapi_qc_complete; 2635 2636 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2637 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2638 qc->tf.flags |= ATA_TFLAG_WRITE; 2639 } 2640 2641 qc->tf.command = ATA_CMD_PACKET; 2642 ata_qc_set_pc_nbytes(qc); 2643 2644 /* check whether ATAPI DMA is safe */ 2645 if (!nodata && !using_pio && atapi_check_dma(qc)) 2646 using_pio = 1; 2647 2648 /* Some controller variants snoop this value for Packet 2649 * transfers to do state machine and FIFO management. Thus we 2650 * want to set it properly, and for DMA where it is 2651 * effectively meaningless. 2652 */ 2653 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2654 2655 /* Most ATAPI devices which honor transfer chunk size don't 2656 * behave according to the spec when odd chunk size which 2657 * matches the transfer length is specified. If the number of 2658 * bytes to transfer is 2n+1. According to the spec, what 2659 * should happen is to indicate that 2n+1 is going to be 2660 * transferred and transfer 2n+2 bytes where the last byte is 2661 * padding. 2662 * 2663 * In practice, this doesn't happen. ATAPI devices first 2664 * indicate and transfer 2n bytes and then indicate and 2665 * transfer 2 bytes where the last byte is padding. 2666 * 2667 * This inconsistency confuses several controllers which 2668 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2669 * These controllers use actual number of transferred bytes to 2670 * update DMA pointer and transfer of 4n+2 bytes make those 2671 * controller push DMA pointer by 4n+4 bytes because SATA data 2672 * FISes are aligned to 4 bytes. This causes data corruption 2673 * and buffer overrun. 2674 * 2675 * Always setting nbytes to even number solves this problem 2676 * because then ATAPI devices don't have to split data at 2n 2677 * boundaries. 2678 */ 2679 if (nbytes & 0x1) 2680 nbytes++; 2681 2682 qc->tf.lbam = (nbytes & 0xFF); 2683 qc->tf.lbah = (nbytes >> 8); 2684 2685 if (nodata) 2686 qc->tf.protocol = ATAPI_PROT_NODATA; 2687 else if (using_pio) 2688 qc->tf.protocol = ATAPI_PROT_PIO; 2689 else { 2690 /* DMA data xfer */ 2691 qc->tf.protocol = ATAPI_PROT_DMA; 2692 qc->tf.feature |= ATAPI_PKT_DMA; 2693 2694 if ((dev->flags & ATA_DFLAG_DMADIR) && 2695 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2696 /* some SATA bridges need us to indicate data xfer direction */ 2697 qc->tf.feature |= ATAPI_DMADIR; 2698 } 2699 2700 2701 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2702 as ATAPI tape drives don't get this right otherwise */ 2703 return 0; 2704 } 2705 2706 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2707 { 2708 if (!sata_pmp_attached(ap)) { 2709 if (likely(devno >= 0 && 2710 devno < ata_link_max_devices(&ap->link))) 2711 return &ap->link.device[devno]; 2712 } else { 2713 if (likely(devno >= 0 && 2714 devno < ap->nr_pmp_links)) 2715 return &ap->pmp_link[devno].device[0]; 2716 } 2717 2718 return NULL; 2719 } 2720 2721 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2722 const struct scsi_device *scsidev) 2723 { 2724 int devno; 2725 2726 /* skip commands not addressed to targets we simulate */ 2727 if (!sata_pmp_attached(ap)) { 2728 if (unlikely(scsidev->channel || scsidev->lun)) 2729 return NULL; 2730 devno = scsidev->id; 2731 } else { 2732 if (unlikely(scsidev->id || scsidev->lun)) 2733 return NULL; 2734 devno = scsidev->channel; 2735 } 2736 2737 return ata_find_dev(ap, devno); 2738 } 2739 2740 /** 2741 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2742 * @ap: ATA port to which the device is attached 2743 * @scsidev: SCSI device from which we derive the ATA device 2744 * 2745 * Given various information provided in struct scsi_cmnd, 2746 * map that onto an ATA bus, and using that mapping 2747 * determine which ata_device is associated with the 2748 * SCSI command to be sent. 2749 * 2750 * LOCKING: 2751 * spin_lock_irqsave(host lock) 2752 * 2753 * RETURNS: 2754 * Associated ATA device, or %NULL if not found. 2755 */ 2756 struct ata_device * 2757 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2758 { 2759 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2760 2761 if (unlikely(!dev || !ata_dev_enabled(dev))) 2762 return NULL; 2763 2764 return dev; 2765 } 2766 2767 /* 2768 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2769 * @byte1: Byte 1 from pass-thru CDB. 2770 * 2771 * RETURNS: 2772 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2773 */ 2774 static u8 2775 ata_scsi_map_proto(u8 byte1) 2776 { 2777 switch((byte1 & 0x1e) >> 1) { 2778 case 3: /* Non-data */ 2779 return ATA_PROT_NODATA; 2780 2781 case 6: /* DMA */ 2782 case 10: /* UDMA Data-in */ 2783 case 11: /* UDMA Data-Out */ 2784 return ATA_PROT_DMA; 2785 2786 case 4: /* PIO Data-in */ 2787 case 5: /* PIO Data-out */ 2788 return ATA_PROT_PIO; 2789 2790 case 12: /* FPDMA */ 2791 return ATA_PROT_NCQ; 2792 2793 case 0: /* Hard Reset */ 2794 case 1: /* SRST */ 2795 case 8: /* Device Diagnostic */ 2796 case 9: /* Device Reset */ 2797 case 7: /* DMA Queued */ 2798 case 15: /* Return Response Info */ 2799 default: /* Reserved */ 2800 break; 2801 } 2802 2803 return ATA_PROT_UNKNOWN; 2804 } 2805 2806 /** 2807 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2808 * @qc: command structure to be initialized 2809 * 2810 * Handles either 12, 16, or 32-byte versions of the CDB. 2811 * 2812 * RETURNS: 2813 * Zero on success, non-zero on failure. 2814 */ 2815 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2816 { 2817 struct ata_taskfile *tf = &(qc->tf); 2818 struct scsi_cmnd *scmd = qc->scsicmd; 2819 struct ata_device *dev = qc->dev; 2820 const u8 *cdb = scmd->cmnd; 2821 u16 fp; 2822 u16 cdb_offset = 0; 2823 2824 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2825 if (cdb[0] == VARIABLE_LENGTH_CMD) 2826 cdb_offset = 9; 2827 2828 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2829 if (tf->protocol == ATA_PROT_UNKNOWN) { 2830 fp = 1; 2831 goto invalid_fld; 2832 } 2833 2834 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 2835 /* 2836 * When T_LENGTH is zero (No data is transferred), dir should 2837 * be DMA_NONE. 2838 */ 2839 if (scmd->sc_data_direction != DMA_NONE) { 2840 fp = 2 + cdb_offset; 2841 goto invalid_fld; 2842 } 2843 2844 if (ata_is_ncq(tf->protocol)) 2845 tf->protocol = ATA_PROT_NCQ_NODATA; 2846 } 2847 2848 /* enable LBA */ 2849 tf->flags |= ATA_TFLAG_LBA; 2850 2851 /* 2852 * 12 and 16 byte CDBs use different offsets to 2853 * provide the various register values. 2854 */ 2855 switch (cdb[0]) { 2856 case ATA_16: 2857 /* 2858 * 16-byte CDB - may contain extended commands. 2859 * 2860 * If that is the case, copy the upper byte register values. 2861 */ 2862 if (cdb[1] & 0x01) { 2863 tf->hob_feature = cdb[3]; 2864 tf->hob_nsect = cdb[5]; 2865 tf->hob_lbal = cdb[7]; 2866 tf->hob_lbam = cdb[9]; 2867 tf->hob_lbah = cdb[11]; 2868 tf->flags |= ATA_TFLAG_LBA48; 2869 } else 2870 tf->flags &= ~ATA_TFLAG_LBA48; 2871 2872 /* 2873 * Always copy low byte, device and command registers. 2874 */ 2875 tf->feature = cdb[4]; 2876 tf->nsect = cdb[6]; 2877 tf->lbal = cdb[8]; 2878 tf->lbam = cdb[10]; 2879 tf->lbah = cdb[12]; 2880 tf->device = cdb[13]; 2881 tf->command = cdb[14]; 2882 break; 2883 case ATA_12: 2884 /* 2885 * 12-byte CDB - incapable of extended commands. 2886 */ 2887 tf->flags &= ~ATA_TFLAG_LBA48; 2888 2889 tf->feature = cdb[3]; 2890 tf->nsect = cdb[4]; 2891 tf->lbal = cdb[5]; 2892 tf->lbam = cdb[6]; 2893 tf->lbah = cdb[7]; 2894 tf->device = cdb[8]; 2895 tf->command = cdb[9]; 2896 break; 2897 default: 2898 /* 2899 * 32-byte CDB - may contain extended command fields. 2900 * 2901 * If that is the case, copy the upper byte register values. 2902 */ 2903 if (cdb[10] & 0x01) { 2904 tf->hob_feature = cdb[20]; 2905 tf->hob_nsect = cdb[22]; 2906 tf->hob_lbal = cdb[16]; 2907 tf->hob_lbam = cdb[15]; 2908 tf->hob_lbah = cdb[14]; 2909 tf->flags |= ATA_TFLAG_LBA48; 2910 } else 2911 tf->flags &= ~ATA_TFLAG_LBA48; 2912 2913 tf->feature = cdb[21]; 2914 tf->nsect = cdb[23]; 2915 tf->lbal = cdb[19]; 2916 tf->lbam = cdb[18]; 2917 tf->lbah = cdb[17]; 2918 tf->device = cdb[24]; 2919 tf->command = cdb[25]; 2920 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2921 break; 2922 } 2923 2924 /* For NCQ commands copy the tag value */ 2925 if (ata_is_ncq(tf->protocol)) 2926 tf->nsect = qc->hw_tag << 3; 2927 2928 /* enforce correct master/slave bit */ 2929 tf->device = dev->devno ? 2930 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2931 2932 switch (tf->command) { 2933 /* READ/WRITE LONG use a non-standard sect_size */ 2934 case ATA_CMD_READ_LONG: 2935 case ATA_CMD_READ_LONG_ONCE: 2936 case ATA_CMD_WRITE_LONG: 2937 case ATA_CMD_WRITE_LONG_ONCE: 2938 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 2939 fp = 1; 2940 goto invalid_fld; 2941 } 2942 qc->sect_size = scsi_bufflen(scmd); 2943 break; 2944 2945 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2946 case ATA_CMD_CFA_WRITE_NE: 2947 case ATA_CMD_CFA_TRANS_SECT: 2948 case ATA_CMD_CFA_WRITE_MULT_NE: 2949 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2950 case ATA_CMD_READ: 2951 case ATA_CMD_READ_EXT: 2952 case ATA_CMD_READ_QUEUED: 2953 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2954 case ATA_CMD_FPDMA_READ: 2955 case ATA_CMD_READ_MULTI: 2956 case ATA_CMD_READ_MULTI_EXT: 2957 case ATA_CMD_PIO_READ: 2958 case ATA_CMD_PIO_READ_EXT: 2959 case ATA_CMD_READ_STREAM_DMA_EXT: 2960 case ATA_CMD_READ_STREAM_EXT: 2961 case ATA_CMD_VERIFY: 2962 case ATA_CMD_VERIFY_EXT: 2963 case ATA_CMD_WRITE: 2964 case ATA_CMD_WRITE_EXT: 2965 case ATA_CMD_WRITE_FUA_EXT: 2966 case ATA_CMD_WRITE_QUEUED: 2967 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2968 case ATA_CMD_FPDMA_WRITE: 2969 case ATA_CMD_WRITE_MULTI: 2970 case ATA_CMD_WRITE_MULTI_EXT: 2971 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2972 case ATA_CMD_PIO_WRITE: 2973 case ATA_CMD_PIO_WRITE_EXT: 2974 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2975 case ATA_CMD_WRITE_STREAM_EXT: 2976 qc->sect_size = scmd->device->sector_size; 2977 break; 2978 2979 /* Everything else uses 512 byte "sectors" */ 2980 default: 2981 qc->sect_size = ATA_SECT_SIZE; 2982 } 2983 2984 /* 2985 * Set flags so that all registers will be written, pass on 2986 * write indication (used for PIO/DMA setup), result TF is 2987 * copied back and we don't whine too much about its failure. 2988 */ 2989 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2990 if (scmd->sc_data_direction == DMA_TO_DEVICE) 2991 tf->flags |= ATA_TFLAG_WRITE; 2992 2993 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 2994 2995 /* 2996 * Set transfer length. 2997 * 2998 * TODO: find out if we need to do more here to 2999 * cover scatter/gather case. 3000 */ 3001 ata_qc_set_pc_nbytes(qc); 3002 3003 /* We may not issue DMA commands if no DMA mode is set */ 3004 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3005 fp = 1; 3006 goto invalid_fld; 3007 } 3008 3009 /* We may not issue NCQ commands to devices not supporting NCQ */ 3010 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3011 fp = 1; 3012 goto invalid_fld; 3013 } 3014 3015 /* sanity check for pio multi commands */ 3016 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3017 fp = 1; 3018 goto invalid_fld; 3019 } 3020 3021 if (is_multi_taskfile(tf)) { 3022 unsigned int multi_count = 1 << (cdb[1] >> 5); 3023 3024 /* compare the passed through multi_count 3025 * with the cached multi_count of libata 3026 */ 3027 if (multi_count != dev->multi_count) 3028 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3029 multi_count); 3030 } 3031 3032 /* 3033 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3034 * SET_FEATURES - XFER MODE must be preceded/succeeded 3035 * by an update to hardware-specific registers for each 3036 * controller (i.e. the reason for ->set_piomode(), 3037 * ->set_dmamode(), and ->post_set_mode() hooks). 3038 */ 3039 if (tf->command == ATA_CMD_SET_FEATURES && 3040 tf->feature == SETFEATURES_XFER) { 3041 fp = (cdb[0] == ATA_16) ? 4 : 3; 3042 goto invalid_fld; 3043 } 3044 3045 /* 3046 * Filter TPM commands by default. These provide an 3047 * essentially uncontrolled encrypted "back door" between 3048 * applications and the disk. Set libata.allow_tpm=1 if you 3049 * have a real reason for wanting to use them. This ensures 3050 * that installed software cannot easily mess stuff up without 3051 * user intent. DVR type users will probably ship with this enabled 3052 * for movie content management. 3053 * 3054 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3055 * for this and should do in future but that it is not sufficient as 3056 * DCS is an optional feature set. Thus we also do the software filter 3057 * so that we comply with the TC consortium stated goal that the user 3058 * can turn off TC features of their system. 3059 */ 3060 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3061 fp = (cdb[0] == ATA_16) ? 14 : 9; 3062 goto invalid_fld; 3063 } 3064 3065 return 0; 3066 3067 invalid_fld: 3068 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3069 return 1; 3070 } 3071 3072 /** 3073 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3074 * @cmd: SCSI command being translated 3075 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3076 * @sector: Starting sector 3077 * @count: Total Range of request in logical sectors 3078 * 3079 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3080 * descriptor. 3081 * 3082 * Upto 64 entries of the format: 3083 * 63:48 Range Length 3084 * 47:0 LBA 3085 * 3086 * Range Length of 0 is ignored. 3087 * LBA's should be sorted order and not overlap. 3088 * 3089 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3090 * 3091 * Return: Number of bytes copied into sglist. 3092 */ 3093 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3094 u64 sector, u32 count) 3095 { 3096 struct scsi_device *sdp = cmd->device; 3097 size_t len = sdp->sector_size; 3098 size_t r; 3099 __le64 *buf; 3100 u32 i = 0; 3101 unsigned long flags; 3102 3103 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3104 3105 if (len > ATA_SCSI_RBUF_SIZE) 3106 len = ATA_SCSI_RBUF_SIZE; 3107 3108 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3109 buf = ((void *)ata_scsi_rbuf); 3110 memset(buf, 0, len); 3111 while (i < trmax) { 3112 u64 entry = sector | 3113 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3114 buf[i++] = __cpu_to_le64(entry); 3115 if (count <= 0xffff) 3116 break; 3117 count -= 0xffff; 3118 sector += 0xffff; 3119 } 3120 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3121 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3122 3123 return r; 3124 } 3125 3126 /** 3127 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3128 * @qc: Command to be translated 3129 * 3130 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3131 * an SCT Write Same command. 3132 * Based on WRITE SAME has the UNMAP flag: 3133 * 3134 * - When set translate to DSM TRIM 3135 * - When clear translate to SCT Write Same 3136 */ 3137 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3138 { 3139 struct ata_taskfile *tf = &qc->tf; 3140 struct scsi_cmnd *scmd = qc->scsicmd; 3141 struct scsi_device *sdp = scmd->device; 3142 size_t len = sdp->sector_size; 3143 struct ata_device *dev = qc->dev; 3144 const u8 *cdb = scmd->cmnd; 3145 u64 block; 3146 u32 n_block; 3147 const u32 trmax = len >> 3; 3148 u32 size; 3149 u16 fp; 3150 u8 bp = 0xff; 3151 u8 unmap = cdb[1] & 0x8; 3152 3153 /* we may not issue DMA commands if no DMA mode is set */ 3154 if (unlikely(!ata_dma_enabled(dev))) 3155 goto invalid_opcode; 3156 3157 /* 3158 * We only allow sending this command through the block layer, 3159 * as it modifies the DATA OUT buffer, which would corrupt user 3160 * memory for SG_IO commands. 3161 */ 3162 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3163 goto invalid_opcode; 3164 3165 if (unlikely(scmd->cmd_len < 16)) { 3166 fp = 15; 3167 goto invalid_fld; 3168 } 3169 scsi_16_lba_len(cdb, &block, &n_block); 3170 3171 if (!unmap || 3172 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3173 !ata_id_has_trim(dev->id)) { 3174 fp = 1; 3175 bp = 3; 3176 goto invalid_fld; 3177 } 3178 /* If the request is too large the cmd is invalid */ 3179 if (n_block > 0xffff * trmax) { 3180 fp = 2; 3181 goto invalid_fld; 3182 } 3183 3184 /* 3185 * WRITE SAME always has a sector sized buffer as payload, this 3186 * should never be a multiple entry S/G list. 3187 */ 3188 if (!scsi_sg_count(scmd)) 3189 goto invalid_param_len; 3190 3191 /* 3192 * size must match sector size in bytes 3193 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3194 * is defined as number of 512 byte blocks to be transferred. 3195 */ 3196 3197 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3198 if (size != len) 3199 goto invalid_param_len; 3200 3201 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3202 /* Newer devices support queued TRIM commands */ 3203 tf->protocol = ATA_PROT_NCQ; 3204 tf->command = ATA_CMD_FPDMA_SEND; 3205 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3206 tf->nsect = qc->hw_tag << 3; 3207 tf->hob_feature = (size / 512) >> 8; 3208 tf->feature = size / 512; 3209 3210 tf->auxiliary = 1; 3211 } else { 3212 tf->protocol = ATA_PROT_DMA; 3213 tf->hob_feature = 0; 3214 tf->feature = ATA_DSM_TRIM; 3215 tf->hob_nsect = (size / 512) >> 8; 3216 tf->nsect = size / 512; 3217 tf->command = ATA_CMD_DSM; 3218 } 3219 3220 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3221 ATA_TFLAG_WRITE; 3222 3223 ata_qc_set_pc_nbytes(qc); 3224 3225 return 0; 3226 3227 invalid_fld: 3228 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3229 return 1; 3230 invalid_param_len: 3231 /* "Parameter list length error" */ 3232 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3233 return 1; 3234 invalid_opcode: 3235 /* "Invalid command operation code" */ 3236 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3237 return 1; 3238 } 3239 3240 /** 3241 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3242 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3243 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3244 * 3245 * Yields a subset to satisfy scsi_report_opcode() 3246 * 3247 * LOCKING: 3248 * spin_lock_irqsave(host lock) 3249 */ 3250 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3251 { 3252 struct ata_device *dev = args->dev; 3253 u8 *cdb = args->cmd->cmnd; 3254 u8 supported = 0; 3255 unsigned int err = 0; 3256 3257 if (cdb[2] != 1) { 3258 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3259 err = 2; 3260 goto out; 3261 } 3262 switch (cdb[3]) { 3263 case INQUIRY: 3264 case MODE_SENSE: 3265 case MODE_SENSE_10: 3266 case READ_CAPACITY: 3267 case SERVICE_ACTION_IN_16: 3268 case REPORT_LUNS: 3269 case REQUEST_SENSE: 3270 case SYNCHRONIZE_CACHE: 3271 case REZERO_UNIT: 3272 case SEEK_6: 3273 case SEEK_10: 3274 case TEST_UNIT_READY: 3275 case SEND_DIAGNOSTIC: 3276 case MAINTENANCE_IN: 3277 case READ_6: 3278 case READ_10: 3279 case READ_16: 3280 case WRITE_6: 3281 case WRITE_10: 3282 case WRITE_16: 3283 case ATA_12: 3284 case ATA_16: 3285 case VERIFY: 3286 case VERIFY_16: 3287 case MODE_SELECT: 3288 case MODE_SELECT_10: 3289 case START_STOP: 3290 supported = 3; 3291 break; 3292 case ZBC_IN: 3293 case ZBC_OUT: 3294 if (ata_id_zoned_cap(dev->id) || 3295 dev->class == ATA_DEV_ZAC) 3296 supported = 3; 3297 break; 3298 case SECURITY_PROTOCOL_IN: 3299 case SECURITY_PROTOCOL_OUT: 3300 if (dev->flags & ATA_DFLAG_TRUSTED) 3301 supported = 3; 3302 break; 3303 default: 3304 break; 3305 } 3306 out: 3307 rbuf[1] = supported; /* supported */ 3308 return err; 3309 } 3310 3311 /** 3312 * ata_scsi_report_zones_complete - convert ATA output 3313 * @qc: command structure returning the data 3314 * 3315 * Convert T-13 little-endian field representation into 3316 * T-10 big-endian field representation. 3317 * What a mess. 3318 */ 3319 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3320 { 3321 struct scsi_cmnd *scmd = qc->scsicmd; 3322 struct sg_mapping_iter miter; 3323 unsigned long flags; 3324 unsigned int bytes = 0; 3325 3326 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3327 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3328 3329 local_irq_save(flags); 3330 while (sg_miter_next(&miter)) { 3331 unsigned int offset = 0; 3332 3333 if (bytes == 0) { 3334 char *hdr; 3335 u32 list_length; 3336 u64 max_lba, opt_lba; 3337 u16 same; 3338 3339 /* Swizzle header */ 3340 hdr = miter.addr; 3341 list_length = get_unaligned_le32(&hdr[0]); 3342 same = get_unaligned_le16(&hdr[4]); 3343 max_lba = get_unaligned_le64(&hdr[8]); 3344 opt_lba = get_unaligned_le64(&hdr[16]); 3345 put_unaligned_be32(list_length, &hdr[0]); 3346 hdr[4] = same & 0xf; 3347 put_unaligned_be64(max_lba, &hdr[8]); 3348 put_unaligned_be64(opt_lba, &hdr[16]); 3349 offset += 64; 3350 bytes += 64; 3351 } 3352 while (offset < miter.length) { 3353 char *rec; 3354 u8 cond, type, non_seq, reset; 3355 u64 size, start, wp; 3356 3357 /* Swizzle zone descriptor */ 3358 rec = miter.addr + offset; 3359 type = rec[0] & 0xf; 3360 cond = (rec[1] >> 4) & 0xf; 3361 non_seq = (rec[1] & 2); 3362 reset = (rec[1] & 1); 3363 size = get_unaligned_le64(&rec[8]); 3364 start = get_unaligned_le64(&rec[16]); 3365 wp = get_unaligned_le64(&rec[24]); 3366 rec[0] = type; 3367 rec[1] = (cond << 4) | non_seq | reset; 3368 put_unaligned_be64(size, &rec[8]); 3369 put_unaligned_be64(start, &rec[16]); 3370 put_unaligned_be64(wp, &rec[24]); 3371 WARN_ON(offset + 64 > miter.length); 3372 offset += 64; 3373 bytes += 64; 3374 } 3375 } 3376 sg_miter_stop(&miter); 3377 local_irq_restore(flags); 3378 3379 ata_scsi_qc_complete(qc); 3380 } 3381 3382 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3383 { 3384 struct ata_taskfile *tf = &qc->tf; 3385 struct scsi_cmnd *scmd = qc->scsicmd; 3386 const u8 *cdb = scmd->cmnd; 3387 u16 sect, fp = (u16)-1; 3388 u8 sa, options, bp = 0xff; 3389 u64 block; 3390 u32 n_block; 3391 3392 if (unlikely(scmd->cmd_len < 16)) { 3393 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3394 scmd->cmd_len); 3395 fp = 15; 3396 goto invalid_fld; 3397 } 3398 scsi_16_lba_len(cdb, &block, &n_block); 3399 if (n_block != scsi_bufflen(scmd)) { 3400 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3401 n_block, scsi_bufflen(scmd)); 3402 goto invalid_param_len; 3403 } 3404 sa = cdb[1] & 0x1f; 3405 if (sa != ZI_REPORT_ZONES) { 3406 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3407 fp = 1; 3408 goto invalid_fld; 3409 } 3410 /* 3411 * ZAC allows only for transfers in 512 byte blocks, 3412 * and uses a 16 bit value for the transfer count. 3413 */ 3414 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3415 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3416 goto invalid_param_len; 3417 } 3418 sect = n_block / 512; 3419 options = cdb[14] & 0xbf; 3420 3421 if (ata_ncq_enabled(qc->dev) && 3422 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3423 tf->protocol = ATA_PROT_NCQ; 3424 tf->command = ATA_CMD_FPDMA_RECV; 3425 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3426 tf->nsect = qc->hw_tag << 3; 3427 tf->feature = sect & 0xff; 3428 tf->hob_feature = (sect >> 8) & 0xff; 3429 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3430 } else { 3431 tf->command = ATA_CMD_ZAC_MGMT_IN; 3432 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3433 tf->protocol = ATA_PROT_DMA; 3434 tf->hob_feature = options; 3435 tf->hob_nsect = (sect >> 8) & 0xff; 3436 tf->nsect = sect & 0xff; 3437 } 3438 tf->device = ATA_LBA; 3439 tf->lbah = (block >> 16) & 0xff; 3440 tf->lbam = (block >> 8) & 0xff; 3441 tf->lbal = block & 0xff; 3442 tf->hob_lbah = (block >> 40) & 0xff; 3443 tf->hob_lbam = (block >> 32) & 0xff; 3444 tf->hob_lbal = (block >> 24) & 0xff; 3445 3446 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3447 qc->flags |= ATA_QCFLAG_RESULT_TF; 3448 3449 ata_qc_set_pc_nbytes(qc); 3450 3451 qc->complete_fn = ata_scsi_report_zones_complete; 3452 3453 return 0; 3454 3455 invalid_fld: 3456 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3457 return 1; 3458 3459 invalid_param_len: 3460 /* "Parameter list length error" */ 3461 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3462 return 1; 3463 } 3464 3465 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3466 { 3467 struct ata_taskfile *tf = &qc->tf; 3468 struct scsi_cmnd *scmd = qc->scsicmd; 3469 struct ata_device *dev = qc->dev; 3470 const u8 *cdb = scmd->cmnd; 3471 u8 all, sa; 3472 u64 block; 3473 u32 n_block; 3474 u16 fp = (u16)-1; 3475 3476 if (unlikely(scmd->cmd_len < 16)) { 3477 fp = 15; 3478 goto invalid_fld; 3479 } 3480 3481 sa = cdb[1] & 0x1f; 3482 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3483 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3484 fp = 1; 3485 goto invalid_fld; 3486 } 3487 3488 scsi_16_lba_len(cdb, &block, &n_block); 3489 if (n_block) { 3490 /* 3491 * ZAC MANAGEMENT OUT doesn't define any length 3492 */ 3493 goto invalid_param_len; 3494 } 3495 3496 all = cdb[14] & 0x1; 3497 if (all) { 3498 /* 3499 * Ignore the block address (zone ID) as defined by ZBC. 3500 */ 3501 block = 0; 3502 } else if (block >= dev->n_sectors) { 3503 /* 3504 * Block must be a valid zone ID (a zone start LBA). 3505 */ 3506 fp = 2; 3507 goto invalid_fld; 3508 } 3509 3510 if (ata_ncq_enabled(qc->dev) && 3511 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3512 tf->protocol = ATA_PROT_NCQ_NODATA; 3513 tf->command = ATA_CMD_NCQ_NON_DATA; 3514 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3515 tf->nsect = qc->hw_tag << 3; 3516 tf->auxiliary = sa | ((u16)all << 8); 3517 } else { 3518 tf->protocol = ATA_PROT_NODATA; 3519 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3520 tf->feature = sa; 3521 tf->hob_feature = all; 3522 } 3523 tf->lbah = (block >> 16) & 0xff; 3524 tf->lbam = (block >> 8) & 0xff; 3525 tf->lbal = block & 0xff; 3526 tf->hob_lbah = (block >> 40) & 0xff; 3527 tf->hob_lbam = (block >> 32) & 0xff; 3528 tf->hob_lbal = (block >> 24) & 0xff; 3529 tf->device = ATA_LBA; 3530 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3531 3532 return 0; 3533 3534 invalid_fld: 3535 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3536 return 1; 3537 invalid_param_len: 3538 /* "Parameter list length error" */ 3539 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3540 return 1; 3541 } 3542 3543 /** 3544 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3545 * @qc: Storage for translated ATA taskfile 3546 * @buf: input buffer 3547 * @len: number of valid bytes in the input buffer 3548 * @fp: out parameter for the failed field on error 3549 * 3550 * Prepare a taskfile to modify caching information for the device. 3551 * 3552 * LOCKING: 3553 * None. 3554 */ 3555 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3556 const u8 *buf, int len, u16 *fp) 3557 { 3558 struct ata_taskfile *tf = &qc->tf; 3559 struct ata_device *dev = qc->dev; 3560 u8 mpage[CACHE_MPAGE_LEN]; 3561 u8 wce; 3562 int i; 3563 3564 /* 3565 * The first two bytes of def_cache_mpage are a header, so offsets 3566 * in mpage are off by 2 compared to buf. Same for len. 3567 */ 3568 3569 if (len != CACHE_MPAGE_LEN - 2) { 3570 *fp = min(len, CACHE_MPAGE_LEN - 2); 3571 return -EINVAL; 3572 } 3573 3574 wce = buf[0] & (1 << 2); 3575 3576 /* 3577 * Check that read-only bits are not modified. 3578 */ 3579 ata_msense_caching(dev->id, mpage, false); 3580 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3581 if (i == 0) 3582 continue; 3583 if (mpage[i + 2] != buf[i]) { 3584 *fp = i; 3585 return -EINVAL; 3586 } 3587 } 3588 3589 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3590 tf->protocol = ATA_PROT_NODATA; 3591 tf->nsect = 0; 3592 tf->command = ATA_CMD_SET_FEATURES; 3593 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3594 return 0; 3595 } 3596 3597 /** 3598 * ata_mselect_control - Simulate MODE SELECT for control page 3599 * @qc: Storage for translated ATA taskfile 3600 * @buf: input buffer 3601 * @len: number of valid bytes in the input buffer 3602 * @fp: out parameter for the failed field on error 3603 * 3604 * Prepare a taskfile to modify caching information for the device. 3605 * 3606 * LOCKING: 3607 * None. 3608 */ 3609 static int ata_mselect_control(struct ata_queued_cmd *qc, 3610 const u8 *buf, int len, u16 *fp) 3611 { 3612 struct ata_device *dev = qc->dev; 3613 u8 mpage[CONTROL_MPAGE_LEN]; 3614 u8 d_sense; 3615 int i; 3616 3617 /* 3618 * The first two bytes of def_control_mpage are a header, so offsets 3619 * in mpage are off by 2 compared to buf. Same for len. 3620 */ 3621 3622 if (len != CONTROL_MPAGE_LEN - 2) { 3623 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3624 return -EINVAL; 3625 } 3626 3627 d_sense = buf[0] & (1 << 2); 3628 3629 /* 3630 * Check that read-only bits are not modified. 3631 */ 3632 ata_msense_control(dev, mpage, false); 3633 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3634 if (i == 0) 3635 continue; 3636 if (mpage[2 + i] != buf[i]) { 3637 *fp = i; 3638 return -EINVAL; 3639 } 3640 } 3641 if (d_sense & (1 << 2)) 3642 dev->flags |= ATA_DFLAG_D_SENSE; 3643 else 3644 dev->flags &= ~ATA_DFLAG_D_SENSE; 3645 return 0; 3646 } 3647 3648 /** 3649 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3650 * @qc: Storage for translated ATA taskfile 3651 * 3652 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3653 * Assume this is invoked for direct access devices (e.g. disks) only. 3654 * There should be no block descriptor for other device types. 3655 * 3656 * LOCKING: 3657 * spin_lock_irqsave(host lock) 3658 */ 3659 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3660 { 3661 struct scsi_cmnd *scmd = qc->scsicmd; 3662 const u8 *cdb = scmd->cmnd; 3663 u8 pg, spg; 3664 unsigned six_byte, pg_len, hdr_len, bd_len; 3665 int len; 3666 u16 fp = (u16)-1; 3667 u8 bp = 0xff; 3668 u8 buffer[64]; 3669 const u8 *p = buffer; 3670 3671 six_byte = (cdb[0] == MODE_SELECT); 3672 if (six_byte) { 3673 if (scmd->cmd_len < 5) { 3674 fp = 4; 3675 goto invalid_fld; 3676 } 3677 3678 len = cdb[4]; 3679 hdr_len = 4; 3680 } else { 3681 if (scmd->cmd_len < 9) { 3682 fp = 8; 3683 goto invalid_fld; 3684 } 3685 3686 len = get_unaligned_be16(&cdb[7]); 3687 hdr_len = 8; 3688 } 3689 3690 /* We only support PF=1, SP=0. */ 3691 if ((cdb[1] & 0x11) != 0x10) { 3692 fp = 1; 3693 bp = (cdb[1] & 0x01) ? 1 : 5; 3694 goto invalid_fld; 3695 } 3696 3697 /* Test early for possible overrun. */ 3698 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3699 goto invalid_param_len; 3700 3701 /* Move past header and block descriptors. */ 3702 if (len < hdr_len) 3703 goto invalid_param_len; 3704 3705 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3706 buffer, sizeof(buffer))) 3707 goto invalid_param_len; 3708 3709 if (six_byte) 3710 bd_len = p[3]; 3711 else 3712 bd_len = get_unaligned_be16(&p[6]); 3713 3714 len -= hdr_len; 3715 p += hdr_len; 3716 if (len < bd_len) 3717 goto invalid_param_len; 3718 if (bd_len != 0 && bd_len != 8) { 3719 fp = (six_byte) ? 3 : 6; 3720 fp += bd_len + hdr_len; 3721 goto invalid_param; 3722 } 3723 3724 len -= bd_len; 3725 p += bd_len; 3726 if (len == 0) 3727 goto skip; 3728 3729 /* Parse both possible formats for the mode page headers. */ 3730 pg = p[0] & 0x3f; 3731 if (p[0] & 0x40) { 3732 if (len < 4) 3733 goto invalid_param_len; 3734 3735 spg = p[1]; 3736 pg_len = get_unaligned_be16(&p[2]); 3737 p += 4; 3738 len -= 4; 3739 } else { 3740 if (len < 2) 3741 goto invalid_param_len; 3742 3743 spg = 0; 3744 pg_len = p[1]; 3745 p += 2; 3746 len -= 2; 3747 } 3748 3749 /* 3750 * No mode subpages supported (yet) but asking for _all_ 3751 * subpages may be valid 3752 */ 3753 if (spg && (spg != ALL_SUB_MPAGES)) { 3754 fp = (p[0] & 0x40) ? 1 : 0; 3755 fp += hdr_len + bd_len; 3756 goto invalid_param; 3757 } 3758 if (pg_len > len) 3759 goto invalid_param_len; 3760 3761 switch (pg) { 3762 case CACHE_MPAGE: 3763 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3764 fp += hdr_len + bd_len; 3765 goto invalid_param; 3766 } 3767 break; 3768 case CONTROL_MPAGE: 3769 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 3770 fp += hdr_len + bd_len; 3771 goto invalid_param; 3772 } else { 3773 goto skip; /* No ATA command to send */ 3774 } 3775 break; 3776 default: /* invalid page code */ 3777 fp = bd_len + hdr_len; 3778 goto invalid_param; 3779 } 3780 3781 /* 3782 * Only one page has changeable data, so we only support setting one 3783 * page at a time. 3784 */ 3785 if (len > pg_len) 3786 goto invalid_param; 3787 3788 return 0; 3789 3790 invalid_fld: 3791 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3792 return 1; 3793 3794 invalid_param: 3795 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3796 return 1; 3797 3798 invalid_param_len: 3799 /* "Parameter list length error" */ 3800 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3801 return 1; 3802 3803 skip: 3804 scmd->result = SAM_STAT_GOOD; 3805 return 1; 3806 } 3807 3808 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3809 { 3810 if (len == 0) 3811 return ATA_CMD_TRUSTED_NONDATA; 3812 else if (send) 3813 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 3814 else 3815 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 3816 } 3817 3818 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 3819 { 3820 struct scsi_cmnd *scmd = qc->scsicmd; 3821 const u8 *cdb = scmd->cmnd; 3822 struct ata_taskfile *tf = &qc->tf; 3823 u8 secp = cdb[1]; 3824 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 3825 u16 spsp = get_unaligned_be16(&cdb[2]); 3826 u32 len = get_unaligned_be32(&cdb[6]); 3827 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 3828 3829 /* 3830 * We don't support the ATA "security" protocol. 3831 */ 3832 if (secp == 0xef) { 3833 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 3834 return 1; 3835 } 3836 3837 if (cdb[4] & 7) { /* INC_512 */ 3838 if (len > 0xffff) { 3839 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3840 return 1; 3841 } 3842 } else { 3843 if (len > 0x01fffe00) { 3844 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3845 return 1; 3846 } 3847 3848 /* convert to the sector-based ATA addressing */ 3849 len = (len + 511) / 512; 3850 } 3851 3852 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 3853 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 3854 if (send) 3855 tf->flags |= ATA_TFLAG_WRITE; 3856 tf->command = ata_scsi_trusted_op(len, send, dma); 3857 tf->feature = secp; 3858 tf->lbam = spsp & 0xff; 3859 tf->lbah = spsp >> 8; 3860 3861 if (len) { 3862 tf->nsect = len & 0xff; 3863 tf->lbal = len >> 8; 3864 } else { 3865 if (!send) 3866 tf->lbah = (1 << 7); 3867 } 3868 3869 ata_qc_set_pc_nbytes(qc); 3870 return 0; 3871 } 3872 3873 /** 3874 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 3875 * @qc: Command to be translated 3876 * 3877 * Translate a SCSI variable length CDB to specified commands. 3878 * It checks a service action value in CDB to call corresponding handler. 3879 * 3880 * RETURNS: 3881 * Zero on success, non-zero on failure 3882 * 3883 */ 3884 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 3885 { 3886 struct scsi_cmnd *scmd = qc->scsicmd; 3887 const u8 *cdb = scmd->cmnd; 3888 const u16 sa = get_unaligned_be16(&cdb[8]); 3889 3890 /* 3891 * if service action represents a ata pass-thru(32) command, 3892 * then pass it to ata_scsi_pass_thru handler. 3893 */ 3894 if (sa == ATA_32) 3895 return ata_scsi_pass_thru(qc); 3896 3897 /* unsupported service action */ 3898 return 1; 3899 } 3900 3901 /** 3902 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3903 * @dev: ATA device 3904 * @cmd: SCSI command opcode to consider 3905 * 3906 * Look up the SCSI command given, and determine whether the 3907 * SCSI command is to be translated or simulated. 3908 * 3909 * RETURNS: 3910 * Pointer to translation function if possible, %NULL if not. 3911 */ 3912 3913 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3914 { 3915 switch (cmd) { 3916 case READ_6: 3917 case READ_10: 3918 case READ_16: 3919 3920 case WRITE_6: 3921 case WRITE_10: 3922 case WRITE_16: 3923 return ata_scsi_rw_xlat; 3924 3925 case WRITE_SAME_16: 3926 return ata_scsi_write_same_xlat; 3927 3928 case SYNCHRONIZE_CACHE: 3929 if (ata_try_flush_cache(dev)) 3930 return ata_scsi_flush_xlat; 3931 break; 3932 3933 case VERIFY: 3934 case VERIFY_16: 3935 return ata_scsi_verify_xlat; 3936 3937 case ATA_12: 3938 case ATA_16: 3939 return ata_scsi_pass_thru; 3940 3941 case VARIABLE_LENGTH_CMD: 3942 return ata_scsi_var_len_cdb_xlat; 3943 3944 case MODE_SELECT: 3945 case MODE_SELECT_10: 3946 return ata_scsi_mode_select_xlat; 3947 3948 case ZBC_IN: 3949 return ata_scsi_zbc_in_xlat; 3950 3951 case ZBC_OUT: 3952 return ata_scsi_zbc_out_xlat; 3953 3954 case SECURITY_PROTOCOL_IN: 3955 case SECURITY_PROTOCOL_OUT: 3956 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 3957 break; 3958 return ata_scsi_security_inout_xlat; 3959 3960 case START_STOP: 3961 return ata_scsi_start_stop_xlat; 3962 } 3963 3964 return NULL; 3965 } 3966 3967 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 3968 { 3969 u8 scsi_op = scmd->cmnd[0]; 3970 ata_xlat_func_t xlat_func; 3971 3972 if (unlikely(!scmd->cmd_len)) 3973 goto bad_cdb_len; 3974 3975 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 3976 if (unlikely(scmd->cmd_len > dev->cdb_len)) 3977 goto bad_cdb_len; 3978 3979 xlat_func = ata_get_xlat_func(dev, scsi_op); 3980 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3981 /* relay SCSI command to ATAPI device */ 3982 int len = COMMAND_SIZE(scsi_op); 3983 3984 if (unlikely(len > scmd->cmd_len || 3985 len > dev->cdb_len || 3986 scmd->cmd_len > ATAPI_CDB_LEN)) 3987 goto bad_cdb_len; 3988 3989 xlat_func = atapi_xlat; 3990 } else { 3991 /* ATA_16 passthru, treat as an ATA command */ 3992 if (unlikely(scmd->cmd_len > 16)) 3993 goto bad_cdb_len; 3994 3995 xlat_func = ata_get_xlat_func(dev, scsi_op); 3996 } 3997 3998 if (xlat_func) 3999 return ata_scsi_translate(dev, scmd, xlat_func); 4000 4001 ata_scsi_simulate(dev, scmd); 4002 4003 return 0; 4004 4005 bad_cdb_len: 4006 scmd->result = DID_ERROR << 16; 4007 scsi_done(scmd); 4008 return 0; 4009 } 4010 4011 /** 4012 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4013 * @shost: SCSI host of command to be sent 4014 * @cmd: SCSI command to be sent 4015 * 4016 * In some cases, this function translates SCSI commands into 4017 * ATA taskfiles, and queues the taskfiles to be sent to 4018 * hardware. In other cases, this function simulates a 4019 * SCSI device by evaluating and responding to certain 4020 * SCSI commands. This creates the overall effect of 4021 * ATA and ATAPI devices appearing as SCSI devices. 4022 * 4023 * LOCKING: 4024 * ATA host lock 4025 * 4026 * RETURNS: 4027 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4028 * 0 otherwise. 4029 */ 4030 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4031 { 4032 struct ata_port *ap; 4033 struct ata_device *dev; 4034 struct scsi_device *scsidev = cmd->device; 4035 int rc = 0; 4036 unsigned long irq_flags; 4037 4038 ap = ata_shost_to_port(shost); 4039 4040 spin_lock_irqsave(ap->lock, irq_flags); 4041 4042 dev = ata_scsi_find_dev(ap, scsidev); 4043 if (likely(dev)) 4044 rc = __ata_scsi_queuecmd(cmd, dev); 4045 else { 4046 cmd->result = (DID_BAD_TARGET << 16); 4047 scsi_done(cmd); 4048 } 4049 4050 spin_unlock_irqrestore(ap->lock, irq_flags); 4051 4052 return rc; 4053 } 4054 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4055 4056 /** 4057 * ata_scsi_simulate - simulate SCSI command on ATA device 4058 * @dev: the target device 4059 * @cmd: SCSI command being sent to device. 4060 * 4061 * Interprets and directly executes a select list of SCSI commands 4062 * that can be handled internally. 4063 * 4064 * LOCKING: 4065 * spin_lock_irqsave(host lock) 4066 */ 4067 4068 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4069 { 4070 struct ata_scsi_args args; 4071 const u8 *scsicmd = cmd->cmnd; 4072 u8 tmp8; 4073 4074 args.dev = dev; 4075 args.id = dev->id; 4076 args.cmd = cmd; 4077 4078 switch(scsicmd[0]) { 4079 case INQUIRY: 4080 if (scsicmd[1] & 2) /* is CmdDt set? */ 4081 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4082 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4083 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4084 else switch (scsicmd[2]) { 4085 case 0x00: 4086 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4087 break; 4088 case 0x80: 4089 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4090 break; 4091 case 0x83: 4092 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4093 break; 4094 case 0x89: 4095 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4096 break; 4097 case 0xb0: 4098 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4099 break; 4100 case 0xb1: 4101 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4102 break; 4103 case 0xb2: 4104 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4105 break; 4106 case 0xb6: 4107 if (dev->flags & ATA_DFLAG_ZAC) 4108 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4109 else 4110 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4111 break; 4112 case 0xb9: 4113 if (dev->cpr_log) 4114 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4115 else 4116 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4117 break; 4118 default: 4119 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4120 break; 4121 } 4122 break; 4123 4124 case MODE_SENSE: 4125 case MODE_SENSE_10: 4126 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4127 break; 4128 4129 case READ_CAPACITY: 4130 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4131 break; 4132 4133 case SERVICE_ACTION_IN_16: 4134 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4135 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4136 else 4137 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4138 break; 4139 4140 case REPORT_LUNS: 4141 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4142 break; 4143 4144 case REQUEST_SENSE: 4145 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4146 break; 4147 4148 /* if we reach this, then writeback caching is disabled, 4149 * turning this into a no-op. 4150 */ 4151 case SYNCHRONIZE_CACHE: 4152 fallthrough; 4153 4154 /* no-op's, complete with success */ 4155 case REZERO_UNIT: 4156 case SEEK_6: 4157 case SEEK_10: 4158 case TEST_UNIT_READY: 4159 break; 4160 4161 case SEND_DIAGNOSTIC: 4162 tmp8 = scsicmd[1] & ~(1 << 3); 4163 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4164 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4165 break; 4166 4167 case MAINTENANCE_IN: 4168 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4169 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4170 else 4171 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4172 break; 4173 4174 /* all other commands */ 4175 default: 4176 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4177 /* "Invalid command operation code" */ 4178 break; 4179 } 4180 4181 scsi_done(cmd); 4182 } 4183 4184 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4185 { 4186 int i, rc; 4187 4188 for (i = 0; i < host->n_ports; i++) { 4189 struct ata_port *ap = host->ports[i]; 4190 struct Scsi_Host *shost; 4191 4192 rc = -ENOMEM; 4193 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4194 if (!shost) 4195 goto err_alloc; 4196 4197 shost->eh_noresume = 1; 4198 *(struct ata_port **)&shost->hostdata[0] = ap; 4199 ap->scsi_host = shost; 4200 4201 shost->transportt = ata_scsi_transport_template; 4202 shost->unique_id = ap->print_id; 4203 shost->max_id = 16; 4204 shost->max_lun = 1; 4205 shost->max_channel = 1; 4206 shost->max_cmd_len = 32; 4207 4208 /* Schedule policy is determined by ->qc_defer() 4209 * callback and it needs to see every deferred qc. 4210 * Set host_blocked to 1 to prevent SCSI midlayer from 4211 * automatically deferring requests. 4212 */ 4213 shost->max_host_blocked = 1; 4214 4215 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4216 if (rc) 4217 goto err_alloc; 4218 } 4219 4220 return 0; 4221 4222 err_alloc: 4223 while (--i >= 0) { 4224 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4225 4226 /* scsi_host_put() is in ata_devres_release() */ 4227 scsi_remove_host(shost); 4228 } 4229 return rc; 4230 } 4231 4232 #ifdef CONFIG_OF 4233 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4234 { 4235 struct scsi_device *sdev = dev->sdev; 4236 struct device *d = ap->host->dev; 4237 struct device_node *np = d->of_node; 4238 struct device_node *child; 4239 4240 for_each_available_child_of_node(np, child) { 4241 int ret; 4242 u32 val; 4243 4244 ret = of_property_read_u32(child, "reg", &val); 4245 if (ret) 4246 continue; 4247 if (val == dev->devno) { 4248 dev_dbg(d, "found matching device node\n"); 4249 sdev->sdev_gendev.of_node = child; 4250 return; 4251 } 4252 } 4253 } 4254 #else 4255 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4256 { 4257 } 4258 #endif 4259 4260 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4261 { 4262 int tries = 5; 4263 struct ata_device *last_failed_dev = NULL; 4264 struct ata_link *link; 4265 struct ata_device *dev; 4266 4267 repeat: 4268 ata_for_each_link(link, ap, EDGE) { 4269 ata_for_each_dev(dev, link, ENABLED) { 4270 struct scsi_device *sdev; 4271 int channel = 0, id = 0; 4272 4273 if (dev->sdev) 4274 continue; 4275 4276 if (ata_is_host_link(link)) 4277 id = dev->devno; 4278 else 4279 channel = link->pmp; 4280 4281 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4282 NULL); 4283 if (!IS_ERR(sdev)) { 4284 dev->sdev = sdev; 4285 ata_scsi_assign_ofnode(dev, ap); 4286 scsi_device_put(sdev); 4287 } else { 4288 dev->sdev = NULL; 4289 } 4290 } 4291 } 4292 4293 /* If we scanned while EH was in progress or allocation 4294 * failure occurred, scan would have failed silently. Check 4295 * whether all devices are attached. 4296 */ 4297 ata_for_each_link(link, ap, EDGE) { 4298 ata_for_each_dev(dev, link, ENABLED) { 4299 if (!dev->sdev) 4300 goto exit_loop; 4301 } 4302 } 4303 exit_loop: 4304 if (!link) 4305 return; 4306 4307 /* we're missing some SCSI devices */ 4308 if (sync) { 4309 /* If caller requested synchrnous scan && we've made 4310 * any progress, sleep briefly and repeat. 4311 */ 4312 if (dev != last_failed_dev) { 4313 msleep(100); 4314 last_failed_dev = dev; 4315 goto repeat; 4316 } 4317 4318 /* We might be failing to detect boot device, give it 4319 * a few more chances. 4320 */ 4321 if (--tries) { 4322 msleep(100); 4323 goto repeat; 4324 } 4325 4326 ata_port_err(ap, 4327 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4328 } 4329 4330 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4331 round_jiffies_relative(HZ)); 4332 } 4333 4334 /** 4335 * ata_scsi_offline_dev - offline attached SCSI device 4336 * @dev: ATA device to offline attached SCSI device for 4337 * 4338 * This function is called from ata_eh_hotplug() and responsible 4339 * for taking the SCSI device attached to @dev offline. This 4340 * function is called with host lock which protects dev->sdev 4341 * against clearing. 4342 * 4343 * LOCKING: 4344 * spin_lock_irqsave(host lock) 4345 * 4346 * RETURNS: 4347 * 1 if attached SCSI device exists, 0 otherwise. 4348 */ 4349 int ata_scsi_offline_dev(struct ata_device *dev) 4350 { 4351 if (dev->sdev) { 4352 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4353 return 1; 4354 } 4355 return 0; 4356 } 4357 4358 /** 4359 * ata_scsi_remove_dev - remove attached SCSI device 4360 * @dev: ATA device to remove attached SCSI device for 4361 * 4362 * This function is called from ata_eh_scsi_hotplug() and 4363 * responsible for removing the SCSI device attached to @dev. 4364 * 4365 * LOCKING: 4366 * Kernel thread context (may sleep). 4367 */ 4368 static void ata_scsi_remove_dev(struct ata_device *dev) 4369 { 4370 struct ata_port *ap = dev->link->ap; 4371 struct scsi_device *sdev; 4372 unsigned long flags; 4373 4374 /* Alas, we need to grab scan_mutex to ensure SCSI device 4375 * state doesn't change underneath us and thus 4376 * scsi_device_get() always succeeds. The mutex locking can 4377 * be removed if there is __scsi_device_get() interface which 4378 * increments reference counts regardless of device state. 4379 */ 4380 mutex_lock(&ap->scsi_host->scan_mutex); 4381 spin_lock_irqsave(ap->lock, flags); 4382 4383 /* clearing dev->sdev is protected by host lock */ 4384 sdev = dev->sdev; 4385 dev->sdev = NULL; 4386 4387 if (sdev) { 4388 /* If user initiated unplug races with us, sdev can go 4389 * away underneath us after the host lock and 4390 * scan_mutex are released. Hold onto it. 4391 */ 4392 if (scsi_device_get(sdev) == 0) { 4393 /* The following ensures the attached sdev is 4394 * offline on return from ata_scsi_offline_dev() 4395 * regardless it wins or loses the race 4396 * against this function. 4397 */ 4398 scsi_device_set_state(sdev, SDEV_OFFLINE); 4399 } else { 4400 WARN_ON(1); 4401 sdev = NULL; 4402 } 4403 } 4404 4405 spin_unlock_irqrestore(ap->lock, flags); 4406 mutex_unlock(&ap->scsi_host->scan_mutex); 4407 4408 if (sdev) { 4409 ata_dev_info(dev, "detaching (SCSI %s)\n", 4410 dev_name(&sdev->sdev_gendev)); 4411 4412 scsi_remove_device(sdev); 4413 scsi_device_put(sdev); 4414 } 4415 } 4416 4417 static void ata_scsi_handle_link_detach(struct ata_link *link) 4418 { 4419 struct ata_port *ap = link->ap; 4420 struct ata_device *dev; 4421 4422 ata_for_each_dev(dev, link, ALL) { 4423 unsigned long flags; 4424 4425 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4426 continue; 4427 4428 spin_lock_irqsave(ap->lock, flags); 4429 dev->flags &= ~ATA_DFLAG_DETACHED; 4430 spin_unlock_irqrestore(ap->lock, flags); 4431 4432 if (zpodd_dev_enabled(dev)) 4433 zpodd_exit(dev); 4434 4435 ata_scsi_remove_dev(dev); 4436 } 4437 } 4438 4439 /** 4440 * ata_scsi_media_change_notify - send media change event 4441 * @dev: Pointer to the disk device with media change event 4442 * 4443 * Tell the block layer to send a media change notification 4444 * event. 4445 * 4446 * LOCKING: 4447 * spin_lock_irqsave(host lock) 4448 */ 4449 void ata_scsi_media_change_notify(struct ata_device *dev) 4450 { 4451 if (dev->sdev) 4452 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4453 GFP_ATOMIC); 4454 } 4455 4456 /** 4457 * ata_scsi_hotplug - SCSI part of hotplug 4458 * @work: Pointer to ATA port to perform SCSI hotplug on 4459 * 4460 * Perform SCSI part of hotplug. It's executed from a separate 4461 * workqueue after EH completes. This is necessary because SCSI 4462 * hot plugging requires working EH and hot unplugging is 4463 * synchronized with hot plugging with a mutex. 4464 * 4465 * LOCKING: 4466 * Kernel thread context (may sleep). 4467 */ 4468 void ata_scsi_hotplug(struct work_struct *work) 4469 { 4470 struct ata_port *ap = 4471 container_of(work, struct ata_port, hotplug_task.work); 4472 int i; 4473 4474 if (ap->pflags & ATA_PFLAG_UNLOADING) 4475 return; 4476 4477 mutex_lock(&ap->scsi_scan_mutex); 4478 4479 /* Unplug detached devices. We cannot use link iterator here 4480 * because PMP links have to be scanned even if PMP is 4481 * currently not attached. Iterate manually. 4482 */ 4483 ata_scsi_handle_link_detach(&ap->link); 4484 if (ap->pmp_link) 4485 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4486 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4487 4488 /* scan for new ones */ 4489 ata_scsi_scan_host(ap, 0); 4490 4491 mutex_unlock(&ap->scsi_scan_mutex); 4492 } 4493 4494 /** 4495 * ata_scsi_user_scan - indication for user-initiated bus scan 4496 * @shost: SCSI host to scan 4497 * @channel: Channel to scan 4498 * @id: ID to scan 4499 * @lun: LUN to scan 4500 * 4501 * This function is called when user explicitly requests bus 4502 * scan. Set probe pending flag and invoke EH. 4503 * 4504 * LOCKING: 4505 * SCSI layer (we don't care) 4506 * 4507 * RETURNS: 4508 * Zero. 4509 */ 4510 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4511 unsigned int id, u64 lun) 4512 { 4513 struct ata_port *ap = ata_shost_to_port(shost); 4514 unsigned long flags; 4515 int devno, rc = 0; 4516 4517 if (!ap->ops->error_handler) 4518 return -EOPNOTSUPP; 4519 4520 if (lun != SCAN_WILD_CARD && lun) 4521 return -EINVAL; 4522 4523 if (!sata_pmp_attached(ap)) { 4524 if (channel != SCAN_WILD_CARD && channel) 4525 return -EINVAL; 4526 devno = id; 4527 } else { 4528 if (id != SCAN_WILD_CARD && id) 4529 return -EINVAL; 4530 devno = channel; 4531 } 4532 4533 spin_lock_irqsave(ap->lock, flags); 4534 4535 if (devno == SCAN_WILD_CARD) { 4536 struct ata_link *link; 4537 4538 ata_for_each_link(link, ap, EDGE) { 4539 struct ata_eh_info *ehi = &link->eh_info; 4540 ehi->probe_mask |= ATA_ALL_DEVICES; 4541 ehi->action |= ATA_EH_RESET; 4542 } 4543 } else { 4544 struct ata_device *dev = ata_find_dev(ap, devno); 4545 4546 if (dev) { 4547 struct ata_eh_info *ehi = &dev->link->eh_info; 4548 ehi->probe_mask |= 1 << dev->devno; 4549 ehi->action |= ATA_EH_RESET; 4550 } else 4551 rc = -EINVAL; 4552 } 4553 4554 if (rc == 0) { 4555 ata_port_schedule_eh(ap); 4556 spin_unlock_irqrestore(ap->lock, flags); 4557 ata_port_wait_eh(ap); 4558 } else 4559 spin_unlock_irqrestore(ap->lock, flags); 4560 4561 return rc; 4562 } 4563 4564 /** 4565 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4566 * @work: Pointer to ATA port to perform scsi_rescan_device() 4567 * 4568 * After ATA pass thru (SAT) commands are executed successfully, 4569 * libata need to propagate the changes to SCSI layer. 4570 * 4571 * LOCKING: 4572 * Kernel thread context (may sleep). 4573 */ 4574 void ata_scsi_dev_rescan(struct work_struct *work) 4575 { 4576 struct ata_port *ap = 4577 container_of(work, struct ata_port, scsi_rescan_task); 4578 struct ata_link *link; 4579 struct ata_device *dev; 4580 unsigned long flags; 4581 4582 mutex_lock(&ap->scsi_scan_mutex); 4583 spin_lock_irqsave(ap->lock, flags); 4584 4585 ata_for_each_link(link, ap, EDGE) { 4586 ata_for_each_dev(dev, link, ENABLED) { 4587 struct scsi_device *sdev = dev->sdev; 4588 4589 if (!sdev) 4590 continue; 4591 if (scsi_device_get(sdev)) 4592 continue; 4593 4594 spin_unlock_irqrestore(ap->lock, flags); 4595 scsi_rescan_device(&(sdev->sdev_gendev)); 4596 scsi_device_put(sdev); 4597 spin_lock_irqsave(ap->lock, flags); 4598 } 4599 } 4600 4601 spin_unlock_irqrestore(ap->lock, flags); 4602 mutex_unlock(&ap->scsi_scan_mutex); 4603 } 4604