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 int depth = 1; 1059 1060 if (!ata_id_has_unload(dev->id)) 1061 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1062 1063 /* configure max sectors */ 1064 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1065 blk_queue_max_hw_sectors(q, dev->max_sectors); 1066 1067 if (dev->class == ATA_DEV_ATAPI) { 1068 sdev->sector_size = ATA_SECT_SIZE; 1069 1070 /* set DMA padding */ 1071 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1072 1073 /* make room for appending the drain */ 1074 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1075 1076 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1077 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1078 if (!sdev->dma_drain_buf) { 1079 ata_dev_err(dev, "drain buffer allocation failed\n"); 1080 return -ENOMEM; 1081 } 1082 } else { 1083 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1084 sdev->manage_start_stop = 1; 1085 } 1086 1087 /* 1088 * ata_pio_sectors() expects buffer for each sector to not cross 1089 * page boundary. Enforce it by requiring buffers to be sector 1090 * aligned, which works iff sector_size is not larger than 1091 * PAGE_SIZE. ATAPI devices also need the alignment as 1092 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1093 */ 1094 if (sdev->sector_size > PAGE_SIZE) 1095 ata_dev_warn(dev, 1096 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1097 sdev->sector_size); 1098 1099 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1100 1101 if (dev->flags & ATA_DFLAG_AN) 1102 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1103 1104 if (dev->flags & ATA_DFLAG_NCQ) 1105 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1106 depth = min(ATA_MAX_QUEUE, depth); 1107 scsi_change_queue_depth(sdev, depth); 1108 1109 if (dev->flags & ATA_DFLAG_TRUSTED) 1110 sdev->security_supported = 1; 1111 1112 dev->sdev = sdev; 1113 return 0; 1114 } 1115 1116 /** 1117 * ata_scsi_slave_config - Set SCSI device attributes 1118 * @sdev: SCSI device to examine 1119 * 1120 * This is called before we actually start reading 1121 * and writing to the device, to configure certain 1122 * SCSI mid-layer behaviors. 1123 * 1124 * LOCKING: 1125 * Defined by SCSI layer. We don't really care. 1126 */ 1127 1128 int ata_scsi_slave_config(struct scsi_device *sdev) 1129 { 1130 struct ata_port *ap = ata_shost_to_port(sdev->host); 1131 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1132 int rc = 0; 1133 1134 ata_scsi_sdev_config(sdev); 1135 1136 if (dev) 1137 rc = ata_scsi_dev_config(sdev, dev); 1138 1139 return rc; 1140 } 1141 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1142 1143 /** 1144 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1145 * @sdev: SCSI device to be destroyed 1146 * 1147 * @sdev is about to be destroyed for hot/warm unplugging. If 1148 * this unplugging was initiated by libata as indicated by NULL 1149 * dev->sdev, this function doesn't have to do anything. 1150 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1151 * Clear dev->sdev, schedule the device for ATA detach and invoke 1152 * EH. 1153 * 1154 * LOCKING: 1155 * Defined by SCSI layer. We don't really care. 1156 */ 1157 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1158 { 1159 struct ata_port *ap = ata_shost_to_port(sdev->host); 1160 unsigned long flags; 1161 struct ata_device *dev; 1162 1163 if (!ap->ops->error_handler) 1164 return; 1165 1166 spin_lock_irqsave(ap->lock, flags); 1167 dev = __ata_scsi_find_dev(ap, sdev); 1168 if (dev && dev->sdev) { 1169 /* SCSI device already in CANCEL state, no need to offline it */ 1170 dev->sdev = NULL; 1171 dev->flags |= ATA_DFLAG_DETACH; 1172 ata_port_schedule_eh(ap); 1173 } 1174 spin_unlock_irqrestore(ap->lock, flags); 1175 1176 kfree(sdev->dma_drain_buf); 1177 } 1178 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1179 1180 /** 1181 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1182 * @qc: Storage for translated ATA taskfile 1183 * 1184 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1185 * (to start). Perhaps these commands should be preceded by 1186 * CHECK POWER MODE to see what power mode the device is already in. 1187 * [See SAT revision 5 at www.t10.org] 1188 * 1189 * LOCKING: 1190 * spin_lock_irqsave(host lock) 1191 * 1192 * RETURNS: 1193 * Zero on success, non-zero on error. 1194 */ 1195 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1196 { 1197 struct scsi_cmnd *scmd = qc->scsicmd; 1198 struct ata_taskfile *tf = &qc->tf; 1199 const u8 *cdb = scmd->cmnd; 1200 u16 fp; 1201 u8 bp = 0xff; 1202 1203 if (scmd->cmd_len < 5) { 1204 fp = 4; 1205 goto invalid_fld; 1206 } 1207 1208 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1209 tf->protocol = ATA_PROT_NODATA; 1210 if (cdb[1] & 0x1) { 1211 ; /* ignore IMMED bit, violates sat-r05 */ 1212 } 1213 if (cdb[4] & 0x2) { 1214 fp = 4; 1215 bp = 1; 1216 goto invalid_fld; /* LOEJ bit set not supported */ 1217 } 1218 if (((cdb[4] >> 4) & 0xf) != 0) { 1219 fp = 4; 1220 bp = 3; 1221 goto invalid_fld; /* power conditions not supported */ 1222 } 1223 1224 if (cdb[4] & 0x1) { 1225 tf->nsect = 1; /* 1 sector, lba=0 */ 1226 1227 if (qc->dev->flags & ATA_DFLAG_LBA) { 1228 tf->flags |= ATA_TFLAG_LBA; 1229 1230 tf->lbah = 0x0; 1231 tf->lbam = 0x0; 1232 tf->lbal = 0x0; 1233 tf->device |= ATA_LBA; 1234 } else { 1235 /* CHS */ 1236 tf->lbal = 0x1; /* sect */ 1237 tf->lbam = 0x0; /* cyl low */ 1238 tf->lbah = 0x0; /* cyl high */ 1239 } 1240 1241 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1242 } else { 1243 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1244 * or S5) causing some drives to spin up and down again. 1245 */ 1246 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1247 system_state == SYSTEM_POWER_OFF) 1248 goto skip; 1249 1250 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1251 system_entering_hibernation()) 1252 goto skip; 1253 1254 /* Issue ATA STANDBY IMMEDIATE command */ 1255 tf->command = ATA_CMD_STANDBYNOW1; 1256 } 1257 1258 /* 1259 * Standby and Idle condition timers could be implemented but that 1260 * would require libata to implement the Power condition mode page 1261 * and allow the user to change it. Changing mode pages requires 1262 * MODE SELECT to be implemented. 1263 */ 1264 1265 return 0; 1266 1267 invalid_fld: 1268 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1269 return 1; 1270 skip: 1271 scmd->result = SAM_STAT_GOOD; 1272 return 1; 1273 } 1274 1275 1276 /** 1277 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1278 * @qc: Storage for translated ATA taskfile 1279 * 1280 * Sets up an ATA taskfile to issue FLUSH CACHE or 1281 * FLUSH CACHE EXT. 1282 * 1283 * LOCKING: 1284 * spin_lock_irqsave(host lock) 1285 * 1286 * RETURNS: 1287 * Zero on success, non-zero on error. 1288 */ 1289 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1290 { 1291 struct ata_taskfile *tf = &qc->tf; 1292 1293 tf->flags |= ATA_TFLAG_DEVICE; 1294 tf->protocol = ATA_PROT_NODATA; 1295 1296 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1297 tf->command = ATA_CMD_FLUSH_EXT; 1298 else 1299 tf->command = ATA_CMD_FLUSH; 1300 1301 /* flush is critical for IO integrity, consider it an IO command */ 1302 qc->flags |= ATA_QCFLAG_IO; 1303 1304 return 0; 1305 } 1306 1307 /** 1308 * scsi_6_lba_len - Get LBA and transfer length 1309 * @cdb: SCSI command to translate 1310 * 1311 * Calculate LBA and transfer length for 6-byte commands. 1312 * 1313 * RETURNS: 1314 * @plba: the LBA 1315 * @plen: the transfer length 1316 */ 1317 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1318 { 1319 u64 lba = 0; 1320 u32 len; 1321 1322 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1323 lba |= ((u64)cdb[2]) << 8; 1324 lba |= ((u64)cdb[3]); 1325 1326 len = cdb[4]; 1327 1328 *plba = lba; 1329 *plen = len; 1330 } 1331 1332 /** 1333 * scsi_10_lba_len - Get LBA and transfer length 1334 * @cdb: SCSI command to translate 1335 * 1336 * Calculate LBA and transfer length for 10-byte commands. 1337 * 1338 * RETURNS: 1339 * @plba: the LBA 1340 * @plen: the transfer length 1341 */ 1342 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1343 { 1344 *plba = get_unaligned_be32(&cdb[2]); 1345 *plen = get_unaligned_be16(&cdb[7]); 1346 } 1347 1348 /** 1349 * scsi_16_lba_len - Get LBA and transfer length 1350 * @cdb: SCSI command to translate 1351 * 1352 * Calculate LBA and transfer length for 16-byte commands. 1353 * 1354 * RETURNS: 1355 * @plba: the LBA 1356 * @plen: the transfer length 1357 */ 1358 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1359 { 1360 *plba = get_unaligned_be64(&cdb[2]); 1361 *plen = get_unaligned_be32(&cdb[10]); 1362 } 1363 1364 /** 1365 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1366 * @qc: Storage for translated ATA taskfile 1367 * 1368 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1369 * 1370 * LOCKING: 1371 * spin_lock_irqsave(host lock) 1372 * 1373 * RETURNS: 1374 * Zero on success, non-zero on error. 1375 */ 1376 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1377 { 1378 struct scsi_cmnd *scmd = qc->scsicmd; 1379 struct ata_taskfile *tf = &qc->tf; 1380 struct ata_device *dev = qc->dev; 1381 u64 dev_sectors = qc->dev->n_sectors; 1382 const u8 *cdb = scmd->cmnd; 1383 u64 block; 1384 u32 n_block; 1385 u16 fp; 1386 1387 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1388 tf->protocol = ATA_PROT_NODATA; 1389 1390 switch (cdb[0]) { 1391 case VERIFY: 1392 if (scmd->cmd_len < 10) { 1393 fp = 9; 1394 goto invalid_fld; 1395 } 1396 scsi_10_lba_len(cdb, &block, &n_block); 1397 break; 1398 case VERIFY_16: 1399 if (scmd->cmd_len < 16) { 1400 fp = 15; 1401 goto invalid_fld; 1402 } 1403 scsi_16_lba_len(cdb, &block, &n_block); 1404 break; 1405 default: 1406 fp = 0; 1407 goto invalid_fld; 1408 } 1409 1410 if (!n_block) 1411 goto nothing_to_do; 1412 if (block >= dev_sectors) 1413 goto out_of_range; 1414 if ((block + n_block) > dev_sectors) 1415 goto out_of_range; 1416 1417 if (dev->flags & ATA_DFLAG_LBA) { 1418 tf->flags |= ATA_TFLAG_LBA; 1419 1420 if (lba_28_ok(block, n_block)) { 1421 /* use LBA28 */ 1422 tf->command = ATA_CMD_VERIFY; 1423 tf->device |= (block >> 24) & 0xf; 1424 } else if (lba_48_ok(block, n_block)) { 1425 if (!(dev->flags & ATA_DFLAG_LBA48)) 1426 goto out_of_range; 1427 1428 /* use LBA48 */ 1429 tf->flags |= ATA_TFLAG_LBA48; 1430 tf->command = ATA_CMD_VERIFY_EXT; 1431 1432 tf->hob_nsect = (n_block >> 8) & 0xff; 1433 1434 tf->hob_lbah = (block >> 40) & 0xff; 1435 tf->hob_lbam = (block >> 32) & 0xff; 1436 tf->hob_lbal = (block >> 24) & 0xff; 1437 } else 1438 /* request too large even for LBA48 */ 1439 goto out_of_range; 1440 1441 tf->nsect = n_block & 0xff; 1442 1443 tf->lbah = (block >> 16) & 0xff; 1444 tf->lbam = (block >> 8) & 0xff; 1445 tf->lbal = block & 0xff; 1446 1447 tf->device |= ATA_LBA; 1448 } else { 1449 /* CHS */ 1450 u32 sect, head, cyl, track; 1451 1452 if (!lba_28_ok(block, n_block)) 1453 goto out_of_range; 1454 1455 /* Convert LBA to CHS */ 1456 track = (u32)block / dev->sectors; 1457 cyl = track / dev->heads; 1458 head = track % dev->heads; 1459 sect = (u32)block % dev->sectors + 1; 1460 1461 /* Check whether the converted CHS can fit. 1462 Cylinder: 0-65535 1463 Head: 0-15 1464 Sector: 1-255*/ 1465 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1466 goto out_of_range; 1467 1468 tf->command = ATA_CMD_VERIFY; 1469 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1470 tf->lbal = sect; 1471 tf->lbam = cyl; 1472 tf->lbah = cyl >> 8; 1473 tf->device |= head; 1474 } 1475 1476 return 0; 1477 1478 invalid_fld: 1479 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1480 return 1; 1481 1482 out_of_range: 1483 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1484 /* "Logical Block Address out of range" */ 1485 return 1; 1486 1487 nothing_to_do: 1488 scmd->result = SAM_STAT_GOOD; 1489 return 1; 1490 } 1491 1492 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1493 { 1494 struct request *rq = scsi_cmd_to_rq(scmd); 1495 u32 req_blocks; 1496 1497 if (!blk_rq_is_passthrough(rq)) 1498 return true; 1499 1500 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1501 if (n_blocks > req_blocks) 1502 return false; 1503 1504 return true; 1505 } 1506 1507 /** 1508 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1509 * @qc: Storage for translated ATA taskfile 1510 * 1511 * Converts any of six SCSI read/write commands into the 1512 * ATA counterpart, including starting sector (LBA), 1513 * sector count, and taking into account the device's LBA48 1514 * support. 1515 * 1516 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1517 * %WRITE_16 are currently supported. 1518 * 1519 * LOCKING: 1520 * spin_lock_irqsave(host lock) 1521 * 1522 * RETURNS: 1523 * Zero on success, non-zero on error. 1524 */ 1525 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1526 { 1527 struct scsi_cmnd *scmd = qc->scsicmd; 1528 const u8 *cdb = scmd->cmnd; 1529 struct request *rq = scsi_cmd_to_rq(scmd); 1530 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1531 unsigned int tf_flags = 0; 1532 u64 block; 1533 u32 n_block; 1534 int rc; 1535 u16 fp = 0; 1536 1537 switch (cdb[0]) { 1538 case WRITE_6: 1539 case WRITE_10: 1540 case WRITE_16: 1541 tf_flags |= ATA_TFLAG_WRITE; 1542 break; 1543 } 1544 1545 /* Calculate the SCSI LBA, transfer length and FUA. */ 1546 switch (cdb[0]) { 1547 case READ_10: 1548 case WRITE_10: 1549 if (unlikely(scmd->cmd_len < 10)) { 1550 fp = 9; 1551 goto invalid_fld; 1552 } 1553 scsi_10_lba_len(cdb, &block, &n_block); 1554 if (cdb[1] & (1 << 3)) 1555 tf_flags |= ATA_TFLAG_FUA; 1556 if (!ata_check_nblocks(scmd, n_block)) 1557 goto invalid_fld; 1558 break; 1559 case READ_6: 1560 case WRITE_6: 1561 if (unlikely(scmd->cmd_len < 6)) { 1562 fp = 5; 1563 goto invalid_fld; 1564 } 1565 scsi_6_lba_len(cdb, &block, &n_block); 1566 1567 /* for 6-byte r/w commands, transfer length 0 1568 * means 256 blocks of data, not 0 block. 1569 */ 1570 if (!n_block) 1571 n_block = 256; 1572 if (!ata_check_nblocks(scmd, n_block)) 1573 goto invalid_fld; 1574 break; 1575 case READ_16: 1576 case WRITE_16: 1577 if (unlikely(scmd->cmd_len < 16)) { 1578 fp = 15; 1579 goto invalid_fld; 1580 } 1581 scsi_16_lba_len(cdb, &block, &n_block); 1582 if (cdb[1] & (1 << 3)) 1583 tf_flags |= ATA_TFLAG_FUA; 1584 if (!ata_check_nblocks(scmd, n_block)) 1585 goto invalid_fld; 1586 break; 1587 default: 1588 fp = 0; 1589 goto invalid_fld; 1590 } 1591 1592 /* Check and compose ATA command */ 1593 if (!n_block) 1594 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1595 * length 0 means transfer 0 block of data. 1596 * However, for ATA R/W commands, sector count 0 means 1597 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1598 * 1599 * WARNING: one or two older ATA drives treat 0 as 0... 1600 */ 1601 goto nothing_to_do; 1602 1603 qc->flags |= ATA_QCFLAG_IO; 1604 qc->nbytes = n_block * scmd->device->sector_size; 1605 1606 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1607 qc->hw_tag, class); 1608 1609 if (likely(rc == 0)) 1610 return 0; 1611 1612 if (rc == -ERANGE) 1613 goto out_of_range; 1614 /* treat all other errors as -EINVAL, fall through */ 1615 invalid_fld: 1616 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1617 return 1; 1618 1619 out_of_range: 1620 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1621 /* "Logical Block Address out of range" */ 1622 return 1; 1623 1624 nothing_to_do: 1625 scmd->result = SAM_STAT_GOOD; 1626 return 1; 1627 } 1628 1629 static void ata_qc_done(struct ata_queued_cmd *qc) 1630 { 1631 struct scsi_cmnd *cmd = qc->scsicmd; 1632 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1633 1634 ata_qc_free(qc); 1635 done(cmd); 1636 } 1637 1638 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1639 { 1640 struct ata_port *ap = qc->ap; 1641 struct scsi_cmnd *cmd = qc->scsicmd; 1642 u8 *cdb = cmd->cmnd; 1643 int need_sense = (qc->err_mask != 0); 1644 1645 /* For ATA pass thru (SAT) commands, generate a sense block if 1646 * user mandated it or if there's an error. Note that if we 1647 * generate because the user forced us to [CK_COND =1], a check 1648 * condition is generated and the ATA register values are returned 1649 * whether the command completed successfully or not. If there 1650 * was no error, we use the following sense data: 1651 * sk = RECOVERED ERROR 1652 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1653 */ 1654 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1655 ((cdb[2] & 0x20) || need_sense)) 1656 ata_gen_passthru_sense(qc); 1657 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1658 cmd->result = SAM_STAT_CHECK_CONDITION; 1659 else if (need_sense) 1660 ata_gen_ata_sense(qc); 1661 else 1662 cmd->result = SAM_STAT_GOOD; 1663 1664 if (need_sense && !ap->ops->error_handler) 1665 ata_dump_status(ap, &qc->result_tf); 1666 1667 ata_qc_done(qc); 1668 } 1669 1670 /** 1671 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1672 * @dev: ATA device to which the command is addressed 1673 * @cmd: SCSI command to execute 1674 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1675 * 1676 * Our ->queuecommand() function has decided that the SCSI 1677 * command issued can be directly translated into an ATA 1678 * command, rather than handled internally. 1679 * 1680 * This function sets up an ata_queued_cmd structure for the 1681 * SCSI command, and sends that ata_queued_cmd to the hardware. 1682 * 1683 * The xlat_func argument (actor) returns 0 if ready to execute 1684 * ATA command, else 1 to finish translation. If 1 is returned 1685 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1686 * to be set reflecting an error condition or clean (early) 1687 * termination. 1688 * 1689 * LOCKING: 1690 * spin_lock_irqsave(host lock) 1691 * 1692 * RETURNS: 1693 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1694 * needs to be deferred. 1695 */ 1696 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1697 ata_xlat_func_t xlat_func) 1698 { 1699 struct ata_port *ap = dev->link->ap; 1700 struct ata_queued_cmd *qc; 1701 int rc; 1702 1703 qc = ata_scsi_qc_new(dev, cmd); 1704 if (!qc) 1705 goto err_mem; 1706 1707 /* data is present; dma-map it */ 1708 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1709 cmd->sc_data_direction == DMA_TO_DEVICE) { 1710 if (unlikely(scsi_bufflen(cmd) < 1)) { 1711 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1712 goto err_did; 1713 } 1714 1715 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1716 1717 qc->dma_dir = cmd->sc_data_direction; 1718 } 1719 1720 qc->complete_fn = ata_scsi_qc_complete; 1721 1722 if (xlat_func(qc)) 1723 goto early_finish; 1724 1725 if (ap->ops->qc_defer) { 1726 if ((rc = ap->ops->qc_defer(qc))) 1727 goto defer; 1728 } 1729 1730 /* select device, send command to hardware */ 1731 ata_qc_issue(qc); 1732 1733 return 0; 1734 1735 early_finish: 1736 ata_qc_free(qc); 1737 scsi_done(cmd); 1738 return 0; 1739 1740 err_did: 1741 ata_qc_free(qc); 1742 cmd->result = (DID_ERROR << 16); 1743 scsi_done(cmd); 1744 err_mem: 1745 return 0; 1746 1747 defer: 1748 ata_qc_free(qc); 1749 if (rc == ATA_DEFER_LINK) 1750 return SCSI_MLQUEUE_DEVICE_BUSY; 1751 else 1752 return SCSI_MLQUEUE_HOST_BUSY; 1753 } 1754 1755 struct ata_scsi_args { 1756 struct ata_device *dev; 1757 u16 *id; 1758 struct scsi_cmnd *cmd; 1759 }; 1760 1761 /** 1762 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1763 * @args: device IDENTIFY data / SCSI command of interest. 1764 * @actor: Callback hook for desired SCSI command simulator 1765 * 1766 * Takes care of the hard work of simulating a SCSI command... 1767 * Mapping the response buffer, calling the command's handler, 1768 * and handling the handler's return value. This return value 1769 * indicates whether the handler wishes the SCSI command to be 1770 * completed successfully (0), or not (in which case cmd->result 1771 * and sense buffer are assumed to be set). 1772 * 1773 * LOCKING: 1774 * spin_lock_irqsave(host lock) 1775 */ 1776 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1777 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1778 { 1779 unsigned int rc; 1780 struct scsi_cmnd *cmd = args->cmd; 1781 unsigned long flags; 1782 1783 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1784 1785 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1786 rc = actor(args, ata_scsi_rbuf); 1787 if (rc == 0) 1788 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1789 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1790 1791 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1792 1793 if (rc == 0) 1794 cmd->result = SAM_STAT_GOOD; 1795 } 1796 1797 /** 1798 * ata_scsiop_inq_std - Simulate INQUIRY command 1799 * @args: device IDENTIFY data / SCSI command of interest. 1800 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1801 * 1802 * Returns standard device identification data associated 1803 * with non-VPD INQUIRY command output. 1804 * 1805 * LOCKING: 1806 * spin_lock_irqsave(host lock) 1807 */ 1808 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1809 { 1810 static const u8 versions[] = { 1811 0x00, 1812 0x60, /* SAM-3 (no version claimed) */ 1813 1814 0x03, 1815 0x20, /* SBC-2 (no version claimed) */ 1816 1817 0x03, 1818 0x00 /* SPC-3 (no version claimed) */ 1819 }; 1820 static const u8 versions_zbc[] = { 1821 0x00, 1822 0xA0, /* SAM-5 (no version claimed) */ 1823 1824 0x06, 1825 0x00, /* SBC-4 (no version claimed) */ 1826 1827 0x05, 1828 0xC0, /* SPC-5 (no version claimed) */ 1829 1830 0x60, 1831 0x24, /* ZBC r05 */ 1832 }; 1833 1834 u8 hdr[] = { 1835 TYPE_DISK, 1836 0, 1837 0x5, /* claim SPC-3 version compatibility */ 1838 2, 1839 95 - 4, 1840 0, 1841 0, 1842 2 1843 }; 1844 1845 /* set scsi removable (RMB) bit per ata bit, or if the 1846 * AHCI port says it's external (Hotplug-capable, eSATA). 1847 */ 1848 if (ata_id_removable(args->id) || 1849 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1850 hdr[1] |= (1 << 7); 1851 1852 if (args->dev->class == ATA_DEV_ZAC) { 1853 hdr[0] = TYPE_ZBC; 1854 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1855 } 1856 1857 memcpy(rbuf, hdr, sizeof(hdr)); 1858 memcpy(&rbuf[8], "ATA ", 8); 1859 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1860 1861 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1862 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1863 if (strncmp(&rbuf[32], " ", 4) == 0) 1864 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1865 1866 if (rbuf[32] == 0 || rbuf[32] == ' ') 1867 memcpy(&rbuf[32], "n/a ", 4); 1868 1869 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1870 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1871 else 1872 memcpy(rbuf + 58, versions, sizeof(versions)); 1873 1874 return 0; 1875 } 1876 1877 /** 1878 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1879 * @args: device IDENTIFY data / SCSI command of interest. 1880 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1881 * 1882 * Returns list of inquiry VPD pages available. 1883 * 1884 * LOCKING: 1885 * spin_lock_irqsave(host lock) 1886 */ 1887 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1888 { 1889 int i, num_pages = 0; 1890 static const u8 pages[] = { 1891 0x00, /* page 0x00, this page */ 1892 0x80, /* page 0x80, unit serial no page */ 1893 0x83, /* page 0x83, device ident page */ 1894 0x89, /* page 0x89, ata info page */ 1895 0xb0, /* page 0xb0, block limits page */ 1896 0xb1, /* page 0xb1, block device characteristics page */ 1897 0xb2, /* page 0xb2, thin provisioning page */ 1898 0xb6, /* page 0xb6, zoned block device characteristics */ 1899 0xb9, /* page 0xb9, concurrent positioning ranges */ 1900 }; 1901 1902 for (i = 0; i < sizeof(pages); i++) { 1903 if (pages[i] == 0xb6 && 1904 !(args->dev->flags & ATA_DFLAG_ZAC)) 1905 continue; 1906 rbuf[num_pages + 4] = pages[i]; 1907 num_pages++; 1908 } 1909 rbuf[3] = num_pages; /* number of supported VPD pages */ 1910 return 0; 1911 } 1912 1913 /** 1914 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1915 * @args: device IDENTIFY data / SCSI command of interest. 1916 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1917 * 1918 * Returns ATA device serial number. 1919 * 1920 * LOCKING: 1921 * spin_lock_irqsave(host lock) 1922 */ 1923 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1924 { 1925 static const u8 hdr[] = { 1926 0, 1927 0x80, /* this page code */ 1928 0, 1929 ATA_ID_SERNO_LEN, /* page len */ 1930 }; 1931 1932 memcpy(rbuf, hdr, sizeof(hdr)); 1933 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1934 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1935 return 0; 1936 } 1937 1938 /** 1939 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1940 * @args: device IDENTIFY data / SCSI command of interest. 1941 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1942 * 1943 * Yields two logical unit device identification designators: 1944 * - vendor specific ASCII containing the ATA serial number 1945 * - SAT defined "t10 vendor id based" containing ASCII vendor 1946 * name ("ATA "), model and serial numbers. 1947 * 1948 * LOCKING: 1949 * spin_lock_irqsave(host lock) 1950 */ 1951 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 1952 { 1953 const int sat_model_serial_desc_len = 68; 1954 int num; 1955 1956 rbuf[1] = 0x83; /* this page code */ 1957 num = 4; 1958 1959 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1960 rbuf[num + 0] = 2; 1961 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1962 num += 4; 1963 ata_id_string(args->id, (unsigned char *) rbuf + num, 1964 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1965 num += ATA_ID_SERNO_LEN; 1966 1967 /* SAT defined lu model and serial numbers descriptor */ 1968 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 1969 rbuf[num + 0] = 2; 1970 rbuf[num + 1] = 1; 1971 rbuf[num + 3] = sat_model_serial_desc_len; 1972 num += 4; 1973 memcpy(rbuf + num, "ATA ", 8); 1974 num += 8; 1975 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 1976 ATA_ID_PROD_LEN); 1977 num += ATA_ID_PROD_LEN; 1978 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 1979 ATA_ID_SERNO_LEN); 1980 num += ATA_ID_SERNO_LEN; 1981 1982 if (ata_id_has_wwn(args->id)) { 1983 /* SAT defined lu world wide name */ 1984 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 1985 rbuf[num + 0] = 1; 1986 rbuf[num + 1] = 3; 1987 rbuf[num + 3] = ATA_ID_WWN_LEN; 1988 num += 4; 1989 ata_id_string(args->id, (unsigned char *) rbuf + num, 1990 ATA_ID_WWN, ATA_ID_WWN_LEN); 1991 num += ATA_ID_WWN_LEN; 1992 } 1993 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 1994 return 0; 1995 } 1996 1997 /** 1998 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 1999 * @args: device IDENTIFY data / SCSI command of interest. 2000 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2001 * 2002 * Yields SAT-specified ATA VPD page. 2003 * 2004 * LOCKING: 2005 * spin_lock_irqsave(host lock) 2006 */ 2007 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2008 { 2009 rbuf[1] = 0x89; /* our page code */ 2010 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2011 rbuf[3] = (0x238 & 0xff); 2012 2013 memcpy(&rbuf[8], "linux ", 8); 2014 memcpy(&rbuf[16], "libata ", 16); 2015 memcpy(&rbuf[32], DRV_VERSION, 4); 2016 2017 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2018 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2019 /* TODO: PMP? */ 2020 2021 /* we don't store the ATA device signature, so we fake it */ 2022 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2023 rbuf[40] = 0x1; 2024 rbuf[48] = 0x1; 2025 2026 rbuf[56] = ATA_CMD_ID_ATA; 2027 2028 memcpy(&rbuf[60], &args->id[0], 512); 2029 return 0; 2030 } 2031 2032 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2033 { 2034 struct ata_device *dev = args->dev; 2035 u16 min_io_sectors; 2036 2037 rbuf[1] = 0xb0; 2038 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2039 2040 /* 2041 * Optimal transfer length granularity. 2042 * 2043 * This is always one physical block, but for disks with a smaller 2044 * logical than physical sector size we need to figure out what the 2045 * latter is. 2046 */ 2047 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2048 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2049 2050 /* 2051 * Optimal unmap granularity. 2052 * 2053 * The ATA spec doesn't even know about a granularity or alignment 2054 * for the TRIM command. We can leave away most of the unmap related 2055 * VPD page entries, but we have specifify a granularity to signal 2056 * that we support some form of unmap - in thise case via WRITE SAME 2057 * with the unmap bit set. 2058 */ 2059 if (ata_id_has_trim(args->id)) { 2060 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2061 2062 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2063 max_blocks = 128 << (20 - SECTOR_SHIFT); 2064 2065 put_unaligned_be64(max_blocks, &rbuf[36]); 2066 put_unaligned_be32(1, &rbuf[28]); 2067 } 2068 2069 return 0; 2070 } 2071 2072 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2073 { 2074 int form_factor = ata_id_form_factor(args->id); 2075 int media_rotation_rate = ata_id_rotation_rate(args->id); 2076 u8 zoned = ata_id_zoned_cap(args->id); 2077 2078 rbuf[1] = 0xb1; 2079 rbuf[3] = 0x3c; 2080 rbuf[4] = media_rotation_rate >> 8; 2081 rbuf[5] = media_rotation_rate; 2082 rbuf[7] = form_factor; 2083 if (zoned) 2084 rbuf[8] = (zoned << 4); 2085 2086 return 0; 2087 } 2088 2089 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2090 { 2091 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2092 rbuf[1] = 0xb2; 2093 rbuf[3] = 0x4; 2094 rbuf[5] = 1 << 6; /* TPWS */ 2095 2096 return 0; 2097 } 2098 2099 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2100 { 2101 /* 2102 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2103 */ 2104 rbuf[1] = 0xb6; 2105 rbuf[3] = 0x3C; 2106 2107 /* 2108 * URSWRZ bit is only meaningful for host-managed ZAC drives 2109 */ 2110 if (args->dev->zac_zoned_cap & 1) 2111 rbuf[4] |= 1; 2112 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2113 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2114 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2115 2116 return 0; 2117 } 2118 2119 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2120 { 2121 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2122 u8 *desc = &rbuf[64]; 2123 int i; 2124 2125 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2126 rbuf[1] = 0xb9; 2127 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2128 2129 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2130 desc[0] = cpr_log->cpr[i].num; 2131 desc[1] = cpr_log->cpr[i].num_storage_elements; 2132 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2133 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2134 } 2135 2136 return 0; 2137 } 2138 2139 /** 2140 * modecpy - Prepare response for MODE SENSE 2141 * @dest: output buffer 2142 * @src: data being copied 2143 * @n: length of mode page 2144 * @changeable: whether changeable parameters are requested 2145 * 2146 * Generate a generic MODE SENSE page for either current or changeable 2147 * parameters. 2148 * 2149 * LOCKING: 2150 * None. 2151 */ 2152 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2153 { 2154 if (changeable) { 2155 memcpy(dest, src, 2); 2156 memset(dest + 2, 0, n - 2); 2157 } else { 2158 memcpy(dest, src, n); 2159 } 2160 } 2161 2162 /** 2163 * ata_msense_caching - Simulate MODE SENSE caching info page 2164 * @id: device IDENTIFY data 2165 * @buf: output buffer 2166 * @changeable: whether changeable parameters are requested 2167 * 2168 * Generate a caching info page, which conditionally indicates 2169 * write caching to the SCSI layer, depending on device 2170 * capabilities. 2171 * 2172 * LOCKING: 2173 * None. 2174 */ 2175 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2176 { 2177 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2178 if (changeable) { 2179 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2180 } else { 2181 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2182 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2183 } 2184 return sizeof(def_cache_mpage); 2185 } 2186 2187 /** 2188 * ata_msense_control - Simulate MODE SENSE control mode page 2189 * @dev: ATA device of interest 2190 * @buf: output buffer 2191 * @changeable: whether changeable parameters are requested 2192 * 2193 * Generate a generic MODE SENSE control mode page. 2194 * 2195 * LOCKING: 2196 * None. 2197 */ 2198 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2199 bool changeable) 2200 { 2201 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2202 if (changeable) { 2203 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2204 } else { 2205 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2206 2207 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2208 } 2209 return sizeof(def_control_mpage); 2210 } 2211 2212 /** 2213 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2214 * @buf: output buffer 2215 * @changeable: whether changeable parameters are requested 2216 * 2217 * Generate a generic MODE SENSE r/w error recovery page. 2218 * 2219 * LOCKING: 2220 * None. 2221 */ 2222 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2223 { 2224 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2225 changeable); 2226 return sizeof(def_rw_recovery_mpage); 2227 } 2228 2229 /* 2230 * We can turn this into a real blacklist if it's needed, for now just 2231 * blacklist any Maxtor BANC1G10 revision firmware 2232 */ 2233 static int ata_dev_supports_fua(u16 *id) 2234 { 2235 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2236 2237 if (!libata_fua) 2238 return 0; 2239 if (!ata_id_has_fua(id)) 2240 return 0; 2241 2242 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2243 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2244 2245 if (strcmp(model, "Maxtor")) 2246 return 1; 2247 if (strcmp(fw, "BANC1G10")) 2248 return 1; 2249 2250 return 0; /* blacklisted */ 2251 } 2252 2253 /** 2254 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2255 * @args: device IDENTIFY data / SCSI command of interest. 2256 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2257 * 2258 * Simulate MODE SENSE commands. Assume this is invoked for direct 2259 * access devices (e.g. disks) only. There should be no block 2260 * descriptor for other device types. 2261 * 2262 * LOCKING: 2263 * spin_lock_irqsave(host lock) 2264 */ 2265 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2266 { 2267 struct ata_device *dev = args->dev; 2268 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2269 static const u8 sat_blk_desc[] = { 2270 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2271 0, 2272 0, 0x2, 0x0 /* block length: 512 bytes */ 2273 }; 2274 u8 pg, spg; 2275 unsigned int ebd, page_control, six_byte; 2276 u8 dpofua, bp = 0xff; 2277 u16 fp; 2278 2279 six_byte = (scsicmd[0] == MODE_SENSE); 2280 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2281 /* 2282 * LLBA bit in msense(10) ignored (compliant) 2283 */ 2284 2285 page_control = scsicmd[2] >> 6; 2286 switch (page_control) { 2287 case 0: /* current */ 2288 case 1: /* changeable */ 2289 case 2: /* defaults */ 2290 break; /* supported */ 2291 case 3: /* saved */ 2292 goto saving_not_supp; 2293 default: 2294 fp = 2; 2295 bp = 6; 2296 goto invalid_fld; 2297 } 2298 2299 if (six_byte) 2300 p += 4 + (ebd ? 8 : 0); 2301 else 2302 p += 8 + (ebd ? 8 : 0); 2303 2304 pg = scsicmd[2] & 0x3f; 2305 spg = scsicmd[3]; 2306 /* 2307 * No mode subpages supported (yet) but asking for _all_ 2308 * subpages may be valid 2309 */ 2310 if (spg && (spg != ALL_SUB_MPAGES)) { 2311 fp = 3; 2312 goto invalid_fld; 2313 } 2314 2315 switch(pg) { 2316 case RW_RECOVERY_MPAGE: 2317 p += ata_msense_rw_recovery(p, page_control == 1); 2318 break; 2319 2320 case CACHE_MPAGE: 2321 p += ata_msense_caching(args->id, p, page_control == 1); 2322 break; 2323 2324 case CONTROL_MPAGE: 2325 p += ata_msense_control(args->dev, p, page_control == 1); 2326 break; 2327 2328 case ALL_MPAGES: 2329 p += ata_msense_rw_recovery(p, page_control == 1); 2330 p += ata_msense_caching(args->id, p, page_control == 1); 2331 p += ata_msense_control(args->dev, p, page_control == 1); 2332 break; 2333 2334 default: /* invalid page code */ 2335 fp = 2; 2336 goto invalid_fld; 2337 } 2338 2339 dpofua = 0; 2340 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2341 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2342 dpofua = 1 << 4; 2343 2344 if (six_byte) { 2345 rbuf[0] = p - rbuf - 1; 2346 rbuf[2] |= dpofua; 2347 if (ebd) { 2348 rbuf[3] = sizeof(sat_blk_desc); 2349 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2350 } 2351 } else { 2352 unsigned int output_len = p - rbuf - 2; 2353 2354 rbuf[0] = output_len >> 8; 2355 rbuf[1] = output_len; 2356 rbuf[3] |= dpofua; 2357 if (ebd) { 2358 rbuf[7] = sizeof(sat_blk_desc); 2359 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2360 } 2361 } 2362 return 0; 2363 2364 invalid_fld: 2365 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2366 return 1; 2367 2368 saving_not_supp: 2369 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2370 /* "Saving parameters not supported" */ 2371 return 1; 2372 } 2373 2374 /** 2375 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2376 * @args: device IDENTIFY data / SCSI command of interest. 2377 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2378 * 2379 * Simulate READ CAPACITY commands. 2380 * 2381 * LOCKING: 2382 * None. 2383 */ 2384 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2385 { 2386 struct ata_device *dev = args->dev; 2387 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2388 u32 sector_size; /* physical sector size in bytes */ 2389 u8 log2_per_phys; 2390 u16 lowest_aligned; 2391 2392 sector_size = ata_id_logical_sector_size(dev->id); 2393 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2394 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2395 2396 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2397 if (last_lba >= 0xffffffffULL) 2398 last_lba = 0xffffffff; 2399 2400 /* sector count, 32-bit */ 2401 rbuf[0] = last_lba >> (8 * 3); 2402 rbuf[1] = last_lba >> (8 * 2); 2403 rbuf[2] = last_lba >> (8 * 1); 2404 rbuf[3] = last_lba; 2405 2406 /* sector size */ 2407 rbuf[4] = sector_size >> (8 * 3); 2408 rbuf[5] = sector_size >> (8 * 2); 2409 rbuf[6] = sector_size >> (8 * 1); 2410 rbuf[7] = sector_size; 2411 } else { 2412 /* sector count, 64-bit */ 2413 rbuf[0] = last_lba >> (8 * 7); 2414 rbuf[1] = last_lba >> (8 * 6); 2415 rbuf[2] = last_lba >> (8 * 5); 2416 rbuf[3] = last_lba >> (8 * 4); 2417 rbuf[4] = last_lba >> (8 * 3); 2418 rbuf[5] = last_lba >> (8 * 2); 2419 rbuf[6] = last_lba >> (8 * 1); 2420 rbuf[7] = last_lba; 2421 2422 /* sector size */ 2423 rbuf[ 8] = sector_size >> (8 * 3); 2424 rbuf[ 9] = sector_size >> (8 * 2); 2425 rbuf[10] = sector_size >> (8 * 1); 2426 rbuf[11] = sector_size; 2427 2428 rbuf[12] = 0; 2429 rbuf[13] = log2_per_phys; 2430 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2431 rbuf[15] = lowest_aligned; 2432 2433 if (ata_id_has_trim(args->id) && 2434 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2435 rbuf[14] |= 0x80; /* LBPME */ 2436 2437 if (ata_id_has_zero_after_trim(args->id) && 2438 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2439 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2440 rbuf[14] |= 0x40; /* LBPRZ */ 2441 } 2442 } 2443 if (ata_id_zoned_cap(args->id) || 2444 args->dev->class == ATA_DEV_ZAC) 2445 rbuf[12] = (1 << 4); /* RC_BASIS */ 2446 } 2447 return 0; 2448 } 2449 2450 /** 2451 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2452 * @args: device IDENTIFY data / SCSI command of interest. 2453 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2454 * 2455 * Simulate REPORT LUNS command. 2456 * 2457 * LOCKING: 2458 * spin_lock_irqsave(host lock) 2459 */ 2460 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2461 { 2462 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2463 2464 return 0; 2465 } 2466 2467 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2468 { 2469 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2470 /* FIXME: not quite right; we don't want the 2471 * translation of taskfile registers into 2472 * a sense descriptors, since that's only 2473 * correct for ATA, not ATAPI 2474 */ 2475 ata_gen_passthru_sense(qc); 2476 } 2477 2478 ata_qc_done(qc); 2479 } 2480 2481 /* is it pointless to prefer PIO for "safety reasons"? */ 2482 static inline int ata_pio_use_silly(struct ata_port *ap) 2483 { 2484 return (ap->flags & ATA_FLAG_PIO_DMA); 2485 } 2486 2487 static void atapi_request_sense(struct ata_queued_cmd *qc) 2488 { 2489 struct ata_port *ap = qc->ap; 2490 struct scsi_cmnd *cmd = qc->scsicmd; 2491 2492 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2493 2494 #ifdef CONFIG_ATA_SFF 2495 if (ap->ops->sff_tf_read) 2496 ap->ops->sff_tf_read(ap, &qc->tf); 2497 #endif 2498 2499 /* fill these in, for the case where they are -not- overwritten */ 2500 cmd->sense_buffer[0] = 0x70; 2501 cmd->sense_buffer[2] = qc->tf.error >> 4; 2502 2503 ata_qc_reinit(qc); 2504 2505 /* setup sg table and init transfer direction */ 2506 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2507 ata_sg_init(qc, &qc->sgent, 1); 2508 qc->dma_dir = DMA_FROM_DEVICE; 2509 2510 memset(&qc->cdb, 0, qc->dev->cdb_len); 2511 qc->cdb[0] = REQUEST_SENSE; 2512 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2513 2514 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2515 qc->tf.command = ATA_CMD_PACKET; 2516 2517 if (ata_pio_use_silly(ap)) { 2518 qc->tf.protocol = ATAPI_PROT_DMA; 2519 qc->tf.feature |= ATAPI_PKT_DMA; 2520 } else { 2521 qc->tf.protocol = ATAPI_PROT_PIO; 2522 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2523 qc->tf.lbah = 0; 2524 } 2525 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2526 2527 qc->complete_fn = atapi_sense_complete; 2528 2529 ata_qc_issue(qc); 2530 } 2531 2532 /* 2533 * ATAPI devices typically report zero for their SCSI version, and sometimes 2534 * deviate from the spec WRT response data format. If SCSI version is 2535 * reported as zero like normal, then we make the following fixups: 2536 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2537 * modern device. 2538 * 2) Ensure response data format / ATAPI information are always correct. 2539 */ 2540 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2541 { 2542 u8 buf[4]; 2543 2544 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2545 if (buf[2] == 0) { 2546 buf[2] = 0x5; 2547 buf[3] = 0x32; 2548 } 2549 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2550 } 2551 2552 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2553 { 2554 struct scsi_cmnd *cmd = qc->scsicmd; 2555 unsigned int err_mask = qc->err_mask; 2556 2557 /* handle completion from new EH */ 2558 if (unlikely(qc->ap->ops->error_handler && 2559 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2560 2561 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2562 /* FIXME: not quite right; we don't want the 2563 * translation of taskfile registers into a 2564 * sense descriptors, since that's only 2565 * correct for ATA, not ATAPI 2566 */ 2567 ata_gen_passthru_sense(qc); 2568 } 2569 2570 /* SCSI EH automatically locks door if sdev->locked is 2571 * set. Sometimes door lock request continues to 2572 * fail, for example, when no media is present. This 2573 * creates a loop - SCSI EH issues door lock which 2574 * fails and gets invoked again to acquire sense data 2575 * for the failed command. 2576 * 2577 * If door lock fails, always clear sdev->locked to 2578 * avoid this infinite loop. 2579 * 2580 * This may happen before SCSI scan is complete. Make 2581 * sure qc->dev->sdev isn't NULL before dereferencing. 2582 */ 2583 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2584 qc->dev->sdev->locked = 0; 2585 2586 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2587 ata_qc_done(qc); 2588 return; 2589 } 2590 2591 /* successful completion or old EH failure path */ 2592 if (unlikely(err_mask & AC_ERR_DEV)) { 2593 cmd->result = SAM_STAT_CHECK_CONDITION; 2594 atapi_request_sense(qc); 2595 return; 2596 } else if (unlikely(err_mask)) { 2597 /* FIXME: not quite right; we don't want the 2598 * translation of taskfile registers into 2599 * a sense descriptors, since that's only 2600 * correct for ATA, not ATAPI 2601 */ 2602 ata_gen_passthru_sense(qc); 2603 } else { 2604 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2605 atapi_fixup_inquiry(cmd); 2606 cmd->result = SAM_STAT_GOOD; 2607 } 2608 2609 ata_qc_done(qc); 2610 } 2611 /** 2612 * atapi_xlat - Initialize PACKET taskfile 2613 * @qc: command structure to be initialized 2614 * 2615 * LOCKING: 2616 * spin_lock_irqsave(host lock) 2617 * 2618 * RETURNS: 2619 * Zero on success, non-zero on failure. 2620 */ 2621 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2622 { 2623 struct scsi_cmnd *scmd = qc->scsicmd; 2624 struct ata_device *dev = qc->dev; 2625 int nodata = (scmd->sc_data_direction == DMA_NONE); 2626 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2627 unsigned int nbytes; 2628 2629 memset(qc->cdb, 0, dev->cdb_len); 2630 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2631 2632 qc->complete_fn = atapi_qc_complete; 2633 2634 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2635 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2636 qc->tf.flags |= ATA_TFLAG_WRITE; 2637 } 2638 2639 qc->tf.command = ATA_CMD_PACKET; 2640 ata_qc_set_pc_nbytes(qc); 2641 2642 /* check whether ATAPI DMA is safe */ 2643 if (!nodata && !using_pio && atapi_check_dma(qc)) 2644 using_pio = 1; 2645 2646 /* Some controller variants snoop this value for Packet 2647 * transfers to do state machine and FIFO management. Thus we 2648 * want to set it properly, and for DMA where it is 2649 * effectively meaningless. 2650 */ 2651 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2652 2653 /* Most ATAPI devices which honor transfer chunk size don't 2654 * behave according to the spec when odd chunk size which 2655 * matches the transfer length is specified. If the number of 2656 * bytes to transfer is 2n+1. According to the spec, what 2657 * should happen is to indicate that 2n+1 is going to be 2658 * transferred and transfer 2n+2 bytes where the last byte is 2659 * padding. 2660 * 2661 * In practice, this doesn't happen. ATAPI devices first 2662 * indicate and transfer 2n bytes and then indicate and 2663 * transfer 2 bytes where the last byte is padding. 2664 * 2665 * This inconsistency confuses several controllers which 2666 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2667 * These controllers use actual number of transferred bytes to 2668 * update DMA pointer and transfer of 4n+2 bytes make those 2669 * controller push DMA pointer by 4n+4 bytes because SATA data 2670 * FISes are aligned to 4 bytes. This causes data corruption 2671 * and buffer overrun. 2672 * 2673 * Always setting nbytes to even number solves this problem 2674 * because then ATAPI devices don't have to split data at 2n 2675 * boundaries. 2676 */ 2677 if (nbytes & 0x1) 2678 nbytes++; 2679 2680 qc->tf.lbam = (nbytes & 0xFF); 2681 qc->tf.lbah = (nbytes >> 8); 2682 2683 if (nodata) 2684 qc->tf.protocol = ATAPI_PROT_NODATA; 2685 else if (using_pio) 2686 qc->tf.protocol = ATAPI_PROT_PIO; 2687 else { 2688 /* DMA data xfer */ 2689 qc->tf.protocol = ATAPI_PROT_DMA; 2690 qc->tf.feature |= ATAPI_PKT_DMA; 2691 2692 if ((dev->flags & ATA_DFLAG_DMADIR) && 2693 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2694 /* some SATA bridges need us to indicate data xfer direction */ 2695 qc->tf.feature |= ATAPI_DMADIR; 2696 } 2697 2698 2699 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2700 as ATAPI tape drives don't get this right otherwise */ 2701 return 0; 2702 } 2703 2704 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2705 { 2706 if (!sata_pmp_attached(ap)) { 2707 if (likely(devno >= 0 && 2708 devno < ata_link_max_devices(&ap->link))) 2709 return &ap->link.device[devno]; 2710 } else { 2711 if (likely(devno >= 0 && 2712 devno < ap->nr_pmp_links)) 2713 return &ap->pmp_link[devno].device[0]; 2714 } 2715 2716 return NULL; 2717 } 2718 2719 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2720 const struct scsi_device *scsidev) 2721 { 2722 int devno; 2723 2724 /* skip commands not addressed to targets we simulate */ 2725 if (!sata_pmp_attached(ap)) { 2726 if (unlikely(scsidev->channel || scsidev->lun)) 2727 return NULL; 2728 devno = scsidev->id; 2729 } else { 2730 if (unlikely(scsidev->id || scsidev->lun)) 2731 return NULL; 2732 devno = scsidev->channel; 2733 } 2734 2735 return ata_find_dev(ap, devno); 2736 } 2737 2738 /** 2739 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2740 * @ap: ATA port to which the device is attached 2741 * @scsidev: SCSI device from which we derive the ATA device 2742 * 2743 * Given various information provided in struct scsi_cmnd, 2744 * map that onto an ATA bus, and using that mapping 2745 * determine which ata_device is associated with the 2746 * SCSI command to be sent. 2747 * 2748 * LOCKING: 2749 * spin_lock_irqsave(host lock) 2750 * 2751 * RETURNS: 2752 * Associated ATA device, or %NULL if not found. 2753 */ 2754 struct ata_device * 2755 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2756 { 2757 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2758 2759 if (unlikely(!dev || !ata_dev_enabled(dev))) 2760 return NULL; 2761 2762 return dev; 2763 } 2764 2765 /* 2766 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2767 * @byte1: Byte 1 from pass-thru CDB. 2768 * 2769 * RETURNS: 2770 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2771 */ 2772 static u8 2773 ata_scsi_map_proto(u8 byte1) 2774 { 2775 switch((byte1 & 0x1e) >> 1) { 2776 case 3: /* Non-data */ 2777 return ATA_PROT_NODATA; 2778 2779 case 6: /* DMA */ 2780 case 10: /* UDMA Data-in */ 2781 case 11: /* UDMA Data-Out */ 2782 return ATA_PROT_DMA; 2783 2784 case 4: /* PIO Data-in */ 2785 case 5: /* PIO Data-out */ 2786 return ATA_PROT_PIO; 2787 2788 case 12: /* FPDMA */ 2789 return ATA_PROT_NCQ; 2790 2791 case 0: /* Hard Reset */ 2792 case 1: /* SRST */ 2793 case 8: /* Device Diagnostic */ 2794 case 9: /* Device Reset */ 2795 case 7: /* DMA Queued */ 2796 case 15: /* Return Response Info */ 2797 default: /* Reserved */ 2798 break; 2799 } 2800 2801 return ATA_PROT_UNKNOWN; 2802 } 2803 2804 /** 2805 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2806 * @qc: command structure to be initialized 2807 * 2808 * Handles either 12, 16, or 32-byte versions of the CDB. 2809 * 2810 * RETURNS: 2811 * Zero on success, non-zero on failure. 2812 */ 2813 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2814 { 2815 struct ata_taskfile *tf = &(qc->tf); 2816 struct scsi_cmnd *scmd = qc->scsicmd; 2817 struct ata_device *dev = qc->dev; 2818 const u8 *cdb = scmd->cmnd; 2819 u16 fp; 2820 u16 cdb_offset = 0; 2821 2822 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2823 if (cdb[0] == VARIABLE_LENGTH_CMD) 2824 cdb_offset = 9; 2825 2826 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2827 if (tf->protocol == ATA_PROT_UNKNOWN) { 2828 fp = 1; 2829 goto invalid_fld; 2830 } 2831 2832 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 2833 /* 2834 * When T_LENGTH is zero (No data is transferred), dir should 2835 * be DMA_NONE. 2836 */ 2837 if (scmd->sc_data_direction != DMA_NONE) { 2838 fp = 2 + cdb_offset; 2839 goto invalid_fld; 2840 } 2841 2842 if (ata_is_ncq(tf->protocol)) 2843 tf->protocol = ATA_PROT_NCQ_NODATA; 2844 } 2845 2846 /* enable LBA */ 2847 tf->flags |= ATA_TFLAG_LBA; 2848 2849 /* 2850 * 12 and 16 byte CDBs use different offsets to 2851 * provide the various register values. 2852 */ 2853 switch (cdb[0]) { 2854 case ATA_16: 2855 /* 2856 * 16-byte CDB - may contain extended commands. 2857 * 2858 * If that is the case, copy the upper byte register values. 2859 */ 2860 if (cdb[1] & 0x01) { 2861 tf->hob_feature = cdb[3]; 2862 tf->hob_nsect = cdb[5]; 2863 tf->hob_lbal = cdb[7]; 2864 tf->hob_lbam = cdb[9]; 2865 tf->hob_lbah = cdb[11]; 2866 tf->flags |= ATA_TFLAG_LBA48; 2867 } else 2868 tf->flags &= ~ATA_TFLAG_LBA48; 2869 2870 /* 2871 * Always copy low byte, device and command registers. 2872 */ 2873 tf->feature = cdb[4]; 2874 tf->nsect = cdb[6]; 2875 tf->lbal = cdb[8]; 2876 tf->lbam = cdb[10]; 2877 tf->lbah = cdb[12]; 2878 tf->device = cdb[13]; 2879 tf->command = cdb[14]; 2880 break; 2881 case ATA_12: 2882 /* 2883 * 12-byte CDB - incapable of extended commands. 2884 */ 2885 tf->flags &= ~ATA_TFLAG_LBA48; 2886 2887 tf->feature = cdb[3]; 2888 tf->nsect = cdb[4]; 2889 tf->lbal = cdb[5]; 2890 tf->lbam = cdb[6]; 2891 tf->lbah = cdb[7]; 2892 tf->device = cdb[8]; 2893 tf->command = cdb[9]; 2894 break; 2895 default: 2896 /* 2897 * 32-byte CDB - may contain extended command fields. 2898 * 2899 * If that is the case, copy the upper byte register values. 2900 */ 2901 if (cdb[10] & 0x01) { 2902 tf->hob_feature = cdb[20]; 2903 tf->hob_nsect = cdb[22]; 2904 tf->hob_lbal = cdb[16]; 2905 tf->hob_lbam = cdb[15]; 2906 tf->hob_lbah = cdb[14]; 2907 tf->flags |= ATA_TFLAG_LBA48; 2908 } else 2909 tf->flags &= ~ATA_TFLAG_LBA48; 2910 2911 tf->feature = cdb[21]; 2912 tf->nsect = cdb[23]; 2913 tf->lbal = cdb[19]; 2914 tf->lbam = cdb[18]; 2915 tf->lbah = cdb[17]; 2916 tf->device = cdb[24]; 2917 tf->command = cdb[25]; 2918 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2919 break; 2920 } 2921 2922 /* For NCQ commands copy the tag value */ 2923 if (ata_is_ncq(tf->protocol)) 2924 tf->nsect = qc->hw_tag << 3; 2925 2926 /* enforce correct master/slave bit */ 2927 tf->device = dev->devno ? 2928 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2929 2930 switch (tf->command) { 2931 /* READ/WRITE LONG use a non-standard sect_size */ 2932 case ATA_CMD_READ_LONG: 2933 case ATA_CMD_READ_LONG_ONCE: 2934 case ATA_CMD_WRITE_LONG: 2935 case ATA_CMD_WRITE_LONG_ONCE: 2936 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 2937 fp = 1; 2938 goto invalid_fld; 2939 } 2940 qc->sect_size = scsi_bufflen(scmd); 2941 break; 2942 2943 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2944 case ATA_CMD_CFA_WRITE_NE: 2945 case ATA_CMD_CFA_TRANS_SECT: 2946 case ATA_CMD_CFA_WRITE_MULT_NE: 2947 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2948 case ATA_CMD_READ: 2949 case ATA_CMD_READ_EXT: 2950 case ATA_CMD_READ_QUEUED: 2951 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2952 case ATA_CMD_FPDMA_READ: 2953 case ATA_CMD_READ_MULTI: 2954 case ATA_CMD_READ_MULTI_EXT: 2955 case ATA_CMD_PIO_READ: 2956 case ATA_CMD_PIO_READ_EXT: 2957 case ATA_CMD_READ_STREAM_DMA_EXT: 2958 case ATA_CMD_READ_STREAM_EXT: 2959 case ATA_CMD_VERIFY: 2960 case ATA_CMD_VERIFY_EXT: 2961 case ATA_CMD_WRITE: 2962 case ATA_CMD_WRITE_EXT: 2963 case ATA_CMD_WRITE_FUA_EXT: 2964 case ATA_CMD_WRITE_QUEUED: 2965 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2966 case ATA_CMD_FPDMA_WRITE: 2967 case ATA_CMD_WRITE_MULTI: 2968 case ATA_CMD_WRITE_MULTI_EXT: 2969 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2970 case ATA_CMD_PIO_WRITE: 2971 case ATA_CMD_PIO_WRITE_EXT: 2972 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2973 case ATA_CMD_WRITE_STREAM_EXT: 2974 qc->sect_size = scmd->device->sector_size; 2975 break; 2976 2977 /* Everything else uses 512 byte "sectors" */ 2978 default: 2979 qc->sect_size = ATA_SECT_SIZE; 2980 } 2981 2982 /* 2983 * Set flags so that all registers will be written, pass on 2984 * write indication (used for PIO/DMA setup), result TF is 2985 * copied back and we don't whine too much about its failure. 2986 */ 2987 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2988 if (scmd->sc_data_direction == DMA_TO_DEVICE) 2989 tf->flags |= ATA_TFLAG_WRITE; 2990 2991 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 2992 2993 /* 2994 * Set transfer length. 2995 * 2996 * TODO: find out if we need to do more here to 2997 * cover scatter/gather case. 2998 */ 2999 ata_qc_set_pc_nbytes(qc); 3000 3001 /* We may not issue DMA commands if no DMA mode is set */ 3002 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3003 fp = 1; 3004 goto invalid_fld; 3005 } 3006 3007 /* We may not issue NCQ commands to devices not supporting NCQ */ 3008 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3009 fp = 1; 3010 goto invalid_fld; 3011 } 3012 3013 /* sanity check for pio multi commands */ 3014 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3015 fp = 1; 3016 goto invalid_fld; 3017 } 3018 3019 if (is_multi_taskfile(tf)) { 3020 unsigned int multi_count = 1 << (cdb[1] >> 5); 3021 3022 /* compare the passed through multi_count 3023 * with the cached multi_count of libata 3024 */ 3025 if (multi_count != dev->multi_count) 3026 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3027 multi_count); 3028 } 3029 3030 /* 3031 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3032 * SET_FEATURES - XFER MODE must be preceded/succeeded 3033 * by an update to hardware-specific registers for each 3034 * controller (i.e. the reason for ->set_piomode(), 3035 * ->set_dmamode(), and ->post_set_mode() hooks). 3036 */ 3037 if (tf->command == ATA_CMD_SET_FEATURES && 3038 tf->feature == SETFEATURES_XFER) { 3039 fp = (cdb[0] == ATA_16) ? 4 : 3; 3040 goto invalid_fld; 3041 } 3042 3043 /* 3044 * Filter TPM commands by default. These provide an 3045 * essentially uncontrolled encrypted "back door" between 3046 * applications and the disk. Set libata.allow_tpm=1 if you 3047 * have a real reason for wanting to use them. This ensures 3048 * that installed software cannot easily mess stuff up without 3049 * user intent. DVR type users will probably ship with this enabled 3050 * for movie content management. 3051 * 3052 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3053 * for this and should do in future but that it is not sufficient as 3054 * DCS is an optional feature set. Thus we also do the software filter 3055 * so that we comply with the TC consortium stated goal that the user 3056 * can turn off TC features of their system. 3057 */ 3058 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3059 fp = (cdb[0] == ATA_16) ? 14 : 9; 3060 goto invalid_fld; 3061 } 3062 3063 return 0; 3064 3065 invalid_fld: 3066 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3067 return 1; 3068 } 3069 3070 /** 3071 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3072 * @cmd: SCSI command being translated 3073 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3074 * @sector: Starting sector 3075 * @count: Total Range of request in logical sectors 3076 * 3077 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3078 * descriptor. 3079 * 3080 * Upto 64 entries of the format: 3081 * 63:48 Range Length 3082 * 47:0 LBA 3083 * 3084 * Range Length of 0 is ignored. 3085 * LBA's should be sorted order and not overlap. 3086 * 3087 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3088 * 3089 * Return: Number of bytes copied into sglist. 3090 */ 3091 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3092 u64 sector, u32 count) 3093 { 3094 struct scsi_device *sdp = cmd->device; 3095 size_t len = sdp->sector_size; 3096 size_t r; 3097 __le64 *buf; 3098 u32 i = 0; 3099 unsigned long flags; 3100 3101 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3102 3103 if (len > ATA_SCSI_RBUF_SIZE) 3104 len = ATA_SCSI_RBUF_SIZE; 3105 3106 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3107 buf = ((void *)ata_scsi_rbuf); 3108 memset(buf, 0, len); 3109 while (i < trmax) { 3110 u64 entry = sector | 3111 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3112 buf[i++] = __cpu_to_le64(entry); 3113 if (count <= 0xffff) 3114 break; 3115 count -= 0xffff; 3116 sector += 0xffff; 3117 } 3118 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3119 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3120 3121 return r; 3122 } 3123 3124 /** 3125 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3126 * @qc: Command to be translated 3127 * 3128 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3129 * an SCT Write Same command. 3130 * Based on WRITE SAME has the UNMAP flag: 3131 * 3132 * - When set translate to DSM TRIM 3133 * - When clear translate to SCT Write Same 3134 */ 3135 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3136 { 3137 struct ata_taskfile *tf = &qc->tf; 3138 struct scsi_cmnd *scmd = qc->scsicmd; 3139 struct scsi_device *sdp = scmd->device; 3140 size_t len = sdp->sector_size; 3141 struct ata_device *dev = qc->dev; 3142 const u8 *cdb = scmd->cmnd; 3143 u64 block; 3144 u32 n_block; 3145 const u32 trmax = len >> 3; 3146 u32 size; 3147 u16 fp; 3148 u8 bp = 0xff; 3149 u8 unmap = cdb[1] & 0x8; 3150 3151 /* we may not issue DMA commands if no DMA mode is set */ 3152 if (unlikely(!ata_dma_enabled(dev))) 3153 goto invalid_opcode; 3154 3155 /* 3156 * We only allow sending this command through the block layer, 3157 * as it modifies the DATA OUT buffer, which would corrupt user 3158 * memory for SG_IO commands. 3159 */ 3160 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3161 goto invalid_opcode; 3162 3163 if (unlikely(scmd->cmd_len < 16)) { 3164 fp = 15; 3165 goto invalid_fld; 3166 } 3167 scsi_16_lba_len(cdb, &block, &n_block); 3168 3169 if (!unmap || 3170 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3171 !ata_id_has_trim(dev->id)) { 3172 fp = 1; 3173 bp = 3; 3174 goto invalid_fld; 3175 } 3176 /* If the request is too large the cmd is invalid */ 3177 if (n_block > 0xffff * trmax) { 3178 fp = 2; 3179 goto invalid_fld; 3180 } 3181 3182 /* 3183 * WRITE SAME always has a sector sized buffer as payload, this 3184 * should never be a multiple entry S/G list. 3185 */ 3186 if (!scsi_sg_count(scmd)) 3187 goto invalid_param_len; 3188 3189 /* 3190 * size must match sector size in bytes 3191 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3192 * is defined as number of 512 byte blocks to be transferred. 3193 */ 3194 3195 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3196 if (size != len) 3197 goto invalid_param_len; 3198 3199 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3200 /* Newer devices support queued TRIM commands */ 3201 tf->protocol = ATA_PROT_NCQ; 3202 tf->command = ATA_CMD_FPDMA_SEND; 3203 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3204 tf->nsect = qc->hw_tag << 3; 3205 tf->hob_feature = (size / 512) >> 8; 3206 tf->feature = size / 512; 3207 3208 tf->auxiliary = 1; 3209 } else { 3210 tf->protocol = ATA_PROT_DMA; 3211 tf->hob_feature = 0; 3212 tf->feature = ATA_DSM_TRIM; 3213 tf->hob_nsect = (size / 512) >> 8; 3214 tf->nsect = size / 512; 3215 tf->command = ATA_CMD_DSM; 3216 } 3217 3218 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3219 ATA_TFLAG_WRITE; 3220 3221 ata_qc_set_pc_nbytes(qc); 3222 3223 return 0; 3224 3225 invalid_fld: 3226 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3227 return 1; 3228 invalid_param_len: 3229 /* "Parameter list length error" */ 3230 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3231 return 1; 3232 invalid_opcode: 3233 /* "Invalid command operation code" */ 3234 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3235 return 1; 3236 } 3237 3238 /** 3239 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3240 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3241 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3242 * 3243 * Yields a subset to satisfy scsi_report_opcode() 3244 * 3245 * LOCKING: 3246 * spin_lock_irqsave(host lock) 3247 */ 3248 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3249 { 3250 struct ata_device *dev = args->dev; 3251 u8 *cdb = args->cmd->cmnd; 3252 u8 supported = 0; 3253 unsigned int err = 0; 3254 3255 if (cdb[2] != 1) { 3256 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3257 err = 2; 3258 goto out; 3259 } 3260 switch (cdb[3]) { 3261 case INQUIRY: 3262 case MODE_SENSE: 3263 case MODE_SENSE_10: 3264 case READ_CAPACITY: 3265 case SERVICE_ACTION_IN_16: 3266 case REPORT_LUNS: 3267 case REQUEST_SENSE: 3268 case SYNCHRONIZE_CACHE: 3269 case REZERO_UNIT: 3270 case SEEK_6: 3271 case SEEK_10: 3272 case TEST_UNIT_READY: 3273 case SEND_DIAGNOSTIC: 3274 case MAINTENANCE_IN: 3275 case READ_6: 3276 case READ_10: 3277 case READ_16: 3278 case WRITE_6: 3279 case WRITE_10: 3280 case WRITE_16: 3281 case ATA_12: 3282 case ATA_16: 3283 case VERIFY: 3284 case VERIFY_16: 3285 case MODE_SELECT: 3286 case MODE_SELECT_10: 3287 case START_STOP: 3288 supported = 3; 3289 break; 3290 case ZBC_IN: 3291 case ZBC_OUT: 3292 if (ata_id_zoned_cap(dev->id) || 3293 dev->class == ATA_DEV_ZAC) 3294 supported = 3; 3295 break; 3296 case SECURITY_PROTOCOL_IN: 3297 case SECURITY_PROTOCOL_OUT: 3298 if (dev->flags & ATA_DFLAG_TRUSTED) 3299 supported = 3; 3300 break; 3301 default: 3302 break; 3303 } 3304 out: 3305 rbuf[1] = supported; /* supported */ 3306 return err; 3307 } 3308 3309 /** 3310 * ata_scsi_report_zones_complete - convert ATA output 3311 * @qc: command structure returning the data 3312 * 3313 * Convert T-13 little-endian field representation into 3314 * T-10 big-endian field representation. 3315 * What a mess. 3316 */ 3317 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3318 { 3319 struct scsi_cmnd *scmd = qc->scsicmd; 3320 struct sg_mapping_iter miter; 3321 unsigned long flags; 3322 unsigned int bytes = 0; 3323 3324 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3325 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3326 3327 local_irq_save(flags); 3328 while (sg_miter_next(&miter)) { 3329 unsigned int offset = 0; 3330 3331 if (bytes == 0) { 3332 char *hdr; 3333 u32 list_length; 3334 u64 max_lba, opt_lba; 3335 u16 same; 3336 3337 /* Swizzle header */ 3338 hdr = miter.addr; 3339 list_length = get_unaligned_le32(&hdr[0]); 3340 same = get_unaligned_le16(&hdr[4]); 3341 max_lba = get_unaligned_le64(&hdr[8]); 3342 opt_lba = get_unaligned_le64(&hdr[16]); 3343 put_unaligned_be32(list_length, &hdr[0]); 3344 hdr[4] = same & 0xf; 3345 put_unaligned_be64(max_lba, &hdr[8]); 3346 put_unaligned_be64(opt_lba, &hdr[16]); 3347 offset += 64; 3348 bytes += 64; 3349 } 3350 while (offset < miter.length) { 3351 char *rec; 3352 u8 cond, type, non_seq, reset; 3353 u64 size, start, wp; 3354 3355 /* Swizzle zone descriptor */ 3356 rec = miter.addr + offset; 3357 type = rec[0] & 0xf; 3358 cond = (rec[1] >> 4) & 0xf; 3359 non_seq = (rec[1] & 2); 3360 reset = (rec[1] & 1); 3361 size = get_unaligned_le64(&rec[8]); 3362 start = get_unaligned_le64(&rec[16]); 3363 wp = get_unaligned_le64(&rec[24]); 3364 rec[0] = type; 3365 rec[1] = (cond << 4) | non_seq | reset; 3366 put_unaligned_be64(size, &rec[8]); 3367 put_unaligned_be64(start, &rec[16]); 3368 put_unaligned_be64(wp, &rec[24]); 3369 WARN_ON(offset + 64 > miter.length); 3370 offset += 64; 3371 bytes += 64; 3372 } 3373 } 3374 sg_miter_stop(&miter); 3375 local_irq_restore(flags); 3376 3377 ata_scsi_qc_complete(qc); 3378 } 3379 3380 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3381 { 3382 struct ata_taskfile *tf = &qc->tf; 3383 struct scsi_cmnd *scmd = qc->scsicmd; 3384 const u8 *cdb = scmd->cmnd; 3385 u16 sect, fp = (u16)-1; 3386 u8 sa, options, bp = 0xff; 3387 u64 block; 3388 u32 n_block; 3389 3390 if (unlikely(scmd->cmd_len < 16)) { 3391 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3392 scmd->cmd_len); 3393 fp = 15; 3394 goto invalid_fld; 3395 } 3396 scsi_16_lba_len(cdb, &block, &n_block); 3397 if (n_block != scsi_bufflen(scmd)) { 3398 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3399 n_block, scsi_bufflen(scmd)); 3400 goto invalid_param_len; 3401 } 3402 sa = cdb[1] & 0x1f; 3403 if (sa != ZI_REPORT_ZONES) { 3404 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3405 fp = 1; 3406 goto invalid_fld; 3407 } 3408 /* 3409 * ZAC allows only for transfers in 512 byte blocks, 3410 * and uses a 16 bit value for the transfer count. 3411 */ 3412 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3413 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3414 goto invalid_param_len; 3415 } 3416 sect = n_block / 512; 3417 options = cdb[14] & 0xbf; 3418 3419 if (ata_ncq_enabled(qc->dev) && 3420 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3421 tf->protocol = ATA_PROT_NCQ; 3422 tf->command = ATA_CMD_FPDMA_RECV; 3423 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3424 tf->nsect = qc->hw_tag << 3; 3425 tf->feature = sect & 0xff; 3426 tf->hob_feature = (sect >> 8) & 0xff; 3427 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3428 } else { 3429 tf->command = ATA_CMD_ZAC_MGMT_IN; 3430 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3431 tf->protocol = ATA_PROT_DMA; 3432 tf->hob_feature = options; 3433 tf->hob_nsect = (sect >> 8) & 0xff; 3434 tf->nsect = sect & 0xff; 3435 } 3436 tf->device = ATA_LBA; 3437 tf->lbah = (block >> 16) & 0xff; 3438 tf->lbam = (block >> 8) & 0xff; 3439 tf->lbal = block & 0xff; 3440 tf->hob_lbah = (block >> 40) & 0xff; 3441 tf->hob_lbam = (block >> 32) & 0xff; 3442 tf->hob_lbal = (block >> 24) & 0xff; 3443 3444 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3445 qc->flags |= ATA_QCFLAG_RESULT_TF; 3446 3447 ata_qc_set_pc_nbytes(qc); 3448 3449 qc->complete_fn = ata_scsi_report_zones_complete; 3450 3451 return 0; 3452 3453 invalid_fld: 3454 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3455 return 1; 3456 3457 invalid_param_len: 3458 /* "Parameter list length error" */ 3459 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3460 return 1; 3461 } 3462 3463 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3464 { 3465 struct ata_taskfile *tf = &qc->tf; 3466 struct scsi_cmnd *scmd = qc->scsicmd; 3467 struct ata_device *dev = qc->dev; 3468 const u8 *cdb = scmd->cmnd; 3469 u8 all, sa; 3470 u64 block; 3471 u32 n_block; 3472 u16 fp = (u16)-1; 3473 3474 if (unlikely(scmd->cmd_len < 16)) { 3475 fp = 15; 3476 goto invalid_fld; 3477 } 3478 3479 sa = cdb[1] & 0x1f; 3480 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3481 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3482 fp = 1; 3483 goto invalid_fld; 3484 } 3485 3486 scsi_16_lba_len(cdb, &block, &n_block); 3487 if (n_block) { 3488 /* 3489 * ZAC MANAGEMENT OUT doesn't define any length 3490 */ 3491 goto invalid_param_len; 3492 } 3493 3494 all = cdb[14] & 0x1; 3495 if (all) { 3496 /* 3497 * Ignore the block address (zone ID) as defined by ZBC. 3498 */ 3499 block = 0; 3500 } else if (block >= dev->n_sectors) { 3501 /* 3502 * Block must be a valid zone ID (a zone start LBA). 3503 */ 3504 fp = 2; 3505 goto invalid_fld; 3506 } 3507 3508 if (ata_ncq_enabled(qc->dev) && 3509 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3510 tf->protocol = ATA_PROT_NCQ_NODATA; 3511 tf->command = ATA_CMD_NCQ_NON_DATA; 3512 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3513 tf->nsect = qc->hw_tag << 3; 3514 tf->auxiliary = sa | ((u16)all << 8); 3515 } else { 3516 tf->protocol = ATA_PROT_NODATA; 3517 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3518 tf->feature = sa; 3519 tf->hob_feature = all; 3520 } 3521 tf->lbah = (block >> 16) & 0xff; 3522 tf->lbam = (block >> 8) & 0xff; 3523 tf->lbal = block & 0xff; 3524 tf->hob_lbah = (block >> 40) & 0xff; 3525 tf->hob_lbam = (block >> 32) & 0xff; 3526 tf->hob_lbal = (block >> 24) & 0xff; 3527 tf->device = ATA_LBA; 3528 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3529 3530 return 0; 3531 3532 invalid_fld: 3533 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3534 return 1; 3535 invalid_param_len: 3536 /* "Parameter list length error" */ 3537 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3538 return 1; 3539 } 3540 3541 /** 3542 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3543 * @qc: Storage for translated ATA taskfile 3544 * @buf: input buffer 3545 * @len: number of valid bytes in the input buffer 3546 * @fp: out parameter for the failed field on error 3547 * 3548 * Prepare a taskfile to modify caching information for the device. 3549 * 3550 * LOCKING: 3551 * None. 3552 */ 3553 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3554 const u8 *buf, int len, u16 *fp) 3555 { 3556 struct ata_taskfile *tf = &qc->tf; 3557 struct ata_device *dev = qc->dev; 3558 u8 mpage[CACHE_MPAGE_LEN]; 3559 u8 wce; 3560 int i; 3561 3562 /* 3563 * The first two bytes of def_cache_mpage are a header, so offsets 3564 * in mpage are off by 2 compared to buf. Same for len. 3565 */ 3566 3567 if (len != CACHE_MPAGE_LEN - 2) { 3568 *fp = min(len, CACHE_MPAGE_LEN - 2); 3569 return -EINVAL; 3570 } 3571 3572 wce = buf[0] & (1 << 2); 3573 3574 /* 3575 * Check that read-only bits are not modified. 3576 */ 3577 ata_msense_caching(dev->id, mpage, false); 3578 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3579 if (i == 0) 3580 continue; 3581 if (mpage[i + 2] != buf[i]) { 3582 *fp = i; 3583 return -EINVAL; 3584 } 3585 } 3586 3587 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3588 tf->protocol = ATA_PROT_NODATA; 3589 tf->nsect = 0; 3590 tf->command = ATA_CMD_SET_FEATURES; 3591 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3592 return 0; 3593 } 3594 3595 /** 3596 * ata_mselect_control - Simulate MODE SELECT for control page 3597 * @qc: Storage for translated ATA taskfile 3598 * @buf: input buffer 3599 * @len: number of valid bytes in the input buffer 3600 * @fp: out parameter for the failed field on error 3601 * 3602 * Prepare a taskfile to modify caching information for the device. 3603 * 3604 * LOCKING: 3605 * None. 3606 */ 3607 static int ata_mselect_control(struct ata_queued_cmd *qc, 3608 const u8 *buf, int len, u16 *fp) 3609 { 3610 struct ata_device *dev = qc->dev; 3611 u8 mpage[CONTROL_MPAGE_LEN]; 3612 u8 d_sense; 3613 int i; 3614 3615 /* 3616 * The first two bytes of def_control_mpage are a header, so offsets 3617 * in mpage are off by 2 compared to buf. Same for len. 3618 */ 3619 3620 if (len != CONTROL_MPAGE_LEN - 2) { 3621 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3622 return -EINVAL; 3623 } 3624 3625 d_sense = buf[0] & (1 << 2); 3626 3627 /* 3628 * Check that read-only bits are not modified. 3629 */ 3630 ata_msense_control(dev, mpage, false); 3631 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3632 if (i == 0) 3633 continue; 3634 if (mpage[2 + i] != buf[i]) { 3635 *fp = i; 3636 return -EINVAL; 3637 } 3638 } 3639 if (d_sense & (1 << 2)) 3640 dev->flags |= ATA_DFLAG_D_SENSE; 3641 else 3642 dev->flags &= ~ATA_DFLAG_D_SENSE; 3643 return 0; 3644 } 3645 3646 /** 3647 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3648 * @qc: Storage for translated ATA taskfile 3649 * 3650 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3651 * Assume this is invoked for direct access devices (e.g. disks) only. 3652 * There should be no block descriptor for other device types. 3653 * 3654 * LOCKING: 3655 * spin_lock_irqsave(host lock) 3656 */ 3657 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3658 { 3659 struct scsi_cmnd *scmd = qc->scsicmd; 3660 const u8 *cdb = scmd->cmnd; 3661 u8 pg, spg; 3662 unsigned six_byte, pg_len, hdr_len, bd_len; 3663 int len; 3664 u16 fp = (u16)-1; 3665 u8 bp = 0xff; 3666 u8 buffer[64]; 3667 const u8 *p = buffer; 3668 3669 six_byte = (cdb[0] == MODE_SELECT); 3670 if (six_byte) { 3671 if (scmd->cmd_len < 5) { 3672 fp = 4; 3673 goto invalid_fld; 3674 } 3675 3676 len = cdb[4]; 3677 hdr_len = 4; 3678 } else { 3679 if (scmd->cmd_len < 9) { 3680 fp = 8; 3681 goto invalid_fld; 3682 } 3683 3684 len = get_unaligned_be16(&cdb[7]); 3685 hdr_len = 8; 3686 } 3687 3688 /* We only support PF=1, SP=0. */ 3689 if ((cdb[1] & 0x11) != 0x10) { 3690 fp = 1; 3691 bp = (cdb[1] & 0x01) ? 1 : 5; 3692 goto invalid_fld; 3693 } 3694 3695 /* Test early for possible overrun. */ 3696 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3697 goto invalid_param_len; 3698 3699 /* Move past header and block descriptors. */ 3700 if (len < hdr_len) 3701 goto invalid_param_len; 3702 3703 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3704 buffer, sizeof(buffer))) 3705 goto invalid_param_len; 3706 3707 if (six_byte) 3708 bd_len = p[3]; 3709 else 3710 bd_len = get_unaligned_be16(&p[6]); 3711 3712 len -= hdr_len; 3713 p += hdr_len; 3714 if (len < bd_len) 3715 goto invalid_param_len; 3716 if (bd_len != 0 && bd_len != 8) { 3717 fp = (six_byte) ? 3 : 6; 3718 fp += bd_len + hdr_len; 3719 goto invalid_param; 3720 } 3721 3722 len -= bd_len; 3723 p += bd_len; 3724 if (len == 0) 3725 goto skip; 3726 3727 /* Parse both possible formats for the mode page headers. */ 3728 pg = p[0] & 0x3f; 3729 if (p[0] & 0x40) { 3730 if (len < 4) 3731 goto invalid_param_len; 3732 3733 spg = p[1]; 3734 pg_len = get_unaligned_be16(&p[2]); 3735 p += 4; 3736 len -= 4; 3737 } else { 3738 if (len < 2) 3739 goto invalid_param_len; 3740 3741 spg = 0; 3742 pg_len = p[1]; 3743 p += 2; 3744 len -= 2; 3745 } 3746 3747 /* 3748 * No mode subpages supported (yet) but asking for _all_ 3749 * subpages may be valid 3750 */ 3751 if (spg && (spg != ALL_SUB_MPAGES)) { 3752 fp = (p[0] & 0x40) ? 1 : 0; 3753 fp += hdr_len + bd_len; 3754 goto invalid_param; 3755 } 3756 if (pg_len > len) 3757 goto invalid_param_len; 3758 3759 switch (pg) { 3760 case CACHE_MPAGE: 3761 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3762 fp += hdr_len + bd_len; 3763 goto invalid_param; 3764 } 3765 break; 3766 case CONTROL_MPAGE: 3767 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 3768 fp += hdr_len + bd_len; 3769 goto invalid_param; 3770 } else { 3771 goto skip; /* No ATA command to send */ 3772 } 3773 break; 3774 default: /* invalid page code */ 3775 fp = bd_len + hdr_len; 3776 goto invalid_param; 3777 } 3778 3779 /* 3780 * Only one page has changeable data, so we only support setting one 3781 * page at a time. 3782 */ 3783 if (len > pg_len) 3784 goto invalid_param; 3785 3786 return 0; 3787 3788 invalid_fld: 3789 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3790 return 1; 3791 3792 invalid_param: 3793 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3794 return 1; 3795 3796 invalid_param_len: 3797 /* "Parameter list length error" */ 3798 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3799 return 1; 3800 3801 skip: 3802 scmd->result = SAM_STAT_GOOD; 3803 return 1; 3804 } 3805 3806 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3807 { 3808 if (len == 0) 3809 return ATA_CMD_TRUSTED_NONDATA; 3810 else if (send) 3811 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 3812 else 3813 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 3814 } 3815 3816 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 3817 { 3818 struct scsi_cmnd *scmd = qc->scsicmd; 3819 const u8 *cdb = scmd->cmnd; 3820 struct ata_taskfile *tf = &qc->tf; 3821 u8 secp = cdb[1]; 3822 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 3823 u16 spsp = get_unaligned_be16(&cdb[2]); 3824 u32 len = get_unaligned_be32(&cdb[6]); 3825 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 3826 3827 /* 3828 * We don't support the ATA "security" protocol. 3829 */ 3830 if (secp == 0xef) { 3831 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 3832 return 1; 3833 } 3834 3835 if (cdb[4] & 7) { /* INC_512 */ 3836 if (len > 0xffff) { 3837 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3838 return 1; 3839 } 3840 } else { 3841 if (len > 0x01fffe00) { 3842 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3843 return 1; 3844 } 3845 3846 /* convert to the sector-based ATA addressing */ 3847 len = (len + 511) / 512; 3848 } 3849 3850 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 3851 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 3852 if (send) 3853 tf->flags |= ATA_TFLAG_WRITE; 3854 tf->command = ata_scsi_trusted_op(len, send, dma); 3855 tf->feature = secp; 3856 tf->lbam = spsp & 0xff; 3857 tf->lbah = spsp >> 8; 3858 3859 if (len) { 3860 tf->nsect = len & 0xff; 3861 tf->lbal = len >> 8; 3862 } else { 3863 if (!send) 3864 tf->lbah = (1 << 7); 3865 } 3866 3867 ata_qc_set_pc_nbytes(qc); 3868 return 0; 3869 } 3870 3871 /** 3872 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 3873 * @qc: Command to be translated 3874 * 3875 * Translate a SCSI variable length CDB to specified commands. 3876 * It checks a service action value in CDB to call corresponding handler. 3877 * 3878 * RETURNS: 3879 * Zero on success, non-zero on failure 3880 * 3881 */ 3882 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 3883 { 3884 struct scsi_cmnd *scmd = qc->scsicmd; 3885 const u8 *cdb = scmd->cmnd; 3886 const u16 sa = get_unaligned_be16(&cdb[8]); 3887 3888 /* 3889 * if service action represents a ata pass-thru(32) command, 3890 * then pass it to ata_scsi_pass_thru handler. 3891 */ 3892 if (sa == ATA_32) 3893 return ata_scsi_pass_thru(qc); 3894 3895 /* unsupported service action */ 3896 return 1; 3897 } 3898 3899 /** 3900 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3901 * @dev: ATA device 3902 * @cmd: SCSI command opcode to consider 3903 * 3904 * Look up the SCSI command given, and determine whether the 3905 * SCSI command is to be translated or simulated. 3906 * 3907 * RETURNS: 3908 * Pointer to translation function if possible, %NULL if not. 3909 */ 3910 3911 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3912 { 3913 switch (cmd) { 3914 case READ_6: 3915 case READ_10: 3916 case READ_16: 3917 3918 case WRITE_6: 3919 case WRITE_10: 3920 case WRITE_16: 3921 return ata_scsi_rw_xlat; 3922 3923 case WRITE_SAME_16: 3924 return ata_scsi_write_same_xlat; 3925 3926 case SYNCHRONIZE_CACHE: 3927 if (ata_try_flush_cache(dev)) 3928 return ata_scsi_flush_xlat; 3929 break; 3930 3931 case VERIFY: 3932 case VERIFY_16: 3933 return ata_scsi_verify_xlat; 3934 3935 case ATA_12: 3936 case ATA_16: 3937 return ata_scsi_pass_thru; 3938 3939 case VARIABLE_LENGTH_CMD: 3940 return ata_scsi_var_len_cdb_xlat; 3941 3942 case MODE_SELECT: 3943 case MODE_SELECT_10: 3944 return ata_scsi_mode_select_xlat; 3945 3946 case ZBC_IN: 3947 return ata_scsi_zbc_in_xlat; 3948 3949 case ZBC_OUT: 3950 return ata_scsi_zbc_out_xlat; 3951 3952 case SECURITY_PROTOCOL_IN: 3953 case SECURITY_PROTOCOL_OUT: 3954 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 3955 break; 3956 return ata_scsi_security_inout_xlat; 3957 3958 case START_STOP: 3959 return ata_scsi_start_stop_xlat; 3960 } 3961 3962 return NULL; 3963 } 3964 3965 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 3966 { 3967 u8 scsi_op = scmd->cmnd[0]; 3968 ata_xlat_func_t xlat_func; 3969 3970 if (unlikely(!scmd->cmd_len)) 3971 goto bad_cdb_len; 3972 3973 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 3974 if (unlikely(scmd->cmd_len > dev->cdb_len)) 3975 goto bad_cdb_len; 3976 3977 xlat_func = ata_get_xlat_func(dev, scsi_op); 3978 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3979 /* relay SCSI command to ATAPI device */ 3980 int len = COMMAND_SIZE(scsi_op); 3981 3982 if (unlikely(len > scmd->cmd_len || 3983 len > dev->cdb_len || 3984 scmd->cmd_len > ATAPI_CDB_LEN)) 3985 goto bad_cdb_len; 3986 3987 xlat_func = atapi_xlat; 3988 } else { 3989 /* ATA_16 passthru, treat as an ATA command */ 3990 if (unlikely(scmd->cmd_len > 16)) 3991 goto bad_cdb_len; 3992 3993 xlat_func = ata_get_xlat_func(dev, scsi_op); 3994 } 3995 3996 if (xlat_func) 3997 return ata_scsi_translate(dev, scmd, xlat_func); 3998 3999 ata_scsi_simulate(dev, scmd); 4000 4001 return 0; 4002 4003 bad_cdb_len: 4004 scmd->result = DID_ERROR << 16; 4005 scsi_done(scmd); 4006 return 0; 4007 } 4008 4009 /** 4010 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4011 * @shost: SCSI host of command to be sent 4012 * @cmd: SCSI command to be sent 4013 * 4014 * In some cases, this function translates SCSI commands into 4015 * ATA taskfiles, and queues the taskfiles to be sent to 4016 * hardware. In other cases, this function simulates a 4017 * SCSI device by evaluating and responding to certain 4018 * SCSI commands. This creates the overall effect of 4019 * ATA and ATAPI devices appearing as SCSI devices. 4020 * 4021 * LOCKING: 4022 * ATA host lock 4023 * 4024 * RETURNS: 4025 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4026 * 0 otherwise. 4027 */ 4028 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4029 { 4030 struct ata_port *ap; 4031 struct ata_device *dev; 4032 struct scsi_device *scsidev = cmd->device; 4033 int rc = 0; 4034 unsigned long irq_flags; 4035 4036 ap = ata_shost_to_port(shost); 4037 4038 spin_lock_irqsave(ap->lock, irq_flags); 4039 4040 dev = ata_scsi_find_dev(ap, scsidev); 4041 if (likely(dev)) 4042 rc = __ata_scsi_queuecmd(cmd, dev); 4043 else { 4044 cmd->result = (DID_BAD_TARGET << 16); 4045 scsi_done(cmd); 4046 } 4047 4048 spin_unlock_irqrestore(ap->lock, irq_flags); 4049 4050 return rc; 4051 } 4052 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4053 4054 /** 4055 * ata_scsi_simulate - simulate SCSI command on ATA device 4056 * @dev: the target device 4057 * @cmd: SCSI command being sent to device. 4058 * 4059 * Interprets and directly executes a select list of SCSI commands 4060 * that can be handled internally. 4061 * 4062 * LOCKING: 4063 * spin_lock_irqsave(host lock) 4064 */ 4065 4066 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4067 { 4068 struct ata_scsi_args args; 4069 const u8 *scsicmd = cmd->cmnd; 4070 u8 tmp8; 4071 4072 args.dev = dev; 4073 args.id = dev->id; 4074 args.cmd = cmd; 4075 4076 switch(scsicmd[0]) { 4077 case INQUIRY: 4078 if (scsicmd[1] & 2) /* is CmdDt set? */ 4079 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4080 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4081 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4082 else switch (scsicmd[2]) { 4083 case 0x00: 4084 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4085 break; 4086 case 0x80: 4087 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4088 break; 4089 case 0x83: 4090 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4091 break; 4092 case 0x89: 4093 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4094 break; 4095 case 0xb0: 4096 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4097 break; 4098 case 0xb1: 4099 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4100 break; 4101 case 0xb2: 4102 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4103 break; 4104 case 0xb6: 4105 if (dev->flags & ATA_DFLAG_ZAC) 4106 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4107 else 4108 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4109 break; 4110 case 0xb9: 4111 if (dev->cpr_log) 4112 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4113 else 4114 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4115 break; 4116 default: 4117 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4118 break; 4119 } 4120 break; 4121 4122 case MODE_SENSE: 4123 case MODE_SENSE_10: 4124 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4125 break; 4126 4127 case READ_CAPACITY: 4128 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4129 break; 4130 4131 case SERVICE_ACTION_IN_16: 4132 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4133 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4134 else 4135 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4136 break; 4137 4138 case REPORT_LUNS: 4139 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4140 break; 4141 4142 case REQUEST_SENSE: 4143 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4144 break; 4145 4146 /* if we reach this, then writeback caching is disabled, 4147 * turning this into a no-op. 4148 */ 4149 case SYNCHRONIZE_CACHE: 4150 fallthrough; 4151 4152 /* no-op's, complete with success */ 4153 case REZERO_UNIT: 4154 case SEEK_6: 4155 case SEEK_10: 4156 case TEST_UNIT_READY: 4157 break; 4158 4159 case SEND_DIAGNOSTIC: 4160 tmp8 = scsicmd[1] & ~(1 << 3); 4161 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4162 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4163 break; 4164 4165 case MAINTENANCE_IN: 4166 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4167 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4168 else 4169 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4170 break; 4171 4172 /* all other commands */ 4173 default: 4174 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4175 /* "Invalid command operation code" */ 4176 break; 4177 } 4178 4179 scsi_done(cmd); 4180 } 4181 4182 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4183 { 4184 int i, rc; 4185 4186 for (i = 0; i < host->n_ports; i++) { 4187 struct ata_port *ap = host->ports[i]; 4188 struct Scsi_Host *shost; 4189 4190 rc = -ENOMEM; 4191 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4192 if (!shost) 4193 goto err_alloc; 4194 4195 shost->eh_noresume = 1; 4196 *(struct ata_port **)&shost->hostdata[0] = ap; 4197 ap->scsi_host = shost; 4198 4199 shost->transportt = ata_scsi_transport_template; 4200 shost->unique_id = ap->print_id; 4201 shost->max_id = 16; 4202 shost->max_lun = 1; 4203 shost->max_channel = 1; 4204 shost->max_cmd_len = 32; 4205 4206 /* Schedule policy is determined by ->qc_defer() 4207 * callback and it needs to see every deferred qc. 4208 * Set host_blocked to 1 to prevent SCSI midlayer from 4209 * automatically deferring requests. 4210 */ 4211 shost->max_host_blocked = 1; 4212 4213 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4214 if (rc) 4215 goto err_alloc; 4216 } 4217 4218 return 0; 4219 4220 err_alloc: 4221 while (--i >= 0) { 4222 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4223 4224 /* scsi_host_put() is in ata_devres_release() */ 4225 scsi_remove_host(shost); 4226 } 4227 return rc; 4228 } 4229 4230 #ifdef CONFIG_OF 4231 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4232 { 4233 struct scsi_device *sdev = dev->sdev; 4234 struct device *d = ap->host->dev; 4235 struct device_node *np = d->of_node; 4236 struct device_node *child; 4237 4238 for_each_available_child_of_node(np, child) { 4239 int ret; 4240 u32 val; 4241 4242 ret = of_property_read_u32(child, "reg", &val); 4243 if (ret) 4244 continue; 4245 if (val == dev->devno) { 4246 dev_dbg(d, "found matching device node\n"); 4247 sdev->sdev_gendev.of_node = child; 4248 return; 4249 } 4250 } 4251 } 4252 #else 4253 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4254 { 4255 } 4256 #endif 4257 4258 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4259 { 4260 int tries = 5; 4261 struct ata_device *last_failed_dev = NULL; 4262 struct ata_link *link; 4263 struct ata_device *dev; 4264 4265 repeat: 4266 ata_for_each_link(link, ap, EDGE) { 4267 ata_for_each_dev(dev, link, ENABLED) { 4268 struct scsi_device *sdev; 4269 int channel = 0, id = 0; 4270 4271 if (dev->sdev) 4272 continue; 4273 4274 if (ata_is_host_link(link)) 4275 id = dev->devno; 4276 else 4277 channel = link->pmp; 4278 4279 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4280 NULL); 4281 if (!IS_ERR(sdev)) { 4282 dev->sdev = sdev; 4283 ata_scsi_assign_ofnode(dev, ap); 4284 scsi_device_put(sdev); 4285 } else { 4286 dev->sdev = NULL; 4287 } 4288 } 4289 } 4290 4291 /* If we scanned while EH was in progress or allocation 4292 * failure occurred, scan would have failed silently. Check 4293 * whether all devices are attached. 4294 */ 4295 ata_for_each_link(link, ap, EDGE) { 4296 ata_for_each_dev(dev, link, ENABLED) { 4297 if (!dev->sdev) 4298 goto exit_loop; 4299 } 4300 } 4301 exit_loop: 4302 if (!link) 4303 return; 4304 4305 /* we're missing some SCSI devices */ 4306 if (sync) { 4307 /* If caller requested synchrnous scan && we've made 4308 * any progress, sleep briefly and repeat. 4309 */ 4310 if (dev != last_failed_dev) { 4311 msleep(100); 4312 last_failed_dev = dev; 4313 goto repeat; 4314 } 4315 4316 /* We might be failing to detect boot device, give it 4317 * a few more chances. 4318 */ 4319 if (--tries) { 4320 msleep(100); 4321 goto repeat; 4322 } 4323 4324 ata_port_err(ap, 4325 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4326 } 4327 4328 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4329 round_jiffies_relative(HZ)); 4330 } 4331 4332 /** 4333 * ata_scsi_offline_dev - offline attached SCSI device 4334 * @dev: ATA device to offline attached SCSI device for 4335 * 4336 * This function is called from ata_eh_hotplug() and responsible 4337 * for taking the SCSI device attached to @dev offline. This 4338 * function is called with host lock which protects dev->sdev 4339 * against clearing. 4340 * 4341 * LOCKING: 4342 * spin_lock_irqsave(host lock) 4343 * 4344 * RETURNS: 4345 * 1 if attached SCSI device exists, 0 otherwise. 4346 */ 4347 int ata_scsi_offline_dev(struct ata_device *dev) 4348 { 4349 if (dev->sdev) { 4350 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4351 return 1; 4352 } 4353 return 0; 4354 } 4355 4356 /** 4357 * ata_scsi_remove_dev - remove attached SCSI device 4358 * @dev: ATA device to remove attached SCSI device for 4359 * 4360 * This function is called from ata_eh_scsi_hotplug() and 4361 * responsible for removing the SCSI device attached to @dev. 4362 * 4363 * LOCKING: 4364 * Kernel thread context (may sleep). 4365 */ 4366 static void ata_scsi_remove_dev(struct ata_device *dev) 4367 { 4368 struct ata_port *ap = dev->link->ap; 4369 struct scsi_device *sdev; 4370 unsigned long flags; 4371 4372 /* Alas, we need to grab scan_mutex to ensure SCSI device 4373 * state doesn't change underneath us and thus 4374 * scsi_device_get() always succeeds. The mutex locking can 4375 * be removed if there is __scsi_device_get() interface which 4376 * increments reference counts regardless of device state. 4377 */ 4378 mutex_lock(&ap->scsi_host->scan_mutex); 4379 spin_lock_irqsave(ap->lock, flags); 4380 4381 /* clearing dev->sdev is protected by host lock */ 4382 sdev = dev->sdev; 4383 dev->sdev = NULL; 4384 4385 if (sdev) { 4386 /* If user initiated unplug races with us, sdev can go 4387 * away underneath us after the host lock and 4388 * scan_mutex are released. Hold onto it. 4389 */ 4390 if (scsi_device_get(sdev) == 0) { 4391 /* The following ensures the attached sdev is 4392 * offline on return from ata_scsi_offline_dev() 4393 * regardless it wins or loses the race 4394 * against this function. 4395 */ 4396 scsi_device_set_state(sdev, SDEV_OFFLINE); 4397 } else { 4398 WARN_ON(1); 4399 sdev = NULL; 4400 } 4401 } 4402 4403 spin_unlock_irqrestore(ap->lock, flags); 4404 mutex_unlock(&ap->scsi_host->scan_mutex); 4405 4406 if (sdev) { 4407 ata_dev_info(dev, "detaching (SCSI %s)\n", 4408 dev_name(&sdev->sdev_gendev)); 4409 4410 scsi_remove_device(sdev); 4411 scsi_device_put(sdev); 4412 } 4413 } 4414 4415 static void ata_scsi_handle_link_detach(struct ata_link *link) 4416 { 4417 struct ata_port *ap = link->ap; 4418 struct ata_device *dev; 4419 4420 ata_for_each_dev(dev, link, ALL) { 4421 unsigned long flags; 4422 4423 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4424 continue; 4425 4426 spin_lock_irqsave(ap->lock, flags); 4427 dev->flags &= ~ATA_DFLAG_DETACHED; 4428 spin_unlock_irqrestore(ap->lock, flags); 4429 4430 if (zpodd_dev_enabled(dev)) 4431 zpodd_exit(dev); 4432 4433 ata_scsi_remove_dev(dev); 4434 } 4435 } 4436 4437 /** 4438 * ata_scsi_media_change_notify - send media change event 4439 * @dev: Pointer to the disk device with media change event 4440 * 4441 * Tell the block layer to send a media change notification 4442 * event. 4443 * 4444 * LOCKING: 4445 * spin_lock_irqsave(host lock) 4446 */ 4447 void ata_scsi_media_change_notify(struct ata_device *dev) 4448 { 4449 if (dev->sdev) 4450 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4451 GFP_ATOMIC); 4452 } 4453 4454 /** 4455 * ata_scsi_hotplug - SCSI part of hotplug 4456 * @work: Pointer to ATA port to perform SCSI hotplug on 4457 * 4458 * Perform SCSI part of hotplug. It's executed from a separate 4459 * workqueue after EH completes. This is necessary because SCSI 4460 * hot plugging requires working EH and hot unplugging is 4461 * synchronized with hot plugging with a mutex. 4462 * 4463 * LOCKING: 4464 * Kernel thread context (may sleep). 4465 */ 4466 void ata_scsi_hotplug(struct work_struct *work) 4467 { 4468 struct ata_port *ap = 4469 container_of(work, struct ata_port, hotplug_task.work); 4470 int i; 4471 4472 if (ap->pflags & ATA_PFLAG_UNLOADING) 4473 return; 4474 4475 mutex_lock(&ap->scsi_scan_mutex); 4476 4477 /* Unplug detached devices. We cannot use link iterator here 4478 * because PMP links have to be scanned even if PMP is 4479 * currently not attached. Iterate manually. 4480 */ 4481 ata_scsi_handle_link_detach(&ap->link); 4482 if (ap->pmp_link) 4483 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4484 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4485 4486 /* scan for new ones */ 4487 ata_scsi_scan_host(ap, 0); 4488 4489 mutex_unlock(&ap->scsi_scan_mutex); 4490 } 4491 4492 /** 4493 * ata_scsi_user_scan - indication for user-initiated bus scan 4494 * @shost: SCSI host to scan 4495 * @channel: Channel to scan 4496 * @id: ID to scan 4497 * @lun: LUN to scan 4498 * 4499 * This function is called when user explicitly requests bus 4500 * scan. Set probe pending flag and invoke EH. 4501 * 4502 * LOCKING: 4503 * SCSI layer (we don't care) 4504 * 4505 * RETURNS: 4506 * Zero. 4507 */ 4508 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4509 unsigned int id, u64 lun) 4510 { 4511 struct ata_port *ap = ata_shost_to_port(shost); 4512 unsigned long flags; 4513 int devno, rc = 0; 4514 4515 if (!ap->ops->error_handler) 4516 return -EOPNOTSUPP; 4517 4518 if (lun != SCAN_WILD_CARD && lun) 4519 return -EINVAL; 4520 4521 if (!sata_pmp_attached(ap)) { 4522 if (channel != SCAN_WILD_CARD && channel) 4523 return -EINVAL; 4524 devno = id; 4525 } else { 4526 if (id != SCAN_WILD_CARD && id) 4527 return -EINVAL; 4528 devno = channel; 4529 } 4530 4531 spin_lock_irqsave(ap->lock, flags); 4532 4533 if (devno == SCAN_WILD_CARD) { 4534 struct ata_link *link; 4535 4536 ata_for_each_link(link, ap, EDGE) { 4537 struct ata_eh_info *ehi = &link->eh_info; 4538 ehi->probe_mask |= ATA_ALL_DEVICES; 4539 ehi->action |= ATA_EH_RESET; 4540 } 4541 } else { 4542 struct ata_device *dev = ata_find_dev(ap, devno); 4543 4544 if (dev) { 4545 struct ata_eh_info *ehi = &dev->link->eh_info; 4546 ehi->probe_mask |= 1 << dev->devno; 4547 ehi->action |= ATA_EH_RESET; 4548 } else 4549 rc = -EINVAL; 4550 } 4551 4552 if (rc == 0) { 4553 ata_port_schedule_eh(ap); 4554 spin_unlock_irqrestore(ap->lock, flags); 4555 ata_port_wait_eh(ap); 4556 } else 4557 spin_unlock_irqrestore(ap->lock, flags); 4558 4559 return rc; 4560 } 4561 4562 /** 4563 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4564 * @work: Pointer to ATA port to perform scsi_rescan_device() 4565 * 4566 * After ATA pass thru (SAT) commands are executed successfully, 4567 * libata need to propagate the changes to SCSI layer. 4568 * 4569 * LOCKING: 4570 * Kernel thread context (may sleep). 4571 */ 4572 void ata_scsi_dev_rescan(struct work_struct *work) 4573 { 4574 struct ata_port *ap = 4575 container_of(work, struct ata_port, scsi_rescan_task); 4576 struct ata_link *link; 4577 struct ata_device *dev; 4578 unsigned long flags; 4579 4580 mutex_lock(&ap->scsi_scan_mutex); 4581 spin_lock_irqsave(ap->lock, flags); 4582 4583 ata_for_each_link(link, ap, EDGE) { 4584 ata_for_each_dev(dev, link, ENABLED) { 4585 struct scsi_device *sdev = dev->sdev; 4586 4587 if (!sdev) 4588 continue; 4589 if (scsi_device_get(sdev)) 4590 continue; 4591 4592 spin_unlock_irqrestore(ap->lock, flags); 4593 scsi_rescan_device(&(sdev->sdev_gendev)); 4594 scsi_device_put(sdev); 4595 spin_lock_irqsave(ap->lock, flags); 4596 } 4597 } 4598 4599 spin_unlock_irqrestore(ap->lock, flags); 4600 mutex_unlock(&ap->scsi_scan_mutex); 4601 } 4602