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