1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * libata-scsi.c - helper library for ATA 4 * 5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 6 * Copyright 2003-2004 Jeff Garzik 7 * 8 * libata documentation is available via 'make {ps|pdf}docs', 9 * as Documentation/driver-api/libata.rst 10 * 11 * Hardware documentation available from 12 * - http://www.t10.org/ 13 * - http://www.t13.org/ 14 */ 15 16 #include <linux/compat.h> 17 #include <linux/slab.h> 18 #include <linux/kernel.h> 19 #include <linux/blkdev.h> 20 #include <linux/spinlock.h> 21 #include <linux/export.h> 22 #include <scsi/scsi.h> 23 #include <scsi/scsi_host.h> 24 #include <scsi/scsi_cmnd.h> 25 #include <scsi/scsi_eh.h> 26 #include <scsi/scsi_device.h> 27 #include <scsi/scsi_tcq.h> 28 #include <scsi/scsi_transport.h> 29 #include <linux/libata.h> 30 #include <linux/hdreg.h> 31 #include <linux/uaccess.h> 32 #include <linux/suspend.h> 33 #include <asm/unaligned.h> 34 #include <linux/ioprio.h> 35 #include <linux/of.h> 36 37 #include "libata.h" 38 #include "libata-transport.h" 39 40 #define ATA_SCSI_RBUF_SIZE 576 41 42 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 43 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 44 45 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 46 47 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 48 const struct scsi_device *scsidev); 49 50 #define RW_RECOVERY_MPAGE 0x1 51 #define RW_RECOVERY_MPAGE_LEN 12 52 #define CACHE_MPAGE 0x8 53 #define CACHE_MPAGE_LEN 20 54 #define CONTROL_MPAGE 0xa 55 #define CONTROL_MPAGE_LEN 12 56 #define ALL_MPAGES 0x3f 57 #define ALL_SUB_MPAGES 0xff 58 59 60 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 61 RW_RECOVERY_MPAGE, 62 RW_RECOVERY_MPAGE_LEN - 2, 63 (1 << 7), /* AWRE */ 64 0, /* read retry count */ 65 0, 0, 0, 0, 66 0, /* write retry count */ 67 0, 0, 0 68 }; 69 70 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 71 CACHE_MPAGE, 72 CACHE_MPAGE_LEN - 2, 73 0, /* contains WCE, needs to be 0 for logic */ 74 0, 0, 0, 0, 0, 0, 0, 0, 0, 75 0, /* contains DRA, needs to be 0 for logic */ 76 0, 0, 0, 0, 0, 0, 0 77 }; 78 79 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 80 CONTROL_MPAGE, 81 CONTROL_MPAGE_LEN - 2, 82 2, /* DSENSE=0, GLTSD=1 */ 83 0, /* [QAM+QERR may be 1, see 05-359r1] */ 84 0, 0, 0, 0, 0xff, 0xff, 85 0, 30 /* extended self test time, see 05-359r1 */ 86 }; 87 88 static ssize_t ata_scsi_park_show(struct device *device, 89 struct device_attribute *attr, char *buf) 90 { 91 struct scsi_device *sdev = to_scsi_device(device); 92 struct ata_port *ap; 93 struct ata_link *link; 94 struct ata_device *dev; 95 unsigned long now; 96 unsigned int msecs; 97 int rc = 0; 98 99 ap = ata_shost_to_port(sdev->host); 100 101 spin_lock_irq(ap->lock); 102 dev = ata_scsi_find_dev(ap, sdev); 103 if (!dev) { 104 rc = -ENODEV; 105 goto unlock; 106 } 107 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 108 rc = -EOPNOTSUPP; 109 goto unlock; 110 } 111 112 link = dev->link; 113 now = jiffies; 114 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 115 link->eh_context.unloaded_mask & (1 << dev->devno) && 116 time_after(dev->unpark_deadline, now)) 117 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 118 else 119 msecs = 0; 120 121 unlock: 122 spin_unlock_irq(ap->lock); 123 124 return rc ? rc : sysfs_emit(buf, "%u\n", msecs); 125 } 126 127 static ssize_t ata_scsi_park_store(struct device *device, 128 struct device_attribute *attr, 129 const char *buf, size_t len) 130 { 131 struct scsi_device *sdev = to_scsi_device(device); 132 struct ata_port *ap; 133 struct ata_device *dev; 134 long int input; 135 unsigned long flags; 136 int rc; 137 138 rc = kstrtol(buf, 10, &input); 139 if (rc) 140 return rc; 141 if (input < -2) 142 return -EINVAL; 143 if (input > ATA_TMOUT_MAX_PARK) { 144 rc = -EOVERFLOW; 145 input = ATA_TMOUT_MAX_PARK; 146 } 147 148 ap = ata_shost_to_port(sdev->host); 149 150 spin_lock_irqsave(ap->lock, flags); 151 dev = ata_scsi_find_dev(ap, sdev); 152 if (unlikely(!dev)) { 153 rc = -ENODEV; 154 goto unlock; 155 } 156 if (dev->class != ATA_DEV_ATA && 157 dev->class != ATA_DEV_ZAC) { 158 rc = -EOPNOTSUPP; 159 goto unlock; 160 } 161 162 if (input >= 0) { 163 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 164 rc = -EOPNOTSUPP; 165 goto unlock; 166 } 167 168 dev->unpark_deadline = ata_deadline(jiffies, input); 169 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 170 ata_port_schedule_eh(ap); 171 complete(&ap->park_req_pending); 172 } else { 173 switch (input) { 174 case -1: 175 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 176 break; 177 case -2: 178 dev->flags |= ATA_DFLAG_NO_UNLOAD; 179 break; 180 } 181 } 182 unlock: 183 spin_unlock_irqrestore(ap->lock, flags); 184 185 return rc ? rc : len; 186 } 187 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 188 ata_scsi_park_show, ata_scsi_park_store); 189 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 190 191 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 192 u8 sk, u8 asc, u8 ascq) 193 { 194 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 195 196 if (!cmd) 197 return; 198 199 scsi_build_sense(cmd, d_sense, sk, asc, ascq); 200 } 201 202 void ata_scsi_set_sense_information(struct ata_device *dev, 203 struct scsi_cmnd *cmd, 204 const struct ata_taskfile *tf) 205 { 206 u64 information; 207 208 if (!cmd) 209 return; 210 211 information = ata_tf_read_block(tf, dev); 212 if (information == U64_MAX) 213 return; 214 215 scsi_set_sense_information(cmd->sense_buffer, 216 SCSI_SENSE_BUFFERSIZE, information); 217 } 218 219 static void ata_scsi_set_invalid_field(struct ata_device *dev, 220 struct scsi_cmnd *cmd, u16 field, u8 bit) 221 { 222 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 223 /* "Invalid field in CDB" */ 224 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 225 field, bit, 1); 226 } 227 228 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 229 struct scsi_cmnd *cmd, u16 field) 230 { 231 /* "Invalid field in parameter list" */ 232 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 233 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 234 field, 0xff, 0); 235 } 236 237 static struct attribute *ata_common_sdev_attrs[] = { 238 &dev_attr_unload_heads.attr, 239 NULL 240 }; 241 242 static const struct attribute_group ata_common_sdev_attr_group = { 243 .attrs = ata_common_sdev_attrs 244 }; 245 246 const struct attribute_group *ata_common_sdev_groups[] = { 247 &ata_common_sdev_attr_group, 248 NULL 249 }; 250 EXPORT_SYMBOL_GPL(ata_common_sdev_groups); 251 252 /** 253 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 254 * @sdev: SCSI device for which BIOS geometry is to be determined 255 * @bdev: block device associated with @sdev 256 * @capacity: capacity of SCSI device 257 * @geom: location to which geometry will be output 258 * 259 * Generic bios head/sector/cylinder calculator 260 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 261 * mapping. Some situations may arise where the disk is not 262 * bootable if this is not used. 263 * 264 * LOCKING: 265 * Defined by the SCSI layer. We don't really care. 266 * 267 * RETURNS: 268 * Zero. 269 */ 270 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 271 sector_t capacity, int geom[]) 272 { 273 geom[0] = 255; 274 geom[1] = 63; 275 sector_div(capacity, 255*63); 276 geom[2] = capacity; 277 278 return 0; 279 } 280 EXPORT_SYMBOL_GPL(ata_std_bios_param); 281 282 /** 283 * ata_scsi_unlock_native_capacity - unlock native capacity 284 * @sdev: SCSI device to adjust device capacity for 285 * 286 * This function is called if a partition on @sdev extends beyond 287 * the end of the device. It requests EH to unlock HPA. 288 * 289 * LOCKING: 290 * Defined by the SCSI layer. Might sleep. 291 */ 292 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 293 { 294 struct ata_port *ap = ata_shost_to_port(sdev->host); 295 struct ata_device *dev; 296 unsigned long flags; 297 298 spin_lock_irqsave(ap->lock, flags); 299 300 dev = ata_scsi_find_dev(ap, sdev); 301 if (dev && dev->n_sectors < dev->n_native_sectors) { 302 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 303 dev->link->eh_info.action |= ATA_EH_RESET; 304 ata_port_schedule_eh(ap); 305 } 306 307 spin_unlock_irqrestore(ap->lock, flags); 308 ata_port_wait_eh(ap); 309 } 310 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 311 312 /** 313 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 314 * @ap: target port 315 * @sdev: SCSI device to get identify data for 316 * @arg: User buffer area for identify data 317 * 318 * LOCKING: 319 * Defined by the SCSI layer. We don't really care. 320 * 321 * RETURNS: 322 * Zero on success, negative errno on error. 323 */ 324 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 325 void __user *arg) 326 { 327 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 328 u16 __user *dst = arg; 329 char buf[40]; 330 331 if (!dev) 332 return -ENOMSG; 333 334 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 335 return -EFAULT; 336 337 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 338 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 339 return -EFAULT; 340 341 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 342 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 343 return -EFAULT; 344 345 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 346 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 347 return -EFAULT; 348 349 return 0; 350 } 351 352 /** 353 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 354 * @scsidev: Device to which we are issuing command 355 * @arg: User provided data for issuing command 356 * 357 * LOCKING: 358 * Defined by the SCSI layer. We don't really care. 359 * 360 * RETURNS: 361 * Zero on success, negative errno on error. 362 */ 363 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 364 { 365 int rc = 0; 366 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 367 u8 scsi_cmd[MAX_COMMAND_SIZE]; 368 u8 args[4], *argbuf = NULL; 369 int argsize = 0; 370 enum dma_data_direction data_dir; 371 struct scsi_sense_hdr sshdr; 372 int cmd_result; 373 374 if (arg == NULL) 375 return -EINVAL; 376 377 if (copy_from_user(args, arg, sizeof(args))) 378 return -EFAULT; 379 380 memset(sensebuf, 0, sizeof(sensebuf)); 381 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 382 383 if (args[3]) { 384 argsize = ATA_SECT_SIZE * args[3]; 385 argbuf = kmalloc(argsize, GFP_KERNEL); 386 if (argbuf == NULL) { 387 rc = -ENOMEM; 388 goto error; 389 } 390 391 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 392 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 393 block count in sector count field */ 394 data_dir = DMA_FROM_DEVICE; 395 } else { 396 scsi_cmd[1] = (3 << 1); /* Non-data */ 397 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 398 data_dir = DMA_NONE; 399 } 400 401 scsi_cmd[0] = ATA_16; 402 403 scsi_cmd[4] = args[2]; 404 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 405 scsi_cmd[6] = args[3]; 406 scsi_cmd[8] = args[1]; 407 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 408 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 409 } else { 410 scsi_cmd[6] = args[1]; 411 } 412 scsi_cmd[14] = args[0]; 413 414 /* Good values for timeout and retries? Values below 415 from scsi_ioctl_send_command() for default case... */ 416 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 417 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 418 419 if (cmd_result < 0) { 420 rc = cmd_result; 421 goto error; 422 } 423 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 424 u8 *desc = sensebuf + 8; 425 426 /* If we set cc then ATA pass-through will cause a 427 * check condition even if no error. Filter that. */ 428 if (scsi_status_is_check_condition(cmd_result)) { 429 if (sshdr.sense_key == RECOVERED_ERROR && 430 sshdr.asc == 0 && sshdr.ascq == 0x1d) 431 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 432 } 433 434 /* Send userspace a few ATA registers (same as drivers/ide) */ 435 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 436 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 437 args[0] = desc[13]; /* status */ 438 args[1] = desc[3]; /* error */ 439 args[2] = desc[5]; /* sector count (0:7) */ 440 if (copy_to_user(arg, args, sizeof(args))) 441 rc = -EFAULT; 442 } 443 } 444 445 446 if (cmd_result) { 447 rc = -EIO; 448 goto error; 449 } 450 451 if ((argbuf) 452 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 453 rc = -EFAULT; 454 error: 455 kfree(argbuf); 456 return rc; 457 } 458 459 /** 460 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 461 * @scsidev: Device to which we are issuing command 462 * @arg: User provided data for issuing command 463 * 464 * LOCKING: 465 * Defined by the SCSI layer. We don't really care. 466 * 467 * RETURNS: 468 * Zero on success, negative errno on error. 469 */ 470 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 471 { 472 int rc = 0; 473 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 474 u8 scsi_cmd[MAX_COMMAND_SIZE]; 475 u8 args[7]; 476 struct scsi_sense_hdr sshdr; 477 int cmd_result; 478 479 if (arg == NULL) 480 return -EINVAL; 481 482 if (copy_from_user(args, arg, sizeof(args))) 483 return -EFAULT; 484 485 memset(sensebuf, 0, sizeof(sensebuf)); 486 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 487 scsi_cmd[0] = ATA_16; 488 scsi_cmd[1] = (3 << 1); /* Non-data */ 489 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 490 scsi_cmd[4] = args[1]; 491 scsi_cmd[6] = args[2]; 492 scsi_cmd[8] = args[3]; 493 scsi_cmd[10] = args[4]; 494 scsi_cmd[12] = args[5]; 495 scsi_cmd[13] = args[6] & 0x4f; 496 scsi_cmd[14] = args[0]; 497 498 /* Good values for timeout and retries? Values below 499 from scsi_ioctl_send_command() for default case... */ 500 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 501 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 502 503 if (cmd_result < 0) { 504 rc = cmd_result; 505 goto error; 506 } 507 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 508 u8 *desc = sensebuf + 8; 509 510 /* If we set cc then ATA pass-through will cause a 511 * check condition even if no error. Filter that. */ 512 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 513 if (sshdr.sense_key == RECOVERED_ERROR && 514 sshdr.asc == 0 && sshdr.ascq == 0x1d) 515 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 516 } 517 518 /* Send userspace ATA registers */ 519 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 520 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 521 args[0] = desc[13]; /* status */ 522 args[1] = desc[3]; /* error */ 523 args[2] = desc[5]; /* sector count (0:7) */ 524 args[3] = desc[7]; /* lbal */ 525 args[4] = desc[9]; /* lbam */ 526 args[5] = desc[11]; /* lbah */ 527 args[6] = desc[12]; /* select */ 528 if (copy_to_user(arg, args, sizeof(args))) 529 rc = -EFAULT; 530 } 531 } 532 533 if (cmd_result) { 534 rc = -EIO; 535 goto error; 536 } 537 538 error: 539 return rc; 540 } 541 542 static bool ata_ioc32(struct ata_port *ap) 543 { 544 if (ap->flags & ATA_FLAG_PIO_DMA) 545 return true; 546 if (ap->pflags & ATA_PFLAG_PIO32) 547 return true; 548 return false; 549 } 550 551 /* 552 * This handles both native and compat commands, so anything added 553 * here must have a compatible argument, or check in_compat_syscall() 554 */ 555 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 556 unsigned int cmd, void __user *arg) 557 { 558 unsigned long val; 559 int rc = -EINVAL; 560 unsigned long flags; 561 562 switch (cmd) { 563 case HDIO_GET_32BIT: 564 spin_lock_irqsave(ap->lock, flags); 565 val = ata_ioc32(ap); 566 spin_unlock_irqrestore(ap->lock, flags); 567 #ifdef CONFIG_COMPAT 568 if (in_compat_syscall()) 569 return put_user(val, (compat_ulong_t __user *)arg); 570 #endif 571 return put_user(val, (unsigned long __user *)arg); 572 573 case HDIO_SET_32BIT: 574 val = (unsigned long) arg; 575 rc = 0; 576 spin_lock_irqsave(ap->lock, flags); 577 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 578 if (val) 579 ap->pflags |= ATA_PFLAG_PIO32; 580 else 581 ap->pflags &= ~ATA_PFLAG_PIO32; 582 } else { 583 if (val != ata_ioc32(ap)) 584 rc = -EINVAL; 585 } 586 spin_unlock_irqrestore(ap->lock, flags); 587 return rc; 588 589 case HDIO_GET_IDENTITY: 590 return ata_get_identity(ap, scsidev, arg); 591 592 case HDIO_DRIVE_CMD: 593 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 594 return -EACCES; 595 return ata_cmd_ioctl(scsidev, arg); 596 597 case HDIO_DRIVE_TASK: 598 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 599 return -EACCES; 600 return ata_task_ioctl(scsidev, arg); 601 602 default: 603 rc = -ENOTTY; 604 break; 605 } 606 607 return rc; 608 } 609 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 610 611 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 612 void __user *arg) 613 { 614 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 615 scsidev, cmd, arg); 616 } 617 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 618 619 /** 620 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 621 * @dev: ATA device to which the new command is attached 622 * @cmd: SCSI command that originated this ATA command 623 * 624 * Obtain a reference to an unused ata_queued_cmd structure, 625 * which is the basic libata structure representing a single 626 * ATA command sent to the hardware. 627 * 628 * If a command was available, fill in the SCSI-specific 629 * portions of the structure with information on the 630 * current command. 631 * 632 * LOCKING: 633 * spin_lock_irqsave(host lock) 634 * 635 * RETURNS: 636 * Command allocated, or %NULL if none available. 637 */ 638 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 639 struct scsi_cmnd *cmd) 640 { 641 struct ata_port *ap = dev->link->ap; 642 struct ata_queued_cmd *qc; 643 int tag; 644 645 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 646 goto fail; 647 648 if (ap->flags & ATA_FLAG_SAS_HOST) { 649 /* 650 * SAS hosts may queue > ATA_MAX_QUEUE commands so use 651 * unique per-device budget token as a tag. 652 */ 653 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE)) 654 goto fail; 655 tag = cmd->budget_token; 656 } else { 657 tag = scsi_cmd_to_rq(cmd)->tag; 658 } 659 660 qc = __ata_qc_from_tag(ap, tag); 661 qc->tag = qc->hw_tag = tag; 662 qc->ap = ap; 663 qc->dev = dev; 664 665 ata_qc_reinit(qc); 666 667 qc->scsicmd = cmd; 668 qc->scsidone = scsi_done; 669 670 qc->sg = scsi_sglist(cmd); 671 qc->n_elem = scsi_sg_count(cmd); 672 673 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 674 qc->flags |= ATA_QCFLAG_QUIET; 675 676 return qc; 677 678 fail: 679 set_host_byte(cmd, DID_OK); 680 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL); 681 scsi_done(cmd); 682 return NULL; 683 } 684 685 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 686 { 687 struct scsi_cmnd *scmd = qc->scsicmd; 688 689 qc->extrabytes = scmd->extra_len; 690 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 691 } 692 693 /** 694 * ata_dump_status - user friendly display of error info 695 * @ap: the port in question 696 * @tf: ptr to filled out taskfile 697 * 698 * Decode and dump the ATA error/status registers for the user so 699 * that they have some idea what really happened at the non 700 * make-believe layer. 701 * 702 * LOCKING: 703 * inherited from caller 704 */ 705 static void ata_dump_status(struct ata_port *ap, struct ata_taskfile *tf) 706 { 707 u8 stat = tf->status, err = tf->error; 708 709 if (stat & ATA_BUSY) { 710 ata_port_warn(ap, "status=0x%02x {Busy} ", stat); 711 } else { 712 ata_port_warn(ap, "status=0x%02x { %s%s%s%s%s%s%s} ", stat, 713 stat & ATA_DRDY ? "DriveReady " : "", 714 stat & ATA_DF ? "DeviceFault " : "", 715 stat & ATA_DSC ? "SeekComplete " : "", 716 stat & ATA_DRQ ? "DataRequest " : "", 717 stat & ATA_CORR ? "CorrectedError " : "", 718 stat & ATA_SENSE ? "Sense " : "", 719 stat & ATA_ERR ? "Error " : ""); 720 if (err) 721 ata_port_warn(ap, "error=0x%02x {%s%s%s%s%s%s", err, 722 err & ATA_ABORTED ? 723 "DriveStatusError " : "", 724 err & ATA_ICRC ? 725 (err & ATA_ABORTED ? 726 "BadCRC " : "Sector ") : "", 727 err & ATA_UNC ? "UncorrectableError " : "", 728 err & ATA_IDNF ? "SectorIdNotFound " : "", 729 err & ATA_TRK0NF ? "TrackZeroNotFound " : "", 730 err & ATA_AMNF ? "AddrMarkNotFound " : ""); 731 } 732 } 733 734 /** 735 * ata_to_sense_error - convert ATA error to SCSI error 736 * @id: ATA device number 737 * @drv_stat: value contained in ATA status register 738 * @drv_err: value contained in ATA error register 739 * @sk: the sense key we'll fill out 740 * @asc: the additional sense code we'll fill out 741 * @ascq: the additional sense code qualifier we'll fill out 742 * @verbose: be verbose 743 * 744 * Converts an ATA error into a SCSI error. Fill out pointers to 745 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 746 * format sense blocks. 747 * 748 * LOCKING: 749 * spin_lock_irqsave(host lock) 750 */ 751 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 752 u8 *asc, u8 *ascq, int verbose) 753 { 754 int i; 755 756 /* Based on the 3ware driver translation table */ 757 static const unsigned char sense_table[][4] = { 758 /* BBD|ECC|ID|MAR */ 759 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 760 // Device busy Aborted command 761 /* BBD|ECC|ID */ 762 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 763 // Device busy Aborted command 764 /* ECC|MC|MARK */ 765 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 766 // Device fault Hardware error 767 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 768 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 769 // Data CRC error SCSI parity error 770 /* MC|ID|ABRT|TRK0|MARK */ 771 {0x37, NOT_READY, 0x04, 0x00}, 772 // Unit offline Not ready 773 /* MCR|MARK */ 774 {0x09, NOT_READY, 0x04, 0x00}, 775 // Unrecovered disk error Not ready 776 /* Bad address mark */ 777 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 778 // Address mark not found for data field 779 /* TRK0 - Track 0 not found */ 780 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 781 // Hardware error 782 /* Abort: 0x04 is not translated here, see below */ 783 /* Media change request */ 784 {0x08, NOT_READY, 0x04, 0x00}, 785 // FIXME: faking offline 786 /* SRV/IDNF - ID not found */ 787 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 788 // Logical address out of range 789 /* MC - Media Changed */ 790 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 791 // Not ready to ready change, medium may have changed 792 /* ECC - Uncorrectable ECC error */ 793 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 794 // Unrecovered read error 795 /* BBD - block marked bad */ 796 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 797 // Block marked bad Medium error, unrecovered read error 798 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 799 }; 800 static const unsigned char stat_table[][4] = { 801 /* Must be first because BUSY means no other bits valid */ 802 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 803 // Busy, fake parity for now 804 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 805 // Device ready, unaligned write command 806 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 807 // Device fault, internal target failure 808 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 809 // Timed out in xfer, fake parity for now 810 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 811 // Recovered ECC error Medium error, recovered 812 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 813 }; 814 815 /* 816 * Is this an error we can process/parse 817 */ 818 if (drv_stat & ATA_BUSY) { 819 drv_err = 0; /* Ignore the err bits, they're invalid */ 820 } 821 822 if (drv_err) { 823 /* Look for drv_err */ 824 for (i = 0; sense_table[i][0] != 0xFF; i++) { 825 /* Look for best matches first */ 826 if ((sense_table[i][0] & drv_err) == 827 sense_table[i][0]) { 828 *sk = sense_table[i][1]; 829 *asc = sense_table[i][2]; 830 *ascq = sense_table[i][3]; 831 goto translate_done; 832 } 833 } 834 } 835 836 /* 837 * Fall back to interpreting status bits. Note that if the drv_err 838 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 839 * is not descriptive enough. 840 */ 841 for (i = 0; stat_table[i][0] != 0xFF; i++) { 842 if (stat_table[i][0] & drv_stat) { 843 *sk = stat_table[i][1]; 844 *asc = stat_table[i][2]; 845 *ascq = stat_table[i][3]; 846 goto translate_done; 847 } 848 } 849 850 /* 851 * We need a sensible error return here, which is tricky, and one 852 * that won't cause people to do things like return a disk wrongly. 853 */ 854 *sk = ABORTED_COMMAND; 855 *asc = 0x00; 856 *ascq = 0x00; 857 858 translate_done: 859 if (verbose) 860 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 861 id, drv_stat, drv_err, *sk, *asc, *ascq); 862 return; 863 } 864 865 /* 866 * ata_gen_passthru_sense - Generate check condition sense block. 867 * @qc: Command that completed. 868 * 869 * This function is specific to the ATA descriptor format sense 870 * block specified for the ATA pass through commands. Regardless 871 * of whether the command errored or not, return a sense 872 * block. Copy all controller registers into the sense 873 * block. If there was no error, we get the request from an ATA 874 * passthrough command, so we use the following sense data: 875 * sk = RECOVERED ERROR 876 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 877 * 878 * 879 * LOCKING: 880 * None. 881 */ 882 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 883 { 884 struct scsi_cmnd *cmd = qc->scsicmd; 885 struct ata_taskfile *tf = &qc->result_tf; 886 unsigned char *sb = cmd->sense_buffer; 887 unsigned char *desc = sb + 8; 888 int verbose = qc->ap->ops->error_handler == NULL; 889 u8 sense_key, asc, ascq; 890 891 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 892 893 /* 894 * Use ata_to_sense_error() to map status register bits 895 * onto sense key, asc & ascq. 896 */ 897 if (qc->err_mask || 898 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 899 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error, 900 &sense_key, &asc, &ascq, verbose); 901 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 902 } else { 903 /* 904 * ATA PASS-THROUGH INFORMATION AVAILABLE 905 * Always in descriptor format sense. 906 */ 907 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 908 } 909 910 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 911 u8 len; 912 913 /* descriptor format */ 914 len = sb[7]; 915 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 916 if (!desc) { 917 if (SCSI_SENSE_BUFFERSIZE < len + 14) 918 return; 919 sb[7] = len + 14; 920 desc = sb + 8 + len; 921 } 922 desc[0] = 9; 923 desc[1] = 12; 924 /* 925 * Copy registers into sense buffer. 926 */ 927 desc[2] = 0x00; 928 desc[3] = tf->error; 929 desc[5] = tf->nsect; 930 desc[7] = tf->lbal; 931 desc[9] = tf->lbam; 932 desc[11] = tf->lbah; 933 desc[12] = tf->device; 934 desc[13] = tf->status; 935 936 /* 937 * Fill in Extend bit, and the high order bytes 938 * if applicable. 939 */ 940 if (tf->flags & ATA_TFLAG_LBA48) { 941 desc[2] |= 0x01; 942 desc[4] = tf->hob_nsect; 943 desc[6] = tf->hob_lbal; 944 desc[8] = tf->hob_lbam; 945 desc[10] = tf->hob_lbah; 946 } 947 } else { 948 /* Fixed sense format */ 949 desc[0] = tf->error; 950 desc[1] = tf->status; 951 desc[2] = tf->device; 952 desc[3] = tf->nsect; 953 desc[7] = 0; 954 if (tf->flags & ATA_TFLAG_LBA48) { 955 desc[8] |= 0x80; 956 if (tf->hob_nsect) 957 desc[8] |= 0x40; 958 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 959 desc[8] |= 0x20; 960 } 961 desc[9] = tf->lbal; 962 desc[10] = tf->lbam; 963 desc[11] = tf->lbah; 964 } 965 } 966 967 /** 968 * ata_gen_ata_sense - generate a SCSI fixed sense block 969 * @qc: Command that we are erroring out 970 * 971 * Generate sense block for a failed ATA command @qc. Descriptor 972 * format is used to accommodate LBA48 block address. 973 * 974 * LOCKING: 975 * None. 976 */ 977 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 978 { 979 struct ata_device *dev = qc->dev; 980 struct scsi_cmnd *cmd = qc->scsicmd; 981 struct ata_taskfile *tf = &qc->result_tf; 982 unsigned char *sb = cmd->sense_buffer; 983 int verbose = qc->ap->ops->error_handler == NULL; 984 u64 block; 985 u8 sense_key, asc, ascq; 986 987 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 988 989 if (ata_dev_disabled(dev)) { 990 /* Device disabled after error recovery */ 991 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 992 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 993 return; 994 } 995 /* Use ata_to_sense_error() to map status register bits 996 * onto sense key, asc & ascq. 997 */ 998 if (qc->err_mask || 999 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1000 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error, 1001 &sense_key, &asc, &ascq, verbose); 1002 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1003 } else { 1004 /* Could not decode error */ 1005 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1006 tf->status, qc->err_mask); 1007 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1008 return; 1009 } 1010 1011 block = ata_tf_read_block(&qc->result_tf, dev); 1012 if (block == U64_MAX) 1013 return; 1014 1015 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1016 } 1017 1018 void ata_scsi_sdev_config(struct scsi_device *sdev) 1019 { 1020 sdev->use_10_for_rw = 1; 1021 sdev->use_10_for_ms = 1; 1022 sdev->no_write_same = 1; 1023 1024 /* Schedule policy is determined by ->qc_defer() callback and 1025 * it needs to see every deferred qc. Set dev_blocked to 1 to 1026 * prevent SCSI midlayer from automatically deferring 1027 * requests. 1028 */ 1029 sdev->max_device_blocked = 1; 1030 } 1031 1032 /** 1033 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1034 * @rq: request to be checked 1035 * 1036 * ATAPI commands which transfer variable length data to host 1037 * might overflow due to application error or hardware bug. This 1038 * function checks whether overflow should be drained and ignored 1039 * for @request. 1040 * 1041 * LOCKING: 1042 * None. 1043 * 1044 * RETURNS: 1045 * 1 if ; otherwise, 0. 1046 */ 1047 bool ata_scsi_dma_need_drain(struct request *rq) 1048 { 1049 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1050 1051 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1052 } 1053 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1054 1055 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1056 { 1057 struct request_queue *q = sdev->request_queue; 1058 int depth = 1; 1059 1060 if (!ata_id_has_unload(dev->id)) 1061 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1062 1063 /* configure max sectors */ 1064 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1065 blk_queue_max_hw_sectors(q, dev->max_sectors); 1066 1067 if (dev->class == ATA_DEV_ATAPI) { 1068 sdev->sector_size = ATA_SECT_SIZE; 1069 1070 /* set DMA padding */ 1071 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1072 1073 /* make room for appending the drain */ 1074 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1075 1076 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1077 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1078 if (!sdev->dma_drain_buf) { 1079 ata_dev_err(dev, "drain buffer allocation failed\n"); 1080 return -ENOMEM; 1081 } 1082 } else { 1083 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1084 sdev->manage_start_stop = 1; 1085 } 1086 1087 /* 1088 * ata_pio_sectors() expects buffer for each sector to not cross 1089 * page boundary. Enforce it by requiring buffers to be sector 1090 * aligned, which works iff sector_size is not larger than 1091 * PAGE_SIZE. ATAPI devices also need the alignment as 1092 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1093 */ 1094 if (sdev->sector_size > PAGE_SIZE) 1095 ata_dev_warn(dev, 1096 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1097 sdev->sector_size); 1098 1099 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1100 1101 if (dev->flags & ATA_DFLAG_AN) 1102 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1103 1104 if (dev->flags & ATA_DFLAG_NCQ) 1105 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1106 depth = min(ATA_MAX_QUEUE, depth); 1107 scsi_change_queue_depth(sdev, depth); 1108 1109 if (dev->flags & ATA_DFLAG_TRUSTED) 1110 sdev->security_supported = 1; 1111 1112 dev->sdev = sdev; 1113 return 0; 1114 } 1115 1116 /** 1117 * ata_scsi_slave_config - Set SCSI device attributes 1118 * @sdev: SCSI device to examine 1119 * 1120 * This is called before we actually start reading 1121 * and writing to the device, to configure certain 1122 * SCSI mid-layer behaviors. 1123 * 1124 * LOCKING: 1125 * Defined by SCSI layer. We don't really care. 1126 */ 1127 1128 int ata_scsi_slave_config(struct scsi_device *sdev) 1129 { 1130 struct ata_port *ap = ata_shost_to_port(sdev->host); 1131 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1132 int rc = 0; 1133 1134 ata_scsi_sdev_config(sdev); 1135 1136 if (dev) 1137 rc = ata_scsi_dev_config(sdev, dev); 1138 1139 return rc; 1140 } 1141 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1142 1143 /** 1144 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1145 * @sdev: SCSI device to be destroyed 1146 * 1147 * @sdev is about to be destroyed for hot/warm unplugging. If 1148 * this unplugging was initiated by libata as indicated by NULL 1149 * dev->sdev, this function doesn't have to do anything. 1150 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1151 * Clear dev->sdev, schedule the device for ATA detach and invoke 1152 * EH. 1153 * 1154 * LOCKING: 1155 * Defined by SCSI layer. We don't really care. 1156 */ 1157 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1158 { 1159 struct ata_port *ap = ata_shost_to_port(sdev->host); 1160 unsigned long flags; 1161 struct ata_device *dev; 1162 1163 if (!ap->ops->error_handler) 1164 return; 1165 1166 spin_lock_irqsave(ap->lock, flags); 1167 dev = __ata_scsi_find_dev(ap, sdev); 1168 if (dev && dev->sdev) { 1169 /* SCSI device already in CANCEL state, no need to offline it */ 1170 dev->sdev = NULL; 1171 dev->flags |= ATA_DFLAG_DETACH; 1172 ata_port_schedule_eh(ap); 1173 } 1174 spin_unlock_irqrestore(ap->lock, flags); 1175 1176 kfree(sdev->dma_drain_buf); 1177 } 1178 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1179 1180 /** 1181 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1182 * @qc: Storage for translated ATA taskfile 1183 * 1184 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1185 * (to start). Perhaps these commands should be preceded by 1186 * CHECK POWER MODE to see what power mode the device is already in. 1187 * [See SAT revision 5 at www.t10.org] 1188 * 1189 * LOCKING: 1190 * spin_lock_irqsave(host lock) 1191 * 1192 * RETURNS: 1193 * Zero on success, non-zero on error. 1194 */ 1195 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1196 { 1197 struct scsi_cmnd *scmd = qc->scsicmd; 1198 struct ata_taskfile *tf = &qc->tf; 1199 const u8 *cdb = scmd->cmnd; 1200 u16 fp; 1201 u8 bp = 0xff; 1202 1203 if (scmd->cmd_len < 5) { 1204 fp = 4; 1205 goto invalid_fld; 1206 } 1207 1208 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1209 tf->protocol = ATA_PROT_NODATA; 1210 if (cdb[1] & 0x1) { 1211 ; /* ignore IMMED bit, violates sat-r05 */ 1212 } 1213 if (cdb[4] & 0x2) { 1214 fp = 4; 1215 bp = 1; 1216 goto invalid_fld; /* LOEJ bit set not supported */ 1217 } 1218 if (((cdb[4] >> 4) & 0xf) != 0) { 1219 fp = 4; 1220 bp = 3; 1221 goto invalid_fld; /* power conditions not supported */ 1222 } 1223 1224 if (cdb[4] & 0x1) { 1225 tf->nsect = 1; /* 1 sector, lba=0 */ 1226 1227 if (qc->dev->flags & ATA_DFLAG_LBA) { 1228 tf->flags |= ATA_TFLAG_LBA; 1229 1230 tf->lbah = 0x0; 1231 tf->lbam = 0x0; 1232 tf->lbal = 0x0; 1233 tf->device |= ATA_LBA; 1234 } else { 1235 /* CHS */ 1236 tf->lbal = 0x1; /* sect */ 1237 tf->lbam = 0x0; /* cyl low */ 1238 tf->lbah = 0x0; /* cyl high */ 1239 } 1240 1241 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1242 } else { 1243 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1244 * or S5) causing some drives to spin up and down again. 1245 */ 1246 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1247 system_state == SYSTEM_POWER_OFF) 1248 goto skip; 1249 1250 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1251 system_entering_hibernation()) 1252 goto skip; 1253 1254 /* Issue ATA STANDBY IMMEDIATE command */ 1255 tf->command = ATA_CMD_STANDBYNOW1; 1256 } 1257 1258 /* 1259 * Standby and Idle condition timers could be implemented but that 1260 * would require libata to implement the Power condition mode page 1261 * and allow the user to change it. Changing mode pages requires 1262 * MODE SELECT to be implemented. 1263 */ 1264 1265 return 0; 1266 1267 invalid_fld: 1268 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1269 return 1; 1270 skip: 1271 scmd->result = SAM_STAT_GOOD; 1272 return 1; 1273 } 1274 1275 1276 /** 1277 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1278 * @qc: Storage for translated ATA taskfile 1279 * 1280 * Sets up an ATA taskfile to issue FLUSH CACHE or 1281 * FLUSH CACHE EXT. 1282 * 1283 * LOCKING: 1284 * spin_lock_irqsave(host lock) 1285 * 1286 * RETURNS: 1287 * Zero on success, non-zero on error. 1288 */ 1289 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1290 { 1291 struct ata_taskfile *tf = &qc->tf; 1292 1293 tf->flags |= ATA_TFLAG_DEVICE; 1294 tf->protocol = ATA_PROT_NODATA; 1295 1296 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1297 tf->command = ATA_CMD_FLUSH_EXT; 1298 else 1299 tf->command = ATA_CMD_FLUSH; 1300 1301 /* flush is critical for IO integrity, consider it an IO command */ 1302 qc->flags |= ATA_QCFLAG_IO; 1303 1304 return 0; 1305 } 1306 1307 /** 1308 * scsi_6_lba_len - Get LBA and transfer length 1309 * @cdb: SCSI command to translate 1310 * 1311 * Calculate LBA and transfer length for 6-byte commands. 1312 * 1313 * RETURNS: 1314 * @plba: the LBA 1315 * @plen: the transfer length 1316 */ 1317 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1318 { 1319 u64 lba = 0; 1320 u32 len; 1321 1322 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1323 lba |= ((u64)cdb[2]) << 8; 1324 lba |= ((u64)cdb[3]); 1325 1326 len = cdb[4]; 1327 1328 *plba = lba; 1329 *plen = len; 1330 } 1331 1332 /** 1333 * scsi_10_lba_len - Get LBA and transfer length 1334 * @cdb: SCSI command to translate 1335 * 1336 * Calculate LBA and transfer length for 10-byte commands. 1337 * 1338 * RETURNS: 1339 * @plba: the LBA 1340 * @plen: the transfer length 1341 */ 1342 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1343 { 1344 *plba = get_unaligned_be32(&cdb[2]); 1345 *plen = get_unaligned_be16(&cdb[7]); 1346 } 1347 1348 /** 1349 * scsi_16_lba_len - Get LBA and transfer length 1350 * @cdb: SCSI command to translate 1351 * 1352 * Calculate LBA and transfer length for 16-byte commands. 1353 * 1354 * RETURNS: 1355 * @plba: the LBA 1356 * @plen: the transfer length 1357 */ 1358 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1359 { 1360 *plba = get_unaligned_be64(&cdb[2]); 1361 *plen = get_unaligned_be32(&cdb[10]); 1362 } 1363 1364 /** 1365 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1366 * @qc: Storage for translated ATA taskfile 1367 * 1368 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1369 * 1370 * LOCKING: 1371 * spin_lock_irqsave(host lock) 1372 * 1373 * RETURNS: 1374 * Zero on success, non-zero on error. 1375 */ 1376 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1377 { 1378 struct scsi_cmnd *scmd = qc->scsicmd; 1379 struct ata_taskfile *tf = &qc->tf; 1380 struct ata_device *dev = qc->dev; 1381 u64 dev_sectors = qc->dev->n_sectors; 1382 const u8 *cdb = scmd->cmnd; 1383 u64 block; 1384 u32 n_block; 1385 u16 fp; 1386 1387 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1388 tf->protocol = ATA_PROT_NODATA; 1389 1390 switch (cdb[0]) { 1391 case VERIFY: 1392 if (scmd->cmd_len < 10) { 1393 fp = 9; 1394 goto invalid_fld; 1395 } 1396 scsi_10_lba_len(cdb, &block, &n_block); 1397 break; 1398 case VERIFY_16: 1399 if (scmd->cmd_len < 16) { 1400 fp = 15; 1401 goto invalid_fld; 1402 } 1403 scsi_16_lba_len(cdb, &block, &n_block); 1404 break; 1405 default: 1406 fp = 0; 1407 goto invalid_fld; 1408 } 1409 1410 if (!n_block) 1411 goto nothing_to_do; 1412 if (block >= dev_sectors) 1413 goto out_of_range; 1414 if ((block + n_block) > dev_sectors) 1415 goto out_of_range; 1416 1417 if (dev->flags & ATA_DFLAG_LBA) { 1418 tf->flags |= ATA_TFLAG_LBA; 1419 1420 if (lba_28_ok(block, n_block)) { 1421 /* use LBA28 */ 1422 tf->command = ATA_CMD_VERIFY; 1423 tf->device |= (block >> 24) & 0xf; 1424 } else if (lba_48_ok(block, n_block)) { 1425 if (!(dev->flags & ATA_DFLAG_LBA48)) 1426 goto out_of_range; 1427 1428 /* use LBA48 */ 1429 tf->flags |= ATA_TFLAG_LBA48; 1430 tf->command = ATA_CMD_VERIFY_EXT; 1431 1432 tf->hob_nsect = (n_block >> 8) & 0xff; 1433 1434 tf->hob_lbah = (block >> 40) & 0xff; 1435 tf->hob_lbam = (block >> 32) & 0xff; 1436 tf->hob_lbal = (block >> 24) & 0xff; 1437 } else 1438 /* request too large even for LBA48 */ 1439 goto out_of_range; 1440 1441 tf->nsect = n_block & 0xff; 1442 1443 tf->lbah = (block >> 16) & 0xff; 1444 tf->lbam = (block >> 8) & 0xff; 1445 tf->lbal = block & 0xff; 1446 1447 tf->device |= ATA_LBA; 1448 } else { 1449 /* CHS */ 1450 u32 sect, head, cyl, track; 1451 1452 if (!lba_28_ok(block, n_block)) 1453 goto out_of_range; 1454 1455 /* Convert LBA to CHS */ 1456 track = (u32)block / dev->sectors; 1457 cyl = track / dev->heads; 1458 head = track % dev->heads; 1459 sect = (u32)block % dev->sectors + 1; 1460 1461 /* Check whether the converted CHS can fit. 1462 Cylinder: 0-65535 1463 Head: 0-15 1464 Sector: 1-255*/ 1465 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1466 goto out_of_range; 1467 1468 tf->command = ATA_CMD_VERIFY; 1469 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1470 tf->lbal = sect; 1471 tf->lbam = cyl; 1472 tf->lbah = cyl >> 8; 1473 tf->device |= head; 1474 } 1475 1476 return 0; 1477 1478 invalid_fld: 1479 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1480 return 1; 1481 1482 out_of_range: 1483 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1484 /* "Logical Block Address out of range" */ 1485 return 1; 1486 1487 nothing_to_do: 1488 scmd->result = SAM_STAT_GOOD; 1489 return 1; 1490 } 1491 1492 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1493 { 1494 struct request *rq = scsi_cmd_to_rq(scmd); 1495 u32 req_blocks; 1496 1497 if (!blk_rq_is_passthrough(rq)) 1498 return true; 1499 1500 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1501 if (n_blocks > req_blocks) 1502 return false; 1503 1504 return true; 1505 } 1506 1507 /** 1508 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1509 * @qc: Storage for translated ATA taskfile 1510 * 1511 * Converts any of six SCSI read/write commands into the 1512 * ATA counterpart, including starting sector (LBA), 1513 * sector count, and taking into account the device's LBA48 1514 * support. 1515 * 1516 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1517 * %WRITE_16 are currently supported. 1518 * 1519 * LOCKING: 1520 * spin_lock_irqsave(host lock) 1521 * 1522 * RETURNS: 1523 * Zero on success, non-zero on error. 1524 */ 1525 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1526 { 1527 struct scsi_cmnd *scmd = qc->scsicmd; 1528 const u8 *cdb = scmd->cmnd; 1529 struct request *rq = scsi_cmd_to_rq(scmd); 1530 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1531 unsigned int tf_flags = 0; 1532 u64 block; 1533 u32 n_block; 1534 int rc; 1535 u16 fp = 0; 1536 1537 switch (cdb[0]) { 1538 case WRITE_6: 1539 case WRITE_10: 1540 case WRITE_16: 1541 tf_flags |= ATA_TFLAG_WRITE; 1542 break; 1543 } 1544 1545 /* Calculate the SCSI LBA, transfer length and FUA. */ 1546 switch (cdb[0]) { 1547 case READ_10: 1548 case WRITE_10: 1549 if (unlikely(scmd->cmd_len < 10)) { 1550 fp = 9; 1551 goto invalid_fld; 1552 } 1553 scsi_10_lba_len(cdb, &block, &n_block); 1554 if (cdb[1] & (1 << 3)) 1555 tf_flags |= ATA_TFLAG_FUA; 1556 if (!ata_check_nblocks(scmd, n_block)) 1557 goto invalid_fld; 1558 break; 1559 case READ_6: 1560 case WRITE_6: 1561 if (unlikely(scmd->cmd_len < 6)) { 1562 fp = 5; 1563 goto invalid_fld; 1564 } 1565 scsi_6_lba_len(cdb, &block, &n_block); 1566 1567 /* for 6-byte r/w commands, transfer length 0 1568 * means 256 blocks of data, not 0 block. 1569 */ 1570 if (!n_block) 1571 n_block = 256; 1572 if (!ata_check_nblocks(scmd, n_block)) 1573 goto invalid_fld; 1574 break; 1575 case READ_16: 1576 case WRITE_16: 1577 if (unlikely(scmd->cmd_len < 16)) { 1578 fp = 15; 1579 goto invalid_fld; 1580 } 1581 scsi_16_lba_len(cdb, &block, &n_block); 1582 if (cdb[1] & (1 << 3)) 1583 tf_flags |= ATA_TFLAG_FUA; 1584 if (!ata_check_nblocks(scmd, n_block)) 1585 goto invalid_fld; 1586 break; 1587 default: 1588 fp = 0; 1589 goto invalid_fld; 1590 } 1591 1592 /* Check and compose ATA command */ 1593 if (!n_block) 1594 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1595 * length 0 means transfer 0 block of data. 1596 * However, for ATA R/W commands, sector count 0 means 1597 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1598 * 1599 * WARNING: one or two older ATA drives treat 0 as 0... 1600 */ 1601 goto nothing_to_do; 1602 1603 qc->flags |= ATA_QCFLAG_IO; 1604 qc->nbytes = n_block * scmd->device->sector_size; 1605 1606 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, class); 1607 if (likely(rc == 0)) 1608 return 0; 1609 1610 if (rc == -ERANGE) 1611 goto out_of_range; 1612 /* treat all other errors as -EINVAL, fall through */ 1613 invalid_fld: 1614 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1615 return 1; 1616 1617 out_of_range: 1618 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1619 /* "Logical Block Address out of range" */ 1620 return 1; 1621 1622 nothing_to_do: 1623 scmd->result = SAM_STAT_GOOD; 1624 return 1; 1625 } 1626 1627 static void ata_qc_done(struct ata_queued_cmd *qc) 1628 { 1629 struct scsi_cmnd *cmd = qc->scsicmd; 1630 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1631 1632 ata_qc_free(qc); 1633 done(cmd); 1634 } 1635 1636 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1637 { 1638 struct ata_port *ap = qc->ap; 1639 struct scsi_cmnd *cmd = qc->scsicmd; 1640 u8 *cdb = cmd->cmnd; 1641 int need_sense = (qc->err_mask != 0); 1642 1643 /* For ATA pass thru (SAT) commands, generate a sense block if 1644 * user mandated it or if there's an error. Note that if we 1645 * generate because the user forced us to [CK_COND =1], a check 1646 * condition is generated and the ATA register values are returned 1647 * whether the command completed successfully or not. If there 1648 * was no error, we use the following sense data: 1649 * sk = RECOVERED ERROR 1650 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1651 */ 1652 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1653 ((cdb[2] & 0x20) || need_sense)) 1654 ata_gen_passthru_sense(qc); 1655 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1656 cmd->result = SAM_STAT_CHECK_CONDITION; 1657 else if (need_sense) 1658 ata_gen_ata_sense(qc); 1659 else 1660 cmd->result = SAM_STAT_GOOD; 1661 1662 if (need_sense && !ap->ops->error_handler) 1663 ata_dump_status(ap, &qc->result_tf); 1664 1665 ata_qc_done(qc); 1666 } 1667 1668 /** 1669 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1670 * @dev: ATA device to which the command is addressed 1671 * @cmd: SCSI command to execute 1672 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1673 * 1674 * Our ->queuecommand() function has decided that the SCSI 1675 * command issued can be directly translated into an ATA 1676 * command, rather than handled internally. 1677 * 1678 * This function sets up an ata_queued_cmd structure for the 1679 * SCSI command, and sends that ata_queued_cmd to the hardware. 1680 * 1681 * The xlat_func argument (actor) returns 0 if ready to execute 1682 * ATA command, else 1 to finish translation. If 1 is returned 1683 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1684 * to be set reflecting an error condition or clean (early) 1685 * termination. 1686 * 1687 * LOCKING: 1688 * spin_lock_irqsave(host lock) 1689 * 1690 * RETURNS: 1691 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1692 * needs to be deferred. 1693 */ 1694 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1695 ata_xlat_func_t xlat_func) 1696 { 1697 struct ata_port *ap = dev->link->ap; 1698 struct ata_queued_cmd *qc; 1699 int rc; 1700 1701 qc = ata_scsi_qc_new(dev, cmd); 1702 if (!qc) 1703 goto err_mem; 1704 1705 /* data is present; dma-map it */ 1706 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1707 cmd->sc_data_direction == DMA_TO_DEVICE) { 1708 if (unlikely(scsi_bufflen(cmd) < 1)) { 1709 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1710 goto err_did; 1711 } 1712 1713 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1714 1715 qc->dma_dir = cmd->sc_data_direction; 1716 } 1717 1718 qc->complete_fn = ata_scsi_qc_complete; 1719 1720 if (xlat_func(qc)) 1721 goto early_finish; 1722 1723 if (ap->ops->qc_defer) { 1724 if ((rc = ap->ops->qc_defer(qc))) 1725 goto defer; 1726 } 1727 1728 /* select device, send command to hardware */ 1729 ata_qc_issue(qc); 1730 1731 return 0; 1732 1733 early_finish: 1734 ata_qc_free(qc); 1735 scsi_done(cmd); 1736 return 0; 1737 1738 err_did: 1739 ata_qc_free(qc); 1740 cmd->result = (DID_ERROR << 16); 1741 scsi_done(cmd); 1742 err_mem: 1743 return 0; 1744 1745 defer: 1746 ata_qc_free(qc); 1747 if (rc == ATA_DEFER_LINK) 1748 return SCSI_MLQUEUE_DEVICE_BUSY; 1749 else 1750 return SCSI_MLQUEUE_HOST_BUSY; 1751 } 1752 1753 struct ata_scsi_args { 1754 struct ata_device *dev; 1755 u16 *id; 1756 struct scsi_cmnd *cmd; 1757 }; 1758 1759 /** 1760 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1761 * @args: device IDENTIFY data / SCSI command of interest. 1762 * @actor: Callback hook for desired SCSI command simulator 1763 * 1764 * Takes care of the hard work of simulating a SCSI command... 1765 * Mapping the response buffer, calling the command's handler, 1766 * and handling the handler's return value. This return value 1767 * indicates whether the handler wishes the SCSI command to be 1768 * completed successfully (0), or not (in which case cmd->result 1769 * and sense buffer are assumed to be set). 1770 * 1771 * LOCKING: 1772 * spin_lock_irqsave(host lock) 1773 */ 1774 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1775 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1776 { 1777 unsigned int rc; 1778 struct scsi_cmnd *cmd = args->cmd; 1779 unsigned long flags; 1780 1781 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1782 1783 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1784 rc = actor(args, ata_scsi_rbuf); 1785 if (rc == 0) 1786 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1787 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1788 1789 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1790 1791 if (rc == 0) 1792 cmd->result = SAM_STAT_GOOD; 1793 } 1794 1795 /** 1796 * ata_scsiop_inq_std - Simulate INQUIRY command 1797 * @args: device IDENTIFY data / SCSI command of interest. 1798 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1799 * 1800 * Returns standard device identification data associated 1801 * with non-VPD INQUIRY command output. 1802 * 1803 * LOCKING: 1804 * spin_lock_irqsave(host lock) 1805 */ 1806 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1807 { 1808 static const u8 versions[] = { 1809 0x00, 1810 0x60, /* SAM-3 (no version claimed) */ 1811 1812 0x03, 1813 0x20, /* SBC-2 (no version claimed) */ 1814 1815 0x03, 1816 0x00 /* SPC-3 (no version claimed) */ 1817 }; 1818 static const u8 versions_zbc[] = { 1819 0x00, 1820 0xA0, /* SAM-5 (no version claimed) */ 1821 1822 0x06, 1823 0x00, /* SBC-4 (no version claimed) */ 1824 1825 0x05, 1826 0xC0, /* SPC-5 (no version claimed) */ 1827 1828 0x60, 1829 0x24, /* ZBC r05 */ 1830 }; 1831 1832 u8 hdr[] = { 1833 TYPE_DISK, 1834 0, 1835 0x5, /* claim SPC-3 version compatibility */ 1836 2, 1837 95 - 4, 1838 0, 1839 0, 1840 2 1841 }; 1842 1843 /* set scsi removable (RMB) bit per ata bit, or if the 1844 * AHCI port says it's external (Hotplug-capable, eSATA). 1845 */ 1846 if (ata_id_removable(args->id) || 1847 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1848 hdr[1] |= (1 << 7); 1849 1850 if (args->dev->class == ATA_DEV_ZAC) { 1851 hdr[0] = TYPE_ZBC; 1852 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1853 } 1854 1855 memcpy(rbuf, hdr, sizeof(hdr)); 1856 memcpy(&rbuf[8], "ATA ", 8); 1857 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1858 1859 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1860 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1861 if (strncmp(&rbuf[32], " ", 4) == 0) 1862 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1863 1864 if (rbuf[32] == 0 || rbuf[32] == ' ') 1865 memcpy(&rbuf[32], "n/a ", 4); 1866 1867 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1868 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1869 else 1870 memcpy(rbuf + 58, versions, sizeof(versions)); 1871 1872 return 0; 1873 } 1874 1875 /** 1876 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1877 * @args: device IDENTIFY data / SCSI command of interest. 1878 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1879 * 1880 * Returns list of inquiry VPD pages available. 1881 * 1882 * LOCKING: 1883 * spin_lock_irqsave(host lock) 1884 */ 1885 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1886 { 1887 int i, num_pages = 0; 1888 static const u8 pages[] = { 1889 0x00, /* page 0x00, this page */ 1890 0x80, /* page 0x80, unit serial no page */ 1891 0x83, /* page 0x83, device ident page */ 1892 0x89, /* page 0x89, ata info page */ 1893 0xb0, /* page 0xb0, block limits page */ 1894 0xb1, /* page 0xb1, block device characteristics page */ 1895 0xb2, /* page 0xb2, thin provisioning page */ 1896 0xb6, /* page 0xb6, zoned block device characteristics */ 1897 0xb9, /* page 0xb9, concurrent positioning ranges */ 1898 }; 1899 1900 for (i = 0; i < sizeof(pages); i++) { 1901 if (pages[i] == 0xb6 && 1902 !(args->dev->flags & ATA_DFLAG_ZAC)) 1903 continue; 1904 rbuf[num_pages + 4] = pages[i]; 1905 num_pages++; 1906 } 1907 rbuf[3] = num_pages; /* number of supported VPD pages */ 1908 return 0; 1909 } 1910 1911 /** 1912 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1913 * @args: device IDENTIFY data / SCSI command of interest. 1914 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1915 * 1916 * Returns ATA device serial number. 1917 * 1918 * LOCKING: 1919 * spin_lock_irqsave(host lock) 1920 */ 1921 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1922 { 1923 static const u8 hdr[] = { 1924 0, 1925 0x80, /* this page code */ 1926 0, 1927 ATA_ID_SERNO_LEN, /* page len */ 1928 }; 1929 1930 memcpy(rbuf, hdr, sizeof(hdr)); 1931 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1932 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1933 return 0; 1934 } 1935 1936 /** 1937 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1938 * @args: device IDENTIFY data / SCSI command of interest. 1939 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1940 * 1941 * Yields two logical unit device identification designators: 1942 * - vendor specific ASCII containing the ATA serial number 1943 * - SAT defined "t10 vendor id based" containing ASCII vendor 1944 * name ("ATA "), model and serial numbers. 1945 * 1946 * LOCKING: 1947 * spin_lock_irqsave(host lock) 1948 */ 1949 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 1950 { 1951 const int sat_model_serial_desc_len = 68; 1952 int num; 1953 1954 rbuf[1] = 0x83; /* this page code */ 1955 num = 4; 1956 1957 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1958 rbuf[num + 0] = 2; 1959 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1960 num += 4; 1961 ata_id_string(args->id, (unsigned char *) rbuf + num, 1962 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1963 num += ATA_ID_SERNO_LEN; 1964 1965 /* SAT defined lu model and serial numbers descriptor */ 1966 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 1967 rbuf[num + 0] = 2; 1968 rbuf[num + 1] = 1; 1969 rbuf[num + 3] = sat_model_serial_desc_len; 1970 num += 4; 1971 memcpy(rbuf + num, "ATA ", 8); 1972 num += 8; 1973 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 1974 ATA_ID_PROD_LEN); 1975 num += ATA_ID_PROD_LEN; 1976 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 1977 ATA_ID_SERNO_LEN); 1978 num += ATA_ID_SERNO_LEN; 1979 1980 if (ata_id_has_wwn(args->id)) { 1981 /* SAT defined lu world wide name */ 1982 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 1983 rbuf[num + 0] = 1; 1984 rbuf[num + 1] = 3; 1985 rbuf[num + 3] = ATA_ID_WWN_LEN; 1986 num += 4; 1987 ata_id_string(args->id, (unsigned char *) rbuf + num, 1988 ATA_ID_WWN, ATA_ID_WWN_LEN); 1989 num += ATA_ID_WWN_LEN; 1990 } 1991 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 1992 return 0; 1993 } 1994 1995 /** 1996 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 1997 * @args: device IDENTIFY data / SCSI command of interest. 1998 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1999 * 2000 * Yields SAT-specified ATA VPD page. 2001 * 2002 * LOCKING: 2003 * spin_lock_irqsave(host lock) 2004 */ 2005 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2006 { 2007 rbuf[1] = 0x89; /* our page code */ 2008 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2009 rbuf[3] = (0x238 & 0xff); 2010 2011 memcpy(&rbuf[8], "linux ", 8); 2012 memcpy(&rbuf[16], "libata ", 16); 2013 memcpy(&rbuf[32], DRV_VERSION, 4); 2014 2015 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2016 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2017 /* TODO: PMP? */ 2018 2019 /* we don't store the ATA device signature, so we fake it */ 2020 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2021 rbuf[40] = 0x1; 2022 rbuf[48] = 0x1; 2023 2024 rbuf[56] = ATA_CMD_ID_ATA; 2025 2026 memcpy(&rbuf[60], &args->id[0], 512); 2027 return 0; 2028 } 2029 2030 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2031 { 2032 struct ata_device *dev = args->dev; 2033 u16 min_io_sectors; 2034 2035 rbuf[1] = 0xb0; 2036 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2037 2038 /* 2039 * Optimal transfer length granularity. 2040 * 2041 * This is always one physical block, but for disks with a smaller 2042 * logical than physical sector size we need to figure out what the 2043 * latter is. 2044 */ 2045 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2046 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2047 2048 /* 2049 * Optimal unmap granularity. 2050 * 2051 * The ATA spec doesn't even know about a granularity or alignment 2052 * for the TRIM command. We can leave away most of the unmap related 2053 * VPD page entries, but we have specifify a granularity to signal 2054 * that we support some form of unmap - in thise case via WRITE SAME 2055 * with the unmap bit set. 2056 */ 2057 if (ata_id_has_trim(args->id)) { 2058 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2059 2060 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2061 max_blocks = 128 << (20 - SECTOR_SHIFT); 2062 2063 put_unaligned_be64(max_blocks, &rbuf[36]); 2064 put_unaligned_be32(1, &rbuf[28]); 2065 } 2066 2067 return 0; 2068 } 2069 2070 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2071 { 2072 int form_factor = ata_id_form_factor(args->id); 2073 int media_rotation_rate = ata_id_rotation_rate(args->id); 2074 u8 zoned = ata_id_zoned_cap(args->id); 2075 2076 rbuf[1] = 0xb1; 2077 rbuf[3] = 0x3c; 2078 rbuf[4] = media_rotation_rate >> 8; 2079 rbuf[5] = media_rotation_rate; 2080 rbuf[7] = form_factor; 2081 if (zoned) 2082 rbuf[8] = (zoned << 4); 2083 2084 return 0; 2085 } 2086 2087 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2088 { 2089 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2090 rbuf[1] = 0xb2; 2091 rbuf[3] = 0x4; 2092 rbuf[5] = 1 << 6; /* TPWS */ 2093 2094 return 0; 2095 } 2096 2097 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2098 { 2099 /* 2100 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2101 */ 2102 rbuf[1] = 0xb6; 2103 rbuf[3] = 0x3C; 2104 2105 /* 2106 * URSWRZ bit is only meaningful for host-managed ZAC drives 2107 */ 2108 if (args->dev->zac_zoned_cap & 1) 2109 rbuf[4] |= 1; 2110 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2111 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2112 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2113 2114 return 0; 2115 } 2116 2117 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2118 { 2119 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2120 u8 *desc = &rbuf[64]; 2121 int i; 2122 2123 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2124 rbuf[1] = 0xb9; 2125 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2126 2127 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2128 desc[0] = cpr_log->cpr[i].num; 2129 desc[1] = cpr_log->cpr[i].num_storage_elements; 2130 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2131 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2132 } 2133 2134 return 0; 2135 } 2136 2137 /** 2138 * modecpy - Prepare response for MODE SENSE 2139 * @dest: output buffer 2140 * @src: data being copied 2141 * @n: length of mode page 2142 * @changeable: whether changeable parameters are requested 2143 * 2144 * Generate a generic MODE SENSE page for either current or changeable 2145 * parameters. 2146 * 2147 * LOCKING: 2148 * None. 2149 */ 2150 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2151 { 2152 if (changeable) { 2153 memcpy(dest, src, 2); 2154 memset(dest + 2, 0, n - 2); 2155 } else { 2156 memcpy(dest, src, n); 2157 } 2158 } 2159 2160 /** 2161 * ata_msense_caching - Simulate MODE SENSE caching info page 2162 * @id: device IDENTIFY data 2163 * @buf: output buffer 2164 * @changeable: whether changeable parameters are requested 2165 * 2166 * Generate a caching info page, which conditionally indicates 2167 * write caching to the SCSI layer, depending on device 2168 * capabilities. 2169 * 2170 * LOCKING: 2171 * None. 2172 */ 2173 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2174 { 2175 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2176 if (changeable) { 2177 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2178 } else { 2179 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2180 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2181 } 2182 return sizeof(def_cache_mpage); 2183 } 2184 2185 /** 2186 * ata_msense_control - Simulate MODE SENSE control mode page 2187 * @dev: ATA device of interest 2188 * @buf: output buffer 2189 * @changeable: whether changeable parameters are requested 2190 * 2191 * Generate a generic MODE SENSE control mode page. 2192 * 2193 * LOCKING: 2194 * None. 2195 */ 2196 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2197 bool changeable) 2198 { 2199 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2200 if (changeable) { 2201 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2202 } else { 2203 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2204 2205 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2206 } 2207 return sizeof(def_control_mpage); 2208 } 2209 2210 /** 2211 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2212 * @buf: output buffer 2213 * @changeable: whether changeable parameters are requested 2214 * 2215 * Generate a generic MODE SENSE r/w error recovery page. 2216 * 2217 * LOCKING: 2218 * None. 2219 */ 2220 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2221 { 2222 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2223 changeable); 2224 return sizeof(def_rw_recovery_mpage); 2225 } 2226 2227 /* 2228 * We can turn this into a real blacklist if it's needed, for now just 2229 * blacklist any Maxtor BANC1G10 revision firmware 2230 */ 2231 static int ata_dev_supports_fua(u16 *id) 2232 { 2233 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2234 2235 if (!libata_fua) 2236 return 0; 2237 if (!ata_id_has_fua(id)) 2238 return 0; 2239 2240 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2241 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2242 2243 if (strcmp(model, "Maxtor")) 2244 return 1; 2245 if (strcmp(fw, "BANC1G10")) 2246 return 1; 2247 2248 return 0; /* blacklisted */ 2249 } 2250 2251 /** 2252 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2253 * @args: device IDENTIFY data / SCSI command of interest. 2254 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2255 * 2256 * Simulate MODE SENSE commands. Assume this is invoked for direct 2257 * access devices (e.g. disks) only. There should be no block 2258 * descriptor for other device types. 2259 * 2260 * LOCKING: 2261 * spin_lock_irqsave(host lock) 2262 */ 2263 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2264 { 2265 struct ata_device *dev = args->dev; 2266 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2267 static const u8 sat_blk_desc[] = { 2268 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2269 0, 2270 0, 0x2, 0x0 /* block length: 512 bytes */ 2271 }; 2272 u8 pg, spg; 2273 unsigned int ebd, page_control, six_byte; 2274 u8 dpofua, bp = 0xff; 2275 u16 fp; 2276 2277 six_byte = (scsicmd[0] == MODE_SENSE); 2278 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2279 /* 2280 * LLBA bit in msense(10) ignored (compliant) 2281 */ 2282 2283 page_control = scsicmd[2] >> 6; 2284 switch (page_control) { 2285 case 0: /* current */ 2286 case 1: /* changeable */ 2287 case 2: /* defaults */ 2288 break; /* supported */ 2289 case 3: /* saved */ 2290 goto saving_not_supp; 2291 default: 2292 fp = 2; 2293 bp = 6; 2294 goto invalid_fld; 2295 } 2296 2297 if (six_byte) 2298 p += 4 + (ebd ? 8 : 0); 2299 else 2300 p += 8 + (ebd ? 8 : 0); 2301 2302 pg = scsicmd[2] & 0x3f; 2303 spg = scsicmd[3]; 2304 /* 2305 * No mode subpages supported (yet) but asking for _all_ 2306 * subpages may be valid 2307 */ 2308 if (spg && (spg != ALL_SUB_MPAGES)) { 2309 fp = 3; 2310 goto invalid_fld; 2311 } 2312 2313 switch(pg) { 2314 case RW_RECOVERY_MPAGE: 2315 p += ata_msense_rw_recovery(p, page_control == 1); 2316 break; 2317 2318 case CACHE_MPAGE: 2319 p += ata_msense_caching(args->id, p, page_control == 1); 2320 break; 2321 2322 case CONTROL_MPAGE: 2323 p += ata_msense_control(args->dev, p, page_control == 1); 2324 break; 2325 2326 case ALL_MPAGES: 2327 p += ata_msense_rw_recovery(p, page_control == 1); 2328 p += ata_msense_caching(args->id, p, page_control == 1); 2329 p += ata_msense_control(args->dev, p, page_control == 1); 2330 break; 2331 2332 default: /* invalid page code */ 2333 fp = 2; 2334 goto invalid_fld; 2335 } 2336 2337 dpofua = 0; 2338 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2339 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2340 dpofua = 1 << 4; 2341 2342 if (six_byte) { 2343 rbuf[0] = p - rbuf - 1; 2344 rbuf[2] |= dpofua; 2345 if (ebd) { 2346 rbuf[3] = sizeof(sat_blk_desc); 2347 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2348 } 2349 } else { 2350 unsigned int output_len = p - rbuf - 2; 2351 2352 rbuf[0] = output_len >> 8; 2353 rbuf[1] = output_len; 2354 rbuf[3] |= dpofua; 2355 if (ebd) { 2356 rbuf[7] = sizeof(sat_blk_desc); 2357 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2358 } 2359 } 2360 return 0; 2361 2362 invalid_fld: 2363 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2364 return 1; 2365 2366 saving_not_supp: 2367 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2368 /* "Saving parameters not supported" */ 2369 return 1; 2370 } 2371 2372 /** 2373 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2374 * @args: device IDENTIFY data / SCSI command of interest. 2375 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2376 * 2377 * Simulate READ CAPACITY commands. 2378 * 2379 * LOCKING: 2380 * None. 2381 */ 2382 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2383 { 2384 struct ata_device *dev = args->dev; 2385 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2386 u32 sector_size; /* physical sector size in bytes */ 2387 u8 log2_per_phys; 2388 u16 lowest_aligned; 2389 2390 sector_size = ata_id_logical_sector_size(dev->id); 2391 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2392 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2393 2394 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2395 if (last_lba >= 0xffffffffULL) 2396 last_lba = 0xffffffff; 2397 2398 /* sector count, 32-bit */ 2399 rbuf[0] = last_lba >> (8 * 3); 2400 rbuf[1] = last_lba >> (8 * 2); 2401 rbuf[2] = last_lba >> (8 * 1); 2402 rbuf[3] = last_lba; 2403 2404 /* sector size */ 2405 rbuf[4] = sector_size >> (8 * 3); 2406 rbuf[5] = sector_size >> (8 * 2); 2407 rbuf[6] = sector_size >> (8 * 1); 2408 rbuf[7] = sector_size; 2409 } else { 2410 /* sector count, 64-bit */ 2411 rbuf[0] = last_lba >> (8 * 7); 2412 rbuf[1] = last_lba >> (8 * 6); 2413 rbuf[2] = last_lba >> (8 * 5); 2414 rbuf[3] = last_lba >> (8 * 4); 2415 rbuf[4] = last_lba >> (8 * 3); 2416 rbuf[5] = last_lba >> (8 * 2); 2417 rbuf[6] = last_lba >> (8 * 1); 2418 rbuf[7] = last_lba; 2419 2420 /* sector size */ 2421 rbuf[ 8] = sector_size >> (8 * 3); 2422 rbuf[ 9] = sector_size >> (8 * 2); 2423 rbuf[10] = sector_size >> (8 * 1); 2424 rbuf[11] = sector_size; 2425 2426 rbuf[12] = 0; 2427 rbuf[13] = log2_per_phys; 2428 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2429 rbuf[15] = lowest_aligned; 2430 2431 if (ata_id_has_trim(args->id) && 2432 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2433 rbuf[14] |= 0x80; /* LBPME */ 2434 2435 if (ata_id_has_zero_after_trim(args->id) && 2436 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2437 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2438 rbuf[14] |= 0x40; /* LBPRZ */ 2439 } 2440 } 2441 if (ata_id_zoned_cap(args->id) || 2442 args->dev->class == ATA_DEV_ZAC) 2443 rbuf[12] = (1 << 4); /* RC_BASIS */ 2444 } 2445 return 0; 2446 } 2447 2448 /** 2449 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2450 * @args: device IDENTIFY data / SCSI command of interest. 2451 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2452 * 2453 * Simulate REPORT LUNS command. 2454 * 2455 * LOCKING: 2456 * spin_lock_irqsave(host lock) 2457 */ 2458 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2459 { 2460 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2461 2462 return 0; 2463 } 2464 2465 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2466 { 2467 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2468 /* FIXME: not quite right; we don't want the 2469 * translation of taskfile registers into 2470 * a sense descriptors, since that's only 2471 * correct for ATA, not ATAPI 2472 */ 2473 ata_gen_passthru_sense(qc); 2474 } 2475 2476 ata_qc_done(qc); 2477 } 2478 2479 /* is it pointless to prefer PIO for "safety reasons"? */ 2480 static inline int ata_pio_use_silly(struct ata_port *ap) 2481 { 2482 return (ap->flags & ATA_FLAG_PIO_DMA); 2483 } 2484 2485 static void atapi_request_sense(struct ata_queued_cmd *qc) 2486 { 2487 struct ata_port *ap = qc->ap; 2488 struct scsi_cmnd *cmd = qc->scsicmd; 2489 2490 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2491 2492 #ifdef CONFIG_ATA_SFF 2493 if (ap->ops->sff_tf_read) 2494 ap->ops->sff_tf_read(ap, &qc->tf); 2495 #endif 2496 2497 /* fill these in, for the case where they are -not- overwritten */ 2498 cmd->sense_buffer[0] = 0x70; 2499 cmd->sense_buffer[2] = qc->tf.error >> 4; 2500 2501 ata_qc_reinit(qc); 2502 2503 /* setup sg table and init transfer direction */ 2504 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2505 ata_sg_init(qc, &qc->sgent, 1); 2506 qc->dma_dir = DMA_FROM_DEVICE; 2507 2508 memset(&qc->cdb, 0, qc->dev->cdb_len); 2509 qc->cdb[0] = REQUEST_SENSE; 2510 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2511 2512 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2513 qc->tf.command = ATA_CMD_PACKET; 2514 2515 if (ata_pio_use_silly(ap)) { 2516 qc->tf.protocol = ATAPI_PROT_DMA; 2517 qc->tf.feature |= ATAPI_PKT_DMA; 2518 } else { 2519 qc->tf.protocol = ATAPI_PROT_PIO; 2520 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2521 qc->tf.lbah = 0; 2522 } 2523 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2524 2525 qc->complete_fn = atapi_sense_complete; 2526 2527 ata_qc_issue(qc); 2528 } 2529 2530 /* 2531 * ATAPI devices typically report zero for their SCSI version, and sometimes 2532 * deviate from the spec WRT response data format. If SCSI version is 2533 * reported as zero like normal, then we make the following fixups: 2534 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2535 * modern device. 2536 * 2) Ensure response data format / ATAPI information are always correct. 2537 */ 2538 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2539 { 2540 u8 buf[4]; 2541 2542 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2543 if (buf[2] == 0) { 2544 buf[2] = 0x5; 2545 buf[3] = 0x32; 2546 } 2547 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2548 } 2549 2550 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2551 { 2552 struct scsi_cmnd *cmd = qc->scsicmd; 2553 unsigned int err_mask = qc->err_mask; 2554 2555 /* handle completion from new EH */ 2556 if (unlikely(qc->ap->ops->error_handler && 2557 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2558 2559 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2560 /* FIXME: not quite right; we don't want the 2561 * translation of taskfile registers into a 2562 * sense descriptors, since that's only 2563 * correct for ATA, not ATAPI 2564 */ 2565 ata_gen_passthru_sense(qc); 2566 } 2567 2568 /* SCSI EH automatically locks door if sdev->locked is 2569 * set. Sometimes door lock request continues to 2570 * fail, for example, when no media is present. This 2571 * creates a loop - SCSI EH issues door lock which 2572 * fails and gets invoked again to acquire sense data 2573 * for the failed command. 2574 * 2575 * If door lock fails, always clear sdev->locked to 2576 * avoid this infinite loop. 2577 * 2578 * This may happen before SCSI scan is complete. Make 2579 * sure qc->dev->sdev isn't NULL before dereferencing. 2580 */ 2581 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2582 qc->dev->sdev->locked = 0; 2583 2584 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2585 ata_qc_done(qc); 2586 return; 2587 } 2588 2589 /* successful completion or old EH failure path */ 2590 if (unlikely(err_mask & AC_ERR_DEV)) { 2591 cmd->result = SAM_STAT_CHECK_CONDITION; 2592 atapi_request_sense(qc); 2593 return; 2594 } else if (unlikely(err_mask)) { 2595 /* FIXME: not quite right; we don't want the 2596 * translation of taskfile registers into 2597 * a sense descriptors, since that's only 2598 * correct for ATA, not ATAPI 2599 */ 2600 ata_gen_passthru_sense(qc); 2601 } else { 2602 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2603 atapi_fixup_inquiry(cmd); 2604 cmd->result = SAM_STAT_GOOD; 2605 } 2606 2607 ata_qc_done(qc); 2608 } 2609 /** 2610 * atapi_xlat - Initialize PACKET taskfile 2611 * @qc: command structure to be initialized 2612 * 2613 * LOCKING: 2614 * spin_lock_irqsave(host lock) 2615 * 2616 * RETURNS: 2617 * Zero on success, non-zero on failure. 2618 */ 2619 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2620 { 2621 struct scsi_cmnd *scmd = qc->scsicmd; 2622 struct ata_device *dev = qc->dev; 2623 int nodata = (scmd->sc_data_direction == DMA_NONE); 2624 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2625 unsigned int nbytes; 2626 2627 memset(qc->cdb, 0, dev->cdb_len); 2628 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2629 2630 qc->complete_fn = atapi_qc_complete; 2631 2632 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2633 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2634 qc->tf.flags |= ATA_TFLAG_WRITE; 2635 } 2636 2637 qc->tf.command = ATA_CMD_PACKET; 2638 ata_qc_set_pc_nbytes(qc); 2639 2640 /* check whether ATAPI DMA is safe */ 2641 if (!nodata && !using_pio && atapi_check_dma(qc)) 2642 using_pio = 1; 2643 2644 /* Some controller variants snoop this value for Packet 2645 * transfers to do state machine and FIFO management. Thus we 2646 * want to set it properly, and for DMA where it is 2647 * effectively meaningless. 2648 */ 2649 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2650 2651 /* Most ATAPI devices which honor transfer chunk size don't 2652 * behave according to the spec when odd chunk size which 2653 * matches the transfer length is specified. If the number of 2654 * bytes to transfer is 2n+1. According to the spec, what 2655 * should happen is to indicate that 2n+1 is going to be 2656 * transferred and transfer 2n+2 bytes where the last byte is 2657 * padding. 2658 * 2659 * In practice, this doesn't happen. ATAPI devices first 2660 * indicate and transfer 2n bytes and then indicate and 2661 * transfer 2 bytes where the last byte is padding. 2662 * 2663 * This inconsistency confuses several controllers which 2664 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2665 * These controllers use actual number of transferred bytes to 2666 * update DMA pointer and transfer of 4n+2 bytes make those 2667 * controller push DMA pointer by 4n+4 bytes because SATA data 2668 * FISes are aligned to 4 bytes. This causes data corruption 2669 * and buffer overrun. 2670 * 2671 * Always setting nbytes to even number solves this problem 2672 * because then ATAPI devices don't have to split data at 2n 2673 * boundaries. 2674 */ 2675 if (nbytes & 0x1) 2676 nbytes++; 2677 2678 qc->tf.lbam = (nbytes & 0xFF); 2679 qc->tf.lbah = (nbytes >> 8); 2680 2681 if (nodata) 2682 qc->tf.protocol = ATAPI_PROT_NODATA; 2683 else if (using_pio) 2684 qc->tf.protocol = ATAPI_PROT_PIO; 2685 else { 2686 /* DMA data xfer */ 2687 qc->tf.protocol = ATAPI_PROT_DMA; 2688 qc->tf.feature |= ATAPI_PKT_DMA; 2689 2690 if ((dev->flags & ATA_DFLAG_DMADIR) && 2691 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2692 /* some SATA bridges need us to indicate data xfer direction */ 2693 qc->tf.feature |= ATAPI_DMADIR; 2694 } 2695 2696 2697 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2698 as ATAPI tape drives don't get this right otherwise */ 2699 return 0; 2700 } 2701 2702 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2703 { 2704 if (!sata_pmp_attached(ap)) { 2705 if (likely(devno >= 0 && 2706 devno < ata_link_max_devices(&ap->link))) 2707 return &ap->link.device[devno]; 2708 } else { 2709 if (likely(devno >= 0 && 2710 devno < ap->nr_pmp_links)) 2711 return &ap->pmp_link[devno].device[0]; 2712 } 2713 2714 return NULL; 2715 } 2716 2717 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2718 const struct scsi_device *scsidev) 2719 { 2720 int devno; 2721 2722 /* skip commands not addressed to targets we simulate */ 2723 if (!sata_pmp_attached(ap)) { 2724 if (unlikely(scsidev->channel || scsidev->lun)) 2725 return NULL; 2726 devno = scsidev->id; 2727 } else { 2728 if (unlikely(scsidev->id || scsidev->lun)) 2729 return NULL; 2730 devno = scsidev->channel; 2731 } 2732 2733 return ata_find_dev(ap, devno); 2734 } 2735 2736 /** 2737 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2738 * @ap: ATA port to which the device is attached 2739 * @scsidev: SCSI device from which we derive the ATA device 2740 * 2741 * Given various information provided in struct scsi_cmnd, 2742 * map that onto an ATA bus, and using that mapping 2743 * determine which ata_device is associated with the 2744 * SCSI command to be sent. 2745 * 2746 * LOCKING: 2747 * spin_lock_irqsave(host lock) 2748 * 2749 * RETURNS: 2750 * Associated ATA device, or %NULL if not found. 2751 */ 2752 struct ata_device * 2753 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2754 { 2755 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2756 2757 if (unlikely(!dev || !ata_dev_enabled(dev))) 2758 return NULL; 2759 2760 return dev; 2761 } 2762 2763 /* 2764 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2765 * @byte1: Byte 1 from pass-thru CDB. 2766 * 2767 * RETURNS: 2768 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2769 */ 2770 static u8 2771 ata_scsi_map_proto(u8 byte1) 2772 { 2773 switch((byte1 & 0x1e) >> 1) { 2774 case 3: /* Non-data */ 2775 return ATA_PROT_NODATA; 2776 2777 case 6: /* DMA */ 2778 case 10: /* UDMA Data-in */ 2779 case 11: /* UDMA Data-Out */ 2780 return ATA_PROT_DMA; 2781 2782 case 4: /* PIO Data-in */ 2783 case 5: /* PIO Data-out */ 2784 return ATA_PROT_PIO; 2785 2786 case 12: /* FPDMA */ 2787 return ATA_PROT_NCQ; 2788 2789 case 0: /* Hard Reset */ 2790 case 1: /* SRST */ 2791 case 8: /* Device Diagnostic */ 2792 case 9: /* Device Reset */ 2793 case 7: /* DMA Queued */ 2794 case 15: /* Return Response Info */ 2795 default: /* Reserved */ 2796 break; 2797 } 2798 2799 return ATA_PROT_UNKNOWN; 2800 } 2801 2802 /** 2803 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2804 * @qc: command structure to be initialized 2805 * 2806 * Handles either 12, 16, or 32-byte versions of the CDB. 2807 * 2808 * RETURNS: 2809 * Zero on success, non-zero on failure. 2810 */ 2811 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2812 { 2813 struct ata_taskfile *tf = &(qc->tf); 2814 struct scsi_cmnd *scmd = qc->scsicmd; 2815 struct ata_device *dev = qc->dev; 2816 const u8 *cdb = scmd->cmnd; 2817 u16 fp; 2818 u16 cdb_offset = 0; 2819 2820 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2821 if (cdb[0] == VARIABLE_LENGTH_CMD) 2822 cdb_offset = 9; 2823 2824 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2825 if (tf->protocol == ATA_PROT_UNKNOWN) { 2826 fp = 1; 2827 goto invalid_fld; 2828 } 2829 2830 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 2831 /* 2832 * When T_LENGTH is zero (No data is transferred), dir should 2833 * be DMA_NONE. 2834 */ 2835 if (scmd->sc_data_direction != DMA_NONE) { 2836 fp = 2 + cdb_offset; 2837 goto invalid_fld; 2838 } 2839 2840 if (ata_is_ncq(tf->protocol)) 2841 tf->protocol = ATA_PROT_NCQ_NODATA; 2842 } 2843 2844 /* enable LBA */ 2845 tf->flags |= ATA_TFLAG_LBA; 2846 2847 /* 2848 * 12 and 16 byte CDBs use different offsets to 2849 * provide the various register values. 2850 */ 2851 switch (cdb[0]) { 2852 case ATA_16: 2853 /* 2854 * 16-byte CDB - may contain extended commands. 2855 * 2856 * If that is the case, copy the upper byte register values. 2857 */ 2858 if (cdb[1] & 0x01) { 2859 tf->hob_feature = cdb[3]; 2860 tf->hob_nsect = cdb[5]; 2861 tf->hob_lbal = cdb[7]; 2862 tf->hob_lbam = cdb[9]; 2863 tf->hob_lbah = cdb[11]; 2864 tf->flags |= ATA_TFLAG_LBA48; 2865 } else 2866 tf->flags &= ~ATA_TFLAG_LBA48; 2867 2868 /* 2869 * Always copy low byte, device and command registers. 2870 */ 2871 tf->feature = cdb[4]; 2872 tf->nsect = cdb[6]; 2873 tf->lbal = cdb[8]; 2874 tf->lbam = cdb[10]; 2875 tf->lbah = cdb[12]; 2876 tf->device = cdb[13]; 2877 tf->command = cdb[14]; 2878 break; 2879 case ATA_12: 2880 /* 2881 * 12-byte CDB - incapable of extended commands. 2882 */ 2883 tf->flags &= ~ATA_TFLAG_LBA48; 2884 2885 tf->feature = cdb[3]; 2886 tf->nsect = cdb[4]; 2887 tf->lbal = cdb[5]; 2888 tf->lbam = cdb[6]; 2889 tf->lbah = cdb[7]; 2890 tf->device = cdb[8]; 2891 tf->command = cdb[9]; 2892 break; 2893 default: 2894 /* 2895 * 32-byte CDB - may contain extended command fields. 2896 * 2897 * If that is the case, copy the upper byte register values. 2898 */ 2899 if (cdb[10] & 0x01) { 2900 tf->hob_feature = cdb[20]; 2901 tf->hob_nsect = cdb[22]; 2902 tf->hob_lbal = cdb[16]; 2903 tf->hob_lbam = cdb[15]; 2904 tf->hob_lbah = cdb[14]; 2905 tf->flags |= ATA_TFLAG_LBA48; 2906 } else 2907 tf->flags &= ~ATA_TFLAG_LBA48; 2908 2909 tf->feature = cdb[21]; 2910 tf->nsect = cdb[23]; 2911 tf->lbal = cdb[19]; 2912 tf->lbam = cdb[18]; 2913 tf->lbah = cdb[17]; 2914 tf->device = cdb[24]; 2915 tf->command = cdb[25]; 2916 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2917 break; 2918 } 2919 2920 /* For NCQ commands copy the tag value */ 2921 if (ata_is_ncq(tf->protocol)) 2922 tf->nsect = qc->hw_tag << 3; 2923 2924 /* enforce correct master/slave bit */ 2925 tf->device = dev->devno ? 2926 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2927 2928 switch (tf->command) { 2929 /* READ/WRITE LONG use a non-standard sect_size */ 2930 case ATA_CMD_READ_LONG: 2931 case ATA_CMD_READ_LONG_ONCE: 2932 case ATA_CMD_WRITE_LONG: 2933 case ATA_CMD_WRITE_LONG_ONCE: 2934 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 2935 fp = 1; 2936 goto invalid_fld; 2937 } 2938 qc->sect_size = scsi_bufflen(scmd); 2939 break; 2940 2941 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2942 case ATA_CMD_CFA_WRITE_NE: 2943 case ATA_CMD_CFA_TRANS_SECT: 2944 case ATA_CMD_CFA_WRITE_MULT_NE: 2945 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2946 case ATA_CMD_READ: 2947 case ATA_CMD_READ_EXT: 2948 case ATA_CMD_READ_QUEUED: 2949 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2950 case ATA_CMD_FPDMA_READ: 2951 case ATA_CMD_READ_MULTI: 2952 case ATA_CMD_READ_MULTI_EXT: 2953 case ATA_CMD_PIO_READ: 2954 case ATA_CMD_PIO_READ_EXT: 2955 case ATA_CMD_READ_STREAM_DMA_EXT: 2956 case ATA_CMD_READ_STREAM_EXT: 2957 case ATA_CMD_VERIFY: 2958 case ATA_CMD_VERIFY_EXT: 2959 case ATA_CMD_WRITE: 2960 case ATA_CMD_WRITE_EXT: 2961 case ATA_CMD_WRITE_FUA_EXT: 2962 case ATA_CMD_WRITE_QUEUED: 2963 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2964 case ATA_CMD_FPDMA_WRITE: 2965 case ATA_CMD_WRITE_MULTI: 2966 case ATA_CMD_WRITE_MULTI_EXT: 2967 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2968 case ATA_CMD_PIO_WRITE: 2969 case ATA_CMD_PIO_WRITE_EXT: 2970 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2971 case ATA_CMD_WRITE_STREAM_EXT: 2972 qc->sect_size = scmd->device->sector_size; 2973 break; 2974 2975 /* Everything else uses 512 byte "sectors" */ 2976 default: 2977 qc->sect_size = ATA_SECT_SIZE; 2978 } 2979 2980 /* 2981 * Set flags so that all registers will be written, pass on 2982 * write indication (used for PIO/DMA setup), result TF is 2983 * copied back and we don't whine too much about its failure. 2984 */ 2985 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2986 if (scmd->sc_data_direction == DMA_TO_DEVICE) 2987 tf->flags |= ATA_TFLAG_WRITE; 2988 2989 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 2990 2991 /* 2992 * Set transfer length. 2993 * 2994 * TODO: find out if we need to do more here to 2995 * cover scatter/gather case. 2996 */ 2997 ata_qc_set_pc_nbytes(qc); 2998 2999 /* We may not issue DMA commands if no DMA mode is set */ 3000 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3001 fp = 1; 3002 goto invalid_fld; 3003 } 3004 3005 /* We may not issue NCQ commands to devices not supporting NCQ */ 3006 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3007 fp = 1; 3008 goto invalid_fld; 3009 } 3010 3011 /* sanity check for pio multi commands */ 3012 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3013 fp = 1; 3014 goto invalid_fld; 3015 } 3016 3017 if (is_multi_taskfile(tf)) { 3018 unsigned int multi_count = 1 << (cdb[1] >> 5); 3019 3020 /* compare the passed through multi_count 3021 * with the cached multi_count of libata 3022 */ 3023 if (multi_count != dev->multi_count) 3024 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3025 multi_count); 3026 } 3027 3028 /* 3029 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3030 * SET_FEATURES - XFER MODE must be preceded/succeeded 3031 * by an update to hardware-specific registers for each 3032 * controller (i.e. the reason for ->set_piomode(), 3033 * ->set_dmamode(), and ->post_set_mode() hooks). 3034 */ 3035 if (tf->command == ATA_CMD_SET_FEATURES && 3036 tf->feature == SETFEATURES_XFER) { 3037 fp = (cdb[0] == ATA_16) ? 4 : 3; 3038 goto invalid_fld; 3039 } 3040 3041 /* 3042 * Filter TPM commands by default. These provide an 3043 * essentially uncontrolled encrypted "back door" between 3044 * applications and the disk. Set libata.allow_tpm=1 if you 3045 * have a real reason for wanting to use them. This ensures 3046 * that installed software cannot easily mess stuff up without 3047 * user intent. DVR type users will probably ship with this enabled 3048 * for movie content management. 3049 * 3050 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3051 * for this and should do in future but that it is not sufficient as 3052 * DCS is an optional feature set. Thus we also do the software filter 3053 * so that we comply with the TC consortium stated goal that the user 3054 * can turn off TC features of their system. 3055 */ 3056 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3057 fp = (cdb[0] == ATA_16) ? 14 : 9; 3058 goto invalid_fld; 3059 } 3060 3061 return 0; 3062 3063 invalid_fld: 3064 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3065 return 1; 3066 } 3067 3068 /** 3069 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3070 * @cmd: SCSI command being translated 3071 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3072 * @sector: Starting sector 3073 * @count: Total Range of request in logical sectors 3074 * 3075 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3076 * descriptor. 3077 * 3078 * Upto 64 entries of the format: 3079 * 63:48 Range Length 3080 * 47:0 LBA 3081 * 3082 * Range Length of 0 is ignored. 3083 * LBA's should be sorted order and not overlap. 3084 * 3085 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3086 * 3087 * Return: Number of bytes copied into sglist. 3088 */ 3089 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3090 u64 sector, u32 count) 3091 { 3092 struct scsi_device *sdp = cmd->device; 3093 size_t len = sdp->sector_size; 3094 size_t r; 3095 __le64 *buf; 3096 u32 i = 0; 3097 unsigned long flags; 3098 3099 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3100 3101 if (len > ATA_SCSI_RBUF_SIZE) 3102 len = ATA_SCSI_RBUF_SIZE; 3103 3104 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3105 buf = ((void *)ata_scsi_rbuf); 3106 memset(buf, 0, len); 3107 while (i < trmax) { 3108 u64 entry = sector | 3109 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3110 buf[i++] = __cpu_to_le64(entry); 3111 if (count <= 0xffff) 3112 break; 3113 count -= 0xffff; 3114 sector += 0xffff; 3115 } 3116 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3117 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3118 3119 return r; 3120 } 3121 3122 /** 3123 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3124 * @qc: Command to be translated 3125 * 3126 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3127 * an SCT Write Same command. 3128 * Based on WRITE SAME has the UNMAP flag: 3129 * 3130 * - When set translate to DSM TRIM 3131 * - When clear translate to SCT Write Same 3132 */ 3133 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3134 { 3135 struct ata_taskfile *tf = &qc->tf; 3136 struct scsi_cmnd *scmd = qc->scsicmd; 3137 struct scsi_device *sdp = scmd->device; 3138 size_t len = sdp->sector_size; 3139 struct ata_device *dev = qc->dev; 3140 const u8 *cdb = scmd->cmnd; 3141 u64 block; 3142 u32 n_block; 3143 const u32 trmax = len >> 3; 3144 u32 size; 3145 u16 fp; 3146 u8 bp = 0xff; 3147 u8 unmap = cdb[1] & 0x8; 3148 3149 /* we may not issue DMA commands if no DMA mode is set */ 3150 if (unlikely(!ata_dma_enabled(dev))) 3151 goto invalid_opcode; 3152 3153 /* 3154 * We only allow sending this command through the block layer, 3155 * as it modifies the DATA OUT buffer, which would corrupt user 3156 * memory for SG_IO commands. 3157 */ 3158 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3159 goto invalid_opcode; 3160 3161 if (unlikely(scmd->cmd_len < 16)) { 3162 fp = 15; 3163 goto invalid_fld; 3164 } 3165 scsi_16_lba_len(cdb, &block, &n_block); 3166 3167 if (!unmap || 3168 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3169 !ata_id_has_trim(dev->id)) { 3170 fp = 1; 3171 bp = 3; 3172 goto invalid_fld; 3173 } 3174 /* If the request is too large the cmd is invalid */ 3175 if (n_block > 0xffff * trmax) { 3176 fp = 2; 3177 goto invalid_fld; 3178 } 3179 3180 /* 3181 * WRITE SAME always has a sector sized buffer as payload, this 3182 * should never be a multiple entry S/G list. 3183 */ 3184 if (!scsi_sg_count(scmd)) 3185 goto invalid_param_len; 3186 3187 /* 3188 * size must match sector size in bytes 3189 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3190 * is defined as number of 512 byte blocks to be transferred. 3191 */ 3192 3193 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3194 if (size != len) 3195 goto invalid_param_len; 3196 3197 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3198 /* Newer devices support queued TRIM commands */ 3199 tf->protocol = ATA_PROT_NCQ; 3200 tf->command = ATA_CMD_FPDMA_SEND; 3201 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3202 tf->nsect = qc->hw_tag << 3; 3203 tf->hob_feature = (size / 512) >> 8; 3204 tf->feature = size / 512; 3205 3206 tf->auxiliary = 1; 3207 } else { 3208 tf->protocol = ATA_PROT_DMA; 3209 tf->hob_feature = 0; 3210 tf->feature = ATA_DSM_TRIM; 3211 tf->hob_nsect = (size / 512) >> 8; 3212 tf->nsect = size / 512; 3213 tf->command = ATA_CMD_DSM; 3214 } 3215 3216 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3217 ATA_TFLAG_WRITE; 3218 3219 ata_qc_set_pc_nbytes(qc); 3220 3221 return 0; 3222 3223 invalid_fld: 3224 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3225 return 1; 3226 invalid_param_len: 3227 /* "Parameter list length error" */ 3228 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3229 return 1; 3230 invalid_opcode: 3231 /* "Invalid command operation code" */ 3232 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3233 return 1; 3234 } 3235 3236 /** 3237 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3238 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3239 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3240 * 3241 * Yields a subset to satisfy scsi_report_opcode() 3242 * 3243 * LOCKING: 3244 * spin_lock_irqsave(host lock) 3245 */ 3246 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3247 { 3248 struct ata_device *dev = args->dev; 3249 u8 *cdb = args->cmd->cmnd; 3250 u8 supported = 0; 3251 unsigned int err = 0; 3252 3253 if (cdb[2] != 1) { 3254 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3255 err = 2; 3256 goto out; 3257 } 3258 switch (cdb[3]) { 3259 case INQUIRY: 3260 case MODE_SENSE: 3261 case MODE_SENSE_10: 3262 case READ_CAPACITY: 3263 case SERVICE_ACTION_IN_16: 3264 case REPORT_LUNS: 3265 case REQUEST_SENSE: 3266 case SYNCHRONIZE_CACHE: 3267 case SYNCHRONIZE_CACHE_16: 3268 case REZERO_UNIT: 3269 case SEEK_6: 3270 case SEEK_10: 3271 case TEST_UNIT_READY: 3272 case SEND_DIAGNOSTIC: 3273 case MAINTENANCE_IN: 3274 case READ_6: 3275 case READ_10: 3276 case READ_16: 3277 case WRITE_6: 3278 case WRITE_10: 3279 case WRITE_16: 3280 case ATA_12: 3281 case ATA_16: 3282 case VERIFY: 3283 case VERIFY_16: 3284 case MODE_SELECT: 3285 case MODE_SELECT_10: 3286 case START_STOP: 3287 supported = 3; 3288 break; 3289 case ZBC_IN: 3290 case ZBC_OUT: 3291 if (ata_id_zoned_cap(dev->id) || 3292 dev->class == ATA_DEV_ZAC) 3293 supported = 3; 3294 break; 3295 case SECURITY_PROTOCOL_IN: 3296 case SECURITY_PROTOCOL_OUT: 3297 if (dev->flags & ATA_DFLAG_TRUSTED) 3298 supported = 3; 3299 break; 3300 default: 3301 break; 3302 } 3303 out: 3304 rbuf[1] = supported; /* supported */ 3305 return err; 3306 } 3307 3308 /** 3309 * ata_scsi_report_zones_complete - convert ATA output 3310 * @qc: command structure returning the data 3311 * 3312 * Convert T-13 little-endian field representation into 3313 * T-10 big-endian field representation. 3314 * What a mess. 3315 */ 3316 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3317 { 3318 struct scsi_cmnd *scmd = qc->scsicmd; 3319 struct sg_mapping_iter miter; 3320 unsigned long flags; 3321 unsigned int bytes = 0; 3322 3323 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3324 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3325 3326 local_irq_save(flags); 3327 while (sg_miter_next(&miter)) { 3328 unsigned int offset = 0; 3329 3330 if (bytes == 0) { 3331 char *hdr; 3332 u32 list_length; 3333 u64 max_lba, opt_lba; 3334 u16 same; 3335 3336 /* Swizzle header */ 3337 hdr = miter.addr; 3338 list_length = get_unaligned_le32(&hdr[0]); 3339 same = get_unaligned_le16(&hdr[4]); 3340 max_lba = get_unaligned_le64(&hdr[8]); 3341 opt_lba = get_unaligned_le64(&hdr[16]); 3342 put_unaligned_be32(list_length, &hdr[0]); 3343 hdr[4] = same & 0xf; 3344 put_unaligned_be64(max_lba, &hdr[8]); 3345 put_unaligned_be64(opt_lba, &hdr[16]); 3346 offset += 64; 3347 bytes += 64; 3348 } 3349 while (offset < miter.length) { 3350 char *rec; 3351 u8 cond, type, non_seq, reset; 3352 u64 size, start, wp; 3353 3354 /* Swizzle zone descriptor */ 3355 rec = miter.addr + offset; 3356 type = rec[0] & 0xf; 3357 cond = (rec[1] >> 4) & 0xf; 3358 non_seq = (rec[1] & 2); 3359 reset = (rec[1] & 1); 3360 size = get_unaligned_le64(&rec[8]); 3361 start = get_unaligned_le64(&rec[16]); 3362 wp = get_unaligned_le64(&rec[24]); 3363 rec[0] = type; 3364 rec[1] = (cond << 4) | non_seq | reset; 3365 put_unaligned_be64(size, &rec[8]); 3366 put_unaligned_be64(start, &rec[16]); 3367 put_unaligned_be64(wp, &rec[24]); 3368 WARN_ON(offset + 64 > miter.length); 3369 offset += 64; 3370 bytes += 64; 3371 } 3372 } 3373 sg_miter_stop(&miter); 3374 local_irq_restore(flags); 3375 3376 ata_scsi_qc_complete(qc); 3377 } 3378 3379 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3380 { 3381 struct ata_taskfile *tf = &qc->tf; 3382 struct scsi_cmnd *scmd = qc->scsicmd; 3383 const u8 *cdb = scmd->cmnd; 3384 u16 sect, fp = (u16)-1; 3385 u8 sa, options, bp = 0xff; 3386 u64 block; 3387 u32 n_block; 3388 3389 if (unlikely(scmd->cmd_len < 16)) { 3390 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3391 scmd->cmd_len); 3392 fp = 15; 3393 goto invalid_fld; 3394 } 3395 scsi_16_lba_len(cdb, &block, &n_block); 3396 if (n_block != scsi_bufflen(scmd)) { 3397 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3398 n_block, scsi_bufflen(scmd)); 3399 goto invalid_param_len; 3400 } 3401 sa = cdb[1] & 0x1f; 3402 if (sa != ZI_REPORT_ZONES) { 3403 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3404 fp = 1; 3405 goto invalid_fld; 3406 } 3407 /* 3408 * ZAC allows only for transfers in 512 byte blocks, 3409 * and uses a 16 bit value for the transfer count. 3410 */ 3411 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3412 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3413 goto invalid_param_len; 3414 } 3415 sect = n_block / 512; 3416 options = cdb[14] & 0xbf; 3417 3418 if (ata_ncq_enabled(qc->dev) && 3419 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3420 tf->protocol = ATA_PROT_NCQ; 3421 tf->command = ATA_CMD_FPDMA_RECV; 3422 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3423 tf->nsect = qc->hw_tag << 3; 3424 tf->feature = sect & 0xff; 3425 tf->hob_feature = (sect >> 8) & 0xff; 3426 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3427 } else { 3428 tf->command = ATA_CMD_ZAC_MGMT_IN; 3429 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3430 tf->protocol = ATA_PROT_DMA; 3431 tf->hob_feature = options; 3432 tf->hob_nsect = (sect >> 8) & 0xff; 3433 tf->nsect = sect & 0xff; 3434 } 3435 tf->device = ATA_LBA; 3436 tf->lbah = (block >> 16) & 0xff; 3437 tf->lbam = (block >> 8) & 0xff; 3438 tf->lbal = block & 0xff; 3439 tf->hob_lbah = (block >> 40) & 0xff; 3440 tf->hob_lbam = (block >> 32) & 0xff; 3441 tf->hob_lbal = (block >> 24) & 0xff; 3442 3443 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3444 qc->flags |= ATA_QCFLAG_RESULT_TF; 3445 3446 ata_qc_set_pc_nbytes(qc); 3447 3448 qc->complete_fn = ata_scsi_report_zones_complete; 3449 3450 return 0; 3451 3452 invalid_fld: 3453 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3454 return 1; 3455 3456 invalid_param_len: 3457 /* "Parameter list length error" */ 3458 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3459 return 1; 3460 } 3461 3462 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3463 { 3464 struct ata_taskfile *tf = &qc->tf; 3465 struct scsi_cmnd *scmd = qc->scsicmd; 3466 struct ata_device *dev = qc->dev; 3467 const u8 *cdb = scmd->cmnd; 3468 u8 all, sa; 3469 u64 block; 3470 u32 n_block; 3471 u16 fp = (u16)-1; 3472 3473 if (unlikely(scmd->cmd_len < 16)) { 3474 fp = 15; 3475 goto invalid_fld; 3476 } 3477 3478 sa = cdb[1] & 0x1f; 3479 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3480 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3481 fp = 1; 3482 goto invalid_fld; 3483 } 3484 3485 scsi_16_lba_len(cdb, &block, &n_block); 3486 if (n_block) { 3487 /* 3488 * ZAC MANAGEMENT OUT doesn't define any length 3489 */ 3490 goto invalid_param_len; 3491 } 3492 3493 all = cdb[14] & 0x1; 3494 if (all) { 3495 /* 3496 * Ignore the block address (zone ID) as defined by ZBC. 3497 */ 3498 block = 0; 3499 } else if (block >= dev->n_sectors) { 3500 /* 3501 * Block must be a valid zone ID (a zone start LBA). 3502 */ 3503 fp = 2; 3504 goto invalid_fld; 3505 } 3506 3507 if (ata_ncq_enabled(qc->dev) && 3508 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3509 tf->protocol = ATA_PROT_NCQ_NODATA; 3510 tf->command = ATA_CMD_NCQ_NON_DATA; 3511 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3512 tf->nsect = qc->hw_tag << 3; 3513 tf->auxiliary = sa | ((u16)all << 8); 3514 } else { 3515 tf->protocol = ATA_PROT_NODATA; 3516 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3517 tf->feature = sa; 3518 tf->hob_feature = all; 3519 } 3520 tf->lbah = (block >> 16) & 0xff; 3521 tf->lbam = (block >> 8) & 0xff; 3522 tf->lbal = block & 0xff; 3523 tf->hob_lbah = (block >> 40) & 0xff; 3524 tf->hob_lbam = (block >> 32) & 0xff; 3525 tf->hob_lbal = (block >> 24) & 0xff; 3526 tf->device = ATA_LBA; 3527 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3528 3529 return 0; 3530 3531 invalid_fld: 3532 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3533 return 1; 3534 invalid_param_len: 3535 /* "Parameter list length error" */ 3536 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3537 return 1; 3538 } 3539 3540 /** 3541 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3542 * @qc: Storage for translated ATA taskfile 3543 * @buf: input buffer 3544 * @len: number of valid bytes in the input buffer 3545 * @fp: out parameter for the failed field on error 3546 * 3547 * Prepare a taskfile to modify caching information for the device. 3548 * 3549 * LOCKING: 3550 * None. 3551 */ 3552 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3553 const u8 *buf, int len, u16 *fp) 3554 { 3555 struct ata_taskfile *tf = &qc->tf; 3556 struct ata_device *dev = qc->dev; 3557 u8 mpage[CACHE_MPAGE_LEN]; 3558 u8 wce; 3559 int i; 3560 3561 /* 3562 * The first two bytes of def_cache_mpage are a header, so offsets 3563 * in mpage are off by 2 compared to buf. Same for len. 3564 */ 3565 3566 if (len != CACHE_MPAGE_LEN - 2) { 3567 *fp = min(len, CACHE_MPAGE_LEN - 2); 3568 return -EINVAL; 3569 } 3570 3571 wce = buf[0] & (1 << 2); 3572 3573 /* 3574 * Check that read-only bits are not modified. 3575 */ 3576 ata_msense_caching(dev->id, mpage, false); 3577 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3578 if (i == 0) 3579 continue; 3580 if (mpage[i + 2] != buf[i]) { 3581 *fp = i; 3582 return -EINVAL; 3583 } 3584 } 3585 3586 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3587 tf->protocol = ATA_PROT_NODATA; 3588 tf->nsect = 0; 3589 tf->command = ATA_CMD_SET_FEATURES; 3590 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3591 return 0; 3592 } 3593 3594 /** 3595 * ata_mselect_control - Simulate MODE SELECT for control page 3596 * @qc: Storage for translated ATA taskfile 3597 * @buf: input buffer 3598 * @len: number of valid bytes in the input buffer 3599 * @fp: out parameter for the failed field on error 3600 * 3601 * Prepare a taskfile to modify caching information for the device. 3602 * 3603 * LOCKING: 3604 * None. 3605 */ 3606 static int ata_mselect_control(struct ata_queued_cmd *qc, 3607 const u8 *buf, int len, u16 *fp) 3608 { 3609 struct ata_device *dev = qc->dev; 3610 u8 mpage[CONTROL_MPAGE_LEN]; 3611 u8 d_sense; 3612 int i; 3613 3614 /* 3615 * The first two bytes of def_control_mpage are a header, so offsets 3616 * in mpage are off by 2 compared to buf. Same for len. 3617 */ 3618 3619 if (len != CONTROL_MPAGE_LEN - 2) { 3620 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3621 return -EINVAL; 3622 } 3623 3624 d_sense = buf[0] & (1 << 2); 3625 3626 /* 3627 * Check that read-only bits are not modified. 3628 */ 3629 ata_msense_control(dev, mpage, false); 3630 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3631 if (i == 0) 3632 continue; 3633 if (mpage[2 + i] != buf[i]) { 3634 *fp = i; 3635 return -EINVAL; 3636 } 3637 } 3638 if (d_sense & (1 << 2)) 3639 dev->flags |= ATA_DFLAG_D_SENSE; 3640 else 3641 dev->flags &= ~ATA_DFLAG_D_SENSE; 3642 return 0; 3643 } 3644 3645 /** 3646 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3647 * @qc: Storage for translated ATA taskfile 3648 * 3649 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3650 * Assume this is invoked for direct access devices (e.g. disks) only. 3651 * There should be no block descriptor for other device types. 3652 * 3653 * LOCKING: 3654 * spin_lock_irqsave(host lock) 3655 */ 3656 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3657 { 3658 struct scsi_cmnd *scmd = qc->scsicmd; 3659 const u8 *cdb = scmd->cmnd; 3660 u8 pg, spg; 3661 unsigned six_byte, pg_len, hdr_len, bd_len; 3662 int len; 3663 u16 fp = (u16)-1; 3664 u8 bp = 0xff; 3665 u8 buffer[64]; 3666 const u8 *p = buffer; 3667 3668 six_byte = (cdb[0] == MODE_SELECT); 3669 if (six_byte) { 3670 if (scmd->cmd_len < 5) { 3671 fp = 4; 3672 goto invalid_fld; 3673 } 3674 3675 len = cdb[4]; 3676 hdr_len = 4; 3677 } else { 3678 if (scmd->cmd_len < 9) { 3679 fp = 8; 3680 goto invalid_fld; 3681 } 3682 3683 len = get_unaligned_be16(&cdb[7]); 3684 hdr_len = 8; 3685 } 3686 3687 /* We only support PF=1, SP=0. */ 3688 if ((cdb[1] & 0x11) != 0x10) { 3689 fp = 1; 3690 bp = (cdb[1] & 0x01) ? 1 : 5; 3691 goto invalid_fld; 3692 } 3693 3694 /* Test early for possible overrun. */ 3695 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3696 goto invalid_param_len; 3697 3698 /* Move past header and block descriptors. */ 3699 if (len < hdr_len) 3700 goto invalid_param_len; 3701 3702 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3703 buffer, sizeof(buffer))) 3704 goto invalid_param_len; 3705 3706 if (six_byte) 3707 bd_len = p[3]; 3708 else 3709 bd_len = get_unaligned_be16(&p[6]); 3710 3711 len -= hdr_len; 3712 p += hdr_len; 3713 if (len < bd_len) 3714 goto invalid_param_len; 3715 if (bd_len != 0 && bd_len != 8) { 3716 fp = (six_byte) ? 3 : 6; 3717 fp += bd_len + hdr_len; 3718 goto invalid_param; 3719 } 3720 3721 len -= bd_len; 3722 p += bd_len; 3723 if (len == 0) 3724 goto skip; 3725 3726 /* Parse both possible formats for the mode page headers. */ 3727 pg = p[0] & 0x3f; 3728 if (p[0] & 0x40) { 3729 if (len < 4) 3730 goto invalid_param_len; 3731 3732 spg = p[1]; 3733 pg_len = get_unaligned_be16(&p[2]); 3734 p += 4; 3735 len -= 4; 3736 } else { 3737 if (len < 2) 3738 goto invalid_param_len; 3739 3740 spg = 0; 3741 pg_len = p[1]; 3742 p += 2; 3743 len -= 2; 3744 } 3745 3746 /* 3747 * No mode subpages supported (yet) but asking for _all_ 3748 * subpages may be valid 3749 */ 3750 if (spg && (spg != ALL_SUB_MPAGES)) { 3751 fp = (p[0] & 0x40) ? 1 : 0; 3752 fp += hdr_len + bd_len; 3753 goto invalid_param; 3754 } 3755 if (pg_len > len) 3756 goto invalid_param_len; 3757 3758 switch (pg) { 3759 case CACHE_MPAGE: 3760 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3761 fp += hdr_len + bd_len; 3762 goto invalid_param; 3763 } 3764 break; 3765 case CONTROL_MPAGE: 3766 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 3767 fp += hdr_len + bd_len; 3768 goto invalid_param; 3769 } else { 3770 goto skip; /* No ATA command to send */ 3771 } 3772 break; 3773 default: /* invalid page code */ 3774 fp = bd_len + hdr_len; 3775 goto invalid_param; 3776 } 3777 3778 /* 3779 * Only one page has changeable data, so we only support setting one 3780 * page at a time. 3781 */ 3782 if (len > pg_len) 3783 goto invalid_param; 3784 3785 return 0; 3786 3787 invalid_fld: 3788 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3789 return 1; 3790 3791 invalid_param: 3792 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3793 return 1; 3794 3795 invalid_param_len: 3796 /* "Parameter list length error" */ 3797 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3798 return 1; 3799 3800 skip: 3801 scmd->result = SAM_STAT_GOOD; 3802 return 1; 3803 } 3804 3805 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3806 { 3807 if (len == 0) 3808 return ATA_CMD_TRUSTED_NONDATA; 3809 else if (send) 3810 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 3811 else 3812 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 3813 } 3814 3815 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 3816 { 3817 struct scsi_cmnd *scmd = qc->scsicmd; 3818 const u8 *cdb = scmd->cmnd; 3819 struct ata_taskfile *tf = &qc->tf; 3820 u8 secp = cdb[1]; 3821 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 3822 u16 spsp = get_unaligned_be16(&cdb[2]); 3823 u32 len = get_unaligned_be32(&cdb[6]); 3824 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 3825 3826 /* 3827 * We don't support the ATA "security" protocol. 3828 */ 3829 if (secp == 0xef) { 3830 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 3831 return 1; 3832 } 3833 3834 if (cdb[4] & 7) { /* INC_512 */ 3835 if (len > 0xffff) { 3836 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3837 return 1; 3838 } 3839 } else { 3840 if (len > 0x01fffe00) { 3841 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3842 return 1; 3843 } 3844 3845 /* convert to the sector-based ATA addressing */ 3846 len = (len + 511) / 512; 3847 } 3848 3849 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 3850 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 3851 if (send) 3852 tf->flags |= ATA_TFLAG_WRITE; 3853 tf->command = ata_scsi_trusted_op(len, send, dma); 3854 tf->feature = secp; 3855 tf->lbam = spsp & 0xff; 3856 tf->lbah = spsp >> 8; 3857 3858 if (len) { 3859 tf->nsect = len & 0xff; 3860 tf->lbal = len >> 8; 3861 } else { 3862 if (!send) 3863 tf->lbah = (1 << 7); 3864 } 3865 3866 ata_qc_set_pc_nbytes(qc); 3867 return 0; 3868 } 3869 3870 /** 3871 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 3872 * @qc: Command to be translated 3873 * 3874 * Translate a SCSI variable length CDB to specified commands. 3875 * It checks a service action value in CDB to call corresponding handler. 3876 * 3877 * RETURNS: 3878 * Zero on success, non-zero on failure 3879 * 3880 */ 3881 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 3882 { 3883 struct scsi_cmnd *scmd = qc->scsicmd; 3884 const u8 *cdb = scmd->cmnd; 3885 const u16 sa = get_unaligned_be16(&cdb[8]); 3886 3887 /* 3888 * if service action represents a ata pass-thru(32) command, 3889 * then pass it to ata_scsi_pass_thru handler. 3890 */ 3891 if (sa == ATA_32) 3892 return ata_scsi_pass_thru(qc); 3893 3894 /* unsupported service action */ 3895 return 1; 3896 } 3897 3898 /** 3899 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3900 * @dev: ATA device 3901 * @cmd: SCSI command opcode to consider 3902 * 3903 * Look up the SCSI command given, and determine whether the 3904 * SCSI command is to be translated or simulated. 3905 * 3906 * RETURNS: 3907 * Pointer to translation function if possible, %NULL if not. 3908 */ 3909 3910 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3911 { 3912 switch (cmd) { 3913 case READ_6: 3914 case READ_10: 3915 case READ_16: 3916 3917 case WRITE_6: 3918 case WRITE_10: 3919 case WRITE_16: 3920 return ata_scsi_rw_xlat; 3921 3922 case WRITE_SAME_16: 3923 return ata_scsi_write_same_xlat; 3924 3925 case SYNCHRONIZE_CACHE: 3926 case SYNCHRONIZE_CACHE_16: 3927 if (ata_try_flush_cache(dev)) 3928 return ata_scsi_flush_xlat; 3929 break; 3930 3931 case VERIFY: 3932 case VERIFY_16: 3933 return ata_scsi_verify_xlat; 3934 3935 case ATA_12: 3936 case ATA_16: 3937 return ata_scsi_pass_thru; 3938 3939 case VARIABLE_LENGTH_CMD: 3940 return ata_scsi_var_len_cdb_xlat; 3941 3942 case MODE_SELECT: 3943 case MODE_SELECT_10: 3944 return ata_scsi_mode_select_xlat; 3945 3946 case ZBC_IN: 3947 return ata_scsi_zbc_in_xlat; 3948 3949 case ZBC_OUT: 3950 return ata_scsi_zbc_out_xlat; 3951 3952 case SECURITY_PROTOCOL_IN: 3953 case SECURITY_PROTOCOL_OUT: 3954 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 3955 break; 3956 return ata_scsi_security_inout_xlat; 3957 3958 case START_STOP: 3959 return ata_scsi_start_stop_xlat; 3960 } 3961 3962 return NULL; 3963 } 3964 3965 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 3966 { 3967 struct ata_port *ap = dev->link->ap; 3968 u8 scsi_op = scmd->cmnd[0]; 3969 ata_xlat_func_t xlat_func; 3970 3971 /* 3972 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 3973 * However, this check is done without holding the ap->lock (a libata 3974 * specific lock), so we can have received an error irq since then, 3975 * therefore we must check if EH is pending, while holding ap->lock. 3976 */ 3977 if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) 3978 return SCSI_MLQUEUE_DEVICE_BUSY; 3979 3980 if (unlikely(!scmd->cmd_len)) 3981 goto bad_cdb_len; 3982 3983 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 3984 if (unlikely(scmd->cmd_len > dev->cdb_len)) 3985 goto bad_cdb_len; 3986 3987 xlat_func = ata_get_xlat_func(dev, scsi_op); 3988 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3989 /* relay SCSI command to ATAPI device */ 3990 int len = COMMAND_SIZE(scsi_op); 3991 3992 if (unlikely(len > scmd->cmd_len || 3993 len > dev->cdb_len || 3994 scmd->cmd_len > ATAPI_CDB_LEN)) 3995 goto bad_cdb_len; 3996 3997 xlat_func = atapi_xlat; 3998 } else { 3999 /* ATA_16 passthru, treat as an ATA command */ 4000 if (unlikely(scmd->cmd_len > 16)) 4001 goto bad_cdb_len; 4002 4003 xlat_func = ata_get_xlat_func(dev, scsi_op); 4004 } 4005 4006 if (xlat_func) 4007 return ata_scsi_translate(dev, scmd, xlat_func); 4008 4009 ata_scsi_simulate(dev, scmd); 4010 4011 return 0; 4012 4013 bad_cdb_len: 4014 scmd->result = DID_ERROR << 16; 4015 scsi_done(scmd); 4016 return 0; 4017 } 4018 4019 /** 4020 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4021 * @shost: SCSI host of command to be sent 4022 * @cmd: SCSI command to be sent 4023 * 4024 * In some cases, this function translates SCSI commands into 4025 * ATA taskfiles, and queues the taskfiles to be sent to 4026 * hardware. In other cases, this function simulates a 4027 * SCSI device by evaluating and responding to certain 4028 * SCSI commands. This creates the overall effect of 4029 * ATA and ATAPI devices appearing as SCSI devices. 4030 * 4031 * LOCKING: 4032 * ATA host lock 4033 * 4034 * RETURNS: 4035 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4036 * 0 otherwise. 4037 */ 4038 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4039 { 4040 struct ata_port *ap; 4041 struct ata_device *dev; 4042 struct scsi_device *scsidev = cmd->device; 4043 int rc = 0; 4044 unsigned long irq_flags; 4045 4046 ap = ata_shost_to_port(shost); 4047 4048 spin_lock_irqsave(ap->lock, irq_flags); 4049 4050 dev = ata_scsi_find_dev(ap, scsidev); 4051 if (likely(dev)) 4052 rc = __ata_scsi_queuecmd(cmd, dev); 4053 else { 4054 cmd->result = (DID_BAD_TARGET << 16); 4055 scsi_done(cmd); 4056 } 4057 4058 spin_unlock_irqrestore(ap->lock, irq_flags); 4059 4060 return rc; 4061 } 4062 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4063 4064 /** 4065 * ata_scsi_simulate - simulate SCSI command on ATA device 4066 * @dev: the target device 4067 * @cmd: SCSI command being sent to device. 4068 * 4069 * Interprets and directly executes a select list of SCSI commands 4070 * that can be handled internally. 4071 * 4072 * LOCKING: 4073 * spin_lock_irqsave(host lock) 4074 */ 4075 4076 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4077 { 4078 struct ata_scsi_args args; 4079 const u8 *scsicmd = cmd->cmnd; 4080 u8 tmp8; 4081 4082 args.dev = dev; 4083 args.id = dev->id; 4084 args.cmd = cmd; 4085 4086 switch(scsicmd[0]) { 4087 case INQUIRY: 4088 if (scsicmd[1] & 2) /* is CmdDt set? */ 4089 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4090 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4091 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4092 else switch (scsicmd[2]) { 4093 case 0x00: 4094 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4095 break; 4096 case 0x80: 4097 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4098 break; 4099 case 0x83: 4100 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4101 break; 4102 case 0x89: 4103 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4104 break; 4105 case 0xb0: 4106 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4107 break; 4108 case 0xb1: 4109 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4110 break; 4111 case 0xb2: 4112 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4113 break; 4114 case 0xb6: 4115 if (dev->flags & ATA_DFLAG_ZAC) 4116 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4117 else 4118 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4119 break; 4120 case 0xb9: 4121 if (dev->cpr_log) 4122 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4123 else 4124 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4125 break; 4126 default: 4127 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4128 break; 4129 } 4130 break; 4131 4132 case MODE_SENSE: 4133 case MODE_SENSE_10: 4134 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4135 break; 4136 4137 case READ_CAPACITY: 4138 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4139 break; 4140 4141 case SERVICE_ACTION_IN_16: 4142 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4143 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4144 else 4145 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4146 break; 4147 4148 case REPORT_LUNS: 4149 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4150 break; 4151 4152 case REQUEST_SENSE: 4153 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4154 break; 4155 4156 /* if we reach this, then writeback caching is disabled, 4157 * turning this into a no-op. 4158 */ 4159 case SYNCHRONIZE_CACHE: 4160 case SYNCHRONIZE_CACHE_16: 4161 fallthrough; 4162 4163 /* no-op's, complete with success */ 4164 case REZERO_UNIT: 4165 case SEEK_6: 4166 case SEEK_10: 4167 case TEST_UNIT_READY: 4168 break; 4169 4170 case SEND_DIAGNOSTIC: 4171 tmp8 = scsicmd[1] & ~(1 << 3); 4172 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4173 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4174 break; 4175 4176 case MAINTENANCE_IN: 4177 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4178 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4179 else 4180 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4181 break; 4182 4183 /* all other commands */ 4184 default: 4185 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4186 /* "Invalid command operation code" */ 4187 break; 4188 } 4189 4190 scsi_done(cmd); 4191 } 4192 4193 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4194 { 4195 int i, rc; 4196 4197 for (i = 0; i < host->n_ports; i++) { 4198 struct ata_port *ap = host->ports[i]; 4199 struct Scsi_Host *shost; 4200 4201 rc = -ENOMEM; 4202 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4203 if (!shost) 4204 goto err_alloc; 4205 4206 shost->eh_noresume = 1; 4207 *(struct ata_port **)&shost->hostdata[0] = ap; 4208 ap->scsi_host = shost; 4209 4210 shost->transportt = ata_scsi_transport_template; 4211 shost->unique_id = ap->print_id; 4212 shost->max_id = 16; 4213 shost->max_lun = 1; 4214 shost->max_channel = 1; 4215 shost->max_cmd_len = 32; 4216 4217 /* Schedule policy is determined by ->qc_defer() 4218 * callback and it needs to see every deferred qc. 4219 * Set host_blocked to 1 to prevent SCSI midlayer from 4220 * automatically deferring requests. 4221 */ 4222 shost->max_host_blocked = 1; 4223 4224 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4225 if (rc) 4226 goto err_alloc; 4227 } 4228 4229 return 0; 4230 4231 err_alloc: 4232 while (--i >= 0) { 4233 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4234 4235 /* scsi_host_put() is in ata_devres_release() */ 4236 scsi_remove_host(shost); 4237 } 4238 return rc; 4239 } 4240 4241 #ifdef CONFIG_OF 4242 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4243 { 4244 struct scsi_device *sdev = dev->sdev; 4245 struct device *d = ap->host->dev; 4246 struct device_node *np = d->of_node; 4247 struct device_node *child; 4248 4249 for_each_available_child_of_node(np, child) { 4250 int ret; 4251 u32 val; 4252 4253 ret = of_property_read_u32(child, "reg", &val); 4254 if (ret) 4255 continue; 4256 if (val == dev->devno) { 4257 dev_dbg(d, "found matching device node\n"); 4258 sdev->sdev_gendev.of_node = child; 4259 return; 4260 } 4261 } 4262 } 4263 #else 4264 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4265 { 4266 } 4267 #endif 4268 4269 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4270 { 4271 int tries = 5; 4272 struct ata_device *last_failed_dev = NULL; 4273 struct ata_link *link; 4274 struct ata_device *dev; 4275 4276 repeat: 4277 ata_for_each_link(link, ap, EDGE) { 4278 ata_for_each_dev(dev, link, ENABLED) { 4279 struct scsi_device *sdev; 4280 int channel = 0, id = 0; 4281 4282 if (dev->sdev) 4283 continue; 4284 4285 if (ata_is_host_link(link)) 4286 id = dev->devno; 4287 else 4288 channel = link->pmp; 4289 4290 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4291 NULL); 4292 if (!IS_ERR(sdev)) { 4293 dev->sdev = sdev; 4294 ata_scsi_assign_ofnode(dev, ap); 4295 scsi_device_put(sdev); 4296 } else { 4297 dev->sdev = NULL; 4298 } 4299 } 4300 } 4301 4302 /* If we scanned while EH was in progress or allocation 4303 * failure occurred, scan would have failed silently. Check 4304 * whether all devices are attached. 4305 */ 4306 ata_for_each_link(link, ap, EDGE) { 4307 ata_for_each_dev(dev, link, ENABLED) { 4308 if (!dev->sdev) 4309 goto exit_loop; 4310 } 4311 } 4312 exit_loop: 4313 if (!link) 4314 return; 4315 4316 /* we're missing some SCSI devices */ 4317 if (sync) { 4318 /* If caller requested synchrnous scan && we've made 4319 * any progress, sleep briefly and repeat. 4320 */ 4321 if (dev != last_failed_dev) { 4322 msleep(100); 4323 last_failed_dev = dev; 4324 goto repeat; 4325 } 4326 4327 /* We might be failing to detect boot device, give it 4328 * a few more chances. 4329 */ 4330 if (--tries) { 4331 msleep(100); 4332 goto repeat; 4333 } 4334 4335 ata_port_err(ap, 4336 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4337 } 4338 4339 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4340 round_jiffies_relative(HZ)); 4341 } 4342 4343 /** 4344 * ata_scsi_offline_dev - offline attached SCSI device 4345 * @dev: ATA device to offline attached SCSI device for 4346 * 4347 * This function is called from ata_eh_hotplug() and responsible 4348 * for taking the SCSI device attached to @dev offline. This 4349 * function is called with host lock which protects dev->sdev 4350 * against clearing. 4351 * 4352 * LOCKING: 4353 * spin_lock_irqsave(host lock) 4354 * 4355 * RETURNS: 4356 * 1 if attached SCSI device exists, 0 otherwise. 4357 */ 4358 int ata_scsi_offline_dev(struct ata_device *dev) 4359 { 4360 if (dev->sdev) { 4361 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4362 return 1; 4363 } 4364 return 0; 4365 } 4366 4367 /** 4368 * ata_scsi_remove_dev - remove attached SCSI device 4369 * @dev: ATA device to remove attached SCSI device for 4370 * 4371 * This function is called from ata_eh_scsi_hotplug() and 4372 * responsible for removing the SCSI device attached to @dev. 4373 * 4374 * LOCKING: 4375 * Kernel thread context (may sleep). 4376 */ 4377 static void ata_scsi_remove_dev(struct ata_device *dev) 4378 { 4379 struct ata_port *ap = dev->link->ap; 4380 struct scsi_device *sdev; 4381 unsigned long flags; 4382 4383 /* Alas, we need to grab scan_mutex to ensure SCSI device 4384 * state doesn't change underneath us and thus 4385 * scsi_device_get() always succeeds. The mutex locking can 4386 * be removed if there is __scsi_device_get() interface which 4387 * increments reference counts regardless of device state. 4388 */ 4389 mutex_lock(&ap->scsi_host->scan_mutex); 4390 spin_lock_irqsave(ap->lock, flags); 4391 4392 /* clearing dev->sdev is protected by host lock */ 4393 sdev = dev->sdev; 4394 dev->sdev = NULL; 4395 4396 if (sdev) { 4397 /* If user initiated unplug races with us, sdev can go 4398 * away underneath us after the host lock and 4399 * scan_mutex are released. Hold onto it. 4400 */ 4401 if (scsi_device_get(sdev) == 0) { 4402 /* The following ensures the attached sdev is 4403 * offline on return from ata_scsi_offline_dev() 4404 * regardless it wins or loses the race 4405 * against this function. 4406 */ 4407 scsi_device_set_state(sdev, SDEV_OFFLINE); 4408 } else { 4409 WARN_ON(1); 4410 sdev = NULL; 4411 } 4412 } 4413 4414 spin_unlock_irqrestore(ap->lock, flags); 4415 mutex_unlock(&ap->scsi_host->scan_mutex); 4416 4417 if (sdev) { 4418 ata_dev_info(dev, "detaching (SCSI %s)\n", 4419 dev_name(&sdev->sdev_gendev)); 4420 4421 scsi_remove_device(sdev); 4422 scsi_device_put(sdev); 4423 } 4424 } 4425 4426 static void ata_scsi_handle_link_detach(struct ata_link *link) 4427 { 4428 struct ata_port *ap = link->ap; 4429 struct ata_device *dev; 4430 4431 ata_for_each_dev(dev, link, ALL) { 4432 unsigned long flags; 4433 4434 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4435 continue; 4436 4437 spin_lock_irqsave(ap->lock, flags); 4438 dev->flags &= ~ATA_DFLAG_DETACHED; 4439 spin_unlock_irqrestore(ap->lock, flags); 4440 4441 if (zpodd_dev_enabled(dev)) 4442 zpodd_exit(dev); 4443 4444 ata_scsi_remove_dev(dev); 4445 } 4446 } 4447 4448 /** 4449 * ata_scsi_media_change_notify - send media change event 4450 * @dev: Pointer to the disk device with media change event 4451 * 4452 * Tell the block layer to send a media change notification 4453 * event. 4454 * 4455 * LOCKING: 4456 * spin_lock_irqsave(host lock) 4457 */ 4458 void ata_scsi_media_change_notify(struct ata_device *dev) 4459 { 4460 if (dev->sdev) 4461 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4462 GFP_ATOMIC); 4463 } 4464 4465 /** 4466 * ata_scsi_hotplug - SCSI part of hotplug 4467 * @work: Pointer to ATA port to perform SCSI hotplug on 4468 * 4469 * Perform SCSI part of hotplug. It's executed from a separate 4470 * workqueue after EH completes. This is necessary because SCSI 4471 * hot plugging requires working EH and hot unplugging is 4472 * synchronized with hot plugging with a mutex. 4473 * 4474 * LOCKING: 4475 * Kernel thread context (may sleep). 4476 */ 4477 void ata_scsi_hotplug(struct work_struct *work) 4478 { 4479 struct ata_port *ap = 4480 container_of(work, struct ata_port, hotplug_task.work); 4481 int i; 4482 4483 if (ap->pflags & ATA_PFLAG_UNLOADING) 4484 return; 4485 4486 mutex_lock(&ap->scsi_scan_mutex); 4487 4488 /* Unplug detached devices. We cannot use link iterator here 4489 * because PMP links have to be scanned even if PMP is 4490 * currently not attached. Iterate manually. 4491 */ 4492 ata_scsi_handle_link_detach(&ap->link); 4493 if (ap->pmp_link) 4494 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4495 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4496 4497 /* scan for new ones */ 4498 ata_scsi_scan_host(ap, 0); 4499 4500 mutex_unlock(&ap->scsi_scan_mutex); 4501 } 4502 4503 /** 4504 * ata_scsi_user_scan - indication for user-initiated bus scan 4505 * @shost: SCSI host to scan 4506 * @channel: Channel to scan 4507 * @id: ID to scan 4508 * @lun: LUN to scan 4509 * 4510 * This function is called when user explicitly requests bus 4511 * scan. Set probe pending flag and invoke EH. 4512 * 4513 * LOCKING: 4514 * SCSI layer (we don't care) 4515 * 4516 * RETURNS: 4517 * Zero. 4518 */ 4519 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4520 unsigned int id, u64 lun) 4521 { 4522 struct ata_port *ap = ata_shost_to_port(shost); 4523 unsigned long flags; 4524 int devno, rc = 0; 4525 4526 if (!ap->ops->error_handler) 4527 return -EOPNOTSUPP; 4528 4529 if (lun != SCAN_WILD_CARD && lun) 4530 return -EINVAL; 4531 4532 if (!sata_pmp_attached(ap)) { 4533 if (channel != SCAN_WILD_CARD && channel) 4534 return -EINVAL; 4535 devno = id; 4536 } else { 4537 if (id != SCAN_WILD_CARD && id) 4538 return -EINVAL; 4539 devno = channel; 4540 } 4541 4542 spin_lock_irqsave(ap->lock, flags); 4543 4544 if (devno == SCAN_WILD_CARD) { 4545 struct ata_link *link; 4546 4547 ata_for_each_link(link, ap, EDGE) { 4548 struct ata_eh_info *ehi = &link->eh_info; 4549 ehi->probe_mask |= ATA_ALL_DEVICES; 4550 ehi->action |= ATA_EH_RESET; 4551 } 4552 } else { 4553 struct ata_device *dev = ata_find_dev(ap, devno); 4554 4555 if (dev) { 4556 struct ata_eh_info *ehi = &dev->link->eh_info; 4557 ehi->probe_mask |= 1 << dev->devno; 4558 ehi->action |= ATA_EH_RESET; 4559 } else 4560 rc = -EINVAL; 4561 } 4562 4563 if (rc == 0) { 4564 ata_port_schedule_eh(ap); 4565 spin_unlock_irqrestore(ap->lock, flags); 4566 ata_port_wait_eh(ap); 4567 } else 4568 spin_unlock_irqrestore(ap->lock, flags); 4569 4570 return rc; 4571 } 4572 4573 /** 4574 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4575 * @work: Pointer to ATA port to perform scsi_rescan_device() 4576 * 4577 * After ATA pass thru (SAT) commands are executed successfully, 4578 * libata need to propagate the changes to SCSI layer. 4579 * 4580 * LOCKING: 4581 * Kernel thread context (may sleep). 4582 */ 4583 void ata_scsi_dev_rescan(struct work_struct *work) 4584 { 4585 struct ata_port *ap = 4586 container_of(work, struct ata_port, scsi_rescan_task); 4587 struct ata_link *link; 4588 struct ata_device *dev; 4589 unsigned long flags; 4590 4591 mutex_lock(&ap->scsi_scan_mutex); 4592 spin_lock_irqsave(ap->lock, flags); 4593 4594 ata_for_each_link(link, ap, EDGE) { 4595 ata_for_each_dev(dev, link, ENABLED) { 4596 struct scsi_device *sdev = dev->sdev; 4597 4598 if (!sdev) 4599 continue; 4600 if (scsi_device_get(sdev)) 4601 continue; 4602 4603 spin_unlock_irqrestore(ap->lock, flags); 4604 scsi_rescan_device(&(sdev->sdev_gendev)); 4605 scsi_device_put(sdev); 4606 spin_lock_irqsave(ap->lock, flags); 4607 } 4608 } 4609 4610 spin_unlock_irqrestore(ap->lock, flags); 4611 mutex_unlock(&ap->scsi_scan_mutex); 4612 } 4613