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