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 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; 1026 } 1027 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1028 1029 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1030 { 1031 struct request_queue *q = sdev->request_queue; 1032 1033 if (!ata_id_has_unload(dev->id)) 1034 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1035 1036 /* configure max sectors */ 1037 blk_queue_max_hw_sectors(q, dev->max_sectors); 1038 1039 if (dev->class == ATA_DEV_ATAPI) { 1040 sdev->sector_size = ATA_SECT_SIZE; 1041 1042 /* set DMA padding */ 1043 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1044 1045 /* make room for appending the drain */ 1046 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1047 1048 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1049 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1050 if (!sdev->dma_drain_buf) { 1051 ata_dev_err(dev, "drain buffer allocation failed\n"); 1052 return -ENOMEM; 1053 } 1054 } else { 1055 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1056 sdev->manage_start_stop = 1; 1057 } 1058 1059 /* 1060 * ata_pio_sectors() expects buffer for each sector to not cross 1061 * page boundary. Enforce it by requiring buffers to be sector 1062 * aligned, which works iff sector_size is not larger than 1063 * PAGE_SIZE. ATAPI devices also need the alignment as 1064 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1065 */ 1066 if (sdev->sector_size > PAGE_SIZE) 1067 ata_dev_warn(dev, 1068 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1069 sdev->sector_size); 1070 1071 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1072 1073 if (dev->flags & ATA_DFLAG_AN) 1074 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1075 1076 if (dev->flags & ATA_DFLAG_NCQ) { 1077 int depth; 1078 1079 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1080 depth = min(ATA_MAX_QUEUE, depth); 1081 scsi_change_queue_depth(sdev, depth); 1082 } 1083 1084 if (dev->flags & ATA_DFLAG_TRUSTED) 1085 sdev->security_supported = 1; 1086 1087 dev->sdev = sdev; 1088 return 0; 1089 } 1090 1091 /** 1092 * ata_scsi_slave_config - Set SCSI device attributes 1093 * @sdev: SCSI device to examine 1094 * 1095 * This is called before we actually start reading 1096 * and writing to the device, to configure certain 1097 * SCSI mid-layer behaviors. 1098 * 1099 * LOCKING: 1100 * Defined by SCSI layer. We don't really care. 1101 */ 1102 1103 int ata_scsi_slave_config(struct scsi_device *sdev) 1104 { 1105 struct ata_port *ap = ata_shost_to_port(sdev->host); 1106 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1107 int rc = 0; 1108 1109 ata_scsi_sdev_config(sdev); 1110 1111 if (dev) 1112 rc = ata_scsi_dev_config(sdev, dev); 1113 1114 return rc; 1115 } 1116 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1117 1118 /** 1119 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1120 * @sdev: SCSI device to be destroyed 1121 * 1122 * @sdev is about to be destroyed for hot/warm unplugging. If 1123 * this unplugging was initiated by libata as indicated by NULL 1124 * dev->sdev, this function doesn't have to do anything. 1125 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1126 * Clear dev->sdev, schedule the device for ATA detach and invoke 1127 * EH. 1128 * 1129 * LOCKING: 1130 * Defined by SCSI layer. We don't really care. 1131 */ 1132 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1133 { 1134 struct ata_port *ap = ata_shost_to_port(sdev->host); 1135 unsigned long flags; 1136 struct ata_device *dev; 1137 1138 if (!ap->ops->error_handler) 1139 return; 1140 1141 spin_lock_irqsave(ap->lock, flags); 1142 dev = __ata_scsi_find_dev(ap, sdev); 1143 if (dev && dev->sdev) { 1144 /* SCSI device already in CANCEL state, no need to offline it */ 1145 dev->sdev = NULL; 1146 dev->flags |= ATA_DFLAG_DETACH; 1147 ata_port_schedule_eh(ap); 1148 } 1149 spin_unlock_irqrestore(ap->lock, flags); 1150 1151 kfree(sdev->dma_drain_buf); 1152 } 1153 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1154 1155 /** 1156 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1157 * @qc: Storage for translated ATA taskfile 1158 * 1159 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1160 * (to start). Perhaps these commands should be preceded by 1161 * CHECK POWER MODE to see what power mode the device is already in. 1162 * [See SAT revision 5 at www.t10.org] 1163 * 1164 * LOCKING: 1165 * spin_lock_irqsave(host lock) 1166 * 1167 * RETURNS: 1168 * Zero on success, non-zero on error. 1169 */ 1170 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1171 { 1172 struct scsi_cmnd *scmd = qc->scsicmd; 1173 struct ata_taskfile *tf = &qc->tf; 1174 const u8 *cdb = scmd->cmnd; 1175 u16 fp; 1176 u8 bp = 0xff; 1177 1178 if (scmd->cmd_len < 5) { 1179 fp = 4; 1180 goto invalid_fld; 1181 } 1182 1183 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1184 tf->protocol = ATA_PROT_NODATA; 1185 if (cdb[1] & 0x1) { 1186 ; /* ignore IMMED bit, violates sat-r05 */ 1187 } 1188 if (cdb[4] & 0x2) { 1189 fp = 4; 1190 bp = 1; 1191 goto invalid_fld; /* LOEJ bit set not supported */ 1192 } 1193 if (((cdb[4] >> 4) & 0xf) != 0) { 1194 fp = 4; 1195 bp = 3; 1196 goto invalid_fld; /* power conditions not supported */ 1197 } 1198 1199 if (cdb[4] & 0x1) { 1200 tf->nsect = 1; /* 1 sector, lba=0 */ 1201 1202 if (qc->dev->flags & ATA_DFLAG_LBA) { 1203 tf->flags |= ATA_TFLAG_LBA; 1204 1205 tf->lbah = 0x0; 1206 tf->lbam = 0x0; 1207 tf->lbal = 0x0; 1208 tf->device |= ATA_LBA; 1209 } else { 1210 /* CHS */ 1211 tf->lbal = 0x1; /* sect */ 1212 tf->lbam = 0x0; /* cyl low */ 1213 tf->lbah = 0x0; /* cyl high */ 1214 } 1215 1216 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1217 } else { 1218 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1219 * or S5) causing some drives to spin up and down again. 1220 */ 1221 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1222 system_state == SYSTEM_POWER_OFF) 1223 goto skip; 1224 1225 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1226 system_entering_hibernation()) 1227 goto skip; 1228 1229 /* Issue ATA STANDBY IMMEDIATE command */ 1230 tf->command = ATA_CMD_STANDBYNOW1; 1231 } 1232 1233 /* 1234 * Standby and Idle condition timers could be implemented but that 1235 * would require libata to implement the Power condition mode page 1236 * and allow the user to change it. Changing mode pages requires 1237 * MODE SELECT to be implemented. 1238 */ 1239 1240 return 0; 1241 1242 invalid_fld: 1243 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1244 return 1; 1245 skip: 1246 scmd->result = SAM_STAT_GOOD; 1247 return 1; 1248 } 1249 1250 1251 /** 1252 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1253 * @qc: Storage for translated ATA taskfile 1254 * 1255 * Sets up an ATA taskfile to issue FLUSH CACHE or 1256 * FLUSH CACHE EXT. 1257 * 1258 * LOCKING: 1259 * spin_lock_irqsave(host lock) 1260 * 1261 * RETURNS: 1262 * Zero on success, non-zero on error. 1263 */ 1264 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1265 { 1266 struct ata_taskfile *tf = &qc->tf; 1267 1268 tf->flags |= ATA_TFLAG_DEVICE; 1269 tf->protocol = ATA_PROT_NODATA; 1270 1271 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1272 tf->command = ATA_CMD_FLUSH_EXT; 1273 else 1274 tf->command = ATA_CMD_FLUSH; 1275 1276 /* flush is critical for IO integrity, consider it an IO command */ 1277 qc->flags |= ATA_QCFLAG_IO; 1278 1279 return 0; 1280 } 1281 1282 /** 1283 * scsi_6_lba_len - Get LBA and transfer length 1284 * @cdb: SCSI command to translate 1285 * 1286 * Calculate LBA and transfer length for 6-byte commands. 1287 * 1288 * RETURNS: 1289 * @plba: the LBA 1290 * @plen: the transfer length 1291 */ 1292 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1293 { 1294 u64 lba = 0; 1295 u32 len; 1296 1297 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1298 lba |= ((u64)cdb[2]) << 8; 1299 lba |= ((u64)cdb[3]); 1300 1301 len = cdb[4]; 1302 1303 *plba = lba; 1304 *plen = len; 1305 } 1306 1307 /** 1308 * scsi_10_lba_len - Get LBA and transfer length 1309 * @cdb: SCSI command to translate 1310 * 1311 * Calculate LBA and transfer length for 10-byte commands. 1312 * 1313 * RETURNS: 1314 * @plba: the LBA 1315 * @plen: the transfer length 1316 */ 1317 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1318 { 1319 *plba = get_unaligned_be32(&cdb[2]); 1320 *plen = get_unaligned_be16(&cdb[7]); 1321 } 1322 1323 /** 1324 * scsi_16_lba_len - Get LBA and transfer length 1325 * @cdb: SCSI command to translate 1326 * 1327 * Calculate LBA and transfer length for 16-byte commands. 1328 * 1329 * RETURNS: 1330 * @plba: the LBA 1331 * @plen: the transfer length 1332 */ 1333 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1334 { 1335 *plba = get_unaligned_be64(&cdb[2]); 1336 *plen = get_unaligned_be32(&cdb[10]); 1337 } 1338 1339 /** 1340 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1341 * @qc: Storage for translated ATA taskfile 1342 * 1343 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1344 * 1345 * LOCKING: 1346 * spin_lock_irqsave(host lock) 1347 * 1348 * RETURNS: 1349 * Zero on success, non-zero on error. 1350 */ 1351 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1352 { 1353 struct scsi_cmnd *scmd = qc->scsicmd; 1354 struct ata_taskfile *tf = &qc->tf; 1355 struct ata_device *dev = qc->dev; 1356 u64 dev_sectors = qc->dev->n_sectors; 1357 const u8 *cdb = scmd->cmnd; 1358 u64 block; 1359 u32 n_block; 1360 u16 fp; 1361 1362 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1363 tf->protocol = ATA_PROT_NODATA; 1364 1365 switch (cdb[0]) { 1366 case VERIFY: 1367 if (scmd->cmd_len < 10) { 1368 fp = 9; 1369 goto invalid_fld; 1370 } 1371 scsi_10_lba_len(cdb, &block, &n_block); 1372 break; 1373 case VERIFY_16: 1374 if (scmd->cmd_len < 16) { 1375 fp = 15; 1376 goto invalid_fld; 1377 } 1378 scsi_16_lba_len(cdb, &block, &n_block); 1379 break; 1380 default: 1381 fp = 0; 1382 goto invalid_fld; 1383 } 1384 1385 if (!n_block) 1386 goto nothing_to_do; 1387 if (block >= dev_sectors) 1388 goto out_of_range; 1389 if ((block + n_block) > dev_sectors) 1390 goto out_of_range; 1391 1392 if (dev->flags & ATA_DFLAG_LBA) { 1393 tf->flags |= ATA_TFLAG_LBA; 1394 1395 if (lba_28_ok(block, n_block)) { 1396 /* use LBA28 */ 1397 tf->command = ATA_CMD_VERIFY; 1398 tf->device |= (block >> 24) & 0xf; 1399 } else if (lba_48_ok(block, n_block)) { 1400 if (!(dev->flags & ATA_DFLAG_LBA48)) 1401 goto out_of_range; 1402 1403 /* use LBA48 */ 1404 tf->flags |= ATA_TFLAG_LBA48; 1405 tf->command = ATA_CMD_VERIFY_EXT; 1406 1407 tf->hob_nsect = (n_block >> 8) & 0xff; 1408 1409 tf->hob_lbah = (block >> 40) & 0xff; 1410 tf->hob_lbam = (block >> 32) & 0xff; 1411 tf->hob_lbal = (block >> 24) & 0xff; 1412 } else 1413 /* request too large even for LBA48 */ 1414 goto out_of_range; 1415 1416 tf->nsect = n_block & 0xff; 1417 1418 tf->lbah = (block >> 16) & 0xff; 1419 tf->lbam = (block >> 8) & 0xff; 1420 tf->lbal = block & 0xff; 1421 1422 tf->device |= ATA_LBA; 1423 } else { 1424 /* CHS */ 1425 u32 sect, head, cyl, track; 1426 1427 if (!lba_28_ok(block, n_block)) 1428 goto out_of_range; 1429 1430 /* Convert LBA to CHS */ 1431 track = (u32)block / dev->sectors; 1432 cyl = track / dev->heads; 1433 head = track % dev->heads; 1434 sect = (u32)block % dev->sectors + 1; 1435 1436 /* Check whether the converted CHS can fit. 1437 Cylinder: 0-65535 1438 Head: 0-15 1439 Sector: 1-255*/ 1440 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1441 goto out_of_range; 1442 1443 tf->command = ATA_CMD_VERIFY; 1444 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1445 tf->lbal = sect; 1446 tf->lbam = cyl; 1447 tf->lbah = cyl >> 8; 1448 tf->device |= head; 1449 } 1450 1451 return 0; 1452 1453 invalid_fld: 1454 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1455 return 1; 1456 1457 out_of_range: 1458 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1459 /* "Logical Block Address out of range" */ 1460 return 1; 1461 1462 nothing_to_do: 1463 scmd->result = SAM_STAT_GOOD; 1464 return 1; 1465 } 1466 1467 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1468 { 1469 struct request *rq = scsi_cmd_to_rq(scmd); 1470 u32 req_blocks; 1471 1472 if (!blk_rq_is_passthrough(rq)) 1473 return true; 1474 1475 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1476 if (n_blocks > req_blocks) 1477 return false; 1478 1479 return true; 1480 } 1481 1482 /** 1483 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1484 * @qc: Storage for translated ATA taskfile 1485 * 1486 * Converts any of six SCSI read/write commands into the 1487 * ATA counterpart, including starting sector (LBA), 1488 * sector count, and taking into account the device's LBA48 1489 * support. 1490 * 1491 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1492 * %WRITE_16 are currently supported. 1493 * 1494 * LOCKING: 1495 * spin_lock_irqsave(host lock) 1496 * 1497 * RETURNS: 1498 * Zero on success, non-zero on error. 1499 */ 1500 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1501 { 1502 struct scsi_cmnd *scmd = qc->scsicmd; 1503 const u8 *cdb = scmd->cmnd; 1504 struct request *rq = scsi_cmd_to_rq(scmd); 1505 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1506 unsigned int tf_flags = 0; 1507 u64 block; 1508 u32 n_block; 1509 int rc; 1510 u16 fp = 0; 1511 1512 switch (cdb[0]) { 1513 case WRITE_6: 1514 case WRITE_10: 1515 case WRITE_16: 1516 tf_flags |= ATA_TFLAG_WRITE; 1517 break; 1518 } 1519 1520 /* Calculate the SCSI LBA, transfer length and FUA. */ 1521 switch (cdb[0]) { 1522 case READ_10: 1523 case WRITE_10: 1524 if (unlikely(scmd->cmd_len < 10)) { 1525 fp = 9; 1526 goto invalid_fld; 1527 } 1528 scsi_10_lba_len(cdb, &block, &n_block); 1529 if (cdb[1] & (1 << 3)) 1530 tf_flags |= ATA_TFLAG_FUA; 1531 if (!ata_check_nblocks(scmd, n_block)) 1532 goto invalid_fld; 1533 break; 1534 case READ_6: 1535 case WRITE_6: 1536 if (unlikely(scmd->cmd_len < 6)) { 1537 fp = 5; 1538 goto invalid_fld; 1539 } 1540 scsi_6_lba_len(cdb, &block, &n_block); 1541 1542 /* for 6-byte r/w commands, transfer length 0 1543 * means 256 blocks of data, not 0 block. 1544 */ 1545 if (!n_block) 1546 n_block = 256; 1547 if (!ata_check_nblocks(scmd, n_block)) 1548 goto invalid_fld; 1549 break; 1550 case READ_16: 1551 case WRITE_16: 1552 if (unlikely(scmd->cmd_len < 16)) { 1553 fp = 15; 1554 goto invalid_fld; 1555 } 1556 scsi_16_lba_len(cdb, &block, &n_block); 1557 if (cdb[1] & (1 << 3)) 1558 tf_flags |= ATA_TFLAG_FUA; 1559 if (!ata_check_nblocks(scmd, n_block)) 1560 goto invalid_fld; 1561 break; 1562 default: 1563 fp = 0; 1564 goto invalid_fld; 1565 } 1566 1567 /* Check and compose ATA command */ 1568 if (!n_block) 1569 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1570 * length 0 means transfer 0 block of data. 1571 * However, for ATA R/W commands, sector count 0 means 1572 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1573 * 1574 * WARNING: one or two older ATA drives treat 0 as 0... 1575 */ 1576 goto nothing_to_do; 1577 1578 qc->flags |= ATA_QCFLAG_IO; 1579 qc->nbytes = n_block * scmd->device->sector_size; 1580 1581 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1582 qc->hw_tag, class); 1583 1584 if (likely(rc == 0)) 1585 return 0; 1586 1587 if (rc == -ERANGE) 1588 goto out_of_range; 1589 /* treat all other errors as -EINVAL, fall through */ 1590 invalid_fld: 1591 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1592 return 1; 1593 1594 out_of_range: 1595 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1596 /* "Logical Block Address out of range" */ 1597 return 1; 1598 1599 nothing_to_do: 1600 scmd->result = SAM_STAT_GOOD; 1601 return 1; 1602 } 1603 1604 static void ata_qc_done(struct ata_queued_cmd *qc) 1605 { 1606 struct scsi_cmnd *cmd = qc->scsicmd; 1607 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1608 1609 ata_qc_free(qc); 1610 done(cmd); 1611 } 1612 1613 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1614 { 1615 struct ata_port *ap = qc->ap; 1616 struct scsi_cmnd *cmd = qc->scsicmd; 1617 u8 *cdb = cmd->cmnd; 1618 int need_sense = (qc->err_mask != 0); 1619 1620 /* For ATA pass thru (SAT) commands, generate a sense block if 1621 * user mandated it or if there's an error. Note that if we 1622 * generate because the user forced us to [CK_COND =1], a check 1623 * condition is generated and the ATA register values are returned 1624 * whether the command completed successfully or not. If there 1625 * was no error, we use the following sense data: 1626 * sk = RECOVERED ERROR 1627 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1628 */ 1629 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1630 ((cdb[2] & 0x20) || need_sense)) 1631 ata_gen_passthru_sense(qc); 1632 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1633 cmd->result = SAM_STAT_CHECK_CONDITION; 1634 else if (need_sense) 1635 ata_gen_ata_sense(qc); 1636 else 1637 cmd->result = SAM_STAT_GOOD; 1638 1639 if (need_sense && !ap->ops->error_handler) 1640 ata_dump_status(ap, &qc->result_tf); 1641 1642 ata_qc_done(qc); 1643 } 1644 1645 /** 1646 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1647 * @dev: ATA device to which the command is addressed 1648 * @cmd: SCSI command to execute 1649 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1650 * 1651 * Our ->queuecommand() function has decided that the SCSI 1652 * command issued can be directly translated into an ATA 1653 * command, rather than handled internally. 1654 * 1655 * This function sets up an ata_queued_cmd structure for the 1656 * SCSI command, and sends that ata_queued_cmd to the hardware. 1657 * 1658 * The xlat_func argument (actor) returns 0 if ready to execute 1659 * ATA command, else 1 to finish translation. If 1 is returned 1660 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1661 * to be set reflecting an error condition or clean (early) 1662 * termination. 1663 * 1664 * LOCKING: 1665 * spin_lock_irqsave(host lock) 1666 * 1667 * RETURNS: 1668 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1669 * needs to be deferred. 1670 */ 1671 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1672 ata_xlat_func_t xlat_func) 1673 { 1674 struct ata_port *ap = dev->link->ap; 1675 struct ata_queued_cmd *qc; 1676 int rc; 1677 1678 qc = ata_scsi_qc_new(dev, cmd); 1679 if (!qc) 1680 goto err_mem; 1681 1682 /* data is present; dma-map it */ 1683 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1684 cmd->sc_data_direction == DMA_TO_DEVICE) { 1685 if (unlikely(scsi_bufflen(cmd) < 1)) { 1686 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1687 goto err_did; 1688 } 1689 1690 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1691 1692 qc->dma_dir = cmd->sc_data_direction; 1693 } 1694 1695 qc->complete_fn = ata_scsi_qc_complete; 1696 1697 if (xlat_func(qc)) 1698 goto early_finish; 1699 1700 if (ap->ops->qc_defer) { 1701 if ((rc = ap->ops->qc_defer(qc))) 1702 goto defer; 1703 } 1704 1705 /* select device, send command to hardware */ 1706 ata_qc_issue(qc); 1707 1708 return 0; 1709 1710 early_finish: 1711 ata_qc_free(qc); 1712 scsi_done(cmd); 1713 return 0; 1714 1715 err_did: 1716 ata_qc_free(qc); 1717 cmd->result = (DID_ERROR << 16); 1718 scsi_done(cmd); 1719 err_mem: 1720 return 0; 1721 1722 defer: 1723 ata_qc_free(qc); 1724 if (rc == ATA_DEFER_LINK) 1725 return SCSI_MLQUEUE_DEVICE_BUSY; 1726 else 1727 return SCSI_MLQUEUE_HOST_BUSY; 1728 } 1729 1730 struct ata_scsi_args { 1731 struct ata_device *dev; 1732 u16 *id; 1733 struct scsi_cmnd *cmd; 1734 }; 1735 1736 /** 1737 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1738 * @args: device IDENTIFY data / SCSI command of interest. 1739 * @actor: Callback hook for desired SCSI command simulator 1740 * 1741 * Takes care of the hard work of simulating a SCSI command... 1742 * Mapping the response buffer, calling the command's handler, 1743 * and handling the handler's return value. This return value 1744 * indicates whether the handler wishes the SCSI command to be 1745 * completed successfully (0), or not (in which case cmd->result 1746 * and sense buffer are assumed to be set). 1747 * 1748 * LOCKING: 1749 * spin_lock_irqsave(host lock) 1750 */ 1751 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1752 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1753 { 1754 unsigned int rc; 1755 struct scsi_cmnd *cmd = args->cmd; 1756 unsigned long flags; 1757 1758 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1759 1760 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1761 rc = actor(args, ata_scsi_rbuf); 1762 if (rc == 0) 1763 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1764 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1765 1766 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1767 1768 if (rc == 0) 1769 cmd->result = SAM_STAT_GOOD; 1770 } 1771 1772 /** 1773 * ata_scsiop_inq_std - Simulate INQUIRY command 1774 * @args: device IDENTIFY data / SCSI command of interest. 1775 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1776 * 1777 * Returns standard device identification data associated 1778 * with non-VPD INQUIRY command output. 1779 * 1780 * LOCKING: 1781 * spin_lock_irqsave(host lock) 1782 */ 1783 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1784 { 1785 static const u8 versions[] = { 1786 0x00, 1787 0x60, /* SAM-3 (no version claimed) */ 1788 1789 0x03, 1790 0x20, /* SBC-2 (no version claimed) */ 1791 1792 0x03, 1793 0x00 /* SPC-3 (no version claimed) */ 1794 }; 1795 static const u8 versions_zbc[] = { 1796 0x00, 1797 0xA0, /* SAM-5 (no version claimed) */ 1798 1799 0x06, 1800 0x00, /* SBC-4 (no version claimed) */ 1801 1802 0x05, 1803 0xC0, /* SPC-5 (no version claimed) */ 1804 1805 0x60, 1806 0x24, /* ZBC r05 */ 1807 }; 1808 1809 u8 hdr[] = { 1810 TYPE_DISK, 1811 0, 1812 0x5, /* claim SPC-3 version compatibility */ 1813 2, 1814 95 - 4, 1815 0, 1816 0, 1817 2 1818 }; 1819 1820 /* set scsi removable (RMB) bit per ata bit, or if the 1821 * AHCI port says it's external (Hotplug-capable, eSATA). 1822 */ 1823 if (ata_id_removable(args->id) || 1824 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1825 hdr[1] |= (1 << 7); 1826 1827 if (args->dev->class == ATA_DEV_ZAC) { 1828 hdr[0] = TYPE_ZBC; 1829 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1830 } 1831 1832 memcpy(rbuf, hdr, sizeof(hdr)); 1833 memcpy(&rbuf[8], "ATA ", 8); 1834 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1835 1836 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1837 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1838 if (strncmp(&rbuf[32], " ", 4) == 0) 1839 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1840 1841 if (rbuf[32] == 0 || rbuf[32] == ' ') 1842 memcpy(&rbuf[32], "n/a ", 4); 1843 1844 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1845 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1846 else 1847 memcpy(rbuf + 58, versions, sizeof(versions)); 1848 1849 return 0; 1850 } 1851 1852 /** 1853 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1854 * @args: device IDENTIFY data / SCSI command of interest. 1855 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1856 * 1857 * Returns list of inquiry VPD pages available. 1858 * 1859 * LOCKING: 1860 * spin_lock_irqsave(host lock) 1861 */ 1862 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1863 { 1864 int i, num_pages = 0; 1865 static const u8 pages[] = { 1866 0x00, /* page 0x00, this page */ 1867 0x80, /* page 0x80, unit serial no page */ 1868 0x83, /* page 0x83, device ident page */ 1869 0x89, /* page 0x89, ata info page */ 1870 0xb0, /* page 0xb0, block limits page */ 1871 0xb1, /* page 0xb1, block device characteristics page */ 1872 0xb2, /* page 0xb2, thin provisioning page */ 1873 0xb6, /* page 0xb6, zoned block device characteristics */ 1874 0xb9, /* page 0xb9, concurrent positioning ranges */ 1875 }; 1876 1877 for (i = 0; i < sizeof(pages); i++) { 1878 if (pages[i] == 0xb6 && 1879 !(args->dev->flags & ATA_DFLAG_ZAC)) 1880 continue; 1881 rbuf[num_pages + 4] = pages[i]; 1882 num_pages++; 1883 } 1884 rbuf[3] = num_pages; /* number of supported VPD pages */ 1885 return 0; 1886 } 1887 1888 /** 1889 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1890 * @args: device IDENTIFY data / SCSI command of interest. 1891 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1892 * 1893 * Returns ATA device serial number. 1894 * 1895 * LOCKING: 1896 * spin_lock_irqsave(host lock) 1897 */ 1898 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1899 { 1900 static const u8 hdr[] = { 1901 0, 1902 0x80, /* this page code */ 1903 0, 1904 ATA_ID_SERNO_LEN, /* page len */ 1905 }; 1906 1907 memcpy(rbuf, hdr, sizeof(hdr)); 1908 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1909 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1910 return 0; 1911 } 1912 1913 /** 1914 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1915 * @args: device IDENTIFY data / SCSI command of interest. 1916 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1917 * 1918 * Yields two logical unit device identification designators: 1919 * - vendor specific ASCII containing the ATA serial number 1920 * - SAT defined "t10 vendor id based" containing ASCII vendor 1921 * name ("ATA "), model and serial numbers. 1922 * 1923 * LOCKING: 1924 * spin_lock_irqsave(host lock) 1925 */ 1926 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 1927 { 1928 const int sat_model_serial_desc_len = 68; 1929 int num; 1930 1931 rbuf[1] = 0x83; /* this page code */ 1932 num = 4; 1933 1934 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1935 rbuf[num + 0] = 2; 1936 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1937 num += 4; 1938 ata_id_string(args->id, (unsigned char *) rbuf + num, 1939 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1940 num += ATA_ID_SERNO_LEN; 1941 1942 /* SAT defined lu model and serial numbers descriptor */ 1943 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 1944 rbuf[num + 0] = 2; 1945 rbuf[num + 1] = 1; 1946 rbuf[num + 3] = sat_model_serial_desc_len; 1947 num += 4; 1948 memcpy(rbuf + num, "ATA ", 8); 1949 num += 8; 1950 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 1951 ATA_ID_PROD_LEN); 1952 num += ATA_ID_PROD_LEN; 1953 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 1954 ATA_ID_SERNO_LEN); 1955 num += ATA_ID_SERNO_LEN; 1956 1957 if (ata_id_has_wwn(args->id)) { 1958 /* SAT defined lu world wide name */ 1959 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 1960 rbuf[num + 0] = 1; 1961 rbuf[num + 1] = 3; 1962 rbuf[num + 3] = ATA_ID_WWN_LEN; 1963 num += 4; 1964 ata_id_string(args->id, (unsigned char *) rbuf + num, 1965 ATA_ID_WWN, ATA_ID_WWN_LEN); 1966 num += ATA_ID_WWN_LEN; 1967 } 1968 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 1969 return 0; 1970 } 1971 1972 /** 1973 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 1974 * @args: device IDENTIFY data / SCSI command of interest. 1975 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1976 * 1977 * Yields SAT-specified ATA VPD page. 1978 * 1979 * LOCKING: 1980 * spin_lock_irqsave(host lock) 1981 */ 1982 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 1983 { 1984 rbuf[1] = 0x89; /* our page code */ 1985 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 1986 rbuf[3] = (0x238 & 0xff); 1987 1988 memcpy(&rbuf[8], "linux ", 8); 1989 memcpy(&rbuf[16], "libata ", 16); 1990 memcpy(&rbuf[32], DRV_VERSION, 4); 1991 1992 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 1993 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 1994 /* TODO: PMP? */ 1995 1996 /* we don't store the ATA device signature, so we fake it */ 1997 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 1998 rbuf[40] = 0x1; 1999 rbuf[48] = 0x1; 2000 2001 rbuf[56] = ATA_CMD_ID_ATA; 2002 2003 memcpy(&rbuf[60], &args->id[0], 512); 2004 return 0; 2005 } 2006 2007 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2008 { 2009 struct ata_device *dev = args->dev; 2010 u16 min_io_sectors; 2011 2012 rbuf[1] = 0xb0; 2013 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2014 2015 /* 2016 * Optimal transfer length granularity. 2017 * 2018 * This is always one physical block, but for disks with a smaller 2019 * logical than physical sector size we need to figure out what the 2020 * latter is. 2021 */ 2022 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2023 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2024 2025 /* 2026 * Optimal unmap granularity. 2027 * 2028 * The ATA spec doesn't even know about a granularity or alignment 2029 * for the TRIM command. We can leave away most of the unmap related 2030 * VPD page entries, but we have specifify a granularity to signal 2031 * that we support some form of unmap - in thise case via WRITE SAME 2032 * with the unmap bit set. 2033 */ 2034 if (ata_id_has_trim(args->id)) { 2035 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2036 2037 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2038 max_blocks = 128 << (20 - SECTOR_SHIFT); 2039 2040 put_unaligned_be64(max_blocks, &rbuf[36]); 2041 put_unaligned_be32(1, &rbuf[28]); 2042 } 2043 2044 return 0; 2045 } 2046 2047 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2048 { 2049 int form_factor = ata_id_form_factor(args->id); 2050 int media_rotation_rate = ata_id_rotation_rate(args->id); 2051 u8 zoned = ata_id_zoned_cap(args->id); 2052 2053 rbuf[1] = 0xb1; 2054 rbuf[3] = 0x3c; 2055 rbuf[4] = media_rotation_rate >> 8; 2056 rbuf[5] = media_rotation_rate; 2057 rbuf[7] = form_factor; 2058 if (zoned) 2059 rbuf[8] = (zoned << 4); 2060 2061 return 0; 2062 } 2063 2064 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2065 { 2066 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2067 rbuf[1] = 0xb2; 2068 rbuf[3] = 0x4; 2069 rbuf[5] = 1 << 6; /* TPWS */ 2070 2071 return 0; 2072 } 2073 2074 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2075 { 2076 /* 2077 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2078 */ 2079 rbuf[1] = 0xb6; 2080 rbuf[3] = 0x3C; 2081 2082 /* 2083 * URSWRZ bit is only meaningful for host-managed ZAC drives 2084 */ 2085 if (args->dev->zac_zoned_cap & 1) 2086 rbuf[4] |= 1; 2087 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2088 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2089 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2090 2091 return 0; 2092 } 2093 2094 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2095 { 2096 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2097 u8 *desc = &rbuf[64]; 2098 int i; 2099 2100 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2101 rbuf[1] = 0xb9; 2102 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[3]); 2103 2104 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2105 desc[0] = cpr_log->cpr[i].num; 2106 desc[1] = cpr_log->cpr[i].num_storage_elements; 2107 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2108 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2109 } 2110 2111 return 0; 2112 } 2113 2114 /** 2115 * modecpy - Prepare response for MODE SENSE 2116 * @dest: output buffer 2117 * @src: data being copied 2118 * @n: length of mode page 2119 * @changeable: whether changeable parameters are requested 2120 * 2121 * Generate a generic MODE SENSE page for either current or changeable 2122 * parameters. 2123 * 2124 * LOCKING: 2125 * None. 2126 */ 2127 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2128 { 2129 if (changeable) { 2130 memcpy(dest, src, 2); 2131 memset(dest + 2, 0, n - 2); 2132 } else { 2133 memcpy(dest, src, n); 2134 } 2135 } 2136 2137 /** 2138 * ata_msense_caching - Simulate MODE SENSE caching info page 2139 * @id: device IDENTIFY data 2140 * @buf: output buffer 2141 * @changeable: whether changeable parameters are requested 2142 * 2143 * Generate a caching info page, which conditionally indicates 2144 * write caching to the SCSI layer, depending on device 2145 * capabilities. 2146 * 2147 * LOCKING: 2148 * None. 2149 */ 2150 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2151 { 2152 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2153 if (changeable) { 2154 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2155 } else { 2156 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2157 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2158 } 2159 return sizeof(def_cache_mpage); 2160 } 2161 2162 /** 2163 * ata_msense_control - Simulate MODE SENSE control mode page 2164 * @dev: ATA device of interest 2165 * @buf: output buffer 2166 * @changeable: whether changeable parameters are requested 2167 * 2168 * Generate a generic MODE SENSE control mode page. 2169 * 2170 * LOCKING: 2171 * None. 2172 */ 2173 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2174 bool changeable) 2175 { 2176 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2177 if (changeable) { 2178 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2179 } else { 2180 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2181 2182 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2183 } 2184 return sizeof(def_control_mpage); 2185 } 2186 2187 /** 2188 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2189 * @buf: output buffer 2190 * @changeable: whether changeable parameters are requested 2191 * 2192 * Generate a generic MODE SENSE r/w error recovery page. 2193 * 2194 * LOCKING: 2195 * None. 2196 */ 2197 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2198 { 2199 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2200 changeable); 2201 return sizeof(def_rw_recovery_mpage); 2202 } 2203 2204 /* 2205 * We can turn this into a real blacklist if it's needed, for now just 2206 * blacklist any Maxtor BANC1G10 revision firmware 2207 */ 2208 static int ata_dev_supports_fua(u16 *id) 2209 { 2210 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2211 2212 if (!libata_fua) 2213 return 0; 2214 if (!ata_id_has_fua(id)) 2215 return 0; 2216 2217 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2218 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2219 2220 if (strcmp(model, "Maxtor")) 2221 return 1; 2222 if (strcmp(fw, "BANC1G10")) 2223 return 1; 2224 2225 return 0; /* blacklisted */ 2226 } 2227 2228 /** 2229 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2230 * @args: device IDENTIFY data / SCSI command of interest. 2231 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2232 * 2233 * Simulate MODE SENSE commands. Assume this is invoked for direct 2234 * access devices (e.g. disks) only. There should be no block 2235 * descriptor for other device types. 2236 * 2237 * LOCKING: 2238 * spin_lock_irqsave(host lock) 2239 */ 2240 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2241 { 2242 struct ata_device *dev = args->dev; 2243 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2244 static const u8 sat_blk_desc[] = { 2245 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2246 0, 2247 0, 0x2, 0x0 /* block length: 512 bytes */ 2248 }; 2249 u8 pg, spg; 2250 unsigned int ebd, page_control, six_byte; 2251 u8 dpofua, bp = 0xff; 2252 u16 fp; 2253 2254 six_byte = (scsicmd[0] == MODE_SENSE); 2255 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2256 /* 2257 * LLBA bit in msense(10) ignored (compliant) 2258 */ 2259 2260 page_control = scsicmd[2] >> 6; 2261 switch (page_control) { 2262 case 0: /* current */ 2263 case 1: /* changeable */ 2264 case 2: /* defaults */ 2265 break; /* supported */ 2266 case 3: /* saved */ 2267 goto saving_not_supp; 2268 default: 2269 fp = 2; 2270 bp = 6; 2271 goto invalid_fld; 2272 } 2273 2274 if (six_byte) 2275 p += 4 + (ebd ? 8 : 0); 2276 else 2277 p += 8 + (ebd ? 8 : 0); 2278 2279 pg = scsicmd[2] & 0x3f; 2280 spg = scsicmd[3]; 2281 /* 2282 * No mode subpages supported (yet) but asking for _all_ 2283 * subpages may be valid 2284 */ 2285 if (spg && (spg != ALL_SUB_MPAGES)) { 2286 fp = 3; 2287 goto invalid_fld; 2288 } 2289 2290 switch(pg) { 2291 case RW_RECOVERY_MPAGE: 2292 p += ata_msense_rw_recovery(p, page_control == 1); 2293 break; 2294 2295 case CACHE_MPAGE: 2296 p += ata_msense_caching(args->id, p, page_control == 1); 2297 break; 2298 2299 case CONTROL_MPAGE: 2300 p += ata_msense_control(args->dev, p, page_control == 1); 2301 break; 2302 2303 case ALL_MPAGES: 2304 p += ata_msense_rw_recovery(p, page_control == 1); 2305 p += ata_msense_caching(args->id, p, page_control == 1); 2306 p += ata_msense_control(args->dev, p, page_control == 1); 2307 break; 2308 2309 default: /* invalid page code */ 2310 fp = 2; 2311 goto invalid_fld; 2312 } 2313 2314 dpofua = 0; 2315 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2316 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2317 dpofua = 1 << 4; 2318 2319 if (six_byte) { 2320 rbuf[0] = p - rbuf - 1; 2321 rbuf[2] |= dpofua; 2322 if (ebd) { 2323 rbuf[3] = sizeof(sat_blk_desc); 2324 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2325 } 2326 } else { 2327 unsigned int output_len = p - rbuf - 2; 2328 2329 rbuf[0] = output_len >> 8; 2330 rbuf[1] = output_len; 2331 rbuf[3] |= dpofua; 2332 if (ebd) { 2333 rbuf[7] = sizeof(sat_blk_desc); 2334 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2335 } 2336 } 2337 return 0; 2338 2339 invalid_fld: 2340 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2341 return 1; 2342 2343 saving_not_supp: 2344 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2345 /* "Saving parameters not supported" */ 2346 return 1; 2347 } 2348 2349 /** 2350 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2351 * @args: device IDENTIFY data / SCSI command of interest. 2352 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2353 * 2354 * Simulate READ CAPACITY commands. 2355 * 2356 * LOCKING: 2357 * None. 2358 */ 2359 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2360 { 2361 struct ata_device *dev = args->dev; 2362 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2363 u32 sector_size; /* physical sector size in bytes */ 2364 u8 log2_per_phys; 2365 u16 lowest_aligned; 2366 2367 sector_size = ata_id_logical_sector_size(dev->id); 2368 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2369 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2370 2371 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2372 if (last_lba >= 0xffffffffULL) 2373 last_lba = 0xffffffff; 2374 2375 /* sector count, 32-bit */ 2376 rbuf[0] = last_lba >> (8 * 3); 2377 rbuf[1] = last_lba >> (8 * 2); 2378 rbuf[2] = last_lba >> (8 * 1); 2379 rbuf[3] = last_lba; 2380 2381 /* sector size */ 2382 rbuf[4] = sector_size >> (8 * 3); 2383 rbuf[5] = sector_size >> (8 * 2); 2384 rbuf[6] = sector_size >> (8 * 1); 2385 rbuf[7] = sector_size; 2386 } else { 2387 /* sector count, 64-bit */ 2388 rbuf[0] = last_lba >> (8 * 7); 2389 rbuf[1] = last_lba >> (8 * 6); 2390 rbuf[2] = last_lba >> (8 * 5); 2391 rbuf[3] = last_lba >> (8 * 4); 2392 rbuf[4] = last_lba >> (8 * 3); 2393 rbuf[5] = last_lba >> (8 * 2); 2394 rbuf[6] = last_lba >> (8 * 1); 2395 rbuf[7] = last_lba; 2396 2397 /* sector size */ 2398 rbuf[ 8] = sector_size >> (8 * 3); 2399 rbuf[ 9] = sector_size >> (8 * 2); 2400 rbuf[10] = sector_size >> (8 * 1); 2401 rbuf[11] = sector_size; 2402 2403 rbuf[12] = 0; 2404 rbuf[13] = log2_per_phys; 2405 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2406 rbuf[15] = lowest_aligned; 2407 2408 if (ata_id_has_trim(args->id) && 2409 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2410 rbuf[14] |= 0x80; /* LBPME */ 2411 2412 if (ata_id_has_zero_after_trim(args->id) && 2413 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2414 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2415 rbuf[14] |= 0x40; /* LBPRZ */ 2416 } 2417 } 2418 if (ata_id_zoned_cap(args->id) || 2419 args->dev->class == ATA_DEV_ZAC) 2420 rbuf[12] = (1 << 4); /* RC_BASIS */ 2421 } 2422 return 0; 2423 } 2424 2425 /** 2426 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2427 * @args: device IDENTIFY data / SCSI command of interest. 2428 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2429 * 2430 * Simulate REPORT LUNS command. 2431 * 2432 * LOCKING: 2433 * spin_lock_irqsave(host lock) 2434 */ 2435 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2436 { 2437 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2438 2439 return 0; 2440 } 2441 2442 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2443 { 2444 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2445 /* FIXME: not quite right; we don't want the 2446 * translation of taskfile registers into 2447 * a sense descriptors, since that's only 2448 * correct for ATA, not ATAPI 2449 */ 2450 ata_gen_passthru_sense(qc); 2451 } 2452 2453 ata_qc_done(qc); 2454 } 2455 2456 /* is it pointless to prefer PIO for "safety reasons"? */ 2457 static inline int ata_pio_use_silly(struct ata_port *ap) 2458 { 2459 return (ap->flags & ATA_FLAG_PIO_DMA); 2460 } 2461 2462 static void atapi_request_sense(struct ata_queued_cmd *qc) 2463 { 2464 struct ata_port *ap = qc->ap; 2465 struct scsi_cmnd *cmd = qc->scsicmd; 2466 2467 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2468 2469 #ifdef CONFIG_ATA_SFF 2470 if (ap->ops->sff_tf_read) 2471 ap->ops->sff_tf_read(ap, &qc->tf); 2472 #endif 2473 2474 /* fill these in, for the case where they are -not- overwritten */ 2475 cmd->sense_buffer[0] = 0x70; 2476 cmd->sense_buffer[2] = qc->tf.error >> 4; 2477 2478 ata_qc_reinit(qc); 2479 2480 /* setup sg table and init transfer direction */ 2481 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2482 ata_sg_init(qc, &qc->sgent, 1); 2483 qc->dma_dir = DMA_FROM_DEVICE; 2484 2485 memset(&qc->cdb, 0, qc->dev->cdb_len); 2486 qc->cdb[0] = REQUEST_SENSE; 2487 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2488 2489 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2490 qc->tf.command = ATA_CMD_PACKET; 2491 2492 if (ata_pio_use_silly(ap)) { 2493 qc->tf.protocol = ATAPI_PROT_DMA; 2494 qc->tf.feature |= ATAPI_PKT_DMA; 2495 } else { 2496 qc->tf.protocol = ATAPI_PROT_PIO; 2497 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2498 qc->tf.lbah = 0; 2499 } 2500 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2501 2502 qc->complete_fn = atapi_sense_complete; 2503 2504 ata_qc_issue(qc); 2505 } 2506 2507 /* 2508 * ATAPI devices typically report zero for their SCSI version, and sometimes 2509 * deviate from the spec WRT response data format. If SCSI version is 2510 * reported as zero like normal, then we make the following fixups: 2511 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2512 * modern device. 2513 * 2) Ensure response data format / ATAPI information are always correct. 2514 */ 2515 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2516 { 2517 u8 buf[4]; 2518 2519 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2520 if (buf[2] == 0) { 2521 buf[2] = 0x5; 2522 buf[3] = 0x32; 2523 } 2524 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2525 } 2526 2527 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2528 { 2529 struct scsi_cmnd *cmd = qc->scsicmd; 2530 unsigned int err_mask = qc->err_mask; 2531 2532 /* handle completion from new EH */ 2533 if (unlikely(qc->ap->ops->error_handler && 2534 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2535 2536 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2537 /* FIXME: not quite right; we don't want the 2538 * translation of taskfile registers into a 2539 * sense descriptors, since that's only 2540 * correct for ATA, not ATAPI 2541 */ 2542 ata_gen_passthru_sense(qc); 2543 } 2544 2545 /* SCSI EH automatically locks door if sdev->locked is 2546 * set. Sometimes door lock request continues to 2547 * fail, for example, when no media is present. This 2548 * creates a loop - SCSI EH issues door lock which 2549 * fails and gets invoked again to acquire sense data 2550 * for the failed command. 2551 * 2552 * If door lock fails, always clear sdev->locked to 2553 * avoid this infinite loop. 2554 * 2555 * This may happen before SCSI scan is complete. Make 2556 * sure qc->dev->sdev isn't NULL before dereferencing. 2557 */ 2558 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2559 qc->dev->sdev->locked = 0; 2560 2561 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2562 ata_qc_done(qc); 2563 return; 2564 } 2565 2566 /* successful completion or old EH failure path */ 2567 if (unlikely(err_mask & AC_ERR_DEV)) { 2568 cmd->result = SAM_STAT_CHECK_CONDITION; 2569 atapi_request_sense(qc); 2570 return; 2571 } else if (unlikely(err_mask)) { 2572 /* FIXME: not quite right; we don't want the 2573 * translation of taskfile registers into 2574 * a sense descriptors, since that's only 2575 * correct for ATA, not ATAPI 2576 */ 2577 ata_gen_passthru_sense(qc); 2578 } else { 2579 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2580 atapi_fixup_inquiry(cmd); 2581 cmd->result = SAM_STAT_GOOD; 2582 } 2583 2584 ata_qc_done(qc); 2585 } 2586 /** 2587 * atapi_xlat - Initialize PACKET taskfile 2588 * @qc: command structure to be initialized 2589 * 2590 * LOCKING: 2591 * spin_lock_irqsave(host lock) 2592 * 2593 * RETURNS: 2594 * Zero on success, non-zero on failure. 2595 */ 2596 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2597 { 2598 struct scsi_cmnd *scmd = qc->scsicmd; 2599 struct ata_device *dev = qc->dev; 2600 int nodata = (scmd->sc_data_direction == DMA_NONE); 2601 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2602 unsigned int nbytes; 2603 2604 memset(qc->cdb, 0, dev->cdb_len); 2605 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2606 2607 qc->complete_fn = atapi_qc_complete; 2608 2609 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2610 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2611 qc->tf.flags |= ATA_TFLAG_WRITE; 2612 } 2613 2614 qc->tf.command = ATA_CMD_PACKET; 2615 ata_qc_set_pc_nbytes(qc); 2616 2617 /* check whether ATAPI DMA is safe */ 2618 if (!nodata && !using_pio && atapi_check_dma(qc)) 2619 using_pio = 1; 2620 2621 /* Some controller variants snoop this value for Packet 2622 * transfers to do state machine and FIFO management. Thus we 2623 * want to set it properly, and for DMA where it is 2624 * effectively meaningless. 2625 */ 2626 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2627 2628 /* Most ATAPI devices which honor transfer chunk size don't 2629 * behave according to the spec when odd chunk size which 2630 * matches the transfer length is specified. If the number of 2631 * bytes to transfer is 2n+1. According to the spec, what 2632 * should happen is to indicate that 2n+1 is going to be 2633 * transferred and transfer 2n+2 bytes where the last byte is 2634 * padding. 2635 * 2636 * In practice, this doesn't happen. ATAPI devices first 2637 * indicate and transfer 2n bytes and then indicate and 2638 * transfer 2 bytes where the last byte is padding. 2639 * 2640 * This inconsistency confuses several controllers which 2641 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2642 * These controllers use actual number of transferred bytes to 2643 * update DMA pointer and transfer of 4n+2 bytes make those 2644 * controller push DMA pointer by 4n+4 bytes because SATA data 2645 * FISes are aligned to 4 bytes. This causes data corruption 2646 * and buffer overrun. 2647 * 2648 * Always setting nbytes to even number solves this problem 2649 * because then ATAPI devices don't have to split data at 2n 2650 * boundaries. 2651 */ 2652 if (nbytes & 0x1) 2653 nbytes++; 2654 2655 qc->tf.lbam = (nbytes & 0xFF); 2656 qc->tf.lbah = (nbytes >> 8); 2657 2658 if (nodata) 2659 qc->tf.protocol = ATAPI_PROT_NODATA; 2660 else if (using_pio) 2661 qc->tf.protocol = ATAPI_PROT_PIO; 2662 else { 2663 /* DMA data xfer */ 2664 qc->tf.protocol = ATAPI_PROT_DMA; 2665 qc->tf.feature |= ATAPI_PKT_DMA; 2666 2667 if ((dev->flags & ATA_DFLAG_DMADIR) && 2668 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2669 /* some SATA bridges need us to indicate data xfer direction */ 2670 qc->tf.feature |= ATAPI_DMADIR; 2671 } 2672 2673 2674 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2675 as ATAPI tape drives don't get this right otherwise */ 2676 return 0; 2677 } 2678 2679 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2680 { 2681 if (!sata_pmp_attached(ap)) { 2682 if (likely(devno >= 0 && 2683 devno < ata_link_max_devices(&ap->link))) 2684 return &ap->link.device[devno]; 2685 } else { 2686 if (likely(devno >= 0 && 2687 devno < ap->nr_pmp_links)) 2688 return &ap->pmp_link[devno].device[0]; 2689 } 2690 2691 return NULL; 2692 } 2693 2694 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2695 const struct scsi_device *scsidev) 2696 { 2697 int devno; 2698 2699 /* skip commands not addressed to targets we simulate */ 2700 if (!sata_pmp_attached(ap)) { 2701 if (unlikely(scsidev->channel || scsidev->lun)) 2702 return NULL; 2703 devno = scsidev->id; 2704 } else { 2705 if (unlikely(scsidev->id || scsidev->lun)) 2706 return NULL; 2707 devno = scsidev->channel; 2708 } 2709 2710 return ata_find_dev(ap, devno); 2711 } 2712 2713 /** 2714 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2715 * @ap: ATA port to which the device is attached 2716 * @scsidev: SCSI device from which we derive the ATA device 2717 * 2718 * Given various information provided in struct scsi_cmnd, 2719 * map that onto an ATA bus, and using that mapping 2720 * determine which ata_device is associated with the 2721 * SCSI command to be sent. 2722 * 2723 * LOCKING: 2724 * spin_lock_irqsave(host lock) 2725 * 2726 * RETURNS: 2727 * Associated ATA device, or %NULL if not found. 2728 */ 2729 struct ata_device * 2730 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2731 { 2732 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2733 2734 if (unlikely(!dev || !ata_dev_enabled(dev))) 2735 return NULL; 2736 2737 return dev; 2738 } 2739 2740 /* 2741 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2742 * @byte1: Byte 1 from pass-thru CDB. 2743 * 2744 * RETURNS: 2745 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2746 */ 2747 static u8 2748 ata_scsi_map_proto(u8 byte1) 2749 { 2750 switch((byte1 & 0x1e) >> 1) { 2751 case 3: /* Non-data */ 2752 return ATA_PROT_NODATA; 2753 2754 case 6: /* DMA */ 2755 case 10: /* UDMA Data-in */ 2756 case 11: /* UDMA Data-Out */ 2757 return ATA_PROT_DMA; 2758 2759 case 4: /* PIO Data-in */ 2760 case 5: /* PIO Data-out */ 2761 return ATA_PROT_PIO; 2762 2763 case 12: /* FPDMA */ 2764 return ATA_PROT_NCQ; 2765 2766 case 0: /* Hard Reset */ 2767 case 1: /* SRST */ 2768 case 8: /* Device Diagnostic */ 2769 case 9: /* Device Reset */ 2770 case 7: /* DMA Queued */ 2771 case 15: /* Return Response Info */ 2772 default: /* Reserved */ 2773 break; 2774 } 2775 2776 return ATA_PROT_UNKNOWN; 2777 } 2778 2779 /** 2780 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2781 * @qc: command structure to be initialized 2782 * 2783 * Handles either 12, 16, or 32-byte versions of the CDB. 2784 * 2785 * RETURNS: 2786 * Zero on success, non-zero on failure. 2787 */ 2788 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2789 { 2790 struct ata_taskfile *tf = &(qc->tf); 2791 struct scsi_cmnd *scmd = qc->scsicmd; 2792 struct ata_device *dev = qc->dev; 2793 const u8 *cdb = scmd->cmnd; 2794 u16 fp; 2795 u16 cdb_offset = 0; 2796 2797 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2798 if (cdb[0] == VARIABLE_LENGTH_CMD) 2799 cdb_offset = 9; 2800 2801 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2802 if (tf->protocol == ATA_PROT_UNKNOWN) { 2803 fp = 1; 2804 goto invalid_fld; 2805 } 2806 2807 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 2808 /* 2809 * When T_LENGTH is zero (No data is transferred), dir should 2810 * be DMA_NONE. 2811 */ 2812 if (scmd->sc_data_direction != DMA_NONE) { 2813 fp = 2 + cdb_offset; 2814 goto invalid_fld; 2815 } 2816 2817 if (ata_is_ncq(tf->protocol)) 2818 tf->protocol = ATA_PROT_NCQ_NODATA; 2819 } 2820 2821 /* enable LBA */ 2822 tf->flags |= ATA_TFLAG_LBA; 2823 2824 /* 2825 * 12 and 16 byte CDBs use different offsets to 2826 * provide the various register values. 2827 */ 2828 switch (cdb[0]) { 2829 case ATA_16: 2830 /* 2831 * 16-byte CDB - may contain extended commands. 2832 * 2833 * If that is the case, copy the upper byte register values. 2834 */ 2835 if (cdb[1] & 0x01) { 2836 tf->hob_feature = cdb[3]; 2837 tf->hob_nsect = cdb[5]; 2838 tf->hob_lbal = cdb[7]; 2839 tf->hob_lbam = cdb[9]; 2840 tf->hob_lbah = cdb[11]; 2841 tf->flags |= ATA_TFLAG_LBA48; 2842 } else 2843 tf->flags &= ~ATA_TFLAG_LBA48; 2844 2845 /* 2846 * Always copy low byte, device and command registers. 2847 */ 2848 tf->feature = cdb[4]; 2849 tf->nsect = cdb[6]; 2850 tf->lbal = cdb[8]; 2851 tf->lbam = cdb[10]; 2852 tf->lbah = cdb[12]; 2853 tf->device = cdb[13]; 2854 tf->command = cdb[14]; 2855 break; 2856 case ATA_12: 2857 /* 2858 * 12-byte CDB - incapable of extended commands. 2859 */ 2860 tf->flags &= ~ATA_TFLAG_LBA48; 2861 2862 tf->feature = cdb[3]; 2863 tf->nsect = cdb[4]; 2864 tf->lbal = cdb[5]; 2865 tf->lbam = cdb[6]; 2866 tf->lbah = cdb[7]; 2867 tf->device = cdb[8]; 2868 tf->command = cdb[9]; 2869 break; 2870 default: 2871 /* 2872 * 32-byte CDB - may contain extended command fields. 2873 * 2874 * If that is the case, copy the upper byte register values. 2875 */ 2876 if (cdb[10] & 0x01) { 2877 tf->hob_feature = cdb[20]; 2878 tf->hob_nsect = cdb[22]; 2879 tf->hob_lbal = cdb[16]; 2880 tf->hob_lbam = cdb[15]; 2881 tf->hob_lbah = cdb[14]; 2882 tf->flags |= ATA_TFLAG_LBA48; 2883 } else 2884 tf->flags &= ~ATA_TFLAG_LBA48; 2885 2886 tf->feature = cdb[21]; 2887 tf->nsect = cdb[23]; 2888 tf->lbal = cdb[19]; 2889 tf->lbam = cdb[18]; 2890 tf->lbah = cdb[17]; 2891 tf->device = cdb[24]; 2892 tf->command = cdb[25]; 2893 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2894 break; 2895 } 2896 2897 /* For NCQ commands copy the tag value */ 2898 if (ata_is_ncq(tf->protocol)) 2899 tf->nsect = qc->hw_tag << 3; 2900 2901 /* enforce correct master/slave bit */ 2902 tf->device = dev->devno ? 2903 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2904 2905 switch (tf->command) { 2906 /* READ/WRITE LONG use a non-standard sect_size */ 2907 case ATA_CMD_READ_LONG: 2908 case ATA_CMD_READ_LONG_ONCE: 2909 case ATA_CMD_WRITE_LONG: 2910 case ATA_CMD_WRITE_LONG_ONCE: 2911 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 2912 fp = 1; 2913 goto invalid_fld; 2914 } 2915 qc->sect_size = scsi_bufflen(scmd); 2916 break; 2917 2918 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2919 case ATA_CMD_CFA_WRITE_NE: 2920 case ATA_CMD_CFA_TRANS_SECT: 2921 case ATA_CMD_CFA_WRITE_MULT_NE: 2922 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2923 case ATA_CMD_READ: 2924 case ATA_CMD_READ_EXT: 2925 case ATA_CMD_READ_QUEUED: 2926 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2927 case ATA_CMD_FPDMA_READ: 2928 case ATA_CMD_READ_MULTI: 2929 case ATA_CMD_READ_MULTI_EXT: 2930 case ATA_CMD_PIO_READ: 2931 case ATA_CMD_PIO_READ_EXT: 2932 case ATA_CMD_READ_STREAM_DMA_EXT: 2933 case ATA_CMD_READ_STREAM_EXT: 2934 case ATA_CMD_VERIFY: 2935 case ATA_CMD_VERIFY_EXT: 2936 case ATA_CMD_WRITE: 2937 case ATA_CMD_WRITE_EXT: 2938 case ATA_CMD_WRITE_FUA_EXT: 2939 case ATA_CMD_WRITE_QUEUED: 2940 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2941 case ATA_CMD_FPDMA_WRITE: 2942 case ATA_CMD_WRITE_MULTI: 2943 case ATA_CMD_WRITE_MULTI_EXT: 2944 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2945 case ATA_CMD_PIO_WRITE: 2946 case ATA_CMD_PIO_WRITE_EXT: 2947 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2948 case ATA_CMD_WRITE_STREAM_EXT: 2949 qc->sect_size = scmd->device->sector_size; 2950 break; 2951 2952 /* Everything else uses 512 byte "sectors" */ 2953 default: 2954 qc->sect_size = ATA_SECT_SIZE; 2955 } 2956 2957 /* 2958 * Set flags so that all registers will be written, pass on 2959 * write indication (used for PIO/DMA setup), result TF is 2960 * copied back and we don't whine too much about its failure. 2961 */ 2962 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2963 if (scmd->sc_data_direction == DMA_TO_DEVICE) 2964 tf->flags |= ATA_TFLAG_WRITE; 2965 2966 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 2967 2968 /* 2969 * Set transfer length. 2970 * 2971 * TODO: find out if we need to do more here to 2972 * cover scatter/gather case. 2973 */ 2974 ata_qc_set_pc_nbytes(qc); 2975 2976 /* We may not issue DMA commands if no DMA mode is set */ 2977 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 2978 fp = 1; 2979 goto invalid_fld; 2980 } 2981 2982 /* We may not issue NCQ commands to devices not supporting NCQ */ 2983 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 2984 fp = 1; 2985 goto invalid_fld; 2986 } 2987 2988 /* sanity check for pio multi commands */ 2989 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 2990 fp = 1; 2991 goto invalid_fld; 2992 } 2993 2994 if (is_multi_taskfile(tf)) { 2995 unsigned int multi_count = 1 << (cdb[1] >> 5); 2996 2997 /* compare the passed through multi_count 2998 * with the cached multi_count of libata 2999 */ 3000 if (multi_count != dev->multi_count) 3001 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3002 multi_count); 3003 } 3004 3005 /* 3006 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3007 * SET_FEATURES - XFER MODE must be preceded/succeeded 3008 * by an update to hardware-specific registers for each 3009 * controller (i.e. the reason for ->set_piomode(), 3010 * ->set_dmamode(), and ->post_set_mode() hooks). 3011 */ 3012 if (tf->command == ATA_CMD_SET_FEATURES && 3013 tf->feature == SETFEATURES_XFER) { 3014 fp = (cdb[0] == ATA_16) ? 4 : 3; 3015 goto invalid_fld; 3016 } 3017 3018 /* 3019 * Filter TPM commands by default. These provide an 3020 * essentially uncontrolled encrypted "back door" between 3021 * applications and the disk. Set libata.allow_tpm=1 if you 3022 * have a real reason for wanting to use them. This ensures 3023 * that installed software cannot easily mess stuff up without 3024 * user intent. DVR type users will probably ship with this enabled 3025 * for movie content management. 3026 * 3027 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3028 * for this and should do in future but that it is not sufficient as 3029 * DCS is an optional feature set. Thus we also do the software filter 3030 * so that we comply with the TC consortium stated goal that the user 3031 * can turn off TC features of their system. 3032 */ 3033 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3034 fp = (cdb[0] == ATA_16) ? 14 : 9; 3035 goto invalid_fld; 3036 } 3037 3038 return 0; 3039 3040 invalid_fld: 3041 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3042 return 1; 3043 } 3044 3045 /** 3046 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3047 * @cmd: SCSI command being translated 3048 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3049 * @sector: Starting sector 3050 * @count: Total Range of request in logical sectors 3051 * 3052 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3053 * descriptor. 3054 * 3055 * Upto 64 entries of the format: 3056 * 63:48 Range Length 3057 * 47:0 LBA 3058 * 3059 * Range Length of 0 is ignored. 3060 * LBA's should be sorted order and not overlap. 3061 * 3062 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3063 * 3064 * Return: Number of bytes copied into sglist. 3065 */ 3066 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3067 u64 sector, u32 count) 3068 { 3069 struct scsi_device *sdp = cmd->device; 3070 size_t len = sdp->sector_size; 3071 size_t r; 3072 __le64 *buf; 3073 u32 i = 0; 3074 unsigned long flags; 3075 3076 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3077 3078 if (len > ATA_SCSI_RBUF_SIZE) 3079 len = ATA_SCSI_RBUF_SIZE; 3080 3081 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3082 buf = ((void *)ata_scsi_rbuf); 3083 memset(buf, 0, len); 3084 while (i < trmax) { 3085 u64 entry = sector | 3086 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3087 buf[i++] = __cpu_to_le64(entry); 3088 if (count <= 0xffff) 3089 break; 3090 count -= 0xffff; 3091 sector += 0xffff; 3092 } 3093 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3094 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3095 3096 return r; 3097 } 3098 3099 /** 3100 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3101 * @qc: Command to be translated 3102 * 3103 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3104 * an SCT Write Same command. 3105 * Based on WRITE SAME has the UNMAP flag: 3106 * 3107 * - When set translate to DSM TRIM 3108 * - When clear translate to SCT Write Same 3109 */ 3110 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3111 { 3112 struct ata_taskfile *tf = &qc->tf; 3113 struct scsi_cmnd *scmd = qc->scsicmd; 3114 struct scsi_device *sdp = scmd->device; 3115 size_t len = sdp->sector_size; 3116 struct ata_device *dev = qc->dev; 3117 const u8 *cdb = scmd->cmnd; 3118 u64 block; 3119 u32 n_block; 3120 const u32 trmax = len >> 3; 3121 u32 size; 3122 u16 fp; 3123 u8 bp = 0xff; 3124 u8 unmap = cdb[1] & 0x8; 3125 3126 /* we may not issue DMA commands if no DMA mode is set */ 3127 if (unlikely(!ata_dma_enabled(dev))) 3128 goto invalid_opcode; 3129 3130 /* 3131 * We only allow sending this command through the block layer, 3132 * as it modifies the DATA OUT buffer, which would corrupt user 3133 * memory for SG_IO commands. 3134 */ 3135 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3136 goto invalid_opcode; 3137 3138 if (unlikely(scmd->cmd_len < 16)) { 3139 fp = 15; 3140 goto invalid_fld; 3141 } 3142 scsi_16_lba_len(cdb, &block, &n_block); 3143 3144 if (!unmap || 3145 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3146 !ata_id_has_trim(dev->id)) { 3147 fp = 1; 3148 bp = 3; 3149 goto invalid_fld; 3150 } 3151 /* If the request is too large the cmd is invalid */ 3152 if (n_block > 0xffff * trmax) { 3153 fp = 2; 3154 goto invalid_fld; 3155 } 3156 3157 /* 3158 * WRITE SAME always has a sector sized buffer as payload, this 3159 * should never be a multiple entry S/G list. 3160 */ 3161 if (!scsi_sg_count(scmd)) 3162 goto invalid_param_len; 3163 3164 /* 3165 * size must match sector size in bytes 3166 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3167 * is defined as number of 512 byte blocks to be transferred. 3168 */ 3169 3170 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3171 if (size != len) 3172 goto invalid_param_len; 3173 3174 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3175 /* Newer devices support queued TRIM commands */ 3176 tf->protocol = ATA_PROT_NCQ; 3177 tf->command = ATA_CMD_FPDMA_SEND; 3178 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3179 tf->nsect = qc->hw_tag << 3; 3180 tf->hob_feature = (size / 512) >> 8; 3181 tf->feature = size / 512; 3182 3183 tf->auxiliary = 1; 3184 } else { 3185 tf->protocol = ATA_PROT_DMA; 3186 tf->hob_feature = 0; 3187 tf->feature = ATA_DSM_TRIM; 3188 tf->hob_nsect = (size / 512) >> 8; 3189 tf->nsect = size / 512; 3190 tf->command = ATA_CMD_DSM; 3191 } 3192 3193 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3194 ATA_TFLAG_WRITE; 3195 3196 ata_qc_set_pc_nbytes(qc); 3197 3198 return 0; 3199 3200 invalid_fld: 3201 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3202 return 1; 3203 invalid_param_len: 3204 /* "Parameter list length error" */ 3205 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3206 return 1; 3207 invalid_opcode: 3208 /* "Invalid command operation code" */ 3209 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3210 return 1; 3211 } 3212 3213 /** 3214 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3215 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3216 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3217 * 3218 * Yields a subset to satisfy scsi_report_opcode() 3219 * 3220 * LOCKING: 3221 * spin_lock_irqsave(host lock) 3222 */ 3223 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3224 { 3225 struct ata_device *dev = args->dev; 3226 u8 *cdb = args->cmd->cmnd; 3227 u8 supported = 0; 3228 unsigned int err = 0; 3229 3230 if (cdb[2] != 1) { 3231 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3232 err = 2; 3233 goto out; 3234 } 3235 switch (cdb[3]) { 3236 case INQUIRY: 3237 case MODE_SENSE: 3238 case MODE_SENSE_10: 3239 case READ_CAPACITY: 3240 case SERVICE_ACTION_IN_16: 3241 case REPORT_LUNS: 3242 case REQUEST_SENSE: 3243 case SYNCHRONIZE_CACHE: 3244 case REZERO_UNIT: 3245 case SEEK_6: 3246 case SEEK_10: 3247 case TEST_UNIT_READY: 3248 case SEND_DIAGNOSTIC: 3249 case MAINTENANCE_IN: 3250 case READ_6: 3251 case READ_10: 3252 case READ_16: 3253 case WRITE_6: 3254 case WRITE_10: 3255 case WRITE_16: 3256 case ATA_12: 3257 case ATA_16: 3258 case VERIFY: 3259 case VERIFY_16: 3260 case MODE_SELECT: 3261 case MODE_SELECT_10: 3262 case START_STOP: 3263 supported = 3; 3264 break; 3265 case ZBC_IN: 3266 case ZBC_OUT: 3267 if (ata_id_zoned_cap(dev->id) || 3268 dev->class == ATA_DEV_ZAC) 3269 supported = 3; 3270 break; 3271 case SECURITY_PROTOCOL_IN: 3272 case SECURITY_PROTOCOL_OUT: 3273 if (dev->flags & ATA_DFLAG_TRUSTED) 3274 supported = 3; 3275 break; 3276 default: 3277 break; 3278 } 3279 out: 3280 rbuf[1] = supported; /* supported */ 3281 return err; 3282 } 3283 3284 /** 3285 * ata_scsi_report_zones_complete - convert ATA output 3286 * @qc: command structure returning the data 3287 * 3288 * Convert T-13 little-endian field representation into 3289 * T-10 big-endian field representation. 3290 * What a mess. 3291 */ 3292 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3293 { 3294 struct scsi_cmnd *scmd = qc->scsicmd; 3295 struct sg_mapping_iter miter; 3296 unsigned long flags; 3297 unsigned int bytes = 0; 3298 3299 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3300 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3301 3302 local_irq_save(flags); 3303 while (sg_miter_next(&miter)) { 3304 unsigned int offset = 0; 3305 3306 if (bytes == 0) { 3307 char *hdr; 3308 u32 list_length; 3309 u64 max_lba, opt_lba; 3310 u16 same; 3311 3312 /* Swizzle header */ 3313 hdr = miter.addr; 3314 list_length = get_unaligned_le32(&hdr[0]); 3315 same = get_unaligned_le16(&hdr[4]); 3316 max_lba = get_unaligned_le64(&hdr[8]); 3317 opt_lba = get_unaligned_le64(&hdr[16]); 3318 put_unaligned_be32(list_length, &hdr[0]); 3319 hdr[4] = same & 0xf; 3320 put_unaligned_be64(max_lba, &hdr[8]); 3321 put_unaligned_be64(opt_lba, &hdr[16]); 3322 offset += 64; 3323 bytes += 64; 3324 } 3325 while (offset < miter.length) { 3326 char *rec; 3327 u8 cond, type, non_seq, reset; 3328 u64 size, start, wp; 3329 3330 /* Swizzle zone descriptor */ 3331 rec = miter.addr + offset; 3332 type = rec[0] & 0xf; 3333 cond = (rec[1] >> 4) & 0xf; 3334 non_seq = (rec[1] & 2); 3335 reset = (rec[1] & 1); 3336 size = get_unaligned_le64(&rec[8]); 3337 start = get_unaligned_le64(&rec[16]); 3338 wp = get_unaligned_le64(&rec[24]); 3339 rec[0] = type; 3340 rec[1] = (cond << 4) | non_seq | reset; 3341 put_unaligned_be64(size, &rec[8]); 3342 put_unaligned_be64(start, &rec[16]); 3343 put_unaligned_be64(wp, &rec[24]); 3344 WARN_ON(offset + 64 > miter.length); 3345 offset += 64; 3346 bytes += 64; 3347 } 3348 } 3349 sg_miter_stop(&miter); 3350 local_irq_restore(flags); 3351 3352 ata_scsi_qc_complete(qc); 3353 } 3354 3355 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3356 { 3357 struct ata_taskfile *tf = &qc->tf; 3358 struct scsi_cmnd *scmd = qc->scsicmd; 3359 const u8 *cdb = scmd->cmnd; 3360 u16 sect, fp = (u16)-1; 3361 u8 sa, options, bp = 0xff; 3362 u64 block; 3363 u32 n_block; 3364 3365 if (unlikely(scmd->cmd_len < 16)) { 3366 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3367 scmd->cmd_len); 3368 fp = 15; 3369 goto invalid_fld; 3370 } 3371 scsi_16_lba_len(cdb, &block, &n_block); 3372 if (n_block != scsi_bufflen(scmd)) { 3373 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3374 n_block, scsi_bufflen(scmd)); 3375 goto invalid_param_len; 3376 } 3377 sa = cdb[1] & 0x1f; 3378 if (sa != ZI_REPORT_ZONES) { 3379 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3380 fp = 1; 3381 goto invalid_fld; 3382 } 3383 /* 3384 * ZAC allows only for transfers in 512 byte blocks, 3385 * and uses a 16 bit value for the transfer count. 3386 */ 3387 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3388 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3389 goto invalid_param_len; 3390 } 3391 sect = n_block / 512; 3392 options = cdb[14] & 0xbf; 3393 3394 if (ata_ncq_enabled(qc->dev) && 3395 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3396 tf->protocol = ATA_PROT_NCQ; 3397 tf->command = ATA_CMD_FPDMA_RECV; 3398 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3399 tf->nsect = qc->hw_tag << 3; 3400 tf->feature = sect & 0xff; 3401 tf->hob_feature = (sect >> 8) & 0xff; 3402 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3403 } else { 3404 tf->command = ATA_CMD_ZAC_MGMT_IN; 3405 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3406 tf->protocol = ATA_PROT_DMA; 3407 tf->hob_feature = options; 3408 tf->hob_nsect = (sect >> 8) & 0xff; 3409 tf->nsect = sect & 0xff; 3410 } 3411 tf->device = ATA_LBA; 3412 tf->lbah = (block >> 16) & 0xff; 3413 tf->lbam = (block >> 8) & 0xff; 3414 tf->lbal = block & 0xff; 3415 tf->hob_lbah = (block >> 40) & 0xff; 3416 tf->hob_lbam = (block >> 32) & 0xff; 3417 tf->hob_lbal = (block >> 24) & 0xff; 3418 3419 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3420 qc->flags |= ATA_QCFLAG_RESULT_TF; 3421 3422 ata_qc_set_pc_nbytes(qc); 3423 3424 qc->complete_fn = ata_scsi_report_zones_complete; 3425 3426 return 0; 3427 3428 invalid_fld: 3429 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3430 return 1; 3431 3432 invalid_param_len: 3433 /* "Parameter list length error" */ 3434 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3435 return 1; 3436 } 3437 3438 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3439 { 3440 struct ata_taskfile *tf = &qc->tf; 3441 struct scsi_cmnd *scmd = qc->scsicmd; 3442 struct ata_device *dev = qc->dev; 3443 const u8 *cdb = scmd->cmnd; 3444 u8 all, sa; 3445 u64 block; 3446 u32 n_block; 3447 u16 fp = (u16)-1; 3448 3449 if (unlikely(scmd->cmd_len < 16)) { 3450 fp = 15; 3451 goto invalid_fld; 3452 } 3453 3454 sa = cdb[1] & 0x1f; 3455 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3456 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3457 fp = 1; 3458 goto invalid_fld; 3459 } 3460 3461 scsi_16_lba_len(cdb, &block, &n_block); 3462 if (n_block) { 3463 /* 3464 * ZAC MANAGEMENT OUT doesn't define any length 3465 */ 3466 goto invalid_param_len; 3467 } 3468 3469 all = cdb[14] & 0x1; 3470 if (all) { 3471 /* 3472 * Ignore the block address (zone ID) as defined by ZBC. 3473 */ 3474 block = 0; 3475 } else if (block >= dev->n_sectors) { 3476 /* 3477 * Block must be a valid zone ID (a zone start LBA). 3478 */ 3479 fp = 2; 3480 goto invalid_fld; 3481 } 3482 3483 if (ata_ncq_enabled(qc->dev) && 3484 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3485 tf->protocol = ATA_PROT_NCQ_NODATA; 3486 tf->command = ATA_CMD_NCQ_NON_DATA; 3487 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3488 tf->nsect = qc->hw_tag << 3; 3489 tf->auxiliary = sa | ((u16)all << 8); 3490 } else { 3491 tf->protocol = ATA_PROT_NODATA; 3492 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3493 tf->feature = sa; 3494 tf->hob_feature = all; 3495 } 3496 tf->lbah = (block >> 16) & 0xff; 3497 tf->lbam = (block >> 8) & 0xff; 3498 tf->lbal = block & 0xff; 3499 tf->hob_lbah = (block >> 40) & 0xff; 3500 tf->hob_lbam = (block >> 32) & 0xff; 3501 tf->hob_lbal = (block >> 24) & 0xff; 3502 tf->device = ATA_LBA; 3503 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3504 3505 return 0; 3506 3507 invalid_fld: 3508 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3509 return 1; 3510 invalid_param_len: 3511 /* "Parameter list length error" */ 3512 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3513 return 1; 3514 } 3515 3516 /** 3517 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3518 * @qc: Storage for translated ATA taskfile 3519 * @buf: input buffer 3520 * @len: number of valid bytes in the input buffer 3521 * @fp: out parameter for the failed field on error 3522 * 3523 * Prepare a taskfile to modify caching information for the device. 3524 * 3525 * LOCKING: 3526 * None. 3527 */ 3528 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3529 const u8 *buf, int len, u16 *fp) 3530 { 3531 struct ata_taskfile *tf = &qc->tf; 3532 struct ata_device *dev = qc->dev; 3533 u8 mpage[CACHE_MPAGE_LEN]; 3534 u8 wce; 3535 int i; 3536 3537 /* 3538 * The first two bytes of def_cache_mpage are a header, so offsets 3539 * in mpage are off by 2 compared to buf. Same for len. 3540 */ 3541 3542 if (len != CACHE_MPAGE_LEN - 2) { 3543 *fp = min(len, CACHE_MPAGE_LEN - 2); 3544 return -EINVAL; 3545 } 3546 3547 wce = buf[0] & (1 << 2); 3548 3549 /* 3550 * Check that read-only bits are not modified. 3551 */ 3552 ata_msense_caching(dev->id, mpage, false); 3553 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3554 if (i == 0) 3555 continue; 3556 if (mpage[i + 2] != buf[i]) { 3557 *fp = i; 3558 return -EINVAL; 3559 } 3560 } 3561 3562 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3563 tf->protocol = ATA_PROT_NODATA; 3564 tf->nsect = 0; 3565 tf->command = ATA_CMD_SET_FEATURES; 3566 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3567 return 0; 3568 } 3569 3570 /** 3571 * ata_mselect_control - Simulate MODE SELECT for control page 3572 * @qc: Storage for translated ATA taskfile 3573 * @buf: input buffer 3574 * @len: number of valid bytes in the input buffer 3575 * @fp: out parameter for the failed field on error 3576 * 3577 * Prepare a taskfile to modify caching information for the device. 3578 * 3579 * LOCKING: 3580 * None. 3581 */ 3582 static int ata_mselect_control(struct ata_queued_cmd *qc, 3583 const u8 *buf, int len, u16 *fp) 3584 { 3585 struct ata_device *dev = qc->dev; 3586 u8 mpage[CONTROL_MPAGE_LEN]; 3587 u8 d_sense; 3588 int i; 3589 3590 /* 3591 * The first two bytes of def_control_mpage are a header, so offsets 3592 * in mpage are off by 2 compared to buf. Same for len. 3593 */ 3594 3595 if (len != CONTROL_MPAGE_LEN - 2) { 3596 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3597 return -EINVAL; 3598 } 3599 3600 d_sense = buf[0] & (1 << 2); 3601 3602 /* 3603 * Check that read-only bits are not modified. 3604 */ 3605 ata_msense_control(dev, mpage, false); 3606 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3607 if (i == 0) 3608 continue; 3609 if (mpage[2 + i] != buf[i]) { 3610 *fp = i; 3611 return -EINVAL; 3612 } 3613 } 3614 if (d_sense & (1 << 2)) 3615 dev->flags |= ATA_DFLAG_D_SENSE; 3616 else 3617 dev->flags &= ~ATA_DFLAG_D_SENSE; 3618 return 0; 3619 } 3620 3621 /** 3622 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3623 * @qc: Storage for translated ATA taskfile 3624 * 3625 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3626 * Assume this is invoked for direct access devices (e.g. disks) only. 3627 * There should be no block descriptor for other device types. 3628 * 3629 * LOCKING: 3630 * spin_lock_irqsave(host lock) 3631 */ 3632 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3633 { 3634 struct scsi_cmnd *scmd = qc->scsicmd; 3635 const u8 *cdb = scmd->cmnd; 3636 u8 pg, spg; 3637 unsigned six_byte, pg_len, hdr_len, bd_len; 3638 int len; 3639 u16 fp = (u16)-1; 3640 u8 bp = 0xff; 3641 u8 buffer[64]; 3642 const u8 *p = buffer; 3643 3644 six_byte = (cdb[0] == MODE_SELECT); 3645 if (six_byte) { 3646 if (scmd->cmd_len < 5) { 3647 fp = 4; 3648 goto invalid_fld; 3649 } 3650 3651 len = cdb[4]; 3652 hdr_len = 4; 3653 } else { 3654 if (scmd->cmd_len < 9) { 3655 fp = 8; 3656 goto invalid_fld; 3657 } 3658 3659 len = get_unaligned_be16(&cdb[7]); 3660 hdr_len = 8; 3661 } 3662 3663 /* We only support PF=1, SP=0. */ 3664 if ((cdb[1] & 0x11) != 0x10) { 3665 fp = 1; 3666 bp = (cdb[1] & 0x01) ? 1 : 5; 3667 goto invalid_fld; 3668 } 3669 3670 /* Test early for possible overrun. */ 3671 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3672 goto invalid_param_len; 3673 3674 /* Move past header and block descriptors. */ 3675 if (len < hdr_len) 3676 goto invalid_param_len; 3677 3678 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3679 buffer, sizeof(buffer))) 3680 goto invalid_param_len; 3681 3682 if (six_byte) 3683 bd_len = p[3]; 3684 else 3685 bd_len = get_unaligned_be16(&p[6]); 3686 3687 len -= hdr_len; 3688 p += hdr_len; 3689 if (len < bd_len) 3690 goto invalid_param_len; 3691 if (bd_len != 0 && bd_len != 8) { 3692 fp = (six_byte) ? 3 : 6; 3693 fp += bd_len + hdr_len; 3694 goto invalid_param; 3695 } 3696 3697 len -= bd_len; 3698 p += bd_len; 3699 if (len == 0) 3700 goto skip; 3701 3702 /* Parse both possible formats for the mode page headers. */ 3703 pg = p[0] & 0x3f; 3704 if (p[0] & 0x40) { 3705 if (len < 4) 3706 goto invalid_param_len; 3707 3708 spg = p[1]; 3709 pg_len = get_unaligned_be16(&p[2]); 3710 p += 4; 3711 len -= 4; 3712 } else { 3713 if (len < 2) 3714 goto invalid_param_len; 3715 3716 spg = 0; 3717 pg_len = p[1]; 3718 p += 2; 3719 len -= 2; 3720 } 3721 3722 /* 3723 * No mode subpages supported (yet) but asking for _all_ 3724 * subpages may be valid 3725 */ 3726 if (spg && (spg != ALL_SUB_MPAGES)) { 3727 fp = (p[0] & 0x40) ? 1 : 0; 3728 fp += hdr_len + bd_len; 3729 goto invalid_param; 3730 } 3731 if (pg_len > len) 3732 goto invalid_param_len; 3733 3734 switch (pg) { 3735 case CACHE_MPAGE: 3736 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3737 fp += hdr_len + bd_len; 3738 goto invalid_param; 3739 } 3740 break; 3741 case CONTROL_MPAGE: 3742 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 3743 fp += hdr_len + bd_len; 3744 goto invalid_param; 3745 } else { 3746 goto skip; /* No ATA command to send */ 3747 } 3748 break; 3749 default: /* invalid page code */ 3750 fp = bd_len + hdr_len; 3751 goto invalid_param; 3752 } 3753 3754 /* 3755 * Only one page has changeable data, so we only support setting one 3756 * page at a time. 3757 */ 3758 if (len > pg_len) 3759 goto invalid_param; 3760 3761 return 0; 3762 3763 invalid_fld: 3764 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3765 return 1; 3766 3767 invalid_param: 3768 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3769 return 1; 3770 3771 invalid_param_len: 3772 /* "Parameter list length error" */ 3773 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3774 return 1; 3775 3776 skip: 3777 scmd->result = SAM_STAT_GOOD; 3778 return 1; 3779 } 3780 3781 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3782 { 3783 if (len == 0) 3784 return ATA_CMD_TRUSTED_NONDATA; 3785 else if (send) 3786 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 3787 else 3788 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 3789 } 3790 3791 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 3792 { 3793 struct scsi_cmnd *scmd = qc->scsicmd; 3794 const u8 *cdb = scmd->cmnd; 3795 struct ata_taskfile *tf = &qc->tf; 3796 u8 secp = cdb[1]; 3797 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 3798 u16 spsp = get_unaligned_be16(&cdb[2]); 3799 u32 len = get_unaligned_be32(&cdb[6]); 3800 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 3801 3802 /* 3803 * We don't support the ATA "security" protocol. 3804 */ 3805 if (secp == 0xef) { 3806 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 3807 return 1; 3808 } 3809 3810 if (cdb[4] & 7) { /* INC_512 */ 3811 if (len > 0xffff) { 3812 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3813 return 1; 3814 } 3815 } else { 3816 if (len > 0x01fffe00) { 3817 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3818 return 1; 3819 } 3820 3821 /* convert to the sector-based ATA addressing */ 3822 len = (len + 511) / 512; 3823 } 3824 3825 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 3826 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 3827 if (send) 3828 tf->flags |= ATA_TFLAG_WRITE; 3829 tf->command = ata_scsi_trusted_op(len, send, dma); 3830 tf->feature = secp; 3831 tf->lbam = spsp & 0xff; 3832 tf->lbah = spsp >> 8; 3833 3834 if (len) { 3835 tf->nsect = len & 0xff; 3836 tf->lbal = len >> 8; 3837 } else { 3838 if (!send) 3839 tf->lbah = (1 << 7); 3840 } 3841 3842 ata_qc_set_pc_nbytes(qc); 3843 return 0; 3844 } 3845 3846 /** 3847 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 3848 * @qc: Command to be translated 3849 * 3850 * Translate a SCSI variable length CDB to specified commands. 3851 * It checks a service action value in CDB to call corresponding handler. 3852 * 3853 * RETURNS: 3854 * Zero on success, non-zero on failure 3855 * 3856 */ 3857 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 3858 { 3859 struct scsi_cmnd *scmd = qc->scsicmd; 3860 const u8 *cdb = scmd->cmnd; 3861 const u16 sa = get_unaligned_be16(&cdb[8]); 3862 3863 /* 3864 * if service action represents a ata pass-thru(32) command, 3865 * then pass it to ata_scsi_pass_thru handler. 3866 */ 3867 if (sa == ATA_32) 3868 return ata_scsi_pass_thru(qc); 3869 3870 /* unsupported service action */ 3871 return 1; 3872 } 3873 3874 /** 3875 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3876 * @dev: ATA device 3877 * @cmd: SCSI command opcode to consider 3878 * 3879 * Look up the SCSI command given, and determine whether the 3880 * SCSI command is to be translated or simulated. 3881 * 3882 * RETURNS: 3883 * Pointer to translation function if possible, %NULL if not. 3884 */ 3885 3886 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3887 { 3888 switch (cmd) { 3889 case READ_6: 3890 case READ_10: 3891 case READ_16: 3892 3893 case WRITE_6: 3894 case WRITE_10: 3895 case WRITE_16: 3896 return ata_scsi_rw_xlat; 3897 3898 case WRITE_SAME_16: 3899 return ata_scsi_write_same_xlat; 3900 3901 case SYNCHRONIZE_CACHE: 3902 if (ata_try_flush_cache(dev)) 3903 return ata_scsi_flush_xlat; 3904 break; 3905 3906 case VERIFY: 3907 case VERIFY_16: 3908 return ata_scsi_verify_xlat; 3909 3910 case ATA_12: 3911 case ATA_16: 3912 return ata_scsi_pass_thru; 3913 3914 case VARIABLE_LENGTH_CMD: 3915 return ata_scsi_var_len_cdb_xlat; 3916 3917 case MODE_SELECT: 3918 case MODE_SELECT_10: 3919 return ata_scsi_mode_select_xlat; 3920 3921 case ZBC_IN: 3922 return ata_scsi_zbc_in_xlat; 3923 3924 case ZBC_OUT: 3925 return ata_scsi_zbc_out_xlat; 3926 3927 case SECURITY_PROTOCOL_IN: 3928 case SECURITY_PROTOCOL_OUT: 3929 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 3930 break; 3931 return ata_scsi_security_inout_xlat; 3932 3933 case START_STOP: 3934 return ata_scsi_start_stop_xlat; 3935 } 3936 3937 return NULL; 3938 } 3939 3940 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 3941 { 3942 u8 scsi_op = scmd->cmnd[0]; 3943 ata_xlat_func_t xlat_func; 3944 3945 if (unlikely(!scmd->cmd_len)) 3946 goto bad_cdb_len; 3947 3948 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 3949 if (unlikely(scmd->cmd_len > dev->cdb_len)) 3950 goto bad_cdb_len; 3951 3952 xlat_func = ata_get_xlat_func(dev, scsi_op); 3953 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3954 /* relay SCSI command to ATAPI device */ 3955 int len = COMMAND_SIZE(scsi_op); 3956 3957 if (unlikely(len > scmd->cmd_len || 3958 len > dev->cdb_len || 3959 scmd->cmd_len > ATAPI_CDB_LEN)) 3960 goto bad_cdb_len; 3961 3962 xlat_func = atapi_xlat; 3963 } else { 3964 /* ATA_16 passthru, treat as an ATA command */ 3965 if (unlikely(scmd->cmd_len > 16)) 3966 goto bad_cdb_len; 3967 3968 xlat_func = ata_get_xlat_func(dev, scsi_op); 3969 } 3970 3971 if (xlat_func) 3972 return ata_scsi_translate(dev, scmd, xlat_func); 3973 3974 ata_scsi_simulate(dev, scmd); 3975 3976 return 0; 3977 3978 bad_cdb_len: 3979 scmd->result = DID_ERROR << 16; 3980 scsi_done(scmd); 3981 return 0; 3982 } 3983 3984 /** 3985 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 3986 * @shost: SCSI host of command to be sent 3987 * @cmd: SCSI command to be sent 3988 * 3989 * In some cases, this function translates SCSI commands into 3990 * ATA taskfiles, and queues the taskfiles to be sent to 3991 * hardware. In other cases, this function simulates a 3992 * SCSI device by evaluating and responding to certain 3993 * SCSI commands. This creates the overall effect of 3994 * ATA and ATAPI devices appearing as SCSI devices. 3995 * 3996 * LOCKING: 3997 * ATA host lock 3998 * 3999 * RETURNS: 4000 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4001 * 0 otherwise. 4002 */ 4003 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4004 { 4005 struct ata_port *ap; 4006 struct ata_device *dev; 4007 struct scsi_device *scsidev = cmd->device; 4008 int rc = 0; 4009 unsigned long irq_flags; 4010 4011 ap = ata_shost_to_port(shost); 4012 4013 spin_lock_irqsave(ap->lock, irq_flags); 4014 4015 dev = ata_scsi_find_dev(ap, scsidev); 4016 if (likely(dev)) 4017 rc = __ata_scsi_queuecmd(cmd, dev); 4018 else { 4019 cmd->result = (DID_BAD_TARGET << 16); 4020 scsi_done(cmd); 4021 } 4022 4023 spin_unlock_irqrestore(ap->lock, irq_flags); 4024 4025 return rc; 4026 } 4027 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4028 4029 /** 4030 * ata_scsi_simulate - simulate SCSI command on ATA device 4031 * @dev: the target device 4032 * @cmd: SCSI command being sent to device. 4033 * 4034 * Interprets and directly executes a select list of SCSI commands 4035 * that can be handled internally. 4036 * 4037 * LOCKING: 4038 * spin_lock_irqsave(host lock) 4039 */ 4040 4041 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4042 { 4043 struct ata_scsi_args args; 4044 const u8 *scsicmd = cmd->cmnd; 4045 u8 tmp8; 4046 4047 args.dev = dev; 4048 args.id = dev->id; 4049 args.cmd = cmd; 4050 4051 switch(scsicmd[0]) { 4052 case INQUIRY: 4053 if (scsicmd[1] & 2) /* is CmdDt set? */ 4054 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4055 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4056 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4057 else switch (scsicmd[2]) { 4058 case 0x00: 4059 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4060 break; 4061 case 0x80: 4062 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4063 break; 4064 case 0x83: 4065 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4066 break; 4067 case 0x89: 4068 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4069 break; 4070 case 0xb0: 4071 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4072 break; 4073 case 0xb1: 4074 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4075 break; 4076 case 0xb2: 4077 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4078 break; 4079 case 0xb6: 4080 if (dev->flags & ATA_DFLAG_ZAC) 4081 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4082 else 4083 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4084 break; 4085 case 0xb9: 4086 if (dev->cpr_log) 4087 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4088 else 4089 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4090 break; 4091 default: 4092 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4093 break; 4094 } 4095 break; 4096 4097 case MODE_SENSE: 4098 case MODE_SENSE_10: 4099 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4100 break; 4101 4102 case READ_CAPACITY: 4103 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4104 break; 4105 4106 case SERVICE_ACTION_IN_16: 4107 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4108 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4109 else 4110 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4111 break; 4112 4113 case REPORT_LUNS: 4114 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4115 break; 4116 4117 case REQUEST_SENSE: 4118 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4119 break; 4120 4121 /* if we reach this, then writeback caching is disabled, 4122 * turning this into a no-op. 4123 */ 4124 case SYNCHRONIZE_CACHE: 4125 fallthrough; 4126 4127 /* no-op's, complete with success */ 4128 case REZERO_UNIT: 4129 case SEEK_6: 4130 case SEEK_10: 4131 case TEST_UNIT_READY: 4132 break; 4133 4134 case SEND_DIAGNOSTIC: 4135 tmp8 = scsicmd[1] & ~(1 << 3); 4136 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4137 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4138 break; 4139 4140 case MAINTENANCE_IN: 4141 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4142 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4143 else 4144 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4145 break; 4146 4147 /* all other commands */ 4148 default: 4149 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4150 /* "Invalid command operation code" */ 4151 break; 4152 } 4153 4154 scsi_done(cmd); 4155 } 4156 4157 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4158 { 4159 int i, rc; 4160 4161 for (i = 0; i < host->n_ports; i++) { 4162 struct ata_port *ap = host->ports[i]; 4163 struct Scsi_Host *shost; 4164 4165 rc = -ENOMEM; 4166 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4167 if (!shost) 4168 goto err_alloc; 4169 4170 shost->eh_noresume = 1; 4171 *(struct ata_port **)&shost->hostdata[0] = ap; 4172 ap->scsi_host = shost; 4173 4174 shost->transportt = ata_scsi_transport_template; 4175 shost->unique_id = ap->print_id; 4176 shost->max_id = 16; 4177 shost->max_lun = 1; 4178 shost->max_channel = 1; 4179 shost->max_cmd_len = 32; 4180 4181 /* Schedule policy is determined by ->qc_defer() 4182 * callback and it needs to see every deferred qc. 4183 * Set host_blocked to 1 to prevent SCSI midlayer from 4184 * automatically deferring requests. 4185 */ 4186 shost->max_host_blocked = 1; 4187 4188 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4189 if (rc) 4190 goto err_alloc; 4191 } 4192 4193 return 0; 4194 4195 err_alloc: 4196 while (--i >= 0) { 4197 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4198 4199 /* scsi_host_put() is in ata_devres_release() */ 4200 scsi_remove_host(shost); 4201 } 4202 return rc; 4203 } 4204 4205 #ifdef CONFIG_OF 4206 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4207 { 4208 struct scsi_device *sdev = dev->sdev; 4209 struct device *d = ap->host->dev; 4210 struct device_node *np = d->of_node; 4211 struct device_node *child; 4212 4213 for_each_available_child_of_node(np, child) { 4214 int ret; 4215 u32 val; 4216 4217 ret = of_property_read_u32(child, "reg", &val); 4218 if (ret) 4219 continue; 4220 if (val == dev->devno) { 4221 dev_dbg(d, "found matching device node\n"); 4222 sdev->sdev_gendev.of_node = child; 4223 return; 4224 } 4225 } 4226 } 4227 #else 4228 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4229 { 4230 } 4231 #endif 4232 4233 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4234 { 4235 int tries = 5; 4236 struct ata_device *last_failed_dev = NULL; 4237 struct ata_link *link; 4238 struct ata_device *dev; 4239 4240 repeat: 4241 ata_for_each_link(link, ap, EDGE) { 4242 ata_for_each_dev(dev, link, ENABLED) { 4243 struct scsi_device *sdev; 4244 int channel = 0, id = 0; 4245 4246 if (dev->sdev) 4247 continue; 4248 4249 if (ata_is_host_link(link)) 4250 id = dev->devno; 4251 else 4252 channel = link->pmp; 4253 4254 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4255 NULL); 4256 if (!IS_ERR(sdev)) { 4257 dev->sdev = sdev; 4258 ata_scsi_assign_ofnode(dev, ap); 4259 scsi_device_put(sdev); 4260 } else { 4261 dev->sdev = NULL; 4262 } 4263 } 4264 } 4265 4266 /* If we scanned while EH was in progress or allocation 4267 * failure occurred, scan would have failed silently. Check 4268 * whether all devices are attached. 4269 */ 4270 ata_for_each_link(link, ap, EDGE) { 4271 ata_for_each_dev(dev, link, ENABLED) { 4272 if (!dev->sdev) 4273 goto exit_loop; 4274 } 4275 } 4276 exit_loop: 4277 if (!link) 4278 return; 4279 4280 /* we're missing some SCSI devices */ 4281 if (sync) { 4282 /* If caller requested synchrnous scan && we've made 4283 * any progress, sleep briefly and repeat. 4284 */ 4285 if (dev != last_failed_dev) { 4286 msleep(100); 4287 last_failed_dev = dev; 4288 goto repeat; 4289 } 4290 4291 /* We might be failing to detect boot device, give it 4292 * a few more chances. 4293 */ 4294 if (--tries) { 4295 msleep(100); 4296 goto repeat; 4297 } 4298 4299 ata_port_err(ap, 4300 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4301 } 4302 4303 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4304 round_jiffies_relative(HZ)); 4305 } 4306 4307 /** 4308 * ata_scsi_offline_dev - offline attached SCSI device 4309 * @dev: ATA device to offline attached SCSI device for 4310 * 4311 * This function is called from ata_eh_hotplug() and responsible 4312 * for taking the SCSI device attached to @dev offline. This 4313 * function is called with host lock which protects dev->sdev 4314 * against clearing. 4315 * 4316 * LOCKING: 4317 * spin_lock_irqsave(host lock) 4318 * 4319 * RETURNS: 4320 * 1 if attached SCSI device exists, 0 otherwise. 4321 */ 4322 int ata_scsi_offline_dev(struct ata_device *dev) 4323 { 4324 if (dev->sdev) { 4325 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4326 return 1; 4327 } 4328 return 0; 4329 } 4330 4331 /** 4332 * ata_scsi_remove_dev - remove attached SCSI device 4333 * @dev: ATA device to remove attached SCSI device for 4334 * 4335 * This function is called from ata_eh_scsi_hotplug() and 4336 * responsible for removing the SCSI device attached to @dev. 4337 * 4338 * LOCKING: 4339 * Kernel thread context (may sleep). 4340 */ 4341 static void ata_scsi_remove_dev(struct ata_device *dev) 4342 { 4343 struct ata_port *ap = dev->link->ap; 4344 struct scsi_device *sdev; 4345 unsigned long flags; 4346 4347 /* Alas, we need to grab scan_mutex to ensure SCSI device 4348 * state doesn't change underneath us and thus 4349 * scsi_device_get() always succeeds. The mutex locking can 4350 * be removed if there is __scsi_device_get() interface which 4351 * increments reference counts regardless of device state. 4352 */ 4353 mutex_lock(&ap->scsi_host->scan_mutex); 4354 spin_lock_irqsave(ap->lock, flags); 4355 4356 /* clearing dev->sdev is protected by host lock */ 4357 sdev = dev->sdev; 4358 dev->sdev = NULL; 4359 4360 if (sdev) { 4361 /* If user initiated unplug races with us, sdev can go 4362 * away underneath us after the host lock and 4363 * scan_mutex are released. Hold onto it. 4364 */ 4365 if (scsi_device_get(sdev) == 0) { 4366 /* The following ensures the attached sdev is 4367 * offline on return from ata_scsi_offline_dev() 4368 * regardless it wins or loses the race 4369 * against this function. 4370 */ 4371 scsi_device_set_state(sdev, SDEV_OFFLINE); 4372 } else { 4373 WARN_ON(1); 4374 sdev = NULL; 4375 } 4376 } 4377 4378 spin_unlock_irqrestore(ap->lock, flags); 4379 mutex_unlock(&ap->scsi_host->scan_mutex); 4380 4381 if (sdev) { 4382 ata_dev_info(dev, "detaching (SCSI %s)\n", 4383 dev_name(&sdev->sdev_gendev)); 4384 4385 scsi_remove_device(sdev); 4386 scsi_device_put(sdev); 4387 } 4388 } 4389 4390 static void ata_scsi_handle_link_detach(struct ata_link *link) 4391 { 4392 struct ata_port *ap = link->ap; 4393 struct ata_device *dev; 4394 4395 ata_for_each_dev(dev, link, ALL) { 4396 unsigned long flags; 4397 4398 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4399 continue; 4400 4401 spin_lock_irqsave(ap->lock, flags); 4402 dev->flags &= ~ATA_DFLAG_DETACHED; 4403 spin_unlock_irqrestore(ap->lock, flags); 4404 4405 if (zpodd_dev_enabled(dev)) 4406 zpodd_exit(dev); 4407 4408 ata_scsi_remove_dev(dev); 4409 } 4410 } 4411 4412 /** 4413 * ata_scsi_media_change_notify - send media change event 4414 * @dev: Pointer to the disk device with media change event 4415 * 4416 * Tell the block layer to send a media change notification 4417 * event. 4418 * 4419 * LOCKING: 4420 * spin_lock_irqsave(host lock) 4421 */ 4422 void ata_scsi_media_change_notify(struct ata_device *dev) 4423 { 4424 if (dev->sdev) 4425 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4426 GFP_ATOMIC); 4427 } 4428 4429 /** 4430 * ata_scsi_hotplug - SCSI part of hotplug 4431 * @work: Pointer to ATA port to perform SCSI hotplug on 4432 * 4433 * Perform SCSI part of hotplug. It's executed from a separate 4434 * workqueue after EH completes. This is necessary because SCSI 4435 * hot plugging requires working EH and hot unplugging is 4436 * synchronized with hot plugging with a mutex. 4437 * 4438 * LOCKING: 4439 * Kernel thread context (may sleep). 4440 */ 4441 void ata_scsi_hotplug(struct work_struct *work) 4442 { 4443 struct ata_port *ap = 4444 container_of(work, struct ata_port, hotplug_task.work); 4445 int i; 4446 4447 if (ap->pflags & ATA_PFLAG_UNLOADING) 4448 return; 4449 4450 mutex_lock(&ap->scsi_scan_mutex); 4451 4452 /* Unplug detached devices. We cannot use link iterator here 4453 * because PMP links have to be scanned even if PMP is 4454 * currently not attached. Iterate manually. 4455 */ 4456 ata_scsi_handle_link_detach(&ap->link); 4457 if (ap->pmp_link) 4458 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4459 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4460 4461 /* scan for new ones */ 4462 ata_scsi_scan_host(ap, 0); 4463 4464 mutex_unlock(&ap->scsi_scan_mutex); 4465 } 4466 4467 /** 4468 * ata_scsi_user_scan - indication for user-initiated bus scan 4469 * @shost: SCSI host to scan 4470 * @channel: Channel to scan 4471 * @id: ID to scan 4472 * @lun: LUN to scan 4473 * 4474 * This function is called when user explicitly requests bus 4475 * scan. Set probe pending flag and invoke EH. 4476 * 4477 * LOCKING: 4478 * SCSI layer (we don't care) 4479 * 4480 * RETURNS: 4481 * Zero. 4482 */ 4483 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4484 unsigned int id, u64 lun) 4485 { 4486 struct ata_port *ap = ata_shost_to_port(shost); 4487 unsigned long flags; 4488 int devno, rc = 0; 4489 4490 if (!ap->ops->error_handler) 4491 return -EOPNOTSUPP; 4492 4493 if (lun != SCAN_WILD_CARD && lun) 4494 return -EINVAL; 4495 4496 if (!sata_pmp_attached(ap)) { 4497 if (channel != SCAN_WILD_CARD && channel) 4498 return -EINVAL; 4499 devno = id; 4500 } else { 4501 if (id != SCAN_WILD_CARD && id) 4502 return -EINVAL; 4503 devno = channel; 4504 } 4505 4506 spin_lock_irqsave(ap->lock, flags); 4507 4508 if (devno == SCAN_WILD_CARD) { 4509 struct ata_link *link; 4510 4511 ata_for_each_link(link, ap, EDGE) { 4512 struct ata_eh_info *ehi = &link->eh_info; 4513 ehi->probe_mask |= ATA_ALL_DEVICES; 4514 ehi->action |= ATA_EH_RESET; 4515 } 4516 } else { 4517 struct ata_device *dev = ata_find_dev(ap, devno); 4518 4519 if (dev) { 4520 struct ata_eh_info *ehi = &dev->link->eh_info; 4521 ehi->probe_mask |= 1 << dev->devno; 4522 ehi->action |= ATA_EH_RESET; 4523 } else 4524 rc = -EINVAL; 4525 } 4526 4527 if (rc == 0) { 4528 ata_port_schedule_eh(ap); 4529 spin_unlock_irqrestore(ap->lock, flags); 4530 ata_port_wait_eh(ap); 4531 } else 4532 spin_unlock_irqrestore(ap->lock, flags); 4533 4534 return rc; 4535 } 4536 4537 /** 4538 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4539 * @work: Pointer to ATA port to perform scsi_rescan_device() 4540 * 4541 * After ATA pass thru (SAT) commands are executed successfully, 4542 * libata need to propagate the changes to SCSI layer. 4543 * 4544 * LOCKING: 4545 * Kernel thread context (may sleep). 4546 */ 4547 void ata_scsi_dev_rescan(struct work_struct *work) 4548 { 4549 struct ata_port *ap = 4550 container_of(work, struct ata_port, scsi_rescan_task); 4551 struct ata_link *link; 4552 struct ata_device *dev; 4553 unsigned long flags; 4554 4555 mutex_lock(&ap->scsi_scan_mutex); 4556 spin_lock_irqsave(ap->lock, flags); 4557 4558 ata_for_each_link(link, ap, EDGE) { 4559 ata_for_each_dev(dev, link, ENABLED) { 4560 struct scsi_device *sdev = dev->sdev; 4561 4562 if (!sdev) 4563 continue; 4564 if (scsi_device_get(sdev)) 4565 continue; 4566 4567 spin_unlock_irqrestore(ap->lock, flags); 4568 scsi_rescan_device(&(sdev->sdev_gendev)); 4569 scsi_device_put(sdev); 4570 spin_lock_irqsave(ap->lock, flags); 4571 } 4572 } 4573 4574 spin_unlock_irqrestore(ap->lock, flags); 4575 mutex_unlock(&ap->scsi_scan_mutex); 4576 } 4577