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