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 : snprintf(buf, 20, "%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 struct device_attribute *ata_common_sdev_attrs[] = { 238 &dev_attr_unload_heads, 239 NULL 240 }; 241 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); 242 243 /** 244 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 245 * @sdev: SCSI device for which BIOS geometry is to be determined 246 * @bdev: block device associated with @sdev 247 * @capacity: capacity of SCSI device 248 * @geom: location to which geometry will be output 249 * 250 * Generic bios head/sector/cylinder calculator 251 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 252 * mapping. Some situations may arise where the disk is not 253 * bootable if this is not used. 254 * 255 * LOCKING: 256 * Defined by the SCSI layer. We don't really care. 257 * 258 * RETURNS: 259 * Zero. 260 */ 261 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 262 sector_t capacity, int geom[]) 263 { 264 geom[0] = 255; 265 geom[1] = 63; 266 sector_div(capacity, 255*63); 267 geom[2] = capacity; 268 269 return 0; 270 } 271 EXPORT_SYMBOL_GPL(ata_std_bios_param); 272 273 /** 274 * ata_scsi_unlock_native_capacity - unlock native capacity 275 * @sdev: SCSI device to adjust device capacity for 276 * 277 * This function is called if a partition on @sdev extends beyond 278 * the end of the device. It requests EH to unlock HPA. 279 * 280 * LOCKING: 281 * Defined by the SCSI layer. Might sleep. 282 */ 283 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 284 { 285 struct ata_port *ap = ata_shost_to_port(sdev->host); 286 struct ata_device *dev; 287 unsigned long flags; 288 289 spin_lock_irqsave(ap->lock, flags); 290 291 dev = ata_scsi_find_dev(ap, sdev); 292 if (dev && dev->n_sectors < dev->n_native_sectors) { 293 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 294 dev->link->eh_info.action |= ATA_EH_RESET; 295 ata_port_schedule_eh(ap); 296 } 297 298 spin_unlock_irqrestore(ap->lock, flags); 299 ata_port_wait_eh(ap); 300 } 301 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 302 303 /** 304 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 305 * @ap: target port 306 * @sdev: SCSI device to get identify data for 307 * @arg: User buffer area for identify data 308 * 309 * LOCKING: 310 * Defined by the SCSI layer. We don't really care. 311 * 312 * RETURNS: 313 * Zero on success, negative errno on error. 314 */ 315 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 316 void __user *arg) 317 { 318 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 319 u16 __user *dst = arg; 320 char buf[40]; 321 322 if (!dev) 323 return -ENOMSG; 324 325 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 326 return -EFAULT; 327 328 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 329 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 330 return -EFAULT; 331 332 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 333 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 334 return -EFAULT; 335 336 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 337 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 338 return -EFAULT; 339 340 return 0; 341 } 342 343 /** 344 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 345 * @scsidev: Device to which we are issuing command 346 * @arg: User provided data for issuing command 347 * 348 * LOCKING: 349 * Defined by the SCSI layer. We don't really care. 350 * 351 * RETURNS: 352 * Zero on success, negative errno on error. 353 */ 354 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 355 { 356 int rc = 0; 357 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 358 u8 scsi_cmd[MAX_COMMAND_SIZE]; 359 u8 args[4], *argbuf = NULL; 360 int argsize = 0; 361 enum dma_data_direction data_dir; 362 struct scsi_sense_hdr sshdr; 363 int cmd_result; 364 365 if (arg == NULL) 366 return -EINVAL; 367 368 if (copy_from_user(args, arg, sizeof(args))) 369 return -EFAULT; 370 371 memset(sensebuf, 0, sizeof(sensebuf)); 372 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 373 374 if (args[3]) { 375 argsize = ATA_SECT_SIZE * args[3]; 376 argbuf = kmalloc(argsize, GFP_KERNEL); 377 if (argbuf == NULL) { 378 rc = -ENOMEM; 379 goto error; 380 } 381 382 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 383 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 384 block count in sector count field */ 385 data_dir = DMA_FROM_DEVICE; 386 } else { 387 scsi_cmd[1] = (3 << 1); /* Non-data */ 388 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 389 data_dir = DMA_NONE; 390 } 391 392 scsi_cmd[0] = ATA_16; 393 394 scsi_cmd[4] = args[2]; 395 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 396 scsi_cmd[6] = args[3]; 397 scsi_cmd[8] = args[1]; 398 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 399 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 400 } else { 401 scsi_cmd[6] = args[1]; 402 } 403 scsi_cmd[14] = args[0]; 404 405 /* Good values for timeout and retries? Values below 406 from scsi_ioctl_send_command() for default case... */ 407 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 408 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 409 410 if (cmd_result < 0) { 411 rc = cmd_result; 412 goto error; 413 } 414 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 415 u8 *desc = sensebuf + 8; 416 417 /* If we set cc then ATA pass-through will cause a 418 * check condition even if no error. Filter that. */ 419 if (scsi_status_is_check_condition(cmd_result)) { 420 if (sshdr.sense_key == RECOVERED_ERROR && 421 sshdr.asc == 0 && sshdr.ascq == 0x1d) 422 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 423 } 424 425 /* Send userspace a few ATA registers (same as drivers/ide) */ 426 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 427 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 428 args[0] = desc[13]; /* status */ 429 args[1] = desc[3]; /* error */ 430 args[2] = desc[5]; /* sector count (0:7) */ 431 if (copy_to_user(arg, args, sizeof(args))) 432 rc = -EFAULT; 433 } 434 } 435 436 437 if (cmd_result) { 438 rc = -EIO; 439 goto error; 440 } 441 442 if ((argbuf) 443 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 444 rc = -EFAULT; 445 error: 446 kfree(argbuf); 447 return rc; 448 } 449 450 /** 451 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 452 * @scsidev: Device to which we are issuing command 453 * @arg: User provided data for issuing command 454 * 455 * LOCKING: 456 * Defined by the SCSI layer. We don't really care. 457 * 458 * RETURNS: 459 * Zero on success, negative errno on error. 460 */ 461 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 462 { 463 int rc = 0; 464 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 465 u8 scsi_cmd[MAX_COMMAND_SIZE]; 466 u8 args[7]; 467 struct scsi_sense_hdr sshdr; 468 int cmd_result; 469 470 if (arg == NULL) 471 return -EINVAL; 472 473 if (copy_from_user(args, arg, sizeof(args))) 474 return -EFAULT; 475 476 memset(sensebuf, 0, sizeof(sensebuf)); 477 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 478 scsi_cmd[0] = ATA_16; 479 scsi_cmd[1] = (3 << 1); /* Non-data */ 480 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 481 scsi_cmd[4] = args[1]; 482 scsi_cmd[6] = args[2]; 483 scsi_cmd[8] = args[3]; 484 scsi_cmd[10] = args[4]; 485 scsi_cmd[12] = args[5]; 486 scsi_cmd[13] = args[6] & 0x4f; 487 scsi_cmd[14] = args[0]; 488 489 /* Good values for timeout and retries? Values below 490 from scsi_ioctl_send_command() for default case... */ 491 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 492 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 493 494 if (cmd_result < 0) { 495 rc = cmd_result; 496 goto error; 497 } 498 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 499 u8 *desc = sensebuf + 8; 500 501 /* If we set cc then ATA pass-through will cause a 502 * check condition even if no error. Filter that. */ 503 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 504 if (sshdr.sense_key == RECOVERED_ERROR && 505 sshdr.asc == 0 && sshdr.ascq == 0x1d) 506 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 507 } 508 509 /* Send userspace ATA registers */ 510 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 511 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 512 args[0] = desc[13]; /* status */ 513 args[1] = desc[3]; /* error */ 514 args[2] = desc[5]; /* sector count (0:7) */ 515 args[3] = desc[7]; /* lbal */ 516 args[4] = desc[9]; /* lbam */ 517 args[5] = desc[11]; /* lbah */ 518 args[6] = desc[12]; /* select */ 519 if (copy_to_user(arg, args, sizeof(args))) 520 rc = -EFAULT; 521 } 522 } 523 524 if (cmd_result) { 525 rc = -EIO; 526 goto error; 527 } 528 529 error: 530 return rc; 531 } 532 533 static int ata_ioc32(struct ata_port *ap) 534 { 535 if (ap->flags & ATA_FLAG_PIO_DMA) 536 return 1; 537 if (ap->pflags & ATA_PFLAG_PIO32) 538 return 1; 539 return 0; 540 } 541 542 /* 543 * This handles both native and compat commands, so anything added 544 * here must have a compatible argument, or check in_compat_syscall() 545 */ 546 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 547 unsigned int cmd, void __user *arg) 548 { 549 unsigned long val; 550 int rc = -EINVAL; 551 unsigned long flags; 552 553 switch (cmd) { 554 case HDIO_GET_32BIT: 555 spin_lock_irqsave(ap->lock, flags); 556 val = ata_ioc32(ap); 557 spin_unlock_irqrestore(ap->lock, flags); 558 #ifdef CONFIG_COMPAT 559 if (in_compat_syscall()) 560 return put_user(val, (compat_ulong_t __user *)arg); 561 #endif 562 return put_user(val, (unsigned long __user *)arg); 563 564 case HDIO_SET_32BIT: 565 val = (unsigned long) arg; 566 rc = 0; 567 spin_lock_irqsave(ap->lock, flags); 568 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 569 if (val) 570 ap->pflags |= ATA_PFLAG_PIO32; 571 else 572 ap->pflags &= ~ATA_PFLAG_PIO32; 573 } else { 574 if (val != ata_ioc32(ap)) 575 rc = -EINVAL; 576 } 577 spin_unlock_irqrestore(ap->lock, flags); 578 return rc; 579 580 case HDIO_GET_IDENTITY: 581 return ata_get_identity(ap, scsidev, arg); 582 583 case HDIO_DRIVE_CMD: 584 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 585 return -EACCES; 586 return ata_cmd_ioctl(scsidev, arg); 587 588 case HDIO_DRIVE_TASK: 589 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 590 return -EACCES; 591 return ata_task_ioctl(scsidev, arg); 592 593 default: 594 rc = -ENOTTY; 595 break; 596 } 597 598 return rc; 599 } 600 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 601 602 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 603 void __user *arg) 604 { 605 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 606 scsidev, cmd, arg); 607 } 608 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 609 610 /** 611 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 612 * @dev: ATA device to which the new command is attached 613 * @cmd: SCSI command that originated this ATA command 614 * 615 * Obtain a reference to an unused ata_queued_cmd structure, 616 * which is the basic libata structure representing a single 617 * ATA command sent to the hardware. 618 * 619 * If a command was available, fill in the SCSI-specific 620 * portions of the structure with information on the 621 * current command. 622 * 623 * LOCKING: 624 * spin_lock_irqsave(host lock) 625 * 626 * RETURNS: 627 * Command allocated, or %NULL if none available. 628 */ 629 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 630 struct scsi_cmnd *cmd) 631 { 632 struct ata_queued_cmd *qc; 633 634 qc = ata_qc_new_init(dev, scsi_cmd_to_rq(cmd)->tag); 635 if (qc) { 636 qc->scsicmd = cmd; 637 qc->scsidone = cmd->scsi_done; 638 639 qc->sg = scsi_sglist(cmd); 640 qc->n_elem = scsi_sg_count(cmd); 641 642 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 643 qc->flags |= ATA_QCFLAG_QUIET; 644 } else { 645 cmd->result = (DID_OK << 16) | SAM_STAT_TASK_SET_FULL; 646 cmd->scsi_done(cmd); 647 } 648 649 return qc; 650 } 651 652 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 653 { 654 struct scsi_cmnd *scmd = qc->scsicmd; 655 656 qc->extrabytes = scmd->extra_len; 657 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 658 } 659 660 /** 661 * ata_dump_status - user friendly display of error info 662 * @id: id of the port in question 663 * @tf: ptr to filled out taskfile 664 * 665 * Decode and dump the ATA error/status registers for the user so 666 * that they have some idea what really happened at the non 667 * make-believe layer. 668 * 669 * LOCKING: 670 * inherited from caller 671 */ 672 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 673 { 674 u8 stat = tf->command, err = tf->feature; 675 676 pr_warn("ata%u: status=0x%02x { ", id, stat); 677 if (stat & ATA_BUSY) { 678 pr_cont("Busy }\n"); /* Data is not valid in this case */ 679 } else { 680 if (stat & ATA_DRDY) pr_cont("DriveReady "); 681 if (stat & ATA_DF) pr_cont("DeviceFault "); 682 if (stat & ATA_DSC) pr_cont("SeekComplete "); 683 if (stat & ATA_DRQ) pr_cont("DataRequest "); 684 if (stat & ATA_CORR) pr_cont("CorrectedError "); 685 if (stat & ATA_SENSE) pr_cont("Sense "); 686 if (stat & ATA_ERR) pr_cont("Error "); 687 pr_cont("}\n"); 688 689 if (err) { 690 pr_warn("ata%u: error=0x%02x { ", id, err); 691 if (err & ATA_ABORTED) pr_cont("DriveStatusError "); 692 if (err & ATA_ICRC) { 693 if (err & ATA_ABORTED) 694 pr_cont("BadCRC "); 695 else pr_cont("Sector "); 696 } 697 if (err & ATA_UNC) pr_cont("UncorrectableError "); 698 if (err & ATA_IDNF) pr_cont("SectorIdNotFound "); 699 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound "); 700 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound "); 701 pr_cont("}\n"); 702 } 703 } 704 } 705 706 /** 707 * ata_to_sense_error - convert ATA error to SCSI error 708 * @id: ATA device number 709 * @drv_stat: value contained in ATA status register 710 * @drv_err: value contained in ATA error register 711 * @sk: the sense key we'll fill out 712 * @asc: the additional sense code we'll fill out 713 * @ascq: the additional sense code qualifier we'll fill out 714 * @verbose: be verbose 715 * 716 * Converts an ATA error into a SCSI error. Fill out pointers to 717 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 718 * format sense blocks. 719 * 720 * LOCKING: 721 * spin_lock_irqsave(host lock) 722 */ 723 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 724 u8 *asc, u8 *ascq, int verbose) 725 { 726 int i; 727 728 /* Based on the 3ware driver translation table */ 729 static const unsigned char sense_table[][4] = { 730 /* BBD|ECC|ID|MAR */ 731 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 732 // Device busy Aborted command 733 /* BBD|ECC|ID */ 734 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 735 // Device busy Aborted command 736 /* ECC|MC|MARK */ 737 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 738 // Device fault Hardware error 739 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 740 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 741 // Data CRC error SCSI parity error 742 /* MC|ID|ABRT|TRK0|MARK */ 743 {0x37, NOT_READY, 0x04, 0x00}, 744 // Unit offline Not ready 745 /* MCR|MARK */ 746 {0x09, NOT_READY, 0x04, 0x00}, 747 // Unrecovered disk error Not ready 748 /* Bad address mark */ 749 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 750 // Address mark not found for data field 751 /* TRK0 - Track 0 not found */ 752 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 753 // Hardware error 754 /* Abort: 0x04 is not translated here, see below */ 755 /* Media change request */ 756 {0x08, NOT_READY, 0x04, 0x00}, 757 // FIXME: faking offline 758 /* SRV/IDNF - ID not found */ 759 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 760 // Logical address out of range 761 /* MC - Media Changed */ 762 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 763 // Not ready to ready change, medium may have changed 764 /* ECC - Uncorrectable ECC error */ 765 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 766 // Unrecovered read error 767 /* BBD - block marked bad */ 768 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 769 // Block marked bad Medium error, unrecovered read error 770 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 771 }; 772 static const unsigned char stat_table[][4] = { 773 /* Must be first because BUSY means no other bits valid */ 774 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 775 // Busy, fake parity for now 776 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 777 // Device ready, unaligned write command 778 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 779 // Device fault, internal target failure 780 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 781 // Timed out in xfer, fake parity for now 782 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 783 // Recovered ECC error Medium error, recovered 784 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 785 }; 786 787 /* 788 * Is this an error we can process/parse 789 */ 790 if (drv_stat & ATA_BUSY) { 791 drv_err = 0; /* Ignore the err bits, they're invalid */ 792 } 793 794 if (drv_err) { 795 /* Look for drv_err */ 796 for (i = 0; sense_table[i][0] != 0xFF; i++) { 797 /* Look for best matches first */ 798 if ((sense_table[i][0] & drv_err) == 799 sense_table[i][0]) { 800 *sk = sense_table[i][1]; 801 *asc = sense_table[i][2]; 802 *ascq = sense_table[i][3]; 803 goto translate_done; 804 } 805 } 806 } 807 808 /* 809 * Fall back to interpreting status bits. Note that if the drv_err 810 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 811 * is not descriptive enough. 812 */ 813 for (i = 0; stat_table[i][0] != 0xFF; i++) { 814 if (stat_table[i][0] & drv_stat) { 815 *sk = stat_table[i][1]; 816 *asc = stat_table[i][2]; 817 *ascq = stat_table[i][3]; 818 goto translate_done; 819 } 820 } 821 822 /* 823 * We need a sensible error return here, which is tricky, and one 824 * that won't cause people to do things like return a disk wrongly. 825 */ 826 *sk = ABORTED_COMMAND; 827 *asc = 0x00; 828 *ascq = 0x00; 829 830 translate_done: 831 if (verbose) 832 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 833 id, drv_stat, drv_err, *sk, *asc, *ascq); 834 return; 835 } 836 837 /* 838 * ata_gen_passthru_sense - Generate check condition sense block. 839 * @qc: Command that completed. 840 * 841 * This function is specific to the ATA descriptor format sense 842 * block specified for the ATA pass through commands. Regardless 843 * of whether the command errored or not, return a sense 844 * block. Copy all controller registers into the sense 845 * block. If there was no error, we get the request from an ATA 846 * passthrough command, so we use the following sense data: 847 * sk = RECOVERED ERROR 848 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 849 * 850 * 851 * LOCKING: 852 * None. 853 */ 854 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 855 { 856 struct scsi_cmnd *cmd = qc->scsicmd; 857 struct ata_taskfile *tf = &qc->result_tf; 858 unsigned char *sb = cmd->sense_buffer; 859 unsigned char *desc = sb + 8; 860 int verbose = qc->ap->ops->error_handler == NULL; 861 u8 sense_key, asc, ascq; 862 863 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 864 865 /* 866 * Use ata_to_sense_error() to map status register bits 867 * onto sense key, asc & ascq. 868 */ 869 if (qc->err_mask || 870 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 871 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 872 &sense_key, &asc, &ascq, verbose); 873 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 874 } else { 875 /* 876 * ATA PASS-THROUGH INFORMATION AVAILABLE 877 * Always in descriptor format sense. 878 */ 879 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 880 } 881 882 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 883 u8 len; 884 885 /* descriptor format */ 886 len = sb[7]; 887 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 888 if (!desc) { 889 if (SCSI_SENSE_BUFFERSIZE < len + 14) 890 return; 891 sb[7] = len + 14; 892 desc = sb + 8 + len; 893 } 894 desc[0] = 9; 895 desc[1] = 12; 896 /* 897 * Copy registers into sense buffer. 898 */ 899 desc[2] = 0x00; 900 desc[3] = tf->feature; /* == error reg */ 901 desc[5] = tf->nsect; 902 desc[7] = tf->lbal; 903 desc[9] = tf->lbam; 904 desc[11] = tf->lbah; 905 desc[12] = tf->device; 906 desc[13] = tf->command; /* == status reg */ 907 908 /* 909 * Fill in Extend bit, and the high order bytes 910 * if applicable. 911 */ 912 if (tf->flags & ATA_TFLAG_LBA48) { 913 desc[2] |= 0x01; 914 desc[4] = tf->hob_nsect; 915 desc[6] = tf->hob_lbal; 916 desc[8] = tf->hob_lbam; 917 desc[10] = tf->hob_lbah; 918 } 919 } else { 920 /* Fixed sense format */ 921 desc[0] = tf->feature; 922 desc[1] = tf->command; /* status */ 923 desc[2] = tf->device; 924 desc[3] = tf->nsect; 925 desc[7] = 0; 926 if (tf->flags & ATA_TFLAG_LBA48) { 927 desc[8] |= 0x80; 928 if (tf->hob_nsect) 929 desc[8] |= 0x40; 930 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 931 desc[8] |= 0x20; 932 } 933 desc[9] = tf->lbal; 934 desc[10] = tf->lbam; 935 desc[11] = tf->lbah; 936 } 937 } 938 939 /** 940 * ata_gen_ata_sense - generate a SCSI fixed sense block 941 * @qc: Command that we are erroring out 942 * 943 * Generate sense block for a failed ATA command @qc. Descriptor 944 * format is used to accommodate LBA48 block address. 945 * 946 * LOCKING: 947 * None. 948 */ 949 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 950 { 951 struct ata_device *dev = qc->dev; 952 struct scsi_cmnd *cmd = qc->scsicmd; 953 struct ata_taskfile *tf = &qc->result_tf; 954 unsigned char *sb = cmd->sense_buffer; 955 int verbose = qc->ap->ops->error_handler == NULL; 956 u64 block; 957 u8 sense_key, asc, ascq; 958 959 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 960 961 if (ata_dev_disabled(dev)) { 962 /* Device disabled after error recovery */ 963 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 964 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 965 return; 966 } 967 /* Use ata_to_sense_error() to map status register bits 968 * onto sense key, asc & ascq. 969 */ 970 if (qc->err_mask || 971 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 972 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 973 &sense_key, &asc, &ascq, verbose); 974 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 975 } else { 976 /* Could not decode error */ 977 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 978 tf->command, qc->err_mask); 979 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 980 return; 981 } 982 983 block = ata_tf_read_block(&qc->result_tf, dev); 984 if (block == U64_MAX) 985 return; 986 987 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 988 } 989 990 void ata_scsi_sdev_config(struct scsi_device *sdev) 991 { 992 sdev->use_10_for_rw = 1; 993 sdev->use_10_for_ms = 1; 994 sdev->no_write_same = 1; 995 996 /* Schedule policy is determined by ->qc_defer() callback and 997 * it needs to see every deferred qc. Set dev_blocked to 1 to 998 * prevent SCSI midlayer from automatically deferring 999 * requests. 1000 */ 1001 sdev->max_device_blocked = 1; 1002 } 1003 1004 /** 1005 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1006 * @rq: request to be checked 1007 * 1008 * ATAPI commands which transfer variable length data to host 1009 * might overflow due to application error or hardware bug. This 1010 * function checks whether overflow should be drained and ignored 1011 * for @request. 1012 * 1013 * LOCKING: 1014 * None. 1015 * 1016 * RETURNS: 1017 * 1 if ; otherwise, 0. 1018 */ 1019 bool ata_scsi_dma_need_drain(struct request *rq) 1020 { 1021 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; 1022 } 1023 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1024 1025 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1026 { 1027 struct request_queue *q = sdev->request_queue; 1028 1029 if (!ata_id_has_unload(dev->id)) 1030 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1031 1032 /* configure max sectors */ 1033 blk_queue_max_hw_sectors(q, dev->max_sectors); 1034 1035 if (dev->class == ATA_DEV_ATAPI) { 1036 sdev->sector_size = ATA_SECT_SIZE; 1037 1038 /* set DMA padding */ 1039 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1040 1041 /* make room for appending the drain */ 1042 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1043 1044 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1045 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1046 if (!sdev->dma_drain_buf) { 1047 ata_dev_err(dev, "drain buffer allocation failed\n"); 1048 return -ENOMEM; 1049 } 1050 } else { 1051 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1052 sdev->manage_start_stop = 1; 1053 } 1054 1055 /* 1056 * ata_pio_sectors() expects buffer for each sector to not cross 1057 * page boundary. Enforce it by requiring buffers to be sector 1058 * aligned, which works iff sector_size is not larger than 1059 * PAGE_SIZE. ATAPI devices also need the alignment as 1060 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1061 */ 1062 if (sdev->sector_size > PAGE_SIZE) 1063 ata_dev_warn(dev, 1064 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1065 sdev->sector_size); 1066 1067 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1068 1069 if (dev->flags & ATA_DFLAG_AN) 1070 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1071 1072 if (dev->flags & ATA_DFLAG_NCQ) { 1073 int depth; 1074 1075 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1076 depth = min(ATA_MAX_QUEUE, depth); 1077 scsi_change_queue_depth(sdev, depth); 1078 } 1079 1080 if (dev->flags & ATA_DFLAG_TRUSTED) 1081 sdev->security_supported = 1; 1082 1083 dev->sdev = sdev; 1084 return 0; 1085 } 1086 1087 /** 1088 * ata_scsi_slave_config - Set SCSI device attributes 1089 * @sdev: SCSI device to examine 1090 * 1091 * This is called before we actually start reading 1092 * and writing to the device, to configure certain 1093 * SCSI mid-layer behaviors. 1094 * 1095 * LOCKING: 1096 * Defined by SCSI layer. We don't really care. 1097 */ 1098 1099 int ata_scsi_slave_config(struct scsi_device *sdev) 1100 { 1101 struct ata_port *ap = ata_shost_to_port(sdev->host); 1102 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1103 int rc = 0; 1104 1105 ata_scsi_sdev_config(sdev); 1106 1107 if (dev) 1108 rc = ata_scsi_dev_config(sdev, dev); 1109 1110 return rc; 1111 } 1112 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1113 1114 /** 1115 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1116 * @sdev: SCSI device to be destroyed 1117 * 1118 * @sdev is about to be destroyed for hot/warm unplugging. If 1119 * this unplugging was initiated by libata as indicated by NULL 1120 * dev->sdev, this function doesn't have to do anything. 1121 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1122 * Clear dev->sdev, schedule the device for ATA detach and invoke 1123 * EH. 1124 * 1125 * LOCKING: 1126 * Defined by SCSI layer. We don't really care. 1127 */ 1128 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1129 { 1130 struct ata_port *ap = ata_shost_to_port(sdev->host); 1131 unsigned long flags; 1132 struct ata_device *dev; 1133 1134 if (!ap->ops->error_handler) 1135 return; 1136 1137 spin_lock_irqsave(ap->lock, flags); 1138 dev = __ata_scsi_find_dev(ap, sdev); 1139 if (dev && dev->sdev) { 1140 /* SCSI device already in CANCEL state, no need to offline it */ 1141 dev->sdev = NULL; 1142 dev->flags |= ATA_DFLAG_DETACH; 1143 ata_port_schedule_eh(ap); 1144 } 1145 spin_unlock_irqrestore(ap->lock, flags); 1146 1147 kfree(sdev->dma_drain_buf); 1148 } 1149 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1150 1151 /** 1152 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1153 * @qc: Storage for translated ATA taskfile 1154 * 1155 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1156 * (to start). Perhaps these commands should be preceded by 1157 * CHECK POWER MODE to see what power mode the device is already in. 1158 * [See SAT revision 5 at www.t10.org] 1159 * 1160 * LOCKING: 1161 * spin_lock_irqsave(host lock) 1162 * 1163 * RETURNS: 1164 * Zero on success, non-zero on error. 1165 */ 1166 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1167 { 1168 struct scsi_cmnd *scmd = qc->scsicmd; 1169 struct ata_taskfile *tf = &qc->tf; 1170 const u8 *cdb = scmd->cmnd; 1171 u16 fp; 1172 u8 bp = 0xff; 1173 1174 if (scmd->cmd_len < 5) { 1175 fp = 4; 1176 goto invalid_fld; 1177 } 1178 1179 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1180 tf->protocol = ATA_PROT_NODATA; 1181 if (cdb[1] & 0x1) { 1182 ; /* ignore IMMED bit, violates sat-r05 */ 1183 } 1184 if (cdb[4] & 0x2) { 1185 fp = 4; 1186 bp = 1; 1187 goto invalid_fld; /* LOEJ bit set not supported */ 1188 } 1189 if (((cdb[4] >> 4) & 0xf) != 0) { 1190 fp = 4; 1191 bp = 3; 1192 goto invalid_fld; /* power conditions not supported */ 1193 } 1194 1195 if (cdb[4] & 0x1) { 1196 tf->nsect = 1; /* 1 sector, lba=0 */ 1197 1198 if (qc->dev->flags & ATA_DFLAG_LBA) { 1199 tf->flags |= ATA_TFLAG_LBA; 1200 1201 tf->lbah = 0x0; 1202 tf->lbam = 0x0; 1203 tf->lbal = 0x0; 1204 tf->device |= ATA_LBA; 1205 } else { 1206 /* CHS */ 1207 tf->lbal = 0x1; /* sect */ 1208 tf->lbam = 0x0; /* cyl low */ 1209 tf->lbah = 0x0; /* cyl high */ 1210 } 1211 1212 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1213 } else { 1214 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1215 * or S5) causing some drives to spin up and down again. 1216 */ 1217 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1218 system_state == SYSTEM_POWER_OFF) 1219 goto skip; 1220 1221 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1222 system_entering_hibernation()) 1223 goto skip; 1224 1225 /* Issue ATA STANDBY IMMEDIATE command */ 1226 tf->command = ATA_CMD_STANDBYNOW1; 1227 } 1228 1229 /* 1230 * Standby and Idle condition timers could be implemented but that 1231 * would require libata to implement the Power condition mode page 1232 * and allow the user to change it. Changing mode pages requires 1233 * MODE SELECT to be implemented. 1234 */ 1235 1236 return 0; 1237 1238 invalid_fld: 1239 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1240 return 1; 1241 skip: 1242 scmd->result = SAM_STAT_GOOD; 1243 return 1; 1244 } 1245 1246 1247 /** 1248 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1249 * @qc: Storage for translated ATA taskfile 1250 * 1251 * Sets up an ATA taskfile to issue FLUSH CACHE or 1252 * FLUSH CACHE EXT. 1253 * 1254 * LOCKING: 1255 * spin_lock_irqsave(host lock) 1256 * 1257 * RETURNS: 1258 * Zero on success, non-zero on error. 1259 */ 1260 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1261 { 1262 struct ata_taskfile *tf = &qc->tf; 1263 1264 tf->flags |= ATA_TFLAG_DEVICE; 1265 tf->protocol = ATA_PROT_NODATA; 1266 1267 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1268 tf->command = ATA_CMD_FLUSH_EXT; 1269 else 1270 tf->command = ATA_CMD_FLUSH; 1271 1272 /* flush is critical for IO integrity, consider it an IO command */ 1273 qc->flags |= ATA_QCFLAG_IO; 1274 1275 return 0; 1276 } 1277 1278 /** 1279 * scsi_6_lba_len - Get LBA and transfer length 1280 * @cdb: SCSI command to translate 1281 * 1282 * Calculate LBA and transfer length for 6-byte commands. 1283 * 1284 * RETURNS: 1285 * @plba: the LBA 1286 * @plen: the transfer length 1287 */ 1288 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1289 { 1290 u64 lba = 0; 1291 u32 len; 1292 1293 VPRINTK("six-byte command\n"); 1294 1295 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1296 lba |= ((u64)cdb[2]) << 8; 1297 lba |= ((u64)cdb[3]); 1298 1299 len = cdb[4]; 1300 1301 *plba = lba; 1302 *plen = len; 1303 } 1304 1305 /** 1306 * scsi_10_lba_len - Get LBA and transfer length 1307 * @cdb: SCSI command to translate 1308 * 1309 * Calculate LBA and transfer length for 10-byte commands. 1310 * 1311 * RETURNS: 1312 * @plba: the LBA 1313 * @plen: the transfer length 1314 */ 1315 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1316 { 1317 u64 lba = 0; 1318 u32 len = 0; 1319 1320 VPRINTK("ten-byte command\n"); 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 VPRINTK("sixteen-byte command\n"); 1350 1351 lba |= ((u64)cdb[2]) << 56; 1352 lba |= ((u64)cdb[3]) << 48; 1353 lba |= ((u64)cdb[4]) << 40; 1354 lba |= ((u64)cdb[5]) << 32; 1355 lba |= ((u64)cdb[6]) << 24; 1356 lba |= ((u64)cdb[7]) << 16; 1357 lba |= ((u64)cdb[8]) << 8; 1358 lba |= ((u64)cdb[9]); 1359 1360 len |= ((u32)cdb[10]) << 24; 1361 len |= ((u32)cdb[11]) << 16; 1362 len |= ((u32)cdb[12]) << 8; 1363 len |= ((u32)cdb[13]); 1364 1365 *plba = lba; 1366 *plen = len; 1367 } 1368 1369 /** 1370 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1371 * @qc: Storage for translated ATA taskfile 1372 * 1373 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1374 * 1375 * LOCKING: 1376 * spin_lock_irqsave(host lock) 1377 * 1378 * RETURNS: 1379 * Zero on success, non-zero on error. 1380 */ 1381 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1382 { 1383 struct scsi_cmnd *scmd = qc->scsicmd; 1384 struct ata_taskfile *tf = &qc->tf; 1385 struct ata_device *dev = qc->dev; 1386 u64 dev_sectors = qc->dev->n_sectors; 1387 const u8 *cdb = scmd->cmnd; 1388 u64 block; 1389 u32 n_block; 1390 u16 fp; 1391 1392 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1393 tf->protocol = ATA_PROT_NODATA; 1394 1395 if (cdb[0] == VERIFY) { 1396 if (scmd->cmd_len < 10) { 1397 fp = 9; 1398 goto invalid_fld; 1399 } 1400 scsi_10_lba_len(cdb, &block, &n_block); 1401 } else if (cdb[0] == VERIFY_16) { 1402 if (scmd->cmd_len < 16) { 1403 fp = 15; 1404 goto invalid_fld; 1405 } 1406 scsi_16_lba_len(cdb, &block, &n_block); 1407 } else { 1408 fp = 0; 1409 goto invalid_fld; 1410 } 1411 1412 if (!n_block) 1413 goto nothing_to_do; 1414 if (block >= dev_sectors) 1415 goto out_of_range; 1416 if ((block + n_block) > dev_sectors) 1417 goto out_of_range; 1418 1419 if (dev->flags & ATA_DFLAG_LBA) { 1420 tf->flags |= ATA_TFLAG_LBA; 1421 1422 if (lba_28_ok(block, n_block)) { 1423 /* use LBA28 */ 1424 tf->command = ATA_CMD_VERIFY; 1425 tf->device |= (block >> 24) & 0xf; 1426 } else if (lba_48_ok(block, n_block)) { 1427 if (!(dev->flags & ATA_DFLAG_LBA48)) 1428 goto out_of_range; 1429 1430 /* use LBA48 */ 1431 tf->flags |= ATA_TFLAG_LBA48; 1432 tf->command = ATA_CMD_VERIFY_EXT; 1433 1434 tf->hob_nsect = (n_block >> 8) & 0xff; 1435 1436 tf->hob_lbah = (block >> 40) & 0xff; 1437 tf->hob_lbam = (block >> 32) & 0xff; 1438 tf->hob_lbal = (block >> 24) & 0xff; 1439 } else 1440 /* request too large even for LBA48 */ 1441 goto out_of_range; 1442 1443 tf->nsect = n_block & 0xff; 1444 1445 tf->lbah = (block >> 16) & 0xff; 1446 tf->lbam = (block >> 8) & 0xff; 1447 tf->lbal = block & 0xff; 1448 1449 tf->device |= ATA_LBA; 1450 } else { 1451 /* CHS */ 1452 u32 sect, head, cyl, track; 1453 1454 if (!lba_28_ok(block, n_block)) 1455 goto out_of_range; 1456 1457 /* Convert LBA to CHS */ 1458 track = (u32)block / dev->sectors; 1459 cyl = track / dev->heads; 1460 head = track % dev->heads; 1461 sect = (u32)block % dev->sectors + 1; 1462 1463 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1464 (u32)block, track, cyl, head, sect); 1465 1466 /* Check whether the converted CHS can fit. 1467 Cylinder: 0-65535 1468 Head: 0-15 1469 Sector: 1-255*/ 1470 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1471 goto out_of_range; 1472 1473 tf->command = ATA_CMD_VERIFY; 1474 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1475 tf->lbal = sect; 1476 tf->lbam = cyl; 1477 tf->lbah = cyl >> 8; 1478 tf->device |= head; 1479 } 1480 1481 return 0; 1482 1483 invalid_fld: 1484 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1485 return 1; 1486 1487 out_of_range: 1488 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1489 /* "Logical Block Address out of range" */ 1490 return 1; 1491 1492 nothing_to_do: 1493 scmd->result = SAM_STAT_GOOD; 1494 return 1; 1495 } 1496 1497 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1498 { 1499 struct request *rq = scsi_cmd_to_rq(scmd); 1500 u32 req_blocks; 1501 1502 if (!blk_rq_is_passthrough(rq)) 1503 return true; 1504 1505 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1506 if (n_blocks > req_blocks) 1507 return false; 1508 1509 return true; 1510 } 1511 1512 /** 1513 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1514 * @qc: Storage for translated ATA taskfile 1515 * 1516 * Converts any of six SCSI read/write commands into the 1517 * ATA counterpart, including starting sector (LBA), 1518 * sector count, and taking into account the device's LBA48 1519 * support. 1520 * 1521 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1522 * %WRITE_16 are currently supported. 1523 * 1524 * LOCKING: 1525 * spin_lock_irqsave(host lock) 1526 * 1527 * RETURNS: 1528 * Zero on success, non-zero on error. 1529 */ 1530 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1531 { 1532 struct scsi_cmnd *scmd = qc->scsicmd; 1533 const u8 *cdb = scmd->cmnd; 1534 struct request *rq = scsi_cmd_to_rq(scmd); 1535 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1536 unsigned int tf_flags = 0; 1537 u64 block; 1538 u32 n_block; 1539 int rc; 1540 u16 fp = 0; 1541 1542 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1543 tf_flags |= ATA_TFLAG_WRITE; 1544 1545 /* Calculate the SCSI LBA, transfer length and FUA. */ 1546 switch (cdb[0]) { 1547 case READ_10: 1548 case WRITE_10: 1549 if (unlikely(scmd->cmd_len < 10)) { 1550 fp = 9; 1551 goto invalid_fld; 1552 } 1553 scsi_10_lba_len(cdb, &block, &n_block); 1554 if (cdb[1] & (1 << 3)) 1555 tf_flags |= ATA_TFLAG_FUA; 1556 if (!ata_check_nblocks(scmd, n_block)) 1557 goto invalid_fld; 1558 break; 1559 case READ_6: 1560 case WRITE_6: 1561 if (unlikely(scmd->cmd_len < 6)) { 1562 fp = 5; 1563 goto invalid_fld; 1564 } 1565 scsi_6_lba_len(cdb, &block, &n_block); 1566 1567 /* for 6-byte r/w commands, transfer length 0 1568 * means 256 blocks of data, not 0 block. 1569 */ 1570 if (!n_block) 1571 n_block = 256; 1572 if (!ata_check_nblocks(scmd, n_block)) 1573 goto invalid_fld; 1574 break; 1575 case READ_16: 1576 case WRITE_16: 1577 if (unlikely(scmd->cmd_len < 16)) { 1578 fp = 15; 1579 goto invalid_fld; 1580 } 1581 scsi_16_lba_len(cdb, &block, &n_block); 1582 if (cdb[1] & (1 << 3)) 1583 tf_flags |= ATA_TFLAG_FUA; 1584 if (!ata_check_nblocks(scmd, n_block)) 1585 goto invalid_fld; 1586 break; 1587 default: 1588 DPRINTK("no-byte command\n"); 1589 fp = 0; 1590 goto invalid_fld; 1591 } 1592 1593 /* Check and compose ATA command */ 1594 if (!n_block) 1595 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1596 * length 0 means transfer 0 block of data. 1597 * However, for ATA R/W commands, sector count 0 means 1598 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1599 * 1600 * WARNING: one or two older ATA drives treat 0 as 0... 1601 */ 1602 goto nothing_to_do; 1603 1604 qc->flags |= ATA_QCFLAG_IO; 1605 qc->nbytes = n_block * scmd->device->sector_size; 1606 1607 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1608 qc->hw_tag, class); 1609 1610 if (likely(rc == 0)) 1611 return 0; 1612 1613 if (rc == -ERANGE) 1614 goto out_of_range; 1615 /* treat all other errors as -EINVAL, fall through */ 1616 invalid_fld: 1617 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1618 return 1; 1619 1620 out_of_range: 1621 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1622 /* "Logical Block Address out of range" */ 1623 return 1; 1624 1625 nothing_to_do: 1626 scmd->result = SAM_STAT_GOOD; 1627 return 1; 1628 } 1629 1630 static void ata_qc_done(struct ata_queued_cmd *qc) 1631 { 1632 struct scsi_cmnd *cmd = qc->scsicmd; 1633 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1634 1635 ata_qc_free(qc); 1636 done(cmd); 1637 } 1638 1639 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1640 { 1641 struct ata_port *ap = qc->ap; 1642 struct scsi_cmnd *cmd = qc->scsicmd; 1643 u8 *cdb = cmd->cmnd; 1644 int need_sense = (qc->err_mask != 0); 1645 1646 /* For ATA pass thru (SAT) commands, generate a sense block if 1647 * user mandated it or if there's an error. Note that if we 1648 * generate because the user forced us to [CK_COND =1], a check 1649 * condition is generated and the ATA register values are returned 1650 * whether the command completed successfully or not. If there 1651 * was no error, we use the following sense data: 1652 * sk = RECOVERED ERROR 1653 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1654 */ 1655 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1656 ((cdb[2] & 0x20) || need_sense)) 1657 ata_gen_passthru_sense(qc); 1658 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1659 cmd->result = SAM_STAT_CHECK_CONDITION; 1660 else if (need_sense) 1661 ata_gen_ata_sense(qc); 1662 else 1663 cmd->result = SAM_STAT_GOOD; 1664 1665 if (need_sense && !ap->ops->error_handler) 1666 ata_dump_status(ap->print_id, &qc->result_tf); 1667 1668 ata_qc_done(qc); 1669 } 1670 1671 /** 1672 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1673 * @dev: ATA device to which the command is addressed 1674 * @cmd: SCSI command to execute 1675 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1676 * 1677 * Our ->queuecommand() function has decided that the SCSI 1678 * command issued can be directly translated into an ATA 1679 * command, rather than handled internally. 1680 * 1681 * This function sets up an ata_queued_cmd structure for the 1682 * SCSI command, and sends that ata_queued_cmd to the hardware. 1683 * 1684 * The xlat_func argument (actor) returns 0 if ready to execute 1685 * ATA command, else 1 to finish translation. If 1 is returned 1686 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1687 * to be set reflecting an error condition or clean (early) 1688 * termination. 1689 * 1690 * LOCKING: 1691 * spin_lock_irqsave(host lock) 1692 * 1693 * RETURNS: 1694 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1695 * needs to be deferred. 1696 */ 1697 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1698 ata_xlat_func_t xlat_func) 1699 { 1700 struct ata_port *ap = dev->link->ap; 1701 struct ata_queued_cmd *qc; 1702 int rc; 1703 1704 VPRINTK("ENTER\n"); 1705 1706 qc = ata_scsi_qc_new(dev, cmd); 1707 if (!qc) 1708 goto err_mem; 1709 1710 /* data is present; dma-map it */ 1711 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1712 cmd->sc_data_direction == DMA_TO_DEVICE) { 1713 if (unlikely(scsi_bufflen(cmd) < 1)) { 1714 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1715 goto err_did; 1716 } 1717 1718 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1719 1720 qc->dma_dir = cmd->sc_data_direction; 1721 } 1722 1723 qc->complete_fn = ata_scsi_qc_complete; 1724 1725 if (xlat_func(qc)) 1726 goto early_finish; 1727 1728 if (ap->ops->qc_defer) { 1729 if ((rc = ap->ops->qc_defer(qc))) 1730 goto defer; 1731 } 1732 1733 /* select device, send command to hardware */ 1734 ata_qc_issue(qc); 1735 1736 VPRINTK("EXIT\n"); 1737 return 0; 1738 1739 early_finish: 1740 ata_qc_free(qc); 1741 cmd->scsi_done(cmd); 1742 DPRINTK("EXIT - early finish (good or error)\n"); 1743 return 0; 1744 1745 err_did: 1746 ata_qc_free(qc); 1747 cmd->result = (DID_ERROR << 16); 1748 cmd->scsi_done(cmd); 1749 err_mem: 1750 DPRINTK("EXIT - internal\n"); 1751 return 0; 1752 1753 defer: 1754 ata_qc_free(qc); 1755 DPRINTK("EXIT - defer\n"); 1756 if (rc == ATA_DEFER_LINK) 1757 return SCSI_MLQUEUE_DEVICE_BUSY; 1758 else 1759 return SCSI_MLQUEUE_HOST_BUSY; 1760 } 1761 1762 struct ata_scsi_args { 1763 struct ata_device *dev; 1764 u16 *id; 1765 struct scsi_cmnd *cmd; 1766 }; 1767 1768 /** 1769 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1770 * @args: device IDENTIFY data / SCSI command of interest. 1771 * @actor: Callback hook for desired SCSI command simulator 1772 * 1773 * Takes care of the hard work of simulating a SCSI command... 1774 * Mapping the response buffer, calling the command's handler, 1775 * and handling the handler's return value. This return value 1776 * indicates whether the handler wishes the SCSI command to be 1777 * completed successfully (0), or not (in which case cmd->result 1778 * and sense buffer are assumed to be set). 1779 * 1780 * LOCKING: 1781 * spin_lock_irqsave(host lock) 1782 */ 1783 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1784 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1785 { 1786 unsigned int rc; 1787 struct scsi_cmnd *cmd = args->cmd; 1788 unsigned long flags; 1789 1790 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1791 1792 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1793 rc = actor(args, ata_scsi_rbuf); 1794 if (rc == 0) 1795 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1796 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1797 1798 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1799 1800 if (rc == 0) 1801 cmd->result = SAM_STAT_GOOD; 1802 } 1803 1804 /** 1805 * ata_scsiop_inq_std - Simulate INQUIRY command 1806 * @args: device IDENTIFY data / SCSI command of interest. 1807 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1808 * 1809 * Returns standard device identification data associated 1810 * with non-VPD INQUIRY command output. 1811 * 1812 * LOCKING: 1813 * spin_lock_irqsave(host lock) 1814 */ 1815 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1816 { 1817 static const u8 versions[] = { 1818 0x00, 1819 0x60, /* SAM-3 (no version claimed) */ 1820 1821 0x03, 1822 0x20, /* SBC-2 (no version claimed) */ 1823 1824 0x03, 1825 0x00 /* SPC-3 (no version claimed) */ 1826 }; 1827 static const u8 versions_zbc[] = { 1828 0x00, 1829 0xA0, /* SAM-5 (no version claimed) */ 1830 1831 0x06, 1832 0x00, /* SBC-4 (no version claimed) */ 1833 1834 0x05, 1835 0xC0, /* SPC-5 (no version claimed) */ 1836 1837 0x60, 1838 0x24, /* ZBC r05 */ 1839 }; 1840 1841 u8 hdr[] = { 1842 TYPE_DISK, 1843 0, 1844 0x5, /* claim SPC-3 version compatibility */ 1845 2, 1846 95 - 4, 1847 0, 1848 0, 1849 2 1850 }; 1851 1852 VPRINTK("ENTER\n"); 1853 1854 /* set scsi removable (RMB) bit per ata bit, or if the 1855 * AHCI port says it's external (Hotplug-capable, eSATA). 1856 */ 1857 if (ata_id_removable(args->id) || 1858 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1859 hdr[1] |= (1 << 7); 1860 1861 if (args->dev->class == ATA_DEV_ZAC) { 1862 hdr[0] = TYPE_ZBC; 1863 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1864 } 1865 1866 memcpy(rbuf, hdr, sizeof(hdr)); 1867 memcpy(&rbuf[8], "ATA ", 8); 1868 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1869 1870 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1871 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1872 if (strncmp(&rbuf[32], " ", 4) == 0) 1873 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1874 1875 if (rbuf[32] == 0 || rbuf[32] == ' ') 1876 memcpy(&rbuf[32], "n/a ", 4); 1877 1878 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1879 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1880 else 1881 memcpy(rbuf + 58, versions, sizeof(versions)); 1882 1883 return 0; 1884 } 1885 1886 /** 1887 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1888 * @args: device IDENTIFY data / SCSI command of interest. 1889 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1890 * 1891 * Returns list of inquiry VPD pages available. 1892 * 1893 * LOCKING: 1894 * spin_lock_irqsave(host lock) 1895 */ 1896 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1897 { 1898 int num_pages; 1899 static const u8 pages[] = { 1900 0x00, /* page 0x00, this page */ 1901 0x80, /* page 0x80, unit serial no page */ 1902 0x83, /* page 0x83, device ident page */ 1903 0x89, /* page 0x89, ata info page */ 1904 0xb0, /* page 0xb0, block limits page */ 1905 0xb1, /* page 0xb1, block device characteristics page */ 1906 0xb2, /* page 0xb2, thin provisioning page */ 1907 0xb6, /* page 0xb6, zoned block device characteristics */ 1908 }; 1909 1910 num_pages = sizeof(pages); 1911 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 1912 num_pages--; 1913 rbuf[3] = num_pages; /* number of supported VPD pages */ 1914 memcpy(rbuf + 4, pages, num_pages); 1915 return 0; 1916 } 1917 1918 /** 1919 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1920 * @args: device IDENTIFY data / SCSI command of interest. 1921 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1922 * 1923 * Returns ATA device serial number. 1924 * 1925 * LOCKING: 1926 * spin_lock_irqsave(host lock) 1927 */ 1928 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1929 { 1930 static const u8 hdr[] = { 1931 0, 1932 0x80, /* this page code */ 1933 0, 1934 ATA_ID_SERNO_LEN, /* page len */ 1935 }; 1936 1937 memcpy(rbuf, hdr, sizeof(hdr)); 1938 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1939 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1940 return 0; 1941 } 1942 1943 /** 1944 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1945 * @args: device IDENTIFY data / SCSI command of interest. 1946 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1947 * 1948 * Yields two logical unit device identification designators: 1949 * - vendor specific ASCII containing the ATA serial number 1950 * - SAT defined "t10 vendor id based" containing ASCII vendor 1951 * name ("ATA "), model and serial numbers. 1952 * 1953 * LOCKING: 1954 * spin_lock_irqsave(host lock) 1955 */ 1956 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 1957 { 1958 const int sat_model_serial_desc_len = 68; 1959 int num; 1960 1961 rbuf[1] = 0x83; /* this page code */ 1962 num = 4; 1963 1964 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1965 rbuf[num + 0] = 2; 1966 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1967 num += 4; 1968 ata_id_string(args->id, (unsigned char *) rbuf + num, 1969 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1970 num += ATA_ID_SERNO_LEN; 1971 1972 /* SAT defined lu model and serial numbers descriptor */ 1973 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 1974 rbuf[num + 0] = 2; 1975 rbuf[num + 1] = 1; 1976 rbuf[num + 3] = sat_model_serial_desc_len; 1977 num += 4; 1978 memcpy(rbuf + num, "ATA ", 8); 1979 num += 8; 1980 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 1981 ATA_ID_PROD_LEN); 1982 num += ATA_ID_PROD_LEN; 1983 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 1984 ATA_ID_SERNO_LEN); 1985 num += ATA_ID_SERNO_LEN; 1986 1987 if (ata_id_has_wwn(args->id)) { 1988 /* SAT defined lu world wide name */ 1989 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 1990 rbuf[num + 0] = 1; 1991 rbuf[num + 1] = 3; 1992 rbuf[num + 3] = ATA_ID_WWN_LEN; 1993 num += 4; 1994 ata_id_string(args->id, (unsigned char *) rbuf + num, 1995 ATA_ID_WWN, ATA_ID_WWN_LEN); 1996 num += ATA_ID_WWN_LEN; 1997 } 1998 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 1999 return 0; 2000 } 2001 2002 /** 2003 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2004 * @args: device IDENTIFY data / SCSI command of interest. 2005 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2006 * 2007 * Yields SAT-specified ATA VPD page. 2008 * 2009 * LOCKING: 2010 * spin_lock_irqsave(host lock) 2011 */ 2012 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2013 { 2014 rbuf[1] = 0x89; /* our page code */ 2015 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2016 rbuf[3] = (0x238 & 0xff); 2017 2018 memcpy(&rbuf[8], "linux ", 8); 2019 memcpy(&rbuf[16], "libata ", 16); 2020 memcpy(&rbuf[32], DRV_VERSION, 4); 2021 2022 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2023 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2024 /* TODO: PMP? */ 2025 2026 /* we don't store the ATA device signature, so we fake it */ 2027 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2028 rbuf[40] = 0x1; 2029 rbuf[48] = 0x1; 2030 2031 rbuf[56] = ATA_CMD_ID_ATA; 2032 2033 memcpy(&rbuf[60], &args->id[0], 512); 2034 return 0; 2035 } 2036 2037 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2038 { 2039 struct ata_device *dev = args->dev; 2040 u16 min_io_sectors; 2041 2042 rbuf[1] = 0xb0; 2043 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2044 2045 /* 2046 * Optimal transfer length granularity. 2047 * 2048 * This is always one physical block, but for disks with a smaller 2049 * logical than physical sector size we need to figure out what the 2050 * latter is. 2051 */ 2052 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2053 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2054 2055 /* 2056 * Optimal unmap granularity. 2057 * 2058 * The ATA spec doesn't even know about a granularity or alignment 2059 * for the TRIM command. We can leave away most of the unmap related 2060 * VPD page entries, but we have specifify a granularity to signal 2061 * that we support some form of unmap - in thise case via WRITE SAME 2062 * with the unmap bit set. 2063 */ 2064 if (ata_id_has_trim(args->id)) { 2065 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2066 2067 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2068 max_blocks = 128 << (20 - SECTOR_SHIFT); 2069 2070 put_unaligned_be64(max_blocks, &rbuf[36]); 2071 put_unaligned_be32(1, &rbuf[28]); 2072 } 2073 2074 return 0; 2075 } 2076 2077 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2078 { 2079 int form_factor = ata_id_form_factor(args->id); 2080 int media_rotation_rate = ata_id_rotation_rate(args->id); 2081 u8 zoned = ata_id_zoned_cap(args->id); 2082 2083 rbuf[1] = 0xb1; 2084 rbuf[3] = 0x3c; 2085 rbuf[4] = media_rotation_rate >> 8; 2086 rbuf[5] = media_rotation_rate; 2087 rbuf[7] = form_factor; 2088 if (zoned) 2089 rbuf[8] = (zoned << 4); 2090 2091 return 0; 2092 } 2093 2094 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2095 { 2096 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2097 rbuf[1] = 0xb2; 2098 rbuf[3] = 0x4; 2099 rbuf[5] = 1 << 6; /* TPWS */ 2100 2101 return 0; 2102 } 2103 2104 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2105 { 2106 /* 2107 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2108 */ 2109 rbuf[1] = 0xb6; 2110 rbuf[3] = 0x3C; 2111 2112 /* 2113 * URSWRZ bit is only meaningful for host-managed ZAC drives 2114 */ 2115 if (args->dev->zac_zoned_cap & 1) 2116 rbuf[4] |= 1; 2117 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2118 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2119 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2120 2121 return 0; 2122 } 2123 2124 /** 2125 * modecpy - Prepare response for MODE SENSE 2126 * @dest: output buffer 2127 * @src: data being copied 2128 * @n: length of mode page 2129 * @changeable: whether changeable parameters are requested 2130 * 2131 * Generate a generic MODE SENSE page for either current or changeable 2132 * parameters. 2133 * 2134 * LOCKING: 2135 * None. 2136 */ 2137 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2138 { 2139 if (changeable) { 2140 memcpy(dest, src, 2); 2141 memset(dest + 2, 0, n - 2); 2142 } else { 2143 memcpy(dest, src, n); 2144 } 2145 } 2146 2147 /** 2148 * ata_msense_caching - Simulate MODE SENSE caching info page 2149 * @id: device IDENTIFY data 2150 * @buf: output buffer 2151 * @changeable: whether changeable parameters are requested 2152 * 2153 * Generate a caching info page, which conditionally indicates 2154 * write caching to the SCSI layer, depending on device 2155 * capabilities. 2156 * 2157 * LOCKING: 2158 * None. 2159 */ 2160 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2161 { 2162 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2163 if (changeable) { 2164 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2165 } else { 2166 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2167 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2168 } 2169 return sizeof(def_cache_mpage); 2170 } 2171 2172 /** 2173 * ata_msense_control - Simulate MODE SENSE control mode page 2174 * @dev: ATA device of interest 2175 * @buf: output buffer 2176 * @changeable: whether changeable parameters are requested 2177 * 2178 * Generate a generic MODE SENSE control mode page. 2179 * 2180 * LOCKING: 2181 * None. 2182 */ 2183 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2184 bool changeable) 2185 { 2186 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2187 if (changeable) { 2188 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2189 } else { 2190 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2191 2192 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2193 } 2194 return sizeof(def_control_mpage); 2195 } 2196 2197 /** 2198 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2199 * @buf: output buffer 2200 * @changeable: whether changeable parameters are requested 2201 * 2202 * Generate a generic MODE SENSE r/w error recovery page. 2203 * 2204 * LOCKING: 2205 * None. 2206 */ 2207 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2208 { 2209 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2210 changeable); 2211 return sizeof(def_rw_recovery_mpage); 2212 } 2213 2214 /* 2215 * We can turn this into a real blacklist if it's needed, for now just 2216 * blacklist any Maxtor BANC1G10 revision firmware 2217 */ 2218 static int ata_dev_supports_fua(u16 *id) 2219 { 2220 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2221 2222 if (!libata_fua) 2223 return 0; 2224 if (!ata_id_has_fua(id)) 2225 return 0; 2226 2227 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2228 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2229 2230 if (strcmp(model, "Maxtor")) 2231 return 1; 2232 if (strcmp(fw, "BANC1G10")) 2233 return 1; 2234 2235 return 0; /* blacklisted */ 2236 } 2237 2238 /** 2239 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2240 * @args: device IDENTIFY data / SCSI command of interest. 2241 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2242 * 2243 * Simulate MODE SENSE commands. Assume this is invoked for direct 2244 * access devices (e.g. disks) only. There should be no block 2245 * descriptor for other device types. 2246 * 2247 * LOCKING: 2248 * spin_lock_irqsave(host lock) 2249 */ 2250 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2251 { 2252 struct ata_device *dev = args->dev; 2253 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2254 static const u8 sat_blk_desc[] = { 2255 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2256 0, 2257 0, 0x2, 0x0 /* block length: 512 bytes */ 2258 }; 2259 u8 pg, spg; 2260 unsigned int ebd, page_control, six_byte; 2261 u8 dpofua, bp = 0xff; 2262 u16 fp; 2263 2264 VPRINTK("ENTER\n"); 2265 2266 six_byte = (scsicmd[0] == MODE_SENSE); 2267 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2268 /* 2269 * LLBA bit in msense(10) ignored (compliant) 2270 */ 2271 2272 page_control = scsicmd[2] >> 6; 2273 switch (page_control) { 2274 case 0: /* current */ 2275 case 1: /* changeable */ 2276 case 2: /* defaults */ 2277 break; /* supported */ 2278 case 3: /* saved */ 2279 goto saving_not_supp; 2280 default: 2281 fp = 2; 2282 bp = 6; 2283 goto invalid_fld; 2284 } 2285 2286 if (six_byte) 2287 p += 4 + (ebd ? 8 : 0); 2288 else 2289 p += 8 + (ebd ? 8 : 0); 2290 2291 pg = scsicmd[2] & 0x3f; 2292 spg = scsicmd[3]; 2293 /* 2294 * No mode subpages supported (yet) but asking for _all_ 2295 * subpages may be valid 2296 */ 2297 if (spg && (spg != ALL_SUB_MPAGES)) { 2298 fp = 3; 2299 goto invalid_fld; 2300 } 2301 2302 switch(pg) { 2303 case RW_RECOVERY_MPAGE: 2304 p += ata_msense_rw_recovery(p, page_control == 1); 2305 break; 2306 2307 case CACHE_MPAGE: 2308 p += ata_msense_caching(args->id, p, page_control == 1); 2309 break; 2310 2311 case CONTROL_MPAGE: 2312 p += ata_msense_control(args->dev, p, page_control == 1); 2313 break; 2314 2315 case ALL_MPAGES: 2316 p += ata_msense_rw_recovery(p, page_control == 1); 2317 p += ata_msense_caching(args->id, p, page_control == 1); 2318 p += ata_msense_control(args->dev, p, page_control == 1); 2319 break; 2320 2321 default: /* invalid page code */ 2322 fp = 2; 2323 goto invalid_fld; 2324 } 2325 2326 dpofua = 0; 2327 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2328 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2329 dpofua = 1 << 4; 2330 2331 if (six_byte) { 2332 rbuf[0] = p - rbuf - 1; 2333 rbuf[2] |= dpofua; 2334 if (ebd) { 2335 rbuf[3] = sizeof(sat_blk_desc); 2336 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2337 } 2338 } else { 2339 unsigned int output_len = p - rbuf - 2; 2340 2341 rbuf[0] = output_len >> 8; 2342 rbuf[1] = output_len; 2343 rbuf[3] |= dpofua; 2344 if (ebd) { 2345 rbuf[7] = sizeof(sat_blk_desc); 2346 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2347 } 2348 } 2349 return 0; 2350 2351 invalid_fld: 2352 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2353 return 1; 2354 2355 saving_not_supp: 2356 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2357 /* "Saving parameters not supported" */ 2358 return 1; 2359 } 2360 2361 /** 2362 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2363 * @args: device IDENTIFY data / SCSI command of interest. 2364 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2365 * 2366 * Simulate READ CAPACITY commands. 2367 * 2368 * LOCKING: 2369 * None. 2370 */ 2371 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2372 { 2373 struct ata_device *dev = args->dev; 2374 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2375 u32 sector_size; /* physical sector size in bytes */ 2376 u8 log2_per_phys; 2377 u16 lowest_aligned; 2378 2379 sector_size = ata_id_logical_sector_size(dev->id); 2380 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2381 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2382 2383 VPRINTK("ENTER\n"); 2384 2385 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2386 if (last_lba >= 0xffffffffULL) 2387 last_lba = 0xffffffff; 2388 2389 /* sector count, 32-bit */ 2390 rbuf[0] = last_lba >> (8 * 3); 2391 rbuf[1] = last_lba >> (8 * 2); 2392 rbuf[2] = last_lba >> (8 * 1); 2393 rbuf[3] = last_lba; 2394 2395 /* sector size */ 2396 rbuf[4] = sector_size >> (8 * 3); 2397 rbuf[5] = sector_size >> (8 * 2); 2398 rbuf[6] = sector_size >> (8 * 1); 2399 rbuf[7] = sector_size; 2400 } else { 2401 /* sector count, 64-bit */ 2402 rbuf[0] = last_lba >> (8 * 7); 2403 rbuf[1] = last_lba >> (8 * 6); 2404 rbuf[2] = last_lba >> (8 * 5); 2405 rbuf[3] = last_lba >> (8 * 4); 2406 rbuf[4] = last_lba >> (8 * 3); 2407 rbuf[5] = last_lba >> (8 * 2); 2408 rbuf[6] = last_lba >> (8 * 1); 2409 rbuf[7] = last_lba; 2410 2411 /* sector size */ 2412 rbuf[ 8] = sector_size >> (8 * 3); 2413 rbuf[ 9] = sector_size >> (8 * 2); 2414 rbuf[10] = sector_size >> (8 * 1); 2415 rbuf[11] = sector_size; 2416 2417 rbuf[12] = 0; 2418 rbuf[13] = log2_per_phys; 2419 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2420 rbuf[15] = lowest_aligned; 2421 2422 if (ata_id_has_trim(args->id) && 2423 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2424 rbuf[14] |= 0x80; /* LBPME */ 2425 2426 if (ata_id_has_zero_after_trim(args->id) && 2427 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2428 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2429 rbuf[14] |= 0x40; /* LBPRZ */ 2430 } 2431 } 2432 if (ata_id_zoned_cap(args->id) || 2433 args->dev->class == ATA_DEV_ZAC) 2434 rbuf[12] = (1 << 4); /* RC_BASIS */ 2435 } 2436 return 0; 2437 } 2438 2439 /** 2440 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2441 * @args: device IDENTIFY data / SCSI command of interest. 2442 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2443 * 2444 * Simulate REPORT LUNS command. 2445 * 2446 * LOCKING: 2447 * spin_lock_irqsave(host lock) 2448 */ 2449 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2450 { 2451 VPRINTK("ENTER\n"); 2452 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2453 2454 return 0; 2455 } 2456 2457 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2458 { 2459 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2460 /* FIXME: not quite right; we don't want the 2461 * translation of taskfile registers into 2462 * a sense descriptors, since that's only 2463 * correct for ATA, not ATAPI 2464 */ 2465 ata_gen_passthru_sense(qc); 2466 } 2467 2468 ata_qc_done(qc); 2469 } 2470 2471 /* is it pointless to prefer PIO for "safety reasons"? */ 2472 static inline int ata_pio_use_silly(struct ata_port *ap) 2473 { 2474 return (ap->flags & ATA_FLAG_PIO_DMA); 2475 } 2476 2477 static void atapi_request_sense(struct ata_queued_cmd *qc) 2478 { 2479 struct ata_port *ap = qc->ap; 2480 struct scsi_cmnd *cmd = qc->scsicmd; 2481 2482 DPRINTK("ATAPI request sense\n"); 2483 2484 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2485 2486 #ifdef CONFIG_ATA_SFF 2487 if (ap->ops->sff_tf_read) 2488 ap->ops->sff_tf_read(ap, &qc->tf); 2489 #endif 2490 2491 /* fill these in, for the case where they are -not- overwritten */ 2492 cmd->sense_buffer[0] = 0x70; 2493 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2494 2495 ata_qc_reinit(qc); 2496 2497 /* setup sg table and init transfer direction */ 2498 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2499 ata_sg_init(qc, &qc->sgent, 1); 2500 qc->dma_dir = DMA_FROM_DEVICE; 2501 2502 memset(&qc->cdb, 0, qc->dev->cdb_len); 2503 qc->cdb[0] = REQUEST_SENSE; 2504 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2505 2506 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2507 qc->tf.command = ATA_CMD_PACKET; 2508 2509 if (ata_pio_use_silly(ap)) { 2510 qc->tf.protocol = ATAPI_PROT_DMA; 2511 qc->tf.feature |= ATAPI_PKT_DMA; 2512 } else { 2513 qc->tf.protocol = ATAPI_PROT_PIO; 2514 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2515 qc->tf.lbah = 0; 2516 } 2517 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2518 2519 qc->complete_fn = atapi_sense_complete; 2520 2521 ata_qc_issue(qc); 2522 2523 DPRINTK("EXIT\n"); 2524 } 2525 2526 /* 2527 * ATAPI devices typically report zero for their SCSI version, and sometimes 2528 * deviate from the spec WRT response data format. If SCSI version is 2529 * reported as zero like normal, then we make the following fixups: 2530 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2531 * modern device. 2532 * 2) Ensure response data format / ATAPI information are always correct. 2533 */ 2534 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2535 { 2536 u8 buf[4]; 2537 2538 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2539 if (buf[2] == 0) { 2540 buf[2] = 0x5; 2541 buf[3] = 0x32; 2542 } 2543 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2544 } 2545 2546 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2547 { 2548 struct scsi_cmnd *cmd = qc->scsicmd; 2549 unsigned int err_mask = qc->err_mask; 2550 2551 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2552 2553 /* handle completion from new EH */ 2554 if (unlikely(qc->ap->ops->error_handler && 2555 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2556 2557 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2558 /* FIXME: not quite right; we don't want the 2559 * translation of taskfile registers into a 2560 * sense descriptors, since that's only 2561 * correct for ATA, not ATAPI 2562 */ 2563 ata_gen_passthru_sense(qc); 2564 } 2565 2566 /* SCSI EH automatically locks door if sdev->locked is 2567 * set. Sometimes door lock request continues to 2568 * fail, for example, when no media is present. This 2569 * creates a loop - SCSI EH issues door lock which 2570 * fails and gets invoked again to acquire sense data 2571 * for the failed command. 2572 * 2573 * If door lock fails, always clear sdev->locked to 2574 * avoid this infinite loop. 2575 * 2576 * This may happen before SCSI scan is complete. Make 2577 * sure qc->dev->sdev isn't NULL before dereferencing. 2578 */ 2579 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2580 qc->dev->sdev->locked = 0; 2581 2582 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2583 ata_qc_done(qc); 2584 return; 2585 } 2586 2587 /* successful completion or old EH failure path */ 2588 if (unlikely(err_mask & AC_ERR_DEV)) { 2589 cmd->result = SAM_STAT_CHECK_CONDITION; 2590 atapi_request_sense(qc); 2591 return; 2592 } else if (unlikely(err_mask)) { 2593 /* FIXME: not quite right; we don't want the 2594 * translation of taskfile registers into 2595 * a sense descriptors, since that's only 2596 * correct for ATA, not ATAPI 2597 */ 2598 ata_gen_passthru_sense(qc); 2599 } else { 2600 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2601 atapi_fixup_inquiry(cmd); 2602 cmd->result = SAM_STAT_GOOD; 2603 } 2604 2605 ata_qc_done(qc); 2606 } 2607 /** 2608 * atapi_xlat - Initialize PACKET taskfile 2609 * @qc: command structure to be initialized 2610 * 2611 * LOCKING: 2612 * spin_lock_irqsave(host lock) 2613 * 2614 * RETURNS: 2615 * Zero on success, non-zero on failure. 2616 */ 2617 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2618 { 2619 struct scsi_cmnd *scmd = qc->scsicmd; 2620 struct ata_device *dev = qc->dev; 2621 int nodata = (scmd->sc_data_direction == DMA_NONE); 2622 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2623 unsigned int nbytes; 2624 2625 memset(qc->cdb, 0, dev->cdb_len); 2626 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2627 2628 qc->complete_fn = atapi_qc_complete; 2629 2630 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2631 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2632 qc->tf.flags |= ATA_TFLAG_WRITE; 2633 DPRINTK("direction: write\n"); 2634 } 2635 2636 qc->tf.command = ATA_CMD_PACKET; 2637 ata_qc_set_pc_nbytes(qc); 2638 2639 /* check whether ATAPI DMA is safe */ 2640 if (!nodata && !using_pio && atapi_check_dma(qc)) 2641 using_pio = 1; 2642 2643 /* Some controller variants snoop this value for Packet 2644 * transfers to do state machine and FIFO management. Thus we 2645 * want to set it properly, and for DMA where it is 2646 * effectively meaningless. 2647 */ 2648 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2649 2650 /* Most ATAPI devices which honor transfer chunk size don't 2651 * behave according to the spec when odd chunk size which 2652 * matches the transfer length is specified. If the number of 2653 * bytes to transfer is 2n+1. According to the spec, what 2654 * should happen is to indicate that 2n+1 is going to be 2655 * transferred and transfer 2n+2 bytes where the last byte is 2656 * padding. 2657 * 2658 * In practice, this doesn't happen. ATAPI devices first 2659 * indicate and transfer 2n bytes and then indicate and 2660 * transfer 2 bytes where the last byte is padding. 2661 * 2662 * This inconsistency confuses several controllers which 2663 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2664 * These controllers use actual number of transferred bytes to 2665 * update DMA pointer and transfer of 4n+2 bytes make those 2666 * controller push DMA pointer by 4n+4 bytes because SATA data 2667 * FISes are aligned to 4 bytes. This causes data corruption 2668 * and buffer overrun. 2669 * 2670 * Always setting nbytes to even number solves this problem 2671 * because then ATAPI devices don't have to split data at 2n 2672 * boundaries. 2673 */ 2674 if (nbytes & 0x1) 2675 nbytes++; 2676 2677 qc->tf.lbam = (nbytes & 0xFF); 2678 qc->tf.lbah = (nbytes >> 8); 2679 2680 if (nodata) 2681 qc->tf.protocol = ATAPI_PROT_NODATA; 2682 else if (using_pio) 2683 qc->tf.protocol = ATAPI_PROT_PIO; 2684 else { 2685 /* DMA data xfer */ 2686 qc->tf.protocol = ATAPI_PROT_DMA; 2687 qc->tf.feature |= ATAPI_PKT_DMA; 2688 2689 if ((dev->flags & ATA_DFLAG_DMADIR) && 2690 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2691 /* some SATA bridges need us to indicate data xfer direction */ 2692 qc->tf.feature |= ATAPI_DMADIR; 2693 } 2694 2695 2696 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2697 as ATAPI tape drives don't get this right otherwise */ 2698 return 0; 2699 } 2700 2701 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2702 { 2703 if (!sata_pmp_attached(ap)) { 2704 if (likely(devno >= 0 && 2705 devno < ata_link_max_devices(&ap->link))) 2706 return &ap->link.device[devno]; 2707 } else { 2708 if (likely(devno >= 0 && 2709 devno < ap->nr_pmp_links)) 2710 return &ap->pmp_link[devno].device[0]; 2711 } 2712 2713 return NULL; 2714 } 2715 2716 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2717 const struct scsi_device *scsidev) 2718 { 2719 int devno; 2720 2721 /* skip commands not addressed to targets we simulate */ 2722 if (!sata_pmp_attached(ap)) { 2723 if (unlikely(scsidev->channel || scsidev->lun)) 2724 return NULL; 2725 devno = scsidev->id; 2726 } else { 2727 if (unlikely(scsidev->id || scsidev->lun)) 2728 return NULL; 2729 devno = scsidev->channel; 2730 } 2731 2732 return ata_find_dev(ap, devno); 2733 } 2734 2735 /** 2736 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2737 * @ap: ATA port to which the device is attached 2738 * @scsidev: SCSI device from which we derive the ATA device 2739 * 2740 * Given various information provided in struct scsi_cmnd, 2741 * map that onto an ATA bus, and using that mapping 2742 * determine which ata_device is associated with the 2743 * SCSI command to be sent. 2744 * 2745 * LOCKING: 2746 * spin_lock_irqsave(host lock) 2747 * 2748 * RETURNS: 2749 * Associated ATA device, or %NULL if not found. 2750 */ 2751 struct ata_device * 2752 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2753 { 2754 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2755 2756 if (unlikely(!dev || !ata_dev_enabled(dev))) 2757 return NULL; 2758 2759 return dev; 2760 } 2761 2762 /* 2763 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2764 * @byte1: Byte 1 from pass-thru CDB. 2765 * 2766 * RETURNS: 2767 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2768 */ 2769 static u8 2770 ata_scsi_map_proto(u8 byte1) 2771 { 2772 switch((byte1 & 0x1e) >> 1) { 2773 case 3: /* Non-data */ 2774 return ATA_PROT_NODATA; 2775 2776 case 6: /* DMA */ 2777 case 10: /* UDMA Data-in */ 2778 case 11: /* UDMA Data-Out */ 2779 return ATA_PROT_DMA; 2780 2781 case 4: /* PIO Data-in */ 2782 case 5: /* PIO Data-out */ 2783 return ATA_PROT_PIO; 2784 2785 case 12: /* FPDMA */ 2786 return ATA_PROT_NCQ; 2787 2788 case 0: /* Hard Reset */ 2789 case 1: /* SRST */ 2790 case 8: /* Device Diagnostic */ 2791 case 9: /* Device Reset */ 2792 case 7: /* DMA Queued */ 2793 case 15: /* Return Response Info */ 2794 default: /* Reserved */ 2795 break; 2796 } 2797 2798 return ATA_PROT_UNKNOWN; 2799 } 2800 2801 /** 2802 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2803 * @qc: command structure to be initialized 2804 * 2805 * Handles either 12, 16, or 32-byte versions of the CDB. 2806 * 2807 * RETURNS: 2808 * Zero on success, non-zero on failure. 2809 */ 2810 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2811 { 2812 struct ata_taskfile *tf = &(qc->tf); 2813 struct scsi_cmnd *scmd = qc->scsicmd; 2814 struct ata_device *dev = qc->dev; 2815 const u8 *cdb = scmd->cmnd; 2816 u16 fp; 2817 u16 cdb_offset = 0; 2818 2819 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2820 if (cdb[0] == VARIABLE_LENGTH_CMD) 2821 cdb_offset = 9; 2822 2823 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2824 if (tf->protocol == ATA_PROT_UNKNOWN) { 2825 fp = 1; 2826 goto invalid_fld; 2827 } 2828 2829 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0) 2830 tf->protocol = ATA_PROT_NCQ_NODATA; 2831 2832 /* enable LBA */ 2833 tf->flags |= ATA_TFLAG_LBA; 2834 2835 /* 2836 * 12 and 16 byte CDBs use different offsets to 2837 * provide the various register values. 2838 */ 2839 if (cdb[0] == ATA_16) { 2840 /* 2841 * 16-byte CDB - may contain extended commands. 2842 * 2843 * If that is the case, copy the upper byte register values. 2844 */ 2845 if (cdb[1] & 0x01) { 2846 tf->hob_feature = cdb[3]; 2847 tf->hob_nsect = cdb[5]; 2848 tf->hob_lbal = cdb[7]; 2849 tf->hob_lbam = cdb[9]; 2850 tf->hob_lbah = cdb[11]; 2851 tf->flags |= ATA_TFLAG_LBA48; 2852 } else 2853 tf->flags &= ~ATA_TFLAG_LBA48; 2854 2855 /* 2856 * Always copy low byte, device and command registers. 2857 */ 2858 tf->feature = cdb[4]; 2859 tf->nsect = cdb[6]; 2860 tf->lbal = cdb[8]; 2861 tf->lbam = cdb[10]; 2862 tf->lbah = cdb[12]; 2863 tf->device = cdb[13]; 2864 tf->command = cdb[14]; 2865 } else if (cdb[0] == ATA_12) { 2866 /* 2867 * 12-byte CDB - incapable of extended commands. 2868 */ 2869 tf->flags &= ~ATA_TFLAG_LBA48; 2870 2871 tf->feature = cdb[3]; 2872 tf->nsect = cdb[4]; 2873 tf->lbal = cdb[5]; 2874 tf->lbam = cdb[6]; 2875 tf->lbah = cdb[7]; 2876 tf->device = cdb[8]; 2877 tf->command = cdb[9]; 2878 } else { 2879 /* 2880 * 32-byte CDB - may contain extended command fields. 2881 * 2882 * If that is the case, copy the upper byte register values. 2883 */ 2884 if (cdb[10] & 0x01) { 2885 tf->hob_feature = cdb[20]; 2886 tf->hob_nsect = cdb[22]; 2887 tf->hob_lbal = cdb[16]; 2888 tf->hob_lbam = cdb[15]; 2889 tf->hob_lbah = cdb[14]; 2890 tf->flags |= ATA_TFLAG_LBA48; 2891 } else 2892 tf->flags &= ~ATA_TFLAG_LBA48; 2893 2894 tf->feature = cdb[21]; 2895 tf->nsect = cdb[23]; 2896 tf->lbal = cdb[19]; 2897 tf->lbam = cdb[18]; 2898 tf->lbah = cdb[17]; 2899 tf->device = cdb[24]; 2900 tf->command = cdb[25]; 2901 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2902 } 2903 2904 /* For NCQ commands copy the tag value */ 2905 if (ata_is_ncq(tf->protocol)) 2906 tf->nsect = qc->hw_tag << 3; 2907 2908 /* enforce correct master/slave bit */ 2909 tf->device = dev->devno ? 2910 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2911 2912 switch (tf->command) { 2913 /* READ/WRITE LONG use a non-standard sect_size */ 2914 case ATA_CMD_READ_LONG: 2915 case ATA_CMD_READ_LONG_ONCE: 2916 case ATA_CMD_WRITE_LONG: 2917 case ATA_CMD_WRITE_LONG_ONCE: 2918 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 2919 fp = 1; 2920 goto invalid_fld; 2921 } 2922 qc->sect_size = scsi_bufflen(scmd); 2923 break; 2924 2925 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2926 case ATA_CMD_CFA_WRITE_NE: 2927 case ATA_CMD_CFA_TRANS_SECT: 2928 case ATA_CMD_CFA_WRITE_MULT_NE: 2929 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2930 case ATA_CMD_READ: 2931 case ATA_CMD_READ_EXT: 2932 case ATA_CMD_READ_QUEUED: 2933 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2934 case ATA_CMD_FPDMA_READ: 2935 case ATA_CMD_READ_MULTI: 2936 case ATA_CMD_READ_MULTI_EXT: 2937 case ATA_CMD_PIO_READ: 2938 case ATA_CMD_PIO_READ_EXT: 2939 case ATA_CMD_READ_STREAM_DMA_EXT: 2940 case ATA_CMD_READ_STREAM_EXT: 2941 case ATA_CMD_VERIFY: 2942 case ATA_CMD_VERIFY_EXT: 2943 case ATA_CMD_WRITE: 2944 case ATA_CMD_WRITE_EXT: 2945 case ATA_CMD_WRITE_FUA_EXT: 2946 case ATA_CMD_WRITE_QUEUED: 2947 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2948 case ATA_CMD_FPDMA_WRITE: 2949 case ATA_CMD_WRITE_MULTI: 2950 case ATA_CMD_WRITE_MULTI_EXT: 2951 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2952 case ATA_CMD_PIO_WRITE: 2953 case ATA_CMD_PIO_WRITE_EXT: 2954 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2955 case ATA_CMD_WRITE_STREAM_EXT: 2956 qc->sect_size = scmd->device->sector_size; 2957 break; 2958 2959 /* Everything else uses 512 byte "sectors" */ 2960 default: 2961 qc->sect_size = ATA_SECT_SIZE; 2962 } 2963 2964 /* 2965 * Set flags so that all registers will be written, pass on 2966 * write indication (used for PIO/DMA setup), result TF is 2967 * copied back and we don't whine too much about its failure. 2968 */ 2969 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2970 if (scmd->sc_data_direction == DMA_TO_DEVICE) 2971 tf->flags |= ATA_TFLAG_WRITE; 2972 2973 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 2974 2975 /* 2976 * Set transfer length. 2977 * 2978 * TODO: find out if we need to do more here to 2979 * cover scatter/gather case. 2980 */ 2981 ata_qc_set_pc_nbytes(qc); 2982 2983 /* We may not issue DMA commands if no DMA mode is set */ 2984 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 2985 fp = 1; 2986 goto invalid_fld; 2987 } 2988 2989 /* We may not issue NCQ commands to devices not supporting NCQ */ 2990 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 2991 fp = 1; 2992 goto invalid_fld; 2993 } 2994 2995 /* sanity check for pio multi commands */ 2996 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 2997 fp = 1; 2998 goto invalid_fld; 2999 } 3000 3001 if (is_multi_taskfile(tf)) { 3002 unsigned int multi_count = 1 << (cdb[1] >> 5); 3003 3004 /* compare the passed through multi_count 3005 * with the cached multi_count of libata 3006 */ 3007 if (multi_count != dev->multi_count) 3008 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3009 multi_count); 3010 } 3011 3012 /* 3013 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3014 * SET_FEATURES - XFER MODE must be preceded/succeeded 3015 * by an update to hardware-specific registers for each 3016 * controller (i.e. the reason for ->set_piomode(), 3017 * ->set_dmamode(), and ->post_set_mode() hooks). 3018 */ 3019 if (tf->command == ATA_CMD_SET_FEATURES && 3020 tf->feature == SETFEATURES_XFER) { 3021 fp = (cdb[0] == ATA_16) ? 4 : 3; 3022 goto invalid_fld; 3023 } 3024 3025 /* 3026 * Filter TPM commands by default. These provide an 3027 * essentially uncontrolled encrypted "back door" between 3028 * applications and the disk. Set libata.allow_tpm=1 if you 3029 * have a real reason for wanting to use them. This ensures 3030 * that installed software cannot easily mess stuff up without 3031 * user intent. DVR type users will probably ship with this enabled 3032 * for movie content management. 3033 * 3034 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3035 * for this and should do in future but that it is not sufficient as 3036 * DCS is an optional feature set. Thus we also do the software filter 3037 * so that we comply with the TC consortium stated goal that the user 3038 * can turn off TC features of their system. 3039 */ 3040 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3041 fp = (cdb[0] == ATA_16) ? 14 : 9; 3042 goto invalid_fld; 3043 } 3044 3045 return 0; 3046 3047 invalid_fld: 3048 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3049 return 1; 3050 } 3051 3052 /** 3053 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3054 * @cmd: SCSI command being translated 3055 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3056 * @sector: Starting sector 3057 * @count: Total Range of request in logical sectors 3058 * 3059 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3060 * descriptor. 3061 * 3062 * Upto 64 entries of the format: 3063 * 63:48 Range Length 3064 * 47:0 LBA 3065 * 3066 * Range Length of 0 is ignored. 3067 * LBA's should be sorted order and not overlap. 3068 * 3069 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3070 * 3071 * Return: Number of bytes copied into sglist. 3072 */ 3073 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3074 u64 sector, u32 count) 3075 { 3076 struct scsi_device *sdp = cmd->device; 3077 size_t len = sdp->sector_size; 3078 size_t r; 3079 __le64 *buf; 3080 u32 i = 0; 3081 unsigned long flags; 3082 3083 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3084 3085 if (len > ATA_SCSI_RBUF_SIZE) 3086 len = ATA_SCSI_RBUF_SIZE; 3087 3088 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3089 buf = ((void *)ata_scsi_rbuf); 3090 memset(buf, 0, len); 3091 while (i < trmax) { 3092 u64 entry = sector | 3093 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3094 buf[i++] = __cpu_to_le64(entry); 3095 if (count <= 0xffff) 3096 break; 3097 count -= 0xffff; 3098 sector += 0xffff; 3099 } 3100 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3101 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3102 3103 return r; 3104 } 3105 3106 /** 3107 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3108 * @qc: Command to be translated 3109 * 3110 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3111 * an SCT Write Same command. 3112 * Based on WRITE SAME has the UNMAP flag: 3113 * 3114 * - When set translate to DSM TRIM 3115 * - When clear translate to SCT Write Same 3116 */ 3117 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3118 { 3119 struct ata_taskfile *tf = &qc->tf; 3120 struct scsi_cmnd *scmd = qc->scsicmd; 3121 struct scsi_device *sdp = scmd->device; 3122 size_t len = sdp->sector_size; 3123 struct ata_device *dev = qc->dev; 3124 const u8 *cdb = scmd->cmnd; 3125 u64 block; 3126 u32 n_block; 3127 const u32 trmax = len >> 3; 3128 u32 size; 3129 u16 fp; 3130 u8 bp = 0xff; 3131 u8 unmap = cdb[1] & 0x8; 3132 3133 /* we may not issue DMA commands if no DMA mode is set */ 3134 if (unlikely(!dev->dma_mode)) 3135 goto invalid_opcode; 3136 3137 /* 3138 * We only allow sending this command through the block layer, 3139 * as it modifies the DATA OUT buffer, which would corrupt user 3140 * memory for SG_IO commands. 3141 */ 3142 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3143 goto invalid_opcode; 3144 3145 if (unlikely(scmd->cmd_len < 16)) { 3146 fp = 15; 3147 goto invalid_fld; 3148 } 3149 scsi_16_lba_len(cdb, &block, &n_block); 3150 3151 if (!unmap || 3152 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3153 !ata_id_has_trim(dev->id)) { 3154 fp = 1; 3155 bp = 3; 3156 goto invalid_fld; 3157 } 3158 /* If the request is too large the cmd is invalid */ 3159 if (n_block > 0xffff * trmax) { 3160 fp = 2; 3161 goto invalid_fld; 3162 } 3163 3164 /* 3165 * WRITE SAME always has a sector sized buffer as payload, this 3166 * should never be a multiple entry S/G list. 3167 */ 3168 if (!scsi_sg_count(scmd)) 3169 goto invalid_param_len; 3170 3171 /* 3172 * size must match sector size in bytes 3173 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3174 * is defined as number of 512 byte blocks to be transferred. 3175 */ 3176 3177 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3178 if (size != len) 3179 goto invalid_param_len; 3180 3181 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3182 /* Newer devices support queued TRIM commands */ 3183 tf->protocol = ATA_PROT_NCQ; 3184 tf->command = ATA_CMD_FPDMA_SEND; 3185 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3186 tf->nsect = qc->hw_tag << 3; 3187 tf->hob_feature = (size / 512) >> 8; 3188 tf->feature = size / 512; 3189 3190 tf->auxiliary = 1; 3191 } else { 3192 tf->protocol = ATA_PROT_DMA; 3193 tf->hob_feature = 0; 3194 tf->feature = ATA_DSM_TRIM; 3195 tf->hob_nsect = (size / 512) >> 8; 3196 tf->nsect = size / 512; 3197 tf->command = ATA_CMD_DSM; 3198 } 3199 3200 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3201 ATA_TFLAG_WRITE; 3202 3203 ata_qc_set_pc_nbytes(qc); 3204 3205 return 0; 3206 3207 invalid_fld: 3208 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3209 return 1; 3210 invalid_param_len: 3211 /* "Parameter list length error" */ 3212 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3213 return 1; 3214 invalid_opcode: 3215 /* "Invalid command operation code" */ 3216 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3217 return 1; 3218 } 3219 3220 /** 3221 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3222 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3223 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3224 * 3225 * Yields a subset to satisfy scsi_report_opcode() 3226 * 3227 * LOCKING: 3228 * spin_lock_irqsave(host lock) 3229 */ 3230 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3231 { 3232 struct ata_device *dev = args->dev; 3233 u8 *cdb = args->cmd->cmnd; 3234 u8 supported = 0; 3235 unsigned int err = 0; 3236 3237 if (cdb[2] != 1) { 3238 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3239 err = 2; 3240 goto out; 3241 } 3242 switch (cdb[3]) { 3243 case INQUIRY: 3244 case MODE_SENSE: 3245 case MODE_SENSE_10: 3246 case READ_CAPACITY: 3247 case SERVICE_ACTION_IN_16: 3248 case REPORT_LUNS: 3249 case REQUEST_SENSE: 3250 case SYNCHRONIZE_CACHE: 3251 case REZERO_UNIT: 3252 case SEEK_6: 3253 case SEEK_10: 3254 case TEST_UNIT_READY: 3255 case SEND_DIAGNOSTIC: 3256 case MAINTENANCE_IN: 3257 case READ_6: 3258 case READ_10: 3259 case READ_16: 3260 case WRITE_6: 3261 case WRITE_10: 3262 case WRITE_16: 3263 case ATA_12: 3264 case ATA_16: 3265 case VERIFY: 3266 case VERIFY_16: 3267 case MODE_SELECT: 3268 case MODE_SELECT_10: 3269 case START_STOP: 3270 supported = 3; 3271 break; 3272 case ZBC_IN: 3273 case ZBC_OUT: 3274 if (ata_id_zoned_cap(dev->id) || 3275 dev->class == ATA_DEV_ZAC) 3276 supported = 3; 3277 break; 3278 case SECURITY_PROTOCOL_IN: 3279 case SECURITY_PROTOCOL_OUT: 3280 if (dev->flags & ATA_DFLAG_TRUSTED) 3281 supported = 3; 3282 break; 3283 default: 3284 break; 3285 } 3286 out: 3287 rbuf[1] = supported; /* supported */ 3288 return err; 3289 } 3290 3291 /** 3292 * ata_scsi_report_zones_complete - convert ATA output 3293 * @qc: command structure returning the data 3294 * 3295 * Convert T-13 little-endian field representation into 3296 * T-10 big-endian field representation. 3297 * What a mess. 3298 */ 3299 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3300 { 3301 struct scsi_cmnd *scmd = qc->scsicmd; 3302 struct sg_mapping_iter miter; 3303 unsigned long flags; 3304 unsigned int bytes = 0; 3305 3306 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3307 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3308 3309 local_irq_save(flags); 3310 while (sg_miter_next(&miter)) { 3311 unsigned int offset = 0; 3312 3313 if (bytes == 0) { 3314 char *hdr; 3315 u32 list_length; 3316 u64 max_lba, opt_lba; 3317 u16 same; 3318 3319 /* Swizzle header */ 3320 hdr = miter.addr; 3321 list_length = get_unaligned_le32(&hdr[0]); 3322 same = get_unaligned_le16(&hdr[4]); 3323 max_lba = get_unaligned_le64(&hdr[8]); 3324 opt_lba = get_unaligned_le64(&hdr[16]); 3325 put_unaligned_be32(list_length, &hdr[0]); 3326 hdr[4] = same & 0xf; 3327 put_unaligned_be64(max_lba, &hdr[8]); 3328 put_unaligned_be64(opt_lba, &hdr[16]); 3329 offset += 64; 3330 bytes += 64; 3331 } 3332 while (offset < miter.length) { 3333 char *rec; 3334 u8 cond, type, non_seq, reset; 3335 u64 size, start, wp; 3336 3337 /* Swizzle zone descriptor */ 3338 rec = miter.addr + offset; 3339 type = rec[0] & 0xf; 3340 cond = (rec[1] >> 4) & 0xf; 3341 non_seq = (rec[1] & 2); 3342 reset = (rec[1] & 1); 3343 size = get_unaligned_le64(&rec[8]); 3344 start = get_unaligned_le64(&rec[16]); 3345 wp = get_unaligned_le64(&rec[24]); 3346 rec[0] = type; 3347 rec[1] = (cond << 4) | non_seq | reset; 3348 put_unaligned_be64(size, &rec[8]); 3349 put_unaligned_be64(start, &rec[16]); 3350 put_unaligned_be64(wp, &rec[24]); 3351 WARN_ON(offset + 64 > miter.length); 3352 offset += 64; 3353 bytes += 64; 3354 } 3355 } 3356 sg_miter_stop(&miter); 3357 local_irq_restore(flags); 3358 3359 ata_scsi_qc_complete(qc); 3360 } 3361 3362 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3363 { 3364 struct ata_taskfile *tf = &qc->tf; 3365 struct scsi_cmnd *scmd = qc->scsicmd; 3366 const u8 *cdb = scmd->cmnd; 3367 u16 sect, fp = (u16)-1; 3368 u8 sa, options, bp = 0xff; 3369 u64 block; 3370 u32 n_block; 3371 3372 if (unlikely(scmd->cmd_len < 16)) { 3373 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3374 scmd->cmd_len); 3375 fp = 15; 3376 goto invalid_fld; 3377 } 3378 scsi_16_lba_len(cdb, &block, &n_block); 3379 if (n_block != scsi_bufflen(scmd)) { 3380 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3381 n_block, scsi_bufflen(scmd)); 3382 goto invalid_param_len; 3383 } 3384 sa = cdb[1] & 0x1f; 3385 if (sa != ZI_REPORT_ZONES) { 3386 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3387 fp = 1; 3388 goto invalid_fld; 3389 } 3390 /* 3391 * ZAC allows only for transfers in 512 byte blocks, 3392 * and uses a 16 bit value for the transfer count. 3393 */ 3394 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3395 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3396 goto invalid_param_len; 3397 } 3398 sect = n_block / 512; 3399 options = cdb[14] & 0xbf; 3400 3401 if (ata_ncq_enabled(qc->dev) && 3402 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3403 tf->protocol = ATA_PROT_NCQ; 3404 tf->command = ATA_CMD_FPDMA_RECV; 3405 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3406 tf->nsect = qc->hw_tag << 3; 3407 tf->feature = sect & 0xff; 3408 tf->hob_feature = (sect >> 8) & 0xff; 3409 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3410 } else { 3411 tf->command = ATA_CMD_ZAC_MGMT_IN; 3412 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3413 tf->protocol = ATA_PROT_DMA; 3414 tf->hob_feature = options; 3415 tf->hob_nsect = (sect >> 8) & 0xff; 3416 tf->nsect = sect & 0xff; 3417 } 3418 tf->device = ATA_LBA; 3419 tf->lbah = (block >> 16) & 0xff; 3420 tf->lbam = (block >> 8) & 0xff; 3421 tf->lbal = block & 0xff; 3422 tf->hob_lbah = (block >> 40) & 0xff; 3423 tf->hob_lbam = (block >> 32) & 0xff; 3424 tf->hob_lbal = (block >> 24) & 0xff; 3425 3426 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3427 qc->flags |= ATA_QCFLAG_RESULT_TF; 3428 3429 ata_qc_set_pc_nbytes(qc); 3430 3431 qc->complete_fn = ata_scsi_report_zones_complete; 3432 3433 return 0; 3434 3435 invalid_fld: 3436 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3437 return 1; 3438 3439 invalid_param_len: 3440 /* "Parameter list length error" */ 3441 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3442 return 1; 3443 } 3444 3445 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3446 { 3447 struct ata_taskfile *tf = &qc->tf; 3448 struct scsi_cmnd *scmd = qc->scsicmd; 3449 struct ata_device *dev = qc->dev; 3450 const u8 *cdb = scmd->cmnd; 3451 u8 all, sa; 3452 u64 block; 3453 u32 n_block; 3454 u16 fp = (u16)-1; 3455 3456 if (unlikely(scmd->cmd_len < 16)) { 3457 fp = 15; 3458 goto invalid_fld; 3459 } 3460 3461 sa = cdb[1] & 0x1f; 3462 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3463 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3464 fp = 1; 3465 goto invalid_fld; 3466 } 3467 3468 scsi_16_lba_len(cdb, &block, &n_block); 3469 if (n_block) { 3470 /* 3471 * ZAC MANAGEMENT OUT doesn't define any length 3472 */ 3473 goto invalid_param_len; 3474 } 3475 3476 all = cdb[14] & 0x1; 3477 if (all) { 3478 /* 3479 * Ignore the block address (zone ID) as defined by ZBC. 3480 */ 3481 block = 0; 3482 } else if (block >= dev->n_sectors) { 3483 /* 3484 * Block must be a valid zone ID (a zone start LBA). 3485 */ 3486 fp = 2; 3487 goto invalid_fld; 3488 } 3489 3490 if (ata_ncq_enabled(qc->dev) && 3491 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3492 tf->protocol = ATA_PROT_NCQ_NODATA; 3493 tf->command = ATA_CMD_NCQ_NON_DATA; 3494 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3495 tf->nsect = qc->hw_tag << 3; 3496 tf->auxiliary = sa | ((u16)all << 8); 3497 } else { 3498 tf->protocol = ATA_PROT_NODATA; 3499 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3500 tf->feature = sa; 3501 tf->hob_feature = all; 3502 } 3503 tf->lbah = (block >> 16) & 0xff; 3504 tf->lbam = (block >> 8) & 0xff; 3505 tf->lbal = block & 0xff; 3506 tf->hob_lbah = (block >> 40) & 0xff; 3507 tf->hob_lbam = (block >> 32) & 0xff; 3508 tf->hob_lbal = (block >> 24) & 0xff; 3509 tf->device = ATA_LBA; 3510 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3511 3512 return 0; 3513 3514 invalid_fld: 3515 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3516 return 1; 3517 invalid_param_len: 3518 /* "Parameter list length error" */ 3519 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3520 return 1; 3521 } 3522 3523 /** 3524 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3525 * @qc: Storage for translated ATA taskfile 3526 * @buf: input buffer 3527 * @len: number of valid bytes in the input buffer 3528 * @fp: out parameter for the failed field on error 3529 * 3530 * Prepare a taskfile to modify caching information for the device. 3531 * 3532 * LOCKING: 3533 * None. 3534 */ 3535 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3536 const u8 *buf, int len, u16 *fp) 3537 { 3538 struct ata_taskfile *tf = &qc->tf; 3539 struct ata_device *dev = qc->dev; 3540 u8 mpage[CACHE_MPAGE_LEN]; 3541 u8 wce; 3542 int i; 3543 3544 /* 3545 * The first two bytes of def_cache_mpage are a header, so offsets 3546 * in mpage are off by 2 compared to buf. Same for len. 3547 */ 3548 3549 if (len != CACHE_MPAGE_LEN - 2) { 3550 if (len < CACHE_MPAGE_LEN - 2) 3551 *fp = len; 3552 else 3553 *fp = CACHE_MPAGE_LEN - 2; 3554 return -EINVAL; 3555 } 3556 3557 wce = buf[0] & (1 << 2); 3558 3559 /* 3560 * Check that read-only bits are not modified. 3561 */ 3562 ata_msense_caching(dev->id, mpage, false); 3563 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3564 if (i == 0) 3565 continue; 3566 if (mpage[i + 2] != buf[i]) { 3567 *fp = i; 3568 return -EINVAL; 3569 } 3570 } 3571 3572 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3573 tf->protocol = ATA_PROT_NODATA; 3574 tf->nsect = 0; 3575 tf->command = ATA_CMD_SET_FEATURES; 3576 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3577 return 0; 3578 } 3579 3580 /** 3581 * ata_mselect_control - Simulate MODE SELECT for control page 3582 * @qc: Storage for translated ATA taskfile 3583 * @buf: input buffer 3584 * @len: number of valid bytes in the input buffer 3585 * @fp: out parameter for the failed field on error 3586 * 3587 * Prepare a taskfile to modify caching information for the device. 3588 * 3589 * LOCKING: 3590 * None. 3591 */ 3592 static int ata_mselect_control(struct ata_queued_cmd *qc, 3593 const u8 *buf, int len, u16 *fp) 3594 { 3595 struct ata_device *dev = qc->dev; 3596 u8 mpage[CONTROL_MPAGE_LEN]; 3597 u8 d_sense; 3598 int i; 3599 3600 /* 3601 * The first two bytes of def_control_mpage are a header, so offsets 3602 * in mpage are off by 2 compared to buf. Same for len. 3603 */ 3604 3605 if (len != CONTROL_MPAGE_LEN - 2) { 3606 if (len < CONTROL_MPAGE_LEN - 2) 3607 *fp = len; 3608 else 3609 *fp = CONTROL_MPAGE_LEN - 2; 3610 return -EINVAL; 3611 } 3612 3613 d_sense = buf[0] & (1 << 2); 3614 3615 /* 3616 * Check that read-only bits are not modified. 3617 */ 3618 ata_msense_control(dev, mpage, false); 3619 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3620 if (i == 0) 3621 continue; 3622 if (mpage[2 + i] != buf[i]) { 3623 *fp = i; 3624 return -EINVAL; 3625 } 3626 } 3627 if (d_sense & (1 << 2)) 3628 dev->flags |= ATA_DFLAG_D_SENSE; 3629 else 3630 dev->flags &= ~ATA_DFLAG_D_SENSE; 3631 return 0; 3632 } 3633 3634 /** 3635 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3636 * @qc: Storage for translated ATA taskfile 3637 * 3638 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3639 * Assume this is invoked for direct access devices (e.g. disks) only. 3640 * There should be no block descriptor for other device types. 3641 * 3642 * LOCKING: 3643 * spin_lock_irqsave(host lock) 3644 */ 3645 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3646 { 3647 struct scsi_cmnd *scmd = qc->scsicmd; 3648 const u8 *cdb = scmd->cmnd; 3649 u8 pg, spg; 3650 unsigned six_byte, pg_len, hdr_len, bd_len; 3651 int len; 3652 u16 fp = (u16)-1; 3653 u8 bp = 0xff; 3654 u8 buffer[64]; 3655 const u8 *p = buffer; 3656 3657 VPRINTK("ENTER\n"); 3658 3659 six_byte = (cdb[0] == MODE_SELECT); 3660 if (six_byte) { 3661 if (scmd->cmd_len < 5) { 3662 fp = 4; 3663 goto invalid_fld; 3664 } 3665 3666 len = cdb[4]; 3667 hdr_len = 4; 3668 } else { 3669 if (scmd->cmd_len < 9) { 3670 fp = 8; 3671 goto invalid_fld; 3672 } 3673 3674 len = (cdb[7] << 8) + cdb[8]; 3675 hdr_len = 8; 3676 } 3677 3678 /* We only support PF=1, SP=0. */ 3679 if ((cdb[1] & 0x11) != 0x10) { 3680 fp = 1; 3681 bp = (cdb[1] & 0x01) ? 1 : 5; 3682 goto invalid_fld; 3683 } 3684 3685 /* Test early for possible overrun. */ 3686 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3687 goto invalid_param_len; 3688 3689 /* Move past header and block descriptors. */ 3690 if (len < hdr_len) 3691 goto invalid_param_len; 3692 3693 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3694 buffer, sizeof(buffer))) 3695 goto invalid_param_len; 3696 3697 if (six_byte) 3698 bd_len = p[3]; 3699 else 3700 bd_len = (p[6] << 8) + p[7]; 3701 3702 len -= hdr_len; 3703 p += hdr_len; 3704 if (len < bd_len) 3705 goto invalid_param_len; 3706 if (bd_len != 0 && bd_len != 8) { 3707 fp = (six_byte) ? 3 : 6; 3708 fp += bd_len + hdr_len; 3709 goto invalid_param; 3710 } 3711 3712 len -= bd_len; 3713 p += bd_len; 3714 if (len == 0) 3715 goto skip; 3716 3717 /* Parse both possible formats for the mode page headers. */ 3718 pg = p[0] & 0x3f; 3719 if (p[0] & 0x40) { 3720 if (len < 4) 3721 goto invalid_param_len; 3722 3723 spg = p[1]; 3724 pg_len = (p[2] << 8) | p[3]; 3725 p += 4; 3726 len -= 4; 3727 } else { 3728 if (len < 2) 3729 goto invalid_param_len; 3730 3731 spg = 0; 3732 pg_len = p[1]; 3733 p += 2; 3734 len -= 2; 3735 } 3736 3737 /* 3738 * No mode subpages supported (yet) but asking for _all_ 3739 * subpages may be valid 3740 */ 3741 if (spg && (spg != ALL_SUB_MPAGES)) { 3742 fp = (p[0] & 0x40) ? 1 : 0; 3743 fp += hdr_len + bd_len; 3744 goto invalid_param; 3745 } 3746 if (pg_len > len) 3747 goto invalid_param_len; 3748 3749 switch (pg) { 3750 case CACHE_MPAGE: 3751 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3752 fp += hdr_len + bd_len; 3753 goto invalid_param; 3754 } 3755 break; 3756 case CONTROL_MPAGE: 3757 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 3758 fp += hdr_len + bd_len; 3759 goto invalid_param; 3760 } else { 3761 goto skip; /* No ATA command to send */ 3762 } 3763 break; 3764 default: /* invalid page code */ 3765 fp = bd_len + hdr_len; 3766 goto invalid_param; 3767 } 3768 3769 /* 3770 * Only one page has changeable data, so we only support setting one 3771 * page at a time. 3772 */ 3773 if (len > pg_len) 3774 goto invalid_param; 3775 3776 return 0; 3777 3778 invalid_fld: 3779 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3780 return 1; 3781 3782 invalid_param: 3783 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3784 return 1; 3785 3786 invalid_param_len: 3787 /* "Parameter list length error" */ 3788 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3789 return 1; 3790 3791 skip: 3792 scmd->result = SAM_STAT_GOOD; 3793 return 1; 3794 } 3795 3796 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3797 { 3798 if (len == 0) 3799 return ATA_CMD_TRUSTED_NONDATA; 3800 else if (send) 3801 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 3802 else 3803 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 3804 } 3805 3806 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 3807 { 3808 struct scsi_cmnd *scmd = qc->scsicmd; 3809 const u8 *cdb = scmd->cmnd; 3810 struct ata_taskfile *tf = &qc->tf; 3811 u8 secp = cdb[1]; 3812 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 3813 u16 spsp = get_unaligned_be16(&cdb[2]); 3814 u32 len = get_unaligned_be32(&cdb[6]); 3815 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 3816 3817 /* 3818 * We don't support the ATA "security" protocol. 3819 */ 3820 if (secp == 0xef) { 3821 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 3822 return 1; 3823 } 3824 3825 if (cdb[4] & 7) { /* INC_512 */ 3826 if (len > 0xffff) { 3827 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3828 return 1; 3829 } 3830 } else { 3831 if (len > 0x01fffe00) { 3832 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3833 return 1; 3834 } 3835 3836 /* convert to the sector-based ATA addressing */ 3837 len = (len + 511) / 512; 3838 } 3839 3840 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 3841 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 3842 if (send) 3843 tf->flags |= ATA_TFLAG_WRITE; 3844 tf->command = ata_scsi_trusted_op(len, send, dma); 3845 tf->feature = secp; 3846 tf->lbam = spsp & 0xff; 3847 tf->lbah = spsp >> 8; 3848 3849 if (len) { 3850 tf->nsect = len & 0xff; 3851 tf->lbal = len >> 8; 3852 } else { 3853 if (!send) 3854 tf->lbah = (1 << 7); 3855 } 3856 3857 ata_qc_set_pc_nbytes(qc); 3858 return 0; 3859 } 3860 3861 /** 3862 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 3863 * @qc: Command to be translated 3864 * 3865 * Translate a SCSI variable length CDB to specified commands. 3866 * It checks a service action value in CDB to call corresponding handler. 3867 * 3868 * RETURNS: 3869 * Zero on success, non-zero on failure 3870 * 3871 */ 3872 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 3873 { 3874 struct scsi_cmnd *scmd = qc->scsicmd; 3875 const u8 *cdb = scmd->cmnd; 3876 const u16 sa = get_unaligned_be16(&cdb[8]); 3877 3878 /* 3879 * if service action represents a ata pass-thru(32) command, 3880 * then pass it to ata_scsi_pass_thru handler. 3881 */ 3882 if (sa == ATA_32) 3883 return ata_scsi_pass_thru(qc); 3884 3885 /* unsupported service action */ 3886 return 1; 3887 } 3888 3889 /** 3890 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3891 * @dev: ATA device 3892 * @cmd: SCSI command opcode to consider 3893 * 3894 * Look up the SCSI command given, and determine whether the 3895 * SCSI command is to be translated or simulated. 3896 * 3897 * RETURNS: 3898 * Pointer to translation function if possible, %NULL if not. 3899 */ 3900 3901 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3902 { 3903 switch (cmd) { 3904 case READ_6: 3905 case READ_10: 3906 case READ_16: 3907 3908 case WRITE_6: 3909 case WRITE_10: 3910 case WRITE_16: 3911 return ata_scsi_rw_xlat; 3912 3913 case WRITE_SAME_16: 3914 return ata_scsi_write_same_xlat; 3915 3916 case SYNCHRONIZE_CACHE: 3917 if (ata_try_flush_cache(dev)) 3918 return ata_scsi_flush_xlat; 3919 break; 3920 3921 case VERIFY: 3922 case VERIFY_16: 3923 return ata_scsi_verify_xlat; 3924 3925 case ATA_12: 3926 case ATA_16: 3927 return ata_scsi_pass_thru; 3928 3929 case VARIABLE_LENGTH_CMD: 3930 return ata_scsi_var_len_cdb_xlat; 3931 3932 case MODE_SELECT: 3933 case MODE_SELECT_10: 3934 return ata_scsi_mode_select_xlat; 3935 break; 3936 3937 case ZBC_IN: 3938 return ata_scsi_zbc_in_xlat; 3939 3940 case ZBC_OUT: 3941 return ata_scsi_zbc_out_xlat; 3942 3943 case SECURITY_PROTOCOL_IN: 3944 case SECURITY_PROTOCOL_OUT: 3945 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 3946 break; 3947 return ata_scsi_security_inout_xlat; 3948 3949 case START_STOP: 3950 return ata_scsi_start_stop_xlat; 3951 } 3952 3953 return NULL; 3954 } 3955 3956 /** 3957 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 3958 * @ap: ATA port to which the command was being sent 3959 * @cmd: SCSI command to dump 3960 * 3961 * Prints the contents of a SCSI command via printk(). 3962 */ 3963 3964 void ata_scsi_dump_cdb(struct ata_port *ap, struct scsi_cmnd *cmd) 3965 { 3966 #ifdef ATA_VERBOSE_DEBUG 3967 struct scsi_device *scsidev = cmd->device; 3968 3969 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n", 3970 ap->print_id, 3971 scsidev->channel, scsidev->id, scsidev->lun, 3972 cmd->cmnd); 3973 #endif 3974 } 3975 3976 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 3977 { 3978 u8 scsi_op = scmd->cmnd[0]; 3979 ata_xlat_func_t xlat_func; 3980 int rc = 0; 3981 3982 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 3983 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 3984 goto bad_cdb_len; 3985 3986 xlat_func = ata_get_xlat_func(dev, scsi_op); 3987 } else { 3988 if (unlikely(!scmd->cmd_len)) 3989 goto bad_cdb_len; 3990 3991 xlat_func = NULL; 3992 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3993 /* relay SCSI command to ATAPI device */ 3994 int len = COMMAND_SIZE(scsi_op); 3995 if (unlikely(len > scmd->cmd_len || 3996 len > dev->cdb_len || 3997 scmd->cmd_len > ATAPI_CDB_LEN)) 3998 goto bad_cdb_len; 3999 4000 xlat_func = atapi_xlat; 4001 } else { 4002 /* ATA_16 passthru, treat as an ATA command */ 4003 if (unlikely(scmd->cmd_len > 16)) 4004 goto bad_cdb_len; 4005 4006 xlat_func = ata_get_xlat_func(dev, scsi_op); 4007 } 4008 } 4009 4010 if (xlat_func) 4011 rc = ata_scsi_translate(dev, scmd, xlat_func); 4012 else 4013 ata_scsi_simulate(dev, scmd); 4014 4015 return rc; 4016 4017 bad_cdb_len: 4018 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4019 scmd->cmd_len, scsi_op, dev->cdb_len); 4020 scmd->result = DID_ERROR << 16; 4021 scmd->scsi_done(scmd); 4022 return 0; 4023 } 4024 4025 /** 4026 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4027 * @shost: SCSI host of command to be sent 4028 * @cmd: SCSI command to be sent 4029 * 4030 * In some cases, this function translates SCSI commands into 4031 * ATA taskfiles, and queues the taskfiles to be sent to 4032 * hardware. In other cases, this function simulates a 4033 * SCSI device by evaluating and responding to certain 4034 * SCSI commands. This creates the overall effect of 4035 * ATA and ATAPI devices appearing as SCSI devices. 4036 * 4037 * LOCKING: 4038 * ATA host lock 4039 * 4040 * RETURNS: 4041 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4042 * 0 otherwise. 4043 */ 4044 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4045 { 4046 struct ata_port *ap; 4047 struct ata_device *dev; 4048 struct scsi_device *scsidev = cmd->device; 4049 int rc = 0; 4050 unsigned long irq_flags; 4051 4052 ap = ata_shost_to_port(shost); 4053 4054 spin_lock_irqsave(ap->lock, irq_flags); 4055 4056 ata_scsi_dump_cdb(ap, cmd); 4057 4058 dev = ata_scsi_find_dev(ap, scsidev); 4059 if (likely(dev)) 4060 rc = __ata_scsi_queuecmd(cmd, dev); 4061 else { 4062 cmd->result = (DID_BAD_TARGET << 16); 4063 cmd->scsi_done(cmd); 4064 } 4065 4066 spin_unlock_irqrestore(ap->lock, irq_flags); 4067 4068 return rc; 4069 } 4070 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4071 4072 /** 4073 * ata_scsi_simulate - simulate SCSI command on ATA device 4074 * @dev: the target device 4075 * @cmd: SCSI command being sent to device. 4076 * 4077 * Interprets and directly executes a select list of SCSI commands 4078 * that can be handled internally. 4079 * 4080 * LOCKING: 4081 * spin_lock_irqsave(host lock) 4082 */ 4083 4084 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4085 { 4086 struct ata_scsi_args args; 4087 const u8 *scsicmd = cmd->cmnd; 4088 u8 tmp8; 4089 4090 args.dev = dev; 4091 args.id = dev->id; 4092 args.cmd = cmd; 4093 4094 switch(scsicmd[0]) { 4095 case INQUIRY: 4096 if (scsicmd[1] & 2) /* is CmdDt set? */ 4097 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4098 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4099 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4100 else switch (scsicmd[2]) { 4101 case 0x00: 4102 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4103 break; 4104 case 0x80: 4105 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4106 break; 4107 case 0x83: 4108 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4109 break; 4110 case 0x89: 4111 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4112 break; 4113 case 0xb0: 4114 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4115 break; 4116 case 0xb1: 4117 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4118 break; 4119 case 0xb2: 4120 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4121 break; 4122 case 0xb6: 4123 if (dev->flags & ATA_DFLAG_ZAC) { 4124 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4125 break; 4126 } 4127 fallthrough; 4128 default: 4129 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4130 break; 4131 } 4132 break; 4133 4134 case MODE_SENSE: 4135 case MODE_SENSE_10: 4136 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4137 break; 4138 4139 case READ_CAPACITY: 4140 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4141 break; 4142 4143 case SERVICE_ACTION_IN_16: 4144 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4145 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4146 else 4147 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4148 break; 4149 4150 case REPORT_LUNS: 4151 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4152 break; 4153 4154 case REQUEST_SENSE: 4155 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4156 break; 4157 4158 /* if we reach this, then writeback caching is disabled, 4159 * turning this into a no-op. 4160 */ 4161 case SYNCHRONIZE_CACHE: 4162 fallthrough; 4163 4164 /* no-op's, complete with success */ 4165 case REZERO_UNIT: 4166 case SEEK_6: 4167 case SEEK_10: 4168 case TEST_UNIT_READY: 4169 break; 4170 4171 case SEND_DIAGNOSTIC: 4172 tmp8 = scsicmd[1] & ~(1 << 3); 4173 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4174 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4175 break; 4176 4177 case MAINTENANCE_IN: 4178 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4179 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4180 else 4181 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4182 break; 4183 4184 /* all other commands */ 4185 default: 4186 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4187 /* "Invalid command operation code" */ 4188 break; 4189 } 4190 4191 cmd->scsi_done(cmd); 4192 } 4193 4194 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4195 { 4196 int i, rc; 4197 4198 for (i = 0; i < host->n_ports; i++) { 4199 struct ata_port *ap = host->ports[i]; 4200 struct Scsi_Host *shost; 4201 4202 rc = -ENOMEM; 4203 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4204 if (!shost) 4205 goto err_alloc; 4206 4207 shost->eh_noresume = 1; 4208 *(struct ata_port **)&shost->hostdata[0] = ap; 4209 ap->scsi_host = shost; 4210 4211 shost->transportt = ata_scsi_transport_template; 4212 shost->unique_id = ap->print_id; 4213 shost->max_id = 16; 4214 shost->max_lun = 1; 4215 shost->max_channel = 1; 4216 shost->max_cmd_len = 32; 4217 4218 /* Schedule policy is determined by ->qc_defer() 4219 * callback and it needs to see every deferred qc. 4220 * Set host_blocked to 1 to prevent SCSI midlayer from 4221 * automatically deferring requests. 4222 */ 4223 shost->max_host_blocked = 1; 4224 4225 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4226 if (rc) 4227 goto err_alloc; 4228 } 4229 4230 return 0; 4231 4232 err_alloc: 4233 while (--i >= 0) { 4234 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4235 4236 /* scsi_host_put() is in ata_devres_release() */ 4237 scsi_remove_host(shost); 4238 } 4239 return rc; 4240 } 4241 4242 #ifdef CONFIG_OF 4243 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4244 { 4245 struct scsi_device *sdev = dev->sdev; 4246 struct device *d = ap->host->dev; 4247 struct device_node *np = d->of_node; 4248 struct device_node *child; 4249 4250 for_each_available_child_of_node(np, child) { 4251 int ret; 4252 u32 val; 4253 4254 ret = of_property_read_u32(child, "reg", &val); 4255 if (ret) 4256 continue; 4257 if (val == dev->devno) { 4258 dev_dbg(d, "found matching device node\n"); 4259 sdev->sdev_gendev.of_node = child; 4260 return; 4261 } 4262 } 4263 } 4264 #else 4265 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4266 { 4267 } 4268 #endif 4269 4270 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4271 { 4272 int tries = 5; 4273 struct ata_device *last_failed_dev = NULL; 4274 struct ata_link *link; 4275 struct ata_device *dev; 4276 4277 repeat: 4278 ata_for_each_link(link, ap, EDGE) { 4279 ata_for_each_dev(dev, link, ENABLED) { 4280 struct scsi_device *sdev; 4281 int channel = 0, id = 0; 4282 4283 if (dev->sdev) 4284 continue; 4285 4286 if (ata_is_host_link(link)) 4287 id = dev->devno; 4288 else 4289 channel = link->pmp; 4290 4291 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4292 NULL); 4293 if (!IS_ERR(sdev)) { 4294 dev->sdev = sdev; 4295 ata_scsi_assign_ofnode(dev, ap); 4296 scsi_device_put(sdev); 4297 } else { 4298 dev->sdev = NULL; 4299 } 4300 } 4301 } 4302 4303 /* If we scanned while EH was in progress or allocation 4304 * failure occurred, scan would have failed silently. Check 4305 * whether all devices are attached. 4306 */ 4307 ata_for_each_link(link, ap, EDGE) { 4308 ata_for_each_dev(dev, link, ENABLED) { 4309 if (!dev->sdev) 4310 goto exit_loop; 4311 } 4312 } 4313 exit_loop: 4314 if (!link) 4315 return; 4316 4317 /* we're missing some SCSI devices */ 4318 if (sync) { 4319 /* If caller requested synchrnous scan && we've made 4320 * any progress, sleep briefly and repeat. 4321 */ 4322 if (dev != last_failed_dev) { 4323 msleep(100); 4324 last_failed_dev = dev; 4325 goto repeat; 4326 } 4327 4328 /* We might be failing to detect boot device, give it 4329 * a few more chances. 4330 */ 4331 if (--tries) { 4332 msleep(100); 4333 goto repeat; 4334 } 4335 4336 ata_port_err(ap, 4337 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4338 } 4339 4340 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4341 round_jiffies_relative(HZ)); 4342 } 4343 4344 /** 4345 * ata_scsi_offline_dev - offline attached SCSI device 4346 * @dev: ATA device to offline attached SCSI device for 4347 * 4348 * This function is called from ata_eh_hotplug() and responsible 4349 * for taking the SCSI device attached to @dev offline. This 4350 * function is called with host lock which protects dev->sdev 4351 * against clearing. 4352 * 4353 * LOCKING: 4354 * spin_lock_irqsave(host lock) 4355 * 4356 * RETURNS: 4357 * 1 if attached SCSI device exists, 0 otherwise. 4358 */ 4359 int ata_scsi_offline_dev(struct ata_device *dev) 4360 { 4361 if (dev->sdev) { 4362 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4363 return 1; 4364 } 4365 return 0; 4366 } 4367 4368 /** 4369 * ata_scsi_remove_dev - remove attached SCSI device 4370 * @dev: ATA device to remove attached SCSI device for 4371 * 4372 * This function is called from ata_eh_scsi_hotplug() and 4373 * responsible for removing the SCSI device attached to @dev. 4374 * 4375 * LOCKING: 4376 * Kernel thread context (may sleep). 4377 */ 4378 static void ata_scsi_remove_dev(struct ata_device *dev) 4379 { 4380 struct ata_port *ap = dev->link->ap; 4381 struct scsi_device *sdev; 4382 unsigned long flags; 4383 4384 /* Alas, we need to grab scan_mutex to ensure SCSI device 4385 * state doesn't change underneath us and thus 4386 * scsi_device_get() always succeeds. The mutex locking can 4387 * be removed if there is __scsi_device_get() interface which 4388 * increments reference counts regardless of device state. 4389 */ 4390 mutex_lock(&ap->scsi_host->scan_mutex); 4391 spin_lock_irqsave(ap->lock, flags); 4392 4393 /* clearing dev->sdev is protected by host lock */ 4394 sdev = dev->sdev; 4395 dev->sdev = NULL; 4396 4397 if (sdev) { 4398 /* If user initiated unplug races with us, sdev can go 4399 * away underneath us after the host lock and 4400 * scan_mutex are released. Hold onto it. 4401 */ 4402 if (scsi_device_get(sdev) == 0) { 4403 /* The following ensures the attached sdev is 4404 * offline on return from ata_scsi_offline_dev() 4405 * regardless it wins or loses the race 4406 * against this function. 4407 */ 4408 scsi_device_set_state(sdev, SDEV_OFFLINE); 4409 } else { 4410 WARN_ON(1); 4411 sdev = NULL; 4412 } 4413 } 4414 4415 spin_unlock_irqrestore(ap->lock, flags); 4416 mutex_unlock(&ap->scsi_host->scan_mutex); 4417 4418 if (sdev) { 4419 ata_dev_info(dev, "detaching (SCSI %s)\n", 4420 dev_name(&sdev->sdev_gendev)); 4421 4422 scsi_remove_device(sdev); 4423 scsi_device_put(sdev); 4424 } 4425 } 4426 4427 static void ata_scsi_handle_link_detach(struct ata_link *link) 4428 { 4429 struct ata_port *ap = link->ap; 4430 struct ata_device *dev; 4431 4432 ata_for_each_dev(dev, link, ALL) { 4433 unsigned long flags; 4434 4435 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4436 continue; 4437 4438 spin_lock_irqsave(ap->lock, flags); 4439 dev->flags &= ~ATA_DFLAG_DETACHED; 4440 spin_unlock_irqrestore(ap->lock, flags); 4441 4442 if (zpodd_dev_enabled(dev)) 4443 zpodd_exit(dev); 4444 4445 ata_scsi_remove_dev(dev); 4446 } 4447 } 4448 4449 /** 4450 * ata_scsi_media_change_notify - send media change event 4451 * @dev: Pointer to the disk device with media change event 4452 * 4453 * Tell the block layer to send a media change notification 4454 * event. 4455 * 4456 * LOCKING: 4457 * spin_lock_irqsave(host lock) 4458 */ 4459 void ata_scsi_media_change_notify(struct ata_device *dev) 4460 { 4461 if (dev->sdev) 4462 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4463 GFP_ATOMIC); 4464 } 4465 4466 /** 4467 * ata_scsi_hotplug - SCSI part of hotplug 4468 * @work: Pointer to ATA port to perform SCSI hotplug on 4469 * 4470 * Perform SCSI part of hotplug. It's executed from a separate 4471 * workqueue after EH completes. This is necessary because SCSI 4472 * hot plugging requires working EH and hot unplugging is 4473 * synchronized with hot plugging with a mutex. 4474 * 4475 * LOCKING: 4476 * Kernel thread context (may sleep). 4477 */ 4478 void ata_scsi_hotplug(struct work_struct *work) 4479 { 4480 struct ata_port *ap = 4481 container_of(work, struct ata_port, hotplug_task.work); 4482 int i; 4483 4484 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4485 DPRINTK("ENTER/EXIT - unloading\n"); 4486 return; 4487 } 4488 4489 DPRINTK("ENTER\n"); 4490 mutex_lock(&ap->scsi_scan_mutex); 4491 4492 /* Unplug detached devices. We cannot use link iterator here 4493 * because PMP links have to be scanned even if PMP is 4494 * currently not attached. Iterate manually. 4495 */ 4496 ata_scsi_handle_link_detach(&ap->link); 4497 if (ap->pmp_link) 4498 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4499 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4500 4501 /* scan for new ones */ 4502 ata_scsi_scan_host(ap, 0); 4503 4504 mutex_unlock(&ap->scsi_scan_mutex); 4505 DPRINTK("EXIT\n"); 4506 } 4507 4508 /** 4509 * ata_scsi_user_scan - indication for user-initiated bus scan 4510 * @shost: SCSI host to scan 4511 * @channel: Channel to scan 4512 * @id: ID to scan 4513 * @lun: LUN to scan 4514 * 4515 * This function is called when user explicitly requests bus 4516 * scan. Set probe pending flag and invoke EH. 4517 * 4518 * LOCKING: 4519 * SCSI layer (we don't care) 4520 * 4521 * RETURNS: 4522 * Zero. 4523 */ 4524 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4525 unsigned int id, u64 lun) 4526 { 4527 struct ata_port *ap = ata_shost_to_port(shost); 4528 unsigned long flags; 4529 int devno, rc = 0; 4530 4531 if (!ap->ops->error_handler) 4532 return -EOPNOTSUPP; 4533 4534 if (lun != SCAN_WILD_CARD && lun) 4535 return -EINVAL; 4536 4537 if (!sata_pmp_attached(ap)) { 4538 if (channel != SCAN_WILD_CARD && channel) 4539 return -EINVAL; 4540 devno = id; 4541 } else { 4542 if (id != SCAN_WILD_CARD && id) 4543 return -EINVAL; 4544 devno = channel; 4545 } 4546 4547 spin_lock_irqsave(ap->lock, flags); 4548 4549 if (devno == SCAN_WILD_CARD) { 4550 struct ata_link *link; 4551 4552 ata_for_each_link(link, ap, EDGE) { 4553 struct ata_eh_info *ehi = &link->eh_info; 4554 ehi->probe_mask |= ATA_ALL_DEVICES; 4555 ehi->action |= ATA_EH_RESET; 4556 } 4557 } else { 4558 struct ata_device *dev = ata_find_dev(ap, devno); 4559 4560 if (dev) { 4561 struct ata_eh_info *ehi = &dev->link->eh_info; 4562 ehi->probe_mask |= 1 << dev->devno; 4563 ehi->action |= ATA_EH_RESET; 4564 } else 4565 rc = -EINVAL; 4566 } 4567 4568 if (rc == 0) { 4569 ata_port_schedule_eh(ap); 4570 spin_unlock_irqrestore(ap->lock, flags); 4571 ata_port_wait_eh(ap); 4572 } else 4573 spin_unlock_irqrestore(ap->lock, flags); 4574 4575 return rc; 4576 } 4577 4578 /** 4579 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4580 * @work: Pointer to ATA port to perform scsi_rescan_device() 4581 * 4582 * After ATA pass thru (SAT) commands are executed successfully, 4583 * libata need to propagate the changes to SCSI layer. 4584 * 4585 * LOCKING: 4586 * Kernel thread context (may sleep). 4587 */ 4588 void ata_scsi_dev_rescan(struct work_struct *work) 4589 { 4590 struct ata_port *ap = 4591 container_of(work, struct ata_port, scsi_rescan_task); 4592 struct ata_link *link; 4593 struct ata_device *dev; 4594 unsigned long flags; 4595 4596 mutex_lock(&ap->scsi_scan_mutex); 4597 spin_lock_irqsave(ap->lock, flags); 4598 4599 ata_for_each_link(link, ap, EDGE) { 4600 ata_for_each_dev(dev, link, ENABLED) { 4601 struct scsi_device *sdev = dev->sdev; 4602 4603 if (!sdev) 4604 continue; 4605 if (scsi_device_get(sdev)) 4606 continue; 4607 4608 spin_unlock_irqrestore(ap->lock, flags); 4609 scsi_rescan_device(&(sdev->sdev_gendev)); 4610 scsi_device_put(sdev); 4611 spin_lock_irqsave(ap->lock, flags); 4612 } 4613 } 4614 4615 spin_unlock_irqrestore(ap->lock, flags); 4616 mutex_unlock(&ap->scsi_scan_mutex); 4617 } 4618