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 static struct attribute *ata_common_sdev_attrs[] = { 238 &dev_attr_unload_heads.attr, 239 NULL 240 }; 241 242 static const struct attribute_group ata_common_sdev_attr_group = { 243 .attrs = ata_common_sdev_attrs 244 }; 245 246 const struct attribute_group *ata_common_sdev_groups[] = { 247 &ata_common_sdev_attr_group, 248 NULL 249 }; 250 EXPORT_SYMBOL_GPL(ata_common_sdev_groups); 251 252 /** 253 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 254 * @sdev: SCSI device for which BIOS geometry is to be determined 255 * @bdev: block device associated with @sdev 256 * @capacity: capacity of SCSI device 257 * @geom: location to which geometry will be output 258 * 259 * Generic bios head/sector/cylinder calculator 260 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 261 * mapping. Some situations may arise where the disk is not 262 * bootable if this is not used. 263 * 264 * LOCKING: 265 * Defined by the SCSI layer. We don't really care. 266 * 267 * RETURNS: 268 * Zero. 269 */ 270 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 271 sector_t capacity, int geom[]) 272 { 273 geom[0] = 255; 274 geom[1] = 63; 275 sector_div(capacity, 255*63); 276 geom[2] = capacity; 277 278 return 0; 279 } 280 EXPORT_SYMBOL_GPL(ata_std_bios_param); 281 282 /** 283 * ata_scsi_unlock_native_capacity - unlock native capacity 284 * @sdev: SCSI device to adjust device capacity for 285 * 286 * This function is called if a partition on @sdev extends beyond 287 * the end of the device. It requests EH to unlock HPA. 288 * 289 * LOCKING: 290 * Defined by the SCSI layer. Might sleep. 291 */ 292 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 293 { 294 struct ata_port *ap = ata_shost_to_port(sdev->host); 295 struct ata_device *dev; 296 unsigned long flags; 297 298 spin_lock_irqsave(ap->lock, flags); 299 300 dev = ata_scsi_find_dev(ap, sdev); 301 if (dev && dev->n_sectors < dev->n_native_sectors) { 302 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 303 dev->link->eh_info.action |= ATA_EH_RESET; 304 ata_port_schedule_eh(ap); 305 } 306 307 spin_unlock_irqrestore(ap->lock, flags); 308 ata_port_wait_eh(ap); 309 } 310 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 311 312 /** 313 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 314 * @ap: target port 315 * @sdev: SCSI device to get identify data for 316 * @arg: User buffer area for identify data 317 * 318 * LOCKING: 319 * Defined by the SCSI layer. We don't really care. 320 * 321 * RETURNS: 322 * Zero on success, negative errno on error. 323 */ 324 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 325 void __user *arg) 326 { 327 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 328 u16 __user *dst = arg; 329 char buf[40]; 330 331 if (!dev) 332 return -ENOMSG; 333 334 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 335 return -EFAULT; 336 337 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 338 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 339 return -EFAULT; 340 341 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 342 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 343 return -EFAULT; 344 345 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 346 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 347 return -EFAULT; 348 349 return 0; 350 } 351 352 /** 353 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 354 * @scsidev: Device to which we are issuing command 355 * @arg: User provided data for issuing command 356 * 357 * LOCKING: 358 * Defined by the SCSI layer. We don't really care. 359 * 360 * RETURNS: 361 * Zero on success, negative errno on error. 362 */ 363 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 364 { 365 int rc = 0; 366 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 367 u8 scsi_cmd[MAX_COMMAND_SIZE]; 368 u8 args[4], *argbuf = NULL; 369 int argsize = 0; 370 enum dma_data_direction data_dir; 371 struct scsi_sense_hdr sshdr; 372 int cmd_result; 373 374 if (arg == NULL) 375 return -EINVAL; 376 377 if (copy_from_user(args, arg, sizeof(args))) 378 return -EFAULT; 379 380 memset(sensebuf, 0, sizeof(sensebuf)); 381 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 382 383 if (args[3]) { 384 argsize = ATA_SECT_SIZE * args[3]; 385 argbuf = kmalloc(argsize, GFP_KERNEL); 386 if (argbuf == NULL) { 387 rc = -ENOMEM; 388 goto error; 389 } 390 391 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 392 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 393 block count in sector count field */ 394 data_dir = DMA_FROM_DEVICE; 395 } else { 396 scsi_cmd[1] = (3 << 1); /* Non-data */ 397 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 398 data_dir = DMA_NONE; 399 } 400 401 scsi_cmd[0] = ATA_16; 402 403 scsi_cmd[4] = args[2]; 404 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 405 scsi_cmd[6] = args[3]; 406 scsi_cmd[8] = args[1]; 407 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 408 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 409 } else { 410 scsi_cmd[6] = args[1]; 411 } 412 scsi_cmd[14] = args[0]; 413 414 /* Good values for timeout and retries? Values below 415 from scsi_ioctl_send_command() for default case... */ 416 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 417 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 418 419 if (cmd_result < 0) { 420 rc = cmd_result; 421 goto error; 422 } 423 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 424 u8 *desc = sensebuf + 8; 425 426 /* If we set cc then ATA pass-through will cause a 427 * check condition even if no error. Filter that. */ 428 if (scsi_status_is_check_condition(cmd_result)) { 429 if (sshdr.sense_key == RECOVERED_ERROR && 430 sshdr.asc == 0 && sshdr.ascq == 0x1d) 431 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 432 } 433 434 /* Send userspace a few ATA registers (same as drivers/ide) */ 435 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 436 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 437 args[0] = desc[13]; /* status */ 438 args[1] = desc[3]; /* error */ 439 args[2] = desc[5]; /* sector count (0:7) */ 440 if (copy_to_user(arg, args, sizeof(args))) 441 rc = -EFAULT; 442 } 443 } 444 445 446 if (cmd_result) { 447 rc = -EIO; 448 goto error; 449 } 450 451 if ((argbuf) 452 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 453 rc = -EFAULT; 454 error: 455 kfree(argbuf); 456 return rc; 457 } 458 459 /** 460 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 461 * @scsidev: Device to which we are issuing command 462 * @arg: User provided data for issuing command 463 * 464 * LOCKING: 465 * Defined by the SCSI layer. We don't really care. 466 * 467 * RETURNS: 468 * Zero on success, negative errno on error. 469 */ 470 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 471 { 472 int rc = 0; 473 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 474 u8 scsi_cmd[MAX_COMMAND_SIZE]; 475 u8 args[7]; 476 struct scsi_sense_hdr sshdr; 477 int cmd_result; 478 479 if (arg == NULL) 480 return -EINVAL; 481 482 if (copy_from_user(args, arg, sizeof(args))) 483 return -EFAULT; 484 485 memset(sensebuf, 0, sizeof(sensebuf)); 486 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 487 scsi_cmd[0] = ATA_16; 488 scsi_cmd[1] = (3 << 1); /* Non-data */ 489 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 490 scsi_cmd[4] = args[1]; 491 scsi_cmd[6] = args[2]; 492 scsi_cmd[8] = args[3]; 493 scsi_cmd[10] = args[4]; 494 scsi_cmd[12] = args[5]; 495 scsi_cmd[13] = args[6] & 0x4f; 496 scsi_cmd[14] = args[0]; 497 498 /* Good values for timeout and retries? Values below 499 from scsi_ioctl_send_command() for default case... */ 500 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 501 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 502 503 if (cmd_result < 0) { 504 rc = cmd_result; 505 goto error; 506 } 507 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 508 u8 *desc = sensebuf + 8; 509 510 /* If we set cc then ATA pass-through will cause a 511 * check condition even if no error. Filter that. */ 512 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 513 if (sshdr.sense_key == RECOVERED_ERROR && 514 sshdr.asc == 0 && sshdr.ascq == 0x1d) 515 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 516 } 517 518 /* Send userspace ATA registers */ 519 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 520 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 521 args[0] = desc[13]; /* status */ 522 args[1] = desc[3]; /* error */ 523 args[2] = desc[5]; /* sector count (0:7) */ 524 args[3] = desc[7]; /* lbal */ 525 args[4] = desc[9]; /* lbam */ 526 args[5] = desc[11]; /* lbah */ 527 args[6] = desc[12]; /* select */ 528 if (copy_to_user(arg, args, sizeof(args))) 529 rc = -EFAULT; 530 } 531 } 532 533 if (cmd_result) { 534 rc = -EIO; 535 goto error; 536 } 537 538 error: 539 return rc; 540 } 541 542 static int ata_ioc32(struct ata_port *ap) 543 { 544 if (ap->flags & ATA_FLAG_PIO_DMA) 545 return 1; 546 if (ap->pflags & ATA_PFLAG_PIO32) 547 return 1; 548 return 0; 549 } 550 551 /* 552 * This handles both native and compat commands, so anything added 553 * here must have a compatible argument, or check in_compat_syscall() 554 */ 555 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 556 unsigned int cmd, void __user *arg) 557 { 558 unsigned long val; 559 int rc = -EINVAL; 560 unsigned long flags; 561 562 switch (cmd) { 563 case HDIO_GET_32BIT: 564 spin_lock_irqsave(ap->lock, flags); 565 val = ata_ioc32(ap); 566 spin_unlock_irqrestore(ap->lock, flags); 567 #ifdef CONFIG_COMPAT 568 if (in_compat_syscall()) 569 return put_user(val, (compat_ulong_t __user *)arg); 570 #endif 571 return put_user(val, (unsigned long __user *)arg); 572 573 case HDIO_SET_32BIT: 574 val = (unsigned long) arg; 575 rc = 0; 576 spin_lock_irqsave(ap->lock, flags); 577 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 578 if (val) 579 ap->pflags |= ATA_PFLAG_PIO32; 580 else 581 ap->pflags &= ~ATA_PFLAG_PIO32; 582 } else { 583 if (val != ata_ioc32(ap)) 584 rc = -EINVAL; 585 } 586 spin_unlock_irqrestore(ap->lock, flags); 587 return rc; 588 589 case HDIO_GET_IDENTITY: 590 return ata_get_identity(ap, scsidev, arg); 591 592 case HDIO_DRIVE_CMD: 593 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 594 return -EACCES; 595 return ata_cmd_ioctl(scsidev, arg); 596 597 case HDIO_DRIVE_TASK: 598 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 599 return -EACCES; 600 return ata_task_ioctl(scsidev, arg); 601 602 default: 603 rc = -ENOTTY; 604 break; 605 } 606 607 return rc; 608 } 609 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 610 611 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 612 void __user *arg) 613 { 614 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 615 scsidev, cmd, arg); 616 } 617 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 618 619 /** 620 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 621 * @dev: ATA device to which the new command is attached 622 * @cmd: SCSI command that originated this ATA command 623 * 624 * Obtain a reference to an unused ata_queued_cmd structure, 625 * which is the basic libata structure representing a single 626 * ATA command sent to the hardware. 627 * 628 * If a command was available, fill in the SCSI-specific 629 * portions of the structure with information on the 630 * current command. 631 * 632 * LOCKING: 633 * spin_lock_irqsave(host lock) 634 * 635 * RETURNS: 636 * Command allocated, or %NULL if none available. 637 */ 638 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 639 struct scsi_cmnd *cmd) 640 { 641 struct ata_queued_cmd *qc; 642 643 qc = ata_qc_new_init(dev, scsi_cmd_to_rq(cmd)->tag); 644 if (qc) { 645 qc->scsicmd = cmd; 646 qc->scsidone = scsi_done; 647 648 qc->sg = scsi_sglist(cmd); 649 qc->n_elem = scsi_sg_count(cmd); 650 651 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 652 qc->flags |= ATA_QCFLAG_QUIET; 653 } else { 654 cmd->result = (DID_OK << 16) | SAM_STAT_TASK_SET_FULL; 655 scsi_done(cmd); 656 } 657 658 return qc; 659 } 660 661 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 662 { 663 struct scsi_cmnd *scmd = qc->scsicmd; 664 665 qc->extrabytes = scmd->extra_len; 666 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 667 } 668 669 /** 670 * ata_dump_status - user friendly display of error info 671 * @id: id of the port in question 672 * @tf: ptr to filled out taskfile 673 * 674 * Decode and dump the ATA error/status registers for the user so 675 * that they have some idea what really happened at the non 676 * make-believe layer. 677 * 678 * LOCKING: 679 * inherited from caller 680 */ 681 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 682 { 683 u8 stat = tf->command, err = tf->feature; 684 685 pr_warn("ata%u: status=0x%02x { ", id, stat); 686 if (stat & ATA_BUSY) { 687 pr_cont("Busy }\n"); /* Data is not valid in this case */ 688 } else { 689 if (stat & ATA_DRDY) pr_cont("DriveReady "); 690 if (stat & ATA_DF) pr_cont("DeviceFault "); 691 if (stat & ATA_DSC) pr_cont("SeekComplete "); 692 if (stat & ATA_DRQ) pr_cont("DataRequest "); 693 if (stat & ATA_CORR) pr_cont("CorrectedError "); 694 if (stat & ATA_SENSE) pr_cont("Sense "); 695 if (stat & ATA_ERR) pr_cont("Error "); 696 pr_cont("}\n"); 697 698 if (err) { 699 pr_warn("ata%u: error=0x%02x { ", id, err); 700 if (err & ATA_ABORTED) pr_cont("DriveStatusError "); 701 if (err & ATA_ICRC) { 702 if (err & ATA_ABORTED) 703 pr_cont("BadCRC "); 704 else pr_cont("Sector "); 705 } 706 if (err & ATA_UNC) pr_cont("UncorrectableError "); 707 if (err & ATA_IDNF) pr_cont("SectorIdNotFound "); 708 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound "); 709 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound "); 710 pr_cont("}\n"); 711 } 712 } 713 } 714 715 /** 716 * ata_to_sense_error - convert ATA error to SCSI error 717 * @id: ATA device number 718 * @drv_stat: value contained in ATA status register 719 * @drv_err: value contained in ATA error register 720 * @sk: the sense key we'll fill out 721 * @asc: the additional sense code we'll fill out 722 * @ascq: the additional sense code qualifier we'll fill out 723 * @verbose: be verbose 724 * 725 * Converts an ATA error into a SCSI error. Fill out pointers to 726 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 727 * format sense blocks. 728 * 729 * LOCKING: 730 * spin_lock_irqsave(host lock) 731 */ 732 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 733 u8 *asc, u8 *ascq, int verbose) 734 { 735 int i; 736 737 /* Based on the 3ware driver translation table */ 738 static const unsigned char sense_table[][4] = { 739 /* BBD|ECC|ID|MAR */ 740 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 741 // Device busy Aborted command 742 /* BBD|ECC|ID */ 743 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 744 // Device busy Aborted command 745 /* ECC|MC|MARK */ 746 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 747 // Device fault Hardware error 748 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 749 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 750 // Data CRC error SCSI parity error 751 /* MC|ID|ABRT|TRK0|MARK */ 752 {0x37, NOT_READY, 0x04, 0x00}, 753 // Unit offline Not ready 754 /* MCR|MARK */ 755 {0x09, NOT_READY, 0x04, 0x00}, 756 // Unrecovered disk error Not ready 757 /* Bad address mark */ 758 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 759 // Address mark not found for data field 760 /* TRK0 - Track 0 not found */ 761 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 762 // Hardware error 763 /* Abort: 0x04 is not translated here, see below */ 764 /* Media change request */ 765 {0x08, NOT_READY, 0x04, 0x00}, 766 // FIXME: faking offline 767 /* SRV/IDNF - ID not found */ 768 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 769 // Logical address out of range 770 /* MC - Media Changed */ 771 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 772 // Not ready to ready change, medium may have changed 773 /* ECC - Uncorrectable ECC error */ 774 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 775 // Unrecovered read error 776 /* BBD - block marked bad */ 777 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 778 // Block marked bad Medium error, unrecovered read error 779 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 780 }; 781 static const unsigned char stat_table[][4] = { 782 /* Must be first because BUSY means no other bits valid */ 783 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 784 // Busy, fake parity for now 785 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 786 // Device ready, unaligned write command 787 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 788 // Device fault, internal target failure 789 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 790 // Timed out in xfer, fake parity for now 791 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 792 // Recovered ECC error Medium error, recovered 793 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 794 }; 795 796 /* 797 * Is this an error we can process/parse 798 */ 799 if (drv_stat & ATA_BUSY) { 800 drv_err = 0; /* Ignore the err bits, they're invalid */ 801 } 802 803 if (drv_err) { 804 /* Look for drv_err */ 805 for (i = 0; sense_table[i][0] != 0xFF; i++) { 806 /* Look for best matches first */ 807 if ((sense_table[i][0] & drv_err) == 808 sense_table[i][0]) { 809 *sk = sense_table[i][1]; 810 *asc = sense_table[i][2]; 811 *ascq = sense_table[i][3]; 812 goto translate_done; 813 } 814 } 815 } 816 817 /* 818 * Fall back to interpreting status bits. Note that if the drv_err 819 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 820 * is not descriptive enough. 821 */ 822 for (i = 0; stat_table[i][0] != 0xFF; i++) { 823 if (stat_table[i][0] & drv_stat) { 824 *sk = stat_table[i][1]; 825 *asc = stat_table[i][2]; 826 *ascq = stat_table[i][3]; 827 goto translate_done; 828 } 829 } 830 831 /* 832 * We need a sensible error return here, which is tricky, and one 833 * that won't cause people to do things like return a disk wrongly. 834 */ 835 *sk = ABORTED_COMMAND; 836 *asc = 0x00; 837 *ascq = 0x00; 838 839 translate_done: 840 if (verbose) 841 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 842 id, drv_stat, drv_err, *sk, *asc, *ascq); 843 return; 844 } 845 846 /* 847 * ata_gen_passthru_sense - Generate check condition sense block. 848 * @qc: Command that completed. 849 * 850 * This function is specific to the ATA descriptor format sense 851 * block specified for the ATA pass through commands. Regardless 852 * of whether the command errored or not, return a sense 853 * block. Copy all controller registers into the sense 854 * block. If there was no error, we get the request from an ATA 855 * passthrough command, so we use the following sense data: 856 * sk = RECOVERED ERROR 857 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 858 * 859 * 860 * LOCKING: 861 * None. 862 */ 863 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 864 { 865 struct scsi_cmnd *cmd = qc->scsicmd; 866 struct ata_taskfile *tf = &qc->result_tf; 867 unsigned char *sb = cmd->sense_buffer; 868 unsigned char *desc = sb + 8; 869 int verbose = qc->ap->ops->error_handler == NULL; 870 u8 sense_key, asc, ascq; 871 872 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 873 874 /* 875 * Use ata_to_sense_error() to map status register bits 876 * onto sense key, asc & ascq. 877 */ 878 if (qc->err_mask || 879 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 880 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 881 &sense_key, &asc, &ascq, verbose); 882 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 883 } else { 884 /* 885 * ATA PASS-THROUGH INFORMATION AVAILABLE 886 * Always in descriptor format sense. 887 */ 888 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 889 } 890 891 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 892 u8 len; 893 894 /* descriptor format */ 895 len = sb[7]; 896 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 897 if (!desc) { 898 if (SCSI_SENSE_BUFFERSIZE < len + 14) 899 return; 900 sb[7] = len + 14; 901 desc = sb + 8 + len; 902 } 903 desc[0] = 9; 904 desc[1] = 12; 905 /* 906 * Copy registers into sense buffer. 907 */ 908 desc[2] = 0x00; 909 desc[3] = tf->feature; /* == error reg */ 910 desc[5] = tf->nsect; 911 desc[7] = tf->lbal; 912 desc[9] = tf->lbam; 913 desc[11] = tf->lbah; 914 desc[12] = tf->device; 915 desc[13] = tf->command; /* == status reg */ 916 917 /* 918 * Fill in Extend bit, and the high order bytes 919 * if applicable. 920 */ 921 if (tf->flags & ATA_TFLAG_LBA48) { 922 desc[2] |= 0x01; 923 desc[4] = tf->hob_nsect; 924 desc[6] = tf->hob_lbal; 925 desc[8] = tf->hob_lbam; 926 desc[10] = tf->hob_lbah; 927 } 928 } else { 929 /* Fixed sense format */ 930 desc[0] = tf->feature; 931 desc[1] = tf->command; /* status */ 932 desc[2] = tf->device; 933 desc[3] = tf->nsect; 934 desc[7] = 0; 935 if (tf->flags & ATA_TFLAG_LBA48) { 936 desc[8] |= 0x80; 937 if (tf->hob_nsect) 938 desc[8] |= 0x40; 939 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 940 desc[8] |= 0x20; 941 } 942 desc[9] = tf->lbal; 943 desc[10] = tf->lbam; 944 desc[11] = tf->lbah; 945 } 946 } 947 948 /** 949 * ata_gen_ata_sense - generate a SCSI fixed sense block 950 * @qc: Command that we are erroring out 951 * 952 * Generate sense block for a failed ATA command @qc. Descriptor 953 * format is used to accommodate LBA48 block address. 954 * 955 * LOCKING: 956 * None. 957 */ 958 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 959 { 960 struct ata_device *dev = qc->dev; 961 struct scsi_cmnd *cmd = qc->scsicmd; 962 struct ata_taskfile *tf = &qc->result_tf; 963 unsigned char *sb = cmd->sense_buffer; 964 int verbose = qc->ap->ops->error_handler == NULL; 965 u64 block; 966 u8 sense_key, asc, ascq; 967 968 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 969 970 if (ata_dev_disabled(dev)) { 971 /* Device disabled after error recovery */ 972 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 973 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 974 return; 975 } 976 /* Use ata_to_sense_error() to map status register bits 977 * onto sense key, asc & ascq. 978 */ 979 if (qc->err_mask || 980 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 981 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 982 &sense_key, &asc, &ascq, verbose); 983 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 984 } else { 985 /* Could not decode error */ 986 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 987 tf->command, qc->err_mask); 988 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 989 return; 990 } 991 992 block = ata_tf_read_block(&qc->result_tf, dev); 993 if (block == U64_MAX) 994 return; 995 996 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 997 } 998 999 void ata_scsi_sdev_config(struct scsi_device *sdev) 1000 { 1001 sdev->use_10_for_rw = 1; 1002 sdev->use_10_for_ms = 1; 1003 sdev->no_write_same = 1; 1004 1005 /* Schedule policy is determined by ->qc_defer() callback and 1006 * it needs to see every deferred qc. Set dev_blocked to 1 to 1007 * prevent SCSI midlayer from automatically deferring 1008 * requests. 1009 */ 1010 sdev->max_device_blocked = 1; 1011 } 1012 1013 /** 1014 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1015 * @rq: request to be checked 1016 * 1017 * ATAPI commands which transfer variable length data to host 1018 * might overflow due to application error or hardware bug. This 1019 * function checks whether overflow should be drained and ignored 1020 * for @request. 1021 * 1022 * LOCKING: 1023 * None. 1024 * 1025 * RETURNS: 1026 * 1 if ; otherwise, 0. 1027 */ 1028 bool ata_scsi_dma_need_drain(struct request *rq) 1029 { 1030 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; 1031 } 1032 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1033 1034 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1035 { 1036 struct request_queue *q = sdev->request_queue; 1037 1038 if (!ata_id_has_unload(dev->id)) 1039 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1040 1041 /* configure max sectors */ 1042 blk_queue_max_hw_sectors(q, dev->max_sectors); 1043 1044 if (dev->class == ATA_DEV_ATAPI) { 1045 sdev->sector_size = ATA_SECT_SIZE; 1046 1047 /* set DMA padding */ 1048 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1049 1050 /* make room for appending the drain */ 1051 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1052 1053 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1054 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1055 if (!sdev->dma_drain_buf) { 1056 ata_dev_err(dev, "drain buffer allocation failed\n"); 1057 return -ENOMEM; 1058 } 1059 } else { 1060 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1061 sdev->manage_start_stop = 1; 1062 } 1063 1064 /* 1065 * ata_pio_sectors() expects buffer for each sector to not cross 1066 * page boundary. Enforce it by requiring buffers to be sector 1067 * aligned, which works iff sector_size is not larger than 1068 * PAGE_SIZE. ATAPI devices also need the alignment as 1069 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1070 */ 1071 if (sdev->sector_size > PAGE_SIZE) 1072 ata_dev_warn(dev, 1073 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1074 sdev->sector_size); 1075 1076 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1077 1078 if (dev->flags & ATA_DFLAG_AN) 1079 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1080 1081 if (dev->flags & ATA_DFLAG_NCQ) { 1082 int depth; 1083 1084 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1085 depth = min(ATA_MAX_QUEUE, depth); 1086 scsi_change_queue_depth(sdev, depth); 1087 } 1088 1089 if (dev->flags & ATA_DFLAG_TRUSTED) 1090 sdev->security_supported = 1; 1091 1092 dev->sdev = sdev; 1093 return 0; 1094 } 1095 1096 /** 1097 * ata_scsi_slave_config - Set SCSI device attributes 1098 * @sdev: SCSI device to examine 1099 * 1100 * This is called before we actually start reading 1101 * and writing to the device, to configure certain 1102 * SCSI mid-layer behaviors. 1103 * 1104 * LOCKING: 1105 * Defined by SCSI layer. We don't really care. 1106 */ 1107 1108 int ata_scsi_slave_config(struct scsi_device *sdev) 1109 { 1110 struct ata_port *ap = ata_shost_to_port(sdev->host); 1111 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1112 int rc = 0; 1113 1114 ata_scsi_sdev_config(sdev); 1115 1116 if (dev) 1117 rc = ata_scsi_dev_config(sdev, dev); 1118 1119 return rc; 1120 } 1121 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1122 1123 /** 1124 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1125 * @sdev: SCSI device to be destroyed 1126 * 1127 * @sdev is about to be destroyed for hot/warm unplugging. If 1128 * this unplugging was initiated by libata as indicated by NULL 1129 * dev->sdev, this function doesn't have to do anything. 1130 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1131 * Clear dev->sdev, schedule the device for ATA detach and invoke 1132 * EH. 1133 * 1134 * LOCKING: 1135 * Defined by SCSI layer. We don't really care. 1136 */ 1137 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1138 { 1139 struct ata_port *ap = ata_shost_to_port(sdev->host); 1140 unsigned long flags; 1141 struct ata_device *dev; 1142 1143 if (!ap->ops->error_handler) 1144 return; 1145 1146 spin_lock_irqsave(ap->lock, flags); 1147 dev = __ata_scsi_find_dev(ap, sdev); 1148 if (dev && dev->sdev) { 1149 /* SCSI device already in CANCEL state, no need to offline it */ 1150 dev->sdev = NULL; 1151 dev->flags |= ATA_DFLAG_DETACH; 1152 ata_port_schedule_eh(ap); 1153 } 1154 spin_unlock_irqrestore(ap->lock, flags); 1155 1156 kfree(sdev->dma_drain_buf); 1157 } 1158 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1159 1160 /** 1161 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1162 * @qc: Storage for translated ATA taskfile 1163 * 1164 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1165 * (to start). Perhaps these commands should be preceded by 1166 * CHECK POWER MODE to see what power mode the device is already in. 1167 * [See SAT revision 5 at www.t10.org] 1168 * 1169 * LOCKING: 1170 * spin_lock_irqsave(host lock) 1171 * 1172 * RETURNS: 1173 * Zero on success, non-zero on error. 1174 */ 1175 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1176 { 1177 struct scsi_cmnd *scmd = qc->scsicmd; 1178 struct ata_taskfile *tf = &qc->tf; 1179 const u8 *cdb = scmd->cmnd; 1180 u16 fp; 1181 u8 bp = 0xff; 1182 1183 if (scmd->cmd_len < 5) { 1184 fp = 4; 1185 goto invalid_fld; 1186 } 1187 1188 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1189 tf->protocol = ATA_PROT_NODATA; 1190 if (cdb[1] & 0x1) { 1191 ; /* ignore IMMED bit, violates sat-r05 */ 1192 } 1193 if (cdb[4] & 0x2) { 1194 fp = 4; 1195 bp = 1; 1196 goto invalid_fld; /* LOEJ bit set not supported */ 1197 } 1198 if (((cdb[4] >> 4) & 0xf) != 0) { 1199 fp = 4; 1200 bp = 3; 1201 goto invalid_fld; /* power conditions not supported */ 1202 } 1203 1204 if (cdb[4] & 0x1) { 1205 tf->nsect = 1; /* 1 sector, lba=0 */ 1206 1207 if (qc->dev->flags & ATA_DFLAG_LBA) { 1208 tf->flags |= ATA_TFLAG_LBA; 1209 1210 tf->lbah = 0x0; 1211 tf->lbam = 0x0; 1212 tf->lbal = 0x0; 1213 tf->device |= ATA_LBA; 1214 } else { 1215 /* CHS */ 1216 tf->lbal = 0x1; /* sect */ 1217 tf->lbam = 0x0; /* cyl low */ 1218 tf->lbah = 0x0; /* cyl high */ 1219 } 1220 1221 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1222 } else { 1223 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1224 * or S5) causing some drives to spin up and down again. 1225 */ 1226 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1227 system_state == SYSTEM_POWER_OFF) 1228 goto skip; 1229 1230 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1231 system_entering_hibernation()) 1232 goto skip; 1233 1234 /* Issue ATA STANDBY IMMEDIATE command */ 1235 tf->command = ATA_CMD_STANDBYNOW1; 1236 } 1237 1238 /* 1239 * Standby and Idle condition timers could be implemented but that 1240 * would require libata to implement the Power condition mode page 1241 * and allow the user to change it. Changing mode pages requires 1242 * MODE SELECT to be implemented. 1243 */ 1244 1245 return 0; 1246 1247 invalid_fld: 1248 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1249 return 1; 1250 skip: 1251 scmd->result = SAM_STAT_GOOD; 1252 return 1; 1253 } 1254 1255 1256 /** 1257 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1258 * @qc: Storage for translated ATA taskfile 1259 * 1260 * Sets up an ATA taskfile to issue FLUSH CACHE or 1261 * FLUSH CACHE EXT. 1262 * 1263 * LOCKING: 1264 * spin_lock_irqsave(host lock) 1265 * 1266 * RETURNS: 1267 * Zero on success, non-zero on error. 1268 */ 1269 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1270 { 1271 struct ata_taskfile *tf = &qc->tf; 1272 1273 tf->flags |= ATA_TFLAG_DEVICE; 1274 tf->protocol = ATA_PROT_NODATA; 1275 1276 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1277 tf->command = ATA_CMD_FLUSH_EXT; 1278 else 1279 tf->command = ATA_CMD_FLUSH; 1280 1281 /* flush is critical for IO integrity, consider it an IO command */ 1282 qc->flags |= ATA_QCFLAG_IO; 1283 1284 return 0; 1285 } 1286 1287 /** 1288 * scsi_6_lba_len - Get LBA and transfer length 1289 * @cdb: SCSI command to translate 1290 * 1291 * Calculate LBA and transfer length for 6-byte commands. 1292 * 1293 * RETURNS: 1294 * @plba: the LBA 1295 * @plen: the transfer length 1296 */ 1297 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1298 { 1299 u64 lba = 0; 1300 u32 len; 1301 1302 VPRINTK("six-byte command\n"); 1303 1304 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1305 lba |= ((u64)cdb[2]) << 8; 1306 lba |= ((u64)cdb[3]); 1307 1308 len = cdb[4]; 1309 1310 *plba = lba; 1311 *plen = len; 1312 } 1313 1314 /** 1315 * scsi_10_lba_len - Get LBA and transfer length 1316 * @cdb: SCSI command to translate 1317 * 1318 * Calculate LBA and transfer length for 10-byte commands. 1319 * 1320 * RETURNS: 1321 * @plba: the LBA 1322 * @plen: the transfer length 1323 */ 1324 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1325 { 1326 u64 lba = 0; 1327 u32 len = 0; 1328 1329 VPRINTK("ten-byte command\n"); 1330 1331 lba |= ((u64)cdb[2]) << 24; 1332 lba |= ((u64)cdb[3]) << 16; 1333 lba |= ((u64)cdb[4]) << 8; 1334 lba |= ((u64)cdb[5]); 1335 1336 len |= ((u32)cdb[7]) << 8; 1337 len |= ((u32)cdb[8]); 1338 1339 *plba = lba; 1340 *plen = len; 1341 } 1342 1343 /** 1344 * scsi_16_lba_len - Get LBA and transfer length 1345 * @cdb: SCSI command to translate 1346 * 1347 * Calculate LBA and transfer length for 16-byte commands. 1348 * 1349 * RETURNS: 1350 * @plba: the LBA 1351 * @plen: the transfer length 1352 */ 1353 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1354 { 1355 u64 lba = 0; 1356 u32 len = 0; 1357 1358 VPRINTK("sixteen-byte command\n"); 1359 1360 lba |= ((u64)cdb[2]) << 56; 1361 lba |= ((u64)cdb[3]) << 48; 1362 lba |= ((u64)cdb[4]) << 40; 1363 lba |= ((u64)cdb[5]) << 32; 1364 lba |= ((u64)cdb[6]) << 24; 1365 lba |= ((u64)cdb[7]) << 16; 1366 lba |= ((u64)cdb[8]) << 8; 1367 lba |= ((u64)cdb[9]); 1368 1369 len |= ((u32)cdb[10]) << 24; 1370 len |= ((u32)cdb[11]) << 16; 1371 len |= ((u32)cdb[12]) << 8; 1372 len |= ((u32)cdb[13]); 1373 1374 *plba = lba; 1375 *plen = len; 1376 } 1377 1378 /** 1379 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1380 * @qc: Storage for translated ATA taskfile 1381 * 1382 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1383 * 1384 * LOCKING: 1385 * spin_lock_irqsave(host lock) 1386 * 1387 * RETURNS: 1388 * Zero on success, non-zero on error. 1389 */ 1390 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1391 { 1392 struct scsi_cmnd *scmd = qc->scsicmd; 1393 struct ata_taskfile *tf = &qc->tf; 1394 struct ata_device *dev = qc->dev; 1395 u64 dev_sectors = qc->dev->n_sectors; 1396 const u8 *cdb = scmd->cmnd; 1397 u64 block; 1398 u32 n_block; 1399 u16 fp; 1400 1401 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1402 tf->protocol = ATA_PROT_NODATA; 1403 1404 if (cdb[0] == VERIFY) { 1405 if (scmd->cmd_len < 10) { 1406 fp = 9; 1407 goto invalid_fld; 1408 } 1409 scsi_10_lba_len(cdb, &block, &n_block); 1410 } else if (cdb[0] == VERIFY_16) { 1411 if (scmd->cmd_len < 16) { 1412 fp = 15; 1413 goto invalid_fld; 1414 } 1415 scsi_16_lba_len(cdb, &block, &n_block); 1416 } else { 1417 fp = 0; 1418 goto invalid_fld; 1419 } 1420 1421 if (!n_block) 1422 goto nothing_to_do; 1423 if (block >= dev_sectors) 1424 goto out_of_range; 1425 if ((block + n_block) > dev_sectors) 1426 goto out_of_range; 1427 1428 if (dev->flags & ATA_DFLAG_LBA) { 1429 tf->flags |= ATA_TFLAG_LBA; 1430 1431 if (lba_28_ok(block, n_block)) { 1432 /* use LBA28 */ 1433 tf->command = ATA_CMD_VERIFY; 1434 tf->device |= (block >> 24) & 0xf; 1435 } else if (lba_48_ok(block, n_block)) { 1436 if (!(dev->flags & ATA_DFLAG_LBA48)) 1437 goto out_of_range; 1438 1439 /* use LBA48 */ 1440 tf->flags |= ATA_TFLAG_LBA48; 1441 tf->command = ATA_CMD_VERIFY_EXT; 1442 1443 tf->hob_nsect = (n_block >> 8) & 0xff; 1444 1445 tf->hob_lbah = (block >> 40) & 0xff; 1446 tf->hob_lbam = (block >> 32) & 0xff; 1447 tf->hob_lbal = (block >> 24) & 0xff; 1448 } else 1449 /* request too large even for LBA48 */ 1450 goto out_of_range; 1451 1452 tf->nsect = n_block & 0xff; 1453 1454 tf->lbah = (block >> 16) & 0xff; 1455 tf->lbam = (block >> 8) & 0xff; 1456 tf->lbal = block & 0xff; 1457 1458 tf->device |= ATA_LBA; 1459 } else { 1460 /* CHS */ 1461 u32 sect, head, cyl, track; 1462 1463 if (!lba_28_ok(block, n_block)) 1464 goto out_of_range; 1465 1466 /* Convert LBA to CHS */ 1467 track = (u32)block / dev->sectors; 1468 cyl = track / dev->heads; 1469 head = track % dev->heads; 1470 sect = (u32)block % dev->sectors + 1; 1471 1472 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1473 (u32)block, track, cyl, head, sect); 1474 1475 /* Check whether the converted CHS can fit. 1476 Cylinder: 0-65535 1477 Head: 0-15 1478 Sector: 1-255*/ 1479 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1480 goto out_of_range; 1481 1482 tf->command = ATA_CMD_VERIFY; 1483 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1484 tf->lbal = sect; 1485 tf->lbam = cyl; 1486 tf->lbah = cyl >> 8; 1487 tf->device |= head; 1488 } 1489 1490 return 0; 1491 1492 invalid_fld: 1493 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1494 return 1; 1495 1496 out_of_range: 1497 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1498 /* "Logical Block Address out of range" */ 1499 return 1; 1500 1501 nothing_to_do: 1502 scmd->result = SAM_STAT_GOOD; 1503 return 1; 1504 } 1505 1506 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1507 { 1508 struct request *rq = scsi_cmd_to_rq(scmd); 1509 u32 req_blocks; 1510 1511 if (!blk_rq_is_passthrough(rq)) 1512 return true; 1513 1514 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1515 if (n_blocks > req_blocks) 1516 return false; 1517 1518 return true; 1519 } 1520 1521 /** 1522 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1523 * @qc: Storage for translated ATA taskfile 1524 * 1525 * Converts any of six SCSI read/write commands into the 1526 * ATA counterpart, including starting sector (LBA), 1527 * sector count, and taking into account the device's LBA48 1528 * support. 1529 * 1530 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1531 * %WRITE_16 are currently supported. 1532 * 1533 * LOCKING: 1534 * spin_lock_irqsave(host lock) 1535 * 1536 * RETURNS: 1537 * Zero on success, non-zero on error. 1538 */ 1539 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1540 { 1541 struct scsi_cmnd *scmd = qc->scsicmd; 1542 const u8 *cdb = scmd->cmnd; 1543 struct request *rq = scsi_cmd_to_rq(scmd); 1544 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1545 unsigned int tf_flags = 0; 1546 u64 block; 1547 u32 n_block; 1548 int rc; 1549 u16 fp = 0; 1550 1551 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1552 tf_flags |= ATA_TFLAG_WRITE; 1553 1554 /* Calculate the SCSI LBA, transfer length and FUA. */ 1555 switch (cdb[0]) { 1556 case READ_10: 1557 case WRITE_10: 1558 if (unlikely(scmd->cmd_len < 10)) { 1559 fp = 9; 1560 goto invalid_fld; 1561 } 1562 scsi_10_lba_len(cdb, &block, &n_block); 1563 if (cdb[1] & (1 << 3)) 1564 tf_flags |= ATA_TFLAG_FUA; 1565 if (!ata_check_nblocks(scmd, n_block)) 1566 goto invalid_fld; 1567 break; 1568 case READ_6: 1569 case WRITE_6: 1570 if (unlikely(scmd->cmd_len < 6)) { 1571 fp = 5; 1572 goto invalid_fld; 1573 } 1574 scsi_6_lba_len(cdb, &block, &n_block); 1575 1576 /* for 6-byte r/w commands, transfer length 0 1577 * means 256 blocks of data, not 0 block. 1578 */ 1579 if (!n_block) 1580 n_block = 256; 1581 if (!ata_check_nblocks(scmd, n_block)) 1582 goto invalid_fld; 1583 break; 1584 case READ_16: 1585 case WRITE_16: 1586 if (unlikely(scmd->cmd_len < 16)) { 1587 fp = 15; 1588 goto invalid_fld; 1589 } 1590 scsi_16_lba_len(cdb, &block, &n_block); 1591 if (cdb[1] & (1 << 3)) 1592 tf_flags |= ATA_TFLAG_FUA; 1593 if (!ata_check_nblocks(scmd, n_block)) 1594 goto invalid_fld; 1595 break; 1596 default: 1597 DPRINTK("no-byte command\n"); 1598 fp = 0; 1599 goto invalid_fld; 1600 } 1601 1602 /* Check and compose ATA command */ 1603 if (!n_block) 1604 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1605 * length 0 means transfer 0 block of data. 1606 * However, for ATA R/W commands, sector count 0 means 1607 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1608 * 1609 * WARNING: one or two older ATA drives treat 0 as 0... 1610 */ 1611 goto nothing_to_do; 1612 1613 qc->flags |= ATA_QCFLAG_IO; 1614 qc->nbytes = n_block * scmd->device->sector_size; 1615 1616 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1617 qc->hw_tag, class); 1618 1619 if (likely(rc == 0)) 1620 return 0; 1621 1622 if (rc == -ERANGE) 1623 goto out_of_range; 1624 /* treat all other errors as -EINVAL, fall through */ 1625 invalid_fld: 1626 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1627 return 1; 1628 1629 out_of_range: 1630 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1631 /* "Logical Block Address out of range" */ 1632 return 1; 1633 1634 nothing_to_do: 1635 scmd->result = SAM_STAT_GOOD; 1636 return 1; 1637 } 1638 1639 static void ata_qc_done(struct ata_queued_cmd *qc) 1640 { 1641 struct scsi_cmnd *cmd = qc->scsicmd; 1642 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1643 1644 ata_qc_free(qc); 1645 done(cmd); 1646 } 1647 1648 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1649 { 1650 struct ata_port *ap = qc->ap; 1651 struct scsi_cmnd *cmd = qc->scsicmd; 1652 u8 *cdb = cmd->cmnd; 1653 int need_sense = (qc->err_mask != 0); 1654 1655 /* For ATA pass thru (SAT) commands, generate a sense block if 1656 * user mandated it or if there's an error. Note that if we 1657 * generate because the user forced us to [CK_COND =1], a check 1658 * condition is generated and the ATA register values are returned 1659 * whether the command completed successfully or not. If there 1660 * was no error, we use the following sense data: 1661 * sk = RECOVERED ERROR 1662 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1663 */ 1664 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1665 ((cdb[2] & 0x20) || need_sense)) 1666 ata_gen_passthru_sense(qc); 1667 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1668 cmd->result = SAM_STAT_CHECK_CONDITION; 1669 else if (need_sense) 1670 ata_gen_ata_sense(qc); 1671 else 1672 cmd->result = SAM_STAT_GOOD; 1673 1674 if (need_sense && !ap->ops->error_handler) 1675 ata_dump_status(ap->print_id, &qc->result_tf); 1676 1677 ata_qc_done(qc); 1678 } 1679 1680 /** 1681 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1682 * @dev: ATA device to which the command is addressed 1683 * @cmd: SCSI command to execute 1684 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1685 * 1686 * Our ->queuecommand() function has decided that the SCSI 1687 * command issued can be directly translated into an ATA 1688 * command, rather than handled internally. 1689 * 1690 * This function sets up an ata_queued_cmd structure for the 1691 * SCSI command, and sends that ata_queued_cmd to the hardware. 1692 * 1693 * The xlat_func argument (actor) returns 0 if ready to execute 1694 * ATA command, else 1 to finish translation. If 1 is returned 1695 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1696 * to be set reflecting an error condition or clean (early) 1697 * termination. 1698 * 1699 * LOCKING: 1700 * spin_lock_irqsave(host lock) 1701 * 1702 * RETURNS: 1703 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1704 * needs to be deferred. 1705 */ 1706 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1707 ata_xlat_func_t xlat_func) 1708 { 1709 struct ata_port *ap = dev->link->ap; 1710 struct ata_queued_cmd *qc; 1711 int rc; 1712 1713 VPRINTK("ENTER\n"); 1714 1715 qc = ata_scsi_qc_new(dev, cmd); 1716 if (!qc) 1717 goto err_mem; 1718 1719 /* data is present; dma-map it */ 1720 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1721 cmd->sc_data_direction == DMA_TO_DEVICE) { 1722 if (unlikely(scsi_bufflen(cmd) < 1)) { 1723 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1724 goto err_did; 1725 } 1726 1727 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1728 1729 qc->dma_dir = cmd->sc_data_direction; 1730 } 1731 1732 qc->complete_fn = ata_scsi_qc_complete; 1733 1734 if (xlat_func(qc)) 1735 goto early_finish; 1736 1737 if (ap->ops->qc_defer) { 1738 if ((rc = ap->ops->qc_defer(qc))) 1739 goto defer; 1740 } 1741 1742 /* select device, send command to hardware */ 1743 ata_qc_issue(qc); 1744 1745 VPRINTK("EXIT\n"); 1746 return 0; 1747 1748 early_finish: 1749 ata_qc_free(qc); 1750 scsi_done(cmd); 1751 DPRINTK("EXIT - early finish (good or error)\n"); 1752 return 0; 1753 1754 err_did: 1755 ata_qc_free(qc); 1756 cmd->result = (DID_ERROR << 16); 1757 scsi_done(cmd); 1758 err_mem: 1759 DPRINTK("EXIT - internal\n"); 1760 return 0; 1761 1762 defer: 1763 ata_qc_free(qc); 1764 DPRINTK("EXIT - defer\n"); 1765 if (rc == ATA_DEFER_LINK) 1766 return SCSI_MLQUEUE_DEVICE_BUSY; 1767 else 1768 return SCSI_MLQUEUE_HOST_BUSY; 1769 } 1770 1771 struct ata_scsi_args { 1772 struct ata_device *dev; 1773 u16 *id; 1774 struct scsi_cmnd *cmd; 1775 }; 1776 1777 /** 1778 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1779 * @args: device IDENTIFY data / SCSI command of interest. 1780 * @actor: Callback hook for desired SCSI command simulator 1781 * 1782 * Takes care of the hard work of simulating a SCSI command... 1783 * Mapping the response buffer, calling the command's handler, 1784 * and handling the handler's return value. This return value 1785 * indicates whether the handler wishes the SCSI command to be 1786 * completed successfully (0), or not (in which case cmd->result 1787 * and sense buffer are assumed to be set). 1788 * 1789 * LOCKING: 1790 * spin_lock_irqsave(host lock) 1791 */ 1792 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1793 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1794 { 1795 unsigned int rc; 1796 struct scsi_cmnd *cmd = args->cmd; 1797 unsigned long flags; 1798 1799 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1800 1801 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1802 rc = actor(args, ata_scsi_rbuf); 1803 if (rc == 0) 1804 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1805 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1806 1807 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1808 1809 if (rc == 0) 1810 cmd->result = SAM_STAT_GOOD; 1811 } 1812 1813 /** 1814 * ata_scsiop_inq_std - Simulate INQUIRY command 1815 * @args: device IDENTIFY data / SCSI command of interest. 1816 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1817 * 1818 * Returns standard device identification data associated 1819 * with non-VPD INQUIRY command output. 1820 * 1821 * LOCKING: 1822 * spin_lock_irqsave(host lock) 1823 */ 1824 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1825 { 1826 static const u8 versions[] = { 1827 0x00, 1828 0x60, /* SAM-3 (no version claimed) */ 1829 1830 0x03, 1831 0x20, /* SBC-2 (no version claimed) */ 1832 1833 0x03, 1834 0x00 /* SPC-3 (no version claimed) */ 1835 }; 1836 static const u8 versions_zbc[] = { 1837 0x00, 1838 0xA0, /* SAM-5 (no version claimed) */ 1839 1840 0x06, 1841 0x00, /* SBC-4 (no version claimed) */ 1842 1843 0x05, 1844 0xC0, /* SPC-5 (no version claimed) */ 1845 1846 0x60, 1847 0x24, /* ZBC r05 */ 1848 }; 1849 1850 u8 hdr[] = { 1851 TYPE_DISK, 1852 0, 1853 0x5, /* claim SPC-3 version compatibility */ 1854 2, 1855 95 - 4, 1856 0, 1857 0, 1858 2 1859 }; 1860 1861 VPRINTK("ENTER\n"); 1862 1863 /* set scsi removable (RMB) bit per ata bit, or if the 1864 * AHCI port says it's external (Hotplug-capable, eSATA). 1865 */ 1866 if (ata_id_removable(args->id) || 1867 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1868 hdr[1] |= (1 << 7); 1869 1870 if (args->dev->class == ATA_DEV_ZAC) { 1871 hdr[0] = TYPE_ZBC; 1872 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1873 } 1874 1875 memcpy(rbuf, hdr, sizeof(hdr)); 1876 memcpy(&rbuf[8], "ATA ", 8); 1877 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1878 1879 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1880 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1881 if (strncmp(&rbuf[32], " ", 4) == 0) 1882 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1883 1884 if (rbuf[32] == 0 || rbuf[32] == ' ') 1885 memcpy(&rbuf[32], "n/a ", 4); 1886 1887 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1888 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1889 else 1890 memcpy(rbuf + 58, versions, sizeof(versions)); 1891 1892 return 0; 1893 } 1894 1895 /** 1896 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1897 * @args: device IDENTIFY data / SCSI command of interest. 1898 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1899 * 1900 * Returns list of inquiry VPD pages available. 1901 * 1902 * LOCKING: 1903 * spin_lock_irqsave(host lock) 1904 */ 1905 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1906 { 1907 int i, num_pages = 0; 1908 static const u8 pages[] = { 1909 0x00, /* page 0x00, this page */ 1910 0x80, /* page 0x80, unit serial no page */ 1911 0x83, /* page 0x83, device ident page */ 1912 0x89, /* page 0x89, ata info page */ 1913 0xb0, /* page 0xb0, block limits page */ 1914 0xb1, /* page 0xb1, block device characteristics page */ 1915 0xb2, /* page 0xb2, thin provisioning page */ 1916 0xb6, /* page 0xb6, zoned block device characteristics */ 1917 0xb9, /* page 0xb9, concurrent positioning ranges */ 1918 }; 1919 1920 for (i = 0; i < sizeof(pages); i++) { 1921 if (pages[i] == 0xb6 && 1922 !(args->dev->flags & ATA_DFLAG_ZAC)) 1923 continue; 1924 rbuf[num_pages + 4] = pages[i]; 1925 num_pages++; 1926 } 1927 rbuf[3] = num_pages; /* number of supported VPD pages */ 1928 return 0; 1929 } 1930 1931 /** 1932 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1933 * @args: device IDENTIFY data / SCSI command of interest. 1934 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1935 * 1936 * Returns ATA device serial number. 1937 * 1938 * LOCKING: 1939 * spin_lock_irqsave(host lock) 1940 */ 1941 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1942 { 1943 static const u8 hdr[] = { 1944 0, 1945 0x80, /* this page code */ 1946 0, 1947 ATA_ID_SERNO_LEN, /* page len */ 1948 }; 1949 1950 memcpy(rbuf, hdr, sizeof(hdr)); 1951 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1952 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1953 return 0; 1954 } 1955 1956 /** 1957 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1958 * @args: device IDENTIFY data / SCSI command of interest. 1959 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1960 * 1961 * Yields two logical unit device identification designators: 1962 * - vendor specific ASCII containing the ATA serial number 1963 * - SAT defined "t10 vendor id based" containing ASCII vendor 1964 * name ("ATA "), model and serial numbers. 1965 * 1966 * LOCKING: 1967 * spin_lock_irqsave(host lock) 1968 */ 1969 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 1970 { 1971 const int sat_model_serial_desc_len = 68; 1972 int num; 1973 1974 rbuf[1] = 0x83; /* this page code */ 1975 num = 4; 1976 1977 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1978 rbuf[num + 0] = 2; 1979 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1980 num += 4; 1981 ata_id_string(args->id, (unsigned char *) rbuf + num, 1982 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1983 num += ATA_ID_SERNO_LEN; 1984 1985 /* SAT defined lu model and serial numbers descriptor */ 1986 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 1987 rbuf[num + 0] = 2; 1988 rbuf[num + 1] = 1; 1989 rbuf[num + 3] = sat_model_serial_desc_len; 1990 num += 4; 1991 memcpy(rbuf + num, "ATA ", 8); 1992 num += 8; 1993 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 1994 ATA_ID_PROD_LEN); 1995 num += ATA_ID_PROD_LEN; 1996 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 1997 ATA_ID_SERNO_LEN); 1998 num += ATA_ID_SERNO_LEN; 1999 2000 if (ata_id_has_wwn(args->id)) { 2001 /* SAT defined lu world wide name */ 2002 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2003 rbuf[num + 0] = 1; 2004 rbuf[num + 1] = 3; 2005 rbuf[num + 3] = ATA_ID_WWN_LEN; 2006 num += 4; 2007 ata_id_string(args->id, (unsigned char *) rbuf + num, 2008 ATA_ID_WWN, ATA_ID_WWN_LEN); 2009 num += ATA_ID_WWN_LEN; 2010 } 2011 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2012 return 0; 2013 } 2014 2015 /** 2016 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2017 * @args: device IDENTIFY data / SCSI command of interest. 2018 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2019 * 2020 * Yields SAT-specified ATA VPD page. 2021 * 2022 * LOCKING: 2023 * spin_lock_irqsave(host lock) 2024 */ 2025 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2026 { 2027 rbuf[1] = 0x89; /* our page code */ 2028 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2029 rbuf[3] = (0x238 & 0xff); 2030 2031 memcpy(&rbuf[8], "linux ", 8); 2032 memcpy(&rbuf[16], "libata ", 16); 2033 memcpy(&rbuf[32], DRV_VERSION, 4); 2034 2035 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2036 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2037 /* TODO: PMP? */ 2038 2039 /* we don't store the ATA device signature, so we fake it */ 2040 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2041 rbuf[40] = 0x1; 2042 rbuf[48] = 0x1; 2043 2044 rbuf[56] = ATA_CMD_ID_ATA; 2045 2046 memcpy(&rbuf[60], &args->id[0], 512); 2047 return 0; 2048 } 2049 2050 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2051 { 2052 struct ata_device *dev = args->dev; 2053 u16 min_io_sectors; 2054 2055 rbuf[1] = 0xb0; 2056 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2057 2058 /* 2059 * Optimal transfer length granularity. 2060 * 2061 * This is always one physical block, but for disks with a smaller 2062 * logical than physical sector size we need to figure out what the 2063 * latter is. 2064 */ 2065 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2066 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2067 2068 /* 2069 * Optimal unmap granularity. 2070 * 2071 * The ATA spec doesn't even know about a granularity or alignment 2072 * for the TRIM command. We can leave away most of the unmap related 2073 * VPD page entries, but we have specifify a granularity to signal 2074 * that we support some form of unmap - in thise case via WRITE SAME 2075 * with the unmap bit set. 2076 */ 2077 if (ata_id_has_trim(args->id)) { 2078 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2079 2080 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2081 max_blocks = 128 << (20 - SECTOR_SHIFT); 2082 2083 put_unaligned_be64(max_blocks, &rbuf[36]); 2084 put_unaligned_be32(1, &rbuf[28]); 2085 } 2086 2087 return 0; 2088 } 2089 2090 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2091 { 2092 int form_factor = ata_id_form_factor(args->id); 2093 int media_rotation_rate = ata_id_rotation_rate(args->id); 2094 u8 zoned = ata_id_zoned_cap(args->id); 2095 2096 rbuf[1] = 0xb1; 2097 rbuf[3] = 0x3c; 2098 rbuf[4] = media_rotation_rate >> 8; 2099 rbuf[5] = media_rotation_rate; 2100 rbuf[7] = form_factor; 2101 if (zoned) 2102 rbuf[8] = (zoned << 4); 2103 2104 return 0; 2105 } 2106 2107 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2108 { 2109 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2110 rbuf[1] = 0xb2; 2111 rbuf[3] = 0x4; 2112 rbuf[5] = 1 << 6; /* TPWS */ 2113 2114 return 0; 2115 } 2116 2117 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2118 { 2119 /* 2120 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2121 */ 2122 rbuf[1] = 0xb6; 2123 rbuf[3] = 0x3C; 2124 2125 /* 2126 * URSWRZ bit is only meaningful for host-managed ZAC drives 2127 */ 2128 if (args->dev->zac_zoned_cap & 1) 2129 rbuf[4] |= 1; 2130 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2131 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2132 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2133 2134 return 0; 2135 } 2136 2137 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2138 { 2139 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2140 u8 *desc = &rbuf[64]; 2141 int i; 2142 2143 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2144 rbuf[1] = 0xb9; 2145 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[3]); 2146 2147 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2148 desc[0] = cpr_log->cpr[i].num; 2149 desc[1] = cpr_log->cpr[i].num_storage_elements; 2150 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2151 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2152 } 2153 2154 return 0; 2155 } 2156 2157 /** 2158 * modecpy - Prepare response for MODE SENSE 2159 * @dest: output buffer 2160 * @src: data being copied 2161 * @n: length of mode page 2162 * @changeable: whether changeable parameters are requested 2163 * 2164 * Generate a generic MODE SENSE page for either current or changeable 2165 * parameters. 2166 * 2167 * LOCKING: 2168 * None. 2169 */ 2170 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2171 { 2172 if (changeable) { 2173 memcpy(dest, src, 2); 2174 memset(dest + 2, 0, n - 2); 2175 } else { 2176 memcpy(dest, src, n); 2177 } 2178 } 2179 2180 /** 2181 * ata_msense_caching - Simulate MODE SENSE caching info page 2182 * @id: device IDENTIFY data 2183 * @buf: output buffer 2184 * @changeable: whether changeable parameters are requested 2185 * 2186 * Generate a caching info page, which conditionally indicates 2187 * write caching to the SCSI layer, depending on device 2188 * capabilities. 2189 * 2190 * LOCKING: 2191 * None. 2192 */ 2193 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2194 { 2195 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2196 if (changeable) { 2197 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2198 } else { 2199 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2200 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2201 } 2202 return sizeof(def_cache_mpage); 2203 } 2204 2205 /** 2206 * ata_msense_control - Simulate MODE SENSE control mode page 2207 * @dev: ATA device of interest 2208 * @buf: output buffer 2209 * @changeable: whether changeable parameters are requested 2210 * 2211 * Generate a generic MODE SENSE control mode page. 2212 * 2213 * LOCKING: 2214 * None. 2215 */ 2216 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2217 bool changeable) 2218 { 2219 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2220 if (changeable) { 2221 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2222 } else { 2223 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2224 2225 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2226 } 2227 return sizeof(def_control_mpage); 2228 } 2229 2230 /** 2231 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2232 * @buf: output buffer 2233 * @changeable: whether changeable parameters are requested 2234 * 2235 * Generate a generic MODE SENSE r/w error recovery page. 2236 * 2237 * LOCKING: 2238 * None. 2239 */ 2240 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2241 { 2242 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2243 changeable); 2244 return sizeof(def_rw_recovery_mpage); 2245 } 2246 2247 /* 2248 * We can turn this into a real blacklist if it's needed, for now just 2249 * blacklist any Maxtor BANC1G10 revision firmware 2250 */ 2251 static int ata_dev_supports_fua(u16 *id) 2252 { 2253 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2254 2255 if (!libata_fua) 2256 return 0; 2257 if (!ata_id_has_fua(id)) 2258 return 0; 2259 2260 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2261 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2262 2263 if (strcmp(model, "Maxtor")) 2264 return 1; 2265 if (strcmp(fw, "BANC1G10")) 2266 return 1; 2267 2268 return 0; /* blacklisted */ 2269 } 2270 2271 /** 2272 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2273 * @args: device IDENTIFY data / SCSI command of interest. 2274 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2275 * 2276 * Simulate MODE SENSE commands. Assume this is invoked for direct 2277 * access devices (e.g. disks) only. There should be no block 2278 * descriptor for other device types. 2279 * 2280 * LOCKING: 2281 * spin_lock_irqsave(host lock) 2282 */ 2283 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2284 { 2285 struct ata_device *dev = args->dev; 2286 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2287 static const u8 sat_blk_desc[] = { 2288 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2289 0, 2290 0, 0x2, 0x0 /* block length: 512 bytes */ 2291 }; 2292 u8 pg, spg; 2293 unsigned int ebd, page_control, six_byte; 2294 u8 dpofua, bp = 0xff; 2295 u16 fp; 2296 2297 VPRINTK("ENTER\n"); 2298 2299 six_byte = (scsicmd[0] == MODE_SENSE); 2300 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2301 /* 2302 * LLBA bit in msense(10) ignored (compliant) 2303 */ 2304 2305 page_control = scsicmd[2] >> 6; 2306 switch (page_control) { 2307 case 0: /* current */ 2308 case 1: /* changeable */ 2309 case 2: /* defaults */ 2310 break; /* supported */ 2311 case 3: /* saved */ 2312 goto saving_not_supp; 2313 default: 2314 fp = 2; 2315 bp = 6; 2316 goto invalid_fld; 2317 } 2318 2319 if (six_byte) 2320 p += 4 + (ebd ? 8 : 0); 2321 else 2322 p += 8 + (ebd ? 8 : 0); 2323 2324 pg = scsicmd[2] & 0x3f; 2325 spg = scsicmd[3]; 2326 /* 2327 * No mode subpages supported (yet) but asking for _all_ 2328 * subpages may be valid 2329 */ 2330 if (spg && (spg != ALL_SUB_MPAGES)) { 2331 fp = 3; 2332 goto invalid_fld; 2333 } 2334 2335 switch(pg) { 2336 case RW_RECOVERY_MPAGE: 2337 p += ata_msense_rw_recovery(p, page_control == 1); 2338 break; 2339 2340 case CACHE_MPAGE: 2341 p += ata_msense_caching(args->id, p, page_control == 1); 2342 break; 2343 2344 case CONTROL_MPAGE: 2345 p += ata_msense_control(args->dev, p, page_control == 1); 2346 break; 2347 2348 case ALL_MPAGES: 2349 p += ata_msense_rw_recovery(p, page_control == 1); 2350 p += ata_msense_caching(args->id, p, page_control == 1); 2351 p += ata_msense_control(args->dev, p, page_control == 1); 2352 break; 2353 2354 default: /* invalid page code */ 2355 fp = 2; 2356 goto invalid_fld; 2357 } 2358 2359 dpofua = 0; 2360 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2361 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2362 dpofua = 1 << 4; 2363 2364 if (six_byte) { 2365 rbuf[0] = p - rbuf - 1; 2366 rbuf[2] |= dpofua; 2367 if (ebd) { 2368 rbuf[3] = sizeof(sat_blk_desc); 2369 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2370 } 2371 } else { 2372 unsigned int output_len = p - rbuf - 2; 2373 2374 rbuf[0] = output_len >> 8; 2375 rbuf[1] = output_len; 2376 rbuf[3] |= dpofua; 2377 if (ebd) { 2378 rbuf[7] = sizeof(sat_blk_desc); 2379 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2380 } 2381 } 2382 return 0; 2383 2384 invalid_fld: 2385 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2386 return 1; 2387 2388 saving_not_supp: 2389 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2390 /* "Saving parameters not supported" */ 2391 return 1; 2392 } 2393 2394 /** 2395 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2396 * @args: device IDENTIFY data / SCSI command of interest. 2397 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2398 * 2399 * Simulate READ CAPACITY commands. 2400 * 2401 * LOCKING: 2402 * None. 2403 */ 2404 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2405 { 2406 struct ata_device *dev = args->dev; 2407 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2408 u32 sector_size; /* physical sector size in bytes */ 2409 u8 log2_per_phys; 2410 u16 lowest_aligned; 2411 2412 sector_size = ata_id_logical_sector_size(dev->id); 2413 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2414 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2415 2416 VPRINTK("ENTER\n"); 2417 2418 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2419 if (last_lba >= 0xffffffffULL) 2420 last_lba = 0xffffffff; 2421 2422 /* sector count, 32-bit */ 2423 rbuf[0] = last_lba >> (8 * 3); 2424 rbuf[1] = last_lba >> (8 * 2); 2425 rbuf[2] = last_lba >> (8 * 1); 2426 rbuf[3] = last_lba; 2427 2428 /* sector size */ 2429 rbuf[4] = sector_size >> (8 * 3); 2430 rbuf[5] = sector_size >> (8 * 2); 2431 rbuf[6] = sector_size >> (8 * 1); 2432 rbuf[7] = sector_size; 2433 } else { 2434 /* sector count, 64-bit */ 2435 rbuf[0] = last_lba >> (8 * 7); 2436 rbuf[1] = last_lba >> (8 * 6); 2437 rbuf[2] = last_lba >> (8 * 5); 2438 rbuf[3] = last_lba >> (8 * 4); 2439 rbuf[4] = last_lba >> (8 * 3); 2440 rbuf[5] = last_lba >> (8 * 2); 2441 rbuf[6] = last_lba >> (8 * 1); 2442 rbuf[7] = last_lba; 2443 2444 /* sector size */ 2445 rbuf[ 8] = sector_size >> (8 * 3); 2446 rbuf[ 9] = sector_size >> (8 * 2); 2447 rbuf[10] = sector_size >> (8 * 1); 2448 rbuf[11] = sector_size; 2449 2450 rbuf[12] = 0; 2451 rbuf[13] = log2_per_phys; 2452 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2453 rbuf[15] = lowest_aligned; 2454 2455 if (ata_id_has_trim(args->id) && 2456 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2457 rbuf[14] |= 0x80; /* LBPME */ 2458 2459 if (ata_id_has_zero_after_trim(args->id) && 2460 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2461 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2462 rbuf[14] |= 0x40; /* LBPRZ */ 2463 } 2464 } 2465 if (ata_id_zoned_cap(args->id) || 2466 args->dev->class == ATA_DEV_ZAC) 2467 rbuf[12] = (1 << 4); /* RC_BASIS */ 2468 } 2469 return 0; 2470 } 2471 2472 /** 2473 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2474 * @args: device IDENTIFY data / SCSI command of interest. 2475 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2476 * 2477 * Simulate REPORT LUNS command. 2478 * 2479 * LOCKING: 2480 * spin_lock_irqsave(host lock) 2481 */ 2482 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2483 { 2484 VPRINTK("ENTER\n"); 2485 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2486 2487 return 0; 2488 } 2489 2490 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2491 { 2492 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2493 /* FIXME: not quite right; we don't want the 2494 * translation of taskfile registers into 2495 * a sense descriptors, since that's only 2496 * correct for ATA, not ATAPI 2497 */ 2498 ata_gen_passthru_sense(qc); 2499 } 2500 2501 ata_qc_done(qc); 2502 } 2503 2504 /* is it pointless to prefer PIO for "safety reasons"? */ 2505 static inline int ata_pio_use_silly(struct ata_port *ap) 2506 { 2507 return (ap->flags & ATA_FLAG_PIO_DMA); 2508 } 2509 2510 static void atapi_request_sense(struct ata_queued_cmd *qc) 2511 { 2512 struct ata_port *ap = qc->ap; 2513 struct scsi_cmnd *cmd = qc->scsicmd; 2514 2515 DPRINTK("ATAPI request sense\n"); 2516 2517 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2518 2519 #ifdef CONFIG_ATA_SFF 2520 if (ap->ops->sff_tf_read) 2521 ap->ops->sff_tf_read(ap, &qc->tf); 2522 #endif 2523 2524 /* fill these in, for the case where they are -not- overwritten */ 2525 cmd->sense_buffer[0] = 0x70; 2526 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2527 2528 ata_qc_reinit(qc); 2529 2530 /* setup sg table and init transfer direction */ 2531 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2532 ata_sg_init(qc, &qc->sgent, 1); 2533 qc->dma_dir = DMA_FROM_DEVICE; 2534 2535 memset(&qc->cdb, 0, qc->dev->cdb_len); 2536 qc->cdb[0] = REQUEST_SENSE; 2537 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2538 2539 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2540 qc->tf.command = ATA_CMD_PACKET; 2541 2542 if (ata_pio_use_silly(ap)) { 2543 qc->tf.protocol = ATAPI_PROT_DMA; 2544 qc->tf.feature |= ATAPI_PKT_DMA; 2545 } else { 2546 qc->tf.protocol = ATAPI_PROT_PIO; 2547 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2548 qc->tf.lbah = 0; 2549 } 2550 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2551 2552 qc->complete_fn = atapi_sense_complete; 2553 2554 ata_qc_issue(qc); 2555 2556 DPRINTK("EXIT\n"); 2557 } 2558 2559 /* 2560 * ATAPI devices typically report zero for their SCSI version, and sometimes 2561 * deviate from the spec WRT response data format. If SCSI version is 2562 * reported as zero like normal, then we make the following fixups: 2563 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2564 * modern device. 2565 * 2) Ensure response data format / ATAPI information are always correct. 2566 */ 2567 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2568 { 2569 u8 buf[4]; 2570 2571 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2572 if (buf[2] == 0) { 2573 buf[2] = 0x5; 2574 buf[3] = 0x32; 2575 } 2576 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2577 } 2578 2579 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2580 { 2581 struct scsi_cmnd *cmd = qc->scsicmd; 2582 unsigned int err_mask = qc->err_mask; 2583 2584 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2585 2586 /* handle completion from new EH */ 2587 if (unlikely(qc->ap->ops->error_handler && 2588 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2589 2590 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2591 /* FIXME: not quite right; we don't want the 2592 * translation of taskfile registers into a 2593 * sense descriptors, since that's only 2594 * correct for ATA, not ATAPI 2595 */ 2596 ata_gen_passthru_sense(qc); 2597 } 2598 2599 /* SCSI EH automatically locks door if sdev->locked is 2600 * set. Sometimes door lock request continues to 2601 * fail, for example, when no media is present. This 2602 * creates a loop - SCSI EH issues door lock which 2603 * fails and gets invoked again to acquire sense data 2604 * for the failed command. 2605 * 2606 * If door lock fails, always clear sdev->locked to 2607 * avoid this infinite loop. 2608 * 2609 * This may happen before SCSI scan is complete. Make 2610 * sure qc->dev->sdev isn't NULL before dereferencing. 2611 */ 2612 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2613 qc->dev->sdev->locked = 0; 2614 2615 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2616 ata_qc_done(qc); 2617 return; 2618 } 2619 2620 /* successful completion or old EH failure path */ 2621 if (unlikely(err_mask & AC_ERR_DEV)) { 2622 cmd->result = SAM_STAT_CHECK_CONDITION; 2623 atapi_request_sense(qc); 2624 return; 2625 } else if (unlikely(err_mask)) { 2626 /* FIXME: not quite right; we don't want the 2627 * translation of taskfile registers into 2628 * a sense descriptors, since that's only 2629 * correct for ATA, not ATAPI 2630 */ 2631 ata_gen_passthru_sense(qc); 2632 } else { 2633 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2634 atapi_fixup_inquiry(cmd); 2635 cmd->result = SAM_STAT_GOOD; 2636 } 2637 2638 ata_qc_done(qc); 2639 } 2640 /** 2641 * atapi_xlat - Initialize PACKET taskfile 2642 * @qc: command structure to be initialized 2643 * 2644 * LOCKING: 2645 * spin_lock_irqsave(host lock) 2646 * 2647 * RETURNS: 2648 * Zero on success, non-zero on failure. 2649 */ 2650 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2651 { 2652 struct scsi_cmnd *scmd = qc->scsicmd; 2653 struct ata_device *dev = qc->dev; 2654 int nodata = (scmd->sc_data_direction == DMA_NONE); 2655 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2656 unsigned int nbytes; 2657 2658 memset(qc->cdb, 0, dev->cdb_len); 2659 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2660 2661 qc->complete_fn = atapi_qc_complete; 2662 2663 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2664 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2665 qc->tf.flags |= ATA_TFLAG_WRITE; 2666 DPRINTK("direction: write\n"); 2667 } 2668 2669 qc->tf.command = ATA_CMD_PACKET; 2670 ata_qc_set_pc_nbytes(qc); 2671 2672 /* check whether ATAPI DMA is safe */ 2673 if (!nodata && !using_pio && atapi_check_dma(qc)) 2674 using_pio = 1; 2675 2676 /* Some controller variants snoop this value for Packet 2677 * transfers to do state machine and FIFO management. Thus we 2678 * want to set it properly, and for DMA where it is 2679 * effectively meaningless. 2680 */ 2681 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2682 2683 /* Most ATAPI devices which honor transfer chunk size don't 2684 * behave according to the spec when odd chunk size which 2685 * matches the transfer length is specified. If the number of 2686 * bytes to transfer is 2n+1. According to the spec, what 2687 * should happen is to indicate that 2n+1 is going to be 2688 * transferred and transfer 2n+2 bytes where the last byte is 2689 * padding. 2690 * 2691 * In practice, this doesn't happen. ATAPI devices first 2692 * indicate and transfer 2n bytes and then indicate and 2693 * transfer 2 bytes where the last byte is padding. 2694 * 2695 * This inconsistency confuses several controllers which 2696 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2697 * These controllers use actual number of transferred bytes to 2698 * update DMA pointer and transfer of 4n+2 bytes make those 2699 * controller push DMA pointer by 4n+4 bytes because SATA data 2700 * FISes are aligned to 4 bytes. This causes data corruption 2701 * and buffer overrun. 2702 * 2703 * Always setting nbytes to even number solves this problem 2704 * because then ATAPI devices don't have to split data at 2n 2705 * boundaries. 2706 */ 2707 if (nbytes & 0x1) 2708 nbytes++; 2709 2710 qc->tf.lbam = (nbytes & 0xFF); 2711 qc->tf.lbah = (nbytes >> 8); 2712 2713 if (nodata) 2714 qc->tf.protocol = ATAPI_PROT_NODATA; 2715 else if (using_pio) 2716 qc->tf.protocol = ATAPI_PROT_PIO; 2717 else { 2718 /* DMA data xfer */ 2719 qc->tf.protocol = ATAPI_PROT_DMA; 2720 qc->tf.feature |= ATAPI_PKT_DMA; 2721 2722 if ((dev->flags & ATA_DFLAG_DMADIR) && 2723 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2724 /* some SATA bridges need us to indicate data xfer direction */ 2725 qc->tf.feature |= ATAPI_DMADIR; 2726 } 2727 2728 2729 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2730 as ATAPI tape drives don't get this right otherwise */ 2731 return 0; 2732 } 2733 2734 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2735 { 2736 if (!sata_pmp_attached(ap)) { 2737 if (likely(devno >= 0 && 2738 devno < ata_link_max_devices(&ap->link))) 2739 return &ap->link.device[devno]; 2740 } else { 2741 if (likely(devno >= 0 && 2742 devno < ap->nr_pmp_links)) 2743 return &ap->pmp_link[devno].device[0]; 2744 } 2745 2746 return NULL; 2747 } 2748 2749 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2750 const struct scsi_device *scsidev) 2751 { 2752 int devno; 2753 2754 /* skip commands not addressed to targets we simulate */ 2755 if (!sata_pmp_attached(ap)) { 2756 if (unlikely(scsidev->channel || scsidev->lun)) 2757 return NULL; 2758 devno = scsidev->id; 2759 } else { 2760 if (unlikely(scsidev->id || scsidev->lun)) 2761 return NULL; 2762 devno = scsidev->channel; 2763 } 2764 2765 return ata_find_dev(ap, devno); 2766 } 2767 2768 /** 2769 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2770 * @ap: ATA port to which the device is attached 2771 * @scsidev: SCSI device from which we derive the ATA device 2772 * 2773 * Given various information provided in struct scsi_cmnd, 2774 * map that onto an ATA bus, and using that mapping 2775 * determine which ata_device is associated with the 2776 * SCSI command to be sent. 2777 * 2778 * LOCKING: 2779 * spin_lock_irqsave(host lock) 2780 * 2781 * RETURNS: 2782 * Associated ATA device, or %NULL if not found. 2783 */ 2784 struct ata_device * 2785 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2786 { 2787 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2788 2789 if (unlikely(!dev || !ata_dev_enabled(dev))) 2790 return NULL; 2791 2792 return dev; 2793 } 2794 2795 /* 2796 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2797 * @byte1: Byte 1 from pass-thru CDB. 2798 * 2799 * RETURNS: 2800 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2801 */ 2802 static u8 2803 ata_scsi_map_proto(u8 byte1) 2804 { 2805 switch((byte1 & 0x1e) >> 1) { 2806 case 3: /* Non-data */ 2807 return ATA_PROT_NODATA; 2808 2809 case 6: /* DMA */ 2810 case 10: /* UDMA Data-in */ 2811 case 11: /* UDMA Data-Out */ 2812 return ATA_PROT_DMA; 2813 2814 case 4: /* PIO Data-in */ 2815 case 5: /* PIO Data-out */ 2816 return ATA_PROT_PIO; 2817 2818 case 12: /* FPDMA */ 2819 return ATA_PROT_NCQ; 2820 2821 case 0: /* Hard Reset */ 2822 case 1: /* SRST */ 2823 case 8: /* Device Diagnostic */ 2824 case 9: /* Device Reset */ 2825 case 7: /* DMA Queued */ 2826 case 15: /* Return Response Info */ 2827 default: /* Reserved */ 2828 break; 2829 } 2830 2831 return ATA_PROT_UNKNOWN; 2832 } 2833 2834 /** 2835 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2836 * @qc: command structure to be initialized 2837 * 2838 * Handles either 12, 16, or 32-byte versions of the CDB. 2839 * 2840 * RETURNS: 2841 * Zero on success, non-zero on failure. 2842 */ 2843 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2844 { 2845 struct ata_taskfile *tf = &(qc->tf); 2846 struct scsi_cmnd *scmd = qc->scsicmd; 2847 struct ata_device *dev = qc->dev; 2848 const u8 *cdb = scmd->cmnd; 2849 u16 fp; 2850 u16 cdb_offset = 0; 2851 2852 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2853 if (cdb[0] == VARIABLE_LENGTH_CMD) 2854 cdb_offset = 9; 2855 2856 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2857 if (tf->protocol == ATA_PROT_UNKNOWN) { 2858 fp = 1; 2859 goto invalid_fld; 2860 } 2861 2862 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0) 2863 tf->protocol = ATA_PROT_NCQ_NODATA; 2864 2865 /* enable LBA */ 2866 tf->flags |= ATA_TFLAG_LBA; 2867 2868 /* 2869 * 12 and 16 byte CDBs use different offsets to 2870 * provide the various register values. 2871 */ 2872 if (cdb[0] == ATA_16) { 2873 /* 2874 * 16-byte CDB - may contain extended commands. 2875 * 2876 * If that is the case, copy the upper byte register values. 2877 */ 2878 if (cdb[1] & 0x01) { 2879 tf->hob_feature = cdb[3]; 2880 tf->hob_nsect = cdb[5]; 2881 tf->hob_lbal = cdb[7]; 2882 tf->hob_lbam = cdb[9]; 2883 tf->hob_lbah = cdb[11]; 2884 tf->flags |= ATA_TFLAG_LBA48; 2885 } else 2886 tf->flags &= ~ATA_TFLAG_LBA48; 2887 2888 /* 2889 * Always copy low byte, device and command registers. 2890 */ 2891 tf->feature = cdb[4]; 2892 tf->nsect = cdb[6]; 2893 tf->lbal = cdb[8]; 2894 tf->lbam = cdb[10]; 2895 tf->lbah = cdb[12]; 2896 tf->device = cdb[13]; 2897 tf->command = cdb[14]; 2898 } else if (cdb[0] == ATA_12) { 2899 /* 2900 * 12-byte CDB - incapable of extended commands. 2901 */ 2902 tf->flags &= ~ATA_TFLAG_LBA48; 2903 2904 tf->feature = cdb[3]; 2905 tf->nsect = cdb[4]; 2906 tf->lbal = cdb[5]; 2907 tf->lbam = cdb[6]; 2908 tf->lbah = cdb[7]; 2909 tf->device = cdb[8]; 2910 tf->command = cdb[9]; 2911 } else { 2912 /* 2913 * 32-byte CDB - may contain extended command fields. 2914 * 2915 * If that is the case, copy the upper byte register values. 2916 */ 2917 if (cdb[10] & 0x01) { 2918 tf->hob_feature = cdb[20]; 2919 tf->hob_nsect = cdb[22]; 2920 tf->hob_lbal = cdb[16]; 2921 tf->hob_lbam = cdb[15]; 2922 tf->hob_lbah = cdb[14]; 2923 tf->flags |= ATA_TFLAG_LBA48; 2924 } else 2925 tf->flags &= ~ATA_TFLAG_LBA48; 2926 2927 tf->feature = cdb[21]; 2928 tf->nsect = cdb[23]; 2929 tf->lbal = cdb[19]; 2930 tf->lbam = cdb[18]; 2931 tf->lbah = cdb[17]; 2932 tf->device = cdb[24]; 2933 tf->command = cdb[25]; 2934 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2935 } 2936 2937 /* For NCQ commands copy the tag value */ 2938 if (ata_is_ncq(tf->protocol)) 2939 tf->nsect = qc->hw_tag << 3; 2940 2941 /* enforce correct master/slave bit */ 2942 tf->device = dev->devno ? 2943 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2944 2945 switch (tf->command) { 2946 /* READ/WRITE LONG use a non-standard sect_size */ 2947 case ATA_CMD_READ_LONG: 2948 case ATA_CMD_READ_LONG_ONCE: 2949 case ATA_CMD_WRITE_LONG: 2950 case ATA_CMD_WRITE_LONG_ONCE: 2951 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 2952 fp = 1; 2953 goto invalid_fld; 2954 } 2955 qc->sect_size = scsi_bufflen(scmd); 2956 break; 2957 2958 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2959 case ATA_CMD_CFA_WRITE_NE: 2960 case ATA_CMD_CFA_TRANS_SECT: 2961 case ATA_CMD_CFA_WRITE_MULT_NE: 2962 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2963 case ATA_CMD_READ: 2964 case ATA_CMD_READ_EXT: 2965 case ATA_CMD_READ_QUEUED: 2966 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2967 case ATA_CMD_FPDMA_READ: 2968 case ATA_CMD_READ_MULTI: 2969 case ATA_CMD_READ_MULTI_EXT: 2970 case ATA_CMD_PIO_READ: 2971 case ATA_CMD_PIO_READ_EXT: 2972 case ATA_CMD_READ_STREAM_DMA_EXT: 2973 case ATA_CMD_READ_STREAM_EXT: 2974 case ATA_CMD_VERIFY: 2975 case ATA_CMD_VERIFY_EXT: 2976 case ATA_CMD_WRITE: 2977 case ATA_CMD_WRITE_EXT: 2978 case ATA_CMD_WRITE_FUA_EXT: 2979 case ATA_CMD_WRITE_QUEUED: 2980 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2981 case ATA_CMD_FPDMA_WRITE: 2982 case ATA_CMD_WRITE_MULTI: 2983 case ATA_CMD_WRITE_MULTI_EXT: 2984 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2985 case ATA_CMD_PIO_WRITE: 2986 case ATA_CMD_PIO_WRITE_EXT: 2987 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2988 case ATA_CMD_WRITE_STREAM_EXT: 2989 qc->sect_size = scmd->device->sector_size; 2990 break; 2991 2992 /* Everything else uses 512 byte "sectors" */ 2993 default: 2994 qc->sect_size = ATA_SECT_SIZE; 2995 } 2996 2997 /* 2998 * Set flags so that all registers will be written, pass on 2999 * write indication (used for PIO/DMA setup), result TF is 3000 * copied back and we don't whine too much about its failure. 3001 */ 3002 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3003 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3004 tf->flags |= ATA_TFLAG_WRITE; 3005 3006 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3007 3008 /* 3009 * Set transfer length. 3010 * 3011 * TODO: find out if we need to do more here to 3012 * cover scatter/gather case. 3013 */ 3014 ata_qc_set_pc_nbytes(qc); 3015 3016 /* We may not issue DMA commands if no DMA mode is set */ 3017 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3018 fp = 1; 3019 goto invalid_fld; 3020 } 3021 3022 /* We may not issue NCQ commands to devices not supporting NCQ */ 3023 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3024 fp = 1; 3025 goto invalid_fld; 3026 } 3027 3028 /* sanity check for pio multi commands */ 3029 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3030 fp = 1; 3031 goto invalid_fld; 3032 } 3033 3034 if (is_multi_taskfile(tf)) { 3035 unsigned int multi_count = 1 << (cdb[1] >> 5); 3036 3037 /* compare the passed through multi_count 3038 * with the cached multi_count of libata 3039 */ 3040 if (multi_count != dev->multi_count) 3041 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3042 multi_count); 3043 } 3044 3045 /* 3046 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3047 * SET_FEATURES - XFER MODE must be preceded/succeeded 3048 * by an update to hardware-specific registers for each 3049 * controller (i.e. the reason for ->set_piomode(), 3050 * ->set_dmamode(), and ->post_set_mode() hooks). 3051 */ 3052 if (tf->command == ATA_CMD_SET_FEATURES && 3053 tf->feature == SETFEATURES_XFER) { 3054 fp = (cdb[0] == ATA_16) ? 4 : 3; 3055 goto invalid_fld; 3056 } 3057 3058 /* 3059 * Filter TPM commands by default. These provide an 3060 * essentially uncontrolled encrypted "back door" between 3061 * applications and the disk. Set libata.allow_tpm=1 if you 3062 * have a real reason for wanting to use them. This ensures 3063 * that installed software cannot easily mess stuff up without 3064 * user intent. DVR type users will probably ship with this enabled 3065 * for movie content management. 3066 * 3067 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3068 * for this and should do in future but that it is not sufficient as 3069 * DCS is an optional feature set. Thus we also do the software filter 3070 * so that we comply with the TC consortium stated goal that the user 3071 * can turn off TC features of their system. 3072 */ 3073 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3074 fp = (cdb[0] == ATA_16) ? 14 : 9; 3075 goto invalid_fld; 3076 } 3077 3078 return 0; 3079 3080 invalid_fld: 3081 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3082 return 1; 3083 } 3084 3085 /** 3086 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3087 * @cmd: SCSI command being translated 3088 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3089 * @sector: Starting sector 3090 * @count: Total Range of request in logical sectors 3091 * 3092 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3093 * descriptor. 3094 * 3095 * Upto 64 entries of the format: 3096 * 63:48 Range Length 3097 * 47:0 LBA 3098 * 3099 * Range Length of 0 is ignored. 3100 * LBA's should be sorted order and not overlap. 3101 * 3102 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3103 * 3104 * Return: Number of bytes copied into sglist. 3105 */ 3106 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3107 u64 sector, u32 count) 3108 { 3109 struct scsi_device *sdp = cmd->device; 3110 size_t len = sdp->sector_size; 3111 size_t r; 3112 __le64 *buf; 3113 u32 i = 0; 3114 unsigned long flags; 3115 3116 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3117 3118 if (len > ATA_SCSI_RBUF_SIZE) 3119 len = ATA_SCSI_RBUF_SIZE; 3120 3121 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3122 buf = ((void *)ata_scsi_rbuf); 3123 memset(buf, 0, len); 3124 while (i < trmax) { 3125 u64 entry = sector | 3126 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3127 buf[i++] = __cpu_to_le64(entry); 3128 if (count <= 0xffff) 3129 break; 3130 count -= 0xffff; 3131 sector += 0xffff; 3132 } 3133 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3134 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3135 3136 return r; 3137 } 3138 3139 /** 3140 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3141 * @qc: Command to be translated 3142 * 3143 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3144 * an SCT Write Same command. 3145 * Based on WRITE SAME has the UNMAP flag: 3146 * 3147 * - When set translate to DSM TRIM 3148 * - When clear translate to SCT Write Same 3149 */ 3150 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3151 { 3152 struct ata_taskfile *tf = &qc->tf; 3153 struct scsi_cmnd *scmd = qc->scsicmd; 3154 struct scsi_device *sdp = scmd->device; 3155 size_t len = sdp->sector_size; 3156 struct ata_device *dev = qc->dev; 3157 const u8 *cdb = scmd->cmnd; 3158 u64 block; 3159 u32 n_block; 3160 const u32 trmax = len >> 3; 3161 u32 size; 3162 u16 fp; 3163 u8 bp = 0xff; 3164 u8 unmap = cdb[1] & 0x8; 3165 3166 /* we may not issue DMA commands if no DMA mode is set */ 3167 if (unlikely(!ata_dma_enabled(dev))) 3168 goto invalid_opcode; 3169 3170 /* 3171 * We only allow sending this command through the block layer, 3172 * as it modifies the DATA OUT buffer, which would corrupt user 3173 * memory for SG_IO commands. 3174 */ 3175 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3176 goto invalid_opcode; 3177 3178 if (unlikely(scmd->cmd_len < 16)) { 3179 fp = 15; 3180 goto invalid_fld; 3181 } 3182 scsi_16_lba_len(cdb, &block, &n_block); 3183 3184 if (!unmap || 3185 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3186 !ata_id_has_trim(dev->id)) { 3187 fp = 1; 3188 bp = 3; 3189 goto invalid_fld; 3190 } 3191 /* If the request is too large the cmd is invalid */ 3192 if (n_block > 0xffff * trmax) { 3193 fp = 2; 3194 goto invalid_fld; 3195 } 3196 3197 /* 3198 * WRITE SAME always has a sector sized buffer as payload, this 3199 * should never be a multiple entry S/G list. 3200 */ 3201 if (!scsi_sg_count(scmd)) 3202 goto invalid_param_len; 3203 3204 /* 3205 * size must match sector size in bytes 3206 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3207 * is defined as number of 512 byte blocks to be transferred. 3208 */ 3209 3210 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3211 if (size != len) 3212 goto invalid_param_len; 3213 3214 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3215 /* Newer devices support queued TRIM commands */ 3216 tf->protocol = ATA_PROT_NCQ; 3217 tf->command = ATA_CMD_FPDMA_SEND; 3218 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3219 tf->nsect = qc->hw_tag << 3; 3220 tf->hob_feature = (size / 512) >> 8; 3221 tf->feature = size / 512; 3222 3223 tf->auxiliary = 1; 3224 } else { 3225 tf->protocol = ATA_PROT_DMA; 3226 tf->hob_feature = 0; 3227 tf->feature = ATA_DSM_TRIM; 3228 tf->hob_nsect = (size / 512) >> 8; 3229 tf->nsect = size / 512; 3230 tf->command = ATA_CMD_DSM; 3231 } 3232 3233 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3234 ATA_TFLAG_WRITE; 3235 3236 ata_qc_set_pc_nbytes(qc); 3237 3238 return 0; 3239 3240 invalid_fld: 3241 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3242 return 1; 3243 invalid_param_len: 3244 /* "Parameter list length error" */ 3245 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3246 return 1; 3247 invalid_opcode: 3248 /* "Invalid command operation code" */ 3249 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3250 return 1; 3251 } 3252 3253 /** 3254 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3255 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3256 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3257 * 3258 * Yields a subset to satisfy scsi_report_opcode() 3259 * 3260 * LOCKING: 3261 * spin_lock_irqsave(host lock) 3262 */ 3263 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3264 { 3265 struct ata_device *dev = args->dev; 3266 u8 *cdb = args->cmd->cmnd; 3267 u8 supported = 0; 3268 unsigned int err = 0; 3269 3270 if (cdb[2] != 1) { 3271 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3272 err = 2; 3273 goto out; 3274 } 3275 switch (cdb[3]) { 3276 case INQUIRY: 3277 case MODE_SENSE: 3278 case MODE_SENSE_10: 3279 case READ_CAPACITY: 3280 case SERVICE_ACTION_IN_16: 3281 case REPORT_LUNS: 3282 case REQUEST_SENSE: 3283 case SYNCHRONIZE_CACHE: 3284 case REZERO_UNIT: 3285 case SEEK_6: 3286 case SEEK_10: 3287 case TEST_UNIT_READY: 3288 case SEND_DIAGNOSTIC: 3289 case MAINTENANCE_IN: 3290 case READ_6: 3291 case READ_10: 3292 case READ_16: 3293 case WRITE_6: 3294 case WRITE_10: 3295 case WRITE_16: 3296 case ATA_12: 3297 case ATA_16: 3298 case VERIFY: 3299 case VERIFY_16: 3300 case MODE_SELECT: 3301 case MODE_SELECT_10: 3302 case START_STOP: 3303 supported = 3; 3304 break; 3305 case ZBC_IN: 3306 case ZBC_OUT: 3307 if (ata_id_zoned_cap(dev->id) || 3308 dev->class == ATA_DEV_ZAC) 3309 supported = 3; 3310 break; 3311 case SECURITY_PROTOCOL_IN: 3312 case SECURITY_PROTOCOL_OUT: 3313 if (dev->flags & ATA_DFLAG_TRUSTED) 3314 supported = 3; 3315 break; 3316 default: 3317 break; 3318 } 3319 out: 3320 rbuf[1] = supported; /* supported */ 3321 return err; 3322 } 3323 3324 /** 3325 * ata_scsi_report_zones_complete - convert ATA output 3326 * @qc: command structure returning the data 3327 * 3328 * Convert T-13 little-endian field representation into 3329 * T-10 big-endian field representation. 3330 * What a mess. 3331 */ 3332 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3333 { 3334 struct scsi_cmnd *scmd = qc->scsicmd; 3335 struct sg_mapping_iter miter; 3336 unsigned long flags; 3337 unsigned int bytes = 0; 3338 3339 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3340 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3341 3342 local_irq_save(flags); 3343 while (sg_miter_next(&miter)) { 3344 unsigned int offset = 0; 3345 3346 if (bytes == 0) { 3347 char *hdr; 3348 u32 list_length; 3349 u64 max_lba, opt_lba; 3350 u16 same; 3351 3352 /* Swizzle header */ 3353 hdr = miter.addr; 3354 list_length = get_unaligned_le32(&hdr[0]); 3355 same = get_unaligned_le16(&hdr[4]); 3356 max_lba = get_unaligned_le64(&hdr[8]); 3357 opt_lba = get_unaligned_le64(&hdr[16]); 3358 put_unaligned_be32(list_length, &hdr[0]); 3359 hdr[4] = same & 0xf; 3360 put_unaligned_be64(max_lba, &hdr[8]); 3361 put_unaligned_be64(opt_lba, &hdr[16]); 3362 offset += 64; 3363 bytes += 64; 3364 } 3365 while (offset < miter.length) { 3366 char *rec; 3367 u8 cond, type, non_seq, reset; 3368 u64 size, start, wp; 3369 3370 /* Swizzle zone descriptor */ 3371 rec = miter.addr + offset; 3372 type = rec[0] & 0xf; 3373 cond = (rec[1] >> 4) & 0xf; 3374 non_seq = (rec[1] & 2); 3375 reset = (rec[1] & 1); 3376 size = get_unaligned_le64(&rec[8]); 3377 start = get_unaligned_le64(&rec[16]); 3378 wp = get_unaligned_le64(&rec[24]); 3379 rec[0] = type; 3380 rec[1] = (cond << 4) | non_seq | reset; 3381 put_unaligned_be64(size, &rec[8]); 3382 put_unaligned_be64(start, &rec[16]); 3383 put_unaligned_be64(wp, &rec[24]); 3384 WARN_ON(offset + 64 > miter.length); 3385 offset += 64; 3386 bytes += 64; 3387 } 3388 } 3389 sg_miter_stop(&miter); 3390 local_irq_restore(flags); 3391 3392 ata_scsi_qc_complete(qc); 3393 } 3394 3395 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3396 { 3397 struct ata_taskfile *tf = &qc->tf; 3398 struct scsi_cmnd *scmd = qc->scsicmd; 3399 const u8 *cdb = scmd->cmnd; 3400 u16 sect, fp = (u16)-1; 3401 u8 sa, options, bp = 0xff; 3402 u64 block; 3403 u32 n_block; 3404 3405 if (unlikely(scmd->cmd_len < 16)) { 3406 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3407 scmd->cmd_len); 3408 fp = 15; 3409 goto invalid_fld; 3410 } 3411 scsi_16_lba_len(cdb, &block, &n_block); 3412 if (n_block != scsi_bufflen(scmd)) { 3413 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3414 n_block, scsi_bufflen(scmd)); 3415 goto invalid_param_len; 3416 } 3417 sa = cdb[1] & 0x1f; 3418 if (sa != ZI_REPORT_ZONES) { 3419 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3420 fp = 1; 3421 goto invalid_fld; 3422 } 3423 /* 3424 * ZAC allows only for transfers in 512 byte blocks, 3425 * and uses a 16 bit value for the transfer count. 3426 */ 3427 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3428 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3429 goto invalid_param_len; 3430 } 3431 sect = n_block / 512; 3432 options = cdb[14] & 0xbf; 3433 3434 if (ata_ncq_enabled(qc->dev) && 3435 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3436 tf->protocol = ATA_PROT_NCQ; 3437 tf->command = ATA_CMD_FPDMA_RECV; 3438 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3439 tf->nsect = qc->hw_tag << 3; 3440 tf->feature = sect & 0xff; 3441 tf->hob_feature = (sect >> 8) & 0xff; 3442 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3443 } else { 3444 tf->command = ATA_CMD_ZAC_MGMT_IN; 3445 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3446 tf->protocol = ATA_PROT_DMA; 3447 tf->hob_feature = options; 3448 tf->hob_nsect = (sect >> 8) & 0xff; 3449 tf->nsect = sect & 0xff; 3450 } 3451 tf->device = ATA_LBA; 3452 tf->lbah = (block >> 16) & 0xff; 3453 tf->lbam = (block >> 8) & 0xff; 3454 tf->lbal = block & 0xff; 3455 tf->hob_lbah = (block >> 40) & 0xff; 3456 tf->hob_lbam = (block >> 32) & 0xff; 3457 tf->hob_lbal = (block >> 24) & 0xff; 3458 3459 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3460 qc->flags |= ATA_QCFLAG_RESULT_TF; 3461 3462 ata_qc_set_pc_nbytes(qc); 3463 3464 qc->complete_fn = ata_scsi_report_zones_complete; 3465 3466 return 0; 3467 3468 invalid_fld: 3469 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3470 return 1; 3471 3472 invalid_param_len: 3473 /* "Parameter list length error" */ 3474 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3475 return 1; 3476 } 3477 3478 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3479 { 3480 struct ata_taskfile *tf = &qc->tf; 3481 struct scsi_cmnd *scmd = qc->scsicmd; 3482 struct ata_device *dev = qc->dev; 3483 const u8 *cdb = scmd->cmnd; 3484 u8 all, sa; 3485 u64 block; 3486 u32 n_block; 3487 u16 fp = (u16)-1; 3488 3489 if (unlikely(scmd->cmd_len < 16)) { 3490 fp = 15; 3491 goto invalid_fld; 3492 } 3493 3494 sa = cdb[1] & 0x1f; 3495 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3496 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3497 fp = 1; 3498 goto invalid_fld; 3499 } 3500 3501 scsi_16_lba_len(cdb, &block, &n_block); 3502 if (n_block) { 3503 /* 3504 * ZAC MANAGEMENT OUT doesn't define any length 3505 */ 3506 goto invalid_param_len; 3507 } 3508 3509 all = cdb[14] & 0x1; 3510 if (all) { 3511 /* 3512 * Ignore the block address (zone ID) as defined by ZBC. 3513 */ 3514 block = 0; 3515 } else if (block >= dev->n_sectors) { 3516 /* 3517 * Block must be a valid zone ID (a zone start LBA). 3518 */ 3519 fp = 2; 3520 goto invalid_fld; 3521 } 3522 3523 if (ata_ncq_enabled(qc->dev) && 3524 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3525 tf->protocol = ATA_PROT_NCQ_NODATA; 3526 tf->command = ATA_CMD_NCQ_NON_DATA; 3527 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3528 tf->nsect = qc->hw_tag << 3; 3529 tf->auxiliary = sa | ((u16)all << 8); 3530 } else { 3531 tf->protocol = ATA_PROT_NODATA; 3532 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3533 tf->feature = sa; 3534 tf->hob_feature = all; 3535 } 3536 tf->lbah = (block >> 16) & 0xff; 3537 tf->lbam = (block >> 8) & 0xff; 3538 tf->lbal = block & 0xff; 3539 tf->hob_lbah = (block >> 40) & 0xff; 3540 tf->hob_lbam = (block >> 32) & 0xff; 3541 tf->hob_lbal = (block >> 24) & 0xff; 3542 tf->device = ATA_LBA; 3543 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3544 3545 return 0; 3546 3547 invalid_fld: 3548 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3549 return 1; 3550 invalid_param_len: 3551 /* "Parameter list length error" */ 3552 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3553 return 1; 3554 } 3555 3556 /** 3557 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3558 * @qc: Storage for translated ATA taskfile 3559 * @buf: input buffer 3560 * @len: number of valid bytes in the input buffer 3561 * @fp: out parameter for the failed field on error 3562 * 3563 * Prepare a taskfile to modify caching information for the device. 3564 * 3565 * LOCKING: 3566 * None. 3567 */ 3568 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3569 const u8 *buf, int len, u16 *fp) 3570 { 3571 struct ata_taskfile *tf = &qc->tf; 3572 struct ata_device *dev = qc->dev; 3573 u8 mpage[CACHE_MPAGE_LEN]; 3574 u8 wce; 3575 int i; 3576 3577 /* 3578 * The first two bytes of def_cache_mpage are a header, so offsets 3579 * in mpage are off by 2 compared to buf. Same for len. 3580 */ 3581 3582 if (len != CACHE_MPAGE_LEN - 2) { 3583 if (len < CACHE_MPAGE_LEN - 2) 3584 *fp = len; 3585 else 3586 *fp = CACHE_MPAGE_LEN - 2; 3587 return -EINVAL; 3588 } 3589 3590 wce = buf[0] & (1 << 2); 3591 3592 /* 3593 * Check that read-only bits are not modified. 3594 */ 3595 ata_msense_caching(dev->id, mpage, false); 3596 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3597 if (i == 0) 3598 continue; 3599 if (mpage[i + 2] != buf[i]) { 3600 *fp = i; 3601 return -EINVAL; 3602 } 3603 } 3604 3605 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3606 tf->protocol = ATA_PROT_NODATA; 3607 tf->nsect = 0; 3608 tf->command = ATA_CMD_SET_FEATURES; 3609 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3610 return 0; 3611 } 3612 3613 /** 3614 * ata_mselect_control - Simulate MODE SELECT for control page 3615 * @qc: Storage for translated ATA taskfile 3616 * @buf: input buffer 3617 * @len: number of valid bytes in the input buffer 3618 * @fp: out parameter for the failed field on error 3619 * 3620 * Prepare a taskfile to modify caching information for the device. 3621 * 3622 * LOCKING: 3623 * None. 3624 */ 3625 static int ata_mselect_control(struct ata_queued_cmd *qc, 3626 const u8 *buf, int len, u16 *fp) 3627 { 3628 struct ata_device *dev = qc->dev; 3629 u8 mpage[CONTROL_MPAGE_LEN]; 3630 u8 d_sense; 3631 int i; 3632 3633 /* 3634 * The first two bytes of def_control_mpage are a header, so offsets 3635 * in mpage are off by 2 compared to buf. Same for len. 3636 */ 3637 3638 if (len != CONTROL_MPAGE_LEN - 2) { 3639 if (len < CONTROL_MPAGE_LEN - 2) 3640 *fp = len; 3641 else 3642 *fp = CONTROL_MPAGE_LEN - 2; 3643 return -EINVAL; 3644 } 3645 3646 d_sense = buf[0] & (1 << 2); 3647 3648 /* 3649 * Check that read-only bits are not modified. 3650 */ 3651 ata_msense_control(dev, mpage, false); 3652 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3653 if (i == 0) 3654 continue; 3655 if (mpage[2 + i] != buf[i]) { 3656 *fp = i; 3657 return -EINVAL; 3658 } 3659 } 3660 if (d_sense & (1 << 2)) 3661 dev->flags |= ATA_DFLAG_D_SENSE; 3662 else 3663 dev->flags &= ~ATA_DFLAG_D_SENSE; 3664 return 0; 3665 } 3666 3667 /** 3668 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3669 * @qc: Storage for translated ATA taskfile 3670 * 3671 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3672 * Assume this is invoked for direct access devices (e.g. disks) only. 3673 * There should be no block descriptor for other device types. 3674 * 3675 * LOCKING: 3676 * spin_lock_irqsave(host lock) 3677 */ 3678 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3679 { 3680 struct scsi_cmnd *scmd = qc->scsicmd; 3681 const u8 *cdb = scmd->cmnd; 3682 u8 pg, spg; 3683 unsigned six_byte, pg_len, hdr_len, bd_len; 3684 int len; 3685 u16 fp = (u16)-1; 3686 u8 bp = 0xff; 3687 u8 buffer[64]; 3688 const u8 *p = buffer; 3689 3690 VPRINTK("ENTER\n"); 3691 3692 six_byte = (cdb[0] == MODE_SELECT); 3693 if (six_byte) { 3694 if (scmd->cmd_len < 5) { 3695 fp = 4; 3696 goto invalid_fld; 3697 } 3698 3699 len = cdb[4]; 3700 hdr_len = 4; 3701 } else { 3702 if (scmd->cmd_len < 9) { 3703 fp = 8; 3704 goto invalid_fld; 3705 } 3706 3707 len = (cdb[7] << 8) + cdb[8]; 3708 hdr_len = 8; 3709 } 3710 3711 /* We only support PF=1, SP=0. */ 3712 if ((cdb[1] & 0x11) != 0x10) { 3713 fp = 1; 3714 bp = (cdb[1] & 0x01) ? 1 : 5; 3715 goto invalid_fld; 3716 } 3717 3718 /* Test early for possible overrun. */ 3719 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3720 goto invalid_param_len; 3721 3722 /* Move past header and block descriptors. */ 3723 if (len < hdr_len) 3724 goto invalid_param_len; 3725 3726 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3727 buffer, sizeof(buffer))) 3728 goto invalid_param_len; 3729 3730 if (six_byte) 3731 bd_len = p[3]; 3732 else 3733 bd_len = (p[6] << 8) + p[7]; 3734 3735 len -= hdr_len; 3736 p += hdr_len; 3737 if (len < bd_len) 3738 goto invalid_param_len; 3739 if (bd_len != 0 && bd_len != 8) { 3740 fp = (six_byte) ? 3 : 6; 3741 fp += bd_len + hdr_len; 3742 goto invalid_param; 3743 } 3744 3745 len -= bd_len; 3746 p += bd_len; 3747 if (len == 0) 3748 goto skip; 3749 3750 /* Parse both possible formats for the mode page headers. */ 3751 pg = p[0] & 0x3f; 3752 if (p[0] & 0x40) { 3753 if (len < 4) 3754 goto invalid_param_len; 3755 3756 spg = p[1]; 3757 pg_len = (p[2] << 8) | p[3]; 3758 p += 4; 3759 len -= 4; 3760 } else { 3761 if (len < 2) 3762 goto invalid_param_len; 3763 3764 spg = 0; 3765 pg_len = p[1]; 3766 p += 2; 3767 len -= 2; 3768 } 3769 3770 /* 3771 * No mode subpages supported (yet) but asking for _all_ 3772 * subpages may be valid 3773 */ 3774 if (spg && (spg != ALL_SUB_MPAGES)) { 3775 fp = (p[0] & 0x40) ? 1 : 0; 3776 fp += hdr_len + bd_len; 3777 goto invalid_param; 3778 } 3779 if (pg_len > len) 3780 goto invalid_param_len; 3781 3782 switch (pg) { 3783 case CACHE_MPAGE: 3784 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3785 fp += hdr_len + bd_len; 3786 goto invalid_param; 3787 } 3788 break; 3789 case CONTROL_MPAGE: 3790 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 3791 fp += hdr_len + bd_len; 3792 goto invalid_param; 3793 } else { 3794 goto skip; /* No ATA command to send */ 3795 } 3796 break; 3797 default: /* invalid page code */ 3798 fp = bd_len + hdr_len; 3799 goto invalid_param; 3800 } 3801 3802 /* 3803 * Only one page has changeable data, so we only support setting one 3804 * page at a time. 3805 */ 3806 if (len > pg_len) 3807 goto invalid_param; 3808 3809 return 0; 3810 3811 invalid_fld: 3812 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3813 return 1; 3814 3815 invalid_param: 3816 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3817 return 1; 3818 3819 invalid_param_len: 3820 /* "Parameter list length error" */ 3821 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3822 return 1; 3823 3824 skip: 3825 scmd->result = SAM_STAT_GOOD; 3826 return 1; 3827 } 3828 3829 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3830 { 3831 if (len == 0) 3832 return ATA_CMD_TRUSTED_NONDATA; 3833 else if (send) 3834 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 3835 else 3836 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 3837 } 3838 3839 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 3840 { 3841 struct scsi_cmnd *scmd = qc->scsicmd; 3842 const u8 *cdb = scmd->cmnd; 3843 struct ata_taskfile *tf = &qc->tf; 3844 u8 secp = cdb[1]; 3845 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 3846 u16 spsp = get_unaligned_be16(&cdb[2]); 3847 u32 len = get_unaligned_be32(&cdb[6]); 3848 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 3849 3850 /* 3851 * We don't support the ATA "security" protocol. 3852 */ 3853 if (secp == 0xef) { 3854 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 3855 return 1; 3856 } 3857 3858 if (cdb[4] & 7) { /* INC_512 */ 3859 if (len > 0xffff) { 3860 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3861 return 1; 3862 } 3863 } else { 3864 if (len > 0x01fffe00) { 3865 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3866 return 1; 3867 } 3868 3869 /* convert to the sector-based ATA addressing */ 3870 len = (len + 511) / 512; 3871 } 3872 3873 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 3874 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 3875 if (send) 3876 tf->flags |= ATA_TFLAG_WRITE; 3877 tf->command = ata_scsi_trusted_op(len, send, dma); 3878 tf->feature = secp; 3879 tf->lbam = spsp & 0xff; 3880 tf->lbah = spsp >> 8; 3881 3882 if (len) { 3883 tf->nsect = len & 0xff; 3884 tf->lbal = len >> 8; 3885 } else { 3886 if (!send) 3887 tf->lbah = (1 << 7); 3888 } 3889 3890 ata_qc_set_pc_nbytes(qc); 3891 return 0; 3892 } 3893 3894 /** 3895 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 3896 * @qc: Command to be translated 3897 * 3898 * Translate a SCSI variable length CDB to specified commands. 3899 * It checks a service action value in CDB to call corresponding handler. 3900 * 3901 * RETURNS: 3902 * Zero on success, non-zero on failure 3903 * 3904 */ 3905 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 3906 { 3907 struct scsi_cmnd *scmd = qc->scsicmd; 3908 const u8 *cdb = scmd->cmnd; 3909 const u16 sa = get_unaligned_be16(&cdb[8]); 3910 3911 /* 3912 * if service action represents a ata pass-thru(32) command, 3913 * then pass it to ata_scsi_pass_thru handler. 3914 */ 3915 if (sa == ATA_32) 3916 return ata_scsi_pass_thru(qc); 3917 3918 /* unsupported service action */ 3919 return 1; 3920 } 3921 3922 /** 3923 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3924 * @dev: ATA device 3925 * @cmd: SCSI command opcode to consider 3926 * 3927 * Look up the SCSI command given, and determine whether the 3928 * SCSI command is to be translated or simulated. 3929 * 3930 * RETURNS: 3931 * Pointer to translation function if possible, %NULL if not. 3932 */ 3933 3934 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3935 { 3936 switch (cmd) { 3937 case READ_6: 3938 case READ_10: 3939 case READ_16: 3940 3941 case WRITE_6: 3942 case WRITE_10: 3943 case WRITE_16: 3944 return ata_scsi_rw_xlat; 3945 3946 case WRITE_SAME_16: 3947 return ata_scsi_write_same_xlat; 3948 3949 case SYNCHRONIZE_CACHE: 3950 if (ata_try_flush_cache(dev)) 3951 return ata_scsi_flush_xlat; 3952 break; 3953 3954 case VERIFY: 3955 case VERIFY_16: 3956 return ata_scsi_verify_xlat; 3957 3958 case ATA_12: 3959 case ATA_16: 3960 return ata_scsi_pass_thru; 3961 3962 case VARIABLE_LENGTH_CMD: 3963 return ata_scsi_var_len_cdb_xlat; 3964 3965 case MODE_SELECT: 3966 case MODE_SELECT_10: 3967 return ata_scsi_mode_select_xlat; 3968 break; 3969 3970 case ZBC_IN: 3971 return ata_scsi_zbc_in_xlat; 3972 3973 case ZBC_OUT: 3974 return ata_scsi_zbc_out_xlat; 3975 3976 case SECURITY_PROTOCOL_IN: 3977 case SECURITY_PROTOCOL_OUT: 3978 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 3979 break; 3980 return ata_scsi_security_inout_xlat; 3981 3982 case START_STOP: 3983 return ata_scsi_start_stop_xlat; 3984 } 3985 3986 return NULL; 3987 } 3988 3989 /** 3990 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 3991 * @ap: ATA port to which the command was being sent 3992 * @cmd: SCSI command to dump 3993 * 3994 * Prints the contents of a SCSI command via printk(). 3995 */ 3996 3997 void ata_scsi_dump_cdb(struct ata_port *ap, struct scsi_cmnd *cmd) 3998 { 3999 #ifdef ATA_VERBOSE_DEBUG 4000 struct scsi_device *scsidev = cmd->device; 4001 4002 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n", 4003 ap->print_id, 4004 scsidev->channel, scsidev->id, scsidev->lun, 4005 cmd->cmnd); 4006 #endif 4007 } 4008 4009 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4010 { 4011 u8 scsi_op = scmd->cmnd[0]; 4012 ata_xlat_func_t xlat_func; 4013 int rc = 0; 4014 4015 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4016 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 4017 goto bad_cdb_len; 4018 4019 xlat_func = ata_get_xlat_func(dev, scsi_op); 4020 } else { 4021 if (unlikely(!scmd->cmd_len)) 4022 goto bad_cdb_len; 4023 4024 xlat_func = NULL; 4025 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4026 /* relay SCSI command to ATAPI device */ 4027 int len = COMMAND_SIZE(scsi_op); 4028 if (unlikely(len > scmd->cmd_len || 4029 len > dev->cdb_len || 4030 scmd->cmd_len > ATAPI_CDB_LEN)) 4031 goto bad_cdb_len; 4032 4033 xlat_func = atapi_xlat; 4034 } else { 4035 /* ATA_16 passthru, treat as an ATA command */ 4036 if (unlikely(scmd->cmd_len > 16)) 4037 goto bad_cdb_len; 4038 4039 xlat_func = ata_get_xlat_func(dev, scsi_op); 4040 } 4041 } 4042 4043 if (xlat_func) 4044 rc = ata_scsi_translate(dev, scmd, xlat_func); 4045 else 4046 ata_scsi_simulate(dev, scmd); 4047 4048 return rc; 4049 4050 bad_cdb_len: 4051 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4052 scmd->cmd_len, scsi_op, dev->cdb_len); 4053 scmd->result = DID_ERROR << 16; 4054 scsi_done(scmd); 4055 return 0; 4056 } 4057 4058 /** 4059 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4060 * @shost: SCSI host of command to be sent 4061 * @cmd: SCSI command to be sent 4062 * 4063 * In some cases, this function translates SCSI commands into 4064 * ATA taskfiles, and queues the taskfiles to be sent to 4065 * hardware. In other cases, this function simulates a 4066 * SCSI device by evaluating and responding to certain 4067 * SCSI commands. This creates the overall effect of 4068 * ATA and ATAPI devices appearing as SCSI devices. 4069 * 4070 * LOCKING: 4071 * ATA host lock 4072 * 4073 * RETURNS: 4074 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4075 * 0 otherwise. 4076 */ 4077 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4078 { 4079 struct ata_port *ap; 4080 struct ata_device *dev; 4081 struct scsi_device *scsidev = cmd->device; 4082 int rc = 0; 4083 unsigned long irq_flags; 4084 4085 ap = ata_shost_to_port(shost); 4086 4087 spin_lock_irqsave(ap->lock, irq_flags); 4088 4089 ata_scsi_dump_cdb(ap, cmd); 4090 4091 dev = ata_scsi_find_dev(ap, scsidev); 4092 if (likely(dev)) 4093 rc = __ata_scsi_queuecmd(cmd, dev); 4094 else { 4095 cmd->result = (DID_BAD_TARGET << 16); 4096 scsi_done(cmd); 4097 } 4098 4099 spin_unlock_irqrestore(ap->lock, irq_flags); 4100 4101 return rc; 4102 } 4103 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4104 4105 /** 4106 * ata_scsi_simulate - simulate SCSI command on ATA device 4107 * @dev: the target device 4108 * @cmd: SCSI command being sent to device. 4109 * 4110 * Interprets and directly executes a select list of SCSI commands 4111 * that can be handled internally. 4112 * 4113 * LOCKING: 4114 * spin_lock_irqsave(host lock) 4115 */ 4116 4117 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4118 { 4119 struct ata_scsi_args args; 4120 const u8 *scsicmd = cmd->cmnd; 4121 u8 tmp8; 4122 4123 args.dev = dev; 4124 args.id = dev->id; 4125 args.cmd = cmd; 4126 4127 switch(scsicmd[0]) { 4128 case INQUIRY: 4129 if (scsicmd[1] & 2) /* is CmdDt set? */ 4130 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4131 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4132 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4133 else switch (scsicmd[2]) { 4134 case 0x00: 4135 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4136 break; 4137 case 0x80: 4138 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4139 break; 4140 case 0x83: 4141 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4142 break; 4143 case 0x89: 4144 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4145 break; 4146 case 0xb0: 4147 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4148 break; 4149 case 0xb1: 4150 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4151 break; 4152 case 0xb2: 4153 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4154 break; 4155 case 0xb6: 4156 if (dev->flags & ATA_DFLAG_ZAC) 4157 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4158 else 4159 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4160 break; 4161 case 0xb9: 4162 if (dev->cpr_log) 4163 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4164 else 4165 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4166 break; 4167 default: 4168 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4169 break; 4170 } 4171 break; 4172 4173 case MODE_SENSE: 4174 case MODE_SENSE_10: 4175 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4176 break; 4177 4178 case READ_CAPACITY: 4179 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4180 break; 4181 4182 case SERVICE_ACTION_IN_16: 4183 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4184 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4185 else 4186 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4187 break; 4188 4189 case REPORT_LUNS: 4190 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4191 break; 4192 4193 case REQUEST_SENSE: 4194 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4195 break; 4196 4197 /* if we reach this, then writeback caching is disabled, 4198 * turning this into a no-op. 4199 */ 4200 case SYNCHRONIZE_CACHE: 4201 fallthrough; 4202 4203 /* no-op's, complete with success */ 4204 case REZERO_UNIT: 4205 case SEEK_6: 4206 case SEEK_10: 4207 case TEST_UNIT_READY: 4208 break; 4209 4210 case SEND_DIAGNOSTIC: 4211 tmp8 = scsicmd[1] & ~(1 << 3); 4212 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4213 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4214 break; 4215 4216 case MAINTENANCE_IN: 4217 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4218 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4219 else 4220 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4221 break; 4222 4223 /* all other commands */ 4224 default: 4225 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4226 /* "Invalid command operation code" */ 4227 break; 4228 } 4229 4230 scsi_done(cmd); 4231 } 4232 4233 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4234 { 4235 int i, rc; 4236 4237 for (i = 0; i < host->n_ports; i++) { 4238 struct ata_port *ap = host->ports[i]; 4239 struct Scsi_Host *shost; 4240 4241 rc = -ENOMEM; 4242 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4243 if (!shost) 4244 goto err_alloc; 4245 4246 shost->eh_noresume = 1; 4247 *(struct ata_port **)&shost->hostdata[0] = ap; 4248 ap->scsi_host = shost; 4249 4250 shost->transportt = ata_scsi_transport_template; 4251 shost->unique_id = ap->print_id; 4252 shost->max_id = 16; 4253 shost->max_lun = 1; 4254 shost->max_channel = 1; 4255 shost->max_cmd_len = 32; 4256 4257 /* Schedule policy is determined by ->qc_defer() 4258 * callback and it needs to see every deferred qc. 4259 * Set host_blocked to 1 to prevent SCSI midlayer from 4260 * automatically deferring requests. 4261 */ 4262 shost->max_host_blocked = 1; 4263 4264 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4265 if (rc) 4266 goto err_alloc; 4267 } 4268 4269 return 0; 4270 4271 err_alloc: 4272 while (--i >= 0) { 4273 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4274 4275 /* scsi_host_put() is in ata_devres_release() */ 4276 scsi_remove_host(shost); 4277 } 4278 return rc; 4279 } 4280 4281 #ifdef CONFIG_OF 4282 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4283 { 4284 struct scsi_device *sdev = dev->sdev; 4285 struct device *d = ap->host->dev; 4286 struct device_node *np = d->of_node; 4287 struct device_node *child; 4288 4289 for_each_available_child_of_node(np, child) { 4290 int ret; 4291 u32 val; 4292 4293 ret = of_property_read_u32(child, "reg", &val); 4294 if (ret) 4295 continue; 4296 if (val == dev->devno) { 4297 dev_dbg(d, "found matching device node\n"); 4298 sdev->sdev_gendev.of_node = child; 4299 return; 4300 } 4301 } 4302 } 4303 #else 4304 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4305 { 4306 } 4307 #endif 4308 4309 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4310 { 4311 int tries = 5; 4312 struct ata_device *last_failed_dev = NULL; 4313 struct ata_link *link; 4314 struct ata_device *dev; 4315 4316 repeat: 4317 ata_for_each_link(link, ap, EDGE) { 4318 ata_for_each_dev(dev, link, ENABLED) { 4319 struct scsi_device *sdev; 4320 int channel = 0, id = 0; 4321 4322 if (dev->sdev) 4323 continue; 4324 4325 if (ata_is_host_link(link)) 4326 id = dev->devno; 4327 else 4328 channel = link->pmp; 4329 4330 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4331 NULL); 4332 if (!IS_ERR(sdev)) { 4333 dev->sdev = sdev; 4334 ata_scsi_assign_ofnode(dev, ap); 4335 scsi_device_put(sdev); 4336 } else { 4337 dev->sdev = NULL; 4338 } 4339 } 4340 } 4341 4342 /* If we scanned while EH was in progress or allocation 4343 * failure occurred, scan would have failed silently. Check 4344 * whether all devices are attached. 4345 */ 4346 ata_for_each_link(link, ap, EDGE) { 4347 ata_for_each_dev(dev, link, ENABLED) { 4348 if (!dev->sdev) 4349 goto exit_loop; 4350 } 4351 } 4352 exit_loop: 4353 if (!link) 4354 return; 4355 4356 /* we're missing some SCSI devices */ 4357 if (sync) { 4358 /* If caller requested synchrnous scan && we've made 4359 * any progress, sleep briefly and repeat. 4360 */ 4361 if (dev != last_failed_dev) { 4362 msleep(100); 4363 last_failed_dev = dev; 4364 goto repeat; 4365 } 4366 4367 /* We might be failing to detect boot device, give it 4368 * a few more chances. 4369 */ 4370 if (--tries) { 4371 msleep(100); 4372 goto repeat; 4373 } 4374 4375 ata_port_err(ap, 4376 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4377 } 4378 4379 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4380 round_jiffies_relative(HZ)); 4381 } 4382 4383 /** 4384 * ata_scsi_offline_dev - offline attached SCSI device 4385 * @dev: ATA device to offline attached SCSI device for 4386 * 4387 * This function is called from ata_eh_hotplug() and responsible 4388 * for taking the SCSI device attached to @dev offline. This 4389 * function is called with host lock which protects dev->sdev 4390 * against clearing. 4391 * 4392 * LOCKING: 4393 * spin_lock_irqsave(host lock) 4394 * 4395 * RETURNS: 4396 * 1 if attached SCSI device exists, 0 otherwise. 4397 */ 4398 int ata_scsi_offline_dev(struct ata_device *dev) 4399 { 4400 if (dev->sdev) { 4401 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4402 return 1; 4403 } 4404 return 0; 4405 } 4406 4407 /** 4408 * ata_scsi_remove_dev - remove attached SCSI device 4409 * @dev: ATA device to remove attached SCSI device for 4410 * 4411 * This function is called from ata_eh_scsi_hotplug() and 4412 * responsible for removing the SCSI device attached to @dev. 4413 * 4414 * LOCKING: 4415 * Kernel thread context (may sleep). 4416 */ 4417 static void ata_scsi_remove_dev(struct ata_device *dev) 4418 { 4419 struct ata_port *ap = dev->link->ap; 4420 struct scsi_device *sdev; 4421 unsigned long flags; 4422 4423 /* Alas, we need to grab scan_mutex to ensure SCSI device 4424 * state doesn't change underneath us and thus 4425 * scsi_device_get() always succeeds. The mutex locking can 4426 * be removed if there is __scsi_device_get() interface which 4427 * increments reference counts regardless of device state. 4428 */ 4429 mutex_lock(&ap->scsi_host->scan_mutex); 4430 spin_lock_irqsave(ap->lock, flags); 4431 4432 /* clearing dev->sdev is protected by host lock */ 4433 sdev = dev->sdev; 4434 dev->sdev = NULL; 4435 4436 if (sdev) { 4437 /* If user initiated unplug races with us, sdev can go 4438 * away underneath us after the host lock and 4439 * scan_mutex are released. Hold onto it. 4440 */ 4441 if (scsi_device_get(sdev) == 0) { 4442 /* The following ensures the attached sdev is 4443 * offline on return from ata_scsi_offline_dev() 4444 * regardless it wins or loses the race 4445 * against this function. 4446 */ 4447 scsi_device_set_state(sdev, SDEV_OFFLINE); 4448 } else { 4449 WARN_ON(1); 4450 sdev = NULL; 4451 } 4452 } 4453 4454 spin_unlock_irqrestore(ap->lock, flags); 4455 mutex_unlock(&ap->scsi_host->scan_mutex); 4456 4457 if (sdev) { 4458 ata_dev_info(dev, "detaching (SCSI %s)\n", 4459 dev_name(&sdev->sdev_gendev)); 4460 4461 scsi_remove_device(sdev); 4462 scsi_device_put(sdev); 4463 } 4464 } 4465 4466 static void ata_scsi_handle_link_detach(struct ata_link *link) 4467 { 4468 struct ata_port *ap = link->ap; 4469 struct ata_device *dev; 4470 4471 ata_for_each_dev(dev, link, ALL) { 4472 unsigned long flags; 4473 4474 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4475 continue; 4476 4477 spin_lock_irqsave(ap->lock, flags); 4478 dev->flags &= ~ATA_DFLAG_DETACHED; 4479 spin_unlock_irqrestore(ap->lock, flags); 4480 4481 if (zpodd_dev_enabled(dev)) 4482 zpodd_exit(dev); 4483 4484 ata_scsi_remove_dev(dev); 4485 } 4486 } 4487 4488 /** 4489 * ata_scsi_media_change_notify - send media change event 4490 * @dev: Pointer to the disk device with media change event 4491 * 4492 * Tell the block layer to send a media change notification 4493 * event. 4494 * 4495 * LOCKING: 4496 * spin_lock_irqsave(host lock) 4497 */ 4498 void ata_scsi_media_change_notify(struct ata_device *dev) 4499 { 4500 if (dev->sdev) 4501 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4502 GFP_ATOMIC); 4503 } 4504 4505 /** 4506 * ata_scsi_hotplug - SCSI part of hotplug 4507 * @work: Pointer to ATA port to perform SCSI hotplug on 4508 * 4509 * Perform SCSI part of hotplug. It's executed from a separate 4510 * workqueue after EH completes. This is necessary because SCSI 4511 * hot plugging requires working EH and hot unplugging is 4512 * synchronized with hot plugging with a mutex. 4513 * 4514 * LOCKING: 4515 * Kernel thread context (may sleep). 4516 */ 4517 void ata_scsi_hotplug(struct work_struct *work) 4518 { 4519 struct ata_port *ap = 4520 container_of(work, struct ata_port, hotplug_task.work); 4521 int i; 4522 4523 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4524 DPRINTK("ENTER/EXIT - unloading\n"); 4525 return; 4526 } 4527 4528 DPRINTK("ENTER\n"); 4529 mutex_lock(&ap->scsi_scan_mutex); 4530 4531 /* Unplug detached devices. We cannot use link iterator here 4532 * because PMP links have to be scanned even if PMP is 4533 * currently not attached. Iterate manually. 4534 */ 4535 ata_scsi_handle_link_detach(&ap->link); 4536 if (ap->pmp_link) 4537 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4538 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4539 4540 /* scan for new ones */ 4541 ata_scsi_scan_host(ap, 0); 4542 4543 mutex_unlock(&ap->scsi_scan_mutex); 4544 DPRINTK("EXIT\n"); 4545 } 4546 4547 /** 4548 * ata_scsi_user_scan - indication for user-initiated bus scan 4549 * @shost: SCSI host to scan 4550 * @channel: Channel to scan 4551 * @id: ID to scan 4552 * @lun: LUN to scan 4553 * 4554 * This function is called when user explicitly requests bus 4555 * scan. Set probe pending flag and invoke EH. 4556 * 4557 * LOCKING: 4558 * SCSI layer (we don't care) 4559 * 4560 * RETURNS: 4561 * Zero. 4562 */ 4563 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4564 unsigned int id, u64 lun) 4565 { 4566 struct ata_port *ap = ata_shost_to_port(shost); 4567 unsigned long flags; 4568 int devno, rc = 0; 4569 4570 if (!ap->ops->error_handler) 4571 return -EOPNOTSUPP; 4572 4573 if (lun != SCAN_WILD_CARD && lun) 4574 return -EINVAL; 4575 4576 if (!sata_pmp_attached(ap)) { 4577 if (channel != SCAN_WILD_CARD && channel) 4578 return -EINVAL; 4579 devno = id; 4580 } else { 4581 if (id != SCAN_WILD_CARD && id) 4582 return -EINVAL; 4583 devno = channel; 4584 } 4585 4586 spin_lock_irqsave(ap->lock, flags); 4587 4588 if (devno == SCAN_WILD_CARD) { 4589 struct ata_link *link; 4590 4591 ata_for_each_link(link, ap, EDGE) { 4592 struct ata_eh_info *ehi = &link->eh_info; 4593 ehi->probe_mask |= ATA_ALL_DEVICES; 4594 ehi->action |= ATA_EH_RESET; 4595 } 4596 } else { 4597 struct ata_device *dev = ata_find_dev(ap, devno); 4598 4599 if (dev) { 4600 struct ata_eh_info *ehi = &dev->link->eh_info; 4601 ehi->probe_mask |= 1 << dev->devno; 4602 ehi->action |= ATA_EH_RESET; 4603 } else 4604 rc = -EINVAL; 4605 } 4606 4607 if (rc == 0) { 4608 ata_port_schedule_eh(ap); 4609 spin_unlock_irqrestore(ap->lock, flags); 4610 ata_port_wait_eh(ap); 4611 } else 4612 spin_unlock_irqrestore(ap->lock, flags); 4613 4614 return rc; 4615 } 4616 4617 /** 4618 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4619 * @work: Pointer to ATA port to perform scsi_rescan_device() 4620 * 4621 * After ATA pass thru (SAT) commands are executed successfully, 4622 * libata need to propagate the changes to SCSI layer. 4623 * 4624 * LOCKING: 4625 * Kernel thread context (may sleep). 4626 */ 4627 void ata_scsi_dev_rescan(struct work_struct *work) 4628 { 4629 struct ata_port *ap = 4630 container_of(work, struct ata_port, scsi_rescan_task); 4631 struct ata_link *link; 4632 struct ata_device *dev; 4633 unsigned long flags; 4634 4635 mutex_lock(&ap->scsi_scan_mutex); 4636 spin_lock_irqsave(ap->lock, flags); 4637 4638 ata_for_each_link(link, ap, EDGE) { 4639 ata_for_each_dev(dev, link, ENABLED) { 4640 struct scsi_device *sdev = dev->sdev; 4641 4642 if (!sdev) 4643 continue; 4644 if (scsi_device_get(sdev)) 4645 continue; 4646 4647 spin_unlock_irqrestore(ap->lock, flags); 4648 scsi_rescan_device(&(sdev->sdev_gendev)); 4649 scsi_device_put(sdev); 4650 spin_lock_irqsave(ap->lock, flags); 4651 } 4652 } 4653 4654 spin_unlock_irqrestore(ap->lock, flags); 4655 mutex_unlock(&ap->scsi_scan_mutex); 4656 } 4657