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 2048 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 #define CDL_T2A_SUB_MPAGE 0x07 59 #define CDL_T2B_SUB_MPAGE 0x08 60 #define CDL_T2_SUB_MPAGE_LEN 232 61 #define ATA_FEATURE_SUB_MPAGE 0xf2 62 #define ATA_FEATURE_SUB_MPAGE_LEN 16 63 64 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 65 RW_RECOVERY_MPAGE, 66 RW_RECOVERY_MPAGE_LEN - 2, 67 (1 << 7), /* AWRE */ 68 0, /* read retry count */ 69 0, 0, 0, 0, 70 0, /* write retry count */ 71 0, 0, 0 72 }; 73 74 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 75 CACHE_MPAGE, 76 CACHE_MPAGE_LEN - 2, 77 0, /* contains WCE, needs to be 0 for logic */ 78 0, 0, 0, 0, 0, 0, 0, 0, 0, 79 0, /* contains DRA, needs to be 0 for logic */ 80 0, 0, 0, 0, 0, 0, 0 81 }; 82 83 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 84 CONTROL_MPAGE, 85 CONTROL_MPAGE_LEN - 2, 86 2, /* DSENSE=0, GLTSD=1 */ 87 0, /* [QAM+QERR may be 1, see 05-359r1] */ 88 0, 0, 0, 0, 0xff, 0xff, 89 0, 30 /* extended self test time, see 05-359r1 */ 90 }; 91 92 static ssize_t ata_scsi_park_show(struct device *device, 93 struct device_attribute *attr, char *buf) 94 { 95 struct scsi_device *sdev = to_scsi_device(device); 96 struct ata_port *ap; 97 struct ata_link *link; 98 struct ata_device *dev; 99 unsigned long now; 100 unsigned int msecs; 101 int rc = 0; 102 103 ap = ata_shost_to_port(sdev->host); 104 105 spin_lock_irq(ap->lock); 106 dev = ata_scsi_find_dev(ap, sdev); 107 if (!dev) { 108 rc = -ENODEV; 109 goto unlock; 110 } 111 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 112 rc = -EOPNOTSUPP; 113 goto unlock; 114 } 115 116 link = dev->link; 117 now = jiffies; 118 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 119 link->eh_context.unloaded_mask & (1 << dev->devno) && 120 time_after(dev->unpark_deadline, now)) 121 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 122 else 123 msecs = 0; 124 125 unlock: 126 spin_unlock_irq(ap->lock); 127 128 return rc ? rc : sysfs_emit(buf, "%u\n", msecs); 129 } 130 131 static ssize_t ata_scsi_park_store(struct device *device, 132 struct device_attribute *attr, 133 const char *buf, size_t len) 134 { 135 struct scsi_device *sdev = to_scsi_device(device); 136 struct ata_port *ap; 137 struct ata_device *dev; 138 long int input; 139 unsigned long flags; 140 int rc; 141 142 rc = kstrtol(buf, 10, &input); 143 if (rc) 144 return rc; 145 if (input < -2) 146 return -EINVAL; 147 if (input > ATA_TMOUT_MAX_PARK) { 148 rc = -EOVERFLOW; 149 input = ATA_TMOUT_MAX_PARK; 150 } 151 152 ap = ata_shost_to_port(sdev->host); 153 154 spin_lock_irqsave(ap->lock, flags); 155 dev = ata_scsi_find_dev(ap, sdev); 156 if (unlikely(!dev)) { 157 rc = -ENODEV; 158 goto unlock; 159 } 160 if (dev->class != ATA_DEV_ATA && 161 dev->class != ATA_DEV_ZAC) { 162 rc = -EOPNOTSUPP; 163 goto unlock; 164 } 165 166 if (input >= 0) { 167 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 168 rc = -EOPNOTSUPP; 169 goto unlock; 170 } 171 172 dev->unpark_deadline = ata_deadline(jiffies, input); 173 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 174 ata_port_schedule_eh(ap); 175 complete(&ap->park_req_pending); 176 } else { 177 switch (input) { 178 case -1: 179 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 180 break; 181 case -2: 182 dev->flags |= ATA_DFLAG_NO_UNLOAD; 183 break; 184 } 185 } 186 unlock: 187 spin_unlock_irqrestore(ap->lock, flags); 188 189 return rc ? rc : len; 190 } 191 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 192 ata_scsi_park_show, ata_scsi_park_store); 193 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 194 195 bool ata_scsi_sense_is_valid(u8 sk, u8 asc, u8 ascq) 196 { 197 /* 198 * If sk == NO_SENSE, and asc + ascq == NO ADDITIONAL SENSE INFORMATION, 199 * then there is no sense data to add. 200 */ 201 if (sk == 0 && asc == 0 && ascq == 0) 202 return false; 203 204 /* If sk > COMPLETED, sense data is bogus. */ 205 if (sk > COMPLETED) 206 return false; 207 208 return true; 209 } 210 211 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 212 u8 sk, u8 asc, u8 ascq) 213 { 214 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 215 216 scsi_build_sense(cmd, d_sense, sk, asc, ascq); 217 } 218 219 void ata_scsi_set_sense_information(struct ata_device *dev, 220 struct scsi_cmnd *cmd, 221 const struct ata_taskfile *tf) 222 { 223 u64 information; 224 225 information = ata_tf_read_block(tf, dev); 226 if (information == U64_MAX) 227 return; 228 229 scsi_set_sense_information(cmd->sense_buffer, 230 SCSI_SENSE_BUFFERSIZE, information); 231 } 232 233 static void ata_scsi_set_invalid_field(struct ata_device *dev, 234 struct scsi_cmnd *cmd, u16 field, u8 bit) 235 { 236 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 237 /* "Invalid field in CDB" */ 238 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 239 field, bit, 1); 240 } 241 242 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 243 struct scsi_cmnd *cmd, u16 field) 244 { 245 /* "Invalid field in parameter list" */ 246 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 247 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 248 field, 0xff, 0); 249 } 250 251 static struct attribute *ata_common_sdev_attrs[] = { 252 &dev_attr_unload_heads.attr, 253 NULL 254 }; 255 256 static const struct attribute_group ata_common_sdev_attr_group = { 257 .attrs = ata_common_sdev_attrs 258 }; 259 260 const struct attribute_group *ata_common_sdev_groups[] = { 261 &ata_common_sdev_attr_group, 262 NULL 263 }; 264 EXPORT_SYMBOL_GPL(ata_common_sdev_groups); 265 266 /** 267 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 268 * @sdev: SCSI device for which BIOS geometry is to be determined 269 * @bdev: block device associated with @sdev 270 * @capacity: capacity of SCSI device 271 * @geom: location to which geometry will be output 272 * 273 * Generic bios head/sector/cylinder calculator 274 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 275 * mapping. Some situations may arise where the disk is not 276 * bootable if this is not used. 277 * 278 * LOCKING: 279 * Defined by the SCSI layer. We don't really care. 280 * 281 * RETURNS: 282 * Zero. 283 */ 284 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 285 sector_t capacity, int geom[]) 286 { 287 geom[0] = 255; 288 geom[1] = 63; 289 sector_div(capacity, 255*63); 290 geom[2] = capacity; 291 292 return 0; 293 } 294 EXPORT_SYMBOL_GPL(ata_std_bios_param); 295 296 /** 297 * ata_scsi_unlock_native_capacity - unlock native capacity 298 * @sdev: SCSI device to adjust device capacity for 299 * 300 * This function is called if a partition on @sdev extends beyond 301 * the end of the device. It requests EH to unlock HPA. 302 * 303 * LOCKING: 304 * Defined by the SCSI layer. Might sleep. 305 */ 306 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 307 { 308 struct ata_port *ap = ata_shost_to_port(sdev->host); 309 struct ata_device *dev; 310 unsigned long flags; 311 312 spin_lock_irqsave(ap->lock, flags); 313 314 dev = ata_scsi_find_dev(ap, sdev); 315 if (dev && dev->n_sectors < dev->n_native_sectors) { 316 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 317 dev->link->eh_info.action |= ATA_EH_RESET; 318 ata_port_schedule_eh(ap); 319 } 320 321 spin_unlock_irqrestore(ap->lock, flags); 322 ata_port_wait_eh(ap); 323 } 324 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 325 326 /** 327 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 328 * @ap: target port 329 * @sdev: SCSI device to get identify data for 330 * @arg: User buffer area for identify data 331 * 332 * LOCKING: 333 * Defined by the SCSI layer. We don't really care. 334 * 335 * RETURNS: 336 * Zero on success, negative errno on error. 337 */ 338 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 339 void __user *arg) 340 { 341 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 342 u16 __user *dst = arg; 343 char buf[40]; 344 345 if (!dev) 346 return -ENOMSG; 347 348 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 349 return -EFAULT; 350 351 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 352 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 353 return -EFAULT; 354 355 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 356 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 357 return -EFAULT; 358 359 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 360 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 361 return -EFAULT; 362 363 return 0; 364 } 365 366 /** 367 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 368 * @scsidev: Device to which we are issuing command 369 * @arg: User provided data for issuing command 370 * 371 * LOCKING: 372 * Defined by the SCSI layer. We don't really care. 373 * 374 * RETURNS: 375 * Zero on success, negative errno on error. 376 */ 377 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 378 { 379 int rc = 0; 380 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 381 u8 scsi_cmd[MAX_COMMAND_SIZE]; 382 u8 args[4], *argbuf = NULL; 383 int argsize = 0; 384 struct scsi_sense_hdr sshdr; 385 const struct scsi_exec_args exec_args = { 386 .sshdr = &sshdr, 387 .sense = sensebuf, 388 .sense_len = sizeof(sensebuf), 389 }; 390 int cmd_result; 391 392 if (arg == NULL) 393 return -EINVAL; 394 395 if (copy_from_user(args, arg, sizeof(args))) 396 return -EFAULT; 397 398 memset(sensebuf, 0, sizeof(sensebuf)); 399 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 400 401 if (args[3]) { 402 argsize = ATA_SECT_SIZE * args[3]; 403 argbuf = kmalloc(argsize, GFP_KERNEL); 404 if (argbuf == NULL) { 405 rc = -ENOMEM; 406 goto error; 407 } 408 409 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 410 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 411 block count in sector count field */ 412 } else { 413 scsi_cmd[1] = (3 << 1); /* Non-data */ 414 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 415 } 416 417 scsi_cmd[0] = ATA_16; 418 419 scsi_cmd[4] = args[2]; 420 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 421 scsi_cmd[6] = args[3]; 422 scsi_cmd[8] = args[1]; 423 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 424 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 425 } else { 426 scsi_cmd[6] = args[1]; 427 } 428 scsi_cmd[14] = args[0]; 429 430 /* Good values for timeout and retries? Values below 431 from scsi_ioctl_send_command() for default case... */ 432 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, argbuf, 433 argsize, 10 * HZ, 5, &exec_args); 434 if (cmd_result < 0) { 435 rc = cmd_result; 436 goto error; 437 } 438 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 439 u8 *desc = sensebuf + 8; 440 441 /* If we set cc then ATA pass-through will cause a 442 * check condition even if no error. Filter that. */ 443 if (scsi_status_is_check_condition(cmd_result)) { 444 if (sshdr.sense_key == RECOVERED_ERROR && 445 sshdr.asc == 0 && sshdr.ascq == 0x1d) 446 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 447 } 448 449 /* Send userspace a few ATA registers (same as drivers/ide) */ 450 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 451 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 452 args[0] = desc[13]; /* status */ 453 args[1] = desc[3]; /* error */ 454 args[2] = desc[5]; /* sector count (0:7) */ 455 if (copy_to_user(arg, args, sizeof(args))) 456 rc = -EFAULT; 457 } 458 } 459 460 461 if (cmd_result) { 462 rc = -EIO; 463 goto error; 464 } 465 466 if ((argbuf) 467 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 468 rc = -EFAULT; 469 error: 470 kfree(argbuf); 471 return rc; 472 } 473 474 /** 475 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 476 * @scsidev: Device to which we are issuing command 477 * @arg: User provided data for issuing command 478 * 479 * LOCKING: 480 * Defined by the SCSI layer. We don't really care. 481 * 482 * RETURNS: 483 * Zero on success, negative errno on error. 484 */ 485 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 486 { 487 int rc = 0; 488 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 489 u8 scsi_cmd[MAX_COMMAND_SIZE]; 490 u8 args[7]; 491 struct scsi_sense_hdr sshdr; 492 int cmd_result; 493 const struct scsi_exec_args exec_args = { 494 .sshdr = &sshdr, 495 .sense = sensebuf, 496 .sense_len = sizeof(sensebuf), 497 }; 498 499 if (arg == NULL) 500 return -EINVAL; 501 502 if (copy_from_user(args, arg, sizeof(args))) 503 return -EFAULT; 504 505 memset(sensebuf, 0, sizeof(sensebuf)); 506 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 507 scsi_cmd[0] = ATA_16; 508 scsi_cmd[1] = (3 << 1); /* Non-data */ 509 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 510 scsi_cmd[4] = args[1]; 511 scsi_cmd[6] = args[2]; 512 scsi_cmd[8] = args[3]; 513 scsi_cmd[10] = args[4]; 514 scsi_cmd[12] = args[5]; 515 scsi_cmd[13] = args[6] & 0x4f; 516 scsi_cmd[14] = args[0]; 517 518 /* Good values for timeout and retries? Values below 519 from scsi_ioctl_send_command() for default case... */ 520 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, NULL, 521 0, 10 * HZ, 5, &exec_args); 522 if (cmd_result < 0) { 523 rc = cmd_result; 524 goto error; 525 } 526 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 527 u8 *desc = sensebuf + 8; 528 529 /* If we set cc then ATA pass-through will cause a 530 * check condition even if no error. Filter that. */ 531 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 532 if (sshdr.sense_key == RECOVERED_ERROR && 533 sshdr.asc == 0 && sshdr.ascq == 0x1d) 534 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 535 } 536 537 /* Send userspace ATA registers */ 538 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 539 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 540 args[0] = desc[13]; /* status */ 541 args[1] = desc[3]; /* error */ 542 args[2] = desc[5]; /* sector count (0:7) */ 543 args[3] = desc[7]; /* lbal */ 544 args[4] = desc[9]; /* lbam */ 545 args[5] = desc[11]; /* lbah */ 546 args[6] = desc[12]; /* select */ 547 if (copy_to_user(arg, args, sizeof(args))) 548 rc = -EFAULT; 549 } 550 } 551 552 if (cmd_result) { 553 rc = -EIO; 554 goto error; 555 } 556 557 error: 558 return rc; 559 } 560 561 static bool ata_ioc32(struct ata_port *ap) 562 { 563 if (ap->flags & ATA_FLAG_PIO_DMA) 564 return true; 565 if (ap->pflags & ATA_PFLAG_PIO32) 566 return true; 567 return false; 568 } 569 570 /* 571 * This handles both native and compat commands, so anything added 572 * here must have a compatible argument, or check in_compat_syscall() 573 */ 574 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 575 unsigned int cmd, void __user *arg) 576 { 577 unsigned long val; 578 int rc = -EINVAL; 579 unsigned long flags; 580 581 switch (cmd) { 582 case HDIO_GET_32BIT: 583 spin_lock_irqsave(ap->lock, flags); 584 val = ata_ioc32(ap); 585 spin_unlock_irqrestore(ap->lock, flags); 586 #ifdef CONFIG_COMPAT 587 if (in_compat_syscall()) 588 return put_user(val, (compat_ulong_t __user *)arg); 589 #endif 590 return put_user(val, (unsigned long __user *)arg); 591 592 case HDIO_SET_32BIT: 593 val = (unsigned long) arg; 594 rc = 0; 595 spin_lock_irqsave(ap->lock, flags); 596 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 597 if (val) 598 ap->pflags |= ATA_PFLAG_PIO32; 599 else 600 ap->pflags &= ~ATA_PFLAG_PIO32; 601 } else { 602 if (val != ata_ioc32(ap)) 603 rc = -EINVAL; 604 } 605 spin_unlock_irqrestore(ap->lock, flags); 606 return rc; 607 608 case HDIO_GET_IDENTITY: 609 return ata_get_identity(ap, scsidev, arg); 610 611 case HDIO_DRIVE_CMD: 612 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 613 return -EACCES; 614 return ata_cmd_ioctl(scsidev, arg); 615 616 case HDIO_DRIVE_TASK: 617 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 618 return -EACCES; 619 return ata_task_ioctl(scsidev, arg); 620 621 default: 622 rc = -ENOTTY; 623 break; 624 } 625 626 return rc; 627 } 628 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 629 630 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 631 void __user *arg) 632 { 633 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 634 scsidev, cmd, arg); 635 } 636 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 637 638 /** 639 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 640 * @dev: ATA device to which the new command is attached 641 * @cmd: SCSI command that originated this ATA command 642 * 643 * Obtain a reference to an unused ata_queued_cmd structure, 644 * which is the basic libata structure representing a single 645 * ATA command sent to the hardware. 646 * 647 * If a command was available, fill in the SCSI-specific 648 * portions of the structure with information on the 649 * current command. 650 * 651 * LOCKING: 652 * spin_lock_irqsave(host lock) 653 * 654 * RETURNS: 655 * Command allocated, or %NULL if none available. 656 */ 657 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 658 struct scsi_cmnd *cmd) 659 { 660 struct ata_port *ap = dev->link->ap; 661 struct ata_queued_cmd *qc; 662 int tag; 663 664 if (unlikely(ata_port_is_frozen(ap))) 665 goto fail; 666 667 if (ap->flags & ATA_FLAG_SAS_HOST) { 668 /* 669 * SAS hosts may queue > ATA_MAX_QUEUE commands so use 670 * unique per-device budget token as a tag. 671 */ 672 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE)) 673 goto fail; 674 tag = cmd->budget_token; 675 } else { 676 tag = scsi_cmd_to_rq(cmd)->tag; 677 } 678 679 qc = __ata_qc_from_tag(ap, tag); 680 qc->tag = qc->hw_tag = tag; 681 qc->ap = ap; 682 qc->dev = dev; 683 684 ata_qc_reinit(qc); 685 686 qc->scsicmd = cmd; 687 qc->scsidone = scsi_done; 688 689 qc->sg = scsi_sglist(cmd); 690 qc->n_elem = scsi_sg_count(cmd); 691 692 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 693 qc->flags |= ATA_QCFLAG_QUIET; 694 695 return qc; 696 697 fail: 698 set_host_byte(cmd, DID_OK); 699 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL); 700 scsi_done(cmd); 701 return NULL; 702 } 703 704 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 705 { 706 struct scsi_cmnd *scmd = qc->scsicmd; 707 708 qc->extrabytes = scmd->extra_len; 709 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 710 } 711 712 /** 713 * ata_dump_status - user friendly display of error info 714 * @ap: the port in question 715 * @tf: ptr to filled out taskfile 716 * 717 * Decode and dump the ATA error/status registers for the user so 718 * that they have some idea what really happened at the non 719 * make-believe layer. 720 * 721 * LOCKING: 722 * inherited from caller 723 */ 724 static void ata_dump_status(struct ata_port *ap, struct ata_taskfile *tf) 725 { 726 u8 stat = tf->status, err = tf->error; 727 728 if (stat & ATA_BUSY) { 729 ata_port_warn(ap, "status=0x%02x {Busy} ", stat); 730 } else { 731 ata_port_warn(ap, "status=0x%02x { %s%s%s%s%s%s%s} ", stat, 732 stat & ATA_DRDY ? "DriveReady " : "", 733 stat & ATA_DF ? "DeviceFault " : "", 734 stat & ATA_DSC ? "SeekComplete " : "", 735 stat & ATA_DRQ ? "DataRequest " : "", 736 stat & ATA_CORR ? "CorrectedError " : "", 737 stat & ATA_SENSE ? "Sense " : "", 738 stat & ATA_ERR ? "Error " : ""); 739 if (err) 740 ata_port_warn(ap, "error=0x%02x {%s%s%s%s%s%s", err, 741 err & ATA_ABORTED ? 742 "DriveStatusError " : "", 743 err & ATA_ICRC ? 744 (err & ATA_ABORTED ? 745 "BadCRC " : "Sector ") : "", 746 err & ATA_UNC ? "UncorrectableError " : "", 747 err & ATA_IDNF ? "SectorIdNotFound " : "", 748 err & ATA_TRK0NF ? "TrackZeroNotFound " : "", 749 err & ATA_AMNF ? "AddrMarkNotFound " : ""); 750 } 751 } 752 753 /** 754 * ata_to_sense_error - convert ATA error to SCSI error 755 * @id: ATA device number 756 * @drv_stat: value contained in ATA status register 757 * @drv_err: value contained in ATA error register 758 * @sk: the sense key we'll fill out 759 * @asc: the additional sense code we'll fill out 760 * @ascq: the additional sense code qualifier we'll fill out 761 * @verbose: be verbose 762 * 763 * Converts an ATA error into a SCSI error. Fill out pointers to 764 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 765 * format sense blocks. 766 * 767 * LOCKING: 768 * spin_lock_irqsave(host lock) 769 */ 770 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 771 u8 *asc, u8 *ascq, int verbose) 772 { 773 int i; 774 775 /* Based on the 3ware driver translation table */ 776 static const unsigned char sense_table[][4] = { 777 /* BBD|ECC|ID|MAR */ 778 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 779 // Device busy Aborted command 780 /* BBD|ECC|ID */ 781 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 782 // Device busy Aborted command 783 /* ECC|MC|MARK */ 784 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 785 // Device fault Hardware error 786 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 787 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 788 // Data CRC error SCSI parity error 789 /* MC|ID|ABRT|TRK0|MARK */ 790 {0x37, NOT_READY, 0x04, 0x00}, 791 // Unit offline Not ready 792 /* MCR|MARK */ 793 {0x09, NOT_READY, 0x04, 0x00}, 794 // Unrecovered disk error Not ready 795 /* Bad address mark */ 796 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 797 // Address mark not found for data field 798 /* TRK0 - Track 0 not found */ 799 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 800 // Hardware error 801 /* Abort: 0x04 is not translated here, see below */ 802 /* Media change request */ 803 {0x08, NOT_READY, 0x04, 0x00}, 804 // FIXME: faking offline 805 /* SRV/IDNF - ID not found */ 806 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 807 // Logical address out of range 808 /* MC - Media Changed */ 809 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 810 // Not ready to ready change, medium may have changed 811 /* ECC - Uncorrectable ECC error */ 812 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 813 // Unrecovered read error 814 /* BBD - block marked bad */ 815 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 816 // Block marked bad Medium error, unrecovered read error 817 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 818 }; 819 static const unsigned char stat_table[][4] = { 820 /* Must be first because BUSY means no other bits valid */ 821 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 822 // Busy, fake parity for now 823 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 824 // Device ready, unaligned write command 825 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 826 // Device fault, internal target failure 827 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 828 // Timed out in xfer, fake parity for now 829 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 830 // Recovered ECC error Medium error, recovered 831 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 832 }; 833 834 /* 835 * Is this an error we can process/parse 836 */ 837 if (drv_stat & ATA_BUSY) { 838 drv_err = 0; /* Ignore the err bits, they're invalid */ 839 } 840 841 if (drv_err) { 842 /* Look for drv_err */ 843 for (i = 0; sense_table[i][0] != 0xFF; i++) { 844 /* Look for best matches first */ 845 if ((sense_table[i][0] & drv_err) == 846 sense_table[i][0]) { 847 *sk = sense_table[i][1]; 848 *asc = sense_table[i][2]; 849 *ascq = sense_table[i][3]; 850 goto translate_done; 851 } 852 } 853 } 854 855 /* 856 * Fall back to interpreting status bits. Note that if the drv_err 857 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 858 * is not descriptive enough. 859 */ 860 for (i = 0; stat_table[i][0] != 0xFF; i++) { 861 if (stat_table[i][0] & drv_stat) { 862 *sk = stat_table[i][1]; 863 *asc = stat_table[i][2]; 864 *ascq = stat_table[i][3]; 865 goto translate_done; 866 } 867 } 868 869 /* 870 * We need a sensible error return here, which is tricky, and one 871 * that won't cause people to do things like return a disk wrongly. 872 */ 873 *sk = ABORTED_COMMAND; 874 *asc = 0x00; 875 *ascq = 0x00; 876 877 translate_done: 878 if (verbose) 879 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 880 id, drv_stat, drv_err, *sk, *asc, *ascq); 881 return; 882 } 883 884 /* 885 * ata_gen_passthru_sense - Generate check condition sense block. 886 * @qc: Command that completed. 887 * 888 * This function is specific to the ATA descriptor format sense 889 * block specified for the ATA pass through commands. Regardless 890 * of whether the command errored or not, return a sense 891 * block. Copy all controller registers into the sense 892 * block. If there was no error, we get the request from an ATA 893 * passthrough command, so we use the following sense data: 894 * sk = RECOVERED ERROR 895 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 896 * 897 * 898 * LOCKING: 899 * None. 900 */ 901 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 902 { 903 struct scsi_cmnd *cmd = qc->scsicmd; 904 struct ata_taskfile *tf = &qc->result_tf; 905 unsigned char *sb = cmd->sense_buffer; 906 unsigned char *desc = sb + 8; 907 int verbose = qc->ap->ops->error_handler == NULL; 908 u8 sense_key, asc, ascq; 909 910 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 911 912 /* 913 * Use ata_to_sense_error() to map status register bits 914 * onto sense key, asc & ascq. 915 */ 916 if (qc->err_mask || 917 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 918 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error, 919 &sense_key, &asc, &ascq, verbose); 920 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 921 } else { 922 /* 923 * ATA PASS-THROUGH INFORMATION AVAILABLE 924 * Always in descriptor format sense. 925 */ 926 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 927 } 928 929 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 930 u8 len; 931 932 /* descriptor format */ 933 len = sb[7]; 934 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 935 if (!desc) { 936 if (SCSI_SENSE_BUFFERSIZE < len + 14) 937 return; 938 sb[7] = len + 14; 939 desc = sb + 8 + len; 940 } 941 desc[0] = 9; 942 desc[1] = 12; 943 /* 944 * Copy registers into sense buffer. 945 */ 946 desc[2] = 0x00; 947 desc[3] = tf->error; 948 desc[5] = tf->nsect; 949 desc[7] = tf->lbal; 950 desc[9] = tf->lbam; 951 desc[11] = tf->lbah; 952 desc[12] = tf->device; 953 desc[13] = tf->status; 954 955 /* 956 * Fill in Extend bit, and the high order bytes 957 * if applicable. 958 */ 959 if (tf->flags & ATA_TFLAG_LBA48) { 960 desc[2] |= 0x01; 961 desc[4] = tf->hob_nsect; 962 desc[6] = tf->hob_lbal; 963 desc[8] = tf->hob_lbam; 964 desc[10] = tf->hob_lbah; 965 } 966 } else { 967 /* Fixed sense format */ 968 desc[0] = tf->error; 969 desc[1] = tf->status; 970 desc[2] = tf->device; 971 desc[3] = tf->nsect; 972 desc[7] = 0; 973 if (tf->flags & ATA_TFLAG_LBA48) { 974 desc[8] |= 0x80; 975 if (tf->hob_nsect) 976 desc[8] |= 0x40; 977 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 978 desc[8] |= 0x20; 979 } 980 desc[9] = tf->lbal; 981 desc[10] = tf->lbam; 982 desc[11] = tf->lbah; 983 } 984 } 985 986 /** 987 * ata_gen_ata_sense - generate a SCSI fixed sense block 988 * @qc: Command that we are erroring out 989 * 990 * Generate sense block for a failed ATA command @qc. Descriptor 991 * format is used to accommodate LBA48 block address. 992 * 993 * LOCKING: 994 * None. 995 */ 996 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 997 { 998 struct ata_device *dev = qc->dev; 999 struct scsi_cmnd *cmd = qc->scsicmd; 1000 struct ata_taskfile *tf = &qc->result_tf; 1001 unsigned char *sb = cmd->sense_buffer; 1002 int verbose = qc->ap->ops->error_handler == NULL; 1003 u64 block; 1004 u8 sense_key, asc, ascq; 1005 1006 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1007 1008 if (ata_dev_disabled(dev)) { 1009 /* Device disabled after error recovery */ 1010 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 1011 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 1012 return; 1013 } 1014 /* Use ata_to_sense_error() to map status register bits 1015 * onto sense key, asc & ascq. 1016 */ 1017 if (qc->err_mask || 1018 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1019 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error, 1020 &sense_key, &asc, &ascq, verbose); 1021 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1022 } else { 1023 /* Could not decode error */ 1024 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1025 tf->status, qc->err_mask); 1026 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1027 return; 1028 } 1029 1030 block = ata_tf_read_block(&qc->result_tf, dev); 1031 if (block == U64_MAX) 1032 return; 1033 1034 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1035 } 1036 1037 void ata_scsi_sdev_config(struct scsi_device *sdev) 1038 { 1039 sdev->use_10_for_rw = 1; 1040 sdev->use_10_for_ms = 1; 1041 sdev->no_write_same = 1; 1042 1043 /* Schedule policy is determined by ->qc_defer() callback and 1044 * it needs to see every deferred qc. Set dev_blocked to 1 to 1045 * prevent SCSI midlayer from automatically deferring 1046 * requests. 1047 */ 1048 sdev->max_device_blocked = 1; 1049 } 1050 1051 /** 1052 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1053 * @rq: request to be checked 1054 * 1055 * ATAPI commands which transfer variable length data to host 1056 * might overflow due to application error or hardware bug. This 1057 * function checks whether overflow should be drained and ignored 1058 * for @request. 1059 * 1060 * LOCKING: 1061 * None. 1062 * 1063 * RETURNS: 1064 * 1 if ; otherwise, 0. 1065 */ 1066 bool ata_scsi_dma_need_drain(struct request *rq) 1067 { 1068 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1069 1070 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1071 } 1072 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1073 1074 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1075 { 1076 struct request_queue *q = sdev->request_queue; 1077 int depth = 1; 1078 1079 if (!ata_id_has_unload(dev->id)) 1080 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1081 1082 /* configure max sectors */ 1083 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1084 blk_queue_max_hw_sectors(q, dev->max_sectors); 1085 1086 if (dev->class == ATA_DEV_ATAPI) { 1087 sdev->sector_size = ATA_SECT_SIZE; 1088 1089 /* set DMA padding */ 1090 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1091 1092 /* make room for appending the drain */ 1093 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1094 1095 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1096 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1097 if (!sdev->dma_drain_buf) { 1098 ata_dev_err(dev, "drain buffer allocation failed\n"); 1099 return -ENOMEM; 1100 } 1101 } else { 1102 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1103 sdev->manage_start_stop = 1; 1104 } 1105 1106 /* 1107 * ata_pio_sectors() expects buffer for each sector to not cross 1108 * page boundary. Enforce it by requiring buffers to be sector 1109 * aligned, which works iff sector_size is not larger than 1110 * PAGE_SIZE. ATAPI devices also need the alignment as 1111 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1112 */ 1113 if (sdev->sector_size > PAGE_SIZE) 1114 ata_dev_warn(dev, 1115 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1116 sdev->sector_size); 1117 1118 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1119 1120 if (dev->flags & ATA_DFLAG_AN) 1121 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1122 1123 if (dev->flags & ATA_DFLAG_NCQ) 1124 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1125 depth = min(ATA_MAX_QUEUE, depth); 1126 scsi_change_queue_depth(sdev, depth); 1127 1128 if (dev->flags & ATA_DFLAG_TRUSTED) 1129 sdev->security_supported = 1; 1130 1131 dev->sdev = sdev; 1132 return 0; 1133 } 1134 1135 /** 1136 * ata_scsi_slave_config - Set SCSI device attributes 1137 * @sdev: SCSI device to examine 1138 * 1139 * This is called before we actually start reading 1140 * and writing to the device, to configure certain 1141 * SCSI mid-layer behaviors. 1142 * 1143 * LOCKING: 1144 * Defined by SCSI layer. We don't really care. 1145 */ 1146 1147 int ata_scsi_slave_config(struct scsi_device *sdev) 1148 { 1149 struct ata_port *ap = ata_shost_to_port(sdev->host); 1150 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1151 int rc = 0; 1152 1153 ata_scsi_sdev_config(sdev); 1154 1155 if (dev) 1156 rc = ata_scsi_dev_config(sdev, dev); 1157 1158 return rc; 1159 } 1160 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1161 1162 /** 1163 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1164 * @sdev: SCSI device to be destroyed 1165 * 1166 * @sdev is about to be destroyed for hot/warm unplugging. If 1167 * this unplugging was initiated by libata as indicated by NULL 1168 * dev->sdev, this function doesn't have to do anything. 1169 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1170 * Clear dev->sdev, schedule the device for ATA detach and invoke 1171 * EH. 1172 * 1173 * LOCKING: 1174 * Defined by SCSI layer. We don't really care. 1175 */ 1176 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1177 { 1178 struct ata_port *ap = ata_shost_to_port(sdev->host); 1179 unsigned long flags; 1180 struct ata_device *dev; 1181 1182 if (!ap->ops->error_handler) 1183 return; 1184 1185 spin_lock_irqsave(ap->lock, flags); 1186 dev = __ata_scsi_find_dev(ap, sdev); 1187 if (dev && dev->sdev) { 1188 /* SCSI device already in CANCEL state, no need to offline it */ 1189 dev->sdev = NULL; 1190 dev->flags |= ATA_DFLAG_DETACH; 1191 ata_port_schedule_eh(ap); 1192 } 1193 spin_unlock_irqrestore(ap->lock, flags); 1194 1195 kfree(sdev->dma_drain_buf); 1196 } 1197 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1198 1199 /** 1200 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1201 * @qc: Storage for translated ATA taskfile 1202 * 1203 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1204 * (to start). Perhaps these commands should be preceded by 1205 * CHECK POWER MODE to see what power mode the device is already in. 1206 * [See SAT revision 5 at www.t10.org] 1207 * 1208 * LOCKING: 1209 * spin_lock_irqsave(host lock) 1210 * 1211 * RETURNS: 1212 * Zero on success, non-zero on error. 1213 */ 1214 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1215 { 1216 struct scsi_cmnd *scmd = qc->scsicmd; 1217 struct ata_taskfile *tf = &qc->tf; 1218 const u8 *cdb = scmd->cmnd; 1219 u16 fp; 1220 u8 bp = 0xff; 1221 1222 if (scmd->cmd_len < 5) { 1223 fp = 4; 1224 goto invalid_fld; 1225 } 1226 1227 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1228 tf->protocol = ATA_PROT_NODATA; 1229 if (cdb[1] & 0x1) { 1230 ; /* ignore IMMED bit, violates sat-r05 */ 1231 } 1232 if (cdb[4] & 0x2) { 1233 fp = 4; 1234 bp = 1; 1235 goto invalid_fld; /* LOEJ bit set not supported */ 1236 } 1237 if (((cdb[4] >> 4) & 0xf) != 0) { 1238 fp = 4; 1239 bp = 3; 1240 goto invalid_fld; /* power conditions not supported */ 1241 } 1242 1243 if (cdb[4] & 0x1) { 1244 tf->nsect = 1; /* 1 sector, lba=0 */ 1245 1246 if (qc->dev->flags & ATA_DFLAG_LBA) { 1247 tf->flags |= ATA_TFLAG_LBA; 1248 1249 tf->lbah = 0x0; 1250 tf->lbam = 0x0; 1251 tf->lbal = 0x0; 1252 tf->device |= ATA_LBA; 1253 } else { 1254 /* CHS */ 1255 tf->lbal = 0x1; /* sect */ 1256 tf->lbam = 0x0; /* cyl low */ 1257 tf->lbah = 0x0; /* cyl high */ 1258 } 1259 1260 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1261 } else { 1262 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1263 * or S5) causing some drives to spin up and down again. 1264 */ 1265 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1266 system_state == SYSTEM_POWER_OFF) 1267 goto skip; 1268 1269 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1270 system_entering_hibernation()) 1271 goto skip; 1272 1273 /* Issue ATA STANDBY IMMEDIATE command */ 1274 tf->command = ATA_CMD_STANDBYNOW1; 1275 } 1276 1277 /* 1278 * Standby and Idle condition timers could be implemented but that 1279 * would require libata to implement the Power condition mode page 1280 * and allow the user to change it. Changing mode pages requires 1281 * MODE SELECT to be implemented. 1282 */ 1283 1284 return 0; 1285 1286 invalid_fld: 1287 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1288 return 1; 1289 skip: 1290 scmd->result = SAM_STAT_GOOD; 1291 return 1; 1292 } 1293 1294 1295 /** 1296 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1297 * @qc: Storage for translated ATA taskfile 1298 * 1299 * Sets up an ATA taskfile to issue FLUSH CACHE or 1300 * FLUSH CACHE EXT. 1301 * 1302 * LOCKING: 1303 * spin_lock_irqsave(host lock) 1304 * 1305 * RETURNS: 1306 * Zero on success, non-zero on error. 1307 */ 1308 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1309 { 1310 struct ata_taskfile *tf = &qc->tf; 1311 1312 tf->flags |= ATA_TFLAG_DEVICE; 1313 tf->protocol = ATA_PROT_NODATA; 1314 1315 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1316 tf->command = ATA_CMD_FLUSH_EXT; 1317 else 1318 tf->command = ATA_CMD_FLUSH; 1319 1320 /* flush is critical for IO integrity, consider it an IO command */ 1321 qc->flags |= ATA_QCFLAG_IO; 1322 1323 return 0; 1324 } 1325 1326 /** 1327 * scsi_6_lba_len - Get LBA and transfer length 1328 * @cdb: SCSI command to translate 1329 * 1330 * Calculate LBA and transfer length for 6-byte commands. 1331 * 1332 * RETURNS: 1333 * @plba: the LBA 1334 * @plen: the transfer length 1335 */ 1336 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1337 { 1338 u64 lba = 0; 1339 u32 len; 1340 1341 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1342 lba |= ((u64)cdb[2]) << 8; 1343 lba |= ((u64)cdb[3]); 1344 1345 len = cdb[4]; 1346 1347 *plba = lba; 1348 *plen = len; 1349 } 1350 1351 /** 1352 * scsi_10_lba_len - Get LBA and transfer length 1353 * @cdb: SCSI command to translate 1354 * 1355 * Calculate LBA and transfer length for 10-byte commands. 1356 * 1357 * RETURNS: 1358 * @plba: the LBA 1359 * @plen: the transfer length 1360 */ 1361 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1362 { 1363 *plba = get_unaligned_be32(&cdb[2]); 1364 *plen = get_unaligned_be16(&cdb[7]); 1365 } 1366 1367 /** 1368 * scsi_16_lba_len - Get LBA and transfer length 1369 * @cdb: SCSI command to translate 1370 * 1371 * Calculate LBA and transfer length for 16-byte commands. 1372 * 1373 * RETURNS: 1374 * @plba: the LBA 1375 * @plen: the transfer length 1376 */ 1377 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1378 { 1379 *plba = get_unaligned_be64(&cdb[2]); 1380 *plen = get_unaligned_be32(&cdb[10]); 1381 } 1382 1383 /** 1384 * scsi_dld - Get duration limit descriptor index 1385 * @cdb: SCSI command to translate 1386 * 1387 * Returns the dld bits indicating the index of a command duration limit 1388 * descriptor. 1389 */ 1390 static inline int scsi_dld(const u8 *cdb) 1391 { 1392 return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03); 1393 } 1394 1395 /** 1396 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1397 * @qc: Storage for translated ATA taskfile 1398 * 1399 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1400 * 1401 * LOCKING: 1402 * spin_lock_irqsave(host lock) 1403 * 1404 * RETURNS: 1405 * Zero on success, non-zero on error. 1406 */ 1407 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1408 { 1409 struct scsi_cmnd *scmd = qc->scsicmd; 1410 struct ata_taskfile *tf = &qc->tf; 1411 struct ata_device *dev = qc->dev; 1412 u64 dev_sectors = qc->dev->n_sectors; 1413 const u8 *cdb = scmd->cmnd; 1414 u64 block; 1415 u32 n_block; 1416 u16 fp; 1417 1418 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1419 tf->protocol = ATA_PROT_NODATA; 1420 1421 switch (cdb[0]) { 1422 case VERIFY: 1423 if (scmd->cmd_len < 10) { 1424 fp = 9; 1425 goto invalid_fld; 1426 } 1427 scsi_10_lba_len(cdb, &block, &n_block); 1428 break; 1429 case VERIFY_16: 1430 if (scmd->cmd_len < 16) { 1431 fp = 15; 1432 goto invalid_fld; 1433 } 1434 scsi_16_lba_len(cdb, &block, &n_block); 1435 break; 1436 default: 1437 fp = 0; 1438 goto invalid_fld; 1439 } 1440 1441 if (!n_block) 1442 goto nothing_to_do; 1443 if (block >= dev_sectors) 1444 goto out_of_range; 1445 if ((block + n_block) > dev_sectors) 1446 goto out_of_range; 1447 1448 if (dev->flags & ATA_DFLAG_LBA) { 1449 tf->flags |= ATA_TFLAG_LBA; 1450 1451 if (lba_28_ok(block, n_block)) { 1452 /* use LBA28 */ 1453 tf->command = ATA_CMD_VERIFY; 1454 tf->device |= (block >> 24) & 0xf; 1455 } else if (lba_48_ok(block, n_block)) { 1456 if (!(dev->flags & ATA_DFLAG_LBA48)) 1457 goto out_of_range; 1458 1459 /* use LBA48 */ 1460 tf->flags |= ATA_TFLAG_LBA48; 1461 tf->command = ATA_CMD_VERIFY_EXT; 1462 1463 tf->hob_nsect = (n_block >> 8) & 0xff; 1464 1465 tf->hob_lbah = (block >> 40) & 0xff; 1466 tf->hob_lbam = (block >> 32) & 0xff; 1467 tf->hob_lbal = (block >> 24) & 0xff; 1468 } else 1469 /* request too large even for LBA48 */ 1470 goto out_of_range; 1471 1472 tf->nsect = n_block & 0xff; 1473 1474 tf->lbah = (block >> 16) & 0xff; 1475 tf->lbam = (block >> 8) & 0xff; 1476 tf->lbal = block & 0xff; 1477 1478 tf->device |= ATA_LBA; 1479 } else { 1480 /* CHS */ 1481 u32 sect, head, cyl, track; 1482 1483 if (!lba_28_ok(block, n_block)) 1484 goto out_of_range; 1485 1486 /* Convert LBA to CHS */ 1487 track = (u32)block / dev->sectors; 1488 cyl = track / dev->heads; 1489 head = track % dev->heads; 1490 sect = (u32)block % dev->sectors + 1; 1491 1492 /* Check whether the converted CHS can fit. 1493 Cylinder: 0-65535 1494 Head: 0-15 1495 Sector: 1-255*/ 1496 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1497 goto out_of_range; 1498 1499 tf->command = ATA_CMD_VERIFY; 1500 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1501 tf->lbal = sect; 1502 tf->lbam = cyl; 1503 tf->lbah = cyl >> 8; 1504 tf->device |= head; 1505 } 1506 1507 return 0; 1508 1509 invalid_fld: 1510 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1511 return 1; 1512 1513 out_of_range: 1514 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1515 /* "Logical Block Address out of range" */ 1516 return 1; 1517 1518 nothing_to_do: 1519 scmd->result = SAM_STAT_GOOD; 1520 return 1; 1521 } 1522 1523 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1524 { 1525 struct request *rq = scsi_cmd_to_rq(scmd); 1526 u32 req_blocks; 1527 1528 if (!blk_rq_is_passthrough(rq)) 1529 return true; 1530 1531 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1532 if (n_blocks > req_blocks) 1533 return false; 1534 1535 return true; 1536 } 1537 1538 /** 1539 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1540 * @qc: Storage for translated ATA taskfile 1541 * 1542 * Converts any of six SCSI read/write commands into the 1543 * ATA counterpart, including starting sector (LBA), 1544 * sector count, and taking into account the device's LBA48 1545 * support. 1546 * 1547 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1548 * %WRITE_16 are currently supported. 1549 * 1550 * LOCKING: 1551 * spin_lock_irqsave(host lock) 1552 * 1553 * RETURNS: 1554 * Zero on success, non-zero on error. 1555 */ 1556 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1557 { 1558 struct scsi_cmnd *scmd = qc->scsicmd; 1559 const u8 *cdb = scmd->cmnd; 1560 struct request *rq = scsi_cmd_to_rq(scmd); 1561 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1562 unsigned int tf_flags = 0; 1563 int dld = 0; 1564 u64 block; 1565 u32 n_block; 1566 int rc; 1567 u16 fp = 0; 1568 1569 switch (cdb[0]) { 1570 case WRITE_6: 1571 case WRITE_10: 1572 case WRITE_16: 1573 tf_flags |= ATA_TFLAG_WRITE; 1574 break; 1575 } 1576 1577 /* Calculate the SCSI LBA, transfer length and FUA. */ 1578 switch (cdb[0]) { 1579 case READ_10: 1580 case WRITE_10: 1581 if (unlikely(scmd->cmd_len < 10)) { 1582 fp = 9; 1583 goto invalid_fld; 1584 } 1585 scsi_10_lba_len(cdb, &block, &n_block); 1586 if (cdb[1] & (1 << 3)) 1587 tf_flags |= ATA_TFLAG_FUA; 1588 if (!ata_check_nblocks(scmd, n_block)) 1589 goto invalid_fld; 1590 break; 1591 case READ_6: 1592 case WRITE_6: 1593 if (unlikely(scmd->cmd_len < 6)) { 1594 fp = 5; 1595 goto invalid_fld; 1596 } 1597 scsi_6_lba_len(cdb, &block, &n_block); 1598 1599 /* for 6-byte r/w commands, transfer length 0 1600 * means 256 blocks of data, not 0 block. 1601 */ 1602 if (!n_block) 1603 n_block = 256; 1604 if (!ata_check_nblocks(scmd, n_block)) 1605 goto invalid_fld; 1606 break; 1607 case READ_16: 1608 case WRITE_16: 1609 if (unlikely(scmd->cmd_len < 16)) { 1610 fp = 15; 1611 goto invalid_fld; 1612 } 1613 scsi_16_lba_len(cdb, &block, &n_block); 1614 dld = scsi_dld(cdb); 1615 if (cdb[1] & (1 << 3)) 1616 tf_flags |= ATA_TFLAG_FUA; 1617 if (!ata_check_nblocks(scmd, n_block)) 1618 goto invalid_fld; 1619 break; 1620 default: 1621 fp = 0; 1622 goto invalid_fld; 1623 } 1624 1625 /* Check and compose ATA command */ 1626 if (!n_block) 1627 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1628 * length 0 means transfer 0 block of data. 1629 * However, for ATA R/W commands, sector count 0 means 1630 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1631 * 1632 * WARNING: one or two older ATA drives treat 0 as 0... 1633 */ 1634 goto nothing_to_do; 1635 1636 qc->flags |= ATA_QCFLAG_IO; 1637 qc->nbytes = n_block * scmd->device->sector_size; 1638 1639 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class); 1640 if (likely(rc == 0)) 1641 return 0; 1642 1643 if (rc == -ERANGE) 1644 goto out_of_range; 1645 /* treat all other errors as -EINVAL, fall through */ 1646 invalid_fld: 1647 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1648 return 1; 1649 1650 out_of_range: 1651 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1652 /* "Logical Block Address out of range" */ 1653 return 1; 1654 1655 nothing_to_do: 1656 scmd->result = SAM_STAT_GOOD; 1657 return 1; 1658 } 1659 1660 static void ata_qc_done(struct ata_queued_cmd *qc) 1661 { 1662 struct scsi_cmnd *cmd = qc->scsicmd; 1663 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1664 1665 ata_qc_free(qc); 1666 done(cmd); 1667 } 1668 1669 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1670 { 1671 struct ata_port *ap = qc->ap; 1672 struct scsi_cmnd *cmd = qc->scsicmd; 1673 u8 *cdb = cmd->cmnd; 1674 int need_sense = (qc->err_mask != 0) && 1675 !(qc->flags & ATA_QCFLAG_SENSE_VALID); 1676 1677 /* For ATA pass thru (SAT) commands, generate a sense block if 1678 * user mandated it or if there's an error. Note that if we 1679 * generate because the user forced us to [CK_COND =1], a check 1680 * condition is generated and the ATA register values are returned 1681 * whether the command completed successfully or not. If there 1682 * was no error, we use the following sense data: 1683 * sk = RECOVERED ERROR 1684 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1685 */ 1686 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1687 ((cdb[2] & 0x20) || need_sense)) 1688 ata_gen_passthru_sense(qc); 1689 else if (need_sense) 1690 ata_gen_ata_sense(qc); 1691 else 1692 /* Keep the SCSI ML and status byte, clear host byte. */ 1693 cmd->result &= 0x0000ffff; 1694 1695 if (need_sense && !ap->ops->error_handler) 1696 ata_dump_status(ap, &qc->result_tf); 1697 1698 ata_qc_done(qc); 1699 } 1700 1701 /** 1702 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1703 * @dev: ATA device to which the command is addressed 1704 * @cmd: SCSI command to execute 1705 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1706 * 1707 * Our ->queuecommand() function has decided that the SCSI 1708 * command issued can be directly translated into an ATA 1709 * command, rather than handled internally. 1710 * 1711 * This function sets up an ata_queued_cmd structure for the 1712 * SCSI command, and sends that ata_queued_cmd to the hardware. 1713 * 1714 * The xlat_func argument (actor) returns 0 if ready to execute 1715 * ATA command, else 1 to finish translation. If 1 is returned 1716 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1717 * to be set reflecting an error condition or clean (early) 1718 * termination. 1719 * 1720 * LOCKING: 1721 * spin_lock_irqsave(host lock) 1722 * 1723 * RETURNS: 1724 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1725 * needs to be deferred. 1726 */ 1727 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1728 ata_xlat_func_t xlat_func) 1729 { 1730 struct ata_port *ap = dev->link->ap; 1731 struct ata_queued_cmd *qc; 1732 int rc; 1733 1734 qc = ata_scsi_qc_new(dev, cmd); 1735 if (!qc) 1736 goto err_mem; 1737 1738 /* data is present; dma-map it */ 1739 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1740 cmd->sc_data_direction == DMA_TO_DEVICE) { 1741 if (unlikely(scsi_bufflen(cmd) < 1)) { 1742 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1743 goto err_did; 1744 } 1745 1746 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1747 1748 qc->dma_dir = cmd->sc_data_direction; 1749 } 1750 1751 qc->complete_fn = ata_scsi_qc_complete; 1752 1753 if (xlat_func(qc)) 1754 goto early_finish; 1755 1756 if (ap->ops->qc_defer) { 1757 if ((rc = ap->ops->qc_defer(qc))) 1758 goto defer; 1759 } 1760 1761 /* select device, send command to hardware */ 1762 ata_qc_issue(qc); 1763 1764 return 0; 1765 1766 early_finish: 1767 ata_qc_free(qc); 1768 scsi_done(cmd); 1769 return 0; 1770 1771 err_did: 1772 ata_qc_free(qc); 1773 cmd->result = (DID_ERROR << 16); 1774 scsi_done(cmd); 1775 err_mem: 1776 return 0; 1777 1778 defer: 1779 ata_qc_free(qc); 1780 if (rc == ATA_DEFER_LINK) 1781 return SCSI_MLQUEUE_DEVICE_BUSY; 1782 else 1783 return SCSI_MLQUEUE_HOST_BUSY; 1784 } 1785 1786 struct ata_scsi_args { 1787 struct ata_device *dev; 1788 u16 *id; 1789 struct scsi_cmnd *cmd; 1790 }; 1791 1792 /** 1793 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1794 * @args: device IDENTIFY data / SCSI command of interest. 1795 * @actor: Callback hook for desired SCSI command simulator 1796 * 1797 * Takes care of the hard work of simulating a SCSI command... 1798 * Mapping the response buffer, calling the command's handler, 1799 * and handling the handler's return value. This return value 1800 * indicates whether the handler wishes the SCSI command to be 1801 * completed successfully (0), or not (in which case cmd->result 1802 * and sense buffer are assumed to be set). 1803 * 1804 * LOCKING: 1805 * spin_lock_irqsave(host lock) 1806 */ 1807 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1808 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1809 { 1810 unsigned int rc; 1811 struct scsi_cmnd *cmd = args->cmd; 1812 unsigned long flags; 1813 1814 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1815 1816 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1817 rc = actor(args, ata_scsi_rbuf); 1818 if (rc == 0) 1819 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1820 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1821 1822 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1823 1824 if (rc == 0) 1825 cmd->result = SAM_STAT_GOOD; 1826 } 1827 1828 /** 1829 * ata_scsiop_inq_std - Simulate INQUIRY command 1830 * @args: device IDENTIFY data / SCSI command of interest. 1831 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1832 * 1833 * Returns standard device identification data associated 1834 * with non-VPD INQUIRY command output. 1835 * 1836 * LOCKING: 1837 * spin_lock_irqsave(host lock) 1838 */ 1839 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1840 { 1841 static const u8 versions[] = { 1842 0x00, 1843 0x60, /* SAM-3 (no version claimed) */ 1844 1845 0x03, 1846 0x20, /* SBC-2 (no version claimed) */ 1847 1848 0x03, 1849 0x00 /* SPC-3 (no version claimed) */ 1850 }; 1851 static const u8 versions_zbc[] = { 1852 0x00, 1853 0xA0, /* SAM-5 (no version claimed) */ 1854 1855 0x06, 1856 0x00, /* SBC-4 (no version claimed) */ 1857 1858 0x05, 1859 0xC0, /* SPC-5 (no version claimed) */ 1860 1861 0x60, 1862 0x24, /* ZBC r05 */ 1863 }; 1864 1865 u8 hdr[] = { 1866 TYPE_DISK, 1867 0, 1868 0x5, /* claim SPC-3 version compatibility */ 1869 2, 1870 95 - 4, 1871 0, 1872 0, 1873 2 1874 }; 1875 1876 /* set scsi removable (RMB) bit per ata bit, or if the 1877 * AHCI port says it's external (Hotplug-capable, eSATA). 1878 */ 1879 if (ata_id_removable(args->id) || 1880 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1881 hdr[1] |= (1 << 7); 1882 1883 if (args->dev->class == ATA_DEV_ZAC) { 1884 hdr[0] = TYPE_ZBC; 1885 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1886 } 1887 1888 memcpy(rbuf, hdr, sizeof(hdr)); 1889 memcpy(&rbuf[8], "ATA ", 8); 1890 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1891 1892 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1893 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1894 if (strncmp(&rbuf[32], " ", 4) == 0) 1895 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1896 1897 if (rbuf[32] == 0 || rbuf[32] == ' ') 1898 memcpy(&rbuf[32], "n/a ", 4); 1899 1900 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1901 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1902 else 1903 memcpy(rbuf + 58, versions, sizeof(versions)); 1904 1905 return 0; 1906 } 1907 1908 /** 1909 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1910 * @args: device IDENTIFY data / SCSI command of interest. 1911 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1912 * 1913 * Returns list of inquiry VPD pages available. 1914 * 1915 * LOCKING: 1916 * spin_lock_irqsave(host lock) 1917 */ 1918 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1919 { 1920 int i, num_pages = 0; 1921 static const u8 pages[] = { 1922 0x00, /* page 0x00, this page */ 1923 0x80, /* page 0x80, unit serial no page */ 1924 0x83, /* page 0x83, device ident page */ 1925 0x89, /* page 0x89, ata info page */ 1926 0xb0, /* page 0xb0, block limits page */ 1927 0xb1, /* page 0xb1, block device characteristics page */ 1928 0xb2, /* page 0xb2, thin provisioning page */ 1929 0xb6, /* page 0xb6, zoned block device characteristics */ 1930 0xb9, /* page 0xb9, concurrent positioning ranges */ 1931 }; 1932 1933 for (i = 0; i < sizeof(pages); i++) { 1934 if (pages[i] == 0xb6 && 1935 !(args->dev->flags & ATA_DFLAG_ZAC)) 1936 continue; 1937 rbuf[num_pages + 4] = pages[i]; 1938 num_pages++; 1939 } 1940 rbuf[3] = num_pages; /* number of supported VPD pages */ 1941 return 0; 1942 } 1943 1944 /** 1945 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1946 * @args: device IDENTIFY data / SCSI command of interest. 1947 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1948 * 1949 * Returns ATA device serial number. 1950 * 1951 * LOCKING: 1952 * spin_lock_irqsave(host lock) 1953 */ 1954 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1955 { 1956 static const u8 hdr[] = { 1957 0, 1958 0x80, /* this page code */ 1959 0, 1960 ATA_ID_SERNO_LEN, /* page len */ 1961 }; 1962 1963 memcpy(rbuf, hdr, sizeof(hdr)); 1964 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1965 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1966 return 0; 1967 } 1968 1969 /** 1970 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1971 * @args: device IDENTIFY data / SCSI command of interest. 1972 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1973 * 1974 * Yields two logical unit device identification designators: 1975 * - vendor specific ASCII containing the ATA serial number 1976 * - SAT defined "t10 vendor id based" containing ASCII vendor 1977 * name ("ATA "), model and serial numbers. 1978 * 1979 * LOCKING: 1980 * spin_lock_irqsave(host lock) 1981 */ 1982 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 1983 { 1984 const int sat_model_serial_desc_len = 68; 1985 int num; 1986 1987 rbuf[1] = 0x83; /* this page code */ 1988 num = 4; 1989 1990 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1991 rbuf[num + 0] = 2; 1992 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1993 num += 4; 1994 ata_id_string(args->id, (unsigned char *) rbuf + num, 1995 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1996 num += ATA_ID_SERNO_LEN; 1997 1998 /* SAT defined lu model and serial numbers descriptor */ 1999 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2000 rbuf[num + 0] = 2; 2001 rbuf[num + 1] = 1; 2002 rbuf[num + 3] = sat_model_serial_desc_len; 2003 num += 4; 2004 memcpy(rbuf + num, "ATA ", 8); 2005 num += 8; 2006 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2007 ATA_ID_PROD_LEN); 2008 num += ATA_ID_PROD_LEN; 2009 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2010 ATA_ID_SERNO_LEN); 2011 num += ATA_ID_SERNO_LEN; 2012 2013 if (ata_id_has_wwn(args->id)) { 2014 /* SAT defined lu world wide name */ 2015 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2016 rbuf[num + 0] = 1; 2017 rbuf[num + 1] = 3; 2018 rbuf[num + 3] = ATA_ID_WWN_LEN; 2019 num += 4; 2020 ata_id_string(args->id, (unsigned char *) rbuf + num, 2021 ATA_ID_WWN, ATA_ID_WWN_LEN); 2022 num += ATA_ID_WWN_LEN; 2023 } 2024 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2025 return 0; 2026 } 2027 2028 /** 2029 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2030 * @args: device IDENTIFY data / SCSI command of interest. 2031 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2032 * 2033 * Yields SAT-specified ATA VPD page. 2034 * 2035 * LOCKING: 2036 * spin_lock_irqsave(host lock) 2037 */ 2038 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2039 { 2040 rbuf[1] = 0x89; /* our page code */ 2041 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2042 rbuf[3] = (0x238 & 0xff); 2043 2044 memcpy(&rbuf[8], "linux ", 8); 2045 memcpy(&rbuf[16], "libata ", 16); 2046 memcpy(&rbuf[32], DRV_VERSION, 4); 2047 2048 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2049 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2050 /* TODO: PMP? */ 2051 2052 /* we don't store the ATA device signature, so we fake it */ 2053 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2054 rbuf[40] = 0x1; 2055 rbuf[48] = 0x1; 2056 2057 rbuf[56] = ATA_CMD_ID_ATA; 2058 2059 memcpy(&rbuf[60], &args->id[0], 512); 2060 return 0; 2061 } 2062 2063 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2064 { 2065 struct ata_device *dev = args->dev; 2066 u16 min_io_sectors; 2067 2068 rbuf[1] = 0xb0; 2069 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2070 2071 /* 2072 * Optimal transfer length granularity. 2073 * 2074 * This is always one physical block, but for disks with a smaller 2075 * logical than physical sector size we need to figure out what the 2076 * latter is. 2077 */ 2078 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2079 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2080 2081 /* 2082 * Optimal unmap granularity. 2083 * 2084 * The ATA spec doesn't even know about a granularity or alignment 2085 * for the TRIM command. We can leave away most of the unmap related 2086 * VPD page entries, but we have specifify a granularity to signal 2087 * that we support some form of unmap - in thise case via WRITE SAME 2088 * with the unmap bit set. 2089 */ 2090 if (ata_id_has_trim(args->id)) { 2091 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2092 2093 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2094 max_blocks = 128 << (20 - SECTOR_SHIFT); 2095 2096 put_unaligned_be64(max_blocks, &rbuf[36]); 2097 put_unaligned_be32(1, &rbuf[28]); 2098 } 2099 2100 return 0; 2101 } 2102 2103 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2104 { 2105 int form_factor = ata_id_form_factor(args->id); 2106 int media_rotation_rate = ata_id_rotation_rate(args->id); 2107 u8 zoned = ata_id_zoned_cap(args->id); 2108 2109 rbuf[1] = 0xb1; 2110 rbuf[3] = 0x3c; 2111 rbuf[4] = media_rotation_rate >> 8; 2112 rbuf[5] = media_rotation_rate; 2113 rbuf[7] = form_factor; 2114 if (zoned) 2115 rbuf[8] = (zoned << 4); 2116 2117 return 0; 2118 } 2119 2120 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2121 { 2122 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2123 rbuf[1] = 0xb2; 2124 rbuf[3] = 0x4; 2125 rbuf[5] = 1 << 6; /* TPWS */ 2126 2127 return 0; 2128 } 2129 2130 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2131 { 2132 /* 2133 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2134 */ 2135 rbuf[1] = 0xb6; 2136 rbuf[3] = 0x3C; 2137 2138 /* 2139 * URSWRZ bit is only meaningful for host-managed ZAC drives 2140 */ 2141 if (args->dev->zac_zoned_cap & 1) 2142 rbuf[4] |= 1; 2143 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2144 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2145 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2146 2147 return 0; 2148 } 2149 2150 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2151 { 2152 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2153 u8 *desc = &rbuf[64]; 2154 int i; 2155 2156 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2157 rbuf[1] = 0xb9; 2158 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2159 2160 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2161 desc[0] = cpr_log->cpr[i].num; 2162 desc[1] = cpr_log->cpr[i].num_storage_elements; 2163 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2164 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2165 } 2166 2167 return 0; 2168 } 2169 2170 /** 2171 * modecpy - Prepare response for MODE SENSE 2172 * @dest: output buffer 2173 * @src: data being copied 2174 * @n: length of mode page 2175 * @changeable: whether changeable parameters are requested 2176 * 2177 * Generate a generic MODE SENSE page for either current or changeable 2178 * parameters. 2179 * 2180 * LOCKING: 2181 * None. 2182 */ 2183 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2184 { 2185 if (changeable) { 2186 memcpy(dest, src, 2); 2187 memset(dest + 2, 0, n - 2); 2188 } else { 2189 memcpy(dest, src, n); 2190 } 2191 } 2192 2193 /** 2194 * ata_msense_caching - Simulate MODE SENSE caching info page 2195 * @id: device IDENTIFY data 2196 * @buf: output buffer 2197 * @changeable: whether changeable parameters are requested 2198 * 2199 * Generate a caching info page, which conditionally indicates 2200 * write caching to the SCSI layer, depending on device 2201 * capabilities. 2202 * 2203 * LOCKING: 2204 * None. 2205 */ 2206 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2207 { 2208 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2209 if (changeable) { 2210 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2211 } else { 2212 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2213 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2214 } 2215 return sizeof(def_cache_mpage); 2216 } 2217 2218 /* 2219 * Simulate MODE SENSE control mode page, sub-page 0. 2220 */ 2221 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2222 bool changeable) 2223 { 2224 modecpy(buf, def_control_mpage, 2225 sizeof(def_control_mpage), changeable); 2226 if (changeable) { 2227 /* ata_mselect_control() */ 2228 buf[2] |= (1 << 2); 2229 } else { 2230 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2231 2232 /* descriptor format sense data */ 2233 buf[2] |= (d_sense << 2); 2234 } 2235 2236 return sizeof(def_control_mpage); 2237 } 2238 2239 /* 2240 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2241 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2242 * only, take care of overflows. 2243 */ 2244 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2245 { 2246 u32 limit = get_unaligned_le32(buf); 2247 2248 return min_t(u32, limit / 10000, 65535); 2249 } 2250 2251 /* 2252 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2253 * (command duration limits T2A and T2B mode pages). 2254 */ 2255 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2256 u8 spg) 2257 { 2258 u8 *b, *cdl = dev->cdl, *desc; 2259 u32 policy; 2260 int i; 2261 2262 /* 2263 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2264 * are a header. The PAGE LENGTH field is the size of the page 2265 * excluding the header. 2266 */ 2267 buf[0] = CONTROL_MPAGE; 2268 buf[1] = spg; 2269 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2270 if (spg == CDL_T2A_SUB_MPAGE) { 2271 /* 2272 * Read descriptors map to the T2A page: 2273 * set perf_vs_duration_guidleine. 2274 */ 2275 buf[7] = (cdl[0] & 0x03) << 4; 2276 desc = cdl + 64; 2277 } else { 2278 /* Write descriptors map to the T2B page */ 2279 desc = cdl + 288; 2280 } 2281 2282 /* Fill the T2 page descriptors */ 2283 b = &buf[8]; 2284 policy = get_unaligned_le32(&cdl[0]); 2285 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2286 /* t2cdlunits: fixed to 10ms */ 2287 b[0] = 0x0a; 2288 2289 /* Max inactive time and its policy */ 2290 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2291 b[6] = ((policy >> 8) & 0x0f) << 4; 2292 2293 /* Max active time and its policy */ 2294 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2295 b[6] |= (policy >> 4) & 0x0f; 2296 2297 /* Command duration guideline and its policy */ 2298 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2299 b[14] = policy & 0x0f; 2300 } 2301 2302 return CDL_T2_SUB_MPAGE_LEN; 2303 } 2304 2305 /* 2306 * Simulate MODE SENSE control mode page, sub-page f2h 2307 * (ATA feature control mode page). 2308 */ 2309 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2310 u8 *buf) 2311 { 2312 /* PS=0, SPF=1 */ 2313 buf[0] = CONTROL_MPAGE | (1 << 6); 2314 buf[1] = ATA_FEATURE_SUB_MPAGE; 2315 2316 /* 2317 * The first four bytes of ATA Feature Control mode page are a header. 2318 * The PAGE LENGTH field is the size of the page excluding the header. 2319 */ 2320 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2321 2322 if (dev->flags & ATA_DFLAG_CDL) 2323 buf[4] = 0x02; /* Support T2A and T2B pages */ 2324 else 2325 buf[4] = 0; 2326 2327 return ATA_FEATURE_SUB_MPAGE_LEN; 2328 } 2329 2330 /** 2331 * ata_msense_control - Simulate MODE SENSE control mode page 2332 * @dev: ATA device of interest 2333 * @buf: output buffer 2334 * @spg: sub-page code 2335 * @changeable: whether changeable parameters are requested 2336 * 2337 * Generate a generic MODE SENSE control mode page. 2338 * 2339 * LOCKING: 2340 * None. 2341 */ 2342 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2343 u8 spg, bool changeable) 2344 { 2345 unsigned int n; 2346 2347 switch (spg) { 2348 case 0: 2349 return ata_msense_control_spg0(dev, buf, changeable); 2350 case CDL_T2A_SUB_MPAGE: 2351 case CDL_T2B_SUB_MPAGE: 2352 return ata_msense_control_spgt2(dev, buf, spg); 2353 case ATA_FEATURE_SUB_MPAGE: 2354 return ata_msense_control_ata_feature(dev, buf); 2355 case ALL_SUB_MPAGES: 2356 n = ata_msense_control_spg0(dev, buf, changeable); 2357 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2358 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2359 n += ata_msense_control_ata_feature(dev, buf + n); 2360 return n; 2361 default: 2362 return 0; 2363 } 2364 } 2365 2366 /** 2367 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2368 * @buf: output buffer 2369 * @changeable: whether changeable parameters are requested 2370 * 2371 * Generate a generic MODE SENSE r/w error recovery page. 2372 * 2373 * LOCKING: 2374 * None. 2375 */ 2376 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2377 { 2378 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2379 changeable); 2380 return sizeof(def_rw_recovery_mpage); 2381 } 2382 2383 /** 2384 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2385 * @args: device IDENTIFY data / SCSI command of interest. 2386 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2387 * 2388 * Simulate MODE SENSE commands. Assume this is invoked for direct 2389 * access devices (e.g. disks) only. There should be no block 2390 * descriptor for other device types. 2391 * 2392 * LOCKING: 2393 * spin_lock_irqsave(host lock) 2394 */ 2395 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2396 { 2397 struct ata_device *dev = args->dev; 2398 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2399 static const u8 sat_blk_desc[] = { 2400 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2401 0, 2402 0, 0x2, 0x0 /* block length: 512 bytes */ 2403 }; 2404 u8 pg, spg; 2405 unsigned int ebd, page_control, six_byte; 2406 u8 dpofua = 0, bp = 0xff; 2407 u16 fp; 2408 2409 six_byte = (scsicmd[0] == MODE_SENSE); 2410 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2411 /* 2412 * LLBA bit in msense(10) ignored (compliant) 2413 */ 2414 2415 page_control = scsicmd[2] >> 6; 2416 switch (page_control) { 2417 case 0: /* current */ 2418 case 1: /* changeable */ 2419 case 2: /* defaults */ 2420 break; /* supported */ 2421 case 3: /* saved */ 2422 goto saving_not_supp; 2423 default: 2424 fp = 2; 2425 bp = 6; 2426 goto invalid_fld; 2427 } 2428 2429 if (six_byte) 2430 p += 4 + (ebd ? 8 : 0); 2431 else 2432 p += 8 + (ebd ? 8 : 0); 2433 2434 pg = scsicmd[2] & 0x3f; 2435 spg = scsicmd[3]; 2436 2437 /* 2438 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2439 * the control page. 2440 */ 2441 if (spg) { 2442 switch (spg) { 2443 case ALL_SUB_MPAGES: 2444 break; 2445 case CDL_T2A_SUB_MPAGE: 2446 case CDL_T2B_SUB_MPAGE: 2447 case ATA_FEATURE_SUB_MPAGE: 2448 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2449 break; 2450 fallthrough; 2451 default: 2452 fp = 3; 2453 goto invalid_fld; 2454 } 2455 } 2456 2457 switch(pg) { 2458 case RW_RECOVERY_MPAGE: 2459 p += ata_msense_rw_recovery(p, page_control == 1); 2460 break; 2461 2462 case CACHE_MPAGE: 2463 p += ata_msense_caching(args->id, p, page_control == 1); 2464 break; 2465 2466 case CONTROL_MPAGE: 2467 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2468 break; 2469 2470 case ALL_MPAGES: 2471 p += ata_msense_rw_recovery(p, page_control == 1); 2472 p += ata_msense_caching(args->id, p, page_control == 1); 2473 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2474 break; 2475 2476 default: /* invalid page code */ 2477 fp = 2; 2478 goto invalid_fld; 2479 } 2480 2481 if (dev->flags & ATA_DFLAG_FUA) 2482 dpofua = 1 << 4; 2483 2484 if (six_byte) { 2485 rbuf[0] = p - rbuf - 1; 2486 rbuf[2] |= dpofua; 2487 if (ebd) { 2488 rbuf[3] = sizeof(sat_blk_desc); 2489 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2490 } 2491 } else { 2492 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2493 rbuf[3] |= dpofua; 2494 if (ebd) { 2495 rbuf[7] = sizeof(sat_blk_desc); 2496 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2497 } 2498 } 2499 return 0; 2500 2501 invalid_fld: 2502 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2503 return 1; 2504 2505 saving_not_supp: 2506 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2507 /* "Saving parameters not supported" */ 2508 return 1; 2509 } 2510 2511 /** 2512 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2513 * @args: device IDENTIFY data / SCSI command of interest. 2514 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2515 * 2516 * Simulate READ CAPACITY commands. 2517 * 2518 * LOCKING: 2519 * None. 2520 */ 2521 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2522 { 2523 struct ata_device *dev = args->dev; 2524 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2525 u32 sector_size; /* physical sector size in bytes */ 2526 u8 log2_per_phys; 2527 u16 lowest_aligned; 2528 2529 sector_size = ata_id_logical_sector_size(dev->id); 2530 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2531 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2532 2533 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2534 if (last_lba >= 0xffffffffULL) 2535 last_lba = 0xffffffff; 2536 2537 /* sector count, 32-bit */ 2538 rbuf[0] = last_lba >> (8 * 3); 2539 rbuf[1] = last_lba >> (8 * 2); 2540 rbuf[2] = last_lba >> (8 * 1); 2541 rbuf[3] = last_lba; 2542 2543 /* sector size */ 2544 rbuf[4] = sector_size >> (8 * 3); 2545 rbuf[5] = sector_size >> (8 * 2); 2546 rbuf[6] = sector_size >> (8 * 1); 2547 rbuf[7] = sector_size; 2548 } else { 2549 /* sector count, 64-bit */ 2550 rbuf[0] = last_lba >> (8 * 7); 2551 rbuf[1] = last_lba >> (8 * 6); 2552 rbuf[2] = last_lba >> (8 * 5); 2553 rbuf[3] = last_lba >> (8 * 4); 2554 rbuf[4] = last_lba >> (8 * 3); 2555 rbuf[5] = last_lba >> (8 * 2); 2556 rbuf[6] = last_lba >> (8 * 1); 2557 rbuf[7] = last_lba; 2558 2559 /* sector size */ 2560 rbuf[ 8] = sector_size >> (8 * 3); 2561 rbuf[ 9] = sector_size >> (8 * 2); 2562 rbuf[10] = sector_size >> (8 * 1); 2563 rbuf[11] = sector_size; 2564 2565 rbuf[12] = 0; 2566 rbuf[13] = log2_per_phys; 2567 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2568 rbuf[15] = lowest_aligned; 2569 2570 if (ata_id_has_trim(args->id) && 2571 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2572 rbuf[14] |= 0x80; /* LBPME */ 2573 2574 if (ata_id_has_zero_after_trim(args->id) && 2575 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2576 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2577 rbuf[14] |= 0x40; /* LBPRZ */ 2578 } 2579 } 2580 if (ata_id_zoned_cap(args->id) || 2581 args->dev->class == ATA_DEV_ZAC) 2582 rbuf[12] = (1 << 4); /* RC_BASIS */ 2583 } 2584 return 0; 2585 } 2586 2587 /** 2588 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2589 * @args: device IDENTIFY data / SCSI command of interest. 2590 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2591 * 2592 * Simulate REPORT LUNS command. 2593 * 2594 * LOCKING: 2595 * spin_lock_irqsave(host lock) 2596 */ 2597 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2598 { 2599 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2600 2601 return 0; 2602 } 2603 2604 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2605 { 2606 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2607 /* FIXME: not quite right; we don't want the 2608 * translation of taskfile registers into 2609 * a sense descriptors, since that's only 2610 * correct for ATA, not ATAPI 2611 */ 2612 ata_gen_passthru_sense(qc); 2613 } 2614 2615 ata_qc_done(qc); 2616 } 2617 2618 /* is it pointless to prefer PIO for "safety reasons"? */ 2619 static inline int ata_pio_use_silly(struct ata_port *ap) 2620 { 2621 return (ap->flags & ATA_FLAG_PIO_DMA); 2622 } 2623 2624 static void atapi_request_sense(struct ata_queued_cmd *qc) 2625 { 2626 struct ata_port *ap = qc->ap; 2627 struct scsi_cmnd *cmd = qc->scsicmd; 2628 2629 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2630 2631 #ifdef CONFIG_ATA_SFF 2632 if (ap->ops->sff_tf_read) 2633 ap->ops->sff_tf_read(ap, &qc->tf); 2634 #endif 2635 2636 /* fill these in, for the case where they are -not- overwritten */ 2637 cmd->sense_buffer[0] = 0x70; 2638 cmd->sense_buffer[2] = qc->tf.error >> 4; 2639 2640 ata_qc_reinit(qc); 2641 2642 /* setup sg table and init transfer direction */ 2643 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2644 ata_sg_init(qc, &qc->sgent, 1); 2645 qc->dma_dir = DMA_FROM_DEVICE; 2646 2647 memset(&qc->cdb, 0, qc->dev->cdb_len); 2648 qc->cdb[0] = REQUEST_SENSE; 2649 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2650 2651 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2652 qc->tf.command = ATA_CMD_PACKET; 2653 2654 if (ata_pio_use_silly(ap)) { 2655 qc->tf.protocol = ATAPI_PROT_DMA; 2656 qc->tf.feature |= ATAPI_PKT_DMA; 2657 } else { 2658 qc->tf.protocol = ATAPI_PROT_PIO; 2659 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2660 qc->tf.lbah = 0; 2661 } 2662 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2663 2664 qc->complete_fn = atapi_sense_complete; 2665 2666 ata_qc_issue(qc); 2667 } 2668 2669 /* 2670 * ATAPI devices typically report zero for their SCSI version, and sometimes 2671 * deviate from the spec WRT response data format. If SCSI version is 2672 * reported as zero like normal, then we make the following fixups: 2673 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2674 * modern device. 2675 * 2) Ensure response data format / ATAPI information are always correct. 2676 */ 2677 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2678 { 2679 u8 buf[4]; 2680 2681 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2682 if (buf[2] == 0) { 2683 buf[2] = 0x5; 2684 buf[3] = 0x32; 2685 } 2686 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2687 } 2688 2689 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2690 { 2691 struct scsi_cmnd *cmd = qc->scsicmd; 2692 unsigned int err_mask = qc->err_mask; 2693 2694 /* handle completion from new EH */ 2695 if (unlikely(qc->ap->ops->error_handler && 2696 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2697 2698 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2699 /* FIXME: not quite right; we don't want the 2700 * translation of taskfile registers into a 2701 * sense descriptors, since that's only 2702 * correct for ATA, not ATAPI 2703 */ 2704 ata_gen_passthru_sense(qc); 2705 } 2706 2707 /* SCSI EH automatically locks door if sdev->locked is 2708 * set. Sometimes door lock request continues to 2709 * fail, for example, when no media is present. This 2710 * creates a loop - SCSI EH issues door lock which 2711 * fails and gets invoked again to acquire sense data 2712 * for the failed command. 2713 * 2714 * If door lock fails, always clear sdev->locked to 2715 * avoid this infinite loop. 2716 * 2717 * This may happen before SCSI scan is complete. Make 2718 * sure qc->dev->sdev isn't NULL before dereferencing. 2719 */ 2720 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2721 qc->dev->sdev->locked = 0; 2722 2723 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2724 ata_qc_done(qc); 2725 return; 2726 } 2727 2728 /* successful completion or old EH failure path */ 2729 if (unlikely(err_mask & AC_ERR_DEV)) { 2730 cmd->result = SAM_STAT_CHECK_CONDITION; 2731 atapi_request_sense(qc); 2732 return; 2733 } else if (unlikely(err_mask)) { 2734 /* FIXME: not quite right; we don't want the 2735 * translation of taskfile registers into 2736 * a sense descriptors, since that's only 2737 * correct for ATA, not ATAPI 2738 */ 2739 ata_gen_passthru_sense(qc); 2740 } else { 2741 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2742 atapi_fixup_inquiry(cmd); 2743 cmd->result = SAM_STAT_GOOD; 2744 } 2745 2746 ata_qc_done(qc); 2747 } 2748 /** 2749 * atapi_xlat - Initialize PACKET taskfile 2750 * @qc: command structure to be initialized 2751 * 2752 * LOCKING: 2753 * spin_lock_irqsave(host lock) 2754 * 2755 * RETURNS: 2756 * Zero on success, non-zero on failure. 2757 */ 2758 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2759 { 2760 struct scsi_cmnd *scmd = qc->scsicmd; 2761 struct ata_device *dev = qc->dev; 2762 int nodata = (scmd->sc_data_direction == DMA_NONE); 2763 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2764 unsigned int nbytes; 2765 2766 memset(qc->cdb, 0, dev->cdb_len); 2767 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2768 2769 qc->complete_fn = atapi_qc_complete; 2770 2771 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2772 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2773 qc->tf.flags |= ATA_TFLAG_WRITE; 2774 } 2775 2776 qc->tf.command = ATA_CMD_PACKET; 2777 ata_qc_set_pc_nbytes(qc); 2778 2779 /* check whether ATAPI DMA is safe */ 2780 if (!nodata && !using_pio && atapi_check_dma(qc)) 2781 using_pio = 1; 2782 2783 /* Some controller variants snoop this value for Packet 2784 * transfers to do state machine and FIFO management. Thus we 2785 * want to set it properly, and for DMA where it is 2786 * effectively meaningless. 2787 */ 2788 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2789 2790 /* Most ATAPI devices which honor transfer chunk size don't 2791 * behave according to the spec when odd chunk size which 2792 * matches the transfer length is specified. If the number of 2793 * bytes to transfer is 2n+1. According to the spec, what 2794 * should happen is to indicate that 2n+1 is going to be 2795 * transferred and transfer 2n+2 bytes where the last byte is 2796 * padding. 2797 * 2798 * In practice, this doesn't happen. ATAPI devices first 2799 * indicate and transfer 2n bytes and then indicate and 2800 * transfer 2 bytes where the last byte is padding. 2801 * 2802 * This inconsistency confuses several controllers which 2803 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2804 * These controllers use actual number of transferred bytes to 2805 * update DMA pointer and transfer of 4n+2 bytes make those 2806 * controller push DMA pointer by 4n+4 bytes because SATA data 2807 * FISes are aligned to 4 bytes. This causes data corruption 2808 * and buffer overrun. 2809 * 2810 * Always setting nbytes to even number solves this problem 2811 * because then ATAPI devices don't have to split data at 2n 2812 * boundaries. 2813 */ 2814 if (nbytes & 0x1) 2815 nbytes++; 2816 2817 qc->tf.lbam = (nbytes & 0xFF); 2818 qc->tf.lbah = (nbytes >> 8); 2819 2820 if (nodata) 2821 qc->tf.protocol = ATAPI_PROT_NODATA; 2822 else if (using_pio) 2823 qc->tf.protocol = ATAPI_PROT_PIO; 2824 else { 2825 /* DMA data xfer */ 2826 qc->tf.protocol = ATAPI_PROT_DMA; 2827 qc->tf.feature |= ATAPI_PKT_DMA; 2828 2829 if ((dev->flags & ATA_DFLAG_DMADIR) && 2830 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2831 /* some SATA bridges need us to indicate data xfer direction */ 2832 qc->tf.feature |= ATAPI_DMADIR; 2833 } 2834 2835 2836 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2837 as ATAPI tape drives don't get this right otherwise */ 2838 return 0; 2839 } 2840 2841 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2842 { 2843 if (!sata_pmp_attached(ap)) { 2844 if (likely(devno >= 0 && 2845 devno < ata_link_max_devices(&ap->link))) 2846 return &ap->link.device[devno]; 2847 } else { 2848 if (likely(devno >= 0 && 2849 devno < ap->nr_pmp_links)) 2850 return &ap->pmp_link[devno].device[0]; 2851 } 2852 2853 return NULL; 2854 } 2855 2856 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2857 const struct scsi_device *scsidev) 2858 { 2859 int devno; 2860 2861 /* skip commands not addressed to targets we simulate */ 2862 if (!sata_pmp_attached(ap)) { 2863 if (unlikely(scsidev->channel || scsidev->lun)) 2864 return NULL; 2865 devno = scsidev->id; 2866 } else { 2867 if (unlikely(scsidev->id || scsidev->lun)) 2868 return NULL; 2869 devno = scsidev->channel; 2870 } 2871 2872 return ata_find_dev(ap, devno); 2873 } 2874 2875 /** 2876 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2877 * @ap: ATA port to which the device is attached 2878 * @scsidev: SCSI device from which we derive the ATA device 2879 * 2880 * Given various information provided in struct scsi_cmnd, 2881 * map that onto an ATA bus, and using that mapping 2882 * determine which ata_device is associated with the 2883 * SCSI command to be sent. 2884 * 2885 * LOCKING: 2886 * spin_lock_irqsave(host lock) 2887 * 2888 * RETURNS: 2889 * Associated ATA device, or %NULL if not found. 2890 */ 2891 struct ata_device * 2892 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2893 { 2894 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2895 2896 if (unlikely(!dev || !ata_dev_enabled(dev))) 2897 return NULL; 2898 2899 return dev; 2900 } 2901 2902 /* 2903 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2904 * @byte1: Byte 1 from pass-thru CDB. 2905 * 2906 * RETURNS: 2907 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2908 */ 2909 static u8 2910 ata_scsi_map_proto(u8 byte1) 2911 { 2912 switch((byte1 & 0x1e) >> 1) { 2913 case 3: /* Non-data */ 2914 return ATA_PROT_NODATA; 2915 2916 case 6: /* DMA */ 2917 case 10: /* UDMA Data-in */ 2918 case 11: /* UDMA Data-Out */ 2919 return ATA_PROT_DMA; 2920 2921 case 4: /* PIO Data-in */ 2922 case 5: /* PIO Data-out */ 2923 return ATA_PROT_PIO; 2924 2925 case 12: /* FPDMA */ 2926 return ATA_PROT_NCQ; 2927 2928 case 0: /* Hard Reset */ 2929 case 1: /* SRST */ 2930 case 8: /* Device Diagnostic */ 2931 case 9: /* Device Reset */ 2932 case 7: /* DMA Queued */ 2933 case 15: /* Return Response Info */ 2934 default: /* Reserved */ 2935 break; 2936 } 2937 2938 return ATA_PROT_UNKNOWN; 2939 } 2940 2941 /** 2942 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2943 * @qc: command structure to be initialized 2944 * 2945 * Handles either 12, 16, or 32-byte versions of the CDB. 2946 * 2947 * RETURNS: 2948 * Zero on success, non-zero on failure. 2949 */ 2950 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2951 { 2952 struct ata_taskfile *tf = &(qc->tf); 2953 struct scsi_cmnd *scmd = qc->scsicmd; 2954 struct ata_device *dev = qc->dev; 2955 const u8 *cdb = scmd->cmnd; 2956 u16 fp; 2957 u16 cdb_offset = 0; 2958 2959 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2960 if (cdb[0] == VARIABLE_LENGTH_CMD) 2961 cdb_offset = 9; 2962 2963 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2964 if (tf->protocol == ATA_PROT_UNKNOWN) { 2965 fp = 1; 2966 goto invalid_fld; 2967 } 2968 2969 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 2970 /* 2971 * When T_LENGTH is zero (No data is transferred), dir should 2972 * be DMA_NONE. 2973 */ 2974 if (scmd->sc_data_direction != DMA_NONE) { 2975 fp = 2 + cdb_offset; 2976 goto invalid_fld; 2977 } 2978 2979 if (ata_is_ncq(tf->protocol)) 2980 tf->protocol = ATA_PROT_NCQ_NODATA; 2981 } 2982 2983 /* enable LBA */ 2984 tf->flags |= ATA_TFLAG_LBA; 2985 2986 /* 2987 * 12 and 16 byte CDBs use different offsets to 2988 * provide the various register values. 2989 */ 2990 switch (cdb[0]) { 2991 case ATA_16: 2992 /* 2993 * 16-byte CDB - may contain extended commands. 2994 * 2995 * If that is the case, copy the upper byte register values. 2996 */ 2997 if (cdb[1] & 0x01) { 2998 tf->hob_feature = cdb[3]; 2999 tf->hob_nsect = cdb[5]; 3000 tf->hob_lbal = cdb[7]; 3001 tf->hob_lbam = cdb[9]; 3002 tf->hob_lbah = cdb[11]; 3003 tf->flags |= ATA_TFLAG_LBA48; 3004 } else 3005 tf->flags &= ~ATA_TFLAG_LBA48; 3006 3007 /* 3008 * Always copy low byte, device and command registers. 3009 */ 3010 tf->feature = cdb[4]; 3011 tf->nsect = cdb[6]; 3012 tf->lbal = cdb[8]; 3013 tf->lbam = cdb[10]; 3014 tf->lbah = cdb[12]; 3015 tf->device = cdb[13]; 3016 tf->command = cdb[14]; 3017 break; 3018 case ATA_12: 3019 /* 3020 * 12-byte CDB - incapable of extended commands. 3021 */ 3022 tf->flags &= ~ATA_TFLAG_LBA48; 3023 3024 tf->feature = cdb[3]; 3025 tf->nsect = cdb[4]; 3026 tf->lbal = cdb[5]; 3027 tf->lbam = cdb[6]; 3028 tf->lbah = cdb[7]; 3029 tf->device = cdb[8]; 3030 tf->command = cdb[9]; 3031 break; 3032 default: 3033 /* 3034 * 32-byte CDB - may contain extended command fields. 3035 * 3036 * If that is the case, copy the upper byte register values. 3037 */ 3038 if (cdb[10] & 0x01) { 3039 tf->hob_feature = cdb[20]; 3040 tf->hob_nsect = cdb[22]; 3041 tf->hob_lbal = cdb[16]; 3042 tf->hob_lbam = cdb[15]; 3043 tf->hob_lbah = cdb[14]; 3044 tf->flags |= ATA_TFLAG_LBA48; 3045 } else 3046 tf->flags &= ~ATA_TFLAG_LBA48; 3047 3048 tf->feature = cdb[21]; 3049 tf->nsect = cdb[23]; 3050 tf->lbal = cdb[19]; 3051 tf->lbam = cdb[18]; 3052 tf->lbah = cdb[17]; 3053 tf->device = cdb[24]; 3054 tf->command = cdb[25]; 3055 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3056 break; 3057 } 3058 3059 /* For NCQ commands copy the tag value */ 3060 if (ata_is_ncq(tf->protocol)) 3061 tf->nsect = qc->hw_tag << 3; 3062 3063 /* enforce correct master/slave bit */ 3064 tf->device = dev->devno ? 3065 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3066 3067 switch (tf->command) { 3068 /* READ/WRITE LONG use a non-standard sect_size */ 3069 case ATA_CMD_READ_LONG: 3070 case ATA_CMD_READ_LONG_ONCE: 3071 case ATA_CMD_WRITE_LONG: 3072 case ATA_CMD_WRITE_LONG_ONCE: 3073 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3074 fp = 1; 3075 goto invalid_fld; 3076 } 3077 qc->sect_size = scsi_bufflen(scmd); 3078 break; 3079 3080 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3081 case ATA_CMD_CFA_WRITE_NE: 3082 case ATA_CMD_CFA_TRANS_SECT: 3083 case ATA_CMD_CFA_WRITE_MULT_NE: 3084 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3085 case ATA_CMD_READ: 3086 case ATA_CMD_READ_EXT: 3087 case ATA_CMD_READ_QUEUED: 3088 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3089 case ATA_CMD_FPDMA_READ: 3090 case ATA_CMD_READ_MULTI: 3091 case ATA_CMD_READ_MULTI_EXT: 3092 case ATA_CMD_PIO_READ: 3093 case ATA_CMD_PIO_READ_EXT: 3094 case ATA_CMD_READ_STREAM_DMA_EXT: 3095 case ATA_CMD_READ_STREAM_EXT: 3096 case ATA_CMD_VERIFY: 3097 case ATA_CMD_VERIFY_EXT: 3098 case ATA_CMD_WRITE: 3099 case ATA_CMD_WRITE_EXT: 3100 case ATA_CMD_WRITE_FUA_EXT: 3101 case ATA_CMD_WRITE_QUEUED: 3102 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3103 case ATA_CMD_FPDMA_WRITE: 3104 case ATA_CMD_WRITE_MULTI: 3105 case ATA_CMD_WRITE_MULTI_EXT: 3106 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3107 case ATA_CMD_PIO_WRITE: 3108 case ATA_CMD_PIO_WRITE_EXT: 3109 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3110 case ATA_CMD_WRITE_STREAM_EXT: 3111 qc->sect_size = scmd->device->sector_size; 3112 break; 3113 3114 /* Everything else uses 512 byte "sectors" */ 3115 default: 3116 qc->sect_size = ATA_SECT_SIZE; 3117 } 3118 3119 /* 3120 * Set flags so that all registers will be written, pass on 3121 * write indication (used for PIO/DMA setup), result TF is 3122 * copied back and we don't whine too much about its failure. 3123 */ 3124 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3125 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3126 tf->flags |= ATA_TFLAG_WRITE; 3127 3128 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3129 3130 /* 3131 * Set transfer length. 3132 * 3133 * TODO: find out if we need to do more here to 3134 * cover scatter/gather case. 3135 */ 3136 ata_qc_set_pc_nbytes(qc); 3137 3138 /* We may not issue DMA commands if no DMA mode is set */ 3139 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3140 fp = 1; 3141 goto invalid_fld; 3142 } 3143 3144 /* We may not issue NCQ commands to devices not supporting NCQ */ 3145 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3146 fp = 1; 3147 goto invalid_fld; 3148 } 3149 3150 /* sanity check for pio multi commands */ 3151 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3152 fp = 1; 3153 goto invalid_fld; 3154 } 3155 3156 if (is_multi_taskfile(tf)) { 3157 unsigned int multi_count = 1 << (cdb[1] >> 5); 3158 3159 /* compare the passed through multi_count 3160 * with the cached multi_count of libata 3161 */ 3162 if (multi_count != dev->multi_count) 3163 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3164 multi_count); 3165 } 3166 3167 /* 3168 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3169 * SET_FEATURES - XFER MODE must be preceded/succeeded 3170 * by an update to hardware-specific registers for each 3171 * controller (i.e. the reason for ->set_piomode(), 3172 * ->set_dmamode(), and ->post_set_mode() hooks). 3173 */ 3174 if (tf->command == ATA_CMD_SET_FEATURES && 3175 tf->feature == SETFEATURES_XFER) { 3176 fp = (cdb[0] == ATA_16) ? 4 : 3; 3177 goto invalid_fld; 3178 } 3179 3180 /* 3181 * Filter TPM commands by default. These provide an 3182 * essentially uncontrolled encrypted "back door" between 3183 * applications and the disk. Set libata.allow_tpm=1 if you 3184 * have a real reason for wanting to use them. This ensures 3185 * that installed software cannot easily mess stuff up without 3186 * user intent. DVR type users will probably ship with this enabled 3187 * for movie content management. 3188 * 3189 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3190 * for this and should do in future but that it is not sufficient as 3191 * DCS is an optional feature set. Thus we also do the software filter 3192 * so that we comply with the TC consortium stated goal that the user 3193 * can turn off TC features of their system. 3194 */ 3195 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3196 fp = (cdb[0] == ATA_16) ? 14 : 9; 3197 goto invalid_fld; 3198 } 3199 3200 return 0; 3201 3202 invalid_fld: 3203 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3204 return 1; 3205 } 3206 3207 /** 3208 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3209 * @cmd: SCSI command being translated 3210 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3211 * @sector: Starting sector 3212 * @count: Total Range of request in logical sectors 3213 * 3214 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3215 * descriptor. 3216 * 3217 * Upto 64 entries of the format: 3218 * 63:48 Range Length 3219 * 47:0 LBA 3220 * 3221 * Range Length of 0 is ignored. 3222 * LBA's should be sorted order and not overlap. 3223 * 3224 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3225 * 3226 * Return: Number of bytes copied into sglist. 3227 */ 3228 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3229 u64 sector, u32 count) 3230 { 3231 struct scsi_device *sdp = cmd->device; 3232 size_t len = sdp->sector_size; 3233 size_t r; 3234 __le64 *buf; 3235 u32 i = 0; 3236 unsigned long flags; 3237 3238 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3239 3240 if (len > ATA_SCSI_RBUF_SIZE) 3241 len = ATA_SCSI_RBUF_SIZE; 3242 3243 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3244 buf = ((void *)ata_scsi_rbuf); 3245 memset(buf, 0, len); 3246 while (i < trmax) { 3247 u64 entry = sector | 3248 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3249 buf[i++] = __cpu_to_le64(entry); 3250 if (count <= 0xffff) 3251 break; 3252 count -= 0xffff; 3253 sector += 0xffff; 3254 } 3255 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3256 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3257 3258 return r; 3259 } 3260 3261 /** 3262 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3263 * @qc: Command to be translated 3264 * 3265 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3266 * an SCT Write Same command. 3267 * Based on WRITE SAME has the UNMAP flag: 3268 * 3269 * - When set translate to DSM TRIM 3270 * - When clear translate to SCT Write Same 3271 */ 3272 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3273 { 3274 struct ata_taskfile *tf = &qc->tf; 3275 struct scsi_cmnd *scmd = qc->scsicmd; 3276 struct scsi_device *sdp = scmd->device; 3277 size_t len = sdp->sector_size; 3278 struct ata_device *dev = qc->dev; 3279 const u8 *cdb = scmd->cmnd; 3280 u64 block; 3281 u32 n_block; 3282 const u32 trmax = len >> 3; 3283 u32 size; 3284 u16 fp; 3285 u8 bp = 0xff; 3286 u8 unmap = cdb[1] & 0x8; 3287 3288 /* we may not issue DMA commands if no DMA mode is set */ 3289 if (unlikely(!ata_dma_enabled(dev))) 3290 goto invalid_opcode; 3291 3292 /* 3293 * We only allow sending this command through the block layer, 3294 * as it modifies the DATA OUT buffer, which would corrupt user 3295 * memory for SG_IO commands. 3296 */ 3297 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3298 goto invalid_opcode; 3299 3300 if (unlikely(scmd->cmd_len < 16)) { 3301 fp = 15; 3302 goto invalid_fld; 3303 } 3304 scsi_16_lba_len(cdb, &block, &n_block); 3305 3306 if (!unmap || 3307 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3308 !ata_id_has_trim(dev->id)) { 3309 fp = 1; 3310 bp = 3; 3311 goto invalid_fld; 3312 } 3313 /* If the request is too large the cmd is invalid */ 3314 if (n_block > 0xffff * trmax) { 3315 fp = 2; 3316 goto invalid_fld; 3317 } 3318 3319 /* 3320 * WRITE SAME always has a sector sized buffer as payload, this 3321 * should never be a multiple entry S/G list. 3322 */ 3323 if (!scsi_sg_count(scmd)) 3324 goto invalid_param_len; 3325 3326 /* 3327 * size must match sector size in bytes 3328 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3329 * is defined as number of 512 byte blocks to be transferred. 3330 */ 3331 3332 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3333 if (size != len) 3334 goto invalid_param_len; 3335 3336 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3337 /* Newer devices support queued TRIM commands */ 3338 tf->protocol = ATA_PROT_NCQ; 3339 tf->command = ATA_CMD_FPDMA_SEND; 3340 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3341 tf->nsect = qc->hw_tag << 3; 3342 tf->hob_feature = (size / 512) >> 8; 3343 tf->feature = size / 512; 3344 3345 tf->auxiliary = 1; 3346 } else { 3347 tf->protocol = ATA_PROT_DMA; 3348 tf->hob_feature = 0; 3349 tf->feature = ATA_DSM_TRIM; 3350 tf->hob_nsect = (size / 512) >> 8; 3351 tf->nsect = size / 512; 3352 tf->command = ATA_CMD_DSM; 3353 } 3354 3355 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3356 ATA_TFLAG_WRITE; 3357 3358 ata_qc_set_pc_nbytes(qc); 3359 3360 return 0; 3361 3362 invalid_fld: 3363 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3364 return 1; 3365 invalid_param_len: 3366 /* "Parameter list length error" */ 3367 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3368 return 1; 3369 invalid_opcode: 3370 /* "Invalid command operation code" */ 3371 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3372 return 1; 3373 } 3374 3375 /** 3376 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3377 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3378 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3379 * 3380 * Yields a subset to satisfy scsi_report_opcode() 3381 * 3382 * LOCKING: 3383 * spin_lock_irqsave(host lock) 3384 */ 3385 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3386 { 3387 struct ata_device *dev = args->dev; 3388 u8 *cdb = args->cmd->cmnd; 3389 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3390 unsigned int err = 0; 3391 3392 if (cdb[2] != 1 && cdb[2] != 3) { 3393 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3394 err = 2; 3395 goto out; 3396 } 3397 3398 switch (cdb[3]) { 3399 case INQUIRY: 3400 case MODE_SENSE: 3401 case MODE_SENSE_10: 3402 case READ_CAPACITY: 3403 case SERVICE_ACTION_IN_16: 3404 case REPORT_LUNS: 3405 case REQUEST_SENSE: 3406 case SYNCHRONIZE_CACHE: 3407 case SYNCHRONIZE_CACHE_16: 3408 case REZERO_UNIT: 3409 case SEEK_6: 3410 case SEEK_10: 3411 case TEST_UNIT_READY: 3412 case SEND_DIAGNOSTIC: 3413 case MAINTENANCE_IN: 3414 case READ_6: 3415 case READ_10: 3416 case WRITE_6: 3417 case WRITE_10: 3418 case ATA_12: 3419 case ATA_16: 3420 case VERIFY: 3421 case VERIFY_16: 3422 case MODE_SELECT: 3423 case MODE_SELECT_10: 3424 case START_STOP: 3425 supported = 3; 3426 break; 3427 case READ_16: 3428 supported = 3; 3429 if (dev->flags & ATA_DFLAG_CDL) { 3430 /* 3431 * CDL read descriptors map to the T2A page, that is, 3432 * rwcdlp = 0x01 and cdlp = 0x01 3433 */ 3434 rwcdlp = 0x01; 3435 cdlp = 0x01 << 3; 3436 } 3437 break; 3438 case WRITE_16: 3439 supported = 3; 3440 if (dev->flags & ATA_DFLAG_CDL) { 3441 /* 3442 * CDL write descriptors map to the T2B page, that is, 3443 * rwcdlp = 0x01 and cdlp = 0x02 3444 */ 3445 rwcdlp = 0x01; 3446 cdlp = 0x02 << 3; 3447 } 3448 break; 3449 case ZBC_IN: 3450 case ZBC_OUT: 3451 if (ata_id_zoned_cap(dev->id) || 3452 dev->class == ATA_DEV_ZAC) 3453 supported = 3; 3454 break; 3455 case SECURITY_PROTOCOL_IN: 3456 case SECURITY_PROTOCOL_OUT: 3457 if (dev->flags & ATA_DFLAG_TRUSTED) 3458 supported = 3; 3459 break; 3460 default: 3461 break; 3462 } 3463 out: 3464 /* One command format */ 3465 rbuf[0] = rwcdlp; 3466 rbuf[1] = cdlp | supported; 3467 return err; 3468 } 3469 3470 /** 3471 * ata_scsi_report_zones_complete - convert ATA output 3472 * @qc: command structure returning the data 3473 * 3474 * Convert T-13 little-endian field representation into 3475 * T-10 big-endian field representation. 3476 * What a mess. 3477 */ 3478 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3479 { 3480 struct scsi_cmnd *scmd = qc->scsicmd; 3481 struct sg_mapping_iter miter; 3482 unsigned long flags; 3483 unsigned int bytes = 0; 3484 3485 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3486 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3487 3488 local_irq_save(flags); 3489 while (sg_miter_next(&miter)) { 3490 unsigned int offset = 0; 3491 3492 if (bytes == 0) { 3493 char *hdr; 3494 u32 list_length; 3495 u64 max_lba, opt_lba; 3496 u16 same; 3497 3498 /* Swizzle header */ 3499 hdr = miter.addr; 3500 list_length = get_unaligned_le32(&hdr[0]); 3501 same = get_unaligned_le16(&hdr[4]); 3502 max_lba = get_unaligned_le64(&hdr[8]); 3503 opt_lba = get_unaligned_le64(&hdr[16]); 3504 put_unaligned_be32(list_length, &hdr[0]); 3505 hdr[4] = same & 0xf; 3506 put_unaligned_be64(max_lba, &hdr[8]); 3507 put_unaligned_be64(opt_lba, &hdr[16]); 3508 offset += 64; 3509 bytes += 64; 3510 } 3511 while (offset < miter.length) { 3512 char *rec; 3513 u8 cond, type, non_seq, reset; 3514 u64 size, start, wp; 3515 3516 /* Swizzle zone descriptor */ 3517 rec = miter.addr + offset; 3518 type = rec[0] & 0xf; 3519 cond = (rec[1] >> 4) & 0xf; 3520 non_seq = (rec[1] & 2); 3521 reset = (rec[1] & 1); 3522 size = get_unaligned_le64(&rec[8]); 3523 start = get_unaligned_le64(&rec[16]); 3524 wp = get_unaligned_le64(&rec[24]); 3525 rec[0] = type; 3526 rec[1] = (cond << 4) | non_seq | reset; 3527 put_unaligned_be64(size, &rec[8]); 3528 put_unaligned_be64(start, &rec[16]); 3529 put_unaligned_be64(wp, &rec[24]); 3530 WARN_ON(offset + 64 > miter.length); 3531 offset += 64; 3532 bytes += 64; 3533 } 3534 } 3535 sg_miter_stop(&miter); 3536 local_irq_restore(flags); 3537 3538 ata_scsi_qc_complete(qc); 3539 } 3540 3541 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3542 { 3543 struct ata_taskfile *tf = &qc->tf; 3544 struct scsi_cmnd *scmd = qc->scsicmd; 3545 const u8 *cdb = scmd->cmnd; 3546 u16 sect, fp = (u16)-1; 3547 u8 sa, options, bp = 0xff; 3548 u64 block; 3549 u32 n_block; 3550 3551 if (unlikely(scmd->cmd_len < 16)) { 3552 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3553 scmd->cmd_len); 3554 fp = 15; 3555 goto invalid_fld; 3556 } 3557 scsi_16_lba_len(cdb, &block, &n_block); 3558 if (n_block != scsi_bufflen(scmd)) { 3559 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3560 n_block, scsi_bufflen(scmd)); 3561 goto invalid_param_len; 3562 } 3563 sa = cdb[1] & 0x1f; 3564 if (sa != ZI_REPORT_ZONES) { 3565 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3566 fp = 1; 3567 goto invalid_fld; 3568 } 3569 /* 3570 * ZAC allows only for transfers in 512 byte blocks, 3571 * and uses a 16 bit value for the transfer count. 3572 */ 3573 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3574 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3575 goto invalid_param_len; 3576 } 3577 sect = n_block / 512; 3578 options = cdb[14] & 0xbf; 3579 3580 if (ata_ncq_enabled(qc->dev) && 3581 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3582 tf->protocol = ATA_PROT_NCQ; 3583 tf->command = ATA_CMD_FPDMA_RECV; 3584 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3585 tf->nsect = qc->hw_tag << 3; 3586 tf->feature = sect & 0xff; 3587 tf->hob_feature = (sect >> 8) & 0xff; 3588 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3589 } else { 3590 tf->command = ATA_CMD_ZAC_MGMT_IN; 3591 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3592 tf->protocol = ATA_PROT_DMA; 3593 tf->hob_feature = options; 3594 tf->hob_nsect = (sect >> 8) & 0xff; 3595 tf->nsect = sect & 0xff; 3596 } 3597 tf->device = ATA_LBA; 3598 tf->lbah = (block >> 16) & 0xff; 3599 tf->lbam = (block >> 8) & 0xff; 3600 tf->lbal = block & 0xff; 3601 tf->hob_lbah = (block >> 40) & 0xff; 3602 tf->hob_lbam = (block >> 32) & 0xff; 3603 tf->hob_lbal = (block >> 24) & 0xff; 3604 3605 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3606 qc->flags |= ATA_QCFLAG_RESULT_TF; 3607 3608 ata_qc_set_pc_nbytes(qc); 3609 3610 qc->complete_fn = ata_scsi_report_zones_complete; 3611 3612 return 0; 3613 3614 invalid_fld: 3615 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3616 return 1; 3617 3618 invalid_param_len: 3619 /* "Parameter list length error" */ 3620 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3621 return 1; 3622 } 3623 3624 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3625 { 3626 struct ata_taskfile *tf = &qc->tf; 3627 struct scsi_cmnd *scmd = qc->scsicmd; 3628 struct ata_device *dev = qc->dev; 3629 const u8 *cdb = scmd->cmnd; 3630 u8 all, sa; 3631 u64 block; 3632 u32 n_block; 3633 u16 fp = (u16)-1; 3634 3635 if (unlikely(scmd->cmd_len < 16)) { 3636 fp = 15; 3637 goto invalid_fld; 3638 } 3639 3640 sa = cdb[1] & 0x1f; 3641 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3642 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3643 fp = 1; 3644 goto invalid_fld; 3645 } 3646 3647 scsi_16_lba_len(cdb, &block, &n_block); 3648 if (n_block) { 3649 /* 3650 * ZAC MANAGEMENT OUT doesn't define any length 3651 */ 3652 goto invalid_param_len; 3653 } 3654 3655 all = cdb[14] & 0x1; 3656 if (all) { 3657 /* 3658 * Ignore the block address (zone ID) as defined by ZBC. 3659 */ 3660 block = 0; 3661 } else if (block >= dev->n_sectors) { 3662 /* 3663 * Block must be a valid zone ID (a zone start LBA). 3664 */ 3665 fp = 2; 3666 goto invalid_fld; 3667 } 3668 3669 if (ata_ncq_enabled(qc->dev) && 3670 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3671 tf->protocol = ATA_PROT_NCQ_NODATA; 3672 tf->command = ATA_CMD_NCQ_NON_DATA; 3673 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3674 tf->nsect = qc->hw_tag << 3; 3675 tf->auxiliary = sa | ((u16)all << 8); 3676 } else { 3677 tf->protocol = ATA_PROT_NODATA; 3678 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3679 tf->feature = sa; 3680 tf->hob_feature = all; 3681 } 3682 tf->lbah = (block >> 16) & 0xff; 3683 tf->lbam = (block >> 8) & 0xff; 3684 tf->lbal = block & 0xff; 3685 tf->hob_lbah = (block >> 40) & 0xff; 3686 tf->hob_lbam = (block >> 32) & 0xff; 3687 tf->hob_lbal = (block >> 24) & 0xff; 3688 tf->device = ATA_LBA; 3689 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3690 3691 return 0; 3692 3693 invalid_fld: 3694 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3695 return 1; 3696 invalid_param_len: 3697 /* "Parameter list length error" */ 3698 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3699 return 1; 3700 } 3701 3702 /** 3703 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3704 * @qc: Storage for translated ATA taskfile 3705 * @buf: input buffer 3706 * @len: number of valid bytes in the input buffer 3707 * @fp: out parameter for the failed field on error 3708 * 3709 * Prepare a taskfile to modify caching information for the device. 3710 * 3711 * LOCKING: 3712 * None. 3713 */ 3714 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3715 const u8 *buf, int len, u16 *fp) 3716 { 3717 struct ata_taskfile *tf = &qc->tf; 3718 struct ata_device *dev = qc->dev; 3719 u8 mpage[CACHE_MPAGE_LEN]; 3720 u8 wce; 3721 int i; 3722 3723 /* 3724 * The first two bytes of def_cache_mpage are a header, so offsets 3725 * in mpage are off by 2 compared to buf. Same for len. 3726 */ 3727 3728 if (len != CACHE_MPAGE_LEN - 2) { 3729 *fp = min(len, CACHE_MPAGE_LEN - 2); 3730 return -EINVAL; 3731 } 3732 3733 wce = buf[0] & (1 << 2); 3734 3735 /* 3736 * Check that read-only bits are not modified. 3737 */ 3738 ata_msense_caching(dev->id, mpage, false); 3739 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3740 if (i == 0) 3741 continue; 3742 if (mpage[i + 2] != buf[i]) { 3743 *fp = i; 3744 return -EINVAL; 3745 } 3746 } 3747 3748 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3749 tf->protocol = ATA_PROT_NODATA; 3750 tf->nsect = 0; 3751 tf->command = ATA_CMD_SET_FEATURES; 3752 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3753 return 0; 3754 } 3755 3756 /* 3757 * Simulate MODE SELECT control mode page, sub-page 0. 3758 */ 3759 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3760 const u8 *buf, int len, u16 *fp) 3761 { 3762 struct ata_device *dev = qc->dev; 3763 u8 mpage[CONTROL_MPAGE_LEN]; 3764 u8 d_sense; 3765 int i; 3766 3767 /* 3768 * The first two bytes of def_control_mpage are a header, so offsets 3769 * in mpage are off by 2 compared to buf. Same for len. 3770 */ 3771 3772 if (len != CONTROL_MPAGE_LEN - 2) { 3773 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3774 return -EINVAL; 3775 } 3776 3777 d_sense = buf[0] & (1 << 2); 3778 3779 /* 3780 * Check that read-only bits are not modified. 3781 */ 3782 ata_msense_control_spg0(dev, mpage, false); 3783 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3784 if (i == 0) 3785 continue; 3786 if (mpage[2 + i] != buf[i]) { 3787 *fp = i; 3788 return -EINVAL; 3789 } 3790 } 3791 if (d_sense & (1 << 2)) 3792 dev->flags |= ATA_DFLAG_D_SENSE; 3793 else 3794 dev->flags &= ~ATA_DFLAG_D_SENSE; 3795 return 0; 3796 } 3797 3798 /* 3799 * Translate MODE SELECT control mode page, sub-pages f2h (ATA feature mode 3800 * page) into a SET FEATURES command. 3801 */ 3802 static unsigned int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 3803 const u8 *buf, int len, 3804 u16 *fp) 3805 { 3806 struct ata_device *dev = qc->dev; 3807 struct ata_taskfile *tf = &qc->tf; 3808 u8 cdl_action; 3809 3810 /* 3811 * The first four bytes of ATA Feature Control mode page are a header, 3812 * so offsets in mpage are off by 4 compared to buf. Same for len. 3813 */ 3814 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 3815 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 3816 return -EINVAL; 3817 } 3818 3819 /* Check cdl_ctrl */ 3820 switch (buf[0] & 0x03) { 3821 case 0: 3822 /* Disable CDL */ 3823 cdl_action = 0; 3824 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 3825 break; 3826 case 0x02: 3827 /* Enable CDL T2A/T2B: NCQ priority must be disabled */ 3828 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 3829 ata_dev_err(dev, 3830 "NCQ priority must be disabled to enable CDL\n"); 3831 return -EINVAL; 3832 } 3833 cdl_action = 1; 3834 dev->flags |= ATA_DFLAG_CDL_ENABLED; 3835 break; 3836 default: 3837 *fp = 0; 3838 return -EINVAL; 3839 } 3840 3841 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3842 tf->protocol = ATA_PROT_NODATA; 3843 tf->command = ATA_CMD_SET_FEATURES; 3844 tf->feature = SETFEATURES_CDL; 3845 tf->nsect = cdl_action; 3846 3847 return 1; 3848 } 3849 3850 /** 3851 * ata_mselect_control - Simulate MODE SELECT for control page 3852 * @qc: Storage for translated ATA taskfile 3853 * @buf: input buffer 3854 * @len: number of valid bytes in the input buffer 3855 * @fp: out parameter for the failed field on error 3856 * 3857 * Prepare a taskfile to modify caching information for the device. 3858 * 3859 * LOCKING: 3860 * None. 3861 */ 3862 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 3863 const u8 *buf, int len, u16 *fp) 3864 { 3865 switch (spg) { 3866 case 0: 3867 return ata_mselect_control_spg0(qc, buf, len, fp); 3868 case ATA_FEATURE_SUB_MPAGE: 3869 return ata_mselect_control_ata_feature(qc, buf, len, fp); 3870 default: 3871 return -EINVAL; 3872 } 3873 } 3874 3875 /** 3876 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3877 * @qc: Storage for translated ATA taskfile 3878 * 3879 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3880 * Assume this is invoked for direct access devices (e.g. disks) only. 3881 * There should be no block descriptor for other device types. 3882 * 3883 * LOCKING: 3884 * spin_lock_irqsave(host lock) 3885 */ 3886 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3887 { 3888 struct scsi_cmnd *scmd = qc->scsicmd; 3889 const u8 *cdb = scmd->cmnd; 3890 u8 pg, spg; 3891 unsigned six_byte, pg_len, hdr_len, bd_len; 3892 int len, ret; 3893 u16 fp = (u16)-1; 3894 u8 bp = 0xff; 3895 u8 buffer[64]; 3896 const u8 *p = buffer; 3897 3898 six_byte = (cdb[0] == MODE_SELECT); 3899 if (six_byte) { 3900 if (scmd->cmd_len < 5) { 3901 fp = 4; 3902 goto invalid_fld; 3903 } 3904 3905 len = cdb[4]; 3906 hdr_len = 4; 3907 } else { 3908 if (scmd->cmd_len < 9) { 3909 fp = 8; 3910 goto invalid_fld; 3911 } 3912 3913 len = get_unaligned_be16(&cdb[7]); 3914 hdr_len = 8; 3915 } 3916 3917 /* We only support PF=1, SP=0. */ 3918 if ((cdb[1] & 0x11) != 0x10) { 3919 fp = 1; 3920 bp = (cdb[1] & 0x01) ? 1 : 5; 3921 goto invalid_fld; 3922 } 3923 3924 /* Test early for possible overrun. */ 3925 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3926 goto invalid_param_len; 3927 3928 /* Move past header and block descriptors. */ 3929 if (len < hdr_len) 3930 goto invalid_param_len; 3931 3932 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3933 buffer, sizeof(buffer))) 3934 goto invalid_param_len; 3935 3936 if (six_byte) 3937 bd_len = p[3]; 3938 else 3939 bd_len = get_unaligned_be16(&p[6]); 3940 3941 len -= hdr_len; 3942 p += hdr_len; 3943 if (len < bd_len) 3944 goto invalid_param_len; 3945 if (bd_len != 0 && bd_len != 8) { 3946 fp = (six_byte) ? 3 : 6; 3947 fp += bd_len + hdr_len; 3948 goto invalid_param; 3949 } 3950 3951 len -= bd_len; 3952 p += bd_len; 3953 if (len == 0) 3954 goto skip; 3955 3956 /* Parse both possible formats for the mode page headers. */ 3957 pg = p[0] & 0x3f; 3958 if (p[0] & 0x40) { 3959 if (len < 4) 3960 goto invalid_param_len; 3961 3962 spg = p[1]; 3963 pg_len = get_unaligned_be16(&p[2]); 3964 p += 4; 3965 len -= 4; 3966 } else { 3967 if (len < 2) 3968 goto invalid_param_len; 3969 3970 spg = 0; 3971 pg_len = p[1]; 3972 p += 2; 3973 len -= 2; 3974 } 3975 3976 /* 3977 * Supported subpages: all subpages and ATA feature sub-page f2h of 3978 * the control page. 3979 */ 3980 if (spg) { 3981 switch (spg) { 3982 case ALL_SUB_MPAGES: 3983 /* All subpages is not supported for the control page */ 3984 if (pg == CONTROL_MPAGE) { 3985 fp = (p[0] & 0x40) ? 1 : 0; 3986 fp += hdr_len + bd_len; 3987 goto invalid_param; 3988 } 3989 break; 3990 case ATA_FEATURE_SUB_MPAGE: 3991 if (qc->dev->flags & ATA_DFLAG_CDL && 3992 pg == CONTROL_MPAGE) 3993 break; 3994 fallthrough; 3995 default: 3996 fp = (p[0] & 0x40) ? 1 : 0; 3997 fp += hdr_len + bd_len; 3998 goto invalid_param; 3999 } 4000 } 4001 if (pg_len > len) 4002 goto invalid_param_len; 4003 4004 switch (pg) { 4005 case CACHE_MPAGE: 4006 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4007 fp += hdr_len + bd_len; 4008 goto invalid_param; 4009 } 4010 break; 4011 case CONTROL_MPAGE: 4012 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 4013 if (ret < 0) { 4014 fp += hdr_len + bd_len; 4015 goto invalid_param; 4016 } 4017 if (!ret) 4018 goto skip; /* No ATA command to send */ 4019 break; 4020 default: 4021 /* Invalid page code */ 4022 fp = bd_len + hdr_len; 4023 goto invalid_param; 4024 } 4025 4026 /* 4027 * Only one page has changeable data, so we only support setting one 4028 * page at a time. 4029 */ 4030 if (len > pg_len) 4031 goto invalid_param; 4032 4033 return 0; 4034 4035 invalid_fld: 4036 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4037 return 1; 4038 4039 invalid_param: 4040 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4041 return 1; 4042 4043 invalid_param_len: 4044 /* "Parameter list length error" */ 4045 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4046 return 1; 4047 4048 skip: 4049 scmd->result = SAM_STAT_GOOD; 4050 return 1; 4051 } 4052 4053 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4054 { 4055 if (len == 0) 4056 return ATA_CMD_TRUSTED_NONDATA; 4057 else if (send) 4058 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4059 else 4060 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4061 } 4062 4063 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4064 { 4065 struct scsi_cmnd *scmd = qc->scsicmd; 4066 const u8 *cdb = scmd->cmnd; 4067 struct ata_taskfile *tf = &qc->tf; 4068 u8 secp = cdb[1]; 4069 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4070 u16 spsp = get_unaligned_be16(&cdb[2]); 4071 u32 len = get_unaligned_be32(&cdb[6]); 4072 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4073 4074 /* 4075 * We don't support the ATA "security" protocol. 4076 */ 4077 if (secp == 0xef) { 4078 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4079 return 1; 4080 } 4081 4082 if (cdb[4] & 7) { /* INC_512 */ 4083 if (len > 0xffff) { 4084 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4085 return 1; 4086 } 4087 } else { 4088 if (len > 0x01fffe00) { 4089 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4090 return 1; 4091 } 4092 4093 /* convert to the sector-based ATA addressing */ 4094 len = (len + 511) / 512; 4095 } 4096 4097 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4098 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4099 if (send) 4100 tf->flags |= ATA_TFLAG_WRITE; 4101 tf->command = ata_scsi_trusted_op(len, send, dma); 4102 tf->feature = secp; 4103 tf->lbam = spsp & 0xff; 4104 tf->lbah = spsp >> 8; 4105 4106 if (len) { 4107 tf->nsect = len & 0xff; 4108 tf->lbal = len >> 8; 4109 } else { 4110 if (!send) 4111 tf->lbah = (1 << 7); 4112 } 4113 4114 ata_qc_set_pc_nbytes(qc); 4115 return 0; 4116 } 4117 4118 /** 4119 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4120 * @qc: Command to be translated 4121 * 4122 * Translate a SCSI variable length CDB to specified commands. 4123 * It checks a service action value in CDB to call corresponding handler. 4124 * 4125 * RETURNS: 4126 * Zero on success, non-zero on failure 4127 * 4128 */ 4129 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4130 { 4131 struct scsi_cmnd *scmd = qc->scsicmd; 4132 const u8 *cdb = scmd->cmnd; 4133 const u16 sa = get_unaligned_be16(&cdb[8]); 4134 4135 /* 4136 * if service action represents a ata pass-thru(32) command, 4137 * then pass it to ata_scsi_pass_thru handler. 4138 */ 4139 if (sa == ATA_32) 4140 return ata_scsi_pass_thru(qc); 4141 4142 /* unsupported service action */ 4143 return 1; 4144 } 4145 4146 /** 4147 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4148 * @dev: ATA device 4149 * @cmd: SCSI command opcode to consider 4150 * 4151 * Look up the SCSI command given, and determine whether the 4152 * SCSI command is to be translated or simulated. 4153 * 4154 * RETURNS: 4155 * Pointer to translation function if possible, %NULL if not. 4156 */ 4157 4158 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4159 { 4160 switch (cmd) { 4161 case READ_6: 4162 case READ_10: 4163 case READ_16: 4164 4165 case WRITE_6: 4166 case WRITE_10: 4167 case WRITE_16: 4168 return ata_scsi_rw_xlat; 4169 4170 case WRITE_SAME_16: 4171 return ata_scsi_write_same_xlat; 4172 4173 case SYNCHRONIZE_CACHE: 4174 case SYNCHRONIZE_CACHE_16: 4175 if (ata_try_flush_cache(dev)) 4176 return ata_scsi_flush_xlat; 4177 break; 4178 4179 case VERIFY: 4180 case VERIFY_16: 4181 return ata_scsi_verify_xlat; 4182 4183 case ATA_12: 4184 case ATA_16: 4185 return ata_scsi_pass_thru; 4186 4187 case VARIABLE_LENGTH_CMD: 4188 return ata_scsi_var_len_cdb_xlat; 4189 4190 case MODE_SELECT: 4191 case MODE_SELECT_10: 4192 return ata_scsi_mode_select_xlat; 4193 4194 case ZBC_IN: 4195 return ata_scsi_zbc_in_xlat; 4196 4197 case ZBC_OUT: 4198 return ata_scsi_zbc_out_xlat; 4199 4200 case SECURITY_PROTOCOL_IN: 4201 case SECURITY_PROTOCOL_OUT: 4202 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4203 break; 4204 return ata_scsi_security_inout_xlat; 4205 4206 case START_STOP: 4207 return ata_scsi_start_stop_xlat; 4208 } 4209 4210 return NULL; 4211 } 4212 4213 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4214 { 4215 struct ata_port *ap = dev->link->ap; 4216 u8 scsi_op = scmd->cmnd[0]; 4217 ata_xlat_func_t xlat_func; 4218 4219 /* 4220 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4221 * However, this check is done without holding the ap->lock (a libata 4222 * specific lock), so we can have received an error irq since then, 4223 * therefore we must check if EH is pending, while holding ap->lock. 4224 */ 4225 if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) 4226 return SCSI_MLQUEUE_DEVICE_BUSY; 4227 4228 if (unlikely(!scmd->cmd_len)) 4229 goto bad_cdb_len; 4230 4231 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4232 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4233 goto bad_cdb_len; 4234 4235 xlat_func = ata_get_xlat_func(dev, scsi_op); 4236 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4237 /* relay SCSI command to ATAPI device */ 4238 int len = COMMAND_SIZE(scsi_op); 4239 4240 if (unlikely(len > scmd->cmd_len || 4241 len > dev->cdb_len || 4242 scmd->cmd_len > ATAPI_CDB_LEN)) 4243 goto bad_cdb_len; 4244 4245 xlat_func = atapi_xlat; 4246 } else { 4247 /* ATA_16 passthru, treat as an ATA command */ 4248 if (unlikely(scmd->cmd_len > 16)) 4249 goto bad_cdb_len; 4250 4251 xlat_func = ata_get_xlat_func(dev, scsi_op); 4252 } 4253 4254 if (xlat_func) 4255 return ata_scsi_translate(dev, scmd, xlat_func); 4256 4257 ata_scsi_simulate(dev, scmd); 4258 4259 return 0; 4260 4261 bad_cdb_len: 4262 scmd->result = DID_ERROR << 16; 4263 scsi_done(scmd); 4264 return 0; 4265 } 4266 4267 /** 4268 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4269 * @shost: SCSI host of command to be sent 4270 * @cmd: SCSI command to be sent 4271 * 4272 * In some cases, this function translates SCSI commands into 4273 * ATA taskfiles, and queues the taskfiles to be sent to 4274 * hardware. In other cases, this function simulates a 4275 * SCSI device by evaluating and responding to certain 4276 * SCSI commands. This creates the overall effect of 4277 * ATA and ATAPI devices appearing as SCSI devices. 4278 * 4279 * LOCKING: 4280 * ATA host lock 4281 * 4282 * RETURNS: 4283 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4284 * 0 otherwise. 4285 */ 4286 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4287 { 4288 struct ata_port *ap; 4289 struct ata_device *dev; 4290 struct scsi_device *scsidev = cmd->device; 4291 int rc = 0; 4292 unsigned long irq_flags; 4293 4294 ap = ata_shost_to_port(shost); 4295 4296 spin_lock_irqsave(ap->lock, irq_flags); 4297 4298 dev = ata_scsi_find_dev(ap, scsidev); 4299 if (likely(dev)) 4300 rc = __ata_scsi_queuecmd(cmd, dev); 4301 else { 4302 cmd->result = (DID_BAD_TARGET << 16); 4303 scsi_done(cmd); 4304 } 4305 4306 spin_unlock_irqrestore(ap->lock, irq_flags); 4307 4308 return rc; 4309 } 4310 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4311 4312 /** 4313 * ata_scsi_simulate - simulate SCSI command on ATA device 4314 * @dev: the target device 4315 * @cmd: SCSI command being sent to device. 4316 * 4317 * Interprets and directly executes a select list of SCSI commands 4318 * that can be handled internally. 4319 * 4320 * LOCKING: 4321 * spin_lock_irqsave(host lock) 4322 */ 4323 4324 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4325 { 4326 struct ata_scsi_args args; 4327 const u8 *scsicmd = cmd->cmnd; 4328 u8 tmp8; 4329 4330 args.dev = dev; 4331 args.id = dev->id; 4332 args.cmd = cmd; 4333 4334 switch(scsicmd[0]) { 4335 case INQUIRY: 4336 if (scsicmd[1] & 2) /* is CmdDt set? */ 4337 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4338 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4339 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4340 else switch (scsicmd[2]) { 4341 case 0x00: 4342 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4343 break; 4344 case 0x80: 4345 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4346 break; 4347 case 0x83: 4348 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4349 break; 4350 case 0x89: 4351 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4352 break; 4353 case 0xb0: 4354 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4355 break; 4356 case 0xb1: 4357 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4358 break; 4359 case 0xb2: 4360 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4361 break; 4362 case 0xb6: 4363 if (dev->flags & ATA_DFLAG_ZAC) 4364 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4365 else 4366 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4367 break; 4368 case 0xb9: 4369 if (dev->cpr_log) 4370 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4371 else 4372 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4373 break; 4374 default: 4375 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4376 break; 4377 } 4378 break; 4379 4380 case MODE_SENSE: 4381 case MODE_SENSE_10: 4382 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4383 break; 4384 4385 case READ_CAPACITY: 4386 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4387 break; 4388 4389 case SERVICE_ACTION_IN_16: 4390 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4391 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4392 else 4393 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4394 break; 4395 4396 case REPORT_LUNS: 4397 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4398 break; 4399 4400 case REQUEST_SENSE: 4401 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4402 break; 4403 4404 /* if we reach this, then writeback caching is disabled, 4405 * turning this into a no-op. 4406 */ 4407 case SYNCHRONIZE_CACHE: 4408 case SYNCHRONIZE_CACHE_16: 4409 fallthrough; 4410 4411 /* no-op's, complete with success */ 4412 case REZERO_UNIT: 4413 case SEEK_6: 4414 case SEEK_10: 4415 case TEST_UNIT_READY: 4416 break; 4417 4418 case SEND_DIAGNOSTIC: 4419 tmp8 = scsicmd[1] & ~(1 << 3); 4420 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4421 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4422 break; 4423 4424 case MAINTENANCE_IN: 4425 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4426 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4427 else 4428 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4429 break; 4430 4431 /* all other commands */ 4432 default: 4433 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4434 /* "Invalid command operation code" */ 4435 break; 4436 } 4437 4438 scsi_done(cmd); 4439 } 4440 4441 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4442 { 4443 int i, rc; 4444 4445 for (i = 0; i < host->n_ports; i++) { 4446 struct ata_port *ap = host->ports[i]; 4447 struct Scsi_Host *shost; 4448 4449 rc = -ENOMEM; 4450 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4451 if (!shost) 4452 goto err_alloc; 4453 4454 shost->eh_noresume = 1; 4455 *(struct ata_port **)&shost->hostdata[0] = ap; 4456 ap->scsi_host = shost; 4457 4458 shost->transportt = ata_scsi_transport_template; 4459 shost->unique_id = ap->print_id; 4460 shost->max_id = 16; 4461 shost->max_lun = 1; 4462 shost->max_channel = 1; 4463 shost->max_cmd_len = 32; 4464 4465 /* Schedule policy is determined by ->qc_defer() 4466 * callback and it needs to see every deferred qc. 4467 * Set host_blocked to 1 to prevent SCSI midlayer from 4468 * automatically deferring requests. 4469 */ 4470 shost->max_host_blocked = 1; 4471 4472 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4473 if (rc) 4474 goto err_alloc; 4475 } 4476 4477 return 0; 4478 4479 err_alloc: 4480 while (--i >= 0) { 4481 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4482 4483 /* scsi_host_put() is in ata_devres_release() */ 4484 scsi_remove_host(shost); 4485 } 4486 return rc; 4487 } 4488 4489 #ifdef CONFIG_OF 4490 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4491 { 4492 struct scsi_device *sdev = dev->sdev; 4493 struct device *d = ap->host->dev; 4494 struct device_node *np = d->of_node; 4495 struct device_node *child; 4496 4497 for_each_available_child_of_node(np, child) { 4498 int ret; 4499 u32 val; 4500 4501 ret = of_property_read_u32(child, "reg", &val); 4502 if (ret) 4503 continue; 4504 if (val == dev->devno) { 4505 dev_dbg(d, "found matching device node\n"); 4506 sdev->sdev_gendev.of_node = child; 4507 return; 4508 } 4509 } 4510 } 4511 #else 4512 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4513 { 4514 } 4515 #endif 4516 4517 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4518 { 4519 int tries = 5; 4520 struct ata_device *last_failed_dev = NULL; 4521 struct ata_link *link; 4522 struct ata_device *dev; 4523 4524 repeat: 4525 ata_for_each_link(link, ap, EDGE) { 4526 ata_for_each_dev(dev, link, ENABLED) { 4527 struct scsi_device *sdev; 4528 int channel = 0, id = 0; 4529 4530 if (dev->sdev) 4531 continue; 4532 4533 if (ata_is_host_link(link)) 4534 id = dev->devno; 4535 else 4536 channel = link->pmp; 4537 4538 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4539 NULL); 4540 if (!IS_ERR(sdev)) { 4541 dev->sdev = sdev; 4542 ata_scsi_assign_ofnode(dev, ap); 4543 scsi_device_put(sdev); 4544 } else { 4545 dev->sdev = NULL; 4546 } 4547 } 4548 } 4549 4550 /* If we scanned while EH was in progress or allocation 4551 * failure occurred, scan would have failed silently. Check 4552 * whether all devices are attached. 4553 */ 4554 ata_for_each_link(link, ap, EDGE) { 4555 ata_for_each_dev(dev, link, ENABLED) { 4556 if (!dev->sdev) 4557 goto exit_loop; 4558 } 4559 } 4560 exit_loop: 4561 if (!link) 4562 return; 4563 4564 /* we're missing some SCSI devices */ 4565 if (sync) { 4566 /* If caller requested synchrnous scan && we've made 4567 * any progress, sleep briefly and repeat. 4568 */ 4569 if (dev != last_failed_dev) { 4570 msleep(100); 4571 last_failed_dev = dev; 4572 goto repeat; 4573 } 4574 4575 /* We might be failing to detect boot device, give it 4576 * a few more chances. 4577 */ 4578 if (--tries) { 4579 msleep(100); 4580 goto repeat; 4581 } 4582 4583 ata_port_err(ap, 4584 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4585 } 4586 4587 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4588 round_jiffies_relative(HZ)); 4589 } 4590 4591 /** 4592 * ata_scsi_offline_dev - offline attached SCSI device 4593 * @dev: ATA device to offline attached SCSI device for 4594 * 4595 * This function is called from ata_eh_hotplug() and responsible 4596 * for taking the SCSI device attached to @dev offline. This 4597 * function is called with host lock which protects dev->sdev 4598 * against clearing. 4599 * 4600 * LOCKING: 4601 * spin_lock_irqsave(host lock) 4602 * 4603 * RETURNS: 4604 * 1 if attached SCSI device exists, 0 otherwise. 4605 */ 4606 int ata_scsi_offline_dev(struct ata_device *dev) 4607 { 4608 if (dev->sdev) { 4609 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4610 return 1; 4611 } 4612 return 0; 4613 } 4614 4615 /** 4616 * ata_scsi_remove_dev - remove attached SCSI device 4617 * @dev: ATA device to remove attached SCSI device for 4618 * 4619 * This function is called from ata_eh_scsi_hotplug() and 4620 * responsible for removing the SCSI device attached to @dev. 4621 * 4622 * LOCKING: 4623 * Kernel thread context (may sleep). 4624 */ 4625 static void ata_scsi_remove_dev(struct ata_device *dev) 4626 { 4627 struct ata_port *ap = dev->link->ap; 4628 struct scsi_device *sdev; 4629 unsigned long flags; 4630 4631 /* Alas, we need to grab scan_mutex to ensure SCSI device 4632 * state doesn't change underneath us and thus 4633 * scsi_device_get() always succeeds. The mutex locking can 4634 * be removed if there is __scsi_device_get() interface which 4635 * increments reference counts regardless of device state. 4636 */ 4637 mutex_lock(&ap->scsi_host->scan_mutex); 4638 spin_lock_irqsave(ap->lock, flags); 4639 4640 /* clearing dev->sdev is protected by host lock */ 4641 sdev = dev->sdev; 4642 dev->sdev = NULL; 4643 4644 if (sdev) { 4645 /* If user initiated unplug races with us, sdev can go 4646 * away underneath us after the host lock and 4647 * scan_mutex are released. Hold onto it. 4648 */ 4649 if (scsi_device_get(sdev) == 0) { 4650 /* The following ensures the attached sdev is 4651 * offline on return from ata_scsi_offline_dev() 4652 * regardless it wins or loses the race 4653 * against this function. 4654 */ 4655 scsi_device_set_state(sdev, SDEV_OFFLINE); 4656 } else { 4657 WARN_ON(1); 4658 sdev = NULL; 4659 } 4660 } 4661 4662 spin_unlock_irqrestore(ap->lock, flags); 4663 mutex_unlock(&ap->scsi_host->scan_mutex); 4664 4665 if (sdev) { 4666 ata_dev_info(dev, "detaching (SCSI %s)\n", 4667 dev_name(&sdev->sdev_gendev)); 4668 4669 scsi_remove_device(sdev); 4670 scsi_device_put(sdev); 4671 } 4672 } 4673 4674 static void ata_scsi_handle_link_detach(struct ata_link *link) 4675 { 4676 struct ata_port *ap = link->ap; 4677 struct ata_device *dev; 4678 4679 ata_for_each_dev(dev, link, ALL) { 4680 unsigned long flags; 4681 4682 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4683 continue; 4684 4685 spin_lock_irqsave(ap->lock, flags); 4686 dev->flags &= ~ATA_DFLAG_DETACHED; 4687 spin_unlock_irqrestore(ap->lock, flags); 4688 4689 if (zpodd_dev_enabled(dev)) 4690 zpodd_exit(dev); 4691 4692 ata_scsi_remove_dev(dev); 4693 } 4694 } 4695 4696 /** 4697 * ata_scsi_media_change_notify - send media change event 4698 * @dev: Pointer to the disk device with media change event 4699 * 4700 * Tell the block layer to send a media change notification 4701 * event. 4702 * 4703 * LOCKING: 4704 * spin_lock_irqsave(host lock) 4705 */ 4706 void ata_scsi_media_change_notify(struct ata_device *dev) 4707 { 4708 if (dev->sdev) 4709 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4710 GFP_ATOMIC); 4711 } 4712 4713 /** 4714 * ata_scsi_hotplug - SCSI part of hotplug 4715 * @work: Pointer to ATA port to perform SCSI hotplug on 4716 * 4717 * Perform SCSI part of hotplug. It's executed from a separate 4718 * workqueue after EH completes. This is necessary because SCSI 4719 * hot plugging requires working EH and hot unplugging is 4720 * synchronized with hot plugging with a mutex. 4721 * 4722 * LOCKING: 4723 * Kernel thread context (may sleep). 4724 */ 4725 void ata_scsi_hotplug(struct work_struct *work) 4726 { 4727 struct ata_port *ap = 4728 container_of(work, struct ata_port, hotplug_task.work); 4729 int i; 4730 4731 if (ap->pflags & ATA_PFLAG_UNLOADING) 4732 return; 4733 4734 mutex_lock(&ap->scsi_scan_mutex); 4735 4736 /* Unplug detached devices. We cannot use link iterator here 4737 * because PMP links have to be scanned even if PMP is 4738 * currently not attached. Iterate manually. 4739 */ 4740 ata_scsi_handle_link_detach(&ap->link); 4741 if (ap->pmp_link) 4742 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4743 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4744 4745 /* scan for new ones */ 4746 ata_scsi_scan_host(ap, 0); 4747 4748 mutex_unlock(&ap->scsi_scan_mutex); 4749 } 4750 4751 /** 4752 * ata_scsi_user_scan - indication for user-initiated bus scan 4753 * @shost: SCSI host to scan 4754 * @channel: Channel to scan 4755 * @id: ID to scan 4756 * @lun: LUN to scan 4757 * 4758 * This function is called when user explicitly requests bus 4759 * scan. Set probe pending flag and invoke EH. 4760 * 4761 * LOCKING: 4762 * SCSI layer (we don't care) 4763 * 4764 * RETURNS: 4765 * Zero. 4766 */ 4767 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4768 unsigned int id, u64 lun) 4769 { 4770 struct ata_port *ap = ata_shost_to_port(shost); 4771 unsigned long flags; 4772 int devno, rc = 0; 4773 4774 if (!ap->ops->error_handler) 4775 return -EOPNOTSUPP; 4776 4777 if (lun != SCAN_WILD_CARD && lun) 4778 return -EINVAL; 4779 4780 if (!sata_pmp_attached(ap)) { 4781 if (channel != SCAN_WILD_CARD && channel) 4782 return -EINVAL; 4783 devno = id; 4784 } else { 4785 if (id != SCAN_WILD_CARD && id) 4786 return -EINVAL; 4787 devno = channel; 4788 } 4789 4790 spin_lock_irqsave(ap->lock, flags); 4791 4792 if (devno == SCAN_WILD_CARD) { 4793 struct ata_link *link; 4794 4795 ata_for_each_link(link, ap, EDGE) { 4796 struct ata_eh_info *ehi = &link->eh_info; 4797 ehi->probe_mask |= ATA_ALL_DEVICES; 4798 ehi->action |= ATA_EH_RESET; 4799 } 4800 } else { 4801 struct ata_device *dev = ata_find_dev(ap, devno); 4802 4803 if (dev) { 4804 struct ata_eh_info *ehi = &dev->link->eh_info; 4805 ehi->probe_mask |= 1 << dev->devno; 4806 ehi->action |= ATA_EH_RESET; 4807 } else 4808 rc = -EINVAL; 4809 } 4810 4811 if (rc == 0) { 4812 ata_port_schedule_eh(ap); 4813 spin_unlock_irqrestore(ap->lock, flags); 4814 ata_port_wait_eh(ap); 4815 } else 4816 spin_unlock_irqrestore(ap->lock, flags); 4817 4818 return rc; 4819 } 4820 4821 /** 4822 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4823 * @work: Pointer to ATA port to perform scsi_rescan_device() 4824 * 4825 * After ATA pass thru (SAT) commands are executed successfully, 4826 * libata need to propagate the changes to SCSI layer. 4827 * 4828 * LOCKING: 4829 * Kernel thread context (may sleep). 4830 */ 4831 void ata_scsi_dev_rescan(struct work_struct *work) 4832 { 4833 struct ata_port *ap = 4834 container_of(work, struct ata_port, scsi_rescan_task); 4835 struct ata_link *link; 4836 struct ata_device *dev; 4837 unsigned long flags; 4838 4839 mutex_lock(&ap->scsi_scan_mutex); 4840 spin_lock_irqsave(ap->lock, flags); 4841 4842 ata_for_each_link(link, ap, EDGE) { 4843 ata_for_each_dev(dev, link, ENABLED) { 4844 struct scsi_device *sdev = dev->sdev; 4845 4846 if (!sdev) 4847 continue; 4848 if (scsi_device_get(sdev)) 4849 continue; 4850 4851 spin_unlock_irqrestore(ap->lock, flags); 4852 scsi_rescan_device(&(sdev->sdev_gendev)); 4853 scsi_device_put(sdev); 4854 spin_lock_irqsave(ap->lock, flags); 4855 } 4856 } 4857 4858 spin_unlock_irqrestore(ap->lock, flags); 4859 mutex_unlock(&ap->scsi_scan_mutex); 4860 } 4861