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