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