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 <linux/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 ata_device *dev = qc->dev; 246 struct scsi_cmnd *cmd = qc->scsicmd; 247 struct ata_taskfile *tf = &qc->result_tf; 248 unsigned char *sb = cmd->sense_buffer; 249 250 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 251 ata_dev_dbg(dev, 252 "missing result TF: can't set ATA PT sense fields\n"); 253 return; 254 } 255 256 if ((sb[0] & 0x7f) >= 0x72) { 257 unsigned char *desc; 258 u8 len; 259 260 /* descriptor format */ 261 len = sb[7]; 262 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 263 if (!desc) { 264 if (SCSI_SENSE_BUFFERSIZE < len + 14) 265 return; 266 sb[7] = len + 14; 267 desc = sb + 8 + len; 268 } 269 desc[0] = 9; 270 desc[1] = 12; 271 /* 272 * Copy registers into sense buffer. 273 */ 274 desc[2] = 0x00; 275 desc[3] = tf->error; 276 desc[5] = tf->nsect; 277 desc[7] = tf->lbal; 278 desc[9] = tf->lbam; 279 desc[11] = tf->lbah; 280 desc[12] = tf->device; 281 desc[13] = tf->status; 282 283 /* 284 * Fill in Extend bit, and the high order bytes 285 * if applicable. 286 */ 287 if (tf->flags & ATA_TFLAG_LBA48) { 288 desc[2] |= 0x01; 289 desc[4] = tf->hob_nsect; 290 desc[6] = tf->hob_lbal; 291 desc[8] = tf->hob_lbam; 292 desc[10] = tf->hob_lbah; 293 } 294 } else { 295 /* Fixed sense format */ 296 sb[0] |= 0x80; 297 sb[3] = tf->error; 298 sb[4] = tf->status; 299 sb[5] = tf->device; 300 sb[6] = tf->nsect; 301 if (tf->flags & ATA_TFLAG_LBA48) { 302 sb[8] |= 0x80; 303 if (tf->hob_nsect) 304 sb[8] |= 0x40; 305 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 306 sb[8] |= 0x20; 307 } 308 sb[9] = tf->lbal; 309 sb[10] = tf->lbam; 310 sb[11] = tf->lbah; 311 } 312 } 313 314 static void ata_scsi_set_invalid_field(struct ata_device *dev, 315 struct scsi_cmnd *cmd, u16 field, u8 bit) 316 { 317 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 318 /* "Invalid field in CDB" */ 319 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 320 field, bit, 1); 321 } 322 323 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 324 struct scsi_cmnd *cmd, u16 field) 325 { 326 /* "Invalid field in parameter list" */ 327 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 328 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 329 field, 0xff, 0); 330 } 331 332 static struct attribute *ata_common_sdev_attrs[] = { 333 &dev_attr_unload_heads.attr, 334 NULL 335 }; 336 337 static const struct attribute_group ata_common_sdev_attr_group = { 338 .attrs = ata_common_sdev_attrs 339 }; 340 341 const struct attribute_group *ata_common_sdev_groups[] = { 342 &ata_common_sdev_attr_group, 343 NULL 344 }; 345 EXPORT_SYMBOL_GPL(ata_common_sdev_groups); 346 347 /** 348 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 349 * @sdev: SCSI device for which BIOS geometry is to be determined 350 * @bdev: block device associated with @sdev 351 * @capacity: capacity of SCSI device 352 * @geom: location to which geometry will be output 353 * 354 * Generic bios head/sector/cylinder calculator 355 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 356 * mapping. Some situations may arise where the disk is not 357 * bootable if this is not used. 358 * 359 * LOCKING: 360 * Defined by the SCSI layer. We don't really care. 361 * 362 * RETURNS: 363 * Zero. 364 */ 365 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 366 sector_t capacity, int geom[]) 367 { 368 geom[0] = 255; 369 geom[1] = 63; 370 sector_div(capacity, 255*63); 371 geom[2] = capacity; 372 373 return 0; 374 } 375 EXPORT_SYMBOL_GPL(ata_std_bios_param); 376 377 /** 378 * ata_scsi_unlock_native_capacity - unlock native capacity 379 * @sdev: SCSI device to adjust device capacity for 380 * 381 * This function is called if a partition on @sdev extends beyond 382 * the end of the device. It requests EH to unlock HPA. 383 * 384 * LOCKING: 385 * Defined by the SCSI layer. Might sleep. 386 */ 387 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 388 { 389 struct ata_port *ap = ata_shost_to_port(sdev->host); 390 struct ata_device *dev; 391 unsigned long flags; 392 393 spin_lock_irqsave(ap->lock, flags); 394 395 dev = ata_scsi_find_dev(ap, sdev); 396 if (dev && dev->n_sectors < dev->n_native_sectors) { 397 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 398 dev->link->eh_info.action |= ATA_EH_RESET; 399 ata_port_schedule_eh(ap); 400 } 401 402 spin_unlock_irqrestore(ap->lock, flags); 403 ata_port_wait_eh(ap); 404 } 405 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 406 407 /** 408 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 409 * @ap: target port 410 * @sdev: SCSI device to get identify data for 411 * @arg: User buffer area for identify data 412 * 413 * LOCKING: 414 * Defined by the SCSI layer. We don't really care. 415 * 416 * RETURNS: 417 * Zero on success, negative errno on error. 418 */ 419 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 420 void __user *arg) 421 { 422 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 423 u16 __user *dst = arg; 424 char buf[40]; 425 426 if (!dev) 427 return -ENOMSG; 428 429 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 430 return -EFAULT; 431 432 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 433 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 434 return -EFAULT; 435 436 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 437 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 438 return -EFAULT; 439 440 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 441 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 442 return -EFAULT; 443 444 return 0; 445 } 446 447 /** 448 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 449 * @scsidev: Device to which we are issuing command 450 * @arg: User provided data for issuing command 451 * 452 * LOCKING: 453 * Defined by the SCSI layer. We don't really care. 454 * 455 * RETURNS: 456 * Zero on success, negative errno on error. 457 */ 458 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 459 { 460 int rc = 0; 461 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 462 u8 scsi_cmd[MAX_COMMAND_SIZE]; 463 u8 args[4], *argbuf = NULL; 464 int argsize = 0; 465 struct scsi_sense_hdr sshdr; 466 const struct scsi_exec_args exec_args = { 467 .sshdr = &sshdr, 468 .sense = sensebuf, 469 .sense_len = sizeof(sensebuf), 470 }; 471 int cmd_result; 472 473 if (arg == NULL) 474 return -EINVAL; 475 476 if (copy_from_user(args, arg, sizeof(args))) 477 return -EFAULT; 478 479 memset(sensebuf, 0, sizeof(sensebuf)); 480 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 481 482 if (args[3]) { 483 argsize = ATA_SECT_SIZE * args[3]; 484 argbuf = kmalloc(argsize, GFP_KERNEL); 485 if (argbuf == NULL) { 486 rc = -ENOMEM; 487 goto error; 488 } 489 490 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 491 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 492 block count in sector count field */ 493 } else { 494 scsi_cmd[1] = (3 << 1); /* Non-data */ 495 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 496 } 497 498 scsi_cmd[0] = ATA_16; 499 500 scsi_cmd[4] = args[2]; 501 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 502 scsi_cmd[6] = args[3]; 503 scsi_cmd[8] = args[1]; 504 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 505 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 506 } else { 507 scsi_cmd[6] = args[1]; 508 } 509 scsi_cmd[14] = args[0]; 510 511 /* Good values for timeout and retries? Values below 512 from scsi_ioctl_send_command() for default case... */ 513 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, argbuf, 514 argsize, 10 * HZ, 5, &exec_args); 515 if (cmd_result < 0) { 516 rc = cmd_result; 517 goto error; 518 } 519 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 520 u8 *desc = sensebuf + 8; 521 522 /* If we set cc then ATA pass-through will cause a 523 * check condition even if no error. Filter that. */ 524 if (scsi_status_is_check_condition(cmd_result)) { 525 if (sshdr.sense_key == RECOVERED_ERROR && 526 sshdr.asc == 0 && sshdr.ascq == 0x1d) 527 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 528 } 529 530 /* Send userspace a few ATA registers (same as drivers/ide) */ 531 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 532 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 533 args[0] = desc[13]; /* status */ 534 args[1] = desc[3]; /* error */ 535 args[2] = desc[5]; /* sector count (0:7) */ 536 if (copy_to_user(arg, args, sizeof(args))) 537 rc = -EFAULT; 538 } 539 } 540 541 542 if (cmd_result) { 543 rc = -EIO; 544 goto error; 545 } 546 547 if ((argbuf) 548 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 549 rc = -EFAULT; 550 error: 551 kfree(argbuf); 552 return rc; 553 } 554 555 /** 556 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 557 * @scsidev: Device to which we are issuing command 558 * @arg: User provided data for issuing command 559 * 560 * LOCKING: 561 * Defined by the SCSI layer. We don't really care. 562 * 563 * RETURNS: 564 * Zero on success, negative errno on error. 565 */ 566 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 567 { 568 int rc = 0; 569 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 570 u8 scsi_cmd[MAX_COMMAND_SIZE]; 571 u8 args[7]; 572 struct scsi_sense_hdr sshdr; 573 int cmd_result; 574 const struct scsi_exec_args exec_args = { 575 .sshdr = &sshdr, 576 .sense = sensebuf, 577 .sense_len = sizeof(sensebuf), 578 }; 579 580 if (arg == NULL) 581 return -EINVAL; 582 583 if (copy_from_user(args, arg, sizeof(args))) 584 return -EFAULT; 585 586 memset(sensebuf, 0, sizeof(sensebuf)); 587 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 588 scsi_cmd[0] = ATA_16; 589 scsi_cmd[1] = (3 << 1); /* Non-data */ 590 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 591 scsi_cmd[4] = args[1]; 592 scsi_cmd[6] = args[2]; 593 scsi_cmd[8] = args[3]; 594 scsi_cmd[10] = args[4]; 595 scsi_cmd[12] = args[5]; 596 scsi_cmd[13] = args[6] & 0x4f; 597 scsi_cmd[14] = args[0]; 598 599 /* Good values for timeout and retries? Values below 600 from scsi_ioctl_send_command() for default case... */ 601 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, NULL, 602 0, 10 * HZ, 5, &exec_args); 603 if (cmd_result < 0) { 604 rc = cmd_result; 605 goto error; 606 } 607 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 608 u8 *desc = sensebuf + 8; 609 610 /* If we set cc then ATA pass-through will cause a 611 * check condition even if no error. Filter that. */ 612 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 613 if (sshdr.sense_key == RECOVERED_ERROR && 614 sshdr.asc == 0 && sshdr.ascq == 0x1d) 615 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 616 } 617 618 /* Send userspace ATA registers */ 619 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 620 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 621 args[0] = desc[13]; /* status */ 622 args[1] = desc[3]; /* error */ 623 args[2] = desc[5]; /* sector count (0:7) */ 624 args[3] = desc[7]; /* lbal */ 625 args[4] = desc[9]; /* lbam */ 626 args[5] = desc[11]; /* lbah */ 627 args[6] = desc[12]; /* select */ 628 if (copy_to_user(arg, args, sizeof(args))) 629 rc = -EFAULT; 630 } 631 } 632 633 if (cmd_result) { 634 rc = -EIO; 635 goto error; 636 } 637 638 error: 639 return rc; 640 } 641 642 static bool ata_ioc32(struct ata_port *ap) 643 { 644 if (ap->flags & ATA_FLAG_PIO_DMA) 645 return true; 646 if (ap->pflags & ATA_PFLAG_PIO32) 647 return true; 648 return false; 649 } 650 651 /* 652 * This handles both native and compat commands, so anything added 653 * here must have a compatible argument, or check in_compat_syscall() 654 */ 655 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 656 unsigned int cmd, void __user *arg) 657 { 658 unsigned long val; 659 int rc = -EINVAL; 660 unsigned long flags; 661 662 switch (cmd) { 663 case HDIO_GET_32BIT: 664 spin_lock_irqsave(ap->lock, flags); 665 val = ata_ioc32(ap); 666 spin_unlock_irqrestore(ap->lock, flags); 667 #ifdef CONFIG_COMPAT 668 if (in_compat_syscall()) 669 return put_user(val, (compat_ulong_t __user *)arg); 670 #endif 671 return put_user(val, (unsigned long __user *)arg); 672 673 case HDIO_SET_32BIT: 674 val = (unsigned long) arg; 675 rc = 0; 676 spin_lock_irqsave(ap->lock, flags); 677 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 678 if (val) 679 ap->pflags |= ATA_PFLAG_PIO32; 680 else 681 ap->pflags &= ~ATA_PFLAG_PIO32; 682 } else { 683 if (val != ata_ioc32(ap)) 684 rc = -EINVAL; 685 } 686 spin_unlock_irqrestore(ap->lock, flags); 687 return rc; 688 689 case HDIO_GET_IDENTITY: 690 return ata_get_identity(ap, scsidev, arg); 691 692 case HDIO_DRIVE_CMD: 693 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 694 return -EACCES; 695 return ata_cmd_ioctl(scsidev, arg); 696 697 case HDIO_DRIVE_TASK: 698 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 699 return -EACCES; 700 return ata_task_ioctl(scsidev, arg); 701 702 default: 703 rc = -ENOTTY; 704 break; 705 } 706 707 return rc; 708 } 709 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 710 711 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 712 void __user *arg) 713 { 714 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 715 scsidev, cmd, arg); 716 } 717 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 718 719 /** 720 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 721 * @dev: ATA device to which the new command is attached 722 * @cmd: SCSI command that originated this ATA command 723 * 724 * Obtain a reference to an unused ata_queued_cmd structure, 725 * which is the basic libata structure representing a single 726 * ATA command sent to the hardware. 727 * 728 * If a command was available, fill in the SCSI-specific 729 * portions of the structure with information on the 730 * current command. 731 * 732 * LOCKING: 733 * spin_lock_irqsave(host lock) 734 * 735 * RETURNS: 736 * Command allocated, or %NULL if none available. 737 */ 738 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 739 struct scsi_cmnd *cmd) 740 { 741 struct ata_port *ap = dev->link->ap; 742 struct ata_queued_cmd *qc; 743 int tag; 744 745 if (unlikely(ata_port_is_frozen(ap))) 746 goto fail; 747 748 if (ap->flags & ATA_FLAG_SAS_HOST) { 749 /* 750 * SAS hosts may queue > ATA_MAX_QUEUE commands so use 751 * unique per-device budget token as a tag. 752 */ 753 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE)) 754 goto fail; 755 tag = cmd->budget_token; 756 } else { 757 tag = scsi_cmd_to_rq(cmd)->tag; 758 } 759 760 qc = __ata_qc_from_tag(ap, tag); 761 qc->tag = qc->hw_tag = tag; 762 qc->ap = ap; 763 qc->dev = dev; 764 765 ata_qc_reinit(qc); 766 767 qc->scsicmd = cmd; 768 qc->scsidone = scsi_done; 769 770 qc->sg = scsi_sglist(cmd); 771 qc->n_elem = scsi_sg_count(cmd); 772 773 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 774 qc->flags |= ATA_QCFLAG_QUIET; 775 776 return qc; 777 778 fail: 779 set_host_byte(cmd, DID_OK); 780 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL); 781 scsi_done(cmd); 782 return NULL; 783 } 784 785 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 786 { 787 struct scsi_cmnd *scmd = qc->scsicmd; 788 789 qc->extrabytes = scmd->extra_len; 790 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 791 } 792 793 /** 794 * ata_to_sense_error - convert ATA error to SCSI error 795 * @drv_stat: value contained in ATA status register 796 * @drv_err: value contained in ATA error register 797 * @sk: the sense key we'll fill out 798 * @asc: the additional sense code we'll fill out 799 * @ascq: the additional sense code qualifier we'll fill out 800 * 801 * Converts an ATA error into a SCSI error. Fill out pointers to 802 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 803 * format sense blocks. 804 * 805 * LOCKING: 806 * spin_lock_irqsave(host lock) 807 */ 808 static void ata_to_sense_error(u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, 809 u8 *ascq) 810 { 811 int i; 812 813 /* Based on the 3ware driver translation table */ 814 static const unsigned char sense_table[][4] = { 815 /* BBD|ECC|ID|MAR */ 816 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 817 // Device busy Aborted command 818 /* BBD|ECC|ID */ 819 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 820 // Device busy Aborted command 821 /* ECC|MC|MARK */ 822 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 823 // Device fault Hardware error 824 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 825 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 826 // Data CRC error SCSI parity error 827 /* MC|ID|ABRT|TRK0|MARK */ 828 {0x37, NOT_READY, 0x04, 0x00}, 829 // Unit offline Not ready 830 /* MCR|MARK */ 831 {0x09, NOT_READY, 0x04, 0x00}, 832 // Unrecovered disk error Not ready 833 /* Bad address mark */ 834 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 835 // Address mark not found for data field 836 /* TRK0 - Track 0 not found */ 837 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 838 // Hardware error 839 /* Abort: 0x04 is not translated here, see below */ 840 /* Media change request */ 841 {0x08, NOT_READY, 0x04, 0x00}, 842 // FIXME: faking offline 843 /* SRV/IDNF - ID not found */ 844 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 845 // Logical address out of range 846 /* MC - Media Changed */ 847 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 848 // Not ready to ready change, medium may have changed 849 /* ECC - Uncorrectable ECC error */ 850 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 851 // Unrecovered read error 852 /* BBD - block marked bad */ 853 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 854 // Block marked bad Medium error, unrecovered read error 855 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 856 }; 857 static const unsigned char stat_table[][4] = { 858 /* Must be first because BUSY means no other bits valid */ 859 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 860 // Busy, fake parity for now 861 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 862 // Device ready, unaligned write command 863 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 864 // Device fault, internal target failure 865 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 866 // Timed out in xfer, fake parity for now 867 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 868 // Recovered ECC error Medium error, recovered 869 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 870 }; 871 872 /* 873 * Is this an error we can process/parse 874 */ 875 if (drv_stat & ATA_BUSY) { 876 drv_err = 0; /* Ignore the err bits, they're invalid */ 877 } 878 879 if (drv_err) { 880 /* Look for drv_err */ 881 for (i = 0; sense_table[i][0] != 0xFF; i++) { 882 /* Look for best matches first */ 883 if ((sense_table[i][0] & drv_err) == 884 sense_table[i][0]) { 885 *sk = sense_table[i][1]; 886 *asc = sense_table[i][2]; 887 *ascq = sense_table[i][3]; 888 return; 889 } 890 } 891 } 892 893 /* 894 * Fall back to interpreting status bits. Note that if the drv_err 895 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 896 * is not descriptive enough. 897 */ 898 for (i = 0; stat_table[i][0] != 0xFF; i++) { 899 if (stat_table[i][0] & drv_stat) { 900 *sk = stat_table[i][1]; 901 *asc = stat_table[i][2]; 902 *ascq = stat_table[i][3]; 903 return; 904 } 905 } 906 907 /* 908 * We need a sensible error return here, which is tricky, and one 909 * that won't cause people to do things like return a disk wrongly. 910 */ 911 *sk = ABORTED_COMMAND; 912 *asc = 0x00; 913 *ascq = 0x00; 914 } 915 916 /* 917 * ata_gen_passthru_sense - Generate check condition sense block. 918 * @qc: Command that completed. 919 * 920 * This function is specific to the ATA pass through commands. 921 * Regardless of whether the command errored or not, return a sense 922 * block. If there was no error, we get the request from an ATA 923 * passthrough command, so we use the following sense data: 924 * sk = RECOVERED ERROR 925 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 926 * 927 * 928 * LOCKING: 929 * None. 930 */ 931 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 932 { 933 struct ata_device *dev = qc->dev; 934 struct scsi_cmnd *cmd = qc->scsicmd; 935 struct ata_taskfile *tf = &qc->result_tf; 936 u8 sense_key, asc, ascq; 937 938 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 939 ata_dev_dbg(dev, 940 "missing result TF: can't generate ATA PT sense data\n"); 941 return; 942 } 943 944 /* 945 * Use ata_to_sense_error() to map status register bits 946 * onto sense key, asc & ascq. 947 */ 948 if (qc->err_mask || 949 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 950 ata_to_sense_error(tf->status, tf->error, 951 &sense_key, &asc, &ascq); 952 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 953 } else { 954 /* 955 * ATA PASS-THROUGH INFORMATION AVAILABLE 956 * 957 * Note: we are supposed to call ata_scsi_set_sense(), which 958 * respects the D_SENSE bit, instead of unconditionally 959 * generating the sense data in descriptor format. However, 960 * because hdparm, hddtemp, and udisks incorrectly assume sense 961 * data in descriptor format, without even looking at the 962 * RESPONSE CODE field in the returned sense data (to see which 963 * format the returned sense data is in), we are stuck with 964 * being bug compatible with older kernels. 965 */ 966 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 967 } 968 } 969 970 /** 971 * ata_gen_ata_sense - generate a SCSI fixed sense block 972 * @qc: Command that we are erroring out 973 * 974 * Generate sense block for a failed ATA command @qc. Descriptor 975 * format is used to accommodate LBA48 block address. 976 * 977 * LOCKING: 978 * None. 979 */ 980 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 981 { 982 struct ata_device *dev = qc->dev; 983 struct scsi_cmnd *cmd = qc->scsicmd; 984 struct ata_taskfile *tf = &qc->result_tf; 985 unsigned char *sb = cmd->sense_buffer; 986 u64 block; 987 u8 sense_key, asc, ascq; 988 989 if (ata_dev_disabled(dev)) { 990 /* Device disabled after error recovery */ 991 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 992 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 993 return; 994 } 995 996 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 997 ata_dev_dbg(dev, 998 "missing result TF: can't generate sense data\n"); 999 return; 1000 } 1001 1002 /* Use ata_to_sense_error() to map status register bits 1003 * onto sense key, asc & ascq. 1004 */ 1005 if (qc->err_mask || 1006 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1007 ata_to_sense_error(tf->status, tf->error, 1008 &sense_key, &asc, &ascq); 1009 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1010 } else { 1011 /* Could not decode error */ 1012 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1013 tf->status, qc->err_mask); 1014 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1015 return; 1016 } 1017 1018 block = ata_tf_read_block(&qc->result_tf, dev); 1019 if (block == U64_MAX) 1020 return; 1021 1022 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1023 } 1024 1025 void ata_scsi_sdev_config(struct scsi_device *sdev) 1026 { 1027 sdev->use_10_for_rw = 1; 1028 sdev->use_10_for_ms = 1; 1029 sdev->no_write_same = 1; 1030 1031 /* Schedule policy is determined by ->qc_defer() callback and 1032 * it needs to see every deferred qc. Set dev_blocked to 1 to 1033 * prevent SCSI midlayer from automatically deferring 1034 * requests. 1035 */ 1036 sdev->max_device_blocked = 1; 1037 } 1038 1039 /** 1040 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1041 * @rq: request to be checked 1042 * 1043 * ATAPI commands which transfer variable length data to host 1044 * might overflow due to application error or hardware bug. This 1045 * function checks whether overflow should be drained and ignored 1046 * for @request. 1047 * 1048 * LOCKING: 1049 * None. 1050 * 1051 * RETURNS: 1052 * 1 if ; otherwise, 0. 1053 */ 1054 bool ata_scsi_dma_need_drain(struct request *rq) 1055 { 1056 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1057 1058 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1059 } 1060 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1061 1062 int ata_scsi_dev_config(struct scsi_device *sdev, struct queue_limits *lim, 1063 struct ata_device *dev) 1064 { 1065 int depth = 1; 1066 1067 if (!ata_id_has_unload(dev->id)) 1068 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1069 1070 /* configure max sectors */ 1071 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1072 lim->max_hw_sectors = dev->max_sectors; 1073 1074 if (dev->class == ATA_DEV_ATAPI) { 1075 sdev->sector_size = ATA_SECT_SIZE; 1076 1077 /* set DMA padding */ 1078 lim->dma_pad_mask = ATA_DMA_PAD_SZ - 1; 1079 1080 /* make room for appending the drain */ 1081 lim->max_segments--; 1082 1083 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1084 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1085 if (!sdev->dma_drain_buf) { 1086 ata_dev_err(dev, "drain buffer allocation failed\n"); 1087 return -ENOMEM; 1088 } 1089 } else { 1090 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1091 1092 /* 1093 * Ask the sd driver to issue START STOP UNIT on runtime suspend 1094 * and resume and shutdown only. For system level suspend/resume, 1095 * devices power state is handled directly by libata EH. 1096 * Given that disks are always spun up on system resume, also 1097 * make sure that the sd driver forces runtime suspended disks 1098 * to be resumed to correctly reflect the power state of the 1099 * device. 1100 */ 1101 sdev->manage_runtime_start_stop = 1; 1102 sdev->manage_shutdown = 1; 1103 sdev->force_runtime_start_on_system_start = 1; 1104 } 1105 1106 /* 1107 * ata_pio_sectors() expects buffer for each sector to not cross 1108 * page boundary. Enforce it by requiring buffers to be sector 1109 * aligned, which works iff sector_size is not larger than 1110 * PAGE_SIZE. ATAPI devices also need the alignment as 1111 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1112 */ 1113 if (sdev->sector_size > PAGE_SIZE) 1114 ata_dev_warn(dev, 1115 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1116 sdev->sector_size); 1117 1118 lim->dma_alignment = sdev->sector_size - 1; 1119 1120 if (dev->flags & ATA_DFLAG_AN) 1121 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1122 1123 if (ata_ncq_supported(dev)) 1124 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1125 depth = min(ATA_MAX_QUEUE, depth); 1126 scsi_change_queue_depth(sdev, depth); 1127 1128 if (dev->flags & ATA_DFLAG_TRUSTED) 1129 sdev->security_supported = 1; 1130 1131 dev->sdev = sdev; 1132 return 0; 1133 } 1134 1135 /** 1136 * ata_scsi_slave_alloc - Early setup of SCSI device 1137 * @sdev: SCSI device to examine 1138 * 1139 * This is called from scsi_alloc_sdev() when the scsi device 1140 * associated with an ATA device is scanned on a port. 1141 * 1142 * LOCKING: 1143 * Defined by SCSI layer. We don't really care. 1144 */ 1145 1146 int ata_scsi_slave_alloc(struct scsi_device *sdev) 1147 { 1148 struct ata_port *ap = ata_shost_to_port(sdev->host); 1149 struct device_link *link; 1150 1151 ata_scsi_sdev_config(sdev); 1152 1153 /* 1154 * Create a link from the ata_port device to the scsi device to ensure 1155 * that PM does suspend/resume in the correct order: the scsi device is 1156 * consumer (child) and the ata port the supplier (parent). 1157 */ 1158 link = device_link_add(&sdev->sdev_gendev, &ap->tdev, 1159 DL_FLAG_STATELESS | 1160 DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); 1161 if (!link) { 1162 ata_port_err(ap, "Failed to create link to scsi device %s\n", 1163 dev_name(&sdev->sdev_gendev)); 1164 return -ENODEV; 1165 } 1166 1167 return 0; 1168 } 1169 EXPORT_SYMBOL_GPL(ata_scsi_slave_alloc); 1170 1171 /** 1172 * ata_scsi_device_configure - Set SCSI device attributes 1173 * @sdev: SCSI device to examine 1174 * @lim: queue limits 1175 * 1176 * This is called before we actually start reading 1177 * and writing to the device, to configure certain 1178 * SCSI mid-layer behaviors. 1179 * 1180 * LOCKING: 1181 * Defined by SCSI layer. We don't really care. 1182 */ 1183 1184 int ata_scsi_device_configure(struct scsi_device *sdev, 1185 struct queue_limits *lim) 1186 { 1187 struct ata_port *ap = ata_shost_to_port(sdev->host); 1188 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1189 1190 if (dev) 1191 return ata_scsi_dev_config(sdev, lim, dev); 1192 1193 return 0; 1194 } 1195 EXPORT_SYMBOL_GPL(ata_scsi_device_configure); 1196 1197 /** 1198 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1199 * @sdev: SCSI device to be destroyed 1200 * 1201 * @sdev is about to be destroyed for hot/warm unplugging. If 1202 * this unplugging was initiated by libata as indicated by NULL 1203 * dev->sdev, this function doesn't have to do anything. 1204 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1205 * Clear dev->sdev, schedule the device for ATA detach and invoke 1206 * EH. 1207 * 1208 * LOCKING: 1209 * Defined by SCSI layer. We don't really care. 1210 */ 1211 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1212 { 1213 struct ata_port *ap = ata_shost_to_port(sdev->host); 1214 unsigned long flags; 1215 struct ata_device *dev; 1216 1217 device_link_remove(&sdev->sdev_gendev, &ap->tdev); 1218 1219 spin_lock_irqsave(ap->lock, flags); 1220 dev = __ata_scsi_find_dev(ap, sdev); 1221 if (dev && dev->sdev) { 1222 /* SCSI device already in CANCEL state, no need to offline it */ 1223 dev->sdev = NULL; 1224 dev->flags |= ATA_DFLAG_DETACH; 1225 ata_port_schedule_eh(ap); 1226 } 1227 spin_unlock_irqrestore(ap->lock, flags); 1228 1229 kfree(sdev->dma_drain_buf); 1230 } 1231 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1232 1233 /** 1234 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1235 * @qc: Storage for translated ATA taskfile 1236 * 1237 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1238 * (to start). Perhaps these commands should be preceded by 1239 * CHECK POWER MODE to see what power mode the device is already in. 1240 * [See SAT revision 5 at www.t10.org] 1241 * 1242 * LOCKING: 1243 * spin_lock_irqsave(host lock) 1244 * 1245 * RETURNS: 1246 * Zero on success, non-zero on error. 1247 */ 1248 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1249 { 1250 struct scsi_cmnd *scmd = qc->scsicmd; 1251 const u8 *cdb = scmd->cmnd; 1252 u16 fp; 1253 u8 bp = 0xff; 1254 1255 if (scmd->cmd_len < 5) { 1256 fp = 4; 1257 goto invalid_fld; 1258 } 1259 1260 /* LOEJ bit set not supported */ 1261 if (cdb[4] & 0x2) { 1262 fp = 4; 1263 bp = 1; 1264 goto invalid_fld; 1265 } 1266 1267 /* Power conditions not supported */ 1268 if (((cdb[4] >> 4) & 0xf) != 0) { 1269 fp = 4; 1270 bp = 3; 1271 goto invalid_fld; 1272 } 1273 1274 /* Ignore IMMED bit (cdb[1] & 0x1), violates sat-r05 */ 1275 if (!ata_dev_power_init_tf(qc->dev, &qc->tf, cdb[4] & 0x1)) { 1276 ata_scsi_set_sense(qc->dev, scmd, ABORTED_COMMAND, 0, 0); 1277 return 1; 1278 } 1279 1280 /* 1281 * Standby and Idle condition timers could be implemented but that 1282 * would require libata to implement the Power condition mode page 1283 * and allow the user to change it. Changing mode pages requires 1284 * MODE SELECT to be implemented. 1285 */ 1286 1287 return 0; 1288 1289 invalid_fld: 1290 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1291 return 1; 1292 } 1293 1294 /** 1295 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1296 * @qc: Storage for translated ATA taskfile 1297 * 1298 * Sets up an ATA taskfile to issue FLUSH CACHE or 1299 * FLUSH CACHE EXT. 1300 * 1301 * LOCKING: 1302 * spin_lock_irqsave(host lock) 1303 * 1304 * RETURNS: 1305 * Zero on success, non-zero on error. 1306 */ 1307 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1308 { 1309 struct ata_taskfile *tf = &qc->tf; 1310 1311 tf->flags |= ATA_TFLAG_DEVICE; 1312 tf->protocol = ATA_PROT_NODATA; 1313 1314 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1315 tf->command = ATA_CMD_FLUSH_EXT; 1316 else 1317 tf->command = ATA_CMD_FLUSH; 1318 1319 /* flush is critical for IO integrity, consider it an IO command */ 1320 qc->flags |= ATA_QCFLAG_IO; 1321 1322 return 0; 1323 } 1324 1325 /** 1326 * scsi_6_lba_len - Get LBA and transfer length 1327 * @cdb: SCSI command to translate 1328 * 1329 * Calculate LBA and transfer length for 6-byte commands. 1330 * 1331 * RETURNS: 1332 * @plba: the LBA 1333 * @plen: the transfer length 1334 */ 1335 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1336 { 1337 *plba = get_unaligned_be24(&cdb[1]) & 0x1fffff; 1338 *plen = cdb[4]; 1339 } 1340 1341 /** 1342 * scsi_10_lba_len - Get LBA and transfer length 1343 * @cdb: SCSI command to translate 1344 * 1345 * Calculate LBA and transfer length for 10-byte commands. 1346 * 1347 * RETURNS: 1348 * @plba: the LBA 1349 * @plen: the transfer length 1350 */ 1351 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1352 { 1353 *plba = get_unaligned_be32(&cdb[2]); 1354 *plen = get_unaligned_be16(&cdb[7]); 1355 } 1356 1357 /** 1358 * scsi_16_lba_len - Get LBA and transfer length 1359 * @cdb: SCSI command to translate 1360 * 1361 * Calculate LBA and transfer length for 16-byte commands. 1362 * 1363 * RETURNS: 1364 * @plba: the LBA 1365 * @plen: the transfer length 1366 */ 1367 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1368 { 1369 *plba = get_unaligned_be64(&cdb[2]); 1370 *plen = get_unaligned_be32(&cdb[10]); 1371 } 1372 1373 /** 1374 * scsi_dld - Get duration limit descriptor index 1375 * @cdb: SCSI command to translate 1376 * 1377 * Returns the dld bits indicating the index of a command duration limit 1378 * descriptor. 1379 */ 1380 static inline int scsi_dld(const u8 *cdb) 1381 { 1382 return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03); 1383 } 1384 1385 /** 1386 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1387 * @qc: Storage for translated ATA taskfile 1388 * 1389 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1390 * 1391 * LOCKING: 1392 * spin_lock_irqsave(host lock) 1393 * 1394 * RETURNS: 1395 * Zero on success, non-zero on error. 1396 */ 1397 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1398 { 1399 struct scsi_cmnd *scmd = qc->scsicmd; 1400 struct ata_taskfile *tf = &qc->tf; 1401 struct ata_device *dev = qc->dev; 1402 u64 dev_sectors = qc->dev->n_sectors; 1403 const u8 *cdb = scmd->cmnd; 1404 u64 block; 1405 u32 n_block; 1406 u16 fp; 1407 1408 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1409 tf->protocol = ATA_PROT_NODATA; 1410 1411 switch (cdb[0]) { 1412 case VERIFY: 1413 if (scmd->cmd_len < 10) { 1414 fp = 9; 1415 goto invalid_fld; 1416 } 1417 scsi_10_lba_len(cdb, &block, &n_block); 1418 break; 1419 case VERIFY_16: 1420 if (scmd->cmd_len < 16) { 1421 fp = 15; 1422 goto invalid_fld; 1423 } 1424 scsi_16_lba_len(cdb, &block, &n_block); 1425 break; 1426 default: 1427 fp = 0; 1428 goto invalid_fld; 1429 } 1430 1431 if (!n_block) 1432 goto nothing_to_do; 1433 if (block >= dev_sectors) 1434 goto out_of_range; 1435 if ((block + n_block) > dev_sectors) 1436 goto out_of_range; 1437 1438 if (dev->flags & ATA_DFLAG_LBA) { 1439 tf->flags |= ATA_TFLAG_LBA; 1440 1441 if (lba_28_ok(block, n_block)) { 1442 /* use LBA28 */ 1443 tf->command = ATA_CMD_VERIFY; 1444 tf->device |= (block >> 24) & 0xf; 1445 } else if (lba_48_ok(block, n_block)) { 1446 if (!(dev->flags & ATA_DFLAG_LBA48)) 1447 goto out_of_range; 1448 1449 /* use LBA48 */ 1450 tf->flags |= ATA_TFLAG_LBA48; 1451 tf->command = ATA_CMD_VERIFY_EXT; 1452 1453 tf->hob_nsect = (n_block >> 8) & 0xff; 1454 1455 tf->hob_lbah = (block >> 40) & 0xff; 1456 tf->hob_lbam = (block >> 32) & 0xff; 1457 tf->hob_lbal = (block >> 24) & 0xff; 1458 } else 1459 /* request too large even for LBA48 */ 1460 goto out_of_range; 1461 1462 tf->nsect = n_block & 0xff; 1463 1464 tf->lbah = (block >> 16) & 0xff; 1465 tf->lbam = (block >> 8) & 0xff; 1466 tf->lbal = block & 0xff; 1467 1468 tf->device |= ATA_LBA; 1469 } else { 1470 /* CHS */ 1471 u32 sect, head, cyl, track; 1472 1473 if (!lba_28_ok(block, n_block)) 1474 goto out_of_range; 1475 1476 /* Convert LBA to CHS */ 1477 track = (u32)block / dev->sectors; 1478 cyl = track / dev->heads; 1479 head = track % dev->heads; 1480 sect = (u32)block % dev->sectors + 1; 1481 1482 /* Check whether the converted CHS can fit. 1483 Cylinder: 0-65535 1484 Head: 0-15 1485 Sector: 1-255*/ 1486 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1487 goto out_of_range; 1488 1489 tf->command = ATA_CMD_VERIFY; 1490 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1491 tf->lbal = sect; 1492 tf->lbam = cyl; 1493 tf->lbah = cyl >> 8; 1494 tf->device |= head; 1495 } 1496 1497 return 0; 1498 1499 invalid_fld: 1500 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1501 return 1; 1502 1503 out_of_range: 1504 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1505 /* "Logical Block Address out of range" */ 1506 return 1; 1507 1508 nothing_to_do: 1509 scmd->result = SAM_STAT_GOOD; 1510 return 1; 1511 } 1512 1513 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1514 { 1515 struct request *rq = scsi_cmd_to_rq(scmd); 1516 u32 req_blocks; 1517 1518 if (!blk_rq_is_passthrough(rq)) 1519 return true; 1520 1521 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1522 if (n_blocks > req_blocks) 1523 return false; 1524 1525 return true; 1526 } 1527 1528 /** 1529 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1530 * @qc: Storage for translated ATA taskfile 1531 * 1532 * Converts any of six SCSI read/write commands into the 1533 * ATA counterpart, including starting sector (LBA), 1534 * sector count, and taking into account the device's LBA48 1535 * support. 1536 * 1537 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1538 * %WRITE_16 are currently supported. 1539 * 1540 * LOCKING: 1541 * spin_lock_irqsave(host lock) 1542 * 1543 * RETURNS: 1544 * Zero on success, non-zero on error. 1545 */ 1546 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1547 { 1548 struct scsi_cmnd *scmd = qc->scsicmd; 1549 const u8 *cdb = scmd->cmnd; 1550 struct request *rq = scsi_cmd_to_rq(scmd); 1551 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1552 unsigned int tf_flags = 0; 1553 int dld = 0; 1554 u64 block; 1555 u32 n_block; 1556 int rc; 1557 u16 fp = 0; 1558 1559 switch (cdb[0]) { 1560 case WRITE_6: 1561 case WRITE_10: 1562 case WRITE_16: 1563 tf_flags |= ATA_TFLAG_WRITE; 1564 break; 1565 } 1566 1567 /* Calculate the SCSI LBA, transfer length and FUA. */ 1568 switch (cdb[0]) { 1569 case READ_10: 1570 case WRITE_10: 1571 if (unlikely(scmd->cmd_len < 10)) { 1572 fp = 9; 1573 goto invalid_fld; 1574 } 1575 scsi_10_lba_len(cdb, &block, &n_block); 1576 if (cdb[1] & (1 << 3)) 1577 tf_flags |= ATA_TFLAG_FUA; 1578 if (!ata_check_nblocks(scmd, n_block)) 1579 goto invalid_fld; 1580 break; 1581 case READ_6: 1582 case WRITE_6: 1583 if (unlikely(scmd->cmd_len < 6)) { 1584 fp = 5; 1585 goto invalid_fld; 1586 } 1587 scsi_6_lba_len(cdb, &block, &n_block); 1588 1589 /* for 6-byte r/w commands, transfer length 0 1590 * means 256 blocks of data, not 0 block. 1591 */ 1592 if (!n_block) 1593 n_block = 256; 1594 if (!ata_check_nblocks(scmd, n_block)) 1595 goto invalid_fld; 1596 break; 1597 case READ_16: 1598 case WRITE_16: 1599 if (unlikely(scmd->cmd_len < 16)) { 1600 fp = 15; 1601 goto invalid_fld; 1602 } 1603 scsi_16_lba_len(cdb, &block, &n_block); 1604 dld = scsi_dld(cdb); 1605 if (cdb[1] & (1 << 3)) 1606 tf_flags |= ATA_TFLAG_FUA; 1607 if (!ata_check_nblocks(scmd, n_block)) 1608 goto invalid_fld; 1609 break; 1610 default: 1611 fp = 0; 1612 goto invalid_fld; 1613 } 1614 1615 /* Check and compose ATA command */ 1616 if (!n_block) 1617 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1618 * length 0 means transfer 0 block of data. 1619 * However, for ATA R/W commands, sector count 0 means 1620 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1621 * 1622 * WARNING: one or two older ATA drives treat 0 as 0... 1623 */ 1624 goto nothing_to_do; 1625 1626 qc->flags |= ATA_QCFLAG_IO; 1627 qc->nbytes = n_block * scmd->device->sector_size; 1628 1629 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class); 1630 if (likely(rc == 0)) 1631 return 0; 1632 1633 if (rc == -ERANGE) 1634 goto out_of_range; 1635 /* treat all other errors as -EINVAL, fall through */ 1636 invalid_fld: 1637 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1638 return 1; 1639 1640 out_of_range: 1641 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1642 /* "Logical Block Address out of range" */ 1643 return 1; 1644 1645 nothing_to_do: 1646 scmd->result = SAM_STAT_GOOD; 1647 return 1; 1648 } 1649 1650 static void ata_qc_done(struct ata_queued_cmd *qc) 1651 { 1652 struct scsi_cmnd *cmd = qc->scsicmd; 1653 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1654 1655 ata_qc_free(qc); 1656 done(cmd); 1657 } 1658 1659 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1660 { 1661 struct scsi_cmnd *cmd = qc->scsicmd; 1662 u8 *cdb = cmd->cmnd; 1663 bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID; 1664 bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12; 1665 bool is_ck_cond_request = cdb[2] & 0x20; 1666 bool is_error = qc->err_mask != 0; 1667 1668 /* For ATA pass thru (SAT) commands, generate a sense block if 1669 * user mandated it or if there's an error. Note that if we 1670 * generate because the user forced us to [CK_COND=1], a check 1671 * condition is generated and the ATA register values are returned 1672 * whether the command completed successfully or not. If there 1673 * was no error, and CK_COND=1, we use the following sense data: 1674 * sk = RECOVERED ERROR 1675 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1676 */ 1677 if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) { 1678 if (!have_sense) 1679 ata_gen_passthru_sense(qc); 1680 ata_scsi_set_passthru_sense_fields(qc); 1681 if (is_ck_cond_request) 1682 set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); 1683 } else if (is_error && !have_sense) { 1684 ata_gen_ata_sense(qc); 1685 } 1686 1687 ata_qc_done(qc); 1688 } 1689 1690 /** 1691 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1692 * @dev: ATA device to which the command is addressed 1693 * @cmd: SCSI command to execute 1694 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1695 * 1696 * Our ->queuecommand() function has decided that the SCSI 1697 * command issued can be directly translated into an ATA 1698 * command, rather than handled internally. 1699 * 1700 * This function sets up an ata_queued_cmd structure for the 1701 * SCSI command, and sends that ata_queued_cmd to the hardware. 1702 * 1703 * The xlat_func argument (actor) returns 0 if ready to execute 1704 * ATA command, else 1 to finish translation. If 1 is returned 1705 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1706 * to be set reflecting an error condition or clean (early) 1707 * termination. 1708 * 1709 * LOCKING: 1710 * spin_lock_irqsave(host lock) 1711 * 1712 * RETURNS: 1713 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1714 * needs to be deferred. 1715 */ 1716 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1717 ata_xlat_func_t xlat_func) 1718 { 1719 struct ata_port *ap = dev->link->ap; 1720 struct ata_queued_cmd *qc; 1721 int rc; 1722 1723 qc = ata_scsi_qc_new(dev, cmd); 1724 if (!qc) 1725 goto err_mem; 1726 1727 /* data is present; dma-map it */ 1728 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1729 cmd->sc_data_direction == DMA_TO_DEVICE) { 1730 if (unlikely(scsi_bufflen(cmd) < 1)) { 1731 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1732 goto err_did; 1733 } 1734 1735 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1736 1737 qc->dma_dir = cmd->sc_data_direction; 1738 } 1739 1740 qc->complete_fn = ata_scsi_qc_complete; 1741 1742 if (xlat_func(qc)) 1743 goto early_finish; 1744 1745 if (ap->ops->qc_defer) { 1746 if ((rc = ap->ops->qc_defer(qc))) 1747 goto defer; 1748 } 1749 1750 /* select device, send command to hardware */ 1751 ata_qc_issue(qc); 1752 1753 return 0; 1754 1755 early_finish: 1756 ata_qc_free(qc); 1757 scsi_done(cmd); 1758 return 0; 1759 1760 err_did: 1761 ata_qc_free(qc); 1762 cmd->result = (DID_ERROR << 16); 1763 scsi_done(cmd); 1764 err_mem: 1765 return 0; 1766 1767 defer: 1768 ata_qc_free(qc); 1769 if (rc == ATA_DEFER_LINK) 1770 return SCSI_MLQUEUE_DEVICE_BUSY; 1771 else 1772 return SCSI_MLQUEUE_HOST_BUSY; 1773 } 1774 1775 /** 1776 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1777 * @dev: Target device. 1778 * @cmd: SCSI command of interest. 1779 * @actor: Callback hook for desired SCSI command simulator 1780 * 1781 * Takes care of the hard work of simulating a SCSI command... 1782 * Mapping the response buffer, calling the command's handler, 1783 * and handling the handler's return value. This return value 1784 * indicates whether the handler wishes the SCSI command to be 1785 * completed successfully (0), or not (in which case cmd->result 1786 * and sense buffer are assumed to be set). 1787 * 1788 * LOCKING: 1789 * spin_lock_irqsave(host lock) 1790 */ 1791 static void ata_scsi_rbuf_fill(struct ata_device *dev, struct scsi_cmnd *cmd, 1792 unsigned int (*actor)(struct ata_device *dev, 1793 struct scsi_cmnd *cmd, u8 *rbuf)) 1794 { 1795 unsigned long flags; 1796 unsigned int len; 1797 1798 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1799 1800 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1801 len = actor(dev, cmd, ata_scsi_rbuf); 1802 if (len) { 1803 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1804 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1805 cmd->result = SAM_STAT_GOOD; 1806 if (scsi_bufflen(cmd) > len) 1807 scsi_set_resid(cmd, scsi_bufflen(cmd) - len); 1808 } 1809 1810 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1811 } 1812 1813 /** 1814 * ata_scsiop_inq_std - Simulate standard INQUIRY command 1815 * @dev: Target device. 1816 * @cmd: SCSI command of interest. 1817 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1818 * 1819 * Returns standard device identification data associated 1820 * with non-VPD INQUIRY command output. 1821 * 1822 * LOCKING: 1823 * spin_lock_irqsave(host lock) 1824 */ 1825 static unsigned int ata_scsiop_inq_std(struct ata_device *dev, 1826 struct scsi_cmnd *cmd, u8 *rbuf) 1827 { 1828 static const u8 versions[] = { 1829 0x00, 1830 0x60, /* SAM-3 (no version claimed) */ 1831 1832 0x03, 1833 0x20, /* SBC-2 (no version claimed) */ 1834 1835 0x03, 1836 0x00 /* SPC-3 (no version claimed) */ 1837 }; 1838 static const u8 versions_zbc[] = { 1839 0x00, 1840 0xA0, /* SAM-5 (no version claimed) */ 1841 1842 0x06, 1843 0x00, /* SBC-4 (no version claimed) */ 1844 1845 0x05, 1846 0xC0, /* SPC-5 (no version claimed) */ 1847 1848 0x60, 1849 0x24, /* ZBC r05 */ 1850 }; 1851 1852 u8 hdr[] = { 1853 TYPE_DISK, 1854 0, 1855 0x5, /* claim SPC-3 version compatibility */ 1856 2, 1857 95 - 4, 1858 0, 1859 0, 1860 2 1861 }; 1862 1863 /* 1864 * Set the SCSI Removable Media Bit (RMB) if the ATA removable media 1865 * device bit (obsolete since ATA-8 ACS) is set. 1866 */ 1867 if (ata_id_removable(dev->id)) 1868 hdr[1] |= (1 << 7); 1869 1870 if (dev->class == ATA_DEV_ZAC) { 1871 hdr[0] = TYPE_ZBC; 1872 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1873 } 1874 1875 if (dev->flags & ATA_DFLAG_CDL) 1876 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 1877 1878 memcpy(rbuf, hdr, sizeof(hdr)); 1879 memcpy(&rbuf[8], "ATA ", 8); 1880 ata_id_string(dev->id, &rbuf[16], ATA_ID_PROD, 16); 1881 1882 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1883 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1884 if (strncmp(&rbuf[32], " ", 4) == 0) 1885 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV, 4); 1886 1887 if (rbuf[32] == 0 || rbuf[32] == ' ') 1888 memcpy(&rbuf[32], "n/a ", 4); 1889 1890 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 1891 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1892 else 1893 memcpy(rbuf + 58, versions, sizeof(versions)); 1894 1895 /* 1896 * Include all 8 possible version descriptors, even if not all of 1897 * them are popoulated. 1898 */ 1899 return 96; 1900 } 1901 1902 /** 1903 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1904 * @dev: Target device. 1905 * @cmd: SCSI command of interest. 1906 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1907 * 1908 * Returns list of inquiry VPD pages available. 1909 * 1910 * LOCKING: 1911 * spin_lock_irqsave(host lock) 1912 */ 1913 static unsigned int ata_scsiop_inq_00(struct ata_device *dev, 1914 struct scsi_cmnd *cmd, u8 *rbuf) 1915 { 1916 int i, num_pages = 0; 1917 static const u8 pages[] = { 1918 0x00, /* page 0x00, this page */ 1919 0x80, /* page 0x80, unit serial no page */ 1920 0x83, /* page 0x83, device ident page */ 1921 0x89, /* page 0x89, ata info page */ 1922 0xb0, /* page 0xb0, block limits page */ 1923 0xb1, /* page 0xb1, block device characteristics page */ 1924 0xb2, /* page 0xb2, thin provisioning page */ 1925 0xb6, /* page 0xb6, zoned block device characteristics */ 1926 0xb9, /* page 0xb9, concurrent positioning ranges */ 1927 }; 1928 1929 for (i = 0; i < sizeof(pages); i++) { 1930 if (pages[i] == 0xb6 && 1931 !(dev->flags & ATA_DFLAG_ZAC)) 1932 continue; 1933 rbuf[num_pages + 4] = pages[i]; 1934 num_pages++; 1935 } 1936 rbuf[3] = num_pages; /* number of supported VPD pages */ 1937 1938 return get_unaligned_be16(&rbuf[2]) + 4; 1939 } 1940 1941 /** 1942 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1943 * @dev: Target device. 1944 * @cmd: SCSI command of interest. 1945 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1946 * 1947 * Returns ATA device serial number. 1948 * 1949 * LOCKING: 1950 * spin_lock_irqsave(host lock) 1951 */ 1952 static unsigned int ata_scsiop_inq_80(struct ata_device *dev, 1953 struct scsi_cmnd *cmd, u8 *rbuf) 1954 { 1955 static const u8 hdr[] = { 1956 0, 1957 0x80, /* this page code */ 1958 0, 1959 ATA_ID_SERNO_LEN, /* page len */ 1960 }; 1961 1962 memcpy(rbuf, hdr, sizeof(hdr)); 1963 ata_id_string(dev->id, (unsigned char *) &rbuf[4], 1964 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1965 1966 return get_unaligned_be16(&rbuf[2]) + 4; 1967 } 1968 1969 /** 1970 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1971 * @dev: Target device. 1972 * @cmd: SCSI command of interest. 1973 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1974 * 1975 * Yields two logical unit device identification designators: 1976 * - vendor specific ASCII containing the ATA serial number 1977 * - SAT defined "t10 vendor id based" containing ASCII vendor 1978 * name ("ATA "), model and serial numbers. 1979 * 1980 * LOCKING: 1981 * spin_lock_irqsave(host lock) 1982 */ 1983 static unsigned int ata_scsiop_inq_83(struct ata_device *dev, 1984 struct scsi_cmnd *cmd, u8 *rbuf) 1985 { 1986 const int sat_model_serial_desc_len = 68; 1987 int num; 1988 1989 rbuf[1] = 0x83; /* this page code */ 1990 num = 4; 1991 1992 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1993 rbuf[num + 0] = 2; 1994 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1995 num += 4; 1996 ata_id_string(dev->id, (unsigned char *) rbuf + num, 1997 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1998 num += ATA_ID_SERNO_LEN; 1999 2000 /* SAT defined lu model and serial numbers descriptor */ 2001 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2002 rbuf[num + 0] = 2; 2003 rbuf[num + 1] = 1; 2004 rbuf[num + 3] = sat_model_serial_desc_len; 2005 num += 4; 2006 memcpy(rbuf + num, "ATA ", 8); 2007 num += 8; 2008 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2009 ATA_ID_PROD_LEN); 2010 num += ATA_ID_PROD_LEN; 2011 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2012 ATA_ID_SERNO_LEN); 2013 num += ATA_ID_SERNO_LEN; 2014 2015 if (ata_id_has_wwn(dev->id)) { 2016 /* SAT defined lu world wide name */ 2017 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2018 rbuf[num + 0] = 1; 2019 rbuf[num + 1] = 3; 2020 rbuf[num + 3] = ATA_ID_WWN_LEN; 2021 num += 4; 2022 ata_id_string(dev->id, (unsigned char *) rbuf + num, 2023 ATA_ID_WWN, ATA_ID_WWN_LEN); 2024 num += ATA_ID_WWN_LEN; 2025 } 2026 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2027 2028 return get_unaligned_be16(&rbuf[2]) + 4; 2029 } 2030 2031 /** 2032 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2033 * @dev: Target device. 2034 * @cmd: SCSI command of interest. 2035 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2036 * 2037 * Yields SAT-specified ATA VPD page. 2038 * 2039 * LOCKING: 2040 * spin_lock_irqsave(host lock) 2041 */ 2042 static unsigned int ata_scsiop_inq_89(struct ata_device *dev, 2043 struct scsi_cmnd *cmd, u8 *rbuf) 2044 { 2045 rbuf[1] = 0x89; /* our page code */ 2046 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2047 rbuf[3] = (0x238 & 0xff); 2048 2049 memcpy(&rbuf[8], "linux ", 8); 2050 memcpy(&rbuf[16], "libata ", 16); 2051 memcpy(&rbuf[32], DRV_VERSION, 4); 2052 2053 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2054 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2055 /* TODO: PMP? */ 2056 2057 /* we don't store the ATA device signature, so we fake it */ 2058 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2059 rbuf[40] = 0x1; 2060 rbuf[48] = 0x1; 2061 2062 rbuf[56] = ATA_CMD_ID_ATA; 2063 2064 memcpy(&rbuf[60], &dev->id[0], 512); 2065 2066 return get_unaligned_be16(&rbuf[2]) + 4; 2067 } 2068 2069 /** 2070 * ata_scsiop_inq_b0 - Simulate INQUIRY VPD page B0, Block Limits 2071 * @dev: Target device. 2072 * @cmd: SCSI command of interest. 2073 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2074 * 2075 * Return data for the VPD page B0h (Block Limits). 2076 * 2077 * LOCKING: 2078 * spin_lock_irqsave(host lock) 2079 */ 2080 static unsigned int ata_scsiop_inq_b0(struct ata_device *dev, 2081 struct scsi_cmnd *cmd, u8 *rbuf) 2082 { 2083 u16 min_io_sectors; 2084 2085 rbuf[1] = 0xb0; 2086 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2087 2088 /* 2089 * Optimal transfer length granularity. 2090 * 2091 * This is always one physical block, but for disks with a smaller 2092 * logical than physical sector size we need to figure out what the 2093 * latter is. 2094 */ 2095 min_io_sectors = 1 << ata_id_log2_per_physical_sector(dev->id); 2096 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2097 2098 /* 2099 * Optimal unmap granularity. 2100 * 2101 * The ATA spec doesn't even know about a granularity or alignment 2102 * for the TRIM command. We can leave away most of the unmap related 2103 * VPD page entries, but we have specifify a granularity to signal 2104 * that we support some form of unmap - in thise case via WRITE SAME 2105 * with the unmap bit set. 2106 */ 2107 if (ata_id_has_trim(dev->id)) { 2108 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2109 2110 if (dev->quirks & ATA_QUIRK_MAX_TRIM_128M) 2111 max_blocks = 128 << (20 - SECTOR_SHIFT); 2112 2113 put_unaligned_be64(max_blocks, &rbuf[36]); 2114 put_unaligned_be32(1, &rbuf[28]); 2115 } 2116 2117 return get_unaligned_be16(&rbuf[2]) + 4; 2118 } 2119 2120 /** 2121 * ata_scsiop_inq_b1 - Simulate INQUIRY VPD page B1, Block Device 2122 * Characteristics 2123 * @dev: Target device. 2124 * @cmd: SCSI command of interest. 2125 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2126 * 2127 * Return data for the VPD page B1h (Block Device Characteristics). 2128 * 2129 * LOCKING: 2130 * spin_lock_irqsave(host lock) 2131 */ 2132 static unsigned int ata_scsiop_inq_b1(struct ata_device *dev, 2133 struct scsi_cmnd *cmd, u8 *rbuf) 2134 { 2135 int form_factor = ata_id_form_factor(dev->id); 2136 int media_rotation_rate = ata_id_rotation_rate(dev->id); 2137 u8 zoned = ata_id_zoned_cap(dev->id); 2138 2139 rbuf[1] = 0xb1; 2140 rbuf[3] = 0x3c; 2141 rbuf[4] = media_rotation_rate >> 8; 2142 rbuf[5] = media_rotation_rate; 2143 rbuf[7] = form_factor; 2144 if (zoned) 2145 rbuf[8] = (zoned << 4); 2146 2147 return get_unaligned_be16(&rbuf[2]) + 4; 2148 } 2149 2150 /** 2151 * ata_scsiop_inq_b2 - Simulate INQUIRY VPD page B2, Logical Block 2152 * Provisioning 2153 * @dev: Target device. 2154 * @cmd: SCSI command of interest. 2155 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2156 * 2157 * Return data for the VPD page B2h (Logical Block Provisioning). 2158 * 2159 * LOCKING: 2160 * spin_lock_irqsave(host lock) 2161 */ 2162 static unsigned int ata_scsiop_inq_b2(struct ata_device *dev, 2163 struct scsi_cmnd *cmd, u8 *rbuf) 2164 { 2165 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2166 rbuf[1] = 0xb2; 2167 rbuf[3] = 0x4; 2168 rbuf[5] = 1 << 6; /* TPWS */ 2169 2170 return get_unaligned_be16(&rbuf[2]) + 4; 2171 } 2172 2173 /** 2174 * ata_scsiop_inq_b6 - Simulate INQUIRY VPD page B6, Zoned Block Device 2175 * Characteristics 2176 * @dev: Target device. 2177 * @cmd: SCSI command of interest. 2178 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2179 * 2180 * Return data for the VPD page B2h (Zoned Block Device Characteristics). 2181 * 2182 * LOCKING: 2183 * spin_lock_irqsave(host lock) 2184 */ 2185 static unsigned int ata_scsiop_inq_b6(struct ata_device *dev, 2186 struct scsi_cmnd *cmd, u8 *rbuf) 2187 { 2188 if (!(dev->flags & ATA_DFLAG_ZAC)) { 2189 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2190 return 0; 2191 } 2192 2193 /* 2194 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2195 */ 2196 rbuf[1] = 0xb6; 2197 rbuf[3] = 0x3C; 2198 2199 /* 2200 * URSWRZ bit is only meaningful for host-managed ZAC drives 2201 */ 2202 if (dev->zac_zoned_cap & 1) 2203 rbuf[4] |= 1; 2204 put_unaligned_be32(dev->zac_zones_optimal_open, &rbuf[8]); 2205 put_unaligned_be32(dev->zac_zones_optimal_nonseq, &rbuf[12]); 2206 put_unaligned_be32(dev->zac_zones_max_open, &rbuf[16]); 2207 2208 return get_unaligned_be16(&rbuf[2]) + 4; 2209 } 2210 2211 /** 2212 * ata_scsiop_inq_b9 - Simulate INQUIRY VPD page B9, Concurrent Positioning 2213 * Ranges 2214 * @dev: Target device. 2215 * @cmd: SCSI command of interest. 2216 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2217 * 2218 * Return data for the VPD page B9h (Concurrent Positioning Ranges). 2219 * 2220 * LOCKING: 2221 * spin_lock_irqsave(host lock) 2222 */ 2223 static unsigned int ata_scsiop_inq_b9(struct ata_device *dev, 2224 struct scsi_cmnd *cmd, u8 *rbuf) 2225 { 2226 struct ata_cpr_log *cpr_log = dev->cpr_log; 2227 u8 *desc = &rbuf[64]; 2228 int i; 2229 2230 if (!cpr_log) { 2231 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2232 return 0; 2233 } 2234 2235 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2236 rbuf[1] = 0xb9; 2237 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2238 2239 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2240 desc[0] = cpr_log->cpr[i].num; 2241 desc[1] = cpr_log->cpr[i].num_storage_elements; 2242 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2243 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2244 } 2245 2246 return get_unaligned_be16(&rbuf[2]) + 4; 2247 } 2248 2249 /** 2250 * ata_scsiop_inquiry - Simulate INQUIRY command 2251 * @dev: Target device. 2252 * @cmd: SCSI command of interest. 2253 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2254 * 2255 * Returns data associated with an INQUIRY command output. 2256 * 2257 * LOCKING: 2258 * spin_lock_irqsave(host lock) 2259 */ 2260 static unsigned int ata_scsiop_inquiry(struct ata_device *dev, 2261 struct scsi_cmnd *cmd, u8 *rbuf) 2262 { 2263 const u8 *scsicmd = cmd->cmnd; 2264 2265 /* is CmdDt set? */ 2266 if (scsicmd[1] & 2) { 2267 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2268 return 0; 2269 } 2270 2271 /* Is EVPD clear? */ 2272 if ((scsicmd[1] & 1) == 0) 2273 return ata_scsiop_inq_std(dev, cmd, rbuf); 2274 2275 switch (scsicmd[2]) { 2276 case 0x00: 2277 return ata_scsiop_inq_00(dev, cmd, rbuf); 2278 case 0x80: 2279 return ata_scsiop_inq_80(dev, cmd, rbuf); 2280 case 0x83: 2281 return ata_scsiop_inq_83(dev, cmd, rbuf); 2282 case 0x89: 2283 return ata_scsiop_inq_89(dev, cmd, rbuf); 2284 case 0xb0: 2285 return ata_scsiop_inq_b0(dev, cmd, rbuf); 2286 case 0xb1: 2287 return ata_scsiop_inq_b1(dev, cmd, rbuf); 2288 case 0xb2: 2289 return ata_scsiop_inq_b2(dev, cmd, rbuf); 2290 case 0xb6: 2291 return ata_scsiop_inq_b6(dev, cmd, rbuf); 2292 case 0xb9: 2293 return ata_scsiop_inq_b9(dev, cmd, rbuf); 2294 default: 2295 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2296 return 0; 2297 } 2298 } 2299 2300 /** 2301 * modecpy - Prepare response for MODE SENSE 2302 * @dest: output buffer 2303 * @src: data being copied 2304 * @n: length of mode page 2305 * @changeable: whether changeable parameters are requested 2306 * 2307 * Generate a generic MODE SENSE page for either current or changeable 2308 * parameters. 2309 * 2310 * LOCKING: 2311 * None. 2312 */ 2313 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2314 { 2315 if (changeable) { 2316 memcpy(dest, src, 2); 2317 memset(dest + 2, 0, n - 2); 2318 } else { 2319 memcpy(dest, src, n); 2320 } 2321 } 2322 2323 /** 2324 * ata_msense_caching - Simulate MODE SENSE caching info page 2325 * @id: device IDENTIFY data 2326 * @buf: output buffer 2327 * @changeable: whether changeable parameters are requested 2328 * 2329 * Generate a caching info page, which conditionally indicates 2330 * write caching to the SCSI layer, depending on device 2331 * capabilities. 2332 * 2333 * LOCKING: 2334 * None. 2335 */ 2336 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2337 { 2338 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2339 if (changeable) { 2340 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2341 } else { 2342 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2343 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2344 } 2345 return sizeof(def_cache_mpage); 2346 } 2347 2348 /* 2349 * Simulate MODE SENSE control mode page, sub-page 0. 2350 */ 2351 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2352 bool changeable) 2353 { 2354 modecpy(buf, def_control_mpage, 2355 sizeof(def_control_mpage), changeable); 2356 if (changeable) { 2357 /* ata_mselect_control() */ 2358 buf[2] |= (1 << 2); 2359 } else { 2360 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2361 2362 /* descriptor format sense data */ 2363 buf[2] |= (d_sense << 2); 2364 } 2365 2366 return sizeof(def_control_mpage); 2367 } 2368 2369 /* 2370 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2371 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2372 * only, take care of overflows. 2373 */ 2374 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2375 { 2376 u32 limit = get_unaligned_le32(buf); 2377 2378 return min_t(u32, limit / 10000, 65535); 2379 } 2380 2381 /* 2382 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2383 * (command duration limits T2A and T2B mode pages). 2384 */ 2385 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2386 u8 spg) 2387 { 2388 u8 *b, *cdl, *desc; 2389 u32 policy; 2390 int i; 2391 2392 if (!(dev->flags & ATA_DFLAG_CDL) || !dev->cdl) 2393 return 0; 2394 2395 cdl = dev->cdl->desc_log_buf; 2396 2397 /* 2398 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2399 * are a header. The PAGE LENGTH field is the size of the page 2400 * excluding the header. 2401 */ 2402 buf[0] = CONTROL_MPAGE; 2403 buf[1] = spg; 2404 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2405 if (spg == CDL_T2A_SUB_MPAGE) { 2406 /* 2407 * Read descriptors map to the T2A page: 2408 * set perf_vs_duration_guidleine. 2409 */ 2410 buf[7] = (cdl[0] & 0x03) << 4; 2411 desc = cdl + 64; 2412 } else { 2413 /* Write descriptors map to the T2B page */ 2414 desc = cdl + 288; 2415 } 2416 2417 /* Fill the T2 page descriptors */ 2418 b = &buf[8]; 2419 policy = get_unaligned_le32(&cdl[0]); 2420 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2421 /* t2cdlunits: fixed to 10ms */ 2422 b[0] = 0x0a; 2423 2424 /* Max inactive time and its policy */ 2425 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2426 b[6] = ((policy >> 8) & 0x0f) << 4; 2427 2428 /* Max active time and its policy */ 2429 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2430 b[6] |= (policy >> 4) & 0x0f; 2431 2432 /* Command duration guideline and its policy */ 2433 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2434 b[14] = policy & 0x0f; 2435 } 2436 2437 return CDL_T2_SUB_MPAGE_LEN; 2438 } 2439 2440 /* 2441 * Simulate MODE SENSE control mode page, sub-page f2h 2442 * (ATA feature control mode page). 2443 */ 2444 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2445 u8 *buf) 2446 { 2447 /* PS=0, SPF=1 */ 2448 buf[0] = CONTROL_MPAGE | (1 << 6); 2449 buf[1] = ATA_FEATURE_SUB_MPAGE; 2450 2451 /* 2452 * The first four bytes of ATA Feature Control mode page are a header. 2453 * The PAGE LENGTH field is the size of the page excluding the header. 2454 */ 2455 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2456 2457 if (dev->flags & ATA_DFLAG_CDL) 2458 buf[4] = 0x02; /* Support T2A and T2B pages */ 2459 else 2460 buf[4] = 0; 2461 2462 return ATA_FEATURE_SUB_MPAGE_LEN; 2463 } 2464 2465 /** 2466 * ata_msense_control - Simulate MODE SENSE control mode page 2467 * @dev: ATA device of interest 2468 * @buf: output buffer 2469 * @spg: sub-page code 2470 * @changeable: whether changeable parameters are requested 2471 * 2472 * Generate a generic MODE SENSE control mode page. 2473 * 2474 * LOCKING: 2475 * None. 2476 */ 2477 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2478 u8 spg, bool changeable) 2479 { 2480 unsigned int n; 2481 2482 switch (spg) { 2483 case 0: 2484 return ata_msense_control_spg0(dev, buf, changeable); 2485 case CDL_T2A_SUB_MPAGE: 2486 case CDL_T2B_SUB_MPAGE: 2487 return ata_msense_control_spgt2(dev, buf, spg); 2488 case ATA_FEATURE_SUB_MPAGE: 2489 return ata_msense_control_ata_feature(dev, buf); 2490 case ALL_SUB_MPAGES: 2491 n = ata_msense_control_spg0(dev, buf, changeable); 2492 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2493 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2B_SUB_MPAGE); 2494 n += ata_msense_control_ata_feature(dev, buf + n); 2495 return n; 2496 default: 2497 return 0; 2498 } 2499 } 2500 2501 /** 2502 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2503 * @buf: output buffer 2504 * @changeable: whether changeable parameters are requested 2505 * 2506 * Generate a generic MODE SENSE r/w error recovery page. 2507 * 2508 * LOCKING: 2509 * None. 2510 */ 2511 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2512 { 2513 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2514 changeable); 2515 return sizeof(def_rw_recovery_mpage); 2516 } 2517 2518 /** 2519 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2520 * @dev: Target device. 2521 * @cmd: SCSI command of interest. 2522 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2523 * 2524 * Simulate MODE SENSE commands. Assume this is invoked for direct 2525 * access devices (e.g. disks) only. There should be no block 2526 * descriptor for other device types. 2527 * 2528 * LOCKING: 2529 * spin_lock_irqsave(host lock) 2530 */ 2531 static unsigned int ata_scsiop_mode_sense(struct ata_device *dev, 2532 struct scsi_cmnd *cmd, u8 *rbuf) 2533 { 2534 u8 *scsicmd = cmd->cmnd, *p = rbuf; 2535 static const u8 sat_blk_desc[] = { 2536 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2537 0, 2538 0, 0x2, 0x0 /* block length: 512 bytes */ 2539 }; 2540 u8 pg, spg; 2541 unsigned int ebd, page_control, six_byte; 2542 u8 dpofua = 0, bp = 0xff; 2543 u16 fp; 2544 2545 six_byte = (scsicmd[0] == MODE_SENSE); 2546 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2547 /* 2548 * LLBA bit in msense(10) ignored (compliant) 2549 */ 2550 2551 page_control = scsicmd[2] >> 6; 2552 switch (page_control) { 2553 case 0: /* current */ 2554 case 1: /* changeable */ 2555 case 2: /* defaults */ 2556 break; /* supported */ 2557 case 3: /* saved */ 2558 goto saving_not_supp; 2559 default: 2560 fp = 2; 2561 bp = 6; 2562 goto invalid_fld; 2563 } 2564 2565 if (six_byte) 2566 p += 4 + (ebd ? 8 : 0); 2567 else 2568 p += 8 + (ebd ? 8 : 0); 2569 2570 pg = scsicmd[2] & 0x3f; 2571 spg = scsicmd[3]; 2572 2573 /* 2574 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2575 * the control page. 2576 */ 2577 if (spg) { 2578 switch (spg) { 2579 case ALL_SUB_MPAGES: 2580 break; 2581 case CDL_T2A_SUB_MPAGE: 2582 case CDL_T2B_SUB_MPAGE: 2583 case ATA_FEATURE_SUB_MPAGE: 2584 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2585 break; 2586 fallthrough; 2587 default: 2588 fp = 3; 2589 goto invalid_fld; 2590 } 2591 } 2592 2593 switch(pg) { 2594 case RW_RECOVERY_MPAGE: 2595 p += ata_msense_rw_recovery(p, page_control == 1); 2596 break; 2597 2598 case CACHE_MPAGE: 2599 p += ata_msense_caching(dev->id, p, page_control == 1); 2600 break; 2601 2602 case CONTROL_MPAGE: 2603 p += ata_msense_control(dev, p, spg, page_control == 1); 2604 break; 2605 2606 case ALL_MPAGES: 2607 p += ata_msense_rw_recovery(p, page_control == 1); 2608 p += ata_msense_caching(dev->id, p, page_control == 1); 2609 p += ata_msense_control(dev, p, spg, page_control == 1); 2610 break; 2611 2612 default: /* invalid page code */ 2613 fp = 2; 2614 goto invalid_fld; 2615 } 2616 2617 if (dev->flags & ATA_DFLAG_FUA) 2618 dpofua = 1 << 4; 2619 2620 if (six_byte) { 2621 rbuf[0] = p - rbuf - 1; 2622 rbuf[2] |= dpofua; 2623 if (ebd) { 2624 rbuf[3] = sizeof(sat_blk_desc); 2625 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2626 } 2627 2628 return rbuf[0] + 1; 2629 } 2630 2631 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2632 rbuf[3] |= dpofua; 2633 if (ebd) { 2634 rbuf[7] = sizeof(sat_blk_desc); 2635 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2636 } 2637 2638 return get_unaligned_be16(&rbuf[0]) + 2; 2639 2640 invalid_fld: 2641 ata_scsi_set_invalid_field(dev, cmd, fp, bp); 2642 return 0; 2643 2644 saving_not_supp: 2645 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2646 /* "Saving parameters not supported" */ 2647 return 0; 2648 } 2649 2650 /** 2651 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2652 * @dev: Target device. 2653 * @cmd: SCSI command of interest. 2654 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2655 * 2656 * Simulate READ CAPACITY commands. 2657 * 2658 * LOCKING: 2659 * None. 2660 */ 2661 static unsigned int ata_scsiop_read_cap(struct ata_device *dev, 2662 struct scsi_cmnd *cmd, u8 *rbuf) 2663 { 2664 u8 *scsicmd = cmd->cmnd; 2665 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2666 u32 sector_size; /* physical sector size in bytes */ 2667 u8 log2_per_phys; 2668 u16 lowest_aligned; 2669 2670 sector_size = ata_id_logical_sector_size(dev->id); 2671 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2672 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2673 2674 if (scsicmd[0] == READ_CAPACITY) { 2675 if (last_lba >= 0xffffffffULL) 2676 last_lba = 0xffffffff; 2677 2678 /* sector count, 32-bit */ 2679 rbuf[0] = last_lba >> (8 * 3); 2680 rbuf[1] = last_lba >> (8 * 2); 2681 rbuf[2] = last_lba >> (8 * 1); 2682 rbuf[3] = last_lba; 2683 2684 /* sector size */ 2685 rbuf[4] = sector_size >> (8 * 3); 2686 rbuf[5] = sector_size >> (8 * 2); 2687 rbuf[6] = sector_size >> (8 * 1); 2688 rbuf[7] = sector_size; 2689 2690 return 8; 2691 } 2692 2693 /* 2694 * READ CAPACITY 16 command is defined as a service action 2695 * (SERVICE_ACTION_IN_16 command). 2696 */ 2697 if (scsicmd[0] != SERVICE_ACTION_IN_16 || 2698 (scsicmd[1] & 0x1f) != SAI_READ_CAPACITY_16) { 2699 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2700 return 0; 2701 } 2702 2703 /* sector count, 64-bit */ 2704 rbuf[0] = last_lba >> (8 * 7); 2705 rbuf[1] = last_lba >> (8 * 6); 2706 rbuf[2] = last_lba >> (8 * 5); 2707 rbuf[3] = last_lba >> (8 * 4); 2708 rbuf[4] = last_lba >> (8 * 3); 2709 rbuf[5] = last_lba >> (8 * 2); 2710 rbuf[6] = last_lba >> (8 * 1); 2711 rbuf[7] = last_lba; 2712 2713 /* sector size */ 2714 rbuf[ 8] = sector_size >> (8 * 3); 2715 rbuf[ 9] = sector_size >> (8 * 2); 2716 rbuf[10] = sector_size >> (8 * 1); 2717 rbuf[11] = sector_size; 2718 2719 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 2720 rbuf[12] = (1 << 4); /* RC_BASIS */ 2721 rbuf[13] = log2_per_phys; 2722 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2723 rbuf[15] = lowest_aligned; 2724 2725 if (ata_id_has_trim(dev->id) && !(dev->quirks & ATA_QUIRK_NOTRIM)) { 2726 rbuf[14] |= 0x80; /* LBPME */ 2727 2728 if (ata_id_has_zero_after_trim(dev->id) && 2729 dev->quirks & ATA_QUIRK_ZERO_AFTER_TRIM) { 2730 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2731 rbuf[14] |= 0x40; /* LBPRZ */ 2732 } 2733 } 2734 2735 return 16; 2736 } 2737 2738 /** 2739 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2740 * @dev: Target device. 2741 * @cmd: SCSI command of interest. 2742 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2743 * 2744 * Simulate REPORT LUNS command. 2745 * 2746 * LOCKING: 2747 * spin_lock_irqsave(host lock) 2748 */ 2749 static unsigned int ata_scsiop_report_luns(struct ata_device *dev, 2750 struct scsi_cmnd *cmd, u8 *rbuf) 2751 { 2752 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2753 2754 return 16; 2755 } 2756 2757 /* 2758 * ATAPI devices typically report zero for their SCSI version, and sometimes 2759 * deviate from the spec WRT response data format. If SCSI version is 2760 * reported as zero like normal, then we make the following fixups: 2761 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2762 * modern device. 2763 * 2) Ensure response data format / ATAPI information are always correct. 2764 */ 2765 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2766 { 2767 u8 buf[4]; 2768 2769 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2770 if (buf[2] == 0) { 2771 buf[2] = 0x5; 2772 buf[3] = 0x32; 2773 } 2774 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2775 } 2776 2777 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2778 { 2779 struct scsi_cmnd *cmd = qc->scsicmd; 2780 unsigned int err_mask = qc->err_mask; 2781 2782 /* handle completion from EH */ 2783 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2784 2785 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2786 ata_gen_passthru_sense(qc); 2787 2788 /* SCSI EH automatically locks door if sdev->locked is 2789 * set. Sometimes door lock request continues to 2790 * fail, for example, when no media is present. This 2791 * creates a loop - SCSI EH issues door lock which 2792 * fails and gets invoked again to acquire sense data 2793 * for the failed command. 2794 * 2795 * If door lock fails, always clear sdev->locked to 2796 * avoid this infinite loop. 2797 * 2798 * This may happen before SCSI scan is complete. Make 2799 * sure qc->dev->sdev isn't NULL before dereferencing. 2800 */ 2801 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2802 qc->dev->sdev->locked = 0; 2803 2804 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2805 ata_qc_done(qc); 2806 return; 2807 } 2808 2809 /* successful completion path */ 2810 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2811 atapi_fixup_inquiry(cmd); 2812 cmd->result = SAM_STAT_GOOD; 2813 2814 ata_qc_done(qc); 2815 } 2816 /** 2817 * atapi_xlat - Initialize PACKET taskfile 2818 * @qc: command structure to be initialized 2819 * 2820 * LOCKING: 2821 * spin_lock_irqsave(host lock) 2822 * 2823 * RETURNS: 2824 * Zero on success, non-zero on failure. 2825 */ 2826 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2827 { 2828 struct scsi_cmnd *scmd = qc->scsicmd; 2829 struct ata_device *dev = qc->dev; 2830 int nodata = (scmd->sc_data_direction == DMA_NONE); 2831 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2832 unsigned int nbytes; 2833 2834 memset(qc->cdb, 0, dev->cdb_len); 2835 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2836 2837 qc->complete_fn = atapi_qc_complete; 2838 2839 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2840 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2841 qc->tf.flags |= ATA_TFLAG_WRITE; 2842 } 2843 2844 qc->tf.command = ATA_CMD_PACKET; 2845 ata_qc_set_pc_nbytes(qc); 2846 2847 /* check whether ATAPI DMA is safe */ 2848 if (!nodata && !using_pio && atapi_check_dma(qc)) 2849 using_pio = 1; 2850 2851 /* Some controller variants snoop this value for Packet 2852 * transfers to do state machine and FIFO management. Thus we 2853 * want to set it properly, and for DMA where it is 2854 * effectively meaningless. 2855 */ 2856 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2857 2858 /* Most ATAPI devices which honor transfer chunk size don't 2859 * behave according to the spec when odd chunk size which 2860 * matches the transfer length is specified. If the number of 2861 * bytes to transfer is 2n+1. According to the spec, what 2862 * should happen is to indicate that 2n+1 is going to be 2863 * transferred and transfer 2n+2 bytes where the last byte is 2864 * padding. 2865 * 2866 * In practice, this doesn't happen. ATAPI devices first 2867 * indicate and transfer 2n bytes and then indicate and 2868 * transfer 2 bytes where the last byte is padding. 2869 * 2870 * This inconsistency confuses several controllers which 2871 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2872 * These controllers use actual number of transferred bytes to 2873 * update DMA pointer and transfer of 4n+2 bytes make those 2874 * controller push DMA pointer by 4n+4 bytes because SATA data 2875 * FISes are aligned to 4 bytes. This causes data corruption 2876 * and buffer overrun. 2877 * 2878 * Always setting nbytes to even number solves this problem 2879 * because then ATAPI devices don't have to split data at 2n 2880 * boundaries. 2881 */ 2882 if (nbytes & 0x1) 2883 nbytes++; 2884 2885 qc->tf.lbam = (nbytes & 0xFF); 2886 qc->tf.lbah = (nbytes >> 8); 2887 2888 if (nodata) 2889 qc->tf.protocol = ATAPI_PROT_NODATA; 2890 else if (using_pio) 2891 qc->tf.protocol = ATAPI_PROT_PIO; 2892 else { 2893 /* DMA data xfer */ 2894 qc->tf.protocol = ATAPI_PROT_DMA; 2895 qc->tf.feature |= ATAPI_PKT_DMA; 2896 2897 if ((dev->flags & ATA_DFLAG_DMADIR) && 2898 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2899 /* some SATA bridges need us to indicate data xfer direction */ 2900 qc->tf.feature |= ATAPI_DMADIR; 2901 } 2902 2903 2904 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2905 as ATAPI tape drives don't get this right otherwise */ 2906 return 0; 2907 } 2908 2909 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 2910 { 2911 /* 2912 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 2913 * or 2 (IDE master + slave case). However, the former case includes 2914 * libsas hosted devices which are numbered per scsi host, leading 2915 * to devno potentially being larger than 0 but with each struct 2916 * ata_device having its own struct ata_port and struct ata_link. 2917 * To accommodate these, ignore devno and always use device number 0. 2918 */ 2919 if (likely(!sata_pmp_attached(ap))) { 2920 int link_max_devices = ata_link_max_devices(&ap->link); 2921 2922 if (link_max_devices == 1) 2923 return &ap->link.device[0]; 2924 2925 if (devno < link_max_devices) 2926 return &ap->link.device[devno]; 2927 2928 return NULL; 2929 } 2930 2931 /* 2932 * For PMP-attached devices, the device number corresponds to C 2933 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 2934 * for the device. 2935 */ 2936 if (devno < ap->nr_pmp_links) 2937 return &ap->pmp_link[devno].device[0]; 2938 2939 return NULL; 2940 } 2941 2942 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2943 const struct scsi_device *scsidev) 2944 { 2945 int devno; 2946 2947 /* skip commands not addressed to targets we simulate */ 2948 if (!sata_pmp_attached(ap)) { 2949 if (unlikely(scsidev->channel || scsidev->lun)) 2950 return NULL; 2951 devno = scsidev->id; 2952 } else { 2953 if (unlikely(scsidev->id || scsidev->lun)) 2954 return NULL; 2955 devno = scsidev->channel; 2956 } 2957 2958 return ata_find_dev(ap, devno); 2959 } 2960 2961 /** 2962 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2963 * @ap: ATA port to which the device is attached 2964 * @scsidev: SCSI device from which we derive the ATA device 2965 * 2966 * Given various information provided in struct scsi_cmnd, 2967 * map that onto an ATA bus, and using that mapping 2968 * determine which ata_device is associated with the 2969 * SCSI command to be sent. 2970 * 2971 * LOCKING: 2972 * spin_lock_irqsave(host lock) 2973 * 2974 * RETURNS: 2975 * Associated ATA device, or %NULL if not found. 2976 */ 2977 struct ata_device * 2978 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2979 { 2980 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2981 2982 if (unlikely(!dev || !ata_dev_enabled(dev))) 2983 return NULL; 2984 2985 return dev; 2986 } 2987 2988 /* 2989 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2990 * @byte1: Byte 1 from pass-thru CDB. 2991 * 2992 * RETURNS: 2993 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2994 */ 2995 static u8 2996 ata_scsi_map_proto(u8 byte1) 2997 { 2998 switch((byte1 & 0x1e) >> 1) { 2999 case 3: /* Non-data */ 3000 return ATA_PROT_NODATA; 3001 3002 case 6: /* DMA */ 3003 case 10: /* UDMA Data-in */ 3004 case 11: /* UDMA Data-Out */ 3005 return ATA_PROT_DMA; 3006 3007 case 4: /* PIO Data-in */ 3008 case 5: /* PIO Data-out */ 3009 return ATA_PROT_PIO; 3010 3011 case 12: /* FPDMA */ 3012 return ATA_PROT_NCQ; 3013 3014 case 0: /* Hard Reset */ 3015 case 1: /* SRST */ 3016 case 8: /* Device Diagnostic */ 3017 case 9: /* Device Reset */ 3018 case 7: /* DMA Queued */ 3019 case 15: /* Return Response Info */ 3020 default: /* Reserved */ 3021 break; 3022 } 3023 3024 return ATA_PROT_UNKNOWN; 3025 } 3026 3027 /** 3028 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3029 * @qc: command structure to be initialized 3030 * 3031 * Handles either 12, 16, or 32-byte versions of the CDB. 3032 * 3033 * RETURNS: 3034 * Zero on success, non-zero on failure. 3035 */ 3036 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3037 { 3038 struct ata_taskfile *tf = &(qc->tf); 3039 struct scsi_cmnd *scmd = qc->scsicmd; 3040 struct ata_device *dev = qc->dev; 3041 const u8 *cdb = scmd->cmnd; 3042 u16 fp; 3043 u16 cdb_offset = 0; 3044 3045 /* 7Fh variable length cmd means a ata pass-thru(32) */ 3046 if (cdb[0] == VARIABLE_LENGTH_CMD) 3047 cdb_offset = 9; 3048 3049 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 3050 if (tf->protocol == ATA_PROT_UNKNOWN) { 3051 fp = 1; 3052 goto invalid_fld; 3053 } 3054 3055 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 3056 /* 3057 * When T_LENGTH is zero (No data is transferred), dir should 3058 * be DMA_NONE. 3059 */ 3060 if (scmd->sc_data_direction != DMA_NONE) { 3061 fp = 2 + cdb_offset; 3062 goto invalid_fld; 3063 } 3064 3065 if (ata_is_ncq(tf->protocol)) 3066 tf->protocol = ATA_PROT_NCQ_NODATA; 3067 } 3068 3069 /* enable LBA */ 3070 tf->flags |= ATA_TFLAG_LBA; 3071 3072 /* 3073 * 12 and 16 byte CDBs use different offsets to 3074 * provide the various register values. 3075 */ 3076 switch (cdb[0]) { 3077 case ATA_16: 3078 /* 3079 * 16-byte CDB - may contain extended commands. 3080 * 3081 * If that is the case, copy the upper byte register values. 3082 */ 3083 if (cdb[1] & 0x01) { 3084 tf->hob_feature = cdb[3]; 3085 tf->hob_nsect = cdb[5]; 3086 tf->hob_lbal = cdb[7]; 3087 tf->hob_lbam = cdb[9]; 3088 tf->hob_lbah = cdb[11]; 3089 tf->flags |= ATA_TFLAG_LBA48; 3090 } else 3091 tf->flags &= ~ATA_TFLAG_LBA48; 3092 3093 /* 3094 * Always copy low byte, device and command registers. 3095 */ 3096 tf->feature = cdb[4]; 3097 tf->nsect = cdb[6]; 3098 tf->lbal = cdb[8]; 3099 tf->lbam = cdb[10]; 3100 tf->lbah = cdb[12]; 3101 tf->device = cdb[13]; 3102 tf->command = cdb[14]; 3103 break; 3104 case ATA_12: 3105 /* 3106 * 12-byte CDB - incapable of extended commands. 3107 */ 3108 tf->flags &= ~ATA_TFLAG_LBA48; 3109 3110 tf->feature = cdb[3]; 3111 tf->nsect = cdb[4]; 3112 tf->lbal = cdb[5]; 3113 tf->lbam = cdb[6]; 3114 tf->lbah = cdb[7]; 3115 tf->device = cdb[8]; 3116 tf->command = cdb[9]; 3117 break; 3118 default: 3119 /* 3120 * 32-byte CDB - may contain extended command fields. 3121 * 3122 * If that is the case, copy the upper byte register values. 3123 */ 3124 if (cdb[10] & 0x01) { 3125 tf->hob_feature = cdb[20]; 3126 tf->hob_nsect = cdb[22]; 3127 tf->hob_lbal = cdb[16]; 3128 tf->hob_lbam = cdb[15]; 3129 tf->hob_lbah = cdb[14]; 3130 tf->flags |= ATA_TFLAG_LBA48; 3131 } else 3132 tf->flags &= ~ATA_TFLAG_LBA48; 3133 3134 tf->feature = cdb[21]; 3135 tf->nsect = cdb[23]; 3136 tf->lbal = cdb[19]; 3137 tf->lbam = cdb[18]; 3138 tf->lbah = cdb[17]; 3139 tf->device = cdb[24]; 3140 tf->command = cdb[25]; 3141 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3142 break; 3143 } 3144 3145 /* For NCQ commands copy the tag value */ 3146 if (ata_is_ncq(tf->protocol)) 3147 tf->nsect = qc->hw_tag << 3; 3148 3149 /* enforce correct master/slave bit */ 3150 tf->device = dev->devno ? 3151 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3152 3153 switch (tf->command) { 3154 /* READ/WRITE LONG use a non-standard sect_size */ 3155 case ATA_CMD_READ_LONG: 3156 case ATA_CMD_READ_LONG_ONCE: 3157 case ATA_CMD_WRITE_LONG: 3158 case ATA_CMD_WRITE_LONG_ONCE: 3159 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3160 fp = 1; 3161 goto invalid_fld; 3162 } 3163 qc->sect_size = scsi_bufflen(scmd); 3164 break; 3165 3166 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3167 case ATA_CMD_CFA_WRITE_NE: 3168 case ATA_CMD_CFA_TRANS_SECT: 3169 case ATA_CMD_CFA_WRITE_MULT_NE: 3170 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3171 case ATA_CMD_READ: 3172 case ATA_CMD_READ_EXT: 3173 case ATA_CMD_READ_QUEUED: 3174 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3175 case ATA_CMD_FPDMA_READ: 3176 case ATA_CMD_READ_MULTI: 3177 case ATA_CMD_READ_MULTI_EXT: 3178 case ATA_CMD_PIO_READ: 3179 case ATA_CMD_PIO_READ_EXT: 3180 case ATA_CMD_READ_STREAM_DMA_EXT: 3181 case ATA_CMD_READ_STREAM_EXT: 3182 case ATA_CMD_VERIFY: 3183 case ATA_CMD_VERIFY_EXT: 3184 case ATA_CMD_WRITE: 3185 case ATA_CMD_WRITE_EXT: 3186 case ATA_CMD_WRITE_FUA_EXT: 3187 case ATA_CMD_WRITE_QUEUED: 3188 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3189 case ATA_CMD_FPDMA_WRITE: 3190 case ATA_CMD_WRITE_MULTI: 3191 case ATA_CMD_WRITE_MULTI_EXT: 3192 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3193 case ATA_CMD_PIO_WRITE: 3194 case ATA_CMD_PIO_WRITE_EXT: 3195 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3196 case ATA_CMD_WRITE_STREAM_EXT: 3197 qc->sect_size = scmd->device->sector_size; 3198 break; 3199 3200 /* Everything else uses 512 byte "sectors" */ 3201 default: 3202 qc->sect_size = ATA_SECT_SIZE; 3203 } 3204 3205 /* 3206 * Set flags so that all registers will be written, pass on 3207 * write indication (used for PIO/DMA setup), result TF is 3208 * copied back and we don't whine too much about its failure. 3209 */ 3210 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3211 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3212 tf->flags |= ATA_TFLAG_WRITE; 3213 3214 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3215 3216 /* 3217 * Set transfer length. 3218 * 3219 * TODO: find out if we need to do more here to 3220 * cover scatter/gather case. 3221 */ 3222 ata_qc_set_pc_nbytes(qc); 3223 3224 /* We may not issue DMA commands if no DMA mode is set */ 3225 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3226 fp = 1; 3227 goto invalid_fld; 3228 } 3229 3230 /* We may not issue NCQ commands to devices not supporting NCQ */ 3231 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3232 fp = 1; 3233 goto invalid_fld; 3234 } 3235 3236 /* sanity check for pio multi commands */ 3237 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3238 fp = 1; 3239 goto invalid_fld; 3240 } 3241 3242 if (is_multi_taskfile(tf)) { 3243 unsigned int multi_count = 1 << (cdb[1] >> 5); 3244 3245 /* compare the passed through multi_count 3246 * with the cached multi_count of libata 3247 */ 3248 if (multi_count != dev->multi_count) 3249 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3250 multi_count); 3251 } 3252 3253 /* 3254 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3255 * SET_FEATURES - XFER MODE must be preceded/succeeded 3256 * by an update to hardware-specific registers for each 3257 * controller (i.e. the reason for ->set_piomode(), 3258 * ->set_dmamode(), and ->post_set_mode() hooks). 3259 */ 3260 if (tf->command == ATA_CMD_SET_FEATURES && 3261 tf->feature == SETFEATURES_XFER) { 3262 fp = (cdb[0] == ATA_16) ? 4 : 3; 3263 goto invalid_fld; 3264 } 3265 3266 /* 3267 * Filter TPM commands by default. These provide an 3268 * essentially uncontrolled encrypted "back door" between 3269 * applications and the disk. Set libata.allow_tpm=1 if you 3270 * have a real reason for wanting to use them. This ensures 3271 * that installed software cannot easily mess stuff up without 3272 * user intent. DVR type users will probably ship with this enabled 3273 * for movie content management. 3274 * 3275 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3276 * for this and should do in future but that it is not sufficient as 3277 * DCS is an optional feature set. Thus we also do the software filter 3278 * so that we comply with the TC consortium stated goal that the user 3279 * can turn off TC features of their system. 3280 */ 3281 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3282 fp = (cdb[0] == ATA_16) ? 14 : 9; 3283 goto invalid_fld; 3284 } 3285 3286 return 0; 3287 3288 invalid_fld: 3289 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3290 return 1; 3291 } 3292 3293 /** 3294 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3295 * @cmd: SCSI command being translated 3296 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3297 * @sector: Starting sector 3298 * @count: Total Range of request in logical sectors 3299 * 3300 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3301 * descriptor. 3302 * 3303 * Upto 64 entries of the format: 3304 * 63:48 Range Length 3305 * 47:0 LBA 3306 * 3307 * Range Length of 0 is ignored. 3308 * LBA's should be sorted order and not overlap. 3309 * 3310 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3311 * 3312 * Return: Number of bytes copied into sglist. 3313 */ 3314 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3315 u64 sector, u32 count) 3316 { 3317 struct scsi_device *sdp = cmd->device; 3318 size_t len = sdp->sector_size; 3319 size_t r; 3320 __le64 *buf; 3321 u32 i = 0; 3322 unsigned long flags; 3323 3324 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3325 3326 if (len > ATA_SCSI_RBUF_SIZE) 3327 len = ATA_SCSI_RBUF_SIZE; 3328 3329 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3330 buf = ((void *)ata_scsi_rbuf); 3331 memset(buf, 0, len); 3332 while (i < trmax) { 3333 u64 entry = sector | 3334 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3335 buf[i++] = __cpu_to_le64(entry); 3336 if (count <= 0xffff) 3337 break; 3338 count -= 0xffff; 3339 sector += 0xffff; 3340 } 3341 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3342 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3343 3344 return r; 3345 } 3346 3347 /** 3348 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3349 * @qc: Command to be translated 3350 * 3351 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3352 * an SCT Write Same command. 3353 * Based on WRITE SAME has the UNMAP flag: 3354 * 3355 * - When set translate to DSM TRIM 3356 * - When clear translate to SCT Write Same 3357 */ 3358 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3359 { 3360 struct ata_taskfile *tf = &qc->tf; 3361 struct scsi_cmnd *scmd = qc->scsicmd; 3362 struct scsi_device *sdp = scmd->device; 3363 size_t len = sdp->sector_size; 3364 struct ata_device *dev = qc->dev; 3365 const u8 *cdb = scmd->cmnd; 3366 u64 block; 3367 u32 n_block; 3368 const u32 trmax = len >> 3; 3369 u32 size; 3370 u16 fp; 3371 u8 bp = 0xff; 3372 u8 unmap = cdb[1] & 0x8; 3373 3374 /* we may not issue DMA commands if no DMA mode is set */ 3375 if (unlikely(!ata_dma_enabled(dev))) 3376 goto invalid_opcode; 3377 3378 /* 3379 * We only allow sending this command through the block layer, 3380 * as it modifies the DATA OUT buffer, which would corrupt user 3381 * memory for SG_IO commands. 3382 */ 3383 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3384 goto invalid_opcode; 3385 3386 if (unlikely(scmd->cmd_len < 16)) { 3387 fp = 15; 3388 goto invalid_fld; 3389 } 3390 scsi_16_lba_len(cdb, &block, &n_block); 3391 3392 if (!unmap || (dev->quirks & ATA_QUIRK_NOTRIM) || 3393 !ata_id_has_trim(dev->id)) { 3394 fp = 1; 3395 bp = 3; 3396 goto invalid_fld; 3397 } 3398 /* If the request is too large the cmd is invalid */ 3399 if (n_block > 0xffff * trmax) { 3400 fp = 2; 3401 goto invalid_fld; 3402 } 3403 3404 /* 3405 * WRITE SAME always has a sector sized buffer as payload, this 3406 * should never be a multiple entry S/G list. 3407 */ 3408 if (!scsi_sg_count(scmd)) 3409 goto invalid_param_len; 3410 3411 /* 3412 * size must match sector size in bytes 3413 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3414 * is defined as number of 512 byte blocks to be transferred. 3415 */ 3416 3417 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3418 if (size != len) 3419 goto invalid_param_len; 3420 3421 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3422 /* Newer devices support queued TRIM commands */ 3423 tf->protocol = ATA_PROT_NCQ; 3424 tf->command = ATA_CMD_FPDMA_SEND; 3425 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3426 tf->nsect = qc->hw_tag << 3; 3427 tf->hob_feature = (size / 512) >> 8; 3428 tf->feature = size / 512; 3429 3430 tf->auxiliary = 1; 3431 } else { 3432 tf->protocol = ATA_PROT_DMA; 3433 tf->hob_feature = 0; 3434 tf->feature = ATA_DSM_TRIM; 3435 tf->hob_nsect = (size / 512) >> 8; 3436 tf->nsect = size / 512; 3437 tf->command = ATA_CMD_DSM; 3438 } 3439 3440 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3441 ATA_TFLAG_WRITE; 3442 3443 ata_qc_set_pc_nbytes(qc); 3444 3445 return 0; 3446 3447 invalid_fld: 3448 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3449 return 1; 3450 invalid_param_len: 3451 /* "Parameter list length error" */ 3452 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3453 return 1; 3454 invalid_opcode: 3455 /* "Invalid command operation code" */ 3456 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3457 return 1; 3458 } 3459 3460 /** 3461 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3462 * @dev: Target device. 3463 * @cmd: SCSI command of interest. 3464 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3465 * 3466 * Yields a subset to satisfy scsi_report_opcode() 3467 * 3468 * LOCKING: 3469 * spin_lock_irqsave(host lock) 3470 */ 3471 static unsigned int ata_scsiop_maint_in(struct ata_device *dev, 3472 struct scsi_cmnd *cmd, u8 *rbuf) 3473 { 3474 u8 *cdb = cmd->cmnd; 3475 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3476 3477 if ((cdb[1] & 0x1f) != MI_REPORT_SUPPORTED_OPERATION_CODES) { 3478 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 3479 return 0; 3480 } 3481 3482 if (cdb[2] != 1 && cdb[2] != 3) { 3483 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3484 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 3485 return 0; 3486 } 3487 3488 switch (cdb[3]) { 3489 case INQUIRY: 3490 case MODE_SENSE: 3491 case MODE_SENSE_10: 3492 case READ_CAPACITY: 3493 case SERVICE_ACTION_IN_16: 3494 case REPORT_LUNS: 3495 case REQUEST_SENSE: 3496 case SYNCHRONIZE_CACHE: 3497 case SYNCHRONIZE_CACHE_16: 3498 case REZERO_UNIT: 3499 case SEEK_6: 3500 case SEEK_10: 3501 case TEST_UNIT_READY: 3502 case SEND_DIAGNOSTIC: 3503 case MAINTENANCE_IN: 3504 case READ_6: 3505 case READ_10: 3506 case WRITE_6: 3507 case WRITE_10: 3508 case ATA_12: 3509 case ATA_16: 3510 case VERIFY: 3511 case VERIFY_16: 3512 case MODE_SELECT: 3513 case MODE_SELECT_10: 3514 case START_STOP: 3515 supported = 3; 3516 break; 3517 case READ_16: 3518 supported = 3; 3519 if (dev->flags & ATA_DFLAG_CDL) { 3520 /* 3521 * CDL read descriptors map to the T2A page, that is, 3522 * rwcdlp = 0x01 and cdlp = 0x01 3523 */ 3524 rwcdlp = 0x01; 3525 cdlp = 0x01 << 3; 3526 } 3527 break; 3528 case WRITE_16: 3529 supported = 3; 3530 if (dev->flags & ATA_DFLAG_CDL) { 3531 /* 3532 * CDL write descriptors map to the T2B page, that is, 3533 * rwcdlp = 0x01 and cdlp = 0x02 3534 */ 3535 rwcdlp = 0x01; 3536 cdlp = 0x02 << 3; 3537 } 3538 break; 3539 case ZBC_IN: 3540 case ZBC_OUT: 3541 if (ata_id_zoned_cap(dev->id) || 3542 dev->class == ATA_DEV_ZAC) 3543 supported = 3; 3544 break; 3545 case SECURITY_PROTOCOL_IN: 3546 case SECURITY_PROTOCOL_OUT: 3547 if (dev->flags & ATA_DFLAG_TRUSTED) 3548 supported = 3; 3549 break; 3550 default: 3551 break; 3552 } 3553 3554 /* One command format */ 3555 rbuf[0] = rwcdlp; 3556 rbuf[1] = cdlp | supported; 3557 3558 return 4; 3559 } 3560 3561 /** 3562 * ata_scsi_report_zones_complete - convert ATA output 3563 * @qc: command structure returning the data 3564 * 3565 * Convert T-13 little-endian field representation into 3566 * T-10 big-endian field representation. 3567 * What a mess. 3568 */ 3569 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3570 { 3571 struct scsi_cmnd *scmd = qc->scsicmd; 3572 struct sg_mapping_iter miter; 3573 unsigned long flags; 3574 unsigned int bytes = 0; 3575 3576 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3577 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3578 3579 local_irq_save(flags); 3580 while (sg_miter_next(&miter)) { 3581 unsigned int offset = 0; 3582 3583 if (bytes == 0) { 3584 char *hdr; 3585 u32 list_length; 3586 u64 max_lba, opt_lba; 3587 u16 same; 3588 3589 /* Swizzle header */ 3590 hdr = miter.addr; 3591 list_length = get_unaligned_le32(&hdr[0]); 3592 same = get_unaligned_le16(&hdr[4]); 3593 max_lba = get_unaligned_le64(&hdr[8]); 3594 opt_lba = get_unaligned_le64(&hdr[16]); 3595 put_unaligned_be32(list_length, &hdr[0]); 3596 hdr[4] = same & 0xf; 3597 put_unaligned_be64(max_lba, &hdr[8]); 3598 put_unaligned_be64(opt_lba, &hdr[16]); 3599 offset += 64; 3600 bytes += 64; 3601 } 3602 while (offset < miter.length) { 3603 char *rec; 3604 u8 cond, type, non_seq, reset; 3605 u64 size, start, wp; 3606 3607 /* Swizzle zone descriptor */ 3608 rec = miter.addr + offset; 3609 type = rec[0] & 0xf; 3610 cond = (rec[1] >> 4) & 0xf; 3611 non_seq = (rec[1] & 2); 3612 reset = (rec[1] & 1); 3613 size = get_unaligned_le64(&rec[8]); 3614 start = get_unaligned_le64(&rec[16]); 3615 wp = get_unaligned_le64(&rec[24]); 3616 rec[0] = type; 3617 rec[1] = (cond << 4) | non_seq | reset; 3618 put_unaligned_be64(size, &rec[8]); 3619 put_unaligned_be64(start, &rec[16]); 3620 put_unaligned_be64(wp, &rec[24]); 3621 WARN_ON(offset + 64 > miter.length); 3622 offset += 64; 3623 bytes += 64; 3624 } 3625 } 3626 sg_miter_stop(&miter); 3627 local_irq_restore(flags); 3628 3629 ata_scsi_qc_complete(qc); 3630 } 3631 3632 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3633 { 3634 struct ata_taskfile *tf = &qc->tf; 3635 struct scsi_cmnd *scmd = qc->scsicmd; 3636 const u8 *cdb = scmd->cmnd; 3637 u16 sect, fp = (u16)-1; 3638 u8 sa, options, bp = 0xff; 3639 u64 block; 3640 u32 n_block; 3641 3642 if (unlikely(scmd->cmd_len < 16)) { 3643 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3644 scmd->cmd_len); 3645 fp = 15; 3646 goto invalid_fld; 3647 } 3648 scsi_16_lba_len(cdb, &block, &n_block); 3649 if (n_block != scsi_bufflen(scmd)) { 3650 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3651 n_block, scsi_bufflen(scmd)); 3652 goto invalid_param_len; 3653 } 3654 sa = cdb[1] & 0x1f; 3655 if (sa != ZI_REPORT_ZONES) { 3656 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3657 fp = 1; 3658 goto invalid_fld; 3659 } 3660 /* 3661 * ZAC allows only for transfers in 512 byte blocks, 3662 * and uses a 16 bit value for the transfer count. 3663 */ 3664 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3665 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3666 goto invalid_param_len; 3667 } 3668 sect = n_block / 512; 3669 options = cdb[14] & 0xbf; 3670 3671 if (ata_ncq_enabled(qc->dev) && 3672 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3673 tf->protocol = ATA_PROT_NCQ; 3674 tf->command = ATA_CMD_FPDMA_RECV; 3675 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3676 tf->nsect = qc->hw_tag << 3; 3677 tf->feature = sect & 0xff; 3678 tf->hob_feature = (sect >> 8) & 0xff; 3679 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3680 } else { 3681 tf->command = ATA_CMD_ZAC_MGMT_IN; 3682 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3683 tf->protocol = ATA_PROT_DMA; 3684 tf->hob_feature = options; 3685 tf->hob_nsect = (sect >> 8) & 0xff; 3686 tf->nsect = sect & 0xff; 3687 } 3688 tf->device = ATA_LBA; 3689 tf->lbah = (block >> 16) & 0xff; 3690 tf->lbam = (block >> 8) & 0xff; 3691 tf->lbal = block & 0xff; 3692 tf->hob_lbah = (block >> 40) & 0xff; 3693 tf->hob_lbam = (block >> 32) & 0xff; 3694 tf->hob_lbal = (block >> 24) & 0xff; 3695 3696 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3697 qc->flags |= ATA_QCFLAG_RESULT_TF; 3698 3699 ata_qc_set_pc_nbytes(qc); 3700 3701 qc->complete_fn = ata_scsi_report_zones_complete; 3702 3703 return 0; 3704 3705 invalid_fld: 3706 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3707 return 1; 3708 3709 invalid_param_len: 3710 /* "Parameter list length error" */ 3711 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3712 return 1; 3713 } 3714 3715 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3716 { 3717 struct ata_taskfile *tf = &qc->tf; 3718 struct scsi_cmnd *scmd = qc->scsicmd; 3719 struct ata_device *dev = qc->dev; 3720 const u8 *cdb = scmd->cmnd; 3721 u8 all, sa; 3722 u64 block; 3723 u32 n_block; 3724 u16 fp = (u16)-1; 3725 3726 if (unlikely(scmd->cmd_len < 16)) { 3727 fp = 15; 3728 goto invalid_fld; 3729 } 3730 3731 sa = cdb[1] & 0x1f; 3732 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3733 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3734 fp = 1; 3735 goto invalid_fld; 3736 } 3737 3738 scsi_16_lba_len(cdb, &block, &n_block); 3739 if (n_block) { 3740 /* 3741 * ZAC MANAGEMENT OUT doesn't define any length 3742 */ 3743 goto invalid_param_len; 3744 } 3745 3746 all = cdb[14] & 0x1; 3747 if (all) { 3748 /* 3749 * Ignore the block address (zone ID) as defined by ZBC. 3750 */ 3751 block = 0; 3752 } else if (block >= dev->n_sectors) { 3753 /* 3754 * Block must be a valid zone ID (a zone start LBA). 3755 */ 3756 fp = 2; 3757 goto invalid_fld; 3758 } 3759 3760 if (ata_ncq_enabled(qc->dev) && 3761 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3762 tf->protocol = ATA_PROT_NCQ_NODATA; 3763 tf->command = ATA_CMD_NCQ_NON_DATA; 3764 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3765 tf->nsect = qc->hw_tag << 3; 3766 tf->auxiliary = sa | ((u16)all << 8); 3767 } else { 3768 tf->protocol = ATA_PROT_NODATA; 3769 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3770 tf->feature = sa; 3771 tf->hob_feature = all; 3772 } 3773 tf->lbah = (block >> 16) & 0xff; 3774 tf->lbam = (block >> 8) & 0xff; 3775 tf->lbal = block & 0xff; 3776 tf->hob_lbah = (block >> 40) & 0xff; 3777 tf->hob_lbam = (block >> 32) & 0xff; 3778 tf->hob_lbal = (block >> 24) & 0xff; 3779 tf->device = ATA_LBA; 3780 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3781 3782 return 0; 3783 3784 invalid_fld: 3785 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3786 return 1; 3787 invalid_param_len: 3788 /* "Parameter list length error" */ 3789 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3790 return 1; 3791 } 3792 3793 /** 3794 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3795 * @qc: Storage for translated ATA taskfile 3796 * @buf: input buffer 3797 * @len: number of valid bytes in the input buffer 3798 * @fp: out parameter for the failed field on error 3799 * 3800 * Prepare a taskfile to modify caching information for the device. 3801 * 3802 * LOCKING: 3803 * None. 3804 */ 3805 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3806 const u8 *buf, int len, u16 *fp) 3807 { 3808 struct ata_taskfile *tf = &qc->tf; 3809 struct ata_device *dev = qc->dev; 3810 u8 mpage[CACHE_MPAGE_LEN]; 3811 u8 wce; 3812 int i; 3813 3814 /* 3815 * The first two bytes of def_cache_mpage are a header, so offsets 3816 * in mpage are off by 2 compared to buf. Same for len. 3817 */ 3818 3819 if (len != CACHE_MPAGE_LEN - 2) { 3820 *fp = min(len, CACHE_MPAGE_LEN - 2); 3821 return -EINVAL; 3822 } 3823 3824 wce = buf[0] & (1 << 2); 3825 3826 /* 3827 * Check that read-only bits are not modified. 3828 */ 3829 ata_msense_caching(dev->id, mpage, false); 3830 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3831 if (i == 0) 3832 continue; 3833 if (mpage[i + 2] != buf[i]) { 3834 *fp = i; 3835 return -EINVAL; 3836 } 3837 } 3838 3839 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3840 tf->protocol = ATA_PROT_NODATA; 3841 tf->nsect = 0; 3842 tf->command = ATA_CMD_SET_FEATURES; 3843 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3844 return 0; 3845 } 3846 3847 /* 3848 * Simulate MODE SELECT control mode page, sub-page 0. 3849 */ 3850 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3851 const u8 *buf, int len, u16 *fp) 3852 { 3853 struct ata_device *dev = qc->dev; 3854 u8 mpage[CONTROL_MPAGE_LEN]; 3855 u8 d_sense; 3856 int i; 3857 3858 /* 3859 * The first two bytes of def_control_mpage are a header, so offsets 3860 * in mpage are off by 2 compared to buf. Same for len. 3861 */ 3862 3863 if (len != CONTROL_MPAGE_LEN - 2) { 3864 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3865 return -EINVAL; 3866 } 3867 3868 d_sense = buf[0] & (1 << 2); 3869 3870 /* 3871 * Check that read-only bits are not modified. 3872 */ 3873 ata_msense_control_spg0(dev, mpage, false); 3874 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3875 if (i == 0) 3876 continue; 3877 if (mpage[2 + i] != buf[i]) { 3878 *fp = i; 3879 return -EINVAL; 3880 } 3881 } 3882 if (d_sense & (1 << 2)) 3883 dev->flags |= ATA_DFLAG_D_SENSE; 3884 else 3885 dev->flags &= ~ATA_DFLAG_D_SENSE; 3886 return 0; 3887 } 3888 3889 /* 3890 * Translate MODE SELECT control mode page, sub-pages f2h (ATA feature mode 3891 * page) into a SET FEATURES command. 3892 */ 3893 static unsigned int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 3894 const u8 *buf, int len, 3895 u16 *fp) 3896 { 3897 struct ata_device *dev = qc->dev; 3898 struct ata_taskfile *tf = &qc->tf; 3899 u8 cdl_action; 3900 3901 /* 3902 * The first four bytes of ATA Feature Control mode page are a header, 3903 * so offsets in mpage are off by 4 compared to buf. Same for len. 3904 */ 3905 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 3906 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 3907 return -EINVAL; 3908 } 3909 3910 /* Check cdl_ctrl */ 3911 switch (buf[0] & 0x03) { 3912 case 0: 3913 /* Disable CDL */ 3914 cdl_action = 0; 3915 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 3916 break; 3917 case 0x02: 3918 /* Enable CDL T2A/T2B: NCQ priority must be disabled */ 3919 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 3920 ata_dev_err(dev, 3921 "NCQ priority must be disabled to enable CDL\n"); 3922 return -EINVAL; 3923 } 3924 cdl_action = 1; 3925 dev->flags |= ATA_DFLAG_CDL_ENABLED; 3926 break; 3927 default: 3928 *fp = 0; 3929 return -EINVAL; 3930 } 3931 3932 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3933 tf->protocol = ATA_PROT_NODATA; 3934 tf->command = ATA_CMD_SET_FEATURES; 3935 tf->feature = SETFEATURES_CDL; 3936 tf->nsect = cdl_action; 3937 3938 return 1; 3939 } 3940 3941 /** 3942 * ata_mselect_control - Simulate MODE SELECT for control page 3943 * @qc: Storage for translated ATA taskfile 3944 * @spg: target sub-page of the control page 3945 * @buf: input buffer 3946 * @len: number of valid bytes in the input buffer 3947 * @fp: out parameter for the failed field on error 3948 * 3949 * Prepare a taskfile to modify caching information for the device. 3950 * 3951 * LOCKING: 3952 * None. 3953 */ 3954 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 3955 const u8 *buf, int len, u16 *fp) 3956 { 3957 switch (spg) { 3958 case 0: 3959 return ata_mselect_control_spg0(qc, buf, len, fp); 3960 case ATA_FEATURE_SUB_MPAGE: 3961 return ata_mselect_control_ata_feature(qc, buf, len, fp); 3962 default: 3963 return -EINVAL; 3964 } 3965 } 3966 3967 /** 3968 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3969 * @qc: Storage for translated ATA taskfile 3970 * 3971 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3972 * Assume this is invoked for direct access devices (e.g. disks) only. 3973 * There should be no block descriptor for other device types. 3974 * 3975 * LOCKING: 3976 * spin_lock_irqsave(host lock) 3977 */ 3978 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3979 { 3980 struct scsi_cmnd *scmd = qc->scsicmd; 3981 const u8 *cdb = scmd->cmnd; 3982 u8 pg, spg; 3983 unsigned six_byte, pg_len, hdr_len, bd_len; 3984 int len, ret; 3985 u16 fp = (u16)-1; 3986 u8 bp = 0xff; 3987 u8 buffer[64]; 3988 const u8 *p = buffer; 3989 3990 six_byte = (cdb[0] == MODE_SELECT); 3991 if (six_byte) { 3992 if (scmd->cmd_len < 5) { 3993 fp = 4; 3994 goto invalid_fld; 3995 } 3996 3997 len = cdb[4]; 3998 hdr_len = 4; 3999 } else { 4000 if (scmd->cmd_len < 9) { 4001 fp = 8; 4002 goto invalid_fld; 4003 } 4004 4005 len = get_unaligned_be16(&cdb[7]); 4006 hdr_len = 8; 4007 } 4008 4009 /* We only support PF=1, SP=0. */ 4010 if ((cdb[1] & 0x11) != 0x10) { 4011 fp = 1; 4012 bp = (cdb[1] & 0x01) ? 1 : 5; 4013 goto invalid_fld; 4014 } 4015 4016 /* Test early for possible overrun. */ 4017 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 4018 goto invalid_param_len; 4019 4020 /* Move past header and block descriptors. */ 4021 if (len < hdr_len) 4022 goto invalid_param_len; 4023 4024 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 4025 buffer, sizeof(buffer))) 4026 goto invalid_param_len; 4027 4028 if (six_byte) 4029 bd_len = p[3]; 4030 else 4031 bd_len = get_unaligned_be16(&p[6]); 4032 4033 len -= hdr_len; 4034 p += hdr_len; 4035 if (len < bd_len) 4036 goto invalid_param_len; 4037 if (bd_len != 0 && bd_len != 8) { 4038 fp = (six_byte) ? 3 : 6; 4039 fp += bd_len + hdr_len; 4040 goto invalid_param; 4041 } 4042 4043 len -= bd_len; 4044 p += bd_len; 4045 if (len == 0) 4046 goto skip; 4047 4048 /* Parse both possible formats for the mode page headers. */ 4049 pg = p[0] & 0x3f; 4050 if (p[0] & 0x40) { 4051 if (len < 4) 4052 goto invalid_param_len; 4053 4054 spg = p[1]; 4055 pg_len = get_unaligned_be16(&p[2]); 4056 p += 4; 4057 len -= 4; 4058 } else { 4059 if (len < 2) 4060 goto invalid_param_len; 4061 4062 spg = 0; 4063 pg_len = p[1]; 4064 p += 2; 4065 len -= 2; 4066 } 4067 4068 /* 4069 * Supported subpages: all subpages and ATA feature sub-page f2h of 4070 * the control page. 4071 */ 4072 if (spg) { 4073 switch (spg) { 4074 case ALL_SUB_MPAGES: 4075 /* All subpages is not supported for the control page */ 4076 if (pg == CONTROL_MPAGE) { 4077 fp = (p[0] & 0x40) ? 1 : 0; 4078 fp += hdr_len + bd_len; 4079 goto invalid_param; 4080 } 4081 break; 4082 case ATA_FEATURE_SUB_MPAGE: 4083 if (qc->dev->flags & ATA_DFLAG_CDL && 4084 pg == CONTROL_MPAGE) 4085 break; 4086 fallthrough; 4087 default: 4088 fp = (p[0] & 0x40) ? 1 : 0; 4089 fp += hdr_len + bd_len; 4090 goto invalid_param; 4091 } 4092 } 4093 if (pg_len > len) 4094 goto invalid_param_len; 4095 4096 switch (pg) { 4097 case CACHE_MPAGE: 4098 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4099 fp += hdr_len + bd_len; 4100 goto invalid_param; 4101 } 4102 break; 4103 case CONTROL_MPAGE: 4104 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 4105 if (ret < 0) { 4106 fp += hdr_len + bd_len; 4107 goto invalid_param; 4108 } 4109 if (!ret) 4110 goto skip; /* No ATA command to send */ 4111 break; 4112 default: 4113 /* Invalid page code */ 4114 fp = bd_len + hdr_len; 4115 goto invalid_param; 4116 } 4117 4118 /* 4119 * Only one page has changeable data, so we only support setting one 4120 * page at a time. 4121 */ 4122 if (len > pg_len) 4123 goto invalid_param; 4124 4125 return 0; 4126 4127 invalid_fld: 4128 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4129 return 1; 4130 4131 invalid_param: 4132 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4133 return 1; 4134 4135 invalid_param_len: 4136 /* "Parameter list length error" */ 4137 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4138 return 1; 4139 4140 skip: 4141 scmd->result = SAM_STAT_GOOD; 4142 return 1; 4143 } 4144 4145 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4146 { 4147 if (len == 0) 4148 return ATA_CMD_TRUSTED_NONDATA; 4149 else if (send) 4150 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4151 else 4152 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4153 } 4154 4155 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4156 { 4157 struct scsi_cmnd *scmd = qc->scsicmd; 4158 const u8 *cdb = scmd->cmnd; 4159 struct ata_taskfile *tf = &qc->tf; 4160 u8 secp = cdb[1]; 4161 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4162 u16 spsp = get_unaligned_be16(&cdb[2]); 4163 u32 len = get_unaligned_be32(&cdb[6]); 4164 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4165 4166 /* 4167 * We don't support the ATA "security" protocol. 4168 */ 4169 if (secp == 0xef) { 4170 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4171 return 1; 4172 } 4173 4174 if (cdb[4] & 7) { /* INC_512 */ 4175 if (len > 0xffff) { 4176 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4177 return 1; 4178 } 4179 } else { 4180 if (len > 0x01fffe00) { 4181 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4182 return 1; 4183 } 4184 4185 /* convert to the sector-based ATA addressing */ 4186 len = (len + 511) / 512; 4187 } 4188 4189 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4190 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4191 if (send) 4192 tf->flags |= ATA_TFLAG_WRITE; 4193 tf->command = ata_scsi_trusted_op(len, send, dma); 4194 tf->feature = secp; 4195 tf->lbam = spsp & 0xff; 4196 tf->lbah = spsp >> 8; 4197 4198 if (len) { 4199 tf->nsect = len & 0xff; 4200 tf->lbal = len >> 8; 4201 } else { 4202 if (!send) 4203 tf->lbah = (1 << 7); 4204 } 4205 4206 ata_qc_set_pc_nbytes(qc); 4207 return 0; 4208 } 4209 4210 /** 4211 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4212 * @qc: Command to be translated 4213 * 4214 * Translate a SCSI variable length CDB to specified commands. 4215 * It checks a service action value in CDB to call corresponding handler. 4216 * 4217 * RETURNS: 4218 * Zero on success, non-zero on failure 4219 * 4220 */ 4221 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4222 { 4223 struct scsi_cmnd *scmd = qc->scsicmd; 4224 const u8 *cdb = scmd->cmnd; 4225 const u16 sa = get_unaligned_be16(&cdb[8]); 4226 4227 /* 4228 * if service action represents a ata pass-thru(32) command, 4229 * then pass it to ata_scsi_pass_thru handler. 4230 */ 4231 if (sa == ATA_32) 4232 return ata_scsi_pass_thru(qc); 4233 4234 /* unsupported service action */ 4235 return 1; 4236 } 4237 4238 /** 4239 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4240 * @dev: ATA device 4241 * @cmd: SCSI command opcode to consider 4242 * 4243 * Look up the SCSI command given, and determine whether the 4244 * SCSI command is to be translated or simulated. 4245 * 4246 * RETURNS: 4247 * Pointer to translation function if possible, %NULL if not. 4248 */ 4249 4250 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4251 { 4252 switch (cmd) { 4253 case READ_6: 4254 case READ_10: 4255 case READ_16: 4256 4257 case WRITE_6: 4258 case WRITE_10: 4259 case WRITE_16: 4260 return ata_scsi_rw_xlat; 4261 4262 case WRITE_SAME_16: 4263 return ata_scsi_write_same_xlat; 4264 4265 case SYNCHRONIZE_CACHE: 4266 case SYNCHRONIZE_CACHE_16: 4267 if (ata_try_flush_cache(dev)) 4268 return ata_scsi_flush_xlat; 4269 break; 4270 4271 case VERIFY: 4272 case VERIFY_16: 4273 return ata_scsi_verify_xlat; 4274 4275 case ATA_12: 4276 case ATA_16: 4277 return ata_scsi_pass_thru; 4278 4279 case VARIABLE_LENGTH_CMD: 4280 return ata_scsi_var_len_cdb_xlat; 4281 4282 case MODE_SELECT: 4283 case MODE_SELECT_10: 4284 return ata_scsi_mode_select_xlat; 4285 4286 case ZBC_IN: 4287 return ata_scsi_zbc_in_xlat; 4288 4289 case ZBC_OUT: 4290 return ata_scsi_zbc_out_xlat; 4291 4292 case SECURITY_PROTOCOL_IN: 4293 case SECURITY_PROTOCOL_OUT: 4294 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4295 break; 4296 return ata_scsi_security_inout_xlat; 4297 4298 case START_STOP: 4299 return ata_scsi_start_stop_xlat; 4300 } 4301 4302 return NULL; 4303 } 4304 4305 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4306 { 4307 struct ata_port *ap = dev->link->ap; 4308 u8 scsi_op = scmd->cmnd[0]; 4309 ata_xlat_func_t xlat_func; 4310 4311 /* 4312 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4313 * However, this check is done without holding the ap->lock (a libata 4314 * specific lock), so we can have received an error irq since then, 4315 * therefore we must check if EH is pending, while holding ap->lock. 4316 */ 4317 if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) 4318 return SCSI_MLQUEUE_DEVICE_BUSY; 4319 4320 if (unlikely(!scmd->cmd_len)) 4321 goto bad_cdb_len; 4322 4323 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4324 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4325 goto bad_cdb_len; 4326 4327 xlat_func = ata_get_xlat_func(dev, scsi_op); 4328 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4329 /* relay SCSI command to ATAPI device */ 4330 int len = COMMAND_SIZE(scsi_op); 4331 4332 if (unlikely(len > scmd->cmd_len || 4333 len > dev->cdb_len || 4334 scmd->cmd_len > ATAPI_CDB_LEN)) 4335 goto bad_cdb_len; 4336 4337 xlat_func = atapi_xlat; 4338 } else { 4339 /* ATA_16 passthru, treat as an ATA command */ 4340 if (unlikely(scmd->cmd_len > 16)) 4341 goto bad_cdb_len; 4342 4343 xlat_func = ata_get_xlat_func(dev, scsi_op); 4344 } 4345 4346 if (xlat_func) 4347 return ata_scsi_translate(dev, scmd, xlat_func); 4348 4349 ata_scsi_simulate(dev, scmd); 4350 4351 return 0; 4352 4353 bad_cdb_len: 4354 scmd->result = DID_ERROR << 16; 4355 scsi_done(scmd); 4356 return 0; 4357 } 4358 4359 /** 4360 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4361 * @shost: SCSI host of command to be sent 4362 * @cmd: SCSI command to be sent 4363 * 4364 * In some cases, this function translates SCSI commands into 4365 * ATA taskfiles, and queues the taskfiles to be sent to 4366 * hardware. In other cases, this function simulates a 4367 * SCSI device by evaluating and responding to certain 4368 * SCSI commands. This creates the overall effect of 4369 * ATA and ATAPI devices appearing as SCSI devices. 4370 * 4371 * LOCKING: 4372 * ATA host lock 4373 * 4374 * RETURNS: 4375 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4376 * 0 otherwise. 4377 */ 4378 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4379 { 4380 struct ata_port *ap; 4381 struct ata_device *dev; 4382 struct scsi_device *scsidev = cmd->device; 4383 int rc = 0; 4384 unsigned long irq_flags; 4385 4386 ap = ata_shost_to_port(shost); 4387 4388 spin_lock_irqsave(ap->lock, irq_flags); 4389 4390 dev = ata_scsi_find_dev(ap, scsidev); 4391 if (likely(dev)) 4392 rc = __ata_scsi_queuecmd(cmd, dev); 4393 else { 4394 cmd->result = (DID_BAD_TARGET << 16); 4395 scsi_done(cmd); 4396 } 4397 4398 spin_unlock_irqrestore(ap->lock, irq_flags); 4399 4400 return rc; 4401 } 4402 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4403 4404 /** 4405 * ata_scsi_simulate - simulate SCSI command on ATA device 4406 * @dev: the target device 4407 * @cmd: SCSI command being sent to device. 4408 * 4409 * Interprets and directly executes a select list of SCSI commands 4410 * that can be handled internally. 4411 * 4412 * LOCKING: 4413 * spin_lock_irqsave(host lock) 4414 */ 4415 4416 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4417 { 4418 const u8 *scsicmd = cmd->cmnd; 4419 u8 tmp8; 4420 4421 switch(scsicmd[0]) { 4422 case INQUIRY: 4423 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_inquiry); 4424 break; 4425 4426 case MODE_SENSE: 4427 case MODE_SENSE_10: 4428 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_mode_sense); 4429 break; 4430 4431 case READ_CAPACITY: 4432 case SERVICE_ACTION_IN_16: 4433 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_read_cap); 4434 break; 4435 4436 case REPORT_LUNS: 4437 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_report_luns); 4438 break; 4439 4440 case REQUEST_SENSE: 4441 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4442 break; 4443 4444 /* if we reach this, then writeback caching is disabled, 4445 * turning this into a no-op. 4446 */ 4447 case SYNCHRONIZE_CACHE: 4448 case SYNCHRONIZE_CACHE_16: 4449 fallthrough; 4450 4451 /* no-op's, complete with success */ 4452 case REZERO_UNIT: 4453 case SEEK_6: 4454 case SEEK_10: 4455 case TEST_UNIT_READY: 4456 break; 4457 4458 case SEND_DIAGNOSTIC: 4459 tmp8 = scsicmd[1] & ~(1 << 3); 4460 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4461 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4462 break; 4463 4464 case MAINTENANCE_IN: 4465 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_maint_in); 4466 break; 4467 4468 /* all other commands */ 4469 default: 4470 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4471 /* "Invalid command operation code" */ 4472 break; 4473 } 4474 4475 scsi_done(cmd); 4476 } 4477 4478 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4479 { 4480 int i, rc; 4481 4482 for (i = 0; i < host->n_ports; i++) { 4483 struct ata_port *ap = host->ports[i]; 4484 struct Scsi_Host *shost; 4485 4486 rc = -ENOMEM; 4487 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4488 if (!shost) 4489 goto err_alloc; 4490 4491 shost->eh_noresume = 1; 4492 *(struct ata_port **)&shost->hostdata[0] = ap; 4493 ap->scsi_host = shost; 4494 4495 shost->transportt = ata_scsi_transport_template; 4496 shost->unique_id = ap->print_id; 4497 shost->max_id = 16; 4498 shost->max_lun = 1; 4499 shost->max_channel = 1; 4500 shost->max_cmd_len = 32; 4501 4502 /* Schedule policy is determined by ->qc_defer() 4503 * callback and it needs to see every deferred qc. 4504 * Set host_blocked to 1 to prevent SCSI midlayer from 4505 * automatically deferring requests. 4506 */ 4507 shost->max_host_blocked = 1; 4508 4509 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4510 if (rc) 4511 goto err_alloc; 4512 } 4513 4514 return 0; 4515 4516 err_alloc: 4517 while (--i >= 0) { 4518 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4519 4520 /* scsi_host_put() is in ata_devres_release() */ 4521 scsi_remove_host(shost); 4522 } 4523 return rc; 4524 } 4525 4526 #ifdef CONFIG_OF 4527 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4528 { 4529 struct scsi_device *sdev = dev->sdev; 4530 struct device *d = ap->host->dev; 4531 struct device_node *np = d->of_node; 4532 struct device_node *child; 4533 4534 for_each_available_child_of_node(np, child) { 4535 int ret; 4536 u32 val; 4537 4538 ret = of_property_read_u32(child, "reg", &val); 4539 if (ret) 4540 continue; 4541 if (val == dev->devno) { 4542 dev_dbg(d, "found matching device node\n"); 4543 sdev->sdev_gendev.of_node = child; 4544 return; 4545 } 4546 } 4547 } 4548 #else 4549 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4550 { 4551 } 4552 #endif 4553 4554 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4555 { 4556 int tries = 5; 4557 struct ata_device *last_failed_dev = NULL; 4558 struct ata_link *link; 4559 struct ata_device *dev; 4560 4561 repeat: 4562 ata_for_each_link(link, ap, EDGE) { 4563 ata_for_each_dev(dev, link, ENABLED) { 4564 struct scsi_device *sdev; 4565 int channel = 0, id = 0; 4566 4567 if (dev->sdev) 4568 continue; 4569 4570 if (ata_is_host_link(link)) 4571 id = dev->devno; 4572 else 4573 channel = link->pmp; 4574 4575 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4576 NULL); 4577 if (!IS_ERR(sdev)) { 4578 dev->sdev = sdev; 4579 ata_scsi_assign_ofnode(dev, ap); 4580 scsi_device_put(sdev); 4581 } else { 4582 dev->sdev = NULL; 4583 } 4584 } 4585 } 4586 4587 /* If we scanned while EH was in progress or allocation 4588 * failure occurred, scan would have failed silently. Check 4589 * whether all devices are attached. 4590 */ 4591 ata_for_each_link(link, ap, EDGE) { 4592 ata_for_each_dev(dev, link, ENABLED) { 4593 if (!dev->sdev) 4594 goto exit_loop; 4595 } 4596 } 4597 exit_loop: 4598 if (!link) 4599 return; 4600 4601 /* we're missing some SCSI devices */ 4602 if (sync) { 4603 /* If caller requested synchrnous scan && we've made 4604 * any progress, sleep briefly and repeat. 4605 */ 4606 if (dev != last_failed_dev) { 4607 msleep(100); 4608 last_failed_dev = dev; 4609 goto repeat; 4610 } 4611 4612 /* We might be failing to detect boot device, give it 4613 * a few more chances. 4614 */ 4615 if (--tries) { 4616 msleep(100); 4617 goto repeat; 4618 } 4619 4620 ata_port_err(ap, 4621 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4622 } 4623 4624 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4625 round_jiffies_relative(HZ)); 4626 } 4627 4628 /** 4629 * ata_scsi_offline_dev - offline attached SCSI device 4630 * @dev: ATA device to offline attached SCSI device for 4631 * 4632 * This function is called from ata_eh_hotplug() and responsible 4633 * for taking the SCSI device attached to @dev offline. This 4634 * function is called with host lock which protects dev->sdev 4635 * against clearing. 4636 * 4637 * LOCKING: 4638 * spin_lock_irqsave(host lock) 4639 * 4640 * RETURNS: 4641 * 1 if attached SCSI device exists, 0 otherwise. 4642 */ 4643 int ata_scsi_offline_dev(struct ata_device *dev) 4644 { 4645 if (dev->sdev) { 4646 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4647 return 1; 4648 } 4649 return 0; 4650 } 4651 4652 /** 4653 * ata_scsi_remove_dev - remove attached SCSI device 4654 * @dev: ATA device to remove attached SCSI device for 4655 * 4656 * This function is called from ata_eh_scsi_hotplug() and 4657 * responsible for removing the SCSI device attached to @dev. 4658 * 4659 * LOCKING: 4660 * Kernel thread context (may sleep). 4661 */ 4662 static void ata_scsi_remove_dev(struct ata_device *dev) 4663 { 4664 struct ata_port *ap = dev->link->ap; 4665 struct scsi_device *sdev; 4666 unsigned long flags; 4667 4668 /* Alas, we need to grab scan_mutex to ensure SCSI device 4669 * state doesn't change underneath us and thus 4670 * scsi_device_get() always succeeds. The mutex locking can 4671 * be removed if there is __scsi_device_get() interface which 4672 * increments reference counts regardless of device state. 4673 */ 4674 mutex_lock(&ap->scsi_host->scan_mutex); 4675 spin_lock_irqsave(ap->lock, flags); 4676 4677 /* clearing dev->sdev is protected by host lock */ 4678 sdev = dev->sdev; 4679 dev->sdev = NULL; 4680 4681 if (sdev) { 4682 /* If user initiated unplug races with us, sdev can go 4683 * away underneath us after the host lock and 4684 * scan_mutex are released. Hold onto it. 4685 */ 4686 if (scsi_device_get(sdev) == 0) { 4687 /* The following ensures the attached sdev is 4688 * offline on return from ata_scsi_offline_dev() 4689 * regardless it wins or loses the race 4690 * against this function. 4691 */ 4692 scsi_device_set_state(sdev, SDEV_OFFLINE); 4693 } else { 4694 WARN_ON(1); 4695 sdev = NULL; 4696 } 4697 } 4698 4699 spin_unlock_irqrestore(ap->lock, flags); 4700 mutex_unlock(&ap->scsi_host->scan_mutex); 4701 4702 if (sdev) { 4703 ata_dev_info(dev, "detaching (SCSI %s)\n", 4704 dev_name(&sdev->sdev_gendev)); 4705 4706 scsi_remove_device(sdev); 4707 scsi_device_put(sdev); 4708 } 4709 } 4710 4711 static void ata_scsi_handle_link_detach(struct ata_link *link) 4712 { 4713 struct ata_port *ap = link->ap; 4714 struct ata_device *dev; 4715 4716 ata_for_each_dev(dev, link, ALL) { 4717 unsigned long flags; 4718 4719 spin_lock_irqsave(ap->lock, flags); 4720 if (!(dev->flags & ATA_DFLAG_DETACHED)) { 4721 spin_unlock_irqrestore(ap->lock, flags); 4722 continue; 4723 } 4724 4725 dev->flags &= ~ATA_DFLAG_DETACHED; 4726 spin_unlock_irqrestore(ap->lock, flags); 4727 4728 ata_scsi_remove_dev(dev); 4729 } 4730 } 4731 4732 /** 4733 * ata_scsi_media_change_notify - send media change event 4734 * @dev: Pointer to the disk device with media change event 4735 * 4736 * Tell the block layer to send a media change notification 4737 * event. 4738 * 4739 * LOCKING: 4740 * spin_lock_irqsave(host lock) 4741 */ 4742 void ata_scsi_media_change_notify(struct ata_device *dev) 4743 { 4744 if (dev->sdev) 4745 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4746 GFP_ATOMIC); 4747 } 4748 4749 /** 4750 * ata_scsi_hotplug - SCSI part of hotplug 4751 * @work: Pointer to ATA port to perform SCSI hotplug on 4752 * 4753 * Perform SCSI part of hotplug. It's executed from a separate 4754 * workqueue after EH completes. This is necessary because SCSI 4755 * hot plugging requires working EH and hot unplugging is 4756 * synchronized with hot plugging with a mutex. 4757 * 4758 * LOCKING: 4759 * Kernel thread context (may sleep). 4760 */ 4761 void ata_scsi_hotplug(struct work_struct *work) 4762 { 4763 struct ata_port *ap = 4764 container_of(work, struct ata_port, hotplug_task.work); 4765 int i; 4766 4767 if (ap->pflags & ATA_PFLAG_UNLOADING) 4768 return; 4769 4770 mutex_lock(&ap->scsi_scan_mutex); 4771 4772 /* Unplug detached devices. We cannot use link iterator here 4773 * because PMP links have to be scanned even if PMP is 4774 * currently not attached. Iterate manually. 4775 */ 4776 ata_scsi_handle_link_detach(&ap->link); 4777 if (ap->pmp_link) 4778 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4779 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4780 4781 /* scan for new ones */ 4782 ata_scsi_scan_host(ap, 0); 4783 4784 mutex_unlock(&ap->scsi_scan_mutex); 4785 } 4786 4787 /** 4788 * ata_scsi_user_scan - indication for user-initiated bus scan 4789 * @shost: SCSI host to scan 4790 * @channel: Channel to scan 4791 * @id: ID to scan 4792 * @lun: LUN to scan 4793 * 4794 * This function is called when user explicitly requests bus 4795 * scan. Set probe pending flag and invoke EH. 4796 * 4797 * LOCKING: 4798 * SCSI layer (we don't care) 4799 * 4800 * RETURNS: 4801 * Zero. 4802 */ 4803 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4804 unsigned int id, u64 lun) 4805 { 4806 struct ata_port *ap = ata_shost_to_port(shost); 4807 unsigned long flags; 4808 int devno, rc = 0; 4809 4810 if (lun != SCAN_WILD_CARD && lun) 4811 return -EINVAL; 4812 4813 if (!sata_pmp_attached(ap)) { 4814 if (channel != SCAN_WILD_CARD && channel) 4815 return -EINVAL; 4816 devno = id; 4817 } else { 4818 if (id != SCAN_WILD_CARD && id) 4819 return -EINVAL; 4820 devno = channel; 4821 } 4822 4823 spin_lock_irqsave(ap->lock, flags); 4824 4825 if (devno == SCAN_WILD_CARD) { 4826 struct ata_link *link; 4827 4828 ata_for_each_link(link, ap, EDGE) { 4829 struct ata_eh_info *ehi = &link->eh_info; 4830 ehi->probe_mask |= ATA_ALL_DEVICES; 4831 ehi->action |= ATA_EH_RESET; 4832 } 4833 } else { 4834 struct ata_device *dev = ata_find_dev(ap, devno); 4835 4836 if (dev) { 4837 struct ata_eh_info *ehi = &dev->link->eh_info; 4838 ehi->probe_mask |= 1 << dev->devno; 4839 ehi->action |= ATA_EH_RESET; 4840 } else 4841 rc = -EINVAL; 4842 } 4843 4844 if (rc == 0) { 4845 ata_port_schedule_eh(ap); 4846 spin_unlock_irqrestore(ap->lock, flags); 4847 ata_port_wait_eh(ap); 4848 } else 4849 spin_unlock_irqrestore(ap->lock, flags); 4850 4851 return rc; 4852 } 4853 4854 /** 4855 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4856 * @work: Pointer to ATA port to perform scsi_rescan_device() 4857 * 4858 * After ATA pass thru (SAT) commands are executed successfully, 4859 * libata need to propagate the changes to SCSI layer. 4860 * 4861 * LOCKING: 4862 * Kernel thread context (may sleep). 4863 */ 4864 void ata_scsi_dev_rescan(struct work_struct *work) 4865 { 4866 struct ata_port *ap = 4867 container_of(work, struct ata_port, scsi_rescan_task.work); 4868 struct ata_link *link; 4869 struct ata_device *dev; 4870 unsigned long flags; 4871 bool do_resume; 4872 int ret = 0; 4873 4874 mutex_lock(&ap->scsi_scan_mutex); 4875 spin_lock_irqsave(ap->lock, flags); 4876 4877 ata_for_each_link(link, ap, EDGE) { 4878 ata_for_each_dev(dev, link, ENABLED) { 4879 struct scsi_device *sdev = dev->sdev; 4880 4881 /* 4882 * If the port was suspended before this was scheduled, 4883 * bail out. 4884 */ 4885 if (ap->pflags & ATA_PFLAG_SUSPENDED) 4886 goto unlock_ap; 4887 4888 if (!sdev) 4889 continue; 4890 if (scsi_device_get(sdev)) 4891 continue; 4892 4893 do_resume = dev->flags & ATA_DFLAG_RESUMING; 4894 4895 spin_unlock_irqrestore(ap->lock, flags); 4896 if (do_resume) { 4897 ret = scsi_resume_device(sdev); 4898 if (ret == -EWOULDBLOCK) 4899 goto unlock_scan; 4900 dev->flags &= ~ATA_DFLAG_RESUMING; 4901 } 4902 ret = scsi_rescan_device(sdev); 4903 scsi_device_put(sdev); 4904 spin_lock_irqsave(ap->lock, flags); 4905 4906 if (ret) 4907 goto unlock_ap; 4908 } 4909 } 4910 4911 unlock_ap: 4912 spin_unlock_irqrestore(ap->lock, flags); 4913 unlock_scan: 4914 mutex_unlock(&ap->scsi_scan_mutex); 4915 4916 /* Reschedule with a delay if scsi_rescan_device() returned an error */ 4917 if (ret) 4918 schedule_delayed_work(&ap->scsi_rescan_task, 4919 msecs_to_jiffies(5)); 4920 } 4921