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 static void ata_scsi_set_sense_information(struct ata_queued_cmd *qc) 220 { 221 u64 information; 222 223 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 224 ata_dev_dbg(qc->dev, 225 "missing result TF: can't set INFORMATION sense field\n"); 226 return; 227 } 228 229 information = ata_tf_read_block(&qc->result_tf, qc->dev); 230 if (information == U64_MAX) 231 return; 232 233 scsi_set_sense_information(qc->scsicmd->sense_buffer, 234 SCSI_SENSE_BUFFERSIZE, information); 235 } 236 237 /** 238 * ata_scsi_set_passthru_sense_fields - Set ATA fields in sense buffer 239 * @qc: ATA PASS-THROUGH command. 240 * 241 * Populates "ATA Status Return sense data descriptor" / "Fixed format 242 * sense data" with ATA taskfile fields. 243 * 244 * LOCKING: 245 * None. 246 */ 247 static void ata_scsi_set_passthru_sense_fields(struct ata_queued_cmd *qc) 248 { 249 struct ata_device *dev = qc->dev; 250 struct scsi_cmnd *cmd = qc->scsicmd; 251 struct ata_taskfile *tf = &qc->result_tf; 252 unsigned char *sb = cmd->sense_buffer; 253 254 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 255 ata_dev_dbg(dev, 256 "missing result TF: can't set ATA PT sense fields\n"); 257 return; 258 } 259 260 if ((sb[0] & 0x7f) >= 0x72) { 261 unsigned char *desc; 262 u8 len; 263 264 /* descriptor format */ 265 len = sb[7]; 266 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 267 if (!desc) { 268 if (SCSI_SENSE_BUFFERSIZE < len + 14) 269 return; 270 sb[7] = len + 14; 271 desc = sb + 8 + len; 272 } 273 desc[0] = 9; 274 desc[1] = 12; 275 /* 276 * Copy registers into sense buffer. 277 */ 278 desc[2] = 0x00; 279 desc[3] = tf->error; 280 desc[5] = tf->nsect; 281 desc[7] = tf->lbal; 282 desc[9] = tf->lbam; 283 desc[11] = tf->lbah; 284 desc[12] = tf->device; 285 desc[13] = tf->status; 286 287 /* 288 * Fill in Extend bit, and the high order bytes 289 * if applicable. 290 */ 291 if (tf->flags & ATA_TFLAG_LBA48) { 292 desc[2] |= 0x01; 293 desc[4] = tf->hob_nsect; 294 desc[6] = tf->hob_lbal; 295 desc[8] = tf->hob_lbam; 296 desc[10] = tf->hob_lbah; 297 } 298 } else { 299 /* Fixed sense format */ 300 sb[0] |= 0x80; 301 sb[3] = tf->error; 302 sb[4] = tf->status; 303 sb[5] = tf->device; 304 sb[6] = tf->nsect; 305 if (tf->flags & ATA_TFLAG_LBA48) { 306 sb[8] |= 0x80; 307 if (tf->hob_nsect) 308 sb[8] |= 0x40; 309 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 310 sb[8] |= 0x20; 311 } 312 sb[9] = tf->lbal; 313 sb[10] = tf->lbam; 314 sb[11] = tf->lbah; 315 } 316 } 317 318 static void ata_scsi_set_invalid_field(struct ata_device *dev, 319 struct scsi_cmnd *cmd, u16 field, u8 bit) 320 { 321 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 322 /* "Invalid field in CDB" */ 323 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 324 field, bit, 1); 325 } 326 327 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 328 struct scsi_cmnd *cmd, u16 field) 329 { 330 /* "Invalid field in parameter list" */ 331 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 332 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 333 field, 0xff, 0); 334 } 335 336 static struct attribute *ata_common_sdev_attrs[] = { 337 &dev_attr_unload_heads.attr, 338 NULL 339 }; 340 341 static const struct attribute_group ata_common_sdev_attr_group = { 342 .attrs = ata_common_sdev_attrs 343 }; 344 345 const struct attribute_group *ata_common_sdev_groups[] = { 346 &ata_common_sdev_attr_group, 347 NULL 348 }; 349 EXPORT_SYMBOL_GPL(ata_common_sdev_groups); 350 351 /** 352 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 353 * @sdev: SCSI device for which BIOS geometry is to be determined 354 * @bdev: block device associated with @sdev 355 * @capacity: capacity of SCSI device 356 * @geom: location to which geometry will be output 357 * 358 * Generic bios head/sector/cylinder calculator 359 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 360 * mapping. Some situations may arise where the disk is not 361 * bootable if this is not used. 362 * 363 * LOCKING: 364 * Defined by the SCSI layer. We don't really care. 365 * 366 * RETURNS: 367 * Zero. 368 */ 369 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 370 sector_t capacity, int geom[]) 371 { 372 geom[0] = 255; 373 geom[1] = 63; 374 sector_div(capacity, 255*63); 375 geom[2] = capacity; 376 377 return 0; 378 } 379 EXPORT_SYMBOL_GPL(ata_std_bios_param); 380 381 /** 382 * ata_scsi_unlock_native_capacity - unlock native capacity 383 * @sdev: SCSI device to adjust device capacity for 384 * 385 * This function is called if a partition on @sdev extends beyond 386 * the end of the device. It requests EH to unlock HPA. 387 * 388 * LOCKING: 389 * Defined by the SCSI layer. Might sleep. 390 */ 391 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 392 { 393 struct ata_port *ap = ata_shost_to_port(sdev->host); 394 struct ata_device *dev; 395 unsigned long flags; 396 397 spin_lock_irqsave(ap->lock, flags); 398 399 dev = ata_scsi_find_dev(ap, sdev); 400 if (dev && dev->n_sectors < dev->n_native_sectors) { 401 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 402 dev->link->eh_info.action |= ATA_EH_RESET; 403 ata_port_schedule_eh(ap); 404 } 405 406 spin_unlock_irqrestore(ap->lock, flags); 407 ata_port_wait_eh(ap); 408 } 409 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 410 411 /** 412 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 413 * @ap: target port 414 * @sdev: SCSI device to get identify data for 415 * @arg: User buffer area for identify data 416 * 417 * LOCKING: 418 * Defined by the SCSI layer. We don't really care. 419 * 420 * RETURNS: 421 * Zero on success, negative errno on error. 422 */ 423 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 424 void __user *arg) 425 { 426 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 427 u16 __user *dst = arg; 428 char buf[40]; 429 430 if (!dev) 431 return -ENOMSG; 432 433 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 434 return -EFAULT; 435 436 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 437 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 438 return -EFAULT; 439 440 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 441 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 442 return -EFAULT; 443 444 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 445 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 446 return -EFAULT; 447 448 return 0; 449 } 450 451 /** 452 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 453 * @scsidev: Device to which we are issuing command 454 * @arg: User provided data for issuing command 455 * 456 * LOCKING: 457 * Defined by the SCSI layer. We don't really care. 458 * 459 * RETURNS: 460 * Zero on success, negative errno on error. 461 */ 462 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 463 { 464 int rc = 0; 465 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 466 u8 scsi_cmd[MAX_COMMAND_SIZE]; 467 u8 args[4], *argbuf = NULL; 468 int argsize = 0; 469 struct scsi_sense_hdr sshdr; 470 const struct scsi_exec_args exec_args = { 471 .sshdr = &sshdr, 472 .sense = sensebuf, 473 .sense_len = sizeof(sensebuf), 474 }; 475 int cmd_result; 476 477 if (arg == NULL) 478 return -EINVAL; 479 480 if (copy_from_user(args, arg, sizeof(args))) 481 return -EFAULT; 482 483 memset(sensebuf, 0, sizeof(sensebuf)); 484 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 485 486 if (args[3]) { 487 argsize = ATA_SECT_SIZE * args[3]; 488 argbuf = kmalloc(argsize, GFP_KERNEL); 489 if (argbuf == NULL) { 490 rc = -ENOMEM; 491 goto error; 492 } 493 494 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 495 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 496 block count in sector count field */ 497 } else { 498 scsi_cmd[1] = (3 << 1); /* Non-data */ 499 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 500 } 501 502 scsi_cmd[0] = ATA_16; 503 504 scsi_cmd[4] = args[2]; 505 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 506 scsi_cmd[6] = args[3]; 507 scsi_cmd[8] = args[1]; 508 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 509 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 510 } else { 511 scsi_cmd[6] = args[1]; 512 } 513 scsi_cmd[14] = args[0]; 514 515 /* Good values for timeout and retries? Values below 516 from scsi_ioctl_send_command() for default case... */ 517 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, argbuf, 518 argsize, 10 * HZ, 5, &exec_args); 519 if (cmd_result < 0) { 520 rc = cmd_result; 521 goto error; 522 } 523 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 524 u8 *desc = sensebuf + 8; 525 526 /* If we set cc then ATA pass-through will cause a 527 * check condition even if no error. Filter that. */ 528 if (scsi_status_is_check_condition(cmd_result)) { 529 if (sshdr.sense_key == RECOVERED_ERROR && 530 sshdr.asc == 0 && sshdr.ascq == 0x1d) 531 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 532 } 533 534 /* Send userspace a few ATA registers (same as drivers/ide) */ 535 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 536 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 537 args[0] = desc[13]; /* status */ 538 args[1] = desc[3]; /* error */ 539 args[2] = desc[5]; /* sector count (0:7) */ 540 if (copy_to_user(arg, args, sizeof(args))) 541 rc = -EFAULT; 542 } 543 } 544 545 546 if (cmd_result) { 547 rc = -EIO; 548 goto error; 549 } 550 551 if ((argbuf) 552 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 553 rc = -EFAULT; 554 error: 555 kfree(argbuf); 556 return rc; 557 } 558 559 /** 560 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 561 * @scsidev: Device to which we are issuing command 562 * @arg: User provided data for issuing command 563 * 564 * LOCKING: 565 * Defined by the SCSI layer. We don't really care. 566 * 567 * RETURNS: 568 * Zero on success, negative errno on error. 569 */ 570 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 571 { 572 int rc = 0; 573 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 574 u8 scsi_cmd[MAX_COMMAND_SIZE]; 575 u8 args[7]; 576 struct scsi_sense_hdr sshdr; 577 int cmd_result; 578 const struct scsi_exec_args exec_args = { 579 .sshdr = &sshdr, 580 .sense = sensebuf, 581 .sense_len = sizeof(sensebuf), 582 }; 583 584 if (arg == NULL) 585 return -EINVAL; 586 587 if (copy_from_user(args, arg, sizeof(args))) 588 return -EFAULT; 589 590 memset(sensebuf, 0, sizeof(sensebuf)); 591 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 592 scsi_cmd[0] = ATA_16; 593 scsi_cmd[1] = (3 << 1); /* Non-data */ 594 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 595 scsi_cmd[4] = args[1]; 596 scsi_cmd[6] = args[2]; 597 scsi_cmd[8] = args[3]; 598 scsi_cmd[10] = args[4]; 599 scsi_cmd[12] = args[5]; 600 scsi_cmd[13] = args[6] & 0x4f; 601 scsi_cmd[14] = args[0]; 602 603 /* Good values for timeout and retries? Values below 604 from scsi_ioctl_send_command() for default case... */ 605 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, NULL, 606 0, 10 * HZ, 5, &exec_args); 607 if (cmd_result < 0) { 608 rc = cmd_result; 609 goto error; 610 } 611 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 612 u8 *desc = sensebuf + 8; 613 614 /* If we set cc then ATA pass-through will cause a 615 * check condition even if no error. Filter that. */ 616 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 617 if (sshdr.sense_key == RECOVERED_ERROR && 618 sshdr.asc == 0 && sshdr.ascq == 0x1d) 619 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 620 } 621 622 /* Send userspace ATA registers */ 623 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 624 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 625 args[0] = desc[13]; /* status */ 626 args[1] = desc[3]; /* error */ 627 args[2] = desc[5]; /* sector count (0:7) */ 628 args[3] = desc[7]; /* lbal */ 629 args[4] = desc[9]; /* lbam */ 630 args[5] = desc[11]; /* lbah */ 631 args[6] = desc[12]; /* select */ 632 if (copy_to_user(arg, args, sizeof(args))) 633 rc = -EFAULT; 634 } 635 } 636 637 if (cmd_result) { 638 rc = -EIO; 639 goto error; 640 } 641 642 error: 643 return rc; 644 } 645 646 static bool ata_ioc32(struct ata_port *ap) 647 { 648 if (ap->flags & ATA_FLAG_PIO_DMA) 649 return true; 650 if (ap->pflags & ATA_PFLAG_PIO32) 651 return true; 652 return false; 653 } 654 655 /* 656 * This handles both native and compat commands, so anything added 657 * here must have a compatible argument, or check in_compat_syscall() 658 */ 659 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 660 unsigned int cmd, void __user *arg) 661 { 662 unsigned long val; 663 int rc = -EINVAL; 664 unsigned long flags; 665 666 switch (cmd) { 667 case HDIO_GET_32BIT: 668 spin_lock_irqsave(ap->lock, flags); 669 val = ata_ioc32(ap); 670 spin_unlock_irqrestore(ap->lock, flags); 671 #ifdef CONFIG_COMPAT 672 if (in_compat_syscall()) 673 return put_user(val, (compat_ulong_t __user *)arg); 674 #endif 675 return put_user(val, (unsigned long __user *)arg); 676 677 case HDIO_SET_32BIT: 678 val = (unsigned long) arg; 679 rc = 0; 680 spin_lock_irqsave(ap->lock, flags); 681 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 682 if (val) 683 ap->pflags |= ATA_PFLAG_PIO32; 684 else 685 ap->pflags &= ~ATA_PFLAG_PIO32; 686 } else { 687 if (val != ata_ioc32(ap)) 688 rc = -EINVAL; 689 } 690 spin_unlock_irqrestore(ap->lock, flags); 691 return rc; 692 693 case HDIO_GET_IDENTITY: 694 return ata_get_identity(ap, scsidev, arg); 695 696 case HDIO_DRIVE_CMD: 697 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 698 return -EACCES; 699 return ata_cmd_ioctl(scsidev, arg); 700 701 case HDIO_DRIVE_TASK: 702 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 703 return -EACCES; 704 return ata_task_ioctl(scsidev, arg); 705 706 default: 707 rc = -ENOTTY; 708 break; 709 } 710 711 return rc; 712 } 713 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 714 715 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 716 void __user *arg) 717 { 718 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 719 scsidev, cmd, arg); 720 } 721 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 722 723 /** 724 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 725 * @dev: ATA device to which the new command is attached 726 * @cmd: SCSI command that originated this ATA command 727 * 728 * Obtain a reference to an unused ata_queued_cmd structure, 729 * which is the basic libata structure representing a single 730 * ATA command sent to the hardware. 731 * 732 * If a command was available, fill in the SCSI-specific 733 * portions of the structure with information on the 734 * current command. 735 * 736 * LOCKING: 737 * spin_lock_irqsave(host lock) 738 * 739 * RETURNS: 740 * Command allocated, or %NULL if none available. 741 */ 742 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 743 struct scsi_cmnd *cmd) 744 { 745 struct ata_port *ap = dev->link->ap; 746 struct ata_queued_cmd *qc; 747 int tag; 748 749 if (unlikely(ata_port_is_frozen(ap))) 750 goto fail; 751 752 if (ap->flags & ATA_FLAG_SAS_HOST) { 753 /* 754 * SAS hosts may queue > ATA_MAX_QUEUE commands so use 755 * unique per-device budget token as a tag. 756 */ 757 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE)) 758 goto fail; 759 tag = cmd->budget_token; 760 } else { 761 tag = scsi_cmd_to_rq(cmd)->tag; 762 } 763 764 qc = __ata_qc_from_tag(ap, tag); 765 qc->tag = qc->hw_tag = tag; 766 qc->ap = ap; 767 qc->dev = dev; 768 769 ata_qc_reinit(qc); 770 771 qc->scsicmd = cmd; 772 qc->scsidone = scsi_done; 773 774 qc->sg = scsi_sglist(cmd); 775 qc->n_elem = scsi_sg_count(cmd); 776 777 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 778 qc->flags |= ATA_QCFLAG_QUIET; 779 780 return qc; 781 782 fail: 783 set_host_byte(cmd, DID_OK); 784 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL); 785 scsi_done(cmd); 786 return NULL; 787 } 788 789 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 790 { 791 struct scsi_cmnd *scmd = qc->scsicmd; 792 793 qc->extrabytes = scmd->extra_len; 794 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 795 } 796 797 /** 798 * ata_to_sense_error - convert ATA error to SCSI error 799 * @drv_stat: value contained in ATA status register 800 * @drv_err: value contained in ATA error register 801 * @sk: the sense key we'll fill out 802 * @asc: the additional sense code we'll fill out 803 * @ascq: the additional sense code qualifier we'll fill out 804 * 805 * Converts an ATA error into a SCSI error. Fill out pointers to 806 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 807 * format sense blocks. 808 * 809 * LOCKING: 810 * spin_lock_irqsave(host lock) 811 */ 812 static void ata_to_sense_error(u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, 813 u8 *ascq) 814 { 815 int i; 816 817 /* Based on the 3ware driver translation table */ 818 static const unsigned char sense_table[][4] = { 819 /* BBD|ECC|ID|MAR */ 820 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 821 // Device busy Aborted command 822 /* BBD|ECC|ID */ 823 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 824 // Device busy Aborted command 825 /* ECC|MC|MARK */ 826 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 827 // Device fault Hardware error 828 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 829 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 830 // Data CRC error SCSI parity error 831 /* MC|ID|ABRT|TRK0|MARK */ 832 {0x37, NOT_READY, 0x04, 0x00}, 833 // Unit offline Not ready 834 /* MCR|MARK */ 835 {0x09, NOT_READY, 0x04, 0x00}, 836 // Unrecovered disk error Not ready 837 /* Bad address mark */ 838 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 839 // Address mark not found for data field 840 /* TRK0 - Track 0 not found */ 841 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 842 // Hardware error 843 /* Abort: 0x04 is not translated here, see below */ 844 /* Media change request */ 845 {0x08, NOT_READY, 0x04, 0x00}, 846 // FIXME: faking offline 847 /* SRV/IDNF - ID not found */ 848 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 849 // Logical address out of range 850 /* MC - Media Changed */ 851 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 852 // Not ready to ready change, medium may have changed 853 /* ECC - Uncorrectable ECC error */ 854 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 855 // Unrecovered read error 856 /* BBD - block marked bad */ 857 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 858 // Block marked bad Medium error, unrecovered read error 859 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 860 }; 861 static const unsigned char stat_table[][4] = { 862 /* Must be first because BUSY means no other bits valid */ 863 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 864 // Busy, fake parity for now 865 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 866 // Device ready, unaligned write command 867 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 868 // Device fault, internal target failure 869 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 870 // Timed out in xfer, fake parity for now 871 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 872 // Recovered ECC error Medium error, recovered 873 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 874 }; 875 876 /* 877 * Is this an error we can process/parse 878 */ 879 if (drv_stat & ATA_BUSY) { 880 drv_err = 0; /* Ignore the err bits, they're invalid */ 881 } 882 883 if (drv_err) { 884 /* Look for drv_err */ 885 for (i = 0; sense_table[i][0] != 0xFF; i++) { 886 /* Look for best matches first */ 887 if ((sense_table[i][0] & drv_err) == 888 sense_table[i][0]) { 889 *sk = sense_table[i][1]; 890 *asc = sense_table[i][2]; 891 *ascq = sense_table[i][3]; 892 return; 893 } 894 } 895 } 896 897 /* 898 * Fall back to interpreting status bits. Note that if the drv_err 899 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 900 * is not descriptive enough. 901 */ 902 for (i = 0; stat_table[i][0] != 0xFF; i++) { 903 if (stat_table[i][0] & drv_stat) { 904 *sk = stat_table[i][1]; 905 *asc = stat_table[i][2]; 906 *ascq = stat_table[i][3]; 907 return; 908 } 909 } 910 911 /* 912 * We need a sensible error return here, which is tricky, and one 913 * that won't cause people to do things like return a disk wrongly. 914 */ 915 *sk = ABORTED_COMMAND; 916 *asc = 0x00; 917 *ascq = 0x00; 918 } 919 920 /* 921 * ata_gen_passthru_sense - Generate check condition sense block. 922 * @qc: Command that completed. 923 * 924 * This function is specific to the ATA pass through commands. 925 * Regardless of whether the command errored or not, return a sense 926 * block. If there was no error, we get the request from an ATA 927 * passthrough command, so we use the following sense data: 928 * sk = RECOVERED ERROR 929 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 930 * 931 * 932 * LOCKING: 933 * None. 934 */ 935 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 936 { 937 struct ata_device *dev = qc->dev; 938 struct scsi_cmnd *cmd = qc->scsicmd; 939 struct ata_taskfile *tf = &qc->result_tf; 940 u8 sense_key, asc, ascq; 941 942 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 943 ata_dev_dbg(dev, 944 "missing result TF: can't generate ATA PT sense data\n"); 945 return; 946 } 947 948 /* 949 * Use ata_to_sense_error() to map status register bits 950 * onto sense key, asc & ascq. 951 */ 952 if (qc->err_mask || 953 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 954 ata_to_sense_error(tf->status, tf->error, 955 &sense_key, &asc, &ascq); 956 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 957 } else { 958 /* 959 * ATA PASS-THROUGH INFORMATION AVAILABLE 960 * 961 * Note: we are supposed to call ata_scsi_set_sense(), which 962 * respects the D_SENSE bit, instead of unconditionally 963 * generating the sense data in descriptor format. However, 964 * because hdparm, hddtemp, and udisks incorrectly assume sense 965 * data in descriptor format, without even looking at the 966 * RESPONSE CODE field in the returned sense data (to see which 967 * format the returned sense data is in), we are stuck with 968 * being bug compatible with older kernels. 969 */ 970 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 971 } 972 } 973 974 /** 975 * ata_gen_ata_sense - generate a SCSI fixed sense block 976 * @qc: Command that we are erroring out 977 * 978 * Generate sense block for a failed ATA command @qc. 979 * 980 * LOCKING: 981 * None. 982 */ 983 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 984 { 985 struct ata_device *dev = qc->dev; 986 struct scsi_cmnd *cmd = qc->scsicmd; 987 struct ata_taskfile *tf = &qc->result_tf; 988 u8 sense_key, asc, ascq; 989 990 if (ata_dev_disabled(dev)) { 991 /* Device disabled after error recovery */ 992 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 993 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 994 return; 995 } 996 997 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 998 ata_dev_dbg(dev, 999 "missing result TF: can't generate sense data\n"); 1000 return; 1001 } 1002 1003 /* Use ata_to_sense_error() to map status register bits 1004 * onto sense key, asc & ascq. 1005 */ 1006 if (qc->err_mask || 1007 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1008 ata_to_sense_error(tf->status, tf->error, 1009 &sense_key, &asc, &ascq); 1010 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1011 } else { 1012 /* Could not decode error */ 1013 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1014 tf->status, qc->err_mask); 1015 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1016 return; 1017 } 1018 } 1019 1020 void ata_scsi_sdev_config(struct scsi_device *sdev) 1021 { 1022 sdev->use_10_for_rw = 1; 1023 sdev->use_10_for_ms = 1; 1024 sdev->no_write_same = 1; 1025 1026 /* Schedule policy is determined by ->qc_defer() callback and 1027 * it needs to see every deferred qc. Set dev_blocked to 1 to 1028 * prevent SCSI midlayer from automatically deferring 1029 * requests. 1030 */ 1031 sdev->max_device_blocked = 1; 1032 } 1033 1034 /** 1035 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1036 * @rq: request to be checked 1037 * 1038 * ATAPI commands which transfer variable length data to host 1039 * might overflow due to application error or hardware bug. This 1040 * function checks whether overflow should be drained and ignored 1041 * for @request. 1042 * 1043 * LOCKING: 1044 * None. 1045 * 1046 * RETURNS: 1047 * 1 if ; otherwise, 0. 1048 */ 1049 bool ata_scsi_dma_need_drain(struct request *rq) 1050 { 1051 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1052 1053 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1054 } 1055 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1056 1057 int ata_scsi_dev_config(struct scsi_device *sdev, struct queue_limits *lim, 1058 struct ata_device *dev) 1059 { 1060 int depth = 1; 1061 1062 if (!ata_id_has_unload(dev->id)) 1063 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1064 1065 /* configure max sectors */ 1066 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1067 lim->max_hw_sectors = dev->max_sectors; 1068 1069 if (dev->class == ATA_DEV_ATAPI) { 1070 sdev->sector_size = ATA_SECT_SIZE; 1071 1072 /* set DMA padding */ 1073 lim->dma_pad_mask = ATA_DMA_PAD_SZ - 1; 1074 1075 /* make room for appending the drain */ 1076 lim->max_segments--; 1077 1078 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1079 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1080 if (!sdev->dma_drain_buf) { 1081 ata_dev_err(dev, "drain buffer allocation failed\n"); 1082 return -ENOMEM; 1083 } 1084 } else { 1085 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1086 1087 /* 1088 * Ask the sd driver to issue START STOP UNIT on runtime suspend 1089 * and resume and shutdown only. For system level suspend/resume, 1090 * devices power state is handled directly by libata EH. 1091 * Given that disks are always spun up on system resume, also 1092 * make sure that the sd driver forces runtime suspended disks 1093 * to be resumed to correctly reflect the power state of the 1094 * device. 1095 */ 1096 sdev->manage_runtime_start_stop = 1; 1097 sdev->manage_shutdown = 1; 1098 sdev->force_runtime_start_on_system_start = 1; 1099 } 1100 1101 /* 1102 * ata_pio_sectors() expects buffer for each sector to not cross 1103 * page boundary. Enforce it by requiring buffers to be sector 1104 * aligned, which works iff sector_size is not larger than 1105 * PAGE_SIZE. ATAPI devices also need the alignment as 1106 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1107 */ 1108 if (sdev->sector_size > PAGE_SIZE) 1109 ata_dev_warn(dev, 1110 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1111 sdev->sector_size); 1112 1113 lim->dma_alignment = sdev->sector_size - 1; 1114 1115 if (dev->flags & ATA_DFLAG_AN) 1116 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1117 1118 if (ata_ncq_supported(dev)) 1119 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1120 depth = min(ATA_MAX_QUEUE, depth); 1121 scsi_change_queue_depth(sdev, depth); 1122 1123 if (dev->flags & ATA_DFLAG_TRUSTED) 1124 sdev->security_supported = 1; 1125 1126 dev->sdev = sdev; 1127 return 0; 1128 } 1129 1130 /** 1131 * ata_scsi_sdev_init - Early setup of SCSI device 1132 * @sdev: SCSI device to examine 1133 * 1134 * This is called from scsi_alloc_sdev() when the scsi device 1135 * associated with an ATA device is scanned on a port. 1136 * 1137 * LOCKING: 1138 * Defined by SCSI layer. We don't really care. 1139 */ 1140 1141 int ata_scsi_sdev_init(struct scsi_device *sdev) 1142 { 1143 struct ata_port *ap = ata_shost_to_port(sdev->host); 1144 struct device_link *link; 1145 1146 ata_scsi_sdev_config(sdev); 1147 1148 /* 1149 * Create a link from the ata_port device to the scsi device to ensure 1150 * that PM does suspend/resume in the correct order: the scsi device is 1151 * consumer (child) and the ata port the supplier (parent). 1152 */ 1153 link = device_link_add(&sdev->sdev_gendev, &ap->tdev, 1154 DL_FLAG_STATELESS | 1155 DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); 1156 if (!link) { 1157 ata_port_err(ap, "Failed to create link to scsi device %s\n", 1158 dev_name(&sdev->sdev_gendev)); 1159 return -ENODEV; 1160 } 1161 1162 return 0; 1163 } 1164 EXPORT_SYMBOL_GPL(ata_scsi_sdev_init); 1165 1166 /** 1167 * ata_scsi_sdev_configure - Set SCSI device attributes 1168 * @sdev: SCSI device to examine 1169 * @lim: queue limits 1170 * 1171 * This is called before we actually start reading 1172 * and writing to the device, to configure certain 1173 * SCSI mid-layer behaviors. 1174 * 1175 * LOCKING: 1176 * Defined by SCSI layer. We don't really care. 1177 */ 1178 1179 int ata_scsi_sdev_configure(struct scsi_device *sdev, struct queue_limits *lim) 1180 { 1181 struct ata_port *ap = ata_shost_to_port(sdev->host); 1182 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1183 1184 if (dev) 1185 return ata_scsi_dev_config(sdev, lim, dev); 1186 1187 return 0; 1188 } 1189 EXPORT_SYMBOL_GPL(ata_scsi_sdev_configure); 1190 1191 /** 1192 * ata_scsi_sdev_destroy - SCSI device is about to be destroyed 1193 * @sdev: SCSI device to be destroyed 1194 * 1195 * @sdev is about to be destroyed for hot/warm unplugging. If 1196 * this unplugging was initiated by libata as indicated by NULL 1197 * dev->sdev, this function doesn't have to do anything. 1198 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1199 * Clear dev->sdev, schedule the device for ATA detach and invoke 1200 * EH. 1201 * 1202 * LOCKING: 1203 * Defined by SCSI layer. We don't really care. 1204 */ 1205 void ata_scsi_sdev_destroy(struct scsi_device *sdev) 1206 { 1207 struct ata_port *ap = ata_shost_to_port(sdev->host); 1208 unsigned long flags; 1209 struct ata_device *dev; 1210 1211 device_link_remove(&sdev->sdev_gendev, &ap->tdev); 1212 1213 spin_lock_irqsave(ap->lock, flags); 1214 dev = __ata_scsi_find_dev(ap, sdev); 1215 if (dev && dev->sdev) { 1216 /* SCSI device already in CANCEL state, no need to offline it */ 1217 dev->sdev = NULL; 1218 dev->flags |= ATA_DFLAG_DETACH; 1219 ata_port_schedule_eh(ap); 1220 } 1221 spin_unlock_irqrestore(ap->lock, flags); 1222 1223 kfree(sdev->dma_drain_buf); 1224 } 1225 EXPORT_SYMBOL_GPL(ata_scsi_sdev_destroy); 1226 1227 /** 1228 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1229 * @qc: Storage for translated ATA taskfile 1230 * 1231 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1232 * (to start). Perhaps these commands should be preceded by 1233 * CHECK POWER MODE to see what power mode the device is already in. 1234 * [See SAT revision 5 at www.t10.org] 1235 * 1236 * LOCKING: 1237 * spin_lock_irqsave(host lock) 1238 * 1239 * RETURNS: 1240 * Zero on success, non-zero on error. 1241 */ 1242 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1243 { 1244 struct scsi_cmnd *scmd = qc->scsicmd; 1245 const u8 *cdb = scmd->cmnd; 1246 u16 fp; 1247 u8 bp = 0xff; 1248 1249 if (scmd->cmd_len < 5) { 1250 fp = 4; 1251 goto invalid_fld; 1252 } 1253 1254 /* LOEJ bit set not supported */ 1255 if (cdb[4] & 0x2) { 1256 fp = 4; 1257 bp = 1; 1258 goto invalid_fld; 1259 } 1260 1261 /* Power conditions not supported */ 1262 if (((cdb[4] >> 4) & 0xf) != 0) { 1263 fp = 4; 1264 bp = 3; 1265 goto invalid_fld; 1266 } 1267 1268 /* Ignore IMMED bit (cdb[1] & 0x1), violates sat-r05 */ 1269 if (!ata_dev_power_init_tf(qc->dev, &qc->tf, cdb[4] & 0x1)) { 1270 ata_scsi_set_sense(qc->dev, scmd, ABORTED_COMMAND, 0, 0); 1271 return 1; 1272 } 1273 1274 /* 1275 * Standby and Idle condition timers could be implemented but that 1276 * would require libata to implement the Power condition mode page 1277 * and allow the user to change it. Changing mode pages requires 1278 * MODE SELECT to be implemented. 1279 */ 1280 1281 return 0; 1282 1283 invalid_fld: 1284 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1285 return 1; 1286 } 1287 1288 /** 1289 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1290 * @qc: Storage for translated ATA taskfile 1291 * 1292 * Sets up an ATA taskfile to issue FLUSH CACHE or 1293 * FLUSH CACHE EXT. 1294 * 1295 * LOCKING: 1296 * spin_lock_irqsave(host lock) 1297 * 1298 * RETURNS: 1299 * Zero on success, non-zero on error. 1300 */ 1301 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1302 { 1303 struct ata_taskfile *tf = &qc->tf; 1304 1305 tf->flags |= ATA_TFLAG_DEVICE; 1306 tf->protocol = ATA_PROT_NODATA; 1307 1308 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1309 tf->command = ATA_CMD_FLUSH_EXT; 1310 else 1311 tf->command = ATA_CMD_FLUSH; 1312 1313 /* flush is critical for IO integrity, consider it an IO command */ 1314 qc->flags |= ATA_QCFLAG_IO; 1315 1316 return 0; 1317 } 1318 1319 /** 1320 * scsi_6_lba_len - Get LBA and transfer length 1321 * @cdb: SCSI command to translate 1322 * 1323 * Calculate LBA and transfer length for 6-byte commands. 1324 * 1325 * RETURNS: 1326 * @plba: the LBA 1327 * @plen: the transfer length 1328 */ 1329 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1330 { 1331 *plba = get_unaligned_be24(&cdb[1]) & 0x1fffff; 1332 *plen = cdb[4]; 1333 } 1334 1335 /** 1336 * scsi_10_lba_len - Get LBA and transfer length 1337 * @cdb: SCSI command to translate 1338 * 1339 * Calculate LBA and transfer length for 10-byte commands. 1340 * 1341 * RETURNS: 1342 * @plba: the LBA 1343 * @plen: the transfer length 1344 */ 1345 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1346 { 1347 *plba = get_unaligned_be32(&cdb[2]); 1348 *plen = get_unaligned_be16(&cdb[7]); 1349 } 1350 1351 /** 1352 * scsi_16_lba_len - Get LBA and transfer length 1353 * @cdb: SCSI command to translate 1354 * 1355 * Calculate LBA and transfer length for 16-byte commands. 1356 * 1357 * RETURNS: 1358 * @plba: the LBA 1359 * @plen: the transfer length 1360 */ 1361 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1362 { 1363 *plba = get_unaligned_be64(&cdb[2]); 1364 *plen = get_unaligned_be32(&cdb[10]); 1365 } 1366 1367 /** 1368 * scsi_dld - Get duration limit descriptor index 1369 * @cdb: SCSI command to translate 1370 * 1371 * Returns the dld bits indicating the index of a command duration limit 1372 * descriptor. 1373 */ 1374 static inline int scsi_dld(const u8 *cdb) 1375 { 1376 return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03); 1377 } 1378 1379 /** 1380 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1381 * @qc: Storage for translated ATA taskfile 1382 * 1383 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1384 * 1385 * LOCKING: 1386 * spin_lock_irqsave(host lock) 1387 * 1388 * RETURNS: 1389 * Zero on success, non-zero on error. 1390 */ 1391 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1392 { 1393 struct scsi_cmnd *scmd = qc->scsicmd; 1394 struct ata_taskfile *tf = &qc->tf; 1395 struct ata_device *dev = qc->dev; 1396 u64 dev_sectors = qc->dev->n_sectors; 1397 const u8 *cdb = scmd->cmnd; 1398 u64 block; 1399 u32 n_block; 1400 u16 fp; 1401 1402 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1403 tf->protocol = ATA_PROT_NODATA; 1404 1405 switch (cdb[0]) { 1406 case VERIFY: 1407 if (scmd->cmd_len < 10) { 1408 fp = 9; 1409 goto invalid_fld; 1410 } 1411 scsi_10_lba_len(cdb, &block, &n_block); 1412 break; 1413 case VERIFY_16: 1414 if (scmd->cmd_len < 16) { 1415 fp = 15; 1416 goto invalid_fld; 1417 } 1418 scsi_16_lba_len(cdb, &block, &n_block); 1419 break; 1420 default: 1421 fp = 0; 1422 goto invalid_fld; 1423 } 1424 1425 if (!n_block) 1426 goto nothing_to_do; 1427 if (block >= dev_sectors) 1428 goto out_of_range; 1429 if ((block + n_block) > dev_sectors) 1430 goto out_of_range; 1431 1432 if (dev->flags & ATA_DFLAG_LBA) { 1433 tf->flags |= ATA_TFLAG_LBA; 1434 1435 if (lba_28_ok(block, n_block)) { 1436 /* use LBA28 */ 1437 tf->command = ATA_CMD_VERIFY; 1438 tf->device |= (block >> 24) & 0xf; 1439 } else if (lba_48_ok(block, n_block)) { 1440 if (!(dev->flags & ATA_DFLAG_LBA48)) 1441 goto out_of_range; 1442 1443 /* use LBA48 */ 1444 tf->flags |= ATA_TFLAG_LBA48; 1445 tf->command = ATA_CMD_VERIFY_EXT; 1446 1447 tf->hob_nsect = (n_block >> 8) & 0xff; 1448 1449 tf->hob_lbah = (block >> 40) & 0xff; 1450 tf->hob_lbam = (block >> 32) & 0xff; 1451 tf->hob_lbal = (block >> 24) & 0xff; 1452 } else 1453 /* request too large even for LBA48 */ 1454 goto out_of_range; 1455 1456 tf->nsect = n_block & 0xff; 1457 1458 tf->lbah = (block >> 16) & 0xff; 1459 tf->lbam = (block >> 8) & 0xff; 1460 tf->lbal = block & 0xff; 1461 1462 tf->device |= ATA_LBA; 1463 } else { 1464 /* CHS */ 1465 u32 sect, head, cyl, track; 1466 1467 if (!lba_28_ok(block, n_block)) 1468 goto out_of_range; 1469 1470 /* Convert LBA to CHS */ 1471 track = (u32)block / dev->sectors; 1472 cyl = track / dev->heads; 1473 head = track % dev->heads; 1474 sect = (u32)block % dev->sectors + 1; 1475 1476 /* Check whether the converted CHS can fit. 1477 Cylinder: 0-65535 1478 Head: 0-15 1479 Sector: 1-255*/ 1480 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1481 goto out_of_range; 1482 1483 tf->command = ATA_CMD_VERIFY; 1484 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1485 tf->lbal = sect; 1486 tf->lbam = cyl; 1487 tf->lbah = cyl >> 8; 1488 tf->device |= head; 1489 } 1490 1491 return 0; 1492 1493 invalid_fld: 1494 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1495 return 1; 1496 1497 out_of_range: 1498 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1499 /* "Logical Block Address out of range" */ 1500 return 1; 1501 1502 nothing_to_do: 1503 scmd->result = SAM_STAT_GOOD; 1504 return 1; 1505 } 1506 1507 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1508 { 1509 struct request *rq = scsi_cmd_to_rq(scmd); 1510 u32 req_blocks; 1511 1512 if (!blk_rq_is_passthrough(rq)) 1513 return true; 1514 1515 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1516 if (n_blocks > req_blocks) 1517 return false; 1518 1519 return true; 1520 } 1521 1522 /** 1523 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1524 * @qc: Storage for translated ATA taskfile 1525 * 1526 * Converts any of six SCSI read/write commands into the 1527 * ATA counterpart, including starting sector (LBA), 1528 * sector count, and taking into account the device's LBA48 1529 * support. 1530 * 1531 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1532 * %WRITE_16 are currently supported. 1533 * 1534 * LOCKING: 1535 * spin_lock_irqsave(host lock) 1536 * 1537 * RETURNS: 1538 * Zero on success, non-zero on error. 1539 */ 1540 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1541 { 1542 struct scsi_cmnd *scmd = qc->scsicmd; 1543 const u8 *cdb = scmd->cmnd; 1544 struct request *rq = scsi_cmd_to_rq(scmd); 1545 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1546 unsigned int tf_flags = 0; 1547 int dld = 0; 1548 u64 block; 1549 u32 n_block; 1550 int rc; 1551 u16 fp = 0; 1552 1553 switch (cdb[0]) { 1554 case WRITE_6: 1555 case WRITE_10: 1556 case WRITE_16: 1557 tf_flags |= ATA_TFLAG_WRITE; 1558 break; 1559 } 1560 1561 /* Calculate the SCSI LBA, transfer length and FUA. */ 1562 switch (cdb[0]) { 1563 case READ_10: 1564 case WRITE_10: 1565 if (unlikely(scmd->cmd_len < 10)) { 1566 fp = 9; 1567 goto invalid_fld; 1568 } 1569 scsi_10_lba_len(cdb, &block, &n_block); 1570 if (cdb[1] & (1 << 3)) 1571 tf_flags |= ATA_TFLAG_FUA; 1572 if (!ata_check_nblocks(scmd, n_block)) 1573 goto invalid_fld; 1574 break; 1575 case READ_6: 1576 case WRITE_6: 1577 if (unlikely(scmd->cmd_len < 6)) { 1578 fp = 5; 1579 goto invalid_fld; 1580 } 1581 scsi_6_lba_len(cdb, &block, &n_block); 1582 1583 /* for 6-byte r/w commands, transfer length 0 1584 * means 256 blocks of data, not 0 block. 1585 */ 1586 if (!n_block) 1587 n_block = 256; 1588 if (!ata_check_nblocks(scmd, n_block)) 1589 goto invalid_fld; 1590 break; 1591 case READ_16: 1592 case WRITE_16: 1593 if (unlikely(scmd->cmd_len < 16)) { 1594 fp = 15; 1595 goto invalid_fld; 1596 } 1597 scsi_16_lba_len(cdb, &block, &n_block); 1598 dld = scsi_dld(cdb); 1599 if (cdb[1] & (1 << 3)) 1600 tf_flags |= ATA_TFLAG_FUA; 1601 if (!ata_check_nblocks(scmd, n_block)) 1602 goto invalid_fld; 1603 break; 1604 default: 1605 fp = 0; 1606 goto invalid_fld; 1607 } 1608 1609 /* Check and compose ATA command */ 1610 if (!n_block) 1611 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1612 * length 0 means transfer 0 block of data. 1613 * However, for ATA R/W commands, sector count 0 means 1614 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1615 * 1616 * WARNING: one or two older ATA drives treat 0 as 0... 1617 */ 1618 goto nothing_to_do; 1619 1620 qc->flags |= ATA_QCFLAG_IO; 1621 qc->nbytes = n_block * scmd->device->sector_size; 1622 1623 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class); 1624 if (likely(rc == 0)) 1625 return 0; 1626 1627 if (rc == -ERANGE) 1628 goto out_of_range; 1629 /* treat all other errors as -EINVAL, fall through */ 1630 invalid_fld: 1631 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1632 return 1; 1633 1634 out_of_range: 1635 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1636 /* "Logical Block Address out of range" */ 1637 return 1; 1638 1639 nothing_to_do: 1640 scmd->result = SAM_STAT_GOOD; 1641 return 1; 1642 } 1643 1644 static void ata_qc_done(struct ata_queued_cmd *qc) 1645 { 1646 struct scsi_cmnd *cmd = qc->scsicmd; 1647 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1648 1649 ata_qc_free(qc); 1650 done(cmd); 1651 } 1652 1653 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1654 { 1655 struct scsi_cmnd *cmd = qc->scsicmd; 1656 u8 *cdb = cmd->cmnd; 1657 bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID; 1658 bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12; 1659 bool is_ck_cond_request = cdb[2] & 0x20; 1660 bool is_error = qc->err_mask != 0; 1661 1662 /* For ATA pass thru (SAT) commands, generate a sense block if 1663 * user mandated it or if there's an error. Note that if we 1664 * generate because the user forced us to [CK_COND=1], a check 1665 * condition is generated and the ATA register values are returned 1666 * whether the command completed successfully or not. If there 1667 * was no error, and CK_COND=1, we use the following sense data: 1668 * sk = RECOVERED ERROR 1669 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1670 */ 1671 if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) { 1672 if (!have_sense) 1673 ata_gen_passthru_sense(qc); 1674 ata_scsi_set_passthru_sense_fields(qc); 1675 if (is_ck_cond_request) 1676 set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); 1677 } else if (is_error) { 1678 if (!have_sense) 1679 ata_gen_ata_sense(qc); 1680 ata_scsi_set_sense_information(qc); 1681 } 1682 1683 ata_qc_done(qc); 1684 } 1685 1686 /** 1687 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1688 * @dev: ATA device to which the command is addressed 1689 * @cmd: SCSI command to execute 1690 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1691 * 1692 * Our ->queuecommand() function has decided that the SCSI 1693 * command issued can be directly translated into an ATA 1694 * command, rather than handled internally. 1695 * 1696 * This function sets up an ata_queued_cmd structure for the 1697 * SCSI command, and sends that ata_queued_cmd to the hardware. 1698 * 1699 * The xlat_func argument (actor) returns 0 if ready to execute 1700 * ATA command, else 1 to finish translation. If 1 is returned 1701 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1702 * to be set reflecting an error condition or clean (early) 1703 * termination. 1704 * 1705 * LOCKING: 1706 * spin_lock_irqsave(host lock) 1707 * 1708 * RETURNS: 1709 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1710 * needs to be deferred. 1711 */ 1712 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1713 ata_xlat_func_t xlat_func) 1714 { 1715 struct ata_port *ap = dev->link->ap; 1716 struct ata_queued_cmd *qc; 1717 int rc; 1718 1719 qc = ata_scsi_qc_new(dev, cmd); 1720 if (!qc) 1721 goto err_mem; 1722 1723 /* data is present; dma-map it */ 1724 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1725 cmd->sc_data_direction == DMA_TO_DEVICE) { 1726 if (unlikely(scsi_bufflen(cmd) < 1)) { 1727 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1728 goto err_did; 1729 } 1730 1731 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1732 1733 qc->dma_dir = cmd->sc_data_direction; 1734 } 1735 1736 qc->complete_fn = ata_scsi_qc_complete; 1737 1738 if (xlat_func(qc)) 1739 goto early_finish; 1740 1741 if (ap->ops->qc_defer) { 1742 if ((rc = ap->ops->qc_defer(qc))) 1743 goto defer; 1744 } 1745 1746 /* select device, send command to hardware */ 1747 ata_qc_issue(qc); 1748 1749 return 0; 1750 1751 early_finish: 1752 ata_qc_free(qc); 1753 scsi_done(cmd); 1754 return 0; 1755 1756 err_did: 1757 ata_qc_free(qc); 1758 cmd->result = (DID_ERROR << 16); 1759 scsi_done(cmd); 1760 err_mem: 1761 return 0; 1762 1763 defer: 1764 ata_qc_free(qc); 1765 if (rc == ATA_DEFER_LINK) 1766 return SCSI_MLQUEUE_DEVICE_BUSY; 1767 else 1768 return SCSI_MLQUEUE_HOST_BUSY; 1769 } 1770 1771 /** 1772 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1773 * @dev: Target device. 1774 * @cmd: SCSI command of interest. 1775 * @actor: Callback hook for desired SCSI command simulator 1776 * 1777 * Takes care of the hard work of simulating a SCSI command... 1778 * Mapping the response buffer, calling the command's handler, 1779 * and handling the handler's return value. This return value 1780 * indicates whether the handler wishes the SCSI command to be 1781 * completed successfully (0), or not (in which case cmd->result 1782 * and sense buffer are assumed to be set). 1783 * 1784 * LOCKING: 1785 * spin_lock_irqsave(host lock) 1786 */ 1787 static void ata_scsi_rbuf_fill(struct ata_device *dev, struct scsi_cmnd *cmd, 1788 unsigned int (*actor)(struct ata_device *dev, 1789 struct scsi_cmnd *cmd, u8 *rbuf)) 1790 { 1791 unsigned long flags; 1792 unsigned int len; 1793 1794 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1795 1796 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1797 len = actor(dev, cmd, ata_scsi_rbuf); 1798 if (len) { 1799 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1800 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1801 cmd->result = SAM_STAT_GOOD; 1802 if (scsi_bufflen(cmd) > len) 1803 scsi_set_resid(cmd, scsi_bufflen(cmd) - len); 1804 } 1805 1806 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1807 } 1808 1809 /** 1810 * ata_scsiop_inq_std - Simulate standard INQUIRY command 1811 * @dev: Target device. 1812 * @cmd: SCSI command of interest. 1813 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1814 * 1815 * Returns standard device identification data associated 1816 * with non-VPD INQUIRY command output. 1817 * 1818 * LOCKING: 1819 * spin_lock_irqsave(host lock) 1820 */ 1821 static unsigned int ata_scsiop_inq_std(struct ata_device *dev, 1822 struct scsi_cmnd *cmd, u8 *rbuf) 1823 { 1824 static const u8 versions[] = { 1825 0x00, 1826 0x60, /* SAM-3 (no version claimed) */ 1827 1828 0x03, 1829 0x20, /* SBC-2 (no version claimed) */ 1830 1831 0x03, 1832 0x00 /* SPC-3 (no version claimed) */ 1833 }; 1834 static const u8 versions_zbc[] = { 1835 0x00, 1836 0xA0, /* SAM-5 (no version claimed) */ 1837 1838 0x06, 1839 0x00, /* SBC-4 (no version claimed) */ 1840 1841 0x05, 1842 0xC0, /* SPC-5 (no version claimed) */ 1843 1844 0x60, 1845 0x24, /* ZBC r05 */ 1846 }; 1847 1848 u8 hdr[] = { 1849 TYPE_DISK, 1850 0, 1851 0x5, /* claim SPC-3 version compatibility */ 1852 2, 1853 95 - 4, 1854 0, 1855 0, 1856 2 1857 }; 1858 1859 /* 1860 * Set the SCSI Removable Media Bit (RMB) if the ATA removable media 1861 * device bit (obsolete since ATA-8 ACS) is set. 1862 */ 1863 if (ata_id_removable(dev->id)) 1864 hdr[1] |= (1 << 7); 1865 1866 if (dev->class == ATA_DEV_ZAC) { 1867 hdr[0] = TYPE_ZBC; 1868 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1869 } 1870 1871 if (dev->flags & ATA_DFLAG_CDL) 1872 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 1873 1874 memcpy(rbuf, hdr, sizeof(hdr)); 1875 memcpy(&rbuf[8], "ATA ", 8); 1876 ata_id_string(dev->id, &rbuf[16], ATA_ID_PROD, 16); 1877 1878 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1879 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1880 if (strncmp(&rbuf[32], " ", 4) == 0) 1881 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV, 4); 1882 1883 if (rbuf[32] == 0 || rbuf[32] == ' ') 1884 memcpy(&rbuf[32], "n/a ", 4); 1885 1886 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 1887 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1888 else 1889 memcpy(rbuf + 58, versions, sizeof(versions)); 1890 1891 /* 1892 * Include all 8 possible version descriptors, even if not all of 1893 * them are popoulated. 1894 */ 1895 return 96; 1896 } 1897 1898 /** 1899 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1900 * @dev: Target device. 1901 * @cmd: SCSI command of interest. 1902 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1903 * 1904 * Returns list of inquiry VPD pages available. 1905 * 1906 * LOCKING: 1907 * spin_lock_irqsave(host lock) 1908 */ 1909 static unsigned int ata_scsiop_inq_00(struct ata_device *dev, 1910 struct scsi_cmnd *cmd, u8 *rbuf) 1911 { 1912 int i, num_pages = 0; 1913 static const u8 pages[] = { 1914 0x00, /* page 0x00, this page */ 1915 0x80, /* page 0x80, unit serial no page */ 1916 0x83, /* page 0x83, device ident page */ 1917 0x89, /* page 0x89, ata info page */ 1918 0xb0, /* page 0xb0, block limits page */ 1919 0xb1, /* page 0xb1, block device characteristics page */ 1920 0xb2, /* page 0xb2, thin provisioning page */ 1921 0xb6, /* page 0xb6, zoned block device characteristics */ 1922 0xb9, /* page 0xb9, concurrent positioning ranges */ 1923 }; 1924 1925 for (i = 0; i < sizeof(pages); i++) { 1926 if (pages[i] == 0xb6 && !ata_dev_is_zac(dev)) 1927 continue; 1928 rbuf[num_pages + 4] = pages[i]; 1929 num_pages++; 1930 } 1931 rbuf[3] = num_pages; /* number of supported VPD pages */ 1932 1933 return get_unaligned_be16(&rbuf[2]) + 4; 1934 } 1935 1936 /** 1937 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1938 * @dev: Target device. 1939 * @cmd: SCSI command of interest. 1940 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1941 * 1942 * Returns ATA device serial number. 1943 * 1944 * LOCKING: 1945 * spin_lock_irqsave(host lock) 1946 */ 1947 static unsigned int ata_scsiop_inq_80(struct ata_device *dev, 1948 struct scsi_cmnd *cmd, u8 *rbuf) 1949 { 1950 static const u8 hdr[] = { 1951 0, 1952 0x80, /* this page code */ 1953 0, 1954 ATA_ID_SERNO_LEN, /* page len */ 1955 }; 1956 1957 memcpy(rbuf, hdr, sizeof(hdr)); 1958 ata_id_string(dev->id, (unsigned char *) &rbuf[4], 1959 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1960 1961 return get_unaligned_be16(&rbuf[2]) + 4; 1962 } 1963 1964 /** 1965 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1966 * @dev: Target device. 1967 * @cmd: SCSI command of interest. 1968 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1969 * 1970 * Yields two logical unit device identification designators: 1971 * - vendor specific ASCII containing the ATA serial number 1972 * - SAT defined "t10 vendor id based" containing ASCII vendor 1973 * name ("ATA "), model and serial numbers. 1974 * 1975 * LOCKING: 1976 * spin_lock_irqsave(host lock) 1977 */ 1978 static unsigned int ata_scsiop_inq_83(struct ata_device *dev, 1979 struct scsi_cmnd *cmd, u8 *rbuf) 1980 { 1981 const int sat_model_serial_desc_len = 68; 1982 int num; 1983 1984 rbuf[1] = 0x83; /* this page code */ 1985 num = 4; 1986 1987 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1988 rbuf[num + 0] = 2; 1989 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1990 num += 4; 1991 ata_id_string(dev->id, (unsigned char *) rbuf + num, 1992 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1993 num += ATA_ID_SERNO_LEN; 1994 1995 /* SAT defined lu model and serial numbers descriptor */ 1996 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 1997 rbuf[num + 0] = 2; 1998 rbuf[num + 1] = 1; 1999 rbuf[num + 3] = sat_model_serial_desc_len; 2000 num += 4; 2001 memcpy(rbuf + num, "ATA ", 8); 2002 num += 8; 2003 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2004 ATA_ID_PROD_LEN); 2005 num += ATA_ID_PROD_LEN; 2006 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2007 ATA_ID_SERNO_LEN); 2008 num += ATA_ID_SERNO_LEN; 2009 2010 if (ata_id_has_wwn(dev->id)) { 2011 /* SAT defined lu world wide name */ 2012 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2013 rbuf[num + 0] = 1; 2014 rbuf[num + 1] = 3; 2015 rbuf[num + 3] = ATA_ID_WWN_LEN; 2016 num += 4; 2017 ata_id_string(dev->id, (unsigned char *) rbuf + num, 2018 ATA_ID_WWN, ATA_ID_WWN_LEN); 2019 num += ATA_ID_WWN_LEN; 2020 } 2021 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2022 2023 return get_unaligned_be16(&rbuf[2]) + 4; 2024 } 2025 2026 /** 2027 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2028 * @dev: Target device. 2029 * @cmd: SCSI command of interest. 2030 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2031 * 2032 * Yields SAT-specified ATA VPD page. 2033 * 2034 * LOCKING: 2035 * spin_lock_irqsave(host lock) 2036 */ 2037 static unsigned int ata_scsiop_inq_89(struct ata_device *dev, 2038 struct scsi_cmnd *cmd, u8 *rbuf) 2039 { 2040 rbuf[1] = 0x89; /* our page code */ 2041 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2042 rbuf[3] = (0x238 & 0xff); 2043 2044 memcpy(&rbuf[8], "linux ", 8); 2045 memcpy(&rbuf[16], "libata ", 16); 2046 memcpy(&rbuf[32], DRV_VERSION, 4); 2047 2048 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2049 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2050 /* TODO: PMP? */ 2051 2052 /* we don't store the ATA device signature, so we fake it */ 2053 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2054 rbuf[40] = 0x1; 2055 rbuf[48] = 0x1; 2056 2057 rbuf[56] = ATA_CMD_ID_ATA; 2058 2059 memcpy(&rbuf[60], &dev->id[0], 512); 2060 2061 return get_unaligned_be16(&rbuf[2]) + 4; 2062 } 2063 2064 /** 2065 * ata_scsiop_inq_b0 - Simulate INQUIRY VPD page B0, Block Limits 2066 * @dev: Target device. 2067 * @cmd: SCSI command of interest. 2068 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2069 * 2070 * Return data for the VPD page B0h (Block Limits). 2071 * 2072 * LOCKING: 2073 * spin_lock_irqsave(host lock) 2074 */ 2075 static unsigned int ata_scsiop_inq_b0(struct ata_device *dev, 2076 struct scsi_cmnd *cmd, u8 *rbuf) 2077 { 2078 u16 min_io_sectors; 2079 2080 rbuf[1] = 0xb0; 2081 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2082 2083 /* 2084 * Optimal transfer length granularity. 2085 * 2086 * This is always one physical block, but for disks with a smaller 2087 * logical than physical sector size we need to figure out what the 2088 * latter is. 2089 */ 2090 min_io_sectors = 1 << ata_id_log2_per_physical_sector(dev->id); 2091 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2092 2093 /* 2094 * Optimal unmap granularity. 2095 * 2096 * The ATA spec doesn't even know about a granularity or alignment 2097 * for the TRIM command. We can leave away most of the unmap related 2098 * VPD page entries, but we have specifify a granularity to signal 2099 * that we support some form of unmap - in thise case via WRITE SAME 2100 * with the unmap bit set. 2101 */ 2102 if (ata_id_has_trim(dev->id)) { 2103 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2104 2105 if (dev->quirks & ATA_QUIRK_MAX_TRIM_128M) 2106 max_blocks = 128 << (20 - SECTOR_SHIFT); 2107 2108 put_unaligned_be64(max_blocks, &rbuf[36]); 2109 put_unaligned_be32(1, &rbuf[28]); 2110 } 2111 2112 return get_unaligned_be16(&rbuf[2]) + 4; 2113 } 2114 2115 /** 2116 * ata_scsiop_inq_b1 - Simulate INQUIRY VPD page B1, Block Device 2117 * Characteristics 2118 * @dev: Target device. 2119 * @cmd: SCSI command of interest. 2120 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2121 * 2122 * Return data for the VPD page B1h (Block Device Characteristics). 2123 * 2124 * LOCKING: 2125 * spin_lock_irqsave(host lock) 2126 */ 2127 static unsigned int ata_scsiop_inq_b1(struct ata_device *dev, 2128 struct scsi_cmnd *cmd, u8 *rbuf) 2129 { 2130 int form_factor = ata_id_form_factor(dev->id); 2131 int media_rotation_rate = ata_id_rotation_rate(dev->id); 2132 u8 zoned = ata_id_zoned_cap(dev->id); 2133 2134 rbuf[1] = 0xb1; 2135 rbuf[3] = 0x3c; 2136 rbuf[4] = media_rotation_rate >> 8; 2137 rbuf[5] = media_rotation_rate; 2138 rbuf[7] = form_factor; 2139 if (zoned) 2140 rbuf[8] = (zoned << 4); 2141 2142 return get_unaligned_be16(&rbuf[2]) + 4; 2143 } 2144 2145 /** 2146 * ata_scsiop_inq_b2 - Simulate INQUIRY VPD page B2, Logical Block 2147 * Provisioning 2148 * @dev: Target device. 2149 * @cmd: SCSI command of interest. 2150 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2151 * 2152 * Return data for the VPD page B2h (Logical Block Provisioning). 2153 * 2154 * LOCKING: 2155 * spin_lock_irqsave(host lock) 2156 */ 2157 static unsigned int ata_scsiop_inq_b2(struct ata_device *dev, 2158 struct scsi_cmnd *cmd, u8 *rbuf) 2159 { 2160 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2161 rbuf[1] = 0xb2; 2162 rbuf[3] = 0x4; 2163 rbuf[5] = 1 << 6; /* TPWS */ 2164 2165 return get_unaligned_be16(&rbuf[2]) + 4; 2166 } 2167 2168 /** 2169 * ata_scsiop_inq_b6 - Simulate INQUIRY VPD page B6, Zoned Block Device 2170 * Characteristics 2171 * @dev: Target device. 2172 * @cmd: SCSI command of interest. 2173 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2174 * 2175 * Return data for the VPD page B2h (Zoned Block Device Characteristics). 2176 * 2177 * LOCKING: 2178 * spin_lock_irqsave(host lock) 2179 */ 2180 static unsigned int ata_scsiop_inq_b6(struct ata_device *dev, 2181 struct scsi_cmnd *cmd, u8 *rbuf) 2182 { 2183 if (!ata_dev_is_zac(dev)) { 2184 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2185 return 0; 2186 } 2187 2188 /* 2189 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2190 */ 2191 rbuf[1] = 0xb6; 2192 rbuf[3] = 0x3C; 2193 2194 /* 2195 * URSWRZ bit is only meaningful for host-managed ZAC drives 2196 */ 2197 if (dev->zac_zoned_cap & 1) 2198 rbuf[4] |= 1; 2199 put_unaligned_be32(dev->zac_zones_optimal_open, &rbuf[8]); 2200 put_unaligned_be32(dev->zac_zones_optimal_nonseq, &rbuf[12]); 2201 put_unaligned_be32(dev->zac_zones_max_open, &rbuf[16]); 2202 2203 return get_unaligned_be16(&rbuf[2]) + 4; 2204 } 2205 2206 /** 2207 * ata_scsiop_inq_b9 - Simulate INQUIRY VPD page B9, Concurrent Positioning 2208 * Ranges 2209 * @dev: Target device. 2210 * @cmd: SCSI command of interest. 2211 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2212 * 2213 * Return data for the VPD page B9h (Concurrent Positioning Ranges). 2214 * 2215 * LOCKING: 2216 * spin_lock_irqsave(host lock) 2217 */ 2218 static unsigned int ata_scsiop_inq_b9(struct ata_device *dev, 2219 struct scsi_cmnd *cmd, u8 *rbuf) 2220 { 2221 struct ata_cpr_log *cpr_log = dev->cpr_log; 2222 u8 *desc = &rbuf[64]; 2223 int i; 2224 2225 if (!cpr_log) { 2226 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2227 return 0; 2228 } 2229 2230 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2231 rbuf[1] = 0xb9; 2232 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2233 2234 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2235 desc[0] = cpr_log->cpr[i].num; 2236 desc[1] = cpr_log->cpr[i].num_storage_elements; 2237 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2238 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2239 } 2240 2241 return get_unaligned_be16(&rbuf[2]) + 4; 2242 } 2243 2244 /** 2245 * ata_scsiop_inquiry - Simulate INQUIRY command 2246 * @dev: Target device. 2247 * @cmd: SCSI command of interest. 2248 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2249 * 2250 * Returns data associated with an INQUIRY command output. 2251 * 2252 * LOCKING: 2253 * spin_lock_irqsave(host lock) 2254 */ 2255 static unsigned int ata_scsiop_inquiry(struct ata_device *dev, 2256 struct scsi_cmnd *cmd, u8 *rbuf) 2257 { 2258 const u8 *scsicmd = cmd->cmnd; 2259 2260 /* is CmdDt set? */ 2261 if (scsicmd[1] & 2) { 2262 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2263 return 0; 2264 } 2265 2266 /* Is EVPD clear? */ 2267 if ((scsicmd[1] & 1) == 0) 2268 return ata_scsiop_inq_std(dev, cmd, rbuf); 2269 2270 switch (scsicmd[2]) { 2271 case 0x00: 2272 return ata_scsiop_inq_00(dev, cmd, rbuf); 2273 case 0x80: 2274 return ata_scsiop_inq_80(dev, cmd, rbuf); 2275 case 0x83: 2276 return ata_scsiop_inq_83(dev, cmd, rbuf); 2277 case 0x89: 2278 return ata_scsiop_inq_89(dev, cmd, rbuf); 2279 case 0xb0: 2280 return ata_scsiop_inq_b0(dev, cmd, rbuf); 2281 case 0xb1: 2282 return ata_scsiop_inq_b1(dev, cmd, rbuf); 2283 case 0xb2: 2284 return ata_scsiop_inq_b2(dev, cmd, rbuf); 2285 case 0xb6: 2286 return ata_scsiop_inq_b6(dev, cmd, rbuf); 2287 case 0xb9: 2288 return ata_scsiop_inq_b9(dev, cmd, rbuf); 2289 default: 2290 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2291 return 0; 2292 } 2293 } 2294 2295 /** 2296 * modecpy - Prepare response for MODE SENSE 2297 * @dest: output buffer 2298 * @src: data being copied 2299 * @n: length of mode page 2300 * @changeable: whether changeable parameters are requested 2301 * 2302 * Generate a generic MODE SENSE page for either current or changeable 2303 * parameters. 2304 * 2305 * LOCKING: 2306 * None. 2307 */ 2308 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2309 { 2310 if (changeable) { 2311 memcpy(dest, src, 2); 2312 memset(dest + 2, 0, n - 2); 2313 } else { 2314 memcpy(dest, src, n); 2315 } 2316 } 2317 2318 /** 2319 * ata_msense_caching - Simulate MODE SENSE caching info page 2320 * @id: device IDENTIFY data 2321 * @buf: output buffer 2322 * @changeable: whether changeable parameters are requested 2323 * 2324 * Generate a caching info page, which conditionally indicates 2325 * write caching to the SCSI layer, depending on device 2326 * capabilities. 2327 * 2328 * LOCKING: 2329 * None. 2330 */ 2331 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2332 { 2333 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2334 if (changeable) { 2335 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2336 } else { 2337 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2338 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2339 } 2340 return sizeof(def_cache_mpage); 2341 } 2342 2343 /* 2344 * Simulate MODE SENSE control mode page, sub-page 0. 2345 */ 2346 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2347 bool changeable) 2348 { 2349 modecpy(buf, def_control_mpage, 2350 sizeof(def_control_mpage), changeable); 2351 if (changeable) { 2352 /* ata_mselect_control() */ 2353 buf[2] |= (1 << 2); 2354 } else { 2355 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2356 2357 /* descriptor format sense data */ 2358 buf[2] |= (d_sense << 2); 2359 } 2360 2361 return sizeof(def_control_mpage); 2362 } 2363 2364 /* 2365 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2366 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2367 * only, take care of overflows. 2368 */ 2369 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2370 { 2371 u32 limit = get_unaligned_le32(buf); 2372 2373 return min_t(u32, limit / 10000, 65535); 2374 } 2375 2376 /* 2377 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2378 * (command duration limits T2A and T2B mode pages). 2379 */ 2380 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2381 u8 spg) 2382 { 2383 u8 *b, *cdl, *desc; 2384 u32 policy; 2385 int i; 2386 2387 if (!(dev->flags & ATA_DFLAG_CDL) || !dev->cdl) 2388 return 0; 2389 2390 cdl = dev->cdl->desc_log_buf; 2391 2392 /* 2393 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2394 * are a header. The PAGE LENGTH field is the size of the page 2395 * excluding the header. 2396 */ 2397 buf[0] = CONTROL_MPAGE; 2398 buf[1] = spg; 2399 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2400 if (spg == CDL_T2A_SUB_MPAGE) { 2401 /* 2402 * Read descriptors map to the T2A page: 2403 * set perf_vs_duration_guidleine. 2404 */ 2405 buf[7] = (cdl[0] & 0x03) << 4; 2406 desc = cdl + 64; 2407 } else { 2408 /* Write descriptors map to the T2B page */ 2409 desc = cdl + 288; 2410 } 2411 2412 /* Fill the T2 page descriptors */ 2413 b = &buf[8]; 2414 policy = get_unaligned_le32(&cdl[0]); 2415 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2416 /* t2cdlunits: fixed to 10ms */ 2417 b[0] = 0x0a; 2418 2419 /* Max inactive time and its policy */ 2420 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2421 b[6] = ((policy >> 8) & 0x0f) << 4; 2422 2423 /* Max active time and its policy */ 2424 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2425 b[6] |= (policy >> 4) & 0x0f; 2426 2427 /* Command duration guideline and its policy */ 2428 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2429 b[14] = policy & 0x0f; 2430 } 2431 2432 return CDL_T2_SUB_MPAGE_LEN; 2433 } 2434 2435 /* 2436 * Simulate MODE SENSE control mode page, sub-page f2h 2437 * (ATA feature control mode page). 2438 */ 2439 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2440 u8 *buf) 2441 { 2442 /* PS=0, SPF=1 */ 2443 buf[0] = CONTROL_MPAGE | (1 << 6); 2444 buf[1] = ATA_FEATURE_SUB_MPAGE; 2445 2446 /* 2447 * The first four bytes of ATA Feature Control mode page are a header. 2448 * The PAGE LENGTH field is the size of the page excluding the header. 2449 */ 2450 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2451 2452 if (dev->flags & ATA_DFLAG_CDL_ENABLED) 2453 buf[4] = 0x02; /* T2A and T2B pages enabled */ 2454 else 2455 buf[4] = 0; 2456 2457 return ATA_FEATURE_SUB_MPAGE_LEN; 2458 } 2459 2460 /** 2461 * ata_msense_control - Simulate MODE SENSE control mode page 2462 * @dev: ATA device of interest 2463 * @buf: output buffer 2464 * @spg: sub-page code 2465 * @changeable: whether changeable parameters are requested 2466 * 2467 * Generate a generic MODE SENSE control mode page. 2468 * 2469 * LOCKING: 2470 * None. 2471 */ 2472 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2473 u8 spg, bool changeable) 2474 { 2475 unsigned int n; 2476 2477 switch (spg) { 2478 case 0: 2479 return ata_msense_control_spg0(dev, buf, changeable); 2480 case CDL_T2A_SUB_MPAGE: 2481 case CDL_T2B_SUB_MPAGE: 2482 return ata_msense_control_spgt2(dev, buf, spg); 2483 case ATA_FEATURE_SUB_MPAGE: 2484 return ata_msense_control_ata_feature(dev, buf); 2485 case ALL_SUB_MPAGES: 2486 n = ata_msense_control_spg0(dev, buf, changeable); 2487 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2488 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2B_SUB_MPAGE); 2489 n += ata_msense_control_ata_feature(dev, buf + n); 2490 return n; 2491 default: 2492 return 0; 2493 } 2494 } 2495 2496 /** 2497 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2498 * @buf: output buffer 2499 * @changeable: whether changeable parameters are requested 2500 * 2501 * Generate a generic MODE SENSE r/w error recovery page. 2502 * 2503 * LOCKING: 2504 * None. 2505 */ 2506 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2507 { 2508 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2509 changeable); 2510 return sizeof(def_rw_recovery_mpage); 2511 } 2512 2513 /** 2514 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2515 * @dev: Target device. 2516 * @cmd: SCSI command of interest. 2517 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2518 * 2519 * Simulate MODE SENSE commands. Assume this is invoked for direct 2520 * access devices (e.g. disks) only. There should be no block 2521 * descriptor for other device types. 2522 * 2523 * LOCKING: 2524 * spin_lock_irqsave(host lock) 2525 */ 2526 static unsigned int ata_scsiop_mode_sense(struct ata_device *dev, 2527 struct scsi_cmnd *cmd, u8 *rbuf) 2528 { 2529 u8 *scsicmd = cmd->cmnd, *p = rbuf; 2530 static const u8 sat_blk_desc[] = { 2531 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2532 0, 2533 0, 0x2, 0x0 /* block length: 512 bytes */ 2534 }; 2535 u8 pg, spg; 2536 unsigned int ebd, page_control, six_byte; 2537 u8 dpofua = 0, bp = 0xff; 2538 u16 fp; 2539 2540 six_byte = (scsicmd[0] == MODE_SENSE); 2541 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2542 /* 2543 * LLBA bit in msense(10) ignored (compliant) 2544 */ 2545 2546 page_control = scsicmd[2] >> 6; 2547 switch (page_control) { 2548 case 0: /* current */ 2549 case 1: /* changeable */ 2550 case 2: /* defaults */ 2551 break; /* supported */ 2552 case 3: /* saved */ 2553 goto saving_not_supp; 2554 default: 2555 fp = 2; 2556 bp = 6; 2557 goto invalid_fld; 2558 } 2559 2560 if (six_byte) 2561 p += 4 + (ebd ? 8 : 0); 2562 else 2563 p += 8 + (ebd ? 8 : 0); 2564 2565 pg = scsicmd[2] & 0x3f; 2566 spg = scsicmd[3]; 2567 2568 /* 2569 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2570 * the control page. 2571 */ 2572 if (spg) { 2573 switch (spg) { 2574 case ALL_SUB_MPAGES: 2575 break; 2576 case CDL_T2A_SUB_MPAGE: 2577 case CDL_T2B_SUB_MPAGE: 2578 case ATA_FEATURE_SUB_MPAGE: 2579 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2580 break; 2581 fallthrough; 2582 default: 2583 fp = 3; 2584 goto invalid_fld; 2585 } 2586 } 2587 2588 switch(pg) { 2589 case RW_RECOVERY_MPAGE: 2590 p += ata_msense_rw_recovery(p, page_control == 1); 2591 break; 2592 2593 case CACHE_MPAGE: 2594 p += ata_msense_caching(dev->id, p, page_control == 1); 2595 break; 2596 2597 case CONTROL_MPAGE: 2598 p += ata_msense_control(dev, p, spg, page_control == 1); 2599 break; 2600 2601 case ALL_MPAGES: 2602 p += ata_msense_rw_recovery(p, page_control == 1); 2603 p += ata_msense_caching(dev->id, p, page_control == 1); 2604 p += ata_msense_control(dev, p, spg, page_control == 1); 2605 break; 2606 2607 default: /* invalid page code */ 2608 fp = 2; 2609 goto invalid_fld; 2610 } 2611 2612 if (dev->flags & ATA_DFLAG_FUA) 2613 dpofua = 1 << 4; 2614 2615 if (six_byte) { 2616 rbuf[0] = p - rbuf - 1; 2617 rbuf[2] |= dpofua; 2618 if (ebd) { 2619 rbuf[3] = sizeof(sat_blk_desc); 2620 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2621 } 2622 2623 return rbuf[0] + 1; 2624 } 2625 2626 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2627 rbuf[3] |= dpofua; 2628 if (ebd) { 2629 rbuf[7] = sizeof(sat_blk_desc); 2630 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2631 } 2632 2633 return get_unaligned_be16(&rbuf[0]) + 2; 2634 2635 invalid_fld: 2636 ata_scsi_set_invalid_field(dev, cmd, fp, bp); 2637 return 0; 2638 2639 saving_not_supp: 2640 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2641 /* "Saving parameters not supported" */ 2642 return 0; 2643 } 2644 2645 /** 2646 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2647 * @dev: Target device. 2648 * @cmd: SCSI command of interest. 2649 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2650 * 2651 * Simulate READ CAPACITY commands. 2652 * 2653 * LOCKING: 2654 * None. 2655 */ 2656 static unsigned int ata_scsiop_read_cap(struct ata_device *dev, 2657 struct scsi_cmnd *cmd, u8 *rbuf) 2658 { 2659 u8 *scsicmd = cmd->cmnd; 2660 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2661 u32 sector_size; /* physical sector size in bytes */ 2662 u8 log2_per_phys; 2663 u16 lowest_aligned; 2664 2665 sector_size = ata_id_logical_sector_size(dev->id); 2666 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2667 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2668 2669 if (scsicmd[0] == READ_CAPACITY) { 2670 if (last_lba >= 0xffffffffULL) 2671 last_lba = 0xffffffff; 2672 2673 /* sector count, 32-bit */ 2674 rbuf[0] = last_lba >> (8 * 3); 2675 rbuf[1] = last_lba >> (8 * 2); 2676 rbuf[2] = last_lba >> (8 * 1); 2677 rbuf[3] = last_lba; 2678 2679 /* sector size */ 2680 rbuf[4] = sector_size >> (8 * 3); 2681 rbuf[5] = sector_size >> (8 * 2); 2682 rbuf[6] = sector_size >> (8 * 1); 2683 rbuf[7] = sector_size; 2684 2685 return 8; 2686 } 2687 2688 /* 2689 * READ CAPACITY 16 command is defined as a service action 2690 * (SERVICE_ACTION_IN_16 command). 2691 */ 2692 if (scsicmd[0] != SERVICE_ACTION_IN_16 || 2693 (scsicmd[1] & 0x1f) != SAI_READ_CAPACITY_16) { 2694 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2695 return 0; 2696 } 2697 2698 /* sector count, 64-bit */ 2699 rbuf[0] = last_lba >> (8 * 7); 2700 rbuf[1] = last_lba >> (8 * 6); 2701 rbuf[2] = last_lba >> (8 * 5); 2702 rbuf[3] = last_lba >> (8 * 4); 2703 rbuf[4] = last_lba >> (8 * 3); 2704 rbuf[5] = last_lba >> (8 * 2); 2705 rbuf[6] = last_lba >> (8 * 1); 2706 rbuf[7] = last_lba; 2707 2708 /* sector size */ 2709 rbuf[ 8] = sector_size >> (8 * 3); 2710 rbuf[ 9] = sector_size >> (8 * 2); 2711 rbuf[10] = sector_size >> (8 * 1); 2712 rbuf[11] = sector_size; 2713 2714 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 2715 rbuf[12] = (1 << 4); /* RC_BASIS */ 2716 rbuf[13] = log2_per_phys; 2717 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2718 rbuf[15] = lowest_aligned; 2719 2720 if (ata_id_has_trim(dev->id) && !(dev->quirks & ATA_QUIRK_NOTRIM)) { 2721 rbuf[14] |= 0x80; /* LBPME */ 2722 2723 if (ata_id_has_zero_after_trim(dev->id) && 2724 dev->quirks & ATA_QUIRK_ZERO_AFTER_TRIM) { 2725 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2726 rbuf[14] |= 0x40; /* LBPRZ */ 2727 } 2728 } 2729 2730 return 16; 2731 } 2732 2733 /** 2734 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2735 * @dev: Target device. 2736 * @cmd: SCSI command of interest. 2737 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2738 * 2739 * Simulate REPORT LUNS command. 2740 * 2741 * LOCKING: 2742 * spin_lock_irqsave(host lock) 2743 */ 2744 static unsigned int ata_scsiop_report_luns(struct ata_device *dev, 2745 struct scsi_cmnd *cmd, u8 *rbuf) 2746 { 2747 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2748 2749 return 16; 2750 } 2751 2752 /* 2753 * ATAPI devices typically report zero for their SCSI version, and sometimes 2754 * deviate from the spec WRT response data format. If SCSI version is 2755 * reported as zero like normal, then we make the following fixups: 2756 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2757 * modern device. 2758 * 2) Ensure response data format / ATAPI information are always correct. 2759 */ 2760 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2761 { 2762 u8 buf[4]; 2763 2764 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2765 if (buf[2] == 0) { 2766 buf[2] = 0x5; 2767 buf[3] = 0x32; 2768 } 2769 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2770 } 2771 2772 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2773 { 2774 struct scsi_cmnd *cmd = qc->scsicmd; 2775 unsigned int err_mask = qc->err_mask; 2776 2777 /* handle completion from EH */ 2778 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2779 2780 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2781 ata_gen_passthru_sense(qc); 2782 2783 /* SCSI EH automatically locks door if sdev->locked is 2784 * set. Sometimes door lock request continues to 2785 * fail, for example, when no media is present. This 2786 * creates a loop - SCSI EH issues door lock which 2787 * fails and gets invoked again to acquire sense data 2788 * for the failed command. 2789 * 2790 * If door lock fails, always clear sdev->locked to 2791 * avoid this infinite loop. 2792 * 2793 * This may happen before SCSI scan is complete. Make 2794 * sure qc->dev->sdev isn't NULL before dereferencing. 2795 */ 2796 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2797 qc->dev->sdev->locked = 0; 2798 2799 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2800 ata_qc_done(qc); 2801 return; 2802 } 2803 2804 /* successful completion path */ 2805 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2806 atapi_fixup_inquiry(cmd); 2807 cmd->result = SAM_STAT_GOOD; 2808 2809 ata_qc_done(qc); 2810 } 2811 /** 2812 * atapi_xlat - Initialize PACKET taskfile 2813 * @qc: command structure to be initialized 2814 * 2815 * LOCKING: 2816 * spin_lock_irqsave(host lock) 2817 * 2818 * RETURNS: 2819 * Zero on success, non-zero on failure. 2820 */ 2821 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2822 { 2823 struct scsi_cmnd *scmd = qc->scsicmd; 2824 struct ata_device *dev = qc->dev; 2825 int nodata = (scmd->sc_data_direction == DMA_NONE); 2826 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2827 unsigned int nbytes; 2828 2829 memset(qc->cdb, 0, dev->cdb_len); 2830 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2831 2832 qc->complete_fn = atapi_qc_complete; 2833 2834 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2835 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2836 qc->tf.flags |= ATA_TFLAG_WRITE; 2837 } 2838 2839 qc->tf.command = ATA_CMD_PACKET; 2840 ata_qc_set_pc_nbytes(qc); 2841 2842 /* check whether ATAPI DMA is safe */ 2843 if (!nodata && !using_pio && atapi_check_dma(qc)) 2844 using_pio = 1; 2845 2846 /* Some controller variants snoop this value for Packet 2847 * transfers to do state machine and FIFO management. Thus we 2848 * want to set it properly, and for DMA where it is 2849 * effectively meaningless. 2850 */ 2851 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2852 2853 /* Most ATAPI devices which honor transfer chunk size don't 2854 * behave according to the spec when odd chunk size which 2855 * matches the transfer length is specified. If the number of 2856 * bytes to transfer is 2n+1. According to the spec, what 2857 * should happen is to indicate that 2n+1 is going to be 2858 * transferred and transfer 2n+2 bytes where the last byte is 2859 * padding. 2860 * 2861 * In practice, this doesn't happen. ATAPI devices first 2862 * indicate and transfer 2n bytes and then indicate and 2863 * transfer 2 bytes where the last byte is padding. 2864 * 2865 * This inconsistency confuses several controllers which 2866 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2867 * These controllers use actual number of transferred bytes to 2868 * update DMA pointer and transfer of 4n+2 bytes make those 2869 * controller push DMA pointer by 4n+4 bytes because SATA data 2870 * FISes are aligned to 4 bytes. This causes data corruption 2871 * and buffer overrun. 2872 * 2873 * Always setting nbytes to even number solves this problem 2874 * because then ATAPI devices don't have to split data at 2n 2875 * boundaries. 2876 */ 2877 if (nbytes & 0x1) 2878 nbytes++; 2879 2880 qc->tf.lbam = (nbytes & 0xFF); 2881 qc->tf.lbah = (nbytes >> 8); 2882 2883 if (nodata) 2884 qc->tf.protocol = ATAPI_PROT_NODATA; 2885 else if (using_pio) 2886 qc->tf.protocol = ATAPI_PROT_PIO; 2887 else { 2888 /* DMA data xfer */ 2889 qc->tf.protocol = ATAPI_PROT_DMA; 2890 qc->tf.feature |= ATAPI_PKT_DMA; 2891 2892 if ((dev->flags & ATA_DFLAG_DMADIR) && 2893 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2894 /* some SATA bridges need us to indicate data xfer direction */ 2895 qc->tf.feature |= ATAPI_DMADIR; 2896 } 2897 2898 2899 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2900 as ATAPI tape drives don't get this right otherwise */ 2901 return 0; 2902 } 2903 2904 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 2905 { 2906 /* 2907 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 2908 * or 2 (IDE master + slave case). However, the former case includes 2909 * libsas hosted devices which are numbered per scsi host, leading 2910 * to devno potentially being larger than 0 but with each struct 2911 * ata_device having its own struct ata_port and struct ata_link. 2912 * To accommodate these, ignore devno and always use device number 0. 2913 */ 2914 if (likely(!sata_pmp_attached(ap))) { 2915 int link_max_devices = ata_link_max_devices(&ap->link); 2916 2917 if (link_max_devices == 1) 2918 return &ap->link.device[0]; 2919 2920 if (devno < link_max_devices) 2921 return &ap->link.device[devno]; 2922 2923 return NULL; 2924 } 2925 2926 /* 2927 * For PMP-attached devices, the device number corresponds to C 2928 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 2929 * for the device. 2930 */ 2931 if (devno < ap->nr_pmp_links) 2932 return &ap->pmp_link[devno].device[0]; 2933 2934 return NULL; 2935 } 2936 2937 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2938 const struct scsi_device *scsidev) 2939 { 2940 int devno; 2941 2942 /* skip commands not addressed to targets we simulate */ 2943 if (!sata_pmp_attached(ap)) { 2944 if (unlikely(scsidev->channel || scsidev->lun)) 2945 return NULL; 2946 devno = scsidev->id; 2947 } else { 2948 if (unlikely(scsidev->id || scsidev->lun)) 2949 return NULL; 2950 devno = scsidev->channel; 2951 } 2952 2953 return ata_find_dev(ap, devno); 2954 } 2955 2956 /** 2957 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2958 * @ap: ATA port to which the device is attached 2959 * @scsidev: SCSI device from which we derive the ATA device 2960 * 2961 * Given various information provided in struct scsi_cmnd, 2962 * map that onto an ATA bus, and using that mapping 2963 * determine which ata_device is associated with the 2964 * SCSI command to be sent. 2965 * 2966 * LOCKING: 2967 * spin_lock_irqsave(host lock) 2968 * 2969 * RETURNS: 2970 * Associated ATA device, or %NULL if not found. 2971 */ 2972 struct ata_device * 2973 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2974 { 2975 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2976 2977 if (unlikely(!dev || !ata_dev_enabled(dev))) 2978 return NULL; 2979 2980 return dev; 2981 } 2982 2983 /* 2984 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2985 * @byte1: Byte 1 from pass-thru CDB. 2986 * 2987 * RETURNS: 2988 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2989 */ 2990 static u8 2991 ata_scsi_map_proto(u8 byte1) 2992 { 2993 switch((byte1 & 0x1e) >> 1) { 2994 case 3: /* Non-data */ 2995 return ATA_PROT_NODATA; 2996 2997 case 6: /* DMA */ 2998 case 10: /* UDMA Data-in */ 2999 case 11: /* UDMA Data-Out */ 3000 return ATA_PROT_DMA; 3001 3002 case 4: /* PIO Data-in */ 3003 case 5: /* PIO Data-out */ 3004 return ATA_PROT_PIO; 3005 3006 case 12: /* FPDMA */ 3007 return ATA_PROT_NCQ; 3008 3009 case 0: /* Hard Reset */ 3010 case 1: /* SRST */ 3011 case 8: /* Device Diagnostic */ 3012 case 9: /* Device Reset */ 3013 case 7: /* DMA Queued */ 3014 case 15: /* Return Response Info */ 3015 default: /* Reserved */ 3016 break; 3017 } 3018 3019 return ATA_PROT_UNKNOWN; 3020 } 3021 3022 /** 3023 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3024 * @qc: command structure to be initialized 3025 * 3026 * Handles either 12, 16, or 32-byte versions of the CDB. 3027 * 3028 * RETURNS: 3029 * Zero on success, non-zero on failure. 3030 */ 3031 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3032 { 3033 struct ata_taskfile *tf = &(qc->tf); 3034 struct scsi_cmnd *scmd = qc->scsicmd; 3035 struct ata_device *dev = qc->dev; 3036 const u8 *cdb = scmd->cmnd; 3037 u16 fp; 3038 u16 cdb_offset = 0; 3039 3040 /* 7Fh variable length cmd means a ata pass-thru(32) */ 3041 if (cdb[0] == VARIABLE_LENGTH_CMD) 3042 cdb_offset = 9; 3043 3044 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 3045 if (tf->protocol == ATA_PROT_UNKNOWN) { 3046 fp = 1; 3047 goto invalid_fld; 3048 } 3049 3050 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 3051 /* 3052 * When T_LENGTH is zero (No data is transferred), dir should 3053 * be DMA_NONE. 3054 */ 3055 if (scmd->sc_data_direction != DMA_NONE) { 3056 fp = 2 + cdb_offset; 3057 goto invalid_fld; 3058 } 3059 3060 if (ata_is_ncq(tf->protocol)) 3061 tf->protocol = ATA_PROT_NCQ_NODATA; 3062 } 3063 3064 /* enable LBA */ 3065 tf->flags |= ATA_TFLAG_LBA; 3066 3067 /* 3068 * 12 and 16 byte CDBs use different offsets to 3069 * provide the various register values. 3070 */ 3071 switch (cdb[0]) { 3072 case ATA_16: 3073 /* 3074 * 16-byte CDB - may contain extended commands. 3075 * 3076 * If that is the case, copy the upper byte register values. 3077 */ 3078 if (cdb[1] & 0x01) { 3079 tf->hob_feature = cdb[3]; 3080 tf->hob_nsect = cdb[5]; 3081 tf->hob_lbal = cdb[7]; 3082 tf->hob_lbam = cdb[9]; 3083 tf->hob_lbah = cdb[11]; 3084 tf->flags |= ATA_TFLAG_LBA48; 3085 } else 3086 tf->flags &= ~ATA_TFLAG_LBA48; 3087 3088 /* 3089 * Always copy low byte, device and command registers. 3090 */ 3091 tf->feature = cdb[4]; 3092 tf->nsect = cdb[6]; 3093 tf->lbal = cdb[8]; 3094 tf->lbam = cdb[10]; 3095 tf->lbah = cdb[12]; 3096 tf->device = cdb[13]; 3097 tf->command = cdb[14]; 3098 break; 3099 case ATA_12: 3100 /* 3101 * 12-byte CDB - incapable of extended commands. 3102 */ 3103 tf->flags &= ~ATA_TFLAG_LBA48; 3104 3105 tf->feature = cdb[3]; 3106 tf->nsect = cdb[4]; 3107 tf->lbal = cdb[5]; 3108 tf->lbam = cdb[6]; 3109 tf->lbah = cdb[7]; 3110 tf->device = cdb[8]; 3111 tf->command = cdb[9]; 3112 break; 3113 default: 3114 /* 3115 * 32-byte CDB - may contain extended command fields. 3116 * 3117 * If that is the case, copy the upper byte register values. 3118 */ 3119 if (cdb[10] & 0x01) { 3120 tf->hob_feature = cdb[20]; 3121 tf->hob_nsect = cdb[22]; 3122 tf->hob_lbal = cdb[16]; 3123 tf->hob_lbam = cdb[15]; 3124 tf->hob_lbah = cdb[14]; 3125 tf->flags |= ATA_TFLAG_LBA48; 3126 } else 3127 tf->flags &= ~ATA_TFLAG_LBA48; 3128 3129 tf->feature = cdb[21]; 3130 tf->nsect = cdb[23]; 3131 tf->lbal = cdb[19]; 3132 tf->lbam = cdb[18]; 3133 tf->lbah = cdb[17]; 3134 tf->device = cdb[24]; 3135 tf->command = cdb[25]; 3136 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3137 break; 3138 } 3139 3140 /* For NCQ commands copy the tag value */ 3141 if (ata_is_ncq(tf->protocol)) 3142 tf->nsect = qc->hw_tag << 3; 3143 3144 /* enforce correct master/slave bit */ 3145 tf->device = dev->devno ? 3146 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3147 3148 switch (tf->command) { 3149 /* READ/WRITE LONG use a non-standard sect_size */ 3150 case ATA_CMD_READ_LONG: 3151 case ATA_CMD_READ_LONG_ONCE: 3152 case ATA_CMD_WRITE_LONG: 3153 case ATA_CMD_WRITE_LONG_ONCE: 3154 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3155 fp = 1; 3156 goto invalid_fld; 3157 } 3158 qc->sect_size = scsi_bufflen(scmd); 3159 break; 3160 3161 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3162 case ATA_CMD_CFA_WRITE_NE: 3163 case ATA_CMD_CFA_TRANS_SECT: 3164 case ATA_CMD_CFA_WRITE_MULT_NE: 3165 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3166 case ATA_CMD_READ: 3167 case ATA_CMD_READ_EXT: 3168 case ATA_CMD_READ_QUEUED: 3169 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3170 case ATA_CMD_FPDMA_READ: 3171 case ATA_CMD_READ_MULTI: 3172 case ATA_CMD_READ_MULTI_EXT: 3173 case ATA_CMD_PIO_READ: 3174 case ATA_CMD_PIO_READ_EXT: 3175 case ATA_CMD_READ_STREAM_DMA_EXT: 3176 case ATA_CMD_READ_STREAM_EXT: 3177 case ATA_CMD_VERIFY: 3178 case ATA_CMD_VERIFY_EXT: 3179 case ATA_CMD_WRITE: 3180 case ATA_CMD_WRITE_EXT: 3181 case ATA_CMD_WRITE_FUA_EXT: 3182 case ATA_CMD_WRITE_QUEUED: 3183 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3184 case ATA_CMD_FPDMA_WRITE: 3185 case ATA_CMD_WRITE_MULTI: 3186 case ATA_CMD_WRITE_MULTI_EXT: 3187 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3188 case ATA_CMD_PIO_WRITE: 3189 case ATA_CMD_PIO_WRITE_EXT: 3190 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3191 case ATA_CMD_WRITE_STREAM_EXT: 3192 qc->sect_size = scmd->device->sector_size; 3193 break; 3194 3195 /* Everything else uses 512 byte "sectors" */ 3196 default: 3197 qc->sect_size = ATA_SECT_SIZE; 3198 } 3199 3200 /* 3201 * Set flags so that all registers will be written, pass on 3202 * write indication (used for PIO/DMA setup), result TF is 3203 * copied back and we don't whine too much about its failure. 3204 */ 3205 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3206 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3207 tf->flags |= ATA_TFLAG_WRITE; 3208 3209 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3210 3211 /* 3212 * Set transfer length. 3213 * 3214 * TODO: find out if we need to do more here to 3215 * cover scatter/gather case. 3216 */ 3217 ata_qc_set_pc_nbytes(qc); 3218 3219 /* We may not issue DMA commands if no DMA mode is set */ 3220 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3221 fp = 1; 3222 goto invalid_fld; 3223 } 3224 3225 /* We may not issue NCQ commands to devices not supporting NCQ */ 3226 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3227 fp = 1; 3228 goto invalid_fld; 3229 } 3230 3231 /* sanity check for pio multi commands */ 3232 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3233 fp = 1; 3234 goto invalid_fld; 3235 } 3236 3237 if (is_multi_taskfile(tf)) { 3238 unsigned int multi_count = 1 << (cdb[1] >> 5); 3239 3240 /* compare the passed through multi_count 3241 * with the cached multi_count of libata 3242 */ 3243 if (multi_count != dev->multi_count) 3244 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3245 multi_count); 3246 } 3247 3248 /* 3249 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3250 * SET_FEATURES - XFER MODE must be preceded/succeeded 3251 * by an update to hardware-specific registers for each 3252 * controller (i.e. the reason for ->set_piomode(), 3253 * ->set_dmamode(), and ->post_set_mode() hooks). 3254 */ 3255 if (tf->command == ATA_CMD_SET_FEATURES && 3256 tf->feature == SETFEATURES_XFER) { 3257 fp = (cdb[0] == ATA_16) ? 4 : 3; 3258 goto invalid_fld; 3259 } 3260 3261 /* 3262 * Filter TPM commands by default. These provide an 3263 * essentially uncontrolled encrypted "back door" between 3264 * applications and the disk. Set libata.allow_tpm=1 if you 3265 * have a real reason for wanting to use them. This ensures 3266 * that installed software cannot easily mess stuff up without 3267 * user intent. DVR type users will probably ship with this enabled 3268 * for movie content management. 3269 * 3270 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3271 * for this and should do in future but that it is not sufficient as 3272 * DCS is an optional feature set. Thus we also do the software filter 3273 * so that we comply with the TC consortium stated goal that the user 3274 * can turn off TC features of their system. 3275 */ 3276 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3277 fp = (cdb[0] == ATA_16) ? 14 : 9; 3278 goto invalid_fld; 3279 } 3280 3281 return 0; 3282 3283 invalid_fld: 3284 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3285 return 1; 3286 } 3287 3288 /** 3289 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3290 * @cmd: SCSI command being translated 3291 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3292 * @sector: Starting sector 3293 * @count: Total Range of request in logical sectors 3294 * 3295 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3296 * descriptor. 3297 * 3298 * Upto 64 entries of the format: 3299 * 63:48 Range Length 3300 * 47:0 LBA 3301 * 3302 * Range Length of 0 is ignored. 3303 * LBA's should be sorted order and not overlap. 3304 * 3305 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3306 * 3307 * Return: Number of bytes copied into sglist. 3308 */ 3309 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3310 u64 sector, u32 count) 3311 { 3312 struct scsi_device *sdp = cmd->device; 3313 size_t len = sdp->sector_size; 3314 size_t r; 3315 __le64 *buf; 3316 u32 i = 0; 3317 unsigned long flags; 3318 3319 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3320 3321 if (len > ATA_SCSI_RBUF_SIZE) 3322 len = ATA_SCSI_RBUF_SIZE; 3323 3324 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3325 buf = ((void *)ata_scsi_rbuf); 3326 memset(buf, 0, len); 3327 while (i < trmax) { 3328 u64 entry = sector | 3329 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3330 buf[i++] = __cpu_to_le64(entry); 3331 if (count <= 0xffff) 3332 break; 3333 count -= 0xffff; 3334 sector += 0xffff; 3335 } 3336 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3337 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3338 3339 return r; 3340 } 3341 3342 /** 3343 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3344 * @qc: Command to be translated 3345 * 3346 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3347 * an SCT Write Same command. 3348 * Based on WRITE SAME has the UNMAP flag: 3349 * 3350 * - When set translate to DSM TRIM 3351 * - When clear translate to SCT Write Same 3352 */ 3353 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3354 { 3355 struct ata_taskfile *tf = &qc->tf; 3356 struct scsi_cmnd *scmd = qc->scsicmd; 3357 struct scsi_device *sdp = scmd->device; 3358 size_t len = sdp->sector_size; 3359 struct ata_device *dev = qc->dev; 3360 const u8 *cdb = scmd->cmnd; 3361 u64 block; 3362 u32 n_block; 3363 const u32 trmax = len >> 3; 3364 u32 size; 3365 u16 fp; 3366 u8 bp = 0xff; 3367 u8 unmap = cdb[1] & 0x8; 3368 3369 /* we may not issue DMA commands if no DMA mode is set */ 3370 if (unlikely(!ata_dma_enabled(dev))) 3371 goto invalid_opcode; 3372 3373 /* 3374 * We only allow sending this command through the block layer, 3375 * as it modifies the DATA OUT buffer, which would corrupt user 3376 * memory for SG_IO commands. 3377 */ 3378 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3379 goto invalid_opcode; 3380 3381 if (unlikely(scmd->cmd_len < 16)) { 3382 fp = 15; 3383 goto invalid_fld; 3384 } 3385 scsi_16_lba_len(cdb, &block, &n_block); 3386 3387 if (!unmap || (dev->quirks & ATA_QUIRK_NOTRIM) || 3388 !ata_id_has_trim(dev->id)) { 3389 fp = 1; 3390 bp = 3; 3391 goto invalid_fld; 3392 } 3393 /* If the request is too large the cmd is invalid */ 3394 if (n_block > 0xffff * trmax) { 3395 fp = 2; 3396 goto invalid_fld; 3397 } 3398 3399 /* 3400 * WRITE SAME always has a sector sized buffer as payload, this 3401 * should never be a multiple entry S/G list. 3402 */ 3403 if (!scsi_sg_count(scmd)) 3404 goto invalid_param_len; 3405 3406 /* 3407 * size must match sector size in bytes 3408 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3409 * is defined as number of 512 byte blocks to be transferred. 3410 */ 3411 3412 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3413 if (size != len) 3414 goto invalid_param_len; 3415 3416 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3417 /* Newer devices support queued TRIM commands */ 3418 tf->protocol = ATA_PROT_NCQ; 3419 tf->command = ATA_CMD_FPDMA_SEND; 3420 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3421 tf->nsect = qc->hw_tag << 3; 3422 tf->hob_feature = (size / 512) >> 8; 3423 tf->feature = size / 512; 3424 3425 tf->auxiliary = 1; 3426 } else { 3427 tf->protocol = ATA_PROT_DMA; 3428 tf->hob_feature = 0; 3429 tf->feature = ATA_DSM_TRIM; 3430 tf->hob_nsect = (size / 512) >> 8; 3431 tf->nsect = size / 512; 3432 tf->command = ATA_CMD_DSM; 3433 } 3434 3435 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3436 ATA_TFLAG_WRITE; 3437 3438 ata_qc_set_pc_nbytes(qc); 3439 3440 return 0; 3441 3442 invalid_fld: 3443 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3444 return 1; 3445 invalid_param_len: 3446 /* "Parameter list length error" */ 3447 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3448 return 1; 3449 invalid_opcode: 3450 /* "Invalid command operation code" */ 3451 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3452 return 1; 3453 } 3454 3455 /** 3456 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3457 * @dev: Target device. 3458 * @cmd: SCSI command of interest. 3459 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3460 * 3461 * Yields a subset to satisfy scsi_report_opcode() 3462 * 3463 * LOCKING: 3464 * spin_lock_irqsave(host lock) 3465 */ 3466 static unsigned int ata_scsiop_maint_in(struct ata_device *dev, 3467 struct scsi_cmnd *cmd, u8 *rbuf) 3468 { 3469 u8 *cdb = cmd->cmnd; 3470 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3471 3472 if ((cdb[1] & 0x1f) != MI_REPORT_SUPPORTED_OPERATION_CODES) { 3473 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 3474 return 0; 3475 } 3476 3477 if (cdb[2] != 1 && cdb[2] != 3) { 3478 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3479 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 3480 return 0; 3481 } 3482 3483 switch (cdb[3]) { 3484 case INQUIRY: 3485 case MODE_SENSE: 3486 case MODE_SENSE_10: 3487 case READ_CAPACITY: 3488 case SERVICE_ACTION_IN_16: 3489 case REPORT_LUNS: 3490 case REQUEST_SENSE: 3491 case SYNCHRONIZE_CACHE: 3492 case SYNCHRONIZE_CACHE_16: 3493 case REZERO_UNIT: 3494 case SEEK_6: 3495 case SEEK_10: 3496 case TEST_UNIT_READY: 3497 case SEND_DIAGNOSTIC: 3498 case MAINTENANCE_IN: 3499 case READ_6: 3500 case READ_10: 3501 case WRITE_6: 3502 case WRITE_10: 3503 case ATA_12: 3504 case ATA_16: 3505 case VERIFY: 3506 case VERIFY_16: 3507 case MODE_SELECT: 3508 case MODE_SELECT_10: 3509 case START_STOP: 3510 supported = 3; 3511 break; 3512 case READ_16: 3513 supported = 3; 3514 if (dev->flags & ATA_DFLAG_CDL) { 3515 /* 3516 * CDL read descriptors map to the T2A page, that is, 3517 * rwcdlp = 0x01 and cdlp = 0x01 3518 */ 3519 rwcdlp = 0x01; 3520 cdlp = 0x01 << 3; 3521 } 3522 break; 3523 case WRITE_16: 3524 supported = 3; 3525 if (dev->flags & ATA_DFLAG_CDL) { 3526 /* 3527 * CDL write descriptors map to the T2B page, that is, 3528 * rwcdlp = 0x01 and cdlp = 0x02 3529 */ 3530 rwcdlp = 0x01; 3531 cdlp = 0x02 << 3; 3532 } 3533 break; 3534 case ZBC_IN: 3535 case ZBC_OUT: 3536 if (ata_id_zoned_cap(dev->id) || 3537 dev->class == ATA_DEV_ZAC) 3538 supported = 3; 3539 break; 3540 case SECURITY_PROTOCOL_IN: 3541 case SECURITY_PROTOCOL_OUT: 3542 if (dev->flags & ATA_DFLAG_TRUSTED) 3543 supported = 3; 3544 break; 3545 default: 3546 break; 3547 } 3548 3549 /* One command format */ 3550 rbuf[0] = rwcdlp; 3551 rbuf[1] = cdlp | supported; 3552 3553 return 4; 3554 } 3555 3556 /** 3557 * ata_scsi_report_zones_complete - convert ATA output 3558 * @qc: command structure returning the data 3559 * 3560 * Convert T-13 little-endian field representation into 3561 * T-10 big-endian field representation. 3562 * What a mess. 3563 */ 3564 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3565 { 3566 struct scsi_cmnd *scmd = qc->scsicmd; 3567 struct sg_mapping_iter miter; 3568 unsigned long flags; 3569 unsigned int bytes = 0; 3570 3571 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3572 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3573 3574 local_irq_save(flags); 3575 while (sg_miter_next(&miter)) { 3576 unsigned int offset = 0; 3577 3578 if (bytes == 0) { 3579 char *hdr; 3580 u32 list_length; 3581 u64 max_lba, opt_lba; 3582 u16 same; 3583 3584 /* Swizzle header */ 3585 hdr = miter.addr; 3586 list_length = get_unaligned_le32(&hdr[0]); 3587 same = get_unaligned_le16(&hdr[4]); 3588 max_lba = get_unaligned_le64(&hdr[8]); 3589 opt_lba = get_unaligned_le64(&hdr[16]); 3590 put_unaligned_be32(list_length, &hdr[0]); 3591 hdr[4] = same & 0xf; 3592 put_unaligned_be64(max_lba, &hdr[8]); 3593 put_unaligned_be64(opt_lba, &hdr[16]); 3594 offset += 64; 3595 bytes += 64; 3596 } 3597 while (offset < miter.length) { 3598 char *rec; 3599 u8 cond, type, non_seq, reset; 3600 u64 size, start, wp; 3601 3602 /* Swizzle zone descriptor */ 3603 rec = miter.addr + offset; 3604 type = rec[0] & 0xf; 3605 cond = (rec[1] >> 4) & 0xf; 3606 non_seq = (rec[1] & 2); 3607 reset = (rec[1] & 1); 3608 size = get_unaligned_le64(&rec[8]); 3609 start = get_unaligned_le64(&rec[16]); 3610 wp = get_unaligned_le64(&rec[24]); 3611 rec[0] = type; 3612 rec[1] = (cond << 4) | non_seq | reset; 3613 put_unaligned_be64(size, &rec[8]); 3614 put_unaligned_be64(start, &rec[16]); 3615 put_unaligned_be64(wp, &rec[24]); 3616 WARN_ON(offset + 64 > miter.length); 3617 offset += 64; 3618 bytes += 64; 3619 } 3620 } 3621 sg_miter_stop(&miter); 3622 local_irq_restore(flags); 3623 3624 ata_scsi_qc_complete(qc); 3625 } 3626 3627 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3628 { 3629 struct ata_taskfile *tf = &qc->tf; 3630 struct scsi_cmnd *scmd = qc->scsicmd; 3631 const u8 *cdb = scmd->cmnd; 3632 u16 sect, fp = (u16)-1; 3633 u8 sa, options, bp = 0xff; 3634 u64 block; 3635 u32 n_block; 3636 3637 if (unlikely(scmd->cmd_len < 16)) { 3638 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3639 scmd->cmd_len); 3640 fp = 15; 3641 goto invalid_fld; 3642 } 3643 scsi_16_lba_len(cdb, &block, &n_block); 3644 if (n_block != scsi_bufflen(scmd)) { 3645 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3646 n_block, scsi_bufflen(scmd)); 3647 goto invalid_param_len; 3648 } 3649 sa = cdb[1] & 0x1f; 3650 if (sa != ZI_REPORT_ZONES) { 3651 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3652 fp = 1; 3653 goto invalid_fld; 3654 } 3655 /* 3656 * ZAC allows only for transfers in 512 byte blocks, 3657 * and uses a 16 bit value for the transfer count. 3658 */ 3659 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3660 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3661 goto invalid_param_len; 3662 } 3663 sect = n_block / 512; 3664 options = cdb[14] & 0xbf; 3665 3666 if (ata_ncq_enabled(qc->dev) && 3667 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3668 tf->protocol = ATA_PROT_NCQ; 3669 tf->command = ATA_CMD_FPDMA_RECV; 3670 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3671 tf->nsect = qc->hw_tag << 3; 3672 tf->feature = sect & 0xff; 3673 tf->hob_feature = (sect >> 8) & 0xff; 3674 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3675 } else { 3676 tf->command = ATA_CMD_ZAC_MGMT_IN; 3677 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3678 tf->protocol = ATA_PROT_DMA; 3679 tf->hob_feature = options; 3680 tf->hob_nsect = (sect >> 8) & 0xff; 3681 tf->nsect = sect & 0xff; 3682 } 3683 tf->device = ATA_LBA; 3684 tf->lbah = (block >> 16) & 0xff; 3685 tf->lbam = (block >> 8) & 0xff; 3686 tf->lbal = block & 0xff; 3687 tf->hob_lbah = (block >> 40) & 0xff; 3688 tf->hob_lbam = (block >> 32) & 0xff; 3689 tf->hob_lbal = (block >> 24) & 0xff; 3690 3691 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3692 qc->flags |= ATA_QCFLAG_RESULT_TF; 3693 3694 ata_qc_set_pc_nbytes(qc); 3695 3696 qc->complete_fn = ata_scsi_report_zones_complete; 3697 3698 return 0; 3699 3700 invalid_fld: 3701 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3702 return 1; 3703 3704 invalid_param_len: 3705 /* "Parameter list length error" */ 3706 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3707 return 1; 3708 } 3709 3710 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3711 { 3712 struct ata_taskfile *tf = &qc->tf; 3713 struct scsi_cmnd *scmd = qc->scsicmd; 3714 struct ata_device *dev = qc->dev; 3715 const u8 *cdb = scmd->cmnd; 3716 u8 all, sa; 3717 u64 block; 3718 u32 n_block; 3719 u16 fp = (u16)-1; 3720 3721 if (unlikely(scmd->cmd_len < 16)) { 3722 fp = 15; 3723 goto invalid_fld; 3724 } 3725 3726 sa = cdb[1] & 0x1f; 3727 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3728 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3729 fp = 1; 3730 goto invalid_fld; 3731 } 3732 3733 scsi_16_lba_len(cdb, &block, &n_block); 3734 if (n_block) { 3735 /* 3736 * ZAC MANAGEMENT OUT doesn't define any length 3737 */ 3738 goto invalid_param_len; 3739 } 3740 3741 all = cdb[14] & 0x1; 3742 if (all) { 3743 /* 3744 * Ignore the block address (zone ID) as defined by ZBC. 3745 */ 3746 block = 0; 3747 } else if (block >= dev->n_sectors) { 3748 /* 3749 * Block must be a valid zone ID (a zone start LBA). 3750 */ 3751 fp = 2; 3752 goto invalid_fld; 3753 } 3754 3755 if (ata_ncq_enabled(qc->dev) && 3756 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3757 tf->protocol = ATA_PROT_NCQ_NODATA; 3758 tf->command = ATA_CMD_NCQ_NON_DATA; 3759 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3760 tf->nsect = qc->hw_tag << 3; 3761 tf->auxiliary = sa | ((u16)all << 8); 3762 } else { 3763 tf->protocol = ATA_PROT_NODATA; 3764 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3765 tf->feature = sa; 3766 tf->hob_feature = all; 3767 } 3768 tf->lbah = (block >> 16) & 0xff; 3769 tf->lbam = (block >> 8) & 0xff; 3770 tf->lbal = block & 0xff; 3771 tf->hob_lbah = (block >> 40) & 0xff; 3772 tf->hob_lbam = (block >> 32) & 0xff; 3773 tf->hob_lbal = (block >> 24) & 0xff; 3774 tf->device = ATA_LBA; 3775 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3776 3777 return 0; 3778 3779 invalid_fld: 3780 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3781 return 1; 3782 invalid_param_len: 3783 /* "Parameter list length error" */ 3784 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3785 return 1; 3786 } 3787 3788 /** 3789 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3790 * @qc: Storage for translated ATA taskfile 3791 * @buf: input buffer 3792 * @len: number of valid bytes in the input buffer 3793 * @fp: out parameter for the failed field on error 3794 * 3795 * Prepare a taskfile to modify caching information for the device. 3796 * 3797 * LOCKING: 3798 * None. 3799 */ 3800 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3801 const u8 *buf, int len, u16 *fp) 3802 { 3803 struct ata_taskfile *tf = &qc->tf; 3804 struct ata_device *dev = qc->dev; 3805 u8 mpage[CACHE_MPAGE_LEN]; 3806 u8 wce; 3807 int i; 3808 3809 /* 3810 * The first two bytes of def_cache_mpage are a header, so offsets 3811 * in mpage are off by 2 compared to buf. Same for len. 3812 */ 3813 3814 if (len != CACHE_MPAGE_LEN - 2) { 3815 *fp = min(len, CACHE_MPAGE_LEN - 2); 3816 return -EINVAL; 3817 } 3818 3819 wce = buf[0] & (1 << 2); 3820 3821 /* 3822 * Check that read-only bits are not modified. 3823 */ 3824 ata_msense_caching(dev->id, mpage, false); 3825 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3826 if (i == 0) 3827 continue; 3828 if (mpage[i + 2] != buf[i]) { 3829 *fp = i; 3830 return -EINVAL; 3831 } 3832 } 3833 3834 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3835 tf->protocol = ATA_PROT_NODATA; 3836 tf->nsect = 0; 3837 tf->command = ATA_CMD_SET_FEATURES; 3838 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3839 return 0; 3840 } 3841 3842 /* 3843 * Simulate MODE SELECT control mode page, sub-page 0. 3844 */ 3845 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3846 const u8 *buf, int len, u16 *fp) 3847 { 3848 struct ata_device *dev = qc->dev; 3849 u8 mpage[CONTROL_MPAGE_LEN]; 3850 u8 d_sense; 3851 int i; 3852 3853 /* 3854 * The first two bytes of def_control_mpage are a header, so offsets 3855 * in mpage are off by 2 compared to buf. Same for len. 3856 */ 3857 3858 if (len != CONTROL_MPAGE_LEN - 2) { 3859 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3860 return -EINVAL; 3861 } 3862 3863 d_sense = buf[0] & (1 << 2); 3864 3865 /* 3866 * Check that read-only bits are not modified. 3867 */ 3868 ata_msense_control_spg0(dev, mpage, false); 3869 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3870 if (i == 0) 3871 continue; 3872 if (mpage[2 + i] != buf[i]) { 3873 *fp = i; 3874 return -EINVAL; 3875 } 3876 } 3877 if (d_sense & (1 << 2)) 3878 dev->flags |= ATA_DFLAG_D_SENSE; 3879 else 3880 dev->flags &= ~ATA_DFLAG_D_SENSE; 3881 return 0; 3882 } 3883 3884 /* 3885 * Translate MODE SELECT control mode page, sub-page f2h (ATA feature mode 3886 * page) into a SET FEATURES command. 3887 */ 3888 static int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 3889 const u8 *buf, int len, u16 *fp) 3890 { 3891 struct ata_device *dev = qc->dev; 3892 struct ata_taskfile *tf = &qc->tf; 3893 u8 cdl_action; 3894 3895 /* 3896 * The first four bytes of ATA Feature Control mode page are a header, 3897 * so offsets in mpage are off by 4 compared to buf. Same for len. 3898 */ 3899 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 3900 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 3901 return -EINVAL; 3902 } 3903 3904 /* Check cdl_ctrl */ 3905 switch (buf[0] & 0x03) { 3906 case 0: 3907 /* Disable CDL if it is enabled */ 3908 if (!(dev->flags & ATA_DFLAG_CDL_ENABLED)) 3909 return 0; 3910 ata_dev_dbg(dev, "Disabling CDL\n"); 3911 cdl_action = 0; 3912 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 3913 break; 3914 case 0x02: 3915 /* 3916 * Enable CDL if not already enabled. Since this is mutually 3917 * exclusive with NCQ priority, allow this only if NCQ priority 3918 * is disabled. 3919 */ 3920 if (dev->flags & ATA_DFLAG_CDL_ENABLED) 3921 return 0; 3922 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 3923 ata_dev_err(dev, 3924 "NCQ priority must be disabled to enable CDL\n"); 3925 return -EINVAL; 3926 } 3927 ata_dev_dbg(dev, "Enabling CDL\n"); 3928 cdl_action = 1; 3929 dev->flags |= ATA_DFLAG_CDL_ENABLED; 3930 break; 3931 default: 3932 *fp = 0; 3933 return -EINVAL; 3934 } 3935 3936 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3937 tf->protocol = ATA_PROT_NODATA; 3938 tf->command = ATA_CMD_SET_FEATURES; 3939 tf->feature = SETFEATURES_CDL; 3940 tf->nsect = cdl_action; 3941 3942 return 1; 3943 } 3944 3945 /** 3946 * ata_mselect_control - Simulate MODE SELECT for control page 3947 * @qc: Storage for translated ATA taskfile 3948 * @spg: target sub-page of the control page 3949 * @buf: input buffer 3950 * @len: number of valid bytes in the input buffer 3951 * @fp: out parameter for the failed field on error 3952 * 3953 * Prepare a taskfile to modify caching information for the device. 3954 * 3955 * LOCKING: 3956 * None. 3957 */ 3958 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 3959 const u8 *buf, int len, u16 *fp) 3960 { 3961 switch (spg) { 3962 case 0: 3963 return ata_mselect_control_spg0(qc, buf, len, fp); 3964 case ATA_FEATURE_SUB_MPAGE: 3965 return ata_mselect_control_ata_feature(qc, buf, len, fp); 3966 default: 3967 return -EINVAL; 3968 } 3969 } 3970 3971 /** 3972 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3973 * @qc: Storage for translated ATA taskfile 3974 * 3975 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3976 * Assume this is invoked for direct access devices (e.g. disks) only. 3977 * There should be no block descriptor for other device types. 3978 * 3979 * LOCKING: 3980 * spin_lock_irqsave(host lock) 3981 */ 3982 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3983 { 3984 struct scsi_cmnd *scmd = qc->scsicmd; 3985 const u8 *cdb = scmd->cmnd; 3986 u8 pg, spg; 3987 unsigned six_byte, pg_len, hdr_len, bd_len; 3988 int len, ret; 3989 u16 fp = (u16)-1; 3990 u8 bp = 0xff; 3991 u8 buffer[64]; 3992 const u8 *p = buffer; 3993 3994 six_byte = (cdb[0] == MODE_SELECT); 3995 if (six_byte) { 3996 if (scmd->cmd_len < 5) { 3997 fp = 4; 3998 goto invalid_fld; 3999 } 4000 4001 len = cdb[4]; 4002 hdr_len = 4; 4003 } else { 4004 if (scmd->cmd_len < 9) { 4005 fp = 8; 4006 goto invalid_fld; 4007 } 4008 4009 len = get_unaligned_be16(&cdb[7]); 4010 hdr_len = 8; 4011 } 4012 4013 /* We only support PF=1, SP=0. */ 4014 if ((cdb[1] & 0x11) != 0x10) { 4015 fp = 1; 4016 bp = (cdb[1] & 0x01) ? 1 : 5; 4017 goto invalid_fld; 4018 } 4019 4020 /* Test early for possible overrun. */ 4021 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 4022 goto invalid_param_len; 4023 4024 /* Move past header and block descriptors. */ 4025 if (len < hdr_len) 4026 goto invalid_param_len; 4027 4028 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 4029 buffer, sizeof(buffer))) 4030 goto invalid_param_len; 4031 4032 if (six_byte) 4033 bd_len = p[3]; 4034 else 4035 bd_len = get_unaligned_be16(&p[6]); 4036 4037 len -= hdr_len; 4038 p += hdr_len; 4039 if (len < bd_len) 4040 goto invalid_param_len; 4041 if (bd_len != 0 && bd_len != 8) { 4042 fp = (six_byte) ? 3 : 6; 4043 fp += bd_len + hdr_len; 4044 goto invalid_param; 4045 } 4046 4047 len -= bd_len; 4048 p += bd_len; 4049 if (len == 0) 4050 goto skip; 4051 4052 /* Parse both possible formats for the mode page headers. */ 4053 pg = p[0] & 0x3f; 4054 if (p[0] & 0x40) { 4055 if (len < 4) 4056 goto invalid_param_len; 4057 4058 spg = p[1]; 4059 pg_len = get_unaligned_be16(&p[2]); 4060 p += 4; 4061 len -= 4; 4062 } else { 4063 if (len < 2) 4064 goto invalid_param_len; 4065 4066 spg = 0; 4067 pg_len = p[1]; 4068 p += 2; 4069 len -= 2; 4070 } 4071 4072 /* 4073 * Supported subpages: all subpages and ATA feature sub-page f2h of 4074 * the control page. 4075 */ 4076 if (spg) { 4077 switch (spg) { 4078 case ALL_SUB_MPAGES: 4079 /* All subpages is not supported for the control page */ 4080 if (pg == CONTROL_MPAGE) { 4081 fp = (p[0] & 0x40) ? 1 : 0; 4082 fp += hdr_len + bd_len; 4083 goto invalid_param; 4084 } 4085 break; 4086 case ATA_FEATURE_SUB_MPAGE: 4087 if (qc->dev->flags & ATA_DFLAG_CDL && 4088 pg == CONTROL_MPAGE) 4089 break; 4090 fallthrough; 4091 default: 4092 fp = (p[0] & 0x40) ? 1 : 0; 4093 fp += hdr_len + bd_len; 4094 goto invalid_param; 4095 } 4096 } 4097 if (pg_len > len) 4098 goto invalid_param_len; 4099 4100 switch (pg) { 4101 case CACHE_MPAGE: 4102 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4103 fp += hdr_len + bd_len; 4104 goto invalid_param; 4105 } 4106 break; 4107 case CONTROL_MPAGE: 4108 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 4109 if (ret < 0) { 4110 fp += hdr_len + bd_len; 4111 goto invalid_param; 4112 } 4113 if (!ret) 4114 goto skip; /* No ATA command to send */ 4115 break; 4116 default: 4117 /* Invalid page code */ 4118 fp = bd_len + hdr_len; 4119 goto invalid_param; 4120 } 4121 4122 /* 4123 * Only one page has changeable data, so we only support setting one 4124 * page at a time. 4125 */ 4126 if (len > pg_len) 4127 goto invalid_param; 4128 4129 return 0; 4130 4131 invalid_fld: 4132 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4133 return 1; 4134 4135 invalid_param: 4136 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4137 return 1; 4138 4139 invalid_param_len: 4140 /* "Parameter list length error" */ 4141 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4142 return 1; 4143 4144 skip: 4145 scmd->result = SAM_STAT_GOOD; 4146 return 1; 4147 } 4148 4149 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4150 { 4151 if (len == 0) 4152 return ATA_CMD_TRUSTED_NONDATA; 4153 else if (send) 4154 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4155 else 4156 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4157 } 4158 4159 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4160 { 4161 struct scsi_cmnd *scmd = qc->scsicmd; 4162 const u8 *cdb = scmd->cmnd; 4163 struct ata_taskfile *tf = &qc->tf; 4164 u8 secp = cdb[1]; 4165 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4166 u16 spsp = get_unaligned_be16(&cdb[2]); 4167 u32 len = get_unaligned_be32(&cdb[6]); 4168 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4169 4170 /* 4171 * We don't support the ATA "security" protocol. 4172 */ 4173 if (secp == 0xef) { 4174 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4175 return 1; 4176 } 4177 4178 if (cdb[4] & 7) { /* INC_512 */ 4179 if (len > 0xffff) { 4180 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4181 return 1; 4182 } 4183 } else { 4184 if (len > 0x01fffe00) { 4185 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4186 return 1; 4187 } 4188 4189 /* convert to the sector-based ATA addressing */ 4190 len = (len + 511) / 512; 4191 } 4192 4193 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4194 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4195 if (send) 4196 tf->flags |= ATA_TFLAG_WRITE; 4197 tf->command = ata_scsi_trusted_op(len, send, dma); 4198 tf->feature = secp; 4199 tf->lbam = spsp & 0xff; 4200 tf->lbah = spsp >> 8; 4201 4202 if (len) { 4203 tf->nsect = len & 0xff; 4204 tf->lbal = len >> 8; 4205 } else { 4206 if (!send) 4207 tf->lbah = (1 << 7); 4208 } 4209 4210 ata_qc_set_pc_nbytes(qc); 4211 return 0; 4212 } 4213 4214 /** 4215 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4216 * @qc: Command to be translated 4217 * 4218 * Translate a SCSI variable length CDB to specified commands. 4219 * It checks a service action value in CDB to call corresponding handler. 4220 * 4221 * RETURNS: 4222 * Zero on success, non-zero on failure 4223 * 4224 */ 4225 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4226 { 4227 struct scsi_cmnd *scmd = qc->scsicmd; 4228 const u8 *cdb = scmd->cmnd; 4229 const u16 sa = get_unaligned_be16(&cdb[8]); 4230 4231 /* 4232 * if service action represents a ata pass-thru(32) command, 4233 * then pass it to ata_scsi_pass_thru handler. 4234 */ 4235 if (sa == ATA_32) 4236 return ata_scsi_pass_thru(qc); 4237 4238 /* unsupported service action */ 4239 return 1; 4240 } 4241 4242 /** 4243 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4244 * @dev: ATA device 4245 * @cmd: SCSI command opcode to consider 4246 * 4247 * Look up the SCSI command given, and determine whether the 4248 * SCSI command is to be translated or simulated. 4249 * 4250 * RETURNS: 4251 * Pointer to translation function if possible, %NULL if not. 4252 */ 4253 4254 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4255 { 4256 switch (cmd) { 4257 case READ_6: 4258 case READ_10: 4259 case READ_16: 4260 4261 case WRITE_6: 4262 case WRITE_10: 4263 case WRITE_16: 4264 return ata_scsi_rw_xlat; 4265 4266 case WRITE_SAME_16: 4267 return ata_scsi_write_same_xlat; 4268 4269 case SYNCHRONIZE_CACHE: 4270 case SYNCHRONIZE_CACHE_16: 4271 if (ata_try_flush_cache(dev)) 4272 return ata_scsi_flush_xlat; 4273 break; 4274 4275 case VERIFY: 4276 case VERIFY_16: 4277 return ata_scsi_verify_xlat; 4278 4279 case ATA_12: 4280 case ATA_16: 4281 return ata_scsi_pass_thru; 4282 4283 case VARIABLE_LENGTH_CMD: 4284 return ata_scsi_var_len_cdb_xlat; 4285 4286 case MODE_SELECT: 4287 case MODE_SELECT_10: 4288 return ata_scsi_mode_select_xlat; 4289 4290 case ZBC_IN: 4291 return ata_scsi_zbc_in_xlat; 4292 4293 case ZBC_OUT: 4294 return ata_scsi_zbc_out_xlat; 4295 4296 case SECURITY_PROTOCOL_IN: 4297 case SECURITY_PROTOCOL_OUT: 4298 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4299 break; 4300 return ata_scsi_security_inout_xlat; 4301 4302 case START_STOP: 4303 return ata_scsi_start_stop_xlat; 4304 } 4305 4306 return NULL; 4307 } 4308 4309 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4310 { 4311 struct ata_port *ap = dev->link->ap; 4312 u8 scsi_op = scmd->cmnd[0]; 4313 ata_xlat_func_t xlat_func; 4314 4315 /* 4316 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4317 * However, this check is done without holding the ap->lock (a libata 4318 * specific lock), so we can have received an error irq since then, 4319 * therefore we must check if EH is pending or running, while holding 4320 * ap->lock. 4321 */ 4322 if (ata_port_eh_scheduled(ap)) 4323 return SCSI_MLQUEUE_DEVICE_BUSY; 4324 4325 if (unlikely(!scmd->cmd_len)) 4326 goto bad_cdb_len; 4327 4328 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4329 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4330 goto bad_cdb_len; 4331 4332 xlat_func = ata_get_xlat_func(dev, scsi_op); 4333 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4334 /* relay SCSI command to ATAPI device */ 4335 int len = COMMAND_SIZE(scsi_op); 4336 4337 if (unlikely(len > scmd->cmd_len || 4338 len > dev->cdb_len || 4339 scmd->cmd_len > ATAPI_CDB_LEN)) 4340 goto bad_cdb_len; 4341 4342 xlat_func = atapi_xlat; 4343 } else { 4344 /* ATA_16 passthru, treat as an ATA command */ 4345 if (unlikely(scmd->cmd_len > 16)) 4346 goto bad_cdb_len; 4347 4348 xlat_func = ata_get_xlat_func(dev, scsi_op); 4349 } 4350 4351 if (xlat_func) 4352 return ata_scsi_translate(dev, scmd, xlat_func); 4353 4354 ata_scsi_simulate(dev, scmd); 4355 4356 return 0; 4357 4358 bad_cdb_len: 4359 scmd->result = DID_ERROR << 16; 4360 scsi_done(scmd); 4361 return 0; 4362 } 4363 4364 /** 4365 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4366 * @shost: SCSI host of command to be sent 4367 * @cmd: SCSI command to be sent 4368 * 4369 * In some cases, this function translates SCSI commands into 4370 * ATA taskfiles, and queues the taskfiles to be sent to 4371 * hardware. In other cases, this function simulates a 4372 * SCSI device by evaluating and responding to certain 4373 * SCSI commands. This creates the overall effect of 4374 * ATA and ATAPI devices appearing as SCSI devices. 4375 * 4376 * LOCKING: 4377 * ATA host lock 4378 * 4379 * RETURNS: 4380 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4381 * 0 otherwise. 4382 */ 4383 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4384 { 4385 struct ata_port *ap; 4386 struct ata_device *dev; 4387 struct scsi_device *scsidev = cmd->device; 4388 int rc = 0; 4389 unsigned long irq_flags; 4390 4391 ap = ata_shost_to_port(shost); 4392 4393 spin_lock_irqsave(ap->lock, irq_flags); 4394 4395 dev = ata_scsi_find_dev(ap, scsidev); 4396 if (likely(dev)) 4397 rc = __ata_scsi_queuecmd(cmd, dev); 4398 else { 4399 cmd->result = (DID_BAD_TARGET << 16); 4400 scsi_done(cmd); 4401 } 4402 4403 spin_unlock_irqrestore(ap->lock, irq_flags); 4404 4405 return rc; 4406 } 4407 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4408 4409 /** 4410 * ata_scsi_simulate - simulate SCSI command on ATA device 4411 * @dev: the target device 4412 * @cmd: SCSI command being sent to device. 4413 * 4414 * Interprets and directly executes a select list of SCSI commands 4415 * that can be handled internally. 4416 * 4417 * LOCKING: 4418 * spin_lock_irqsave(host lock) 4419 */ 4420 4421 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4422 { 4423 const u8 *scsicmd = cmd->cmnd; 4424 u8 tmp8; 4425 4426 switch(scsicmd[0]) { 4427 case INQUIRY: 4428 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_inquiry); 4429 break; 4430 4431 case MODE_SENSE: 4432 case MODE_SENSE_10: 4433 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_mode_sense); 4434 break; 4435 4436 case READ_CAPACITY: 4437 case SERVICE_ACTION_IN_16: 4438 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_read_cap); 4439 break; 4440 4441 case REPORT_LUNS: 4442 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_report_luns); 4443 break; 4444 4445 case REQUEST_SENSE: 4446 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4447 break; 4448 4449 /* if we reach this, then writeback caching is disabled, 4450 * turning this into a no-op. 4451 */ 4452 case SYNCHRONIZE_CACHE: 4453 case SYNCHRONIZE_CACHE_16: 4454 fallthrough; 4455 4456 /* no-op's, complete with success */ 4457 case REZERO_UNIT: 4458 case SEEK_6: 4459 case SEEK_10: 4460 case TEST_UNIT_READY: 4461 break; 4462 4463 case SEND_DIAGNOSTIC: 4464 tmp8 = scsicmd[1] & ~(1 << 3); 4465 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4466 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4467 break; 4468 4469 case MAINTENANCE_IN: 4470 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_maint_in); 4471 break; 4472 4473 /* all other commands */ 4474 default: 4475 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4476 /* "Invalid command operation code" */ 4477 break; 4478 } 4479 4480 scsi_done(cmd); 4481 } 4482 4483 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4484 { 4485 int i, rc; 4486 4487 for (i = 0; i < host->n_ports; i++) { 4488 struct ata_port *ap = host->ports[i]; 4489 struct Scsi_Host *shost; 4490 4491 rc = -ENOMEM; 4492 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4493 if (!shost) 4494 goto err_alloc; 4495 4496 shost->eh_noresume = 1; 4497 *(struct ata_port **)&shost->hostdata[0] = ap; 4498 ap->scsi_host = shost; 4499 4500 shost->transportt = ata_scsi_transport_template; 4501 shost->unique_id = ap->print_id; 4502 shost->max_id = 16; 4503 shost->max_lun = 1; 4504 shost->max_channel = 1; 4505 shost->max_cmd_len = 32; 4506 4507 /* Schedule policy is determined by ->qc_defer() 4508 * callback and it needs to see every deferred qc. 4509 * Set host_blocked to 1 to prevent SCSI midlayer from 4510 * automatically deferring requests. 4511 */ 4512 shost->max_host_blocked = 1; 4513 4514 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4515 if (rc) 4516 goto err_alloc; 4517 } 4518 4519 return 0; 4520 4521 err_alloc: 4522 while (--i >= 0) { 4523 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4524 4525 /* scsi_host_put() is in ata_devres_release() */ 4526 scsi_remove_host(shost); 4527 } 4528 return rc; 4529 } 4530 4531 #ifdef CONFIG_OF 4532 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4533 { 4534 struct scsi_device *sdev = dev->sdev; 4535 struct device *d = ap->host->dev; 4536 struct device_node *np = d->of_node; 4537 struct device_node *child; 4538 4539 for_each_available_child_of_node(np, child) { 4540 int ret; 4541 u32 val; 4542 4543 ret = of_property_read_u32(child, "reg", &val); 4544 if (ret) 4545 continue; 4546 if (val == dev->devno) { 4547 dev_dbg(d, "found matching device node\n"); 4548 sdev->sdev_gendev.of_node = child; 4549 return; 4550 } 4551 } 4552 } 4553 #else 4554 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4555 { 4556 } 4557 #endif 4558 4559 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4560 { 4561 int tries = 5; 4562 struct ata_device *last_failed_dev = NULL; 4563 struct ata_link *link; 4564 struct ata_device *dev; 4565 4566 repeat: 4567 ata_for_each_link(link, ap, EDGE) { 4568 ata_for_each_dev(dev, link, ENABLED) { 4569 struct scsi_device *sdev; 4570 int channel = 0, id = 0; 4571 4572 if (dev->sdev) 4573 continue; 4574 4575 if (ata_is_host_link(link)) 4576 id = dev->devno; 4577 else 4578 channel = link->pmp; 4579 4580 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4581 NULL); 4582 if (!IS_ERR(sdev)) { 4583 dev->sdev = sdev; 4584 ata_scsi_assign_ofnode(dev, ap); 4585 scsi_device_put(sdev); 4586 } else { 4587 dev->sdev = NULL; 4588 } 4589 } 4590 } 4591 4592 /* If we scanned while EH was in progress or allocation 4593 * failure occurred, scan would have failed silently. Check 4594 * whether all devices are attached. 4595 */ 4596 ata_for_each_link(link, ap, EDGE) { 4597 ata_for_each_dev(dev, link, ENABLED) { 4598 if (!dev->sdev) 4599 goto exit_loop; 4600 } 4601 } 4602 exit_loop: 4603 if (!link) 4604 return; 4605 4606 /* we're missing some SCSI devices */ 4607 if (sync) { 4608 /* If caller requested synchrnous scan && we've made 4609 * any progress, sleep briefly and repeat. 4610 */ 4611 if (dev != last_failed_dev) { 4612 msleep(100); 4613 last_failed_dev = dev; 4614 goto repeat; 4615 } 4616 4617 /* We might be failing to detect boot device, give it 4618 * a few more chances. 4619 */ 4620 if (--tries) { 4621 msleep(100); 4622 goto repeat; 4623 } 4624 4625 ata_port_err(ap, 4626 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4627 } 4628 4629 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4630 round_jiffies_relative(HZ)); 4631 } 4632 4633 /** 4634 * ata_scsi_offline_dev - offline attached SCSI device 4635 * @dev: ATA device to offline attached SCSI device for 4636 * 4637 * This function is called from ata_eh_detach_dev() and is responsible for 4638 * taking the SCSI device attached to @dev offline. This function is 4639 * called with host lock which protects dev->sdev against clearing. 4640 * 4641 * LOCKING: 4642 * spin_lock_irqsave(host lock) 4643 * 4644 * RETURNS: 4645 * true if attached SCSI device exists, false otherwise. 4646 */ 4647 bool ata_scsi_offline_dev(struct ata_device *dev) 4648 { 4649 if (dev->sdev) { 4650 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4651 return true; 4652 } 4653 return false; 4654 } 4655 4656 /** 4657 * ata_scsi_remove_dev - remove attached SCSI device 4658 * @dev: ATA device to remove attached SCSI device for 4659 * 4660 * This function is called from ata_eh_scsi_hotplug() and 4661 * responsible for removing the SCSI device attached to @dev. 4662 * 4663 * LOCKING: 4664 * Kernel thread context (may sleep). 4665 */ 4666 static void ata_scsi_remove_dev(struct ata_device *dev) 4667 { 4668 struct ata_port *ap = dev->link->ap; 4669 struct scsi_device *sdev; 4670 unsigned long flags; 4671 4672 /* Alas, we need to grab scan_mutex to ensure SCSI device 4673 * state doesn't change underneath us and thus 4674 * scsi_device_get() always succeeds. The mutex locking can 4675 * be removed if there is __scsi_device_get() interface which 4676 * increments reference counts regardless of device state. 4677 */ 4678 mutex_lock(&ap->scsi_host->scan_mutex); 4679 spin_lock_irqsave(ap->lock, flags); 4680 4681 /* clearing dev->sdev is protected by host lock */ 4682 sdev = dev->sdev; 4683 dev->sdev = NULL; 4684 4685 if (sdev) { 4686 /* If user initiated unplug races with us, sdev can go 4687 * away underneath us after the host lock and 4688 * scan_mutex are released. Hold onto it. 4689 */ 4690 if (scsi_device_get(sdev) == 0) { 4691 /* The following ensures the attached sdev is 4692 * offline on return from ata_scsi_offline_dev() 4693 * regardless it wins or loses the race 4694 * against this function. 4695 */ 4696 scsi_device_set_state(sdev, SDEV_OFFLINE); 4697 } else { 4698 WARN_ON(1); 4699 sdev = NULL; 4700 } 4701 } 4702 4703 spin_unlock_irqrestore(ap->lock, flags); 4704 mutex_unlock(&ap->scsi_host->scan_mutex); 4705 4706 if (sdev) { 4707 ata_dev_info(dev, "detaching (SCSI %s)\n", 4708 dev_name(&sdev->sdev_gendev)); 4709 4710 scsi_remove_device(sdev); 4711 scsi_device_put(sdev); 4712 } 4713 } 4714 4715 static void ata_scsi_handle_link_detach(struct ata_link *link) 4716 { 4717 struct ata_port *ap = link->ap; 4718 struct ata_device *dev; 4719 4720 ata_for_each_dev(dev, link, ALL) { 4721 unsigned long flags; 4722 4723 spin_lock_irqsave(ap->lock, flags); 4724 if (!(dev->flags & ATA_DFLAG_DETACHED)) { 4725 spin_unlock_irqrestore(ap->lock, flags); 4726 continue; 4727 } 4728 4729 dev->flags &= ~ATA_DFLAG_DETACHED; 4730 spin_unlock_irqrestore(ap->lock, flags); 4731 4732 ata_scsi_remove_dev(dev); 4733 } 4734 } 4735 4736 /** 4737 * ata_scsi_media_change_notify - send media change event 4738 * @dev: Pointer to the disk device with media change event 4739 * 4740 * Tell the block layer to send a media change notification 4741 * event. 4742 * 4743 * LOCKING: 4744 * spin_lock_irqsave(host lock) 4745 */ 4746 void ata_scsi_media_change_notify(struct ata_device *dev) 4747 { 4748 if (dev->sdev) 4749 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4750 GFP_ATOMIC); 4751 } 4752 4753 /** 4754 * ata_scsi_hotplug - SCSI part of hotplug 4755 * @work: Pointer to ATA port to perform SCSI hotplug on 4756 * 4757 * Perform SCSI part of hotplug. It's executed from a separate 4758 * workqueue after EH completes. This is necessary because SCSI 4759 * hot plugging requires working EH and hot unplugging is 4760 * synchronized with hot plugging with a mutex. 4761 * 4762 * LOCKING: 4763 * Kernel thread context (may sleep). 4764 */ 4765 void ata_scsi_hotplug(struct work_struct *work) 4766 { 4767 struct ata_port *ap = 4768 container_of(work, struct ata_port, hotplug_task.work); 4769 int i; 4770 4771 if (ap->pflags & ATA_PFLAG_UNLOADING) 4772 return; 4773 4774 mutex_lock(&ap->scsi_scan_mutex); 4775 4776 /* Unplug detached devices. We cannot use link iterator here 4777 * because PMP links have to be scanned even if PMP is 4778 * currently not attached. Iterate manually. 4779 */ 4780 ata_scsi_handle_link_detach(&ap->link); 4781 if (ap->pmp_link) 4782 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4783 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4784 4785 /* scan for new ones */ 4786 ata_scsi_scan_host(ap, 0); 4787 4788 mutex_unlock(&ap->scsi_scan_mutex); 4789 } 4790 4791 /** 4792 * ata_scsi_user_scan - indication for user-initiated bus scan 4793 * @shost: SCSI host to scan 4794 * @channel: Channel to scan 4795 * @id: ID to scan 4796 * @lun: LUN to scan 4797 * 4798 * This function is called when user explicitly requests bus 4799 * scan. Set probe pending flag and invoke EH. 4800 * 4801 * LOCKING: 4802 * SCSI layer (we don't care) 4803 * 4804 * RETURNS: 4805 * Zero. 4806 */ 4807 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4808 unsigned int id, u64 lun) 4809 { 4810 struct ata_port *ap = ata_shost_to_port(shost); 4811 unsigned long flags; 4812 int devno, rc = 0; 4813 4814 if (lun != SCAN_WILD_CARD && lun) 4815 return -EINVAL; 4816 4817 if (!sata_pmp_attached(ap)) { 4818 if (channel != SCAN_WILD_CARD && channel) 4819 return -EINVAL; 4820 devno = id; 4821 } else { 4822 if (id != SCAN_WILD_CARD && id) 4823 return -EINVAL; 4824 devno = channel; 4825 } 4826 4827 spin_lock_irqsave(ap->lock, flags); 4828 4829 if (devno == SCAN_WILD_CARD) { 4830 struct ata_link *link; 4831 4832 ata_for_each_link(link, ap, EDGE) { 4833 struct ata_eh_info *ehi = &link->eh_info; 4834 ehi->probe_mask |= ATA_ALL_DEVICES; 4835 ehi->action |= ATA_EH_RESET; 4836 } 4837 } else { 4838 struct ata_device *dev = ata_find_dev(ap, devno); 4839 4840 if (dev) { 4841 struct ata_eh_info *ehi = &dev->link->eh_info; 4842 ehi->probe_mask |= 1 << dev->devno; 4843 ehi->action |= ATA_EH_RESET; 4844 } else 4845 rc = -EINVAL; 4846 } 4847 4848 if (rc == 0) { 4849 ata_port_schedule_eh(ap); 4850 spin_unlock_irqrestore(ap->lock, flags); 4851 ata_port_wait_eh(ap); 4852 } else 4853 spin_unlock_irqrestore(ap->lock, flags); 4854 4855 return rc; 4856 } 4857 4858 /** 4859 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4860 * @work: Pointer to ATA port to perform scsi_rescan_device() 4861 * 4862 * After ATA pass thru (SAT) commands are executed successfully, 4863 * libata need to propagate the changes to SCSI layer. 4864 * 4865 * LOCKING: 4866 * Kernel thread context (may sleep). 4867 */ 4868 void ata_scsi_dev_rescan(struct work_struct *work) 4869 { 4870 struct ata_port *ap = 4871 container_of(work, struct ata_port, scsi_rescan_task.work); 4872 struct ata_link *link; 4873 struct ata_device *dev; 4874 unsigned long flags; 4875 bool do_resume; 4876 int ret = 0; 4877 4878 mutex_lock(&ap->scsi_scan_mutex); 4879 spin_lock_irqsave(ap->lock, flags); 4880 4881 ata_for_each_link(link, ap, EDGE) { 4882 ata_for_each_dev(dev, link, ENABLED) { 4883 struct scsi_device *sdev = dev->sdev; 4884 4885 /* 4886 * If the port was suspended before this was scheduled, 4887 * bail out. 4888 */ 4889 if (ap->pflags & ATA_PFLAG_SUSPENDED) 4890 goto unlock_ap; 4891 4892 if (!sdev) 4893 continue; 4894 if (scsi_device_get(sdev)) 4895 continue; 4896 4897 do_resume = dev->flags & ATA_DFLAG_RESUMING; 4898 4899 spin_unlock_irqrestore(ap->lock, flags); 4900 if (do_resume) { 4901 ret = scsi_resume_device(sdev); 4902 if (ret == -EWOULDBLOCK) 4903 goto unlock_scan; 4904 dev->flags &= ~ATA_DFLAG_RESUMING; 4905 } 4906 ret = scsi_rescan_device(sdev); 4907 scsi_device_put(sdev); 4908 spin_lock_irqsave(ap->lock, flags); 4909 4910 if (ret) 4911 goto unlock_ap; 4912 } 4913 } 4914 4915 unlock_ap: 4916 spin_unlock_irqrestore(ap->lock, flags); 4917 unlock_scan: 4918 mutex_unlock(&ap->scsi_scan_mutex); 4919 4920 /* Reschedule with a delay if scsi_rescan_device() returned an error */ 4921 if (ret) 4922 schedule_delayed_work(&ap->scsi_rescan_task, 4923 msecs_to_jiffies(5)); 4924 } 4925