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 * @unused: gendisk 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 gendisk *unused, 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 /* Busy: must be first because BUSY means no other bits valid */ 863 { ATA_BUSY, ABORTED_COMMAND, 0x00, 0x00 }, 864 /* Device fault: INTERNAL TARGET FAILURE */ 865 { ATA_DF, HARDWARE_ERROR, 0x44, 0x00 }, 866 /* Corrected data error */ 867 { ATA_CORR, RECOVERED_ERROR, 0x00, 0x00 }, 868 869 { 0xFF, 0xFF, 0xFF, 0xFF }, /* END mark */ 870 }; 871 872 /* 873 * Is this an error we can process/parse 874 */ 875 if (drv_stat & ATA_BUSY) { 876 drv_err = 0; /* Ignore the err bits, they're invalid */ 877 } 878 879 if (drv_err) { 880 /* Look for drv_err */ 881 for (i = 0; sense_table[i][0] != 0xFF; i++) { 882 /* Look for best matches first */ 883 if ((sense_table[i][0] & drv_err) == 884 sense_table[i][0]) { 885 *sk = sense_table[i][1]; 886 *asc = sense_table[i][2]; 887 *ascq = sense_table[i][3]; 888 return; 889 } 890 } 891 } 892 893 /* 894 * Fall back to interpreting status bits. Note that if the drv_err 895 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 896 * is not descriptive enough. 897 */ 898 for (i = 0; stat_table[i][0] != 0xFF; i++) { 899 if (stat_table[i][0] & drv_stat) { 900 *sk = stat_table[i][1]; 901 *asc = stat_table[i][2]; 902 *ascq = stat_table[i][3]; 903 return; 904 } 905 } 906 907 /* 908 * We need a sensible error return here, which is tricky, and one 909 * that won't cause people to do things like return a disk wrongly. 910 */ 911 *sk = ABORTED_COMMAND; 912 *asc = 0x00; 913 *ascq = 0x00; 914 } 915 916 /* 917 * ata_gen_passthru_sense - Generate check condition sense block. 918 * @qc: Command that completed. 919 * 920 * This function is specific to the ATA pass through commands. 921 * Regardless of whether the command errored or not, return a sense 922 * block. If there was no error, we get the request from an ATA 923 * passthrough command, so we use the following sense data: 924 * sk = RECOVERED ERROR 925 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 926 * 927 * 928 * LOCKING: 929 * None. 930 */ 931 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 932 { 933 struct ata_device *dev = qc->dev; 934 struct scsi_cmnd *cmd = qc->scsicmd; 935 struct ata_taskfile *tf = &qc->result_tf; 936 u8 sense_key, asc, ascq; 937 938 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 939 ata_dev_dbg(dev, 940 "missing result TF: can't generate ATA PT sense data\n"); 941 if (qc->err_mask) 942 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 943 return; 944 } 945 946 /* 947 * Use ata_to_sense_error() to map status register bits 948 * onto sense key, asc & ascq. 949 */ 950 if (qc->err_mask || 951 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 952 ata_to_sense_error(tf->status, tf->error, 953 &sense_key, &asc, &ascq); 954 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 955 } else { 956 /* 957 * ATA PASS-THROUGH INFORMATION AVAILABLE 958 * 959 * Note: we are supposed to call ata_scsi_set_sense(), which 960 * respects the D_SENSE bit, instead of unconditionally 961 * generating the sense data in descriptor format. However, 962 * because hdparm, hddtemp, and udisks incorrectly assume sense 963 * data in descriptor format, without even looking at the 964 * RESPONSE CODE field in the returned sense data (to see which 965 * format the returned sense data is in), we are stuck with 966 * being bug compatible with older kernels. 967 */ 968 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 969 } 970 } 971 972 /** 973 * ata_gen_ata_sense - generate a SCSI fixed sense block 974 * @qc: Command that we are erroring out 975 * 976 * Generate sense block for a failed ATA command @qc. 977 * 978 * LOCKING: 979 * None. 980 */ 981 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 982 { 983 struct ata_device *dev = qc->dev; 984 struct scsi_cmnd *cmd = qc->scsicmd; 985 struct ata_taskfile *tf = &qc->result_tf; 986 u8 sense_key, asc, ascq; 987 988 if (ata_dev_disabled(dev)) { 989 /* Device disabled after error recovery */ 990 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 991 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 992 return; 993 } 994 995 if (ata_id_is_locked(dev->id)) { 996 /* Security locked */ 997 /* LOGICAL UNIT ACCESS NOT AUTHORIZED */ 998 ata_scsi_set_sense(dev, cmd, DATA_PROTECT, 0x74, 0x71); 999 return; 1000 } 1001 1002 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 1003 ata_dev_dbg(dev, 1004 "Missing result TF: reporting aborted command\n"); 1005 goto aborted; 1006 } 1007 1008 /* Use ata_to_sense_error() to map status register bits 1009 * onto sense key, asc & ascq. 1010 */ 1011 if (qc->err_mask || 1012 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1013 ata_to_sense_error(tf->status, tf->error, 1014 &sense_key, &asc, &ascq); 1015 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1016 return; 1017 } 1018 1019 /* Could not decode error */ 1020 ata_dev_warn(dev, 1021 "Could not decode error 0x%x, status 0x%x (err_mask=0x%x)\n", 1022 tf->error, tf->status, qc->err_mask); 1023 aborted: 1024 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1025 } 1026 1027 void ata_scsi_sdev_config(struct scsi_device *sdev) 1028 { 1029 sdev->use_10_for_rw = 1; 1030 sdev->use_10_for_ms = 1; 1031 sdev->no_write_same = 1; 1032 1033 /* Schedule policy is determined by ->qc_defer() callback and 1034 * it needs to see every deferred qc. Set dev_blocked to 1 to 1035 * prevent SCSI midlayer from automatically deferring 1036 * requests. 1037 */ 1038 sdev->max_device_blocked = 1; 1039 } 1040 1041 /** 1042 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1043 * @rq: request to be checked 1044 * 1045 * ATAPI commands which transfer variable length data to host 1046 * might overflow due to application error or hardware bug. This 1047 * function checks whether overflow should be drained and ignored 1048 * for @request. 1049 * 1050 * LOCKING: 1051 * None. 1052 * 1053 * RETURNS: 1054 * 1 if ; otherwise, 0. 1055 */ 1056 bool ata_scsi_dma_need_drain(struct request *rq) 1057 { 1058 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1059 1060 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1061 } 1062 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1063 1064 int ata_scsi_dev_config(struct scsi_device *sdev, struct queue_limits *lim, 1065 struct ata_device *dev) 1066 { 1067 int depth = 1; 1068 1069 if (!ata_id_has_unload(dev->id)) 1070 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1071 1072 /* configure max sectors */ 1073 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1074 lim->max_hw_sectors = dev->max_sectors; 1075 1076 if (dev->class == ATA_DEV_ATAPI) { 1077 sdev->sector_size = ATA_SECT_SIZE; 1078 1079 /* set DMA padding */ 1080 lim->dma_pad_mask = ATA_DMA_PAD_SZ - 1; 1081 1082 /* make room for appending the drain */ 1083 lim->max_segments--; 1084 1085 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1086 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1087 if (!sdev->dma_drain_buf) { 1088 ata_dev_err(dev, "drain buffer allocation failed\n"); 1089 return -ENOMEM; 1090 } 1091 } else { 1092 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1093 1094 /* 1095 * Ask the sd driver to issue START STOP UNIT on runtime suspend 1096 * and resume and shutdown only. For system level suspend/resume, 1097 * devices power state is handled directly by libata EH. 1098 * Given that disks are always spun up on system resume, also 1099 * make sure that the sd driver forces runtime suspended disks 1100 * to be resumed to correctly reflect the power state of the 1101 * device. 1102 */ 1103 sdev->manage_runtime_start_stop = 1; 1104 sdev->manage_shutdown = 1; 1105 sdev->force_runtime_start_on_system_start = 1; 1106 } 1107 1108 /* 1109 * ata_pio_sectors() expects buffer for each sector to not cross 1110 * page boundary. Enforce it by requiring buffers to be sector 1111 * aligned, which works iff sector_size is not larger than 1112 * PAGE_SIZE. ATAPI devices also need the alignment as 1113 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1114 */ 1115 if (sdev->sector_size > PAGE_SIZE) 1116 ata_dev_warn(dev, 1117 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1118 sdev->sector_size); 1119 1120 lim->dma_alignment = sdev->sector_size - 1; 1121 1122 if (dev->flags & ATA_DFLAG_AN) 1123 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1124 1125 if (ata_ncq_supported(dev)) 1126 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1127 depth = min(ATA_MAX_QUEUE, depth); 1128 scsi_change_queue_depth(sdev, depth); 1129 1130 if (dev->flags & ATA_DFLAG_TRUSTED) 1131 sdev->security_supported = 1; 1132 1133 dev->sdev = sdev; 1134 return 0; 1135 } 1136 1137 /** 1138 * ata_scsi_sdev_init - Early setup of SCSI device 1139 * @sdev: SCSI device to examine 1140 * 1141 * This is called from scsi_alloc_sdev() when the scsi device 1142 * associated with an ATA device is scanned on a port. 1143 * 1144 * LOCKING: 1145 * Defined by SCSI layer. We don't really care. 1146 */ 1147 1148 int ata_scsi_sdev_init(struct scsi_device *sdev) 1149 { 1150 struct ata_port *ap = ata_shost_to_port(sdev->host); 1151 struct device_link *link; 1152 1153 ata_scsi_sdev_config(sdev); 1154 1155 /* 1156 * Create a link from the ata_port device to the scsi device to ensure 1157 * that PM does suspend/resume in the correct order: the scsi device is 1158 * consumer (child) and the ata port the supplier (parent). 1159 */ 1160 link = device_link_add(&sdev->sdev_gendev, &ap->tdev, 1161 DL_FLAG_STATELESS | 1162 DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); 1163 if (!link) { 1164 ata_port_err(ap, "Failed to create link to scsi device %s\n", 1165 dev_name(&sdev->sdev_gendev)); 1166 return -ENODEV; 1167 } 1168 1169 return 0; 1170 } 1171 EXPORT_SYMBOL_GPL(ata_scsi_sdev_init); 1172 1173 /** 1174 * ata_scsi_sdev_configure - Set SCSI device attributes 1175 * @sdev: SCSI device to examine 1176 * @lim: queue limits 1177 * 1178 * This is called before we actually start reading 1179 * and writing to the device, to configure certain 1180 * SCSI mid-layer behaviors. 1181 * 1182 * LOCKING: 1183 * Defined by SCSI layer. We don't really care. 1184 */ 1185 1186 int ata_scsi_sdev_configure(struct scsi_device *sdev, struct queue_limits *lim) 1187 { 1188 struct ata_port *ap = ata_shost_to_port(sdev->host); 1189 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1190 1191 if (dev) 1192 return ata_scsi_dev_config(sdev, lim, dev); 1193 1194 return 0; 1195 } 1196 EXPORT_SYMBOL_GPL(ata_scsi_sdev_configure); 1197 1198 /** 1199 * ata_scsi_sdev_destroy - SCSI device is about to be destroyed 1200 * @sdev: SCSI device to be destroyed 1201 * 1202 * @sdev is about to be destroyed for hot/warm unplugging. If 1203 * this unplugging was initiated by libata as indicated by NULL 1204 * dev->sdev, this function doesn't have to do anything. 1205 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1206 * Clear dev->sdev, schedule the device for ATA detach and invoke 1207 * EH. 1208 * 1209 * LOCKING: 1210 * Defined by SCSI layer. We don't really care. 1211 */ 1212 void ata_scsi_sdev_destroy(struct scsi_device *sdev) 1213 { 1214 struct ata_port *ap = ata_shost_to_port(sdev->host); 1215 unsigned long flags; 1216 struct ata_device *dev; 1217 1218 device_link_remove(&sdev->sdev_gendev, &ap->tdev); 1219 1220 spin_lock_irqsave(ap->lock, flags); 1221 dev = __ata_scsi_find_dev(ap, sdev); 1222 if (dev && dev->sdev) { 1223 /* SCSI device already in CANCEL state, no need to offline it */ 1224 dev->sdev = NULL; 1225 dev->flags |= ATA_DFLAG_DETACH; 1226 ata_port_schedule_eh(ap); 1227 } 1228 spin_unlock_irqrestore(ap->lock, flags); 1229 1230 kfree(sdev->dma_drain_buf); 1231 } 1232 EXPORT_SYMBOL_GPL(ata_scsi_sdev_destroy); 1233 1234 /** 1235 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1236 * @qc: Storage for translated ATA taskfile 1237 * 1238 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1239 * (to start). Perhaps these commands should be preceded by 1240 * CHECK POWER MODE to see what power mode the device is already in. 1241 * [See SAT revision 5 at www.t10.org] 1242 * 1243 * LOCKING: 1244 * spin_lock_irqsave(host lock) 1245 * 1246 * RETURNS: 1247 * Zero on success, non-zero on error. 1248 */ 1249 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1250 { 1251 struct scsi_cmnd *scmd = qc->scsicmd; 1252 const u8 *cdb = scmd->cmnd; 1253 u16 fp; 1254 u8 bp = 0xff; 1255 1256 if (scmd->cmd_len < 5) { 1257 fp = 4; 1258 goto invalid_fld; 1259 } 1260 1261 /* LOEJ bit set not supported */ 1262 if (cdb[4] & 0x2) { 1263 fp = 4; 1264 bp = 1; 1265 goto invalid_fld; 1266 } 1267 1268 /* Power conditions not supported */ 1269 if (((cdb[4] >> 4) & 0xf) != 0) { 1270 fp = 4; 1271 bp = 3; 1272 goto invalid_fld; 1273 } 1274 1275 /* Ignore IMMED bit (cdb[1] & 0x1), violates sat-r05 */ 1276 if (!ata_dev_power_init_tf(qc->dev, &qc->tf, cdb[4] & 0x1)) { 1277 ata_scsi_set_sense(qc->dev, scmd, ABORTED_COMMAND, 0, 0); 1278 return 1; 1279 } 1280 1281 /* 1282 * Standby and Idle condition timers could be implemented but that 1283 * would require libata to implement the Power condition mode page 1284 * and allow the user to change it. Changing mode pages requires 1285 * MODE SELECT to be implemented. 1286 */ 1287 1288 return 0; 1289 1290 invalid_fld: 1291 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1292 return 1; 1293 } 1294 1295 /** 1296 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1297 * @qc: Storage for translated ATA taskfile 1298 * 1299 * Sets up an ATA taskfile to issue FLUSH CACHE or 1300 * FLUSH CACHE EXT. 1301 * 1302 * LOCKING: 1303 * spin_lock_irqsave(host lock) 1304 * 1305 * RETURNS: 1306 * Zero on success, non-zero on error. 1307 */ 1308 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1309 { 1310 struct ata_taskfile *tf = &qc->tf; 1311 1312 tf->flags |= ATA_TFLAG_DEVICE; 1313 tf->protocol = ATA_PROT_NODATA; 1314 1315 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1316 tf->command = ATA_CMD_FLUSH_EXT; 1317 else 1318 tf->command = ATA_CMD_FLUSH; 1319 1320 /* flush is critical for IO integrity, consider it an IO command */ 1321 qc->flags |= ATA_QCFLAG_IO; 1322 1323 return 0; 1324 } 1325 1326 /** 1327 * scsi_6_lba_len - Get LBA and transfer length 1328 * @cdb: SCSI command to translate 1329 * 1330 * Calculate LBA and transfer length for 6-byte commands. 1331 * 1332 * RETURNS: 1333 * @plba: the LBA 1334 * @plen: the transfer length 1335 */ 1336 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1337 { 1338 *plba = get_unaligned_be24(&cdb[1]) & 0x1fffff; 1339 *plen = cdb[4]; 1340 } 1341 1342 /** 1343 * scsi_10_lba_len - Get LBA and transfer length 1344 * @cdb: SCSI command to translate 1345 * 1346 * Calculate LBA and transfer length for 10-byte commands. 1347 * 1348 * RETURNS: 1349 * @plba: the LBA 1350 * @plen: the transfer length 1351 */ 1352 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1353 { 1354 *plba = get_unaligned_be32(&cdb[2]); 1355 *plen = get_unaligned_be16(&cdb[7]); 1356 } 1357 1358 /** 1359 * scsi_16_lba_len - Get LBA and transfer length 1360 * @cdb: SCSI command to translate 1361 * 1362 * Calculate LBA and transfer length for 16-byte commands. 1363 * 1364 * RETURNS: 1365 * @plba: the LBA 1366 * @plen: the transfer length 1367 */ 1368 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1369 { 1370 *plba = get_unaligned_be64(&cdb[2]); 1371 *plen = get_unaligned_be32(&cdb[10]); 1372 } 1373 1374 /** 1375 * scsi_dld - Get duration limit descriptor index 1376 * @cdb: SCSI command to translate 1377 * 1378 * Returns the dld bits indicating the index of a command duration limit 1379 * descriptor. 1380 */ 1381 static inline int scsi_dld(const u8 *cdb) 1382 { 1383 return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03); 1384 } 1385 1386 /** 1387 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1388 * @qc: Storage for translated ATA taskfile 1389 * 1390 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1391 * 1392 * LOCKING: 1393 * spin_lock_irqsave(host lock) 1394 * 1395 * RETURNS: 1396 * Zero on success, non-zero on error. 1397 */ 1398 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1399 { 1400 struct scsi_cmnd *scmd = qc->scsicmd; 1401 struct ata_taskfile *tf = &qc->tf; 1402 struct ata_device *dev = qc->dev; 1403 u64 dev_sectors = qc->dev->n_sectors; 1404 const u8 *cdb = scmd->cmnd; 1405 u64 block; 1406 u32 n_block; 1407 u16 fp; 1408 1409 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1410 tf->protocol = ATA_PROT_NODATA; 1411 1412 switch (cdb[0]) { 1413 case VERIFY: 1414 if (scmd->cmd_len < 10) { 1415 fp = 9; 1416 goto invalid_fld; 1417 } 1418 scsi_10_lba_len(cdb, &block, &n_block); 1419 break; 1420 case VERIFY_16: 1421 if (scmd->cmd_len < 16) { 1422 fp = 15; 1423 goto invalid_fld; 1424 } 1425 scsi_16_lba_len(cdb, &block, &n_block); 1426 break; 1427 default: 1428 fp = 0; 1429 goto invalid_fld; 1430 } 1431 1432 if (!n_block) 1433 goto nothing_to_do; 1434 if (block >= dev_sectors) 1435 goto out_of_range; 1436 if ((block + n_block) > dev_sectors) 1437 goto out_of_range; 1438 1439 if (dev->flags & ATA_DFLAG_LBA) { 1440 tf->flags |= ATA_TFLAG_LBA; 1441 1442 if (lba_28_ok(block, n_block)) { 1443 /* use LBA28 */ 1444 tf->command = ATA_CMD_VERIFY; 1445 tf->device |= (block >> 24) & 0xf; 1446 } else if (lba_48_ok(block, n_block)) { 1447 if (!(dev->flags & ATA_DFLAG_LBA48)) 1448 goto out_of_range; 1449 1450 /* use LBA48 */ 1451 tf->flags |= ATA_TFLAG_LBA48; 1452 tf->command = ATA_CMD_VERIFY_EXT; 1453 1454 tf->hob_nsect = (n_block >> 8) & 0xff; 1455 1456 tf->hob_lbah = (block >> 40) & 0xff; 1457 tf->hob_lbam = (block >> 32) & 0xff; 1458 tf->hob_lbal = (block >> 24) & 0xff; 1459 } else 1460 /* request too large even for LBA48 */ 1461 goto out_of_range; 1462 1463 tf->nsect = n_block & 0xff; 1464 1465 tf->lbah = (block >> 16) & 0xff; 1466 tf->lbam = (block >> 8) & 0xff; 1467 tf->lbal = block & 0xff; 1468 1469 tf->device |= ATA_LBA; 1470 } else { 1471 /* CHS */ 1472 u32 sect, head, cyl, track; 1473 1474 if (!lba_28_ok(block, n_block)) 1475 goto out_of_range; 1476 1477 /* Convert LBA to CHS */ 1478 track = (u32)block / dev->sectors; 1479 cyl = track / dev->heads; 1480 head = track % dev->heads; 1481 sect = (u32)block % dev->sectors + 1; 1482 1483 /* Check whether the converted CHS can fit. 1484 Cylinder: 0-65535 1485 Head: 0-15 1486 Sector: 1-255*/ 1487 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1488 goto out_of_range; 1489 1490 tf->command = ATA_CMD_VERIFY; 1491 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1492 tf->lbal = sect; 1493 tf->lbam = cyl; 1494 tf->lbah = cyl >> 8; 1495 tf->device |= head; 1496 } 1497 1498 return 0; 1499 1500 invalid_fld: 1501 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1502 return 1; 1503 1504 out_of_range: 1505 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1506 /* "Logical Block Address out of range" */ 1507 return 1; 1508 1509 nothing_to_do: 1510 scmd->result = SAM_STAT_GOOD; 1511 return 1; 1512 } 1513 1514 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1515 { 1516 struct request *rq = scsi_cmd_to_rq(scmd); 1517 u32 req_blocks; 1518 1519 if (!blk_rq_is_passthrough(rq)) 1520 return true; 1521 1522 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1523 if (n_blocks > req_blocks) 1524 return false; 1525 1526 return true; 1527 } 1528 1529 /** 1530 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1531 * @qc: Storage for translated ATA taskfile 1532 * 1533 * Converts any of six SCSI read/write commands into the 1534 * ATA counterpart, including starting sector (LBA), 1535 * sector count, and taking into account the device's LBA48 1536 * support. 1537 * 1538 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1539 * %WRITE_16 are currently supported. 1540 * 1541 * LOCKING: 1542 * spin_lock_irqsave(host lock) 1543 * 1544 * RETURNS: 1545 * Zero on success, non-zero on error. 1546 */ 1547 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1548 { 1549 struct scsi_cmnd *scmd = qc->scsicmd; 1550 const u8 *cdb = scmd->cmnd; 1551 struct request *rq = scsi_cmd_to_rq(scmd); 1552 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1553 unsigned int tf_flags = 0; 1554 int dld = 0; 1555 u64 block; 1556 u32 n_block; 1557 int rc; 1558 u16 fp = 0; 1559 1560 switch (cdb[0]) { 1561 case WRITE_6: 1562 case WRITE_10: 1563 case WRITE_16: 1564 tf_flags |= ATA_TFLAG_WRITE; 1565 break; 1566 } 1567 1568 /* Calculate the SCSI LBA, transfer length and FUA. */ 1569 switch (cdb[0]) { 1570 case READ_10: 1571 case WRITE_10: 1572 if (unlikely(scmd->cmd_len < 10)) { 1573 fp = 9; 1574 goto invalid_fld; 1575 } 1576 scsi_10_lba_len(cdb, &block, &n_block); 1577 if (cdb[1] & (1 << 3)) 1578 tf_flags |= ATA_TFLAG_FUA; 1579 if (!ata_check_nblocks(scmd, n_block)) 1580 goto invalid_fld; 1581 break; 1582 case READ_6: 1583 case WRITE_6: 1584 if (unlikely(scmd->cmd_len < 6)) { 1585 fp = 5; 1586 goto invalid_fld; 1587 } 1588 scsi_6_lba_len(cdb, &block, &n_block); 1589 1590 /* for 6-byte r/w commands, transfer length 0 1591 * means 256 blocks of data, not 0 block. 1592 */ 1593 if (!n_block) 1594 n_block = 256; 1595 if (!ata_check_nblocks(scmd, n_block)) 1596 goto invalid_fld; 1597 break; 1598 case READ_16: 1599 case WRITE_16: 1600 if (unlikely(scmd->cmd_len < 16)) { 1601 fp = 15; 1602 goto invalid_fld; 1603 } 1604 scsi_16_lba_len(cdb, &block, &n_block); 1605 dld = scsi_dld(cdb); 1606 if (cdb[1] & (1 << 3)) 1607 tf_flags |= ATA_TFLAG_FUA; 1608 if (!ata_check_nblocks(scmd, n_block)) 1609 goto invalid_fld; 1610 break; 1611 default: 1612 fp = 0; 1613 goto invalid_fld; 1614 } 1615 1616 /* Check and compose ATA command */ 1617 if (!n_block) 1618 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1619 * length 0 means transfer 0 block of data. 1620 * However, for ATA R/W commands, sector count 0 means 1621 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1622 * 1623 * WARNING: one or two older ATA drives treat 0 as 0... 1624 */ 1625 goto nothing_to_do; 1626 1627 qc->flags |= ATA_QCFLAG_IO; 1628 qc->nbytes = n_block * scmd->device->sector_size; 1629 1630 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class); 1631 if (likely(rc == 0)) 1632 return 0; 1633 1634 if (rc == -ERANGE) 1635 goto out_of_range; 1636 /* treat all other errors as -EINVAL, fall through */ 1637 invalid_fld: 1638 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1639 return 1; 1640 1641 out_of_range: 1642 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1643 /* "Logical Block Address out of range" */ 1644 return 1; 1645 1646 nothing_to_do: 1647 scmd->result = SAM_STAT_GOOD; 1648 return 1; 1649 } 1650 1651 static void ata_qc_done(struct ata_queued_cmd *qc) 1652 { 1653 struct scsi_cmnd *cmd = qc->scsicmd; 1654 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1655 1656 ata_qc_free(qc); 1657 done(cmd); 1658 } 1659 1660 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1661 { 1662 struct scsi_cmnd *cmd = qc->scsicmd; 1663 u8 *cdb = cmd->cmnd; 1664 bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID; 1665 bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12; 1666 bool is_ck_cond_request = cdb[2] & 0x20; 1667 bool is_error = qc->err_mask != 0; 1668 1669 /* For ATA pass thru (SAT) commands, generate a sense block if 1670 * user mandated it or if there's an error. Note that if we 1671 * generate because the user forced us to [CK_COND=1], a check 1672 * condition is generated and the ATA register values are returned 1673 * whether the command completed successfully or not. If there 1674 * was no error, and CK_COND=1, we use the following sense data: 1675 * sk = RECOVERED ERROR 1676 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1677 */ 1678 if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) { 1679 if (!have_sense) 1680 ata_gen_passthru_sense(qc); 1681 ata_scsi_set_passthru_sense_fields(qc); 1682 if (is_ck_cond_request) 1683 set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); 1684 } else if (is_error) { 1685 if (!have_sense) 1686 ata_gen_ata_sense(qc); 1687 ata_scsi_set_sense_information(qc); 1688 } 1689 1690 ata_qc_done(qc); 1691 } 1692 1693 /** 1694 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1695 * @dev: ATA device to which the command is addressed 1696 * @cmd: SCSI command to execute 1697 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1698 * 1699 * Our ->queuecommand() function has decided that the SCSI 1700 * command issued can be directly translated into an ATA 1701 * command, rather than handled internally. 1702 * 1703 * This function sets up an ata_queued_cmd structure for the 1704 * SCSI command, and sends that ata_queued_cmd to the hardware. 1705 * 1706 * The xlat_func argument (actor) returns 0 if ready to execute 1707 * ATA command, else 1 to finish translation. If 1 is returned 1708 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1709 * to be set reflecting an error condition or clean (early) 1710 * termination. 1711 * 1712 * LOCKING: 1713 * spin_lock_irqsave(host lock) 1714 * 1715 * RETURNS: 1716 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1717 * needs to be deferred. 1718 */ 1719 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1720 ata_xlat_func_t xlat_func) 1721 { 1722 struct ata_port *ap = dev->link->ap; 1723 struct ata_queued_cmd *qc; 1724 int rc; 1725 1726 qc = ata_scsi_qc_new(dev, cmd); 1727 if (!qc) 1728 goto err_mem; 1729 1730 /* data is present; dma-map it */ 1731 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1732 cmd->sc_data_direction == DMA_TO_DEVICE) { 1733 if (unlikely(scsi_bufflen(cmd) < 1)) { 1734 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1735 goto err_did; 1736 } 1737 1738 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1739 1740 qc->dma_dir = cmd->sc_data_direction; 1741 } 1742 1743 qc->complete_fn = ata_scsi_qc_complete; 1744 1745 if (xlat_func(qc)) 1746 goto early_finish; 1747 1748 if (ap->ops->qc_defer) { 1749 if ((rc = ap->ops->qc_defer(qc))) 1750 goto defer; 1751 } 1752 1753 /* select device, send command to hardware */ 1754 ata_qc_issue(qc); 1755 1756 return 0; 1757 1758 early_finish: 1759 ata_qc_free(qc); 1760 scsi_done(cmd); 1761 return 0; 1762 1763 err_did: 1764 ata_qc_free(qc); 1765 cmd->result = (DID_ERROR << 16); 1766 scsi_done(cmd); 1767 err_mem: 1768 return 0; 1769 1770 defer: 1771 ata_qc_free(qc); 1772 if (rc == ATA_DEFER_LINK) 1773 return SCSI_MLQUEUE_DEVICE_BUSY; 1774 else 1775 return SCSI_MLQUEUE_HOST_BUSY; 1776 } 1777 1778 /** 1779 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1780 * @dev: Target device. 1781 * @cmd: SCSI command of interest. 1782 * @actor: Callback hook for desired SCSI command simulator 1783 * 1784 * Takes care of the hard work of simulating a SCSI command... 1785 * Mapping the response buffer, calling the command's handler, 1786 * and handling the handler's return value. This return value 1787 * indicates whether the handler wishes the SCSI command to be 1788 * completed successfully (0), or not (in which case cmd->result 1789 * and sense buffer are assumed to be set). 1790 * 1791 * LOCKING: 1792 * spin_lock_irqsave(host lock) 1793 */ 1794 static void ata_scsi_rbuf_fill(struct ata_device *dev, struct scsi_cmnd *cmd, 1795 unsigned int (*actor)(struct ata_device *dev, 1796 struct scsi_cmnd *cmd, u8 *rbuf)) 1797 { 1798 unsigned long flags; 1799 unsigned int len; 1800 1801 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1802 1803 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1804 len = actor(dev, cmd, ata_scsi_rbuf); 1805 if (len) { 1806 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1807 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1808 cmd->result = SAM_STAT_GOOD; 1809 if (scsi_bufflen(cmd) > len) 1810 scsi_set_resid(cmd, scsi_bufflen(cmd) - len); 1811 } 1812 1813 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1814 } 1815 1816 /** 1817 * ata_scsiop_inq_std - Simulate standard INQUIRY command 1818 * @dev: Target device. 1819 * @cmd: SCSI command of interest. 1820 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1821 * 1822 * Returns standard device identification data associated 1823 * with non-VPD INQUIRY command output. 1824 * 1825 * LOCKING: 1826 * spin_lock_irqsave(host lock) 1827 */ 1828 static unsigned int ata_scsiop_inq_std(struct ata_device *dev, 1829 struct scsi_cmnd *cmd, u8 *rbuf) 1830 { 1831 static const u8 versions[] = { 1832 0x00, 1833 0x60, /* SAM-3 (no version claimed) */ 1834 1835 0x03, 1836 0x20, /* SBC-2 (no version claimed) */ 1837 1838 0x03, 1839 0x00 /* SPC-3 (no version claimed) */ 1840 }; 1841 static const u8 versions_zbc[] = { 1842 0x00, 1843 0xA0, /* SAM-5 (no version claimed) */ 1844 1845 0x06, 1846 0x00, /* SBC-4 (no version claimed) */ 1847 1848 0x05, 1849 0xC0, /* SPC-5 (no version claimed) */ 1850 1851 0x60, 1852 0x24, /* ZBC r05 */ 1853 }; 1854 1855 u8 hdr[] = { 1856 TYPE_DISK, 1857 0, 1858 0x5, /* claim SPC-3 version compatibility */ 1859 2, 1860 95 - 4, 1861 0, 1862 0, 1863 2 1864 }; 1865 1866 /* 1867 * Set the SCSI Removable Media Bit (RMB) if the ATA removable media 1868 * device bit (obsolete since ATA-8 ACS) is set. 1869 */ 1870 if (ata_id_removable(dev->id)) 1871 hdr[1] |= (1 << 7); 1872 1873 if (dev->class == ATA_DEV_ZAC) { 1874 hdr[0] = TYPE_ZBC; 1875 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1876 } 1877 1878 if (dev->flags & ATA_DFLAG_CDL) 1879 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 1880 1881 memcpy(rbuf, hdr, sizeof(hdr)); 1882 memcpy(&rbuf[8], "ATA ", 8); 1883 ata_id_string(dev->id, &rbuf[16], ATA_ID_PROD, 16); 1884 1885 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1886 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1887 if (strncmp(&rbuf[32], " ", 4) == 0) 1888 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV, 4); 1889 1890 if (rbuf[32] == 0 || rbuf[32] == ' ') 1891 memcpy(&rbuf[32], "n/a ", 4); 1892 1893 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 1894 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1895 else 1896 memcpy(rbuf + 58, versions, sizeof(versions)); 1897 1898 /* 1899 * Include all 8 possible version descriptors, even if not all of 1900 * them are popoulated. 1901 */ 1902 return 96; 1903 } 1904 1905 /** 1906 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1907 * @dev: Target device. 1908 * @cmd: SCSI command of interest. 1909 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1910 * 1911 * Returns list of inquiry VPD pages available. 1912 * 1913 * LOCKING: 1914 * spin_lock_irqsave(host lock) 1915 */ 1916 static unsigned int ata_scsiop_inq_00(struct ata_device *dev, 1917 struct scsi_cmnd *cmd, u8 *rbuf) 1918 { 1919 int i, num_pages = 0; 1920 static const u8 pages[] = { 1921 0x00, /* page 0x00, this page */ 1922 0x80, /* page 0x80, unit serial no page */ 1923 0x83, /* page 0x83, device ident page */ 1924 0x89, /* page 0x89, ata info page */ 1925 0xb0, /* page 0xb0, block limits page */ 1926 0xb1, /* page 0xb1, block device characteristics page */ 1927 0xb2, /* page 0xb2, thin provisioning page */ 1928 0xb6, /* page 0xb6, zoned block device characteristics */ 1929 0xb9, /* page 0xb9, concurrent positioning ranges */ 1930 }; 1931 1932 for (i = 0; i < sizeof(pages); i++) { 1933 if (pages[i] == 0xb6 && !ata_dev_is_zac(dev)) 1934 continue; 1935 rbuf[num_pages + 4] = pages[i]; 1936 num_pages++; 1937 } 1938 rbuf[3] = num_pages; /* number of supported VPD pages */ 1939 1940 return get_unaligned_be16(&rbuf[2]) + 4; 1941 } 1942 1943 /** 1944 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1945 * @dev: Target device. 1946 * @cmd: SCSI command of interest. 1947 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1948 * 1949 * Returns ATA device serial number. 1950 * 1951 * LOCKING: 1952 * spin_lock_irqsave(host lock) 1953 */ 1954 static unsigned int ata_scsiop_inq_80(struct ata_device *dev, 1955 struct scsi_cmnd *cmd, u8 *rbuf) 1956 { 1957 static const u8 hdr[] = { 1958 0, 1959 0x80, /* this page code */ 1960 0, 1961 ATA_ID_SERNO_LEN, /* page len */ 1962 }; 1963 1964 memcpy(rbuf, hdr, sizeof(hdr)); 1965 ata_id_string(dev->id, (unsigned char *) &rbuf[4], 1966 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1967 1968 return get_unaligned_be16(&rbuf[2]) + 4; 1969 } 1970 1971 /** 1972 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1973 * @dev: Target device. 1974 * @cmd: SCSI command of interest. 1975 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1976 * 1977 * Yields two logical unit device identification designators: 1978 * - vendor specific ASCII containing the ATA serial number 1979 * - SAT defined "t10 vendor id based" containing ASCII vendor 1980 * name ("ATA "), model and serial numbers. 1981 * 1982 * LOCKING: 1983 * spin_lock_irqsave(host lock) 1984 */ 1985 static unsigned int ata_scsiop_inq_83(struct ata_device *dev, 1986 struct scsi_cmnd *cmd, u8 *rbuf) 1987 { 1988 const int sat_model_serial_desc_len = 68; 1989 int num; 1990 1991 rbuf[1] = 0x83; /* this page code */ 1992 num = 4; 1993 1994 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1995 rbuf[num + 0] = 2; 1996 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1997 num += 4; 1998 ata_id_string(dev->id, (unsigned char *) rbuf + num, 1999 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2000 num += ATA_ID_SERNO_LEN; 2001 2002 /* SAT defined lu model and serial numbers descriptor */ 2003 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2004 rbuf[num + 0] = 2; 2005 rbuf[num + 1] = 1; 2006 rbuf[num + 3] = sat_model_serial_desc_len; 2007 num += 4; 2008 memcpy(rbuf + num, "ATA ", 8); 2009 num += 8; 2010 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2011 ATA_ID_PROD_LEN); 2012 num += ATA_ID_PROD_LEN; 2013 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2014 ATA_ID_SERNO_LEN); 2015 num += ATA_ID_SERNO_LEN; 2016 2017 if (ata_id_has_wwn(dev->id)) { 2018 /* SAT defined lu world wide name */ 2019 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2020 rbuf[num + 0] = 1; 2021 rbuf[num + 1] = 3; 2022 rbuf[num + 3] = ATA_ID_WWN_LEN; 2023 num += 4; 2024 ata_id_string(dev->id, (unsigned char *) rbuf + num, 2025 ATA_ID_WWN, ATA_ID_WWN_LEN); 2026 num += ATA_ID_WWN_LEN; 2027 } 2028 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2029 2030 return get_unaligned_be16(&rbuf[2]) + 4; 2031 } 2032 2033 /** 2034 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2035 * @dev: Target device. 2036 * @cmd: SCSI command of interest. 2037 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2038 * 2039 * Yields SAT-specified ATA VPD page. 2040 * 2041 * LOCKING: 2042 * spin_lock_irqsave(host lock) 2043 */ 2044 static unsigned int ata_scsiop_inq_89(struct ata_device *dev, 2045 struct scsi_cmnd *cmd, u8 *rbuf) 2046 { 2047 rbuf[1] = 0x89; /* our page code */ 2048 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2049 rbuf[3] = (0x238 & 0xff); 2050 2051 memcpy(&rbuf[8], "linux ", 8); 2052 memcpy(&rbuf[16], "libata ", 16); 2053 memcpy(&rbuf[32], DRV_VERSION, 4); 2054 2055 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2056 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2057 /* TODO: PMP? */ 2058 2059 /* we don't store the ATA device signature, so we fake it */ 2060 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2061 rbuf[40] = 0x1; 2062 rbuf[48] = 0x1; 2063 2064 rbuf[56] = ATA_CMD_ID_ATA; 2065 2066 memcpy(&rbuf[60], &dev->id[0], 512); 2067 2068 return get_unaligned_be16(&rbuf[2]) + 4; 2069 } 2070 2071 /** 2072 * ata_scsiop_inq_b0 - Simulate INQUIRY VPD page B0, Block Limits 2073 * @dev: Target device. 2074 * @cmd: SCSI command of interest. 2075 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2076 * 2077 * Return data for the VPD page B0h (Block Limits). 2078 * 2079 * LOCKING: 2080 * spin_lock_irqsave(host lock) 2081 */ 2082 static unsigned int ata_scsiop_inq_b0(struct ata_device *dev, 2083 struct scsi_cmnd *cmd, u8 *rbuf) 2084 { 2085 u16 min_io_sectors; 2086 2087 rbuf[1] = 0xb0; 2088 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2089 2090 /* 2091 * Optimal transfer length granularity. 2092 * 2093 * This is always one physical block, but for disks with a smaller 2094 * logical than physical sector size we need to figure out what the 2095 * latter is. 2096 */ 2097 min_io_sectors = 1 << ata_id_log2_per_physical_sector(dev->id); 2098 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2099 2100 /* 2101 * Optimal unmap granularity. 2102 * 2103 * The ATA spec doesn't even know about a granularity or alignment 2104 * for the TRIM command. We can leave away most of the unmap related 2105 * VPD page entries, but we have specifify a granularity to signal 2106 * that we support some form of unmap - in thise case via WRITE SAME 2107 * with the unmap bit set. 2108 */ 2109 if (ata_id_has_trim(dev->id)) { 2110 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2111 2112 if (dev->quirks & ATA_QUIRK_MAX_TRIM_128M) 2113 max_blocks = 128 << (20 - SECTOR_SHIFT); 2114 2115 put_unaligned_be64(max_blocks, &rbuf[36]); 2116 put_unaligned_be32(1, &rbuf[28]); 2117 } 2118 2119 return get_unaligned_be16(&rbuf[2]) + 4; 2120 } 2121 2122 /** 2123 * ata_scsiop_inq_b1 - Simulate INQUIRY VPD page B1, Block Device 2124 * Characteristics 2125 * @dev: Target device. 2126 * @cmd: SCSI command of interest. 2127 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2128 * 2129 * Return data for the VPD page B1h (Block Device Characteristics). 2130 * 2131 * LOCKING: 2132 * spin_lock_irqsave(host lock) 2133 */ 2134 static unsigned int ata_scsiop_inq_b1(struct ata_device *dev, 2135 struct scsi_cmnd *cmd, u8 *rbuf) 2136 { 2137 int form_factor = ata_id_form_factor(dev->id); 2138 int media_rotation_rate = ata_id_rotation_rate(dev->id); 2139 u8 zoned = ata_id_zoned_cap(dev->id); 2140 2141 rbuf[1] = 0xb1; 2142 rbuf[3] = 0x3c; 2143 rbuf[4] = media_rotation_rate >> 8; 2144 rbuf[5] = media_rotation_rate; 2145 rbuf[7] = form_factor; 2146 if (zoned) 2147 rbuf[8] = (zoned << 4); 2148 2149 return get_unaligned_be16(&rbuf[2]) + 4; 2150 } 2151 2152 /** 2153 * ata_scsiop_inq_b2 - Simulate INQUIRY VPD page B2, Logical Block 2154 * Provisioning 2155 * @dev: Target device. 2156 * @cmd: SCSI command of interest. 2157 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2158 * 2159 * Return data for the VPD page B2h (Logical Block Provisioning). 2160 * 2161 * LOCKING: 2162 * spin_lock_irqsave(host lock) 2163 */ 2164 static unsigned int ata_scsiop_inq_b2(struct ata_device *dev, 2165 struct scsi_cmnd *cmd, u8 *rbuf) 2166 { 2167 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2168 rbuf[1] = 0xb2; 2169 rbuf[3] = 0x4; 2170 rbuf[5] = 1 << 6; /* TPWS */ 2171 2172 return get_unaligned_be16(&rbuf[2]) + 4; 2173 } 2174 2175 /** 2176 * ata_scsiop_inq_b6 - Simulate INQUIRY VPD page B6, Zoned Block Device 2177 * Characteristics 2178 * @dev: Target device. 2179 * @cmd: SCSI command of interest. 2180 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2181 * 2182 * Return data for the VPD page B2h (Zoned Block Device Characteristics). 2183 * 2184 * LOCKING: 2185 * spin_lock_irqsave(host lock) 2186 */ 2187 static unsigned int ata_scsiop_inq_b6(struct ata_device *dev, 2188 struct scsi_cmnd *cmd, u8 *rbuf) 2189 { 2190 if (!ata_dev_is_zac(dev)) { 2191 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2192 return 0; 2193 } 2194 2195 /* 2196 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2197 */ 2198 rbuf[1] = 0xb6; 2199 rbuf[3] = 0x3C; 2200 2201 /* 2202 * URSWRZ bit is only meaningful for host-managed ZAC drives 2203 */ 2204 if (dev->zac_zoned_cap & 1) 2205 rbuf[4] |= 1; 2206 put_unaligned_be32(dev->zac_zones_optimal_open, &rbuf[8]); 2207 put_unaligned_be32(dev->zac_zones_optimal_nonseq, &rbuf[12]); 2208 put_unaligned_be32(dev->zac_zones_max_open, &rbuf[16]); 2209 2210 return get_unaligned_be16(&rbuf[2]) + 4; 2211 } 2212 2213 /** 2214 * ata_scsiop_inq_b9 - Simulate INQUIRY VPD page B9, Concurrent Positioning 2215 * Ranges 2216 * @dev: Target device. 2217 * @cmd: SCSI command of interest. 2218 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2219 * 2220 * Return data for the VPD page B9h (Concurrent Positioning Ranges). 2221 * 2222 * LOCKING: 2223 * spin_lock_irqsave(host lock) 2224 */ 2225 static unsigned int ata_scsiop_inq_b9(struct ata_device *dev, 2226 struct scsi_cmnd *cmd, u8 *rbuf) 2227 { 2228 struct ata_cpr_log *cpr_log = dev->cpr_log; 2229 u8 *desc = &rbuf[64]; 2230 int i; 2231 2232 if (!cpr_log) { 2233 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2234 return 0; 2235 } 2236 2237 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2238 rbuf[1] = 0xb9; 2239 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2240 2241 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2242 desc[0] = cpr_log->cpr[i].num; 2243 desc[1] = cpr_log->cpr[i].num_storage_elements; 2244 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2245 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2246 } 2247 2248 return get_unaligned_be16(&rbuf[2]) + 4; 2249 } 2250 2251 /** 2252 * ata_scsiop_inquiry - Simulate INQUIRY command 2253 * @dev: Target device. 2254 * @cmd: SCSI command of interest. 2255 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2256 * 2257 * Returns data associated with an INQUIRY command output. 2258 * 2259 * LOCKING: 2260 * spin_lock_irqsave(host lock) 2261 */ 2262 static unsigned int ata_scsiop_inquiry(struct ata_device *dev, 2263 struct scsi_cmnd *cmd, u8 *rbuf) 2264 { 2265 const u8 *scsicmd = cmd->cmnd; 2266 2267 /* is CmdDt set? */ 2268 if (scsicmd[1] & 2) { 2269 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2270 return 0; 2271 } 2272 2273 /* Is EVPD clear? */ 2274 if ((scsicmd[1] & 1) == 0) 2275 return ata_scsiop_inq_std(dev, cmd, rbuf); 2276 2277 switch (scsicmd[2]) { 2278 case 0x00: 2279 return ata_scsiop_inq_00(dev, cmd, rbuf); 2280 case 0x80: 2281 return ata_scsiop_inq_80(dev, cmd, rbuf); 2282 case 0x83: 2283 return ata_scsiop_inq_83(dev, cmd, rbuf); 2284 case 0x89: 2285 return ata_scsiop_inq_89(dev, cmd, rbuf); 2286 case 0xb0: 2287 return ata_scsiop_inq_b0(dev, cmd, rbuf); 2288 case 0xb1: 2289 return ata_scsiop_inq_b1(dev, cmd, rbuf); 2290 case 0xb2: 2291 return ata_scsiop_inq_b2(dev, cmd, rbuf); 2292 case 0xb6: 2293 return ata_scsiop_inq_b6(dev, cmd, rbuf); 2294 case 0xb9: 2295 return ata_scsiop_inq_b9(dev, cmd, rbuf); 2296 default: 2297 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2298 return 0; 2299 } 2300 } 2301 2302 /** 2303 * modecpy - Prepare response for MODE SENSE 2304 * @dest: output buffer 2305 * @src: data being copied 2306 * @n: length of mode page 2307 * @changeable: whether changeable parameters are requested 2308 * 2309 * Generate a generic MODE SENSE page for either current or changeable 2310 * parameters. 2311 * 2312 * LOCKING: 2313 * None. 2314 */ 2315 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2316 { 2317 if (changeable) { 2318 memcpy(dest, src, 2); 2319 memset(dest + 2, 0, n - 2); 2320 } else { 2321 memcpy(dest, src, n); 2322 } 2323 } 2324 2325 /** 2326 * ata_msense_caching - Simulate MODE SENSE caching info page 2327 * @id: device IDENTIFY data 2328 * @buf: output buffer 2329 * @changeable: whether changeable parameters are requested 2330 * 2331 * Generate a caching info page, which conditionally indicates 2332 * write caching to the SCSI layer, depending on device 2333 * capabilities. 2334 * 2335 * LOCKING: 2336 * None. 2337 */ 2338 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2339 { 2340 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2341 if (changeable) { 2342 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2343 } else { 2344 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2345 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2346 } 2347 return sizeof(def_cache_mpage); 2348 } 2349 2350 /* 2351 * Simulate MODE SENSE control mode page, sub-page 0. 2352 */ 2353 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2354 bool changeable) 2355 { 2356 modecpy(buf, def_control_mpage, 2357 sizeof(def_control_mpage), changeable); 2358 if (changeable) { 2359 /* ata_mselect_control() */ 2360 buf[2] |= (1 << 2); 2361 } else { 2362 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2363 2364 /* descriptor format sense data */ 2365 buf[2] |= (d_sense << 2); 2366 } 2367 2368 return sizeof(def_control_mpage); 2369 } 2370 2371 /* 2372 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2373 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2374 * only, take care of overflows. 2375 */ 2376 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2377 { 2378 u32 limit = get_unaligned_le32(buf); 2379 2380 return min_t(u32, limit / 10000, 65535); 2381 } 2382 2383 /* 2384 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2385 * (command duration limits T2A and T2B mode pages). 2386 */ 2387 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2388 u8 spg) 2389 { 2390 u8 *b, *cdl, *desc; 2391 u32 policy; 2392 int i; 2393 2394 if (!(dev->flags & ATA_DFLAG_CDL) || !dev->cdl) 2395 return 0; 2396 2397 cdl = dev->cdl->desc_log_buf; 2398 2399 /* 2400 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2401 * are a header. The PAGE LENGTH field is the size of the page 2402 * excluding the header. 2403 */ 2404 buf[0] = CONTROL_MPAGE; 2405 buf[1] = spg; 2406 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2407 if (spg == CDL_T2A_SUB_MPAGE) { 2408 /* 2409 * Read descriptors map to the T2A page: 2410 * set perf_vs_duration_guidleine. 2411 */ 2412 buf[7] = (cdl[0] & 0x03) << 4; 2413 desc = cdl + 64; 2414 } else { 2415 /* Write descriptors map to the T2B page */ 2416 desc = cdl + 288; 2417 } 2418 2419 /* Fill the T2 page descriptors */ 2420 b = &buf[8]; 2421 policy = get_unaligned_le32(&cdl[0]); 2422 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2423 /* t2cdlunits: fixed to 10ms */ 2424 b[0] = 0x0a; 2425 2426 /* Max inactive time and its policy */ 2427 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2428 b[6] = ((policy >> 8) & 0x0f) << 4; 2429 2430 /* Max active time and its policy */ 2431 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2432 b[6] |= (policy >> 4) & 0x0f; 2433 2434 /* Command duration guideline and its policy */ 2435 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2436 b[14] = policy & 0x0f; 2437 } 2438 2439 return CDL_T2_SUB_MPAGE_LEN; 2440 } 2441 2442 /* 2443 * Simulate MODE SENSE control mode page, sub-page f2h 2444 * (ATA feature control mode page). 2445 */ 2446 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2447 u8 *buf) 2448 { 2449 /* PS=0, SPF=1 */ 2450 buf[0] = CONTROL_MPAGE | (1 << 6); 2451 buf[1] = ATA_FEATURE_SUB_MPAGE; 2452 2453 /* 2454 * The first four bytes of ATA Feature Control mode page are a header. 2455 * The PAGE LENGTH field is the size of the page excluding the header. 2456 */ 2457 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2458 2459 if (dev->flags & ATA_DFLAG_CDL_ENABLED) 2460 buf[4] = 0x02; /* T2A and T2B pages enabled */ 2461 else 2462 buf[4] = 0; 2463 2464 return ATA_FEATURE_SUB_MPAGE_LEN; 2465 } 2466 2467 /** 2468 * ata_msense_control - Simulate MODE SENSE control mode page 2469 * @dev: ATA device of interest 2470 * @buf: output buffer 2471 * @spg: sub-page code 2472 * @changeable: whether changeable parameters are requested 2473 * 2474 * Generate a generic MODE SENSE control mode page. 2475 * 2476 * LOCKING: 2477 * None. 2478 */ 2479 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2480 u8 spg, bool changeable) 2481 { 2482 unsigned int n; 2483 2484 switch (spg) { 2485 case 0: 2486 return ata_msense_control_spg0(dev, buf, changeable); 2487 case CDL_T2A_SUB_MPAGE: 2488 case CDL_T2B_SUB_MPAGE: 2489 return ata_msense_control_spgt2(dev, buf, spg); 2490 case ATA_FEATURE_SUB_MPAGE: 2491 return ata_msense_control_ata_feature(dev, buf); 2492 case ALL_SUB_MPAGES: 2493 n = ata_msense_control_spg0(dev, buf, changeable); 2494 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2495 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2B_SUB_MPAGE); 2496 n += ata_msense_control_ata_feature(dev, buf + n); 2497 return n; 2498 default: 2499 return 0; 2500 } 2501 } 2502 2503 /** 2504 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2505 * @buf: output buffer 2506 * @changeable: whether changeable parameters are requested 2507 * 2508 * Generate a generic MODE SENSE r/w error recovery page. 2509 * 2510 * LOCKING: 2511 * None. 2512 */ 2513 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2514 { 2515 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2516 changeable); 2517 return sizeof(def_rw_recovery_mpage); 2518 } 2519 2520 /** 2521 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2522 * @dev: Target device. 2523 * @cmd: SCSI command of interest. 2524 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2525 * 2526 * Simulate MODE SENSE commands. Assume this is invoked for direct 2527 * access devices (e.g. disks) only. There should be no block 2528 * descriptor for other device types. 2529 * 2530 * LOCKING: 2531 * spin_lock_irqsave(host lock) 2532 */ 2533 static unsigned int ata_scsiop_mode_sense(struct ata_device *dev, 2534 struct scsi_cmnd *cmd, u8 *rbuf) 2535 { 2536 u8 *scsicmd = cmd->cmnd, *p = rbuf; 2537 static const u8 sat_blk_desc[] = { 2538 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2539 0, 2540 0, 0x2, 0x0 /* block length: 512 bytes */ 2541 }; 2542 u8 pg, spg; 2543 unsigned int ebd, page_control, six_byte; 2544 u8 dpofua = 0, bp = 0xff; 2545 u16 fp; 2546 2547 six_byte = (scsicmd[0] == MODE_SENSE); 2548 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2549 /* 2550 * LLBA bit in msense(10) ignored (compliant) 2551 */ 2552 2553 page_control = scsicmd[2] >> 6; 2554 switch (page_control) { 2555 case 0: /* current */ 2556 case 1: /* changeable */ 2557 case 2: /* defaults */ 2558 break; /* supported */ 2559 case 3: /* saved */ 2560 goto saving_not_supp; 2561 default: 2562 fp = 2; 2563 bp = 6; 2564 goto invalid_fld; 2565 } 2566 2567 if (six_byte) 2568 p += 4 + (ebd ? 8 : 0); 2569 else 2570 p += 8 + (ebd ? 8 : 0); 2571 2572 pg = scsicmd[2] & 0x3f; 2573 spg = scsicmd[3]; 2574 2575 /* 2576 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2577 * the control page. 2578 */ 2579 if (spg) { 2580 switch (spg) { 2581 case ALL_SUB_MPAGES: 2582 break; 2583 case CDL_T2A_SUB_MPAGE: 2584 case CDL_T2B_SUB_MPAGE: 2585 case ATA_FEATURE_SUB_MPAGE: 2586 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2587 break; 2588 fallthrough; 2589 default: 2590 fp = 3; 2591 goto invalid_fld; 2592 } 2593 } 2594 2595 switch(pg) { 2596 case RW_RECOVERY_MPAGE: 2597 p += ata_msense_rw_recovery(p, page_control == 1); 2598 break; 2599 2600 case CACHE_MPAGE: 2601 p += ata_msense_caching(dev->id, p, page_control == 1); 2602 break; 2603 2604 case CONTROL_MPAGE: 2605 p += ata_msense_control(dev, p, spg, page_control == 1); 2606 break; 2607 2608 case ALL_MPAGES: 2609 p += ata_msense_rw_recovery(p, page_control == 1); 2610 p += ata_msense_caching(dev->id, p, page_control == 1); 2611 p += ata_msense_control(dev, p, spg, page_control == 1); 2612 break; 2613 2614 default: /* invalid page code */ 2615 fp = 2; 2616 goto invalid_fld; 2617 } 2618 2619 if (dev->flags & ATA_DFLAG_FUA) 2620 dpofua = 1 << 4; 2621 2622 if (six_byte) { 2623 rbuf[0] = p - rbuf - 1; 2624 rbuf[2] |= dpofua; 2625 if (ebd) { 2626 rbuf[3] = sizeof(sat_blk_desc); 2627 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2628 } 2629 2630 return rbuf[0] + 1; 2631 } 2632 2633 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2634 rbuf[3] |= dpofua; 2635 if (ebd) { 2636 rbuf[7] = sizeof(sat_blk_desc); 2637 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2638 } 2639 2640 return get_unaligned_be16(&rbuf[0]) + 2; 2641 2642 invalid_fld: 2643 ata_scsi_set_invalid_field(dev, cmd, fp, bp); 2644 return 0; 2645 2646 saving_not_supp: 2647 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2648 /* "Saving parameters not supported" */ 2649 return 0; 2650 } 2651 2652 /** 2653 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2654 * @dev: Target device. 2655 * @cmd: SCSI command of interest. 2656 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2657 * 2658 * Simulate READ CAPACITY commands. 2659 * 2660 * LOCKING: 2661 * None. 2662 */ 2663 static unsigned int ata_scsiop_read_cap(struct ata_device *dev, 2664 struct scsi_cmnd *cmd, u8 *rbuf) 2665 { 2666 u8 *scsicmd = cmd->cmnd; 2667 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2668 u32 sector_size; /* physical sector size in bytes */ 2669 u8 log2_per_phys; 2670 u16 lowest_aligned; 2671 2672 sector_size = ata_id_logical_sector_size(dev->id); 2673 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2674 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2675 2676 if (scsicmd[0] == READ_CAPACITY) { 2677 if (last_lba >= 0xffffffffULL) 2678 last_lba = 0xffffffff; 2679 2680 /* sector count, 32-bit */ 2681 rbuf[0] = last_lba >> (8 * 3); 2682 rbuf[1] = last_lba >> (8 * 2); 2683 rbuf[2] = last_lba >> (8 * 1); 2684 rbuf[3] = last_lba; 2685 2686 /* sector size */ 2687 rbuf[4] = sector_size >> (8 * 3); 2688 rbuf[5] = sector_size >> (8 * 2); 2689 rbuf[6] = sector_size >> (8 * 1); 2690 rbuf[7] = sector_size; 2691 2692 return 8; 2693 } 2694 2695 /* 2696 * READ CAPACITY 16 command is defined as a service action 2697 * (SERVICE_ACTION_IN_16 command). 2698 */ 2699 if (scsicmd[0] != SERVICE_ACTION_IN_16 || 2700 (scsicmd[1] & 0x1f) != SAI_READ_CAPACITY_16) { 2701 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2702 return 0; 2703 } 2704 2705 /* sector count, 64-bit */ 2706 rbuf[0] = last_lba >> (8 * 7); 2707 rbuf[1] = last_lba >> (8 * 6); 2708 rbuf[2] = last_lba >> (8 * 5); 2709 rbuf[3] = last_lba >> (8 * 4); 2710 rbuf[4] = last_lba >> (8 * 3); 2711 rbuf[5] = last_lba >> (8 * 2); 2712 rbuf[6] = last_lba >> (8 * 1); 2713 rbuf[7] = last_lba; 2714 2715 /* sector size */ 2716 rbuf[ 8] = sector_size >> (8 * 3); 2717 rbuf[ 9] = sector_size >> (8 * 2); 2718 rbuf[10] = sector_size >> (8 * 1); 2719 rbuf[11] = sector_size; 2720 2721 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 2722 rbuf[12] = (1 << 4); /* RC_BASIS */ 2723 rbuf[13] = log2_per_phys; 2724 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2725 rbuf[15] = lowest_aligned; 2726 2727 if (ata_id_has_trim(dev->id) && !(dev->quirks & ATA_QUIRK_NOTRIM)) { 2728 rbuf[14] |= 0x80; /* LBPME */ 2729 2730 if (ata_id_has_zero_after_trim(dev->id) && 2731 dev->quirks & ATA_QUIRK_ZERO_AFTER_TRIM) { 2732 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2733 rbuf[14] |= 0x40; /* LBPRZ */ 2734 } 2735 } 2736 2737 return 16; 2738 } 2739 2740 /** 2741 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2742 * @dev: Target device. 2743 * @cmd: SCSI command of interest. 2744 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2745 * 2746 * Simulate REPORT LUNS command. 2747 * 2748 * LOCKING: 2749 * spin_lock_irqsave(host lock) 2750 */ 2751 static unsigned int ata_scsiop_report_luns(struct ata_device *dev, 2752 struct scsi_cmnd *cmd, u8 *rbuf) 2753 { 2754 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2755 2756 return 16; 2757 } 2758 2759 /* 2760 * ATAPI devices typically report zero for their SCSI version, and sometimes 2761 * deviate from the spec WRT response data format. If SCSI version is 2762 * reported as zero like normal, then we make the following fixups: 2763 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2764 * modern device. 2765 * 2) Ensure response data format / ATAPI information are always correct. 2766 */ 2767 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2768 { 2769 u8 buf[4]; 2770 2771 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2772 if (buf[2] == 0) { 2773 buf[2] = 0x5; 2774 buf[3] = 0x32; 2775 } 2776 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2777 } 2778 2779 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2780 { 2781 struct scsi_cmnd *cmd = qc->scsicmd; 2782 unsigned int err_mask = qc->err_mask; 2783 2784 /* handle completion from EH */ 2785 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2786 2787 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2788 ata_gen_passthru_sense(qc); 2789 2790 /* SCSI EH automatically locks door if sdev->locked is 2791 * set. Sometimes door lock request continues to 2792 * fail, for example, when no media is present. This 2793 * creates a loop - SCSI EH issues door lock which 2794 * fails and gets invoked again to acquire sense data 2795 * for the failed command. 2796 * 2797 * If door lock fails, always clear sdev->locked to 2798 * avoid this infinite loop. 2799 * 2800 * This may happen before SCSI scan is complete. Make 2801 * sure qc->dev->sdev isn't NULL before dereferencing. 2802 */ 2803 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2804 qc->dev->sdev->locked = 0; 2805 2806 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2807 ata_qc_done(qc); 2808 return; 2809 } 2810 2811 /* successful completion path */ 2812 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2813 atapi_fixup_inquiry(cmd); 2814 cmd->result = SAM_STAT_GOOD; 2815 2816 ata_qc_done(qc); 2817 } 2818 /** 2819 * atapi_xlat - Initialize PACKET taskfile 2820 * @qc: command structure to be initialized 2821 * 2822 * LOCKING: 2823 * spin_lock_irqsave(host lock) 2824 * 2825 * RETURNS: 2826 * Zero on success, non-zero on failure. 2827 */ 2828 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2829 { 2830 struct scsi_cmnd *scmd = qc->scsicmd; 2831 struct ata_device *dev = qc->dev; 2832 int nodata = (scmd->sc_data_direction == DMA_NONE); 2833 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2834 unsigned int nbytes; 2835 2836 memset(qc->cdb, 0, dev->cdb_len); 2837 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2838 2839 qc->complete_fn = atapi_qc_complete; 2840 2841 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2842 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2843 qc->tf.flags |= ATA_TFLAG_WRITE; 2844 } 2845 2846 qc->tf.command = ATA_CMD_PACKET; 2847 ata_qc_set_pc_nbytes(qc); 2848 2849 /* check whether ATAPI DMA is safe */ 2850 if (!nodata && !using_pio && atapi_check_dma(qc)) 2851 using_pio = 1; 2852 2853 /* Some controller variants snoop this value for Packet 2854 * transfers to do state machine and FIFO management. Thus we 2855 * want to set it properly, and for DMA where it is 2856 * effectively meaningless. 2857 */ 2858 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2859 2860 /* Most ATAPI devices which honor transfer chunk size don't 2861 * behave according to the spec when odd chunk size which 2862 * matches the transfer length is specified. If the number of 2863 * bytes to transfer is 2n+1. According to the spec, what 2864 * should happen is to indicate that 2n+1 is going to be 2865 * transferred and transfer 2n+2 bytes where the last byte is 2866 * padding. 2867 * 2868 * In practice, this doesn't happen. ATAPI devices first 2869 * indicate and transfer 2n bytes and then indicate and 2870 * transfer 2 bytes where the last byte is padding. 2871 * 2872 * This inconsistency confuses several controllers which 2873 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2874 * These controllers use actual number of transferred bytes to 2875 * update DMA pointer and transfer of 4n+2 bytes make those 2876 * controller push DMA pointer by 4n+4 bytes because SATA data 2877 * FISes are aligned to 4 bytes. This causes data corruption 2878 * and buffer overrun. 2879 * 2880 * Always setting nbytes to even number solves this problem 2881 * because then ATAPI devices don't have to split data at 2n 2882 * boundaries. 2883 */ 2884 if (nbytes & 0x1) 2885 nbytes++; 2886 2887 qc->tf.lbam = (nbytes & 0xFF); 2888 qc->tf.lbah = (nbytes >> 8); 2889 2890 if (nodata) 2891 qc->tf.protocol = ATAPI_PROT_NODATA; 2892 else if (using_pio) 2893 qc->tf.protocol = ATAPI_PROT_PIO; 2894 else { 2895 /* DMA data xfer */ 2896 qc->tf.protocol = ATAPI_PROT_DMA; 2897 qc->tf.feature |= ATAPI_PKT_DMA; 2898 2899 if ((dev->flags & ATA_DFLAG_DMADIR) && 2900 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2901 /* some SATA bridges need us to indicate data xfer direction */ 2902 qc->tf.feature |= ATAPI_DMADIR; 2903 } 2904 2905 2906 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2907 as ATAPI tape drives don't get this right otherwise */ 2908 return 0; 2909 } 2910 2911 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 2912 { 2913 /* 2914 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 2915 * or 2 (IDE master + slave case). However, the former case includes 2916 * libsas hosted devices which are numbered per scsi host, leading 2917 * to devno potentially being larger than 0 but with each struct 2918 * ata_device having its own struct ata_port and struct ata_link. 2919 * To accommodate these, ignore devno and always use device number 0. 2920 */ 2921 if (likely(!sata_pmp_attached(ap))) { 2922 int link_max_devices = ata_link_max_devices(&ap->link); 2923 2924 if (link_max_devices == 1) 2925 return &ap->link.device[0]; 2926 2927 if (devno < link_max_devices) 2928 return &ap->link.device[devno]; 2929 2930 return NULL; 2931 } 2932 2933 /* 2934 * For PMP-attached devices, the device number corresponds to C 2935 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 2936 * for the device. 2937 */ 2938 if (devno < ap->nr_pmp_links) 2939 return &ap->pmp_link[devno].device[0]; 2940 2941 return NULL; 2942 } 2943 2944 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2945 const struct scsi_device *scsidev) 2946 { 2947 int devno; 2948 2949 /* skip commands not addressed to targets we simulate */ 2950 if (!sata_pmp_attached(ap)) { 2951 if (unlikely(scsidev->channel || scsidev->lun)) 2952 return NULL; 2953 devno = scsidev->id; 2954 } else { 2955 if (unlikely(scsidev->id || scsidev->lun)) 2956 return NULL; 2957 devno = scsidev->channel; 2958 } 2959 2960 return ata_find_dev(ap, devno); 2961 } 2962 2963 /** 2964 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2965 * @ap: ATA port to which the device is attached 2966 * @scsidev: SCSI device from which we derive the ATA device 2967 * 2968 * Given various information provided in struct scsi_cmnd, 2969 * map that onto an ATA bus, and using that mapping 2970 * determine which ata_device is associated with the 2971 * SCSI command to be sent. 2972 * 2973 * LOCKING: 2974 * spin_lock_irqsave(host lock) 2975 * 2976 * RETURNS: 2977 * Associated ATA device, or %NULL if not found. 2978 */ 2979 struct ata_device * 2980 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2981 { 2982 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2983 2984 if (unlikely(!dev || !ata_dev_enabled(dev))) 2985 return NULL; 2986 2987 return dev; 2988 } 2989 2990 /* 2991 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2992 * @byte1: Byte 1 from pass-thru CDB. 2993 * 2994 * RETURNS: 2995 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2996 */ 2997 static u8 2998 ata_scsi_map_proto(u8 byte1) 2999 { 3000 switch((byte1 & 0x1e) >> 1) { 3001 case 3: /* Non-data */ 3002 return ATA_PROT_NODATA; 3003 3004 case 6: /* DMA */ 3005 case 10: /* UDMA Data-in */ 3006 case 11: /* UDMA Data-Out */ 3007 return ATA_PROT_DMA; 3008 3009 case 4: /* PIO Data-in */ 3010 case 5: /* PIO Data-out */ 3011 return ATA_PROT_PIO; 3012 3013 case 12: /* FPDMA */ 3014 return ATA_PROT_NCQ; 3015 3016 case 0: /* Hard Reset */ 3017 case 1: /* SRST */ 3018 case 8: /* Device Diagnostic */ 3019 case 9: /* Device Reset */ 3020 case 7: /* DMA Queued */ 3021 case 15: /* Return Response Info */ 3022 default: /* Reserved */ 3023 break; 3024 } 3025 3026 return ATA_PROT_UNKNOWN; 3027 } 3028 3029 /** 3030 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3031 * @qc: command structure to be initialized 3032 * 3033 * Handles either 12, 16, or 32-byte versions of the CDB. 3034 * 3035 * RETURNS: 3036 * Zero on success, non-zero on failure. 3037 */ 3038 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3039 { 3040 struct ata_taskfile *tf = &(qc->tf); 3041 struct scsi_cmnd *scmd = qc->scsicmd; 3042 struct ata_device *dev = qc->dev; 3043 const u8 *cdb = scmd->cmnd; 3044 u16 fp; 3045 u16 cdb_offset = 0; 3046 3047 /* 7Fh variable length cmd means a ata pass-thru(32) */ 3048 if (cdb[0] == VARIABLE_LENGTH_CMD) 3049 cdb_offset = 9; 3050 3051 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 3052 if (tf->protocol == ATA_PROT_UNKNOWN) { 3053 fp = 1; 3054 goto invalid_fld; 3055 } 3056 3057 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 3058 /* 3059 * When T_LENGTH is zero (No data is transferred), dir should 3060 * be DMA_NONE. 3061 */ 3062 if (scmd->sc_data_direction != DMA_NONE) { 3063 fp = 2 + cdb_offset; 3064 goto invalid_fld; 3065 } 3066 3067 if (ata_is_ncq(tf->protocol)) 3068 tf->protocol = ATA_PROT_NCQ_NODATA; 3069 } 3070 3071 /* enable LBA */ 3072 tf->flags |= ATA_TFLAG_LBA; 3073 3074 /* 3075 * 12 and 16 byte CDBs use different offsets to 3076 * provide the various register values. 3077 */ 3078 switch (cdb[0]) { 3079 case ATA_16: 3080 /* 3081 * 16-byte CDB - may contain extended commands. 3082 * 3083 * If that is the case, copy the upper byte register values. 3084 */ 3085 if (cdb[1] & 0x01) { 3086 tf->hob_feature = cdb[3]; 3087 tf->hob_nsect = cdb[5]; 3088 tf->hob_lbal = cdb[7]; 3089 tf->hob_lbam = cdb[9]; 3090 tf->hob_lbah = cdb[11]; 3091 tf->flags |= ATA_TFLAG_LBA48; 3092 } else 3093 tf->flags &= ~ATA_TFLAG_LBA48; 3094 3095 /* 3096 * Always copy low byte, device and command registers. 3097 */ 3098 tf->feature = cdb[4]; 3099 tf->nsect = cdb[6]; 3100 tf->lbal = cdb[8]; 3101 tf->lbam = cdb[10]; 3102 tf->lbah = cdb[12]; 3103 tf->device = cdb[13]; 3104 tf->command = cdb[14]; 3105 break; 3106 case ATA_12: 3107 /* 3108 * 12-byte CDB - incapable of extended commands. 3109 */ 3110 tf->flags &= ~ATA_TFLAG_LBA48; 3111 3112 tf->feature = cdb[3]; 3113 tf->nsect = cdb[4]; 3114 tf->lbal = cdb[5]; 3115 tf->lbam = cdb[6]; 3116 tf->lbah = cdb[7]; 3117 tf->device = cdb[8]; 3118 tf->command = cdb[9]; 3119 break; 3120 default: 3121 /* 3122 * 32-byte CDB - may contain extended command fields. 3123 * 3124 * If that is the case, copy the upper byte register values. 3125 */ 3126 if (cdb[10] & 0x01) { 3127 tf->hob_feature = cdb[20]; 3128 tf->hob_nsect = cdb[22]; 3129 tf->hob_lbal = cdb[16]; 3130 tf->hob_lbam = cdb[15]; 3131 tf->hob_lbah = cdb[14]; 3132 tf->flags |= ATA_TFLAG_LBA48; 3133 } else 3134 tf->flags &= ~ATA_TFLAG_LBA48; 3135 3136 tf->feature = cdb[21]; 3137 tf->nsect = cdb[23]; 3138 tf->lbal = cdb[19]; 3139 tf->lbam = cdb[18]; 3140 tf->lbah = cdb[17]; 3141 tf->device = cdb[24]; 3142 tf->command = cdb[25]; 3143 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3144 break; 3145 } 3146 3147 /* For NCQ commands copy the tag value */ 3148 if (ata_is_ncq(tf->protocol)) 3149 tf->nsect = qc->hw_tag << 3; 3150 3151 /* enforce correct master/slave bit */ 3152 tf->device = dev->devno ? 3153 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3154 3155 switch (tf->command) { 3156 /* READ/WRITE LONG use a non-standard sect_size */ 3157 case ATA_CMD_READ_LONG: 3158 case ATA_CMD_READ_LONG_ONCE: 3159 case ATA_CMD_WRITE_LONG: 3160 case ATA_CMD_WRITE_LONG_ONCE: 3161 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3162 fp = 1; 3163 goto invalid_fld; 3164 } 3165 qc->sect_size = scsi_bufflen(scmd); 3166 break; 3167 3168 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3169 case ATA_CMD_CFA_WRITE_NE: 3170 case ATA_CMD_CFA_TRANS_SECT: 3171 case ATA_CMD_CFA_WRITE_MULT_NE: 3172 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3173 case ATA_CMD_READ: 3174 case ATA_CMD_READ_EXT: 3175 case ATA_CMD_READ_QUEUED: 3176 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3177 case ATA_CMD_FPDMA_READ: 3178 case ATA_CMD_READ_MULTI: 3179 case ATA_CMD_READ_MULTI_EXT: 3180 case ATA_CMD_PIO_READ: 3181 case ATA_CMD_PIO_READ_EXT: 3182 case ATA_CMD_READ_STREAM_DMA_EXT: 3183 case ATA_CMD_READ_STREAM_EXT: 3184 case ATA_CMD_VERIFY: 3185 case ATA_CMD_VERIFY_EXT: 3186 case ATA_CMD_WRITE: 3187 case ATA_CMD_WRITE_EXT: 3188 case ATA_CMD_WRITE_FUA_EXT: 3189 case ATA_CMD_WRITE_QUEUED: 3190 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3191 case ATA_CMD_FPDMA_WRITE: 3192 case ATA_CMD_WRITE_MULTI: 3193 case ATA_CMD_WRITE_MULTI_EXT: 3194 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3195 case ATA_CMD_PIO_WRITE: 3196 case ATA_CMD_PIO_WRITE_EXT: 3197 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3198 case ATA_CMD_WRITE_STREAM_EXT: 3199 qc->sect_size = scmd->device->sector_size; 3200 break; 3201 3202 /* Everything else uses 512 byte "sectors" */ 3203 default: 3204 qc->sect_size = ATA_SECT_SIZE; 3205 } 3206 3207 /* 3208 * Set flags so that all registers will be written, pass on 3209 * write indication (used for PIO/DMA setup), result TF is 3210 * copied back and we don't whine too much about its failure. 3211 */ 3212 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3213 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3214 tf->flags |= ATA_TFLAG_WRITE; 3215 3216 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3217 3218 /* 3219 * Set transfer length. 3220 * 3221 * TODO: find out if we need to do more here to 3222 * cover scatter/gather case. 3223 */ 3224 ata_qc_set_pc_nbytes(qc); 3225 3226 /* We may not issue DMA commands if no DMA mode is set */ 3227 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3228 fp = 1; 3229 goto invalid_fld; 3230 } 3231 3232 /* We may not issue NCQ commands to devices not supporting NCQ */ 3233 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3234 fp = 1; 3235 goto invalid_fld; 3236 } 3237 3238 /* sanity check for pio multi commands */ 3239 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3240 fp = 1; 3241 goto invalid_fld; 3242 } 3243 3244 if (is_multi_taskfile(tf)) { 3245 unsigned int multi_count = 1 << (cdb[1] >> 5); 3246 3247 /* compare the passed through multi_count 3248 * with the cached multi_count of libata 3249 */ 3250 if (multi_count != dev->multi_count) 3251 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3252 multi_count); 3253 } 3254 3255 /* 3256 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3257 * SET_FEATURES - XFER MODE must be preceded/succeeded 3258 * by an update to hardware-specific registers for each 3259 * controller (i.e. the reason for ->set_piomode(), 3260 * ->set_dmamode(), and ->post_set_mode() hooks). 3261 */ 3262 if (tf->command == ATA_CMD_SET_FEATURES && 3263 tf->feature == SETFEATURES_XFER) { 3264 fp = (cdb[0] == ATA_16) ? 4 : 3; 3265 goto invalid_fld; 3266 } 3267 3268 /* 3269 * Filter TPM commands by default. These provide an 3270 * essentially uncontrolled encrypted "back door" between 3271 * applications and the disk. Set libata.allow_tpm=1 if you 3272 * have a real reason for wanting to use them. This ensures 3273 * that installed software cannot easily mess stuff up without 3274 * user intent. DVR type users will probably ship with this enabled 3275 * for movie content management. 3276 * 3277 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3278 * for this and should do in future but that it is not sufficient as 3279 * DCS is an optional feature set. Thus we also do the software filter 3280 * so that we comply with the TC consortium stated goal that the user 3281 * can turn off TC features of their system. 3282 */ 3283 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3284 fp = (cdb[0] == ATA_16) ? 14 : 9; 3285 goto invalid_fld; 3286 } 3287 3288 return 0; 3289 3290 invalid_fld: 3291 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3292 return 1; 3293 } 3294 3295 /** 3296 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3297 * @cmd: SCSI command being translated 3298 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3299 * @sector: Starting sector 3300 * @count: Total Range of request in logical sectors 3301 * 3302 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3303 * descriptor. 3304 * 3305 * Upto 64 entries of the format: 3306 * 63:48 Range Length 3307 * 47:0 LBA 3308 * 3309 * Range Length of 0 is ignored. 3310 * LBA's should be sorted order and not overlap. 3311 * 3312 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3313 * 3314 * Return: Number of bytes copied into sglist. 3315 */ 3316 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3317 u64 sector, u32 count) 3318 { 3319 struct scsi_device *sdp = cmd->device; 3320 size_t len = sdp->sector_size; 3321 size_t r; 3322 __le64 *buf; 3323 u32 i = 0; 3324 unsigned long flags; 3325 3326 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3327 3328 if (len > ATA_SCSI_RBUF_SIZE) 3329 len = ATA_SCSI_RBUF_SIZE; 3330 3331 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3332 buf = ((void *)ata_scsi_rbuf); 3333 memset(buf, 0, len); 3334 while (i < trmax) { 3335 u64 entry = sector | 3336 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3337 buf[i++] = __cpu_to_le64(entry); 3338 if (count <= 0xffff) 3339 break; 3340 count -= 0xffff; 3341 sector += 0xffff; 3342 } 3343 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3344 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3345 3346 return r; 3347 } 3348 3349 /** 3350 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3351 * @qc: Command to be translated 3352 * 3353 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3354 * an SCT Write Same command. 3355 * Based on WRITE SAME has the UNMAP flag: 3356 * 3357 * - When set translate to DSM TRIM 3358 * - When clear translate to SCT Write Same 3359 */ 3360 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3361 { 3362 struct ata_taskfile *tf = &qc->tf; 3363 struct scsi_cmnd *scmd = qc->scsicmd; 3364 struct scsi_device *sdp = scmd->device; 3365 size_t len = sdp->sector_size; 3366 struct ata_device *dev = qc->dev; 3367 const u8 *cdb = scmd->cmnd; 3368 u64 block; 3369 u32 n_block; 3370 const u32 trmax = len >> 3; 3371 u32 size; 3372 u16 fp; 3373 u8 bp = 0xff; 3374 u8 unmap = cdb[1] & 0x8; 3375 3376 /* we may not issue DMA commands if no DMA mode is set */ 3377 if (unlikely(!ata_dma_enabled(dev))) 3378 goto invalid_opcode; 3379 3380 /* 3381 * We only allow sending this command through the block layer, 3382 * as it modifies the DATA OUT buffer, which would corrupt user 3383 * memory for SG_IO commands. 3384 */ 3385 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3386 goto invalid_opcode; 3387 3388 if (unlikely(scmd->cmd_len < 16)) { 3389 fp = 15; 3390 goto invalid_fld; 3391 } 3392 scsi_16_lba_len(cdb, &block, &n_block); 3393 3394 if (!unmap || (dev->quirks & ATA_QUIRK_NOTRIM) || 3395 !ata_id_has_trim(dev->id)) { 3396 fp = 1; 3397 bp = 3; 3398 goto invalid_fld; 3399 } 3400 /* If the request is too large the cmd is invalid */ 3401 if (n_block > 0xffff * trmax) { 3402 fp = 2; 3403 goto invalid_fld; 3404 } 3405 3406 /* 3407 * WRITE SAME always has a sector sized buffer as payload, this 3408 * should never be a multiple entry S/G list. 3409 */ 3410 if (!scsi_sg_count(scmd)) 3411 goto invalid_param_len; 3412 3413 /* 3414 * size must match sector size in bytes 3415 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3416 * is defined as number of 512 byte blocks to be transferred. 3417 */ 3418 3419 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3420 if (size != len) 3421 goto invalid_param_len; 3422 3423 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3424 /* Newer devices support queued TRIM commands */ 3425 tf->protocol = ATA_PROT_NCQ; 3426 tf->command = ATA_CMD_FPDMA_SEND; 3427 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3428 tf->nsect = qc->hw_tag << 3; 3429 tf->hob_feature = (size / 512) >> 8; 3430 tf->feature = size / 512; 3431 3432 tf->auxiliary = 1; 3433 } else { 3434 tf->protocol = ATA_PROT_DMA; 3435 tf->hob_feature = 0; 3436 tf->feature = ATA_DSM_TRIM; 3437 tf->hob_nsect = (size / 512) >> 8; 3438 tf->nsect = size / 512; 3439 tf->command = ATA_CMD_DSM; 3440 } 3441 3442 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3443 ATA_TFLAG_WRITE; 3444 3445 ata_qc_set_pc_nbytes(qc); 3446 3447 return 0; 3448 3449 invalid_fld: 3450 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3451 return 1; 3452 invalid_param_len: 3453 /* "Parameter list length error" */ 3454 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3455 return 1; 3456 invalid_opcode: 3457 /* "Invalid command operation code" */ 3458 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3459 return 1; 3460 } 3461 3462 /** 3463 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3464 * @dev: Target device. 3465 * @cmd: SCSI command of interest. 3466 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3467 * 3468 * Yields a subset to satisfy scsi_report_opcode() 3469 * 3470 * LOCKING: 3471 * spin_lock_irqsave(host lock) 3472 */ 3473 static unsigned int ata_scsiop_maint_in(struct ata_device *dev, 3474 struct scsi_cmnd *cmd, u8 *rbuf) 3475 { 3476 u8 *cdb = cmd->cmnd; 3477 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3478 3479 if ((cdb[1] & 0x1f) != MI_REPORT_SUPPORTED_OPERATION_CODES) { 3480 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 3481 return 0; 3482 } 3483 3484 if (cdb[2] != 1 && cdb[2] != 3) { 3485 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3486 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 3487 return 0; 3488 } 3489 3490 switch (cdb[3]) { 3491 case INQUIRY: 3492 case MODE_SENSE: 3493 case MODE_SENSE_10: 3494 case READ_CAPACITY: 3495 case SERVICE_ACTION_IN_16: 3496 case REPORT_LUNS: 3497 case REQUEST_SENSE: 3498 case SYNCHRONIZE_CACHE: 3499 case SYNCHRONIZE_CACHE_16: 3500 case REZERO_UNIT: 3501 case SEEK_6: 3502 case SEEK_10: 3503 case TEST_UNIT_READY: 3504 case SEND_DIAGNOSTIC: 3505 case MAINTENANCE_IN: 3506 case READ_6: 3507 case READ_10: 3508 case WRITE_6: 3509 case WRITE_10: 3510 case ATA_12: 3511 case ATA_16: 3512 case VERIFY: 3513 case VERIFY_16: 3514 case MODE_SELECT: 3515 case MODE_SELECT_10: 3516 case START_STOP: 3517 supported = 3; 3518 break; 3519 case READ_16: 3520 supported = 3; 3521 if (dev->flags & ATA_DFLAG_CDL) { 3522 /* 3523 * CDL read descriptors map to the T2A page, that is, 3524 * rwcdlp = 0x01 and cdlp = 0x01 3525 */ 3526 rwcdlp = 0x01; 3527 cdlp = 0x01 << 3; 3528 } 3529 break; 3530 case WRITE_16: 3531 supported = 3; 3532 if (dev->flags & ATA_DFLAG_CDL) { 3533 /* 3534 * CDL write descriptors map to the T2B page, that is, 3535 * rwcdlp = 0x01 and cdlp = 0x02 3536 */ 3537 rwcdlp = 0x01; 3538 cdlp = 0x02 << 3; 3539 } 3540 break; 3541 case ZBC_IN: 3542 case ZBC_OUT: 3543 if (ata_id_zoned_cap(dev->id) || 3544 dev->class == ATA_DEV_ZAC) 3545 supported = 3; 3546 break; 3547 case SECURITY_PROTOCOL_IN: 3548 case SECURITY_PROTOCOL_OUT: 3549 if (dev->flags & ATA_DFLAG_TRUSTED) 3550 supported = 3; 3551 break; 3552 default: 3553 break; 3554 } 3555 3556 /* One command format */ 3557 rbuf[0] = rwcdlp; 3558 rbuf[1] = cdlp | supported; 3559 3560 return 4; 3561 } 3562 3563 /** 3564 * ata_scsi_report_zones_complete - convert ATA output 3565 * @qc: command structure returning the data 3566 * 3567 * Convert T-13 little-endian field representation into 3568 * T-10 big-endian field representation. 3569 * What a mess. 3570 */ 3571 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3572 { 3573 struct scsi_cmnd *scmd = qc->scsicmd; 3574 struct sg_mapping_iter miter; 3575 unsigned long flags; 3576 unsigned int bytes = 0; 3577 3578 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3579 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3580 3581 local_irq_save(flags); 3582 while (sg_miter_next(&miter)) { 3583 unsigned int offset = 0; 3584 3585 if (bytes == 0) { 3586 char *hdr; 3587 u32 list_length; 3588 u64 max_lba, opt_lba; 3589 u16 same; 3590 3591 /* Swizzle header */ 3592 hdr = miter.addr; 3593 list_length = get_unaligned_le32(&hdr[0]); 3594 same = get_unaligned_le16(&hdr[4]); 3595 max_lba = get_unaligned_le64(&hdr[8]); 3596 opt_lba = get_unaligned_le64(&hdr[16]); 3597 put_unaligned_be32(list_length, &hdr[0]); 3598 hdr[4] = same & 0xf; 3599 put_unaligned_be64(max_lba, &hdr[8]); 3600 put_unaligned_be64(opt_lba, &hdr[16]); 3601 offset += 64; 3602 bytes += 64; 3603 } 3604 while (offset < miter.length) { 3605 char *rec; 3606 u8 cond, type, non_seq, reset; 3607 u64 size, start, wp; 3608 3609 /* Swizzle zone descriptor */ 3610 rec = miter.addr + offset; 3611 type = rec[0] & 0xf; 3612 cond = (rec[1] >> 4) & 0xf; 3613 non_seq = (rec[1] & 2); 3614 reset = (rec[1] & 1); 3615 size = get_unaligned_le64(&rec[8]); 3616 start = get_unaligned_le64(&rec[16]); 3617 wp = get_unaligned_le64(&rec[24]); 3618 rec[0] = type; 3619 rec[1] = (cond << 4) | non_seq | reset; 3620 put_unaligned_be64(size, &rec[8]); 3621 put_unaligned_be64(start, &rec[16]); 3622 put_unaligned_be64(wp, &rec[24]); 3623 WARN_ON(offset + 64 > miter.length); 3624 offset += 64; 3625 bytes += 64; 3626 } 3627 } 3628 sg_miter_stop(&miter); 3629 local_irq_restore(flags); 3630 3631 ata_scsi_qc_complete(qc); 3632 } 3633 3634 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3635 { 3636 struct ata_taskfile *tf = &qc->tf; 3637 struct scsi_cmnd *scmd = qc->scsicmd; 3638 const u8 *cdb = scmd->cmnd; 3639 u16 sect, fp = (u16)-1; 3640 u8 sa, options, bp = 0xff; 3641 u64 block; 3642 u32 n_block; 3643 3644 if (unlikely(scmd->cmd_len < 16)) { 3645 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3646 scmd->cmd_len); 3647 fp = 15; 3648 goto invalid_fld; 3649 } 3650 scsi_16_lba_len(cdb, &block, &n_block); 3651 if (n_block != scsi_bufflen(scmd)) { 3652 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3653 n_block, scsi_bufflen(scmd)); 3654 goto invalid_param_len; 3655 } 3656 sa = cdb[1] & 0x1f; 3657 if (sa != ZI_REPORT_ZONES) { 3658 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3659 fp = 1; 3660 goto invalid_fld; 3661 } 3662 /* 3663 * ZAC allows only for transfers in 512 byte blocks, 3664 * and uses a 16 bit value for the transfer count. 3665 */ 3666 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3667 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3668 goto invalid_param_len; 3669 } 3670 sect = n_block / 512; 3671 options = cdb[14] & 0xbf; 3672 3673 if (ata_ncq_enabled(qc->dev) && 3674 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3675 tf->protocol = ATA_PROT_NCQ; 3676 tf->command = ATA_CMD_FPDMA_RECV; 3677 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3678 tf->nsect = qc->hw_tag << 3; 3679 tf->feature = sect & 0xff; 3680 tf->hob_feature = (sect >> 8) & 0xff; 3681 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3682 } else { 3683 tf->command = ATA_CMD_ZAC_MGMT_IN; 3684 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3685 tf->protocol = ATA_PROT_DMA; 3686 tf->hob_feature = options; 3687 tf->hob_nsect = (sect >> 8) & 0xff; 3688 tf->nsect = sect & 0xff; 3689 } 3690 tf->device = ATA_LBA; 3691 tf->lbah = (block >> 16) & 0xff; 3692 tf->lbam = (block >> 8) & 0xff; 3693 tf->lbal = block & 0xff; 3694 tf->hob_lbah = (block >> 40) & 0xff; 3695 tf->hob_lbam = (block >> 32) & 0xff; 3696 tf->hob_lbal = (block >> 24) & 0xff; 3697 3698 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3699 qc->flags |= ATA_QCFLAG_RESULT_TF; 3700 3701 ata_qc_set_pc_nbytes(qc); 3702 3703 qc->complete_fn = ata_scsi_report_zones_complete; 3704 3705 return 0; 3706 3707 invalid_fld: 3708 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3709 return 1; 3710 3711 invalid_param_len: 3712 /* "Parameter list length error" */ 3713 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3714 return 1; 3715 } 3716 3717 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3718 { 3719 struct ata_taskfile *tf = &qc->tf; 3720 struct scsi_cmnd *scmd = qc->scsicmd; 3721 struct ata_device *dev = qc->dev; 3722 const u8 *cdb = scmd->cmnd; 3723 u8 all, sa; 3724 u64 block; 3725 u32 n_block; 3726 u16 fp = (u16)-1; 3727 3728 if (unlikely(scmd->cmd_len < 16)) { 3729 fp = 15; 3730 goto invalid_fld; 3731 } 3732 3733 sa = cdb[1] & 0x1f; 3734 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3735 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3736 fp = 1; 3737 goto invalid_fld; 3738 } 3739 3740 scsi_16_lba_len(cdb, &block, &n_block); 3741 if (n_block) { 3742 /* 3743 * ZAC MANAGEMENT OUT doesn't define any length 3744 */ 3745 goto invalid_param_len; 3746 } 3747 3748 all = cdb[14] & 0x1; 3749 if (all) { 3750 /* 3751 * Ignore the block address (zone ID) as defined by ZBC. 3752 */ 3753 block = 0; 3754 } else if (block >= dev->n_sectors) { 3755 /* 3756 * Block must be a valid zone ID (a zone start LBA). 3757 */ 3758 fp = 2; 3759 goto invalid_fld; 3760 } 3761 3762 if (ata_ncq_enabled(qc->dev) && 3763 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3764 tf->protocol = ATA_PROT_NCQ_NODATA; 3765 tf->command = ATA_CMD_NCQ_NON_DATA; 3766 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3767 tf->nsect = qc->hw_tag << 3; 3768 tf->auxiliary = sa | ((u16)all << 8); 3769 } else { 3770 tf->protocol = ATA_PROT_NODATA; 3771 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3772 tf->feature = sa; 3773 tf->hob_feature = all; 3774 } 3775 tf->lbah = (block >> 16) & 0xff; 3776 tf->lbam = (block >> 8) & 0xff; 3777 tf->lbal = block & 0xff; 3778 tf->hob_lbah = (block >> 40) & 0xff; 3779 tf->hob_lbam = (block >> 32) & 0xff; 3780 tf->hob_lbal = (block >> 24) & 0xff; 3781 tf->device = ATA_LBA; 3782 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3783 3784 return 0; 3785 3786 invalid_fld: 3787 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3788 return 1; 3789 invalid_param_len: 3790 /* "Parameter list length error" */ 3791 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3792 return 1; 3793 } 3794 3795 /** 3796 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3797 * @qc: Storage for translated ATA taskfile 3798 * @buf: input buffer 3799 * @len: number of valid bytes in the input buffer 3800 * @fp: out parameter for the failed field on error 3801 * 3802 * Prepare a taskfile to modify caching information for the device. 3803 * 3804 * LOCKING: 3805 * None. 3806 */ 3807 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3808 const u8 *buf, int len, u16 *fp) 3809 { 3810 struct ata_taskfile *tf = &qc->tf; 3811 struct ata_device *dev = qc->dev; 3812 u8 mpage[CACHE_MPAGE_LEN]; 3813 u8 wce; 3814 int i; 3815 3816 /* 3817 * The first two bytes of def_cache_mpage are a header, so offsets 3818 * in mpage are off by 2 compared to buf. Same for len. 3819 */ 3820 3821 if (len != CACHE_MPAGE_LEN - 2) { 3822 *fp = min(len, CACHE_MPAGE_LEN - 2); 3823 return -EINVAL; 3824 } 3825 3826 wce = buf[0] & (1 << 2); 3827 3828 /* 3829 * Check that read-only bits are not modified. 3830 */ 3831 ata_msense_caching(dev->id, mpage, false); 3832 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3833 if (i == 0) 3834 continue; 3835 if (mpage[i + 2] != buf[i]) { 3836 *fp = i; 3837 return -EINVAL; 3838 } 3839 } 3840 3841 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3842 tf->protocol = ATA_PROT_NODATA; 3843 tf->nsect = 0; 3844 tf->command = ATA_CMD_SET_FEATURES; 3845 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3846 return 0; 3847 } 3848 3849 /* 3850 * Simulate MODE SELECT control mode page, sub-page 0. 3851 */ 3852 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3853 const u8 *buf, int len, u16 *fp) 3854 { 3855 struct ata_device *dev = qc->dev; 3856 u8 mpage[CONTROL_MPAGE_LEN]; 3857 u8 d_sense; 3858 int i; 3859 3860 /* 3861 * The first two bytes of def_control_mpage are a header, so offsets 3862 * in mpage are off by 2 compared to buf. Same for len. 3863 */ 3864 3865 if (len != CONTROL_MPAGE_LEN - 2) { 3866 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3867 return -EINVAL; 3868 } 3869 3870 d_sense = buf[0] & (1 << 2); 3871 3872 /* 3873 * Check that read-only bits are not modified. 3874 */ 3875 ata_msense_control_spg0(dev, mpage, false); 3876 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3877 if (i == 0) 3878 continue; 3879 if (mpage[2 + i] != buf[i]) { 3880 *fp = i; 3881 return -EINVAL; 3882 } 3883 } 3884 if (d_sense & (1 << 2)) 3885 dev->flags |= ATA_DFLAG_D_SENSE; 3886 else 3887 dev->flags &= ~ATA_DFLAG_D_SENSE; 3888 return 0; 3889 } 3890 3891 /* 3892 * Translate MODE SELECT control mode page, sub-page f2h (ATA feature mode 3893 * page) into a SET FEATURES command. 3894 */ 3895 static int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 3896 const u8 *buf, int len, u16 *fp) 3897 { 3898 struct ata_device *dev = qc->dev; 3899 struct ata_taskfile *tf = &qc->tf; 3900 u8 cdl_action; 3901 3902 /* 3903 * The first four bytes of ATA Feature Control mode page are a header, 3904 * so offsets in mpage are off by 4 compared to buf. Same for len. 3905 */ 3906 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 3907 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 3908 return -EINVAL; 3909 } 3910 3911 /* Check cdl_ctrl */ 3912 switch (buf[0] & 0x03) { 3913 case 0: 3914 /* Disable CDL */ 3915 ata_dev_dbg(dev, "Disabling CDL\n"); 3916 cdl_action = 0; 3917 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 3918 break; 3919 case 0x02: 3920 /* 3921 * Enable CDL. Since CDL is mutually exclusive with NCQ 3922 * priority, allow this only if NCQ priority is disabled. 3923 */ 3924 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 3925 ata_dev_err(dev, 3926 "NCQ priority must be disabled to enable CDL\n"); 3927 return -EINVAL; 3928 } 3929 ata_dev_dbg(dev, "Enabling CDL\n"); 3930 cdl_action = 1; 3931 dev->flags |= ATA_DFLAG_CDL_ENABLED; 3932 break; 3933 default: 3934 *fp = 0; 3935 return -EINVAL; 3936 } 3937 3938 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3939 tf->protocol = ATA_PROT_NODATA; 3940 tf->command = ATA_CMD_SET_FEATURES; 3941 tf->feature = SETFEATURES_CDL; 3942 tf->nsect = cdl_action; 3943 3944 return 1; 3945 } 3946 3947 /** 3948 * ata_mselect_control - Simulate MODE SELECT for control page 3949 * @qc: Storage for translated ATA taskfile 3950 * @spg: target sub-page of the control page 3951 * @buf: input buffer 3952 * @len: number of valid bytes in the input buffer 3953 * @fp: out parameter for the failed field on error 3954 * 3955 * Prepare a taskfile to modify caching information for the device. 3956 * 3957 * LOCKING: 3958 * None. 3959 */ 3960 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 3961 const u8 *buf, int len, u16 *fp) 3962 { 3963 switch (spg) { 3964 case 0: 3965 return ata_mselect_control_spg0(qc, buf, len, fp); 3966 case ATA_FEATURE_SUB_MPAGE: 3967 return ata_mselect_control_ata_feature(qc, buf, len, fp); 3968 default: 3969 return -EINVAL; 3970 } 3971 } 3972 3973 /** 3974 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3975 * @qc: Storage for translated ATA taskfile 3976 * 3977 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3978 * Assume this is invoked for direct access devices (e.g. disks) only. 3979 * There should be no block descriptor for other device types. 3980 * 3981 * LOCKING: 3982 * spin_lock_irqsave(host lock) 3983 */ 3984 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3985 { 3986 struct scsi_cmnd *scmd = qc->scsicmd; 3987 const u8 *cdb = scmd->cmnd; 3988 u8 pg, spg; 3989 unsigned six_byte, pg_len, hdr_len, bd_len; 3990 int len, ret; 3991 u16 fp = (u16)-1; 3992 u8 bp = 0xff; 3993 u8 buffer[64]; 3994 const u8 *p = buffer; 3995 3996 six_byte = (cdb[0] == MODE_SELECT); 3997 if (six_byte) { 3998 if (scmd->cmd_len < 5) { 3999 fp = 4; 4000 goto invalid_fld; 4001 } 4002 4003 len = cdb[4]; 4004 hdr_len = 4; 4005 } else { 4006 if (scmd->cmd_len < 9) { 4007 fp = 8; 4008 goto invalid_fld; 4009 } 4010 4011 len = get_unaligned_be16(&cdb[7]); 4012 hdr_len = 8; 4013 } 4014 4015 /* We only support PF=1, SP=0. */ 4016 if ((cdb[1] & 0x11) != 0x10) { 4017 fp = 1; 4018 bp = (cdb[1] & 0x01) ? 1 : 5; 4019 goto invalid_fld; 4020 } 4021 4022 /* Test early for possible overrun. */ 4023 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 4024 goto invalid_param_len; 4025 4026 /* Move past header and block descriptors. */ 4027 if (len < hdr_len) 4028 goto invalid_param_len; 4029 4030 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 4031 buffer, sizeof(buffer))) 4032 goto invalid_param_len; 4033 4034 if (six_byte) 4035 bd_len = p[3]; 4036 else 4037 bd_len = get_unaligned_be16(&p[6]); 4038 4039 len -= hdr_len; 4040 p += hdr_len; 4041 if (len < bd_len) 4042 goto invalid_param_len; 4043 if (bd_len != 0 && bd_len != 8) { 4044 fp = (six_byte) ? 3 : 6; 4045 fp += bd_len + hdr_len; 4046 goto invalid_param; 4047 } 4048 4049 len -= bd_len; 4050 p += bd_len; 4051 if (len == 0) 4052 goto skip; 4053 4054 /* Parse both possible formats for the mode page headers. */ 4055 pg = p[0] & 0x3f; 4056 if (p[0] & 0x40) { 4057 if (len < 4) 4058 goto invalid_param_len; 4059 4060 spg = p[1]; 4061 pg_len = get_unaligned_be16(&p[2]); 4062 p += 4; 4063 len -= 4; 4064 } else { 4065 if (len < 2) 4066 goto invalid_param_len; 4067 4068 spg = 0; 4069 pg_len = p[1]; 4070 p += 2; 4071 len -= 2; 4072 } 4073 4074 /* 4075 * Supported subpages: all subpages and ATA feature sub-page f2h of 4076 * the control page. 4077 */ 4078 if (spg) { 4079 switch (spg) { 4080 case ALL_SUB_MPAGES: 4081 /* All subpages is not supported for the control page */ 4082 if (pg == CONTROL_MPAGE) { 4083 fp = (p[0] & 0x40) ? 1 : 0; 4084 fp += hdr_len + bd_len; 4085 goto invalid_param; 4086 } 4087 break; 4088 case ATA_FEATURE_SUB_MPAGE: 4089 if (qc->dev->flags & ATA_DFLAG_CDL && 4090 pg == CONTROL_MPAGE) 4091 break; 4092 fallthrough; 4093 default: 4094 fp = (p[0] & 0x40) ? 1 : 0; 4095 fp += hdr_len + bd_len; 4096 goto invalid_param; 4097 } 4098 } 4099 if (pg_len > len) 4100 goto invalid_param_len; 4101 4102 switch (pg) { 4103 case CACHE_MPAGE: 4104 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4105 fp += hdr_len + bd_len; 4106 goto invalid_param; 4107 } 4108 break; 4109 case CONTROL_MPAGE: 4110 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 4111 if (ret < 0) { 4112 fp += hdr_len + bd_len; 4113 goto invalid_param; 4114 } 4115 if (!ret) 4116 goto skip; /* No ATA command to send */ 4117 break; 4118 default: 4119 /* Invalid page code */ 4120 fp = bd_len + hdr_len; 4121 goto invalid_param; 4122 } 4123 4124 /* 4125 * Only one page has changeable data, so we only support setting one 4126 * page at a time. 4127 */ 4128 if (len > pg_len) 4129 goto invalid_param; 4130 4131 return 0; 4132 4133 invalid_fld: 4134 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4135 return 1; 4136 4137 invalid_param: 4138 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4139 return 1; 4140 4141 invalid_param_len: 4142 /* "Parameter list length error" */ 4143 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4144 return 1; 4145 4146 skip: 4147 scmd->result = SAM_STAT_GOOD; 4148 return 1; 4149 } 4150 4151 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4152 { 4153 if (len == 0) 4154 return ATA_CMD_TRUSTED_NONDATA; 4155 else if (send) 4156 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4157 else 4158 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4159 } 4160 4161 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4162 { 4163 struct scsi_cmnd *scmd = qc->scsicmd; 4164 const u8 *cdb = scmd->cmnd; 4165 struct ata_taskfile *tf = &qc->tf; 4166 u8 secp = cdb[1]; 4167 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4168 u16 spsp = get_unaligned_be16(&cdb[2]); 4169 u32 len = get_unaligned_be32(&cdb[6]); 4170 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4171 4172 /* 4173 * We don't support the ATA "security" protocol. 4174 */ 4175 if (secp == 0xef) { 4176 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4177 return 1; 4178 } 4179 4180 if (cdb[4] & 7) { /* INC_512 */ 4181 if (len > 0xffff) { 4182 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4183 return 1; 4184 } 4185 } else { 4186 if (len > 0x01fffe00) { 4187 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4188 return 1; 4189 } 4190 4191 /* convert to the sector-based ATA addressing */ 4192 len = (len + 511) / 512; 4193 } 4194 4195 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4196 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4197 if (send) 4198 tf->flags |= ATA_TFLAG_WRITE; 4199 tf->command = ata_scsi_trusted_op(len, send, dma); 4200 tf->feature = secp; 4201 tf->lbam = spsp & 0xff; 4202 tf->lbah = spsp >> 8; 4203 4204 if (len) { 4205 tf->nsect = len & 0xff; 4206 tf->lbal = len >> 8; 4207 } else { 4208 if (!send) 4209 tf->lbah = (1 << 7); 4210 } 4211 4212 ata_qc_set_pc_nbytes(qc); 4213 return 0; 4214 } 4215 4216 /** 4217 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4218 * @qc: Command to be translated 4219 * 4220 * Translate a SCSI variable length CDB to specified commands. 4221 * It checks a service action value in CDB to call corresponding handler. 4222 * 4223 * RETURNS: 4224 * Zero on success, non-zero on failure 4225 * 4226 */ 4227 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4228 { 4229 struct scsi_cmnd *scmd = qc->scsicmd; 4230 const u8 *cdb = scmd->cmnd; 4231 const u16 sa = get_unaligned_be16(&cdb[8]); 4232 4233 /* 4234 * if service action represents a ata pass-thru(32) command, 4235 * then pass it to ata_scsi_pass_thru handler. 4236 */ 4237 if (sa == ATA_32) 4238 return ata_scsi_pass_thru(qc); 4239 4240 /* unsupported service action */ 4241 return 1; 4242 } 4243 4244 /** 4245 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4246 * @dev: ATA device 4247 * @cmd: SCSI command opcode to consider 4248 * 4249 * Look up the SCSI command given, and determine whether the 4250 * SCSI command is to be translated or simulated. 4251 * 4252 * RETURNS: 4253 * Pointer to translation function if possible, %NULL if not. 4254 */ 4255 4256 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4257 { 4258 switch (cmd) { 4259 case READ_6: 4260 case READ_10: 4261 case READ_16: 4262 4263 case WRITE_6: 4264 case WRITE_10: 4265 case WRITE_16: 4266 return ata_scsi_rw_xlat; 4267 4268 case WRITE_SAME_16: 4269 return ata_scsi_write_same_xlat; 4270 4271 case SYNCHRONIZE_CACHE: 4272 case SYNCHRONIZE_CACHE_16: 4273 if (ata_try_flush_cache(dev)) 4274 return ata_scsi_flush_xlat; 4275 break; 4276 4277 case VERIFY: 4278 case VERIFY_16: 4279 return ata_scsi_verify_xlat; 4280 4281 case ATA_12: 4282 case ATA_16: 4283 return ata_scsi_pass_thru; 4284 4285 case VARIABLE_LENGTH_CMD: 4286 return ata_scsi_var_len_cdb_xlat; 4287 4288 case MODE_SELECT: 4289 case MODE_SELECT_10: 4290 return ata_scsi_mode_select_xlat; 4291 4292 case ZBC_IN: 4293 return ata_scsi_zbc_in_xlat; 4294 4295 case ZBC_OUT: 4296 return ata_scsi_zbc_out_xlat; 4297 4298 case SECURITY_PROTOCOL_IN: 4299 case SECURITY_PROTOCOL_OUT: 4300 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4301 break; 4302 return ata_scsi_security_inout_xlat; 4303 4304 case START_STOP: 4305 return ata_scsi_start_stop_xlat; 4306 } 4307 4308 return NULL; 4309 } 4310 4311 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4312 { 4313 struct ata_port *ap = dev->link->ap; 4314 u8 scsi_op = scmd->cmnd[0]; 4315 ata_xlat_func_t xlat_func; 4316 4317 /* 4318 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4319 * However, this check is done without holding the ap->lock (a libata 4320 * specific lock), so we can have received an error irq since then, 4321 * therefore we must check if EH is pending or running, while holding 4322 * ap->lock. 4323 */ 4324 if (ata_port_eh_scheduled(ap)) 4325 return SCSI_MLQUEUE_DEVICE_BUSY; 4326 4327 if (unlikely(!scmd->cmd_len)) 4328 goto bad_cdb_len; 4329 4330 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4331 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4332 goto bad_cdb_len; 4333 4334 xlat_func = ata_get_xlat_func(dev, scsi_op); 4335 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4336 /* relay SCSI command to ATAPI device */ 4337 int len = COMMAND_SIZE(scsi_op); 4338 4339 if (unlikely(len > scmd->cmd_len || 4340 len > dev->cdb_len || 4341 scmd->cmd_len > ATAPI_CDB_LEN)) 4342 goto bad_cdb_len; 4343 4344 xlat_func = atapi_xlat; 4345 } else { 4346 /* ATA_16 passthru, treat as an ATA command */ 4347 if (unlikely(scmd->cmd_len > 16)) 4348 goto bad_cdb_len; 4349 4350 xlat_func = ata_get_xlat_func(dev, scsi_op); 4351 } 4352 4353 if (xlat_func) 4354 return ata_scsi_translate(dev, scmd, xlat_func); 4355 4356 ata_scsi_simulate(dev, scmd); 4357 4358 return 0; 4359 4360 bad_cdb_len: 4361 scmd->result = DID_ERROR << 16; 4362 scsi_done(scmd); 4363 return 0; 4364 } 4365 4366 /** 4367 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4368 * @shost: SCSI host of command to be sent 4369 * @cmd: SCSI command to be sent 4370 * 4371 * In some cases, this function translates SCSI commands into 4372 * ATA taskfiles, and queues the taskfiles to be sent to 4373 * hardware. In other cases, this function simulates a 4374 * SCSI device by evaluating and responding to certain 4375 * SCSI commands. This creates the overall effect of 4376 * ATA and ATAPI devices appearing as SCSI devices. 4377 * 4378 * LOCKING: 4379 * ATA host lock 4380 * 4381 * RETURNS: 4382 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4383 * 0 otherwise. 4384 */ 4385 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4386 { 4387 struct ata_port *ap; 4388 struct ata_device *dev; 4389 struct scsi_device *scsidev = cmd->device; 4390 int rc = 0; 4391 unsigned long irq_flags; 4392 4393 ap = ata_shost_to_port(shost); 4394 4395 spin_lock_irqsave(ap->lock, irq_flags); 4396 4397 dev = ata_scsi_find_dev(ap, scsidev); 4398 if (likely(dev)) 4399 rc = __ata_scsi_queuecmd(cmd, dev); 4400 else { 4401 cmd->result = (DID_BAD_TARGET << 16); 4402 scsi_done(cmd); 4403 } 4404 4405 spin_unlock_irqrestore(ap->lock, irq_flags); 4406 4407 return rc; 4408 } 4409 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4410 4411 /** 4412 * ata_scsi_simulate - simulate SCSI command on ATA device 4413 * @dev: the target device 4414 * @cmd: SCSI command being sent to device. 4415 * 4416 * Interprets and directly executes a select list of SCSI commands 4417 * that can be handled internally. 4418 * 4419 * LOCKING: 4420 * spin_lock_irqsave(host lock) 4421 */ 4422 4423 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4424 { 4425 const u8 *scsicmd = cmd->cmnd; 4426 u8 tmp8; 4427 4428 switch(scsicmd[0]) { 4429 case INQUIRY: 4430 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_inquiry); 4431 break; 4432 4433 case MODE_SENSE: 4434 case MODE_SENSE_10: 4435 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_mode_sense); 4436 break; 4437 4438 case READ_CAPACITY: 4439 case SERVICE_ACTION_IN_16: 4440 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_read_cap); 4441 break; 4442 4443 case REPORT_LUNS: 4444 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_report_luns); 4445 break; 4446 4447 case REQUEST_SENSE: 4448 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4449 break; 4450 4451 /* if we reach this, then writeback caching is disabled, 4452 * turning this into a no-op. 4453 */ 4454 case SYNCHRONIZE_CACHE: 4455 case SYNCHRONIZE_CACHE_16: 4456 fallthrough; 4457 4458 /* no-op's, complete with success */ 4459 case REZERO_UNIT: 4460 case SEEK_6: 4461 case SEEK_10: 4462 case TEST_UNIT_READY: 4463 break; 4464 4465 case SEND_DIAGNOSTIC: 4466 tmp8 = scsicmd[1] & ~(1 << 3); 4467 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4468 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4469 break; 4470 4471 case MAINTENANCE_IN: 4472 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_maint_in); 4473 break; 4474 4475 /* all other commands */ 4476 default: 4477 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4478 /* "Invalid command operation code" */ 4479 break; 4480 } 4481 4482 scsi_done(cmd); 4483 } 4484 4485 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4486 { 4487 int i, rc; 4488 4489 for (i = 0; i < host->n_ports; i++) { 4490 struct ata_port *ap = host->ports[i]; 4491 struct Scsi_Host *shost; 4492 4493 rc = -ENOMEM; 4494 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4495 if (!shost) 4496 goto err_alloc; 4497 4498 shost->eh_noresume = 1; 4499 *(struct ata_port **)&shost->hostdata[0] = ap; 4500 ap->scsi_host = shost; 4501 4502 shost->transportt = ata_scsi_transport_template; 4503 shost->unique_id = ap->print_id; 4504 shost->max_id = 16; 4505 shost->max_lun = 1; 4506 shost->max_channel = 1; 4507 shost->max_cmd_len = 32; 4508 4509 /* Schedule policy is determined by ->qc_defer() 4510 * callback and it needs to see every deferred qc. 4511 * Set host_blocked to 1 to prevent SCSI midlayer from 4512 * automatically deferring requests. 4513 */ 4514 shost->max_host_blocked = 1; 4515 4516 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4517 if (rc) 4518 goto err_alloc; 4519 } 4520 4521 return 0; 4522 4523 err_alloc: 4524 while (--i >= 0) { 4525 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4526 4527 /* scsi_host_put() is in ata_devres_release() */ 4528 scsi_remove_host(shost); 4529 } 4530 return rc; 4531 } 4532 4533 #ifdef CONFIG_OF 4534 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4535 { 4536 struct scsi_device *sdev = dev->sdev; 4537 struct device *d = ap->host->dev; 4538 struct device_node *np = d->of_node; 4539 struct device_node *child; 4540 4541 for_each_available_child_of_node(np, child) { 4542 int ret; 4543 u32 val; 4544 4545 ret = of_property_read_u32(child, "reg", &val); 4546 if (ret) 4547 continue; 4548 if (val == dev->devno) { 4549 dev_dbg(d, "found matching device node\n"); 4550 sdev->sdev_gendev.of_node = child; 4551 return; 4552 } 4553 } 4554 } 4555 #else 4556 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4557 { 4558 } 4559 #endif 4560 4561 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4562 { 4563 int tries = 5; 4564 struct ata_device *last_failed_dev = NULL; 4565 struct ata_link *link; 4566 struct ata_device *dev; 4567 4568 repeat: 4569 ata_for_each_link(link, ap, EDGE) { 4570 ata_for_each_dev(dev, link, ENABLED) { 4571 struct scsi_device *sdev; 4572 int channel = 0, id = 0; 4573 4574 if (dev->sdev) 4575 continue; 4576 4577 if (ata_is_host_link(link)) 4578 id = dev->devno; 4579 else 4580 channel = link->pmp; 4581 4582 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4583 NULL); 4584 if (!IS_ERR(sdev)) { 4585 dev->sdev = sdev; 4586 ata_scsi_assign_ofnode(dev, ap); 4587 scsi_device_put(sdev); 4588 } else { 4589 dev->sdev = NULL; 4590 } 4591 } 4592 } 4593 4594 /* If we scanned while EH was in progress or allocation 4595 * failure occurred, scan would have failed silently. Check 4596 * whether all devices are attached. 4597 */ 4598 ata_for_each_link(link, ap, EDGE) { 4599 ata_for_each_dev(dev, link, ENABLED) { 4600 if (!dev->sdev) 4601 goto exit_loop; 4602 } 4603 } 4604 exit_loop: 4605 if (!link) 4606 return; 4607 4608 /* we're missing some SCSI devices */ 4609 if (sync) { 4610 /* If caller requested synchrnous scan && we've made 4611 * any progress, sleep briefly and repeat. 4612 */ 4613 if (dev != last_failed_dev) { 4614 msleep(100); 4615 last_failed_dev = dev; 4616 goto repeat; 4617 } 4618 4619 /* We might be failing to detect boot device, give it 4620 * a few more chances. 4621 */ 4622 if (--tries) { 4623 msleep(100); 4624 goto repeat; 4625 } 4626 4627 ata_port_err(ap, 4628 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4629 } 4630 4631 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4632 round_jiffies_relative(HZ)); 4633 } 4634 4635 /** 4636 * ata_scsi_offline_dev - offline attached SCSI device 4637 * @dev: ATA device to offline attached SCSI device for 4638 * 4639 * This function is called from ata_eh_detach_dev() and is responsible for 4640 * taking the SCSI device attached to @dev offline. This function is 4641 * called with host lock which protects dev->sdev against clearing. 4642 * 4643 * LOCKING: 4644 * spin_lock_irqsave(host lock) 4645 * 4646 * RETURNS: 4647 * true if attached SCSI device exists, false otherwise. 4648 */ 4649 bool ata_scsi_offline_dev(struct ata_device *dev) 4650 { 4651 if (dev->sdev) { 4652 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4653 return true; 4654 } 4655 return false; 4656 } 4657 4658 /** 4659 * ata_scsi_remove_dev - remove attached SCSI device 4660 * @dev: ATA device to remove attached SCSI device for 4661 * 4662 * This function is called from ata_eh_scsi_hotplug() and 4663 * responsible for removing the SCSI device attached to @dev. 4664 * 4665 * LOCKING: 4666 * Kernel thread context (may sleep). 4667 */ 4668 static void ata_scsi_remove_dev(struct ata_device *dev) 4669 { 4670 struct ata_port *ap = dev->link->ap; 4671 struct scsi_device *sdev; 4672 unsigned long flags; 4673 4674 /* Alas, we need to grab scan_mutex to ensure SCSI device 4675 * state doesn't change underneath us and thus 4676 * scsi_device_get() always succeeds. The mutex locking can 4677 * be removed if there is __scsi_device_get() interface which 4678 * increments reference counts regardless of device state. 4679 */ 4680 mutex_lock(&ap->scsi_host->scan_mutex); 4681 spin_lock_irqsave(ap->lock, flags); 4682 4683 /* clearing dev->sdev is protected by host lock */ 4684 sdev = dev->sdev; 4685 dev->sdev = NULL; 4686 4687 if (sdev) { 4688 /* If user initiated unplug races with us, sdev can go 4689 * away underneath us after the host lock and 4690 * scan_mutex are released. Hold onto it. 4691 */ 4692 if (scsi_device_get(sdev) == 0) { 4693 /* The following ensures the attached sdev is 4694 * offline on return from ata_scsi_offline_dev() 4695 * regardless it wins or loses the race 4696 * against this function. 4697 */ 4698 scsi_device_set_state(sdev, SDEV_OFFLINE); 4699 } else { 4700 WARN_ON(1); 4701 sdev = NULL; 4702 } 4703 } 4704 4705 spin_unlock_irqrestore(ap->lock, flags); 4706 mutex_unlock(&ap->scsi_host->scan_mutex); 4707 4708 if (sdev) { 4709 ata_dev_info(dev, "detaching (SCSI %s)\n", 4710 dev_name(&sdev->sdev_gendev)); 4711 4712 scsi_remove_device(sdev); 4713 scsi_device_put(sdev); 4714 } 4715 } 4716 4717 static void ata_scsi_handle_link_detach(struct ata_link *link) 4718 { 4719 struct ata_port *ap = link->ap; 4720 struct ata_device *dev; 4721 4722 ata_for_each_dev(dev, link, ALL) { 4723 unsigned long flags; 4724 4725 spin_lock_irqsave(ap->lock, flags); 4726 if (!(dev->flags & ATA_DFLAG_DETACHED)) { 4727 spin_unlock_irqrestore(ap->lock, flags); 4728 continue; 4729 } 4730 4731 dev->flags &= ~ATA_DFLAG_DETACHED; 4732 spin_unlock_irqrestore(ap->lock, flags); 4733 4734 ata_scsi_remove_dev(dev); 4735 } 4736 } 4737 4738 /** 4739 * ata_scsi_media_change_notify - send media change event 4740 * @dev: Pointer to the disk device with media change event 4741 * 4742 * Tell the block layer to send a media change notification 4743 * event. 4744 * 4745 * LOCKING: 4746 * spin_lock_irqsave(host lock) 4747 */ 4748 void ata_scsi_media_change_notify(struct ata_device *dev) 4749 { 4750 if (dev->sdev) 4751 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4752 GFP_ATOMIC); 4753 } 4754 4755 /** 4756 * ata_scsi_hotplug - SCSI part of hotplug 4757 * @work: Pointer to ATA port to perform SCSI hotplug on 4758 * 4759 * Perform SCSI part of hotplug. It's executed from a separate 4760 * workqueue after EH completes. This is necessary because SCSI 4761 * hot plugging requires working EH and hot unplugging is 4762 * synchronized with hot plugging with a mutex. 4763 * 4764 * LOCKING: 4765 * Kernel thread context (may sleep). 4766 */ 4767 void ata_scsi_hotplug(struct work_struct *work) 4768 { 4769 struct ata_port *ap = 4770 container_of(work, struct ata_port, hotplug_task.work); 4771 int i; 4772 4773 if (ap->pflags & ATA_PFLAG_UNLOADING) 4774 return; 4775 4776 mutex_lock(&ap->scsi_scan_mutex); 4777 4778 /* Unplug detached devices. We cannot use link iterator here 4779 * because PMP links have to be scanned even if PMP is 4780 * currently not attached. Iterate manually. 4781 */ 4782 ata_scsi_handle_link_detach(&ap->link); 4783 if (ap->pmp_link) 4784 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4785 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4786 4787 /* scan for new ones */ 4788 ata_scsi_scan_host(ap, 0); 4789 4790 mutex_unlock(&ap->scsi_scan_mutex); 4791 } 4792 4793 /** 4794 * ata_scsi_user_scan - indication for user-initiated bus scan 4795 * @shost: SCSI host to scan 4796 * @channel: Channel to scan 4797 * @id: ID to scan 4798 * @lun: LUN to scan 4799 * 4800 * This function is called when user explicitly requests bus 4801 * scan. Set probe pending flag and invoke EH. 4802 * 4803 * LOCKING: 4804 * SCSI layer (we don't care) 4805 * 4806 * RETURNS: 4807 * Zero. 4808 */ 4809 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4810 unsigned int id, u64 lun) 4811 { 4812 struct ata_port *ap = ata_shost_to_port(shost); 4813 unsigned long flags; 4814 int devno, rc = 0; 4815 4816 if (lun != SCAN_WILD_CARD && lun) 4817 return -EINVAL; 4818 4819 if (!sata_pmp_attached(ap)) { 4820 if (channel != SCAN_WILD_CARD && channel) 4821 return -EINVAL; 4822 devno = id; 4823 } else { 4824 if (id != SCAN_WILD_CARD && id) 4825 return -EINVAL; 4826 devno = channel; 4827 } 4828 4829 spin_lock_irqsave(ap->lock, flags); 4830 4831 if (devno == SCAN_WILD_CARD) { 4832 struct ata_link *link; 4833 4834 ata_for_each_link(link, ap, EDGE) { 4835 struct ata_eh_info *ehi = &link->eh_info; 4836 ehi->probe_mask |= ATA_ALL_DEVICES; 4837 ehi->action |= ATA_EH_RESET; 4838 } 4839 } else { 4840 struct ata_device *dev = ata_find_dev(ap, devno); 4841 4842 if (dev) { 4843 struct ata_eh_info *ehi = &dev->link->eh_info; 4844 ehi->probe_mask |= 1 << dev->devno; 4845 ehi->action |= ATA_EH_RESET; 4846 } else 4847 rc = -EINVAL; 4848 } 4849 4850 if (rc == 0) { 4851 ata_port_schedule_eh(ap); 4852 spin_unlock_irqrestore(ap->lock, flags); 4853 ata_port_wait_eh(ap); 4854 } else 4855 spin_unlock_irqrestore(ap->lock, flags); 4856 4857 return rc; 4858 } 4859 4860 /** 4861 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4862 * @work: Pointer to ATA port to perform scsi_rescan_device() 4863 * 4864 * After ATA pass thru (SAT) commands are executed successfully, 4865 * libata need to propagate the changes to SCSI layer. 4866 * 4867 * LOCKING: 4868 * Kernel thread context (may sleep). 4869 */ 4870 void ata_scsi_dev_rescan(struct work_struct *work) 4871 { 4872 struct ata_port *ap = 4873 container_of(work, struct ata_port, scsi_rescan_task.work); 4874 struct ata_link *link; 4875 struct ata_device *dev; 4876 unsigned long flags; 4877 bool do_resume; 4878 int ret = 0; 4879 4880 mutex_lock(&ap->scsi_scan_mutex); 4881 spin_lock_irqsave(ap->lock, flags); 4882 4883 ata_for_each_link(link, ap, EDGE) { 4884 ata_for_each_dev(dev, link, ENABLED) { 4885 struct scsi_device *sdev = dev->sdev; 4886 4887 /* 4888 * If the port was suspended before this was scheduled, 4889 * bail out. 4890 */ 4891 if (ap->pflags & ATA_PFLAG_SUSPENDED) 4892 goto unlock_ap; 4893 4894 if (!sdev) 4895 continue; 4896 if (scsi_device_get(sdev)) 4897 continue; 4898 4899 do_resume = dev->flags & ATA_DFLAG_RESUMING; 4900 4901 spin_unlock_irqrestore(ap->lock, flags); 4902 if (do_resume) { 4903 ret = scsi_resume_device(sdev); 4904 if (ret == -EWOULDBLOCK) { 4905 scsi_device_put(sdev); 4906 goto unlock_scan; 4907 } 4908 dev->flags &= ~ATA_DFLAG_RESUMING; 4909 } 4910 ret = scsi_rescan_device(sdev); 4911 scsi_device_put(sdev); 4912 spin_lock_irqsave(ap->lock, flags); 4913 4914 if (ret) 4915 goto unlock_ap; 4916 } 4917 } 4918 4919 unlock_ap: 4920 spin_unlock_irqrestore(ap->lock, flags); 4921 unlock_scan: 4922 mutex_unlock(&ap->scsi_scan_mutex); 4923 4924 /* Reschedule with a delay if scsi_rescan_device() returned an error */ 4925 if (ret) 4926 schedule_delayed_work(&ap->scsi_rescan_task, 4927 msecs_to_jiffies(5)); 4928 } 4929