FILE
libata-scsi.c
File preview with syntax highlighting.
linux-6.19.14/drivers/ata/libata-scsi.c
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 42static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 43static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 44 45typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 46 47static 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 64static 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 74static 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 83static 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 92static 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 125unlock: 126 spin_unlock_irq(ap->lock); 127 128 return rc ? rc : sysfs_emit(buf, "%u\n", msecs); 129} 130 131static 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 } 186unlock: 187 spin_unlock_irqrestore(ap->lock, flags); 188 189 return rc ? rc : len; 190} 191DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 192 ata_scsi_park_show, ata_scsi_park_store); 193EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 194 195bool 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 211void 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 219static 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 */ 247static 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 318static 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 327static 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 336static struct attribute *ata_common_sdev_attrs[] = { 337 &dev_attr_unload_heads.attr, 338 NULL 339}; 340 341static const struct attribute_group ata_common_sdev_attr_group = { 342 .attrs = ata_common_sdev_attrs 343}; 344 345const struct attribute_group *ata_common_sdev_groups[] = { 346 &ata_common_sdev_attr_group, 347 NULL 348}; 349EXPORT_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 */ 369int 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} 379EXPORT_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 */ 391void 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} 409EXPORT_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 */ 423static 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 */ 462int 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; 554error: 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 */ 570int 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 646static 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 */ 659int 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} 713EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 714 715int 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} 721EXPORT_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 */ 742static 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 782fail: 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 789static 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 */ 812static 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 */ 931static 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 */ 981static 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); 1023aborted: 1024 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1025} 1026 1027void 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 */ 1056bool 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} 1062EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1063 1064int 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->manage_restart = ata_acpi_dev_manage_restart(dev); 1106 sdev->force_runtime_start_on_system_start = 1; 1107 } 1108 1109 /* 1110 * ata_pio_sectors() expects buffer for each sector to not cross 1111 * page boundary. Enforce it by requiring buffers to be sector 1112 * aligned, which works iff sector_size is not larger than 1113 * PAGE_SIZE. ATAPI devices also need the alignment as 1114 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1115 */ 1116 if (sdev->sector_size > PAGE_SIZE) 1117 ata_dev_warn(dev, 1118 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1119 sdev->sector_size); 1120 1121 lim->dma_alignment = sdev->sector_size - 1; 1122 1123 if (dev->flags & ATA_DFLAG_AN) 1124 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1125 1126 if (ata_ncq_supported(dev)) 1127 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1128 depth = min(ATA_MAX_QUEUE, depth); 1129 scsi_change_queue_depth(sdev, depth); 1130 1131 if (dev->flags & ATA_DFLAG_TRUSTED) 1132 sdev->security_supported = 1; 1133 1134 dev->sdev = sdev; 1135 return 0; 1136} 1137 1138/** 1139 * ata_scsi_sdev_init - Early setup of SCSI device 1140 * @sdev: SCSI device to examine 1141 * 1142 * This is called from scsi_alloc_sdev() when the scsi device 1143 * associated with an ATA device is scanned on a port. 1144 * 1145 * LOCKING: 1146 * Defined by SCSI layer. We don't really care. 1147 */ 1148 1149int ata_scsi_sdev_init(struct scsi_device *sdev) 1150{ 1151 struct ata_port *ap = ata_shost_to_port(sdev->host); 1152 struct device_link *link; 1153 1154 ata_scsi_sdev_config(sdev); 1155 1156 /* 1157 * Create a link from the ata_port device to the scsi device to ensure 1158 * that PM does suspend/resume in the correct order: the scsi device is 1159 * consumer (child) and the ata port the supplier (parent). 1160 */ 1161 link = device_link_add(&sdev->sdev_gendev, &ap->tdev, 1162 DL_FLAG_STATELESS | 1163 DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); 1164 if (!link) { 1165 ata_port_err(ap, "Failed to create link to scsi device %s\n", 1166 dev_name(&sdev->sdev_gendev)); 1167 return -ENODEV; 1168 } 1169 1170 return 0; 1171} 1172EXPORT_SYMBOL_GPL(ata_scsi_sdev_init); 1173 1174/** 1175 * ata_scsi_sdev_configure - Set SCSI device attributes 1176 * @sdev: SCSI device to examine 1177 * @lim: queue limits 1178 * 1179 * This is called before we actually start reading 1180 * and writing to the device, to configure certain 1181 * SCSI mid-layer behaviors. 1182 * 1183 * LOCKING: 1184 * Defined by SCSI layer. We don't really care. 1185 */ 1186 1187int ata_scsi_sdev_configure(struct scsi_device *sdev, struct queue_limits *lim) 1188{ 1189 struct ata_port *ap = ata_shost_to_port(sdev->host); 1190 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1191 1192 if (dev) 1193 return ata_scsi_dev_config(sdev, lim, dev); 1194 1195 return 0; 1196} 1197EXPORT_SYMBOL_GPL(ata_scsi_sdev_configure); 1198 1199/** 1200 * ata_scsi_sdev_destroy - SCSI device is about to be destroyed 1201 * @sdev: SCSI device to be destroyed 1202 * 1203 * @sdev is about to be destroyed for hot/warm unplugging. If 1204 * this unplugging was initiated by libata as indicated by NULL 1205 * dev->sdev, this function doesn't have to do anything. 1206 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1207 * Clear dev->sdev, schedule the device for ATA detach and invoke 1208 * EH. 1209 * 1210 * LOCKING: 1211 * Defined by SCSI layer. We don't really care. 1212 */ 1213void ata_scsi_sdev_destroy(struct scsi_device *sdev) 1214{ 1215 struct ata_port *ap = ata_shost_to_port(sdev->host); 1216 unsigned long flags; 1217 struct ata_device *dev; 1218 1219 device_link_remove(&sdev->sdev_gendev, &ap->tdev); 1220 1221 spin_lock_irqsave(ap->lock, flags); 1222 dev = __ata_scsi_find_dev(ap, sdev); 1223 if (dev && dev->sdev) { 1224 /* SCSI device already in CANCEL state, no need to offline it */ 1225 dev->sdev = NULL; 1226 dev->flags |= ATA_DFLAG_DETACH; 1227 ata_port_schedule_eh(ap); 1228 } 1229 spin_unlock_irqrestore(ap->lock, flags); 1230 1231 kfree(sdev->dma_drain_buf); 1232} 1233EXPORT_SYMBOL_GPL(ata_scsi_sdev_destroy); 1234 1235/** 1236 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1237 * @qc: Storage for translated ATA taskfile 1238 * 1239 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1240 * (to start). Perhaps these commands should be preceded by 1241 * CHECK POWER MODE to see what power mode the device is already in. 1242 * [See SAT revision 5 at www.t10.org] 1243 * 1244 * LOCKING: 1245 * spin_lock_irqsave(host lock) 1246 * 1247 * RETURNS: 1248 * Zero on success, non-zero on error. 1249 */ 1250static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1251{ 1252 struct scsi_cmnd *scmd = qc->scsicmd; 1253 const u8 *cdb = scmd->cmnd; 1254 u16 fp; 1255 u8 bp = 0xff; 1256 1257 if (scmd->cmd_len < 5) { 1258 fp = 4; 1259 goto invalid_fld; 1260 } 1261 1262 /* LOEJ bit set not supported */ 1263 if (cdb[4] & 0x2) { 1264 fp = 4; 1265 bp = 1; 1266 goto invalid_fld; 1267 } 1268 1269 /* Power conditions not supported */ 1270 if (((cdb[4] >> 4) & 0xf) != 0) { 1271 fp = 4; 1272 bp = 3; 1273 goto invalid_fld; 1274 } 1275 1276 /* Ignore IMMED bit (cdb[1] & 0x1), violates sat-r05 */ 1277 if (!ata_dev_power_init_tf(qc->dev, &qc->tf, cdb[4] & 0x1)) { 1278 ata_scsi_set_sense(qc->dev, scmd, ABORTED_COMMAND, 0, 0); 1279 return 1; 1280 } 1281 1282 /* 1283 * Standby and Idle condition timers could be implemented but that 1284 * would require libata to implement the Power condition mode page 1285 * and allow the user to change it. Changing mode pages requires 1286 * MODE SELECT to be implemented. 1287 */ 1288 1289 return 0; 1290 1291 invalid_fld: 1292 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1293 return 1; 1294} 1295 1296/** 1297 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1298 * @qc: Storage for translated ATA taskfile 1299 * 1300 * Sets up an ATA taskfile to issue FLUSH CACHE or 1301 * FLUSH CACHE EXT. 1302 * 1303 * LOCKING: 1304 * spin_lock_irqsave(host lock) 1305 * 1306 * RETURNS: 1307 * Zero on success, non-zero on error. 1308 */ 1309static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1310{ 1311 struct ata_taskfile *tf = &qc->tf; 1312 1313 tf->flags |= ATA_TFLAG_DEVICE; 1314 tf->protocol = ATA_PROT_NODATA; 1315 1316 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1317 tf->command = ATA_CMD_FLUSH_EXT; 1318 else 1319 tf->command = ATA_CMD_FLUSH; 1320 1321 /* flush is critical for IO integrity, consider it an IO command */ 1322 qc->flags |= ATA_QCFLAG_IO; 1323 1324 return 0; 1325} 1326 1327/** 1328 * scsi_6_lba_len - Get LBA and transfer length 1329 * @cdb: SCSI command to translate 1330 * 1331 * Calculate LBA and transfer length for 6-byte commands. 1332 * 1333 * RETURNS: 1334 * @plba: the LBA 1335 * @plen: the transfer length 1336 */ 1337static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1338{ 1339 *plba = get_unaligned_be24(&cdb[1]) & 0x1fffff; 1340 *plen = cdb[4]; 1341} 1342 1343/** 1344 * scsi_10_lba_len - Get LBA and transfer length 1345 * @cdb: SCSI command to translate 1346 * 1347 * Calculate LBA and transfer length for 10-byte commands. 1348 * 1349 * RETURNS: 1350 * @plba: the LBA 1351 * @plen: the transfer length 1352 */ 1353static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1354{ 1355 *plba = get_unaligned_be32(&cdb[2]); 1356 *plen = get_unaligned_be16(&cdb[7]); 1357} 1358 1359/** 1360 * scsi_16_lba_len - Get LBA and transfer length 1361 * @cdb: SCSI command to translate 1362 * 1363 * Calculate LBA and transfer length for 16-byte commands. 1364 * 1365 * RETURNS: 1366 * @plba: the LBA 1367 * @plen: the transfer length 1368 */ 1369static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1370{ 1371 *plba = get_unaligned_be64(&cdb[2]); 1372 *plen = get_unaligned_be32(&cdb[10]); 1373} 1374 1375/** 1376 * scsi_dld - Get duration limit descriptor index 1377 * @cdb: SCSI command to translate 1378 * 1379 * Returns the dld bits indicating the index of a command duration limit 1380 * descriptor. 1381 */ 1382static inline int scsi_dld(const u8 *cdb) 1383{ 1384 return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03); 1385} 1386 1387/** 1388 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1389 * @qc: Storage for translated ATA taskfile 1390 * 1391 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1392 * 1393 * LOCKING: 1394 * spin_lock_irqsave(host lock) 1395 * 1396 * RETURNS: 1397 * Zero on success, non-zero on error. 1398 */ 1399static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1400{ 1401 struct scsi_cmnd *scmd = qc->scsicmd; 1402 struct ata_taskfile *tf = &qc->tf; 1403 struct ata_device *dev = qc->dev; 1404 u64 dev_sectors = qc->dev->n_sectors; 1405 const u8 *cdb = scmd->cmnd; 1406 u64 block; 1407 u32 n_block; 1408 u16 fp; 1409 1410 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1411 tf->protocol = ATA_PROT_NODATA; 1412 1413 switch (cdb[0]) { 1414 case VERIFY: 1415 if (scmd->cmd_len < 10) { 1416 fp = 9; 1417 goto invalid_fld; 1418 } 1419 scsi_10_lba_len(cdb, &block, &n_block); 1420 break; 1421 case VERIFY_16: 1422 if (scmd->cmd_len < 16) { 1423 fp = 15; 1424 goto invalid_fld; 1425 } 1426 scsi_16_lba_len(cdb, &block, &n_block); 1427 break; 1428 default: 1429 fp = 0; 1430 goto invalid_fld; 1431 } 1432 1433 if (!n_block) 1434 goto nothing_to_do; 1435 if (block >= dev_sectors) 1436 goto out_of_range; 1437 if ((block + n_block) > dev_sectors) 1438 goto out_of_range; 1439 1440 if (dev->flags & ATA_DFLAG_LBA) { 1441 tf->flags |= ATA_TFLAG_LBA; 1442 1443 if (lba_28_ok(block, n_block)) { 1444 /* use LBA28 */ 1445 tf->command = ATA_CMD_VERIFY; 1446 tf->device |= (block >> 24) & 0xf; 1447 } else if (lba_48_ok(block, n_block)) { 1448 if (!(dev->flags & ATA_DFLAG_LBA48)) 1449 goto out_of_range; 1450 1451 /* use LBA48 */ 1452 tf->flags |= ATA_TFLAG_LBA48; 1453 tf->command = ATA_CMD_VERIFY_EXT; 1454 1455 tf->hob_nsect = (n_block >> 8) & 0xff; 1456 1457 tf->hob_lbah = (block >> 40) & 0xff; 1458 tf->hob_lbam = (block >> 32) & 0xff; 1459 tf->hob_lbal = (block >> 24) & 0xff; 1460 } else 1461 /* request too large even for LBA48 */ 1462 goto out_of_range; 1463 1464 tf->nsect = n_block & 0xff; 1465 1466 tf->lbah = (block >> 16) & 0xff; 1467 tf->lbam = (block >> 8) & 0xff; 1468 tf->lbal = block & 0xff; 1469 1470 tf->device |= ATA_LBA; 1471 } else { 1472 /* CHS */ 1473 u32 sect, head, cyl, track; 1474 1475 if (!lba_28_ok(block, n_block)) 1476 goto out_of_range; 1477 1478 /* Convert LBA to CHS */ 1479 track = (u32)block / dev->sectors; 1480 cyl = track / dev->heads; 1481 head = track % dev->heads; 1482 sect = (u32)block % dev->sectors + 1; 1483 1484 /* Check whether the converted CHS can fit. 1485 Cylinder: 0-65535 1486 Head: 0-15 1487 Sector: 1-255*/ 1488 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1489 goto out_of_range; 1490 1491 tf->command = ATA_CMD_VERIFY; 1492 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1493 tf->lbal = sect; 1494 tf->lbam = cyl; 1495 tf->lbah = cyl >> 8; 1496 tf->device |= head; 1497 } 1498 1499 return 0; 1500 1501invalid_fld: 1502 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1503 return 1; 1504 1505out_of_range: 1506 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1507 /* "Logical Block Address out of range" */ 1508 return 1; 1509 1510nothing_to_do: 1511 scmd->result = SAM_STAT_GOOD; 1512 return 1; 1513} 1514 1515static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1516{ 1517 struct request *rq = scsi_cmd_to_rq(scmd); 1518 u32 req_blocks; 1519 1520 if (!blk_rq_is_passthrough(rq)) 1521 return true; 1522 1523 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1524 if (n_blocks > req_blocks) 1525 return false; 1526 1527 return true; 1528} 1529 1530/** 1531 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1532 * @qc: Storage for translated ATA taskfile 1533 * 1534 * Converts any of six SCSI read/write commands into the 1535 * ATA counterpart, including starting sector (LBA), 1536 * sector count, and taking into account the device's LBA48 1537 * support. 1538 * 1539 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1540 * %WRITE_16 are currently supported. 1541 * 1542 * LOCKING: 1543 * spin_lock_irqsave(host lock) 1544 * 1545 * RETURNS: 1546 * Zero on success, non-zero on error. 1547 */ 1548static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1549{ 1550 struct scsi_cmnd *scmd = qc->scsicmd; 1551 const u8 *cdb = scmd->cmnd; 1552 struct request *rq = scsi_cmd_to_rq(scmd); 1553 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1554 unsigned int tf_flags = 0; 1555 int dld = 0; 1556 u64 block; 1557 u32 n_block; 1558 int rc; 1559 u16 fp = 0; 1560 1561 switch (cdb[0]) { 1562 case WRITE_6: 1563 case WRITE_10: 1564 case WRITE_16: 1565 tf_flags |= ATA_TFLAG_WRITE; 1566 break; 1567 } 1568 1569 /* Calculate the SCSI LBA, transfer length and FUA. */ 1570 switch (cdb[0]) { 1571 case READ_10: 1572 case WRITE_10: 1573 if (unlikely(scmd->cmd_len < 10)) { 1574 fp = 9; 1575 goto invalid_fld; 1576 } 1577 scsi_10_lba_len(cdb, &block, &n_block); 1578 if (cdb[1] & (1 << 3)) 1579 tf_flags |= ATA_TFLAG_FUA; 1580 if (!ata_check_nblocks(scmd, n_block)) 1581 goto invalid_fld; 1582 break; 1583 case READ_6: 1584 case WRITE_6: 1585 if (unlikely(scmd->cmd_len < 6)) { 1586 fp = 5; 1587 goto invalid_fld; 1588 } 1589 scsi_6_lba_len(cdb, &block, &n_block); 1590 1591 /* for 6-byte r/w commands, transfer length 0 1592 * means 256 blocks of data, not 0 block. 1593 */ 1594 if (!n_block) 1595 n_block = 256; 1596 if (!ata_check_nblocks(scmd, n_block)) 1597 goto invalid_fld; 1598 break; 1599 case READ_16: 1600 case WRITE_16: 1601 if (unlikely(scmd->cmd_len < 16)) { 1602 fp = 15; 1603 goto invalid_fld; 1604 } 1605 scsi_16_lba_len(cdb, &block, &n_block); 1606 dld = scsi_dld(cdb); 1607 if (cdb[1] & (1 << 3)) 1608 tf_flags |= ATA_TFLAG_FUA; 1609 if (!ata_check_nblocks(scmd, n_block)) 1610 goto invalid_fld; 1611 break; 1612 default: 1613 fp = 0; 1614 goto invalid_fld; 1615 } 1616 1617 /* Check and compose ATA command */ 1618 if (!n_block) 1619 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1620 * length 0 means transfer 0 block of data. 1621 * However, for ATA R/W commands, sector count 0 means 1622 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1623 * 1624 * WARNING: one or two older ATA drives treat 0 as 0... 1625 */ 1626 goto nothing_to_do; 1627 1628 qc->flags |= ATA_QCFLAG_IO; 1629 qc->nbytes = n_block * scmd->device->sector_size; 1630 1631 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class); 1632 if (likely(rc == 0)) 1633 return 0; 1634 1635 if (rc == -ERANGE) 1636 goto out_of_range; 1637 /* treat all other errors as -EINVAL, fall through */ 1638invalid_fld: 1639 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1640 return 1; 1641 1642out_of_range: 1643 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1644 /* "Logical Block Address out of range" */ 1645 return 1; 1646 1647nothing_to_do: 1648 scmd->result = SAM_STAT_GOOD; 1649 return 1; 1650} 1651 1652static void ata_qc_done(struct ata_queued_cmd *qc) 1653{ 1654 struct scsi_cmnd *cmd = qc->scsicmd; 1655 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1656 1657 ata_qc_free(qc); 1658 done(cmd); 1659} 1660 1661void ata_scsi_deferred_qc_work(struct work_struct *work) 1662{ 1663 struct ata_port *ap = 1664 container_of(work, struct ata_port, deferred_qc_work); 1665 struct ata_queued_cmd *qc; 1666 unsigned long flags; 1667 1668 spin_lock_irqsave(ap->lock, flags); 1669 1670 /* 1671 * If we still have a deferred qc and we are not in EH, issue it. In 1672 * such case, we should not need any more deferring the qc, so warn if 1673 * qc_defer() says otherwise. 1674 */ 1675 qc = ap->deferred_qc; 1676 if (qc && !ata_port_eh_scheduled(ap)) { 1677 WARN_ON_ONCE(ap->ops->qc_defer(qc)); 1678 ap->deferred_qc = NULL; 1679 ata_qc_issue(qc); 1680 } 1681 1682 spin_unlock_irqrestore(ap->lock, flags); 1683} 1684 1685void ata_scsi_requeue_deferred_qc(struct ata_port *ap) 1686{ 1687 struct ata_queued_cmd *qc = ap->deferred_qc; 1688 struct scsi_cmnd *scmd; 1689 1690 lockdep_assert_held(ap->lock); 1691 1692 /* 1693 * If we have a deferred qc when a reset occurs or NCQ commands fail, 1694 * do not try to be smart about what to do with this deferred command 1695 * and simply retry it by completing it with DID_SOFT_ERROR. 1696 */ 1697 if (!qc) 1698 return; 1699 1700 scmd = qc->scsicmd; 1701 ap->deferred_qc = NULL; 1702 cancel_work(&ap->deferred_qc_work); 1703 ata_qc_free(qc); 1704 scmd->result = (DID_SOFT_ERROR << 16); 1705 scsi_done(scmd); 1706} 1707 1708static void ata_scsi_schedule_deferred_qc(struct ata_port *ap) 1709{ 1710 struct ata_queued_cmd *qc = ap->deferred_qc; 1711 1712 lockdep_assert_held(ap->lock); 1713 1714 /* 1715 * If we have a deferred qc, then qc_defer() is defined and we can use 1716 * this callback to determine if this qc is good to go, unless EH has 1717 * been scheduled. 1718 */ 1719 if (!qc) 1720 return; 1721 1722 if (ata_port_eh_scheduled(ap)) { 1723 ata_scsi_requeue_deferred_qc(ap); 1724 return; 1725 } 1726 if (!ap->ops->qc_defer(qc)) 1727 queue_work(system_highpri_wq, &ap->deferred_qc_work); 1728} 1729 1730static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1731{ 1732 struct ata_port *ap = qc->ap; 1733 struct scsi_cmnd *cmd = qc->scsicmd; 1734 u8 *cdb = cmd->cmnd; 1735 bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID; 1736 bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12; 1737 bool is_ck_cond_request = cdb[2] & 0x20; 1738 bool is_error = qc->err_mask != 0; 1739 1740 /* For ATA pass thru (SAT) commands, generate a sense block if 1741 * user mandated it or if there's an error. Note that if we 1742 * generate because the user forced us to [CK_COND=1], a check 1743 * condition is generated and the ATA register values are returned 1744 * whether the command completed successfully or not. If there 1745 * was no error, and CK_COND=1, we use the following sense data: 1746 * sk = RECOVERED ERROR 1747 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1748 */ 1749 if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) { 1750 if (!have_sense) 1751 ata_gen_passthru_sense(qc); 1752 ata_scsi_set_passthru_sense_fields(qc); 1753 if (is_ck_cond_request) 1754 set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); 1755 } else if (is_error) { 1756 if (!have_sense) 1757 ata_gen_ata_sense(qc); 1758 ata_scsi_set_sense_information(qc); 1759 } 1760 1761 ata_qc_done(qc); 1762 1763 ata_scsi_schedule_deferred_qc(ap); 1764} 1765 1766static int ata_scsi_qc_issue(struct ata_port *ap, struct ata_queued_cmd *qc) 1767{ 1768 int ret; 1769 1770 if (!ap->ops->qc_defer) 1771 goto issue; 1772 1773 /* 1774 * If we already have a deferred qc, then rely on the SCSI layer to 1775 * requeue and defer all incoming commands until the deferred qc is 1776 * processed, once all on-going commands complete. 1777 */ 1778 if (ap->deferred_qc) { 1779 ata_qc_free(qc); 1780 return SCSI_MLQUEUE_DEVICE_BUSY; 1781 } 1782 1783 /* Check if the command needs to be deferred. */ 1784 ret = ap->ops->qc_defer(qc); 1785 switch (ret) { 1786 case 0: 1787 break; 1788 case ATA_DEFER_LINK: 1789 ret = SCSI_MLQUEUE_DEVICE_BUSY; 1790 break; 1791 case ATA_DEFER_PORT: 1792 ret = SCSI_MLQUEUE_HOST_BUSY; 1793 break; 1794 default: 1795 WARN_ON_ONCE(1); 1796 ret = SCSI_MLQUEUE_HOST_BUSY; 1797 break; 1798 } 1799 1800 if (ret) { 1801 /* 1802 * We must defer this qc: if this is not an NCQ command, keep 1803 * this qc as a deferred one and report to the SCSI layer that 1804 * we issued it so that it is not requeued. The deferred qc will 1805 * be issued with the port deferred_qc_work once all on-going 1806 * commands complete. 1807 */ 1808 if (!ata_is_ncq(qc->tf.protocol)) { 1809 ap->deferred_qc = qc; 1810 return 0; 1811 } 1812 1813 /* Force a requeue of the command to defer its execution. */ 1814 ata_qc_free(qc); 1815 return ret; 1816 } 1817 1818issue: 1819 ata_qc_issue(qc); 1820 1821 return 0; 1822} 1823 1824/** 1825 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1826 * @dev: ATA device to which the command is addressed 1827 * @cmd: SCSI command to execute 1828 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1829 * 1830 * Our ->queuecommand() function has decided that the SCSI 1831 * command issued can be directly translated into an ATA 1832 * command, rather than handled internally. 1833 * 1834 * This function sets up an ata_queued_cmd structure for the 1835 * SCSI command, and sends that ata_queued_cmd to the hardware. 1836 * 1837 * The xlat_func argument (actor) returns 0 if ready to execute 1838 * ATA command, else 1 to finish translation. If 1 is returned 1839 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1840 * to be set reflecting an error condition or clean (early) 1841 * termination. 1842 * 1843 * LOCKING: 1844 * spin_lock_irqsave(host lock) 1845 * 1846 * RETURNS: 1847 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY or SCSI_MLQUEUE_HOST_BUSY if the 1848 * command needs to be deferred. 1849 */ 1850static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1851 ata_xlat_func_t xlat_func) 1852{ 1853 struct ata_port *ap = dev->link->ap; 1854 struct ata_queued_cmd *qc; 1855 1856 lockdep_assert_held(ap->lock); 1857 1858 /* 1859 * ata_scsi_qc_new() calls scsi_done(cmd) in case of failure. So we 1860 * have nothing further to do when allocating a qc fails. 1861 */ 1862 qc = ata_scsi_qc_new(dev, cmd); 1863 if (!qc) 1864 return 0; 1865 1866 /* data is present; dma-map it */ 1867 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1868 cmd->sc_data_direction == DMA_TO_DEVICE) { 1869 if (unlikely(scsi_bufflen(cmd) < 1)) { 1870 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1871 cmd->result = (DID_ERROR << 16); 1872 goto done; 1873 } 1874 1875 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1876 qc->dma_dir = cmd->sc_data_direction; 1877 } 1878 1879 qc->complete_fn = ata_scsi_qc_complete; 1880 1881 if (xlat_func(qc)) 1882 goto done; 1883 1884 return ata_scsi_qc_issue(ap, qc); 1885 1886done: 1887 ata_qc_free(qc); 1888 scsi_done(cmd); 1889 return 0; 1890} 1891 1892/** 1893 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1894 * @dev: Target device. 1895 * @cmd: SCSI command of interest. 1896 * @actor: Callback hook for desired SCSI command simulator 1897 * 1898 * Takes care of the hard work of simulating a SCSI command... 1899 * Mapping the response buffer, calling the command's handler, 1900 * and handling the handler's return value. This return value 1901 * indicates whether the handler wishes the SCSI command to be 1902 * completed successfully (0), or not (in which case cmd->result 1903 * and sense buffer are assumed to be set). 1904 * 1905 * LOCKING: 1906 * spin_lock_irqsave(host lock) 1907 */ 1908static void ata_scsi_rbuf_fill(struct ata_device *dev, struct scsi_cmnd *cmd, 1909 unsigned int (*actor)(struct ata_device *dev, 1910 struct scsi_cmnd *cmd, u8 *rbuf)) 1911{ 1912 unsigned long flags; 1913 unsigned int len; 1914 1915 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1916 1917 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1918 len = actor(dev, cmd, ata_scsi_rbuf); 1919 if (len) { 1920 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1921 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1922 cmd->result = SAM_STAT_GOOD; 1923 if (scsi_bufflen(cmd) > len) 1924 scsi_set_resid(cmd, scsi_bufflen(cmd) - len); 1925 } 1926 1927 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1928} 1929 1930/** 1931 * ata_scsiop_inq_std - Simulate standard INQUIRY command 1932 * @dev: Target device. 1933 * @cmd: SCSI command of interest. 1934 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1935 * 1936 * Returns standard device identification data associated 1937 * with non-VPD INQUIRY command output. 1938 * 1939 * LOCKING: 1940 * spin_lock_irqsave(host lock) 1941 */ 1942static unsigned int ata_scsiop_inq_std(struct ata_device *dev, 1943 struct scsi_cmnd *cmd, u8 *rbuf) 1944{ 1945 static const u8 versions[] = { 1946 0x00, 1947 0x60, /* SAM-3 (no version claimed) */ 1948 1949 0x03, 1950 0x20, /* SBC-2 (no version claimed) */ 1951 1952 0x03, 1953 0x00 /* SPC-3 (no version claimed) */ 1954 }; 1955 static const u8 versions_zbc[] = { 1956 0x00, 1957 0xA0, /* SAM-5 (no version claimed) */ 1958 1959 0x06, 1960 0x00, /* SBC-4 (no version claimed) */ 1961 1962 0x05, 1963 0xC0, /* SPC-5 (no version claimed) */ 1964 1965 0x60, 1966 0x24, /* ZBC r05 */ 1967 }; 1968 1969 u8 hdr[] = { 1970 TYPE_DISK, 1971 0, 1972 0x5, /* claim SPC-3 version compatibility */ 1973 2, 1974 95 - 4, 1975 0, 1976 0, 1977 2 1978 }; 1979 1980 /* 1981 * Set the SCSI Removable Media Bit (RMB) if the ATA removable media 1982 * device bit (obsolete since ATA-8 ACS) is set. 1983 */ 1984 if (ata_id_removable(dev->id)) 1985 hdr[1] |= (1 << 7); 1986 1987 if (dev->class == ATA_DEV_ZAC) { 1988 hdr[0] = TYPE_ZBC; 1989 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1990 } 1991 1992 if (dev->flags & ATA_DFLAG_CDL) 1993 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 1994 1995 memcpy(rbuf, hdr, sizeof(hdr)); 1996 memcpy(&rbuf[8], "ATA ", 8); 1997 ata_id_string(dev->id, &rbuf[16], ATA_ID_PROD, 16); 1998 1999 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2000 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2001 if (strncmp(&rbuf[32], " ", 4) == 0) 2002 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV, 4); 2003 2004 if (rbuf[32] == 0 || rbuf[32] == ' ') 2005 memcpy(&rbuf[32], "n/a ", 4); 2006 2007 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 2008 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2009 else 2010 memcpy(rbuf + 58, versions, sizeof(versions)); 2011 2012 /* 2013 * Include all 8 possible version descriptors, even if not all of 2014 * them are popoulated. 2015 */ 2016 return 96; 2017} 2018 2019/** 2020 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2021 * @dev: Target device. 2022 * @cmd: SCSI command of interest. 2023 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2024 * 2025 * Returns list of inquiry VPD pages available. 2026 * 2027 * LOCKING: 2028 * spin_lock_irqsave(host lock) 2029 */ 2030static unsigned int ata_scsiop_inq_00(struct ata_device *dev, 2031 struct scsi_cmnd *cmd, u8 *rbuf) 2032{ 2033 int i, num_pages = 0; 2034 static const u8 pages[] = { 2035 0x00, /* page 0x00, this page */ 2036 0x80, /* page 0x80, unit serial no page */ 2037 0x83, /* page 0x83, device ident page */ 2038 0x89, /* page 0x89, ata info page */ 2039 0xb0, /* page 0xb0, block limits page */ 2040 0xb1, /* page 0xb1, block device characteristics page */ 2041 0xb2, /* page 0xb2, thin provisioning page */ 2042 0xb6, /* page 0xb6, zoned block device characteristics */ 2043 0xb9, /* page 0xb9, concurrent positioning ranges */ 2044 }; 2045 2046 for (i = 0; i < sizeof(pages); i++) { 2047 if (pages[i] == 0xb6 && !ata_dev_is_zac(dev)) 2048 continue; 2049 rbuf[num_pages + 4] = pages[i]; 2050 num_pages++; 2051 } 2052 rbuf[3] = num_pages; /* number of supported VPD pages */ 2053 2054 return get_unaligned_be16(&rbuf[2]) + 4; 2055} 2056 2057/** 2058 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2059 * @dev: Target device. 2060 * @cmd: SCSI command of interest. 2061 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2062 * 2063 * Returns ATA device serial number. 2064 * 2065 * LOCKING: 2066 * spin_lock_irqsave(host lock) 2067 */ 2068static unsigned int ata_scsiop_inq_80(struct ata_device *dev, 2069 struct scsi_cmnd *cmd, u8 *rbuf) 2070{ 2071 static const u8 hdr[] = { 2072 0, 2073 0x80, /* this page code */ 2074 0, 2075 ATA_ID_SERNO_LEN, /* page len */ 2076 }; 2077 2078 memcpy(rbuf, hdr, sizeof(hdr)); 2079 ata_id_string(dev->id, (unsigned char *) &rbuf[4], 2080 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2081 2082 return get_unaligned_be16(&rbuf[2]) + 4; 2083} 2084 2085/** 2086 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2087 * @dev: Target device. 2088 * @cmd: SCSI command of interest. 2089 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2090 * 2091 * Yields two logical unit device identification designators: 2092 * - vendor specific ASCII containing the ATA serial number 2093 * - SAT defined "t10 vendor id based" containing ASCII vendor 2094 * name ("ATA "), model and serial numbers. 2095 * 2096 * LOCKING: 2097 * spin_lock_irqsave(host lock) 2098 */ 2099static unsigned int ata_scsiop_inq_83(struct ata_device *dev, 2100 struct scsi_cmnd *cmd, u8 *rbuf) 2101{ 2102 const int sat_model_serial_desc_len = 68; 2103 int num; 2104 2105 rbuf[1] = 0x83; /* this page code */ 2106 num = 4; 2107 2108 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2109 rbuf[num + 0] = 2; 2110 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2111 num += 4; 2112 ata_id_string(dev->id, (unsigned char *) rbuf + num, 2113 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2114 num += ATA_ID_SERNO_LEN; 2115 2116 /* SAT defined lu model and serial numbers descriptor */ 2117 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2118 rbuf[num + 0] = 2; 2119 rbuf[num + 1] = 1; 2120 rbuf[num + 3] = sat_model_serial_desc_len; 2121 num += 4; 2122 memcpy(rbuf + num, "ATA ", 8); 2123 num += 8; 2124 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2125 ATA_ID_PROD_LEN); 2126 num += ATA_ID_PROD_LEN; 2127 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2128 ATA_ID_SERNO_LEN); 2129 num += ATA_ID_SERNO_LEN; 2130 2131 if (ata_id_has_wwn(dev->id)) { 2132 /* SAT defined lu world wide name */ 2133 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2134 rbuf[num + 0] = 1; 2135 rbuf[num + 1] = 3; 2136 rbuf[num + 3] = ATA_ID_WWN_LEN; 2137 num += 4; 2138 ata_id_string(dev->id, (unsigned char *) rbuf + num, 2139 ATA_ID_WWN, ATA_ID_WWN_LEN); 2140 num += ATA_ID_WWN_LEN; 2141 } 2142 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2143 2144 return get_unaligned_be16(&rbuf[2]) + 4; 2145} 2146 2147/** 2148 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2149 * @dev: Target device. 2150 * @cmd: SCSI command of interest. 2151 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2152 * 2153 * Yields SAT-specified ATA VPD page. 2154 * 2155 * LOCKING: 2156 * spin_lock_irqsave(host lock) 2157 */ 2158static unsigned int ata_scsiop_inq_89(struct ata_device *dev, 2159 struct scsi_cmnd *cmd, u8 *rbuf) 2160{ 2161 rbuf[1] = 0x89; /* our page code */ 2162 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2163 rbuf[3] = (0x238 & 0xff); 2164 2165 memcpy(&rbuf[8], "linux ", 8); 2166 memcpy(&rbuf[16], "libata ", 16); 2167 memcpy(&rbuf[32], DRV_VERSION, 4); 2168 2169 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2170 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2171 /* TODO: PMP? */ 2172 2173 /* we don't store the ATA device signature, so we fake it */ 2174 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2175 rbuf[40] = 0x1; 2176 rbuf[48] = 0x1; 2177 2178 rbuf[56] = ATA_CMD_ID_ATA; 2179 2180 memcpy(&rbuf[60], &dev->id[0], 512); 2181 2182 return get_unaligned_be16(&rbuf[2]) + 4; 2183} 2184 2185/** 2186 * ata_scsiop_inq_b0 - Simulate INQUIRY VPD page B0, Block Limits 2187 * @dev: Target device. 2188 * @cmd: SCSI command of interest. 2189 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2190 * 2191 * Return data for the VPD page B0h (Block Limits). 2192 * 2193 * LOCKING: 2194 * spin_lock_irqsave(host lock) 2195 */ 2196static unsigned int ata_scsiop_inq_b0(struct ata_device *dev, 2197 struct scsi_cmnd *cmd, u8 *rbuf) 2198{ 2199 u16 min_io_sectors; 2200 2201 rbuf[1] = 0xb0; 2202 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2203 2204 /* 2205 * Optimal transfer length granularity. 2206 * 2207 * This is always one physical block, but for disks with a smaller 2208 * logical than physical sector size we need to figure out what the 2209 * latter is. 2210 */ 2211 min_io_sectors = 1 << ata_id_log2_per_physical_sector(dev->id); 2212 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2213 2214 /* 2215 * Optimal unmap granularity. 2216 * 2217 * The ATA spec doesn't even know about a granularity or alignment 2218 * for the TRIM command. We can leave away most of the unmap related 2219 * VPD page entries, but we have specifify a granularity to signal 2220 * that we support some form of unmap - in thise case via WRITE SAME 2221 * with the unmap bit set. 2222 */ 2223 if (ata_id_has_trim(dev->id)) { 2224 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2225 2226 if (dev->quirks & ATA_QUIRK_MAX_TRIM_128M) 2227 max_blocks = 128 << (20 - SECTOR_SHIFT); 2228 2229 put_unaligned_be64(max_blocks, &rbuf[36]); 2230 put_unaligned_be32(1, &rbuf[28]); 2231 } 2232 2233 return get_unaligned_be16(&rbuf[2]) + 4; 2234} 2235 2236/** 2237 * ata_scsiop_inq_b1 - Simulate INQUIRY VPD page B1, Block Device 2238 * Characteristics 2239 * @dev: Target device. 2240 * @cmd: SCSI command of interest. 2241 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2242 * 2243 * Return data for the VPD page B1h (Block Device Characteristics). 2244 * 2245 * LOCKING: 2246 * spin_lock_irqsave(host lock) 2247 */ 2248static unsigned int ata_scsiop_inq_b1(struct ata_device *dev, 2249 struct scsi_cmnd *cmd, u8 *rbuf) 2250{ 2251 int form_factor = ata_id_form_factor(dev->id); 2252 int media_rotation_rate = ata_id_rotation_rate(dev->id); 2253 u8 zoned = ata_id_zoned_cap(dev->id); 2254 2255 rbuf[1] = 0xb1; 2256 rbuf[3] = 0x3c; 2257 rbuf[4] = media_rotation_rate >> 8; 2258 rbuf[5] = media_rotation_rate; 2259 rbuf[7] = form_factor; 2260 if (zoned) 2261 rbuf[8] = (zoned << 4); 2262 2263 return get_unaligned_be16(&rbuf[2]) + 4; 2264} 2265 2266/** 2267 * ata_scsiop_inq_b2 - Simulate INQUIRY VPD page B2, Logical Block 2268 * Provisioning 2269 * @dev: Target device. 2270 * @cmd: SCSI command of interest. 2271 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2272 * 2273 * Return data for the VPD page B2h (Logical Block Provisioning). 2274 * 2275 * LOCKING: 2276 * spin_lock_irqsave(host lock) 2277 */ 2278static unsigned int ata_scsiop_inq_b2(struct ata_device *dev, 2279 struct scsi_cmnd *cmd, u8 *rbuf) 2280{ 2281 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2282 rbuf[1] = 0xb2; 2283 rbuf[3] = 0x4; 2284 rbuf[5] = 1 << 6; /* TPWS */ 2285 2286 return get_unaligned_be16(&rbuf[2]) + 4; 2287} 2288 2289/** 2290 * ata_scsiop_inq_b6 - Simulate INQUIRY VPD page B6, Zoned Block Device 2291 * Characteristics 2292 * @dev: Target device. 2293 * @cmd: SCSI command of interest. 2294 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2295 * 2296 * Return data for the VPD page B2h (Zoned Block Device Characteristics). 2297 * 2298 * LOCKING: 2299 * spin_lock_irqsave(host lock) 2300 */ 2301static unsigned int ata_scsiop_inq_b6(struct ata_device *dev, 2302 struct scsi_cmnd *cmd, u8 *rbuf) 2303{ 2304 if (!ata_dev_is_zac(dev)) { 2305 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2306 return 0; 2307 } 2308 2309 /* 2310 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2311 */ 2312 rbuf[1] = 0xb6; 2313 rbuf[3] = 0x3C; 2314 2315 /* 2316 * URSWRZ bit is only meaningful for host-managed ZAC drives 2317 */ 2318 if (dev->zac_zoned_cap & 1) 2319 rbuf[4] |= 1; 2320 put_unaligned_be32(dev->zac_zones_optimal_open, &rbuf[8]); 2321 put_unaligned_be32(dev->zac_zones_optimal_nonseq, &rbuf[12]); 2322 put_unaligned_be32(dev->zac_zones_max_open, &rbuf[16]); 2323 2324 return get_unaligned_be16(&rbuf[2]) + 4; 2325} 2326 2327/** 2328 * ata_scsiop_inq_b9 - Simulate INQUIRY VPD page B9, Concurrent Positioning 2329 * Ranges 2330 * @dev: Target device. 2331 * @cmd: SCSI command of interest. 2332 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2333 * 2334 * Return data for the VPD page B9h (Concurrent Positioning Ranges). 2335 * 2336 * LOCKING: 2337 * spin_lock_irqsave(host lock) 2338 */ 2339static unsigned int ata_scsiop_inq_b9(struct ata_device *dev, 2340 struct scsi_cmnd *cmd, u8 *rbuf) 2341{ 2342 struct ata_cpr_log *cpr_log = dev->cpr_log; 2343 u8 *desc = &rbuf[64]; 2344 int i; 2345 2346 if (!cpr_log) { 2347 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2348 return 0; 2349 } 2350 2351 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2352 rbuf[1] = 0xb9; 2353 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2354 2355 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2356 desc[0] = cpr_log->cpr[i].num; 2357 desc[1] = cpr_log->cpr[i].num_storage_elements; 2358 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2359 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2360 } 2361 2362 return get_unaligned_be16(&rbuf[2]) + 4; 2363} 2364 2365/** 2366 * ata_scsiop_inquiry - Simulate INQUIRY command 2367 * @dev: Target device. 2368 * @cmd: SCSI command of interest. 2369 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2370 * 2371 * Returns data associated with an INQUIRY command output. 2372 * 2373 * LOCKING: 2374 * spin_lock_irqsave(host lock) 2375 */ 2376static unsigned int ata_scsiop_inquiry(struct ata_device *dev, 2377 struct scsi_cmnd *cmd, u8 *rbuf) 2378{ 2379 const u8 *scsicmd = cmd->cmnd; 2380 2381 /* is CmdDt set? */ 2382 if (scsicmd[1] & 2) { 2383 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2384 return 0; 2385 } 2386 2387 /* Is EVPD clear? */ 2388 if ((scsicmd[1] & 1) == 0) 2389 return ata_scsiop_inq_std(dev, cmd, rbuf); 2390 2391 switch (scsicmd[2]) { 2392 case 0x00: 2393 return ata_scsiop_inq_00(dev, cmd, rbuf); 2394 case 0x80: 2395 return ata_scsiop_inq_80(dev, cmd, rbuf); 2396 case 0x83: 2397 return ata_scsiop_inq_83(dev, cmd, rbuf); 2398 case 0x89: 2399 return ata_scsiop_inq_89(dev, cmd, rbuf); 2400 case 0xb0: 2401 return ata_scsiop_inq_b0(dev, cmd, rbuf); 2402 case 0xb1: 2403 return ata_scsiop_inq_b1(dev, cmd, rbuf); 2404 case 0xb2: 2405 return ata_scsiop_inq_b2(dev, cmd, rbuf); 2406 case 0xb6: 2407 return ata_scsiop_inq_b6(dev, cmd, rbuf); 2408 case 0xb9: 2409 return ata_scsiop_inq_b9(dev, cmd, rbuf); 2410 default: 2411 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2412 return 0; 2413 } 2414} 2415 2416/** 2417 * modecpy - Prepare response for MODE SENSE 2418 * @dest: output buffer 2419 * @src: data being copied 2420 * @n: length of mode page 2421 * @changeable: whether changeable parameters are requested 2422 * 2423 * Generate a generic MODE SENSE page for either current or changeable 2424 * parameters. 2425 * 2426 * LOCKING: 2427 * None. 2428 */ 2429static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2430{ 2431 if (changeable) { 2432 memcpy(dest, src, 2); 2433 memset(dest + 2, 0, n - 2); 2434 } else { 2435 memcpy(dest, src, n); 2436 } 2437} 2438 2439/** 2440 * ata_msense_caching - Simulate MODE SENSE caching info page 2441 * @id: device IDENTIFY data 2442 * @buf: output buffer 2443 * @changeable: whether changeable parameters are requested 2444 * 2445 * Generate a caching info page, which conditionally indicates 2446 * write caching to the SCSI layer, depending on device 2447 * capabilities. 2448 * 2449 * LOCKING: 2450 * None. 2451 */ 2452static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2453{ 2454 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2455 if (changeable) { 2456 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2457 } else { 2458 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2459 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2460 } 2461 return sizeof(def_cache_mpage); 2462} 2463 2464/* 2465 * Simulate MODE SENSE control mode page, sub-page 0. 2466 */ 2467static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2468 bool changeable) 2469{ 2470 modecpy(buf, def_control_mpage, 2471 sizeof(def_control_mpage), changeable); 2472 if (changeable) { 2473 /* ata_mselect_control() */ 2474 buf[2] |= (1 << 2); 2475 } else { 2476 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2477 2478 /* descriptor format sense data */ 2479 buf[2] |= (d_sense << 2); 2480 } 2481 2482 return sizeof(def_control_mpage); 2483} 2484 2485/* 2486 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2487 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2488 * only, take care of overflows. 2489 */ 2490static inline u16 ata_xlat_cdl_limit(u8 *buf) 2491{ 2492 u32 limit = get_unaligned_le32(buf); 2493 2494 return min_t(u32, limit / 10000, 65535); 2495} 2496 2497/* 2498 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2499 * (command duration limits T2A and T2B mode pages). 2500 */ 2501static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2502 u8 spg) 2503{ 2504 u8 *b, *cdl, *desc; 2505 u32 policy; 2506 int i; 2507 2508 if (!(dev->flags & ATA_DFLAG_CDL) || !dev->cdl) 2509 return 0; 2510 2511 cdl = dev->cdl->desc_log_buf; 2512 2513 /* 2514 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2515 * are a header. The PAGE LENGTH field is the size of the page 2516 * excluding the header. 2517 */ 2518 buf[0] = CONTROL_MPAGE; 2519 buf[1] = spg; 2520 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2521 if (spg == CDL_T2A_SUB_MPAGE) { 2522 /* 2523 * Read descriptors map to the T2A page: 2524 * set perf_vs_duration_guidleine. 2525 */ 2526 buf[7] = (cdl[0] & 0x03) << 4; 2527 desc = cdl + 64; 2528 } else { 2529 /* Write descriptors map to the T2B page */ 2530 desc = cdl + 288; 2531 } 2532 2533 /* Fill the T2 page descriptors */ 2534 b = &buf[8]; 2535 policy = get_unaligned_le32(&cdl[0]); 2536 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2537 /* t2cdlunits: fixed to 10ms */ 2538 b[0] = 0x0a; 2539 2540 /* Max inactive time and its policy */ 2541 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2542 b[6] = ((policy >> 8) & 0x0f) << 4; 2543 2544 /* Max active time and its policy */ 2545 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2546 b[6] |= (policy >> 4) & 0x0f; 2547 2548 /* Command duration guideline and its policy */ 2549 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2550 b[14] = policy & 0x0f; 2551 } 2552 2553 return CDL_T2_SUB_MPAGE_LEN; 2554} 2555 2556/* 2557 * Simulate MODE SENSE control mode page, sub-page f2h 2558 * (ATA feature control mode page). 2559 */ 2560static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2561 u8 *buf) 2562{ 2563 /* PS=0, SPF=1 */ 2564 buf[0] = CONTROL_MPAGE | (1 << 6); 2565 buf[1] = ATA_FEATURE_SUB_MPAGE; 2566 2567 /* 2568 * The first four bytes of ATA Feature Control mode page are a header. 2569 * The PAGE LENGTH field is the size of the page excluding the header. 2570 */ 2571 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2572 2573 if (dev->flags & ATA_DFLAG_CDL_ENABLED) 2574 buf[4] = 0x02; /* T2A and T2B pages enabled */ 2575 else 2576 buf[4] = 0; 2577 2578 return ATA_FEATURE_SUB_MPAGE_LEN; 2579} 2580 2581/** 2582 * ata_msense_control - Simulate MODE SENSE control mode page 2583 * @dev: ATA device of interest 2584 * @buf: output buffer 2585 * @spg: sub-page code 2586 * @changeable: whether changeable parameters are requested 2587 * 2588 * Generate a generic MODE SENSE control mode page. 2589 * 2590 * LOCKING: 2591 * None. 2592 */ 2593static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2594 u8 spg, bool changeable) 2595{ 2596 unsigned int n; 2597 2598 switch (spg) { 2599 case 0: 2600 return ata_msense_control_spg0(dev, buf, changeable); 2601 case CDL_T2A_SUB_MPAGE: 2602 case CDL_T2B_SUB_MPAGE: 2603 return ata_msense_control_spgt2(dev, buf, spg); 2604 case ATA_FEATURE_SUB_MPAGE: 2605 return ata_msense_control_ata_feature(dev, buf); 2606 case ALL_SUB_MPAGES: 2607 n = ata_msense_control_spg0(dev, buf, changeable); 2608 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2609 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2B_SUB_MPAGE); 2610 n += ata_msense_control_ata_feature(dev, buf + n); 2611 return n; 2612 default: 2613 return 0; 2614 } 2615} 2616 2617/** 2618 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2619 * @buf: output buffer 2620 * @changeable: whether changeable parameters are requested 2621 * 2622 * Generate a generic MODE SENSE r/w error recovery page. 2623 * 2624 * LOCKING: 2625 * None. 2626 */ 2627static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2628{ 2629 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2630 changeable); 2631 return sizeof(def_rw_recovery_mpage); 2632} 2633 2634/** 2635 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2636 * @dev: Target device. 2637 * @cmd: SCSI command of interest. 2638 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2639 * 2640 * Simulate MODE SENSE commands. Assume this is invoked for direct 2641 * access devices (e.g. disks) only. There should be no block 2642 * descriptor for other device types. 2643 * 2644 * LOCKING: 2645 * spin_lock_irqsave(host lock) 2646 */ 2647static unsigned int ata_scsiop_mode_sense(struct ata_device *dev, 2648 struct scsi_cmnd *cmd, u8 *rbuf) 2649{ 2650 u8 *scsicmd = cmd->cmnd, *p = rbuf; 2651 static const u8 sat_blk_desc[] = { 2652 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2653 0, 2654 0, 0x2, 0x0 /* block length: 512 bytes */ 2655 }; 2656 u8 pg, spg; 2657 unsigned int ebd, page_control, six_byte; 2658 u8 dpofua = 0, bp = 0xff; 2659 u16 fp; 2660 2661 six_byte = (scsicmd[0] == MODE_SENSE); 2662 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2663 /* 2664 * LLBA bit in msense(10) ignored (compliant) 2665 */ 2666 2667 page_control = scsicmd[2] >> 6; 2668 switch (page_control) { 2669 case 0: /* current */ 2670 case 1: /* changeable */ 2671 case 2: /* defaults */ 2672 break; /* supported */ 2673 case 3: /* saved */ 2674 goto saving_not_supp; 2675 default: 2676 fp = 2; 2677 bp = 6; 2678 goto invalid_fld; 2679 } 2680 2681 if (six_byte) 2682 p += 4 + (ebd ? 8 : 0); 2683 else 2684 p += 8 + (ebd ? 8 : 0); 2685 2686 pg = scsicmd[2] & 0x3f; 2687 spg = scsicmd[3]; 2688 2689 /* 2690 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2691 * the control page. 2692 */ 2693 if (spg) { 2694 switch (spg) { 2695 case ALL_SUB_MPAGES: 2696 break; 2697 case CDL_T2A_SUB_MPAGE: 2698 case CDL_T2B_SUB_MPAGE: 2699 case ATA_FEATURE_SUB_MPAGE: 2700 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2701 break; 2702 fallthrough; 2703 default: 2704 fp = 3; 2705 goto invalid_fld; 2706 } 2707 } 2708 2709 switch(pg) { 2710 case RW_RECOVERY_MPAGE: 2711 p += ata_msense_rw_recovery(p, page_control == 1); 2712 break; 2713 2714 case CACHE_MPAGE: 2715 p += ata_msense_caching(dev->id, p, page_control == 1); 2716 break; 2717 2718 case CONTROL_MPAGE: 2719 p += ata_msense_control(dev, p, spg, page_control == 1); 2720 break; 2721 2722 case ALL_MPAGES: 2723 p += ata_msense_rw_recovery(p, page_control == 1); 2724 p += ata_msense_caching(dev->id, p, page_control == 1); 2725 p += ata_msense_control(dev, p, spg, page_control == 1); 2726 break; 2727 2728 default: /* invalid page code */ 2729 fp = 2; 2730 goto invalid_fld; 2731 } 2732 2733 if (dev->flags & ATA_DFLAG_FUA) 2734 dpofua = 1 << 4; 2735 2736 if (six_byte) { 2737 rbuf[0] = p - rbuf - 1; 2738 rbuf[2] |= dpofua; 2739 if (ebd) { 2740 rbuf[3] = sizeof(sat_blk_desc); 2741 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2742 } 2743 2744 return rbuf[0] + 1; 2745 } 2746 2747 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2748 rbuf[3] |= dpofua; 2749 if (ebd) { 2750 rbuf[7] = sizeof(sat_blk_desc); 2751 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2752 } 2753 2754 return get_unaligned_be16(&rbuf[0]) + 2; 2755 2756invalid_fld: 2757 ata_scsi_set_invalid_field(dev, cmd, fp, bp); 2758 return 0; 2759 2760saving_not_supp: 2761 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2762 /* "Saving parameters not supported" */ 2763 return 0; 2764} 2765 2766/** 2767 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2768 * @dev: Target device. 2769 * @cmd: SCSI command of interest. 2770 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2771 * 2772 * Simulate READ CAPACITY commands. 2773 * 2774 * LOCKING: 2775 * None. 2776 */ 2777static unsigned int ata_scsiop_read_cap(struct ata_device *dev, 2778 struct scsi_cmnd *cmd, u8 *rbuf) 2779{ 2780 u8 *scsicmd = cmd->cmnd; 2781 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2782 u32 sector_size; /* physical sector size in bytes */ 2783 u8 log2_per_phys; 2784 u16 lowest_aligned; 2785 2786 sector_size = ata_id_logical_sector_size(dev->id); 2787 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2788 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2789 2790 if (scsicmd[0] == READ_CAPACITY) { 2791 if (last_lba >= 0xffffffffULL) 2792 last_lba = 0xffffffff; 2793 2794 /* sector count, 32-bit */ 2795 rbuf[0] = last_lba >> (8 * 3); 2796 rbuf[1] = last_lba >> (8 * 2); 2797 rbuf[2] = last_lba >> (8 * 1); 2798 rbuf[3] = last_lba; 2799 2800 /* sector size */ 2801 rbuf[4] = sector_size >> (8 * 3); 2802 rbuf[5] = sector_size >> (8 * 2); 2803 rbuf[6] = sector_size >> (8 * 1); 2804 rbuf[7] = sector_size; 2805 2806 return 8; 2807 } 2808 2809 /* 2810 * READ CAPACITY 16 command is defined as a service action 2811 * (SERVICE_ACTION_IN_16 command). 2812 */ 2813 if (scsicmd[0] != SERVICE_ACTION_IN_16 || 2814 (scsicmd[1] & 0x1f) != SAI_READ_CAPACITY_16) { 2815 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2816 return 0; 2817 } 2818 2819 /* sector count, 64-bit */ 2820 rbuf[0] = last_lba >> (8 * 7); 2821 rbuf[1] = last_lba >> (8 * 6); 2822 rbuf[2] = last_lba >> (8 * 5); 2823 rbuf[3] = last_lba >> (8 * 4); 2824 rbuf[4] = last_lba >> (8 * 3); 2825 rbuf[5] = last_lba >> (8 * 2); 2826 rbuf[6] = last_lba >> (8 * 1); 2827 rbuf[7] = last_lba; 2828 2829 /* sector size */ 2830 rbuf[ 8] = sector_size >> (8 * 3); 2831 rbuf[ 9] = sector_size >> (8 * 2); 2832 rbuf[10] = sector_size >> (8 * 1); 2833 rbuf[11] = sector_size; 2834 2835 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 2836 rbuf[12] = (1 << 4); /* RC_BASIS */ 2837 rbuf[13] = log2_per_phys; 2838 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2839 rbuf[15] = lowest_aligned; 2840 2841 if (ata_id_has_trim(dev->id) && !(dev->quirks & ATA_QUIRK_NOTRIM)) { 2842 rbuf[14] |= 0x80; /* LBPME */ 2843 2844 if (ata_id_has_zero_after_trim(dev->id) && 2845 dev->quirks & ATA_QUIRK_ZERO_AFTER_TRIM) { 2846 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2847 rbuf[14] |= 0x40; /* LBPRZ */ 2848 } 2849 } 2850 2851 return 16; 2852} 2853 2854/** 2855 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2856 * @dev: Target device. 2857 * @cmd: SCSI command of interest. 2858 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2859 * 2860 * Simulate REPORT LUNS command. 2861 * 2862 * LOCKING: 2863 * spin_lock_irqsave(host lock) 2864 */ 2865static unsigned int ata_scsiop_report_luns(struct ata_device *dev, 2866 struct scsi_cmnd *cmd, u8 *rbuf) 2867{ 2868 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2869 2870 return 16; 2871} 2872 2873/* 2874 * ATAPI devices typically report zero for their SCSI version, and sometimes 2875 * deviate from the spec WRT response data format. If SCSI version is 2876 * reported as zero like normal, then we make the following fixups: 2877 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2878 * modern device. 2879 * 2) Ensure response data format / ATAPI information are always correct. 2880 */ 2881static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2882{ 2883 u8 buf[4]; 2884 2885 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2886 if (buf[2] == 0) { 2887 buf[2] = 0x5; 2888 buf[3] = 0x32; 2889 } 2890 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2891} 2892 2893static void atapi_qc_complete(struct ata_queued_cmd *qc) 2894{ 2895 struct scsi_cmnd *cmd = qc->scsicmd; 2896 unsigned int err_mask = qc->err_mask; 2897 2898 /* handle completion from EH */ 2899 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2900 2901 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2902 ata_gen_passthru_sense(qc); 2903 2904 /* SCSI EH automatically locks door if sdev->locked is 2905 * set. Sometimes door lock request continues to 2906 * fail, for example, when no media is present. This 2907 * creates a loop - SCSI EH issues door lock which 2908 * fails and gets invoked again to acquire sense data 2909 * for the failed command. 2910 * 2911 * If door lock fails, always clear sdev->locked to 2912 * avoid this infinite loop. 2913 * 2914 * This may happen before SCSI scan is complete. Make 2915 * sure qc->dev->sdev isn't NULL before dereferencing. 2916 */ 2917 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2918 qc->dev->sdev->locked = 0; 2919 2920 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2921 ata_qc_done(qc); 2922 return; 2923 } 2924 2925 /* successful completion path */ 2926 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2927 atapi_fixup_inquiry(cmd); 2928 cmd->result = SAM_STAT_GOOD; 2929 2930 ata_qc_done(qc); 2931} 2932/** 2933 * atapi_xlat - Initialize PACKET taskfile 2934 * @qc: command structure to be initialized 2935 * 2936 * LOCKING: 2937 * spin_lock_irqsave(host lock) 2938 * 2939 * RETURNS: 2940 * Zero on success, non-zero on failure. 2941 */ 2942static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2943{ 2944 struct scsi_cmnd *scmd = qc->scsicmd; 2945 struct ata_device *dev = qc->dev; 2946 int nodata = (scmd->sc_data_direction == DMA_NONE); 2947 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2948 unsigned int nbytes; 2949 2950 memset(qc->cdb, 0, dev->cdb_len); 2951 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2952 2953 qc->complete_fn = atapi_qc_complete; 2954 2955 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2956 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2957 qc->tf.flags |= ATA_TFLAG_WRITE; 2958 } 2959 2960 qc->tf.command = ATA_CMD_PACKET; 2961 ata_qc_set_pc_nbytes(qc); 2962 2963 /* check whether ATAPI DMA is safe */ 2964 if (!nodata && !using_pio && atapi_check_dma(qc)) 2965 using_pio = 1; 2966 2967 /* Some controller variants snoop this value for Packet 2968 * transfers to do state machine and FIFO management. Thus we 2969 * want to set it properly, and for DMA where it is 2970 * effectively meaningless. 2971 */ 2972 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2973 2974 /* Most ATAPI devices which honor transfer chunk size don't 2975 * behave according to the spec when odd chunk size which 2976 * matches the transfer length is specified. If the number of 2977 * bytes to transfer is 2n+1. According to the spec, what 2978 * should happen is to indicate that 2n+1 is going to be 2979 * transferred and transfer 2n+2 bytes where the last byte is 2980 * padding. 2981 * 2982 * In practice, this doesn't happen. ATAPI devices first 2983 * indicate and transfer 2n bytes and then indicate and 2984 * transfer 2 bytes where the last byte is padding. 2985 * 2986 * This inconsistency confuses several controllers which 2987 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2988 * These controllers use actual number of transferred bytes to 2989 * update DMA pointer and transfer of 4n+2 bytes make those 2990 * controller push DMA pointer by 4n+4 bytes because SATA data 2991 * FISes are aligned to 4 bytes. This causes data corruption 2992 * and buffer overrun. 2993 * 2994 * Always setting nbytes to even number solves this problem 2995 * because then ATAPI devices don't have to split data at 2n 2996 * boundaries. 2997 */ 2998 if (nbytes & 0x1) 2999 nbytes++; 3000 3001 qc->tf.lbam = (nbytes & 0xFF); 3002 qc->tf.lbah = (nbytes >> 8); 3003 3004 if (nodata) 3005 qc->tf.protocol = ATAPI_PROT_NODATA; 3006 else if (using_pio) 3007 qc->tf.protocol = ATAPI_PROT_PIO; 3008 else { 3009 /* DMA data xfer */ 3010 qc->tf.protocol = ATAPI_PROT_DMA; 3011 qc->tf.feature |= ATAPI_PKT_DMA; 3012 3013 if ((dev->flags & ATA_DFLAG_DMADIR) && 3014 (scmd->sc_data_direction != DMA_TO_DEVICE)) 3015 /* some SATA bridges need us to indicate data xfer direction */ 3016 qc->tf.feature |= ATAPI_DMADIR; 3017 } 3018 3019 3020 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 3021 as ATAPI tape drives don't get this right otherwise */ 3022 return 0; 3023} 3024 3025static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 3026{ 3027 /* 3028 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 3029 * or 2 (IDE master + slave case). However, the former case includes 3030 * libsas hosted devices which are numbered per scsi host, leading 3031 * to devno potentially being larger than 0 but with each struct 3032 * ata_device having its own struct ata_port and struct ata_link. 3033 * To accommodate these, ignore devno and always use device number 0. 3034 */ 3035 if (likely(!sata_pmp_attached(ap))) { 3036 int link_max_devices = ata_link_max_devices(&ap->link); 3037 3038 if (link_max_devices == 1) 3039 return &ap->link.device[0]; 3040 3041 if (devno < link_max_devices) 3042 return &ap->link.device[devno]; 3043 3044 return NULL; 3045 } 3046 3047 /* 3048 * For PMP-attached devices, the device number corresponds to C 3049 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 3050 * for the device. 3051 */ 3052 if (devno < ap->nr_pmp_links) 3053 return &ap->pmp_link[devno].device[0]; 3054 3055 return NULL; 3056} 3057 3058static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 3059 const struct scsi_device *scsidev) 3060{ 3061 int devno; 3062 3063 /* skip commands not addressed to targets we simulate */ 3064 if (!sata_pmp_attached(ap)) { 3065 if (unlikely(scsidev->channel || scsidev->lun)) 3066 return NULL; 3067 devno = scsidev->id; 3068 } else { 3069 if (unlikely(scsidev->id || scsidev->lun)) 3070 return NULL; 3071 devno = scsidev->channel; 3072 } 3073 3074 return ata_find_dev(ap, devno); 3075} 3076 3077/** 3078 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3079 * @ap: ATA port to which the device is attached 3080 * @scsidev: SCSI device from which we derive the ATA device 3081 * 3082 * Given various information provided in struct scsi_cmnd, 3083 * map that onto an ATA bus, and using that mapping 3084 * determine which ata_device is associated with the 3085 * SCSI command to be sent. 3086 * 3087 * LOCKING: 3088 * spin_lock_irqsave(host lock) 3089 * 3090 * RETURNS: 3091 * Associated ATA device, or %NULL if not found. 3092 */ 3093struct ata_device * 3094ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3095{ 3096 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3097 3098 if (!ata_adapter_is_online(ap)) 3099 return NULL; 3100 3101 if (unlikely(!dev || !ata_dev_enabled(dev))) 3102 return NULL; 3103 3104 return dev; 3105} 3106 3107/* 3108 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3109 * @byte1: Byte 1 from pass-thru CDB. 3110 * 3111 * RETURNS: 3112 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3113 */ 3114static u8 3115ata_scsi_map_proto(u8 byte1) 3116{ 3117 switch((byte1 & 0x1e) >> 1) { 3118 case 3: /* Non-data */ 3119 return ATA_PROT_NODATA; 3120 3121 case 6: /* DMA */ 3122 case 10: /* UDMA Data-in */ 3123 case 11: /* UDMA Data-Out */ 3124 return ATA_PROT_DMA; 3125 3126 case 4: /* PIO Data-in */ 3127 case 5: /* PIO Data-out */ 3128 return ATA_PROT_PIO; 3129 3130 case 12: /* FPDMA */ 3131 return ATA_PROT_NCQ; 3132 3133 case 0: /* Hard Reset */ 3134 case 1: /* SRST */ 3135 case 8: /* Device Diagnostic */ 3136 case 9: /* Device Reset */ 3137 case 7: /* DMA Queued */ 3138 case 15: /* Return Response Info */ 3139 default: /* Reserved */ 3140 break; 3141 } 3142 3143 return ATA_PROT_UNKNOWN; 3144} 3145 3146/** 3147 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3148 * @qc: command structure to be initialized 3149 * 3150 * Handles either 12, 16, or 32-byte versions of the CDB. 3151 * 3152 * RETURNS: 3153 * Zero on success, non-zero on failure. 3154 */ 3155static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3156{ 3157 struct ata_taskfile *tf = &(qc->tf); 3158 struct scsi_cmnd *scmd = qc->scsicmd; 3159 struct ata_device *dev = qc->dev; 3160 const u8 *cdb = scmd->cmnd; 3161 u16 fp; 3162 u16 cdb_offset = 0; 3163 3164 /* 7Fh variable length cmd means a ata pass-thru(32) */ 3165 if (cdb[0] == VARIABLE_LENGTH_CMD) 3166 cdb_offset = 9; 3167 3168 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 3169 if (tf->protocol == ATA_PROT_UNKNOWN) { 3170 fp = 1; 3171 goto invalid_fld; 3172 } 3173 3174 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 3175 /* 3176 * When T_LENGTH is zero (No data is transferred), dir should 3177 * be DMA_NONE. 3178 */ 3179 if (scmd->sc_data_direction != DMA_NONE) { 3180 fp = 2 + cdb_offset; 3181 goto invalid_fld; 3182 } 3183 3184 if (ata_is_ncq(tf->protocol)) 3185 tf->protocol = ATA_PROT_NCQ_NODATA; 3186 } 3187 3188 /* enable LBA */ 3189 tf->flags |= ATA_TFLAG_LBA; 3190 3191 /* 3192 * 12 and 16 byte CDBs use different offsets to 3193 * provide the various register values. 3194 */ 3195 switch (cdb[0]) { 3196 case ATA_16: 3197 /* 3198 * 16-byte CDB - may contain extended commands. 3199 * 3200 * If that is the case, copy the upper byte register values. 3201 */ 3202 if (cdb[1] & 0x01) { 3203 tf->hob_feature = cdb[3]; 3204 tf->hob_nsect = cdb[5]; 3205 tf->hob_lbal = cdb[7]; 3206 tf->hob_lbam = cdb[9]; 3207 tf->hob_lbah = cdb[11]; 3208 tf->flags |= ATA_TFLAG_LBA48; 3209 } else 3210 tf->flags &= ~ATA_TFLAG_LBA48; 3211 3212 /* 3213 * Always copy low byte, device and command registers. 3214 */ 3215 tf->feature = cdb[4]; 3216 tf->nsect = cdb[6]; 3217 tf->lbal = cdb[8]; 3218 tf->lbam = cdb[10]; 3219 tf->lbah = cdb[12]; 3220 tf->device = cdb[13]; 3221 tf->command = cdb[14]; 3222 break; 3223 case ATA_12: 3224 /* 3225 * 12-byte CDB - incapable of extended commands. 3226 */ 3227 tf->flags &= ~ATA_TFLAG_LBA48; 3228 3229 tf->feature = cdb[3]; 3230 tf->nsect = cdb[4]; 3231 tf->lbal = cdb[5]; 3232 tf->lbam = cdb[6]; 3233 tf->lbah = cdb[7]; 3234 tf->device = cdb[8]; 3235 tf->command = cdb[9]; 3236 break; 3237 default: 3238 /* 3239 * 32-byte CDB - may contain extended command fields. 3240 * 3241 * If that is the case, copy the upper byte register values. 3242 */ 3243 if (cdb[10] & 0x01) { 3244 tf->hob_feature = cdb[20]; 3245 tf->hob_nsect = cdb[22]; 3246 tf->hob_lbal = cdb[16]; 3247 tf->hob_lbam = cdb[15]; 3248 tf->hob_lbah = cdb[14]; 3249 tf->flags |= ATA_TFLAG_LBA48; 3250 } else 3251 tf->flags &= ~ATA_TFLAG_LBA48; 3252 3253 tf->feature = cdb[21]; 3254 tf->nsect = cdb[23]; 3255 tf->lbal = cdb[19]; 3256 tf->lbam = cdb[18]; 3257 tf->lbah = cdb[17]; 3258 tf->device = cdb[24]; 3259 tf->command = cdb[25]; 3260 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3261 break; 3262 } 3263 3264 /* For NCQ commands copy the tag value */ 3265 if (ata_is_ncq(tf->protocol)) 3266 tf->nsect = qc->hw_tag << 3; 3267 3268 /* enforce correct master/slave bit */ 3269 tf->device = dev->devno ? 3270 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3271 3272 switch (tf->command) { 3273 /* READ/WRITE LONG use a non-standard sect_size */ 3274 case ATA_CMD_READ_LONG: 3275 case ATA_CMD_READ_LONG_ONCE: 3276 case ATA_CMD_WRITE_LONG: 3277 case ATA_CMD_WRITE_LONG_ONCE: 3278 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3279 fp = 1; 3280 goto invalid_fld; 3281 } 3282 qc->sect_size = scsi_bufflen(scmd); 3283 break; 3284 3285 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3286 case ATA_CMD_CFA_WRITE_NE: 3287 case ATA_CMD_CFA_TRANS_SECT: 3288 case ATA_CMD_CFA_WRITE_MULT_NE: 3289 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3290 case ATA_CMD_READ: 3291 case ATA_CMD_READ_EXT: 3292 case ATA_CMD_READ_QUEUED: 3293 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3294 case ATA_CMD_FPDMA_READ: 3295 case ATA_CMD_READ_MULTI: 3296 case ATA_CMD_READ_MULTI_EXT: 3297 case ATA_CMD_PIO_READ: 3298 case ATA_CMD_PIO_READ_EXT: 3299 case ATA_CMD_READ_STREAM_DMA_EXT: 3300 case ATA_CMD_READ_STREAM_EXT: 3301 case ATA_CMD_VERIFY: 3302 case ATA_CMD_VERIFY_EXT: 3303 case ATA_CMD_WRITE: 3304 case ATA_CMD_WRITE_EXT: 3305 case ATA_CMD_WRITE_FUA_EXT: 3306 case ATA_CMD_WRITE_QUEUED: 3307 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3308 case ATA_CMD_FPDMA_WRITE: 3309 case ATA_CMD_WRITE_MULTI: 3310 case ATA_CMD_WRITE_MULTI_EXT: 3311 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3312 case ATA_CMD_PIO_WRITE: 3313 case ATA_CMD_PIO_WRITE_EXT: 3314 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3315 case ATA_CMD_WRITE_STREAM_EXT: 3316 qc->sect_size = scmd->device->sector_size; 3317 break; 3318 3319 /* Everything else uses 512 byte "sectors" */ 3320 default: 3321 qc->sect_size = ATA_SECT_SIZE; 3322 } 3323 3324 /* 3325 * Set flags so that all registers will be written, pass on 3326 * write indication (used for PIO/DMA setup), result TF is 3327 * copied back and we don't whine too much about its failure. 3328 */ 3329 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3330 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3331 tf->flags |= ATA_TFLAG_WRITE; 3332 3333 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3334 3335 /* 3336 * Set transfer length. 3337 * 3338 * TODO: find out if we need to do more here to 3339 * cover scatter/gather case. 3340 */ 3341 ata_qc_set_pc_nbytes(qc); 3342 3343 /* We may not issue DMA commands if no DMA mode is set */ 3344 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3345 fp = 1; 3346 goto invalid_fld; 3347 } 3348 3349 /* We may not issue NCQ commands to devices not supporting NCQ */ 3350 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3351 fp = 1; 3352 goto invalid_fld; 3353 } 3354 3355 /* sanity check for pio multi commands */ 3356 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3357 fp = 1; 3358 goto invalid_fld; 3359 } 3360 3361 if (is_multi_taskfile(tf)) { 3362 unsigned int multi_count = 1 << (cdb[1] >> 5); 3363 3364 /* compare the passed through multi_count 3365 * with the cached multi_count of libata 3366 */ 3367 if (multi_count != dev->multi_count) 3368 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3369 multi_count); 3370 } 3371 3372 /* 3373 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3374 * SET_FEATURES - XFER MODE must be preceded/succeeded 3375 * by an update to hardware-specific registers for each 3376 * controller (i.e. the reason for ->set_piomode(), 3377 * ->set_dmamode(), and ->post_set_mode() hooks). 3378 */ 3379 if (tf->command == ATA_CMD_SET_FEATURES && 3380 tf->feature == SETFEATURES_XFER) { 3381 fp = (cdb[0] == ATA_16) ? 4 : 3; 3382 goto invalid_fld; 3383 } 3384 3385 /* 3386 * Filter TPM commands by default. These provide an 3387 * essentially uncontrolled encrypted "back door" between 3388 * applications and the disk. Set libata.allow_tpm=1 if you 3389 * have a real reason for wanting to use them. This ensures 3390 * that installed software cannot easily mess stuff up without 3391 * user intent. DVR type users will probably ship with this enabled 3392 * for movie content management. 3393 * 3394 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3395 * for this and should do in future but that it is not sufficient as 3396 * DCS is an optional feature set. Thus we also do the software filter 3397 * so that we comply with the TC consortium stated goal that the user 3398 * can turn off TC features of their system. 3399 */ 3400 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3401 fp = (cdb[0] == ATA_16) ? 14 : 9; 3402 goto invalid_fld; 3403 } 3404 3405 return 0; 3406 3407 invalid_fld: 3408 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3409 return 1; 3410} 3411 3412/** 3413 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3414 * @cmd: SCSI command being translated 3415 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3416 * @sector: Starting sector 3417 * @count: Total Range of request in logical sectors 3418 * 3419 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3420 * descriptor. 3421 * 3422 * Upto 64 entries of the format: 3423 * 63:48 Range Length 3424 * 47:0 LBA 3425 * 3426 * Range Length of 0 is ignored. 3427 * LBA's should be sorted order and not overlap. 3428 * 3429 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3430 * 3431 * Return: Number of bytes copied into sglist. 3432 */ 3433static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3434 u64 sector, u32 count) 3435{ 3436 struct scsi_device *sdp = cmd->device; 3437 size_t len = sdp->sector_size; 3438 size_t r; 3439 __le64 *buf; 3440 u32 i = 0; 3441 unsigned long flags; 3442 3443 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3444 3445 if (len > ATA_SCSI_RBUF_SIZE) 3446 len = ATA_SCSI_RBUF_SIZE; 3447 3448 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3449 buf = ((void *)ata_scsi_rbuf); 3450 memset(buf, 0, len); 3451 while (i < trmax) { 3452 u64 entry = sector | 3453 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3454 buf[i++] = __cpu_to_le64(entry); 3455 if (count <= 0xffff) 3456 break; 3457 count -= 0xffff; 3458 sector += 0xffff; 3459 } 3460 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3461 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3462 3463 return r; 3464} 3465 3466/** 3467 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3468 * @qc: Command to be translated 3469 * 3470 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3471 * an SCT Write Same command. 3472 * Based on WRITE SAME has the UNMAP flag: 3473 * 3474 * - When set translate to DSM TRIM 3475 * - When clear translate to SCT Write Same 3476 */ 3477static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3478{ 3479 struct ata_taskfile *tf = &qc->tf; 3480 struct scsi_cmnd *scmd = qc->scsicmd; 3481 struct scsi_device *sdp = scmd->device; 3482 size_t len = sdp->sector_size; 3483 struct ata_device *dev = qc->dev; 3484 const u8 *cdb = scmd->cmnd; 3485 u64 block; 3486 u32 n_block; 3487 const u32 trmax = len >> 3; 3488 u32 size; 3489 u16 fp; 3490 u8 bp = 0xff; 3491 u8 unmap = cdb[1] & 0x8; 3492 3493 /* we may not issue DMA commands if no DMA mode is set */ 3494 if (unlikely(!ata_dma_enabled(dev))) 3495 goto invalid_opcode; 3496 3497 /* 3498 * We only allow sending this command through the block layer, 3499 * as it modifies the DATA OUT buffer, which would corrupt user 3500 * memory for SG_IO commands. 3501 */ 3502 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3503 goto invalid_opcode; 3504 3505 if (unlikely(scmd->cmd_len < 16)) { 3506 fp = 15; 3507 goto invalid_fld; 3508 } 3509 scsi_16_lba_len(cdb, &block, &n_block); 3510 3511 if (!unmap || (dev->quirks & ATA_QUIRK_NOTRIM) || 3512 !ata_id_has_trim(dev->id)) { 3513 fp = 1; 3514 bp = 3; 3515 goto invalid_fld; 3516 } 3517 /* If the request is too large the cmd is invalid */ 3518 if (n_block > 0xffff * trmax) { 3519 fp = 2; 3520 goto invalid_fld; 3521 } 3522 3523 /* 3524 * WRITE SAME always has a sector sized buffer as payload, this 3525 * should never be a multiple entry S/G list. 3526 */ 3527 if (!scsi_sg_count(scmd)) 3528 goto invalid_param_len; 3529 3530 /* 3531 * size must match sector size in bytes 3532 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3533 * is defined as number of 512 byte blocks to be transferred. 3534 */ 3535 3536 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3537 if (size != len) 3538 goto invalid_param_len; 3539 3540 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3541 /* Newer devices support queued TRIM commands */ 3542 tf->protocol = ATA_PROT_NCQ; 3543 tf->command = ATA_CMD_FPDMA_SEND; 3544 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3545 tf->nsect = qc->hw_tag << 3; 3546 tf->hob_feature = (size / 512) >> 8; 3547 tf->feature = size / 512; 3548 3549 tf->auxiliary = 1; 3550 } else { 3551 tf->protocol = ATA_PROT_DMA; 3552 tf->hob_feature = 0; 3553 tf->feature = ATA_DSM_TRIM; 3554 tf->hob_nsect = (size / 512) >> 8; 3555 tf->nsect = size / 512; 3556 tf->command = ATA_CMD_DSM; 3557 } 3558 3559 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3560 ATA_TFLAG_WRITE; 3561 3562 ata_qc_set_pc_nbytes(qc); 3563 3564 return 0; 3565 3566invalid_fld: 3567 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3568 return 1; 3569invalid_param_len: 3570 /* "Parameter list length error" */ 3571 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3572 return 1; 3573invalid_opcode: 3574 /* "Invalid command operation code" */ 3575 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3576 return 1; 3577} 3578 3579/** 3580 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3581 * @dev: Target device. 3582 * @cmd: SCSI command of interest. 3583 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3584 * 3585 * Yields a subset to satisfy scsi_report_opcode() 3586 * 3587 * LOCKING: 3588 * spin_lock_irqsave(host lock) 3589 */ 3590static unsigned int ata_scsiop_maint_in(struct ata_device *dev, 3591 struct scsi_cmnd *cmd, u8 *rbuf) 3592{ 3593 u8 *cdb = cmd->cmnd; 3594 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3595 3596 if ((cdb[1] & 0x1f) != MI_REPORT_SUPPORTED_OPERATION_CODES) { 3597 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 3598 return 0; 3599 } 3600 3601 if (cdb[2] != 1 && cdb[2] != 3) { 3602 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3603 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 3604 return 0; 3605 } 3606 3607 switch (cdb[3]) { 3608 case INQUIRY: 3609 case MODE_SENSE: 3610 case MODE_SENSE_10: 3611 case READ_CAPACITY: 3612 case SERVICE_ACTION_IN_16: 3613 case REPORT_LUNS: 3614 case REQUEST_SENSE: 3615 case SYNCHRONIZE_CACHE: 3616 case SYNCHRONIZE_CACHE_16: 3617 case REZERO_UNIT: 3618 case SEEK_6: 3619 case SEEK_10: 3620 case TEST_UNIT_READY: 3621 case SEND_DIAGNOSTIC: 3622 case MAINTENANCE_IN: 3623 case READ_6: 3624 case READ_10: 3625 case WRITE_6: 3626 case WRITE_10: 3627 case ATA_12: 3628 case ATA_16: 3629 case VERIFY: 3630 case VERIFY_16: 3631 case MODE_SELECT: 3632 case MODE_SELECT_10: 3633 case START_STOP: 3634 supported = 3; 3635 break; 3636 case READ_16: 3637 supported = 3; 3638 if (dev->flags & ATA_DFLAG_CDL) { 3639 /* 3640 * CDL read descriptors map to the T2A page, that is, 3641 * rwcdlp = 0x01 and cdlp = 0x01 3642 */ 3643 rwcdlp = 0x01; 3644 cdlp = 0x01 << 3; 3645 } 3646 break; 3647 case WRITE_16: 3648 supported = 3; 3649 if (dev->flags & ATA_DFLAG_CDL) { 3650 /* 3651 * CDL write descriptors map to the T2B page, that is, 3652 * rwcdlp = 0x01 and cdlp = 0x02 3653 */ 3654 rwcdlp = 0x01; 3655 cdlp = 0x02 << 3; 3656 } 3657 break; 3658 case ZBC_IN: 3659 case ZBC_OUT: 3660 if (ata_id_zoned_cap(dev->id) || 3661 dev->class == ATA_DEV_ZAC) 3662 supported = 3; 3663 break; 3664 case SECURITY_PROTOCOL_IN: 3665 case SECURITY_PROTOCOL_OUT: 3666 if (dev->flags & ATA_DFLAG_TRUSTED) 3667 supported = 3; 3668 break; 3669 default: 3670 break; 3671 } 3672 3673 /* One command format */ 3674 rbuf[0] = rwcdlp; 3675 rbuf[1] = cdlp | supported; 3676 3677 return 4; 3678} 3679 3680/** 3681 * ata_scsi_report_zones_complete - convert ATA output 3682 * @qc: command structure returning the data 3683 * 3684 * Convert T-13 little-endian field representation into 3685 * T-10 big-endian field representation. 3686 * What a mess. 3687 */ 3688static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3689{ 3690 struct scsi_cmnd *scmd = qc->scsicmd; 3691 struct sg_mapping_iter miter; 3692 unsigned long flags; 3693 unsigned int bytes = 0; 3694 3695 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3696 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3697 3698 local_irq_save(flags); 3699 while (sg_miter_next(&miter)) { 3700 unsigned int offset = 0; 3701 3702 if (bytes == 0) { 3703 char *hdr; 3704 u32 list_length; 3705 u64 max_lba, opt_lba; 3706 u16 same; 3707 3708 /* Swizzle header */ 3709 hdr = miter.addr; 3710 list_length = get_unaligned_le32(&hdr[0]); 3711 same = get_unaligned_le16(&hdr[4]); 3712 max_lba = get_unaligned_le64(&hdr[8]); 3713 opt_lba = get_unaligned_le64(&hdr[16]); 3714 put_unaligned_be32(list_length, &hdr[0]); 3715 hdr[4] = same & 0xf; 3716 put_unaligned_be64(max_lba, &hdr[8]); 3717 put_unaligned_be64(opt_lba, &hdr[16]); 3718 offset += 64; 3719 bytes += 64; 3720 } 3721 while (offset < miter.length) { 3722 char *rec; 3723 u8 cond, type, non_seq, reset; 3724 u64 size, start, wp; 3725 3726 /* Swizzle zone descriptor */ 3727 rec = miter.addr + offset; 3728 type = rec[0] & 0xf; 3729 cond = (rec[1] >> 4) & 0xf; 3730 non_seq = (rec[1] & 2); 3731 reset = (rec[1] & 1); 3732 size = get_unaligned_le64(&rec[8]); 3733 start = get_unaligned_le64(&rec[16]); 3734 wp = get_unaligned_le64(&rec[24]); 3735 rec[0] = type; 3736 rec[1] = (cond << 4) | non_seq | reset; 3737 put_unaligned_be64(size, &rec[8]); 3738 put_unaligned_be64(start, &rec[16]); 3739 put_unaligned_be64(wp, &rec[24]); 3740 WARN_ON(offset + 64 > miter.length); 3741 offset += 64; 3742 bytes += 64; 3743 } 3744 } 3745 sg_miter_stop(&miter); 3746 local_irq_restore(flags); 3747 3748 ata_scsi_qc_complete(qc); 3749} 3750 3751static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3752{ 3753 struct ata_taskfile *tf = &qc->tf; 3754 struct scsi_cmnd *scmd = qc->scsicmd; 3755 const u8 *cdb = scmd->cmnd; 3756 u16 sect, fp = (u16)-1; 3757 u8 sa, options, bp = 0xff; 3758 u64 block; 3759 u32 n_block; 3760 3761 if (unlikely(scmd->cmd_len < 16)) { 3762 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3763 scmd->cmd_len); 3764 fp = 15; 3765 goto invalid_fld; 3766 } 3767 scsi_16_lba_len(cdb, &block, &n_block); 3768 if (n_block != scsi_bufflen(scmd)) { 3769 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3770 n_block, scsi_bufflen(scmd)); 3771 goto invalid_param_len; 3772 } 3773 sa = cdb[1] & 0x1f; 3774 if (sa != ZI_REPORT_ZONES) { 3775 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3776 fp = 1; 3777 goto invalid_fld; 3778 } 3779 /* 3780 * ZAC allows only for transfers in 512 byte blocks, 3781 * and uses a 16 bit value for the transfer count. 3782 */ 3783 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3784 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3785 goto invalid_param_len; 3786 } 3787 sect = n_block / 512; 3788 options = cdb[14] & 0xbf; 3789 3790 if (ata_ncq_enabled(qc->dev) && 3791 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3792 tf->protocol = ATA_PROT_NCQ; 3793 tf->command = ATA_CMD_FPDMA_RECV; 3794 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3795 tf->nsect = qc->hw_tag << 3; 3796 tf->feature = sect & 0xff; 3797 tf->hob_feature = (sect >> 8) & 0xff; 3798 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3799 } else { 3800 tf->command = ATA_CMD_ZAC_MGMT_IN; 3801 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3802 tf->protocol = ATA_PROT_DMA; 3803 tf->hob_feature = options; 3804 tf->hob_nsect = (sect >> 8) & 0xff; 3805 tf->nsect = sect & 0xff; 3806 } 3807 tf->device = ATA_LBA; 3808 tf->lbah = (block >> 16) & 0xff; 3809 tf->lbam = (block >> 8) & 0xff; 3810 tf->lbal = block & 0xff; 3811 tf->hob_lbah = (block >> 40) & 0xff; 3812 tf->hob_lbam = (block >> 32) & 0xff; 3813 tf->hob_lbal = (block >> 24) & 0xff; 3814 3815 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3816 qc->flags |= ATA_QCFLAG_RESULT_TF; 3817 3818 ata_qc_set_pc_nbytes(qc); 3819 3820 qc->complete_fn = ata_scsi_report_zones_complete; 3821 3822 return 0; 3823 3824invalid_fld: 3825 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3826 return 1; 3827 3828invalid_param_len: 3829 /* "Parameter list length error" */ 3830 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3831 return 1; 3832} 3833 3834static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3835{ 3836 struct ata_taskfile *tf = &qc->tf; 3837 struct scsi_cmnd *scmd = qc->scsicmd; 3838 struct ata_device *dev = qc->dev; 3839 const u8 *cdb = scmd->cmnd; 3840 u8 all, sa; 3841 u64 block; 3842 u32 n_block; 3843 u16 fp = (u16)-1; 3844 3845 if (unlikely(scmd->cmd_len < 16)) { 3846 fp = 15; 3847 goto invalid_fld; 3848 } 3849 3850 sa = cdb[1] & 0x1f; 3851 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3852 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3853 fp = 1; 3854 goto invalid_fld; 3855 } 3856 3857 scsi_16_lba_len(cdb, &block, &n_block); 3858 if (n_block) { 3859 /* 3860 * ZAC MANAGEMENT OUT doesn't define any length 3861 */ 3862 goto invalid_param_len; 3863 } 3864 3865 all = cdb[14] & 0x1; 3866 if (all) { 3867 /* 3868 * Ignore the block address (zone ID) as defined by ZBC. 3869 */ 3870 block = 0; 3871 } else if (block >= dev->n_sectors) { 3872 /* 3873 * Block must be a valid zone ID (a zone start LBA). 3874 */ 3875 fp = 2; 3876 goto invalid_fld; 3877 } 3878 3879 if (ata_ncq_enabled(qc->dev) && 3880 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3881 tf->protocol = ATA_PROT_NCQ_NODATA; 3882 tf->command = ATA_CMD_NCQ_NON_DATA; 3883 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3884 tf->nsect = qc->hw_tag << 3; 3885 tf->auxiliary = sa | ((u16)all << 8); 3886 } else { 3887 tf->protocol = ATA_PROT_NODATA; 3888 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3889 tf->feature = sa; 3890 tf->hob_feature = all; 3891 } 3892 tf->lbah = (block >> 16) & 0xff; 3893 tf->lbam = (block >> 8) & 0xff; 3894 tf->lbal = block & 0xff; 3895 tf->hob_lbah = (block >> 40) & 0xff; 3896 tf->hob_lbam = (block >> 32) & 0xff; 3897 tf->hob_lbal = (block >> 24) & 0xff; 3898 tf->device = ATA_LBA; 3899 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3900 3901 return 0; 3902 3903 invalid_fld: 3904 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3905 return 1; 3906invalid_param_len: 3907 /* "Parameter list length error" */ 3908 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3909 return 1; 3910} 3911 3912/** 3913 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3914 * @qc: Storage for translated ATA taskfile 3915 * @buf: input buffer 3916 * @len: number of valid bytes in the input buffer 3917 * @fp: out parameter for the failed field on error 3918 * 3919 * Prepare a taskfile to modify caching information for the device. 3920 * 3921 * LOCKING: 3922 * None. 3923 */ 3924static int ata_mselect_caching(struct ata_queued_cmd *qc, 3925 const u8 *buf, int len, u16 *fp) 3926{ 3927 struct ata_taskfile *tf = &qc->tf; 3928 struct ata_device *dev = qc->dev; 3929 u8 mpage[CACHE_MPAGE_LEN]; 3930 u8 wce; 3931 int i; 3932 3933 /* 3934 * The first two bytes of def_cache_mpage are a header, so offsets 3935 * in mpage are off by 2 compared to buf. Same for len. 3936 */ 3937 3938 if (len != CACHE_MPAGE_LEN - 2) { 3939 *fp = min(len, CACHE_MPAGE_LEN - 2); 3940 return -EINVAL; 3941 } 3942 3943 wce = buf[0] & (1 << 2); 3944 3945 /* 3946 * Check that read-only bits are not modified. 3947 */ 3948 ata_msense_caching(dev->id, mpage, false); 3949 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3950 if (i == 0) 3951 continue; 3952 if (mpage[i + 2] != buf[i]) { 3953 *fp = i; 3954 return -EINVAL; 3955 } 3956 } 3957 3958 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3959 tf->protocol = ATA_PROT_NODATA; 3960 tf->nsect = 0; 3961 tf->command = ATA_CMD_SET_FEATURES; 3962 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3963 return 0; 3964} 3965 3966/* 3967 * Simulate MODE SELECT control mode page, sub-page 0. 3968 */ 3969static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3970 const u8 *buf, int len, u16 *fp) 3971{ 3972 struct ata_device *dev = qc->dev; 3973 u8 mpage[CONTROL_MPAGE_LEN]; 3974 u8 d_sense; 3975 int i; 3976 3977 /* 3978 * The first two bytes of def_control_mpage are a header, so offsets 3979 * in mpage are off by 2 compared to buf. Same for len. 3980 */ 3981 3982 if (len != CONTROL_MPAGE_LEN - 2) { 3983 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3984 return -EINVAL; 3985 } 3986 3987 d_sense = buf[0] & (1 << 2); 3988 3989 /* 3990 * Check that read-only bits are not modified. 3991 */ 3992 ata_msense_control_spg0(dev, mpage, false); 3993 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3994 if (i == 0) 3995 continue; 3996 if (mpage[2 + i] != buf[i]) { 3997 *fp = i; 3998 return -EINVAL; 3999 } 4000 } 4001 if (d_sense & (1 << 2)) 4002 dev->flags |= ATA_DFLAG_D_SENSE; 4003 else 4004 dev->flags &= ~ATA_DFLAG_D_SENSE; 4005 return 0; 4006} 4007 4008/* 4009 * Translate MODE SELECT control mode page, sub-page f2h (ATA feature mode 4010 * page) into a SET FEATURES command. 4011 */ 4012static int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 4013 const u8 *buf, int len, u16 *fp) 4014{ 4015 struct ata_device *dev = qc->dev; 4016 struct ata_taskfile *tf = &qc->tf; 4017 u8 cdl_action; 4018 4019 /* 4020 * The first four bytes of ATA Feature Control mode page are a header, 4021 * so offsets in mpage are off by 4 compared to buf. Same for len. 4022 */ 4023 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 4024 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 4025 return -EINVAL; 4026 } 4027 4028 /* Check cdl_ctrl */ 4029 switch (buf[0] & 0x03) { 4030 case 0: 4031 /* Disable CDL */ 4032 ata_dev_dbg(dev, "Disabling CDL\n"); 4033 cdl_action = 0; 4034 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 4035 break; 4036 case 0x02: 4037 /* 4038 * Enable CDL. Since CDL is mutually exclusive with NCQ 4039 * priority, allow this only if NCQ priority is disabled. 4040 */ 4041 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 4042 ata_dev_err(dev, 4043 "NCQ priority must be disabled to enable CDL\n"); 4044 return -EINVAL; 4045 } 4046 ata_dev_dbg(dev, "Enabling CDL\n"); 4047 cdl_action = 1; 4048 dev->flags |= ATA_DFLAG_CDL_ENABLED; 4049 break; 4050 default: 4051 *fp = 0; 4052 return -EINVAL; 4053 } 4054 4055 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 4056 tf->protocol = ATA_PROT_NODATA; 4057 tf->command = ATA_CMD_SET_FEATURES; 4058 tf->feature = SETFEATURES_CDL; 4059 tf->nsect = cdl_action; 4060 4061 return 1; 4062} 4063 4064/** 4065 * ata_mselect_control - Simulate MODE SELECT for control page 4066 * @qc: Storage for translated ATA taskfile 4067 * @spg: target sub-page of the control page 4068 * @buf: input buffer 4069 * @len: number of valid bytes in the input buffer 4070 * @fp: out parameter for the failed field on error 4071 * 4072 * Prepare a taskfile to modify caching information for the device. 4073 * 4074 * LOCKING: 4075 * None. 4076 */ 4077static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 4078 const u8 *buf, int len, u16 *fp) 4079{ 4080 switch (spg) { 4081 case 0: 4082 return ata_mselect_control_spg0(qc, buf, len, fp); 4083 case ATA_FEATURE_SUB_MPAGE: 4084 return ata_mselect_control_ata_feature(qc, buf, len, fp); 4085 default: 4086 return -EINVAL; 4087 } 4088} 4089 4090/** 4091 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 4092 * @qc: Storage for translated ATA taskfile 4093 * 4094 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 4095 * Assume this is invoked for direct access devices (e.g. disks) only. 4096 * There should be no block descriptor for other device types. 4097 * 4098 * LOCKING: 4099 * spin_lock_irqsave(host lock) 4100 */ 4101static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 4102{ 4103 struct scsi_cmnd *scmd = qc->scsicmd; 4104 const u8 *cdb = scmd->cmnd; 4105 u8 pg, spg; 4106 unsigned six_byte, pg_len, hdr_len, bd_len; 4107 int len, ret; 4108 u16 fp = (u16)-1; 4109 u8 bp = 0xff; 4110 u8 buffer[64]; 4111 const u8 *p = buffer; 4112 4113 six_byte = (cdb[0] == MODE_SELECT); 4114 if (six_byte) { 4115 if (scmd->cmd_len < 5) { 4116 fp = 4; 4117 goto invalid_fld; 4118 } 4119 4120 len = cdb[4]; 4121 hdr_len = 4; 4122 } else { 4123 if (scmd->cmd_len < 9) { 4124 fp = 8; 4125 goto invalid_fld; 4126 } 4127 4128 len = get_unaligned_be16(&cdb[7]); 4129 hdr_len = 8; 4130 } 4131 4132 /* We only support PF=1, SP=0. */ 4133 if ((cdb[1] & 0x11) != 0x10) { 4134 fp = 1; 4135 bp = (cdb[1] & 0x01) ? 1 : 5; 4136 goto invalid_fld; 4137 } 4138 4139 /* Test early for possible overrun. */ 4140 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 4141 goto invalid_param_len; 4142 4143 /* Move past header and block descriptors. */ 4144 if (len < hdr_len) 4145 goto invalid_param_len; 4146 4147 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 4148 buffer, sizeof(buffer))) 4149 goto invalid_param_len; 4150 4151 if (six_byte) 4152 bd_len = p[3]; 4153 else 4154 bd_len = get_unaligned_be16(&p[6]); 4155 4156 len -= hdr_len; 4157 p += hdr_len; 4158 if (len < bd_len) 4159 goto invalid_param_len; 4160 if (bd_len != 0 && bd_len != 8) { 4161 fp = (six_byte) ? 3 : 6; 4162 fp += bd_len + hdr_len; 4163 goto invalid_param; 4164 } 4165 4166 len -= bd_len; 4167 p += bd_len; 4168 if (len == 0) 4169 goto skip; 4170 4171 /* Parse both possible formats for the mode page headers. */ 4172 pg = p[0] & 0x3f; 4173 if (p[0] & 0x40) { 4174 if (len < 4) 4175 goto invalid_param_len; 4176 4177 spg = p[1]; 4178 pg_len = get_unaligned_be16(&p[2]); 4179 p += 4; 4180 len -= 4; 4181 } else { 4182 if (len < 2) 4183 goto invalid_param_len; 4184 4185 spg = 0; 4186 pg_len = p[1]; 4187 p += 2; 4188 len -= 2; 4189 } 4190 4191 /* 4192 * Supported subpages: all subpages and ATA feature sub-page f2h of 4193 * the control page. 4194 */ 4195 if (spg) { 4196 switch (spg) { 4197 case ALL_SUB_MPAGES: 4198 /* All subpages is not supported for the control page */ 4199 if (pg == CONTROL_MPAGE) { 4200 fp = (p[0] & 0x40) ? 1 : 0; 4201 fp += hdr_len + bd_len; 4202 goto invalid_param; 4203 } 4204 break; 4205 case ATA_FEATURE_SUB_MPAGE: 4206 if (qc->dev->flags & ATA_DFLAG_CDL && 4207 pg == CONTROL_MPAGE) 4208 break; 4209 fallthrough; 4210 default: 4211 fp = (p[0] & 0x40) ? 1 : 0; 4212 fp += hdr_len + bd_len; 4213 goto invalid_param; 4214 } 4215 } 4216 if (pg_len > len) 4217 goto invalid_param_len; 4218 4219 switch (pg) { 4220 case CACHE_MPAGE: 4221 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4222 fp += hdr_len + bd_len; 4223 goto invalid_param; 4224 } 4225 break; 4226 case CONTROL_MPAGE: 4227 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 4228 if (ret < 0) { 4229 fp += hdr_len + bd_len; 4230 goto invalid_param; 4231 } 4232 if (!ret) 4233 goto skip; /* No ATA command to send */ 4234 break; 4235 default: 4236 /* Invalid page code */ 4237 fp = bd_len + hdr_len; 4238 goto invalid_param; 4239 } 4240 4241 /* 4242 * Only one page has changeable data, so we only support setting one 4243 * page at a time. 4244 */ 4245 if (len > pg_len) 4246 goto invalid_param; 4247 4248 return 0; 4249 4250 invalid_fld: 4251 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4252 return 1; 4253 4254 invalid_param: 4255 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4256 return 1; 4257 4258 invalid_param_len: 4259 /* "Parameter list length error" */ 4260 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4261 return 1; 4262 4263 skip: 4264 scmd->result = SAM_STAT_GOOD; 4265 return 1; 4266} 4267 4268static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4269{ 4270 if (len == 0) 4271 return ATA_CMD_TRUSTED_NONDATA; 4272 else if (send) 4273 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4274 else 4275 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4276} 4277 4278static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4279{ 4280 struct scsi_cmnd *scmd = qc->scsicmd; 4281 const u8 *cdb = scmd->cmnd; 4282 struct ata_taskfile *tf = &qc->tf; 4283 u8 secp = cdb[1]; 4284 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4285 u16 spsp = get_unaligned_be16(&cdb[2]); 4286 u32 len = get_unaligned_be32(&cdb[6]); 4287 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4288 4289 /* 4290 * We don't support the ATA "security" protocol. 4291 */ 4292 if (secp == 0xef) { 4293 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4294 return 1; 4295 } 4296 4297 if (cdb[4] & 7) { /* INC_512 */ 4298 if (len > 0xffff) { 4299 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4300 return 1; 4301 } 4302 } else { 4303 if (len > 0x01fffe00) { 4304 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4305 return 1; 4306 } 4307 4308 /* convert to the sector-based ATA addressing */ 4309 len = (len + 511) / 512; 4310 } 4311 4312 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4313 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4314 if (send) 4315 tf->flags |= ATA_TFLAG_WRITE; 4316 tf->command = ata_scsi_trusted_op(len, send, dma); 4317 tf->feature = secp; 4318 tf->lbam = spsp & 0xff; 4319 tf->lbah = spsp >> 8; 4320 4321 if (len) { 4322 tf->nsect = len & 0xff; 4323 tf->lbal = len >> 8; 4324 } else { 4325 if (!send) 4326 tf->lbah = (1 << 7); 4327 } 4328 4329 ata_qc_set_pc_nbytes(qc); 4330 return 0; 4331} 4332 4333/** 4334 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4335 * @qc: Command to be translated 4336 * 4337 * Translate a SCSI variable length CDB to specified commands. 4338 * It checks a service action value in CDB to call corresponding handler. 4339 * 4340 * RETURNS: 4341 * Zero on success, non-zero on failure 4342 * 4343 */ 4344static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4345{ 4346 struct scsi_cmnd *scmd = qc->scsicmd; 4347 const u8 *cdb = scmd->cmnd; 4348 const u16 sa = get_unaligned_be16(&cdb[8]); 4349 4350 /* 4351 * if service action represents a ata pass-thru(32) command, 4352 * then pass it to ata_scsi_pass_thru handler. 4353 */ 4354 if (sa == ATA_32) 4355 return ata_scsi_pass_thru(qc); 4356 4357 /* unsupported service action */ 4358 return 1; 4359} 4360 4361/** 4362 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4363 * @dev: ATA device 4364 * @cmd: SCSI command opcode to consider 4365 * 4366 * Look up the SCSI command given, and determine whether the 4367 * SCSI command is to be translated or simulated. 4368 * 4369 * RETURNS: 4370 * Pointer to translation function if possible, %NULL if not. 4371 */ 4372 4373static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4374{ 4375 switch (cmd) { 4376 case READ_6: 4377 case READ_10: 4378 case READ_16: 4379 4380 case WRITE_6: 4381 case WRITE_10: 4382 case WRITE_16: 4383 return ata_scsi_rw_xlat; 4384 4385 case WRITE_SAME_16: 4386 return ata_scsi_write_same_xlat; 4387 4388 case SYNCHRONIZE_CACHE: 4389 case SYNCHRONIZE_CACHE_16: 4390 if (ata_try_flush_cache(dev)) 4391 return ata_scsi_flush_xlat; 4392 break; 4393 4394 case VERIFY: 4395 case VERIFY_16: 4396 return ata_scsi_verify_xlat; 4397 4398 case ATA_12: 4399 case ATA_16: 4400 return ata_scsi_pass_thru; 4401 4402 case VARIABLE_LENGTH_CMD: 4403 return ata_scsi_var_len_cdb_xlat; 4404 4405 case MODE_SELECT: 4406 case MODE_SELECT_10: 4407 return ata_scsi_mode_select_xlat; 4408 4409 case ZBC_IN: 4410 return ata_scsi_zbc_in_xlat; 4411 4412 case ZBC_OUT: 4413 return ata_scsi_zbc_out_xlat; 4414 4415 case SECURITY_PROTOCOL_IN: 4416 case SECURITY_PROTOCOL_OUT: 4417 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4418 break; 4419 return ata_scsi_security_inout_xlat; 4420 4421 case START_STOP: 4422 return ata_scsi_start_stop_xlat; 4423 } 4424 4425 return NULL; 4426} 4427 4428int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4429{ 4430 struct ata_port *ap = dev->link->ap; 4431 u8 scsi_op = scmd->cmnd[0]; 4432 ata_xlat_func_t xlat_func; 4433 4434 /* 4435 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4436 * However, this check is done without holding the ap->lock (a libata 4437 * specific lock), so we can have received an error irq since then, 4438 * therefore we must check if EH is pending or running, while holding 4439 * ap->lock. 4440 */ 4441 if (ata_port_eh_scheduled(ap)) 4442 return SCSI_MLQUEUE_DEVICE_BUSY; 4443 4444 if (unlikely(!scmd->cmd_len)) 4445 goto bad_cdb_len; 4446 4447 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4448 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4449 goto bad_cdb_len; 4450 4451 xlat_func = ata_get_xlat_func(dev, scsi_op); 4452 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4453 /* relay SCSI command to ATAPI device */ 4454 int len = COMMAND_SIZE(scsi_op); 4455 4456 if (unlikely(len > scmd->cmd_len || 4457 len > dev->cdb_len || 4458 scmd->cmd_len > ATAPI_CDB_LEN)) 4459 goto bad_cdb_len; 4460 4461 xlat_func = atapi_xlat; 4462 } else { 4463 /* ATA_16 passthru, treat as an ATA command */ 4464 if (unlikely(scmd->cmd_len > 16)) 4465 goto bad_cdb_len; 4466 4467 xlat_func = ata_get_xlat_func(dev, scsi_op); 4468 } 4469 4470 if (xlat_func) 4471 return ata_scsi_translate(dev, scmd, xlat_func); 4472 4473 ata_scsi_simulate(dev, scmd); 4474 4475 return 0; 4476 4477 bad_cdb_len: 4478 scmd->result = DID_ERROR << 16; 4479 scsi_done(scmd); 4480 return 0; 4481} 4482 4483/** 4484 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4485 * @shost: SCSI host of command to be sent 4486 * @cmd: SCSI command to be sent 4487 * 4488 * In some cases, this function translates SCSI commands into 4489 * ATA taskfiles, and queues the taskfiles to be sent to 4490 * hardware. In other cases, this function simulates a 4491 * SCSI device by evaluating and responding to certain 4492 * SCSI commands. This creates the overall effect of 4493 * ATA and ATAPI devices appearing as SCSI devices. 4494 * 4495 * LOCKING: 4496 * ATA host lock 4497 * 4498 * RETURNS: 4499 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4500 * 0 otherwise. 4501 */ 4502int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4503{ 4504 struct ata_port *ap; 4505 struct ata_device *dev; 4506 struct scsi_device *scsidev = cmd->device; 4507 int rc = 0; 4508 unsigned long irq_flags; 4509 4510 ap = ata_shost_to_port(shost); 4511 4512 spin_lock_irqsave(ap->lock, irq_flags); 4513 4514 dev = ata_scsi_find_dev(ap, scsidev); 4515 if (likely(dev)) 4516 rc = __ata_scsi_queuecmd(cmd, dev); 4517 else { 4518 cmd->result = (DID_BAD_TARGET << 16); 4519 scsi_done(cmd); 4520 } 4521 4522 spin_unlock_irqrestore(ap->lock, irq_flags); 4523 4524 return rc; 4525} 4526EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4527 4528/** 4529 * ata_scsi_simulate - simulate SCSI command on ATA device 4530 * @dev: the target device 4531 * @cmd: SCSI command being sent to device. 4532 * 4533 * Interprets and directly executes a select list of SCSI commands 4534 * that can be handled internally. 4535 * 4536 * LOCKING: 4537 * spin_lock_irqsave(host lock) 4538 */ 4539 4540void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4541{ 4542 const u8 *scsicmd = cmd->cmnd; 4543 u8 tmp8; 4544 4545 switch(scsicmd[0]) { 4546 case INQUIRY: 4547 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_inquiry); 4548 break; 4549 4550 case MODE_SENSE: 4551 case MODE_SENSE_10: 4552 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_mode_sense); 4553 break; 4554 4555 case READ_CAPACITY: 4556 case SERVICE_ACTION_IN_16: 4557 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_read_cap); 4558 break; 4559 4560 case REPORT_LUNS: 4561 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_report_luns); 4562 break; 4563 4564 case REQUEST_SENSE: 4565 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4566 break; 4567 4568 /* if we reach this, then writeback caching is disabled, 4569 * turning this into a no-op. 4570 */ 4571 case SYNCHRONIZE_CACHE: 4572 case SYNCHRONIZE_CACHE_16: 4573 fallthrough; 4574 4575 /* no-op's, complete with success */ 4576 case REZERO_UNIT: 4577 case SEEK_6: 4578 case SEEK_10: 4579 case TEST_UNIT_READY: 4580 break; 4581 4582 case SEND_DIAGNOSTIC: 4583 tmp8 = scsicmd[1] & ~(1 << 3); 4584 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4585 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4586 break; 4587 4588 case MAINTENANCE_IN: 4589 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_maint_in); 4590 break; 4591 4592 /* all other commands */ 4593 default: 4594 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4595 /* "Invalid command operation code" */ 4596 break; 4597 } 4598 4599 scsi_done(cmd); 4600} 4601 4602int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4603{ 4604 int i, rc; 4605 4606 for (i = 0; i < host->n_ports; i++) { 4607 struct ata_port *ap = host->ports[i]; 4608 struct Scsi_Host *shost; 4609 4610 rc = -ENOMEM; 4611 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4612 if (!shost) 4613 goto err_alloc; 4614 4615 shost->eh_noresume = 1; 4616 *(struct ata_port **)&shost->hostdata[0] = ap; 4617 ap->scsi_host = shost; 4618 4619 shost->transportt = ata_scsi_transport_template; 4620 shost->unique_id = ap->print_id; 4621 shost->max_id = 16; 4622 shost->max_lun = 1; 4623 shost->max_channel = 1; 4624 shost->max_cmd_len = 32; 4625 4626 /* Schedule policy is determined by ->qc_defer() 4627 * callback and it needs to see every deferred qc. 4628 * Set host_blocked to 1 to prevent SCSI midlayer from 4629 * automatically deferring requests. 4630 */ 4631 shost->max_host_blocked = 1; 4632 4633 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4634 if (rc) 4635 goto err_alloc; 4636 } 4637 4638 return 0; 4639 4640 err_alloc: 4641 while (--i >= 0) { 4642 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4643 4644 /* scsi_host_put() is in ata_devres_release() */ 4645 scsi_remove_host(shost); 4646 } 4647 return rc; 4648} 4649 4650#ifdef CONFIG_OF 4651static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4652{ 4653 struct scsi_device *sdev = dev->sdev; 4654 struct device *d = ap->host->dev; 4655 struct device_node *np = d->of_node; 4656 struct device_node *child; 4657 4658 for_each_available_child_of_node(np, child) { 4659 int ret; 4660 u32 val; 4661 4662 ret = of_property_read_u32(child, "reg", &val); 4663 if (ret) 4664 continue; 4665 if (val == dev->devno) { 4666 dev_dbg(d, "found matching device node\n"); 4667 sdev->sdev_gendev.of_node = child; 4668 return; 4669 } 4670 } 4671} 4672#else 4673static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4674{ 4675} 4676#endif 4677 4678void ata_scsi_scan_host(struct ata_port *ap, int sync) 4679{ 4680 int tries = 5; 4681 struct ata_device *last_failed_dev = NULL; 4682 struct ata_link *link; 4683 struct ata_device *dev; 4684 4685 repeat: 4686 ata_for_each_link(link, ap, EDGE) { 4687 ata_for_each_dev(dev, link, ENABLED) { 4688 struct scsi_device *sdev; 4689 int channel = 0, id = 0; 4690 4691 if (dev->sdev) 4692 continue; 4693 4694 if (ata_is_host_link(link)) 4695 id = dev->devno; 4696 else 4697 channel = link->pmp; 4698 4699 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4700 NULL); 4701 if (!IS_ERR(sdev)) { 4702 dev->sdev = sdev; 4703 ata_scsi_assign_ofnode(dev, ap); 4704 scsi_device_put(sdev); 4705 } else { 4706 dev->sdev = NULL; 4707 } 4708 } 4709 } 4710 4711 /* If we scanned while EH was in progress or allocation 4712 * failure occurred, scan would have failed silently. Check 4713 * whether all devices are attached. 4714 */ 4715 ata_for_each_link(link, ap, EDGE) { 4716 ata_for_each_dev(dev, link, ENABLED) { 4717 if (!dev->sdev) 4718 goto exit_loop; 4719 } 4720 } 4721 exit_loop: 4722 if (!link) 4723 return; 4724 4725 /* we're missing some SCSI devices */ 4726 if (sync) { 4727 /* If caller requested synchrnous scan && we've made 4728 * any progress, sleep briefly and repeat. 4729 */ 4730 if (dev != last_failed_dev) { 4731 msleep(100); 4732 last_failed_dev = dev; 4733 goto repeat; 4734 } 4735 4736 /* We might be failing to detect boot device, give it 4737 * a few more chances. 4738 */ 4739 if (--tries) { 4740 msleep(100); 4741 goto repeat; 4742 } 4743 4744 ata_port_err(ap, 4745 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4746 } 4747 4748 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4749 round_jiffies_relative(HZ)); 4750} 4751 4752/** 4753 * ata_scsi_offline_dev - offline attached SCSI device 4754 * @dev: ATA device to offline attached SCSI device for 4755 * 4756 * This function is called from ata_eh_detach_dev() and is responsible for 4757 * taking the SCSI device attached to @dev offline. This function is 4758 * called with host lock which protects dev->sdev against clearing. 4759 * 4760 * LOCKING: 4761 * spin_lock_irqsave(host lock) 4762 * 4763 * RETURNS: 4764 * true if attached SCSI device exists, false otherwise. 4765 */ 4766bool ata_scsi_offline_dev(struct ata_device *dev) 4767{ 4768 if (dev->sdev) { 4769 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4770 return true; 4771 } 4772 return false; 4773} 4774 4775/** 4776 * ata_scsi_remove_dev - remove attached SCSI device 4777 * @dev: ATA device to remove attached SCSI device for 4778 * 4779 * This function is called from ata_eh_scsi_hotplug() and 4780 * responsible for removing the SCSI device attached to @dev. 4781 * 4782 * LOCKING: 4783 * Kernel thread context (may sleep). 4784 */ 4785static void ata_scsi_remove_dev(struct ata_device *dev) 4786{ 4787 struct ata_port *ap = dev->link->ap; 4788 struct scsi_device *sdev; 4789 unsigned long flags; 4790 4791 /* Alas, we need to grab scan_mutex to ensure SCSI device 4792 * state doesn't change underneath us and thus 4793 * scsi_device_get() always succeeds. The mutex locking can 4794 * be removed if there is __scsi_device_get() interface which 4795 * increments reference counts regardless of device state. 4796 */ 4797 mutex_lock(&ap->scsi_host->scan_mutex); 4798 spin_lock_irqsave(ap->lock, flags); 4799 4800 /* clearing dev->sdev is protected by host lock */ 4801 sdev = dev->sdev; 4802 dev->sdev = NULL; 4803 4804 if (sdev) { 4805 /* If user initiated unplug races with us, sdev can go 4806 * away underneath us after the host lock and 4807 * scan_mutex are released. Hold onto it. 4808 */ 4809 if (scsi_device_get(sdev) == 0) { 4810 /* The following ensures the attached sdev is 4811 * offline on return from ata_scsi_offline_dev() 4812 * regardless it wins or loses the race 4813 * against this function. 4814 */ 4815 scsi_device_set_state(sdev, SDEV_OFFLINE); 4816 } else { 4817 WARN_ON(1); 4818 sdev = NULL; 4819 } 4820 } 4821 4822 spin_unlock_irqrestore(ap->lock, flags); 4823 mutex_unlock(&ap->scsi_host->scan_mutex); 4824 4825 if (sdev) { 4826 ata_dev_info(dev, "detaching (SCSI %s)\n", 4827 dev_name(&sdev->sdev_gendev)); 4828 4829 scsi_remove_device(sdev); 4830 scsi_device_put(sdev); 4831 } 4832} 4833 4834static void ata_scsi_handle_link_detach(struct ata_link *link) 4835{ 4836 struct ata_port *ap = link->ap; 4837 struct ata_device *dev; 4838 4839 ata_for_each_dev(dev, link, ALL) { 4840 unsigned long flags; 4841 4842 spin_lock_irqsave(ap->lock, flags); 4843 if (!(dev->flags & ATA_DFLAG_DETACHED)) { 4844 spin_unlock_irqrestore(ap->lock, flags); 4845 continue; 4846 } 4847 4848 dev->flags &= ~ATA_DFLAG_DETACHED; 4849 spin_unlock_irqrestore(ap->lock, flags); 4850 4851 ata_scsi_remove_dev(dev); 4852 } 4853} 4854 4855/** 4856 * ata_scsi_media_change_notify - send media change event 4857 * @dev: Pointer to the disk device with media change event 4858 * 4859 * Tell the block layer to send a media change notification 4860 * event. 4861 * 4862 * LOCKING: 4863 * spin_lock_irqsave(host lock) 4864 */ 4865void ata_scsi_media_change_notify(struct ata_device *dev) 4866{ 4867 if (dev->sdev) 4868 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4869 GFP_ATOMIC); 4870} 4871 4872/** 4873 * ata_scsi_hotplug - SCSI part of hotplug 4874 * @work: Pointer to ATA port to perform SCSI hotplug on 4875 * 4876 * Perform SCSI part of hotplug. It's executed from a separate 4877 * workqueue after EH completes. This is necessary because SCSI 4878 * hot plugging requires working EH and hot unplugging is 4879 * synchronized with hot plugging with a mutex. 4880 * 4881 * LOCKING: 4882 * Kernel thread context (may sleep). 4883 */ 4884void ata_scsi_hotplug(struct work_struct *work) 4885{ 4886 struct ata_port *ap = 4887 container_of(work, struct ata_port, hotplug_task.work); 4888 int i; 4889 4890 if (ap->pflags & ATA_PFLAG_UNLOADING) 4891 return; 4892 4893 mutex_lock(&ap->scsi_scan_mutex); 4894 4895 /* Unplug detached devices. We cannot use link iterator here 4896 * because PMP links have to be scanned even if PMP is 4897 * currently not attached. Iterate manually. 4898 */ 4899 ata_scsi_handle_link_detach(&ap->link); 4900 if (ap->pmp_link) 4901 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4902 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4903 4904 /* scan for new ones */ 4905 ata_scsi_scan_host(ap, 0); 4906 4907 mutex_unlock(&ap->scsi_scan_mutex); 4908} 4909 4910/** 4911 * ata_scsi_user_scan - indication for user-initiated bus scan 4912 * @shost: SCSI host to scan 4913 * @channel: Channel to scan 4914 * @id: ID to scan 4915 * @lun: LUN to scan 4916 * 4917 * This function is called when user explicitly requests bus 4918 * scan. Set probe pending flag and invoke EH. 4919 * 4920 * LOCKING: 4921 * SCSI layer (we don't care) 4922 * 4923 * RETURNS: 4924 * Zero. 4925 */ 4926int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4927 unsigned int id, u64 lun) 4928{ 4929 struct ata_port *ap = ata_shost_to_port(shost); 4930 unsigned long flags; 4931 int devno, rc = 0; 4932 4933 if (lun != SCAN_WILD_CARD && lun) 4934 return -EINVAL; 4935 4936 if (!sata_pmp_attached(ap)) { 4937 if (channel != SCAN_WILD_CARD && channel) 4938 return -EINVAL; 4939 devno = id; 4940 } else { 4941 if (id != SCAN_WILD_CARD && id) 4942 return -EINVAL; 4943 devno = channel; 4944 } 4945 4946 spin_lock_irqsave(ap->lock, flags); 4947 4948 if (devno == SCAN_WILD_CARD) { 4949 struct ata_link *link; 4950 4951 ata_for_each_link(link, ap, EDGE) { 4952 struct ata_eh_info *ehi = &link->eh_info; 4953 ehi->probe_mask |= ATA_ALL_DEVICES; 4954 ehi->action |= ATA_EH_RESET; 4955 } 4956 } else { 4957 struct ata_device *dev = ata_find_dev(ap, devno); 4958 4959 if (dev) { 4960 struct ata_eh_info *ehi = &dev->link->eh_info; 4961 ehi->probe_mask |= 1 << dev->devno; 4962 ehi->action |= ATA_EH_RESET; 4963 } else 4964 rc = -EINVAL; 4965 } 4966 4967 if (rc == 0) { 4968 ata_port_schedule_eh(ap); 4969 spin_unlock_irqrestore(ap->lock, flags); 4970 ata_port_wait_eh(ap); 4971 } else 4972 spin_unlock_irqrestore(ap->lock, flags); 4973 4974 return rc; 4975} 4976 4977/** 4978 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4979 * @work: Pointer to ATA port to perform scsi_rescan_device() 4980 * 4981 * After ATA pass thru (SAT) commands are executed successfully, 4982 * libata need to propagate the changes to SCSI layer. 4983 * 4984 * LOCKING: 4985 * Kernel thread context (may sleep). 4986 */ 4987void ata_scsi_dev_rescan(struct work_struct *work) 4988{ 4989 struct ata_port *ap = 4990 container_of(work, struct ata_port, scsi_rescan_task.work); 4991 struct ata_link *link; 4992 struct ata_device *dev; 4993 unsigned long flags; 4994 bool do_resume; 4995 int ret = 0; 4996 4997 mutex_lock(&ap->scsi_scan_mutex); 4998 spin_lock_irqsave(ap->lock, flags); 4999 5000 ata_for_each_link(link, ap, EDGE) { 5001 ata_for_each_dev(dev, link, ENABLED) { 5002 struct scsi_device *sdev = dev->sdev; 5003 5004 /* 5005 * If the port was suspended before this was scheduled, 5006 * bail out. 5007 */ 5008 if (ap->pflags & ATA_PFLAG_SUSPENDED) 5009 goto unlock_ap; 5010 5011 if (!sdev) 5012 continue; 5013 if (scsi_device_get(sdev)) 5014 continue; 5015 5016 do_resume = dev->flags & ATA_DFLAG_RESUMING; 5017 5018 spin_unlock_irqrestore(ap->lock, flags); 5019 if (do_resume) { 5020 ret = scsi_resume_device(sdev); 5021 if (ret == -EWOULDBLOCK) { 5022 scsi_device_put(sdev); 5023 goto unlock_scan; 5024 } 5025 dev->flags &= ~ATA_DFLAG_RESUMING; 5026 } 5027 ret = scsi_rescan_device(sdev); 5028 scsi_device_put(sdev); 5029 spin_lock_irqsave(ap->lock, flags); 5030 5031 if (ret) 5032 goto unlock_ap; 5033 } 5034 } 5035 5036unlock_ap: 5037 spin_unlock_irqrestore(ap->lock, flags); 5038unlock_scan: 5039 mutex_unlock(&ap->scsi_scan_mutex); 5040 5041 /* Reschedule with a delay if scsi_rescan_device() returned an error */ 5042 if (ret) 5043 schedule_delayed_work(&ap->scsi_rescan_task, 5044 msecs_to_jiffies(5)); 5045}
~/
Read-only file preview.