1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * libata-scsi.c - helper library for ATA 4 * 5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 6 * Copyright 2003-2004 Jeff Garzik 7 * 8 * libata documentation is available via 'make {ps|pdf}docs', 9 * as Documentation/driver-api/libata.rst 10 * 11 * Hardware documentation available from 12 * - http://www.t10.org/ 13 * - http://www.t13.org/ 14 */ 15 16 #include <linux/compat.h> 17 #include <linux/slab.h> 18 #include <linux/kernel.h> 19 #include <linux/blkdev.h> 20 #include <linux/spinlock.h> 21 #include <linux/export.h> 22 #include <scsi/scsi.h> 23 #include <scsi/scsi_host.h> 24 #include <scsi/scsi_cmnd.h> 25 #include <scsi/scsi_eh.h> 26 #include <scsi/scsi_device.h> 27 #include <scsi/scsi_tcq.h> 28 #include <scsi/scsi_transport.h> 29 #include <linux/libata.h> 30 #include <linux/hdreg.h> 31 #include <linux/uaccess.h> 32 #include <linux/suspend.h> 33 #include <linux/unaligned.h> 34 #include <linux/ioprio.h> 35 #include <linux/of.h> 36 37 #include "libata.h" 38 #include "libata-transport.h" 39 40 #define ATA_SCSI_RBUF_SIZE 2048 41 42 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 43 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 44 45 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 46 47 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 48 const struct scsi_device *scsidev); 49 50 #define RW_RECOVERY_MPAGE 0x1 51 #define RW_RECOVERY_MPAGE_LEN 12 52 #define CACHE_MPAGE 0x8 53 #define CACHE_MPAGE_LEN 20 54 #define CONTROL_MPAGE 0xa 55 #define CONTROL_MPAGE_LEN 12 56 #define ALL_MPAGES 0x3f 57 #define ALL_SUB_MPAGES 0xff 58 #define CDL_T2A_SUB_MPAGE 0x07 59 #define CDL_T2B_SUB_MPAGE 0x08 60 #define CDL_T2_SUB_MPAGE_LEN 232 61 #define ATA_FEATURE_SUB_MPAGE 0xf2 62 #define ATA_FEATURE_SUB_MPAGE_LEN 16 63 64 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 65 RW_RECOVERY_MPAGE, 66 RW_RECOVERY_MPAGE_LEN - 2, 67 (1 << 7), /* AWRE */ 68 0, /* read retry count */ 69 0, 0, 0, 0, 70 0, /* write retry count */ 71 0, 0, 0 72 }; 73 74 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 75 CACHE_MPAGE, 76 CACHE_MPAGE_LEN - 2, 77 0, /* contains WCE, needs to be 0 for logic */ 78 0, 0, 0, 0, 0, 0, 0, 0, 0, 79 0, /* contains DRA, needs to be 0 for logic */ 80 0, 0, 0, 0, 0, 0, 0 81 }; 82 83 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 84 CONTROL_MPAGE, 85 CONTROL_MPAGE_LEN - 2, 86 2, /* DSENSE=0, GLTSD=1 */ 87 0, /* [QAM+QERR may be 1, see 05-359r1] */ 88 0, 0, 0, 0, 0xff, 0xff, 89 0, 30 /* extended self test time, see 05-359r1 */ 90 }; 91 92 static ssize_t ata_scsi_park_show(struct device *device, 93 struct device_attribute *attr, char *buf) 94 { 95 struct scsi_device *sdev = to_scsi_device(device); 96 struct ata_port *ap; 97 struct ata_link *link; 98 struct ata_device *dev; 99 unsigned long now; 100 unsigned int msecs; 101 int rc = 0; 102 103 ap = ata_shost_to_port(sdev->host); 104 105 spin_lock_irq(ap->lock); 106 dev = ata_scsi_find_dev(ap, sdev); 107 if (!dev) { 108 rc = -ENODEV; 109 goto unlock; 110 } 111 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 112 rc = -EOPNOTSUPP; 113 goto unlock; 114 } 115 116 link = dev->link; 117 now = jiffies; 118 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 119 link->eh_context.unloaded_mask & (1 << dev->devno) && 120 time_after(dev->unpark_deadline, now)) 121 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 122 else 123 msecs = 0; 124 125 unlock: 126 spin_unlock_irq(ap->lock); 127 128 return rc ? rc : sysfs_emit(buf, "%u\n", msecs); 129 } 130 131 static ssize_t ata_scsi_park_store(struct device *device, 132 struct device_attribute *attr, 133 const char *buf, size_t len) 134 { 135 struct scsi_device *sdev = to_scsi_device(device); 136 struct ata_port *ap; 137 struct ata_device *dev; 138 int input; 139 unsigned long flags; 140 int rc; 141 142 rc = kstrtoint(buf, 10, &input); 143 if (rc) 144 return rc; 145 if (input < -2) 146 return -EINVAL; 147 if (input > ATA_TMOUT_MAX_PARK) { 148 rc = -EOVERFLOW; 149 input = ATA_TMOUT_MAX_PARK; 150 } 151 152 ap = ata_shost_to_port(sdev->host); 153 154 spin_lock_irqsave(ap->lock, flags); 155 dev = ata_scsi_find_dev(ap, sdev); 156 if (unlikely(!dev)) { 157 rc = -ENODEV; 158 goto unlock; 159 } 160 if (dev->class != ATA_DEV_ATA && 161 dev->class != ATA_DEV_ZAC) { 162 rc = -EOPNOTSUPP; 163 goto unlock; 164 } 165 166 if (input >= 0) { 167 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 168 rc = -EOPNOTSUPP; 169 goto unlock; 170 } 171 172 dev->unpark_deadline = ata_deadline(jiffies, input); 173 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 174 ata_port_schedule_eh(ap); 175 complete(&ap->park_req_pending); 176 } else { 177 switch (input) { 178 case -1: 179 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 180 break; 181 case -2: 182 dev->flags |= ATA_DFLAG_NO_UNLOAD; 183 break; 184 } 185 } 186 unlock: 187 spin_unlock_irqrestore(ap->lock, flags); 188 189 return rc ? rc : len; 190 } 191 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 192 ata_scsi_park_show, ata_scsi_park_store); 193 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 194 195 bool ata_scsi_sense_is_valid(u8 sk, u8 asc, u8 ascq) 196 { 197 /* 198 * If sk == NO_SENSE, and asc + ascq == NO ADDITIONAL SENSE INFORMATION, 199 * then there is no sense data to add. 200 */ 201 if (sk == 0 && asc == 0 && ascq == 0) 202 return false; 203 204 /* If sk > COMPLETED, sense data is bogus. */ 205 if (sk > COMPLETED) 206 return false; 207 208 return true; 209 } 210 211 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 212 u8 sk, u8 asc, u8 ascq) 213 { 214 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 215 216 scsi_build_sense(cmd, d_sense, sk, asc, ascq); 217 } 218 219 static void ata_scsi_set_sense_information(struct ata_queued_cmd *qc) 220 { 221 u64 information; 222 223 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 224 ata_dev_dbg(qc->dev, 225 "missing result TF: can't set INFORMATION sense field\n"); 226 return; 227 } 228 229 information = ata_tf_read_block(&qc->result_tf, qc->dev); 230 if (information == U64_MAX) 231 return; 232 233 scsi_set_sense_information(qc->scsicmd->sense_buffer, 234 SCSI_SENSE_BUFFERSIZE, information); 235 } 236 237 /** 238 * ata_scsi_set_passthru_sense_fields - Set ATA fields in sense buffer 239 * @qc: ATA PASS-THROUGH command. 240 * 241 * Populates "ATA Status Return sense data descriptor" / "Fixed format 242 * sense data" with ATA taskfile fields. 243 * 244 * LOCKING: 245 * None. 246 */ 247 static void ata_scsi_set_passthru_sense_fields(struct ata_queued_cmd *qc) 248 { 249 struct ata_device *dev = qc->dev; 250 struct scsi_cmnd *cmd = qc->scsicmd; 251 struct ata_taskfile *tf = &qc->result_tf; 252 unsigned char *sb = cmd->sense_buffer; 253 254 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 255 ata_dev_dbg(dev, 256 "missing result TF: can't set ATA PT sense fields\n"); 257 return; 258 } 259 260 if ((sb[0] & 0x7f) >= 0x72) { 261 unsigned char *desc; 262 u8 len; 263 264 /* descriptor format */ 265 len = sb[7]; 266 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 267 if (!desc) { 268 if (SCSI_SENSE_BUFFERSIZE < len + 14) 269 return; 270 sb[7] = len + 14; 271 desc = sb + 8 + len; 272 } 273 desc[0] = 9; 274 desc[1] = 12; 275 /* 276 * Copy registers into sense buffer. 277 */ 278 desc[2] = 0x00; 279 desc[3] = tf->error; 280 desc[5] = tf->nsect; 281 desc[7] = tf->lbal; 282 desc[9] = tf->lbam; 283 desc[11] = tf->lbah; 284 desc[12] = tf->device; 285 desc[13] = tf->status; 286 287 /* 288 * Fill in Extend bit, and the high order bytes 289 * if applicable. 290 */ 291 if (tf->flags & ATA_TFLAG_LBA48) { 292 desc[2] |= 0x01; 293 desc[4] = tf->hob_nsect; 294 desc[6] = tf->hob_lbal; 295 desc[8] = tf->hob_lbam; 296 desc[10] = tf->hob_lbah; 297 } 298 } else { 299 /* Fixed sense format */ 300 sb[0] |= 0x80; 301 sb[3] = tf->error; 302 sb[4] = tf->status; 303 sb[5] = tf->device; 304 sb[6] = tf->nsect; 305 if (tf->flags & ATA_TFLAG_LBA48) { 306 sb[8] |= 0x80; 307 if (tf->hob_nsect) 308 sb[8] |= 0x40; 309 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 310 sb[8] |= 0x20; 311 } 312 sb[9] = tf->lbal; 313 sb[10] = tf->lbam; 314 sb[11] = tf->lbah; 315 } 316 } 317 318 static void ata_scsi_set_invalid_field(struct ata_device *dev, 319 struct scsi_cmnd *cmd, u16 field, u8 bit) 320 { 321 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 322 /* "Invalid field in CDB" */ 323 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 324 field, bit, 1); 325 } 326 327 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 328 struct scsi_cmnd *cmd, u16 field) 329 { 330 /* "Invalid field in parameter list" */ 331 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 332 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 333 field, 0xff, 0); 334 } 335 336 static struct attribute *ata_common_sdev_attrs[] = { 337 &dev_attr_unload_heads.attr, 338 NULL 339 }; 340 341 static const struct attribute_group ata_common_sdev_attr_group = { 342 .attrs = ata_common_sdev_attrs 343 }; 344 345 const struct attribute_group *ata_common_sdev_groups[] = { 346 &ata_common_sdev_attr_group, 347 NULL 348 }; 349 EXPORT_SYMBOL_GPL(ata_common_sdev_groups); 350 351 /** 352 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 353 * @sdev: SCSI device for which BIOS geometry is to be determined 354 * @unused: gendisk associated with @sdev 355 * @capacity: capacity of SCSI device 356 * @geom: location to which geometry will be output 357 * 358 * Generic bios head/sector/cylinder calculator 359 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 360 * mapping. Some situations may arise where the disk is not 361 * bootable if this is not used. 362 * 363 * LOCKING: 364 * Defined by the SCSI layer. We don't really care. 365 * 366 * RETURNS: 367 * Zero. 368 */ 369 int ata_std_bios_param(struct scsi_device *sdev, struct gendisk *unused, 370 sector_t capacity, int geom[]) 371 { 372 geom[0] = 255; 373 geom[1] = 63; 374 sector_div(capacity, 255*63); 375 geom[2] = capacity; 376 377 return 0; 378 } 379 EXPORT_SYMBOL_GPL(ata_std_bios_param); 380 381 /** 382 * ata_scsi_unlock_native_capacity - unlock native capacity 383 * @sdev: SCSI device to adjust device capacity for 384 * 385 * This function is called if a partition on @sdev extends beyond 386 * the end of the device. It requests EH to unlock HPA. 387 * 388 * LOCKING: 389 * Defined by the SCSI layer. Might sleep. 390 */ 391 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 392 { 393 struct ata_port *ap = ata_shost_to_port(sdev->host); 394 struct ata_device *dev; 395 unsigned long flags; 396 397 spin_lock_irqsave(ap->lock, flags); 398 399 dev = ata_scsi_find_dev(ap, sdev); 400 if (dev && dev->n_sectors < dev->n_native_sectors) { 401 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 402 dev->link->eh_info.action |= ATA_EH_RESET; 403 ata_port_schedule_eh(ap); 404 } 405 406 spin_unlock_irqrestore(ap->lock, flags); 407 ata_port_wait_eh(ap); 408 } 409 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 410 411 /** 412 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 413 * @ap: target port 414 * @sdev: SCSI device to get identify data for 415 * @arg: User buffer area for identify data 416 * 417 * LOCKING: 418 * Defined by the SCSI layer. We don't really care. 419 * 420 * RETURNS: 421 * Zero on success, negative errno on error. 422 */ 423 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 424 void __user *arg) 425 { 426 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 427 u16 __user *dst = arg; 428 char buf[40]; 429 430 if (!dev) 431 return -ENOMSG; 432 433 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 434 return -EFAULT; 435 436 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 437 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 438 return -EFAULT; 439 440 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 441 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 442 return -EFAULT; 443 444 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 445 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 446 return -EFAULT; 447 448 return 0; 449 } 450 451 /** 452 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 453 * @scsidev: Device to which we are issuing command 454 * @arg: User provided data for issuing command 455 * 456 * LOCKING: 457 * Defined by the SCSI layer. We don't really care. 458 * 459 * RETURNS: 460 * Zero on success, negative errno on error. 461 */ 462 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 463 { 464 int rc = 0; 465 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 466 u8 scsi_cmd[MAX_COMMAND_SIZE]; 467 u8 args[4], *argbuf = NULL; 468 int argsize = 0; 469 struct scsi_sense_hdr sshdr; 470 const struct scsi_exec_args exec_args = { 471 .sshdr = &sshdr, 472 .sense = sensebuf, 473 .sense_len = sizeof(sensebuf), 474 }; 475 int cmd_result; 476 477 if (arg == NULL) 478 return -EINVAL; 479 480 if (copy_from_user(args, arg, sizeof(args))) 481 return -EFAULT; 482 483 memset(sensebuf, 0, sizeof(sensebuf)); 484 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 485 486 if (args[3]) { 487 argsize = ATA_SECT_SIZE * args[3]; 488 argbuf = kmalloc(argsize, GFP_KERNEL); 489 if (argbuf == NULL) { 490 rc = -ENOMEM; 491 goto error; 492 } 493 494 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 495 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 496 block count in sector count field */ 497 } else { 498 scsi_cmd[1] = (3 << 1); /* Non-data */ 499 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 500 } 501 502 scsi_cmd[0] = ATA_16; 503 504 scsi_cmd[4] = args[2]; 505 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 506 scsi_cmd[6] = args[3]; 507 scsi_cmd[8] = args[1]; 508 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 509 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 510 } else { 511 scsi_cmd[6] = args[1]; 512 } 513 scsi_cmd[14] = args[0]; 514 515 /* Good values for timeout and retries? Values below 516 from scsi_ioctl_send_command() for default case... */ 517 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, argbuf, 518 argsize, 10 * HZ, 5, &exec_args); 519 if (cmd_result < 0) { 520 rc = cmd_result; 521 goto error; 522 } 523 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 524 u8 *desc = sensebuf + 8; 525 526 /* If we set cc then ATA pass-through will cause a 527 * check condition even if no error. Filter that. */ 528 if (scsi_status_is_check_condition(cmd_result)) { 529 if (sshdr.sense_key == RECOVERED_ERROR && 530 sshdr.asc == 0 && sshdr.ascq == 0x1d) 531 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 532 } 533 534 /* Send userspace a few ATA registers (same as drivers/ide) */ 535 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 536 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 537 args[0] = desc[13]; /* status */ 538 args[1] = desc[3]; /* error */ 539 args[2] = desc[5]; /* sector count (0:7) */ 540 if (copy_to_user(arg, args, sizeof(args))) 541 rc = -EFAULT; 542 } 543 } 544 545 546 if (cmd_result) { 547 rc = -EIO; 548 goto error; 549 } 550 551 if ((argbuf) 552 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 553 rc = -EFAULT; 554 error: 555 kfree(argbuf); 556 return rc; 557 } 558 559 /** 560 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 561 * @scsidev: Device to which we are issuing command 562 * @arg: User provided data for issuing command 563 * 564 * LOCKING: 565 * Defined by the SCSI layer. We don't really care. 566 * 567 * RETURNS: 568 * Zero on success, negative errno on error. 569 */ 570 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 571 { 572 int rc = 0; 573 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 574 u8 scsi_cmd[MAX_COMMAND_SIZE]; 575 u8 args[7]; 576 struct scsi_sense_hdr sshdr; 577 int cmd_result; 578 const struct scsi_exec_args exec_args = { 579 .sshdr = &sshdr, 580 .sense = sensebuf, 581 .sense_len = sizeof(sensebuf), 582 }; 583 584 if (arg == NULL) 585 return -EINVAL; 586 587 if (copy_from_user(args, arg, sizeof(args))) 588 return -EFAULT; 589 590 memset(sensebuf, 0, sizeof(sensebuf)); 591 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 592 scsi_cmd[0] = ATA_16; 593 scsi_cmd[1] = (3 << 1); /* Non-data */ 594 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 595 scsi_cmd[4] = args[1]; 596 scsi_cmd[6] = args[2]; 597 scsi_cmd[8] = args[3]; 598 scsi_cmd[10] = args[4]; 599 scsi_cmd[12] = args[5]; 600 scsi_cmd[13] = args[6] & 0x4f; 601 scsi_cmd[14] = args[0]; 602 603 /* Good values for timeout and retries? Values below 604 from scsi_ioctl_send_command() for default case... */ 605 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, NULL, 606 0, 10 * HZ, 5, &exec_args); 607 if (cmd_result < 0) { 608 rc = cmd_result; 609 goto error; 610 } 611 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 612 u8 *desc = sensebuf + 8; 613 614 /* If we set cc then ATA pass-through will cause a 615 * check condition even if no error. Filter that. */ 616 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 617 if (sshdr.sense_key == RECOVERED_ERROR && 618 sshdr.asc == 0 && sshdr.ascq == 0x1d) 619 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 620 } 621 622 /* Send userspace ATA registers */ 623 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 624 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 625 args[0] = desc[13]; /* status */ 626 args[1] = desc[3]; /* error */ 627 args[2] = desc[5]; /* sector count (0:7) */ 628 args[3] = desc[7]; /* lbal */ 629 args[4] = desc[9]; /* lbam */ 630 args[5] = desc[11]; /* lbah */ 631 args[6] = desc[12]; /* select */ 632 if (copy_to_user(arg, args, sizeof(args))) 633 rc = -EFAULT; 634 } 635 } 636 637 if (cmd_result) { 638 rc = -EIO; 639 goto error; 640 } 641 642 error: 643 return rc; 644 } 645 646 static bool ata_ioc32(struct ata_port *ap) 647 { 648 if (ap->flags & ATA_FLAG_PIO_DMA) 649 return true; 650 if (ap->pflags & ATA_PFLAG_PIO32) 651 return true; 652 return false; 653 } 654 655 /* 656 * This handles both native and compat commands, so anything added 657 * here must have a compatible argument, or check in_compat_syscall() 658 */ 659 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 660 unsigned int cmd, void __user *arg) 661 { 662 unsigned long val; 663 int rc = -EINVAL; 664 unsigned long flags; 665 666 switch (cmd) { 667 case HDIO_GET_32BIT: 668 spin_lock_irqsave(ap->lock, flags); 669 val = ata_ioc32(ap); 670 spin_unlock_irqrestore(ap->lock, flags); 671 #ifdef CONFIG_COMPAT 672 if (in_compat_syscall()) 673 return put_user(val, (compat_ulong_t __user *)arg); 674 #endif 675 return put_user(val, (unsigned long __user *)arg); 676 677 case HDIO_SET_32BIT: 678 val = (unsigned long) arg; 679 rc = 0; 680 spin_lock_irqsave(ap->lock, flags); 681 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 682 if (val) 683 ap->pflags |= ATA_PFLAG_PIO32; 684 else 685 ap->pflags &= ~ATA_PFLAG_PIO32; 686 } else { 687 if (val != ata_ioc32(ap)) 688 rc = -EINVAL; 689 } 690 spin_unlock_irqrestore(ap->lock, flags); 691 return rc; 692 693 case HDIO_GET_IDENTITY: 694 return ata_get_identity(ap, scsidev, arg); 695 696 case HDIO_DRIVE_CMD: 697 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 698 return -EACCES; 699 return ata_cmd_ioctl(scsidev, arg); 700 701 case HDIO_DRIVE_TASK: 702 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 703 return -EACCES; 704 return ata_task_ioctl(scsidev, arg); 705 706 default: 707 rc = -ENOTTY; 708 break; 709 } 710 711 return rc; 712 } 713 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 714 715 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 716 void __user *arg) 717 { 718 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 719 scsidev, cmd, arg); 720 } 721 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 722 723 /** 724 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 725 * @dev: ATA device to which the new command is attached 726 * @cmd: SCSI command that originated this ATA command 727 * 728 * Obtain a reference to an unused ata_queued_cmd structure, 729 * which is the basic libata structure representing a single 730 * ATA command sent to the hardware. 731 * 732 * If a command was available, fill in the SCSI-specific 733 * portions of the structure with information on the 734 * current command. 735 * 736 * LOCKING: 737 * spin_lock_irqsave(host lock) 738 * 739 * RETURNS: 740 * Command allocated, or %NULL if none available. 741 */ 742 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 743 struct scsi_cmnd *cmd) 744 { 745 struct ata_port *ap = dev->link->ap; 746 struct ata_queued_cmd *qc; 747 int tag; 748 749 if (unlikely(ata_port_is_frozen(ap))) 750 goto fail; 751 752 if (ap->flags & ATA_FLAG_SAS_HOST) { 753 /* 754 * SAS hosts may queue > ATA_MAX_QUEUE commands so use 755 * unique per-device budget token as a tag. 756 */ 757 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE)) 758 goto fail; 759 tag = cmd->budget_token; 760 } else { 761 tag = scsi_cmd_to_rq(cmd)->tag; 762 } 763 764 qc = __ata_qc_from_tag(ap, tag); 765 qc->tag = qc->hw_tag = tag; 766 qc->ap = ap; 767 qc->dev = dev; 768 769 ata_qc_reinit(qc); 770 771 qc->scsicmd = cmd; 772 qc->scsidone = scsi_done; 773 774 qc->sg = scsi_sglist(cmd); 775 qc->n_elem = scsi_sg_count(cmd); 776 777 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 778 qc->flags |= ATA_QCFLAG_QUIET; 779 780 return qc; 781 782 fail: 783 set_host_byte(cmd, DID_OK); 784 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL); 785 scsi_done(cmd); 786 return NULL; 787 } 788 789 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 790 { 791 struct scsi_cmnd *scmd = qc->scsicmd; 792 793 qc->extrabytes = scmd->extra_len; 794 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 795 } 796 797 /** 798 * ata_to_sense_error - convert ATA error to SCSI error 799 * @drv_stat: value contained in ATA status register 800 * @drv_err: value contained in ATA error register 801 * @sk: the sense key we'll fill out 802 * @asc: the additional sense code we'll fill out 803 * @ascq: the additional sense code qualifier we'll fill out 804 * 805 * Converts an ATA error into a SCSI error. Fill out pointers to 806 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 807 * format sense blocks. 808 * 809 * LOCKING: 810 * spin_lock_irqsave(host lock) 811 */ 812 static void ata_to_sense_error(u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, 813 u8 *ascq) 814 { 815 int i; 816 817 /* Based on the 3ware driver translation table */ 818 static const unsigned char sense_table[][4] = { 819 /* BBD|ECC|ID|MAR */ 820 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 821 // Device busy Aborted command 822 /* BBD|ECC|ID */ 823 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 824 // Device busy Aborted command 825 /* ECC|MC|MARK */ 826 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 827 // Device fault Hardware error 828 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 829 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 830 // Data CRC error SCSI parity error 831 /* MC|ID|ABRT|TRK0|MARK */ 832 {0x37, NOT_READY, 0x04, 0x00}, 833 // Unit offline Not ready 834 /* MCR|MARK */ 835 {0x09, NOT_READY, 0x04, 0x00}, 836 // Unrecovered disk error Not ready 837 /* Bad address mark */ 838 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 839 // Address mark not found for data field 840 /* TRK0 - Track 0 not found */ 841 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 842 // Hardware error 843 /* Abort: 0x04 is not translated here, see below */ 844 /* Media change request */ 845 {0x08, NOT_READY, 0x04, 0x00}, 846 // FIXME: faking offline 847 /* SRV/IDNF - ID not found */ 848 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 849 // Logical address out of range 850 /* MC - Media Changed */ 851 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 852 // Not ready to ready change, medium may have changed 853 /* ECC - Uncorrectable ECC error */ 854 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 855 // Unrecovered read error 856 /* BBD - block marked bad */ 857 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 858 // Block marked bad Medium error, unrecovered read error 859 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 860 }; 861 static const unsigned char stat_table[][4] = { 862 /* Busy: must be first because BUSY means no other bits valid */ 863 { ATA_BUSY, ABORTED_COMMAND, 0x00, 0x00 }, 864 /* Device fault: INTERNAL TARGET FAILURE */ 865 { ATA_DF, HARDWARE_ERROR, 0x44, 0x00 }, 866 /* Corrected data error */ 867 { ATA_CORR, RECOVERED_ERROR, 0x00, 0x00 }, 868 869 { 0xFF, 0xFF, 0xFF, 0xFF }, /* END mark */ 870 }; 871 872 /* 873 * Is this an error we can process/parse 874 */ 875 if (drv_stat & ATA_BUSY) { 876 drv_err = 0; /* Ignore the err bits, they're invalid */ 877 } 878 879 if (drv_err) { 880 /* Look for drv_err */ 881 for (i = 0; sense_table[i][0] != 0xFF; i++) { 882 /* Look for best matches first */ 883 if ((sense_table[i][0] & drv_err) == 884 sense_table[i][0]) { 885 *sk = sense_table[i][1]; 886 *asc = sense_table[i][2]; 887 *ascq = sense_table[i][3]; 888 return; 889 } 890 } 891 } 892 893 /* 894 * Fall back to interpreting status bits. Note that if the drv_err 895 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 896 * is not descriptive enough. 897 */ 898 for (i = 0; stat_table[i][0] != 0xFF; i++) { 899 if (stat_table[i][0] & drv_stat) { 900 *sk = stat_table[i][1]; 901 *asc = stat_table[i][2]; 902 *ascq = stat_table[i][3]; 903 return; 904 } 905 } 906 907 /* 908 * We need a sensible error return here, which is tricky, and one 909 * that won't cause people to do things like return a disk wrongly. 910 */ 911 *sk = ABORTED_COMMAND; 912 *asc = 0x00; 913 *ascq = 0x00; 914 } 915 916 /* 917 * ata_gen_passthru_sense - Generate check condition sense block. 918 * @qc: Command that completed. 919 * 920 * This function is specific to the ATA pass through commands. 921 * Regardless of whether the command errored or not, return a sense 922 * block. If there was no error, we get the request from an ATA 923 * passthrough command, so we use the following sense data: 924 * sk = RECOVERED ERROR 925 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 926 * 927 * 928 * LOCKING: 929 * None. 930 */ 931 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 932 { 933 struct ata_device *dev = qc->dev; 934 struct scsi_cmnd *cmd = qc->scsicmd; 935 struct ata_taskfile *tf = &qc->result_tf; 936 u8 sense_key, asc, ascq; 937 938 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 939 ata_dev_dbg(dev, 940 "missing result TF: can't generate ATA PT sense data\n"); 941 if (qc->err_mask) 942 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 943 return; 944 } 945 946 /* 947 * Use ata_to_sense_error() to map status register bits 948 * onto sense key, asc & ascq. 949 */ 950 if (qc->err_mask || 951 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 952 ata_to_sense_error(tf->status, tf->error, 953 &sense_key, &asc, &ascq); 954 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 955 } else { 956 /* 957 * ATA PASS-THROUGH INFORMATION AVAILABLE 958 * 959 * Note: we are supposed to call ata_scsi_set_sense(), which 960 * respects the D_SENSE bit, instead of unconditionally 961 * generating the sense data in descriptor format. However, 962 * because hdparm, hddtemp, and udisks incorrectly assume sense 963 * data in descriptor format, without even looking at the 964 * RESPONSE CODE field in the returned sense data (to see which 965 * format the returned sense data is in), we are stuck with 966 * being bug compatible with older kernels. 967 */ 968 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 969 } 970 } 971 972 /** 973 * ata_gen_ata_sense - generate a SCSI fixed sense block 974 * @qc: Command that we are erroring out 975 * 976 * Generate sense block for a failed ATA command @qc. 977 * 978 * LOCKING: 979 * None. 980 */ 981 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 982 { 983 struct ata_device *dev = qc->dev; 984 struct scsi_cmnd *cmd = qc->scsicmd; 985 struct ata_taskfile *tf = &qc->result_tf; 986 u8 sense_key, asc, ascq; 987 988 if (ata_dev_disabled(dev)) { 989 /* Device disabled after error recovery */ 990 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 991 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 992 return; 993 } 994 995 if (ata_id_is_locked(dev->id)) { 996 /* Security locked */ 997 /* LOGICAL UNIT ACCESS NOT AUTHORIZED */ 998 ata_scsi_set_sense(dev, cmd, DATA_PROTECT, 0x74, 0x71); 999 return; 1000 } 1001 1002 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 1003 ata_dev_dbg(dev, 1004 "Missing result TF: reporting aborted command\n"); 1005 goto aborted; 1006 } 1007 1008 /* Use ata_to_sense_error() to map status register bits 1009 * onto sense key, asc & ascq. 1010 */ 1011 if (qc->err_mask || 1012 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1013 ata_to_sense_error(tf->status, tf->error, 1014 &sense_key, &asc, &ascq); 1015 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1016 return; 1017 } 1018 1019 /* Could not decode error */ 1020 ata_dev_warn(dev, 1021 "Could not decode error 0x%x, status 0x%x (err_mask=0x%x)\n", 1022 tf->error, tf->status, qc->err_mask); 1023 aborted: 1024 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1025 } 1026 1027 void ata_scsi_sdev_config(struct scsi_device *sdev) 1028 { 1029 sdev->use_10_for_rw = 1; 1030 sdev->use_10_for_ms = 1; 1031 sdev->no_write_same = 1; 1032 1033 /* Schedule policy is determined by ->qc_defer() callback and 1034 * it needs to see every deferred qc. Set dev_blocked to 1 to 1035 * prevent SCSI midlayer from automatically deferring 1036 * requests. 1037 */ 1038 sdev->max_device_blocked = 1; 1039 } 1040 1041 /** 1042 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1043 * @rq: request to be checked 1044 * 1045 * ATAPI commands which transfer variable length data to host 1046 * might overflow due to application error or hardware bug. This 1047 * function checks whether overflow should be drained and ignored 1048 * for @request. 1049 * 1050 * LOCKING: 1051 * None. 1052 * 1053 * RETURNS: 1054 * 1 if ; otherwise, 0. 1055 */ 1056 bool ata_scsi_dma_need_drain(struct request *rq) 1057 { 1058 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1059 1060 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1061 } 1062 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1063 1064 int ata_scsi_dev_config(struct scsi_device *sdev, struct queue_limits *lim, 1065 struct ata_device *dev) 1066 { 1067 int depth = 1; 1068 1069 if (!ata_id_has_unload(dev->id)) 1070 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1071 1072 /* configure max sectors */ 1073 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1074 lim->max_hw_sectors = dev->max_sectors; 1075 1076 if (dev->class == ATA_DEV_ATAPI) { 1077 sdev->sector_size = ATA_SECT_SIZE; 1078 1079 /* set DMA padding */ 1080 lim->dma_pad_mask = ATA_DMA_PAD_SZ - 1; 1081 1082 /* make room for appending the drain */ 1083 lim->max_segments--; 1084 1085 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1086 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1087 if (!sdev->dma_drain_buf) { 1088 ata_dev_err(dev, "drain buffer allocation failed\n"); 1089 return -ENOMEM; 1090 } 1091 } else { 1092 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1093 1094 /* 1095 * Ask the sd driver to issue START STOP UNIT on runtime suspend 1096 * and resume and shutdown only. For system level suspend/resume, 1097 * devices power state is handled directly by libata EH. 1098 * Given that disks are always spun up on system resume, also 1099 * make sure that the sd driver forces runtime suspended disks 1100 * to be resumed to correctly reflect the power state of the 1101 * device. 1102 */ 1103 sdev->manage_runtime_start_stop = 1; 1104 sdev->manage_shutdown = 1; 1105 sdev->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 1149 int 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 } 1172 EXPORT_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 1187 int 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 } 1197 EXPORT_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 */ 1213 void 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 } 1233 EXPORT_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 */ 1250 static 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 */ 1309 static 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 */ 1337 static 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 */ 1353 static 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 */ 1369 static 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 */ 1382 static 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 */ 1399 static 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 1501 invalid_fld: 1502 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1503 return 1; 1504 1505 out_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 1510 nothing_to_do: 1511 scmd->result = SAM_STAT_GOOD; 1512 return 1; 1513 } 1514 1515 static 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 */ 1548 static 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 */ 1638 invalid_fld: 1639 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1640 return 1; 1641 1642 out_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 1647 nothing_to_do: 1648 scmd->result = SAM_STAT_GOOD; 1649 return 1; 1650 } 1651 1652 static void ata_scsi_qc_done(struct ata_queued_cmd *qc, bool set_result, 1653 u32 scmd_result) 1654 { 1655 struct scsi_cmnd *cmd = qc->scsicmd; 1656 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1657 1658 ata_qc_free(qc); 1659 1660 if (set_result) 1661 cmd->result = scmd_result; 1662 done(cmd); 1663 } 1664 1665 void ata_scsi_deferred_qc_work(struct work_struct *work) 1666 { 1667 struct ata_port *ap = 1668 container_of(work, struct ata_port, deferred_qc_work); 1669 struct ata_queued_cmd *qc; 1670 unsigned long flags; 1671 1672 spin_lock_irqsave(ap->lock, flags); 1673 1674 /* 1675 * If we still have a deferred qc and we are not in EH, issue it. In 1676 * such case, we should not need any more deferring the qc, so warn if 1677 * qc_defer() says otherwise. 1678 */ 1679 qc = ap->deferred_qc; 1680 if (qc && !ata_port_eh_scheduled(ap)) { 1681 WARN_ON_ONCE(ap->ops->qc_defer(qc)); 1682 ap->deferred_qc = NULL; 1683 ata_qc_issue(qc); 1684 } 1685 1686 spin_unlock_irqrestore(ap->lock, flags); 1687 } 1688 1689 void ata_scsi_requeue_deferred_qc(struct ata_port *ap) 1690 { 1691 struct ata_queued_cmd *qc = ap->deferred_qc; 1692 1693 lockdep_assert_held(ap->lock); 1694 1695 /* 1696 * If we have a deferred qc when a reset occurs or NCQ commands fail, 1697 * do not try to be smart about what to do with this deferred command 1698 * and simply requeue it by completing it with DID_REQUEUE. 1699 */ 1700 if (qc) { 1701 ap->deferred_qc = NULL; 1702 cancel_work(&ap->deferred_qc_work); 1703 ata_scsi_qc_done(qc, true, DID_REQUEUE << 16); 1704 } 1705 } 1706 1707 static void ata_scsi_schedule_deferred_qc(struct ata_port *ap) 1708 { 1709 struct ata_queued_cmd *qc = ap->deferred_qc; 1710 1711 lockdep_assert_held(ap->lock); 1712 1713 /* 1714 * If we have a deferred qc, then qc_defer() is defined and we can use 1715 * this callback to determine if this qc is good to go, unless EH has 1716 * been scheduled. 1717 */ 1718 if (!qc) 1719 return; 1720 1721 if (ata_port_eh_scheduled(ap)) { 1722 ata_scsi_requeue_deferred_qc(ap); 1723 return; 1724 } 1725 if (!ap->ops->qc_defer(qc)) 1726 queue_work(system_highpri_wq, &ap->deferred_qc_work); 1727 } 1728 1729 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1730 { 1731 struct ata_port *ap = qc->ap; 1732 struct scsi_cmnd *cmd = qc->scsicmd; 1733 u8 *cdb = cmd->cmnd; 1734 bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID; 1735 bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12; 1736 bool is_ck_cond_request = cdb[2] & 0x20; 1737 bool is_error = qc->err_mask != 0; 1738 1739 /* For ATA pass thru (SAT) commands, generate a sense block if 1740 * user mandated it or if there's an error. Note that if we 1741 * generate because the user forced us to [CK_COND=1], a check 1742 * condition is generated and the ATA register values are returned 1743 * whether the command completed successfully or not. If there 1744 * was no error, and CK_COND=1, we use the following sense data: 1745 * sk = RECOVERED ERROR 1746 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1747 */ 1748 if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) { 1749 if (!have_sense) 1750 ata_gen_passthru_sense(qc); 1751 ata_scsi_set_passthru_sense_fields(qc); 1752 if (is_ck_cond_request) 1753 set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); 1754 } else if (is_error) { 1755 if (!have_sense) 1756 ata_gen_ata_sense(qc); 1757 ata_scsi_set_sense_information(qc); 1758 } 1759 1760 ata_scsi_qc_done(qc, false, 0); 1761 1762 ata_scsi_schedule_deferred_qc(ap); 1763 } 1764 1765 static int ata_scsi_qc_issue(struct ata_port *ap, struct ata_queued_cmd *qc) 1766 { 1767 int ret; 1768 1769 if (!ap->ops->qc_defer) 1770 goto issue; 1771 1772 /* 1773 * If we already have a deferred qc, then rely on the SCSI layer to 1774 * requeue and defer all incoming commands until the deferred qc is 1775 * processed, once all on-going commands complete. 1776 */ 1777 if (ap->deferred_qc) { 1778 ata_qc_free(qc); 1779 return SCSI_MLQUEUE_DEVICE_BUSY; 1780 } 1781 1782 /* Check if the command needs to be deferred. */ 1783 ret = ap->ops->qc_defer(qc); 1784 switch (ret) { 1785 case 0: 1786 break; 1787 case ATA_DEFER_LINK: 1788 ret = SCSI_MLQUEUE_DEVICE_BUSY; 1789 break; 1790 case ATA_DEFER_PORT: 1791 ret = SCSI_MLQUEUE_HOST_BUSY; 1792 break; 1793 default: 1794 WARN_ON_ONCE(1); 1795 ret = SCSI_MLQUEUE_HOST_BUSY; 1796 break; 1797 } 1798 1799 if (ret) { 1800 /* 1801 * We must defer this qc: if this is not an NCQ command, keep 1802 * this qc as a deferred one and report to the SCSI layer that 1803 * we issued it so that it is not requeued. The deferred qc will 1804 * be issued with the port deferred_qc_work once all on-going 1805 * commands complete. 1806 */ 1807 if (!ata_is_ncq(qc->tf.protocol)) { 1808 ap->deferred_qc = qc; 1809 return 0; 1810 } 1811 1812 /* Force a requeue of the command to defer its execution. */ 1813 ata_qc_free(qc); 1814 return ret; 1815 } 1816 1817 issue: 1818 ata_qc_issue(qc); 1819 1820 return 0; 1821 } 1822 1823 /** 1824 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1825 * @dev: ATA device to which the command is addressed 1826 * @cmd: SCSI command to execute 1827 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1828 * 1829 * Our ->queuecommand() function has decided that the SCSI 1830 * command issued can be directly translated into an ATA 1831 * command, rather than handled internally. 1832 * 1833 * This function sets up an ata_queued_cmd structure for the 1834 * SCSI command, and sends that ata_queued_cmd to the hardware. 1835 * 1836 * The xlat_func argument (actor) returns 0 if ready to execute 1837 * ATA command, else 1 to finish translation. If 1 is returned 1838 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1839 * to be set reflecting an error condition or clean (early) 1840 * termination. 1841 * 1842 * LOCKING: 1843 * spin_lock_irqsave(host lock) 1844 * 1845 * RETURNS: 1846 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY or SCSI_MLQUEUE_HOST_BUSY if the 1847 * command needs to be deferred. 1848 */ 1849 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1850 ata_xlat_func_t xlat_func) 1851 { 1852 struct ata_port *ap = dev->link->ap; 1853 struct ata_queued_cmd *qc; 1854 1855 lockdep_assert_held(ap->lock); 1856 1857 /* 1858 * ata_scsi_qc_new() calls scsi_done(cmd) in case of failure. So we 1859 * have nothing further to do when allocating a qc fails. 1860 */ 1861 qc = ata_scsi_qc_new(dev, cmd); 1862 if (!qc) 1863 return 0; 1864 1865 /* data is present; dma-map it */ 1866 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1867 cmd->sc_data_direction == DMA_TO_DEVICE) { 1868 if (unlikely(scsi_bufflen(cmd) < 1)) { 1869 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1870 cmd->result = (DID_ERROR << 16); 1871 goto done; 1872 } 1873 1874 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1875 qc->dma_dir = cmd->sc_data_direction; 1876 } 1877 1878 qc->complete_fn = ata_scsi_qc_complete; 1879 1880 if (xlat_func(qc)) 1881 goto done; 1882 1883 return ata_scsi_qc_issue(ap, qc); 1884 1885 done: 1886 ata_qc_free(qc); 1887 scsi_done(cmd); 1888 return 0; 1889 } 1890 1891 /** 1892 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1893 * @dev: Target device. 1894 * @cmd: SCSI command of interest. 1895 * @actor: Callback hook for desired SCSI command simulator 1896 * 1897 * Takes care of the hard work of simulating a SCSI command... 1898 * Mapping the response buffer, calling the command's handler, 1899 * and handling the handler's return value. This return value 1900 * indicates whether the handler wishes the SCSI command to be 1901 * completed successfully (0), or not (in which case cmd->result 1902 * and sense buffer are assumed to be set). 1903 * 1904 * LOCKING: 1905 * spin_lock_irqsave(host lock) 1906 */ 1907 static void ata_scsi_rbuf_fill(struct ata_device *dev, struct scsi_cmnd *cmd, 1908 unsigned int (*actor)(struct ata_device *dev, 1909 struct scsi_cmnd *cmd, u8 *rbuf)) 1910 { 1911 unsigned long flags; 1912 unsigned int len; 1913 1914 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1915 1916 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1917 len = actor(dev, cmd, ata_scsi_rbuf); 1918 if (len) { 1919 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1920 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1921 cmd->result = SAM_STAT_GOOD; 1922 if (scsi_bufflen(cmd) > len) 1923 scsi_set_resid(cmd, scsi_bufflen(cmd) - len); 1924 } 1925 1926 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1927 } 1928 1929 /** 1930 * ata_scsiop_inq_std - Simulate standard INQUIRY command 1931 * @dev: Target device. 1932 * @cmd: SCSI command of interest. 1933 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1934 * 1935 * Returns standard device identification data associated 1936 * with non-VPD INQUIRY command output. 1937 * 1938 * LOCKING: 1939 * spin_lock_irqsave(host lock) 1940 */ 1941 static unsigned int ata_scsiop_inq_std(struct ata_device *dev, 1942 struct scsi_cmnd *cmd, u8 *rbuf) 1943 { 1944 static const u8 versions[] = { 1945 0x00, 1946 0x60, /* SAM-3 (no version claimed) */ 1947 1948 0x03, 1949 0x20, /* SBC-2 (no version claimed) */ 1950 1951 0x03, 1952 0x00 /* SPC-3 (no version claimed) */ 1953 }; 1954 static const u8 versions_zbc[] = { 1955 0x00, 1956 0xA0, /* SAM-5 (no version claimed) */ 1957 1958 0x06, 1959 0x00, /* SBC-4 (no version claimed) */ 1960 1961 0x05, 1962 0xC0, /* SPC-5 (no version claimed) */ 1963 1964 0x60, 1965 0x24, /* ZBC r05 */ 1966 }; 1967 1968 u8 hdr[] = { 1969 TYPE_DISK, 1970 0, 1971 0x5, /* claim SPC-3 version compatibility */ 1972 2, 1973 95 - 4, 1974 0, 1975 0, 1976 2 1977 }; 1978 1979 /* 1980 * Set the SCSI Removable Media Bit (RMB) if the ATA removable media 1981 * device bit (obsolete since ATA-8 ACS) is set. 1982 */ 1983 if (ata_id_removable(dev->id)) 1984 hdr[1] |= (1 << 7); 1985 1986 if (dev->class == ATA_DEV_ZAC) { 1987 hdr[0] = TYPE_ZBC; 1988 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1989 } 1990 1991 if (dev->flags & ATA_DFLAG_CDL) 1992 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 1993 1994 memcpy(rbuf, hdr, sizeof(hdr)); 1995 memcpy(&rbuf[8], "ATA ", 8); 1996 ata_id_string(dev->id, &rbuf[16], ATA_ID_PROD, 16); 1997 1998 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1999 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2000 if (strncmp(&rbuf[32], " ", 4) == 0) 2001 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV, 4); 2002 2003 if (rbuf[32] == 0 || rbuf[32] == ' ') 2004 memcpy(&rbuf[32], "n/a ", 4); 2005 2006 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 2007 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2008 else 2009 memcpy(rbuf + 58, versions, sizeof(versions)); 2010 2011 /* 2012 * Include all 8 possible version descriptors, even if not all of 2013 * them are popoulated. 2014 */ 2015 return 96; 2016 } 2017 2018 /** 2019 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2020 * @dev: Target device. 2021 * @cmd: SCSI command of interest. 2022 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2023 * 2024 * Returns list of inquiry VPD pages available. 2025 * 2026 * LOCKING: 2027 * spin_lock_irqsave(host lock) 2028 */ 2029 static unsigned int ata_scsiop_inq_00(struct ata_device *dev, 2030 struct scsi_cmnd *cmd, u8 *rbuf) 2031 { 2032 int i, num_pages = 0; 2033 static const u8 pages[] = { 2034 0x00, /* page 0x00, this page */ 2035 0x80, /* page 0x80, unit serial no page */ 2036 0x83, /* page 0x83, device ident page */ 2037 0x89, /* page 0x89, ata info page */ 2038 0xb0, /* page 0xb0, block limits page */ 2039 0xb1, /* page 0xb1, block device characteristics page */ 2040 0xb2, /* page 0xb2, thin provisioning page */ 2041 0xb6, /* page 0xb6, zoned block device characteristics */ 2042 0xb9, /* page 0xb9, concurrent positioning ranges */ 2043 }; 2044 2045 for (i = 0; i < sizeof(pages); i++) { 2046 if (pages[i] == 0xb6 && !ata_dev_is_zac(dev)) 2047 continue; 2048 rbuf[num_pages + 4] = pages[i]; 2049 num_pages++; 2050 } 2051 rbuf[3] = num_pages; /* number of supported VPD pages */ 2052 2053 return get_unaligned_be16(&rbuf[2]) + 4; 2054 } 2055 2056 /** 2057 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2058 * @dev: Target device. 2059 * @cmd: SCSI command of interest. 2060 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2061 * 2062 * Returns ATA device serial number. 2063 * 2064 * LOCKING: 2065 * spin_lock_irqsave(host lock) 2066 */ 2067 static unsigned int ata_scsiop_inq_80(struct ata_device *dev, 2068 struct scsi_cmnd *cmd, u8 *rbuf) 2069 { 2070 static const u8 hdr[] = { 2071 0, 2072 0x80, /* this page code */ 2073 0, 2074 ATA_ID_SERNO_LEN, /* page len */ 2075 }; 2076 2077 memcpy(rbuf, hdr, sizeof(hdr)); 2078 ata_id_string(dev->id, (unsigned char *) &rbuf[4], 2079 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2080 2081 return get_unaligned_be16(&rbuf[2]) + 4; 2082 } 2083 2084 /** 2085 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2086 * @dev: Target device. 2087 * @cmd: SCSI command of interest. 2088 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2089 * 2090 * Yields two logical unit device identification designators: 2091 * - vendor specific ASCII containing the ATA serial number 2092 * - SAT defined "t10 vendor id based" containing ASCII vendor 2093 * name ("ATA "), model and serial numbers. 2094 * 2095 * LOCKING: 2096 * spin_lock_irqsave(host lock) 2097 */ 2098 static unsigned int ata_scsiop_inq_83(struct ata_device *dev, 2099 struct scsi_cmnd *cmd, u8 *rbuf) 2100 { 2101 const int sat_model_serial_desc_len = 68; 2102 int num; 2103 2104 rbuf[1] = 0x83; /* this page code */ 2105 num = 4; 2106 2107 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2108 rbuf[num + 0] = 2; 2109 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2110 num += 4; 2111 ata_id_string(dev->id, (unsigned char *) rbuf + num, 2112 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2113 num += ATA_ID_SERNO_LEN; 2114 2115 /* SAT defined lu model and serial numbers descriptor */ 2116 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2117 rbuf[num + 0] = 2; 2118 rbuf[num + 1] = 1; 2119 rbuf[num + 3] = sat_model_serial_desc_len; 2120 num += 4; 2121 memcpy(rbuf + num, "ATA ", 8); 2122 num += 8; 2123 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2124 ATA_ID_PROD_LEN); 2125 num += ATA_ID_PROD_LEN; 2126 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2127 ATA_ID_SERNO_LEN); 2128 num += ATA_ID_SERNO_LEN; 2129 2130 if (ata_id_has_wwn(dev->id)) { 2131 /* SAT defined lu world wide name */ 2132 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2133 rbuf[num + 0] = 1; 2134 rbuf[num + 1] = 3; 2135 rbuf[num + 3] = ATA_ID_WWN_LEN; 2136 num += 4; 2137 ata_id_string(dev->id, (unsigned char *) rbuf + num, 2138 ATA_ID_WWN, ATA_ID_WWN_LEN); 2139 num += ATA_ID_WWN_LEN; 2140 } 2141 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2142 2143 return get_unaligned_be16(&rbuf[2]) + 4; 2144 } 2145 2146 /** 2147 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2148 * @dev: Target device. 2149 * @cmd: SCSI command of interest. 2150 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2151 * 2152 * Yields SAT-specified ATA VPD page. 2153 * 2154 * LOCKING: 2155 * spin_lock_irqsave(host lock) 2156 */ 2157 static unsigned int ata_scsiop_inq_89(struct ata_device *dev, 2158 struct scsi_cmnd *cmd, u8 *rbuf) 2159 { 2160 rbuf[1] = 0x89; /* our page code */ 2161 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2162 rbuf[3] = (0x238 & 0xff); 2163 2164 memcpy(&rbuf[8], "linux ", 8); 2165 memcpy(&rbuf[16], "libata ", 16); 2166 memcpy(&rbuf[32], DRV_VERSION, 4); 2167 2168 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2169 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2170 /* TODO: PMP? */ 2171 2172 /* we don't store the ATA device signature, so we fake it */ 2173 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2174 rbuf[40] = 0x1; 2175 rbuf[48] = 0x1; 2176 2177 rbuf[56] = ATA_CMD_ID_ATA; 2178 2179 memcpy(&rbuf[60], &dev->id[0], 512); 2180 2181 return get_unaligned_be16(&rbuf[2]) + 4; 2182 } 2183 2184 /** 2185 * ata_scsiop_inq_b0 - Simulate INQUIRY VPD page B0, Block Limits 2186 * @dev: Target device. 2187 * @cmd: SCSI command of interest. 2188 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2189 * 2190 * Return data for the VPD page B0h (Block Limits). 2191 * 2192 * LOCKING: 2193 * spin_lock_irqsave(host lock) 2194 */ 2195 static unsigned int ata_scsiop_inq_b0(struct ata_device *dev, 2196 struct scsi_cmnd *cmd, u8 *rbuf) 2197 { 2198 u16 min_io_sectors; 2199 2200 rbuf[1] = 0xb0; 2201 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2202 2203 /* 2204 * Optimal transfer length granularity. 2205 * 2206 * This is always one physical block, but for disks with a smaller 2207 * logical than physical sector size we need to figure out what the 2208 * latter is. 2209 */ 2210 min_io_sectors = 1 << ata_id_log2_per_physical_sector(dev->id); 2211 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2212 2213 /* 2214 * Optimal unmap granularity. 2215 * 2216 * The ATA spec doesn't even know about a granularity or alignment 2217 * for the TRIM command. We can leave away most of the unmap related 2218 * VPD page entries, but we have specifify a granularity to signal 2219 * that we support some form of unmap - in thise case via WRITE SAME 2220 * with the unmap bit set. 2221 */ 2222 if (ata_id_has_trim(dev->id)) { 2223 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2224 2225 if (dev->quirks & ATA_QUIRK_MAX_TRIM_128M) 2226 max_blocks = 128 << (20 - SECTOR_SHIFT); 2227 2228 put_unaligned_be64(max_blocks, &rbuf[36]); 2229 put_unaligned_be32(1, &rbuf[28]); 2230 } 2231 2232 return get_unaligned_be16(&rbuf[2]) + 4; 2233 } 2234 2235 /** 2236 * ata_scsiop_inq_b1 - Simulate INQUIRY VPD page B1, Block Device 2237 * Characteristics 2238 * @dev: Target device. 2239 * @cmd: SCSI command of interest. 2240 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2241 * 2242 * Return data for the VPD page B1h (Block Device Characteristics). 2243 * 2244 * LOCKING: 2245 * spin_lock_irqsave(host lock) 2246 */ 2247 static unsigned int ata_scsiop_inq_b1(struct ata_device *dev, 2248 struct scsi_cmnd *cmd, u8 *rbuf) 2249 { 2250 int form_factor = ata_id_form_factor(dev->id); 2251 int media_rotation_rate = ata_id_rotation_rate(dev->id); 2252 u8 zoned = ata_id_zoned_cap(dev->id); 2253 2254 rbuf[1] = 0xb1; 2255 rbuf[3] = 0x3c; 2256 rbuf[4] = media_rotation_rate >> 8; 2257 rbuf[5] = media_rotation_rate; 2258 rbuf[7] = form_factor; 2259 if (zoned) 2260 rbuf[8] = (zoned << 4); 2261 2262 return get_unaligned_be16(&rbuf[2]) + 4; 2263 } 2264 2265 /** 2266 * ata_scsiop_inq_b2 - Simulate INQUIRY VPD page B2, Logical Block 2267 * Provisioning 2268 * @dev: Target device. 2269 * @cmd: SCSI command of interest. 2270 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2271 * 2272 * Return data for the VPD page B2h (Logical Block Provisioning). 2273 * 2274 * LOCKING: 2275 * spin_lock_irqsave(host lock) 2276 */ 2277 static unsigned int ata_scsiop_inq_b2(struct ata_device *dev, 2278 struct scsi_cmnd *cmd, u8 *rbuf) 2279 { 2280 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2281 rbuf[1] = 0xb2; 2282 rbuf[3] = 0x4; 2283 rbuf[5] = 1 << 6; /* TPWS */ 2284 2285 return get_unaligned_be16(&rbuf[2]) + 4; 2286 } 2287 2288 /** 2289 * ata_scsiop_inq_b6 - Simulate INQUIRY VPD page B6, Zoned Block Device 2290 * Characteristics 2291 * @dev: Target device. 2292 * @cmd: SCSI command of interest. 2293 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2294 * 2295 * Return data for the VPD page B2h (Zoned Block Device Characteristics). 2296 * 2297 * LOCKING: 2298 * spin_lock_irqsave(host lock) 2299 */ 2300 static unsigned int ata_scsiop_inq_b6(struct ata_device *dev, 2301 struct scsi_cmnd *cmd, u8 *rbuf) 2302 { 2303 if (!ata_dev_is_zac(dev)) { 2304 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2305 return 0; 2306 } 2307 2308 /* 2309 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2310 */ 2311 rbuf[1] = 0xb6; 2312 rbuf[3] = 0x3C; 2313 2314 /* 2315 * URSWRZ bit is only meaningful for host-managed ZAC drives 2316 */ 2317 if (dev->zac_zoned_cap & 1) 2318 rbuf[4] |= 1; 2319 put_unaligned_be32(dev->zac_zones_optimal_open, &rbuf[8]); 2320 put_unaligned_be32(dev->zac_zones_optimal_nonseq, &rbuf[12]); 2321 put_unaligned_be32(dev->zac_zones_max_open, &rbuf[16]); 2322 2323 return get_unaligned_be16(&rbuf[2]) + 4; 2324 } 2325 2326 /** 2327 * ata_scsiop_inq_b9 - Simulate INQUIRY VPD page B9, Concurrent Positioning 2328 * Ranges 2329 * @dev: Target device. 2330 * @cmd: SCSI command of interest. 2331 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2332 * 2333 * Return data for the VPD page B9h (Concurrent Positioning Ranges). 2334 * 2335 * LOCKING: 2336 * spin_lock_irqsave(host lock) 2337 */ 2338 static unsigned int ata_scsiop_inq_b9(struct ata_device *dev, 2339 struct scsi_cmnd *cmd, u8 *rbuf) 2340 { 2341 struct ata_cpr_log *cpr_log = dev->cpr_log; 2342 u8 *desc = &rbuf[64]; 2343 int i; 2344 2345 if (!cpr_log) { 2346 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2347 return 0; 2348 } 2349 2350 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2351 rbuf[1] = 0xb9; 2352 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2353 2354 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2355 desc[0] = cpr_log->cpr[i].num; 2356 desc[1] = cpr_log->cpr[i].num_storage_elements; 2357 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2358 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2359 } 2360 2361 return get_unaligned_be16(&rbuf[2]) + 4; 2362 } 2363 2364 /** 2365 * ata_scsiop_inquiry - Simulate INQUIRY command 2366 * @dev: Target device. 2367 * @cmd: SCSI command of interest. 2368 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2369 * 2370 * Returns data associated with an INQUIRY command output. 2371 * 2372 * LOCKING: 2373 * spin_lock_irqsave(host lock) 2374 */ 2375 static unsigned int ata_scsiop_inquiry(struct ata_device *dev, 2376 struct scsi_cmnd *cmd, u8 *rbuf) 2377 { 2378 const u8 *scsicmd = cmd->cmnd; 2379 2380 /* is CmdDt set? */ 2381 if (scsicmd[1] & 2) { 2382 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2383 return 0; 2384 } 2385 2386 /* Is EVPD clear? */ 2387 if ((scsicmd[1] & 1) == 0) 2388 return ata_scsiop_inq_std(dev, cmd, rbuf); 2389 2390 switch (scsicmd[2]) { 2391 case 0x00: 2392 return ata_scsiop_inq_00(dev, cmd, rbuf); 2393 case 0x80: 2394 return ata_scsiop_inq_80(dev, cmd, rbuf); 2395 case 0x83: 2396 return ata_scsiop_inq_83(dev, cmd, rbuf); 2397 case 0x89: 2398 return ata_scsiop_inq_89(dev, cmd, rbuf); 2399 case 0xb0: 2400 return ata_scsiop_inq_b0(dev, cmd, rbuf); 2401 case 0xb1: 2402 return ata_scsiop_inq_b1(dev, cmd, rbuf); 2403 case 0xb2: 2404 return ata_scsiop_inq_b2(dev, cmd, rbuf); 2405 case 0xb6: 2406 return ata_scsiop_inq_b6(dev, cmd, rbuf); 2407 case 0xb9: 2408 return ata_scsiop_inq_b9(dev, cmd, rbuf); 2409 default: 2410 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2411 return 0; 2412 } 2413 } 2414 2415 /** 2416 * modecpy - Prepare response for MODE SENSE 2417 * @dest: output buffer 2418 * @src: data being copied 2419 * @n: length of mode page 2420 * @changeable: whether changeable parameters are requested 2421 * 2422 * Generate a generic MODE SENSE page for either current or changeable 2423 * parameters. 2424 * 2425 * LOCKING: 2426 * None. 2427 */ 2428 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2429 { 2430 if (changeable) { 2431 memcpy(dest, src, 2); 2432 memset(dest + 2, 0, n - 2); 2433 } else { 2434 memcpy(dest, src, n); 2435 } 2436 } 2437 2438 /** 2439 * ata_msense_caching - Simulate MODE SENSE caching info page 2440 * @id: device IDENTIFY data 2441 * @buf: output buffer 2442 * @changeable: whether changeable parameters are requested 2443 * 2444 * Generate a caching info page, which conditionally indicates 2445 * write caching to the SCSI layer, depending on device 2446 * capabilities. 2447 * 2448 * LOCKING: 2449 * None. 2450 */ 2451 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2452 { 2453 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2454 if (changeable) { 2455 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2456 } else { 2457 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2458 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2459 } 2460 return sizeof(def_cache_mpage); 2461 } 2462 2463 /* 2464 * Simulate MODE SENSE control mode page, sub-page 0. 2465 */ 2466 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2467 bool changeable) 2468 { 2469 modecpy(buf, def_control_mpage, 2470 sizeof(def_control_mpage), changeable); 2471 if (changeable) { 2472 /* ata_mselect_control() */ 2473 buf[2] |= (1 << 2); 2474 } else { 2475 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2476 2477 /* descriptor format sense data */ 2478 buf[2] |= (d_sense << 2); 2479 } 2480 2481 return sizeof(def_control_mpage); 2482 } 2483 2484 /* 2485 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2486 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2487 * only, take care of overflows. 2488 */ 2489 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2490 { 2491 u32 limit = get_unaligned_le32(buf); 2492 2493 return min_t(u32, limit / 10000, 65535); 2494 } 2495 2496 /* 2497 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2498 * (command duration limits T2A and T2B mode pages). 2499 */ 2500 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2501 u8 spg) 2502 { 2503 u8 *b, *cdl, *desc; 2504 u32 policy; 2505 int i; 2506 2507 if (!(dev->flags & ATA_DFLAG_CDL) || !dev->cdl) 2508 return 0; 2509 2510 cdl = dev->cdl->desc_log_buf; 2511 2512 /* 2513 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2514 * are a header. The PAGE LENGTH field is the size of the page 2515 * excluding the header. 2516 */ 2517 buf[0] = CONTROL_MPAGE; 2518 buf[1] = spg; 2519 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2520 if (spg == CDL_T2A_SUB_MPAGE) { 2521 /* 2522 * Read descriptors map to the T2A page: 2523 * set perf_vs_duration_guidleine. 2524 */ 2525 buf[7] = (cdl[0] & 0x03) << 4; 2526 desc = cdl + 64; 2527 } else { 2528 /* Write descriptors map to the T2B page */ 2529 desc = cdl + 288; 2530 } 2531 2532 /* Fill the T2 page descriptors */ 2533 b = &buf[8]; 2534 policy = get_unaligned_le32(&cdl[0]); 2535 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2536 /* t2cdlunits: fixed to 10ms */ 2537 b[0] = 0x0a; 2538 2539 /* Max inactive time and its policy */ 2540 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2541 b[6] = ((policy >> 8) & 0x0f) << 4; 2542 2543 /* Max active time and its policy */ 2544 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2545 b[6] |= (policy >> 4) & 0x0f; 2546 2547 /* Command duration guideline and its policy */ 2548 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2549 b[14] = policy & 0x0f; 2550 } 2551 2552 return CDL_T2_SUB_MPAGE_LEN; 2553 } 2554 2555 /* 2556 * Simulate MODE SENSE control mode page, sub-page f2h 2557 * (ATA feature control mode page). 2558 */ 2559 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2560 u8 *buf) 2561 { 2562 /* PS=0, SPF=1 */ 2563 buf[0] = CONTROL_MPAGE | (1 << 6); 2564 buf[1] = ATA_FEATURE_SUB_MPAGE; 2565 2566 /* 2567 * The first four bytes of ATA Feature Control mode page are a header. 2568 * The PAGE LENGTH field is the size of the page excluding the header. 2569 */ 2570 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2571 2572 if (dev->flags & ATA_DFLAG_CDL_ENABLED) 2573 buf[4] = 0x02; /* T2A and T2B pages enabled */ 2574 else 2575 buf[4] = 0; 2576 2577 return ATA_FEATURE_SUB_MPAGE_LEN; 2578 } 2579 2580 /** 2581 * ata_msense_control - Simulate MODE SENSE control mode page 2582 * @dev: ATA device of interest 2583 * @buf: output buffer 2584 * @spg: sub-page code 2585 * @changeable: whether changeable parameters are requested 2586 * 2587 * Generate a generic MODE SENSE control mode page. 2588 * 2589 * LOCKING: 2590 * None. 2591 */ 2592 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2593 u8 spg, bool changeable) 2594 { 2595 unsigned int n; 2596 2597 switch (spg) { 2598 case 0: 2599 return ata_msense_control_spg0(dev, buf, changeable); 2600 case CDL_T2A_SUB_MPAGE: 2601 case CDL_T2B_SUB_MPAGE: 2602 return ata_msense_control_spgt2(dev, buf, spg); 2603 case ATA_FEATURE_SUB_MPAGE: 2604 return ata_msense_control_ata_feature(dev, buf); 2605 case ALL_SUB_MPAGES: 2606 n = ata_msense_control_spg0(dev, buf, changeable); 2607 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2608 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2B_SUB_MPAGE); 2609 n += ata_msense_control_ata_feature(dev, buf + n); 2610 return n; 2611 default: 2612 return 0; 2613 } 2614 } 2615 2616 /** 2617 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2618 * @buf: output buffer 2619 * @changeable: whether changeable parameters are requested 2620 * 2621 * Generate a generic MODE SENSE r/w error recovery page. 2622 * 2623 * LOCKING: 2624 * None. 2625 */ 2626 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2627 { 2628 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2629 changeable); 2630 return sizeof(def_rw_recovery_mpage); 2631 } 2632 2633 /** 2634 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2635 * @dev: Target device. 2636 * @cmd: SCSI command of interest. 2637 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2638 * 2639 * Simulate MODE SENSE commands. Assume this is invoked for direct 2640 * access devices (e.g. disks) only. There should be no block 2641 * descriptor for other device types. 2642 * 2643 * LOCKING: 2644 * spin_lock_irqsave(host lock) 2645 */ 2646 static unsigned int ata_scsiop_mode_sense(struct ata_device *dev, 2647 struct scsi_cmnd *cmd, u8 *rbuf) 2648 { 2649 u8 *scsicmd = cmd->cmnd, *p = rbuf; 2650 static const u8 sat_blk_desc[] = { 2651 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2652 0, 2653 0, 0x2, 0x0 /* block length: 512 bytes */ 2654 }; 2655 u8 pg, spg; 2656 unsigned int ebd, page_control, six_byte; 2657 u8 dpofua = 0, bp = 0xff; 2658 u16 fp; 2659 2660 six_byte = (scsicmd[0] == MODE_SENSE); 2661 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2662 /* 2663 * LLBA bit in msense(10) ignored (compliant) 2664 */ 2665 2666 page_control = scsicmd[2] >> 6; 2667 switch (page_control) { 2668 case 0: /* current */ 2669 case 1: /* changeable */ 2670 case 2: /* defaults */ 2671 break; /* supported */ 2672 case 3: /* saved */ 2673 goto saving_not_supp; 2674 default: 2675 fp = 2; 2676 bp = 6; 2677 goto invalid_fld; 2678 } 2679 2680 if (six_byte) 2681 p += 4 + (ebd ? 8 : 0); 2682 else 2683 p += 8 + (ebd ? 8 : 0); 2684 2685 pg = scsicmd[2] & 0x3f; 2686 spg = scsicmd[3]; 2687 2688 /* 2689 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2690 * the control page. 2691 */ 2692 if (spg) { 2693 switch (spg) { 2694 case ALL_SUB_MPAGES: 2695 break; 2696 case CDL_T2A_SUB_MPAGE: 2697 case CDL_T2B_SUB_MPAGE: 2698 case ATA_FEATURE_SUB_MPAGE: 2699 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2700 break; 2701 fallthrough; 2702 default: 2703 fp = 3; 2704 goto invalid_fld; 2705 } 2706 } 2707 2708 switch(pg) { 2709 case RW_RECOVERY_MPAGE: 2710 p += ata_msense_rw_recovery(p, page_control == 1); 2711 break; 2712 2713 case CACHE_MPAGE: 2714 p += ata_msense_caching(dev->id, p, page_control == 1); 2715 break; 2716 2717 case CONTROL_MPAGE: 2718 p += ata_msense_control(dev, p, spg, page_control == 1); 2719 break; 2720 2721 case ALL_MPAGES: 2722 p += ata_msense_rw_recovery(p, page_control == 1); 2723 p += ata_msense_caching(dev->id, p, page_control == 1); 2724 p += ata_msense_control(dev, p, spg, page_control == 1); 2725 break; 2726 2727 default: /* invalid page code */ 2728 fp = 2; 2729 goto invalid_fld; 2730 } 2731 2732 if (dev->flags & ATA_DFLAG_FUA) 2733 dpofua = 1 << 4; 2734 2735 if (six_byte) { 2736 rbuf[0] = p - rbuf - 1; 2737 rbuf[2] |= dpofua; 2738 if (ebd) { 2739 rbuf[3] = sizeof(sat_blk_desc); 2740 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2741 } 2742 2743 return rbuf[0] + 1; 2744 } 2745 2746 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2747 rbuf[3] |= dpofua; 2748 if (ebd) { 2749 rbuf[7] = sizeof(sat_blk_desc); 2750 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2751 } 2752 2753 return get_unaligned_be16(&rbuf[0]) + 2; 2754 2755 invalid_fld: 2756 ata_scsi_set_invalid_field(dev, cmd, fp, bp); 2757 return 0; 2758 2759 saving_not_supp: 2760 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2761 /* "Saving parameters not supported" */ 2762 return 0; 2763 } 2764 2765 /** 2766 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2767 * @dev: Target device. 2768 * @cmd: SCSI command of interest. 2769 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2770 * 2771 * Simulate READ CAPACITY commands. 2772 * 2773 * LOCKING: 2774 * None. 2775 */ 2776 static unsigned int ata_scsiop_read_cap(struct ata_device *dev, 2777 struct scsi_cmnd *cmd, u8 *rbuf) 2778 { 2779 u8 *scsicmd = cmd->cmnd; 2780 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2781 u32 sector_size; /* physical sector size in bytes */ 2782 u8 log2_per_phys; 2783 u16 lowest_aligned; 2784 2785 sector_size = ata_id_logical_sector_size(dev->id); 2786 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2787 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2788 2789 if (scsicmd[0] == READ_CAPACITY) { 2790 if (last_lba >= 0xffffffffULL) 2791 last_lba = 0xffffffff; 2792 2793 /* sector count, 32-bit */ 2794 rbuf[0] = last_lba >> (8 * 3); 2795 rbuf[1] = last_lba >> (8 * 2); 2796 rbuf[2] = last_lba >> (8 * 1); 2797 rbuf[3] = last_lba; 2798 2799 /* sector size */ 2800 rbuf[4] = sector_size >> (8 * 3); 2801 rbuf[5] = sector_size >> (8 * 2); 2802 rbuf[6] = sector_size >> (8 * 1); 2803 rbuf[7] = sector_size; 2804 2805 return 8; 2806 } 2807 2808 /* 2809 * READ CAPACITY 16 command is defined as a service action 2810 * (SERVICE_ACTION_IN_16 command). 2811 */ 2812 if (scsicmd[0] != SERVICE_ACTION_IN_16 || 2813 (scsicmd[1] & 0x1f) != SAI_READ_CAPACITY_16) { 2814 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2815 return 0; 2816 } 2817 2818 /* sector count, 64-bit */ 2819 rbuf[0] = last_lba >> (8 * 7); 2820 rbuf[1] = last_lba >> (8 * 6); 2821 rbuf[2] = last_lba >> (8 * 5); 2822 rbuf[3] = last_lba >> (8 * 4); 2823 rbuf[4] = last_lba >> (8 * 3); 2824 rbuf[5] = last_lba >> (8 * 2); 2825 rbuf[6] = last_lba >> (8 * 1); 2826 rbuf[7] = last_lba; 2827 2828 /* sector size */ 2829 rbuf[ 8] = sector_size >> (8 * 3); 2830 rbuf[ 9] = sector_size >> (8 * 2); 2831 rbuf[10] = sector_size >> (8 * 1); 2832 rbuf[11] = sector_size; 2833 2834 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 2835 rbuf[12] = (1 << 4); /* RC_BASIS */ 2836 rbuf[13] = log2_per_phys; 2837 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2838 rbuf[15] = lowest_aligned; 2839 2840 if (ata_id_has_trim(dev->id) && !(dev->quirks & ATA_QUIRK_NOTRIM)) { 2841 rbuf[14] |= 0x80; /* LBPME */ 2842 2843 if (ata_id_has_zero_after_trim(dev->id) && 2844 dev->quirks & ATA_QUIRK_ZERO_AFTER_TRIM) { 2845 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2846 rbuf[14] |= 0x40; /* LBPRZ */ 2847 } 2848 } 2849 2850 return 16; 2851 } 2852 2853 /** 2854 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2855 * @dev: Target device. 2856 * @cmd: SCSI command of interest. 2857 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2858 * 2859 * Simulate REPORT LUNS command. 2860 * 2861 * LOCKING: 2862 * spin_lock_irqsave(host lock) 2863 */ 2864 static unsigned int ata_scsiop_report_luns(struct ata_device *dev, 2865 struct scsi_cmnd *cmd, u8 *rbuf) 2866 { 2867 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2868 2869 return 16; 2870 } 2871 2872 /* 2873 * ATAPI devices typically report zero for their SCSI version, and sometimes 2874 * deviate from the spec WRT response data format. If SCSI version is 2875 * reported as zero like normal, then we make the following fixups: 2876 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2877 * modern device. 2878 * 2) Ensure response data format / ATAPI information are always correct. 2879 */ 2880 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2881 { 2882 u8 buf[4]; 2883 2884 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2885 if (buf[2] == 0) { 2886 buf[2] = 0x5; 2887 buf[3] = 0x32; 2888 } 2889 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2890 } 2891 2892 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2893 { 2894 struct scsi_cmnd *cmd = qc->scsicmd; 2895 unsigned int err_mask = qc->err_mask; 2896 2897 /* handle completion from EH */ 2898 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2899 2900 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2901 ata_gen_passthru_sense(qc); 2902 2903 /* SCSI EH automatically locks door if sdev->locked is 2904 * set. Sometimes door lock request continues to 2905 * fail, for example, when no media is present. This 2906 * creates a loop - SCSI EH issues door lock which 2907 * fails and gets invoked again to acquire sense data 2908 * for the failed command. 2909 * 2910 * If door lock fails, always clear sdev->locked to 2911 * avoid this infinite loop. 2912 * 2913 * This may happen before SCSI scan is complete. Make 2914 * sure qc->dev->sdev isn't NULL before dereferencing. 2915 */ 2916 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2917 qc->dev->sdev->locked = 0; 2918 2919 ata_scsi_qc_done(qc, true, SAM_STAT_CHECK_CONDITION); 2920 return; 2921 } 2922 2923 /* successful completion path */ 2924 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2925 atapi_fixup_inquiry(cmd); 2926 2927 ata_scsi_qc_done(qc, true, SAM_STAT_GOOD); 2928 } 2929 /** 2930 * atapi_xlat - Initialize PACKET taskfile 2931 * @qc: command structure to be initialized 2932 * 2933 * LOCKING: 2934 * spin_lock_irqsave(host lock) 2935 * 2936 * RETURNS: 2937 * Zero on success, non-zero on failure. 2938 */ 2939 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2940 { 2941 struct scsi_cmnd *scmd = qc->scsicmd; 2942 struct ata_device *dev = qc->dev; 2943 int nodata = (scmd->sc_data_direction == DMA_NONE); 2944 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2945 unsigned int nbytes; 2946 2947 memset(qc->cdb, 0, dev->cdb_len); 2948 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2949 2950 qc->complete_fn = atapi_qc_complete; 2951 2952 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2953 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2954 qc->tf.flags |= ATA_TFLAG_WRITE; 2955 } 2956 2957 qc->tf.command = ATA_CMD_PACKET; 2958 ata_qc_set_pc_nbytes(qc); 2959 2960 /* check whether ATAPI DMA is safe */ 2961 if (!nodata && !using_pio && atapi_check_dma(qc)) 2962 using_pio = 1; 2963 2964 /* Some controller variants snoop this value for Packet 2965 * transfers to do state machine and FIFO management. Thus we 2966 * want to set it properly, and for DMA where it is 2967 * effectively meaningless. 2968 */ 2969 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2970 2971 /* Most ATAPI devices which honor transfer chunk size don't 2972 * behave according to the spec when odd chunk size which 2973 * matches the transfer length is specified. If the number of 2974 * bytes to transfer is 2n+1. According to the spec, what 2975 * should happen is to indicate that 2n+1 is going to be 2976 * transferred and transfer 2n+2 bytes where the last byte is 2977 * padding. 2978 * 2979 * In practice, this doesn't happen. ATAPI devices first 2980 * indicate and transfer 2n bytes and then indicate and 2981 * transfer 2 bytes where the last byte is padding. 2982 * 2983 * This inconsistency confuses several controllers which 2984 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2985 * These controllers use actual number of transferred bytes to 2986 * update DMA pointer and transfer of 4n+2 bytes make those 2987 * controller push DMA pointer by 4n+4 bytes because SATA data 2988 * FISes are aligned to 4 bytes. This causes data corruption 2989 * and buffer overrun. 2990 * 2991 * Always setting nbytes to even number solves this problem 2992 * because then ATAPI devices don't have to split data at 2n 2993 * boundaries. 2994 */ 2995 if (nbytes & 0x1) 2996 nbytes++; 2997 2998 qc->tf.lbam = (nbytes & 0xFF); 2999 qc->tf.lbah = (nbytes >> 8); 3000 3001 if (nodata) 3002 qc->tf.protocol = ATAPI_PROT_NODATA; 3003 else if (using_pio) 3004 qc->tf.protocol = ATAPI_PROT_PIO; 3005 else { 3006 /* DMA data xfer */ 3007 qc->tf.protocol = ATAPI_PROT_DMA; 3008 qc->tf.feature |= ATAPI_PKT_DMA; 3009 3010 if ((dev->flags & ATA_DFLAG_DMADIR) && 3011 (scmd->sc_data_direction != DMA_TO_DEVICE)) 3012 /* some SATA bridges need us to indicate data xfer direction */ 3013 qc->tf.feature |= ATAPI_DMADIR; 3014 } 3015 3016 3017 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 3018 as ATAPI tape drives don't get this right otherwise */ 3019 return 0; 3020 } 3021 3022 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 3023 { 3024 /* 3025 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 3026 * or 2 (IDE master + slave case). However, the former case includes 3027 * libsas hosted devices which are numbered per scsi host, leading 3028 * to devno potentially being larger than 0 but with each struct 3029 * ata_device having its own struct ata_port and struct ata_link. 3030 * To accommodate these, ignore devno and always use device number 0. 3031 */ 3032 if (likely(!sata_pmp_attached(ap))) { 3033 int link_max_devices = ata_link_max_devices(&ap->link); 3034 3035 if (link_max_devices == 1) 3036 return &ap->link.device[0]; 3037 3038 if (devno < link_max_devices) 3039 return &ap->link.device[devno]; 3040 3041 return NULL; 3042 } 3043 3044 /* 3045 * For PMP-attached devices, the device number corresponds to C 3046 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 3047 * for the device. 3048 */ 3049 if (devno < ap->nr_pmp_links) 3050 return &ap->pmp_link[devno].device[0]; 3051 3052 return NULL; 3053 } 3054 3055 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 3056 const struct scsi_device *scsidev) 3057 { 3058 int devno; 3059 3060 /* skip commands not addressed to targets we simulate */ 3061 if (!sata_pmp_attached(ap)) { 3062 if (unlikely(scsidev->channel || scsidev->lun)) 3063 return NULL; 3064 devno = scsidev->id; 3065 } else { 3066 if (unlikely(scsidev->id || scsidev->lun)) 3067 return NULL; 3068 devno = scsidev->channel; 3069 } 3070 3071 return ata_find_dev(ap, devno); 3072 } 3073 3074 /** 3075 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3076 * @ap: ATA port to which the device is attached 3077 * @scsidev: SCSI device from which we derive the ATA device 3078 * 3079 * Given various information provided in struct scsi_cmnd, 3080 * map that onto an ATA bus, and using that mapping 3081 * determine which ata_device is associated with the 3082 * SCSI command to be sent. 3083 * 3084 * LOCKING: 3085 * spin_lock_irqsave(host lock) 3086 * 3087 * RETURNS: 3088 * Associated ATA device, or %NULL if not found. 3089 */ 3090 struct ata_device * 3091 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3092 { 3093 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3094 3095 if (!ata_adapter_is_online(ap)) 3096 return NULL; 3097 3098 if (unlikely(!dev || !ata_dev_enabled(dev))) 3099 return NULL; 3100 3101 return dev; 3102 } 3103 3104 /* 3105 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3106 * @byte1: Byte 1 from pass-thru CDB. 3107 * 3108 * RETURNS: 3109 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3110 */ 3111 static u8 3112 ata_scsi_map_proto(u8 byte1) 3113 { 3114 switch((byte1 & 0x1e) >> 1) { 3115 case 3: /* Non-data */ 3116 return ATA_PROT_NODATA; 3117 3118 case 6: /* DMA */ 3119 case 10: /* UDMA Data-in */ 3120 case 11: /* UDMA Data-Out */ 3121 return ATA_PROT_DMA; 3122 3123 case 4: /* PIO Data-in */ 3124 case 5: /* PIO Data-out */ 3125 return ATA_PROT_PIO; 3126 3127 case 12: /* FPDMA */ 3128 return ATA_PROT_NCQ; 3129 3130 case 0: /* Hard Reset */ 3131 case 1: /* SRST */ 3132 case 8: /* Device Diagnostic */ 3133 case 9: /* Device Reset */ 3134 case 7: /* DMA Queued */ 3135 case 15: /* Return Response Info */ 3136 default: /* Reserved */ 3137 break; 3138 } 3139 3140 return ATA_PROT_UNKNOWN; 3141 } 3142 3143 /** 3144 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3145 * @qc: command structure to be initialized 3146 * 3147 * Handles either 12, 16, or 32-byte versions of the CDB. 3148 * 3149 * RETURNS: 3150 * Zero on success, non-zero on failure. 3151 */ 3152 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3153 { 3154 struct ata_taskfile *tf = &(qc->tf); 3155 struct scsi_cmnd *scmd = qc->scsicmd; 3156 struct ata_device *dev = qc->dev; 3157 const u8 *cdb = scmd->cmnd; 3158 u16 fp; 3159 u16 cdb_offset = 0; 3160 3161 /* 7Fh variable length cmd means a ata pass-thru(32) */ 3162 if (cdb[0] == VARIABLE_LENGTH_CMD) 3163 cdb_offset = 9; 3164 3165 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 3166 if (tf->protocol == ATA_PROT_UNKNOWN) { 3167 fp = 1; 3168 goto invalid_fld; 3169 } 3170 3171 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 3172 /* 3173 * When T_LENGTH is zero (No data is transferred), dir should 3174 * be DMA_NONE. 3175 */ 3176 if (scmd->sc_data_direction != DMA_NONE) { 3177 fp = 2 + cdb_offset; 3178 goto invalid_fld; 3179 } 3180 3181 if (ata_is_ncq(tf->protocol)) 3182 tf->protocol = ATA_PROT_NCQ_NODATA; 3183 } 3184 3185 /* enable LBA */ 3186 tf->flags |= ATA_TFLAG_LBA; 3187 3188 /* 3189 * 12 and 16 byte CDBs use different offsets to 3190 * provide the various register values. 3191 */ 3192 switch (cdb[0]) { 3193 case ATA_16: 3194 /* 3195 * 16-byte CDB - may contain extended commands. 3196 * 3197 * If that is the case, copy the upper byte register values. 3198 */ 3199 if (cdb[1] & 0x01) { 3200 tf->hob_feature = cdb[3]; 3201 tf->hob_nsect = cdb[5]; 3202 tf->hob_lbal = cdb[7]; 3203 tf->hob_lbam = cdb[9]; 3204 tf->hob_lbah = cdb[11]; 3205 tf->flags |= ATA_TFLAG_LBA48; 3206 } else 3207 tf->flags &= ~ATA_TFLAG_LBA48; 3208 3209 /* 3210 * Always copy low byte, device and command registers. 3211 */ 3212 tf->feature = cdb[4]; 3213 tf->nsect = cdb[6]; 3214 tf->lbal = cdb[8]; 3215 tf->lbam = cdb[10]; 3216 tf->lbah = cdb[12]; 3217 tf->device = cdb[13]; 3218 tf->command = cdb[14]; 3219 break; 3220 case ATA_12: 3221 /* 3222 * 12-byte CDB - incapable of extended commands. 3223 */ 3224 tf->flags &= ~ATA_TFLAG_LBA48; 3225 3226 tf->feature = cdb[3]; 3227 tf->nsect = cdb[4]; 3228 tf->lbal = cdb[5]; 3229 tf->lbam = cdb[6]; 3230 tf->lbah = cdb[7]; 3231 tf->device = cdb[8]; 3232 tf->command = cdb[9]; 3233 break; 3234 default: 3235 /* 3236 * 32-byte CDB - may contain extended command fields. 3237 * 3238 * If that is the case, copy the upper byte register values. 3239 */ 3240 if (cdb[10] & 0x01) { 3241 tf->hob_feature = cdb[20]; 3242 tf->hob_nsect = cdb[22]; 3243 tf->hob_lbal = cdb[16]; 3244 tf->hob_lbam = cdb[15]; 3245 tf->hob_lbah = cdb[14]; 3246 tf->flags |= ATA_TFLAG_LBA48; 3247 } else 3248 tf->flags &= ~ATA_TFLAG_LBA48; 3249 3250 tf->feature = cdb[21]; 3251 tf->nsect = cdb[23]; 3252 tf->lbal = cdb[19]; 3253 tf->lbam = cdb[18]; 3254 tf->lbah = cdb[17]; 3255 tf->device = cdb[24]; 3256 tf->command = cdb[25]; 3257 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3258 break; 3259 } 3260 3261 /* For NCQ commands copy the tag value */ 3262 if (ata_is_ncq(tf->protocol)) 3263 tf->nsect = qc->hw_tag << 3; 3264 3265 /* enforce correct master/slave bit */ 3266 tf->device = dev->devno ? 3267 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3268 3269 switch (tf->command) { 3270 /* READ/WRITE LONG use a non-standard sect_size */ 3271 case ATA_CMD_READ_LONG: 3272 case ATA_CMD_READ_LONG_ONCE: 3273 case ATA_CMD_WRITE_LONG: 3274 case ATA_CMD_WRITE_LONG_ONCE: 3275 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3276 fp = 1; 3277 goto invalid_fld; 3278 } 3279 qc->sect_size = scsi_bufflen(scmd); 3280 break; 3281 3282 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3283 case ATA_CMD_CFA_WRITE_NE: 3284 case ATA_CMD_CFA_TRANS_SECT: 3285 case ATA_CMD_CFA_WRITE_MULT_NE: 3286 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3287 case ATA_CMD_READ: 3288 case ATA_CMD_READ_EXT: 3289 case ATA_CMD_READ_QUEUED: 3290 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3291 case ATA_CMD_FPDMA_READ: 3292 case ATA_CMD_READ_MULTI: 3293 case ATA_CMD_READ_MULTI_EXT: 3294 case ATA_CMD_PIO_READ: 3295 case ATA_CMD_PIO_READ_EXT: 3296 case ATA_CMD_READ_STREAM_DMA_EXT: 3297 case ATA_CMD_READ_STREAM_EXT: 3298 case ATA_CMD_VERIFY: 3299 case ATA_CMD_VERIFY_EXT: 3300 case ATA_CMD_WRITE: 3301 case ATA_CMD_WRITE_EXT: 3302 case ATA_CMD_WRITE_FUA_EXT: 3303 case ATA_CMD_WRITE_QUEUED: 3304 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3305 case ATA_CMD_FPDMA_WRITE: 3306 case ATA_CMD_WRITE_MULTI: 3307 case ATA_CMD_WRITE_MULTI_EXT: 3308 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3309 case ATA_CMD_PIO_WRITE: 3310 case ATA_CMD_PIO_WRITE_EXT: 3311 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3312 case ATA_CMD_WRITE_STREAM_EXT: 3313 qc->sect_size = scmd->device->sector_size; 3314 break; 3315 3316 /* Everything else uses 512 byte "sectors" */ 3317 default: 3318 qc->sect_size = ATA_SECT_SIZE; 3319 } 3320 3321 /* 3322 * Set flags so that all registers will be written, pass on 3323 * write indication (used for PIO/DMA setup), result TF is 3324 * copied back and we don't whine too much about its failure. 3325 */ 3326 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3327 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3328 tf->flags |= ATA_TFLAG_WRITE; 3329 3330 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3331 3332 /* 3333 * Set transfer length. 3334 * 3335 * TODO: find out if we need to do more here to 3336 * cover scatter/gather case. 3337 */ 3338 ata_qc_set_pc_nbytes(qc); 3339 3340 /* We may not issue DMA commands if no DMA mode is set */ 3341 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3342 fp = 1; 3343 goto invalid_fld; 3344 } 3345 3346 /* We may not issue NCQ commands to devices not supporting NCQ */ 3347 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3348 fp = 1; 3349 goto invalid_fld; 3350 } 3351 3352 /* sanity check for pio multi commands */ 3353 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3354 fp = 1; 3355 goto invalid_fld; 3356 } 3357 3358 if (is_multi_taskfile(tf)) { 3359 unsigned int multi_count = 1 << (cdb[1] >> 5); 3360 3361 /* compare the passed through multi_count 3362 * with the cached multi_count of libata 3363 */ 3364 if (multi_count != dev->multi_count) 3365 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3366 multi_count); 3367 } 3368 3369 /* 3370 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3371 * SET_FEATURES - XFER MODE must be preceded/succeeded 3372 * by an update to hardware-specific registers for each 3373 * controller (i.e. the reason for ->set_piomode(), 3374 * ->set_dmamode(), and ->post_set_mode() hooks). 3375 */ 3376 if (tf->command == ATA_CMD_SET_FEATURES && 3377 tf->feature == SETFEATURES_XFER) { 3378 fp = (cdb[0] == ATA_16) ? 4 : 3; 3379 goto invalid_fld; 3380 } 3381 3382 /* 3383 * Filter TPM commands by default. These provide an 3384 * essentially uncontrolled encrypted "back door" between 3385 * applications and the disk. Set libata.allow_tpm=1 if you 3386 * have a real reason for wanting to use them. This ensures 3387 * that installed software cannot easily mess stuff up without 3388 * user intent. DVR type users will probably ship with this enabled 3389 * for movie content management. 3390 * 3391 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3392 * for this and should do in future but that it is not sufficient as 3393 * DCS is an optional feature set. Thus we also do the software filter 3394 * so that we comply with the TC consortium stated goal that the user 3395 * can turn off TC features of their system. 3396 */ 3397 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3398 fp = (cdb[0] == ATA_16) ? 14 : 9; 3399 goto invalid_fld; 3400 } 3401 3402 return 0; 3403 3404 invalid_fld: 3405 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3406 return 1; 3407 } 3408 3409 /** 3410 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3411 * @cmd: SCSI command being translated 3412 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3413 * @sector: Starting sector 3414 * @count: Total Range of request in logical sectors 3415 * 3416 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3417 * descriptor. 3418 * 3419 * Upto 64 entries of the format: 3420 * 63:48 Range Length 3421 * 47:0 LBA 3422 * 3423 * Range Length of 0 is ignored. 3424 * LBA's should be sorted order and not overlap. 3425 * 3426 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3427 * 3428 * Return: Number of bytes copied into sglist. 3429 */ 3430 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3431 u64 sector, u32 count) 3432 { 3433 struct scsi_device *sdp = cmd->device; 3434 size_t len = sdp->sector_size; 3435 size_t r; 3436 __le64 *buf; 3437 u32 i = 0; 3438 unsigned long flags; 3439 3440 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3441 3442 if (len > ATA_SCSI_RBUF_SIZE) 3443 len = ATA_SCSI_RBUF_SIZE; 3444 3445 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3446 buf = ((void *)ata_scsi_rbuf); 3447 memset(buf, 0, len); 3448 while (i < trmax) { 3449 u64 entry = sector | 3450 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3451 buf[i++] = __cpu_to_le64(entry); 3452 if (count <= 0xffff) 3453 break; 3454 count -= 0xffff; 3455 sector += 0xffff; 3456 } 3457 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3458 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3459 3460 return r; 3461 } 3462 3463 /** 3464 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3465 * @qc: Command to be translated 3466 * 3467 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3468 * an SCT Write Same command. 3469 * Based on WRITE SAME has the UNMAP flag: 3470 * 3471 * - When set translate to DSM TRIM 3472 * - When clear translate to SCT Write Same 3473 */ 3474 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3475 { 3476 struct ata_taskfile *tf = &qc->tf; 3477 struct scsi_cmnd *scmd = qc->scsicmd; 3478 struct scsi_device *sdp = scmd->device; 3479 size_t len = sdp->sector_size; 3480 struct ata_device *dev = qc->dev; 3481 const u8 *cdb = scmd->cmnd; 3482 u64 block; 3483 u32 n_block; 3484 const u32 trmax = len >> 3; 3485 u32 size; 3486 u16 fp; 3487 u8 bp = 0xff; 3488 u8 unmap = cdb[1] & 0x8; 3489 3490 /* we may not issue DMA commands if no DMA mode is set */ 3491 if (unlikely(!ata_dma_enabled(dev))) 3492 goto invalid_opcode; 3493 3494 /* 3495 * We only allow sending this command through the block layer, 3496 * as it modifies the DATA OUT buffer, which would corrupt user 3497 * memory for SG_IO commands. 3498 */ 3499 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3500 goto invalid_opcode; 3501 3502 if (unlikely(scmd->cmd_len < 16)) { 3503 fp = 15; 3504 goto invalid_fld; 3505 } 3506 scsi_16_lba_len(cdb, &block, &n_block); 3507 3508 if (!unmap || (dev->quirks & ATA_QUIRK_NOTRIM) || 3509 !ata_id_has_trim(dev->id)) { 3510 fp = 1; 3511 bp = 3; 3512 goto invalid_fld; 3513 } 3514 /* If the request is too large the cmd is invalid */ 3515 if (n_block > 0xffff * trmax) { 3516 fp = 2; 3517 goto invalid_fld; 3518 } 3519 3520 /* 3521 * WRITE SAME always has a sector sized buffer as payload, this 3522 * should never be a multiple entry S/G list. 3523 */ 3524 if (!scsi_sg_count(scmd)) 3525 goto invalid_param_len; 3526 3527 /* 3528 * size must match sector size in bytes 3529 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3530 * is defined as number of 512 byte blocks to be transferred. 3531 */ 3532 3533 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3534 if (size != len) 3535 goto invalid_param_len; 3536 3537 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3538 /* Newer devices support queued TRIM commands */ 3539 tf->protocol = ATA_PROT_NCQ; 3540 tf->command = ATA_CMD_FPDMA_SEND; 3541 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3542 tf->nsect = qc->hw_tag << 3; 3543 tf->hob_feature = (size / 512) >> 8; 3544 tf->feature = size / 512; 3545 3546 tf->auxiliary = 1; 3547 } else { 3548 tf->protocol = ATA_PROT_DMA; 3549 tf->hob_feature = 0; 3550 tf->feature = ATA_DSM_TRIM; 3551 tf->hob_nsect = (size / 512) >> 8; 3552 tf->nsect = size / 512; 3553 tf->command = ATA_CMD_DSM; 3554 } 3555 3556 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3557 ATA_TFLAG_WRITE; 3558 3559 ata_qc_set_pc_nbytes(qc); 3560 3561 return 0; 3562 3563 invalid_fld: 3564 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3565 return 1; 3566 invalid_param_len: 3567 /* "Parameter list length error" */ 3568 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3569 return 1; 3570 invalid_opcode: 3571 /* "Invalid command operation code" */ 3572 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3573 return 1; 3574 } 3575 3576 static unsigned int ata_scsi_report_supported_opcodes(struct ata_device *dev, 3577 struct scsi_cmnd *cmd, 3578 u8 *rbuf) 3579 { 3580 u8 *cdb = cmd->cmnd; 3581 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3582 3583 if (cdb[2] != 1 && cdb[2] != 3) { 3584 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3585 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 3586 return 0; 3587 } 3588 3589 switch (cdb[3]) { 3590 case INQUIRY: 3591 case MODE_SENSE: 3592 case MODE_SENSE_10: 3593 case READ_CAPACITY: 3594 case SERVICE_ACTION_IN_16: 3595 case REPORT_LUNS: 3596 case REQUEST_SENSE: 3597 case SYNCHRONIZE_CACHE: 3598 case SYNCHRONIZE_CACHE_16: 3599 case REZERO_UNIT: 3600 case SEEK_6: 3601 case SEEK_10: 3602 case TEST_UNIT_READY: 3603 case SEND_DIAGNOSTIC: 3604 case MAINTENANCE_IN: 3605 case READ_6: 3606 case READ_10: 3607 case WRITE_6: 3608 case WRITE_10: 3609 case ATA_12: 3610 case ATA_16: 3611 case VERIFY: 3612 case VERIFY_16: 3613 case MODE_SELECT: 3614 case MODE_SELECT_10: 3615 case START_STOP: 3616 supported = 3; 3617 break; 3618 case READ_16: 3619 supported = 3; 3620 if (dev->flags & ATA_DFLAG_CDL) { 3621 /* 3622 * CDL read descriptors map to the T2A page, that is, 3623 * rwcdlp = 0x01 and cdlp = 0x01 3624 */ 3625 rwcdlp = 0x01; 3626 cdlp = 0x01 << 3; 3627 } 3628 break; 3629 case WRITE_16: 3630 supported = 3; 3631 if (dev->flags & ATA_DFLAG_CDL) { 3632 /* 3633 * CDL write descriptors map to the T2B page, that is, 3634 * rwcdlp = 0x01 and cdlp = 0x02 3635 */ 3636 rwcdlp = 0x01; 3637 cdlp = 0x02 << 3; 3638 } 3639 break; 3640 case ZBC_IN: 3641 case ZBC_OUT: 3642 if (ata_id_zoned_cap(dev->id) || 3643 dev->class == ATA_DEV_ZAC) 3644 supported = 3; 3645 break; 3646 case SECURITY_PROTOCOL_IN: 3647 case SECURITY_PROTOCOL_OUT: 3648 if (dev->flags & ATA_DFLAG_TRUSTED) 3649 supported = 3; 3650 break; 3651 default: 3652 break; 3653 } 3654 3655 /* One command format */ 3656 rbuf[0] = rwcdlp; 3657 rbuf[1] = cdlp | supported; 3658 3659 return 4; 3660 } 3661 3662 /** 3663 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3664 * @dev: Target device. 3665 * @cmd: SCSI command of interest. 3666 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3667 * 3668 * Yields a subset to satisfy scsi_report_opcode() 3669 * 3670 * LOCKING: 3671 * spin_lock_irqsave(host lock) 3672 */ 3673 static unsigned int ata_scsiop_maint_in(struct ata_device *dev, 3674 struct scsi_cmnd *cmd, u8 *rbuf) 3675 { 3676 u8 *cdb = cmd->cmnd; 3677 u8 service_action = cdb[1] & 0x1f; 3678 3679 switch (service_action) { 3680 case MI_REPORT_SUPPORTED_OPERATION_CODES: 3681 return ata_scsi_report_supported_opcodes(dev, cmd, rbuf); 3682 default: 3683 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 3684 return 0; 3685 } 3686 } 3687 3688 /** 3689 * ata_scsi_report_zones_complete - convert ATA output 3690 * @qc: command structure returning the data 3691 * 3692 * Convert T-13 little-endian field representation into 3693 * T-10 big-endian field representation. 3694 * What a mess. 3695 */ 3696 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3697 { 3698 struct scsi_cmnd *scmd = qc->scsicmd; 3699 struct sg_mapping_iter miter; 3700 unsigned int bytes = 0; 3701 3702 lockdep_assert_held(qc->ap->lock); 3703 3704 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3705 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3706 3707 while (sg_miter_next(&miter)) { 3708 unsigned int offset = 0; 3709 3710 if (bytes == 0) { 3711 char *hdr; 3712 u32 list_length; 3713 u64 max_lba, opt_lba; 3714 u16 same; 3715 3716 /* Swizzle header */ 3717 hdr = miter.addr; 3718 list_length = get_unaligned_le32(&hdr[0]); 3719 same = get_unaligned_le16(&hdr[4]); 3720 max_lba = get_unaligned_le64(&hdr[8]); 3721 opt_lba = get_unaligned_le64(&hdr[16]); 3722 put_unaligned_be32(list_length, &hdr[0]); 3723 hdr[4] = same & 0xf; 3724 put_unaligned_be64(max_lba, &hdr[8]); 3725 put_unaligned_be64(opt_lba, &hdr[16]); 3726 offset += 64; 3727 bytes += 64; 3728 } 3729 while (offset < miter.length) { 3730 char *rec; 3731 u8 cond, type, non_seq, reset; 3732 u64 size, start, wp; 3733 3734 /* Swizzle zone descriptor */ 3735 rec = miter.addr + offset; 3736 type = rec[0] & 0xf; 3737 cond = (rec[1] >> 4) & 0xf; 3738 non_seq = (rec[1] & 2); 3739 reset = (rec[1] & 1); 3740 size = get_unaligned_le64(&rec[8]); 3741 start = get_unaligned_le64(&rec[16]); 3742 wp = get_unaligned_le64(&rec[24]); 3743 rec[0] = type; 3744 rec[1] = (cond << 4) | non_seq | reset; 3745 put_unaligned_be64(size, &rec[8]); 3746 put_unaligned_be64(start, &rec[16]); 3747 put_unaligned_be64(wp, &rec[24]); 3748 WARN_ON(offset + 64 > miter.length); 3749 offset += 64; 3750 bytes += 64; 3751 } 3752 } 3753 sg_miter_stop(&miter); 3754 3755 ata_scsi_qc_complete(qc); 3756 } 3757 3758 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3759 { 3760 struct ata_taskfile *tf = &qc->tf; 3761 struct scsi_cmnd *scmd = qc->scsicmd; 3762 const u8 *cdb = scmd->cmnd; 3763 u16 sect, fp = (u16)-1; 3764 u8 sa, options, bp = 0xff; 3765 u64 block; 3766 u32 n_block; 3767 3768 if (unlikely(scmd->cmd_len < 16)) { 3769 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3770 scmd->cmd_len); 3771 fp = 15; 3772 goto invalid_fld; 3773 } 3774 scsi_16_lba_len(cdb, &block, &n_block); 3775 if (n_block != scsi_bufflen(scmd)) { 3776 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3777 n_block, scsi_bufflen(scmd)); 3778 goto invalid_param_len; 3779 } 3780 sa = cdb[1] & 0x1f; 3781 if (sa != ZI_REPORT_ZONES) { 3782 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3783 fp = 1; 3784 goto invalid_fld; 3785 } 3786 /* 3787 * ZAC allows only for transfers in 512 byte blocks, 3788 * and uses a 16 bit value for the transfer count. 3789 */ 3790 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3791 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3792 goto invalid_param_len; 3793 } 3794 sect = n_block / 512; 3795 options = cdb[14] & 0xbf; 3796 3797 if (ata_ncq_enabled(qc->dev) && 3798 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3799 tf->protocol = ATA_PROT_NCQ; 3800 tf->command = ATA_CMD_FPDMA_RECV; 3801 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3802 tf->nsect = qc->hw_tag << 3; 3803 tf->feature = sect & 0xff; 3804 tf->hob_feature = (sect >> 8) & 0xff; 3805 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3806 } else { 3807 tf->command = ATA_CMD_ZAC_MGMT_IN; 3808 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3809 tf->protocol = ATA_PROT_DMA; 3810 tf->hob_feature = options; 3811 tf->hob_nsect = (sect >> 8) & 0xff; 3812 tf->nsect = sect & 0xff; 3813 } 3814 tf->device = ATA_LBA; 3815 tf->lbah = (block >> 16) & 0xff; 3816 tf->lbam = (block >> 8) & 0xff; 3817 tf->lbal = block & 0xff; 3818 tf->hob_lbah = (block >> 40) & 0xff; 3819 tf->hob_lbam = (block >> 32) & 0xff; 3820 tf->hob_lbal = (block >> 24) & 0xff; 3821 3822 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3823 qc->flags |= ATA_QCFLAG_RESULT_TF; 3824 3825 ata_qc_set_pc_nbytes(qc); 3826 3827 qc->complete_fn = ata_scsi_report_zones_complete; 3828 3829 return 0; 3830 3831 invalid_fld: 3832 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3833 return 1; 3834 3835 invalid_param_len: 3836 /* "Parameter list length error" */ 3837 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3838 return 1; 3839 } 3840 3841 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3842 { 3843 struct ata_taskfile *tf = &qc->tf; 3844 struct scsi_cmnd *scmd = qc->scsicmd; 3845 struct ata_device *dev = qc->dev; 3846 const u8 *cdb = scmd->cmnd; 3847 u8 all, sa; 3848 u64 block; 3849 u32 n_block; 3850 u16 fp = (u16)-1; 3851 3852 if (unlikely(scmd->cmd_len < 16)) { 3853 fp = 15; 3854 goto invalid_fld; 3855 } 3856 3857 sa = cdb[1] & 0x1f; 3858 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3859 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3860 fp = 1; 3861 goto invalid_fld; 3862 } 3863 3864 scsi_16_lba_len(cdb, &block, &n_block); 3865 if (n_block) { 3866 /* 3867 * ZAC MANAGEMENT OUT doesn't define any length 3868 */ 3869 goto invalid_param_len; 3870 } 3871 3872 all = cdb[14] & 0x1; 3873 if (all) { 3874 /* 3875 * Ignore the block address (zone ID) as defined by ZBC. 3876 */ 3877 block = 0; 3878 } else if (block >= dev->n_sectors) { 3879 /* 3880 * Block must be a valid zone ID (a zone start LBA). 3881 */ 3882 fp = 2; 3883 goto invalid_fld; 3884 } 3885 3886 if (ata_ncq_enabled(qc->dev) && 3887 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3888 tf->protocol = ATA_PROT_NCQ_NODATA; 3889 tf->command = ATA_CMD_NCQ_NON_DATA; 3890 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3891 tf->nsect = qc->hw_tag << 3; 3892 tf->auxiliary = sa | ((u16)all << 8); 3893 } else { 3894 tf->protocol = ATA_PROT_NODATA; 3895 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3896 tf->feature = sa; 3897 tf->hob_feature = all; 3898 } 3899 tf->lbah = (block >> 16) & 0xff; 3900 tf->lbam = (block >> 8) & 0xff; 3901 tf->lbal = block & 0xff; 3902 tf->hob_lbah = (block >> 40) & 0xff; 3903 tf->hob_lbam = (block >> 32) & 0xff; 3904 tf->hob_lbal = (block >> 24) & 0xff; 3905 tf->device = ATA_LBA; 3906 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3907 3908 return 0; 3909 3910 invalid_fld: 3911 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3912 return 1; 3913 invalid_param_len: 3914 /* "Parameter list length error" */ 3915 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3916 return 1; 3917 } 3918 3919 /** 3920 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3921 * @qc: Storage for translated ATA taskfile 3922 * @buf: input buffer 3923 * @len: number of valid bytes in the input buffer 3924 * @fp: out parameter for the failed field on error 3925 * 3926 * Prepare a taskfile to modify caching information for the device. 3927 * 3928 * LOCKING: 3929 * None. 3930 */ 3931 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3932 const u8 *buf, int len, u16 *fp) 3933 { 3934 struct ata_taskfile *tf = &qc->tf; 3935 struct ata_device *dev = qc->dev; 3936 u8 mpage[CACHE_MPAGE_LEN]; 3937 u8 wce; 3938 int i; 3939 3940 /* 3941 * The first two bytes of def_cache_mpage are a header, so offsets 3942 * in mpage are off by 2 compared to buf. Same for len. 3943 */ 3944 3945 if (len != CACHE_MPAGE_LEN - 2) { 3946 *fp = min(len, CACHE_MPAGE_LEN - 2); 3947 return -EINVAL; 3948 } 3949 3950 wce = buf[0] & (1 << 2); 3951 3952 /* 3953 * Check that read-only bits are not modified. 3954 */ 3955 ata_msense_caching(dev->id, mpage, false); 3956 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3957 if (i == 0) 3958 continue; 3959 if (mpage[i + 2] != buf[i]) { 3960 *fp = i; 3961 return -EINVAL; 3962 } 3963 } 3964 3965 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3966 tf->protocol = ATA_PROT_NODATA; 3967 tf->nsect = 0; 3968 tf->command = ATA_CMD_SET_FEATURES; 3969 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3970 return 0; 3971 } 3972 3973 /* 3974 * Simulate MODE SELECT control mode page, sub-page 0. 3975 */ 3976 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3977 const u8 *buf, int len, u16 *fp) 3978 { 3979 struct ata_device *dev = qc->dev; 3980 u8 mpage[CONTROL_MPAGE_LEN]; 3981 u8 d_sense; 3982 int i; 3983 3984 /* 3985 * The first two bytes of def_control_mpage are a header, so offsets 3986 * in mpage are off by 2 compared to buf. Same for len. 3987 */ 3988 3989 if (len != CONTROL_MPAGE_LEN - 2) { 3990 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3991 return -EINVAL; 3992 } 3993 3994 d_sense = buf[0] & (1 << 2); 3995 3996 /* 3997 * Check that read-only bits are not modified. 3998 */ 3999 ata_msense_control_spg0(dev, mpage, false); 4000 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 4001 if (i == 0) 4002 continue; 4003 if (mpage[2 + i] != buf[i]) { 4004 *fp = i; 4005 return -EINVAL; 4006 } 4007 } 4008 if (d_sense & (1 << 2)) 4009 dev->flags |= ATA_DFLAG_D_SENSE; 4010 else 4011 dev->flags &= ~ATA_DFLAG_D_SENSE; 4012 return 0; 4013 } 4014 4015 /* 4016 * Translate MODE SELECT control mode page, sub-page f2h (ATA feature mode 4017 * page) into a SET FEATURES command. 4018 */ 4019 static int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 4020 const u8 *buf, int len, u16 *fp) 4021 { 4022 struct ata_device *dev = qc->dev; 4023 struct ata_taskfile *tf = &qc->tf; 4024 u8 cdl_action; 4025 4026 /* 4027 * The first four bytes of ATA Feature Control mode page are a header, 4028 * so offsets in mpage are off by 4 compared to buf. Same for len. 4029 */ 4030 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 4031 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 4032 return -EINVAL; 4033 } 4034 4035 /* Check cdl_ctrl */ 4036 switch (buf[0] & 0x03) { 4037 case 0: 4038 /* Disable CDL */ 4039 ata_dev_dbg(dev, "Disabling CDL\n"); 4040 cdl_action = 0; 4041 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 4042 break; 4043 case 0x02: 4044 /* 4045 * Enable CDL. Since CDL is mutually exclusive with NCQ 4046 * priority, allow this only if NCQ priority is disabled. 4047 */ 4048 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 4049 ata_dev_err(dev, 4050 "NCQ priority must be disabled to enable CDL\n"); 4051 return -EINVAL; 4052 } 4053 ata_dev_dbg(dev, "Enabling CDL\n"); 4054 cdl_action = 1; 4055 dev->flags |= ATA_DFLAG_CDL_ENABLED; 4056 break; 4057 default: 4058 *fp = 0; 4059 return -EINVAL; 4060 } 4061 4062 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 4063 tf->protocol = ATA_PROT_NODATA; 4064 tf->command = ATA_CMD_SET_FEATURES; 4065 tf->feature = SETFEATURES_CDL; 4066 tf->nsect = cdl_action; 4067 4068 return 1; 4069 } 4070 4071 /** 4072 * ata_mselect_control - Simulate MODE SELECT for control page 4073 * @qc: Storage for translated ATA taskfile 4074 * @spg: target sub-page of the control page 4075 * @buf: input buffer 4076 * @len: number of valid bytes in the input buffer 4077 * @fp: out parameter for the failed field on error 4078 * 4079 * Prepare a taskfile to modify caching information for the device. 4080 * 4081 * LOCKING: 4082 * None. 4083 */ 4084 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 4085 const u8 *buf, int len, u16 *fp) 4086 { 4087 switch (spg) { 4088 case 0: 4089 return ata_mselect_control_spg0(qc, buf, len, fp); 4090 case ATA_FEATURE_SUB_MPAGE: 4091 return ata_mselect_control_ata_feature(qc, buf, len, fp); 4092 default: 4093 return -EINVAL; 4094 } 4095 } 4096 4097 /** 4098 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 4099 * @qc: Storage for translated ATA taskfile 4100 * 4101 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 4102 * Assume this is invoked for direct access devices (e.g. disks) only. 4103 * There should be no block descriptor for other device types. 4104 * 4105 * LOCKING: 4106 * spin_lock_irqsave(host lock) 4107 */ 4108 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 4109 { 4110 struct scsi_cmnd *scmd = qc->scsicmd; 4111 const u8 *cdb = scmd->cmnd; 4112 u8 pg, spg; 4113 unsigned six_byte, pg_len, hdr_len, bd_len; 4114 int len, ret; 4115 u16 fp = (u16)-1; 4116 u8 bp = 0xff; 4117 u8 buffer[64]; 4118 const u8 *p = buffer; 4119 4120 six_byte = (cdb[0] == MODE_SELECT); 4121 if (six_byte) { 4122 if (scmd->cmd_len < 5) { 4123 fp = 4; 4124 goto invalid_fld; 4125 } 4126 4127 len = cdb[4]; 4128 hdr_len = 4; 4129 } else { 4130 if (scmd->cmd_len < 9) { 4131 fp = 8; 4132 goto invalid_fld; 4133 } 4134 4135 len = get_unaligned_be16(&cdb[7]); 4136 hdr_len = 8; 4137 } 4138 4139 /* We only support PF=1, SP=0. */ 4140 if ((cdb[1] & 0x11) != 0x10) { 4141 fp = 1; 4142 bp = (cdb[1] & 0x01) ? 1 : 5; 4143 goto invalid_fld; 4144 } 4145 4146 /* Test early for possible overrun. */ 4147 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 4148 goto invalid_param_len; 4149 4150 /* Move past header and block descriptors. */ 4151 if (len < hdr_len) 4152 goto invalid_param_len; 4153 4154 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 4155 buffer, sizeof(buffer))) 4156 goto invalid_param_len; 4157 4158 if (six_byte) 4159 bd_len = p[3]; 4160 else 4161 bd_len = get_unaligned_be16(&p[6]); 4162 4163 len -= hdr_len; 4164 p += hdr_len; 4165 if (len < bd_len) 4166 goto invalid_param_len; 4167 if (bd_len != 0 && bd_len != 8) { 4168 fp = (six_byte) ? 3 : 6; 4169 fp += bd_len + hdr_len; 4170 goto invalid_param; 4171 } 4172 4173 len -= bd_len; 4174 p += bd_len; 4175 if (len == 0) 4176 goto skip; 4177 4178 /* Parse both possible formats for the mode page headers. */ 4179 pg = p[0] & 0x3f; 4180 if (p[0] & 0x40) { 4181 if (len < 4) 4182 goto invalid_param_len; 4183 4184 spg = p[1]; 4185 pg_len = get_unaligned_be16(&p[2]); 4186 p += 4; 4187 len -= 4; 4188 } else { 4189 if (len < 2) 4190 goto invalid_param_len; 4191 4192 spg = 0; 4193 pg_len = p[1]; 4194 p += 2; 4195 len -= 2; 4196 } 4197 4198 /* 4199 * Supported subpages: all subpages and ATA feature sub-page f2h of 4200 * the control page. 4201 */ 4202 if (spg) { 4203 switch (spg) { 4204 case ALL_SUB_MPAGES: 4205 /* All subpages is not supported for the control page */ 4206 if (pg == CONTROL_MPAGE) { 4207 fp = (p[0] & 0x40) ? 1 : 0; 4208 fp += hdr_len + bd_len; 4209 goto invalid_param; 4210 } 4211 break; 4212 case ATA_FEATURE_SUB_MPAGE: 4213 if (qc->dev->flags & ATA_DFLAG_CDL && 4214 pg == CONTROL_MPAGE) 4215 break; 4216 fallthrough; 4217 default: 4218 fp = (p[0] & 0x40) ? 1 : 0; 4219 fp += hdr_len + bd_len; 4220 goto invalid_param; 4221 } 4222 } 4223 if (pg_len > len) 4224 goto invalid_param_len; 4225 4226 switch (pg) { 4227 case CACHE_MPAGE: 4228 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4229 fp += hdr_len + bd_len; 4230 goto invalid_param; 4231 } 4232 break; 4233 case CONTROL_MPAGE: 4234 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 4235 if (ret < 0) { 4236 fp += hdr_len + bd_len; 4237 goto invalid_param; 4238 } 4239 if (!ret) 4240 goto skip; /* No ATA command to send */ 4241 break; 4242 default: 4243 /* Invalid page code */ 4244 fp = bd_len + hdr_len; 4245 goto invalid_param; 4246 } 4247 4248 /* 4249 * Only one page has changeable data, so we only support setting one 4250 * page at a time. 4251 */ 4252 if (len > pg_len) 4253 goto invalid_param; 4254 4255 return 0; 4256 4257 invalid_fld: 4258 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4259 return 1; 4260 4261 invalid_param: 4262 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4263 return 1; 4264 4265 invalid_param_len: 4266 /* "Parameter list length error" */ 4267 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4268 return 1; 4269 4270 skip: 4271 scmd->result = SAM_STAT_GOOD; 4272 return 1; 4273 } 4274 4275 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4276 { 4277 if (len == 0) 4278 return ATA_CMD_TRUSTED_NONDATA; 4279 else if (send) 4280 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4281 else 4282 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4283 } 4284 4285 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4286 { 4287 struct scsi_cmnd *scmd = qc->scsicmd; 4288 const u8 *cdb = scmd->cmnd; 4289 struct ata_taskfile *tf = &qc->tf; 4290 u8 secp = cdb[1]; 4291 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4292 u16 spsp = get_unaligned_be16(&cdb[2]); 4293 u32 len = get_unaligned_be32(&cdb[6]); 4294 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4295 4296 /* 4297 * We don't support the ATA "security" protocol. 4298 */ 4299 if (secp == 0xef) { 4300 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4301 return 1; 4302 } 4303 4304 if (cdb[4] & 7) { /* INC_512 */ 4305 if (len > 0xffff) { 4306 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4307 return 1; 4308 } 4309 } else { 4310 if (len > 0x01fffe00) { 4311 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4312 return 1; 4313 } 4314 4315 /* convert to the sector-based ATA addressing */ 4316 len = (len + 511) / 512; 4317 } 4318 4319 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4320 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4321 if (send) 4322 tf->flags |= ATA_TFLAG_WRITE; 4323 tf->command = ata_scsi_trusted_op(len, send, dma); 4324 tf->feature = secp; 4325 tf->lbam = spsp & 0xff; 4326 tf->lbah = spsp >> 8; 4327 4328 if (len) { 4329 tf->nsect = len & 0xff; 4330 tf->lbal = len >> 8; 4331 } else { 4332 if (!send) 4333 tf->lbah = (1 << 7); 4334 } 4335 4336 ata_qc_set_pc_nbytes(qc); 4337 return 0; 4338 } 4339 4340 /** 4341 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4342 * @qc: Command to be translated 4343 * 4344 * Translate a SCSI variable length CDB to specified commands. 4345 * It checks a service action value in CDB to call corresponding handler. 4346 * 4347 * RETURNS: 4348 * Zero on success, non-zero on failure 4349 * 4350 */ 4351 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4352 { 4353 struct scsi_cmnd *scmd = qc->scsicmd; 4354 const u8 *cdb = scmd->cmnd; 4355 const u16 sa = get_unaligned_be16(&cdb[8]); 4356 4357 /* 4358 * if service action represents a ata pass-thru(32) command, 4359 * then pass it to ata_scsi_pass_thru handler. 4360 */ 4361 if (sa == ATA_32) 4362 return ata_scsi_pass_thru(qc); 4363 4364 /* unsupported service action */ 4365 return 1; 4366 } 4367 4368 /** 4369 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4370 * @dev: ATA device 4371 * @cmd: SCSI command opcode to consider 4372 * 4373 * Look up the SCSI command given, and determine whether the 4374 * SCSI command is to be translated or simulated. 4375 * 4376 * RETURNS: 4377 * Pointer to translation function if possible, %NULL if not. 4378 */ 4379 4380 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4381 { 4382 switch (cmd) { 4383 case READ_6: 4384 case READ_10: 4385 case READ_16: 4386 4387 case WRITE_6: 4388 case WRITE_10: 4389 case WRITE_16: 4390 return ata_scsi_rw_xlat; 4391 4392 case WRITE_SAME_16: 4393 return ata_scsi_write_same_xlat; 4394 4395 case SYNCHRONIZE_CACHE: 4396 case SYNCHRONIZE_CACHE_16: 4397 if (ata_try_flush_cache(dev)) 4398 return ata_scsi_flush_xlat; 4399 break; 4400 4401 case VERIFY: 4402 case VERIFY_16: 4403 return ata_scsi_verify_xlat; 4404 4405 case ATA_12: 4406 case ATA_16: 4407 return ata_scsi_pass_thru; 4408 4409 case VARIABLE_LENGTH_CMD: 4410 return ata_scsi_var_len_cdb_xlat; 4411 4412 case MODE_SELECT: 4413 case MODE_SELECT_10: 4414 return ata_scsi_mode_select_xlat; 4415 4416 case ZBC_IN: 4417 return ata_scsi_zbc_in_xlat; 4418 4419 case ZBC_OUT: 4420 return ata_scsi_zbc_out_xlat; 4421 4422 case SECURITY_PROTOCOL_IN: 4423 case SECURITY_PROTOCOL_OUT: 4424 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4425 break; 4426 return ata_scsi_security_inout_xlat; 4427 4428 case START_STOP: 4429 return ata_scsi_start_stop_xlat; 4430 } 4431 4432 return NULL; 4433 } 4434 4435 /** 4436 * ata_scsi_simulate - simulate SCSI command on ATA device 4437 * @dev: the target device 4438 * @cmd: SCSI command being sent to device. 4439 * 4440 * Interprets and directly executes a select list of SCSI commands 4441 * that can be handled internally. 4442 * 4443 * LOCKING: 4444 * spin_lock_irqsave(host lock) 4445 */ 4446 static void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4447 { 4448 const u8 *scsicmd = cmd->cmnd; 4449 u8 tmp8; 4450 4451 switch (scsicmd[0]) { 4452 case INQUIRY: 4453 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_inquiry); 4454 break; 4455 4456 case MODE_SENSE: 4457 case MODE_SENSE_10: 4458 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_mode_sense); 4459 break; 4460 4461 case READ_CAPACITY: 4462 case SERVICE_ACTION_IN_16: 4463 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_read_cap); 4464 break; 4465 4466 case REPORT_LUNS: 4467 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_report_luns); 4468 break; 4469 4470 case REQUEST_SENSE: 4471 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4472 break; 4473 4474 /* if we reach this, then writeback caching is disabled, 4475 * turning this into a no-op. 4476 */ 4477 case SYNCHRONIZE_CACHE: 4478 case SYNCHRONIZE_CACHE_16: 4479 fallthrough; 4480 4481 /* no-op's, complete with success */ 4482 case REZERO_UNIT: 4483 case SEEK_6: 4484 case SEEK_10: 4485 case TEST_UNIT_READY: 4486 break; 4487 4488 case SEND_DIAGNOSTIC: 4489 tmp8 = scsicmd[1] & ~(1 << 3); 4490 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4491 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4492 break; 4493 4494 case MAINTENANCE_IN: 4495 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_maint_in); 4496 break; 4497 4498 /* all other commands */ 4499 default: 4500 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4501 /* "Invalid command operation code" */ 4502 break; 4503 } 4504 4505 scsi_done(cmd); 4506 } 4507 4508 enum scsi_qc_status __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 4509 struct ata_device *dev) 4510 { 4511 struct ata_port *ap = dev->link->ap; 4512 u8 scsi_op = scmd->cmnd[0]; 4513 ata_xlat_func_t xlat_func; 4514 4515 /* 4516 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4517 * However, this check is done without holding the ap->lock (a libata 4518 * specific lock), so we can have received an error irq since then, 4519 * therefore we must check if EH is pending or running, while holding 4520 * ap->lock. 4521 */ 4522 if (ata_port_eh_scheduled(ap)) 4523 return SCSI_MLQUEUE_DEVICE_BUSY; 4524 4525 if (unlikely(!scmd->cmd_len)) 4526 goto bad_cdb_len; 4527 4528 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4529 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4530 goto bad_cdb_len; 4531 4532 xlat_func = ata_get_xlat_func(dev, scsi_op); 4533 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4534 /* relay SCSI command to ATAPI device */ 4535 int len = COMMAND_SIZE(scsi_op); 4536 4537 if (unlikely(len > scmd->cmd_len || 4538 len > dev->cdb_len || 4539 scmd->cmd_len > ATAPI_CDB_LEN)) 4540 goto bad_cdb_len; 4541 4542 xlat_func = atapi_xlat; 4543 } else { 4544 /* ATA_16 passthru, treat as an ATA command */ 4545 if (unlikely(scmd->cmd_len > 16)) 4546 goto bad_cdb_len; 4547 4548 xlat_func = ata_get_xlat_func(dev, scsi_op); 4549 } 4550 4551 if (xlat_func) 4552 return ata_scsi_translate(dev, scmd, xlat_func); 4553 4554 ata_scsi_simulate(dev, scmd); 4555 4556 return 0; 4557 4558 bad_cdb_len: 4559 scmd->result = DID_ERROR << 16; 4560 scsi_done(scmd); 4561 return 0; 4562 } 4563 4564 /** 4565 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4566 * @shost: SCSI host of command to be sent 4567 * @cmd: SCSI command to be sent 4568 * 4569 * In some cases, this function translates SCSI commands into 4570 * ATA taskfiles, and queues the taskfiles to be sent to 4571 * hardware. In other cases, this function simulates a 4572 * SCSI device by evaluating and responding to certain 4573 * SCSI commands. This creates the overall effect of 4574 * ATA and ATAPI devices appearing as SCSI devices. 4575 * 4576 * LOCKING: 4577 * ATA host lock 4578 * 4579 * RETURNS: 4580 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4581 * 0 otherwise. 4582 */ 4583 enum scsi_qc_status ata_scsi_queuecmd(struct Scsi_Host *shost, 4584 struct scsi_cmnd *cmd) 4585 { 4586 struct ata_port *ap; 4587 struct ata_device *dev; 4588 struct scsi_device *scsidev = cmd->device; 4589 enum scsi_qc_status rc = 0; 4590 unsigned long irq_flags; 4591 4592 ap = ata_shost_to_port(shost); 4593 4594 spin_lock_irqsave(ap->lock, irq_flags); 4595 4596 dev = ata_scsi_find_dev(ap, scsidev); 4597 if (likely(dev)) 4598 rc = __ata_scsi_queuecmd(cmd, dev); 4599 else { 4600 cmd->result = (DID_BAD_TARGET << 16); 4601 scsi_done(cmd); 4602 } 4603 4604 spin_unlock_irqrestore(ap->lock, irq_flags); 4605 4606 return rc; 4607 } 4608 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4609 4610 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4611 { 4612 int i, rc; 4613 4614 for (i = 0; i < host->n_ports; i++) { 4615 struct ata_port *ap = host->ports[i]; 4616 struct Scsi_Host *shost; 4617 4618 rc = -ENOMEM; 4619 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4620 if (!shost) 4621 goto err_alloc; 4622 4623 shost->eh_noresume = 1; 4624 *(struct ata_port **)&shost->hostdata[0] = ap; 4625 ap->scsi_host = shost; 4626 4627 shost->transportt = &ata_scsi_transportt; 4628 shost->unique_id = ap->print_id; 4629 shost->max_id = 16; 4630 shost->max_lun = 1; 4631 shost->max_channel = 1; 4632 shost->max_cmd_len = 32; 4633 4634 /* Schedule policy is determined by ->qc_defer() 4635 * callback and it needs to see every deferred qc. 4636 * Set host_blocked to 1 to prevent SCSI midlayer from 4637 * automatically deferring requests. 4638 */ 4639 shost->max_host_blocked = 1; 4640 4641 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4642 if (rc) 4643 goto err_alloc; 4644 } 4645 4646 return 0; 4647 4648 err_alloc: 4649 while (--i >= 0) { 4650 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4651 4652 /* scsi_host_put() is in ata_devres_release() */ 4653 scsi_remove_host(shost); 4654 } 4655 return rc; 4656 } 4657 4658 #ifdef CONFIG_OF 4659 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4660 { 4661 struct scsi_device *sdev = dev->sdev; 4662 struct device *d = ap->host->dev; 4663 struct device_node *np = d->of_node; 4664 struct device_node *child; 4665 4666 for_each_available_child_of_node(np, child) { 4667 int ret; 4668 u32 val; 4669 4670 ret = of_property_read_u32(child, "reg", &val); 4671 if (ret) 4672 continue; 4673 if (val == dev->devno) { 4674 dev_dbg(d, "found matching device node\n"); 4675 sdev->sdev_gendev.of_node = child; 4676 return; 4677 } 4678 } 4679 } 4680 #else 4681 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4682 { 4683 } 4684 #endif 4685 4686 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4687 { 4688 int tries = 5; 4689 struct ata_device *last_failed_dev = NULL; 4690 struct ata_link *link; 4691 struct ata_device *dev; 4692 4693 repeat: 4694 ata_for_each_link(link, ap, EDGE) { 4695 ata_for_each_dev(dev, link, ENABLED) { 4696 struct scsi_device *sdev; 4697 int channel = 0, id = 0; 4698 4699 if (dev->sdev) 4700 continue; 4701 4702 if (ata_is_host_link(link)) 4703 id = dev->devno; 4704 else 4705 channel = link->pmp; 4706 4707 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4708 NULL); 4709 if (!IS_ERR(sdev)) { 4710 dev->sdev = sdev; 4711 ata_scsi_assign_ofnode(dev, ap); 4712 scsi_device_put(sdev); 4713 } else { 4714 dev->sdev = NULL; 4715 } 4716 } 4717 } 4718 4719 /* If we scanned while EH was in progress or allocation 4720 * failure occurred, scan would have failed silently. Check 4721 * whether all devices are attached. 4722 */ 4723 ata_for_each_link(link, ap, EDGE) { 4724 ata_for_each_dev(dev, link, ENABLED) { 4725 if (!dev->sdev) 4726 goto exit_loop; 4727 } 4728 } 4729 exit_loop: 4730 if (!link) 4731 return; 4732 4733 /* we're missing some SCSI devices */ 4734 if (sync) { 4735 /* If caller requested synchrnous scan && we've made 4736 * any progress, sleep briefly and repeat. 4737 */ 4738 if (dev != last_failed_dev) { 4739 msleep(100); 4740 last_failed_dev = dev; 4741 goto repeat; 4742 } 4743 4744 /* We might be failing to detect boot device, give it 4745 * a few more chances. 4746 */ 4747 if (--tries) { 4748 msleep(100); 4749 goto repeat; 4750 } 4751 4752 ata_port_err(ap, 4753 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4754 } 4755 4756 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4757 round_jiffies_relative(HZ)); 4758 } 4759 4760 /** 4761 * ata_scsi_offline_dev - offline attached SCSI device 4762 * @dev: ATA device to offline attached SCSI device for 4763 * 4764 * This function is called from ata_eh_detach_dev() and is responsible for 4765 * taking the SCSI device attached to @dev offline. This function is 4766 * called with host lock which protects dev->sdev against clearing. 4767 * 4768 * LOCKING: 4769 * spin_lock_irqsave(host lock) 4770 * 4771 * RETURNS: 4772 * true if attached SCSI device exists, false otherwise. 4773 */ 4774 bool ata_scsi_offline_dev(struct ata_device *dev) 4775 { 4776 if (dev->sdev) { 4777 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4778 return true; 4779 } 4780 return false; 4781 } 4782 4783 /** 4784 * ata_scsi_remove_dev - remove attached SCSI device 4785 * @dev: ATA device to remove attached SCSI device for 4786 * 4787 * This function is called from ata_eh_scsi_hotplug() and 4788 * responsible for removing the SCSI device attached to @dev. 4789 * 4790 * LOCKING: 4791 * Kernel thread context (may sleep). 4792 */ 4793 static void ata_scsi_remove_dev(struct ata_device *dev) 4794 { 4795 struct ata_port *ap = dev->link->ap; 4796 struct scsi_device *sdev; 4797 unsigned long flags; 4798 4799 /* Alas, we need to grab scan_mutex to ensure SCSI device 4800 * state doesn't change underneath us and thus 4801 * scsi_device_get() always succeeds. The mutex locking can 4802 * be removed if there is __scsi_device_get() interface which 4803 * increments reference counts regardless of device state. 4804 */ 4805 mutex_lock(&ap->scsi_host->scan_mutex); 4806 spin_lock_irqsave(ap->lock, flags); 4807 4808 /* clearing dev->sdev is protected by host lock */ 4809 sdev = dev->sdev; 4810 dev->sdev = NULL; 4811 4812 if (sdev) { 4813 /* If user initiated unplug races with us, sdev can go 4814 * away underneath us after the host lock and 4815 * scan_mutex are released. Hold onto it. 4816 */ 4817 if (scsi_device_get(sdev) == 0) { 4818 /* The following ensures the attached sdev is 4819 * offline on return from ata_scsi_offline_dev() 4820 * regardless it wins or loses the race 4821 * against this function. 4822 */ 4823 scsi_device_set_state(sdev, SDEV_OFFLINE); 4824 } else { 4825 WARN_ON(1); 4826 sdev = NULL; 4827 } 4828 } 4829 4830 spin_unlock_irqrestore(ap->lock, flags); 4831 mutex_unlock(&ap->scsi_host->scan_mutex); 4832 4833 if (sdev) { 4834 ata_dev_info(dev, "detaching (SCSI %s)\n", 4835 dev_name(&sdev->sdev_gendev)); 4836 4837 scsi_remove_device(sdev); 4838 scsi_device_put(sdev); 4839 } 4840 } 4841 4842 static void ata_scsi_handle_link_detach(struct ata_link *link) 4843 { 4844 struct ata_port *ap = link->ap; 4845 struct ata_device *dev; 4846 4847 ata_for_each_dev(dev, link, ALL) { 4848 unsigned long flags; 4849 4850 spin_lock_irqsave(ap->lock, flags); 4851 if (!(dev->flags & ATA_DFLAG_DETACHED)) { 4852 spin_unlock_irqrestore(ap->lock, flags); 4853 continue; 4854 } 4855 4856 dev->flags &= ~ATA_DFLAG_DETACHED; 4857 spin_unlock_irqrestore(ap->lock, flags); 4858 4859 ata_scsi_remove_dev(dev); 4860 } 4861 } 4862 4863 /** 4864 * ata_scsi_media_change_notify - send media change event 4865 * @dev: Pointer to the disk device with media change event 4866 * 4867 * Tell the block layer to send a media change notification 4868 * event. 4869 * 4870 * LOCKING: 4871 * spin_lock_irqsave(host lock) 4872 */ 4873 void ata_scsi_media_change_notify(struct ata_device *dev) 4874 { 4875 if (dev->sdev) 4876 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4877 GFP_ATOMIC); 4878 } 4879 4880 /** 4881 * ata_scsi_hotplug - SCSI part of hotplug 4882 * @work: Pointer to ATA port to perform SCSI hotplug on 4883 * 4884 * Perform SCSI part of hotplug. It's executed from a separate 4885 * workqueue after EH completes. This is necessary because SCSI 4886 * hot plugging requires working EH and hot unplugging is 4887 * synchronized with hot plugging with a mutex. 4888 * 4889 * LOCKING: 4890 * Kernel thread context (may sleep). 4891 */ 4892 void ata_scsi_hotplug(struct work_struct *work) 4893 { 4894 struct ata_port *ap = 4895 container_of(work, struct ata_port, hotplug_task.work); 4896 int i; 4897 4898 if (ap->pflags & ATA_PFLAG_UNLOADING) 4899 return; 4900 4901 mutex_lock(&ap->scsi_scan_mutex); 4902 4903 /* Unplug detached devices. We cannot use link iterator here 4904 * because PMP links have to be scanned even if PMP is 4905 * currently not attached. Iterate manually. 4906 */ 4907 ata_scsi_handle_link_detach(&ap->link); 4908 if (ap->pmp_link) 4909 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4910 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4911 4912 /* scan for new ones */ 4913 ata_scsi_scan_host(ap, 0); 4914 4915 mutex_unlock(&ap->scsi_scan_mutex); 4916 } 4917 4918 /** 4919 * ata_scsi_user_scan - indication for user-initiated bus scan 4920 * @shost: SCSI host to scan 4921 * @channel: Channel to scan 4922 * @id: ID to scan 4923 * @lun: LUN to scan 4924 * 4925 * This function is called when user explicitly requests bus 4926 * scan. Set probe pending flag and invoke EH. 4927 * 4928 * LOCKING: 4929 * SCSI layer (we don't care) 4930 * 4931 * RETURNS: 4932 * Zero. 4933 */ 4934 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4935 unsigned int id, u64 lun) 4936 { 4937 struct ata_port *ap = ata_shost_to_port(shost); 4938 unsigned long flags; 4939 int devno, rc = 0; 4940 4941 if (lun != SCAN_WILD_CARD && lun) 4942 return -EINVAL; 4943 4944 if (!sata_pmp_attached(ap)) { 4945 if (channel != SCAN_WILD_CARD && channel) 4946 return -EINVAL; 4947 devno = id; 4948 } else { 4949 if (id != SCAN_WILD_CARD && id) 4950 return -EINVAL; 4951 devno = channel; 4952 } 4953 4954 spin_lock_irqsave(ap->lock, flags); 4955 4956 if (devno == SCAN_WILD_CARD) { 4957 struct ata_link *link; 4958 4959 ata_for_each_link(link, ap, EDGE) { 4960 struct ata_eh_info *ehi = &link->eh_info; 4961 ehi->probe_mask |= ATA_ALL_DEVICES; 4962 ehi->action |= ATA_EH_RESET; 4963 } 4964 } else { 4965 struct ata_device *dev = ata_find_dev(ap, devno); 4966 4967 if (dev) { 4968 struct ata_eh_info *ehi = &dev->link->eh_info; 4969 ehi->probe_mask |= 1 << dev->devno; 4970 ehi->action |= ATA_EH_RESET; 4971 } else 4972 rc = -EINVAL; 4973 } 4974 4975 if (rc == 0) { 4976 ata_port_schedule_eh(ap); 4977 spin_unlock_irqrestore(ap->lock, flags); 4978 ata_port_wait_eh(ap); 4979 } else 4980 spin_unlock_irqrestore(ap->lock, flags); 4981 4982 return rc; 4983 } 4984 4985 /** 4986 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4987 * @work: Pointer to ATA port to perform scsi_rescan_device() 4988 * 4989 * After ATA pass thru (SAT) commands are executed successfully, 4990 * libata need to propagate the changes to SCSI layer. 4991 * 4992 * LOCKING: 4993 * Kernel thread context (may sleep). 4994 */ 4995 void ata_scsi_dev_rescan(struct work_struct *work) 4996 { 4997 struct ata_port *ap = 4998 container_of(work, struct ata_port, scsi_rescan_task.work); 4999 struct ata_link *link; 5000 struct ata_device *dev; 5001 unsigned long flags; 5002 bool do_resume; 5003 int ret = 0; 5004 5005 mutex_lock(&ap->scsi_scan_mutex); 5006 spin_lock_irqsave(ap->lock, flags); 5007 5008 ata_for_each_link(link, ap, EDGE) { 5009 ata_for_each_dev(dev, link, ENABLED) { 5010 struct scsi_device *sdev = dev->sdev; 5011 5012 /* 5013 * If the port was suspended before this was scheduled, 5014 * bail out. 5015 */ 5016 if (ap->pflags & ATA_PFLAG_SUSPENDED) 5017 goto unlock_ap; 5018 5019 if (!sdev) 5020 continue; 5021 if (scsi_device_get(sdev)) 5022 continue; 5023 5024 do_resume = dev->flags & ATA_DFLAG_RESUMING; 5025 5026 spin_unlock_irqrestore(ap->lock, flags); 5027 if (do_resume) { 5028 ret = scsi_resume_device(sdev); 5029 if (ret == -EWOULDBLOCK) { 5030 scsi_device_put(sdev); 5031 goto unlock_scan; 5032 } 5033 dev->flags &= ~ATA_DFLAG_RESUMING; 5034 } 5035 ret = scsi_rescan_device(sdev); 5036 scsi_device_put(sdev); 5037 spin_lock_irqsave(ap->lock, flags); 5038 5039 if (ret) 5040 goto unlock_ap; 5041 } 5042 } 5043 5044 unlock_ap: 5045 spin_unlock_irqrestore(ap->lock, flags); 5046 unlock_scan: 5047 mutex_unlock(&ap->scsi_scan_mutex); 5048 5049 /* Reschedule with a delay if scsi_rescan_device() returned an error */ 5050 if (ret) 5051 schedule_delayed_work(&ap->scsi_rescan_task, 5052 msecs_to_jiffies(5)); 5053 } 5054