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