1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * libata-scsi.c - helper library for ATA 4 * 5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 6 * Copyright 2003-2004 Jeff Garzik 7 * 8 * libata documentation is available via 'make {ps|pdf}docs', 9 * as Documentation/driver-api/libata.rst 10 * 11 * Hardware documentation available from 12 * - http://www.t10.org/ 13 * - http://www.t13.org/ 14 */ 15 16 #include <linux/compat.h> 17 #include <linux/slab.h> 18 #include <linux/kernel.h> 19 #include <linux/blkdev.h> 20 #include <linux/spinlock.h> 21 #include <linux/export.h> 22 #include <scsi/scsi.h> 23 #include <scsi/scsi_host.h> 24 #include <scsi/scsi_cmnd.h> 25 #include <scsi/scsi_eh.h> 26 #include <scsi/scsi_device.h> 27 #include <scsi/scsi_tcq.h> 28 #include <scsi/scsi_transport.h> 29 #include <linux/libata.h> 30 #include <linux/hdreg.h> 31 #include <linux/uaccess.h> 32 #include <linux/suspend.h> 33 #include <linux/unaligned.h> 34 #include <linux/ioprio.h> 35 #include <linux/of.h> 36 37 #include "libata.h" 38 #include "libata-transport.h" 39 40 #define ATA_SCSI_RBUF_SIZE 2048 41 42 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 43 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 44 45 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 46 47 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 48 const struct scsi_device *scsidev); 49 50 #define RW_RECOVERY_MPAGE 0x1 51 #define RW_RECOVERY_MPAGE_LEN 12 52 #define CACHE_MPAGE 0x8 53 #define CACHE_MPAGE_LEN 20 54 #define CONTROL_MPAGE 0xa 55 #define CONTROL_MPAGE_LEN 12 56 #define ALL_MPAGES 0x3f 57 #define ALL_SUB_MPAGES 0xff 58 #define CDL_T2A_SUB_MPAGE 0x07 59 #define CDL_T2B_SUB_MPAGE 0x08 60 #define CDL_T2_SUB_MPAGE_LEN 232 61 #define ATA_FEATURE_SUB_MPAGE 0xf2 62 #define ATA_FEATURE_SUB_MPAGE_LEN 16 63 64 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 65 RW_RECOVERY_MPAGE, 66 RW_RECOVERY_MPAGE_LEN - 2, 67 (1 << 7), /* AWRE */ 68 0, /* read retry count */ 69 0, 0, 0, 0, 70 0, /* write retry count */ 71 0, 0, 0 72 }; 73 74 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 75 CACHE_MPAGE, 76 CACHE_MPAGE_LEN - 2, 77 0, /* contains WCE, needs to be 0 for logic */ 78 0, 0, 0, 0, 0, 0, 0, 0, 0, 79 0, /* contains DRA, needs to be 0 for logic */ 80 0, 0, 0, 0, 0, 0, 0 81 }; 82 83 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 84 CONTROL_MPAGE, 85 CONTROL_MPAGE_LEN - 2, 86 2, /* DSENSE=0, GLTSD=1 */ 87 0, /* [QAM+QERR may be 1, see 05-359r1] */ 88 0, 0, 0, 0, 0xff, 0xff, 89 0, 30 /* extended self test time, see 05-359r1 */ 90 }; 91 92 static ssize_t ata_scsi_park_show(struct device *device, 93 struct device_attribute *attr, char *buf) 94 { 95 struct scsi_device *sdev = to_scsi_device(device); 96 struct ata_port *ap; 97 struct ata_link *link; 98 struct ata_device *dev; 99 unsigned long now; 100 unsigned int msecs; 101 int rc = 0; 102 103 ap = ata_shost_to_port(sdev->host); 104 105 spin_lock_irq(ap->lock); 106 dev = ata_scsi_find_dev(ap, sdev); 107 if (!dev) { 108 rc = -ENODEV; 109 goto unlock; 110 } 111 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 112 rc = -EOPNOTSUPP; 113 goto unlock; 114 } 115 116 link = dev->link; 117 now = jiffies; 118 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 119 link->eh_context.unloaded_mask & (1 << dev->devno) && 120 time_after(dev->unpark_deadline, now)) 121 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 122 else 123 msecs = 0; 124 125 unlock: 126 spin_unlock_irq(ap->lock); 127 128 return rc ? rc : sysfs_emit(buf, "%u\n", msecs); 129 } 130 131 static ssize_t ata_scsi_park_store(struct device *device, 132 struct device_attribute *attr, 133 const char *buf, size_t len) 134 { 135 struct scsi_device *sdev = to_scsi_device(device); 136 struct ata_port *ap; 137 struct ata_device *dev; 138 int input; 139 unsigned long flags; 140 int rc; 141 142 rc = kstrtoint(buf, 10, &input); 143 if (rc) 144 return rc; 145 if (input < -2) 146 return -EINVAL; 147 if (input > ATA_TMOUT_MAX_PARK) { 148 rc = -EOVERFLOW; 149 input = ATA_TMOUT_MAX_PARK; 150 } 151 152 ap = ata_shost_to_port(sdev->host); 153 154 spin_lock_irqsave(ap->lock, flags); 155 dev = ata_scsi_find_dev(ap, sdev); 156 if (unlikely(!dev)) { 157 rc = -ENODEV; 158 goto unlock; 159 } 160 if (dev->class != ATA_DEV_ATA && 161 dev->class != ATA_DEV_ZAC) { 162 rc = -EOPNOTSUPP; 163 goto unlock; 164 } 165 166 if (input >= 0) { 167 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 168 rc = -EOPNOTSUPP; 169 goto unlock; 170 } 171 172 dev->unpark_deadline = ata_deadline(jiffies, input); 173 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 174 ata_port_schedule_eh(ap); 175 complete(&ap->park_req_pending); 176 } else { 177 switch (input) { 178 case -1: 179 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 180 break; 181 case -2: 182 dev->flags |= ATA_DFLAG_NO_UNLOAD; 183 break; 184 } 185 } 186 unlock: 187 spin_unlock_irqrestore(ap->lock, flags); 188 189 return rc ? rc : len; 190 } 191 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 192 ata_scsi_park_show, ata_scsi_park_store); 193 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 194 195 bool ata_scsi_sense_is_valid(u8 sk, u8 asc, u8 ascq) 196 { 197 /* 198 * If sk == NO_SENSE, and asc + ascq == NO ADDITIONAL SENSE INFORMATION, 199 * then there is no sense data to add. 200 */ 201 if (sk == 0 && asc == 0 && ascq == 0) 202 return false; 203 204 /* If sk > COMPLETED, sense data is bogus. */ 205 if (sk > COMPLETED) 206 return false; 207 208 return true; 209 } 210 211 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 212 u8 sk, u8 asc, u8 ascq) 213 { 214 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 215 216 scsi_build_sense(cmd, d_sense, sk, asc, ascq); 217 } 218 219 static void ata_scsi_set_sense_information(struct ata_queued_cmd *qc) 220 { 221 u64 information; 222 223 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 224 ata_dev_dbg(qc->dev, 225 "missing result TF: can't set INFORMATION sense field\n"); 226 return; 227 } 228 229 information = ata_tf_read_block(&qc->result_tf, qc->dev); 230 if (information == U64_MAX) 231 return; 232 233 scsi_set_sense_information(qc->scsicmd->sense_buffer, 234 SCSI_SENSE_BUFFERSIZE, information); 235 } 236 237 /** 238 * ata_scsi_set_passthru_sense_fields - Set ATA fields in sense buffer 239 * @qc: ATA PASS-THROUGH command. 240 * 241 * Populates "ATA Status Return sense data descriptor" / "Fixed format 242 * sense data" with ATA taskfile fields. 243 * 244 * LOCKING: 245 * None. 246 */ 247 static void ata_scsi_set_passthru_sense_fields(struct ata_queued_cmd *qc) 248 { 249 struct ata_device *dev = qc->dev; 250 struct scsi_cmnd *cmd = qc->scsicmd; 251 struct ata_taskfile *tf = &qc->result_tf; 252 unsigned char *sb = cmd->sense_buffer; 253 254 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 255 ata_dev_dbg(dev, 256 "missing result TF: can't set ATA PT sense fields\n"); 257 return; 258 } 259 260 if ((sb[0] & 0x7f) >= 0x72) { 261 unsigned char *desc; 262 u8 len; 263 264 /* descriptor format */ 265 len = sb[7]; 266 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 267 if (!desc) { 268 if (SCSI_SENSE_BUFFERSIZE < len + 14) 269 return; 270 sb[7] = len + 14; 271 desc = sb + 8 + len; 272 } 273 desc[0] = 9; 274 desc[1] = 12; 275 /* 276 * Copy registers into sense buffer. 277 */ 278 desc[2] = 0x00; 279 desc[3] = tf->error; 280 desc[5] = tf->nsect; 281 desc[7] = tf->lbal; 282 desc[9] = tf->lbam; 283 desc[11] = tf->lbah; 284 desc[12] = tf->device; 285 desc[13] = tf->status; 286 287 /* 288 * Fill in Extend bit, and the high order bytes 289 * if applicable. 290 */ 291 if (tf->flags & ATA_TFLAG_LBA48) { 292 desc[2] |= 0x01; 293 desc[4] = tf->hob_nsect; 294 desc[6] = tf->hob_lbal; 295 desc[8] = tf->hob_lbam; 296 desc[10] = tf->hob_lbah; 297 } 298 } else { 299 /* Fixed sense format */ 300 sb[0] |= 0x80; 301 sb[3] = tf->error; 302 sb[4] = tf->status; 303 sb[5] = tf->device; 304 sb[6] = tf->nsect; 305 if (tf->flags & ATA_TFLAG_LBA48) { 306 sb[8] |= 0x80; 307 if (tf->hob_nsect) 308 sb[8] |= 0x40; 309 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 310 sb[8] |= 0x20; 311 } 312 sb[9] = tf->lbal; 313 sb[10] = tf->lbam; 314 sb[11] = tf->lbah; 315 } 316 } 317 318 static void ata_scsi_set_invalid_field(struct ata_device *dev, 319 struct scsi_cmnd *cmd, u16 field, u8 bit) 320 { 321 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 322 /* "Invalid field in CDB" */ 323 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 324 field, bit, 1); 325 } 326 327 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 328 struct scsi_cmnd *cmd, u16 field) 329 { 330 /* "Invalid field in parameter list" */ 331 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 332 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 333 field, 0xff, 0); 334 } 335 336 static struct attribute *ata_common_sdev_attrs[] = { 337 &dev_attr_unload_heads.attr, 338 NULL 339 }; 340 341 static const struct attribute_group ata_common_sdev_attr_group = { 342 .attrs = ata_common_sdev_attrs 343 }; 344 345 const struct attribute_group *ata_common_sdev_groups[] = { 346 &ata_common_sdev_attr_group, 347 NULL 348 }; 349 EXPORT_SYMBOL_GPL(ata_common_sdev_groups); 350 351 /** 352 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 353 * @sdev: SCSI device for which BIOS geometry is to be determined 354 * @unused: gendisk associated with @sdev 355 * @capacity: capacity of SCSI device 356 * @geom: location to which geometry will be output 357 * 358 * Generic bios head/sector/cylinder calculator 359 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 360 * mapping. Some situations may arise where the disk is not 361 * bootable if this is not used. 362 * 363 * LOCKING: 364 * Defined by the SCSI layer. We don't really care. 365 * 366 * RETURNS: 367 * Zero. 368 */ 369 int ata_std_bios_param(struct scsi_device *sdev, struct gendisk *unused, 370 sector_t capacity, int geom[]) 371 { 372 geom[0] = 255; 373 geom[1] = 63; 374 sector_div(capacity, 255*63); 375 geom[2] = capacity; 376 377 return 0; 378 } 379 EXPORT_SYMBOL_GPL(ata_std_bios_param); 380 381 /** 382 * ata_scsi_unlock_native_capacity - unlock native capacity 383 * @sdev: SCSI device to adjust device capacity for 384 * 385 * This function is called if a partition on @sdev extends beyond 386 * the end of the device. It requests EH to unlock HPA. 387 * 388 * LOCKING: 389 * Defined by the SCSI layer. Might sleep. 390 */ 391 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 392 { 393 struct ata_port *ap = ata_shost_to_port(sdev->host); 394 struct ata_device *dev; 395 unsigned long flags; 396 397 spin_lock_irqsave(ap->lock, flags); 398 399 dev = ata_scsi_find_dev(ap, sdev); 400 if (dev && dev->n_sectors < dev->n_native_sectors) { 401 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 402 dev->link->eh_info.action |= ATA_EH_RESET; 403 ata_port_schedule_eh(ap); 404 } 405 406 spin_unlock_irqrestore(ap->lock, flags); 407 ata_port_wait_eh(ap); 408 } 409 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 410 411 /** 412 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 413 * @ap: target port 414 * @sdev: SCSI device to get identify data for 415 * @arg: User buffer area for identify data 416 * 417 * LOCKING: 418 * Defined by the SCSI layer. We don't really care. 419 * 420 * RETURNS: 421 * Zero on success, negative errno on error. 422 */ 423 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 424 void __user *arg) 425 { 426 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 427 u16 __user *dst = arg; 428 char buf[40]; 429 430 if (!dev) 431 return -ENOMSG; 432 433 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 434 return -EFAULT; 435 436 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 437 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 438 return -EFAULT; 439 440 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 441 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 442 return -EFAULT; 443 444 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 445 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 446 return -EFAULT; 447 448 return 0; 449 } 450 451 /** 452 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 453 * @scsidev: Device to which we are issuing command 454 * @arg: User provided data for issuing command 455 * 456 * LOCKING: 457 * Defined by the SCSI layer. We don't really care. 458 * 459 * RETURNS: 460 * Zero on success, negative errno on error. 461 */ 462 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 463 { 464 int rc = 0; 465 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 466 u8 scsi_cmd[MAX_COMMAND_SIZE]; 467 u8 args[4], *argbuf = NULL; 468 int argsize = 0; 469 struct scsi_sense_hdr sshdr; 470 const struct scsi_exec_args exec_args = { 471 .sshdr = &sshdr, 472 .sense = sensebuf, 473 .sense_len = sizeof(sensebuf), 474 }; 475 int cmd_result; 476 477 if (arg == NULL) 478 return -EINVAL; 479 480 if (copy_from_user(args, arg, sizeof(args))) 481 return -EFAULT; 482 483 memset(sensebuf, 0, sizeof(sensebuf)); 484 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 485 486 if (args[3]) { 487 argsize = ATA_SECT_SIZE * args[3]; 488 argbuf = kmalloc(argsize, GFP_KERNEL); 489 if (argbuf == NULL) { 490 rc = -ENOMEM; 491 goto error; 492 } 493 494 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 495 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 496 block count in sector count field */ 497 } else { 498 scsi_cmd[1] = (3 << 1); /* Non-data */ 499 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 500 } 501 502 scsi_cmd[0] = ATA_16; 503 504 scsi_cmd[4] = args[2]; 505 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 506 scsi_cmd[6] = args[3]; 507 scsi_cmd[8] = args[1]; 508 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 509 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 510 } else { 511 scsi_cmd[6] = args[1]; 512 } 513 scsi_cmd[14] = args[0]; 514 515 /* Good values for timeout and retries? Values below 516 from scsi_ioctl_send_command() for default case... */ 517 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, argbuf, 518 argsize, 10 * HZ, 5, &exec_args); 519 if (cmd_result < 0) { 520 rc = cmd_result; 521 goto error; 522 } 523 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 524 u8 *desc = sensebuf + 8; 525 526 /* If we set cc then ATA pass-through will cause a 527 * check condition even if no error. Filter that. */ 528 if (scsi_status_is_check_condition(cmd_result)) { 529 if (sshdr.sense_key == RECOVERED_ERROR && 530 sshdr.asc == 0 && sshdr.ascq == 0x1d) 531 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 532 } 533 534 /* Send userspace a few ATA registers (same as drivers/ide) */ 535 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 536 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 537 args[0] = desc[13]; /* status */ 538 args[1] = desc[3]; /* error */ 539 args[2] = desc[5]; /* sector count (0:7) */ 540 if (copy_to_user(arg, args, sizeof(args))) 541 rc = -EFAULT; 542 } 543 } 544 545 546 if (cmd_result) { 547 rc = -EIO; 548 goto error; 549 } 550 551 if ((argbuf) 552 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 553 rc = -EFAULT; 554 error: 555 kfree(argbuf); 556 return rc; 557 } 558 559 /** 560 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 561 * @scsidev: Device to which we are issuing command 562 * @arg: User provided data for issuing command 563 * 564 * LOCKING: 565 * Defined by the SCSI layer. We don't really care. 566 * 567 * RETURNS: 568 * Zero on success, negative errno on error. 569 */ 570 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 571 { 572 int rc = 0; 573 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 574 u8 scsi_cmd[MAX_COMMAND_SIZE]; 575 u8 args[7]; 576 struct scsi_sense_hdr sshdr; 577 int cmd_result; 578 const struct scsi_exec_args exec_args = { 579 .sshdr = &sshdr, 580 .sense = sensebuf, 581 .sense_len = sizeof(sensebuf), 582 }; 583 584 if (arg == NULL) 585 return -EINVAL; 586 587 if (copy_from_user(args, arg, sizeof(args))) 588 return -EFAULT; 589 590 memset(sensebuf, 0, sizeof(sensebuf)); 591 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 592 scsi_cmd[0] = ATA_16; 593 scsi_cmd[1] = (3 << 1); /* Non-data */ 594 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 595 scsi_cmd[4] = args[1]; 596 scsi_cmd[6] = args[2]; 597 scsi_cmd[8] = args[3]; 598 scsi_cmd[10] = args[4]; 599 scsi_cmd[12] = args[5]; 600 scsi_cmd[13] = args[6] & 0x4f; 601 scsi_cmd[14] = args[0]; 602 603 /* Good values for timeout and retries? Values below 604 from scsi_ioctl_send_command() for default case... */ 605 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, NULL, 606 0, 10 * HZ, 5, &exec_args); 607 if (cmd_result < 0) { 608 rc = cmd_result; 609 goto error; 610 } 611 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 612 u8 *desc = sensebuf + 8; 613 614 /* If we set cc then ATA pass-through will cause a 615 * check condition even if no error. Filter that. */ 616 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 617 if (sshdr.sense_key == RECOVERED_ERROR && 618 sshdr.asc == 0 && sshdr.ascq == 0x1d) 619 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 620 } 621 622 /* Send userspace ATA registers */ 623 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 624 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 625 args[0] = desc[13]; /* status */ 626 args[1] = desc[3]; /* error */ 627 args[2] = desc[5]; /* sector count (0:7) */ 628 args[3] = desc[7]; /* lbal */ 629 args[4] = desc[9]; /* lbam */ 630 args[5] = desc[11]; /* lbah */ 631 args[6] = desc[12]; /* select */ 632 if (copy_to_user(arg, args, sizeof(args))) 633 rc = -EFAULT; 634 } 635 } 636 637 if (cmd_result) { 638 rc = -EIO; 639 goto error; 640 } 641 642 error: 643 return rc; 644 } 645 646 static bool ata_ioc32(struct ata_port *ap) 647 { 648 if (ap->flags & ATA_FLAG_PIO_DMA) 649 return true; 650 if (ap->pflags & ATA_PFLAG_PIO32) 651 return true; 652 return false; 653 } 654 655 /* 656 * This handles both native and compat commands, so anything added 657 * here must have a compatible argument, or check in_compat_syscall() 658 */ 659 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 660 unsigned int cmd, void __user *arg) 661 { 662 unsigned long val; 663 int rc = -EINVAL; 664 unsigned long flags; 665 666 switch (cmd) { 667 case HDIO_GET_32BIT: 668 spin_lock_irqsave(ap->lock, flags); 669 val = ata_ioc32(ap); 670 spin_unlock_irqrestore(ap->lock, flags); 671 #ifdef CONFIG_COMPAT 672 if (in_compat_syscall()) 673 return put_user(val, (compat_ulong_t __user *)arg); 674 #endif 675 return put_user(val, (unsigned long __user *)arg); 676 677 case HDIO_SET_32BIT: 678 val = (unsigned long) arg; 679 rc = 0; 680 spin_lock_irqsave(ap->lock, flags); 681 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 682 if (val) 683 ap->pflags |= ATA_PFLAG_PIO32; 684 else 685 ap->pflags &= ~ATA_PFLAG_PIO32; 686 } else { 687 if (val != ata_ioc32(ap)) 688 rc = -EINVAL; 689 } 690 spin_unlock_irqrestore(ap->lock, flags); 691 return rc; 692 693 case HDIO_GET_IDENTITY: 694 return ata_get_identity(ap, scsidev, arg); 695 696 case HDIO_DRIVE_CMD: 697 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 698 return -EACCES; 699 return ata_cmd_ioctl(scsidev, arg); 700 701 case HDIO_DRIVE_TASK: 702 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 703 return -EACCES; 704 return ata_task_ioctl(scsidev, arg); 705 706 default: 707 rc = -ENOTTY; 708 break; 709 } 710 711 return rc; 712 } 713 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 714 715 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 716 void __user *arg) 717 { 718 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 719 scsidev, cmd, arg); 720 } 721 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 722 723 /** 724 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 725 * @dev: ATA device to which the new command is attached 726 * @cmd: SCSI command that originated this ATA command 727 * 728 * Obtain a reference to an unused ata_queued_cmd structure, 729 * which is the basic libata structure representing a single 730 * ATA command sent to the hardware. 731 * 732 * If a command was available, fill in the SCSI-specific 733 * portions of the structure with information on the 734 * current command. 735 * 736 * LOCKING: 737 * spin_lock_irqsave(host lock) 738 * 739 * RETURNS: 740 * Command allocated, or %NULL if none available. 741 */ 742 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 743 struct scsi_cmnd *cmd) 744 { 745 struct ata_port *ap = dev->link->ap; 746 struct ata_queued_cmd *qc; 747 int tag; 748 749 if (unlikely(ata_port_is_frozen(ap))) 750 goto fail; 751 752 if (ap->flags & ATA_FLAG_SAS_HOST) { 753 /* 754 * SAS hosts may queue > ATA_MAX_QUEUE commands so use 755 * unique per-device budget token as a tag. 756 */ 757 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE)) 758 goto fail; 759 tag = cmd->budget_token; 760 } else { 761 tag = scsi_cmd_to_rq(cmd)->tag; 762 } 763 764 qc = __ata_qc_from_tag(ap, tag); 765 qc->tag = qc->hw_tag = tag; 766 qc->ap = ap; 767 qc->dev = dev; 768 769 ata_qc_reinit(qc); 770 771 qc->scsicmd = cmd; 772 qc->scsidone = scsi_done; 773 774 qc->sg = scsi_sglist(cmd); 775 qc->n_elem = scsi_sg_count(cmd); 776 777 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 778 qc->flags |= ATA_QCFLAG_QUIET; 779 780 return qc; 781 782 fail: 783 set_host_byte(cmd, DID_OK); 784 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL); 785 scsi_done(cmd); 786 return NULL; 787 } 788 789 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 790 { 791 struct scsi_cmnd *scmd = qc->scsicmd; 792 793 qc->extrabytes = scmd->extra_len; 794 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 795 } 796 797 /** 798 * ata_to_sense_error - convert ATA error to SCSI error 799 * @drv_stat: value contained in ATA status register 800 * @drv_err: value contained in ATA error register 801 * @sk: the sense key we'll fill out 802 * @asc: the additional sense code we'll fill out 803 * @ascq: the additional sense code qualifier we'll fill out 804 * 805 * Converts an ATA error into a SCSI error. Fill out pointers to 806 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 807 * format sense blocks. 808 * 809 * LOCKING: 810 * spin_lock_irqsave(host lock) 811 */ 812 static void ata_to_sense_error(u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, 813 u8 *ascq) 814 { 815 int i; 816 817 /* Based on the 3ware driver translation table */ 818 static const unsigned char sense_table[][4] = { 819 /* BBD|ECC|ID|MAR */ 820 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 821 // Device busy Aborted command 822 /* BBD|ECC|ID */ 823 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 824 // Device busy Aborted command 825 /* ECC|MC|MARK */ 826 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 827 // Device fault Hardware error 828 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 829 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 830 // Data CRC error SCSI parity error 831 /* MC|ID|ABRT|TRK0|MARK */ 832 {0x37, NOT_READY, 0x04, 0x00}, 833 // Unit offline Not ready 834 /* MCR|MARK */ 835 {0x09, NOT_READY, 0x04, 0x00}, 836 // Unrecovered disk error Not ready 837 /* Bad address mark */ 838 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 839 // Address mark not found for data field 840 /* TRK0 - Track 0 not found */ 841 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 842 // Hardware error 843 /* Abort: 0x04 is not translated here, see below */ 844 /* Media change request */ 845 {0x08, NOT_READY, 0x04, 0x00}, 846 // FIXME: faking offline 847 /* SRV/IDNF - ID not found */ 848 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 849 // Logical address out of range 850 /* MC - Media Changed */ 851 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 852 // Not ready to ready change, medium may have changed 853 /* ECC - Uncorrectable ECC error */ 854 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 855 // Unrecovered read error 856 /* BBD - block marked bad */ 857 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 858 // Block marked bad Medium error, unrecovered read error 859 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 860 }; 861 static const unsigned char stat_table[][4] = { 862 /* Busy: must be first because BUSY means no other bits valid */ 863 { ATA_BUSY, ABORTED_COMMAND, 0x00, 0x00 }, 864 /* Device fault: INTERNAL TARGET FAILURE */ 865 { ATA_DF, HARDWARE_ERROR, 0x44, 0x00 }, 866 /* Corrected data error */ 867 { ATA_CORR, RECOVERED_ERROR, 0x00, 0x00 }, 868 869 { 0xFF, 0xFF, 0xFF, 0xFF }, /* END mark */ 870 }; 871 872 /* 873 * Is this an error we can process/parse 874 */ 875 if (drv_stat & ATA_BUSY) { 876 drv_err = 0; /* Ignore the err bits, they're invalid */ 877 } 878 879 if (drv_err) { 880 /* Look for drv_err */ 881 for (i = 0; sense_table[i][0] != 0xFF; i++) { 882 /* Look for best matches first */ 883 if ((sense_table[i][0] & drv_err) == 884 sense_table[i][0]) { 885 *sk = sense_table[i][1]; 886 *asc = sense_table[i][2]; 887 *ascq = sense_table[i][3]; 888 return; 889 } 890 } 891 } 892 893 /* 894 * Fall back to interpreting status bits. Note that if the drv_err 895 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 896 * is not descriptive enough. 897 */ 898 for (i = 0; stat_table[i][0] != 0xFF; i++) { 899 if (stat_table[i][0] & drv_stat) { 900 *sk = stat_table[i][1]; 901 *asc = stat_table[i][2]; 902 *ascq = stat_table[i][3]; 903 return; 904 } 905 } 906 907 /* 908 * We need a sensible error return here, which is tricky, and one 909 * that won't cause people to do things like return a disk wrongly. 910 */ 911 *sk = ABORTED_COMMAND; 912 *asc = 0x00; 913 *ascq = 0x00; 914 } 915 916 /* 917 * ata_gen_passthru_sense - Generate check condition sense block. 918 * @qc: Command that completed. 919 * 920 * This function is specific to the ATA pass through commands. 921 * Regardless of whether the command errored or not, return a sense 922 * block. If there was no error, we get the request from an ATA 923 * passthrough command, so we use the following sense data: 924 * sk = RECOVERED ERROR 925 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 926 * 927 * 928 * LOCKING: 929 * None. 930 */ 931 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 932 { 933 struct ata_device *dev = qc->dev; 934 struct scsi_cmnd *cmd = qc->scsicmd; 935 struct ata_taskfile *tf = &qc->result_tf; 936 u8 sense_key, asc, ascq; 937 938 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 939 ata_dev_dbg(dev, 940 "missing result TF: can't generate ATA PT sense data\n"); 941 if (qc->err_mask) 942 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 943 return; 944 } 945 946 /* 947 * Use ata_to_sense_error() to map status register bits 948 * onto sense key, asc & ascq. 949 */ 950 if (qc->err_mask || 951 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 952 ata_to_sense_error(tf->status, tf->error, 953 &sense_key, &asc, &ascq); 954 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 955 } else { 956 /* 957 * ATA PASS-THROUGH INFORMATION AVAILABLE 958 * 959 * Note: we are supposed to call ata_scsi_set_sense(), which 960 * respects the D_SENSE bit, instead of unconditionally 961 * generating the sense data in descriptor format. However, 962 * because hdparm, hddtemp, and udisks incorrectly assume sense 963 * data in descriptor format, without even looking at the 964 * RESPONSE CODE field in the returned sense data (to see which 965 * format the returned sense data is in), we are stuck with 966 * being bug compatible with older kernels. 967 */ 968 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 969 } 970 } 971 972 /** 973 * ata_gen_ata_sense - generate a SCSI fixed sense block 974 * @qc: Command that we are erroring out 975 * 976 * Generate sense block for a failed ATA command @qc. 977 * 978 * LOCKING: 979 * None. 980 */ 981 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 982 { 983 struct ata_device *dev = qc->dev; 984 struct scsi_cmnd *cmd = qc->scsicmd; 985 struct ata_taskfile *tf = &qc->result_tf; 986 u8 sense_key, asc, ascq; 987 988 if (ata_dev_disabled(dev)) { 989 /* Device disabled after error recovery */ 990 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 991 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 992 return; 993 } 994 995 if (ata_id_is_locked(dev->id)) { 996 /* Security locked */ 997 /* LOGICAL UNIT ACCESS NOT AUTHORIZED */ 998 ata_scsi_set_sense(dev, cmd, DATA_PROTECT, 0x74, 0x71); 999 return; 1000 } 1001 1002 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 1003 ata_dev_dbg(dev, 1004 "Missing result TF: reporting aborted command\n"); 1005 goto aborted; 1006 } 1007 1008 /* Use ata_to_sense_error() to map status register bits 1009 * onto sense key, asc & ascq. 1010 */ 1011 if (qc->err_mask || 1012 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1013 ata_to_sense_error(tf->status, tf->error, 1014 &sense_key, &asc, &ascq); 1015 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1016 return; 1017 } 1018 1019 /* Could not decode error */ 1020 ata_dev_warn(dev, 1021 "Could not decode error 0x%x, status 0x%x (err_mask=0x%x)\n", 1022 tf->error, tf->status, qc->err_mask); 1023 aborted: 1024 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1025 } 1026 1027 void ata_scsi_sdev_config(struct scsi_device *sdev) 1028 { 1029 sdev->use_10_for_rw = 1; 1030 sdev->use_10_for_ms = 1; 1031 sdev->no_write_same = 1; 1032 1033 /* Schedule policy is determined by ->qc_defer() callback and 1034 * it needs to see every deferred qc. Set dev_blocked to 1 to 1035 * prevent SCSI midlayer from automatically deferring 1036 * requests. 1037 */ 1038 sdev->max_device_blocked = 1; 1039 } 1040 1041 /** 1042 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1043 * @rq: request to be checked 1044 * 1045 * ATAPI commands which transfer variable length data to host 1046 * might overflow due to application error or hardware bug. This 1047 * function checks whether overflow should be drained and ignored 1048 * for @request. 1049 * 1050 * LOCKING: 1051 * None. 1052 * 1053 * RETURNS: 1054 * 1 if ; otherwise, 0. 1055 */ 1056 bool ata_scsi_dma_need_drain(struct request *rq) 1057 { 1058 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1059 1060 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1061 } 1062 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1063 1064 int ata_scsi_dev_config(struct scsi_device *sdev, struct queue_limits *lim, 1065 struct ata_device *dev) 1066 { 1067 int depth = 1; 1068 1069 if (!ata_id_has_unload(dev->id)) 1070 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1071 1072 /* configure max sectors */ 1073 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1074 lim->max_hw_sectors = dev->max_sectors; 1075 1076 if (dev->class == ATA_DEV_ATAPI) { 1077 sdev->sector_size = ATA_SECT_SIZE; 1078 1079 /* set DMA padding */ 1080 lim->dma_pad_mask = ATA_DMA_PAD_SZ - 1; 1081 1082 /* make room for appending the drain */ 1083 lim->max_segments--; 1084 1085 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1086 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1087 if (!sdev->dma_drain_buf) { 1088 ata_dev_err(dev, "drain buffer allocation failed\n"); 1089 return -ENOMEM; 1090 } 1091 } else { 1092 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1093 1094 /* 1095 * Ask the sd driver to issue START STOP UNIT on runtime suspend 1096 * and resume and shutdown only. For system level suspend/resume, 1097 * devices power state is handled directly by libata EH. 1098 * Given that disks are always spun up on system resume, also 1099 * make sure that the sd driver forces runtime suspended disks 1100 * to be resumed to correctly reflect the power state of the 1101 * device. 1102 */ 1103 sdev->manage_runtime_start_stop = 1; 1104 sdev->manage_shutdown = 1; 1105 sdev->manage_restart = ata_acpi_dev_manage_restart(dev); 1106 sdev->force_runtime_start_on_system_start = 1; 1107 } 1108 1109 /* 1110 * ata_pio_sectors() expects buffer for each sector to not cross 1111 * page boundary. Enforce it by requiring buffers to be sector 1112 * aligned, which works iff sector_size is not larger than 1113 * PAGE_SIZE. ATAPI devices also need the alignment as 1114 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1115 */ 1116 if (sdev->sector_size > PAGE_SIZE) 1117 ata_dev_warn(dev, 1118 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1119 sdev->sector_size); 1120 1121 lim->dma_alignment = sdev->sector_size - 1; 1122 1123 if (dev->flags & ATA_DFLAG_AN) 1124 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1125 1126 if (ata_ncq_supported(dev)) 1127 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1128 depth = min(ATA_MAX_QUEUE, depth); 1129 scsi_change_queue_depth(sdev, depth); 1130 1131 if (dev->flags & ATA_DFLAG_TRUSTED) 1132 sdev->security_supported = 1; 1133 1134 dev->sdev = sdev; 1135 return 0; 1136 } 1137 1138 /** 1139 * ata_scsi_sdev_init - Early setup of SCSI device 1140 * @sdev: SCSI device to examine 1141 * 1142 * This is called from scsi_alloc_sdev() when the scsi device 1143 * associated with an ATA device is scanned on a port. 1144 * 1145 * LOCKING: 1146 * Defined by SCSI layer. We don't really care. 1147 */ 1148 1149 int ata_scsi_sdev_init(struct scsi_device *sdev) 1150 { 1151 struct ata_port *ap = ata_shost_to_port(sdev->host); 1152 struct device_link *link; 1153 1154 ata_scsi_sdev_config(sdev); 1155 1156 /* 1157 * Create a link from the ata_port device to the scsi device to ensure 1158 * that PM does suspend/resume in the correct order: the scsi device is 1159 * consumer (child) and the ata port the supplier (parent). 1160 */ 1161 link = device_link_add(&sdev->sdev_gendev, &ap->tdev, 1162 DL_FLAG_STATELESS | 1163 DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); 1164 if (!link) { 1165 ata_port_err(ap, "Failed to create link to scsi device %s\n", 1166 dev_name(&sdev->sdev_gendev)); 1167 return -ENODEV; 1168 } 1169 1170 return 0; 1171 } 1172 EXPORT_SYMBOL_GPL(ata_scsi_sdev_init); 1173 1174 /** 1175 * ata_scsi_sdev_configure - Set SCSI device attributes 1176 * @sdev: SCSI device to examine 1177 * @lim: queue limits 1178 * 1179 * This is called before we actually start reading 1180 * and writing to the device, to configure certain 1181 * SCSI mid-layer behaviors. 1182 * 1183 * LOCKING: 1184 * Defined by SCSI layer. We don't really care. 1185 */ 1186 1187 int ata_scsi_sdev_configure(struct scsi_device *sdev, struct queue_limits *lim) 1188 { 1189 struct ata_port *ap = ata_shost_to_port(sdev->host); 1190 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1191 1192 if (dev) 1193 return ata_scsi_dev_config(sdev, lim, dev); 1194 1195 return 0; 1196 } 1197 EXPORT_SYMBOL_GPL(ata_scsi_sdev_configure); 1198 1199 /** 1200 * ata_scsi_sdev_destroy - SCSI device is about to be destroyed 1201 * @sdev: SCSI device to be destroyed 1202 * 1203 * @sdev is about to be destroyed for hot/warm unplugging. If 1204 * this unplugging was initiated by libata as indicated by NULL 1205 * dev->sdev, this function doesn't have to do anything. 1206 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1207 * Clear dev->sdev, schedule the device for ATA detach and invoke 1208 * EH. 1209 * 1210 * LOCKING: 1211 * Defined by SCSI layer. We don't really care. 1212 */ 1213 void ata_scsi_sdev_destroy(struct scsi_device *sdev) 1214 { 1215 struct ata_port *ap = ata_shost_to_port(sdev->host); 1216 unsigned long flags; 1217 struct ata_device *dev; 1218 1219 device_link_remove(&sdev->sdev_gendev, &ap->tdev); 1220 1221 spin_lock_irqsave(ap->lock, flags); 1222 dev = __ata_scsi_find_dev(ap, sdev); 1223 if (dev && dev->sdev) { 1224 /* SCSI device already in CANCEL state, no need to offline it */ 1225 dev->sdev = NULL; 1226 dev->flags |= ATA_DFLAG_DETACH; 1227 ata_port_schedule_eh(ap); 1228 } 1229 spin_unlock_irqrestore(ap->lock, flags); 1230 1231 kfree(sdev->dma_drain_buf); 1232 } 1233 EXPORT_SYMBOL_GPL(ata_scsi_sdev_destroy); 1234 1235 /** 1236 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1237 * @qc: Storage for translated ATA taskfile 1238 * 1239 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1240 * (to start). Perhaps these commands should be preceded by 1241 * CHECK POWER MODE to see what power mode the device is already in. 1242 * [See SAT revision 5 at www.t10.org] 1243 * 1244 * LOCKING: 1245 * spin_lock_irqsave(host lock) 1246 * 1247 * RETURNS: 1248 * Zero on success, non-zero on error. 1249 */ 1250 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1251 { 1252 struct scsi_cmnd *scmd = qc->scsicmd; 1253 const u8 *cdb = scmd->cmnd; 1254 u16 fp; 1255 u8 bp = 0xff; 1256 1257 if (scmd->cmd_len < 5) { 1258 fp = 4; 1259 goto invalid_fld; 1260 } 1261 1262 /* LOEJ bit set not supported */ 1263 if (cdb[4] & 0x2) { 1264 fp = 4; 1265 bp = 1; 1266 goto invalid_fld; 1267 } 1268 1269 /* Power conditions not supported */ 1270 if (((cdb[4] >> 4) & 0xf) != 0) { 1271 fp = 4; 1272 bp = 3; 1273 goto invalid_fld; 1274 } 1275 1276 /* Ignore IMMED bit (cdb[1] & 0x1), violates sat-r05 */ 1277 if (!ata_dev_power_init_tf(qc->dev, &qc->tf, cdb[4] & 0x1)) { 1278 ata_scsi_set_sense(qc->dev, scmd, ABORTED_COMMAND, 0, 0); 1279 return 1; 1280 } 1281 1282 /* 1283 * Standby and Idle condition timers could be implemented but that 1284 * would require libata to implement the Power condition mode page 1285 * and allow the user to change it. Changing mode pages requires 1286 * MODE SELECT to be implemented. 1287 */ 1288 1289 return 0; 1290 1291 invalid_fld: 1292 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1293 return 1; 1294 } 1295 1296 /** 1297 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1298 * @qc: Storage for translated ATA taskfile 1299 * 1300 * Sets up an ATA taskfile to issue FLUSH CACHE or 1301 * FLUSH CACHE EXT. 1302 * 1303 * LOCKING: 1304 * spin_lock_irqsave(host lock) 1305 * 1306 * RETURNS: 1307 * Zero on success, non-zero on error. 1308 */ 1309 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1310 { 1311 struct ata_taskfile *tf = &qc->tf; 1312 1313 tf->flags |= ATA_TFLAG_DEVICE; 1314 tf->protocol = ATA_PROT_NODATA; 1315 1316 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1317 tf->command = ATA_CMD_FLUSH_EXT; 1318 else 1319 tf->command = ATA_CMD_FLUSH; 1320 1321 /* flush is critical for IO integrity, consider it an IO command */ 1322 qc->flags |= ATA_QCFLAG_IO; 1323 1324 return 0; 1325 } 1326 1327 /** 1328 * scsi_6_lba_len - Get LBA and transfer length 1329 * @cdb: SCSI command to translate 1330 * 1331 * Calculate LBA and transfer length for 6-byte commands. 1332 * 1333 * RETURNS: 1334 * @plba: the LBA 1335 * @plen: the transfer length 1336 */ 1337 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1338 { 1339 *plba = get_unaligned_be24(&cdb[1]) & 0x1fffff; 1340 *plen = cdb[4]; 1341 } 1342 1343 /** 1344 * scsi_10_lba_len - Get LBA and transfer length 1345 * @cdb: SCSI command to translate 1346 * 1347 * Calculate LBA and transfer length for 10-byte commands. 1348 * 1349 * RETURNS: 1350 * @plba: the LBA 1351 * @plen: the transfer length 1352 */ 1353 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1354 { 1355 *plba = get_unaligned_be32(&cdb[2]); 1356 *plen = get_unaligned_be16(&cdb[7]); 1357 } 1358 1359 /** 1360 * scsi_16_lba_len - Get LBA and transfer length 1361 * @cdb: SCSI command to translate 1362 * 1363 * Calculate LBA and transfer length for 16-byte commands. 1364 * 1365 * RETURNS: 1366 * @plba: the LBA 1367 * @plen: the transfer length 1368 */ 1369 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1370 { 1371 *plba = get_unaligned_be64(&cdb[2]); 1372 *plen = get_unaligned_be32(&cdb[10]); 1373 } 1374 1375 /** 1376 * scsi_dld - Get duration limit descriptor index 1377 * @cdb: SCSI command to translate 1378 * 1379 * Returns the dld bits indicating the index of a command duration limit 1380 * descriptor. 1381 */ 1382 static inline int scsi_dld(const u8 *cdb) 1383 { 1384 return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03); 1385 } 1386 1387 /** 1388 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1389 * @qc: Storage for translated ATA taskfile 1390 * 1391 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1392 * 1393 * LOCKING: 1394 * spin_lock_irqsave(host lock) 1395 * 1396 * RETURNS: 1397 * Zero on success, non-zero on error. 1398 */ 1399 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1400 { 1401 struct scsi_cmnd *scmd = qc->scsicmd; 1402 struct ata_taskfile *tf = &qc->tf; 1403 struct ata_device *dev = qc->dev; 1404 u64 dev_sectors = qc->dev->n_sectors; 1405 const u8 *cdb = scmd->cmnd; 1406 u64 block; 1407 u32 n_block; 1408 u16 fp; 1409 1410 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1411 tf->protocol = ATA_PROT_NODATA; 1412 1413 switch (cdb[0]) { 1414 case VERIFY: 1415 if (scmd->cmd_len < 10) { 1416 fp = 9; 1417 goto invalid_fld; 1418 } 1419 scsi_10_lba_len(cdb, &block, &n_block); 1420 break; 1421 case VERIFY_16: 1422 if (scmd->cmd_len < 16) { 1423 fp = 15; 1424 goto invalid_fld; 1425 } 1426 scsi_16_lba_len(cdb, &block, &n_block); 1427 break; 1428 default: 1429 fp = 0; 1430 goto invalid_fld; 1431 } 1432 1433 if (!n_block) 1434 goto nothing_to_do; 1435 if (block >= dev_sectors) 1436 goto out_of_range; 1437 if ((block + n_block) > dev_sectors) 1438 goto out_of_range; 1439 1440 if (dev->flags & ATA_DFLAG_LBA) { 1441 tf->flags |= ATA_TFLAG_LBA; 1442 1443 if (lba_28_ok(block, n_block)) { 1444 /* use LBA28 */ 1445 tf->command = ATA_CMD_VERIFY; 1446 tf->device |= (block >> 24) & 0xf; 1447 } else if (lba_48_ok(block, n_block)) { 1448 if (!(dev->flags & ATA_DFLAG_LBA48)) 1449 goto out_of_range; 1450 1451 /* use LBA48 */ 1452 tf->flags |= ATA_TFLAG_LBA48; 1453 tf->command = ATA_CMD_VERIFY_EXT; 1454 1455 tf->hob_nsect = (n_block >> 8) & 0xff; 1456 1457 tf->hob_lbah = (block >> 40) & 0xff; 1458 tf->hob_lbam = (block >> 32) & 0xff; 1459 tf->hob_lbal = (block >> 24) & 0xff; 1460 } else 1461 /* request too large even for LBA48 */ 1462 goto out_of_range; 1463 1464 tf->nsect = n_block & 0xff; 1465 1466 tf->lbah = (block >> 16) & 0xff; 1467 tf->lbam = (block >> 8) & 0xff; 1468 tf->lbal = block & 0xff; 1469 1470 tf->device |= ATA_LBA; 1471 } else { 1472 /* CHS */ 1473 u32 sect, head, cyl, track; 1474 1475 if (!lba_28_ok(block, n_block)) 1476 goto out_of_range; 1477 1478 /* Convert LBA to CHS */ 1479 track = (u32)block / dev->sectors; 1480 cyl = track / dev->heads; 1481 head = track % dev->heads; 1482 sect = (u32)block % dev->sectors + 1; 1483 1484 /* Check whether the converted CHS can fit. 1485 Cylinder: 0-65535 1486 Head: 0-15 1487 Sector: 1-255*/ 1488 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1489 goto out_of_range; 1490 1491 tf->command = ATA_CMD_VERIFY; 1492 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1493 tf->lbal = sect; 1494 tf->lbam = cyl; 1495 tf->lbah = cyl >> 8; 1496 tf->device |= head; 1497 } 1498 1499 return 0; 1500 1501 invalid_fld: 1502 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1503 return 1; 1504 1505 out_of_range: 1506 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1507 /* "Logical Block Address out of range" */ 1508 return 1; 1509 1510 nothing_to_do: 1511 scmd->result = SAM_STAT_GOOD; 1512 return 1; 1513 } 1514 1515 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1516 { 1517 struct request *rq = scsi_cmd_to_rq(scmd); 1518 u32 req_blocks; 1519 1520 if (!blk_rq_is_passthrough(rq)) 1521 return true; 1522 1523 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1524 if (n_blocks > req_blocks) 1525 return false; 1526 1527 return true; 1528 } 1529 1530 /** 1531 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1532 * @qc: Storage for translated ATA taskfile 1533 * 1534 * Converts any of six SCSI read/write commands into the 1535 * ATA counterpart, including starting sector (LBA), 1536 * sector count, and taking into account the device's LBA48 1537 * support. 1538 * 1539 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1540 * %WRITE_16 are currently supported. 1541 * 1542 * LOCKING: 1543 * spin_lock_irqsave(host lock) 1544 * 1545 * RETURNS: 1546 * Zero on success, non-zero on error. 1547 */ 1548 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1549 { 1550 struct scsi_cmnd *scmd = qc->scsicmd; 1551 const u8 *cdb = scmd->cmnd; 1552 struct request *rq = scsi_cmd_to_rq(scmd); 1553 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1554 unsigned int tf_flags = 0; 1555 int dld = 0; 1556 u64 block; 1557 u32 n_block; 1558 int rc; 1559 u16 fp = 0; 1560 1561 switch (cdb[0]) { 1562 case WRITE_6: 1563 case WRITE_10: 1564 case WRITE_16: 1565 tf_flags |= ATA_TFLAG_WRITE; 1566 break; 1567 } 1568 1569 /* Calculate the SCSI LBA, transfer length and FUA. */ 1570 switch (cdb[0]) { 1571 case READ_10: 1572 case WRITE_10: 1573 if (unlikely(scmd->cmd_len < 10)) { 1574 fp = 9; 1575 goto invalid_fld; 1576 } 1577 scsi_10_lba_len(cdb, &block, &n_block); 1578 if (cdb[1] & (1 << 3)) 1579 tf_flags |= ATA_TFLAG_FUA; 1580 if (!ata_check_nblocks(scmd, n_block)) 1581 goto invalid_fld; 1582 break; 1583 case READ_6: 1584 case WRITE_6: 1585 if (unlikely(scmd->cmd_len < 6)) { 1586 fp = 5; 1587 goto invalid_fld; 1588 } 1589 scsi_6_lba_len(cdb, &block, &n_block); 1590 1591 /* for 6-byte r/w commands, transfer length 0 1592 * means 256 blocks of data, not 0 block. 1593 */ 1594 if (!n_block) 1595 n_block = 256; 1596 if (!ata_check_nblocks(scmd, n_block)) 1597 goto invalid_fld; 1598 break; 1599 case READ_16: 1600 case WRITE_16: 1601 if (unlikely(scmd->cmd_len < 16)) { 1602 fp = 15; 1603 goto invalid_fld; 1604 } 1605 scsi_16_lba_len(cdb, &block, &n_block); 1606 dld = scsi_dld(cdb); 1607 if (cdb[1] & (1 << 3)) 1608 tf_flags |= ATA_TFLAG_FUA; 1609 if (!ata_check_nblocks(scmd, n_block)) 1610 goto invalid_fld; 1611 break; 1612 default: 1613 fp = 0; 1614 goto invalid_fld; 1615 } 1616 1617 /* Check and compose ATA command */ 1618 if (!n_block) 1619 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1620 * length 0 means transfer 0 block of data. 1621 * However, for ATA R/W commands, sector count 0 means 1622 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1623 * 1624 * WARNING: one or two older ATA drives treat 0 as 0... 1625 */ 1626 goto nothing_to_do; 1627 1628 qc->flags |= ATA_QCFLAG_IO; 1629 qc->nbytes = n_block * scmd->device->sector_size; 1630 1631 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class); 1632 if (likely(rc == 0)) 1633 return 0; 1634 1635 if (rc == -ERANGE) 1636 goto out_of_range; 1637 /* treat all other errors as -EINVAL, fall through */ 1638 invalid_fld: 1639 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1640 return 1; 1641 1642 out_of_range: 1643 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1644 /* "Logical Block Address out of range" */ 1645 return 1; 1646 1647 nothing_to_do: 1648 scmd->result = SAM_STAT_GOOD; 1649 return 1; 1650 } 1651 1652 static void ata_scsi_qc_done(struct ata_queued_cmd *qc, bool set_result, 1653 u32 scmd_result) 1654 { 1655 struct scsi_cmnd *cmd = qc->scsicmd; 1656 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1657 1658 ata_qc_free(qc); 1659 1660 if (set_result) 1661 cmd->result = scmd_result; 1662 done(cmd); 1663 } 1664 1665 void ata_scsi_deferred_qc_work(struct work_struct *work) 1666 { 1667 struct ata_link *link = 1668 container_of(work, struct ata_link, deferred_qc_work); 1669 struct ata_port *ap = link->ap; 1670 struct ata_queued_cmd *qc; 1671 unsigned long flags; 1672 1673 spin_lock_irqsave(ap->lock, flags); 1674 1675 /* 1676 * If we still have a deferred qc and we are not in EH, issue it. In 1677 * such case, we should not need any more deferring the qc, so warn if 1678 * qc_defer() says otherwise. 1679 */ 1680 qc = link->deferred_qc; 1681 if (qc && !ata_port_eh_scheduled(ap)) { 1682 WARN_ON_ONCE(ap->ops->qc_defer(qc)); 1683 link->deferred_qc = NULL; 1684 ata_qc_issue(qc); 1685 } 1686 1687 spin_unlock_irqrestore(ap->lock, flags); 1688 } 1689 1690 void ata_scsi_requeue_deferred_qc(struct ata_port *ap) 1691 { 1692 struct ata_link *link; 1693 1694 lockdep_assert_held(ap->lock); 1695 1696 /* 1697 * If we have a deferred qc when a reset occurs or NCQ commands fail, 1698 * do not try to be smart about what to do with this deferred command 1699 * and simply requeue it by completing it with DID_REQUEUE. 1700 */ 1701 ata_for_each_link(link, ap, PMP_FIRST) { 1702 struct ata_queued_cmd *qc = link->deferred_qc; 1703 1704 if (qc) { 1705 link->deferred_qc = NULL; 1706 cancel_work(&link->deferred_qc_work); 1707 ata_scsi_qc_done(qc, true, DID_REQUEUE << 16); 1708 } 1709 } 1710 } 1711 1712 static void ata_scsi_schedule_deferred_qc(struct ata_link *link) 1713 { 1714 struct ata_queued_cmd *qc = link->deferred_qc; 1715 struct ata_port *ap = link->ap; 1716 1717 lockdep_assert_held(ap->lock); 1718 1719 /* 1720 * If we have a deferred qc, then qc_defer() is defined and we can use 1721 * this callback to determine if this qc is good to go, unless EH has 1722 * been scheduled. 1723 */ 1724 if (!qc) 1725 return; 1726 1727 if (ata_port_eh_scheduled(ap)) { 1728 ata_scsi_requeue_deferred_qc(ap); 1729 return; 1730 } 1731 if (!ap->ops->qc_defer(qc)) 1732 queue_work(system_highpri_wq, &link->deferred_qc_work); 1733 } 1734 1735 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1736 { 1737 struct ata_link *link = qc->dev->link; 1738 struct scsi_cmnd *cmd = qc->scsicmd; 1739 u8 *cdb = cmd->cmnd; 1740 bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID; 1741 bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12; 1742 bool is_ck_cond_request = cdb[2] & 0x20; 1743 bool is_error = qc->err_mask != 0; 1744 1745 /* For ATA pass thru (SAT) commands, generate a sense block if 1746 * user mandated it or if there's an error. Note that if we 1747 * generate because the user forced us to [CK_COND=1], a check 1748 * condition is generated and the ATA register values are returned 1749 * whether the command completed successfully or not. If there 1750 * was no error, and CK_COND=1, we use the following sense data: 1751 * sk = RECOVERED ERROR 1752 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1753 */ 1754 if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) { 1755 if (!have_sense) 1756 ata_gen_passthru_sense(qc); 1757 ata_scsi_set_passthru_sense_fields(qc); 1758 if (is_ck_cond_request) 1759 set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); 1760 } else if (is_error) { 1761 if (!have_sense) 1762 ata_gen_ata_sense(qc); 1763 ata_scsi_set_sense_information(qc); 1764 } 1765 1766 ata_scsi_qc_done(qc, false, 0); 1767 1768 ata_scsi_schedule_deferred_qc(link); 1769 } 1770 1771 static int ata_scsi_qc_issue(struct ata_port *ap, struct ata_queued_cmd *qc) 1772 { 1773 struct ata_link *link = qc->dev->link; 1774 int ret; 1775 1776 if (!ap->ops->qc_defer) 1777 goto issue_qc; 1778 1779 /* 1780 * If we already have a deferred qc, then rely on the SCSI layer to 1781 * requeue and defer all incoming commands until the deferred qc is 1782 * processed, once all on-going commands complete. 1783 */ 1784 if (link->deferred_qc) { 1785 ata_qc_free(qc); 1786 return SCSI_MLQUEUE_DEVICE_BUSY; 1787 } 1788 1789 /* Check if the command needs to be deferred. */ 1790 ret = ap->ops->qc_defer(qc); 1791 switch (ret) { 1792 case 0: 1793 break; 1794 case ATA_DEFER_LINK: 1795 ret = SCSI_MLQUEUE_DEVICE_BUSY; 1796 goto defer_qc; 1797 case ATA_DEFER_LINK_EXCL: 1798 /* 1799 * Drivers making use of ap->excl_link cannot store the QC in 1800 * link->deferred_qc, because the ap->excl_link handling is 1801 * incompatible with the link->deferred_qc workqueue handling. 1802 */ 1803 ret = SCSI_MLQUEUE_DEVICE_BUSY; 1804 goto free_qc; 1805 case ATA_DEFER_PORT: 1806 ret = SCSI_MLQUEUE_HOST_BUSY; 1807 goto free_qc; 1808 default: 1809 WARN_ON_ONCE(1); 1810 ret = SCSI_MLQUEUE_HOST_BUSY; 1811 goto free_qc; 1812 } 1813 1814 issue_qc: 1815 ata_qc_issue(qc); 1816 return 0; 1817 1818 defer_qc: 1819 /* 1820 * We must defer this qc: if this is not an NCQ command, keep 1821 * this qc as a deferred one and report to the SCSI layer that 1822 * we issued it so that it is not requeued. The deferred qc will 1823 * be issued with the port deferred_qc_work once all on-going 1824 * commands complete. 1825 */ 1826 if (!ata_is_ncq(qc->tf.protocol)) { 1827 link->deferred_qc = qc; 1828 return 0; 1829 } 1830 1831 free_qc: 1832 /* Force a requeue of the command to defer its execution. */ 1833 ata_qc_free(qc); 1834 1835 return ret; 1836 } 1837 1838 /** 1839 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1840 * @dev: ATA device to which the command is addressed 1841 * @cmd: SCSI command to execute 1842 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1843 * 1844 * Our ->queuecommand() function has decided that the SCSI 1845 * command issued can be directly translated into an ATA 1846 * command, rather than handled internally. 1847 * 1848 * This function sets up an ata_queued_cmd structure for the 1849 * SCSI command, and sends that ata_queued_cmd to the hardware. 1850 * 1851 * The xlat_func argument (actor) returns 0 if ready to execute 1852 * ATA command, else 1 to finish translation. If 1 is returned 1853 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1854 * to be set reflecting an error condition or clean (early) 1855 * termination. 1856 * 1857 * LOCKING: 1858 * spin_lock_irqsave(host lock) 1859 * 1860 * RETURNS: 1861 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY or SCSI_MLQUEUE_HOST_BUSY if the 1862 * command needs to be deferred. 1863 */ 1864 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1865 ata_xlat_func_t xlat_func) 1866 { 1867 struct ata_port *ap = dev->link->ap; 1868 struct ata_queued_cmd *qc; 1869 1870 lockdep_assert_held(ap->lock); 1871 1872 /* 1873 * ata_scsi_qc_new() calls scsi_done(cmd) in case of failure. So we 1874 * have nothing further to do when allocating a qc fails. 1875 */ 1876 qc = ata_scsi_qc_new(dev, cmd); 1877 if (!qc) 1878 return 0; 1879 1880 /* data is present; dma-map it */ 1881 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1882 cmd->sc_data_direction == DMA_TO_DEVICE) { 1883 if (unlikely(scsi_bufflen(cmd) < 1)) { 1884 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1885 cmd->result = (DID_ERROR << 16); 1886 goto done; 1887 } 1888 1889 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1890 qc->dma_dir = cmd->sc_data_direction; 1891 } 1892 1893 qc->complete_fn = ata_scsi_qc_complete; 1894 1895 if (xlat_func(qc)) 1896 goto done; 1897 1898 return ata_scsi_qc_issue(ap, qc); 1899 1900 done: 1901 ata_qc_free(qc); 1902 scsi_done(cmd); 1903 return 0; 1904 } 1905 1906 /** 1907 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1908 * @dev: Target device. 1909 * @cmd: SCSI command of interest. 1910 * @actor: Callback hook for desired SCSI command simulator 1911 * 1912 * Takes care of the hard work of simulating a SCSI command... 1913 * Mapping the response buffer, calling the command's handler, 1914 * and handling the handler's return value. This return value 1915 * indicates whether the handler wishes the SCSI command to be 1916 * completed successfully (0), or not (in which case cmd->result 1917 * and sense buffer are assumed to be set). 1918 * 1919 * LOCKING: 1920 * spin_lock_irqsave(host lock) 1921 */ 1922 static void ata_scsi_rbuf_fill(struct ata_device *dev, struct scsi_cmnd *cmd, 1923 unsigned int (*actor)(struct ata_device *dev, 1924 struct scsi_cmnd *cmd, u8 *rbuf)) 1925 { 1926 unsigned long flags; 1927 unsigned int len; 1928 1929 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1930 1931 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1932 len = actor(dev, cmd, ata_scsi_rbuf); 1933 if (len) { 1934 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1935 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1936 cmd->result = SAM_STAT_GOOD; 1937 if (scsi_bufflen(cmd) > len) 1938 scsi_set_resid(cmd, scsi_bufflen(cmd) - len); 1939 } 1940 1941 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1942 } 1943 1944 /** 1945 * ata_scsiop_inq_std - Simulate standard INQUIRY command 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 standard device identification data associated 1951 * with non-VPD INQUIRY command output. 1952 * 1953 * LOCKING: 1954 * spin_lock_irqsave(host lock) 1955 */ 1956 static unsigned int ata_scsiop_inq_std(struct ata_device *dev, 1957 struct scsi_cmnd *cmd, u8 *rbuf) 1958 { 1959 static const u8 versions[] = { 1960 0x00, 1961 0x60, /* SAM-3 (no version claimed) */ 1962 1963 0x03, 1964 0x20, /* SBC-2 (no version claimed) */ 1965 1966 0x03, 1967 0x00 /* SPC-3 (no version claimed) */ 1968 }; 1969 static const u8 versions_zbc[] = { 1970 0x00, 1971 0xA0, /* SAM-5 (no version claimed) */ 1972 1973 0x06, 1974 0x00, /* SBC-4 (no version claimed) */ 1975 1976 0x05, 1977 0xC0, /* SPC-5 (no version claimed) */ 1978 1979 0x60, 1980 0x24, /* ZBC r05 */ 1981 }; 1982 1983 u8 hdr[] = { 1984 TYPE_DISK, 1985 0, 1986 0x5, /* claim SPC-3 version compatibility */ 1987 2, 1988 95 - 4, 1989 0, 1990 0, 1991 2 1992 }; 1993 1994 /* 1995 * Set the SCSI Removable Media Bit (RMB) if the ATA removable media 1996 * device bit (obsolete since ATA-8 ACS) is set. 1997 */ 1998 if (ata_id_removable(dev->id)) 1999 hdr[1] |= (1 << 7); 2000 2001 if (dev->class == ATA_DEV_ZAC) { 2002 hdr[0] = TYPE_ZBC; 2003 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 2004 } 2005 2006 if (dev->flags & ATA_DFLAG_CDL) 2007 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 2008 2009 memcpy(rbuf, hdr, sizeof(hdr)); 2010 memcpy(&rbuf[8], "ATA ", 8); 2011 ata_id_string(dev->id, &rbuf[16], ATA_ID_PROD, 16); 2012 2013 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2014 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2015 if (strncmp(&rbuf[32], " ", 4) == 0) 2016 ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV, 4); 2017 2018 if (rbuf[32] == 0 || rbuf[32] == ' ') 2019 memcpy(&rbuf[32], "n/a ", 4); 2020 2021 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 2022 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2023 else 2024 memcpy(rbuf + 58, versions, sizeof(versions)); 2025 2026 /* 2027 * Include all 8 possible version descriptors, even if not all of 2028 * them are popoulated. 2029 */ 2030 return 96; 2031 } 2032 2033 /** 2034 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2035 * @dev: Target device. 2036 * @cmd: SCSI command of interest. 2037 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2038 * 2039 * Returns list of inquiry VPD pages available. 2040 * 2041 * LOCKING: 2042 * spin_lock_irqsave(host lock) 2043 */ 2044 static unsigned int ata_scsiop_inq_00(struct ata_device *dev, 2045 struct scsi_cmnd *cmd, u8 *rbuf) 2046 { 2047 int i, num_pages = 0; 2048 static const u8 pages[] = { 2049 0x00, /* page 0x00, this page */ 2050 0x80, /* page 0x80, unit serial no page */ 2051 0x83, /* page 0x83, device ident page */ 2052 0x89, /* page 0x89, ata info page */ 2053 0xb0, /* page 0xb0, block limits page */ 2054 0xb1, /* page 0xb1, block device characteristics page */ 2055 0xb2, /* page 0xb2, thin provisioning page */ 2056 0xb6, /* page 0xb6, zoned block device characteristics */ 2057 0xb9, /* page 0xb9, concurrent positioning ranges */ 2058 }; 2059 2060 for (i = 0; i < sizeof(pages); i++) { 2061 if (pages[i] == 0xb6 && !ata_dev_is_zac(dev)) 2062 continue; 2063 rbuf[num_pages + 4] = pages[i]; 2064 num_pages++; 2065 } 2066 rbuf[3] = num_pages; /* number of supported VPD pages */ 2067 2068 return get_unaligned_be16(&rbuf[2]) + 4; 2069 } 2070 2071 /** 2072 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2073 * @dev: Target device. 2074 * @cmd: SCSI command of interest. 2075 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2076 * 2077 * Returns ATA device serial number. 2078 * 2079 * LOCKING: 2080 * spin_lock_irqsave(host lock) 2081 */ 2082 static unsigned int ata_scsiop_inq_80(struct ata_device *dev, 2083 struct scsi_cmnd *cmd, u8 *rbuf) 2084 { 2085 static const u8 hdr[] = { 2086 0, 2087 0x80, /* this page code */ 2088 0, 2089 ATA_ID_SERNO_LEN, /* page len */ 2090 }; 2091 2092 memcpy(rbuf, hdr, sizeof(hdr)); 2093 ata_id_string(dev->id, (unsigned char *) &rbuf[4], 2094 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2095 2096 return get_unaligned_be16(&rbuf[2]) + 4; 2097 } 2098 2099 /** 2100 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2101 * @dev: Target device. 2102 * @cmd: SCSI command of interest. 2103 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2104 * 2105 * Yields two logical unit device identification designators: 2106 * - vendor specific ASCII containing the ATA serial number 2107 * - SAT defined "t10 vendor id based" containing ASCII vendor 2108 * name ("ATA "), model and serial numbers. 2109 * 2110 * LOCKING: 2111 * spin_lock_irqsave(host lock) 2112 */ 2113 static unsigned int ata_scsiop_inq_83(struct ata_device *dev, 2114 struct scsi_cmnd *cmd, u8 *rbuf) 2115 { 2116 const int sat_model_serial_desc_len = 68; 2117 int num; 2118 2119 rbuf[1] = 0x83; /* this page code */ 2120 num = 4; 2121 2122 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2123 rbuf[num + 0] = 2; 2124 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2125 num += 4; 2126 ata_id_string(dev->id, (unsigned char *) rbuf + num, 2127 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2128 num += ATA_ID_SERNO_LEN; 2129 2130 /* SAT defined lu model and serial numbers descriptor */ 2131 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2132 rbuf[num + 0] = 2; 2133 rbuf[num + 1] = 1; 2134 rbuf[num + 3] = sat_model_serial_desc_len; 2135 num += 4; 2136 memcpy(rbuf + num, "ATA ", 8); 2137 num += 8; 2138 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2139 ATA_ID_PROD_LEN); 2140 num += ATA_ID_PROD_LEN; 2141 ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2142 ATA_ID_SERNO_LEN); 2143 num += ATA_ID_SERNO_LEN; 2144 2145 if (ata_id_has_wwn(dev->id)) { 2146 /* SAT defined lu world wide name */ 2147 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2148 rbuf[num + 0] = 1; 2149 rbuf[num + 1] = 3; 2150 rbuf[num + 3] = ATA_ID_WWN_LEN; 2151 num += 4; 2152 ata_id_string(dev->id, (unsigned char *) rbuf + num, 2153 ATA_ID_WWN, ATA_ID_WWN_LEN); 2154 num += ATA_ID_WWN_LEN; 2155 } 2156 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2157 2158 return get_unaligned_be16(&rbuf[2]) + 4; 2159 } 2160 2161 /** 2162 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2163 * @dev: Target device. 2164 * @cmd: SCSI command of interest. 2165 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2166 * 2167 * Yields SAT-specified ATA VPD page. 2168 * 2169 * LOCKING: 2170 * spin_lock_irqsave(host lock) 2171 */ 2172 static unsigned int ata_scsiop_inq_89(struct ata_device *dev, 2173 struct scsi_cmnd *cmd, u8 *rbuf) 2174 { 2175 rbuf[1] = 0x89; /* our page code */ 2176 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2177 rbuf[3] = (0x238 & 0xff); 2178 2179 memcpy(&rbuf[8], "linux ", 8); 2180 memcpy(&rbuf[16], "libata ", 16); 2181 memcpy(&rbuf[32], DRV_VERSION, 4); 2182 2183 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2184 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2185 /* TODO: PMP? */ 2186 2187 /* we don't store the ATA device signature, so we fake it */ 2188 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2189 rbuf[40] = 0x1; 2190 rbuf[48] = 0x1; 2191 2192 rbuf[56] = ATA_CMD_ID_ATA; 2193 2194 memcpy(&rbuf[60], &dev->id[0], 512); 2195 2196 return get_unaligned_be16(&rbuf[2]) + 4; 2197 } 2198 2199 /** 2200 * ata_scsiop_inq_b0 - Simulate INQUIRY VPD page B0, Block Limits 2201 * @dev: Target device. 2202 * @cmd: SCSI command of interest. 2203 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2204 * 2205 * Return data for the VPD page B0h (Block Limits). 2206 * 2207 * LOCKING: 2208 * spin_lock_irqsave(host lock) 2209 */ 2210 static unsigned int ata_scsiop_inq_b0(struct ata_device *dev, 2211 struct scsi_cmnd *cmd, u8 *rbuf) 2212 { 2213 u16 min_io_sectors; 2214 2215 rbuf[1] = 0xb0; 2216 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2217 2218 /* 2219 * Optimal transfer length granularity. 2220 * 2221 * This is always one physical block, but for disks with a smaller 2222 * logical than physical sector size we need to figure out what the 2223 * latter is. 2224 */ 2225 min_io_sectors = 1 << ata_id_log2_per_physical_sector(dev->id); 2226 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2227 2228 /* 2229 * Optimal unmap granularity. 2230 * 2231 * The ATA spec doesn't even know about a granularity or alignment 2232 * for the TRIM command. We can leave away most of the unmap related 2233 * VPD page entries, but we have specifify a granularity to signal 2234 * that we support some form of unmap - in thise case via WRITE SAME 2235 * with the unmap bit set. 2236 */ 2237 if (ata_id_has_trim(dev->id)) { 2238 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2239 2240 if (dev->quirks & ATA_QUIRK_MAX_TRIM_128M) 2241 max_blocks = 128 << (20 - SECTOR_SHIFT); 2242 2243 put_unaligned_be64(max_blocks, &rbuf[36]); 2244 put_unaligned_be32(1, &rbuf[28]); 2245 } 2246 2247 return get_unaligned_be16(&rbuf[2]) + 4; 2248 } 2249 2250 /** 2251 * ata_scsiop_inq_b1 - Simulate INQUIRY VPD page B1, Block Device 2252 * Characteristics 2253 * @dev: Target device. 2254 * @cmd: SCSI command of interest. 2255 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2256 * 2257 * Return data for the VPD page B1h (Block Device Characteristics). 2258 * 2259 * LOCKING: 2260 * spin_lock_irqsave(host lock) 2261 */ 2262 static unsigned int ata_scsiop_inq_b1(struct ata_device *dev, 2263 struct scsi_cmnd *cmd, u8 *rbuf) 2264 { 2265 int form_factor = ata_id_form_factor(dev->id); 2266 int media_rotation_rate = ata_id_rotation_rate(dev->id); 2267 u8 zoned = ata_id_zoned_cap(dev->id); 2268 2269 rbuf[1] = 0xb1; 2270 rbuf[3] = 0x3c; 2271 rbuf[4] = media_rotation_rate >> 8; 2272 rbuf[5] = media_rotation_rate; 2273 rbuf[7] = form_factor; 2274 if (zoned) 2275 rbuf[8] = (zoned << 4); 2276 2277 return get_unaligned_be16(&rbuf[2]) + 4; 2278 } 2279 2280 /** 2281 * ata_scsiop_inq_b2 - Simulate INQUIRY VPD page B2, Logical Block 2282 * Provisioning 2283 * @dev: Target device. 2284 * @cmd: SCSI command of interest. 2285 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2286 * 2287 * Return data for the VPD page B2h (Logical Block Provisioning). 2288 * 2289 * LOCKING: 2290 * spin_lock_irqsave(host lock) 2291 */ 2292 static unsigned int ata_scsiop_inq_b2(struct ata_device *dev, 2293 struct scsi_cmnd *cmd, u8 *rbuf) 2294 { 2295 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2296 rbuf[1] = 0xb2; 2297 rbuf[3] = 0x4; 2298 rbuf[5] = 1 << 6; /* TPWS */ 2299 2300 return get_unaligned_be16(&rbuf[2]) + 4; 2301 } 2302 2303 /** 2304 * ata_scsiop_inq_b6 - Simulate INQUIRY VPD page B6, Zoned Block Device 2305 * Characteristics 2306 * @dev: Target device. 2307 * @cmd: SCSI command of interest. 2308 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2309 * 2310 * Return data for the VPD page B2h (Zoned Block Device Characteristics). 2311 * 2312 * LOCKING: 2313 * spin_lock_irqsave(host lock) 2314 */ 2315 static unsigned int ata_scsiop_inq_b6(struct ata_device *dev, 2316 struct scsi_cmnd *cmd, u8 *rbuf) 2317 { 2318 if (!ata_dev_is_zac(dev)) { 2319 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2320 return 0; 2321 } 2322 2323 /* 2324 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2325 */ 2326 rbuf[1] = 0xb6; 2327 rbuf[3] = 0x3C; 2328 2329 /* 2330 * URSWRZ bit is only meaningful for host-managed ZAC drives 2331 */ 2332 if (dev->zac_zoned_cap & 1) 2333 rbuf[4] |= 1; 2334 put_unaligned_be32(dev->zac_zones_optimal_open, &rbuf[8]); 2335 put_unaligned_be32(dev->zac_zones_optimal_nonseq, &rbuf[12]); 2336 put_unaligned_be32(dev->zac_zones_max_open, &rbuf[16]); 2337 2338 return get_unaligned_be16(&rbuf[2]) + 4; 2339 } 2340 2341 /** 2342 * ata_scsiop_inq_b9 - Simulate INQUIRY VPD page B9, Concurrent Positioning 2343 * Ranges 2344 * @dev: Target device. 2345 * @cmd: SCSI command of interest. 2346 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2347 * 2348 * Return data for the VPD page B9h (Concurrent Positioning Ranges). 2349 * 2350 * LOCKING: 2351 * spin_lock_irqsave(host lock) 2352 */ 2353 static unsigned int ata_scsiop_inq_b9(struct ata_device *dev, 2354 struct scsi_cmnd *cmd, u8 *rbuf) 2355 { 2356 struct ata_cpr_log *cpr_log = dev->cpr_log; 2357 u8 *desc = &rbuf[64]; 2358 int i; 2359 2360 if (!cpr_log) { 2361 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2362 return 0; 2363 } 2364 2365 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2366 rbuf[1] = 0xb9; 2367 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2368 2369 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2370 desc[0] = cpr_log->cpr[i].num; 2371 desc[1] = cpr_log->cpr[i].num_storage_elements; 2372 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2373 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2374 } 2375 2376 return get_unaligned_be16(&rbuf[2]) + 4; 2377 } 2378 2379 /** 2380 * ata_scsiop_inquiry - Simulate INQUIRY command 2381 * @dev: Target device. 2382 * @cmd: SCSI command of interest. 2383 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2384 * 2385 * Returns data associated with an INQUIRY command output. 2386 * 2387 * LOCKING: 2388 * spin_lock_irqsave(host lock) 2389 */ 2390 static unsigned int ata_scsiop_inquiry(struct ata_device *dev, 2391 struct scsi_cmnd *cmd, u8 *rbuf) 2392 { 2393 const u8 *scsicmd = cmd->cmnd; 2394 2395 /* is CmdDt set? */ 2396 if (scsicmd[1] & 2) { 2397 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2398 return 0; 2399 } 2400 2401 /* Is EVPD clear? */ 2402 if ((scsicmd[1] & 1) == 0) 2403 return ata_scsiop_inq_std(dev, cmd, rbuf); 2404 2405 switch (scsicmd[2]) { 2406 case 0x00: 2407 return ata_scsiop_inq_00(dev, cmd, rbuf); 2408 case 0x80: 2409 return ata_scsiop_inq_80(dev, cmd, rbuf); 2410 case 0x83: 2411 return ata_scsiop_inq_83(dev, cmd, rbuf); 2412 case 0x89: 2413 return ata_scsiop_inq_89(dev, cmd, rbuf); 2414 case 0xb0: 2415 return ata_scsiop_inq_b0(dev, cmd, rbuf); 2416 case 0xb1: 2417 return ata_scsiop_inq_b1(dev, cmd, rbuf); 2418 case 0xb2: 2419 return ata_scsiop_inq_b2(dev, cmd, rbuf); 2420 case 0xb6: 2421 return ata_scsiop_inq_b6(dev, cmd, rbuf); 2422 case 0xb9: 2423 return ata_scsiop_inq_b9(dev, cmd, rbuf); 2424 default: 2425 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 2426 return 0; 2427 } 2428 } 2429 2430 /** 2431 * modecpy - Prepare response for MODE SENSE 2432 * @dest: output buffer 2433 * @src: data being copied 2434 * @n: length of mode page 2435 * @changeable: whether changeable parameters are requested 2436 * 2437 * Generate a generic MODE SENSE page for either current or changeable 2438 * parameters. 2439 * 2440 * LOCKING: 2441 * None. 2442 */ 2443 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2444 { 2445 if (changeable) { 2446 memcpy(dest, src, 2); 2447 memset(dest + 2, 0, n - 2); 2448 } else { 2449 memcpy(dest, src, n); 2450 } 2451 } 2452 2453 /** 2454 * ata_msense_caching - Simulate MODE SENSE caching info page 2455 * @id: device IDENTIFY data 2456 * @buf: output buffer 2457 * @changeable: whether changeable parameters are requested 2458 * 2459 * Generate a caching info page, which conditionally indicates 2460 * write caching to the SCSI layer, depending on device 2461 * capabilities. 2462 * 2463 * LOCKING: 2464 * None. 2465 */ 2466 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2467 { 2468 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2469 if (changeable) { 2470 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2471 } else { 2472 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2473 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2474 } 2475 return sizeof(def_cache_mpage); 2476 } 2477 2478 /* 2479 * Simulate MODE SENSE control mode page, sub-page 0. 2480 */ 2481 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2482 bool changeable) 2483 { 2484 modecpy(buf, def_control_mpage, 2485 sizeof(def_control_mpage), changeable); 2486 if (changeable) { 2487 /* ata_mselect_control() */ 2488 buf[2] |= (1 << 2); 2489 } else { 2490 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2491 2492 /* descriptor format sense data */ 2493 buf[2] |= (d_sense << 2); 2494 } 2495 2496 return sizeof(def_control_mpage); 2497 } 2498 2499 /* 2500 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2501 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2502 * only, take care of overflows. 2503 */ 2504 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2505 { 2506 u32 limit = get_unaligned_le32(buf); 2507 2508 return min_t(u32, limit / 10000, 65535); 2509 } 2510 2511 /* 2512 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2513 * (command duration limits T2A and T2B mode pages). 2514 */ 2515 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2516 u8 spg) 2517 { 2518 u8 *b, *cdl, *desc; 2519 u32 policy; 2520 int i; 2521 2522 if (!(dev->flags & ATA_DFLAG_CDL) || !dev->cdl) 2523 return 0; 2524 2525 cdl = dev->cdl->desc_log_buf; 2526 2527 /* 2528 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2529 * are a header. The PAGE LENGTH field is the size of the page 2530 * excluding the header. 2531 */ 2532 buf[0] = CONTROL_MPAGE; 2533 buf[1] = spg; 2534 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2535 if (spg == CDL_T2A_SUB_MPAGE) { 2536 /* 2537 * Read descriptors map to the T2A page: 2538 * set perf_vs_duration_guidleine. 2539 */ 2540 buf[7] = (cdl[0] & 0x03) << 4; 2541 desc = cdl + 64; 2542 } else { 2543 /* Write descriptors map to the T2B page */ 2544 desc = cdl + 288; 2545 } 2546 2547 /* Fill the T2 page descriptors */ 2548 b = &buf[8]; 2549 policy = get_unaligned_le32(&cdl[0]); 2550 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2551 /* t2cdlunits: fixed to 10ms */ 2552 b[0] = 0x0a; 2553 2554 /* Max inactive time and its policy */ 2555 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2556 b[6] = ((policy >> 8) & 0x0f) << 4; 2557 2558 /* Max active time and its policy */ 2559 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2560 b[6] |= (policy >> 4) & 0x0f; 2561 2562 /* Command duration guideline and its policy */ 2563 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2564 b[14] = policy & 0x0f; 2565 } 2566 2567 return CDL_T2_SUB_MPAGE_LEN; 2568 } 2569 2570 /* 2571 * Simulate MODE SENSE control mode page, sub-page f2h 2572 * (ATA feature control mode page). 2573 */ 2574 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2575 u8 *buf) 2576 { 2577 /* PS=0, SPF=1 */ 2578 buf[0] = CONTROL_MPAGE | (1 << 6); 2579 buf[1] = ATA_FEATURE_SUB_MPAGE; 2580 2581 /* 2582 * The first four bytes of ATA Feature Control mode page are a header. 2583 * The PAGE LENGTH field is the size of the page excluding the header. 2584 */ 2585 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2586 2587 if (dev->flags & ATA_DFLAG_CDL_ENABLED) 2588 buf[4] = 0x02; /* T2A and T2B pages enabled */ 2589 else 2590 buf[4] = 0; 2591 2592 return ATA_FEATURE_SUB_MPAGE_LEN; 2593 } 2594 2595 /** 2596 * ata_msense_control - Simulate MODE SENSE control mode page 2597 * @dev: ATA device of interest 2598 * @buf: output buffer 2599 * @spg: sub-page code 2600 * @changeable: whether changeable parameters are requested 2601 * 2602 * Generate a generic MODE SENSE control mode page. 2603 * 2604 * LOCKING: 2605 * None. 2606 */ 2607 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2608 u8 spg, bool changeable) 2609 { 2610 unsigned int n; 2611 2612 switch (spg) { 2613 case 0: 2614 return ata_msense_control_spg0(dev, buf, changeable); 2615 case CDL_T2A_SUB_MPAGE: 2616 case CDL_T2B_SUB_MPAGE: 2617 return ata_msense_control_spgt2(dev, buf, spg); 2618 case ATA_FEATURE_SUB_MPAGE: 2619 return ata_msense_control_ata_feature(dev, buf); 2620 case ALL_SUB_MPAGES: 2621 n = ata_msense_control_spg0(dev, buf, changeable); 2622 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2623 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2B_SUB_MPAGE); 2624 n += ata_msense_control_ata_feature(dev, buf + n); 2625 return n; 2626 default: 2627 return 0; 2628 } 2629 } 2630 2631 /** 2632 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2633 * @buf: output buffer 2634 * @changeable: whether changeable parameters are requested 2635 * 2636 * Generate a generic MODE SENSE r/w error recovery page. 2637 * 2638 * LOCKING: 2639 * None. 2640 */ 2641 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2642 { 2643 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2644 changeable); 2645 return sizeof(def_rw_recovery_mpage); 2646 } 2647 2648 /** 2649 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2650 * @dev: Target device. 2651 * @cmd: SCSI command of interest. 2652 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2653 * 2654 * Simulate MODE SENSE commands. Assume this is invoked for direct 2655 * access devices (e.g. disks) only. There should be no block 2656 * descriptor for other device types. 2657 * 2658 * LOCKING: 2659 * spin_lock_irqsave(host lock) 2660 */ 2661 static unsigned int ata_scsiop_mode_sense(struct ata_device *dev, 2662 struct scsi_cmnd *cmd, u8 *rbuf) 2663 { 2664 u8 *scsicmd = cmd->cmnd, *p = rbuf; 2665 static const u8 sat_blk_desc[] = { 2666 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2667 0, 2668 0, 0x2, 0x0 /* block length: 512 bytes */ 2669 }; 2670 u8 pg, spg; 2671 unsigned int ebd, page_control, six_byte; 2672 u8 dpofua = 0, bp = 0xff; 2673 u16 fp; 2674 2675 six_byte = (scsicmd[0] == MODE_SENSE); 2676 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2677 /* 2678 * LLBA bit in msense(10) ignored (compliant) 2679 */ 2680 2681 page_control = scsicmd[2] >> 6; 2682 switch (page_control) { 2683 case 0: /* current */ 2684 case 1: /* changeable */ 2685 case 2: /* defaults */ 2686 break; /* supported */ 2687 case 3: /* saved */ 2688 goto saving_not_supp; 2689 default: 2690 fp = 2; 2691 bp = 6; 2692 goto invalid_fld; 2693 } 2694 2695 if (six_byte) 2696 p += 4 + (ebd ? 8 : 0); 2697 else 2698 p += 8 + (ebd ? 8 : 0); 2699 2700 pg = scsicmd[2] & 0x3f; 2701 spg = scsicmd[3]; 2702 2703 /* 2704 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2705 * the control page. 2706 */ 2707 if (spg) { 2708 switch (spg) { 2709 case ALL_SUB_MPAGES: 2710 break; 2711 case CDL_T2A_SUB_MPAGE: 2712 case CDL_T2B_SUB_MPAGE: 2713 case ATA_FEATURE_SUB_MPAGE: 2714 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2715 break; 2716 fallthrough; 2717 default: 2718 fp = 3; 2719 goto invalid_fld; 2720 } 2721 } 2722 2723 switch(pg) { 2724 case RW_RECOVERY_MPAGE: 2725 p += ata_msense_rw_recovery(p, page_control == 1); 2726 break; 2727 2728 case CACHE_MPAGE: 2729 p += ata_msense_caching(dev->id, p, page_control == 1); 2730 break; 2731 2732 case CONTROL_MPAGE: 2733 p += ata_msense_control(dev, p, spg, page_control == 1); 2734 break; 2735 2736 case ALL_MPAGES: 2737 p += ata_msense_rw_recovery(p, page_control == 1); 2738 p += ata_msense_caching(dev->id, p, page_control == 1); 2739 p += ata_msense_control(dev, p, spg, page_control == 1); 2740 break; 2741 2742 default: /* invalid page code */ 2743 fp = 2; 2744 goto invalid_fld; 2745 } 2746 2747 if (dev->flags & ATA_DFLAG_FUA) 2748 dpofua = 1 << 4; 2749 2750 if (six_byte) { 2751 rbuf[0] = p - rbuf - 1; 2752 rbuf[2] |= dpofua; 2753 if (ebd) { 2754 rbuf[3] = sizeof(sat_blk_desc); 2755 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2756 } 2757 2758 return rbuf[0] + 1; 2759 } 2760 2761 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2762 rbuf[3] |= dpofua; 2763 if (ebd) { 2764 rbuf[7] = sizeof(sat_blk_desc); 2765 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2766 } 2767 2768 return get_unaligned_be16(&rbuf[0]) + 2; 2769 2770 invalid_fld: 2771 ata_scsi_set_invalid_field(dev, cmd, fp, bp); 2772 return 0; 2773 2774 saving_not_supp: 2775 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2776 /* "Saving parameters not supported" */ 2777 return 0; 2778 } 2779 2780 /** 2781 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2782 * @dev: Target device. 2783 * @cmd: SCSI command of interest. 2784 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2785 * 2786 * Simulate READ CAPACITY commands. 2787 * 2788 * LOCKING: 2789 * None. 2790 */ 2791 static unsigned int ata_scsiop_read_cap(struct ata_device *dev, 2792 struct scsi_cmnd *cmd, u8 *rbuf) 2793 { 2794 u8 *scsicmd = cmd->cmnd; 2795 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2796 u32 sector_size; /* physical sector size in bytes */ 2797 u8 log2_per_phys; 2798 u16 lowest_aligned; 2799 2800 sector_size = ata_id_logical_sector_size(dev->id); 2801 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2802 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2803 2804 if (scsicmd[0] == READ_CAPACITY) { 2805 if (last_lba >= 0xffffffffULL) 2806 last_lba = 0xffffffff; 2807 2808 /* sector count, 32-bit */ 2809 rbuf[0] = last_lba >> (8 * 3); 2810 rbuf[1] = last_lba >> (8 * 2); 2811 rbuf[2] = last_lba >> (8 * 1); 2812 rbuf[3] = last_lba; 2813 2814 /* sector size */ 2815 rbuf[4] = sector_size >> (8 * 3); 2816 rbuf[5] = sector_size >> (8 * 2); 2817 rbuf[6] = sector_size >> (8 * 1); 2818 rbuf[7] = sector_size; 2819 2820 return 8; 2821 } 2822 2823 /* 2824 * READ CAPACITY 16 command is defined as a service action 2825 * (SERVICE_ACTION_IN_16 command). 2826 */ 2827 if (scsicmd[0] != SERVICE_ACTION_IN_16 || 2828 (scsicmd[1] & 0x1f) != SAI_READ_CAPACITY_16) { 2829 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 2830 return 0; 2831 } 2832 2833 /* sector count, 64-bit */ 2834 rbuf[0] = last_lba >> (8 * 7); 2835 rbuf[1] = last_lba >> (8 * 6); 2836 rbuf[2] = last_lba >> (8 * 5); 2837 rbuf[3] = last_lba >> (8 * 4); 2838 rbuf[4] = last_lba >> (8 * 3); 2839 rbuf[5] = last_lba >> (8 * 2); 2840 rbuf[6] = last_lba >> (8 * 1); 2841 rbuf[7] = last_lba; 2842 2843 /* sector size */ 2844 rbuf[ 8] = sector_size >> (8 * 3); 2845 rbuf[ 9] = sector_size >> (8 * 2); 2846 rbuf[10] = sector_size >> (8 * 1); 2847 rbuf[11] = sector_size; 2848 2849 if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) 2850 rbuf[12] = (1 << 4); /* RC_BASIS */ 2851 rbuf[13] = log2_per_phys; 2852 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2853 rbuf[15] = lowest_aligned; 2854 2855 if (ata_id_has_trim(dev->id) && !(dev->quirks & ATA_QUIRK_NOTRIM)) { 2856 rbuf[14] |= 0x80; /* LBPME */ 2857 2858 if (ata_id_has_zero_after_trim(dev->id) && 2859 dev->quirks & ATA_QUIRK_ZERO_AFTER_TRIM) { 2860 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2861 rbuf[14] |= 0x40; /* LBPRZ */ 2862 } 2863 } 2864 2865 return 16; 2866 } 2867 2868 /** 2869 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2870 * @dev: Target device. 2871 * @cmd: SCSI command of interest. 2872 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2873 * 2874 * Simulate REPORT LUNS command. 2875 * 2876 * LOCKING: 2877 * spin_lock_irqsave(host lock) 2878 */ 2879 static unsigned int ata_scsiop_report_luns(struct ata_device *dev, 2880 struct scsi_cmnd *cmd, u8 *rbuf) 2881 { 2882 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2883 2884 return 16; 2885 } 2886 2887 /* 2888 * ATAPI devices typically report zero for their SCSI version, and sometimes 2889 * deviate from the spec WRT response data format. If SCSI version is 2890 * reported as zero like normal, then we make the following fixups: 2891 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2892 * modern device. 2893 * 2) Ensure response data format / ATAPI information are always correct. 2894 */ 2895 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2896 { 2897 u8 buf[4]; 2898 2899 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2900 if (buf[2] == 0) { 2901 buf[2] = 0x5; 2902 buf[3] = 0x32; 2903 } 2904 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2905 } 2906 2907 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2908 { 2909 struct scsi_cmnd *cmd = qc->scsicmd; 2910 unsigned int err_mask = qc->err_mask; 2911 2912 /* handle completion from EH */ 2913 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2914 2915 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2916 ata_gen_passthru_sense(qc); 2917 2918 /* SCSI EH automatically locks door if sdev->locked is 2919 * set. Sometimes door lock request continues to 2920 * fail, for example, when no media is present. This 2921 * creates a loop - SCSI EH issues door lock which 2922 * fails and gets invoked again to acquire sense data 2923 * for the failed command. 2924 * 2925 * If door lock fails, always clear sdev->locked to 2926 * avoid this infinite loop. 2927 * 2928 * This may happen before SCSI scan is complete. Make 2929 * sure qc->dev->sdev isn't NULL before dereferencing. 2930 */ 2931 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2932 qc->dev->sdev->locked = 0; 2933 2934 ata_scsi_qc_done(qc, true, SAM_STAT_CHECK_CONDITION); 2935 return; 2936 } 2937 2938 /* successful completion path */ 2939 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2940 atapi_fixup_inquiry(cmd); 2941 2942 ata_scsi_qc_done(qc, true, SAM_STAT_GOOD); 2943 } 2944 /** 2945 * atapi_xlat - Initialize PACKET taskfile 2946 * @qc: command structure to be initialized 2947 * 2948 * LOCKING: 2949 * spin_lock_irqsave(host lock) 2950 * 2951 * RETURNS: 2952 * Zero on success, non-zero on failure. 2953 */ 2954 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2955 { 2956 struct scsi_cmnd *scmd = qc->scsicmd; 2957 struct ata_device *dev = qc->dev; 2958 int nodata = (scmd->sc_data_direction == DMA_NONE); 2959 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2960 unsigned int nbytes; 2961 2962 memset(qc->cdb, 0, dev->cdb_len); 2963 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2964 2965 qc->complete_fn = atapi_qc_complete; 2966 2967 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2968 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2969 qc->tf.flags |= ATA_TFLAG_WRITE; 2970 } 2971 2972 qc->tf.command = ATA_CMD_PACKET; 2973 ata_qc_set_pc_nbytes(qc); 2974 2975 /* check whether ATAPI DMA is safe */ 2976 if (!nodata && !using_pio && atapi_check_dma(qc)) 2977 using_pio = 1; 2978 2979 /* Some controller variants snoop this value for Packet 2980 * transfers to do state machine and FIFO management. Thus we 2981 * want to set it properly, and for DMA where it is 2982 * effectively meaningless. 2983 */ 2984 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2985 2986 /* Most ATAPI devices which honor transfer chunk size don't 2987 * behave according to the spec when odd chunk size which 2988 * matches the transfer length is specified. If the number of 2989 * bytes to transfer is 2n+1. According to the spec, what 2990 * should happen is to indicate that 2n+1 is going to be 2991 * transferred and transfer 2n+2 bytes where the last byte is 2992 * padding. 2993 * 2994 * In practice, this doesn't happen. ATAPI devices first 2995 * indicate and transfer 2n bytes and then indicate and 2996 * transfer 2 bytes where the last byte is padding. 2997 * 2998 * This inconsistency confuses several controllers which 2999 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 3000 * These controllers use actual number of transferred bytes to 3001 * update DMA pointer and transfer of 4n+2 bytes make those 3002 * controller push DMA pointer by 4n+4 bytes because SATA data 3003 * FISes are aligned to 4 bytes. This causes data corruption 3004 * and buffer overrun. 3005 * 3006 * Always setting nbytes to even number solves this problem 3007 * because then ATAPI devices don't have to split data at 2n 3008 * boundaries. 3009 */ 3010 if (nbytes & 0x1) 3011 nbytes++; 3012 3013 qc->tf.lbam = (nbytes & 0xFF); 3014 qc->tf.lbah = (nbytes >> 8); 3015 3016 if (nodata) 3017 qc->tf.protocol = ATAPI_PROT_NODATA; 3018 else if (using_pio) 3019 qc->tf.protocol = ATAPI_PROT_PIO; 3020 else { 3021 /* DMA data xfer */ 3022 qc->tf.protocol = ATAPI_PROT_DMA; 3023 qc->tf.feature |= ATAPI_PKT_DMA; 3024 3025 if ((dev->flags & ATA_DFLAG_DMADIR) && 3026 (scmd->sc_data_direction != DMA_TO_DEVICE)) 3027 /* some SATA bridges need us to indicate data xfer direction */ 3028 qc->tf.feature |= ATAPI_DMADIR; 3029 } 3030 3031 3032 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 3033 as ATAPI tape drives don't get this right otherwise */ 3034 return 0; 3035 } 3036 3037 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 3038 { 3039 /* 3040 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 3041 * or 2 (IDE master + slave case). However, the former case includes 3042 * libsas hosted devices which are numbered per scsi host, leading 3043 * to devno potentially being larger than 0 but with each struct 3044 * ata_device having its own struct ata_port and struct ata_link. 3045 * To accommodate these, ignore devno and always use device number 0. 3046 */ 3047 if (likely(!sata_pmp_attached(ap))) { 3048 int link_max_devices = ata_link_max_devices(&ap->link); 3049 3050 if (link_max_devices == 1) 3051 return &ap->link.device[0]; 3052 3053 if (devno < link_max_devices) 3054 return &ap->link.device[devno]; 3055 3056 return NULL; 3057 } 3058 3059 /* 3060 * For PMP-attached devices, the device number corresponds to C 3061 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 3062 * for the device. 3063 */ 3064 if (devno < ap->nr_pmp_links) 3065 return &ap->pmp_link[devno].device[0]; 3066 3067 return NULL; 3068 } 3069 3070 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 3071 const struct scsi_device *scsidev) 3072 { 3073 int devno; 3074 3075 /* skip commands not addressed to targets we simulate */ 3076 if (!sata_pmp_attached(ap)) { 3077 if (unlikely(scsidev->channel || scsidev->lun)) 3078 return NULL; 3079 devno = scsidev->id; 3080 } else { 3081 if (unlikely(scsidev->id || scsidev->lun)) 3082 return NULL; 3083 devno = scsidev->channel; 3084 } 3085 3086 return ata_find_dev(ap, devno); 3087 } 3088 3089 /** 3090 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3091 * @ap: ATA port to which the device is attached 3092 * @scsidev: SCSI device from which we derive the ATA device 3093 * 3094 * Given various information provided in struct scsi_cmnd, 3095 * map that onto an ATA bus, and using that mapping 3096 * determine which ata_device is associated with the 3097 * SCSI command to be sent. 3098 * 3099 * LOCKING: 3100 * spin_lock_irqsave(host lock) 3101 * 3102 * RETURNS: 3103 * Associated ATA device, or %NULL if not found. 3104 */ 3105 struct ata_device * 3106 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3107 { 3108 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3109 3110 if (!ata_adapter_is_online(ap)) 3111 return NULL; 3112 3113 if (unlikely(!dev || !ata_dev_enabled(dev))) 3114 return NULL; 3115 3116 return dev; 3117 } 3118 3119 /* 3120 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3121 * @byte1: Byte 1 from pass-thru CDB. 3122 * 3123 * RETURNS: 3124 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3125 */ 3126 static u8 3127 ata_scsi_map_proto(u8 byte1) 3128 { 3129 switch((byte1 & 0x1e) >> 1) { 3130 case 3: /* Non-data */ 3131 return ATA_PROT_NODATA; 3132 3133 case 6: /* DMA */ 3134 case 10: /* UDMA Data-in */ 3135 case 11: /* UDMA Data-Out */ 3136 return ATA_PROT_DMA; 3137 3138 case 4: /* PIO Data-in */ 3139 case 5: /* PIO Data-out */ 3140 return ATA_PROT_PIO; 3141 3142 case 12: /* FPDMA */ 3143 return ATA_PROT_NCQ; 3144 3145 case 0: /* Hard Reset */ 3146 case 1: /* SRST */ 3147 case 8: /* Device Diagnostic */ 3148 case 9: /* Device Reset */ 3149 case 7: /* DMA Queued */ 3150 case 15: /* Return Response Info */ 3151 default: /* Reserved */ 3152 break; 3153 } 3154 3155 return ATA_PROT_UNKNOWN; 3156 } 3157 3158 /** 3159 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3160 * @qc: command structure to be initialized 3161 * 3162 * Handles either 12, 16, or 32-byte versions of the CDB. 3163 * 3164 * RETURNS: 3165 * Zero on success, non-zero on failure. 3166 */ 3167 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3168 { 3169 struct ata_taskfile *tf = &(qc->tf); 3170 struct scsi_cmnd *scmd = qc->scsicmd; 3171 struct ata_device *dev = qc->dev; 3172 const u8 *cdb = scmd->cmnd; 3173 u16 fp; 3174 u16 cdb_offset = 0; 3175 3176 /* 7Fh variable length cmd means a ata pass-thru(32) */ 3177 if (cdb[0] == VARIABLE_LENGTH_CMD) 3178 cdb_offset = 9; 3179 3180 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 3181 if (tf->protocol == ATA_PROT_UNKNOWN) { 3182 fp = 1; 3183 goto invalid_fld; 3184 } 3185 3186 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 3187 /* 3188 * When T_LENGTH is zero (No data is transferred), dir should 3189 * be DMA_NONE. 3190 */ 3191 if (scmd->sc_data_direction != DMA_NONE) { 3192 fp = 2 + cdb_offset; 3193 goto invalid_fld; 3194 } 3195 3196 if (ata_is_ncq(tf->protocol)) 3197 tf->protocol = ATA_PROT_NCQ_NODATA; 3198 } 3199 3200 /* enable LBA */ 3201 tf->flags |= ATA_TFLAG_LBA; 3202 3203 /* 3204 * 12 and 16 byte CDBs use different offsets to 3205 * provide the various register values. 3206 */ 3207 switch (cdb[0]) { 3208 case ATA_16: 3209 /* 3210 * 16-byte CDB - may contain extended commands. 3211 * 3212 * If that is the case, copy the upper byte register values. 3213 */ 3214 if (cdb[1] & 0x01) { 3215 tf->hob_feature = cdb[3]; 3216 tf->hob_nsect = cdb[5]; 3217 tf->hob_lbal = cdb[7]; 3218 tf->hob_lbam = cdb[9]; 3219 tf->hob_lbah = cdb[11]; 3220 tf->flags |= ATA_TFLAG_LBA48; 3221 } else 3222 tf->flags &= ~ATA_TFLAG_LBA48; 3223 3224 /* 3225 * Always copy low byte, device and command registers. 3226 */ 3227 tf->feature = cdb[4]; 3228 tf->nsect = cdb[6]; 3229 tf->lbal = cdb[8]; 3230 tf->lbam = cdb[10]; 3231 tf->lbah = cdb[12]; 3232 tf->device = cdb[13]; 3233 tf->command = cdb[14]; 3234 break; 3235 case ATA_12: 3236 /* 3237 * 12-byte CDB - incapable of extended commands. 3238 */ 3239 tf->flags &= ~ATA_TFLAG_LBA48; 3240 3241 tf->feature = cdb[3]; 3242 tf->nsect = cdb[4]; 3243 tf->lbal = cdb[5]; 3244 tf->lbam = cdb[6]; 3245 tf->lbah = cdb[7]; 3246 tf->device = cdb[8]; 3247 tf->command = cdb[9]; 3248 break; 3249 default: 3250 /* 3251 * 32-byte CDB - may contain extended command fields. 3252 * 3253 * If that is the case, copy the upper byte register values. 3254 */ 3255 if (cdb[10] & 0x01) { 3256 tf->hob_feature = cdb[20]; 3257 tf->hob_nsect = cdb[22]; 3258 tf->hob_lbal = cdb[16]; 3259 tf->hob_lbam = cdb[15]; 3260 tf->hob_lbah = cdb[14]; 3261 tf->flags |= ATA_TFLAG_LBA48; 3262 } else 3263 tf->flags &= ~ATA_TFLAG_LBA48; 3264 3265 tf->feature = cdb[21]; 3266 tf->nsect = cdb[23]; 3267 tf->lbal = cdb[19]; 3268 tf->lbam = cdb[18]; 3269 tf->lbah = cdb[17]; 3270 tf->device = cdb[24]; 3271 tf->command = cdb[25]; 3272 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3273 break; 3274 } 3275 3276 /* For NCQ commands copy the tag value */ 3277 if (ata_is_ncq(tf->protocol)) 3278 tf->nsect = qc->hw_tag << 3; 3279 3280 /* enforce correct master/slave bit */ 3281 tf->device = dev->devno ? 3282 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3283 3284 switch (tf->command) { 3285 /* READ/WRITE LONG use a non-standard sect_size */ 3286 case ATA_CMD_READ_LONG: 3287 case ATA_CMD_READ_LONG_ONCE: 3288 case ATA_CMD_WRITE_LONG: 3289 case ATA_CMD_WRITE_LONG_ONCE: 3290 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3291 fp = 1; 3292 goto invalid_fld; 3293 } 3294 qc->sect_size = scsi_bufflen(scmd); 3295 break; 3296 3297 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3298 case ATA_CMD_CFA_WRITE_NE: 3299 case ATA_CMD_CFA_TRANS_SECT: 3300 case ATA_CMD_CFA_WRITE_MULT_NE: 3301 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3302 case ATA_CMD_READ: 3303 case ATA_CMD_READ_EXT: 3304 case ATA_CMD_READ_QUEUED: 3305 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3306 case ATA_CMD_FPDMA_READ: 3307 case ATA_CMD_READ_MULTI: 3308 case ATA_CMD_READ_MULTI_EXT: 3309 case ATA_CMD_PIO_READ: 3310 case ATA_CMD_PIO_READ_EXT: 3311 case ATA_CMD_READ_STREAM_DMA_EXT: 3312 case ATA_CMD_READ_STREAM_EXT: 3313 case ATA_CMD_VERIFY: 3314 case ATA_CMD_VERIFY_EXT: 3315 case ATA_CMD_WRITE: 3316 case ATA_CMD_WRITE_EXT: 3317 case ATA_CMD_WRITE_FUA_EXT: 3318 case ATA_CMD_WRITE_QUEUED: 3319 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3320 case ATA_CMD_FPDMA_WRITE: 3321 case ATA_CMD_WRITE_MULTI: 3322 case ATA_CMD_WRITE_MULTI_EXT: 3323 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3324 case ATA_CMD_PIO_WRITE: 3325 case ATA_CMD_PIO_WRITE_EXT: 3326 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3327 case ATA_CMD_WRITE_STREAM_EXT: 3328 qc->sect_size = scmd->device->sector_size; 3329 break; 3330 3331 /* Everything else uses 512 byte "sectors" */ 3332 default: 3333 qc->sect_size = ATA_SECT_SIZE; 3334 } 3335 3336 /* 3337 * Set flags so that all registers will be written, pass on 3338 * write indication (used for PIO/DMA setup), result TF is 3339 * copied back and we don't whine too much about its failure. 3340 */ 3341 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3342 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3343 tf->flags |= ATA_TFLAG_WRITE; 3344 3345 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3346 3347 /* 3348 * Set transfer length. 3349 * 3350 * TODO: find out if we need to do more here to 3351 * cover scatter/gather case. 3352 */ 3353 ata_qc_set_pc_nbytes(qc); 3354 3355 /* We may not issue DMA commands if no DMA mode is set */ 3356 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3357 fp = 1; 3358 goto invalid_fld; 3359 } 3360 3361 /* We may not issue NCQ commands to devices not supporting NCQ */ 3362 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3363 fp = 1; 3364 goto invalid_fld; 3365 } 3366 3367 /* sanity check for pio multi commands */ 3368 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3369 fp = 1; 3370 goto invalid_fld; 3371 } 3372 3373 if (is_multi_taskfile(tf)) { 3374 unsigned int multi_count = 1 << (cdb[1] >> 5); 3375 3376 /* compare the passed through multi_count 3377 * with the cached multi_count of libata 3378 */ 3379 if (multi_count != dev->multi_count) 3380 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3381 multi_count); 3382 } 3383 3384 /* 3385 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3386 * SET_FEATURES - XFER MODE must be preceded/succeeded 3387 * by an update to hardware-specific registers for each 3388 * controller (i.e. the reason for ->set_piomode(), 3389 * ->set_dmamode(), and ->post_set_mode() hooks). 3390 */ 3391 if (tf->command == ATA_CMD_SET_FEATURES && 3392 tf->feature == SETFEATURES_XFER) { 3393 fp = (cdb[0] == ATA_16) ? 4 : 3; 3394 goto invalid_fld; 3395 } 3396 3397 /* 3398 * Filter TPM commands by default. These provide an 3399 * essentially uncontrolled encrypted "back door" between 3400 * applications and the disk. Set libata.allow_tpm=1 if you 3401 * have a real reason for wanting to use them. This ensures 3402 * that installed software cannot easily mess stuff up without 3403 * user intent. DVR type users will probably ship with this enabled 3404 * for movie content management. 3405 * 3406 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3407 * for this and should do in future but that it is not sufficient as 3408 * DCS is an optional feature set. Thus we also do the software filter 3409 * so that we comply with the TC consortium stated goal that the user 3410 * can turn off TC features of their system. 3411 */ 3412 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3413 fp = (cdb[0] == ATA_16) ? 14 : 9; 3414 goto invalid_fld; 3415 } 3416 3417 return 0; 3418 3419 invalid_fld: 3420 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3421 return 1; 3422 } 3423 3424 /** 3425 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3426 * @cmd: SCSI command being translated 3427 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3428 * @sector: Starting sector 3429 * @count: Total Range of request in logical sectors 3430 * 3431 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3432 * descriptor. 3433 * 3434 * Upto 64 entries of the format: 3435 * 63:48 Range Length 3436 * 47:0 LBA 3437 * 3438 * Range Length of 0 is ignored. 3439 * LBA's should be sorted order and not overlap. 3440 * 3441 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3442 * 3443 * Return: Number of bytes copied into sglist. 3444 */ 3445 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3446 u64 sector, u32 count) 3447 { 3448 struct scsi_device *sdp = cmd->device; 3449 size_t len = sdp->sector_size; 3450 size_t r; 3451 __le64 *buf; 3452 u32 i = 0; 3453 unsigned long flags; 3454 3455 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3456 3457 if (len > ATA_SCSI_RBUF_SIZE) 3458 len = ATA_SCSI_RBUF_SIZE; 3459 3460 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3461 buf = ((void *)ata_scsi_rbuf); 3462 memset(buf, 0, len); 3463 while (i < trmax) { 3464 u64 entry = sector | 3465 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3466 buf[i++] = __cpu_to_le64(entry); 3467 if (count <= 0xffff) 3468 break; 3469 count -= 0xffff; 3470 sector += 0xffff; 3471 } 3472 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3473 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3474 3475 return r; 3476 } 3477 3478 /** 3479 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3480 * @qc: Command to be translated 3481 * 3482 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3483 * an SCT Write Same command. 3484 * Based on WRITE SAME has the UNMAP flag: 3485 * 3486 * - When set translate to DSM TRIM 3487 * - When clear translate to SCT Write Same 3488 */ 3489 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3490 { 3491 struct ata_taskfile *tf = &qc->tf; 3492 struct scsi_cmnd *scmd = qc->scsicmd; 3493 struct scsi_device *sdp = scmd->device; 3494 size_t len = sdp->sector_size; 3495 struct ata_device *dev = qc->dev; 3496 const u8 *cdb = scmd->cmnd; 3497 u64 block; 3498 u32 n_block; 3499 const u32 trmax = len >> 3; 3500 u32 size; 3501 u16 fp; 3502 u8 bp = 0xff; 3503 u8 unmap = cdb[1] & 0x8; 3504 3505 /* we may not issue DMA commands if no DMA mode is set */ 3506 if (unlikely(!ata_dma_enabled(dev))) 3507 goto invalid_opcode; 3508 3509 /* 3510 * We only allow sending this command through the block layer, 3511 * as it modifies the DATA OUT buffer, which would corrupt user 3512 * memory for SG_IO commands. 3513 */ 3514 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3515 goto invalid_opcode; 3516 3517 if (unlikely(scmd->cmd_len < 16)) { 3518 fp = 15; 3519 goto invalid_fld; 3520 } 3521 scsi_16_lba_len(cdb, &block, &n_block); 3522 3523 if (!unmap || (dev->quirks & ATA_QUIRK_NOTRIM) || 3524 !ata_id_has_trim(dev->id)) { 3525 fp = 1; 3526 bp = 3; 3527 goto invalid_fld; 3528 } 3529 /* If the request is too large the cmd is invalid */ 3530 if (n_block > 0xffff * trmax) { 3531 fp = 2; 3532 goto invalid_fld; 3533 } 3534 3535 /* 3536 * WRITE SAME always has a sector sized buffer as payload, this 3537 * should never be a multiple entry S/G list. 3538 */ 3539 if (!scsi_sg_count(scmd)) 3540 goto invalid_param_len; 3541 3542 /* 3543 * size must match sector size in bytes 3544 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3545 * is defined as number of 512 byte blocks to be transferred. 3546 */ 3547 3548 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3549 if (size != len) 3550 goto invalid_param_len; 3551 3552 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3553 /* Newer devices support queued TRIM commands */ 3554 tf->protocol = ATA_PROT_NCQ; 3555 tf->command = ATA_CMD_FPDMA_SEND; 3556 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3557 tf->nsect = qc->hw_tag << 3; 3558 tf->hob_feature = (size / 512) >> 8; 3559 tf->feature = size / 512; 3560 3561 tf->auxiliary = 1; 3562 } else { 3563 tf->protocol = ATA_PROT_DMA; 3564 tf->hob_feature = 0; 3565 tf->feature = ATA_DSM_TRIM; 3566 tf->hob_nsect = (size / 512) >> 8; 3567 tf->nsect = size / 512; 3568 tf->command = ATA_CMD_DSM; 3569 } 3570 3571 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3572 ATA_TFLAG_WRITE; 3573 3574 ata_qc_set_pc_nbytes(qc); 3575 3576 return 0; 3577 3578 invalid_fld: 3579 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3580 return 1; 3581 invalid_param_len: 3582 /* "Parameter list length error" */ 3583 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3584 return 1; 3585 invalid_opcode: 3586 /* "Invalid command operation code" */ 3587 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3588 return 1; 3589 } 3590 3591 static unsigned int ata_scsi_report_supported_opcodes(struct ata_device *dev, 3592 struct scsi_cmnd *cmd, 3593 u8 *rbuf) 3594 { 3595 u8 *cdb = cmd->cmnd; 3596 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3597 3598 if (cdb[2] != 1 && cdb[2] != 3) { 3599 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3600 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 3601 return 0; 3602 } 3603 3604 switch (cdb[3]) { 3605 case INQUIRY: 3606 case MODE_SENSE: 3607 case MODE_SENSE_10: 3608 case READ_CAPACITY: 3609 case SERVICE_ACTION_IN_16: 3610 case REPORT_LUNS: 3611 case REQUEST_SENSE: 3612 case SYNCHRONIZE_CACHE: 3613 case SYNCHRONIZE_CACHE_16: 3614 case REZERO_UNIT: 3615 case SEEK_6: 3616 case SEEK_10: 3617 case TEST_UNIT_READY: 3618 case SEND_DIAGNOSTIC: 3619 case MAINTENANCE_IN: 3620 case READ_6: 3621 case READ_10: 3622 case WRITE_6: 3623 case WRITE_10: 3624 case ATA_12: 3625 case ATA_16: 3626 case VERIFY: 3627 case VERIFY_16: 3628 case MODE_SELECT: 3629 case MODE_SELECT_10: 3630 case START_STOP: 3631 supported = 3; 3632 break; 3633 case READ_16: 3634 supported = 3; 3635 if (dev->flags & ATA_DFLAG_CDL) { 3636 /* 3637 * CDL read descriptors map to the T2A page, that is, 3638 * rwcdlp = 0x01 and cdlp = 0x01 3639 */ 3640 rwcdlp = 0x01; 3641 cdlp = 0x01 << 3; 3642 } 3643 break; 3644 case WRITE_16: 3645 supported = 3; 3646 if (dev->flags & ATA_DFLAG_CDL) { 3647 /* 3648 * CDL write descriptors map to the T2B page, that is, 3649 * rwcdlp = 0x01 and cdlp = 0x02 3650 */ 3651 rwcdlp = 0x01; 3652 cdlp = 0x02 << 3; 3653 } 3654 break; 3655 case ZBC_IN: 3656 case ZBC_OUT: 3657 if (ata_id_zoned_cap(dev->id) || 3658 dev->class == ATA_DEV_ZAC) 3659 supported = 3; 3660 break; 3661 case SECURITY_PROTOCOL_IN: 3662 case SECURITY_PROTOCOL_OUT: 3663 if (dev->flags & ATA_DFLAG_TRUSTED) 3664 supported = 3; 3665 break; 3666 default: 3667 break; 3668 } 3669 3670 /* One command format */ 3671 rbuf[0] = rwcdlp; 3672 rbuf[1] = cdlp | supported; 3673 3674 return 4; 3675 } 3676 3677 /** 3678 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3679 * @dev: Target device. 3680 * @cmd: SCSI command of interest. 3681 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3682 * 3683 * Yields a subset to satisfy scsi_report_opcode() 3684 * 3685 * LOCKING: 3686 * spin_lock_irqsave(host lock) 3687 */ 3688 static unsigned int ata_scsiop_maint_in(struct ata_device *dev, 3689 struct scsi_cmnd *cmd, u8 *rbuf) 3690 { 3691 u8 *cdb = cmd->cmnd; 3692 u8 service_action = cdb[1] & 0x1f; 3693 3694 switch (service_action) { 3695 case MI_REPORT_SUPPORTED_OPERATION_CODES: 3696 return ata_scsi_report_supported_opcodes(dev, cmd, rbuf); 3697 default: 3698 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 3699 return 0; 3700 } 3701 } 3702 3703 /** 3704 * ata_scsi_report_zones_complete - convert ATA output 3705 * @qc: command structure returning the data 3706 * 3707 * Convert T-13 little-endian field representation into 3708 * T-10 big-endian field representation. 3709 * What a mess. 3710 */ 3711 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3712 { 3713 struct scsi_cmnd *scmd = qc->scsicmd; 3714 struct sg_mapping_iter miter; 3715 unsigned int bytes = 0; 3716 3717 lockdep_assert_held(qc->ap->lock); 3718 3719 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3720 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3721 3722 while (sg_miter_next(&miter)) { 3723 unsigned int offset = 0; 3724 3725 if (bytes == 0) { 3726 char *hdr; 3727 u32 list_length; 3728 u64 max_lba, opt_lba; 3729 u16 same; 3730 3731 /* Swizzle header */ 3732 hdr = miter.addr; 3733 list_length = get_unaligned_le32(&hdr[0]); 3734 same = get_unaligned_le16(&hdr[4]); 3735 max_lba = get_unaligned_le64(&hdr[8]); 3736 opt_lba = get_unaligned_le64(&hdr[16]); 3737 put_unaligned_be32(list_length, &hdr[0]); 3738 hdr[4] = same & 0xf; 3739 put_unaligned_be64(max_lba, &hdr[8]); 3740 put_unaligned_be64(opt_lba, &hdr[16]); 3741 offset += 64; 3742 bytes += 64; 3743 } 3744 while (offset < miter.length) { 3745 char *rec; 3746 u8 cond, type, non_seq, reset; 3747 u64 size, start, wp; 3748 3749 /* Swizzle zone descriptor */ 3750 rec = miter.addr + offset; 3751 type = rec[0] & 0xf; 3752 cond = (rec[1] >> 4) & 0xf; 3753 non_seq = (rec[1] & 2); 3754 reset = (rec[1] & 1); 3755 size = get_unaligned_le64(&rec[8]); 3756 start = get_unaligned_le64(&rec[16]); 3757 wp = get_unaligned_le64(&rec[24]); 3758 rec[0] = type; 3759 rec[1] = (cond << 4) | non_seq | reset; 3760 put_unaligned_be64(size, &rec[8]); 3761 put_unaligned_be64(start, &rec[16]); 3762 put_unaligned_be64(wp, &rec[24]); 3763 WARN_ON(offset + 64 > miter.length); 3764 offset += 64; 3765 bytes += 64; 3766 } 3767 } 3768 sg_miter_stop(&miter); 3769 3770 ata_scsi_qc_complete(qc); 3771 } 3772 3773 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3774 { 3775 struct ata_taskfile *tf = &qc->tf; 3776 struct scsi_cmnd *scmd = qc->scsicmd; 3777 const u8 *cdb = scmd->cmnd; 3778 u16 sect, fp = (u16)-1; 3779 u8 sa, options, bp = 0xff; 3780 u64 block; 3781 u32 n_block; 3782 3783 if (unlikely(scmd->cmd_len < 16)) { 3784 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3785 scmd->cmd_len); 3786 fp = 15; 3787 goto invalid_fld; 3788 } 3789 scsi_16_lba_len(cdb, &block, &n_block); 3790 if (n_block != scsi_bufflen(scmd)) { 3791 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3792 n_block, scsi_bufflen(scmd)); 3793 goto invalid_param_len; 3794 } 3795 sa = cdb[1] & 0x1f; 3796 if (sa != ZI_REPORT_ZONES) { 3797 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3798 fp = 1; 3799 goto invalid_fld; 3800 } 3801 /* 3802 * ZAC allows only for transfers in 512 byte blocks, 3803 * and uses a 16 bit value for the transfer count. 3804 */ 3805 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3806 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3807 goto invalid_param_len; 3808 } 3809 sect = n_block / 512; 3810 options = cdb[14] & 0xbf; 3811 3812 if (ata_ncq_enabled(qc->dev) && 3813 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3814 tf->protocol = ATA_PROT_NCQ; 3815 tf->command = ATA_CMD_FPDMA_RECV; 3816 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3817 tf->nsect = qc->hw_tag << 3; 3818 tf->feature = sect & 0xff; 3819 tf->hob_feature = (sect >> 8) & 0xff; 3820 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3821 } else { 3822 tf->command = ATA_CMD_ZAC_MGMT_IN; 3823 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3824 tf->protocol = ATA_PROT_DMA; 3825 tf->hob_feature = options; 3826 tf->hob_nsect = (sect >> 8) & 0xff; 3827 tf->nsect = sect & 0xff; 3828 } 3829 tf->device = ATA_LBA; 3830 tf->lbah = (block >> 16) & 0xff; 3831 tf->lbam = (block >> 8) & 0xff; 3832 tf->lbal = block & 0xff; 3833 tf->hob_lbah = (block >> 40) & 0xff; 3834 tf->hob_lbam = (block >> 32) & 0xff; 3835 tf->hob_lbal = (block >> 24) & 0xff; 3836 3837 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3838 qc->flags |= ATA_QCFLAG_RESULT_TF; 3839 3840 ata_qc_set_pc_nbytes(qc); 3841 3842 qc->complete_fn = ata_scsi_report_zones_complete; 3843 3844 return 0; 3845 3846 invalid_fld: 3847 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3848 return 1; 3849 3850 invalid_param_len: 3851 /* "Parameter list length error" */ 3852 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3853 return 1; 3854 } 3855 3856 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3857 { 3858 struct ata_taskfile *tf = &qc->tf; 3859 struct scsi_cmnd *scmd = qc->scsicmd; 3860 struct ata_device *dev = qc->dev; 3861 const u8 *cdb = scmd->cmnd; 3862 u8 all, sa; 3863 u64 block; 3864 u32 n_block; 3865 u16 fp = (u16)-1; 3866 3867 if (unlikely(scmd->cmd_len < 16)) { 3868 fp = 15; 3869 goto invalid_fld; 3870 } 3871 3872 sa = cdb[1] & 0x1f; 3873 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3874 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3875 fp = 1; 3876 goto invalid_fld; 3877 } 3878 3879 scsi_16_lba_len(cdb, &block, &n_block); 3880 if (n_block) { 3881 /* 3882 * ZAC MANAGEMENT OUT doesn't define any length 3883 */ 3884 goto invalid_param_len; 3885 } 3886 3887 all = cdb[14] & 0x1; 3888 if (all) { 3889 /* 3890 * Ignore the block address (zone ID) as defined by ZBC. 3891 */ 3892 block = 0; 3893 } else if (block >= dev->n_sectors) { 3894 /* 3895 * Block must be a valid zone ID (a zone start LBA). 3896 */ 3897 fp = 2; 3898 goto invalid_fld; 3899 } 3900 3901 if (ata_ncq_enabled(qc->dev) && 3902 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3903 tf->protocol = ATA_PROT_NCQ_NODATA; 3904 tf->command = ATA_CMD_NCQ_NON_DATA; 3905 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3906 tf->nsect = qc->hw_tag << 3; 3907 tf->auxiliary = sa | ((u16)all << 8); 3908 } else { 3909 tf->protocol = ATA_PROT_NODATA; 3910 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3911 tf->feature = sa; 3912 tf->hob_feature = all; 3913 } 3914 tf->lbah = (block >> 16) & 0xff; 3915 tf->lbam = (block >> 8) & 0xff; 3916 tf->lbal = block & 0xff; 3917 tf->hob_lbah = (block >> 40) & 0xff; 3918 tf->hob_lbam = (block >> 32) & 0xff; 3919 tf->hob_lbal = (block >> 24) & 0xff; 3920 tf->device = ATA_LBA; 3921 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3922 3923 return 0; 3924 3925 invalid_fld: 3926 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3927 return 1; 3928 invalid_param_len: 3929 /* "Parameter list length error" */ 3930 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3931 return 1; 3932 } 3933 3934 /** 3935 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3936 * @qc: Storage for translated ATA taskfile 3937 * @buf: input buffer 3938 * @len: number of valid bytes in the input buffer 3939 * @fp: out parameter for the failed field on error 3940 * 3941 * Prepare a taskfile to modify caching information for the device. 3942 * 3943 * LOCKING: 3944 * None. 3945 */ 3946 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3947 const u8 *buf, int len, u16 *fp) 3948 { 3949 struct ata_taskfile *tf = &qc->tf; 3950 struct ata_device *dev = qc->dev; 3951 u8 mpage[CACHE_MPAGE_LEN]; 3952 u8 wce; 3953 int i; 3954 3955 /* 3956 * The first two bytes of def_cache_mpage are a header, so offsets 3957 * in mpage are off by 2 compared to buf. Same for len. 3958 */ 3959 3960 if (len != CACHE_MPAGE_LEN - 2) { 3961 *fp = min(len, CACHE_MPAGE_LEN - 2); 3962 return -EINVAL; 3963 } 3964 3965 wce = buf[0] & (1 << 2); 3966 3967 /* 3968 * Check that read-only bits are not modified. 3969 */ 3970 ata_msense_caching(dev->id, mpage, false); 3971 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3972 if (i == 0) 3973 continue; 3974 if (mpage[i + 2] != buf[i]) { 3975 *fp = i; 3976 return -EINVAL; 3977 } 3978 } 3979 3980 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3981 tf->protocol = ATA_PROT_NODATA; 3982 tf->nsect = 0; 3983 tf->command = ATA_CMD_SET_FEATURES; 3984 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3985 return 0; 3986 } 3987 3988 /* 3989 * Simulate MODE SELECT control mode page, sub-page 0. 3990 */ 3991 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3992 const u8 *buf, int len, u16 *fp) 3993 { 3994 struct ata_device *dev = qc->dev; 3995 u8 mpage[CONTROL_MPAGE_LEN]; 3996 u8 d_sense; 3997 int i; 3998 3999 /* 4000 * The first two bytes of def_control_mpage are a header, so offsets 4001 * in mpage are off by 2 compared to buf. Same for len. 4002 */ 4003 4004 if (len != CONTROL_MPAGE_LEN - 2) { 4005 *fp = min(len, CONTROL_MPAGE_LEN - 2); 4006 return -EINVAL; 4007 } 4008 4009 d_sense = buf[0] & (1 << 2); 4010 4011 /* 4012 * Check that read-only bits are not modified. 4013 */ 4014 ata_msense_control_spg0(dev, mpage, false); 4015 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 4016 if (i == 0) 4017 continue; 4018 if (mpage[2 + i] != buf[i]) { 4019 *fp = i; 4020 return -EINVAL; 4021 } 4022 } 4023 if (d_sense & (1 << 2)) 4024 dev->flags |= ATA_DFLAG_D_SENSE; 4025 else 4026 dev->flags &= ~ATA_DFLAG_D_SENSE; 4027 return 0; 4028 } 4029 4030 /* 4031 * Translate MODE SELECT control mode page, sub-page f2h (ATA feature mode 4032 * page) into a SET FEATURES command. 4033 */ 4034 static int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 4035 const u8 *buf, int len, u16 *fp) 4036 { 4037 struct ata_device *dev = qc->dev; 4038 struct ata_taskfile *tf = &qc->tf; 4039 u8 cdl_action; 4040 4041 /* 4042 * The first four bytes of ATA Feature Control mode page are a header, 4043 * so offsets in mpage are off by 4 compared to buf. Same for len. 4044 */ 4045 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 4046 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 4047 return -EINVAL; 4048 } 4049 4050 /* Check cdl_ctrl */ 4051 switch (buf[0] & 0x03) { 4052 case 0: 4053 /* Disable CDL */ 4054 ata_dev_dbg(dev, "Disabling CDL\n"); 4055 cdl_action = 0; 4056 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 4057 break; 4058 case 0x02: 4059 /* 4060 * Enable CDL. Since CDL is mutually exclusive with NCQ 4061 * priority, allow this only if NCQ priority is disabled. 4062 */ 4063 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 4064 ata_dev_err(dev, 4065 "NCQ priority must be disabled to enable CDL\n"); 4066 return -EINVAL; 4067 } 4068 ata_dev_dbg(dev, "Enabling CDL\n"); 4069 cdl_action = 1; 4070 dev->flags |= ATA_DFLAG_CDL_ENABLED; 4071 break; 4072 default: 4073 *fp = 0; 4074 return -EINVAL; 4075 } 4076 4077 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 4078 tf->protocol = ATA_PROT_NODATA; 4079 tf->command = ATA_CMD_SET_FEATURES; 4080 tf->feature = SETFEATURES_CDL; 4081 tf->nsect = cdl_action; 4082 4083 return 1; 4084 } 4085 4086 /** 4087 * ata_mselect_control - Simulate MODE SELECT for control page 4088 * @qc: Storage for translated ATA taskfile 4089 * @spg: target sub-page of the control page 4090 * @buf: input buffer 4091 * @len: number of valid bytes in the input buffer 4092 * @fp: out parameter for the failed field on error 4093 * 4094 * Prepare a taskfile to modify caching information for the device. 4095 * 4096 * LOCKING: 4097 * None. 4098 */ 4099 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 4100 const u8 *buf, int len, u16 *fp) 4101 { 4102 switch (spg) { 4103 case 0: 4104 return ata_mselect_control_spg0(qc, buf, len, fp); 4105 case ATA_FEATURE_SUB_MPAGE: 4106 return ata_mselect_control_ata_feature(qc, buf, len, fp); 4107 default: 4108 return -EINVAL; 4109 } 4110 } 4111 4112 /** 4113 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 4114 * @qc: Storage for translated ATA taskfile 4115 * 4116 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 4117 * Assume this is invoked for direct access devices (e.g. disks) only. 4118 * There should be no block descriptor for other device types. 4119 * 4120 * LOCKING: 4121 * spin_lock_irqsave(host lock) 4122 */ 4123 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 4124 { 4125 struct scsi_cmnd *scmd = qc->scsicmd; 4126 const u8 *cdb = scmd->cmnd; 4127 u8 pg, spg; 4128 unsigned six_byte, pg_len, hdr_len, bd_len; 4129 int len, ret; 4130 u16 fp = (u16)-1; 4131 u8 bp = 0xff; 4132 u8 buffer[64]; 4133 const u8 *p = buffer; 4134 4135 six_byte = (cdb[0] == MODE_SELECT); 4136 if (six_byte) { 4137 if (scmd->cmd_len < 5) { 4138 fp = 4; 4139 goto invalid_fld; 4140 } 4141 4142 len = cdb[4]; 4143 hdr_len = 4; 4144 } else { 4145 if (scmd->cmd_len < 9) { 4146 fp = 8; 4147 goto invalid_fld; 4148 } 4149 4150 len = get_unaligned_be16(&cdb[7]); 4151 hdr_len = 8; 4152 } 4153 4154 /* We only support PF=1, SP=0. */ 4155 if ((cdb[1] & 0x11) != 0x10) { 4156 fp = 1; 4157 bp = (cdb[1] & 0x01) ? 1 : 5; 4158 goto invalid_fld; 4159 } 4160 4161 /* Test early for possible overrun. */ 4162 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 4163 goto invalid_param_len; 4164 4165 /* Move past header and block descriptors. */ 4166 if (len < hdr_len) 4167 goto invalid_param_len; 4168 4169 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 4170 buffer, sizeof(buffer))) 4171 goto invalid_param_len; 4172 4173 if (six_byte) 4174 bd_len = p[3]; 4175 else 4176 bd_len = get_unaligned_be16(&p[6]); 4177 4178 len -= hdr_len; 4179 p += hdr_len; 4180 if (len < bd_len) 4181 goto invalid_param_len; 4182 if (bd_len != 0 && bd_len != 8) { 4183 fp = (six_byte) ? 3 : 6; 4184 fp += bd_len + hdr_len; 4185 goto invalid_param; 4186 } 4187 4188 len -= bd_len; 4189 p += bd_len; 4190 if (len == 0) 4191 goto skip; 4192 4193 /* Parse both possible formats for the mode page headers. */ 4194 pg = p[0] & 0x3f; 4195 if (p[0] & 0x40) { 4196 if (len < 4) 4197 goto invalid_param_len; 4198 4199 spg = p[1]; 4200 pg_len = get_unaligned_be16(&p[2]); 4201 p += 4; 4202 len -= 4; 4203 } else { 4204 if (len < 2) 4205 goto invalid_param_len; 4206 4207 spg = 0; 4208 pg_len = p[1]; 4209 p += 2; 4210 len -= 2; 4211 } 4212 4213 /* 4214 * Supported subpages: all subpages and ATA feature sub-page f2h of 4215 * the control page. 4216 */ 4217 if (spg) { 4218 switch (spg) { 4219 case ALL_SUB_MPAGES: 4220 /* All subpages is not supported for the control page */ 4221 if (pg == CONTROL_MPAGE) { 4222 fp = (p[0] & 0x40) ? 1 : 0; 4223 fp += hdr_len + bd_len; 4224 goto invalid_param; 4225 } 4226 break; 4227 case ATA_FEATURE_SUB_MPAGE: 4228 if (qc->dev->flags & ATA_DFLAG_CDL && 4229 pg == CONTROL_MPAGE) 4230 break; 4231 fallthrough; 4232 default: 4233 fp = (p[0] & 0x40) ? 1 : 0; 4234 fp += hdr_len + bd_len; 4235 goto invalid_param; 4236 } 4237 } 4238 if (pg_len > len) 4239 goto invalid_param_len; 4240 4241 switch (pg) { 4242 case CACHE_MPAGE: 4243 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4244 fp += hdr_len + bd_len; 4245 goto invalid_param; 4246 } 4247 break; 4248 case CONTROL_MPAGE: 4249 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 4250 if (ret < 0) { 4251 fp += hdr_len + bd_len; 4252 goto invalid_param; 4253 } 4254 if (!ret) 4255 goto skip; /* No ATA command to send */ 4256 break; 4257 default: 4258 /* Invalid page code */ 4259 fp = bd_len + hdr_len; 4260 goto invalid_param; 4261 } 4262 4263 /* 4264 * Only one page has changeable data, so we only support setting one 4265 * page at a time. 4266 */ 4267 if (len > pg_len) 4268 goto invalid_param; 4269 4270 return 0; 4271 4272 invalid_fld: 4273 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4274 return 1; 4275 4276 invalid_param: 4277 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4278 return 1; 4279 4280 invalid_param_len: 4281 /* "Parameter list length error" */ 4282 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4283 return 1; 4284 4285 skip: 4286 scmd->result = SAM_STAT_GOOD; 4287 return 1; 4288 } 4289 4290 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4291 { 4292 if (len == 0) 4293 return ATA_CMD_TRUSTED_NONDATA; 4294 else if (send) 4295 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4296 else 4297 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4298 } 4299 4300 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4301 { 4302 struct scsi_cmnd *scmd = qc->scsicmd; 4303 const u8 *cdb = scmd->cmnd; 4304 struct ata_taskfile *tf = &qc->tf; 4305 u8 secp = cdb[1]; 4306 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4307 u16 spsp = get_unaligned_be16(&cdb[2]); 4308 u32 len = get_unaligned_be32(&cdb[6]); 4309 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4310 4311 /* 4312 * We don't support the ATA "security" protocol. 4313 */ 4314 if (secp == 0xef) { 4315 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4316 return 1; 4317 } 4318 4319 if (cdb[4] & 7) { /* INC_512 */ 4320 if (len > 0xffff) { 4321 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4322 return 1; 4323 } 4324 } else { 4325 if (len > 0x01fffe00) { 4326 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4327 return 1; 4328 } 4329 4330 /* convert to the sector-based ATA addressing */ 4331 len = (len + 511) / 512; 4332 } 4333 4334 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4335 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4336 if (send) 4337 tf->flags |= ATA_TFLAG_WRITE; 4338 tf->command = ata_scsi_trusted_op(len, send, dma); 4339 tf->feature = secp; 4340 tf->lbam = spsp & 0xff; 4341 tf->lbah = spsp >> 8; 4342 4343 if (len) { 4344 tf->nsect = len & 0xff; 4345 tf->lbal = len >> 8; 4346 } else { 4347 if (!send) 4348 tf->lbah = (1 << 7); 4349 } 4350 4351 ata_qc_set_pc_nbytes(qc); 4352 return 0; 4353 } 4354 4355 /** 4356 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4357 * @qc: Command to be translated 4358 * 4359 * Translate a SCSI variable length CDB to specified commands. 4360 * It checks a service action value in CDB to call corresponding handler. 4361 * 4362 * RETURNS: 4363 * Zero on success, non-zero on failure 4364 * 4365 */ 4366 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4367 { 4368 struct scsi_cmnd *scmd = qc->scsicmd; 4369 const u8 *cdb = scmd->cmnd; 4370 const u16 sa = get_unaligned_be16(&cdb[8]); 4371 4372 /* 4373 * if service action represents a ata pass-thru(32) command, 4374 * then pass it to ata_scsi_pass_thru handler. 4375 */ 4376 if (sa == ATA_32) 4377 return ata_scsi_pass_thru(qc); 4378 4379 /* unsupported service action */ 4380 return 1; 4381 } 4382 4383 /** 4384 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4385 * @dev: ATA device 4386 * @cmd: SCSI command opcode to consider 4387 * 4388 * Look up the SCSI command given, and determine whether the 4389 * SCSI command is to be translated or simulated. 4390 * 4391 * RETURNS: 4392 * Pointer to translation function if possible, %NULL if not. 4393 */ 4394 4395 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4396 { 4397 switch (cmd) { 4398 case READ_6: 4399 case READ_10: 4400 case READ_16: 4401 4402 case WRITE_6: 4403 case WRITE_10: 4404 case WRITE_16: 4405 return ata_scsi_rw_xlat; 4406 4407 case WRITE_SAME_16: 4408 return ata_scsi_write_same_xlat; 4409 4410 case SYNCHRONIZE_CACHE: 4411 case SYNCHRONIZE_CACHE_16: 4412 if (ata_try_flush_cache(dev)) 4413 return ata_scsi_flush_xlat; 4414 break; 4415 4416 case VERIFY: 4417 case VERIFY_16: 4418 return ata_scsi_verify_xlat; 4419 4420 case ATA_12: 4421 case ATA_16: 4422 return ata_scsi_pass_thru; 4423 4424 case VARIABLE_LENGTH_CMD: 4425 return ata_scsi_var_len_cdb_xlat; 4426 4427 case MODE_SELECT: 4428 case MODE_SELECT_10: 4429 return ata_scsi_mode_select_xlat; 4430 4431 case ZBC_IN: 4432 return ata_scsi_zbc_in_xlat; 4433 4434 case ZBC_OUT: 4435 return ata_scsi_zbc_out_xlat; 4436 4437 case SECURITY_PROTOCOL_IN: 4438 case SECURITY_PROTOCOL_OUT: 4439 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4440 break; 4441 return ata_scsi_security_inout_xlat; 4442 4443 case START_STOP: 4444 return ata_scsi_start_stop_xlat; 4445 } 4446 4447 return NULL; 4448 } 4449 4450 /** 4451 * ata_scsi_simulate - simulate SCSI command on ATA device 4452 * @dev: the target device 4453 * @cmd: SCSI command being sent to device. 4454 * 4455 * Interprets and directly executes a select list of SCSI commands 4456 * that can be handled internally. 4457 * 4458 * LOCKING: 4459 * spin_lock_irqsave(host lock) 4460 */ 4461 static void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4462 { 4463 const u8 *scsicmd = cmd->cmnd; 4464 u8 tmp8; 4465 4466 switch (scsicmd[0]) { 4467 case INQUIRY: 4468 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_inquiry); 4469 break; 4470 4471 case MODE_SENSE: 4472 case MODE_SENSE_10: 4473 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_mode_sense); 4474 break; 4475 4476 case READ_CAPACITY: 4477 case SERVICE_ACTION_IN_16: 4478 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_read_cap); 4479 break; 4480 4481 case REPORT_LUNS: 4482 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_report_luns); 4483 break; 4484 4485 case REQUEST_SENSE: 4486 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4487 break; 4488 4489 /* if we reach this, then writeback caching is disabled, 4490 * turning this into a no-op. 4491 */ 4492 case SYNCHRONIZE_CACHE: 4493 case SYNCHRONIZE_CACHE_16: 4494 fallthrough; 4495 4496 /* no-op's, complete with success */ 4497 case REZERO_UNIT: 4498 case SEEK_6: 4499 case SEEK_10: 4500 case TEST_UNIT_READY: 4501 break; 4502 4503 case SEND_DIAGNOSTIC: 4504 tmp8 = scsicmd[1] & ~(1 << 3); 4505 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4506 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4507 break; 4508 4509 case MAINTENANCE_IN: 4510 ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_maint_in); 4511 break; 4512 4513 /* all other commands */ 4514 default: 4515 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4516 /* "Invalid command operation code" */ 4517 break; 4518 } 4519 4520 scsi_done(cmd); 4521 } 4522 4523 enum scsi_qc_status __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 4524 struct ata_device *dev) 4525 { 4526 struct ata_port *ap = dev->link->ap; 4527 u8 scsi_op = scmd->cmnd[0]; 4528 ata_xlat_func_t xlat_func; 4529 4530 /* 4531 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4532 * However, this check is done without holding the ap->lock (a libata 4533 * specific lock), so we can have received an error irq since then, 4534 * therefore we must check if EH is pending or running, while holding 4535 * ap->lock. 4536 */ 4537 if (ata_port_eh_scheduled(ap)) 4538 return SCSI_MLQUEUE_DEVICE_BUSY; 4539 4540 if (unlikely(!scmd->cmd_len)) 4541 goto bad_cdb_len; 4542 4543 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4544 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4545 goto bad_cdb_len; 4546 4547 xlat_func = ata_get_xlat_func(dev, scsi_op); 4548 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4549 /* relay SCSI command to ATAPI device */ 4550 int len = COMMAND_SIZE(scsi_op); 4551 4552 if (unlikely(len > scmd->cmd_len || 4553 len > dev->cdb_len || 4554 scmd->cmd_len > ATAPI_CDB_LEN)) 4555 goto bad_cdb_len; 4556 4557 xlat_func = atapi_xlat; 4558 } else { 4559 /* ATA_16 passthru, treat as an ATA command */ 4560 if (unlikely(scmd->cmd_len > 16)) 4561 goto bad_cdb_len; 4562 4563 xlat_func = ata_get_xlat_func(dev, scsi_op); 4564 } 4565 4566 if (xlat_func) 4567 return ata_scsi_translate(dev, scmd, xlat_func); 4568 4569 ata_scsi_simulate(dev, scmd); 4570 4571 return 0; 4572 4573 bad_cdb_len: 4574 scmd->result = DID_ERROR << 16; 4575 scsi_done(scmd); 4576 return 0; 4577 } 4578 4579 /** 4580 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4581 * @shost: SCSI host of command to be sent 4582 * @cmd: SCSI command to be sent 4583 * 4584 * In some cases, this function translates SCSI commands into 4585 * ATA taskfiles, and queues the taskfiles to be sent to 4586 * hardware. In other cases, this function simulates a 4587 * SCSI device by evaluating and responding to certain 4588 * SCSI commands. This creates the overall effect of 4589 * ATA and ATAPI devices appearing as SCSI devices. 4590 * 4591 * LOCKING: 4592 * ATA host lock 4593 * 4594 * RETURNS: 4595 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4596 * 0 otherwise. 4597 */ 4598 enum scsi_qc_status ata_scsi_queuecmd(struct Scsi_Host *shost, 4599 struct scsi_cmnd *cmd) 4600 { 4601 struct ata_port *ap; 4602 struct ata_device *dev; 4603 struct scsi_device *scsidev = cmd->device; 4604 enum scsi_qc_status rc = 0; 4605 unsigned long irq_flags; 4606 4607 ap = ata_shost_to_port(shost); 4608 4609 spin_lock_irqsave(ap->lock, irq_flags); 4610 4611 dev = ata_scsi_find_dev(ap, scsidev); 4612 if (likely(dev)) 4613 rc = __ata_scsi_queuecmd(cmd, dev); 4614 else { 4615 cmd->result = (DID_BAD_TARGET << 16); 4616 scsi_done(cmd); 4617 } 4618 4619 spin_unlock_irqrestore(ap->lock, irq_flags); 4620 4621 return rc; 4622 } 4623 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4624 4625 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4626 { 4627 int i, rc; 4628 4629 for (i = 0; i < host->n_ports; i++) { 4630 struct ata_port *ap = host->ports[i]; 4631 struct Scsi_Host *shost; 4632 4633 rc = -ENOMEM; 4634 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4635 if (!shost) 4636 goto err_alloc; 4637 4638 shost->eh_noresume = 1; 4639 *(struct ata_port **)&shost->hostdata[0] = ap; 4640 ap->scsi_host = shost; 4641 4642 shost->transportt = &ata_scsi_transportt; 4643 shost->unique_id = ap->print_id; 4644 shost->max_id = 16; 4645 shost->max_lun = 1; 4646 shost->max_channel = 1; 4647 shost->max_cmd_len = 32; 4648 4649 /* Schedule policy is determined by ->qc_defer() 4650 * callback and it needs to see every deferred qc. 4651 * Set host_blocked to 1 to prevent SCSI midlayer from 4652 * automatically deferring requests. 4653 */ 4654 shost->max_host_blocked = 1; 4655 4656 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4657 if (rc) 4658 goto err_alloc; 4659 } 4660 4661 return 0; 4662 4663 err_alloc: 4664 while (--i >= 0) { 4665 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4666 4667 /* scsi_host_put() is in ata_devres_release() */ 4668 scsi_remove_host(shost); 4669 } 4670 return rc; 4671 } 4672 4673 #ifdef CONFIG_OF 4674 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4675 { 4676 struct scsi_device *sdev = dev->sdev; 4677 struct device *d = ap->host->dev; 4678 struct device_node *np = d->of_node; 4679 struct device_node *child; 4680 4681 for_each_available_child_of_node(np, child) { 4682 int ret; 4683 u32 val; 4684 4685 ret = of_property_read_u32(child, "reg", &val); 4686 if (ret) 4687 continue; 4688 if (val == dev->devno) { 4689 dev_dbg(d, "found matching device node\n"); 4690 sdev->sdev_gendev.of_node = child; 4691 return; 4692 } 4693 } 4694 } 4695 #else 4696 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4697 { 4698 } 4699 #endif 4700 4701 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4702 { 4703 int tries = 5; 4704 struct ata_device *last_failed_dev = NULL; 4705 struct ata_link *link; 4706 struct ata_device *dev; 4707 4708 repeat: 4709 ata_for_each_link(link, ap, EDGE) { 4710 ata_for_each_dev(dev, link, ENABLED) { 4711 struct scsi_device *sdev; 4712 int channel = 0, id = 0; 4713 4714 if (dev->sdev) 4715 continue; 4716 4717 if (ata_is_host_link(link)) 4718 id = dev->devno; 4719 else 4720 channel = link->pmp; 4721 4722 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4723 NULL); 4724 if (!IS_ERR(sdev)) { 4725 dev->sdev = sdev; 4726 ata_scsi_assign_ofnode(dev, ap); 4727 scsi_device_put(sdev); 4728 } else { 4729 dev->sdev = NULL; 4730 } 4731 } 4732 } 4733 4734 /* If we scanned while EH was in progress or allocation 4735 * failure occurred, scan would have failed silently. Check 4736 * whether all devices are attached. 4737 */ 4738 ata_for_each_link(link, ap, EDGE) { 4739 ata_for_each_dev(dev, link, ENABLED) { 4740 if (!dev->sdev) 4741 goto exit_loop; 4742 } 4743 } 4744 exit_loop: 4745 if (!link) 4746 return; 4747 4748 /* we're missing some SCSI devices */ 4749 if (sync) { 4750 /* If caller requested synchrnous scan && we've made 4751 * any progress, sleep briefly and repeat. 4752 */ 4753 if (dev != last_failed_dev) { 4754 msleep(100); 4755 last_failed_dev = dev; 4756 goto repeat; 4757 } 4758 4759 /* We might be failing to detect boot device, give it 4760 * a few more chances. 4761 */ 4762 if (--tries) { 4763 msleep(100); 4764 goto repeat; 4765 } 4766 4767 ata_port_err(ap, 4768 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4769 } 4770 4771 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4772 round_jiffies_relative(HZ)); 4773 } 4774 4775 /** 4776 * ata_scsi_offline_dev - offline attached SCSI device 4777 * @dev: ATA device to offline attached SCSI device for 4778 * 4779 * This function is called from ata_eh_detach_dev() and is responsible for 4780 * taking the SCSI device attached to @dev offline. This function is 4781 * called with host lock which protects dev->sdev against clearing. 4782 * 4783 * LOCKING: 4784 * spin_lock_irqsave(host lock) 4785 * 4786 * RETURNS: 4787 * true if attached SCSI device exists, false otherwise. 4788 */ 4789 bool ata_scsi_offline_dev(struct ata_device *dev) 4790 { 4791 if (dev->sdev) { 4792 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4793 return true; 4794 } 4795 return false; 4796 } 4797 4798 /** 4799 * ata_scsi_remove_dev - remove attached SCSI device 4800 * @dev: ATA device to remove attached SCSI device for 4801 * 4802 * This function is called from ata_eh_scsi_hotplug() and 4803 * responsible for removing the SCSI device attached to @dev. 4804 * 4805 * LOCKING: 4806 * Kernel thread context (may sleep). 4807 */ 4808 static void ata_scsi_remove_dev(struct ata_device *dev) 4809 { 4810 struct ata_port *ap = dev->link->ap; 4811 struct scsi_device *sdev; 4812 unsigned long flags; 4813 4814 /* Alas, we need to grab scan_mutex to ensure SCSI device 4815 * state doesn't change underneath us and thus 4816 * scsi_device_get() always succeeds. The mutex locking can 4817 * be removed if there is __scsi_device_get() interface which 4818 * increments reference counts regardless of device state. 4819 */ 4820 mutex_lock(&ap->scsi_host->scan_mutex); 4821 spin_lock_irqsave(ap->lock, flags); 4822 4823 /* clearing dev->sdev is protected by host lock */ 4824 sdev = dev->sdev; 4825 dev->sdev = NULL; 4826 4827 if (sdev) { 4828 /* If user initiated unplug races with us, sdev can go 4829 * away underneath us after the host lock and 4830 * scan_mutex are released. Hold onto it. 4831 */ 4832 if (scsi_device_get(sdev) == 0) { 4833 /* The following ensures the attached sdev is 4834 * offline on return from ata_scsi_offline_dev() 4835 * regardless it wins or loses the race 4836 * against this function. 4837 */ 4838 scsi_device_set_state(sdev, SDEV_OFFLINE); 4839 } else { 4840 WARN_ON(1); 4841 sdev = NULL; 4842 } 4843 } 4844 4845 spin_unlock_irqrestore(ap->lock, flags); 4846 mutex_unlock(&ap->scsi_host->scan_mutex); 4847 4848 if (sdev) { 4849 ata_dev_info(dev, "detaching (SCSI %s)\n", 4850 dev_name(&sdev->sdev_gendev)); 4851 4852 scsi_remove_device(sdev); 4853 scsi_device_put(sdev); 4854 } 4855 } 4856 4857 static void ata_scsi_handle_link_detach(struct ata_link *link) 4858 { 4859 struct ata_port *ap = link->ap; 4860 struct ata_device *dev; 4861 4862 ata_for_each_dev(dev, link, ALL) { 4863 unsigned long flags; 4864 4865 spin_lock_irqsave(ap->lock, flags); 4866 if (!(dev->flags & ATA_DFLAG_DETACHED)) { 4867 spin_unlock_irqrestore(ap->lock, flags); 4868 continue; 4869 } 4870 4871 dev->flags &= ~ATA_DFLAG_DETACHED; 4872 spin_unlock_irqrestore(ap->lock, flags); 4873 4874 ata_scsi_remove_dev(dev); 4875 } 4876 } 4877 4878 /** 4879 * ata_scsi_media_change_notify - send media change event 4880 * @dev: Pointer to the disk device with media change event 4881 * 4882 * Tell the block layer to send a media change notification 4883 * event. 4884 * 4885 * LOCKING: 4886 * spin_lock_irqsave(host lock) 4887 */ 4888 void ata_scsi_media_change_notify(struct ata_device *dev) 4889 { 4890 if (dev->sdev) 4891 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4892 GFP_ATOMIC); 4893 } 4894 4895 /** 4896 * ata_scsi_hotplug - SCSI part of hotplug 4897 * @work: Pointer to ATA port to perform SCSI hotplug on 4898 * 4899 * Perform SCSI part of hotplug. It's executed from a separate 4900 * workqueue after EH completes. This is necessary because SCSI 4901 * hot plugging requires working EH and hot unplugging is 4902 * synchronized with hot plugging with a mutex. 4903 * 4904 * LOCKING: 4905 * Kernel thread context (may sleep). 4906 */ 4907 void ata_scsi_hotplug(struct work_struct *work) 4908 { 4909 struct ata_port *ap = 4910 container_of(work, struct ata_port, hotplug_task.work); 4911 int i; 4912 4913 if (ap->pflags & ATA_PFLAG_UNLOADING) 4914 return; 4915 4916 mutex_lock(&ap->scsi_scan_mutex); 4917 4918 /* Unplug detached devices. We cannot use link iterator here 4919 * because PMP links have to be scanned even if PMP is 4920 * currently not attached. Iterate manually. 4921 */ 4922 ata_scsi_handle_link_detach(&ap->link); 4923 if (ap->pmp_link) 4924 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4925 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4926 4927 /* scan for new ones */ 4928 ata_scsi_scan_host(ap, 0); 4929 4930 mutex_unlock(&ap->scsi_scan_mutex); 4931 } 4932 4933 /** 4934 * ata_scsi_user_scan - indication for user-initiated bus scan 4935 * @shost: SCSI host to scan 4936 * @channel: Channel to scan 4937 * @id: ID to scan 4938 * @lun: LUN to scan 4939 * 4940 * This function is called when user explicitly requests bus 4941 * scan. Set probe pending flag and invoke EH. 4942 * 4943 * LOCKING: 4944 * SCSI layer (we don't care) 4945 * 4946 * RETURNS: 4947 * Zero. 4948 */ 4949 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4950 unsigned int id, u64 lun) 4951 { 4952 struct ata_port *ap = ata_shost_to_port(shost); 4953 unsigned long flags; 4954 int devno, rc = 0; 4955 4956 if (lun != SCAN_WILD_CARD && lun) 4957 return -EINVAL; 4958 4959 if (!sata_pmp_attached(ap)) { 4960 if (channel != SCAN_WILD_CARD && channel) 4961 return -EINVAL; 4962 devno = id; 4963 } else { 4964 if (id != SCAN_WILD_CARD && id) 4965 return -EINVAL; 4966 devno = channel; 4967 } 4968 4969 spin_lock_irqsave(ap->lock, flags); 4970 4971 if (devno == SCAN_WILD_CARD) { 4972 struct ata_link *link; 4973 4974 ata_for_each_link(link, ap, EDGE) { 4975 struct ata_eh_info *ehi = &link->eh_info; 4976 ehi->probe_mask |= ATA_ALL_DEVICES; 4977 ehi->action |= ATA_EH_RESET; 4978 } 4979 } else { 4980 struct ata_device *dev = ata_find_dev(ap, devno); 4981 4982 if (dev) { 4983 struct ata_eh_info *ehi = &dev->link->eh_info; 4984 ehi->probe_mask |= 1 << dev->devno; 4985 ehi->action |= ATA_EH_RESET; 4986 } else 4987 rc = -EINVAL; 4988 } 4989 4990 if (rc == 0) { 4991 ata_port_schedule_eh(ap); 4992 spin_unlock_irqrestore(ap->lock, flags); 4993 ata_port_wait_eh(ap); 4994 } else 4995 spin_unlock_irqrestore(ap->lock, flags); 4996 4997 return rc; 4998 } 4999 5000 /** 5001 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 5002 * @work: Pointer to ATA port to perform scsi_rescan_device() 5003 * 5004 * After ATA pass thru (SAT) commands are executed successfully, 5005 * libata need to propagate the changes to SCSI layer. 5006 * 5007 * LOCKING: 5008 * Kernel thread context (may sleep). 5009 */ 5010 void ata_scsi_dev_rescan(struct work_struct *work) 5011 { 5012 struct ata_port *ap = 5013 container_of(work, struct ata_port, scsi_rescan_task.work); 5014 struct ata_link *link; 5015 struct ata_device *dev; 5016 unsigned long flags; 5017 bool do_resume; 5018 int ret = 0; 5019 5020 mutex_lock(&ap->scsi_scan_mutex); 5021 spin_lock_irqsave(ap->lock, flags); 5022 5023 ata_for_each_link(link, ap, EDGE) { 5024 ata_for_each_dev(dev, link, ENABLED) { 5025 struct scsi_device *sdev = dev->sdev; 5026 5027 /* 5028 * If the port was suspended before this was scheduled, 5029 * bail out. 5030 */ 5031 if (ap->pflags & ATA_PFLAG_SUSPENDED) 5032 goto unlock_ap; 5033 5034 if (!sdev) 5035 continue; 5036 if (scsi_device_get(sdev)) 5037 continue; 5038 5039 do_resume = dev->flags & ATA_DFLAG_RESUMING; 5040 5041 spin_unlock_irqrestore(ap->lock, flags); 5042 if (do_resume) { 5043 ret = scsi_resume_device(sdev); 5044 if (ret == -EWOULDBLOCK) { 5045 scsi_device_put(sdev); 5046 goto unlock_scan; 5047 } 5048 dev->flags &= ~ATA_DFLAG_RESUMING; 5049 } 5050 ret = scsi_rescan_device(sdev); 5051 scsi_device_put(sdev); 5052 spin_lock_irqsave(ap->lock, flags); 5053 5054 if (ret) 5055 goto unlock_ap; 5056 } 5057 } 5058 5059 unlock_ap: 5060 spin_unlock_irqrestore(ap->lock, flags); 5061 unlock_scan: 5062 mutex_unlock(&ap->scsi_scan_mutex); 5063 5064 /* Reschedule with a delay if scsi_rescan_device() returned an error */ 5065 if (ret) 5066 schedule_delayed_work(&ap->scsi_rescan_task, 5067 msecs_to_jiffies(5)); 5068 } 5069