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 <asm/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 void ata_scsi_set_sense_information(struct ata_device *dev, 220 struct scsi_cmnd *cmd, 221 const struct ata_taskfile *tf) 222 { 223 u64 information; 224 225 information = ata_tf_read_block(tf, dev); 226 if (information == U64_MAX) 227 return; 228 229 scsi_set_sense_information(cmd->sense_buffer, 230 SCSI_SENSE_BUFFERSIZE, information); 231 } 232 233 /** 234 * ata_scsi_set_passthru_sense_fields - Set ATA fields in sense buffer 235 * @qc: ATA PASS-THROUGH command. 236 * 237 * Populates "ATA Status Return sense data descriptor" / "Fixed format 238 * sense data" with ATA taskfile fields. 239 * 240 * LOCKING: 241 * None. 242 */ 243 static void ata_scsi_set_passthru_sense_fields(struct ata_queued_cmd *qc) 244 { 245 struct scsi_cmnd *cmd = qc->scsicmd; 246 struct ata_taskfile *tf = &qc->result_tf; 247 unsigned char *sb = cmd->sense_buffer; 248 249 if ((sb[0] & 0x7f) >= 0x72) { 250 unsigned char *desc; 251 u8 len; 252 253 /* descriptor format */ 254 len = sb[7]; 255 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 256 if (!desc) { 257 if (SCSI_SENSE_BUFFERSIZE < len + 14) 258 return; 259 sb[7] = len + 14; 260 desc = sb + 8 + len; 261 } 262 desc[0] = 9; 263 desc[1] = 12; 264 /* 265 * Copy registers into sense buffer. 266 */ 267 desc[2] = 0x00; 268 desc[3] = tf->error; 269 desc[5] = tf->nsect; 270 desc[7] = tf->lbal; 271 desc[9] = tf->lbam; 272 desc[11] = tf->lbah; 273 desc[12] = tf->device; 274 desc[13] = tf->status; 275 276 /* 277 * Fill in Extend bit, and the high order bytes 278 * if applicable. 279 */ 280 if (tf->flags & ATA_TFLAG_LBA48) { 281 desc[2] |= 0x01; 282 desc[4] = tf->hob_nsect; 283 desc[6] = tf->hob_lbal; 284 desc[8] = tf->hob_lbam; 285 desc[10] = tf->hob_lbah; 286 } 287 } else { 288 /* Fixed sense format */ 289 sb[0] |= 0x80; 290 sb[3] = tf->error; 291 sb[4] = tf->status; 292 sb[5] = tf->device; 293 sb[6] = tf->nsect; 294 if (tf->flags & ATA_TFLAG_LBA48) { 295 sb[8] |= 0x80; 296 if (tf->hob_nsect) 297 sb[8] |= 0x40; 298 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 299 sb[8] |= 0x20; 300 } 301 sb[9] = tf->lbal; 302 sb[10] = tf->lbam; 303 sb[11] = tf->lbah; 304 } 305 } 306 307 static void ata_scsi_set_invalid_field(struct ata_device *dev, 308 struct scsi_cmnd *cmd, u16 field, u8 bit) 309 { 310 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 311 /* "Invalid field in CDB" */ 312 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 313 field, bit, 1); 314 } 315 316 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 317 struct scsi_cmnd *cmd, u16 field) 318 { 319 /* "Invalid field in parameter list" */ 320 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 321 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 322 field, 0xff, 0); 323 } 324 325 static struct attribute *ata_common_sdev_attrs[] = { 326 &dev_attr_unload_heads.attr, 327 NULL 328 }; 329 330 static const struct attribute_group ata_common_sdev_attr_group = { 331 .attrs = ata_common_sdev_attrs 332 }; 333 334 const struct attribute_group *ata_common_sdev_groups[] = { 335 &ata_common_sdev_attr_group, 336 NULL 337 }; 338 EXPORT_SYMBOL_GPL(ata_common_sdev_groups); 339 340 /** 341 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 342 * @sdev: SCSI device for which BIOS geometry is to be determined 343 * @bdev: block device associated with @sdev 344 * @capacity: capacity of SCSI device 345 * @geom: location to which geometry will be output 346 * 347 * Generic bios head/sector/cylinder calculator 348 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 349 * mapping. Some situations may arise where the disk is not 350 * bootable if this is not used. 351 * 352 * LOCKING: 353 * Defined by the SCSI layer. We don't really care. 354 * 355 * RETURNS: 356 * Zero. 357 */ 358 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 359 sector_t capacity, int geom[]) 360 { 361 geom[0] = 255; 362 geom[1] = 63; 363 sector_div(capacity, 255*63); 364 geom[2] = capacity; 365 366 return 0; 367 } 368 EXPORT_SYMBOL_GPL(ata_std_bios_param); 369 370 /** 371 * ata_scsi_unlock_native_capacity - unlock native capacity 372 * @sdev: SCSI device to adjust device capacity for 373 * 374 * This function is called if a partition on @sdev extends beyond 375 * the end of the device. It requests EH to unlock HPA. 376 * 377 * LOCKING: 378 * Defined by the SCSI layer. Might sleep. 379 */ 380 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 381 { 382 struct ata_port *ap = ata_shost_to_port(sdev->host); 383 struct ata_device *dev; 384 unsigned long flags; 385 386 spin_lock_irqsave(ap->lock, flags); 387 388 dev = ata_scsi_find_dev(ap, sdev); 389 if (dev && dev->n_sectors < dev->n_native_sectors) { 390 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 391 dev->link->eh_info.action |= ATA_EH_RESET; 392 ata_port_schedule_eh(ap); 393 } 394 395 spin_unlock_irqrestore(ap->lock, flags); 396 ata_port_wait_eh(ap); 397 } 398 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 399 400 /** 401 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 402 * @ap: target port 403 * @sdev: SCSI device to get identify data for 404 * @arg: User buffer area for identify data 405 * 406 * LOCKING: 407 * Defined by the SCSI layer. We don't really care. 408 * 409 * RETURNS: 410 * Zero on success, negative errno on error. 411 */ 412 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 413 void __user *arg) 414 { 415 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 416 u16 __user *dst = arg; 417 char buf[40]; 418 419 if (!dev) 420 return -ENOMSG; 421 422 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 423 return -EFAULT; 424 425 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 426 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 427 return -EFAULT; 428 429 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 430 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 431 return -EFAULT; 432 433 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 434 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 435 return -EFAULT; 436 437 return 0; 438 } 439 440 /** 441 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 442 * @scsidev: Device to which we are issuing command 443 * @arg: User provided data for issuing command 444 * 445 * LOCKING: 446 * Defined by the SCSI layer. We don't really care. 447 * 448 * RETURNS: 449 * Zero on success, negative errno on error. 450 */ 451 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 452 { 453 int rc = 0; 454 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 455 u8 scsi_cmd[MAX_COMMAND_SIZE]; 456 u8 args[4], *argbuf = NULL; 457 int argsize = 0; 458 struct scsi_sense_hdr sshdr; 459 const struct scsi_exec_args exec_args = { 460 .sshdr = &sshdr, 461 .sense = sensebuf, 462 .sense_len = sizeof(sensebuf), 463 }; 464 int cmd_result; 465 466 if (arg == NULL) 467 return -EINVAL; 468 469 if (copy_from_user(args, arg, sizeof(args))) 470 return -EFAULT; 471 472 memset(sensebuf, 0, sizeof(sensebuf)); 473 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 474 475 if (args[3]) { 476 argsize = ATA_SECT_SIZE * args[3]; 477 argbuf = kmalloc(argsize, GFP_KERNEL); 478 if (argbuf == NULL) { 479 rc = -ENOMEM; 480 goto error; 481 } 482 483 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 484 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 485 block count in sector count field */ 486 } else { 487 scsi_cmd[1] = (3 << 1); /* Non-data */ 488 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 489 } 490 491 scsi_cmd[0] = ATA_16; 492 493 scsi_cmd[4] = args[2]; 494 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 495 scsi_cmd[6] = args[3]; 496 scsi_cmd[8] = args[1]; 497 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 498 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 499 } else { 500 scsi_cmd[6] = args[1]; 501 } 502 scsi_cmd[14] = args[0]; 503 504 /* Good values for timeout and retries? Values below 505 from scsi_ioctl_send_command() for default case... */ 506 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, argbuf, 507 argsize, 10 * HZ, 5, &exec_args); 508 if (cmd_result < 0) { 509 rc = cmd_result; 510 goto error; 511 } 512 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 513 u8 *desc = sensebuf + 8; 514 515 /* If we set cc then ATA pass-through will cause a 516 * check condition even if no error. Filter that. */ 517 if (scsi_status_is_check_condition(cmd_result)) { 518 if (sshdr.sense_key == RECOVERED_ERROR && 519 sshdr.asc == 0 && sshdr.ascq == 0x1d) 520 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 521 } 522 523 /* Send userspace a few ATA registers (same as drivers/ide) */ 524 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 525 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 526 args[0] = desc[13]; /* status */ 527 args[1] = desc[3]; /* error */ 528 args[2] = desc[5]; /* sector count (0:7) */ 529 if (copy_to_user(arg, args, sizeof(args))) 530 rc = -EFAULT; 531 } 532 } 533 534 535 if (cmd_result) { 536 rc = -EIO; 537 goto error; 538 } 539 540 if ((argbuf) 541 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 542 rc = -EFAULT; 543 error: 544 kfree(argbuf); 545 return rc; 546 } 547 548 /** 549 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 550 * @scsidev: Device to which we are issuing command 551 * @arg: User provided data for issuing command 552 * 553 * LOCKING: 554 * Defined by the SCSI layer. We don't really care. 555 * 556 * RETURNS: 557 * Zero on success, negative errno on error. 558 */ 559 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 560 { 561 int rc = 0; 562 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 563 u8 scsi_cmd[MAX_COMMAND_SIZE]; 564 u8 args[7]; 565 struct scsi_sense_hdr sshdr; 566 int cmd_result; 567 const struct scsi_exec_args exec_args = { 568 .sshdr = &sshdr, 569 .sense = sensebuf, 570 .sense_len = sizeof(sensebuf), 571 }; 572 573 if (arg == NULL) 574 return -EINVAL; 575 576 if (copy_from_user(args, arg, sizeof(args))) 577 return -EFAULT; 578 579 memset(sensebuf, 0, sizeof(sensebuf)); 580 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 581 scsi_cmd[0] = ATA_16; 582 scsi_cmd[1] = (3 << 1); /* Non-data */ 583 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 584 scsi_cmd[4] = args[1]; 585 scsi_cmd[6] = args[2]; 586 scsi_cmd[8] = args[3]; 587 scsi_cmd[10] = args[4]; 588 scsi_cmd[12] = args[5]; 589 scsi_cmd[13] = args[6] & 0x4f; 590 scsi_cmd[14] = args[0]; 591 592 /* Good values for timeout and retries? Values below 593 from scsi_ioctl_send_command() for default case... */ 594 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, NULL, 595 0, 10 * HZ, 5, &exec_args); 596 if (cmd_result < 0) { 597 rc = cmd_result; 598 goto error; 599 } 600 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 601 u8 *desc = sensebuf + 8; 602 603 /* If we set cc then ATA pass-through will cause a 604 * check condition even if no error. Filter that. */ 605 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 606 if (sshdr.sense_key == RECOVERED_ERROR && 607 sshdr.asc == 0 && sshdr.ascq == 0x1d) 608 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 609 } 610 611 /* Send userspace ATA registers */ 612 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 613 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 614 args[0] = desc[13]; /* status */ 615 args[1] = desc[3]; /* error */ 616 args[2] = desc[5]; /* sector count (0:7) */ 617 args[3] = desc[7]; /* lbal */ 618 args[4] = desc[9]; /* lbam */ 619 args[5] = desc[11]; /* lbah */ 620 args[6] = desc[12]; /* select */ 621 if (copy_to_user(arg, args, sizeof(args))) 622 rc = -EFAULT; 623 } 624 } 625 626 if (cmd_result) { 627 rc = -EIO; 628 goto error; 629 } 630 631 error: 632 return rc; 633 } 634 635 static bool ata_ioc32(struct ata_port *ap) 636 { 637 if (ap->flags & ATA_FLAG_PIO_DMA) 638 return true; 639 if (ap->pflags & ATA_PFLAG_PIO32) 640 return true; 641 return false; 642 } 643 644 /* 645 * This handles both native and compat commands, so anything added 646 * here must have a compatible argument, or check in_compat_syscall() 647 */ 648 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 649 unsigned int cmd, void __user *arg) 650 { 651 unsigned long val; 652 int rc = -EINVAL; 653 unsigned long flags; 654 655 switch (cmd) { 656 case HDIO_GET_32BIT: 657 spin_lock_irqsave(ap->lock, flags); 658 val = ata_ioc32(ap); 659 spin_unlock_irqrestore(ap->lock, flags); 660 #ifdef CONFIG_COMPAT 661 if (in_compat_syscall()) 662 return put_user(val, (compat_ulong_t __user *)arg); 663 #endif 664 return put_user(val, (unsigned long __user *)arg); 665 666 case HDIO_SET_32BIT: 667 val = (unsigned long) arg; 668 rc = 0; 669 spin_lock_irqsave(ap->lock, flags); 670 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 671 if (val) 672 ap->pflags |= ATA_PFLAG_PIO32; 673 else 674 ap->pflags &= ~ATA_PFLAG_PIO32; 675 } else { 676 if (val != ata_ioc32(ap)) 677 rc = -EINVAL; 678 } 679 spin_unlock_irqrestore(ap->lock, flags); 680 return rc; 681 682 case HDIO_GET_IDENTITY: 683 return ata_get_identity(ap, scsidev, arg); 684 685 case HDIO_DRIVE_CMD: 686 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 687 return -EACCES; 688 return ata_cmd_ioctl(scsidev, arg); 689 690 case HDIO_DRIVE_TASK: 691 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 692 return -EACCES; 693 return ata_task_ioctl(scsidev, arg); 694 695 default: 696 rc = -ENOTTY; 697 break; 698 } 699 700 return rc; 701 } 702 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 703 704 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 705 void __user *arg) 706 { 707 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 708 scsidev, cmd, arg); 709 } 710 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 711 712 /** 713 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 714 * @dev: ATA device to which the new command is attached 715 * @cmd: SCSI command that originated this ATA command 716 * 717 * Obtain a reference to an unused ata_queued_cmd structure, 718 * which is the basic libata structure representing a single 719 * ATA command sent to the hardware. 720 * 721 * If a command was available, fill in the SCSI-specific 722 * portions of the structure with information on the 723 * current command. 724 * 725 * LOCKING: 726 * spin_lock_irqsave(host lock) 727 * 728 * RETURNS: 729 * Command allocated, or %NULL if none available. 730 */ 731 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 732 struct scsi_cmnd *cmd) 733 { 734 struct ata_port *ap = dev->link->ap; 735 struct ata_queued_cmd *qc; 736 int tag; 737 738 if (unlikely(ata_port_is_frozen(ap))) 739 goto fail; 740 741 if (ap->flags & ATA_FLAG_SAS_HOST) { 742 /* 743 * SAS hosts may queue > ATA_MAX_QUEUE commands so use 744 * unique per-device budget token as a tag. 745 */ 746 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE)) 747 goto fail; 748 tag = cmd->budget_token; 749 } else { 750 tag = scsi_cmd_to_rq(cmd)->tag; 751 } 752 753 qc = __ata_qc_from_tag(ap, tag); 754 qc->tag = qc->hw_tag = tag; 755 qc->ap = ap; 756 qc->dev = dev; 757 758 ata_qc_reinit(qc); 759 760 qc->scsicmd = cmd; 761 qc->scsidone = scsi_done; 762 763 qc->sg = scsi_sglist(cmd); 764 qc->n_elem = scsi_sg_count(cmd); 765 766 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 767 qc->flags |= ATA_QCFLAG_QUIET; 768 769 return qc; 770 771 fail: 772 set_host_byte(cmd, DID_OK); 773 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL); 774 scsi_done(cmd); 775 return NULL; 776 } 777 778 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 779 { 780 struct scsi_cmnd *scmd = qc->scsicmd; 781 782 qc->extrabytes = scmd->extra_len; 783 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 784 } 785 786 /** 787 * ata_to_sense_error - convert ATA error to SCSI error 788 * @id: ATA device number 789 * @drv_stat: value contained in ATA status register 790 * @drv_err: value contained in ATA error register 791 * @sk: the sense key we'll fill out 792 * @asc: the additional sense code we'll fill out 793 * @ascq: the additional sense code qualifier we'll fill out 794 * 795 * Converts an ATA error into a SCSI error. Fill out pointers to 796 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 797 * format sense blocks. 798 * 799 * LOCKING: 800 * spin_lock_irqsave(host lock) 801 */ 802 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 803 u8 *asc, u8 *ascq) 804 { 805 int i; 806 807 /* Based on the 3ware driver translation table */ 808 static const unsigned char sense_table[][4] = { 809 /* BBD|ECC|ID|MAR */ 810 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 811 // Device busy Aborted command 812 /* BBD|ECC|ID */ 813 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 814 // Device busy Aborted command 815 /* ECC|MC|MARK */ 816 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 817 // Device fault Hardware error 818 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 819 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 820 // Data CRC error SCSI parity error 821 /* MC|ID|ABRT|TRK0|MARK */ 822 {0x37, NOT_READY, 0x04, 0x00}, 823 // Unit offline Not ready 824 /* MCR|MARK */ 825 {0x09, NOT_READY, 0x04, 0x00}, 826 // Unrecovered disk error Not ready 827 /* Bad address mark */ 828 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 829 // Address mark not found for data field 830 /* TRK0 - Track 0 not found */ 831 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 832 // Hardware error 833 /* Abort: 0x04 is not translated here, see below */ 834 /* Media change request */ 835 {0x08, NOT_READY, 0x04, 0x00}, 836 // FIXME: faking offline 837 /* SRV/IDNF - ID not found */ 838 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 839 // Logical address out of range 840 /* MC - Media Changed */ 841 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 842 // Not ready to ready change, medium may have changed 843 /* ECC - Uncorrectable ECC error */ 844 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 845 // Unrecovered read error 846 /* BBD - block marked bad */ 847 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 848 // Block marked bad Medium error, unrecovered read error 849 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 850 }; 851 static const unsigned char stat_table[][4] = { 852 /* Must be first because BUSY means no other bits valid */ 853 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 854 // Busy, fake parity for now 855 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 856 // Device ready, unaligned write command 857 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 858 // Device fault, internal target failure 859 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 860 // Timed out in xfer, fake parity for now 861 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 862 // Recovered ECC error Medium error, recovered 863 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 864 }; 865 866 /* 867 * Is this an error we can process/parse 868 */ 869 if (drv_stat & ATA_BUSY) { 870 drv_err = 0; /* Ignore the err bits, they're invalid */ 871 } 872 873 if (drv_err) { 874 /* Look for drv_err */ 875 for (i = 0; sense_table[i][0] != 0xFF; i++) { 876 /* Look for best matches first */ 877 if ((sense_table[i][0] & drv_err) == 878 sense_table[i][0]) { 879 *sk = sense_table[i][1]; 880 *asc = sense_table[i][2]; 881 *ascq = sense_table[i][3]; 882 return; 883 } 884 } 885 } 886 887 /* 888 * Fall back to interpreting status bits. Note that if the drv_err 889 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 890 * is not descriptive enough. 891 */ 892 for (i = 0; stat_table[i][0] != 0xFF; i++) { 893 if (stat_table[i][0] & drv_stat) { 894 *sk = stat_table[i][1]; 895 *asc = stat_table[i][2]; 896 *ascq = stat_table[i][3]; 897 return; 898 } 899 } 900 901 /* 902 * We need a sensible error return here, which is tricky, and one 903 * that won't cause people to do things like return a disk wrongly. 904 */ 905 *sk = ABORTED_COMMAND; 906 *asc = 0x00; 907 *ascq = 0x00; 908 } 909 910 /* 911 * ata_gen_passthru_sense - Generate check condition sense block. 912 * @qc: Command that completed. 913 * 914 * This function is specific to the ATA pass through commands. 915 * Regardless of whether the command errored or not, return a sense 916 * block. If there was no error, we get the request from an ATA 917 * passthrough command, so we use the following sense data: 918 * sk = RECOVERED ERROR 919 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 920 * 921 * 922 * LOCKING: 923 * None. 924 */ 925 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 926 { 927 struct scsi_cmnd *cmd = qc->scsicmd; 928 struct ata_taskfile *tf = &qc->result_tf; 929 unsigned char *sb = cmd->sense_buffer; 930 u8 sense_key, asc, ascq; 931 932 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 933 934 /* 935 * Use ata_to_sense_error() to map status register bits 936 * onto sense key, asc & ascq. 937 */ 938 if (qc->err_mask || 939 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 940 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error, 941 &sense_key, &asc, &ascq); 942 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 943 } else { 944 /* ATA PASS-THROUGH INFORMATION AVAILABLE */ 945 ata_scsi_set_sense(qc->dev, cmd, RECOVERED_ERROR, 0, 0x1D); 946 } 947 } 948 949 /** 950 * ata_gen_ata_sense - generate a SCSI fixed sense block 951 * @qc: Command that we are erroring out 952 * 953 * Generate sense block for a failed ATA command @qc. Descriptor 954 * format is used to accommodate LBA48 block address. 955 * 956 * LOCKING: 957 * None. 958 */ 959 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 960 { 961 struct ata_device *dev = qc->dev; 962 struct scsi_cmnd *cmd = qc->scsicmd; 963 struct ata_taskfile *tf = &qc->result_tf; 964 unsigned char *sb = cmd->sense_buffer; 965 u64 block; 966 u8 sense_key, asc, ascq; 967 968 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 969 970 if (ata_dev_disabled(dev)) { 971 /* Device disabled after error recovery */ 972 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 973 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 974 return; 975 } 976 /* Use ata_to_sense_error() to map status register bits 977 * onto sense key, asc & ascq. 978 */ 979 if (qc->err_mask || 980 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 981 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error, 982 &sense_key, &asc, &ascq); 983 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 984 } else { 985 /* Could not decode error */ 986 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 987 tf->status, qc->err_mask); 988 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 989 return; 990 } 991 992 block = ata_tf_read_block(&qc->result_tf, dev); 993 if (block == U64_MAX) 994 return; 995 996 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 997 } 998 999 void ata_scsi_sdev_config(struct scsi_device *sdev) 1000 { 1001 sdev->use_10_for_rw = 1; 1002 sdev->use_10_for_ms = 1; 1003 sdev->no_write_same = 1; 1004 1005 /* Schedule policy is determined by ->qc_defer() callback and 1006 * it needs to see every deferred qc. Set dev_blocked to 1 to 1007 * prevent SCSI midlayer from automatically deferring 1008 * requests. 1009 */ 1010 sdev->max_device_blocked = 1; 1011 } 1012 1013 /** 1014 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1015 * @rq: request to be checked 1016 * 1017 * ATAPI commands which transfer variable length data to host 1018 * might overflow due to application error or hardware bug. This 1019 * function checks whether overflow should be drained and ignored 1020 * for @request. 1021 * 1022 * LOCKING: 1023 * None. 1024 * 1025 * RETURNS: 1026 * 1 if ; otherwise, 0. 1027 */ 1028 bool ata_scsi_dma_need_drain(struct request *rq) 1029 { 1030 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1031 1032 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1033 } 1034 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1035 1036 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1037 { 1038 struct request_queue *q = sdev->request_queue; 1039 int depth = 1; 1040 1041 if (!ata_id_has_unload(dev->id)) 1042 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1043 1044 /* configure max sectors */ 1045 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1046 blk_queue_max_hw_sectors(q, dev->max_sectors); 1047 1048 if (dev->class == ATA_DEV_ATAPI) { 1049 sdev->sector_size = ATA_SECT_SIZE; 1050 1051 /* set DMA padding */ 1052 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1053 1054 /* make room for appending the drain */ 1055 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1056 1057 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1058 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1059 if (!sdev->dma_drain_buf) { 1060 ata_dev_err(dev, "drain buffer allocation failed\n"); 1061 return -ENOMEM; 1062 } 1063 } else { 1064 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1065 1066 /* 1067 * Ask the sd driver to issue START STOP UNIT on runtime suspend 1068 * and resume and shutdown only. For system level suspend/resume, 1069 * devices power state is handled directly by libata EH. 1070 * Given that disks are always spun up on system resume, also 1071 * make sure that the sd driver forces runtime suspended disks 1072 * to be resumed to correctly reflect the power state of the 1073 * device. 1074 */ 1075 sdev->manage_runtime_start_stop = 1; 1076 sdev->manage_shutdown = 1; 1077 sdev->force_runtime_start_on_system_start = 1; 1078 } 1079 1080 /* 1081 * ata_pio_sectors() expects buffer for each sector to not cross 1082 * page boundary. Enforce it by requiring buffers to be sector 1083 * aligned, which works iff sector_size is not larger than 1084 * PAGE_SIZE. ATAPI devices also need the alignment as 1085 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1086 */ 1087 if (sdev->sector_size > PAGE_SIZE) 1088 ata_dev_warn(dev, 1089 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1090 sdev->sector_size); 1091 1092 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1093 1094 if (dev->flags & ATA_DFLAG_AN) 1095 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1096 1097 if (ata_ncq_supported(dev)) 1098 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1099 depth = min(ATA_MAX_QUEUE, depth); 1100 scsi_change_queue_depth(sdev, depth); 1101 1102 if (dev->flags & ATA_DFLAG_TRUSTED) 1103 sdev->security_supported = 1; 1104 1105 dev->sdev = sdev; 1106 return 0; 1107 } 1108 1109 /** 1110 * ata_scsi_slave_alloc - Early setup of SCSI device 1111 * @sdev: SCSI device to examine 1112 * 1113 * This is called from scsi_alloc_sdev() when the scsi device 1114 * associated with an ATA device is scanned on a port. 1115 * 1116 * LOCKING: 1117 * Defined by SCSI layer. We don't really care. 1118 */ 1119 1120 int ata_scsi_slave_alloc(struct scsi_device *sdev) 1121 { 1122 struct ata_port *ap = ata_shost_to_port(sdev->host); 1123 struct device_link *link; 1124 1125 ata_scsi_sdev_config(sdev); 1126 1127 /* 1128 * Create a link from the ata_port device to the scsi device to ensure 1129 * that PM does suspend/resume in the correct order: the scsi device is 1130 * consumer (child) and the ata port the supplier (parent). 1131 */ 1132 link = device_link_add(&sdev->sdev_gendev, &ap->tdev, 1133 DL_FLAG_STATELESS | 1134 DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); 1135 if (!link) { 1136 ata_port_err(ap, "Failed to create link to scsi device %s\n", 1137 dev_name(&sdev->sdev_gendev)); 1138 return -ENODEV; 1139 } 1140 1141 return 0; 1142 } 1143 EXPORT_SYMBOL_GPL(ata_scsi_slave_alloc); 1144 1145 /** 1146 * ata_scsi_slave_config - Set SCSI device attributes 1147 * @sdev: SCSI device to examine 1148 * 1149 * This is called before we actually start reading 1150 * and writing to the device, to configure certain 1151 * SCSI mid-layer behaviors. 1152 * 1153 * LOCKING: 1154 * Defined by SCSI layer. We don't really care. 1155 */ 1156 1157 int ata_scsi_slave_config(struct scsi_device *sdev) 1158 { 1159 struct ata_port *ap = ata_shost_to_port(sdev->host); 1160 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1161 1162 if (dev) 1163 return ata_scsi_dev_config(sdev, dev); 1164 1165 return 0; 1166 } 1167 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1168 1169 /** 1170 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1171 * @sdev: SCSI device to be destroyed 1172 * 1173 * @sdev is about to be destroyed for hot/warm unplugging. If 1174 * this unplugging was initiated by libata as indicated by NULL 1175 * dev->sdev, this function doesn't have to do anything. 1176 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1177 * Clear dev->sdev, schedule the device for ATA detach and invoke 1178 * EH. 1179 * 1180 * LOCKING: 1181 * Defined by SCSI layer. We don't really care. 1182 */ 1183 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1184 { 1185 struct ata_port *ap = ata_shost_to_port(sdev->host); 1186 unsigned long flags; 1187 struct ata_device *dev; 1188 1189 device_link_remove(&sdev->sdev_gendev, &ap->tdev); 1190 1191 spin_lock_irqsave(ap->lock, flags); 1192 dev = __ata_scsi_find_dev(ap, sdev); 1193 if (dev && dev->sdev) { 1194 /* SCSI device already in CANCEL state, no need to offline it */ 1195 dev->sdev = NULL; 1196 dev->flags |= ATA_DFLAG_DETACH; 1197 ata_port_schedule_eh(ap); 1198 } 1199 spin_unlock_irqrestore(ap->lock, flags); 1200 1201 kfree(sdev->dma_drain_buf); 1202 } 1203 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1204 1205 /** 1206 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1207 * @qc: Storage for translated ATA taskfile 1208 * 1209 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1210 * (to start). Perhaps these commands should be preceded by 1211 * CHECK POWER MODE to see what power mode the device is already in. 1212 * [See SAT revision 5 at www.t10.org] 1213 * 1214 * LOCKING: 1215 * spin_lock_irqsave(host lock) 1216 * 1217 * RETURNS: 1218 * Zero on success, non-zero on error. 1219 */ 1220 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1221 { 1222 struct scsi_cmnd *scmd = qc->scsicmd; 1223 struct ata_taskfile *tf = &qc->tf; 1224 const u8 *cdb = scmd->cmnd; 1225 u16 fp; 1226 u8 bp = 0xff; 1227 1228 if (scmd->cmd_len < 5) { 1229 fp = 4; 1230 goto invalid_fld; 1231 } 1232 1233 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1234 tf->protocol = ATA_PROT_NODATA; 1235 if (cdb[1] & 0x1) { 1236 ; /* ignore IMMED bit, violates sat-r05 */ 1237 } 1238 if (cdb[4] & 0x2) { 1239 fp = 4; 1240 bp = 1; 1241 goto invalid_fld; /* LOEJ bit set not supported */ 1242 } 1243 if (((cdb[4] >> 4) & 0xf) != 0) { 1244 fp = 4; 1245 bp = 3; 1246 goto invalid_fld; /* power conditions not supported */ 1247 } 1248 1249 if (cdb[4] & 0x1) { 1250 tf->nsect = 1; /* 1 sector, lba=0 */ 1251 1252 if (qc->dev->flags & ATA_DFLAG_LBA) { 1253 tf->flags |= ATA_TFLAG_LBA; 1254 1255 tf->lbah = 0x0; 1256 tf->lbam = 0x0; 1257 tf->lbal = 0x0; 1258 tf->device |= ATA_LBA; 1259 } else { 1260 /* CHS */ 1261 tf->lbal = 0x1; /* sect */ 1262 tf->lbam = 0x0; /* cyl low */ 1263 tf->lbah = 0x0; /* cyl high */ 1264 } 1265 1266 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1267 } else { 1268 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1269 * or S5) causing some drives to spin up and down again. 1270 */ 1271 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1272 system_state == SYSTEM_POWER_OFF) 1273 goto skip; 1274 1275 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1276 system_entering_hibernation()) 1277 goto skip; 1278 1279 /* Issue ATA STANDBY IMMEDIATE command */ 1280 tf->command = ATA_CMD_STANDBYNOW1; 1281 } 1282 1283 /* 1284 * Standby and Idle condition timers could be implemented but that 1285 * would require libata to implement the Power condition mode page 1286 * and allow the user to change it. Changing mode pages requires 1287 * MODE SELECT to be implemented. 1288 */ 1289 1290 return 0; 1291 1292 invalid_fld: 1293 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1294 return 1; 1295 skip: 1296 scmd->result = SAM_STAT_GOOD; 1297 return 1; 1298 } 1299 1300 1301 /** 1302 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1303 * @qc: Storage for translated ATA taskfile 1304 * 1305 * Sets up an ATA taskfile to issue FLUSH CACHE or 1306 * FLUSH CACHE EXT. 1307 * 1308 * LOCKING: 1309 * spin_lock_irqsave(host lock) 1310 * 1311 * RETURNS: 1312 * Zero on success, non-zero on error. 1313 */ 1314 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1315 { 1316 struct ata_taskfile *tf = &qc->tf; 1317 1318 tf->flags |= ATA_TFLAG_DEVICE; 1319 tf->protocol = ATA_PROT_NODATA; 1320 1321 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1322 tf->command = ATA_CMD_FLUSH_EXT; 1323 else 1324 tf->command = ATA_CMD_FLUSH; 1325 1326 /* flush is critical for IO integrity, consider it an IO command */ 1327 qc->flags |= ATA_QCFLAG_IO; 1328 1329 return 0; 1330 } 1331 1332 /** 1333 * scsi_6_lba_len - Get LBA and transfer length 1334 * @cdb: SCSI command to translate 1335 * 1336 * Calculate LBA and transfer length for 6-byte commands. 1337 * 1338 * RETURNS: 1339 * @plba: the LBA 1340 * @plen: the transfer length 1341 */ 1342 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1343 { 1344 u64 lba = 0; 1345 u32 len; 1346 1347 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1348 lba |= ((u64)cdb[2]) << 8; 1349 lba |= ((u64)cdb[3]); 1350 1351 len = cdb[4]; 1352 1353 *plba = lba; 1354 *plen = len; 1355 } 1356 1357 /** 1358 * scsi_10_lba_len - Get LBA and transfer length 1359 * @cdb: SCSI command to translate 1360 * 1361 * Calculate LBA and transfer length for 10-byte commands. 1362 * 1363 * RETURNS: 1364 * @plba: the LBA 1365 * @plen: the transfer length 1366 */ 1367 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1368 { 1369 *plba = get_unaligned_be32(&cdb[2]); 1370 *plen = get_unaligned_be16(&cdb[7]); 1371 } 1372 1373 /** 1374 * scsi_16_lba_len - Get LBA and transfer length 1375 * @cdb: SCSI command to translate 1376 * 1377 * Calculate LBA and transfer length for 16-byte commands. 1378 * 1379 * RETURNS: 1380 * @plba: the LBA 1381 * @plen: the transfer length 1382 */ 1383 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1384 { 1385 *plba = get_unaligned_be64(&cdb[2]); 1386 *plen = get_unaligned_be32(&cdb[10]); 1387 } 1388 1389 /** 1390 * scsi_dld - Get duration limit descriptor index 1391 * @cdb: SCSI command to translate 1392 * 1393 * Returns the dld bits indicating the index of a command duration limit 1394 * descriptor. 1395 */ 1396 static inline int scsi_dld(const u8 *cdb) 1397 { 1398 return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03); 1399 } 1400 1401 /** 1402 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1403 * @qc: Storage for translated ATA taskfile 1404 * 1405 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1406 * 1407 * LOCKING: 1408 * spin_lock_irqsave(host lock) 1409 * 1410 * RETURNS: 1411 * Zero on success, non-zero on error. 1412 */ 1413 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1414 { 1415 struct scsi_cmnd *scmd = qc->scsicmd; 1416 struct ata_taskfile *tf = &qc->tf; 1417 struct ata_device *dev = qc->dev; 1418 u64 dev_sectors = qc->dev->n_sectors; 1419 const u8 *cdb = scmd->cmnd; 1420 u64 block; 1421 u32 n_block; 1422 u16 fp; 1423 1424 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1425 tf->protocol = ATA_PROT_NODATA; 1426 1427 switch (cdb[0]) { 1428 case VERIFY: 1429 if (scmd->cmd_len < 10) { 1430 fp = 9; 1431 goto invalid_fld; 1432 } 1433 scsi_10_lba_len(cdb, &block, &n_block); 1434 break; 1435 case VERIFY_16: 1436 if (scmd->cmd_len < 16) { 1437 fp = 15; 1438 goto invalid_fld; 1439 } 1440 scsi_16_lba_len(cdb, &block, &n_block); 1441 break; 1442 default: 1443 fp = 0; 1444 goto invalid_fld; 1445 } 1446 1447 if (!n_block) 1448 goto nothing_to_do; 1449 if (block >= dev_sectors) 1450 goto out_of_range; 1451 if ((block + n_block) > dev_sectors) 1452 goto out_of_range; 1453 1454 if (dev->flags & ATA_DFLAG_LBA) { 1455 tf->flags |= ATA_TFLAG_LBA; 1456 1457 if (lba_28_ok(block, n_block)) { 1458 /* use LBA28 */ 1459 tf->command = ATA_CMD_VERIFY; 1460 tf->device |= (block >> 24) & 0xf; 1461 } else if (lba_48_ok(block, n_block)) { 1462 if (!(dev->flags & ATA_DFLAG_LBA48)) 1463 goto out_of_range; 1464 1465 /* use LBA48 */ 1466 tf->flags |= ATA_TFLAG_LBA48; 1467 tf->command = ATA_CMD_VERIFY_EXT; 1468 1469 tf->hob_nsect = (n_block >> 8) & 0xff; 1470 1471 tf->hob_lbah = (block >> 40) & 0xff; 1472 tf->hob_lbam = (block >> 32) & 0xff; 1473 tf->hob_lbal = (block >> 24) & 0xff; 1474 } else 1475 /* request too large even for LBA48 */ 1476 goto out_of_range; 1477 1478 tf->nsect = n_block & 0xff; 1479 1480 tf->lbah = (block >> 16) & 0xff; 1481 tf->lbam = (block >> 8) & 0xff; 1482 tf->lbal = block & 0xff; 1483 1484 tf->device |= ATA_LBA; 1485 } else { 1486 /* CHS */ 1487 u32 sect, head, cyl, track; 1488 1489 if (!lba_28_ok(block, n_block)) 1490 goto out_of_range; 1491 1492 /* Convert LBA to CHS */ 1493 track = (u32)block / dev->sectors; 1494 cyl = track / dev->heads; 1495 head = track % dev->heads; 1496 sect = (u32)block % dev->sectors + 1; 1497 1498 /* Check whether the converted CHS can fit. 1499 Cylinder: 0-65535 1500 Head: 0-15 1501 Sector: 1-255*/ 1502 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1503 goto out_of_range; 1504 1505 tf->command = ATA_CMD_VERIFY; 1506 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1507 tf->lbal = sect; 1508 tf->lbam = cyl; 1509 tf->lbah = cyl >> 8; 1510 tf->device |= head; 1511 } 1512 1513 return 0; 1514 1515 invalid_fld: 1516 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1517 return 1; 1518 1519 out_of_range: 1520 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1521 /* "Logical Block Address out of range" */ 1522 return 1; 1523 1524 nothing_to_do: 1525 scmd->result = SAM_STAT_GOOD; 1526 return 1; 1527 } 1528 1529 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1530 { 1531 struct request *rq = scsi_cmd_to_rq(scmd); 1532 u32 req_blocks; 1533 1534 if (!blk_rq_is_passthrough(rq)) 1535 return true; 1536 1537 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1538 if (n_blocks > req_blocks) 1539 return false; 1540 1541 return true; 1542 } 1543 1544 /** 1545 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1546 * @qc: Storage for translated ATA taskfile 1547 * 1548 * Converts any of six SCSI read/write commands into the 1549 * ATA counterpart, including starting sector (LBA), 1550 * sector count, and taking into account the device's LBA48 1551 * support. 1552 * 1553 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1554 * %WRITE_16 are currently supported. 1555 * 1556 * LOCKING: 1557 * spin_lock_irqsave(host lock) 1558 * 1559 * RETURNS: 1560 * Zero on success, non-zero on error. 1561 */ 1562 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1563 { 1564 struct scsi_cmnd *scmd = qc->scsicmd; 1565 const u8 *cdb = scmd->cmnd; 1566 struct request *rq = scsi_cmd_to_rq(scmd); 1567 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1568 unsigned int tf_flags = 0; 1569 int dld = 0; 1570 u64 block; 1571 u32 n_block; 1572 int rc; 1573 u16 fp = 0; 1574 1575 switch (cdb[0]) { 1576 case WRITE_6: 1577 case WRITE_10: 1578 case WRITE_16: 1579 tf_flags |= ATA_TFLAG_WRITE; 1580 break; 1581 } 1582 1583 /* Calculate the SCSI LBA, transfer length and FUA. */ 1584 switch (cdb[0]) { 1585 case READ_10: 1586 case WRITE_10: 1587 if (unlikely(scmd->cmd_len < 10)) { 1588 fp = 9; 1589 goto invalid_fld; 1590 } 1591 scsi_10_lba_len(cdb, &block, &n_block); 1592 if (cdb[1] & (1 << 3)) 1593 tf_flags |= ATA_TFLAG_FUA; 1594 if (!ata_check_nblocks(scmd, n_block)) 1595 goto invalid_fld; 1596 break; 1597 case READ_6: 1598 case WRITE_6: 1599 if (unlikely(scmd->cmd_len < 6)) { 1600 fp = 5; 1601 goto invalid_fld; 1602 } 1603 scsi_6_lba_len(cdb, &block, &n_block); 1604 1605 /* for 6-byte r/w commands, transfer length 0 1606 * means 256 blocks of data, not 0 block. 1607 */ 1608 if (!n_block) 1609 n_block = 256; 1610 if (!ata_check_nblocks(scmd, n_block)) 1611 goto invalid_fld; 1612 break; 1613 case READ_16: 1614 case WRITE_16: 1615 if (unlikely(scmd->cmd_len < 16)) { 1616 fp = 15; 1617 goto invalid_fld; 1618 } 1619 scsi_16_lba_len(cdb, &block, &n_block); 1620 dld = scsi_dld(cdb); 1621 if (cdb[1] & (1 << 3)) 1622 tf_flags |= ATA_TFLAG_FUA; 1623 if (!ata_check_nblocks(scmd, n_block)) 1624 goto invalid_fld; 1625 break; 1626 default: 1627 fp = 0; 1628 goto invalid_fld; 1629 } 1630 1631 /* Check and compose ATA command */ 1632 if (!n_block) 1633 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1634 * length 0 means transfer 0 block of data. 1635 * However, for ATA R/W commands, sector count 0 means 1636 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1637 * 1638 * WARNING: one or two older ATA drives treat 0 as 0... 1639 */ 1640 goto nothing_to_do; 1641 1642 qc->flags |= ATA_QCFLAG_IO; 1643 qc->nbytes = n_block * scmd->device->sector_size; 1644 1645 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class); 1646 if (likely(rc == 0)) 1647 return 0; 1648 1649 if (rc == -ERANGE) 1650 goto out_of_range; 1651 /* treat all other errors as -EINVAL, fall through */ 1652 invalid_fld: 1653 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1654 return 1; 1655 1656 out_of_range: 1657 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1658 /* "Logical Block Address out of range" */ 1659 return 1; 1660 1661 nothing_to_do: 1662 scmd->result = SAM_STAT_GOOD; 1663 return 1; 1664 } 1665 1666 static void ata_qc_done(struct ata_queued_cmd *qc) 1667 { 1668 struct scsi_cmnd *cmd = qc->scsicmd; 1669 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1670 1671 ata_qc_free(qc); 1672 done(cmd); 1673 } 1674 1675 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1676 { 1677 struct scsi_cmnd *cmd = qc->scsicmd; 1678 u8 *cdb = cmd->cmnd; 1679 bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID; 1680 bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12; 1681 bool is_ck_cond_request = cdb[2] & 0x20; 1682 bool is_error = qc->err_mask != 0; 1683 1684 /* For ATA pass thru (SAT) commands, generate a sense block if 1685 * user mandated it or if there's an error. Note that if we 1686 * generate because the user forced us to [CK_COND=1], a check 1687 * condition is generated and the ATA register values are returned 1688 * whether the command completed successfully or not. If there 1689 * was no error, and CK_COND=1, we use the following sense data: 1690 * sk = RECOVERED ERROR 1691 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1692 */ 1693 if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) { 1694 if (!have_sense) 1695 ata_gen_passthru_sense(qc); 1696 ata_scsi_set_passthru_sense_fields(qc); 1697 if (is_ck_cond_request) 1698 set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); 1699 } else if (is_error && !have_sense) { 1700 ata_gen_ata_sense(qc); 1701 } else { 1702 /* Keep the SCSI ML and status byte, clear host byte. */ 1703 cmd->result &= 0x0000ffff; 1704 } 1705 1706 ata_qc_done(qc); 1707 } 1708 1709 /** 1710 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1711 * @dev: ATA device to which the command is addressed 1712 * @cmd: SCSI command to execute 1713 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1714 * 1715 * Our ->queuecommand() function has decided that the SCSI 1716 * command issued can be directly translated into an ATA 1717 * command, rather than handled internally. 1718 * 1719 * This function sets up an ata_queued_cmd structure for the 1720 * SCSI command, and sends that ata_queued_cmd to the hardware. 1721 * 1722 * The xlat_func argument (actor) returns 0 if ready to execute 1723 * ATA command, else 1 to finish translation. If 1 is returned 1724 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1725 * to be set reflecting an error condition or clean (early) 1726 * termination. 1727 * 1728 * LOCKING: 1729 * spin_lock_irqsave(host lock) 1730 * 1731 * RETURNS: 1732 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1733 * needs to be deferred. 1734 */ 1735 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1736 ata_xlat_func_t xlat_func) 1737 { 1738 struct ata_port *ap = dev->link->ap; 1739 struct ata_queued_cmd *qc; 1740 int rc; 1741 1742 qc = ata_scsi_qc_new(dev, cmd); 1743 if (!qc) 1744 goto err_mem; 1745 1746 /* data is present; dma-map it */ 1747 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1748 cmd->sc_data_direction == DMA_TO_DEVICE) { 1749 if (unlikely(scsi_bufflen(cmd) < 1)) { 1750 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1751 goto err_did; 1752 } 1753 1754 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1755 1756 qc->dma_dir = cmd->sc_data_direction; 1757 } 1758 1759 qc->complete_fn = ata_scsi_qc_complete; 1760 1761 if (xlat_func(qc)) 1762 goto early_finish; 1763 1764 if (ap->ops->qc_defer) { 1765 if ((rc = ap->ops->qc_defer(qc))) 1766 goto defer; 1767 } 1768 1769 /* select device, send command to hardware */ 1770 ata_qc_issue(qc); 1771 1772 return 0; 1773 1774 early_finish: 1775 ata_qc_free(qc); 1776 scsi_done(cmd); 1777 return 0; 1778 1779 err_did: 1780 ata_qc_free(qc); 1781 cmd->result = (DID_ERROR << 16); 1782 scsi_done(cmd); 1783 err_mem: 1784 return 0; 1785 1786 defer: 1787 ata_qc_free(qc); 1788 if (rc == ATA_DEFER_LINK) 1789 return SCSI_MLQUEUE_DEVICE_BUSY; 1790 else 1791 return SCSI_MLQUEUE_HOST_BUSY; 1792 } 1793 1794 struct ata_scsi_args { 1795 struct ata_device *dev; 1796 u16 *id; 1797 struct scsi_cmnd *cmd; 1798 }; 1799 1800 /** 1801 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1802 * @args: device IDENTIFY data / SCSI command of interest. 1803 * @actor: Callback hook for desired SCSI command simulator 1804 * 1805 * Takes care of the hard work of simulating a SCSI command... 1806 * Mapping the response buffer, calling the command's handler, 1807 * and handling the handler's return value. This return value 1808 * indicates whether the handler wishes the SCSI command to be 1809 * completed successfully (0), or not (in which case cmd->result 1810 * and sense buffer are assumed to be set). 1811 * 1812 * LOCKING: 1813 * spin_lock_irqsave(host lock) 1814 */ 1815 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1816 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1817 { 1818 unsigned int rc; 1819 struct scsi_cmnd *cmd = args->cmd; 1820 unsigned long flags; 1821 1822 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1823 1824 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1825 rc = actor(args, ata_scsi_rbuf); 1826 if (rc == 0) 1827 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1828 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1829 1830 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1831 1832 if (rc == 0) 1833 cmd->result = SAM_STAT_GOOD; 1834 } 1835 1836 /** 1837 * ata_scsiop_inq_std - Simulate INQUIRY command 1838 * @args: device IDENTIFY data / SCSI command of interest. 1839 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1840 * 1841 * Returns standard device identification data associated 1842 * with non-VPD INQUIRY command output. 1843 * 1844 * LOCKING: 1845 * spin_lock_irqsave(host lock) 1846 */ 1847 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1848 { 1849 static const u8 versions[] = { 1850 0x00, 1851 0x60, /* SAM-3 (no version claimed) */ 1852 1853 0x03, 1854 0x20, /* SBC-2 (no version claimed) */ 1855 1856 0x03, 1857 0x00 /* SPC-3 (no version claimed) */ 1858 }; 1859 static const u8 versions_zbc[] = { 1860 0x00, 1861 0xA0, /* SAM-5 (no version claimed) */ 1862 1863 0x06, 1864 0x00, /* SBC-4 (no version claimed) */ 1865 1866 0x05, 1867 0xC0, /* SPC-5 (no version claimed) */ 1868 1869 0x60, 1870 0x24, /* ZBC r05 */ 1871 }; 1872 1873 u8 hdr[] = { 1874 TYPE_DISK, 1875 0, 1876 0x5, /* claim SPC-3 version compatibility */ 1877 2, 1878 95 - 4, 1879 0, 1880 0, 1881 2 1882 }; 1883 1884 /* set scsi removable (RMB) bit per ata bit, or if the 1885 * AHCI port says it's external (Hotplug-capable, eSATA). 1886 */ 1887 if (ata_id_removable(args->id) || 1888 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1889 hdr[1] |= (1 << 7); 1890 1891 if (args->dev->class == ATA_DEV_ZAC) { 1892 hdr[0] = TYPE_ZBC; 1893 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1894 } 1895 1896 if (args->dev->flags & ATA_DFLAG_CDL) 1897 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 1898 1899 memcpy(rbuf, hdr, sizeof(hdr)); 1900 memcpy(&rbuf[8], "ATA ", 8); 1901 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1902 1903 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1904 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1905 if (strncmp(&rbuf[32], " ", 4) == 0) 1906 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1907 1908 if (rbuf[32] == 0 || rbuf[32] == ' ') 1909 memcpy(&rbuf[32], "n/a ", 4); 1910 1911 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1912 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1913 else 1914 memcpy(rbuf + 58, versions, sizeof(versions)); 1915 1916 return 0; 1917 } 1918 1919 /** 1920 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1921 * @args: device IDENTIFY data / SCSI command of interest. 1922 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1923 * 1924 * Returns list of inquiry VPD pages available. 1925 * 1926 * LOCKING: 1927 * spin_lock_irqsave(host lock) 1928 */ 1929 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1930 { 1931 int i, num_pages = 0; 1932 static const u8 pages[] = { 1933 0x00, /* page 0x00, this page */ 1934 0x80, /* page 0x80, unit serial no page */ 1935 0x83, /* page 0x83, device ident page */ 1936 0x89, /* page 0x89, ata info page */ 1937 0xb0, /* page 0xb0, block limits page */ 1938 0xb1, /* page 0xb1, block device characteristics page */ 1939 0xb2, /* page 0xb2, thin provisioning page */ 1940 0xb6, /* page 0xb6, zoned block device characteristics */ 1941 0xb9, /* page 0xb9, concurrent positioning ranges */ 1942 }; 1943 1944 for (i = 0; i < sizeof(pages); i++) { 1945 if (pages[i] == 0xb6 && 1946 !(args->dev->flags & ATA_DFLAG_ZAC)) 1947 continue; 1948 rbuf[num_pages + 4] = pages[i]; 1949 num_pages++; 1950 } 1951 rbuf[3] = num_pages; /* number of supported VPD pages */ 1952 return 0; 1953 } 1954 1955 /** 1956 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1957 * @args: device IDENTIFY data / SCSI command of interest. 1958 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1959 * 1960 * Returns ATA device serial number. 1961 * 1962 * LOCKING: 1963 * spin_lock_irqsave(host lock) 1964 */ 1965 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1966 { 1967 static const u8 hdr[] = { 1968 0, 1969 0x80, /* this page code */ 1970 0, 1971 ATA_ID_SERNO_LEN, /* page len */ 1972 }; 1973 1974 memcpy(rbuf, hdr, sizeof(hdr)); 1975 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1976 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1977 return 0; 1978 } 1979 1980 /** 1981 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1982 * @args: device IDENTIFY data / SCSI command of interest. 1983 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1984 * 1985 * Yields two logical unit device identification designators: 1986 * - vendor specific ASCII containing the ATA serial number 1987 * - SAT defined "t10 vendor id based" containing ASCII vendor 1988 * name ("ATA "), model and serial numbers. 1989 * 1990 * LOCKING: 1991 * spin_lock_irqsave(host lock) 1992 */ 1993 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 1994 { 1995 const int sat_model_serial_desc_len = 68; 1996 int num; 1997 1998 rbuf[1] = 0x83; /* this page code */ 1999 num = 4; 2000 2001 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2002 rbuf[num + 0] = 2; 2003 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2004 num += 4; 2005 ata_id_string(args->id, (unsigned char *) rbuf + num, 2006 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2007 num += ATA_ID_SERNO_LEN; 2008 2009 /* SAT defined lu model and serial numbers descriptor */ 2010 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2011 rbuf[num + 0] = 2; 2012 rbuf[num + 1] = 1; 2013 rbuf[num + 3] = sat_model_serial_desc_len; 2014 num += 4; 2015 memcpy(rbuf + num, "ATA ", 8); 2016 num += 8; 2017 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2018 ATA_ID_PROD_LEN); 2019 num += ATA_ID_PROD_LEN; 2020 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2021 ATA_ID_SERNO_LEN); 2022 num += ATA_ID_SERNO_LEN; 2023 2024 if (ata_id_has_wwn(args->id)) { 2025 /* SAT defined lu world wide name */ 2026 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2027 rbuf[num + 0] = 1; 2028 rbuf[num + 1] = 3; 2029 rbuf[num + 3] = ATA_ID_WWN_LEN; 2030 num += 4; 2031 ata_id_string(args->id, (unsigned char *) rbuf + num, 2032 ATA_ID_WWN, ATA_ID_WWN_LEN); 2033 num += ATA_ID_WWN_LEN; 2034 } 2035 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2036 return 0; 2037 } 2038 2039 /** 2040 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2041 * @args: device IDENTIFY data / SCSI command of interest. 2042 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2043 * 2044 * Yields SAT-specified ATA VPD page. 2045 * 2046 * LOCKING: 2047 * spin_lock_irqsave(host lock) 2048 */ 2049 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2050 { 2051 rbuf[1] = 0x89; /* our page code */ 2052 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2053 rbuf[3] = (0x238 & 0xff); 2054 2055 memcpy(&rbuf[8], "linux ", 8); 2056 memcpy(&rbuf[16], "libata ", 16); 2057 memcpy(&rbuf[32], DRV_VERSION, 4); 2058 2059 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2060 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2061 /* TODO: PMP? */ 2062 2063 /* we don't store the ATA device signature, so we fake it */ 2064 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2065 rbuf[40] = 0x1; 2066 rbuf[48] = 0x1; 2067 2068 rbuf[56] = ATA_CMD_ID_ATA; 2069 2070 memcpy(&rbuf[60], &args->id[0], 512); 2071 return 0; 2072 } 2073 2074 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2075 { 2076 struct ata_device *dev = args->dev; 2077 u16 min_io_sectors; 2078 2079 rbuf[1] = 0xb0; 2080 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2081 2082 /* 2083 * Optimal transfer length granularity. 2084 * 2085 * This is always one physical block, but for disks with a smaller 2086 * logical than physical sector size we need to figure out what the 2087 * latter is. 2088 */ 2089 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2090 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2091 2092 /* 2093 * Optimal unmap granularity. 2094 * 2095 * The ATA spec doesn't even know about a granularity or alignment 2096 * for the TRIM command. We can leave away most of the unmap related 2097 * VPD page entries, but we have specifify a granularity to signal 2098 * that we support some form of unmap - in thise case via WRITE SAME 2099 * with the unmap bit set. 2100 */ 2101 if (ata_id_has_trim(args->id)) { 2102 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2103 2104 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2105 max_blocks = 128 << (20 - SECTOR_SHIFT); 2106 2107 put_unaligned_be64(max_blocks, &rbuf[36]); 2108 put_unaligned_be32(1, &rbuf[28]); 2109 } 2110 2111 return 0; 2112 } 2113 2114 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2115 { 2116 int form_factor = ata_id_form_factor(args->id); 2117 int media_rotation_rate = ata_id_rotation_rate(args->id); 2118 u8 zoned = ata_id_zoned_cap(args->id); 2119 2120 rbuf[1] = 0xb1; 2121 rbuf[3] = 0x3c; 2122 rbuf[4] = media_rotation_rate >> 8; 2123 rbuf[5] = media_rotation_rate; 2124 rbuf[7] = form_factor; 2125 if (zoned) 2126 rbuf[8] = (zoned << 4); 2127 2128 return 0; 2129 } 2130 2131 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2132 { 2133 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2134 rbuf[1] = 0xb2; 2135 rbuf[3] = 0x4; 2136 rbuf[5] = 1 << 6; /* TPWS */ 2137 2138 return 0; 2139 } 2140 2141 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2142 { 2143 /* 2144 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2145 */ 2146 rbuf[1] = 0xb6; 2147 rbuf[3] = 0x3C; 2148 2149 /* 2150 * URSWRZ bit is only meaningful for host-managed ZAC drives 2151 */ 2152 if (args->dev->zac_zoned_cap & 1) 2153 rbuf[4] |= 1; 2154 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2155 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2156 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2157 2158 return 0; 2159 } 2160 2161 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2162 { 2163 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2164 u8 *desc = &rbuf[64]; 2165 int i; 2166 2167 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2168 rbuf[1] = 0xb9; 2169 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2170 2171 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2172 desc[0] = cpr_log->cpr[i].num; 2173 desc[1] = cpr_log->cpr[i].num_storage_elements; 2174 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2175 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2176 } 2177 2178 return 0; 2179 } 2180 2181 /** 2182 * modecpy - Prepare response for MODE SENSE 2183 * @dest: output buffer 2184 * @src: data being copied 2185 * @n: length of mode page 2186 * @changeable: whether changeable parameters are requested 2187 * 2188 * Generate a generic MODE SENSE page for either current or changeable 2189 * parameters. 2190 * 2191 * LOCKING: 2192 * None. 2193 */ 2194 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2195 { 2196 if (changeable) { 2197 memcpy(dest, src, 2); 2198 memset(dest + 2, 0, n - 2); 2199 } else { 2200 memcpy(dest, src, n); 2201 } 2202 } 2203 2204 /** 2205 * ata_msense_caching - Simulate MODE SENSE caching info page 2206 * @id: device IDENTIFY data 2207 * @buf: output buffer 2208 * @changeable: whether changeable parameters are requested 2209 * 2210 * Generate a caching info page, which conditionally indicates 2211 * write caching to the SCSI layer, depending on device 2212 * capabilities. 2213 * 2214 * LOCKING: 2215 * None. 2216 */ 2217 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2218 { 2219 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2220 if (changeable) { 2221 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2222 } else { 2223 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2224 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2225 } 2226 return sizeof(def_cache_mpage); 2227 } 2228 2229 /* 2230 * Simulate MODE SENSE control mode page, sub-page 0. 2231 */ 2232 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2233 bool changeable) 2234 { 2235 modecpy(buf, def_control_mpage, 2236 sizeof(def_control_mpage), changeable); 2237 if (changeable) { 2238 /* ata_mselect_control() */ 2239 buf[2] |= (1 << 2); 2240 } else { 2241 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2242 2243 /* descriptor format sense data */ 2244 buf[2] |= (d_sense << 2); 2245 } 2246 2247 return sizeof(def_control_mpage); 2248 } 2249 2250 /* 2251 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2252 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2253 * only, take care of overflows. 2254 */ 2255 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2256 { 2257 u32 limit = get_unaligned_le32(buf); 2258 2259 return min_t(u32, limit / 10000, 65535); 2260 } 2261 2262 /* 2263 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2264 * (command duration limits T2A and T2B mode pages). 2265 */ 2266 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2267 u8 spg) 2268 { 2269 u8 *b, *cdl = dev->cdl, *desc; 2270 u32 policy; 2271 int i; 2272 2273 /* 2274 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2275 * are a header. The PAGE LENGTH field is the size of the page 2276 * excluding the header. 2277 */ 2278 buf[0] = CONTROL_MPAGE; 2279 buf[1] = spg; 2280 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2281 if (spg == CDL_T2A_SUB_MPAGE) { 2282 /* 2283 * Read descriptors map to the T2A page: 2284 * set perf_vs_duration_guidleine. 2285 */ 2286 buf[7] = (cdl[0] & 0x03) << 4; 2287 desc = cdl + 64; 2288 } else { 2289 /* Write descriptors map to the T2B page */ 2290 desc = cdl + 288; 2291 } 2292 2293 /* Fill the T2 page descriptors */ 2294 b = &buf[8]; 2295 policy = get_unaligned_le32(&cdl[0]); 2296 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2297 /* t2cdlunits: fixed to 10ms */ 2298 b[0] = 0x0a; 2299 2300 /* Max inactive time and its policy */ 2301 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2302 b[6] = ((policy >> 8) & 0x0f) << 4; 2303 2304 /* Max active time and its policy */ 2305 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2306 b[6] |= (policy >> 4) & 0x0f; 2307 2308 /* Command duration guideline and its policy */ 2309 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2310 b[14] = policy & 0x0f; 2311 } 2312 2313 return CDL_T2_SUB_MPAGE_LEN; 2314 } 2315 2316 /* 2317 * Simulate MODE SENSE control mode page, sub-page f2h 2318 * (ATA feature control mode page). 2319 */ 2320 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2321 u8 *buf) 2322 { 2323 /* PS=0, SPF=1 */ 2324 buf[0] = CONTROL_MPAGE | (1 << 6); 2325 buf[1] = ATA_FEATURE_SUB_MPAGE; 2326 2327 /* 2328 * The first four bytes of ATA Feature Control mode page are a header. 2329 * The PAGE LENGTH field is the size of the page excluding the header. 2330 */ 2331 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2332 2333 if (dev->flags & ATA_DFLAG_CDL) 2334 buf[4] = 0x02; /* Support T2A and T2B pages */ 2335 else 2336 buf[4] = 0; 2337 2338 return ATA_FEATURE_SUB_MPAGE_LEN; 2339 } 2340 2341 /** 2342 * ata_msense_control - Simulate MODE SENSE control mode page 2343 * @dev: ATA device of interest 2344 * @buf: output buffer 2345 * @spg: sub-page code 2346 * @changeable: whether changeable parameters are requested 2347 * 2348 * Generate a generic MODE SENSE control mode page. 2349 * 2350 * LOCKING: 2351 * None. 2352 */ 2353 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2354 u8 spg, bool changeable) 2355 { 2356 unsigned int n; 2357 2358 switch (spg) { 2359 case 0: 2360 return ata_msense_control_spg0(dev, buf, changeable); 2361 case CDL_T2A_SUB_MPAGE: 2362 case CDL_T2B_SUB_MPAGE: 2363 return ata_msense_control_spgt2(dev, buf, spg); 2364 case ATA_FEATURE_SUB_MPAGE: 2365 return ata_msense_control_ata_feature(dev, buf); 2366 case ALL_SUB_MPAGES: 2367 n = ata_msense_control_spg0(dev, buf, changeable); 2368 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2369 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2370 n += ata_msense_control_ata_feature(dev, buf + n); 2371 return n; 2372 default: 2373 return 0; 2374 } 2375 } 2376 2377 /** 2378 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2379 * @buf: output buffer 2380 * @changeable: whether changeable parameters are requested 2381 * 2382 * Generate a generic MODE SENSE r/w error recovery page. 2383 * 2384 * LOCKING: 2385 * None. 2386 */ 2387 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2388 { 2389 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2390 changeable); 2391 return sizeof(def_rw_recovery_mpage); 2392 } 2393 2394 /** 2395 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2396 * @args: device IDENTIFY data / SCSI command of interest. 2397 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2398 * 2399 * Simulate MODE SENSE commands. Assume this is invoked for direct 2400 * access devices (e.g. disks) only. There should be no block 2401 * descriptor for other device types. 2402 * 2403 * LOCKING: 2404 * spin_lock_irqsave(host lock) 2405 */ 2406 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2407 { 2408 struct ata_device *dev = args->dev; 2409 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2410 static const u8 sat_blk_desc[] = { 2411 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2412 0, 2413 0, 0x2, 0x0 /* block length: 512 bytes */ 2414 }; 2415 u8 pg, spg; 2416 unsigned int ebd, page_control, six_byte; 2417 u8 dpofua = 0, bp = 0xff; 2418 u16 fp; 2419 2420 six_byte = (scsicmd[0] == MODE_SENSE); 2421 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2422 /* 2423 * LLBA bit in msense(10) ignored (compliant) 2424 */ 2425 2426 page_control = scsicmd[2] >> 6; 2427 switch (page_control) { 2428 case 0: /* current */ 2429 case 1: /* changeable */ 2430 case 2: /* defaults */ 2431 break; /* supported */ 2432 case 3: /* saved */ 2433 goto saving_not_supp; 2434 default: 2435 fp = 2; 2436 bp = 6; 2437 goto invalid_fld; 2438 } 2439 2440 if (six_byte) 2441 p += 4 + (ebd ? 8 : 0); 2442 else 2443 p += 8 + (ebd ? 8 : 0); 2444 2445 pg = scsicmd[2] & 0x3f; 2446 spg = scsicmd[3]; 2447 2448 /* 2449 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2450 * the control page. 2451 */ 2452 if (spg) { 2453 switch (spg) { 2454 case ALL_SUB_MPAGES: 2455 break; 2456 case CDL_T2A_SUB_MPAGE: 2457 case CDL_T2B_SUB_MPAGE: 2458 case ATA_FEATURE_SUB_MPAGE: 2459 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2460 break; 2461 fallthrough; 2462 default: 2463 fp = 3; 2464 goto invalid_fld; 2465 } 2466 } 2467 2468 switch(pg) { 2469 case RW_RECOVERY_MPAGE: 2470 p += ata_msense_rw_recovery(p, page_control == 1); 2471 break; 2472 2473 case CACHE_MPAGE: 2474 p += ata_msense_caching(args->id, p, page_control == 1); 2475 break; 2476 2477 case CONTROL_MPAGE: 2478 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2479 break; 2480 2481 case ALL_MPAGES: 2482 p += ata_msense_rw_recovery(p, page_control == 1); 2483 p += ata_msense_caching(args->id, p, page_control == 1); 2484 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2485 break; 2486 2487 default: /* invalid page code */ 2488 fp = 2; 2489 goto invalid_fld; 2490 } 2491 2492 if (dev->flags & ATA_DFLAG_FUA) 2493 dpofua = 1 << 4; 2494 2495 if (six_byte) { 2496 rbuf[0] = p - rbuf - 1; 2497 rbuf[2] |= dpofua; 2498 if (ebd) { 2499 rbuf[3] = sizeof(sat_blk_desc); 2500 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2501 } 2502 } else { 2503 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2504 rbuf[3] |= dpofua; 2505 if (ebd) { 2506 rbuf[7] = sizeof(sat_blk_desc); 2507 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2508 } 2509 } 2510 return 0; 2511 2512 invalid_fld: 2513 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2514 return 1; 2515 2516 saving_not_supp: 2517 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2518 /* "Saving parameters not supported" */ 2519 return 1; 2520 } 2521 2522 /** 2523 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2524 * @args: device IDENTIFY data / SCSI command of interest. 2525 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2526 * 2527 * Simulate READ CAPACITY commands. 2528 * 2529 * LOCKING: 2530 * None. 2531 */ 2532 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2533 { 2534 struct ata_device *dev = args->dev; 2535 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2536 u32 sector_size; /* physical sector size in bytes */ 2537 u8 log2_per_phys; 2538 u16 lowest_aligned; 2539 2540 sector_size = ata_id_logical_sector_size(dev->id); 2541 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2542 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2543 2544 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2545 if (last_lba >= 0xffffffffULL) 2546 last_lba = 0xffffffff; 2547 2548 /* sector count, 32-bit */ 2549 rbuf[0] = last_lba >> (8 * 3); 2550 rbuf[1] = last_lba >> (8 * 2); 2551 rbuf[2] = last_lba >> (8 * 1); 2552 rbuf[3] = last_lba; 2553 2554 /* sector size */ 2555 rbuf[4] = sector_size >> (8 * 3); 2556 rbuf[5] = sector_size >> (8 * 2); 2557 rbuf[6] = sector_size >> (8 * 1); 2558 rbuf[7] = sector_size; 2559 } else { 2560 /* sector count, 64-bit */ 2561 rbuf[0] = last_lba >> (8 * 7); 2562 rbuf[1] = last_lba >> (8 * 6); 2563 rbuf[2] = last_lba >> (8 * 5); 2564 rbuf[3] = last_lba >> (8 * 4); 2565 rbuf[4] = last_lba >> (8 * 3); 2566 rbuf[5] = last_lba >> (8 * 2); 2567 rbuf[6] = last_lba >> (8 * 1); 2568 rbuf[7] = last_lba; 2569 2570 /* sector size */ 2571 rbuf[ 8] = sector_size >> (8 * 3); 2572 rbuf[ 9] = sector_size >> (8 * 2); 2573 rbuf[10] = sector_size >> (8 * 1); 2574 rbuf[11] = sector_size; 2575 2576 rbuf[12] = 0; 2577 rbuf[13] = log2_per_phys; 2578 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2579 rbuf[15] = lowest_aligned; 2580 2581 if (ata_id_has_trim(args->id) && 2582 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2583 rbuf[14] |= 0x80; /* LBPME */ 2584 2585 if (ata_id_has_zero_after_trim(args->id) && 2586 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2587 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2588 rbuf[14] |= 0x40; /* LBPRZ */ 2589 } 2590 } 2591 if (ata_id_zoned_cap(args->id) || 2592 args->dev->class == ATA_DEV_ZAC) 2593 rbuf[12] = (1 << 4); /* RC_BASIS */ 2594 } 2595 return 0; 2596 } 2597 2598 /** 2599 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2600 * @args: device IDENTIFY data / SCSI command of interest. 2601 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2602 * 2603 * Simulate REPORT LUNS command. 2604 * 2605 * LOCKING: 2606 * spin_lock_irqsave(host lock) 2607 */ 2608 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2609 { 2610 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2611 2612 return 0; 2613 } 2614 2615 /* 2616 * ATAPI devices typically report zero for their SCSI version, and sometimes 2617 * deviate from the spec WRT response data format. If SCSI version is 2618 * reported as zero like normal, then we make the following fixups: 2619 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2620 * modern device. 2621 * 2) Ensure response data format / ATAPI information are always correct. 2622 */ 2623 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2624 { 2625 u8 buf[4]; 2626 2627 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2628 if (buf[2] == 0) { 2629 buf[2] = 0x5; 2630 buf[3] = 0x32; 2631 } 2632 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2633 } 2634 2635 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2636 { 2637 struct scsi_cmnd *cmd = qc->scsicmd; 2638 unsigned int err_mask = qc->err_mask; 2639 2640 /* handle completion from EH */ 2641 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2642 2643 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2644 ata_gen_passthru_sense(qc); 2645 2646 /* SCSI EH automatically locks door if sdev->locked is 2647 * set. Sometimes door lock request continues to 2648 * fail, for example, when no media is present. This 2649 * creates a loop - SCSI EH issues door lock which 2650 * fails and gets invoked again to acquire sense data 2651 * for the failed command. 2652 * 2653 * If door lock fails, always clear sdev->locked to 2654 * avoid this infinite loop. 2655 * 2656 * This may happen before SCSI scan is complete. Make 2657 * sure qc->dev->sdev isn't NULL before dereferencing. 2658 */ 2659 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2660 qc->dev->sdev->locked = 0; 2661 2662 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2663 ata_qc_done(qc); 2664 return; 2665 } 2666 2667 /* successful completion path */ 2668 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2669 atapi_fixup_inquiry(cmd); 2670 cmd->result = SAM_STAT_GOOD; 2671 2672 ata_qc_done(qc); 2673 } 2674 /** 2675 * atapi_xlat - Initialize PACKET taskfile 2676 * @qc: command structure to be initialized 2677 * 2678 * LOCKING: 2679 * spin_lock_irqsave(host lock) 2680 * 2681 * RETURNS: 2682 * Zero on success, non-zero on failure. 2683 */ 2684 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2685 { 2686 struct scsi_cmnd *scmd = qc->scsicmd; 2687 struct ata_device *dev = qc->dev; 2688 int nodata = (scmd->sc_data_direction == DMA_NONE); 2689 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2690 unsigned int nbytes; 2691 2692 memset(qc->cdb, 0, dev->cdb_len); 2693 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2694 2695 qc->complete_fn = atapi_qc_complete; 2696 2697 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2698 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2699 qc->tf.flags |= ATA_TFLAG_WRITE; 2700 } 2701 2702 qc->tf.command = ATA_CMD_PACKET; 2703 ata_qc_set_pc_nbytes(qc); 2704 2705 /* check whether ATAPI DMA is safe */ 2706 if (!nodata && !using_pio && atapi_check_dma(qc)) 2707 using_pio = 1; 2708 2709 /* Some controller variants snoop this value for Packet 2710 * transfers to do state machine and FIFO management. Thus we 2711 * want to set it properly, and for DMA where it is 2712 * effectively meaningless. 2713 */ 2714 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2715 2716 /* Most ATAPI devices which honor transfer chunk size don't 2717 * behave according to the spec when odd chunk size which 2718 * matches the transfer length is specified. If the number of 2719 * bytes to transfer is 2n+1. According to the spec, what 2720 * should happen is to indicate that 2n+1 is going to be 2721 * transferred and transfer 2n+2 bytes where the last byte is 2722 * padding. 2723 * 2724 * In practice, this doesn't happen. ATAPI devices first 2725 * indicate and transfer 2n bytes and then indicate and 2726 * transfer 2 bytes where the last byte is padding. 2727 * 2728 * This inconsistency confuses several controllers which 2729 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2730 * These controllers use actual number of transferred bytes to 2731 * update DMA pointer and transfer of 4n+2 bytes make those 2732 * controller push DMA pointer by 4n+4 bytes because SATA data 2733 * FISes are aligned to 4 bytes. This causes data corruption 2734 * and buffer overrun. 2735 * 2736 * Always setting nbytes to even number solves this problem 2737 * because then ATAPI devices don't have to split data at 2n 2738 * boundaries. 2739 */ 2740 if (nbytes & 0x1) 2741 nbytes++; 2742 2743 qc->tf.lbam = (nbytes & 0xFF); 2744 qc->tf.lbah = (nbytes >> 8); 2745 2746 if (nodata) 2747 qc->tf.protocol = ATAPI_PROT_NODATA; 2748 else if (using_pio) 2749 qc->tf.protocol = ATAPI_PROT_PIO; 2750 else { 2751 /* DMA data xfer */ 2752 qc->tf.protocol = ATAPI_PROT_DMA; 2753 qc->tf.feature |= ATAPI_PKT_DMA; 2754 2755 if ((dev->flags & ATA_DFLAG_DMADIR) && 2756 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2757 /* some SATA bridges need us to indicate data xfer direction */ 2758 qc->tf.feature |= ATAPI_DMADIR; 2759 } 2760 2761 2762 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2763 as ATAPI tape drives don't get this right otherwise */ 2764 return 0; 2765 } 2766 2767 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 2768 { 2769 /* 2770 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 2771 * or 2 (IDE master + slave case). However, the former case includes 2772 * libsas hosted devices which are numbered per scsi host, leading 2773 * to devno potentially being larger than 0 but with each struct 2774 * ata_device having its own struct ata_port and struct ata_link. 2775 * To accommodate these, ignore devno and always use device number 0. 2776 */ 2777 if (likely(!sata_pmp_attached(ap))) { 2778 int link_max_devices = ata_link_max_devices(&ap->link); 2779 2780 if (link_max_devices == 1) 2781 return &ap->link.device[0]; 2782 2783 if (devno < link_max_devices) 2784 return &ap->link.device[devno]; 2785 2786 return NULL; 2787 } 2788 2789 /* 2790 * For PMP-attached devices, the device number corresponds to C 2791 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 2792 * for the device. 2793 */ 2794 if (devno < ap->nr_pmp_links) 2795 return &ap->pmp_link[devno].device[0]; 2796 2797 return NULL; 2798 } 2799 2800 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2801 const struct scsi_device *scsidev) 2802 { 2803 int devno; 2804 2805 /* skip commands not addressed to targets we simulate */ 2806 if (!sata_pmp_attached(ap)) { 2807 if (unlikely(scsidev->channel || scsidev->lun)) 2808 return NULL; 2809 devno = scsidev->id; 2810 } else { 2811 if (unlikely(scsidev->id || scsidev->lun)) 2812 return NULL; 2813 devno = scsidev->channel; 2814 } 2815 2816 return ata_find_dev(ap, devno); 2817 } 2818 2819 /** 2820 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2821 * @ap: ATA port to which the device is attached 2822 * @scsidev: SCSI device from which we derive the ATA device 2823 * 2824 * Given various information provided in struct scsi_cmnd, 2825 * map that onto an ATA bus, and using that mapping 2826 * determine which ata_device is associated with the 2827 * SCSI command to be sent. 2828 * 2829 * LOCKING: 2830 * spin_lock_irqsave(host lock) 2831 * 2832 * RETURNS: 2833 * Associated ATA device, or %NULL if not found. 2834 */ 2835 struct ata_device * 2836 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2837 { 2838 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2839 2840 if (unlikely(!dev || !ata_dev_enabled(dev))) 2841 return NULL; 2842 2843 return dev; 2844 } 2845 2846 /* 2847 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2848 * @byte1: Byte 1 from pass-thru CDB. 2849 * 2850 * RETURNS: 2851 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2852 */ 2853 static u8 2854 ata_scsi_map_proto(u8 byte1) 2855 { 2856 switch((byte1 & 0x1e) >> 1) { 2857 case 3: /* Non-data */ 2858 return ATA_PROT_NODATA; 2859 2860 case 6: /* DMA */ 2861 case 10: /* UDMA Data-in */ 2862 case 11: /* UDMA Data-Out */ 2863 return ATA_PROT_DMA; 2864 2865 case 4: /* PIO Data-in */ 2866 case 5: /* PIO Data-out */ 2867 return ATA_PROT_PIO; 2868 2869 case 12: /* FPDMA */ 2870 return ATA_PROT_NCQ; 2871 2872 case 0: /* Hard Reset */ 2873 case 1: /* SRST */ 2874 case 8: /* Device Diagnostic */ 2875 case 9: /* Device Reset */ 2876 case 7: /* DMA Queued */ 2877 case 15: /* Return Response Info */ 2878 default: /* Reserved */ 2879 break; 2880 } 2881 2882 return ATA_PROT_UNKNOWN; 2883 } 2884 2885 /** 2886 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2887 * @qc: command structure to be initialized 2888 * 2889 * Handles either 12, 16, or 32-byte versions of the CDB. 2890 * 2891 * RETURNS: 2892 * Zero on success, non-zero on failure. 2893 */ 2894 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2895 { 2896 struct ata_taskfile *tf = &(qc->tf); 2897 struct scsi_cmnd *scmd = qc->scsicmd; 2898 struct ata_device *dev = qc->dev; 2899 const u8 *cdb = scmd->cmnd; 2900 u16 fp; 2901 u16 cdb_offset = 0; 2902 2903 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2904 if (cdb[0] == VARIABLE_LENGTH_CMD) 2905 cdb_offset = 9; 2906 2907 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2908 if (tf->protocol == ATA_PROT_UNKNOWN) { 2909 fp = 1; 2910 goto invalid_fld; 2911 } 2912 2913 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 2914 /* 2915 * When T_LENGTH is zero (No data is transferred), dir should 2916 * be DMA_NONE. 2917 */ 2918 if (scmd->sc_data_direction != DMA_NONE) { 2919 fp = 2 + cdb_offset; 2920 goto invalid_fld; 2921 } 2922 2923 if (ata_is_ncq(tf->protocol)) 2924 tf->protocol = ATA_PROT_NCQ_NODATA; 2925 } 2926 2927 /* enable LBA */ 2928 tf->flags |= ATA_TFLAG_LBA; 2929 2930 /* 2931 * 12 and 16 byte CDBs use different offsets to 2932 * provide the various register values. 2933 */ 2934 switch (cdb[0]) { 2935 case ATA_16: 2936 /* 2937 * 16-byte CDB - may contain extended commands. 2938 * 2939 * If that is the case, copy the upper byte register values. 2940 */ 2941 if (cdb[1] & 0x01) { 2942 tf->hob_feature = cdb[3]; 2943 tf->hob_nsect = cdb[5]; 2944 tf->hob_lbal = cdb[7]; 2945 tf->hob_lbam = cdb[9]; 2946 tf->hob_lbah = cdb[11]; 2947 tf->flags |= ATA_TFLAG_LBA48; 2948 } else 2949 tf->flags &= ~ATA_TFLAG_LBA48; 2950 2951 /* 2952 * Always copy low byte, device and command registers. 2953 */ 2954 tf->feature = cdb[4]; 2955 tf->nsect = cdb[6]; 2956 tf->lbal = cdb[8]; 2957 tf->lbam = cdb[10]; 2958 tf->lbah = cdb[12]; 2959 tf->device = cdb[13]; 2960 tf->command = cdb[14]; 2961 break; 2962 case ATA_12: 2963 /* 2964 * 12-byte CDB - incapable of extended commands. 2965 */ 2966 tf->flags &= ~ATA_TFLAG_LBA48; 2967 2968 tf->feature = cdb[3]; 2969 tf->nsect = cdb[4]; 2970 tf->lbal = cdb[5]; 2971 tf->lbam = cdb[6]; 2972 tf->lbah = cdb[7]; 2973 tf->device = cdb[8]; 2974 tf->command = cdb[9]; 2975 break; 2976 default: 2977 /* 2978 * 32-byte CDB - may contain extended command fields. 2979 * 2980 * If that is the case, copy the upper byte register values. 2981 */ 2982 if (cdb[10] & 0x01) { 2983 tf->hob_feature = cdb[20]; 2984 tf->hob_nsect = cdb[22]; 2985 tf->hob_lbal = cdb[16]; 2986 tf->hob_lbam = cdb[15]; 2987 tf->hob_lbah = cdb[14]; 2988 tf->flags |= ATA_TFLAG_LBA48; 2989 } else 2990 tf->flags &= ~ATA_TFLAG_LBA48; 2991 2992 tf->feature = cdb[21]; 2993 tf->nsect = cdb[23]; 2994 tf->lbal = cdb[19]; 2995 tf->lbam = cdb[18]; 2996 tf->lbah = cdb[17]; 2997 tf->device = cdb[24]; 2998 tf->command = cdb[25]; 2999 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3000 break; 3001 } 3002 3003 /* For NCQ commands copy the tag value */ 3004 if (ata_is_ncq(tf->protocol)) 3005 tf->nsect = qc->hw_tag << 3; 3006 3007 /* enforce correct master/slave bit */ 3008 tf->device = dev->devno ? 3009 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3010 3011 switch (tf->command) { 3012 /* READ/WRITE LONG use a non-standard sect_size */ 3013 case ATA_CMD_READ_LONG: 3014 case ATA_CMD_READ_LONG_ONCE: 3015 case ATA_CMD_WRITE_LONG: 3016 case ATA_CMD_WRITE_LONG_ONCE: 3017 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3018 fp = 1; 3019 goto invalid_fld; 3020 } 3021 qc->sect_size = scsi_bufflen(scmd); 3022 break; 3023 3024 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3025 case ATA_CMD_CFA_WRITE_NE: 3026 case ATA_CMD_CFA_TRANS_SECT: 3027 case ATA_CMD_CFA_WRITE_MULT_NE: 3028 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3029 case ATA_CMD_READ: 3030 case ATA_CMD_READ_EXT: 3031 case ATA_CMD_READ_QUEUED: 3032 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3033 case ATA_CMD_FPDMA_READ: 3034 case ATA_CMD_READ_MULTI: 3035 case ATA_CMD_READ_MULTI_EXT: 3036 case ATA_CMD_PIO_READ: 3037 case ATA_CMD_PIO_READ_EXT: 3038 case ATA_CMD_READ_STREAM_DMA_EXT: 3039 case ATA_CMD_READ_STREAM_EXT: 3040 case ATA_CMD_VERIFY: 3041 case ATA_CMD_VERIFY_EXT: 3042 case ATA_CMD_WRITE: 3043 case ATA_CMD_WRITE_EXT: 3044 case ATA_CMD_WRITE_FUA_EXT: 3045 case ATA_CMD_WRITE_QUEUED: 3046 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3047 case ATA_CMD_FPDMA_WRITE: 3048 case ATA_CMD_WRITE_MULTI: 3049 case ATA_CMD_WRITE_MULTI_EXT: 3050 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3051 case ATA_CMD_PIO_WRITE: 3052 case ATA_CMD_PIO_WRITE_EXT: 3053 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3054 case ATA_CMD_WRITE_STREAM_EXT: 3055 qc->sect_size = scmd->device->sector_size; 3056 break; 3057 3058 /* Everything else uses 512 byte "sectors" */ 3059 default: 3060 qc->sect_size = ATA_SECT_SIZE; 3061 } 3062 3063 /* 3064 * Set flags so that all registers will be written, pass on 3065 * write indication (used for PIO/DMA setup), result TF is 3066 * copied back and we don't whine too much about its failure. 3067 */ 3068 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3069 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3070 tf->flags |= ATA_TFLAG_WRITE; 3071 3072 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3073 3074 /* 3075 * Set transfer length. 3076 * 3077 * TODO: find out if we need to do more here to 3078 * cover scatter/gather case. 3079 */ 3080 ata_qc_set_pc_nbytes(qc); 3081 3082 /* We may not issue DMA commands if no DMA mode is set */ 3083 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3084 fp = 1; 3085 goto invalid_fld; 3086 } 3087 3088 /* We may not issue NCQ commands to devices not supporting NCQ */ 3089 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3090 fp = 1; 3091 goto invalid_fld; 3092 } 3093 3094 /* sanity check for pio multi commands */ 3095 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3096 fp = 1; 3097 goto invalid_fld; 3098 } 3099 3100 if (is_multi_taskfile(tf)) { 3101 unsigned int multi_count = 1 << (cdb[1] >> 5); 3102 3103 /* compare the passed through multi_count 3104 * with the cached multi_count of libata 3105 */ 3106 if (multi_count != dev->multi_count) 3107 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3108 multi_count); 3109 } 3110 3111 /* 3112 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3113 * SET_FEATURES - XFER MODE must be preceded/succeeded 3114 * by an update to hardware-specific registers for each 3115 * controller (i.e. the reason for ->set_piomode(), 3116 * ->set_dmamode(), and ->post_set_mode() hooks). 3117 */ 3118 if (tf->command == ATA_CMD_SET_FEATURES && 3119 tf->feature == SETFEATURES_XFER) { 3120 fp = (cdb[0] == ATA_16) ? 4 : 3; 3121 goto invalid_fld; 3122 } 3123 3124 /* 3125 * Filter TPM commands by default. These provide an 3126 * essentially uncontrolled encrypted "back door" between 3127 * applications and the disk. Set libata.allow_tpm=1 if you 3128 * have a real reason for wanting to use them. This ensures 3129 * that installed software cannot easily mess stuff up without 3130 * user intent. DVR type users will probably ship with this enabled 3131 * for movie content management. 3132 * 3133 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3134 * for this and should do in future but that it is not sufficient as 3135 * DCS is an optional feature set. Thus we also do the software filter 3136 * so that we comply with the TC consortium stated goal that the user 3137 * can turn off TC features of their system. 3138 */ 3139 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3140 fp = (cdb[0] == ATA_16) ? 14 : 9; 3141 goto invalid_fld; 3142 } 3143 3144 return 0; 3145 3146 invalid_fld: 3147 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3148 return 1; 3149 } 3150 3151 /** 3152 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3153 * @cmd: SCSI command being translated 3154 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3155 * @sector: Starting sector 3156 * @count: Total Range of request in logical sectors 3157 * 3158 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3159 * descriptor. 3160 * 3161 * Upto 64 entries of the format: 3162 * 63:48 Range Length 3163 * 47:0 LBA 3164 * 3165 * Range Length of 0 is ignored. 3166 * LBA's should be sorted order and not overlap. 3167 * 3168 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3169 * 3170 * Return: Number of bytes copied into sglist. 3171 */ 3172 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3173 u64 sector, u32 count) 3174 { 3175 struct scsi_device *sdp = cmd->device; 3176 size_t len = sdp->sector_size; 3177 size_t r; 3178 __le64 *buf; 3179 u32 i = 0; 3180 unsigned long flags; 3181 3182 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3183 3184 if (len > ATA_SCSI_RBUF_SIZE) 3185 len = ATA_SCSI_RBUF_SIZE; 3186 3187 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3188 buf = ((void *)ata_scsi_rbuf); 3189 memset(buf, 0, len); 3190 while (i < trmax) { 3191 u64 entry = sector | 3192 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3193 buf[i++] = __cpu_to_le64(entry); 3194 if (count <= 0xffff) 3195 break; 3196 count -= 0xffff; 3197 sector += 0xffff; 3198 } 3199 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3200 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3201 3202 return r; 3203 } 3204 3205 /** 3206 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3207 * @qc: Command to be translated 3208 * 3209 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3210 * an SCT Write Same command. 3211 * Based on WRITE SAME has the UNMAP flag: 3212 * 3213 * - When set translate to DSM TRIM 3214 * - When clear translate to SCT Write Same 3215 */ 3216 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3217 { 3218 struct ata_taskfile *tf = &qc->tf; 3219 struct scsi_cmnd *scmd = qc->scsicmd; 3220 struct scsi_device *sdp = scmd->device; 3221 size_t len = sdp->sector_size; 3222 struct ata_device *dev = qc->dev; 3223 const u8 *cdb = scmd->cmnd; 3224 u64 block; 3225 u32 n_block; 3226 const u32 trmax = len >> 3; 3227 u32 size; 3228 u16 fp; 3229 u8 bp = 0xff; 3230 u8 unmap = cdb[1] & 0x8; 3231 3232 /* we may not issue DMA commands if no DMA mode is set */ 3233 if (unlikely(!ata_dma_enabled(dev))) 3234 goto invalid_opcode; 3235 3236 /* 3237 * We only allow sending this command through the block layer, 3238 * as it modifies the DATA OUT buffer, which would corrupt user 3239 * memory for SG_IO commands. 3240 */ 3241 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3242 goto invalid_opcode; 3243 3244 if (unlikely(scmd->cmd_len < 16)) { 3245 fp = 15; 3246 goto invalid_fld; 3247 } 3248 scsi_16_lba_len(cdb, &block, &n_block); 3249 3250 if (!unmap || 3251 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3252 !ata_id_has_trim(dev->id)) { 3253 fp = 1; 3254 bp = 3; 3255 goto invalid_fld; 3256 } 3257 /* If the request is too large the cmd is invalid */ 3258 if (n_block > 0xffff * trmax) { 3259 fp = 2; 3260 goto invalid_fld; 3261 } 3262 3263 /* 3264 * WRITE SAME always has a sector sized buffer as payload, this 3265 * should never be a multiple entry S/G list. 3266 */ 3267 if (!scsi_sg_count(scmd)) 3268 goto invalid_param_len; 3269 3270 /* 3271 * size must match sector size in bytes 3272 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3273 * is defined as number of 512 byte blocks to be transferred. 3274 */ 3275 3276 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3277 if (size != len) 3278 goto invalid_param_len; 3279 3280 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3281 /* Newer devices support queued TRIM commands */ 3282 tf->protocol = ATA_PROT_NCQ; 3283 tf->command = ATA_CMD_FPDMA_SEND; 3284 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3285 tf->nsect = qc->hw_tag << 3; 3286 tf->hob_feature = (size / 512) >> 8; 3287 tf->feature = size / 512; 3288 3289 tf->auxiliary = 1; 3290 } else { 3291 tf->protocol = ATA_PROT_DMA; 3292 tf->hob_feature = 0; 3293 tf->feature = ATA_DSM_TRIM; 3294 tf->hob_nsect = (size / 512) >> 8; 3295 tf->nsect = size / 512; 3296 tf->command = ATA_CMD_DSM; 3297 } 3298 3299 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3300 ATA_TFLAG_WRITE; 3301 3302 ata_qc_set_pc_nbytes(qc); 3303 3304 return 0; 3305 3306 invalid_fld: 3307 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3308 return 1; 3309 invalid_param_len: 3310 /* "Parameter list length error" */ 3311 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3312 return 1; 3313 invalid_opcode: 3314 /* "Invalid command operation code" */ 3315 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3316 return 1; 3317 } 3318 3319 /** 3320 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3321 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3322 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3323 * 3324 * Yields a subset to satisfy scsi_report_opcode() 3325 * 3326 * LOCKING: 3327 * spin_lock_irqsave(host lock) 3328 */ 3329 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3330 { 3331 struct ata_device *dev = args->dev; 3332 u8 *cdb = args->cmd->cmnd; 3333 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3334 unsigned int err = 0; 3335 3336 if (cdb[2] != 1 && cdb[2] != 3) { 3337 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3338 err = 2; 3339 goto out; 3340 } 3341 3342 switch (cdb[3]) { 3343 case INQUIRY: 3344 case MODE_SENSE: 3345 case MODE_SENSE_10: 3346 case READ_CAPACITY: 3347 case SERVICE_ACTION_IN_16: 3348 case REPORT_LUNS: 3349 case REQUEST_SENSE: 3350 case SYNCHRONIZE_CACHE: 3351 case SYNCHRONIZE_CACHE_16: 3352 case REZERO_UNIT: 3353 case SEEK_6: 3354 case SEEK_10: 3355 case TEST_UNIT_READY: 3356 case SEND_DIAGNOSTIC: 3357 case MAINTENANCE_IN: 3358 case READ_6: 3359 case READ_10: 3360 case WRITE_6: 3361 case WRITE_10: 3362 case ATA_12: 3363 case ATA_16: 3364 case VERIFY: 3365 case VERIFY_16: 3366 case MODE_SELECT: 3367 case MODE_SELECT_10: 3368 case START_STOP: 3369 supported = 3; 3370 break; 3371 case READ_16: 3372 supported = 3; 3373 if (dev->flags & ATA_DFLAG_CDL) { 3374 /* 3375 * CDL read descriptors map to the T2A page, that is, 3376 * rwcdlp = 0x01 and cdlp = 0x01 3377 */ 3378 rwcdlp = 0x01; 3379 cdlp = 0x01 << 3; 3380 } 3381 break; 3382 case WRITE_16: 3383 supported = 3; 3384 if (dev->flags & ATA_DFLAG_CDL) { 3385 /* 3386 * CDL write descriptors map to the T2B page, that is, 3387 * rwcdlp = 0x01 and cdlp = 0x02 3388 */ 3389 rwcdlp = 0x01; 3390 cdlp = 0x02 << 3; 3391 } 3392 break; 3393 case ZBC_IN: 3394 case ZBC_OUT: 3395 if (ata_id_zoned_cap(dev->id) || 3396 dev->class == ATA_DEV_ZAC) 3397 supported = 3; 3398 break; 3399 case SECURITY_PROTOCOL_IN: 3400 case SECURITY_PROTOCOL_OUT: 3401 if (dev->flags & ATA_DFLAG_TRUSTED) 3402 supported = 3; 3403 break; 3404 default: 3405 break; 3406 } 3407 out: 3408 /* One command format */ 3409 rbuf[0] = rwcdlp; 3410 rbuf[1] = cdlp | supported; 3411 return err; 3412 } 3413 3414 /** 3415 * ata_scsi_report_zones_complete - convert ATA output 3416 * @qc: command structure returning the data 3417 * 3418 * Convert T-13 little-endian field representation into 3419 * T-10 big-endian field representation. 3420 * What a mess. 3421 */ 3422 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3423 { 3424 struct scsi_cmnd *scmd = qc->scsicmd; 3425 struct sg_mapping_iter miter; 3426 unsigned long flags; 3427 unsigned int bytes = 0; 3428 3429 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3430 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3431 3432 local_irq_save(flags); 3433 while (sg_miter_next(&miter)) { 3434 unsigned int offset = 0; 3435 3436 if (bytes == 0) { 3437 char *hdr; 3438 u32 list_length; 3439 u64 max_lba, opt_lba; 3440 u16 same; 3441 3442 /* Swizzle header */ 3443 hdr = miter.addr; 3444 list_length = get_unaligned_le32(&hdr[0]); 3445 same = get_unaligned_le16(&hdr[4]); 3446 max_lba = get_unaligned_le64(&hdr[8]); 3447 opt_lba = get_unaligned_le64(&hdr[16]); 3448 put_unaligned_be32(list_length, &hdr[0]); 3449 hdr[4] = same & 0xf; 3450 put_unaligned_be64(max_lba, &hdr[8]); 3451 put_unaligned_be64(opt_lba, &hdr[16]); 3452 offset += 64; 3453 bytes += 64; 3454 } 3455 while (offset < miter.length) { 3456 char *rec; 3457 u8 cond, type, non_seq, reset; 3458 u64 size, start, wp; 3459 3460 /* Swizzle zone descriptor */ 3461 rec = miter.addr + offset; 3462 type = rec[0] & 0xf; 3463 cond = (rec[1] >> 4) & 0xf; 3464 non_seq = (rec[1] & 2); 3465 reset = (rec[1] & 1); 3466 size = get_unaligned_le64(&rec[8]); 3467 start = get_unaligned_le64(&rec[16]); 3468 wp = get_unaligned_le64(&rec[24]); 3469 rec[0] = type; 3470 rec[1] = (cond << 4) | non_seq | reset; 3471 put_unaligned_be64(size, &rec[8]); 3472 put_unaligned_be64(start, &rec[16]); 3473 put_unaligned_be64(wp, &rec[24]); 3474 WARN_ON(offset + 64 > miter.length); 3475 offset += 64; 3476 bytes += 64; 3477 } 3478 } 3479 sg_miter_stop(&miter); 3480 local_irq_restore(flags); 3481 3482 ata_scsi_qc_complete(qc); 3483 } 3484 3485 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3486 { 3487 struct ata_taskfile *tf = &qc->tf; 3488 struct scsi_cmnd *scmd = qc->scsicmd; 3489 const u8 *cdb = scmd->cmnd; 3490 u16 sect, fp = (u16)-1; 3491 u8 sa, options, bp = 0xff; 3492 u64 block; 3493 u32 n_block; 3494 3495 if (unlikely(scmd->cmd_len < 16)) { 3496 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3497 scmd->cmd_len); 3498 fp = 15; 3499 goto invalid_fld; 3500 } 3501 scsi_16_lba_len(cdb, &block, &n_block); 3502 if (n_block != scsi_bufflen(scmd)) { 3503 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3504 n_block, scsi_bufflen(scmd)); 3505 goto invalid_param_len; 3506 } 3507 sa = cdb[1] & 0x1f; 3508 if (sa != ZI_REPORT_ZONES) { 3509 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3510 fp = 1; 3511 goto invalid_fld; 3512 } 3513 /* 3514 * ZAC allows only for transfers in 512 byte blocks, 3515 * and uses a 16 bit value for the transfer count. 3516 */ 3517 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3518 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3519 goto invalid_param_len; 3520 } 3521 sect = n_block / 512; 3522 options = cdb[14] & 0xbf; 3523 3524 if (ata_ncq_enabled(qc->dev) && 3525 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3526 tf->protocol = ATA_PROT_NCQ; 3527 tf->command = ATA_CMD_FPDMA_RECV; 3528 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3529 tf->nsect = qc->hw_tag << 3; 3530 tf->feature = sect & 0xff; 3531 tf->hob_feature = (sect >> 8) & 0xff; 3532 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3533 } else { 3534 tf->command = ATA_CMD_ZAC_MGMT_IN; 3535 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3536 tf->protocol = ATA_PROT_DMA; 3537 tf->hob_feature = options; 3538 tf->hob_nsect = (sect >> 8) & 0xff; 3539 tf->nsect = sect & 0xff; 3540 } 3541 tf->device = ATA_LBA; 3542 tf->lbah = (block >> 16) & 0xff; 3543 tf->lbam = (block >> 8) & 0xff; 3544 tf->lbal = block & 0xff; 3545 tf->hob_lbah = (block >> 40) & 0xff; 3546 tf->hob_lbam = (block >> 32) & 0xff; 3547 tf->hob_lbal = (block >> 24) & 0xff; 3548 3549 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3550 qc->flags |= ATA_QCFLAG_RESULT_TF; 3551 3552 ata_qc_set_pc_nbytes(qc); 3553 3554 qc->complete_fn = ata_scsi_report_zones_complete; 3555 3556 return 0; 3557 3558 invalid_fld: 3559 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3560 return 1; 3561 3562 invalid_param_len: 3563 /* "Parameter list length error" */ 3564 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3565 return 1; 3566 } 3567 3568 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3569 { 3570 struct ata_taskfile *tf = &qc->tf; 3571 struct scsi_cmnd *scmd = qc->scsicmd; 3572 struct ata_device *dev = qc->dev; 3573 const u8 *cdb = scmd->cmnd; 3574 u8 all, sa; 3575 u64 block; 3576 u32 n_block; 3577 u16 fp = (u16)-1; 3578 3579 if (unlikely(scmd->cmd_len < 16)) { 3580 fp = 15; 3581 goto invalid_fld; 3582 } 3583 3584 sa = cdb[1] & 0x1f; 3585 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3586 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3587 fp = 1; 3588 goto invalid_fld; 3589 } 3590 3591 scsi_16_lba_len(cdb, &block, &n_block); 3592 if (n_block) { 3593 /* 3594 * ZAC MANAGEMENT OUT doesn't define any length 3595 */ 3596 goto invalid_param_len; 3597 } 3598 3599 all = cdb[14] & 0x1; 3600 if (all) { 3601 /* 3602 * Ignore the block address (zone ID) as defined by ZBC. 3603 */ 3604 block = 0; 3605 } else if (block >= dev->n_sectors) { 3606 /* 3607 * Block must be a valid zone ID (a zone start LBA). 3608 */ 3609 fp = 2; 3610 goto invalid_fld; 3611 } 3612 3613 if (ata_ncq_enabled(qc->dev) && 3614 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3615 tf->protocol = ATA_PROT_NCQ_NODATA; 3616 tf->command = ATA_CMD_NCQ_NON_DATA; 3617 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3618 tf->nsect = qc->hw_tag << 3; 3619 tf->auxiliary = sa | ((u16)all << 8); 3620 } else { 3621 tf->protocol = ATA_PROT_NODATA; 3622 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3623 tf->feature = sa; 3624 tf->hob_feature = all; 3625 } 3626 tf->lbah = (block >> 16) & 0xff; 3627 tf->lbam = (block >> 8) & 0xff; 3628 tf->lbal = block & 0xff; 3629 tf->hob_lbah = (block >> 40) & 0xff; 3630 tf->hob_lbam = (block >> 32) & 0xff; 3631 tf->hob_lbal = (block >> 24) & 0xff; 3632 tf->device = ATA_LBA; 3633 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3634 3635 return 0; 3636 3637 invalid_fld: 3638 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3639 return 1; 3640 invalid_param_len: 3641 /* "Parameter list length error" */ 3642 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3643 return 1; 3644 } 3645 3646 /** 3647 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3648 * @qc: Storage for translated ATA taskfile 3649 * @buf: input buffer 3650 * @len: number of valid bytes in the input buffer 3651 * @fp: out parameter for the failed field on error 3652 * 3653 * Prepare a taskfile to modify caching information for the device. 3654 * 3655 * LOCKING: 3656 * None. 3657 */ 3658 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3659 const u8 *buf, int len, u16 *fp) 3660 { 3661 struct ata_taskfile *tf = &qc->tf; 3662 struct ata_device *dev = qc->dev; 3663 u8 mpage[CACHE_MPAGE_LEN]; 3664 u8 wce; 3665 int i; 3666 3667 /* 3668 * The first two bytes of def_cache_mpage are a header, so offsets 3669 * in mpage are off by 2 compared to buf. Same for len. 3670 */ 3671 3672 if (len != CACHE_MPAGE_LEN - 2) { 3673 *fp = min(len, CACHE_MPAGE_LEN - 2); 3674 return -EINVAL; 3675 } 3676 3677 wce = buf[0] & (1 << 2); 3678 3679 /* 3680 * Check that read-only bits are not modified. 3681 */ 3682 ata_msense_caching(dev->id, mpage, false); 3683 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3684 if (i == 0) 3685 continue; 3686 if (mpage[i + 2] != buf[i]) { 3687 *fp = i; 3688 return -EINVAL; 3689 } 3690 } 3691 3692 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3693 tf->protocol = ATA_PROT_NODATA; 3694 tf->nsect = 0; 3695 tf->command = ATA_CMD_SET_FEATURES; 3696 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3697 return 0; 3698 } 3699 3700 /* 3701 * Simulate MODE SELECT control mode page, sub-page 0. 3702 */ 3703 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3704 const u8 *buf, int len, u16 *fp) 3705 { 3706 struct ata_device *dev = qc->dev; 3707 u8 mpage[CONTROL_MPAGE_LEN]; 3708 u8 d_sense; 3709 int i; 3710 3711 /* 3712 * The first two bytes of def_control_mpage are a header, so offsets 3713 * in mpage are off by 2 compared to buf. Same for len. 3714 */ 3715 3716 if (len != CONTROL_MPAGE_LEN - 2) { 3717 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3718 return -EINVAL; 3719 } 3720 3721 d_sense = buf[0] & (1 << 2); 3722 3723 /* 3724 * Check that read-only bits are not modified. 3725 */ 3726 ata_msense_control_spg0(dev, mpage, false); 3727 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3728 if (i == 0) 3729 continue; 3730 if (mpage[2 + i] != buf[i]) { 3731 *fp = i; 3732 return -EINVAL; 3733 } 3734 } 3735 if (d_sense & (1 << 2)) 3736 dev->flags |= ATA_DFLAG_D_SENSE; 3737 else 3738 dev->flags &= ~ATA_DFLAG_D_SENSE; 3739 return 0; 3740 } 3741 3742 /* 3743 * Translate MODE SELECT control mode page, sub-pages f2h (ATA feature mode 3744 * page) into a SET FEATURES command. 3745 */ 3746 static unsigned int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 3747 const u8 *buf, int len, 3748 u16 *fp) 3749 { 3750 struct ata_device *dev = qc->dev; 3751 struct ata_taskfile *tf = &qc->tf; 3752 u8 cdl_action; 3753 3754 /* 3755 * The first four bytes of ATA Feature Control mode page are a header, 3756 * so offsets in mpage are off by 4 compared to buf. Same for len. 3757 */ 3758 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 3759 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 3760 return -EINVAL; 3761 } 3762 3763 /* Check cdl_ctrl */ 3764 switch (buf[0] & 0x03) { 3765 case 0: 3766 /* Disable CDL */ 3767 cdl_action = 0; 3768 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 3769 break; 3770 case 0x02: 3771 /* Enable CDL T2A/T2B: NCQ priority must be disabled */ 3772 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 3773 ata_dev_err(dev, 3774 "NCQ priority must be disabled to enable CDL\n"); 3775 return -EINVAL; 3776 } 3777 cdl_action = 1; 3778 dev->flags |= ATA_DFLAG_CDL_ENABLED; 3779 break; 3780 default: 3781 *fp = 0; 3782 return -EINVAL; 3783 } 3784 3785 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3786 tf->protocol = ATA_PROT_NODATA; 3787 tf->command = ATA_CMD_SET_FEATURES; 3788 tf->feature = SETFEATURES_CDL; 3789 tf->nsect = cdl_action; 3790 3791 return 1; 3792 } 3793 3794 /** 3795 * ata_mselect_control - Simulate MODE SELECT for control page 3796 * @qc: Storage for translated ATA taskfile 3797 * @spg: target sub-page of the control page 3798 * @buf: input buffer 3799 * @len: number of valid bytes in the input buffer 3800 * @fp: out parameter for the failed field on error 3801 * 3802 * Prepare a taskfile to modify caching information for the device. 3803 * 3804 * LOCKING: 3805 * None. 3806 */ 3807 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 3808 const u8 *buf, int len, u16 *fp) 3809 { 3810 switch (spg) { 3811 case 0: 3812 return ata_mselect_control_spg0(qc, buf, len, fp); 3813 case ATA_FEATURE_SUB_MPAGE: 3814 return ata_mselect_control_ata_feature(qc, buf, len, fp); 3815 default: 3816 return -EINVAL; 3817 } 3818 } 3819 3820 /** 3821 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3822 * @qc: Storage for translated ATA taskfile 3823 * 3824 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3825 * Assume this is invoked for direct access devices (e.g. disks) only. 3826 * There should be no block descriptor for other device types. 3827 * 3828 * LOCKING: 3829 * spin_lock_irqsave(host lock) 3830 */ 3831 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3832 { 3833 struct scsi_cmnd *scmd = qc->scsicmd; 3834 const u8 *cdb = scmd->cmnd; 3835 u8 pg, spg; 3836 unsigned six_byte, pg_len, hdr_len, bd_len; 3837 int len, ret; 3838 u16 fp = (u16)-1; 3839 u8 bp = 0xff; 3840 u8 buffer[64]; 3841 const u8 *p = buffer; 3842 3843 six_byte = (cdb[0] == MODE_SELECT); 3844 if (six_byte) { 3845 if (scmd->cmd_len < 5) { 3846 fp = 4; 3847 goto invalid_fld; 3848 } 3849 3850 len = cdb[4]; 3851 hdr_len = 4; 3852 } else { 3853 if (scmd->cmd_len < 9) { 3854 fp = 8; 3855 goto invalid_fld; 3856 } 3857 3858 len = get_unaligned_be16(&cdb[7]); 3859 hdr_len = 8; 3860 } 3861 3862 /* We only support PF=1, SP=0. */ 3863 if ((cdb[1] & 0x11) != 0x10) { 3864 fp = 1; 3865 bp = (cdb[1] & 0x01) ? 1 : 5; 3866 goto invalid_fld; 3867 } 3868 3869 /* Test early for possible overrun. */ 3870 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3871 goto invalid_param_len; 3872 3873 /* Move past header and block descriptors. */ 3874 if (len < hdr_len) 3875 goto invalid_param_len; 3876 3877 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3878 buffer, sizeof(buffer))) 3879 goto invalid_param_len; 3880 3881 if (six_byte) 3882 bd_len = p[3]; 3883 else 3884 bd_len = get_unaligned_be16(&p[6]); 3885 3886 len -= hdr_len; 3887 p += hdr_len; 3888 if (len < bd_len) 3889 goto invalid_param_len; 3890 if (bd_len != 0 && bd_len != 8) { 3891 fp = (six_byte) ? 3 : 6; 3892 fp += bd_len + hdr_len; 3893 goto invalid_param; 3894 } 3895 3896 len -= bd_len; 3897 p += bd_len; 3898 if (len == 0) 3899 goto skip; 3900 3901 /* Parse both possible formats for the mode page headers. */ 3902 pg = p[0] & 0x3f; 3903 if (p[0] & 0x40) { 3904 if (len < 4) 3905 goto invalid_param_len; 3906 3907 spg = p[1]; 3908 pg_len = get_unaligned_be16(&p[2]); 3909 p += 4; 3910 len -= 4; 3911 } else { 3912 if (len < 2) 3913 goto invalid_param_len; 3914 3915 spg = 0; 3916 pg_len = p[1]; 3917 p += 2; 3918 len -= 2; 3919 } 3920 3921 /* 3922 * Supported subpages: all subpages and ATA feature sub-page f2h of 3923 * the control page. 3924 */ 3925 if (spg) { 3926 switch (spg) { 3927 case ALL_SUB_MPAGES: 3928 /* All subpages is not supported for the control page */ 3929 if (pg == CONTROL_MPAGE) { 3930 fp = (p[0] & 0x40) ? 1 : 0; 3931 fp += hdr_len + bd_len; 3932 goto invalid_param; 3933 } 3934 break; 3935 case ATA_FEATURE_SUB_MPAGE: 3936 if (qc->dev->flags & ATA_DFLAG_CDL && 3937 pg == CONTROL_MPAGE) 3938 break; 3939 fallthrough; 3940 default: 3941 fp = (p[0] & 0x40) ? 1 : 0; 3942 fp += hdr_len + bd_len; 3943 goto invalid_param; 3944 } 3945 } 3946 if (pg_len > len) 3947 goto invalid_param_len; 3948 3949 switch (pg) { 3950 case CACHE_MPAGE: 3951 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3952 fp += hdr_len + bd_len; 3953 goto invalid_param; 3954 } 3955 break; 3956 case CONTROL_MPAGE: 3957 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 3958 if (ret < 0) { 3959 fp += hdr_len + bd_len; 3960 goto invalid_param; 3961 } 3962 if (!ret) 3963 goto skip; /* No ATA command to send */ 3964 break; 3965 default: 3966 /* Invalid page code */ 3967 fp = bd_len + hdr_len; 3968 goto invalid_param; 3969 } 3970 3971 /* 3972 * Only one page has changeable data, so we only support setting one 3973 * page at a time. 3974 */ 3975 if (len > pg_len) 3976 goto invalid_param; 3977 3978 return 0; 3979 3980 invalid_fld: 3981 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3982 return 1; 3983 3984 invalid_param: 3985 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3986 return 1; 3987 3988 invalid_param_len: 3989 /* "Parameter list length error" */ 3990 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3991 return 1; 3992 3993 skip: 3994 scmd->result = SAM_STAT_GOOD; 3995 return 1; 3996 } 3997 3998 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3999 { 4000 if (len == 0) 4001 return ATA_CMD_TRUSTED_NONDATA; 4002 else if (send) 4003 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4004 else 4005 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4006 } 4007 4008 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4009 { 4010 struct scsi_cmnd *scmd = qc->scsicmd; 4011 const u8 *cdb = scmd->cmnd; 4012 struct ata_taskfile *tf = &qc->tf; 4013 u8 secp = cdb[1]; 4014 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4015 u16 spsp = get_unaligned_be16(&cdb[2]); 4016 u32 len = get_unaligned_be32(&cdb[6]); 4017 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4018 4019 /* 4020 * We don't support the ATA "security" protocol. 4021 */ 4022 if (secp == 0xef) { 4023 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4024 return 1; 4025 } 4026 4027 if (cdb[4] & 7) { /* INC_512 */ 4028 if (len > 0xffff) { 4029 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4030 return 1; 4031 } 4032 } else { 4033 if (len > 0x01fffe00) { 4034 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4035 return 1; 4036 } 4037 4038 /* convert to the sector-based ATA addressing */ 4039 len = (len + 511) / 512; 4040 } 4041 4042 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4043 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4044 if (send) 4045 tf->flags |= ATA_TFLAG_WRITE; 4046 tf->command = ata_scsi_trusted_op(len, send, dma); 4047 tf->feature = secp; 4048 tf->lbam = spsp & 0xff; 4049 tf->lbah = spsp >> 8; 4050 4051 if (len) { 4052 tf->nsect = len & 0xff; 4053 tf->lbal = len >> 8; 4054 } else { 4055 if (!send) 4056 tf->lbah = (1 << 7); 4057 } 4058 4059 ata_qc_set_pc_nbytes(qc); 4060 return 0; 4061 } 4062 4063 /** 4064 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4065 * @qc: Command to be translated 4066 * 4067 * Translate a SCSI variable length CDB to specified commands. 4068 * It checks a service action value in CDB to call corresponding handler. 4069 * 4070 * RETURNS: 4071 * Zero on success, non-zero on failure 4072 * 4073 */ 4074 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4075 { 4076 struct scsi_cmnd *scmd = qc->scsicmd; 4077 const u8 *cdb = scmd->cmnd; 4078 const u16 sa = get_unaligned_be16(&cdb[8]); 4079 4080 /* 4081 * if service action represents a ata pass-thru(32) command, 4082 * then pass it to ata_scsi_pass_thru handler. 4083 */ 4084 if (sa == ATA_32) 4085 return ata_scsi_pass_thru(qc); 4086 4087 /* unsupported service action */ 4088 return 1; 4089 } 4090 4091 /** 4092 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4093 * @dev: ATA device 4094 * @cmd: SCSI command opcode to consider 4095 * 4096 * Look up the SCSI command given, and determine whether the 4097 * SCSI command is to be translated or simulated. 4098 * 4099 * RETURNS: 4100 * Pointer to translation function if possible, %NULL if not. 4101 */ 4102 4103 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4104 { 4105 switch (cmd) { 4106 case READ_6: 4107 case READ_10: 4108 case READ_16: 4109 4110 case WRITE_6: 4111 case WRITE_10: 4112 case WRITE_16: 4113 return ata_scsi_rw_xlat; 4114 4115 case WRITE_SAME_16: 4116 return ata_scsi_write_same_xlat; 4117 4118 case SYNCHRONIZE_CACHE: 4119 case SYNCHRONIZE_CACHE_16: 4120 if (ata_try_flush_cache(dev)) 4121 return ata_scsi_flush_xlat; 4122 break; 4123 4124 case VERIFY: 4125 case VERIFY_16: 4126 return ata_scsi_verify_xlat; 4127 4128 case ATA_12: 4129 case ATA_16: 4130 return ata_scsi_pass_thru; 4131 4132 case VARIABLE_LENGTH_CMD: 4133 return ata_scsi_var_len_cdb_xlat; 4134 4135 case MODE_SELECT: 4136 case MODE_SELECT_10: 4137 return ata_scsi_mode_select_xlat; 4138 4139 case ZBC_IN: 4140 return ata_scsi_zbc_in_xlat; 4141 4142 case ZBC_OUT: 4143 return ata_scsi_zbc_out_xlat; 4144 4145 case SECURITY_PROTOCOL_IN: 4146 case SECURITY_PROTOCOL_OUT: 4147 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4148 break; 4149 return ata_scsi_security_inout_xlat; 4150 4151 case START_STOP: 4152 return ata_scsi_start_stop_xlat; 4153 } 4154 4155 return NULL; 4156 } 4157 4158 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4159 { 4160 struct ata_port *ap = dev->link->ap; 4161 u8 scsi_op = scmd->cmnd[0]; 4162 ata_xlat_func_t xlat_func; 4163 4164 /* 4165 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4166 * However, this check is done without holding the ap->lock (a libata 4167 * specific lock), so we can have received an error irq since then, 4168 * therefore we must check if EH is pending, while holding ap->lock. 4169 */ 4170 if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) 4171 return SCSI_MLQUEUE_DEVICE_BUSY; 4172 4173 if (unlikely(!scmd->cmd_len)) 4174 goto bad_cdb_len; 4175 4176 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4177 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4178 goto bad_cdb_len; 4179 4180 xlat_func = ata_get_xlat_func(dev, scsi_op); 4181 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4182 /* relay SCSI command to ATAPI device */ 4183 int len = COMMAND_SIZE(scsi_op); 4184 4185 if (unlikely(len > scmd->cmd_len || 4186 len > dev->cdb_len || 4187 scmd->cmd_len > ATAPI_CDB_LEN)) 4188 goto bad_cdb_len; 4189 4190 xlat_func = atapi_xlat; 4191 } else { 4192 /* ATA_16 passthru, treat as an ATA command */ 4193 if (unlikely(scmd->cmd_len > 16)) 4194 goto bad_cdb_len; 4195 4196 xlat_func = ata_get_xlat_func(dev, scsi_op); 4197 } 4198 4199 if (xlat_func) 4200 return ata_scsi_translate(dev, scmd, xlat_func); 4201 4202 ata_scsi_simulate(dev, scmd); 4203 4204 return 0; 4205 4206 bad_cdb_len: 4207 scmd->result = DID_ERROR << 16; 4208 scsi_done(scmd); 4209 return 0; 4210 } 4211 4212 /** 4213 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4214 * @shost: SCSI host of command to be sent 4215 * @cmd: SCSI command to be sent 4216 * 4217 * In some cases, this function translates SCSI commands into 4218 * ATA taskfiles, and queues the taskfiles to be sent to 4219 * hardware. In other cases, this function simulates a 4220 * SCSI device by evaluating and responding to certain 4221 * SCSI commands. This creates the overall effect of 4222 * ATA and ATAPI devices appearing as SCSI devices. 4223 * 4224 * LOCKING: 4225 * ATA host lock 4226 * 4227 * RETURNS: 4228 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4229 * 0 otherwise. 4230 */ 4231 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4232 { 4233 struct ata_port *ap; 4234 struct ata_device *dev; 4235 struct scsi_device *scsidev = cmd->device; 4236 int rc = 0; 4237 unsigned long irq_flags; 4238 4239 ap = ata_shost_to_port(shost); 4240 4241 spin_lock_irqsave(ap->lock, irq_flags); 4242 4243 dev = ata_scsi_find_dev(ap, scsidev); 4244 if (likely(dev)) 4245 rc = __ata_scsi_queuecmd(cmd, dev); 4246 else { 4247 cmd->result = (DID_BAD_TARGET << 16); 4248 scsi_done(cmd); 4249 } 4250 4251 spin_unlock_irqrestore(ap->lock, irq_flags); 4252 4253 return rc; 4254 } 4255 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4256 4257 /** 4258 * ata_scsi_simulate - simulate SCSI command on ATA device 4259 * @dev: the target device 4260 * @cmd: SCSI command being sent to device. 4261 * 4262 * Interprets and directly executes a select list of SCSI commands 4263 * that can be handled internally. 4264 * 4265 * LOCKING: 4266 * spin_lock_irqsave(host lock) 4267 */ 4268 4269 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4270 { 4271 struct ata_scsi_args args; 4272 const u8 *scsicmd = cmd->cmnd; 4273 u8 tmp8; 4274 4275 args.dev = dev; 4276 args.id = dev->id; 4277 args.cmd = cmd; 4278 4279 switch(scsicmd[0]) { 4280 case INQUIRY: 4281 if (scsicmd[1] & 2) /* is CmdDt set? */ 4282 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4283 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4284 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4285 else switch (scsicmd[2]) { 4286 case 0x00: 4287 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4288 break; 4289 case 0x80: 4290 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4291 break; 4292 case 0x83: 4293 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4294 break; 4295 case 0x89: 4296 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4297 break; 4298 case 0xb0: 4299 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4300 break; 4301 case 0xb1: 4302 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4303 break; 4304 case 0xb2: 4305 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4306 break; 4307 case 0xb6: 4308 if (dev->flags & ATA_DFLAG_ZAC) 4309 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4310 else 4311 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4312 break; 4313 case 0xb9: 4314 if (dev->cpr_log) 4315 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4316 else 4317 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4318 break; 4319 default: 4320 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4321 break; 4322 } 4323 break; 4324 4325 case MODE_SENSE: 4326 case MODE_SENSE_10: 4327 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4328 break; 4329 4330 case READ_CAPACITY: 4331 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4332 break; 4333 4334 case SERVICE_ACTION_IN_16: 4335 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4336 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4337 else 4338 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4339 break; 4340 4341 case REPORT_LUNS: 4342 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4343 break; 4344 4345 case REQUEST_SENSE: 4346 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4347 break; 4348 4349 /* if we reach this, then writeback caching is disabled, 4350 * turning this into a no-op. 4351 */ 4352 case SYNCHRONIZE_CACHE: 4353 case SYNCHRONIZE_CACHE_16: 4354 fallthrough; 4355 4356 /* no-op's, complete with success */ 4357 case REZERO_UNIT: 4358 case SEEK_6: 4359 case SEEK_10: 4360 case TEST_UNIT_READY: 4361 break; 4362 4363 case SEND_DIAGNOSTIC: 4364 tmp8 = scsicmd[1] & ~(1 << 3); 4365 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4366 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4367 break; 4368 4369 case MAINTENANCE_IN: 4370 if ((scsicmd[1] & 0x1f) == MI_REPORT_SUPPORTED_OPERATION_CODES) 4371 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4372 else 4373 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4374 break; 4375 4376 /* all other commands */ 4377 default: 4378 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4379 /* "Invalid command operation code" */ 4380 break; 4381 } 4382 4383 scsi_done(cmd); 4384 } 4385 4386 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4387 { 4388 int i, rc; 4389 4390 for (i = 0; i < host->n_ports; i++) { 4391 struct ata_port *ap = host->ports[i]; 4392 struct Scsi_Host *shost; 4393 4394 rc = -ENOMEM; 4395 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4396 if (!shost) 4397 goto err_alloc; 4398 4399 shost->eh_noresume = 1; 4400 *(struct ata_port **)&shost->hostdata[0] = ap; 4401 ap->scsi_host = shost; 4402 4403 shost->transportt = ata_scsi_transport_template; 4404 shost->unique_id = ap->print_id; 4405 shost->max_id = 16; 4406 shost->max_lun = 1; 4407 shost->max_channel = 1; 4408 shost->max_cmd_len = 32; 4409 4410 /* Schedule policy is determined by ->qc_defer() 4411 * callback and it needs to see every deferred qc. 4412 * Set host_blocked to 1 to prevent SCSI midlayer from 4413 * automatically deferring requests. 4414 */ 4415 shost->max_host_blocked = 1; 4416 4417 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4418 if (rc) 4419 goto err_alloc; 4420 } 4421 4422 return 0; 4423 4424 err_alloc: 4425 while (--i >= 0) { 4426 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4427 4428 /* scsi_host_put() is in ata_devres_release() */ 4429 scsi_remove_host(shost); 4430 } 4431 return rc; 4432 } 4433 4434 #ifdef CONFIG_OF 4435 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4436 { 4437 struct scsi_device *sdev = dev->sdev; 4438 struct device *d = ap->host->dev; 4439 struct device_node *np = d->of_node; 4440 struct device_node *child; 4441 4442 for_each_available_child_of_node(np, child) { 4443 int ret; 4444 u32 val; 4445 4446 ret = of_property_read_u32(child, "reg", &val); 4447 if (ret) 4448 continue; 4449 if (val == dev->devno) { 4450 dev_dbg(d, "found matching device node\n"); 4451 sdev->sdev_gendev.of_node = child; 4452 return; 4453 } 4454 } 4455 } 4456 #else 4457 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4458 { 4459 } 4460 #endif 4461 4462 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4463 { 4464 int tries = 5; 4465 struct ata_device *last_failed_dev = NULL; 4466 struct ata_link *link; 4467 struct ata_device *dev; 4468 4469 repeat: 4470 ata_for_each_link(link, ap, EDGE) { 4471 ata_for_each_dev(dev, link, ENABLED) { 4472 struct scsi_device *sdev; 4473 int channel = 0, id = 0; 4474 4475 if (dev->sdev) 4476 continue; 4477 4478 if (ata_is_host_link(link)) 4479 id = dev->devno; 4480 else 4481 channel = link->pmp; 4482 4483 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4484 NULL); 4485 if (!IS_ERR(sdev)) { 4486 dev->sdev = sdev; 4487 ata_scsi_assign_ofnode(dev, ap); 4488 scsi_device_put(sdev); 4489 } else { 4490 dev->sdev = NULL; 4491 } 4492 } 4493 } 4494 4495 /* If we scanned while EH was in progress or allocation 4496 * failure occurred, scan would have failed silently. Check 4497 * whether all devices are attached. 4498 */ 4499 ata_for_each_link(link, ap, EDGE) { 4500 ata_for_each_dev(dev, link, ENABLED) { 4501 if (!dev->sdev) 4502 goto exit_loop; 4503 } 4504 } 4505 exit_loop: 4506 if (!link) 4507 return; 4508 4509 /* we're missing some SCSI devices */ 4510 if (sync) { 4511 /* If caller requested synchrnous scan && we've made 4512 * any progress, sleep briefly and repeat. 4513 */ 4514 if (dev != last_failed_dev) { 4515 msleep(100); 4516 last_failed_dev = dev; 4517 goto repeat; 4518 } 4519 4520 /* We might be failing to detect boot device, give it 4521 * a few more chances. 4522 */ 4523 if (--tries) { 4524 msleep(100); 4525 goto repeat; 4526 } 4527 4528 ata_port_err(ap, 4529 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4530 } 4531 4532 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4533 round_jiffies_relative(HZ)); 4534 } 4535 4536 /** 4537 * ata_scsi_offline_dev - offline attached SCSI device 4538 * @dev: ATA device to offline attached SCSI device for 4539 * 4540 * This function is called from ata_eh_hotplug() and responsible 4541 * for taking the SCSI device attached to @dev offline. This 4542 * function is called with host lock which protects dev->sdev 4543 * against clearing. 4544 * 4545 * LOCKING: 4546 * spin_lock_irqsave(host lock) 4547 * 4548 * RETURNS: 4549 * 1 if attached SCSI device exists, 0 otherwise. 4550 */ 4551 int ata_scsi_offline_dev(struct ata_device *dev) 4552 { 4553 if (dev->sdev) { 4554 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4555 return 1; 4556 } 4557 return 0; 4558 } 4559 4560 /** 4561 * ata_scsi_remove_dev - remove attached SCSI device 4562 * @dev: ATA device to remove attached SCSI device for 4563 * 4564 * This function is called from ata_eh_scsi_hotplug() and 4565 * responsible for removing the SCSI device attached to @dev. 4566 * 4567 * LOCKING: 4568 * Kernel thread context (may sleep). 4569 */ 4570 static void ata_scsi_remove_dev(struct ata_device *dev) 4571 { 4572 struct ata_port *ap = dev->link->ap; 4573 struct scsi_device *sdev; 4574 unsigned long flags; 4575 4576 /* Alas, we need to grab scan_mutex to ensure SCSI device 4577 * state doesn't change underneath us and thus 4578 * scsi_device_get() always succeeds. The mutex locking can 4579 * be removed if there is __scsi_device_get() interface which 4580 * increments reference counts regardless of device state. 4581 */ 4582 mutex_lock(&ap->scsi_host->scan_mutex); 4583 spin_lock_irqsave(ap->lock, flags); 4584 4585 /* clearing dev->sdev is protected by host lock */ 4586 sdev = dev->sdev; 4587 dev->sdev = NULL; 4588 4589 if (sdev) { 4590 /* If user initiated unplug races with us, sdev can go 4591 * away underneath us after the host lock and 4592 * scan_mutex are released. Hold onto it. 4593 */ 4594 if (scsi_device_get(sdev) == 0) { 4595 /* The following ensures the attached sdev is 4596 * offline on return from ata_scsi_offline_dev() 4597 * regardless it wins or loses the race 4598 * against this function. 4599 */ 4600 scsi_device_set_state(sdev, SDEV_OFFLINE); 4601 } else { 4602 WARN_ON(1); 4603 sdev = NULL; 4604 } 4605 } 4606 4607 spin_unlock_irqrestore(ap->lock, flags); 4608 mutex_unlock(&ap->scsi_host->scan_mutex); 4609 4610 if (sdev) { 4611 ata_dev_info(dev, "detaching (SCSI %s)\n", 4612 dev_name(&sdev->sdev_gendev)); 4613 4614 scsi_remove_device(sdev); 4615 scsi_device_put(sdev); 4616 } 4617 } 4618 4619 static void ata_scsi_handle_link_detach(struct ata_link *link) 4620 { 4621 struct ata_port *ap = link->ap; 4622 struct ata_device *dev; 4623 4624 ata_for_each_dev(dev, link, ALL) { 4625 unsigned long flags; 4626 4627 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4628 continue; 4629 4630 spin_lock_irqsave(ap->lock, flags); 4631 dev->flags &= ~ATA_DFLAG_DETACHED; 4632 spin_unlock_irqrestore(ap->lock, flags); 4633 4634 if (zpodd_dev_enabled(dev)) 4635 zpodd_exit(dev); 4636 4637 ata_scsi_remove_dev(dev); 4638 } 4639 } 4640 4641 /** 4642 * ata_scsi_media_change_notify - send media change event 4643 * @dev: Pointer to the disk device with media change event 4644 * 4645 * Tell the block layer to send a media change notification 4646 * event. 4647 * 4648 * LOCKING: 4649 * spin_lock_irqsave(host lock) 4650 */ 4651 void ata_scsi_media_change_notify(struct ata_device *dev) 4652 { 4653 if (dev->sdev) 4654 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4655 GFP_ATOMIC); 4656 } 4657 4658 /** 4659 * ata_scsi_hotplug - SCSI part of hotplug 4660 * @work: Pointer to ATA port to perform SCSI hotplug on 4661 * 4662 * Perform SCSI part of hotplug. It's executed from a separate 4663 * workqueue after EH completes. This is necessary because SCSI 4664 * hot plugging requires working EH and hot unplugging is 4665 * synchronized with hot plugging with a mutex. 4666 * 4667 * LOCKING: 4668 * Kernel thread context (may sleep). 4669 */ 4670 void ata_scsi_hotplug(struct work_struct *work) 4671 { 4672 struct ata_port *ap = 4673 container_of(work, struct ata_port, hotplug_task.work); 4674 int i; 4675 4676 if (ap->pflags & ATA_PFLAG_UNLOADING) 4677 return; 4678 4679 mutex_lock(&ap->scsi_scan_mutex); 4680 4681 /* Unplug detached devices. We cannot use link iterator here 4682 * because PMP links have to be scanned even if PMP is 4683 * currently not attached. Iterate manually. 4684 */ 4685 ata_scsi_handle_link_detach(&ap->link); 4686 if (ap->pmp_link) 4687 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4688 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4689 4690 /* scan for new ones */ 4691 ata_scsi_scan_host(ap, 0); 4692 4693 mutex_unlock(&ap->scsi_scan_mutex); 4694 } 4695 4696 /** 4697 * ata_scsi_user_scan - indication for user-initiated bus scan 4698 * @shost: SCSI host to scan 4699 * @channel: Channel to scan 4700 * @id: ID to scan 4701 * @lun: LUN to scan 4702 * 4703 * This function is called when user explicitly requests bus 4704 * scan. Set probe pending flag and invoke EH. 4705 * 4706 * LOCKING: 4707 * SCSI layer (we don't care) 4708 * 4709 * RETURNS: 4710 * Zero. 4711 */ 4712 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4713 unsigned int id, u64 lun) 4714 { 4715 struct ata_port *ap = ata_shost_to_port(shost); 4716 unsigned long flags; 4717 int devno, rc = 0; 4718 4719 if (lun != SCAN_WILD_CARD && lun) 4720 return -EINVAL; 4721 4722 if (!sata_pmp_attached(ap)) { 4723 if (channel != SCAN_WILD_CARD && channel) 4724 return -EINVAL; 4725 devno = id; 4726 } else { 4727 if (id != SCAN_WILD_CARD && id) 4728 return -EINVAL; 4729 devno = channel; 4730 } 4731 4732 spin_lock_irqsave(ap->lock, flags); 4733 4734 if (devno == SCAN_WILD_CARD) { 4735 struct ata_link *link; 4736 4737 ata_for_each_link(link, ap, EDGE) { 4738 struct ata_eh_info *ehi = &link->eh_info; 4739 ehi->probe_mask |= ATA_ALL_DEVICES; 4740 ehi->action |= ATA_EH_RESET; 4741 } 4742 } else { 4743 struct ata_device *dev = ata_find_dev(ap, devno); 4744 4745 if (dev) { 4746 struct ata_eh_info *ehi = &dev->link->eh_info; 4747 ehi->probe_mask |= 1 << dev->devno; 4748 ehi->action |= ATA_EH_RESET; 4749 } else 4750 rc = -EINVAL; 4751 } 4752 4753 if (rc == 0) { 4754 ata_port_schedule_eh(ap); 4755 spin_unlock_irqrestore(ap->lock, flags); 4756 ata_port_wait_eh(ap); 4757 } else 4758 spin_unlock_irqrestore(ap->lock, flags); 4759 4760 return rc; 4761 } 4762 4763 /** 4764 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4765 * @work: Pointer to ATA port to perform scsi_rescan_device() 4766 * 4767 * After ATA pass thru (SAT) commands are executed successfully, 4768 * libata need to propagate the changes to SCSI layer. 4769 * 4770 * LOCKING: 4771 * Kernel thread context (may sleep). 4772 */ 4773 void ata_scsi_dev_rescan(struct work_struct *work) 4774 { 4775 struct ata_port *ap = 4776 container_of(work, struct ata_port, scsi_rescan_task.work); 4777 struct ata_link *link; 4778 struct ata_device *dev; 4779 unsigned long flags; 4780 bool do_resume; 4781 int ret = 0; 4782 4783 mutex_lock(&ap->scsi_scan_mutex); 4784 spin_lock_irqsave(ap->lock, flags); 4785 4786 ata_for_each_link(link, ap, EDGE) { 4787 ata_for_each_dev(dev, link, ENABLED) { 4788 struct scsi_device *sdev = dev->sdev; 4789 4790 /* 4791 * If the port was suspended before this was scheduled, 4792 * bail out. 4793 */ 4794 if (ap->pflags & ATA_PFLAG_SUSPENDED) 4795 goto unlock_ap; 4796 4797 if (!sdev) 4798 continue; 4799 if (scsi_device_get(sdev)) 4800 continue; 4801 4802 do_resume = dev->flags & ATA_DFLAG_RESUMING; 4803 4804 spin_unlock_irqrestore(ap->lock, flags); 4805 if (do_resume) { 4806 ret = scsi_resume_device(sdev); 4807 if (ret == -EWOULDBLOCK) 4808 goto unlock_scan; 4809 dev->flags &= ~ATA_DFLAG_RESUMING; 4810 } 4811 ret = scsi_rescan_device(sdev); 4812 scsi_device_put(sdev); 4813 spin_lock_irqsave(ap->lock, flags); 4814 4815 if (ret) 4816 goto unlock_ap; 4817 } 4818 } 4819 4820 unlock_ap: 4821 spin_unlock_irqrestore(ap->lock, flags); 4822 unlock_scan: 4823 mutex_unlock(&ap->scsi_scan_mutex); 4824 4825 /* Reschedule with a delay if scsi_rescan_device() returned an error */ 4826 if (ret) 4827 schedule_delayed_work(&ap->scsi_rescan_task, 4828 msecs_to_jiffies(5)); 4829 } 4830