1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * libata-scsi.c - helper library for ATA 4 * 5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 6 * Copyright 2003-2004 Jeff Garzik 7 * 8 * libata documentation is available via 'make {ps|pdf}docs', 9 * as Documentation/driver-api/libata.rst 10 * 11 * Hardware documentation available from 12 * - http://www.t10.org/ 13 * - http://www.t13.org/ 14 */ 15 16 #include <linux/compat.h> 17 #include <linux/slab.h> 18 #include <linux/kernel.h> 19 #include <linux/blkdev.h> 20 #include <linux/spinlock.h> 21 #include <linux/export.h> 22 #include <scsi/scsi.h> 23 #include <scsi/scsi_host.h> 24 #include <scsi/scsi_cmnd.h> 25 #include <scsi/scsi_eh.h> 26 #include <scsi/scsi_device.h> 27 #include <scsi/scsi_tcq.h> 28 #include <scsi/scsi_transport.h> 29 #include <linux/libata.h> 30 #include <linux/hdreg.h> 31 #include <linux/uaccess.h> 32 #include <linux/suspend.h> 33 #include <linux/unaligned.h> 34 #include <linux/ioprio.h> 35 #include <linux/of.h> 36 37 #include "libata.h" 38 #include "libata-transport.h" 39 40 #define ATA_SCSI_RBUF_SIZE 2048 41 42 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 43 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 44 45 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 46 47 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 48 const struct scsi_device *scsidev); 49 50 #define RW_RECOVERY_MPAGE 0x1 51 #define RW_RECOVERY_MPAGE_LEN 12 52 #define CACHE_MPAGE 0x8 53 #define CACHE_MPAGE_LEN 20 54 #define CONTROL_MPAGE 0xa 55 #define CONTROL_MPAGE_LEN 12 56 #define ALL_MPAGES 0x3f 57 #define ALL_SUB_MPAGES 0xff 58 #define CDL_T2A_SUB_MPAGE 0x07 59 #define CDL_T2B_SUB_MPAGE 0x08 60 #define CDL_T2_SUB_MPAGE_LEN 232 61 #define ATA_FEATURE_SUB_MPAGE 0xf2 62 #define ATA_FEATURE_SUB_MPAGE_LEN 16 63 64 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 65 RW_RECOVERY_MPAGE, 66 RW_RECOVERY_MPAGE_LEN - 2, 67 (1 << 7), /* AWRE */ 68 0, /* read retry count */ 69 0, 0, 0, 0, 70 0, /* write retry count */ 71 0, 0, 0 72 }; 73 74 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 75 CACHE_MPAGE, 76 CACHE_MPAGE_LEN - 2, 77 0, /* contains WCE, needs to be 0 for logic */ 78 0, 0, 0, 0, 0, 0, 0, 0, 0, 79 0, /* contains DRA, needs to be 0 for logic */ 80 0, 0, 0, 0, 0, 0, 0 81 }; 82 83 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 84 CONTROL_MPAGE, 85 CONTROL_MPAGE_LEN - 2, 86 2, /* DSENSE=0, GLTSD=1 */ 87 0, /* [QAM+QERR may be 1, see 05-359r1] */ 88 0, 0, 0, 0, 0xff, 0xff, 89 0, 30 /* extended self test time, see 05-359r1 */ 90 }; 91 92 static ssize_t ata_scsi_park_show(struct device *device, 93 struct device_attribute *attr, char *buf) 94 { 95 struct scsi_device *sdev = to_scsi_device(device); 96 struct ata_port *ap; 97 struct ata_link *link; 98 struct ata_device *dev; 99 unsigned long now; 100 unsigned int msecs; 101 int rc = 0; 102 103 ap = ata_shost_to_port(sdev->host); 104 105 spin_lock_irq(ap->lock); 106 dev = ata_scsi_find_dev(ap, sdev); 107 if (!dev) { 108 rc = -ENODEV; 109 goto unlock; 110 } 111 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 112 rc = -EOPNOTSUPP; 113 goto unlock; 114 } 115 116 link = dev->link; 117 now = jiffies; 118 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 119 link->eh_context.unloaded_mask & (1 << dev->devno) && 120 time_after(dev->unpark_deadline, now)) 121 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 122 else 123 msecs = 0; 124 125 unlock: 126 spin_unlock_irq(ap->lock); 127 128 return rc ? rc : sysfs_emit(buf, "%u\n", msecs); 129 } 130 131 static ssize_t ata_scsi_park_store(struct device *device, 132 struct device_attribute *attr, 133 const char *buf, size_t len) 134 { 135 struct scsi_device *sdev = to_scsi_device(device); 136 struct ata_port *ap; 137 struct ata_device *dev; 138 int input; 139 unsigned long flags; 140 int rc; 141 142 rc = kstrtoint(buf, 10, &input); 143 if (rc) 144 return rc; 145 if (input < -2) 146 return -EINVAL; 147 if (input > ATA_TMOUT_MAX_PARK) { 148 rc = -EOVERFLOW; 149 input = ATA_TMOUT_MAX_PARK; 150 } 151 152 ap = ata_shost_to_port(sdev->host); 153 154 spin_lock_irqsave(ap->lock, flags); 155 dev = ata_scsi_find_dev(ap, sdev); 156 if (unlikely(!dev)) { 157 rc = -ENODEV; 158 goto unlock; 159 } 160 if (dev->class != ATA_DEV_ATA && 161 dev->class != ATA_DEV_ZAC) { 162 rc = -EOPNOTSUPP; 163 goto unlock; 164 } 165 166 if (input >= 0) { 167 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 168 rc = -EOPNOTSUPP; 169 goto unlock; 170 } 171 172 dev->unpark_deadline = ata_deadline(jiffies, input); 173 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 174 ata_port_schedule_eh(ap); 175 complete(&ap->park_req_pending); 176 } else { 177 switch (input) { 178 case -1: 179 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 180 break; 181 case -2: 182 dev->flags |= ATA_DFLAG_NO_UNLOAD; 183 break; 184 } 185 } 186 unlock: 187 spin_unlock_irqrestore(ap->lock, flags); 188 189 return rc ? rc : len; 190 } 191 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 192 ata_scsi_park_show, ata_scsi_park_store); 193 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 194 195 bool ata_scsi_sense_is_valid(u8 sk, u8 asc, u8 ascq) 196 { 197 /* 198 * If sk == NO_SENSE, and asc + ascq == NO ADDITIONAL SENSE INFORMATION, 199 * then there is no sense data to add. 200 */ 201 if (sk == 0 && asc == 0 && ascq == 0) 202 return false; 203 204 /* If sk > COMPLETED, sense data is bogus. */ 205 if (sk > COMPLETED) 206 return false; 207 208 return true; 209 } 210 211 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 212 u8 sk, u8 asc, u8 ascq) 213 { 214 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 215 216 scsi_build_sense(cmd, d_sense, sk, asc, ascq); 217 } 218 219 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 ata_device *dev = qc->dev; 246 struct scsi_cmnd *cmd = qc->scsicmd; 247 struct ata_taskfile *tf = &qc->result_tf; 248 unsigned char *sb = cmd->sense_buffer; 249 250 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 251 ata_dev_dbg(dev, 252 "missing result TF: can't set ATA PT sense fields\n"); 253 return; 254 } 255 256 if ((sb[0] & 0x7f) >= 0x72) { 257 unsigned char *desc; 258 u8 len; 259 260 /* descriptor format */ 261 len = sb[7]; 262 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 263 if (!desc) { 264 if (SCSI_SENSE_BUFFERSIZE < len + 14) 265 return; 266 sb[7] = len + 14; 267 desc = sb + 8 + len; 268 } 269 desc[0] = 9; 270 desc[1] = 12; 271 /* 272 * Copy registers into sense buffer. 273 */ 274 desc[2] = 0x00; 275 desc[3] = tf->error; 276 desc[5] = tf->nsect; 277 desc[7] = tf->lbal; 278 desc[9] = tf->lbam; 279 desc[11] = tf->lbah; 280 desc[12] = tf->device; 281 desc[13] = tf->status; 282 283 /* 284 * Fill in Extend bit, and the high order bytes 285 * if applicable. 286 */ 287 if (tf->flags & ATA_TFLAG_LBA48) { 288 desc[2] |= 0x01; 289 desc[4] = tf->hob_nsect; 290 desc[6] = tf->hob_lbal; 291 desc[8] = tf->hob_lbam; 292 desc[10] = tf->hob_lbah; 293 } 294 } else { 295 /* Fixed sense format */ 296 sb[0] |= 0x80; 297 sb[3] = tf->error; 298 sb[4] = tf->status; 299 sb[5] = tf->device; 300 sb[6] = tf->nsect; 301 if (tf->flags & ATA_TFLAG_LBA48) { 302 sb[8] |= 0x80; 303 if (tf->hob_nsect) 304 sb[8] |= 0x40; 305 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 306 sb[8] |= 0x20; 307 } 308 sb[9] = tf->lbal; 309 sb[10] = tf->lbam; 310 sb[11] = tf->lbah; 311 } 312 } 313 314 static void ata_scsi_set_invalid_field(struct ata_device *dev, 315 struct scsi_cmnd *cmd, u16 field, u8 bit) 316 { 317 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 318 /* "Invalid field in CDB" */ 319 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 320 field, bit, 1); 321 } 322 323 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 324 struct scsi_cmnd *cmd, u16 field) 325 { 326 /* "Invalid field in parameter list" */ 327 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 328 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 329 field, 0xff, 0); 330 } 331 332 static struct attribute *ata_common_sdev_attrs[] = { 333 &dev_attr_unload_heads.attr, 334 NULL 335 }; 336 337 static const struct attribute_group ata_common_sdev_attr_group = { 338 .attrs = ata_common_sdev_attrs 339 }; 340 341 const struct attribute_group *ata_common_sdev_groups[] = { 342 &ata_common_sdev_attr_group, 343 NULL 344 }; 345 EXPORT_SYMBOL_GPL(ata_common_sdev_groups); 346 347 /** 348 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 349 * @sdev: SCSI device for which BIOS geometry is to be determined 350 * @bdev: block device associated with @sdev 351 * @capacity: capacity of SCSI device 352 * @geom: location to which geometry will be output 353 * 354 * Generic bios head/sector/cylinder calculator 355 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 356 * mapping. Some situations may arise where the disk is not 357 * bootable if this is not used. 358 * 359 * LOCKING: 360 * Defined by the SCSI layer. We don't really care. 361 * 362 * RETURNS: 363 * Zero. 364 */ 365 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 366 sector_t capacity, int geom[]) 367 { 368 geom[0] = 255; 369 geom[1] = 63; 370 sector_div(capacity, 255*63); 371 geom[2] = capacity; 372 373 return 0; 374 } 375 EXPORT_SYMBOL_GPL(ata_std_bios_param); 376 377 /** 378 * ata_scsi_unlock_native_capacity - unlock native capacity 379 * @sdev: SCSI device to adjust device capacity for 380 * 381 * This function is called if a partition on @sdev extends beyond 382 * the end of the device. It requests EH to unlock HPA. 383 * 384 * LOCKING: 385 * Defined by the SCSI layer. Might sleep. 386 */ 387 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 388 { 389 struct ata_port *ap = ata_shost_to_port(sdev->host); 390 struct ata_device *dev; 391 unsigned long flags; 392 393 spin_lock_irqsave(ap->lock, flags); 394 395 dev = ata_scsi_find_dev(ap, sdev); 396 if (dev && dev->n_sectors < dev->n_native_sectors) { 397 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 398 dev->link->eh_info.action |= ATA_EH_RESET; 399 ata_port_schedule_eh(ap); 400 } 401 402 spin_unlock_irqrestore(ap->lock, flags); 403 ata_port_wait_eh(ap); 404 } 405 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 406 407 /** 408 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 409 * @ap: target port 410 * @sdev: SCSI device to get identify data for 411 * @arg: User buffer area for identify data 412 * 413 * LOCKING: 414 * Defined by the SCSI layer. We don't really care. 415 * 416 * RETURNS: 417 * Zero on success, negative errno on error. 418 */ 419 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 420 void __user *arg) 421 { 422 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 423 u16 __user *dst = arg; 424 char buf[40]; 425 426 if (!dev) 427 return -ENOMSG; 428 429 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 430 return -EFAULT; 431 432 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 433 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 434 return -EFAULT; 435 436 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 437 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 438 return -EFAULT; 439 440 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 441 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 442 return -EFAULT; 443 444 return 0; 445 } 446 447 /** 448 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 449 * @scsidev: Device to which we are issuing command 450 * @arg: User provided data for issuing command 451 * 452 * LOCKING: 453 * Defined by the SCSI layer. We don't really care. 454 * 455 * RETURNS: 456 * Zero on success, negative errno on error. 457 */ 458 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 459 { 460 int rc = 0; 461 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 462 u8 scsi_cmd[MAX_COMMAND_SIZE]; 463 u8 args[4], *argbuf = NULL; 464 int argsize = 0; 465 struct scsi_sense_hdr sshdr; 466 const struct scsi_exec_args exec_args = { 467 .sshdr = &sshdr, 468 .sense = sensebuf, 469 .sense_len = sizeof(sensebuf), 470 }; 471 int cmd_result; 472 473 if (arg == NULL) 474 return -EINVAL; 475 476 if (copy_from_user(args, arg, sizeof(args))) 477 return -EFAULT; 478 479 memset(sensebuf, 0, sizeof(sensebuf)); 480 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 481 482 if (args[3]) { 483 argsize = ATA_SECT_SIZE * args[3]; 484 argbuf = kmalloc(argsize, GFP_KERNEL); 485 if (argbuf == NULL) { 486 rc = -ENOMEM; 487 goto error; 488 } 489 490 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 491 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 492 block count in sector count field */ 493 } else { 494 scsi_cmd[1] = (3 << 1); /* Non-data */ 495 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 496 } 497 498 scsi_cmd[0] = ATA_16; 499 500 scsi_cmd[4] = args[2]; 501 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 502 scsi_cmd[6] = args[3]; 503 scsi_cmd[8] = args[1]; 504 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 505 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 506 } else { 507 scsi_cmd[6] = args[1]; 508 } 509 scsi_cmd[14] = args[0]; 510 511 /* Good values for timeout and retries? Values below 512 from scsi_ioctl_send_command() for default case... */ 513 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, argbuf, 514 argsize, 10 * HZ, 5, &exec_args); 515 if (cmd_result < 0) { 516 rc = cmd_result; 517 goto error; 518 } 519 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 520 u8 *desc = sensebuf + 8; 521 522 /* If we set cc then ATA pass-through will cause a 523 * check condition even if no error. Filter that. */ 524 if (scsi_status_is_check_condition(cmd_result)) { 525 if (sshdr.sense_key == RECOVERED_ERROR && 526 sshdr.asc == 0 && sshdr.ascq == 0x1d) 527 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 528 } 529 530 /* Send userspace a few ATA registers (same as drivers/ide) */ 531 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 532 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 533 args[0] = desc[13]; /* status */ 534 args[1] = desc[3]; /* error */ 535 args[2] = desc[5]; /* sector count (0:7) */ 536 if (copy_to_user(arg, args, sizeof(args))) 537 rc = -EFAULT; 538 } 539 } 540 541 542 if (cmd_result) { 543 rc = -EIO; 544 goto error; 545 } 546 547 if ((argbuf) 548 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 549 rc = -EFAULT; 550 error: 551 kfree(argbuf); 552 return rc; 553 } 554 555 /** 556 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 557 * @scsidev: Device to which we are issuing command 558 * @arg: User provided data for issuing command 559 * 560 * LOCKING: 561 * Defined by the SCSI layer. We don't really care. 562 * 563 * RETURNS: 564 * Zero on success, negative errno on error. 565 */ 566 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 567 { 568 int rc = 0; 569 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 570 u8 scsi_cmd[MAX_COMMAND_SIZE]; 571 u8 args[7]; 572 struct scsi_sense_hdr sshdr; 573 int cmd_result; 574 const struct scsi_exec_args exec_args = { 575 .sshdr = &sshdr, 576 .sense = sensebuf, 577 .sense_len = sizeof(sensebuf), 578 }; 579 580 if (arg == NULL) 581 return -EINVAL; 582 583 if (copy_from_user(args, arg, sizeof(args))) 584 return -EFAULT; 585 586 memset(sensebuf, 0, sizeof(sensebuf)); 587 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 588 scsi_cmd[0] = ATA_16; 589 scsi_cmd[1] = (3 << 1); /* Non-data */ 590 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 591 scsi_cmd[4] = args[1]; 592 scsi_cmd[6] = args[2]; 593 scsi_cmd[8] = args[3]; 594 scsi_cmd[10] = args[4]; 595 scsi_cmd[12] = args[5]; 596 scsi_cmd[13] = args[6] & 0x4f; 597 scsi_cmd[14] = args[0]; 598 599 /* Good values for timeout and retries? Values below 600 from scsi_ioctl_send_command() for default case... */ 601 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, NULL, 602 0, 10 * HZ, 5, &exec_args); 603 if (cmd_result < 0) { 604 rc = cmd_result; 605 goto error; 606 } 607 if (scsi_sense_valid(&sshdr)) {/* sense data available */ 608 u8 *desc = sensebuf + 8; 609 610 /* If we set cc then ATA pass-through will cause a 611 * check condition even if no error. Filter that. */ 612 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 613 if (sshdr.sense_key == RECOVERED_ERROR && 614 sshdr.asc == 0 && sshdr.ascq == 0x1d) 615 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 616 } 617 618 /* Send userspace ATA registers */ 619 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 620 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 621 args[0] = desc[13]; /* status */ 622 args[1] = desc[3]; /* error */ 623 args[2] = desc[5]; /* sector count (0:7) */ 624 args[3] = desc[7]; /* lbal */ 625 args[4] = desc[9]; /* lbam */ 626 args[5] = desc[11]; /* lbah */ 627 args[6] = desc[12]; /* select */ 628 if (copy_to_user(arg, args, sizeof(args))) 629 rc = -EFAULT; 630 } 631 } 632 633 if (cmd_result) { 634 rc = -EIO; 635 goto error; 636 } 637 638 error: 639 return rc; 640 } 641 642 static bool ata_ioc32(struct ata_port *ap) 643 { 644 if (ap->flags & ATA_FLAG_PIO_DMA) 645 return true; 646 if (ap->pflags & ATA_PFLAG_PIO32) 647 return true; 648 return false; 649 } 650 651 /* 652 * This handles both native and compat commands, so anything added 653 * here must have a compatible argument, or check in_compat_syscall() 654 */ 655 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 656 unsigned int cmd, void __user *arg) 657 { 658 unsigned long val; 659 int rc = -EINVAL; 660 unsigned long flags; 661 662 switch (cmd) { 663 case HDIO_GET_32BIT: 664 spin_lock_irqsave(ap->lock, flags); 665 val = ata_ioc32(ap); 666 spin_unlock_irqrestore(ap->lock, flags); 667 #ifdef CONFIG_COMPAT 668 if (in_compat_syscall()) 669 return put_user(val, (compat_ulong_t __user *)arg); 670 #endif 671 return put_user(val, (unsigned long __user *)arg); 672 673 case HDIO_SET_32BIT: 674 val = (unsigned long) arg; 675 rc = 0; 676 spin_lock_irqsave(ap->lock, flags); 677 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 678 if (val) 679 ap->pflags |= ATA_PFLAG_PIO32; 680 else 681 ap->pflags &= ~ATA_PFLAG_PIO32; 682 } else { 683 if (val != ata_ioc32(ap)) 684 rc = -EINVAL; 685 } 686 spin_unlock_irqrestore(ap->lock, flags); 687 return rc; 688 689 case HDIO_GET_IDENTITY: 690 return ata_get_identity(ap, scsidev, arg); 691 692 case HDIO_DRIVE_CMD: 693 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 694 return -EACCES; 695 return ata_cmd_ioctl(scsidev, arg); 696 697 case HDIO_DRIVE_TASK: 698 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 699 return -EACCES; 700 return ata_task_ioctl(scsidev, arg); 701 702 default: 703 rc = -ENOTTY; 704 break; 705 } 706 707 return rc; 708 } 709 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 710 711 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 712 void __user *arg) 713 { 714 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 715 scsidev, cmd, arg); 716 } 717 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 718 719 /** 720 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 721 * @dev: ATA device to which the new command is attached 722 * @cmd: SCSI command that originated this ATA command 723 * 724 * Obtain a reference to an unused ata_queued_cmd structure, 725 * which is the basic libata structure representing a single 726 * ATA command sent to the hardware. 727 * 728 * If a command was available, fill in the SCSI-specific 729 * portions of the structure with information on the 730 * current command. 731 * 732 * LOCKING: 733 * spin_lock_irqsave(host lock) 734 * 735 * RETURNS: 736 * Command allocated, or %NULL if none available. 737 */ 738 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 739 struct scsi_cmnd *cmd) 740 { 741 struct ata_port *ap = dev->link->ap; 742 struct ata_queued_cmd *qc; 743 int tag; 744 745 if (unlikely(ata_port_is_frozen(ap))) 746 goto fail; 747 748 if (ap->flags & ATA_FLAG_SAS_HOST) { 749 /* 750 * SAS hosts may queue > ATA_MAX_QUEUE commands so use 751 * unique per-device budget token as a tag. 752 */ 753 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE)) 754 goto fail; 755 tag = cmd->budget_token; 756 } else { 757 tag = scsi_cmd_to_rq(cmd)->tag; 758 } 759 760 qc = __ata_qc_from_tag(ap, tag); 761 qc->tag = qc->hw_tag = tag; 762 qc->ap = ap; 763 qc->dev = dev; 764 765 ata_qc_reinit(qc); 766 767 qc->scsicmd = cmd; 768 qc->scsidone = scsi_done; 769 770 qc->sg = scsi_sglist(cmd); 771 qc->n_elem = scsi_sg_count(cmd); 772 773 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) 774 qc->flags |= ATA_QCFLAG_QUIET; 775 776 return qc; 777 778 fail: 779 set_host_byte(cmd, DID_OK); 780 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL); 781 scsi_done(cmd); 782 return NULL; 783 } 784 785 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 786 { 787 struct scsi_cmnd *scmd = qc->scsicmd; 788 789 qc->extrabytes = scmd->extra_len; 790 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 791 } 792 793 /** 794 * ata_to_sense_error - convert ATA error to SCSI error 795 * @drv_stat: value contained in ATA status register 796 * @drv_err: value contained in ATA error register 797 * @sk: the sense key we'll fill out 798 * @asc: the additional sense code we'll fill out 799 * @ascq: the additional sense code qualifier we'll fill out 800 * 801 * Converts an ATA error into a SCSI error. Fill out pointers to 802 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 803 * format sense blocks. 804 * 805 * LOCKING: 806 * spin_lock_irqsave(host lock) 807 */ 808 static void ata_to_sense_error(u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, 809 u8 *ascq) 810 { 811 int i; 812 813 /* Based on the 3ware driver translation table */ 814 static const unsigned char sense_table[][4] = { 815 /* BBD|ECC|ID|MAR */ 816 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 817 // Device busy Aborted command 818 /* BBD|ECC|ID */ 819 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 820 // Device busy Aborted command 821 /* ECC|MC|MARK */ 822 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 823 // Device fault Hardware error 824 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 825 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 826 // Data CRC error SCSI parity error 827 /* MC|ID|ABRT|TRK0|MARK */ 828 {0x37, NOT_READY, 0x04, 0x00}, 829 // Unit offline Not ready 830 /* MCR|MARK */ 831 {0x09, NOT_READY, 0x04, 0x00}, 832 // Unrecovered disk error Not ready 833 /* Bad address mark */ 834 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 835 // Address mark not found for data field 836 /* TRK0 - Track 0 not found */ 837 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 838 // Hardware error 839 /* Abort: 0x04 is not translated here, see below */ 840 /* Media change request */ 841 {0x08, NOT_READY, 0x04, 0x00}, 842 // FIXME: faking offline 843 /* SRV/IDNF - ID not found */ 844 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 845 // Logical address out of range 846 /* MC - Media Changed */ 847 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 848 // Not ready to ready change, medium may have changed 849 /* ECC - Uncorrectable ECC error */ 850 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 851 // Unrecovered read error 852 /* BBD - block marked bad */ 853 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 854 // Block marked bad Medium error, unrecovered read error 855 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 856 }; 857 static const unsigned char stat_table[][4] = { 858 /* Must be first because BUSY means no other bits valid */ 859 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 860 // Busy, fake parity for now 861 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 862 // Device ready, unaligned write command 863 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 864 // Device fault, internal target failure 865 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 866 // Timed out in xfer, fake parity for now 867 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 868 // Recovered ECC error Medium error, recovered 869 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 870 }; 871 872 /* 873 * Is this an error we can process/parse 874 */ 875 if (drv_stat & ATA_BUSY) { 876 drv_err = 0; /* Ignore the err bits, they're invalid */ 877 } 878 879 if (drv_err) { 880 /* Look for drv_err */ 881 for (i = 0; sense_table[i][0] != 0xFF; i++) { 882 /* Look for best matches first */ 883 if ((sense_table[i][0] & drv_err) == 884 sense_table[i][0]) { 885 *sk = sense_table[i][1]; 886 *asc = sense_table[i][2]; 887 *ascq = sense_table[i][3]; 888 return; 889 } 890 } 891 } 892 893 /* 894 * Fall back to interpreting status bits. Note that if the drv_err 895 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 896 * is not descriptive enough. 897 */ 898 for (i = 0; stat_table[i][0] != 0xFF; i++) { 899 if (stat_table[i][0] & drv_stat) { 900 *sk = stat_table[i][1]; 901 *asc = stat_table[i][2]; 902 *ascq = stat_table[i][3]; 903 return; 904 } 905 } 906 907 /* 908 * We need a sensible error return here, which is tricky, and one 909 * that won't cause people to do things like return a disk wrongly. 910 */ 911 *sk = ABORTED_COMMAND; 912 *asc = 0x00; 913 *ascq = 0x00; 914 } 915 916 /* 917 * ata_gen_passthru_sense - Generate check condition sense block. 918 * @qc: Command that completed. 919 * 920 * This function is specific to the ATA pass through commands. 921 * Regardless of whether the command errored or not, return a sense 922 * block. If there was no error, we get the request from an ATA 923 * passthrough command, so we use the following sense data: 924 * sk = RECOVERED ERROR 925 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 926 * 927 * 928 * LOCKING: 929 * None. 930 */ 931 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 932 { 933 struct ata_device *dev = qc->dev; 934 struct scsi_cmnd *cmd = qc->scsicmd; 935 struct ata_taskfile *tf = &qc->result_tf; 936 u8 sense_key, asc, ascq; 937 938 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 939 ata_dev_dbg(dev, 940 "missing result TF: can't generate ATA PT sense data\n"); 941 return; 942 } 943 944 /* 945 * Use ata_to_sense_error() to map status register bits 946 * onto sense key, asc & ascq. 947 */ 948 if (qc->err_mask || 949 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 950 ata_to_sense_error(tf->status, tf->error, 951 &sense_key, &asc, &ascq); 952 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 953 } else { 954 /* 955 * ATA PASS-THROUGH INFORMATION AVAILABLE 956 * 957 * Note: we are supposed to call ata_scsi_set_sense(), which 958 * respects the D_SENSE bit, instead of unconditionally 959 * generating the sense data in descriptor format. However, 960 * because hdparm, hddtemp, and udisks incorrectly assume sense 961 * data in descriptor format, without even looking at the 962 * RESPONSE CODE field in the returned sense data (to see which 963 * format the returned sense data is in), we are stuck with 964 * being bug compatible with older kernels. 965 */ 966 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 967 } 968 } 969 970 /** 971 * ata_gen_ata_sense - generate a SCSI fixed sense block 972 * @qc: Command that we are erroring out 973 * 974 * Generate sense block for a failed ATA command @qc. Descriptor 975 * format is used to accommodate LBA48 block address. 976 * 977 * LOCKING: 978 * None. 979 */ 980 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 981 { 982 struct ata_device *dev = qc->dev; 983 struct scsi_cmnd *cmd = qc->scsicmd; 984 struct ata_taskfile *tf = &qc->result_tf; 985 unsigned char *sb = cmd->sense_buffer; 986 u64 block; 987 u8 sense_key, asc, ascq; 988 989 if (ata_dev_disabled(dev)) { 990 /* Device disabled after error recovery */ 991 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 992 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 993 return; 994 } 995 996 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 997 ata_dev_dbg(dev, 998 "missing result TF: can't generate sense data\n"); 999 return; 1000 } 1001 1002 /* Use ata_to_sense_error() to map status register bits 1003 * onto sense key, asc & ascq. 1004 */ 1005 if (qc->err_mask || 1006 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1007 ata_to_sense_error(tf->status, tf->error, 1008 &sense_key, &asc, &ascq); 1009 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1010 } else { 1011 /* Could not decode error */ 1012 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1013 tf->status, qc->err_mask); 1014 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1015 return; 1016 } 1017 1018 block = ata_tf_read_block(&qc->result_tf, dev); 1019 if (block == U64_MAX) 1020 return; 1021 1022 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1023 } 1024 1025 void ata_scsi_sdev_config(struct scsi_device *sdev) 1026 { 1027 sdev->use_10_for_rw = 1; 1028 sdev->use_10_for_ms = 1; 1029 sdev->no_write_same = 1; 1030 1031 /* Schedule policy is determined by ->qc_defer() callback and 1032 * it needs to see every deferred qc. Set dev_blocked to 1 to 1033 * prevent SCSI midlayer from automatically deferring 1034 * requests. 1035 */ 1036 sdev->max_device_blocked = 1; 1037 } 1038 1039 /** 1040 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1041 * @rq: request to be checked 1042 * 1043 * ATAPI commands which transfer variable length data to host 1044 * might overflow due to application error or hardware bug. This 1045 * function checks whether overflow should be drained and ignored 1046 * for @request. 1047 * 1048 * LOCKING: 1049 * None. 1050 * 1051 * RETURNS: 1052 * 1 if ; otherwise, 0. 1053 */ 1054 bool ata_scsi_dma_need_drain(struct request *rq) 1055 { 1056 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1057 1058 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1059 } 1060 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1061 1062 int ata_scsi_dev_config(struct scsi_device *sdev, struct queue_limits *lim, 1063 struct ata_device *dev) 1064 { 1065 int depth = 1; 1066 1067 if (!ata_id_has_unload(dev->id)) 1068 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1069 1070 /* configure max sectors */ 1071 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1072 lim->max_hw_sectors = dev->max_sectors; 1073 1074 if (dev->class == ATA_DEV_ATAPI) { 1075 sdev->sector_size = ATA_SECT_SIZE; 1076 1077 /* set DMA padding */ 1078 lim->dma_pad_mask = ATA_DMA_PAD_SZ - 1; 1079 1080 /* make room for appending the drain */ 1081 lim->max_segments--; 1082 1083 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1084 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1085 if (!sdev->dma_drain_buf) { 1086 ata_dev_err(dev, "drain buffer allocation failed\n"); 1087 return -ENOMEM; 1088 } 1089 } else { 1090 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1091 1092 /* 1093 * Ask the sd driver to issue START STOP UNIT on runtime suspend 1094 * and resume and shutdown only. For system level suspend/resume, 1095 * devices power state is handled directly by libata EH. 1096 * Given that disks are always spun up on system resume, also 1097 * make sure that the sd driver forces runtime suspended disks 1098 * to be resumed to correctly reflect the power state of the 1099 * device. 1100 */ 1101 sdev->manage_runtime_start_stop = 1; 1102 sdev->manage_shutdown = 1; 1103 sdev->force_runtime_start_on_system_start = 1; 1104 } 1105 1106 /* 1107 * ata_pio_sectors() expects buffer for each sector to not cross 1108 * page boundary. Enforce it by requiring buffers to be sector 1109 * aligned, which works iff sector_size is not larger than 1110 * PAGE_SIZE. ATAPI devices also need the alignment as 1111 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1112 */ 1113 if (sdev->sector_size > PAGE_SIZE) 1114 ata_dev_warn(dev, 1115 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1116 sdev->sector_size); 1117 1118 lim->dma_alignment = sdev->sector_size - 1; 1119 1120 if (dev->flags & ATA_DFLAG_AN) 1121 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1122 1123 if (ata_ncq_supported(dev)) 1124 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1125 depth = min(ATA_MAX_QUEUE, depth); 1126 scsi_change_queue_depth(sdev, depth); 1127 1128 if (dev->flags & ATA_DFLAG_TRUSTED) 1129 sdev->security_supported = 1; 1130 1131 dev->sdev = sdev; 1132 return 0; 1133 } 1134 1135 /** 1136 * ata_scsi_slave_alloc - Early setup of SCSI device 1137 * @sdev: SCSI device to examine 1138 * 1139 * This is called from scsi_alloc_sdev() when the scsi device 1140 * associated with an ATA device is scanned on a port. 1141 * 1142 * LOCKING: 1143 * Defined by SCSI layer. We don't really care. 1144 */ 1145 1146 int ata_scsi_slave_alloc(struct scsi_device *sdev) 1147 { 1148 struct ata_port *ap = ata_shost_to_port(sdev->host); 1149 struct device_link *link; 1150 1151 ata_scsi_sdev_config(sdev); 1152 1153 /* 1154 * Create a link from the ata_port device to the scsi device to ensure 1155 * that PM does suspend/resume in the correct order: the scsi device is 1156 * consumer (child) and the ata port the supplier (parent). 1157 */ 1158 link = device_link_add(&sdev->sdev_gendev, &ap->tdev, 1159 DL_FLAG_STATELESS | 1160 DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); 1161 if (!link) { 1162 ata_port_err(ap, "Failed to create link to scsi device %s\n", 1163 dev_name(&sdev->sdev_gendev)); 1164 return -ENODEV; 1165 } 1166 1167 return 0; 1168 } 1169 EXPORT_SYMBOL_GPL(ata_scsi_slave_alloc); 1170 1171 /** 1172 * ata_scsi_device_configure - Set SCSI device attributes 1173 * @sdev: SCSI device to examine 1174 * @lim: queue limits 1175 * 1176 * This is called before we actually start reading 1177 * and writing to the device, to configure certain 1178 * SCSI mid-layer behaviors. 1179 * 1180 * LOCKING: 1181 * Defined by SCSI layer. We don't really care. 1182 */ 1183 1184 int ata_scsi_device_configure(struct scsi_device *sdev, 1185 struct queue_limits *lim) 1186 { 1187 struct ata_port *ap = ata_shost_to_port(sdev->host); 1188 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1189 1190 if (dev) 1191 return ata_scsi_dev_config(sdev, lim, dev); 1192 1193 return 0; 1194 } 1195 EXPORT_SYMBOL_GPL(ata_scsi_device_configure); 1196 1197 /** 1198 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1199 * @sdev: SCSI device to be destroyed 1200 * 1201 * @sdev is about to be destroyed for hot/warm unplugging. If 1202 * this unplugging was initiated by libata as indicated by NULL 1203 * dev->sdev, this function doesn't have to do anything. 1204 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1205 * Clear dev->sdev, schedule the device for ATA detach and invoke 1206 * EH. 1207 * 1208 * LOCKING: 1209 * Defined by SCSI layer. We don't really care. 1210 */ 1211 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1212 { 1213 struct ata_port *ap = ata_shost_to_port(sdev->host); 1214 unsigned long flags; 1215 struct ata_device *dev; 1216 1217 device_link_remove(&sdev->sdev_gendev, &ap->tdev); 1218 1219 spin_lock_irqsave(ap->lock, flags); 1220 dev = __ata_scsi_find_dev(ap, sdev); 1221 if (dev && dev->sdev) { 1222 /* SCSI device already in CANCEL state, no need to offline it */ 1223 dev->sdev = NULL; 1224 dev->flags |= ATA_DFLAG_DETACH; 1225 ata_port_schedule_eh(ap); 1226 } 1227 spin_unlock_irqrestore(ap->lock, flags); 1228 1229 kfree(sdev->dma_drain_buf); 1230 } 1231 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1232 1233 /** 1234 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1235 * @qc: Storage for translated ATA taskfile 1236 * 1237 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1238 * (to start). Perhaps these commands should be preceded by 1239 * CHECK POWER MODE to see what power mode the device is already in. 1240 * [See SAT revision 5 at www.t10.org] 1241 * 1242 * LOCKING: 1243 * spin_lock_irqsave(host lock) 1244 * 1245 * RETURNS: 1246 * Zero on success, non-zero on error. 1247 */ 1248 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1249 { 1250 struct scsi_cmnd *scmd = qc->scsicmd; 1251 const u8 *cdb = scmd->cmnd; 1252 u16 fp; 1253 u8 bp = 0xff; 1254 1255 if (scmd->cmd_len < 5) { 1256 fp = 4; 1257 goto invalid_fld; 1258 } 1259 1260 /* LOEJ bit set not supported */ 1261 if (cdb[4] & 0x2) { 1262 fp = 4; 1263 bp = 1; 1264 goto invalid_fld; 1265 } 1266 1267 /* Power conditions not supported */ 1268 if (((cdb[4] >> 4) & 0xf) != 0) { 1269 fp = 4; 1270 bp = 3; 1271 goto invalid_fld; 1272 } 1273 1274 /* Ignore IMMED bit (cdb[1] & 0x1), violates sat-r05 */ 1275 if (!ata_dev_power_init_tf(qc->dev, &qc->tf, cdb[4] & 0x1)) { 1276 ata_scsi_set_sense(qc->dev, scmd, ABORTED_COMMAND, 0, 0); 1277 return 1; 1278 } 1279 1280 /* 1281 * Standby and Idle condition timers could be implemented but that 1282 * would require libata to implement the Power condition mode page 1283 * and allow the user to change it. Changing mode pages requires 1284 * MODE SELECT to be implemented. 1285 */ 1286 1287 return 0; 1288 1289 invalid_fld: 1290 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1291 return 1; 1292 } 1293 1294 /** 1295 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1296 * @qc: Storage for translated ATA taskfile 1297 * 1298 * Sets up an ATA taskfile to issue FLUSH CACHE or 1299 * FLUSH CACHE EXT. 1300 * 1301 * LOCKING: 1302 * spin_lock_irqsave(host lock) 1303 * 1304 * RETURNS: 1305 * Zero on success, non-zero on error. 1306 */ 1307 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1308 { 1309 struct ata_taskfile *tf = &qc->tf; 1310 1311 tf->flags |= ATA_TFLAG_DEVICE; 1312 tf->protocol = ATA_PROT_NODATA; 1313 1314 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1315 tf->command = ATA_CMD_FLUSH_EXT; 1316 else 1317 tf->command = ATA_CMD_FLUSH; 1318 1319 /* flush is critical for IO integrity, consider it an IO command */ 1320 qc->flags |= ATA_QCFLAG_IO; 1321 1322 return 0; 1323 } 1324 1325 /** 1326 * scsi_6_lba_len - Get LBA and transfer length 1327 * @cdb: SCSI command to translate 1328 * 1329 * Calculate LBA and transfer length for 6-byte commands. 1330 * 1331 * RETURNS: 1332 * @plba: the LBA 1333 * @plen: the transfer length 1334 */ 1335 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1336 { 1337 u64 lba = 0; 1338 u32 len; 1339 1340 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1341 lba |= ((u64)cdb[2]) << 8; 1342 lba |= ((u64)cdb[3]); 1343 1344 len = cdb[4]; 1345 1346 *plba = lba; 1347 *plen = len; 1348 } 1349 1350 /** 1351 * scsi_10_lba_len - Get LBA and transfer length 1352 * @cdb: SCSI command to translate 1353 * 1354 * Calculate LBA and transfer length for 10-byte commands. 1355 * 1356 * RETURNS: 1357 * @plba: the LBA 1358 * @plen: the transfer length 1359 */ 1360 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1361 { 1362 *plba = get_unaligned_be32(&cdb[2]); 1363 *plen = get_unaligned_be16(&cdb[7]); 1364 } 1365 1366 /** 1367 * scsi_16_lba_len - Get LBA and transfer length 1368 * @cdb: SCSI command to translate 1369 * 1370 * Calculate LBA and transfer length for 16-byte commands. 1371 * 1372 * RETURNS: 1373 * @plba: the LBA 1374 * @plen: the transfer length 1375 */ 1376 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1377 { 1378 *plba = get_unaligned_be64(&cdb[2]); 1379 *plen = get_unaligned_be32(&cdb[10]); 1380 } 1381 1382 /** 1383 * scsi_dld - Get duration limit descriptor index 1384 * @cdb: SCSI command to translate 1385 * 1386 * Returns the dld bits indicating the index of a command duration limit 1387 * descriptor. 1388 */ 1389 static inline int scsi_dld(const u8 *cdb) 1390 { 1391 return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03); 1392 } 1393 1394 /** 1395 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1396 * @qc: Storage for translated ATA taskfile 1397 * 1398 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1399 * 1400 * LOCKING: 1401 * spin_lock_irqsave(host lock) 1402 * 1403 * RETURNS: 1404 * Zero on success, non-zero on error. 1405 */ 1406 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1407 { 1408 struct scsi_cmnd *scmd = qc->scsicmd; 1409 struct ata_taskfile *tf = &qc->tf; 1410 struct ata_device *dev = qc->dev; 1411 u64 dev_sectors = qc->dev->n_sectors; 1412 const u8 *cdb = scmd->cmnd; 1413 u64 block; 1414 u32 n_block; 1415 u16 fp; 1416 1417 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1418 tf->protocol = ATA_PROT_NODATA; 1419 1420 switch (cdb[0]) { 1421 case VERIFY: 1422 if (scmd->cmd_len < 10) { 1423 fp = 9; 1424 goto invalid_fld; 1425 } 1426 scsi_10_lba_len(cdb, &block, &n_block); 1427 break; 1428 case VERIFY_16: 1429 if (scmd->cmd_len < 16) { 1430 fp = 15; 1431 goto invalid_fld; 1432 } 1433 scsi_16_lba_len(cdb, &block, &n_block); 1434 break; 1435 default: 1436 fp = 0; 1437 goto invalid_fld; 1438 } 1439 1440 if (!n_block) 1441 goto nothing_to_do; 1442 if (block >= dev_sectors) 1443 goto out_of_range; 1444 if ((block + n_block) > dev_sectors) 1445 goto out_of_range; 1446 1447 if (dev->flags & ATA_DFLAG_LBA) { 1448 tf->flags |= ATA_TFLAG_LBA; 1449 1450 if (lba_28_ok(block, n_block)) { 1451 /* use LBA28 */ 1452 tf->command = ATA_CMD_VERIFY; 1453 tf->device |= (block >> 24) & 0xf; 1454 } else if (lba_48_ok(block, n_block)) { 1455 if (!(dev->flags & ATA_DFLAG_LBA48)) 1456 goto out_of_range; 1457 1458 /* use LBA48 */ 1459 tf->flags |= ATA_TFLAG_LBA48; 1460 tf->command = ATA_CMD_VERIFY_EXT; 1461 1462 tf->hob_nsect = (n_block >> 8) & 0xff; 1463 1464 tf->hob_lbah = (block >> 40) & 0xff; 1465 tf->hob_lbam = (block >> 32) & 0xff; 1466 tf->hob_lbal = (block >> 24) & 0xff; 1467 } else 1468 /* request too large even for LBA48 */ 1469 goto out_of_range; 1470 1471 tf->nsect = n_block & 0xff; 1472 1473 tf->lbah = (block >> 16) & 0xff; 1474 tf->lbam = (block >> 8) & 0xff; 1475 tf->lbal = block & 0xff; 1476 1477 tf->device |= ATA_LBA; 1478 } else { 1479 /* CHS */ 1480 u32 sect, head, cyl, track; 1481 1482 if (!lba_28_ok(block, n_block)) 1483 goto out_of_range; 1484 1485 /* Convert LBA to CHS */ 1486 track = (u32)block / dev->sectors; 1487 cyl = track / dev->heads; 1488 head = track % dev->heads; 1489 sect = (u32)block % dev->sectors + 1; 1490 1491 /* Check whether the converted CHS can fit. 1492 Cylinder: 0-65535 1493 Head: 0-15 1494 Sector: 1-255*/ 1495 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1496 goto out_of_range; 1497 1498 tf->command = ATA_CMD_VERIFY; 1499 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1500 tf->lbal = sect; 1501 tf->lbam = cyl; 1502 tf->lbah = cyl >> 8; 1503 tf->device |= head; 1504 } 1505 1506 return 0; 1507 1508 invalid_fld: 1509 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1510 return 1; 1511 1512 out_of_range: 1513 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1514 /* "Logical Block Address out of range" */ 1515 return 1; 1516 1517 nothing_to_do: 1518 scmd->result = SAM_STAT_GOOD; 1519 return 1; 1520 } 1521 1522 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1523 { 1524 struct request *rq = scsi_cmd_to_rq(scmd); 1525 u32 req_blocks; 1526 1527 if (!blk_rq_is_passthrough(rq)) 1528 return true; 1529 1530 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1531 if (n_blocks > req_blocks) 1532 return false; 1533 1534 return true; 1535 } 1536 1537 /** 1538 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1539 * @qc: Storage for translated ATA taskfile 1540 * 1541 * Converts any of six SCSI read/write commands into the 1542 * ATA counterpart, including starting sector (LBA), 1543 * sector count, and taking into account the device's LBA48 1544 * support. 1545 * 1546 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1547 * %WRITE_16 are currently supported. 1548 * 1549 * LOCKING: 1550 * spin_lock_irqsave(host lock) 1551 * 1552 * RETURNS: 1553 * Zero on success, non-zero on error. 1554 */ 1555 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1556 { 1557 struct scsi_cmnd *scmd = qc->scsicmd; 1558 const u8 *cdb = scmd->cmnd; 1559 struct request *rq = scsi_cmd_to_rq(scmd); 1560 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1561 unsigned int tf_flags = 0; 1562 int dld = 0; 1563 u64 block; 1564 u32 n_block; 1565 int rc; 1566 u16 fp = 0; 1567 1568 switch (cdb[0]) { 1569 case WRITE_6: 1570 case WRITE_10: 1571 case WRITE_16: 1572 tf_flags |= ATA_TFLAG_WRITE; 1573 break; 1574 } 1575 1576 /* Calculate the SCSI LBA, transfer length and FUA. */ 1577 switch (cdb[0]) { 1578 case READ_10: 1579 case WRITE_10: 1580 if (unlikely(scmd->cmd_len < 10)) { 1581 fp = 9; 1582 goto invalid_fld; 1583 } 1584 scsi_10_lba_len(cdb, &block, &n_block); 1585 if (cdb[1] & (1 << 3)) 1586 tf_flags |= ATA_TFLAG_FUA; 1587 if (!ata_check_nblocks(scmd, n_block)) 1588 goto invalid_fld; 1589 break; 1590 case READ_6: 1591 case WRITE_6: 1592 if (unlikely(scmd->cmd_len < 6)) { 1593 fp = 5; 1594 goto invalid_fld; 1595 } 1596 scsi_6_lba_len(cdb, &block, &n_block); 1597 1598 /* for 6-byte r/w commands, transfer length 0 1599 * means 256 blocks of data, not 0 block. 1600 */ 1601 if (!n_block) 1602 n_block = 256; 1603 if (!ata_check_nblocks(scmd, n_block)) 1604 goto invalid_fld; 1605 break; 1606 case READ_16: 1607 case WRITE_16: 1608 if (unlikely(scmd->cmd_len < 16)) { 1609 fp = 15; 1610 goto invalid_fld; 1611 } 1612 scsi_16_lba_len(cdb, &block, &n_block); 1613 dld = scsi_dld(cdb); 1614 if (cdb[1] & (1 << 3)) 1615 tf_flags |= ATA_TFLAG_FUA; 1616 if (!ata_check_nblocks(scmd, n_block)) 1617 goto invalid_fld; 1618 break; 1619 default: 1620 fp = 0; 1621 goto invalid_fld; 1622 } 1623 1624 /* Check and compose ATA command */ 1625 if (!n_block) 1626 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1627 * length 0 means transfer 0 block of data. 1628 * However, for ATA R/W commands, sector count 0 means 1629 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1630 * 1631 * WARNING: one or two older ATA drives treat 0 as 0... 1632 */ 1633 goto nothing_to_do; 1634 1635 qc->flags |= ATA_QCFLAG_IO; 1636 qc->nbytes = n_block * scmd->device->sector_size; 1637 1638 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class); 1639 if (likely(rc == 0)) 1640 return 0; 1641 1642 if (rc == -ERANGE) 1643 goto out_of_range; 1644 /* treat all other errors as -EINVAL, fall through */ 1645 invalid_fld: 1646 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1647 return 1; 1648 1649 out_of_range: 1650 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1651 /* "Logical Block Address out of range" */ 1652 return 1; 1653 1654 nothing_to_do: 1655 scmd->result = SAM_STAT_GOOD; 1656 return 1; 1657 } 1658 1659 static void ata_qc_done(struct ata_queued_cmd *qc) 1660 { 1661 struct scsi_cmnd *cmd = qc->scsicmd; 1662 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1663 1664 ata_qc_free(qc); 1665 done(cmd); 1666 } 1667 1668 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1669 { 1670 struct scsi_cmnd *cmd = qc->scsicmd; 1671 u8 *cdb = cmd->cmnd; 1672 bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID; 1673 bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12; 1674 bool is_ck_cond_request = cdb[2] & 0x20; 1675 bool is_error = qc->err_mask != 0; 1676 1677 /* For ATA pass thru (SAT) commands, generate a sense block if 1678 * user mandated it or if there's an error. Note that if we 1679 * generate because the user forced us to [CK_COND=1], a check 1680 * condition is generated and the ATA register values are returned 1681 * whether the command completed successfully or not. If there 1682 * was no error, and CK_COND=1, we use the following sense data: 1683 * sk = RECOVERED ERROR 1684 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1685 */ 1686 if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) { 1687 if (!have_sense) 1688 ata_gen_passthru_sense(qc); 1689 ata_scsi_set_passthru_sense_fields(qc); 1690 if (is_ck_cond_request) 1691 set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); 1692 } else if (is_error && !have_sense) { 1693 ata_gen_ata_sense(qc); 1694 } 1695 1696 ata_qc_done(qc); 1697 } 1698 1699 /** 1700 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1701 * @dev: ATA device to which the command is addressed 1702 * @cmd: SCSI command to execute 1703 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1704 * 1705 * Our ->queuecommand() function has decided that the SCSI 1706 * command issued can be directly translated into an ATA 1707 * command, rather than handled internally. 1708 * 1709 * This function sets up an ata_queued_cmd structure for the 1710 * SCSI command, and sends that ata_queued_cmd to the hardware. 1711 * 1712 * The xlat_func argument (actor) returns 0 if ready to execute 1713 * ATA command, else 1 to finish translation. If 1 is returned 1714 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1715 * to be set reflecting an error condition or clean (early) 1716 * termination. 1717 * 1718 * LOCKING: 1719 * spin_lock_irqsave(host lock) 1720 * 1721 * RETURNS: 1722 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1723 * needs to be deferred. 1724 */ 1725 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1726 ata_xlat_func_t xlat_func) 1727 { 1728 struct ata_port *ap = dev->link->ap; 1729 struct ata_queued_cmd *qc; 1730 int rc; 1731 1732 qc = ata_scsi_qc_new(dev, cmd); 1733 if (!qc) 1734 goto err_mem; 1735 1736 /* data is present; dma-map it */ 1737 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1738 cmd->sc_data_direction == DMA_TO_DEVICE) { 1739 if (unlikely(scsi_bufflen(cmd) < 1)) { 1740 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1741 goto err_did; 1742 } 1743 1744 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1745 1746 qc->dma_dir = cmd->sc_data_direction; 1747 } 1748 1749 qc->complete_fn = ata_scsi_qc_complete; 1750 1751 if (xlat_func(qc)) 1752 goto early_finish; 1753 1754 if (ap->ops->qc_defer) { 1755 if ((rc = ap->ops->qc_defer(qc))) 1756 goto defer; 1757 } 1758 1759 /* select device, send command to hardware */ 1760 ata_qc_issue(qc); 1761 1762 return 0; 1763 1764 early_finish: 1765 ata_qc_free(qc); 1766 scsi_done(cmd); 1767 return 0; 1768 1769 err_did: 1770 ata_qc_free(qc); 1771 cmd->result = (DID_ERROR << 16); 1772 scsi_done(cmd); 1773 err_mem: 1774 return 0; 1775 1776 defer: 1777 ata_qc_free(qc); 1778 if (rc == ATA_DEFER_LINK) 1779 return SCSI_MLQUEUE_DEVICE_BUSY; 1780 else 1781 return SCSI_MLQUEUE_HOST_BUSY; 1782 } 1783 1784 struct ata_scsi_args { 1785 struct ata_device *dev; 1786 u16 *id; 1787 struct scsi_cmnd *cmd; 1788 }; 1789 1790 /** 1791 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1792 * @args: device IDENTIFY data / SCSI command of interest. 1793 * @actor: Callback hook for desired SCSI command simulator 1794 * 1795 * Takes care of the hard work of simulating a SCSI command... 1796 * Mapping the response buffer, calling the command's handler, 1797 * and handling the handler's return value. This return value 1798 * indicates whether the handler wishes the SCSI command to be 1799 * completed successfully (0), or not (in which case cmd->result 1800 * and sense buffer are assumed to be set). 1801 * 1802 * LOCKING: 1803 * spin_lock_irqsave(host lock) 1804 */ 1805 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1806 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1807 { 1808 unsigned int rc; 1809 struct scsi_cmnd *cmd = args->cmd; 1810 unsigned long flags; 1811 1812 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1813 1814 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1815 rc = actor(args, ata_scsi_rbuf); 1816 if (rc == 0) 1817 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1818 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1819 1820 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1821 1822 if (rc == 0) 1823 cmd->result = SAM_STAT_GOOD; 1824 } 1825 1826 /** 1827 * ata_scsiop_inq_std - Simulate INQUIRY command 1828 * @args: device IDENTIFY data / SCSI command of interest. 1829 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1830 * 1831 * Returns standard device identification data associated 1832 * with non-VPD INQUIRY command output. 1833 * 1834 * LOCKING: 1835 * spin_lock_irqsave(host lock) 1836 */ 1837 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1838 { 1839 static const u8 versions[] = { 1840 0x00, 1841 0x60, /* SAM-3 (no version claimed) */ 1842 1843 0x03, 1844 0x20, /* SBC-2 (no version claimed) */ 1845 1846 0x03, 1847 0x00 /* SPC-3 (no version claimed) */ 1848 }; 1849 static const u8 versions_zbc[] = { 1850 0x00, 1851 0xA0, /* SAM-5 (no version claimed) */ 1852 1853 0x06, 1854 0x00, /* SBC-4 (no version claimed) */ 1855 1856 0x05, 1857 0xC0, /* SPC-5 (no version claimed) */ 1858 1859 0x60, 1860 0x24, /* ZBC r05 */ 1861 }; 1862 1863 u8 hdr[] = { 1864 TYPE_DISK, 1865 0, 1866 0x5, /* claim SPC-3 version compatibility */ 1867 2, 1868 95 - 4, 1869 0, 1870 0, 1871 2 1872 }; 1873 1874 /* 1875 * Set the SCSI Removable Media Bit (RMB) if the ATA removable media 1876 * device bit (obsolete since ATA-8 ACS) is set. 1877 */ 1878 if (ata_id_removable(args->id)) 1879 hdr[1] |= (1 << 7); 1880 1881 if (args->dev->class == ATA_DEV_ZAC) { 1882 hdr[0] = TYPE_ZBC; 1883 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1884 } 1885 1886 if (args->dev->flags & ATA_DFLAG_CDL) 1887 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 1888 1889 memcpy(rbuf, hdr, sizeof(hdr)); 1890 memcpy(&rbuf[8], "ATA ", 8); 1891 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1892 1893 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1894 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1895 if (strncmp(&rbuf[32], " ", 4) == 0) 1896 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1897 1898 if (rbuf[32] == 0 || rbuf[32] == ' ') 1899 memcpy(&rbuf[32], "n/a ", 4); 1900 1901 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1902 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1903 else 1904 memcpy(rbuf + 58, versions, sizeof(versions)); 1905 1906 return 0; 1907 } 1908 1909 /** 1910 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1911 * @args: device IDENTIFY data / SCSI command of interest. 1912 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1913 * 1914 * Returns list of inquiry VPD pages available. 1915 * 1916 * LOCKING: 1917 * spin_lock_irqsave(host lock) 1918 */ 1919 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1920 { 1921 int i, num_pages = 0; 1922 static const u8 pages[] = { 1923 0x00, /* page 0x00, this page */ 1924 0x80, /* page 0x80, unit serial no page */ 1925 0x83, /* page 0x83, device ident page */ 1926 0x89, /* page 0x89, ata info page */ 1927 0xb0, /* page 0xb0, block limits page */ 1928 0xb1, /* page 0xb1, block device characteristics page */ 1929 0xb2, /* page 0xb2, thin provisioning page */ 1930 0xb6, /* page 0xb6, zoned block device characteristics */ 1931 0xb9, /* page 0xb9, concurrent positioning ranges */ 1932 }; 1933 1934 for (i = 0; i < sizeof(pages); i++) { 1935 if (pages[i] == 0xb6 && 1936 !(args->dev->flags & ATA_DFLAG_ZAC)) 1937 continue; 1938 rbuf[num_pages + 4] = pages[i]; 1939 num_pages++; 1940 } 1941 rbuf[3] = num_pages; /* number of supported VPD pages */ 1942 return 0; 1943 } 1944 1945 /** 1946 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1947 * @args: device IDENTIFY data / SCSI command of interest. 1948 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1949 * 1950 * Returns ATA device serial number. 1951 * 1952 * LOCKING: 1953 * spin_lock_irqsave(host lock) 1954 */ 1955 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1956 { 1957 static const u8 hdr[] = { 1958 0, 1959 0x80, /* this page code */ 1960 0, 1961 ATA_ID_SERNO_LEN, /* page len */ 1962 }; 1963 1964 memcpy(rbuf, hdr, sizeof(hdr)); 1965 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1966 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1967 return 0; 1968 } 1969 1970 /** 1971 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1972 * @args: device IDENTIFY data / SCSI command of interest. 1973 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1974 * 1975 * Yields two logical unit device identification designators: 1976 * - vendor specific ASCII containing the ATA serial number 1977 * - SAT defined "t10 vendor id based" containing ASCII vendor 1978 * name ("ATA "), model and serial numbers. 1979 * 1980 * LOCKING: 1981 * spin_lock_irqsave(host lock) 1982 */ 1983 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 1984 { 1985 const int sat_model_serial_desc_len = 68; 1986 int num; 1987 1988 rbuf[1] = 0x83; /* this page code */ 1989 num = 4; 1990 1991 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1992 rbuf[num + 0] = 2; 1993 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1994 num += 4; 1995 ata_id_string(args->id, (unsigned char *) rbuf + num, 1996 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1997 num += ATA_ID_SERNO_LEN; 1998 1999 /* SAT defined lu model and serial numbers descriptor */ 2000 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2001 rbuf[num + 0] = 2; 2002 rbuf[num + 1] = 1; 2003 rbuf[num + 3] = sat_model_serial_desc_len; 2004 num += 4; 2005 memcpy(rbuf + num, "ATA ", 8); 2006 num += 8; 2007 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2008 ATA_ID_PROD_LEN); 2009 num += ATA_ID_PROD_LEN; 2010 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2011 ATA_ID_SERNO_LEN); 2012 num += ATA_ID_SERNO_LEN; 2013 2014 if (ata_id_has_wwn(args->id)) { 2015 /* SAT defined lu world wide name */ 2016 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2017 rbuf[num + 0] = 1; 2018 rbuf[num + 1] = 3; 2019 rbuf[num + 3] = ATA_ID_WWN_LEN; 2020 num += 4; 2021 ata_id_string(args->id, (unsigned char *) rbuf + num, 2022 ATA_ID_WWN, ATA_ID_WWN_LEN); 2023 num += ATA_ID_WWN_LEN; 2024 } 2025 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2026 return 0; 2027 } 2028 2029 /** 2030 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2031 * @args: device IDENTIFY data / SCSI command of interest. 2032 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2033 * 2034 * Yields SAT-specified ATA VPD page. 2035 * 2036 * LOCKING: 2037 * spin_lock_irqsave(host lock) 2038 */ 2039 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2040 { 2041 rbuf[1] = 0x89; /* our page code */ 2042 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2043 rbuf[3] = (0x238 & 0xff); 2044 2045 memcpy(&rbuf[8], "linux ", 8); 2046 memcpy(&rbuf[16], "libata ", 16); 2047 memcpy(&rbuf[32], DRV_VERSION, 4); 2048 2049 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2050 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2051 /* TODO: PMP? */ 2052 2053 /* we don't store the ATA device signature, so we fake it */ 2054 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2055 rbuf[40] = 0x1; 2056 rbuf[48] = 0x1; 2057 2058 rbuf[56] = ATA_CMD_ID_ATA; 2059 2060 memcpy(&rbuf[60], &args->id[0], 512); 2061 return 0; 2062 } 2063 2064 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2065 { 2066 struct ata_device *dev = args->dev; 2067 u16 min_io_sectors; 2068 2069 rbuf[1] = 0xb0; 2070 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2071 2072 /* 2073 * Optimal transfer length granularity. 2074 * 2075 * This is always one physical block, but for disks with a smaller 2076 * logical than physical sector size we need to figure out what the 2077 * latter is. 2078 */ 2079 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2080 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2081 2082 /* 2083 * Optimal unmap granularity. 2084 * 2085 * The ATA spec doesn't even know about a granularity or alignment 2086 * for the TRIM command. We can leave away most of the unmap related 2087 * VPD page entries, but we have specifify a granularity to signal 2088 * that we support some form of unmap - in thise case via WRITE SAME 2089 * with the unmap bit set. 2090 */ 2091 if (ata_id_has_trim(args->id)) { 2092 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2093 2094 if (dev->quirks & ATA_QUIRK_MAX_TRIM_128M) 2095 max_blocks = 128 << (20 - SECTOR_SHIFT); 2096 2097 put_unaligned_be64(max_blocks, &rbuf[36]); 2098 put_unaligned_be32(1, &rbuf[28]); 2099 } 2100 2101 return 0; 2102 } 2103 2104 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2105 { 2106 int form_factor = ata_id_form_factor(args->id); 2107 int media_rotation_rate = ata_id_rotation_rate(args->id); 2108 u8 zoned = ata_id_zoned_cap(args->id); 2109 2110 rbuf[1] = 0xb1; 2111 rbuf[3] = 0x3c; 2112 rbuf[4] = media_rotation_rate >> 8; 2113 rbuf[5] = media_rotation_rate; 2114 rbuf[7] = form_factor; 2115 if (zoned) 2116 rbuf[8] = (zoned << 4); 2117 2118 return 0; 2119 } 2120 2121 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2122 { 2123 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2124 rbuf[1] = 0xb2; 2125 rbuf[3] = 0x4; 2126 rbuf[5] = 1 << 6; /* TPWS */ 2127 2128 return 0; 2129 } 2130 2131 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2132 { 2133 /* 2134 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2135 */ 2136 rbuf[1] = 0xb6; 2137 rbuf[3] = 0x3C; 2138 2139 /* 2140 * URSWRZ bit is only meaningful for host-managed ZAC drives 2141 */ 2142 if (args->dev->zac_zoned_cap & 1) 2143 rbuf[4] |= 1; 2144 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2145 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2146 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2147 2148 return 0; 2149 } 2150 2151 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2152 { 2153 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2154 u8 *desc = &rbuf[64]; 2155 int i; 2156 2157 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2158 rbuf[1] = 0xb9; 2159 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2160 2161 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2162 desc[0] = cpr_log->cpr[i].num; 2163 desc[1] = cpr_log->cpr[i].num_storage_elements; 2164 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2165 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2166 } 2167 2168 return 0; 2169 } 2170 2171 /** 2172 * modecpy - Prepare response for MODE SENSE 2173 * @dest: output buffer 2174 * @src: data being copied 2175 * @n: length of mode page 2176 * @changeable: whether changeable parameters are requested 2177 * 2178 * Generate a generic MODE SENSE page for either current or changeable 2179 * parameters. 2180 * 2181 * LOCKING: 2182 * None. 2183 */ 2184 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2185 { 2186 if (changeable) { 2187 memcpy(dest, src, 2); 2188 memset(dest + 2, 0, n - 2); 2189 } else { 2190 memcpy(dest, src, n); 2191 } 2192 } 2193 2194 /** 2195 * ata_msense_caching - Simulate MODE SENSE caching info page 2196 * @id: device IDENTIFY data 2197 * @buf: output buffer 2198 * @changeable: whether changeable parameters are requested 2199 * 2200 * Generate a caching info page, which conditionally indicates 2201 * write caching to the SCSI layer, depending on device 2202 * capabilities. 2203 * 2204 * LOCKING: 2205 * None. 2206 */ 2207 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2208 { 2209 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2210 if (changeable) { 2211 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2212 } else { 2213 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2214 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2215 } 2216 return sizeof(def_cache_mpage); 2217 } 2218 2219 /* 2220 * Simulate MODE SENSE control mode page, sub-page 0. 2221 */ 2222 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2223 bool changeable) 2224 { 2225 modecpy(buf, def_control_mpage, 2226 sizeof(def_control_mpage), changeable); 2227 if (changeable) { 2228 /* ata_mselect_control() */ 2229 buf[2] |= (1 << 2); 2230 } else { 2231 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2232 2233 /* descriptor format sense data */ 2234 buf[2] |= (d_sense << 2); 2235 } 2236 2237 return sizeof(def_control_mpage); 2238 } 2239 2240 /* 2241 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2242 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2243 * only, take care of overflows. 2244 */ 2245 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2246 { 2247 u32 limit = get_unaligned_le32(buf); 2248 2249 return min_t(u32, limit / 10000, 65535); 2250 } 2251 2252 /* 2253 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2254 * (command duration limits T2A and T2B mode pages). 2255 */ 2256 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2257 u8 spg) 2258 { 2259 u8 *b, *cdl, *desc; 2260 u32 policy; 2261 int i; 2262 2263 if (!(dev->flags & ATA_DFLAG_CDL) || !dev->cdl) 2264 return 0; 2265 2266 cdl = dev->cdl->desc_log_buf; 2267 2268 /* 2269 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2270 * are a header. The PAGE LENGTH field is the size of the page 2271 * excluding the header. 2272 */ 2273 buf[0] = CONTROL_MPAGE; 2274 buf[1] = spg; 2275 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2276 if (spg == CDL_T2A_SUB_MPAGE) { 2277 /* 2278 * Read descriptors map to the T2A page: 2279 * set perf_vs_duration_guidleine. 2280 */ 2281 buf[7] = (cdl[0] & 0x03) << 4; 2282 desc = cdl + 64; 2283 } else { 2284 /* Write descriptors map to the T2B page */ 2285 desc = cdl + 288; 2286 } 2287 2288 /* Fill the T2 page descriptors */ 2289 b = &buf[8]; 2290 policy = get_unaligned_le32(&cdl[0]); 2291 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2292 /* t2cdlunits: fixed to 10ms */ 2293 b[0] = 0x0a; 2294 2295 /* Max inactive time and its policy */ 2296 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2297 b[6] = ((policy >> 8) & 0x0f) << 4; 2298 2299 /* Max active time and its policy */ 2300 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2301 b[6] |= (policy >> 4) & 0x0f; 2302 2303 /* Command duration guideline and its policy */ 2304 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2305 b[14] = policy & 0x0f; 2306 } 2307 2308 return CDL_T2_SUB_MPAGE_LEN; 2309 } 2310 2311 /* 2312 * Simulate MODE SENSE control mode page, sub-page f2h 2313 * (ATA feature control mode page). 2314 */ 2315 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2316 u8 *buf) 2317 { 2318 /* PS=0, SPF=1 */ 2319 buf[0] = CONTROL_MPAGE | (1 << 6); 2320 buf[1] = ATA_FEATURE_SUB_MPAGE; 2321 2322 /* 2323 * The first four bytes of ATA Feature Control mode page are a header. 2324 * The PAGE LENGTH field is the size of the page excluding the header. 2325 */ 2326 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2327 2328 if (dev->flags & ATA_DFLAG_CDL) 2329 buf[4] = 0x02; /* Support T2A and T2B pages */ 2330 else 2331 buf[4] = 0; 2332 2333 return ATA_FEATURE_SUB_MPAGE_LEN; 2334 } 2335 2336 /** 2337 * ata_msense_control - Simulate MODE SENSE control mode page 2338 * @dev: ATA device of interest 2339 * @buf: output buffer 2340 * @spg: sub-page code 2341 * @changeable: whether changeable parameters are requested 2342 * 2343 * Generate a generic MODE SENSE control mode page. 2344 * 2345 * LOCKING: 2346 * None. 2347 */ 2348 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2349 u8 spg, bool changeable) 2350 { 2351 unsigned int n; 2352 2353 switch (spg) { 2354 case 0: 2355 return ata_msense_control_spg0(dev, buf, changeable); 2356 case CDL_T2A_SUB_MPAGE: 2357 case CDL_T2B_SUB_MPAGE: 2358 return ata_msense_control_spgt2(dev, buf, spg); 2359 case ATA_FEATURE_SUB_MPAGE: 2360 return ata_msense_control_ata_feature(dev, buf); 2361 case ALL_SUB_MPAGES: 2362 n = ata_msense_control_spg0(dev, buf, changeable); 2363 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2364 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2B_SUB_MPAGE); 2365 n += ata_msense_control_ata_feature(dev, buf + n); 2366 return n; 2367 default: 2368 return 0; 2369 } 2370 } 2371 2372 /** 2373 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2374 * @buf: output buffer 2375 * @changeable: whether changeable parameters are requested 2376 * 2377 * Generate a generic MODE SENSE r/w error recovery page. 2378 * 2379 * LOCKING: 2380 * None. 2381 */ 2382 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2383 { 2384 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2385 changeable); 2386 return sizeof(def_rw_recovery_mpage); 2387 } 2388 2389 /** 2390 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2391 * @args: device IDENTIFY data / SCSI command of interest. 2392 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2393 * 2394 * Simulate MODE SENSE commands. Assume this is invoked for direct 2395 * access devices (e.g. disks) only. There should be no block 2396 * descriptor for other device types. 2397 * 2398 * LOCKING: 2399 * spin_lock_irqsave(host lock) 2400 */ 2401 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2402 { 2403 struct ata_device *dev = args->dev; 2404 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2405 static const u8 sat_blk_desc[] = { 2406 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2407 0, 2408 0, 0x2, 0x0 /* block length: 512 bytes */ 2409 }; 2410 u8 pg, spg; 2411 unsigned int ebd, page_control, six_byte; 2412 u8 dpofua = 0, bp = 0xff; 2413 u16 fp; 2414 2415 six_byte = (scsicmd[0] == MODE_SENSE); 2416 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2417 /* 2418 * LLBA bit in msense(10) ignored (compliant) 2419 */ 2420 2421 page_control = scsicmd[2] >> 6; 2422 switch (page_control) { 2423 case 0: /* current */ 2424 case 1: /* changeable */ 2425 case 2: /* defaults */ 2426 break; /* supported */ 2427 case 3: /* saved */ 2428 goto saving_not_supp; 2429 default: 2430 fp = 2; 2431 bp = 6; 2432 goto invalid_fld; 2433 } 2434 2435 if (six_byte) 2436 p += 4 + (ebd ? 8 : 0); 2437 else 2438 p += 8 + (ebd ? 8 : 0); 2439 2440 pg = scsicmd[2] & 0x3f; 2441 spg = scsicmd[3]; 2442 2443 /* 2444 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2445 * the control page. 2446 */ 2447 if (spg) { 2448 switch (spg) { 2449 case ALL_SUB_MPAGES: 2450 break; 2451 case CDL_T2A_SUB_MPAGE: 2452 case CDL_T2B_SUB_MPAGE: 2453 case ATA_FEATURE_SUB_MPAGE: 2454 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2455 break; 2456 fallthrough; 2457 default: 2458 fp = 3; 2459 goto invalid_fld; 2460 } 2461 } 2462 2463 switch(pg) { 2464 case RW_RECOVERY_MPAGE: 2465 p += ata_msense_rw_recovery(p, page_control == 1); 2466 break; 2467 2468 case CACHE_MPAGE: 2469 p += ata_msense_caching(args->id, p, page_control == 1); 2470 break; 2471 2472 case CONTROL_MPAGE: 2473 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2474 break; 2475 2476 case ALL_MPAGES: 2477 p += ata_msense_rw_recovery(p, page_control == 1); 2478 p += ata_msense_caching(args->id, p, page_control == 1); 2479 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2480 break; 2481 2482 default: /* invalid page code */ 2483 fp = 2; 2484 goto invalid_fld; 2485 } 2486 2487 if (dev->flags & ATA_DFLAG_FUA) 2488 dpofua = 1 << 4; 2489 2490 if (six_byte) { 2491 rbuf[0] = p - rbuf - 1; 2492 rbuf[2] |= dpofua; 2493 if (ebd) { 2494 rbuf[3] = sizeof(sat_blk_desc); 2495 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2496 } 2497 } else { 2498 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2499 rbuf[3] |= dpofua; 2500 if (ebd) { 2501 rbuf[7] = sizeof(sat_blk_desc); 2502 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2503 } 2504 } 2505 return 0; 2506 2507 invalid_fld: 2508 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2509 return 1; 2510 2511 saving_not_supp: 2512 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2513 /* "Saving parameters not supported" */ 2514 return 1; 2515 } 2516 2517 /** 2518 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2519 * @args: device IDENTIFY data / SCSI command of interest. 2520 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2521 * 2522 * Simulate READ CAPACITY commands. 2523 * 2524 * LOCKING: 2525 * None. 2526 */ 2527 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2528 { 2529 struct ata_device *dev = args->dev; 2530 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2531 u32 sector_size; /* physical sector size in bytes */ 2532 u8 log2_per_phys; 2533 u16 lowest_aligned; 2534 2535 sector_size = ata_id_logical_sector_size(dev->id); 2536 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2537 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2538 2539 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2540 if (last_lba >= 0xffffffffULL) 2541 last_lba = 0xffffffff; 2542 2543 /* sector count, 32-bit */ 2544 rbuf[0] = last_lba >> (8 * 3); 2545 rbuf[1] = last_lba >> (8 * 2); 2546 rbuf[2] = last_lba >> (8 * 1); 2547 rbuf[3] = last_lba; 2548 2549 /* sector size */ 2550 rbuf[4] = sector_size >> (8 * 3); 2551 rbuf[5] = sector_size >> (8 * 2); 2552 rbuf[6] = sector_size >> (8 * 1); 2553 rbuf[7] = sector_size; 2554 } else { 2555 /* sector count, 64-bit */ 2556 rbuf[0] = last_lba >> (8 * 7); 2557 rbuf[1] = last_lba >> (8 * 6); 2558 rbuf[2] = last_lba >> (8 * 5); 2559 rbuf[3] = last_lba >> (8 * 4); 2560 rbuf[4] = last_lba >> (8 * 3); 2561 rbuf[5] = last_lba >> (8 * 2); 2562 rbuf[6] = last_lba >> (8 * 1); 2563 rbuf[7] = last_lba; 2564 2565 /* sector size */ 2566 rbuf[ 8] = sector_size >> (8 * 3); 2567 rbuf[ 9] = sector_size >> (8 * 2); 2568 rbuf[10] = sector_size >> (8 * 1); 2569 rbuf[11] = sector_size; 2570 2571 rbuf[12] = 0; 2572 rbuf[13] = log2_per_phys; 2573 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2574 rbuf[15] = lowest_aligned; 2575 2576 if (ata_id_has_trim(args->id) && 2577 !(dev->quirks & ATA_QUIRK_NOTRIM)) { 2578 rbuf[14] |= 0x80; /* LBPME */ 2579 2580 if (ata_id_has_zero_after_trim(args->id) && 2581 dev->quirks & ATA_QUIRK_ZERO_AFTER_TRIM) { 2582 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2583 rbuf[14] |= 0x40; /* LBPRZ */ 2584 } 2585 } 2586 if (ata_id_zoned_cap(args->id) || 2587 args->dev->class == ATA_DEV_ZAC) 2588 rbuf[12] = (1 << 4); /* RC_BASIS */ 2589 } 2590 return 0; 2591 } 2592 2593 /** 2594 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2595 * @args: device IDENTIFY data / SCSI command of interest. 2596 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2597 * 2598 * Simulate REPORT LUNS command. 2599 * 2600 * LOCKING: 2601 * spin_lock_irqsave(host lock) 2602 */ 2603 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2604 { 2605 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2606 2607 return 0; 2608 } 2609 2610 /* 2611 * ATAPI devices typically report zero for their SCSI version, and sometimes 2612 * deviate from the spec WRT response data format. If SCSI version is 2613 * reported as zero like normal, then we make the following fixups: 2614 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2615 * modern device. 2616 * 2) Ensure response data format / ATAPI information are always correct. 2617 */ 2618 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2619 { 2620 u8 buf[4]; 2621 2622 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2623 if (buf[2] == 0) { 2624 buf[2] = 0x5; 2625 buf[3] = 0x32; 2626 } 2627 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2628 } 2629 2630 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2631 { 2632 struct scsi_cmnd *cmd = qc->scsicmd; 2633 unsigned int err_mask = qc->err_mask; 2634 2635 /* handle completion from EH */ 2636 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2637 2638 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2639 ata_gen_passthru_sense(qc); 2640 2641 /* SCSI EH automatically locks door if sdev->locked is 2642 * set. Sometimes door lock request continues to 2643 * fail, for example, when no media is present. This 2644 * creates a loop - SCSI EH issues door lock which 2645 * fails and gets invoked again to acquire sense data 2646 * for the failed command. 2647 * 2648 * If door lock fails, always clear sdev->locked to 2649 * avoid this infinite loop. 2650 * 2651 * This may happen before SCSI scan is complete. Make 2652 * sure qc->dev->sdev isn't NULL before dereferencing. 2653 */ 2654 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2655 qc->dev->sdev->locked = 0; 2656 2657 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2658 ata_qc_done(qc); 2659 return; 2660 } 2661 2662 /* successful completion path */ 2663 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2664 atapi_fixup_inquiry(cmd); 2665 cmd->result = SAM_STAT_GOOD; 2666 2667 ata_qc_done(qc); 2668 } 2669 /** 2670 * atapi_xlat - Initialize PACKET taskfile 2671 * @qc: command structure to be initialized 2672 * 2673 * LOCKING: 2674 * spin_lock_irqsave(host lock) 2675 * 2676 * RETURNS: 2677 * Zero on success, non-zero on failure. 2678 */ 2679 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2680 { 2681 struct scsi_cmnd *scmd = qc->scsicmd; 2682 struct ata_device *dev = qc->dev; 2683 int nodata = (scmd->sc_data_direction == DMA_NONE); 2684 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2685 unsigned int nbytes; 2686 2687 memset(qc->cdb, 0, dev->cdb_len); 2688 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2689 2690 qc->complete_fn = atapi_qc_complete; 2691 2692 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2693 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2694 qc->tf.flags |= ATA_TFLAG_WRITE; 2695 } 2696 2697 qc->tf.command = ATA_CMD_PACKET; 2698 ata_qc_set_pc_nbytes(qc); 2699 2700 /* check whether ATAPI DMA is safe */ 2701 if (!nodata && !using_pio && atapi_check_dma(qc)) 2702 using_pio = 1; 2703 2704 /* Some controller variants snoop this value for Packet 2705 * transfers to do state machine and FIFO management. Thus we 2706 * want to set it properly, and for DMA where it is 2707 * effectively meaningless. 2708 */ 2709 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2710 2711 /* Most ATAPI devices which honor transfer chunk size don't 2712 * behave according to the spec when odd chunk size which 2713 * matches the transfer length is specified. If the number of 2714 * bytes to transfer is 2n+1. According to the spec, what 2715 * should happen is to indicate that 2n+1 is going to be 2716 * transferred and transfer 2n+2 bytes where the last byte is 2717 * padding. 2718 * 2719 * In practice, this doesn't happen. ATAPI devices first 2720 * indicate and transfer 2n bytes and then indicate and 2721 * transfer 2 bytes where the last byte is padding. 2722 * 2723 * This inconsistency confuses several controllers which 2724 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2725 * These controllers use actual number of transferred bytes to 2726 * update DMA pointer and transfer of 4n+2 bytes make those 2727 * controller push DMA pointer by 4n+4 bytes because SATA data 2728 * FISes are aligned to 4 bytes. This causes data corruption 2729 * and buffer overrun. 2730 * 2731 * Always setting nbytes to even number solves this problem 2732 * because then ATAPI devices don't have to split data at 2n 2733 * boundaries. 2734 */ 2735 if (nbytes & 0x1) 2736 nbytes++; 2737 2738 qc->tf.lbam = (nbytes & 0xFF); 2739 qc->tf.lbah = (nbytes >> 8); 2740 2741 if (nodata) 2742 qc->tf.protocol = ATAPI_PROT_NODATA; 2743 else if (using_pio) 2744 qc->tf.protocol = ATAPI_PROT_PIO; 2745 else { 2746 /* DMA data xfer */ 2747 qc->tf.protocol = ATAPI_PROT_DMA; 2748 qc->tf.feature |= ATAPI_PKT_DMA; 2749 2750 if ((dev->flags & ATA_DFLAG_DMADIR) && 2751 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2752 /* some SATA bridges need us to indicate data xfer direction */ 2753 qc->tf.feature |= ATAPI_DMADIR; 2754 } 2755 2756 2757 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2758 as ATAPI tape drives don't get this right otherwise */ 2759 return 0; 2760 } 2761 2762 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 2763 { 2764 /* 2765 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 2766 * or 2 (IDE master + slave case). However, the former case includes 2767 * libsas hosted devices which are numbered per scsi host, leading 2768 * to devno potentially being larger than 0 but with each struct 2769 * ata_device having its own struct ata_port and struct ata_link. 2770 * To accommodate these, ignore devno and always use device number 0. 2771 */ 2772 if (likely(!sata_pmp_attached(ap))) { 2773 int link_max_devices = ata_link_max_devices(&ap->link); 2774 2775 if (link_max_devices == 1) 2776 return &ap->link.device[0]; 2777 2778 if (devno < link_max_devices) 2779 return &ap->link.device[devno]; 2780 2781 return NULL; 2782 } 2783 2784 /* 2785 * For PMP-attached devices, the device number corresponds to C 2786 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 2787 * for the device. 2788 */ 2789 if (devno < ap->nr_pmp_links) 2790 return &ap->pmp_link[devno].device[0]; 2791 2792 return NULL; 2793 } 2794 2795 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2796 const struct scsi_device *scsidev) 2797 { 2798 int devno; 2799 2800 /* skip commands not addressed to targets we simulate */ 2801 if (!sata_pmp_attached(ap)) { 2802 if (unlikely(scsidev->channel || scsidev->lun)) 2803 return NULL; 2804 devno = scsidev->id; 2805 } else { 2806 if (unlikely(scsidev->id || scsidev->lun)) 2807 return NULL; 2808 devno = scsidev->channel; 2809 } 2810 2811 return ata_find_dev(ap, devno); 2812 } 2813 2814 /** 2815 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2816 * @ap: ATA port to which the device is attached 2817 * @scsidev: SCSI device from which we derive the ATA device 2818 * 2819 * Given various information provided in struct scsi_cmnd, 2820 * map that onto an ATA bus, and using that mapping 2821 * determine which ata_device is associated with the 2822 * SCSI command to be sent. 2823 * 2824 * LOCKING: 2825 * spin_lock_irqsave(host lock) 2826 * 2827 * RETURNS: 2828 * Associated ATA device, or %NULL if not found. 2829 */ 2830 struct ata_device * 2831 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2832 { 2833 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2834 2835 if (unlikely(!dev || !ata_dev_enabled(dev))) 2836 return NULL; 2837 2838 return dev; 2839 } 2840 2841 /* 2842 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2843 * @byte1: Byte 1 from pass-thru CDB. 2844 * 2845 * RETURNS: 2846 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2847 */ 2848 static u8 2849 ata_scsi_map_proto(u8 byte1) 2850 { 2851 switch((byte1 & 0x1e) >> 1) { 2852 case 3: /* Non-data */ 2853 return ATA_PROT_NODATA; 2854 2855 case 6: /* DMA */ 2856 case 10: /* UDMA Data-in */ 2857 case 11: /* UDMA Data-Out */ 2858 return ATA_PROT_DMA; 2859 2860 case 4: /* PIO Data-in */ 2861 case 5: /* PIO Data-out */ 2862 return ATA_PROT_PIO; 2863 2864 case 12: /* FPDMA */ 2865 return ATA_PROT_NCQ; 2866 2867 case 0: /* Hard Reset */ 2868 case 1: /* SRST */ 2869 case 8: /* Device Diagnostic */ 2870 case 9: /* Device Reset */ 2871 case 7: /* DMA Queued */ 2872 case 15: /* Return Response Info */ 2873 default: /* Reserved */ 2874 break; 2875 } 2876 2877 return ATA_PROT_UNKNOWN; 2878 } 2879 2880 /** 2881 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2882 * @qc: command structure to be initialized 2883 * 2884 * Handles either 12, 16, or 32-byte versions of the CDB. 2885 * 2886 * RETURNS: 2887 * Zero on success, non-zero on failure. 2888 */ 2889 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2890 { 2891 struct ata_taskfile *tf = &(qc->tf); 2892 struct scsi_cmnd *scmd = qc->scsicmd; 2893 struct ata_device *dev = qc->dev; 2894 const u8 *cdb = scmd->cmnd; 2895 u16 fp; 2896 u16 cdb_offset = 0; 2897 2898 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2899 if (cdb[0] == VARIABLE_LENGTH_CMD) 2900 cdb_offset = 9; 2901 2902 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2903 if (tf->protocol == ATA_PROT_UNKNOWN) { 2904 fp = 1; 2905 goto invalid_fld; 2906 } 2907 2908 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 2909 /* 2910 * When T_LENGTH is zero (No data is transferred), dir should 2911 * be DMA_NONE. 2912 */ 2913 if (scmd->sc_data_direction != DMA_NONE) { 2914 fp = 2 + cdb_offset; 2915 goto invalid_fld; 2916 } 2917 2918 if (ata_is_ncq(tf->protocol)) 2919 tf->protocol = ATA_PROT_NCQ_NODATA; 2920 } 2921 2922 /* enable LBA */ 2923 tf->flags |= ATA_TFLAG_LBA; 2924 2925 /* 2926 * 12 and 16 byte CDBs use different offsets to 2927 * provide the various register values. 2928 */ 2929 switch (cdb[0]) { 2930 case ATA_16: 2931 /* 2932 * 16-byte CDB - may contain extended commands. 2933 * 2934 * If that is the case, copy the upper byte register values. 2935 */ 2936 if (cdb[1] & 0x01) { 2937 tf->hob_feature = cdb[3]; 2938 tf->hob_nsect = cdb[5]; 2939 tf->hob_lbal = cdb[7]; 2940 tf->hob_lbam = cdb[9]; 2941 tf->hob_lbah = cdb[11]; 2942 tf->flags |= ATA_TFLAG_LBA48; 2943 } else 2944 tf->flags &= ~ATA_TFLAG_LBA48; 2945 2946 /* 2947 * Always copy low byte, device and command registers. 2948 */ 2949 tf->feature = cdb[4]; 2950 tf->nsect = cdb[6]; 2951 tf->lbal = cdb[8]; 2952 tf->lbam = cdb[10]; 2953 tf->lbah = cdb[12]; 2954 tf->device = cdb[13]; 2955 tf->command = cdb[14]; 2956 break; 2957 case ATA_12: 2958 /* 2959 * 12-byte CDB - incapable of extended commands. 2960 */ 2961 tf->flags &= ~ATA_TFLAG_LBA48; 2962 2963 tf->feature = cdb[3]; 2964 tf->nsect = cdb[4]; 2965 tf->lbal = cdb[5]; 2966 tf->lbam = cdb[6]; 2967 tf->lbah = cdb[7]; 2968 tf->device = cdb[8]; 2969 tf->command = cdb[9]; 2970 break; 2971 default: 2972 /* 2973 * 32-byte CDB - may contain extended command fields. 2974 * 2975 * If that is the case, copy the upper byte register values. 2976 */ 2977 if (cdb[10] & 0x01) { 2978 tf->hob_feature = cdb[20]; 2979 tf->hob_nsect = cdb[22]; 2980 tf->hob_lbal = cdb[16]; 2981 tf->hob_lbam = cdb[15]; 2982 tf->hob_lbah = cdb[14]; 2983 tf->flags |= ATA_TFLAG_LBA48; 2984 } else 2985 tf->flags &= ~ATA_TFLAG_LBA48; 2986 2987 tf->feature = cdb[21]; 2988 tf->nsect = cdb[23]; 2989 tf->lbal = cdb[19]; 2990 tf->lbam = cdb[18]; 2991 tf->lbah = cdb[17]; 2992 tf->device = cdb[24]; 2993 tf->command = cdb[25]; 2994 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2995 break; 2996 } 2997 2998 /* For NCQ commands copy the tag value */ 2999 if (ata_is_ncq(tf->protocol)) 3000 tf->nsect = qc->hw_tag << 3; 3001 3002 /* enforce correct master/slave bit */ 3003 tf->device = dev->devno ? 3004 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3005 3006 switch (tf->command) { 3007 /* READ/WRITE LONG use a non-standard sect_size */ 3008 case ATA_CMD_READ_LONG: 3009 case ATA_CMD_READ_LONG_ONCE: 3010 case ATA_CMD_WRITE_LONG: 3011 case ATA_CMD_WRITE_LONG_ONCE: 3012 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3013 fp = 1; 3014 goto invalid_fld; 3015 } 3016 qc->sect_size = scsi_bufflen(scmd); 3017 break; 3018 3019 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3020 case ATA_CMD_CFA_WRITE_NE: 3021 case ATA_CMD_CFA_TRANS_SECT: 3022 case ATA_CMD_CFA_WRITE_MULT_NE: 3023 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3024 case ATA_CMD_READ: 3025 case ATA_CMD_READ_EXT: 3026 case ATA_CMD_READ_QUEUED: 3027 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3028 case ATA_CMD_FPDMA_READ: 3029 case ATA_CMD_READ_MULTI: 3030 case ATA_CMD_READ_MULTI_EXT: 3031 case ATA_CMD_PIO_READ: 3032 case ATA_CMD_PIO_READ_EXT: 3033 case ATA_CMD_READ_STREAM_DMA_EXT: 3034 case ATA_CMD_READ_STREAM_EXT: 3035 case ATA_CMD_VERIFY: 3036 case ATA_CMD_VERIFY_EXT: 3037 case ATA_CMD_WRITE: 3038 case ATA_CMD_WRITE_EXT: 3039 case ATA_CMD_WRITE_FUA_EXT: 3040 case ATA_CMD_WRITE_QUEUED: 3041 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3042 case ATA_CMD_FPDMA_WRITE: 3043 case ATA_CMD_WRITE_MULTI: 3044 case ATA_CMD_WRITE_MULTI_EXT: 3045 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3046 case ATA_CMD_PIO_WRITE: 3047 case ATA_CMD_PIO_WRITE_EXT: 3048 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3049 case ATA_CMD_WRITE_STREAM_EXT: 3050 qc->sect_size = scmd->device->sector_size; 3051 break; 3052 3053 /* Everything else uses 512 byte "sectors" */ 3054 default: 3055 qc->sect_size = ATA_SECT_SIZE; 3056 } 3057 3058 /* 3059 * Set flags so that all registers will be written, pass on 3060 * write indication (used for PIO/DMA setup), result TF is 3061 * copied back and we don't whine too much about its failure. 3062 */ 3063 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3064 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3065 tf->flags |= ATA_TFLAG_WRITE; 3066 3067 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3068 3069 /* 3070 * Set transfer length. 3071 * 3072 * TODO: find out if we need to do more here to 3073 * cover scatter/gather case. 3074 */ 3075 ata_qc_set_pc_nbytes(qc); 3076 3077 /* We may not issue DMA commands if no DMA mode is set */ 3078 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3079 fp = 1; 3080 goto invalid_fld; 3081 } 3082 3083 /* We may not issue NCQ commands to devices not supporting NCQ */ 3084 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3085 fp = 1; 3086 goto invalid_fld; 3087 } 3088 3089 /* sanity check for pio multi commands */ 3090 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3091 fp = 1; 3092 goto invalid_fld; 3093 } 3094 3095 if (is_multi_taskfile(tf)) { 3096 unsigned int multi_count = 1 << (cdb[1] >> 5); 3097 3098 /* compare the passed through multi_count 3099 * with the cached multi_count of libata 3100 */ 3101 if (multi_count != dev->multi_count) 3102 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3103 multi_count); 3104 } 3105 3106 /* 3107 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3108 * SET_FEATURES - XFER MODE must be preceded/succeeded 3109 * by an update to hardware-specific registers for each 3110 * controller (i.e. the reason for ->set_piomode(), 3111 * ->set_dmamode(), and ->post_set_mode() hooks). 3112 */ 3113 if (tf->command == ATA_CMD_SET_FEATURES && 3114 tf->feature == SETFEATURES_XFER) { 3115 fp = (cdb[0] == ATA_16) ? 4 : 3; 3116 goto invalid_fld; 3117 } 3118 3119 /* 3120 * Filter TPM commands by default. These provide an 3121 * essentially uncontrolled encrypted "back door" between 3122 * applications and the disk. Set libata.allow_tpm=1 if you 3123 * have a real reason for wanting to use them. This ensures 3124 * that installed software cannot easily mess stuff up without 3125 * user intent. DVR type users will probably ship with this enabled 3126 * for movie content management. 3127 * 3128 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3129 * for this and should do in future but that it is not sufficient as 3130 * DCS is an optional feature set. Thus we also do the software filter 3131 * so that we comply with the TC consortium stated goal that the user 3132 * can turn off TC features of their system. 3133 */ 3134 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3135 fp = (cdb[0] == ATA_16) ? 14 : 9; 3136 goto invalid_fld; 3137 } 3138 3139 return 0; 3140 3141 invalid_fld: 3142 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3143 return 1; 3144 } 3145 3146 /** 3147 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3148 * @cmd: SCSI command being translated 3149 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3150 * @sector: Starting sector 3151 * @count: Total Range of request in logical sectors 3152 * 3153 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3154 * descriptor. 3155 * 3156 * Upto 64 entries of the format: 3157 * 63:48 Range Length 3158 * 47:0 LBA 3159 * 3160 * Range Length of 0 is ignored. 3161 * LBA's should be sorted order and not overlap. 3162 * 3163 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3164 * 3165 * Return: Number of bytes copied into sglist. 3166 */ 3167 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3168 u64 sector, u32 count) 3169 { 3170 struct scsi_device *sdp = cmd->device; 3171 size_t len = sdp->sector_size; 3172 size_t r; 3173 __le64 *buf; 3174 u32 i = 0; 3175 unsigned long flags; 3176 3177 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3178 3179 if (len > ATA_SCSI_RBUF_SIZE) 3180 len = ATA_SCSI_RBUF_SIZE; 3181 3182 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3183 buf = ((void *)ata_scsi_rbuf); 3184 memset(buf, 0, len); 3185 while (i < trmax) { 3186 u64 entry = sector | 3187 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3188 buf[i++] = __cpu_to_le64(entry); 3189 if (count <= 0xffff) 3190 break; 3191 count -= 0xffff; 3192 sector += 0xffff; 3193 } 3194 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3195 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3196 3197 return r; 3198 } 3199 3200 /** 3201 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3202 * @qc: Command to be translated 3203 * 3204 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3205 * an SCT Write Same command. 3206 * Based on WRITE SAME has the UNMAP flag: 3207 * 3208 * - When set translate to DSM TRIM 3209 * - When clear translate to SCT Write Same 3210 */ 3211 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3212 { 3213 struct ata_taskfile *tf = &qc->tf; 3214 struct scsi_cmnd *scmd = qc->scsicmd; 3215 struct scsi_device *sdp = scmd->device; 3216 size_t len = sdp->sector_size; 3217 struct ata_device *dev = qc->dev; 3218 const u8 *cdb = scmd->cmnd; 3219 u64 block; 3220 u32 n_block; 3221 const u32 trmax = len >> 3; 3222 u32 size; 3223 u16 fp; 3224 u8 bp = 0xff; 3225 u8 unmap = cdb[1] & 0x8; 3226 3227 /* we may not issue DMA commands if no DMA mode is set */ 3228 if (unlikely(!ata_dma_enabled(dev))) 3229 goto invalid_opcode; 3230 3231 /* 3232 * We only allow sending this command through the block layer, 3233 * as it modifies the DATA OUT buffer, which would corrupt user 3234 * memory for SG_IO commands. 3235 */ 3236 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3237 goto invalid_opcode; 3238 3239 if (unlikely(scmd->cmd_len < 16)) { 3240 fp = 15; 3241 goto invalid_fld; 3242 } 3243 scsi_16_lba_len(cdb, &block, &n_block); 3244 3245 if (!unmap || (dev->quirks & ATA_QUIRK_NOTRIM) || 3246 !ata_id_has_trim(dev->id)) { 3247 fp = 1; 3248 bp = 3; 3249 goto invalid_fld; 3250 } 3251 /* If the request is too large the cmd is invalid */ 3252 if (n_block > 0xffff * trmax) { 3253 fp = 2; 3254 goto invalid_fld; 3255 } 3256 3257 /* 3258 * WRITE SAME always has a sector sized buffer as payload, this 3259 * should never be a multiple entry S/G list. 3260 */ 3261 if (!scsi_sg_count(scmd)) 3262 goto invalid_param_len; 3263 3264 /* 3265 * size must match sector size in bytes 3266 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3267 * is defined as number of 512 byte blocks to be transferred. 3268 */ 3269 3270 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3271 if (size != len) 3272 goto invalid_param_len; 3273 3274 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3275 /* Newer devices support queued TRIM commands */ 3276 tf->protocol = ATA_PROT_NCQ; 3277 tf->command = ATA_CMD_FPDMA_SEND; 3278 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3279 tf->nsect = qc->hw_tag << 3; 3280 tf->hob_feature = (size / 512) >> 8; 3281 tf->feature = size / 512; 3282 3283 tf->auxiliary = 1; 3284 } else { 3285 tf->protocol = ATA_PROT_DMA; 3286 tf->hob_feature = 0; 3287 tf->feature = ATA_DSM_TRIM; 3288 tf->hob_nsect = (size / 512) >> 8; 3289 tf->nsect = size / 512; 3290 tf->command = ATA_CMD_DSM; 3291 } 3292 3293 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3294 ATA_TFLAG_WRITE; 3295 3296 ata_qc_set_pc_nbytes(qc); 3297 3298 return 0; 3299 3300 invalid_fld: 3301 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3302 return 1; 3303 invalid_param_len: 3304 /* "Parameter list length error" */ 3305 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3306 return 1; 3307 invalid_opcode: 3308 /* "Invalid command operation code" */ 3309 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3310 return 1; 3311 } 3312 3313 /** 3314 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3315 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3316 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3317 * 3318 * Yields a subset to satisfy scsi_report_opcode() 3319 * 3320 * LOCKING: 3321 * spin_lock_irqsave(host lock) 3322 */ 3323 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3324 { 3325 struct ata_device *dev = args->dev; 3326 u8 *cdb = args->cmd->cmnd; 3327 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3328 unsigned int err = 0; 3329 3330 if (cdb[2] != 1 && cdb[2] != 3) { 3331 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3332 err = 2; 3333 goto out; 3334 } 3335 3336 switch (cdb[3]) { 3337 case INQUIRY: 3338 case MODE_SENSE: 3339 case MODE_SENSE_10: 3340 case READ_CAPACITY: 3341 case SERVICE_ACTION_IN_16: 3342 case REPORT_LUNS: 3343 case REQUEST_SENSE: 3344 case SYNCHRONIZE_CACHE: 3345 case SYNCHRONIZE_CACHE_16: 3346 case REZERO_UNIT: 3347 case SEEK_6: 3348 case SEEK_10: 3349 case TEST_UNIT_READY: 3350 case SEND_DIAGNOSTIC: 3351 case MAINTENANCE_IN: 3352 case READ_6: 3353 case READ_10: 3354 case WRITE_6: 3355 case WRITE_10: 3356 case ATA_12: 3357 case ATA_16: 3358 case VERIFY: 3359 case VERIFY_16: 3360 case MODE_SELECT: 3361 case MODE_SELECT_10: 3362 case START_STOP: 3363 supported = 3; 3364 break; 3365 case READ_16: 3366 supported = 3; 3367 if (dev->flags & ATA_DFLAG_CDL) { 3368 /* 3369 * CDL read descriptors map to the T2A page, that is, 3370 * rwcdlp = 0x01 and cdlp = 0x01 3371 */ 3372 rwcdlp = 0x01; 3373 cdlp = 0x01 << 3; 3374 } 3375 break; 3376 case WRITE_16: 3377 supported = 3; 3378 if (dev->flags & ATA_DFLAG_CDL) { 3379 /* 3380 * CDL write descriptors map to the T2B page, that is, 3381 * rwcdlp = 0x01 and cdlp = 0x02 3382 */ 3383 rwcdlp = 0x01; 3384 cdlp = 0x02 << 3; 3385 } 3386 break; 3387 case ZBC_IN: 3388 case ZBC_OUT: 3389 if (ata_id_zoned_cap(dev->id) || 3390 dev->class == ATA_DEV_ZAC) 3391 supported = 3; 3392 break; 3393 case SECURITY_PROTOCOL_IN: 3394 case SECURITY_PROTOCOL_OUT: 3395 if (dev->flags & ATA_DFLAG_TRUSTED) 3396 supported = 3; 3397 break; 3398 default: 3399 break; 3400 } 3401 out: 3402 /* One command format */ 3403 rbuf[0] = rwcdlp; 3404 rbuf[1] = cdlp | supported; 3405 return err; 3406 } 3407 3408 /** 3409 * ata_scsi_report_zones_complete - convert ATA output 3410 * @qc: command structure returning the data 3411 * 3412 * Convert T-13 little-endian field representation into 3413 * T-10 big-endian field representation. 3414 * What a mess. 3415 */ 3416 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3417 { 3418 struct scsi_cmnd *scmd = qc->scsicmd; 3419 struct sg_mapping_iter miter; 3420 unsigned long flags; 3421 unsigned int bytes = 0; 3422 3423 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3424 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3425 3426 local_irq_save(flags); 3427 while (sg_miter_next(&miter)) { 3428 unsigned int offset = 0; 3429 3430 if (bytes == 0) { 3431 char *hdr; 3432 u32 list_length; 3433 u64 max_lba, opt_lba; 3434 u16 same; 3435 3436 /* Swizzle header */ 3437 hdr = miter.addr; 3438 list_length = get_unaligned_le32(&hdr[0]); 3439 same = get_unaligned_le16(&hdr[4]); 3440 max_lba = get_unaligned_le64(&hdr[8]); 3441 opt_lba = get_unaligned_le64(&hdr[16]); 3442 put_unaligned_be32(list_length, &hdr[0]); 3443 hdr[4] = same & 0xf; 3444 put_unaligned_be64(max_lba, &hdr[8]); 3445 put_unaligned_be64(opt_lba, &hdr[16]); 3446 offset += 64; 3447 bytes += 64; 3448 } 3449 while (offset < miter.length) { 3450 char *rec; 3451 u8 cond, type, non_seq, reset; 3452 u64 size, start, wp; 3453 3454 /* Swizzle zone descriptor */ 3455 rec = miter.addr + offset; 3456 type = rec[0] & 0xf; 3457 cond = (rec[1] >> 4) & 0xf; 3458 non_seq = (rec[1] & 2); 3459 reset = (rec[1] & 1); 3460 size = get_unaligned_le64(&rec[8]); 3461 start = get_unaligned_le64(&rec[16]); 3462 wp = get_unaligned_le64(&rec[24]); 3463 rec[0] = type; 3464 rec[1] = (cond << 4) | non_seq | reset; 3465 put_unaligned_be64(size, &rec[8]); 3466 put_unaligned_be64(start, &rec[16]); 3467 put_unaligned_be64(wp, &rec[24]); 3468 WARN_ON(offset + 64 > miter.length); 3469 offset += 64; 3470 bytes += 64; 3471 } 3472 } 3473 sg_miter_stop(&miter); 3474 local_irq_restore(flags); 3475 3476 ata_scsi_qc_complete(qc); 3477 } 3478 3479 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3480 { 3481 struct ata_taskfile *tf = &qc->tf; 3482 struct scsi_cmnd *scmd = qc->scsicmd; 3483 const u8 *cdb = scmd->cmnd; 3484 u16 sect, fp = (u16)-1; 3485 u8 sa, options, bp = 0xff; 3486 u64 block; 3487 u32 n_block; 3488 3489 if (unlikely(scmd->cmd_len < 16)) { 3490 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3491 scmd->cmd_len); 3492 fp = 15; 3493 goto invalid_fld; 3494 } 3495 scsi_16_lba_len(cdb, &block, &n_block); 3496 if (n_block != scsi_bufflen(scmd)) { 3497 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3498 n_block, scsi_bufflen(scmd)); 3499 goto invalid_param_len; 3500 } 3501 sa = cdb[1] & 0x1f; 3502 if (sa != ZI_REPORT_ZONES) { 3503 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3504 fp = 1; 3505 goto invalid_fld; 3506 } 3507 /* 3508 * ZAC allows only for transfers in 512 byte blocks, 3509 * and uses a 16 bit value for the transfer count. 3510 */ 3511 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3512 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3513 goto invalid_param_len; 3514 } 3515 sect = n_block / 512; 3516 options = cdb[14] & 0xbf; 3517 3518 if (ata_ncq_enabled(qc->dev) && 3519 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3520 tf->protocol = ATA_PROT_NCQ; 3521 tf->command = ATA_CMD_FPDMA_RECV; 3522 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3523 tf->nsect = qc->hw_tag << 3; 3524 tf->feature = sect & 0xff; 3525 tf->hob_feature = (sect >> 8) & 0xff; 3526 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3527 } else { 3528 tf->command = ATA_CMD_ZAC_MGMT_IN; 3529 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3530 tf->protocol = ATA_PROT_DMA; 3531 tf->hob_feature = options; 3532 tf->hob_nsect = (sect >> 8) & 0xff; 3533 tf->nsect = sect & 0xff; 3534 } 3535 tf->device = ATA_LBA; 3536 tf->lbah = (block >> 16) & 0xff; 3537 tf->lbam = (block >> 8) & 0xff; 3538 tf->lbal = block & 0xff; 3539 tf->hob_lbah = (block >> 40) & 0xff; 3540 tf->hob_lbam = (block >> 32) & 0xff; 3541 tf->hob_lbal = (block >> 24) & 0xff; 3542 3543 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3544 qc->flags |= ATA_QCFLAG_RESULT_TF; 3545 3546 ata_qc_set_pc_nbytes(qc); 3547 3548 qc->complete_fn = ata_scsi_report_zones_complete; 3549 3550 return 0; 3551 3552 invalid_fld: 3553 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3554 return 1; 3555 3556 invalid_param_len: 3557 /* "Parameter list length error" */ 3558 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3559 return 1; 3560 } 3561 3562 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3563 { 3564 struct ata_taskfile *tf = &qc->tf; 3565 struct scsi_cmnd *scmd = qc->scsicmd; 3566 struct ata_device *dev = qc->dev; 3567 const u8 *cdb = scmd->cmnd; 3568 u8 all, sa; 3569 u64 block; 3570 u32 n_block; 3571 u16 fp = (u16)-1; 3572 3573 if (unlikely(scmd->cmd_len < 16)) { 3574 fp = 15; 3575 goto invalid_fld; 3576 } 3577 3578 sa = cdb[1] & 0x1f; 3579 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3580 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3581 fp = 1; 3582 goto invalid_fld; 3583 } 3584 3585 scsi_16_lba_len(cdb, &block, &n_block); 3586 if (n_block) { 3587 /* 3588 * ZAC MANAGEMENT OUT doesn't define any length 3589 */ 3590 goto invalid_param_len; 3591 } 3592 3593 all = cdb[14] & 0x1; 3594 if (all) { 3595 /* 3596 * Ignore the block address (zone ID) as defined by ZBC. 3597 */ 3598 block = 0; 3599 } else if (block >= dev->n_sectors) { 3600 /* 3601 * Block must be a valid zone ID (a zone start LBA). 3602 */ 3603 fp = 2; 3604 goto invalid_fld; 3605 } 3606 3607 if (ata_ncq_enabled(qc->dev) && 3608 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3609 tf->protocol = ATA_PROT_NCQ_NODATA; 3610 tf->command = ATA_CMD_NCQ_NON_DATA; 3611 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3612 tf->nsect = qc->hw_tag << 3; 3613 tf->auxiliary = sa | ((u16)all << 8); 3614 } else { 3615 tf->protocol = ATA_PROT_NODATA; 3616 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3617 tf->feature = sa; 3618 tf->hob_feature = all; 3619 } 3620 tf->lbah = (block >> 16) & 0xff; 3621 tf->lbam = (block >> 8) & 0xff; 3622 tf->lbal = block & 0xff; 3623 tf->hob_lbah = (block >> 40) & 0xff; 3624 tf->hob_lbam = (block >> 32) & 0xff; 3625 tf->hob_lbal = (block >> 24) & 0xff; 3626 tf->device = ATA_LBA; 3627 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3628 3629 return 0; 3630 3631 invalid_fld: 3632 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3633 return 1; 3634 invalid_param_len: 3635 /* "Parameter list length error" */ 3636 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3637 return 1; 3638 } 3639 3640 /** 3641 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3642 * @qc: Storage for translated ATA taskfile 3643 * @buf: input buffer 3644 * @len: number of valid bytes in the input buffer 3645 * @fp: out parameter for the failed field on error 3646 * 3647 * Prepare a taskfile to modify caching information for the device. 3648 * 3649 * LOCKING: 3650 * None. 3651 */ 3652 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3653 const u8 *buf, int len, u16 *fp) 3654 { 3655 struct ata_taskfile *tf = &qc->tf; 3656 struct ata_device *dev = qc->dev; 3657 u8 mpage[CACHE_MPAGE_LEN]; 3658 u8 wce; 3659 int i; 3660 3661 /* 3662 * The first two bytes of def_cache_mpage are a header, so offsets 3663 * in mpage are off by 2 compared to buf. Same for len. 3664 */ 3665 3666 if (len != CACHE_MPAGE_LEN - 2) { 3667 *fp = min(len, CACHE_MPAGE_LEN - 2); 3668 return -EINVAL; 3669 } 3670 3671 wce = buf[0] & (1 << 2); 3672 3673 /* 3674 * Check that read-only bits are not modified. 3675 */ 3676 ata_msense_caching(dev->id, mpage, false); 3677 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3678 if (i == 0) 3679 continue; 3680 if (mpage[i + 2] != buf[i]) { 3681 *fp = i; 3682 return -EINVAL; 3683 } 3684 } 3685 3686 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3687 tf->protocol = ATA_PROT_NODATA; 3688 tf->nsect = 0; 3689 tf->command = ATA_CMD_SET_FEATURES; 3690 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3691 return 0; 3692 } 3693 3694 /* 3695 * Simulate MODE SELECT control mode page, sub-page 0. 3696 */ 3697 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3698 const u8 *buf, int len, u16 *fp) 3699 { 3700 struct ata_device *dev = qc->dev; 3701 u8 mpage[CONTROL_MPAGE_LEN]; 3702 u8 d_sense; 3703 int i; 3704 3705 /* 3706 * The first two bytes of def_control_mpage are a header, so offsets 3707 * in mpage are off by 2 compared to buf. Same for len. 3708 */ 3709 3710 if (len != CONTROL_MPAGE_LEN - 2) { 3711 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3712 return -EINVAL; 3713 } 3714 3715 d_sense = buf[0] & (1 << 2); 3716 3717 /* 3718 * Check that read-only bits are not modified. 3719 */ 3720 ata_msense_control_spg0(dev, mpage, false); 3721 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3722 if (i == 0) 3723 continue; 3724 if (mpage[2 + i] != buf[i]) { 3725 *fp = i; 3726 return -EINVAL; 3727 } 3728 } 3729 if (d_sense & (1 << 2)) 3730 dev->flags |= ATA_DFLAG_D_SENSE; 3731 else 3732 dev->flags &= ~ATA_DFLAG_D_SENSE; 3733 return 0; 3734 } 3735 3736 /* 3737 * Translate MODE SELECT control mode page, sub-pages f2h (ATA feature mode 3738 * page) into a SET FEATURES command. 3739 */ 3740 static unsigned int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 3741 const u8 *buf, int len, 3742 u16 *fp) 3743 { 3744 struct ata_device *dev = qc->dev; 3745 struct ata_taskfile *tf = &qc->tf; 3746 u8 cdl_action; 3747 3748 /* 3749 * The first four bytes of ATA Feature Control mode page are a header, 3750 * so offsets in mpage are off by 4 compared to buf. Same for len. 3751 */ 3752 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 3753 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 3754 return -EINVAL; 3755 } 3756 3757 /* Check cdl_ctrl */ 3758 switch (buf[0] & 0x03) { 3759 case 0: 3760 /* Disable CDL */ 3761 cdl_action = 0; 3762 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 3763 break; 3764 case 0x02: 3765 /* Enable CDL T2A/T2B: NCQ priority must be disabled */ 3766 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 3767 ata_dev_err(dev, 3768 "NCQ priority must be disabled to enable CDL\n"); 3769 return -EINVAL; 3770 } 3771 cdl_action = 1; 3772 dev->flags |= ATA_DFLAG_CDL_ENABLED; 3773 break; 3774 default: 3775 *fp = 0; 3776 return -EINVAL; 3777 } 3778 3779 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3780 tf->protocol = ATA_PROT_NODATA; 3781 tf->command = ATA_CMD_SET_FEATURES; 3782 tf->feature = SETFEATURES_CDL; 3783 tf->nsect = cdl_action; 3784 3785 return 1; 3786 } 3787 3788 /** 3789 * ata_mselect_control - Simulate MODE SELECT for control page 3790 * @qc: Storage for translated ATA taskfile 3791 * @spg: target sub-page of the control page 3792 * @buf: input buffer 3793 * @len: number of valid bytes in the input buffer 3794 * @fp: out parameter for the failed field on error 3795 * 3796 * Prepare a taskfile to modify caching information for the device. 3797 * 3798 * LOCKING: 3799 * None. 3800 */ 3801 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 3802 const u8 *buf, int len, u16 *fp) 3803 { 3804 switch (spg) { 3805 case 0: 3806 return ata_mselect_control_spg0(qc, buf, len, fp); 3807 case ATA_FEATURE_SUB_MPAGE: 3808 return ata_mselect_control_ata_feature(qc, buf, len, fp); 3809 default: 3810 return -EINVAL; 3811 } 3812 } 3813 3814 /** 3815 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3816 * @qc: Storage for translated ATA taskfile 3817 * 3818 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3819 * Assume this is invoked for direct access devices (e.g. disks) only. 3820 * There should be no block descriptor for other device types. 3821 * 3822 * LOCKING: 3823 * spin_lock_irqsave(host lock) 3824 */ 3825 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3826 { 3827 struct scsi_cmnd *scmd = qc->scsicmd; 3828 const u8 *cdb = scmd->cmnd; 3829 u8 pg, spg; 3830 unsigned six_byte, pg_len, hdr_len, bd_len; 3831 int len, ret; 3832 u16 fp = (u16)-1; 3833 u8 bp = 0xff; 3834 u8 buffer[64]; 3835 const u8 *p = buffer; 3836 3837 six_byte = (cdb[0] == MODE_SELECT); 3838 if (six_byte) { 3839 if (scmd->cmd_len < 5) { 3840 fp = 4; 3841 goto invalid_fld; 3842 } 3843 3844 len = cdb[4]; 3845 hdr_len = 4; 3846 } else { 3847 if (scmd->cmd_len < 9) { 3848 fp = 8; 3849 goto invalid_fld; 3850 } 3851 3852 len = get_unaligned_be16(&cdb[7]); 3853 hdr_len = 8; 3854 } 3855 3856 /* We only support PF=1, SP=0. */ 3857 if ((cdb[1] & 0x11) != 0x10) { 3858 fp = 1; 3859 bp = (cdb[1] & 0x01) ? 1 : 5; 3860 goto invalid_fld; 3861 } 3862 3863 /* Test early for possible overrun. */ 3864 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3865 goto invalid_param_len; 3866 3867 /* Move past header and block descriptors. */ 3868 if (len < hdr_len) 3869 goto invalid_param_len; 3870 3871 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3872 buffer, sizeof(buffer))) 3873 goto invalid_param_len; 3874 3875 if (six_byte) 3876 bd_len = p[3]; 3877 else 3878 bd_len = get_unaligned_be16(&p[6]); 3879 3880 len -= hdr_len; 3881 p += hdr_len; 3882 if (len < bd_len) 3883 goto invalid_param_len; 3884 if (bd_len != 0 && bd_len != 8) { 3885 fp = (six_byte) ? 3 : 6; 3886 fp += bd_len + hdr_len; 3887 goto invalid_param; 3888 } 3889 3890 len -= bd_len; 3891 p += bd_len; 3892 if (len == 0) 3893 goto skip; 3894 3895 /* Parse both possible formats for the mode page headers. */ 3896 pg = p[0] & 0x3f; 3897 if (p[0] & 0x40) { 3898 if (len < 4) 3899 goto invalid_param_len; 3900 3901 spg = p[1]; 3902 pg_len = get_unaligned_be16(&p[2]); 3903 p += 4; 3904 len -= 4; 3905 } else { 3906 if (len < 2) 3907 goto invalid_param_len; 3908 3909 spg = 0; 3910 pg_len = p[1]; 3911 p += 2; 3912 len -= 2; 3913 } 3914 3915 /* 3916 * Supported subpages: all subpages and ATA feature sub-page f2h of 3917 * the control page. 3918 */ 3919 if (spg) { 3920 switch (spg) { 3921 case ALL_SUB_MPAGES: 3922 /* All subpages is not supported for the control page */ 3923 if (pg == CONTROL_MPAGE) { 3924 fp = (p[0] & 0x40) ? 1 : 0; 3925 fp += hdr_len + bd_len; 3926 goto invalid_param; 3927 } 3928 break; 3929 case ATA_FEATURE_SUB_MPAGE: 3930 if (qc->dev->flags & ATA_DFLAG_CDL && 3931 pg == CONTROL_MPAGE) 3932 break; 3933 fallthrough; 3934 default: 3935 fp = (p[0] & 0x40) ? 1 : 0; 3936 fp += hdr_len + bd_len; 3937 goto invalid_param; 3938 } 3939 } 3940 if (pg_len > len) 3941 goto invalid_param_len; 3942 3943 switch (pg) { 3944 case CACHE_MPAGE: 3945 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3946 fp += hdr_len + bd_len; 3947 goto invalid_param; 3948 } 3949 break; 3950 case CONTROL_MPAGE: 3951 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 3952 if (ret < 0) { 3953 fp += hdr_len + bd_len; 3954 goto invalid_param; 3955 } 3956 if (!ret) 3957 goto skip; /* No ATA command to send */ 3958 break; 3959 default: 3960 /* Invalid page code */ 3961 fp = bd_len + hdr_len; 3962 goto invalid_param; 3963 } 3964 3965 /* 3966 * Only one page has changeable data, so we only support setting one 3967 * page at a time. 3968 */ 3969 if (len > pg_len) 3970 goto invalid_param; 3971 3972 return 0; 3973 3974 invalid_fld: 3975 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3976 return 1; 3977 3978 invalid_param: 3979 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3980 return 1; 3981 3982 invalid_param_len: 3983 /* "Parameter list length error" */ 3984 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3985 return 1; 3986 3987 skip: 3988 scmd->result = SAM_STAT_GOOD; 3989 return 1; 3990 } 3991 3992 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3993 { 3994 if (len == 0) 3995 return ATA_CMD_TRUSTED_NONDATA; 3996 else if (send) 3997 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 3998 else 3999 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4000 } 4001 4002 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4003 { 4004 struct scsi_cmnd *scmd = qc->scsicmd; 4005 const u8 *cdb = scmd->cmnd; 4006 struct ata_taskfile *tf = &qc->tf; 4007 u8 secp = cdb[1]; 4008 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4009 u16 spsp = get_unaligned_be16(&cdb[2]); 4010 u32 len = get_unaligned_be32(&cdb[6]); 4011 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4012 4013 /* 4014 * We don't support the ATA "security" protocol. 4015 */ 4016 if (secp == 0xef) { 4017 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4018 return 1; 4019 } 4020 4021 if (cdb[4] & 7) { /* INC_512 */ 4022 if (len > 0xffff) { 4023 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4024 return 1; 4025 } 4026 } else { 4027 if (len > 0x01fffe00) { 4028 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4029 return 1; 4030 } 4031 4032 /* convert to the sector-based ATA addressing */ 4033 len = (len + 511) / 512; 4034 } 4035 4036 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4037 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4038 if (send) 4039 tf->flags |= ATA_TFLAG_WRITE; 4040 tf->command = ata_scsi_trusted_op(len, send, dma); 4041 tf->feature = secp; 4042 tf->lbam = spsp & 0xff; 4043 tf->lbah = spsp >> 8; 4044 4045 if (len) { 4046 tf->nsect = len & 0xff; 4047 tf->lbal = len >> 8; 4048 } else { 4049 if (!send) 4050 tf->lbah = (1 << 7); 4051 } 4052 4053 ata_qc_set_pc_nbytes(qc); 4054 return 0; 4055 } 4056 4057 /** 4058 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4059 * @qc: Command to be translated 4060 * 4061 * Translate a SCSI variable length CDB to specified commands. 4062 * It checks a service action value in CDB to call corresponding handler. 4063 * 4064 * RETURNS: 4065 * Zero on success, non-zero on failure 4066 * 4067 */ 4068 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4069 { 4070 struct scsi_cmnd *scmd = qc->scsicmd; 4071 const u8 *cdb = scmd->cmnd; 4072 const u16 sa = get_unaligned_be16(&cdb[8]); 4073 4074 /* 4075 * if service action represents a ata pass-thru(32) command, 4076 * then pass it to ata_scsi_pass_thru handler. 4077 */ 4078 if (sa == ATA_32) 4079 return ata_scsi_pass_thru(qc); 4080 4081 /* unsupported service action */ 4082 return 1; 4083 } 4084 4085 /** 4086 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4087 * @dev: ATA device 4088 * @cmd: SCSI command opcode to consider 4089 * 4090 * Look up the SCSI command given, and determine whether the 4091 * SCSI command is to be translated or simulated. 4092 * 4093 * RETURNS: 4094 * Pointer to translation function if possible, %NULL if not. 4095 */ 4096 4097 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4098 { 4099 switch (cmd) { 4100 case READ_6: 4101 case READ_10: 4102 case READ_16: 4103 4104 case WRITE_6: 4105 case WRITE_10: 4106 case WRITE_16: 4107 return ata_scsi_rw_xlat; 4108 4109 case WRITE_SAME_16: 4110 return ata_scsi_write_same_xlat; 4111 4112 case SYNCHRONIZE_CACHE: 4113 case SYNCHRONIZE_CACHE_16: 4114 if (ata_try_flush_cache(dev)) 4115 return ata_scsi_flush_xlat; 4116 break; 4117 4118 case VERIFY: 4119 case VERIFY_16: 4120 return ata_scsi_verify_xlat; 4121 4122 case ATA_12: 4123 case ATA_16: 4124 return ata_scsi_pass_thru; 4125 4126 case VARIABLE_LENGTH_CMD: 4127 return ata_scsi_var_len_cdb_xlat; 4128 4129 case MODE_SELECT: 4130 case MODE_SELECT_10: 4131 return ata_scsi_mode_select_xlat; 4132 4133 case ZBC_IN: 4134 return ata_scsi_zbc_in_xlat; 4135 4136 case ZBC_OUT: 4137 return ata_scsi_zbc_out_xlat; 4138 4139 case SECURITY_PROTOCOL_IN: 4140 case SECURITY_PROTOCOL_OUT: 4141 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4142 break; 4143 return ata_scsi_security_inout_xlat; 4144 4145 case START_STOP: 4146 return ata_scsi_start_stop_xlat; 4147 } 4148 4149 return NULL; 4150 } 4151 4152 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4153 { 4154 struct ata_port *ap = dev->link->ap; 4155 u8 scsi_op = scmd->cmnd[0]; 4156 ata_xlat_func_t xlat_func; 4157 4158 /* 4159 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4160 * However, this check is done without holding the ap->lock (a libata 4161 * specific lock), so we can have received an error irq since then, 4162 * therefore we must check if EH is pending, while holding ap->lock. 4163 */ 4164 if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) 4165 return SCSI_MLQUEUE_DEVICE_BUSY; 4166 4167 if (unlikely(!scmd->cmd_len)) 4168 goto bad_cdb_len; 4169 4170 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4171 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4172 goto bad_cdb_len; 4173 4174 xlat_func = ata_get_xlat_func(dev, scsi_op); 4175 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4176 /* relay SCSI command to ATAPI device */ 4177 int len = COMMAND_SIZE(scsi_op); 4178 4179 if (unlikely(len > scmd->cmd_len || 4180 len > dev->cdb_len || 4181 scmd->cmd_len > ATAPI_CDB_LEN)) 4182 goto bad_cdb_len; 4183 4184 xlat_func = atapi_xlat; 4185 } else { 4186 /* ATA_16 passthru, treat as an ATA command */ 4187 if (unlikely(scmd->cmd_len > 16)) 4188 goto bad_cdb_len; 4189 4190 xlat_func = ata_get_xlat_func(dev, scsi_op); 4191 } 4192 4193 if (xlat_func) 4194 return ata_scsi_translate(dev, scmd, xlat_func); 4195 4196 ata_scsi_simulate(dev, scmd); 4197 4198 return 0; 4199 4200 bad_cdb_len: 4201 scmd->result = DID_ERROR << 16; 4202 scsi_done(scmd); 4203 return 0; 4204 } 4205 4206 /** 4207 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4208 * @shost: SCSI host of command to be sent 4209 * @cmd: SCSI command to be sent 4210 * 4211 * In some cases, this function translates SCSI commands into 4212 * ATA taskfiles, and queues the taskfiles to be sent to 4213 * hardware. In other cases, this function simulates a 4214 * SCSI device by evaluating and responding to certain 4215 * SCSI commands. This creates the overall effect of 4216 * ATA and ATAPI devices appearing as SCSI devices. 4217 * 4218 * LOCKING: 4219 * ATA host lock 4220 * 4221 * RETURNS: 4222 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4223 * 0 otherwise. 4224 */ 4225 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4226 { 4227 struct ata_port *ap; 4228 struct ata_device *dev; 4229 struct scsi_device *scsidev = cmd->device; 4230 int rc = 0; 4231 unsigned long irq_flags; 4232 4233 ap = ata_shost_to_port(shost); 4234 4235 spin_lock_irqsave(ap->lock, irq_flags); 4236 4237 dev = ata_scsi_find_dev(ap, scsidev); 4238 if (likely(dev)) 4239 rc = __ata_scsi_queuecmd(cmd, dev); 4240 else { 4241 cmd->result = (DID_BAD_TARGET << 16); 4242 scsi_done(cmd); 4243 } 4244 4245 spin_unlock_irqrestore(ap->lock, irq_flags); 4246 4247 return rc; 4248 } 4249 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4250 4251 /** 4252 * ata_scsi_simulate - simulate SCSI command on ATA device 4253 * @dev: the target device 4254 * @cmd: SCSI command being sent to device. 4255 * 4256 * Interprets and directly executes a select list of SCSI commands 4257 * that can be handled internally. 4258 * 4259 * LOCKING: 4260 * spin_lock_irqsave(host lock) 4261 */ 4262 4263 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4264 { 4265 struct ata_scsi_args args; 4266 const u8 *scsicmd = cmd->cmnd; 4267 u8 tmp8; 4268 4269 args.dev = dev; 4270 args.id = dev->id; 4271 args.cmd = cmd; 4272 4273 switch(scsicmd[0]) { 4274 case INQUIRY: 4275 if (scsicmd[1] & 2) /* is CmdDt set? */ 4276 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4277 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4278 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4279 else switch (scsicmd[2]) { 4280 case 0x00: 4281 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4282 break; 4283 case 0x80: 4284 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4285 break; 4286 case 0x83: 4287 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4288 break; 4289 case 0x89: 4290 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4291 break; 4292 case 0xb0: 4293 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4294 break; 4295 case 0xb1: 4296 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4297 break; 4298 case 0xb2: 4299 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4300 break; 4301 case 0xb6: 4302 if (dev->flags & ATA_DFLAG_ZAC) 4303 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4304 else 4305 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4306 break; 4307 case 0xb9: 4308 if (dev->cpr_log) 4309 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4310 else 4311 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4312 break; 4313 default: 4314 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4315 break; 4316 } 4317 break; 4318 4319 case MODE_SENSE: 4320 case MODE_SENSE_10: 4321 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4322 break; 4323 4324 case READ_CAPACITY: 4325 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4326 break; 4327 4328 case SERVICE_ACTION_IN_16: 4329 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4330 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4331 else 4332 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4333 break; 4334 4335 case REPORT_LUNS: 4336 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4337 break; 4338 4339 case REQUEST_SENSE: 4340 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4341 break; 4342 4343 /* if we reach this, then writeback caching is disabled, 4344 * turning this into a no-op. 4345 */ 4346 case SYNCHRONIZE_CACHE: 4347 case SYNCHRONIZE_CACHE_16: 4348 fallthrough; 4349 4350 /* no-op's, complete with success */ 4351 case REZERO_UNIT: 4352 case SEEK_6: 4353 case SEEK_10: 4354 case TEST_UNIT_READY: 4355 break; 4356 4357 case SEND_DIAGNOSTIC: 4358 tmp8 = scsicmd[1] & ~(1 << 3); 4359 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4360 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4361 break; 4362 4363 case MAINTENANCE_IN: 4364 if ((scsicmd[1] & 0x1f) == MI_REPORT_SUPPORTED_OPERATION_CODES) 4365 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4366 else 4367 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4368 break; 4369 4370 /* all other commands */ 4371 default: 4372 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4373 /* "Invalid command operation code" */ 4374 break; 4375 } 4376 4377 scsi_done(cmd); 4378 } 4379 4380 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4381 { 4382 int i, rc; 4383 4384 for (i = 0; i < host->n_ports; i++) { 4385 struct ata_port *ap = host->ports[i]; 4386 struct Scsi_Host *shost; 4387 4388 rc = -ENOMEM; 4389 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4390 if (!shost) 4391 goto err_alloc; 4392 4393 shost->eh_noresume = 1; 4394 *(struct ata_port **)&shost->hostdata[0] = ap; 4395 ap->scsi_host = shost; 4396 4397 shost->transportt = ata_scsi_transport_template; 4398 shost->unique_id = ap->print_id; 4399 shost->max_id = 16; 4400 shost->max_lun = 1; 4401 shost->max_channel = 1; 4402 shost->max_cmd_len = 32; 4403 4404 /* Schedule policy is determined by ->qc_defer() 4405 * callback and it needs to see every deferred qc. 4406 * Set host_blocked to 1 to prevent SCSI midlayer from 4407 * automatically deferring requests. 4408 */ 4409 shost->max_host_blocked = 1; 4410 4411 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4412 if (rc) 4413 goto err_alloc; 4414 } 4415 4416 return 0; 4417 4418 err_alloc: 4419 while (--i >= 0) { 4420 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4421 4422 /* scsi_host_put() is in ata_devres_release() */ 4423 scsi_remove_host(shost); 4424 } 4425 return rc; 4426 } 4427 4428 #ifdef CONFIG_OF 4429 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4430 { 4431 struct scsi_device *sdev = dev->sdev; 4432 struct device *d = ap->host->dev; 4433 struct device_node *np = d->of_node; 4434 struct device_node *child; 4435 4436 for_each_available_child_of_node(np, child) { 4437 int ret; 4438 u32 val; 4439 4440 ret = of_property_read_u32(child, "reg", &val); 4441 if (ret) 4442 continue; 4443 if (val == dev->devno) { 4444 dev_dbg(d, "found matching device node\n"); 4445 sdev->sdev_gendev.of_node = child; 4446 return; 4447 } 4448 } 4449 } 4450 #else 4451 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4452 { 4453 } 4454 #endif 4455 4456 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4457 { 4458 int tries = 5; 4459 struct ata_device *last_failed_dev = NULL; 4460 struct ata_link *link; 4461 struct ata_device *dev; 4462 4463 repeat: 4464 ata_for_each_link(link, ap, EDGE) { 4465 ata_for_each_dev(dev, link, ENABLED) { 4466 struct scsi_device *sdev; 4467 int channel = 0, id = 0; 4468 4469 if (dev->sdev) 4470 continue; 4471 4472 if (ata_is_host_link(link)) 4473 id = dev->devno; 4474 else 4475 channel = link->pmp; 4476 4477 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4478 NULL); 4479 if (!IS_ERR(sdev)) { 4480 dev->sdev = sdev; 4481 ata_scsi_assign_ofnode(dev, ap); 4482 scsi_device_put(sdev); 4483 } else { 4484 dev->sdev = NULL; 4485 } 4486 } 4487 } 4488 4489 /* If we scanned while EH was in progress or allocation 4490 * failure occurred, scan would have failed silently. Check 4491 * whether all devices are attached. 4492 */ 4493 ata_for_each_link(link, ap, EDGE) { 4494 ata_for_each_dev(dev, link, ENABLED) { 4495 if (!dev->sdev) 4496 goto exit_loop; 4497 } 4498 } 4499 exit_loop: 4500 if (!link) 4501 return; 4502 4503 /* we're missing some SCSI devices */ 4504 if (sync) { 4505 /* If caller requested synchrnous scan && we've made 4506 * any progress, sleep briefly and repeat. 4507 */ 4508 if (dev != last_failed_dev) { 4509 msleep(100); 4510 last_failed_dev = dev; 4511 goto repeat; 4512 } 4513 4514 /* We might be failing to detect boot device, give it 4515 * a few more chances. 4516 */ 4517 if (--tries) { 4518 msleep(100); 4519 goto repeat; 4520 } 4521 4522 ata_port_err(ap, 4523 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4524 } 4525 4526 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4527 round_jiffies_relative(HZ)); 4528 } 4529 4530 /** 4531 * ata_scsi_offline_dev - offline attached SCSI device 4532 * @dev: ATA device to offline attached SCSI device for 4533 * 4534 * This function is called from ata_eh_hotplug() and responsible 4535 * for taking the SCSI device attached to @dev offline. This 4536 * function is called with host lock which protects dev->sdev 4537 * against clearing. 4538 * 4539 * LOCKING: 4540 * spin_lock_irqsave(host lock) 4541 * 4542 * RETURNS: 4543 * 1 if attached SCSI device exists, 0 otherwise. 4544 */ 4545 int ata_scsi_offline_dev(struct ata_device *dev) 4546 { 4547 if (dev->sdev) { 4548 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4549 return 1; 4550 } 4551 return 0; 4552 } 4553 4554 /** 4555 * ata_scsi_remove_dev - remove attached SCSI device 4556 * @dev: ATA device to remove attached SCSI device for 4557 * 4558 * This function is called from ata_eh_scsi_hotplug() and 4559 * responsible for removing the SCSI device attached to @dev. 4560 * 4561 * LOCKING: 4562 * Kernel thread context (may sleep). 4563 */ 4564 static void ata_scsi_remove_dev(struct ata_device *dev) 4565 { 4566 struct ata_port *ap = dev->link->ap; 4567 struct scsi_device *sdev; 4568 unsigned long flags; 4569 4570 /* Alas, we need to grab scan_mutex to ensure SCSI device 4571 * state doesn't change underneath us and thus 4572 * scsi_device_get() always succeeds. The mutex locking can 4573 * be removed if there is __scsi_device_get() interface which 4574 * increments reference counts regardless of device state. 4575 */ 4576 mutex_lock(&ap->scsi_host->scan_mutex); 4577 spin_lock_irqsave(ap->lock, flags); 4578 4579 /* clearing dev->sdev is protected by host lock */ 4580 sdev = dev->sdev; 4581 dev->sdev = NULL; 4582 4583 if (sdev) { 4584 /* If user initiated unplug races with us, sdev can go 4585 * away underneath us after the host lock and 4586 * scan_mutex are released. Hold onto it. 4587 */ 4588 if (scsi_device_get(sdev) == 0) { 4589 /* The following ensures the attached sdev is 4590 * offline on return from ata_scsi_offline_dev() 4591 * regardless it wins or loses the race 4592 * against this function. 4593 */ 4594 scsi_device_set_state(sdev, SDEV_OFFLINE); 4595 } else { 4596 WARN_ON(1); 4597 sdev = NULL; 4598 } 4599 } 4600 4601 spin_unlock_irqrestore(ap->lock, flags); 4602 mutex_unlock(&ap->scsi_host->scan_mutex); 4603 4604 if (sdev) { 4605 ata_dev_info(dev, "detaching (SCSI %s)\n", 4606 dev_name(&sdev->sdev_gendev)); 4607 4608 scsi_remove_device(sdev); 4609 scsi_device_put(sdev); 4610 } 4611 } 4612 4613 static void ata_scsi_handle_link_detach(struct ata_link *link) 4614 { 4615 struct ata_port *ap = link->ap; 4616 struct ata_device *dev; 4617 4618 ata_for_each_dev(dev, link, ALL) { 4619 unsigned long flags; 4620 4621 spin_lock_irqsave(ap->lock, flags); 4622 if (!(dev->flags & ATA_DFLAG_DETACHED)) { 4623 spin_unlock_irqrestore(ap->lock, flags); 4624 continue; 4625 } 4626 4627 dev->flags &= ~ATA_DFLAG_DETACHED; 4628 spin_unlock_irqrestore(ap->lock, flags); 4629 4630 ata_scsi_remove_dev(dev); 4631 } 4632 } 4633 4634 /** 4635 * ata_scsi_media_change_notify - send media change event 4636 * @dev: Pointer to the disk device with media change event 4637 * 4638 * Tell the block layer to send a media change notification 4639 * event. 4640 * 4641 * LOCKING: 4642 * spin_lock_irqsave(host lock) 4643 */ 4644 void ata_scsi_media_change_notify(struct ata_device *dev) 4645 { 4646 if (dev->sdev) 4647 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4648 GFP_ATOMIC); 4649 } 4650 4651 /** 4652 * ata_scsi_hotplug - SCSI part of hotplug 4653 * @work: Pointer to ATA port to perform SCSI hotplug on 4654 * 4655 * Perform SCSI part of hotplug. It's executed from a separate 4656 * workqueue after EH completes. This is necessary because SCSI 4657 * hot plugging requires working EH and hot unplugging is 4658 * synchronized with hot plugging with a mutex. 4659 * 4660 * LOCKING: 4661 * Kernel thread context (may sleep). 4662 */ 4663 void ata_scsi_hotplug(struct work_struct *work) 4664 { 4665 struct ata_port *ap = 4666 container_of(work, struct ata_port, hotplug_task.work); 4667 int i; 4668 4669 if (ap->pflags & ATA_PFLAG_UNLOADING) 4670 return; 4671 4672 mutex_lock(&ap->scsi_scan_mutex); 4673 4674 /* Unplug detached devices. We cannot use link iterator here 4675 * because PMP links have to be scanned even if PMP is 4676 * currently not attached. Iterate manually. 4677 */ 4678 ata_scsi_handle_link_detach(&ap->link); 4679 if (ap->pmp_link) 4680 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4681 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4682 4683 /* scan for new ones */ 4684 ata_scsi_scan_host(ap, 0); 4685 4686 mutex_unlock(&ap->scsi_scan_mutex); 4687 } 4688 4689 /** 4690 * ata_scsi_user_scan - indication for user-initiated bus scan 4691 * @shost: SCSI host to scan 4692 * @channel: Channel to scan 4693 * @id: ID to scan 4694 * @lun: LUN to scan 4695 * 4696 * This function is called when user explicitly requests bus 4697 * scan. Set probe pending flag and invoke EH. 4698 * 4699 * LOCKING: 4700 * SCSI layer (we don't care) 4701 * 4702 * RETURNS: 4703 * Zero. 4704 */ 4705 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4706 unsigned int id, u64 lun) 4707 { 4708 struct ata_port *ap = ata_shost_to_port(shost); 4709 unsigned long flags; 4710 int devno, rc = 0; 4711 4712 if (lun != SCAN_WILD_CARD && lun) 4713 return -EINVAL; 4714 4715 if (!sata_pmp_attached(ap)) { 4716 if (channel != SCAN_WILD_CARD && channel) 4717 return -EINVAL; 4718 devno = id; 4719 } else { 4720 if (id != SCAN_WILD_CARD && id) 4721 return -EINVAL; 4722 devno = channel; 4723 } 4724 4725 spin_lock_irqsave(ap->lock, flags); 4726 4727 if (devno == SCAN_WILD_CARD) { 4728 struct ata_link *link; 4729 4730 ata_for_each_link(link, ap, EDGE) { 4731 struct ata_eh_info *ehi = &link->eh_info; 4732 ehi->probe_mask |= ATA_ALL_DEVICES; 4733 ehi->action |= ATA_EH_RESET; 4734 } 4735 } else { 4736 struct ata_device *dev = ata_find_dev(ap, devno); 4737 4738 if (dev) { 4739 struct ata_eh_info *ehi = &dev->link->eh_info; 4740 ehi->probe_mask |= 1 << dev->devno; 4741 ehi->action |= ATA_EH_RESET; 4742 } else 4743 rc = -EINVAL; 4744 } 4745 4746 if (rc == 0) { 4747 ata_port_schedule_eh(ap); 4748 spin_unlock_irqrestore(ap->lock, flags); 4749 ata_port_wait_eh(ap); 4750 } else 4751 spin_unlock_irqrestore(ap->lock, flags); 4752 4753 return rc; 4754 } 4755 4756 /** 4757 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4758 * @work: Pointer to ATA port to perform scsi_rescan_device() 4759 * 4760 * After ATA pass thru (SAT) commands are executed successfully, 4761 * libata need to propagate the changes to SCSI layer. 4762 * 4763 * LOCKING: 4764 * Kernel thread context (may sleep). 4765 */ 4766 void ata_scsi_dev_rescan(struct work_struct *work) 4767 { 4768 struct ata_port *ap = 4769 container_of(work, struct ata_port, scsi_rescan_task.work); 4770 struct ata_link *link; 4771 struct ata_device *dev; 4772 unsigned long flags; 4773 bool do_resume; 4774 int ret = 0; 4775 4776 mutex_lock(&ap->scsi_scan_mutex); 4777 spin_lock_irqsave(ap->lock, flags); 4778 4779 ata_for_each_link(link, ap, EDGE) { 4780 ata_for_each_dev(dev, link, ENABLED) { 4781 struct scsi_device *sdev = dev->sdev; 4782 4783 /* 4784 * If the port was suspended before this was scheduled, 4785 * bail out. 4786 */ 4787 if (ap->pflags & ATA_PFLAG_SUSPENDED) 4788 goto unlock_ap; 4789 4790 if (!sdev) 4791 continue; 4792 if (scsi_device_get(sdev)) 4793 continue; 4794 4795 do_resume = dev->flags & ATA_DFLAG_RESUMING; 4796 4797 spin_unlock_irqrestore(ap->lock, flags); 4798 if (do_resume) { 4799 ret = scsi_resume_device(sdev); 4800 if (ret == -EWOULDBLOCK) 4801 goto unlock_scan; 4802 dev->flags &= ~ATA_DFLAG_RESUMING; 4803 } 4804 ret = scsi_rescan_device(sdev); 4805 scsi_device_put(sdev); 4806 spin_lock_irqsave(ap->lock, flags); 4807 4808 if (ret) 4809 goto unlock_ap; 4810 } 4811 } 4812 4813 unlock_ap: 4814 spin_unlock_irqrestore(ap->lock, flags); 4815 unlock_scan: 4816 mutex_unlock(&ap->scsi_scan_mutex); 4817 4818 /* Reschedule with a delay if scsi_rescan_device() returned an error */ 4819 if (ret) 4820 schedule_delayed_work(&ap->scsi_rescan_task, 4821 msecs_to_jiffies(5)); 4822 } 4823