1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * libata-scsi.c - helper library for ATA 4 * 5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 6 * Copyright 2003-2004 Jeff Garzik 7 * 8 * libata documentation is available via 'make {ps|pdf}docs', 9 * as Documentation/driver-api/libata.rst 10 * 11 * Hardware documentation available from 12 * - http://www.t10.org/ 13 * - http://www.t13.org/ 14 */ 15 16 #include <linux/compat.h> 17 #include <linux/slab.h> 18 #include <linux/kernel.h> 19 #include <linux/blkdev.h> 20 #include <linux/spinlock.h> 21 #include <linux/export.h> 22 #include <scsi/scsi.h> 23 #include <scsi/scsi_host.h> 24 #include <scsi/scsi_cmnd.h> 25 #include <scsi/scsi_eh.h> 26 #include <scsi/scsi_device.h> 27 #include <scsi/scsi_tcq.h> 28 #include <scsi/scsi_transport.h> 29 #include <linux/libata.h> 30 #include <linux/hdreg.h> 31 #include <linux/uaccess.h> 32 #include <linux/suspend.h> 33 #include <asm/unaligned.h> 34 #include <linux/ioprio.h> 35 #include <linux/of.h> 36 37 #include "libata.h" 38 #include "libata-transport.h" 39 40 #define ATA_SCSI_RBUF_SIZE 2048 41 42 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 43 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 44 45 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 46 47 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 48 const struct scsi_device *scsidev); 49 50 #define RW_RECOVERY_MPAGE 0x1 51 #define RW_RECOVERY_MPAGE_LEN 12 52 #define CACHE_MPAGE 0x8 53 #define CACHE_MPAGE_LEN 20 54 #define CONTROL_MPAGE 0xa 55 #define CONTROL_MPAGE_LEN 12 56 #define ALL_MPAGES 0x3f 57 #define ALL_SUB_MPAGES 0xff 58 #define CDL_T2A_SUB_MPAGE 0x07 59 #define CDL_T2B_SUB_MPAGE 0x08 60 #define CDL_T2_SUB_MPAGE_LEN 232 61 #define ATA_FEATURE_SUB_MPAGE 0xf2 62 #define ATA_FEATURE_SUB_MPAGE_LEN 16 63 64 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 65 RW_RECOVERY_MPAGE, 66 RW_RECOVERY_MPAGE_LEN - 2, 67 (1 << 7), /* AWRE */ 68 0, /* read retry count */ 69 0, 0, 0, 0, 70 0, /* write retry count */ 71 0, 0, 0 72 }; 73 74 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 75 CACHE_MPAGE, 76 CACHE_MPAGE_LEN - 2, 77 0, /* contains WCE, needs to be 0 for logic */ 78 0, 0, 0, 0, 0, 0, 0, 0, 0, 79 0, /* contains DRA, needs to be 0 for logic */ 80 0, 0, 0, 0, 0, 0, 0 81 }; 82 83 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 84 CONTROL_MPAGE, 85 CONTROL_MPAGE_LEN - 2, 86 2, /* DSENSE=0, GLTSD=1 */ 87 0, /* [QAM+QERR may be 1, see 05-359r1] */ 88 0, 0, 0, 0, 0xff, 0xff, 89 0, 30 /* extended self test time, see 05-359r1 */ 90 }; 91 92 static ssize_t ata_scsi_park_show(struct device *device, 93 struct device_attribute *attr, char *buf) 94 { 95 struct scsi_device *sdev = to_scsi_device(device); 96 struct ata_port *ap; 97 struct ata_link *link; 98 struct ata_device *dev; 99 unsigned long now; 100 unsigned int msecs; 101 int rc = 0; 102 103 ap = ata_shost_to_port(sdev->host); 104 105 spin_lock_irq(ap->lock); 106 dev = ata_scsi_find_dev(ap, sdev); 107 if (!dev) { 108 rc = -ENODEV; 109 goto unlock; 110 } 111 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 112 rc = -EOPNOTSUPP; 113 goto unlock; 114 } 115 116 link = dev->link; 117 now = jiffies; 118 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 119 link->eh_context.unloaded_mask & (1 << dev->devno) && 120 time_after(dev->unpark_deadline, now)) 121 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 122 else 123 msecs = 0; 124 125 unlock: 126 spin_unlock_irq(ap->lock); 127 128 return rc ? rc : sysfs_emit(buf, "%u\n", msecs); 129 } 130 131 static ssize_t ata_scsi_park_store(struct device *device, 132 struct device_attribute *attr, 133 const char *buf, size_t len) 134 { 135 struct scsi_device *sdev = to_scsi_device(device); 136 struct ata_port *ap; 137 struct ata_device *dev; 138 int input; 139 unsigned long flags; 140 int rc; 141 142 rc = kstrtoint(buf, 10, &input); 143 if (rc) 144 return rc; 145 if (input < -2) 146 return -EINVAL; 147 if (input > ATA_TMOUT_MAX_PARK) { 148 rc = -EOVERFLOW; 149 input = ATA_TMOUT_MAX_PARK; 150 } 151 152 ap = ata_shost_to_port(sdev->host); 153 154 spin_lock_irqsave(ap->lock, flags); 155 dev = ata_scsi_find_dev(ap, sdev); 156 if (unlikely(!dev)) { 157 rc = -ENODEV; 158 goto unlock; 159 } 160 if (dev->class != ATA_DEV_ATA && 161 dev->class != ATA_DEV_ZAC) { 162 rc = -EOPNOTSUPP; 163 goto unlock; 164 } 165 166 if (input >= 0) { 167 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 168 rc = -EOPNOTSUPP; 169 goto unlock; 170 } 171 172 dev->unpark_deadline = ata_deadline(jiffies, input); 173 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 174 ata_port_schedule_eh(ap); 175 complete(&ap->park_req_pending); 176 } else { 177 switch (input) { 178 case -1: 179 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 180 break; 181 case -2: 182 dev->flags |= ATA_DFLAG_NO_UNLOAD; 183 break; 184 } 185 } 186 unlock: 187 spin_unlock_irqrestore(ap->lock, flags); 188 189 return rc ? rc : len; 190 } 191 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 192 ata_scsi_park_show, ata_scsi_park_store); 193 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 194 195 bool ata_scsi_sense_is_valid(u8 sk, u8 asc, u8 ascq) 196 { 197 /* 198 * If sk == NO_SENSE, and asc + ascq == NO ADDITIONAL SENSE INFORMATION, 199 * then there is no sense data to add. 200 */ 201 if (sk == 0 && asc == 0 && ascq == 0) 202 return false; 203 204 /* If sk > COMPLETED, sense data is bogus. */ 205 if (sk > COMPLETED) 206 return false; 207 208 return true; 209 } 210 211 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 212 u8 sk, u8 asc, u8 ascq) 213 { 214 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 215 216 scsi_build_sense(cmd, d_sense, sk, asc, ascq); 217 } 218 219 void ata_scsi_set_sense_information(struct ata_device *dev, 220 struct scsi_cmnd *cmd, 221 const struct ata_taskfile *tf) 222 { 223 u64 information; 224 225 information = ata_tf_read_block(tf, dev); 226 if (information == U64_MAX) 227 return; 228 229 scsi_set_sense_information(cmd->sense_buffer, 230 SCSI_SENSE_BUFFERSIZE, information); 231 } 232 233 /** 234 * ata_scsi_set_passthru_sense_fields - Set ATA fields in sense buffer 235 * @qc: ATA PASS-THROUGH command. 236 * 237 * Populates "ATA Status Return sense data descriptor" / "Fixed format 238 * sense data" with ATA taskfile fields. 239 * 240 * LOCKING: 241 * None. 242 */ 243 static void ata_scsi_set_passthru_sense_fields(struct ata_queued_cmd *qc) 244 { 245 struct 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 } else { 1695 /* Keep the SCSI ML and status byte, clear host byte. */ 1696 cmd->result &= 0x0000ffff; 1697 } 1698 1699 ata_qc_done(qc); 1700 } 1701 1702 /** 1703 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1704 * @dev: ATA device to which the command is addressed 1705 * @cmd: SCSI command to execute 1706 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1707 * 1708 * Our ->queuecommand() function has decided that the SCSI 1709 * command issued can be directly translated into an ATA 1710 * command, rather than handled internally. 1711 * 1712 * This function sets up an ata_queued_cmd structure for the 1713 * SCSI command, and sends that ata_queued_cmd to the hardware. 1714 * 1715 * The xlat_func argument (actor) returns 0 if ready to execute 1716 * ATA command, else 1 to finish translation. If 1 is returned 1717 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1718 * to be set reflecting an error condition or clean (early) 1719 * termination. 1720 * 1721 * LOCKING: 1722 * spin_lock_irqsave(host lock) 1723 * 1724 * RETURNS: 1725 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1726 * needs to be deferred. 1727 */ 1728 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1729 ata_xlat_func_t xlat_func) 1730 { 1731 struct ata_port *ap = dev->link->ap; 1732 struct ata_queued_cmd *qc; 1733 int rc; 1734 1735 qc = ata_scsi_qc_new(dev, cmd); 1736 if (!qc) 1737 goto err_mem; 1738 1739 /* data is present; dma-map it */ 1740 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1741 cmd->sc_data_direction == DMA_TO_DEVICE) { 1742 if (unlikely(scsi_bufflen(cmd) < 1)) { 1743 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1744 goto err_did; 1745 } 1746 1747 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1748 1749 qc->dma_dir = cmd->sc_data_direction; 1750 } 1751 1752 qc->complete_fn = ata_scsi_qc_complete; 1753 1754 if (xlat_func(qc)) 1755 goto early_finish; 1756 1757 if (ap->ops->qc_defer) { 1758 if ((rc = ap->ops->qc_defer(qc))) 1759 goto defer; 1760 } 1761 1762 /* select device, send command to hardware */ 1763 ata_qc_issue(qc); 1764 1765 return 0; 1766 1767 early_finish: 1768 ata_qc_free(qc); 1769 scsi_done(cmd); 1770 return 0; 1771 1772 err_did: 1773 ata_qc_free(qc); 1774 cmd->result = (DID_ERROR << 16); 1775 scsi_done(cmd); 1776 err_mem: 1777 return 0; 1778 1779 defer: 1780 ata_qc_free(qc); 1781 if (rc == ATA_DEFER_LINK) 1782 return SCSI_MLQUEUE_DEVICE_BUSY; 1783 else 1784 return SCSI_MLQUEUE_HOST_BUSY; 1785 } 1786 1787 struct ata_scsi_args { 1788 struct ata_device *dev; 1789 u16 *id; 1790 struct scsi_cmnd *cmd; 1791 }; 1792 1793 /** 1794 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1795 * @args: device IDENTIFY data / SCSI command of interest. 1796 * @actor: Callback hook for desired SCSI command simulator 1797 * 1798 * Takes care of the hard work of simulating a SCSI command... 1799 * Mapping the response buffer, calling the command's handler, 1800 * and handling the handler's return value. This return value 1801 * indicates whether the handler wishes the SCSI command to be 1802 * completed successfully (0), or not (in which case cmd->result 1803 * and sense buffer are assumed to be set). 1804 * 1805 * LOCKING: 1806 * spin_lock_irqsave(host lock) 1807 */ 1808 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1809 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1810 { 1811 unsigned int rc; 1812 struct scsi_cmnd *cmd = args->cmd; 1813 unsigned long flags; 1814 1815 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1816 1817 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1818 rc = actor(args, ata_scsi_rbuf); 1819 if (rc == 0) 1820 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1821 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1822 1823 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1824 1825 if (rc == 0) 1826 cmd->result = SAM_STAT_GOOD; 1827 } 1828 1829 /** 1830 * ata_scsiop_inq_std - Simulate INQUIRY command 1831 * @args: device IDENTIFY data / SCSI command of interest. 1832 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1833 * 1834 * Returns standard device identification data associated 1835 * with non-VPD INQUIRY command output. 1836 * 1837 * LOCKING: 1838 * spin_lock_irqsave(host lock) 1839 */ 1840 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1841 { 1842 static const u8 versions[] = { 1843 0x00, 1844 0x60, /* SAM-3 (no version claimed) */ 1845 1846 0x03, 1847 0x20, /* SBC-2 (no version claimed) */ 1848 1849 0x03, 1850 0x00 /* SPC-3 (no version claimed) */ 1851 }; 1852 static const u8 versions_zbc[] = { 1853 0x00, 1854 0xA0, /* SAM-5 (no version claimed) */ 1855 1856 0x06, 1857 0x00, /* SBC-4 (no version claimed) */ 1858 1859 0x05, 1860 0xC0, /* SPC-5 (no version claimed) */ 1861 1862 0x60, 1863 0x24, /* ZBC r05 */ 1864 }; 1865 1866 u8 hdr[] = { 1867 TYPE_DISK, 1868 0, 1869 0x5, /* claim SPC-3 version compatibility */ 1870 2, 1871 95 - 4, 1872 0, 1873 0, 1874 2 1875 }; 1876 1877 /* 1878 * Set the SCSI Removable Media Bit (RMB) if the ATA removable media 1879 * device bit (obsolete since ATA-8 ACS) is set. 1880 */ 1881 if (ata_id_removable(args->id)) 1882 hdr[1] |= (1 << 7); 1883 1884 if (args->dev->class == ATA_DEV_ZAC) { 1885 hdr[0] = TYPE_ZBC; 1886 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1887 } 1888 1889 if (args->dev->flags & ATA_DFLAG_CDL) 1890 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 1891 1892 memcpy(rbuf, hdr, sizeof(hdr)); 1893 memcpy(&rbuf[8], "ATA ", 8); 1894 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1895 1896 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1897 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1898 if (strncmp(&rbuf[32], " ", 4) == 0) 1899 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1900 1901 if (rbuf[32] == 0 || rbuf[32] == ' ') 1902 memcpy(&rbuf[32], "n/a ", 4); 1903 1904 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1905 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1906 else 1907 memcpy(rbuf + 58, versions, sizeof(versions)); 1908 1909 return 0; 1910 } 1911 1912 /** 1913 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1914 * @args: device IDENTIFY data / SCSI command of interest. 1915 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1916 * 1917 * Returns list of inquiry VPD pages available. 1918 * 1919 * LOCKING: 1920 * spin_lock_irqsave(host lock) 1921 */ 1922 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1923 { 1924 int i, num_pages = 0; 1925 static const u8 pages[] = { 1926 0x00, /* page 0x00, this page */ 1927 0x80, /* page 0x80, unit serial no page */ 1928 0x83, /* page 0x83, device ident page */ 1929 0x89, /* page 0x89, ata info page */ 1930 0xb0, /* page 0xb0, block limits page */ 1931 0xb1, /* page 0xb1, block device characteristics page */ 1932 0xb2, /* page 0xb2, thin provisioning page */ 1933 0xb6, /* page 0xb6, zoned block device characteristics */ 1934 0xb9, /* page 0xb9, concurrent positioning ranges */ 1935 }; 1936 1937 for (i = 0; i < sizeof(pages); i++) { 1938 if (pages[i] == 0xb6 && 1939 !(args->dev->flags & ATA_DFLAG_ZAC)) 1940 continue; 1941 rbuf[num_pages + 4] = pages[i]; 1942 num_pages++; 1943 } 1944 rbuf[3] = num_pages; /* number of supported VPD pages */ 1945 return 0; 1946 } 1947 1948 /** 1949 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1950 * @args: device IDENTIFY data / SCSI command of interest. 1951 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1952 * 1953 * Returns ATA device serial number. 1954 * 1955 * LOCKING: 1956 * spin_lock_irqsave(host lock) 1957 */ 1958 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1959 { 1960 static const u8 hdr[] = { 1961 0, 1962 0x80, /* this page code */ 1963 0, 1964 ATA_ID_SERNO_LEN, /* page len */ 1965 }; 1966 1967 memcpy(rbuf, hdr, sizeof(hdr)); 1968 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1969 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1970 return 0; 1971 } 1972 1973 /** 1974 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1975 * @args: device IDENTIFY data / SCSI command of interest. 1976 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1977 * 1978 * Yields two logical unit device identification designators: 1979 * - vendor specific ASCII containing the ATA serial number 1980 * - SAT defined "t10 vendor id based" containing ASCII vendor 1981 * name ("ATA "), model and serial numbers. 1982 * 1983 * LOCKING: 1984 * spin_lock_irqsave(host lock) 1985 */ 1986 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 1987 { 1988 const int sat_model_serial_desc_len = 68; 1989 int num; 1990 1991 rbuf[1] = 0x83; /* this page code */ 1992 num = 4; 1993 1994 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1995 rbuf[num + 0] = 2; 1996 rbuf[num + 3] = ATA_ID_SERNO_LEN; 1997 num += 4; 1998 ata_id_string(args->id, (unsigned char *) rbuf + num, 1999 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2000 num += ATA_ID_SERNO_LEN; 2001 2002 /* SAT defined lu model and serial numbers descriptor */ 2003 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2004 rbuf[num + 0] = 2; 2005 rbuf[num + 1] = 1; 2006 rbuf[num + 3] = sat_model_serial_desc_len; 2007 num += 4; 2008 memcpy(rbuf + num, "ATA ", 8); 2009 num += 8; 2010 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2011 ATA_ID_PROD_LEN); 2012 num += ATA_ID_PROD_LEN; 2013 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2014 ATA_ID_SERNO_LEN); 2015 num += ATA_ID_SERNO_LEN; 2016 2017 if (ata_id_has_wwn(args->id)) { 2018 /* SAT defined lu world wide name */ 2019 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2020 rbuf[num + 0] = 1; 2021 rbuf[num + 1] = 3; 2022 rbuf[num + 3] = ATA_ID_WWN_LEN; 2023 num += 4; 2024 ata_id_string(args->id, (unsigned char *) rbuf + num, 2025 ATA_ID_WWN, ATA_ID_WWN_LEN); 2026 num += ATA_ID_WWN_LEN; 2027 } 2028 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2029 return 0; 2030 } 2031 2032 /** 2033 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2034 * @args: device IDENTIFY data / SCSI command of interest. 2035 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2036 * 2037 * Yields SAT-specified ATA VPD page. 2038 * 2039 * LOCKING: 2040 * spin_lock_irqsave(host lock) 2041 */ 2042 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2043 { 2044 rbuf[1] = 0x89; /* our page code */ 2045 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2046 rbuf[3] = (0x238 & 0xff); 2047 2048 memcpy(&rbuf[8], "linux ", 8); 2049 memcpy(&rbuf[16], "libata ", 16); 2050 memcpy(&rbuf[32], DRV_VERSION, 4); 2051 2052 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2053 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2054 /* TODO: PMP? */ 2055 2056 /* we don't store the ATA device signature, so we fake it */ 2057 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2058 rbuf[40] = 0x1; 2059 rbuf[48] = 0x1; 2060 2061 rbuf[56] = ATA_CMD_ID_ATA; 2062 2063 memcpy(&rbuf[60], &args->id[0], 512); 2064 return 0; 2065 } 2066 2067 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2068 { 2069 struct ata_device *dev = args->dev; 2070 u16 min_io_sectors; 2071 2072 rbuf[1] = 0xb0; 2073 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2074 2075 /* 2076 * Optimal transfer length granularity. 2077 * 2078 * This is always one physical block, but for disks with a smaller 2079 * logical than physical sector size we need to figure out what the 2080 * latter is. 2081 */ 2082 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2083 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2084 2085 /* 2086 * Optimal unmap granularity. 2087 * 2088 * The ATA spec doesn't even know about a granularity or alignment 2089 * for the TRIM command. We can leave away most of the unmap related 2090 * VPD page entries, but we have specifify a granularity to signal 2091 * that we support some form of unmap - in thise case via WRITE SAME 2092 * with the unmap bit set. 2093 */ 2094 if (ata_id_has_trim(args->id)) { 2095 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2096 2097 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2098 max_blocks = 128 << (20 - SECTOR_SHIFT); 2099 2100 put_unaligned_be64(max_blocks, &rbuf[36]); 2101 put_unaligned_be32(1, &rbuf[28]); 2102 } 2103 2104 return 0; 2105 } 2106 2107 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2108 { 2109 int form_factor = ata_id_form_factor(args->id); 2110 int media_rotation_rate = ata_id_rotation_rate(args->id); 2111 u8 zoned = ata_id_zoned_cap(args->id); 2112 2113 rbuf[1] = 0xb1; 2114 rbuf[3] = 0x3c; 2115 rbuf[4] = media_rotation_rate >> 8; 2116 rbuf[5] = media_rotation_rate; 2117 rbuf[7] = form_factor; 2118 if (zoned) 2119 rbuf[8] = (zoned << 4); 2120 2121 return 0; 2122 } 2123 2124 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2125 { 2126 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2127 rbuf[1] = 0xb2; 2128 rbuf[3] = 0x4; 2129 rbuf[5] = 1 << 6; /* TPWS */ 2130 2131 return 0; 2132 } 2133 2134 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2135 { 2136 /* 2137 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2138 */ 2139 rbuf[1] = 0xb6; 2140 rbuf[3] = 0x3C; 2141 2142 /* 2143 * URSWRZ bit is only meaningful for host-managed ZAC drives 2144 */ 2145 if (args->dev->zac_zoned_cap & 1) 2146 rbuf[4] |= 1; 2147 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2148 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2149 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2150 2151 return 0; 2152 } 2153 2154 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2155 { 2156 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2157 u8 *desc = &rbuf[64]; 2158 int i; 2159 2160 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2161 rbuf[1] = 0xb9; 2162 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2163 2164 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2165 desc[0] = cpr_log->cpr[i].num; 2166 desc[1] = cpr_log->cpr[i].num_storage_elements; 2167 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2168 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2169 } 2170 2171 return 0; 2172 } 2173 2174 /** 2175 * modecpy - Prepare response for MODE SENSE 2176 * @dest: output buffer 2177 * @src: data being copied 2178 * @n: length of mode page 2179 * @changeable: whether changeable parameters are requested 2180 * 2181 * Generate a generic MODE SENSE page for either current or changeable 2182 * parameters. 2183 * 2184 * LOCKING: 2185 * None. 2186 */ 2187 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2188 { 2189 if (changeable) { 2190 memcpy(dest, src, 2); 2191 memset(dest + 2, 0, n - 2); 2192 } else { 2193 memcpy(dest, src, n); 2194 } 2195 } 2196 2197 /** 2198 * ata_msense_caching - Simulate MODE SENSE caching info page 2199 * @id: device IDENTIFY data 2200 * @buf: output buffer 2201 * @changeable: whether changeable parameters are requested 2202 * 2203 * Generate a caching info page, which conditionally indicates 2204 * write caching to the SCSI layer, depending on device 2205 * capabilities. 2206 * 2207 * LOCKING: 2208 * None. 2209 */ 2210 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2211 { 2212 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2213 if (changeable) { 2214 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2215 } else { 2216 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2217 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2218 } 2219 return sizeof(def_cache_mpage); 2220 } 2221 2222 /* 2223 * Simulate MODE SENSE control mode page, sub-page 0. 2224 */ 2225 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2226 bool changeable) 2227 { 2228 modecpy(buf, def_control_mpage, 2229 sizeof(def_control_mpage), changeable); 2230 if (changeable) { 2231 /* ata_mselect_control() */ 2232 buf[2] |= (1 << 2); 2233 } else { 2234 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2235 2236 /* descriptor format sense data */ 2237 buf[2] |= (d_sense << 2); 2238 } 2239 2240 return sizeof(def_control_mpage); 2241 } 2242 2243 /* 2244 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2245 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2246 * only, take care of overflows. 2247 */ 2248 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2249 { 2250 u32 limit = get_unaligned_le32(buf); 2251 2252 return min_t(u32, limit / 10000, 65535); 2253 } 2254 2255 /* 2256 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2257 * (command duration limits T2A and T2B mode pages). 2258 */ 2259 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2260 u8 spg) 2261 { 2262 u8 *b, *cdl = dev->cdl, *desc; 2263 u32 policy; 2264 int i; 2265 2266 /* 2267 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2268 * are a header. The PAGE LENGTH field is the size of the page 2269 * excluding the header. 2270 */ 2271 buf[0] = CONTROL_MPAGE; 2272 buf[1] = spg; 2273 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2274 if (spg == CDL_T2A_SUB_MPAGE) { 2275 /* 2276 * Read descriptors map to the T2A page: 2277 * set perf_vs_duration_guidleine. 2278 */ 2279 buf[7] = (cdl[0] & 0x03) << 4; 2280 desc = cdl + 64; 2281 } else { 2282 /* Write descriptors map to the T2B page */ 2283 desc = cdl + 288; 2284 } 2285 2286 /* Fill the T2 page descriptors */ 2287 b = &buf[8]; 2288 policy = get_unaligned_le32(&cdl[0]); 2289 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2290 /* t2cdlunits: fixed to 10ms */ 2291 b[0] = 0x0a; 2292 2293 /* Max inactive time and its policy */ 2294 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2295 b[6] = ((policy >> 8) & 0x0f) << 4; 2296 2297 /* Max active time and its policy */ 2298 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2299 b[6] |= (policy >> 4) & 0x0f; 2300 2301 /* Command duration guideline and its policy */ 2302 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2303 b[14] = policy & 0x0f; 2304 } 2305 2306 return CDL_T2_SUB_MPAGE_LEN; 2307 } 2308 2309 /* 2310 * Simulate MODE SENSE control mode page, sub-page f2h 2311 * (ATA feature control mode page). 2312 */ 2313 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2314 u8 *buf) 2315 { 2316 /* PS=0, SPF=1 */ 2317 buf[0] = CONTROL_MPAGE | (1 << 6); 2318 buf[1] = ATA_FEATURE_SUB_MPAGE; 2319 2320 /* 2321 * The first four bytes of ATA Feature Control mode page are a header. 2322 * The PAGE LENGTH field is the size of the page excluding the header. 2323 */ 2324 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2325 2326 if (dev->flags & ATA_DFLAG_CDL) 2327 buf[4] = 0x02; /* Support T2A and T2B pages */ 2328 else 2329 buf[4] = 0; 2330 2331 return ATA_FEATURE_SUB_MPAGE_LEN; 2332 } 2333 2334 /** 2335 * ata_msense_control - Simulate MODE SENSE control mode page 2336 * @dev: ATA device of interest 2337 * @buf: output buffer 2338 * @spg: sub-page code 2339 * @changeable: whether changeable parameters are requested 2340 * 2341 * Generate a generic MODE SENSE control mode page. 2342 * 2343 * LOCKING: 2344 * None. 2345 */ 2346 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2347 u8 spg, bool changeable) 2348 { 2349 unsigned int n; 2350 2351 switch (spg) { 2352 case 0: 2353 return ata_msense_control_spg0(dev, buf, changeable); 2354 case CDL_T2A_SUB_MPAGE: 2355 case CDL_T2B_SUB_MPAGE: 2356 return ata_msense_control_spgt2(dev, buf, spg); 2357 case ATA_FEATURE_SUB_MPAGE: 2358 return ata_msense_control_ata_feature(dev, buf); 2359 case ALL_SUB_MPAGES: 2360 n = ata_msense_control_spg0(dev, buf, changeable); 2361 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2362 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2363 n += ata_msense_control_ata_feature(dev, buf + n); 2364 return n; 2365 default: 2366 return 0; 2367 } 2368 } 2369 2370 /** 2371 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2372 * @buf: output buffer 2373 * @changeable: whether changeable parameters are requested 2374 * 2375 * Generate a generic MODE SENSE r/w error recovery page. 2376 * 2377 * LOCKING: 2378 * None. 2379 */ 2380 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2381 { 2382 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2383 changeable); 2384 return sizeof(def_rw_recovery_mpage); 2385 } 2386 2387 /** 2388 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2389 * @args: device IDENTIFY data / SCSI command of interest. 2390 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2391 * 2392 * Simulate MODE SENSE commands. Assume this is invoked for direct 2393 * access devices (e.g. disks) only. There should be no block 2394 * descriptor for other device types. 2395 * 2396 * LOCKING: 2397 * spin_lock_irqsave(host lock) 2398 */ 2399 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2400 { 2401 struct ata_device *dev = args->dev; 2402 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2403 static const u8 sat_blk_desc[] = { 2404 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2405 0, 2406 0, 0x2, 0x0 /* block length: 512 bytes */ 2407 }; 2408 u8 pg, spg; 2409 unsigned int ebd, page_control, six_byte; 2410 u8 dpofua = 0, bp = 0xff; 2411 u16 fp; 2412 2413 six_byte = (scsicmd[0] == MODE_SENSE); 2414 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2415 /* 2416 * LLBA bit in msense(10) ignored (compliant) 2417 */ 2418 2419 page_control = scsicmd[2] >> 6; 2420 switch (page_control) { 2421 case 0: /* current */ 2422 case 1: /* changeable */ 2423 case 2: /* defaults */ 2424 break; /* supported */ 2425 case 3: /* saved */ 2426 goto saving_not_supp; 2427 default: 2428 fp = 2; 2429 bp = 6; 2430 goto invalid_fld; 2431 } 2432 2433 if (six_byte) 2434 p += 4 + (ebd ? 8 : 0); 2435 else 2436 p += 8 + (ebd ? 8 : 0); 2437 2438 pg = scsicmd[2] & 0x3f; 2439 spg = scsicmd[3]; 2440 2441 /* 2442 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2443 * the control page. 2444 */ 2445 if (spg) { 2446 switch (spg) { 2447 case ALL_SUB_MPAGES: 2448 break; 2449 case CDL_T2A_SUB_MPAGE: 2450 case CDL_T2B_SUB_MPAGE: 2451 case ATA_FEATURE_SUB_MPAGE: 2452 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2453 break; 2454 fallthrough; 2455 default: 2456 fp = 3; 2457 goto invalid_fld; 2458 } 2459 } 2460 2461 switch(pg) { 2462 case RW_RECOVERY_MPAGE: 2463 p += ata_msense_rw_recovery(p, page_control == 1); 2464 break; 2465 2466 case CACHE_MPAGE: 2467 p += ata_msense_caching(args->id, p, page_control == 1); 2468 break; 2469 2470 case CONTROL_MPAGE: 2471 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2472 break; 2473 2474 case ALL_MPAGES: 2475 p += ata_msense_rw_recovery(p, page_control == 1); 2476 p += ata_msense_caching(args->id, p, page_control == 1); 2477 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2478 break; 2479 2480 default: /* invalid page code */ 2481 fp = 2; 2482 goto invalid_fld; 2483 } 2484 2485 if (dev->flags & ATA_DFLAG_FUA) 2486 dpofua = 1 << 4; 2487 2488 if (six_byte) { 2489 rbuf[0] = p - rbuf - 1; 2490 rbuf[2] |= dpofua; 2491 if (ebd) { 2492 rbuf[3] = sizeof(sat_blk_desc); 2493 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2494 } 2495 } else { 2496 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2497 rbuf[3] |= dpofua; 2498 if (ebd) { 2499 rbuf[7] = sizeof(sat_blk_desc); 2500 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2501 } 2502 } 2503 return 0; 2504 2505 invalid_fld: 2506 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2507 return 1; 2508 2509 saving_not_supp: 2510 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2511 /* "Saving parameters not supported" */ 2512 return 1; 2513 } 2514 2515 /** 2516 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2517 * @args: device IDENTIFY data / SCSI command of interest. 2518 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2519 * 2520 * Simulate READ CAPACITY commands. 2521 * 2522 * LOCKING: 2523 * None. 2524 */ 2525 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2526 { 2527 struct ata_device *dev = args->dev; 2528 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2529 u32 sector_size; /* physical sector size in bytes */ 2530 u8 log2_per_phys; 2531 u16 lowest_aligned; 2532 2533 sector_size = ata_id_logical_sector_size(dev->id); 2534 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2535 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2536 2537 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2538 if (last_lba >= 0xffffffffULL) 2539 last_lba = 0xffffffff; 2540 2541 /* sector count, 32-bit */ 2542 rbuf[0] = last_lba >> (8 * 3); 2543 rbuf[1] = last_lba >> (8 * 2); 2544 rbuf[2] = last_lba >> (8 * 1); 2545 rbuf[3] = last_lba; 2546 2547 /* sector size */ 2548 rbuf[4] = sector_size >> (8 * 3); 2549 rbuf[5] = sector_size >> (8 * 2); 2550 rbuf[6] = sector_size >> (8 * 1); 2551 rbuf[7] = sector_size; 2552 } else { 2553 /* sector count, 64-bit */ 2554 rbuf[0] = last_lba >> (8 * 7); 2555 rbuf[1] = last_lba >> (8 * 6); 2556 rbuf[2] = last_lba >> (8 * 5); 2557 rbuf[3] = last_lba >> (8 * 4); 2558 rbuf[4] = last_lba >> (8 * 3); 2559 rbuf[5] = last_lba >> (8 * 2); 2560 rbuf[6] = last_lba >> (8 * 1); 2561 rbuf[7] = last_lba; 2562 2563 /* sector size */ 2564 rbuf[ 8] = sector_size >> (8 * 3); 2565 rbuf[ 9] = sector_size >> (8 * 2); 2566 rbuf[10] = sector_size >> (8 * 1); 2567 rbuf[11] = sector_size; 2568 2569 rbuf[12] = 0; 2570 rbuf[13] = log2_per_phys; 2571 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2572 rbuf[15] = lowest_aligned; 2573 2574 if (ata_id_has_trim(args->id) && 2575 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2576 rbuf[14] |= 0x80; /* LBPME */ 2577 2578 if (ata_id_has_zero_after_trim(args->id) && 2579 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2580 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2581 rbuf[14] |= 0x40; /* LBPRZ */ 2582 } 2583 } 2584 if (ata_id_zoned_cap(args->id) || 2585 args->dev->class == ATA_DEV_ZAC) 2586 rbuf[12] = (1 << 4); /* RC_BASIS */ 2587 } 2588 return 0; 2589 } 2590 2591 /** 2592 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2593 * @args: device IDENTIFY data / SCSI command of interest. 2594 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2595 * 2596 * Simulate REPORT LUNS command. 2597 * 2598 * LOCKING: 2599 * spin_lock_irqsave(host lock) 2600 */ 2601 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2602 { 2603 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2604 2605 return 0; 2606 } 2607 2608 /* 2609 * ATAPI devices typically report zero for their SCSI version, and sometimes 2610 * deviate from the spec WRT response data format. If SCSI version is 2611 * reported as zero like normal, then we make the following fixups: 2612 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2613 * modern device. 2614 * 2) Ensure response data format / ATAPI information are always correct. 2615 */ 2616 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2617 { 2618 u8 buf[4]; 2619 2620 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2621 if (buf[2] == 0) { 2622 buf[2] = 0x5; 2623 buf[3] = 0x32; 2624 } 2625 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2626 } 2627 2628 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2629 { 2630 struct scsi_cmnd *cmd = qc->scsicmd; 2631 unsigned int err_mask = qc->err_mask; 2632 2633 /* handle completion from EH */ 2634 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2635 2636 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2637 ata_gen_passthru_sense(qc); 2638 2639 /* SCSI EH automatically locks door if sdev->locked is 2640 * set. Sometimes door lock request continues to 2641 * fail, for example, when no media is present. This 2642 * creates a loop - SCSI EH issues door lock which 2643 * fails and gets invoked again to acquire sense data 2644 * for the failed command. 2645 * 2646 * If door lock fails, always clear sdev->locked to 2647 * avoid this infinite loop. 2648 * 2649 * This may happen before SCSI scan is complete. Make 2650 * sure qc->dev->sdev isn't NULL before dereferencing. 2651 */ 2652 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2653 qc->dev->sdev->locked = 0; 2654 2655 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2656 ata_qc_done(qc); 2657 return; 2658 } 2659 2660 /* successful completion path */ 2661 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2662 atapi_fixup_inquiry(cmd); 2663 cmd->result = SAM_STAT_GOOD; 2664 2665 ata_qc_done(qc); 2666 } 2667 /** 2668 * atapi_xlat - Initialize PACKET taskfile 2669 * @qc: command structure to be initialized 2670 * 2671 * LOCKING: 2672 * spin_lock_irqsave(host lock) 2673 * 2674 * RETURNS: 2675 * Zero on success, non-zero on failure. 2676 */ 2677 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2678 { 2679 struct scsi_cmnd *scmd = qc->scsicmd; 2680 struct ata_device *dev = qc->dev; 2681 int nodata = (scmd->sc_data_direction == DMA_NONE); 2682 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2683 unsigned int nbytes; 2684 2685 memset(qc->cdb, 0, dev->cdb_len); 2686 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2687 2688 qc->complete_fn = atapi_qc_complete; 2689 2690 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2691 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2692 qc->tf.flags |= ATA_TFLAG_WRITE; 2693 } 2694 2695 qc->tf.command = ATA_CMD_PACKET; 2696 ata_qc_set_pc_nbytes(qc); 2697 2698 /* check whether ATAPI DMA is safe */ 2699 if (!nodata && !using_pio && atapi_check_dma(qc)) 2700 using_pio = 1; 2701 2702 /* Some controller variants snoop this value for Packet 2703 * transfers to do state machine and FIFO management. Thus we 2704 * want to set it properly, and for DMA where it is 2705 * effectively meaningless. 2706 */ 2707 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2708 2709 /* Most ATAPI devices which honor transfer chunk size don't 2710 * behave according to the spec when odd chunk size which 2711 * matches the transfer length is specified. If the number of 2712 * bytes to transfer is 2n+1. According to the spec, what 2713 * should happen is to indicate that 2n+1 is going to be 2714 * transferred and transfer 2n+2 bytes where the last byte is 2715 * padding. 2716 * 2717 * In practice, this doesn't happen. ATAPI devices first 2718 * indicate and transfer 2n bytes and then indicate and 2719 * transfer 2 bytes where the last byte is padding. 2720 * 2721 * This inconsistency confuses several controllers which 2722 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2723 * These controllers use actual number of transferred bytes to 2724 * update DMA pointer and transfer of 4n+2 bytes make those 2725 * controller push DMA pointer by 4n+4 bytes because SATA data 2726 * FISes are aligned to 4 bytes. This causes data corruption 2727 * and buffer overrun. 2728 * 2729 * Always setting nbytes to even number solves this problem 2730 * because then ATAPI devices don't have to split data at 2n 2731 * boundaries. 2732 */ 2733 if (nbytes & 0x1) 2734 nbytes++; 2735 2736 qc->tf.lbam = (nbytes & 0xFF); 2737 qc->tf.lbah = (nbytes >> 8); 2738 2739 if (nodata) 2740 qc->tf.protocol = ATAPI_PROT_NODATA; 2741 else if (using_pio) 2742 qc->tf.protocol = ATAPI_PROT_PIO; 2743 else { 2744 /* DMA data xfer */ 2745 qc->tf.protocol = ATAPI_PROT_DMA; 2746 qc->tf.feature |= ATAPI_PKT_DMA; 2747 2748 if ((dev->flags & ATA_DFLAG_DMADIR) && 2749 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2750 /* some SATA bridges need us to indicate data xfer direction */ 2751 qc->tf.feature |= ATAPI_DMADIR; 2752 } 2753 2754 2755 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2756 as ATAPI tape drives don't get this right otherwise */ 2757 return 0; 2758 } 2759 2760 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 2761 { 2762 /* 2763 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 2764 * or 2 (IDE master + slave case). However, the former case includes 2765 * libsas hosted devices which are numbered per scsi host, leading 2766 * to devno potentially being larger than 0 but with each struct 2767 * ata_device having its own struct ata_port and struct ata_link. 2768 * To accommodate these, ignore devno and always use device number 0. 2769 */ 2770 if (likely(!sata_pmp_attached(ap))) { 2771 int link_max_devices = ata_link_max_devices(&ap->link); 2772 2773 if (link_max_devices == 1) 2774 return &ap->link.device[0]; 2775 2776 if (devno < link_max_devices) 2777 return &ap->link.device[devno]; 2778 2779 return NULL; 2780 } 2781 2782 /* 2783 * For PMP-attached devices, the device number corresponds to C 2784 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 2785 * for the device. 2786 */ 2787 if (devno < ap->nr_pmp_links) 2788 return &ap->pmp_link[devno].device[0]; 2789 2790 return NULL; 2791 } 2792 2793 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2794 const struct scsi_device *scsidev) 2795 { 2796 int devno; 2797 2798 /* skip commands not addressed to targets we simulate */ 2799 if (!sata_pmp_attached(ap)) { 2800 if (unlikely(scsidev->channel || scsidev->lun)) 2801 return NULL; 2802 devno = scsidev->id; 2803 } else { 2804 if (unlikely(scsidev->id || scsidev->lun)) 2805 return NULL; 2806 devno = scsidev->channel; 2807 } 2808 2809 return ata_find_dev(ap, devno); 2810 } 2811 2812 /** 2813 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2814 * @ap: ATA port to which the device is attached 2815 * @scsidev: SCSI device from which we derive the ATA device 2816 * 2817 * Given various information provided in struct scsi_cmnd, 2818 * map that onto an ATA bus, and using that mapping 2819 * determine which ata_device is associated with the 2820 * SCSI command to be sent. 2821 * 2822 * LOCKING: 2823 * spin_lock_irqsave(host lock) 2824 * 2825 * RETURNS: 2826 * Associated ATA device, or %NULL if not found. 2827 */ 2828 struct ata_device * 2829 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2830 { 2831 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2832 2833 if (unlikely(!dev || !ata_dev_enabled(dev))) 2834 return NULL; 2835 2836 return dev; 2837 } 2838 2839 /* 2840 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2841 * @byte1: Byte 1 from pass-thru CDB. 2842 * 2843 * RETURNS: 2844 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2845 */ 2846 static u8 2847 ata_scsi_map_proto(u8 byte1) 2848 { 2849 switch((byte1 & 0x1e) >> 1) { 2850 case 3: /* Non-data */ 2851 return ATA_PROT_NODATA; 2852 2853 case 6: /* DMA */ 2854 case 10: /* UDMA Data-in */ 2855 case 11: /* UDMA Data-Out */ 2856 return ATA_PROT_DMA; 2857 2858 case 4: /* PIO Data-in */ 2859 case 5: /* PIO Data-out */ 2860 return ATA_PROT_PIO; 2861 2862 case 12: /* FPDMA */ 2863 return ATA_PROT_NCQ; 2864 2865 case 0: /* Hard Reset */ 2866 case 1: /* SRST */ 2867 case 8: /* Device Diagnostic */ 2868 case 9: /* Device Reset */ 2869 case 7: /* DMA Queued */ 2870 case 15: /* Return Response Info */ 2871 default: /* Reserved */ 2872 break; 2873 } 2874 2875 return ATA_PROT_UNKNOWN; 2876 } 2877 2878 /** 2879 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2880 * @qc: command structure to be initialized 2881 * 2882 * Handles either 12, 16, or 32-byte versions of the CDB. 2883 * 2884 * RETURNS: 2885 * Zero on success, non-zero on failure. 2886 */ 2887 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2888 { 2889 struct ata_taskfile *tf = &(qc->tf); 2890 struct scsi_cmnd *scmd = qc->scsicmd; 2891 struct ata_device *dev = qc->dev; 2892 const u8 *cdb = scmd->cmnd; 2893 u16 fp; 2894 u16 cdb_offset = 0; 2895 2896 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2897 if (cdb[0] == VARIABLE_LENGTH_CMD) 2898 cdb_offset = 9; 2899 2900 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2901 if (tf->protocol == ATA_PROT_UNKNOWN) { 2902 fp = 1; 2903 goto invalid_fld; 2904 } 2905 2906 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 2907 /* 2908 * When T_LENGTH is zero (No data is transferred), dir should 2909 * be DMA_NONE. 2910 */ 2911 if (scmd->sc_data_direction != DMA_NONE) { 2912 fp = 2 + cdb_offset; 2913 goto invalid_fld; 2914 } 2915 2916 if (ata_is_ncq(tf->protocol)) 2917 tf->protocol = ATA_PROT_NCQ_NODATA; 2918 } 2919 2920 /* enable LBA */ 2921 tf->flags |= ATA_TFLAG_LBA; 2922 2923 /* 2924 * 12 and 16 byte CDBs use different offsets to 2925 * provide the various register values. 2926 */ 2927 switch (cdb[0]) { 2928 case ATA_16: 2929 /* 2930 * 16-byte CDB - may contain extended commands. 2931 * 2932 * If that is the case, copy the upper byte register values. 2933 */ 2934 if (cdb[1] & 0x01) { 2935 tf->hob_feature = cdb[3]; 2936 tf->hob_nsect = cdb[5]; 2937 tf->hob_lbal = cdb[7]; 2938 tf->hob_lbam = cdb[9]; 2939 tf->hob_lbah = cdb[11]; 2940 tf->flags |= ATA_TFLAG_LBA48; 2941 } else 2942 tf->flags &= ~ATA_TFLAG_LBA48; 2943 2944 /* 2945 * Always copy low byte, device and command registers. 2946 */ 2947 tf->feature = cdb[4]; 2948 tf->nsect = cdb[6]; 2949 tf->lbal = cdb[8]; 2950 tf->lbam = cdb[10]; 2951 tf->lbah = cdb[12]; 2952 tf->device = cdb[13]; 2953 tf->command = cdb[14]; 2954 break; 2955 case ATA_12: 2956 /* 2957 * 12-byte CDB - incapable of extended commands. 2958 */ 2959 tf->flags &= ~ATA_TFLAG_LBA48; 2960 2961 tf->feature = cdb[3]; 2962 tf->nsect = cdb[4]; 2963 tf->lbal = cdb[5]; 2964 tf->lbam = cdb[6]; 2965 tf->lbah = cdb[7]; 2966 tf->device = cdb[8]; 2967 tf->command = cdb[9]; 2968 break; 2969 default: 2970 /* 2971 * 32-byte CDB - may contain extended command fields. 2972 * 2973 * If that is the case, copy the upper byte register values. 2974 */ 2975 if (cdb[10] & 0x01) { 2976 tf->hob_feature = cdb[20]; 2977 tf->hob_nsect = cdb[22]; 2978 tf->hob_lbal = cdb[16]; 2979 tf->hob_lbam = cdb[15]; 2980 tf->hob_lbah = cdb[14]; 2981 tf->flags |= ATA_TFLAG_LBA48; 2982 } else 2983 tf->flags &= ~ATA_TFLAG_LBA48; 2984 2985 tf->feature = cdb[21]; 2986 tf->nsect = cdb[23]; 2987 tf->lbal = cdb[19]; 2988 tf->lbam = cdb[18]; 2989 tf->lbah = cdb[17]; 2990 tf->device = cdb[24]; 2991 tf->command = cdb[25]; 2992 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2993 break; 2994 } 2995 2996 /* For NCQ commands copy the tag value */ 2997 if (ata_is_ncq(tf->protocol)) 2998 tf->nsect = qc->hw_tag << 3; 2999 3000 /* enforce correct master/slave bit */ 3001 tf->device = dev->devno ? 3002 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3003 3004 switch (tf->command) { 3005 /* READ/WRITE LONG use a non-standard sect_size */ 3006 case ATA_CMD_READ_LONG: 3007 case ATA_CMD_READ_LONG_ONCE: 3008 case ATA_CMD_WRITE_LONG: 3009 case ATA_CMD_WRITE_LONG_ONCE: 3010 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3011 fp = 1; 3012 goto invalid_fld; 3013 } 3014 qc->sect_size = scsi_bufflen(scmd); 3015 break; 3016 3017 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3018 case ATA_CMD_CFA_WRITE_NE: 3019 case ATA_CMD_CFA_TRANS_SECT: 3020 case ATA_CMD_CFA_WRITE_MULT_NE: 3021 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3022 case ATA_CMD_READ: 3023 case ATA_CMD_READ_EXT: 3024 case ATA_CMD_READ_QUEUED: 3025 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3026 case ATA_CMD_FPDMA_READ: 3027 case ATA_CMD_READ_MULTI: 3028 case ATA_CMD_READ_MULTI_EXT: 3029 case ATA_CMD_PIO_READ: 3030 case ATA_CMD_PIO_READ_EXT: 3031 case ATA_CMD_READ_STREAM_DMA_EXT: 3032 case ATA_CMD_READ_STREAM_EXT: 3033 case ATA_CMD_VERIFY: 3034 case ATA_CMD_VERIFY_EXT: 3035 case ATA_CMD_WRITE: 3036 case ATA_CMD_WRITE_EXT: 3037 case ATA_CMD_WRITE_FUA_EXT: 3038 case ATA_CMD_WRITE_QUEUED: 3039 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3040 case ATA_CMD_FPDMA_WRITE: 3041 case ATA_CMD_WRITE_MULTI: 3042 case ATA_CMD_WRITE_MULTI_EXT: 3043 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3044 case ATA_CMD_PIO_WRITE: 3045 case ATA_CMD_PIO_WRITE_EXT: 3046 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3047 case ATA_CMD_WRITE_STREAM_EXT: 3048 qc->sect_size = scmd->device->sector_size; 3049 break; 3050 3051 /* Everything else uses 512 byte "sectors" */ 3052 default: 3053 qc->sect_size = ATA_SECT_SIZE; 3054 } 3055 3056 /* 3057 * Set flags so that all registers will be written, pass on 3058 * write indication (used for PIO/DMA setup), result TF is 3059 * copied back and we don't whine too much about its failure. 3060 */ 3061 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3062 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3063 tf->flags |= ATA_TFLAG_WRITE; 3064 3065 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3066 3067 /* 3068 * Set transfer length. 3069 * 3070 * TODO: find out if we need to do more here to 3071 * cover scatter/gather case. 3072 */ 3073 ata_qc_set_pc_nbytes(qc); 3074 3075 /* We may not issue DMA commands if no DMA mode is set */ 3076 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3077 fp = 1; 3078 goto invalid_fld; 3079 } 3080 3081 /* We may not issue NCQ commands to devices not supporting NCQ */ 3082 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3083 fp = 1; 3084 goto invalid_fld; 3085 } 3086 3087 /* sanity check for pio multi commands */ 3088 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3089 fp = 1; 3090 goto invalid_fld; 3091 } 3092 3093 if (is_multi_taskfile(tf)) { 3094 unsigned int multi_count = 1 << (cdb[1] >> 5); 3095 3096 /* compare the passed through multi_count 3097 * with the cached multi_count of libata 3098 */ 3099 if (multi_count != dev->multi_count) 3100 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3101 multi_count); 3102 } 3103 3104 /* 3105 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3106 * SET_FEATURES - XFER MODE must be preceded/succeeded 3107 * by an update to hardware-specific registers for each 3108 * controller (i.e. the reason for ->set_piomode(), 3109 * ->set_dmamode(), and ->post_set_mode() hooks). 3110 */ 3111 if (tf->command == ATA_CMD_SET_FEATURES && 3112 tf->feature == SETFEATURES_XFER) { 3113 fp = (cdb[0] == ATA_16) ? 4 : 3; 3114 goto invalid_fld; 3115 } 3116 3117 /* 3118 * Filter TPM commands by default. These provide an 3119 * essentially uncontrolled encrypted "back door" between 3120 * applications and the disk. Set libata.allow_tpm=1 if you 3121 * have a real reason for wanting to use them. This ensures 3122 * that installed software cannot easily mess stuff up without 3123 * user intent. DVR type users will probably ship with this enabled 3124 * for movie content management. 3125 * 3126 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3127 * for this and should do in future but that it is not sufficient as 3128 * DCS is an optional feature set. Thus we also do the software filter 3129 * so that we comply with the TC consortium stated goal that the user 3130 * can turn off TC features of their system. 3131 */ 3132 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3133 fp = (cdb[0] == ATA_16) ? 14 : 9; 3134 goto invalid_fld; 3135 } 3136 3137 return 0; 3138 3139 invalid_fld: 3140 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3141 return 1; 3142 } 3143 3144 /** 3145 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3146 * @cmd: SCSI command being translated 3147 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3148 * @sector: Starting sector 3149 * @count: Total Range of request in logical sectors 3150 * 3151 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3152 * descriptor. 3153 * 3154 * Upto 64 entries of the format: 3155 * 63:48 Range Length 3156 * 47:0 LBA 3157 * 3158 * Range Length of 0 is ignored. 3159 * LBA's should be sorted order and not overlap. 3160 * 3161 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3162 * 3163 * Return: Number of bytes copied into sglist. 3164 */ 3165 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3166 u64 sector, u32 count) 3167 { 3168 struct scsi_device *sdp = cmd->device; 3169 size_t len = sdp->sector_size; 3170 size_t r; 3171 __le64 *buf; 3172 u32 i = 0; 3173 unsigned long flags; 3174 3175 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3176 3177 if (len > ATA_SCSI_RBUF_SIZE) 3178 len = ATA_SCSI_RBUF_SIZE; 3179 3180 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3181 buf = ((void *)ata_scsi_rbuf); 3182 memset(buf, 0, len); 3183 while (i < trmax) { 3184 u64 entry = sector | 3185 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3186 buf[i++] = __cpu_to_le64(entry); 3187 if (count <= 0xffff) 3188 break; 3189 count -= 0xffff; 3190 sector += 0xffff; 3191 } 3192 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3193 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3194 3195 return r; 3196 } 3197 3198 /** 3199 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3200 * @qc: Command to be translated 3201 * 3202 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3203 * an SCT Write Same command. 3204 * Based on WRITE SAME has the UNMAP flag: 3205 * 3206 * - When set translate to DSM TRIM 3207 * - When clear translate to SCT Write Same 3208 */ 3209 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3210 { 3211 struct ata_taskfile *tf = &qc->tf; 3212 struct scsi_cmnd *scmd = qc->scsicmd; 3213 struct scsi_device *sdp = scmd->device; 3214 size_t len = sdp->sector_size; 3215 struct ata_device *dev = qc->dev; 3216 const u8 *cdb = scmd->cmnd; 3217 u64 block; 3218 u32 n_block; 3219 const u32 trmax = len >> 3; 3220 u32 size; 3221 u16 fp; 3222 u8 bp = 0xff; 3223 u8 unmap = cdb[1] & 0x8; 3224 3225 /* we may not issue DMA commands if no DMA mode is set */ 3226 if (unlikely(!ata_dma_enabled(dev))) 3227 goto invalid_opcode; 3228 3229 /* 3230 * We only allow sending this command through the block layer, 3231 * as it modifies the DATA OUT buffer, which would corrupt user 3232 * memory for SG_IO commands. 3233 */ 3234 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3235 goto invalid_opcode; 3236 3237 if (unlikely(scmd->cmd_len < 16)) { 3238 fp = 15; 3239 goto invalid_fld; 3240 } 3241 scsi_16_lba_len(cdb, &block, &n_block); 3242 3243 if (!unmap || 3244 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3245 !ata_id_has_trim(dev->id)) { 3246 fp = 1; 3247 bp = 3; 3248 goto invalid_fld; 3249 } 3250 /* If the request is too large the cmd is invalid */ 3251 if (n_block > 0xffff * trmax) { 3252 fp = 2; 3253 goto invalid_fld; 3254 } 3255 3256 /* 3257 * WRITE SAME always has a sector sized buffer as payload, this 3258 * should never be a multiple entry S/G list. 3259 */ 3260 if (!scsi_sg_count(scmd)) 3261 goto invalid_param_len; 3262 3263 /* 3264 * size must match sector size in bytes 3265 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3266 * is defined as number of 512 byte blocks to be transferred. 3267 */ 3268 3269 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3270 if (size != len) 3271 goto invalid_param_len; 3272 3273 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3274 /* Newer devices support queued TRIM commands */ 3275 tf->protocol = ATA_PROT_NCQ; 3276 tf->command = ATA_CMD_FPDMA_SEND; 3277 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3278 tf->nsect = qc->hw_tag << 3; 3279 tf->hob_feature = (size / 512) >> 8; 3280 tf->feature = size / 512; 3281 3282 tf->auxiliary = 1; 3283 } else { 3284 tf->protocol = ATA_PROT_DMA; 3285 tf->hob_feature = 0; 3286 tf->feature = ATA_DSM_TRIM; 3287 tf->hob_nsect = (size / 512) >> 8; 3288 tf->nsect = size / 512; 3289 tf->command = ATA_CMD_DSM; 3290 } 3291 3292 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3293 ATA_TFLAG_WRITE; 3294 3295 ata_qc_set_pc_nbytes(qc); 3296 3297 return 0; 3298 3299 invalid_fld: 3300 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3301 return 1; 3302 invalid_param_len: 3303 /* "Parameter list length error" */ 3304 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3305 return 1; 3306 invalid_opcode: 3307 /* "Invalid command operation code" */ 3308 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3309 return 1; 3310 } 3311 3312 /** 3313 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3314 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3315 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3316 * 3317 * Yields a subset to satisfy scsi_report_opcode() 3318 * 3319 * LOCKING: 3320 * spin_lock_irqsave(host lock) 3321 */ 3322 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3323 { 3324 struct ata_device *dev = args->dev; 3325 u8 *cdb = args->cmd->cmnd; 3326 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3327 unsigned int err = 0; 3328 3329 if (cdb[2] != 1 && cdb[2] != 3) { 3330 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3331 err = 2; 3332 goto out; 3333 } 3334 3335 switch (cdb[3]) { 3336 case INQUIRY: 3337 case MODE_SENSE: 3338 case MODE_SENSE_10: 3339 case READ_CAPACITY: 3340 case SERVICE_ACTION_IN_16: 3341 case REPORT_LUNS: 3342 case REQUEST_SENSE: 3343 case SYNCHRONIZE_CACHE: 3344 case SYNCHRONIZE_CACHE_16: 3345 case REZERO_UNIT: 3346 case SEEK_6: 3347 case SEEK_10: 3348 case TEST_UNIT_READY: 3349 case SEND_DIAGNOSTIC: 3350 case MAINTENANCE_IN: 3351 case READ_6: 3352 case READ_10: 3353 case WRITE_6: 3354 case WRITE_10: 3355 case ATA_12: 3356 case ATA_16: 3357 case VERIFY: 3358 case VERIFY_16: 3359 case MODE_SELECT: 3360 case MODE_SELECT_10: 3361 case START_STOP: 3362 supported = 3; 3363 break; 3364 case READ_16: 3365 supported = 3; 3366 if (dev->flags & ATA_DFLAG_CDL) { 3367 /* 3368 * CDL read descriptors map to the T2A page, that is, 3369 * rwcdlp = 0x01 and cdlp = 0x01 3370 */ 3371 rwcdlp = 0x01; 3372 cdlp = 0x01 << 3; 3373 } 3374 break; 3375 case WRITE_16: 3376 supported = 3; 3377 if (dev->flags & ATA_DFLAG_CDL) { 3378 /* 3379 * CDL write descriptors map to the T2B page, that is, 3380 * rwcdlp = 0x01 and cdlp = 0x02 3381 */ 3382 rwcdlp = 0x01; 3383 cdlp = 0x02 << 3; 3384 } 3385 break; 3386 case ZBC_IN: 3387 case ZBC_OUT: 3388 if (ata_id_zoned_cap(dev->id) || 3389 dev->class == ATA_DEV_ZAC) 3390 supported = 3; 3391 break; 3392 case SECURITY_PROTOCOL_IN: 3393 case SECURITY_PROTOCOL_OUT: 3394 if (dev->flags & ATA_DFLAG_TRUSTED) 3395 supported = 3; 3396 break; 3397 default: 3398 break; 3399 } 3400 out: 3401 /* One command format */ 3402 rbuf[0] = rwcdlp; 3403 rbuf[1] = cdlp | supported; 3404 return err; 3405 } 3406 3407 /** 3408 * ata_scsi_report_zones_complete - convert ATA output 3409 * @qc: command structure returning the data 3410 * 3411 * Convert T-13 little-endian field representation into 3412 * T-10 big-endian field representation. 3413 * What a mess. 3414 */ 3415 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3416 { 3417 struct scsi_cmnd *scmd = qc->scsicmd; 3418 struct sg_mapping_iter miter; 3419 unsigned long flags; 3420 unsigned int bytes = 0; 3421 3422 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3423 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3424 3425 local_irq_save(flags); 3426 while (sg_miter_next(&miter)) { 3427 unsigned int offset = 0; 3428 3429 if (bytes == 0) { 3430 char *hdr; 3431 u32 list_length; 3432 u64 max_lba, opt_lba; 3433 u16 same; 3434 3435 /* Swizzle header */ 3436 hdr = miter.addr; 3437 list_length = get_unaligned_le32(&hdr[0]); 3438 same = get_unaligned_le16(&hdr[4]); 3439 max_lba = get_unaligned_le64(&hdr[8]); 3440 opt_lba = get_unaligned_le64(&hdr[16]); 3441 put_unaligned_be32(list_length, &hdr[0]); 3442 hdr[4] = same & 0xf; 3443 put_unaligned_be64(max_lba, &hdr[8]); 3444 put_unaligned_be64(opt_lba, &hdr[16]); 3445 offset += 64; 3446 bytes += 64; 3447 } 3448 while (offset < miter.length) { 3449 char *rec; 3450 u8 cond, type, non_seq, reset; 3451 u64 size, start, wp; 3452 3453 /* Swizzle zone descriptor */ 3454 rec = miter.addr + offset; 3455 type = rec[0] & 0xf; 3456 cond = (rec[1] >> 4) & 0xf; 3457 non_seq = (rec[1] & 2); 3458 reset = (rec[1] & 1); 3459 size = get_unaligned_le64(&rec[8]); 3460 start = get_unaligned_le64(&rec[16]); 3461 wp = get_unaligned_le64(&rec[24]); 3462 rec[0] = type; 3463 rec[1] = (cond << 4) | non_seq | reset; 3464 put_unaligned_be64(size, &rec[8]); 3465 put_unaligned_be64(start, &rec[16]); 3466 put_unaligned_be64(wp, &rec[24]); 3467 WARN_ON(offset + 64 > miter.length); 3468 offset += 64; 3469 bytes += 64; 3470 } 3471 } 3472 sg_miter_stop(&miter); 3473 local_irq_restore(flags); 3474 3475 ata_scsi_qc_complete(qc); 3476 } 3477 3478 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3479 { 3480 struct ata_taskfile *tf = &qc->tf; 3481 struct scsi_cmnd *scmd = qc->scsicmd; 3482 const u8 *cdb = scmd->cmnd; 3483 u16 sect, fp = (u16)-1; 3484 u8 sa, options, bp = 0xff; 3485 u64 block; 3486 u32 n_block; 3487 3488 if (unlikely(scmd->cmd_len < 16)) { 3489 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3490 scmd->cmd_len); 3491 fp = 15; 3492 goto invalid_fld; 3493 } 3494 scsi_16_lba_len(cdb, &block, &n_block); 3495 if (n_block != scsi_bufflen(scmd)) { 3496 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3497 n_block, scsi_bufflen(scmd)); 3498 goto invalid_param_len; 3499 } 3500 sa = cdb[1] & 0x1f; 3501 if (sa != ZI_REPORT_ZONES) { 3502 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3503 fp = 1; 3504 goto invalid_fld; 3505 } 3506 /* 3507 * ZAC allows only for transfers in 512 byte blocks, 3508 * and uses a 16 bit value for the transfer count. 3509 */ 3510 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3511 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3512 goto invalid_param_len; 3513 } 3514 sect = n_block / 512; 3515 options = cdb[14] & 0xbf; 3516 3517 if (ata_ncq_enabled(qc->dev) && 3518 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3519 tf->protocol = ATA_PROT_NCQ; 3520 tf->command = ATA_CMD_FPDMA_RECV; 3521 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3522 tf->nsect = qc->hw_tag << 3; 3523 tf->feature = sect & 0xff; 3524 tf->hob_feature = (sect >> 8) & 0xff; 3525 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3526 } else { 3527 tf->command = ATA_CMD_ZAC_MGMT_IN; 3528 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3529 tf->protocol = ATA_PROT_DMA; 3530 tf->hob_feature = options; 3531 tf->hob_nsect = (sect >> 8) & 0xff; 3532 tf->nsect = sect & 0xff; 3533 } 3534 tf->device = ATA_LBA; 3535 tf->lbah = (block >> 16) & 0xff; 3536 tf->lbam = (block >> 8) & 0xff; 3537 tf->lbal = block & 0xff; 3538 tf->hob_lbah = (block >> 40) & 0xff; 3539 tf->hob_lbam = (block >> 32) & 0xff; 3540 tf->hob_lbal = (block >> 24) & 0xff; 3541 3542 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3543 qc->flags |= ATA_QCFLAG_RESULT_TF; 3544 3545 ata_qc_set_pc_nbytes(qc); 3546 3547 qc->complete_fn = ata_scsi_report_zones_complete; 3548 3549 return 0; 3550 3551 invalid_fld: 3552 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3553 return 1; 3554 3555 invalid_param_len: 3556 /* "Parameter list length error" */ 3557 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3558 return 1; 3559 } 3560 3561 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3562 { 3563 struct ata_taskfile *tf = &qc->tf; 3564 struct scsi_cmnd *scmd = qc->scsicmd; 3565 struct ata_device *dev = qc->dev; 3566 const u8 *cdb = scmd->cmnd; 3567 u8 all, sa; 3568 u64 block; 3569 u32 n_block; 3570 u16 fp = (u16)-1; 3571 3572 if (unlikely(scmd->cmd_len < 16)) { 3573 fp = 15; 3574 goto invalid_fld; 3575 } 3576 3577 sa = cdb[1] & 0x1f; 3578 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3579 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3580 fp = 1; 3581 goto invalid_fld; 3582 } 3583 3584 scsi_16_lba_len(cdb, &block, &n_block); 3585 if (n_block) { 3586 /* 3587 * ZAC MANAGEMENT OUT doesn't define any length 3588 */ 3589 goto invalid_param_len; 3590 } 3591 3592 all = cdb[14] & 0x1; 3593 if (all) { 3594 /* 3595 * Ignore the block address (zone ID) as defined by ZBC. 3596 */ 3597 block = 0; 3598 } else if (block >= dev->n_sectors) { 3599 /* 3600 * Block must be a valid zone ID (a zone start LBA). 3601 */ 3602 fp = 2; 3603 goto invalid_fld; 3604 } 3605 3606 if (ata_ncq_enabled(qc->dev) && 3607 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3608 tf->protocol = ATA_PROT_NCQ_NODATA; 3609 tf->command = ATA_CMD_NCQ_NON_DATA; 3610 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3611 tf->nsect = qc->hw_tag << 3; 3612 tf->auxiliary = sa | ((u16)all << 8); 3613 } else { 3614 tf->protocol = ATA_PROT_NODATA; 3615 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3616 tf->feature = sa; 3617 tf->hob_feature = all; 3618 } 3619 tf->lbah = (block >> 16) & 0xff; 3620 tf->lbam = (block >> 8) & 0xff; 3621 tf->lbal = block & 0xff; 3622 tf->hob_lbah = (block >> 40) & 0xff; 3623 tf->hob_lbam = (block >> 32) & 0xff; 3624 tf->hob_lbal = (block >> 24) & 0xff; 3625 tf->device = ATA_LBA; 3626 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3627 3628 return 0; 3629 3630 invalid_fld: 3631 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3632 return 1; 3633 invalid_param_len: 3634 /* "Parameter list length error" */ 3635 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3636 return 1; 3637 } 3638 3639 /** 3640 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3641 * @qc: Storage for translated ATA taskfile 3642 * @buf: input buffer 3643 * @len: number of valid bytes in the input buffer 3644 * @fp: out parameter for the failed field on error 3645 * 3646 * Prepare a taskfile to modify caching information for the device. 3647 * 3648 * LOCKING: 3649 * None. 3650 */ 3651 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3652 const u8 *buf, int len, u16 *fp) 3653 { 3654 struct ata_taskfile *tf = &qc->tf; 3655 struct ata_device *dev = qc->dev; 3656 u8 mpage[CACHE_MPAGE_LEN]; 3657 u8 wce; 3658 int i; 3659 3660 /* 3661 * The first two bytes of def_cache_mpage are a header, so offsets 3662 * in mpage are off by 2 compared to buf. Same for len. 3663 */ 3664 3665 if (len != CACHE_MPAGE_LEN - 2) { 3666 *fp = min(len, CACHE_MPAGE_LEN - 2); 3667 return -EINVAL; 3668 } 3669 3670 wce = buf[0] & (1 << 2); 3671 3672 /* 3673 * Check that read-only bits are not modified. 3674 */ 3675 ata_msense_caching(dev->id, mpage, false); 3676 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3677 if (i == 0) 3678 continue; 3679 if (mpage[i + 2] != buf[i]) { 3680 *fp = i; 3681 return -EINVAL; 3682 } 3683 } 3684 3685 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3686 tf->protocol = ATA_PROT_NODATA; 3687 tf->nsect = 0; 3688 tf->command = ATA_CMD_SET_FEATURES; 3689 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3690 return 0; 3691 } 3692 3693 /* 3694 * Simulate MODE SELECT control mode page, sub-page 0. 3695 */ 3696 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3697 const u8 *buf, int len, u16 *fp) 3698 { 3699 struct ata_device *dev = qc->dev; 3700 u8 mpage[CONTROL_MPAGE_LEN]; 3701 u8 d_sense; 3702 int i; 3703 3704 /* 3705 * The first two bytes of def_control_mpage are a header, so offsets 3706 * in mpage are off by 2 compared to buf. Same for len. 3707 */ 3708 3709 if (len != CONTROL_MPAGE_LEN - 2) { 3710 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3711 return -EINVAL; 3712 } 3713 3714 d_sense = buf[0] & (1 << 2); 3715 3716 /* 3717 * Check that read-only bits are not modified. 3718 */ 3719 ata_msense_control_spg0(dev, mpage, false); 3720 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3721 if (i == 0) 3722 continue; 3723 if (mpage[2 + i] != buf[i]) { 3724 *fp = i; 3725 return -EINVAL; 3726 } 3727 } 3728 if (d_sense & (1 << 2)) 3729 dev->flags |= ATA_DFLAG_D_SENSE; 3730 else 3731 dev->flags &= ~ATA_DFLAG_D_SENSE; 3732 return 0; 3733 } 3734 3735 /* 3736 * Translate MODE SELECT control mode page, sub-pages f2h (ATA feature mode 3737 * page) into a SET FEATURES command. 3738 */ 3739 static unsigned int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 3740 const u8 *buf, int len, 3741 u16 *fp) 3742 { 3743 struct ata_device *dev = qc->dev; 3744 struct ata_taskfile *tf = &qc->tf; 3745 u8 cdl_action; 3746 3747 /* 3748 * The first four bytes of ATA Feature Control mode page are a header, 3749 * so offsets in mpage are off by 4 compared to buf. Same for len. 3750 */ 3751 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 3752 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 3753 return -EINVAL; 3754 } 3755 3756 /* Check cdl_ctrl */ 3757 switch (buf[0] & 0x03) { 3758 case 0: 3759 /* Disable CDL */ 3760 cdl_action = 0; 3761 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 3762 break; 3763 case 0x02: 3764 /* Enable CDL T2A/T2B: NCQ priority must be disabled */ 3765 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 3766 ata_dev_err(dev, 3767 "NCQ priority must be disabled to enable CDL\n"); 3768 return -EINVAL; 3769 } 3770 cdl_action = 1; 3771 dev->flags |= ATA_DFLAG_CDL_ENABLED; 3772 break; 3773 default: 3774 *fp = 0; 3775 return -EINVAL; 3776 } 3777 3778 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3779 tf->protocol = ATA_PROT_NODATA; 3780 tf->command = ATA_CMD_SET_FEATURES; 3781 tf->feature = SETFEATURES_CDL; 3782 tf->nsect = cdl_action; 3783 3784 return 1; 3785 } 3786 3787 /** 3788 * ata_mselect_control - Simulate MODE SELECT for control page 3789 * @qc: Storage for translated ATA taskfile 3790 * @spg: target sub-page of the control page 3791 * @buf: input buffer 3792 * @len: number of valid bytes in the input buffer 3793 * @fp: out parameter for the failed field on error 3794 * 3795 * Prepare a taskfile to modify caching information for the device. 3796 * 3797 * LOCKING: 3798 * None. 3799 */ 3800 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 3801 const u8 *buf, int len, u16 *fp) 3802 { 3803 switch (spg) { 3804 case 0: 3805 return ata_mselect_control_spg0(qc, buf, len, fp); 3806 case ATA_FEATURE_SUB_MPAGE: 3807 return ata_mselect_control_ata_feature(qc, buf, len, fp); 3808 default: 3809 return -EINVAL; 3810 } 3811 } 3812 3813 /** 3814 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3815 * @qc: Storage for translated ATA taskfile 3816 * 3817 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3818 * Assume this is invoked for direct access devices (e.g. disks) only. 3819 * There should be no block descriptor for other device types. 3820 * 3821 * LOCKING: 3822 * spin_lock_irqsave(host lock) 3823 */ 3824 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3825 { 3826 struct scsi_cmnd *scmd = qc->scsicmd; 3827 const u8 *cdb = scmd->cmnd; 3828 u8 pg, spg; 3829 unsigned six_byte, pg_len, hdr_len, bd_len; 3830 int len, ret; 3831 u16 fp = (u16)-1; 3832 u8 bp = 0xff; 3833 u8 buffer[64]; 3834 const u8 *p = buffer; 3835 3836 six_byte = (cdb[0] == MODE_SELECT); 3837 if (six_byte) { 3838 if (scmd->cmd_len < 5) { 3839 fp = 4; 3840 goto invalid_fld; 3841 } 3842 3843 len = cdb[4]; 3844 hdr_len = 4; 3845 } else { 3846 if (scmd->cmd_len < 9) { 3847 fp = 8; 3848 goto invalid_fld; 3849 } 3850 3851 len = get_unaligned_be16(&cdb[7]); 3852 hdr_len = 8; 3853 } 3854 3855 /* We only support PF=1, SP=0. */ 3856 if ((cdb[1] & 0x11) != 0x10) { 3857 fp = 1; 3858 bp = (cdb[1] & 0x01) ? 1 : 5; 3859 goto invalid_fld; 3860 } 3861 3862 /* Test early for possible overrun. */ 3863 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3864 goto invalid_param_len; 3865 3866 /* Move past header and block descriptors. */ 3867 if (len < hdr_len) 3868 goto invalid_param_len; 3869 3870 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3871 buffer, sizeof(buffer))) 3872 goto invalid_param_len; 3873 3874 if (six_byte) 3875 bd_len = p[3]; 3876 else 3877 bd_len = get_unaligned_be16(&p[6]); 3878 3879 len -= hdr_len; 3880 p += hdr_len; 3881 if (len < bd_len) 3882 goto invalid_param_len; 3883 if (bd_len != 0 && bd_len != 8) { 3884 fp = (six_byte) ? 3 : 6; 3885 fp += bd_len + hdr_len; 3886 goto invalid_param; 3887 } 3888 3889 len -= bd_len; 3890 p += bd_len; 3891 if (len == 0) 3892 goto skip; 3893 3894 /* Parse both possible formats for the mode page headers. */ 3895 pg = p[0] & 0x3f; 3896 if (p[0] & 0x40) { 3897 if (len < 4) 3898 goto invalid_param_len; 3899 3900 spg = p[1]; 3901 pg_len = get_unaligned_be16(&p[2]); 3902 p += 4; 3903 len -= 4; 3904 } else { 3905 if (len < 2) 3906 goto invalid_param_len; 3907 3908 spg = 0; 3909 pg_len = p[1]; 3910 p += 2; 3911 len -= 2; 3912 } 3913 3914 /* 3915 * Supported subpages: all subpages and ATA feature sub-page f2h of 3916 * the control page. 3917 */ 3918 if (spg) { 3919 switch (spg) { 3920 case ALL_SUB_MPAGES: 3921 /* All subpages is not supported for the control page */ 3922 if (pg == CONTROL_MPAGE) { 3923 fp = (p[0] & 0x40) ? 1 : 0; 3924 fp += hdr_len + bd_len; 3925 goto invalid_param; 3926 } 3927 break; 3928 case ATA_FEATURE_SUB_MPAGE: 3929 if (qc->dev->flags & ATA_DFLAG_CDL && 3930 pg == CONTROL_MPAGE) 3931 break; 3932 fallthrough; 3933 default: 3934 fp = (p[0] & 0x40) ? 1 : 0; 3935 fp += hdr_len + bd_len; 3936 goto invalid_param; 3937 } 3938 } 3939 if (pg_len > len) 3940 goto invalid_param_len; 3941 3942 switch (pg) { 3943 case CACHE_MPAGE: 3944 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3945 fp += hdr_len + bd_len; 3946 goto invalid_param; 3947 } 3948 break; 3949 case CONTROL_MPAGE: 3950 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 3951 if (ret < 0) { 3952 fp += hdr_len + bd_len; 3953 goto invalid_param; 3954 } 3955 if (!ret) 3956 goto skip; /* No ATA command to send */ 3957 break; 3958 default: 3959 /* Invalid page code */ 3960 fp = bd_len + hdr_len; 3961 goto invalid_param; 3962 } 3963 3964 /* 3965 * Only one page has changeable data, so we only support setting one 3966 * page at a time. 3967 */ 3968 if (len > pg_len) 3969 goto invalid_param; 3970 3971 return 0; 3972 3973 invalid_fld: 3974 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3975 return 1; 3976 3977 invalid_param: 3978 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3979 return 1; 3980 3981 invalid_param_len: 3982 /* "Parameter list length error" */ 3983 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3984 return 1; 3985 3986 skip: 3987 scmd->result = SAM_STAT_GOOD; 3988 return 1; 3989 } 3990 3991 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3992 { 3993 if (len == 0) 3994 return ATA_CMD_TRUSTED_NONDATA; 3995 else if (send) 3996 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 3997 else 3998 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 3999 } 4000 4001 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4002 { 4003 struct scsi_cmnd *scmd = qc->scsicmd; 4004 const u8 *cdb = scmd->cmnd; 4005 struct ata_taskfile *tf = &qc->tf; 4006 u8 secp = cdb[1]; 4007 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4008 u16 spsp = get_unaligned_be16(&cdb[2]); 4009 u32 len = get_unaligned_be32(&cdb[6]); 4010 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4011 4012 /* 4013 * We don't support the ATA "security" protocol. 4014 */ 4015 if (secp == 0xef) { 4016 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4017 return 1; 4018 } 4019 4020 if (cdb[4] & 7) { /* INC_512 */ 4021 if (len > 0xffff) { 4022 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4023 return 1; 4024 } 4025 } else { 4026 if (len > 0x01fffe00) { 4027 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4028 return 1; 4029 } 4030 4031 /* convert to the sector-based ATA addressing */ 4032 len = (len + 511) / 512; 4033 } 4034 4035 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4036 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4037 if (send) 4038 tf->flags |= ATA_TFLAG_WRITE; 4039 tf->command = ata_scsi_trusted_op(len, send, dma); 4040 tf->feature = secp; 4041 tf->lbam = spsp & 0xff; 4042 tf->lbah = spsp >> 8; 4043 4044 if (len) { 4045 tf->nsect = len & 0xff; 4046 tf->lbal = len >> 8; 4047 } else { 4048 if (!send) 4049 tf->lbah = (1 << 7); 4050 } 4051 4052 ata_qc_set_pc_nbytes(qc); 4053 return 0; 4054 } 4055 4056 /** 4057 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4058 * @qc: Command to be translated 4059 * 4060 * Translate a SCSI variable length CDB to specified commands. 4061 * It checks a service action value in CDB to call corresponding handler. 4062 * 4063 * RETURNS: 4064 * Zero on success, non-zero on failure 4065 * 4066 */ 4067 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4068 { 4069 struct scsi_cmnd *scmd = qc->scsicmd; 4070 const u8 *cdb = scmd->cmnd; 4071 const u16 sa = get_unaligned_be16(&cdb[8]); 4072 4073 /* 4074 * if service action represents a ata pass-thru(32) command, 4075 * then pass it to ata_scsi_pass_thru handler. 4076 */ 4077 if (sa == ATA_32) 4078 return ata_scsi_pass_thru(qc); 4079 4080 /* unsupported service action */ 4081 return 1; 4082 } 4083 4084 /** 4085 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4086 * @dev: ATA device 4087 * @cmd: SCSI command opcode to consider 4088 * 4089 * Look up the SCSI command given, and determine whether the 4090 * SCSI command is to be translated or simulated. 4091 * 4092 * RETURNS: 4093 * Pointer to translation function if possible, %NULL if not. 4094 */ 4095 4096 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4097 { 4098 switch (cmd) { 4099 case READ_6: 4100 case READ_10: 4101 case READ_16: 4102 4103 case WRITE_6: 4104 case WRITE_10: 4105 case WRITE_16: 4106 return ata_scsi_rw_xlat; 4107 4108 case WRITE_SAME_16: 4109 return ata_scsi_write_same_xlat; 4110 4111 case SYNCHRONIZE_CACHE: 4112 case SYNCHRONIZE_CACHE_16: 4113 if (ata_try_flush_cache(dev)) 4114 return ata_scsi_flush_xlat; 4115 break; 4116 4117 case VERIFY: 4118 case VERIFY_16: 4119 return ata_scsi_verify_xlat; 4120 4121 case ATA_12: 4122 case ATA_16: 4123 return ata_scsi_pass_thru; 4124 4125 case VARIABLE_LENGTH_CMD: 4126 return ata_scsi_var_len_cdb_xlat; 4127 4128 case MODE_SELECT: 4129 case MODE_SELECT_10: 4130 return ata_scsi_mode_select_xlat; 4131 4132 case ZBC_IN: 4133 return ata_scsi_zbc_in_xlat; 4134 4135 case ZBC_OUT: 4136 return ata_scsi_zbc_out_xlat; 4137 4138 case SECURITY_PROTOCOL_IN: 4139 case SECURITY_PROTOCOL_OUT: 4140 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4141 break; 4142 return ata_scsi_security_inout_xlat; 4143 4144 case START_STOP: 4145 return ata_scsi_start_stop_xlat; 4146 } 4147 4148 return NULL; 4149 } 4150 4151 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4152 { 4153 struct ata_port *ap = dev->link->ap; 4154 u8 scsi_op = scmd->cmnd[0]; 4155 ata_xlat_func_t xlat_func; 4156 4157 /* 4158 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4159 * However, this check is done without holding the ap->lock (a libata 4160 * specific lock), so we can have received an error irq since then, 4161 * therefore we must check if EH is pending, while holding ap->lock. 4162 */ 4163 if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) 4164 return SCSI_MLQUEUE_DEVICE_BUSY; 4165 4166 if (unlikely(!scmd->cmd_len)) 4167 goto bad_cdb_len; 4168 4169 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4170 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4171 goto bad_cdb_len; 4172 4173 xlat_func = ata_get_xlat_func(dev, scsi_op); 4174 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4175 /* relay SCSI command to ATAPI device */ 4176 int len = COMMAND_SIZE(scsi_op); 4177 4178 if (unlikely(len > scmd->cmd_len || 4179 len > dev->cdb_len || 4180 scmd->cmd_len > ATAPI_CDB_LEN)) 4181 goto bad_cdb_len; 4182 4183 xlat_func = atapi_xlat; 4184 } else { 4185 /* ATA_16 passthru, treat as an ATA command */ 4186 if (unlikely(scmd->cmd_len > 16)) 4187 goto bad_cdb_len; 4188 4189 xlat_func = ata_get_xlat_func(dev, scsi_op); 4190 } 4191 4192 if (xlat_func) 4193 return ata_scsi_translate(dev, scmd, xlat_func); 4194 4195 ata_scsi_simulate(dev, scmd); 4196 4197 return 0; 4198 4199 bad_cdb_len: 4200 scmd->result = DID_ERROR << 16; 4201 scsi_done(scmd); 4202 return 0; 4203 } 4204 4205 /** 4206 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4207 * @shost: SCSI host of command to be sent 4208 * @cmd: SCSI command to be sent 4209 * 4210 * In some cases, this function translates SCSI commands into 4211 * ATA taskfiles, and queues the taskfiles to be sent to 4212 * hardware. In other cases, this function simulates a 4213 * SCSI device by evaluating and responding to certain 4214 * SCSI commands. This creates the overall effect of 4215 * ATA and ATAPI devices appearing as SCSI devices. 4216 * 4217 * LOCKING: 4218 * ATA host lock 4219 * 4220 * RETURNS: 4221 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4222 * 0 otherwise. 4223 */ 4224 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4225 { 4226 struct ata_port *ap; 4227 struct ata_device *dev; 4228 struct scsi_device *scsidev = cmd->device; 4229 int rc = 0; 4230 unsigned long irq_flags; 4231 4232 ap = ata_shost_to_port(shost); 4233 4234 spin_lock_irqsave(ap->lock, irq_flags); 4235 4236 dev = ata_scsi_find_dev(ap, scsidev); 4237 if (likely(dev)) 4238 rc = __ata_scsi_queuecmd(cmd, dev); 4239 else { 4240 cmd->result = (DID_BAD_TARGET << 16); 4241 scsi_done(cmd); 4242 } 4243 4244 spin_unlock_irqrestore(ap->lock, irq_flags); 4245 4246 return rc; 4247 } 4248 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4249 4250 /** 4251 * ata_scsi_simulate - simulate SCSI command on ATA device 4252 * @dev: the target device 4253 * @cmd: SCSI command being sent to device. 4254 * 4255 * Interprets and directly executes a select list of SCSI commands 4256 * that can be handled internally. 4257 * 4258 * LOCKING: 4259 * spin_lock_irqsave(host lock) 4260 */ 4261 4262 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4263 { 4264 struct ata_scsi_args args; 4265 const u8 *scsicmd = cmd->cmnd; 4266 u8 tmp8; 4267 4268 args.dev = dev; 4269 args.id = dev->id; 4270 args.cmd = cmd; 4271 4272 switch(scsicmd[0]) { 4273 case INQUIRY: 4274 if (scsicmd[1] & 2) /* is CmdDt set? */ 4275 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4276 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4277 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4278 else switch (scsicmd[2]) { 4279 case 0x00: 4280 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4281 break; 4282 case 0x80: 4283 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4284 break; 4285 case 0x83: 4286 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4287 break; 4288 case 0x89: 4289 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4290 break; 4291 case 0xb0: 4292 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4293 break; 4294 case 0xb1: 4295 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4296 break; 4297 case 0xb2: 4298 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4299 break; 4300 case 0xb6: 4301 if (dev->flags & ATA_DFLAG_ZAC) 4302 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4303 else 4304 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4305 break; 4306 case 0xb9: 4307 if (dev->cpr_log) 4308 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4309 else 4310 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4311 break; 4312 default: 4313 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4314 break; 4315 } 4316 break; 4317 4318 case MODE_SENSE: 4319 case MODE_SENSE_10: 4320 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4321 break; 4322 4323 case READ_CAPACITY: 4324 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4325 break; 4326 4327 case SERVICE_ACTION_IN_16: 4328 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4329 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4330 else 4331 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4332 break; 4333 4334 case REPORT_LUNS: 4335 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4336 break; 4337 4338 case REQUEST_SENSE: 4339 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4340 break; 4341 4342 /* if we reach this, then writeback caching is disabled, 4343 * turning this into a no-op. 4344 */ 4345 case SYNCHRONIZE_CACHE: 4346 case SYNCHRONIZE_CACHE_16: 4347 fallthrough; 4348 4349 /* no-op's, complete with success */ 4350 case REZERO_UNIT: 4351 case SEEK_6: 4352 case SEEK_10: 4353 case TEST_UNIT_READY: 4354 break; 4355 4356 case SEND_DIAGNOSTIC: 4357 tmp8 = scsicmd[1] & ~(1 << 3); 4358 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4359 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4360 break; 4361 4362 case MAINTENANCE_IN: 4363 if ((scsicmd[1] & 0x1f) == MI_REPORT_SUPPORTED_OPERATION_CODES) 4364 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4365 else 4366 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4367 break; 4368 4369 /* all other commands */ 4370 default: 4371 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4372 /* "Invalid command operation code" */ 4373 break; 4374 } 4375 4376 scsi_done(cmd); 4377 } 4378 4379 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4380 { 4381 int i, rc; 4382 4383 for (i = 0; i < host->n_ports; i++) { 4384 struct ata_port *ap = host->ports[i]; 4385 struct Scsi_Host *shost; 4386 4387 rc = -ENOMEM; 4388 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4389 if (!shost) 4390 goto err_alloc; 4391 4392 shost->eh_noresume = 1; 4393 *(struct ata_port **)&shost->hostdata[0] = ap; 4394 ap->scsi_host = shost; 4395 4396 shost->transportt = ata_scsi_transport_template; 4397 shost->unique_id = ap->print_id; 4398 shost->max_id = 16; 4399 shost->max_lun = 1; 4400 shost->max_channel = 1; 4401 shost->max_cmd_len = 32; 4402 4403 /* Schedule policy is determined by ->qc_defer() 4404 * callback and it needs to see every deferred qc. 4405 * Set host_blocked to 1 to prevent SCSI midlayer from 4406 * automatically deferring requests. 4407 */ 4408 shost->max_host_blocked = 1; 4409 4410 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4411 if (rc) 4412 goto err_alloc; 4413 } 4414 4415 return 0; 4416 4417 err_alloc: 4418 while (--i >= 0) { 4419 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4420 4421 /* scsi_host_put() is in ata_devres_release() */ 4422 scsi_remove_host(shost); 4423 } 4424 return rc; 4425 } 4426 4427 #ifdef CONFIG_OF 4428 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4429 { 4430 struct scsi_device *sdev = dev->sdev; 4431 struct device *d = ap->host->dev; 4432 struct device_node *np = d->of_node; 4433 struct device_node *child; 4434 4435 for_each_available_child_of_node(np, child) { 4436 int ret; 4437 u32 val; 4438 4439 ret = of_property_read_u32(child, "reg", &val); 4440 if (ret) 4441 continue; 4442 if (val == dev->devno) { 4443 dev_dbg(d, "found matching device node\n"); 4444 sdev->sdev_gendev.of_node = child; 4445 return; 4446 } 4447 } 4448 } 4449 #else 4450 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4451 { 4452 } 4453 #endif 4454 4455 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4456 { 4457 int tries = 5; 4458 struct ata_device *last_failed_dev = NULL; 4459 struct ata_link *link; 4460 struct ata_device *dev; 4461 4462 repeat: 4463 ata_for_each_link(link, ap, EDGE) { 4464 ata_for_each_dev(dev, link, ENABLED) { 4465 struct scsi_device *sdev; 4466 int channel = 0, id = 0; 4467 4468 if (dev->sdev) 4469 continue; 4470 4471 if (ata_is_host_link(link)) 4472 id = dev->devno; 4473 else 4474 channel = link->pmp; 4475 4476 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4477 NULL); 4478 if (!IS_ERR(sdev)) { 4479 dev->sdev = sdev; 4480 ata_scsi_assign_ofnode(dev, ap); 4481 scsi_device_put(sdev); 4482 } else { 4483 dev->sdev = NULL; 4484 } 4485 } 4486 } 4487 4488 /* If we scanned while EH was in progress or allocation 4489 * failure occurred, scan would have failed silently. Check 4490 * whether all devices are attached. 4491 */ 4492 ata_for_each_link(link, ap, EDGE) { 4493 ata_for_each_dev(dev, link, ENABLED) { 4494 if (!dev->sdev) 4495 goto exit_loop; 4496 } 4497 } 4498 exit_loop: 4499 if (!link) 4500 return; 4501 4502 /* we're missing some SCSI devices */ 4503 if (sync) { 4504 /* If caller requested synchrnous scan && we've made 4505 * any progress, sleep briefly and repeat. 4506 */ 4507 if (dev != last_failed_dev) { 4508 msleep(100); 4509 last_failed_dev = dev; 4510 goto repeat; 4511 } 4512 4513 /* We might be failing to detect boot device, give it 4514 * a few more chances. 4515 */ 4516 if (--tries) { 4517 msleep(100); 4518 goto repeat; 4519 } 4520 4521 ata_port_err(ap, 4522 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4523 } 4524 4525 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4526 round_jiffies_relative(HZ)); 4527 } 4528 4529 /** 4530 * ata_scsi_offline_dev - offline attached SCSI device 4531 * @dev: ATA device to offline attached SCSI device for 4532 * 4533 * This function is called from ata_eh_hotplug() and responsible 4534 * for taking the SCSI device attached to @dev offline. This 4535 * function is called with host lock which protects dev->sdev 4536 * against clearing. 4537 * 4538 * LOCKING: 4539 * spin_lock_irqsave(host lock) 4540 * 4541 * RETURNS: 4542 * 1 if attached SCSI device exists, 0 otherwise. 4543 */ 4544 int ata_scsi_offline_dev(struct ata_device *dev) 4545 { 4546 if (dev->sdev) { 4547 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4548 return 1; 4549 } 4550 return 0; 4551 } 4552 4553 /** 4554 * ata_scsi_remove_dev - remove attached SCSI device 4555 * @dev: ATA device to remove attached SCSI device for 4556 * 4557 * This function is called from ata_eh_scsi_hotplug() and 4558 * responsible for removing the SCSI device attached to @dev. 4559 * 4560 * LOCKING: 4561 * Kernel thread context (may sleep). 4562 */ 4563 static void ata_scsi_remove_dev(struct ata_device *dev) 4564 { 4565 struct ata_port *ap = dev->link->ap; 4566 struct scsi_device *sdev; 4567 unsigned long flags; 4568 4569 /* Alas, we need to grab scan_mutex to ensure SCSI device 4570 * state doesn't change underneath us and thus 4571 * scsi_device_get() always succeeds. The mutex locking can 4572 * be removed if there is __scsi_device_get() interface which 4573 * increments reference counts regardless of device state. 4574 */ 4575 mutex_lock(&ap->scsi_host->scan_mutex); 4576 spin_lock_irqsave(ap->lock, flags); 4577 4578 /* clearing dev->sdev is protected by host lock */ 4579 sdev = dev->sdev; 4580 dev->sdev = NULL; 4581 4582 if (sdev) { 4583 /* If user initiated unplug races with us, sdev can go 4584 * away underneath us after the host lock and 4585 * scan_mutex are released. Hold onto it. 4586 */ 4587 if (scsi_device_get(sdev) == 0) { 4588 /* The following ensures the attached sdev is 4589 * offline on return from ata_scsi_offline_dev() 4590 * regardless it wins or loses the race 4591 * against this function. 4592 */ 4593 scsi_device_set_state(sdev, SDEV_OFFLINE); 4594 } else { 4595 WARN_ON(1); 4596 sdev = NULL; 4597 } 4598 } 4599 4600 spin_unlock_irqrestore(ap->lock, flags); 4601 mutex_unlock(&ap->scsi_host->scan_mutex); 4602 4603 if (sdev) { 4604 ata_dev_info(dev, "detaching (SCSI %s)\n", 4605 dev_name(&sdev->sdev_gendev)); 4606 4607 scsi_remove_device(sdev); 4608 scsi_device_put(sdev); 4609 } 4610 } 4611 4612 static void ata_scsi_handle_link_detach(struct ata_link *link) 4613 { 4614 struct ata_port *ap = link->ap; 4615 struct ata_device *dev; 4616 4617 ata_for_each_dev(dev, link, ALL) { 4618 unsigned long flags; 4619 4620 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4621 continue; 4622 4623 spin_lock_irqsave(ap->lock, flags); 4624 dev->flags &= ~ATA_DFLAG_DETACHED; 4625 spin_unlock_irqrestore(ap->lock, flags); 4626 4627 if (zpodd_dev_enabled(dev)) 4628 zpodd_exit(dev); 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