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 * @id: ATA device number 796 * @drv_stat: value contained in ATA status register 797 * @drv_err: value contained in ATA error register 798 * @sk: the sense key we'll fill out 799 * @asc: the additional sense code we'll fill out 800 * @ascq: the additional sense code qualifier we'll fill out 801 * 802 * Converts an ATA error into a SCSI error. Fill out pointers to 803 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 804 * format sense blocks. 805 * 806 * LOCKING: 807 * spin_lock_irqsave(host lock) 808 */ 809 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 810 u8 *asc, u8 *ascq) 811 { 812 int i; 813 814 /* Based on the 3ware driver translation table */ 815 static const unsigned char sense_table[][4] = { 816 /* BBD|ECC|ID|MAR */ 817 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 818 // Device busy Aborted command 819 /* BBD|ECC|ID */ 820 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 821 // Device busy Aborted command 822 /* ECC|MC|MARK */ 823 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 824 // Device fault Hardware error 825 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 826 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 827 // Data CRC error SCSI parity error 828 /* MC|ID|ABRT|TRK0|MARK */ 829 {0x37, NOT_READY, 0x04, 0x00}, 830 // Unit offline Not ready 831 /* MCR|MARK */ 832 {0x09, NOT_READY, 0x04, 0x00}, 833 // Unrecovered disk error Not ready 834 /* Bad address mark */ 835 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 836 // Address mark not found for data field 837 /* TRK0 - Track 0 not found */ 838 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 839 // Hardware error 840 /* Abort: 0x04 is not translated here, see below */ 841 /* Media change request */ 842 {0x08, NOT_READY, 0x04, 0x00}, 843 // FIXME: faking offline 844 /* SRV/IDNF - ID not found */ 845 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 846 // Logical address out of range 847 /* MC - Media Changed */ 848 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 849 // Not ready to ready change, medium may have changed 850 /* ECC - Uncorrectable ECC error */ 851 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 852 // Unrecovered read error 853 /* BBD - block marked bad */ 854 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 855 // Block marked bad Medium error, unrecovered read error 856 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 857 }; 858 static const unsigned char stat_table[][4] = { 859 /* Must be first because BUSY means no other bits valid */ 860 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 861 // Busy, fake parity for now 862 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 863 // Device ready, unaligned write command 864 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 865 // Device fault, internal target failure 866 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 867 // Timed out in xfer, fake parity for now 868 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 869 // Recovered ECC error Medium error, recovered 870 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 871 }; 872 873 /* 874 * Is this an error we can process/parse 875 */ 876 if (drv_stat & ATA_BUSY) { 877 drv_err = 0; /* Ignore the err bits, they're invalid */ 878 } 879 880 if (drv_err) { 881 /* Look for drv_err */ 882 for (i = 0; sense_table[i][0] != 0xFF; i++) { 883 /* Look for best matches first */ 884 if ((sense_table[i][0] & drv_err) == 885 sense_table[i][0]) { 886 *sk = sense_table[i][1]; 887 *asc = sense_table[i][2]; 888 *ascq = sense_table[i][3]; 889 return; 890 } 891 } 892 } 893 894 /* 895 * Fall back to interpreting status bits. Note that if the drv_err 896 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 897 * is not descriptive enough. 898 */ 899 for (i = 0; stat_table[i][0] != 0xFF; i++) { 900 if (stat_table[i][0] & drv_stat) { 901 *sk = stat_table[i][1]; 902 *asc = stat_table[i][2]; 903 *ascq = stat_table[i][3]; 904 return; 905 } 906 } 907 908 /* 909 * We need a sensible error return here, which is tricky, and one 910 * that won't cause people to do things like return a disk wrongly. 911 */ 912 *sk = ABORTED_COMMAND; 913 *asc = 0x00; 914 *ascq = 0x00; 915 } 916 917 /* 918 * ata_gen_passthru_sense - Generate check condition sense block. 919 * @qc: Command that completed. 920 * 921 * This function is specific to the ATA pass through commands. 922 * Regardless of whether the command errored or not, return a sense 923 * block. If there was no error, we get the request from an ATA 924 * passthrough command, so we use the following sense data: 925 * sk = RECOVERED ERROR 926 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 927 * 928 * 929 * LOCKING: 930 * None. 931 */ 932 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 933 { 934 struct ata_device *dev = qc->dev; 935 struct scsi_cmnd *cmd = qc->scsicmd; 936 struct ata_taskfile *tf = &qc->result_tf; 937 u8 sense_key, asc, ascq; 938 939 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 940 ata_dev_dbg(dev, 941 "missing result TF: can't generate ATA PT sense data\n"); 942 return; 943 } 944 945 /* 946 * Use ata_to_sense_error() to map status register bits 947 * onto sense key, asc & ascq. 948 */ 949 if (qc->err_mask || 950 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 951 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error, 952 &sense_key, &asc, &ascq); 953 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 954 } else { 955 /* 956 * ATA PASS-THROUGH INFORMATION AVAILABLE 957 * 958 * Note: we are supposed to call ata_scsi_set_sense(), which 959 * respects the D_SENSE bit, instead of unconditionally 960 * generating the sense data in descriptor format. However, 961 * because hdparm, hddtemp, and udisks incorrectly assume sense 962 * data in descriptor format, without even looking at the 963 * RESPONSE CODE field in the returned sense data (to see which 964 * format the returned sense data is in), we are stuck with 965 * being bug compatible with older kernels. 966 */ 967 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); 968 } 969 } 970 971 /** 972 * ata_gen_ata_sense - generate a SCSI fixed sense block 973 * @qc: Command that we are erroring out 974 * 975 * Generate sense block for a failed ATA command @qc. Descriptor 976 * format is used to accommodate LBA48 block address. 977 * 978 * LOCKING: 979 * None. 980 */ 981 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 982 { 983 struct ata_device *dev = qc->dev; 984 struct scsi_cmnd *cmd = qc->scsicmd; 985 struct ata_taskfile *tf = &qc->result_tf; 986 unsigned char *sb = cmd->sense_buffer; 987 u64 block; 988 u8 sense_key, asc, ascq; 989 990 if (ata_dev_disabled(dev)) { 991 /* Device disabled after error recovery */ 992 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 993 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 994 return; 995 } 996 997 if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { 998 ata_dev_dbg(dev, 999 "missing result TF: can't generate sense data\n"); 1000 return; 1001 } 1002 1003 /* Use ata_to_sense_error() to map status register bits 1004 * onto sense key, asc & ascq. 1005 */ 1006 if (qc->err_mask || 1007 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1008 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error, 1009 &sense_key, &asc, &ascq); 1010 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1011 } else { 1012 /* Could not decode error */ 1013 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1014 tf->status, qc->err_mask); 1015 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1016 return; 1017 } 1018 1019 block = ata_tf_read_block(&qc->result_tf, dev); 1020 if (block == U64_MAX) 1021 return; 1022 1023 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1024 } 1025 1026 void ata_scsi_sdev_config(struct scsi_device *sdev) 1027 { 1028 sdev->use_10_for_rw = 1; 1029 sdev->use_10_for_ms = 1; 1030 sdev->no_write_same = 1; 1031 1032 /* Schedule policy is determined by ->qc_defer() callback and 1033 * it needs to see every deferred qc. Set dev_blocked to 1 to 1034 * prevent SCSI midlayer from automatically deferring 1035 * requests. 1036 */ 1037 sdev->max_device_blocked = 1; 1038 } 1039 1040 /** 1041 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1042 * @rq: request to be checked 1043 * 1044 * ATAPI commands which transfer variable length data to host 1045 * might overflow due to application error or hardware bug. This 1046 * function checks whether overflow should be drained and ignored 1047 * for @request. 1048 * 1049 * LOCKING: 1050 * None. 1051 * 1052 * RETURNS: 1053 * 1 if ; otherwise, 0. 1054 */ 1055 bool ata_scsi_dma_need_drain(struct request *rq) 1056 { 1057 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 1058 1059 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; 1060 } 1061 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1062 1063 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1064 { 1065 struct request_queue *q = sdev->request_queue; 1066 int depth = 1; 1067 1068 if (!ata_id_has_unload(dev->id)) 1069 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1070 1071 /* configure max sectors */ 1072 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); 1073 blk_queue_max_hw_sectors(q, dev->max_sectors); 1074 1075 if (dev->class == ATA_DEV_ATAPI) { 1076 sdev->sector_size = ATA_SECT_SIZE; 1077 1078 /* set DMA padding */ 1079 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1080 1081 /* make room for appending the drain */ 1082 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1083 1084 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1085 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1086 if (!sdev->dma_drain_buf) { 1087 ata_dev_err(dev, "drain buffer allocation failed\n"); 1088 return -ENOMEM; 1089 } 1090 } else { 1091 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1092 1093 /* 1094 * Ask the sd driver to issue START STOP UNIT on runtime suspend 1095 * and resume and shutdown only. For system level suspend/resume, 1096 * devices power state is handled directly by libata EH. 1097 * Given that disks are always spun up on system resume, also 1098 * make sure that the sd driver forces runtime suspended disks 1099 * to be resumed to correctly reflect the power state of the 1100 * device. 1101 */ 1102 sdev->manage_runtime_start_stop = 1; 1103 sdev->manage_shutdown = 1; 1104 sdev->force_runtime_start_on_system_start = 1; 1105 } 1106 1107 /* 1108 * ata_pio_sectors() expects buffer for each sector to not cross 1109 * page boundary. Enforce it by requiring buffers to be sector 1110 * aligned, which works iff sector_size is not larger than 1111 * PAGE_SIZE. ATAPI devices also need the alignment as 1112 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1113 */ 1114 if (sdev->sector_size > PAGE_SIZE) 1115 ata_dev_warn(dev, 1116 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1117 sdev->sector_size); 1118 1119 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1120 1121 if (dev->flags & ATA_DFLAG_AN) 1122 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1123 1124 if (ata_ncq_supported(dev)) 1125 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1126 depth = min(ATA_MAX_QUEUE, depth); 1127 scsi_change_queue_depth(sdev, depth); 1128 1129 if (dev->flags & ATA_DFLAG_TRUSTED) 1130 sdev->security_supported = 1; 1131 1132 dev->sdev = sdev; 1133 return 0; 1134 } 1135 1136 /** 1137 * ata_scsi_slave_alloc - Early setup of SCSI device 1138 * @sdev: SCSI device to examine 1139 * 1140 * This is called from scsi_alloc_sdev() when the scsi device 1141 * associated with an ATA device is scanned on a port. 1142 * 1143 * LOCKING: 1144 * Defined by SCSI layer. We don't really care. 1145 */ 1146 1147 int ata_scsi_slave_alloc(struct scsi_device *sdev) 1148 { 1149 struct ata_port *ap = ata_shost_to_port(sdev->host); 1150 struct device_link *link; 1151 1152 ata_scsi_sdev_config(sdev); 1153 1154 /* 1155 * Create a link from the ata_port device to the scsi device to ensure 1156 * that PM does suspend/resume in the correct order: the scsi device is 1157 * consumer (child) and the ata port the supplier (parent). 1158 */ 1159 link = device_link_add(&sdev->sdev_gendev, &ap->tdev, 1160 DL_FLAG_STATELESS | 1161 DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); 1162 if (!link) { 1163 ata_port_err(ap, "Failed to create link to scsi device %s\n", 1164 dev_name(&sdev->sdev_gendev)); 1165 return -ENODEV; 1166 } 1167 1168 return 0; 1169 } 1170 EXPORT_SYMBOL_GPL(ata_scsi_slave_alloc); 1171 1172 /** 1173 * ata_scsi_slave_config - Set SCSI device attributes 1174 * @sdev: SCSI device to examine 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_slave_config(struct scsi_device *sdev) 1185 { 1186 struct ata_port *ap = ata_shost_to_port(sdev->host); 1187 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1188 1189 if (dev) 1190 return ata_scsi_dev_config(sdev, dev); 1191 1192 return 0; 1193 } 1194 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1195 1196 /** 1197 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1198 * @sdev: SCSI device to be destroyed 1199 * 1200 * @sdev is about to be destroyed for hot/warm unplugging. If 1201 * this unplugging was initiated by libata as indicated by NULL 1202 * dev->sdev, this function doesn't have to do anything. 1203 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1204 * Clear dev->sdev, schedule the device for ATA detach and invoke 1205 * EH. 1206 * 1207 * LOCKING: 1208 * Defined by SCSI layer. We don't really care. 1209 */ 1210 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1211 { 1212 struct ata_port *ap = ata_shost_to_port(sdev->host); 1213 unsigned long flags; 1214 struct ata_device *dev; 1215 1216 device_link_remove(&sdev->sdev_gendev, &ap->tdev); 1217 1218 spin_lock_irqsave(ap->lock, flags); 1219 dev = __ata_scsi_find_dev(ap, sdev); 1220 if (dev && dev->sdev) { 1221 /* SCSI device already in CANCEL state, no need to offline it */ 1222 dev->sdev = NULL; 1223 dev->flags |= ATA_DFLAG_DETACH; 1224 ata_port_schedule_eh(ap); 1225 } 1226 spin_unlock_irqrestore(ap->lock, flags); 1227 1228 kfree(sdev->dma_drain_buf); 1229 } 1230 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1231 1232 /** 1233 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1234 * @qc: Storage for translated ATA taskfile 1235 * 1236 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1237 * (to start). Perhaps these commands should be preceded by 1238 * CHECK POWER MODE to see what power mode the device is already in. 1239 * [See SAT revision 5 at www.t10.org] 1240 * 1241 * LOCKING: 1242 * spin_lock_irqsave(host lock) 1243 * 1244 * RETURNS: 1245 * Zero on success, non-zero on error. 1246 */ 1247 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1248 { 1249 struct scsi_cmnd *scmd = qc->scsicmd; 1250 struct ata_taskfile *tf = &qc->tf; 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 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1261 tf->protocol = ATA_PROT_NODATA; 1262 if (cdb[1] & 0x1) { 1263 ; /* ignore IMMED bit, violates sat-r05 */ 1264 } 1265 if (cdb[4] & 0x2) { 1266 fp = 4; 1267 bp = 1; 1268 goto invalid_fld; /* LOEJ bit set not supported */ 1269 } 1270 if (((cdb[4] >> 4) & 0xf) != 0) { 1271 fp = 4; 1272 bp = 3; 1273 goto invalid_fld; /* power conditions not supported */ 1274 } 1275 1276 if (cdb[4] & 0x1) { 1277 tf->nsect = 1; /* 1 sector, lba=0 */ 1278 1279 if (qc->dev->flags & ATA_DFLAG_LBA) { 1280 tf->flags |= ATA_TFLAG_LBA; 1281 1282 tf->lbah = 0x0; 1283 tf->lbam = 0x0; 1284 tf->lbal = 0x0; 1285 tf->device |= ATA_LBA; 1286 } else { 1287 /* CHS */ 1288 tf->lbal = 0x1; /* sect */ 1289 tf->lbam = 0x0; /* cyl low */ 1290 tf->lbah = 0x0; /* cyl high */ 1291 } 1292 1293 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1294 } else { 1295 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1296 * or S5) causing some drives to spin up and down again. 1297 */ 1298 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1299 system_state == SYSTEM_POWER_OFF) 1300 goto skip; 1301 1302 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1303 system_entering_hibernation()) 1304 goto skip; 1305 1306 /* Issue ATA STANDBY IMMEDIATE command */ 1307 tf->command = ATA_CMD_STANDBYNOW1; 1308 } 1309 1310 /* 1311 * Standby and Idle condition timers could be implemented but that 1312 * would require libata to implement the Power condition mode page 1313 * and allow the user to change it. Changing mode pages requires 1314 * MODE SELECT to be implemented. 1315 */ 1316 1317 return 0; 1318 1319 invalid_fld: 1320 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1321 return 1; 1322 skip: 1323 scmd->result = SAM_STAT_GOOD; 1324 return 1; 1325 } 1326 1327 1328 /** 1329 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1330 * @qc: Storage for translated ATA taskfile 1331 * 1332 * Sets up an ATA taskfile to issue FLUSH CACHE or 1333 * FLUSH CACHE EXT. 1334 * 1335 * LOCKING: 1336 * spin_lock_irqsave(host lock) 1337 * 1338 * RETURNS: 1339 * Zero on success, non-zero on error. 1340 */ 1341 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1342 { 1343 struct ata_taskfile *tf = &qc->tf; 1344 1345 tf->flags |= ATA_TFLAG_DEVICE; 1346 tf->protocol = ATA_PROT_NODATA; 1347 1348 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1349 tf->command = ATA_CMD_FLUSH_EXT; 1350 else 1351 tf->command = ATA_CMD_FLUSH; 1352 1353 /* flush is critical for IO integrity, consider it an IO command */ 1354 qc->flags |= ATA_QCFLAG_IO; 1355 1356 return 0; 1357 } 1358 1359 /** 1360 * scsi_6_lba_len - Get LBA and transfer length 1361 * @cdb: SCSI command to translate 1362 * 1363 * Calculate LBA and transfer length for 6-byte commands. 1364 * 1365 * RETURNS: 1366 * @plba: the LBA 1367 * @plen: the transfer length 1368 */ 1369 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1370 { 1371 u64 lba = 0; 1372 u32 len; 1373 1374 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1375 lba |= ((u64)cdb[2]) << 8; 1376 lba |= ((u64)cdb[3]); 1377 1378 len = cdb[4]; 1379 1380 *plba = lba; 1381 *plen = len; 1382 } 1383 1384 /** 1385 * scsi_10_lba_len - Get LBA and transfer length 1386 * @cdb: SCSI command to translate 1387 * 1388 * Calculate LBA and transfer length for 10-byte commands. 1389 * 1390 * RETURNS: 1391 * @plba: the LBA 1392 * @plen: the transfer length 1393 */ 1394 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1395 { 1396 *plba = get_unaligned_be32(&cdb[2]); 1397 *plen = get_unaligned_be16(&cdb[7]); 1398 } 1399 1400 /** 1401 * scsi_16_lba_len - Get LBA and transfer length 1402 * @cdb: SCSI command to translate 1403 * 1404 * Calculate LBA and transfer length for 16-byte commands. 1405 * 1406 * RETURNS: 1407 * @plba: the LBA 1408 * @plen: the transfer length 1409 */ 1410 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1411 { 1412 *plba = get_unaligned_be64(&cdb[2]); 1413 *plen = get_unaligned_be32(&cdb[10]); 1414 } 1415 1416 /** 1417 * scsi_dld - Get duration limit descriptor index 1418 * @cdb: SCSI command to translate 1419 * 1420 * Returns the dld bits indicating the index of a command duration limit 1421 * descriptor. 1422 */ 1423 static inline int scsi_dld(const u8 *cdb) 1424 { 1425 return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03); 1426 } 1427 1428 /** 1429 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1430 * @qc: Storage for translated ATA taskfile 1431 * 1432 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1433 * 1434 * LOCKING: 1435 * spin_lock_irqsave(host lock) 1436 * 1437 * RETURNS: 1438 * Zero on success, non-zero on error. 1439 */ 1440 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1441 { 1442 struct scsi_cmnd *scmd = qc->scsicmd; 1443 struct ata_taskfile *tf = &qc->tf; 1444 struct ata_device *dev = qc->dev; 1445 u64 dev_sectors = qc->dev->n_sectors; 1446 const u8 *cdb = scmd->cmnd; 1447 u64 block; 1448 u32 n_block; 1449 u16 fp; 1450 1451 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1452 tf->protocol = ATA_PROT_NODATA; 1453 1454 switch (cdb[0]) { 1455 case VERIFY: 1456 if (scmd->cmd_len < 10) { 1457 fp = 9; 1458 goto invalid_fld; 1459 } 1460 scsi_10_lba_len(cdb, &block, &n_block); 1461 break; 1462 case VERIFY_16: 1463 if (scmd->cmd_len < 16) { 1464 fp = 15; 1465 goto invalid_fld; 1466 } 1467 scsi_16_lba_len(cdb, &block, &n_block); 1468 break; 1469 default: 1470 fp = 0; 1471 goto invalid_fld; 1472 } 1473 1474 if (!n_block) 1475 goto nothing_to_do; 1476 if (block >= dev_sectors) 1477 goto out_of_range; 1478 if ((block + n_block) > dev_sectors) 1479 goto out_of_range; 1480 1481 if (dev->flags & ATA_DFLAG_LBA) { 1482 tf->flags |= ATA_TFLAG_LBA; 1483 1484 if (lba_28_ok(block, n_block)) { 1485 /* use LBA28 */ 1486 tf->command = ATA_CMD_VERIFY; 1487 tf->device |= (block >> 24) & 0xf; 1488 } else if (lba_48_ok(block, n_block)) { 1489 if (!(dev->flags & ATA_DFLAG_LBA48)) 1490 goto out_of_range; 1491 1492 /* use LBA48 */ 1493 tf->flags |= ATA_TFLAG_LBA48; 1494 tf->command = ATA_CMD_VERIFY_EXT; 1495 1496 tf->hob_nsect = (n_block >> 8) & 0xff; 1497 1498 tf->hob_lbah = (block >> 40) & 0xff; 1499 tf->hob_lbam = (block >> 32) & 0xff; 1500 tf->hob_lbal = (block >> 24) & 0xff; 1501 } else 1502 /* request too large even for LBA48 */ 1503 goto out_of_range; 1504 1505 tf->nsect = n_block & 0xff; 1506 1507 tf->lbah = (block >> 16) & 0xff; 1508 tf->lbam = (block >> 8) & 0xff; 1509 tf->lbal = block & 0xff; 1510 1511 tf->device |= ATA_LBA; 1512 } else { 1513 /* CHS */ 1514 u32 sect, head, cyl, track; 1515 1516 if (!lba_28_ok(block, n_block)) 1517 goto out_of_range; 1518 1519 /* Convert LBA to CHS */ 1520 track = (u32)block / dev->sectors; 1521 cyl = track / dev->heads; 1522 head = track % dev->heads; 1523 sect = (u32)block % dev->sectors + 1; 1524 1525 /* Check whether the converted CHS can fit. 1526 Cylinder: 0-65535 1527 Head: 0-15 1528 Sector: 1-255*/ 1529 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1530 goto out_of_range; 1531 1532 tf->command = ATA_CMD_VERIFY; 1533 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1534 tf->lbal = sect; 1535 tf->lbam = cyl; 1536 tf->lbah = cyl >> 8; 1537 tf->device |= head; 1538 } 1539 1540 return 0; 1541 1542 invalid_fld: 1543 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1544 return 1; 1545 1546 out_of_range: 1547 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1548 /* "Logical Block Address out of range" */ 1549 return 1; 1550 1551 nothing_to_do: 1552 scmd->result = SAM_STAT_GOOD; 1553 return 1; 1554 } 1555 1556 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1557 { 1558 struct request *rq = scsi_cmd_to_rq(scmd); 1559 u32 req_blocks; 1560 1561 if (!blk_rq_is_passthrough(rq)) 1562 return true; 1563 1564 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1565 if (n_blocks > req_blocks) 1566 return false; 1567 1568 return true; 1569 } 1570 1571 /** 1572 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1573 * @qc: Storage for translated ATA taskfile 1574 * 1575 * Converts any of six SCSI read/write commands into the 1576 * ATA counterpart, including starting sector (LBA), 1577 * sector count, and taking into account the device's LBA48 1578 * support. 1579 * 1580 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1581 * %WRITE_16 are currently supported. 1582 * 1583 * LOCKING: 1584 * spin_lock_irqsave(host lock) 1585 * 1586 * RETURNS: 1587 * Zero on success, non-zero on error. 1588 */ 1589 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1590 { 1591 struct scsi_cmnd *scmd = qc->scsicmd; 1592 const u8 *cdb = scmd->cmnd; 1593 struct request *rq = scsi_cmd_to_rq(scmd); 1594 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1595 unsigned int tf_flags = 0; 1596 int dld = 0; 1597 u64 block; 1598 u32 n_block; 1599 int rc; 1600 u16 fp = 0; 1601 1602 switch (cdb[0]) { 1603 case WRITE_6: 1604 case WRITE_10: 1605 case WRITE_16: 1606 tf_flags |= ATA_TFLAG_WRITE; 1607 break; 1608 } 1609 1610 /* Calculate the SCSI LBA, transfer length and FUA. */ 1611 switch (cdb[0]) { 1612 case READ_10: 1613 case WRITE_10: 1614 if (unlikely(scmd->cmd_len < 10)) { 1615 fp = 9; 1616 goto invalid_fld; 1617 } 1618 scsi_10_lba_len(cdb, &block, &n_block); 1619 if (cdb[1] & (1 << 3)) 1620 tf_flags |= ATA_TFLAG_FUA; 1621 if (!ata_check_nblocks(scmd, n_block)) 1622 goto invalid_fld; 1623 break; 1624 case READ_6: 1625 case WRITE_6: 1626 if (unlikely(scmd->cmd_len < 6)) { 1627 fp = 5; 1628 goto invalid_fld; 1629 } 1630 scsi_6_lba_len(cdb, &block, &n_block); 1631 1632 /* for 6-byte r/w commands, transfer length 0 1633 * means 256 blocks of data, not 0 block. 1634 */ 1635 if (!n_block) 1636 n_block = 256; 1637 if (!ata_check_nblocks(scmd, n_block)) 1638 goto invalid_fld; 1639 break; 1640 case READ_16: 1641 case WRITE_16: 1642 if (unlikely(scmd->cmd_len < 16)) { 1643 fp = 15; 1644 goto invalid_fld; 1645 } 1646 scsi_16_lba_len(cdb, &block, &n_block); 1647 dld = scsi_dld(cdb); 1648 if (cdb[1] & (1 << 3)) 1649 tf_flags |= ATA_TFLAG_FUA; 1650 if (!ata_check_nblocks(scmd, n_block)) 1651 goto invalid_fld; 1652 break; 1653 default: 1654 fp = 0; 1655 goto invalid_fld; 1656 } 1657 1658 /* Check and compose ATA command */ 1659 if (!n_block) 1660 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1661 * length 0 means transfer 0 block of data. 1662 * However, for ATA R/W commands, sector count 0 means 1663 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1664 * 1665 * WARNING: one or two older ATA drives treat 0 as 0... 1666 */ 1667 goto nothing_to_do; 1668 1669 qc->flags |= ATA_QCFLAG_IO; 1670 qc->nbytes = n_block * scmd->device->sector_size; 1671 1672 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class); 1673 if (likely(rc == 0)) 1674 return 0; 1675 1676 if (rc == -ERANGE) 1677 goto out_of_range; 1678 /* treat all other errors as -EINVAL, fall through */ 1679 invalid_fld: 1680 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1681 return 1; 1682 1683 out_of_range: 1684 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1685 /* "Logical Block Address out of range" */ 1686 return 1; 1687 1688 nothing_to_do: 1689 scmd->result = SAM_STAT_GOOD; 1690 return 1; 1691 } 1692 1693 static void ata_qc_done(struct ata_queued_cmd *qc) 1694 { 1695 struct scsi_cmnd *cmd = qc->scsicmd; 1696 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1697 1698 ata_qc_free(qc); 1699 done(cmd); 1700 } 1701 1702 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1703 { 1704 struct scsi_cmnd *cmd = qc->scsicmd; 1705 u8 *cdb = cmd->cmnd; 1706 bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID; 1707 bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12; 1708 bool is_ck_cond_request = cdb[2] & 0x20; 1709 bool is_error = qc->err_mask != 0; 1710 1711 /* For ATA pass thru (SAT) commands, generate a sense block if 1712 * user mandated it or if there's an error. Note that if we 1713 * generate because the user forced us to [CK_COND=1], a check 1714 * condition is generated and the ATA register values are returned 1715 * whether the command completed successfully or not. If there 1716 * was no error, and CK_COND=1, we use the following sense data: 1717 * sk = RECOVERED ERROR 1718 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1719 */ 1720 if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) { 1721 if (!have_sense) 1722 ata_gen_passthru_sense(qc); 1723 ata_scsi_set_passthru_sense_fields(qc); 1724 if (is_ck_cond_request) 1725 set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); 1726 } else if (is_error && !have_sense) { 1727 ata_gen_ata_sense(qc); 1728 } 1729 1730 ata_qc_done(qc); 1731 } 1732 1733 /** 1734 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1735 * @dev: ATA device to which the command is addressed 1736 * @cmd: SCSI command to execute 1737 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1738 * 1739 * Our ->queuecommand() function has decided that the SCSI 1740 * command issued can be directly translated into an ATA 1741 * command, rather than handled internally. 1742 * 1743 * This function sets up an ata_queued_cmd structure for the 1744 * SCSI command, and sends that ata_queued_cmd to the hardware. 1745 * 1746 * The xlat_func argument (actor) returns 0 if ready to execute 1747 * ATA command, else 1 to finish translation. If 1 is returned 1748 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1749 * to be set reflecting an error condition or clean (early) 1750 * termination. 1751 * 1752 * LOCKING: 1753 * spin_lock_irqsave(host lock) 1754 * 1755 * RETURNS: 1756 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1757 * needs to be deferred. 1758 */ 1759 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1760 ata_xlat_func_t xlat_func) 1761 { 1762 struct ata_port *ap = dev->link->ap; 1763 struct ata_queued_cmd *qc; 1764 int rc; 1765 1766 qc = ata_scsi_qc_new(dev, cmd); 1767 if (!qc) 1768 goto err_mem; 1769 1770 /* data is present; dma-map it */ 1771 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1772 cmd->sc_data_direction == DMA_TO_DEVICE) { 1773 if (unlikely(scsi_bufflen(cmd) < 1)) { 1774 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1775 goto err_did; 1776 } 1777 1778 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1779 1780 qc->dma_dir = cmd->sc_data_direction; 1781 } 1782 1783 qc->complete_fn = ata_scsi_qc_complete; 1784 1785 if (xlat_func(qc)) 1786 goto early_finish; 1787 1788 if (ap->ops->qc_defer) { 1789 if ((rc = ap->ops->qc_defer(qc))) 1790 goto defer; 1791 } 1792 1793 /* select device, send command to hardware */ 1794 ata_qc_issue(qc); 1795 1796 return 0; 1797 1798 early_finish: 1799 ata_qc_free(qc); 1800 scsi_done(cmd); 1801 return 0; 1802 1803 err_did: 1804 ata_qc_free(qc); 1805 cmd->result = (DID_ERROR << 16); 1806 scsi_done(cmd); 1807 err_mem: 1808 return 0; 1809 1810 defer: 1811 ata_qc_free(qc); 1812 if (rc == ATA_DEFER_LINK) 1813 return SCSI_MLQUEUE_DEVICE_BUSY; 1814 else 1815 return SCSI_MLQUEUE_HOST_BUSY; 1816 } 1817 1818 struct ata_scsi_args { 1819 struct ata_device *dev; 1820 u16 *id; 1821 struct scsi_cmnd *cmd; 1822 }; 1823 1824 /** 1825 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1826 * @args: device IDENTIFY data / SCSI command of interest. 1827 * @actor: Callback hook for desired SCSI command simulator 1828 * 1829 * Takes care of the hard work of simulating a SCSI command... 1830 * Mapping the response buffer, calling the command's handler, 1831 * and handling the handler's return value. This return value 1832 * indicates whether the handler wishes the SCSI command to be 1833 * completed successfully (0), or not (in which case cmd->result 1834 * and sense buffer are assumed to be set). 1835 * 1836 * LOCKING: 1837 * spin_lock_irqsave(host lock) 1838 */ 1839 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1840 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1841 { 1842 unsigned int rc; 1843 struct scsi_cmnd *cmd = args->cmd; 1844 unsigned long flags; 1845 1846 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1847 1848 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1849 rc = actor(args, ata_scsi_rbuf); 1850 if (rc == 0) 1851 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1852 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1853 1854 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1855 1856 if (rc == 0) 1857 cmd->result = SAM_STAT_GOOD; 1858 } 1859 1860 /** 1861 * ata_scsiop_inq_std - Simulate INQUIRY command 1862 * @args: device IDENTIFY data / SCSI command of interest. 1863 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1864 * 1865 * Returns standard device identification data associated 1866 * with non-VPD INQUIRY command output. 1867 * 1868 * LOCKING: 1869 * spin_lock_irqsave(host lock) 1870 */ 1871 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1872 { 1873 static const u8 versions[] = { 1874 0x00, 1875 0x60, /* SAM-3 (no version claimed) */ 1876 1877 0x03, 1878 0x20, /* SBC-2 (no version claimed) */ 1879 1880 0x03, 1881 0x00 /* SPC-3 (no version claimed) */ 1882 }; 1883 static const u8 versions_zbc[] = { 1884 0x00, 1885 0xA0, /* SAM-5 (no version claimed) */ 1886 1887 0x06, 1888 0x00, /* SBC-4 (no version claimed) */ 1889 1890 0x05, 1891 0xC0, /* SPC-5 (no version claimed) */ 1892 1893 0x60, 1894 0x24, /* ZBC r05 */ 1895 }; 1896 1897 u8 hdr[] = { 1898 TYPE_DISK, 1899 0, 1900 0x5, /* claim SPC-3 version compatibility */ 1901 2, 1902 95 - 4, 1903 0, 1904 0, 1905 2 1906 }; 1907 1908 /* set scsi removable (RMB) bit per ata bit, or if the 1909 * AHCI port says it's external (Hotplug-capable, eSATA). 1910 */ 1911 if (ata_id_removable(args->id) || 1912 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1913 hdr[1] |= (1 << 7); 1914 1915 if (args->dev->class == ATA_DEV_ZAC) { 1916 hdr[0] = TYPE_ZBC; 1917 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1918 } 1919 1920 if (args->dev->flags & ATA_DFLAG_CDL) 1921 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 1922 1923 memcpy(rbuf, hdr, sizeof(hdr)); 1924 memcpy(&rbuf[8], "ATA ", 8); 1925 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1926 1927 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1928 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1929 if (strncmp(&rbuf[32], " ", 4) == 0) 1930 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1931 1932 if (rbuf[32] == 0 || rbuf[32] == ' ') 1933 memcpy(&rbuf[32], "n/a ", 4); 1934 1935 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1936 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1937 else 1938 memcpy(rbuf + 58, versions, sizeof(versions)); 1939 1940 return 0; 1941 } 1942 1943 /** 1944 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1945 * @args: device IDENTIFY data / SCSI command of interest. 1946 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1947 * 1948 * Returns list of inquiry VPD pages available. 1949 * 1950 * LOCKING: 1951 * spin_lock_irqsave(host lock) 1952 */ 1953 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1954 { 1955 int i, num_pages = 0; 1956 static const u8 pages[] = { 1957 0x00, /* page 0x00, this page */ 1958 0x80, /* page 0x80, unit serial no page */ 1959 0x83, /* page 0x83, device ident page */ 1960 0x89, /* page 0x89, ata info page */ 1961 0xb0, /* page 0xb0, block limits page */ 1962 0xb1, /* page 0xb1, block device characteristics page */ 1963 0xb2, /* page 0xb2, thin provisioning page */ 1964 0xb6, /* page 0xb6, zoned block device characteristics */ 1965 0xb9, /* page 0xb9, concurrent positioning ranges */ 1966 }; 1967 1968 for (i = 0; i < sizeof(pages); i++) { 1969 if (pages[i] == 0xb6 && 1970 !(args->dev->flags & ATA_DFLAG_ZAC)) 1971 continue; 1972 rbuf[num_pages + 4] = pages[i]; 1973 num_pages++; 1974 } 1975 rbuf[3] = num_pages; /* number of supported VPD pages */ 1976 return 0; 1977 } 1978 1979 /** 1980 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1981 * @args: device IDENTIFY data / SCSI command of interest. 1982 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1983 * 1984 * Returns ATA device serial number. 1985 * 1986 * LOCKING: 1987 * spin_lock_irqsave(host lock) 1988 */ 1989 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1990 { 1991 static const u8 hdr[] = { 1992 0, 1993 0x80, /* this page code */ 1994 0, 1995 ATA_ID_SERNO_LEN, /* page len */ 1996 }; 1997 1998 memcpy(rbuf, hdr, sizeof(hdr)); 1999 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2000 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2001 return 0; 2002 } 2003 2004 /** 2005 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2006 * @args: device IDENTIFY data / SCSI command of interest. 2007 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2008 * 2009 * Yields two logical unit device identification designators: 2010 * - vendor specific ASCII containing the ATA serial number 2011 * - SAT defined "t10 vendor id based" containing ASCII vendor 2012 * name ("ATA "), model and serial numbers. 2013 * 2014 * LOCKING: 2015 * spin_lock_irqsave(host lock) 2016 */ 2017 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2018 { 2019 const int sat_model_serial_desc_len = 68; 2020 int num; 2021 2022 rbuf[1] = 0x83; /* this page code */ 2023 num = 4; 2024 2025 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2026 rbuf[num + 0] = 2; 2027 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2028 num += 4; 2029 ata_id_string(args->id, (unsigned char *) rbuf + num, 2030 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2031 num += ATA_ID_SERNO_LEN; 2032 2033 /* SAT defined lu model and serial numbers descriptor */ 2034 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2035 rbuf[num + 0] = 2; 2036 rbuf[num + 1] = 1; 2037 rbuf[num + 3] = sat_model_serial_desc_len; 2038 num += 4; 2039 memcpy(rbuf + num, "ATA ", 8); 2040 num += 8; 2041 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2042 ATA_ID_PROD_LEN); 2043 num += ATA_ID_PROD_LEN; 2044 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2045 ATA_ID_SERNO_LEN); 2046 num += ATA_ID_SERNO_LEN; 2047 2048 if (ata_id_has_wwn(args->id)) { 2049 /* SAT defined lu world wide name */ 2050 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2051 rbuf[num + 0] = 1; 2052 rbuf[num + 1] = 3; 2053 rbuf[num + 3] = ATA_ID_WWN_LEN; 2054 num += 4; 2055 ata_id_string(args->id, (unsigned char *) rbuf + num, 2056 ATA_ID_WWN, ATA_ID_WWN_LEN); 2057 num += ATA_ID_WWN_LEN; 2058 } 2059 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2060 return 0; 2061 } 2062 2063 /** 2064 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2065 * @args: device IDENTIFY data / SCSI command of interest. 2066 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2067 * 2068 * Yields SAT-specified ATA VPD page. 2069 * 2070 * LOCKING: 2071 * spin_lock_irqsave(host lock) 2072 */ 2073 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2074 { 2075 rbuf[1] = 0x89; /* our page code */ 2076 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2077 rbuf[3] = (0x238 & 0xff); 2078 2079 memcpy(&rbuf[8], "linux ", 8); 2080 memcpy(&rbuf[16], "libata ", 16); 2081 memcpy(&rbuf[32], DRV_VERSION, 4); 2082 2083 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2084 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2085 /* TODO: PMP? */ 2086 2087 /* we don't store the ATA device signature, so we fake it */ 2088 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2089 rbuf[40] = 0x1; 2090 rbuf[48] = 0x1; 2091 2092 rbuf[56] = ATA_CMD_ID_ATA; 2093 2094 memcpy(&rbuf[60], &args->id[0], 512); 2095 return 0; 2096 } 2097 2098 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2099 { 2100 struct ata_device *dev = args->dev; 2101 u16 min_io_sectors; 2102 2103 rbuf[1] = 0xb0; 2104 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2105 2106 /* 2107 * Optimal transfer length granularity. 2108 * 2109 * This is always one physical block, but for disks with a smaller 2110 * logical than physical sector size we need to figure out what the 2111 * latter is. 2112 */ 2113 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2114 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2115 2116 /* 2117 * Optimal unmap granularity. 2118 * 2119 * The ATA spec doesn't even know about a granularity or alignment 2120 * for the TRIM command. We can leave away most of the unmap related 2121 * VPD page entries, but we have specifify a granularity to signal 2122 * that we support some form of unmap - in thise case via WRITE SAME 2123 * with the unmap bit set. 2124 */ 2125 if (ata_id_has_trim(args->id)) { 2126 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2127 2128 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2129 max_blocks = 128 << (20 - SECTOR_SHIFT); 2130 2131 put_unaligned_be64(max_blocks, &rbuf[36]); 2132 put_unaligned_be32(1, &rbuf[28]); 2133 } 2134 2135 return 0; 2136 } 2137 2138 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2139 { 2140 int form_factor = ata_id_form_factor(args->id); 2141 int media_rotation_rate = ata_id_rotation_rate(args->id); 2142 u8 zoned = ata_id_zoned_cap(args->id); 2143 2144 rbuf[1] = 0xb1; 2145 rbuf[3] = 0x3c; 2146 rbuf[4] = media_rotation_rate >> 8; 2147 rbuf[5] = media_rotation_rate; 2148 rbuf[7] = form_factor; 2149 if (zoned) 2150 rbuf[8] = (zoned << 4); 2151 2152 return 0; 2153 } 2154 2155 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2156 { 2157 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2158 rbuf[1] = 0xb2; 2159 rbuf[3] = 0x4; 2160 rbuf[5] = 1 << 6; /* TPWS */ 2161 2162 return 0; 2163 } 2164 2165 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2166 { 2167 /* 2168 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2169 */ 2170 rbuf[1] = 0xb6; 2171 rbuf[3] = 0x3C; 2172 2173 /* 2174 * URSWRZ bit is only meaningful for host-managed ZAC drives 2175 */ 2176 if (args->dev->zac_zoned_cap & 1) 2177 rbuf[4] |= 1; 2178 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2179 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2180 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2181 2182 return 0; 2183 } 2184 2185 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2186 { 2187 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2188 u8 *desc = &rbuf[64]; 2189 int i; 2190 2191 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2192 rbuf[1] = 0xb9; 2193 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2194 2195 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2196 desc[0] = cpr_log->cpr[i].num; 2197 desc[1] = cpr_log->cpr[i].num_storage_elements; 2198 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2199 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2200 } 2201 2202 return 0; 2203 } 2204 2205 /** 2206 * modecpy - Prepare response for MODE SENSE 2207 * @dest: output buffer 2208 * @src: data being copied 2209 * @n: length of mode page 2210 * @changeable: whether changeable parameters are requested 2211 * 2212 * Generate a generic MODE SENSE page for either current or changeable 2213 * parameters. 2214 * 2215 * LOCKING: 2216 * None. 2217 */ 2218 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2219 { 2220 if (changeable) { 2221 memcpy(dest, src, 2); 2222 memset(dest + 2, 0, n - 2); 2223 } else { 2224 memcpy(dest, src, n); 2225 } 2226 } 2227 2228 /** 2229 * ata_msense_caching - Simulate MODE SENSE caching info page 2230 * @id: device IDENTIFY data 2231 * @buf: output buffer 2232 * @changeable: whether changeable parameters are requested 2233 * 2234 * Generate a caching info page, which conditionally indicates 2235 * write caching to the SCSI layer, depending on device 2236 * capabilities. 2237 * 2238 * LOCKING: 2239 * None. 2240 */ 2241 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2242 { 2243 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2244 if (changeable) { 2245 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2246 } else { 2247 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2248 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2249 } 2250 return sizeof(def_cache_mpage); 2251 } 2252 2253 /* 2254 * Simulate MODE SENSE control mode page, sub-page 0. 2255 */ 2256 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2257 bool changeable) 2258 { 2259 modecpy(buf, def_control_mpage, 2260 sizeof(def_control_mpage), changeable); 2261 if (changeable) { 2262 /* ata_mselect_control() */ 2263 buf[2] |= (1 << 2); 2264 } else { 2265 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2266 2267 /* descriptor format sense data */ 2268 buf[2] |= (d_sense << 2); 2269 } 2270 2271 return sizeof(def_control_mpage); 2272 } 2273 2274 /* 2275 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2276 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2277 * only, take care of overflows. 2278 */ 2279 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2280 { 2281 u32 limit = get_unaligned_le32(buf); 2282 2283 return min_t(u32, limit / 10000, 65535); 2284 } 2285 2286 /* 2287 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2288 * (command duration limits T2A and T2B mode pages). 2289 */ 2290 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2291 u8 spg) 2292 { 2293 u8 *b, *cdl = dev->cdl, *desc; 2294 u32 policy; 2295 int i; 2296 2297 /* 2298 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2299 * are a header. The PAGE LENGTH field is the size of the page 2300 * excluding the header. 2301 */ 2302 buf[0] = CONTROL_MPAGE; 2303 buf[1] = spg; 2304 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2305 if (spg == CDL_T2A_SUB_MPAGE) { 2306 /* 2307 * Read descriptors map to the T2A page: 2308 * set perf_vs_duration_guidleine. 2309 */ 2310 buf[7] = (cdl[0] & 0x03) << 4; 2311 desc = cdl + 64; 2312 } else { 2313 /* Write descriptors map to the T2B page */ 2314 desc = cdl + 288; 2315 } 2316 2317 /* Fill the T2 page descriptors */ 2318 b = &buf[8]; 2319 policy = get_unaligned_le32(&cdl[0]); 2320 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2321 /* t2cdlunits: fixed to 10ms */ 2322 b[0] = 0x0a; 2323 2324 /* Max inactive time and its policy */ 2325 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2326 b[6] = ((policy >> 8) & 0x0f) << 4; 2327 2328 /* Max active time and its policy */ 2329 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2330 b[6] |= (policy >> 4) & 0x0f; 2331 2332 /* Command duration guideline and its policy */ 2333 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2334 b[14] = policy & 0x0f; 2335 } 2336 2337 return CDL_T2_SUB_MPAGE_LEN; 2338 } 2339 2340 /* 2341 * Simulate MODE SENSE control mode page, sub-page f2h 2342 * (ATA feature control mode page). 2343 */ 2344 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2345 u8 *buf) 2346 { 2347 /* PS=0, SPF=1 */ 2348 buf[0] = CONTROL_MPAGE | (1 << 6); 2349 buf[1] = ATA_FEATURE_SUB_MPAGE; 2350 2351 /* 2352 * The first four bytes of ATA Feature Control mode page are a header. 2353 * The PAGE LENGTH field is the size of the page excluding the header. 2354 */ 2355 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2356 2357 if (dev->flags & ATA_DFLAG_CDL) 2358 buf[4] = 0x02; /* Support T2A and T2B pages */ 2359 else 2360 buf[4] = 0; 2361 2362 return ATA_FEATURE_SUB_MPAGE_LEN; 2363 } 2364 2365 /** 2366 * ata_msense_control - Simulate MODE SENSE control mode page 2367 * @dev: ATA device of interest 2368 * @buf: output buffer 2369 * @spg: sub-page code 2370 * @changeable: whether changeable parameters are requested 2371 * 2372 * Generate a generic MODE SENSE control mode page. 2373 * 2374 * LOCKING: 2375 * None. 2376 */ 2377 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2378 u8 spg, bool changeable) 2379 { 2380 unsigned int n; 2381 2382 switch (spg) { 2383 case 0: 2384 return ata_msense_control_spg0(dev, buf, changeable); 2385 case CDL_T2A_SUB_MPAGE: 2386 case CDL_T2B_SUB_MPAGE: 2387 return ata_msense_control_spgt2(dev, buf, spg); 2388 case ATA_FEATURE_SUB_MPAGE: 2389 return ata_msense_control_ata_feature(dev, buf); 2390 case ALL_SUB_MPAGES: 2391 n = ata_msense_control_spg0(dev, buf, changeable); 2392 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2393 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2B_SUB_MPAGE); 2394 n += ata_msense_control_ata_feature(dev, buf + n); 2395 return n; 2396 default: 2397 return 0; 2398 } 2399 } 2400 2401 /** 2402 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2403 * @buf: output buffer 2404 * @changeable: whether changeable parameters are requested 2405 * 2406 * Generate a generic MODE SENSE r/w error recovery page. 2407 * 2408 * LOCKING: 2409 * None. 2410 */ 2411 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2412 { 2413 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2414 changeable); 2415 return sizeof(def_rw_recovery_mpage); 2416 } 2417 2418 /** 2419 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2420 * @args: device IDENTIFY data / SCSI command of interest. 2421 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2422 * 2423 * Simulate MODE SENSE commands. Assume this is invoked for direct 2424 * access devices (e.g. disks) only. There should be no block 2425 * descriptor for other device types. 2426 * 2427 * LOCKING: 2428 * spin_lock_irqsave(host lock) 2429 */ 2430 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2431 { 2432 struct ata_device *dev = args->dev; 2433 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2434 static const u8 sat_blk_desc[] = { 2435 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2436 0, 2437 0, 0x2, 0x0 /* block length: 512 bytes */ 2438 }; 2439 u8 pg, spg; 2440 unsigned int ebd, page_control, six_byte; 2441 u8 dpofua = 0, bp = 0xff; 2442 u16 fp; 2443 2444 six_byte = (scsicmd[0] == MODE_SENSE); 2445 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2446 /* 2447 * LLBA bit in msense(10) ignored (compliant) 2448 */ 2449 2450 page_control = scsicmd[2] >> 6; 2451 switch (page_control) { 2452 case 0: /* current */ 2453 case 1: /* changeable */ 2454 case 2: /* defaults */ 2455 break; /* supported */ 2456 case 3: /* saved */ 2457 goto saving_not_supp; 2458 default: 2459 fp = 2; 2460 bp = 6; 2461 goto invalid_fld; 2462 } 2463 2464 if (six_byte) 2465 p += 4 + (ebd ? 8 : 0); 2466 else 2467 p += 8 + (ebd ? 8 : 0); 2468 2469 pg = scsicmd[2] & 0x3f; 2470 spg = scsicmd[3]; 2471 2472 /* 2473 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2474 * the control page. 2475 */ 2476 if (spg) { 2477 switch (spg) { 2478 case ALL_SUB_MPAGES: 2479 break; 2480 case CDL_T2A_SUB_MPAGE: 2481 case CDL_T2B_SUB_MPAGE: 2482 case ATA_FEATURE_SUB_MPAGE: 2483 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2484 break; 2485 fallthrough; 2486 default: 2487 fp = 3; 2488 goto invalid_fld; 2489 } 2490 } 2491 2492 switch(pg) { 2493 case RW_RECOVERY_MPAGE: 2494 p += ata_msense_rw_recovery(p, page_control == 1); 2495 break; 2496 2497 case CACHE_MPAGE: 2498 p += ata_msense_caching(args->id, p, page_control == 1); 2499 break; 2500 2501 case CONTROL_MPAGE: 2502 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2503 break; 2504 2505 case ALL_MPAGES: 2506 p += ata_msense_rw_recovery(p, page_control == 1); 2507 p += ata_msense_caching(args->id, p, page_control == 1); 2508 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2509 break; 2510 2511 default: /* invalid page code */ 2512 fp = 2; 2513 goto invalid_fld; 2514 } 2515 2516 if (dev->flags & ATA_DFLAG_FUA) 2517 dpofua = 1 << 4; 2518 2519 if (six_byte) { 2520 rbuf[0] = p - rbuf - 1; 2521 rbuf[2] |= dpofua; 2522 if (ebd) { 2523 rbuf[3] = sizeof(sat_blk_desc); 2524 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2525 } 2526 } else { 2527 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2528 rbuf[3] |= dpofua; 2529 if (ebd) { 2530 rbuf[7] = sizeof(sat_blk_desc); 2531 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2532 } 2533 } 2534 return 0; 2535 2536 invalid_fld: 2537 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2538 return 1; 2539 2540 saving_not_supp: 2541 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2542 /* "Saving parameters not supported" */ 2543 return 1; 2544 } 2545 2546 /** 2547 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2548 * @args: device IDENTIFY data / SCSI command of interest. 2549 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2550 * 2551 * Simulate READ CAPACITY commands. 2552 * 2553 * LOCKING: 2554 * None. 2555 */ 2556 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2557 { 2558 struct ata_device *dev = args->dev; 2559 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2560 u32 sector_size; /* physical sector size in bytes */ 2561 u8 log2_per_phys; 2562 u16 lowest_aligned; 2563 2564 sector_size = ata_id_logical_sector_size(dev->id); 2565 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2566 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2567 2568 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2569 if (last_lba >= 0xffffffffULL) 2570 last_lba = 0xffffffff; 2571 2572 /* sector count, 32-bit */ 2573 rbuf[0] = last_lba >> (8 * 3); 2574 rbuf[1] = last_lba >> (8 * 2); 2575 rbuf[2] = last_lba >> (8 * 1); 2576 rbuf[3] = last_lba; 2577 2578 /* sector size */ 2579 rbuf[4] = sector_size >> (8 * 3); 2580 rbuf[5] = sector_size >> (8 * 2); 2581 rbuf[6] = sector_size >> (8 * 1); 2582 rbuf[7] = sector_size; 2583 } else { 2584 /* sector count, 64-bit */ 2585 rbuf[0] = last_lba >> (8 * 7); 2586 rbuf[1] = last_lba >> (8 * 6); 2587 rbuf[2] = last_lba >> (8 * 5); 2588 rbuf[3] = last_lba >> (8 * 4); 2589 rbuf[4] = last_lba >> (8 * 3); 2590 rbuf[5] = last_lba >> (8 * 2); 2591 rbuf[6] = last_lba >> (8 * 1); 2592 rbuf[7] = last_lba; 2593 2594 /* sector size */ 2595 rbuf[ 8] = sector_size >> (8 * 3); 2596 rbuf[ 9] = sector_size >> (8 * 2); 2597 rbuf[10] = sector_size >> (8 * 1); 2598 rbuf[11] = sector_size; 2599 2600 rbuf[12] = 0; 2601 rbuf[13] = log2_per_phys; 2602 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2603 rbuf[15] = lowest_aligned; 2604 2605 if (ata_id_has_trim(args->id) && 2606 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2607 rbuf[14] |= 0x80; /* LBPME */ 2608 2609 if (ata_id_has_zero_after_trim(args->id) && 2610 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2611 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2612 rbuf[14] |= 0x40; /* LBPRZ */ 2613 } 2614 } 2615 if (ata_id_zoned_cap(args->id) || 2616 args->dev->class == ATA_DEV_ZAC) 2617 rbuf[12] = (1 << 4); /* RC_BASIS */ 2618 } 2619 return 0; 2620 } 2621 2622 /** 2623 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2624 * @args: device IDENTIFY data / SCSI command of interest. 2625 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2626 * 2627 * Simulate REPORT LUNS command. 2628 * 2629 * LOCKING: 2630 * spin_lock_irqsave(host lock) 2631 */ 2632 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2633 { 2634 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2635 2636 return 0; 2637 } 2638 2639 /* 2640 * ATAPI devices typically report zero for their SCSI version, and sometimes 2641 * deviate from the spec WRT response data format. If SCSI version is 2642 * reported as zero like normal, then we make the following fixups: 2643 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2644 * modern device. 2645 * 2) Ensure response data format / ATAPI information are always correct. 2646 */ 2647 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2648 { 2649 u8 buf[4]; 2650 2651 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2652 if (buf[2] == 0) { 2653 buf[2] = 0x5; 2654 buf[3] = 0x32; 2655 } 2656 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2657 } 2658 2659 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2660 { 2661 struct scsi_cmnd *cmd = qc->scsicmd; 2662 unsigned int err_mask = qc->err_mask; 2663 2664 /* handle completion from EH */ 2665 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2666 2667 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2668 ata_gen_passthru_sense(qc); 2669 2670 /* SCSI EH automatically locks door if sdev->locked is 2671 * set. Sometimes door lock request continues to 2672 * fail, for example, when no media is present. This 2673 * creates a loop - SCSI EH issues door lock which 2674 * fails and gets invoked again to acquire sense data 2675 * for the failed command. 2676 * 2677 * If door lock fails, always clear sdev->locked to 2678 * avoid this infinite loop. 2679 * 2680 * This may happen before SCSI scan is complete. Make 2681 * sure qc->dev->sdev isn't NULL before dereferencing. 2682 */ 2683 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2684 qc->dev->sdev->locked = 0; 2685 2686 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2687 ata_qc_done(qc); 2688 return; 2689 } 2690 2691 /* successful completion path */ 2692 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2693 atapi_fixup_inquiry(cmd); 2694 cmd->result = SAM_STAT_GOOD; 2695 2696 ata_qc_done(qc); 2697 } 2698 /** 2699 * atapi_xlat - Initialize PACKET taskfile 2700 * @qc: command structure to be initialized 2701 * 2702 * LOCKING: 2703 * spin_lock_irqsave(host lock) 2704 * 2705 * RETURNS: 2706 * Zero on success, non-zero on failure. 2707 */ 2708 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2709 { 2710 struct scsi_cmnd *scmd = qc->scsicmd; 2711 struct ata_device *dev = qc->dev; 2712 int nodata = (scmd->sc_data_direction == DMA_NONE); 2713 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2714 unsigned int nbytes; 2715 2716 memset(qc->cdb, 0, dev->cdb_len); 2717 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2718 2719 qc->complete_fn = atapi_qc_complete; 2720 2721 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2722 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2723 qc->tf.flags |= ATA_TFLAG_WRITE; 2724 } 2725 2726 qc->tf.command = ATA_CMD_PACKET; 2727 ata_qc_set_pc_nbytes(qc); 2728 2729 /* check whether ATAPI DMA is safe */ 2730 if (!nodata && !using_pio && atapi_check_dma(qc)) 2731 using_pio = 1; 2732 2733 /* Some controller variants snoop this value for Packet 2734 * transfers to do state machine and FIFO management. Thus we 2735 * want to set it properly, and for DMA where it is 2736 * effectively meaningless. 2737 */ 2738 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2739 2740 /* Most ATAPI devices which honor transfer chunk size don't 2741 * behave according to the spec when odd chunk size which 2742 * matches the transfer length is specified. If the number of 2743 * bytes to transfer is 2n+1. According to the spec, what 2744 * should happen is to indicate that 2n+1 is going to be 2745 * transferred and transfer 2n+2 bytes where the last byte is 2746 * padding. 2747 * 2748 * In practice, this doesn't happen. ATAPI devices first 2749 * indicate and transfer 2n bytes and then indicate and 2750 * transfer 2 bytes where the last byte is padding. 2751 * 2752 * This inconsistency confuses several controllers which 2753 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2754 * These controllers use actual number of transferred bytes to 2755 * update DMA pointer and transfer of 4n+2 bytes make those 2756 * controller push DMA pointer by 4n+4 bytes because SATA data 2757 * FISes are aligned to 4 bytes. This causes data corruption 2758 * and buffer overrun. 2759 * 2760 * Always setting nbytes to even number solves this problem 2761 * because then ATAPI devices don't have to split data at 2n 2762 * boundaries. 2763 */ 2764 if (nbytes & 0x1) 2765 nbytes++; 2766 2767 qc->tf.lbam = (nbytes & 0xFF); 2768 qc->tf.lbah = (nbytes >> 8); 2769 2770 if (nodata) 2771 qc->tf.protocol = ATAPI_PROT_NODATA; 2772 else if (using_pio) 2773 qc->tf.protocol = ATAPI_PROT_PIO; 2774 else { 2775 /* DMA data xfer */ 2776 qc->tf.protocol = ATAPI_PROT_DMA; 2777 qc->tf.feature |= ATAPI_PKT_DMA; 2778 2779 if ((dev->flags & ATA_DFLAG_DMADIR) && 2780 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2781 /* some SATA bridges need us to indicate data xfer direction */ 2782 qc->tf.feature |= ATAPI_DMADIR; 2783 } 2784 2785 2786 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2787 as ATAPI tape drives don't get this right otherwise */ 2788 return 0; 2789 } 2790 2791 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 2792 { 2793 /* 2794 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 2795 * or 2 (IDE master + slave case). However, the former case includes 2796 * libsas hosted devices which are numbered per scsi host, leading 2797 * to devno potentially being larger than 0 but with each struct 2798 * ata_device having its own struct ata_port and struct ata_link. 2799 * To accommodate these, ignore devno and always use device number 0. 2800 */ 2801 if (likely(!sata_pmp_attached(ap))) { 2802 int link_max_devices = ata_link_max_devices(&ap->link); 2803 2804 if (link_max_devices == 1) 2805 return &ap->link.device[0]; 2806 2807 if (devno < link_max_devices) 2808 return &ap->link.device[devno]; 2809 2810 return NULL; 2811 } 2812 2813 /* 2814 * For PMP-attached devices, the device number corresponds to C 2815 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 2816 * for the device. 2817 */ 2818 if (devno < ap->nr_pmp_links) 2819 return &ap->pmp_link[devno].device[0]; 2820 2821 return NULL; 2822 } 2823 2824 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2825 const struct scsi_device *scsidev) 2826 { 2827 int devno; 2828 2829 /* skip commands not addressed to targets we simulate */ 2830 if (!sata_pmp_attached(ap)) { 2831 if (unlikely(scsidev->channel || scsidev->lun)) 2832 return NULL; 2833 devno = scsidev->id; 2834 } else { 2835 if (unlikely(scsidev->id || scsidev->lun)) 2836 return NULL; 2837 devno = scsidev->channel; 2838 } 2839 2840 return ata_find_dev(ap, devno); 2841 } 2842 2843 /** 2844 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2845 * @ap: ATA port to which the device is attached 2846 * @scsidev: SCSI device from which we derive the ATA device 2847 * 2848 * Given various information provided in struct scsi_cmnd, 2849 * map that onto an ATA bus, and using that mapping 2850 * determine which ata_device is associated with the 2851 * SCSI command to be sent. 2852 * 2853 * LOCKING: 2854 * spin_lock_irqsave(host lock) 2855 * 2856 * RETURNS: 2857 * Associated ATA device, or %NULL if not found. 2858 */ 2859 struct ata_device * 2860 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2861 { 2862 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2863 2864 if (unlikely(!dev || !ata_dev_enabled(dev))) 2865 return NULL; 2866 2867 return dev; 2868 } 2869 2870 /* 2871 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2872 * @byte1: Byte 1 from pass-thru CDB. 2873 * 2874 * RETURNS: 2875 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2876 */ 2877 static u8 2878 ata_scsi_map_proto(u8 byte1) 2879 { 2880 switch((byte1 & 0x1e) >> 1) { 2881 case 3: /* Non-data */ 2882 return ATA_PROT_NODATA; 2883 2884 case 6: /* DMA */ 2885 case 10: /* UDMA Data-in */ 2886 case 11: /* UDMA Data-Out */ 2887 return ATA_PROT_DMA; 2888 2889 case 4: /* PIO Data-in */ 2890 case 5: /* PIO Data-out */ 2891 return ATA_PROT_PIO; 2892 2893 case 12: /* FPDMA */ 2894 return ATA_PROT_NCQ; 2895 2896 case 0: /* Hard Reset */ 2897 case 1: /* SRST */ 2898 case 8: /* Device Diagnostic */ 2899 case 9: /* Device Reset */ 2900 case 7: /* DMA Queued */ 2901 case 15: /* Return Response Info */ 2902 default: /* Reserved */ 2903 break; 2904 } 2905 2906 return ATA_PROT_UNKNOWN; 2907 } 2908 2909 /** 2910 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2911 * @qc: command structure to be initialized 2912 * 2913 * Handles either 12, 16, or 32-byte versions of the CDB. 2914 * 2915 * RETURNS: 2916 * Zero on success, non-zero on failure. 2917 */ 2918 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2919 { 2920 struct ata_taskfile *tf = &(qc->tf); 2921 struct scsi_cmnd *scmd = qc->scsicmd; 2922 struct ata_device *dev = qc->dev; 2923 const u8 *cdb = scmd->cmnd; 2924 u16 fp; 2925 u16 cdb_offset = 0; 2926 2927 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2928 if (cdb[0] == VARIABLE_LENGTH_CMD) 2929 cdb_offset = 9; 2930 2931 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2932 if (tf->protocol == ATA_PROT_UNKNOWN) { 2933 fp = 1; 2934 goto invalid_fld; 2935 } 2936 2937 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 2938 /* 2939 * When T_LENGTH is zero (No data is transferred), dir should 2940 * be DMA_NONE. 2941 */ 2942 if (scmd->sc_data_direction != DMA_NONE) { 2943 fp = 2 + cdb_offset; 2944 goto invalid_fld; 2945 } 2946 2947 if (ata_is_ncq(tf->protocol)) 2948 tf->protocol = ATA_PROT_NCQ_NODATA; 2949 } 2950 2951 /* enable LBA */ 2952 tf->flags |= ATA_TFLAG_LBA; 2953 2954 /* 2955 * 12 and 16 byte CDBs use different offsets to 2956 * provide the various register values. 2957 */ 2958 switch (cdb[0]) { 2959 case ATA_16: 2960 /* 2961 * 16-byte CDB - may contain extended commands. 2962 * 2963 * If that is the case, copy the upper byte register values. 2964 */ 2965 if (cdb[1] & 0x01) { 2966 tf->hob_feature = cdb[3]; 2967 tf->hob_nsect = cdb[5]; 2968 tf->hob_lbal = cdb[7]; 2969 tf->hob_lbam = cdb[9]; 2970 tf->hob_lbah = cdb[11]; 2971 tf->flags |= ATA_TFLAG_LBA48; 2972 } else 2973 tf->flags &= ~ATA_TFLAG_LBA48; 2974 2975 /* 2976 * Always copy low byte, device and command registers. 2977 */ 2978 tf->feature = cdb[4]; 2979 tf->nsect = cdb[6]; 2980 tf->lbal = cdb[8]; 2981 tf->lbam = cdb[10]; 2982 tf->lbah = cdb[12]; 2983 tf->device = cdb[13]; 2984 tf->command = cdb[14]; 2985 break; 2986 case ATA_12: 2987 /* 2988 * 12-byte CDB - incapable of extended commands. 2989 */ 2990 tf->flags &= ~ATA_TFLAG_LBA48; 2991 2992 tf->feature = cdb[3]; 2993 tf->nsect = cdb[4]; 2994 tf->lbal = cdb[5]; 2995 tf->lbam = cdb[6]; 2996 tf->lbah = cdb[7]; 2997 tf->device = cdb[8]; 2998 tf->command = cdb[9]; 2999 break; 3000 default: 3001 /* 3002 * 32-byte CDB - may contain extended command fields. 3003 * 3004 * If that is the case, copy the upper byte register values. 3005 */ 3006 if (cdb[10] & 0x01) { 3007 tf->hob_feature = cdb[20]; 3008 tf->hob_nsect = cdb[22]; 3009 tf->hob_lbal = cdb[16]; 3010 tf->hob_lbam = cdb[15]; 3011 tf->hob_lbah = cdb[14]; 3012 tf->flags |= ATA_TFLAG_LBA48; 3013 } else 3014 tf->flags &= ~ATA_TFLAG_LBA48; 3015 3016 tf->feature = cdb[21]; 3017 tf->nsect = cdb[23]; 3018 tf->lbal = cdb[19]; 3019 tf->lbam = cdb[18]; 3020 tf->lbah = cdb[17]; 3021 tf->device = cdb[24]; 3022 tf->command = cdb[25]; 3023 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3024 break; 3025 } 3026 3027 /* For NCQ commands copy the tag value */ 3028 if (ata_is_ncq(tf->protocol)) 3029 tf->nsect = qc->hw_tag << 3; 3030 3031 /* enforce correct master/slave bit */ 3032 tf->device = dev->devno ? 3033 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3034 3035 switch (tf->command) { 3036 /* READ/WRITE LONG use a non-standard sect_size */ 3037 case ATA_CMD_READ_LONG: 3038 case ATA_CMD_READ_LONG_ONCE: 3039 case ATA_CMD_WRITE_LONG: 3040 case ATA_CMD_WRITE_LONG_ONCE: 3041 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3042 fp = 1; 3043 goto invalid_fld; 3044 } 3045 qc->sect_size = scsi_bufflen(scmd); 3046 break; 3047 3048 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3049 case ATA_CMD_CFA_WRITE_NE: 3050 case ATA_CMD_CFA_TRANS_SECT: 3051 case ATA_CMD_CFA_WRITE_MULT_NE: 3052 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3053 case ATA_CMD_READ: 3054 case ATA_CMD_READ_EXT: 3055 case ATA_CMD_READ_QUEUED: 3056 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3057 case ATA_CMD_FPDMA_READ: 3058 case ATA_CMD_READ_MULTI: 3059 case ATA_CMD_READ_MULTI_EXT: 3060 case ATA_CMD_PIO_READ: 3061 case ATA_CMD_PIO_READ_EXT: 3062 case ATA_CMD_READ_STREAM_DMA_EXT: 3063 case ATA_CMD_READ_STREAM_EXT: 3064 case ATA_CMD_VERIFY: 3065 case ATA_CMD_VERIFY_EXT: 3066 case ATA_CMD_WRITE: 3067 case ATA_CMD_WRITE_EXT: 3068 case ATA_CMD_WRITE_FUA_EXT: 3069 case ATA_CMD_WRITE_QUEUED: 3070 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3071 case ATA_CMD_FPDMA_WRITE: 3072 case ATA_CMD_WRITE_MULTI: 3073 case ATA_CMD_WRITE_MULTI_EXT: 3074 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3075 case ATA_CMD_PIO_WRITE: 3076 case ATA_CMD_PIO_WRITE_EXT: 3077 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3078 case ATA_CMD_WRITE_STREAM_EXT: 3079 qc->sect_size = scmd->device->sector_size; 3080 break; 3081 3082 /* Everything else uses 512 byte "sectors" */ 3083 default: 3084 qc->sect_size = ATA_SECT_SIZE; 3085 } 3086 3087 /* 3088 * Set flags so that all registers will be written, pass on 3089 * write indication (used for PIO/DMA setup), result TF is 3090 * copied back and we don't whine too much about its failure. 3091 */ 3092 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3093 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3094 tf->flags |= ATA_TFLAG_WRITE; 3095 3096 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3097 3098 /* 3099 * Set transfer length. 3100 * 3101 * TODO: find out if we need to do more here to 3102 * cover scatter/gather case. 3103 */ 3104 ata_qc_set_pc_nbytes(qc); 3105 3106 /* We may not issue DMA commands if no DMA mode is set */ 3107 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3108 fp = 1; 3109 goto invalid_fld; 3110 } 3111 3112 /* We may not issue NCQ commands to devices not supporting NCQ */ 3113 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3114 fp = 1; 3115 goto invalid_fld; 3116 } 3117 3118 /* sanity check for pio multi commands */ 3119 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3120 fp = 1; 3121 goto invalid_fld; 3122 } 3123 3124 if (is_multi_taskfile(tf)) { 3125 unsigned int multi_count = 1 << (cdb[1] >> 5); 3126 3127 /* compare the passed through multi_count 3128 * with the cached multi_count of libata 3129 */ 3130 if (multi_count != dev->multi_count) 3131 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3132 multi_count); 3133 } 3134 3135 /* 3136 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3137 * SET_FEATURES - XFER MODE must be preceded/succeeded 3138 * by an update to hardware-specific registers for each 3139 * controller (i.e. the reason for ->set_piomode(), 3140 * ->set_dmamode(), and ->post_set_mode() hooks). 3141 */ 3142 if (tf->command == ATA_CMD_SET_FEATURES && 3143 tf->feature == SETFEATURES_XFER) { 3144 fp = (cdb[0] == ATA_16) ? 4 : 3; 3145 goto invalid_fld; 3146 } 3147 3148 /* 3149 * Filter TPM commands by default. These provide an 3150 * essentially uncontrolled encrypted "back door" between 3151 * applications and the disk. Set libata.allow_tpm=1 if you 3152 * have a real reason for wanting to use them. This ensures 3153 * that installed software cannot easily mess stuff up without 3154 * user intent. DVR type users will probably ship with this enabled 3155 * for movie content management. 3156 * 3157 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3158 * for this and should do in future but that it is not sufficient as 3159 * DCS is an optional feature set. Thus we also do the software filter 3160 * so that we comply with the TC consortium stated goal that the user 3161 * can turn off TC features of their system. 3162 */ 3163 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3164 fp = (cdb[0] == ATA_16) ? 14 : 9; 3165 goto invalid_fld; 3166 } 3167 3168 return 0; 3169 3170 invalid_fld: 3171 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3172 return 1; 3173 } 3174 3175 /** 3176 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3177 * @cmd: SCSI command being translated 3178 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3179 * @sector: Starting sector 3180 * @count: Total Range of request in logical sectors 3181 * 3182 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3183 * descriptor. 3184 * 3185 * Upto 64 entries of the format: 3186 * 63:48 Range Length 3187 * 47:0 LBA 3188 * 3189 * Range Length of 0 is ignored. 3190 * LBA's should be sorted order and not overlap. 3191 * 3192 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3193 * 3194 * Return: Number of bytes copied into sglist. 3195 */ 3196 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3197 u64 sector, u32 count) 3198 { 3199 struct scsi_device *sdp = cmd->device; 3200 size_t len = sdp->sector_size; 3201 size_t r; 3202 __le64 *buf; 3203 u32 i = 0; 3204 unsigned long flags; 3205 3206 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3207 3208 if (len > ATA_SCSI_RBUF_SIZE) 3209 len = ATA_SCSI_RBUF_SIZE; 3210 3211 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3212 buf = ((void *)ata_scsi_rbuf); 3213 memset(buf, 0, len); 3214 while (i < trmax) { 3215 u64 entry = sector | 3216 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3217 buf[i++] = __cpu_to_le64(entry); 3218 if (count <= 0xffff) 3219 break; 3220 count -= 0xffff; 3221 sector += 0xffff; 3222 } 3223 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3224 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3225 3226 return r; 3227 } 3228 3229 /** 3230 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3231 * @qc: Command to be translated 3232 * 3233 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3234 * an SCT Write Same command. 3235 * Based on WRITE SAME has the UNMAP flag: 3236 * 3237 * - When set translate to DSM TRIM 3238 * - When clear translate to SCT Write Same 3239 */ 3240 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3241 { 3242 struct ata_taskfile *tf = &qc->tf; 3243 struct scsi_cmnd *scmd = qc->scsicmd; 3244 struct scsi_device *sdp = scmd->device; 3245 size_t len = sdp->sector_size; 3246 struct ata_device *dev = qc->dev; 3247 const u8 *cdb = scmd->cmnd; 3248 u64 block; 3249 u32 n_block; 3250 const u32 trmax = len >> 3; 3251 u32 size; 3252 u16 fp; 3253 u8 bp = 0xff; 3254 u8 unmap = cdb[1] & 0x8; 3255 3256 /* we may not issue DMA commands if no DMA mode is set */ 3257 if (unlikely(!ata_dma_enabled(dev))) 3258 goto invalid_opcode; 3259 3260 /* 3261 * We only allow sending this command through the block layer, 3262 * as it modifies the DATA OUT buffer, which would corrupt user 3263 * memory for SG_IO commands. 3264 */ 3265 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3266 goto invalid_opcode; 3267 3268 if (unlikely(scmd->cmd_len < 16)) { 3269 fp = 15; 3270 goto invalid_fld; 3271 } 3272 scsi_16_lba_len(cdb, &block, &n_block); 3273 3274 if (!unmap || 3275 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3276 !ata_id_has_trim(dev->id)) { 3277 fp = 1; 3278 bp = 3; 3279 goto invalid_fld; 3280 } 3281 /* If the request is too large the cmd is invalid */ 3282 if (n_block > 0xffff * trmax) { 3283 fp = 2; 3284 goto invalid_fld; 3285 } 3286 3287 /* 3288 * WRITE SAME always has a sector sized buffer as payload, this 3289 * should never be a multiple entry S/G list. 3290 */ 3291 if (!scsi_sg_count(scmd)) 3292 goto invalid_param_len; 3293 3294 /* 3295 * size must match sector size in bytes 3296 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3297 * is defined as number of 512 byte blocks to be transferred. 3298 */ 3299 3300 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3301 if (size != len) 3302 goto invalid_param_len; 3303 3304 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3305 /* Newer devices support queued TRIM commands */ 3306 tf->protocol = ATA_PROT_NCQ; 3307 tf->command = ATA_CMD_FPDMA_SEND; 3308 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3309 tf->nsect = qc->hw_tag << 3; 3310 tf->hob_feature = (size / 512) >> 8; 3311 tf->feature = size / 512; 3312 3313 tf->auxiliary = 1; 3314 } else { 3315 tf->protocol = ATA_PROT_DMA; 3316 tf->hob_feature = 0; 3317 tf->feature = ATA_DSM_TRIM; 3318 tf->hob_nsect = (size / 512) >> 8; 3319 tf->nsect = size / 512; 3320 tf->command = ATA_CMD_DSM; 3321 } 3322 3323 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3324 ATA_TFLAG_WRITE; 3325 3326 ata_qc_set_pc_nbytes(qc); 3327 3328 return 0; 3329 3330 invalid_fld: 3331 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3332 return 1; 3333 invalid_param_len: 3334 /* "Parameter list length error" */ 3335 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3336 return 1; 3337 invalid_opcode: 3338 /* "Invalid command operation code" */ 3339 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3340 return 1; 3341 } 3342 3343 /** 3344 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3345 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3346 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3347 * 3348 * Yields a subset to satisfy scsi_report_opcode() 3349 * 3350 * LOCKING: 3351 * spin_lock_irqsave(host lock) 3352 */ 3353 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3354 { 3355 struct ata_device *dev = args->dev; 3356 u8 *cdb = args->cmd->cmnd; 3357 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3358 unsigned int err = 0; 3359 3360 if (cdb[2] != 1 && cdb[2] != 3) { 3361 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3362 err = 2; 3363 goto out; 3364 } 3365 3366 switch (cdb[3]) { 3367 case INQUIRY: 3368 case MODE_SENSE: 3369 case MODE_SENSE_10: 3370 case READ_CAPACITY: 3371 case SERVICE_ACTION_IN_16: 3372 case REPORT_LUNS: 3373 case REQUEST_SENSE: 3374 case SYNCHRONIZE_CACHE: 3375 case SYNCHRONIZE_CACHE_16: 3376 case REZERO_UNIT: 3377 case SEEK_6: 3378 case SEEK_10: 3379 case TEST_UNIT_READY: 3380 case SEND_DIAGNOSTIC: 3381 case MAINTENANCE_IN: 3382 case READ_6: 3383 case READ_10: 3384 case WRITE_6: 3385 case WRITE_10: 3386 case ATA_12: 3387 case ATA_16: 3388 case VERIFY: 3389 case VERIFY_16: 3390 case MODE_SELECT: 3391 case MODE_SELECT_10: 3392 case START_STOP: 3393 supported = 3; 3394 break; 3395 case READ_16: 3396 supported = 3; 3397 if (dev->flags & ATA_DFLAG_CDL) { 3398 /* 3399 * CDL read descriptors map to the T2A page, that is, 3400 * rwcdlp = 0x01 and cdlp = 0x01 3401 */ 3402 rwcdlp = 0x01; 3403 cdlp = 0x01 << 3; 3404 } 3405 break; 3406 case WRITE_16: 3407 supported = 3; 3408 if (dev->flags & ATA_DFLAG_CDL) { 3409 /* 3410 * CDL write descriptors map to the T2B page, that is, 3411 * rwcdlp = 0x01 and cdlp = 0x02 3412 */ 3413 rwcdlp = 0x01; 3414 cdlp = 0x02 << 3; 3415 } 3416 break; 3417 case ZBC_IN: 3418 case ZBC_OUT: 3419 if (ata_id_zoned_cap(dev->id) || 3420 dev->class == ATA_DEV_ZAC) 3421 supported = 3; 3422 break; 3423 case SECURITY_PROTOCOL_IN: 3424 case SECURITY_PROTOCOL_OUT: 3425 if (dev->flags & ATA_DFLAG_TRUSTED) 3426 supported = 3; 3427 break; 3428 default: 3429 break; 3430 } 3431 out: 3432 /* One command format */ 3433 rbuf[0] = rwcdlp; 3434 rbuf[1] = cdlp | supported; 3435 return err; 3436 } 3437 3438 /** 3439 * ata_scsi_report_zones_complete - convert ATA output 3440 * @qc: command structure returning the data 3441 * 3442 * Convert T-13 little-endian field representation into 3443 * T-10 big-endian field representation. 3444 * What a mess. 3445 */ 3446 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3447 { 3448 struct scsi_cmnd *scmd = qc->scsicmd; 3449 struct sg_mapping_iter miter; 3450 unsigned long flags; 3451 unsigned int bytes = 0; 3452 3453 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3454 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3455 3456 local_irq_save(flags); 3457 while (sg_miter_next(&miter)) { 3458 unsigned int offset = 0; 3459 3460 if (bytes == 0) { 3461 char *hdr; 3462 u32 list_length; 3463 u64 max_lba, opt_lba; 3464 u16 same; 3465 3466 /* Swizzle header */ 3467 hdr = miter.addr; 3468 list_length = get_unaligned_le32(&hdr[0]); 3469 same = get_unaligned_le16(&hdr[4]); 3470 max_lba = get_unaligned_le64(&hdr[8]); 3471 opt_lba = get_unaligned_le64(&hdr[16]); 3472 put_unaligned_be32(list_length, &hdr[0]); 3473 hdr[4] = same & 0xf; 3474 put_unaligned_be64(max_lba, &hdr[8]); 3475 put_unaligned_be64(opt_lba, &hdr[16]); 3476 offset += 64; 3477 bytes += 64; 3478 } 3479 while (offset < miter.length) { 3480 char *rec; 3481 u8 cond, type, non_seq, reset; 3482 u64 size, start, wp; 3483 3484 /* Swizzle zone descriptor */ 3485 rec = miter.addr + offset; 3486 type = rec[0] & 0xf; 3487 cond = (rec[1] >> 4) & 0xf; 3488 non_seq = (rec[1] & 2); 3489 reset = (rec[1] & 1); 3490 size = get_unaligned_le64(&rec[8]); 3491 start = get_unaligned_le64(&rec[16]); 3492 wp = get_unaligned_le64(&rec[24]); 3493 rec[0] = type; 3494 rec[1] = (cond << 4) | non_seq | reset; 3495 put_unaligned_be64(size, &rec[8]); 3496 put_unaligned_be64(start, &rec[16]); 3497 put_unaligned_be64(wp, &rec[24]); 3498 WARN_ON(offset + 64 > miter.length); 3499 offset += 64; 3500 bytes += 64; 3501 } 3502 } 3503 sg_miter_stop(&miter); 3504 local_irq_restore(flags); 3505 3506 ata_scsi_qc_complete(qc); 3507 } 3508 3509 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3510 { 3511 struct ata_taskfile *tf = &qc->tf; 3512 struct scsi_cmnd *scmd = qc->scsicmd; 3513 const u8 *cdb = scmd->cmnd; 3514 u16 sect, fp = (u16)-1; 3515 u8 sa, options, bp = 0xff; 3516 u64 block; 3517 u32 n_block; 3518 3519 if (unlikely(scmd->cmd_len < 16)) { 3520 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3521 scmd->cmd_len); 3522 fp = 15; 3523 goto invalid_fld; 3524 } 3525 scsi_16_lba_len(cdb, &block, &n_block); 3526 if (n_block != scsi_bufflen(scmd)) { 3527 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3528 n_block, scsi_bufflen(scmd)); 3529 goto invalid_param_len; 3530 } 3531 sa = cdb[1] & 0x1f; 3532 if (sa != ZI_REPORT_ZONES) { 3533 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3534 fp = 1; 3535 goto invalid_fld; 3536 } 3537 /* 3538 * ZAC allows only for transfers in 512 byte blocks, 3539 * and uses a 16 bit value for the transfer count. 3540 */ 3541 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3542 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3543 goto invalid_param_len; 3544 } 3545 sect = n_block / 512; 3546 options = cdb[14] & 0xbf; 3547 3548 if (ata_ncq_enabled(qc->dev) && 3549 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3550 tf->protocol = ATA_PROT_NCQ; 3551 tf->command = ATA_CMD_FPDMA_RECV; 3552 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3553 tf->nsect = qc->hw_tag << 3; 3554 tf->feature = sect & 0xff; 3555 tf->hob_feature = (sect >> 8) & 0xff; 3556 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3557 } else { 3558 tf->command = ATA_CMD_ZAC_MGMT_IN; 3559 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3560 tf->protocol = ATA_PROT_DMA; 3561 tf->hob_feature = options; 3562 tf->hob_nsect = (sect >> 8) & 0xff; 3563 tf->nsect = sect & 0xff; 3564 } 3565 tf->device = ATA_LBA; 3566 tf->lbah = (block >> 16) & 0xff; 3567 tf->lbam = (block >> 8) & 0xff; 3568 tf->lbal = block & 0xff; 3569 tf->hob_lbah = (block >> 40) & 0xff; 3570 tf->hob_lbam = (block >> 32) & 0xff; 3571 tf->hob_lbal = (block >> 24) & 0xff; 3572 3573 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3574 qc->flags |= ATA_QCFLAG_RESULT_TF; 3575 3576 ata_qc_set_pc_nbytes(qc); 3577 3578 qc->complete_fn = ata_scsi_report_zones_complete; 3579 3580 return 0; 3581 3582 invalid_fld: 3583 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3584 return 1; 3585 3586 invalid_param_len: 3587 /* "Parameter list length error" */ 3588 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3589 return 1; 3590 } 3591 3592 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3593 { 3594 struct ata_taskfile *tf = &qc->tf; 3595 struct scsi_cmnd *scmd = qc->scsicmd; 3596 struct ata_device *dev = qc->dev; 3597 const u8 *cdb = scmd->cmnd; 3598 u8 all, sa; 3599 u64 block; 3600 u32 n_block; 3601 u16 fp = (u16)-1; 3602 3603 if (unlikely(scmd->cmd_len < 16)) { 3604 fp = 15; 3605 goto invalid_fld; 3606 } 3607 3608 sa = cdb[1] & 0x1f; 3609 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3610 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3611 fp = 1; 3612 goto invalid_fld; 3613 } 3614 3615 scsi_16_lba_len(cdb, &block, &n_block); 3616 if (n_block) { 3617 /* 3618 * ZAC MANAGEMENT OUT doesn't define any length 3619 */ 3620 goto invalid_param_len; 3621 } 3622 3623 all = cdb[14] & 0x1; 3624 if (all) { 3625 /* 3626 * Ignore the block address (zone ID) as defined by ZBC. 3627 */ 3628 block = 0; 3629 } else if (block >= dev->n_sectors) { 3630 /* 3631 * Block must be a valid zone ID (a zone start LBA). 3632 */ 3633 fp = 2; 3634 goto invalid_fld; 3635 } 3636 3637 if (ata_ncq_enabled(qc->dev) && 3638 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3639 tf->protocol = ATA_PROT_NCQ_NODATA; 3640 tf->command = ATA_CMD_NCQ_NON_DATA; 3641 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3642 tf->nsect = qc->hw_tag << 3; 3643 tf->auxiliary = sa | ((u16)all << 8); 3644 } else { 3645 tf->protocol = ATA_PROT_NODATA; 3646 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3647 tf->feature = sa; 3648 tf->hob_feature = all; 3649 } 3650 tf->lbah = (block >> 16) & 0xff; 3651 tf->lbam = (block >> 8) & 0xff; 3652 tf->lbal = block & 0xff; 3653 tf->hob_lbah = (block >> 40) & 0xff; 3654 tf->hob_lbam = (block >> 32) & 0xff; 3655 tf->hob_lbal = (block >> 24) & 0xff; 3656 tf->device = ATA_LBA; 3657 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3658 3659 return 0; 3660 3661 invalid_fld: 3662 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3663 return 1; 3664 invalid_param_len: 3665 /* "Parameter list length error" */ 3666 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3667 return 1; 3668 } 3669 3670 /** 3671 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3672 * @qc: Storage for translated ATA taskfile 3673 * @buf: input buffer 3674 * @len: number of valid bytes in the input buffer 3675 * @fp: out parameter for the failed field on error 3676 * 3677 * Prepare a taskfile to modify caching information for the device. 3678 * 3679 * LOCKING: 3680 * None. 3681 */ 3682 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3683 const u8 *buf, int len, u16 *fp) 3684 { 3685 struct ata_taskfile *tf = &qc->tf; 3686 struct ata_device *dev = qc->dev; 3687 u8 mpage[CACHE_MPAGE_LEN]; 3688 u8 wce; 3689 int i; 3690 3691 /* 3692 * The first two bytes of def_cache_mpage are a header, so offsets 3693 * in mpage are off by 2 compared to buf. Same for len. 3694 */ 3695 3696 if (len != CACHE_MPAGE_LEN - 2) { 3697 *fp = min(len, CACHE_MPAGE_LEN - 2); 3698 return -EINVAL; 3699 } 3700 3701 wce = buf[0] & (1 << 2); 3702 3703 /* 3704 * Check that read-only bits are not modified. 3705 */ 3706 ata_msense_caching(dev->id, mpage, false); 3707 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3708 if (i == 0) 3709 continue; 3710 if (mpage[i + 2] != buf[i]) { 3711 *fp = i; 3712 return -EINVAL; 3713 } 3714 } 3715 3716 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3717 tf->protocol = ATA_PROT_NODATA; 3718 tf->nsect = 0; 3719 tf->command = ATA_CMD_SET_FEATURES; 3720 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3721 return 0; 3722 } 3723 3724 /* 3725 * Simulate MODE SELECT control mode page, sub-page 0. 3726 */ 3727 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3728 const u8 *buf, int len, u16 *fp) 3729 { 3730 struct ata_device *dev = qc->dev; 3731 u8 mpage[CONTROL_MPAGE_LEN]; 3732 u8 d_sense; 3733 int i; 3734 3735 /* 3736 * The first two bytes of def_control_mpage are a header, so offsets 3737 * in mpage are off by 2 compared to buf. Same for len. 3738 */ 3739 3740 if (len != CONTROL_MPAGE_LEN - 2) { 3741 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3742 return -EINVAL; 3743 } 3744 3745 d_sense = buf[0] & (1 << 2); 3746 3747 /* 3748 * Check that read-only bits are not modified. 3749 */ 3750 ata_msense_control_spg0(dev, mpage, false); 3751 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3752 if (i == 0) 3753 continue; 3754 if (mpage[2 + i] != buf[i]) { 3755 *fp = i; 3756 return -EINVAL; 3757 } 3758 } 3759 if (d_sense & (1 << 2)) 3760 dev->flags |= ATA_DFLAG_D_SENSE; 3761 else 3762 dev->flags &= ~ATA_DFLAG_D_SENSE; 3763 return 0; 3764 } 3765 3766 /* 3767 * Translate MODE SELECT control mode page, sub-pages f2h (ATA feature mode 3768 * page) into a SET FEATURES command. 3769 */ 3770 static unsigned int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 3771 const u8 *buf, int len, 3772 u16 *fp) 3773 { 3774 struct ata_device *dev = qc->dev; 3775 struct ata_taskfile *tf = &qc->tf; 3776 u8 cdl_action; 3777 3778 /* 3779 * The first four bytes of ATA Feature Control mode page are a header, 3780 * so offsets in mpage are off by 4 compared to buf. Same for len. 3781 */ 3782 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 3783 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 3784 return -EINVAL; 3785 } 3786 3787 /* Check cdl_ctrl */ 3788 switch (buf[0] & 0x03) { 3789 case 0: 3790 /* Disable CDL */ 3791 cdl_action = 0; 3792 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 3793 break; 3794 case 0x02: 3795 /* Enable CDL T2A/T2B: NCQ priority must be disabled */ 3796 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 3797 ata_dev_err(dev, 3798 "NCQ priority must be disabled to enable CDL\n"); 3799 return -EINVAL; 3800 } 3801 cdl_action = 1; 3802 dev->flags |= ATA_DFLAG_CDL_ENABLED; 3803 break; 3804 default: 3805 *fp = 0; 3806 return -EINVAL; 3807 } 3808 3809 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3810 tf->protocol = ATA_PROT_NODATA; 3811 tf->command = ATA_CMD_SET_FEATURES; 3812 tf->feature = SETFEATURES_CDL; 3813 tf->nsect = cdl_action; 3814 3815 return 1; 3816 } 3817 3818 /** 3819 * ata_mselect_control - Simulate MODE SELECT for control page 3820 * @qc: Storage for translated ATA taskfile 3821 * @spg: target sub-page of the control page 3822 * @buf: input buffer 3823 * @len: number of valid bytes in the input buffer 3824 * @fp: out parameter for the failed field on error 3825 * 3826 * Prepare a taskfile to modify caching information for the device. 3827 * 3828 * LOCKING: 3829 * None. 3830 */ 3831 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 3832 const u8 *buf, int len, u16 *fp) 3833 { 3834 switch (spg) { 3835 case 0: 3836 return ata_mselect_control_spg0(qc, buf, len, fp); 3837 case ATA_FEATURE_SUB_MPAGE: 3838 return ata_mselect_control_ata_feature(qc, buf, len, fp); 3839 default: 3840 return -EINVAL; 3841 } 3842 } 3843 3844 /** 3845 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3846 * @qc: Storage for translated ATA taskfile 3847 * 3848 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3849 * Assume this is invoked for direct access devices (e.g. disks) only. 3850 * There should be no block descriptor for other device types. 3851 * 3852 * LOCKING: 3853 * spin_lock_irqsave(host lock) 3854 */ 3855 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3856 { 3857 struct scsi_cmnd *scmd = qc->scsicmd; 3858 const u8 *cdb = scmd->cmnd; 3859 u8 pg, spg; 3860 unsigned six_byte, pg_len, hdr_len, bd_len; 3861 int len, ret; 3862 u16 fp = (u16)-1; 3863 u8 bp = 0xff; 3864 u8 buffer[64]; 3865 const u8 *p = buffer; 3866 3867 six_byte = (cdb[0] == MODE_SELECT); 3868 if (six_byte) { 3869 if (scmd->cmd_len < 5) { 3870 fp = 4; 3871 goto invalid_fld; 3872 } 3873 3874 len = cdb[4]; 3875 hdr_len = 4; 3876 } else { 3877 if (scmd->cmd_len < 9) { 3878 fp = 8; 3879 goto invalid_fld; 3880 } 3881 3882 len = get_unaligned_be16(&cdb[7]); 3883 hdr_len = 8; 3884 } 3885 3886 /* We only support PF=1, SP=0. */ 3887 if ((cdb[1] & 0x11) != 0x10) { 3888 fp = 1; 3889 bp = (cdb[1] & 0x01) ? 1 : 5; 3890 goto invalid_fld; 3891 } 3892 3893 /* Test early for possible overrun. */ 3894 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3895 goto invalid_param_len; 3896 3897 /* Move past header and block descriptors. */ 3898 if (len < hdr_len) 3899 goto invalid_param_len; 3900 3901 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3902 buffer, sizeof(buffer))) 3903 goto invalid_param_len; 3904 3905 if (six_byte) 3906 bd_len = p[3]; 3907 else 3908 bd_len = get_unaligned_be16(&p[6]); 3909 3910 len -= hdr_len; 3911 p += hdr_len; 3912 if (len < bd_len) 3913 goto invalid_param_len; 3914 if (bd_len != 0 && bd_len != 8) { 3915 fp = (six_byte) ? 3 : 6; 3916 fp += bd_len + hdr_len; 3917 goto invalid_param; 3918 } 3919 3920 len -= bd_len; 3921 p += bd_len; 3922 if (len == 0) 3923 goto skip; 3924 3925 /* Parse both possible formats for the mode page headers. */ 3926 pg = p[0] & 0x3f; 3927 if (p[0] & 0x40) { 3928 if (len < 4) 3929 goto invalid_param_len; 3930 3931 spg = p[1]; 3932 pg_len = get_unaligned_be16(&p[2]); 3933 p += 4; 3934 len -= 4; 3935 } else { 3936 if (len < 2) 3937 goto invalid_param_len; 3938 3939 spg = 0; 3940 pg_len = p[1]; 3941 p += 2; 3942 len -= 2; 3943 } 3944 3945 /* 3946 * Supported subpages: all subpages and ATA feature sub-page f2h of 3947 * the control page. 3948 */ 3949 if (spg) { 3950 switch (spg) { 3951 case ALL_SUB_MPAGES: 3952 /* All subpages is not supported for the control page */ 3953 if (pg == CONTROL_MPAGE) { 3954 fp = (p[0] & 0x40) ? 1 : 0; 3955 fp += hdr_len + bd_len; 3956 goto invalid_param; 3957 } 3958 break; 3959 case ATA_FEATURE_SUB_MPAGE: 3960 if (qc->dev->flags & ATA_DFLAG_CDL && 3961 pg == CONTROL_MPAGE) 3962 break; 3963 fallthrough; 3964 default: 3965 fp = (p[0] & 0x40) ? 1 : 0; 3966 fp += hdr_len + bd_len; 3967 goto invalid_param; 3968 } 3969 } 3970 if (pg_len > len) 3971 goto invalid_param_len; 3972 3973 switch (pg) { 3974 case CACHE_MPAGE: 3975 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3976 fp += hdr_len + bd_len; 3977 goto invalid_param; 3978 } 3979 break; 3980 case CONTROL_MPAGE: 3981 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 3982 if (ret < 0) { 3983 fp += hdr_len + bd_len; 3984 goto invalid_param; 3985 } 3986 if (!ret) 3987 goto skip; /* No ATA command to send */ 3988 break; 3989 default: 3990 /* Invalid page code */ 3991 fp = bd_len + hdr_len; 3992 goto invalid_param; 3993 } 3994 3995 /* 3996 * Only one page has changeable data, so we only support setting one 3997 * page at a time. 3998 */ 3999 if (len > pg_len) 4000 goto invalid_param; 4001 4002 return 0; 4003 4004 invalid_fld: 4005 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4006 return 1; 4007 4008 invalid_param: 4009 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4010 return 1; 4011 4012 invalid_param_len: 4013 /* "Parameter list length error" */ 4014 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4015 return 1; 4016 4017 skip: 4018 scmd->result = SAM_STAT_GOOD; 4019 return 1; 4020 } 4021 4022 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4023 { 4024 if (len == 0) 4025 return ATA_CMD_TRUSTED_NONDATA; 4026 else if (send) 4027 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4028 else 4029 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4030 } 4031 4032 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4033 { 4034 struct scsi_cmnd *scmd = qc->scsicmd; 4035 const u8 *cdb = scmd->cmnd; 4036 struct ata_taskfile *tf = &qc->tf; 4037 u8 secp = cdb[1]; 4038 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4039 u16 spsp = get_unaligned_be16(&cdb[2]); 4040 u32 len = get_unaligned_be32(&cdb[6]); 4041 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4042 4043 /* 4044 * We don't support the ATA "security" protocol. 4045 */ 4046 if (secp == 0xef) { 4047 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4048 return 1; 4049 } 4050 4051 if (cdb[4] & 7) { /* INC_512 */ 4052 if (len > 0xffff) { 4053 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4054 return 1; 4055 } 4056 } else { 4057 if (len > 0x01fffe00) { 4058 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4059 return 1; 4060 } 4061 4062 /* convert to the sector-based ATA addressing */ 4063 len = (len + 511) / 512; 4064 } 4065 4066 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4067 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4068 if (send) 4069 tf->flags |= ATA_TFLAG_WRITE; 4070 tf->command = ata_scsi_trusted_op(len, send, dma); 4071 tf->feature = secp; 4072 tf->lbam = spsp & 0xff; 4073 tf->lbah = spsp >> 8; 4074 4075 if (len) { 4076 tf->nsect = len & 0xff; 4077 tf->lbal = len >> 8; 4078 } else { 4079 if (!send) 4080 tf->lbah = (1 << 7); 4081 } 4082 4083 ata_qc_set_pc_nbytes(qc); 4084 return 0; 4085 } 4086 4087 /** 4088 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4089 * @qc: Command to be translated 4090 * 4091 * Translate a SCSI variable length CDB to specified commands. 4092 * It checks a service action value in CDB to call corresponding handler. 4093 * 4094 * RETURNS: 4095 * Zero on success, non-zero on failure 4096 * 4097 */ 4098 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4099 { 4100 struct scsi_cmnd *scmd = qc->scsicmd; 4101 const u8 *cdb = scmd->cmnd; 4102 const u16 sa = get_unaligned_be16(&cdb[8]); 4103 4104 /* 4105 * if service action represents a ata pass-thru(32) command, 4106 * then pass it to ata_scsi_pass_thru handler. 4107 */ 4108 if (sa == ATA_32) 4109 return ata_scsi_pass_thru(qc); 4110 4111 /* unsupported service action */ 4112 return 1; 4113 } 4114 4115 /** 4116 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4117 * @dev: ATA device 4118 * @cmd: SCSI command opcode to consider 4119 * 4120 * Look up the SCSI command given, and determine whether the 4121 * SCSI command is to be translated or simulated. 4122 * 4123 * RETURNS: 4124 * Pointer to translation function if possible, %NULL if not. 4125 */ 4126 4127 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4128 { 4129 switch (cmd) { 4130 case READ_6: 4131 case READ_10: 4132 case READ_16: 4133 4134 case WRITE_6: 4135 case WRITE_10: 4136 case WRITE_16: 4137 return ata_scsi_rw_xlat; 4138 4139 case WRITE_SAME_16: 4140 return ata_scsi_write_same_xlat; 4141 4142 case SYNCHRONIZE_CACHE: 4143 case SYNCHRONIZE_CACHE_16: 4144 if (ata_try_flush_cache(dev)) 4145 return ata_scsi_flush_xlat; 4146 break; 4147 4148 case VERIFY: 4149 case VERIFY_16: 4150 return ata_scsi_verify_xlat; 4151 4152 case ATA_12: 4153 case ATA_16: 4154 return ata_scsi_pass_thru; 4155 4156 case VARIABLE_LENGTH_CMD: 4157 return ata_scsi_var_len_cdb_xlat; 4158 4159 case MODE_SELECT: 4160 case MODE_SELECT_10: 4161 return ata_scsi_mode_select_xlat; 4162 4163 case ZBC_IN: 4164 return ata_scsi_zbc_in_xlat; 4165 4166 case ZBC_OUT: 4167 return ata_scsi_zbc_out_xlat; 4168 4169 case SECURITY_PROTOCOL_IN: 4170 case SECURITY_PROTOCOL_OUT: 4171 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4172 break; 4173 return ata_scsi_security_inout_xlat; 4174 4175 case START_STOP: 4176 return ata_scsi_start_stop_xlat; 4177 } 4178 4179 return NULL; 4180 } 4181 4182 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4183 { 4184 struct ata_port *ap = dev->link->ap; 4185 u8 scsi_op = scmd->cmnd[0]; 4186 ata_xlat_func_t xlat_func; 4187 4188 /* 4189 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4190 * However, this check is done without holding the ap->lock (a libata 4191 * specific lock), so we can have received an error irq since then, 4192 * therefore we must check if EH is pending, while holding ap->lock. 4193 */ 4194 if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) 4195 return SCSI_MLQUEUE_DEVICE_BUSY; 4196 4197 if (unlikely(!scmd->cmd_len)) 4198 goto bad_cdb_len; 4199 4200 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4201 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4202 goto bad_cdb_len; 4203 4204 xlat_func = ata_get_xlat_func(dev, scsi_op); 4205 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4206 /* relay SCSI command to ATAPI device */ 4207 int len = COMMAND_SIZE(scsi_op); 4208 4209 if (unlikely(len > scmd->cmd_len || 4210 len > dev->cdb_len || 4211 scmd->cmd_len > ATAPI_CDB_LEN)) 4212 goto bad_cdb_len; 4213 4214 xlat_func = atapi_xlat; 4215 } else { 4216 /* ATA_16 passthru, treat as an ATA command */ 4217 if (unlikely(scmd->cmd_len > 16)) 4218 goto bad_cdb_len; 4219 4220 xlat_func = ata_get_xlat_func(dev, scsi_op); 4221 } 4222 4223 if (xlat_func) 4224 return ata_scsi_translate(dev, scmd, xlat_func); 4225 4226 ata_scsi_simulate(dev, scmd); 4227 4228 return 0; 4229 4230 bad_cdb_len: 4231 scmd->result = DID_ERROR << 16; 4232 scsi_done(scmd); 4233 return 0; 4234 } 4235 4236 /** 4237 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4238 * @shost: SCSI host of command to be sent 4239 * @cmd: SCSI command to be sent 4240 * 4241 * In some cases, this function translates SCSI commands into 4242 * ATA taskfiles, and queues the taskfiles to be sent to 4243 * hardware. In other cases, this function simulates a 4244 * SCSI device by evaluating and responding to certain 4245 * SCSI commands. This creates the overall effect of 4246 * ATA and ATAPI devices appearing as SCSI devices. 4247 * 4248 * LOCKING: 4249 * ATA host lock 4250 * 4251 * RETURNS: 4252 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4253 * 0 otherwise. 4254 */ 4255 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4256 { 4257 struct ata_port *ap; 4258 struct ata_device *dev; 4259 struct scsi_device *scsidev = cmd->device; 4260 int rc = 0; 4261 unsigned long irq_flags; 4262 4263 ap = ata_shost_to_port(shost); 4264 4265 spin_lock_irqsave(ap->lock, irq_flags); 4266 4267 dev = ata_scsi_find_dev(ap, scsidev); 4268 if (likely(dev)) 4269 rc = __ata_scsi_queuecmd(cmd, dev); 4270 else { 4271 cmd->result = (DID_BAD_TARGET << 16); 4272 scsi_done(cmd); 4273 } 4274 4275 spin_unlock_irqrestore(ap->lock, irq_flags); 4276 4277 return rc; 4278 } 4279 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4280 4281 /** 4282 * ata_scsi_simulate - simulate SCSI command on ATA device 4283 * @dev: the target device 4284 * @cmd: SCSI command being sent to device. 4285 * 4286 * Interprets and directly executes a select list of SCSI commands 4287 * that can be handled internally. 4288 * 4289 * LOCKING: 4290 * spin_lock_irqsave(host lock) 4291 */ 4292 4293 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4294 { 4295 struct ata_scsi_args args; 4296 const u8 *scsicmd = cmd->cmnd; 4297 u8 tmp8; 4298 4299 args.dev = dev; 4300 args.id = dev->id; 4301 args.cmd = cmd; 4302 4303 switch(scsicmd[0]) { 4304 case INQUIRY: 4305 if (scsicmd[1] & 2) /* is CmdDt set? */ 4306 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4307 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4308 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4309 else switch (scsicmd[2]) { 4310 case 0x00: 4311 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4312 break; 4313 case 0x80: 4314 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4315 break; 4316 case 0x83: 4317 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4318 break; 4319 case 0x89: 4320 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4321 break; 4322 case 0xb0: 4323 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4324 break; 4325 case 0xb1: 4326 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4327 break; 4328 case 0xb2: 4329 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4330 break; 4331 case 0xb6: 4332 if (dev->flags & ATA_DFLAG_ZAC) 4333 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4334 else 4335 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4336 break; 4337 case 0xb9: 4338 if (dev->cpr_log) 4339 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4340 else 4341 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4342 break; 4343 default: 4344 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4345 break; 4346 } 4347 break; 4348 4349 case MODE_SENSE: 4350 case MODE_SENSE_10: 4351 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4352 break; 4353 4354 case READ_CAPACITY: 4355 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4356 break; 4357 4358 case SERVICE_ACTION_IN_16: 4359 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4360 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4361 else 4362 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4363 break; 4364 4365 case REPORT_LUNS: 4366 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4367 break; 4368 4369 case REQUEST_SENSE: 4370 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4371 break; 4372 4373 /* if we reach this, then writeback caching is disabled, 4374 * turning this into a no-op. 4375 */ 4376 case SYNCHRONIZE_CACHE: 4377 case SYNCHRONIZE_CACHE_16: 4378 fallthrough; 4379 4380 /* no-op's, complete with success */ 4381 case REZERO_UNIT: 4382 case SEEK_6: 4383 case SEEK_10: 4384 case TEST_UNIT_READY: 4385 break; 4386 4387 case SEND_DIAGNOSTIC: 4388 tmp8 = scsicmd[1] & ~(1 << 3); 4389 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4390 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4391 break; 4392 4393 case MAINTENANCE_IN: 4394 if ((scsicmd[1] & 0x1f) == MI_REPORT_SUPPORTED_OPERATION_CODES) 4395 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4396 else 4397 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4398 break; 4399 4400 /* all other commands */ 4401 default: 4402 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4403 /* "Invalid command operation code" */ 4404 break; 4405 } 4406 4407 scsi_done(cmd); 4408 } 4409 4410 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4411 { 4412 int i, rc; 4413 4414 for (i = 0; i < host->n_ports; i++) { 4415 struct ata_port *ap = host->ports[i]; 4416 struct Scsi_Host *shost; 4417 4418 rc = -ENOMEM; 4419 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4420 if (!shost) 4421 goto err_alloc; 4422 4423 shost->eh_noresume = 1; 4424 *(struct ata_port **)&shost->hostdata[0] = ap; 4425 ap->scsi_host = shost; 4426 4427 shost->transportt = ata_scsi_transport_template; 4428 shost->unique_id = ap->print_id; 4429 shost->max_id = 16; 4430 shost->max_lun = 1; 4431 shost->max_channel = 1; 4432 shost->max_cmd_len = 32; 4433 4434 /* Schedule policy is determined by ->qc_defer() 4435 * callback and it needs to see every deferred qc. 4436 * Set host_blocked to 1 to prevent SCSI midlayer from 4437 * automatically deferring requests. 4438 */ 4439 shost->max_host_blocked = 1; 4440 4441 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4442 if (rc) 4443 goto err_alloc; 4444 } 4445 4446 return 0; 4447 4448 err_alloc: 4449 while (--i >= 0) { 4450 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4451 4452 /* scsi_host_put() is in ata_devres_release() */ 4453 scsi_remove_host(shost); 4454 } 4455 return rc; 4456 } 4457 4458 #ifdef CONFIG_OF 4459 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4460 { 4461 struct scsi_device *sdev = dev->sdev; 4462 struct device *d = ap->host->dev; 4463 struct device_node *np = d->of_node; 4464 struct device_node *child; 4465 4466 for_each_available_child_of_node(np, child) { 4467 int ret; 4468 u32 val; 4469 4470 ret = of_property_read_u32(child, "reg", &val); 4471 if (ret) 4472 continue; 4473 if (val == dev->devno) { 4474 dev_dbg(d, "found matching device node\n"); 4475 sdev->sdev_gendev.of_node = child; 4476 return; 4477 } 4478 } 4479 } 4480 #else 4481 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4482 { 4483 } 4484 #endif 4485 4486 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4487 { 4488 int tries = 5; 4489 struct ata_device *last_failed_dev = NULL; 4490 struct ata_link *link; 4491 struct ata_device *dev; 4492 4493 repeat: 4494 ata_for_each_link(link, ap, EDGE) { 4495 ata_for_each_dev(dev, link, ENABLED) { 4496 struct scsi_device *sdev; 4497 int channel = 0, id = 0; 4498 4499 if (dev->sdev) 4500 continue; 4501 4502 if (ata_is_host_link(link)) 4503 id = dev->devno; 4504 else 4505 channel = link->pmp; 4506 4507 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4508 NULL); 4509 if (!IS_ERR(sdev)) { 4510 dev->sdev = sdev; 4511 ata_scsi_assign_ofnode(dev, ap); 4512 scsi_device_put(sdev); 4513 } else { 4514 dev->sdev = NULL; 4515 } 4516 } 4517 } 4518 4519 /* If we scanned while EH was in progress or allocation 4520 * failure occurred, scan would have failed silently. Check 4521 * whether all devices are attached. 4522 */ 4523 ata_for_each_link(link, ap, EDGE) { 4524 ata_for_each_dev(dev, link, ENABLED) { 4525 if (!dev->sdev) 4526 goto exit_loop; 4527 } 4528 } 4529 exit_loop: 4530 if (!link) 4531 return; 4532 4533 /* we're missing some SCSI devices */ 4534 if (sync) { 4535 /* If caller requested synchrnous scan && we've made 4536 * any progress, sleep briefly and repeat. 4537 */ 4538 if (dev != last_failed_dev) { 4539 msleep(100); 4540 last_failed_dev = dev; 4541 goto repeat; 4542 } 4543 4544 /* We might be failing to detect boot device, give it 4545 * a few more chances. 4546 */ 4547 if (--tries) { 4548 msleep(100); 4549 goto repeat; 4550 } 4551 4552 ata_port_err(ap, 4553 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4554 } 4555 4556 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4557 round_jiffies_relative(HZ)); 4558 } 4559 4560 /** 4561 * ata_scsi_offline_dev - offline attached SCSI device 4562 * @dev: ATA device to offline attached SCSI device for 4563 * 4564 * This function is called from ata_eh_hotplug() and responsible 4565 * for taking the SCSI device attached to @dev offline. This 4566 * function is called with host lock which protects dev->sdev 4567 * against clearing. 4568 * 4569 * LOCKING: 4570 * spin_lock_irqsave(host lock) 4571 * 4572 * RETURNS: 4573 * 1 if attached SCSI device exists, 0 otherwise. 4574 */ 4575 int ata_scsi_offline_dev(struct ata_device *dev) 4576 { 4577 if (dev->sdev) { 4578 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4579 return 1; 4580 } 4581 return 0; 4582 } 4583 4584 /** 4585 * ata_scsi_remove_dev - remove attached SCSI device 4586 * @dev: ATA device to remove attached SCSI device for 4587 * 4588 * This function is called from ata_eh_scsi_hotplug() and 4589 * responsible for removing the SCSI device attached to @dev. 4590 * 4591 * LOCKING: 4592 * Kernel thread context (may sleep). 4593 */ 4594 static void ata_scsi_remove_dev(struct ata_device *dev) 4595 { 4596 struct ata_port *ap = dev->link->ap; 4597 struct scsi_device *sdev; 4598 unsigned long flags; 4599 4600 /* Alas, we need to grab scan_mutex to ensure SCSI device 4601 * state doesn't change underneath us and thus 4602 * scsi_device_get() always succeeds. The mutex locking can 4603 * be removed if there is __scsi_device_get() interface which 4604 * increments reference counts regardless of device state. 4605 */ 4606 mutex_lock(&ap->scsi_host->scan_mutex); 4607 spin_lock_irqsave(ap->lock, flags); 4608 4609 /* clearing dev->sdev is protected by host lock */ 4610 sdev = dev->sdev; 4611 dev->sdev = NULL; 4612 4613 if (sdev) { 4614 /* If user initiated unplug races with us, sdev can go 4615 * away underneath us after the host lock and 4616 * scan_mutex are released. Hold onto it. 4617 */ 4618 if (scsi_device_get(sdev) == 0) { 4619 /* The following ensures the attached sdev is 4620 * offline on return from ata_scsi_offline_dev() 4621 * regardless it wins or loses the race 4622 * against this function. 4623 */ 4624 scsi_device_set_state(sdev, SDEV_OFFLINE); 4625 } else { 4626 WARN_ON(1); 4627 sdev = NULL; 4628 } 4629 } 4630 4631 spin_unlock_irqrestore(ap->lock, flags); 4632 mutex_unlock(&ap->scsi_host->scan_mutex); 4633 4634 if (sdev) { 4635 ata_dev_info(dev, "detaching (SCSI %s)\n", 4636 dev_name(&sdev->sdev_gendev)); 4637 4638 scsi_remove_device(sdev); 4639 scsi_device_put(sdev); 4640 } 4641 } 4642 4643 static void ata_scsi_handle_link_detach(struct ata_link *link) 4644 { 4645 struct ata_port *ap = link->ap; 4646 struct ata_device *dev; 4647 4648 ata_for_each_dev(dev, link, ALL) { 4649 unsigned long flags; 4650 4651 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4652 continue; 4653 4654 spin_lock_irqsave(ap->lock, flags); 4655 dev->flags &= ~ATA_DFLAG_DETACHED; 4656 spin_unlock_irqrestore(ap->lock, flags); 4657 4658 if (zpodd_dev_enabled(dev)) 4659 zpodd_exit(dev); 4660 4661 ata_scsi_remove_dev(dev); 4662 } 4663 } 4664 4665 /** 4666 * ata_scsi_media_change_notify - send media change event 4667 * @dev: Pointer to the disk device with media change event 4668 * 4669 * Tell the block layer to send a media change notification 4670 * event. 4671 * 4672 * LOCKING: 4673 * spin_lock_irqsave(host lock) 4674 */ 4675 void ata_scsi_media_change_notify(struct ata_device *dev) 4676 { 4677 if (dev->sdev) 4678 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4679 GFP_ATOMIC); 4680 } 4681 4682 /** 4683 * ata_scsi_hotplug - SCSI part of hotplug 4684 * @work: Pointer to ATA port to perform SCSI hotplug on 4685 * 4686 * Perform SCSI part of hotplug. It's executed from a separate 4687 * workqueue after EH completes. This is necessary because SCSI 4688 * hot plugging requires working EH and hot unplugging is 4689 * synchronized with hot plugging with a mutex. 4690 * 4691 * LOCKING: 4692 * Kernel thread context (may sleep). 4693 */ 4694 void ata_scsi_hotplug(struct work_struct *work) 4695 { 4696 struct ata_port *ap = 4697 container_of(work, struct ata_port, hotplug_task.work); 4698 int i; 4699 4700 if (ap->pflags & ATA_PFLAG_UNLOADING) 4701 return; 4702 4703 mutex_lock(&ap->scsi_scan_mutex); 4704 4705 /* Unplug detached devices. We cannot use link iterator here 4706 * because PMP links have to be scanned even if PMP is 4707 * currently not attached. Iterate manually. 4708 */ 4709 ata_scsi_handle_link_detach(&ap->link); 4710 if (ap->pmp_link) 4711 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4712 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4713 4714 /* scan for new ones */ 4715 ata_scsi_scan_host(ap, 0); 4716 4717 mutex_unlock(&ap->scsi_scan_mutex); 4718 } 4719 4720 /** 4721 * ata_scsi_user_scan - indication for user-initiated bus scan 4722 * @shost: SCSI host to scan 4723 * @channel: Channel to scan 4724 * @id: ID to scan 4725 * @lun: LUN to scan 4726 * 4727 * This function is called when user explicitly requests bus 4728 * scan. Set probe pending flag and invoke EH. 4729 * 4730 * LOCKING: 4731 * SCSI layer (we don't care) 4732 * 4733 * RETURNS: 4734 * Zero. 4735 */ 4736 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4737 unsigned int id, u64 lun) 4738 { 4739 struct ata_port *ap = ata_shost_to_port(shost); 4740 unsigned long flags; 4741 int devno, rc = 0; 4742 4743 if (lun != SCAN_WILD_CARD && lun) 4744 return -EINVAL; 4745 4746 if (!sata_pmp_attached(ap)) { 4747 if (channel != SCAN_WILD_CARD && channel) 4748 return -EINVAL; 4749 devno = id; 4750 } else { 4751 if (id != SCAN_WILD_CARD && id) 4752 return -EINVAL; 4753 devno = channel; 4754 } 4755 4756 spin_lock_irqsave(ap->lock, flags); 4757 4758 if (devno == SCAN_WILD_CARD) { 4759 struct ata_link *link; 4760 4761 ata_for_each_link(link, ap, EDGE) { 4762 struct ata_eh_info *ehi = &link->eh_info; 4763 ehi->probe_mask |= ATA_ALL_DEVICES; 4764 ehi->action |= ATA_EH_RESET; 4765 } 4766 } else { 4767 struct ata_device *dev = ata_find_dev(ap, devno); 4768 4769 if (dev) { 4770 struct ata_eh_info *ehi = &dev->link->eh_info; 4771 ehi->probe_mask |= 1 << dev->devno; 4772 ehi->action |= ATA_EH_RESET; 4773 } else 4774 rc = -EINVAL; 4775 } 4776 4777 if (rc == 0) { 4778 ata_port_schedule_eh(ap); 4779 spin_unlock_irqrestore(ap->lock, flags); 4780 ata_port_wait_eh(ap); 4781 } else 4782 spin_unlock_irqrestore(ap->lock, flags); 4783 4784 return rc; 4785 } 4786 4787 /** 4788 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4789 * @work: Pointer to ATA port to perform scsi_rescan_device() 4790 * 4791 * After ATA pass thru (SAT) commands are executed successfully, 4792 * libata need to propagate the changes to SCSI layer. 4793 * 4794 * LOCKING: 4795 * Kernel thread context (may sleep). 4796 */ 4797 void ata_scsi_dev_rescan(struct work_struct *work) 4798 { 4799 struct ata_port *ap = 4800 container_of(work, struct ata_port, scsi_rescan_task.work); 4801 struct ata_link *link; 4802 struct ata_device *dev; 4803 unsigned long flags; 4804 bool do_resume; 4805 int ret = 0; 4806 4807 mutex_lock(&ap->scsi_scan_mutex); 4808 spin_lock_irqsave(ap->lock, flags); 4809 4810 ata_for_each_link(link, ap, EDGE) { 4811 ata_for_each_dev(dev, link, ENABLED) { 4812 struct scsi_device *sdev = dev->sdev; 4813 4814 /* 4815 * If the port was suspended before this was scheduled, 4816 * bail out. 4817 */ 4818 if (ap->pflags & ATA_PFLAG_SUSPENDED) 4819 goto unlock_ap; 4820 4821 if (!sdev) 4822 continue; 4823 if (scsi_device_get(sdev)) 4824 continue; 4825 4826 do_resume = dev->flags & ATA_DFLAG_RESUMING; 4827 4828 spin_unlock_irqrestore(ap->lock, flags); 4829 if (do_resume) { 4830 ret = scsi_resume_device(sdev); 4831 if (ret == -EWOULDBLOCK) 4832 goto unlock_scan; 4833 dev->flags &= ~ATA_DFLAG_RESUMING; 4834 } 4835 ret = scsi_rescan_device(sdev); 4836 scsi_device_put(sdev); 4837 spin_lock_irqsave(ap->lock, flags); 4838 4839 if (ret) 4840 goto unlock_ap; 4841 } 4842 } 4843 4844 unlock_ap: 4845 spin_unlock_irqrestore(ap->lock, flags); 4846 unlock_scan: 4847 mutex_unlock(&ap->scsi_scan_mutex); 4848 4849 /* Reschedule with a delay if scsi_rescan_device() returned an error */ 4850 if (ret) 4851 schedule_delayed_work(&ap->scsi_rescan_task, 4852 msecs_to_jiffies(5)); 4853 } 4854