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 } else { 1729 /* Keep the SCSI ML and status byte, clear host byte. */ 1730 cmd->result &= 0x0000ffff; 1731 } 1732 1733 ata_qc_done(qc); 1734 } 1735 1736 /** 1737 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1738 * @dev: ATA device to which the command is addressed 1739 * @cmd: SCSI command to execute 1740 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1741 * 1742 * Our ->queuecommand() function has decided that the SCSI 1743 * command issued can be directly translated into an ATA 1744 * command, rather than handled internally. 1745 * 1746 * This function sets up an ata_queued_cmd structure for the 1747 * SCSI command, and sends that ata_queued_cmd to the hardware. 1748 * 1749 * The xlat_func argument (actor) returns 0 if ready to execute 1750 * ATA command, else 1 to finish translation. If 1 is returned 1751 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1752 * to be set reflecting an error condition or clean (early) 1753 * termination. 1754 * 1755 * LOCKING: 1756 * spin_lock_irqsave(host lock) 1757 * 1758 * RETURNS: 1759 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1760 * needs to be deferred. 1761 */ 1762 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1763 ata_xlat_func_t xlat_func) 1764 { 1765 struct ata_port *ap = dev->link->ap; 1766 struct ata_queued_cmd *qc; 1767 int rc; 1768 1769 qc = ata_scsi_qc_new(dev, cmd); 1770 if (!qc) 1771 goto err_mem; 1772 1773 /* data is present; dma-map it */ 1774 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1775 cmd->sc_data_direction == DMA_TO_DEVICE) { 1776 if (unlikely(scsi_bufflen(cmd) < 1)) { 1777 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1778 goto err_did; 1779 } 1780 1781 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1782 1783 qc->dma_dir = cmd->sc_data_direction; 1784 } 1785 1786 qc->complete_fn = ata_scsi_qc_complete; 1787 1788 if (xlat_func(qc)) 1789 goto early_finish; 1790 1791 if (ap->ops->qc_defer) { 1792 if ((rc = ap->ops->qc_defer(qc))) 1793 goto defer; 1794 } 1795 1796 /* select device, send command to hardware */ 1797 ata_qc_issue(qc); 1798 1799 return 0; 1800 1801 early_finish: 1802 ata_qc_free(qc); 1803 scsi_done(cmd); 1804 return 0; 1805 1806 err_did: 1807 ata_qc_free(qc); 1808 cmd->result = (DID_ERROR << 16); 1809 scsi_done(cmd); 1810 err_mem: 1811 return 0; 1812 1813 defer: 1814 ata_qc_free(qc); 1815 if (rc == ATA_DEFER_LINK) 1816 return SCSI_MLQUEUE_DEVICE_BUSY; 1817 else 1818 return SCSI_MLQUEUE_HOST_BUSY; 1819 } 1820 1821 struct ata_scsi_args { 1822 struct ata_device *dev; 1823 u16 *id; 1824 struct scsi_cmnd *cmd; 1825 }; 1826 1827 /** 1828 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1829 * @args: device IDENTIFY data / SCSI command of interest. 1830 * @actor: Callback hook for desired SCSI command simulator 1831 * 1832 * Takes care of the hard work of simulating a SCSI command... 1833 * Mapping the response buffer, calling the command's handler, 1834 * and handling the handler's return value. This return value 1835 * indicates whether the handler wishes the SCSI command to be 1836 * completed successfully (0), or not (in which case cmd->result 1837 * and sense buffer are assumed to be set). 1838 * 1839 * LOCKING: 1840 * spin_lock_irqsave(host lock) 1841 */ 1842 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1843 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1844 { 1845 unsigned int rc; 1846 struct scsi_cmnd *cmd = args->cmd; 1847 unsigned long flags; 1848 1849 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 1850 1851 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1852 rc = actor(args, ata_scsi_rbuf); 1853 if (rc == 0) 1854 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1855 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1856 1857 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 1858 1859 if (rc == 0) 1860 cmd->result = SAM_STAT_GOOD; 1861 } 1862 1863 /** 1864 * ata_scsiop_inq_std - Simulate INQUIRY command 1865 * @args: device IDENTIFY data / SCSI command of interest. 1866 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1867 * 1868 * Returns standard device identification data associated 1869 * with non-VPD INQUIRY command output. 1870 * 1871 * LOCKING: 1872 * spin_lock_irqsave(host lock) 1873 */ 1874 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1875 { 1876 static const u8 versions[] = { 1877 0x00, 1878 0x60, /* SAM-3 (no version claimed) */ 1879 1880 0x03, 1881 0x20, /* SBC-2 (no version claimed) */ 1882 1883 0x03, 1884 0x00 /* SPC-3 (no version claimed) */ 1885 }; 1886 static const u8 versions_zbc[] = { 1887 0x00, 1888 0xA0, /* SAM-5 (no version claimed) */ 1889 1890 0x06, 1891 0x00, /* SBC-4 (no version claimed) */ 1892 1893 0x05, 1894 0xC0, /* SPC-5 (no version claimed) */ 1895 1896 0x60, 1897 0x24, /* ZBC r05 */ 1898 }; 1899 1900 u8 hdr[] = { 1901 TYPE_DISK, 1902 0, 1903 0x5, /* claim SPC-3 version compatibility */ 1904 2, 1905 95 - 4, 1906 0, 1907 0, 1908 2 1909 }; 1910 1911 /* set scsi removable (RMB) bit per ata bit, or if the 1912 * AHCI port says it's external (Hotplug-capable, eSATA). 1913 */ 1914 if (ata_id_removable(args->id) || 1915 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1916 hdr[1] |= (1 << 7); 1917 1918 if (args->dev->class == ATA_DEV_ZAC) { 1919 hdr[0] = TYPE_ZBC; 1920 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1921 } 1922 1923 if (args->dev->flags & ATA_DFLAG_CDL) 1924 hdr[2] = 0xd; /* claim SPC-6 version compatibility */ 1925 1926 memcpy(rbuf, hdr, sizeof(hdr)); 1927 memcpy(&rbuf[8], "ATA ", 8); 1928 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1929 1930 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1931 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1932 if (strncmp(&rbuf[32], " ", 4) == 0) 1933 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1934 1935 if (rbuf[32] == 0 || rbuf[32] == ' ') 1936 memcpy(&rbuf[32], "n/a ", 4); 1937 1938 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1939 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1940 else 1941 memcpy(rbuf + 58, versions, sizeof(versions)); 1942 1943 return 0; 1944 } 1945 1946 /** 1947 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1948 * @args: device IDENTIFY data / SCSI command of interest. 1949 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1950 * 1951 * Returns list of inquiry VPD pages available. 1952 * 1953 * LOCKING: 1954 * spin_lock_irqsave(host lock) 1955 */ 1956 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1957 { 1958 int i, num_pages = 0; 1959 static const u8 pages[] = { 1960 0x00, /* page 0x00, this page */ 1961 0x80, /* page 0x80, unit serial no page */ 1962 0x83, /* page 0x83, device ident page */ 1963 0x89, /* page 0x89, ata info page */ 1964 0xb0, /* page 0xb0, block limits page */ 1965 0xb1, /* page 0xb1, block device characteristics page */ 1966 0xb2, /* page 0xb2, thin provisioning page */ 1967 0xb6, /* page 0xb6, zoned block device characteristics */ 1968 0xb9, /* page 0xb9, concurrent positioning ranges */ 1969 }; 1970 1971 for (i = 0; i < sizeof(pages); i++) { 1972 if (pages[i] == 0xb6 && 1973 !(args->dev->flags & ATA_DFLAG_ZAC)) 1974 continue; 1975 rbuf[num_pages + 4] = pages[i]; 1976 num_pages++; 1977 } 1978 rbuf[3] = num_pages; /* number of supported VPD pages */ 1979 return 0; 1980 } 1981 1982 /** 1983 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1984 * @args: device IDENTIFY data / SCSI command of interest. 1985 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1986 * 1987 * Returns ATA device serial number. 1988 * 1989 * LOCKING: 1990 * spin_lock_irqsave(host lock) 1991 */ 1992 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1993 { 1994 static const u8 hdr[] = { 1995 0, 1996 0x80, /* this page code */ 1997 0, 1998 ATA_ID_SERNO_LEN, /* page len */ 1999 }; 2000 2001 memcpy(rbuf, hdr, sizeof(hdr)); 2002 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2003 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2004 return 0; 2005 } 2006 2007 /** 2008 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2009 * @args: device IDENTIFY data / SCSI command of interest. 2010 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2011 * 2012 * Yields two logical unit device identification designators: 2013 * - vendor specific ASCII containing the ATA serial number 2014 * - SAT defined "t10 vendor id based" containing ASCII vendor 2015 * name ("ATA "), model and serial numbers. 2016 * 2017 * LOCKING: 2018 * spin_lock_irqsave(host lock) 2019 */ 2020 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2021 { 2022 const int sat_model_serial_desc_len = 68; 2023 int num; 2024 2025 rbuf[1] = 0x83; /* this page code */ 2026 num = 4; 2027 2028 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2029 rbuf[num + 0] = 2; 2030 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2031 num += 4; 2032 ata_id_string(args->id, (unsigned char *) rbuf + num, 2033 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2034 num += ATA_ID_SERNO_LEN; 2035 2036 /* SAT defined lu model and serial numbers descriptor */ 2037 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2038 rbuf[num + 0] = 2; 2039 rbuf[num + 1] = 1; 2040 rbuf[num + 3] = sat_model_serial_desc_len; 2041 num += 4; 2042 memcpy(rbuf + num, "ATA ", 8); 2043 num += 8; 2044 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2045 ATA_ID_PROD_LEN); 2046 num += ATA_ID_PROD_LEN; 2047 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2048 ATA_ID_SERNO_LEN); 2049 num += ATA_ID_SERNO_LEN; 2050 2051 if (ata_id_has_wwn(args->id)) { 2052 /* SAT defined lu world wide name */ 2053 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2054 rbuf[num + 0] = 1; 2055 rbuf[num + 1] = 3; 2056 rbuf[num + 3] = ATA_ID_WWN_LEN; 2057 num += 4; 2058 ata_id_string(args->id, (unsigned char *) rbuf + num, 2059 ATA_ID_WWN, ATA_ID_WWN_LEN); 2060 num += ATA_ID_WWN_LEN; 2061 } 2062 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2063 return 0; 2064 } 2065 2066 /** 2067 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2068 * @args: device IDENTIFY data / SCSI command of interest. 2069 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2070 * 2071 * Yields SAT-specified ATA VPD page. 2072 * 2073 * LOCKING: 2074 * spin_lock_irqsave(host lock) 2075 */ 2076 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2077 { 2078 rbuf[1] = 0x89; /* our page code */ 2079 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2080 rbuf[3] = (0x238 & 0xff); 2081 2082 memcpy(&rbuf[8], "linux ", 8); 2083 memcpy(&rbuf[16], "libata ", 16); 2084 memcpy(&rbuf[32], DRV_VERSION, 4); 2085 2086 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2087 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2088 /* TODO: PMP? */ 2089 2090 /* we don't store the ATA device signature, so we fake it */ 2091 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2092 rbuf[40] = 0x1; 2093 rbuf[48] = 0x1; 2094 2095 rbuf[56] = ATA_CMD_ID_ATA; 2096 2097 memcpy(&rbuf[60], &args->id[0], 512); 2098 return 0; 2099 } 2100 2101 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2102 { 2103 struct ata_device *dev = args->dev; 2104 u16 min_io_sectors; 2105 2106 rbuf[1] = 0xb0; 2107 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2108 2109 /* 2110 * Optimal transfer length granularity. 2111 * 2112 * This is always one physical block, but for disks with a smaller 2113 * logical than physical sector size we need to figure out what the 2114 * latter is. 2115 */ 2116 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2117 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2118 2119 /* 2120 * Optimal unmap granularity. 2121 * 2122 * The ATA spec doesn't even know about a granularity or alignment 2123 * for the TRIM command. We can leave away most of the unmap related 2124 * VPD page entries, but we have specifify a granularity to signal 2125 * that we support some form of unmap - in thise case via WRITE SAME 2126 * with the unmap bit set. 2127 */ 2128 if (ata_id_has_trim(args->id)) { 2129 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2130 2131 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2132 max_blocks = 128 << (20 - SECTOR_SHIFT); 2133 2134 put_unaligned_be64(max_blocks, &rbuf[36]); 2135 put_unaligned_be32(1, &rbuf[28]); 2136 } 2137 2138 return 0; 2139 } 2140 2141 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2142 { 2143 int form_factor = ata_id_form_factor(args->id); 2144 int media_rotation_rate = ata_id_rotation_rate(args->id); 2145 u8 zoned = ata_id_zoned_cap(args->id); 2146 2147 rbuf[1] = 0xb1; 2148 rbuf[3] = 0x3c; 2149 rbuf[4] = media_rotation_rate >> 8; 2150 rbuf[5] = media_rotation_rate; 2151 rbuf[7] = form_factor; 2152 if (zoned) 2153 rbuf[8] = (zoned << 4); 2154 2155 return 0; 2156 } 2157 2158 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2159 { 2160 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2161 rbuf[1] = 0xb2; 2162 rbuf[3] = 0x4; 2163 rbuf[5] = 1 << 6; /* TPWS */ 2164 2165 return 0; 2166 } 2167 2168 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2169 { 2170 /* 2171 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2172 */ 2173 rbuf[1] = 0xb6; 2174 rbuf[3] = 0x3C; 2175 2176 /* 2177 * URSWRZ bit is only meaningful for host-managed ZAC drives 2178 */ 2179 if (args->dev->zac_zoned_cap & 1) 2180 rbuf[4] |= 1; 2181 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2182 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2183 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2184 2185 return 0; 2186 } 2187 2188 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf) 2189 { 2190 struct ata_cpr_log *cpr_log = args->dev->cpr_log; 2191 u8 *desc = &rbuf[64]; 2192 int i; 2193 2194 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ 2195 rbuf[1] = 0xb9; 2196 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); 2197 2198 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { 2199 desc[0] = cpr_log->cpr[i].num; 2200 desc[1] = cpr_log->cpr[i].num_storage_elements; 2201 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); 2202 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); 2203 } 2204 2205 return 0; 2206 } 2207 2208 /** 2209 * modecpy - Prepare response for MODE SENSE 2210 * @dest: output buffer 2211 * @src: data being copied 2212 * @n: length of mode page 2213 * @changeable: whether changeable parameters are requested 2214 * 2215 * Generate a generic MODE SENSE page for either current or changeable 2216 * parameters. 2217 * 2218 * LOCKING: 2219 * None. 2220 */ 2221 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2222 { 2223 if (changeable) { 2224 memcpy(dest, src, 2); 2225 memset(dest + 2, 0, n - 2); 2226 } else { 2227 memcpy(dest, src, n); 2228 } 2229 } 2230 2231 /** 2232 * ata_msense_caching - Simulate MODE SENSE caching info page 2233 * @id: device IDENTIFY data 2234 * @buf: output buffer 2235 * @changeable: whether changeable parameters are requested 2236 * 2237 * Generate a caching info page, which conditionally indicates 2238 * write caching to the SCSI layer, depending on device 2239 * capabilities. 2240 * 2241 * LOCKING: 2242 * None. 2243 */ 2244 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2245 { 2246 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2247 if (changeable) { 2248 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2249 } else { 2250 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2251 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2252 } 2253 return sizeof(def_cache_mpage); 2254 } 2255 2256 /* 2257 * Simulate MODE SENSE control mode page, sub-page 0. 2258 */ 2259 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, 2260 bool changeable) 2261 { 2262 modecpy(buf, def_control_mpage, 2263 sizeof(def_control_mpage), changeable); 2264 if (changeable) { 2265 /* ata_mselect_control() */ 2266 buf[2] |= (1 << 2); 2267 } else { 2268 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2269 2270 /* descriptor format sense data */ 2271 buf[2] |= (d_sense << 2); 2272 } 2273 2274 return sizeof(def_control_mpage); 2275 } 2276 2277 /* 2278 * Translate an ATA duration limit in microseconds to a SCSI duration limit 2279 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes 2280 * only, take care of overflows. 2281 */ 2282 static inline u16 ata_xlat_cdl_limit(u8 *buf) 2283 { 2284 u32 limit = get_unaligned_le32(buf); 2285 2286 return min_t(u32, limit / 10000, 65535); 2287 } 2288 2289 /* 2290 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h 2291 * (command duration limits T2A and T2B mode pages). 2292 */ 2293 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, 2294 u8 spg) 2295 { 2296 u8 *b, *cdl = dev->cdl, *desc; 2297 u32 policy; 2298 int i; 2299 2300 /* 2301 * Fill the subpage. The first four bytes of the T2A/T2B mode pages 2302 * are a header. The PAGE LENGTH field is the size of the page 2303 * excluding the header. 2304 */ 2305 buf[0] = CONTROL_MPAGE; 2306 buf[1] = spg; 2307 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); 2308 if (spg == CDL_T2A_SUB_MPAGE) { 2309 /* 2310 * Read descriptors map to the T2A page: 2311 * set perf_vs_duration_guidleine. 2312 */ 2313 buf[7] = (cdl[0] & 0x03) << 4; 2314 desc = cdl + 64; 2315 } else { 2316 /* Write descriptors map to the T2B page */ 2317 desc = cdl + 288; 2318 } 2319 2320 /* Fill the T2 page descriptors */ 2321 b = &buf[8]; 2322 policy = get_unaligned_le32(&cdl[0]); 2323 for (i = 0; i < 7; i++, b += 32, desc += 32) { 2324 /* t2cdlunits: fixed to 10ms */ 2325 b[0] = 0x0a; 2326 2327 /* Max inactive time and its policy */ 2328 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); 2329 b[6] = ((policy >> 8) & 0x0f) << 4; 2330 2331 /* Max active time and its policy */ 2332 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); 2333 b[6] |= (policy >> 4) & 0x0f; 2334 2335 /* Command duration guideline and its policy */ 2336 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); 2337 b[14] = policy & 0x0f; 2338 } 2339 2340 return CDL_T2_SUB_MPAGE_LEN; 2341 } 2342 2343 /* 2344 * Simulate MODE SENSE control mode page, sub-page f2h 2345 * (ATA feature control mode page). 2346 */ 2347 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, 2348 u8 *buf) 2349 { 2350 /* PS=0, SPF=1 */ 2351 buf[0] = CONTROL_MPAGE | (1 << 6); 2352 buf[1] = ATA_FEATURE_SUB_MPAGE; 2353 2354 /* 2355 * The first four bytes of ATA Feature Control mode page are a header. 2356 * The PAGE LENGTH field is the size of the page excluding the header. 2357 */ 2358 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); 2359 2360 if (dev->flags & ATA_DFLAG_CDL) 2361 buf[4] = 0x02; /* Support T2A and T2B pages */ 2362 else 2363 buf[4] = 0; 2364 2365 return ATA_FEATURE_SUB_MPAGE_LEN; 2366 } 2367 2368 /** 2369 * ata_msense_control - Simulate MODE SENSE control mode page 2370 * @dev: ATA device of interest 2371 * @buf: output buffer 2372 * @spg: sub-page code 2373 * @changeable: whether changeable parameters are requested 2374 * 2375 * Generate a generic MODE SENSE control mode page. 2376 * 2377 * LOCKING: 2378 * None. 2379 */ 2380 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2381 u8 spg, bool changeable) 2382 { 2383 unsigned int n; 2384 2385 switch (spg) { 2386 case 0: 2387 return ata_msense_control_spg0(dev, buf, changeable); 2388 case CDL_T2A_SUB_MPAGE: 2389 case CDL_T2B_SUB_MPAGE: 2390 return ata_msense_control_spgt2(dev, buf, spg); 2391 case ATA_FEATURE_SUB_MPAGE: 2392 return ata_msense_control_ata_feature(dev, buf); 2393 case ALL_SUB_MPAGES: 2394 n = ata_msense_control_spg0(dev, buf, changeable); 2395 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2396 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); 2397 n += ata_msense_control_ata_feature(dev, buf + n); 2398 return n; 2399 default: 2400 return 0; 2401 } 2402 } 2403 2404 /** 2405 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2406 * @buf: output buffer 2407 * @changeable: whether changeable parameters are requested 2408 * 2409 * Generate a generic MODE SENSE r/w error recovery page. 2410 * 2411 * LOCKING: 2412 * None. 2413 */ 2414 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2415 { 2416 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2417 changeable); 2418 return sizeof(def_rw_recovery_mpage); 2419 } 2420 2421 /** 2422 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2423 * @args: device IDENTIFY data / SCSI command of interest. 2424 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2425 * 2426 * Simulate MODE SENSE commands. Assume this is invoked for direct 2427 * access devices (e.g. disks) only. There should be no block 2428 * descriptor for other device types. 2429 * 2430 * LOCKING: 2431 * spin_lock_irqsave(host lock) 2432 */ 2433 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2434 { 2435 struct ata_device *dev = args->dev; 2436 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2437 static const u8 sat_blk_desc[] = { 2438 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2439 0, 2440 0, 0x2, 0x0 /* block length: 512 bytes */ 2441 }; 2442 u8 pg, spg; 2443 unsigned int ebd, page_control, six_byte; 2444 u8 dpofua = 0, bp = 0xff; 2445 u16 fp; 2446 2447 six_byte = (scsicmd[0] == MODE_SENSE); 2448 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2449 /* 2450 * LLBA bit in msense(10) ignored (compliant) 2451 */ 2452 2453 page_control = scsicmd[2] >> 6; 2454 switch (page_control) { 2455 case 0: /* current */ 2456 case 1: /* changeable */ 2457 case 2: /* defaults */ 2458 break; /* supported */ 2459 case 3: /* saved */ 2460 goto saving_not_supp; 2461 default: 2462 fp = 2; 2463 bp = 6; 2464 goto invalid_fld; 2465 } 2466 2467 if (six_byte) 2468 p += 4 + (ebd ? 8 : 0); 2469 else 2470 p += 8 + (ebd ? 8 : 0); 2471 2472 pg = scsicmd[2] & 0x3f; 2473 spg = scsicmd[3]; 2474 2475 /* 2476 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of 2477 * the control page. 2478 */ 2479 if (spg) { 2480 switch (spg) { 2481 case ALL_SUB_MPAGES: 2482 break; 2483 case CDL_T2A_SUB_MPAGE: 2484 case CDL_T2B_SUB_MPAGE: 2485 case ATA_FEATURE_SUB_MPAGE: 2486 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) 2487 break; 2488 fallthrough; 2489 default: 2490 fp = 3; 2491 goto invalid_fld; 2492 } 2493 } 2494 2495 switch(pg) { 2496 case RW_RECOVERY_MPAGE: 2497 p += ata_msense_rw_recovery(p, page_control == 1); 2498 break; 2499 2500 case CACHE_MPAGE: 2501 p += ata_msense_caching(args->id, p, page_control == 1); 2502 break; 2503 2504 case CONTROL_MPAGE: 2505 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2506 break; 2507 2508 case ALL_MPAGES: 2509 p += ata_msense_rw_recovery(p, page_control == 1); 2510 p += ata_msense_caching(args->id, p, page_control == 1); 2511 p += ata_msense_control(args->dev, p, spg, page_control == 1); 2512 break; 2513 2514 default: /* invalid page code */ 2515 fp = 2; 2516 goto invalid_fld; 2517 } 2518 2519 if (dev->flags & ATA_DFLAG_FUA) 2520 dpofua = 1 << 4; 2521 2522 if (six_byte) { 2523 rbuf[0] = p - rbuf - 1; 2524 rbuf[2] |= dpofua; 2525 if (ebd) { 2526 rbuf[3] = sizeof(sat_blk_desc); 2527 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2528 } 2529 } else { 2530 put_unaligned_be16(p - rbuf - 2, &rbuf[0]); 2531 rbuf[3] |= dpofua; 2532 if (ebd) { 2533 rbuf[7] = sizeof(sat_blk_desc); 2534 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2535 } 2536 } 2537 return 0; 2538 2539 invalid_fld: 2540 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2541 return 1; 2542 2543 saving_not_supp: 2544 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2545 /* "Saving parameters not supported" */ 2546 return 1; 2547 } 2548 2549 /** 2550 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2551 * @args: device IDENTIFY data / SCSI command of interest. 2552 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2553 * 2554 * Simulate READ CAPACITY commands. 2555 * 2556 * LOCKING: 2557 * None. 2558 */ 2559 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2560 { 2561 struct ata_device *dev = args->dev; 2562 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2563 u32 sector_size; /* physical sector size in bytes */ 2564 u8 log2_per_phys; 2565 u16 lowest_aligned; 2566 2567 sector_size = ata_id_logical_sector_size(dev->id); 2568 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2569 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2570 2571 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2572 if (last_lba >= 0xffffffffULL) 2573 last_lba = 0xffffffff; 2574 2575 /* sector count, 32-bit */ 2576 rbuf[0] = last_lba >> (8 * 3); 2577 rbuf[1] = last_lba >> (8 * 2); 2578 rbuf[2] = last_lba >> (8 * 1); 2579 rbuf[3] = last_lba; 2580 2581 /* sector size */ 2582 rbuf[4] = sector_size >> (8 * 3); 2583 rbuf[5] = sector_size >> (8 * 2); 2584 rbuf[6] = sector_size >> (8 * 1); 2585 rbuf[7] = sector_size; 2586 } else { 2587 /* sector count, 64-bit */ 2588 rbuf[0] = last_lba >> (8 * 7); 2589 rbuf[1] = last_lba >> (8 * 6); 2590 rbuf[2] = last_lba >> (8 * 5); 2591 rbuf[3] = last_lba >> (8 * 4); 2592 rbuf[4] = last_lba >> (8 * 3); 2593 rbuf[5] = last_lba >> (8 * 2); 2594 rbuf[6] = last_lba >> (8 * 1); 2595 rbuf[7] = last_lba; 2596 2597 /* sector size */ 2598 rbuf[ 8] = sector_size >> (8 * 3); 2599 rbuf[ 9] = sector_size >> (8 * 2); 2600 rbuf[10] = sector_size >> (8 * 1); 2601 rbuf[11] = sector_size; 2602 2603 rbuf[12] = 0; 2604 rbuf[13] = log2_per_phys; 2605 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2606 rbuf[15] = lowest_aligned; 2607 2608 if (ata_id_has_trim(args->id) && 2609 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2610 rbuf[14] |= 0x80; /* LBPME */ 2611 2612 if (ata_id_has_zero_after_trim(args->id) && 2613 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2614 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2615 rbuf[14] |= 0x40; /* LBPRZ */ 2616 } 2617 } 2618 if (ata_id_zoned_cap(args->id) || 2619 args->dev->class == ATA_DEV_ZAC) 2620 rbuf[12] = (1 << 4); /* RC_BASIS */ 2621 } 2622 return 0; 2623 } 2624 2625 /** 2626 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2627 * @args: device IDENTIFY data / SCSI command of interest. 2628 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2629 * 2630 * Simulate REPORT LUNS command. 2631 * 2632 * LOCKING: 2633 * spin_lock_irqsave(host lock) 2634 */ 2635 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2636 { 2637 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2638 2639 return 0; 2640 } 2641 2642 /* 2643 * ATAPI devices typically report zero for their SCSI version, and sometimes 2644 * deviate from the spec WRT response data format. If SCSI version is 2645 * reported as zero like normal, then we make the following fixups: 2646 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2647 * modern device. 2648 * 2) Ensure response data format / ATAPI information are always correct. 2649 */ 2650 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2651 { 2652 u8 buf[4]; 2653 2654 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2655 if (buf[2] == 0) { 2656 buf[2] = 0x5; 2657 buf[3] = 0x32; 2658 } 2659 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2660 } 2661 2662 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2663 { 2664 struct scsi_cmnd *cmd = qc->scsicmd; 2665 unsigned int err_mask = qc->err_mask; 2666 2667 /* handle completion from EH */ 2668 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2669 2670 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) 2671 ata_gen_passthru_sense(qc); 2672 2673 /* SCSI EH automatically locks door if sdev->locked is 2674 * set. Sometimes door lock request continues to 2675 * fail, for example, when no media is present. This 2676 * creates a loop - SCSI EH issues door lock which 2677 * fails and gets invoked again to acquire sense data 2678 * for the failed command. 2679 * 2680 * If door lock fails, always clear sdev->locked to 2681 * avoid this infinite loop. 2682 * 2683 * This may happen before SCSI scan is complete. Make 2684 * sure qc->dev->sdev isn't NULL before dereferencing. 2685 */ 2686 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2687 qc->dev->sdev->locked = 0; 2688 2689 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2690 ata_qc_done(qc); 2691 return; 2692 } 2693 2694 /* successful completion path */ 2695 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2696 atapi_fixup_inquiry(cmd); 2697 cmd->result = SAM_STAT_GOOD; 2698 2699 ata_qc_done(qc); 2700 } 2701 /** 2702 * atapi_xlat - Initialize PACKET taskfile 2703 * @qc: command structure to be initialized 2704 * 2705 * LOCKING: 2706 * spin_lock_irqsave(host lock) 2707 * 2708 * RETURNS: 2709 * Zero on success, non-zero on failure. 2710 */ 2711 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2712 { 2713 struct scsi_cmnd *scmd = qc->scsicmd; 2714 struct ata_device *dev = qc->dev; 2715 int nodata = (scmd->sc_data_direction == DMA_NONE); 2716 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2717 unsigned int nbytes; 2718 2719 memset(qc->cdb, 0, dev->cdb_len); 2720 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2721 2722 qc->complete_fn = atapi_qc_complete; 2723 2724 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2725 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2726 qc->tf.flags |= ATA_TFLAG_WRITE; 2727 } 2728 2729 qc->tf.command = ATA_CMD_PACKET; 2730 ata_qc_set_pc_nbytes(qc); 2731 2732 /* check whether ATAPI DMA is safe */ 2733 if (!nodata && !using_pio && atapi_check_dma(qc)) 2734 using_pio = 1; 2735 2736 /* Some controller variants snoop this value for Packet 2737 * transfers to do state machine and FIFO management. Thus we 2738 * want to set it properly, and for DMA where it is 2739 * effectively meaningless. 2740 */ 2741 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2742 2743 /* Most ATAPI devices which honor transfer chunk size don't 2744 * behave according to the spec when odd chunk size which 2745 * matches the transfer length is specified. If the number of 2746 * bytes to transfer is 2n+1. According to the spec, what 2747 * should happen is to indicate that 2n+1 is going to be 2748 * transferred and transfer 2n+2 bytes where the last byte is 2749 * padding. 2750 * 2751 * In practice, this doesn't happen. ATAPI devices first 2752 * indicate and transfer 2n bytes and then indicate and 2753 * transfer 2 bytes where the last byte is padding. 2754 * 2755 * This inconsistency confuses several controllers which 2756 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2757 * These controllers use actual number of transferred bytes to 2758 * update DMA pointer and transfer of 4n+2 bytes make those 2759 * controller push DMA pointer by 4n+4 bytes because SATA data 2760 * FISes are aligned to 4 bytes. This causes data corruption 2761 * and buffer overrun. 2762 * 2763 * Always setting nbytes to even number solves this problem 2764 * because then ATAPI devices don't have to split data at 2n 2765 * boundaries. 2766 */ 2767 if (nbytes & 0x1) 2768 nbytes++; 2769 2770 qc->tf.lbam = (nbytes & 0xFF); 2771 qc->tf.lbah = (nbytes >> 8); 2772 2773 if (nodata) 2774 qc->tf.protocol = ATAPI_PROT_NODATA; 2775 else if (using_pio) 2776 qc->tf.protocol = ATAPI_PROT_PIO; 2777 else { 2778 /* DMA data xfer */ 2779 qc->tf.protocol = ATAPI_PROT_DMA; 2780 qc->tf.feature |= ATAPI_PKT_DMA; 2781 2782 if ((dev->flags & ATA_DFLAG_DMADIR) && 2783 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2784 /* some SATA bridges need us to indicate data xfer direction */ 2785 qc->tf.feature |= ATAPI_DMADIR; 2786 } 2787 2788 2789 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2790 as ATAPI tape drives don't get this right otherwise */ 2791 return 0; 2792 } 2793 2794 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) 2795 { 2796 /* 2797 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), 2798 * or 2 (IDE master + slave case). However, the former case includes 2799 * libsas hosted devices which are numbered per scsi host, leading 2800 * to devno potentially being larger than 0 but with each struct 2801 * ata_device having its own struct ata_port and struct ata_link. 2802 * To accommodate these, ignore devno and always use device number 0. 2803 */ 2804 if (likely(!sata_pmp_attached(ap))) { 2805 int link_max_devices = ata_link_max_devices(&ap->link); 2806 2807 if (link_max_devices == 1) 2808 return &ap->link.device[0]; 2809 2810 if (devno < link_max_devices) 2811 return &ap->link.device[devno]; 2812 2813 return NULL; 2814 } 2815 2816 /* 2817 * For PMP-attached devices, the device number corresponds to C 2818 * (channel) of SCSI [H:C:I:L], indicating the port pmp link 2819 * for the device. 2820 */ 2821 if (devno < ap->nr_pmp_links) 2822 return &ap->pmp_link[devno].device[0]; 2823 2824 return NULL; 2825 } 2826 2827 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2828 const struct scsi_device *scsidev) 2829 { 2830 int devno; 2831 2832 /* skip commands not addressed to targets we simulate */ 2833 if (!sata_pmp_attached(ap)) { 2834 if (unlikely(scsidev->channel || scsidev->lun)) 2835 return NULL; 2836 devno = scsidev->id; 2837 } else { 2838 if (unlikely(scsidev->id || scsidev->lun)) 2839 return NULL; 2840 devno = scsidev->channel; 2841 } 2842 2843 return ata_find_dev(ap, devno); 2844 } 2845 2846 /** 2847 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2848 * @ap: ATA port to which the device is attached 2849 * @scsidev: SCSI device from which we derive the ATA device 2850 * 2851 * Given various information provided in struct scsi_cmnd, 2852 * map that onto an ATA bus, and using that mapping 2853 * determine which ata_device is associated with the 2854 * SCSI command to be sent. 2855 * 2856 * LOCKING: 2857 * spin_lock_irqsave(host lock) 2858 * 2859 * RETURNS: 2860 * Associated ATA device, or %NULL if not found. 2861 */ 2862 struct ata_device * 2863 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2864 { 2865 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2866 2867 if (unlikely(!dev || !ata_dev_enabled(dev))) 2868 return NULL; 2869 2870 return dev; 2871 } 2872 2873 /* 2874 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2875 * @byte1: Byte 1 from pass-thru CDB. 2876 * 2877 * RETURNS: 2878 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2879 */ 2880 static u8 2881 ata_scsi_map_proto(u8 byte1) 2882 { 2883 switch((byte1 & 0x1e) >> 1) { 2884 case 3: /* Non-data */ 2885 return ATA_PROT_NODATA; 2886 2887 case 6: /* DMA */ 2888 case 10: /* UDMA Data-in */ 2889 case 11: /* UDMA Data-Out */ 2890 return ATA_PROT_DMA; 2891 2892 case 4: /* PIO Data-in */ 2893 case 5: /* PIO Data-out */ 2894 return ATA_PROT_PIO; 2895 2896 case 12: /* FPDMA */ 2897 return ATA_PROT_NCQ; 2898 2899 case 0: /* Hard Reset */ 2900 case 1: /* SRST */ 2901 case 8: /* Device Diagnostic */ 2902 case 9: /* Device Reset */ 2903 case 7: /* DMA Queued */ 2904 case 15: /* Return Response Info */ 2905 default: /* Reserved */ 2906 break; 2907 } 2908 2909 return ATA_PROT_UNKNOWN; 2910 } 2911 2912 /** 2913 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2914 * @qc: command structure to be initialized 2915 * 2916 * Handles either 12, 16, or 32-byte versions of the CDB. 2917 * 2918 * RETURNS: 2919 * Zero on success, non-zero on failure. 2920 */ 2921 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2922 { 2923 struct ata_taskfile *tf = &(qc->tf); 2924 struct scsi_cmnd *scmd = qc->scsicmd; 2925 struct ata_device *dev = qc->dev; 2926 const u8 *cdb = scmd->cmnd; 2927 u16 fp; 2928 u16 cdb_offset = 0; 2929 2930 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2931 if (cdb[0] == VARIABLE_LENGTH_CMD) 2932 cdb_offset = 9; 2933 2934 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2935 if (tf->protocol == ATA_PROT_UNKNOWN) { 2936 fp = 1; 2937 goto invalid_fld; 2938 } 2939 2940 if ((cdb[2 + cdb_offset] & 0x3) == 0) { 2941 /* 2942 * When T_LENGTH is zero (No data is transferred), dir should 2943 * be DMA_NONE. 2944 */ 2945 if (scmd->sc_data_direction != DMA_NONE) { 2946 fp = 2 + cdb_offset; 2947 goto invalid_fld; 2948 } 2949 2950 if (ata_is_ncq(tf->protocol)) 2951 tf->protocol = ATA_PROT_NCQ_NODATA; 2952 } 2953 2954 /* enable LBA */ 2955 tf->flags |= ATA_TFLAG_LBA; 2956 2957 /* 2958 * 12 and 16 byte CDBs use different offsets to 2959 * provide the various register values. 2960 */ 2961 switch (cdb[0]) { 2962 case ATA_16: 2963 /* 2964 * 16-byte CDB - may contain extended commands. 2965 * 2966 * If that is the case, copy the upper byte register values. 2967 */ 2968 if (cdb[1] & 0x01) { 2969 tf->hob_feature = cdb[3]; 2970 tf->hob_nsect = cdb[5]; 2971 tf->hob_lbal = cdb[7]; 2972 tf->hob_lbam = cdb[9]; 2973 tf->hob_lbah = cdb[11]; 2974 tf->flags |= ATA_TFLAG_LBA48; 2975 } else 2976 tf->flags &= ~ATA_TFLAG_LBA48; 2977 2978 /* 2979 * Always copy low byte, device and command registers. 2980 */ 2981 tf->feature = cdb[4]; 2982 tf->nsect = cdb[6]; 2983 tf->lbal = cdb[8]; 2984 tf->lbam = cdb[10]; 2985 tf->lbah = cdb[12]; 2986 tf->device = cdb[13]; 2987 tf->command = cdb[14]; 2988 break; 2989 case ATA_12: 2990 /* 2991 * 12-byte CDB - incapable of extended commands. 2992 */ 2993 tf->flags &= ~ATA_TFLAG_LBA48; 2994 2995 tf->feature = cdb[3]; 2996 tf->nsect = cdb[4]; 2997 tf->lbal = cdb[5]; 2998 tf->lbam = cdb[6]; 2999 tf->lbah = cdb[7]; 3000 tf->device = cdb[8]; 3001 tf->command = cdb[9]; 3002 break; 3003 default: 3004 /* 3005 * 32-byte CDB - may contain extended command fields. 3006 * 3007 * If that is the case, copy the upper byte register values. 3008 */ 3009 if (cdb[10] & 0x01) { 3010 tf->hob_feature = cdb[20]; 3011 tf->hob_nsect = cdb[22]; 3012 tf->hob_lbal = cdb[16]; 3013 tf->hob_lbam = cdb[15]; 3014 tf->hob_lbah = cdb[14]; 3015 tf->flags |= ATA_TFLAG_LBA48; 3016 } else 3017 tf->flags &= ~ATA_TFLAG_LBA48; 3018 3019 tf->feature = cdb[21]; 3020 tf->nsect = cdb[23]; 3021 tf->lbal = cdb[19]; 3022 tf->lbam = cdb[18]; 3023 tf->lbah = cdb[17]; 3024 tf->device = cdb[24]; 3025 tf->command = cdb[25]; 3026 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3027 break; 3028 } 3029 3030 /* For NCQ commands copy the tag value */ 3031 if (ata_is_ncq(tf->protocol)) 3032 tf->nsect = qc->hw_tag << 3; 3033 3034 /* enforce correct master/slave bit */ 3035 tf->device = dev->devno ? 3036 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3037 3038 switch (tf->command) { 3039 /* READ/WRITE LONG use a non-standard sect_size */ 3040 case ATA_CMD_READ_LONG: 3041 case ATA_CMD_READ_LONG_ONCE: 3042 case ATA_CMD_WRITE_LONG: 3043 case ATA_CMD_WRITE_LONG_ONCE: 3044 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3045 fp = 1; 3046 goto invalid_fld; 3047 } 3048 qc->sect_size = scsi_bufflen(scmd); 3049 break; 3050 3051 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3052 case ATA_CMD_CFA_WRITE_NE: 3053 case ATA_CMD_CFA_TRANS_SECT: 3054 case ATA_CMD_CFA_WRITE_MULT_NE: 3055 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3056 case ATA_CMD_READ: 3057 case ATA_CMD_READ_EXT: 3058 case ATA_CMD_READ_QUEUED: 3059 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3060 case ATA_CMD_FPDMA_READ: 3061 case ATA_CMD_READ_MULTI: 3062 case ATA_CMD_READ_MULTI_EXT: 3063 case ATA_CMD_PIO_READ: 3064 case ATA_CMD_PIO_READ_EXT: 3065 case ATA_CMD_READ_STREAM_DMA_EXT: 3066 case ATA_CMD_READ_STREAM_EXT: 3067 case ATA_CMD_VERIFY: 3068 case ATA_CMD_VERIFY_EXT: 3069 case ATA_CMD_WRITE: 3070 case ATA_CMD_WRITE_EXT: 3071 case ATA_CMD_WRITE_FUA_EXT: 3072 case ATA_CMD_WRITE_QUEUED: 3073 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3074 case ATA_CMD_FPDMA_WRITE: 3075 case ATA_CMD_WRITE_MULTI: 3076 case ATA_CMD_WRITE_MULTI_EXT: 3077 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3078 case ATA_CMD_PIO_WRITE: 3079 case ATA_CMD_PIO_WRITE_EXT: 3080 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3081 case ATA_CMD_WRITE_STREAM_EXT: 3082 qc->sect_size = scmd->device->sector_size; 3083 break; 3084 3085 /* Everything else uses 512 byte "sectors" */ 3086 default: 3087 qc->sect_size = ATA_SECT_SIZE; 3088 } 3089 3090 /* 3091 * Set flags so that all registers will be written, pass on 3092 * write indication (used for PIO/DMA setup), result TF is 3093 * copied back and we don't whine too much about its failure. 3094 */ 3095 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3096 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3097 tf->flags |= ATA_TFLAG_WRITE; 3098 3099 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3100 3101 /* 3102 * Set transfer length. 3103 * 3104 * TODO: find out if we need to do more here to 3105 * cover scatter/gather case. 3106 */ 3107 ata_qc_set_pc_nbytes(qc); 3108 3109 /* We may not issue DMA commands if no DMA mode is set */ 3110 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { 3111 fp = 1; 3112 goto invalid_fld; 3113 } 3114 3115 /* We may not issue NCQ commands to devices not supporting NCQ */ 3116 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3117 fp = 1; 3118 goto invalid_fld; 3119 } 3120 3121 /* sanity check for pio multi commands */ 3122 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3123 fp = 1; 3124 goto invalid_fld; 3125 } 3126 3127 if (is_multi_taskfile(tf)) { 3128 unsigned int multi_count = 1 << (cdb[1] >> 5); 3129 3130 /* compare the passed through multi_count 3131 * with the cached multi_count of libata 3132 */ 3133 if (multi_count != dev->multi_count) 3134 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3135 multi_count); 3136 } 3137 3138 /* 3139 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3140 * SET_FEATURES - XFER MODE must be preceded/succeeded 3141 * by an update to hardware-specific registers for each 3142 * controller (i.e. the reason for ->set_piomode(), 3143 * ->set_dmamode(), and ->post_set_mode() hooks). 3144 */ 3145 if (tf->command == ATA_CMD_SET_FEATURES && 3146 tf->feature == SETFEATURES_XFER) { 3147 fp = (cdb[0] == ATA_16) ? 4 : 3; 3148 goto invalid_fld; 3149 } 3150 3151 /* 3152 * Filter TPM commands by default. These provide an 3153 * essentially uncontrolled encrypted "back door" between 3154 * applications and the disk. Set libata.allow_tpm=1 if you 3155 * have a real reason for wanting to use them. This ensures 3156 * that installed software cannot easily mess stuff up without 3157 * user intent. DVR type users will probably ship with this enabled 3158 * for movie content management. 3159 * 3160 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3161 * for this and should do in future but that it is not sufficient as 3162 * DCS is an optional feature set. Thus we also do the software filter 3163 * so that we comply with the TC consortium stated goal that the user 3164 * can turn off TC features of their system. 3165 */ 3166 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3167 fp = (cdb[0] == ATA_16) ? 14 : 9; 3168 goto invalid_fld; 3169 } 3170 3171 return 0; 3172 3173 invalid_fld: 3174 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3175 return 1; 3176 } 3177 3178 /** 3179 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3180 * @cmd: SCSI command being translated 3181 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3182 * @sector: Starting sector 3183 * @count: Total Range of request in logical sectors 3184 * 3185 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3186 * descriptor. 3187 * 3188 * Upto 64 entries of the format: 3189 * 63:48 Range Length 3190 * 47:0 LBA 3191 * 3192 * Range Length of 0 is ignored. 3193 * LBA's should be sorted order and not overlap. 3194 * 3195 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3196 * 3197 * Return: Number of bytes copied into sglist. 3198 */ 3199 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3200 u64 sector, u32 count) 3201 { 3202 struct scsi_device *sdp = cmd->device; 3203 size_t len = sdp->sector_size; 3204 size_t r; 3205 __le64 *buf; 3206 u32 i = 0; 3207 unsigned long flags; 3208 3209 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3210 3211 if (len > ATA_SCSI_RBUF_SIZE) 3212 len = ATA_SCSI_RBUF_SIZE; 3213 3214 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3215 buf = ((void *)ata_scsi_rbuf); 3216 memset(buf, 0, len); 3217 while (i < trmax) { 3218 u64 entry = sector | 3219 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3220 buf[i++] = __cpu_to_le64(entry); 3221 if (count <= 0xffff) 3222 break; 3223 count -= 0xffff; 3224 sector += 0xffff; 3225 } 3226 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3227 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3228 3229 return r; 3230 } 3231 3232 /** 3233 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3234 * @qc: Command to be translated 3235 * 3236 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3237 * an SCT Write Same command. 3238 * Based on WRITE SAME has the UNMAP flag: 3239 * 3240 * - When set translate to DSM TRIM 3241 * - When clear translate to SCT Write Same 3242 */ 3243 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3244 { 3245 struct ata_taskfile *tf = &qc->tf; 3246 struct scsi_cmnd *scmd = qc->scsicmd; 3247 struct scsi_device *sdp = scmd->device; 3248 size_t len = sdp->sector_size; 3249 struct ata_device *dev = qc->dev; 3250 const u8 *cdb = scmd->cmnd; 3251 u64 block; 3252 u32 n_block; 3253 const u32 trmax = len >> 3; 3254 u32 size; 3255 u16 fp; 3256 u8 bp = 0xff; 3257 u8 unmap = cdb[1] & 0x8; 3258 3259 /* we may not issue DMA commands if no DMA mode is set */ 3260 if (unlikely(!ata_dma_enabled(dev))) 3261 goto invalid_opcode; 3262 3263 /* 3264 * We only allow sending this command through the block layer, 3265 * as it modifies the DATA OUT buffer, which would corrupt user 3266 * memory for SG_IO commands. 3267 */ 3268 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) 3269 goto invalid_opcode; 3270 3271 if (unlikely(scmd->cmd_len < 16)) { 3272 fp = 15; 3273 goto invalid_fld; 3274 } 3275 scsi_16_lba_len(cdb, &block, &n_block); 3276 3277 if (!unmap || 3278 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3279 !ata_id_has_trim(dev->id)) { 3280 fp = 1; 3281 bp = 3; 3282 goto invalid_fld; 3283 } 3284 /* If the request is too large the cmd is invalid */ 3285 if (n_block > 0xffff * trmax) { 3286 fp = 2; 3287 goto invalid_fld; 3288 } 3289 3290 /* 3291 * WRITE SAME always has a sector sized buffer as payload, this 3292 * should never be a multiple entry S/G list. 3293 */ 3294 if (!scsi_sg_count(scmd)) 3295 goto invalid_param_len; 3296 3297 /* 3298 * size must match sector size in bytes 3299 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3300 * is defined as number of 512 byte blocks to be transferred. 3301 */ 3302 3303 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3304 if (size != len) 3305 goto invalid_param_len; 3306 3307 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3308 /* Newer devices support queued TRIM commands */ 3309 tf->protocol = ATA_PROT_NCQ; 3310 tf->command = ATA_CMD_FPDMA_SEND; 3311 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3312 tf->nsect = qc->hw_tag << 3; 3313 tf->hob_feature = (size / 512) >> 8; 3314 tf->feature = size / 512; 3315 3316 tf->auxiliary = 1; 3317 } else { 3318 tf->protocol = ATA_PROT_DMA; 3319 tf->hob_feature = 0; 3320 tf->feature = ATA_DSM_TRIM; 3321 tf->hob_nsect = (size / 512) >> 8; 3322 tf->nsect = size / 512; 3323 tf->command = ATA_CMD_DSM; 3324 } 3325 3326 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3327 ATA_TFLAG_WRITE; 3328 3329 ata_qc_set_pc_nbytes(qc); 3330 3331 return 0; 3332 3333 invalid_fld: 3334 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3335 return 1; 3336 invalid_param_len: 3337 /* "Parameter list length error" */ 3338 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3339 return 1; 3340 invalid_opcode: 3341 /* "Invalid command operation code" */ 3342 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3343 return 1; 3344 } 3345 3346 /** 3347 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3348 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3349 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3350 * 3351 * Yields a subset to satisfy scsi_report_opcode() 3352 * 3353 * LOCKING: 3354 * spin_lock_irqsave(host lock) 3355 */ 3356 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3357 { 3358 struct ata_device *dev = args->dev; 3359 u8 *cdb = args->cmd->cmnd; 3360 u8 supported = 0, cdlp = 0, rwcdlp = 0; 3361 unsigned int err = 0; 3362 3363 if (cdb[2] != 1 && cdb[2] != 3) { 3364 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3365 err = 2; 3366 goto out; 3367 } 3368 3369 switch (cdb[3]) { 3370 case INQUIRY: 3371 case MODE_SENSE: 3372 case MODE_SENSE_10: 3373 case READ_CAPACITY: 3374 case SERVICE_ACTION_IN_16: 3375 case REPORT_LUNS: 3376 case REQUEST_SENSE: 3377 case SYNCHRONIZE_CACHE: 3378 case SYNCHRONIZE_CACHE_16: 3379 case REZERO_UNIT: 3380 case SEEK_6: 3381 case SEEK_10: 3382 case TEST_UNIT_READY: 3383 case SEND_DIAGNOSTIC: 3384 case MAINTENANCE_IN: 3385 case READ_6: 3386 case READ_10: 3387 case WRITE_6: 3388 case WRITE_10: 3389 case ATA_12: 3390 case ATA_16: 3391 case VERIFY: 3392 case VERIFY_16: 3393 case MODE_SELECT: 3394 case MODE_SELECT_10: 3395 case START_STOP: 3396 supported = 3; 3397 break; 3398 case READ_16: 3399 supported = 3; 3400 if (dev->flags & ATA_DFLAG_CDL) { 3401 /* 3402 * CDL read descriptors map to the T2A page, that is, 3403 * rwcdlp = 0x01 and cdlp = 0x01 3404 */ 3405 rwcdlp = 0x01; 3406 cdlp = 0x01 << 3; 3407 } 3408 break; 3409 case WRITE_16: 3410 supported = 3; 3411 if (dev->flags & ATA_DFLAG_CDL) { 3412 /* 3413 * CDL write descriptors map to the T2B page, that is, 3414 * rwcdlp = 0x01 and cdlp = 0x02 3415 */ 3416 rwcdlp = 0x01; 3417 cdlp = 0x02 << 3; 3418 } 3419 break; 3420 case ZBC_IN: 3421 case ZBC_OUT: 3422 if (ata_id_zoned_cap(dev->id) || 3423 dev->class == ATA_DEV_ZAC) 3424 supported = 3; 3425 break; 3426 case SECURITY_PROTOCOL_IN: 3427 case SECURITY_PROTOCOL_OUT: 3428 if (dev->flags & ATA_DFLAG_TRUSTED) 3429 supported = 3; 3430 break; 3431 default: 3432 break; 3433 } 3434 out: 3435 /* One command format */ 3436 rbuf[0] = rwcdlp; 3437 rbuf[1] = cdlp | supported; 3438 return err; 3439 } 3440 3441 /** 3442 * ata_scsi_report_zones_complete - convert ATA output 3443 * @qc: command structure returning the data 3444 * 3445 * Convert T-13 little-endian field representation into 3446 * T-10 big-endian field representation. 3447 * What a mess. 3448 */ 3449 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3450 { 3451 struct scsi_cmnd *scmd = qc->scsicmd; 3452 struct sg_mapping_iter miter; 3453 unsigned long flags; 3454 unsigned int bytes = 0; 3455 3456 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3457 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3458 3459 local_irq_save(flags); 3460 while (sg_miter_next(&miter)) { 3461 unsigned int offset = 0; 3462 3463 if (bytes == 0) { 3464 char *hdr; 3465 u32 list_length; 3466 u64 max_lba, opt_lba; 3467 u16 same; 3468 3469 /* Swizzle header */ 3470 hdr = miter.addr; 3471 list_length = get_unaligned_le32(&hdr[0]); 3472 same = get_unaligned_le16(&hdr[4]); 3473 max_lba = get_unaligned_le64(&hdr[8]); 3474 opt_lba = get_unaligned_le64(&hdr[16]); 3475 put_unaligned_be32(list_length, &hdr[0]); 3476 hdr[4] = same & 0xf; 3477 put_unaligned_be64(max_lba, &hdr[8]); 3478 put_unaligned_be64(opt_lba, &hdr[16]); 3479 offset += 64; 3480 bytes += 64; 3481 } 3482 while (offset < miter.length) { 3483 char *rec; 3484 u8 cond, type, non_seq, reset; 3485 u64 size, start, wp; 3486 3487 /* Swizzle zone descriptor */ 3488 rec = miter.addr + offset; 3489 type = rec[0] & 0xf; 3490 cond = (rec[1] >> 4) & 0xf; 3491 non_seq = (rec[1] & 2); 3492 reset = (rec[1] & 1); 3493 size = get_unaligned_le64(&rec[8]); 3494 start = get_unaligned_le64(&rec[16]); 3495 wp = get_unaligned_le64(&rec[24]); 3496 rec[0] = type; 3497 rec[1] = (cond << 4) | non_seq | reset; 3498 put_unaligned_be64(size, &rec[8]); 3499 put_unaligned_be64(start, &rec[16]); 3500 put_unaligned_be64(wp, &rec[24]); 3501 WARN_ON(offset + 64 > miter.length); 3502 offset += 64; 3503 bytes += 64; 3504 } 3505 } 3506 sg_miter_stop(&miter); 3507 local_irq_restore(flags); 3508 3509 ata_scsi_qc_complete(qc); 3510 } 3511 3512 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3513 { 3514 struct ata_taskfile *tf = &qc->tf; 3515 struct scsi_cmnd *scmd = qc->scsicmd; 3516 const u8 *cdb = scmd->cmnd; 3517 u16 sect, fp = (u16)-1; 3518 u8 sa, options, bp = 0xff; 3519 u64 block; 3520 u32 n_block; 3521 3522 if (unlikely(scmd->cmd_len < 16)) { 3523 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3524 scmd->cmd_len); 3525 fp = 15; 3526 goto invalid_fld; 3527 } 3528 scsi_16_lba_len(cdb, &block, &n_block); 3529 if (n_block != scsi_bufflen(scmd)) { 3530 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3531 n_block, scsi_bufflen(scmd)); 3532 goto invalid_param_len; 3533 } 3534 sa = cdb[1] & 0x1f; 3535 if (sa != ZI_REPORT_ZONES) { 3536 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3537 fp = 1; 3538 goto invalid_fld; 3539 } 3540 /* 3541 * ZAC allows only for transfers in 512 byte blocks, 3542 * and uses a 16 bit value for the transfer count. 3543 */ 3544 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3545 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3546 goto invalid_param_len; 3547 } 3548 sect = n_block / 512; 3549 options = cdb[14] & 0xbf; 3550 3551 if (ata_ncq_enabled(qc->dev) && 3552 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3553 tf->protocol = ATA_PROT_NCQ; 3554 tf->command = ATA_CMD_FPDMA_RECV; 3555 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3556 tf->nsect = qc->hw_tag << 3; 3557 tf->feature = sect & 0xff; 3558 tf->hob_feature = (sect >> 8) & 0xff; 3559 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3560 } else { 3561 tf->command = ATA_CMD_ZAC_MGMT_IN; 3562 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3563 tf->protocol = ATA_PROT_DMA; 3564 tf->hob_feature = options; 3565 tf->hob_nsect = (sect >> 8) & 0xff; 3566 tf->nsect = sect & 0xff; 3567 } 3568 tf->device = ATA_LBA; 3569 tf->lbah = (block >> 16) & 0xff; 3570 tf->lbam = (block >> 8) & 0xff; 3571 tf->lbal = block & 0xff; 3572 tf->hob_lbah = (block >> 40) & 0xff; 3573 tf->hob_lbam = (block >> 32) & 0xff; 3574 tf->hob_lbal = (block >> 24) & 0xff; 3575 3576 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3577 qc->flags |= ATA_QCFLAG_RESULT_TF; 3578 3579 ata_qc_set_pc_nbytes(qc); 3580 3581 qc->complete_fn = ata_scsi_report_zones_complete; 3582 3583 return 0; 3584 3585 invalid_fld: 3586 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3587 return 1; 3588 3589 invalid_param_len: 3590 /* "Parameter list length error" */ 3591 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3592 return 1; 3593 } 3594 3595 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3596 { 3597 struct ata_taskfile *tf = &qc->tf; 3598 struct scsi_cmnd *scmd = qc->scsicmd; 3599 struct ata_device *dev = qc->dev; 3600 const u8 *cdb = scmd->cmnd; 3601 u8 all, sa; 3602 u64 block; 3603 u32 n_block; 3604 u16 fp = (u16)-1; 3605 3606 if (unlikely(scmd->cmd_len < 16)) { 3607 fp = 15; 3608 goto invalid_fld; 3609 } 3610 3611 sa = cdb[1] & 0x1f; 3612 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3613 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3614 fp = 1; 3615 goto invalid_fld; 3616 } 3617 3618 scsi_16_lba_len(cdb, &block, &n_block); 3619 if (n_block) { 3620 /* 3621 * ZAC MANAGEMENT OUT doesn't define any length 3622 */ 3623 goto invalid_param_len; 3624 } 3625 3626 all = cdb[14] & 0x1; 3627 if (all) { 3628 /* 3629 * Ignore the block address (zone ID) as defined by ZBC. 3630 */ 3631 block = 0; 3632 } else if (block >= dev->n_sectors) { 3633 /* 3634 * Block must be a valid zone ID (a zone start LBA). 3635 */ 3636 fp = 2; 3637 goto invalid_fld; 3638 } 3639 3640 if (ata_ncq_enabled(qc->dev) && 3641 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3642 tf->protocol = ATA_PROT_NCQ_NODATA; 3643 tf->command = ATA_CMD_NCQ_NON_DATA; 3644 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3645 tf->nsect = qc->hw_tag << 3; 3646 tf->auxiliary = sa | ((u16)all << 8); 3647 } else { 3648 tf->protocol = ATA_PROT_NODATA; 3649 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3650 tf->feature = sa; 3651 tf->hob_feature = all; 3652 } 3653 tf->lbah = (block >> 16) & 0xff; 3654 tf->lbam = (block >> 8) & 0xff; 3655 tf->lbal = block & 0xff; 3656 tf->hob_lbah = (block >> 40) & 0xff; 3657 tf->hob_lbam = (block >> 32) & 0xff; 3658 tf->hob_lbal = (block >> 24) & 0xff; 3659 tf->device = ATA_LBA; 3660 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3661 3662 return 0; 3663 3664 invalid_fld: 3665 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3666 return 1; 3667 invalid_param_len: 3668 /* "Parameter list length error" */ 3669 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3670 return 1; 3671 } 3672 3673 /** 3674 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3675 * @qc: Storage for translated ATA taskfile 3676 * @buf: input buffer 3677 * @len: number of valid bytes in the input buffer 3678 * @fp: out parameter for the failed field on error 3679 * 3680 * Prepare a taskfile to modify caching information for the device. 3681 * 3682 * LOCKING: 3683 * None. 3684 */ 3685 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3686 const u8 *buf, int len, u16 *fp) 3687 { 3688 struct ata_taskfile *tf = &qc->tf; 3689 struct ata_device *dev = qc->dev; 3690 u8 mpage[CACHE_MPAGE_LEN]; 3691 u8 wce; 3692 int i; 3693 3694 /* 3695 * The first two bytes of def_cache_mpage are a header, so offsets 3696 * in mpage are off by 2 compared to buf. Same for len. 3697 */ 3698 3699 if (len != CACHE_MPAGE_LEN - 2) { 3700 *fp = min(len, CACHE_MPAGE_LEN - 2); 3701 return -EINVAL; 3702 } 3703 3704 wce = buf[0] & (1 << 2); 3705 3706 /* 3707 * Check that read-only bits are not modified. 3708 */ 3709 ata_msense_caching(dev->id, mpage, false); 3710 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3711 if (i == 0) 3712 continue; 3713 if (mpage[i + 2] != buf[i]) { 3714 *fp = i; 3715 return -EINVAL; 3716 } 3717 } 3718 3719 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3720 tf->protocol = ATA_PROT_NODATA; 3721 tf->nsect = 0; 3722 tf->command = ATA_CMD_SET_FEATURES; 3723 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3724 return 0; 3725 } 3726 3727 /* 3728 * Simulate MODE SELECT control mode page, sub-page 0. 3729 */ 3730 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, 3731 const u8 *buf, int len, u16 *fp) 3732 { 3733 struct ata_device *dev = qc->dev; 3734 u8 mpage[CONTROL_MPAGE_LEN]; 3735 u8 d_sense; 3736 int i; 3737 3738 /* 3739 * The first two bytes of def_control_mpage are a header, so offsets 3740 * in mpage are off by 2 compared to buf. Same for len. 3741 */ 3742 3743 if (len != CONTROL_MPAGE_LEN - 2) { 3744 *fp = min(len, CONTROL_MPAGE_LEN - 2); 3745 return -EINVAL; 3746 } 3747 3748 d_sense = buf[0] & (1 << 2); 3749 3750 /* 3751 * Check that read-only bits are not modified. 3752 */ 3753 ata_msense_control_spg0(dev, mpage, false); 3754 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3755 if (i == 0) 3756 continue; 3757 if (mpage[2 + i] != buf[i]) { 3758 *fp = i; 3759 return -EINVAL; 3760 } 3761 } 3762 if (d_sense & (1 << 2)) 3763 dev->flags |= ATA_DFLAG_D_SENSE; 3764 else 3765 dev->flags &= ~ATA_DFLAG_D_SENSE; 3766 return 0; 3767 } 3768 3769 /* 3770 * Translate MODE SELECT control mode page, sub-pages f2h (ATA feature mode 3771 * page) into a SET FEATURES command. 3772 */ 3773 static unsigned int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, 3774 const u8 *buf, int len, 3775 u16 *fp) 3776 { 3777 struct ata_device *dev = qc->dev; 3778 struct ata_taskfile *tf = &qc->tf; 3779 u8 cdl_action; 3780 3781 /* 3782 * The first four bytes of ATA Feature Control mode page are a header, 3783 * so offsets in mpage are off by 4 compared to buf. Same for len. 3784 */ 3785 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { 3786 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); 3787 return -EINVAL; 3788 } 3789 3790 /* Check cdl_ctrl */ 3791 switch (buf[0] & 0x03) { 3792 case 0: 3793 /* Disable CDL */ 3794 cdl_action = 0; 3795 dev->flags &= ~ATA_DFLAG_CDL_ENABLED; 3796 break; 3797 case 0x02: 3798 /* Enable CDL T2A/T2B: NCQ priority must be disabled */ 3799 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { 3800 ata_dev_err(dev, 3801 "NCQ priority must be disabled to enable CDL\n"); 3802 return -EINVAL; 3803 } 3804 cdl_action = 1; 3805 dev->flags |= ATA_DFLAG_CDL_ENABLED; 3806 break; 3807 default: 3808 *fp = 0; 3809 return -EINVAL; 3810 } 3811 3812 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3813 tf->protocol = ATA_PROT_NODATA; 3814 tf->command = ATA_CMD_SET_FEATURES; 3815 tf->feature = SETFEATURES_CDL; 3816 tf->nsect = cdl_action; 3817 3818 return 1; 3819 } 3820 3821 /** 3822 * ata_mselect_control - Simulate MODE SELECT for control page 3823 * @qc: Storage for translated ATA taskfile 3824 * @spg: target sub-page of the control page 3825 * @buf: input buffer 3826 * @len: number of valid bytes in the input buffer 3827 * @fp: out parameter for the failed field on error 3828 * 3829 * Prepare a taskfile to modify caching information for the device. 3830 * 3831 * LOCKING: 3832 * None. 3833 */ 3834 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, 3835 const u8 *buf, int len, u16 *fp) 3836 { 3837 switch (spg) { 3838 case 0: 3839 return ata_mselect_control_spg0(qc, buf, len, fp); 3840 case ATA_FEATURE_SUB_MPAGE: 3841 return ata_mselect_control_ata_feature(qc, buf, len, fp); 3842 default: 3843 return -EINVAL; 3844 } 3845 } 3846 3847 /** 3848 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3849 * @qc: Storage for translated ATA taskfile 3850 * 3851 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3852 * Assume this is invoked for direct access devices (e.g. disks) only. 3853 * There should be no block descriptor for other device types. 3854 * 3855 * LOCKING: 3856 * spin_lock_irqsave(host lock) 3857 */ 3858 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3859 { 3860 struct scsi_cmnd *scmd = qc->scsicmd; 3861 const u8 *cdb = scmd->cmnd; 3862 u8 pg, spg; 3863 unsigned six_byte, pg_len, hdr_len, bd_len; 3864 int len, ret; 3865 u16 fp = (u16)-1; 3866 u8 bp = 0xff; 3867 u8 buffer[64]; 3868 const u8 *p = buffer; 3869 3870 six_byte = (cdb[0] == MODE_SELECT); 3871 if (six_byte) { 3872 if (scmd->cmd_len < 5) { 3873 fp = 4; 3874 goto invalid_fld; 3875 } 3876 3877 len = cdb[4]; 3878 hdr_len = 4; 3879 } else { 3880 if (scmd->cmd_len < 9) { 3881 fp = 8; 3882 goto invalid_fld; 3883 } 3884 3885 len = get_unaligned_be16(&cdb[7]); 3886 hdr_len = 8; 3887 } 3888 3889 /* We only support PF=1, SP=0. */ 3890 if ((cdb[1] & 0x11) != 0x10) { 3891 fp = 1; 3892 bp = (cdb[1] & 0x01) ? 1 : 5; 3893 goto invalid_fld; 3894 } 3895 3896 /* Test early for possible overrun. */ 3897 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3898 goto invalid_param_len; 3899 3900 /* Move past header and block descriptors. */ 3901 if (len < hdr_len) 3902 goto invalid_param_len; 3903 3904 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3905 buffer, sizeof(buffer))) 3906 goto invalid_param_len; 3907 3908 if (six_byte) 3909 bd_len = p[3]; 3910 else 3911 bd_len = get_unaligned_be16(&p[6]); 3912 3913 len -= hdr_len; 3914 p += hdr_len; 3915 if (len < bd_len) 3916 goto invalid_param_len; 3917 if (bd_len != 0 && bd_len != 8) { 3918 fp = (six_byte) ? 3 : 6; 3919 fp += bd_len + hdr_len; 3920 goto invalid_param; 3921 } 3922 3923 len -= bd_len; 3924 p += bd_len; 3925 if (len == 0) 3926 goto skip; 3927 3928 /* Parse both possible formats for the mode page headers. */ 3929 pg = p[0] & 0x3f; 3930 if (p[0] & 0x40) { 3931 if (len < 4) 3932 goto invalid_param_len; 3933 3934 spg = p[1]; 3935 pg_len = get_unaligned_be16(&p[2]); 3936 p += 4; 3937 len -= 4; 3938 } else { 3939 if (len < 2) 3940 goto invalid_param_len; 3941 3942 spg = 0; 3943 pg_len = p[1]; 3944 p += 2; 3945 len -= 2; 3946 } 3947 3948 /* 3949 * Supported subpages: all subpages and ATA feature sub-page f2h of 3950 * the control page. 3951 */ 3952 if (spg) { 3953 switch (spg) { 3954 case ALL_SUB_MPAGES: 3955 /* All subpages is not supported for the control page */ 3956 if (pg == CONTROL_MPAGE) { 3957 fp = (p[0] & 0x40) ? 1 : 0; 3958 fp += hdr_len + bd_len; 3959 goto invalid_param; 3960 } 3961 break; 3962 case ATA_FEATURE_SUB_MPAGE: 3963 if (qc->dev->flags & ATA_DFLAG_CDL && 3964 pg == CONTROL_MPAGE) 3965 break; 3966 fallthrough; 3967 default: 3968 fp = (p[0] & 0x40) ? 1 : 0; 3969 fp += hdr_len + bd_len; 3970 goto invalid_param; 3971 } 3972 } 3973 if (pg_len > len) 3974 goto invalid_param_len; 3975 3976 switch (pg) { 3977 case CACHE_MPAGE: 3978 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3979 fp += hdr_len + bd_len; 3980 goto invalid_param; 3981 } 3982 break; 3983 case CONTROL_MPAGE: 3984 ret = ata_mselect_control(qc, spg, p, pg_len, &fp); 3985 if (ret < 0) { 3986 fp += hdr_len + bd_len; 3987 goto invalid_param; 3988 } 3989 if (!ret) 3990 goto skip; /* No ATA command to send */ 3991 break; 3992 default: 3993 /* Invalid page code */ 3994 fp = bd_len + hdr_len; 3995 goto invalid_param; 3996 } 3997 3998 /* 3999 * Only one page has changeable data, so we only support setting one 4000 * page at a time. 4001 */ 4002 if (len > pg_len) 4003 goto invalid_param; 4004 4005 return 0; 4006 4007 invalid_fld: 4008 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4009 return 1; 4010 4011 invalid_param: 4012 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4013 return 1; 4014 4015 invalid_param_len: 4016 /* "Parameter list length error" */ 4017 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4018 return 1; 4019 4020 skip: 4021 scmd->result = SAM_STAT_GOOD; 4022 return 1; 4023 } 4024 4025 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4026 { 4027 if (len == 0) 4028 return ATA_CMD_TRUSTED_NONDATA; 4029 else if (send) 4030 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4031 else 4032 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4033 } 4034 4035 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4036 { 4037 struct scsi_cmnd *scmd = qc->scsicmd; 4038 const u8 *cdb = scmd->cmnd; 4039 struct ata_taskfile *tf = &qc->tf; 4040 u8 secp = cdb[1]; 4041 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4042 u16 spsp = get_unaligned_be16(&cdb[2]); 4043 u32 len = get_unaligned_be32(&cdb[6]); 4044 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4045 4046 /* 4047 * We don't support the ATA "security" protocol. 4048 */ 4049 if (secp == 0xef) { 4050 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4051 return 1; 4052 } 4053 4054 if (cdb[4] & 7) { /* INC_512 */ 4055 if (len > 0xffff) { 4056 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4057 return 1; 4058 } 4059 } else { 4060 if (len > 0x01fffe00) { 4061 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4062 return 1; 4063 } 4064 4065 /* convert to the sector-based ATA addressing */ 4066 len = (len + 511) / 512; 4067 } 4068 4069 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4070 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4071 if (send) 4072 tf->flags |= ATA_TFLAG_WRITE; 4073 tf->command = ata_scsi_trusted_op(len, send, dma); 4074 tf->feature = secp; 4075 tf->lbam = spsp & 0xff; 4076 tf->lbah = spsp >> 8; 4077 4078 if (len) { 4079 tf->nsect = len & 0xff; 4080 tf->lbal = len >> 8; 4081 } else { 4082 if (!send) 4083 tf->lbah = (1 << 7); 4084 } 4085 4086 ata_qc_set_pc_nbytes(qc); 4087 return 0; 4088 } 4089 4090 /** 4091 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4092 * @qc: Command to be translated 4093 * 4094 * Translate a SCSI variable length CDB to specified commands. 4095 * It checks a service action value in CDB to call corresponding handler. 4096 * 4097 * RETURNS: 4098 * Zero on success, non-zero on failure 4099 * 4100 */ 4101 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4102 { 4103 struct scsi_cmnd *scmd = qc->scsicmd; 4104 const u8 *cdb = scmd->cmnd; 4105 const u16 sa = get_unaligned_be16(&cdb[8]); 4106 4107 /* 4108 * if service action represents a ata pass-thru(32) command, 4109 * then pass it to ata_scsi_pass_thru handler. 4110 */ 4111 if (sa == ATA_32) 4112 return ata_scsi_pass_thru(qc); 4113 4114 /* unsupported service action */ 4115 return 1; 4116 } 4117 4118 /** 4119 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4120 * @dev: ATA device 4121 * @cmd: SCSI command opcode to consider 4122 * 4123 * Look up the SCSI command given, and determine whether the 4124 * SCSI command is to be translated or simulated. 4125 * 4126 * RETURNS: 4127 * Pointer to translation function if possible, %NULL if not. 4128 */ 4129 4130 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4131 { 4132 switch (cmd) { 4133 case READ_6: 4134 case READ_10: 4135 case READ_16: 4136 4137 case WRITE_6: 4138 case WRITE_10: 4139 case WRITE_16: 4140 return ata_scsi_rw_xlat; 4141 4142 case WRITE_SAME_16: 4143 return ata_scsi_write_same_xlat; 4144 4145 case SYNCHRONIZE_CACHE: 4146 case SYNCHRONIZE_CACHE_16: 4147 if (ata_try_flush_cache(dev)) 4148 return ata_scsi_flush_xlat; 4149 break; 4150 4151 case VERIFY: 4152 case VERIFY_16: 4153 return ata_scsi_verify_xlat; 4154 4155 case ATA_12: 4156 case ATA_16: 4157 return ata_scsi_pass_thru; 4158 4159 case VARIABLE_LENGTH_CMD: 4160 return ata_scsi_var_len_cdb_xlat; 4161 4162 case MODE_SELECT: 4163 case MODE_SELECT_10: 4164 return ata_scsi_mode_select_xlat; 4165 4166 case ZBC_IN: 4167 return ata_scsi_zbc_in_xlat; 4168 4169 case ZBC_OUT: 4170 return ata_scsi_zbc_out_xlat; 4171 4172 case SECURITY_PROTOCOL_IN: 4173 case SECURITY_PROTOCOL_OUT: 4174 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4175 break; 4176 return ata_scsi_security_inout_xlat; 4177 4178 case START_STOP: 4179 return ata_scsi_start_stop_xlat; 4180 } 4181 4182 return NULL; 4183 } 4184 4185 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4186 { 4187 struct ata_port *ap = dev->link->ap; 4188 u8 scsi_op = scmd->cmnd[0]; 4189 ata_xlat_func_t xlat_func; 4190 4191 /* 4192 * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). 4193 * However, this check is done without holding the ap->lock (a libata 4194 * specific lock), so we can have received an error irq since then, 4195 * therefore we must check if EH is pending, while holding ap->lock. 4196 */ 4197 if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) 4198 return SCSI_MLQUEUE_DEVICE_BUSY; 4199 4200 if (unlikely(!scmd->cmd_len)) 4201 goto bad_cdb_len; 4202 4203 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4204 if (unlikely(scmd->cmd_len > dev->cdb_len)) 4205 goto bad_cdb_len; 4206 4207 xlat_func = ata_get_xlat_func(dev, scsi_op); 4208 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4209 /* relay SCSI command to ATAPI device */ 4210 int len = COMMAND_SIZE(scsi_op); 4211 4212 if (unlikely(len > scmd->cmd_len || 4213 len > dev->cdb_len || 4214 scmd->cmd_len > ATAPI_CDB_LEN)) 4215 goto bad_cdb_len; 4216 4217 xlat_func = atapi_xlat; 4218 } else { 4219 /* ATA_16 passthru, treat as an ATA command */ 4220 if (unlikely(scmd->cmd_len > 16)) 4221 goto bad_cdb_len; 4222 4223 xlat_func = ata_get_xlat_func(dev, scsi_op); 4224 } 4225 4226 if (xlat_func) 4227 return ata_scsi_translate(dev, scmd, xlat_func); 4228 4229 ata_scsi_simulate(dev, scmd); 4230 4231 return 0; 4232 4233 bad_cdb_len: 4234 scmd->result = DID_ERROR << 16; 4235 scsi_done(scmd); 4236 return 0; 4237 } 4238 4239 /** 4240 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4241 * @shost: SCSI host of command to be sent 4242 * @cmd: SCSI command to be sent 4243 * 4244 * In some cases, this function translates SCSI commands into 4245 * ATA taskfiles, and queues the taskfiles to be sent to 4246 * hardware. In other cases, this function simulates a 4247 * SCSI device by evaluating and responding to certain 4248 * SCSI commands. This creates the overall effect of 4249 * ATA and ATAPI devices appearing as SCSI devices. 4250 * 4251 * LOCKING: 4252 * ATA host lock 4253 * 4254 * RETURNS: 4255 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4256 * 0 otherwise. 4257 */ 4258 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4259 { 4260 struct ata_port *ap; 4261 struct ata_device *dev; 4262 struct scsi_device *scsidev = cmd->device; 4263 int rc = 0; 4264 unsigned long irq_flags; 4265 4266 ap = ata_shost_to_port(shost); 4267 4268 spin_lock_irqsave(ap->lock, irq_flags); 4269 4270 dev = ata_scsi_find_dev(ap, scsidev); 4271 if (likely(dev)) 4272 rc = __ata_scsi_queuecmd(cmd, dev); 4273 else { 4274 cmd->result = (DID_BAD_TARGET << 16); 4275 scsi_done(cmd); 4276 } 4277 4278 spin_unlock_irqrestore(ap->lock, irq_flags); 4279 4280 return rc; 4281 } 4282 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4283 4284 /** 4285 * ata_scsi_simulate - simulate SCSI command on ATA device 4286 * @dev: the target device 4287 * @cmd: SCSI command being sent to device. 4288 * 4289 * Interprets and directly executes a select list of SCSI commands 4290 * that can be handled internally. 4291 * 4292 * LOCKING: 4293 * spin_lock_irqsave(host lock) 4294 */ 4295 4296 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4297 { 4298 struct ata_scsi_args args; 4299 const u8 *scsicmd = cmd->cmnd; 4300 u8 tmp8; 4301 4302 args.dev = dev; 4303 args.id = dev->id; 4304 args.cmd = cmd; 4305 4306 switch(scsicmd[0]) { 4307 case INQUIRY: 4308 if (scsicmd[1] & 2) /* is CmdDt set? */ 4309 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4310 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4311 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4312 else switch (scsicmd[2]) { 4313 case 0x00: 4314 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4315 break; 4316 case 0x80: 4317 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4318 break; 4319 case 0x83: 4320 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4321 break; 4322 case 0x89: 4323 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4324 break; 4325 case 0xb0: 4326 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4327 break; 4328 case 0xb1: 4329 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4330 break; 4331 case 0xb2: 4332 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4333 break; 4334 case 0xb6: 4335 if (dev->flags & ATA_DFLAG_ZAC) 4336 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4337 else 4338 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4339 break; 4340 case 0xb9: 4341 if (dev->cpr_log) 4342 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9); 4343 else 4344 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4345 break; 4346 default: 4347 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4348 break; 4349 } 4350 break; 4351 4352 case MODE_SENSE: 4353 case MODE_SENSE_10: 4354 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4355 break; 4356 4357 case READ_CAPACITY: 4358 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4359 break; 4360 4361 case SERVICE_ACTION_IN_16: 4362 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4363 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4364 else 4365 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4366 break; 4367 4368 case REPORT_LUNS: 4369 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4370 break; 4371 4372 case REQUEST_SENSE: 4373 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4374 break; 4375 4376 /* if we reach this, then writeback caching is disabled, 4377 * turning this into a no-op. 4378 */ 4379 case SYNCHRONIZE_CACHE: 4380 case SYNCHRONIZE_CACHE_16: 4381 fallthrough; 4382 4383 /* no-op's, complete with success */ 4384 case REZERO_UNIT: 4385 case SEEK_6: 4386 case SEEK_10: 4387 case TEST_UNIT_READY: 4388 break; 4389 4390 case SEND_DIAGNOSTIC: 4391 tmp8 = scsicmd[1] & ~(1 << 3); 4392 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4393 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4394 break; 4395 4396 case MAINTENANCE_IN: 4397 if ((scsicmd[1] & 0x1f) == MI_REPORT_SUPPORTED_OPERATION_CODES) 4398 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4399 else 4400 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4401 break; 4402 4403 /* all other commands */ 4404 default: 4405 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4406 /* "Invalid command operation code" */ 4407 break; 4408 } 4409 4410 scsi_done(cmd); 4411 } 4412 4413 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) 4414 { 4415 int i, rc; 4416 4417 for (i = 0; i < host->n_ports; i++) { 4418 struct ata_port *ap = host->ports[i]; 4419 struct Scsi_Host *shost; 4420 4421 rc = -ENOMEM; 4422 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4423 if (!shost) 4424 goto err_alloc; 4425 4426 shost->eh_noresume = 1; 4427 *(struct ata_port **)&shost->hostdata[0] = ap; 4428 ap->scsi_host = shost; 4429 4430 shost->transportt = ata_scsi_transport_template; 4431 shost->unique_id = ap->print_id; 4432 shost->max_id = 16; 4433 shost->max_lun = 1; 4434 shost->max_channel = 1; 4435 shost->max_cmd_len = 32; 4436 4437 /* Schedule policy is determined by ->qc_defer() 4438 * callback and it needs to see every deferred qc. 4439 * Set host_blocked to 1 to prevent SCSI midlayer from 4440 * automatically deferring requests. 4441 */ 4442 shost->max_host_blocked = 1; 4443 4444 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4445 if (rc) 4446 goto err_alloc; 4447 } 4448 4449 return 0; 4450 4451 err_alloc: 4452 while (--i >= 0) { 4453 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4454 4455 /* scsi_host_put() is in ata_devres_release() */ 4456 scsi_remove_host(shost); 4457 } 4458 return rc; 4459 } 4460 4461 #ifdef CONFIG_OF 4462 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4463 { 4464 struct scsi_device *sdev = dev->sdev; 4465 struct device *d = ap->host->dev; 4466 struct device_node *np = d->of_node; 4467 struct device_node *child; 4468 4469 for_each_available_child_of_node(np, child) { 4470 int ret; 4471 u32 val; 4472 4473 ret = of_property_read_u32(child, "reg", &val); 4474 if (ret) 4475 continue; 4476 if (val == dev->devno) { 4477 dev_dbg(d, "found matching device node\n"); 4478 sdev->sdev_gendev.of_node = child; 4479 return; 4480 } 4481 } 4482 } 4483 #else 4484 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4485 { 4486 } 4487 #endif 4488 4489 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4490 { 4491 int tries = 5; 4492 struct ata_device *last_failed_dev = NULL; 4493 struct ata_link *link; 4494 struct ata_device *dev; 4495 4496 repeat: 4497 ata_for_each_link(link, ap, EDGE) { 4498 ata_for_each_dev(dev, link, ENABLED) { 4499 struct scsi_device *sdev; 4500 int channel = 0, id = 0; 4501 4502 if (dev->sdev) 4503 continue; 4504 4505 if (ata_is_host_link(link)) 4506 id = dev->devno; 4507 else 4508 channel = link->pmp; 4509 4510 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4511 NULL); 4512 if (!IS_ERR(sdev)) { 4513 dev->sdev = sdev; 4514 ata_scsi_assign_ofnode(dev, ap); 4515 scsi_device_put(sdev); 4516 } else { 4517 dev->sdev = NULL; 4518 } 4519 } 4520 } 4521 4522 /* If we scanned while EH was in progress or allocation 4523 * failure occurred, scan would have failed silently. Check 4524 * whether all devices are attached. 4525 */ 4526 ata_for_each_link(link, ap, EDGE) { 4527 ata_for_each_dev(dev, link, ENABLED) { 4528 if (!dev->sdev) 4529 goto exit_loop; 4530 } 4531 } 4532 exit_loop: 4533 if (!link) 4534 return; 4535 4536 /* we're missing some SCSI devices */ 4537 if (sync) { 4538 /* If caller requested synchrnous scan && we've made 4539 * any progress, sleep briefly and repeat. 4540 */ 4541 if (dev != last_failed_dev) { 4542 msleep(100); 4543 last_failed_dev = dev; 4544 goto repeat; 4545 } 4546 4547 /* We might be failing to detect boot device, give it 4548 * a few more chances. 4549 */ 4550 if (--tries) { 4551 msleep(100); 4552 goto repeat; 4553 } 4554 4555 ata_port_err(ap, 4556 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4557 } 4558 4559 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4560 round_jiffies_relative(HZ)); 4561 } 4562 4563 /** 4564 * ata_scsi_offline_dev - offline attached SCSI device 4565 * @dev: ATA device to offline attached SCSI device for 4566 * 4567 * This function is called from ata_eh_hotplug() and responsible 4568 * for taking the SCSI device attached to @dev offline. This 4569 * function is called with host lock which protects dev->sdev 4570 * against clearing. 4571 * 4572 * LOCKING: 4573 * spin_lock_irqsave(host lock) 4574 * 4575 * RETURNS: 4576 * 1 if attached SCSI device exists, 0 otherwise. 4577 */ 4578 int ata_scsi_offline_dev(struct ata_device *dev) 4579 { 4580 if (dev->sdev) { 4581 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4582 return 1; 4583 } 4584 return 0; 4585 } 4586 4587 /** 4588 * ata_scsi_remove_dev - remove attached SCSI device 4589 * @dev: ATA device to remove attached SCSI device for 4590 * 4591 * This function is called from ata_eh_scsi_hotplug() and 4592 * responsible for removing the SCSI device attached to @dev. 4593 * 4594 * LOCKING: 4595 * Kernel thread context (may sleep). 4596 */ 4597 static void ata_scsi_remove_dev(struct ata_device *dev) 4598 { 4599 struct ata_port *ap = dev->link->ap; 4600 struct scsi_device *sdev; 4601 unsigned long flags; 4602 4603 /* Alas, we need to grab scan_mutex to ensure SCSI device 4604 * state doesn't change underneath us and thus 4605 * scsi_device_get() always succeeds. The mutex locking can 4606 * be removed if there is __scsi_device_get() interface which 4607 * increments reference counts regardless of device state. 4608 */ 4609 mutex_lock(&ap->scsi_host->scan_mutex); 4610 spin_lock_irqsave(ap->lock, flags); 4611 4612 /* clearing dev->sdev is protected by host lock */ 4613 sdev = dev->sdev; 4614 dev->sdev = NULL; 4615 4616 if (sdev) { 4617 /* If user initiated unplug races with us, sdev can go 4618 * away underneath us after the host lock and 4619 * scan_mutex are released. Hold onto it. 4620 */ 4621 if (scsi_device_get(sdev) == 0) { 4622 /* The following ensures the attached sdev is 4623 * offline on return from ata_scsi_offline_dev() 4624 * regardless it wins or loses the race 4625 * against this function. 4626 */ 4627 scsi_device_set_state(sdev, SDEV_OFFLINE); 4628 } else { 4629 WARN_ON(1); 4630 sdev = NULL; 4631 } 4632 } 4633 4634 spin_unlock_irqrestore(ap->lock, flags); 4635 mutex_unlock(&ap->scsi_host->scan_mutex); 4636 4637 if (sdev) { 4638 ata_dev_info(dev, "detaching (SCSI %s)\n", 4639 dev_name(&sdev->sdev_gendev)); 4640 4641 scsi_remove_device(sdev); 4642 scsi_device_put(sdev); 4643 } 4644 } 4645 4646 static void ata_scsi_handle_link_detach(struct ata_link *link) 4647 { 4648 struct ata_port *ap = link->ap; 4649 struct ata_device *dev; 4650 4651 ata_for_each_dev(dev, link, ALL) { 4652 unsigned long flags; 4653 4654 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4655 continue; 4656 4657 spin_lock_irqsave(ap->lock, flags); 4658 dev->flags &= ~ATA_DFLAG_DETACHED; 4659 spin_unlock_irqrestore(ap->lock, flags); 4660 4661 if (zpodd_dev_enabled(dev)) 4662 zpodd_exit(dev); 4663 4664 ata_scsi_remove_dev(dev); 4665 } 4666 } 4667 4668 /** 4669 * ata_scsi_media_change_notify - send media change event 4670 * @dev: Pointer to the disk device with media change event 4671 * 4672 * Tell the block layer to send a media change notification 4673 * event. 4674 * 4675 * LOCKING: 4676 * spin_lock_irqsave(host lock) 4677 */ 4678 void ata_scsi_media_change_notify(struct ata_device *dev) 4679 { 4680 if (dev->sdev) 4681 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4682 GFP_ATOMIC); 4683 } 4684 4685 /** 4686 * ata_scsi_hotplug - SCSI part of hotplug 4687 * @work: Pointer to ATA port to perform SCSI hotplug on 4688 * 4689 * Perform SCSI part of hotplug. It's executed from a separate 4690 * workqueue after EH completes. This is necessary because SCSI 4691 * hot plugging requires working EH and hot unplugging is 4692 * synchronized with hot plugging with a mutex. 4693 * 4694 * LOCKING: 4695 * Kernel thread context (may sleep). 4696 */ 4697 void ata_scsi_hotplug(struct work_struct *work) 4698 { 4699 struct ata_port *ap = 4700 container_of(work, struct ata_port, hotplug_task.work); 4701 int i; 4702 4703 if (ap->pflags & ATA_PFLAG_UNLOADING) 4704 return; 4705 4706 mutex_lock(&ap->scsi_scan_mutex); 4707 4708 /* Unplug detached devices. We cannot use link iterator here 4709 * because PMP links have to be scanned even if PMP is 4710 * currently not attached. Iterate manually. 4711 */ 4712 ata_scsi_handle_link_detach(&ap->link); 4713 if (ap->pmp_link) 4714 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4715 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4716 4717 /* scan for new ones */ 4718 ata_scsi_scan_host(ap, 0); 4719 4720 mutex_unlock(&ap->scsi_scan_mutex); 4721 } 4722 4723 /** 4724 * ata_scsi_user_scan - indication for user-initiated bus scan 4725 * @shost: SCSI host to scan 4726 * @channel: Channel to scan 4727 * @id: ID to scan 4728 * @lun: LUN to scan 4729 * 4730 * This function is called when user explicitly requests bus 4731 * scan. Set probe pending flag and invoke EH. 4732 * 4733 * LOCKING: 4734 * SCSI layer (we don't care) 4735 * 4736 * RETURNS: 4737 * Zero. 4738 */ 4739 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4740 unsigned int id, u64 lun) 4741 { 4742 struct ata_port *ap = ata_shost_to_port(shost); 4743 unsigned long flags; 4744 int devno, rc = 0; 4745 4746 if (lun != SCAN_WILD_CARD && lun) 4747 return -EINVAL; 4748 4749 if (!sata_pmp_attached(ap)) { 4750 if (channel != SCAN_WILD_CARD && channel) 4751 return -EINVAL; 4752 devno = id; 4753 } else { 4754 if (id != SCAN_WILD_CARD && id) 4755 return -EINVAL; 4756 devno = channel; 4757 } 4758 4759 spin_lock_irqsave(ap->lock, flags); 4760 4761 if (devno == SCAN_WILD_CARD) { 4762 struct ata_link *link; 4763 4764 ata_for_each_link(link, ap, EDGE) { 4765 struct ata_eh_info *ehi = &link->eh_info; 4766 ehi->probe_mask |= ATA_ALL_DEVICES; 4767 ehi->action |= ATA_EH_RESET; 4768 } 4769 } else { 4770 struct ata_device *dev = ata_find_dev(ap, devno); 4771 4772 if (dev) { 4773 struct ata_eh_info *ehi = &dev->link->eh_info; 4774 ehi->probe_mask |= 1 << dev->devno; 4775 ehi->action |= ATA_EH_RESET; 4776 } else 4777 rc = -EINVAL; 4778 } 4779 4780 if (rc == 0) { 4781 ata_port_schedule_eh(ap); 4782 spin_unlock_irqrestore(ap->lock, flags); 4783 ata_port_wait_eh(ap); 4784 } else 4785 spin_unlock_irqrestore(ap->lock, flags); 4786 4787 return rc; 4788 } 4789 4790 /** 4791 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4792 * @work: Pointer to ATA port to perform scsi_rescan_device() 4793 * 4794 * After ATA pass thru (SAT) commands are executed successfully, 4795 * libata need to propagate the changes to SCSI layer. 4796 * 4797 * LOCKING: 4798 * Kernel thread context (may sleep). 4799 */ 4800 void ata_scsi_dev_rescan(struct work_struct *work) 4801 { 4802 struct ata_port *ap = 4803 container_of(work, struct ata_port, scsi_rescan_task.work); 4804 struct ata_link *link; 4805 struct ata_device *dev; 4806 unsigned long flags; 4807 bool do_resume; 4808 int ret = 0; 4809 4810 mutex_lock(&ap->scsi_scan_mutex); 4811 spin_lock_irqsave(ap->lock, flags); 4812 4813 ata_for_each_link(link, ap, EDGE) { 4814 ata_for_each_dev(dev, link, ENABLED) { 4815 struct scsi_device *sdev = dev->sdev; 4816 4817 /* 4818 * If the port was suspended before this was scheduled, 4819 * bail out. 4820 */ 4821 if (ap->pflags & ATA_PFLAG_SUSPENDED) 4822 goto unlock_ap; 4823 4824 if (!sdev) 4825 continue; 4826 if (scsi_device_get(sdev)) 4827 continue; 4828 4829 do_resume = dev->flags & ATA_DFLAG_RESUMING; 4830 4831 spin_unlock_irqrestore(ap->lock, flags); 4832 if (do_resume) { 4833 ret = scsi_resume_device(sdev); 4834 if (ret == -EWOULDBLOCK) 4835 goto unlock_scan; 4836 dev->flags &= ~ATA_DFLAG_RESUMING; 4837 } 4838 ret = scsi_rescan_device(sdev); 4839 scsi_device_put(sdev); 4840 spin_lock_irqsave(ap->lock, flags); 4841 4842 if (ret) 4843 goto unlock_ap; 4844 } 4845 } 4846 4847 unlock_ap: 4848 spin_unlock_irqrestore(ap->lock, flags); 4849 unlock_scan: 4850 mutex_unlock(&ap->scsi_scan_mutex); 4851 4852 /* Reschedule with a delay if scsi_rescan_device() returned an error */ 4853 if (ret) 4854 schedule_delayed_work(&ap->scsi_rescan_task, 4855 msecs_to_jiffies(5)); 4856 } 4857