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 576 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 59 60 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 61 RW_RECOVERY_MPAGE, 62 RW_RECOVERY_MPAGE_LEN - 2, 63 (1 << 7), /* AWRE */ 64 0, /* read retry count */ 65 0, 0, 0, 0, 66 0, /* write retry count */ 67 0, 0, 0 68 }; 69 70 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 71 CACHE_MPAGE, 72 CACHE_MPAGE_LEN - 2, 73 0, /* contains WCE, needs to be 0 for logic */ 74 0, 0, 0, 0, 0, 0, 0, 0, 0, 75 0, /* contains DRA, needs to be 0 for logic */ 76 0, 0, 0, 0, 0, 0, 0 77 }; 78 79 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 80 CONTROL_MPAGE, 81 CONTROL_MPAGE_LEN - 2, 82 2, /* DSENSE=0, GLTSD=1 */ 83 0, /* [QAM+QERR may be 1, see 05-359r1] */ 84 0, 0, 0, 0, 0xff, 0xff, 85 0, 30 /* extended self test time, see 05-359r1 */ 86 }; 87 88 static ssize_t ata_scsi_park_show(struct device *device, 89 struct device_attribute *attr, char *buf) 90 { 91 struct scsi_device *sdev = to_scsi_device(device); 92 struct ata_port *ap; 93 struct ata_link *link; 94 struct ata_device *dev; 95 unsigned long now; 96 unsigned int msecs; 97 int rc = 0; 98 99 ap = ata_shost_to_port(sdev->host); 100 101 spin_lock_irq(ap->lock); 102 dev = ata_scsi_find_dev(ap, sdev); 103 if (!dev) { 104 rc = -ENODEV; 105 goto unlock; 106 } 107 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 108 rc = -EOPNOTSUPP; 109 goto unlock; 110 } 111 112 link = dev->link; 113 now = jiffies; 114 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 115 link->eh_context.unloaded_mask & (1 << dev->devno) && 116 time_after(dev->unpark_deadline, now)) 117 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 118 else 119 msecs = 0; 120 121 unlock: 122 spin_unlock_irq(ap->lock); 123 124 return rc ? rc : snprintf(buf, 20, "%u\n", msecs); 125 } 126 127 static ssize_t ata_scsi_park_store(struct device *device, 128 struct device_attribute *attr, 129 const char *buf, size_t len) 130 { 131 struct scsi_device *sdev = to_scsi_device(device); 132 struct ata_port *ap; 133 struct ata_device *dev; 134 long int input; 135 unsigned long flags; 136 int rc; 137 138 rc = kstrtol(buf, 10, &input); 139 if (rc) 140 return rc; 141 if (input < -2) 142 return -EINVAL; 143 if (input > ATA_TMOUT_MAX_PARK) { 144 rc = -EOVERFLOW; 145 input = ATA_TMOUT_MAX_PARK; 146 } 147 148 ap = ata_shost_to_port(sdev->host); 149 150 spin_lock_irqsave(ap->lock, flags); 151 dev = ata_scsi_find_dev(ap, sdev); 152 if (unlikely(!dev)) { 153 rc = -ENODEV; 154 goto unlock; 155 } 156 if (dev->class != ATA_DEV_ATA && 157 dev->class != ATA_DEV_ZAC) { 158 rc = -EOPNOTSUPP; 159 goto unlock; 160 } 161 162 if (input >= 0) { 163 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 164 rc = -EOPNOTSUPP; 165 goto unlock; 166 } 167 168 dev->unpark_deadline = ata_deadline(jiffies, input); 169 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 170 ata_port_schedule_eh(ap); 171 complete(&ap->park_req_pending); 172 } else { 173 switch (input) { 174 case -1: 175 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 176 break; 177 case -2: 178 dev->flags |= ATA_DFLAG_NO_UNLOAD; 179 break; 180 } 181 } 182 unlock: 183 spin_unlock_irqrestore(ap->lock, flags); 184 185 return rc ? rc : len; 186 } 187 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 188 ata_scsi_park_show, ata_scsi_park_store); 189 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 190 191 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 192 u8 sk, u8 asc, u8 ascq) 193 { 194 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 195 196 if (!cmd) 197 return; 198 199 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 200 201 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq); 202 } 203 204 void ata_scsi_set_sense_information(struct ata_device *dev, 205 struct scsi_cmnd *cmd, 206 const struct ata_taskfile *tf) 207 { 208 u64 information; 209 210 if (!cmd) 211 return; 212 213 information = ata_tf_read_block(tf, dev); 214 if (information == U64_MAX) 215 return; 216 217 scsi_set_sense_information(cmd->sense_buffer, 218 SCSI_SENSE_BUFFERSIZE, information); 219 } 220 221 static void ata_scsi_set_invalid_field(struct ata_device *dev, 222 struct scsi_cmnd *cmd, u16 field, u8 bit) 223 { 224 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 225 /* "Invalid field in CDB" */ 226 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 227 field, bit, 1); 228 } 229 230 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 231 struct scsi_cmnd *cmd, u16 field) 232 { 233 /* "Invalid field in parameter list" */ 234 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 235 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 236 field, 0xff, 0); 237 } 238 239 struct device_attribute *ata_common_sdev_attrs[] = { 240 &dev_attr_unload_heads, 241 NULL 242 }; 243 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); 244 245 /** 246 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 247 * @sdev: SCSI device for which BIOS geometry is to be determined 248 * @bdev: block device associated with @sdev 249 * @capacity: capacity of SCSI device 250 * @geom: location to which geometry will be output 251 * 252 * Generic bios head/sector/cylinder calculator 253 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 254 * mapping. Some situations may arise where the disk is not 255 * bootable if this is not used. 256 * 257 * LOCKING: 258 * Defined by the SCSI layer. We don't really care. 259 * 260 * RETURNS: 261 * Zero. 262 */ 263 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 264 sector_t capacity, int geom[]) 265 { 266 geom[0] = 255; 267 geom[1] = 63; 268 sector_div(capacity, 255*63); 269 geom[2] = capacity; 270 271 return 0; 272 } 273 EXPORT_SYMBOL_GPL(ata_std_bios_param); 274 275 /** 276 * ata_scsi_unlock_native_capacity - unlock native capacity 277 * @sdev: SCSI device to adjust device capacity for 278 * 279 * This function is called if a partition on @sdev extends beyond 280 * the end of the device. It requests EH to unlock HPA. 281 * 282 * LOCKING: 283 * Defined by the SCSI layer. Might sleep. 284 */ 285 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 286 { 287 struct ata_port *ap = ata_shost_to_port(sdev->host); 288 struct ata_device *dev; 289 unsigned long flags; 290 291 spin_lock_irqsave(ap->lock, flags); 292 293 dev = ata_scsi_find_dev(ap, sdev); 294 if (dev && dev->n_sectors < dev->n_native_sectors) { 295 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 296 dev->link->eh_info.action |= ATA_EH_RESET; 297 ata_port_schedule_eh(ap); 298 } 299 300 spin_unlock_irqrestore(ap->lock, flags); 301 ata_port_wait_eh(ap); 302 } 303 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 304 305 /** 306 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 307 * @ap: target port 308 * @sdev: SCSI device to get identify data for 309 * @arg: User buffer area for identify data 310 * 311 * LOCKING: 312 * Defined by the SCSI layer. We don't really care. 313 * 314 * RETURNS: 315 * Zero on success, negative errno on error. 316 */ 317 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 318 void __user *arg) 319 { 320 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 321 u16 __user *dst = arg; 322 char buf[40]; 323 324 if (!dev) 325 return -ENOMSG; 326 327 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 328 return -EFAULT; 329 330 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 331 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 332 return -EFAULT; 333 334 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 335 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 336 return -EFAULT; 337 338 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 339 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 340 return -EFAULT; 341 342 return 0; 343 } 344 345 /** 346 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 347 * @scsidev: Device to which we are issuing command 348 * @arg: User provided data for issuing command 349 * 350 * LOCKING: 351 * Defined by the SCSI layer. We don't really care. 352 * 353 * RETURNS: 354 * Zero on success, negative errno on error. 355 */ 356 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 357 { 358 int rc = 0; 359 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 360 u8 scsi_cmd[MAX_COMMAND_SIZE]; 361 u8 args[4], *argbuf = NULL; 362 int argsize = 0; 363 enum dma_data_direction data_dir; 364 struct scsi_sense_hdr sshdr; 365 int cmd_result; 366 367 if (arg == NULL) 368 return -EINVAL; 369 370 if (copy_from_user(args, arg, sizeof(args))) 371 return -EFAULT; 372 373 memset(sensebuf, 0, sizeof(sensebuf)); 374 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 375 376 if (args[3]) { 377 argsize = ATA_SECT_SIZE * args[3]; 378 argbuf = kmalloc(argsize, GFP_KERNEL); 379 if (argbuf == NULL) { 380 rc = -ENOMEM; 381 goto error; 382 } 383 384 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 385 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 386 block count in sector count field */ 387 data_dir = DMA_FROM_DEVICE; 388 } else { 389 scsi_cmd[1] = (3 << 1); /* Non-data */ 390 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 391 data_dir = DMA_NONE; 392 } 393 394 scsi_cmd[0] = ATA_16; 395 396 scsi_cmd[4] = args[2]; 397 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 398 scsi_cmd[6] = args[3]; 399 scsi_cmd[8] = args[1]; 400 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 401 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 402 } else { 403 scsi_cmd[6] = args[1]; 404 } 405 scsi_cmd[14] = args[0]; 406 407 /* Good values for timeout and retries? Values below 408 from scsi_ioctl_send_command() for default case... */ 409 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 410 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 411 412 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 413 u8 *desc = sensebuf + 8; 414 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 415 416 /* If we set cc then ATA pass-through will cause a 417 * check condition even if no error. Filter that. */ 418 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 419 if (sshdr.sense_key == RECOVERED_ERROR && 420 sshdr.asc == 0 && sshdr.ascq == 0x1d) 421 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 422 } 423 424 /* Send userspace a few ATA registers (same as drivers/ide) */ 425 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 426 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 427 args[0] = desc[13]; /* status */ 428 args[1] = desc[3]; /* error */ 429 args[2] = desc[5]; /* sector count (0:7) */ 430 if (copy_to_user(arg, args, sizeof(args))) 431 rc = -EFAULT; 432 } 433 } 434 435 436 if (cmd_result) { 437 rc = -EIO; 438 goto error; 439 } 440 441 if ((argbuf) 442 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 443 rc = -EFAULT; 444 error: 445 kfree(argbuf); 446 return rc; 447 } 448 449 /** 450 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 451 * @scsidev: Device to which we are issuing command 452 * @arg: User provided data for issuing command 453 * 454 * LOCKING: 455 * Defined by the SCSI layer. We don't really care. 456 * 457 * RETURNS: 458 * Zero on success, negative errno on error. 459 */ 460 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 461 { 462 int rc = 0; 463 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 464 u8 scsi_cmd[MAX_COMMAND_SIZE]; 465 u8 args[7]; 466 struct scsi_sense_hdr sshdr; 467 int cmd_result; 468 469 if (arg == NULL) 470 return -EINVAL; 471 472 if (copy_from_user(args, arg, sizeof(args))) 473 return -EFAULT; 474 475 memset(sensebuf, 0, sizeof(sensebuf)); 476 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 477 scsi_cmd[0] = ATA_16; 478 scsi_cmd[1] = (3 << 1); /* Non-data */ 479 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 480 scsi_cmd[4] = args[1]; 481 scsi_cmd[6] = args[2]; 482 scsi_cmd[8] = args[3]; 483 scsi_cmd[10] = args[4]; 484 scsi_cmd[12] = args[5]; 485 scsi_cmd[13] = args[6] & 0x4f; 486 scsi_cmd[14] = args[0]; 487 488 /* Good values for timeout and retries? Values below 489 from scsi_ioctl_send_command() for default case... */ 490 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 491 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 492 493 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 494 u8 *desc = sensebuf + 8; 495 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 496 497 /* If we set cc then ATA pass-through will cause a 498 * check condition even if no error. Filter that. */ 499 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 500 if (sshdr.sense_key == RECOVERED_ERROR && 501 sshdr.asc == 0 && sshdr.ascq == 0x1d) 502 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 503 } 504 505 /* Send userspace ATA registers */ 506 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 507 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 508 args[0] = desc[13]; /* status */ 509 args[1] = desc[3]; /* error */ 510 args[2] = desc[5]; /* sector count (0:7) */ 511 args[3] = desc[7]; /* lbal */ 512 args[4] = desc[9]; /* lbam */ 513 args[5] = desc[11]; /* lbah */ 514 args[6] = desc[12]; /* select */ 515 if (copy_to_user(arg, args, sizeof(args))) 516 rc = -EFAULT; 517 } 518 } 519 520 if (cmd_result) { 521 rc = -EIO; 522 goto error; 523 } 524 525 error: 526 return rc; 527 } 528 529 static int ata_ioc32(struct ata_port *ap) 530 { 531 if (ap->flags & ATA_FLAG_PIO_DMA) 532 return 1; 533 if (ap->pflags & ATA_PFLAG_PIO32) 534 return 1; 535 return 0; 536 } 537 538 /* 539 * This handles both native and compat commands, so anything added 540 * here must have a compatible argument, or check in_compat_syscall() 541 */ 542 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 543 unsigned int cmd, void __user *arg) 544 { 545 unsigned long val; 546 int rc = -EINVAL; 547 unsigned long flags; 548 549 switch (cmd) { 550 case HDIO_GET_32BIT: 551 spin_lock_irqsave(ap->lock, flags); 552 val = ata_ioc32(ap); 553 spin_unlock_irqrestore(ap->lock, flags); 554 #ifdef CONFIG_COMPAT 555 if (in_compat_syscall()) 556 return put_user(val, (compat_ulong_t __user *)arg); 557 #endif 558 return put_user(val, (unsigned long __user *)arg); 559 560 case HDIO_SET_32BIT: 561 val = (unsigned long) arg; 562 rc = 0; 563 spin_lock_irqsave(ap->lock, flags); 564 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 565 if (val) 566 ap->pflags |= ATA_PFLAG_PIO32; 567 else 568 ap->pflags &= ~ATA_PFLAG_PIO32; 569 } else { 570 if (val != ata_ioc32(ap)) 571 rc = -EINVAL; 572 } 573 spin_unlock_irqrestore(ap->lock, flags); 574 return rc; 575 576 case HDIO_GET_IDENTITY: 577 return ata_get_identity(ap, scsidev, arg); 578 579 case HDIO_DRIVE_CMD: 580 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 581 return -EACCES; 582 return ata_cmd_ioctl(scsidev, arg); 583 584 case HDIO_DRIVE_TASK: 585 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 586 return -EACCES; 587 return ata_task_ioctl(scsidev, arg); 588 589 default: 590 rc = -ENOTTY; 591 break; 592 } 593 594 return rc; 595 } 596 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 597 598 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 599 void __user *arg) 600 { 601 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 602 scsidev, cmd, arg); 603 } 604 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 605 606 /** 607 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 608 * @dev: ATA device to which the new command is attached 609 * @cmd: SCSI command that originated this ATA command 610 * 611 * Obtain a reference to an unused ata_queued_cmd structure, 612 * which is the basic libata structure representing a single 613 * ATA command sent to the hardware. 614 * 615 * If a command was available, fill in the SCSI-specific 616 * portions of the structure with information on the 617 * current command. 618 * 619 * LOCKING: 620 * spin_lock_irqsave(host lock) 621 * 622 * RETURNS: 623 * Command allocated, or %NULL if none available. 624 */ 625 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 626 struct scsi_cmnd *cmd) 627 { 628 struct ata_queued_cmd *qc; 629 630 qc = ata_qc_new_init(dev, cmd->request->tag); 631 if (qc) { 632 qc->scsicmd = cmd; 633 qc->scsidone = cmd->scsi_done; 634 635 qc->sg = scsi_sglist(cmd); 636 qc->n_elem = scsi_sg_count(cmd); 637 638 if (cmd->request->rq_flags & RQF_QUIET) 639 qc->flags |= ATA_QCFLAG_QUIET; 640 } else { 641 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 642 cmd->scsi_done(cmd); 643 } 644 645 return qc; 646 } 647 648 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 649 { 650 struct scsi_cmnd *scmd = qc->scsicmd; 651 652 qc->extrabytes = scmd->extra_len; 653 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 654 } 655 656 /** 657 * ata_dump_status - user friendly display of error info 658 * @id: id of the port in question 659 * @tf: ptr to filled out taskfile 660 * 661 * Decode and dump the ATA error/status registers for the user so 662 * that they have some idea what really happened at the non 663 * make-believe layer. 664 * 665 * LOCKING: 666 * inherited from caller 667 */ 668 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 669 { 670 u8 stat = tf->command, err = tf->feature; 671 672 pr_warn("ata%u: status=0x%02x { ", id, stat); 673 if (stat & ATA_BUSY) { 674 pr_cont("Busy }\n"); /* Data is not valid in this case */ 675 } else { 676 if (stat & ATA_DRDY) pr_cont("DriveReady "); 677 if (stat & ATA_DF) pr_cont("DeviceFault "); 678 if (stat & ATA_DSC) pr_cont("SeekComplete "); 679 if (stat & ATA_DRQ) pr_cont("DataRequest "); 680 if (stat & ATA_CORR) pr_cont("CorrectedError "); 681 if (stat & ATA_SENSE) pr_cont("Sense "); 682 if (stat & ATA_ERR) pr_cont("Error "); 683 pr_cont("}\n"); 684 685 if (err) { 686 pr_warn("ata%u: error=0x%02x { ", id, err); 687 if (err & ATA_ABORTED) pr_cont("DriveStatusError "); 688 if (err & ATA_ICRC) { 689 if (err & ATA_ABORTED) 690 pr_cont("BadCRC "); 691 else pr_cont("Sector "); 692 } 693 if (err & ATA_UNC) pr_cont("UncorrectableError "); 694 if (err & ATA_IDNF) pr_cont("SectorIdNotFound "); 695 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound "); 696 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound "); 697 pr_cont("}\n"); 698 } 699 } 700 } 701 702 /** 703 * ata_to_sense_error - convert ATA error to SCSI error 704 * @id: ATA device number 705 * @drv_stat: value contained in ATA status register 706 * @drv_err: value contained in ATA error register 707 * @sk: the sense key we'll fill out 708 * @asc: the additional sense code we'll fill out 709 * @ascq: the additional sense code qualifier we'll fill out 710 * @verbose: be verbose 711 * 712 * Converts an ATA error into a SCSI error. Fill out pointers to 713 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 714 * format sense blocks. 715 * 716 * LOCKING: 717 * spin_lock_irqsave(host lock) 718 */ 719 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 720 u8 *asc, u8 *ascq, int verbose) 721 { 722 int i; 723 724 /* Based on the 3ware driver translation table */ 725 static const unsigned char sense_table[][4] = { 726 /* BBD|ECC|ID|MAR */ 727 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 728 // Device busy Aborted command 729 /* BBD|ECC|ID */ 730 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 731 // Device busy Aborted command 732 /* ECC|MC|MARK */ 733 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 734 // Device fault Hardware error 735 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 736 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 737 // Data CRC error SCSI parity error 738 /* MC|ID|ABRT|TRK0|MARK */ 739 {0x37, NOT_READY, 0x04, 0x00}, 740 // Unit offline Not ready 741 /* MCR|MARK */ 742 {0x09, NOT_READY, 0x04, 0x00}, 743 // Unrecovered disk error Not ready 744 /* Bad address mark */ 745 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 746 // Address mark not found for data field 747 /* TRK0 - Track 0 not found */ 748 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 749 // Hardware error 750 /* Abort: 0x04 is not translated here, see below */ 751 /* Media change request */ 752 {0x08, NOT_READY, 0x04, 0x00}, 753 // FIXME: faking offline 754 /* SRV/IDNF - ID not found */ 755 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 756 // Logical address out of range 757 /* MC - Media Changed */ 758 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 759 // Not ready to ready change, medium may have changed 760 /* ECC - Uncorrectable ECC error */ 761 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 762 // Unrecovered read error 763 /* BBD - block marked bad */ 764 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 765 // Block marked bad Medium error, unrecovered read error 766 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 767 }; 768 static const unsigned char stat_table[][4] = { 769 /* Must be first because BUSY means no other bits valid */ 770 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 771 // Busy, fake parity for now 772 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 773 // Device ready, unaligned write command 774 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 775 // Device fault, internal target failure 776 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 777 // Timed out in xfer, fake parity for now 778 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 779 // Recovered ECC error Medium error, recovered 780 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 781 }; 782 783 /* 784 * Is this an error we can process/parse 785 */ 786 if (drv_stat & ATA_BUSY) { 787 drv_err = 0; /* Ignore the err bits, they're invalid */ 788 } 789 790 if (drv_err) { 791 /* Look for drv_err */ 792 for (i = 0; sense_table[i][0] != 0xFF; i++) { 793 /* Look for best matches first */ 794 if ((sense_table[i][0] & drv_err) == 795 sense_table[i][0]) { 796 *sk = sense_table[i][1]; 797 *asc = sense_table[i][2]; 798 *ascq = sense_table[i][3]; 799 goto translate_done; 800 } 801 } 802 } 803 804 /* 805 * Fall back to interpreting status bits. Note that if the drv_err 806 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 807 * is not descriptive enough. 808 */ 809 for (i = 0; stat_table[i][0] != 0xFF; i++) { 810 if (stat_table[i][0] & drv_stat) { 811 *sk = stat_table[i][1]; 812 *asc = stat_table[i][2]; 813 *ascq = stat_table[i][3]; 814 goto translate_done; 815 } 816 } 817 818 /* 819 * We need a sensible error return here, which is tricky, and one 820 * that won't cause people to do things like return a disk wrongly. 821 */ 822 *sk = ABORTED_COMMAND; 823 *asc = 0x00; 824 *ascq = 0x00; 825 826 translate_done: 827 if (verbose) 828 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 829 id, drv_stat, drv_err, *sk, *asc, *ascq); 830 return; 831 } 832 833 /* 834 * ata_gen_passthru_sense - Generate check condition sense block. 835 * @qc: Command that completed. 836 * 837 * This function is specific to the ATA descriptor format sense 838 * block specified for the ATA pass through commands. Regardless 839 * of whether the command errored or not, return a sense 840 * block. Copy all controller registers into the sense 841 * block. If there was no error, we get the request from an ATA 842 * passthrough command, so we use the following sense data: 843 * sk = RECOVERED ERROR 844 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 845 * 846 * 847 * LOCKING: 848 * None. 849 */ 850 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 851 { 852 struct scsi_cmnd *cmd = qc->scsicmd; 853 struct ata_taskfile *tf = &qc->result_tf; 854 unsigned char *sb = cmd->sense_buffer; 855 unsigned char *desc = sb + 8; 856 int verbose = qc->ap->ops->error_handler == NULL; 857 u8 sense_key, asc, ascq; 858 859 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 860 861 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 862 863 /* 864 * Use ata_to_sense_error() to map status register bits 865 * onto sense key, asc & ascq. 866 */ 867 if (qc->err_mask || 868 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 869 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 870 &sense_key, &asc, &ascq, verbose); 871 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 872 } else { 873 /* 874 * ATA PASS-THROUGH INFORMATION AVAILABLE 875 * Always in descriptor format sense. 876 */ 877 scsi_build_sense_buffer(1, cmd->sense_buffer, 878 RECOVERED_ERROR, 0, 0x1D); 879 } 880 881 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 882 u8 len; 883 884 /* descriptor format */ 885 len = sb[7]; 886 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 887 if (!desc) { 888 if (SCSI_SENSE_BUFFERSIZE < len + 14) 889 return; 890 sb[7] = len + 14; 891 desc = sb + 8 + len; 892 } 893 desc[0] = 9; 894 desc[1] = 12; 895 /* 896 * Copy registers into sense buffer. 897 */ 898 desc[2] = 0x00; 899 desc[3] = tf->feature; /* == error reg */ 900 desc[5] = tf->nsect; 901 desc[7] = tf->lbal; 902 desc[9] = tf->lbam; 903 desc[11] = tf->lbah; 904 desc[12] = tf->device; 905 desc[13] = tf->command; /* == status reg */ 906 907 /* 908 * Fill in Extend bit, and the high order bytes 909 * if applicable. 910 */ 911 if (tf->flags & ATA_TFLAG_LBA48) { 912 desc[2] |= 0x01; 913 desc[4] = tf->hob_nsect; 914 desc[6] = tf->hob_lbal; 915 desc[8] = tf->hob_lbam; 916 desc[10] = tf->hob_lbah; 917 } 918 } else { 919 /* Fixed sense format */ 920 desc[0] = tf->feature; 921 desc[1] = tf->command; /* status */ 922 desc[2] = tf->device; 923 desc[3] = tf->nsect; 924 desc[7] = 0; 925 if (tf->flags & ATA_TFLAG_LBA48) { 926 desc[8] |= 0x80; 927 if (tf->hob_nsect) 928 desc[8] |= 0x40; 929 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 930 desc[8] |= 0x20; 931 } 932 desc[9] = tf->lbal; 933 desc[10] = tf->lbam; 934 desc[11] = tf->lbah; 935 } 936 } 937 938 /** 939 * ata_gen_ata_sense - generate a SCSI fixed sense block 940 * @qc: Command that we are erroring out 941 * 942 * Generate sense block for a failed ATA command @qc. Descriptor 943 * format is used to accommodate LBA48 block address. 944 * 945 * LOCKING: 946 * None. 947 */ 948 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 949 { 950 struct ata_device *dev = qc->dev; 951 struct scsi_cmnd *cmd = qc->scsicmd; 952 struct ata_taskfile *tf = &qc->result_tf; 953 unsigned char *sb = cmd->sense_buffer; 954 int verbose = qc->ap->ops->error_handler == NULL; 955 u64 block; 956 u8 sense_key, asc, ascq; 957 958 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 959 960 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 961 962 if (ata_dev_disabled(dev)) { 963 /* Device disabled after error recovery */ 964 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 965 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 966 return; 967 } 968 /* Use ata_to_sense_error() to map status register bits 969 * onto sense key, asc & ascq. 970 */ 971 if (qc->err_mask || 972 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 973 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 974 &sense_key, &asc, &ascq, verbose); 975 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 976 } else { 977 /* Could not decode error */ 978 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 979 tf->command, qc->err_mask); 980 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 981 return; 982 } 983 984 block = ata_tf_read_block(&qc->result_tf, dev); 985 if (block == U64_MAX) 986 return; 987 988 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 989 } 990 991 void ata_scsi_sdev_config(struct scsi_device *sdev) 992 { 993 sdev->use_10_for_rw = 1; 994 sdev->use_10_for_ms = 1; 995 sdev->no_write_same = 1; 996 997 /* Schedule policy is determined by ->qc_defer() callback and 998 * it needs to see every deferred qc. Set dev_blocked to 1 to 999 * prevent SCSI midlayer from automatically deferring 1000 * requests. 1001 */ 1002 sdev->max_device_blocked = 1; 1003 } 1004 1005 /** 1006 * atapi_drain_needed - Check whether data transfer may overflow 1007 * @rq: request to be checked 1008 * 1009 * ATAPI commands which transfer variable length data to host 1010 * might overflow due to application error or hardware bug. This 1011 * function checks whether overflow should be drained and ignored 1012 * for @request. 1013 * 1014 * LOCKING: 1015 * None. 1016 * 1017 * RETURNS: 1018 * 1 if ; otherwise, 0. 1019 */ 1020 bool ata_scsi_dma_need_drain(struct request *rq) 1021 { 1022 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; 1023 } 1024 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1025 1026 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1027 { 1028 struct request_queue *q = sdev->request_queue; 1029 1030 if (!ata_id_has_unload(dev->id)) 1031 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1032 1033 /* configure max sectors */ 1034 blk_queue_max_hw_sectors(q, dev->max_sectors); 1035 1036 if (dev->class == ATA_DEV_ATAPI) { 1037 sdev->sector_size = ATA_SECT_SIZE; 1038 1039 /* set DMA padding */ 1040 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1041 1042 /* make room for appending the drain */ 1043 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1044 1045 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1046 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, 1047 q->bounce_gfp | GFP_KERNEL); 1048 if (!sdev->dma_drain_buf) { 1049 ata_dev_err(dev, "drain buffer allocation failed\n"); 1050 return -ENOMEM; 1051 } 1052 } else { 1053 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1054 sdev->manage_start_stop = 1; 1055 } 1056 1057 /* 1058 * ata_pio_sectors() expects buffer for each sector to not cross 1059 * page boundary. Enforce it by requiring buffers to be sector 1060 * aligned, which works iff sector_size is not larger than 1061 * PAGE_SIZE. ATAPI devices also need the alignment as 1062 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1063 */ 1064 if (sdev->sector_size > PAGE_SIZE) 1065 ata_dev_warn(dev, 1066 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1067 sdev->sector_size); 1068 1069 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1070 1071 if (dev->flags & ATA_DFLAG_AN) 1072 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1073 1074 if (dev->flags & ATA_DFLAG_NCQ) { 1075 int depth; 1076 1077 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1078 depth = min(ATA_MAX_QUEUE, depth); 1079 scsi_change_queue_depth(sdev, depth); 1080 } 1081 1082 if (dev->flags & ATA_DFLAG_TRUSTED) 1083 sdev->security_supported = 1; 1084 1085 dev->sdev = sdev; 1086 return 0; 1087 } 1088 1089 /** 1090 * ata_scsi_slave_config - Set SCSI device attributes 1091 * @sdev: SCSI device to examine 1092 * 1093 * This is called before we actually start reading 1094 * and writing to the device, to configure certain 1095 * SCSI mid-layer behaviors. 1096 * 1097 * LOCKING: 1098 * Defined by SCSI layer. We don't really care. 1099 */ 1100 1101 int ata_scsi_slave_config(struct scsi_device *sdev) 1102 { 1103 struct ata_port *ap = ata_shost_to_port(sdev->host); 1104 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1105 int rc = 0; 1106 1107 ata_scsi_sdev_config(sdev); 1108 1109 if (dev) 1110 rc = ata_scsi_dev_config(sdev, dev); 1111 1112 return rc; 1113 } 1114 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1115 1116 /** 1117 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1118 * @sdev: SCSI device to be destroyed 1119 * 1120 * @sdev is about to be destroyed for hot/warm unplugging. If 1121 * this unplugging was initiated by libata as indicated by NULL 1122 * dev->sdev, this function doesn't have to do anything. 1123 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1124 * Clear dev->sdev, schedule the device for ATA detach and invoke 1125 * EH. 1126 * 1127 * LOCKING: 1128 * Defined by SCSI layer. We don't really care. 1129 */ 1130 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1131 { 1132 struct ata_port *ap = ata_shost_to_port(sdev->host); 1133 unsigned long flags; 1134 struct ata_device *dev; 1135 1136 if (!ap->ops->error_handler) 1137 return; 1138 1139 spin_lock_irqsave(ap->lock, flags); 1140 dev = __ata_scsi_find_dev(ap, sdev); 1141 if (dev && dev->sdev) { 1142 /* SCSI device already in CANCEL state, no need to offline it */ 1143 dev->sdev = NULL; 1144 dev->flags |= ATA_DFLAG_DETACH; 1145 ata_port_schedule_eh(ap); 1146 } 1147 spin_unlock_irqrestore(ap->lock, flags); 1148 1149 kfree(sdev->dma_drain_buf); 1150 } 1151 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1152 1153 /** 1154 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1155 * @qc: Storage for translated ATA taskfile 1156 * 1157 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1158 * (to start). Perhaps these commands should be preceded by 1159 * CHECK POWER MODE to see what power mode the device is already in. 1160 * [See SAT revision 5 at www.t10.org] 1161 * 1162 * LOCKING: 1163 * spin_lock_irqsave(host lock) 1164 * 1165 * RETURNS: 1166 * Zero on success, non-zero on error. 1167 */ 1168 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1169 { 1170 struct scsi_cmnd *scmd = qc->scsicmd; 1171 struct ata_taskfile *tf = &qc->tf; 1172 const u8 *cdb = scmd->cmnd; 1173 u16 fp; 1174 u8 bp = 0xff; 1175 1176 if (scmd->cmd_len < 5) { 1177 fp = 4; 1178 goto invalid_fld; 1179 } 1180 1181 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1182 tf->protocol = ATA_PROT_NODATA; 1183 if (cdb[1] & 0x1) { 1184 ; /* ignore IMMED bit, violates sat-r05 */ 1185 } 1186 if (cdb[4] & 0x2) { 1187 fp = 4; 1188 bp = 1; 1189 goto invalid_fld; /* LOEJ bit set not supported */ 1190 } 1191 if (((cdb[4] >> 4) & 0xf) != 0) { 1192 fp = 4; 1193 bp = 3; 1194 goto invalid_fld; /* power conditions not supported */ 1195 } 1196 1197 if (cdb[4] & 0x1) { 1198 tf->nsect = 1; /* 1 sector, lba=0 */ 1199 1200 if (qc->dev->flags & ATA_DFLAG_LBA) { 1201 tf->flags |= ATA_TFLAG_LBA; 1202 1203 tf->lbah = 0x0; 1204 tf->lbam = 0x0; 1205 tf->lbal = 0x0; 1206 tf->device |= ATA_LBA; 1207 } else { 1208 /* CHS */ 1209 tf->lbal = 0x1; /* sect */ 1210 tf->lbam = 0x0; /* cyl low */ 1211 tf->lbah = 0x0; /* cyl high */ 1212 } 1213 1214 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1215 } else { 1216 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1217 * or S5) causing some drives to spin up and down again. 1218 */ 1219 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1220 system_state == SYSTEM_POWER_OFF) 1221 goto skip; 1222 1223 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1224 system_entering_hibernation()) 1225 goto skip; 1226 1227 /* Issue ATA STANDBY IMMEDIATE command */ 1228 tf->command = ATA_CMD_STANDBYNOW1; 1229 } 1230 1231 /* 1232 * Standby and Idle condition timers could be implemented but that 1233 * would require libata to implement the Power condition mode page 1234 * and allow the user to change it. Changing mode pages requires 1235 * MODE SELECT to be implemented. 1236 */ 1237 1238 return 0; 1239 1240 invalid_fld: 1241 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1242 return 1; 1243 skip: 1244 scmd->result = SAM_STAT_GOOD; 1245 return 1; 1246 } 1247 1248 1249 /** 1250 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1251 * @qc: Storage for translated ATA taskfile 1252 * 1253 * Sets up an ATA taskfile to issue FLUSH CACHE or 1254 * FLUSH CACHE EXT. 1255 * 1256 * LOCKING: 1257 * spin_lock_irqsave(host lock) 1258 * 1259 * RETURNS: 1260 * Zero on success, non-zero on error. 1261 */ 1262 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1263 { 1264 struct ata_taskfile *tf = &qc->tf; 1265 1266 tf->flags |= ATA_TFLAG_DEVICE; 1267 tf->protocol = ATA_PROT_NODATA; 1268 1269 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1270 tf->command = ATA_CMD_FLUSH_EXT; 1271 else 1272 tf->command = ATA_CMD_FLUSH; 1273 1274 /* flush is critical for IO integrity, consider it an IO command */ 1275 qc->flags |= ATA_QCFLAG_IO; 1276 1277 return 0; 1278 } 1279 1280 /** 1281 * scsi_6_lba_len - Get LBA and transfer length 1282 * @cdb: SCSI command to translate 1283 * 1284 * Calculate LBA and transfer length for 6-byte commands. 1285 * 1286 * RETURNS: 1287 * @plba: the LBA 1288 * @plen: the transfer length 1289 */ 1290 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1291 { 1292 u64 lba = 0; 1293 u32 len; 1294 1295 VPRINTK("six-byte command\n"); 1296 1297 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1298 lba |= ((u64)cdb[2]) << 8; 1299 lba |= ((u64)cdb[3]); 1300 1301 len = cdb[4]; 1302 1303 *plba = lba; 1304 *plen = len; 1305 } 1306 1307 /** 1308 * scsi_10_lba_len - Get LBA and transfer length 1309 * @cdb: SCSI command to translate 1310 * 1311 * Calculate LBA and transfer length for 10-byte commands. 1312 * 1313 * RETURNS: 1314 * @plba: the LBA 1315 * @plen: the transfer length 1316 */ 1317 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1318 { 1319 u64 lba = 0; 1320 u32 len = 0; 1321 1322 VPRINTK("ten-byte command\n"); 1323 1324 lba |= ((u64)cdb[2]) << 24; 1325 lba |= ((u64)cdb[3]) << 16; 1326 lba |= ((u64)cdb[4]) << 8; 1327 lba |= ((u64)cdb[5]); 1328 1329 len |= ((u32)cdb[7]) << 8; 1330 len |= ((u32)cdb[8]); 1331 1332 *plba = lba; 1333 *plen = len; 1334 } 1335 1336 /** 1337 * scsi_16_lba_len - Get LBA and transfer length 1338 * @cdb: SCSI command to translate 1339 * 1340 * Calculate LBA and transfer length for 16-byte commands. 1341 * 1342 * RETURNS: 1343 * @plba: the LBA 1344 * @plen: the transfer length 1345 */ 1346 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1347 { 1348 u64 lba = 0; 1349 u32 len = 0; 1350 1351 VPRINTK("sixteen-byte command\n"); 1352 1353 lba |= ((u64)cdb[2]) << 56; 1354 lba |= ((u64)cdb[3]) << 48; 1355 lba |= ((u64)cdb[4]) << 40; 1356 lba |= ((u64)cdb[5]) << 32; 1357 lba |= ((u64)cdb[6]) << 24; 1358 lba |= ((u64)cdb[7]) << 16; 1359 lba |= ((u64)cdb[8]) << 8; 1360 lba |= ((u64)cdb[9]); 1361 1362 len |= ((u32)cdb[10]) << 24; 1363 len |= ((u32)cdb[11]) << 16; 1364 len |= ((u32)cdb[12]) << 8; 1365 len |= ((u32)cdb[13]); 1366 1367 *plba = lba; 1368 *plen = len; 1369 } 1370 1371 /** 1372 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1373 * @qc: Storage for translated ATA taskfile 1374 * 1375 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1376 * 1377 * LOCKING: 1378 * spin_lock_irqsave(host lock) 1379 * 1380 * RETURNS: 1381 * Zero on success, non-zero on error. 1382 */ 1383 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1384 { 1385 struct scsi_cmnd *scmd = qc->scsicmd; 1386 struct ata_taskfile *tf = &qc->tf; 1387 struct ata_device *dev = qc->dev; 1388 u64 dev_sectors = qc->dev->n_sectors; 1389 const u8 *cdb = scmd->cmnd; 1390 u64 block; 1391 u32 n_block; 1392 u16 fp; 1393 1394 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1395 tf->protocol = ATA_PROT_NODATA; 1396 1397 if (cdb[0] == VERIFY) { 1398 if (scmd->cmd_len < 10) { 1399 fp = 9; 1400 goto invalid_fld; 1401 } 1402 scsi_10_lba_len(cdb, &block, &n_block); 1403 } else if (cdb[0] == VERIFY_16) { 1404 if (scmd->cmd_len < 16) { 1405 fp = 15; 1406 goto invalid_fld; 1407 } 1408 scsi_16_lba_len(cdb, &block, &n_block); 1409 } else { 1410 fp = 0; 1411 goto invalid_fld; 1412 } 1413 1414 if (!n_block) 1415 goto nothing_to_do; 1416 if (block >= dev_sectors) 1417 goto out_of_range; 1418 if ((block + n_block) > dev_sectors) 1419 goto out_of_range; 1420 1421 if (dev->flags & ATA_DFLAG_LBA) { 1422 tf->flags |= ATA_TFLAG_LBA; 1423 1424 if (lba_28_ok(block, n_block)) { 1425 /* use LBA28 */ 1426 tf->command = ATA_CMD_VERIFY; 1427 tf->device |= (block >> 24) & 0xf; 1428 } else if (lba_48_ok(block, n_block)) { 1429 if (!(dev->flags & ATA_DFLAG_LBA48)) 1430 goto out_of_range; 1431 1432 /* use LBA48 */ 1433 tf->flags |= ATA_TFLAG_LBA48; 1434 tf->command = ATA_CMD_VERIFY_EXT; 1435 1436 tf->hob_nsect = (n_block >> 8) & 0xff; 1437 1438 tf->hob_lbah = (block >> 40) & 0xff; 1439 tf->hob_lbam = (block >> 32) & 0xff; 1440 tf->hob_lbal = (block >> 24) & 0xff; 1441 } else 1442 /* request too large even for LBA48 */ 1443 goto out_of_range; 1444 1445 tf->nsect = n_block & 0xff; 1446 1447 tf->lbah = (block >> 16) & 0xff; 1448 tf->lbam = (block >> 8) & 0xff; 1449 tf->lbal = block & 0xff; 1450 1451 tf->device |= ATA_LBA; 1452 } else { 1453 /* CHS */ 1454 u32 sect, head, cyl, track; 1455 1456 if (!lba_28_ok(block, n_block)) 1457 goto out_of_range; 1458 1459 /* Convert LBA to CHS */ 1460 track = (u32)block / dev->sectors; 1461 cyl = track / dev->heads; 1462 head = track % dev->heads; 1463 sect = (u32)block % dev->sectors + 1; 1464 1465 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1466 (u32)block, track, cyl, head, sect); 1467 1468 /* Check whether the converted CHS can fit. 1469 Cylinder: 0-65535 1470 Head: 0-15 1471 Sector: 1-255*/ 1472 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1473 goto out_of_range; 1474 1475 tf->command = ATA_CMD_VERIFY; 1476 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1477 tf->lbal = sect; 1478 tf->lbam = cyl; 1479 tf->lbah = cyl >> 8; 1480 tf->device |= head; 1481 } 1482 1483 return 0; 1484 1485 invalid_fld: 1486 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1487 return 1; 1488 1489 out_of_range: 1490 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1491 /* "Logical Block Address out of range" */ 1492 return 1; 1493 1494 nothing_to_do: 1495 scmd->result = SAM_STAT_GOOD; 1496 return 1; 1497 } 1498 1499 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1500 { 1501 struct request *rq = scmd->request; 1502 u32 req_blocks; 1503 1504 if (!blk_rq_is_passthrough(rq)) 1505 return true; 1506 1507 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1508 if (n_blocks > req_blocks) 1509 return false; 1510 1511 return true; 1512 } 1513 1514 /** 1515 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1516 * @qc: Storage for translated ATA taskfile 1517 * 1518 * Converts any of six SCSI read/write commands into the 1519 * ATA counterpart, including starting sector (LBA), 1520 * sector count, and taking into account the device's LBA48 1521 * support. 1522 * 1523 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1524 * %WRITE_16 are currently supported. 1525 * 1526 * LOCKING: 1527 * spin_lock_irqsave(host lock) 1528 * 1529 * RETURNS: 1530 * Zero on success, non-zero on error. 1531 */ 1532 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1533 { 1534 struct scsi_cmnd *scmd = qc->scsicmd; 1535 const u8 *cdb = scmd->cmnd; 1536 struct request *rq = scmd->request; 1537 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1538 unsigned int tf_flags = 0; 1539 u64 block; 1540 u32 n_block; 1541 int rc; 1542 u16 fp = 0; 1543 1544 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1545 tf_flags |= ATA_TFLAG_WRITE; 1546 1547 /* Calculate the SCSI LBA, transfer length and FUA. */ 1548 switch (cdb[0]) { 1549 case READ_10: 1550 case WRITE_10: 1551 if (unlikely(scmd->cmd_len < 10)) { 1552 fp = 9; 1553 goto invalid_fld; 1554 } 1555 scsi_10_lba_len(cdb, &block, &n_block); 1556 if (cdb[1] & (1 << 3)) 1557 tf_flags |= ATA_TFLAG_FUA; 1558 if (!ata_check_nblocks(scmd, n_block)) 1559 goto invalid_fld; 1560 break; 1561 case READ_6: 1562 case WRITE_6: 1563 if (unlikely(scmd->cmd_len < 6)) { 1564 fp = 5; 1565 goto invalid_fld; 1566 } 1567 scsi_6_lba_len(cdb, &block, &n_block); 1568 1569 /* for 6-byte r/w commands, transfer length 0 1570 * means 256 blocks of data, not 0 block. 1571 */ 1572 if (!n_block) 1573 n_block = 256; 1574 if (!ata_check_nblocks(scmd, n_block)) 1575 goto invalid_fld; 1576 break; 1577 case READ_16: 1578 case WRITE_16: 1579 if (unlikely(scmd->cmd_len < 16)) { 1580 fp = 15; 1581 goto invalid_fld; 1582 } 1583 scsi_16_lba_len(cdb, &block, &n_block); 1584 if (cdb[1] & (1 << 3)) 1585 tf_flags |= ATA_TFLAG_FUA; 1586 if (!ata_check_nblocks(scmd, n_block)) 1587 goto invalid_fld; 1588 break; 1589 default: 1590 DPRINTK("no-byte command\n"); 1591 fp = 0; 1592 goto invalid_fld; 1593 } 1594 1595 /* Check and compose ATA command */ 1596 if (!n_block) 1597 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1598 * length 0 means transfer 0 block of data. 1599 * However, for ATA R/W commands, sector count 0 means 1600 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1601 * 1602 * WARNING: one or two older ATA drives treat 0 as 0... 1603 */ 1604 goto nothing_to_do; 1605 1606 qc->flags |= ATA_QCFLAG_IO; 1607 qc->nbytes = n_block * scmd->device->sector_size; 1608 1609 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1610 qc->hw_tag, class); 1611 1612 if (likely(rc == 0)) 1613 return 0; 1614 1615 if (rc == -ERANGE) 1616 goto out_of_range; 1617 /* treat all other errors as -EINVAL, fall through */ 1618 invalid_fld: 1619 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1620 return 1; 1621 1622 out_of_range: 1623 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1624 /* "Logical Block Address out of range" */ 1625 return 1; 1626 1627 nothing_to_do: 1628 scmd->result = SAM_STAT_GOOD; 1629 return 1; 1630 } 1631 1632 static void ata_qc_done(struct ata_queued_cmd *qc) 1633 { 1634 struct scsi_cmnd *cmd = qc->scsicmd; 1635 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1636 1637 ata_qc_free(qc); 1638 done(cmd); 1639 } 1640 1641 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1642 { 1643 struct ata_port *ap = qc->ap; 1644 struct scsi_cmnd *cmd = qc->scsicmd; 1645 u8 *cdb = cmd->cmnd; 1646 int need_sense = (qc->err_mask != 0); 1647 1648 /* For ATA pass thru (SAT) commands, generate a sense block if 1649 * user mandated it or if there's an error. Note that if we 1650 * generate because the user forced us to [CK_COND =1], a check 1651 * condition is generated and the ATA register values are returned 1652 * whether the command completed successfully or not. If there 1653 * was no error, we use the following sense data: 1654 * sk = RECOVERED ERROR 1655 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1656 */ 1657 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1658 ((cdb[2] & 0x20) || need_sense)) 1659 ata_gen_passthru_sense(qc); 1660 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1661 cmd->result = SAM_STAT_CHECK_CONDITION; 1662 else if (need_sense) 1663 ata_gen_ata_sense(qc); 1664 else 1665 cmd->result = SAM_STAT_GOOD; 1666 1667 if (need_sense && !ap->ops->error_handler) 1668 ata_dump_status(ap->print_id, &qc->result_tf); 1669 1670 ata_qc_done(qc); 1671 } 1672 1673 /** 1674 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1675 * @dev: ATA device to which the command is addressed 1676 * @cmd: SCSI command to execute 1677 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1678 * 1679 * Our ->queuecommand() function has decided that the SCSI 1680 * command issued can be directly translated into an ATA 1681 * command, rather than handled internally. 1682 * 1683 * This function sets up an ata_queued_cmd structure for the 1684 * SCSI command, and sends that ata_queued_cmd to the hardware. 1685 * 1686 * The xlat_func argument (actor) returns 0 if ready to execute 1687 * ATA command, else 1 to finish translation. If 1 is returned 1688 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1689 * to be set reflecting an error condition or clean (early) 1690 * termination. 1691 * 1692 * LOCKING: 1693 * spin_lock_irqsave(host lock) 1694 * 1695 * RETURNS: 1696 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1697 * needs to be deferred. 1698 */ 1699 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1700 ata_xlat_func_t xlat_func) 1701 { 1702 struct ata_port *ap = dev->link->ap; 1703 struct ata_queued_cmd *qc; 1704 int rc; 1705 1706 VPRINTK("ENTER\n"); 1707 1708 qc = ata_scsi_qc_new(dev, cmd); 1709 if (!qc) 1710 goto err_mem; 1711 1712 /* data is present; dma-map it */ 1713 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1714 cmd->sc_data_direction == DMA_TO_DEVICE) { 1715 if (unlikely(scsi_bufflen(cmd) < 1)) { 1716 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1717 goto err_did; 1718 } 1719 1720 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1721 1722 qc->dma_dir = cmd->sc_data_direction; 1723 } 1724 1725 qc->complete_fn = ata_scsi_qc_complete; 1726 1727 if (xlat_func(qc)) 1728 goto early_finish; 1729 1730 if (ap->ops->qc_defer) { 1731 if ((rc = ap->ops->qc_defer(qc))) 1732 goto defer; 1733 } 1734 1735 /* select device, send command to hardware */ 1736 ata_qc_issue(qc); 1737 1738 VPRINTK("EXIT\n"); 1739 return 0; 1740 1741 early_finish: 1742 ata_qc_free(qc); 1743 cmd->scsi_done(cmd); 1744 DPRINTK("EXIT - early finish (good or error)\n"); 1745 return 0; 1746 1747 err_did: 1748 ata_qc_free(qc); 1749 cmd->result = (DID_ERROR << 16); 1750 cmd->scsi_done(cmd); 1751 err_mem: 1752 DPRINTK("EXIT - internal\n"); 1753 return 0; 1754 1755 defer: 1756 ata_qc_free(qc); 1757 DPRINTK("EXIT - defer\n"); 1758 if (rc == ATA_DEFER_LINK) 1759 return SCSI_MLQUEUE_DEVICE_BUSY; 1760 else 1761 return SCSI_MLQUEUE_HOST_BUSY; 1762 } 1763 1764 struct ata_scsi_args { 1765 struct ata_device *dev; 1766 u16 *id; 1767 struct scsi_cmnd *cmd; 1768 }; 1769 1770 /** 1771 * ata_scsi_rbuf_get - Map response buffer. 1772 * @cmd: SCSI command containing buffer to be mapped. 1773 * @flags: unsigned long variable to store irq enable status 1774 * @copy_in: copy in from user buffer 1775 * 1776 * Prepare buffer for simulated SCSI commands. 1777 * 1778 * LOCKING: 1779 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 1780 * 1781 * RETURNS: 1782 * Pointer to response buffer. 1783 */ 1784 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 1785 unsigned long *flags) 1786 { 1787 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 1788 1789 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1790 if (copy_in) 1791 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1792 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1793 return ata_scsi_rbuf; 1794 } 1795 1796 /** 1797 * ata_scsi_rbuf_put - Unmap response buffer. 1798 * @cmd: SCSI command containing buffer to be unmapped. 1799 * @copy_out: copy out result 1800 * @flags: @flags passed to ata_scsi_rbuf_get() 1801 * 1802 * Returns rbuf buffer. The result is copied to @cmd's buffer if 1803 * @copy_back is true. 1804 * 1805 * LOCKING: 1806 * Unlocks ata_scsi_rbuf_lock. 1807 */ 1808 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 1809 unsigned long *flags) 1810 { 1811 if (copy_out) 1812 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1813 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1814 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 1815 } 1816 1817 /** 1818 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1819 * @args: device IDENTIFY data / SCSI command of interest. 1820 * @actor: Callback hook for desired SCSI command simulator 1821 * 1822 * Takes care of the hard work of simulating a SCSI command... 1823 * Mapping the response buffer, calling the command's handler, 1824 * and handling the handler's return value. This return value 1825 * indicates whether the handler wishes the SCSI command to be 1826 * completed successfully (0), or not (in which case cmd->result 1827 * and sense buffer are assumed to be set). 1828 * 1829 * LOCKING: 1830 * spin_lock_irqsave(host lock) 1831 */ 1832 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1833 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1834 { 1835 u8 *rbuf; 1836 unsigned int rc; 1837 struct scsi_cmnd *cmd = args->cmd; 1838 unsigned long flags; 1839 1840 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 1841 rc = actor(args, rbuf); 1842 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 1843 1844 if (rc == 0) 1845 cmd->result = SAM_STAT_GOOD; 1846 } 1847 1848 /** 1849 * ata_scsiop_inq_std - Simulate INQUIRY command 1850 * @args: device IDENTIFY data / SCSI command of interest. 1851 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1852 * 1853 * Returns standard device identification data associated 1854 * with non-VPD INQUIRY command output. 1855 * 1856 * LOCKING: 1857 * spin_lock_irqsave(host lock) 1858 */ 1859 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1860 { 1861 static const u8 versions[] = { 1862 0x00, 1863 0x60, /* SAM-3 (no version claimed) */ 1864 1865 0x03, 1866 0x20, /* SBC-2 (no version claimed) */ 1867 1868 0x03, 1869 0x00 /* SPC-3 (no version claimed) */ 1870 }; 1871 static const u8 versions_zbc[] = { 1872 0x00, 1873 0xA0, /* SAM-5 (no version claimed) */ 1874 1875 0x06, 1876 0x00, /* SBC-4 (no version claimed) */ 1877 1878 0x05, 1879 0xC0, /* SPC-5 (no version claimed) */ 1880 1881 0x60, 1882 0x24, /* ZBC r05 */ 1883 }; 1884 1885 u8 hdr[] = { 1886 TYPE_DISK, 1887 0, 1888 0x5, /* claim SPC-3 version compatibility */ 1889 2, 1890 95 - 4, 1891 0, 1892 0, 1893 2 1894 }; 1895 1896 VPRINTK("ENTER\n"); 1897 1898 /* set scsi removable (RMB) bit per ata bit, or if the 1899 * AHCI port says it's external (Hotplug-capable, eSATA). 1900 */ 1901 if (ata_id_removable(args->id) || 1902 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1903 hdr[1] |= (1 << 7); 1904 1905 if (args->dev->class == ATA_DEV_ZAC) { 1906 hdr[0] = TYPE_ZBC; 1907 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1908 } 1909 1910 memcpy(rbuf, hdr, sizeof(hdr)); 1911 memcpy(&rbuf[8], "ATA ", 8); 1912 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1913 1914 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1915 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1916 if (strncmp(&rbuf[32], " ", 4) == 0) 1917 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1918 1919 if (rbuf[32] == 0 || rbuf[32] == ' ') 1920 memcpy(&rbuf[32], "n/a ", 4); 1921 1922 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1923 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1924 else 1925 memcpy(rbuf + 58, versions, sizeof(versions)); 1926 1927 return 0; 1928 } 1929 1930 /** 1931 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1932 * @args: device IDENTIFY data / SCSI command of interest. 1933 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1934 * 1935 * Returns list of inquiry VPD pages available. 1936 * 1937 * LOCKING: 1938 * spin_lock_irqsave(host lock) 1939 */ 1940 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1941 { 1942 int num_pages; 1943 static const u8 pages[] = { 1944 0x00, /* page 0x00, this page */ 1945 0x80, /* page 0x80, unit serial no page */ 1946 0x83, /* page 0x83, device ident page */ 1947 0x89, /* page 0x89, ata info page */ 1948 0xb0, /* page 0xb0, block limits page */ 1949 0xb1, /* page 0xb1, block device characteristics page */ 1950 0xb2, /* page 0xb2, thin provisioning page */ 1951 0xb6, /* page 0xb6, zoned block device characteristics */ 1952 }; 1953 1954 num_pages = sizeof(pages); 1955 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 1956 num_pages--; 1957 rbuf[3] = num_pages; /* number of supported VPD pages */ 1958 memcpy(rbuf + 4, pages, num_pages); 1959 return 0; 1960 } 1961 1962 /** 1963 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1964 * @args: device IDENTIFY data / SCSI command of interest. 1965 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1966 * 1967 * Returns ATA device serial number. 1968 * 1969 * LOCKING: 1970 * spin_lock_irqsave(host lock) 1971 */ 1972 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1973 { 1974 static const u8 hdr[] = { 1975 0, 1976 0x80, /* this page code */ 1977 0, 1978 ATA_ID_SERNO_LEN, /* page len */ 1979 }; 1980 1981 memcpy(rbuf, hdr, sizeof(hdr)); 1982 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1983 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1984 return 0; 1985 } 1986 1987 /** 1988 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1989 * @args: device IDENTIFY data / SCSI command of interest. 1990 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1991 * 1992 * Yields two logical unit device identification designators: 1993 * - vendor specific ASCII containing the ATA serial number 1994 * - SAT defined "t10 vendor id based" containing ASCII vendor 1995 * name ("ATA "), model and serial numbers. 1996 * 1997 * LOCKING: 1998 * spin_lock_irqsave(host lock) 1999 */ 2000 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2001 { 2002 const int sat_model_serial_desc_len = 68; 2003 int num; 2004 2005 rbuf[1] = 0x83; /* this page code */ 2006 num = 4; 2007 2008 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2009 rbuf[num + 0] = 2; 2010 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2011 num += 4; 2012 ata_id_string(args->id, (unsigned char *) rbuf + num, 2013 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2014 num += ATA_ID_SERNO_LEN; 2015 2016 /* SAT defined lu model and serial numbers descriptor */ 2017 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2018 rbuf[num + 0] = 2; 2019 rbuf[num + 1] = 1; 2020 rbuf[num + 3] = sat_model_serial_desc_len; 2021 num += 4; 2022 memcpy(rbuf + num, "ATA ", 8); 2023 num += 8; 2024 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2025 ATA_ID_PROD_LEN); 2026 num += ATA_ID_PROD_LEN; 2027 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2028 ATA_ID_SERNO_LEN); 2029 num += ATA_ID_SERNO_LEN; 2030 2031 if (ata_id_has_wwn(args->id)) { 2032 /* SAT defined lu world wide name */ 2033 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2034 rbuf[num + 0] = 1; 2035 rbuf[num + 1] = 3; 2036 rbuf[num + 3] = ATA_ID_WWN_LEN; 2037 num += 4; 2038 ata_id_string(args->id, (unsigned char *) rbuf + num, 2039 ATA_ID_WWN, ATA_ID_WWN_LEN); 2040 num += ATA_ID_WWN_LEN; 2041 } 2042 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2043 return 0; 2044 } 2045 2046 /** 2047 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2048 * @args: device IDENTIFY data / SCSI command of interest. 2049 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2050 * 2051 * Yields SAT-specified ATA VPD page. 2052 * 2053 * LOCKING: 2054 * spin_lock_irqsave(host lock) 2055 */ 2056 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2057 { 2058 rbuf[1] = 0x89; /* our page code */ 2059 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2060 rbuf[3] = (0x238 & 0xff); 2061 2062 memcpy(&rbuf[8], "linux ", 8); 2063 memcpy(&rbuf[16], "libata ", 16); 2064 memcpy(&rbuf[32], DRV_VERSION, 4); 2065 2066 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2067 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2068 /* TODO: PMP? */ 2069 2070 /* we don't store the ATA device signature, so we fake it */ 2071 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2072 rbuf[40] = 0x1; 2073 rbuf[48] = 0x1; 2074 2075 rbuf[56] = ATA_CMD_ID_ATA; 2076 2077 memcpy(&rbuf[60], &args->id[0], 512); 2078 return 0; 2079 } 2080 2081 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2082 { 2083 u16 min_io_sectors; 2084 2085 rbuf[1] = 0xb0; 2086 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2087 2088 /* 2089 * Optimal transfer length granularity. 2090 * 2091 * This is always one physical block, but for disks with a smaller 2092 * logical than physical sector size we need to figure out what the 2093 * latter is. 2094 */ 2095 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2096 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2097 2098 /* 2099 * Optimal unmap granularity. 2100 * 2101 * The ATA spec doesn't even know about a granularity or alignment 2102 * for the TRIM command. We can leave away most of the unmap related 2103 * VPD page entries, but we have specifify a granularity to signal 2104 * that we support some form of unmap - in thise case via WRITE SAME 2105 * with the unmap bit set. 2106 */ 2107 if (ata_id_has_trim(args->id)) { 2108 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); 2109 put_unaligned_be32(1, &rbuf[28]); 2110 } 2111 2112 return 0; 2113 } 2114 2115 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2116 { 2117 int form_factor = ata_id_form_factor(args->id); 2118 int media_rotation_rate = ata_id_rotation_rate(args->id); 2119 u8 zoned = ata_id_zoned_cap(args->id); 2120 2121 rbuf[1] = 0xb1; 2122 rbuf[3] = 0x3c; 2123 rbuf[4] = media_rotation_rate >> 8; 2124 rbuf[5] = media_rotation_rate; 2125 rbuf[7] = form_factor; 2126 if (zoned) 2127 rbuf[8] = (zoned << 4); 2128 2129 return 0; 2130 } 2131 2132 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2133 { 2134 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2135 rbuf[1] = 0xb2; 2136 rbuf[3] = 0x4; 2137 rbuf[5] = 1 << 6; /* TPWS */ 2138 2139 return 0; 2140 } 2141 2142 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2143 { 2144 /* 2145 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2146 */ 2147 rbuf[1] = 0xb6; 2148 rbuf[3] = 0x3C; 2149 2150 /* 2151 * URSWRZ bit is only meaningful for host-managed ZAC drives 2152 */ 2153 if (args->dev->zac_zoned_cap & 1) 2154 rbuf[4] |= 1; 2155 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2156 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2157 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2158 2159 return 0; 2160 } 2161 2162 /** 2163 * modecpy - Prepare response for MODE SENSE 2164 * @dest: output buffer 2165 * @src: data being copied 2166 * @n: length of mode page 2167 * @changeable: whether changeable parameters are requested 2168 * 2169 * Generate a generic MODE SENSE page for either current or changeable 2170 * parameters. 2171 * 2172 * LOCKING: 2173 * None. 2174 */ 2175 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2176 { 2177 if (changeable) { 2178 memcpy(dest, src, 2); 2179 memset(dest + 2, 0, n - 2); 2180 } else { 2181 memcpy(dest, src, n); 2182 } 2183 } 2184 2185 /** 2186 * ata_msense_caching - Simulate MODE SENSE caching info page 2187 * @id: device IDENTIFY data 2188 * @buf: output buffer 2189 * @changeable: whether changeable parameters are requested 2190 * 2191 * Generate a caching info page, which conditionally indicates 2192 * write caching to the SCSI layer, depending on device 2193 * capabilities. 2194 * 2195 * LOCKING: 2196 * None. 2197 */ 2198 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2199 { 2200 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2201 if (changeable) { 2202 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2203 } else { 2204 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2205 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2206 } 2207 return sizeof(def_cache_mpage); 2208 } 2209 2210 /** 2211 * ata_msense_control - Simulate MODE SENSE control mode page 2212 * @dev: ATA device of interest 2213 * @buf: output buffer 2214 * @changeable: whether changeable parameters are requested 2215 * 2216 * Generate a generic MODE SENSE control mode page. 2217 * 2218 * LOCKING: 2219 * None. 2220 */ 2221 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2222 bool changeable) 2223 { 2224 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2225 if (changeable) { 2226 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2227 } else { 2228 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2229 2230 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2231 } 2232 return sizeof(def_control_mpage); 2233 } 2234 2235 /** 2236 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2237 * @buf: output buffer 2238 * @changeable: whether changeable parameters are requested 2239 * 2240 * Generate a generic MODE SENSE r/w error recovery page. 2241 * 2242 * LOCKING: 2243 * None. 2244 */ 2245 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2246 { 2247 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2248 changeable); 2249 return sizeof(def_rw_recovery_mpage); 2250 } 2251 2252 /* 2253 * We can turn this into a real blacklist if it's needed, for now just 2254 * blacklist any Maxtor BANC1G10 revision firmware 2255 */ 2256 static int ata_dev_supports_fua(u16 *id) 2257 { 2258 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2259 2260 if (!libata_fua) 2261 return 0; 2262 if (!ata_id_has_fua(id)) 2263 return 0; 2264 2265 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2266 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2267 2268 if (strcmp(model, "Maxtor")) 2269 return 1; 2270 if (strcmp(fw, "BANC1G10")) 2271 return 1; 2272 2273 return 0; /* blacklisted */ 2274 } 2275 2276 /** 2277 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2278 * @args: device IDENTIFY data / SCSI command of interest. 2279 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2280 * 2281 * Simulate MODE SENSE commands. Assume this is invoked for direct 2282 * access devices (e.g. disks) only. There should be no block 2283 * descriptor for other device types. 2284 * 2285 * LOCKING: 2286 * spin_lock_irqsave(host lock) 2287 */ 2288 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2289 { 2290 struct ata_device *dev = args->dev; 2291 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2292 static const u8 sat_blk_desc[] = { 2293 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2294 0, 2295 0, 0x2, 0x0 /* block length: 512 bytes */ 2296 }; 2297 u8 pg, spg; 2298 unsigned int ebd, page_control, six_byte; 2299 u8 dpofua, bp = 0xff; 2300 u16 fp; 2301 2302 VPRINTK("ENTER\n"); 2303 2304 six_byte = (scsicmd[0] == MODE_SENSE); 2305 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2306 /* 2307 * LLBA bit in msense(10) ignored (compliant) 2308 */ 2309 2310 page_control = scsicmd[2] >> 6; 2311 switch (page_control) { 2312 case 0: /* current */ 2313 case 1: /* changeable */ 2314 case 2: /* defaults */ 2315 break; /* supported */ 2316 case 3: /* saved */ 2317 goto saving_not_supp; 2318 default: 2319 fp = 2; 2320 bp = 6; 2321 goto invalid_fld; 2322 } 2323 2324 if (six_byte) 2325 p += 4 + (ebd ? 8 : 0); 2326 else 2327 p += 8 + (ebd ? 8 : 0); 2328 2329 pg = scsicmd[2] & 0x3f; 2330 spg = scsicmd[3]; 2331 /* 2332 * No mode subpages supported (yet) but asking for _all_ 2333 * subpages may be valid 2334 */ 2335 if (spg && (spg != ALL_SUB_MPAGES)) { 2336 fp = 3; 2337 goto invalid_fld; 2338 } 2339 2340 switch(pg) { 2341 case RW_RECOVERY_MPAGE: 2342 p += ata_msense_rw_recovery(p, page_control == 1); 2343 break; 2344 2345 case CACHE_MPAGE: 2346 p += ata_msense_caching(args->id, p, page_control == 1); 2347 break; 2348 2349 case CONTROL_MPAGE: 2350 p += ata_msense_control(args->dev, p, page_control == 1); 2351 break; 2352 2353 case ALL_MPAGES: 2354 p += ata_msense_rw_recovery(p, page_control == 1); 2355 p += ata_msense_caching(args->id, p, page_control == 1); 2356 p += ata_msense_control(args->dev, p, page_control == 1); 2357 break; 2358 2359 default: /* invalid page code */ 2360 fp = 2; 2361 goto invalid_fld; 2362 } 2363 2364 dpofua = 0; 2365 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2366 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2367 dpofua = 1 << 4; 2368 2369 if (six_byte) { 2370 rbuf[0] = p - rbuf - 1; 2371 rbuf[2] |= dpofua; 2372 if (ebd) { 2373 rbuf[3] = sizeof(sat_blk_desc); 2374 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2375 } 2376 } else { 2377 unsigned int output_len = p - rbuf - 2; 2378 2379 rbuf[0] = output_len >> 8; 2380 rbuf[1] = output_len; 2381 rbuf[3] |= dpofua; 2382 if (ebd) { 2383 rbuf[7] = sizeof(sat_blk_desc); 2384 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2385 } 2386 } 2387 return 0; 2388 2389 invalid_fld: 2390 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2391 return 1; 2392 2393 saving_not_supp: 2394 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2395 /* "Saving parameters not supported" */ 2396 return 1; 2397 } 2398 2399 /** 2400 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2401 * @args: device IDENTIFY data / SCSI command of interest. 2402 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2403 * 2404 * Simulate READ CAPACITY commands. 2405 * 2406 * LOCKING: 2407 * None. 2408 */ 2409 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2410 { 2411 struct ata_device *dev = args->dev; 2412 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2413 u32 sector_size; /* physical sector size in bytes */ 2414 u8 log2_per_phys; 2415 u16 lowest_aligned; 2416 2417 sector_size = ata_id_logical_sector_size(dev->id); 2418 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2419 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2420 2421 VPRINTK("ENTER\n"); 2422 2423 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2424 if (last_lba >= 0xffffffffULL) 2425 last_lba = 0xffffffff; 2426 2427 /* sector count, 32-bit */ 2428 rbuf[0] = last_lba >> (8 * 3); 2429 rbuf[1] = last_lba >> (8 * 2); 2430 rbuf[2] = last_lba >> (8 * 1); 2431 rbuf[3] = last_lba; 2432 2433 /* sector size */ 2434 rbuf[4] = sector_size >> (8 * 3); 2435 rbuf[5] = sector_size >> (8 * 2); 2436 rbuf[6] = sector_size >> (8 * 1); 2437 rbuf[7] = sector_size; 2438 } else { 2439 /* sector count, 64-bit */ 2440 rbuf[0] = last_lba >> (8 * 7); 2441 rbuf[1] = last_lba >> (8 * 6); 2442 rbuf[2] = last_lba >> (8 * 5); 2443 rbuf[3] = last_lba >> (8 * 4); 2444 rbuf[4] = last_lba >> (8 * 3); 2445 rbuf[5] = last_lba >> (8 * 2); 2446 rbuf[6] = last_lba >> (8 * 1); 2447 rbuf[7] = last_lba; 2448 2449 /* sector size */ 2450 rbuf[ 8] = sector_size >> (8 * 3); 2451 rbuf[ 9] = sector_size >> (8 * 2); 2452 rbuf[10] = sector_size >> (8 * 1); 2453 rbuf[11] = sector_size; 2454 2455 rbuf[12] = 0; 2456 rbuf[13] = log2_per_phys; 2457 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2458 rbuf[15] = lowest_aligned; 2459 2460 if (ata_id_has_trim(args->id) && 2461 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2462 rbuf[14] |= 0x80; /* LBPME */ 2463 2464 if (ata_id_has_zero_after_trim(args->id) && 2465 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2466 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2467 rbuf[14] |= 0x40; /* LBPRZ */ 2468 } 2469 } 2470 if (ata_id_zoned_cap(args->id) || 2471 args->dev->class == ATA_DEV_ZAC) 2472 rbuf[12] = (1 << 4); /* RC_BASIS */ 2473 } 2474 return 0; 2475 } 2476 2477 /** 2478 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2479 * @args: device IDENTIFY data / SCSI command of interest. 2480 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2481 * 2482 * Simulate REPORT LUNS command. 2483 * 2484 * LOCKING: 2485 * spin_lock_irqsave(host lock) 2486 */ 2487 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2488 { 2489 VPRINTK("ENTER\n"); 2490 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2491 2492 return 0; 2493 } 2494 2495 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2496 { 2497 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2498 /* FIXME: not quite right; we don't want the 2499 * translation of taskfile registers into 2500 * a sense descriptors, since that's only 2501 * correct for ATA, not ATAPI 2502 */ 2503 ata_gen_passthru_sense(qc); 2504 } 2505 2506 ata_qc_done(qc); 2507 } 2508 2509 /* is it pointless to prefer PIO for "safety reasons"? */ 2510 static inline int ata_pio_use_silly(struct ata_port *ap) 2511 { 2512 return (ap->flags & ATA_FLAG_PIO_DMA); 2513 } 2514 2515 static void atapi_request_sense(struct ata_queued_cmd *qc) 2516 { 2517 struct ata_port *ap = qc->ap; 2518 struct scsi_cmnd *cmd = qc->scsicmd; 2519 2520 DPRINTK("ATAPI request sense\n"); 2521 2522 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2523 2524 #ifdef CONFIG_ATA_SFF 2525 if (ap->ops->sff_tf_read) 2526 ap->ops->sff_tf_read(ap, &qc->tf); 2527 #endif 2528 2529 /* fill these in, for the case where they are -not- overwritten */ 2530 cmd->sense_buffer[0] = 0x70; 2531 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2532 2533 ata_qc_reinit(qc); 2534 2535 /* setup sg table and init transfer direction */ 2536 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2537 ata_sg_init(qc, &qc->sgent, 1); 2538 qc->dma_dir = DMA_FROM_DEVICE; 2539 2540 memset(&qc->cdb, 0, qc->dev->cdb_len); 2541 qc->cdb[0] = REQUEST_SENSE; 2542 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2543 2544 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2545 qc->tf.command = ATA_CMD_PACKET; 2546 2547 if (ata_pio_use_silly(ap)) { 2548 qc->tf.protocol = ATAPI_PROT_DMA; 2549 qc->tf.feature |= ATAPI_PKT_DMA; 2550 } else { 2551 qc->tf.protocol = ATAPI_PROT_PIO; 2552 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2553 qc->tf.lbah = 0; 2554 } 2555 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2556 2557 qc->complete_fn = atapi_sense_complete; 2558 2559 ata_qc_issue(qc); 2560 2561 DPRINTK("EXIT\n"); 2562 } 2563 2564 /* 2565 * ATAPI devices typically report zero for their SCSI version, and sometimes 2566 * deviate from the spec WRT response data format. If SCSI version is 2567 * reported as zero like normal, then we make the following fixups: 2568 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2569 * modern device. 2570 * 2) Ensure response data format / ATAPI information are always correct. 2571 */ 2572 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2573 { 2574 u8 buf[4]; 2575 2576 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2577 if (buf[2] == 0) { 2578 buf[2] = 0x5; 2579 buf[3] = 0x32; 2580 } 2581 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2582 } 2583 2584 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2585 { 2586 struct scsi_cmnd *cmd = qc->scsicmd; 2587 unsigned int err_mask = qc->err_mask; 2588 2589 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2590 2591 /* handle completion from new EH */ 2592 if (unlikely(qc->ap->ops->error_handler && 2593 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2594 2595 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2596 /* FIXME: not quite right; we don't want the 2597 * translation of taskfile registers into a 2598 * sense descriptors, since that's only 2599 * correct for ATA, not ATAPI 2600 */ 2601 ata_gen_passthru_sense(qc); 2602 } 2603 2604 /* SCSI EH automatically locks door if sdev->locked is 2605 * set. Sometimes door lock request continues to 2606 * fail, for example, when no media is present. This 2607 * creates a loop - SCSI EH issues door lock which 2608 * fails and gets invoked again to acquire sense data 2609 * for the failed command. 2610 * 2611 * If door lock fails, always clear sdev->locked to 2612 * avoid this infinite loop. 2613 * 2614 * This may happen before SCSI scan is complete. Make 2615 * sure qc->dev->sdev isn't NULL before dereferencing. 2616 */ 2617 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2618 qc->dev->sdev->locked = 0; 2619 2620 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2621 ata_qc_done(qc); 2622 return; 2623 } 2624 2625 /* successful completion or old EH failure path */ 2626 if (unlikely(err_mask & AC_ERR_DEV)) { 2627 cmd->result = SAM_STAT_CHECK_CONDITION; 2628 atapi_request_sense(qc); 2629 return; 2630 } else if (unlikely(err_mask)) { 2631 /* FIXME: not quite right; we don't want the 2632 * translation of taskfile registers into 2633 * a sense descriptors, since that's only 2634 * correct for ATA, not ATAPI 2635 */ 2636 ata_gen_passthru_sense(qc); 2637 } else { 2638 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2639 atapi_fixup_inquiry(cmd); 2640 cmd->result = SAM_STAT_GOOD; 2641 } 2642 2643 ata_qc_done(qc); 2644 } 2645 /** 2646 * atapi_xlat - Initialize PACKET taskfile 2647 * @qc: command structure to be initialized 2648 * 2649 * LOCKING: 2650 * spin_lock_irqsave(host lock) 2651 * 2652 * RETURNS: 2653 * Zero on success, non-zero on failure. 2654 */ 2655 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2656 { 2657 struct scsi_cmnd *scmd = qc->scsicmd; 2658 struct ata_device *dev = qc->dev; 2659 int nodata = (scmd->sc_data_direction == DMA_NONE); 2660 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2661 unsigned int nbytes; 2662 2663 memset(qc->cdb, 0, dev->cdb_len); 2664 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2665 2666 qc->complete_fn = atapi_qc_complete; 2667 2668 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2669 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2670 qc->tf.flags |= ATA_TFLAG_WRITE; 2671 DPRINTK("direction: write\n"); 2672 } 2673 2674 qc->tf.command = ATA_CMD_PACKET; 2675 ata_qc_set_pc_nbytes(qc); 2676 2677 /* check whether ATAPI DMA is safe */ 2678 if (!nodata && !using_pio && atapi_check_dma(qc)) 2679 using_pio = 1; 2680 2681 /* Some controller variants snoop this value for Packet 2682 * transfers to do state machine and FIFO management. Thus we 2683 * want to set it properly, and for DMA where it is 2684 * effectively meaningless. 2685 */ 2686 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2687 2688 /* Most ATAPI devices which honor transfer chunk size don't 2689 * behave according to the spec when odd chunk size which 2690 * matches the transfer length is specified. If the number of 2691 * bytes to transfer is 2n+1. According to the spec, what 2692 * should happen is to indicate that 2n+1 is going to be 2693 * transferred and transfer 2n+2 bytes where the last byte is 2694 * padding. 2695 * 2696 * In practice, this doesn't happen. ATAPI devices first 2697 * indicate and transfer 2n bytes and then indicate and 2698 * transfer 2 bytes where the last byte is padding. 2699 * 2700 * This inconsistency confuses several controllers which 2701 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2702 * These controllers use actual number of transferred bytes to 2703 * update DMA pointer and transfer of 4n+2 bytes make those 2704 * controller push DMA pointer by 4n+4 bytes because SATA data 2705 * FISes are aligned to 4 bytes. This causes data corruption 2706 * and buffer overrun. 2707 * 2708 * Always setting nbytes to even number solves this problem 2709 * because then ATAPI devices don't have to split data at 2n 2710 * boundaries. 2711 */ 2712 if (nbytes & 0x1) 2713 nbytes++; 2714 2715 qc->tf.lbam = (nbytes & 0xFF); 2716 qc->tf.lbah = (nbytes >> 8); 2717 2718 if (nodata) 2719 qc->tf.protocol = ATAPI_PROT_NODATA; 2720 else if (using_pio) 2721 qc->tf.protocol = ATAPI_PROT_PIO; 2722 else { 2723 /* DMA data xfer */ 2724 qc->tf.protocol = ATAPI_PROT_DMA; 2725 qc->tf.feature |= ATAPI_PKT_DMA; 2726 2727 if ((dev->flags & ATA_DFLAG_DMADIR) && 2728 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2729 /* some SATA bridges need us to indicate data xfer direction */ 2730 qc->tf.feature |= ATAPI_DMADIR; 2731 } 2732 2733 2734 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2735 as ATAPI tape drives don't get this right otherwise */ 2736 return 0; 2737 } 2738 2739 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2740 { 2741 if (!sata_pmp_attached(ap)) { 2742 if (likely(devno >= 0 && 2743 devno < ata_link_max_devices(&ap->link))) 2744 return &ap->link.device[devno]; 2745 } else { 2746 if (likely(devno >= 0 && 2747 devno < ap->nr_pmp_links)) 2748 return &ap->pmp_link[devno].device[0]; 2749 } 2750 2751 return NULL; 2752 } 2753 2754 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2755 const struct scsi_device *scsidev) 2756 { 2757 int devno; 2758 2759 /* skip commands not addressed to targets we simulate */ 2760 if (!sata_pmp_attached(ap)) { 2761 if (unlikely(scsidev->channel || scsidev->lun)) 2762 return NULL; 2763 devno = scsidev->id; 2764 } else { 2765 if (unlikely(scsidev->id || scsidev->lun)) 2766 return NULL; 2767 devno = scsidev->channel; 2768 } 2769 2770 return ata_find_dev(ap, devno); 2771 } 2772 2773 /** 2774 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2775 * @ap: ATA port to which the device is attached 2776 * @scsidev: SCSI device from which we derive the ATA device 2777 * 2778 * Given various information provided in struct scsi_cmnd, 2779 * map that onto an ATA bus, and using that mapping 2780 * determine which ata_device is associated with the 2781 * SCSI command to be sent. 2782 * 2783 * LOCKING: 2784 * spin_lock_irqsave(host lock) 2785 * 2786 * RETURNS: 2787 * Associated ATA device, or %NULL if not found. 2788 */ 2789 struct ata_device * 2790 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2791 { 2792 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2793 2794 if (unlikely(!dev || !ata_dev_enabled(dev))) 2795 return NULL; 2796 2797 return dev; 2798 } 2799 2800 /* 2801 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2802 * @byte1: Byte 1 from pass-thru CDB. 2803 * 2804 * RETURNS: 2805 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2806 */ 2807 static u8 2808 ata_scsi_map_proto(u8 byte1) 2809 { 2810 switch((byte1 & 0x1e) >> 1) { 2811 case 3: /* Non-data */ 2812 return ATA_PROT_NODATA; 2813 2814 case 6: /* DMA */ 2815 case 10: /* UDMA Data-in */ 2816 case 11: /* UDMA Data-Out */ 2817 return ATA_PROT_DMA; 2818 2819 case 4: /* PIO Data-in */ 2820 case 5: /* PIO Data-out */ 2821 return ATA_PROT_PIO; 2822 2823 case 12: /* FPDMA */ 2824 return ATA_PROT_NCQ; 2825 2826 case 0: /* Hard Reset */ 2827 case 1: /* SRST */ 2828 case 8: /* Device Diagnostic */ 2829 case 9: /* Device Reset */ 2830 case 7: /* DMA Queued */ 2831 case 15: /* Return Response Info */ 2832 default: /* Reserved */ 2833 break; 2834 } 2835 2836 return ATA_PROT_UNKNOWN; 2837 } 2838 2839 /** 2840 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2841 * @qc: command structure to be initialized 2842 * 2843 * Handles either 12, 16, or 32-byte versions of the CDB. 2844 * 2845 * RETURNS: 2846 * Zero on success, non-zero on failure. 2847 */ 2848 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2849 { 2850 struct ata_taskfile *tf = &(qc->tf); 2851 struct scsi_cmnd *scmd = qc->scsicmd; 2852 struct ata_device *dev = qc->dev; 2853 const u8 *cdb = scmd->cmnd; 2854 u16 fp; 2855 u16 cdb_offset = 0; 2856 2857 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2858 if (cdb[0] == VARIABLE_LENGTH_CMD) 2859 cdb_offset = 9; 2860 2861 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2862 if (tf->protocol == ATA_PROT_UNKNOWN) { 2863 fp = 1; 2864 goto invalid_fld; 2865 } 2866 2867 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0) 2868 tf->protocol = ATA_PROT_NCQ_NODATA; 2869 2870 /* enable LBA */ 2871 tf->flags |= ATA_TFLAG_LBA; 2872 2873 /* 2874 * 12 and 16 byte CDBs use different offsets to 2875 * provide the various register values. 2876 */ 2877 if (cdb[0] == ATA_16) { 2878 /* 2879 * 16-byte CDB - may contain extended commands. 2880 * 2881 * If that is the case, copy the upper byte register values. 2882 */ 2883 if (cdb[1] & 0x01) { 2884 tf->hob_feature = cdb[3]; 2885 tf->hob_nsect = cdb[5]; 2886 tf->hob_lbal = cdb[7]; 2887 tf->hob_lbam = cdb[9]; 2888 tf->hob_lbah = cdb[11]; 2889 tf->flags |= ATA_TFLAG_LBA48; 2890 } else 2891 tf->flags &= ~ATA_TFLAG_LBA48; 2892 2893 /* 2894 * Always copy low byte, device and command registers. 2895 */ 2896 tf->feature = cdb[4]; 2897 tf->nsect = cdb[6]; 2898 tf->lbal = cdb[8]; 2899 tf->lbam = cdb[10]; 2900 tf->lbah = cdb[12]; 2901 tf->device = cdb[13]; 2902 tf->command = cdb[14]; 2903 } else if (cdb[0] == ATA_12) { 2904 /* 2905 * 12-byte CDB - incapable of extended commands. 2906 */ 2907 tf->flags &= ~ATA_TFLAG_LBA48; 2908 2909 tf->feature = cdb[3]; 2910 tf->nsect = cdb[4]; 2911 tf->lbal = cdb[5]; 2912 tf->lbam = cdb[6]; 2913 tf->lbah = cdb[7]; 2914 tf->device = cdb[8]; 2915 tf->command = cdb[9]; 2916 } else { 2917 /* 2918 * 32-byte CDB - may contain extended command fields. 2919 * 2920 * If that is the case, copy the upper byte register values. 2921 */ 2922 if (cdb[10] & 0x01) { 2923 tf->hob_feature = cdb[20]; 2924 tf->hob_nsect = cdb[22]; 2925 tf->hob_lbal = cdb[16]; 2926 tf->hob_lbam = cdb[15]; 2927 tf->hob_lbah = cdb[14]; 2928 tf->flags |= ATA_TFLAG_LBA48; 2929 } else 2930 tf->flags &= ~ATA_TFLAG_LBA48; 2931 2932 tf->feature = cdb[21]; 2933 tf->nsect = cdb[23]; 2934 tf->lbal = cdb[19]; 2935 tf->lbam = cdb[18]; 2936 tf->lbah = cdb[17]; 2937 tf->device = cdb[24]; 2938 tf->command = cdb[25]; 2939 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2940 } 2941 2942 /* For NCQ commands copy the tag value */ 2943 if (ata_is_ncq(tf->protocol)) 2944 tf->nsect = qc->hw_tag << 3; 2945 2946 /* enforce correct master/slave bit */ 2947 tf->device = dev->devno ? 2948 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2949 2950 switch (tf->command) { 2951 /* READ/WRITE LONG use a non-standard sect_size */ 2952 case ATA_CMD_READ_LONG: 2953 case ATA_CMD_READ_LONG_ONCE: 2954 case ATA_CMD_WRITE_LONG: 2955 case ATA_CMD_WRITE_LONG_ONCE: 2956 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 2957 fp = 1; 2958 goto invalid_fld; 2959 } 2960 qc->sect_size = scsi_bufflen(scmd); 2961 break; 2962 2963 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2964 case ATA_CMD_CFA_WRITE_NE: 2965 case ATA_CMD_CFA_TRANS_SECT: 2966 case ATA_CMD_CFA_WRITE_MULT_NE: 2967 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2968 case ATA_CMD_READ: 2969 case ATA_CMD_READ_EXT: 2970 case ATA_CMD_READ_QUEUED: 2971 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2972 case ATA_CMD_FPDMA_READ: 2973 case ATA_CMD_READ_MULTI: 2974 case ATA_CMD_READ_MULTI_EXT: 2975 case ATA_CMD_PIO_READ: 2976 case ATA_CMD_PIO_READ_EXT: 2977 case ATA_CMD_READ_STREAM_DMA_EXT: 2978 case ATA_CMD_READ_STREAM_EXT: 2979 case ATA_CMD_VERIFY: 2980 case ATA_CMD_VERIFY_EXT: 2981 case ATA_CMD_WRITE: 2982 case ATA_CMD_WRITE_EXT: 2983 case ATA_CMD_WRITE_FUA_EXT: 2984 case ATA_CMD_WRITE_QUEUED: 2985 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2986 case ATA_CMD_FPDMA_WRITE: 2987 case ATA_CMD_WRITE_MULTI: 2988 case ATA_CMD_WRITE_MULTI_EXT: 2989 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2990 case ATA_CMD_PIO_WRITE: 2991 case ATA_CMD_PIO_WRITE_EXT: 2992 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2993 case ATA_CMD_WRITE_STREAM_EXT: 2994 qc->sect_size = scmd->device->sector_size; 2995 break; 2996 2997 /* Everything else uses 512 byte "sectors" */ 2998 default: 2999 qc->sect_size = ATA_SECT_SIZE; 3000 } 3001 3002 /* 3003 * Set flags so that all registers will be written, pass on 3004 * write indication (used for PIO/DMA setup), result TF is 3005 * copied back and we don't whine too much about its failure. 3006 */ 3007 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3008 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3009 tf->flags |= ATA_TFLAG_WRITE; 3010 3011 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3012 3013 /* 3014 * Set transfer length. 3015 * 3016 * TODO: find out if we need to do more here to 3017 * cover scatter/gather case. 3018 */ 3019 ata_qc_set_pc_nbytes(qc); 3020 3021 /* We may not issue DMA commands if no DMA mode is set */ 3022 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3023 fp = 1; 3024 goto invalid_fld; 3025 } 3026 3027 /* We may not issue NCQ commands to devices not supporting NCQ */ 3028 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3029 fp = 1; 3030 goto invalid_fld; 3031 } 3032 3033 /* sanity check for pio multi commands */ 3034 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3035 fp = 1; 3036 goto invalid_fld; 3037 } 3038 3039 if (is_multi_taskfile(tf)) { 3040 unsigned int multi_count = 1 << (cdb[1] >> 5); 3041 3042 /* compare the passed through multi_count 3043 * with the cached multi_count of libata 3044 */ 3045 if (multi_count != dev->multi_count) 3046 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3047 multi_count); 3048 } 3049 3050 /* 3051 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3052 * SET_FEATURES - XFER MODE must be preceded/succeeded 3053 * by an update to hardware-specific registers for each 3054 * controller (i.e. the reason for ->set_piomode(), 3055 * ->set_dmamode(), and ->post_set_mode() hooks). 3056 */ 3057 if (tf->command == ATA_CMD_SET_FEATURES && 3058 tf->feature == SETFEATURES_XFER) { 3059 fp = (cdb[0] == ATA_16) ? 4 : 3; 3060 goto invalid_fld; 3061 } 3062 3063 /* 3064 * Filter TPM commands by default. These provide an 3065 * essentially uncontrolled encrypted "back door" between 3066 * applications and the disk. Set libata.allow_tpm=1 if you 3067 * have a real reason for wanting to use them. This ensures 3068 * that installed software cannot easily mess stuff up without 3069 * user intent. DVR type users will probably ship with this enabled 3070 * for movie content management. 3071 * 3072 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3073 * for this and should do in future but that it is not sufficient as 3074 * DCS is an optional feature set. Thus we also do the software filter 3075 * so that we comply with the TC consortium stated goal that the user 3076 * can turn off TC features of their system. 3077 */ 3078 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3079 fp = (cdb[0] == ATA_16) ? 14 : 9; 3080 goto invalid_fld; 3081 } 3082 3083 return 0; 3084 3085 invalid_fld: 3086 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3087 return 1; 3088 } 3089 3090 /** 3091 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3092 * @cmd: SCSI command being translated 3093 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3094 * @sector: Starting sector 3095 * @count: Total Range of request in logical sectors 3096 * 3097 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3098 * descriptor. 3099 * 3100 * Upto 64 entries of the format: 3101 * 63:48 Range Length 3102 * 47:0 LBA 3103 * 3104 * Range Length of 0 is ignored. 3105 * LBA's should be sorted order and not overlap. 3106 * 3107 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3108 * 3109 * Return: Number of bytes copied into sglist. 3110 */ 3111 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3112 u64 sector, u32 count) 3113 { 3114 struct scsi_device *sdp = cmd->device; 3115 size_t len = sdp->sector_size; 3116 size_t r; 3117 __le64 *buf; 3118 u32 i = 0; 3119 unsigned long flags; 3120 3121 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3122 3123 if (len > ATA_SCSI_RBUF_SIZE) 3124 len = ATA_SCSI_RBUF_SIZE; 3125 3126 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3127 buf = ((void *)ata_scsi_rbuf); 3128 memset(buf, 0, len); 3129 while (i < trmax) { 3130 u64 entry = sector | 3131 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3132 buf[i++] = __cpu_to_le64(entry); 3133 if (count <= 0xffff) 3134 break; 3135 count -= 0xffff; 3136 sector += 0xffff; 3137 } 3138 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3139 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3140 3141 return r; 3142 } 3143 3144 /** 3145 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3146 * @qc: Command to be translated 3147 * 3148 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3149 * an SCT Write Same command. 3150 * Based on WRITE SAME has the UNMAP flag: 3151 * 3152 * - When set translate to DSM TRIM 3153 * - When clear translate to SCT Write Same 3154 */ 3155 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3156 { 3157 struct ata_taskfile *tf = &qc->tf; 3158 struct scsi_cmnd *scmd = qc->scsicmd; 3159 struct scsi_device *sdp = scmd->device; 3160 size_t len = sdp->sector_size; 3161 struct ata_device *dev = qc->dev; 3162 const u8 *cdb = scmd->cmnd; 3163 u64 block; 3164 u32 n_block; 3165 const u32 trmax = len >> 3; 3166 u32 size; 3167 u16 fp; 3168 u8 bp = 0xff; 3169 u8 unmap = cdb[1] & 0x8; 3170 3171 /* we may not issue DMA commands if no DMA mode is set */ 3172 if (unlikely(!dev->dma_mode)) 3173 goto invalid_opcode; 3174 3175 /* 3176 * We only allow sending this command through the block layer, 3177 * as it modifies the DATA OUT buffer, which would corrupt user 3178 * memory for SG_IO commands. 3179 */ 3180 if (unlikely(blk_rq_is_passthrough(scmd->request))) 3181 goto invalid_opcode; 3182 3183 if (unlikely(scmd->cmd_len < 16)) { 3184 fp = 15; 3185 goto invalid_fld; 3186 } 3187 scsi_16_lba_len(cdb, &block, &n_block); 3188 3189 if (!unmap || 3190 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3191 !ata_id_has_trim(dev->id)) { 3192 fp = 1; 3193 bp = 3; 3194 goto invalid_fld; 3195 } 3196 /* If the request is too large the cmd is invalid */ 3197 if (n_block > 0xffff * trmax) { 3198 fp = 2; 3199 goto invalid_fld; 3200 } 3201 3202 /* 3203 * WRITE SAME always has a sector sized buffer as payload, this 3204 * should never be a multiple entry S/G list. 3205 */ 3206 if (!scsi_sg_count(scmd)) 3207 goto invalid_param_len; 3208 3209 /* 3210 * size must match sector size in bytes 3211 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3212 * is defined as number of 512 byte blocks to be transferred. 3213 */ 3214 3215 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3216 if (size != len) 3217 goto invalid_param_len; 3218 3219 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3220 /* Newer devices support queued TRIM commands */ 3221 tf->protocol = ATA_PROT_NCQ; 3222 tf->command = ATA_CMD_FPDMA_SEND; 3223 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3224 tf->nsect = qc->hw_tag << 3; 3225 tf->hob_feature = (size / 512) >> 8; 3226 tf->feature = size / 512; 3227 3228 tf->auxiliary = 1; 3229 } else { 3230 tf->protocol = ATA_PROT_DMA; 3231 tf->hob_feature = 0; 3232 tf->feature = ATA_DSM_TRIM; 3233 tf->hob_nsect = (size / 512) >> 8; 3234 tf->nsect = size / 512; 3235 tf->command = ATA_CMD_DSM; 3236 } 3237 3238 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3239 ATA_TFLAG_WRITE; 3240 3241 ata_qc_set_pc_nbytes(qc); 3242 3243 return 0; 3244 3245 invalid_fld: 3246 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3247 return 1; 3248 invalid_param_len: 3249 /* "Parameter list length error" */ 3250 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3251 return 1; 3252 invalid_opcode: 3253 /* "Invalid command operation code" */ 3254 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3255 return 1; 3256 } 3257 3258 /** 3259 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3260 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3261 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3262 * 3263 * Yields a subset to satisfy scsi_report_opcode() 3264 * 3265 * LOCKING: 3266 * spin_lock_irqsave(host lock) 3267 */ 3268 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3269 { 3270 struct ata_device *dev = args->dev; 3271 u8 *cdb = args->cmd->cmnd; 3272 u8 supported = 0; 3273 unsigned int err = 0; 3274 3275 if (cdb[2] != 1) { 3276 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3277 err = 2; 3278 goto out; 3279 } 3280 switch (cdb[3]) { 3281 case INQUIRY: 3282 case MODE_SENSE: 3283 case MODE_SENSE_10: 3284 case READ_CAPACITY: 3285 case SERVICE_ACTION_IN_16: 3286 case REPORT_LUNS: 3287 case REQUEST_SENSE: 3288 case SYNCHRONIZE_CACHE: 3289 case REZERO_UNIT: 3290 case SEEK_6: 3291 case SEEK_10: 3292 case TEST_UNIT_READY: 3293 case SEND_DIAGNOSTIC: 3294 case MAINTENANCE_IN: 3295 case READ_6: 3296 case READ_10: 3297 case READ_16: 3298 case WRITE_6: 3299 case WRITE_10: 3300 case WRITE_16: 3301 case ATA_12: 3302 case ATA_16: 3303 case VERIFY: 3304 case VERIFY_16: 3305 case MODE_SELECT: 3306 case MODE_SELECT_10: 3307 case START_STOP: 3308 supported = 3; 3309 break; 3310 case ZBC_IN: 3311 case ZBC_OUT: 3312 if (ata_id_zoned_cap(dev->id) || 3313 dev->class == ATA_DEV_ZAC) 3314 supported = 3; 3315 break; 3316 case SECURITY_PROTOCOL_IN: 3317 case SECURITY_PROTOCOL_OUT: 3318 if (dev->flags & ATA_DFLAG_TRUSTED) 3319 supported = 3; 3320 break; 3321 default: 3322 break; 3323 } 3324 out: 3325 rbuf[1] = supported; /* supported */ 3326 return err; 3327 } 3328 3329 /** 3330 * ata_scsi_report_zones_complete - convert ATA output 3331 * @qc: command structure returning the data 3332 * 3333 * Convert T-13 little-endian field representation into 3334 * T-10 big-endian field representation. 3335 * What a mess. 3336 */ 3337 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3338 { 3339 struct scsi_cmnd *scmd = qc->scsicmd; 3340 struct sg_mapping_iter miter; 3341 unsigned long flags; 3342 unsigned int bytes = 0; 3343 3344 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3345 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3346 3347 local_irq_save(flags); 3348 while (sg_miter_next(&miter)) { 3349 unsigned int offset = 0; 3350 3351 if (bytes == 0) { 3352 char *hdr; 3353 u32 list_length; 3354 u64 max_lba, opt_lba; 3355 u16 same; 3356 3357 /* Swizzle header */ 3358 hdr = miter.addr; 3359 list_length = get_unaligned_le32(&hdr[0]); 3360 same = get_unaligned_le16(&hdr[4]); 3361 max_lba = get_unaligned_le64(&hdr[8]); 3362 opt_lba = get_unaligned_le64(&hdr[16]); 3363 put_unaligned_be32(list_length, &hdr[0]); 3364 hdr[4] = same & 0xf; 3365 put_unaligned_be64(max_lba, &hdr[8]); 3366 put_unaligned_be64(opt_lba, &hdr[16]); 3367 offset += 64; 3368 bytes += 64; 3369 } 3370 while (offset < miter.length) { 3371 char *rec; 3372 u8 cond, type, non_seq, reset; 3373 u64 size, start, wp; 3374 3375 /* Swizzle zone descriptor */ 3376 rec = miter.addr + offset; 3377 type = rec[0] & 0xf; 3378 cond = (rec[1] >> 4) & 0xf; 3379 non_seq = (rec[1] & 2); 3380 reset = (rec[1] & 1); 3381 size = get_unaligned_le64(&rec[8]); 3382 start = get_unaligned_le64(&rec[16]); 3383 wp = get_unaligned_le64(&rec[24]); 3384 rec[0] = type; 3385 rec[1] = (cond << 4) | non_seq | reset; 3386 put_unaligned_be64(size, &rec[8]); 3387 put_unaligned_be64(start, &rec[16]); 3388 put_unaligned_be64(wp, &rec[24]); 3389 WARN_ON(offset + 64 > miter.length); 3390 offset += 64; 3391 bytes += 64; 3392 } 3393 } 3394 sg_miter_stop(&miter); 3395 local_irq_restore(flags); 3396 3397 ata_scsi_qc_complete(qc); 3398 } 3399 3400 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3401 { 3402 struct ata_taskfile *tf = &qc->tf; 3403 struct scsi_cmnd *scmd = qc->scsicmd; 3404 const u8 *cdb = scmd->cmnd; 3405 u16 sect, fp = (u16)-1; 3406 u8 sa, options, bp = 0xff; 3407 u64 block; 3408 u32 n_block; 3409 3410 if (unlikely(scmd->cmd_len < 16)) { 3411 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3412 scmd->cmd_len); 3413 fp = 15; 3414 goto invalid_fld; 3415 } 3416 scsi_16_lba_len(cdb, &block, &n_block); 3417 if (n_block != scsi_bufflen(scmd)) { 3418 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3419 n_block, scsi_bufflen(scmd)); 3420 goto invalid_param_len; 3421 } 3422 sa = cdb[1] & 0x1f; 3423 if (sa != ZI_REPORT_ZONES) { 3424 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3425 fp = 1; 3426 goto invalid_fld; 3427 } 3428 /* 3429 * ZAC allows only for transfers in 512 byte blocks, 3430 * and uses a 16 bit value for the transfer count. 3431 */ 3432 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3433 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3434 goto invalid_param_len; 3435 } 3436 sect = n_block / 512; 3437 options = cdb[14] & 0xbf; 3438 3439 if (ata_ncq_enabled(qc->dev) && 3440 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3441 tf->protocol = ATA_PROT_NCQ; 3442 tf->command = ATA_CMD_FPDMA_RECV; 3443 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3444 tf->nsect = qc->hw_tag << 3; 3445 tf->feature = sect & 0xff; 3446 tf->hob_feature = (sect >> 8) & 0xff; 3447 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3448 } else { 3449 tf->command = ATA_CMD_ZAC_MGMT_IN; 3450 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3451 tf->protocol = ATA_PROT_DMA; 3452 tf->hob_feature = options; 3453 tf->hob_nsect = (sect >> 8) & 0xff; 3454 tf->nsect = sect & 0xff; 3455 } 3456 tf->device = ATA_LBA; 3457 tf->lbah = (block >> 16) & 0xff; 3458 tf->lbam = (block >> 8) & 0xff; 3459 tf->lbal = block & 0xff; 3460 tf->hob_lbah = (block >> 40) & 0xff; 3461 tf->hob_lbam = (block >> 32) & 0xff; 3462 tf->hob_lbal = (block >> 24) & 0xff; 3463 3464 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3465 qc->flags |= ATA_QCFLAG_RESULT_TF; 3466 3467 ata_qc_set_pc_nbytes(qc); 3468 3469 qc->complete_fn = ata_scsi_report_zones_complete; 3470 3471 return 0; 3472 3473 invalid_fld: 3474 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3475 return 1; 3476 3477 invalid_param_len: 3478 /* "Parameter list length error" */ 3479 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3480 return 1; 3481 } 3482 3483 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3484 { 3485 struct ata_taskfile *tf = &qc->tf; 3486 struct scsi_cmnd *scmd = qc->scsicmd; 3487 struct ata_device *dev = qc->dev; 3488 const u8 *cdb = scmd->cmnd; 3489 u8 all, sa; 3490 u64 block; 3491 u32 n_block; 3492 u16 fp = (u16)-1; 3493 3494 if (unlikely(scmd->cmd_len < 16)) { 3495 fp = 15; 3496 goto invalid_fld; 3497 } 3498 3499 sa = cdb[1] & 0x1f; 3500 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3501 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3502 fp = 1; 3503 goto invalid_fld; 3504 } 3505 3506 scsi_16_lba_len(cdb, &block, &n_block); 3507 if (n_block) { 3508 /* 3509 * ZAC MANAGEMENT OUT doesn't define any length 3510 */ 3511 goto invalid_param_len; 3512 } 3513 3514 all = cdb[14] & 0x1; 3515 if (all) { 3516 /* 3517 * Ignore the block address (zone ID) as defined by ZBC. 3518 */ 3519 block = 0; 3520 } else if (block >= dev->n_sectors) { 3521 /* 3522 * Block must be a valid zone ID (a zone start LBA). 3523 */ 3524 fp = 2; 3525 goto invalid_fld; 3526 } 3527 3528 if (ata_ncq_enabled(qc->dev) && 3529 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3530 tf->protocol = ATA_PROT_NCQ_NODATA; 3531 tf->command = ATA_CMD_NCQ_NON_DATA; 3532 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3533 tf->nsect = qc->hw_tag << 3; 3534 tf->auxiliary = sa | ((u16)all << 8); 3535 } else { 3536 tf->protocol = ATA_PROT_NODATA; 3537 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3538 tf->feature = sa; 3539 tf->hob_feature = all; 3540 } 3541 tf->lbah = (block >> 16) & 0xff; 3542 tf->lbam = (block >> 8) & 0xff; 3543 tf->lbal = block & 0xff; 3544 tf->hob_lbah = (block >> 40) & 0xff; 3545 tf->hob_lbam = (block >> 32) & 0xff; 3546 tf->hob_lbal = (block >> 24) & 0xff; 3547 tf->device = ATA_LBA; 3548 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3549 3550 return 0; 3551 3552 invalid_fld: 3553 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3554 return 1; 3555 invalid_param_len: 3556 /* "Parameter list length error" */ 3557 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3558 return 1; 3559 } 3560 3561 /** 3562 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3563 * @qc: Storage for translated ATA taskfile 3564 * @buf: input buffer 3565 * @len: number of valid bytes in the input buffer 3566 * @fp: out parameter for the failed field on error 3567 * 3568 * Prepare a taskfile to modify caching information for the device. 3569 * 3570 * LOCKING: 3571 * None. 3572 */ 3573 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3574 const u8 *buf, int len, u16 *fp) 3575 { 3576 struct ata_taskfile *tf = &qc->tf; 3577 struct ata_device *dev = qc->dev; 3578 u8 mpage[CACHE_MPAGE_LEN]; 3579 u8 wce; 3580 int i; 3581 3582 /* 3583 * The first two bytes of def_cache_mpage are a header, so offsets 3584 * in mpage are off by 2 compared to buf. Same for len. 3585 */ 3586 3587 if (len != CACHE_MPAGE_LEN - 2) { 3588 if (len < CACHE_MPAGE_LEN - 2) 3589 *fp = len; 3590 else 3591 *fp = CACHE_MPAGE_LEN - 2; 3592 return -EINVAL; 3593 } 3594 3595 wce = buf[0] & (1 << 2); 3596 3597 /* 3598 * Check that read-only bits are not modified. 3599 */ 3600 ata_msense_caching(dev->id, mpage, false); 3601 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3602 if (i == 0) 3603 continue; 3604 if (mpage[i + 2] != buf[i]) { 3605 *fp = i; 3606 return -EINVAL; 3607 } 3608 } 3609 3610 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3611 tf->protocol = ATA_PROT_NODATA; 3612 tf->nsect = 0; 3613 tf->command = ATA_CMD_SET_FEATURES; 3614 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3615 return 0; 3616 } 3617 3618 /** 3619 * ata_mselect_control - Simulate MODE SELECT for control page 3620 * @qc: Storage for translated ATA taskfile 3621 * @buf: input buffer 3622 * @len: number of valid bytes in the input buffer 3623 * @fp: out parameter for the failed field on error 3624 * 3625 * Prepare a taskfile to modify caching information for the device. 3626 * 3627 * LOCKING: 3628 * None. 3629 */ 3630 static int ata_mselect_control(struct ata_queued_cmd *qc, 3631 const u8 *buf, int len, u16 *fp) 3632 { 3633 struct ata_device *dev = qc->dev; 3634 u8 mpage[CONTROL_MPAGE_LEN]; 3635 u8 d_sense; 3636 int i; 3637 3638 /* 3639 * The first two bytes of def_control_mpage are a header, so offsets 3640 * in mpage are off by 2 compared to buf. Same for len. 3641 */ 3642 3643 if (len != CONTROL_MPAGE_LEN - 2) { 3644 if (len < CONTROL_MPAGE_LEN - 2) 3645 *fp = len; 3646 else 3647 *fp = CONTROL_MPAGE_LEN - 2; 3648 return -EINVAL; 3649 } 3650 3651 d_sense = buf[0] & (1 << 2); 3652 3653 /* 3654 * Check that read-only bits are not modified. 3655 */ 3656 ata_msense_control(dev, mpage, false); 3657 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3658 if (i == 0) 3659 continue; 3660 if (mpage[2 + i] != buf[i]) { 3661 *fp = i; 3662 return -EINVAL; 3663 } 3664 } 3665 if (d_sense & (1 << 2)) 3666 dev->flags |= ATA_DFLAG_D_SENSE; 3667 else 3668 dev->flags &= ~ATA_DFLAG_D_SENSE; 3669 return 0; 3670 } 3671 3672 /** 3673 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3674 * @qc: Storage for translated ATA taskfile 3675 * 3676 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3677 * Assume this is invoked for direct access devices (e.g. disks) only. 3678 * There should be no block descriptor for other device types. 3679 * 3680 * LOCKING: 3681 * spin_lock_irqsave(host lock) 3682 */ 3683 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3684 { 3685 struct scsi_cmnd *scmd = qc->scsicmd; 3686 const u8 *cdb = scmd->cmnd; 3687 u8 pg, spg; 3688 unsigned six_byte, pg_len, hdr_len, bd_len; 3689 int len; 3690 u16 fp = (u16)-1; 3691 u8 bp = 0xff; 3692 u8 buffer[64]; 3693 const u8 *p = buffer; 3694 3695 VPRINTK("ENTER\n"); 3696 3697 six_byte = (cdb[0] == MODE_SELECT); 3698 if (six_byte) { 3699 if (scmd->cmd_len < 5) { 3700 fp = 4; 3701 goto invalid_fld; 3702 } 3703 3704 len = cdb[4]; 3705 hdr_len = 4; 3706 } else { 3707 if (scmd->cmd_len < 9) { 3708 fp = 8; 3709 goto invalid_fld; 3710 } 3711 3712 len = (cdb[7] << 8) + cdb[8]; 3713 hdr_len = 8; 3714 } 3715 3716 /* We only support PF=1, SP=0. */ 3717 if ((cdb[1] & 0x11) != 0x10) { 3718 fp = 1; 3719 bp = (cdb[1] & 0x01) ? 1 : 5; 3720 goto invalid_fld; 3721 } 3722 3723 /* Test early for possible overrun. */ 3724 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3725 goto invalid_param_len; 3726 3727 /* Move past header and block descriptors. */ 3728 if (len < hdr_len) 3729 goto invalid_param_len; 3730 3731 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3732 buffer, sizeof(buffer))) 3733 goto invalid_param_len; 3734 3735 if (six_byte) 3736 bd_len = p[3]; 3737 else 3738 bd_len = (p[6] << 8) + p[7]; 3739 3740 len -= hdr_len; 3741 p += hdr_len; 3742 if (len < bd_len) 3743 goto invalid_param_len; 3744 if (bd_len != 0 && bd_len != 8) { 3745 fp = (six_byte) ? 3 : 6; 3746 fp += bd_len + hdr_len; 3747 goto invalid_param; 3748 } 3749 3750 len -= bd_len; 3751 p += bd_len; 3752 if (len == 0) 3753 goto skip; 3754 3755 /* Parse both possible formats for the mode page headers. */ 3756 pg = p[0] & 0x3f; 3757 if (p[0] & 0x40) { 3758 if (len < 4) 3759 goto invalid_param_len; 3760 3761 spg = p[1]; 3762 pg_len = (p[2] << 8) | p[3]; 3763 p += 4; 3764 len -= 4; 3765 } else { 3766 if (len < 2) 3767 goto invalid_param_len; 3768 3769 spg = 0; 3770 pg_len = p[1]; 3771 p += 2; 3772 len -= 2; 3773 } 3774 3775 /* 3776 * No mode subpages supported (yet) but asking for _all_ 3777 * subpages may be valid 3778 */ 3779 if (spg && (spg != ALL_SUB_MPAGES)) { 3780 fp = (p[0] & 0x40) ? 1 : 0; 3781 fp += hdr_len + bd_len; 3782 goto invalid_param; 3783 } 3784 if (pg_len > len) 3785 goto invalid_param_len; 3786 3787 switch (pg) { 3788 case CACHE_MPAGE: 3789 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3790 fp += hdr_len + bd_len; 3791 goto invalid_param; 3792 } 3793 break; 3794 case CONTROL_MPAGE: 3795 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 3796 fp += hdr_len + bd_len; 3797 goto invalid_param; 3798 } else { 3799 goto skip; /* No ATA command to send */ 3800 } 3801 break; 3802 default: /* invalid page code */ 3803 fp = bd_len + hdr_len; 3804 goto invalid_param; 3805 } 3806 3807 /* 3808 * Only one page has changeable data, so we only support setting one 3809 * page at a time. 3810 */ 3811 if (len > pg_len) 3812 goto invalid_param; 3813 3814 return 0; 3815 3816 invalid_fld: 3817 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3818 return 1; 3819 3820 invalid_param: 3821 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3822 return 1; 3823 3824 invalid_param_len: 3825 /* "Parameter list length error" */ 3826 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3827 return 1; 3828 3829 skip: 3830 scmd->result = SAM_STAT_GOOD; 3831 return 1; 3832 } 3833 3834 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3835 { 3836 if (len == 0) 3837 return ATA_CMD_TRUSTED_NONDATA; 3838 else if (send) 3839 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 3840 else 3841 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 3842 } 3843 3844 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 3845 { 3846 struct scsi_cmnd *scmd = qc->scsicmd; 3847 const u8 *cdb = scmd->cmnd; 3848 struct ata_taskfile *tf = &qc->tf; 3849 u8 secp = cdb[1]; 3850 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 3851 u16 spsp = get_unaligned_be16(&cdb[2]); 3852 u32 len = get_unaligned_be32(&cdb[6]); 3853 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 3854 3855 /* 3856 * We don't support the ATA "security" protocol. 3857 */ 3858 if (secp == 0xef) { 3859 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 3860 return 1; 3861 } 3862 3863 if (cdb[4] & 7) { /* INC_512 */ 3864 if (len > 0xffff) { 3865 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3866 return 1; 3867 } 3868 } else { 3869 if (len > 0x01fffe00) { 3870 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3871 return 1; 3872 } 3873 3874 /* convert to the sector-based ATA addressing */ 3875 len = (len + 511) / 512; 3876 } 3877 3878 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 3879 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 3880 if (send) 3881 tf->flags |= ATA_TFLAG_WRITE; 3882 tf->command = ata_scsi_trusted_op(len, send, dma); 3883 tf->feature = secp; 3884 tf->lbam = spsp & 0xff; 3885 tf->lbah = spsp >> 8; 3886 3887 if (len) { 3888 tf->nsect = len & 0xff; 3889 tf->lbal = len >> 8; 3890 } else { 3891 if (!send) 3892 tf->lbah = (1 << 7); 3893 } 3894 3895 ata_qc_set_pc_nbytes(qc); 3896 return 0; 3897 } 3898 3899 /** 3900 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 3901 * @qc: Command to be translated 3902 * 3903 * Translate a SCSI variable length CDB to specified commands. 3904 * It checks a service action value in CDB to call corresponding handler. 3905 * 3906 * RETURNS: 3907 * Zero on success, non-zero on failure 3908 * 3909 */ 3910 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 3911 { 3912 struct scsi_cmnd *scmd = qc->scsicmd; 3913 const u8 *cdb = scmd->cmnd; 3914 const u16 sa = get_unaligned_be16(&cdb[8]); 3915 3916 /* 3917 * if service action represents a ata pass-thru(32) command, 3918 * then pass it to ata_scsi_pass_thru handler. 3919 */ 3920 if (sa == ATA_32) 3921 return ata_scsi_pass_thru(qc); 3922 3923 /* unsupported service action */ 3924 return 1; 3925 } 3926 3927 /** 3928 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3929 * @dev: ATA device 3930 * @cmd: SCSI command opcode to consider 3931 * 3932 * Look up the SCSI command given, and determine whether the 3933 * SCSI command is to be translated or simulated. 3934 * 3935 * RETURNS: 3936 * Pointer to translation function if possible, %NULL if not. 3937 */ 3938 3939 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3940 { 3941 switch (cmd) { 3942 case READ_6: 3943 case READ_10: 3944 case READ_16: 3945 3946 case WRITE_6: 3947 case WRITE_10: 3948 case WRITE_16: 3949 return ata_scsi_rw_xlat; 3950 3951 case WRITE_SAME_16: 3952 return ata_scsi_write_same_xlat; 3953 3954 case SYNCHRONIZE_CACHE: 3955 if (ata_try_flush_cache(dev)) 3956 return ata_scsi_flush_xlat; 3957 break; 3958 3959 case VERIFY: 3960 case VERIFY_16: 3961 return ata_scsi_verify_xlat; 3962 3963 case ATA_12: 3964 case ATA_16: 3965 return ata_scsi_pass_thru; 3966 3967 case VARIABLE_LENGTH_CMD: 3968 return ata_scsi_var_len_cdb_xlat; 3969 3970 case MODE_SELECT: 3971 case MODE_SELECT_10: 3972 return ata_scsi_mode_select_xlat; 3973 break; 3974 3975 case ZBC_IN: 3976 return ata_scsi_zbc_in_xlat; 3977 3978 case ZBC_OUT: 3979 return ata_scsi_zbc_out_xlat; 3980 3981 case SECURITY_PROTOCOL_IN: 3982 case SECURITY_PROTOCOL_OUT: 3983 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 3984 break; 3985 return ata_scsi_security_inout_xlat; 3986 3987 case START_STOP: 3988 return ata_scsi_start_stop_xlat; 3989 } 3990 3991 return NULL; 3992 } 3993 3994 /** 3995 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 3996 * @ap: ATA port to which the command was being sent 3997 * @cmd: SCSI command to dump 3998 * 3999 * Prints the contents of a SCSI command via printk(). 4000 */ 4001 4002 void ata_scsi_dump_cdb(struct ata_port *ap, struct scsi_cmnd *cmd) 4003 { 4004 #ifdef ATA_VERBOSE_DEBUG 4005 struct scsi_device *scsidev = cmd->device; 4006 4007 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n", 4008 ap->print_id, 4009 scsidev->channel, scsidev->id, scsidev->lun, 4010 cmd->cmnd); 4011 #endif 4012 } 4013 4014 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4015 { 4016 u8 scsi_op = scmd->cmnd[0]; 4017 ata_xlat_func_t xlat_func; 4018 int rc = 0; 4019 4020 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4021 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 4022 goto bad_cdb_len; 4023 4024 xlat_func = ata_get_xlat_func(dev, scsi_op); 4025 } else { 4026 if (unlikely(!scmd->cmd_len)) 4027 goto bad_cdb_len; 4028 4029 xlat_func = NULL; 4030 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4031 /* relay SCSI command to ATAPI device */ 4032 int len = COMMAND_SIZE(scsi_op); 4033 if (unlikely(len > scmd->cmd_len || 4034 len > dev->cdb_len || 4035 scmd->cmd_len > ATAPI_CDB_LEN)) 4036 goto bad_cdb_len; 4037 4038 xlat_func = atapi_xlat; 4039 } else { 4040 /* ATA_16 passthru, treat as an ATA command */ 4041 if (unlikely(scmd->cmd_len > 16)) 4042 goto bad_cdb_len; 4043 4044 xlat_func = ata_get_xlat_func(dev, scsi_op); 4045 } 4046 } 4047 4048 if (xlat_func) 4049 rc = ata_scsi_translate(dev, scmd, xlat_func); 4050 else 4051 ata_scsi_simulate(dev, scmd); 4052 4053 return rc; 4054 4055 bad_cdb_len: 4056 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4057 scmd->cmd_len, scsi_op, dev->cdb_len); 4058 scmd->result = DID_ERROR << 16; 4059 scmd->scsi_done(scmd); 4060 return 0; 4061 } 4062 4063 /** 4064 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4065 * @shost: SCSI host of command to be sent 4066 * @cmd: SCSI command to be sent 4067 * 4068 * In some cases, this function translates SCSI commands into 4069 * ATA taskfiles, and queues the taskfiles to be sent to 4070 * hardware. In other cases, this function simulates a 4071 * SCSI device by evaluating and responding to certain 4072 * SCSI commands. This creates the overall effect of 4073 * ATA and ATAPI devices appearing as SCSI devices. 4074 * 4075 * LOCKING: 4076 * ATA host lock 4077 * 4078 * RETURNS: 4079 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4080 * 0 otherwise. 4081 */ 4082 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4083 { 4084 struct ata_port *ap; 4085 struct ata_device *dev; 4086 struct scsi_device *scsidev = cmd->device; 4087 int rc = 0; 4088 unsigned long irq_flags; 4089 4090 ap = ata_shost_to_port(shost); 4091 4092 spin_lock_irqsave(ap->lock, irq_flags); 4093 4094 ata_scsi_dump_cdb(ap, cmd); 4095 4096 dev = ata_scsi_find_dev(ap, scsidev); 4097 if (likely(dev)) 4098 rc = __ata_scsi_queuecmd(cmd, dev); 4099 else { 4100 cmd->result = (DID_BAD_TARGET << 16); 4101 cmd->scsi_done(cmd); 4102 } 4103 4104 spin_unlock_irqrestore(ap->lock, irq_flags); 4105 4106 return rc; 4107 } 4108 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4109 4110 /** 4111 * ata_scsi_simulate - simulate SCSI command on ATA device 4112 * @dev: the target device 4113 * @cmd: SCSI command being sent to device. 4114 * 4115 * Interprets and directly executes a select list of SCSI commands 4116 * that can be handled internally. 4117 * 4118 * LOCKING: 4119 * spin_lock_irqsave(host lock) 4120 */ 4121 4122 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4123 { 4124 struct ata_scsi_args args; 4125 const u8 *scsicmd = cmd->cmnd; 4126 u8 tmp8; 4127 4128 args.dev = dev; 4129 args.id = dev->id; 4130 args.cmd = cmd; 4131 4132 switch(scsicmd[0]) { 4133 case INQUIRY: 4134 if (scsicmd[1] & 2) /* is CmdDt set? */ 4135 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4136 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4137 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4138 else switch (scsicmd[2]) { 4139 case 0x00: 4140 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4141 break; 4142 case 0x80: 4143 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4144 break; 4145 case 0x83: 4146 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4147 break; 4148 case 0x89: 4149 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4150 break; 4151 case 0xb0: 4152 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4153 break; 4154 case 0xb1: 4155 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4156 break; 4157 case 0xb2: 4158 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4159 break; 4160 case 0xb6: 4161 if (dev->flags & ATA_DFLAG_ZAC) { 4162 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4163 break; 4164 } 4165 /* Fallthrough */ 4166 default: 4167 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4168 break; 4169 } 4170 break; 4171 4172 case MODE_SENSE: 4173 case MODE_SENSE_10: 4174 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4175 break; 4176 4177 case READ_CAPACITY: 4178 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4179 break; 4180 4181 case SERVICE_ACTION_IN_16: 4182 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4183 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4184 else 4185 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4186 break; 4187 4188 case REPORT_LUNS: 4189 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4190 break; 4191 4192 case REQUEST_SENSE: 4193 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4194 cmd->result = (DRIVER_SENSE << 24); 4195 break; 4196 4197 /* if we reach this, then writeback caching is disabled, 4198 * turning this into a no-op. 4199 */ 4200 case SYNCHRONIZE_CACHE: 4201 /* fall through */ 4202 4203 /* no-op's, complete with success */ 4204 case REZERO_UNIT: 4205 case SEEK_6: 4206 case SEEK_10: 4207 case TEST_UNIT_READY: 4208 break; 4209 4210 case SEND_DIAGNOSTIC: 4211 tmp8 = scsicmd[1] & ~(1 << 3); 4212 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4213 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4214 break; 4215 4216 case MAINTENANCE_IN: 4217 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4218 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4219 else 4220 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4221 break; 4222 4223 /* all other commands */ 4224 default: 4225 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4226 /* "Invalid command operation code" */ 4227 break; 4228 } 4229 4230 cmd->scsi_done(cmd); 4231 } 4232 4233 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4234 { 4235 int i, rc; 4236 4237 for (i = 0; i < host->n_ports; i++) { 4238 struct ata_port *ap = host->ports[i]; 4239 struct Scsi_Host *shost; 4240 4241 rc = -ENOMEM; 4242 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4243 if (!shost) 4244 goto err_alloc; 4245 4246 shost->eh_noresume = 1; 4247 *(struct ata_port **)&shost->hostdata[0] = ap; 4248 ap->scsi_host = shost; 4249 4250 shost->transportt = ata_scsi_transport_template; 4251 shost->unique_id = ap->print_id; 4252 shost->max_id = 16; 4253 shost->max_lun = 1; 4254 shost->max_channel = 1; 4255 shost->max_cmd_len = 32; 4256 4257 /* Schedule policy is determined by ->qc_defer() 4258 * callback and it needs to see every deferred qc. 4259 * Set host_blocked to 1 to prevent SCSI midlayer from 4260 * automatically deferring requests. 4261 */ 4262 shost->max_host_blocked = 1; 4263 4264 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4265 if (rc) 4266 goto err_alloc; 4267 } 4268 4269 return 0; 4270 4271 err_alloc: 4272 while (--i >= 0) { 4273 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4274 4275 /* scsi_host_put() is in ata_devres_release() */ 4276 scsi_remove_host(shost); 4277 } 4278 return rc; 4279 } 4280 4281 #ifdef CONFIG_OF 4282 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4283 { 4284 struct scsi_device *sdev = dev->sdev; 4285 struct device *d = ap->host->dev; 4286 struct device_node *np = d->of_node; 4287 struct device_node *child; 4288 4289 for_each_available_child_of_node(np, child) { 4290 int ret; 4291 u32 val; 4292 4293 ret = of_property_read_u32(child, "reg", &val); 4294 if (ret) 4295 continue; 4296 if (val == dev->devno) { 4297 dev_dbg(d, "found matching device node\n"); 4298 sdev->sdev_gendev.of_node = child; 4299 return; 4300 } 4301 } 4302 } 4303 #else 4304 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4305 { 4306 } 4307 #endif 4308 4309 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4310 { 4311 int tries = 5; 4312 struct ata_device *last_failed_dev = NULL; 4313 struct ata_link *link; 4314 struct ata_device *dev; 4315 4316 repeat: 4317 ata_for_each_link(link, ap, EDGE) { 4318 ata_for_each_dev(dev, link, ENABLED) { 4319 struct scsi_device *sdev; 4320 int channel = 0, id = 0; 4321 4322 if (dev->sdev) 4323 continue; 4324 4325 if (ata_is_host_link(link)) 4326 id = dev->devno; 4327 else 4328 channel = link->pmp; 4329 4330 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4331 NULL); 4332 if (!IS_ERR(sdev)) { 4333 dev->sdev = sdev; 4334 ata_scsi_assign_ofnode(dev, ap); 4335 scsi_device_put(sdev); 4336 } else { 4337 dev->sdev = NULL; 4338 } 4339 } 4340 } 4341 4342 /* If we scanned while EH was in progress or allocation 4343 * failure occurred, scan would have failed silently. Check 4344 * whether all devices are attached. 4345 */ 4346 ata_for_each_link(link, ap, EDGE) { 4347 ata_for_each_dev(dev, link, ENABLED) { 4348 if (!dev->sdev) 4349 goto exit_loop; 4350 } 4351 } 4352 exit_loop: 4353 if (!link) 4354 return; 4355 4356 /* we're missing some SCSI devices */ 4357 if (sync) { 4358 /* If caller requested synchrnous scan && we've made 4359 * any progress, sleep briefly and repeat. 4360 */ 4361 if (dev != last_failed_dev) { 4362 msleep(100); 4363 last_failed_dev = dev; 4364 goto repeat; 4365 } 4366 4367 /* We might be failing to detect boot device, give it 4368 * a few more chances. 4369 */ 4370 if (--tries) { 4371 msleep(100); 4372 goto repeat; 4373 } 4374 4375 ata_port_err(ap, 4376 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4377 } 4378 4379 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4380 round_jiffies_relative(HZ)); 4381 } 4382 4383 /** 4384 * ata_scsi_offline_dev - offline attached SCSI device 4385 * @dev: ATA device to offline attached SCSI device for 4386 * 4387 * This function is called from ata_eh_hotplug() and responsible 4388 * for taking the SCSI device attached to @dev offline. This 4389 * function is called with host lock which protects dev->sdev 4390 * against clearing. 4391 * 4392 * LOCKING: 4393 * spin_lock_irqsave(host lock) 4394 * 4395 * RETURNS: 4396 * 1 if attached SCSI device exists, 0 otherwise. 4397 */ 4398 int ata_scsi_offline_dev(struct ata_device *dev) 4399 { 4400 if (dev->sdev) { 4401 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4402 return 1; 4403 } 4404 return 0; 4405 } 4406 4407 /** 4408 * ata_scsi_remove_dev - remove attached SCSI device 4409 * @dev: ATA device to remove attached SCSI device for 4410 * 4411 * This function is called from ata_eh_scsi_hotplug() and 4412 * responsible for removing the SCSI device attached to @dev. 4413 * 4414 * LOCKING: 4415 * Kernel thread context (may sleep). 4416 */ 4417 static void ata_scsi_remove_dev(struct ata_device *dev) 4418 { 4419 struct ata_port *ap = dev->link->ap; 4420 struct scsi_device *sdev; 4421 unsigned long flags; 4422 4423 /* Alas, we need to grab scan_mutex to ensure SCSI device 4424 * state doesn't change underneath us and thus 4425 * scsi_device_get() always succeeds. The mutex locking can 4426 * be removed if there is __scsi_device_get() interface which 4427 * increments reference counts regardless of device state. 4428 */ 4429 mutex_lock(&ap->scsi_host->scan_mutex); 4430 spin_lock_irqsave(ap->lock, flags); 4431 4432 /* clearing dev->sdev is protected by host lock */ 4433 sdev = dev->sdev; 4434 dev->sdev = NULL; 4435 4436 if (sdev) { 4437 /* If user initiated unplug races with us, sdev can go 4438 * away underneath us after the host lock and 4439 * scan_mutex are released. Hold onto it. 4440 */ 4441 if (scsi_device_get(sdev) == 0) { 4442 /* The following ensures the attached sdev is 4443 * offline on return from ata_scsi_offline_dev() 4444 * regardless it wins or loses the race 4445 * against this function. 4446 */ 4447 scsi_device_set_state(sdev, SDEV_OFFLINE); 4448 } else { 4449 WARN_ON(1); 4450 sdev = NULL; 4451 } 4452 } 4453 4454 spin_unlock_irqrestore(ap->lock, flags); 4455 mutex_unlock(&ap->scsi_host->scan_mutex); 4456 4457 if (sdev) { 4458 ata_dev_info(dev, "detaching (SCSI %s)\n", 4459 dev_name(&sdev->sdev_gendev)); 4460 4461 scsi_remove_device(sdev); 4462 scsi_device_put(sdev); 4463 } 4464 } 4465 4466 static void ata_scsi_handle_link_detach(struct ata_link *link) 4467 { 4468 struct ata_port *ap = link->ap; 4469 struct ata_device *dev; 4470 4471 ata_for_each_dev(dev, link, ALL) { 4472 unsigned long flags; 4473 4474 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4475 continue; 4476 4477 spin_lock_irqsave(ap->lock, flags); 4478 dev->flags &= ~ATA_DFLAG_DETACHED; 4479 spin_unlock_irqrestore(ap->lock, flags); 4480 4481 if (zpodd_dev_enabled(dev)) 4482 zpodd_exit(dev); 4483 4484 ata_scsi_remove_dev(dev); 4485 } 4486 } 4487 4488 /** 4489 * ata_scsi_media_change_notify - send media change event 4490 * @dev: Pointer to the disk device with media change event 4491 * 4492 * Tell the block layer to send a media change notification 4493 * event. 4494 * 4495 * LOCKING: 4496 * spin_lock_irqsave(host lock) 4497 */ 4498 void ata_scsi_media_change_notify(struct ata_device *dev) 4499 { 4500 if (dev->sdev) 4501 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4502 GFP_ATOMIC); 4503 } 4504 4505 /** 4506 * ata_scsi_hotplug - SCSI part of hotplug 4507 * @work: Pointer to ATA port to perform SCSI hotplug on 4508 * 4509 * Perform SCSI part of hotplug. It's executed from a separate 4510 * workqueue after EH completes. This is necessary because SCSI 4511 * hot plugging requires working EH and hot unplugging is 4512 * synchronized with hot plugging with a mutex. 4513 * 4514 * LOCKING: 4515 * Kernel thread context (may sleep). 4516 */ 4517 void ata_scsi_hotplug(struct work_struct *work) 4518 { 4519 struct ata_port *ap = 4520 container_of(work, struct ata_port, hotplug_task.work); 4521 int i; 4522 4523 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4524 DPRINTK("ENTER/EXIT - unloading\n"); 4525 return; 4526 } 4527 4528 DPRINTK("ENTER\n"); 4529 mutex_lock(&ap->scsi_scan_mutex); 4530 4531 /* Unplug detached devices. We cannot use link iterator here 4532 * because PMP links have to be scanned even if PMP is 4533 * currently not attached. Iterate manually. 4534 */ 4535 ata_scsi_handle_link_detach(&ap->link); 4536 if (ap->pmp_link) 4537 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4538 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4539 4540 /* scan for new ones */ 4541 ata_scsi_scan_host(ap, 0); 4542 4543 mutex_unlock(&ap->scsi_scan_mutex); 4544 DPRINTK("EXIT\n"); 4545 } 4546 4547 /** 4548 * ata_scsi_user_scan - indication for user-initiated bus scan 4549 * @shost: SCSI host to scan 4550 * @channel: Channel to scan 4551 * @id: ID to scan 4552 * @lun: LUN to scan 4553 * 4554 * This function is called when user explicitly requests bus 4555 * scan. Set probe pending flag and invoke EH. 4556 * 4557 * LOCKING: 4558 * SCSI layer (we don't care) 4559 * 4560 * RETURNS: 4561 * Zero. 4562 */ 4563 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4564 unsigned int id, u64 lun) 4565 { 4566 struct ata_port *ap = ata_shost_to_port(shost); 4567 unsigned long flags; 4568 int devno, rc = 0; 4569 4570 if (!ap->ops->error_handler) 4571 return -EOPNOTSUPP; 4572 4573 if (lun != SCAN_WILD_CARD && lun) 4574 return -EINVAL; 4575 4576 if (!sata_pmp_attached(ap)) { 4577 if (channel != SCAN_WILD_CARD && channel) 4578 return -EINVAL; 4579 devno = id; 4580 } else { 4581 if (id != SCAN_WILD_CARD && id) 4582 return -EINVAL; 4583 devno = channel; 4584 } 4585 4586 spin_lock_irqsave(ap->lock, flags); 4587 4588 if (devno == SCAN_WILD_CARD) { 4589 struct ata_link *link; 4590 4591 ata_for_each_link(link, ap, EDGE) { 4592 struct ata_eh_info *ehi = &link->eh_info; 4593 ehi->probe_mask |= ATA_ALL_DEVICES; 4594 ehi->action |= ATA_EH_RESET; 4595 } 4596 } else { 4597 struct ata_device *dev = ata_find_dev(ap, devno); 4598 4599 if (dev) { 4600 struct ata_eh_info *ehi = &dev->link->eh_info; 4601 ehi->probe_mask |= 1 << dev->devno; 4602 ehi->action |= ATA_EH_RESET; 4603 } else 4604 rc = -EINVAL; 4605 } 4606 4607 if (rc == 0) { 4608 ata_port_schedule_eh(ap); 4609 spin_unlock_irqrestore(ap->lock, flags); 4610 ata_port_wait_eh(ap); 4611 } else 4612 spin_unlock_irqrestore(ap->lock, flags); 4613 4614 return rc; 4615 } 4616 4617 /** 4618 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4619 * @work: Pointer to ATA port to perform scsi_rescan_device() 4620 * 4621 * After ATA pass thru (SAT) commands are executed successfully, 4622 * libata need to propagate the changes to SCSI layer. 4623 * 4624 * LOCKING: 4625 * Kernel thread context (may sleep). 4626 */ 4627 void ata_scsi_dev_rescan(struct work_struct *work) 4628 { 4629 struct ata_port *ap = 4630 container_of(work, struct ata_port, scsi_rescan_task); 4631 struct ata_link *link; 4632 struct ata_device *dev; 4633 unsigned long flags; 4634 4635 mutex_lock(&ap->scsi_scan_mutex); 4636 spin_lock_irqsave(ap->lock, flags); 4637 4638 ata_for_each_link(link, ap, EDGE) { 4639 ata_for_each_dev(dev, link, ENABLED) { 4640 struct scsi_device *sdev = dev->sdev; 4641 4642 if (!sdev) 4643 continue; 4644 if (scsi_device_get(sdev)) 4645 continue; 4646 4647 spin_unlock_irqrestore(ap->lock, flags); 4648 scsi_rescan_device(&(sdev->sdev_gendev)); 4649 scsi_device_put(sdev); 4650 spin_lock_irqsave(ap->lock, flags); 4651 } 4652 } 4653 4654 spin_unlock_irqrestore(ap->lock, flags); 4655 mutex_unlock(&ap->scsi_scan_mutex); 4656 } 4657