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 uninitialized_var(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->request->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 static int atapi_drain_needed(struct request *rq) 1021 { 1022 if (likely(!blk_rq_is_passthrough(rq))) 1023 return 0; 1024 1025 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq))) 1026 return 0; 1027 1028 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; 1029 } 1030 1031 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1032 { 1033 struct request_queue *q = sdev->request_queue; 1034 1035 if (!ata_id_has_unload(dev->id)) 1036 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1037 1038 /* configure max sectors */ 1039 blk_queue_max_hw_sectors(q, dev->max_sectors); 1040 1041 if (dev->class == ATA_DEV_ATAPI) { 1042 void *buf; 1043 1044 sdev->sector_size = ATA_SECT_SIZE; 1045 1046 /* set DMA padding */ 1047 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1048 1049 /* configure draining */ 1050 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1051 if (!buf) { 1052 ata_dev_err(dev, "drain buffer allocation failed\n"); 1053 return -ENOMEM; 1054 } 1055 1056 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1057 } else { 1058 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1059 sdev->manage_start_stop = 1; 1060 } 1061 1062 /* 1063 * ata_pio_sectors() expects buffer for each sector to not cross 1064 * page boundary. Enforce it by requiring buffers to be sector 1065 * aligned, which works iff sector_size is not larger than 1066 * PAGE_SIZE. ATAPI devices also need the alignment as 1067 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1068 */ 1069 if (sdev->sector_size > PAGE_SIZE) 1070 ata_dev_warn(dev, 1071 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1072 sdev->sector_size); 1073 1074 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1075 1076 if (dev->flags & ATA_DFLAG_AN) 1077 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1078 1079 if (dev->flags & ATA_DFLAG_NCQ) { 1080 int depth; 1081 1082 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1083 depth = min(ATA_MAX_QUEUE, depth); 1084 scsi_change_queue_depth(sdev, depth); 1085 } 1086 1087 if (dev->flags & ATA_DFLAG_TRUSTED) 1088 sdev->security_supported = 1; 1089 1090 dev->sdev = sdev; 1091 return 0; 1092 } 1093 1094 /** 1095 * ata_scsi_slave_config - Set SCSI device attributes 1096 * @sdev: SCSI device to examine 1097 * 1098 * This is called before we actually start reading 1099 * and writing to the device, to configure certain 1100 * SCSI mid-layer behaviors. 1101 * 1102 * LOCKING: 1103 * Defined by SCSI layer. We don't really care. 1104 */ 1105 1106 int ata_scsi_slave_config(struct scsi_device *sdev) 1107 { 1108 struct ata_port *ap = ata_shost_to_port(sdev->host); 1109 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1110 int rc = 0; 1111 1112 ata_scsi_sdev_config(sdev); 1113 1114 if (dev) 1115 rc = ata_scsi_dev_config(sdev, dev); 1116 1117 return rc; 1118 } 1119 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1120 1121 /** 1122 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1123 * @sdev: SCSI device to be destroyed 1124 * 1125 * @sdev is about to be destroyed for hot/warm unplugging. If 1126 * this unplugging was initiated by libata as indicated by NULL 1127 * dev->sdev, this function doesn't have to do anything. 1128 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1129 * Clear dev->sdev, schedule the device for ATA detach and invoke 1130 * EH. 1131 * 1132 * LOCKING: 1133 * Defined by SCSI layer. We don't really care. 1134 */ 1135 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1136 { 1137 struct ata_port *ap = ata_shost_to_port(sdev->host); 1138 struct request_queue *q = sdev->request_queue; 1139 unsigned long flags; 1140 struct ata_device *dev; 1141 1142 if (!ap->ops->error_handler) 1143 return; 1144 1145 spin_lock_irqsave(ap->lock, flags); 1146 dev = __ata_scsi_find_dev(ap, sdev); 1147 if (dev && dev->sdev) { 1148 /* SCSI device already in CANCEL state, no need to offline it */ 1149 dev->sdev = NULL; 1150 dev->flags |= ATA_DFLAG_DETACH; 1151 ata_port_schedule_eh(ap); 1152 } 1153 spin_unlock_irqrestore(ap->lock, flags); 1154 1155 kfree(q->dma_drain_buffer); 1156 q->dma_drain_buffer = NULL; 1157 q->dma_drain_size = 0; 1158 } 1159 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1160 1161 /** 1162 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1163 * @qc: Storage for translated ATA taskfile 1164 * 1165 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1166 * (to start). Perhaps these commands should be preceded by 1167 * CHECK POWER MODE to see what power mode the device is already in. 1168 * [See SAT revision 5 at www.t10.org] 1169 * 1170 * LOCKING: 1171 * spin_lock_irqsave(host lock) 1172 * 1173 * RETURNS: 1174 * Zero on success, non-zero on error. 1175 */ 1176 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1177 { 1178 struct scsi_cmnd *scmd = qc->scsicmd; 1179 struct ata_taskfile *tf = &qc->tf; 1180 const u8 *cdb = scmd->cmnd; 1181 u16 fp; 1182 u8 bp = 0xff; 1183 1184 if (scmd->cmd_len < 5) { 1185 fp = 4; 1186 goto invalid_fld; 1187 } 1188 1189 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1190 tf->protocol = ATA_PROT_NODATA; 1191 if (cdb[1] & 0x1) { 1192 ; /* ignore IMMED bit, violates sat-r05 */ 1193 } 1194 if (cdb[4] & 0x2) { 1195 fp = 4; 1196 bp = 1; 1197 goto invalid_fld; /* LOEJ bit set not supported */ 1198 } 1199 if (((cdb[4] >> 4) & 0xf) != 0) { 1200 fp = 4; 1201 bp = 3; 1202 goto invalid_fld; /* power conditions not supported */ 1203 } 1204 1205 if (cdb[4] & 0x1) { 1206 tf->nsect = 1; /* 1 sector, lba=0 */ 1207 1208 if (qc->dev->flags & ATA_DFLAG_LBA) { 1209 tf->flags |= ATA_TFLAG_LBA; 1210 1211 tf->lbah = 0x0; 1212 tf->lbam = 0x0; 1213 tf->lbal = 0x0; 1214 tf->device |= ATA_LBA; 1215 } else { 1216 /* CHS */ 1217 tf->lbal = 0x1; /* sect */ 1218 tf->lbam = 0x0; /* cyl low */ 1219 tf->lbah = 0x0; /* cyl high */ 1220 } 1221 1222 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1223 } else { 1224 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1225 * or S5) causing some drives to spin up and down again. 1226 */ 1227 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1228 system_state == SYSTEM_POWER_OFF) 1229 goto skip; 1230 1231 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1232 system_entering_hibernation()) 1233 goto skip; 1234 1235 /* Issue ATA STANDBY IMMEDIATE command */ 1236 tf->command = ATA_CMD_STANDBYNOW1; 1237 } 1238 1239 /* 1240 * Standby and Idle condition timers could be implemented but that 1241 * would require libata to implement the Power condition mode page 1242 * and allow the user to change it. Changing mode pages requires 1243 * MODE SELECT to be implemented. 1244 */ 1245 1246 return 0; 1247 1248 invalid_fld: 1249 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1250 return 1; 1251 skip: 1252 scmd->result = SAM_STAT_GOOD; 1253 return 1; 1254 } 1255 1256 1257 /** 1258 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1259 * @qc: Storage for translated ATA taskfile 1260 * 1261 * Sets up an ATA taskfile to issue FLUSH CACHE or 1262 * FLUSH CACHE EXT. 1263 * 1264 * LOCKING: 1265 * spin_lock_irqsave(host lock) 1266 * 1267 * RETURNS: 1268 * Zero on success, non-zero on error. 1269 */ 1270 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1271 { 1272 struct ata_taskfile *tf = &qc->tf; 1273 1274 tf->flags |= ATA_TFLAG_DEVICE; 1275 tf->protocol = ATA_PROT_NODATA; 1276 1277 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1278 tf->command = ATA_CMD_FLUSH_EXT; 1279 else 1280 tf->command = ATA_CMD_FLUSH; 1281 1282 /* flush is critical for IO integrity, consider it an IO command */ 1283 qc->flags |= ATA_QCFLAG_IO; 1284 1285 return 0; 1286 } 1287 1288 /** 1289 * scsi_6_lba_len - Get LBA and transfer length 1290 * @cdb: SCSI command to translate 1291 * 1292 * Calculate LBA and transfer length for 6-byte commands. 1293 * 1294 * RETURNS: 1295 * @plba: the LBA 1296 * @plen: the transfer length 1297 */ 1298 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1299 { 1300 u64 lba = 0; 1301 u32 len; 1302 1303 VPRINTK("six-byte command\n"); 1304 1305 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1306 lba |= ((u64)cdb[2]) << 8; 1307 lba |= ((u64)cdb[3]); 1308 1309 len = cdb[4]; 1310 1311 *plba = lba; 1312 *plen = len; 1313 } 1314 1315 /** 1316 * scsi_10_lba_len - Get LBA and transfer length 1317 * @cdb: SCSI command to translate 1318 * 1319 * Calculate LBA and transfer length for 10-byte commands. 1320 * 1321 * RETURNS: 1322 * @plba: the LBA 1323 * @plen: the transfer length 1324 */ 1325 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1326 { 1327 u64 lba = 0; 1328 u32 len = 0; 1329 1330 VPRINTK("ten-byte command\n"); 1331 1332 lba |= ((u64)cdb[2]) << 24; 1333 lba |= ((u64)cdb[3]) << 16; 1334 lba |= ((u64)cdb[4]) << 8; 1335 lba |= ((u64)cdb[5]); 1336 1337 len |= ((u32)cdb[7]) << 8; 1338 len |= ((u32)cdb[8]); 1339 1340 *plba = lba; 1341 *plen = len; 1342 } 1343 1344 /** 1345 * scsi_16_lba_len - Get LBA and transfer length 1346 * @cdb: SCSI command to translate 1347 * 1348 * Calculate LBA and transfer length for 16-byte commands. 1349 * 1350 * RETURNS: 1351 * @plba: the LBA 1352 * @plen: the transfer length 1353 */ 1354 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1355 { 1356 u64 lba = 0; 1357 u32 len = 0; 1358 1359 VPRINTK("sixteen-byte command\n"); 1360 1361 lba |= ((u64)cdb[2]) << 56; 1362 lba |= ((u64)cdb[3]) << 48; 1363 lba |= ((u64)cdb[4]) << 40; 1364 lba |= ((u64)cdb[5]) << 32; 1365 lba |= ((u64)cdb[6]) << 24; 1366 lba |= ((u64)cdb[7]) << 16; 1367 lba |= ((u64)cdb[8]) << 8; 1368 lba |= ((u64)cdb[9]); 1369 1370 len |= ((u32)cdb[10]) << 24; 1371 len |= ((u32)cdb[11]) << 16; 1372 len |= ((u32)cdb[12]) << 8; 1373 len |= ((u32)cdb[13]); 1374 1375 *plba = lba; 1376 *plen = len; 1377 } 1378 1379 /** 1380 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1381 * @qc: Storage for translated ATA taskfile 1382 * 1383 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1384 * 1385 * LOCKING: 1386 * spin_lock_irqsave(host lock) 1387 * 1388 * RETURNS: 1389 * Zero on success, non-zero on error. 1390 */ 1391 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1392 { 1393 struct scsi_cmnd *scmd = qc->scsicmd; 1394 struct ata_taskfile *tf = &qc->tf; 1395 struct ata_device *dev = qc->dev; 1396 u64 dev_sectors = qc->dev->n_sectors; 1397 const u8 *cdb = scmd->cmnd; 1398 u64 block; 1399 u32 n_block; 1400 u16 fp; 1401 1402 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1403 tf->protocol = ATA_PROT_NODATA; 1404 1405 if (cdb[0] == VERIFY) { 1406 if (scmd->cmd_len < 10) { 1407 fp = 9; 1408 goto invalid_fld; 1409 } 1410 scsi_10_lba_len(cdb, &block, &n_block); 1411 } else if (cdb[0] == VERIFY_16) { 1412 if (scmd->cmd_len < 16) { 1413 fp = 15; 1414 goto invalid_fld; 1415 } 1416 scsi_16_lba_len(cdb, &block, &n_block); 1417 } else { 1418 fp = 0; 1419 goto invalid_fld; 1420 } 1421 1422 if (!n_block) 1423 goto nothing_to_do; 1424 if (block >= dev_sectors) 1425 goto out_of_range; 1426 if ((block + n_block) > dev_sectors) 1427 goto out_of_range; 1428 1429 if (dev->flags & ATA_DFLAG_LBA) { 1430 tf->flags |= ATA_TFLAG_LBA; 1431 1432 if (lba_28_ok(block, n_block)) { 1433 /* use LBA28 */ 1434 tf->command = ATA_CMD_VERIFY; 1435 tf->device |= (block >> 24) & 0xf; 1436 } else if (lba_48_ok(block, n_block)) { 1437 if (!(dev->flags & ATA_DFLAG_LBA48)) 1438 goto out_of_range; 1439 1440 /* use LBA48 */ 1441 tf->flags |= ATA_TFLAG_LBA48; 1442 tf->command = ATA_CMD_VERIFY_EXT; 1443 1444 tf->hob_nsect = (n_block >> 8) & 0xff; 1445 1446 tf->hob_lbah = (block >> 40) & 0xff; 1447 tf->hob_lbam = (block >> 32) & 0xff; 1448 tf->hob_lbal = (block >> 24) & 0xff; 1449 } else 1450 /* request too large even for LBA48 */ 1451 goto out_of_range; 1452 1453 tf->nsect = n_block & 0xff; 1454 1455 tf->lbah = (block >> 16) & 0xff; 1456 tf->lbam = (block >> 8) & 0xff; 1457 tf->lbal = block & 0xff; 1458 1459 tf->device |= ATA_LBA; 1460 } else { 1461 /* CHS */ 1462 u32 sect, head, cyl, track; 1463 1464 if (!lba_28_ok(block, n_block)) 1465 goto out_of_range; 1466 1467 /* Convert LBA to CHS */ 1468 track = (u32)block / dev->sectors; 1469 cyl = track / dev->heads; 1470 head = track % dev->heads; 1471 sect = (u32)block % dev->sectors + 1; 1472 1473 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1474 (u32)block, track, cyl, head, sect); 1475 1476 /* Check whether the converted CHS can fit. 1477 Cylinder: 0-65535 1478 Head: 0-15 1479 Sector: 1-255*/ 1480 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1481 goto out_of_range; 1482 1483 tf->command = ATA_CMD_VERIFY; 1484 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1485 tf->lbal = sect; 1486 tf->lbam = cyl; 1487 tf->lbah = cyl >> 8; 1488 tf->device |= head; 1489 } 1490 1491 return 0; 1492 1493 invalid_fld: 1494 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1495 return 1; 1496 1497 out_of_range: 1498 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1499 /* "Logical Block Address out of range" */ 1500 return 1; 1501 1502 nothing_to_do: 1503 scmd->result = SAM_STAT_GOOD; 1504 return 1; 1505 } 1506 1507 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1508 { 1509 struct request *rq = scmd->request; 1510 u32 req_blocks; 1511 1512 if (!blk_rq_is_passthrough(rq)) 1513 return true; 1514 1515 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1516 if (n_blocks > req_blocks) 1517 return false; 1518 1519 return true; 1520 } 1521 1522 /** 1523 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1524 * @qc: Storage for translated ATA taskfile 1525 * 1526 * Converts any of six SCSI read/write commands into the 1527 * ATA counterpart, including starting sector (LBA), 1528 * sector count, and taking into account the device's LBA48 1529 * support. 1530 * 1531 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1532 * %WRITE_16 are currently supported. 1533 * 1534 * LOCKING: 1535 * spin_lock_irqsave(host lock) 1536 * 1537 * RETURNS: 1538 * Zero on success, non-zero on error. 1539 */ 1540 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1541 { 1542 struct scsi_cmnd *scmd = qc->scsicmd; 1543 const u8 *cdb = scmd->cmnd; 1544 struct request *rq = scmd->request; 1545 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1546 unsigned int tf_flags = 0; 1547 u64 block; 1548 u32 n_block; 1549 int rc; 1550 u16 fp = 0; 1551 1552 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1553 tf_flags |= ATA_TFLAG_WRITE; 1554 1555 /* Calculate the SCSI LBA, transfer length and FUA. */ 1556 switch (cdb[0]) { 1557 case READ_10: 1558 case WRITE_10: 1559 if (unlikely(scmd->cmd_len < 10)) { 1560 fp = 9; 1561 goto invalid_fld; 1562 } 1563 scsi_10_lba_len(cdb, &block, &n_block); 1564 if (cdb[1] & (1 << 3)) 1565 tf_flags |= ATA_TFLAG_FUA; 1566 if (!ata_check_nblocks(scmd, n_block)) 1567 goto invalid_fld; 1568 break; 1569 case READ_6: 1570 case WRITE_6: 1571 if (unlikely(scmd->cmd_len < 6)) { 1572 fp = 5; 1573 goto invalid_fld; 1574 } 1575 scsi_6_lba_len(cdb, &block, &n_block); 1576 1577 /* for 6-byte r/w commands, transfer length 0 1578 * means 256 blocks of data, not 0 block. 1579 */ 1580 if (!n_block) 1581 n_block = 256; 1582 if (!ata_check_nblocks(scmd, n_block)) 1583 goto invalid_fld; 1584 break; 1585 case READ_16: 1586 case WRITE_16: 1587 if (unlikely(scmd->cmd_len < 16)) { 1588 fp = 15; 1589 goto invalid_fld; 1590 } 1591 scsi_16_lba_len(cdb, &block, &n_block); 1592 if (cdb[1] & (1 << 3)) 1593 tf_flags |= ATA_TFLAG_FUA; 1594 if (!ata_check_nblocks(scmd, n_block)) 1595 goto invalid_fld; 1596 break; 1597 default: 1598 DPRINTK("no-byte command\n"); 1599 fp = 0; 1600 goto invalid_fld; 1601 } 1602 1603 /* Check and compose ATA command */ 1604 if (!n_block) 1605 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1606 * length 0 means transfer 0 block of data. 1607 * However, for ATA R/W commands, sector count 0 means 1608 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1609 * 1610 * WARNING: one or two older ATA drives treat 0 as 0... 1611 */ 1612 goto nothing_to_do; 1613 1614 qc->flags |= ATA_QCFLAG_IO; 1615 qc->nbytes = n_block * scmd->device->sector_size; 1616 1617 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1618 qc->hw_tag, class); 1619 1620 if (likely(rc == 0)) 1621 return 0; 1622 1623 if (rc == -ERANGE) 1624 goto out_of_range; 1625 /* treat all other errors as -EINVAL, fall through */ 1626 invalid_fld: 1627 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1628 return 1; 1629 1630 out_of_range: 1631 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1632 /* "Logical Block Address out of range" */ 1633 return 1; 1634 1635 nothing_to_do: 1636 scmd->result = SAM_STAT_GOOD; 1637 return 1; 1638 } 1639 1640 static void ata_qc_done(struct ata_queued_cmd *qc) 1641 { 1642 struct scsi_cmnd *cmd = qc->scsicmd; 1643 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1644 1645 ata_qc_free(qc); 1646 done(cmd); 1647 } 1648 1649 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1650 { 1651 struct ata_port *ap = qc->ap; 1652 struct scsi_cmnd *cmd = qc->scsicmd; 1653 u8 *cdb = cmd->cmnd; 1654 int need_sense = (qc->err_mask != 0); 1655 1656 /* For ATA pass thru (SAT) commands, generate a sense block if 1657 * user mandated it or if there's an error. Note that if we 1658 * generate because the user forced us to [CK_COND =1], a check 1659 * condition is generated and the ATA register values are returned 1660 * whether the command completed successfully or not. If there 1661 * was no error, we use the following sense data: 1662 * sk = RECOVERED ERROR 1663 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1664 */ 1665 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1666 ((cdb[2] & 0x20) || need_sense)) 1667 ata_gen_passthru_sense(qc); 1668 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1669 cmd->result = SAM_STAT_CHECK_CONDITION; 1670 else if (need_sense) 1671 ata_gen_ata_sense(qc); 1672 else 1673 cmd->result = SAM_STAT_GOOD; 1674 1675 if (need_sense && !ap->ops->error_handler) 1676 ata_dump_status(ap->print_id, &qc->result_tf); 1677 1678 ata_qc_done(qc); 1679 } 1680 1681 /** 1682 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1683 * @dev: ATA device to which the command is addressed 1684 * @cmd: SCSI command to execute 1685 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1686 * 1687 * Our ->queuecommand() function has decided that the SCSI 1688 * command issued can be directly translated into an ATA 1689 * command, rather than handled internally. 1690 * 1691 * This function sets up an ata_queued_cmd structure for the 1692 * SCSI command, and sends that ata_queued_cmd to the hardware. 1693 * 1694 * The xlat_func argument (actor) returns 0 if ready to execute 1695 * ATA command, else 1 to finish translation. If 1 is returned 1696 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1697 * to be set reflecting an error condition or clean (early) 1698 * termination. 1699 * 1700 * LOCKING: 1701 * spin_lock_irqsave(host lock) 1702 * 1703 * RETURNS: 1704 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1705 * needs to be deferred. 1706 */ 1707 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1708 ata_xlat_func_t xlat_func) 1709 { 1710 struct ata_port *ap = dev->link->ap; 1711 struct ata_queued_cmd *qc; 1712 int rc; 1713 1714 VPRINTK("ENTER\n"); 1715 1716 qc = ata_scsi_qc_new(dev, cmd); 1717 if (!qc) 1718 goto err_mem; 1719 1720 /* data is present; dma-map it */ 1721 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1722 cmd->sc_data_direction == DMA_TO_DEVICE) { 1723 if (unlikely(scsi_bufflen(cmd) < 1)) { 1724 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1725 goto err_did; 1726 } 1727 1728 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1729 1730 qc->dma_dir = cmd->sc_data_direction; 1731 } 1732 1733 qc->complete_fn = ata_scsi_qc_complete; 1734 1735 if (xlat_func(qc)) 1736 goto early_finish; 1737 1738 if (ap->ops->qc_defer) { 1739 if ((rc = ap->ops->qc_defer(qc))) 1740 goto defer; 1741 } 1742 1743 /* select device, send command to hardware */ 1744 ata_qc_issue(qc); 1745 1746 VPRINTK("EXIT\n"); 1747 return 0; 1748 1749 early_finish: 1750 ata_qc_free(qc); 1751 cmd->scsi_done(cmd); 1752 DPRINTK("EXIT - early finish (good or error)\n"); 1753 return 0; 1754 1755 err_did: 1756 ata_qc_free(qc); 1757 cmd->result = (DID_ERROR << 16); 1758 cmd->scsi_done(cmd); 1759 err_mem: 1760 DPRINTK("EXIT - internal\n"); 1761 return 0; 1762 1763 defer: 1764 ata_qc_free(qc); 1765 DPRINTK("EXIT - defer\n"); 1766 if (rc == ATA_DEFER_LINK) 1767 return SCSI_MLQUEUE_DEVICE_BUSY; 1768 else 1769 return SCSI_MLQUEUE_HOST_BUSY; 1770 } 1771 1772 struct ata_scsi_args { 1773 struct ata_device *dev; 1774 u16 *id; 1775 struct scsi_cmnd *cmd; 1776 }; 1777 1778 /** 1779 * ata_scsi_rbuf_get - Map response buffer. 1780 * @cmd: SCSI command containing buffer to be mapped. 1781 * @flags: unsigned long variable to store irq enable status 1782 * @copy_in: copy in from user buffer 1783 * 1784 * Prepare buffer for simulated SCSI commands. 1785 * 1786 * LOCKING: 1787 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 1788 * 1789 * RETURNS: 1790 * Pointer to response buffer. 1791 */ 1792 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 1793 unsigned long *flags) 1794 { 1795 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 1796 1797 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1798 if (copy_in) 1799 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1800 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1801 return ata_scsi_rbuf; 1802 } 1803 1804 /** 1805 * ata_scsi_rbuf_put - Unmap response buffer. 1806 * @cmd: SCSI command containing buffer to be unmapped. 1807 * @copy_out: copy out result 1808 * @flags: @flags passed to ata_scsi_rbuf_get() 1809 * 1810 * Returns rbuf buffer. The result is copied to @cmd's buffer if 1811 * @copy_back is true. 1812 * 1813 * LOCKING: 1814 * Unlocks ata_scsi_rbuf_lock. 1815 */ 1816 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 1817 unsigned long *flags) 1818 { 1819 if (copy_out) 1820 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1821 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1822 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 1823 } 1824 1825 /** 1826 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1827 * @args: device IDENTIFY data / SCSI command of interest. 1828 * @actor: Callback hook for desired SCSI command simulator 1829 * 1830 * Takes care of the hard work of simulating a SCSI command... 1831 * Mapping the response buffer, calling the command's handler, 1832 * and handling the handler's return value. This return value 1833 * indicates whether the handler wishes the SCSI command to be 1834 * completed successfully (0), or not (in which case cmd->result 1835 * and sense buffer are assumed to be set). 1836 * 1837 * LOCKING: 1838 * spin_lock_irqsave(host lock) 1839 */ 1840 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1841 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1842 { 1843 u8 *rbuf; 1844 unsigned int rc; 1845 struct scsi_cmnd *cmd = args->cmd; 1846 unsigned long flags; 1847 1848 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 1849 rc = actor(args, rbuf); 1850 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 1851 1852 if (rc == 0) 1853 cmd->result = SAM_STAT_GOOD; 1854 } 1855 1856 /** 1857 * ata_scsiop_inq_std - Simulate INQUIRY command 1858 * @args: device IDENTIFY data / SCSI command of interest. 1859 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1860 * 1861 * Returns standard device identification data associated 1862 * with non-VPD INQUIRY command output. 1863 * 1864 * LOCKING: 1865 * spin_lock_irqsave(host lock) 1866 */ 1867 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1868 { 1869 static const u8 versions[] = { 1870 0x00, 1871 0x60, /* SAM-3 (no version claimed) */ 1872 1873 0x03, 1874 0x20, /* SBC-2 (no version claimed) */ 1875 1876 0x03, 1877 0x00 /* SPC-3 (no version claimed) */ 1878 }; 1879 static const u8 versions_zbc[] = { 1880 0x00, 1881 0xA0, /* SAM-5 (no version claimed) */ 1882 1883 0x06, 1884 0x00, /* SBC-4 (no version claimed) */ 1885 1886 0x05, 1887 0xC0, /* SPC-5 (no version claimed) */ 1888 1889 0x60, 1890 0x24, /* ZBC r05 */ 1891 }; 1892 1893 u8 hdr[] = { 1894 TYPE_DISK, 1895 0, 1896 0x5, /* claim SPC-3 version compatibility */ 1897 2, 1898 95 - 4, 1899 0, 1900 0, 1901 2 1902 }; 1903 1904 VPRINTK("ENTER\n"); 1905 1906 /* set scsi removable (RMB) bit per ata bit, or if the 1907 * AHCI port says it's external (Hotplug-capable, eSATA). 1908 */ 1909 if (ata_id_removable(args->id) || 1910 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1911 hdr[1] |= (1 << 7); 1912 1913 if (args->dev->class == ATA_DEV_ZAC) { 1914 hdr[0] = TYPE_ZBC; 1915 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1916 } 1917 1918 memcpy(rbuf, hdr, sizeof(hdr)); 1919 memcpy(&rbuf[8], "ATA ", 8); 1920 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1921 1922 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1923 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1924 if (strncmp(&rbuf[32], " ", 4) == 0) 1925 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1926 1927 if (rbuf[32] == 0 || rbuf[32] == ' ') 1928 memcpy(&rbuf[32], "n/a ", 4); 1929 1930 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1931 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1932 else 1933 memcpy(rbuf + 58, versions, sizeof(versions)); 1934 1935 return 0; 1936 } 1937 1938 /** 1939 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1940 * @args: device IDENTIFY data / SCSI command of interest. 1941 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1942 * 1943 * Returns list of inquiry VPD pages available. 1944 * 1945 * LOCKING: 1946 * spin_lock_irqsave(host lock) 1947 */ 1948 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1949 { 1950 int num_pages; 1951 static const u8 pages[] = { 1952 0x00, /* page 0x00, this page */ 1953 0x80, /* page 0x80, unit serial no page */ 1954 0x83, /* page 0x83, device ident page */ 1955 0x89, /* page 0x89, ata info page */ 1956 0xb0, /* page 0xb0, block limits page */ 1957 0xb1, /* page 0xb1, block device characteristics page */ 1958 0xb2, /* page 0xb2, thin provisioning page */ 1959 0xb6, /* page 0xb6, zoned block device characteristics */ 1960 }; 1961 1962 num_pages = sizeof(pages); 1963 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 1964 num_pages--; 1965 rbuf[3] = num_pages; /* number of supported VPD pages */ 1966 memcpy(rbuf + 4, pages, num_pages); 1967 return 0; 1968 } 1969 1970 /** 1971 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1972 * @args: device IDENTIFY data / SCSI command of interest. 1973 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1974 * 1975 * Returns ATA device serial number. 1976 * 1977 * LOCKING: 1978 * spin_lock_irqsave(host lock) 1979 */ 1980 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1981 { 1982 static const u8 hdr[] = { 1983 0, 1984 0x80, /* this page code */ 1985 0, 1986 ATA_ID_SERNO_LEN, /* page len */ 1987 }; 1988 1989 memcpy(rbuf, hdr, sizeof(hdr)); 1990 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1991 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1992 return 0; 1993 } 1994 1995 /** 1996 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1997 * @args: device IDENTIFY data / SCSI command of interest. 1998 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1999 * 2000 * Yields two logical unit device identification designators: 2001 * - vendor specific ASCII containing the ATA serial number 2002 * - SAT defined "t10 vendor id based" containing ASCII vendor 2003 * name ("ATA "), model and serial numbers. 2004 * 2005 * LOCKING: 2006 * spin_lock_irqsave(host lock) 2007 */ 2008 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2009 { 2010 const int sat_model_serial_desc_len = 68; 2011 int num; 2012 2013 rbuf[1] = 0x83; /* this page code */ 2014 num = 4; 2015 2016 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2017 rbuf[num + 0] = 2; 2018 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2019 num += 4; 2020 ata_id_string(args->id, (unsigned char *) rbuf + num, 2021 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2022 num += ATA_ID_SERNO_LEN; 2023 2024 /* SAT defined lu model and serial numbers descriptor */ 2025 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2026 rbuf[num + 0] = 2; 2027 rbuf[num + 1] = 1; 2028 rbuf[num + 3] = sat_model_serial_desc_len; 2029 num += 4; 2030 memcpy(rbuf + num, "ATA ", 8); 2031 num += 8; 2032 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2033 ATA_ID_PROD_LEN); 2034 num += ATA_ID_PROD_LEN; 2035 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2036 ATA_ID_SERNO_LEN); 2037 num += ATA_ID_SERNO_LEN; 2038 2039 if (ata_id_has_wwn(args->id)) { 2040 /* SAT defined lu world wide name */ 2041 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2042 rbuf[num + 0] = 1; 2043 rbuf[num + 1] = 3; 2044 rbuf[num + 3] = ATA_ID_WWN_LEN; 2045 num += 4; 2046 ata_id_string(args->id, (unsigned char *) rbuf + num, 2047 ATA_ID_WWN, ATA_ID_WWN_LEN); 2048 num += ATA_ID_WWN_LEN; 2049 } 2050 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2051 return 0; 2052 } 2053 2054 /** 2055 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2056 * @args: device IDENTIFY data / SCSI command of interest. 2057 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2058 * 2059 * Yields SAT-specified ATA VPD page. 2060 * 2061 * LOCKING: 2062 * spin_lock_irqsave(host lock) 2063 */ 2064 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2065 { 2066 rbuf[1] = 0x89; /* our page code */ 2067 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2068 rbuf[3] = (0x238 & 0xff); 2069 2070 memcpy(&rbuf[8], "linux ", 8); 2071 memcpy(&rbuf[16], "libata ", 16); 2072 memcpy(&rbuf[32], DRV_VERSION, 4); 2073 2074 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2075 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2076 /* TODO: PMP? */ 2077 2078 /* we don't store the ATA device signature, so we fake it */ 2079 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2080 rbuf[40] = 0x1; 2081 rbuf[48] = 0x1; 2082 2083 rbuf[56] = ATA_CMD_ID_ATA; 2084 2085 memcpy(&rbuf[60], &args->id[0], 512); 2086 return 0; 2087 } 2088 2089 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2090 { 2091 u16 min_io_sectors; 2092 2093 rbuf[1] = 0xb0; 2094 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2095 2096 /* 2097 * Optimal transfer length granularity. 2098 * 2099 * This is always one physical block, but for disks with a smaller 2100 * logical than physical sector size we need to figure out what the 2101 * latter is. 2102 */ 2103 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2104 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2105 2106 /* 2107 * Optimal unmap granularity. 2108 * 2109 * The ATA spec doesn't even know about a granularity or alignment 2110 * for the TRIM command. We can leave away most of the unmap related 2111 * VPD page entries, but we have specifify a granularity to signal 2112 * that we support some form of unmap - in thise case via WRITE SAME 2113 * with the unmap bit set. 2114 */ 2115 if (ata_id_has_trim(args->id)) { 2116 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); 2117 put_unaligned_be32(1, &rbuf[28]); 2118 } 2119 2120 return 0; 2121 } 2122 2123 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2124 { 2125 int form_factor = ata_id_form_factor(args->id); 2126 int media_rotation_rate = ata_id_rotation_rate(args->id); 2127 u8 zoned = ata_id_zoned_cap(args->id); 2128 2129 rbuf[1] = 0xb1; 2130 rbuf[3] = 0x3c; 2131 rbuf[4] = media_rotation_rate >> 8; 2132 rbuf[5] = media_rotation_rate; 2133 rbuf[7] = form_factor; 2134 if (zoned) 2135 rbuf[8] = (zoned << 4); 2136 2137 return 0; 2138 } 2139 2140 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2141 { 2142 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2143 rbuf[1] = 0xb2; 2144 rbuf[3] = 0x4; 2145 rbuf[5] = 1 << 6; /* TPWS */ 2146 2147 return 0; 2148 } 2149 2150 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2151 { 2152 /* 2153 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2154 */ 2155 rbuf[1] = 0xb6; 2156 rbuf[3] = 0x3C; 2157 2158 /* 2159 * URSWRZ bit is only meaningful for host-managed ZAC drives 2160 */ 2161 if (args->dev->zac_zoned_cap & 1) 2162 rbuf[4] |= 1; 2163 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2164 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2165 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2166 2167 return 0; 2168 } 2169 2170 /** 2171 * modecpy - Prepare response for MODE SENSE 2172 * @dest: output buffer 2173 * @src: data being copied 2174 * @n: length of mode page 2175 * @changeable: whether changeable parameters are requested 2176 * 2177 * Generate a generic MODE SENSE page for either current or changeable 2178 * parameters. 2179 * 2180 * LOCKING: 2181 * None. 2182 */ 2183 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2184 { 2185 if (changeable) { 2186 memcpy(dest, src, 2); 2187 memset(dest + 2, 0, n - 2); 2188 } else { 2189 memcpy(dest, src, n); 2190 } 2191 } 2192 2193 /** 2194 * ata_msense_caching - Simulate MODE SENSE caching info page 2195 * @id: device IDENTIFY data 2196 * @buf: output buffer 2197 * @changeable: whether changeable parameters are requested 2198 * 2199 * Generate a caching info page, which conditionally indicates 2200 * write caching to the SCSI layer, depending on device 2201 * capabilities. 2202 * 2203 * LOCKING: 2204 * None. 2205 */ 2206 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2207 { 2208 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2209 if (changeable) { 2210 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2211 } else { 2212 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2213 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2214 } 2215 return sizeof(def_cache_mpage); 2216 } 2217 2218 /** 2219 * ata_msense_control - Simulate MODE SENSE control mode page 2220 * @dev: ATA device of interest 2221 * @buf: output buffer 2222 * @changeable: whether changeable parameters are requested 2223 * 2224 * Generate a generic MODE SENSE control mode page. 2225 * 2226 * LOCKING: 2227 * None. 2228 */ 2229 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2230 bool changeable) 2231 { 2232 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2233 if (changeable) { 2234 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2235 } else { 2236 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2237 2238 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2239 } 2240 return sizeof(def_control_mpage); 2241 } 2242 2243 /** 2244 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2245 * @buf: output buffer 2246 * @changeable: whether changeable parameters are requested 2247 * 2248 * Generate a generic MODE SENSE r/w error recovery page. 2249 * 2250 * LOCKING: 2251 * None. 2252 */ 2253 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2254 { 2255 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2256 changeable); 2257 return sizeof(def_rw_recovery_mpage); 2258 } 2259 2260 /* 2261 * We can turn this into a real blacklist if it's needed, for now just 2262 * blacklist any Maxtor BANC1G10 revision firmware 2263 */ 2264 static int ata_dev_supports_fua(u16 *id) 2265 { 2266 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2267 2268 if (!libata_fua) 2269 return 0; 2270 if (!ata_id_has_fua(id)) 2271 return 0; 2272 2273 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2274 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2275 2276 if (strcmp(model, "Maxtor")) 2277 return 1; 2278 if (strcmp(fw, "BANC1G10")) 2279 return 1; 2280 2281 return 0; /* blacklisted */ 2282 } 2283 2284 /** 2285 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2286 * @args: device IDENTIFY data / SCSI command of interest. 2287 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2288 * 2289 * Simulate MODE SENSE commands. Assume this is invoked for direct 2290 * access devices (e.g. disks) only. There should be no block 2291 * descriptor for other device types. 2292 * 2293 * LOCKING: 2294 * spin_lock_irqsave(host lock) 2295 */ 2296 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2297 { 2298 struct ata_device *dev = args->dev; 2299 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2300 static const u8 sat_blk_desc[] = { 2301 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2302 0, 2303 0, 0x2, 0x0 /* block length: 512 bytes */ 2304 }; 2305 u8 pg, spg; 2306 unsigned int ebd, page_control, six_byte; 2307 u8 dpofua, bp = 0xff; 2308 u16 fp; 2309 2310 VPRINTK("ENTER\n"); 2311 2312 six_byte = (scsicmd[0] == MODE_SENSE); 2313 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2314 /* 2315 * LLBA bit in msense(10) ignored (compliant) 2316 */ 2317 2318 page_control = scsicmd[2] >> 6; 2319 switch (page_control) { 2320 case 0: /* current */ 2321 case 1: /* changeable */ 2322 case 2: /* defaults */ 2323 break; /* supported */ 2324 case 3: /* saved */ 2325 goto saving_not_supp; 2326 default: 2327 fp = 2; 2328 bp = 6; 2329 goto invalid_fld; 2330 } 2331 2332 if (six_byte) 2333 p += 4 + (ebd ? 8 : 0); 2334 else 2335 p += 8 + (ebd ? 8 : 0); 2336 2337 pg = scsicmd[2] & 0x3f; 2338 spg = scsicmd[3]; 2339 /* 2340 * No mode subpages supported (yet) but asking for _all_ 2341 * subpages may be valid 2342 */ 2343 if (spg && (spg != ALL_SUB_MPAGES)) { 2344 fp = 3; 2345 goto invalid_fld; 2346 } 2347 2348 switch(pg) { 2349 case RW_RECOVERY_MPAGE: 2350 p += ata_msense_rw_recovery(p, page_control == 1); 2351 break; 2352 2353 case CACHE_MPAGE: 2354 p += ata_msense_caching(args->id, p, page_control == 1); 2355 break; 2356 2357 case CONTROL_MPAGE: 2358 p += ata_msense_control(args->dev, p, page_control == 1); 2359 break; 2360 2361 case ALL_MPAGES: 2362 p += ata_msense_rw_recovery(p, page_control == 1); 2363 p += ata_msense_caching(args->id, p, page_control == 1); 2364 p += ata_msense_control(args->dev, p, page_control == 1); 2365 break; 2366 2367 default: /* invalid page code */ 2368 fp = 2; 2369 goto invalid_fld; 2370 } 2371 2372 dpofua = 0; 2373 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2374 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2375 dpofua = 1 << 4; 2376 2377 if (six_byte) { 2378 rbuf[0] = p - rbuf - 1; 2379 rbuf[2] |= dpofua; 2380 if (ebd) { 2381 rbuf[3] = sizeof(sat_blk_desc); 2382 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2383 } 2384 } else { 2385 unsigned int output_len = p - rbuf - 2; 2386 2387 rbuf[0] = output_len >> 8; 2388 rbuf[1] = output_len; 2389 rbuf[3] |= dpofua; 2390 if (ebd) { 2391 rbuf[7] = sizeof(sat_blk_desc); 2392 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2393 } 2394 } 2395 return 0; 2396 2397 invalid_fld: 2398 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2399 return 1; 2400 2401 saving_not_supp: 2402 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2403 /* "Saving parameters not supported" */ 2404 return 1; 2405 } 2406 2407 /** 2408 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2409 * @args: device IDENTIFY data / SCSI command of interest. 2410 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2411 * 2412 * Simulate READ CAPACITY commands. 2413 * 2414 * LOCKING: 2415 * None. 2416 */ 2417 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2418 { 2419 struct ata_device *dev = args->dev; 2420 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2421 u32 sector_size; /* physical sector size in bytes */ 2422 u8 log2_per_phys; 2423 u16 lowest_aligned; 2424 2425 sector_size = ata_id_logical_sector_size(dev->id); 2426 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2427 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2428 2429 VPRINTK("ENTER\n"); 2430 2431 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2432 if (last_lba >= 0xffffffffULL) 2433 last_lba = 0xffffffff; 2434 2435 /* sector count, 32-bit */ 2436 rbuf[0] = last_lba >> (8 * 3); 2437 rbuf[1] = last_lba >> (8 * 2); 2438 rbuf[2] = last_lba >> (8 * 1); 2439 rbuf[3] = last_lba; 2440 2441 /* sector size */ 2442 rbuf[4] = sector_size >> (8 * 3); 2443 rbuf[5] = sector_size >> (8 * 2); 2444 rbuf[6] = sector_size >> (8 * 1); 2445 rbuf[7] = sector_size; 2446 } else { 2447 /* sector count, 64-bit */ 2448 rbuf[0] = last_lba >> (8 * 7); 2449 rbuf[1] = last_lba >> (8 * 6); 2450 rbuf[2] = last_lba >> (8 * 5); 2451 rbuf[3] = last_lba >> (8 * 4); 2452 rbuf[4] = last_lba >> (8 * 3); 2453 rbuf[5] = last_lba >> (8 * 2); 2454 rbuf[6] = last_lba >> (8 * 1); 2455 rbuf[7] = last_lba; 2456 2457 /* sector size */ 2458 rbuf[ 8] = sector_size >> (8 * 3); 2459 rbuf[ 9] = sector_size >> (8 * 2); 2460 rbuf[10] = sector_size >> (8 * 1); 2461 rbuf[11] = sector_size; 2462 2463 rbuf[12] = 0; 2464 rbuf[13] = log2_per_phys; 2465 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2466 rbuf[15] = lowest_aligned; 2467 2468 if (ata_id_has_trim(args->id) && 2469 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2470 rbuf[14] |= 0x80; /* LBPME */ 2471 2472 if (ata_id_has_zero_after_trim(args->id) && 2473 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2474 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2475 rbuf[14] |= 0x40; /* LBPRZ */ 2476 } 2477 } 2478 if (ata_id_zoned_cap(args->id) || 2479 args->dev->class == ATA_DEV_ZAC) 2480 rbuf[12] = (1 << 4); /* RC_BASIS */ 2481 } 2482 return 0; 2483 } 2484 2485 /** 2486 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2487 * @args: device IDENTIFY data / SCSI command of interest. 2488 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2489 * 2490 * Simulate REPORT LUNS command. 2491 * 2492 * LOCKING: 2493 * spin_lock_irqsave(host lock) 2494 */ 2495 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2496 { 2497 VPRINTK("ENTER\n"); 2498 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2499 2500 return 0; 2501 } 2502 2503 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2504 { 2505 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2506 /* FIXME: not quite right; we don't want the 2507 * translation of taskfile registers into 2508 * a sense descriptors, since that's only 2509 * correct for ATA, not ATAPI 2510 */ 2511 ata_gen_passthru_sense(qc); 2512 } 2513 2514 ata_qc_done(qc); 2515 } 2516 2517 /* is it pointless to prefer PIO for "safety reasons"? */ 2518 static inline int ata_pio_use_silly(struct ata_port *ap) 2519 { 2520 return (ap->flags & ATA_FLAG_PIO_DMA); 2521 } 2522 2523 static void atapi_request_sense(struct ata_queued_cmd *qc) 2524 { 2525 struct ata_port *ap = qc->ap; 2526 struct scsi_cmnd *cmd = qc->scsicmd; 2527 2528 DPRINTK("ATAPI request sense\n"); 2529 2530 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2531 2532 #ifdef CONFIG_ATA_SFF 2533 if (ap->ops->sff_tf_read) 2534 ap->ops->sff_tf_read(ap, &qc->tf); 2535 #endif 2536 2537 /* fill these in, for the case where they are -not- overwritten */ 2538 cmd->sense_buffer[0] = 0x70; 2539 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2540 2541 ata_qc_reinit(qc); 2542 2543 /* setup sg table and init transfer direction */ 2544 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2545 ata_sg_init(qc, &qc->sgent, 1); 2546 qc->dma_dir = DMA_FROM_DEVICE; 2547 2548 memset(&qc->cdb, 0, qc->dev->cdb_len); 2549 qc->cdb[0] = REQUEST_SENSE; 2550 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2551 2552 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2553 qc->tf.command = ATA_CMD_PACKET; 2554 2555 if (ata_pio_use_silly(ap)) { 2556 qc->tf.protocol = ATAPI_PROT_DMA; 2557 qc->tf.feature |= ATAPI_PKT_DMA; 2558 } else { 2559 qc->tf.protocol = ATAPI_PROT_PIO; 2560 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2561 qc->tf.lbah = 0; 2562 } 2563 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2564 2565 qc->complete_fn = atapi_sense_complete; 2566 2567 ata_qc_issue(qc); 2568 2569 DPRINTK("EXIT\n"); 2570 } 2571 2572 /* 2573 * ATAPI devices typically report zero for their SCSI version, and sometimes 2574 * deviate from the spec WRT response data format. If SCSI version is 2575 * reported as zero like normal, then we make the following fixups: 2576 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2577 * modern device. 2578 * 2) Ensure response data format / ATAPI information are always correct. 2579 */ 2580 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2581 { 2582 u8 buf[4]; 2583 2584 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2585 if (buf[2] == 0) { 2586 buf[2] = 0x5; 2587 buf[3] = 0x32; 2588 } 2589 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2590 } 2591 2592 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2593 { 2594 struct scsi_cmnd *cmd = qc->scsicmd; 2595 unsigned int err_mask = qc->err_mask; 2596 2597 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2598 2599 /* handle completion from new EH */ 2600 if (unlikely(qc->ap->ops->error_handler && 2601 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2602 2603 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2604 /* FIXME: not quite right; we don't want the 2605 * translation of taskfile registers into a 2606 * sense descriptors, since that's only 2607 * correct for ATA, not ATAPI 2608 */ 2609 ata_gen_passthru_sense(qc); 2610 } 2611 2612 /* SCSI EH automatically locks door if sdev->locked is 2613 * set. Sometimes door lock request continues to 2614 * fail, for example, when no media is present. This 2615 * creates a loop - SCSI EH issues door lock which 2616 * fails and gets invoked again to acquire sense data 2617 * for the failed command. 2618 * 2619 * If door lock fails, always clear sdev->locked to 2620 * avoid this infinite loop. 2621 * 2622 * This may happen before SCSI scan is complete. Make 2623 * sure qc->dev->sdev isn't NULL before dereferencing. 2624 */ 2625 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2626 qc->dev->sdev->locked = 0; 2627 2628 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2629 ata_qc_done(qc); 2630 return; 2631 } 2632 2633 /* successful completion or old EH failure path */ 2634 if (unlikely(err_mask & AC_ERR_DEV)) { 2635 cmd->result = SAM_STAT_CHECK_CONDITION; 2636 atapi_request_sense(qc); 2637 return; 2638 } else if (unlikely(err_mask)) { 2639 /* FIXME: not quite right; we don't want the 2640 * translation of taskfile registers into 2641 * a sense descriptors, since that's only 2642 * correct for ATA, not ATAPI 2643 */ 2644 ata_gen_passthru_sense(qc); 2645 } else { 2646 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2647 atapi_fixup_inquiry(cmd); 2648 cmd->result = SAM_STAT_GOOD; 2649 } 2650 2651 ata_qc_done(qc); 2652 } 2653 /** 2654 * atapi_xlat - Initialize PACKET taskfile 2655 * @qc: command structure to be initialized 2656 * 2657 * LOCKING: 2658 * spin_lock_irqsave(host lock) 2659 * 2660 * RETURNS: 2661 * Zero on success, non-zero on failure. 2662 */ 2663 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2664 { 2665 struct scsi_cmnd *scmd = qc->scsicmd; 2666 struct ata_device *dev = qc->dev; 2667 int nodata = (scmd->sc_data_direction == DMA_NONE); 2668 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2669 unsigned int nbytes; 2670 2671 memset(qc->cdb, 0, dev->cdb_len); 2672 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2673 2674 qc->complete_fn = atapi_qc_complete; 2675 2676 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2677 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2678 qc->tf.flags |= ATA_TFLAG_WRITE; 2679 DPRINTK("direction: write\n"); 2680 } 2681 2682 qc->tf.command = ATA_CMD_PACKET; 2683 ata_qc_set_pc_nbytes(qc); 2684 2685 /* check whether ATAPI DMA is safe */ 2686 if (!nodata && !using_pio && atapi_check_dma(qc)) 2687 using_pio = 1; 2688 2689 /* Some controller variants snoop this value for Packet 2690 * transfers to do state machine and FIFO management. Thus we 2691 * want to set it properly, and for DMA where it is 2692 * effectively meaningless. 2693 */ 2694 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2695 2696 /* Most ATAPI devices which honor transfer chunk size don't 2697 * behave according to the spec when odd chunk size which 2698 * matches the transfer length is specified. If the number of 2699 * bytes to transfer is 2n+1. According to the spec, what 2700 * should happen is to indicate that 2n+1 is going to be 2701 * transferred and transfer 2n+2 bytes where the last byte is 2702 * padding. 2703 * 2704 * In practice, this doesn't happen. ATAPI devices first 2705 * indicate and transfer 2n bytes and then indicate and 2706 * transfer 2 bytes where the last byte is padding. 2707 * 2708 * This inconsistency confuses several controllers which 2709 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2710 * These controllers use actual number of transferred bytes to 2711 * update DMA pointer and transfer of 4n+2 bytes make those 2712 * controller push DMA pointer by 4n+4 bytes because SATA data 2713 * FISes are aligned to 4 bytes. This causes data corruption 2714 * and buffer overrun. 2715 * 2716 * Always setting nbytes to even number solves this problem 2717 * because then ATAPI devices don't have to split data at 2n 2718 * boundaries. 2719 */ 2720 if (nbytes & 0x1) 2721 nbytes++; 2722 2723 qc->tf.lbam = (nbytes & 0xFF); 2724 qc->tf.lbah = (nbytes >> 8); 2725 2726 if (nodata) 2727 qc->tf.protocol = ATAPI_PROT_NODATA; 2728 else if (using_pio) 2729 qc->tf.protocol = ATAPI_PROT_PIO; 2730 else { 2731 /* DMA data xfer */ 2732 qc->tf.protocol = ATAPI_PROT_DMA; 2733 qc->tf.feature |= ATAPI_PKT_DMA; 2734 2735 if ((dev->flags & ATA_DFLAG_DMADIR) && 2736 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2737 /* some SATA bridges need us to indicate data xfer direction */ 2738 qc->tf.feature |= ATAPI_DMADIR; 2739 } 2740 2741 2742 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2743 as ATAPI tape drives don't get this right otherwise */ 2744 return 0; 2745 } 2746 2747 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2748 { 2749 if (!sata_pmp_attached(ap)) { 2750 if (likely(devno >= 0 && 2751 devno < ata_link_max_devices(&ap->link))) 2752 return &ap->link.device[devno]; 2753 } else { 2754 if (likely(devno >= 0 && 2755 devno < ap->nr_pmp_links)) 2756 return &ap->pmp_link[devno].device[0]; 2757 } 2758 2759 return NULL; 2760 } 2761 2762 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2763 const struct scsi_device *scsidev) 2764 { 2765 int devno; 2766 2767 /* skip commands not addressed to targets we simulate */ 2768 if (!sata_pmp_attached(ap)) { 2769 if (unlikely(scsidev->channel || scsidev->lun)) 2770 return NULL; 2771 devno = scsidev->id; 2772 } else { 2773 if (unlikely(scsidev->id || scsidev->lun)) 2774 return NULL; 2775 devno = scsidev->channel; 2776 } 2777 2778 return ata_find_dev(ap, devno); 2779 } 2780 2781 /** 2782 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2783 * @ap: ATA port to which the device is attached 2784 * @scsidev: SCSI device from which we derive the ATA device 2785 * 2786 * Given various information provided in struct scsi_cmnd, 2787 * map that onto an ATA bus, and using that mapping 2788 * determine which ata_device is associated with the 2789 * SCSI command to be sent. 2790 * 2791 * LOCKING: 2792 * spin_lock_irqsave(host lock) 2793 * 2794 * RETURNS: 2795 * Associated ATA device, or %NULL if not found. 2796 */ 2797 struct ata_device * 2798 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2799 { 2800 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2801 2802 if (unlikely(!dev || !ata_dev_enabled(dev))) 2803 return NULL; 2804 2805 return dev; 2806 } 2807 2808 /* 2809 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2810 * @byte1: Byte 1 from pass-thru CDB. 2811 * 2812 * RETURNS: 2813 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2814 */ 2815 static u8 2816 ata_scsi_map_proto(u8 byte1) 2817 { 2818 switch((byte1 & 0x1e) >> 1) { 2819 case 3: /* Non-data */ 2820 return ATA_PROT_NODATA; 2821 2822 case 6: /* DMA */ 2823 case 10: /* UDMA Data-in */ 2824 case 11: /* UDMA Data-Out */ 2825 return ATA_PROT_DMA; 2826 2827 case 4: /* PIO Data-in */ 2828 case 5: /* PIO Data-out */ 2829 return ATA_PROT_PIO; 2830 2831 case 12: /* FPDMA */ 2832 return ATA_PROT_NCQ; 2833 2834 case 0: /* Hard Reset */ 2835 case 1: /* SRST */ 2836 case 8: /* Device Diagnostic */ 2837 case 9: /* Device Reset */ 2838 case 7: /* DMA Queued */ 2839 case 15: /* Return Response Info */ 2840 default: /* Reserved */ 2841 break; 2842 } 2843 2844 return ATA_PROT_UNKNOWN; 2845 } 2846 2847 /** 2848 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2849 * @qc: command structure to be initialized 2850 * 2851 * Handles either 12, 16, or 32-byte versions of the CDB. 2852 * 2853 * RETURNS: 2854 * Zero on success, non-zero on failure. 2855 */ 2856 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2857 { 2858 struct ata_taskfile *tf = &(qc->tf); 2859 struct scsi_cmnd *scmd = qc->scsicmd; 2860 struct ata_device *dev = qc->dev; 2861 const u8 *cdb = scmd->cmnd; 2862 u16 fp; 2863 u16 cdb_offset = 0; 2864 2865 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2866 if (cdb[0] == VARIABLE_LENGTH_CMD) 2867 cdb_offset = 9; 2868 2869 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2870 if (tf->protocol == ATA_PROT_UNKNOWN) { 2871 fp = 1; 2872 goto invalid_fld; 2873 } 2874 2875 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0) 2876 tf->protocol = ATA_PROT_NCQ_NODATA; 2877 2878 /* enable LBA */ 2879 tf->flags |= ATA_TFLAG_LBA; 2880 2881 /* 2882 * 12 and 16 byte CDBs use different offsets to 2883 * provide the various register values. 2884 */ 2885 if (cdb[0] == ATA_16) { 2886 /* 2887 * 16-byte CDB - may contain extended commands. 2888 * 2889 * If that is the case, copy the upper byte register values. 2890 */ 2891 if (cdb[1] & 0x01) { 2892 tf->hob_feature = cdb[3]; 2893 tf->hob_nsect = cdb[5]; 2894 tf->hob_lbal = cdb[7]; 2895 tf->hob_lbam = cdb[9]; 2896 tf->hob_lbah = cdb[11]; 2897 tf->flags |= ATA_TFLAG_LBA48; 2898 } else 2899 tf->flags &= ~ATA_TFLAG_LBA48; 2900 2901 /* 2902 * Always copy low byte, device and command registers. 2903 */ 2904 tf->feature = cdb[4]; 2905 tf->nsect = cdb[6]; 2906 tf->lbal = cdb[8]; 2907 tf->lbam = cdb[10]; 2908 tf->lbah = cdb[12]; 2909 tf->device = cdb[13]; 2910 tf->command = cdb[14]; 2911 } else if (cdb[0] == ATA_12) { 2912 /* 2913 * 12-byte CDB - incapable of extended commands. 2914 */ 2915 tf->flags &= ~ATA_TFLAG_LBA48; 2916 2917 tf->feature = cdb[3]; 2918 tf->nsect = cdb[4]; 2919 tf->lbal = cdb[5]; 2920 tf->lbam = cdb[6]; 2921 tf->lbah = cdb[7]; 2922 tf->device = cdb[8]; 2923 tf->command = cdb[9]; 2924 } else { 2925 /* 2926 * 32-byte CDB - may contain extended command fields. 2927 * 2928 * If that is the case, copy the upper byte register values. 2929 */ 2930 if (cdb[10] & 0x01) { 2931 tf->hob_feature = cdb[20]; 2932 tf->hob_nsect = cdb[22]; 2933 tf->hob_lbal = cdb[16]; 2934 tf->hob_lbam = cdb[15]; 2935 tf->hob_lbah = cdb[14]; 2936 tf->flags |= ATA_TFLAG_LBA48; 2937 } else 2938 tf->flags &= ~ATA_TFLAG_LBA48; 2939 2940 tf->feature = cdb[21]; 2941 tf->nsect = cdb[23]; 2942 tf->lbal = cdb[19]; 2943 tf->lbam = cdb[18]; 2944 tf->lbah = cdb[17]; 2945 tf->device = cdb[24]; 2946 tf->command = cdb[25]; 2947 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2948 } 2949 2950 /* For NCQ commands copy the tag value */ 2951 if (ata_is_ncq(tf->protocol)) 2952 tf->nsect = qc->hw_tag << 3; 2953 2954 /* enforce correct master/slave bit */ 2955 tf->device = dev->devno ? 2956 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2957 2958 switch (tf->command) { 2959 /* READ/WRITE LONG use a non-standard sect_size */ 2960 case ATA_CMD_READ_LONG: 2961 case ATA_CMD_READ_LONG_ONCE: 2962 case ATA_CMD_WRITE_LONG: 2963 case ATA_CMD_WRITE_LONG_ONCE: 2964 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 2965 fp = 1; 2966 goto invalid_fld; 2967 } 2968 qc->sect_size = scsi_bufflen(scmd); 2969 break; 2970 2971 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2972 case ATA_CMD_CFA_WRITE_NE: 2973 case ATA_CMD_CFA_TRANS_SECT: 2974 case ATA_CMD_CFA_WRITE_MULT_NE: 2975 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2976 case ATA_CMD_READ: 2977 case ATA_CMD_READ_EXT: 2978 case ATA_CMD_READ_QUEUED: 2979 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2980 case ATA_CMD_FPDMA_READ: 2981 case ATA_CMD_READ_MULTI: 2982 case ATA_CMD_READ_MULTI_EXT: 2983 case ATA_CMD_PIO_READ: 2984 case ATA_CMD_PIO_READ_EXT: 2985 case ATA_CMD_READ_STREAM_DMA_EXT: 2986 case ATA_CMD_READ_STREAM_EXT: 2987 case ATA_CMD_VERIFY: 2988 case ATA_CMD_VERIFY_EXT: 2989 case ATA_CMD_WRITE: 2990 case ATA_CMD_WRITE_EXT: 2991 case ATA_CMD_WRITE_FUA_EXT: 2992 case ATA_CMD_WRITE_QUEUED: 2993 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2994 case ATA_CMD_FPDMA_WRITE: 2995 case ATA_CMD_WRITE_MULTI: 2996 case ATA_CMD_WRITE_MULTI_EXT: 2997 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2998 case ATA_CMD_PIO_WRITE: 2999 case ATA_CMD_PIO_WRITE_EXT: 3000 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3001 case ATA_CMD_WRITE_STREAM_EXT: 3002 qc->sect_size = scmd->device->sector_size; 3003 break; 3004 3005 /* Everything else uses 512 byte "sectors" */ 3006 default: 3007 qc->sect_size = ATA_SECT_SIZE; 3008 } 3009 3010 /* 3011 * Set flags so that all registers will be written, pass on 3012 * write indication (used for PIO/DMA setup), result TF is 3013 * copied back and we don't whine too much about its failure. 3014 */ 3015 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3016 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3017 tf->flags |= ATA_TFLAG_WRITE; 3018 3019 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3020 3021 /* 3022 * Set transfer length. 3023 * 3024 * TODO: find out if we need to do more here to 3025 * cover scatter/gather case. 3026 */ 3027 ata_qc_set_pc_nbytes(qc); 3028 3029 /* We may not issue DMA commands if no DMA mode is set */ 3030 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3031 fp = 1; 3032 goto invalid_fld; 3033 } 3034 3035 /* We may not issue NCQ commands to devices not supporting NCQ */ 3036 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3037 fp = 1; 3038 goto invalid_fld; 3039 } 3040 3041 /* sanity check for pio multi commands */ 3042 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3043 fp = 1; 3044 goto invalid_fld; 3045 } 3046 3047 if (is_multi_taskfile(tf)) { 3048 unsigned int multi_count = 1 << (cdb[1] >> 5); 3049 3050 /* compare the passed through multi_count 3051 * with the cached multi_count of libata 3052 */ 3053 if (multi_count != dev->multi_count) 3054 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3055 multi_count); 3056 } 3057 3058 /* 3059 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3060 * SET_FEATURES - XFER MODE must be preceded/succeeded 3061 * by an update to hardware-specific registers for each 3062 * controller (i.e. the reason for ->set_piomode(), 3063 * ->set_dmamode(), and ->post_set_mode() hooks). 3064 */ 3065 if (tf->command == ATA_CMD_SET_FEATURES && 3066 tf->feature == SETFEATURES_XFER) { 3067 fp = (cdb[0] == ATA_16) ? 4 : 3; 3068 goto invalid_fld; 3069 } 3070 3071 /* 3072 * Filter TPM commands by default. These provide an 3073 * essentially uncontrolled encrypted "back door" between 3074 * applications and the disk. Set libata.allow_tpm=1 if you 3075 * have a real reason for wanting to use them. This ensures 3076 * that installed software cannot easily mess stuff up without 3077 * user intent. DVR type users will probably ship with this enabled 3078 * for movie content management. 3079 * 3080 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3081 * for this and should do in future but that it is not sufficient as 3082 * DCS is an optional feature set. Thus we also do the software filter 3083 * so that we comply with the TC consortium stated goal that the user 3084 * can turn off TC features of their system. 3085 */ 3086 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3087 fp = (cdb[0] == ATA_16) ? 14 : 9; 3088 goto invalid_fld; 3089 } 3090 3091 return 0; 3092 3093 invalid_fld: 3094 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3095 return 1; 3096 } 3097 3098 /** 3099 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3100 * @cmd: SCSI command being translated 3101 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3102 * @sector: Starting sector 3103 * @count: Total Range of request in logical sectors 3104 * 3105 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3106 * descriptor. 3107 * 3108 * Upto 64 entries of the format: 3109 * 63:48 Range Length 3110 * 47:0 LBA 3111 * 3112 * Range Length of 0 is ignored. 3113 * LBA's should be sorted order and not overlap. 3114 * 3115 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3116 * 3117 * Return: Number of bytes copied into sglist. 3118 */ 3119 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3120 u64 sector, u32 count) 3121 { 3122 struct scsi_device *sdp = cmd->device; 3123 size_t len = sdp->sector_size; 3124 size_t r; 3125 __le64 *buf; 3126 u32 i = 0; 3127 unsigned long flags; 3128 3129 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3130 3131 if (len > ATA_SCSI_RBUF_SIZE) 3132 len = ATA_SCSI_RBUF_SIZE; 3133 3134 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3135 buf = ((void *)ata_scsi_rbuf); 3136 memset(buf, 0, len); 3137 while (i < trmax) { 3138 u64 entry = sector | 3139 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3140 buf[i++] = __cpu_to_le64(entry); 3141 if (count <= 0xffff) 3142 break; 3143 count -= 0xffff; 3144 sector += 0xffff; 3145 } 3146 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3147 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3148 3149 return r; 3150 } 3151 3152 /** 3153 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3154 * @qc: Command to be translated 3155 * 3156 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3157 * an SCT Write Same command. 3158 * Based on WRITE SAME has the UNMAP flag: 3159 * 3160 * - When set translate to DSM TRIM 3161 * - When clear translate to SCT Write Same 3162 */ 3163 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3164 { 3165 struct ata_taskfile *tf = &qc->tf; 3166 struct scsi_cmnd *scmd = qc->scsicmd; 3167 struct scsi_device *sdp = scmd->device; 3168 size_t len = sdp->sector_size; 3169 struct ata_device *dev = qc->dev; 3170 const u8 *cdb = scmd->cmnd; 3171 u64 block; 3172 u32 n_block; 3173 const u32 trmax = len >> 3; 3174 u32 size; 3175 u16 fp; 3176 u8 bp = 0xff; 3177 u8 unmap = cdb[1] & 0x8; 3178 3179 /* we may not issue DMA commands if no DMA mode is set */ 3180 if (unlikely(!dev->dma_mode)) 3181 goto invalid_opcode; 3182 3183 /* 3184 * We only allow sending this command through the block layer, 3185 * as it modifies the DATA OUT buffer, which would corrupt user 3186 * memory for SG_IO commands. 3187 */ 3188 if (unlikely(blk_rq_is_passthrough(scmd->request))) 3189 goto invalid_opcode; 3190 3191 if (unlikely(scmd->cmd_len < 16)) { 3192 fp = 15; 3193 goto invalid_fld; 3194 } 3195 scsi_16_lba_len(cdb, &block, &n_block); 3196 3197 if (!unmap || 3198 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3199 !ata_id_has_trim(dev->id)) { 3200 fp = 1; 3201 bp = 3; 3202 goto invalid_fld; 3203 } 3204 /* If the request is too large the cmd is invalid */ 3205 if (n_block > 0xffff * trmax) { 3206 fp = 2; 3207 goto invalid_fld; 3208 } 3209 3210 /* 3211 * WRITE SAME always has a sector sized buffer as payload, this 3212 * should never be a multiple entry S/G list. 3213 */ 3214 if (!scsi_sg_count(scmd)) 3215 goto invalid_param_len; 3216 3217 /* 3218 * size must match sector size in bytes 3219 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3220 * is defined as number of 512 byte blocks to be transferred. 3221 */ 3222 3223 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3224 if (size != len) 3225 goto invalid_param_len; 3226 3227 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3228 /* Newer devices support queued TRIM commands */ 3229 tf->protocol = ATA_PROT_NCQ; 3230 tf->command = ATA_CMD_FPDMA_SEND; 3231 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3232 tf->nsect = qc->hw_tag << 3; 3233 tf->hob_feature = (size / 512) >> 8; 3234 tf->feature = size / 512; 3235 3236 tf->auxiliary = 1; 3237 } else { 3238 tf->protocol = ATA_PROT_DMA; 3239 tf->hob_feature = 0; 3240 tf->feature = ATA_DSM_TRIM; 3241 tf->hob_nsect = (size / 512) >> 8; 3242 tf->nsect = size / 512; 3243 tf->command = ATA_CMD_DSM; 3244 } 3245 3246 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3247 ATA_TFLAG_WRITE; 3248 3249 ata_qc_set_pc_nbytes(qc); 3250 3251 return 0; 3252 3253 invalid_fld: 3254 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3255 return 1; 3256 invalid_param_len: 3257 /* "Parameter list length error" */ 3258 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3259 return 1; 3260 invalid_opcode: 3261 /* "Invalid command operation code" */ 3262 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3263 return 1; 3264 } 3265 3266 /** 3267 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3268 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3269 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3270 * 3271 * Yields a subset to satisfy scsi_report_opcode() 3272 * 3273 * LOCKING: 3274 * spin_lock_irqsave(host lock) 3275 */ 3276 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3277 { 3278 struct ata_device *dev = args->dev; 3279 u8 *cdb = args->cmd->cmnd; 3280 u8 supported = 0; 3281 unsigned int err = 0; 3282 3283 if (cdb[2] != 1) { 3284 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3285 err = 2; 3286 goto out; 3287 } 3288 switch (cdb[3]) { 3289 case INQUIRY: 3290 case MODE_SENSE: 3291 case MODE_SENSE_10: 3292 case READ_CAPACITY: 3293 case SERVICE_ACTION_IN_16: 3294 case REPORT_LUNS: 3295 case REQUEST_SENSE: 3296 case SYNCHRONIZE_CACHE: 3297 case REZERO_UNIT: 3298 case SEEK_6: 3299 case SEEK_10: 3300 case TEST_UNIT_READY: 3301 case SEND_DIAGNOSTIC: 3302 case MAINTENANCE_IN: 3303 case READ_6: 3304 case READ_10: 3305 case READ_16: 3306 case WRITE_6: 3307 case WRITE_10: 3308 case WRITE_16: 3309 case ATA_12: 3310 case ATA_16: 3311 case VERIFY: 3312 case VERIFY_16: 3313 case MODE_SELECT: 3314 case MODE_SELECT_10: 3315 case START_STOP: 3316 supported = 3; 3317 break; 3318 case ZBC_IN: 3319 case ZBC_OUT: 3320 if (ata_id_zoned_cap(dev->id) || 3321 dev->class == ATA_DEV_ZAC) 3322 supported = 3; 3323 break; 3324 case SECURITY_PROTOCOL_IN: 3325 case SECURITY_PROTOCOL_OUT: 3326 if (dev->flags & ATA_DFLAG_TRUSTED) 3327 supported = 3; 3328 break; 3329 default: 3330 break; 3331 } 3332 out: 3333 rbuf[1] = supported; /* supported */ 3334 return err; 3335 } 3336 3337 /** 3338 * ata_scsi_report_zones_complete - convert ATA output 3339 * @qc: command structure returning the data 3340 * 3341 * Convert T-13 little-endian field representation into 3342 * T-10 big-endian field representation. 3343 * What a mess. 3344 */ 3345 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3346 { 3347 struct scsi_cmnd *scmd = qc->scsicmd; 3348 struct sg_mapping_iter miter; 3349 unsigned long flags; 3350 unsigned int bytes = 0; 3351 3352 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3353 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3354 3355 local_irq_save(flags); 3356 while (sg_miter_next(&miter)) { 3357 unsigned int offset = 0; 3358 3359 if (bytes == 0) { 3360 char *hdr; 3361 u32 list_length; 3362 u64 max_lba, opt_lba; 3363 u16 same; 3364 3365 /* Swizzle header */ 3366 hdr = miter.addr; 3367 list_length = get_unaligned_le32(&hdr[0]); 3368 same = get_unaligned_le16(&hdr[4]); 3369 max_lba = get_unaligned_le64(&hdr[8]); 3370 opt_lba = get_unaligned_le64(&hdr[16]); 3371 put_unaligned_be32(list_length, &hdr[0]); 3372 hdr[4] = same & 0xf; 3373 put_unaligned_be64(max_lba, &hdr[8]); 3374 put_unaligned_be64(opt_lba, &hdr[16]); 3375 offset += 64; 3376 bytes += 64; 3377 } 3378 while (offset < miter.length) { 3379 char *rec; 3380 u8 cond, type, non_seq, reset; 3381 u64 size, start, wp; 3382 3383 /* Swizzle zone descriptor */ 3384 rec = miter.addr + offset; 3385 type = rec[0] & 0xf; 3386 cond = (rec[1] >> 4) & 0xf; 3387 non_seq = (rec[1] & 2); 3388 reset = (rec[1] & 1); 3389 size = get_unaligned_le64(&rec[8]); 3390 start = get_unaligned_le64(&rec[16]); 3391 wp = get_unaligned_le64(&rec[24]); 3392 rec[0] = type; 3393 rec[1] = (cond << 4) | non_seq | reset; 3394 put_unaligned_be64(size, &rec[8]); 3395 put_unaligned_be64(start, &rec[16]); 3396 put_unaligned_be64(wp, &rec[24]); 3397 WARN_ON(offset + 64 > miter.length); 3398 offset += 64; 3399 bytes += 64; 3400 } 3401 } 3402 sg_miter_stop(&miter); 3403 local_irq_restore(flags); 3404 3405 ata_scsi_qc_complete(qc); 3406 } 3407 3408 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3409 { 3410 struct ata_taskfile *tf = &qc->tf; 3411 struct scsi_cmnd *scmd = qc->scsicmd; 3412 const u8 *cdb = scmd->cmnd; 3413 u16 sect, fp = (u16)-1; 3414 u8 sa, options, bp = 0xff; 3415 u64 block; 3416 u32 n_block; 3417 3418 if (unlikely(scmd->cmd_len < 16)) { 3419 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3420 scmd->cmd_len); 3421 fp = 15; 3422 goto invalid_fld; 3423 } 3424 scsi_16_lba_len(cdb, &block, &n_block); 3425 if (n_block != scsi_bufflen(scmd)) { 3426 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3427 n_block, scsi_bufflen(scmd)); 3428 goto invalid_param_len; 3429 } 3430 sa = cdb[1] & 0x1f; 3431 if (sa != ZI_REPORT_ZONES) { 3432 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3433 fp = 1; 3434 goto invalid_fld; 3435 } 3436 /* 3437 * ZAC allows only for transfers in 512 byte blocks, 3438 * and uses a 16 bit value for the transfer count. 3439 */ 3440 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3441 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3442 goto invalid_param_len; 3443 } 3444 sect = n_block / 512; 3445 options = cdb[14] & 0xbf; 3446 3447 if (ata_ncq_enabled(qc->dev) && 3448 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3449 tf->protocol = ATA_PROT_NCQ; 3450 tf->command = ATA_CMD_FPDMA_RECV; 3451 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3452 tf->nsect = qc->hw_tag << 3; 3453 tf->feature = sect & 0xff; 3454 tf->hob_feature = (sect >> 8) & 0xff; 3455 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3456 } else { 3457 tf->command = ATA_CMD_ZAC_MGMT_IN; 3458 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3459 tf->protocol = ATA_PROT_DMA; 3460 tf->hob_feature = options; 3461 tf->hob_nsect = (sect >> 8) & 0xff; 3462 tf->nsect = sect & 0xff; 3463 } 3464 tf->device = ATA_LBA; 3465 tf->lbah = (block >> 16) & 0xff; 3466 tf->lbam = (block >> 8) & 0xff; 3467 tf->lbal = block & 0xff; 3468 tf->hob_lbah = (block >> 40) & 0xff; 3469 tf->hob_lbam = (block >> 32) & 0xff; 3470 tf->hob_lbal = (block >> 24) & 0xff; 3471 3472 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3473 qc->flags |= ATA_QCFLAG_RESULT_TF; 3474 3475 ata_qc_set_pc_nbytes(qc); 3476 3477 qc->complete_fn = ata_scsi_report_zones_complete; 3478 3479 return 0; 3480 3481 invalid_fld: 3482 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3483 return 1; 3484 3485 invalid_param_len: 3486 /* "Parameter list length error" */ 3487 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3488 return 1; 3489 } 3490 3491 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3492 { 3493 struct ata_taskfile *tf = &qc->tf; 3494 struct scsi_cmnd *scmd = qc->scsicmd; 3495 struct ata_device *dev = qc->dev; 3496 const u8 *cdb = scmd->cmnd; 3497 u8 all, sa; 3498 u64 block; 3499 u32 n_block; 3500 u16 fp = (u16)-1; 3501 3502 if (unlikely(scmd->cmd_len < 16)) { 3503 fp = 15; 3504 goto invalid_fld; 3505 } 3506 3507 sa = cdb[1] & 0x1f; 3508 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3509 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3510 fp = 1; 3511 goto invalid_fld; 3512 } 3513 3514 scsi_16_lba_len(cdb, &block, &n_block); 3515 if (n_block) { 3516 /* 3517 * ZAC MANAGEMENT OUT doesn't define any length 3518 */ 3519 goto invalid_param_len; 3520 } 3521 3522 all = cdb[14] & 0x1; 3523 if (all) { 3524 /* 3525 * Ignore the block address (zone ID) as defined by ZBC. 3526 */ 3527 block = 0; 3528 } else if (block >= dev->n_sectors) { 3529 /* 3530 * Block must be a valid zone ID (a zone start LBA). 3531 */ 3532 fp = 2; 3533 goto invalid_fld; 3534 } 3535 3536 if (ata_ncq_enabled(qc->dev) && 3537 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3538 tf->protocol = ATA_PROT_NCQ_NODATA; 3539 tf->command = ATA_CMD_NCQ_NON_DATA; 3540 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3541 tf->nsect = qc->hw_tag << 3; 3542 tf->auxiliary = sa | ((u16)all << 8); 3543 } else { 3544 tf->protocol = ATA_PROT_NODATA; 3545 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3546 tf->feature = sa; 3547 tf->hob_feature = all; 3548 } 3549 tf->lbah = (block >> 16) & 0xff; 3550 tf->lbam = (block >> 8) & 0xff; 3551 tf->lbal = block & 0xff; 3552 tf->hob_lbah = (block >> 40) & 0xff; 3553 tf->hob_lbam = (block >> 32) & 0xff; 3554 tf->hob_lbal = (block >> 24) & 0xff; 3555 tf->device = ATA_LBA; 3556 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3557 3558 return 0; 3559 3560 invalid_fld: 3561 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3562 return 1; 3563 invalid_param_len: 3564 /* "Parameter list length error" */ 3565 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3566 return 1; 3567 } 3568 3569 /** 3570 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3571 * @qc: Storage for translated ATA taskfile 3572 * @buf: input buffer 3573 * @len: number of valid bytes in the input buffer 3574 * @fp: out parameter for the failed field on error 3575 * 3576 * Prepare a taskfile to modify caching information for the device. 3577 * 3578 * LOCKING: 3579 * None. 3580 */ 3581 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3582 const u8 *buf, int len, u16 *fp) 3583 { 3584 struct ata_taskfile *tf = &qc->tf; 3585 struct ata_device *dev = qc->dev; 3586 u8 mpage[CACHE_MPAGE_LEN]; 3587 u8 wce; 3588 int i; 3589 3590 /* 3591 * The first two bytes of def_cache_mpage are a header, so offsets 3592 * in mpage are off by 2 compared to buf. Same for len. 3593 */ 3594 3595 if (len != CACHE_MPAGE_LEN - 2) { 3596 if (len < CACHE_MPAGE_LEN - 2) 3597 *fp = len; 3598 else 3599 *fp = CACHE_MPAGE_LEN - 2; 3600 return -EINVAL; 3601 } 3602 3603 wce = buf[0] & (1 << 2); 3604 3605 /* 3606 * Check that read-only bits are not modified. 3607 */ 3608 ata_msense_caching(dev->id, mpage, false); 3609 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3610 if (i == 0) 3611 continue; 3612 if (mpage[i + 2] != buf[i]) { 3613 *fp = i; 3614 return -EINVAL; 3615 } 3616 } 3617 3618 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3619 tf->protocol = ATA_PROT_NODATA; 3620 tf->nsect = 0; 3621 tf->command = ATA_CMD_SET_FEATURES; 3622 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3623 return 0; 3624 } 3625 3626 /** 3627 * ata_mselect_control - Simulate MODE SELECT for control page 3628 * @qc: Storage for translated ATA taskfile 3629 * @buf: input buffer 3630 * @len: number of valid bytes in the input buffer 3631 * @fp: out parameter for the failed field on error 3632 * 3633 * Prepare a taskfile to modify caching information for the device. 3634 * 3635 * LOCKING: 3636 * None. 3637 */ 3638 static int ata_mselect_control(struct ata_queued_cmd *qc, 3639 const u8 *buf, int len, u16 *fp) 3640 { 3641 struct ata_device *dev = qc->dev; 3642 u8 mpage[CONTROL_MPAGE_LEN]; 3643 u8 d_sense; 3644 int i; 3645 3646 /* 3647 * The first two bytes of def_control_mpage are a header, so offsets 3648 * in mpage are off by 2 compared to buf. Same for len. 3649 */ 3650 3651 if (len != CONTROL_MPAGE_LEN - 2) { 3652 if (len < CONTROL_MPAGE_LEN - 2) 3653 *fp = len; 3654 else 3655 *fp = CONTROL_MPAGE_LEN - 2; 3656 return -EINVAL; 3657 } 3658 3659 d_sense = buf[0] & (1 << 2); 3660 3661 /* 3662 * Check that read-only bits are not modified. 3663 */ 3664 ata_msense_control(dev, mpage, false); 3665 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3666 if (i == 0) 3667 continue; 3668 if (mpage[2 + i] != buf[i]) { 3669 *fp = i; 3670 return -EINVAL; 3671 } 3672 } 3673 if (d_sense & (1 << 2)) 3674 dev->flags |= ATA_DFLAG_D_SENSE; 3675 else 3676 dev->flags &= ~ATA_DFLAG_D_SENSE; 3677 return 0; 3678 } 3679 3680 /** 3681 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3682 * @qc: Storage for translated ATA taskfile 3683 * 3684 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3685 * Assume this is invoked for direct access devices (e.g. disks) only. 3686 * There should be no block descriptor for other device types. 3687 * 3688 * LOCKING: 3689 * spin_lock_irqsave(host lock) 3690 */ 3691 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3692 { 3693 struct scsi_cmnd *scmd = qc->scsicmd; 3694 const u8 *cdb = scmd->cmnd; 3695 const u8 *p; 3696 u8 pg, spg; 3697 unsigned six_byte, pg_len, hdr_len, bd_len; 3698 int len; 3699 u16 fp = (u16)-1; 3700 u8 bp = 0xff; 3701 3702 VPRINTK("ENTER\n"); 3703 3704 six_byte = (cdb[0] == MODE_SELECT); 3705 if (six_byte) { 3706 if (scmd->cmd_len < 5) { 3707 fp = 4; 3708 goto invalid_fld; 3709 } 3710 3711 len = cdb[4]; 3712 hdr_len = 4; 3713 } else { 3714 if (scmd->cmd_len < 9) { 3715 fp = 8; 3716 goto invalid_fld; 3717 } 3718 3719 len = (cdb[7] << 8) + cdb[8]; 3720 hdr_len = 8; 3721 } 3722 3723 /* We only support PF=1, SP=0. */ 3724 if ((cdb[1] & 0x11) != 0x10) { 3725 fp = 1; 3726 bp = (cdb[1] & 0x01) ? 1 : 5; 3727 goto invalid_fld; 3728 } 3729 3730 /* Test early for possible overrun. */ 3731 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3732 goto invalid_param_len; 3733 3734 p = page_address(sg_page(scsi_sglist(scmd))); 3735 3736 /* Move past header and block descriptors. */ 3737 if (len < hdr_len) 3738 goto invalid_param_len; 3739 3740 if (six_byte) 3741 bd_len = p[3]; 3742 else 3743 bd_len = (p[6] << 8) + p[7]; 3744 3745 len -= hdr_len; 3746 p += hdr_len; 3747 if (len < bd_len) 3748 goto invalid_param_len; 3749 if (bd_len != 0 && bd_len != 8) { 3750 fp = (six_byte) ? 3 : 6; 3751 fp += bd_len + hdr_len; 3752 goto invalid_param; 3753 } 3754 3755 len -= bd_len; 3756 p += bd_len; 3757 if (len == 0) 3758 goto skip; 3759 3760 /* Parse both possible formats for the mode page headers. */ 3761 pg = p[0] & 0x3f; 3762 if (p[0] & 0x40) { 3763 if (len < 4) 3764 goto invalid_param_len; 3765 3766 spg = p[1]; 3767 pg_len = (p[2] << 8) | p[3]; 3768 p += 4; 3769 len -= 4; 3770 } else { 3771 if (len < 2) 3772 goto invalid_param_len; 3773 3774 spg = 0; 3775 pg_len = p[1]; 3776 p += 2; 3777 len -= 2; 3778 } 3779 3780 /* 3781 * No mode subpages supported (yet) but asking for _all_ 3782 * subpages may be valid 3783 */ 3784 if (spg && (spg != ALL_SUB_MPAGES)) { 3785 fp = (p[0] & 0x40) ? 1 : 0; 3786 fp += hdr_len + bd_len; 3787 goto invalid_param; 3788 } 3789 if (pg_len > len) 3790 goto invalid_param_len; 3791 3792 switch (pg) { 3793 case CACHE_MPAGE: 3794 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3795 fp += hdr_len + bd_len; 3796 goto invalid_param; 3797 } 3798 break; 3799 case CONTROL_MPAGE: 3800 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 3801 fp += hdr_len + bd_len; 3802 goto invalid_param; 3803 } else { 3804 goto skip; /* No ATA command to send */ 3805 } 3806 break; 3807 default: /* invalid page code */ 3808 fp = bd_len + hdr_len; 3809 goto invalid_param; 3810 } 3811 3812 /* 3813 * Only one page has changeable data, so we only support setting one 3814 * page at a time. 3815 */ 3816 if (len > pg_len) 3817 goto invalid_param; 3818 3819 return 0; 3820 3821 invalid_fld: 3822 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3823 return 1; 3824 3825 invalid_param: 3826 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3827 return 1; 3828 3829 invalid_param_len: 3830 /* "Parameter list length error" */ 3831 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3832 return 1; 3833 3834 skip: 3835 scmd->result = SAM_STAT_GOOD; 3836 return 1; 3837 } 3838 3839 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 3840 { 3841 if (len == 0) 3842 return ATA_CMD_TRUSTED_NONDATA; 3843 else if (send) 3844 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 3845 else 3846 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 3847 } 3848 3849 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 3850 { 3851 struct scsi_cmnd *scmd = qc->scsicmd; 3852 const u8 *cdb = scmd->cmnd; 3853 struct ata_taskfile *tf = &qc->tf; 3854 u8 secp = cdb[1]; 3855 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 3856 u16 spsp = get_unaligned_be16(&cdb[2]); 3857 u32 len = get_unaligned_be32(&cdb[6]); 3858 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 3859 3860 /* 3861 * We don't support the ATA "security" protocol. 3862 */ 3863 if (secp == 0xef) { 3864 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 3865 return 1; 3866 } 3867 3868 if (cdb[4] & 7) { /* INC_512 */ 3869 if (len > 0xffff) { 3870 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3871 return 1; 3872 } 3873 } else { 3874 if (len > 0x01fffe00) { 3875 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 3876 return 1; 3877 } 3878 3879 /* convert to the sector-based ATA addressing */ 3880 len = (len + 511) / 512; 3881 } 3882 3883 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 3884 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 3885 if (send) 3886 tf->flags |= ATA_TFLAG_WRITE; 3887 tf->command = ata_scsi_trusted_op(len, send, dma); 3888 tf->feature = secp; 3889 tf->lbam = spsp & 0xff; 3890 tf->lbah = spsp >> 8; 3891 3892 if (len) { 3893 tf->nsect = len & 0xff; 3894 tf->lbal = len >> 8; 3895 } else { 3896 if (!send) 3897 tf->lbah = (1 << 7); 3898 } 3899 3900 ata_qc_set_pc_nbytes(qc); 3901 return 0; 3902 } 3903 3904 /** 3905 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 3906 * @qc: Command to be translated 3907 * 3908 * Translate a SCSI variable length CDB to specified commands. 3909 * It checks a service action value in CDB to call corresponding handler. 3910 * 3911 * RETURNS: 3912 * Zero on success, non-zero on failure 3913 * 3914 */ 3915 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 3916 { 3917 struct scsi_cmnd *scmd = qc->scsicmd; 3918 const u8 *cdb = scmd->cmnd; 3919 const u16 sa = get_unaligned_be16(&cdb[8]); 3920 3921 /* 3922 * if service action represents a ata pass-thru(32) command, 3923 * then pass it to ata_scsi_pass_thru handler. 3924 */ 3925 if (sa == ATA_32) 3926 return ata_scsi_pass_thru(qc); 3927 3928 /* unsupported service action */ 3929 return 1; 3930 } 3931 3932 /** 3933 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3934 * @dev: ATA device 3935 * @cmd: SCSI command opcode to consider 3936 * 3937 * Look up the SCSI command given, and determine whether the 3938 * SCSI command is to be translated or simulated. 3939 * 3940 * RETURNS: 3941 * Pointer to translation function if possible, %NULL if not. 3942 */ 3943 3944 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3945 { 3946 switch (cmd) { 3947 case READ_6: 3948 case READ_10: 3949 case READ_16: 3950 3951 case WRITE_6: 3952 case WRITE_10: 3953 case WRITE_16: 3954 return ata_scsi_rw_xlat; 3955 3956 case WRITE_SAME_16: 3957 return ata_scsi_write_same_xlat; 3958 3959 case SYNCHRONIZE_CACHE: 3960 if (ata_try_flush_cache(dev)) 3961 return ata_scsi_flush_xlat; 3962 break; 3963 3964 case VERIFY: 3965 case VERIFY_16: 3966 return ata_scsi_verify_xlat; 3967 3968 case ATA_12: 3969 case ATA_16: 3970 return ata_scsi_pass_thru; 3971 3972 case VARIABLE_LENGTH_CMD: 3973 return ata_scsi_var_len_cdb_xlat; 3974 3975 case MODE_SELECT: 3976 case MODE_SELECT_10: 3977 return ata_scsi_mode_select_xlat; 3978 break; 3979 3980 case ZBC_IN: 3981 return ata_scsi_zbc_in_xlat; 3982 3983 case ZBC_OUT: 3984 return ata_scsi_zbc_out_xlat; 3985 3986 case SECURITY_PROTOCOL_IN: 3987 case SECURITY_PROTOCOL_OUT: 3988 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 3989 break; 3990 return ata_scsi_security_inout_xlat; 3991 3992 case START_STOP: 3993 return ata_scsi_start_stop_xlat; 3994 } 3995 3996 return NULL; 3997 } 3998 3999 /** 4000 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 4001 * @ap: ATA port to which the command was being sent 4002 * @cmd: SCSI command to dump 4003 * 4004 * Prints the contents of a SCSI command via printk(). 4005 */ 4006 4007 void ata_scsi_dump_cdb(struct ata_port *ap, struct scsi_cmnd *cmd) 4008 { 4009 #ifdef ATA_VERBOSE_DEBUG 4010 struct scsi_device *scsidev = cmd->device; 4011 4012 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n", 4013 ap->print_id, 4014 scsidev->channel, scsidev->id, scsidev->lun, 4015 cmd->cmnd); 4016 #endif 4017 } 4018 4019 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) 4020 { 4021 u8 scsi_op = scmd->cmnd[0]; 4022 ata_xlat_func_t xlat_func; 4023 int rc = 0; 4024 4025 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4026 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 4027 goto bad_cdb_len; 4028 4029 xlat_func = ata_get_xlat_func(dev, scsi_op); 4030 } else { 4031 if (unlikely(!scmd->cmd_len)) 4032 goto bad_cdb_len; 4033 4034 xlat_func = NULL; 4035 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4036 /* relay SCSI command to ATAPI device */ 4037 int len = COMMAND_SIZE(scsi_op); 4038 if (unlikely(len > scmd->cmd_len || 4039 len > dev->cdb_len || 4040 scmd->cmd_len > ATAPI_CDB_LEN)) 4041 goto bad_cdb_len; 4042 4043 xlat_func = atapi_xlat; 4044 } else { 4045 /* ATA_16 passthru, treat as an ATA command */ 4046 if (unlikely(scmd->cmd_len > 16)) 4047 goto bad_cdb_len; 4048 4049 xlat_func = ata_get_xlat_func(dev, scsi_op); 4050 } 4051 } 4052 4053 if (xlat_func) 4054 rc = ata_scsi_translate(dev, scmd, xlat_func); 4055 else 4056 ata_scsi_simulate(dev, scmd); 4057 4058 return rc; 4059 4060 bad_cdb_len: 4061 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4062 scmd->cmd_len, scsi_op, dev->cdb_len); 4063 scmd->result = DID_ERROR << 16; 4064 scmd->scsi_done(scmd); 4065 return 0; 4066 } 4067 4068 /** 4069 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4070 * @shost: SCSI host of command to be sent 4071 * @cmd: SCSI command to be sent 4072 * 4073 * In some cases, this function translates SCSI commands into 4074 * ATA taskfiles, and queues the taskfiles to be sent to 4075 * hardware. In other cases, this function simulates a 4076 * SCSI device by evaluating and responding to certain 4077 * SCSI commands. This creates the overall effect of 4078 * ATA and ATAPI devices appearing as SCSI devices. 4079 * 4080 * LOCKING: 4081 * ATA host lock 4082 * 4083 * RETURNS: 4084 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4085 * 0 otherwise. 4086 */ 4087 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4088 { 4089 struct ata_port *ap; 4090 struct ata_device *dev; 4091 struct scsi_device *scsidev = cmd->device; 4092 int rc = 0; 4093 unsigned long irq_flags; 4094 4095 ap = ata_shost_to_port(shost); 4096 4097 spin_lock_irqsave(ap->lock, irq_flags); 4098 4099 ata_scsi_dump_cdb(ap, cmd); 4100 4101 dev = ata_scsi_find_dev(ap, scsidev); 4102 if (likely(dev)) 4103 rc = __ata_scsi_queuecmd(cmd, dev); 4104 else { 4105 cmd->result = (DID_BAD_TARGET << 16); 4106 cmd->scsi_done(cmd); 4107 } 4108 4109 spin_unlock_irqrestore(ap->lock, irq_flags); 4110 4111 return rc; 4112 } 4113 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 4114 4115 /** 4116 * ata_scsi_simulate - simulate SCSI command on ATA device 4117 * @dev: the target device 4118 * @cmd: SCSI command being sent to device. 4119 * 4120 * Interprets and directly executes a select list of SCSI commands 4121 * that can be handled internally. 4122 * 4123 * LOCKING: 4124 * spin_lock_irqsave(host lock) 4125 */ 4126 4127 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4128 { 4129 struct ata_scsi_args args; 4130 const u8 *scsicmd = cmd->cmnd; 4131 u8 tmp8; 4132 4133 args.dev = dev; 4134 args.id = dev->id; 4135 args.cmd = cmd; 4136 4137 switch(scsicmd[0]) { 4138 case INQUIRY: 4139 if (scsicmd[1] & 2) /* is CmdDt set? */ 4140 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4141 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4142 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4143 else switch (scsicmd[2]) { 4144 case 0x00: 4145 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4146 break; 4147 case 0x80: 4148 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4149 break; 4150 case 0x83: 4151 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4152 break; 4153 case 0x89: 4154 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4155 break; 4156 case 0xb0: 4157 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4158 break; 4159 case 0xb1: 4160 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4161 break; 4162 case 0xb2: 4163 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4164 break; 4165 case 0xb6: 4166 if (dev->flags & ATA_DFLAG_ZAC) { 4167 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4168 break; 4169 } 4170 /* Fallthrough */ 4171 default: 4172 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4173 break; 4174 } 4175 break; 4176 4177 case MODE_SENSE: 4178 case MODE_SENSE_10: 4179 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4180 break; 4181 4182 case READ_CAPACITY: 4183 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4184 break; 4185 4186 case SERVICE_ACTION_IN_16: 4187 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4188 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4189 else 4190 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4191 break; 4192 4193 case REPORT_LUNS: 4194 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4195 break; 4196 4197 case REQUEST_SENSE: 4198 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4199 cmd->result = (DRIVER_SENSE << 24); 4200 break; 4201 4202 /* if we reach this, then writeback caching is disabled, 4203 * turning this into a no-op. 4204 */ 4205 case SYNCHRONIZE_CACHE: 4206 /* fall through */ 4207 4208 /* no-op's, complete with success */ 4209 case REZERO_UNIT: 4210 case SEEK_6: 4211 case SEEK_10: 4212 case TEST_UNIT_READY: 4213 break; 4214 4215 case SEND_DIAGNOSTIC: 4216 tmp8 = scsicmd[1] & ~(1 << 3); 4217 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4218 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4219 break; 4220 4221 case MAINTENANCE_IN: 4222 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4223 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4224 else 4225 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4226 break; 4227 4228 /* all other commands */ 4229 default: 4230 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4231 /* "Invalid command operation code" */ 4232 break; 4233 } 4234 4235 cmd->scsi_done(cmd); 4236 } 4237 4238 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4239 { 4240 int i, rc; 4241 4242 for (i = 0; i < host->n_ports; i++) { 4243 struct ata_port *ap = host->ports[i]; 4244 struct Scsi_Host *shost; 4245 4246 rc = -ENOMEM; 4247 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4248 if (!shost) 4249 goto err_alloc; 4250 4251 shost->eh_noresume = 1; 4252 *(struct ata_port **)&shost->hostdata[0] = ap; 4253 ap->scsi_host = shost; 4254 4255 shost->transportt = ata_scsi_transport_template; 4256 shost->unique_id = ap->print_id; 4257 shost->max_id = 16; 4258 shost->max_lun = 1; 4259 shost->max_channel = 1; 4260 shost->max_cmd_len = 32; 4261 4262 /* Schedule policy is determined by ->qc_defer() 4263 * callback and it needs to see every deferred qc. 4264 * Set host_blocked to 1 to prevent SCSI midlayer from 4265 * automatically deferring requests. 4266 */ 4267 shost->max_host_blocked = 1; 4268 4269 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); 4270 if (rc) 4271 goto err_alloc; 4272 } 4273 4274 return 0; 4275 4276 err_alloc: 4277 while (--i >= 0) { 4278 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4279 4280 /* scsi_host_put() is in ata_devres_release() */ 4281 scsi_remove_host(shost); 4282 } 4283 return rc; 4284 } 4285 4286 #ifdef CONFIG_OF 4287 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4288 { 4289 struct scsi_device *sdev = dev->sdev; 4290 struct device *d = ap->host->dev; 4291 struct device_node *np = d->of_node; 4292 struct device_node *child; 4293 4294 for_each_available_child_of_node(np, child) { 4295 int ret; 4296 u32 val; 4297 4298 ret = of_property_read_u32(child, "reg", &val); 4299 if (ret) 4300 continue; 4301 if (val == dev->devno) { 4302 dev_dbg(d, "found matching device node\n"); 4303 sdev->sdev_gendev.of_node = child; 4304 return; 4305 } 4306 } 4307 } 4308 #else 4309 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) 4310 { 4311 } 4312 #endif 4313 4314 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4315 { 4316 int tries = 5; 4317 struct ata_device *last_failed_dev = NULL; 4318 struct ata_link *link; 4319 struct ata_device *dev; 4320 4321 repeat: 4322 ata_for_each_link(link, ap, EDGE) { 4323 ata_for_each_dev(dev, link, ENABLED) { 4324 struct scsi_device *sdev; 4325 int channel = 0, id = 0; 4326 4327 if (dev->sdev) 4328 continue; 4329 4330 if (ata_is_host_link(link)) 4331 id = dev->devno; 4332 else 4333 channel = link->pmp; 4334 4335 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4336 NULL); 4337 if (!IS_ERR(sdev)) { 4338 dev->sdev = sdev; 4339 ata_scsi_assign_ofnode(dev, ap); 4340 scsi_device_put(sdev); 4341 } else { 4342 dev->sdev = NULL; 4343 } 4344 } 4345 } 4346 4347 /* If we scanned while EH was in progress or allocation 4348 * failure occurred, scan would have failed silently. Check 4349 * whether all devices are attached. 4350 */ 4351 ata_for_each_link(link, ap, EDGE) { 4352 ata_for_each_dev(dev, link, ENABLED) { 4353 if (!dev->sdev) 4354 goto exit_loop; 4355 } 4356 } 4357 exit_loop: 4358 if (!link) 4359 return; 4360 4361 /* we're missing some SCSI devices */ 4362 if (sync) { 4363 /* If caller requested synchrnous scan && we've made 4364 * any progress, sleep briefly and repeat. 4365 */ 4366 if (dev != last_failed_dev) { 4367 msleep(100); 4368 last_failed_dev = dev; 4369 goto repeat; 4370 } 4371 4372 /* We might be failing to detect boot device, give it 4373 * a few more chances. 4374 */ 4375 if (--tries) { 4376 msleep(100); 4377 goto repeat; 4378 } 4379 4380 ata_port_err(ap, 4381 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4382 } 4383 4384 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4385 round_jiffies_relative(HZ)); 4386 } 4387 4388 /** 4389 * ata_scsi_offline_dev - offline attached SCSI device 4390 * @dev: ATA device to offline attached SCSI device for 4391 * 4392 * This function is called from ata_eh_hotplug() and responsible 4393 * for taking the SCSI device attached to @dev offline. This 4394 * function is called with host lock which protects dev->sdev 4395 * against clearing. 4396 * 4397 * LOCKING: 4398 * spin_lock_irqsave(host lock) 4399 * 4400 * RETURNS: 4401 * 1 if attached SCSI device exists, 0 otherwise. 4402 */ 4403 int ata_scsi_offline_dev(struct ata_device *dev) 4404 { 4405 if (dev->sdev) { 4406 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4407 return 1; 4408 } 4409 return 0; 4410 } 4411 4412 /** 4413 * ata_scsi_remove_dev - remove attached SCSI device 4414 * @dev: ATA device to remove attached SCSI device for 4415 * 4416 * This function is called from ata_eh_scsi_hotplug() and 4417 * responsible for removing the SCSI device attached to @dev. 4418 * 4419 * LOCKING: 4420 * Kernel thread context (may sleep). 4421 */ 4422 static void ata_scsi_remove_dev(struct ata_device *dev) 4423 { 4424 struct ata_port *ap = dev->link->ap; 4425 struct scsi_device *sdev; 4426 unsigned long flags; 4427 4428 /* Alas, we need to grab scan_mutex to ensure SCSI device 4429 * state doesn't change underneath us and thus 4430 * scsi_device_get() always succeeds. The mutex locking can 4431 * be removed if there is __scsi_device_get() interface which 4432 * increments reference counts regardless of device state. 4433 */ 4434 mutex_lock(&ap->scsi_host->scan_mutex); 4435 spin_lock_irqsave(ap->lock, flags); 4436 4437 /* clearing dev->sdev is protected by host lock */ 4438 sdev = dev->sdev; 4439 dev->sdev = NULL; 4440 4441 if (sdev) { 4442 /* If user initiated unplug races with us, sdev can go 4443 * away underneath us after the host lock and 4444 * scan_mutex are released. Hold onto it. 4445 */ 4446 if (scsi_device_get(sdev) == 0) { 4447 /* The following ensures the attached sdev is 4448 * offline on return from ata_scsi_offline_dev() 4449 * regardless it wins or loses the race 4450 * against this function. 4451 */ 4452 scsi_device_set_state(sdev, SDEV_OFFLINE); 4453 } else { 4454 WARN_ON(1); 4455 sdev = NULL; 4456 } 4457 } 4458 4459 spin_unlock_irqrestore(ap->lock, flags); 4460 mutex_unlock(&ap->scsi_host->scan_mutex); 4461 4462 if (sdev) { 4463 ata_dev_info(dev, "detaching (SCSI %s)\n", 4464 dev_name(&sdev->sdev_gendev)); 4465 4466 scsi_remove_device(sdev); 4467 scsi_device_put(sdev); 4468 } 4469 } 4470 4471 static void ata_scsi_handle_link_detach(struct ata_link *link) 4472 { 4473 struct ata_port *ap = link->ap; 4474 struct ata_device *dev; 4475 4476 ata_for_each_dev(dev, link, ALL) { 4477 unsigned long flags; 4478 4479 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4480 continue; 4481 4482 spin_lock_irqsave(ap->lock, flags); 4483 dev->flags &= ~ATA_DFLAG_DETACHED; 4484 spin_unlock_irqrestore(ap->lock, flags); 4485 4486 if (zpodd_dev_enabled(dev)) 4487 zpodd_exit(dev); 4488 4489 ata_scsi_remove_dev(dev); 4490 } 4491 } 4492 4493 /** 4494 * ata_scsi_media_change_notify - send media change event 4495 * @dev: Pointer to the disk device with media change event 4496 * 4497 * Tell the block layer to send a media change notification 4498 * event. 4499 * 4500 * LOCKING: 4501 * spin_lock_irqsave(host lock) 4502 */ 4503 void ata_scsi_media_change_notify(struct ata_device *dev) 4504 { 4505 if (dev->sdev) 4506 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4507 GFP_ATOMIC); 4508 } 4509 4510 /** 4511 * ata_scsi_hotplug - SCSI part of hotplug 4512 * @work: Pointer to ATA port to perform SCSI hotplug on 4513 * 4514 * Perform SCSI part of hotplug. It's executed from a separate 4515 * workqueue after EH completes. This is necessary because SCSI 4516 * hot plugging requires working EH and hot unplugging is 4517 * synchronized with hot plugging with a mutex. 4518 * 4519 * LOCKING: 4520 * Kernel thread context (may sleep). 4521 */ 4522 void ata_scsi_hotplug(struct work_struct *work) 4523 { 4524 struct ata_port *ap = 4525 container_of(work, struct ata_port, hotplug_task.work); 4526 int i; 4527 4528 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4529 DPRINTK("ENTER/EXIT - unloading\n"); 4530 return; 4531 } 4532 4533 DPRINTK("ENTER\n"); 4534 mutex_lock(&ap->scsi_scan_mutex); 4535 4536 /* Unplug detached devices. We cannot use link iterator here 4537 * because PMP links have to be scanned even if PMP is 4538 * currently not attached. Iterate manually. 4539 */ 4540 ata_scsi_handle_link_detach(&ap->link); 4541 if (ap->pmp_link) 4542 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4543 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4544 4545 /* scan for new ones */ 4546 ata_scsi_scan_host(ap, 0); 4547 4548 mutex_unlock(&ap->scsi_scan_mutex); 4549 DPRINTK("EXIT\n"); 4550 } 4551 4552 /** 4553 * ata_scsi_user_scan - indication for user-initiated bus scan 4554 * @shost: SCSI host to scan 4555 * @channel: Channel to scan 4556 * @id: ID to scan 4557 * @lun: LUN to scan 4558 * 4559 * This function is called when user explicitly requests bus 4560 * scan. Set probe pending flag and invoke EH. 4561 * 4562 * LOCKING: 4563 * SCSI layer (we don't care) 4564 * 4565 * RETURNS: 4566 * Zero. 4567 */ 4568 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4569 unsigned int id, u64 lun) 4570 { 4571 struct ata_port *ap = ata_shost_to_port(shost); 4572 unsigned long flags; 4573 int devno, rc = 0; 4574 4575 if (!ap->ops->error_handler) 4576 return -EOPNOTSUPP; 4577 4578 if (lun != SCAN_WILD_CARD && lun) 4579 return -EINVAL; 4580 4581 if (!sata_pmp_attached(ap)) { 4582 if (channel != SCAN_WILD_CARD && channel) 4583 return -EINVAL; 4584 devno = id; 4585 } else { 4586 if (id != SCAN_WILD_CARD && id) 4587 return -EINVAL; 4588 devno = channel; 4589 } 4590 4591 spin_lock_irqsave(ap->lock, flags); 4592 4593 if (devno == SCAN_WILD_CARD) { 4594 struct ata_link *link; 4595 4596 ata_for_each_link(link, ap, EDGE) { 4597 struct ata_eh_info *ehi = &link->eh_info; 4598 ehi->probe_mask |= ATA_ALL_DEVICES; 4599 ehi->action |= ATA_EH_RESET; 4600 } 4601 } else { 4602 struct ata_device *dev = ata_find_dev(ap, devno); 4603 4604 if (dev) { 4605 struct ata_eh_info *ehi = &dev->link->eh_info; 4606 ehi->probe_mask |= 1 << dev->devno; 4607 ehi->action |= ATA_EH_RESET; 4608 } else 4609 rc = -EINVAL; 4610 } 4611 4612 if (rc == 0) { 4613 ata_port_schedule_eh(ap); 4614 spin_unlock_irqrestore(ap->lock, flags); 4615 ata_port_wait_eh(ap); 4616 } else 4617 spin_unlock_irqrestore(ap->lock, flags); 4618 4619 return rc; 4620 } 4621 4622 /** 4623 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4624 * @work: Pointer to ATA port to perform scsi_rescan_device() 4625 * 4626 * After ATA pass thru (SAT) commands are executed successfully, 4627 * libata need to propagate the changes to SCSI layer. 4628 * 4629 * LOCKING: 4630 * Kernel thread context (may sleep). 4631 */ 4632 void ata_scsi_dev_rescan(struct work_struct *work) 4633 { 4634 struct ata_port *ap = 4635 container_of(work, struct ata_port, scsi_rescan_task); 4636 struct ata_link *link; 4637 struct ata_device *dev; 4638 unsigned long flags; 4639 4640 mutex_lock(&ap->scsi_scan_mutex); 4641 spin_lock_irqsave(ap->lock, flags); 4642 4643 ata_for_each_link(link, ap, EDGE) { 4644 ata_for_each_dev(dev, link, ENABLED) { 4645 struct scsi_device *sdev = dev->sdev; 4646 4647 if (!sdev) 4648 continue; 4649 if (scsi_device_get(sdev)) 4650 continue; 4651 4652 spin_unlock_irqrestore(ap->lock, flags); 4653 scsi_rescan_device(&(sdev->sdev_gendev)); 4654 scsi_device_put(sdev); 4655 spin_lock_irqsave(ap->lock, flags); 4656 } 4657 } 4658 4659 spin_unlock_irqrestore(ap->lock, flags); 4660 mutex_unlock(&ap->scsi_scan_mutex); 4661 } 4662