1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * libata-scsi.c - helper library for ATA 4 * 5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 6 * Copyright 2003-2004 Jeff Garzik 7 * 8 * libata documentation is available via 'make {ps|pdf}docs', 9 * as Documentation/driver-api/libata.rst 10 * 11 * Hardware documentation available from 12 * - http://www.t10.org/ 13 * - http://www.t13.org/ 14 */ 15 16 #include <linux/compat.h> 17 #include <linux/slab.h> 18 #include <linux/kernel.h> 19 #include <linux/blkdev.h> 20 #include <linux/spinlock.h> 21 #include <linux/export.h> 22 #include <scsi/scsi.h> 23 #include <scsi/scsi_host.h> 24 #include <scsi/scsi_cmnd.h> 25 #include <scsi/scsi_eh.h> 26 #include <scsi/scsi_device.h> 27 #include <scsi/scsi_tcq.h> 28 #include <scsi/scsi_transport.h> 29 #include <linux/libata.h> 30 #include <linux/hdreg.h> 31 #include <linux/uaccess.h> 32 #include <linux/suspend.h> 33 #include <asm/unaligned.h> 34 #include <linux/ioprio.h> 35 #include <linux/of.h> 36 37 #include "libata.h" 38 #include "libata-transport.h" 39 40 #define ATA_SCSI_RBUF_SIZE 576 41 42 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 43 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 44 45 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 46 47 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 48 const struct scsi_device *scsidev); 49 50 #define RW_RECOVERY_MPAGE 0x1 51 #define RW_RECOVERY_MPAGE_LEN 12 52 #define CACHE_MPAGE 0x8 53 #define CACHE_MPAGE_LEN 20 54 #define CONTROL_MPAGE 0xa 55 #define CONTROL_MPAGE_LEN 12 56 #define ALL_MPAGES 0x3f 57 #define ALL_SUB_MPAGES 0xff 58 59 60 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 61 RW_RECOVERY_MPAGE, 62 RW_RECOVERY_MPAGE_LEN - 2, 63 (1 << 7), /* AWRE */ 64 0, /* read retry count */ 65 0, 0, 0, 0, 66 0, /* write retry count */ 67 0, 0, 0 68 }; 69 70 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 71 CACHE_MPAGE, 72 CACHE_MPAGE_LEN - 2, 73 0, /* contains WCE, needs to be 0 for logic */ 74 0, 0, 0, 0, 0, 0, 0, 0, 0, 75 0, /* contains DRA, needs to be 0 for logic */ 76 0, 0, 0, 0, 0, 0, 0 77 }; 78 79 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 80 CONTROL_MPAGE, 81 CONTROL_MPAGE_LEN - 2, 82 2, /* DSENSE=0, GLTSD=1 */ 83 0, /* [QAM+QERR may be 1, see 05-359r1] */ 84 0, 0, 0, 0, 0xff, 0xff, 85 0, 30 /* extended self test time, see 05-359r1 */ 86 }; 87 88 static ssize_t ata_scsi_park_show(struct device *device, 89 struct device_attribute *attr, char *buf) 90 { 91 struct scsi_device *sdev = to_scsi_device(device); 92 struct ata_port *ap; 93 struct ata_link *link; 94 struct ata_device *dev; 95 unsigned long now; 96 unsigned int msecs; 97 int rc = 0; 98 99 ap = ata_shost_to_port(sdev->host); 100 101 spin_lock_irq(ap->lock); 102 dev = ata_scsi_find_dev(ap, sdev); 103 if (!dev) { 104 rc = -ENODEV; 105 goto unlock; 106 } 107 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 108 rc = -EOPNOTSUPP; 109 goto unlock; 110 } 111 112 link = dev->link; 113 now = jiffies; 114 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 115 link->eh_context.unloaded_mask & (1 << dev->devno) && 116 time_after(dev->unpark_deadline, now)) 117 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 118 else 119 msecs = 0; 120 121 unlock: 122 spin_unlock_irq(ap->lock); 123 124 return rc ? rc : snprintf(buf, 20, "%u\n", msecs); 125 } 126 127 static ssize_t ata_scsi_park_store(struct device *device, 128 struct device_attribute *attr, 129 const char *buf, size_t len) 130 { 131 struct scsi_device *sdev = to_scsi_device(device); 132 struct ata_port *ap; 133 struct ata_device *dev; 134 long int input; 135 unsigned long flags; 136 int rc; 137 138 rc = kstrtol(buf, 10, &input); 139 if (rc) 140 return rc; 141 if (input < -2) 142 return -EINVAL; 143 if (input > ATA_TMOUT_MAX_PARK) { 144 rc = -EOVERFLOW; 145 input = ATA_TMOUT_MAX_PARK; 146 } 147 148 ap = ata_shost_to_port(sdev->host); 149 150 spin_lock_irqsave(ap->lock, flags); 151 dev = ata_scsi_find_dev(ap, sdev); 152 if (unlikely(!dev)) { 153 rc = -ENODEV; 154 goto unlock; 155 } 156 if (dev->class != ATA_DEV_ATA && 157 dev->class != ATA_DEV_ZAC) { 158 rc = -EOPNOTSUPP; 159 goto unlock; 160 } 161 162 if (input >= 0) { 163 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 164 rc = -EOPNOTSUPP; 165 goto unlock; 166 } 167 168 dev->unpark_deadline = ata_deadline(jiffies, input); 169 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 170 ata_port_schedule_eh(ap); 171 complete(&ap->park_req_pending); 172 } else { 173 switch (input) { 174 case -1: 175 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 176 break; 177 case -2: 178 dev->flags |= ATA_DFLAG_NO_UNLOAD; 179 break; 180 } 181 } 182 unlock: 183 spin_unlock_irqrestore(ap->lock, flags); 184 185 return rc ? rc : len; 186 } 187 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 188 ata_scsi_park_show, ata_scsi_park_store); 189 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 190 191 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 192 u8 sk, u8 asc, u8 ascq) 193 { 194 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 195 196 if (!cmd) 197 return; 198 199 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 200 201 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq); 202 } 203 204 void ata_scsi_set_sense_information(struct ata_device *dev, 205 struct scsi_cmnd *cmd, 206 const struct ata_taskfile *tf) 207 { 208 u64 information; 209 210 if (!cmd) 211 return; 212 213 information = ata_tf_read_block(tf, dev); 214 if (information == U64_MAX) 215 return; 216 217 scsi_set_sense_information(cmd->sense_buffer, 218 SCSI_SENSE_BUFFERSIZE, information); 219 } 220 221 static void ata_scsi_set_invalid_field(struct ata_device *dev, 222 struct scsi_cmnd *cmd, u16 field, u8 bit) 223 { 224 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 225 /* "Invalid field in CDB" */ 226 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 227 field, bit, 1); 228 } 229 230 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 231 struct scsi_cmnd *cmd, u16 field) 232 { 233 /* "Invalid field in parameter list" */ 234 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 235 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 236 field, 0xff, 0); 237 } 238 239 struct device_attribute *ata_common_sdev_attrs[] = { 240 &dev_attr_unload_heads, 241 NULL 242 }; 243 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); 244 245 /** 246 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 247 * @sdev: SCSI device for which BIOS geometry is to be determined 248 * @bdev: block device associated with @sdev 249 * @capacity: capacity of SCSI device 250 * @geom: location to which geometry will be output 251 * 252 * Generic bios head/sector/cylinder calculator 253 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 254 * mapping. Some situations may arise where the disk is not 255 * bootable if this is not used. 256 * 257 * LOCKING: 258 * Defined by the SCSI layer. We don't really care. 259 * 260 * RETURNS: 261 * Zero. 262 */ 263 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 264 sector_t capacity, int geom[]) 265 { 266 geom[0] = 255; 267 geom[1] = 63; 268 sector_div(capacity, 255*63); 269 geom[2] = capacity; 270 271 return 0; 272 } 273 EXPORT_SYMBOL_GPL(ata_std_bios_param); 274 275 /** 276 * ata_scsi_unlock_native_capacity - unlock native capacity 277 * @sdev: SCSI device to adjust device capacity for 278 * 279 * This function is called if a partition on @sdev extends beyond 280 * the end of the device. It requests EH to unlock HPA. 281 * 282 * LOCKING: 283 * Defined by the SCSI layer. Might sleep. 284 */ 285 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 286 { 287 struct ata_port *ap = ata_shost_to_port(sdev->host); 288 struct ata_device *dev; 289 unsigned long flags; 290 291 spin_lock_irqsave(ap->lock, flags); 292 293 dev = ata_scsi_find_dev(ap, sdev); 294 if (dev && dev->n_sectors < dev->n_native_sectors) { 295 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 296 dev->link->eh_info.action |= ATA_EH_RESET; 297 ata_port_schedule_eh(ap); 298 } 299 300 spin_unlock_irqrestore(ap->lock, flags); 301 ata_port_wait_eh(ap); 302 } 303 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 304 305 /** 306 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 307 * @ap: target port 308 * @sdev: SCSI device to get identify data for 309 * @arg: User buffer area for identify data 310 * 311 * LOCKING: 312 * Defined by the SCSI layer. We don't really care. 313 * 314 * RETURNS: 315 * Zero on success, negative errno on error. 316 */ 317 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 318 void __user *arg) 319 { 320 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 321 u16 __user *dst = arg; 322 char buf[40]; 323 324 if (!dev) 325 return -ENOMSG; 326 327 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 328 return -EFAULT; 329 330 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 331 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 332 return -EFAULT; 333 334 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 335 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 336 return -EFAULT; 337 338 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 339 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 340 return -EFAULT; 341 342 return 0; 343 } 344 345 /** 346 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 347 * @scsidev: Device to which we are issuing command 348 * @arg: User provided data for issuing command 349 * 350 * LOCKING: 351 * Defined by the SCSI layer. We don't really care. 352 * 353 * RETURNS: 354 * Zero on success, negative errno on error. 355 */ 356 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 357 { 358 int rc = 0; 359 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 360 u8 scsi_cmd[MAX_COMMAND_SIZE]; 361 u8 args[4], *argbuf = NULL; 362 int argsize = 0; 363 enum dma_data_direction data_dir; 364 struct scsi_sense_hdr sshdr; 365 int cmd_result; 366 367 if (arg == NULL) 368 return -EINVAL; 369 370 if (copy_from_user(args, arg, sizeof(args))) 371 return -EFAULT; 372 373 memset(sensebuf, 0, sizeof(sensebuf)); 374 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 375 376 if (args[3]) { 377 argsize = ATA_SECT_SIZE * args[3]; 378 argbuf = kmalloc(argsize, GFP_KERNEL); 379 if (argbuf == NULL) { 380 rc = -ENOMEM; 381 goto error; 382 } 383 384 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 385 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 386 block count in sector count field */ 387 data_dir = DMA_FROM_DEVICE; 388 } else { 389 scsi_cmd[1] = (3 << 1); /* Non-data */ 390 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 391 data_dir = DMA_NONE; 392 } 393 394 scsi_cmd[0] = ATA_16; 395 396 scsi_cmd[4] = args[2]; 397 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 398 scsi_cmd[6] = args[3]; 399 scsi_cmd[8] = args[1]; 400 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 401 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 402 } else { 403 scsi_cmd[6] = args[1]; 404 } 405 scsi_cmd[14] = args[0]; 406 407 /* Good values for timeout and retries? Values below 408 from scsi_ioctl_send_command() for default case... */ 409 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 410 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 411 412 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 413 u8 *desc = sensebuf + 8; 414 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 415 416 /* If we set cc then ATA pass-through will cause a 417 * check condition even if no error. Filter that. */ 418 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 419 if (sshdr.sense_key == RECOVERED_ERROR && 420 sshdr.asc == 0 && sshdr.ascq == 0x1d) 421 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 422 } 423 424 /* Send userspace a few ATA registers (same as drivers/ide) */ 425 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 426 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 427 args[0] = desc[13]; /* status */ 428 args[1] = desc[3]; /* error */ 429 args[2] = desc[5]; /* sector count (0:7) */ 430 if (copy_to_user(arg, args, sizeof(args))) 431 rc = -EFAULT; 432 } 433 } 434 435 436 if (cmd_result) { 437 rc = -EIO; 438 goto error; 439 } 440 441 if ((argbuf) 442 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 443 rc = -EFAULT; 444 error: 445 kfree(argbuf); 446 return rc; 447 } 448 449 /** 450 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 451 * @scsidev: Device to which we are issuing command 452 * @arg: User provided data for issuing command 453 * 454 * LOCKING: 455 * Defined by the SCSI layer. We don't really care. 456 * 457 * RETURNS: 458 * Zero on success, negative errno on error. 459 */ 460 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 461 { 462 int rc = 0; 463 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 464 u8 scsi_cmd[MAX_COMMAND_SIZE]; 465 u8 args[7]; 466 struct scsi_sense_hdr sshdr; 467 int cmd_result; 468 469 if (arg == NULL) 470 return -EINVAL; 471 472 if (copy_from_user(args, arg, sizeof(args))) 473 return -EFAULT; 474 475 memset(sensebuf, 0, sizeof(sensebuf)); 476 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 477 scsi_cmd[0] = ATA_16; 478 scsi_cmd[1] = (3 << 1); /* Non-data */ 479 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 480 scsi_cmd[4] = args[1]; 481 scsi_cmd[6] = args[2]; 482 scsi_cmd[8] = args[3]; 483 scsi_cmd[10] = args[4]; 484 scsi_cmd[12] = args[5]; 485 scsi_cmd[13] = args[6] & 0x4f; 486 scsi_cmd[14] = args[0]; 487 488 /* Good values for timeout and retries? Values below 489 from scsi_ioctl_send_command() for default case... */ 490 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 491 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 492 493 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 494 u8 *desc = sensebuf + 8; 495 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 496 497 /* If we set cc then ATA pass-through will cause a 498 * check condition even if no error. Filter that. */ 499 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 500 if (sshdr.sense_key == RECOVERED_ERROR && 501 sshdr.asc == 0 && sshdr.ascq == 0x1d) 502 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 503 } 504 505 /* Send userspace ATA registers */ 506 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 507 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 508 args[0] = desc[13]; /* status */ 509 args[1] = desc[3]; /* error */ 510 args[2] = desc[5]; /* sector count (0:7) */ 511 args[3] = desc[7]; /* lbal */ 512 args[4] = desc[9]; /* lbam */ 513 args[5] = desc[11]; /* lbah */ 514 args[6] = desc[12]; /* select */ 515 if (copy_to_user(arg, args, sizeof(args))) 516 rc = -EFAULT; 517 } 518 } 519 520 if (cmd_result) { 521 rc = -EIO; 522 goto error; 523 } 524 525 error: 526 return rc; 527 } 528 529 static int ata_ioc32(struct ata_port *ap) 530 { 531 if (ap->flags & ATA_FLAG_PIO_DMA) 532 return 1; 533 if (ap->pflags & ATA_PFLAG_PIO32) 534 return 1; 535 return 0; 536 } 537 538 /* 539 * This handles both native and compat commands, so anything added 540 * here must have a compatible argument, or check in_compat_syscall() 541 */ 542 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 543 unsigned int cmd, void __user *arg) 544 { 545 unsigned long val; 546 int rc = -EINVAL; 547 unsigned long flags; 548 549 switch (cmd) { 550 case HDIO_GET_32BIT: 551 spin_lock_irqsave(ap->lock, flags); 552 val = ata_ioc32(ap); 553 spin_unlock_irqrestore(ap->lock, flags); 554 #ifdef CONFIG_COMPAT 555 if (in_compat_syscall()) 556 return put_user(val, (compat_ulong_t __user *)arg); 557 #endif 558 return put_user(val, (unsigned long __user *)arg); 559 560 case HDIO_SET_32BIT: 561 val = (unsigned long) arg; 562 rc = 0; 563 spin_lock_irqsave(ap->lock, flags); 564 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 565 if (val) 566 ap->pflags |= ATA_PFLAG_PIO32; 567 else 568 ap->pflags &= ~ATA_PFLAG_PIO32; 569 } else { 570 if (val != ata_ioc32(ap)) 571 rc = -EINVAL; 572 } 573 spin_unlock_irqrestore(ap->lock, flags); 574 return rc; 575 576 case HDIO_GET_IDENTITY: 577 return ata_get_identity(ap, scsidev, arg); 578 579 case HDIO_DRIVE_CMD: 580 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 581 return -EACCES; 582 return ata_cmd_ioctl(scsidev, arg); 583 584 case HDIO_DRIVE_TASK: 585 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 586 return -EACCES; 587 return ata_task_ioctl(scsidev, arg); 588 589 default: 590 rc = -ENOTTY; 591 break; 592 } 593 594 return rc; 595 } 596 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 597 598 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 599 void __user *arg) 600 { 601 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 602 scsidev, cmd, arg); 603 } 604 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 605 606 /** 607 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 608 * @dev: ATA device to which the new command is attached 609 * @cmd: SCSI command that originated this ATA command 610 * 611 * Obtain a reference to an unused ata_queued_cmd structure, 612 * which is the basic libata structure representing a single 613 * ATA command sent to the hardware. 614 * 615 * If a command was available, fill in the SCSI-specific 616 * portions of the structure with information on the 617 * current command. 618 * 619 * LOCKING: 620 * spin_lock_irqsave(host lock) 621 * 622 * RETURNS: 623 * Command allocated, or %NULL if none available. 624 */ 625 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 626 struct scsi_cmnd *cmd) 627 { 628 struct ata_queued_cmd *qc; 629 630 qc = ata_qc_new_init(dev, cmd->request->tag); 631 if (qc) { 632 qc->scsicmd = cmd; 633 qc->scsidone = cmd->scsi_done; 634 635 qc->sg = scsi_sglist(cmd); 636 qc->n_elem = scsi_sg_count(cmd); 637 638 if (cmd->request->rq_flags & RQF_QUIET) 639 qc->flags |= ATA_QCFLAG_QUIET; 640 } else { 641 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 642 cmd->scsi_done(cmd); 643 } 644 645 return qc; 646 } 647 648 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 649 { 650 struct scsi_cmnd *scmd = qc->scsicmd; 651 652 qc->extrabytes = scmd->extra_len; 653 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 654 } 655 656 /** 657 * ata_dump_status - user friendly display of error info 658 * @id: id of the port in question 659 * @tf: ptr to filled out taskfile 660 * 661 * Decode and dump the ATA error/status registers for the user so 662 * that they have some idea what really happened at the non 663 * make-believe layer. 664 * 665 * LOCKING: 666 * inherited from caller 667 */ 668 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 669 { 670 u8 stat = tf->command, err = tf->feature; 671 672 pr_warn("ata%u: status=0x%02x { ", id, stat); 673 if (stat & ATA_BUSY) { 674 pr_cont("Busy }\n"); /* Data is not valid in this case */ 675 } else { 676 if (stat & ATA_DRDY) pr_cont("DriveReady "); 677 if (stat & ATA_DF) pr_cont("DeviceFault "); 678 if (stat & ATA_DSC) pr_cont("SeekComplete "); 679 if (stat & ATA_DRQ) pr_cont("DataRequest "); 680 if (stat & ATA_CORR) pr_cont("CorrectedError "); 681 if (stat & ATA_SENSE) pr_cont("Sense "); 682 if (stat & ATA_ERR) pr_cont("Error "); 683 pr_cont("}\n"); 684 685 if (err) { 686 pr_warn("ata%u: error=0x%02x { ", id, err); 687 if (err & ATA_ABORTED) pr_cont("DriveStatusError "); 688 if (err & ATA_ICRC) { 689 if (err & ATA_ABORTED) 690 pr_cont("BadCRC "); 691 else pr_cont("Sector "); 692 } 693 if (err & ATA_UNC) pr_cont("UncorrectableError "); 694 if (err & ATA_IDNF) pr_cont("SectorIdNotFound "); 695 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound "); 696 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound "); 697 pr_cont("}\n"); 698 } 699 } 700 } 701 702 /** 703 * ata_to_sense_error - convert ATA error to SCSI error 704 * @id: ATA device number 705 * @drv_stat: value contained in ATA status register 706 * @drv_err: value contained in ATA error register 707 * @sk: the sense key we'll fill out 708 * @asc: the additional sense code we'll fill out 709 * @ascq: the additional sense code qualifier we'll fill out 710 * @verbose: be verbose 711 * 712 * Converts an ATA error into a SCSI error. Fill out pointers to 713 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 714 * format sense blocks. 715 * 716 * LOCKING: 717 * spin_lock_irqsave(host lock) 718 */ 719 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 720 u8 *asc, u8 *ascq, int verbose) 721 { 722 int i; 723 724 /* Based on the 3ware driver translation table */ 725 static const unsigned char sense_table[][4] = { 726 /* BBD|ECC|ID|MAR */ 727 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 728 // Device busy Aborted command 729 /* BBD|ECC|ID */ 730 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 731 // Device busy Aborted command 732 /* ECC|MC|MARK */ 733 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 734 // Device fault Hardware error 735 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 736 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 737 // Data CRC error SCSI parity error 738 /* MC|ID|ABRT|TRK0|MARK */ 739 {0x37, NOT_READY, 0x04, 0x00}, 740 // Unit offline Not ready 741 /* MCR|MARK */ 742 {0x09, NOT_READY, 0x04, 0x00}, 743 // Unrecovered disk error Not ready 744 /* Bad address mark */ 745 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 746 // Address mark not found for data field 747 /* TRK0 - Track 0 not found */ 748 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 749 // Hardware error 750 /* Abort: 0x04 is not translated here, see below */ 751 /* Media change request */ 752 {0x08, NOT_READY, 0x04, 0x00}, 753 // FIXME: faking offline 754 /* SRV/IDNF - ID not found */ 755 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 756 // Logical address out of range 757 /* MC - Media Changed */ 758 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 759 // Not ready to ready change, medium may have changed 760 /* ECC - Uncorrectable ECC error */ 761 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 762 // Unrecovered read error 763 /* BBD - block marked bad */ 764 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 765 // Block marked bad Medium error, unrecovered read error 766 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 767 }; 768 static const unsigned char stat_table[][4] = { 769 /* Must be first because BUSY means no other bits valid */ 770 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 771 // Busy, fake parity for now 772 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 773 // Device ready, unaligned write command 774 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 775 // Device fault, internal target failure 776 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 777 // Timed out in xfer, fake parity for now 778 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 779 // Recovered ECC error Medium error, recovered 780 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 781 }; 782 783 /* 784 * Is this an error we can process/parse 785 */ 786 if (drv_stat & ATA_BUSY) { 787 drv_err = 0; /* Ignore the err bits, they're invalid */ 788 } 789 790 if (drv_err) { 791 /* Look for drv_err */ 792 for (i = 0; sense_table[i][0] != 0xFF; i++) { 793 /* Look for best matches first */ 794 if ((sense_table[i][0] & drv_err) == 795 sense_table[i][0]) { 796 *sk = sense_table[i][1]; 797 *asc = sense_table[i][2]; 798 *ascq = sense_table[i][3]; 799 goto translate_done; 800 } 801 } 802 } 803 804 /* 805 * Fall back to interpreting status bits. Note that if the drv_err 806 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 807 * is not descriptive enough. 808 */ 809 for (i = 0; stat_table[i][0] != 0xFF; i++) { 810 if (stat_table[i][0] & drv_stat) { 811 *sk = stat_table[i][1]; 812 *asc = stat_table[i][2]; 813 *ascq = stat_table[i][3]; 814 goto translate_done; 815 } 816 } 817 818 /* 819 * We need a sensible error return here, which is tricky, and one 820 * that won't cause people to do things like return a disk wrongly. 821 */ 822 *sk = ABORTED_COMMAND; 823 *asc = 0x00; 824 *ascq = 0x00; 825 826 translate_done: 827 if (verbose) 828 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 829 id, drv_stat, drv_err, *sk, *asc, *ascq); 830 return; 831 } 832 833 /* 834 * ata_gen_passthru_sense - Generate check condition sense block. 835 * @qc: Command that completed. 836 * 837 * This function is specific to the ATA descriptor format sense 838 * block specified for the ATA pass through commands. Regardless 839 * of whether the command errored or not, return a sense 840 * block. Copy all controller registers into the sense 841 * block. If there was no error, we get the request from an ATA 842 * passthrough command, so we use the following sense data: 843 * sk = RECOVERED ERROR 844 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 845 * 846 * 847 * LOCKING: 848 * None. 849 */ 850 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 851 { 852 struct scsi_cmnd *cmd = qc->scsicmd; 853 struct ata_taskfile *tf = &qc->result_tf; 854 unsigned char *sb = cmd->sense_buffer; 855 unsigned char *desc = sb + 8; 856 int verbose = qc->ap->ops->error_handler == NULL; 857 u8 sense_key, asc, ascq; 858 859 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 860 861 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 862 863 /* 864 * Use ata_to_sense_error() to map status register bits 865 * onto sense key, asc & ascq. 866 */ 867 if (qc->err_mask || 868 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 869 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 870 &sense_key, &asc, &ascq, verbose); 871 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 872 } else { 873 /* 874 * ATA PASS-THROUGH INFORMATION AVAILABLE 875 * Always in descriptor format sense. 876 */ 877 scsi_build_sense_buffer(1, cmd->sense_buffer, 878 RECOVERED_ERROR, 0, 0x1D); 879 } 880 881 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 882 u8 len; 883 884 /* descriptor format */ 885 len = sb[7]; 886 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 887 if (!desc) { 888 if (SCSI_SENSE_BUFFERSIZE < len + 14) 889 return; 890 sb[7] = len + 14; 891 desc = sb + 8 + len; 892 } 893 desc[0] = 9; 894 desc[1] = 12; 895 /* 896 * Copy registers into sense buffer. 897 */ 898 desc[2] = 0x00; 899 desc[3] = tf->feature; /* == error reg */ 900 desc[5] = tf->nsect; 901 desc[7] = tf->lbal; 902 desc[9] = tf->lbam; 903 desc[11] = tf->lbah; 904 desc[12] = tf->device; 905 desc[13] = tf->command; /* == status reg */ 906 907 /* 908 * Fill in Extend bit, and the high order bytes 909 * if applicable. 910 */ 911 if (tf->flags & ATA_TFLAG_LBA48) { 912 desc[2] |= 0x01; 913 desc[4] = tf->hob_nsect; 914 desc[6] = tf->hob_lbal; 915 desc[8] = tf->hob_lbam; 916 desc[10] = tf->hob_lbah; 917 } 918 } else { 919 /* Fixed sense format */ 920 desc[0] = tf->feature; 921 desc[1] = tf->command; /* status */ 922 desc[2] = tf->device; 923 desc[3] = tf->nsect; 924 desc[7] = 0; 925 if (tf->flags & ATA_TFLAG_LBA48) { 926 desc[8] |= 0x80; 927 if (tf->hob_nsect) 928 desc[8] |= 0x40; 929 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 930 desc[8] |= 0x20; 931 } 932 desc[9] = tf->lbal; 933 desc[10] = tf->lbam; 934 desc[11] = tf->lbah; 935 } 936 } 937 938 /** 939 * ata_gen_ata_sense - generate a SCSI fixed sense block 940 * @qc: Command that we are erroring out 941 * 942 * Generate sense block for a failed ATA command @qc. Descriptor 943 * format is used to accommodate LBA48 block address. 944 * 945 * LOCKING: 946 * None. 947 */ 948 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 949 { 950 struct ata_device *dev = qc->dev; 951 struct scsi_cmnd *cmd = qc->scsicmd; 952 struct ata_taskfile *tf = &qc->result_tf; 953 unsigned char *sb = cmd->sense_buffer; 954 int verbose = qc->ap->ops->error_handler == NULL; 955 u64 block; 956 u8 sense_key, asc, ascq; 957 958 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 959 960 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 961 962 if (ata_dev_disabled(dev)) { 963 /* Device disabled after error recovery */ 964 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 965 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 966 return; 967 } 968 /* Use ata_to_sense_error() to map status register bits 969 * onto sense key, asc & ascq. 970 */ 971 if (qc->err_mask || 972 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 973 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 974 &sense_key, &asc, &ascq, verbose); 975 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 976 } else { 977 /* Could not decode error */ 978 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 979 tf->command, qc->err_mask); 980 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 981 return; 982 } 983 984 block = ata_tf_read_block(&qc->result_tf, dev); 985 if (block == U64_MAX) 986 return; 987 988 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 989 } 990 991 void ata_scsi_sdev_config(struct scsi_device *sdev) 992 { 993 sdev->use_10_for_rw = 1; 994 sdev->use_10_for_ms = 1; 995 sdev->no_write_same = 1; 996 997 /* Schedule policy is determined by ->qc_defer() callback and 998 * it needs to see every deferred qc. Set dev_blocked to 1 to 999 * prevent SCSI midlayer from automatically deferring 1000 * requests. 1001 */ 1002 sdev->max_device_blocked = 1; 1003 } 1004 1005 /** 1006 * ata_scsi_dma_need_drain - Check whether data transfer may overflow 1007 * @rq: request to be checked 1008 * 1009 * ATAPI commands which transfer variable length data to host 1010 * might overflow due to application error or hardware bug. This 1011 * function checks whether overflow should be drained and ignored 1012 * for @request. 1013 * 1014 * LOCKING: 1015 * None. 1016 * 1017 * RETURNS: 1018 * 1 if ; otherwise, 0. 1019 */ 1020 bool ata_scsi_dma_need_drain(struct request *rq) 1021 { 1022 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; 1023 } 1024 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); 1025 1026 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) 1027 { 1028 struct request_queue *q = sdev->request_queue; 1029 1030 if (!ata_id_has_unload(dev->id)) 1031 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1032 1033 /* configure max sectors */ 1034 blk_queue_max_hw_sectors(q, dev->max_sectors); 1035 1036 if (dev->class == ATA_DEV_ATAPI) { 1037 sdev->sector_size = ATA_SECT_SIZE; 1038 1039 /* set DMA padding */ 1040 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1041 1042 /* make room for appending the drain */ 1043 blk_queue_max_segments(q, queue_max_segments(q) - 1); 1044 1045 sdev->dma_drain_len = ATAPI_MAX_DRAIN; 1046 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); 1047 if (!sdev->dma_drain_buf) { 1048 ata_dev_err(dev, "drain buffer allocation failed\n"); 1049 return -ENOMEM; 1050 } 1051 } else { 1052 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1053 sdev->manage_start_stop = 1; 1054 } 1055 1056 /* 1057 * ata_pio_sectors() expects buffer for each sector to not cross 1058 * page boundary. Enforce it by requiring buffers to be sector 1059 * aligned, which works iff sector_size is not larger than 1060 * PAGE_SIZE. ATAPI devices also need the alignment as 1061 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1062 */ 1063 if (sdev->sector_size > PAGE_SIZE) 1064 ata_dev_warn(dev, 1065 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1066 sdev->sector_size); 1067 1068 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1069 1070 if (dev->flags & ATA_DFLAG_AN) 1071 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1072 1073 if (dev->flags & ATA_DFLAG_NCQ) { 1074 int depth; 1075 1076 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1077 depth = min(ATA_MAX_QUEUE, depth); 1078 scsi_change_queue_depth(sdev, depth); 1079 } 1080 1081 if (dev->flags & ATA_DFLAG_TRUSTED) 1082 sdev->security_supported = 1; 1083 1084 dev->sdev = sdev; 1085 return 0; 1086 } 1087 1088 /** 1089 * ata_scsi_slave_config - Set SCSI device attributes 1090 * @sdev: SCSI device to examine 1091 * 1092 * This is called before we actually start reading 1093 * and writing to the device, to configure certain 1094 * SCSI mid-layer behaviors. 1095 * 1096 * LOCKING: 1097 * Defined by SCSI layer. We don't really care. 1098 */ 1099 1100 int ata_scsi_slave_config(struct scsi_device *sdev) 1101 { 1102 struct ata_port *ap = ata_shost_to_port(sdev->host); 1103 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1104 int rc = 0; 1105 1106 ata_scsi_sdev_config(sdev); 1107 1108 if (dev) 1109 rc = ata_scsi_dev_config(sdev, dev); 1110 1111 return rc; 1112 } 1113 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 1114 1115 /** 1116 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1117 * @sdev: SCSI device to be destroyed 1118 * 1119 * @sdev is about to be destroyed for hot/warm unplugging. If 1120 * this unplugging was initiated by libata as indicated by NULL 1121 * dev->sdev, this function doesn't have to do anything. 1122 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1123 * Clear dev->sdev, schedule the device for ATA detach and invoke 1124 * EH. 1125 * 1126 * LOCKING: 1127 * Defined by SCSI layer. We don't really care. 1128 */ 1129 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1130 { 1131 struct ata_port *ap = ata_shost_to_port(sdev->host); 1132 unsigned long flags; 1133 struct ata_device *dev; 1134 1135 if (!ap->ops->error_handler) 1136 return; 1137 1138 spin_lock_irqsave(ap->lock, flags); 1139 dev = __ata_scsi_find_dev(ap, sdev); 1140 if (dev && dev->sdev) { 1141 /* SCSI device already in CANCEL state, no need to offline it */ 1142 dev->sdev = NULL; 1143 dev->flags |= ATA_DFLAG_DETACH; 1144 ata_port_schedule_eh(ap); 1145 } 1146 spin_unlock_irqrestore(ap->lock, flags); 1147 1148 kfree(sdev->dma_drain_buf); 1149 } 1150 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 1151 1152 /** 1153 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1154 * @qc: Storage for translated ATA taskfile 1155 * 1156 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1157 * (to start). Perhaps these commands should be preceded by 1158 * CHECK POWER MODE to see what power mode the device is already in. 1159 * [See SAT revision 5 at www.t10.org] 1160 * 1161 * LOCKING: 1162 * spin_lock_irqsave(host lock) 1163 * 1164 * RETURNS: 1165 * Zero on success, non-zero on error. 1166 */ 1167 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1168 { 1169 struct scsi_cmnd *scmd = qc->scsicmd; 1170 struct ata_taskfile *tf = &qc->tf; 1171 const u8 *cdb = scmd->cmnd; 1172 u16 fp; 1173 u8 bp = 0xff; 1174 1175 if (scmd->cmd_len < 5) { 1176 fp = 4; 1177 goto invalid_fld; 1178 } 1179 1180 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1181 tf->protocol = ATA_PROT_NODATA; 1182 if (cdb[1] & 0x1) { 1183 ; /* ignore IMMED bit, violates sat-r05 */ 1184 } 1185 if (cdb[4] & 0x2) { 1186 fp = 4; 1187 bp = 1; 1188 goto invalid_fld; /* LOEJ bit set not supported */ 1189 } 1190 if (((cdb[4] >> 4) & 0xf) != 0) { 1191 fp = 4; 1192 bp = 3; 1193 goto invalid_fld; /* power conditions not supported */ 1194 } 1195 1196 if (cdb[4] & 0x1) { 1197 tf->nsect = 1; /* 1 sector, lba=0 */ 1198 1199 if (qc->dev->flags & ATA_DFLAG_LBA) { 1200 tf->flags |= ATA_TFLAG_LBA; 1201 1202 tf->lbah = 0x0; 1203 tf->lbam = 0x0; 1204 tf->lbal = 0x0; 1205 tf->device |= ATA_LBA; 1206 } else { 1207 /* CHS */ 1208 tf->lbal = 0x1; /* sect */ 1209 tf->lbam = 0x0; /* cyl low */ 1210 tf->lbah = 0x0; /* cyl high */ 1211 } 1212 1213 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1214 } else { 1215 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1216 * or S5) causing some drives to spin up and down again. 1217 */ 1218 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1219 system_state == SYSTEM_POWER_OFF) 1220 goto skip; 1221 1222 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1223 system_entering_hibernation()) 1224 goto skip; 1225 1226 /* Issue ATA STANDBY IMMEDIATE command */ 1227 tf->command = ATA_CMD_STANDBYNOW1; 1228 } 1229 1230 /* 1231 * Standby and Idle condition timers could be implemented but that 1232 * would require libata to implement the Power condition mode page 1233 * and allow the user to change it. Changing mode pages requires 1234 * MODE SELECT to be implemented. 1235 */ 1236 1237 return 0; 1238 1239 invalid_fld: 1240 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1241 return 1; 1242 skip: 1243 scmd->result = SAM_STAT_GOOD; 1244 return 1; 1245 } 1246 1247 1248 /** 1249 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1250 * @qc: Storage for translated ATA taskfile 1251 * 1252 * Sets up an ATA taskfile to issue FLUSH CACHE or 1253 * FLUSH CACHE EXT. 1254 * 1255 * LOCKING: 1256 * spin_lock_irqsave(host lock) 1257 * 1258 * RETURNS: 1259 * Zero on success, non-zero on error. 1260 */ 1261 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1262 { 1263 struct ata_taskfile *tf = &qc->tf; 1264 1265 tf->flags |= ATA_TFLAG_DEVICE; 1266 tf->protocol = ATA_PROT_NODATA; 1267 1268 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1269 tf->command = ATA_CMD_FLUSH_EXT; 1270 else 1271 tf->command = ATA_CMD_FLUSH; 1272 1273 /* flush is critical for IO integrity, consider it an IO command */ 1274 qc->flags |= ATA_QCFLAG_IO; 1275 1276 return 0; 1277 } 1278 1279 /** 1280 * scsi_6_lba_len - Get LBA and transfer length 1281 * @cdb: SCSI command to translate 1282 * 1283 * Calculate LBA and transfer length for 6-byte commands. 1284 * 1285 * RETURNS: 1286 * @plba: the LBA 1287 * @plen: the transfer length 1288 */ 1289 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1290 { 1291 u64 lba = 0; 1292 u32 len; 1293 1294 VPRINTK("six-byte command\n"); 1295 1296 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1297 lba |= ((u64)cdb[2]) << 8; 1298 lba |= ((u64)cdb[3]); 1299 1300 len = cdb[4]; 1301 1302 *plba = lba; 1303 *plen = len; 1304 } 1305 1306 /** 1307 * scsi_10_lba_len - Get LBA and transfer length 1308 * @cdb: SCSI command to translate 1309 * 1310 * Calculate LBA and transfer length for 10-byte commands. 1311 * 1312 * RETURNS: 1313 * @plba: the LBA 1314 * @plen: the transfer length 1315 */ 1316 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1317 { 1318 u64 lba = 0; 1319 u32 len = 0; 1320 1321 VPRINTK("ten-byte command\n"); 1322 1323 lba |= ((u64)cdb[2]) << 24; 1324 lba |= ((u64)cdb[3]) << 16; 1325 lba |= ((u64)cdb[4]) << 8; 1326 lba |= ((u64)cdb[5]); 1327 1328 len |= ((u32)cdb[7]) << 8; 1329 len |= ((u32)cdb[8]); 1330 1331 *plba = lba; 1332 *plen = len; 1333 } 1334 1335 /** 1336 * scsi_16_lba_len - Get LBA and transfer length 1337 * @cdb: SCSI command to translate 1338 * 1339 * Calculate LBA and transfer length for 16-byte commands. 1340 * 1341 * RETURNS: 1342 * @plba: the LBA 1343 * @plen: the transfer length 1344 */ 1345 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1346 { 1347 u64 lba = 0; 1348 u32 len = 0; 1349 1350 VPRINTK("sixteen-byte command\n"); 1351 1352 lba |= ((u64)cdb[2]) << 56; 1353 lba |= ((u64)cdb[3]) << 48; 1354 lba |= ((u64)cdb[4]) << 40; 1355 lba |= ((u64)cdb[5]) << 32; 1356 lba |= ((u64)cdb[6]) << 24; 1357 lba |= ((u64)cdb[7]) << 16; 1358 lba |= ((u64)cdb[8]) << 8; 1359 lba |= ((u64)cdb[9]); 1360 1361 len |= ((u32)cdb[10]) << 24; 1362 len |= ((u32)cdb[11]) << 16; 1363 len |= ((u32)cdb[12]) << 8; 1364 len |= ((u32)cdb[13]); 1365 1366 *plba = lba; 1367 *plen = len; 1368 } 1369 1370 /** 1371 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1372 * @qc: Storage for translated ATA taskfile 1373 * 1374 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1375 * 1376 * LOCKING: 1377 * spin_lock_irqsave(host lock) 1378 * 1379 * RETURNS: 1380 * Zero on success, non-zero on error. 1381 */ 1382 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1383 { 1384 struct scsi_cmnd *scmd = qc->scsicmd; 1385 struct ata_taskfile *tf = &qc->tf; 1386 struct ata_device *dev = qc->dev; 1387 u64 dev_sectors = qc->dev->n_sectors; 1388 const u8 *cdb = scmd->cmnd; 1389 u64 block; 1390 u32 n_block; 1391 u16 fp; 1392 1393 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1394 tf->protocol = ATA_PROT_NODATA; 1395 1396 if (cdb[0] == VERIFY) { 1397 if (scmd->cmd_len < 10) { 1398 fp = 9; 1399 goto invalid_fld; 1400 } 1401 scsi_10_lba_len(cdb, &block, &n_block); 1402 } else if (cdb[0] == VERIFY_16) { 1403 if (scmd->cmd_len < 16) { 1404 fp = 15; 1405 goto invalid_fld; 1406 } 1407 scsi_16_lba_len(cdb, &block, &n_block); 1408 } else { 1409 fp = 0; 1410 goto invalid_fld; 1411 } 1412 1413 if (!n_block) 1414 goto nothing_to_do; 1415 if (block >= dev_sectors) 1416 goto out_of_range; 1417 if ((block + n_block) > dev_sectors) 1418 goto out_of_range; 1419 1420 if (dev->flags & ATA_DFLAG_LBA) { 1421 tf->flags |= ATA_TFLAG_LBA; 1422 1423 if (lba_28_ok(block, n_block)) { 1424 /* use LBA28 */ 1425 tf->command = ATA_CMD_VERIFY; 1426 tf->device |= (block >> 24) & 0xf; 1427 } else if (lba_48_ok(block, n_block)) { 1428 if (!(dev->flags & ATA_DFLAG_LBA48)) 1429 goto out_of_range; 1430 1431 /* use LBA48 */ 1432 tf->flags |= ATA_TFLAG_LBA48; 1433 tf->command = ATA_CMD_VERIFY_EXT; 1434 1435 tf->hob_nsect = (n_block >> 8) & 0xff; 1436 1437 tf->hob_lbah = (block >> 40) & 0xff; 1438 tf->hob_lbam = (block >> 32) & 0xff; 1439 tf->hob_lbal = (block >> 24) & 0xff; 1440 } else 1441 /* request too large even for LBA48 */ 1442 goto out_of_range; 1443 1444 tf->nsect = n_block & 0xff; 1445 1446 tf->lbah = (block >> 16) & 0xff; 1447 tf->lbam = (block >> 8) & 0xff; 1448 tf->lbal = block & 0xff; 1449 1450 tf->device |= ATA_LBA; 1451 } else { 1452 /* CHS */ 1453 u32 sect, head, cyl, track; 1454 1455 if (!lba_28_ok(block, n_block)) 1456 goto out_of_range; 1457 1458 /* Convert LBA to CHS */ 1459 track = (u32)block / dev->sectors; 1460 cyl = track / dev->heads; 1461 head = track % dev->heads; 1462 sect = (u32)block % dev->sectors + 1; 1463 1464 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1465 (u32)block, track, cyl, head, sect); 1466 1467 /* Check whether the converted CHS can fit. 1468 Cylinder: 0-65535 1469 Head: 0-15 1470 Sector: 1-255*/ 1471 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1472 goto out_of_range; 1473 1474 tf->command = ATA_CMD_VERIFY; 1475 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1476 tf->lbal = sect; 1477 tf->lbam = cyl; 1478 tf->lbah = cyl >> 8; 1479 tf->device |= head; 1480 } 1481 1482 return 0; 1483 1484 invalid_fld: 1485 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1486 return 1; 1487 1488 out_of_range: 1489 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1490 /* "Logical Block Address out of range" */ 1491 return 1; 1492 1493 nothing_to_do: 1494 scmd->result = SAM_STAT_GOOD; 1495 return 1; 1496 } 1497 1498 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1499 { 1500 struct request *rq = scmd->request; 1501 u32 req_blocks; 1502 1503 if (!blk_rq_is_passthrough(rq)) 1504 return true; 1505 1506 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1507 if (n_blocks > req_blocks) 1508 return false; 1509 1510 return true; 1511 } 1512 1513 /** 1514 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1515 * @qc: Storage for translated ATA taskfile 1516 * 1517 * Converts any of six SCSI read/write commands into the 1518 * ATA counterpart, including starting sector (LBA), 1519 * sector count, and taking into account the device's LBA48 1520 * support. 1521 * 1522 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1523 * %WRITE_16 are currently supported. 1524 * 1525 * LOCKING: 1526 * spin_lock_irqsave(host lock) 1527 * 1528 * RETURNS: 1529 * Zero on success, non-zero on error. 1530 */ 1531 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1532 { 1533 struct scsi_cmnd *scmd = qc->scsicmd; 1534 const u8 *cdb = scmd->cmnd; 1535 struct request *rq = scmd->request; 1536 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1537 unsigned int tf_flags = 0; 1538 u64 block; 1539 u32 n_block; 1540 int rc; 1541 u16 fp = 0; 1542 1543 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1544 tf_flags |= ATA_TFLAG_WRITE; 1545 1546 /* Calculate the SCSI LBA, transfer length and FUA. */ 1547 switch (cdb[0]) { 1548 case READ_10: 1549 case WRITE_10: 1550 if (unlikely(scmd->cmd_len < 10)) { 1551 fp = 9; 1552 goto invalid_fld; 1553 } 1554 scsi_10_lba_len(cdb, &block, &n_block); 1555 if (cdb[1] & (1 << 3)) 1556 tf_flags |= ATA_TFLAG_FUA; 1557 if (!ata_check_nblocks(scmd, n_block)) 1558 goto invalid_fld; 1559 break; 1560 case READ_6: 1561 case WRITE_6: 1562 if (unlikely(scmd->cmd_len < 6)) { 1563 fp = 5; 1564 goto invalid_fld; 1565 } 1566 scsi_6_lba_len(cdb, &block, &n_block); 1567 1568 /* for 6-byte r/w commands, transfer length 0 1569 * means 256 blocks of data, not 0 block. 1570 */ 1571 if (!n_block) 1572 n_block = 256; 1573 if (!ata_check_nblocks(scmd, n_block)) 1574 goto invalid_fld; 1575 break; 1576 case READ_16: 1577 case WRITE_16: 1578 if (unlikely(scmd->cmd_len < 16)) { 1579 fp = 15; 1580 goto invalid_fld; 1581 } 1582 scsi_16_lba_len(cdb, &block, &n_block); 1583 if (cdb[1] & (1 << 3)) 1584 tf_flags |= ATA_TFLAG_FUA; 1585 if (!ata_check_nblocks(scmd, n_block)) 1586 goto invalid_fld; 1587 break; 1588 default: 1589 DPRINTK("no-byte command\n"); 1590 fp = 0; 1591 goto invalid_fld; 1592 } 1593 1594 /* Check and compose ATA command */ 1595 if (!n_block) 1596 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1597 * length 0 means transfer 0 block of data. 1598 * However, for ATA R/W commands, sector count 0 means 1599 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1600 * 1601 * WARNING: one or two older ATA drives treat 0 as 0... 1602 */ 1603 goto nothing_to_do; 1604 1605 qc->flags |= ATA_QCFLAG_IO; 1606 qc->nbytes = n_block * scmd->device->sector_size; 1607 1608 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1609 qc->hw_tag, class); 1610 1611 if (likely(rc == 0)) 1612 return 0; 1613 1614 if (rc == -ERANGE) 1615 goto out_of_range; 1616 /* treat all other errors as -EINVAL, fall through */ 1617 invalid_fld: 1618 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1619 return 1; 1620 1621 out_of_range: 1622 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1623 /* "Logical Block Address out of range" */ 1624 return 1; 1625 1626 nothing_to_do: 1627 scmd->result = SAM_STAT_GOOD; 1628 return 1; 1629 } 1630 1631 static void ata_qc_done(struct ata_queued_cmd *qc) 1632 { 1633 struct scsi_cmnd *cmd = qc->scsicmd; 1634 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1635 1636 ata_qc_free(qc); 1637 done(cmd); 1638 } 1639 1640 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1641 { 1642 struct ata_port *ap = qc->ap; 1643 struct scsi_cmnd *cmd = qc->scsicmd; 1644 u8 *cdb = cmd->cmnd; 1645 int need_sense = (qc->err_mask != 0); 1646 1647 /* For ATA pass thru (SAT) commands, generate a sense block if 1648 * user mandated it or if there's an error. Note that if we 1649 * generate because the user forced us to [CK_COND =1], a check 1650 * condition is generated and the ATA register values are returned 1651 * whether the command completed successfully or not. If there 1652 * was no error, we use the following sense data: 1653 * sk = RECOVERED ERROR 1654 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1655 */ 1656 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1657 ((cdb[2] & 0x20) || need_sense)) 1658 ata_gen_passthru_sense(qc); 1659 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1660 cmd->result = SAM_STAT_CHECK_CONDITION; 1661 else if (need_sense) 1662 ata_gen_ata_sense(qc); 1663 else 1664 cmd->result = SAM_STAT_GOOD; 1665 1666 if (need_sense && !ap->ops->error_handler) 1667 ata_dump_status(ap->print_id, &qc->result_tf); 1668 1669 ata_qc_done(qc); 1670 } 1671 1672 /** 1673 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1674 * @dev: ATA device to which the command is addressed 1675 * @cmd: SCSI command to execute 1676 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1677 * 1678 * Our ->queuecommand() function has decided that the SCSI 1679 * command issued can be directly translated into an ATA 1680 * command, rather than handled internally. 1681 * 1682 * This function sets up an ata_queued_cmd structure for the 1683 * SCSI command, and sends that ata_queued_cmd to the hardware. 1684 * 1685 * The xlat_func argument (actor) returns 0 if ready to execute 1686 * ATA command, else 1 to finish translation. If 1 is returned 1687 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1688 * to be set reflecting an error condition or clean (early) 1689 * termination. 1690 * 1691 * LOCKING: 1692 * spin_lock_irqsave(host lock) 1693 * 1694 * RETURNS: 1695 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1696 * needs to be deferred. 1697 */ 1698 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1699 ata_xlat_func_t xlat_func) 1700 { 1701 struct ata_port *ap = dev->link->ap; 1702 struct ata_queued_cmd *qc; 1703 int rc; 1704 1705 VPRINTK("ENTER\n"); 1706 1707 qc = ata_scsi_qc_new(dev, cmd); 1708 if (!qc) 1709 goto err_mem; 1710 1711 /* data is present; dma-map it */ 1712 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1713 cmd->sc_data_direction == DMA_TO_DEVICE) { 1714 if (unlikely(scsi_bufflen(cmd) < 1)) { 1715 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1716 goto err_did; 1717 } 1718 1719 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1720 1721 qc->dma_dir = cmd->sc_data_direction; 1722 } 1723 1724 qc->complete_fn = ata_scsi_qc_complete; 1725 1726 if (xlat_func(qc)) 1727 goto early_finish; 1728 1729 if (ap->ops->qc_defer) { 1730 if ((rc = ap->ops->qc_defer(qc))) 1731 goto defer; 1732 } 1733 1734 /* select device, send command to hardware */ 1735 ata_qc_issue(qc); 1736 1737 VPRINTK("EXIT\n"); 1738 return 0; 1739 1740 early_finish: 1741 ata_qc_free(qc); 1742 cmd->scsi_done(cmd); 1743 DPRINTK("EXIT - early finish (good or error)\n"); 1744 return 0; 1745 1746 err_did: 1747 ata_qc_free(qc); 1748 cmd->result = (DID_ERROR << 16); 1749 cmd->scsi_done(cmd); 1750 err_mem: 1751 DPRINTK("EXIT - internal\n"); 1752 return 0; 1753 1754 defer: 1755 ata_qc_free(qc); 1756 DPRINTK("EXIT - defer\n"); 1757 if (rc == ATA_DEFER_LINK) 1758 return SCSI_MLQUEUE_DEVICE_BUSY; 1759 else 1760 return SCSI_MLQUEUE_HOST_BUSY; 1761 } 1762 1763 struct ata_scsi_args { 1764 struct ata_device *dev; 1765 u16 *id; 1766 struct scsi_cmnd *cmd; 1767 }; 1768 1769 /** 1770 * ata_scsi_rbuf_get - Map response buffer. 1771 * @cmd: SCSI command containing buffer to be mapped. 1772 * @flags: unsigned long variable to store irq enable status 1773 * @copy_in: copy in from user buffer 1774 * 1775 * Prepare buffer for simulated SCSI commands. 1776 * 1777 * LOCKING: 1778 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 1779 * 1780 * RETURNS: 1781 * Pointer to response buffer. 1782 */ 1783 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 1784 unsigned long *flags) 1785 { 1786 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 1787 1788 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1789 if (copy_in) 1790 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1791 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1792 return ata_scsi_rbuf; 1793 } 1794 1795 /** 1796 * ata_scsi_rbuf_put - Unmap response buffer. 1797 * @cmd: SCSI command containing buffer to be unmapped. 1798 * @copy_out: copy out result 1799 * @flags: @flags passed to ata_scsi_rbuf_get() 1800 * 1801 * Returns rbuf buffer. The result is copied to @cmd's buffer if 1802 * @copy_back is true. 1803 * 1804 * LOCKING: 1805 * Unlocks ata_scsi_rbuf_lock. 1806 */ 1807 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 1808 unsigned long *flags) 1809 { 1810 if (copy_out) 1811 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1812 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1813 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 1814 } 1815 1816 /** 1817 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1818 * @args: device IDENTIFY data / SCSI command of interest. 1819 * @actor: Callback hook for desired SCSI command simulator 1820 * 1821 * Takes care of the hard work of simulating a SCSI command... 1822 * Mapping the response buffer, calling the command's handler, 1823 * and handling the handler's return value. This return value 1824 * indicates whether the handler wishes the SCSI command to be 1825 * completed successfully (0), or not (in which case cmd->result 1826 * and sense buffer are assumed to be set). 1827 * 1828 * LOCKING: 1829 * spin_lock_irqsave(host lock) 1830 */ 1831 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1832 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1833 { 1834 u8 *rbuf; 1835 unsigned int rc; 1836 struct scsi_cmnd *cmd = args->cmd; 1837 unsigned long flags; 1838 1839 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 1840 rc = actor(args, rbuf); 1841 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 1842 1843 if (rc == 0) 1844 cmd->result = SAM_STAT_GOOD; 1845 } 1846 1847 /** 1848 * ata_scsiop_inq_std - Simulate INQUIRY command 1849 * @args: device IDENTIFY data / SCSI command of interest. 1850 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1851 * 1852 * Returns standard device identification data associated 1853 * with non-VPD INQUIRY command output. 1854 * 1855 * LOCKING: 1856 * spin_lock_irqsave(host lock) 1857 */ 1858 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1859 { 1860 static const u8 versions[] = { 1861 0x00, 1862 0x60, /* SAM-3 (no version claimed) */ 1863 1864 0x03, 1865 0x20, /* SBC-2 (no version claimed) */ 1866 1867 0x03, 1868 0x00 /* SPC-3 (no version claimed) */ 1869 }; 1870 static const u8 versions_zbc[] = { 1871 0x00, 1872 0xA0, /* SAM-5 (no version claimed) */ 1873 1874 0x06, 1875 0x00, /* SBC-4 (no version claimed) */ 1876 1877 0x05, 1878 0xC0, /* SPC-5 (no version claimed) */ 1879 1880 0x60, 1881 0x24, /* ZBC r05 */ 1882 }; 1883 1884 u8 hdr[] = { 1885 TYPE_DISK, 1886 0, 1887 0x5, /* claim SPC-3 version compatibility */ 1888 2, 1889 95 - 4, 1890 0, 1891 0, 1892 2 1893 }; 1894 1895 VPRINTK("ENTER\n"); 1896 1897 /* set scsi removable (RMB) bit per ata bit, or if the 1898 * AHCI port says it's external (Hotplug-capable, eSATA). 1899 */ 1900 if (ata_id_removable(args->id) || 1901 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 1902 hdr[1] |= (1 << 7); 1903 1904 if (args->dev->class == ATA_DEV_ZAC) { 1905 hdr[0] = TYPE_ZBC; 1906 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 1907 } 1908 1909 memcpy(rbuf, hdr, sizeof(hdr)); 1910 memcpy(&rbuf[8], "ATA ", 8); 1911 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1912 1913 /* From SAT, use last 2 words from fw rev unless they are spaces */ 1914 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 1915 if (strncmp(&rbuf[32], " ", 4) == 0) 1916 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1917 1918 if (rbuf[32] == 0 || rbuf[32] == ' ') 1919 memcpy(&rbuf[32], "n/a ", 4); 1920 1921 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 1922 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 1923 else 1924 memcpy(rbuf + 58, versions, sizeof(versions)); 1925 1926 return 0; 1927 } 1928 1929 /** 1930 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1931 * @args: device IDENTIFY data / SCSI command of interest. 1932 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1933 * 1934 * Returns list of inquiry VPD pages available. 1935 * 1936 * LOCKING: 1937 * spin_lock_irqsave(host lock) 1938 */ 1939 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1940 { 1941 int num_pages; 1942 static const u8 pages[] = { 1943 0x00, /* page 0x00, this page */ 1944 0x80, /* page 0x80, unit serial no page */ 1945 0x83, /* page 0x83, device ident page */ 1946 0x89, /* page 0x89, ata info page */ 1947 0xb0, /* page 0xb0, block limits page */ 1948 0xb1, /* page 0xb1, block device characteristics page */ 1949 0xb2, /* page 0xb2, thin provisioning page */ 1950 0xb6, /* page 0xb6, zoned block device characteristics */ 1951 }; 1952 1953 num_pages = sizeof(pages); 1954 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 1955 num_pages--; 1956 rbuf[3] = num_pages; /* number of supported VPD pages */ 1957 memcpy(rbuf + 4, pages, num_pages); 1958 return 0; 1959 } 1960 1961 /** 1962 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1963 * @args: device IDENTIFY data / SCSI command of interest. 1964 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1965 * 1966 * Returns ATA device serial number. 1967 * 1968 * LOCKING: 1969 * spin_lock_irqsave(host lock) 1970 */ 1971 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1972 { 1973 static const u8 hdr[] = { 1974 0, 1975 0x80, /* this page code */ 1976 0, 1977 ATA_ID_SERNO_LEN, /* page len */ 1978 }; 1979 1980 memcpy(rbuf, hdr, sizeof(hdr)); 1981 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1982 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 1983 return 0; 1984 } 1985 1986 /** 1987 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1988 * @args: device IDENTIFY data / SCSI command of interest. 1989 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1990 * 1991 * Yields two logical unit device identification designators: 1992 * - vendor specific ASCII containing the ATA serial number 1993 * - SAT defined "t10 vendor id based" containing ASCII vendor 1994 * name ("ATA "), model and serial numbers. 1995 * 1996 * LOCKING: 1997 * spin_lock_irqsave(host lock) 1998 */ 1999 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2000 { 2001 const int sat_model_serial_desc_len = 68; 2002 int num; 2003 2004 rbuf[1] = 0x83; /* this page code */ 2005 num = 4; 2006 2007 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2008 rbuf[num + 0] = 2; 2009 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2010 num += 4; 2011 ata_id_string(args->id, (unsigned char *) rbuf + num, 2012 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2013 num += ATA_ID_SERNO_LEN; 2014 2015 /* SAT defined lu model and serial numbers descriptor */ 2016 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2017 rbuf[num + 0] = 2; 2018 rbuf[num + 1] = 1; 2019 rbuf[num + 3] = sat_model_serial_desc_len; 2020 num += 4; 2021 memcpy(rbuf + num, "ATA ", 8); 2022 num += 8; 2023 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2024 ATA_ID_PROD_LEN); 2025 num += ATA_ID_PROD_LEN; 2026 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2027 ATA_ID_SERNO_LEN); 2028 num += ATA_ID_SERNO_LEN; 2029 2030 if (ata_id_has_wwn(args->id)) { 2031 /* SAT defined lu world wide name */ 2032 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2033 rbuf[num + 0] = 1; 2034 rbuf[num + 1] = 3; 2035 rbuf[num + 3] = ATA_ID_WWN_LEN; 2036 num += 4; 2037 ata_id_string(args->id, (unsigned char *) rbuf + num, 2038 ATA_ID_WWN, ATA_ID_WWN_LEN); 2039 num += ATA_ID_WWN_LEN; 2040 } 2041 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2042 return 0; 2043 } 2044 2045 /** 2046 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2047 * @args: device IDENTIFY data / SCSI command of interest. 2048 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2049 * 2050 * Yields SAT-specified ATA VPD page. 2051 * 2052 * LOCKING: 2053 * spin_lock_irqsave(host lock) 2054 */ 2055 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2056 { 2057 rbuf[1] = 0x89; /* our page code */ 2058 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2059 rbuf[3] = (0x238 & 0xff); 2060 2061 memcpy(&rbuf[8], "linux ", 8); 2062 memcpy(&rbuf[16], "libata ", 16); 2063 memcpy(&rbuf[32], DRV_VERSION, 4); 2064 2065 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2066 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ 2067 /* TODO: PMP? */ 2068 2069 /* we don't store the ATA device signature, so we fake it */ 2070 rbuf[38] = ATA_DRDY; /* really, this is Status reg */ 2071 rbuf[40] = 0x1; 2072 rbuf[48] = 0x1; 2073 2074 rbuf[56] = ATA_CMD_ID_ATA; 2075 2076 memcpy(&rbuf[60], &args->id[0], 512); 2077 return 0; 2078 } 2079 2080 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2081 { 2082 struct ata_device *dev = args->dev; 2083 u16 min_io_sectors; 2084 2085 rbuf[1] = 0xb0; 2086 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2087 2088 /* 2089 * Optimal transfer length granularity. 2090 * 2091 * This is always one physical block, but for disks with a smaller 2092 * logical than physical sector size we need to figure out what the 2093 * latter is. 2094 */ 2095 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2096 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2097 2098 /* 2099 * Optimal unmap granularity. 2100 * 2101 * The ATA spec doesn't even know about a granularity or alignment 2102 * for the TRIM command. We can leave away most of the unmap related 2103 * VPD page entries, but we have specifify a granularity to signal 2104 * that we support some form of unmap - in thise case via WRITE SAME 2105 * with the unmap bit set. 2106 */ 2107 if (ata_id_has_trim(args->id)) { 2108 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; 2109 2110 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M) 2111 max_blocks = 128 << (20 - SECTOR_SHIFT); 2112 2113 put_unaligned_be64(max_blocks, &rbuf[36]); 2114 put_unaligned_be32(1, &rbuf[28]); 2115 } 2116 2117 return 0; 2118 } 2119 2120 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2121 { 2122 int form_factor = ata_id_form_factor(args->id); 2123 int media_rotation_rate = ata_id_rotation_rate(args->id); 2124 u8 zoned = ata_id_zoned_cap(args->id); 2125 2126 rbuf[1] = 0xb1; 2127 rbuf[3] = 0x3c; 2128 rbuf[4] = media_rotation_rate >> 8; 2129 rbuf[5] = media_rotation_rate; 2130 rbuf[7] = form_factor; 2131 if (zoned) 2132 rbuf[8] = (zoned << 4); 2133 2134 return 0; 2135 } 2136 2137 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2138 { 2139 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2140 rbuf[1] = 0xb2; 2141 rbuf[3] = 0x4; 2142 rbuf[5] = 1 << 6; /* TPWS */ 2143 2144 return 0; 2145 } 2146 2147 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2148 { 2149 /* 2150 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2151 */ 2152 rbuf[1] = 0xb6; 2153 rbuf[3] = 0x3C; 2154 2155 /* 2156 * URSWRZ bit is only meaningful for host-managed ZAC drives 2157 */ 2158 if (args->dev->zac_zoned_cap & 1) 2159 rbuf[4] |= 1; 2160 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2161 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2162 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2163 2164 return 0; 2165 } 2166 2167 /** 2168 * modecpy - Prepare response for MODE SENSE 2169 * @dest: output buffer 2170 * @src: data being copied 2171 * @n: length of mode page 2172 * @changeable: whether changeable parameters are requested 2173 * 2174 * Generate a generic MODE SENSE page for either current or changeable 2175 * parameters. 2176 * 2177 * LOCKING: 2178 * None. 2179 */ 2180 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2181 { 2182 if (changeable) { 2183 memcpy(dest, src, 2); 2184 memset(dest + 2, 0, n - 2); 2185 } else { 2186 memcpy(dest, src, n); 2187 } 2188 } 2189 2190 /** 2191 * ata_msense_caching - Simulate MODE SENSE caching info page 2192 * @id: device IDENTIFY data 2193 * @buf: output buffer 2194 * @changeable: whether changeable parameters are requested 2195 * 2196 * Generate a caching info page, which conditionally indicates 2197 * write caching to the SCSI layer, depending on device 2198 * capabilities. 2199 * 2200 * LOCKING: 2201 * None. 2202 */ 2203 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2204 { 2205 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2206 if (changeable) { 2207 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2208 } else { 2209 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2210 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2211 } 2212 return sizeof(def_cache_mpage); 2213 } 2214 2215 /** 2216 * ata_msense_control - Simulate MODE SENSE control mode page 2217 * @dev: ATA device of interest 2218 * @buf: output buffer 2219 * @changeable: whether changeable parameters are requested 2220 * 2221 * Generate a generic MODE SENSE control mode page. 2222 * 2223 * LOCKING: 2224 * None. 2225 */ 2226 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2227 bool changeable) 2228 { 2229 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2230 if (changeable) { 2231 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2232 } else { 2233 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2234 2235 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2236 } 2237 return sizeof(def_control_mpage); 2238 } 2239 2240 /** 2241 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2242 * @buf: output buffer 2243 * @changeable: whether changeable parameters are requested 2244 * 2245 * Generate a generic MODE SENSE r/w error recovery page. 2246 * 2247 * LOCKING: 2248 * None. 2249 */ 2250 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2251 { 2252 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2253 changeable); 2254 return sizeof(def_rw_recovery_mpage); 2255 } 2256 2257 /* 2258 * We can turn this into a real blacklist if it's needed, for now just 2259 * blacklist any Maxtor BANC1G10 revision firmware 2260 */ 2261 static int ata_dev_supports_fua(u16 *id) 2262 { 2263 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2264 2265 if (!libata_fua) 2266 return 0; 2267 if (!ata_id_has_fua(id)) 2268 return 0; 2269 2270 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2271 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2272 2273 if (strcmp(model, "Maxtor")) 2274 return 1; 2275 if (strcmp(fw, "BANC1G10")) 2276 return 1; 2277 2278 return 0; /* blacklisted */ 2279 } 2280 2281 /** 2282 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2283 * @args: device IDENTIFY data / SCSI command of interest. 2284 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2285 * 2286 * Simulate MODE SENSE commands. Assume this is invoked for direct 2287 * access devices (e.g. disks) only. There should be no block 2288 * descriptor for other device types. 2289 * 2290 * LOCKING: 2291 * spin_lock_irqsave(host lock) 2292 */ 2293 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2294 { 2295 struct ata_device *dev = args->dev; 2296 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2297 static const u8 sat_blk_desc[] = { 2298 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2299 0, 2300 0, 0x2, 0x0 /* block length: 512 bytes */ 2301 }; 2302 u8 pg, spg; 2303 unsigned int ebd, page_control, six_byte; 2304 u8 dpofua, bp = 0xff; 2305 u16 fp; 2306 2307 VPRINTK("ENTER\n"); 2308 2309 six_byte = (scsicmd[0] == MODE_SENSE); 2310 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2311 /* 2312 * LLBA bit in msense(10) ignored (compliant) 2313 */ 2314 2315 page_control = scsicmd[2] >> 6; 2316 switch (page_control) { 2317 case 0: /* current */ 2318 case 1: /* changeable */ 2319 case 2: /* defaults */ 2320 break; /* supported */ 2321 case 3: /* saved */ 2322 goto saving_not_supp; 2323 default: 2324 fp = 2; 2325 bp = 6; 2326 goto invalid_fld; 2327 } 2328 2329 if (six_byte) 2330 p += 4 + (ebd ? 8 : 0); 2331 else 2332 p += 8 + (ebd ? 8 : 0); 2333 2334 pg = scsicmd[2] & 0x3f; 2335 spg = scsicmd[3]; 2336 /* 2337 * No mode subpages supported (yet) but asking for _all_ 2338 * subpages may be valid 2339 */ 2340 if (spg && (spg != ALL_SUB_MPAGES)) { 2341 fp = 3; 2342 goto invalid_fld; 2343 } 2344 2345 switch(pg) { 2346 case RW_RECOVERY_MPAGE: 2347 p += ata_msense_rw_recovery(p, page_control == 1); 2348 break; 2349 2350 case CACHE_MPAGE: 2351 p += ata_msense_caching(args->id, p, page_control == 1); 2352 break; 2353 2354 case CONTROL_MPAGE: 2355 p += ata_msense_control(args->dev, p, page_control == 1); 2356 break; 2357 2358 case ALL_MPAGES: 2359 p += ata_msense_rw_recovery(p, page_control == 1); 2360 p += ata_msense_caching(args->id, p, page_control == 1); 2361 p += ata_msense_control(args->dev, p, page_control == 1); 2362 break; 2363 2364 default: /* invalid page code */ 2365 fp = 2; 2366 goto invalid_fld; 2367 } 2368 2369 dpofua = 0; 2370 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2371 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2372 dpofua = 1 << 4; 2373 2374 if (six_byte) { 2375 rbuf[0] = p - rbuf - 1; 2376 rbuf[2] |= dpofua; 2377 if (ebd) { 2378 rbuf[3] = sizeof(sat_blk_desc); 2379 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2380 } 2381 } else { 2382 unsigned int output_len = p - rbuf - 2; 2383 2384 rbuf[0] = output_len >> 8; 2385 rbuf[1] = output_len; 2386 rbuf[3] |= dpofua; 2387 if (ebd) { 2388 rbuf[7] = sizeof(sat_blk_desc); 2389 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2390 } 2391 } 2392 return 0; 2393 2394 invalid_fld: 2395 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2396 return 1; 2397 2398 saving_not_supp: 2399 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2400 /* "Saving parameters not supported" */ 2401 return 1; 2402 } 2403 2404 /** 2405 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2406 * @args: device IDENTIFY data / SCSI command of interest. 2407 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2408 * 2409 * Simulate READ CAPACITY commands. 2410 * 2411 * LOCKING: 2412 * None. 2413 */ 2414 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2415 { 2416 struct ata_device *dev = args->dev; 2417 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2418 u32 sector_size; /* physical sector size in bytes */ 2419 u8 log2_per_phys; 2420 u16 lowest_aligned; 2421 2422 sector_size = ata_id_logical_sector_size(dev->id); 2423 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2424 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2425 2426 VPRINTK("ENTER\n"); 2427 2428 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2429 if (last_lba >= 0xffffffffULL) 2430 last_lba = 0xffffffff; 2431 2432 /* sector count, 32-bit */ 2433 rbuf[0] = last_lba >> (8 * 3); 2434 rbuf[1] = last_lba >> (8 * 2); 2435 rbuf[2] = last_lba >> (8 * 1); 2436 rbuf[3] = last_lba; 2437 2438 /* sector size */ 2439 rbuf[4] = sector_size >> (8 * 3); 2440 rbuf[5] = sector_size >> (8 * 2); 2441 rbuf[6] = sector_size >> (8 * 1); 2442 rbuf[7] = sector_size; 2443 } else { 2444 /* sector count, 64-bit */ 2445 rbuf[0] = last_lba >> (8 * 7); 2446 rbuf[1] = last_lba >> (8 * 6); 2447 rbuf[2] = last_lba >> (8 * 5); 2448 rbuf[3] = last_lba >> (8 * 4); 2449 rbuf[4] = last_lba >> (8 * 3); 2450 rbuf[5] = last_lba >> (8 * 2); 2451 rbuf[6] = last_lba >> (8 * 1); 2452 rbuf[7] = last_lba; 2453 2454 /* sector size */ 2455 rbuf[ 8] = sector_size >> (8 * 3); 2456 rbuf[ 9] = sector_size >> (8 * 2); 2457 rbuf[10] = sector_size >> (8 * 1); 2458 rbuf[11] = sector_size; 2459 2460 rbuf[12] = 0; 2461 rbuf[13] = log2_per_phys; 2462 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2463 rbuf[15] = lowest_aligned; 2464 2465 if (ata_id_has_trim(args->id) && 2466 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2467 rbuf[14] |= 0x80; /* LBPME */ 2468 2469 if (ata_id_has_zero_after_trim(args->id) && 2470 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2471 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2472 rbuf[14] |= 0x40; /* LBPRZ */ 2473 } 2474 } 2475 if (ata_id_zoned_cap(args->id) || 2476 args->dev->class == ATA_DEV_ZAC) 2477 rbuf[12] = (1 << 4); /* RC_BASIS */ 2478 } 2479 return 0; 2480 } 2481 2482 /** 2483 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2484 * @args: device IDENTIFY data / SCSI command of interest. 2485 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2486 * 2487 * Simulate REPORT LUNS command. 2488 * 2489 * LOCKING: 2490 * spin_lock_irqsave(host lock) 2491 */ 2492 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2493 { 2494 VPRINTK("ENTER\n"); 2495 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2496 2497 return 0; 2498 } 2499 2500 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2501 { 2502 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2503 /* FIXME: not quite right; we don't want the 2504 * translation of taskfile registers into 2505 * a sense descriptors, since that's only 2506 * correct for ATA, not ATAPI 2507 */ 2508 ata_gen_passthru_sense(qc); 2509 } 2510 2511 ata_qc_done(qc); 2512 } 2513 2514 /* is it pointless to prefer PIO for "safety reasons"? */ 2515 static inline int ata_pio_use_silly(struct ata_port *ap) 2516 { 2517 return (ap->flags & ATA_FLAG_PIO_DMA); 2518 } 2519 2520 static void atapi_request_sense(struct ata_queued_cmd *qc) 2521 { 2522 struct ata_port *ap = qc->ap; 2523 struct scsi_cmnd *cmd = qc->scsicmd; 2524 2525 DPRINTK("ATAPI request sense\n"); 2526 2527 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2528 2529 #ifdef CONFIG_ATA_SFF 2530 if (ap->ops->sff_tf_read) 2531 ap->ops->sff_tf_read(ap, &qc->tf); 2532 #endif 2533 2534 /* fill these in, for the case where they are -not- overwritten */ 2535 cmd->sense_buffer[0] = 0x70; 2536 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2537 2538 ata_qc_reinit(qc); 2539 2540 /* setup sg table and init transfer direction */ 2541 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2542 ata_sg_init(qc, &qc->sgent, 1); 2543 qc->dma_dir = DMA_FROM_DEVICE; 2544 2545 memset(&qc->cdb, 0, qc->dev->cdb_len); 2546 qc->cdb[0] = REQUEST_SENSE; 2547 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2548 2549 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2550 qc->tf.command = ATA_CMD_PACKET; 2551 2552 if (ata_pio_use_silly(ap)) { 2553 qc->tf.protocol = ATAPI_PROT_DMA; 2554 qc->tf.feature |= ATAPI_PKT_DMA; 2555 } else { 2556 qc->tf.protocol = ATAPI_PROT_PIO; 2557 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2558 qc->tf.lbah = 0; 2559 } 2560 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2561 2562 qc->complete_fn = atapi_sense_complete; 2563 2564 ata_qc_issue(qc); 2565 2566 DPRINTK("EXIT\n"); 2567 } 2568 2569 /* 2570 * ATAPI devices typically report zero for their SCSI version, and sometimes 2571 * deviate from the spec WRT response data format. If SCSI version is 2572 * reported as zero like normal, then we make the following fixups: 2573 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2574 * modern device. 2575 * 2) Ensure response data format / ATAPI information are always correct. 2576 */ 2577 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2578 { 2579 u8 buf[4]; 2580 2581 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2582 if (buf[2] == 0) { 2583 buf[2] = 0x5; 2584 buf[3] = 0x32; 2585 } 2586 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2587 } 2588 2589 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2590 { 2591 struct scsi_cmnd *cmd = qc->scsicmd; 2592 unsigned int err_mask = qc->err_mask; 2593 2594 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2595 2596 /* handle completion from new EH */ 2597 if (unlikely(qc->ap->ops->error_handler && 2598 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2599 2600 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2601 /* FIXME: not quite right; we don't want the 2602 * translation of taskfile registers into a 2603 * sense descriptors, since that's only 2604 * correct for ATA, not ATAPI 2605 */ 2606 ata_gen_passthru_sense(qc); 2607 } 2608 2609 /* SCSI EH automatically locks door if sdev->locked is 2610 * set. Sometimes door lock request continues to 2611 * fail, for example, when no media is present. This 2612 * creates a loop - SCSI EH issues door lock which 2613 * fails and gets invoked again to acquire sense data 2614 * for the failed command. 2615 * 2616 * If door lock fails, always clear sdev->locked to 2617 * avoid this infinite loop. 2618 * 2619 * This may happen before SCSI scan is complete. Make 2620 * sure qc->dev->sdev isn't NULL before dereferencing. 2621 */ 2622 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2623 qc->dev->sdev->locked = 0; 2624 2625 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2626 ata_qc_done(qc); 2627 return; 2628 } 2629 2630 /* successful completion or old EH failure path */ 2631 if (unlikely(err_mask & AC_ERR_DEV)) { 2632 cmd->result = SAM_STAT_CHECK_CONDITION; 2633 atapi_request_sense(qc); 2634 return; 2635 } else if (unlikely(err_mask)) { 2636 /* FIXME: not quite right; we don't want the 2637 * translation of taskfile registers into 2638 * a sense descriptors, since that's only 2639 * correct for ATA, not ATAPI 2640 */ 2641 ata_gen_passthru_sense(qc); 2642 } else { 2643 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2644 atapi_fixup_inquiry(cmd); 2645 cmd->result = SAM_STAT_GOOD; 2646 } 2647 2648 ata_qc_done(qc); 2649 } 2650 /** 2651 * atapi_xlat - Initialize PACKET taskfile 2652 * @qc: command structure to be initialized 2653 * 2654 * LOCKING: 2655 * spin_lock_irqsave(host lock) 2656 * 2657 * RETURNS: 2658 * Zero on success, non-zero on failure. 2659 */ 2660 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2661 { 2662 struct scsi_cmnd *scmd = qc->scsicmd; 2663 struct ata_device *dev = qc->dev; 2664 int nodata = (scmd->sc_data_direction == DMA_NONE); 2665 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2666 unsigned int nbytes; 2667 2668 memset(qc->cdb, 0, dev->cdb_len); 2669 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2670 2671 qc->complete_fn = atapi_qc_complete; 2672 2673 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2674 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2675 qc->tf.flags |= ATA_TFLAG_WRITE; 2676 DPRINTK("direction: write\n"); 2677 } 2678 2679 qc->tf.command = ATA_CMD_PACKET; 2680 ata_qc_set_pc_nbytes(qc); 2681 2682 /* check whether ATAPI DMA is safe */ 2683 if (!nodata && !using_pio && atapi_check_dma(qc)) 2684 using_pio = 1; 2685 2686 /* Some controller variants snoop this value for Packet 2687 * transfers to do state machine and FIFO management. Thus we 2688 * want to set it properly, and for DMA where it is 2689 * effectively meaningless. 2690 */ 2691 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2692 2693 /* Most ATAPI devices which honor transfer chunk size don't 2694 * behave according to the spec when odd chunk size which 2695 * matches the transfer length is specified. If the number of 2696 * bytes to transfer is 2n+1. According to the spec, what 2697 * should happen is to indicate that 2n+1 is going to be 2698 * transferred and transfer 2n+2 bytes where the last byte is 2699 * padding. 2700 * 2701 * In practice, this doesn't happen. ATAPI devices first 2702 * indicate and transfer 2n bytes and then indicate and 2703 * transfer 2 bytes where the last byte is padding. 2704 * 2705 * This inconsistency confuses several controllers which 2706 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2707 * These controllers use actual number of transferred bytes to 2708 * update DMA pointer and transfer of 4n+2 bytes make those 2709 * controller push DMA pointer by 4n+4 bytes because SATA data 2710 * FISes are aligned to 4 bytes. This causes data corruption 2711 * and buffer overrun. 2712 * 2713 * Always setting nbytes to even number solves this problem 2714 * because then ATAPI devices don't have to split data at 2n 2715 * boundaries. 2716 */ 2717 if (nbytes & 0x1) 2718 nbytes++; 2719 2720 qc->tf.lbam = (nbytes & 0xFF); 2721 qc->tf.lbah = (nbytes >> 8); 2722 2723 if (nodata) 2724 qc->tf.protocol = ATAPI_PROT_NODATA; 2725 else if (using_pio) 2726 qc->tf.protocol = ATAPI_PROT_PIO; 2727 else { 2728 /* DMA data xfer */ 2729 qc->tf.protocol = ATAPI_PROT_DMA; 2730 qc->tf.feature |= ATAPI_PKT_DMA; 2731 2732 if ((dev->flags & ATA_DFLAG_DMADIR) && 2733 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2734 /* some SATA bridges need us to indicate data xfer direction */ 2735 qc->tf.feature |= ATAPI_DMADIR; 2736 } 2737 2738 2739 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2740 as ATAPI tape drives don't get this right otherwise */ 2741 return 0; 2742 } 2743 2744 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2745 { 2746 if (!sata_pmp_attached(ap)) { 2747 if (likely(devno >= 0 && 2748 devno < ata_link_max_devices(&ap->link))) 2749 return &ap->link.device[devno]; 2750 } else { 2751 if (likely(devno >= 0 && 2752 devno < ap->nr_pmp_links)) 2753 return &ap->pmp_link[devno].device[0]; 2754 } 2755 2756 return NULL; 2757 } 2758 2759 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2760 const struct scsi_device *scsidev) 2761 { 2762 int devno; 2763 2764 /* skip commands not addressed to targets we simulate */ 2765 if (!sata_pmp_attached(ap)) { 2766 if (unlikely(scsidev->channel || scsidev->lun)) 2767 return NULL; 2768 devno = scsidev->id; 2769 } else { 2770 if (unlikely(scsidev->id || scsidev->lun)) 2771 return NULL; 2772 devno = scsidev->channel; 2773 } 2774 2775 return ata_find_dev(ap, devno); 2776 } 2777 2778 /** 2779 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2780 * @ap: ATA port to which the device is attached 2781 * @scsidev: SCSI device from which we derive the ATA device 2782 * 2783 * Given various information provided in struct scsi_cmnd, 2784 * map that onto an ATA bus, and using that mapping 2785 * determine which ata_device is associated with the 2786 * SCSI command to be sent. 2787 * 2788 * LOCKING: 2789 * spin_lock_irqsave(host lock) 2790 * 2791 * RETURNS: 2792 * Associated ATA device, or %NULL if not found. 2793 */ 2794 struct ata_device * 2795 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2796 { 2797 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2798 2799 if (unlikely(!dev || !ata_dev_enabled(dev))) 2800 return NULL; 2801 2802 return dev; 2803 } 2804 2805 /* 2806 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2807 * @byte1: Byte 1 from pass-thru CDB. 2808 * 2809 * RETURNS: 2810 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2811 */ 2812 static u8 2813 ata_scsi_map_proto(u8 byte1) 2814 { 2815 switch((byte1 & 0x1e) >> 1) { 2816 case 3: /* Non-data */ 2817 return ATA_PROT_NODATA; 2818 2819 case 6: /* DMA */ 2820 case 10: /* UDMA Data-in */ 2821 case 11: /* UDMA Data-Out */ 2822 return ATA_PROT_DMA; 2823 2824 case 4: /* PIO Data-in */ 2825 case 5: /* PIO Data-out */ 2826 return ATA_PROT_PIO; 2827 2828 case 12: /* FPDMA */ 2829 return ATA_PROT_NCQ; 2830 2831 case 0: /* Hard Reset */ 2832 case 1: /* SRST */ 2833 case 8: /* Device Diagnostic */ 2834 case 9: /* Device Reset */ 2835 case 7: /* DMA Queued */ 2836 case 15: /* Return Response Info */ 2837 default: /* Reserved */ 2838 break; 2839 } 2840 2841 return ATA_PROT_UNKNOWN; 2842 } 2843 2844 /** 2845 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2846 * @qc: command structure to be initialized 2847 * 2848 * Handles either 12, 16, or 32-byte versions of the CDB. 2849 * 2850 * RETURNS: 2851 * Zero on success, non-zero on failure. 2852 */ 2853 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2854 { 2855 struct ata_taskfile *tf = &(qc->tf); 2856 struct scsi_cmnd *scmd = qc->scsicmd; 2857 struct ata_device *dev = qc->dev; 2858 const u8 *cdb = scmd->cmnd; 2859 u16 fp; 2860 u16 cdb_offset = 0; 2861 2862 /* 7Fh variable length cmd means a ata pass-thru(32) */ 2863 if (cdb[0] == VARIABLE_LENGTH_CMD) 2864 cdb_offset = 9; 2865 2866 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 2867 if (tf->protocol == ATA_PROT_UNKNOWN) { 2868 fp = 1; 2869 goto invalid_fld; 2870 } 2871 2872 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0) 2873 tf->protocol = ATA_PROT_NCQ_NODATA; 2874 2875 /* enable LBA */ 2876 tf->flags |= ATA_TFLAG_LBA; 2877 2878 /* 2879 * 12 and 16 byte CDBs use different offsets to 2880 * provide the various register values. 2881 */ 2882 if (cdb[0] == ATA_16) { 2883 /* 2884 * 16-byte CDB - may contain extended commands. 2885 * 2886 * If that is the case, copy the upper byte register values. 2887 */ 2888 if (cdb[1] & 0x01) { 2889 tf->hob_feature = cdb[3]; 2890 tf->hob_nsect = cdb[5]; 2891 tf->hob_lbal = cdb[7]; 2892 tf->hob_lbam = cdb[9]; 2893 tf->hob_lbah = cdb[11]; 2894 tf->flags |= ATA_TFLAG_LBA48; 2895 } else 2896 tf->flags &= ~ATA_TFLAG_LBA48; 2897 2898 /* 2899 * Always copy low byte, device and command registers. 2900 */ 2901 tf->feature = cdb[4]; 2902 tf->nsect = cdb[6]; 2903 tf->lbal = cdb[8]; 2904 tf->lbam = cdb[10]; 2905 tf->lbah = cdb[12]; 2906 tf->device = cdb[13]; 2907 tf->command = cdb[14]; 2908 } else if (cdb[0] == ATA_12) { 2909 /* 2910 * 12-byte CDB - incapable of extended commands. 2911 */ 2912 tf->flags &= ~ATA_TFLAG_LBA48; 2913 2914 tf->feature = cdb[3]; 2915 tf->nsect = cdb[4]; 2916 tf->lbal = cdb[5]; 2917 tf->lbam = cdb[6]; 2918 tf->lbah = cdb[7]; 2919 tf->device = cdb[8]; 2920 tf->command = cdb[9]; 2921 } else { 2922 /* 2923 * 32-byte CDB - may contain extended command fields. 2924 * 2925 * If that is the case, copy the upper byte register values. 2926 */ 2927 if (cdb[10] & 0x01) { 2928 tf->hob_feature = cdb[20]; 2929 tf->hob_nsect = cdb[22]; 2930 tf->hob_lbal = cdb[16]; 2931 tf->hob_lbam = cdb[15]; 2932 tf->hob_lbah = cdb[14]; 2933 tf->flags |= ATA_TFLAG_LBA48; 2934 } else 2935 tf->flags &= ~ATA_TFLAG_LBA48; 2936 2937 tf->feature = cdb[21]; 2938 tf->nsect = cdb[23]; 2939 tf->lbal = cdb[19]; 2940 tf->lbam = cdb[18]; 2941 tf->lbah = cdb[17]; 2942 tf->device = cdb[24]; 2943 tf->command = cdb[25]; 2944 tf->auxiliary = get_unaligned_be32(&cdb[28]); 2945 } 2946 2947 /* For NCQ commands copy the tag value */ 2948 if (ata_is_ncq(tf->protocol)) 2949 tf->nsect = qc->hw_tag << 3; 2950 2951 /* enforce correct master/slave bit */ 2952 tf->device = dev->devno ? 2953 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2954 2955 switch (tf->command) { 2956 /* READ/WRITE LONG use a non-standard sect_size */ 2957 case ATA_CMD_READ_LONG: 2958 case ATA_CMD_READ_LONG_ONCE: 2959 case ATA_CMD_WRITE_LONG: 2960 case ATA_CMD_WRITE_LONG_ONCE: 2961 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 2962 fp = 1; 2963 goto invalid_fld; 2964 } 2965 qc->sect_size = scsi_bufflen(scmd); 2966 break; 2967 2968 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2969 case ATA_CMD_CFA_WRITE_NE: 2970 case ATA_CMD_CFA_TRANS_SECT: 2971 case ATA_CMD_CFA_WRITE_MULT_NE: 2972 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2973 case ATA_CMD_READ: 2974 case ATA_CMD_READ_EXT: 2975 case ATA_CMD_READ_QUEUED: 2976 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2977 case ATA_CMD_FPDMA_READ: 2978 case ATA_CMD_READ_MULTI: 2979 case ATA_CMD_READ_MULTI_EXT: 2980 case ATA_CMD_PIO_READ: 2981 case ATA_CMD_PIO_READ_EXT: 2982 case ATA_CMD_READ_STREAM_DMA_EXT: 2983 case ATA_CMD_READ_STREAM_EXT: 2984 case ATA_CMD_VERIFY: 2985 case ATA_CMD_VERIFY_EXT: 2986 case ATA_CMD_WRITE: 2987 case ATA_CMD_WRITE_EXT: 2988 case ATA_CMD_WRITE_FUA_EXT: 2989 case ATA_CMD_WRITE_QUEUED: 2990 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2991 case ATA_CMD_FPDMA_WRITE: 2992 case ATA_CMD_WRITE_MULTI: 2993 case ATA_CMD_WRITE_MULTI_EXT: 2994 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2995 case ATA_CMD_PIO_WRITE: 2996 case ATA_CMD_PIO_WRITE_EXT: 2997 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2998 case ATA_CMD_WRITE_STREAM_EXT: 2999 qc->sect_size = scmd->device->sector_size; 3000 break; 3001 3002 /* Everything else uses 512 byte "sectors" */ 3003 default: 3004 qc->sect_size = ATA_SECT_SIZE; 3005 } 3006 3007 /* 3008 * Set flags so that all registers will be written, pass on 3009 * write indication (used for PIO/DMA setup), result TF is 3010 * copied back and we don't whine too much about its failure. 3011 */ 3012 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3013 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3014 tf->flags |= ATA_TFLAG_WRITE; 3015 3016 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3017 3018 /* 3019 * Set transfer length. 3020 * 3021 * TODO: find out if we need to do more here to 3022 * cover scatter/gather case. 3023 */ 3024 ata_qc_set_pc_nbytes(qc); 3025 3026 /* We may not issue DMA commands if no DMA mode is set */ 3027 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3028 fp = 1; 3029 goto invalid_fld; 3030 } 3031 3032 /* We may not issue NCQ commands to devices not supporting NCQ */ 3033 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3034 fp = 1; 3035 goto invalid_fld; 3036 } 3037 3038 /* sanity check for pio multi commands */ 3039 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3040 fp = 1; 3041 goto invalid_fld; 3042 } 3043 3044 if (is_multi_taskfile(tf)) { 3045 unsigned int multi_count = 1 << (cdb[1] >> 5); 3046 3047 /* compare the passed through multi_count 3048 * with the cached multi_count of libata 3049 */ 3050 if (multi_count != dev->multi_count) 3051 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3052 multi_count); 3053 } 3054 3055 /* 3056 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3057 * SET_FEATURES - XFER MODE must be preceded/succeeded 3058 * by an update to hardware-specific registers for each 3059 * controller (i.e. the reason for ->set_piomode(), 3060 * ->set_dmamode(), and ->post_set_mode() hooks). 3061 */ 3062 if (tf->command == ATA_CMD_SET_FEATURES && 3063 tf->feature == SETFEATURES_XFER) { 3064 fp = (cdb[0] == ATA_16) ? 4 : 3; 3065 goto invalid_fld; 3066 } 3067 3068 /* 3069 * Filter TPM commands by default. These provide an 3070 * essentially uncontrolled encrypted "back door" between 3071 * applications and the disk. Set libata.allow_tpm=1 if you 3072 * have a real reason for wanting to use them. This ensures 3073 * that installed software cannot easily mess stuff up without 3074 * user intent. DVR type users will probably ship with this enabled 3075 * for movie content management. 3076 * 3077 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3078 * for this and should do in future but that it is not sufficient as 3079 * DCS is an optional feature set. Thus we also do the software filter 3080 * so that we comply with the TC consortium stated goal that the user 3081 * can turn off TC features of their system. 3082 */ 3083 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3084 fp = (cdb[0] == ATA_16) ? 14 : 9; 3085 goto invalid_fld; 3086 } 3087 3088 return 0; 3089 3090 invalid_fld: 3091 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3092 return 1; 3093 } 3094 3095 /** 3096 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3097 * @cmd: SCSI command being translated 3098 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3099 * @sector: Starting sector 3100 * @count: Total Range of request in logical sectors 3101 * 3102 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3103 * descriptor. 3104 * 3105 * Upto 64 entries of the format: 3106 * 63:48 Range Length 3107 * 47:0 LBA 3108 * 3109 * Range Length of 0 is ignored. 3110 * LBA's should be sorted order and not overlap. 3111 * 3112 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3113 * 3114 * Return: Number of bytes copied into sglist. 3115 */ 3116 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3117 u64 sector, u32 count) 3118 { 3119 struct scsi_device *sdp = cmd->device; 3120 size_t len = sdp->sector_size; 3121 size_t r; 3122 __le64 *buf; 3123 u32 i = 0; 3124 unsigned long flags; 3125 3126 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3127 3128 if (len > ATA_SCSI_RBUF_SIZE) 3129 len = ATA_SCSI_RBUF_SIZE; 3130 3131 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3132 buf = ((void *)ata_scsi_rbuf); 3133 memset(buf, 0, len); 3134 while (i < trmax) { 3135 u64 entry = sector | 3136 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3137 buf[i++] = __cpu_to_le64(entry); 3138 if (count <= 0xffff) 3139 break; 3140 count -= 0xffff; 3141 sector += 0xffff; 3142 } 3143 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3144 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3145 3146 return r; 3147 } 3148 3149 /** 3150 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3151 * @qc: Command to be translated 3152 * 3153 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3154 * an SCT Write Same command. 3155 * Based on WRITE SAME has the UNMAP flag: 3156 * 3157 * - When set translate to DSM TRIM 3158 * - When clear translate to SCT Write Same 3159 */ 3160 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3161 { 3162 struct ata_taskfile *tf = &qc->tf; 3163 struct scsi_cmnd *scmd = qc->scsicmd; 3164 struct scsi_device *sdp = scmd->device; 3165 size_t len = sdp->sector_size; 3166 struct ata_device *dev = qc->dev; 3167 const u8 *cdb = scmd->cmnd; 3168 u64 block; 3169 u32 n_block; 3170 const u32 trmax = len >> 3; 3171 u32 size; 3172 u16 fp; 3173 u8 bp = 0xff; 3174 u8 unmap = cdb[1] & 0x8; 3175 3176 /* we may not issue DMA commands if no DMA mode is set */ 3177 if (unlikely(!dev->dma_mode)) 3178 goto invalid_opcode; 3179 3180 /* 3181 * We only allow sending this command through the block layer, 3182 * as it modifies the DATA OUT buffer, which would corrupt user 3183 * memory for SG_IO commands. 3184 */ 3185 if (unlikely(blk_rq_is_passthrough(scmd->request))) 3186 goto invalid_opcode; 3187 3188 if (unlikely(scmd->cmd_len < 16)) { 3189 fp = 15; 3190 goto invalid_fld; 3191 } 3192 scsi_16_lba_len(cdb, &block, &n_block); 3193 3194 if (!unmap || 3195 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3196 !ata_id_has_trim(dev->id)) { 3197 fp = 1; 3198 bp = 3; 3199 goto invalid_fld; 3200 } 3201 /* If the request is too large the cmd is invalid */ 3202 if (n_block > 0xffff * trmax) { 3203 fp = 2; 3204 goto invalid_fld; 3205 } 3206 3207 /* 3208 * WRITE SAME always has a sector sized buffer as payload, this 3209 * should never be a multiple entry S/G list. 3210 */ 3211 if (!scsi_sg_count(scmd)) 3212 goto invalid_param_len; 3213 3214 /* 3215 * size must match sector size in bytes 3216 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3217 * is defined as number of 512 byte blocks to be transferred. 3218 */ 3219 3220 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3221 if (size != len) 3222 goto invalid_param_len; 3223 3224 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3225 /* Newer devices support queued TRIM commands */ 3226 tf->protocol = ATA_PROT_NCQ; 3227 tf->command = ATA_CMD_FPDMA_SEND; 3228 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3229 tf->nsect = qc->hw_tag << 3; 3230 tf->hob_feature = (size / 512) >> 8; 3231 tf->feature = size / 512; 3232 3233 tf->auxiliary = 1; 3234 } else { 3235 tf->protocol = ATA_PROT_DMA; 3236 tf->hob_feature = 0; 3237 tf->feature = ATA_DSM_TRIM; 3238 tf->hob_nsect = (size / 512) >> 8; 3239 tf->nsect = size / 512; 3240 tf->command = ATA_CMD_DSM; 3241 } 3242 3243 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3244 ATA_TFLAG_WRITE; 3245 3246 ata_qc_set_pc_nbytes(qc); 3247 3248 return 0; 3249 3250 invalid_fld: 3251 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3252 return 1; 3253 invalid_param_len: 3254 /* "Parameter list length error" */ 3255 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3256 return 1; 3257 invalid_opcode: 3258 /* "Invalid command operation code" */ 3259 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3260 return 1; 3261 } 3262 3263 /** 3264 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3265 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3266 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3267 * 3268 * Yields a subset to satisfy scsi_report_opcode() 3269 * 3270 * LOCKING: 3271 * spin_lock_irqsave(host lock) 3272 */ 3273 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3274 { 3275 struct ata_device *dev = args->dev; 3276 u8 *cdb = args->cmd->cmnd; 3277 u8 supported = 0; 3278 unsigned int err = 0; 3279 3280 if (cdb[2] != 1) { 3281 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3282 err = 2; 3283 goto out; 3284 } 3285 switch (cdb[3]) { 3286 case INQUIRY: 3287 case MODE_SENSE: 3288 case MODE_SENSE_10: 3289 case READ_CAPACITY: 3290 case SERVICE_ACTION_IN_16: 3291 case REPORT_LUNS: 3292 case REQUEST_SENSE: 3293 case SYNCHRONIZE_CACHE: 3294 case REZERO_UNIT: 3295 case SEEK_6: 3296 case SEEK_10: 3297 case TEST_UNIT_READY: 3298 case SEND_DIAGNOSTIC: 3299 case MAINTENANCE_IN: 3300 case READ_6: 3301 case READ_10: 3302 case READ_16: 3303 case WRITE_6: 3304 case WRITE_10: 3305 case WRITE_16: 3306 case ATA_12: 3307 case ATA_16: 3308 case VERIFY: 3309 case VERIFY_16: 3310 case MODE_SELECT: 3311 case MODE_SELECT_10: 3312 case START_STOP: 3313 supported = 3; 3314 break; 3315 case ZBC_IN: 3316 case ZBC_OUT: 3317 if (ata_id_zoned_cap(dev->id) || 3318 dev->class == ATA_DEV_ZAC) 3319 supported = 3; 3320 break; 3321 case SECURITY_PROTOCOL_IN: 3322 case SECURITY_PROTOCOL_OUT: 3323 if (dev->flags & ATA_DFLAG_TRUSTED) 3324 supported = 3; 3325 break; 3326 default: 3327 break; 3328 } 3329 out: 3330 rbuf[1] = supported; /* supported */ 3331 return err; 3332 } 3333 3334 /** 3335 * ata_scsi_report_zones_complete - convert ATA output 3336 * @qc: command structure returning the data 3337 * 3338 * Convert T-13 little-endian field representation into 3339 * T-10 big-endian field representation. 3340 * What a mess. 3341 */ 3342 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3343 { 3344 struct scsi_cmnd *scmd = qc->scsicmd; 3345 struct sg_mapping_iter miter; 3346 unsigned long flags; 3347 unsigned int bytes = 0; 3348 3349 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3350 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3351 3352 local_irq_save(flags); 3353 while (sg_miter_next(&miter)) { 3354 unsigned int offset = 0; 3355 3356 if (bytes == 0) { 3357 char *hdr; 3358 u32 list_length; 3359 u64 max_lba, opt_lba; 3360 u16 same; 3361 3362 /* Swizzle header */ 3363 hdr = miter.addr; 3364 list_length = get_unaligned_le32(&hdr[0]); 3365 same = get_unaligned_le16(&hdr[4]); 3366 max_lba = get_unaligned_le64(&hdr[8]); 3367 opt_lba = get_unaligned_le64(&hdr[16]); 3368 put_unaligned_be32(list_length, &hdr[0]); 3369 hdr[4] = same & 0xf; 3370 put_unaligned_be64(max_lba, &hdr[8]); 3371 put_unaligned_be64(opt_lba, &hdr[16]); 3372 offset += 64; 3373 bytes += 64; 3374 } 3375 while (offset < miter.length) { 3376 char *rec; 3377 u8 cond, type, non_seq, reset; 3378 u64 size, start, wp; 3379 3380 /* Swizzle zone descriptor */ 3381 rec = miter.addr + offset; 3382 type = rec[0] & 0xf; 3383 cond = (rec[1] >> 4) & 0xf; 3384 non_seq = (rec[1] & 2); 3385 reset = (rec[1] & 1); 3386 size = get_unaligned_le64(&rec[8]); 3387 start = get_unaligned_le64(&rec[16]); 3388 wp = get_unaligned_le64(&rec[24]); 3389 rec[0] = type; 3390 rec[1] = (cond << 4) | non_seq | reset; 3391 put_unaligned_be64(size, &rec[8]); 3392 put_unaligned_be64(start, &rec[16]); 3393 put_unaligned_be64(wp, &rec[24]); 3394 WARN_ON(offset + 64 > miter.length); 3395 offset += 64; 3396 bytes += 64; 3397 } 3398 } 3399 sg_miter_stop(&miter); 3400 local_irq_restore(flags); 3401 3402 ata_scsi_qc_complete(qc); 3403 } 3404 3405 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3406 { 3407 struct ata_taskfile *tf = &qc->tf; 3408 struct scsi_cmnd *scmd = qc->scsicmd; 3409 const u8 *cdb = scmd->cmnd; 3410 u16 sect, fp = (u16)-1; 3411 u8 sa, options, bp = 0xff; 3412 u64 block; 3413 u32 n_block; 3414 3415 if (unlikely(scmd->cmd_len < 16)) { 3416 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3417 scmd->cmd_len); 3418 fp = 15; 3419 goto invalid_fld; 3420 } 3421 scsi_16_lba_len(cdb, &block, &n_block); 3422 if (n_block != scsi_bufflen(scmd)) { 3423 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3424 n_block, scsi_bufflen(scmd)); 3425 goto invalid_param_len; 3426 } 3427 sa = cdb[1] & 0x1f; 3428 if (sa != ZI_REPORT_ZONES) { 3429 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3430 fp = 1; 3431 goto invalid_fld; 3432 } 3433 /* 3434 * ZAC allows only for transfers in 512 byte blocks, 3435 * and uses a 16 bit value for the transfer count. 3436 */ 3437 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3438 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3439 goto invalid_param_len; 3440 } 3441 sect = n_block / 512; 3442 options = cdb[14] & 0xbf; 3443 3444 if (ata_ncq_enabled(qc->dev) && 3445 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3446 tf->protocol = ATA_PROT_NCQ; 3447 tf->command = ATA_CMD_FPDMA_RECV; 3448 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3449 tf->nsect = qc->hw_tag << 3; 3450 tf->feature = sect & 0xff; 3451 tf->hob_feature = (sect >> 8) & 0xff; 3452 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3453 } else { 3454 tf->command = ATA_CMD_ZAC_MGMT_IN; 3455 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3456 tf->protocol = ATA_PROT_DMA; 3457 tf->hob_feature = options; 3458 tf->hob_nsect = (sect >> 8) & 0xff; 3459 tf->nsect = sect & 0xff; 3460 } 3461 tf->device = ATA_LBA; 3462 tf->lbah = (block >> 16) & 0xff; 3463 tf->lbam = (block >> 8) & 0xff; 3464 tf->lbal = block & 0xff; 3465 tf->hob_lbah = (block >> 40) & 0xff; 3466 tf->hob_lbam = (block >> 32) & 0xff; 3467 tf->hob_lbal = (block >> 24) & 0xff; 3468 3469 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3470 qc->flags |= ATA_QCFLAG_RESULT_TF; 3471 3472 ata_qc_set_pc_nbytes(qc); 3473 3474 qc->complete_fn = ata_scsi_report_zones_complete; 3475 3476 return 0; 3477 3478 invalid_fld: 3479 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3480 return 1; 3481 3482 invalid_param_len: 3483 /* "Parameter list length error" */ 3484 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3485 return 1; 3486 } 3487 3488 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3489 { 3490 struct ata_taskfile *tf = &qc->tf; 3491 struct scsi_cmnd *scmd = qc->scsicmd; 3492 struct ata_device *dev = qc->dev; 3493 const u8 *cdb = scmd->cmnd; 3494 u8 all, sa; 3495 u64 block; 3496 u32 n_block; 3497 u16 fp = (u16)-1; 3498 3499 if (unlikely(scmd->cmd_len < 16)) { 3500 fp = 15; 3501 goto invalid_fld; 3502 } 3503 3504 sa = cdb[1] & 0x1f; 3505 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3506 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3507 fp = 1; 3508 goto invalid_fld; 3509 } 3510 3511 scsi_16_lba_len(cdb, &block, &n_block); 3512 if (n_block) { 3513 /* 3514 * ZAC MANAGEMENT OUT doesn't define any length 3515 */ 3516 goto invalid_param_len; 3517 } 3518 3519 all = cdb[14] & 0x1; 3520 if (all) { 3521 /* 3522 * Ignore the block address (zone ID) as defined by ZBC. 3523 */ 3524 block = 0; 3525 } else if (block >= dev->n_sectors) { 3526 /* 3527 * Block must be a valid zone ID (a zone start LBA). 3528 */ 3529 fp = 2; 3530 goto invalid_fld; 3531 } 3532 3533 if (ata_ncq_enabled(qc->dev) && 3534 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3535 tf->protocol = ATA_PROT_NCQ_NODATA; 3536 tf->command = ATA_CMD_NCQ_NON_DATA; 3537 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3538 tf->nsect = qc->hw_tag << 3; 3539 tf->auxiliary = sa | ((u16)all << 8); 3540 } else { 3541 tf->protocol = ATA_PROT_NODATA; 3542 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3543 tf->feature = sa; 3544 tf->hob_feature = all; 3545 } 3546 tf->lbah = (block >> 16) & 0xff; 3547 tf->lbam = (block >> 8) & 0xff; 3548 tf->lbal = block & 0xff; 3549 tf->hob_lbah = (block >> 40) & 0xff; 3550 tf->hob_lbam = (block >> 32) & 0xff; 3551 tf->hob_lbal = (block >> 24) & 0xff; 3552 tf->device = ATA_LBA; 3553 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3554 3555 return 0; 3556 3557 invalid_fld: 3558 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3559 return 1; 3560 invalid_param_len: 3561 /* "Parameter list length error" */ 3562 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3563 return 1; 3564 } 3565 3566 /** 3567 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3568 * @qc: Storage for translated ATA taskfile 3569 * @buf: input buffer 3570 * @len: number of valid bytes in the input buffer 3571 * @fp: out parameter for the failed field on error 3572 * 3573 * Prepare a taskfile to modify caching information for the device. 3574 * 3575 * LOCKING: 3576 * None. 3577 */ 3578 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3579 const u8 *buf, int len, u16 *fp) 3580 { 3581 struct ata_taskfile *tf = &qc->tf; 3582 struct ata_device *dev = qc->dev; 3583 u8 mpage[CACHE_MPAGE_LEN]; 3584 u8 wce; 3585 int i; 3586 3587 /* 3588 * The first two bytes of def_cache_mpage are a header, so offsets 3589 * in mpage are off by 2 compared to buf. Same for len. 3590 */ 3591 3592 if (len != CACHE_MPAGE_LEN - 2) { 3593 if (len < CACHE_MPAGE_LEN - 2) 3594 *fp = len; 3595 else 3596 *fp = CACHE_MPAGE_LEN - 2; 3597 return -EINVAL; 3598 } 3599 3600 wce = buf[0] & (1 << 2); 3601 3602 /* 3603 * Check that read-only bits are not modified. 3604 */ 3605 ata_msense_caching(dev->id, mpage, false); 3606 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3607 if (i == 0) 3608 continue; 3609 if (mpage[i + 2] != buf[i]) { 3610 *fp = i; 3611 return -EINVAL; 3612 } 3613 } 3614 3615 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3616 tf->protocol = ATA_PROT_NODATA; 3617 tf->nsect = 0; 3618 tf->command = ATA_CMD_SET_FEATURES; 3619 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3620 return 0; 3621 } 3622 3623 /** 3624 * ata_mselect_control - Simulate MODE SELECT for control page 3625 * @qc: Storage for translated ATA taskfile 3626 * @buf: input buffer 3627 * @len: number of valid bytes in the input buffer 3628 * @fp: out parameter for the failed field on error 3629 * 3630 * Prepare a taskfile to modify caching information for the device. 3631 * 3632 * LOCKING: 3633 * None. 3634 */ 3635 static int ata_mselect_control(struct ata_queued_cmd *qc, 3636 const u8 *buf, int len, u16 *fp) 3637 { 3638 struct ata_device *dev = qc->dev; 3639 u8 mpage[CONTROL_MPAGE_LEN]; 3640 u8 d_sense; 3641 int i; 3642 3643 /* 3644 * The first two bytes of def_control_mpage are a header, so offsets 3645 * in mpage are off by 2 compared to buf. Same for len. 3646 */ 3647 3648 if (len != CONTROL_MPAGE_LEN - 2) { 3649 if (len < CONTROL_MPAGE_LEN - 2) 3650 *fp = len; 3651 else 3652 *fp = CONTROL_MPAGE_LEN - 2; 3653 return -EINVAL; 3654 } 3655 3656 d_sense = buf[0] & (1 << 2); 3657 3658 /* 3659 * Check that read-only bits are not modified. 3660 */ 3661 ata_msense_control(dev, mpage, false); 3662 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3663 if (i == 0) 3664 continue; 3665 if (mpage[2 + i] != buf[i]) { 3666 *fp = i; 3667 return -EINVAL; 3668 } 3669 } 3670 if (d_sense & (1 << 2)) 3671 dev->flags |= ATA_DFLAG_D_SENSE; 3672 else 3673 dev->flags &= ~ATA_DFLAG_D_SENSE; 3674 return 0; 3675 } 3676 3677 /** 3678 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3679 * @qc: Storage for translated ATA taskfile 3680 * 3681 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3682 * Assume this is invoked for direct access devices (e.g. disks) only. 3683 * There should be no block descriptor for other device types. 3684 * 3685 * LOCKING: 3686 * spin_lock_irqsave(host lock) 3687 */ 3688 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3689 { 3690 struct scsi_cmnd *scmd = qc->scsicmd; 3691 const u8 *cdb = scmd->cmnd; 3692 u8 pg, spg; 3693 unsigned six_byte, pg_len, hdr_len, bd_len; 3694 int len; 3695 u16 fp = (u16)-1; 3696 u8 bp = 0xff; 3697 u8 buffer[64]; 3698 const u8 *p = buffer; 3699 3700 VPRINTK("ENTER\n"); 3701 3702 six_byte = (cdb[0] == MODE_SELECT); 3703 if (six_byte) { 3704 if (scmd->cmd_len < 5) { 3705 fp = 4; 3706 goto invalid_fld; 3707 } 3708 3709 len = cdb[4]; 3710 hdr_len = 4; 3711 } else { 3712 if (scmd->cmd_len < 9) { 3713 fp = 8; 3714 goto invalid_fld; 3715 } 3716 3717 len = (cdb[7] << 8) + cdb[8]; 3718 hdr_len = 8; 3719 } 3720 3721 /* We only support PF=1, SP=0. */ 3722 if ((cdb[1] & 0x11) != 0x10) { 3723 fp = 1; 3724 bp = (cdb[1] & 0x01) ? 1 : 5; 3725 goto invalid_fld; 3726 } 3727 3728 /* Test early for possible overrun. */ 3729 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3730 goto invalid_param_len; 3731 3732 /* Move past header and block descriptors. */ 3733 if (len < hdr_len) 3734 goto invalid_param_len; 3735 3736 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), 3737 buffer, sizeof(buffer))) 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 fallthrough; 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