1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * libata-scsi.c - helper library for ATA 4 * 5 * Maintained by: Tejun Heo <tj@kernel.org> 6 * Please ALWAYS copy linux-ide@vger.kernel.org 7 * on emails. 8 * 9 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 10 * Copyright 2003-2004 Jeff Garzik 11 * 12 * libata documentation is available via 'make {ps|pdf}docs', 13 * as Documentation/driver-api/libata.rst 14 * 15 * Hardware documentation available from 16 * - http://www.t10.org/ 17 * - http://www.t13.org/ 18 */ 19 20 #include <linux/slab.h> 21 #include <linux/kernel.h> 22 #include <linux/blkdev.h> 23 #include <linux/spinlock.h> 24 #include <linux/export.h> 25 #include <scsi/scsi.h> 26 #include <scsi/scsi_host.h> 27 #include <scsi/scsi_cmnd.h> 28 #include <scsi/scsi_eh.h> 29 #include <scsi/scsi_device.h> 30 #include <scsi/scsi_tcq.h> 31 #include <scsi/scsi_transport.h> 32 #include <linux/libata.h> 33 #include <linux/hdreg.h> 34 #include <linux/uaccess.h> 35 #include <linux/suspend.h> 36 #include <asm/unaligned.h> 37 #include <linux/ioprio.h> 38 39 #include "libata.h" 40 #include "libata-transport.h" 41 42 #define ATA_SCSI_RBUF_SIZE 4096 43 44 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 45 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 46 47 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 48 49 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 50 const struct scsi_device *scsidev); 51 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, 52 const struct scsi_device *scsidev); 53 54 #define RW_RECOVERY_MPAGE 0x1 55 #define RW_RECOVERY_MPAGE_LEN 12 56 #define CACHE_MPAGE 0x8 57 #define CACHE_MPAGE_LEN 20 58 #define CONTROL_MPAGE 0xa 59 #define CONTROL_MPAGE_LEN 12 60 #define ALL_MPAGES 0x3f 61 #define ALL_SUB_MPAGES 0xff 62 63 64 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 65 RW_RECOVERY_MPAGE, 66 RW_RECOVERY_MPAGE_LEN - 2, 67 (1 << 7), /* AWRE */ 68 0, /* read retry count */ 69 0, 0, 0, 0, 70 0, /* write retry count */ 71 0, 0, 0 72 }; 73 74 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 75 CACHE_MPAGE, 76 CACHE_MPAGE_LEN - 2, 77 0, /* contains WCE, needs to be 0 for logic */ 78 0, 0, 0, 0, 0, 0, 0, 0, 0, 79 0, /* contains DRA, needs to be 0 for logic */ 80 0, 0, 0, 0, 0, 0, 0 81 }; 82 83 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 84 CONTROL_MPAGE, 85 CONTROL_MPAGE_LEN - 2, 86 2, /* DSENSE=0, GLTSD=1 */ 87 0, /* [QAM+QERR may be 1, see 05-359r1] */ 88 0, 0, 0, 0, 0xff, 0xff, 89 0, 30 /* extended self test time, see 05-359r1 */ 90 }; 91 92 static const char *ata_lpm_policy_names[] = { 93 [ATA_LPM_UNKNOWN] = "max_performance", 94 [ATA_LPM_MAX_POWER] = "max_performance", 95 [ATA_LPM_MED_POWER] = "medium_power", 96 [ATA_LPM_MED_POWER_WITH_DIPM] = "med_power_with_dipm", 97 [ATA_LPM_MIN_POWER_WITH_PARTIAL] = "min_power_with_partial", 98 [ATA_LPM_MIN_POWER] = "min_power", 99 }; 100 101 static ssize_t ata_scsi_lpm_store(struct device *device, 102 struct device_attribute *attr, 103 const char *buf, size_t count) 104 { 105 struct Scsi_Host *shost = class_to_shost(device); 106 struct ata_port *ap = ata_shost_to_port(shost); 107 struct ata_link *link; 108 struct ata_device *dev; 109 enum ata_lpm_policy policy; 110 unsigned long flags; 111 112 /* UNKNOWN is internal state, iterate from MAX_POWER */ 113 for (policy = ATA_LPM_MAX_POWER; 114 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) { 115 const char *name = ata_lpm_policy_names[policy]; 116 117 if (strncmp(name, buf, strlen(name)) == 0) 118 break; 119 } 120 if (policy == ARRAY_SIZE(ata_lpm_policy_names)) 121 return -EINVAL; 122 123 spin_lock_irqsave(ap->lock, flags); 124 125 ata_for_each_link(link, ap, EDGE) { 126 ata_for_each_dev(dev, &ap->link, ENABLED) { 127 if (dev->horkage & ATA_HORKAGE_NOLPM) { 128 count = -EOPNOTSUPP; 129 goto out_unlock; 130 } 131 } 132 } 133 134 ap->target_lpm_policy = policy; 135 ata_port_schedule_eh(ap); 136 out_unlock: 137 spin_unlock_irqrestore(ap->lock, flags); 138 return count; 139 } 140 141 static ssize_t ata_scsi_lpm_show(struct device *dev, 142 struct device_attribute *attr, char *buf) 143 { 144 struct Scsi_Host *shost = class_to_shost(dev); 145 struct ata_port *ap = ata_shost_to_port(shost); 146 147 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names)) 148 return -EINVAL; 149 150 return snprintf(buf, PAGE_SIZE, "%s\n", 151 ata_lpm_policy_names[ap->target_lpm_policy]); 152 } 153 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, 154 ata_scsi_lpm_show, ata_scsi_lpm_store); 155 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); 156 157 static ssize_t ata_scsi_park_show(struct device *device, 158 struct device_attribute *attr, char *buf) 159 { 160 struct scsi_device *sdev = to_scsi_device(device); 161 struct ata_port *ap; 162 struct ata_link *link; 163 struct ata_device *dev; 164 unsigned long now; 165 unsigned int uninitialized_var(msecs); 166 int rc = 0; 167 168 ap = ata_shost_to_port(sdev->host); 169 170 spin_lock_irq(ap->lock); 171 dev = ata_scsi_find_dev(ap, sdev); 172 if (!dev) { 173 rc = -ENODEV; 174 goto unlock; 175 } 176 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 177 rc = -EOPNOTSUPP; 178 goto unlock; 179 } 180 181 link = dev->link; 182 now = jiffies; 183 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 184 link->eh_context.unloaded_mask & (1 << dev->devno) && 185 time_after(dev->unpark_deadline, now)) 186 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 187 else 188 msecs = 0; 189 190 unlock: 191 spin_unlock_irq(ap->lock); 192 193 return rc ? rc : snprintf(buf, 20, "%u\n", msecs); 194 } 195 196 static ssize_t ata_scsi_park_store(struct device *device, 197 struct device_attribute *attr, 198 const char *buf, size_t len) 199 { 200 struct scsi_device *sdev = to_scsi_device(device); 201 struct ata_port *ap; 202 struct ata_device *dev; 203 long int input; 204 unsigned long flags; 205 int rc; 206 207 rc = kstrtol(buf, 10, &input); 208 if (rc) 209 return rc; 210 if (input < -2) 211 return -EINVAL; 212 if (input > ATA_TMOUT_MAX_PARK) { 213 rc = -EOVERFLOW; 214 input = ATA_TMOUT_MAX_PARK; 215 } 216 217 ap = ata_shost_to_port(sdev->host); 218 219 spin_lock_irqsave(ap->lock, flags); 220 dev = ata_scsi_find_dev(ap, sdev); 221 if (unlikely(!dev)) { 222 rc = -ENODEV; 223 goto unlock; 224 } 225 if (dev->class != ATA_DEV_ATA && 226 dev->class != ATA_DEV_ZAC) { 227 rc = -EOPNOTSUPP; 228 goto unlock; 229 } 230 231 if (input >= 0) { 232 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 233 rc = -EOPNOTSUPP; 234 goto unlock; 235 } 236 237 dev->unpark_deadline = ata_deadline(jiffies, input); 238 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 239 ata_port_schedule_eh(ap); 240 complete(&ap->park_req_pending); 241 } else { 242 switch (input) { 243 case -1: 244 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 245 break; 246 case -2: 247 dev->flags |= ATA_DFLAG_NO_UNLOAD; 248 break; 249 } 250 } 251 unlock: 252 spin_unlock_irqrestore(ap->lock, flags); 253 254 return rc ? rc : len; 255 } 256 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 257 ata_scsi_park_show, ata_scsi_park_store); 258 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 259 260 static ssize_t ata_ncq_prio_enable_show(struct device *device, 261 struct device_attribute *attr, 262 char *buf) 263 { 264 struct scsi_device *sdev = to_scsi_device(device); 265 struct ata_port *ap; 266 struct ata_device *dev; 267 bool ncq_prio_enable; 268 int rc = 0; 269 270 ap = ata_shost_to_port(sdev->host); 271 272 spin_lock_irq(ap->lock); 273 dev = ata_scsi_find_dev(ap, sdev); 274 if (!dev) { 275 rc = -ENODEV; 276 goto unlock; 277 } 278 279 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE; 280 281 unlock: 282 spin_unlock_irq(ap->lock); 283 284 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable); 285 } 286 287 static ssize_t ata_ncq_prio_enable_store(struct device *device, 288 struct device_attribute *attr, 289 const char *buf, size_t len) 290 { 291 struct scsi_device *sdev = to_scsi_device(device); 292 struct ata_port *ap; 293 struct ata_device *dev; 294 long int input; 295 int rc; 296 297 rc = kstrtol(buf, 10, &input); 298 if (rc) 299 return rc; 300 if ((input < 0) || (input > 1)) 301 return -EINVAL; 302 303 ap = ata_shost_to_port(sdev->host); 304 dev = ata_scsi_find_dev(ap, sdev); 305 if (unlikely(!dev)) 306 return -ENODEV; 307 308 spin_lock_irq(ap->lock); 309 if (input) 310 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE; 311 else 312 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; 313 314 dev->link->eh_info.action |= ATA_EH_REVALIDATE; 315 dev->link->eh_info.flags |= ATA_EHI_QUIET; 316 ata_port_schedule_eh(ap); 317 spin_unlock_irq(ap->lock); 318 319 ata_port_wait_eh(ap); 320 321 if (input) { 322 spin_lock_irq(ap->lock); 323 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) { 324 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; 325 rc = -EIO; 326 } 327 spin_unlock_irq(ap->lock); 328 } 329 330 return rc ? rc : len; 331 } 332 333 DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR, 334 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store); 335 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable); 336 337 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 338 u8 sk, u8 asc, u8 ascq) 339 { 340 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 341 342 if (!cmd) 343 return; 344 345 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 346 347 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq); 348 } 349 350 void ata_scsi_set_sense_information(struct ata_device *dev, 351 struct scsi_cmnd *cmd, 352 const struct ata_taskfile *tf) 353 { 354 u64 information; 355 356 if (!cmd) 357 return; 358 359 information = ata_tf_read_block(tf, dev); 360 if (information == U64_MAX) 361 return; 362 363 scsi_set_sense_information(cmd->sense_buffer, 364 SCSI_SENSE_BUFFERSIZE, information); 365 } 366 367 static void ata_scsi_set_invalid_field(struct ata_device *dev, 368 struct scsi_cmnd *cmd, u16 field, u8 bit) 369 { 370 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 371 /* "Invalid field in CDB" */ 372 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 373 field, bit, 1); 374 } 375 376 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 377 struct scsi_cmnd *cmd, u16 field) 378 { 379 /* "Invalid field in parameter list" */ 380 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 381 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 382 field, 0xff, 0); 383 } 384 385 static ssize_t 386 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, 387 const char *buf, size_t count) 388 { 389 struct Scsi_Host *shost = class_to_shost(dev); 390 struct ata_port *ap = ata_shost_to_port(shost); 391 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) 392 return ap->ops->em_store(ap, buf, count); 393 return -EINVAL; 394 } 395 396 static ssize_t 397 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, 398 char *buf) 399 { 400 struct Scsi_Host *shost = class_to_shost(dev); 401 struct ata_port *ap = ata_shost_to_port(shost); 402 403 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) 404 return ap->ops->em_show(ap, buf); 405 return -EINVAL; 406 } 407 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, 408 ata_scsi_em_message_show, ata_scsi_em_message_store); 409 EXPORT_SYMBOL_GPL(dev_attr_em_message); 410 411 static ssize_t 412 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, 413 char *buf) 414 { 415 struct Scsi_Host *shost = class_to_shost(dev); 416 struct ata_port *ap = ata_shost_to_port(shost); 417 418 return snprintf(buf, 23, "%d\n", ap->em_message_type); 419 } 420 DEVICE_ATTR(em_message_type, S_IRUGO, 421 ata_scsi_em_message_type_show, NULL); 422 EXPORT_SYMBOL_GPL(dev_attr_em_message_type); 423 424 static ssize_t 425 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, 426 char *buf) 427 { 428 struct scsi_device *sdev = to_scsi_device(dev); 429 struct ata_port *ap = ata_shost_to_port(sdev->host); 430 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 431 432 if (atadev && ap->ops->sw_activity_show && 433 (ap->flags & ATA_FLAG_SW_ACTIVITY)) 434 return ap->ops->sw_activity_show(atadev, buf); 435 return -EINVAL; 436 } 437 438 static ssize_t 439 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, 440 const char *buf, size_t count) 441 { 442 struct scsi_device *sdev = to_scsi_device(dev); 443 struct ata_port *ap = ata_shost_to_port(sdev->host); 444 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 445 enum sw_activity val; 446 int rc; 447 448 if (atadev && ap->ops->sw_activity_store && 449 (ap->flags & ATA_FLAG_SW_ACTIVITY)) { 450 val = simple_strtoul(buf, NULL, 0); 451 switch (val) { 452 case OFF: case BLINK_ON: case BLINK_OFF: 453 rc = ap->ops->sw_activity_store(atadev, val); 454 if (!rc) 455 return count; 456 else 457 return rc; 458 } 459 } 460 return -EINVAL; 461 } 462 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, 463 ata_scsi_activity_store); 464 EXPORT_SYMBOL_GPL(dev_attr_sw_activity); 465 466 struct device_attribute *ata_common_sdev_attrs[] = { 467 &dev_attr_unload_heads, 468 &dev_attr_ncq_prio_enable, 469 NULL 470 }; 471 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); 472 473 /** 474 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 475 * @sdev: SCSI device for which BIOS geometry is to be determined 476 * @bdev: block device associated with @sdev 477 * @capacity: capacity of SCSI device 478 * @geom: location to which geometry will be output 479 * 480 * Generic bios head/sector/cylinder calculator 481 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 482 * mapping. Some situations may arise where the disk is not 483 * bootable if this is not used. 484 * 485 * LOCKING: 486 * Defined by the SCSI layer. We don't really care. 487 * 488 * RETURNS: 489 * Zero. 490 */ 491 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 492 sector_t capacity, int geom[]) 493 { 494 geom[0] = 255; 495 geom[1] = 63; 496 sector_div(capacity, 255*63); 497 geom[2] = capacity; 498 499 return 0; 500 } 501 502 /** 503 * ata_scsi_unlock_native_capacity - unlock native capacity 504 * @sdev: SCSI device to adjust device capacity for 505 * 506 * This function is called if a partition on @sdev extends beyond 507 * the end of the device. It requests EH to unlock HPA. 508 * 509 * LOCKING: 510 * Defined by the SCSI layer. Might sleep. 511 */ 512 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 513 { 514 struct ata_port *ap = ata_shost_to_port(sdev->host); 515 struct ata_device *dev; 516 unsigned long flags; 517 518 spin_lock_irqsave(ap->lock, flags); 519 520 dev = ata_scsi_find_dev(ap, sdev); 521 if (dev && dev->n_sectors < dev->n_native_sectors) { 522 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 523 dev->link->eh_info.action |= ATA_EH_RESET; 524 ata_port_schedule_eh(ap); 525 } 526 527 spin_unlock_irqrestore(ap->lock, flags); 528 ata_port_wait_eh(ap); 529 } 530 531 /** 532 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 533 * @ap: target port 534 * @sdev: SCSI device to get identify data for 535 * @arg: User buffer area for identify data 536 * 537 * LOCKING: 538 * Defined by the SCSI layer. We don't really care. 539 * 540 * RETURNS: 541 * Zero on success, negative errno on error. 542 */ 543 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 544 void __user *arg) 545 { 546 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 547 u16 __user *dst = arg; 548 char buf[40]; 549 550 if (!dev) 551 return -ENOMSG; 552 553 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 554 return -EFAULT; 555 556 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 557 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 558 return -EFAULT; 559 560 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 561 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 562 return -EFAULT; 563 564 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 565 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 566 return -EFAULT; 567 568 return 0; 569 } 570 571 /** 572 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 573 * @scsidev: Device to which we are issuing command 574 * @arg: User provided data for issuing command 575 * 576 * LOCKING: 577 * Defined by the SCSI layer. We don't really care. 578 * 579 * RETURNS: 580 * Zero on success, negative errno on error. 581 */ 582 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 583 { 584 int rc = 0; 585 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 586 u8 scsi_cmd[MAX_COMMAND_SIZE]; 587 u8 args[4], *argbuf = NULL; 588 int argsize = 0; 589 enum dma_data_direction data_dir; 590 struct scsi_sense_hdr sshdr; 591 int cmd_result; 592 593 if (arg == NULL) 594 return -EINVAL; 595 596 if (copy_from_user(args, arg, sizeof(args))) 597 return -EFAULT; 598 599 memset(sensebuf, 0, sizeof(sensebuf)); 600 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 601 602 if (args[3]) { 603 argsize = ATA_SECT_SIZE * args[3]; 604 argbuf = kmalloc(argsize, GFP_KERNEL); 605 if (argbuf == NULL) { 606 rc = -ENOMEM; 607 goto error; 608 } 609 610 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 611 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 612 block count in sector count field */ 613 data_dir = DMA_FROM_DEVICE; 614 } else { 615 scsi_cmd[1] = (3 << 1); /* Non-data */ 616 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 617 data_dir = DMA_NONE; 618 } 619 620 scsi_cmd[0] = ATA_16; 621 622 scsi_cmd[4] = args[2]; 623 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 624 scsi_cmd[6] = args[3]; 625 scsi_cmd[8] = args[1]; 626 scsi_cmd[10] = ATA_SMART_LBAM_PASS; 627 scsi_cmd[12] = ATA_SMART_LBAH_PASS; 628 } else { 629 scsi_cmd[6] = args[1]; 630 } 631 scsi_cmd[14] = args[0]; 632 633 /* Good values for timeout and retries? Values below 634 from scsi_ioctl_send_command() for default case... */ 635 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 636 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 637 638 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 639 u8 *desc = sensebuf + 8; 640 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 641 642 /* If we set cc then ATA pass-through will cause a 643 * check condition even if no error. Filter that. */ 644 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 645 if (sshdr.sense_key == RECOVERED_ERROR && 646 sshdr.asc == 0 && sshdr.ascq == 0x1d) 647 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 648 } 649 650 /* Send userspace a few ATA registers (same as drivers/ide) */ 651 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 652 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 653 args[0] = desc[13]; /* status */ 654 args[1] = desc[3]; /* error */ 655 args[2] = desc[5]; /* sector count (0:7) */ 656 if (copy_to_user(arg, args, sizeof(args))) 657 rc = -EFAULT; 658 } 659 } 660 661 662 if (cmd_result) { 663 rc = -EIO; 664 goto error; 665 } 666 667 if ((argbuf) 668 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 669 rc = -EFAULT; 670 error: 671 kfree(argbuf); 672 return rc; 673 } 674 675 /** 676 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 677 * @scsidev: Device to which we are issuing command 678 * @arg: User provided data for issuing command 679 * 680 * LOCKING: 681 * Defined by the SCSI layer. We don't really care. 682 * 683 * RETURNS: 684 * Zero on success, negative errno on error. 685 */ 686 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 687 { 688 int rc = 0; 689 u8 sensebuf[SCSI_SENSE_BUFFERSIZE]; 690 u8 scsi_cmd[MAX_COMMAND_SIZE]; 691 u8 args[7]; 692 struct scsi_sense_hdr sshdr; 693 int cmd_result; 694 695 if (arg == NULL) 696 return -EINVAL; 697 698 if (copy_from_user(args, arg, sizeof(args))) 699 return -EFAULT; 700 701 memset(sensebuf, 0, sizeof(sensebuf)); 702 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 703 scsi_cmd[0] = ATA_16; 704 scsi_cmd[1] = (3 << 1); /* Non-data */ 705 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 706 scsi_cmd[4] = args[1]; 707 scsi_cmd[6] = args[2]; 708 scsi_cmd[8] = args[3]; 709 scsi_cmd[10] = args[4]; 710 scsi_cmd[12] = args[5]; 711 scsi_cmd[13] = args[6] & 0x4f; 712 scsi_cmd[14] = args[0]; 713 714 /* Good values for timeout and retries? Values below 715 from scsi_ioctl_send_command() for default case... */ 716 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 717 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 718 719 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 720 u8 *desc = sensebuf + 8; 721 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 722 723 /* If we set cc then ATA pass-through will cause a 724 * check condition even if no error. Filter that. */ 725 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 726 if (sshdr.sense_key == RECOVERED_ERROR && 727 sshdr.asc == 0 && sshdr.ascq == 0x1d) 728 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 729 } 730 731 /* Send userspace ATA registers */ 732 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 733 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 734 args[0] = desc[13]; /* status */ 735 args[1] = desc[3]; /* error */ 736 args[2] = desc[5]; /* sector count (0:7) */ 737 args[3] = desc[7]; /* lbal */ 738 args[4] = desc[9]; /* lbam */ 739 args[5] = desc[11]; /* lbah */ 740 args[6] = desc[12]; /* select */ 741 if (copy_to_user(arg, args, sizeof(args))) 742 rc = -EFAULT; 743 } 744 } 745 746 if (cmd_result) { 747 rc = -EIO; 748 goto error; 749 } 750 751 error: 752 return rc; 753 } 754 755 static int ata_ioc32(struct ata_port *ap) 756 { 757 if (ap->flags & ATA_FLAG_PIO_DMA) 758 return 1; 759 if (ap->pflags & ATA_PFLAG_PIO32) 760 return 1; 761 return 0; 762 } 763 764 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 765 unsigned int cmd, void __user *arg) 766 { 767 unsigned long val; 768 int rc = -EINVAL; 769 unsigned long flags; 770 771 switch (cmd) { 772 case HDIO_GET_32BIT: 773 spin_lock_irqsave(ap->lock, flags); 774 val = ata_ioc32(ap); 775 spin_unlock_irqrestore(ap->lock, flags); 776 return put_user(val, (unsigned long __user *)arg); 777 778 case HDIO_SET_32BIT: 779 val = (unsigned long) arg; 780 rc = 0; 781 spin_lock_irqsave(ap->lock, flags); 782 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 783 if (val) 784 ap->pflags |= ATA_PFLAG_PIO32; 785 else 786 ap->pflags &= ~ATA_PFLAG_PIO32; 787 } else { 788 if (val != ata_ioc32(ap)) 789 rc = -EINVAL; 790 } 791 spin_unlock_irqrestore(ap->lock, flags); 792 return rc; 793 794 case HDIO_GET_IDENTITY: 795 return ata_get_identity(ap, scsidev, arg); 796 797 case HDIO_DRIVE_CMD: 798 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 799 return -EACCES; 800 return ata_cmd_ioctl(scsidev, arg); 801 802 case HDIO_DRIVE_TASK: 803 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 804 return -EACCES; 805 return ata_task_ioctl(scsidev, arg); 806 807 default: 808 rc = -ENOTTY; 809 break; 810 } 811 812 return rc; 813 } 814 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 815 816 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, 817 void __user *arg) 818 { 819 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 820 scsidev, cmd, arg); 821 } 822 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 823 824 /** 825 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 826 * @dev: ATA device to which the new command is attached 827 * @cmd: SCSI command that originated this ATA command 828 * 829 * Obtain a reference to an unused ata_queued_cmd structure, 830 * which is the basic libata structure representing a single 831 * ATA command sent to the hardware. 832 * 833 * If a command was available, fill in the SCSI-specific 834 * portions of the structure with information on the 835 * current command. 836 * 837 * LOCKING: 838 * spin_lock_irqsave(host lock) 839 * 840 * RETURNS: 841 * Command allocated, or %NULL if none available. 842 */ 843 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 844 struct scsi_cmnd *cmd) 845 { 846 struct ata_queued_cmd *qc; 847 848 qc = ata_qc_new_init(dev, cmd->request->tag); 849 if (qc) { 850 qc->scsicmd = cmd; 851 qc->scsidone = cmd->scsi_done; 852 853 qc->sg = scsi_sglist(cmd); 854 qc->n_elem = scsi_sg_count(cmd); 855 856 if (cmd->request->rq_flags & RQF_QUIET) 857 qc->flags |= ATA_QCFLAG_QUIET; 858 } else { 859 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 860 cmd->scsi_done(cmd); 861 } 862 863 return qc; 864 } 865 866 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 867 { 868 struct scsi_cmnd *scmd = qc->scsicmd; 869 870 qc->extrabytes = scmd->request->extra_len; 871 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 872 } 873 874 /** 875 * ata_dump_status - user friendly display of error info 876 * @id: id of the port in question 877 * @tf: ptr to filled out taskfile 878 * 879 * Decode and dump the ATA error/status registers for the user so 880 * that they have some idea what really happened at the non 881 * make-believe layer. 882 * 883 * LOCKING: 884 * inherited from caller 885 */ 886 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 887 { 888 u8 stat = tf->command, err = tf->feature; 889 890 pr_warn("ata%u: status=0x%02x { ", id, stat); 891 if (stat & ATA_BUSY) { 892 pr_cont("Busy }\n"); /* Data is not valid in this case */ 893 } else { 894 if (stat & ATA_DRDY) pr_cont("DriveReady "); 895 if (stat & ATA_DF) pr_cont("DeviceFault "); 896 if (stat & ATA_DSC) pr_cont("SeekComplete "); 897 if (stat & ATA_DRQ) pr_cont("DataRequest "); 898 if (stat & ATA_CORR) pr_cont("CorrectedError "); 899 if (stat & ATA_SENSE) pr_cont("Sense "); 900 if (stat & ATA_ERR) pr_cont("Error "); 901 pr_cont("}\n"); 902 903 if (err) { 904 pr_warn("ata%u: error=0x%02x { ", id, err); 905 if (err & ATA_ABORTED) pr_cont("DriveStatusError "); 906 if (err & ATA_ICRC) { 907 if (err & ATA_ABORTED) 908 pr_cont("BadCRC "); 909 else pr_cont("Sector "); 910 } 911 if (err & ATA_UNC) pr_cont("UncorrectableError "); 912 if (err & ATA_IDNF) pr_cont("SectorIdNotFound "); 913 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound "); 914 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound "); 915 pr_cont("}\n"); 916 } 917 } 918 } 919 920 /** 921 * ata_to_sense_error - convert ATA error to SCSI error 922 * @id: ATA device number 923 * @drv_stat: value contained in ATA status register 924 * @drv_err: value contained in ATA error register 925 * @sk: the sense key we'll fill out 926 * @asc: the additional sense code we'll fill out 927 * @ascq: the additional sense code qualifier we'll fill out 928 * @verbose: be verbose 929 * 930 * Converts an ATA error into a SCSI error. Fill out pointers to 931 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 932 * format sense blocks. 933 * 934 * LOCKING: 935 * spin_lock_irqsave(host lock) 936 */ 937 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 938 u8 *asc, u8 *ascq, int verbose) 939 { 940 int i; 941 942 /* Based on the 3ware driver translation table */ 943 static const unsigned char sense_table[][4] = { 944 /* BBD|ECC|ID|MAR */ 945 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 946 // Device busy Aborted command 947 /* BBD|ECC|ID */ 948 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 949 // Device busy Aborted command 950 /* ECC|MC|MARK */ 951 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 952 // Device fault Hardware error 953 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 954 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 955 // Data CRC error SCSI parity error 956 /* MC|ID|ABRT|TRK0|MARK */ 957 {0x37, NOT_READY, 0x04, 0x00}, 958 // Unit offline Not ready 959 /* MCR|MARK */ 960 {0x09, NOT_READY, 0x04, 0x00}, 961 // Unrecovered disk error Not ready 962 /* Bad address mark */ 963 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 964 // Address mark not found for data field 965 /* TRK0 - Track 0 not found */ 966 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 967 // Hardware error 968 /* Abort: 0x04 is not translated here, see below */ 969 /* Media change request */ 970 {0x08, NOT_READY, 0x04, 0x00}, 971 // FIXME: faking offline 972 /* SRV/IDNF - ID not found */ 973 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 974 // Logical address out of range 975 /* MC - Media Changed */ 976 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 977 // Not ready to ready change, medium may have changed 978 /* ECC - Uncorrectable ECC error */ 979 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 980 // Unrecovered read error 981 /* BBD - block marked bad */ 982 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 983 // Block marked bad Medium error, unrecovered read error 984 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 985 }; 986 static const unsigned char stat_table[][4] = { 987 /* Must be first because BUSY means no other bits valid */ 988 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 989 // Busy, fake parity for now 990 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 991 // Device ready, unaligned write command 992 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 993 // Device fault, internal target failure 994 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 995 // Timed out in xfer, fake parity for now 996 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 997 // Recovered ECC error Medium error, recovered 998 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 999 }; 1000 1001 /* 1002 * Is this an error we can process/parse 1003 */ 1004 if (drv_stat & ATA_BUSY) { 1005 drv_err = 0; /* Ignore the err bits, they're invalid */ 1006 } 1007 1008 if (drv_err) { 1009 /* Look for drv_err */ 1010 for (i = 0; sense_table[i][0] != 0xFF; i++) { 1011 /* Look for best matches first */ 1012 if ((sense_table[i][0] & drv_err) == 1013 sense_table[i][0]) { 1014 *sk = sense_table[i][1]; 1015 *asc = sense_table[i][2]; 1016 *ascq = sense_table[i][3]; 1017 goto translate_done; 1018 } 1019 } 1020 } 1021 1022 /* 1023 * Fall back to interpreting status bits. Note that if the drv_err 1024 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 1025 * is not descriptive enough. 1026 */ 1027 for (i = 0; stat_table[i][0] != 0xFF; i++) { 1028 if (stat_table[i][0] & drv_stat) { 1029 *sk = stat_table[i][1]; 1030 *asc = stat_table[i][2]; 1031 *ascq = stat_table[i][3]; 1032 goto translate_done; 1033 } 1034 } 1035 1036 /* 1037 * We need a sensible error return here, which is tricky, and one 1038 * that won't cause people to do things like return a disk wrongly. 1039 */ 1040 *sk = ABORTED_COMMAND; 1041 *asc = 0x00; 1042 *ascq = 0x00; 1043 1044 translate_done: 1045 if (verbose) 1046 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 1047 id, drv_stat, drv_err, *sk, *asc, *ascq); 1048 return; 1049 } 1050 1051 /* 1052 * ata_gen_passthru_sense - Generate check condition sense block. 1053 * @qc: Command that completed. 1054 * 1055 * This function is specific to the ATA descriptor format sense 1056 * block specified for the ATA pass through commands. Regardless 1057 * of whether the command errored or not, return a sense 1058 * block. Copy all controller registers into the sense 1059 * block. If there was no error, we get the request from an ATA 1060 * passthrough command, so we use the following sense data: 1061 * sk = RECOVERED ERROR 1062 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1063 * 1064 * 1065 * LOCKING: 1066 * None. 1067 */ 1068 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 1069 { 1070 struct scsi_cmnd *cmd = qc->scsicmd; 1071 struct ata_taskfile *tf = &qc->result_tf; 1072 unsigned char *sb = cmd->sense_buffer; 1073 unsigned char *desc = sb + 8; 1074 int verbose = qc->ap->ops->error_handler == NULL; 1075 u8 sense_key, asc, ascq; 1076 1077 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1078 1079 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1080 1081 /* 1082 * Use ata_to_sense_error() to map status register bits 1083 * onto sense key, asc & ascq. 1084 */ 1085 if (qc->err_mask || 1086 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1087 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1088 &sense_key, &asc, &ascq, verbose); 1089 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 1090 } else { 1091 /* 1092 * ATA PASS-THROUGH INFORMATION AVAILABLE 1093 * Always in descriptor format sense. 1094 */ 1095 scsi_build_sense_buffer(1, cmd->sense_buffer, 1096 RECOVERED_ERROR, 0, 0x1D); 1097 } 1098 1099 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 1100 u8 len; 1101 1102 /* descriptor format */ 1103 len = sb[7]; 1104 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 1105 if (!desc) { 1106 if (SCSI_SENSE_BUFFERSIZE < len + 14) 1107 return; 1108 sb[7] = len + 14; 1109 desc = sb + 8 + len; 1110 } 1111 desc[0] = 9; 1112 desc[1] = 12; 1113 /* 1114 * Copy registers into sense buffer. 1115 */ 1116 desc[2] = 0x00; 1117 desc[3] = tf->feature; /* == error reg */ 1118 desc[5] = tf->nsect; 1119 desc[7] = tf->lbal; 1120 desc[9] = tf->lbam; 1121 desc[11] = tf->lbah; 1122 desc[12] = tf->device; 1123 desc[13] = tf->command; /* == status reg */ 1124 1125 /* 1126 * Fill in Extend bit, and the high order bytes 1127 * if applicable. 1128 */ 1129 if (tf->flags & ATA_TFLAG_LBA48) { 1130 desc[2] |= 0x01; 1131 desc[4] = tf->hob_nsect; 1132 desc[6] = tf->hob_lbal; 1133 desc[8] = tf->hob_lbam; 1134 desc[10] = tf->hob_lbah; 1135 } 1136 } else { 1137 /* Fixed sense format */ 1138 desc[0] = tf->feature; 1139 desc[1] = tf->command; /* status */ 1140 desc[2] = tf->device; 1141 desc[3] = tf->nsect; 1142 desc[7] = 0; 1143 if (tf->flags & ATA_TFLAG_LBA48) { 1144 desc[8] |= 0x80; 1145 if (tf->hob_nsect) 1146 desc[8] |= 0x40; 1147 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 1148 desc[8] |= 0x20; 1149 } 1150 desc[9] = tf->lbal; 1151 desc[10] = tf->lbam; 1152 desc[11] = tf->lbah; 1153 } 1154 } 1155 1156 /** 1157 * ata_gen_ata_sense - generate a SCSI fixed sense block 1158 * @qc: Command that we are erroring out 1159 * 1160 * Generate sense block for a failed ATA command @qc. Descriptor 1161 * format is used to accommodate LBA48 block address. 1162 * 1163 * LOCKING: 1164 * None. 1165 */ 1166 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 1167 { 1168 struct ata_device *dev = qc->dev; 1169 struct scsi_cmnd *cmd = qc->scsicmd; 1170 struct ata_taskfile *tf = &qc->result_tf; 1171 unsigned char *sb = cmd->sense_buffer; 1172 int verbose = qc->ap->ops->error_handler == NULL; 1173 u64 block; 1174 u8 sense_key, asc, ascq; 1175 1176 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1177 1178 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1179 1180 if (ata_dev_disabled(dev)) { 1181 /* Device disabled after error recovery */ 1182 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 1183 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 1184 return; 1185 } 1186 /* Use ata_to_sense_error() to map status register bits 1187 * onto sense key, asc & ascq. 1188 */ 1189 if (qc->err_mask || 1190 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1191 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1192 &sense_key, &asc, &ascq, verbose); 1193 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1194 } else { 1195 /* Could not decode error */ 1196 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1197 tf->command, qc->err_mask); 1198 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1199 return; 1200 } 1201 1202 block = ata_tf_read_block(&qc->result_tf, dev); 1203 if (block == U64_MAX) 1204 return; 1205 1206 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1207 } 1208 1209 static void ata_scsi_sdev_config(struct scsi_device *sdev) 1210 { 1211 sdev->use_10_for_rw = 1; 1212 sdev->use_10_for_ms = 1; 1213 sdev->no_write_same = 1; 1214 1215 /* Schedule policy is determined by ->qc_defer() callback and 1216 * it needs to see every deferred qc. Set dev_blocked to 1 to 1217 * prevent SCSI midlayer from automatically deferring 1218 * requests. 1219 */ 1220 sdev->max_device_blocked = 1; 1221 } 1222 1223 /** 1224 * atapi_drain_needed - Check whether data transfer may overflow 1225 * @rq: request to be checked 1226 * 1227 * ATAPI commands which transfer variable length data to host 1228 * might overflow due to application error or hardware bug. This 1229 * function checks whether overflow should be drained and ignored 1230 * for @request. 1231 * 1232 * LOCKING: 1233 * None. 1234 * 1235 * RETURNS: 1236 * 1 if ; otherwise, 0. 1237 */ 1238 static int atapi_drain_needed(struct request *rq) 1239 { 1240 if (likely(!blk_rq_is_passthrough(rq))) 1241 return 0; 1242 1243 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq))) 1244 return 0; 1245 1246 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; 1247 } 1248 1249 static int ata_scsi_dev_config(struct scsi_device *sdev, 1250 struct ata_device *dev) 1251 { 1252 struct request_queue *q = sdev->request_queue; 1253 1254 if (!ata_id_has_unload(dev->id)) 1255 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1256 1257 /* configure max sectors */ 1258 blk_queue_max_hw_sectors(q, dev->max_sectors); 1259 1260 if (dev->class == ATA_DEV_ATAPI) { 1261 void *buf; 1262 1263 sdev->sector_size = ATA_SECT_SIZE; 1264 1265 /* set DMA padding */ 1266 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1267 1268 /* configure draining */ 1269 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1270 if (!buf) { 1271 ata_dev_err(dev, "drain buffer allocation failed\n"); 1272 return -ENOMEM; 1273 } 1274 1275 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1276 } else { 1277 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1278 sdev->manage_start_stop = 1; 1279 } 1280 1281 /* 1282 * ata_pio_sectors() expects buffer for each sector to not cross 1283 * page boundary. Enforce it by requiring buffers to be sector 1284 * aligned, which works iff sector_size is not larger than 1285 * PAGE_SIZE. ATAPI devices also need the alignment as 1286 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1287 */ 1288 if (sdev->sector_size > PAGE_SIZE) 1289 ata_dev_warn(dev, 1290 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1291 sdev->sector_size); 1292 1293 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1294 1295 if (dev->flags & ATA_DFLAG_AN) 1296 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1297 1298 if (dev->flags & ATA_DFLAG_NCQ) { 1299 int depth; 1300 1301 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1302 depth = min(ATA_MAX_QUEUE, depth); 1303 scsi_change_queue_depth(sdev, depth); 1304 } 1305 1306 if (dev->flags & ATA_DFLAG_TRUSTED) 1307 sdev->security_supported = 1; 1308 1309 dev->sdev = sdev; 1310 return 0; 1311 } 1312 1313 /** 1314 * ata_scsi_slave_config - Set SCSI device attributes 1315 * @sdev: SCSI device to examine 1316 * 1317 * This is called before we actually start reading 1318 * and writing to the device, to configure certain 1319 * SCSI mid-layer behaviors. 1320 * 1321 * LOCKING: 1322 * Defined by SCSI layer. We don't really care. 1323 */ 1324 1325 int ata_scsi_slave_config(struct scsi_device *sdev) 1326 { 1327 struct ata_port *ap = ata_shost_to_port(sdev->host); 1328 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1329 int rc = 0; 1330 1331 ata_scsi_sdev_config(sdev); 1332 1333 if (dev) 1334 rc = ata_scsi_dev_config(sdev, dev); 1335 1336 return rc; 1337 } 1338 1339 /** 1340 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1341 * @sdev: SCSI device to be destroyed 1342 * 1343 * @sdev is about to be destroyed for hot/warm unplugging. If 1344 * this unplugging was initiated by libata as indicated by NULL 1345 * dev->sdev, this function doesn't have to do anything. 1346 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1347 * Clear dev->sdev, schedule the device for ATA detach and invoke 1348 * EH. 1349 * 1350 * LOCKING: 1351 * Defined by SCSI layer. We don't really care. 1352 */ 1353 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1354 { 1355 struct ata_port *ap = ata_shost_to_port(sdev->host); 1356 struct request_queue *q = sdev->request_queue; 1357 unsigned long flags; 1358 struct ata_device *dev; 1359 1360 if (!ap->ops->error_handler) 1361 return; 1362 1363 spin_lock_irqsave(ap->lock, flags); 1364 dev = __ata_scsi_find_dev(ap, sdev); 1365 if (dev && dev->sdev) { 1366 /* SCSI device already in CANCEL state, no need to offline it */ 1367 dev->sdev = NULL; 1368 dev->flags |= ATA_DFLAG_DETACH; 1369 ata_port_schedule_eh(ap); 1370 } 1371 spin_unlock_irqrestore(ap->lock, flags); 1372 1373 kfree(q->dma_drain_buffer); 1374 q->dma_drain_buffer = NULL; 1375 q->dma_drain_size = 0; 1376 } 1377 1378 /** 1379 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth 1380 * @ap: ATA port to which the device change the queue depth 1381 * @sdev: SCSI device to configure queue depth for 1382 * @queue_depth: new queue depth 1383 * 1384 * libsas and libata have different approaches for associating a sdev to 1385 * its ata_port. 1386 * 1387 */ 1388 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1389 int queue_depth) 1390 { 1391 struct ata_device *dev; 1392 unsigned long flags; 1393 1394 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1395 return sdev->queue_depth; 1396 1397 dev = ata_scsi_find_dev(ap, sdev); 1398 if (!dev || !ata_dev_enabled(dev)) 1399 return sdev->queue_depth; 1400 1401 /* NCQ enabled? */ 1402 spin_lock_irqsave(ap->lock, flags); 1403 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1404 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1405 dev->flags |= ATA_DFLAG_NCQ_OFF; 1406 queue_depth = 1; 1407 } 1408 spin_unlock_irqrestore(ap->lock, flags); 1409 1410 /* limit and apply queue depth */ 1411 queue_depth = min(queue_depth, sdev->host->can_queue); 1412 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1413 queue_depth = min(queue_depth, ATA_MAX_QUEUE); 1414 1415 if (sdev->queue_depth == queue_depth) 1416 return -EINVAL; 1417 1418 return scsi_change_queue_depth(sdev, queue_depth); 1419 } 1420 1421 /** 1422 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1423 * @sdev: SCSI device to configure queue depth for 1424 * @queue_depth: new queue depth 1425 * 1426 * This is libata standard hostt->change_queue_depth callback. 1427 * SCSI will call into this callback when user tries to set queue 1428 * depth via sysfs. 1429 * 1430 * LOCKING: 1431 * SCSI layer (we don't care) 1432 * 1433 * RETURNS: 1434 * Newly configured queue depth. 1435 */ 1436 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) 1437 { 1438 struct ata_port *ap = ata_shost_to_port(sdev->host); 1439 1440 return __ata_change_queue_depth(ap, sdev, queue_depth); 1441 } 1442 1443 /** 1444 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1445 * @qc: Storage for translated ATA taskfile 1446 * 1447 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1448 * (to start). Perhaps these commands should be preceded by 1449 * CHECK POWER MODE to see what power mode the device is already in. 1450 * [See SAT revision 5 at www.t10.org] 1451 * 1452 * LOCKING: 1453 * spin_lock_irqsave(host lock) 1454 * 1455 * RETURNS: 1456 * Zero on success, non-zero on error. 1457 */ 1458 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1459 { 1460 struct scsi_cmnd *scmd = qc->scsicmd; 1461 struct ata_taskfile *tf = &qc->tf; 1462 const u8 *cdb = scmd->cmnd; 1463 u16 fp; 1464 u8 bp = 0xff; 1465 1466 if (scmd->cmd_len < 5) { 1467 fp = 4; 1468 goto invalid_fld; 1469 } 1470 1471 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1472 tf->protocol = ATA_PROT_NODATA; 1473 if (cdb[1] & 0x1) { 1474 ; /* ignore IMMED bit, violates sat-r05 */ 1475 } 1476 if (cdb[4] & 0x2) { 1477 fp = 4; 1478 bp = 1; 1479 goto invalid_fld; /* LOEJ bit set not supported */ 1480 } 1481 if (((cdb[4] >> 4) & 0xf) != 0) { 1482 fp = 4; 1483 bp = 3; 1484 goto invalid_fld; /* power conditions not supported */ 1485 } 1486 1487 if (cdb[4] & 0x1) { 1488 tf->nsect = 1; /* 1 sector, lba=0 */ 1489 1490 if (qc->dev->flags & ATA_DFLAG_LBA) { 1491 tf->flags |= ATA_TFLAG_LBA; 1492 1493 tf->lbah = 0x0; 1494 tf->lbam = 0x0; 1495 tf->lbal = 0x0; 1496 tf->device |= ATA_LBA; 1497 } else { 1498 /* CHS */ 1499 tf->lbal = 0x1; /* sect */ 1500 tf->lbam = 0x0; /* cyl low */ 1501 tf->lbah = 0x0; /* cyl high */ 1502 } 1503 1504 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1505 } else { 1506 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1507 * or S5) causing some drives to spin up and down again. 1508 */ 1509 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1510 system_state == SYSTEM_POWER_OFF) 1511 goto skip; 1512 1513 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1514 system_entering_hibernation()) 1515 goto skip; 1516 1517 /* Issue ATA STANDBY IMMEDIATE command */ 1518 tf->command = ATA_CMD_STANDBYNOW1; 1519 } 1520 1521 /* 1522 * Standby and Idle condition timers could be implemented but that 1523 * would require libata to implement the Power condition mode page 1524 * and allow the user to change it. Changing mode pages requires 1525 * MODE SELECT to be implemented. 1526 */ 1527 1528 return 0; 1529 1530 invalid_fld: 1531 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1532 return 1; 1533 skip: 1534 scmd->result = SAM_STAT_GOOD; 1535 return 1; 1536 } 1537 1538 1539 /** 1540 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1541 * @qc: Storage for translated ATA taskfile 1542 * 1543 * Sets up an ATA taskfile to issue FLUSH CACHE or 1544 * FLUSH CACHE EXT. 1545 * 1546 * LOCKING: 1547 * spin_lock_irqsave(host lock) 1548 * 1549 * RETURNS: 1550 * Zero on success, non-zero on error. 1551 */ 1552 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1553 { 1554 struct ata_taskfile *tf = &qc->tf; 1555 1556 tf->flags |= ATA_TFLAG_DEVICE; 1557 tf->protocol = ATA_PROT_NODATA; 1558 1559 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1560 tf->command = ATA_CMD_FLUSH_EXT; 1561 else 1562 tf->command = ATA_CMD_FLUSH; 1563 1564 /* flush is critical for IO integrity, consider it an IO command */ 1565 qc->flags |= ATA_QCFLAG_IO; 1566 1567 return 0; 1568 } 1569 1570 /** 1571 * scsi_6_lba_len - Get LBA and transfer length 1572 * @cdb: SCSI command to translate 1573 * 1574 * Calculate LBA and transfer length for 6-byte commands. 1575 * 1576 * RETURNS: 1577 * @plba: the LBA 1578 * @plen: the transfer length 1579 */ 1580 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1581 { 1582 u64 lba = 0; 1583 u32 len; 1584 1585 VPRINTK("six-byte command\n"); 1586 1587 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1588 lba |= ((u64)cdb[2]) << 8; 1589 lba |= ((u64)cdb[3]); 1590 1591 len = cdb[4]; 1592 1593 *plba = lba; 1594 *plen = len; 1595 } 1596 1597 /** 1598 * scsi_10_lba_len - Get LBA and transfer length 1599 * @cdb: SCSI command to translate 1600 * 1601 * Calculate LBA and transfer length for 10-byte commands. 1602 * 1603 * RETURNS: 1604 * @plba: the LBA 1605 * @plen: the transfer length 1606 */ 1607 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1608 { 1609 u64 lba = 0; 1610 u32 len = 0; 1611 1612 VPRINTK("ten-byte command\n"); 1613 1614 lba |= ((u64)cdb[2]) << 24; 1615 lba |= ((u64)cdb[3]) << 16; 1616 lba |= ((u64)cdb[4]) << 8; 1617 lba |= ((u64)cdb[5]); 1618 1619 len |= ((u32)cdb[7]) << 8; 1620 len |= ((u32)cdb[8]); 1621 1622 *plba = lba; 1623 *plen = len; 1624 } 1625 1626 /** 1627 * scsi_16_lba_len - Get LBA and transfer length 1628 * @cdb: SCSI command to translate 1629 * 1630 * Calculate LBA and transfer length for 16-byte commands. 1631 * 1632 * RETURNS: 1633 * @plba: the LBA 1634 * @plen: the transfer length 1635 */ 1636 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1637 { 1638 u64 lba = 0; 1639 u32 len = 0; 1640 1641 VPRINTK("sixteen-byte command\n"); 1642 1643 lba |= ((u64)cdb[2]) << 56; 1644 lba |= ((u64)cdb[3]) << 48; 1645 lba |= ((u64)cdb[4]) << 40; 1646 lba |= ((u64)cdb[5]) << 32; 1647 lba |= ((u64)cdb[6]) << 24; 1648 lba |= ((u64)cdb[7]) << 16; 1649 lba |= ((u64)cdb[8]) << 8; 1650 lba |= ((u64)cdb[9]); 1651 1652 len |= ((u32)cdb[10]) << 24; 1653 len |= ((u32)cdb[11]) << 16; 1654 len |= ((u32)cdb[12]) << 8; 1655 len |= ((u32)cdb[13]); 1656 1657 *plba = lba; 1658 *plen = len; 1659 } 1660 1661 /** 1662 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1663 * @qc: Storage for translated ATA taskfile 1664 * 1665 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1666 * 1667 * LOCKING: 1668 * spin_lock_irqsave(host lock) 1669 * 1670 * RETURNS: 1671 * Zero on success, non-zero on error. 1672 */ 1673 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1674 { 1675 struct scsi_cmnd *scmd = qc->scsicmd; 1676 struct ata_taskfile *tf = &qc->tf; 1677 struct ata_device *dev = qc->dev; 1678 u64 dev_sectors = qc->dev->n_sectors; 1679 const u8 *cdb = scmd->cmnd; 1680 u64 block; 1681 u32 n_block; 1682 u16 fp; 1683 1684 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1685 tf->protocol = ATA_PROT_NODATA; 1686 1687 if (cdb[0] == VERIFY) { 1688 if (scmd->cmd_len < 10) { 1689 fp = 9; 1690 goto invalid_fld; 1691 } 1692 scsi_10_lba_len(cdb, &block, &n_block); 1693 } else if (cdb[0] == VERIFY_16) { 1694 if (scmd->cmd_len < 16) { 1695 fp = 15; 1696 goto invalid_fld; 1697 } 1698 scsi_16_lba_len(cdb, &block, &n_block); 1699 } else { 1700 fp = 0; 1701 goto invalid_fld; 1702 } 1703 1704 if (!n_block) 1705 goto nothing_to_do; 1706 if (block >= dev_sectors) 1707 goto out_of_range; 1708 if ((block + n_block) > dev_sectors) 1709 goto out_of_range; 1710 1711 if (dev->flags & ATA_DFLAG_LBA) { 1712 tf->flags |= ATA_TFLAG_LBA; 1713 1714 if (lba_28_ok(block, n_block)) { 1715 /* use LBA28 */ 1716 tf->command = ATA_CMD_VERIFY; 1717 tf->device |= (block >> 24) & 0xf; 1718 } else if (lba_48_ok(block, n_block)) { 1719 if (!(dev->flags & ATA_DFLAG_LBA48)) 1720 goto out_of_range; 1721 1722 /* use LBA48 */ 1723 tf->flags |= ATA_TFLAG_LBA48; 1724 tf->command = ATA_CMD_VERIFY_EXT; 1725 1726 tf->hob_nsect = (n_block >> 8) & 0xff; 1727 1728 tf->hob_lbah = (block >> 40) & 0xff; 1729 tf->hob_lbam = (block >> 32) & 0xff; 1730 tf->hob_lbal = (block >> 24) & 0xff; 1731 } else 1732 /* request too large even for LBA48 */ 1733 goto out_of_range; 1734 1735 tf->nsect = n_block & 0xff; 1736 1737 tf->lbah = (block >> 16) & 0xff; 1738 tf->lbam = (block >> 8) & 0xff; 1739 tf->lbal = block & 0xff; 1740 1741 tf->device |= ATA_LBA; 1742 } else { 1743 /* CHS */ 1744 u32 sect, head, cyl, track; 1745 1746 if (!lba_28_ok(block, n_block)) 1747 goto out_of_range; 1748 1749 /* Convert LBA to CHS */ 1750 track = (u32)block / dev->sectors; 1751 cyl = track / dev->heads; 1752 head = track % dev->heads; 1753 sect = (u32)block % dev->sectors + 1; 1754 1755 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1756 (u32)block, track, cyl, head, sect); 1757 1758 /* Check whether the converted CHS can fit. 1759 Cylinder: 0-65535 1760 Head: 0-15 1761 Sector: 1-255*/ 1762 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1763 goto out_of_range; 1764 1765 tf->command = ATA_CMD_VERIFY; 1766 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1767 tf->lbal = sect; 1768 tf->lbam = cyl; 1769 tf->lbah = cyl >> 8; 1770 tf->device |= head; 1771 } 1772 1773 return 0; 1774 1775 invalid_fld: 1776 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1777 return 1; 1778 1779 out_of_range: 1780 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1781 /* "Logical Block Address out of range" */ 1782 return 1; 1783 1784 nothing_to_do: 1785 scmd->result = SAM_STAT_GOOD; 1786 return 1; 1787 } 1788 1789 /** 1790 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1791 * @qc: Storage for translated ATA taskfile 1792 * 1793 * Converts any of six SCSI read/write commands into the 1794 * ATA counterpart, including starting sector (LBA), 1795 * sector count, and taking into account the device's LBA48 1796 * support. 1797 * 1798 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1799 * %WRITE_16 are currently supported. 1800 * 1801 * LOCKING: 1802 * spin_lock_irqsave(host lock) 1803 * 1804 * RETURNS: 1805 * Zero on success, non-zero on error. 1806 */ 1807 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1808 { 1809 struct scsi_cmnd *scmd = qc->scsicmd; 1810 const u8 *cdb = scmd->cmnd; 1811 struct request *rq = scmd->request; 1812 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1813 unsigned int tf_flags = 0; 1814 u64 block; 1815 u32 n_block; 1816 int rc; 1817 u16 fp = 0; 1818 1819 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1820 tf_flags |= ATA_TFLAG_WRITE; 1821 1822 /* Calculate the SCSI LBA, transfer length and FUA. */ 1823 switch (cdb[0]) { 1824 case READ_10: 1825 case WRITE_10: 1826 if (unlikely(scmd->cmd_len < 10)) { 1827 fp = 9; 1828 goto invalid_fld; 1829 } 1830 scsi_10_lba_len(cdb, &block, &n_block); 1831 if (cdb[1] & (1 << 3)) 1832 tf_flags |= ATA_TFLAG_FUA; 1833 break; 1834 case READ_6: 1835 case WRITE_6: 1836 if (unlikely(scmd->cmd_len < 6)) { 1837 fp = 5; 1838 goto invalid_fld; 1839 } 1840 scsi_6_lba_len(cdb, &block, &n_block); 1841 1842 /* for 6-byte r/w commands, transfer length 0 1843 * means 256 blocks of data, not 0 block. 1844 */ 1845 if (!n_block) 1846 n_block = 256; 1847 break; 1848 case READ_16: 1849 case WRITE_16: 1850 if (unlikely(scmd->cmd_len < 16)) { 1851 fp = 15; 1852 goto invalid_fld; 1853 } 1854 scsi_16_lba_len(cdb, &block, &n_block); 1855 if (cdb[1] & (1 << 3)) 1856 tf_flags |= ATA_TFLAG_FUA; 1857 break; 1858 default: 1859 DPRINTK("no-byte command\n"); 1860 fp = 0; 1861 goto invalid_fld; 1862 } 1863 1864 /* Check and compose ATA command */ 1865 if (!n_block) 1866 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1867 * length 0 means transfer 0 block of data. 1868 * However, for ATA R/W commands, sector count 0 means 1869 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1870 * 1871 * WARNING: one or two older ATA drives treat 0 as 0... 1872 */ 1873 goto nothing_to_do; 1874 1875 qc->flags |= ATA_QCFLAG_IO; 1876 qc->nbytes = n_block * scmd->device->sector_size; 1877 1878 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1879 qc->hw_tag, class); 1880 1881 if (likely(rc == 0)) 1882 return 0; 1883 1884 if (rc == -ERANGE) 1885 goto out_of_range; 1886 /* treat all other errors as -EINVAL, fall through */ 1887 invalid_fld: 1888 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1889 return 1; 1890 1891 out_of_range: 1892 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1893 /* "Logical Block Address out of range" */ 1894 return 1; 1895 1896 nothing_to_do: 1897 scmd->result = SAM_STAT_GOOD; 1898 return 1; 1899 } 1900 1901 static void ata_qc_done(struct ata_queued_cmd *qc) 1902 { 1903 struct scsi_cmnd *cmd = qc->scsicmd; 1904 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1905 1906 ata_qc_free(qc); 1907 done(cmd); 1908 } 1909 1910 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1911 { 1912 struct ata_port *ap = qc->ap; 1913 struct scsi_cmnd *cmd = qc->scsicmd; 1914 u8 *cdb = cmd->cmnd; 1915 int need_sense = (qc->err_mask != 0); 1916 1917 /* For ATA pass thru (SAT) commands, generate a sense block if 1918 * user mandated it or if there's an error. Note that if we 1919 * generate because the user forced us to [CK_COND =1], a check 1920 * condition is generated and the ATA register values are returned 1921 * whether the command completed successfully or not. If there 1922 * was no error, we use the following sense data: 1923 * sk = RECOVERED ERROR 1924 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1925 */ 1926 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1927 ((cdb[2] & 0x20) || need_sense)) 1928 ata_gen_passthru_sense(qc); 1929 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1930 cmd->result = SAM_STAT_CHECK_CONDITION; 1931 else if (need_sense) 1932 ata_gen_ata_sense(qc); 1933 else 1934 cmd->result = SAM_STAT_GOOD; 1935 1936 if (need_sense && !ap->ops->error_handler) 1937 ata_dump_status(ap->print_id, &qc->result_tf); 1938 1939 ata_qc_done(qc); 1940 } 1941 1942 /** 1943 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1944 * @dev: ATA device to which the command is addressed 1945 * @cmd: SCSI command to execute 1946 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1947 * 1948 * Our ->queuecommand() function has decided that the SCSI 1949 * command issued can be directly translated into an ATA 1950 * command, rather than handled internally. 1951 * 1952 * This function sets up an ata_queued_cmd structure for the 1953 * SCSI command, and sends that ata_queued_cmd to the hardware. 1954 * 1955 * The xlat_func argument (actor) returns 0 if ready to execute 1956 * ATA command, else 1 to finish translation. If 1 is returned 1957 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1958 * to be set reflecting an error condition or clean (early) 1959 * termination. 1960 * 1961 * LOCKING: 1962 * spin_lock_irqsave(host lock) 1963 * 1964 * RETURNS: 1965 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1966 * needs to be deferred. 1967 */ 1968 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1969 ata_xlat_func_t xlat_func) 1970 { 1971 struct ata_port *ap = dev->link->ap; 1972 struct ata_queued_cmd *qc; 1973 int rc; 1974 1975 VPRINTK("ENTER\n"); 1976 1977 qc = ata_scsi_qc_new(dev, cmd); 1978 if (!qc) 1979 goto err_mem; 1980 1981 /* data is present; dma-map it */ 1982 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1983 cmd->sc_data_direction == DMA_TO_DEVICE) { 1984 if (unlikely(scsi_bufflen(cmd) < 1)) { 1985 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1986 goto err_did; 1987 } 1988 1989 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1990 1991 qc->dma_dir = cmd->sc_data_direction; 1992 } 1993 1994 qc->complete_fn = ata_scsi_qc_complete; 1995 1996 if (xlat_func(qc)) 1997 goto early_finish; 1998 1999 if (ap->ops->qc_defer) { 2000 if ((rc = ap->ops->qc_defer(qc))) 2001 goto defer; 2002 } 2003 2004 /* select device, send command to hardware */ 2005 ata_qc_issue(qc); 2006 2007 VPRINTK("EXIT\n"); 2008 return 0; 2009 2010 early_finish: 2011 ata_qc_free(qc); 2012 cmd->scsi_done(cmd); 2013 DPRINTK("EXIT - early finish (good or error)\n"); 2014 return 0; 2015 2016 err_did: 2017 ata_qc_free(qc); 2018 cmd->result = (DID_ERROR << 16); 2019 cmd->scsi_done(cmd); 2020 err_mem: 2021 DPRINTK("EXIT - internal\n"); 2022 return 0; 2023 2024 defer: 2025 ata_qc_free(qc); 2026 DPRINTK("EXIT - defer\n"); 2027 if (rc == ATA_DEFER_LINK) 2028 return SCSI_MLQUEUE_DEVICE_BUSY; 2029 else 2030 return SCSI_MLQUEUE_HOST_BUSY; 2031 } 2032 2033 struct ata_scsi_args { 2034 struct ata_device *dev; 2035 u16 *id; 2036 struct scsi_cmnd *cmd; 2037 }; 2038 2039 /** 2040 * ata_scsi_rbuf_get - Map response buffer. 2041 * @cmd: SCSI command containing buffer to be mapped. 2042 * @flags: unsigned long variable to store irq enable status 2043 * @copy_in: copy in from user buffer 2044 * 2045 * Prepare buffer for simulated SCSI commands. 2046 * 2047 * LOCKING: 2048 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 2049 * 2050 * RETURNS: 2051 * Pointer to response buffer. 2052 */ 2053 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 2054 unsigned long *flags) 2055 { 2056 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 2057 2058 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 2059 if (copy_in) 2060 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2061 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2062 return ata_scsi_rbuf; 2063 } 2064 2065 /** 2066 * ata_scsi_rbuf_put - Unmap response buffer. 2067 * @cmd: SCSI command containing buffer to be unmapped. 2068 * @copy_out: copy out result 2069 * @flags: @flags passed to ata_scsi_rbuf_get() 2070 * 2071 * Returns rbuf buffer. The result is copied to @cmd's buffer if 2072 * @copy_back is true. 2073 * 2074 * LOCKING: 2075 * Unlocks ata_scsi_rbuf_lock. 2076 */ 2077 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 2078 unsigned long *flags) 2079 { 2080 if (copy_out) 2081 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2082 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2083 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 2084 } 2085 2086 /** 2087 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 2088 * @args: device IDENTIFY data / SCSI command of interest. 2089 * @actor: Callback hook for desired SCSI command simulator 2090 * 2091 * Takes care of the hard work of simulating a SCSI command... 2092 * Mapping the response buffer, calling the command's handler, 2093 * and handling the handler's return value. This return value 2094 * indicates whether the handler wishes the SCSI command to be 2095 * completed successfully (0), or not (in which case cmd->result 2096 * and sense buffer are assumed to be set). 2097 * 2098 * LOCKING: 2099 * spin_lock_irqsave(host lock) 2100 */ 2101 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 2102 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 2103 { 2104 u8 *rbuf; 2105 unsigned int rc; 2106 struct scsi_cmnd *cmd = args->cmd; 2107 unsigned long flags; 2108 2109 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 2110 rc = actor(args, rbuf); 2111 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 2112 2113 if (rc == 0) 2114 cmd->result = SAM_STAT_GOOD; 2115 } 2116 2117 /** 2118 * ata_scsiop_inq_std - Simulate INQUIRY command 2119 * @args: device IDENTIFY data / SCSI command of interest. 2120 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2121 * 2122 * Returns standard device identification data associated 2123 * with non-VPD INQUIRY command output. 2124 * 2125 * LOCKING: 2126 * spin_lock_irqsave(host lock) 2127 */ 2128 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 2129 { 2130 static const u8 versions[] = { 2131 0x00, 2132 0x60, /* SAM-3 (no version claimed) */ 2133 2134 0x03, 2135 0x20, /* SBC-2 (no version claimed) */ 2136 2137 0x03, 2138 0x00 /* SPC-3 (no version claimed) */ 2139 }; 2140 static const u8 versions_zbc[] = { 2141 0x00, 2142 0xA0, /* SAM-5 (no version claimed) */ 2143 2144 0x06, 2145 0x00, /* SBC-4 (no version claimed) */ 2146 2147 0x05, 2148 0xC0, /* SPC-5 (no version claimed) */ 2149 2150 0x60, 2151 0x24, /* ZBC r05 */ 2152 }; 2153 2154 u8 hdr[] = { 2155 TYPE_DISK, 2156 0, 2157 0x5, /* claim SPC-3 version compatibility */ 2158 2, 2159 95 - 4, 2160 0, 2161 0, 2162 2 2163 }; 2164 2165 VPRINTK("ENTER\n"); 2166 2167 /* set scsi removable (RMB) bit per ata bit, or if the 2168 * AHCI port says it's external (Hotplug-capable, eSATA). 2169 */ 2170 if (ata_id_removable(args->id) || 2171 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 2172 hdr[1] |= (1 << 7); 2173 2174 if (args->dev->class == ATA_DEV_ZAC) { 2175 hdr[0] = TYPE_ZBC; 2176 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 2177 } 2178 2179 memcpy(rbuf, hdr, sizeof(hdr)); 2180 memcpy(&rbuf[8], "ATA ", 8); 2181 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 2182 2183 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2184 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2185 if (strncmp(&rbuf[32], " ", 4) == 0) 2186 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2187 2188 if (rbuf[32] == 0 || rbuf[32] == ' ') 2189 memcpy(&rbuf[32], "n/a ", 4); 2190 2191 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 2192 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2193 else 2194 memcpy(rbuf + 58, versions, sizeof(versions)); 2195 2196 return 0; 2197 } 2198 2199 /** 2200 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2201 * @args: device IDENTIFY data / SCSI command of interest. 2202 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2203 * 2204 * Returns list of inquiry VPD pages available. 2205 * 2206 * LOCKING: 2207 * spin_lock_irqsave(host lock) 2208 */ 2209 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 2210 { 2211 int num_pages; 2212 static const u8 pages[] = { 2213 0x00, /* page 0x00, this page */ 2214 0x80, /* page 0x80, unit serial no page */ 2215 0x83, /* page 0x83, device ident page */ 2216 0x89, /* page 0x89, ata info page */ 2217 0xb0, /* page 0xb0, block limits page */ 2218 0xb1, /* page 0xb1, block device characteristics page */ 2219 0xb2, /* page 0xb2, thin provisioning page */ 2220 0xb6, /* page 0xb6, zoned block device characteristics */ 2221 }; 2222 2223 num_pages = sizeof(pages); 2224 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 2225 num_pages--; 2226 rbuf[3] = num_pages; /* number of supported VPD pages */ 2227 memcpy(rbuf + 4, pages, num_pages); 2228 return 0; 2229 } 2230 2231 /** 2232 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2233 * @args: device IDENTIFY data / SCSI command of interest. 2234 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2235 * 2236 * Returns ATA device serial number. 2237 * 2238 * LOCKING: 2239 * spin_lock_irqsave(host lock) 2240 */ 2241 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2242 { 2243 static const u8 hdr[] = { 2244 0, 2245 0x80, /* this page code */ 2246 0, 2247 ATA_ID_SERNO_LEN, /* page len */ 2248 }; 2249 2250 memcpy(rbuf, hdr, sizeof(hdr)); 2251 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2252 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2253 return 0; 2254 } 2255 2256 /** 2257 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2258 * @args: device IDENTIFY data / SCSI command of interest. 2259 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2260 * 2261 * Yields two logical unit device identification designators: 2262 * - vendor specific ASCII containing the ATA serial number 2263 * - SAT defined "t10 vendor id based" containing ASCII vendor 2264 * name ("ATA "), model and serial numbers. 2265 * 2266 * LOCKING: 2267 * spin_lock_irqsave(host lock) 2268 */ 2269 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2270 { 2271 const int sat_model_serial_desc_len = 68; 2272 int num; 2273 2274 rbuf[1] = 0x83; /* this page code */ 2275 num = 4; 2276 2277 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2278 rbuf[num + 0] = 2; 2279 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2280 num += 4; 2281 ata_id_string(args->id, (unsigned char *) rbuf + num, 2282 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2283 num += ATA_ID_SERNO_LEN; 2284 2285 /* SAT defined lu model and serial numbers descriptor */ 2286 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2287 rbuf[num + 0] = 2; 2288 rbuf[num + 1] = 1; 2289 rbuf[num + 3] = sat_model_serial_desc_len; 2290 num += 4; 2291 memcpy(rbuf + num, "ATA ", 8); 2292 num += 8; 2293 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2294 ATA_ID_PROD_LEN); 2295 num += ATA_ID_PROD_LEN; 2296 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2297 ATA_ID_SERNO_LEN); 2298 num += ATA_ID_SERNO_LEN; 2299 2300 if (ata_id_has_wwn(args->id)) { 2301 /* SAT defined lu world wide name */ 2302 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2303 rbuf[num + 0] = 1; 2304 rbuf[num + 1] = 3; 2305 rbuf[num + 3] = ATA_ID_WWN_LEN; 2306 num += 4; 2307 ata_id_string(args->id, (unsigned char *) rbuf + num, 2308 ATA_ID_WWN, ATA_ID_WWN_LEN); 2309 num += ATA_ID_WWN_LEN; 2310 } 2311 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2312 return 0; 2313 } 2314 2315 /** 2316 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2317 * @args: device IDENTIFY data / SCSI command of interest. 2318 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2319 * 2320 * Yields SAT-specified ATA VPD page. 2321 * 2322 * LOCKING: 2323 * spin_lock_irqsave(host lock) 2324 */ 2325 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2326 { 2327 struct ata_taskfile tf; 2328 2329 memset(&tf, 0, sizeof(tf)); 2330 2331 rbuf[1] = 0x89; /* our page code */ 2332 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2333 rbuf[3] = (0x238 & 0xff); 2334 2335 memcpy(&rbuf[8], "linux ", 8); 2336 memcpy(&rbuf[16], "libata ", 16); 2337 memcpy(&rbuf[32], DRV_VERSION, 4); 2338 2339 /* we don't store the ATA device signature, so we fake it */ 2340 2341 tf.command = ATA_DRDY; /* really, this is Status reg */ 2342 tf.lbal = 0x1; 2343 tf.nsect = 0x1; 2344 2345 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2346 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2347 2348 rbuf[56] = ATA_CMD_ID_ATA; 2349 2350 memcpy(&rbuf[60], &args->id[0], 512); 2351 return 0; 2352 } 2353 2354 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2355 { 2356 u16 min_io_sectors; 2357 2358 rbuf[1] = 0xb0; 2359 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2360 2361 /* 2362 * Optimal transfer length granularity. 2363 * 2364 * This is always one physical block, but for disks with a smaller 2365 * logical than physical sector size we need to figure out what the 2366 * latter is. 2367 */ 2368 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2369 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2370 2371 /* 2372 * Optimal unmap granularity. 2373 * 2374 * The ATA spec doesn't even know about a granularity or alignment 2375 * for the TRIM command. We can leave away most of the unmap related 2376 * VPD page entries, but we have specifify a granularity to signal 2377 * that we support some form of unmap - in thise case via WRITE SAME 2378 * with the unmap bit set. 2379 */ 2380 if (ata_id_has_trim(args->id)) { 2381 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); 2382 put_unaligned_be32(1, &rbuf[28]); 2383 } 2384 2385 return 0; 2386 } 2387 2388 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2389 { 2390 int form_factor = ata_id_form_factor(args->id); 2391 int media_rotation_rate = ata_id_rotation_rate(args->id); 2392 u8 zoned = ata_id_zoned_cap(args->id); 2393 2394 rbuf[1] = 0xb1; 2395 rbuf[3] = 0x3c; 2396 rbuf[4] = media_rotation_rate >> 8; 2397 rbuf[5] = media_rotation_rate; 2398 rbuf[7] = form_factor; 2399 if (zoned) 2400 rbuf[8] = (zoned << 4); 2401 2402 return 0; 2403 } 2404 2405 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2406 { 2407 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2408 rbuf[1] = 0xb2; 2409 rbuf[3] = 0x4; 2410 rbuf[5] = 1 << 6; /* TPWS */ 2411 2412 return 0; 2413 } 2414 2415 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2416 { 2417 /* 2418 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2419 */ 2420 rbuf[1] = 0xb6; 2421 rbuf[3] = 0x3C; 2422 2423 /* 2424 * URSWRZ bit is only meaningful for host-managed ZAC drives 2425 */ 2426 if (args->dev->zac_zoned_cap & 1) 2427 rbuf[4] |= 1; 2428 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2429 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2430 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2431 2432 return 0; 2433 } 2434 2435 /** 2436 * modecpy - Prepare response for MODE SENSE 2437 * @dest: output buffer 2438 * @src: data being copied 2439 * @n: length of mode page 2440 * @changeable: whether changeable parameters are requested 2441 * 2442 * Generate a generic MODE SENSE page for either current or changeable 2443 * parameters. 2444 * 2445 * LOCKING: 2446 * None. 2447 */ 2448 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2449 { 2450 if (changeable) { 2451 memcpy(dest, src, 2); 2452 memset(dest + 2, 0, n - 2); 2453 } else { 2454 memcpy(dest, src, n); 2455 } 2456 } 2457 2458 /** 2459 * ata_msense_caching - Simulate MODE SENSE caching info page 2460 * @id: device IDENTIFY data 2461 * @buf: output buffer 2462 * @changeable: whether changeable parameters are requested 2463 * 2464 * Generate a caching info page, which conditionally indicates 2465 * write caching to the SCSI layer, depending on device 2466 * capabilities. 2467 * 2468 * LOCKING: 2469 * None. 2470 */ 2471 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2472 { 2473 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2474 if (changeable) { 2475 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2476 } else { 2477 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2478 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2479 } 2480 return sizeof(def_cache_mpage); 2481 } 2482 2483 /** 2484 * ata_msense_control - Simulate MODE SENSE control mode page 2485 * @dev: ATA device of interest 2486 * @buf: output buffer 2487 * @changeable: whether changeable parameters are requested 2488 * 2489 * Generate a generic MODE SENSE control mode page. 2490 * 2491 * LOCKING: 2492 * None. 2493 */ 2494 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2495 bool changeable) 2496 { 2497 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2498 if (changeable) { 2499 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2500 } else { 2501 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2502 2503 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2504 } 2505 return sizeof(def_control_mpage); 2506 } 2507 2508 /** 2509 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2510 * @buf: output buffer 2511 * @changeable: whether changeable parameters are requested 2512 * 2513 * Generate a generic MODE SENSE r/w error recovery page. 2514 * 2515 * LOCKING: 2516 * None. 2517 */ 2518 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2519 { 2520 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2521 changeable); 2522 return sizeof(def_rw_recovery_mpage); 2523 } 2524 2525 /* 2526 * We can turn this into a real blacklist if it's needed, for now just 2527 * blacklist any Maxtor BANC1G10 revision firmware 2528 */ 2529 static int ata_dev_supports_fua(u16 *id) 2530 { 2531 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2532 2533 if (!libata_fua) 2534 return 0; 2535 if (!ata_id_has_fua(id)) 2536 return 0; 2537 2538 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2539 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2540 2541 if (strcmp(model, "Maxtor")) 2542 return 1; 2543 if (strcmp(fw, "BANC1G10")) 2544 return 1; 2545 2546 return 0; /* blacklisted */ 2547 } 2548 2549 /** 2550 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2551 * @args: device IDENTIFY data / SCSI command of interest. 2552 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2553 * 2554 * Simulate MODE SENSE commands. Assume this is invoked for direct 2555 * access devices (e.g. disks) only. There should be no block 2556 * descriptor for other device types. 2557 * 2558 * LOCKING: 2559 * spin_lock_irqsave(host lock) 2560 */ 2561 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2562 { 2563 struct ata_device *dev = args->dev; 2564 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2565 static const u8 sat_blk_desc[] = { 2566 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2567 0, 2568 0, 0x2, 0x0 /* block length: 512 bytes */ 2569 }; 2570 u8 pg, spg; 2571 unsigned int ebd, page_control, six_byte; 2572 u8 dpofua, bp = 0xff; 2573 u16 fp; 2574 2575 VPRINTK("ENTER\n"); 2576 2577 six_byte = (scsicmd[0] == MODE_SENSE); 2578 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2579 /* 2580 * LLBA bit in msense(10) ignored (compliant) 2581 */ 2582 2583 page_control = scsicmd[2] >> 6; 2584 switch (page_control) { 2585 case 0: /* current */ 2586 case 1: /* changeable */ 2587 case 2: /* defaults */ 2588 break; /* supported */ 2589 case 3: /* saved */ 2590 goto saving_not_supp; 2591 default: 2592 fp = 2; 2593 bp = 6; 2594 goto invalid_fld; 2595 } 2596 2597 if (six_byte) 2598 p += 4 + (ebd ? 8 : 0); 2599 else 2600 p += 8 + (ebd ? 8 : 0); 2601 2602 pg = scsicmd[2] & 0x3f; 2603 spg = scsicmd[3]; 2604 /* 2605 * No mode subpages supported (yet) but asking for _all_ 2606 * subpages may be valid 2607 */ 2608 if (spg && (spg != ALL_SUB_MPAGES)) { 2609 fp = 3; 2610 goto invalid_fld; 2611 } 2612 2613 switch(pg) { 2614 case RW_RECOVERY_MPAGE: 2615 p += ata_msense_rw_recovery(p, page_control == 1); 2616 break; 2617 2618 case CACHE_MPAGE: 2619 p += ata_msense_caching(args->id, p, page_control == 1); 2620 break; 2621 2622 case CONTROL_MPAGE: 2623 p += ata_msense_control(args->dev, p, page_control == 1); 2624 break; 2625 2626 case ALL_MPAGES: 2627 p += ata_msense_rw_recovery(p, page_control == 1); 2628 p += ata_msense_caching(args->id, p, page_control == 1); 2629 p += ata_msense_control(args->dev, p, page_control == 1); 2630 break; 2631 2632 default: /* invalid page code */ 2633 fp = 2; 2634 goto invalid_fld; 2635 } 2636 2637 dpofua = 0; 2638 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2639 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2640 dpofua = 1 << 4; 2641 2642 if (six_byte) { 2643 rbuf[0] = p - rbuf - 1; 2644 rbuf[2] |= dpofua; 2645 if (ebd) { 2646 rbuf[3] = sizeof(sat_blk_desc); 2647 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2648 } 2649 } else { 2650 unsigned int output_len = p - rbuf - 2; 2651 2652 rbuf[0] = output_len >> 8; 2653 rbuf[1] = output_len; 2654 rbuf[3] |= dpofua; 2655 if (ebd) { 2656 rbuf[7] = sizeof(sat_blk_desc); 2657 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2658 } 2659 } 2660 return 0; 2661 2662 invalid_fld: 2663 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2664 return 1; 2665 2666 saving_not_supp: 2667 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2668 /* "Saving parameters not supported" */ 2669 return 1; 2670 } 2671 2672 /** 2673 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2674 * @args: device IDENTIFY data / SCSI command of interest. 2675 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2676 * 2677 * Simulate READ CAPACITY commands. 2678 * 2679 * LOCKING: 2680 * None. 2681 */ 2682 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2683 { 2684 struct ata_device *dev = args->dev; 2685 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2686 u32 sector_size; /* physical sector size in bytes */ 2687 u8 log2_per_phys; 2688 u16 lowest_aligned; 2689 2690 sector_size = ata_id_logical_sector_size(dev->id); 2691 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2692 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2693 2694 VPRINTK("ENTER\n"); 2695 2696 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2697 if (last_lba >= 0xffffffffULL) 2698 last_lba = 0xffffffff; 2699 2700 /* sector count, 32-bit */ 2701 rbuf[0] = last_lba >> (8 * 3); 2702 rbuf[1] = last_lba >> (8 * 2); 2703 rbuf[2] = last_lba >> (8 * 1); 2704 rbuf[3] = last_lba; 2705 2706 /* sector size */ 2707 rbuf[4] = sector_size >> (8 * 3); 2708 rbuf[5] = sector_size >> (8 * 2); 2709 rbuf[6] = sector_size >> (8 * 1); 2710 rbuf[7] = sector_size; 2711 } else { 2712 /* sector count, 64-bit */ 2713 rbuf[0] = last_lba >> (8 * 7); 2714 rbuf[1] = last_lba >> (8 * 6); 2715 rbuf[2] = last_lba >> (8 * 5); 2716 rbuf[3] = last_lba >> (8 * 4); 2717 rbuf[4] = last_lba >> (8 * 3); 2718 rbuf[5] = last_lba >> (8 * 2); 2719 rbuf[6] = last_lba >> (8 * 1); 2720 rbuf[7] = last_lba; 2721 2722 /* sector size */ 2723 rbuf[ 8] = sector_size >> (8 * 3); 2724 rbuf[ 9] = sector_size >> (8 * 2); 2725 rbuf[10] = sector_size >> (8 * 1); 2726 rbuf[11] = sector_size; 2727 2728 rbuf[12] = 0; 2729 rbuf[13] = log2_per_phys; 2730 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2731 rbuf[15] = lowest_aligned; 2732 2733 if (ata_id_has_trim(args->id) && 2734 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2735 rbuf[14] |= 0x80; /* LBPME */ 2736 2737 if (ata_id_has_zero_after_trim(args->id) && 2738 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2739 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2740 rbuf[14] |= 0x40; /* LBPRZ */ 2741 } 2742 } 2743 if (ata_id_zoned_cap(args->id) || 2744 args->dev->class == ATA_DEV_ZAC) 2745 rbuf[12] = (1 << 4); /* RC_BASIS */ 2746 } 2747 return 0; 2748 } 2749 2750 /** 2751 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2752 * @args: device IDENTIFY data / SCSI command of interest. 2753 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2754 * 2755 * Simulate REPORT LUNS command. 2756 * 2757 * LOCKING: 2758 * spin_lock_irqsave(host lock) 2759 */ 2760 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2761 { 2762 VPRINTK("ENTER\n"); 2763 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2764 2765 return 0; 2766 } 2767 2768 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2769 { 2770 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2771 /* FIXME: not quite right; we don't want the 2772 * translation of taskfile registers into 2773 * a sense descriptors, since that's only 2774 * correct for ATA, not ATAPI 2775 */ 2776 ata_gen_passthru_sense(qc); 2777 } 2778 2779 ata_qc_done(qc); 2780 } 2781 2782 /* is it pointless to prefer PIO for "safety reasons"? */ 2783 static inline int ata_pio_use_silly(struct ata_port *ap) 2784 { 2785 return (ap->flags & ATA_FLAG_PIO_DMA); 2786 } 2787 2788 static void atapi_request_sense(struct ata_queued_cmd *qc) 2789 { 2790 struct ata_port *ap = qc->ap; 2791 struct scsi_cmnd *cmd = qc->scsicmd; 2792 2793 DPRINTK("ATAPI request sense\n"); 2794 2795 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2796 2797 #ifdef CONFIG_ATA_SFF 2798 if (ap->ops->sff_tf_read) 2799 ap->ops->sff_tf_read(ap, &qc->tf); 2800 #endif 2801 2802 /* fill these in, for the case where they are -not- overwritten */ 2803 cmd->sense_buffer[0] = 0x70; 2804 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2805 2806 ata_qc_reinit(qc); 2807 2808 /* setup sg table and init transfer direction */ 2809 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2810 ata_sg_init(qc, &qc->sgent, 1); 2811 qc->dma_dir = DMA_FROM_DEVICE; 2812 2813 memset(&qc->cdb, 0, qc->dev->cdb_len); 2814 qc->cdb[0] = REQUEST_SENSE; 2815 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2816 2817 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2818 qc->tf.command = ATA_CMD_PACKET; 2819 2820 if (ata_pio_use_silly(ap)) { 2821 qc->tf.protocol = ATAPI_PROT_DMA; 2822 qc->tf.feature |= ATAPI_PKT_DMA; 2823 } else { 2824 qc->tf.protocol = ATAPI_PROT_PIO; 2825 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2826 qc->tf.lbah = 0; 2827 } 2828 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2829 2830 qc->complete_fn = atapi_sense_complete; 2831 2832 ata_qc_issue(qc); 2833 2834 DPRINTK("EXIT\n"); 2835 } 2836 2837 /* 2838 * ATAPI devices typically report zero for their SCSI version, and sometimes 2839 * deviate from the spec WRT response data format. If SCSI version is 2840 * reported as zero like normal, then we make the following fixups: 2841 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2842 * modern device. 2843 * 2) Ensure response data format / ATAPI information are always correct. 2844 */ 2845 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2846 { 2847 u8 buf[4]; 2848 2849 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2850 if (buf[2] == 0) { 2851 buf[2] = 0x5; 2852 buf[3] = 0x32; 2853 } 2854 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2855 } 2856 2857 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2858 { 2859 struct scsi_cmnd *cmd = qc->scsicmd; 2860 unsigned int err_mask = qc->err_mask; 2861 2862 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2863 2864 /* handle completion from new EH */ 2865 if (unlikely(qc->ap->ops->error_handler && 2866 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2867 2868 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2869 /* FIXME: not quite right; we don't want the 2870 * translation of taskfile registers into a 2871 * sense descriptors, since that's only 2872 * correct for ATA, not ATAPI 2873 */ 2874 ata_gen_passthru_sense(qc); 2875 } 2876 2877 /* SCSI EH automatically locks door if sdev->locked is 2878 * set. Sometimes door lock request continues to 2879 * fail, for example, when no media is present. This 2880 * creates a loop - SCSI EH issues door lock which 2881 * fails and gets invoked again to acquire sense data 2882 * for the failed command. 2883 * 2884 * If door lock fails, always clear sdev->locked to 2885 * avoid this infinite loop. 2886 * 2887 * This may happen before SCSI scan is complete. Make 2888 * sure qc->dev->sdev isn't NULL before dereferencing. 2889 */ 2890 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2891 qc->dev->sdev->locked = 0; 2892 2893 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2894 ata_qc_done(qc); 2895 return; 2896 } 2897 2898 /* successful completion or old EH failure path */ 2899 if (unlikely(err_mask & AC_ERR_DEV)) { 2900 cmd->result = SAM_STAT_CHECK_CONDITION; 2901 atapi_request_sense(qc); 2902 return; 2903 } else if (unlikely(err_mask)) { 2904 /* FIXME: not quite right; we don't want the 2905 * translation of taskfile registers into 2906 * a sense descriptors, since that's only 2907 * correct for ATA, not ATAPI 2908 */ 2909 ata_gen_passthru_sense(qc); 2910 } else { 2911 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2912 atapi_fixup_inquiry(cmd); 2913 cmd->result = SAM_STAT_GOOD; 2914 } 2915 2916 ata_qc_done(qc); 2917 } 2918 /** 2919 * atapi_xlat - Initialize PACKET taskfile 2920 * @qc: command structure to be initialized 2921 * 2922 * LOCKING: 2923 * spin_lock_irqsave(host lock) 2924 * 2925 * RETURNS: 2926 * Zero on success, non-zero on failure. 2927 */ 2928 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2929 { 2930 struct scsi_cmnd *scmd = qc->scsicmd; 2931 struct ata_device *dev = qc->dev; 2932 int nodata = (scmd->sc_data_direction == DMA_NONE); 2933 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2934 unsigned int nbytes; 2935 2936 memset(qc->cdb, 0, dev->cdb_len); 2937 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2938 2939 qc->complete_fn = atapi_qc_complete; 2940 2941 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2942 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2943 qc->tf.flags |= ATA_TFLAG_WRITE; 2944 DPRINTK("direction: write\n"); 2945 } 2946 2947 qc->tf.command = ATA_CMD_PACKET; 2948 ata_qc_set_pc_nbytes(qc); 2949 2950 /* check whether ATAPI DMA is safe */ 2951 if (!nodata && !using_pio && atapi_check_dma(qc)) 2952 using_pio = 1; 2953 2954 /* Some controller variants snoop this value for Packet 2955 * transfers to do state machine and FIFO management. Thus we 2956 * want to set it properly, and for DMA where it is 2957 * effectively meaningless. 2958 */ 2959 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2960 2961 /* Most ATAPI devices which honor transfer chunk size don't 2962 * behave according to the spec when odd chunk size which 2963 * matches the transfer length is specified. If the number of 2964 * bytes to transfer is 2n+1. According to the spec, what 2965 * should happen is to indicate that 2n+1 is going to be 2966 * transferred and transfer 2n+2 bytes where the last byte is 2967 * padding. 2968 * 2969 * In practice, this doesn't happen. ATAPI devices first 2970 * indicate and transfer 2n bytes and then indicate and 2971 * transfer 2 bytes where the last byte is padding. 2972 * 2973 * This inconsistency confuses several controllers which 2974 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2975 * These controllers use actual number of transferred bytes to 2976 * update DMA pointer and transfer of 4n+2 bytes make those 2977 * controller push DMA pointer by 4n+4 bytes because SATA data 2978 * FISes are aligned to 4 bytes. This causes data corruption 2979 * and buffer overrun. 2980 * 2981 * Always setting nbytes to even number solves this problem 2982 * because then ATAPI devices don't have to split data at 2n 2983 * boundaries. 2984 */ 2985 if (nbytes & 0x1) 2986 nbytes++; 2987 2988 qc->tf.lbam = (nbytes & 0xFF); 2989 qc->tf.lbah = (nbytes >> 8); 2990 2991 if (nodata) 2992 qc->tf.protocol = ATAPI_PROT_NODATA; 2993 else if (using_pio) 2994 qc->tf.protocol = ATAPI_PROT_PIO; 2995 else { 2996 /* DMA data xfer */ 2997 qc->tf.protocol = ATAPI_PROT_DMA; 2998 qc->tf.feature |= ATAPI_PKT_DMA; 2999 3000 if ((dev->flags & ATA_DFLAG_DMADIR) && 3001 (scmd->sc_data_direction != DMA_TO_DEVICE)) 3002 /* some SATA bridges need us to indicate data xfer direction */ 3003 qc->tf.feature |= ATAPI_DMADIR; 3004 } 3005 3006 3007 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 3008 as ATAPI tape drives don't get this right otherwise */ 3009 return 0; 3010 } 3011 3012 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 3013 { 3014 if (!sata_pmp_attached(ap)) { 3015 if (likely(devno >= 0 && 3016 devno < ata_link_max_devices(&ap->link))) 3017 return &ap->link.device[devno]; 3018 } else { 3019 if (likely(devno >= 0 && 3020 devno < ap->nr_pmp_links)) 3021 return &ap->pmp_link[devno].device[0]; 3022 } 3023 3024 return NULL; 3025 } 3026 3027 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 3028 const struct scsi_device *scsidev) 3029 { 3030 int devno; 3031 3032 /* skip commands not addressed to targets we simulate */ 3033 if (!sata_pmp_attached(ap)) { 3034 if (unlikely(scsidev->channel || scsidev->lun)) 3035 return NULL; 3036 devno = scsidev->id; 3037 } else { 3038 if (unlikely(scsidev->id || scsidev->lun)) 3039 return NULL; 3040 devno = scsidev->channel; 3041 } 3042 3043 return ata_find_dev(ap, devno); 3044 } 3045 3046 /** 3047 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3048 * @ap: ATA port to which the device is attached 3049 * @scsidev: SCSI device from which we derive the ATA device 3050 * 3051 * Given various information provided in struct scsi_cmnd, 3052 * map that onto an ATA bus, and using that mapping 3053 * determine which ata_device is associated with the 3054 * SCSI command to be sent. 3055 * 3056 * LOCKING: 3057 * spin_lock_irqsave(host lock) 3058 * 3059 * RETURNS: 3060 * Associated ATA device, or %NULL if not found. 3061 */ 3062 static struct ata_device * 3063 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3064 { 3065 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3066 3067 if (unlikely(!dev || !ata_dev_enabled(dev))) 3068 return NULL; 3069 3070 return dev; 3071 } 3072 3073 /* 3074 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3075 * @byte1: Byte 1 from pass-thru CDB. 3076 * 3077 * RETURNS: 3078 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3079 */ 3080 static u8 3081 ata_scsi_map_proto(u8 byte1) 3082 { 3083 switch((byte1 & 0x1e) >> 1) { 3084 case 3: /* Non-data */ 3085 return ATA_PROT_NODATA; 3086 3087 case 6: /* DMA */ 3088 case 10: /* UDMA Data-in */ 3089 case 11: /* UDMA Data-Out */ 3090 return ATA_PROT_DMA; 3091 3092 case 4: /* PIO Data-in */ 3093 case 5: /* PIO Data-out */ 3094 return ATA_PROT_PIO; 3095 3096 case 12: /* FPDMA */ 3097 return ATA_PROT_NCQ; 3098 3099 case 0: /* Hard Reset */ 3100 case 1: /* SRST */ 3101 case 8: /* Device Diagnostic */ 3102 case 9: /* Device Reset */ 3103 case 7: /* DMA Queued */ 3104 case 15: /* Return Response Info */ 3105 default: /* Reserved */ 3106 break; 3107 } 3108 3109 return ATA_PROT_UNKNOWN; 3110 } 3111 3112 /** 3113 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3114 * @qc: command structure to be initialized 3115 * 3116 * Handles either 12, 16, or 32-byte versions of the CDB. 3117 * 3118 * RETURNS: 3119 * Zero on success, non-zero on failure. 3120 */ 3121 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3122 { 3123 struct ata_taskfile *tf = &(qc->tf); 3124 struct scsi_cmnd *scmd = qc->scsicmd; 3125 struct ata_device *dev = qc->dev; 3126 const u8 *cdb = scmd->cmnd; 3127 u16 fp; 3128 u16 cdb_offset = 0; 3129 3130 /* 7Fh variable length cmd means a ata pass-thru(32) */ 3131 if (cdb[0] == VARIABLE_LENGTH_CMD) 3132 cdb_offset = 9; 3133 3134 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 3135 if (tf->protocol == ATA_PROT_UNKNOWN) { 3136 fp = 1; 3137 goto invalid_fld; 3138 } 3139 3140 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0) 3141 tf->protocol = ATA_PROT_NCQ_NODATA; 3142 3143 /* enable LBA */ 3144 tf->flags |= ATA_TFLAG_LBA; 3145 3146 /* 3147 * 12 and 16 byte CDBs use different offsets to 3148 * provide the various register values. 3149 */ 3150 if (cdb[0] == ATA_16) { 3151 /* 3152 * 16-byte CDB - may contain extended commands. 3153 * 3154 * If that is the case, copy the upper byte register values. 3155 */ 3156 if (cdb[1] & 0x01) { 3157 tf->hob_feature = cdb[3]; 3158 tf->hob_nsect = cdb[5]; 3159 tf->hob_lbal = cdb[7]; 3160 tf->hob_lbam = cdb[9]; 3161 tf->hob_lbah = cdb[11]; 3162 tf->flags |= ATA_TFLAG_LBA48; 3163 } else 3164 tf->flags &= ~ATA_TFLAG_LBA48; 3165 3166 /* 3167 * Always copy low byte, device and command registers. 3168 */ 3169 tf->feature = cdb[4]; 3170 tf->nsect = cdb[6]; 3171 tf->lbal = cdb[8]; 3172 tf->lbam = cdb[10]; 3173 tf->lbah = cdb[12]; 3174 tf->device = cdb[13]; 3175 tf->command = cdb[14]; 3176 } else if (cdb[0] == ATA_12) { 3177 /* 3178 * 12-byte CDB - incapable of extended commands. 3179 */ 3180 tf->flags &= ~ATA_TFLAG_LBA48; 3181 3182 tf->feature = cdb[3]; 3183 tf->nsect = cdb[4]; 3184 tf->lbal = cdb[5]; 3185 tf->lbam = cdb[6]; 3186 tf->lbah = cdb[7]; 3187 tf->device = cdb[8]; 3188 tf->command = cdb[9]; 3189 } else { 3190 /* 3191 * 32-byte CDB - may contain extended command fields. 3192 * 3193 * If that is the case, copy the upper byte register values. 3194 */ 3195 if (cdb[10] & 0x01) { 3196 tf->hob_feature = cdb[20]; 3197 tf->hob_nsect = cdb[22]; 3198 tf->hob_lbal = cdb[16]; 3199 tf->hob_lbam = cdb[15]; 3200 tf->hob_lbah = cdb[14]; 3201 tf->flags |= ATA_TFLAG_LBA48; 3202 } else 3203 tf->flags &= ~ATA_TFLAG_LBA48; 3204 3205 tf->feature = cdb[21]; 3206 tf->nsect = cdb[23]; 3207 tf->lbal = cdb[19]; 3208 tf->lbam = cdb[18]; 3209 tf->lbah = cdb[17]; 3210 tf->device = cdb[24]; 3211 tf->command = cdb[25]; 3212 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3213 } 3214 3215 /* For NCQ commands copy the tag value */ 3216 if (ata_is_ncq(tf->protocol)) 3217 tf->nsect = qc->hw_tag << 3; 3218 3219 /* enforce correct master/slave bit */ 3220 tf->device = dev->devno ? 3221 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3222 3223 switch (tf->command) { 3224 /* READ/WRITE LONG use a non-standard sect_size */ 3225 case ATA_CMD_READ_LONG: 3226 case ATA_CMD_READ_LONG_ONCE: 3227 case ATA_CMD_WRITE_LONG: 3228 case ATA_CMD_WRITE_LONG_ONCE: 3229 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3230 fp = 1; 3231 goto invalid_fld; 3232 } 3233 qc->sect_size = scsi_bufflen(scmd); 3234 break; 3235 3236 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3237 case ATA_CMD_CFA_WRITE_NE: 3238 case ATA_CMD_CFA_TRANS_SECT: 3239 case ATA_CMD_CFA_WRITE_MULT_NE: 3240 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3241 case ATA_CMD_READ: 3242 case ATA_CMD_READ_EXT: 3243 case ATA_CMD_READ_QUEUED: 3244 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3245 case ATA_CMD_FPDMA_READ: 3246 case ATA_CMD_READ_MULTI: 3247 case ATA_CMD_READ_MULTI_EXT: 3248 case ATA_CMD_PIO_READ: 3249 case ATA_CMD_PIO_READ_EXT: 3250 case ATA_CMD_READ_STREAM_DMA_EXT: 3251 case ATA_CMD_READ_STREAM_EXT: 3252 case ATA_CMD_VERIFY: 3253 case ATA_CMD_VERIFY_EXT: 3254 case ATA_CMD_WRITE: 3255 case ATA_CMD_WRITE_EXT: 3256 case ATA_CMD_WRITE_FUA_EXT: 3257 case ATA_CMD_WRITE_QUEUED: 3258 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3259 case ATA_CMD_FPDMA_WRITE: 3260 case ATA_CMD_WRITE_MULTI: 3261 case ATA_CMD_WRITE_MULTI_EXT: 3262 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3263 case ATA_CMD_PIO_WRITE: 3264 case ATA_CMD_PIO_WRITE_EXT: 3265 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3266 case ATA_CMD_WRITE_STREAM_EXT: 3267 qc->sect_size = scmd->device->sector_size; 3268 break; 3269 3270 /* Everything else uses 512 byte "sectors" */ 3271 default: 3272 qc->sect_size = ATA_SECT_SIZE; 3273 } 3274 3275 /* 3276 * Set flags so that all registers will be written, pass on 3277 * write indication (used for PIO/DMA setup), result TF is 3278 * copied back and we don't whine too much about its failure. 3279 */ 3280 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3281 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3282 tf->flags |= ATA_TFLAG_WRITE; 3283 3284 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3285 3286 /* 3287 * Set transfer length. 3288 * 3289 * TODO: find out if we need to do more here to 3290 * cover scatter/gather case. 3291 */ 3292 ata_qc_set_pc_nbytes(qc); 3293 3294 /* We may not issue DMA commands if no DMA mode is set */ 3295 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3296 fp = 1; 3297 goto invalid_fld; 3298 } 3299 3300 /* We may not issue NCQ commands to devices not supporting NCQ */ 3301 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3302 fp = 1; 3303 goto invalid_fld; 3304 } 3305 3306 /* sanity check for pio multi commands */ 3307 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3308 fp = 1; 3309 goto invalid_fld; 3310 } 3311 3312 if (is_multi_taskfile(tf)) { 3313 unsigned int multi_count = 1 << (cdb[1] >> 5); 3314 3315 /* compare the passed through multi_count 3316 * with the cached multi_count of libata 3317 */ 3318 if (multi_count != dev->multi_count) 3319 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3320 multi_count); 3321 } 3322 3323 /* 3324 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3325 * SET_FEATURES - XFER MODE must be preceded/succeeded 3326 * by an update to hardware-specific registers for each 3327 * controller (i.e. the reason for ->set_piomode(), 3328 * ->set_dmamode(), and ->post_set_mode() hooks). 3329 */ 3330 if (tf->command == ATA_CMD_SET_FEATURES && 3331 tf->feature == SETFEATURES_XFER) { 3332 fp = (cdb[0] == ATA_16) ? 4 : 3; 3333 goto invalid_fld; 3334 } 3335 3336 /* 3337 * Filter TPM commands by default. These provide an 3338 * essentially uncontrolled encrypted "back door" between 3339 * applications and the disk. Set libata.allow_tpm=1 if you 3340 * have a real reason for wanting to use them. This ensures 3341 * that installed software cannot easily mess stuff up without 3342 * user intent. DVR type users will probably ship with this enabled 3343 * for movie content management. 3344 * 3345 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3346 * for this and should do in future but that it is not sufficient as 3347 * DCS is an optional feature set. Thus we also do the software filter 3348 * so that we comply with the TC consortium stated goal that the user 3349 * can turn off TC features of their system. 3350 */ 3351 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3352 fp = (cdb[0] == ATA_16) ? 14 : 9; 3353 goto invalid_fld; 3354 } 3355 3356 return 0; 3357 3358 invalid_fld: 3359 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3360 return 1; 3361 } 3362 3363 /** 3364 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3365 * @cmd: SCSI command being translated 3366 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3367 * @sector: Starting sector 3368 * @count: Total Range of request in logical sectors 3369 * 3370 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3371 * descriptor. 3372 * 3373 * Upto 64 entries of the format: 3374 * 63:48 Range Length 3375 * 47:0 LBA 3376 * 3377 * Range Length of 0 is ignored. 3378 * LBA's should be sorted order and not overlap. 3379 * 3380 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3381 * 3382 * Return: Number of bytes copied into sglist. 3383 */ 3384 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3385 u64 sector, u32 count) 3386 { 3387 struct scsi_device *sdp = cmd->device; 3388 size_t len = sdp->sector_size; 3389 size_t r; 3390 __le64 *buf; 3391 u32 i = 0; 3392 unsigned long flags; 3393 3394 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3395 3396 if (len > ATA_SCSI_RBUF_SIZE) 3397 len = ATA_SCSI_RBUF_SIZE; 3398 3399 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3400 buf = ((void *)ata_scsi_rbuf); 3401 memset(buf, 0, len); 3402 while (i < trmax) { 3403 u64 entry = sector | 3404 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3405 buf[i++] = __cpu_to_le64(entry); 3406 if (count <= 0xffff) 3407 break; 3408 count -= 0xffff; 3409 sector += 0xffff; 3410 } 3411 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3412 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3413 3414 return r; 3415 } 3416 3417 /** 3418 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3419 * @qc: Command to be translated 3420 * 3421 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3422 * an SCT Write Same command. 3423 * Based on WRITE SAME has the UNMAP flag: 3424 * 3425 * - When set translate to DSM TRIM 3426 * - When clear translate to SCT Write Same 3427 */ 3428 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3429 { 3430 struct ata_taskfile *tf = &qc->tf; 3431 struct scsi_cmnd *scmd = qc->scsicmd; 3432 struct scsi_device *sdp = scmd->device; 3433 size_t len = sdp->sector_size; 3434 struct ata_device *dev = qc->dev; 3435 const u8 *cdb = scmd->cmnd; 3436 u64 block; 3437 u32 n_block; 3438 const u32 trmax = len >> 3; 3439 u32 size; 3440 u16 fp; 3441 u8 bp = 0xff; 3442 u8 unmap = cdb[1] & 0x8; 3443 3444 /* we may not issue DMA commands if no DMA mode is set */ 3445 if (unlikely(!dev->dma_mode)) 3446 goto invalid_opcode; 3447 3448 /* 3449 * We only allow sending this command through the block layer, 3450 * as it modifies the DATA OUT buffer, which would corrupt user 3451 * memory for SG_IO commands. 3452 */ 3453 if (unlikely(blk_rq_is_passthrough(scmd->request))) 3454 goto invalid_opcode; 3455 3456 if (unlikely(scmd->cmd_len < 16)) { 3457 fp = 15; 3458 goto invalid_fld; 3459 } 3460 scsi_16_lba_len(cdb, &block, &n_block); 3461 3462 if (!unmap || 3463 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3464 !ata_id_has_trim(dev->id)) { 3465 fp = 1; 3466 bp = 3; 3467 goto invalid_fld; 3468 } 3469 /* If the request is too large the cmd is invalid */ 3470 if (n_block > 0xffff * trmax) { 3471 fp = 2; 3472 goto invalid_fld; 3473 } 3474 3475 /* 3476 * WRITE SAME always has a sector sized buffer as payload, this 3477 * should never be a multiple entry S/G list. 3478 */ 3479 if (!scsi_sg_count(scmd)) 3480 goto invalid_param_len; 3481 3482 /* 3483 * size must match sector size in bytes 3484 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3485 * is defined as number of 512 byte blocks to be transferred. 3486 */ 3487 3488 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3489 if (size != len) 3490 goto invalid_param_len; 3491 3492 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3493 /* Newer devices support queued TRIM commands */ 3494 tf->protocol = ATA_PROT_NCQ; 3495 tf->command = ATA_CMD_FPDMA_SEND; 3496 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3497 tf->nsect = qc->hw_tag << 3; 3498 tf->hob_feature = (size / 512) >> 8; 3499 tf->feature = size / 512; 3500 3501 tf->auxiliary = 1; 3502 } else { 3503 tf->protocol = ATA_PROT_DMA; 3504 tf->hob_feature = 0; 3505 tf->feature = ATA_DSM_TRIM; 3506 tf->hob_nsect = (size / 512) >> 8; 3507 tf->nsect = size / 512; 3508 tf->command = ATA_CMD_DSM; 3509 } 3510 3511 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3512 ATA_TFLAG_WRITE; 3513 3514 ata_qc_set_pc_nbytes(qc); 3515 3516 return 0; 3517 3518 invalid_fld: 3519 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3520 return 1; 3521 invalid_param_len: 3522 /* "Parameter list length error" */ 3523 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3524 return 1; 3525 invalid_opcode: 3526 /* "Invalid command operation code" */ 3527 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3528 return 1; 3529 } 3530 3531 /** 3532 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3533 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3534 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3535 * 3536 * Yields a subset to satisfy scsi_report_opcode() 3537 * 3538 * LOCKING: 3539 * spin_lock_irqsave(host lock) 3540 */ 3541 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3542 { 3543 struct ata_device *dev = args->dev; 3544 u8 *cdb = args->cmd->cmnd; 3545 u8 supported = 0; 3546 unsigned int err = 0; 3547 3548 if (cdb[2] != 1) { 3549 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3550 err = 2; 3551 goto out; 3552 } 3553 switch (cdb[3]) { 3554 case INQUIRY: 3555 case MODE_SENSE: 3556 case MODE_SENSE_10: 3557 case READ_CAPACITY: 3558 case SERVICE_ACTION_IN_16: 3559 case REPORT_LUNS: 3560 case REQUEST_SENSE: 3561 case SYNCHRONIZE_CACHE: 3562 case REZERO_UNIT: 3563 case SEEK_6: 3564 case SEEK_10: 3565 case TEST_UNIT_READY: 3566 case SEND_DIAGNOSTIC: 3567 case MAINTENANCE_IN: 3568 case READ_6: 3569 case READ_10: 3570 case READ_16: 3571 case WRITE_6: 3572 case WRITE_10: 3573 case WRITE_16: 3574 case ATA_12: 3575 case ATA_16: 3576 case VERIFY: 3577 case VERIFY_16: 3578 case MODE_SELECT: 3579 case MODE_SELECT_10: 3580 case START_STOP: 3581 supported = 3; 3582 break; 3583 case ZBC_IN: 3584 case ZBC_OUT: 3585 if (ata_id_zoned_cap(dev->id) || 3586 dev->class == ATA_DEV_ZAC) 3587 supported = 3; 3588 break; 3589 case SECURITY_PROTOCOL_IN: 3590 case SECURITY_PROTOCOL_OUT: 3591 if (dev->flags & ATA_DFLAG_TRUSTED) 3592 supported = 3; 3593 break; 3594 default: 3595 break; 3596 } 3597 out: 3598 rbuf[1] = supported; /* supported */ 3599 return err; 3600 } 3601 3602 /** 3603 * ata_scsi_report_zones_complete - convert ATA output 3604 * @qc: command structure returning the data 3605 * 3606 * Convert T-13 little-endian field representation into 3607 * T-10 big-endian field representation. 3608 * What a mess. 3609 */ 3610 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3611 { 3612 struct scsi_cmnd *scmd = qc->scsicmd; 3613 struct sg_mapping_iter miter; 3614 unsigned long flags; 3615 unsigned int bytes = 0; 3616 3617 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3618 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3619 3620 local_irq_save(flags); 3621 while (sg_miter_next(&miter)) { 3622 unsigned int offset = 0; 3623 3624 if (bytes == 0) { 3625 char *hdr; 3626 u32 list_length; 3627 u64 max_lba, opt_lba; 3628 u16 same; 3629 3630 /* Swizzle header */ 3631 hdr = miter.addr; 3632 list_length = get_unaligned_le32(&hdr[0]); 3633 same = get_unaligned_le16(&hdr[4]); 3634 max_lba = get_unaligned_le64(&hdr[8]); 3635 opt_lba = get_unaligned_le64(&hdr[16]); 3636 put_unaligned_be32(list_length, &hdr[0]); 3637 hdr[4] = same & 0xf; 3638 put_unaligned_be64(max_lba, &hdr[8]); 3639 put_unaligned_be64(opt_lba, &hdr[16]); 3640 offset += 64; 3641 bytes += 64; 3642 } 3643 while (offset < miter.length) { 3644 char *rec; 3645 u8 cond, type, non_seq, reset; 3646 u64 size, start, wp; 3647 3648 /* Swizzle zone descriptor */ 3649 rec = miter.addr + offset; 3650 type = rec[0] & 0xf; 3651 cond = (rec[1] >> 4) & 0xf; 3652 non_seq = (rec[1] & 2); 3653 reset = (rec[1] & 1); 3654 size = get_unaligned_le64(&rec[8]); 3655 start = get_unaligned_le64(&rec[16]); 3656 wp = get_unaligned_le64(&rec[24]); 3657 rec[0] = type; 3658 rec[1] = (cond << 4) | non_seq | reset; 3659 put_unaligned_be64(size, &rec[8]); 3660 put_unaligned_be64(start, &rec[16]); 3661 put_unaligned_be64(wp, &rec[24]); 3662 WARN_ON(offset + 64 > miter.length); 3663 offset += 64; 3664 bytes += 64; 3665 } 3666 } 3667 sg_miter_stop(&miter); 3668 local_irq_restore(flags); 3669 3670 ata_scsi_qc_complete(qc); 3671 } 3672 3673 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3674 { 3675 struct ata_taskfile *tf = &qc->tf; 3676 struct scsi_cmnd *scmd = qc->scsicmd; 3677 const u8 *cdb = scmd->cmnd; 3678 u16 sect, fp = (u16)-1; 3679 u8 sa, options, bp = 0xff; 3680 u64 block; 3681 u32 n_block; 3682 3683 if (unlikely(scmd->cmd_len < 16)) { 3684 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3685 scmd->cmd_len); 3686 fp = 15; 3687 goto invalid_fld; 3688 } 3689 scsi_16_lba_len(cdb, &block, &n_block); 3690 if (n_block != scsi_bufflen(scmd)) { 3691 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3692 n_block, scsi_bufflen(scmd)); 3693 goto invalid_param_len; 3694 } 3695 sa = cdb[1] & 0x1f; 3696 if (sa != ZI_REPORT_ZONES) { 3697 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3698 fp = 1; 3699 goto invalid_fld; 3700 } 3701 /* 3702 * ZAC allows only for transfers in 512 byte blocks, 3703 * and uses a 16 bit value for the transfer count. 3704 */ 3705 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3706 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3707 goto invalid_param_len; 3708 } 3709 sect = n_block / 512; 3710 options = cdb[14] & 0xbf; 3711 3712 if (ata_ncq_enabled(qc->dev) && 3713 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3714 tf->protocol = ATA_PROT_NCQ; 3715 tf->command = ATA_CMD_FPDMA_RECV; 3716 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3717 tf->nsect = qc->hw_tag << 3; 3718 tf->feature = sect & 0xff; 3719 tf->hob_feature = (sect >> 8) & 0xff; 3720 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3721 } else { 3722 tf->command = ATA_CMD_ZAC_MGMT_IN; 3723 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3724 tf->protocol = ATA_PROT_DMA; 3725 tf->hob_feature = options; 3726 tf->hob_nsect = (sect >> 8) & 0xff; 3727 tf->nsect = sect & 0xff; 3728 } 3729 tf->device = ATA_LBA; 3730 tf->lbah = (block >> 16) & 0xff; 3731 tf->lbam = (block >> 8) & 0xff; 3732 tf->lbal = block & 0xff; 3733 tf->hob_lbah = (block >> 40) & 0xff; 3734 tf->hob_lbam = (block >> 32) & 0xff; 3735 tf->hob_lbal = (block >> 24) & 0xff; 3736 3737 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3738 qc->flags |= ATA_QCFLAG_RESULT_TF; 3739 3740 ata_qc_set_pc_nbytes(qc); 3741 3742 qc->complete_fn = ata_scsi_report_zones_complete; 3743 3744 return 0; 3745 3746 invalid_fld: 3747 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3748 return 1; 3749 3750 invalid_param_len: 3751 /* "Parameter list length error" */ 3752 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3753 return 1; 3754 } 3755 3756 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3757 { 3758 struct ata_taskfile *tf = &qc->tf; 3759 struct scsi_cmnd *scmd = qc->scsicmd; 3760 struct ata_device *dev = qc->dev; 3761 const u8 *cdb = scmd->cmnd; 3762 u8 all, sa; 3763 u64 block; 3764 u32 n_block; 3765 u16 fp = (u16)-1; 3766 3767 if (unlikely(scmd->cmd_len < 16)) { 3768 fp = 15; 3769 goto invalid_fld; 3770 } 3771 3772 sa = cdb[1] & 0x1f; 3773 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3774 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3775 fp = 1; 3776 goto invalid_fld; 3777 } 3778 3779 scsi_16_lba_len(cdb, &block, &n_block); 3780 if (n_block) { 3781 /* 3782 * ZAC MANAGEMENT OUT doesn't define any length 3783 */ 3784 goto invalid_param_len; 3785 } 3786 3787 all = cdb[14] & 0x1; 3788 if (all) { 3789 /* 3790 * Ignore the block address (zone ID) as defined by ZBC. 3791 */ 3792 block = 0; 3793 } else if (block >= dev->n_sectors) { 3794 /* 3795 * Block must be a valid zone ID (a zone start LBA). 3796 */ 3797 fp = 2; 3798 goto invalid_fld; 3799 } 3800 3801 if (ata_ncq_enabled(qc->dev) && 3802 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3803 tf->protocol = ATA_PROT_NCQ_NODATA; 3804 tf->command = ATA_CMD_NCQ_NON_DATA; 3805 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3806 tf->nsect = qc->hw_tag << 3; 3807 tf->auxiliary = sa | ((u16)all << 8); 3808 } else { 3809 tf->protocol = ATA_PROT_NODATA; 3810 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3811 tf->feature = sa; 3812 tf->hob_feature = all; 3813 } 3814 tf->lbah = (block >> 16) & 0xff; 3815 tf->lbam = (block >> 8) & 0xff; 3816 tf->lbal = block & 0xff; 3817 tf->hob_lbah = (block >> 40) & 0xff; 3818 tf->hob_lbam = (block >> 32) & 0xff; 3819 tf->hob_lbal = (block >> 24) & 0xff; 3820 tf->device = ATA_LBA; 3821 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3822 3823 return 0; 3824 3825 invalid_fld: 3826 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3827 return 1; 3828 invalid_param_len: 3829 /* "Parameter list length error" */ 3830 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3831 return 1; 3832 } 3833 3834 /** 3835 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3836 * @qc: Storage for translated ATA taskfile 3837 * @buf: input buffer 3838 * @len: number of valid bytes in the input buffer 3839 * @fp: out parameter for the failed field on error 3840 * 3841 * Prepare a taskfile to modify caching information for the device. 3842 * 3843 * LOCKING: 3844 * None. 3845 */ 3846 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3847 const u8 *buf, int len, u16 *fp) 3848 { 3849 struct ata_taskfile *tf = &qc->tf; 3850 struct ata_device *dev = qc->dev; 3851 u8 mpage[CACHE_MPAGE_LEN]; 3852 u8 wce; 3853 int i; 3854 3855 /* 3856 * The first two bytes of def_cache_mpage are a header, so offsets 3857 * in mpage are off by 2 compared to buf. Same for len. 3858 */ 3859 3860 if (len != CACHE_MPAGE_LEN - 2) { 3861 if (len < CACHE_MPAGE_LEN - 2) 3862 *fp = len; 3863 else 3864 *fp = CACHE_MPAGE_LEN - 2; 3865 return -EINVAL; 3866 } 3867 3868 wce = buf[0] & (1 << 2); 3869 3870 /* 3871 * Check that read-only bits are not modified. 3872 */ 3873 ata_msense_caching(dev->id, mpage, false); 3874 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3875 if (i == 0) 3876 continue; 3877 if (mpage[i + 2] != buf[i]) { 3878 *fp = i; 3879 return -EINVAL; 3880 } 3881 } 3882 3883 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3884 tf->protocol = ATA_PROT_NODATA; 3885 tf->nsect = 0; 3886 tf->command = ATA_CMD_SET_FEATURES; 3887 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3888 return 0; 3889 } 3890 3891 /** 3892 * ata_mselect_control - Simulate MODE SELECT for control page 3893 * @qc: Storage for translated ATA taskfile 3894 * @buf: input buffer 3895 * @len: number of valid bytes in the input buffer 3896 * @fp: out parameter for the failed field on error 3897 * 3898 * Prepare a taskfile to modify caching information for the device. 3899 * 3900 * LOCKING: 3901 * None. 3902 */ 3903 static int ata_mselect_control(struct ata_queued_cmd *qc, 3904 const u8 *buf, int len, u16 *fp) 3905 { 3906 struct ata_device *dev = qc->dev; 3907 u8 mpage[CONTROL_MPAGE_LEN]; 3908 u8 d_sense; 3909 int i; 3910 3911 /* 3912 * The first two bytes of def_control_mpage are a header, so offsets 3913 * in mpage are off by 2 compared to buf. Same for len. 3914 */ 3915 3916 if (len != CONTROL_MPAGE_LEN - 2) { 3917 if (len < CONTROL_MPAGE_LEN - 2) 3918 *fp = len; 3919 else 3920 *fp = CONTROL_MPAGE_LEN - 2; 3921 return -EINVAL; 3922 } 3923 3924 d_sense = buf[0] & (1 << 2); 3925 3926 /* 3927 * Check that read-only bits are not modified. 3928 */ 3929 ata_msense_control(dev, mpage, false); 3930 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3931 if (i == 0) 3932 continue; 3933 if (mpage[2 + i] != buf[i]) { 3934 *fp = i; 3935 return -EINVAL; 3936 } 3937 } 3938 if (d_sense & (1 << 2)) 3939 dev->flags |= ATA_DFLAG_D_SENSE; 3940 else 3941 dev->flags &= ~ATA_DFLAG_D_SENSE; 3942 return 0; 3943 } 3944 3945 /** 3946 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3947 * @qc: Storage for translated ATA taskfile 3948 * 3949 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3950 * Assume this is invoked for direct access devices (e.g. disks) only. 3951 * There should be no block descriptor for other device types. 3952 * 3953 * LOCKING: 3954 * spin_lock_irqsave(host lock) 3955 */ 3956 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3957 { 3958 struct scsi_cmnd *scmd = qc->scsicmd; 3959 const u8 *cdb = scmd->cmnd; 3960 const u8 *p; 3961 u8 pg, spg; 3962 unsigned six_byte, pg_len, hdr_len, bd_len; 3963 int len; 3964 u16 fp = (u16)-1; 3965 u8 bp = 0xff; 3966 3967 VPRINTK("ENTER\n"); 3968 3969 six_byte = (cdb[0] == MODE_SELECT); 3970 if (six_byte) { 3971 if (scmd->cmd_len < 5) { 3972 fp = 4; 3973 goto invalid_fld; 3974 } 3975 3976 len = cdb[4]; 3977 hdr_len = 4; 3978 } else { 3979 if (scmd->cmd_len < 9) { 3980 fp = 8; 3981 goto invalid_fld; 3982 } 3983 3984 len = (cdb[7] << 8) + cdb[8]; 3985 hdr_len = 8; 3986 } 3987 3988 /* We only support PF=1, SP=0. */ 3989 if ((cdb[1] & 0x11) != 0x10) { 3990 fp = 1; 3991 bp = (cdb[1] & 0x01) ? 1 : 5; 3992 goto invalid_fld; 3993 } 3994 3995 /* Test early for possible overrun. */ 3996 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3997 goto invalid_param_len; 3998 3999 p = page_address(sg_page(scsi_sglist(scmd))); 4000 4001 /* Move past header and block descriptors. */ 4002 if (len < hdr_len) 4003 goto invalid_param_len; 4004 4005 if (six_byte) 4006 bd_len = p[3]; 4007 else 4008 bd_len = (p[6] << 8) + p[7]; 4009 4010 len -= hdr_len; 4011 p += hdr_len; 4012 if (len < bd_len) 4013 goto invalid_param_len; 4014 if (bd_len != 0 && bd_len != 8) { 4015 fp = (six_byte) ? 3 : 6; 4016 fp += bd_len + hdr_len; 4017 goto invalid_param; 4018 } 4019 4020 len -= bd_len; 4021 p += bd_len; 4022 if (len == 0) 4023 goto skip; 4024 4025 /* Parse both possible formats for the mode page headers. */ 4026 pg = p[0] & 0x3f; 4027 if (p[0] & 0x40) { 4028 if (len < 4) 4029 goto invalid_param_len; 4030 4031 spg = p[1]; 4032 pg_len = (p[2] << 8) | p[3]; 4033 p += 4; 4034 len -= 4; 4035 } else { 4036 if (len < 2) 4037 goto invalid_param_len; 4038 4039 spg = 0; 4040 pg_len = p[1]; 4041 p += 2; 4042 len -= 2; 4043 } 4044 4045 /* 4046 * No mode subpages supported (yet) but asking for _all_ 4047 * subpages may be valid 4048 */ 4049 if (spg && (spg != ALL_SUB_MPAGES)) { 4050 fp = (p[0] & 0x40) ? 1 : 0; 4051 fp += hdr_len + bd_len; 4052 goto invalid_param; 4053 } 4054 if (pg_len > len) 4055 goto invalid_param_len; 4056 4057 switch (pg) { 4058 case CACHE_MPAGE: 4059 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4060 fp += hdr_len + bd_len; 4061 goto invalid_param; 4062 } 4063 break; 4064 case CONTROL_MPAGE: 4065 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 4066 fp += hdr_len + bd_len; 4067 goto invalid_param; 4068 } else { 4069 goto skip; /* No ATA command to send */ 4070 } 4071 break; 4072 default: /* invalid page code */ 4073 fp = bd_len + hdr_len; 4074 goto invalid_param; 4075 } 4076 4077 /* 4078 * Only one page has changeable data, so we only support setting one 4079 * page at a time. 4080 */ 4081 if (len > pg_len) 4082 goto invalid_param; 4083 4084 return 0; 4085 4086 invalid_fld: 4087 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4088 return 1; 4089 4090 invalid_param: 4091 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4092 return 1; 4093 4094 invalid_param_len: 4095 /* "Parameter list length error" */ 4096 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4097 return 1; 4098 4099 skip: 4100 scmd->result = SAM_STAT_GOOD; 4101 return 1; 4102 } 4103 4104 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4105 { 4106 if (len == 0) 4107 return ATA_CMD_TRUSTED_NONDATA; 4108 else if (send) 4109 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4110 else 4111 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4112 } 4113 4114 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4115 { 4116 struct scsi_cmnd *scmd = qc->scsicmd; 4117 const u8 *cdb = scmd->cmnd; 4118 struct ata_taskfile *tf = &qc->tf; 4119 u8 secp = cdb[1]; 4120 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4121 u16 spsp = get_unaligned_be16(&cdb[2]); 4122 u32 len = get_unaligned_be32(&cdb[6]); 4123 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4124 4125 /* 4126 * We don't support the ATA "security" protocol. 4127 */ 4128 if (secp == 0xef) { 4129 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4130 return 1; 4131 } 4132 4133 if (cdb[4] & 7) { /* INC_512 */ 4134 if (len > 0xffff) { 4135 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4136 return 1; 4137 } 4138 } else { 4139 if (len > 0x01fffe00) { 4140 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4141 return 1; 4142 } 4143 4144 /* convert to the sector-based ATA addressing */ 4145 len = (len + 511) / 512; 4146 } 4147 4148 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4149 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4150 if (send) 4151 tf->flags |= ATA_TFLAG_WRITE; 4152 tf->command = ata_scsi_trusted_op(len, send, dma); 4153 tf->feature = secp; 4154 tf->lbam = spsp & 0xff; 4155 tf->lbah = spsp >> 8; 4156 4157 if (len) { 4158 tf->nsect = len & 0xff; 4159 tf->lbal = len >> 8; 4160 } else { 4161 if (!send) 4162 tf->lbah = (1 << 7); 4163 } 4164 4165 ata_qc_set_pc_nbytes(qc); 4166 return 0; 4167 } 4168 4169 /** 4170 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4171 * @qc: Command to be translated 4172 * 4173 * Translate a SCSI variable length CDB to specified commands. 4174 * It checks a service action value in CDB to call corresponding handler. 4175 * 4176 * RETURNS: 4177 * Zero on success, non-zero on failure 4178 * 4179 */ 4180 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4181 { 4182 struct scsi_cmnd *scmd = qc->scsicmd; 4183 const u8 *cdb = scmd->cmnd; 4184 const u16 sa = get_unaligned_be16(&cdb[8]); 4185 4186 /* 4187 * if service action represents a ata pass-thru(32) command, 4188 * then pass it to ata_scsi_pass_thru handler. 4189 */ 4190 if (sa == ATA_32) 4191 return ata_scsi_pass_thru(qc); 4192 4193 /* unsupported service action */ 4194 return 1; 4195 } 4196 4197 /** 4198 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4199 * @dev: ATA device 4200 * @cmd: SCSI command opcode to consider 4201 * 4202 * Look up the SCSI command given, and determine whether the 4203 * SCSI command is to be translated or simulated. 4204 * 4205 * RETURNS: 4206 * Pointer to translation function if possible, %NULL if not. 4207 */ 4208 4209 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4210 { 4211 switch (cmd) { 4212 case READ_6: 4213 case READ_10: 4214 case READ_16: 4215 4216 case WRITE_6: 4217 case WRITE_10: 4218 case WRITE_16: 4219 return ata_scsi_rw_xlat; 4220 4221 case WRITE_SAME_16: 4222 return ata_scsi_write_same_xlat; 4223 4224 case SYNCHRONIZE_CACHE: 4225 if (ata_try_flush_cache(dev)) 4226 return ata_scsi_flush_xlat; 4227 break; 4228 4229 case VERIFY: 4230 case VERIFY_16: 4231 return ata_scsi_verify_xlat; 4232 4233 case ATA_12: 4234 case ATA_16: 4235 return ata_scsi_pass_thru; 4236 4237 case VARIABLE_LENGTH_CMD: 4238 return ata_scsi_var_len_cdb_xlat; 4239 4240 case MODE_SELECT: 4241 case MODE_SELECT_10: 4242 return ata_scsi_mode_select_xlat; 4243 break; 4244 4245 case ZBC_IN: 4246 return ata_scsi_zbc_in_xlat; 4247 4248 case ZBC_OUT: 4249 return ata_scsi_zbc_out_xlat; 4250 4251 case SECURITY_PROTOCOL_IN: 4252 case SECURITY_PROTOCOL_OUT: 4253 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4254 break; 4255 return ata_scsi_security_inout_xlat; 4256 4257 case START_STOP: 4258 return ata_scsi_start_stop_xlat; 4259 } 4260 4261 return NULL; 4262 } 4263 4264 /** 4265 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 4266 * @ap: ATA port to which the command was being sent 4267 * @cmd: SCSI command to dump 4268 * 4269 * Prints the contents of a SCSI command via printk(). 4270 */ 4271 4272 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 4273 struct scsi_cmnd *cmd) 4274 { 4275 #ifdef ATA_VERBOSE_DEBUG 4276 struct scsi_device *scsidev = cmd->device; 4277 4278 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n", 4279 ap->print_id, 4280 scsidev->channel, scsidev->id, scsidev->lun, 4281 cmd->cmnd); 4282 #endif 4283 } 4284 4285 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 4286 struct ata_device *dev) 4287 { 4288 u8 scsi_op = scmd->cmnd[0]; 4289 ata_xlat_func_t xlat_func; 4290 int rc = 0; 4291 4292 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4293 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 4294 goto bad_cdb_len; 4295 4296 xlat_func = ata_get_xlat_func(dev, scsi_op); 4297 } else { 4298 if (unlikely(!scmd->cmd_len)) 4299 goto bad_cdb_len; 4300 4301 xlat_func = NULL; 4302 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4303 /* relay SCSI command to ATAPI device */ 4304 int len = COMMAND_SIZE(scsi_op); 4305 if (unlikely(len > scmd->cmd_len || 4306 len > dev->cdb_len || 4307 scmd->cmd_len > ATAPI_CDB_LEN)) 4308 goto bad_cdb_len; 4309 4310 xlat_func = atapi_xlat; 4311 } else { 4312 /* ATA_16 passthru, treat as an ATA command */ 4313 if (unlikely(scmd->cmd_len > 16)) 4314 goto bad_cdb_len; 4315 4316 xlat_func = ata_get_xlat_func(dev, scsi_op); 4317 } 4318 } 4319 4320 if (xlat_func) 4321 rc = ata_scsi_translate(dev, scmd, xlat_func); 4322 else 4323 ata_scsi_simulate(dev, scmd); 4324 4325 return rc; 4326 4327 bad_cdb_len: 4328 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4329 scmd->cmd_len, scsi_op, dev->cdb_len); 4330 scmd->result = DID_ERROR << 16; 4331 scmd->scsi_done(scmd); 4332 return 0; 4333 } 4334 4335 /** 4336 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4337 * @shost: SCSI host of command to be sent 4338 * @cmd: SCSI command to be sent 4339 * 4340 * In some cases, this function translates SCSI commands into 4341 * ATA taskfiles, and queues the taskfiles to be sent to 4342 * hardware. In other cases, this function simulates a 4343 * SCSI device by evaluating and responding to certain 4344 * SCSI commands. This creates the overall effect of 4345 * ATA and ATAPI devices appearing as SCSI devices. 4346 * 4347 * LOCKING: 4348 * ATA host lock 4349 * 4350 * RETURNS: 4351 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4352 * 0 otherwise. 4353 */ 4354 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4355 { 4356 struct ata_port *ap; 4357 struct ata_device *dev; 4358 struct scsi_device *scsidev = cmd->device; 4359 int rc = 0; 4360 unsigned long irq_flags; 4361 4362 ap = ata_shost_to_port(shost); 4363 4364 spin_lock_irqsave(ap->lock, irq_flags); 4365 4366 ata_scsi_dump_cdb(ap, cmd); 4367 4368 dev = ata_scsi_find_dev(ap, scsidev); 4369 if (likely(dev)) 4370 rc = __ata_scsi_queuecmd(cmd, dev); 4371 else { 4372 cmd->result = (DID_BAD_TARGET << 16); 4373 cmd->scsi_done(cmd); 4374 } 4375 4376 spin_unlock_irqrestore(ap->lock, irq_flags); 4377 4378 return rc; 4379 } 4380 4381 /** 4382 * ata_scsi_simulate - simulate SCSI command on ATA device 4383 * @dev: the target device 4384 * @cmd: SCSI command being sent to device. 4385 * 4386 * Interprets and directly executes a select list of SCSI commands 4387 * that can be handled internally. 4388 * 4389 * LOCKING: 4390 * spin_lock_irqsave(host lock) 4391 */ 4392 4393 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4394 { 4395 struct ata_scsi_args args; 4396 const u8 *scsicmd = cmd->cmnd; 4397 u8 tmp8; 4398 4399 args.dev = dev; 4400 args.id = dev->id; 4401 args.cmd = cmd; 4402 4403 switch(scsicmd[0]) { 4404 case INQUIRY: 4405 if (scsicmd[1] & 2) /* is CmdDt set? */ 4406 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4407 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4408 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4409 else switch (scsicmd[2]) { 4410 case 0x00: 4411 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4412 break; 4413 case 0x80: 4414 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4415 break; 4416 case 0x83: 4417 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4418 break; 4419 case 0x89: 4420 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4421 break; 4422 case 0xb0: 4423 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4424 break; 4425 case 0xb1: 4426 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4427 break; 4428 case 0xb2: 4429 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4430 break; 4431 case 0xb6: 4432 if (dev->flags & ATA_DFLAG_ZAC) { 4433 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4434 break; 4435 } 4436 /* Fallthrough */ 4437 default: 4438 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4439 break; 4440 } 4441 break; 4442 4443 case MODE_SENSE: 4444 case MODE_SENSE_10: 4445 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4446 break; 4447 4448 case READ_CAPACITY: 4449 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4450 break; 4451 4452 case SERVICE_ACTION_IN_16: 4453 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4454 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4455 else 4456 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4457 break; 4458 4459 case REPORT_LUNS: 4460 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4461 break; 4462 4463 case REQUEST_SENSE: 4464 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4465 cmd->result = (DRIVER_SENSE << 24); 4466 break; 4467 4468 /* if we reach this, then writeback caching is disabled, 4469 * turning this into a no-op. 4470 */ 4471 case SYNCHRONIZE_CACHE: 4472 /* fall through */ 4473 4474 /* no-op's, complete with success */ 4475 case REZERO_UNIT: 4476 case SEEK_6: 4477 case SEEK_10: 4478 case TEST_UNIT_READY: 4479 break; 4480 4481 case SEND_DIAGNOSTIC: 4482 tmp8 = scsicmd[1] & ~(1 << 3); 4483 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4484 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4485 break; 4486 4487 case MAINTENANCE_IN: 4488 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4489 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4490 else 4491 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4492 break; 4493 4494 /* all other commands */ 4495 default: 4496 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4497 /* "Invalid command operation code" */ 4498 break; 4499 } 4500 4501 cmd->scsi_done(cmd); 4502 } 4503 4504 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4505 { 4506 int i, rc; 4507 4508 for (i = 0; i < host->n_ports; i++) { 4509 struct ata_port *ap = host->ports[i]; 4510 struct Scsi_Host *shost; 4511 4512 rc = -ENOMEM; 4513 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4514 if (!shost) 4515 goto err_alloc; 4516 4517 shost->eh_noresume = 1; 4518 *(struct ata_port **)&shost->hostdata[0] = ap; 4519 ap->scsi_host = shost; 4520 4521 shost->transportt = ata_scsi_transport_template; 4522 shost->unique_id = ap->print_id; 4523 shost->max_id = 16; 4524 shost->max_lun = 1; 4525 shost->max_channel = 1; 4526 shost->max_cmd_len = 32; 4527 4528 /* Schedule policy is determined by ->qc_defer() 4529 * callback and it needs to see every deferred qc. 4530 * Set host_blocked to 1 to prevent SCSI midlayer from 4531 * automatically deferring requests. 4532 */ 4533 shost->max_host_blocked = 1; 4534 4535 rc = scsi_add_host_with_dma(ap->scsi_host, 4536 &ap->tdev, ap->host->dev); 4537 if (rc) 4538 goto err_add; 4539 } 4540 4541 return 0; 4542 4543 err_add: 4544 scsi_host_put(host->ports[i]->scsi_host); 4545 err_alloc: 4546 while (--i >= 0) { 4547 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4548 4549 scsi_remove_host(shost); 4550 scsi_host_put(shost); 4551 } 4552 return rc; 4553 } 4554 4555 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4556 { 4557 int tries = 5; 4558 struct ata_device *last_failed_dev = NULL; 4559 struct ata_link *link; 4560 struct ata_device *dev; 4561 4562 repeat: 4563 ata_for_each_link(link, ap, EDGE) { 4564 ata_for_each_dev(dev, link, ENABLED) { 4565 struct scsi_device *sdev; 4566 int channel = 0, id = 0; 4567 4568 if (dev->sdev) 4569 continue; 4570 4571 if (ata_is_host_link(link)) 4572 id = dev->devno; 4573 else 4574 channel = link->pmp; 4575 4576 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4577 NULL); 4578 if (!IS_ERR(sdev)) { 4579 dev->sdev = sdev; 4580 scsi_device_put(sdev); 4581 } else { 4582 dev->sdev = NULL; 4583 } 4584 } 4585 } 4586 4587 /* If we scanned while EH was in progress or allocation 4588 * failure occurred, scan would have failed silently. Check 4589 * whether all devices are attached. 4590 */ 4591 ata_for_each_link(link, ap, EDGE) { 4592 ata_for_each_dev(dev, link, ENABLED) { 4593 if (!dev->sdev) 4594 goto exit_loop; 4595 } 4596 } 4597 exit_loop: 4598 if (!link) 4599 return; 4600 4601 /* we're missing some SCSI devices */ 4602 if (sync) { 4603 /* If caller requested synchrnous scan && we've made 4604 * any progress, sleep briefly and repeat. 4605 */ 4606 if (dev != last_failed_dev) { 4607 msleep(100); 4608 last_failed_dev = dev; 4609 goto repeat; 4610 } 4611 4612 /* We might be failing to detect boot device, give it 4613 * a few more chances. 4614 */ 4615 if (--tries) { 4616 msleep(100); 4617 goto repeat; 4618 } 4619 4620 ata_port_err(ap, 4621 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4622 } 4623 4624 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4625 round_jiffies_relative(HZ)); 4626 } 4627 4628 /** 4629 * ata_scsi_offline_dev - offline attached SCSI device 4630 * @dev: ATA device to offline attached SCSI device for 4631 * 4632 * This function is called from ata_eh_hotplug() and responsible 4633 * for taking the SCSI device attached to @dev offline. This 4634 * function is called with host lock which protects dev->sdev 4635 * against clearing. 4636 * 4637 * LOCKING: 4638 * spin_lock_irqsave(host lock) 4639 * 4640 * RETURNS: 4641 * 1 if attached SCSI device exists, 0 otherwise. 4642 */ 4643 int ata_scsi_offline_dev(struct ata_device *dev) 4644 { 4645 if (dev->sdev) { 4646 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4647 return 1; 4648 } 4649 return 0; 4650 } 4651 4652 /** 4653 * ata_scsi_remove_dev - remove attached SCSI device 4654 * @dev: ATA device to remove attached SCSI device for 4655 * 4656 * This function is called from ata_eh_scsi_hotplug() and 4657 * responsible for removing the SCSI device attached to @dev. 4658 * 4659 * LOCKING: 4660 * Kernel thread context (may sleep). 4661 */ 4662 static void ata_scsi_remove_dev(struct ata_device *dev) 4663 { 4664 struct ata_port *ap = dev->link->ap; 4665 struct scsi_device *sdev; 4666 unsigned long flags; 4667 4668 /* Alas, we need to grab scan_mutex to ensure SCSI device 4669 * state doesn't change underneath us and thus 4670 * scsi_device_get() always succeeds. The mutex locking can 4671 * be removed if there is __scsi_device_get() interface which 4672 * increments reference counts regardless of device state. 4673 */ 4674 mutex_lock(&ap->scsi_host->scan_mutex); 4675 spin_lock_irqsave(ap->lock, flags); 4676 4677 /* clearing dev->sdev is protected by host lock */ 4678 sdev = dev->sdev; 4679 dev->sdev = NULL; 4680 4681 if (sdev) { 4682 /* If user initiated unplug races with us, sdev can go 4683 * away underneath us after the host lock and 4684 * scan_mutex are released. Hold onto it. 4685 */ 4686 if (scsi_device_get(sdev) == 0) { 4687 /* The following ensures the attached sdev is 4688 * offline on return from ata_scsi_offline_dev() 4689 * regardless it wins or loses the race 4690 * against this function. 4691 */ 4692 scsi_device_set_state(sdev, SDEV_OFFLINE); 4693 } else { 4694 WARN_ON(1); 4695 sdev = NULL; 4696 } 4697 } 4698 4699 spin_unlock_irqrestore(ap->lock, flags); 4700 mutex_unlock(&ap->scsi_host->scan_mutex); 4701 4702 if (sdev) { 4703 ata_dev_info(dev, "detaching (SCSI %s)\n", 4704 dev_name(&sdev->sdev_gendev)); 4705 4706 scsi_remove_device(sdev); 4707 scsi_device_put(sdev); 4708 } 4709 } 4710 4711 static void ata_scsi_handle_link_detach(struct ata_link *link) 4712 { 4713 struct ata_port *ap = link->ap; 4714 struct ata_device *dev; 4715 4716 ata_for_each_dev(dev, link, ALL) { 4717 unsigned long flags; 4718 4719 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4720 continue; 4721 4722 spin_lock_irqsave(ap->lock, flags); 4723 dev->flags &= ~ATA_DFLAG_DETACHED; 4724 spin_unlock_irqrestore(ap->lock, flags); 4725 4726 if (zpodd_dev_enabled(dev)) 4727 zpodd_exit(dev); 4728 4729 ata_scsi_remove_dev(dev); 4730 } 4731 } 4732 4733 /** 4734 * ata_scsi_media_change_notify - send media change event 4735 * @dev: Pointer to the disk device with media change event 4736 * 4737 * Tell the block layer to send a media change notification 4738 * event. 4739 * 4740 * LOCKING: 4741 * spin_lock_irqsave(host lock) 4742 */ 4743 void ata_scsi_media_change_notify(struct ata_device *dev) 4744 { 4745 if (dev->sdev) 4746 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4747 GFP_ATOMIC); 4748 } 4749 4750 /** 4751 * ata_scsi_hotplug - SCSI part of hotplug 4752 * @work: Pointer to ATA port to perform SCSI hotplug on 4753 * 4754 * Perform SCSI part of hotplug. It's executed from a separate 4755 * workqueue after EH completes. This is necessary because SCSI 4756 * hot plugging requires working EH and hot unplugging is 4757 * synchronized with hot plugging with a mutex. 4758 * 4759 * LOCKING: 4760 * Kernel thread context (may sleep). 4761 */ 4762 void ata_scsi_hotplug(struct work_struct *work) 4763 { 4764 struct ata_port *ap = 4765 container_of(work, struct ata_port, hotplug_task.work); 4766 int i; 4767 4768 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4769 DPRINTK("ENTER/EXIT - unloading\n"); 4770 return; 4771 } 4772 4773 /* 4774 * XXX - UGLY HACK 4775 * 4776 * The block layer suspend/resume path is fundamentally broken due 4777 * to freezable kthreads and workqueue and may deadlock if a block 4778 * device gets removed while resume is in progress. I don't know 4779 * what the solution is short of removing freezable kthreads and 4780 * workqueues altogether. 4781 * 4782 * The following is an ugly hack to avoid kicking off device 4783 * removal while freezer is active. This is a joke but does avoid 4784 * this particular deadlock scenario. 4785 * 4786 * https://bugzilla.kernel.org/show_bug.cgi?id=62801 4787 * http://marc.info/?l=linux-kernel&m=138695698516487 4788 */ 4789 #ifdef CONFIG_FREEZER 4790 while (pm_freezing) 4791 msleep(10); 4792 #endif 4793 4794 DPRINTK("ENTER\n"); 4795 mutex_lock(&ap->scsi_scan_mutex); 4796 4797 /* Unplug detached devices. We cannot use link iterator here 4798 * because PMP links have to be scanned even if PMP is 4799 * currently not attached. Iterate manually. 4800 */ 4801 ata_scsi_handle_link_detach(&ap->link); 4802 if (ap->pmp_link) 4803 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4804 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4805 4806 /* scan for new ones */ 4807 ata_scsi_scan_host(ap, 0); 4808 4809 mutex_unlock(&ap->scsi_scan_mutex); 4810 DPRINTK("EXIT\n"); 4811 } 4812 4813 /** 4814 * ata_scsi_user_scan - indication for user-initiated bus scan 4815 * @shost: SCSI host to scan 4816 * @channel: Channel to scan 4817 * @id: ID to scan 4818 * @lun: LUN to scan 4819 * 4820 * This function is called when user explicitly requests bus 4821 * scan. Set probe pending flag and invoke EH. 4822 * 4823 * LOCKING: 4824 * SCSI layer (we don't care) 4825 * 4826 * RETURNS: 4827 * Zero. 4828 */ 4829 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4830 unsigned int id, u64 lun) 4831 { 4832 struct ata_port *ap = ata_shost_to_port(shost); 4833 unsigned long flags; 4834 int devno, rc = 0; 4835 4836 if (!ap->ops->error_handler) 4837 return -EOPNOTSUPP; 4838 4839 if (lun != SCAN_WILD_CARD && lun) 4840 return -EINVAL; 4841 4842 if (!sata_pmp_attached(ap)) { 4843 if (channel != SCAN_WILD_CARD && channel) 4844 return -EINVAL; 4845 devno = id; 4846 } else { 4847 if (id != SCAN_WILD_CARD && id) 4848 return -EINVAL; 4849 devno = channel; 4850 } 4851 4852 spin_lock_irqsave(ap->lock, flags); 4853 4854 if (devno == SCAN_WILD_CARD) { 4855 struct ata_link *link; 4856 4857 ata_for_each_link(link, ap, EDGE) { 4858 struct ata_eh_info *ehi = &link->eh_info; 4859 ehi->probe_mask |= ATA_ALL_DEVICES; 4860 ehi->action |= ATA_EH_RESET; 4861 } 4862 } else { 4863 struct ata_device *dev = ata_find_dev(ap, devno); 4864 4865 if (dev) { 4866 struct ata_eh_info *ehi = &dev->link->eh_info; 4867 ehi->probe_mask |= 1 << dev->devno; 4868 ehi->action |= ATA_EH_RESET; 4869 } else 4870 rc = -EINVAL; 4871 } 4872 4873 if (rc == 0) { 4874 ata_port_schedule_eh(ap); 4875 spin_unlock_irqrestore(ap->lock, flags); 4876 ata_port_wait_eh(ap); 4877 } else 4878 spin_unlock_irqrestore(ap->lock, flags); 4879 4880 return rc; 4881 } 4882 4883 /** 4884 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4885 * @work: Pointer to ATA port to perform scsi_rescan_device() 4886 * 4887 * After ATA pass thru (SAT) commands are executed successfully, 4888 * libata need to propagate the changes to SCSI layer. 4889 * 4890 * LOCKING: 4891 * Kernel thread context (may sleep). 4892 */ 4893 void ata_scsi_dev_rescan(struct work_struct *work) 4894 { 4895 struct ata_port *ap = 4896 container_of(work, struct ata_port, scsi_rescan_task); 4897 struct ata_link *link; 4898 struct ata_device *dev; 4899 unsigned long flags; 4900 4901 mutex_lock(&ap->scsi_scan_mutex); 4902 spin_lock_irqsave(ap->lock, flags); 4903 4904 ata_for_each_link(link, ap, EDGE) { 4905 ata_for_each_dev(dev, link, ENABLED) { 4906 struct scsi_device *sdev = dev->sdev; 4907 4908 if (!sdev) 4909 continue; 4910 if (scsi_device_get(sdev)) 4911 continue; 4912 4913 spin_unlock_irqrestore(ap->lock, flags); 4914 scsi_rescan_device(&(sdev->sdev_gendev)); 4915 scsi_device_put(sdev); 4916 spin_lock_irqsave(ap->lock, flags); 4917 } 4918 } 4919 4920 spin_unlock_irqrestore(ap->lock, flags); 4921 mutex_unlock(&ap->scsi_scan_mutex); 4922 } 4923 4924 /** 4925 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 4926 * @host: ATA host container for all SAS ports 4927 * @port_info: Information from low-level host driver 4928 * @shost: SCSI host that the scsi device is attached to 4929 * 4930 * LOCKING: 4931 * PCI/etc. bus probe sem. 4932 * 4933 * RETURNS: 4934 * ata_port pointer on success / NULL on failure. 4935 */ 4936 4937 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 4938 struct ata_port_info *port_info, 4939 struct Scsi_Host *shost) 4940 { 4941 struct ata_port *ap; 4942 4943 ap = ata_port_alloc(host); 4944 if (!ap) 4945 return NULL; 4946 4947 ap->port_no = 0; 4948 ap->lock = &host->lock; 4949 ap->pio_mask = port_info->pio_mask; 4950 ap->mwdma_mask = port_info->mwdma_mask; 4951 ap->udma_mask = port_info->udma_mask; 4952 ap->flags |= port_info->flags; 4953 ap->ops = port_info->port_ops; 4954 ap->cbl = ATA_CBL_SATA; 4955 4956 return ap; 4957 } 4958 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 4959 4960 /** 4961 * ata_sas_port_start - Set port up for dma. 4962 * @ap: Port to initialize 4963 * 4964 * Called just after data structures for each port are 4965 * initialized. 4966 * 4967 * May be used as the port_start() entry in ata_port_operations. 4968 * 4969 * LOCKING: 4970 * Inherited from caller. 4971 */ 4972 int ata_sas_port_start(struct ata_port *ap) 4973 { 4974 /* 4975 * the port is marked as frozen at allocation time, but if we don't 4976 * have new eh, we won't thaw it 4977 */ 4978 if (!ap->ops->error_handler) 4979 ap->pflags &= ~ATA_PFLAG_FROZEN; 4980 return 0; 4981 } 4982 EXPORT_SYMBOL_GPL(ata_sas_port_start); 4983 4984 /** 4985 * ata_port_stop - Undo ata_sas_port_start() 4986 * @ap: Port to shut down 4987 * 4988 * May be used as the port_stop() entry in ata_port_operations. 4989 * 4990 * LOCKING: 4991 * Inherited from caller. 4992 */ 4993 4994 void ata_sas_port_stop(struct ata_port *ap) 4995 { 4996 } 4997 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 4998 4999 /** 5000 * ata_sas_async_probe - simply schedule probing and return 5001 * @ap: Port to probe 5002 * 5003 * For batch scheduling of probe for sas attached ata devices, assumes 5004 * the port has already been through ata_sas_port_init() 5005 */ 5006 void ata_sas_async_probe(struct ata_port *ap) 5007 { 5008 __ata_port_probe(ap); 5009 } 5010 EXPORT_SYMBOL_GPL(ata_sas_async_probe); 5011 5012 int ata_sas_sync_probe(struct ata_port *ap) 5013 { 5014 return ata_port_probe(ap); 5015 } 5016 EXPORT_SYMBOL_GPL(ata_sas_sync_probe); 5017 5018 5019 /** 5020 * ata_sas_port_init - Initialize a SATA device 5021 * @ap: SATA port to initialize 5022 * 5023 * LOCKING: 5024 * PCI/etc. bus probe sem. 5025 * 5026 * RETURNS: 5027 * Zero on success, non-zero on error. 5028 */ 5029 5030 int ata_sas_port_init(struct ata_port *ap) 5031 { 5032 int rc = ap->ops->port_start(ap); 5033 5034 if (rc) 5035 return rc; 5036 ap->print_id = atomic_inc_return(&ata_print_id); 5037 return 0; 5038 } 5039 EXPORT_SYMBOL_GPL(ata_sas_port_init); 5040 5041 int ata_sas_tport_add(struct device *parent, struct ata_port *ap) 5042 { 5043 return ata_tport_add(parent, ap); 5044 } 5045 EXPORT_SYMBOL_GPL(ata_sas_tport_add); 5046 5047 void ata_sas_tport_delete(struct ata_port *ap) 5048 { 5049 ata_tport_delete(ap); 5050 } 5051 EXPORT_SYMBOL_GPL(ata_sas_tport_delete); 5052 5053 /** 5054 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 5055 * @ap: SATA port to destroy 5056 * 5057 */ 5058 5059 void ata_sas_port_destroy(struct ata_port *ap) 5060 { 5061 if (ap->ops->port_stop) 5062 ap->ops->port_stop(ap); 5063 kfree(ap); 5064 } 5065 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 5066 5067 /** 5068 * ata_sas_slave_configure - Default slave_config routine for libata devices 5069 * @sdev: SCSI device to configure 5070 * @ap: ATA port to which SCSI device is attached 5071 * 5072 * RETURNS: 5073 * Zero. 5074 */ 5075 5076 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 5077 { 5078 ata_scsi_sdev_config(sdev); 5079 ata_scsi_dev_config(sdev, ap->link.device); 5080 return 0; 5081 } 5082 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 5083 5084 /** 5085 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 5086 * @cmd: SCSI command to be sent 5087 * @ap: ATA port to which the command is being sent 5088 * 5089 * RETURNS: 5090 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 5091 * 0 otherwise. 5092 */ 5093 5094 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 5095 { 5096 int rc = 0; 5097 5098 ata_scsi_dump_cdb(ap, cmd); 5099 5100 if (likely(ata_dev_enabled(ap->link.device))) 5101 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 5102 else { 5103 cmd->result = (DID_BAD_TARGET << 16); 5104 cmd->scsi_done(cmd); 5105 } 5106 return rc; 5107 } 5108 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 5109 5110 int ata_sas_allocate_tag(struct ata_port *ap) 5111 { 5112 unsigned int max_queue = ap->host->n_tags; 5113 unsigned int i, tag; 5114 5115 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) { 5116 tag = tag < max_queue ? tag : 0; 5117 5118 /* the last tag is reserved for internal command. */ 5119 if (ata_tag_internal(tag)) 5120 continue; 5121 5122 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) { 5123 ap->sas_last_tag = tag; 5124 return tag; 5125 } 5126 } 5127 return -1; 5128 } 5129 5130 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) 5131 { 5132 clear_bit(tag, &ap->sas_tag_allocated); 5133 } 5134