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 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) 1790 { 1791 struct request *rq = scmd->request; 1792 u32 req_blocks; 1793 1794 if (!blk_rq_is_passthrough(rq)) 1795 return true; 1796 1797 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; 1798 if (n_blocks > req_blocks) 1799 return false; 1800 1801 return true; 1802 } 1803 1804 /** 1805 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1806 * @qc: Storage for translated ATA taskfile 1807 * 1808 * Converts any of six SCSI read/write commands into the 1809 * ATA counterpart, including starting sector (LBA), 1810 * sector count, and taking into account the device's LBA48 1811 * support. 1812 * 1813 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1814 * %WRITE_16 are currently supported. 1815 * 1816 * LOCKING: 1817 * spin_lock_irqsave(host lock) 1818 * 1819 * RETURNS: 1820 * Zero on success, non-zero on error. 1821 */ 1822 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1823 { 1824 struct scsi_cmnd *scmd = qc->scsicmd; 1825 const u8 *cdb = scmd->cmnd; 1826 struct request *rq = scmd->request; 1827 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1828 unsigned int tf_flags = 0; 1829 u64 block; 1830 u32 n_block; 1831 int rc; 1832 u16 fp = 0; 1833 1834 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1835 tf_flags |= ATA_TFLAG_WRITE; 1836 1837 /* Calculate the SCSI LBA, transfer length and FUA. */ 1838 switch (cdb[0]) { 1839 case READ_10: 1840 case WRITE_10: 1841 if (unlikely(scmd->cmd_len < 10)) { 1842 fp = 9; 1843 goto invalid_fld; 1844 } 1845 scsi_10_lba_len(cdb, &block, &n_block); 1846 if (cdb[1] & (1 << 3)) 1847 tf_flags |= ATA_TFLAG_FUA; 1848 if (!ata_check_nblocks(scmd, n_block)) 1849 goto invalid_fld; 1850 break; 1851 case READ_6: 1852 case WRITE_6: 1853 if (unlikely(scmd->cmd_len < 6)) { 1854 fp = 5; 1855 goto invalid_fld; 1856 } 1857 scsi_6_lba_len(cdb, &block, &n_block); 1858 1859 /* for 6-byte r/w commands, transfer length 0 1860 * means 256 blocks of data, not 0 block. 1861 */ 1862 if (!n_block) 1863 n_block = 256; 1864 if (!ata_check_nblocks(scmd, n_block)) 1865 goto invalid_fld; 1866 break; 1867 case READ_16: 1868 case WRITE_16: 1869 if (unlikely(scmd->cmd_len < 16)) { 1870 fp = 15; 1871 goto invalid_fld; 1872 } 1873 scsi_16_lba_len(cdb, &block, &n_block); 1874 if (cdb[1] & (1 << 3)) 1875 tf_flags |= ATA_TFLAG_FUA; 1876 if (!ata_check_nblocks(scmd, n_block)) 1877 goto invalid_fld; 1878 break; 1879 default: 1880 DPRINTK("no-byte command\n"); 1881 fp = 0; 1882 goto invalid_fld; 1883 } 1884 1885 /* Check and compose ATA command */ 1886 if (!n_block) 1887 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1888 * length 0 means transfer 0 block of data. 1889 * However, for ATA R/W commands, sector count 0 means 1890 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1891 * 1892 * WARNING: one or two older ATA drives treat 0 as 0... 1893 */ 1894 goto nothing_to_do; 1895 1896 qc->flags |= ATA_QCFLAG_IO; 1897 qc->nbytes = n_block * scmd->device->sector_size; 1898 1899 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1900 qc->hw_tag, class); 1901 1902 if (likely(rc == 0)) 1903 return 0; 1904 1905 if (rc == -ERANGE) 1906 goto out_of_range; 1907 /* treat all other errors as -EINVAL, fall through */ 1908 invalid_fld: 1909 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1910 return 1; 1911 1912 out_of_range: 1913 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1914 /* "Logical Block Address out of range" */ 1915 return 1; 1916 1917 nothing_to_do: 1918 scmd->result = SAM_STAT_GOOD; 1919 return 1; 1920 } 1921 1922 static void ata_qc_done(struct ata_queued_cmd *qc) 1923 { 1924 struct scsi_cmnd *cmd = qc->scsicmd; 1925 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1926 1927 ata_qc_free(qc); 1928 done(cmd); 1929 } 1930 1931 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1932 { 1933 struct ata_port *ap = qc->ap; 1934 struct scsi_cmnd *cmd = qc->scsicmd; 1935 u8 *cdb = cmd->cmnd; 1936 int need_sense = (qc->err_mask != 0); 1937 1938 /* For ATA pass thru (SAT) commands, generate a sense block if 1939 * user mandated it or if there's an error. Note that if we 1940 * generate because the user forced us to [CK_COND =1], a check 1941 * condition is generated and the ATA register values are returned 1942 * whether the command completed successfully or not. If there 1943 * was no error, we use the following sense data: 1944 * sk = RECOVERED ERROR 1945 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1946 */ 1947 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1948 ((cdb[2] & 0x20) || need_sense)) 1949 ata_gen_passthru_sense(qc); 1950 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1951 cmd->result = SAM_STAT_CHECK_CONDITION; 1952 else if (need_sense) 1953 ata_gen_ata_sense(qc); 1954 else 1955 cmd->result = SAM_STAT_GOOD; 1956 1957 if (need_sense && !ap->ops->error_handler) 1958 ata_dump_status(ap->print_id, &qc->result_tf); 1959 1960 ata_qc_done(qc); 1961 } 1962 1963 /** 1964 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1965 * @dev: ATA device to which the command is addressed 1966 * @cmd: SCSI command to execute 1967 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1968 * 1969 * Our ->queuecommand() function has decided that the SCSI 1970 * command issued can be directly translated into an ATA 1971 * command, rather than handled internally. 1972 * 1973 * This function sets up an ata_queued_cmd structure for the 1974 * SCSI command, and sends that ata_queued_cmd to the hardware. 1975 * 1976 * The xlat_func argument (actor) returns 0 if ready to execute 1977 * ATA command, else 1 to finish translation. If 1 is returned 1978 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1979 * to be set reflecting an error condition or clean (early) 1980 * termination. 1981 * 1982 * LOCKING: 1983 * spin_lock_irqsave(host lock) 1984 * 1985 * RETURNS: 1986 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1987 * needs to be deferred. 1988 */ 1989 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1990 ata_xlat_func_t xlat_func) 1991 { 1992 struct ata_port *ap = dev->link->ap; 1993 struct ata_queued_cmd *qc; 1994 int rc; 1995 1996 VPRINTK("ENTER\n"); 1997 1998 qc = ata_scsi_qc_new(dev, cmd); 1999 if (!qc) 2000 goto err_mem; 2001 2002 /* data is present; dma-map it */ 2003 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 2004 cmd->sc_data_direction == DMA_TO_DEVICE) { 2005 if (unlikely(scsi_bufflen(cmd) < 1)) { 2006 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 2007 goto err_did; 2008 } 2009 2010 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 2011 2012 qc->dma_dir = cmd->sc_data_direction; 2013 } 2014 2015 qc->complete_fn = ata_scsi_qc_complete; 2016 2017 if (xlat_func(qc)) 2018 goto early_finish; 2019 2020 if (ap->ops->qc_defer) { 2021 if ((rc = ap->ops->qc_defer(qc))) 2022 goto defer; 2023 } 2024 2025 /* select device, send command to hardware */ 2026 ata_qc_issue(qc); 2027 2028 VPRINTK("EXIT\n"); 2029 return 0; 2030 2031 early_finish: 2032 ata_qc_free(qc); 2033 cmd->scsi_done(cmd); 2034 DPRINTK("EXIT - early finish (good or error)\n"); 2035 return 0; 2036 2037 err_did: 2038 ata_qc_free(qc); 2039 cmd->result = (DID_ERROR << 16); 2040 cmd->scsi_done(cmd); 2041 err_mem: 2042 DPRINTK("EXIT - internal\n"); 2043 return 0; 2044 2045 defer: 2046 ata_qc_free(qc); 2047 DPRINTK("EXIT - defer\n"); 2048 if (rc == ATA_DEFER_LINK) 2049 return SCSI_MLQUEUE_DEVICE_BUSY; 2050 else 2051 return SCSI_MLQUEUE_HOST_BUSY; 2052 } 2053 2054 struct ata_scsi_args { 2055 struct ata_device *dev; 2056 u16 *id; 2057 struct scsi_cmnd *cmd; 2058 }; 2059 2060 /** 2061 * ata_scsi_rbuf_get - Map response buffer. 2062 * @cmd: SCSI command containing buffer to be mapped. 2063 * @flags: unsigned long variable to store irq enable status 2064 * @copy_in: copy in from user buffer 2065 * 2066 * Prepare buffer for simulated SCSI commands. 2067 * 2068 * LOCKING: 2069 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 2070 * 2071 * RETURNS: 2072 * Pointer to response buffer. 2073 */ 2074 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 2075 unsigned long *flags) 2076 { 2077 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 2078 2079 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 2080 if (copy_in) 2081 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2082 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2083 return ata_scsi_rbuf; 2084 } 2085 2086 /** 2087 * ata_scsi_rbuf_put - Unmap response buffer. 2088 * @cmd: SCSI command containing buffer to be unmapped. 2089 * @copy_out: copy out result 2090 * @flags: @flags passed to ata_scsi_rbuf_get() 2091 * 2092 * Returns rbuf buffer. The result is copied to @cmd's buffer if 2093 * @copy_back is true. 2094 * 2095 * LOCKING: 2096 * Unlocks ata_scsi_rbuf_lock. 2097 */ 2098 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 2099 unsigned long *flags) 2100 { 2101 if (copy_out) 2102 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2103 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2104 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 2105 } 2106 2107 /** 2108 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 2109 * @args: device IDENTIFY data / SCSI command of interest. 2110 * @actor: Callback hook for desired SCSI command simulator 2111 * 2112 * Takes care of the hard work of simulating a SCSI command... 2113 * Mapping the response buffer, calling the command's handler, 2114 * and handling the handler's return value. This return value 2115 * indicates whether the handler wishes the SCSI command to be 2116 * completed successfully (0), or not (in which case cmd->result 2117 * and sense buffer are assumed to be set). 2118 * 2119 * LOCKING: 2120 * spin_lock_irqsave(host lock) 2121 */ 2122 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 2123 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 2124 { 2125 u8 *rbuf; 2126 unsigned int rc; 2127 struct scsi_cmnd *cmd = args->cmd; 2128 unsigned long flags; 2129 2130 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 2131 rc = actor(args, rbuf); 2132 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 2133 2134 if (rc == 0) 2135 cmd->result = SAM_STAT_GOOD; 2136 } 2137 2138 /** 2139 * ata_scsiop_inq_std - Simulate INQUIRY command 2140 * @args: device IDENTIFY data / SCSI command of interest. 2141 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2142 * 2143 * Returns standard device identification data associated 2144 * with non-VPD INQUIRY command output. 2145 * 2146 * LOCKING: 2147 * spin_lock_irqsave(host lock) 2148 */ 2149 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 2150 { 2151 static const u8 versions[] = { 2152 0x00, 2153 0x60, /* SAM-3 (no version claimed) */ 2154 2155 0x03, 2156 0x20, /* SBC-2 (no version claimed) */ 2157 2158 0x03, 2159 0x00 /* SPC-3 (no version claimed) */ 2160 }; 2161 static const u8 versions_zbc[] = { 2162 0x00, 2163 0xA0, /* SAM-5 (no version claimed) */ 2164 2165 0x06, 2166 0x00, /* SBC-4 (no version claimed) */ 2167 2168 0x05, 2169 0xC0, /* SPC-5 (no version claimed) */ 2170 2171 0x60, 2172 0x24, /* ZBC r05 */ 2173 }; 2174 2175 u8 hdr[] = { 2176 TYPE_DISK, 2177 0, 2178 0x5, /* claim SPC-3 version compatibility */ 2179 2, 2180 95 - 4, 2181 0, 2182 0, 2183 2 2184 }; 2185 2186 VPRINTK("ENTER\n"); 2187 2188 /* set scsi removable (RMB) bit per ata bit, or if the 2189 * AHCI port says it's external (Hotplug-capable, eSATA). 2190 */ 2191 if (ata_id_removable(args->id) || 2192 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 2193 hdr[1] |= (1 << 7); 2194 2195 if (args->dev->class == ATA_DEV_ZAC) { 2196 hdr[0] = TYPE_ZBC; 2197 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 2198 } 2199 2200 memcpy(rbuf, hdr, sizeof(hdr)); 2201 memcpy(&rbuf[8], "ATA ", 8); 2202 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 2203 2204 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2205 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2206 if (strncmp(&rbuf[32], " ", 4) == 0) 2207 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2208 2209 if (rbuf[32] == 0 || rbuf[32] == ' ') 2210 memcpy(&rbuf[32], "n/a ", 4); 2211 2212 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 2213 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2214 else 2215 memcpy(rbuf + 58, versions, sizeof(versions)); 2216 2217 return 0; 2218 } 2219 2220 /** 2221 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2222 * @args: device IDENTIFY data / SCSI command of interest. 2223 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2224 * 2225 * Returns list of inquiry VPD pages available. 2226 * 2227 * LOCKING: 2228 * spin_lock_irqsave(host lock) 2229 */ 2230 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 2231 { 2232 int num_pages; 2233 static const u8 pages[] = { 2234 0x00, /* page 0x00, this page */ 2235 0x80, /* page 0x80, unit serial no page */ 2236 0x83, /* page 0x83, device ident page */ 2237 0x89, /* page 0x89, ata info page */ 2238 0xb0, /* page 0xb0, block limits page */ 2239 0xb1, /* page 0xb1, block device characteristics page */ 2240 0xb2, /* page 0xb2, thin provisioning page */ 2241 0xb6, /* page 0xb6, zoned block device characteristics */ 2242 }; 2243 2244 num_pages = sizeof(pages); 2245 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 2246 num_pages--; 2247 rbuf[3] = num_pages; /* number of supported VPD pages */ 2248 memcpy(rbuf + 4, pages, num_pages); 2249 return 0; 2250 } 2251 2252 /** 2253 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2254 * @args: device IDENTIFY data / SCSI command of interest. 2255 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2256 * 2257 * Returns ATA device serial number. 2258 * 2259 * LOCKING: 2260 * spin_lock_irqsave(host lock) 2261 */ 2262 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2263 { 2264 static const u8 hdr[] = { 2265 0, 2266 0x80, /* this page code */ 2267 0, 2268 ATA_ID_SERNO_LEN, /* page len */ 2269 }; 2270 2271 memcpy(rbuf, hdr, sizeof(hdr)); 2272 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2273 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2274 return 0; 2275 } 2276 2277 /** 2278 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2279 * @args: device IDENTIFY data / SCSI command of interest. 2280 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2281 * 2282 * Yields two logical unit device identification designators: 2283 * - vendor specific ASCII containing the ATA serial number 2284 * - SAT defined "t10 vendor id based" containing ASCII vendor 2285 * name ("ATA "), model and serial numbers. 2286 * 2287 * LOCKING: 2288 * spin_lock_irqsave(host lock) 2289 */ 2290 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2291 { 2292 const int sat_model_serial_desc_len = 68; 2293 int num; 2294 2295 rbuf[1] = 0x83; /* this page code */ 2296 num = 4; 2297 2298 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2299 rbuf[num + 0] = 2; 2300 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2301 num += 4; 2302 ata_id_string(args->id, (unsigned char *) rbuf + num, 2303 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2304 num += ATA_ID_SERNO_LEN; 2305 2306 /* SAT defined lu model and serial numbers descriptor */ 2307 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2308 rbuf[num + 0] = 2; 2309 rbuf[num + 1] = 1; 2310 rbuf[num + 3] = sat_model_serial_desc_len; 2311 num += 4; 2312 memcpy(rbuf + num, "ATA ", 8); 2313 num += 8; 2314 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2315 ATA_ID_PROD_LEN); 2316 num += ATA_ID_PROD_LEN; 2317 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2318 ATA_ID_SERNO_LEN); 2319 num += ATA_ID_SERNO_LEN; 2320 2321 if (ata_id_has_wwn(args->id)) { 2322 /* SAT defined lu world wide name */ 2323 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2324 rbuf[num + 0] = 1; 2325 rbuf[num + 1] = 3; 2326 rbuf[num + 3] = ATA_ID_WWN_LEN; 2327 num += 4; 2328 ata_id_string(args->id, (unsigned char *) rbuf + num, 2329 ATA_ID_WWN, ATA_ID_WWN_LEN); 2330 num += ATA_ID_WWN_LEN; 2331 } 2332 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2333 return 0; 2334 } 2335 2336 /** 2337 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2338 * @args: device IDENTIFY data / SCSI command of interest. 2339 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2340 * 2341 * Yields SAT-specified ATA VPD page. 2342 * 2343 * LOCKING: 2344 * spin_lock_irqsave(host lock) 2345 */ 2346 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2347 { 2348 struct ata_taskfile tf; 2349 2350 memset(&tf, 0, sizeof(tf)); 2351 2352 rbuf[1] = 0x89; /* our page code */ 2353 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2354 rbuf[3] = (0x238 & 0xff); 2355 2356 memcpy(&rbuf[8], "linux ", 8); 2357 memcpy(&rbuf[16], "libata ", 16); 2358 memcpy(&rbuf[32], DRV_VERSION, 4); 2359 2360 /* we don't store the ATA device signature, so we fake it */ 2361 2362 tf.command = ATA_DRDY; /* really, this is Status reg */ 2363 tf.lbal = 0x1; 2364 tf.nsect = 0x1; 2365 2366 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2367 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2368 2369 rbuf[56] = ATA_CMD_ID_ATA; 2370 2371 memcpy(&rbuf[60], &args->id[0], 512); 2372 return 0; 2373 } 2374 2375 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2376 { 2377 u16 min_io_sectors; 2378 2379 rbuf[1] = 0xb0; 2380 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2381 2382 /* 2383 * Optimal transfer length granularity. 2384 * 2385 * This is always one physical block, but for disks with a smaller 2386 * logical than physical sector size we need to figure out what the 2387 * latter is. 2388 */ 2389 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2390 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2391 2392 /* 2393 * Optimal unmap granularity. 2394 * 2395 * The ATA spec doesn't even know about a granularity or alignment 2396 * for the TRIM command. We can leave away most of the unmap related 2397 * VPD page entries, but we have specifify a granularity to signal 2398 * that we support some form of unmap - in thise case via WRITE SAME 2399 * with the unmap bit set. 2400 */ 2401 if (ata_id_has_trim(args->id)) { 2402 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); 2403 put_unaligned_be32(1, &rbuf[28]); 2404 } 2405 2406 return 0; 2407 } 2408 2409 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2410 { 2411 int form_factor = ata_id_form_factor(args->id); 2412 int media_rotation_rate = ata_id_rotation_rate(args->id); 2413 u8 zoned = ata_id_zoned_cap(args->id); 2414 2415 rbuf[1] = 0xb1; 2416 rbuf[3] = 0x3c; 2417 rbuf[4] = media_rotation_rate >> 8; 2418 rbuf[5] = media_rotation_rate; 2419 rbuf[7] = form_factor; 2420 if (zoned) 2421 rbuf[8] = (zoned << 4); 2422 2423 return 0; 2424 } 2425 2426 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2427 { 2428 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2429 rbuf[1] = 0xb2; 2430 rbuf[3] = 0x4; 2431 rbuf[5] = 1 << 6; /* TPWS */ 2432 2433 return 0; 2434 } 2435 2436 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2437 { 2438 /* 2439 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2440 */ 2441 rbuf[1] = 0xb6; 2442 rbuf[3] = 0x3C; 2443 2444 /* 2445 * URSWRZ bit is only meaningful for host-managed ZAC drives 2446 */ 2447 if (args->dev->zac_zoned_cap & 1) 2448 rbuf[4] |= 1; 2449 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2450 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2451 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2452 2453 return 0; 2454 } 2455 2456 /** 2457 * modecpy - Prepare response for MODE SENSE 2458 * @dest: output buffer 2459 * @src: data being copied 2460 * @n: length of mode page 2461 * @changeable: whether changeable parameters are requested 2462 * 2463 * Generate a generic MODE SENSE page for either current or changeable 2464 * parameters. 2465 * 2466 * LOCKING: 2467 * None. 2468 */ 2469 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2470 { 2471 if (changeable) { 2472 memcpy(dest, src, 2); 2473 memset(dest + 2, 0, n - 2); 2474 } else { 2475 memcpy(dest, src, n); 2476 } 2477 } 2478 2479 /** 2480 * ata_msense_caching - Simulate MODE SENSE caching info page 2481 * @id: device IDENTIFY data 2482 * @buf: output buffer 2483 * @changeable: whether changeable parameters are requested 2484 * 2485 * Generate a caching info page, which conditionally indicates 2486 * write caching to the SCSI layer, depending on device 2487 * capabilities. 2488 * 2489 * LOCKING: 2490 * None. 2491 */ 2492 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2493 { 2494 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2495 if (changeable) { 2496 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2497 } else { 2498 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2499 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2500 } 2501 return sizeof(def_cache_mpage); 2502 } 2503 2504 /** 2505 * ata_msense_control - Simulate MODE SENSE control mode page 2506 * @dev: ATA device of interest 2507 * @buf: output buffer 2508 * @changeable: whether changeable parameters are requested 2509 * 2510 * Generate a generic MODE SENSE control mode page. 2511 * 2512 * LOCKING: 2513 * None. 2514 */ 2515 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2516 bool changeable) 2517 { 2518 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2519 if (changeable) { 2520 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2521 } else { 2522 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2523 2524 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2525 } 2526 return sizeof(def_control_mpage); 2527 } 2528 2529 /** 2530 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2531 * @buf: output buffer 2532 * @changeable: whether changeable parameters are requested 2533 * 2534 * Generate a generic MODE SENSE r/w error recovery page. 2535 * 2536 * LOCKING: 2537 * None. 2538 */ 2539 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2540 { 2541 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2542 changeable); 2543 return sizeof(def_rw_recovery_mpage); 2544 } 2545 2546 /* 2547 * We can turn this into a real blacklist if it's needed, for now just 2548 * blacklist any Maxtor BANC1G10 revision firmware 2549 */ 2550 static int ata_dev_supports_fua(u16 *id) 2551 { 2552 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2553 2554 if (!libata_fua) 2555 return 0; 2556 if (!ata_id_has_fua(id)) 2557 return 0; 2558 2559 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2560 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2561 2562 if (strcmp(model, "Maxtor")) 2563 return 1; 2564 if (strcmp(fw, "BANC1G10")) 2565 return 1; 2566 2567 return 0; /* blacklisted */ 2568 } 2569 2570 /** 2571 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2572 * @args: device IDENTIFY data / SCSI command of interest. 2573 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2574 * 2575 * Simulate MODE SENSE commands. Assume this is invoked for direct 2576 * access devices (e.g. disks) only. There should be no block 2577 * descriptor for other device types. 2578 * 2579 * LOCKING: 2580 * spin_lock_irqsave(host lock) 2581 */ 2582 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2583 { 2584 struct ata_device *dev = args->dev; 2585 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2586 static const u8 sat_blk_desc[] = { 2587 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2588 0, 2589 0, 0x2, 0x0 /* block length: 512 bytes */ 2590 }; 2591 u8 pg, spg; 2592 unsigned int ebd, page_control, six_byte; 2593 u8 dpofua, bp = 0xff; 2594 u16 fp; 2595 2596 VPRINTK("ENTER\n"); 2597 2598 six_byte = (scsicmd[0] == MODE_SENSE); 2599 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2600 /* 2601 * LLBA bit in msense(10) ignored (compliant) 2602 */ 2603 2604 page_control = scsicmd[2] >> 6; 2605 switch (page_control) { 2606 case 0: /* current */ 2607 case 1: /* changeable */ 2608 case 2: /* defaults */ 2609 break; /* supported */ 2610 case 3: /* saved */ 2611 goto saving_not_supp; 2612 default: 2613 fp = 2; 2614 bp = 6; 2615 goto invalid_fld; 2616 } 2617 2618 if (six_byte) 2619 p += 4 + (ebd ? 8 : 0); 2620 else 2621 p += 8 + (ebd ? 8 : 0); 2622 2623 pg = scsicmd[2] & 0x3f; 2624 spg = scsicmd[3]; 2625 /* 2626 * No mode subpages supported (yet) but asking for _all_ 2627 * subpages may be valid 2628 */ 2629 if (spg && (spg != ALL_SUB_MPAGES)) { 2630 fp = 3; 2631 goto invalid_fld; 2632 } 2633 2634 switch(pg) { 2635 case RW_RECOVERY_MPAGE: 2636 p += ata_msense_rw_recovery(p, page_control == 1); 2637 break; 2638 2639 case CACHE_MPAGE: 2640 p += ata_msense_caching(args->id, p, page_control == 1); 2641 break; 2642 2643 case CONTROL_MPAGE: 2644 p += ata_msense_control(args->dev, p, page_control == 1); 2645 break; 2646 2647 case ALL_MPAGES: 2648 p += ata_msense_rw_recovery(p, page_control == 1); 2649 p += ata_msense_caching(args->id, p, page_control == 1); 2650 p += ata_msense_control(args->dev, p, page_control == 1); 2651 break; 2652 2653 default: /* invalid page code */ 2654 fp = 2; 2655 goto invalid_fld; 2656 } 2657 2658 dpofua = 0; 2659 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2660 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2661 dpofua = 1 << 4; 2662 2663 if (six_byte) { 2664 rbuf[0] = p - rbuf - 1; 2665 rbuf[2] |= dpofua; 2666 if (ebd) { 2667 rbuf[3] = sizeof(sat_blk_desc); 2668 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2669 } 2670 } else { 2671 unsigned int output_len = p - rbuf - 2; 2672 2673 rbuf[0] = output_len >> 8; 2674 rbuf[1] = output_len; 2675 rbuf[3] |= dpofua; 2676 if (ebd) { 2677 rbuf[7] = sizeof(sat_blk_desc); 2678 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2679 } 2680 } 2681 return 0; 2682 2683 invalid_fld: 2684 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2685 return 1; 2686 2687 saving_not_supp: 2688 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2689 /* "Saving parameters not supported" */ 2690 return 1; 2691 } 2692 2693 /** 2694 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2695 * @args: device IDENTIFY data / SCSI command of interest. 2696 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2697 * 2698 * Simulate READ CAPACITY commands. 2699 * 2700 * LOCKING: 2701 * None. 2702 */ 2703 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2704 { 2705 struct ata_device *dev = args->dev; 2706 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2707 u32 sector_size; /* physical sector size in bytes */ 2708 u8 log2_per_phys; 2709 u16 lowest_aligned; 2710 2711 sector_size = ata_id_logical_sector_size(dev->id); 2712 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2713 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2714 2715 VPRINTK("ENTER\n"); 2716 2717 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2718 if (last_lba >= 0xffffffffULL) 2719 last_lba = 0xffffffff; 2720 2721 /* sector count, 32-bit */ 2722 rbuf[0] = last_lba >> (8 * 3); 2723 rbuf[1] = last_lba >> (8 * 2); 2724 rbuf[2] = last_lba >> (8 * 1); 2725 rbuf[3] = last_lba; 2726 2727 /* sector size */ 2728 rbuf[4] = sector_size >> (8 * 3); 2729 rbuf[5] = sector_size >> (8 * 2); 2730 rbuf[6] = sector_size >> (8 * 1); 2731 rbuf[7] = sector_size; 2732 } else { 2733 /* sector count, 64-bit */ 2734 rbuf[0] = last_lba >> (8 * 7); 2735 rbuf[1] = last_lba >> (8 * 6); 2736 rbuf[2] = last_lba >> (8 * 5); 2737 rbuf[3] = last_lba >> (8 * 4); 2738 rbuf[4] = last_lba >> (8 * 3); 2739 rbuf[5] = last_lba >> (8 * 2); 2740 rbuf[6] = last_lba >> (8 * 1); 2741 rbuf[7] = last_lba; 2742 2743 /* sector size */ 2744 rbuf[ 8] = sector_size >> (8 * 3); 2745 rbuf[ 9] = sector_size >> (8 * 2); 2746 rbuf[10] = sector_size >> (8 * 1); 2747 rbuf[11] = sector_size; 2748 2749 rbuf[12] = 0; 2750 rbuf[13] = log2_per_phys; 2751 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2752 rbuf[15] = lowest_aligned; 2753 2754 if (ata_id_has_trim(args->id) && 2755 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2756 rbuf[14] |= 0x80; /* LBPME */ 2757 2758 if (ata_id_has_zero_after_trim(args->id) && 2759 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2760 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2761 rbuf[14] |= 0x40; /* LBPRZ */ 2762 } 2763 } 2764 if (ata_id_zoned_cap(args->id) || 2765 args->dev->class == ATA_DEV_ZAC) 2766 rbuf[12] = (1 << 4); /* RC_BASIS */ 2767 } 2768 return 0; 2769 } 2770 2771 /** 2772 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2773 * @args: device IDENTIFY data / SCSI command of interest. 2774 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2775 * 2776 * Simulate REPORT LUNS command. 2777 * 2778 * LOCKING: 2779 * spin_lock_irqsave(host lock) 2780 */ 2781 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2782 { 2783 VPRINTK("ENTER\n"); 2784 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2785 2786 return 0; 2787 } 2788 2789 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2790 { 2791 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2792 /* FIXME: not quite right; we don't want the 2793 * translation of taskfile registers into 2794 * a sense descriptors, since that's only 2795 * correct for ATA, not ATAPI 2796 */ 2797 ata_gen_passthru_sense(qc); 2798 } 2799 2800 ata_qc_done(qc); 2801 } 2802 2803 /* is it pointless to prefer PIO for "safety reasons"? */ 2804 static inline int ata_pio_use_silly(struct ata_port *ap) 2805 { 2806 return (ap->flags & ATA_FLAG_PIO_DMA); 2807 } 2808 2809 static void atapi_request_sense(struct ata_queued_cmd *qc) 2810 { 2811 struct ata_port *ap = qc->ap; 2812 struct scsi_cmnd *cmd = qc->scsicmd; 2813 2814 DPRINTK("ATAPI request sense\n"); 2815 2816 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2817 2818 #ifdef CONFIG_ATA_SFF 2819 if (ap->ops->sff_tf_read) 2820 ap->ops->sff_tf_read(ap, &qc->tf); 2821 #endif 2822 2823 /* fill these in, for the case where they are -not- overwritten */ 2824 cmd->sense_buffer[0] = 0x70; 2825 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2826 2827 ata_qc_reinit(qc); 2828 2829 /* setup sg table and init transfer direction */ 2830 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2831 ata_sg_init(qc, &qc->sgent, 1); 2832 qc->dma_dir = DMA_FROM_DEVICE; 2833 2834 memset(&qc->cdb, 0, qc->dev->cdb_len); 2835 qc->cdb[0] = REQUEST_SENSE; 2836 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2837 2838 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2839 qc->tf.command = ATA_CMD_PACKET; 2840 2841 if (ata_pio_use_silly(ap)) { 2842 qc->tf.protocol = ATAPI_PROT_DMA; 2843 qc->tf.feature |= ATAPI_PKT_DMA; 2844 } else { 2845 qc->tf.protocol = ATAPI_PROT_PIO; 2846 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2847 qc->tf.lbah = 0; 2848 } 2849 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2850 2851 qc->complete_fn = atapi_sense_complete; 2852 2853 ata_qc_issue(qc); 2854 2855 DPRINTK("EXIT\n"); 2856 } 2857 2858 /* 2859 * ATAPI devices typically report zero for their SCSI version, and sometimes 2860 * deviate from the spec WRT response data format. If SCSI version is 2861 * reported as zero like normal, then we make the following fixups: 2862 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2863 * modern device. 2864 * 2) Ensure response data format / ATAPI information are always correct. 2865 */ 2866 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2867 { 2868 u8 buf[4]; 2869 2870 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2871 if (buf[2] == 0) { 2872 buf[2] = 0x5; 2873 buf[3] = 0x32; 2874 } 2875 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2876 } 2877 2878 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2879 { 2880 struct scsi_cmnd *cmd = qc->scsicmd; 2881 unsigned int err_mask = qc->err_mask; 2882 2883 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2884 2885 /* handle completion from new EH */ 2886 if (unlikely(qc->ap->ops->error_handler && 2887 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2888 2889 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2890 /* FIXME: not quite right; we don't want the 2891 * translation of taskfile registers into a 2892 * sense descriptors, since that's only 2893 * correct for ATA, not ATAPI 2894 */ 2895 ata_gen_passthru_sense(qc); 2896 } 2897 2898 /* SCSI EH automatically locks door if sdev->locked is 2899 * set. Sometimes door lock request continues to 2900 * fail, for example, when no media is present. This 2901 * creates a loop - SCSI EH issues door lock which 2902 * fails and gets invoked again to acquire sense data 2903 * for the failed command. 2904 * 2905 * If door lock fails, always clear sdev->locked to 2906 * avoid this infinite loop. 2907 * 2908 * This may happen before SCSI scan is complete. Make 2909 * sure qc->dev->sdev isn't NULL before dereferencing. 2910 */ 2911 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2912 qc->dev->sdev->locked = 0; 2913 2914 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2915 ata_qc_done(qc); 2916 return; 2917 } 2918 2919 /* successful completion or old EH failure path */ 2920 if (unlikely(err_mask & AC_ERR_DEV)) { 2921 cmd->result = SAM_STAT_CHECK_CONDITION; 2922 atapi_request_sense(qc); 2923 return; 2924 } else if (unlikely(err_mask)) { 2925 /* FIXME: not quite right; we don't want the 2926 * translation of taskfile registers into 2927 * a sense descriptors, since that's only 2928 * correct for ATA, not ATAPI 2929 */ 2930 ata_gen_passthru_sense(qc); 2931 } else { 2932 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2933 atapi_fixup_inquiry(cmd); 2934 cmd->result = SAM_STAT_GOOD; 2935 } 2936 2937 ata_qc_done(qc); 2938 } 2939 /** 2940 * atapi_xlat - Initialize PACKET taskfile 2941 * @qc: command structure to be initialized 2942 * 2943 * LOCKING: 2944 * spin_lock_irqsave(host lock) 2945 * 2946 * RETURNS: 2947 * Zero on success, non-zero on failure. 2948 */ 2949 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2950 { 2951 struct scsi_cmnd *scmd = qc->scsicmd; 2952 struct ata_device *dev = qc->dev; 2953 int nodata = (scmd->sc_data_direction == DMA_NONE); 2954 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2955 unsigned int nbytes; 2956 2957 memset(qc->cdb, 0, dev->cdb_len); 2958 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2959 2960 qc->complete_fn = atapi_qc_complete; 2961 2962 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2963 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2964 qc->tf.flags |= ATA_TFLAG_WRITE; 2965 DPRINTK("direction: write\n"); 2966 } 2967 2968 qc->tf.command = ATA_CMD_PACKET; 2969 ata_qc_set_pc_nbytes(qc); 2970 2971 /* check whether ATAPI DMA is safe */ 2972 if (!nodata && !using_pio && atapi_check_dma(qc)) 2973 using_pio = 1; 2974 2975 /* Some controller variants snoop this value for Packet 2976 * transfers to do state machine and FIFO management. Thus we 2977 * want to set it properly, and for DMA where it is 2978 * effectively meaningless. 2979 */ 2980 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2981 2982 /* Most ATAPI devices which honor transfer chunk size don't 2983 * behave according to the spec when odd chunk size which 2984 * matches the transfer length is specified. If the number of 2985 * bytes to transfer is 2n+1. According to the spec, what 2986 * should happen is to indicate that 2n+1 is going to be 2987 * transferred and transfer 2n+2 bytes where the last byte is 2988 * padding. 2989 * 2990 * In practice, this doesn't happen. ATAPI devices first 2991 * indicate and transfer 2n bytes and then indicate and 2992 * transfer 2 bytes where the last byte is padding. 2993 * 2994 * This inconsistency confuses several controllers which 2995 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2996 * These controllers use actual number of transferred bytes to 2997 * update DMA pointer and transfer of 4n+2 bytes make those 2998 * controller push DMA pointer by 4n+4 bytes because SATA data 2999 * FISes are aligned to 4 bytes. This causes data corruption 3000 * and buffer overrun. 3001 * 3002 * Always setting nbytes to even number solves this problem 3003 * because then ATAPI devices don't have to split data at 2n 3004 * boundaries. 3005 */ 3006 if (nbytes & 0x1) 3007 nbytes++; 3008 3009 qc->tf.lbam = (nbytes & 0xFF); 3010 qc->tf.lbah = (nbytes >> 8); 3011 3012 if (nodata) 3013 qc->tf.protocol = ATAPI_PROT_NODATA; 3014 else if (using_pio) 3015 qc->tf.protocol = ATAPI_PROT_PIO; 3016 else { 3017 /* DMA data xfer */ 3018 qc->tf.protocol = ATAPI_PROT_DMA; 3019 qc->tf.feature |= ATAPI_PKT_DMA; 3020 3021 if ((dev->flags & ATA_DFLAG_DMADIR) && 3022 (scmd->sc_data_direction != DMA_TO_DEVICE)) 3023 /* some SATA bridges need us to indicate data xfer direction */ 3024 qc->tf.feature |= ATAPI_DMADIR; 3025 } 3026 3027 3028 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 3029 as ATAPI tape drives don't get this right otherwise */ 3030 return 0; 3031 } 3032 3033 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 3034 { 3035 if (!sata_pmp_attached(ap)) { 3036 if (likely(devno >= 0 && 3037 devno < ata_link_max_devices(&ap->link))) 3038 return &ap->link.device[devno]; 3039 } else { 3040 if (likely(devno >= 0 && 3041 devno < ap->nr_pmp_links)) 3042 return &ap->pmp_link[devno].device[0]; 3043 } 3044 3045 return NULL; 3046 } 3047 3048 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 3049 const struct scsi_device *scsidev) 3050 { 3051 int devno; 3052 3053 /* skip commands not addressed to targets we simulate */ 3054 if (!sata_pmp_attached(ap)) { 3055 if (unlikely(scsidev->channel || scsidev->lun)) 3056 return NULL; 3057 devno = scsidev->id; 3058 } else { 3059 if (unlikely(scsidev->id || scsidev->lun)) 3060 return NULL; 3061 devno = scsidev->channel; 3062 } 3063 3064 return ata_find_dev(ap, devno); 3065 } 3066 3067 /** 3068 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3069 * @ap: ATA port to which the device is attached 3070 * @scsidev: SCSI device from which we derive the ATA device 3071 * 3072 * Given various information provided in struct scsi_cmnd, 3073 * map that onto an ATA bus, and using that mapping 3074 * determine which ata_device is associated with the 3075 * SCSI command to be sent. 3076 * 3077 * LOCKING: 3078 * spin_lock_irqsave(host lock) 3079 * 3080 * RETURNS: 3081 * Associated ATA device, or %NULL if not found. 3082 */ 3083 static struct ata_device * 3084 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3085 { 3086 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3087 3088 if (unlikely(!dev || !ata_dev_enabled(dev))) 3089 return NULL; 3090 3091 return dev; 3092 } 3093 3094 /* 3095 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3096 * @byte1: Byte 1 from pass-thru CDB. 3097 * 3098 * RETURNS: 3099 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3100 */ 3101 static u8 3102 ata_scsi_map_proto(u8 byte1) 3103 { 3104 switch((byte1 & 0x1e) >> 1) { 3105 case 3: /* Non-data */ 3106 return ATA_PROT_NODATA; 3107 3108 case 6: /* DMA */ 3109 case 10: /* UDMA Data-in */ 3110 case 11: /* UDMA Data-Out */ 3111 return ATA_PROT_DMA; 3112 3113 case 4: /* PIO Data-in */ 3114 case 5: /* PIO Data-out */ 3115 return ATA_PROT_PIO; 3116 3117 case 12: /* FPDMA */ 3118 return ATA_PROT_NCQ; 3119 3120 case 0: /* Hard Reset */ 3121 case 1: /* SRST */ 3122 case 8: /* Device Diagnostic */ 3123 case 9: /* Device Reset */ 3124 case 7: /* DMA Queued */ 3125 case 15: /* Return Response Info */ 3126 default: /* Reserved */ 3127 break; 3128 } 3129 3130 return ATA_PROT_UNKNOWN; 3131 } 3132 3133 /** 3134 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3135 * @qc: command structure to be initialized 3136 * 3137 * Handles either 12, 16, or 32-byte versions of the CDB. 3138 * 3139 * RETURNS: 3140 * Zero on success, non-zero on failure. 3141 */ 3142 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3143 { 3144 struct ata_taskfile *tf = &(qc->tf); 3145 struct scsi_cmnd *scmd = qc->scsicmd; 3146 struct ata_device *dev = qc->dev; 3147 const u8 *cdb = scmd->cmnd; 3148 u16 fp; 3149 u16 cdb_offset = 0; 3150 3151 /* 7Fh variable length cmd means a ata pass-thru(32) */ 3152 if (cdb[0] == VARIABLE_LENGTH_CMD) 3153 cdb_offset = 9; 3154 3155 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 3156 if (tf->protocol == ATA_PROT_UNKNOWN) { 3157 fp = 1; 3158 goto invalid_fld; 3159 } 3160 3161 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0) 3162 tf->protocol = ATA_PROT_NCQ_NODATA; 3163 3164 /* enable LBA */ 3165 tf->flags |= ATA_TFLAG_LBA; 3166 3167 /* 3168 * 12 and 16 byte CDBs use different offsets to 3169 * provide the various register values. 3170 */ 3171 if (cdb[0] == ATA_16) { 3172 /* 3173 * 16-byte CDB - may contain extended commands. 3174 * 3175 * If that is the case, copy the upper byte register values. 3176 */ 3177 if (cdb[1] & 0x01) { 3178 tf->hob_feature = cdb[3]; 3179 tf->hob_nsect = cdb[5]; 3180 tf->hob_lbal = cdb[7]; 3181 tf->hob_lbam = cdb[9]; 3182 tf->hob_lbah = cdb[11]; 3183 tf->flags |= ATA_TFLAG_LBA48; 3184 } else 3185 tf->flags &= ~ATA_TFLAG_LBA48; 3186 3187 /* 3188 * Always copy low byte, device and command registers. 3189 */ 3190 tf->feature = cdb[4]; 3191 tf->nsect = cdb[6]; 3192 tf->lbal = cdb[8]; 3193 tf->lbam = cdb[10]; 3194 tf->lbah = cdb[12]; 3195 tf->device = cdb[13]; 3196 tf->command = cdb[14]; 3197 } else if (cdb[0] == ATA_12) { 3198 /* 3199 * 12-byte CDB - incapable of extended commands. 3200 */ 3201 tf->flags &= ~ATA_TFLAG_LBA48; 3202 3203 tf->feature = cdb[3]; 3204 tf->nsect = cdb[4]; 3205 tf->lbal = cdb[5]; 3206 tf->lbam = cdb[6]; 3207 tf->lbah = cdb[7]; 3208 tf->device = cdb[8]; 3209 tf->command = cdb[9]; 3210 } else { 3211 /* 3212 * 32-byte CDB - may contain extended command fields. 3213 * 3214 * If that is the case, copy the upper byte register values. 3215 */ 3216 if (cdb[10] & 0x01) { 3217 tf->hob_feature = cdb[20]; 3218 tf->hob_nsect = cdb[22]; 3219 tf->hob_lbal = cdb[16]; 3220 tf->hob_lbam = cdb[15]; 3221 tf->hob_lbah = cdb[14]; 3222 tf->flags |= ATA_TFLAG_LBA48; 3223 } else 3224 tf->flags &= ~ATA_TFLAG_LBA48; 3225 3226 tf->feature = cdb[21]; 3227 tf->nsect = cdb[23]; 3228 tf->lbal = cdb[19]; 3229 tf->lbam = cdb[18]; 3230 tf->lbah = cdb[17]; 3231 tf->device = cdb[24]; 3232 tf->command = cdb[25]; 3233 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3234 } 3235 3236 /* For NCQ commands copy the tag value */ 3237 if (ata_is_ncq(tf->protocol)) 3238 tf->nsect = qc->hw_tag << 3; 3239 3240 /* enforce correct master/slave bit */ 3241 tf->device = dev->devno ? 3242 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3243 3244 switch (tf->command) { 3245 /* READ/WRITE LONG use a non-standard sect_size */ 3246 case ATA_CMD_READ_LONG: 3247 case ATA_CMD_READ_LONG_ONCE: 3248 case ATA_CMD_WRITE_LONG: 3249 case ATA_CMD_WRITE_LONG_ONCE: 3250 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3251 fp = 1; 3252 goto invalid_fld; 3253 } 3254 qc->sect_size = scsi_bufflen(scmd); 3255 break; 3256 3257 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3258 case ATA_CMD_CFA_WRITE_NE: 3259 case ATA_CMD_CFA_TRANS_SECT: 3260 case ATA_CMD_CFA_WRITE_MULT_NE: 3261 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3262 case ATA_CMD_READ: 3263 case ATA_CMD_READ_EXT: 3264 case ATA_CMD_READ_QUEUED: 3265 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3266 case ATA_CMD_FPDMA_READ: 3267 case ATA_CMD_READ_MULTI: 3268 case ATA_CMD_READ_MULTI_EXT: 3269 case ATA_CMD_PIO_READ: 3270 case ATA_CMD_PIO_READ_EXT: 3271 case ATA_CMD_READ_STREAM_DMA_EXT: 3272 case ATA_CMD_READ_STREAM_EXT: 3273 case ATA_CMD_VERIFY: 3274 case ATA_CMD_VERIFY_EXT: 3275 case ATA_CMD_WRITE: 3276 case ATA_CMD_WRITE_EXT: 3277 case ATA_CMD_WRITE_FUA_EXT: 3278 case ATA_CMD_WRITE_QUEUED: 3279 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3280 case ATA_CMD_FPDMA_WRITE: 3281 case ATA_CMD_WRITE_MULTI: 3282 case ATA_CMD_WRITE_MULTI_EXT: 3283 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3284 case ATA_CMD_PIO_WRITE: 3285 case ATA_CMD_PIO_WRITE_EXT: 3286 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3287 case ATA_CMD_WRITE_STREAM_EXT: 3288 qc->sect_size = scmd->device->sector_size; 3289 break; 3290 3291 /* Everything else uses 512 byte "sectors" */ 3292 default: 3293 qc->sect_size = ATA_SECT_SIZE; 3294 } 3295 3296 /* 3297 * Set flags so that all registers will be written, pass on 3298 * write indication (used for PIO/DMA setup), result TF is 3299 * copied back and we don't whine too much about its failure. 3300 */ 3301 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3302 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3303 tf->flags |= ATA_TFLAG_WRITE; 3304 3305 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3306 3307 /* 3308 * Set transfer length. 3309 * 3310 * TODO: find out if we need to do more here to 3311 * cover scatter/gather case. 3312 */ 3313 ata_qc_set_pc_nbytes(qc); 3314 3315 /* We may not issue DMA commands if no DMA mode is set */ 3316 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3317 fp = 1; 3318 goto invalid_fld; 3319 } 3320 3321 /* We may not issue NCQ commands to devices not supporting NCQ */ 3322 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) { 3323 fp = 1; 3324 goto invalid_fld; 3325 } 3326 3327 /* sanity check for pio multi commands */ 3328 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3329 fp = 1; 3330 goto invalid_fld; 3331 } 3332 3333 if (is_multi_taskfile(tf)) { 3334 unsigned int multi_count = 1 << (cdb[1] >> 5); 3335 3336 /* compare the passed through multi_count 3337 * with the cached multi_count of libata 3338 */ 3339 if (multi_count != dev->multi_count) 3340 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3341 multi_count); 3342 } 3343 3344 /* 3345 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3346 * SET_FEATURES - XFER MODE must be preceded/succeeded 3347 * by an update to hardware-specific registers for each 3348 * controller (i.e. the reason for ->set_piomode(), 3349 * ->set_dmamode(), and ->post_set_mode() hooks). 3350 */ 3351 if (tf->command == ATA_CMD_SET_FEATURES && 3352 tf->feature == SETFEATURES_XFER) { 3353 fp = (cdb[0] == ATA_16) ? 4 : 3; 3354 goto invalid_fld; 3355 } 3356 3357 /* 3358 * Filter TPM commands by default. These provide an 3359 * essentially uncontrolled encrypted "back door" between 3360 * applications and the disk. Set libata.allow_tpm=1 if you 3361 * have a real reason for wanting to use them. This ensures 3362 * that installed software cannot easily mess stuff up without 3363 * user intent. DVR type users will probably ship with this enabled 3364 * for movie content management. 3365 * 3366 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3367 * for this and should do in future but that it is not sufficient as 3368 * DCS is an optional feature set. Thus we also do the software filter 3369 * so that we comply with the TC consortium stated goal that the user 3370 * can turn off TC features of their system. 3371 */ 3372 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3373 fp = (cdb[0] == ATA_16) ? 14 : 9; 3374 goto invalid_fld; 3375 } 3376 3377 return 0; 3378 3379 invalid_fld: 3380 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3381 return 1; 3382 } 3383 3384 /** 3385 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3386 * @cmd: SCSI command being translated 3387 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3388 * @sector: Starting sector 3389 * @count: Total Range of request in logical sectors 3390 * 3391 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3392 * descriptor. 3393 * 3394 * Upto 64 entries of the format: 3395 * 63:48 Range Length 3396 * 47:0 LBA 3397 * 3398 * Range Length of 0 is ignored. 3399 * LBA's should be sorted order and not overlap. 3400 * 3401 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3402 * 3403 * Return: Number of bytes copied into sglist. 3404 */ 3405 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3406 u64 sector, u32 count) 3407 { 3408 struct scsi_device *sdp = cmd->device; 3409 size_t len = sdp->sector_size; 3410 size_t r; 3411 __le64 *buf; 3412 u32 i = 0; 3413 unsigned long flags; 3414 3415 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3416 3417 if (len > ATA_SCSI_RBUF_SIZE) 3418 len = ATA_SCSI_RBUF_SIZE; 3419 3420 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3421 buf = ((void *)ata_scsi_rbuf); 3422 memset(buf, 0, len); 3423 while (i < trmax) { 3424 u64 entry = sector | 3425 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3426 buf[i++] = __cpu_to_le64(entry); 3427 if (count <= 0xffff) 3428 break; 3429 count -= 0xffff; 3430 sector += 0xffff; 3431 } 3432 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3433 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3434 3435 return r; 3436 } 3437 3438 /** 3439 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3440 * @qc: Command to be translated 3441 * 3442 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3443 * an SCT Write Same command. 3444 * Based on WRITE SAME has the UNMAP flag: 3445 * 3446 * - When set translate to DSM TRIM 3447 * - When clear translate to SCT Write Same 3448 */ 3449 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3450 { 3451 struct ata_taskfile *tf = &qc->tf; 3452 struct scsi_cmnd *scmd = qc->scsicmd; 3453 struct scsi_device *sdp = scmd->device; 3454 size_t len = sdp->sector_size; 3455 struct ata_device *dev = qc->dev; 3456 const u8 *cdb = scmd->cmnd; 3457 u64 block; 3458 u32 n_block; 3459 const u32 trmax = len >> 3; 3460 u32 size; 3461 u16 fp; 3462 u8 bp = 0xff; 3463 u8 unmap = cdb[1] & 0x8; 3464 3465 /* we may not issue DMA commands if no DMA mode is set */ 3466 if (unlikely(!dev->dma_mode)) 3467 goto invalid_opcode; 3468 3469 /* 3470 * We only allow sending this command through the block layer, 3471 * as it modifies the DATA OUT buffer, which would corrupt user 3472 * memory for SG_IO commands. 3473 */ 3474 if (unlikely(blk_rq_is_passthrough(scmd->request))) 3475 goto invalid_opcode; 3476 3477 if (unlikely(scmd->cmd_len < 16)) { 3478 fp = 15; 3479 goto invalid_fld; 3480 } 3481 scsi_16_lba_len(cdb, &block, &n_block); 3482 3483 if (!unmap || 3484 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3485 !ata_id_has_trim(dev->id)) { 3486 fp = 1; 3487 bp = 3; 3488 goto invalid_fld; 3489 } 3490 /* If the request is too large the cmd is invalid */ 3491 if (n_block > 0xffff * trmax) { 3492 fp = 2; 3493 goto invalid_fld; 3494 } 3495 3496 /* 3497 * WRITE SAME always has a sector sized buffer as payload, this 3498 * should never be a multiple entry S/G list. 3499 */ 3500 if (!scsi_sg_count(scmd)) 3501 goto invalid_param_len; 3502 3503 /* 3504 * size must match sector size in bytes 3505 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3506 * is defined as number of 512 byte blocks to be transferred. 3507 */ 3508 3509 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3510 if (size != len) 3511 goto invalid_param_len; 3512 3513 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3514 /* Newer devices support queued TRIM commands */ 3515 tf->protocol = ATA_PROT_NCQ; 3516 tf->command = ATA_CMD_FPDMA_SEND; 3517 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3518 tf->nsect = qc->hw_tag << 3; 3519 tf->hob_feature = (size / 512) >> 8; 3520 tf->feature = size / 512; 3521 3522 tf->auxiliary = 1; 3523 } else { 3524 tf->protocol = ATA_PROT_DMA; 3525 tf->hob_feature = 0; 3526 tf->feature = ATA_DSM_TRIM; 3527 tf->hob_nsect = (size / 512) >> 8; 3528 tf->nsect = size / 512; 3529 tf->command = ATA_CMD_DSM; 3530 } 3531 3532 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3533 ATA_TFLAG_WRITE; 3534 3535 ata_qc_set_pc_nbytes(qc); 3536 3537 return 0; 3538 3539 invalid_fld: 3540 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3541 return 1; 3542 invalid_param_len: 3543 /* "Parameter list length error" */ 3544 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3545 return 1; 3546 invalid_opcode: 3547 /* "Invalid command operation code" */ 3548 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3549 return 1; 3550 } 3551 3552 /** 3553 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3554 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3555 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3556 * 3557 * Yields a subset to satisfy scsi_report_opcode() 3558 * 3559 * LOCKING: 3560 * spin_lock_irqsave(host lock) 3561 */ 3562 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3563 { 3564 struct ata_device *dev = args->dev; 3565 u8 *cdb = args->cmd->cmnd; 3566 u8 supported = 0; 3567 unsigned int err = 0; 3568 3569 if (cdb[2] != 1) { 3570 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3571 err = 2; 3572 goto out; 3573 } 3574 switch (cdb[3]) { 3575 case INQUIRY: 3576 case MODE_SENSE: 3577 case MODE_SENSE_10: 3578 case READ_CAPACITY: 3579 case SERVICE_ACTION_IN_16: 3580 case REPORT_LUNS: 3581 case REQUEST_SENSE: 3582 case SYNCHRONIZE_CACHE: 3583 case REZERO_UNIT: 3584 case SEEK_6: 3585 case SEEK_10: 3586 case TEST_UNIT_READY: 3587 case SEND_DIAGNOSTIC: 3588 case MAINTENANCE_IN: 3589 case READ_6: 3590 case READ_10: 3591 case READ_16: 3592 case WRITE_6: 3593 case WRITE_10: 3594 case WRITE_16: 3595 case ATA_12: 3596 case ATA_16: 3597 case VERIFY: 3598 case VERIFY_16: 3599 case MODE_SELECT: 3600 case MODE_SELECT_10: 3601 case START_STOP: 3602 supported = 3; 3603 break; 3604 case ZBC_IN: 3605 case ZBC_OUT: 3606 if (ata_id_zoned_cap(dev->id) || 3607 dev->class == ATA_DEV_ZAC) 3608 supported = 3; 3609 break; 3610 case SECURITY_PROTOCOL_IN: 3611 case SECURITY_PROTOCOL_OUT: 3612 if (dev->flags & ATA_DFLAG_TRUSTED) 3613 supported = 3; 3614 break; 3615 default: 3616 break; 3617 } 3618 out: 3619 rbuf[1] = supported; /* supported */ 3620 return err; 3621 } 3622 3623 /** 3624 * ata_scsi_report_zones_complete - convert ATA output 3625 * @qc: command structure returning the data 3626 * 3627 * Convert T-13 little-endian field representation into 3628 * T-10 big-endian field representation. 3629 * What a mess. 3630 */ 3631 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3632 { 3633 struct scsi_cmnd *scmd = qc->scsicmd; 3634 struct sg_mapping_iter miter; 3635 unsigned long flags; 3636 unsigned int bytes = 0; 3637 3638 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3639 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3640 3641 local_irq_save(flags); 3642 while (sg_miter_next(&miter)) { 3643 unsigned int offset = 0; 3644 3645 if (bytes == 0) { 3646 char *hdr; 3647 u32 list_length; 3648 u64 max_lba, opt_lba; 3649 u16 same; 3650 3651 /* Swizzle header */ 3652 hdr = miter.addr; 3653 list_length = get_unaligned_le32(&hdr[0]); 3654 same = get_unaligned_le16(&hdr[4]); 3655 max_lba = get_unaligned_le64(&hdr[8]); 3656 opt_lba = get_unaligned_le64(&hdr[16]); 3657 put_unaligned_be32(list_length, &hdr[0]); 3658 hdr[4] = same & 0xf; 3659 put_unaligned_be64(max_lba, &hdr[8]); 3660 put_unaligned_be64(opt_lba, &hdr[16]); 3661 offset += 64; 3662 bytes += 64; 3663 } 3664 while (offset < miter.length) { 3665 char *rec; 3666 u8 cond, type, non_seq, reset; 3667 u64 size, start, wp; 3668 3669 /* Swizzle zone descriptor */ 3670 rec = miter.addr + offset; 3671 type = rec[0] & 0xf; 3672 cond = (rec[1] >> 4) & 0xf; 3673 non_seq = (rec[1] & 2); 3674 reset = (rec[1] & 1); 3675 size = get_unaligned_le64(&rec[8]); 3676 start = get_unaligned_le64(&rec[16]); 3677 wp = get_unaligned_le64(&rec[24]); 3678 rec[0] = type; 3679 rec[1] = (cond << 4) | non_seq | reset; 3680 put_unaligned_be64(size, &rec[8]); 3681 put_unaligned_be64(start, &rec[16]); 3682 put_unaligned_be64(wp, &rec[24]); 3683 WARN_ON(offset + 64 > miter.length); 3684 offset += 64; 3685 bytes += 64; 3686 } 3687 } 3688 sg_miter_stop(&miter); 3689 local_irq_restore(flags); 3690 3691 ata_scsi_qc_complete(qc); 3692 } 3693 3694 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3695 { 3696 struct ata_taskfile *tf = &qc->tf; 3697 struct scsi_cmnd *scmd = qc->scsicmd; 3698 const u8 *cdb = scmd->cmnd; 3699 u16 sect, fp = (u16)-1; 3700 u8 sa, options, bp = 0xff; 3701 u64 block; 3702 u32 n_block; 3703 3704 if (unlikely(scmd->cmd_len < 16)) { 3705 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3706 scmd->cmd_len); 3707 fp = 15; 3708 goto invalid_fld; 3709 } 3710 scsi_16_lba_len(cdb, &block, &n_block); 3711 if (n_block != scsi_bufflen(scmd)) { 3712 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3713 n_block, scsi_bufflen(scmd)); 3714 goto invalid_param_len; 3715 } 3716 sa = cdb[1] & 0x1f; 3717 if (sa != ZI_REPORT_ZONES) { 3718 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3719 fp = 1; 3720 goto invalid_fld; 3721 } 3722 /* 3723 * ZAC allows only for transfers in 512 byte blocks, 3724 * and uses a 16 bit value for the transfer count. 3725 */ 3726 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3727 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3728 goto invalid_param_len; 3729 } 3730 sect = n_block / 512; 3731 options = cdb[14] & 0xbf; 3732 3733 if (ata_ncq_enabled(qc->dev) && 3734 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3735 tf->protocol = ATA_PROT_NCQ; 3736 tf->command = ATA_CMD_FPDMA_RECV; 3737 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3738 tf->nsect = qc->hw_tag << 3; 3739 tf->feature = sect & 0xff; 3740 tf->hob_feature = (sect >> 8) & 0xff; 3741 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3742 } else { 3743 tf->command = ATA_CMD_ZAC_MGMT_IN; 3744 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3745 tf->protocol = ATA_PROT_DMA; 3746 tf->hob_feature = options; 3747 tf->hob_nsect = (sect >> 8) & 0xff; 3748 tf->nsect = sect & 0xff; 3749 } 3750 tf->device = ATA_LBA; 3751 tf->lbah = (block >> 16) & 0xff; 3752 tf->lbam = (block >> 8) & 0xff; 3753 tf->lbal = block & 0xff; 3754 tf->hob_lbah = (block >> 40) & 0xff; 3755 tf->hob_lbam = (block >> 32) & 0xff; 3756 tf->hob_lbal = (block >> 24) & 0xff; 3757 3758 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3759 qc->flags |= ATA_QCFLAG_RESULT_TF; 3760 3761 ata_qc_set_pc_nbytes(qc); 3762 3763 qc->complete_fn = ata_scsi_report_zones_complete; 3764 3765 return 0; 3766 3767 invalid_fld: 3768 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3769 return 1; 3770 3771 invalid_param_len: 3772 /* "Parameter list length error" */ 3773 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3774 return 1; 3775 } 3776 3777 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3778 { 3779 struct ata_taskfile *tf = &qc->tf; 3780 struct scsi_cmnd *scmd = qc->scsicmd; 3781 struct ata_device *dev = qc->dev; 3782 const u8 *cdb = scmd->cmnd; 3783 u8 all, sa; 3784 u64 block; 3785 u32 n_block; 3786 u16 fp = (u16)-1; 3787 3788 if (unlikely(scmd->cmd_len < 16)) { 3789 fp = 15; 3790 goto invalid_fld; 3791 } 3792 3793 sa = cdb[1] & 0x1f; 3794 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3795 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3796 fp = 1; 3797 goto invalid_fld; 3798 } 3799 3800 scsi_16_lba_len(cdb, &block, &n_block); 3801 if (n_block) { 3802 /* 3803 * ZAC MANAGEMENT OUT doesn't define any length 3804 */ 3805 goto invalid_param_len; 3806 } 3807 3808 all = cdb[14] & 0x1; 3809 if (all) { 3810 /* 3811 * Ignore the block address (zone ID) as defined by ZBC. 3812 */ 3813 block = 0; 3814 } else if (block >= dev->n_sectors) { 3815 /* 3816 * Block must be a valid zone ID (a zone start LBA). 3817 */ 3818 fp = 2; 3819 goto invalid_fld; 3820 } 3821 3822 if (ata_ncq_enabled(qc->dev) && 3823 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3824 tf->protocol = ATA_PROT_NCQ_NODATA; 3825 tf->command = ATA_CMD_NCQ_NON_DATA; 3826 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3827 tf->nsect = qc->hw_tag << 3; 3828 tf->auxiliary = sa | ((u16)all << 8); 3829 } else { 3830 tf->protocol = ATA_PROT_NODATA; 3831 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3832 tf->feature = sa; 3833 tf->hob_feature = all; 3834 } 3835 tf->lbah = (block >> 16) & 0xff; 3836 tf->lbam = (block >> 8) & 0xff; 3837 tf->lbal = block & 0xff; 3838 tf->hob_lbah = (block >> 40) & 0xff; 3839 tf->hob_lbam = (block >> 32) & 0xff; 3840 tf->hob_lbal = (block >> 24) & 0xff; 3841 tf->device = ATA_LBA; 3842 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3843 3844 return 0; 3845 3846 invalid_fld: 3847 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3848 return 1; 3849 invalid_param_len: 3850 /* "Parameter list length error" */ 3851 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3852 return 1; 3853 } 3854 3855 /** 3856 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3857 * @qc: Storage for translated ATA taskfile 3858 * @buf: input buffer 3859 * @len: number of valid bytes in the input buffer 3860 * @fp: out parameter for the failed field on error 3861 * 3862 * Prepare a taskfile to modify caching information for the device. 3863 * 3864 * LOCKING: 3865 * None. 3866 */ 3867 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3868 const u8 *buf, int len, u16 *fp) 3869 { 3870 struct ata_taskfile *tf = &qc->tf; 3871 struct ata_device *dev = qc->dev; 3872 u8 mpage[CACHE_MPAGE_LEN]; 3873 u8 wce; 3874 int i; 3875 3876 /* 3877 * The first two bytes of def_cache_mpage are a header, so offsets 3878 * in mpage are off by 2 compared to buf. Same for len. 3879 */ 3880 3881 if (len != CACHE_MPAGE_LEN - 2) { 3882 if (len < CACHE_MPAGE_LEN - 2) 3883 *fp = len; 3884 else 3885 *fp = CACHE_MPAGE_LEN - 2; 3886 return -EINVAL; 3887 } 3888 3889 wce = buf[0] & (1 << 2); 3890 3891 /* 3892 * Check that read-only bits are not modified. 3893 */ 3894 ata_msense_caching(dev->id, mpage, false); 3895 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3896 if (i == 0) 3897 continue; 3898 if (mpage[i + 2] != buf[i]) { 3899 *fp = i; 3900 return -EINVAL; 3901 } 3902 } 3903 3904 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3905 tf->protocol = ATA_PROT_NODATA; 3906 tf->nsect = 0; 3907 tf->command = ATA_CMD_SET_FEATURES; 3908 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3909 return 0; 3910 } 3911 3912 /** 3913 * ata_mselect_control - Simulate MODE SELECT for control page 3914 * @qc: Storage for translated ATA taskfile 3915 * @buf: input buffer 3916 * @len: number of valid bytes in the input buffer 3917 * @fp: out parameter for the failed field on error 3918 * 3919 * Prepare a taskfile to modify caching information for the device. 3920 * 3921 * LOCKING: 3922 * None. 3923 */ 3924 static int ata_mselect_control(struct ata_queued_cmd *qc, 3925 const u8 *buf, int len, u16 *fp) 3926 { 3927 struct ata_device *dev = qc->dev; 3928 u8 mpage[CONTROL_MPAGE_LEN]; 3929 u8 d_sense; 3930 int i; 3931 3932 /* 3933 * The first two bytes of def_control_mpage are a header, so offsets 3934 * in mpage are off by 2 compared to buf. Same for len. 3935 */ 3936 3937 if (len != CONTROL_MPAGE_LEN - 2) { 3938 if (len < CONTROL_MPAGE_LEN - 2) 3939 *fp = len; 3940 else 3941 *fp = CONTROL_MPAGE_LEN - 2; 3942 return -EINVAL; 3943 } 3944 3945 d_sense = buf[0] & (1 << 2); 3946 3947 /* 3948 * Check that read-only bits are not modified. 3949 */ 3950 ata_msense_control(dev, mpage, false); 3951 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3952 if (i == 0) 3953 continue; 3954 if (mpage[2 + i] != buf[i]) { 3955 *fp = i; 3956 return -EINVAL; 3957 } 3958 } 3959 if (d_sense & (1 << 2)) 3960 dev->flags |= ATA_DFLAG_D_SENSE; 3961 else 3962 dev->flags &= ~ATA_DFLAG_D_SENSE; 3963 return 0; 3964 } 3965 3966 /** 3967 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3968 * @qc: Storage for translated ATA taskfile 3969 * 3970 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3971 * Assume this is invoked for direct access devices (e.g. disks) only. 3972 * There should be no block descriptor for other device types. 3973 * 3974 * LOCKING: 3975 * spin_lock_irqsave(host lock) 3976 */ 3977 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3978 { 3979 struct scsi_cmnd *scmd = qc->scsicmd; 3980 const u8 *cdb = scmd->cmnd; 3981 const u8 *p; 3982 u8 pg, spg; 3983 unsigned six_byte, pg_len, hdr_len, bd_len; 3984 int len; 3985 u16 fp = (u16)-1; 3986 u8 bp = 0xff; 3987 3988 VPRINTK("ENTER\n"); 3989 3990 six_byte = (cdb[0] == MODE_SELECT); 3991 if (six_byte) { 3992 if (scmd->cmd_len < 5) { 3993 fp = 4; 3994 goto invalid_fld; 3995 } 3996 3997 len = cdb[4]; 3998 hdr_len = 4; 3999 } else { 4000 if (scmd->cmd_len < 9) { 4001 fp = 8; 4002 goto invalid_fld; 4003 } 4004 4005 len = (cdb[7] << 8) + cdb[8]; 4006 hdr_len = 8; 4007 } 4008 4009 /* We only support PF=1, SP=0. */ 4010 if ((cdb[1] & 0x11) != 0x10) { 4011 fp = 1; 4012 bp = (cdb[1] & 0x01) ? 1 : 5; 4013 goto invalid_fld; 4014 } 4015 4016 /* Test early for possible overrun. */ 4017 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 4018 goto invalid_param_len; 4019 4020 p = page_address(sg_page(scsi_sglist(scmd))); 4021 4022 /* Move past header and block descriptors. */ 4023 if (len < hdr_len) 4024 goto invalid_param_len; 4025 4026 if (six_byte) 4027 bd_len = p[3]; 4028 else 4029 bd_len = (p[6] << 8) + p[7]; 4030 4031 len -= hdr_len; 4032 p += hdr_len; 4033 if (len < bd_len) 4034 goto invalid_param_len; 4035 if (bd_len != 0 && bd_len != 8) { 4036 fp = (six_byte) ? 3 : 6; 4037 fp += bd_len + hdr_len; 4038 goto invalid_param; 4039 } 4040 4041 len -= bd_len; 4042 p += bd_len; 4043 if (len == 0) 4044 goto skip; 4045 4046 /* Parse both possible formats for the mode page headers. */ 4047 pg = p[0] & 0x3f; 4048 if (p[0] & 0x40) { 4049 if (len < 4) 4050 goto invalid_param_len; 4051 4052 spg = p[1]; 4053 pg_len = (p[2] << 8) | p[3]; 4054 p += 4; 4055 len -= 4; 4056 } else { 4057 if (len < 2) 4058 goto invalid_param_len; 4059 4060 spg = 0; 4061 pg_len = p[1]; 4062 p += 2; 4063 len -= 2; 4064 } 4065 4066 /* 4067 * No mode subpages supported (yet) but asking for _all_ 4068 * subpages may be valid 4069 */ 4070 if (spg && (spg != ALL_SUB_MPAGES)) { 4071 fp = (p[0] & 0x40) ? 1 : 0; 4072 fp += hdr_len + bd_len; 4073 goto invalid_param; 4074 } 4075 if (pg_len > len) 4076 goto invalid_param_len; 4077 4078 switch (pg) { 4079 case CACHE_MPAGE: 4080 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4081 fp += hdr_len + bd_len; 4082 goto invalid_param; 4083 } 4084 break; 4085 case CONTROL_MPAGE: 4086 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 4087 fp += hdr_len + bd_len; 4088 goto invalid_param; 4089 } else { 4090 goto skip; /* No ATA command to send */ 4091 } 4092 break; 4093 default: /* invalid page code */ 4094 fp = bd_len + hdr_len; 4095 goto invalid_param; 4096 } 4097 4098 /* 4099 * Only one page has changeable data, so we only support setting one 4100 * page at a time. 4101 */ 4102 if (len > pg_len) 4103 goto invalid_param; 4104 4105 return 0; 4106 4107 invalid_fld: 4108 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4109 return 1; 4110 4111 invalid_param: 4112 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4113 return 1; 4114 4115 invalid_param_len: 4116 /* "Parameter list length error" */ 4117 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4118 return 1; 4119 4120 skip: 4121 scmd->result = SAM_STAT_GOOD; 4122 return 1; 4123 } 4124 4125 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4126 { 4127 if (len == 0) 4128 return ATA_CMD_TRUSTED_NONDATA; 4129 else if (send) 4130 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4131 else 4132 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4133 } 4134 4135 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4136 { 4137 struct scsi_cmnd *scmd = qc->scsicmd; 4138 const u8 *cdb = scmd->cmnd; 4139 struct ata_taskfile *tf = &qc->tf; 4140 u8 secp = cdb[1]; 4141 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4142 u16 spsp = get_unaligned_be16(&cdb[2]); 4143 u32 len = get_unaligned_be32(&cdb[6]); 4144 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4145 4146 /* 4147 * We don't support the ATA "security" protocol. 4148 */ 4149 if (secp == 0xef) { 4150 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4151 return 1; 4152 } 4153 4154 if (cdb[4] & 7) { /* INC_512 */ 4155 if (len > 0xffff) { 4156 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4157 return 1; 4158 } 4159 } else { 4160 if (len > 0x01fffe00) { 4161 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4162 return 1; 4163 } 4164 4165 /* convert to the sector-based ATA addressing */ 4166 len = (len + 511) / 512; 4167 } 4168 4169 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4170 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4171 if (send) 4172 tf->flags |= ATA_TFLAG_WRITE; 4173 tf->command = ata_scsi_trusted_op(len, send, dma); 4174 tf->feature = secp; 4175 tf->lbam = spsp & 0xff; 4176 tf->lbah = spsp >> 8; 4177 4178 if (len) { 4179 tf->nsect = len & 0xff; 4180 tf->lbal = len >> 8; 4181 } else { 4182 if (!send) 4183 tf->lbah = (1 << 7); 4184 } 4185 4186 ata_qc_set_pc_nbytes(qc); 4187 return 0; 4188 } 4189 4190 /** 4191 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4192 * @qc: Command to be translated 4193 * 4194 * Translate a SCSI variable length CDB to specified commands. 4195 * It checks a service action value in CDB to call corresponding handler. 4196 * 4197 * RETURNS: 4198 * Zero on success, non-zero on failure 4199 * 4200 */ 4201 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4202 { 4203 struct scsi_cmnd *scmd = qc->scsicmd; 4204 const u8 *cdb = scmd->cmnd; 4205 const u16 sa = get_unaligned_be16(&cdb[8]); 4206 4207 /* 4208 * if service action represents a ata pass-thru(32) command, 4209 * then pass it to ata_scsi_pass_thru handler. 4210 */ 4211 if (sa == ATA_32) 4212 return ata_scsi_pass_thru(qc); 4213 4214 /* unsupported service action */ 4215 return 1; 4216 } 4217 4218 /** 4219 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4220 * @dev: ATA device 4221 * @cmd: SCSI command opcode to consider 4222 * 4223 * Look up the SCSI command given, and determine whether the 4224 * SCSI command is to be translated or simulated. 4225 * 4226 * RETURNS: 4227 * Pointer to translation function if possible, %NULL if not. 4228 */ 4229 4230 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4231 { 4232 switch (cmd) { 4233 case READ_6: 4234 case READ_10: 4235 case READ_16: 4236 4237 case WRITE_6: 4238 case WRITE_10: 4239 case WRITE_16: 4240 return ata_scsi_rw_xlat; 4241 4242 case WRITE_SAME_16: 4243 return ata_scsi_write_same_xlat; 4244 4245 case SYNCHRONIZE_CACHE: 4246 if (ata_try_flush_cache(dev)) 4247 return ata_scsi_flush_xlat; 4248 break; 4249 4250 case VERIFY: 4251 case VERIFY_16: 4252 return ata_scsi_verify_xlat; 4253 4254 case ATA_12: 4255 case ATA_16: 4256 return ata_scsi_pass_thru; 4257 4258 case VARIABLE_LENGTH_CMD: 4259 return ata_scsi_var_len_cdb_xlat; 4260 4261 case MODE_SELECT: 4262 case MODE_SELECT_10: 4263 return ata_scsi_mode_select_xlat; 4264 break; 4265 4266 case ZBC_IN: 4267 return ata_scsi_zbc_in_xlat; 4268 4269 case ZBC_OUT: 4270 return ata_scsi_zbc_out_xlat; 4271 4272 case SECURITY_PROTOCOL_IN: 4273 case SECURITY_PROTOCOL_OUT: 4274 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4275 break; 4276 return ata_scsi_security_inout_xlat; 4277 4278 case START_STOP: 4279 return ata_scsi_start_stop_xlat; 4280 } 4281 4282 return NULL; 4283 } 4284 4285 /** 4286 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 4287 * @ap: ATA port to which the command was being sent 4288 * @cmd: SCSI command to dump 4289 * 4290 * Prints the contents of a SCSI command via printk(). 4291 */ 4292 4293 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 4294 struct scsi_cmnd *cmd) 4295 { 4296 #ifdef ATA_VERBOSE_DEBUG 4297 struct scsi_device *scsidev = cmd->device; 4298 4299 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n", 4300 ap->print_id, 4301 scsidev->channel, scsidev->id, scsidev->lun, 4302 cmd->cmnd); 4303 #endif 4304 } 4305 4306 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 4307 struct ata_device *dev) 4308 { 4309 u8 scsi_op = scmd->cmnd[0]; 4310 ata_xlat_func_t xlat_func; 4311 int rc = 0; 4312 4313 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4314 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 4315 goto bad_cdb_len; 4316 4317 xlat_func = ata_get_xlat_func(dev, scsi_op); 4318 } else { 4319 if (unlikely(!scmd->cmd_len)) 4320 goto bad_cdb_len; 4321 4322 xlat_func = NULL; 4323 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4324 /* relay SCSI command to ATAPI device */ 4325 int len = COMMAND_SIZE(scsi_op); 4326 if (unlikely(len > scmd->cmd_len || 4327 len > dev->cdb_len || 4328 scmd->cmd_len > ATAPI_CDB_LEN)) 4329 goto bad_cdb_len; 4330 4331 xlat_func = atapi_xlat; 4332 } else { 4333 /* ATA_16 passthru, treat as an ATA command */ 4334 if (unlikely(scmd->cmd_len > 16)) 4335 goto bad_cdb_len; 4336 4337 xlat_func = ata_get_xlat_func(dev, scsi_op); 4338 } 4339 } 4340 4341 if (xlat_func) 4342 rc = ata_scsi_translate(dev, scmd, xlat_func); 4343 else 4344 ata_scsi_simulate(dev, scmd); 4345 4346 return rc; 4347 4348 bad_cdb_len: 4349 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4350 scmd->cmd_len, scsi_op, dev->cdb_len); 4351 scmd->result = DID_ERROR << 16; 4352 scmd->scsi_done(scmd); 4353 return 0; 4354 } 4355 4356 /** 4357 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4358 * @shost: SCSI host of command to be sent 4359 * @cmd: SCSI command to be sent 4360 * 4361 * In some cases, this function translates SCSI commands into 4362 * ATA taskfiles, and queues the taskfiles to be sent to 4363 * hardware. In other cases, this function simulates a 4364 * SCSI device by evaluating and responding to certain 4365 * SCSI commands. This creates the overall effect of 4366 * ATA and ATAPI devices appearing as SCSI devices. 4367 * 4368 * LOCKING: 4369 * ATA host lock 4370 * 4371 * RETURNS: 4372 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4373 * 0 otherwise. 4374 */ 4375 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4376 { 4377 struct ata_port *ap; 4378 struct ata_device *dev; 4379 struct scsi_device *scsidev = cmd->device; 4380 int rc = 0; 4381 unsigned long irq_flags; 4382 4383 ap = ata_shost_to_port(shost); 4384 4385 spin_lock_irqsave(ap->lock, irq_flags); 4386 4387 ata_scsi_dump_cdb(ap, cmd); 4388 4389 dev = ata_scsi_find_dev(ap, scsidev); 4390 if (likely(dev)) 4391 rc = __ata_scsi_queuecmd(cmd, dev); 4392 else { 4393 cmd->result = (DID_BAD_TARGET << 16); 4394 cmd->scsi_done(cmd); 4395 } 4396 4397 spin_unlock_irqrestore(ap->lock, irq_flags); 4398 4399 return rc; 4400 } 4401 4402 /** 4403 * ata_scsi_simulate - simulate SCSI command on ATA device 4404 * @dev: the target device 4405 * @cmd: SCSI command being sent to device. 4406 * 4407 * Interprets and directly executes a select list of SCSI commands 4408 * that can be handled internally. 4409 * 4410 * LOCKING: 4411 * spin_lock_irqsave(host lock) 4412 */ 4413 4414 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4415 { 4416 struct ata_scsi_args args; 4417 const u8 *scsicmd = cmd->cmnd; 4418 u8 tmp8; 4419 4420 args.dev = dev; 4421 args.id = dev->id; 4422 args.cmd = cmd; 4423 4424 switch(scsicmd[0]) { 4425 case INQUIRY: 4426 if (scsicmd[1] & 2) /* is CmdDt set? */ 4427 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4428 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4429 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4430 else switch (scsicmd[2]) { 4431 case 0x00: 4432 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4433 break; 4434 case 0x80: 4435 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4436 break; 4437 case 0x83: 4438 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4439 break; 4440 case 0x89: 4441 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4442 break; 4443 case 0xb0: 4444 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4445 break; 4446 case 0xb1: 4447 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4448 break; 4449 case 0xb2: 4450 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4451 break; 4452 case 0xb6: 4453 if (dev->flags & ATA_DFLAG_ZAC) { 4454 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4455 break; 4456 } 4457 /* Fallthrough */ 4458 default: 4459 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4460 break; 4461 } 4462 break; 4463 4464 case MODE_SENSE: 4465 case MODE_SENSE_10: 4466 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4467 break; 4468 4469 case READ_CAPACITY: 4470 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4471 break; 4472 4473 case SERVICE_ACTION_IN_16: 4474 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4475 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4476 else 4477 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4478 break; 4479 4480 case REPORT_LUNS: 4481 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4482 break; 4483 4484 case REQUEST_SENSE: 4485 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4486 cmd->result = (DRIVER_SENSE << 24); 4487 break; 4488 4489 /* if we reach this, then writeback caching is disabled, 4490 * turning this into a no-op. 4491 */ 4492 case SYNCHRONIZE_CACHE: 4493 /* fall through */ 4494 4495 /* no-op's, complete with success */ 4496 case REZERO_UNIT: 4497 case SEEK_6: 4498 case SEEK_10: 4499 case TEST_UNIT_READY: 4500 break; 4501 4502 case SEND_DIAGNOSTIC: 4503 tmp8 = scsicmd[1] & ~(1 << 3); 4504 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4505 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4506 break; 4507 4508 case MAINTENANCE_IN: 4509 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4510 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4511 else 4512 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4513 break; 4514 4515 /* all other commands */ 4516 default: 4517 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4518 /* "Invalid command operation code" */ 4519 break; 4520 } 4521 4522 cmd->scsi_done(cmd); 4523 } 4524 4525 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4526 { 4527 int i, rc; 4528 4529 for (i = 0; i < host->n_ports; i++) { 4530 struct ata_port *ap = host->ports[i]; 4531 struct Scsi_Host *shost; 4532 4533 rc = -ENOMEM; 4534 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4535 if (!shost) 4536 goto err_alloc; 4537 4538 shost->eh_noresume = 1; 4539 *(struct ata_port **)&shost->hostdata[0] = ap; 4540 ap->scsi_host = shost; 4541 4542 shost->transportt = ata_scsi_transport_template; 4543 shost->unique_id = ap->print_id; 4544 shost->max_id = 16; 4545 shost->max_lun = 1; 4546 shost->max_channel = 1; 4547 shost->max_cmd_len = 32; 4548 4549 /* Schedule policy is determined by ->qc_defer() 4550 * callback and it needs to see every deferred qc. 4551 * Set host_blocked to 1 to prevent SCSI midlayer from 4552 * automatically deferring requests. 4553 */ 4554 shost->max_host_blocked = 1; 4555 4556 rc = scsi_add_host_with_dma(ap->scsi_host, 4557 &ap->tdev, ap->host->dev); 4558 if (rc) 4559 goto err_add; 4560 } 4561 4562 return 0; 4563 4564 err_add: 4565 scsi_host_put(host->ports[i]->scsi_host); 4566 err_alloc: 4567 while (--i >= 0) { 4568 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4569 4570 scsi_remove_host(shost); 4571 scsi_host_put(shost); 4572 } 4573 return rc; 4574 } 4575 4576 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4577 { 4578 int tries = 5; 4579 struct ata_device *last_failed_dev = NULL; 4580 struct ata_link *link; 4581 struct ata_device *dev; 4582 4583 repeat: 4584 ata_for_each_link(link, ap, EDGE) { 4585 ata_for_each_dev(dev, link, ENABLED) { 4586 struct scsi_device *sdev; 4587 int channel = 0, id = 0; 4588 4589 if (dev->sdev) 4590 continue; 4591 4592 if (ata_is_host_link(link)) 4593 id = dev->devno; 4594 else 4595 channel = link->pmp; 4596 4597 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4598 NULL); 4599 if (!IS_ERR(sdev)) { 4600 dev->sdev = sdev; 4601 scsi_device_put(sdev); 4602 } else { 4603 dev->sdev = NULL; 4604 } 4605 } 4606 } 4607 4608 /* If we scanned while EH was in progress or allocation 4609 * failure occurred, scan would have failed silently. Check 4610 * whether all devices are attached. 4611 */ 4612 ata_for_each_link(link, ap, EDGE) { 4613 ata_for_each_dev(dev, link, ENABLED) { 4614 if (!dev->sdev) 4615 goto exit_loop; 4616 } 4617 } 4618 exit_loop: 4619 if (!link) 4620 return; 4621 4622 /* we're missing some SCSI devices */ 4623 if (sync) { 4624 /* If caller requested synchrnous scan && we've made 4625 * any progress, sleep briefly and repeat. 4626 */ 4627 if (dev != last_failed_dev) { 4628 msleep(100); 4629 last_failed_dev = dev; 4630 goto repeat; 4631 } 4632 4633 /* We might be failing to detect boot device, give it 4634 * a few more chances. 4635 */ 4636 if (--tries) { 4637 msleep(100); 4638 goto repeat; 4639 } 4640 4641 ata_port_err(ap, 4642 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4643 } 4644 4645 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4646 round_jiffies_relative(HZ)); 4647 } 4648 4649 /** 4650 * ata_scsi_offline_dev - offline attached SCSI device 4651 * @dev: ATA device to offline attached SCSI device for 4652 * 4653 * This function is called from ata_eh_hotplug() and responsible 4654 * for taking the SCSI device attached to @dev offline. This 4655 * function is called with host lock which protects dev->sdev 4656 * against clearing. 4657 * 4658 * LOCKING: 4659 * spin_lock_irqsave(host lock) 4660 * 4661 * RETURNS: 4662 * 1 if attached SCSI device exists, 0 otherwise. 4663 */ 4664 int ata_scsi_offline_dev(struct ata_device *dev) 4665 { 4666 if (dev->sdev) { 4667 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4668 return 1; 4669 } 4670 return 0; 4671 } 4672 4673 /** 4674 * ata_scsi_remove_dev - remove attached SCSI device 4675 * @dev: ATA device to remove attached SCSI device for 4676 * 4677 * This function is called from ata_eh_scsi_hotplug() and 4678 * responsible for removing the SCSI device attached to @dev. 4679 * 4680 * LOCKING: 4681 * Kernel thread context (may sleep). 4682 */ 4683 static void ata_scsi_remove_dev(struct ata_device *dev) 4684 { 4685 struct ata_port *ap = dev->link->ap; 4686 struct scsi_device *sdev; 4687 unsigned long flags; 4688 4689 /* Alas, we need to grab scan_mutex to ensure SCSI device 4690 * state doesn't change underneath us and thus 4691 * scsi_device_get() always succeeds. The mutex locking can 4692 * be removed if there is __scsi_device_get() interface which 4693 * increments reference counts regardless of device state. 4694 */ 4695 mutex_lock(&ap->scsi_host->scan_mutex); 4696 spin_lock_irqsave(ap->lock, flags); 4697 4698 /* clearing dev->sdev is protected by host lock */ 4699 sdev = dev->sdev; 4700 dev->sdev = NULL; 4701 4702 if (sdev) { 4703 /* If user initiated unplug races with us, sdev can go 4704 * away underneath us after the host lock and 4705 * scan_mutex are released. Hold onto it. 4706 */ 4707 if (scsi_device_get(sdev) == 0) { 4708 /* The following ensures the attached sdev is 4709 * offline on return from ata_scsi_offline_dev() 4710 * regardless it wins or loses the race 4711 * against this function. 4712 */ 4713 scsi_device_set_state(sdev, SDEV_OFFLINE); 4714 } else { 4715 WARN_ON(1); 4716 sdev = NULL; 4717 } 4718 } 4719 4720 spin_unlock_irqrestore(ap->lock, flags); 4721 mutex_unlock(&ap->scsi_host->scan_mutex); 4722 4723 if (sdev) { 4724 ata_dev_info(dev, "detaching (SCSI %s)\n", 4725 dev_name(&sdev->sdev_gendev)); 4726 4727 scsi_remove_device(sdev); 4728 scsi_device_put(sdev); 4729 } 4730 } 4731 4732 static void ata_scsi_handle_link_detach(struct ata_link *link) 4733 { 4734 struct ata_port *ap = link->ap; 4735 struct ata_device *dev; 4736 4737 ata_for_each_dev(dev, link, ALL) { 4738 unsigned long flags; 4739 4740 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4741 continue; 4742 4743 spin_lock_irqsave(ap->lock, flags); 4744 dev->flags &= ~ATA_DFLAG_DETACHED; 4745 spin_unlock_irqrestore(ap->lock, flags); 4746 4747 if (zpodd_dev_enabled(dev)) 4748 zpodd_exit(dev); 4749 4750 ata_scsi_remove_dev(dev); 4751 } 4752 } 4753 4754 /** 4755 * ata_scsi_media_change_notify - send media change event 4756 * @dev: Pointer to the disk device with media change event 4757 * 4758 * Tell the block layer to send a media change notification 4759 * event. 4760 * 4761 * LOCKING: 4762 * spin_lock_irqsave(host lock) 4763 */ 4764 void ata_scsi_media_change_notify(struct ata_device *dev) 4765 { 4766 if (dev->sdev) 4767 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4768 GFP_ATOMIC); 4769 } 4770 4771 /** 4772 * ata_scsi_hotplug - SCSI part of hotplug 4773 * @work: Pointer to ATA port to perform SCSI hotplug on 4774 * 4775 * Perform SCSI part of hotplug. It's executed from a separate 4776 * workqueue after EH completes. This is necessary because SCSI 4777 * hot plugging requires working EH and hot unplugging is 4778 * synchronized with hot plugging with a mutex. 4779 * 4780 * LOCKING: 4781 * Kernel thread context (may sleep). 4782 */ 4783 void ata_scsi_hotplug(struct work_struct *work) 4784 { 4785 struct ata_port *ap = 4786 container_of(work, struct ata_port, hotplug_task.work); 4787 int i; 4788 4789 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4790 DPRINTK("ENTER/EXIT - unloading\n"); 4791 return; 4792 } 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