1 /* 2 * libata-scsi.c - helper library for ATA 3 * 4 * Maintained by: Tejun Heo <tj@kernel.org> 5 * Please ALWAYS copy linux-ide@vger.kernel.org 6 * on emails. 7 * 8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 9 * Copyright 2003-2004 Jeff Garzik 10 * 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2, or (at your option) 15 * any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; see the file COPYING. If not, write to 24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 25 * 26 * 27 * libata documentation is available via 'make {ps|pdf}docs', 28 * as Documentation/driver-api/libata.rst 29 * 30 * Hardware documentation available from 31 * - http://www.t10.org/ 32 * - http://www.t13.org/ 33 * 34 */ 35 36 #include <linux/slab.h> 37 #include <linux/kernel.h> 38 #include <linux/blkdev.h> 39 #include <linux/spinlock.h> 40 #include <linux/export.h> 41 #include <scsi/scsi.h> 42 #include <scsi/scsi_host.h> 43 #include <scsi/scsi_cmnd.h> 44 #include <scsi/scsi_eh.h> 45 #include <scsi/scsi_device.h> 46 #include <scsi/scsi_tcq.h> 47 #include <scsi/scsi_transport.h> 48 #include <linux/libata.h> 49 #include <linux/hdreg.h> 50 #include <linux/uaccess.h> 51 #include <linux/suspend.h> 52 #include <asm/unaligned.h> 53 #include <linux/ioprio.h> 54 55 #include "libata.h" 56 #include "libata-transport.h" 57 58 #define ATA_SCSI_RBUF_SIZE 4096 59 60 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 61 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 62 63 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 64 65 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 66 const struct scsi_device *scsidev); 67 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, 68 const struct scsi_device *scsidev); 69 70 #define RW_RECOVERY_MPAGE 0x1 71 #define RW_RECOVERY_MPAGE_LEN 12 72 #define CACHE_MPAGE 0x8 73 #define CACHE_MPAGE_LEN 20 74 #define CONTROL_MPAGE 0xa 75 #define CONTROL_MPAGE_LEN 12 76 #define ALL_MPAGES 0x3f 77 #define ALL_SUB_MPAGES 0xff 78 79 80 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 81 RW_RECOVERY_MPAGE, 82 RW_RECOVERY_MPAGE_LEN - 2, 83 (1 << 7), /* AWRE */ 84 0, /* read retry count */ 85 0, 0, 0, 0, 86 0, /* write retry count */ 87 0, 0, 0 88 }; 89 90 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 91 CACHE_MPAGE, 92 CACHE_MPAGE_LEN - 2, 93 0, /* contains WCE, needs to be 0 for logic */ 94 0, 0, 0, 0, 0, 0, 0, 0, 0, 95 0, /* contains DRA, needs to be 0 for logic */ 96 0, 0, 0, 0, 0, 0, 0 97 }; 98 99 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 100 CONTROL_MPAGE, 101 CONTROL_MPAGE_LEN - 2, 102 2, /* DSENSE=0, GLTSD=1 */ 103 0, /* [QAM+QERR may be 1, see 05-359r1] */ 104 0, 0, 0, 0, 0xff, 0xff, 105 0, 30 /* extended self test time, see 05-359r1 */ 106 }; 107 108 static const char *ata_lpm_policy_names[] = { 109 [ATA_LPM_UNKNOWN] = "max_performance", 110 [ATA_LPM_MAX_POWER] = "max_performance", 111 [ATA_LPM_MED_POWER] = "medium_power", 112 [ATA_LPM_MED_POWER_WITH_DIPM] = "med_power_with_dipm", 113 [ATA_LPM_MIN_POWER] = "min_power", 114 }; 115 116 static ssize_t ata_scsi_lpm_store(struct device *device, 117 struct device_attribute *attr, 118 const char *buf, size_t count) 119 { 120 struct Scsi_Host *shost = class_to_shost(device); 121 struct ata_port *ap = ata_shost_to_port(shost); 122 struct ata_link *link; 123 struct ata_device *dev; 124 enum ata_lpm_policy policy; 125 unsigned long flags; 126 127 /* UNKNOWN is internal state, iterate from MAX_POWER */ 128 for (policy = ATA_LPM_MAX_POWER; 129 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) { 130 const char *name = ata_lpm_policy_names[policy]; 131 132 if (strncmp(name, buf, strlen(name)) == 0) 133 break; 134 } 135 if (policy == ARRAY_SIZE(ata_lpm_policy_names)) 136 return -EINVAL; 137 138 spin_lock_irqsave(ap->lock, flags); 139 140 ata_for_each_link(link, ap, EDGE) { 141 ata_for_each_dev(dev, &ap->link, ENABLED) { 142 if (dev->horkage & ATA_HORKAGE_NOLPM) { 143 count = -EOPNOTSUPP; 144 goto out_unlock; 145 } 146 } 147 } 148 149 ap->target_lpm_policy = policy; 150 ata_port_schedule_eh(ap); 151 out_unlock: 152 spin_unlock_irqrestore(ap->lock, flags); 153 return count; 154 } 155 156 static ssize_t ata_scsi_lpm_show(struct device *dev, 157 struct device_attribute *attr, char *buf) 158 { 159 struct Scsi_Host *shost = class_to_shost(dev); 160 struct ata_port *ap = ata_shost_to_port(shost); 161 162 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names)) 163 return -EINVAL; 164 165 return snprintf(buf, PAGE_SIZE, "%s\n", 166 ata_lpm_policy_names[ap->target_lpm_policy]); 167 } 168 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, 169 ata_scsi_lpm_show, ata_scsi_lpm_store); 170 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); 171 172 static ssize_t ata_scsi_park_show(struct device *device, 173 struct device_attribute *attr, char *buf) 174 { 175 struct scsi_device *sdev = to_scsi_device(device); 176 struct ata_port *ap; 177 struct ata_link *link; 178 struct ata_device *dev; 179 unsigned long now; 180 unsigned int uninitialized_var(msecs); 181 int rc = 0; 182 183 ap = ata_shost_to_port(sdev->host); 184 185 spin_lock_irq(ap->lock); 186 dev = ata_scsi_find_dev(ap, sdev); 187 if (!dev) { 188 rc = -ENODEV; 189 goto unlock; 190 } 191 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 192 rc = -EOPNOTSUPP; 193 goto unlock; 194 } 195 196 link = dev->link; 197 now = jiffies; 198 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 199 link->eh_context.unloaded_mask & (1 << dev->devno) && 200 time_after(dev->unpark_deadline, now)) 201 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 202 else 203 msecs = 0; 204 205 unlock: 206 spin_unlock_irq(ap->lock); 207 208 return rc ? rc : snprintf(buf, 20, "%u\n", msecs); 209 } 210 211 static ssize_t ata_scsi_park_store(struct device *device, 212 struct device_attribute *attr, 213 const char *buf, size_t len) 214 { 215 struct scsi_device *sdev = to_scsi_device(device); 216 struct ata_port *ap; 217 struct ata_device *dev; 218 long int input; 219 unsigned long flags; 220 int rc; 221 222 rc = kstrtol(buf, 10, &input); 223 if (rc) 224 return rc; 225 if (input < -2) 226 return -EINVAL; 227 if (input > ATA_TMOUT_MAX_PARK) { 228 rc = -EOVERFLOW; 229 input = ATA_TMOUT_MAX_PARK; 230 } 231 232 ap = ata_shost_to_port(sdev->host); 233 234 spin_lock_irqsave(ap->lock, flags); 235 dev = ata_scsi_find_dev(ap, sdev); 236 if (unlikely(!dev)) { 237 rc = -ENODEV; 238 goto unlock; 239 } 240 if (dev->class != ATA_DEV_ATA && 241 dev->class != ATA_DEV_ZAC) { 242 rc = -EOPNOTSUPP; 243 goto unlock; 244 } 245 246 if (input >= 0) { 247 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 248 rc = -EOPNOTSUPP; 249 goto unlock; 250 } 251 252 dev->unpark_deadline = ata_deadline(jiffies, input); 253 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 254 ata_port_schedule_eh(ap); 255 complete(&ap->park_req_pending); 256 } else { 257 switch (input) { 258 case -1: 259 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 260 break; 261 case -2: 262 dev->flags |= ATA_DFLAG_NO_UNLOAD; 263 break; 264 } 265 } 266 unlock: 267 spin_unlock_irqrestore(ap->lock, flags); 268 269 return rc ? rc : len; 270 } 271 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 272 ata_scsi_park_show, ata_scsi_park_store); 273 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 274 275 static ssize_t ata_ncq_prio_enable_show(struct device *device, 276 struct device_attribute *attr, 277 char *buf) 278 { 279 struct scsi_device *sdev = to_scsi_device(device); 280 struct ata_port *ap; 281 struct ata_device *dev; 282 bool ncq_prio_enable; 283 int rc = 0; 284 285 ap = ata_shost_to_port(sdev->host); 286 287 spin_lock_irq(ap->lock); 288 dev = ata_scsi_find_dev(ap, sdev); 289 if (!dev) { 290 rc = -ENODEV; 291 goto unlock; 292 } 293 294 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE; 295 296 unlock: 297 spin_unlock_irq(ap->lock); 298 299 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable); 300 } 301 302 static ssize_t ata_ncq_prio_enable_store(struct device *device, 303 struct device_attribute *attr, 304 const char *buf, size_t len) 305 { 306 struct scsi_device *sdev = to_scsi_device(device); 307 struct ata_port *ap; 308 struct ata_device *dev; 309 long int input; 310 int rc; 311 312 rc = kstrtol(buf, 10, &input); 313 if (rc) 314 return rc; 315 if ((input < 0) || (input > 1)) 316 return -EINVAL; 317 318 ap = ata_shost_to_port(sdev->host); 319 dev = ata_scsi_find_dev(ap, sdev); 320 if (unlikely(!dev)) 321 return -ENODEV; 322 323 spin_lock_irq(ap->lock); 324 if (input) 325 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE; 326 else 327 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; 328 329 dev->link->eh_info.action |= ATA_EH_REVALIDATE; 330 dev->link->eh_info.flags |= ATA_EHI_QUIET; 331 ata_port_schedule_eh(ap); 332 spin_unlock_irq(ap->lock); 333 334 ata_port_wait_eh(ap); 335 336 if (input) { 337 spin_lock_irq(ap->lock); 338 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) { 339 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; 340 rc = -EIO; 341 } 342 spin_unlock_irq(ap->lock); 343 } 344 345 return rc ? rc : len; 346 } 347 348 DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR, 349 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store); 350 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable); 351 352 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 353 u8 sk, u8 asc, u8 ascq) 354 { 355 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 356 357 if (!cmd) 358 return; 359 360 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 361 362 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq); 363 } 364 365 void ata_scsi_set_sense_information(struct ata_device *dev, 366 struct scsi_cmnd *cmd, 367 const struct ata_taskfile *tf) 368 { 369 u64 information; 370 371 if (!cmd) 372 return; 373 374 information = ata_tf_read_block(tf, dev); 375 if (information == U64_MAX) 376 return; 377 378 scsi_set_sense_information(cmd->sense_buffer, 379 SCSI_SENSE_BUFFERSIZE, information); 380 } 381 382 static void ata_scsi_set_invalid_field(struct ata_device *dev, 383 struct scsi_cmnd *cmd, u16 field, u8 bit) 384 { 385 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 386 /* "Invalid field in CDB" */ 387 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 388 field, bit, 1); 389 } 390 391 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 392 struct scsi_cmnd *cmd, u16 field) 393 { 394 /* "Invalid field in parameter list" */ 395 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 396 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 397 field, 0xff, 0); 398 } 399 400 static ssize_t 401 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, 402 const char *buf, size_t count) 403 { 404 struct Scsi_Host *shost = class_to_shost(dev); 405 struct ata_port *ap = ata_shost_to_port(shost); 406 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) 407 return ap->ops->em_store(ap, buf, count); 408 return -EINVAL; 409 } 410 411 static ssize_t 412 ata_scsi_em_message_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 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) 419 return ap->ops->em_show(ap, buf); 420 return -EINVAL; 421 } 422 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, 423 ata_scsi_em_message_show, ata_scsi_em_message_store); 424 EXPORT_SYMBOL_GPL(dev_attr_em_message); 425 426 static ssize_t 427 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, 428 char *buf) 429 { 430 struct Scsi_Host *shost = class_to_shost(dev); 431 struct ata_port *ap = ata_shost_to_port(shost); 432 433 return snprintf(buf, 23, "%d\n", ap->em_message_type); 434 } 435 DEVICE_ATTR(em_message_type, S_IRUGO, 436 ata_scsi_em_message_type_show, NULL); 437 EXPORT_SYMBOL_GPL(dev_attr_em_message_type); 438 439 static ssize_t 440 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, 441 char *buf) 442 { 443 struct scsi_device *sdev = to_scsi_device(dev); 444 struct ata_port *ap = ata_shost_to_port(sdev->host); 445 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 446 447 if (atadev && ap->ops->sw_activity_show && 448 (ap->flags & ATA_FLAG_SW_ACTIVITY)) 449 return ap->ops->sw_activity_show(atadev, buf); 450 return -EINVAL; 451 } 452 453 static ssize_t 454 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, 455 const char *buf, size_t count) 456 { 457 struct scsi_device *sdev = to_scsi_device(dev); 458 struct ata_port *ap = ata_shost_to_port(sdev->host); 459 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 460 enum sw_activity val; 461 int rc; 462 463 if (atadev && ap->ops->sw_activity_store && 464 (ap->flags & ATA_FLAG_SW_ACTIVITY)) { 465 val = simple_strtoul(buf, NULL, 0); 466 switch (val) { 467 case OFF: case BLINK_ON: case BLINK_OFF: 468 rc = ap->ops->sw_activity_store(atadev, val); 469 if (!rc) 470 return count; 471 else 472 return rc; 473 } 474 } 475 return -EINVAL; 476 } 477 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, 478 ata_scsi_activity_store); 479 EXPORT_SYMBOL_GPL(dev_attr_sw_activity); 480 481 struct device_attribute *ata_common_sdev_attrs[] = { 482 &dev_attr_unload_heads, 483 &dev_attr_ncq_prio_enable, 484 NULL 485 }; 486 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); 487 488 /** 489 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 490 * @sdev: SCSI device for which BIOS geometry is to be determined 491 * @bdev: block device associated with @sdev 492 * @capacity: capacity of SCSI device 493 * @geom: location to which geometry will be output 494 * 495 * Generic bios head/sector/cylinder calculator 496 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 497 * mapping. Some situations may arise where the disk is not 498 * bootable if this is not used. 499 * 500 * LOCKING: 501 * Defined by the SCSI layer. We don't really care. 502 * 503 * RETURNS: 504 * Zero. 505 */ 506 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 507 sector_t capacity, int geom[]) 508 { 509 geom[0] = 255; 510 geom[1] = 63; 511 sector_div(capacity, 255*63); 512 geom[2] = capacity; 513 514 return 0; 515 } 516 517 /** 518 * ata_scsi_unlock_native_capacity - unlock native capacity 519 * @sdev: SCSI device to adjust device capacity for 520 * 521 * This function is called if a partition on @sdev extends beyond 522 * the end of the device. It requests EH to unlock HPA. 523 * 524 * LOCKING: 525 * Defined by the SCSI layer. Might sleep. 526 */ 527 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 528 { 529 struct ata_port *ap = ata_shost_to_port(sdev->host); 530 struct ata_device *dev; 531 unsigned long flags; 532 533 spin_lock_irqsave(ap->lock, flags); 534 535 dev = ata_scsi_find_dev(ap, sdev); 536 if (dev && dev->n_sectors < dev->n_native_sectors) { 537 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 538 dev->link->eh_info.action |= ATA_EH_RESET; 539 ata_port_schedule_eh(ap); 540 } 541 542 spin_unlock_irqrestore(ap->lock, flags); 543 ata_port_wait_eh(ap); 544 } 545 546 /** 547 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 548 * @ap: target port 549 * @sdev: SCSI device to get identify data for 550 * @arg: User buffer area for identify data 551 * 552 * LOCKING: 553 * Defined by the SCSI layer. We don't really care. 554 * 555 * RETURNS: 556 * Zero on success, negative errno on error. 557 */ 558 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 559 void __user *arg) 560 { 561 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 562 u16 __user *dst = arg; 563 char buf[40]; 564 565 if (!dev) 566 return -ENOMSG; 567 568 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 569 return -EFAULT; 570 571 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 572 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 573 return -EFAULT; 574 575 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 576 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 577 return -EFAULT; 578 579 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 580 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 581 return -EFAULT; 582 583 return 0; 584 } 585 586 /** 587 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 588 * @scsidev: Device to which we are issuing command 589 * @arg: User provided data for issuing command 590 * 591 * LOCKING: 592 * Defined by the SCSI layer. We don't really care. 593 * 594 * RETURNS: 595 * Zero on success, negative errno on error. 596 */ 597 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 598 { 599 int rc = 0; 600 u8 scsi_cmd[MAX_COMMAND_SIZE]; 601 u8 args[4], *argbuf = NULL, *sensebuf = NULL; 602 int argsize = 0; 603 enum dma_data_direction data_dir; 604 struct scsi_sense_hdr sshdr; 605 int cmd_result; 606 607 if (arg == NULL) 608 return -EINVAL; 609 610 if (copy_from_user(args, arg, sizeof(args))) 611 return -EFAULT; 612 613 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 614 if (!sensebuf) 615 return -ENOMEM; 616 617 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 618 619 if (args[3]) { 620 argsize = ATA_SECT_SIZE * args[3]; 621 argbuf = kmalloc(argsize, GFP_KERNEL); 622 if (argbuf == NULL) { 623 rc = -ENOMEM; 624 goto error; 625 } 626 627 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 628 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 629 block count in sector count field */ 630 data_dir = DMA_FROM_DEVICE; 631 } else { 632 scsi_cmd[1] = (3 << 1); /* Non-data */ 633 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 634 data_dir = DMA_NONE; 635 } 636 637 scsi_cmd[0] = ATA_16; 638 639 scsi_cmd[4] = args[2]; 640 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 641 scsi_cmd[6] = args[3]; 642 scsi_cmd[8] = args[1]; 643 scsi_cmd[10] = 0x4f; 644 scsi_cmd[12] = 0xc2; 645 } else { 646 scsi_cmd[6] = args[1]; 647 } 648 scsi_cmd[14] = args[0]; 649 650 /* Good values for timeout and retries? Values below 651 from scsi_ioctl_send_command() for default case... */ 652 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 653 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 654 655 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 656 u8 *desc = sensebuf + 8; 657 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 658 659 /* If we set cc then ATA pass-through will cause a 660 * check condition even if no error. Filter that. */ 661 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 662 if (sshdr.sense_key == RECOVERED_ERROR && 663 sshdr.asc == 0 && sshdr.ascq == 0x1d) 664 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 665 } 666 667 /* Send userspace a few ATA registers (same as drivers/ide) */ 668 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 669 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 670 args[0] = desc[13]; /* status */ 671 args[1] = desc[3]; /* error */ 672 args[2] = desc[5]; /* sector count (0:7) */ 673 if (copy_to_user(arg, args, sizeof(args))) 674 rc = -EFAULT; 675 } 676 } 677 678 679 if (cmd_result) { 680 rc = -EIO; 681 goto error; 682 } 683 684 if ((argbuf) 685 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 686 rc = -EFAULT; 687 error: 688 kfree(sensebuf); 689 kfree(argbuf); 690 return rc; 691 } 692 693 /** 694 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 695 * @scsidev: Device to which we are issuing command 696 * @arg: User provided data for issuing command 697 * 698 * LOCKING: 699 * Defined by the SCSI layer. We don't really care. 700 * 701 * RETURNS: 702 * Zero on success, negative errno on error. 703 */ 704 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 705 { 706 int rc = 0; 707 u8 scsi_cmd[MAX_COMMAND_SIZE]; 708 u8 args[7], *sensebuf = NULL; 709 struct scsi_sense_hdr sshdr; 710 int cmd_result; 711 712 if (arg == NULL) 713 return -EINVAL; 714 715 if (copy_from_user(args, arg, sizeof(args))) 716 return -EFAULT; 717 718 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 719 if (!sensebuf) 720 return -ENOMEM; 721 722 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 723 scsi_cmd[0] = ATA_16; 724 scsi_cmd[1] = (3 << 1); /* Non-data */ 725 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 726 scsi_cmd[4] = args[1]; 727 scsi_cmd[6] = args[2]; 728 scsi_cmd[8] = args[3]; 729 scsi_cmd[10] = args[4]; 730 scsi_cmd[12] = args[5]; 731 scsi_cmd[13] = args[6] & 0x4f; 732 scsi_cmd[14] = args[0]; 733 734 /* Good values for timeout and retries? Values below 735 from scsi_ioctl_send_command() for default case... */ 736 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 737 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 738 739 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 740 u8 *desc = sensebuf + 8; 741 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 742 743 /* If we set cc then ATA pass-through will cause a 744 * check condition even if no error. Filter that. */ 745 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 746 if (sshdr.sense_key == RECOVERED_ERROR && 747 sshdr.asc == 0 && sshdr.ascq == 0x1d) 748 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 749 } 750 751 /* Send userspace ATA registers */ 752 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 753 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 754 args[0] = desc[13]; /* status */ 755 args[1] = desc[3]; /* error */ 756 args[2] = desc[5]; /* sector count (0:7) */ 757 args[3] = desc[7]; /* lbal */ 758 args[4] = desc[9]; /* lbam */ 759 args[5] = desc[11]; /* lbah */ 760 args[6] = desc[12]; /* select */ 761 if (copy_to_user(arg, args, sizeof(args))) 762 rc = -EFAULT; 763 } 764 } 765 766 if (cmd_result) { 767 rc = -EIO; 768 goto error; 769 } 770 771 error: 772 kfree(sensebuf); 773 return rc; 774 } 775 776 static int ata_ioc32(struct ata_port *ap) 777 { 778 if (ap->flags & ATA_FLAG_PIO_DMA) 779 return 1; 780 if (ap->pflags & ATA_PFLAG_PIO32) 781 return 1; 782 return 0; 783 } 784 785 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 786 int cmd, void __user *arg) 787 { 788 unsigned long val; 789 int rc = -EINVAL; 790 unsigned long flags; 791 792 switch (cmd) { 793 case HDIO_GET_32BIT: 794 spin_lock_irqsave(ap->lock, flags); 795 val = ata_ioc32(ap); 796 spin_unlock_irqrestore(ap->lock, flags); 797 return put_user(val, (unsigned long __user *)arg); 798 799 case HDIO_SET_32BIT: 800 val = (unsigned long) arg; 801 rc = 0; 802 spin_lock_irqsave(ap->lock, flags); 803 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 804 if (val) 805 ap->pflags |= ATA_PFLAG_PIO32; 806 else 807 ap->pflags &= ~ATA_PFLAG_PIO32; 808 } else { 809 if (val != ata_ioc32(ap)) 810 rc = -EINVAL; 811 } 812 spin_unlock_irqrestore(ap->lock, flags); 813 return rc; 814 815 case HDIO_GET_IDENTITY: 816 return ata_get_identity(ap, scsidev, arg); 817 818 case HDIO_DRIVE_CMD: 819 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 820 return -EACCES; 821 return ata_cmd_ioctl(scsidev, arg); 822 823 case HDIO_DRIVE_TASK: 824 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 825 return -EACCES; 826 return ata_task_ioctl(scsidev, arg); 827 828 default: 829 rc = -ENOTTY; 830 break; 831 } 832 833 return rc; 834 } 835 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 836 837 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) 838 { 839 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 840 scsidev, cmd, arg); 841 } 842 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 843 844 /** 845 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 846 * @dev: ATA device to which the new command is attached 847 * @cmd: SCSI command that originated this ATA command 848 * 849 * Obtain a reference to an unused ata_queued_cmd structure, 850 * which is the basic libata structure representing a single 851 * ATA command sent to the hardware. 852 * 853 * If a command was available, fill in the SCSI-specific 854 * portions of the structure with information on the 855 * current command. 856 * 857 * LOCKING: 858 * spin_lock_irqsave(host lock) 859 * 860 * RETURNS: 861 * Command allocated, or %NULL if none available. 862 */ 863 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 864 struct scsi_cmnd *cmd) 865 { 866 struct ata_queued_cmd *qc; 867 868 qc = ata_qc_new_init(dev, cmd->request->tag); 869 if (qc) { 870 qc->scsicmd = cmd; 871 qc->scsidone = cmd->scsi_done; 872 873 qc->sg = scsi_sglist(cmd); 874 qc->n_elem = scsi_sg_count(cmd); 875 } else { 876 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 877 cmd->scsi_done(cmd); 878 } 879 880 return qc; 881 } 882 883 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 884 { 885 struct scsi_cmnd *scmd = qc->scsicmd; 886 887 qc->extrabytes = scmd->request->extra_len; 888 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 889 } 890 891 /** 892 * ata_dump_status - user friendly display of error info 893 * @id: id of the port in question 894 * @tf: ptr to filled out taskfile 895 * 896 * Decode and dump the ATA error/status registers for the user so 897 * that they have some idea what really happened at the non 898 * make-believe layer. 899 * 900 * LOCKING: 901 * inherited from caller 902 */ 903 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 904 { 905 u8 stat = tf->command, err = tf->feature; 906 907 pr_warn("ata%u: status=0x%02x { ", id, stat); 908 if (stat & ATA_BUSY) { 909 pr_cont("Busy }\n"); /* Data is not valid in this case */ 910 } else { 911 if (stat & ATA_DRDY) pr_cont("DriveReady "); 912 if (stat & ATA_DF) pr_cont("DeviceFault "); 913 if (stat & ATA_DSC) pr_cont("SeekComplete "); 914 if (stat & ATA_DRQ) pr_cont("DataRequest "); 915 if (stat & ATA_CORR) pr_cont("CorrectedError "); 916 if (stat & ATA_SENSE) pr_cont("Sense "); 917 if (stat & ATA_ERR) pr_cont("Error "); 918 pr_cont("}\n"); 919 920 if (err) { 921 pr_warn("ata%u: error=0x%02x { ", id, err); 922 if (err & ATA_ABORTED) pr_cont("DriveStatusError "); 923 if (err & ATA_ICRC) { 924 if (err & ATA_ABORTED) 925 pr_cont("BadCRC "); 926 else pr_cont("Sector "); 927 } 928 if (err & ATA_UNC) pr_cont("UncorrectableError "); 929 if (err & ATA_IDNF) pr_cont("SectorIdNotFound "); 930 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound "); 931 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound "); 932 pr_cont("}\n"); 933 } 934 } 935 } 936 937 /** 938 * ata_to_sense_error - convert ATA error to SCSI error 939 * @id: ATA device number 940 * @drv_stat: value contained in ATA status register 941 * @drv_err: value contained in ATA error register 942 * @sk: the sense key we'll fill out 943 * @asc: the additional sense code we'll fill out 944 * @ascq: the additional sense code qualifier we'll fill out 945 * @verbose: be verbose 946 * 947 * Converts an ATA error into a SCSI error. Fill out pointers to 948 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 949 * format sense blocks. 950 * 951 * LOCKING: 952 * spin_lock_irqsave(host lock) 953 */ 954 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 955 u8 *asc, u8 *ascq, int verbose) 956 { 957 int i; 958 959 /* Based on the 3ware driver translation table */ 960 static const unsigned char sense_table[][4] = { 961 /* BBD|ECC|ID|MAR */ 962 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 963 // Device busy Aborted command 964 /* BBD|ECC|ID */ 965 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 966 // Device busy Aborted command 967 /* ECC|MC|MARK */ 968 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 969 // Device fault Hardware error 970 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 971 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 972 // Data CRC error SCSI parity error 973 /* MC|ID|ABRT|TRK0|MARK */ 974 {0x37, NOT_READY, 0x04, 0x00}, 975 // Unit offline Not ready 976 /* MCR|MARK */ 977 {0x09, NOT_READY, 0x04, 0x00}, 978 // Unrecovered disk error Not ready 979 /* Bad address mark */ 980 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 981 // Address mark not found for data field 982 /* TRK0 - Track 0 not found */ 983 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 984 // Hardware error 985 /* Abort: 0x04 is not translated here, see below */ 986 /* Media change request */ 987 {0x08, NOT_READY, 0x04, 0x00}, 988 // FIXME: faking offline 989 /* SRV/IDNF - ID not found */ 990 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 991 // Logical address out of range 992 /* MC - Media Changed */ 993 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 994 // Not ready to ready change, medium may have changed 995 /* ECC - Uncorrectable ECC error */ 996 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 997 // Unrecovered read error 998 /* BBD - block marked bad */ 999 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 1000 // Block marked bad Medium error, unrecovered read error 1001 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 1002 }; 1003 static const unsigned char stat_table[][4] = { 1004 /* Must be first because BUSY means no other bits valid */ 1005 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 1006 // Busy, fake parity for now 1007 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 1008 // Device ready, unaligned write command 1009 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 1010 // Device fault, internal target failure 1011 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 1012 // Timed out in xfer, fake parity for now 1013 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 1014 // Recovered ECC error Medium error, recovered 1015 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 1016 }; 1017 1018 /* 1019 * Is this an error we can process/parse 1020 */ 1021 if (drv_stat & ATA_BUSY) { 1022 drv_err = 0; /* Ignore the err bits, they're invalid */ 1023 } 1024 1025 if (drv_err) { 1026 /* Look for drv_err */ 1027 for (i = 0; sense_table[i][0] != 0xFF; i++) { 1028 /* Look for best matches first */ 1029 if ((sense_table[i][0] & drv_err) == 1030 sense_table[i][0]) { 1031 *sk = sense_table[i][1]; 1032 *asc = sense_table[i][2]; 1033 *ascq = sense_table[i][3]; 1034 goto translate_done; 1035 } 1036 } 1037 } 1038 1039 /* 1040 * Fall back to interpreting status bits. Note that if the drv_err 1041 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 1042 * is not descriptive enough. 1043 */ 1044 for (i = 0; stat_table[i][0] != 0xFF; i++) { 1045 if (stat_table[i][0] & drv_stat) { 1046 *sk = stat_table[i][1]; 1047 *asc = stat_table[i][2]; 1048 *ascq = stat_table[i][3]; 1049 goto translate_done; 1050 } 1051 } 1052 1053 /* 1054 * We need a sensible error return here, which is tricky, and one 1055 * that won't cause people to do things like return a disk wrongly. 1056 */ 1057 *sk = ABORTED_COMMAND; 1058 *asc = 0x00; 1059 *ascq = 0x00; 1060 1061 translate_done: 1062 if (verbose) 1063 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 1064 id, drv_stat, drv_err, *sk, *asc, *ascq); 1065 return; 1066 } 1067 1068 /* 1069 * ata_gen_passthru_sense - Generate check condition sense block. 1070 * @qc: Command that completed. 1071 * 1072 * This function is specific to the ATA descriptor format sense 1073 * block specified for the ATA pass through commands. Regardless 1074 * of whether the command errored or not, return a sense 1075 * block. Copy all controller registers into the sense 1076 * block. If there was no error, we get the request from an ATA 1077 * passthrough command, so we use the following sense data: 1078 * sk = RECOVERED ERROR 1079 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1080 * 1081 * 1082 * LOCKING: 1083 * None. 1084 */ 1085 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 1086 { 1087 struct scsi_cmnd *cmd = qc->scsicmd; 1088 struct ata_taskfile *tf = &qc->result_tf; 1089 unsigned char *sb = cmd->sense_buffer; 1090 unsigned char *desc = sb + 8; 1091 int verbose = qc->ap->ops->error_handler == NULL; 1092 u8 sense_key, asc, ascq; 1093 1094 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1095 1096 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1097 1098 /* 1099 * Use ata_to_sense_error() to map status register bits 1100 * onto sense key, asc & ascq. 1101 */ 1102 if (qc->err_mask || 1103 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1104 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1105 &sense_key, &asc, &ascq, verbose); 1106 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 1107 } else { 1108 /* 1109 * ATA PASS-THROUGH INFORMATION AVAILABLE 1110 * Always in descriptor format sense. 1111 */ 1112 scsi_build_sense_buffer(1, cmd->sense_buffer, 1113 RECOVERED_ERROR, 0, 0x1D); 1114 } 1115 1116 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 1117 u8 len; 1118 1119 /* descriptor format */ 1120 len = sb[7]; 1121 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 1122 if (!desc) { 1123 if (SCSI_SENSE_BUFFERSIZE < len + 14) 1124 return; 1125 sb[7] = len + 14; 1126 desc = sb + 8 + len; 1127 } 1128 desc[0] = 9; 1129 desc[1] = 12; 1130 /* 1131 * Copy registers into sense buffer. 1132 */ 1133 desc[2] = 0x00; 1134 desc[3] = tf->feature; /* == error reg */ 1135 desc[5] = tf->nsect; 1136 desc[7] = tf->lbal; 1137 desc[9] = tf->lbam; 1138 desc[11] = tf->lbah; 1139 desc[12] = tf->device; 1140 desc[13] = tf->command; /* == status reg */ 1141 1142 /* 1143 * Fill in Extend bit, and the high order bytes 1144 * if applicable. 1145 */ 1146 if (tf->flags & ATA_TFLAG_LBA48) { 1147 desc[2] |= 0x01; 1148 desc[4] = tf->hob_nsect; 1149 desc[6] = tf->hob_lbal; 1150 desc[8] = tf->hob_lbam; 1151 desc[10] = tf->hob_lbah; 1152 } 1153 } else { 1154 /* Fixed sense format */ 1155 desc[0] = tf->feature; 1156 desc[1] = tf->command; /* status */ 1157 desc[2] = tf->device; 1158 desc[3] = tf->nsect; 1159 desc[7] = 0; 1160 if (tf->flags & ATA_TFLAG_LBA48) { 1161 desc[8] |= 0x80; 1162 if (tf->hob_nsect) 1163 desc[8] |= 0x40; 1164 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 1165 desc[8] |= 0x20; 1166 } 1167 desc[9] = tf->lbal; 1168 desc[10] = tf->lbam; 1169 desc[11] = tf->lbah; 1170 } 1171 } 1172 1173 /** 1174 * ata_gen_ata_sense - generate a SCSI fixed sense block 1175 * @qc: Command that we are erroring out 1176 * 1177 * Generate sense block for a failed ATA command @qc. Descriptor 1178 * format is used to accommodate LBA48 block address. 1179 * 1180 * LOCKING: 1181 * None. 1182 */ 1183 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 1184 { 1185 struct ata_device *dev = qc->dev; 1186 struct scsi_cmnd *cmd = qc->scsicmd; 1187 struct ata_taskfile *tf = &qc->result_tf; 1188 unsigned char *sb = cmd->sense_buffer; 1189 int verbose = qc->ap->ops->error_handler == NULL; 1190 u64 block; 1191 u8 sense_key, asc, ascq; 1192 1193 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1194 1195 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1196 1197 if (ata_dev_disabled(dev)) { 1198 /* Device disabled after error recovery */ 1199 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 1200 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 1201 return; 1202 } 1203 /* Use ata_to_sense_error() to map status register bits 1204 * onto sense key, asc & ascq. 1205 */ 1206 if (qc->err_mask || 1207 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1208 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1209 &sense_key, &asc, &ascq, verbose); 1210 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1211 } else { 1212 /* Could not decode error */ 1213 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1214 tf->command, qc->err_mask); 1215 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1216 return; 1217 } 1218 1219 block = ata_tf_read_block(&qc->result_tf, dev); 1220 if (block == U64_MAX) 1221 return; 1222 1223 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1224 } 1225 1226 static void ata_scsi_sdev_config(struct scsi_device *sdev) 1227 { 1228 sdev->use_10_for_rw = 1; 1229 sdev->use_10_for_ms = 1; 1230 sdev->no_write_same = 1; 1231 1232 /* Schedule policy is determined by ->qc_defer() callback and 1233 * it needs to see every deferred qc. Set dev_blocked to 1 to 1234 * prevent SCSI midlayer from automatically deferring 1235 * requests. 1236 */ 1237 sdev->max_device_blocked = 1; 1238 } 1239 1240 /** 1241 * atapi_drain_needed - Check whether data transfer may overflow 1242 * @rq: request to be checked 1243 * 1244 * ATAPI commands which transfer variable length data to host 1245 * might overflow due to application error or hardware bug. This 1246 * function checks whether overflow should be drained and ignored 1247 * for @request. 1248 * 1249 * LOCKING: 1250 * None. 1251 * 1252 * RETURNS: 1253 * 1 if ; otherwise, 0. 1254 */ 1255 static int atapi_drain_needed(struct request *rq) 1256 { 1257 if (likely(!blk_rq_is_passthrough(rq))) 1258 return 0; 1259 1260 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq))) 1261 return 0; 1262 1263 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; 1264 } 1265 1266 static int ata_scsi_dev_config(struct scsi_device *sdev, 1267 struct ata_device *dev) 1268 { 1269 struct request_queue *q = sdev->request_queue; 1270 1271 if (!ata_id_has_unload(dev->id)) 1272 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1273 1274 /* configure max sectors */ 1275 blk_queue_max_hw_sectors(q, dev->max_sectors); 1276 1277 if (dev->class == ATA_DEV_ATAPI) { 1278 void *buf; 1279 1280 sdev->sector_size = ATA_SECT_SIZE; 1281 1282 /* set DMA padding */ 1283 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1284 1285 /* configure draining */ 1286 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1287 if (!buf) { 1288 ata_dev_err(dev, "drain buffer allocation failed\n"); 1289 return -ENOMEM; 1290 } 1291 1292 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1293 } else { 1294 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1295 sdev->manage_start_stop = 1; 1296 } 1297 1298 /* 1299 * ata_pio_sectors() expects buffer for each sector to not cross 1300 * page boundary. Enforce it by requiring buffers to be sector 1301 * aligned, which works iff sector_size is not larger than 1302 * PAGE_SIZE. ATAPI devices also need the alignment as 1303 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1304 */ 1305 if (sdev->sector_size > PAGE_SIZE) 1306 ata_dev_warn(dev, 1307 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1308 sdev->sector_size); 1309 1310 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1311 1312 if (dev->flags & ATA_DFLAG_AN) 1313 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1314 1315 if (dev->flags & ATA_DFLAG_NCQ) { 1316 int depth; 1317 1318 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1319 depth = min(ATA_MAX_QUEUE - 1, depth); 1320 scsi_change_queue_depth(sdev, depth); 1321 } 1322 1323 blk_queue_flush_queueable(q, false); 1324 1325 if (dev->flags & ATA_DFLAG_TRUSTED) 1326 sdev->security_supported = 1; 1327 1328 dev->sdev = sdev; 1329 return 0; 1330 } 1331 1332 /** 1333 * ata_scsi_slave_config - Set SCSI device attributes 1334 * @sdev: SCSI device to examine 1335 * 1336 * This is called before we actually start reading 1337 * and writing to the device, to configure certain 1338 * SCSI mid-layer behaviors. 1339 * 1340 * LOCKING: 1341 * Defined by SCSI layer. We don't really care. 1342 */ 1343 1344 int ata_scsi_slave_config(struct scsi_device *sdev) 1345 { 1346 struct ata_port *ap = ata_shost_to_port(sdev->host); 1347 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1348 int rc = 0; 1349 1350 ata_scsi_sdev_config(sdev); 1351 1352 if (dev) 1353 rc = ata_scsi_dev_config(sdev, dev); 1354 1355 return rc; 1356 } 1357 1358 /** 1359 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1360 * @sdev: SCSI device to be destroyed 1361 * 1362 * @sdev is about to be destroyed for hot/warm unplugging. If 1363 * this unplugging was initiated by libata as indicated by NULL 1364 * dev->sdev, this function doesn't have to do anything. 1365 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1366 * Clear dev->sdev, schedule the device for ATA detach and invoke 1367 * EH. 1368 * 1369 * LOCKING: 1370 * Defined by SCSI layer. We don't really care. 1371 */ 1372 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1373 { 1374 struct ata_port *ap = ata_shost_to_port(sdev->host); 1375 struct request_queue *q = sdev->request_queue; 1376 unsigned long flags; 1377 struct ata_device *dev; 1378 1379 if (!ap->ops->error_handler) 1380 return; 1381 1382 spin_lock_irqsave(ap->lock, flags); 1383 dev = __ata_scsi_find_dev(ap, sdev); 1384 if (dev && dev->sdev) { 1385 /* SCSI device already in CANCEL state, no need to offline it */ 1386 dev->sdev = NULL; 1387 dev->flags |= ATA_DFLAG_DETACH; 1388 ata_port_schedule_eh(ap); 1389 } 1390 spin_unlock_irqrestore(ap->lock, flags); 1391 1392 kfree(q->dma_drain_buffer); 1393 q->dma_drain_buffer = NULL; 1394 q->dma_drain_size = 0; 1395 } 1396 1397 /** 1398 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth 1399 * @ap: ATA port to which the device change the queue depth 1400 * @sdev: SCSI device to configure queue depth for 1401 * @queue_depth: new queue depth 1402 * 1403 * libsas and libata have different approaches for associating a sdev to 1404 * its ata_port. 1405 * 1406 */ 1407 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1408 int queue_depth) 1409 { 1410 struct ata_device *dev; 1411 unsigned long flags; 1412 1413 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1414 return sdev->queue_depth; 1415 1416 dev = ata_scsi_find_dev(ap, sdev); 1417 if (!dev || !ata_dev_enabled(dev)) 1418 return sdev->queue_depth; 1419 1420 /* NCQ enabled? */ 1421 spin_lock_irqsave(ap->lock, flags); 1422 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1423 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1424 dev->flags |= ATA_DFLAG_NCQ_OFF; 1425 queue_depth = 1; 1426 } 1427 spin_unlock_irqrestore(ap->lock, flags); 1428 1429 /* limit and apply queue depth */ 1430 queue_depth = min(queue_depth, sdev->host->can_queue); 1431 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1432 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); 1433 1434 if (sdev->queue_depth == queue_depth) 1435 return -EINVAL; 1436 1437 return scsi_change_queue_depth(sdev, queue_depth); 1438 } 1439 1440 /** 1441 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1442 * @sdev: SCSI device to configure queue depth for 1443 * @queue_depth: new queue depth 1444 * 1445 * This is libata standard hostt->change_queue_depth callback. 1446 * SCSI will call into this callback when user tries to set queue 1447 * depth via sysfs. 1448 * 1449 * LOCKING: 1450 * SCSI layer (we don't care) 1451 * 1452 * RETURNS: 1453 * Newly configured queue depth. 1454 */ 1455 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) 1456 { 1457 struct ata_port *ap = ata_shost_to_port(sdev->host); 1458 1459 return __ata_change_queue_depth(ap, sdev, queue_depth); 1460 } 1461 1462 /** 1463 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1464 * @qc: Storage for translated ATA taskfile 1465 * 1466 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1467 * (to start). Perhaps these commands should be preceded by 1468 * CHECK POWER MODE to see what power mode the device is already in. 1469 * [See SAT revision 5 at www.t10.org] 1470 * 1471 * LOCKING: 1472 * spin_lock_irqsave(host lock) 1473 * 1474 * RETURNS: 1475 * Zero on success, non-zero on error. 1476 */ 1477 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1478 { 1479 struct scsi_cmnd *scmd = qc->scsicmd; 1480 struct ata_taskfile *tf = &qc->tf; 1481 const u8 *cdb = scmd->cmnd; 1482 u16 fp; 1483 u8 bp = 0xff; 1484 1485 if (scmd->cmd_len < 5) { 1486 fp = 4; 1487 goto invalid_fld; 1488 } 1489 1490 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1491 tf->protocol = ATA_PROT_NODATA; 1492 if (cdb[1] & 0x1) { 1493 ; /* ignore IMMED bit, violates sat-r05 */ 1494 } 1495 if (cdb[4] & 0x2) { 1496 fp = 4; 1497 bp = 1; 1498 goto invalid_fld; /* LOEJ bit set not supported */ 1499 } 1500 if (((cdb[4] >> 4) & 0xf) != 0) { 1501 fp = 4; 1502 bp = 3; 1503 goto invalid_fld; /* power conditions not supported */ 1504 } 1505 1506 if (cdb[4] & 0x1) { 1507 tf->nsect = 1; /* 1 sector, lba=0 */ 1508 1509 if (qc->dev->flags & ATA_DFLAG_LBA) { 1510 tf->flags |= ATA_TFLAG_LBA; 1511 1512 tf->lbah = 0x0; 1513 tf->lbam = 0x0; 1514 tf->lbal = 0x0; 1515 tf->device |= ATA_LBA; 1516 } else { 1517 /* CHS */ 1518 tf->lbal = 0x1; /* sect */ 1519 tf->lbam = 0x0; /* cyl low */ 1520 tf->lbah = 0x0; /* cyl high */ 1521 } 1522 1523 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1524 } else { 1525 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1526 * or S5) causing some drives to spin up and down again. 1527 */ 1528 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1529 system_state == SYSTEM_POWER_OFF) 1530 goto skip; 1531 1532 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1533 system_entering_hibernation()) 1534 goto skip; 1535 1536 /* Issue ATA STANDBY IMMEDIATE command */ 1537 tf->command = ATA_CMD_STANDBYNOW1; 1538 } 1539 1540 /* 1541 * Standby and Idle condition timers could be implemented but that 1542 * would require libata to implement the Power condition mode page 1543 * and allow the user to change it. Changing mode pages requires 1544 * MODE SELECT to be implemented. 1545 */ 1546 1547 return 0; 1548 1549 invalid_fld: 1550 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1551 return 1; 1552 skip: 1553 scmd->result = SAM_STAT_GOOD; 1554 return 1; 1555 } 1556 1557 1558 /** 1559 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1560 * @qc: Storage for translated ATA taskfile 1561 * 1562 * Sets up an ATA taskfile to issue FLUSH CACHE or 1563 * FLUSH CACHE EXT. 1564 * 1565 * LOCKING: 1566 * spin_lock_irqsave(host lock) 1567 * 1568 * RETURNS: 1569 * Zero on success, non-zero on error. 1570 */ 1571 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1572 { 1573 struct ata_taskfile *tf = &qc->tf; 1574 1575 tf->flags |= ATA_TFLAG_DEVICE; 1576 tf->protocol = ATA_PROT_NODATA; 1577 1578 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1579 tf->command = ATA_CMD_FLUSH_EXT; 1580 else 1581 tf->command = ATA_CMD_FLUSH; 1582 1583 /* flush is critical for IO integrity, consider it an IO command */ 1584 qc->flags |= ATA_QCFLAG_IO; 1585 1586 return 0; 1587 } 1588 1589 /** 1590 * scsi_6_lba_len - Get LBA and transfer length 1591 * @cdb: SCSI command to translate 1592 * 1593 * Calculate LBA and transfer length for 6-byte commands. 1594 * 1595 * RETURNS: 1596 * @plba: the LBA 1597 * @plen: the transfer length 1598 */ 1599 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1600 { 1601 u64 lba = 0; 1602 u32 len; 1603 1604 VPRINTK("six-byte command\n"); 1605 1606 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1607 lba |= ((u64)cdb[2]) << 8; 1608 lba |= ((u64)cdb[3]); 1609 1610 len = cdb[4]; 1611 1612 *plba = lba; 1613 *plen = len; 1614 } 1615 1616 /** 1617 * scsi_10_lba_len - Get LBA and transfer length 1618 * @cdb: SCSI command to translate 1619 * 1620 * Calculate LBA and transfer length for 10-byte commands. 1621 * 1622 * RETURNS: 1623 * @plba: the LBA 1624 * @plen: the transfer length 1625 */ 1626 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1627 { 1628 u64 lba = 0; 1629 u32 len = 0; 1630 1631 VPRINTK("ten-byte command\n"); 1632 1633 lba |= ((u64)cdb[2]) << 24; 1634 lba |= ((u64)cdb[3]) << 16; 1635 lba |= ((u64)cdb[4]) << 8; 1636 lba |= ((u64)cdb[5]); 1637 1638 len |= ((u32)cdb[7]) << 8; 1639 len |= ((u32)cdb[8]); 1640 1641 *plba = lba; 1642 *plen = len; 1643 } 1644 1645 /** 1646 * scsi_16_lba_len - Get LBA and transfer length 1647 * @cdb: SCSI command to translate 1648 * 1649 * Calculate LBA and transfer length for 16-byte commands. 1650 * 1651 * RETURNS: 1652 * @plba: the LBA 1653 * @plen: the transfer length 1654 */ 1655 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1656 { 1657 u64 lba = 0; 1658 u32 len = 0; 1659 1660 VPRINTK("sixteen-byte command\n"); 1661 1662 lba |= ((u64)cdb[2]) << 56; 1663 lba |= ((u64)cdb[3]) << 48; 1664 lba |= ((u64)cdb[4]) << 40; 1665 lba |= ((u64)cdb[5]) << 32; 1666 lba |= ((u64)cdb[6]) << 24; 1667 lba |= ((u64)cdb[7]) << 16; 1668 lba |= ((u64)cdb[8]) << 8; 1669 lba |= ((u64)cdb[9]); 1670 1671 len |= ((u32)cdb[10]) << 24; 1672 len |= ((u32)cdb[11]) << 16; 1673 len |= ((u32)cdb[12]) << 8; 1674 len |= ((u32)cdb[13]); 1675 1676 *plba = lba; 1677 *plen = len; 1678 } 1679 1680 /** 1681 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1682 * @qc: Storage for translated ATA taskfile 1683 * 1684 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1685 * 1686 * LOCKING: 1687 * spin_lock_irqsave(host lock) 1688 * 1689 * RETURNS: 1690 * Zero on success, non-zero on error. 1691 */ 1692 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1693 { 1694 struct scsi_cmnd *scmd = qc->scsicmd; 1695 struct ata_taskfile *tf = &qc->tf; 1696 struct ata_device *dev = qc->dev; 1697 u64 dev_sectors = qc->dev->n_sectors; 1698 const u8 *cdb = scmd->cmnd; 1699 u64 block; 1700 u32 n_block; 1701 u16 fp; 1702 1703 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1704 tf->protocol = ATA_PROT_NODATA; 1705 1706 if (cdb[0] == VERIFY) { 1707 if (scmd->cmd_len < 10) { 1708 fp = 9; 1709 goto invalid_fld; 1710 } 1711 scsi_10_lba_len(cdb, &block, &n_block); 1712 } else if (cdb[0] == VERIFY_16) { 1713 if (scmd->cmd_len < 16) { 1714 fp = 15; 1715 goto invalid_fld; 1716 } 1717 scsi_16_lba_len(cdb, &block, &n_block); 1718 } else { 1719 fp = 0; 1720 goto invalid_fld; 1721 } 1722 1723 if (!n_block) 1724 goto nothing_to_do; 1725 if (block >= dev_sectors) 1726 goto out_of_range; 1727 if ((block + n_block) > dev_sectors) 1728 goto out_of_range; 1729 1730 if (dev->flags & ATA_DFLAG_LBA) { 1731 tf->flags |= ATA_TFLAG_LBA; 1732 1733 if (lba_28_ok(block, n_block)) { 1734 /* use LBA28 */ 1735 tf->command = ATA_CMD_VERIFY; 1736 tf->device |= (block >> 24) & 0xf; 1737 } else if (lba_48_ok(block, n_block)) { 1738 if (!(dev->flags & ATA_DFLAG_LBA48)) 1739 goto out_of_range; 1740 1741 /* use LBA48 */ 1742 tf->flags |= ATA_TFLAG_LBA48; 1743 tf->command = ATA_CMD_VERIFY_EXT; 1744 1745 tf->hob_nsect = (n_block >> 8) & 0xff; 1746 1747 tf->hob_lbah = (block >> 40) & 0xff; 1748 tf->hob_lbam = (block >> 32) & 0xff; 1749 tf->hob_lbal = (block >> 24) & 0xff; 1750 } else 1751 /* request too large even for LBA48 */ 1752 goto out_of_range; 1753 1754 tf->nsect = n_block & 0xff; 1755 1756 tf->lbah = (block >> 16) & 0xff; 1757 tf->lbam = (block >> 8) & 0xff; 1758 tf->lbal = block & 0xff; 1759 1760 tf->device |= ATA_LBA; 1761 } else { 1762 /* CHS */ 1763 u32 sect, head, cyl, track; 1764 1765 if (!lba_28_ok(block, n_block)) 1766 goto out_of_range; 1767 1768 /* Convert LBA to CHS */ 1769 track = (u32)block / dev->sectors; 1770 cyl = track / dev->heads; 1771 head = track % dev->heads; 1772 sect = (u32)block % dev->sectors + 1; 1773 1774 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1775 (u32)block, track, cyl, head, sect); 1776 1777 /* Check whether the converted CHS can fit. 1778 Cylinder: 0-65535 1779 Head: 0-15 1780 Sector: 1-255*/ 1781 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1782 goto out_of_range; 1783 1784 tf->command = ATA_CMD_VERIFY; 1785 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1786 tf->lbal = sect; 1787 tf->lbam = cyl; 1788 tf->lbah = cyl >> 8; 1789 tf->device |= head; 1790 } 1791 1792 return 0; 1793 1794 invalid_fld: 1795 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1796 return 1; 1797 1798 out_of_range: 1799 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1800 /* "Logical Block Address out of range" */ 1801 return 1; 1802 1803 nothing_to_do: 1804 scmd->result = SAM_STAT_GOOD; 1805 return 1; 1806 } 1807 1808 /** 1809 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1810 * @qc: Storage for translated ATA taskfile 1811 * 1812 * Converts any of six SCSI read/write commands into the 1813 * ATA counterpart, including starting sector (LBA), 1814 * sector count, and taking into account the device's LBA48 1815 * support. 1816 * 1817 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1818 * %WRITE_16 are currently supported. 1819 * 1820 * LOCKING: 1821 * spin_lock_irqsave(host lock) 1822 * 1823 * RETURNS: 1824 * Zero on success, non-zero on error. 1825 */ 1826 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1827 { 1828 struct scsi_cmnd *scmd = qc->scsicmd; 1829 const u8 *cdb = scmd->cmnd; 1830 struct request *rq = scmd->request; 1831 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1832 unsigned int tf_flags = 0; 1833 u64 block; 1834 u32 n_block; 1835 int rc; 1836 u16 fp = 0; 1837 1838 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1839 tf_flags |= ATA_TFLAG_WRITE; 1840 1841 /* Calculate the SCSI LBA, transfer length and FUA. */ 1842 switch (cdb[0]) { 1843 case READ_10: 1844 case WRITE_10: 1845 if (unlikely(scmd->cmd_len < 10)) { 1846 fp = 9; 1847 goto invalid_fld; 1848 } 1849 scsi_10_lba_len(cdb, &block, &n_block); 1850 if (cdb[1] & (1 << 3)) 1851 tf_flags |= ATA_TFLAG_FUA; 1852 break; 1853 case READ_6: 1854 case WRITE_6: 1855 if (unlikely(scmd->cmd_len < 6)) { 1856 fp = 5; 1857 goto invalid_fld; 1858 } 1859 scsi_6_lba_len(cdb, &block, &n_block); 1860 1861 /* for 6-byte r/w commands, transfer length 0 1862 * means 256 blocks of data, not 0 block. 1863 */ 1864 if (!n_block) 1865 n_block = 256; 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 break; 1877 default: 1878 DPRINTK("no-byte command\n"); 1879 fp = 0; 1880 goto invalid_fld; 1881 } 1882 1883 /* Check and compose ATA command */ 1884 if (!n_block) 1885 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1886 * length 0 means transfer 0 block of data. 1887 * However, for ATA R/W commands, sector count 0 means 1888 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1889 * 1890 * WARNING: one or two older ATA drives treat 0 as 0... 1891 */ 1892 goto nothing_to_do; 1893 1894 qc->flags |= ATA_QCFLAG_IO; 1895 qc->nbytes = n_block * scmd->device->sector_size; 1896 1897 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1898 qc->tag, class); 1899 1900 if (likely(rc == 0)) 1901 return 0; 1902 1903 if (rc == -ERANGE) 1904 goto out_of_range; 1905 /* treat all other errors as -EINVAL, fall through */ 1906 invalid_fld: 1907 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1908 return 1; 1909 1910 out_of_range: 1911 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1912 /* "Logical Block Address out of range" */ 1913 return 1; 1914 1915 nothing_to_do: 1916 scmd->result = SAM_STAT_GOOD; 1917 return 1; 1918 } 1919 1920 static void ata_qc_done(struct ata_queued_cmd *qc) 1921 { 1922 struct scsi_cmnd *cmd = qc->scsicmd; 1923 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1924 1925 ata_qc_free(qc); 1926 done(cmd); 1927 } 1928 1929 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1930 { 1931 struct ata_port *ap = qc->ap; 1932 struct scsi_cmnd *cmd = qc->scsicmd; 1933 u8 *cdb = cmd->cmnd; 1934 int need_sense = (qc->err_mask != 0); 1935 1936 /* For ATA pass thru (SAT) commands, generate a sense block if 1937 * user mandated it or if there's an error. Note that if we 1938 * generate because the user forced us to [CK_COND =1], a check 1939 * condition is generated and the ATA register values are returned 1940 * whether the command completed successfully or not. If there 1941 * was no error, we use the following sense data: 1942 * sk = RECOVERED ERROR 1943 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1944 */ 1945 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1946 ((cdb[2] & 0x20) || need_sense)) 1947 ata_gen_passthru_sense(qc); 1948 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1949 cmd->result = SAM_STAT_CHECK_CONDITION; 1950 else if (need_sense) 1951 ata_gen_ata_sense(qc); 1952 else 1953 cmd->result = SAM_STAT_GOOD; 1954 1955 if (need_sense && !ap->ops->error_handler) 1956 ata_dump_status(ap->print_id, &qc->result_tf); 1957 1958 ata_qc_done(qc); 1959 } 1960 1961 /** 1962 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1963 * @dev: ATA device to which the command is addressed 1964 * @cmd: SCSI command to execute 1965 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1966 * 1967 * Our ->queuecommand() function has decided that the SCSI 1968 * command issued can be directly translated into an ATA 1969 * command, rather than handled internally. 1970 * 1971 * This function sets up an ata_queued_cmd structure for the 1972 * SCSI command, and sends that ata_queued_cmd to the hardware. 1973 * 1974 * The xlat_func argument (actor) returns 0 if ready to execute 1975 * ATA command, else 1 to finish translation. If 1 is returned 1976 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1977 * to be set reflecting an error condition or clean (early) 1978 * termination. 1979 * 1980 * LOCKING: 1981 * spin_lock_irqsave(host lock) 1982 * 1983 * RETURNS: 1984 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1985 * needs to be deferred. 1986 */ 1987 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1988 ata_xlat_func_t xlat_func) 1989 { 1990 struct ata_port *ap = dev->link->ap; 1991 struct ata_queued_cmd *qc; 1992 int rc; 1993 1994 VPRINTK("ENTER\n"); 1995 1996 qc = ata_scsi_qc_new(dev, cmd); 1997 if (!qc) 1998 goto err_mem; 1999 2000 /* data is present; dma-map it */ 2001 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 2002 cmd->sc_data_direction == DMA_TO_DEVICE) { 2003 if (unlikely(scsi_bufflen(cmd) < 1)) { 2004 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 2005 goto err_did; 2006 } 2007 2008 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 2009 2010 qc->dma_dir = cmd->sc_data_direction; 2011 } 2012 2013 qc->complete_fn = ata_scsi_qc_complete; 2014 2015 if (xlat_func(qc)) 2016 goto early_finish; 2017 2018 if (ap->ops->qc_defer) { 2019 if ((rc = ap->ops->qc_defer(qc))) 2020 goto defer; 2021 } 2022 2023 /* select device, send command to hardware */ 2024 ata_qc_issue(qc); 2025 2026 VPRINTK("EXIT\n"); 2027 return 0; 2028 2029 early_finish: 2030 ata_qc_free(qc); 2031 cmd->scsi_done(cmd); 2032 DPRINTK("EXIT - early finish (good or error)\n"); 2033 return 0; 2034 2035 err_did: 2036 ata_qc_free(qc); 2037 cmd->result = (DID_ERROR << 16); 2038 cmd->scsi_done(cmd); 2039 err_mem: 2040 DPRINTK("EXIT - internal\n"); 2041 return 0; 2042 2043 defer: 2044 ata_qc_free(qc); 2045 DPRINTK("EXIT - defer\n"); 2046 if (rc == ATA_DEFER_LINK) 2047 return SCSI_MLQUEUE_DEVICE_BUSY; 2048 else 2049 return SCSI_MLQUEUE_HOST_BUSY; 2050 } 2051 2052 struct ata_scsi_args { 2053 struct ata_device *dev; 2054 u16 *id; 2055 struct scsi_cmnd *cmd; 2056 }; 2057 2058 /** 2059 * ata_scsi_rbuf_get - Map response buffer. 2060 * @cmd: SCSI command containing buffer to be mapped. 2061 * @flags: unsigned long variable to store irq enable status 2062 * @copy_in: copy in from user buffer 2063 * 2064 * Prepare buffer for simulated SCSI commands. 2065 * 2066 * LOCKING: 2067 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 2068 * 2069 * RETURNS: 2070 * Pointer to response buffer. 2071 */ 2072 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 2073 unsigned long *flags) 2074 { 2075 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 2076 2077 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 2078 if (copy_in) 2079 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2080 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2081 return ata_scsi_rbuf; 2082 } 2083 2084 /** 2085 * ata_scsi_rbuf_put - Unmap response buffer. 2086 * @cmd: SCSI command containing buffer to be unmapped. 2087 * @copy_out: copy out result 2088 * @flags: @flags passed to ata_scsi_rbuf_get() 2089 * 2090 * Returns rbuf buffer. The result is copied to @cmd's buffer if 2091 * @copy_back is true. 2092 * 2093 * LOCKING: 2094 * Unlocks ata_scsi_rbuf_lock. 2095 */ 2096 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 2097 unsigned long *flags) 2098 { 2099 if (copy_out) 2100 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2101 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2102 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 2103 } 2104 2105 /** 2106 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 2107 * @args: device IDENTIFY data / SCSI command of interest. 2108 * @actor: Callback hook for desired SCSI command simulator 2109 * 2110 * Takes care of the hard work of simulating a SCSI command... 2111 * Mapping the response buffer, calling the command's handler, 2112 * and handling the handler's return value. This return value 2113 * indicates whether the handler wishes the SCSI command to be 2114 * completed successfully (0), or not (in which case cmd->result 2115 * and sense buffer are assumed to be set). 2116 * 2117 * LOCKING: 2118 * spin_lock_irqsave(host lock) 2119 */ 2120 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 2121 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 2122 { 2123 u8 *rbuf; 2124 unsigned int rc; 2125 struct scsi_cmnd *cmd = args->cmd; 2126 unsigned long flags; 2127 2128 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 2129 rc = actor(args, rbuf); 2130 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 2131 2132 if (rc == 0) 2133 cmd->result = SAM_STAT_GOOD; 2134 } 2135 2136 /** 2137 * ata_scsiop_inq_std - Simulate INQUIRY command 2138 * @args: device IDENTIFY data / SCSI command of interest. 2139 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2140 * 2141 * Returns standard device identification data associated 2142 * with non-VPD INQUIRY command output. 2143 * 2144 * LOCKING: 2145 * spin_lock_irqsave(host lock) 2146 */ 2147 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 2148 { 2149 static const u8 versions[] = { 2150 0x00, 2151 0x60, /* SAM-3 (no version claimed) */ 2152 2153 0x03, 2154 0x20, /* SBC-2 (no version claimed) */ 2155 2156 0x03, 2157 0x00 /* SPC-3 (no version claimed) */ 2158 }; 2159 static const u8 versions_zbc[] = { 2160 0x00, 2161 0xA0, /* SAM-5 (no version claimed) */ 2162 2163 0x06, 2164 0x00, /* SBC-4 (no version claimed) */ 2165 2166 0x05, 2167 0xC0, /* SPC-5 (no version claimed) */ 2168 2169 0x60, 2170 0x24, /* ZBC r05 */ 2171 }; 2172 2173 u8 hdr[] = { 2174 TYPE_DISK, 2175 0, 2176 0x5, /* claim SPC-3 version compatibility */ 2177 2, 2178 95 - 4, 2179 0, 2180 0, 2181 2 2182 }; 2183 2184 VPRINTK("ENTER\n"); 2185 2186 /* set scsi removable (RMB) bit per ata bit, or if the 2187 * AHCI port says it's external (Hotplug-capable, eSATA). 2188 */ 2189 if (ata_id_removable(args->id) || 2190 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 2191 hdr[1] |= (1 << 7); 2192 2193 if (args->dev->class == ATA_DEV_ZAC) { 2194 hdr[0] = TYPE_ZBC; 2195 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 2196 } 2197 2198 memcpy(rbuf, hdr, sizeof(hdr)); 2199 memcpy(&rbuf[8], "ATA ", 8); 2200 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 2201 2202 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2203 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2204 if (strncmp(&rbuf[32], " ", 4) == 0) 2205 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2206 2207 if (rbuf[32] == 0 || rbuf[32] == ' ') 2208 memcpy(&rbuf[32], "n/a ", 4); 2209 2210 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 2211 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2212 else 2213 memcpy(rbuf + 58, versions, sizeof(versions)); 2214 2215 return 0; 2216 } 2217 2218 /** 2219 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2220 * @args: device IDENTIFY data / SCSI command of interest. 2221 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2222 * 2223 * Returns list of inquiry VPD pages available. 2224 * 2225 * LOCKING: 2226 * spin_lock_irqsave(host lock) 2227 */ 2228 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 2229 { 2230 int num_pages; 2231 static const u8 pages[] = { 2232 0x00, /* page 0x00, this page */ 2233 0x80, /* page 0x80, unit serial no page */ 2234 0x83, /* page 0x83, device ident page */ 2235 0x89, /* page 0x89, ata info page */ 2236 0xb0, /* page 0xb0, block limits page */ 2237 0xb1, /* page 0xb1, block device characteristics page */ 2238 0xb2, /* page 0xb2, thin provisioning page */ 2239 0xb6, /* page 0xb6, zoned block device characteristics */ 2240 }; 2241 2242 num_pages = sizeof(pages); 2243 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 2244 num_pages--; 2245 rbuf[3] = num_pages; /* number of supported VPD pages */ 2246 memcpy(rbuf + 4, pages, num_pages); 2247 return 0; 2248 } 2249 2250 /** 2251 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2252 * @args: device IDENTIFY data / SCSI command of interest. 2253 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2254 * 2255 * Returns ATA device serial number. 2256 * 2257 * LOCKING: 2258 * spin_lock_irqsave(host lock) 2259 */ 2260 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2261 { 2262 static const u8 hdr[] = { 2263 0, 2264 0x80, /* this page code */ 2265 0, 2266 ATA_ID_SERNO_LEN, /* page len */ 2267 }; 2268 2269 memcpy(rbuf, hdr, sizeof(hdr)); 2270 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2271 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2272 return 0; 2273 } 2274 2275 /** 2276 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2277 * @args: device IDENTIFY data / SCSI command of interest. 2278 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2279 * 2280 * Yields two logical unit device identification designators: 2281 * - vendor specific ASCII containing the ATA serial number 2282 * - SAT defined "t10 vendor id based" containing ASCII vendor 2283 * name ("ATA "), model and serial numbers. 2284 * 2285 * LOCKING: 2286 * spin_lock_irqsave(host lock) 2287 */ 2288 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2289 { 2290 const int sat_model_serial_desc_len = 68; 2291 int num; 2292 2293 rbuf[1] = 0x83; /* this page code */ 2294 num = 4; 2295 2296 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2297 rbuf[num + 0] = 2; 2298 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2299 num += 4; 2300 ata_id_string(args->id, (unsigned char *) rbuf + num, 2301 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2302 num += ATA_ID_SERNO_LEN; 2303 2304 /* SAT defined lu model and serial numbers descriptor */ 2305 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2306 rbuf[num + 0] = 2; 2307 rbuf[num + 1] = 1; 2308 rbuf[num + 3] = sat_model_serial_desc_len; 2309 num += 4; 2310 memcpy(rbuf + num, "ATA ", 8); 2311 num += 8; 2312 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2313 ATA_ID_PROD_LEN); 2314 num += ATA_ID_PROD_LEN; 2315 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2316 ATA_ID_SERNO_LEN); 2317 num += ATA_ID_SERNO_LEN; 2318 2319 if (ata_id_has_wwn(args->id)) { 2320 /* SAT defined lu world wide name */ 2321 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2322 rbuf[num + 0] = 1; 2323 rbuf[num + 1] = 3; 2324 rbuf[num + 3] = ATA_ID_WWN_LEN; 2325 num += 4; 2326 ata_id_string(args->id, (unsigned char *) rbuf + num, 2327 ATA_ID_WWN, ATA_ID_WWN_LEN); 2328 num += ATA_ID_WWN_LEN; 2329 } 2330 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2331 return 0; 2332 } 2333 2334 /** 2335 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2336 * @args: device IDENTIFY data / SCSI command of interest. 2337 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2338 * 2339 * Yields SAT-specified ATA VPD page. 2340 * 2341 * LOCKING: 2342 * spin_lock_irqsave(host lock) 2343 */ 2344 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2345 { 2346 struct ata_taskfile tf; 2347 2348 memset(&tf, 0, sizeof(tf)); 2349 2350 rbuf[1] = 0x89; /* our page code */ 2351 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2352 rbuf[3] = (0x238 & 0xff); 2353 2354 memcpy(&rbuf[8], "linux ", 8); 2355 memcpy(&rbuf[16], "libata ", 16); 2356 memcpy(&rbuf[32], DRV_VERSION, 4); 2357 2358 /* we don't store the ATA device signature, so we fake it */ 2359 2360 tf.command = ATA_DRDY; /* really, this is Status reg */ 2361 tf.lbal = 0x1; 2362 tf.nsect = 0x1; 2363 2364 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2365 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2366 2367 rbuf[56] = ATA_CMD_ID_ATA; 2368 2369 memcpy(&rbuf[60], &args->id[0], 512); 2370 return 0; 2371 } 2372 2373 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2374 { 2375 u16 min_io_sectors; 2376 2377 rbuf[1] = 0xb0; 2378 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2379 2380 /* 2381 * Optimal transfer length granularity. 2382 * 2383 * This is always one physical block, but for disks with a smaller 2384 * logical than physical sector size we need to figure out what the 2385 * latter is. 2386 */ 2387 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2388 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2389 2390 /* 2391 * Optimal unmap granularity. 2392 * 2393 * The ATA spec doesn't even know about a granularity or alignment 2394 * for the TRIM command. We can leave away most of the unmap related 2395 * VPD page entries, but we have specifify a granularity to signal 2396 * that we support some form of unmap - in thise case via WRITE SAME 2397 * with the unmap bit set. 2398 */ 2399 if (ata_id_has_trim(args->id)) { 2400 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); 2401 put_unaligned_be32(1, &rbuf[28]); 2402 } 2403 2404 return 0; 2405 } 2406 2407 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2408 { 2409 int form_factor = ata_id_form_factor(args->id); 2410 int media_rotation_rate = ata_id_rotation_rate(args->id); 2411 u8 zoned = ata_id_zoned_cap(args->id); 2412 2413 rbuf[1] = 0xb1; 2414 rbuf[3] = 0x3c; 2415 rbuf[4] = media_rotation_rate >> 8; 2416 rbuf[5] = media_rotation_rate; 2417 rbuf[7] = form_factor; 2418 if (zoned) 2419 rbuf[8] = (zoned << 4); 2420 2421 return 0; 2422 } 2423 2424 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2425 { 2426 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2427 rbuf[1] = 0xb2; 2428 rbuf[3] = 0x4; 2429 rbuf[5] = 1 << 6; /* TPWS */ 2430 2431 return 0; 2432 } 2433 2434 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2435 { 2436 /* 2437 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2438 */ 2439 rbuf[1] = 0xb6; 2440 rbuf[3] = 0x3C; 2441 2442 /* 2443 * URSWRZ bit is only meaningful for host-managed ZAC drives 2444 */ 2445 if (args->dev->zac_zoned_cap & 1) 2446 rbuf[4] |= 1; 2447 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2448 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2449 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2450 2451 return 0; 2452 } 2453 2454 /** 2455 * modecpy - Prepare response for MODE SENSE 2456 * @dest: output buffer 2457 * @src: data being copied 2458 * @n: length of mode page 2459 * @changeable: whether changeable parameters are requested 2460 * 2461 * Generate a generic MODE SENSE page for either current or changeable 2462 * parameters. 2463 * 2464 * LOCKING: 2465 * None. 2466 */ 2467 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2468 { 2469 if (changeable) { 2470 memcpy(dest, src, 2); 2471 memset(dest + 2, 0, n - 2); 2472 } else { 2473 memcpy(dest, src, n); 2474 } 2475 } 2476 2477 /** 2478 * ata_msense_caching - Simulate MODE SENSE caching info page 2479 * @id: device IDENTIFY data 2480 * @buf: output buffer 2481 * @changeable: whether changeable parameters are requested 2482 * 2483 * Generate a caching info page, which conditionally indicates 2484 * write caching to the SCSI layer, depending on device 2485 * capabilities. 2486 * 2487 * LOCKING: 2488 * None. 2489 */ 2490 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2491 { 2492 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2493 if (changeable) { 2494 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2495 } else { 2496 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2497 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2498 } 2499 return sizeof(def_cache_mpage); 2500 } 2501 2502 /** 2503 * ata_msense_control - Simulate MODE SENSE control mode page 2504 * @dev: ATA device of interest 2505 * @buf: output buffer 2506 * @changeable: whether changeable parameters are requested 2507 * 2508 * Generate a generic MODE SENSE control mode page. 2509 * 2510 * LOCKING: 2511 * None. 2512 */ 2513 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2514 bool changeable) 2515 { 2516 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2517 if (changeable) { 2518 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2519 } else { 2520 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2521 2522 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2523 } 2524 return sizeof(def_control_mpage); 2525 } 2526 2527 /** 2528 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2529 * @buf: output buffer 2530 * @changeable: whether changeable parameters are requested 2531 * 2532 * Generate a generic MODE SENSE r/w error recovery page. 2533 * 2534 * LOCKING: 2535 * None. 2536 */ 2537 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2538 { 2539 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2540 changeable); 2541 return sizeof(def_rw_recovery_mpage); 2542 } 2543 2544 /* 2545 * We can turn this into a real blacklist if it's needed, for now just 2546 * blacklist any Maxtor BANC1G10 revision firmware 2547 */ 2548 static int ata_dev_supports_fua(u16 *id) 2549 { 2550 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2551 2552 if (!libata_fua) 2553 return 0; 2554 if (!ata_id_has_fua(id)) 2555 return 0; 2556 2557 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2558 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2559 2560 if (strcmp(model, "Maxtor")) 2561 return 1; 2562 if (strcmp(fw, "BANC1G10")) 2563 return 1; 2564 2565 return 0; /* blacklisted */ 2566 } 2567 2568 /** 2569 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2570 * @args: device IDENTIFY data / SCSI command of interest. 2571 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2572 * 2573 * Simulate MODE SENSE commands. Assume this is invoked for direct 2574 * access devices (e.g. disks) only. There should be no block 2575 * descriptor for other device types. 2576 * 2577 * LOCKING: 2578 * spin_lock_irqsave(host lock) 2579 */ 2580 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2581 { 2582 struct ata_device *dev = args->dev; 2583 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2584 static const u8 sat_blk_desc[] = { 2585 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2586 0, 2587 0, 0x2, 0x0 /* block length: 512 bytes */ 2588 }; 2589 u8 pg, spg; 2590 unsigned int ebd, page_control, six_byte; 2591 u8 dpofua, bp = 0xff; 2592 u16 fp; 2593 2594 VPRINTK("ENTER\n"); 2595 2596 six_byte = (scsicmd[0] == MODE_SENSE); 2597 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2598 /* 2599 * LLBA bit in msense(10) ignored (compliant) 2600 */ 2601 2602 page_control = scsicmd[2] >> 6; 2603 switch (page_control) { 2604 case 0: /* current */ 2605 case 1: /* changeable */ 2606 case 2: /* defaults */ 2607 break; /* supported */ 2608 case 3: /* saved */ 2609 goto saving_not_supp; 2610 default: 2611 fp = 2; 2612 bp = 6; 2613 goto invalid_fld; 2614 } 2615 2616 if (six_byte) 2617 p += 4 + (ebd ? 8 : 0); 2618 else 2619 p += 8 + (ebd ? 8 : 0); 2620 2621 pg = scsicmd[2] & 0x3f; 2622 spg = scsicmd[3]; 2623 /* 2624 * No mode subpages supported (yet) but asking for _all_ 2625 * subpages may be valid 2626 */ 2627 if (spg && (spg != ALL_SUB_MPAGES)) { 2628 fp = 3; 2629 goto invalid_fld; 2630 } 2631 2632 switch(pg) { 2633 case RW_RECOVERY_MPAGE: 2634 p += ata_msense_rw_recovery(p, page_control == 1); 2635 break; 2636 2637 case CACHE_MPAGE: 2638 p += ata_msense_caching(args->id, p, page_control == 1); 2639 break; 2640 2641 case CONTROL_MPAGE: 2642 p += ata_msense_control(args->dev, p, page_control == 1); 2643 break; 2644 2645 case ALL_MPAGES: 2646 p += ata_msense_rw_recovery(p, page_control == 1); 2647 p += ata_msense_caching(args->id, p, page_control == 1); 2648 p += ata_msense_control(args->dev, p, page_control == 1); 2649 break; 2650 2651 default: /* invalid page code */ 2652 fp = 2; 2653 goto invalid_fld; 2654 } 2655 2656 dpofua = 0; 2657 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2658 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2659 dpofua = 1 << 4; 2660 2661 if (six_byte) { 2662 rbuf[0] = p - rbuf - 1; 2663 rbuf[2] |= dpofua; 2664 if (ebd) { 2665 rbuf[3] = sizeof(sat_blk_desc); 2666 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2667 } 2668 } else { 2669 unsigned int output_len = p - rbuf - 2; 2670 2671 rbuf[0] = output_len >> 8; 2672 rbuf[1] = output_len; 2673 rbuf[3] |= dpofua; 2674 if (ebd) { 2675 rbuf[7] = sizeof(sat_blk_desc); 2676 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2677 } 2678 } 2679 return 0; 2680 2681 invalid_fld: 2682 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2683 return 1; 2684 2685 saving_not_supp: 2686 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2687 /* "Saving parameters not supported" */ 2688 return 1; 2689 } 2690 2691 /** 2692 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2693 * @args: device IDENTIFY data / SCSI command of interest. 2694 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2695 * 2696 * Simulate READ CAPACITY commands. 2697 * 2698 * LOCKING: 2699 * None. 2700 */ 2701 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2702 { 2703 struct ata_device *dev = args->dev; 2704 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2705 u32 sector_size; /* physical sector size in bytes */ 2706 u8 log2_per_phys; 2707 u16 lowest_aligned; 2708 2709 sector_size = ata_id_logical_sector_size(dev->id); 2710 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2711 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2712 2713 VPRINTK("ENTER\n"); 2714 2715 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2716 if (last_lba >= 0xffffffffULL) 2717 last_lba = 0xffffffff; 2718 2719 /* sector count, 32-bit */ 2720 rbuf[0] = last_lba >> (8 * 3); 2721 rbuf[1] = last_lba >> (8 * 2); 2722 rbuf[2] = last_lba >> (8 * 1); 2723 rbuf[3] = last_lba; 2724 2725 /* sector size */ 2726 rbuf[4] = sector_size >> (8 * 3); 2727 rbuf[5] = sector_size >> (8 * 2); 2728 rbuf[6] = sector_size >> (8 * 1); 2729 rbuf[7] = sector_size; 2730 } else { 2731 /* sector count, 64-bit */ 2732 rbuf[0] = last_lba >> (8 * 7); 2733 rbuf[1] = last_lba >> (8 * 6); 2734 rbuf[2] = last_lba >> (8 * 5); 2735 rbuf[3] = last_lba >> (8 * 4); 2736 rbuf[4] = last_lba >> (8 * 3); 2737 rbuf[5] = last_lba >> (8 * 2); 2738 rbuf[6] = last_lba >> (8 * 1); 2739 rbuf[7] = last_lba; 2740 2741 /* sector size */ 2742 rbuf[ 8] = sector_size >> (8 * 3); 2743 rbuf[ 9] = sector_size >> (8 * 2); 2744 rbuf[10] = sector_size >> (8 * 1); 2745 rbuf[11] = sector_size; 2746 2747 rbuf[12] = 0; 2748 rbuf[13] = log2_per_phys; 2749 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2750 rbuf[15] = lowest_aligned; 2751 2752 if (ata_id_has_trim(args->id) && 2753 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2754 rbuf[14] |= 0x80; /* LBPME */ 2755 2756 if (ata_id_has_zero_after_trim(args->id) && 2757 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2758 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2759 rbuf[14] |= 0x40; /* LBPRZ */ 2760 } 2761 } 2762 if (ata_id_zoned_cap(args->id) || 2763 args->dev->class == ATA_DEV_ZAC) 2764 rbuf[12] = (1 << 4); /* RC_BASIS */ 2765 } 2766 return 0; 2767 } 2768 2769 /** 2770 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2771 * @args: device IDENTIFY data / SCSI command of interest. 2772 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2773 * 2774 * Simulate REPORT LUNS command. 2775 * 2776 * LOCKING: 2777 * spin_lock_irqsave(host lock) 2778 */ 2779 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2780 { 2781 VPRINTK("ENTER\n"); 2782 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2783 2784 return 0; 2785 } 2786 2787 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2788 { 2789 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2790 /* FIXME: not quite right; we don't want the 2791 * translation of taskfile registers into 2792 * a sense descriptors, since that's only 2793 * correct for ATA, not ATAPI 2794 */ 2795 ata_gen_passthru_sense(qc); 2796 } 2797 2798 ata_qc_done(qc); 2799 } 2800 2801 /* is it pointless to prefer PIO for "safety reasons"? */ 2802 static inline int ata_pio_use_silly(struct ata_port *ap) 2803 { 2804 return (ap->flags & ATA_FLAG_PIO_DMA); 2805 } 2806 2807 static void atapi_request_sense(struct ata_queued_cmd *qc) 2808 { 2809 struct ata_port *ap = qc->ap; 2810 struct scsi_cmnd *cmd = qc->scsicmd; 2811 2812 DPRINTK("ATAPI request sense\n"); 2813 2814 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2815 2816 #ifdef CONFIG_ATA_SFF 2817 if (ap->ops->sff_tf_read) 2818 ap->ops->sff_tf_read(ap, &qc->tf); 2819 #endif 2820 2821 /* fill these in, for the case where they are -not- overwritten */ 2822 cmd->sense_buffer[0] = 0x70; 2823 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2824 2825 ata_qc_reinit(qc); 2826 2827 /* setup sg table and init transfer direction */ 2828 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2829 ata_sg_init(qc, &qc->sgent, 1); 2830 qc->dma_dir = DMA_FROM_DEVICE; 2831 2832 memset(&qc->cdb, 0, qc->dev->cdb_len); 2833 qc->cdb[0] = REQUEST_SENSE; 2834 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2835 2836 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2837 qc->tf.command = ATA_CMD_PACKET; 2838 2839 if (ata_pio_use_silly(ap)) { 2840 qc->tf.protocol = ATAPI_PROT_DMA; 2841 qc->tf.feature |= ATAPI_PKT_DMA; 2842 } else { 2843 qc->tf.protocol = ATAPI_PROT_PIO; 2844 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2845 qc->tf.lbah = 0; 2846 } 2847 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2848 2849 qc->complete_fn = atapi_sense_complete; 2850 2851 ata_qc_issue(qc); 2852 2853 DPRINTK("EXIT\n"); 2854 } 2855 2856 /* 2857 * ATAPI devices typically report zero for their SCSI version, and sometimes 2858 * deviate from the spec WRT response data format. If SCSI version is 2859 * reported as zero like normal, then we make the following fixups: 2860 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2861 * modern device. 2862 * 2) Ensure response data format / ATAPI information are always correct. 2863 */ 2864 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2865 { 2866 u8 buf[4]; 2867 2868 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2869 if (buf[2] == 0) { 2870 buf[2] = 0x5; 2871 buf[3] = 0x32; 2872 } 2873 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2874 } 2875 2876 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2877 { 2878 struct scsi_cmnd *cmd = qc->scsicmd; 2879 unsigned int err_mask = qc->err_mask; 2880 2881 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2882 2883 /* handle completion from new EH */ 2884 if (unlikely(qc->ap->ops->error_handler && 2885 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2886 2887 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2888 /* FIXME: not quite right; we don't want the 2889 * translation of taskfile registers into a 2890 * sense descriptors, since that's only 2891 * correct for ATA, not ATAPI 2892 */ 2893 ata_gen_passthru_sense(qc); 2894 } 2895 2896 /* SCSI EH automatically locks door if sdev->locked is 2897 * set. Sometimes door lock request continues to 2898 * fail, for example, when no media is present. This 2899 * creates a loop - SCSI EH issues door lock which 2900 * fails and gets invoked again to acquire sense data 2901 * for the failed command. 2902 * 2903 * If door lock fails, always clear sdev->locked to 2904 * avoid this infinite loop. 2905 * 2906 * This may happen before SCSI scan is complete. Make 2907 * sure qc->dev->sdev isn't NULL before dereferencing. 2908 */ 2909 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2910 qc->dev->sdev->locked = 0; 2911 2912 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2913 ata_qc_done(qc); 2914 return; 2915 } 2916 2917 /* successful completion or old EH failure path */ 2918 if (unlikely(err_mask & AC_ERR_DEV)) { 2919 cmd->result = SAM_STAT_CHECK_CONDITION; 2920 atapi_request_sense(qc); 2921 return; 2922 } else if (unlikely(err_mask)) { 2923 /* FIXME: not quite right; we don't want the 2924 * translation of taskfile registers into 2925 * a sense descriptors, since that's only 2926 * correct for ATA, not ATAPI 2927 */ 2928 ata_gen_passthru_sense(qc); 2929 } else { 2930 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2931 atapi_fixup_inquiry(cmd); 2932 cmd->result = SAM_STAT_GOOD; 2933 } 2934 2935 ata_qc_done(qc); 2936 } 2937 /** 2938 * atapi_xlat - Initialize PACKET taskfile 2939 * @qc: command structure to be initialized 2940 * 2941 * LOCKING: 2942 * spin_lock_irqsave(host lock) 2943 * 2944 * RETURNS: 2945 * Zero on success, non-zero on failure. 2946 */ 2947 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2948 { 2949 struct scsi_cmnd *scmd = qc->scsicmd; 2950 struct ata_device *dev = qc->dev; 2951 int nodata = (scmd->sc_data_direction == DMA_NONE); 2952 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2953 unsigned int nbytes; 2954 2955 memset(qc->cdb, 0, dev->cdb_len); 2956 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2957 2958 qc->complete_fn = atapi_qc_complete; 2959 2960 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2961 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2962 qc->tf.flags |= ATA_TFLAG_WRITE; 2963 DPRINTK("direction: write\n"); 2964 } 2965 2966 qc->tf.command = ATA_CMD_PACKET; 2967 ata_qc_set_pc_nbytes(qc); 2968 2969 /* check whether ATAPI DMA is safe */ 2970 if (!nodata && !using_pio && atapi_check_dma(qc)) 2971 using_pio = 1; 2972 2973 /* Some controller variants snoop this value for Packet 2974 * transfers to do state machine and FIFO management. Thus we 2975 * want to set it properly, and for DMA where it is 2976 * effectively meaningless. 2977 */ 2978 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2979 2980 /* Most ATAPI devices which honor transfer chunk size don't 2981 * behave according to the spec when odd chunk size which 2982 * matches the transfer length is specified. If the number of 2983 * bytes to transfer is 2n+1. According to the spec, what 2984 * should happen is to indicate that 2n+1 is going to be 2985 * transferred and transfer 2n+2 bytes where the last byte is 2986 * padding. 2987 * 2988 * In practice, this doesn't happen. ATAPI devices first 2989 * indicate and transfer 2n bytes and then indicate and 2990 * transfer 2 bytes where the last byte is padding. 2991 * 2992 * This inconsistency confuses several controllers which 2993 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2994 * These controllers use actual number of transferred bytes to 2995 * update DMA poitner and transfer of 4n+2 bytes make those 2996 * controller push DMA pointer by 4n+4 bytes because SATA data 2997 * FISes are aligned to 4 bytes. This causes data corruption 2998 * and buffer overrun. 2999 * 3000 * Always setting nbytes to even number solves this problem 3001 * because then ATAPI devices don't have to split data at 2n 3002 * boundaries. 3003 */ 3004 if (nbytes & 0x1) 3005 nbytes++; 3006 3007 qc->tf.lbam = (nbytes & 0xFF); 3008 qc->tf.lbah = (nbytes >> 8); 3009 3010 if (nodata) 3011 qc->tf.protocol = ATAPI_PROT_NODATA; 3012 else if (using_pio) 3013 qc->tf.protocol = ATAPI_PROT_PIO; 3014 else { 3015 /* DMA data xfer */ 3016 qc->tf.protocol = ATAPI_PROT_DMA; 3017 qc->tf.feature |= ATAPI_PKT_DMA; 3018 3019 if ((dev->flags & ATA_DFLAG_DMADIR) && 3020 (scmd->sc_data_direction != DMA_TO_DEVICE)) 3021 /* some SATA bridges need us to indicate data xfer direction */ 3022 qc->tf.feature |= ATAPI_DMADIR; 3023 } 3024 3025 3026 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 3027 as ATAPI tape drives don't get this right otherwise */ 3028 return 0; 3029 } 3030 3031 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 3032 { 3033 if (!sata_pmp_attached(ap)) { 3034 if (likely(devno >= 0 && 3035 devno < ata_link_max_devices(&ap->link))) 3036 return &ap->link.device[devno]; 3037 } else { 3038 if (likely(devno >= 0 && 3039 devno < ap->nr_pmp_links)) 3040 return &ap->pmp_link[devno].device[0]; 3041 } 3042 3043 return NULL; 3044 } 3045 3046 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 3047 const struct scsi_device *scsidev) 3048 { 3049 int devno; 3050 3051 /* skip commands not addressed to targets we simulate */ 3052 if (!sata_pmp_attached(ap)) { 3053 if (unlikely(scsidev->channel || scsidev->lun)) 3054 return NULL; 3055 devno = scsidev->id; 3056 } else { 3057 if (unlikely(scsidev->id || scsidev->lun)) 3058 return NULL; 3059 devno = scsidev->channel; 3060 } 3061 3062 return ata_find_dev(ap, devno); 3063 } 3064 3065 /** 3066 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3067 * @ap: ATA port to which the device is attached 3068 * @scsidev: SCSI device from which we derive the ATA device 3069 * 3070 * Given various information provided in struct scsi_cmnd, 3071 * map that onto an ATA bus, and using that mapping 3072 * determine which ata_device is associated with the 3073 * SCSI command to be sent. 3074 * 3075 * LOCKING: 3076 * spin_lock_irqsave(host lock) 3077 * 3078 * RETURNS: 3079 * Associated ATA device, or %NULL if not found. 3080 */ 3081 static struct ata_device * 3082 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3083 { 3084 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3085 3086 if (unlikely(!dev || !ata_dev_enabled(dev))) 3087 return NULL; 3088 3089 return dev; 3090 } 3091 3092 /* 3093 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3094 * @byte1: Byte 1 from pass-thru CDB. 3095 * 3096 * RETURNS: 3097 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3098 */ 3099 static u8 3100 ata_scsi_map_proto(u8 byte1) 3101 { 3102 switch((byte1 & 0x1e) >> 1) { 3103 case 3: /* Non-data */ 3104 return ATA_PROT_NODATA; 3105 3106 case 6: /* DMA */ 3107 case 10: /* UDMA Data-in */ 3108 case 11: /* UDMA Data-Out */ 3109 return ATA_PROT_DMA; 3110 3111 case 4: /* PIO Data-in */ 3112 case 5: /* PIO Data-out */ 3113 return ATA_PROT_PIO; 3114 3115 case 12: /* FPDMA */ 3116 return ATA_PROT_NCQ; 3117 3118 case 0: /* Hard Reset */ 3119 case 1: /* SRST */ 3120 case 8: /* Device Diagnostic */ 3121 case 9: /* Device Reset */ 3122 case 7: /* DMA Queued */ 3123 case 15: /* Return Response Info */ 3124 default: /* Reserved */ 3125 break; 3126 } 3127 3128 return ATA_PROT_UNKNOWN; 3129 } 3130 3131 /** 3132 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3133 * @qc: command structure to be initialized 3134 * 3135 * Handles either 12, 16, or 32-byte versions of the CDB. 3136 * 3137 * RETURNS: 3138 * Zero on success, non-zero on failure. 3139 */ 3140 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3141 { 3142 struct ata_taskfile *tf = &(qc->tf); 3143 struct scsi_cmnd *scmd = qc->scsicmd; 3144 struct ata_device *dev = qc->dev; 3145 const u8 *cdb = scmd->cmnd; 3146 u16 fp; 3147 u16 cdb_offset = 0; 3148 3149 /* 7Fh variable length cmd means a ata pass-thru(32) */ 3150 if (cdb[0] == VARIABLE_LENGTH_CMD) 3151 cdb_offset = 9; 3152 3153 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]); 3154 if (tf->protocol == ATA_PROT_UNKNOWN) { 3155 fp = 1; 3156 goto invalid_fld; 3157 } 3158 3159 if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0) 3160 tf->protocol = ATA_PROT_NCQ_NODATA; 3161 3162 /* enable LBA */ 3163 tf->flags |= ATA_TFLAG_LBA; 3164 3165 /* 3166 * 12 and 16 byte CDBs use different offsets to 3167 * provide the various register values. 3168 */ 3169 if (cdb[0] == ATA_16) { 3170 /* 3171 * 16-byte CDB - may contain extended commands. 3172 * 3173 * If that is the case, copy the upper byte register values. 3174 */ 3175 if (cdb[1] & 0x01) { 3176 tf->hob_feature = cdb[3]; 3177 tf->hob_nsect = cdb[5]; 3178 tf->hob_lbal = cdb[7]; 3179 tf->hob_lbam = cdb[9]; 3180 tf->hob_lbah = cdb[11]; 3181 tf->flags |= ATA_TFLAG_LBA48; 3182 } else 3183 tf->flags &= ~ATA_TFLAG_LBA48; 3184 3185 /* 3186 * Always copy low byte, device and command registers. 3187 */ 3188 tf->feature = cdb[4]; 3189 tf->nsect = cdb[6]; 3190 tf->lbal = cdb[8]; 3191 tf->lbam = cdb[10]; 3192 tf->lbah = cdb[12]; 3193 tf->device = cdb[13]; 3194 tf->command = cdb[14]; 3195 } else if (cdb[0] == ATA_12) { 3196 /* 3197 * 12-byte CDB - incapable of extended commands. 3198 */ 3199 tf->flags &= ~ATA_TFLAG_LBA48; 3200 3201 tf->feature = cdb[3]; 3202 tf->nsect = cdb[4]; 3203 tf->lbal = cdb[5]; 3204 tf->lbam = cdb[6]; 3205 tf->lbah = cdb[7]; 3206 tf->device = cdb[8]; 3207 tf->command = cdb[9]; 3208 } else { 3209 /* 3210 * 32-byte CDB - may contain extended command fields. 3211 * 3212 * If that is the case, copy the upper byte register values. 3213 */ 3214 if (cdb[10] & 0x01) { 3215 tf->hob_feature = cdb[20]; 3216 tf->hob_nsect = cdb[22]; 3217 tf->hob_lbal = cdb[16]; 3218 tf->hob_lbam = cdb[15]; 3219 tf->hob_lbah = cdb[14]; 3220 tf->flags |= ATA_TFLAG_LBA48; 3221 } else 3222 tf->flags &= ~ATA_TFLAG_LBA48; 3223 3224 tf->feature = cdb[21]; 3225 tf->nsect = cdb[23]; 3226 tf->lbal = cdb[19]; 3227 tf->lbam = cdb[18]; 3228 tf->lbah = cdb[17]; 3229 tf->device = cdb[24]; 3230 tf->command = cdb[25]; 3231 tf->auxiliary = get_unaligned_be32(&cdb[28]); 3232 } 3233 3234 /* For NCQ commands copy the tag value */ 3235 if (ata_is_ncq(tf->protocol)) 3236 tf->nsect = qc->tag << 3; 3237 3238 /* enforce correct master/slave bit */ 3239 tf->device = dev->devno ? 3240 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3241 3242 switch (tf->command) { 3243 /* READ/WRITE LONG use a non-standard sect_size */ 3244 case ATA_CMD_READ_LONG: 3245 case ATA_CMD_READ_LONG_ONCE: 3246 case ATA_CMD_WRITE_LONG: 3247 case ATA_CMD_WRITE_LONG_ONCE: 3248 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3249 fp = 1; 3250 goto invalid_fld; 3251 } 3252 qc->sect_size = scsi_bufflen(scmd); 3253 break; 3254 3255 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3256 case ATA_CMD_CFA_WRITE_NE: 3257 case ATA_CMD_CFA_TRANS_SECT: 3258 case ATA_CMD_CFA_WRITE_MULT_NE: 3259 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3260 case ATA_CMD_READ: 3261 case ATA_CMD_READ_EXT: 3262 case ATA_CMD_READ_QUEUED: 3263 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3264 case ATA_CMD_FPDMA_READ: 3265 case ATA_CMD_READ_MULTI: 3266 case ATA_CMD_READ_MULTI_EXT: 3267 case ATA_CMD_PIO_READ: 3268 case ATA_CMD_PIO_READ_EXT: 3269 case ATA_CMD_READ_STREAM_DMA_EXT: 3270 case ATA_CMD_READ_STREAM_EXT: 3271 case ATA_CMD_VERIFY: 3272 case ATA_CMD_VERIFY_EXT: 3273 case ATA_CMD_WRITE: 3274 case ATA_CMD_WRITE_EXT: 3275 case ATA_CMD_WRITE_FUA_EXT: 3276 case ATA_CMD_WRITE_QUEUED: 3277 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3278 case ATA_CMD_FPDMA_WRITE: 3279 case ATA_CMD_WRITE_MULTI: 3280 case ATA_CMD_WRITE_MULTI_EXT: 3281 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3282 case ATA_CMD_PIO_WRITE: 3283 case ATA_CMD_PIO_WRITE_EXT: 3284 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3285 case ATA_CMD_WRITE_STREAM_EXT: 3286 qc->sect_size = scmd->device->sector_size; 3287 break; 3288 3289 /* Everything else uses 512 byte "sectors" */ 3290 default: 3291 qc->sect_size = ATA_SECT_SIZE; 3292 } 3293 3294 /* 3295 * Set flags so that all registers will be written, pass on 3296 * write indication (used for PIO/DMA setup), result TF is 3297 * copied back and we don't whine too much about its failure. 3298 */ 3299 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3300 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3301 tf->flags |= ATA_TFLAG_WRITE; 3302 3303 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3304 3305 /* 3306 * Set transfer length. 3307 * 3308 * TODO: find out if we need to do more here to 3309 * cover scatter/gather case. 3310 */ 3311 ata_qc_set_pc_nbytes(qc); 3312 3313 /* We may not issue DMA commands if no DMA mode is set */ 3314 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3315 fp = 1; 3316 goto invalid_fld; 3317 } 3318 3319 /* sanity check for pio multi commands */ 3320 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3321 fp = 1; 3322 goto invalid_fld; 3323 } 3324 3325 if (is_multi_taskfile(tf)) { 3326 unsigned int multi_count = 1 << (cdb[1] >> 5); 3327 3328 /* compare the passed through multi_count 3329 * with the cached multi_count of libata 3330 */ 3331 if (multi_count != dev->multi_count) 3332 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3333 multi_count); 3334 } 3335 3336 /* 3337 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3338 * SET_FEATURES - XFER MODE must be preceded/succeeded 3339 * by an update to hardware-specific registers for each 3340 * controller (i.e. the reason for ->set_piomode(), 3341 * ->set_dmamode(), and ->post_set_mode() hooks). 3342 */ 3343 if (tf->command == ATA_CMD_SET_FEATURES && 3344 tf->feature == SETFEATURES_XFER) { 3345 fp = (cdb[0] == ATA_16) ? 4 : 3; 3346 goto invalid_fld; 3347 } 3348 3349 /* 3350 * Filter TPM commands by default. These provide an 3351 * essentially uncontrolled encrypted "back door" between 3352 * applications and the disk. Set libata.allow_tpm=1 if you 3353 * have a real reason for wanting to use them. This ensures 3354 * that installed software cannot easily mess stuff up without 3355 * user intent. DVR type users will probably ship with this enabled 3356 * for movie content management. 3357 * 3358 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3359 * for this and should do in future but that it is not sufficient as 3360 * DCS is an optional feature set. Thus we also do the software filter 3361 * so that we comply with the TC consortium stated goal that the user 3362 * can turn off TC features of their system. 3363 */ 3364 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3365 fp = (cdb[0] == ATA_16) ? 14 : 9; 3366 goto invalid_fld; 3367 } 3368 3369 return 0; 3370 3371 invalid_fld: 3372 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3373 return 1; 3374 } 3375 3376 /** 3377 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3378 * @cmd: SCSI command being translated 3379 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3380 * @sector: Starting sector 3381 * @count: Total Range of request in logical sectors 3382 * 3383 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3384 * descriptor. 3385 * 3386 * Upto 64 entries of the format: 3387 * 63:48 Range Length 3388 * 47:0 LBA 3389 * 3390 * Range Length of 0 is ignored. 3391 * LBA's should be sorted order and not overlap. 3392 * 3393 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3394 * 3395 * Return: Number of bytes copied into sglist. 3396 */ 3397 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3398 u64 sector, u32 count) 3399 { 3400 struct scsi_device *sdp = cmd->device; 3401 size_t len = sdp->sector_size; 3402 size_t r; 3403 __le64 *buf; 3404 u32 i = 0; 3405 unsigned long flags; 3406 3407 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3408 3409 if (len > ATA_SCSI_RBUF_SIZE) 3410 len = ATA_SCSI_RBUF_SIZE; 3411 3412 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3413 buf = ((void *)ata_scsi_rbuf); 3414 memset(buf, 0, len); 3415 while (i < trmax) { 3416 u64 entry = sector | 3417 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3418 buf[i++] = __cpu_to_le64(entry); 3419 if (count <= 0xffff) 3420 break; 3421 count -= 0xffff; 3422 sector += 0xffff; 3423 } 3424 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3425 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3426 3427 return r; 3428 } 3429 3430 /** 3431 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3432 * @qc: Command to be translated 3433 * 3434 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3435 * an SCT Write Same command. 3436 * Based on WRITE SAME has the UNMAP flag: 3437 * 3438 * - When set translate to DSM TRIM 3439 * - When clear translate to SCT Write Same 3440 */ 3441 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3442 { 3443 struct ata_taskfile *tf = &qc->tf; 3444 struct scsi_cmnd *scmd = qc->scsicmd; 3445 struct scsi_device *sdp = scmd->device; 3446 size_t len = sdp->sector_size; 3447 struct ata_device *dev = qc->dev; 3448 const u8 *cdb = scmd->cmnd; 3449 u64 block; 3450 u32 n_block; 3451 const u32 trmax = len >> 3; 3452 u32 size; 3453 u16 fp; 3454 u8 bp = 0xff; 3455 u8 unmap = cdb[1] & 0x8; 3456 3457 /* we may not issue DMA commands if no DMA mode is set */ 3458 if (unlikely(!dev->dma_mode)) 3459 goto invalid_opcode; 3460 3461 /* 3462 * We only allow sending this command through the block layer, 3463 * as it modifies the DATA OUT buffer, which would corrupt user 3464 * memory for SG_IO commands. 3465 */ 3466 if (unlikely(blk_rq_is_passthrough(scmd->request))) 3467 goto invalid_opcode; 3468 3469 if (unlikely(scmd->cmd_len < 16)) { 3470 fp = 15; 3471 goto invalid_fld; 3472 } 3473 scsi_16_lba_len(cdb, &block, &n_block); 3474 3475 if (!unmap || 3476 (dev->horkage & ATA_HORKAGE_NOTRIM) || 3477 !ata_id_has_trim(dev->id)) { 3478 fp = 1; 3479 bp = 3; 3480 goto invalid_fld; 3481 } 3482 /* If the request is too large the cmd is invalid */ 3483 if (n_block > 0xffff * trmax) { 3484 fp = 2; 3485 goto invalid_fld; 3486 } 3487 3488 /* 3489 * WRITE SAME always has a sector sized buffer as payload, this 3490 * should never be a multiple entry S/G list. 3491 */ 3492 if (!scsi_sg_count(scmd)) 3493 goto invalid_param_len; 3494 3495 /* 3496 * size must match sector size in bytes 3497 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3498 * is defined as number of 512 byte blocks to be transferred. 3499 */ 3500 3501 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3502 if (size != len) 3503 goto invalid_param_len; 3504 3505 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3506 /* Newer devices support queued TRIM commands */ 3507 tf->protocol = ATA_PROT_NCQ; 3508 tf->command = ATA_CMD_FPDMA_SEND; 3509 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3510 tf->nsect = qc->tag << 3; 3511 tf->hob_feature = (size / 512) >> 8; 3512 tf->feature = size / 512; 3513 3514 tf->auxiliary = 1; 3515 } else { 3516 tf->protocol = ATA_PROT_DMA; 3517 tf->hob_feature = 0; 3518 tf->feature = ATA_DSM_TRIM; 3519 tf->hob_nsect = (size / 512) >> 8; 3520 tf->nsect = size / 512; 3521 tf->command = ATA_CMD_DSM; 3522 } 3523 3524 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3525 ATA_TFLAG_WRITE; 3526 3527 ata_qc_set_pc_nbytes(qc); 3528 3529 return 0; 3530 3531 invalid_fld: 3532 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3533 return 1; 3534 invalid_param_len: 3535 /* "Parameter list length error" */ 3536 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3537 return 1; 3538 invalid_opcode: 3539 /* "Invalid command operation code" */ 3540 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3541 return 1; 3542 } 3543 3544 /** 3545 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3546 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3547 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3548 * 3549 * Yields a subset to satisfy scsi_report_opcode() 3550 * 3551 * LOCKING: 3552 * spin_lock_irqsave(host lock) 3553 */ 3554 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3555 { 3556 struct ata_device *dev = args->dev; 3557 u8 *cdb = args->cmd->cmnd; 3558 u8 supported = 0; 3559 unsigned int err = 0; 3560 3561 if (cdb[2] != 1) { 3562 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3563 err = 2; 3564 goto out; 3565 } 3566 switch (cdb[3]) { 3567 case INQUIRY: 3568 case MODE_SENSE: 3569 case MODE_SENSE_10: 3570 case READ_CAPACITY: 3571 case SERVICE_ACTION_IN_16: 3572 case REPORT_LUNS: 3573 case REQUEST_SENSE: 3574 case SYNCHRONIZE_CACHE: 3575 case REZERO_UNIT: 3576 case SEEK_6: 3577 case SEEK_10: 3578 case TEST_UNIT_READY: 3579 case SEND_DIAGNOSTIC: 3580 case MAINTENANCE_IN: 3581 case READ_6: 3582 case READ_10: 3583 case READ_16: 3584 case WRITE_6: 3585 case WRITE_10: 3586 case WRITE_16: 3587 case ATA_12: 3588 case ATA_16: 3589 case VERIFY: 3590 case VERIFY_16: 3591 case MODE_SELECT: 3592 case MODE_SELECT_10: 3593 case START_STOP: 3594 supported = 3; 3595 break; 3596 case ZBC_IN: 3597 case ZBC_OUT: 3598 if (ata_id_zoned_cap(dev->id) || 3599 dev->class == ATA_DEV_ZAC) 3600 supported = 3; 3601 break; 3602 case SECURITY_PROTOCOL_IN: 3603 case SECURITY_PROTOCOL_OUT: 3604 if (dev->flags & ATA_DFLAG_TRUSTED) 3605 supported = 3; 3606 break; 3607 default: 3608 break; 3609 } 3610 out: 3611 rbuf[1] = supported; /* supported */ 3612 return err; 3613 } 3614 3615 /** 3616 * ata_scsi_report_zones_complete - convert ATA output 3617 * @qc: command structure returning the data 3618 * 3619 * Convert T-13 little-endian field representation into 3620 * T-10 big-endian field representation. 3621 * What a mess. 3622 */ 3623 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3624 { 3625 struct scsi_cmnd *scmd = qc->scsicmd; 3626 struct sg_mapping_iter miter; 3627 unsigned long flags; 3628 unsigned int bytes = 0; 3629 3630 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3631 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3632 3633 local_irq_save(flags); 3634 while (sg_miter_next(&miter)) { 3635 unsigned int offset = 0; 3636 3637 if (bytes == 0) { 3638 char *hdr; 3639 u32 list_length; 3640 u64 max_lba, opt_lba; 3641 u16 same; 3642 3643 /* Swizzle header */ 3644 hdr = miter.addr; 3645 list_length = get_unaligned_le32(&hdr[0]); 3646 same = get_unaligned_le16(&hdr[4]); 3647 max_lba = get_unaligned_le64(&hdr[8]); 3648 opt_lba = get_unaligned_le64(&hdr[16]); 3649 put_unaligned_be32(list_length, &hdr[0]); 3650 hdr[4] = same & 0xf; 3651 put_unaligned_be64(max_lba, &hdr[8]); 3652 put_unaligned_be64(opt_lba, &hdr[16]); 3653 offset += 64; 3654 bytes += 64; 3655 } 3656 while (offset < miter.length) { 3657 char *rec; 3658 u8 cond, type, non_seq, reset; 3659 u64 size, start, wp; 3660 3661 /* Swizzle zone descriptor */ 3662 rec = miter.addr + offset; 3663 type = rec[0] & 0xf; 3664 cond = (rec[1] >> 4) & 0xf; 3665 non_seq = (rec[1] & 2); 3666 reset = (rec[1] & 1); 3667 size = get_unaligned_le64(&rec[8]); 3668 start = get_unaligned_le64(&rec[16]); 3669 wp = get_unaligned_le64(&rec[24]); 3670 rec[0] = type; 3671 rec[1] = (cond << 4) | non_seq | reset; 3672 put_unaligned_be64(size, &rec[8]); 3673 put_unaligned_be64(start, &rec[16]); 3674 put_unaligned_be64(wp, &rec[24]); 3675 WARN_ON(offset + 64 > miter.length); 3676 offset += 64; 3677 bytes += 64; 3678 } 3679 } 3680 sg_miter_stop(&miter); 3681 local_irq_restore(flags); 3682 3683 ata_scsi_qc_complete(qc); 3684 } 3685 3686 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3687 { 3688 struct ata_taskfile *tf = &qc->tf; 3689 struct scsi_cmnd *scmd = qc->scsicmd; 3690 const u8 *cdb = scmd->cmnd; 3691 u16 sect, fp = (u16)-1; 3692 u8 sa, options, bp = 0xff; 3693 u64 block; 3694 u32 n_block; 3695 3696 if (unlikely(scmd->cmd_len < 16)) { 3697 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3698 scmd->cmd_len); 3699 fp = 15; 3700 goto invalid_fld; 3701 } 3702 scsi_16_lba_len(cdb, &block, &n_block); 3703 if (n_block != scsi_bufflen(scmd)) { 3704 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3705 n_block, scsi_bufflen(scmd)); 3706 goto invalid_param_len; 3707 } 3708 sa = cdb[1] & 0x1f; 3709 if (sa != ZI_REPORT_ZONES) { 3710 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3711 fp = 1; 3712 goto invalid_fld; 3713 } 3714 /* 3715 * ZAC allows only for transfers in 512 byte blocks, 3716 * and uses a 16 bit value for the transfer count. 3717 */ 3718 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3719 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3720 goto invalid_param_len; 3721 } 3722 sect = n_block / 512; 3723 options = cdb[14] & 0xbf; 3724 3725 if (ata_ncq_enabled(qc->dev) && 3726 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3727 tf->protocol = ATA_PROT_NCQ; 3728 tf->command = ATA_CMD_FPDMA_RECV; 3729 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3730 tf->nsect = qc->tag << 3; 3731 tf->feature = sect & 0xff; 3732 tf->hob_feature = (sect >> 8) & 0xff; 3733 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3734 } else { 3735 tf->command = ATA_CMD_ZAC_MGMT_IN; 3736 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3737 tf->protocol = ATA_PROT_DMA; 3738 tf->hob_feature = options; 3739 tf->hob_nsect = (sect >> 8) & 0xff; 3740 tf->nsect = sect & 0xff; 3741 } 3742 tf->device = ATA_LBA; 3743 tf->lbah = (block >> 16) & 0xff; 3744 tf->lbam = (block >> 8) & 0xff; 3745 tf->lbal = block & 0xff; 3746 tf->hob_lbah = (block >> 40) & 0xff; 3747 tf->hob_lbam = (block >> 32) & 0xff; 3748 tf->hob_lbal = (block >> 24) & 0xff; 3749 3750 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3751 qc->flags |= ATA_QCFLAG_RESULT_TF; 3752 3753 ata_qc_set_pc_nbytes(qc); 3754 3755 qc->complete_fn = ata_scsi_report_zones_complete; 3756 3757 return 0; 3758 3759 invalid_fld: 3760 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3761 return 1; 3762 3763 invalid_param_len: 3764 /* "Parameter list length error" */ 3765 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3766 return 1; 3767 } 3768 3769 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3770 { 3771 struct ata_taskfile *tf = &qc->tf; 3772 struct scsi_cmnd *scmd = qc->scsicmd; 3773 struct ata_device *dev = qc->dev; 3774 const u8 *cdb = scmd->cmnd; 3775 u8 all, sa; 3776 u64 block; 3777 u32 n_block; 3778 u16 fp = (u16)-1; 3779 3780 if (unlikely(scmd->cmd_len < 16)) { 3781 fp = 15; 3782 goto invalid_fld; 3783 } 3784 3785 sa = cdb[1] & 0x1f; 3786 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3787 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3788 fp = 1; 3789 goto invalid_fld; 3790 } 3791 3792 scsi_16_lba_len(cdb, &block, &n_block); 3793 if (n_block) { 3794 /* 3795 * ZAC MANAGEMENT OUT doesn't define any length 3796 */ 3797 goto invalid_param_len; 3798 } 3799 if (block > dev->n_sectors) 3800 goto out_of_range; 3801 3802 all = cdb[14] & 0x1; 3803 3804 if (ata_ncq_enabled(qc->dev) && 3805 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3806 tf->protocol = ATA_PROT_NCQ_NODATA; 3807 tf->command = ATA_CMD_NCQ_NON_DATA; 3808 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3809 tf->nsect = qc->tag << 3; 3810 tf->auxiliary = sa | ((u16)all << 8); 3811 } else { 3812 tf->protocol = ATA_PROT_NODATA; 3813 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3814 tf->feature = sa; 3815 tf->hob_feature = all; 3816 } 3817 tf->lbah = (block >> 16) & 0xff; 3818 tf->lbam = (block >> 8) & 0xff; 3819 tf->lbal = block & 0xff; 3820 tf->hob_lbah = (block >> 40) & 0xff; 3821 tf->hob_lbam = (block >> 32) & 0xff; 3822 tf->hob_lbal = (block >> 24) & 0xff; 3823 tf->device = ATA_LBA; 3824 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3825 3826 return 0; 3827 3828 invalid_fld: 3829 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3830 return 1; 3831 out_of_range: 3832 /* "Logical Block Address out of range" */ 3833 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00); 3834 return 1; 3835 invalid_param_len: 3836 /* "Parameter list length error" */ 3837 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3838 return 1; 3839 } 3840 3841 /** 3842 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3843 * @qc: Storage for translated ATA taskfile 3844 * @buf: input buffer 3845 * @len: number of valid bytes in the input buffer 3846 * @fp: out parameter for the failed field on error 3847 * 3848 * Prepare a taskfile to modify caching information for the device. 3849 * 3850 * LOCKING: 3851 * None. 3852 */ 3853 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3854 const u8 *buf, int len, u16 *fp) 3855 { 3856 struct ata_taskfile *tf = &qc->tf; 3857 struct ata_device *dev = qc->dev; 3858 u8 mpage[CACHE_MPAGE_LEN]; 3859 u8 wce; 3860 int i; 3861 3862 /* 3863 * The first two bytes of def_cache_mpage are a header, so offsets 3864 * in mpage are off by 2 compared to buf. Same for len. 3865 */ 3866 3867 if (len != CACHE_MPAGE_LEN - 2) { 3868 if (len < CACHE_MPAGE_LEN - 2) 3869 *fp = len; 3870 else 3871 *fp = CACHE_MPAGE_LEN - 2; 3872 return -EINVAL; 3873 } 3874 3875 wce = buf[0] & (1 << 2); 3876 3877 /* 3878 * Check that read-only bits are not modified. 3879 */ 3880 ata_msense_caching(dev->id, mpage, false); 3881 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3882 if (i == 0) 3883 continue; 3884 if (mpage[i + 2] != buf[i]) { 3885 *fp = i; 3886 return -EINVAL; 3887 } 3888 } 3889 3890 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3891 tf->protocol = ATA_PROT_NODATA; 3892 tf->nsect = 0; 3893 tf->command = ATA_CMD_SET_FEATURES; 3894 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3895 return 0; 3896 } 3897 3898 /** 3899 * ata_mselect_control - Simulate MODE SELECT for control page 3900 * @qc: Storage for translated ATA taskfile 3901 * @buf: input buffer 3902 * @len: number of valid bytes in the input buffer 3903 * @fp: out parameter for the failed field on error 3904 * 3905 * Prepare a taskfile to modify caching information for the device. 3906 * 3907 * LOCKING: 3908 * None. 3909 */ 3910 static int ata_mselect_control(struct ata_queued_cmd *qc, 3911 const u8 *buf, int len, u16 *fp) 3912 { 3913 struct ata_device *dev = qc->dev; 3914 u8 mpage[CONTROL_MPAGE_LEN]; 3915 u8 d_sense; 3916 int i; 3917 3918 /* 3919 * The first two bytes of def_control_mpage are a header, so offsets 3920 * in mpage are off by 2 compared to buf. Same for len. 3921 */ 3922 3923 if (len != CONTROL_MPAGE_LEN - 2) { 3924 if (len < CONTROL_MPAGE_LEN - 2) 3925 *fp = len; 3926 else 3927 *fp = CONTROL_MPAGE_LEN - 2; 3928 return -EINVAL; 3929 } 3930 3931 d_sense = buf[0] & (1 << 2); 3932 3933 /* 3934 * Check that read-only bits are not modified. 3935 */ 3936 ata_msense_control(dev, mpage, false); 3937 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3938 if (i == 0) 3939 continue; 3940 if (mpage[2 + i] != buf[i]) { 3941 *fp = i; 3942 return -EINVAL; 3943 } 3944 } 3945 if (d_sense & (1 << 2)) 3946 dev->flags |= ATA_DFLAG_D_SENSE; 3947 else 3948 dev->flags &= ~ATA_DFLAG_D_SENSE; 3949 return 0; 3950 } 3951 3952 /** 3953 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands 3954 * @qc: Storage for translated ATA taskfile 3955 * 3956 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3957 * Assume this is invoked for direct access devices (e.g. disks) only. 3958 * There should be no block descriptor for other device types. 3959 * 3960 * LOCKING: 3961 * spin_lock_irqsave(host lock) 3962 */ 3963 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3964 { 3965 struct scsi_cmnd *scmd = qc->scsicmd; 3966 const u8 *cdb = scmd->cmnd; 3967 const u8 *p; 3968 u8 pg, spg; 3969 unsigned six_byte, pg_len, hdr_len, bd_len; 3970 int len; 3971 u16 fp = (u16)-1; 3972 u8 bp = 0xff; 3973 3974 VPRINTK("ENTER\n"); 3975 3976 six_byte = (cdb[0] == MODE_SELECT); 3977 if (six_byte) { 3978 if (scmd->cmd_len < 5) { 3979 fp = 4; 3980 goto invalid_fld; 3981 } 3982 3983 len = cdb[4]; 3984 hdr_len = 4; 3985 } else { 3986 if (scmd->cmd_len < 9) { 3987 fp = 8; 3988 goto invalid_fld; 3989 } 3990 3991 len = (cdb[7] << 8) + cdb[8]; 3992 hdr_len = 8; 3993 } 3994 3995 /* We only support PF=1, SP=0. */ 3996 if ((cdb[1] & 0x11) != 0x10) { 3997 fp = 1; 3998 bp = (cdb[1] & 0x01) ? 1 : 5; 3999 goto invalid_fld; 4000 } 4001 4002 /* Test early for possible overrun. */ 4003 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 4004 goto invalid_param_len; 4005 4006 p = page_address(sg_page(scsi_sglist(scmd))); 4007 4008 /* Move past header and block descriptors. */ 4009 if (len < hdr_len) 4010 goto invalid_param_len; 4011 4012 if (six_byte) 4013 bd_len = p[3]; 4014 else 4015 bd_len = (p[6] << 8) + p[7]; 4016 4017 len -= hdr_len; 4018 p += hdr_len; 4019 if (len < bd_len) 4020 goto invalid_param_len; 4021 if (bd_len != 0 && bd_len != 8) { 4022 fp = (six_byte) ? 3 : 6; 4023 fp += bd_len + hdr_len; 4024 goto invalid_param; 4025 } 4026 4027 len -= bd_len; 4028 p += bd_len; 4029 if (len == 0) 4030 goto skip; 4031 4032 /* Parse both possible formats for the mode page headers. */ 4033 pg = p[0] & 0x3f; 4034 if (p[0] & 0x40) { 4035 if (len < 4) 4036 goto invalid_param_len; 4037 4038 spg = p[1]; 4039 pg_len = (p[2] << 8) | p[3]; 4040 p += 4; 4041 len -= 4; 4042 } else { 4043 if (len < 2) 4044 goto invalid_param_len; 4045 4046 spg = 0; 4047 pg_len = p[1]; 4048 p += 2; 4049 len -= 2; 4050 } 4051 4052 /* 4053 * No mode subpages supported (yet) but asking for _all_ 4054 * subpages may be valid 4055 */ 4056 if (spg && (spg != ALL_SUB_MPAGES)) { 4057 fp = (p[0] & 0x40) ? 1 : 0; 4058 fp += hdr_len + bd_len; 4059 goto invalid_param; 4060 } 4061 if (pg_len > len) 4062 goto invalid_param_len; 4063 4064 switch (pg) { 4065 case CACHE_MPAGE: 4066 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4067 fp += hdr_len + bd_len; 4068 goto invalid_param; 4069 } 4070 break; 4071 case CONTROL_MPAGE: 4072 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 4073 fp += hdr_len + bd_len; 4074 goto invalid_param; 4075 } else { 4076 goto skip; /* No ATA command to send */ 4077 } 4078 break; 4079 default: /* invalid page code */ 4080 fp = bd_len + hdr_len; 4081 goto invalid_param; 4082 } 4083 4084 /* 4085 * Only one page has changeable data, so we only support setting one 4086 * page at a time. 4087 */ 4088 if (len > pg_len) 4089 goto invalid_param; 4090 4091 return 0; 4092 4093 invalid_fld: 4094 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4095 return 1; 4096 4097 invalid_param: 4098 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4099 return 1; 4100 4101 invalid_param_len: 4102 /* "Parameter list length error" */ 4103 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4104 return 1; 4105 4106 skip: 4107 scmd->result = SAM_STAT_GOOD; 4108 return 1; 4109 } 4110 4111 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma) 4112 { 4113 if (len == 0) 4114 return ATA_CMD_TRUSTED_NONDATA; 4115 else if (send) 4116 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND; 4117 else 4118 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV; 4119 } 4120 4121 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc) 4122 { 4123 struct scsi_cmnd *scmd = qc->scsicmd; 4124 const u8 *cdb = scmd->cmnd; 4125 struct ata_taskfile *tf = &qc->tf; 4126 u8 secp = cdb[1]; 4127 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT); 4128 u16 spsp = get_unaligned_be16(&cdb[2]); 4129 u32 len = get_unaligned_be32(&cdb[6]); 4130 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO); 4131 4132 /* 4133 * We don't support the ATA "security" protocol. 4134 */ 4135 if (secp == 0xef) { 4136 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0); 4137 return 1; 4138 } 4139 4140 if (cdb[4] & 7) { /* INC_512 */ 4141 if (len > 0xffff) { 4142 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4143 return 1; 4144 } 4145 } else { 4146 if (len > 0x01fffe00) { 4147 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0); 4148 return 1; 4149 } 4150 4151 /* convert to the sector-based ATA addressing */ 4152 len = (len + 511) / 512; 4153 } 4154 4155 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO; 4156 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA; 4157 if (send) 4158 tf->flags |= ATA_TFLAG_WRITE; 4159 tf->command = ata_scsi_trusted_op(len, send, dma); 4160 tf->feature = secp; 4161 tf->lbam = spsp & 0xff; 4162 tf->lbah = spsp >> 8; 4163 4164 if (len) { 4165 tf->nsect = len & 0xff; 4166 tf->lbal = len >> 8; 4167 } else { 4168 if (!send) 4169 tf->lbah = (1 << 7); 4170 } 4171 4172 ata_qc_set_pc_nbytes(qc); 4173 return 0; 4174 } 4175 4176 /** 4177 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler 4178 * @qc: Command to be translated 4179 * 4180 * Translate a SCSI variable length CDB to specified commands. 4181 * It checks a service action value in CDB to call corresponding handler. 4182 * 4183 * RETURNS: 4184 * Zero on success, non-zero on failure 4185 * 4186 */ 4187 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc) 4188 { 4189 struct scsi_cmnd *scmd = qc->scsicmd; 4190 const u8 *cdb = scmd->cmnd; 4191 const u16 sa = get_unaligned_be16(&cdb[8]); 4192 4193 /* 4194 * if service action represents a ata pass-thru(32) command, 4195 * then pass it to ata_scsi_pass_thru handler. 4196 */ 4197 if (sa == ATA_32) 4198 return ata_scsi_pass_thru(qc); 4199 4200 /* unsupported service action */ 4201 return 1; 4202 } 4203 4204 /** 4205 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4206 * @dev: ATA device 4207 * @cmd: SCSI command opcode to consider 4208 * 4209 * Look up the SCSI command given, and determine whether the 4210 * SCSI command is to be translated or simulated. 4211 * 4212 * RETURNS: 4213 * Pointer to translation function if possible, %NULL if not. 4214 */ 4215 4216 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4217 { 4218 switch (cmd) { 4219 case READ_6: 4220 case READ_10: 4221 case READ_16: 4222 4223 case WRITE_6: 4224 case WRITE_10: 4225 case WRITE_16: 4226 return ata_scsi_rw_xlat; 4227 4228 case WRITE_SAME_16: 4229 return ata_scsi_write_same_xlat; 4230 4231 case SYNCHRONIZE_CACHE: 4232 if (ata_try_flush_cache(dev)) 4233 return ata_scsi_flush_xlat; 4234 break; 4235 4236 case VERIFY: 4237 case VERIFY_16: 4238 return ata_scsi_verify_xlat; 4239 4240 case ATA_12: 4241 case ATA_16: 4242 return ata_scsi_pass_thru; 4243 4244 case VARIABLE_LENGTH_CMD: 4245 return ata_scsi_var_len_cdb_xlat; 4246 4247 case MODE_SELECT: 4248 case MODE_SELECT_10: 4249 return ata_scsi_mode_select_xlat; 4250 break; 4251 4252 case ZBC_IN: 4253 return ata_scsi_zbc_in_xlat; 4254 4255 case ZBC_OUT: 4256 return ata_scsi_zbc_out_xlat; 4257 4258 case SECURITY_PROTOCOL_IN: 4259 case SECURITY_PROTOCOL_OUT: 4260 if (!(dev->flags & ATA_DFLAG_TRUSTED)) 4261 break; 4262 return ata_scsi_security_inout_xlat; 4263 4264 case START_STOP: 4265 return ata_scsi_start_stop_xlat; 4266 } 4267 4268 return NULL; 4269 } 4270 4271 /** 4272 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 4273 * @ap: ATA port to which the command was being sent 4274 * @cmd: SCSI command to dump 4275 * 4276 * Prints the contents of a SCSI command via printk(). 4277 */ 4278 4279 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 4280 struct scsi_cmnd *cmd) 4281 { 4282 #ifdef ATA_DEBUG 4283 struct scsi_device *scsidev = cmd->device; 4284 4285 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n", 4286 ap->print_id, 4287 scsidev->channel, scsidev->id, scsidev->lun, 4288 cmd->cmnd); 4289 #endif 4290 } 4291 4292 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 4293 struct ata_device *dev) 4294 { 4295 u8 scsi_op = scmd->cmnd[0]; 4296 ata_xlat_func_t xlat_func; 4297 int rc = 0; 4298 4299 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4300 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 4301 goto bad_cdb_len; 4302 4303 xlat_func = ata_get_xlat_func(dev, scsi_op); 4304 } else { 4305 if (unlikely(!scmd->cmd_len)) 4306 goto bad_cdb_len; 4307 4308 xlat_func = NULL; 4309 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4310 /* relay SCSI command to ATAPI device */ 4311 int len = COMMAND_SIZE(scsi_op); 4312 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 4313 goto bad_cdb_len; 4314 4315 xlat_func = atapi_xlat; 4316 } else { 4317 /* ATA_16 passthru, treat as an ATA command */ 4318 if (unlikely(scmd->cmd_len > 16)) 4319 goto bad_cdb_len; 4320 4321 xlat_func = ata_get_xlat_func(dev, scsi_op); 4322 } 4323 } 4324 4325 if (xlat_func) 4326 rc = ata_scsi_translate(dev, scmd, xlat_func); 4327 else 4328 ata_scsi_simulate(dev, scmd); 4329 4330 return rc; 4331 4332 bad_cdb_len: 4333 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4334 scmd->cmd_len, scsi_op, dev->cdb_len); 4335 scmd->result = DID_ERROR << 16; 4336 scmd->scsi_done(scmd); 4337 return 0; 4338 } 4339 4340 /** 4341 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4342 * @shost: SCSI host of command to be sent 4343 * @cmd: SCSI command to be sent 4344 * 4345 * In some cases, this function translates SCSI commands into 4346 * ATA taskfiles, and queues the taskfiles to be sent to 4347 * hardware. In other cases, this function simulates a 4348 * SCSI device by evaluating and responding to certain 4349 * SCSI commands. This creates the overall effect of 4350 * ATA and ATAPI devices appearing as SCSI devices. 4351 * 4352 * LOCKING: 4353 * ATA host lock 4354 * 4355 * RETURNS: 4356 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4357 * 0 otherwise. 4358 */ 4359 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4360 { 4361 struct ata_port *ap; 4362 struct ata_device *dev; 4363 struct scsi_device *scsidev = cmd->device; 4364 int rc = 0; 4365 unsigned long irq_flags; 4366 4367 ap = ata_shost_to_port(shost); 4368 4369 spin_lock_irqsave(ap->lock, irq_flags); 4370 4371 ata_scsi_dump_cdb(ap, cmd); 4372 4373 dev = ata_scsi_find_dev(ap, scsidev); 4374 if (likely(dev)) 4375 rc = __ata_scsi_queuecmd(cmd, dev); 4376 else { 4377 cmd->result = (DID_BAD_TARGET << 16); 4378 cmd->scsi_done(cmd); 4379 } 4380 4381 spin_unlock_irqrestore(ap->lock, irq_flags); 4382 4383 return rc; 4384 } 4385 4386 /** 4387 * ata_scsi_simulate - simulate SCSI command on ATA device 4388 * @dev: the target device 4389 * @cmd: SCSI command being sent to device. 4390 * 4391 * Interprets and directly executes a select list of SCSI commands 4392 * that can be handled internally. 4393 * 4394 * LOCKING: 4395 * spin_lock_irqsave(host lock) 4396 */ 4397 4398 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4399 { 4400 struct ata_scsi_args args; 4401 const u8 *scsicmd = cmd->cmnd; 4402 u8 tmp8; 4403 4404 args.dev = dev; 4405 args.id = dev->id; 4406 args.cmd = cmd; 4407 4408 switch(scsicmd[0]) { 4409 case INQUIRY: 4410 if (scsicmd[1] & 2) /* is CmdDt set? */ 4411 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4412 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4413 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4414 else switch (scsicmd[2]) { 4415 case 0x00: 4416 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4417 break; 4418 case 0x80: 4419 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4420 break; 4421 case 0x83: 4422 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4423 break; 4424 case 0x89: 4425 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4426 break; 4427 case 0xb0: 4428 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4429 break; 4430 case 0xb1: 4431 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4432 break; 4433 case 0xb2: 4434 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4435 break; 4436 case 0xb6: 4437 if (dev->flags & ATA_DFLAG_ZAC) { 4438 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4439 break; 4440 } 4441 /* Fallthrough */ 4442 default: 4443 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4444 break; 4445 } 4446 break; 4447 4448 case MODE_SENSE: 4449 case MODE_SENSE_10: 4450 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4451 break; 4452 4453 case READ_CAPACITY: 4454 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4455 break; 4456 4457 case SERVICE_ACTION_IN_16: 4458 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4459 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4460 else 4461 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4462 break; 4463 4464 case REPORT_LUNS: 4465 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4466 break; 4467 4468 case REQUEST_SENSE: 4469 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4470 cmd->result = (DRIVER_SENSE << 24); 4471 break; 4472 4473 /* if we reach this, then writeback caching is disabled, 4474 * turning this into a no-op. 4475 */ 4476 case SYNCHRONIZE_CACHE: 4477 /* fall through */ 4478 4479 /* no-op's, complete with success */ 4480 case REZERO_UNIT: 4481 case SEEK_6: 4482 case SEEK_10: 4483 case TEST_UNIT_READY: 4484 break; 4485 4486 case SEND_DIAGNOSTIC: 4487 tmp8 = scsicmd[1] & ~(1 << 3); 4488 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4489 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4490 break; 4491 4492 case MAINTENANCE_IN: 4493 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4494 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4495 else 4496 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4497 break; 4498 4499 /* all other commands */ 4500 default: 4501 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4502 /* "Invalid command operation code" */ 4503 break; 4504 } 4505 4506 cmd->scsi_done(cmd); 4507 } 4508 4509 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4510 { 4511 int i, rc; 4512 4513 for (i = 0; i < host->n_ports; i++) { 4514 struct ata_port *ap = host->ports[i]; 4515 struct Scsi_Host *shost; 4516 4517 rc = -ENOMEM; 4518 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4519 if (!shost) 4520 goto err_alloc; 4521 4522 shost->eh_noresume = 1; 4523 *(struct ata_port **)&shost->hostdata[0] = ap; 4524 ap->scsi_host = shost; 4525 4526 shost->transportt = ata_scsi_transport_template; 4527 shost->unique_id = ap->print_id; 4528 shost->max_id = 16; 4529 shost->max_lun = 1; 4530 shost->max_channel = 1; 4531 shost->max_cmd_len = 32; 4532 4533 /* Schedule policy is determined by ->qc_defer() 4534 * callback and it needs to see every deferred qc. 4535 * Set host_blocked to 1 to prevent SCSI midlayer from 4536 * automatically deferring requests. 4537 */ 4538 shost->max_host_blocked = 1; 4539 4540 rc = scsi_add_host_with_dma(ap->scsi_host, 4541 &ap->tdev, ap->host->dev); 4542 if (rc) 4543 goto err_add; 4544 } 4545 4546 return 0; 4547 4548 err_add: 4549 scsi_host_put(host->ports[i]->scsi_host); 4550 err_alloc: 4551 while (--i >= 0) { 4552 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4553 4554 scsi_remove_host(shost); 4555 scsi_host_put(shost); 4556 } 4557 return rc; 4558 } 4559 4560 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4561 { 4562 int tries = 5; 4563 struct ata_device *last_failed_dev = NULL; 4564 struct ata_link *link; 4565 struct ata_device *dev; 4566 4567 repeat: 4568 ata_for_each_link(link, ap, EDGE) { 4569 ata_for_each_dev(dev, link, ENABLED) { 4570 struct scsi_device *sdev; 4571 int channel = 0, id = 0; 4572 4573 if (dev->sdev) 4574 continue; 4575 4576 if (ata_is_host_link(link)) 4577 id = dev->devno; 4578 else 4579 channel = link->pmp; 4580 4581 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4582 NULL); 4583 if (!IS_ERR(sdev)) { 4584 dev->sdev = sdev; 4585 scsi_device_put(sdev); 4586 } else { 4587 dev->sdev = NULL; 4588 } 4589 } 4590 } 4591 4592 /* If we scanned while EH was in progress or allocation 4593 * failure occurred, scan would have failed silently. Check 4594 * whether all devices are attached. 4595 */ 4596 ata_for_each_link(link, ap, EDGE) { 4597 ata_for_each_dev(dev, link, ENABLED) { 4598 if (!dev->sdev) 4599 goto exit_loop; 4600 } 4601 } 4602 exit_loop: 4603 if (!link) 4604 return; 4605 4606 /* we're missing some SCSI devices */ 4607 if (sync) { 4608 /* If caller requested synchrnous scan && we've made 4609 * any progress, sleep briefly and repeat. 4610 */ 4611 if (dev != last_failed_dev) { 4612 msleep(100); 4613 last_failed_dev = dev; 4614 goto repeat; 4615 } 4616 4617 /* We might be failing to detect boot device, give it 4618 * a few more chances. 4619 */ 4620 if (--tries) { 4621 msleep(100); 4622 goto repeat; 4623 } 4624 4625 ata_port_err(ap, 4626 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4627 } 4628 4629 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4630 round_jiffies_relative(HZ)); 4631 } 4632 4633 /** 4634 * ata_scsi_offline_dev - offline attached SCSI device 4635 * @dev: ATA device to offline attached SCSI device for 4636 * 4637 * This function is called from ata_eh_hotplug() and responsible 4638 * for taking the SCSI device attached to @dev offline. This 4639 * function is called with host lock which protects dev->sdev 4640 * against clearing. 4641 * 4642 * LOCKING: 4643 * spin_lock_irqsave(host lock) 4644 * 4645 * RETURNS: 4646 * 1 if attached SCSI device exists, 0 otherwise. 4647 */ 4648 int ata_scsi_offline_dev(struct ata_device *dev) 4649 { 4650 if (dev->sdev) { 4651 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4652 return 1; 4653 } 4654 return 0; 4655 } 4656 4657 /** 4658 * ata_scsi_remove_dev - remove attached SCSI device 4659 * @dev: ATA device to remove attached SCSI device for 4660 * 4661 * This function is called from ata_eh_scsi_hotplug() and 4662 * responsible for removing the SCSI device attached to @dev. 4663 * 4664 * LOCKING: 4665 * Kernel thread context (may sleep). 4666 */ 4667 static void ata_scsi_remove_dev(struct ata_device *dev) 4668 { 4669 struct ata_port *ap = dev->link->ap; 4670 struct scsi_device *sdev; 4671 unsigned long flags; 4672 4673 /* Alas, we need to grab scan_mutex to ensure SCSI device 4674 * state doesn't change underneath us and thus 4675 * scsi_device_get() always succeeds. The mutex locking can 4676 * be removed if there is __scsi_device_get() interface which 4677 * increments reference counts regardless of device state. 4678 */ 4679 mutex_lock(&ap->scsi_host->scan_mutex); 4680 spin_lock_irqsave(ap->lock, flags); 4681 4682 /* clearing dev->sdev is protected by host lock */ 4683 sdev = dev->sdev; 4684 dev->sdev = NULL; 4685 4686 if (sdev) { 4687 /* If user initiated unplug races with us, sdev can go 4688 * away underneath us after the host lock and 4689 * scan_mutex are released. Hold onto it. 4690 */ 4691 if (scsi_device_get(sdev) == 0) { 4692 /* The following ensures the attached sdev is 4693 * offline on return from ata_scsi_offline_dev() 4694 * regardless it wins or loses the race 4695 * against this function. 4696 */ 4697 scsi_device_set_state(sdev, SDEV_OFFLINE); 4698 } else { 4699 WARN_ON(1); 4700 sdev = NULL; 4701 } 4702 } 4703 4704 spin_unlock_irqrestore(ap->lock, flags); 4705 mutex_unlock(&ap->scsi_host->scan_mutex); 4706 4707 if (sdev) { 4708 ata_dev_info(dev, "detaching (SCSI %s)\n", 4709 dev_name(&sdev->sdev_gendev)); 4710 4711 scsi_remove_device(sdev); 4712 scsi_device_put(sdev); 4713 } 4714 } 4715 4716 static void ata_scsi_handle_link_detach(struct ata_link *link) 4717 { 4718 struct ata_port *ap = link->ap; 4719 struct ata_device *dev; 4720 4721 ata_for_each_dev(dev, link, ALL) { 4722 unsigned long flags; 4723 4724 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4725 continue; 4726 4727 spin_lock_irqsave(ap->lock, flags); 4728 dev->flags &= ~ATA_DFLAG_DETACHED; 4729 spin_unlock_irqrestore(ap->lock, flags); 4730 4731 if (zpodd_dev_enabled(dev)) 4732 zpodd_exit(dev); 4733 4734 ata_scsi_remove_dev(dev); 4735 } 4736 } 4737 4738 /** 4739 * ata_scsi_media_change_notify - send media change event 4740 * @dev: Pointer to the disk device with media change event 4741 * 4742 * Tell the block layer to send a media change notification 4743 * event. 4744 * 4745 * LOCKING: 4746 * spin_lock_irqsave(host lock) 4747 */ 4748 void ata_scsi_media_change_notify(struct ata_device *dev) 4749 { 4750 if (dev->sdev) 4751 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4752 GFP_ATOMIC); 4753 } 4754 4755 /** 4756 * ata_scsi_hotplug - SCSI part of hotplug 4757 * @work: Pointer to ATA port to perform SCSI hotplug on 4758 * 4759 * Perform SCSI part of hotplug. It's executed from a separate 4760 * workqueue after EH completes. This is necessary because SCSI 4761 * hot plugging requires working EH and hot unplugging is 4762 * synchronized with hot plugging with a mutex. 4763 * 4764 * LOCKING: 4765 * Kernel thread context (may sleep). 4766 */ 4767 void ata_scsi_hotplug(struct work_struct *work) 4768 { 4769 struct ata_port *ap = 4770 container_of(work, struct ata_port, hotplug_task.work); 4771 int i; 4772 4773 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4774 DPRINTK("ENTER/EXIT - unloading\n"); 4775 return; 4776 } 4777 4778 /* 4779 * XXX - UGLY HACK 4780 * 4781 * The block layer suspend/resume path is fundamentally broken due 4782 * to freezable kthreads and workqueue and may deadlock if a block 4783 * device gets removed while resume is in progress. I don't know 4784 * what the solution is short of removing freezable kthreads and 4785 * workqueues altogether. 4786 * 4787 * The following is an ugly hack to avoid kicking off device 4788 * removal while freezer is active. This is a joke but does avoid 4789 * this particular deadlock scenario. 4790 * 4791 * https://bugzilla.kernel.org/show_bug.cgi?id=62801 4792 * http://marc.info/?l=linux-kernel&m=138695698516487 4793 */ 4794 #ifdef CONFIG_FREEZER 4795 while (pm_freezing) 4796 msleep(10); 4797 #endif 4798 4799 DPRINTK("ENTER\n"); 4800 mutex_lock(&ap->scsi_scan_mutex); 4801 4802 /* Unplug detached devices. We cannot use link iterator here 4803 * because PMP links have to be scanned even if PMP is 4804 * currently not attached. Iterate manually. 4805 */ 4806 ata_scsi_handle_link_detach(&ap->link); 4807 if (ap->pmp_link) 4808 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4809 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4810 4811 /* scan for new ones */ 4812 ata_scsi_scan_host(ap, 0); 4813 4814 mutex_unlock(&ap->scsi_scan_mutex); 4815 DPRINTK("EXIT\n"); 4816 } 4817 4818 /** 4819 * ata_scsi_user_scan - indication for user-initiated bus scan 4820 * @shost: SCSI host to scan 4821 * @channel: Channel to scan 4822 * @id: ID to scan 4823 * @lun: LUN to scan 4824 * 4825 * This function is called when user explicitly requests bus 4826 * scan. Set probe pending flag and invoke EH. 4827 * 4828 * LOCKING: 4829 * SCSI layer (we don't care) 4830 * 4831 * RETURNS: 4832 * Zero. 4833 */ 4834 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4835 unsigned int id, u64 lun) 4836 { 4837 struct ata_port *ap = ata_shost_to_port(shost); 4838 unsigned long flags; 4839 int devno, rc = 0; 4840 4841 if (!ap->ops->error_handler) 4842 return -EOPNOTSUPP; 4843 4844 if (lun != SCAN_WILD_CARD && lun) 4845 return -EINVAL; 4846 4847 if (!sata_pmp_attached(ap)) { 4848 if (channel != SCAN_WILD_CARD && channel) 4849 return -EINVAL; 4850 devno = id; 4851 } else { 4852 if (id != SCAN_WILD_CARD && id) 4853 return -EINVAL; 4854 devno = channel; 4855 } 4856 4857 spin_lock_irqsave(ap->lock, flags); 4858 4859 if (devno == SCAN_WILD_CARD) { 4860 struct ata_link *link; 4861 4862 ata_for_each_link(link, ap, EDGE) { 4863 struct ata_eh_info *ehi = &link->eh_info; 4864 ehi->probe_mask |= ATA_ALL_DEVICES; 4865 ehi->action |= ATA_EH_RESET; 4866 } 4867 } else { 4868 struct ata_device *dev = ata_find_dev(ap, devno); 4869 4870 if (dev) { 4871 struct ata_eh_info *ehi = &dev->link->eh_info; 4872 ehi->probe_mask |= 1 << dev->devno; 4873 ehi->action |= ATA_EH_RESET; 4874 } else 4875 rc = -EINVAL; 4876 } 4877 4878 if (rc == 0) { 4879 ata_port_schedule_eh(ap); 4880 spin_unlock_irqrestore(ap->lock, flags); 4881 ata_port_wait_eh(ap); 4882 } else 4883 spin_unlock_irqrestore(ap->lock, flags); 4884 4885 return rc; 4886 } 4887 4888 /** 4889 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4890 * @work: Pointer to ATA port to perform scsi_rescan_device() 4891 * 4892 * After ATA pass thru (SAT) commands are executed successfully, 4893 * libata need to propagate the changes to SCSI layer. 4894 * 4895 * LOCKING: 4896 * Kernel thread context (may sleep). 4897 */ 4898 void ata_scsi_dev_rescan(struct work_struct *work) 4899 { 4900 struct ata_port *ap = 4901 container_of(work, struct ata_port, scsi_rescan_task); 4902 struct ata_link *link; 4903 struct ata_device *dev; 4904 unsigned long flags; 4905 4906 mutex_lock(&ap->scsi_scan_mutex); 4907 spin_lock_irqsave(ap->lock, flags); 4908 4909 ata_for_each_link(link, ap, EDGE) { 4910 ata_for_each_dev(dev, link, ENABLED) { 4911 struct scsi_device *sdev = dev->sdev; 4912 4913 if (!sdev) 4914 continue; 4915 if (scsi_device_get(sdev)) 4916 continue; 4917 4918 spin_unlock_irqrestore(ap->lock, flags); 4919 scsi_rescan_device(&(sdev->sdev_gendev)); 4920 scsi_device_put(sdev); 4921 spin_lock_irqsave(ap->lock, flags); 4922 } 4923 } 4924 4925 spin_unlock_irqrestore(ap->lock, flags); 4926 mutex_unlock(&ap->scsi_scan_mutex); 4927 } 4928 4929 /** 4930 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 4931 * @host: ATA host container for all SAS ports 4932 * @port_info: Information from low-level host driver 4933 * @shost: SCSI host that the scsi device is attached to 4934 * 4935 * LOCKING: 4936 * PCI/etc. bus probe sem. 4937 * 4938 * RETURNS: 4939 * ata_port pointer on success / NULL on failure. 4940 */ 4941 4942 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 4943 struct ata_port_info *port_info, 4944 struct Scsi_Host *shost) 4945 { 4946 struct ata_port *ap; 4947 4948 ap = ata_port_alloc(host); 4949 if (!ap) 4950 return NULL; 4951 4952 ap->port_no = 0; 4953 ap->lock = &host->lock; 4954 ap->pio_mask = port_info->pio_mask; 4955 ap->mwdma_mask = port_info->mwdma_mask; 4956 ap->udma_mask = port_info->udma_mask; 4957 ap->flags |= port_info->flags; 4958 ap->ops = port_info->port_ops; 4959 ap->cbl = ATA_CBL_SATA; 4960 4961 return ap; 4962 } 4963 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 4964 4965 /** 4966 * ata_sas_port_start - Set port up for dma. 4967 * @ap: Port to initialize 4968 * 4969 * Called just after data structures for each port are 4970 * initialized. 4971 * 4972 * May be used as the port_start() entry in ata_port_operations. 4973 * 4974 * LOCKING: 4975 * Inherited from caller. 4976 */ 4977 int ata_sas_port_start(struct ata_port *ap) 4978 { 4979 /* 4980 * the port is marked as frozen at allocation time, but if we don't 4981 * have new eh, we won't thaw it 4982 */ 4983 if (!ap->ops->error_handler) 4984 ap->pflags &= ~ATA_PFLAG_FROZEN; 4985 return 0; 4986 } 4987 EXPORT_SYMBOL_GPL(ata_sas_port_start); 4988 4989 /** 4990 * ata_port_stop - Undo ata_sas_port_start() 4991 * @ap: Port to shut down 4992 * 4993 * May be used as the port_stop() entry in ata_port_operations. 4994 * 4995 * LOCKING: 4996 * Inherited from caller. 4997 */ 4998 4999 void ata_sas_port_stop(struct ata_port *ap) 5000 { 5001 } 5002 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 5003 5004 /** 5005 * ata_sas_async_probe - simply schedule probing and return 5006 * @ap: Port to probe 5007 * 5008 * For batch scheduling of probe for sas attached ata devices, assumes 5009 * the port has already been through ata_sas_port_init() 5010 */ 5011 void ata_sas_async_probe(struct ata_port *ap) 5012 { 5013 __ata_port_probe(ap); 5014 } 5015 EXPORT_SYMBOL_GPL(ata_sas_async_probe); 5016 5017 int ata_sas_sync_probe(struct ata_port *ap) 5018 { 5019 return ata_port_probe(ap); 5020 } 5021 EXPORT_SYMBOL_GPL(ata_sas_sync_probe); 5022 5023 5024 /** 5025 * ata_sas_port_init - Initialize a SATA device 5026 * @ap: SATA port to initialize 5027 * 5028 * LOCKING: 5029 * PCI/etc. bus probe sem. 5030 * 5031 * RETURNS: 5032 * Zero on success, non-zero on error. 5033 */ 5034 5035 int ata_sas_port_init(struct ata_port *ap) 5036 { 5037 int rc = ap->ops->port_start(ap); 5038 5039 if (rc) 5040 return rc; 5041 ap->print_id = atomic_inc_return(&ata_print_id); 5042 return 0; 5043 } 5044 EXPORT_SYMBOL_GPL(ata_sas_port_init); 5045 5046 /** 5047 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 5048 * @ap: SATA port to destroy 5049 * 5050 */ 5051 5052 void ata_sas_port_destroy(struct ata_port *ap) 5053 { 5054 if (ap->ops->port_stop) 5055 ap->ops->port_stop(ap); 5056 kfree(ap); 5057 } 5058 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 5059 5060 /** 5061 * ata_sas_slave_configure - Default slave_config routine for libata devices 5062 * @sdev: SCSI device to configure 5063 * @ap: ATA port to which SCSI device is attached 5064 * 5065 * RETURNS: 5066 * Zero. 5067 */ 5068 5069 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 5070 { 5071 ata_scsi_sdev_config(sdev); 5072 ata_scsi_dev_config(sdev, ap->link.device); 5073 return 0; 5074 } 5075 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 5076 5077 /** 5078 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 5079 * @cmd: SCSI command to be sent 5080 * @ap: ATA port to which the command is being sent 5081 * 5082 * RETURNS: 5083 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 5084 * 0 otherwise. 5085 */ 5086 5087 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 5088 { 5089 int rc = 0; 5090 5091 ata_scsi_dump_cdb(ap, cmd); 5092 5093 if (likely(ata_dev_enabled(ap->link.device))) 5094 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 5095 else { 5096 cmd->result = (DID_BAD_TARGET << 16); 5097 cmd->scsi_done(cmd); 5098 } 5099 return rc; 5100 } 5101 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 5102 5103 int ata_sas_allocate_tag(struct ata_port *ap) 5104 { 5105 unsigned int max_queue = ap->host->n_tags; 5106 unsigned int i, tag; 5107 5108 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) { 5109 tag = tag < max_queue ? tag : 0; 5110 5111 /* the last tag is reserved for internal command. */ 5112 if (tag == ATA_TAG_INTERNAL) 5113 continue; 5114 5115 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) { 5116 ap->sas_last_tag = tag; 5117 return tag; 5118 } 5119 } 5120 return -1; 5121 } 5122 5123 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) 5124 { 5125 clear_bit(tag, &ap->sas_tag_allocated); 5126 } 5127