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/DocBook/libata.* 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_MIN_POWER] = "min_power", 113 }; 114 115 static ssize_t ata_scsi_lpm_store(struct device *device, 116 struct device_attribute *attr, 117 const char *buf, size_t count) 118 { 119 struct Scsi_Host *shost = class_to_shost(device); 120 struct ata_port *ap = ata_shost_to_port(shost); 121 struct ata_link *link; 122 struct ata_device *dev; 123 enum ata_lpm_policy policy; 124 unsigned long flags; 125 126 /* UNKNOWN is internal state, iterate from MAX_POWER */ 127 for (policy = ATA_LPM_MAX_POWER; 128 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) { 129 const char *name = ata_lpm_policy_names[policy]; 130 131 if (strncmp(name, buf, strlen(name)) == 0) 132 break; 133 } 134 if (policy == ARRAY_SIZE(ata_lpm_policy_names)) 135 return -EINVAL; 136 137 spin_lock_irqsave(ap->lock, flags); 138 139 ata_for_each_link(link, ap, EDGE) { 140 ata_for_each_dev(dev, &ap->link, ENABLED) { 141 if (dev->horkage & ATA_HORKAGE_NOLPM) { 142 count = -EOPNOTSUPP; 143 goto out_unlock; 144 } 145 } 146 } 147 148 ap->target_lpm_policy = policy; 149 ata_port_schedule_eh(ap); 150 out_unlock: 151 spin_unlock_irqrestore(ap->lock, flags); 152 return count; 153 } 154 155 static ssize_t ata_scsi_lpm_show(struct device *dev, 156 struct device_attribute *attr, char *buf) 157 { 158 struct Scsi_Host *shost = class_to_shost(dev); 159 struct ata_port *ap = ata_shost_to_port(shost); 160 161 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names)) 162 return -EINVAL; 163 164 return snprintf(buf, PAGE_SIZE, "%s\n", 165 ata_lpm_policy_names[ap->target_lpm_policy]); 166 } 167 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, 168 ata_scsi_lpm_show, ata_scsi_lpm_store); 169 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); 170 171 static ssize_t ata_scsi_park_show(struct device *device, 172 struct device_attribute *attr, char *buf) 173 { 174 struct scsi_device *sdev = to_scsi_device(device); 175 struct ata_port *ap; 176 struct ata_link *link; 177 struct ata_device *dev; 178 unsigned long now; 179 unsigned int uninitialized_var(msecs); 180 int rc = 0; 181 182 ap = ata_shost_to_port(sdev->host); 183 184 spin_lock_irq(ap->lock); 185 dev = ata_scsi_find_dev(ap, sdev); 186 if (!dev) { 187 rc = -ENODEV; 188 goto unlock; 189 } 190 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 191 rc = -EOPNOTSUPP; 192 goto unlock; 193 } 194 195 link = dev->link; 196 now = jiffies; 197 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 198 link->eh_context.unloaded_mask & (1 << dev->devno) && 199 time_after(dev->unpark_deadline, now)) 200 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 201 else 202 msecs = 0; 203 204 unlock: 205 spin_unlock_irq(ap->lock); 206 207 return rc ? rc : snprintf(buf, 20, "%u\n", msecs); 208 } 209 210 static ssize_t ata_scsi_park_store(struct device *device, 211 struct device_attribute *attr, 212 const char *buf, size_t len) 213 { 214 struct scsi_device *sdev = to_scsi_device(device); 215 struct ata_port *ap; 216 struct ata_device *dev; 217 long int input; 218 unsigned long flags; 219 int rc; 220 221 rc = kstrtol(buf, 10, &input); 222 if (rc) 223 return rc; 224 if (input < -2) 225 return -EINVAL; 226 if (input > ATA_TMOUT_MAX_PARK) { 227 rc = -EOVERFLOW; 228 input = ATA_TMOUT_MAX_PARK; 229 } 230 231 ap = ata_shost_to_port(sdev->host); 232 233 spin_lock_irqsave(ap->lock, flags); 234 dev = ata_scsi_find_dev(ap, sdev); 235 if (unlikely(!dev)) { 236 rc = -ENODEV; 237 goto unlock; 238 } 239 if (dev->class != ATA_DEV_ATA && 240 dev->class != ATA_DEV_ZAC) { 241 rc = -EOPNOTSUPP; 242 goto unlock; 243 } 244 245 if (input >= 0) { 246 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 247 rc = -EOPNOTSUPP; 248 goto unlock; 249 } 250 251 dev->unpark_deadline = ata_deadline(jiffies, input); 252 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 253 ata_port_schedule_eh(ap); 254 complete(&ap->park_req_pending); 255 } else { 256 switch (input) { 257 case -1: 258 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 259 break; 260 case -2: 261 dev->flags |= ATA_DFLAG_NO_UNLOAD; 262 break; 263 } 264 } 265 unlock: 266 spin_unlock_irqrestore(ap->lock, flags); 267 268 return rc ? rc : len; 269 } 270 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 271 ata_scsi_park_show, ata_scsi_park_store); 272 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 273 274 static ssize_t ata_ncq_prio_enable_show(struct device *device, 275 struct device_attribute *attr, 276 char *buf) 277 { 278 struct scsi_device *sdev = to_scsi_device(device); 279 struct ata_port *ap; 280 struct ata_device *dev; 281 bool ncq_prio_enable; 282 int rc = 0; 283 284 ap = ata_shost_to_port(sdev->host); 285 286 spin_lock_irq(ap->lock); 287 dev = ata_scsi_find_dev(ap, sdev); 288 if (!dev) { 289 rc = -ENODEV; 290 goto unlock; 291 } 292 293 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE; 294 295 unlock: 296 spin_unlock_irq(ap->lock); 297 298 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable); 299 } 300 301 static ssize_t ata_ncq_prio_enable_store(struct device *device, 302 struct device_attribute *attr, 303 const char *buf, size_t len) 304 { 305 struct scsi_device *sdev = to_scsi_device(device); 306 struct ata_port *ap; 307 struct ata_device *dev; 308 long int input; 309 int rc; 310 311 rc = kstrtol(buf, 10, &input); 312 if (rc) 313 return rc; 314 if ((input < 0) || (input > 1)) 315 return -EINVAL; 316 317 ap = ata_shost_to_port(sdev->host); 318 dev = ata_scsi_find_dev(ap, sdev); 319 if (unlikely(!dev)) 320 return -ENODEV; 321 322 spin_lock_irq(ap->lock); 323 if (input) 324 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE; 325 else 326 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; 327 328 dev->link->eh_info.action |= ATA_EH_REVALIDATE; 329 dev->link->eh_info.flags |= ATA_EHI_QUIET; 330 ata_port_schedule_eh(ap); 331 spin_unlock_irq(ap->lock); 332 333 ata_port_wait_eh(ap); 334 335 if (input) { 336 spin_lock_irq(ap->lock); 337 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) { 338 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; 339 rc = -EIO; 340 } 341 spin_unlock_irq(ap->lock); 342 } 343 344 return rc ? rc : len; 345 } 346 347 DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR, 348 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store); 349 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable); 350 351 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 352 u8 sk, u8 asc, u8 ascq) 353 { 354 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 355 356 if (!cmd) 357 return; 358 359 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 360 361 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq); 362 } 363 364 void ata_scsi_set_sense_information(struct ata_device *dev, 365 struct scsi_cmnd *cmd, 366 const struct ata_taskfile *tf) 367 { 368 u64 information; 369 370 if (!cmd) 371 return; 372 373 information = ata_tf_read_block(tf, dev); 374 if (information == U64_MAX) 375 return; 376 377 scsi_set_sense_information(cmd->sense_buffer, 378 SCSI_SENSE_BUFFERSIZE, information); 379 } 380 381 static void ata_scsi_set_invalid_field(struct ata_device *dev, 382 struct scsi_cmnd *cmd, u16 field, u8 bit) 383 { 384 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 385 /* "Invalid field in CDB" */ 386 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 387 field, bit, 1); 388 } 389 390 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 391 struct scsi_cmnd *cmd, u16 field) 392 { 393 /* "Invalid field in parameter list" */ 394 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 395 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 396 field, 0xff, 0); 397 } 398 399 static ssize_t 400 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, 401 const char *buf, size_t count) 402 { 403 struct Scsi_Host *shost = class_to_shost(dev); 404 struct ata_port *ap = ata_shost_to_port(shost); 405 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) 406 return ap->ops->em_store(ap, buf, count); 407 return -EINVAL; 408 } 409 410 static ssize_t 411 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, 412 char *buf) 413 { 414 struct Scsi_Host *shost = class_to_shost(dev); 415 struct ata_port *ap = ata_shost_to_port(shost); 416 417 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) 418 return ap->ops->em_show(ap, buf); 419 return -EINVAL; 420 } 421 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, 422 ata_scsi_em_message_show, ata_scsi_em_message_store); 423 EXPORT_SYMBOL_GPL(dev_attr_em_message); 424 425 static ssize_t 426 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, 427 char *buf) 428 { 429 struct Scsi_Host *shost = class_to_shost(dev); 430 struct ata_port *ap = ata_shost_to_port(shost); 431 432 return snprintf(buf, 23, "%d\n", ap->em_message_type); 433 } 434 DEVICE_ATTR(em_message_type, S_IRUGO, 435 ata_scsi_em_message_type_show, NULL); 436 EXPORT_SYMBOL_GPL(dev_attr_em_message_type); 437 438 static ssize_t 439 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, 440 char *buf) 441 { 442 struct scsi_device *sdev = to_scsi_device(dev); 443 struct ata_port *ap = ata_shost_to_port(sdev->host); 444 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 445 446 if (atadev && ap->ops->sw_activity_show && 447 (ap->flags & ATA_FLAG_SW_ACTIVITY)) 448 return ap->ops->sw_activity_show(atadev, buf); 449 return -EINVAL; 450 } 451 452 static ssize_t 453 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, 454 const char *buf, size_t count) 455 { 456 struct scsi_device *sdev = to_scsi_device(dev); 457 struct ata_port *ap = ata_shost_to_port(sdev->host); 458 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 459 enum sw_activity val; 460 int rc; 461 462 if (atadev && ap->ops->sw_activity_store && 463 (ap->flags & ATA_FLAG_SW_ACTIVITY)) { 464 val = simple_strtoul(buf, NULL, 0); 465 switch (val) { 466 case OFF: case BLINK_ON: case BLINK_OFF: 467 rc = ap->ops->sw_activity_store(atadev, val); 468 if (!rc) 469 return count; 470 else 471 return rc; 472 } 473 } 474 return -EINVAL; 475 } 476 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, 477 ata_scsi_activity_store); 478 EXPORT_SYMBOL_GPL(dev_attr_sw_activity); 479 480 struct device_attribute *ata_common_sdev_attrs[] = { 481 &dev_attr_unload_heads, 482 &dev_attr_ncq_prio_enable, 483 NULL 484 }; 485 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); 486 487 static void ata_scsi_invalid_field(struct ata_device *dev, 488 struct scsi_cmnd *cmd, u16 field) 489 { 490 ata_scsi_set_invalid_field(dev, cmd, field, 0xff); 491 cmd->scsi_done(cmd); 492 } 493 494 /** 495 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 496 * @sdev: SCSI device for which BIOS geometry is to be determined 497 * @bdev: block device associated with @sdev 498 * @capacity: capacity of SCSI device 499 * @geom: location to which geometry will be output 500 * 501 * Generic bios head/sector/cylinder calculator 502 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 503 * mapping. Some situations may arise where the disk is not 504 * bootable if this is not used. 505 * 506 * LOCKING: 507 * Defined by the SCSI layer. We don't really care. 508 * 509 * RETURNS: 510 * Zero. 511 */ 512 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 513 sector_t capacity, int geom[]) 514 { 515 geom[0] = 255; 516 geom[1] = 63; 517 sector_div(capacity, 255*63); 518 geom[2] = capacity; 519 520 return 0; 521 } 522 523 /** 524 * ata_scsi_unlock_native_capacity - unlock native capacity 525 * @sdev: SCSI device to adjust device capacity for 526 * 527 * This function is called if a partition on @sdev extends beyond 528 * the end of the device. It requests EH to unlock HPA. 529 * 530 * LOCKING: 531 * Defined by the SCSI layer. Might sleep. 532 */ 533 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 534 { 535 struct ata_port *ap = ata_shost_to_port(sdev->host); 536 struct ata_device *dev; 537 unsigned long flags; 538 539 spin_lock_irqsave(ap->lock, flags); 540 541 dev = ata_scsi_find_dev(ap, sdev); 542 if (dev && dev->n_sectors < dev->n_native_sectors) { 543 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 544 dev->link->eh_info.action |= ATA_EH_RESET; 545 ata_port_schedule_eh(ap); 546 } 547 548 spin_unlock_irqrestore(ap->lock, flags); 549 ata_port_wait_eh(ap); 550 } 551 552 /** 553 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 554 * @ap: target port 555 * @sdev: SCSI device to get identify data for 556 * @arg: User buffer area for identify data 557 * 558 * LOCKING: 559 * Defined by the SCSI layer. We don't really care. 560 * 561 * RETURNS: 562 * Zero on success, negative errno on error. 563 */ 564 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 565 void __user *arg) 566 { 567 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 568 u16 __user *dst = arg; 569 char buf[40]; 570 571 if (!dev) 572 return -ENOMSG; 573 574 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 575 return -EFAULT; 576 577 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 578 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 579 return -EFAULT; 580 581 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 582 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 583 return -EFAULT; 584 585 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 586 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 587 return -EFAULT; 588 589 return 0; 590 } 591 592 /** 593 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 594 * @scsidev: Device to which we are issuing command 595 * @arg: User provided data for issuing command 596 * 597 * LOCKING: 598 * Defined by the SCSI layer. We don't really care. 599 * 600 * RETURNS: 601 * Zero on success, negative errno on error. 602 */ 603 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 604 { 605 int rc = 0; 606 u8 scsi_cmd[MAX_COMMAND_SIZE]; 607 u8 args[4], *argbuf = NULL, *sensebuf = NULL; 608 int argsize = 0; 609 enum dma_data_direction data_dir; 610 int cmd_result; 611 612 if (arg == NULL) 613 return -EINVAL; 614 615 if (copy_from_user(args, arg, sizeof(args))) 616 return -EFAULT; 617 618 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 619 if (!sensebuf) 620 return -ENOMEM; 621 622 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 623 624 if (args[3]) { 625 argsize = ATA_SECT_SIZE * args[3]; 626 argbuf = kmalloc(argsize, GFP_KERNEL); 627 if (argbuf == NULL) { 628 rc = -ENOMEM; 629 goto error; 630 } 631 632 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 633 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 634 block count in sector count field */ 635 data_dir = DMA_FROM_DEVICE; 636 } else { 637 scsi_cmd[1] = (3 << 1); /* Non-data */ 638 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 639 data_dir = DMA_NONE; 640 } 641 642 scsi_cmd[0] = ATA_16; 643 644 scsi_cmd[4] = args[2]; 645 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 646 scsi_cmd[6] = args[3]; 647 scsi_cmd[8] = args[1]; 648 scsi_cmd[10] = 0x4f; 649 scsi_cmd[12] = 0xc2; 650 } else { 651 scsi_cmd[6] = args[1]; 652 } 653 scsi_cmd[14] = args[0]; 654 655 /* Good values for timeout and retries? Values below 656 from scsi_ioctl_send_command() for default case... */ 657 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 658 sensebuf, (10*HZ), 5, 0, NULL); 659 660 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 661 u8 *desc = sensebuf + 8; 662 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 663 664 /* If we set cc then ATA pass-through will cause a 665 * check condition even if no error. Filter that. */ 666 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 667 struct scsi_sense_hdr sshdr; 668 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 669 &sshdr); 670 if (sshdr.sense_key == RECOVERED_ERROR && 671 sshdr.asc == 0 && sshdr.ascq == 0x1d) 672 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 673 } 674 675 /* Send userspace a few ATA registers (same as drivers/ide) */ 676 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 677 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 678 args[0] = desc[13]; /* status */ 679 args[1] = desc[3]; /* error */ 680 args[2] = desc[5]; /* sector count (0:7) */ 681 if (copy_to_user(arg, args, sizeof(args))) 682 rc = -EFAULT; 683 } 684 } 685 686 687 if (cmd_result) { 688 rc = -EIO; 689 goto error; 690 } 691 692 if ((argbuf) 693 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 694 rc = -EFAULT; 695 error: 696 kfree(sensebuf); 697 kfree(argbuf); 698 return rc; 699 } 700 701 /** 702 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 703 * @scsidev: Device to which we are issuing command 704 * @arg: User provided data for issuing command 705 * 706 * LOCKING: 707 * Defined by the SCSI layer. We don't really care. 708 * 709 * RETURNS: 710 * Zero on success, negative errno on error. 711 */ 712 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 713 { 714 int rc = 0; 715 u8 scsi_cmd[MAX_COMMAND_SIZE]; 716 u8 args[7], *sensebuf = NULL; 717 int cmd_result; 718 719 if (arg == NULL) 720 return -EINVAL; 721 722 if (copy_from_user(args, arg, sizeof(args))) 723 return -EFAULT; 724 725 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 726 if (!sensebuf) 727 return -ENOMEM; 728 729 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 730 scsi_cmd[0] = ATA_16; 731 scsi_cmd[1] = (3 << 1); /* Non-data */ 732 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 733 scsi_cmd[4] = args[1]; 734 scsi_cmd[6] = args[2]; 735 scsi_cmd[8] = args[3]; 736 scsi_cmd[10] = args[4]; 737 scsi_cmd[12] = args[5]; 738 scsi_cmd[13] = args[6] & 0x4f; 739 scsi_cmd[14] = args[0]; 740 741 /* Good values for timeout and retries? Values below 742 from scsi_ioctl_send_command() for default case... */ 743 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 744 sensebuf, (10*HZ), 5, 0, NULL); 745 746 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 747 u8 *desc = sensebuf + 8; 748 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 749 750 /* If we set cc then ATA pass-through will cause a 751 * check condition even if no error. Filter that. */ 752 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 753 struct scsi_sense_hdr sshdr; 754 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 755 &sshdr); 756 if (sshdr.sense_key == RECOVERED_ERROR && 757 sshdr.asc == 0 && sshdr.ascq == 0x1d) 758 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 759 } 760 761 /* Send userspace ATA registers */ 762 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 763 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 764 args[0] = desc[13]; /* status */ 765 args[1] = desc[3]; /* error */ 766 args[2] = desc[5]; /* sector count (0:7) */ 767 args[3] = desc[7]; /* lbal */ 768 args[4] = desc[9]; /* lbam */ 769 args[5] = desc[11]; /* lbah */ 770 args[6] = desc[12]; /* select */ 771 if (copy_to_user(arg, args, sizeof(args))) 772 rc = -EFAULT; 773 } 774 } 775 776 if (cmd_result) { 777 rc = -EIO; 778 goto error; 779 } 780 781 error: 782 kfree(sensebuf); 783 return rc; 784 } 785 786 static int ata_ioc32(struct ata_port *ap) 787 { 788 if (ap->flags & ATA_FLAG_PIO_DMA) 789 return 1; 790 if (ap->pflags & ATA_PFLAG_PIO32) 791 return 1; 792 return 0; 793 } 794 795 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 796 int cmd, void __user *arg) 797 { 798 unsigned long val; 799 int rc = -EINVAL; 800 unsigned long flags; 801 802 switch (cmd) { 803 case HDIO_GET_32BIT: 804 spin_lock_irqsave(ap->lock, flags); 805 val = ata_ioc32(ap); 806 spin_unlock_irqrestore(ap->lock, flags); 807 return put_user(val, (unsigned long __user *)arg); 808 809 case HDIO_SET_32BIT: 810 val = (unsigned long) arg; 811 rc = 0; 812 spin_lock_irqsave(ap->lock, flags); 813 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 814 if (val) 815 ap->pflags |= ATA_PFLAG_PIO32; 816 else 817 ap->pflags &= ~ATA_PFLAG_PIO32; 818 } else { 819 if (val != ata_ioc32(ap)) 820 rc = -EINVAL; 821 } 822 spin_unlock_irqrestore(ap->lock, flags); 823 return rc; 824 825 case HDIO_GET_IDENTITY: 826 return ata_get_identity(ap, scsidev, arg); 827 828 case HDIO_DRIVE_CMD: 829 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 830 return -EACCES; 831 return ata_cmd_ioctl(scsidev, arg); 832 833 case HDIO_DRIVE_TASK: 834 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 835 return -EACCES; 836 return ata_task_ioctl(scsidev, arg); 837 838 default: 839 rc = -ENOTTY; 840 break; 841 } 842 843 return rc; 844 } 845 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 846 847 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) 848 { 849 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 850 scsidev, cmd, arg); 851 } 852 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 853 854 /** 855 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 856 * @dev: ATA device to which the new command is attached 857 * @cmd: SCSI command that originated this ATA command 858 * 859 * Obtain a reference to an unused ata_queued_cmd structure, 860 * which is the basic libata structure representing a single 861 * ATA command sent to the hardware. 862 * 863 * If a command was available, fill in the SCSI-specific 864 * portions of the structure with information on the 865 * current command. 866 * 867 * LOCKING: 868 * spin_lock_irqsave(host lock) 869 * 870 * RETURNS: 871 * Command allocated, or %NULL if none available. 872 */ 873 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 874 struct scsi_cmnd *cmd) 875 { 876 struct ata_queued_cmd *qc; 877 878 qc = ata_qc_new_init(dev, cmd->request->tag); 879 if (qc) { 880 qc->scsicmd = cmd; 881 qc->scsidone = cmd->scsi_done; 882 883 qc->sg = scsi_sglist(cmd); 884 qc->n_elem = scsi_sg_count(cmd); 885 } else { 886 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 887 cmd->scsi_done(cmd); 888 } 889 890 return qc; 891 } 892 893 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 894 { 895 struct scsi_cmnd *scmd = qc->scsicmd; 896 897 qc->extrabytes = scmd->request->extra_len; 898 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 899 } 900 901 /** 902 * ata_dump_status - user friendly display of error info 903 * @id: id of the port in question 904 * @tf: ptr to filled out taskfile 905 * 906 * Decode and dump the ATA error/status registers for the user so 907 * that they have some idea what really happened at the non 908 * make-believe layer. 909 * 910 * LOCKING: 911 * inherited from caller 912 */ 913 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 914 { 915 u8 stat = tf->command, err = tf->feature; 916 917 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); 918 if (stat & ATA_BUSY) { 919 printk("Busy }\n"); /* Data is not valid in this case */ 920 } else { 921 if (stat & ATA_DRDY) printk("DriveReady "); 922 if (stat & ATA_DF) printk("DeviceFault "); 923 if (stat & ATA_DSC) printk("SeekComplete "); 924 if (stat & ATA_DRQ) printk("DataRequest "); 925 if (stat & ATA_CORR) printk("CorrectedError "); 926 if (stat & ATA_SENSE) printk("Sense "); 927 if (stat & ATA_ERR) printk("Error "); 928 printk("}\n"); 929 930 if (err) { 931 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); 932 if (err & ATA_ABORTED) printk("DriveStatusError "); 933 if (err & ATA_ICRC) { 934 if (err & ATA_ABORTED) 935 printk("BadCRC "); 936 else printk("Sector "); 937 } 938 if (err & ATA_UNC) printk("UncorrectableError "); 939 if (err & ATA_IDNF) printk("SectorIdNotFound "); 940 if (err & ATA_TRK0NF) printk("TrackZeroNotFound "); 941 if (err & ATA_AMNF) printk("AddrMarkNotFound "); 942 printk("}\n"); 943 } 944 } 945 } 946 947 /** 948 * ata_to_sense_error - convert ATA error to SCSI error 949 * @id: ATA device number 950 * @drv_stat: value contained in ATA status register 951 * @drv_err: value contained in ATA error register 952 * @sk: the sense key we'll fill out 953 * @asc: the additional sense code we'll fill out 954 * @ascq: the additional sense code qualifier we'll fill out 955 * @verbose: be verbose 956 * 957 * Converts an ATA error into a SCSI error. Fill out pointers to 958 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 959 * format sense blocks. 960 * 961 * LOCKING: 962 * spin_lock_irqsave(host lock) 963 */ 964 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 965 u8 *asc, u8 *ascq, int verbose) 966 { 967 int i; 968 969 /* Based on the 3ware driver translation table */ 970 static const unsigned char sense_table[][4] = { 971 /* BBD|ECC|ID|MAR */ 972 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 973 // Device busy Aborted command 974 /* BBD|ECC|ID */ 975 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 976 // Device busy Aborted command 977 /* ECC|MC|MARK */ 978 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 979 // Device fault Hardware error 980 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 981 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 982 // Data CRC error SCSI parity error 983 /* MC|ID|ABRT|TRK0|MARK */ 984 {0x37, NOT_READY, 0x04, 0x00}, 985 // Unit offline Not ready 986 /* MCR|MARK */ 987 {0x09, NOT_READY, 0x04, 0x00}, 988 // Unrecovered disk error Not ready 989 /* Bad address mark */ 990 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 991 // Address mark not found for data field 992 /* TRK0 - Track 0 not found */ 993 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 994 // Hardware error 995 /* Abort: 0x04 is not translated here, see below */ 996 /* Media change request */ 997 {0x08, NOT_READY, 0x04, 0x00}, 998 // FIXME: faking offline 999 /* SRV/IDNF - ID not found */ 1000 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 1001 // Logical address out of range 1002 /* MC - Media Changed */ 1003 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 1004 // Not ready to ready change, medium may have changed 1005 /* ECC - Uncorrectable ECC error */ 1006 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 1007 // Unrecovered read error 1008 /* BBD - block marked bad */ 1009 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 1010 // Block marked bad Medium error, unrecovered read error 1011 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 1012 }; 1013 static const unsigned char stat_table[][4] = { 1014 /* Must be first because BUSY means no other bits valid */ 1015 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 1016 // Busy, fake parity for now 1017 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 1018 // Device ready, unaligned write command 1019 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 1020 // Device fault, internal target failure 1021 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 1022 // Timed out in xfer, fake parity for now 1023 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 1024 // Recovered ECC error Medium error, recovered 1025 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 1026 }; 1027 1028 /* 1029 * Is this an error we can process/parse 1030 */ 1031 if (drv_stat & ATA_BUSY) { 1032 drv_err = 0; /* Ignore the err bits, they're invalid */ 1033 } 1034 1035 if (drv_err) { 1036 /* Look for drv_err */ 1037 for (i = 0; sense_table[i][0] != 0xFF; i++) { 1038 /* Look for best matches first */ 1039 if ((sense_table[i][0] & drv_err) == 1040 sense_table[i][0]) { 1041 *sk = sense_table[i][1]; 1042 *asc = sense_table[i][2]; 1043 *ascq = sense_table[i][3]; 1044 goto translate_done; 1045 } 1046 } 1047 } 1048 1049 /* 1050 * Fall back to interpreting status bits. Note that if the drv_err 1051 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 1052 * is not descriptive enough. 1053 */ 1054 for (i = 0; stat_table[i][0] != 0xFF; i++) { 1055 if (stat_table[i][0] & drv_stat) { 1056 *sk = stat_table[i][1]; 1057 *asc = stat_table[i][2]; 1058 *ascq = stat_table[i][3]; 1059 goto translate_done; 1060 } 1061 } 1062 1063 /* 1064 * We need a sensible error return here, which is tricky, and one 1065 * that won't cause people to do things like return a disk wrongly. 1066 */ 1067 *sk = ABORTED_COMMAND; 1068 *asc = 0x00; 1069 *ascq = 0x00; 1070 1071 translate_done: 1072 if (verbose) 1073 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " 1074 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 1075 id, drv_stat, drv_err, *sk, *asc, *ascq); 1076 return; 1077 } 1078 1079 /* 1080 * ata_gen_passthru_sense - Generate check condition sense block. 1081 * @qc: Command that completed. 1082 * 1083 * This function is specific to the ATA descriptor format sense 1084 * block specified for the ATA pass through commands. Regardless 1085 * of whether the command errored or not, return a sense 1086 * block. Copy all controller registers into the sense 1087 * block. If there was no error, we get the request from an ATA 1088 * passthrough command, so we use the following sense data: 1089 * sk = RECOVERED ERROR 1090 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1091 * 1092 * 1093 * LOCKING: 1094 * None. 1095 */ 1096 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 1097 { 1098 struct scsi_cmnd *cmd = qc->scsicmd; 1099 struct ata_taskfile *tf = &qc->result_tf; 1100 unsigned char *sb = cmd->sense_buffer; 1101 unsigned char *desc = sb + 8; 1102 int verbose = qc->ap->ops->error_handler == NULL; 1103 u8 sense_key, asc, ascq; 1104 1105 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1106 1107 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1108 1109 /* 1110 * Use ata_to_sense_error() to map status register bits 1111 * onto sense key, asc & ascq. 1112 */ 1113 if (qc->err_mask || 1114 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1115 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1116 &sense_key, &asc, &ascq, verbose); 1117 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 1118 } else { 1119 /* 1120 * ATA PASS-THROUGH INFORMATION AVAILABLE 1121 * Always in descriptor format sense. 1122 */ 1123 scsi_build_sense_buffer(1, cmd->sense_buffer, 1124 RECOVERED_ERROR, 0, 0x1D); 1125 } 1126 1127 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 1128 u8 len; 1129 1130 /* descriptor format */ 1131 len = sb[7]; 1132 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 1133 if (!desc) { 1134 if (SCSI_SENSE_BUFFERSIZE < len + 14) 1135 return; 1136 sb[7] = len + 14; 1137 desc = sb + 8 + len; 1138 } 1139 desc[0] = 9; 1140 desc[1] = 12; 1141 /* 1142 * Copy registers into sense buffer. 1143 */ 1144 desc[2] = 0x00; 1145 desc[3] = tf->feature; /* == error reg */ 1146 desc[5] = tf->nsect; 1147 desc[7] = tf->lbal; 1148 desc[9] = tf->lbam; 1149 desc[11] = tf->lbah; 1150 desc[12] = tf->device; 1151 desc[13] = tf->command; /* == status reg */ 1152 1153 /* 1154 * Fill in Extend bit, and the high order bytes 1155 * if applicable. 1156 */ 1157 if (tf->flags & ATA_TFLAG_LBA48) { 1158 desc[2] |= 0x01; 1159 desc[4] = tf->hob_nsect; 1160 desc[6] = tf->hob_lbal; 1161 desc[8] = tf->hob_lbam; 1162 desc[10] = tf->hob_lbah; 1163 } 1164 } else { 1165 /* Fixed sense format */ 1166 desc[0] = tf->feature; 1167 desc[1] = tf->command; /* status */ 1168 desc[2] = tf->device; 1169 desc[3] = tf->nsect; 1170 desc[7] = 0; 1171 if (tf->flags & ATA_TFLAG_LBA48) { 1172 desc[8] |= 0x80; 1173 if (tf->hob_nsect) 1174 desc[8] |= 0x40; 1175 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 1176 desc[8] |= 0x20; 1177 } 1178 desc[9] = tf->lbal; 1179 desc[10] = tf->lbam; 1180 desc[11] = tf->lbah; 1181 } 1182 } 1183 1184 /** 1185 * ata_gen_ata_sense - generate a SCSI fixed sense block 1186 * @qc: Command that we are erroring out 1187 * 1188 * Generate sense block for a failed ATA command @qc. Descriptor 1189 * format is used to accommodate LBA48 block address. 1190 * 1191 * LOCKING: 1192 * None. 1193 */ 1194 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 1195 { 1196 struct ata_device *dev = qc->dev; 1197 struct scsi_cmnd *cmd = qc->scsicmd; 1198 struct ata_taskfile *tf = &qc->result_tf; 1199 unsigned char *sb = cmd->sense_buffer; 1200 int verbose = qc->ap->ops->error_handler == NULL; 1201 u64 block; 1202 u8 sense_key, asc, ascq; 1203 1204 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1205 1206 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1207 1208 if (ata_dev_disabled(dev)) { 1209 /* Device disabled after error recovery */ 1210 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 1211 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 1212 return; 1213 } 1214 /* Use ata_to_sense_error() to map status register bits 1215 * onto sense key, asc & ascq. 1216 */ 1217 if (qc->err_mask || 1218 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1219 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1220 &sense_key, &asc, &ascq, verbose); 1221 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1222 } else { 1223 /* Could not decode error */ 1224 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1225 tf->command, qc->err_mask); 1226 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1227 return; 1228 } 1229 1230 block = ata_tf_read_block(&qc->result_tf, dev); 1231 if (block == U64_MAX) 1232 return; 1233 1234 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1235 } 1236 1237 static void ata_scsi_sdev_config(struct scsi_device *sdev) 1238 { 1239 sdev->use_10_for_rw = 1; 1240 sdev->use_10_for_ms = 1; 1241 sdev->no_write_same = 1; 1242 1243 /* Schedule policy is determined by ->qc_defer() callback and 1244 * it needs to see every deferred qc. Set dev_blocked to 1 to 1245 * prevent SCSI midlayer from automatically deferring 1246 * requests. 1247 */ 1248 sdev->max_device_blocked = 1; 1249 } 1250 1251 /** 1252 * atapi_drain_needed - Check whether data transfer may overflow 1253 * @rq: request to be checked 1254 * 1255 * ATAPI commands which transfer variable length data to host 1256 * might overflow due to application error or hardware bug. This 1257 * function checks whether overflow should be drained and ignored 1258 * for @request. 1259 * 1260 * LOCKING: 1261 * None. 1262 * 1263 * RETURNS: 1264 * 1 if ; otherwise, 0. 1265 */ 1266 static int atapi_drain_needed(struct request *rq) 1267 { 1268 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC)) 1269 return 0; 1270 1271 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq))) 1272 return 0; 1273 1274 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; 1275 } 1276 1277 static int ata_scsi_dev_config(struct scsi_device *sdev, 1278 struct ata_device *dev) 1279 { 1280 struct request_queue *q = sdev->request_queue; 1281 1282 if (!ata_id_has_unload(dev->id)) 1283 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1284 1285 /* configure max sectors */ 1286 blk_queue_max_hw_sectors(q, dev->max_sectors); 1287 1288 if (dev->class == ATA_DEV_ATAPI) { 1289 void *buf; 1290 1291 sdev->sector_size = ATA_SECT_SIZE; 1292 1293 /* set DMA padding */ 1294 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1295 1296 /* configure draining */ 1297 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1298 if (!buf) { 1299 ata_dev_err(dev, "drain buffer allocation failed\n"); 1300 return -ENOMEM; 1301 } 1302 1303 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1304 } else { 1305 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1306 sdev->manage_start_stop = 1; 1307 } 1308 1309 /* 1310 * ata_pio_sectors() expects buffer for each sector to not cross 1311 * page boundary. Enforce it by requiring buffers to be sector 1312 * aligned, which works iff sector_size is not larger than 1313 * PAGE_SIZE. ATAPI devices also need the alignment as 1314 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1315 */ 1316 if (sdev->sector_size > PAGE_SIZE) 1317 ata_dev_warn(dev, 1318 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1319 sdev->sector_size); 1320 1321 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1322 1323 if (dev->flags & ATA_DFLAG_AN) 1324 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1325 1326 if (dev->flags & ATA_DFLAG_NCQ) { 1327 int depth; 1328 1329 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1330 depth = min(ATA_MAX_QUEUE - 1, depth); 1331 scsi_change_queue_depth(sdev, depth); 1332 } 1333 1334 blk_queue_flush_queueable(q, false); 1335 1336 dev->sdev = sdev; 1337 return 0; 1338 } 1339 1340 /** 1341 * ata_scsi_slave_config - Set SCSI device attributes 1342 * @sdev: SCSI device to examine 1343 * 1344 * This is called before we actually start reading 1345 * and writing to the device, to configure certain 1346 * SCSI mid-layer behaviors. 1347 * 1348 * LOCKING: 1349 * Defined by SCSI layer. We don't really care. 1350 */ 1351 1352 int ata_scsi_slave_config(struct scsi_device *sdev) 1353 { 1354 struct ata_port *ap = ata_shost_to_port(sdev->host); 1355 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1356 int rc = 0; 1357 1358 ata_scsi_sdev_config(sdev); 1359 1360 if (dev) 1361 rc = ata_scsi_dev_config(sdev, dev); 1362 1363 return rc; 1364 } 1365 1366 /** 1367 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1368 * @sdev: SCSI device to be destroyed 1369 * 1370 * @sdev is about to be destroyed for hot/warm unplugging. If 1371 * this unplugging was initiated by libata as indicated by NULL 1372 * dev->sdev, this function doesn't have to do anything. 1373 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1374 * Clear dev->sdev, schedule the device for ATA detach and invoke 1375 * EH. 1376 * 1377 * LOCKING: 1378 * Defined by SCSI layer. We don't really care. 1379 */ 1380 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1381 { 1382 struct ata_port *ap = ata_shost_to_port(sdev->host); 1383 struct request_queue *q = sdev->request_queue; 1384 unsigned long flags; 1385 struct ata_device *dev; 1386 1387 if (!ap->ops->error_handler) 1388 return; 1389 1390 spin_lock_irqsave(ap->lock, flags); 1391 dev = __ata_scsi_find_dev(ap, sdev); 1392 if (dev && dev->sdev) { 1393 /* SCSI device already in CANCEL state, no need to offline it */ 1394 dev->sdev = NULL; 1395 dev->flags |= ATA_DFLAG_DETACH; 1396 ata_port_schedule_eh(ap); 1397 } 1398 spin_unlock_irqrestore(ap->lock, flags); 1399 1400 kfree(q->dma_drain_buffer); 1401 q->dma_drain_buffer = NULL; 1402 q->dma_drain_size = 0; 1403 } 1404 1405 /** 1406 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth 1407 * @ap: ATA port to which the device change the queue depth 1408 * @sdev: SCSI device to configure queue depth for 1409 * @queue_depth: new queue depth 1410 * 1411 * libsas and libata have different approaches for associating a sdev to 1412 * its ata_port. 1413 * 1414 */ 1415 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1416 int queue_depth) 1417 { 1418 struct ata_device *dev; 1419 unsigned long flags; 1420 1421 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1422 return sdev->queue_depth; 1423 1424 dev = ata_scsi_find_dev(ap, sdev); 1425 if (!dev || !ata_dev_enabled(dev)) 1426 return sdev->queue_depth; 1427 1428 /* NCQ enabled? */ 1429 spin_lock_irqsave(ap->lock, flags); 1430 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1431 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1432 dev->flags |= ATA_DFLAG_NCQ_OFF; 1433 queue_depth = 1; 1434 } 1435 spin_unlock_irqrestore(ap->lock, flags); 1436 1437 /* limit and apply queue depth */ 1438 queue_depth = min(queue_depth, sdev->host->can_queue); 1439 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1440 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); 1441 1442 if (sdev->queue_depth == queue_depth) 1443 return -EINVAL; 1444 1445 return scsi_change_queue_depth(sdev, queue_depth); 1446 } 1447 1448 /** 1449 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1450 * @sdev: SCSI device to configure queue depth for 1451 * @queue_depth: new queue depth 1452 * 1453 * This is libata standard hostt->change_queue_depth callback. 1454 * SCSI will call into this callback when user tries to set queue 1455 * depth via sysfs. 1456 * 1457 * LOCKING: 1458 * SCSI layer (we don't care) 1459 * 1460 * RETURNS: 1461 * Newly configured queue depth. 1462 */ 1463 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) 1464 { 1465 struct ata_port *ap = ata_shost_to_port(sdev->host); 1466 1467 return __ata_change_queue_depth(ap, sdev, queue_depth); 1468 } 1469 1470 /** 1471 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1472 * @qc: Storage for translated ATA taskfile 1473 * 1474 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1475 * (to start). Perhaps these commands should be preceded by 1476 * CHECK POWER MODE to see what power mode the device is already in. 1477 * [See SAT revision 5 at www.t10.org] 1478 * 1479 * LOCKING: 1480 * spin_lock_irqsave(host lock) 1481 * 1482 * RETURNS: 1483 * Zero on success, non-zero on error. 1484 */ 1485 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1486 { 1487 struct scsi_cmnd *scmd = qc->scsicmd; 1488 struct ata_taskfile *tf = &qc->tf; 1489 const u8 *cdb = scmd->cmnd; 1490 u16 fp; 1491 u8 bp = 0xff; 1492 1493 if (scmd->cmd_len < 5) { 1494 fp = 4; 1495 goto invalid_fld; 1496 } 1497 1498 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1499 tf->protocol = ATA_PROT_NODATA; 1500 if (cdb[1] & 0x1) { 1501 ; /* ignore IMMED bit, violates sat-r05 */ 1502 } 1503 if (cdb[4] & 0x2) { 1504 fp = 4; 1505 bp = 1; 1506 goto invalid_fld; /* LOEJ bit set not supported */ 1507 } 1508 if (((cdb[4] >> 4) & 0xf) != 0) { 1509 fp = 4; 1510 bp = 3; 1511 goto invalid_fld; /* power conditions not supported */ 1512 } 1513 1514 if (cdb[4] & 0x1) { 1515 tf->nsect = 1; /* 1 sector, lba=0 */ 1516 1517 if (qc->dev->flags & ATA_DFLAG_LBA) { 1518 tf->flags |= ATA_TFLAG_LBA; 1519 1520 tf->lbah = 0x0; 1521 tf->lbam = 0x0; 1522 tf->lbal = 0x0; 1523 tf->device |= ATA_LBA; 1524 } else { 1525 /* CHS */ 1526 tf->lbal = 0x1; /* sect */ 1527 tf->lbam = 0x0; /* cyl low */ 1528 tf->lbah = 0x0; /* cyl high */ 1529 } 1530 1531 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1532 } else { 1533 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1534 * or S5) causing some drives to spin up and down again. 1535 */ 1536 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1537 system_state == SYSTEM_POWER_OFF) 1538 goto skip; 1539 1540 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1541 system_entering_hibernation()) 1542 goto skip; 1543 1544 /* Issue ATA STANDBY IMMEDIATE command */ 1545 tf->command = ATA_CMD_STANDBYNOW1; 1546 } 1547 1548 /* 1549 * Standby and Idle condition timers could be implemented but that 1550 * would require libata to implement the Power condition mode page 1551 * and allow the user to change it. Changing mode pages requires 1552 * MODE SELECT to be implemented. 1553 */ 1554 1555 return 0; 1556 1557 invalid_fld: 1558 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1559 return 1; 1560 skip: 1561 scmd->result = SAM_STAT_GOOD; 1562 return 1; 1563 } 1564 1565 1566 /** 1567 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1568 * @qc: Storage for translated ATA taskfile 1569 * 1570 * Sets up an ATA taskfile to issue FLUSH CACHE or 1571 * FLUSH CACHE EXT. 1572 * 1573 * LOCKING: 1574 * spin_lock_irqsave(host lock) 1575 * 1576 * RETURNS: 1577 * Zero on success, non-zero on error. 1578 */ 1579 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1580 { 1581 struct ata_taskfile *tf = &qc->tf; 1582 1583 tf->flags |= ATA_TFLAG_DEVICE; 1584 tf->protocol = ATA_PROT_NODATA; 1585 1586 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1587 tf->command = ATA_CMD_FLUSH_EXT; 1588 else 1589 tf->command = ATA_CMD_FLUSH; 1590 1591 /* flush is critical for IO integrity, consider it an IO command */ 1592 qc->flags |= ATA_QCFLAG_IO; 1593 1594 return 0; 1595 } 1596 1597 /** 1598 * scsi_6_lba_len - Get LBA and transfer length 1599 * @cdb: SCSI command to translate 1600 * 1601 * Calculate LBA and transfer length for 6-byte commands. 1602 * 1603 * RETURNS: 1604 * @plba: the LBA 1605 * @plen: the transfer length 1606 */ 1607 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1608 { 1609 u64 lba = 0; 1610 u32 len; 1611 1612 VPRINTK("six-byte command\n"); 1613 1614 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1615 lba |= ((u64)cdb[2]) << 8; 1616 lba |= ((u64)cdb[3]); 1617 1618 len = cdb[4]; 1619 1620 *plba = lba; 1621 *plen = len; 1622 } 1623 1624 /** 1625 * scsi_10_lba_len - Get LBA and transfer length 1626 * @cdb: SCSI command to translate 1627 * 1628 * Calculate LBA and transfer length for 10-byte commands. 1629 * 1630 * RETURNS: 1631 * @plba: the LBA 1632 * @plen: the transfer length 1633 */ 1634 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1635 { 1636 u64 lba = 0; 1637 u32 len = 0; 1638 1639 VPRINTK("ten-byte command\n"); 1640 1641 lba |= ((u64)cdb[2]) << 24; 1642 lba |= ((u64)cdb[3]) << 16; 1643 lba |= ((u64)cdb[4]) << 8; 1644 lba |= ((u64)cdb[5]); 1645 1646 len |= ((u32)cdb[7]) << 8; 1647 len |= ((u32)cdb[8]); 1648 1649 *plba = lba; 1650 *plen = len; 1651 } 1652 1653 /** 1654 * scsi_16_lba_len - Get LBA and transfer length 1655 * @cdb: SCSI command to translate 1656 * 1657 * Calculate LBA and transfer length for 16-byte commands. 1658 * 1659 * RETURNS: 1660 * @plba: the LBA 1661 * @plen: the transfer length 1662 */ 1663 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1664 { 1665 u64 lba = 0; 1666 u32 len = 0; 1667 1668 VPRINTK("sixteen-byte command\n"); 1669 1670 lba |= ((u64)cdb[2]) << 56; 1671 lba |= ((u64)cdb[3]) << 48; 1672 lba |= ((u64)cdb[4]) << 40; 1673 lba |= ((u64)cdb[5]) << 32; 1674 lba |= ((u64)cdb[6]) << 24; 1675 lba |= ((u64)cdb[7]) << 16; 1676 lba |= ((u64)cdb[8]) << 8; 1677 lba |= ((u64)cdb[9]); 1678 1679 len |= ((u32)cdb[10]) << 24; 1680 len |= ((u32)cdb[11]) << 16; 1681 len |= ((u32)cdb[12]) << 8; 1682 len |= ((u32)cdb[13]); 1683 1684 *plba = lba; 1685 *plen = len; 1686 } 1687 1688 /** 1689 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1690 * @qc: Storage for translated ATA taskfile 1691 * 1692 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1693 * 1694 * LOCKING: 1695 * spin_lock_irqsave(host lock) 1696 * 1697 * RETURNS: 1698 * Zero on success, non-zero on error. 1699 */ 1700 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1701 { 1702 struct scsi_cmnd *scmd = qc->scsicmd; 1703 struct ata_taskfile *tf = &qc->tf; 1704 struct ata_device *dev = qc->dev; 1705 u64 dev_sectors = qc->dev->n_sectors; 1706 const u8 *cdb = scmd->cmnd; 1707 u64 block; 1708 u32 n_block; 1709 u16 fp; 1710 1711 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1712 tf->protocol = ATA_PROT_NODATA; 1713 1714 if (cdb[0] == VERIFY) { 1715 if (scmd->cmd_len < 10) { 1716 fp = 9; 1717 goto invalid_fld; 1718 } 1719 scsi_10_lba_len(cdb, &block, &n_block); 1720 } else if (cdb[0] == VERIFY_16) { 1721 if (scmd->cmd_len < 16) { 1722 fp = 15; 1723 goto invalid_fld; 1724 } 1725 scsi_16_lba_len(cdb, &block, &n_block); 1726 } else { 1727 fp = 0; 1728 goto invalid_fld; 1729 } 1730 1731 if (!n_block) 1732 goto nothing_to_do; 1733 if (block >= dev_sectors) 1734 goto out_of_range; 1735 if ((block + n_block) > dev_sectors) 1736 goto out_of_range; 1737 1738 if (dev->flags & ATA_DFLAG_LBA) { 1739 tf->flags |= ATA_TFLAG_LBA; 1740 1741 if (lba_28_ok(block, n_block)) { 1742 /* use LBA28 */ 1743 tf->command = ATA_CMD_VERIFY; 1744 tf->device |= (block >> 24) & 0xf; 1745 } else if (lba_48_ok(block, n_block)) { 1746 if (!(dev->flags & ATA_DFLAG_LBA48)) 1747 goto out_of_range; 1748 1749 /* use LBA48 */ 1750 tf->flags |= ATA_TFLAG_LBA48; 1751 tf->command = ATA_CMD_VERIFY_EXT; 1752 1753 tf->hob_nsect = (n_block >> 8) & 0xff; 1754 1755 tf->hob_lbah = (block >> 40) & 0xff; 1756 tf->hob_lbam = (block >> 32) & 0xff; 1757 tf->hob_lbal = (block >> 24) & 0xff; 1758 } else 1759 /* request too large even for LBA48 */ 1760 goto out_of_range; 1761 1762 tf->nsect = n_block & 0xff; 1763 1764 tf->lbah = (block >> 16) & 0xff; 1765 tf->lbam = (block >> 8) & 0xff; 1766 tf->lbal = block & 0xff; 1767 1768 tf->device |= ATA_LBA; 1769 } else { 1770 /* CHS */ 1771 u32 sect, head, cyl, track; 1772 1773 if (!lba_28_ok(block, n_block)) 1774 goto out_of_range; 1775 1776 /* Convert LBA to CHS */ 1777 track = (u32)block / dev->sectors; 1778 cyl = track / dev->heads; 1779 head = track % dev->heads; 1780 sect = (u32)block % dev->sectors + 1; 1781 1782 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1783 (u32)block, track, cyl, head, sect); 1784 1785 /* Check whether the converted CHS can fit. 1786 Cylinder: 0-65535 1787 Head: 0-15 1788 Sector: 1-255*/ 1789 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1790 goto out_of_range; 1791 1792 tf->command = ATA_CMD_VERIFY; 1793 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1794 tf->lbal = sect; 1795 tf->lbam = cyl; 1796 tf->lbah = cyl >> 8; 1797 tf->device |= head; 1798 } 1799 1800 return 0; 1801 1802 invalid_fld: 1803 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1804 return 1; 1805 1806 out_of_range: 1807 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1808 /* "Logical Block Address out of range" */ 1809 return 1; 1810 1811 nothing_to_do: 1812 scmd->result = SAM_STAT_GOOD; 1813 return 1; 1814 } 1815 1816 /** 1817 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1818 * @qc: Storage for translated ATA taskfile 1819 * 1820 * Converts any of six SCSI read/write commands into the 1821 * ATA counterpart, including starting sector (LBA), 1822 * sector count, and taking into account the device's LBA48 1823 * support. 1824 * 1825 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1826 * %WRITE_16 are currently supported. 1827 * 1828 * LOCKING: 1829 * spin_lock_irqsave(host lock) 1830 * 1831 * RETURNS: 1832 * Zero on success, non-zero on error. 1833 */ 1834 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1835 { 1836 struct scsi_cmnd *scmd = qc->scsicmd; 1837 const u8 *cdb = scmd->cmnd; 1838 struct request *rq = scmd->request; 1839 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1840 unsigned int tf_flags = 0; 1841 u64 block; 1842 u32 n_block; 1843 int rc; 1844 u16 fp = 0; 1845 1846 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1847 tf_flags |= ATA_TFLAG_WRITE; 1848 1849 /* Calculate the SCSI LBA, transfer length and FUA. */ 1850 switch (cdb[0]) { 1851 case READ_10: 1852 case WRITE_10: 1853 if (unlikely(scmd->cmd_len < 10)) { 1854 fp = 9; 1855 goto invalid_fld; 1856 } 1857 scsi_10_lba_len(cdb, &block, &n_block); 1858 if (cdb[1] & (1 << 3)) 1859 tf_flags |= ATA_TFLAG_FUA; 1860 break; 1861 case READ_6: 1862 case WRITE_6: 1863 if (unlikely(scmd->cmd_len < 6)) { 1864 fp = 5; 1865 goto invalid_fld; 1866 } 1867 scsi_6_lba_len(cdb, &block, &n_block); 1868 1869 /* for 6-byte r/w commands, transfer length 0 1870 * means 256 blocks of data, not 0 block. 1871 */ 1872 if (!n_block) 1873 n_block = 256; 1874 break; 1875 case READ_16: 1876 case WRITE_16: 1877 if (unlikely(scmd->cmd_len < 16)) { 1878 fp = 15; 1879 goto invalid_fld; 1880 } 1881 scsi_16_lba_len(cdb, &block, &n_block); 1882 if (cdb[1] & (1 << 3)) 1883 tf_flags |= ATA_TFLAG_FUA; 1884 break; 1885 default: 1886 DPRINTK("no-byte command\n"); 1887 fp = 0; 1888 goto invalid_fld; 1889 } 1890 1891 /* Check and compose ATA command */ 1892 if (!n_block) 1893 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1894 * length 0 means transfer 0 block of data. 1895 * However, for ATA R/W commands, sector count 0 means 1896 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1897 * 1898 * WARNING: one or two older ATA drives treat 0 as 0... 1899 */ 1900 goto nothing_to_do; 1901 1902 qc->flags |= ATA_QCFLAG_IO; 1903 qc->nbytes = n_block * scmd->device->sector_size; 1904 1905 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1906 qc->tag, class); 1907 1908 if (likely(rc == 0)) 1909 return 0; 1910 1911 if (rc == -ERANGE) 1912 goto out_of_range; 1913 /* treat all other errors as -EINVAL, fall through */ 1914 invalid_fld: 1915 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1916 return 1; 1917 1918 out_of_range: 1919 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1920 /* "Logical Block Address out of range" */ 1921 return 1; 1922 1923 nothing_to_do: 1924 scmd->result = SAM_STAT_GOOD; 1925 return 1; 1926 } 1927 1928 static void ata_qc_done(struct ata_queued_cmd *qc) 1929 { 1930 struct scsi_cmnd *cmd = qc->scsicmd; 1931 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1932 1933 ata_qc_free(qc); 1934 done(cmd); 1935 } 1936 1937 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1938 { 1939 struct ata_port *ap = qc->ap; 1940 struct scsi_cmnd *cmd = qc->scsicmd; 1941 u8 *cdb = cmd->cmnd; 1942 int need_sense = (qc->err_mask != 0); 1943 1944 /* For ATA pass thru (SAT) commands, generate a sense block if 1945 * user mandated it or if there's an error. Note that if we 1946 * generate because the user forced us to [CK_COND =1], a check 1947 * condition is generated and the ATA register values are returned 1948 * whether the command completed successfully or not. If there 1949 * was no error, we use the following sense data: 1950 * sk = RECOVERED ERROR 1951 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1952 */ 1953 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1954 ((cdb[2] & 0x20) || need_sense)) 1955 ata_gen_passthru_sense(qc); 1956 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1957 cmd->result = SAM_STAT_CHECK_CONDITION; 1958 else if (need_sense) 1959 ata_gen_ata_sense(qc); 1960 else 1961 cmd->result = SAM_STAT_GOOD; 1962 1963 if (need_sense && !ap->ops->error_handler) 1964 ata_dump_status(ap->print_id, &qc->result_tf); 1965 1966 ata_qc_done(qc); 1967 } 1968 1969 /** 1970 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1971 * @dev: ATA device to which the command is addressed 1972 * @cmd: SCSI command to execute 1973 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1974 * 1975 * Our ->queuecommand() function has decided that the SCSI 1976 * command issued can be directly translated into an ATA 1977 * command, rather than handled internally. 1978 * 1979 * This function sets up an ata_queued_cmd structure for the 1980 * SCSI command, and sends that ata_queued_cmd to the hardware. 1981 * 1982 * The xlat_func argument (actor) returns 0 if ready to execute 1983 * ATA command, else 1 to finish translation. If 1 is returned 1984 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1985 * to be set reflecting an error condition or clean (early) 1986 * termination. 1987 * 1988 * LOCKING: 1989 * spin_lock_irqsave(host lock) 1990 * 1991 * RETURNS: 1992 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1993 * needs to be deferred. 1994 */ 1995 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1996 ata_xlat_func_t xlat_func) 1997 { 1998 struct ata_port *ap = dev->link->ap; 1999 struct ata_queued_cmd *qc; 2000 int rc; 2001 2002 VPRINTK("ENTER\n"); 2003 2004 qc = ata_scsi_qc_new(dev, cmd); 2005 if (!qc) 2006 goto err_mem; 2007 2008 /* data is present; dma-map it */ 2009 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 2010 cmd->sc_data_direction == DMA_TO_DEVICE) { 2011 if (unlikely(scsi_bufflen(cmd) < 1)) { 2012 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 2013 goto err_did; 2014 } 2015 2016 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 2017 2018 qc->dma_dir = cmd->sc_data_direction; 2019 } 2020 2021 qc->complete_fn = ata_scsi_qc_complete; 2022 2023 if (xlat_func(qc)) 2024 goto early_finish; 2025 2026 if (ap->ops->qc_defer) { 2027 if ((rc = ap->ops->qc_defer(qc))) 2028 goto defer; 2029 } 2030 2031 /* select device, send command to hardware */ 2032 ata_qc_issue(qc); 2033 2034 VPRINTK("EXIT\n"); 2035 return 0; 2036 2037 early_finish: 2038 ata_qc_free(qc); 2039 cmd->scsi_done(cmd); 2040 DPRINTK("EXIT - early finish (good or error)\n"); 2041 return 0; 2042 2043 err_did: 2044 ata_qc_free(qc); 2045 cmd->result = (DID_ERROR << 16); 2046 cmd->scsi_done(cmd); 2047 err_mem: 2048 DPRINTK("EXIT - internal\n"); 2049 return 0; 2050 2051 defer: 2052 ata_qc_free(qc); 2053 DPRINTK("EXIT - defer\n"); 2054 if (rc == ATA_DEFER_LINK) 2055 return SCSI_MLQUEUE_DEVICE_BUSY; 2056 else 2057 return SCSI_MLQUEUE_HOST_BUSY; 2058 } 2059 2060 /** 2061 * ata_scsi_rbuf_get - Map response buffer. 2062 * @cmd: SCSI command containing buffer to be mapped. 2063 * @flags: unsigned long variable to store irq enable status 2064 * @copy_in: copy in from user buffer 2065 * 2066 * Prepare buffer for simulated SCSI commands. 2067 * 2068 * LOCKING: 2069 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 2070 * 2071 * RETURNS: 2072 * Pointer to response buffer. 2073 */ 2074 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 2075 unsigned long *flags) 2076 { 2077 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 2078 2079 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 2080 if (copy_in) 2081 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2082 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2083 return ata_scsi_rbuf; 2084 } 2085 2086 /** 2087 * ata_scsi_rbuf_put - Unmap response buffer. 2088 * @cmd: SCSI command containing buffer to be unmapped. 2089 * @copy_out: copy out result 2090 * @flags: @flags passed to ata_scsi_rbuf_get() 2091 * 2092 * Returns rbuf buffer. The result is copied to @cmd's buffer if 2093 * @copy_back is true. 2094 * 2095 * LOCKING: 2096 * Unlocks ata_scsi_rbuf_lock. 2097 */ 2098 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 2099 unsigned long *flags) 2100 { 2101 if (copy_out) 2102 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2103 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2104 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 2105 } 2106 2107 /** 2108 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 2109 * @args: device IDENTIFY data / SCSI command of interest. 2110 * @actor: Callback hook for desired SCSI command simulator 2111 * 2112 * Takes care of the hard work of simulating a SCSI command... 2113 * Mapping the response buffer, calling the command's handler, 2114 * and handling the handler's return value. This return value 2115 * indicates whether the handler wishes the SCSI command to be 2116 * completed successfully (0), or not (in which case cmd->result 2117 * and sense buffer are assumed to be set). 2118 * 2119 * LOCKING: 2120 * spin_lock_irqsave(host lock) 2121 */ 2122 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 2123 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 2124 { 2125 u8 *rbuf; 2126 unsigned int rc; 2127 struct scsi_cmnd *cmd = args->cmd; 2128 unsigned long flags; 2129 2130 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 2131 rc = actor(args, rbuf); 2132 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 2133 2134 if (rc == 0) 2135 cmd->result = SAM_STAT_GOOD; 2136 args->done(cmd); 2137 } 2138 2139 /** 2140 * ata_scsiop_inq_std - Simulate INQUIRY command 2141 * @args: device IDENTIFY data / SCSI command of interest. 2142 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2143 * 2144 * Returns standard device identification data associated 2145 * with non-VPD INQUIRY command output. 2146 * 2147 * LOCKING: 2148 * spin_lock_irqsave(host lock) 2149 */ 2150 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 2151 { 2152 const u8 versions[] = { 2153 0x00, 2154 0x60, /* SAM-3 (no version claimed) */ 2155 2156 0x03, 2157 0x20, /* SBC-2 (no version claimed) */ 2158 2159 0x03, 2160 0x00 /* SPC-3 (no version claimed) */ 2161 }; 2162 const u8 versions_zbc[] = { 2163 0x00, 2164 0xA0, /* SAM-5 (no version claimed) */ 2165 2166 0x06, 2167 0x00, /* SBC-4 (no version claimed) */ 2168 2169 0x05, 2170 0xC0, /* SPC-5 (no version claimed) */ 2171 2172 0x60, 2173 0x24, /* ZBC r05 */ 2174 }; 2175 2176 u8 hdr[] = { 2177 TYPE_DISK, 2178 0, 2179 0x5, /* claim SPC-3 version compatibility */ 2180 2, 2181 95 - 4, 2182 0, 2183 0, 2184 2 2185 }; 2186 2187 VPRINTK("ENTER\n"); 2188 2189 /* set scsi removable (RMB) bit per ata bit, or if the 2190 * AHCI port says it's external (Hotplug-capable, eSATA). 2191 */ 2192 if (ata_id_removable(args->id) || 2193 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 2194 hdr[1] |= (1 << 7); 2195 2196 if (args->dev->class == ATA_DEV_ZAC) { 2197 hdr[0] = TYPE_ZBC; 2198 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 2199 } 2200 2201 memcpy(rbuf, hdr, sizeof(hdr)); 2202 memcpy(&rbuf[8], "ATA ", 8); 2203 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 2204 2205 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2206 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2207 if (strncmp(&rbuf[32], " ", 4) == 0) 2208 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2209 2210 if (rbuf[32] == 0 || rbuf[32] == ' ') 2211 memcpy(&rbuf[32], "n/a ", 4); 2212 2213 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 2214 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2215 else 2216 memcpy(rbuf + 58, versions, sizeof(versions)); 2217 2218 return 0; 2219 } 2220 2221 /** 2222 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2223 * @args: device IDENTIFY data / SCSI command of interest. 2224 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2225 * 2226 * Returns list of inquiry VPD pages available. 2227 * 2228 * LOCKING: 2229 * spin_lock_irqsave(host lock) 2230 */ 2231 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 2232 { 2233 int num_pages; 2234 const u8 pages[] = { 2235 0x00, /* page 0x00, this page */ 2236 0x80, /* page 0x80, unit serial no page */ 2237 0x83, /* page 0x83, device ident page */ 2238 0x89, /* page 0x89, ata info page */ 2239 0xb0, /* page 0xb0, block limits page */ 2240 0xb1, /* page 0xb1, block device characteristics page */ 2241 0xb2, /* page 0xb2, thin provisioning page */ 2242 0xb6, /* page 0xb6, zoned block device characteristics */ 2243 }; 2244 2245 num_pages = sizeof(pages); 2246 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 2247 num_pages--; 2248 rbuf[3] = num_pages; /* number of supported VPD pages */ 2249 memcpy(rbuf + 4, pages, num_pages); 2250 return 0; 2251 } 2252 2253 /** 2254 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2255 * @args: device IDENTIFY data / SCSI command of interest. 2256 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2257 * 2258 * Returns ATA device serial number. 2259 * 2260 * LOCKING: 2261 * spin_lock_irqsave(host lock) 2262 */ 2263 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2264 { 2265 const u8 hdr[] = { 2266 0, 2267 0x80, /* this page code */ 2268 0, 2269 ATA_ID_SERNO_LEN, /* page len */ 2270 }; 2271 2272 memcpy(rbuf, hdr, sizeof(hdr)); 2273 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2274 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2275 return 0; 2276 } 2277 2278 /** 2279 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2280 * @args: device IDENTIFY data / SCSI command of interest. 2281 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2282 * 2283 * Yields two logical unit device identification designators: 2284 * - vendor specific ASCII containing the ATA serial number 2285 * - SAT defined "t10 vendor id based" containing ASCII vendor 2286 * name ("ATA "), model and serial numbers. 2287 * 2288 * LOCKING: 2289 * spin_lock_irqsave(host lock) 2290 */ 2291 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2292 { 2293 const int sat_model_serial_desc_len = 68; 2294 int num; 2295 2296 rbuf[1] = 0x83; /* this page code */ 2297 num = 4; 2298 2299 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2300 rbuf[num + 0] = 2; 2301 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2302 num += 4; 2303 ata_id_string(args->id, (unsigned char *) rbuf + num, 2304 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2305 num += ATA_ID_SERNO_LEN; 2306 2307 /* SAT defined lu model and serial numbers descriptor */ 2308 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2309 rbuf[num + 0] = 2; 2310 rbuf[num + 1] = 1; 2311 rbuf[num + 3] = sat_model_serial_desc_len; 2312 num += 4; 2313 memcpy(rbuf + num, "ATA ", 8); 2314 num += 8; 2315 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2316 ATA_ID_PROD_LEN); 2317 num += ATA_ID_PROD_LEN; 2318 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2319 ATA_ID_SERNO_LEN); 2320 num += ATA_ID_SERNO_LEN; 2321 2322 if (ata_id_has_wwn(args->id)) { 2323 /* SAT defined lu world wide name */ 2324 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2325 rbuf[num + 0] = 1; 2326 rbuf[num + 1] = 3; 2327 rbuf[num + 3] = ATA_ID_WWN_LEN; 2328 num += 4; 2329 ata_id_string(args->id, (unsigned char *) rbuf + num, 2330 ATA_ID_WWN, ATA_ID_WWN_LEN); 2331 num += ATA_ID_WWN_LEN; 2332 } 2333 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2334 return 0; 2335 } 2336 2337 /** 2338 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2339 * @args: device IDENTIFY data / SCSI command of interest. 2340 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2341 * 2342 * Yields SAT-specified ATA VPD page. 2343 * 2344 * LOCKING: 2345 * spin_lock_irqsave(host lock) 2346 */ 2347 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2348 { 2349 struct ata_taskfile tf; 2350 2351 memset(&tf, 0, sizeof(tf)); 2352 2353 rbuf[1] = 0x89; /* our page code */ 2354 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2355 rbuf[3] = (0x238 & 0xff); 2356 2357 memcpy(&rbuf[8], "linux ", 8); 2358 memcpy(&rbuf[16], "libata ", 16); 2359 memcpy(&rbuf[32], DRV_VERSION, 4); 2360 2361 /* we don't store the ATA device signature, so we fake it */ 2362 2363 tf.command = ATA_DRDY; /* really, this is Status reg */ 2364 tf.lbal = 0x1; 2365 tf.nsect = 0x1; 2366 2367 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2368 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2369 2370 rbuf[56] = ATA_CMD_ID_ATA; 2371 2372 memcpy(&rbuf[60], &args->id[0], 512); 2373 return 0; 2374 } 2375 2376 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2377 { 2378 u16 min_io_sectors; 2379 2380 rbuf[1] = 0xb0; 2381 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2382 2383 /* 2384 * Optimal transfer length granularity. 2385 * 2386 * This is always one physical block, but for disks with a smaller 2387 * logical than physical sector size we need to figure out what the 2388 * latter is. 2389 */ 2390 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2391 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2392 2393 /* 2394 * Optimal unmap granularity. 2395 * 2396 * The ATA spec doesn't even know about a granularity or alignment 2397 * for the TRIM command. We can leave away most of the unmap related 2398 * VPD page entries, but we have specifify a granularity to signal 2399 * that we support some form of unmap - in thise case via WRITE SAME 2400 * with the unmap bit set. 2401 */ 2402 if (ata_id_has_trim(args->id)) { 2403 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); 2404 put_unaligned_be32(1, &rbuf[28]); 2405 } 2406 2407 return 0; 2408 } 2409 2410 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2411 { 2412 int form_factor = ata_id_form_factor(args->id); 2413 int media_rotation_rate = ata_id_rotation_rate(args->id); 2414 u8 zoned = ata_id_zoned_cap(args->id); 2415 2416 rbuf[1] = 0xb1; 2417 rbuf[3] = 0x3c; 2418 rbuf[4] = media_rotation_rate >> 8; 2419 rbuf[5] = media_rotation_rate; 2420 rbuf[7] = form_factor; 2421 if (zoned) 2422 rbuf[8] = (zoned << 4); 2423 2424 return 0; 2425 } 2426 2427 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2428 { 2429 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2430 rbuf[1] = 0xb2; 2431 rbuf[3] = 0x4; 2432 rbuf[5] = 1 << 6; /* TPWS */ 2433 2434 return 0; 2435 } 2436 2437 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2438 { 2439 /* 2440 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2441 */ 2442 rbuf[1] = 0xb6; 2443 rbuf[3] = 0x3C; 2444 2445 /* 2446 * URSWRZ bit is only meaningful for host-managed ZAC drives 2447 */ 2448 if (args->dev->zac_zoned_cap & 1) 2449 rbuf[4] |= 1; 2450 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2451 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2452 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2453 2454 return 0; 2455 } 2456 2457 /** 2458 * ata_scsiop_noop - Command handler that simply returns success. 2459 * @args: device IDENTIFY data / SCSI command of interest. 2460 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2461 * 2462 * No operation. Simply returns success to caller, to indicate 2463 * that the caller should successfully complete this SCSI command. 2464 * 2465 * LOCKING: 2466 * spin_lock_irqsave(host lock) 2467 */ 2468 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) 2469 { 2470 VPRINTK("ENTER\n"); 2471 return 0; 2472 } 2473 2474 /** 2475 * modecpy - Prepare response for MODE SENSE 2476 * @dest: output buffer 2477 * @src: data being copied 2478 * @n: length of mode page 2479 * @changeable: whether changeable parameters are requested 2480 * 2481 * Generate a generic MODE SENSE page for either current or changeable 2482 * parameters. 2483 * 2484 * LOCKING: 2485 * None. 2486 */ 2487 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2488 { 2489 if (changeable) { 2490 memcpy(dest, src, 2); 2491 memset(dest + 2, 0, n - 2); 2492 } else { 2493 memcpy(dest, src, n); 2494 } 2495 } 2496 2497 /** 2498 * ata_msense_caching - Simulate MODE SENSE caching info page 2499 * @id: device IDENTIFY data 2500 * @buf: output buffer 2501 * @changeable: whether changeable parameters are requested 2502 * 2503 * Generate a caching info page, which conditionally indicates 2504 * write caching to the SCSI layer, depending on device 2505 * capabilities. 2506 * 2507 * LOCKING: 2508 * None. 2509 */ 2510 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2511 { 2512 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2513 if (changeable) { 2514 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2515 } else { 2516 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2517 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2518 } 2519 return sizeof(def_cache_mpage); 2520 } 2521 2522 /** 2523 * ata_msense_control - Simulate MODE SENSE control mode page 2524 * @dev: ATA device of interest 2525 * @buf: output buffer 2526 * @changeable: whether changeable parameters are requested 2527 * 2528 * Generate a generic MODE SENSE control mode page. 2529 * 2530 * LOCKING: 2531 * None. 2532 */ 2533 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2534 bool changeable) 2535 { 2536 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2537 if (changeable) { 2538 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2539 } else { 2540 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2541 2542 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2543 } 2544 return sizeof(def_control_mpage); 2545 } 2546 2547 /** 2548 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2549 * @buf: output buffer 2550 * @changeable: whether changeable parameters are requested 2551 * 2552 * Generate a generic MODE SENSE r/w error recovery page. 2553 * 2554 * LOCKING: 2555 * None. 2556 */ 2557 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2558 { 2559 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2560 changeable); 2561 return sizeof(def_rw_recovery_mpage); 2562 } 2563 2564 /* 2565 * We can turn this into a real blacklist if it's needed, for now just 2566 * blacklist any Maxtor BANC1G10 revision firmware 2567 */ 2568 static int ata_dev_supports_fua(u16 *id) 2569 { 2570 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2571 2572 if (!libata_fua) 2573 return 0; 2574 if (!ata_id_has_fua(id)) 2575 return 0; 2576 2577 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2578 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2579 2580 if (strcmp(model, "Maxtor")) 2581 return 1; 2582 if (strcmp(fw, "BANC1G10")) 2583 return 1; 2584 2585 return 0; /* blacklisted */ 2586 } 2587 2588 /** 2589 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2590 * @args: device IDENTIFY data / SCSI command of interest. 2591 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2592 * 2593 * Simulate MODE SENSE commands. Assume this is invoked for direct 2594 * access devices (e.g. disks) only. There should be no block 2595 * descriptor for other device types. 2596 * 2597 * LOCKING: 2598 * spin_lock_irqsave(host lock) 2599 */ 2600 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2601 { 2602 struct ata_device *dev = args->dev; 2603 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2604 const u8 sat_blk_desc[] = { 2605 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2606 0, 2607 0, 0x2, 0x0 /* block length: 512 bytes */ 2608 }; 2609 u8 pg, spg; 2610 unsigned int ebd, page_control, six_byte; 2611 u8 dpofua, bp = 0xff; 2612 u16 fp; 2613 2614 VPRINTK("ENTER\n"); 2615 2616 six_byte = (scsicmd[0] == MODE_SENSE); 2617 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2618 /* 2619 * LLBA bit in msense(10) ignored (compliant) 2620 */ 2621 2622 page_control = scsicmd[2] >> 6; 2623 switch (page_control) { 2624 case 0: /* current */ 2625 case 1: /* changeable */ 2626 case 2: /* defaults */ 2627 break; /* supported */ 2628 case 3: /* saved */ 2629 goto saving_not_supp; 2630 default: 2631 fp = 2; 2632 bp = 6; 2633 goto invalid_fld; 2634 } 2635 2636 if (six_byte) 2637 p += 4 + (ebd ? 8 : 0); 2638 else 2639 p += 8 + (ebd ? 8 : 0); 2640 2641 pg = scsicmd[2] & 0x3f; 2642 spg = scsicmd[3]; 2643 /* 2644 * No mode subpages supported (yet) but asking for _all_ 2645 * subpages may be valid 2646 */ 2647 if (spg && (spg != ALL_SUB_MPAGES)) { 2648 fp = 3; 2649 goto invalid_fld; 2650 } 2651 2652 switch(pg) { 2653 case RW_RECOVERY_MPAGE: 2654 p += ata_msense_rw_recovery(p, page_control == 1); 2655 break; 2656 2657 case CACHE_MPAGE: 2658 p += ata_msense_caching(args->id, p, page_control == 1); 2659 break; 2660 2661 case CONTROL_MPAGE: 2662 p += ata_msense_control(args->dev, p, page_control == 1); 2663 break; 2664 2665 case ALL_MPAGES: 2666 p += ata_msense_rw_recovery(p, page_control == 1); 2667 p += ata_msense_caching(args->id, p, page_control == 1); 2668 p += ata_msense_control(args->dev, p, page_control == 1); 2669 break; 2670 2671 default: /* invalid page code */ 2672 fp = 2; 2673 goto invalid_fld; 2674 } 2675 2676 dpofua = 0; 2677 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2678 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2679 dpofua = 1 << 4; 2680 2681 if (six_byte) { 2682 rbuf[0] = p - rbuf - 1; 2683 rbuf[2] |= dpofua; 2684 if (ebd) { 2685 rbuf[3] = sizeof(sat_blk_desc); 2686 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2687 } 2688 } else { 2689 unsigned int output_len = p - rbuf - 2; 2690 2691 rbuf[0] = output_len >> 8; 2692 rbuf[1] = output_len; 2693 rbuf[3] |= dpofua; 2694 if (ebd) { 2695 rbuf[7] = sizeof(sat_blk_desc); 2696 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2697 } 2698 } 2699 return 0; 2700 2701 invalid_fld: 2702 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2703 return 1; 2704 2705 saving_not_supp: 2706 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2707 /* "Saving parameters not supported" */ 2708 return 1; 2709 } 2710 2711 /** 2712 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2713 * @args: device IDENTIFY data / SCSI command of interest. 2714 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2715 * 2716 * Simulate READ CAPACITY commands. 2717 * 2718 * LOCKING: 2719 * None. 2720 */ 2721 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2722 { 2723 struct ata_device *dev = args->dev; 2724 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2725 u32 sector_size; /* physical sector size in bytes */ 2726 u8 log2_per_phys; 2727 u16 lowest_aligned; 2728 2729 sector_size = ata_id_logical_sector_size(dev->id); 2730 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2731 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2732 2733 VPRINTK("ENTER\n"); 2734 2735 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2736 if (last_lba >= 0xffffffffULL) 2737 last_lba = 0xffffffff; 2738 2739 /* sector count, 32-bit */ 2740 rbuf[0] = last_lba >> (8 * 3); 2741 rbuf[1] = last_lba >> (8 * 2); 2742 rbuf[2] = last_lba >> (8 * 1); 2743 rbuf[3] = last_lba; 2744 2745 /* sector size */ 2746 rbuf[4] = sector_size >> (8 * 3); 2747 rbuf[5] = sector_size >> (8 * 2); 2748 rbuf[6] = sector_size >> (8 * 1); 2749 rbuf[7] = sector_size; 2750 } else { 2751 /* sector count, 64-bit */ 2752 rbuf[0] = last_lba >> (8 * 7); 2753 rbuf[1] = last_lba >> (8 * 6); 2754 rbuf[2] = last_lba >> (8 * 5); 2755 rbuf[3] = last_lba >> (8 * 4); 2756 rbuf[4] = last_lba >> (8 * 3); 2757 rbuf[5] = last_lba >> (8 * 2); 2758 rbuf[6] = last_lba >> (8 * 1); 2759 rbuf[7] = last_lba; 2760 2761 /* sector size */ 2762 rbuf[ 8] = sector_size >> (8 * 3); 2763 rbuf[ 9] = sector_size >> (8 * 2); 2764 rbuf[10] = sector_size >> (8 * 1); 2765 rbuf[11] = sector_size; 2766 2767 rbuf[12] = 0; 2768 rbuf[13] = log2_per_phys; 2769 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2770 rbuf[15] = lowest_aligned; 2771 2772 if (ata_id_has_trim(args->id) && 2773 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2774 rbuf[14] |= 0x80; /* LBPME */ 2775 2776 if (ata_id_has_zero_after_trim(args->id) && 2777 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2778 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2779 rbuf[14] |= 0x40; /* LBPRZ */ 2780 } 2781 } 2782 if (ata_id_zoned_cap(args->id) || 2783 args->dev->class == ATA_DEV_ZAC) 2784 rbuf[12] = (1 << 4); /* RC_BASIS */ 2785 } 2786 return 0; 2787 } 2788 2789 /** 2790 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2791 * @args: device IDENTIFY data / SCSI command of interest. 2792 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2793 * 2794 * Simulate REPORT LUNS command. 2795 * 2796 * LOCKING: 2797 * spin_lock_irqsave(host lock) 2798 */ 2799 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2800 { 2801 VPRINTK("ENTER\n"); 2802 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2803 2804 return 0; 2805 } 2806 2807 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2808 { 2809 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2810 /* FIXME: not quite right; we don't want the 2811 * translation of taskfile registers into 2812 * a sense descriptors, since that's only 2813 * correct for ATA, not ATAPI 2814 */ 2815 ata_gen_passthru_sense(qc); 2816 } 2817 2818 ata_qc_done(qc); 2819 } 2820 2821 /* is it pointless to prefer PIO for "safety reasons"? */ 2822 static inline int ata_pio_use_silly(struct ata_port *ap) 2823 { 2824 return (ap->flags & ATA_FLAG_PIO_DMA); 2825 } 2826 2827 static void atapi_request_sense(struct ata_queued_cmd *qc) 2828 { 2829 struct ata_port *ap = qc->ap; 2830 struct scsi_cmnd *cmd = qc->scsicmd; 2831 2832 DPRINTK("ATAPI request sense\n"); 2833 2834 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2835 2836 #ifdef CONFIG_ATA_SFF 2837 if (ap->ops->sff_tf_read) 2838 ap->ops->sff_tf_read(ap, &qc->tf); 2839 #endif 2840 2841 /* fill these in, for the case where they are -not- overwritten */ 2842 cmd->sense_buffer[0] = 0x70; 2843 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2844 2845 ata_qc_reinit(qc); 2846 2847 /* setup sg table and init transfer direction */ 2848 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2849 ata_sg_init(qc, &qc->sgent, 1); 2850 qc->dma_dir = DMA_FROM_DEVICE; 2851 2852 memset(&qc->cdb, 0, qc->dev->cdb_len); 2853 qc->cdb[0] = REQUEST_SENSE; 2854 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2855 2856 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2857 qc->tf.command = ATA_CMD_PACKET; 2858 2859 if (ata_pio_use_silly(ap)) { 2860 qc->tf.protocol = ATAPI_PROT_DMA; 2861 qc->tf.feature |= ATAPI_PKT_DMA; 2862 } else { 2863 qc->tf.protocol = ATAPI_PROT_PIO; 2864 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2865 qc->tf.lbah = 0; 2866 } 2867 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2868 2869 qc->complete_fn = atapi_sense_complete; 2870 2871 ata_qc_issue(qc); 2872 2873 DPRINTK("EXIT\n"); 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 u8 *scsicmd = cmd->cmnd; 2931 2932 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { 2933 unsigned long flags; 2934 u8 *buf; 2935 2936 buf = ata_scsi_rbuf_get(cmd, true, &flags); 2937 2938 /* ATAPI devices typically report zero for their SCSI version, 2939 * and sometimes deviate from the spec WRT response data 2940 * format. If SCSI version is reported as zero like normal, 2941 * then we make the following fixups: 1) Fake MMC-5 version, 2942 * to indicate to the Linux scsi midlayer this is a modern 2943 * device. 2) Ensure response data format / ATAPI information 2944 * are always correct. 2945 */ 2946 if (buf[2] == 0) { 2947 buf[2] = 0x5; 2948 buf[3] = 0x32; 2949 } 2950 2951 ata_scsi_rbuf_put(cmd, true, &flags); 2952 } 2953 2954 cmd->result = SAM_STAT_GOOD; 2955 } 2956 2957 ata_qc_done(qc); 2958 } 2959 /** 2960 * atapi_xlat - Initialize PACKET taskfile 2961 * @qc: command structure to be initialized 2962 * 2963 * LOCKING: 2964 * spin_lock_irqsave(host lock) 2965 * 2966 * RETURNS: 2967 * Zero on success, non-zero on failure. 2968 */ 2969 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2970 { 2971 struct scsi_cmnd *scmd = qc->scsicmd; 2972 struct ata_device *dev = qc->dev; 2973 int nodata = (scmd->sc_data_direction == DMA_NONE); 2974 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2975 unsigned int nbytes; 2976 2977 memset(qc->cdb, 0, dev->cdb_len); 2978 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2979 2980 qc->complete_fn = atapi_qc_complete; 2981 2982 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2983 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2984 qc->tf.flags |= ATA_TFLAG_WRITE; 2985 DPRINTK("direction: write\n"); 2986 } 2987 2988 qc->tf.command = ATA_CMD_PACKET; 2989 ata_qc_set_pc_nbytes(qc); 2990 2991 /* check whether ATAPI DMA is safe */ 2992 if (!nodata && !using_pio && atapi_check_dma(qc)) 2993 using_pio = 1; 2994 2995 /* Some controller variants snoop this value for Packet 2996 * transfers to do state machine and FIFO management. Thus we 2997 * want to set it properly, and for DMA where it is 2998 * effectively meaningless. 2999 */ 3000 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 3001 3002 /* Most ATAPI devices which honor transfer chunk size don't 3003 * behave according to the spec when odd chunk size which 3004 * matches the transfer length is specified. If the number of 3005 * bytes to transfer is 2n+1. According to the spec, what 3006 * should happen is to indicate that 2n+1 is going to be 3007 * transferred and transfer 2n+2 bytes where the last byte is 3008 * padding. 3009 * 3010 * In practice, this doesn't happen. ATAPI devices first 3011 * indicate and transfer 2n bytes and then indicate and 3012 * transfer 2 bytes where the last byte is padding. 3013 * 3014 * This inconsistency confuses several controllers which 3015 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 3016 * These controllers use actual number of transferred bytes to 3017 * update DMA poitner and transfer of 4n+2 bytes make those 3018 * controller push DMA pointer by 4n+4 bytes because SATA data 3019 * FISes are aligned to 4 bytes. This causes data corruption 3020 * and buffer overrun. 3021 * 3022 * Always setting nbytes to even number solves this problem 3023 * because then ATAPI devices don't have to split data at 2n 3024 * boundaries. 3025 */ 3026 if (nbytes & 0x1) 3027 nbytes++; 3028 3029 qc->tf.lbam = (nbytes & 0xFF); 3030 qc->tf.lbah = (nbytes >> 8); 3031 3032 if (nodata) 3033 qc->tf.protocol = ATAPI_PROT_NODATA; 3034 else if (using_pio) 3035 qc->tf.protocol = ATAPI_PROT_PIO; 3036 else { 3037 /* DMA data xfer */ 3038 qc->tf.protocol = ATAPI_PROT_DMA; 3039 qc->tf.feature |= ATAPI_PKT_DMA; 3040 3041 if ((dev->flags & ATA_DFLAG_DMADIR) && 3042 (scmd->sc_data_direction != DMA_TO_DEVICE)) 3043 /* some SATA bridges need us to indicate data xfer direction */ 3044 qc->tf.feature |= ATAPI_DMADIR; 3045 } 3046 3047 3048 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 3049 as ATAPI tape drives don't get this right otherwise */ 3050 return 0; 3051 } 3052 3053 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 3054 { 3055 if (!sata_pmp_attached(ap)) { 3056 if (likely(devno < ata_link_max_devices(&ap->link))) 3057 return &ap->link.device[devno]; 3058 } else { 3059 if (likely(devno < ap->nr_pmp_links)) 3060 return &ap->pmp_link[devno].device[0]; 3061 } 3062 3063 return NULL; 3064 } 3065 3066 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 3067 const struct scsi_device *scsidev) 3068 { 3069 int devno; 3070 3071 /* skip commands not addressed to targets we simulate */ 3072 if (!sata_pmp_attached(ap)) { 3073 if (unlikely(scsidev->channel || scsidev->lun)) 3074 return NULL; 3075 devno = scsidev->id; 3076 } else { 3077 if (unlikely(scsidev->id || scsidev->lun)) 3078 return NULL; 3079 devno = scsidev->channel; 3080 } 3081 3082 return ata_find_dev(ap, devno); 3083 } 3084 3085 /** 3086 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3087 * @ap: ATA port to which the device is attached 3088 * @scsidev: SCSI device from which we derive the ATA device 3089 * 3090 * Given various information provided in struct scsi_cmnd, 3091 * map that onto an ATA bus, and using that mapping 3092 * determine which ata_device is associated with the 3093 * SCSI command to be sent. 3094 * 3095 * LOCKING: 3096 * spin_lock_irqsave(host lock) 3097 * 3098 * RETURNS: 3099 * Associated ATA device, or %NULL if not found. 3100 */ 3101 static struct ata_device * 3102 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3103 { 3104 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3105 3106 if (unlikely(!dev || !ata_dev_enabled(dev))) 3107 return NULL; 3108 3109 return dev; 3110 } 3111 3112 /* 3113 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3114 * @byte1: Byte 1 from pass-thru CDB. 3115 * 3116 * RETURNS: 3117 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3118 */ 3119 static u8 3120 ata_scsi_map_proto(u8 byte1) 3121 { 3122 switch((byte1 & 0x1e) >> 1) { 3123 case 3: /* Non-data */ 3124 return ATA_PROT_NODATA; 3125 3126 case 6: /* DMA */ 3127 case 10: /* UDMA Data-in */ 3128 case 11: /* UDMA Data-Out */ 3129 return ATA_PROT_DMA; 3130 3131 case 4: /* PIO Data-in */ 3132 case 5: /* PIO Data-out */ 3133 return ATA_PROT_PIO; 3134 3135 case 12: /* FPDMA */ 3136 return ATA_PROT_NCQ; 3137 3138 case 0: /* Hard Reset */ 3139 case 1: /* SRST */ 3140 case 8: /* Device Diagnostic */ 3141 case 9: /* Device Reset */ 3142 case 7: /* DMA Queued */ 3143 case 15: /* Return Response Info */ 3144 default: /* Reserved */ 3145 break; 3146 } 3147 3148 return ATA_PROT_UNKNOWN; 3149 } 3150 3151 /** 3152 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3153 * @qc: command structure to be initialized 3154 * 3155 * Handles either 12 or 16-byte versions of the CDB. 3156 * 3157 * RETURNS: 3158 * Zero on success, non-zero on failure. 3159 */ 3160 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3161 { 3162 struct ata_taskfile *tf = &(qc->tf); 3163 struct scsi_cmnd *scmd = qc->scsicmd; 3164 struct ata_device *dev = qc->dev; 3165 const u8 *cdb = scmd->cmnd; 3166 u16 fp; 3167 3168 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) { 3169 fp = 1; 3170 goto invalid_fld; 3171 } 3172 3173 if (ata_is_ncq(tf->protocol) && (cdb[2] & 0x3) == 0) 3174 tf->protocol = ATA_PROT_NCQ_NODATA; 3175 3176 /* enable LBA */ 3177 tf->flags |= ATA_TFLAG_LBA; 3178 3179 /* 3180 * 12 and 16 byte CDBs use different offsets to 3181 * provide the various register values. 3182 */ 3183 if (cdb[0] == ATA_16) { 3184 /* 3185 * 16-byte CDB - may contain extended commands. 3186 * 3187 * If that is the case, copy the upper byte register values. 3188 */ 3189 if (cdb[1] & 0x01) { 3190 tf->hob_feature = cdb[3]; 3191 tf->hob_nsect = cdb[5]; 3192 tf->hob_lbal = cdb[7]; 3193 tf->hob_lbam = cdb[9]; 3194 tf->hob_lbah = cdb[11]; 3195 tf->flags |= ATA_TFLAG_LBA48; 3196 } else 3197 tf->flags &= ~ATA_TFLAG_LBA48; 3198 3199 /* 3200 * Always copy low byte, device and command registers. 3201 */ 3202 tf->feature = cdb[4]; 3203 tf->nsect = cdb[6]; 3204 tf->lbal = cdb[8]; 3205 tf->lbam = cdb[10]; 3206 tf->lbah = cdb[12]; 3207 tf->device = cdb[13]; 3208 tf->command = cdb[14]; 3209 } else { 3210 /* 3211 * 12-byte CDB - incapable of extended commands. 3212 */ 3213 tf->flags &= ~ATA_TFLAG_LBA48; 3214 3215 tf->feature = cdb[3]; 3216 tf->nsect = cdb[4]; 3217 tf->lbal = cdb[5]; 3218 tf->lbam = cdb[6]; 3219 tf->lbah = cdb[7]; 3220 tf->device = cdb[8]; 3221 tf->command = cdb[9]; 3222 } 3223 3224 /* For NCQ commands copy the tag value */ 3225 if (ata_is_ncq(tf->protocol)) 3226 tf->nsect = qc->tag << 3; 3227 3228 /* enforce correct master/slave bit */ 3229 tf->device = dev->devno ? 3230 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3231 3232 switch (tf->command) { 3233 /* READ/WRITE LONG use a non-standard sect_size */ 3234 case ATA_CMD_READ_LONG: 3235 case ATA_CMD_READ_LONG_ONCE: 3236 case ATA_CMD_WRITE_LONG: 3237 case ATA_CMD_WRITE_LONG_ONCE: 3238 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3239 fp = 1; 3240 goto invalid_fld; 3241 } 3242 qc->sect_size = scsi_bufflen(scmd); 3243 break; 3244 3245 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3246 case ATA_CMD_CFA_WRITE_NE: 3247 case ATA_CMD_CFA_TRANS_SECT: 3248 case ATA_CMD_CFA_WRITE_MULT_NE: 3249 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3250 case ATA_CMD_READ: 3251 case ATA_CMD_READ_EXT: 3252 case ATA_CMD_READ_QUEUED: 3253 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3254 case ATA_CMD_FPDMA_READ: 3255 case ATA_CMD_READ_MULTI: 3256 case ATA_CMD_READ_MULTI_EXT: 3257 case ATA_CMD_PIO_READ: 3258 case ATA_CMD_PIO_READ_EXT: 3259 case ATA_CMD_READ_STREAM_DMA_EXT: 3260 case ATA_CMD_READ_STREAM_EXT: 3261 case ATA_CMD_VERIFY: 3262 case ATA_CMD_VERIFY_EXT: 3263 case ATA_CMD_WRITE: 3264 case ATA_CMD_WRITE_EXT: 3265 case ATA_CMD_WRITE_FUA_EXT: 3266 case ATA_CMD_WRITE_QUEUED: 3267 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3268 case ATA_CMD_FPDMA_WRITE: 3269 case ATA_CMD_WRITE_MULTI: 3270 case ATA_CMD_WRITE_MULTI_EXT: 3271 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3272 case ATA_CMD_PIO_WRITE: 3273 case ATA_CMD_PIO_WRITE_EXT: 3274 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3275 case ATA_CMD_WRITE_STREAM_EXT: 3276 qc->sect_size = scmd->device->sector_size; 3277 break; 3278 3279 /* Everything else uses 512 byte "sectors" */ 3280 default: 3281 qc->sect_size = ATA_SECT_SIZE; 3282 } 3283 3284 /* 3285 * Set flags so that all registers will be written, pass on 3286 * write indication (used for PIO/DMA setup), result TF is 3287 * copied back and we don't whine too much about its failure. 3288 */ 3289 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3290 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3291 tf->flags |= ATA_TFLAG_WRITE; 3292 3293 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3294 3295 /* 3296 * Set transfer length. 3297 * 3298 * TODO: find out if we need to do more here to 3299 * cover scatter/gather case. 3300 */ 3301 ata_qc_set_pc_nbytes(qc); 3302 3303 /* We may not issue DMA commands if no DMA mode is set */ 3304 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3305 fp = 1; 3306 goto invalid_fld; 3307 } 3308 3309 /* sanity check for pio multi commands */ 3310 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3311 fp = 1; 3312 goto invalid_fld; 3313 } 3314 3315 if (is_multi_taskfile(tf)) { 3316 unsigned int multi_count = 1 << (cdb[1] >> 5); 3317 3318 /* compare the passed through multi_count 3319 * with the cached multi_count of libata 3320 */ 3321 if (multi_count != dev->multi_count) 3322 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3323 multi_count); 3324 } 3325 3326 /* 3327 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3328 * SET_FEATURES - XFER MODE must be preceded/succeeded 3329 * by an update to hardware-specific registers for each 3330 * controller (i.e. the reason for ->set_piomode(), 3331 * ->set_dmamode(), and ->post_set_mode() hooks). 3332 */ 3333 if (tf->command == ATA_CMD_SET_FEATURES && 3334 tf->feature == SETFEATURES_XFER) { 3335 fp = (cdb[0] == ATA_16) ? 4 : 3; 3336 goto invalid_fld; 3337 } 3338 3339 /* 3340 * Filter TPM commands by default. These provide an 3341 * essentially uncontrolled encrypted "back door" between 3342 * applications and the disk. Set libata.allow_tpm=1 if you 3343 * have a real reason for wanting to use them. This ensures 3344 * that installed software cannot easily mess stuff up without 3345 * user intent. DVR type users will probably ship with this enabled 3346 * for movie content management. 3347 * 3348 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3349 * for this and should do in future but that it is not sufficient as 3350 * DCS is an optional feature set. Thus we also do the software filter 3351 * so that we comply with the TC consortium stated goal that the user 3352 * can turn off TC features of their system. 3353 */ 3354 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3355 fp = (cdb[0] == ATA_16) ? 14 : 9; 3356 goto invalid_fld; 3357 } 3358 3359 return 0; 3360 3361 invalid_fld: 3362 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3363 return 1; 3364 } 3365 3366 /** 3367 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3368 * @cmd: SCSI command being translated 3369 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3370 * @sector: Starting sector 3371 * @count: Total Range of request in logical sectors 3372 * 3373 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3374 * descriptor. 3375 * 3376 * Upto 64 entries of the format: 3377 * 63:48 Range Length 3378 * 47:0 LBA 3379 * 3380 * Range Length of 0 is ignored. 3381 * LBA's should be sorted order and not overlap. 3382 * 3383 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3384 * 3385 * Return: Number of bytes copied into sglist. 3386 */ 3387 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3388 u64 sector, u32 count) 3389 { 3390 struct scsi_device *sdp = cmd->device; 3391 size_t len = sdp->sector_size; 3392 size_t r; 3393 __le64 *buf; 3394 u32 i = 0; 3395 unsigned long flags; 3396 3397 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3398 3399 if (len > ATA_SCSI_RBUF_SIZE) 3400 len = ATA_SCSI_RBUF_SIZE; 3401 3402 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3403 buf = ((void *)ata_scsi_rbuf); 3404 memset(buf, 0, len); 3405 while (i < trmax) { 3406 u64 entry = sector | 3407 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3408 buf[i++] = __cpu_to_le64(entry); 3409 if (count <= 0xffff) 3410 break; 3411 count -= 0xffff; 3412 sector += 0xffff; 3413 } 3414 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3415 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3416 3417 return r; 3418 } 3419 3420 /** 3421 * ata_format_dsm_trim_descr() - SATL Write Same to ATA SCT Write Same 3422 * @cmd: SCSI command being translated 3423 * @lba: Starting sector 3424 * @num: Number of sectors to be zero'd. 3425 * 3426 * Rewrite the WRITE SAME payload to be an SCT Write Same formatted 3427 * descriptor. 3428 * NOTE: Writes a pattern (0's) in the foreground. 3429 * 3430 * Return: Number of bytes copied into sglist. 3431 */ 3432 static size_t ata_format_sct_write_same(struct scsi_cmnd *cmd, u64 lba, u64 num) 3433 { 3434 struct scsi_device *sdp = cmd->device; 3435 size_t len = sdp->sector_size; 3436 size_t r; 3437 u16 *buf; 3438 unsigned long flags; 3439 3440 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3441 buf = ((void *)ata_scsi_rbuf); 3442 3443 put_unaligned_le16(0x0002, &buf[0]); /* SCT_ACT_WRITE_SAME */ 3444 put_unaligned_le16(0x0101, &buf[1]); /* WRITE PTRN FG */ 3445 put_unaligned_le64(lba, &buf[2]); 3446 put_unaligned_le64(num, &buf[6]); 3447 put_unaligned_le32(0u, &buf[10]); /* pattern */ 3448 3449 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3450 3451 if (len > ATA_SCSI_RBUF_SIZE) 3452 len = ATA_SCSI_RBUF_SIZE; 3453 3454 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3455 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3456 3457 return r; 3458 } 3459 3460 /** 3461 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3462 * @qc: Command to be translated 3463 * 3464 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3465 * an SCT Write Same command. 3466 * Based on WRITE SAME has the UNMAP flag 3467 * When set translate to DSM TRIM 3468 * When clear translate to SCT Write Same 3469 */ 3470 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3471 { 3472 struct ata_taskfile *tf = &qc->tf; 3473 struct scsi_cmnd *scmd = qc->scsicmd; 3474 struct scsi_device *sdp = scmd->device; 3475 size_t len = sdp->sector_size; 3476 struct ata_device *dev = qc->dev; 3477 const u8 *cdb = scmd->cmnd; 3478 u64 block; 3479 u32 n_block; 3480 const u32 trmax = len >> 3; 3481 u32 size; 3482 u16 fp; 3483 u8 bp = 0xff; 3484 u8 unmap = cdb[1] & 0x8; 3485 3486 /* we may not issue DMA commands if no DMA mode is set */ 3487 if (unlikely(!dev->dma_mode)) 3488 goto invalid_opcode; 3489 3490 if (unlikely(scmd->cmd_len < 16)) { 3491 fp = 15; 3492 goto invalid_fld; 3493 } 3494 scsi_16_lba_len(cdb, &block, &n_block); 3495 3496 if (unmap) { 3497 /* If trim is not enabled the cmd is invalid. */ 3498 if ((dev->horkage & ATA_HORKAGE_NOTRIM) || 3499 !ata_id_has_trim(dev->id)) { 3500 fp = 1; 3501 bp = 3; 3502 goto invalid_fld; 3503 } 3504 /* If the request is too large the cmd is invalid */ 3505 if (n_block > 0xffff * trmax) { 3506 fp = 2; 3507 goto invalid_fld; 3508 } 3509 } else { 3510 /* If write same is not available the cmd is invalid */ 3511 if (!ata_id_sct_write_same(dev->id)) { 3512 fp = 1; 3513 bp = 3; 3514 goto invalid_fld; 3515 } 3516 } 3517 3518 /* 3519 * WRITE SAME always has a sector sized buffer as payload, this 3520 * should never be a multiple entry S/G list. 3521 */ 3522 if (!scsi_sg_count(scmd)) 3523 goto invalid_param_len; 3524 3525 /* 3526 * size must match sector size in bytes 3527 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3528 * is defined as number of 512 byte blocks to be transferred. 3529 */ 3530 if (unmap) { 3531 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3532 if (size != len) 3533 goto invalid_param_len; 3534 3535 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3536 /* Newer devices support queued TRIM commands */ 3537 tf->protocol = ATA_PROT_NCQ; 3538 tf->command = ATA_CMD_FPDMA_SEND; 3539 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3540 tf->nsect = qc->tag << 3; 3541 tf->hob_feature = (size / 512) >> 8; 3542 tf->feature = size / 512; 3543 3544 tf->auxiliary = 1; 3545 } else { 3546 tf->protocol = ATA_PROT_DMA; 3547 tf->hob_feature = 0; 3548 tf->feature = ATA_DSM_TRIM; 3549 tf->hob_nsect = (size / 512) >> 8; 3550 tf->nsect = size / 512; 3551 tf->command = ATA_CMD_DSM; 3552 } 3553 } else { 3554 size = ata_format_sct_write_same(scmd, block, n_block); 3555 if (size != len) 3556 goto invalid_param_len; 3557 3558 tf->hob_feature = 0; 3559 tf->feature = 0; 3560 tf->hob_nsect = 0; 3561 tf->nsect = 1; 3562 tf->lbah = 0; 3563 tf->lbam = 0; 3564 tf->lbal = ATA_CMD_STANDBYNOW1; 3565 tf->hob_lbah = 0; 3566 tf->hob_lbam = 0; 3567 tf->hob_lbal = 0; 3568 tf->device = ATA_CMD_STANDBYNOW1; 3569 tf->protocol = ATA_PROT_DMA; 3570 tf->command = ATA_CMD_WRITE_LOG_DMA_EXT; 3571 if (unlikely(dev->flags & ATA_DFLAG_PIO)) 3572 tf->command = ATA_CMD_WRITE_LOG_EXT; 3573 } 3574 3575 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3576 ATA_TFLAG_WRITE; 3577 3578 ata_qc_set_pc_nbytes(qc); 3579 3580 return 0; 3581 3582 invalid_fld: 3583 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3584 return 1; 3585 invalid_param_len: 3586 /* "Parameter list length error" */ 3587 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3588 return 1; 3589 invalid_opcode: 3590 /* "Invalid command operation code" */ 3591 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3592 return 1; 3593 } 3594 3595 /** 3596 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3597 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3598 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3599 * 3600 * Yields a subset to satisfy scsi_report_opcode() 3601 * 3602 * LOCKING: 3603 * spin_lock_irqsave(host lock) 3604 */ 3605 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3606 { 3607 struct ata_device *dev = args->dev; 3608 u8 *cdb = args->cmd->cmnd; 3609 u8 supported = 0; 3610 unsigned int err = 0; 3611 3612 if (cdb[2] != 1) { 3613 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3614 err = 2; 3615 goto out; 3616 } 3617 switch (cdb[3]) { 3618 case INQUIRY: 3619 case MODE_SENSE: 3620 case MODE_SENSE_10: 3621 case READ_CAPACITY: 3622 case SERVICE_ACTION_IN_16: 3623 case REPORT_LUNS: 3624 case REQUEST_SENSE: 3625 case SYNCHRONIZE_CACHE: 3626 case REZERO_UNIT: 3627 case SEEK_6: 3628 case SEEK_10: 3629 case TEST_UNIT_READY: 3630 case SEND_DIAGNOSTIC: 3631 case MAINTENANCE_IN: 3632 case READ_6: 3633 case READ_10: 3634 case READ_16: 3635 case WRITE_6: 3636 case WRITE_10: 3637 case WRITE_16: 3638 case ATA_12: 3639 case ATA_16: 3640 case VERIFY: 3641 case VERIFY_16: 3642 case MODE_SELECT: 3643 case MODE_SELECT_10: 3644 case START_STOP: 3645 supported = 3; 3646 break; 3647 case WRITE_SAME_16: 3648 if (!ata_id_sct_write_same(dev->id)) 3649 break; 3650 /* fallthrough: if SCT ... only enable for ZBC */ 3651 case ZBC_IN: 3652 case ZBC_OUT: 3653 if (ata_id_zoned_cap(dev->id) || 3654 dev->class == ATA_DEV_ZAC) 3655 supported = 3; 3656 break; 3657 default: 3658 break; 3659 } 3660 out: 3661 rbuf[1] = supported; /* supported */ 3662 return err; 3663 } 3664 3665 /** 3666 * ata_scsi_report_zones_complete - convert ATA output 3667 * @qc: command structure returning the data 3668 * 3669 * Convert T-13 little-endian field representation into 3670 * T-10 big-endian field representation. 3671 * What a mess. 3672 */ 3673 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3674 { 3675 struct scsi_cmnd *scmd = qc->scsicmd; 3676 struct sg_mapping_iter miter; 3677 unsigned long flags; 3678 unsigned int bytes = 0; 3679 3680 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3681 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3682 3683 local_irq_save(flags); 3684 while (sg_miter_next(&miter)) { 3685 unsigned int offset = 0; 3686 3687 if (bytes == 0) { 3688 char *hdr; 3689 u32 list_length; 3690 u64 max_lba, opt_lba; 3691 u16 same; 3692 3693 /* Swizzle header */ 3694 hdr = miter.addr; 3695 list_length = get_unaligned_le32(&hdr[0]); 3696 same = get_unaligned_le16(&hdr[4]); 3697 max_lba = get_unaligned_le64(&hdr[8]); 3698 opt_lba = get_unaligned_le64(&hdr[16]); 3699 put_unaligned_be32(list_length, &hdr[0]); 3700 hdr[4] = same & 0xf; 3701 put_unaligned_be64(max_lba, &hdr[8]); 3702 put_unaligned_be64(opt_lba, &hdr[16]); 3703 offset += 64; 3704 bytes += 64; 3705 } 3706 while (offset < miter.length) { 3707 char *rec; 3708 u8 cond, type, non_seq, reset; 3709 u64 size, start, wp; 3710 3711 /* Swizzle zone descriptor */ 3712 rec = miter.addr + offset; 3713 type = rec[0] & 0xf; 3714 cond = (rec[1] >> 4) & 0xf; 3715 non_seq = (rec[1] & 2); 3716 reset = (rec[1] & 1); 3717 size = get_unaligned_le64(&rec[8]); 3718 start = get_unaligned_le64(&rec[16]); 3719 wp = get_unaligned_le64(&rec[24]); 3720 rec[0] = type; 3721 rec[1] = (cond << 4) | non_seq | reset; 3722 put_unaligned_be64(size, &rec[8]); 3723 put_unaligned_be64(start, &rec[16]); 3724 put_unaligned_be64(wp, &rec[24]); 3725 WARN_ON(offset + 64 > miter.length); 3726 offset += 64; 3727 bytes += 64; 3728 } 3729 } 3730 sg_miter_stop(&miter); 3731 local_irq_restore(flags); 3732 3733 ata_scsi_qc_complete(qc); 3734 } 3735 3736 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3737 { 3738 struct ata_taskfile *tf = &qc->tf; 3739 struct scsi_cmnd *scmd = qc->scsicmd; 3740 const u8 *cdb = scmd->cmnd; 3741 u16 sect, fp = (u16)-1; 3742 u8 sa, options, bp = 0xff; 3743 u64 block; 3744 u32 n_block; 3745 3746 if (unlikely(scmd->cmd_len < 16)) { 3747 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3748 scmd->cmd_len); 3749 fp = 15; 3750 goto invalid_fld; 3751 } 3752 scsi_16_lba_len(cdb, &block, &n_block); 3753 if (n_block != scsi_bufflen(scmd)) { 3754 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3755 n_block, scsi_bufflen(scmd)); 3756 goto invalid_param_len; 3757 } 3758 sa = cdb[1] & 0x1f; 3759 if (sa != ZI_REPORT_ZONES) { 3760 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3761 fp = 1; 3762 goto invalid_fld; 3763 } 3764 /* 3765 * ZAC allows only for transfers in 512 byte blocks, 3766 * and uses a 16 bit value for the transfer count. 3767 */ 3768 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3769 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3770 goto invalid_param_len; 3771 } 3772 sect = n_block / 512; 3773 options = cdb[14] & 0xbf; 3774 3775 if (ata_ncq_enabled(qc->dev) && 3776 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3777 tf->protocol = ATA_PROT_NCQ; 3778 tf->command = ATA_CMD_FPDMA_RECV; 3779 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3780 tf->nsect = qc->tag << 3; 3781 tf->feature = sect & 0xff; 3782 tf->hob_feature = (sect >> 8) & 0xff; 3783 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3784 } else { 3785 tf->command = ATA_CMD_ZAC_MGMT_IN; 3786 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3787 tf->protocol = ATA_PROT_DMA; 3788 tf->hob_feature = options; 3789 tf->hob_nsect = (sect >> 8) & 0xff; 3790 tf->nsect = sect & 0xff; 3791 } 3792 tf->device = ATA_LBA; 3793 tf->lbah = (block >> 16) & 0xff; 3794 tf->lbam = (block >> 8) & 0xff; 3795 tf->lbal = block & 0xff; 3796 tf->hob_lbah = (block >> 40) & 0xff; 3797 tf->hob_lbam = (block >> 32) & 0xff; 3798 tf->hob_lbal = (block >> 24) & 0xff; 3799 3800 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3801 qc->flags |= ATA_QCFLAG_RESULT_TF; 3802 3803 ata_qc_set_pc_nbytes(qc); 3804 3805 qc->complete_fn = ata_scsi_report_zones_complete; 3806 3807 return 0; 3808 3809 invalid_fld: 3810 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3811 return 1; 3812 3813 invalid_param_len: 3814 /* "Parameter list length error" */ 3815 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3816 return 1; 3817 } 3818 3819 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3820 { 3821 struct ata_taskfile *tf = &qc->tf; 3822 struct scsi_cmnd *scmd = qc->scsicmd; 3823 struct ata_device *dev = qc->dev; 3824 const u8 *cdb = scmd->cmnd; 3825 u8 all, sa; 3826 u64 block; 3827 u32 n_block; 3828 u16 fp = (u16)-1; 3829 3830 if (unlikely(scmd->cmd_len < 16)) { 3831 fp = 15; 3832 goto invalid_fld; 3833 } 3834 3835 sa = cdb[1] & 0x1f; 3836 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3837 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3838 fp = 1; 3839 goto invalid_fld; 3840 } 3841 3842 scsi_16_lba_len(cdb, &block, &n_block); 3843 if (n_block) { 3844 /* 3845 * ZAC MANAGEMENT OUT doesn't define any length 3846 */ 3847 goto invalid_param_len; 3848 } 3849 if (block > dev->n_sectors) 3850 goto out_of_range; 3851 3852 all = cdb[14] & 0x1; 3853 3854 if (ata_ncq_enabled(qc->dev) && 3855 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3856 tf->protocol = ATA_PROT_NCQ_NODATA; 3857 tf->command = ATA_CMD_NCQ_NON_DATA; 3858 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3859 tf->nsect = qc->tag << 3; 3860 tf->auxiliary = sa | ((u16)all << 8); 3861 } else { 3862 tf->protocol = ATA_PROT_NODATA; 3863 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3864 tf->feature = sa; 3865 tf->hob_feature = all; 3866 } 3867 tf->lbah = (block >> 16) & 0xff; 3868 tf->lbam = (block >> 8) & 0xff; 3869 tf->lbal = block & 0xff; 3870 tf->hob_lbah = (block >> 40) & 0xff; 3871 tf->hob_lbam = (block >> 32) & 0xff; 3872 tf->hob_lbal = (block >> 24) & 0xff; 3873 tf->device = ATA_LBA; 3874 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3875 3876 return 0; 3877 3878 invalid_fld: 3879 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3880 return 1; 3881 out_of_range: 3882 /* "Logical Block Address out of range" */ 3883 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00); 3884 return 1; 3885 invalid_param_len: 3886 /* "Parameter list length error" */ 3887 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3888 return 1; 3889 } 3890 3891 /** 3892 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3893 * @qc: Storage for translated ATA taskfile 3894 * @buf: input buffer 3895 * @len: number of valid bytes in the input buffer 3896 * @fp: out parameter for the failed field on error 3897 * 3898 * Prepare a taskfile to modify caching information for the device. 3899 * 3900 * LOCKING: 3901 * None. 3902 */ 3903 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3904 const u8 *buf, int len, u16 *fp) 3905 { 3906 struct ata_taskfile *tf = &qc->tf; 3907 struct ata_device *dev = qc->dev; 3908 u8 mpage[CACHE_MPAGE_LEN]; 3909 u8 wce; 3910 int i; 3911 3912 /* 3913 * The first two bytes of def_cache_mpage are a header, so offsets 3914 * in mpage are off by 2 compared to buf. Same for len. 3915 */ 3916 3917 if (len != CACHE_MPAGE_LEN - 2) { 3918 if (len < CACHE_MPAGE_LEN - 2) 3919 *fp = len; 3920 else 3921 *fp = CACHE_MPAGE_LEN - 2; 3922 return -EINVAL; 3923 } 3924 3925 wce = buf[0] & (1 << 2); 3926 3927 /* 3928 * Check that read-only bits are not modified. 3929 */ 3930 ata_msense_caching(dev->id, mpage, false); 3931 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3932 if (i == 0) 3933 continue; 3934 if (mpage[i + 2] != buf[i]) { 3935 *fp = i; 3936 return -EINVAL; 3937 } 3938 } 3939 3940 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3941 tf->protocol = ATA_PROT_NODATA; 3942 tf->nsect = 0; 3943 tf->command = ATA_CMD_SET_FEATURES; 3944 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3945 return 0; 3946 } 3947 3948 /** 3949 * ata_mselect_control - Simulate MODE SELECT for control page 3950 * @qc: Storage for translated ATA taskfile 3951 * @buf: input buffer 3952 * @len: number of valid bytes in the input buffer 3953 * @fp: out parameter for the failed field on error 3954 * 3955 * Prepare a taskfile to modify caching information for the device. 3956 * 3957 * LOCKING: 3958 * None. 3959 */ 3960 static int ata_mselect_control(struct ata_queued_cmd *qc, 3961 const u8 *buf, int len, u16 *fp) 3962 { 3963 struct ata_device *dev = qc->dev; 3964 u8 mpage[CONTROL_MPAGE_LEN]; 3965 u8 d_sense; 3966 int i; 3967 3968 /* 3969 * The first two bytes of def_control_mpage are a header, so offsets 3970 * in mpage are off by 2 compared to buf. Same for len. 3971 */ 3972 3973 if (len != CONTROL_MPAGE_LEN - 2) { 3974 if (len < CONTROL_MPAGE_LEN - 2) 3975 *fp = len; 3976 else 3977 *fp = CONTROL_MPAGE_LEN - 2; 3978 return -EINVAL; 3979 } 3980 3981 d_sense = buf[0] & (1 << 2); 3982 3983 /* 3984 * Check that read-only bits are not modified. 3985 */ 3986 ata_msense_control(dev, mpage, false); 3987 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3988 if (i == 0) 3989 continue; 3990 if (mpage[2 + i] != buf[i]) { 3991 *fp = i; 3992 return -EINVAL; 3993 } 3994 } 3995 if (d_sense & (1 << 2)) 3996 dev->flags |= ATA_DFLAG_D_SENSE; 3997 else 3998 dev->flags &= ~ATA_DFLAG_D_SENSE; 3999 return 0; 4000 } 4001 4002 /** 4003 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands 4004 * @qc: Storage for translated ATA taskfile 4005 * 4006 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 4007 * Assume this is invoked for direct access devices (e.g. disks) only. 4008 * There should be no block descriptor for other device types. 4009 * 4010 * LOCKING: 4011 * spin_lock_irqsave(host lock) 4012 */ 4013 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 4014 { 4015 struct scsi_cmnd *scmd = qc->scsicmd; 4016 const u8 *cdb = scmd->cmnd; 4017 const u8 *p; 4018 u8 pg, spg; 4019 unsigned six_byte, pg_len, hdr_len, bd_len; 4020 int len; 4021 u16 fp = (u16)-1; 4022 u8 bp = 0xff; 4023 4024 VPRINTK("ENTER\n"); 4025 4026 six_byte = (cdb[0] == MODE_SELECT); 4027 if (six_byte) { 4028 if (scmd->cmd_len < 5) { 4029 fp = 4; 4030 goto invalid_fld; 4031 } 4032 4033 len = cdb[4]; 4034 hdr_len = 4; 4035 } else { 4036 if (scmd->cmd_len < 9) { 4037 fp = 8; 4038 goto invalid_fld; 4039 } 4040 4041 len = (cdb[7] << 8) + cdb[8]; 4042 hdr_len = 8; 4043 } 4044 4045 /* We only support PF=1, SP=0. */ 4046 if ((cdb[1] & 0x11) != 0x10) { 4047 fp = 1; 4048 bp = (cdb[1] & 0x01) ? 1 : 5; 4049 goto invalid_fld; 4050 } 4051 4052 /* Test early for possible overrun. */ 4053 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 4054 goto invalid_param_len; 4055 4056 p = page_address(sg_page(scsi_sglist(scmd))); 4057 4058 /* Move past header and block descriptors. */ 4059 if (len < hdr_len) 4060 goto invalid_param_len; 4061 4062 if (six_byte) 4063 bd_len = p[3]; 4064 else 4065 bd_len = (p[6] << 8) + p[7]; 4066 4067 len -= hdr_len; 4068 p += hdr_len; 4069 if (len < bd_len) 4070 goto invalid_param_len; 4071 if (bd_len != 0 && bd_len != 8) { 4072 fp = (six_byte) ? 3 : 6; 4073 fp += bd_len + hdr_len; 4074 goto invalid_param; 4075 } 4076 4077 len -= bd_len; 4078 p += bd_len; 4079 if (len == 0) 4080 goto skip; 4081 4082 /* Parse both possible formats for the mode page headers. */ 4083 pg = p[0] & 0x3f; 4084 if (p[0] & 0x40) { 4085 if (len < 4) 4086 goto invalid_param_len; 4087 4088 spg = p[1]; 4089 pg_len = (p[2] << 8) | p[3]; 4090 p += 4; 4091 len -= 4; 4092 } else { 4093 if (len < 2) 4094 goto invalid_param_len; 4095 4096 spg = 0; 4097 pg_len = p[1]; 4098 p += 2; 4099 len -= 2; 4100 } 4101 4102 /* 4103 * No mode subpages supported (yet) but asking for _all_ 4104 * subpages may be valid 4105 */ 4106 if (spg && (spg != ALL_SUB_MPAGES)) { 4107 fp = (p[0] & 0x40) ? 1 : 0; 4108 fp += hdr_len + bd_len; 4109 goto invalid_param; 4110 } 4111 if (pg_len > len) 4112 goto invalid_param_len; 4113 4114 switch (pg) { 4115 case CACHE_MPAGE: 4116 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4117 fp += hdr_len + bd_len; 4118 goto invalid_param; 4119 } 4120 break; 4121 case CONTROL_MPAGE: 4122 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 4123 fp += hdr_len + bd_len; 4124 goto invalid_param; 4125 } else { 4126 goto skip; /* No ATA command to send */ 4127 } 4128 break; 4129 default: /* invalid page code */ 4130 fp = bd_len + hdr_len; 4131 goto invalid_param; 4132 } 4133 4134 /* 4135 * Only one page has changeable data, so we only support setting one 4136 * page at a time. 4137 */ 4138 if (len > pg_len) 4139 goto invalid_param; 4140 4141 return 0; 4142 4143 invalid_fld: 4144 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4145 return 1; 4146 4147 invalid_param: 4148 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4149 return 1; 4150 4151 invalid_param_len: 4152 /* "Parameter list length error" */ 4153 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4154 return 1; 4155 4156 skip: 4157 scmd->result = SAM_STAT_GOOD; 4158 return 1; 4159 } 4160 4161 /** 4162 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4163 * @dev: ATA device 4164 * @cmd: SCSI command opcode to consider 4165 * 4166 * Look up the SCSI command given, and determine whether the 4167 * SCSI command is to be translated or simulated. 4168 * 4169 * RETURNS: 4170 * Pointer to translation function if possible, %NULL if not. 4171 */ 4172 4173 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4174 { 4175 switch (cmd) { 4176 case READ_6: 4177 case READ_10: 4178 case READ_16: 4179 4180 case WRITE_6: 4181 case WRITE_10: 4182 case WRITE_16: 4183 return ata_scsi_rw_xlat; 4184 4185 case WRITE_SAME_16: 4186 return ata_scsi_write_same_xlat; 4187 4188 case SYNCHRONIZE_CACHE: 4189 if (ata_try_flush_cache(dev)) 4190 return ata_scsi_flush_xlat; 4191 break; 4192 4193 case VERIFY: 4194 case VERIFY_16: 4195 return ata_scsi_verify_xlat; 4196 4197 case ATA_12: 4198 case ATA_16: 4199 return ata_scsi_pass_thru; 4200 4201 case MODE_SELECT: 4202 case MODE_SELECT_10: 4203 return ata_scsi_mode_select_xlat; 4204 break; 4205 4206 case ZBC_IN: 4207 return ata_scsi_zbc_in_xlat; 4208 4209 case ZBC_OUT: 4210 return ata_scsi_zbc_out_xlat; 4211 4212 case START_STOP: 4213 return ata_scsi_start_stop_xlat; 4214 } 4215 4216 return NULL; 4217 } 4218 4219 /** 4220 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 4221 * @ap: ATA port to which the command was being sent 4222 * @cmd: SCSI command to dump 4223 * 4224 * Prints the contents of a SCSI command via printk(). 4225 */ 4226 4227 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 4228 struct scsi_cmnd *cmd) 4229 { 4230 #ifdef ATA_DEBUG 4231 struct scsi_device *scsidev = cmd->device; 4232 4233 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n", 4234 ap->print_id, 4235 scsidev->channel, scsidev->id, scsidev->lun, 4236 cmd->cmnd); 4237 #endif 4238 } 4239 4240 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 4241 struct ata_device *dev) 4242 { 4243 u8 scsi_op = scmd->cmnd[0]; 4244 ata_xlat_func_t xlat_func; 4245 int rc = 0; 4246 4247 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4248 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 4249 goto bad_cdb_len; 4250 4251 xlat_func = ata_get_xlat_func(dev, scsi_op); 4252 } else { 4253 if (unlikely(!scmd->cmd_len)) 4254 goto bad_cdb_len; 4255 4256 xlat_func = NULL; 4257 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4258 /* relay SCSI command to ATAPI device */ 4259 int len = COMMAND_SIZE(scsi_op); 4260 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 4261 goto bad_cdb_len; 4262 4263 xlat_func = atapi_xlat; 4264 } else { 4265 /* ATA_16 passthru, treat as an ATA command */ 4266 if (unlikely(scmd->cmd_len > 16)) 4267 goto bad_cdb_len; 4268 4269 xlat_func = ata_get_xlat_func(dev, scsi_op); 4270 } 4271 } 4272 4273 if (xlat_func) 4274 rc = ata_scsi_translate(dev, scmd, xlat_func); 4275 else 4276 ata_scsi_simulate(dev, scmd); 4277 4278 return rc; 4279 4280 bad_cdb_len: 4281 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4282 scmd->cmd_len, scsi_op, dev->cdb_len); 4283 scmd->result = DID_ERROR << 16; 4284 scmd->scsi_done(scmd); 4285 return 0; 4286 } 4287 4288 /** 4289 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4290 * @shost: SCSI host of command to be sent 4291 * @cmd: SCSI command to be sent 4292 * 4293 * In some cases, this function translates SCSI commands into 4294 * ATA taskfiles, and queues the taskfiles to be sent to 4295 * hardware. In other cases, this function simulates a 4296 * SCSI device by evaluating and responding to certain 4297 * SCSI commands. This creates the overall effect of 4298 * ATA and ATAPI devices appearing as SCSI devices. 4299 * 4300 * LOCKING: 4301 * ATA host lock 4302 * 4303 * RETURNS: 4304 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4305 * 0 otherwise. 4306 */ 4307 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4308 { 4309 struct ata_port *ap; 4310 struct ata_device *dev; 4311 struct scsi_device *scsidev = cmd->device; 4312 int rc = 0; 4313 unsigned long irq_flags; 4314 4315 ap = ata_shost_to_port(shost); 4316 4317 spin_lock_irqsave(ap->lock, irq_flags); 4318 4319 ata_scsi_dump_cdb(ap, cmd); 4320 4321 dev = ata_scsi_find_dev(ap, scsidev); 4322 if (likely(dev)) 4323 rc = __ata_scsi_queuecmd(cmd, dev); 4324 else { 4325 cmd->result = (DID_BAD_TARGET << 16); 4326 cmd->scsi_done(cmd); 4327 } 4328 4329 spin_unlock_irqrestore(ap->lock, irq_flags); 4330 4331 return rc; 4332 } 4333 4334 /** 4335 * ata_scsi_simulate - simulate SCSI command on ATA device 4336 * @dev: the target device 4337 * @cmd: SCSI command being sent to device. 4338 * 4339 * Interprets and directly executes a select list of SCSI commands 4340 * that can be handled internally. 4341 * 4342 * LOCKING: 4343 * spin_lock_irqsave(host lock) 4344 */ 4345 4346 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4347 { 4348 struct ata_scsi_args args; 4349 const u8 *scsicmd = cmd->cmnd; 4350 u8 tmp8; 4351 4352 args.dev = dev; 4353 args.id = dev->id; 4354 args.cmd = cmd; 4355 args.done = cmd->scsi_done; 4356 4357 switch(scsicmd[0]) { 4358 case INQUIRY: 4359 if (scsicmd[1] & 2) /* is CmdDt set? */ 4360 ata_scsi_invalid_field(dev, cmd, 1); 4361 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4362 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4363 else switch (scsicmd[2]) { 4364 case 0x00: 4365 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4366 break; 4367 case 0x80: 4368 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4369 break; 4370 case 0x83: 4371 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4372 break; 4373 case 0x89: 4374 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4375 break; 4376 case 0xb0: 4377 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4378 break; 4379 case 0xb1: 4380 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4381 break; 4382 case 0xb2: 4383 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4384 break; 4385 case 0xb6: 4386 if (dev->flags & ATA_DFLAG_ZAC) { 4387 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4388 break; 4389 } 4390 /* Fallthrough */ 4391 default: 4392 ata_scsi_invalid_field(dev, cmd, 2); 4393 break; 4394 } 4395 break; 4396 4397 case MODE_SENSE: 4398 case MODE_SENSE_10: 4399 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4400 break; 4401 4402 case READ_CAPACITY: 4403 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4404 break; 4405 4406 case SERVICE_ACTION_IN_16: 4407 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4408 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4409 else 4410 ata_scsi_invalid_field(dev, cmd, 1); 4411 break; 4412 4413 case REPORT_LUNS: 4414 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4415 break; 4416 4417 case REQUEST_SENSE: 4418 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4419 cmd->result = (DRIVER_SENSE << 24); 4420 cmd->scsi_done(cmd); 4421 break; 4422 4423 /* if we reach this, then writeback caching is disabled, 4424 * turning this into a no-op. 4425 */ 4426 case SYNCHRONIZE_CACHE: 4427 /* fall through */ 4428 4429 /* no-op's, complete with success */ 4430 case REZERO_UNIT: 4431 case SEEK_6: 4432 case SEEK_10: 4433 case TEST_UNIT_READY: 4434 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 4435 break; 4436 4437 case SEND_DIAGNOSTIC: 4438 tmp8 = scsicmd[1] & ~(1 << 3); 4439 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) 4440 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 4441 else 4442 ata_scsi_invalid_field(dev, cmd, 1); 4443 break; 4444 4445 case MAINTENANCE_IN: 4446 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4447 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4448 else 4449 ata_scsi_invalid_field(dev, cmd, 1); 4450 break; 4451 4452 /* all other commands */ 4453 default: 4454 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4455 /* "Invalid command operation code" */ 4456 cmd->scsi_done(cmd); 4457 break; 4458 } 4459 } 4460 4461 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4462 { 4463 int i, rc; 4464 4465 for (i = 0; i < host->n_ports; i++) { 4466 struct ata_port *ap = host->ports[i]; 4467 struct Scsi_Host *shost; 4468 4469 rc = -ENOMEM; 4470 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4471 if (!shost) 4472 goto err_alloc; 4473 4474 shost->eh_noresume = 1; 4475 *(struct ata_port **)&shost->hostdata[0] = ap; 4476 ap->scsi_host = shost; 4477 4478 shost->transportt = ata_scsi_transport_template; 4479 shost->unique_id = ap->print_id; 4480 shost->max_id = 16; 4481 shost->max_lun = 1; 4482 shost->max_channel = 1; 4483 shost->max_cmd_len = 16; 4484 4485 /* Schedule policy is determined by ->qc_defer() 4486 * callback and it needs to see every deferred qc. 4487 * Set host_blocked to 1 to prevent SCSI midlayer from 4488 * automatically deferring requests. 4489 */ 4490 shost->max_host_blocked = 1; 4491 4492 rc = scsi_add_host_with_dma(ap->scsi_host, 4493 &ap->tdev, ap->host->dev); 4494 if (rc) 4495 goto err_add; 4496 } 4497 4498 return 0; 4499 4500 err_add: 4501 scsi_host_put(host->ports[i]->scsi_host); 4502 err_alloc: 4503 while (--i >= 0) { 4504 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4505 4506 scsi_remove_host(shost); 4507 scsi_host_put(shost); 4508 } 4509 return rc; 4510 } 4511 4512 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4513 { 4514 int tries = 5; 4515 struct ata_device *last_failed_dev = NULL; 4516 struct ata_link *link; 4517 struct ata_device *dev; 4518 4519 repeat: 4520 ata_for_each_link(link, ap, EDGE) { 4521 ata_for_each_dev(dev, link, ENABLED) { 4522 struct scsi_device *sdev; 4523 int channel = 0, id = 0; 4524 4525 if (dev->sdev) 4526 continue; 4527 4528 if (ata_is_host_link(link)) 4529 id = dev->devno; 4530 else 4531 channel = link->pmp; 4532 4533 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4534 NULL); 4535 if (!IS_ERR(sdev)) { 4536 dev->sdev = sdev; 4537 scsi_device_put(sdev); 4538 } else { 4539 dev->sdev = NULL; 4540 } 4541 } 4542 } 4543 4544 /* If we scanned while EH was in progress or allocation 4545 * failure occurred, scan would have failed silently. Check 4546 * whether all devices are attached. 4547 */ 4548 ata_for_each_link(link, ap, EDGE) { 4549 ata_for_each_dev(dev, link, ENABLED) { 4550 if (!dev->sdev) 4551 goto exit_loop; 4552 } 4553 } 4554 exit_loop: 4555 if (!link) 4556 return; 4557 4558 /* we're missing some SCSI devices */ 4559 if (sync) { 4560 /* If caller requested synchrnous scan && we've made 4561 * any progress, sleep briefly and repeat. 4562 */ 4563 if (dev != last_failed_dev) { 4564 msleep(100); 4565 last_failed_dev = dev; 4566 goto repeat; 4567 } 4568 4569 /* We might be failing to detect boot device, give it 4570 * a few more chances. 4571 */ 4572 if (--tries) { 4573 msleep(100); 4574 goto repeat; 4575 } 4576 4577 ata_port_err(ap, 4578 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4579 } 4580 4581 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4582 round_jiffies_relative(HZ)); 4583 } 4584 4585 /** 4586 * ata_scsi_offline_dev - offline attached SCSI device 4587 * @dev: ATA device to offline attached SCSI device for 4588 * 4589 * This function is called from ata_eh_hotplug() and responsible 4590 * for taking the SCSI device attached to @dev offline. This 4591 * function is called with host lock which protects dev->sdev 4592 * against clearing. 4593 * 4594 * LOCKING: 4595 * spin_lock_irqsave(host lock) 4596 * 4597 * RETURNS: 4598 * 1 if attached SCSI device exists, 0 otherwise. 4599 */ 4600 int ata_scsi_offline_dev(struct ata_device *dev) 4601 { 4602 if (dev->sdev) { 4603 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4604 return 1; 4605 } 4606 return 0; 4607 } 4608 4609 /** 4610 * ata_scsi_remove_dev - remove attached SCSI device 4611 * @dev: ATA device to remove attached SCSI device for 4612 * 4613 * This function is called from ata_eh_scsi_hotplug() and 4614 * responsible for removing the SCSI device attached to @dev. 4615 * 4616 * LOCKING: 4617 * Kernel thread context (may sleep). 4618 */ 4619 static void ata_scsi_remove_dev(struct ata_device *dev) 4620 { 4621 struct ata_port *ap = dev->link->ap; 4622 struct scsi_device *sdev; 4623 unsigned long flags; 4624 4625 /* Alas, we need to grab scan_mutex to ensure SCSI device 4626 * state doesn't change underneath us and thus 4627 * scsi_device_get() always succeeds. The mutex locking can 4628 * be removed if there is __scsi_device_get() interface which 4629 * increments reference counts regardless of device state. 4630 */ 4631 mutex_lock(&ap->scsi_host->scan_mutex); 4632 spin_lock_irqsave(ap->lock, flags); 4633 4634 /* clearing dev->sdev is protected by host lock */ 4635 sdev = dev->sdev; 4636 dev->sdev = NULL; 4637 4638 if (sdev) { 4639 /* If user initiated unplug races with us, sdev can go 4640 * away underneath us after the host lock and 4641 * scan_mutex are released. Hold onto it. 4642 */ 4643 if (scsi_device_get(sdev) == 0) { 4644 /* The following ensures the attached sdev is 4645 * offline on return from ata_scsi_offline_dev() 4646 * regardless it wins or loses the race 4647 * against this function. 4648 */ 4649 scsi_device_set_state(sdev, SDEV_OFFLINE); 4650 } else { 4651 WARN_ON(1); 4652 sdev = NULL; 4653 } 4654 } 4655 4656 spin_unlock_irqrestore(ap->lock, flags); 4657 mutex_unlock(&ap->scsi_host->scan_mutex); 4658 4659 if (sdev) { 4660 ata_dev_info(dev, "detaching (SCSI %s)\n", 4661 dev_name(&sdev->sdev_gendev)); 4662 4663 scsi_remove_device(sdev); 4664 scsi_device_put(sdev); 4665 } 4666 } 4667 4668 static void ata_scsi_handle_link_detach(struct ata_link *link) 4669 { 4670 struct ata_port *ap = link->ap; 4671 struct ata_device *dev; 4672 4673 ata_for_each_dev(dev, link, ALL) { 4674 unsigned long flags; 4675 4676 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4677 continue; 4678 4679 spin_lock_irqsave(ap->lock, flags); 4680 dev->flags &= ~ATA_DFLAG_DETACHED; 4681 spin_unlock_irqrestore(ap->lock, flags); 4682 4683 if (zpodd_dev_enabled(dev)) 4684 zpodd_exit(dev); 4685 4686 ata_scsi_remove_dev(dev); 4687 } 4688 } 4689 4690 /** 4691 * ata_scsi_media_change_notify - send media change event 4692 * @dev: Pointer to the disk device with media change event 4693 * 4694 * Tell the block layer to send a media change notification 4695 * event. 4696 * 4697 * LOCKING: 4698 * spin_lock_irqsave(host lock) 4699 */ 4700 void ata_scsi_media_change_notify(struct ata_device *dev) 4701 { 4702 if (dev->sdev) 4703 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4704 GFP_ATOMIC); 4705 } 4706 4707 /** 4708 * ata_scsi_hotplug - SCSI part of hotplug 4709 * @work: Pointer to ATA port to perform SCSI hotplug on 4710 * 4711 * Perform SCSI part of hotplug. It's executed from a separate 4712 * workqueue after EH completes. This is necessary because SCSI 4713 * hot plugging requires working EH and hot unplugging is 4714 * synchronized with hot plugging with a mutex. 4715 * 4716 * LOCKING: 4717 * Kernel thread context (may sleep). 4718 */ 4719 void ata_scsi_hotplug(struct work_struct *work) 4720 { 4721 struct ata_port *ap = 4722 container_of(work, struct ata_port, hotplug_task.work); 4723 int i; 4724 4725 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4726 DPRINTK("ENTER/EXIT - unloading\n"); 4727 return; 4728 } 4729 4730 /* 4731 * XXX - UGLY HACK 4732 * 4733 * The block layer suspend/resume path is fundamentally broken due 4734 * to freezable kthreads and workqueue and may deadlock if a block 4735 * device gets removed while resume is in progress. I don't know 4736 * what the solution is short of removing freezable kthreads and 4737 * workqueues altogether. 4738 * 4739 * The following is an ugly hack to avoid kicking off device 4740 * removal while freezer is active. This is a joke but does avoid 4741 * this particular deadlock scenario. 4742 * 4743 * https://bugzilla.kernel.org/show_bug.cgi?id=62801 4744 * http://marc.info/?l=linux-kernel&m=138695698516487 4745 */ 4746 #ifdef CONFIG_FREEZER 4747 while (pm_freezing) 4748 msleep(10); 4749 #endif 4750 4751 DPRINTK("ENTER\n"); 4752 mutex_lock(&ap->scsi_scan_mutex); 4753 4754 /* Unplug detached devices. We cannot use link iterator here 4755 * because PMP links have to be scanned even if PMP is 4756 * currently not attached. Iterate manually. 4757 */ 4758 ata_scsi_handle_link_detach(&ap->link); 4759 if (ap->pmp_link) 4760 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4761 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4762 4763 /* scan for new ones */ 4764 ata_scsi_scan_host(ap, 0); 4765 4766 mutex_unlock(&ap->scsi_scan_mutex); 4767 DPRINTK("EXIT\n"); 4768 } 4769 4770 /** 4771 * ata_scsi_user_scan - indication for user-initiated bus scan 4772 * @shost: SCSI host to scan 4773 * @channel: Channel to scan 4774 * @id: ID to scan 4775 * @lun: LUN to scan 4776 * 4777 * This function is called when user explicitly requests bus 4778 * scan. Set probe pending flag and invoke EH. 4779 * 4780 * LOCKING: 4781 * SCSI layer (we don't care) 4782 * 4783 * RETURNS: 4784 * Zero. 4785 */ 4786 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4787 unsigned int id, u64 lun) 4788 { 4789 struct ata_port *ap = ata_shost_to_port(shost); 4790 unsigned long flags; 4791 int devno, rc = 0; 4792 4793 if (!ap->ops->error_handler) 4794 return -EOPNOTSUPP; 4795 4796 if (lun != SCAN_WILD_CARD && lun) 4797 return -EINVAL; 4798 4799 if (!sata_pmp_attached(ap)) { 4800 if (channel != SCAN_WILD_CARD && channel) 4801 return -EINVAL; 4802 devno = id; 4803 } else { 4804 if (id != SCAN_WILD_CARD && id) 4805 return -EINVAL; 4806 devno = channel; 4807 } 4808 4809 spin_lock_irqsave(ap->lock, flags); 4810 4811 if (devno == SCAN_WILD_CARD) { 4812 struct ata_link *link; 4813 4814 ata_for_each_link(link, ap, EDGE) { 4815 struct ata_eh_info *ehi = &link->eh_info; 4816 ehi->probe_mask |= ATA_ALL_DEVICES; 4817 ehi->action |= ATA_EH_RESET; 4818 } 4819 } else { 4820 struct ata_device *dev = ata_find_dev(ap, devno); 4821 4822 if (dev) { 4823 struct ata_eh_info *ehi = &dev->link->eh_info; 4824 ehi->probe_mask |= 1 << dev->devno; 4825 ehi->action |= ATA_EH_RESET; 4826 } else 4827 rc = -EINVAL; 4828 } 4829 4830 if (rc == 0) { 4831 ata_port_schedule_eh(ap); 4832 spin_unlock_irqrestore(ap->lock, flags); 4833 ata_port_wait_eh(ap); 4834 } else 4835 spin_unlock_irqrestore(ap->lock, flags); 4836 4837 return rc; 4838 } 4839 4840 /** 4841 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4842 * @work: Pointer to ATA port to perform scsi_rescan_device() 4843 * 4844 * After ATA pass thru (SAT) commands are executed successfully, 4845 * libata need to propagate the changes to SCSI layer. 4846 * 4847 * LOCKING: 4848 * Kernel thread context (may sleep). 4849 */ 4850 void ata_scsi_dev_rescan(struct work_struct *work) 4851 { 4852 struct ata_port *ap = 4853 container_of(work, struct ata_port, scsi_rescan_task); 4854 struct ata_link *link; 4855 struct ata_device *dev; 4856 unsigned long flags; 4857 4858 mutex_lock(&ap->scsi_scan_mutex); 4859 spin_lock_irqsave(ap->lock, flags); 4860 4861 ata_for_each_link(link, ap, EDGE) { 4862 ata_for_each_dev(dev, link, ENABLED) { 4863 struct scsi_device *sdev = dev->sdev; 4864 4865 if (!sdev) 4866 continue; 4867 if (scsi_device_get(sdev)) 4868 continue; 4869 4870 spin_unlock_irqrestore(ap->lock, flags); 4871 scsi_rescan_device(&(sdev->sdev_gendev)); 4872 scsi_device_put(sdev); 4873 spin_lock_irqsave(ap->lock, flags); 4874 } 4875 } 4876 4877 spin_unlock_irqrestore(ap->lock, flags); 4878 mutex_unlock(&ap->scsi_scan_mutex); 4879 } 4880 4881 /** 4882 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 4883 * @host: ATA host container for all SAS ports 4884 * @port_info: Information from low-level host driver 4885 * @shost: SCSI host that the scsi device is attached to 4886 * 4887 * LOCKING: 4888 * PCI/etc. bus probe sem. 4889 * 4890 * RETURNS: 4891 * ata_port pointer on success / NULL on failure. 4892 */ 4893 4894 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 4895 struct ata_port_info *port_info, 4896 struct Scsi_Host *shost) 4897 { 4898 struct ata_port *ap; 4899 4900 ap = ata_port_alloc(host); 4901 if (!ap) 4902 return NULL; 4903 4904 ap->port_no = 0; 4905 ap->lock = &host->lock; 4906 ap->pio_mask = port_info->pio_mask; 4907 ap->mwdma_mask = port_info->mwdma_mask; 4908 ap->udma_mask = port_info->udma_mask; 4909 ap->flags |= port_info->flags; 4910 ap->ops = port_info->port_ops; 4911 ap->cbl = ATA_CBL_SATA; 4912 4913 return ap; 4914 } 4915 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 4916 4917 /** 4918 * ata_sas_port_start - Set port up for dma. 4919 * @ap: Port to initialize 4920 * 4921 * Called just after data structures for each port are 4922 * initialized. 4923 * 4924 * May be used as the port_start() entry in ata_port_operations. 4925 * 4926 * LOCKING: 4927 * Inherited from caller. 4928 */ 4929 int ata_sas_port_start(struct ata_port *ap) 4930 { 4931 /* 4932 * the port is marked as frozen at allocation time, but if we don't 4933 * have new eh, we won't thaw it 4934 */ 4935 if (!ap->ops->error_handler) 4936 ap->pflags &= ~ATA_PFLAG_FROZEN; 4937 return 0; 4938 } 4939 EXPORT_SYMBOL_GPL(ata_sas_port_start); 4940 4941 /** 4942 * ata_port_stop - Undo ata_sas_port_start() 4943 * @ap: Port to shut down 4944 * 4945 * May be used as the port_stop() entry in ata_port_operations. 4946 * 4947 * LOCKING: 4948 * Inherited from caller. 4949 */ 4950 4951 void ata_sas_port_stop(struct ata_port *ap) 4952 { 4953 } 4954 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 4955 4956 /** 4957 * ata_sas_async_probe - simply schedule probing and return 4958 * @ap: Port to probe 4959 * 4960 * For batch scheduling of probe for sas attached ata devices, assumes 4961 * the port has already been through ata_sas_port_init() 4962 */ 4963 void ata_sas_async_probe(struct ata_port *ap) 4964 { 4965 __ata_port_probe(ap); 4966 } 4967 EXPORT_SYMBOL_GPL(ata_sas_async_probe); 4968 4969 int ata_sas_sync_probe(struct ata_port *ap) 4970 { 4971 return ata_port_probe(ap); 4972 } 4973 EXPORT_SYMBOL_GPL(ata_sas_sync_probe); 4974 4975 4976 /** 4977 * ata_sas_port_init - Initialize a SATA device 4978 * @ap: SATA port to initialize 4979 * 4980 * LOCKING: 4981 * PCI/etc. bus probe sem. 4982 * 4983 * RETURNS: 4984 * Zero on success, non-zero on error. 4985 */ 4986 4987 int ata_sas_port_init(struct ata_port *ap) 4988 { 4989 int rc = ap->ops->port_start(ap); 4990 4991 if (rc) 4992 return rc; 4993 ap->print_id = atomic_inc_return(&ata_print_id); 4994 return 0; 4995 } 4996 EXPORT_SYMBOL_GPL(ata_sas_port_init); 4997 4998 /** 4999 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 5000 * @ap: SATA port to destroy 5001 * 5002 */ 5003 5004 void ata_sas_port_destroy(struct ata_port *ap) 5005 { 5006 if (ap->ops->port_stop) 5007 ap->ops->port_stop(ap); 5008 kfree(ap); 5009 } 5010 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 5011 5012 /** 5013 * ata_sas_slave_configure - Default slave_config routine for libata devices 5014 * @sdev: SCSI device to configure 5015 * @ap: ATA port to which SCSI device is attached 5016 * 5017 * RETURNS: 5018 * Zero. 5019 */ 5020 5021 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 5022 { 5023 ata_scsi_sdev_config(sdev); 5024 ata_scsi_dev_config(sdev, ap->link.device); 5025 return 0; 5026 } 5027 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 5028 5029 /** 5030 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 5031 * @cmd: SCSI command to be sent 5032 * @ap: ATA port to which the command is being sent 5033 * 5034 * RETURNS: 5035 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 5036 * 0 otherwise. 5037 */ 5038 5039 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 5040 { 5041 int rc = 0; 5042 5043 ata_scsi_dump_cdb(ap, cmd); 5044 5045 if (likely(ata_dev_enabled(ap->link.device))) 5046 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 5047 else { 5048 cmd->result = (DID_BAD_TARGET << 16); 5049 cmd->scsi_done(cmd); 5050 } 5051 return rc; 5052 } 5053 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 5054 5055 int ata_sas_allocate_tag(struct ata_port *ap) 5056 { 5057 unsigned int max_queue = ap->host->n_tags; 5058 unsigned int i, tag; 5059 5060 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) { 5061 tag = tag < max_queue ? tag : 0; 5062 5063 /* the last tag is reserved for internal command. */ 5064 if (tag == ATA_TAG_INTERNAL) 5065 continue; 5066 5067 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) { 5068 ap->sas_last_tag = tag; 5069 return tag; 5070 } 5071 } 5072 return -1; 5073 } 5074 5075 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) 5076 { 5077 clear_bit(tag, &ap->sas_tag_allocated); 5078 } 5079