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 /** 488 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 489 * @sdev: SCSI device for which BIOS geometry is to be determined 490 * @bdev: block device associated with @sdev 491 * @capacity: capacity of SCSI device 492 * @geom: location to which geometry will be output 493 * 494 * Generic bios head/sector/cylinder calculator 495 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 496 * mapping. Some situations may arise where the disk is not 497 * bootable if this is not used. 498 * 499 * LOCKING: 500 * Defined by the SCSI layer. We don't really care. 501 * 502 * RETURNS: 503 * Zero. 504 */ 505 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 506 sector_t capacity, int geom[]) 507 { 508 geom[0] = 255; 509 geom[1] = 63; 510 sector_div(capacity, 255*63); 511 geom[2] = capacity; 512 513 return 0; 514 } 515 516 /** 517 * ata_scsi_unlock_native_capacity - unlock native capacity 518 * @sdev: SCSI device to adjust device capacity for 519 * 520 * This function is called if a partition on @sdev extends beyond 521 * the end of the device. It requests EH to unlock HPA. 522 * 523 * LOCKING: 524 * Defined by the SCSI layer. Might sleep. 525 */ 526 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 527 { 528 struct ata_port *ap = ata_shost_to_port(sdev->host); 529 struct ata_device *dev; 530 unsigned long flags; 531 532 spin_lock_irqsave(ap->lock, flags); 533 534 dev = ata_scsi_find_dev(ap, sdev); 535 if (dev && dev->n_sectors < dev->n_native_sectors) { 536 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 537 dev->link->eh_info.action |= ATA_EH_RESET; 538 ata_port_schedule_eh(ap); 539 } 540 541 spin_unlock_irqrestore(ap->lock, flags); 542 ata_port_wait_eh(ap); 543 } 544 545 /** 546 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 547 * @ap: target port 548 * @sdev: SCSI device to get identify data for 549 * @arg: User buffer area for identify data 550 * 551 * LOCKING: 552 * Defined by the SCSI layer. We don't really care. 553 * 554 * RETURNS: 555 * Zero on success, negative errno on error. 556 */ 557 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 558 void __user *arg) 559 { 560 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 561 u16 __user *dst = arg; 562 char buf[40]; 563 564 if (!dev) 565 return -ENOMSG; 566 567 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 568 return -EFAULT; 569 570 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 571 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 572 return -EFAULT; 573 574 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 575 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 576 return -EFAULT; 577 578 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 579 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 580 return -EFAULT; 581 582 return 0; 583 } 584 585 /** 586 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 587 * @scsidev: Device to which we are issuing command 588 * @arg: User provided data for issuing command 589 * 590 * LOCKING: 591 * Defined by the SCSI layer. We don't really care. 592 * 593 * RETURNS: 594 * Zero on success, negative errno on error. 595 */ 596 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 597 { 598 int rc = 0; 599 u8 scsi_cmd[MAX_COMMAND_SIZE]; 600 u8 args[4], *argbuf = NULL, *sensebuf = NULL; 601 int argsize = 0; 602 enum dma_data_direction data_dir; 603 struct scsi_sense_hdr sshdr; 604 int cmd_result; 605 606 if (arg == NULL) 607 return -EINVAL; 608 609 if (copy_from_user(args, arg, sizeof(args))) 610 return -EFAULT; 611 612 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 613 if (!sensebuf) 614 return -ENOMEM; 615 616 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 617 618 if (args[3]) { 619 argsize = ATA_SECT_SIZE * args[3]; 620 argbuf = kmalloc(argsize, GFP_KERNEL); 621 if (argbuf == NULL) { 622 rc = -ENOMEM; 623 goto error; 624 } 625 626 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 627 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 628 block count in sector count field */ 629 data_dir = DMA_FROM_DEVICE; 630 } else { 631 scsi_cmd[1] = (3 << 1); /* Non-data */ 632 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 633 data_dir = DMA_NONE; 634 } 635 636 scsi_cmd[0] = ATA_16; 637 638 scsi_cmd[4] = args[2]; 639 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 640 scsi_cmd[6] = args[3]; 641 scsi_cmd[8] = args[1]; 642 scsi_cmd[10] = 0x4f; 643 scsi_cmd[12] = 0xc2; 644 } else { 645 scsi_cmd[6] = args[1]; 646 } 647 scsi_cmd[14] = args[0]; 648 649 /* Good values for timeout and retries? Values below 650 from scsi_ioctl_send_command() for default case... */ 651 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 652 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 653 654 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 655 u8 *desc = sensebuf + 8; 656 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 657 658 /* If we set cc then ATA pass-through will cause a 659 * check condition even if no error. Filter that. */ 660 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 661 if (sshdr.sense_key == RECOVERED_ERROR && 662 sshdr.asc == 0 && sshdr.ascq == 0x1d) 663 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 664 } 665 666 /* Send userspace a few ATA registers (same as drivers/ide) */ 667 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 668 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 669 args[0] = desc[13]; /* status */ 670 args[1] = desc[3]; /* error */ 671 args[2] = desc[5]; /* sector count (0:7) */ 672 if (copy_to_user(arg, args, sizeof(args))) 673 rc = -EFAULT; 674 } 675 } 676 677 678 if (cmd_result) { 679 rc = -EIO; 680 goto error; 681 } 682 683 if ((argbuf) 684 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 685 rc = -EFAULT; 686 error: 687 kfree(sensebuf); 688 kfree(argbuf); 689 return rc; 690 } 691 692 /** 693 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 694 * @scsidev: Device to which we are issuing command 695 * @arg: User provided data for issuing command 696 * 697 * LOCKING: 698 * Defined by the SCSI layer. We don't really care. 699 * 700 * RETURNS: 701 * Zero on success, negative errno on error. 702 */ 703 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 704 { 705 int rc = 0; 706 u8 scsi_cmd[MAX_COMMAND_SIZE]; 707 u8 args[7], *sensebuf = NULL; 708 struct scsi_sense_hdr sshdr; 709 int cmd_result; 710 711 if (arg == NULL) 712 return -EINVAL; 713 714 if (copy_from_user(args, arg, sizeof(args))) 715 return -EFAULT; 716 717 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 718 if (!sensebuf) 719 return -ENOMEM; 720 721 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 722 scsi_cmd[0] = ATA_16; 723 scsi_cmd[1] = (3 << 1); /* Non-data */ 724 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 725 scsi_cmd[4] = args[1]; 726 scsi_cmd[6] = args[2]; 727 scsi_cmd[8] = args[3]; 728 scsi_cmd[10] = args[4]; 729 scsi_cmd[12] = args[5]; 730 scsi_cmd[13] = args[6] & 0x4f; 731 scsi_cmd[14] = args[0]; 732 733 /* Good values for timeout and retries? Values below 734 from scsi_ioctl_send_command() for default case... */ 735 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 736 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); 737 738 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 739 u8 *desc = sensebuf + 8; 740 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 741 742 /* If we set cc then ATA pass-through will cause a 743 * check condition even if no error. Filter that. */ 744 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 745 if (sshdr.sense_key == RECOVERED_ERROR && 746 sshdr.asc == 0 && sshdr.ascq == 0x1d) 747 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 748 } 749 750 /* Send userspace ATA registers */ 751 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 752 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 753 args[0] = desc[13]; /* status */ 754 args[1] = desc[3]; /* error */ 755 args[2] = desc[5]; /* sector count (0:7) */ 756 args[3] = desc[7]; /* lbal */ 757 args[4] = desc[9]; /* lbam */ 758 args[5] = desc[11]; /* lbah */ 759 args[6] = desc[12]; /* select */ 760 if (copy_to_user(arg, args, sizeof(args))) 761 rc = -EFAULT; 762 } 763 } 764 765 if (cmd_result) { 766 rc = -EIO; 767 goto error; 768 } 769 770 error: 771 kfree(sensebuf); 772 return rc; 773 } 774 775 static int ata_ioc32(struct ata_port *ap) 776 { 777 if (ap->flags & ATA_FLAG_PIO_DMA) 778 return 1; 779 if (ap->pflags & ATA_PFLAG_PIO32) 780 return 1; 781 return 0; 782 } 783 784 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 785 int cmd, void __user *arg) 786 { 787 unsigned long val; 788 int rc = -EINVAL; 789 unsigned long flags; 790 791 switch (cmd) { 792 case HDIO_GET_32BIT: 793 spin_lock_irqsave(ap->lock, flags); 794 val = ata_ioc32(ap); 795 spin_unlock_irqrestore(ap->lock, flags); 796 return put_user(val, (unsigned long __user *)arg); 797 798 case HDIO_SET_32BIT: 799 val = (unsigned long) arg; 800 rc = 0; 801 spin_lock_irqsave(ap->lock, flags); 802 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 803 if (val) 804 ap->pflags |= ATA_PFLAG_PIO32; 805 else 806 ap->pflags &= ~ATA_PFLAG_PIO32; 807 } else { 808 if (val != ata_ioc32(ap)) 809 rc = -EINVAL; 810 } 811 spin_unlock_irqrestore(ap->lock, flags); 812 return rc; 813 814 case HDIO_GET_IDENTITY: 815 return ata_get_identity(ap, scsidev, arg); 816 817 case HDIO_DRIVE_CMD: 818 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 819 return -EACCES; 820 return ata_cmd_ioctl(scsidev, arg); 821 822 case HDIO_DRIVE_TASK: 823 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 824 return -EACCES; 825 return ata_task_ioctl(scsidev, arg); 826 827 default: 828 rc = -ENOTTY; 829 break; 830 } 831 832 return rc; 833 } 834 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 835 836 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) 837 { 838 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 839 scsidev, cmd, arg); 840 } 841 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 842 843 /** 844 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 845 * @dev: ATA device to which the new command is attached 846 * @cmd: SCSI command that originated this ATA command 847 * 848 * Obtain a reference to an unused ata_queued_cmd structure, 849 * which is the basic libata structure representing a single 850 * ATA command sent to the hardware. 851 * 852 * If a command was available, fill in the SCSI-specific 853 * portions of the structure with information on the 854 * current command. 855 * 856 * LOCKING: 857 * spin_lock_irqsave(host lock) 858 * 859 * RETURNS: 860 * Command allocated, or %NULL if none available. 861 */ 862 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 863 struct scsi_cmnd *cmd) 864 { 865 struct ata_queued_cmd *qc; 866 867 qc = ata_qc_new_init(dev, cmd->request->tag); 868 if (qc) { 869 qc->scsicmd = cmd; 870 qc->scsidone = cmd->scsi_done; 871 872 qc->sg = scsi_sglist(cmd); 873 qc->n_elem = scsi_sg_count(cmd); 874 } else { 875 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 876 cmd->scsi_done(cmd); 877 } 878 879 return qc; 880 } 881 882 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 883 { 884 struct scsi_cmnd *scmd = qc->scsicmd; 885 886 qc->extrabytes = scmd->request->extra_len; 887 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 888 } 889 890 /** 891 * ata_dump_status - user friendly display of error info 892 * @id: id of the port in question 893 * @tf: ptr to filled out taskfile 894 * 895 * Decode and dump the ATA error/status registers for the user so 896 * that they have some idea what really happened at the non 897 * make-believe layer. 898 * 899 * LOCKING: 900 * inherited from caller 901 */ 902 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 903 { 904 u8 stat = tf->command, err = tf->feature; 905 906 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); 907 if (stat & ATA_BUSY) { 908 printk("Busy }\n"); /* Data is not valid in this case */ 909 } else { 910 if (stat & ATA_DRDY) printk("DriveReady "); 911 if (stat & ATA_DF) printk("DeviceFault "); 912 if (stat & ATA_DSC) printk("SeekComplete "); 913 if (stat & ATA_DRQ) printk("DataRequest "); 914 if (stat & ATA_CORR) printk("CorrectedError "); 915 if (stat & ATA_SENSE) printk("Sense "); 916 if (stat & ATA_ERR) printk("Error "); 917 printk("}\n"); 918 919 if (err) { 920 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); 921 if (err & ATA_ABORTED) printk("DriveStatusError "); 922 if (err & ATA_ICRC) { 923 if (err & ATA_ABORTED) 924 printk("BadCRC "); 925 else printk("Sector "); 926 } 927 if (err & ATA_UNC) printk("UncorrectableError "); 928 if (err & ATA_IDNF) printk("SectorIdNotFound "); 929 if (err & ATA_TRK0NF) printk("TrackZeroNotFound "); 930 if (err & ATA_AMNF) printk("AddrMarkNotFound "); 931 printk("}\n"); 932 } 933 } 934 } 935 936 /** 937 * ata_to_sense_error - convert ATA error to SCSI error 938 * @id: ATA device number 939 * @drv_stat: value contained in ATA status register 940 * @drv_err: value contained in ATA error register 941 * @sk: the sense key we'll fill out 942 * @asc: the additional sense code we'll fill out 943 * @ascq: the additional sense code qualifier we'll fill out 944 * @verbose: be verbose 945 * 946 * Converts an ATA error into a SCSI error. Fill out pointers to 947 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 948 * format sense blocks. 949 * 950 * LOCKING: 951 * spin_lock_irqsave(host lock) 952 */ 953 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 954 u8 *asc, u8 *ascq, int verbose) 955 { 956 int i; 957 958 /* Based on the 3ware driver translation table */ 959 static const unsigned char sense_table[][4] = { 960 /* BBD|ECC|ID|MAR */ 961 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 962 // Device busy Aborted command 963 /* BBD|ECC|ID */ 964 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 965 // Device busy Aborted command 966 /* ECC|MC|MARK */ 967 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 968 // Device fault Hardware error 969 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 970 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 971 // Data CRC error SCSI parity error 972 /* MC|ID|ABRT|TRK0|MARK */ 973 {0x37, NOT_READY, 0x04, 0x00}, 974 // Unit offline Not ready 975 /* MCR|MARK */ 976 {0x09, NOT_READY, 0x04, 0x00}, 977 // Unrecovered disk error Not ready 978 /* Bad address mark */ 979 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 980 // Address mark not found for data field 981 /* TRK0 - Track 0 not found */ 982 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 983 // Hardware error 984 /* Abort: 0x04 is not translated here, see below */ 985 /* Media change request */ 986 {0x08, NOT_READY, 0x04, 0x00}, 987 // FIXME: faking offline 988 /* SRV/IDNF - ID not found */ 989 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 990 // Logical address out of range 991 /* MC - Media Changed */ 992 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 993 // Not ready to ready change, medium may have changed 994 /* ECC - Uncorrectable ECC error */ 995 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 996 // Unrecovered read error 997 /* BBD - block marked bad */ 998 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 999 // Block marked bad Medium error, unrecovered read error 1000 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 1001 }; 1002 static const unsigned char stat_table[][4] = { 1003 /* Must be first because BUSY means no other bits valid */ 1004 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 1005 // Busy, fake parity for now 1006 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 1007 // Device ready, unaligned write command 1008 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 1009 // Device fault, internal target failure 1010 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 1011 // Timed out in xfer, fake parity for now 1012 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 1013 // Recovered ECC error Medium error, recovered 1014 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 1015 }; 1016 1017 /* 1018 * Is this an error we can process/parse 1019 */ 1020 if (drv_stat & ATA_BUSY) { 1021 drv_err = 0; /* Ignore the err bits, they're invalid */ 1022 } 1023 1024 if (drv_err) { 1025 /* Look for drv_err */ 1026 for (i = 0; sense_table[i][0] != 0xFF; i++) { 1027 /* Look for best matches first */ 1028 if ((sense_table[i][0] & drv_err) == 1029 sense_table[i][0]) { 1030 *sk = sense_table[i][1]; 1031 *asc = sense_table[i][2]; 1032 *ascq = sense_table[i][3]; 1033 goto translate_done; 1034 } 1035 } 1036 } 1037 1038 /* 1039 * Fall back to interpreting status bits. Note that if the drv_err 1040 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 1041 * is not descriptive enough. 1042 */ 1043 for (i = 0; stat_table[i][0] != 0xFF; i++) { 1044 if (stat_table[i][0] & drv_stat) { 1045 *sk = stat_table[i][1]; 1046 *asc = stat_table[i][2]; 1047 *ascq = stat_table[i][3]; 1048 goto translate_done; 1049 } 1050 } 1051 1052 /* 1053 * We need a sensible error return here, which is tricky, and one 1054 * that won't cause people to do things like return a disk wrongly. 1055 */ 1056 *sk = ABORTED_COMMAND; 1057 *asc = 0x00; 1058 *ascq = 0x00; 1059 1060 translate_done: 1061 if (verbose) 1062 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " 1063 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 1064 id, drv_stat, drv_err, *sk, *asc, *ascq); 1065 return; 1066 } 1067 1068 /* 1069 * ata_gen_passthru_sense - Generate check condition sense block. 1070 * @qc: Command that completed. 1071 * 1072 * This function is specific to the ATA descriptor format sense 1073 * block specified for the ATA pass through commands. Regardless 1074 * of whether the command errored or not, return a sense 1075 * block. Copy all controller registers into the sense 1076 * block. If there was no error, we get the request from an ATA 1077 * passthrough command, so we use the following sense data: 1078 * sk = RECOVERED ERROR 1079 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1080 * 1081 * 1082 * LOCKING: 1083 * None. 1084 */ 1085 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 1086 { 1087 struct scsi_cmnd *cmd = qc->scsicmd; 1088 struct ata_taskfile *tf = &qc->result_tf; 1089 unsigned char *sb = cmd->sense_buffer; 1090 unsigned char *desc = sb + 8; 1091 int verbose = qc->ap->ops->error_handler == NULL; 1092 u8 sense_key, asc, ascq; 1093 1094 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1095 1096 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1097 1098 /* 1099 * Use ata_to_sense_error() to map status register bits 1100 * onto sense key, asc & ascq. 1101 */ 1102 if (qc->err_mask || 1103 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1104 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1105 &sense_key, &asc, &ascq, verbose); 1106 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 1107 } else { 1108 /* 1109 * ATA PASS-THROUGH INFORMATION AVAILABLE 1110 * Always in descriptor format sense. 1111 */ 1112 scsi_build_sense_buffer(1, cmd->sense_buffer, 1113 RECOVERED_ERROR, 0, 0x1D); 1114 } 1115 1116 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 1117 u8 len; 1118 1119 /* descriptor format */ 1120 len = sb[7]; 1121 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 1122 if (!desc) { 1123 if (SCSI_SENSE_BUFFERSIZE < len + 14) 1124 return; 1125 sb[7] = len + 14; 1126 desc = sb + 8 + len; 1127 } 1128 desc[0] = 9; 1129 desc[1] = 12; 1130 /* 1131 * Copy registers into sense buffer. 1132 */ 1133 desc[2] = 0x00; 1134 desc[3] = tf->feature; /* == error reg */ 1135 desc[5] = tf->nsect; 1136 desc[7] = tf->lbal; 1137 desc[9] = tf->lbam; 1138 desc[11] = tf->lbah; 1139 desc[12] = tf->device; 1140 desc[13] = tf->command; /* == status reg */ 1141 1142 /* 1143 * Fill in Extend bit, and the high order bytes 1144 * if applicable. 1145 */ 1146 if (tf->flags & ATA_TFLAG_LBA48) { 1147 desc[2] |= 0x01; 1148 desc[4] = tf->hob_nsect; 1149 desc[6] = tf->hob_lbal; 1150 desc[8] = tf->hob_lbam; 1151 desc[10] = tf->hob_lbah; 1152 } 1153 } else { 1154 /* Fixed sense format */ 1155 desc[0] = tf->feature; 1156 desc[1] = tf->command; /* status */ 1157 desc[2] = tf->device; 1158 desc[3] = tf->nsect; 1159 desc[7] = 0; 1160 if (tf->flags & ATA_TFLAG_LBA48) { 1161 desc[8] |= 0x80; 1162 if (tf->hob_nsect) 1163 desc[8] |= 0x40; 1164 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 1165 desc[8] |= 0x20; 1166 } 1167 desc[9] = tf->lbal; 1168 desc[10] = tf->lbam; 1169 desc[11] = tf->lbah; 1170 } 1171 } 1172 1173 /** 1174 * ata_gen_ata_sense - generate a SCSI fixed sense block 1175 * @qc: Command that we are erroring out 1176 * 1177 * Generate sense block for a failed ATA command @qc. Descriptor 1178 * format is used to accommodate LBA48 block address. 1179 * 1180 * LOCKING: 1181 * None. 1182 */ 1183 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 1184 { 1185 struct ata_device *dev = qc->dev; 1186 struct scsi_cmnd *cmd = qc->scsicmd; 1187 struct ata_taskfile *tf = &qc->result_tf; 1188 unsigned char *sb = cmd->sense_buffer; 1189 int verbose = qc->ap->ops->error_handler == NULL; 1190 u64 block; 1191 u8 sense_key, asc, ascq; 1192 1193 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1194 1195 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1196 1197 if (ata_dev_disabled(dev)) { 1198 /* Device disabled after error recovery */ 1199 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 1200 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 1201 return; 1202 } 1203 /* Use ata_to_sense_error() to map status register bits 1204 * onto sense key, asc & ascq. 1205 */ 1206 if (qc->err_mask || 1207 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1208 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1209 &sense_key, &asc, &ascq, verbose); 1210 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1211 } else { 1212 /* Could not decode error */ 1213 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1214 tf->command, qc->err_mask); 1215 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1216 return; 1217 } 1218 1219 block = ata_tf_read_block(&qc->result_tf, dev); 1220 if (block == U64_MAX) 1221 return; 1222 1223 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1224 } 1225 1226 static void ata_scsi_sdev_config(struct scsi_device *sdev) 1227 { 1228 sdev->use_10_for_rw = 1; 1229 sdev->use_10_for_ms = 1; 1230 sdev->no_write_same = 1; 1231 1232 /* Schedule policy is determined by ->qc_defer() callback and 1233 * it needs to see every deferred qc. Set dev_blocked to 1 to 1234 * prevent SCSI midlayer from automatically deferring 1235 * requests. 1236 */ 1237 sdev->max_device_blocked = 1; 1238 } 1239 1240 /** 1241 * atapi_drain_needed - Check whether data transfer may overflow 1242 * @rq: request to be checked 1243 * 1244 * ATAPI commands which transfer variable length data to host 1245 * might overflow due to application error or hardware bug. This 1246 * function checks whether overflow should be drained and ignored 1247 * for @request. 1248 * 1249 * LOCKING: 1250 * None. 1251 * 1252 * RETURNS: 1253 * 1 if ; otherwise, 0. 1254 */ 1255 static int atapi_drain_needed(struct request *rq) 1256 { 1257 if (likely(!blk_rq_is_passthrough(rq))) 1258 return 0; 1259 1260 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq))) 1261 return 0; 1262 1263 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; 1264 } 1265 1266 static int ata_scsi_dev_config(struct scsi_device *sdev, 1267 struct ata_device *dev) 1268 { 1269 struct request_queue *q = sdev->request_queue; 1270 1271 if (!ata_id_has_unload(dev->id)) 1272 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1273 1274 /* configure max sectors */ 1275 blk_queue_max_hw_sectors(q, dev->max_sectors); 1276 1277 if (dev->class == ATA_DEV_ATAPI) { 1278 void *buf; 1279 1280 sdev->sector_size = ATA_SECT_SIZE; 1281 1282 /* set DMA padding */ 1283 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1284 1285 /* configure draining */ 1286 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1287 if (!buf) { 1288 ata_dev_err(dev, "drain buffer allocation failed\n"); 1289 return -ENOMEM; 1290 } 1291 1292 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1293 } else { 1294 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1295 sdev->manage_start_stop = 1; 1296 } 1297 1298 /* 1299 * ata_pio_sectors() expects buffer for each sector to not cross 1300 * page boundary. Enforce it by requiring buffers to be sector 1301 * aligned, which works iff sector_size is not larger than 1302 * PAGE_SIZE. ATAPI devices also need the alignment as 1303 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1304 */ 1305 if (sdev->sector_size > PAGE_SIZE) 1306 ata_dev_warn(dev, 1307 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1308 sdev->sector_size); 1309 1310 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1311 1312 if (dev->flags & ATA_DFLAG_AN) 1313 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1314 1315 if (dev->flags & ATA_DFLAG_NCQ) { 1316 int depth; 1317 1318 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1319 depth = min(ATA_MAX_QUEUE - 1, depth); 1320 scsi_change_queue_depth(sdev, depth); 1321 } 1322 1323 blk_queue_flush_queueable(q, false); 1324 1325 dev->sdev = sdev; 1326 return 0; 1327 } 1328 1329 /** 1330 * ata_scsi_slave_config - Set SCSI device attributes 1331 * @sdev: SCSI device to examine 1332 * 1333 * This is called before we actually start reading 1334 * and writing to the device, to configure certain 1335 * SCSI mid-layer behaviors. 1336 * 1337 * LOCKING: 1338 * Defined by SCSI layer. We don't really care. 1339 */ 1340 1341 int ata_scsi_slave_config(struct scsi_device *sdev) 1342 { 1343 struct ata_port *ap = ata_shost_to_port(sdev->host); 1344 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1345 int rc = 0; 1346 1347 ata_scsi_sdev_config(sdev); 1348 1349 if (dev) 1350 rc = ata_scsi_dev_config(sdev, dev); 1351 1352 return rc; 1353 } 1354 1355 /** 1356 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1357 * @sdev: SCSI device to be destroyed 1358 * 1359 * @sdev is about to be destroyed for hot/warm unplugging. If 1360 * this unplugging was initiated by libata as indicated by NULL 1361 * dev->sdev, this function doesn't have to do anything. 1362 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1363 * Clear dev->sdev, schedule the device for ATA detach and invoke 1364 * EH. 1365 * 1366 * LOCKING: 1367 * Defined by SCSI layer. We don't really care. 1368 */ 1369 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1370 { 1371 struct ata_port *ap = ata_shost_to_port(sdev->host); 1372 struct request_queue *q = sdev->request_queue; 1373 unsigned long flags; 1374 struct ata_device *dev; 1375 1376 if (!ap->ops->error_handler) 1377 return; 1378 1379 spin_lock_irqsave(ap->lock, flags); 1380 dev = __ata_scsi_find_dev(ap, sdev); 1381 if (dev && dev->sdev) { 1382 /* SCSI device already in CANCEL state, no need to offline it */ 1383 dev->sdev = NULL; 1384 dev->flags |= ATA_DFLAG_DETACH; 1385 ata_port_schedule_eh(ap); 1386 } 1387 spin_unlock_irqrestore(ap->lock, flags); 1388 1389 kfree(q->dma_drain_buffer); 1390 q->dma_drain_buffer = NULL; 1391 q->dma_drain_size = 0; 1392 } 1393 1394 /** 1395 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth 1396 * @ap: ATA port to which the device change the queue depth 1397 * @sdev: SCSI device to configure queue depth for 1398 * @queue_depth: new queue depth 1399 * 1400 * libsas and libata have different approaches for associating a sdev to 1401 * its ata_port. 1402 * 1403 */ 1404 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1405 int queue_depth) 1406 { 1407 struct ata_device *dev; 1408 unsigned long flags; 1409 1410 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1411 return sdev->queue_depth; 1412 1413 dev = ata_scsi_find_dev(ap, sdev); 1414 if (!dev || !ata_dev_enabled(dev)) 1415 return sdev->queue_depth; 1416 1417 /* NCQ enabled? */ 1418 spin_lock_irqsave(ap->lock, flags); 1419 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1420 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1421 dev->flags |= ATA_DFLAG_NCQ_OFF; 1422 queue_depth = 1; 1423 } 1424 spin_unlock_irqrestore(ap->lock, flags); 1425 1426 /* limit and apply queue depth */ 1427 queue_depth = min(queue_depth, sdev->host->can_queue); 1428 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1429 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); 1430 1431 if (sdev->queue_depth == queue_depth) 1432 return -EINVAL; 1433 1434 return scsi_change_queue_depth(sdev, queue_depth); 1435 } 1436 1437 /** 1438 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1439 * @sdev: SCSI device to configure queue depth for 1440 * @queue_depth: new queue depth 1441 * 1442 * This is libata standard hostt->change_queue_depth callback. 1443 * SCSI will call into this callback when user tries to set queue 1444 * depth via sysfs. 1445 * 1446 * LOCKING: 1447 * SCSI layer (we don't care) 1448 * 1449 * RETURNS: 1450 * Newly configured queue depth. 1451 */ 1452 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) 1453 { 1454 struct ata_port *ap = ata_shost_to_port(sdev->host); 1455 1456 return __ata_change_queue_depth(ap, sdev, queue_depth); 1457 } 1458 1459 /** 1460 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1461 * @qc: Storage for translated ATA taskfile 1462 * 1463 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1464 * (to start). Perhaps these commands should be preceded by 1465 * CHECK POWER MODE to see what power mode the device is already in. 1466 * [See SAT revision 5 at www.t10.org] 1467 * 1468 * LOCKING: 1469 * spin_lock_irqsave(host lock) 1470 * 1471 * RETURNS: 1472 * Zero on success, non-zero on error. 1473 */ 1474 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1475 { 1476 struct scsi_cmnd *scmd = qc->scsicmd; 1477 struct ata_taskfile *tf = &qc->tf; 1478 const u8 *cdb = scmd->cmnd; 1479 u16 fp; 1480 u8 bp = 0xff; 1481 1482 if (scmd->cmd_len < 5) { 1483 fp = 4; 1484 goto invalid_fld; 1485 } 1486 1487 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1488 tf->protocol = ATA_PROT_NODATA; 1489 if (cdb[1] & 0x1) { 1490 ; /* ignore IMMED bit, violates sat-r05 */ 1491 } 1492 if (cdb[4] & 0x2) { 1493 fp = 4; 1494 bp = 1; 1495 goto invalid_fld; /* LOEJ bit set not supported */ 1496 } 1497 if (((cdb[4] >> 4) & 0xf) != 0) { 1498 fp = 4; 1499 bp = 3; 1500 goto invalid_fld; /* power conditions not supported */ 1501 } 1502 1503 if (cdb[4] & 0x1) { 1504 tf->nsect = 1; /* 1 sector, lba=0 */ 1505 1506 if (qc->dev->flags & ATA_DFLAG_LBA) { 1507 tf->flags |= ATA_TFLAG_LBA; 1508 1509 tf->lbah = 0x0; 1510 tf->lbam = 0x0; 1511 tf->lbal = 0x0; 1512 tf->device |= ATA_LBA; 1513 } else { 1514 /* CHS */ 1515 tf->lbal = 0x1; /* sect */ 1516 tf->lbam = 0x0; /* cyl low */ 1517 tf->lbah = 0x0; /* cyl high */ 1518 } 1519 1520 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1521 } else { 1522 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1523 * or S5) causing some drives to spin up and down again. 1524 */ 1525 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1526 system_state == SYSTEM_POWER_OFF) 1527 goto skip; 1528 1529 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1530 system_entering_hibernation()) 1531 goto skip; 1532 1533 /* Issue ATA STANDBY IMMEDIATE command */ 1534 tf->command = ATA_CMD_STANDBYNOW1; 1535 } 1536 1537 /* 1538 * Standby and Idle condition timers could be implemented but that 1539 * would require libata to implement the Power condition mode page 1540 * and allow the user to change it. Changing mode pages requires 1541 * MODE SELECT to be implemented. 1542 */ 1543 1544 return 0; 1545 1546 invalid_fld: 1547 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1548 return 1; 1549 skip: 1550 scmd->result = SAM_STAT_GOOD; 1551 return 1; 1552 } 1553 1554 1555 /** 1556 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1557 * @qc: Storage for translated ATA taskfile 1558 * 1559 * Sets up an ATA taskfile to issue FLUSH CACHE or 1560 * FLUSH CACHE EXT. 1561 * 1562 * LOCKING: 1563 * spin_lock_irqsave(host lock) 1564 * 1565 * RETURNS: 1566 * Zero on success, non-zero on error. 1567 */ 1568 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1569 { 1570 struct ata_taskfile *tf = &qc->tf; 1571 1572 tf->flags |= ATA_TFLAG_DEVICE; 1573 tf->protocol = ATA_PROT_NODATA; 1574 1575 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1576 tf->command = ATA_CMD_FLUSH_EXT; 1577 else 1578 tf->command = ATA_CMD_FLUSH; 1579 1580 /* flush is critical for IO integrity, consider it an IO command */ 1581 qc->flags |= ATA_QCFLAG_IO; 1582 1583 return 0; 1584 } 1585 1586 /** 1587 * scsi_6_lba_len - Get LBA and transfer length 1588 * @cdb: SCSI command to translate 1589 * 1590 * Calculate LBA and transfer length for 6-byte commands. 1591 * 1592 * RETURNS: 1593 * @plba: the LBA 1594 * @plen: the transfer length 1595 */ 1596 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1597 { 1598 u64 lba = 0; 1599 u32 len; 1600 1601 VPRINTK("six-byte command\n"); 1602 1603 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1604 lba |= ((u64)cdb[2]) << 8; 1605 lba |= ((u64)cdb[3]); 1606 1607 len = cdb[4]; 1608 1609 *plba = lba; 1610 *plen = len; 1611 } 1612 1613 /** 1614 * scsi_10_lba_len - Get LBA and transfer length 1615 * @cdb: SCSI command to translate 1616 * 1617 * Calculate LBA and transfer length for 10-byte commands. 1618 * 1619 * RETURNS: 1620 * @plba: the LBA 1621 * @plen: the transfer length 1622 */ 1623 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1624 { 1625 u64 lba = 0; 1626 u32 len = 0; 1627 1628 VPRINTK("ten-byte command\n"); 1629 1630 lba |= ((u64)cdb[2]) << 24; 1631 lba |= ((u64)cdb[3]) << 16; 1632 lba |= ((u64)cdb[4]) << 8; 1633 lba |= ((u64)cdb[5]); 1634 1635 len |= ((u32)cdb[7]) << 8; 1636 len |= ((u32)cdb[8]); 1637 1638 *plba = lba; 1639 *plen = len; 1640 } 1641 1642 /** 1643 * scsi_16_lba_len - Get LBA and transfer length 1644 * @cdb: SCSI command to translate 1645 * 1646 * Calculate LBA and transfer length for 16-byte commands. 1647 * 1648 * RETURNS: 1649 * @plba: the LBA 1650 * @plen: the transfer length 1651 */ 1652 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1653 { 1654 u64 lba = 0; 1655 u32 len = 0; 1656 1657 VPRINTK("sixteen-byte command\n"); 1658 1659 lba |= ((u64)cdb[2]) << 56; 1660 lba |= ((u64)cdb[3]) << 48; 1661 lba |= ((u64)cdb[4]) << 40; 1662 lba |= ((u64)cdb[5]) << 32; 1663 lba |= ((u64)cdb[6]) << 24; 1664 lba |= ((u64)cdb[7]) << 16; 1665 lba |= ((u64)cdb[8]) << 8; 1666 lba |= ((u64)cdb[9]); 1667 1668 len |= ((u32)cdb[10]) << 24; 1669 len |= ((u32)cdb[11]) << 16; 1670 len |= ((u32)cdb[12]) << 8; 1671 len |= ((u32)cdb[13]); 1672 1673 *plba = lba; 1674 *plen = len; 1675 } 1676 1677 /** 1678 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1679 * @qc: Storage for translated ATA taskfile 1680 * 1681 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1682 * 1683 * LOCKING: 1684 * spin_lock_irqsave(host lock) 1685 * 1686 * RETURNS: 1687 * Zero on success, non-zero on error. 1688 */ 1689 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1690 { 1691 struct scsi_cmnd *scmd = qc->scsicmd; 1692 struct ata_taskfile *tf = &qc->tf; 1693 struct ata_device *dev = qc->dev; 1694 u64 dev_sectors = qc->dev->n_sectors; 1695 const u8 *cdb = scmd->cmnd; 1696 u64 block; 1697 u32 n_block; 1698 u16 fp; 1699 1700 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1701 tf->protocol = ATA_PROT_NODATA; 1702 1703 if (cdb[0] == VERIFY) { 1704 if (scmd->cmd_len < 10) { 1705 fp = 9; 1706 goto invalid_fld; 1707 } 1708 scsi_10_lba_len(cdb, &block, &n_block); 1709 } else if (cdb[0] == VERIFY_16) { 1710 if (scmd->cmd_len < 16) { 1711 fp = 15; 1712 goto invalid_fld; 1713 } 1714 scsi_16_lba_len(cdb, &block, &n_block); 1715 } else { 1716 fp = 0; 1717 goto invalid_fld; 1718 } 1719 1720 if (!n_block) 1721 goto nothing_to_do; 1722 if (block >= dev_sectors) 1723 goto out_of_range; 1724 if ((block + n_block) > dev_sectors) 1725 goto out_of_range; 1726 1727 if (dev->flags & ATA_DFLAG_LBA) { 1728 tf->flags |= ATA_TFLAG_LBA; 1729 1730 if (lba_28_ok(block, n_block)) { 1731 /* use LBA28 */ 1732 tf->command = ATA_CMD_VERIFY; 1733 tf->device |= (block >> 24) & 0xf; 1734 } else if (lba_48_ok(block, n_block)) { 1735 if (!(dev->flags & ATA_DFLAG_LBA48)) 1736 goto out_of_range; 1737 1738 /* use LBA48 */ 1739 tf->flags |= ATA_TFLAG_LBA48; 1740 tf->command = ATA_CMD_VERIFY_EXT; 1741 1742 tf->hob_nsect = (n_block >> 8) & 0xff; 1743 1744 tf->hob_lbah = (block >> 40) & 0xff; 1745 tf->hob_lbam = (block >> 32) & 0xff; 1746 tf->hob_lbal = (block >> 24) & 0xff; 1747 } else 1748 /* request too large even for LBA48 */ 1749 goto out_of_range; 1750 1751 tf->nsect = n_block & 0xff; 1752 1753 tf->lbah = (block >> 16) & 0xff; 1754 tf->lbam = (block >> 8) & 0xff; 1755 tf->lbal = block & 0xff; 1756 1757 tf->device |= ATA_LBA; 1758 } else { 1759 /* CHS */ 1760 u32 sect, head, cyl, track; 1761 1762 if (!lba_28_ok(block, n_block)) 1763 goto out_of_range; 1764 1765 /* Convert LBA to CHS */ 1766 track = (u32)block / dev->sectors; 1767 cyl = track / dev->heads; 1768 head = track % dev->heads; 1769 sect = (u32)block % dev->sectors + 1; 1770 1771 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1772 (u32)block, track, cyl, head, sect); 1773 1774 /* Check whether the converted CHS can fit. 1775 Cylinder: 0-65535 1776 Head: 0-15 1777 Sector: 1-255*/ 1778 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1779 goto out_of_range; 1780 1781 tf->command = ATA_CMD_VERIFY; 1782 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1783 tf->lbal = sect; 1784 tf->lbam = cyl; 1785 tf->lbah = cyl >> 8; 1786 tf->device |= head; 1787 } 1788 1789 return 0; 1790 1791 invalid_fld: 1792 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1793 return 1; 1794 1795 out_of_range: 1796 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1797 /* "Logical Block Address out of range" */ 1798 return 1; 1799 1800 nothing_to_do: 1801 scmd->result = SAM_STAT_GOOD; 1802 return 1; 1803 } 1804 1805 /** 1806 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1807 * @qc: Storage for translated ATA taskfile 1808 * 1809 * Converts any of six SCSI read/write commands into the 1810 * ATA counterpart, including starting sector (LBA), 1811 * sector count, and taking into account the device's LBA48 1812 * support. 1813 * 1814 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1815 * %WRITE_16 are currently supported. 1816 * 1817 * LOCKING: 1818 * spin_lock_irqsave(host lock) 1819 * 1820 * RETURNS: 1821 * Zero on success, non-zero on error. 1822 */ 1823 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1824 { 1825 struct scsi_cmnd *scmd = qc->scsicmd; 1826 const u8 *cdb = scmd->cmnd; 1827 struct request *rq = scmd->request; 1828 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); 1829 unsigned int tf_flags = 0; 1830 u64 block; 1831 u32 n_block; 1832 int rc; 1833 u16 fp = 0; 1834 1835 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1836 tf_flags |= ATA_TFLAG_WRITE; 1837 1838 /* Calculate the SCSI LBA, transfer length and FUA. */ 1839 switch (cdb[0]) { 1840 case READ_10: 1841 case WRITE_10: 1842 if (unlikely(scmd->cmd_len < 10)) { 1843 fp = 9; 1844 goto invalid_fld; 1845 } 1846 scsi_10_lba_len(cdb, &block, &n_block); 1847 if (cdb[1] & (1 << 3)) 1848 tf_flags |= ATA_TFLAG_FUA; 1849 break; 1850 case READ_6: 1851 case WRITE_6: 1852 if (unlikely(scmd->cmd_len < 6)) { 1853 fp = 5; 1854 goto invalid_fld; 1855 } 1856 scsi_6_lba_len(cdb, &block, &n_block); 1857 1858 /* for 6-byte r/w commands, transfer length 0 1859 * means 256 blocks of data, not 0 block. 1860 */ 1861 if (!n_block) 1862 n_block = 256; 1863 break; 1864 case READ_16: 1865 case WRITE_16: 1866 if (unlikely(scmd->cmd_len < 16)) { 1867 fp = 15; 1868 goto invalid_fld; 1869 } 1870 scsi_16_lba_len(cdb, &block, &n_block); 1871 if (cdb[1] & (1 << 3)) 1872 tf_flags |= ATA_TFLAG_FUA; 1873 break; 1874 default: 1875 DPRINTK("no-byte command\n"); 1876 fp = 0; 1877 goto invalid_fld; 1878 } 1879 1880 /* Check and compose ATA command */ 1881 if (!n_block) 1882 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1883 * length 0 means transfer 0 block of data. 1884 * However, for ATA R/W commands, sector count 0 means 1885 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1886 * 1887 * WARNING: one or two older ATA drives treat 0 as 0... 1888 */ 1889 goto nothing_to_do; 1890 1891 qc->flags |= ATA_QCFLAG_IO; 1892 qc->nbytes = n_block * scmd->device->sector_size; 1893 1894 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1895 qc->tag, class); 1896 1897 if (likely(rc == 0)) 1898 return 0; 1899 1900 if (rc == -ERANGE) 1901 goto out_of_range; 1902 /* treat all other errors as -EINVAL, fall through */ 1903 invalid_fld: 1904 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1905 return 1; 1906 1907 out_of_range: 1908 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1909 /* "Logical Block Address out of range" */ 1910 return 1; 1911 1912 nothing_to_do: 1913 scmd->result = SAM_STAT_GOOD; 1914 return 1; 1915 } 1916 1917 static void ata_qc_done(struct ata_queued_cmd *qc) 1918 { 1919 struct scsi_cmnd *cmd = qc->scsicmd; 1920 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1921 1922 ata_qc_free(qc); 1923 done(cmd); 1924 } 1925 1926 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1927 { 1928 struct ata_port *ap = qc->ap; 1929 struct scsi_cmnd *cmd = qc->scsicmd; 1930 u8 *cdb = cmd->cmnd; 1931 int need_sense = (qc->err_mask != 0); 1932 1933 /* For ATA pass thru (SAT) commands, generate a sense block if 1934 * user mandated it or if there's an error. Note that if we 1935 * generate because the user forced us to [CK_COND =1], a check 1936 * condition is generated and the ATA register values are returned 1937 * whether the command completed successfully or not. If there 1938 * was no error, we use the following sense data: 1939 * sk = RECOVERED ERROR 1940 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1941 */ 1942 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1943 ((cdb[2] & 0x20) || need_sense)) 1944 ata_gen_passthru_sense(qc); 1945 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1946 cmd->result = SAM_STAT_CHECK_CONDITION; 1947 else if (need_sense) 1948 ata_gen_ata_sense(qc); 1949 else 1950 cmd->result = SAM_STAT_GOOD; 1951 1952 if (need_sense && !ap->ops->error_handler) 1953 ata_dump_status(ap->print_id, &qc->result_tf); 1954 1955 ata_qc_done(qc); 1956 } 1957 1958 /** 1959 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1960 * @dev: ATA device to which the command is addressed 1961 * @cmd: SCSI command to execute 1962 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1963 * 1964 * Our ->queuecommand() function has decided that the SCSI 1965 * command issued can be directly translated into an ATA 1966 * command, rather than handled internally. 1967 * 1968 * This function sets up an ata_queued_cmd structure for the 1969 * SCSI command, and sends that ata_queued_cmd to the hardware. 1970 * 1971 * The xlat_func argument (actor) returns 0 if ready to execute 1972 * ATA command, else 1 to finish translation. If 1 is returned 1973 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1974 * to be set reflecting an error condition or clean (early) 1975 * termination. 1976 * 1977 * LOCKING: 1978 * spin_lock_irqsave(host lock) 1979 * 1980 * RETURNS: 1981 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1982 * needs to be deferred. 1983 */ 1984 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1985 ata_xlat_func_t xlat_func) 1986 { 1987 struct ata_port *ap = dev->link->ap; 1988 struct ata_queued_cmd *qc; 1989 int rc; 1990 1991 VPRINTK("ENTER\n"); 1992 1993 qc = ata_scsi_qc_new(dev, cmd); 1994 if (!qc) 1995 goto err_mem; 1996 1997 /* data is present; dma-map it */ 1998 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1999 cmd->sc_data_direction == DMA_TO_DEVICE) { 2000 if (unlikely(scsi_bufflen(cmd) < 1)) { 2001 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 2002 goto err_did; 2003 } 2004 2005 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 2006 2007 qc->dma_dir = cmd->sc_data_direction; 2008 } 2009 2010 qc->complete_fn = ata_scsi_qc_complete; 2011 2012 if (xlat_func(qc)) 2013 goto early_finish; 2014 2015 if (ap->ops->qc_defer) { 2016 if ((rc = ap->ops->qc_defer(qc))) 2017 goto defer; 2018 } 2019 2020 /* select device, send command to hardware */ 2021 ata_qc_issue(qc); 2022 2023 VPRINTK("EXIT\n"); 2024 return 0; 2025 2026 early_finish: 2027 ata_qc_free(qc); 2028 cmd->scsi_done(cmd); 2029 DPRINTK("EXIT - early finish (good or error)\n"); 2030 return 0; 2031 2032 err_did: 2033 ata_qc_free(qc); 2034 cmd->result = (DID_ERROR << 16); 2035 cmd->scsi_done(cmd); 2036 err_mem: 2037 DPRINTK("EXIT - internal\n"); 2038 return 0; 2039 2040 defer: 2041 ata_qc_free(qc); 2042 DPRINTK("EXIT - defer\n"); 2043 if (rc == ATA_DEFER_LINK) 2044 return SCSI_MLQUEUE_DEVICE_BUSY; 2045 else 2046 return SCSI_MLQUEUE_HOST_BUSY; 2047 } 2048 2049 struct ata_scsi_args { 2050 struct ata_device *dev; 2051 u16 *id; 2052 struct scsi_cmnd *cmd; 2053 }; 2054 2055 /** 2056 * ata_scsi_rbuf_get - Map response buffer. 2057 * @cmd: SCSI command containing buffer to be mapped. 2058 * @flags: unsigned long variable to store irq enable status 2059 * @copy_in: copy in from user buffer 2060 * 2061 * Prepare buffer for simulated SCSI commands. 2062 * 2063 * LOCKING: 2064 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 2065 * 2066 * RETURNS: 2067 * Pointer to response buffer. 2068 */ 2069 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 2070 unsigned long *flags) 2071 { 2072 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 2073 2074 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 2075 if (copy_in) 2076 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2077 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2078 return ata_scsi_rbuf; 2079 } 2080 2081 /** 2082 * ata_scsi_rbuf_put - Unmap response buffer. 2083 * @cmd: SCSI command containing buffer to be unmapped. 2084 * @copy_out: copy out result 2085 * @flags: @flags passed to ata_scsi_rbuf_get() 2086 * 2087 * Returns rbuf buffer. The result is copied to @cmd's buffer if 2088 * @copy_back is true. 2089 * 2090 * LOCKING: 2091 * Unlocks ata_scsi_rbuf_lock. 2092 */ 2093 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 2094 unsigned long *flags) 2095 { 2096 if (copy_out) 2097 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2098 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2099 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 2100 } 2101 2102 /** 2103 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 2104 * @args: device IDENTIFY data / SCSI command of interest. 2105 * @actor: Callback hook for desired SCSI command simulator 2106 * 2107 * Takes care of the hard work of simulating a SCSI command... 2108 * Mapping the response buffer, calling the command's handler, 2109 * and handling the handler's return value. This return value 2110 * indicates whether the handler wishes the SCSI command to be 2111 * completed successfully (0), or not (in which case cmd->result 2112 * and sense buffer are assumed to be set). 2113 * 2114 * LOCKING: 2115 * spin_lock_irqsave(host lock) 2116 */ 2117 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 2118 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 2119 { 2120 u8 *rbuf; 2121 unsigned int rc; 2122 struct scsi_cmnd *cmd = args->cmd; 2123 unsigned long flags; 2124 2125 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 2126 rc = actor(args, rbuf); 2127 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 2128 2129 if (rc == 0) 2130 cmd->result = SAM_STAT_GOOD; 2131 } 2132 2133 /** 2134 * ata_scsiop_inq_std - Simulate INQUIRY command 2135 * @args: device IDENTIFY data / SCSI command of interest. 2136 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2137 * 2138 * Returns standard device identification data associated 2139 * with non-VPD INQUIRY command output. 2140 * 2141 * LOCKING: 2142 * spin_lock_irqsave(host lock) 2143 */ 2144 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 2145 { 2146 const u8 versions[] = { 2147 0x00, 2148 0x60, /* SAM-3 (no version claimed) */ 2149 2150 0x03, 2151 0x20, /* SBC-2 (no version claimed) */ 2152 2153 0x03, 2154 0x00 /* SPC-3 (no version claimed) */ 2155 }; 2156 const u8 versions_zbc[] = { 2157 0x00, 2158 0xA0, /* SAM-5 (no version claimed) */ 2159 2160 0x06, 2161 0x00, /* SBC-4 (no version claimed) */ 2162 2163 0x05, 2164 0xC0, /* SPC-5 (no version claimed) */ 2165 2166 0x60, 2167 0x24, /* ZBC r05 */ 2168 }; 2169 2170 u8 hdr[] = { 2171 TYPE_DISK, 2172 0, 2173 0x5, /* claim SPC-3 version compatibility */ 2174 2, 2175 95 - 4, 2176 0, 2177 0, 2178 2 2179 }; 2180 2181 VPRINTK("ENTER\n"); 2182 2183 /* set scsi removable (RMB) bit per ata bit, or if the 2184 * AHCI port says it's external (Hotplug-capable, eSATA). 2185 */ 2186 if (ata_id_removable(args->id) || 2187 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 2188 hdr[1] |= (1 << 7); 2189 2190 if (args->dev->class == ATA_DEV_ZAC) { 2191 hdr[0] = TYPE_ZBC; 2192 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 2193 } 2194 2195 memcpy(rbuf, hdr, sizeof(hdr)); 2196 memcpy(&rbuf[8], "ATA ", 8); 2197 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 2198 2199 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2200 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2201 if (strncmp(&rbuf[32], " ", 4) == 0) 2202 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2203 2204 if (rbuf[32] == 0 || rbuf[32] == ' ') 2205 memcpy(&rbuf[32], "n/a ", 4); 2206 2207 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 2208 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2209 else 2210 memcpy(rbuf + 58, versions, sizeof(versions)); 2211 2212 return 0; 2213 } 2214 2215 /** 2216 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2217 * @args: device IDENTIFY data / SCSI command of interest. 2218 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2219 * 2220 * Returns list of inquiry VPD pages available. 2221 * 2222 * LOCKING: 2223 * spin_lock_irqsave(host lock) 2224 */ 2225 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 2226 { 2227 int num_pages; 2228 const u8 pages[] = { 2229 0x00, /* page 0x00, this page */ 2230 0x80, /* page 0x80, unit serial no page */ 2231 0x83, /* page 0x83, device ident page */ 2232 0x89, /* page 0x89, ata info page */ 2233 0xb0, /* page 0xb0, block limits page */ 2234 0xb1, /* page 0xb1, block device characteristics page */ 2235 0xb2, /* page 0xb2, thin provisioning page */ 2236 0xb6, /* page 0xb6, zoned block device characteristics */ 2237 }; 2238 2239 num_pages = sizeof(pages); 2240 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 2241 num_pages--; 2242 rbuf[3] = num_pages; /* number of supported VPD pages */ 2243 memcpy(rbuf + 4, pages, num_pages); 2244 return 0; 2245 } 2246 2247 /** 2248 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2249 * @args: device IDENTIFY data / SCSI command of interest. 2250 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2251 * 2252 * Returns ATA device serial number. 2253 * 2254 * LOCKING: 2255 * spin_lock_irqsave(host lock) 2256 */ 2257 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2258 { 2259 const u8 hdr[] = { 2260 0, 2261 0x80, /* this page code */ 2262 0, 2263 ATA_ID_SERNO_LEN, /* page len */ 2264 }; 2265 2266 memcpy(rbuf, hdr, sizeof(hdr)); 2267 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2268 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2269 return 0; 2270 } 2271 2272 /** 2273 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2274 * @args: device IDENTIFY data / SCSI command of interest. 2275 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2276 * 2277 * Yields two logical unit device identification designators: 2278 * - vendor specific ASCII containing the ATA serial number 2279 * - SAT defined "t10 vendor id based" containing ASCII vendor 2280 * name ("ATA "), model and serial numbers. 2281 * 2282 * LOCKING: 2283 * spin_lock_irqsave(host lock) 2284 */ 2285 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2286 { 2287 const int sat_model_serial_desc_len = 68; 2288 int num; 2289 2290 rbuf[1] = 0x83; /* this page code */ 2291 num = 4; 2292 2293 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2294 rbuf[num + 0] = 2; 2295 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2296 num += 4; 2297 ata_id_string(args->id, (unsigned char *) rbuf + num, 2298 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2299 num += ATA_ID_SERNO_LEN; 2300 2301 /* SAT defined lu model and serial numbers descriptor */ 2302 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2303 rbuf[num + 0] = 2; 2304 rbuf[num + 1] = 1; 2305 rbuf[num + 3] = sat_model_serial_desc_len; 2306 num += 4; 2307 memcpy(rbuf + num, "ATA ", 8); 2308 num += 8; 2309 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2310 ATA_ID_PROD_LEN); 2311 num += ATA_ID_PROD_LEN; 2312 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2313 ATA_ID_SERNO_LEN); 2314 num += ATA_ID_SERNO_LEN; 2315 2316 if (ata_id_has_wwn(args->id)) { 2317 /* SAT defined lu world wide name */ 2318 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2319 rbuf[num + 0] = 1; 2320 rbuf[num + 1] = 3; 2321 rbuf[num + 3] = ATA_ID_WWN_LEN; 2322 num += 4; 2323 ata_id_string(args->id, (unsigned char *) rbuf + num, 2324 ATA_ID_WWN, ATA_ID_WWN_LEN); 2325 num += ATA_ID_WWN_LEN; 2326 } 2327 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2328 return 0; 2329 } 2330 2331 /** 2332 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2333 * @args: device IDENTIFY data / SCSI command of interest. 2334 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2335 * 2336 * Yields SAT-specified ATA VPD page. 2337 * 2338 * LOCKING: 2339 * spin_lock_irqsave(host lock) 2340 */ 2341 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2342 { 2343 struct ata_taskfile tf; 2344 2345 memset(&tf, 0, sizeof(tf)); 2346 2347 rbuf[1] = 0x89; /* our page code */ 2348 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2349 rbuf[3] = (0x238 & 0xff); 2350 2351 memcpy(&rbuf[8], "linux ", 8); 2352 memcpy(&rbuf[16], "libata ", 16); 2353 memcpy(&rbuf[32], DRV_VERSION, 4); 2354 2355 /* we don't store the ATA device signature, so we fake it */ 2356 2357 tf.command = ATA_DRDY; /* really, this is Status reg */ 2358 tf.lbal = 0x1; 2359 tf.nsect = 0x1; 2360 2361 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2362 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2363 2364 rbuf[56] = ATA_CMD_ID_ATA; 2365 2366 memcpy(&rbuf[60], &args->id[0], 512); 2367 return 0; 2368 } 2369 2370 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2371 { 2372 u16 min_io_sectors; 2373 2374 rbuf[1] = 0xb0; 2375 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2376 2377 /* 2378 * Optimal transfer length granularity. 2379 * 2380 * This is always one physical block, but for disks with a smaller 2381 * logical than physical sector size we need to figure out what the 2382 * latter is. 2383 */ 2384 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2385 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2386 2387 /* 2388 * Optimal unmap granularity. 2389 * 2390 * The ATA spec doesn't even know about a granularity or alignment 2391 * for the TRIM command. We can leave away most of the unmap related 2392 * VPD page entries, but we have specifify a granularity to signal 2393 * that we support some form of unmap - in thise case via WRITE SAME 2394 * with the unmap bit set. 2395 */ 2396 if (ata_id_has_trim(args->id)) { 2397 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); 2398 put_unaligned_be32(1, &rbuf[28]); 2399 } 2400 2401 return 0; 2402 } 2403 2404 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2405 { 2406 int form_factor = ata_id_form_factor(args->id); 2407 int media_rotation_rate = ata_id_rotation_rate(args->id); 2408 u8 zoned = ata_id_zoned_cap(args->id); 2409 2410 rbuf[1] = 0xb1; 2411 rbuf[3] = 0x3c; 2412 rbuf[4] = media_rotation_rate >> 8; 2413 rbuf[5] = media_rotation_rate; 2414 rbuf[7] = form_factor; 2415 if (zoned) 2416 rbuf[8] = (zoned << 4); 2417 2418 return 0; 2419 } 2420 2421 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2422 { 2423 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2424 rbuf[1] = 0xb2; 2425 rbuf[3] = 0x4; 2426 rbuf[5] = 1 << 6; /* TPWS */ 2427 2428 return 0; 2429 } 2430 2431 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2432 { 2433 /* 2434 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2435 */ 2436 rbuf[1] = 0xb6; 2437 rbuf[3] = 0x3C; 2438 2439 /* 2440 * URSWRZ bit is only meaningful for host-managed ZAC drives 2441 */ 2442 if (args->dev->zac_zoned_cap & 1) 2443 rbuf[4] |= 1; 2444 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2445 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2446 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2447 2448 return 0; 2449 } 2450 2451 /** 2452 * modecpy - Prepare response for MODE SENSE 2453 * @dest: output buffer 2454 * @src: data being copied 2455 * @n: length of mode page 2456 * @changeable: whether changeable parameters are requested 2457 * 2458 * Generate a generic MODE SENSE page for either current or changeable 2459 * parameters. 2460 * 2461 * LOCKING: 2462 * None. 2463 */ 2464 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2465 { 2466 if (changeable) { 2467 memcpy(dest, src, 2); 2468 memset(dest + 2, 0, n - 2); 2469 } else { 2470 memcpy(dest, src, n); 2471 } 2472 } 2473 2474 /** 2475 * ata_msense_caching - Simulate MODE SENSE caching info page 2476 * @id: device IDENTIFY data 2477 * @buf: output buffer 2478 * @changeable: whether changeable parameters are requested 2479 * 2480 * Generate a caching info page, which conditionally indicates 2481 * write caching to the SCSI layer, depending on device 2482 * capabilities. 2483 * 2484 * LOCKING: 2485 * None. 2486 */ 2487 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2488 { 2489 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2490 if (changeable) { 2491 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2492 } else { 2493 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2494 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2495 } 2496 return sizeof(def_cache_mpage); 2497 } 2498 2499 /** 2500 * ata_msense_control - Simulate MODE SENSE control mode page 2501 * @dev: ATA device of interest 2502 * @buf: output buffer 2503 * @changeable: whether changeable parameters are requested 2504 * 2505 * Generate a generic MODE SENSE control mode page. 2506 * 2507 * LOCKING: 2508 * None. 2509 */ 2510 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2511 bool changeable) 2512 { 2513 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2514 if (changeable) { 2515 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2516 } else { 2517 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2518 2519 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2520 } 2521 return sizeof(def_control_mpage); 2522 } 2523 2524 /** 2525 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2526 * @buf: output buffer 2527 * @changeable: whether changeable parameters are requested 2528 * 2529 * Generate a generic MODE SENSE r/w error recovery page. 2530 * 2531 * LOCKING: 2532 * None. 2533 */ 2534 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2535 { 2536 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2537 changeable); 2538 return sizeof(def_rw_recovery_mpage); 2539 } 2540 2541 /* 2542 * We can turn this into a real blacklist if it's needed, for now just 2543 * blacklist any Maxtor BANC1G10 revision firmware 2544 */ 2545 static int ata_dev_supports_fua(u16 *id) 2546 { 2547 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2548 2549 if (!libata_fua) 2550 return 0; 2551 if (!ata_id_has_fua(id)) 2552 return 0; 2553 2554 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2555 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2556 2557 if (strcmp(model, "Maxtor")) 2558 return 1; 2559 if (strcmp(fw, "BANC1G10")) 2560 return 1; 2561 2562 return 0; /* blacklisted */ 2563 } 2564 2565 /** 2566 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2567 * @args: device IDENTIFY data / SCSI command of interest. 2568 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2569 * 2570 * Simulate MODE SENSE commands. Assume this is invoked for direct 2571 * access devices (e.g. disks) only. There should be no block 2572 * descriptor for other device types. 2573 * 2574 * LOCKING: 2575 * spin_lock_irqsave(host lock) 2576 */ 2577 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2578 { 2579 struct ata_device *dev = args->dev; 2580 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2581 const u8 sat_blk_desc[] = { 2582 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2583 0, 2584 0, 0x2, 0x0 /* block length: 512 bytes */ 2585 }; 2586 u8 pg, spg; 2587 unsigned int ebd, page_control, six_byte; 2588 u8 dpofua, bp = 0xff; 2589 u16 fp; 2590 2591 VPRINTK("ENTER\n"); 2592 2593 six_byte = (scsicmd[0] == MODE_SENSE); 2594 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2595 /* 2596 * LLBA bit in msense(10) ignored (compliant) 2597 */ 2598 2599 page_control = scsicmd[2] >> 6; 2600 switch (page_control) { 2601 case 0: /* current */ 2602 case 1: /* changeable */ 2603 case 2: /* defaults */ 2604 break; /* supported */ 2605 case 3: /* saved */ 2606 goto saving_not_supp; 2607 default: 2608 fp = 2; 2609 bp = 6; 2610 goto invalid_fld; 2611 } 2612 2613 if (six_byte) 2614 p += 4 + (ebd ? 8 : 0); 2615 else 2616 p += 8 + (ebd ? 8 : 0); 2617 2618 pg = scsicmd[2] & 0x3f; 2619 spg = scsicmd[3]; 2620 /* 2621 * No mode subpages supported (yet) but asking for _all_ 2622 * subpages may be valid 2623 */ 2624 if (spg && (spg != ALL_SUB_MPAGES)) { 2625 fp = 3; 2626 goto invalid_fld; 2627 } 2628 2629 switch(pg) { 2630 case RW_RECOVERY_MPAGE: 2631 p += ata_msense_rw_recovery(p, page_control == 1); 2632 break; 2633 2634 case CACHE_MPAGE: 2635 p += ata_msense_caching(args->id, p, page_control == 1); 2636 break; 2637 2638 case CONTROL_MPAGE: 2639 p += ata_msense_control(args->dev, p, page_control == 1); 2640 break; 2641 2642 case ALL_MPAGES: 2643 p += ata_msense_rw_recovery(p, page_control == 1); 2644 p += ata_msense_caching(args->id, p, page_control == 1); 2645 p += ata_msense_control(args->dev, p, page_control == 1); 2646 break; 2647 2648 default: /* invalid page code */ 2649 fp = 2; 2650 goto invalid_fld; 2651 } 2652 2653 dpofua = 0; 2654 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2655 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2656 dpofua = 1 << 4; 2657 2658 if (six_byte) { 2659 rbuf[0] = p - rbuf - 1; 2660 rbuf[2] |= dpofua; 2661 if (ebd) { 2662 rbuf[3] = sizeof(sat_blk_desc); 2663 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2664 } 2665 } else { 2666 unsigned int output_len = p - rbuf - 2; 2667 2668 rbuf[0] = output_len >> 8; 2669 rbuf[1] = output_len; 2670 rbuf[3] |= dpofua; 2671 if (ebd) { 2672 rbuf[7] = sizeof(sat_blk_desc); 2673 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2674 } 2675 } 2676 return 0; 2677 2678 invalid_fld: 2679 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2680 return 1; 2681 2682 saving_not_supp: 2683 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2684 /* "Saving parameters not supported" */ 2685 return 1; 2686 } 2687 2688 /** 2689 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2690 * @args: device IDENTIFY data / SCSI command of interest. 2691 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2692 * 2693 * Simulate READ CAPACITY commands. 2694 * 2695 * LOCKING: 2696 * None. 2697 */ 2698 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2699 { 2700 struct ata_device *dev = args->dev; 2701 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2702 u32 sector_size; /* physical sector size in bytes */ 2703 u8 log2_per_phys; 2704 u16 lowest_aligned; 2705 2706 sector_size = ata_id_logical_sector_size(dev->id); 2707 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2708 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2709 2710 VPRINTK("ENTER\n"); 2711 2712 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2713 if (last_lba >= 0xffffffffULL) 2714 last_lba = 0xffffffff; 2715 2716 /* sector count, 32-bit */ 2717 rbuf[0] = last_lba >> (8 * 3); 2718 rbuf[1] = last_lba >> (8 * 2); 2719 rbuf[2] = last_lba >> (8 * 1); 2720 rbuf[3] = last_lba; 2721 2722 /* sector size */ 2723 rbuf[4] = sector_size >> (8 * 3); 2724 rbuf[5] = sector_size >> (8 * 2); 2725 rbuf[6] = sector_size >> (8 * 1); 2726 rbuf[7] = sector_size; 2727 } else { 2728 /* sector count, 64-bit */ 2729 rbuf[0] = last_lba >> (8 * 7); 2730 rbuf[1] = last_lba >> (8 * 6); 2731 rbuf[2] = last_lba >> (8 * 5); 2732 rbuf[3] = last_lba >> (8 * 4); 2733 rbuf[4] = last_lba >> (8 * 3); 2734 rbuf[5] = last_lba >> (8 * 2); 2735 rbuf[6] = last_lba >> (8 * 1); 2736 rbuf[7] = last_lba; 2737 2738 /* sector size */ 2739 rbuf[ 8] = sector_size >> (8 * 3); 2740 rbuf[ 9] = sector_size >> (8 * 2); 2741 rbuf[10] = sector_size >> (8 * 1); 2742 rbuf[11] = sector_size; 2743 2744 rbuf[12] = 0; 2745 rbuf[13] = log2_per_phys; 2746 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2747 rbuf[15] = lowest_aligned; 2748 2749 if (ata_id_has_trim(args->id) && 2750 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2751 rbuf[14] |= 0x80; /* LBPME */ 2752 2753 if (ata_id_has_zero_after_trim(args->id) && 2754 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2755 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2756 rbuf[14] |= 0x40; /* LBPRZ */ 2757 } 2758 } 2759 if (ata_id_zoned_cap(args->id) || 2760 args->dev->class == ATA_DEV_ZAC) 2761 rbuf[12] = (1 << 4); /* RC_BASIS */ 2762 } 2763 return 0; 2764 } 2765 2766 /** 2767 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2768 * @args: device IDENTIFY data / SCSI command of interest. 2769 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2770 * 2771 * Simulate REPORT LUNS command. 2772 * 2773 * LOCKING: 2774 * spin_lock_irqsave(host lock) 2775 */ 2776 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2777 { 2778 VPRINTK("ENTER\n"); 2779 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2780 2781 return 0; 2782 } 2783 2784 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2785 { 2786 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2787 /* FIXME: not quite right; we don't want the 2788 * translation of taskfile registers into 2789 * a sense descriptors, since that's only 2790 * correct for ATA, not ATAPI 2791 */ 2792 ata_gen_passthru_sense(qc); 2793 } 2794 2795 ata_qc_done(qc); 2796 } 2797 2798 /* is it pointless to prefer PIO for "safety reasons"? */ 2799 static inline int ata_pio_use_silly(struct ata_port *ap) 2800 { 2801 return (ap->flags & ATA_FLAG_PIO_DMA); 2802 } 2803 2804 static void atapi_request_sense(struct ata_queued_cmd *qc) 2805 { 2806 struct ata_port *ap = qc->ap; 2807 struct scsi_cmnd *cmd = qc->scsicmd; 2808 2809 DPRINTK("ATAPI request sense\n"); 2810 2811 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2812 2813 #ifdef CONFIG_ATA_SFF 2814 if (ap->ops->sff_tf_read) 2815 ap->ops->sff_tf_read(ap, &qc->tf); 2816 #endif 2817 2818 /* fill these in, for the case where they are -not- overwritten */ 2819 cmd->sense_buffer[0] = 0x70; 2820 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2821 2822 ata_qc_reinit(qc); 2823 2824 /* setup sg table and init transfer direction */ 2825 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2826 ata_sg_init(qc, &qc->sgent, 1); 2827 qc->dma_dir = DMA_FROM_DEVICE; 2828 2829 memset(&qc->cdb, 0, qc->dev->cdb_len); 2830 qc->cdb[0] = REQUEST_SENSE; 2831 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2832 2833 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2834 qc->tf.command = ATA_CMD_PACKET; 2835 2836 if (ata_pio_use_silly(ap)) { 2837 qc->tf.protocol = ATAPI_PROT_DMA; 2838 qc->tf.feature |= ATAPI_PKT_DMA; 2839 } else { 2840 qc->tf.protocol = ATAPI_PROT_PIO; 2841 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2842 qc->tf.lbah = 0; 2843 } 2844 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2845 2846 qc->complete_fn = atapi_sense_complete; 2847 2848 ata_qc_issue(qc); 2849 2850 DPRINTK("EXIT\n"); 2851 } 2852 2853 /* 2854 * ATAPI devices typically report zero for their SCSI version, and sometimes 2855 * deviate from the spec WRT response data format. If SCSI version is 2856 * reported as zero like normal, then we make the following fixups: 2857 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a 2858 * modern device. 2859 * 2) Ensure response data format / ATAPI information are always correct. 2860 */ 2861 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd) 2862 { 2863 u8 buf[4]; 2864 2865 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2866 if (buf[2] == 0) { 2867 buf[2] = 0x5; 2868 buf[3] = 0x32; 2869 } 2870 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4); 2871 } 2872 2873 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2874 { 2875 struct scsi_cmnd *cmd = qc->scsicmd; 2876 unsigned int err_mask = qc->err_mask; 2877 2878 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2879 2880 /* handle completion from new EH */ 2881 if (unlikely(qc->ap->ops->error_handler && 2882 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2883 2884 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2885 /* FIXME: not quite right; we don't want the 2886 * translation of taskfile registers into a 2887 * sense descriptors, since that's only 2888 * correct for ATA, not ATAPI 2889 */ 2890 ata_gen_passthru_sense(qc); 2891 } 2892 2893 /* SCSI EH automatically locks door if sdev->locked is 2894 * set. Sometimes door lock request continues to 2895 * fail, for example, when no media is present. This 2896 * creates a loop - SCSI EH issues door lock which 2897 * fails and gets invoked again to acquire sense data 2898 * for the failed command. 2899 * 2900 * If door lock fails, always clear sdev->locked to 2901 * avoid this infinite loop. 2902 * 2903 * This may happen before SCSI scan is complete. Make 2904 * sure qc->dev->sdev isn't NULL before dereferencing. 2905 */ 2906 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2907 qc->dev->sdev->locked = 0; 2908 2909 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2910 ata_qc_done(qc); 2911 return; 2912 } 2913 2914 /* successful completion or old EH failure path */ 2915 if (unlikely(err_mask & AC_ERR_DEV)) { 2916 cmd->result = SAM_STAT_CHECK_CONDITION; 2917 atapi_request_sense(qc); 2918 return; 2919 } else if (unlikely(err_mask)) { 2920 /* FIXME: not quite right; we don't want the 2921 * translation of taskfile registers into 2922 * a sense descriptors, since that's only 2923 * correct for ATA, not ATAPI 2924 */ 2925 ata_gen_passthru_sense(qc); 2926 } else { 2927 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) 2928 atapi_fixup_inquiry(cmd); 2929 cmd->result = SAM_STAT_GOOD; 2930 } 2931 2932 ata_qc_done(qc); 2933 } 2934 /** 2935 * atapi_xlat - Initialize PACKET taskfile 2936 * @qc: command structure to be initialized 2937 * 2938 * LOCKING: 2939 * spin_lock_irqsave(host lock) 2940 * 2941 * RETURNS: 2942 * Zero on success, non-zero on failure. 2943 */ 2944 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2945 { 2946 struct scsi_cmnd *scmd = qc->scsicmd; 2947 struct ata_device *dev = qc->dev; 2948 int nodata = (scmd->sc_data_direction == DMA_NONE); 2949 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2950 unsigned int nbytes; 2951 2952 memset(qc->cdb, 0, dev->cdb_len); 2953 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2954 2955 qc->complete_fn = atapi_qc_complete; 2956 2957 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2958 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2959 qc->tf.flags |= ATA_TFLAG_WRITE; 2960 DPRINTK("direction: write\n"); 2961 } 2962 2963 qc->tf.command = ATA_CMD_PACKET; 2964 ata_qc_set_pc_nbytes(qc); 2965 2966 /* check whether ATAPI DMA is safe */ 2967 if (!nodata && !using_pio && atapi_check_dma(qc)) 2968 using_pio = 1; 2969 2970 /* Some controller variants snoop this value for Packet 2971 * transfers to do state machine and FIFO management. Thus we 2972 * want to set it properly, and for DMA where it is 2973 * effectively meaningless. 2974 */ 2975 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2976 2977 /* Most ATAPI devices which honor transfer chunk size don't 2978 * behave according to the spec when odd chunk size which 2979 * matches the transfer length is specified. If the number of 2980 * bytes to transfer is 2n+1. According to the spec, what 2981 * should happen is to indicate that 2n+1 is going to be 2982 * transferred and transfer 2n+2 bytes where the last byte is 2983 * padding. 2984 * 2985 * In practice, this doesn't happen. ATAPI devices first 2986 * indicate and transfer 2n bytes and then indicate and 2987 * transfer 2 bytes where the last byte is padding. 2988 * 2989 * This inconsistency confuses several controllers which 2990 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2991 * These controllers use actual number of transferred bytes to 2992 * update DMA poitner and transfer of 4n+2 bytes make those 2993 * controller push DMA pointer by 4n+4 bytes because SATA data 2994 * FISes are aligned to 4 bytes. This causes data corruption 2995 * and buffer overrun. 2996 * 2997 * Always setting nbytes to even number solves this problem 2998 * because then ATAPI devices don't have to split data at 2n 2999 * boundaries. 3000 */ 3001 if (nbytes & 0x1) 3002 nbytes++; 3003 3004 qc->tf.lbam = (nbytes & 0xFF); 3005 qc->tf.lbah = (nbytes >> 8); 3006 3007 if (nodata) 3008 qc->tf.protocol = ATAPI_PROT_NODATA; 3009 else if (using_pio) 3010 qc->tf.protocol = ATAPI_PROT_PIO; 3011 else { 3012 /* DMA data xfer */ 3013 qc->tf.protocol = ATAPI_PROT_DMA; 3014 qc->tf.feature |= ATAPI_PKT_DMA; 3015 3016 if ((dev->flags & ATA_DFLAG_DMADIR) && 3017 (scmd->sc_data_direction != DMA_TO_DEVICE)) 3018 /* some SATA bridges need us to indicate data xfer direction */ 3019 qc->tf.feature |= ATAPI_DMADIR; 3020 } 3021 3022 3023 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 3024 as ATAPI tape drives don't get this right otherwise */ 3025 return 0; 3026 } 3027 3028 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 3029 { 3030 if (!sata_pmp_attached(ap)) { 3031 if (likely(devno < ata_link_max_devices(&ap->link))) 3032 return &ap->link.device[devno]; 3033 } else { 3034 if (likely(devno < ap->nr_pmp_links)) 3035 return &ap->pmp_link[devno].device[0]; 3036 } 3037 3038 return NULL; 3039 } 3040 3041 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 3042 const struct scsi_device *scsidev) 3043 { 3044 int devno; 3045 3046 /* skip commands not addressed to targets we simulate */ 3047 if (!sata_pmp_attached(ap)) { 3048 if (unlikely(scsidev->channel || scsidev->lun)) 3049 return NULL; 3050 devno = scsidev->id; 3051 } else { 3052 if (unlikely(scsidev->id || scsidev->lun)) 3053 return NULL; 3054 devno = scsidev->channel; 3055 } 3056 3057 return ata_find_dev(ap, devno); 3058 } 3059 3060 /** 3061 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3062 * @ap: ATA port to which the device is attached 3063 * @scsidev: SCSI device from which we derive the ATA device 3064 * 3065 * Given various information provided in struct scsi_cmnd, 3066 * map that onto an ATA bus, and using that mapping 3067 * determine which ata_device is associated with the 3068 * SCSI command to be sent. 3069 * 3070 * LOCKING: 3071 * spin_lock_irqsave(host lock) 3072 * 3073 * RETURNS: 3074 * Associated ATA device, or %NULL if not found. 3075 */ 3076 static struct ata_device * 3077 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3078 { 3079 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3080 3081 if (unlikely(!dev || !ata_dev_enabled(dev))) 3082 return NULL; 3083 3084 return dev; 3085 } 3086 3087 /* 3088 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3089 * @byte1: Byte 1 from pass-thru CDB. 3090 * 3091 * RETURNS: 3092 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3093 */ 3094 static u8 3095 ata_scsi_map_proto(u8 byte1) 3096 { 3097 switch((byte1 & 0x1e) >> 1) { 3098 case 3: /* Non-data */ 3099 return ATA_PROT_NODATA; 3100 3101 case 6: /* DMA */ 3102 case 10: /* UDMA Data-in */ 3103 case 11: /* UDMA Data-Out */ 3104 return ATA_PROT_DMA; 3105 3106 case 4: /* PIO Data-in */ 3107 case 5: /* PIO Data-out */ 3108 return ATA_PROT_PIO; 3109 3110 case 12: /* FPDMA */ 3111 return ATA_PROT_NCQ; 3112 3113 case 0: /* Hard Reset */ 3114 case 1: /* SRST */ 3115 case 8: /* Device Diagnostic */ 3116 case 9: /* Device Reset */ 3117 case 7: /* DMA Queued */ 3118 case 15: /* Return Response Info */ 3119 default: /* Reserved */ 3120 break; 3121 } 3122 3123 return ATA_PROT_UNKNOWN; 3124 } 3125 3126 /** 3127 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3128 * @qc: command structure to be initialized 3129 * 3130 * Handles either 12 or 16-byte versions of the CDB. 3131 * 3132 * RETURNS: 3133 * Zero on success, non-zero on failure. 3134 */ 3135 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3136 { 3137 struct ata_taskfile *tf = &(qc->tf); 3138 struct scsi_cmnd *scmd = qc->scsicmd; 3139 struct ata_device *dev = qc->dev; 3140 const u8 *cdb = scmd->cmnd; 3141 u16 fp; 3142 3143 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) { 3144 fp = 1; 3145 goto invalid_fld; 3146 } 3147 3148 if (ata_is_ncq(tf->protocol) && (cdb[2] & 0x3) == 0) 3149 tf->protocol = ATA_PROT_NCQ_NODATA; 3150 3151 /* enable LBA */ 3152 tf->flags |= ATA_TFLAG_LBA; 3153 3154 /* 3155 * 12 and 16 byte CDBs use different offsets to 3156 * provide the various register values. 3157 */ 3158 if (cdb[0] == ATA_16) { 3159 /* 3160 * 16-byte CDB - may contain extended commands. 3161 * 3162 * If that is the case, copy the upper byte register values. 3163 */ 3164 if (cdb[1] & 0x01) { 3165 tf->hob_feature = cdb[3]; 3166 tf->hob_nsect = cdb[5]; 3167 tf->hob_lbal = cdb[7]; 3168 tf->hob_lbam = cdb[9]; 3169 tf->hob_lbah = cdb[11]; 3170 tf->flags |= ATA_TFLAG_LBA48; 3171 } else 3172 tf->flags &= ~ATA_TFLAG_LBA48; 3173 3174 /* 3175 * Always copy low byte, device and command registers. 3176 */ 3177 tf->feature = cdb[4]; 3178 tf->nsect = cdb[6]; 3179 tf->lbal = cdb[8]; 3180 tf->lbam = cdb[10]; 3181 tf->lbah = cdb[12]; 3182 tf->device = cdb[13]; 3183 tf->command = cdb[14]; 3184 } else { 3185 /* 3186 * 12-byte CDB - incapable of extended commands. 3187 */ 3188 tf->flags &= ~ATA_TFLAG_LBA48; 3189 3190 tf->feature = cdb[3]; 3191 tf->nsect = cdb[4]; 3192 tf->lbal = cdb[5]; 3193 tf->lbam = cdb[6]; 3194 tf->lbah = cdb[7]; 3195 tf->device = cdb[8]; 3196 tf->command = cdb[9]; 3197 } 3198 3199 /* For NCQ commands copy the tag value */ 3200 if (ata_is_ncq(tf->protocol)) 3201 tf->nsect = qc->tag << 3; 3202 3203 /* enforce correct master/slave bit */ 3204 tf->device = dev->devno ? 3205 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3206 3207 switch (tf->command) { 3208 /* READ/WRITE LONG use a non-standard sect_size */ 3209 case ATA_CMD_READ_LONG: 3210 case ATA_CMD_READ_LONG_ONCE: 3211 case ATA_CMD_WRITE_LONG: 3212 case ATA_CMD_WRITE_LONG_ONCE: 3213 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3214 fp = 1; 3215 goto invalid_fld; 3216 } 3217 qc->sect_size = scsi_bufflen(scmd); 3218 break; 3219 3220 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3221 case ATA_CMD_CFA_WRITE_NE: 3222 case ATA_CMD_CFA_TRANS_SECT: 3223 case ATA_CMD_CFA_WRITE_MULT_NE: 3224 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3225 case ATA_CMD_READ: 3226 case ATA_CMD_READ_EXT: 3227 case ATA_CMD_READ_QUEUED: 3228 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3229 case ATA_CMD_FPDMA_READ: 3230 case ATA_CMD_READ_MULTI: 3231 case ATA_CMD_READ_MULTI_EXT: 3232 case ATA_CMD_PIO_READ: 3233 case ATA_CMD_PIO_READ_EXT: 3234 case ATA_CMD_READ_STREAM_DMA_EXT: 3235 case ATA_CMD_READ_STREAM_EXT: 3236 case ATA_CMD_VERIFY: 3237 case ATA_CMD_VERIFY_EXT: 3238 case ATA_CMD_WRITE: 3239 case ATA_CMD_WRITE_EXT: 3240 case ATA_CMD_WRITE_FUA_EXT: 3241 case ATA_CMD_WRITE_QUEUED: 3242 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3243 case ATA_CMD_FPDMA_WRITE: 3244 case ATA_CMD_WRITE_MULTI: 3245 case ATA_CMD_WRITE_MULTI_EXT: 3246 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3247 case ATA_CMD_PIO_WRITE: 3248 case ATA_CMD_PIO_WRITE_EXT: 3249 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3250 case ATA_CMD_WRITE_STREAM_EXT: 3251 qc->sect_size = scmd->device->sector_size; 3252 break; 3253 3254 /* Everything else uses 512 byte "sectors" */ 3255 default: 3256 qc->sect_size = ATA_SECT_SIZE; 3257 } 3258 3259 /* 3260 * Set flags so that all registers will be written, pass on 3261 * write indication (used for PIO/DMA setup), result TF is 3262 * copied back and we don't whine too much about its failure. 3263 */ 3264 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3265 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3266 tf->flags |= ATA_TFLAG_WRITE; 3267 3268 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3269 3270 /* 3271 * Set transfer length. 3272 * 3273 * TODO: find out if we need to do more here to 3274 * cover scatter/gather case. 3275 */ 3276 ata_qc_set_pc_nbytes(qc); 3277 3278 /* We may not issue DMA commands if no DMA mode is set */ 3279 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3280 fp = 1; 3281 goto invalid_fld; 3282 } 3283 3284 /* sanity check for pio multi commands */ 3285 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3286 fp = 1; 3287 goto invalid_fld; 3288 } 3289 3290 if (is_multi_taskfile(tf)) { 3291 unsigned int multi_count = 1 << (cdb[1] >> 5); 3292 3293 /* compare the passed through multi_count 3294 * with the cached multi_count of libata 3295 */ 3296 if (multi_count != dev->multi_count) 3297 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3298 multi_count); 3299 } 3300 3301 /* 3302 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3303 * SET_FEATURES - XFER MODE must be preceded/succeeded 3304 * by an update to hardware-specific registers for each 3305 * controller (i.e. the reason for ->set_piomode(), 3306 * ->set_dmamode(), and ->post_set_mode() hooks). 3307 */ 3308 if (tf->command == ATA_CMD_SET_FEATURES && 3309 tf->feature == SETFEATURES_XFER) { 3310 fp = (cdb[0] == ATA_16) ? 4 : 3; 3311 goto invalid_fld; 3312 } 3313 3314 /* 3315 * Filter TPM commands by default. These provide an 3316 * essentially uncontrolled encrypted "back door" between 3317 * applications and the disk. Set libata.allow_tpm=1 if you 3318 * have a real reason for wanting to use them. This ensures 3319 * that installed software cannot easily mess stuff up without 3320 * user intent. DVR type users will probably ship with this enabled 3321 * for movie content management. 3322 * 3323 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3324 * for this and should do in future but that it is not sufficient as 3325 * DCS is an optional feature set. Thus we also do the software filter 3326 * so that we comply with the TC consortium stated goal that the user 3327 * can turn off TC features of their system. 3328 */ 3329 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3330 fp = (cdb[0] == ATA_16) ? 14 : 9; 3331 goto invalid_fld; 3332 } 3333 3334 return 0; 3335 3336 invalid_fld: 3337 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3338 return 1; 3339 } 3340 3341 /** 3342 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3343 * @cmd: SCSI command being translated 3344 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3345 * @sector: Starting sector 3346 * @count: Total Range of request in logical sectors 3347 * 3348 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3349 * descriptor. 3350 * 3351 * Upto 64 entries of the format: 3352 * 63:48 Range Length 3353 * 47:0 LBA 3354 * 3355 * Range Length of 0 is ignored. 3356 * LBA's should be sorted order and not overlap. 3357 * 3358 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3359 * 3360 * Return: Number of bytes copied into sglist. 3361 */ 3362 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3363 u64 sector, u32 count) 3364 { 3365 struct scsi_device *sdp = cmd->device; 3366 size_t len = sdp->sector_size; 3367 size_t r; 3368 __le64 *buf; 3369 u32 i = 0; 3370 unsigned long flags; 3371 3372 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3373 3374 if (len > ATA_SCSI_RBUF_SIZE) 3375 len = ATA_SCSI_RBUF_SIZE; 3376 3377 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3378 buf = ((void *)ata_scsi_rbuf); 3379 memset(buf, 0, len); 3380 while (i < trmax) { 3381 u64 entry = sector | 3382 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3383 buf[i++] = __cpu_to_le64(entry); 3384 if (count <= 0xffff) 3385 break; 3386 count -= 0xffff; 3387 sector += 0xffff; 3388 } 3389 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3390 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3391 3392 return r; 3393 } 3394 3395 /** 3396 * ata_format_dsm_trim_descr() - SATL Write Same to ATA SCT Write Same 3397 * @cmd: SCSI command being translated 3398 * @lba: Starting sector 3399 * @num: Number of sectors to be zero'd. 3400 * 3401 * Rewrite the WRITE SAME payload to be an SCT Write Same formatted 3402 * descriptor. 3403 * NOTE: Writes a pattern (0's) in the foreground. 3404 * 3405 * Return: Number of bytes copied into sglist. 3406 */ 3407 static size_t ata_format_sct_write_same(struct scsi_cmnd *cmd, u64 lba, u64 num) 3408 { 3409 struct scsi_device *sdp = cmd->device; 3410 size_t len = sdp->sector_size; 3411 size_t r; 3412 u16 *buf; 3413 unsigned long flags; 3414 3415 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3416 buf = ((void *)ata_scsi_rbuf); 3417 3418 put_unaligned_le16(0x0002, &buf[0]); /* SCT_ACT_WRITE_SAME */ 3419 put_unaligned_le16(0x0101, &buf[1]); /* WRITE PTRN FG */ 3420 put_unaligned_le64(lba, &buf[2]); 3421 put_unaligned_le64(num, &buf[6]); 3422 put_unaligned_le32(0u, &buf[10]); /* pattern */ 3423 3424 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3425 3426 if (len > ATA_SCSI_RBUF_SIZE) 3427 len = ATA_SCSI_RBUF_SIZE; 3428 3429 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3430 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3431 3432 return r; 3433 } 3434 3435 /** 3436 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3437 * @qc: Command to be translated 3438 * 3439 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3440 * an SCT Write Same command. 3441 * Based on WRITE SAME has the UNMAP flag 3442 * When set translate to DSM TRIM 3443 * When clear translate to SCT Write Same 3444 */ 3445 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3446 { 3447 struct ata_taskfile *tf = &qc->tf; 3448 struct scsi_cmnd *scmd = qc->scsicmd; 3449 struct scsi_device *sdp = scmd->device; 3450 size_t len = sdp->sector_size; 3451 struct ata_device *dev = qc->dev; 3452 const u8 *cdb = scmd->cmnd; 3453 u64 block; 3454 u32 n_block; 3455 const u32 trmax = len >> 3; 3456 u32 size; 3457 u16 fp; 3458 u8 bp = 0xff; 3459 u8 unmap = cdb[1] & 0x8; 3460 3461 /* we may not issue DMA commands if no DMA mode is set */ 3462 if (unlikely(!dev->dma_mode)) 3463 goto invalid_opcode; 3464 3465 if (unlikely(scmd->cmd_len < 16)) { 3466 fp = 15; 3467 goto invalid_fld; 3468 } 3469 scsi_16_lba_len(cdb, &block, &n_block); 3470 3471 if (unmap) { 3472 /* If trim is not enabled the cmd is invalid. */ 3473 if ((dev->horkage & ATA_HORKAGE_NOTRIM) || 3474 !ata_id_has_trim(dev->id)) { 3475 fp = 1; 3476 bp = 3; 3477 goto invalid_fld; 3478 } 3479 /* If the request is too large the cmd is invalid */ 3480 if (n_block > 0xffff * trmax) { 3481 fp = 2; 3482 goto invalid_fld; 3483 } 3484 } else { 3485 /* If write same is not available the cmd is invalid */ 3486 if (!ata_id_sct_write_same(dev->id)) { 3487 fp = 1; 3488 bp = 3; 3489 goto invalid_fld; 3490 } 3491 } 3492 3493 /* 3494 * WRITE SAME always has a sector sized buffer as payload, this 3495 * should never be a multiple entry S/G list. 3496 */ 3497 if (!scsi_sg_count(scmd)) 3498 goto invalid_param_len; 3499 3500 /* 3501 * size must match sector size in bytes 3502 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3503 * is defined as number of 512 byte blocks to be transferred. 3504 */ 3505 if (unmap) { 3506 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3507 if (size != len) 3508 goto invalid_param_len; 3509 3510 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3511 /* Newer devices support queued TRIM commands */ 3512 tf->protocol = ATA_PROT_NCQ; 3513 tf->command = ATA_CMD_FPDMA_SEND; 3514 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3515 tf->nsect = qc->tag << 3; 3516 tf->hob_feature = (size / 512) >> 8; 3517 tf->feature = size / 512; 3518 3519 tf->auxiliary = 1; 3520 } else { 3521 tf->protocol = ATA_PROT_DMA; 3522 tf->hob_feature = 0; 3523 tf->feature = ATA_DSM_TRIM; 3524 tf->hob_nsect = (size / 512) >> 8; 3525 tf->nsect = size / 512; 3526 tf->command = ATA_CMD_DSM; 3527 } 3528 } else { 3529 size = ata_format_sct_write_same(scmd, block, n_block); 3530 if (size != len) 3531 goto invalid_param_len; 3532 3533 tf->hob_feature = 0; 3534 tf->feature = 0; 3535 tf->hob_nsect = 0; 3536 tf->nsect = 1; 3537 tf->lbah = 0; 3538 tf->lbam = 0; 3539 tf->lbal = ATA_CMD_STANDBYNOW1; 3540 tf->hob_lbah = 0; 3541 tf->hob_lbam = 0; 3542 tf->hob_lbal = 0; 3543 tf->device = ATA_CMD_STANDBYNOW1; 3544 tf->protocol = ATA_PROT_DMA; 3545 tf->command = ATA_CMD_WRITE_LOG_DMA_EXT; 3546 if (unlikely(dev->flags & ATA_DFLAG_PIO)) 3547 tf->command = ATA_CMD_WRITE_LOG_EXT; 3548 } 3549 3550 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3551 ATA_TFLAG_WRITE; 3552 3553 ata_qc_set_pc_nbytes(qc); 3554 3555 return 0; 3556 3557 invalid_fld: 3558 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3559 return 1; 3560 invalid_param_len: 3561 /* "Parameter list length error" */ 3562 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3563 return 1; 3564 invalid_opcode: 3565 /* "Invalid command operation code" */ 3566 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3567 return 1; 3568 } 3569 3570 /** 3571 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3572 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3573 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3574 * 3575 * Yields a subset to satisfy scsi_report_opcode() 3576 * 3577 * LOCKING: 3578 * spin_lock_irqsave(host lock) 3579 */ 3580 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3581 { 3582 struct ata_device *dev = args->dev; 3583 u8 *cdb = args->cmd->cmnd; 3584 u8 supported = 0; 3585 unsigned int err = 0; 3586 3587 if (cdb[2] != 1) { 3588 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3589 err = 2; 3590 goto out; 3591 } 3592 switch (cdb[3]) { 3593 case INQUIRY: 3594 case MODE_SENSE: 3595 case MODE_SENSE_10: 3596 case READ_CAPACITY: 3597 case SERVICE_ACTION_IN_16: 3598 case REPORT_LUNS: 3599 case REQUEST_SENSE: 3600 case SYNCHRONIZE_CACHE: 3601 case REZERO_UNIT: 3602 case SEEK_6: 3603 case SEEK_10: 3604 case TEST_UNIT_READY: 3605 case SEND_DIAGNOSTIC: 3606 case MAINTENANCE_IN: 3607 case READ_6: 3608 case READ_10: 3609 case READ_16: 3610 case WRITE_6: 3611 case WRITE_10: 3612 case WRITE_16: 3613 case ATA_12: 3614 case ATA_16: 3615 case VERIFY: 3616 case VERIFY_16: 3617 case MODE_SELECT: 3618 case MODE_SELECT_10: 3619 case START_STOP: 3620 supported = 3; 3621 break; 3622 case WRITE_SAME_16: 3623 if (!ata_id_sct_write_same(dev->id)) 3624 break; 3625 /* fallthrough: if SCT ... only enable for ZBC */ 3626 case ZBC_IN: 3627 case ZBC_OUT: 3628 if (ata_id_zoned_cap(dev->id) || 3629 dev->class == ATA_DEV_ZAC) 3630 supported = 3; 3631 break; 3632 default: 3633 break; 3634 } 3635 out: 3636 rbuf[1] = supported; /* supported */ 3637 return err; 3638 } 3639 3640 /** 3641 * ata_scsi_report_zones_complete - convert ATA output 3642 * @qc: command structure returning the data 3643 * 3644 * Convert T-13 little-endian field representation into 3645 * T-10 big-endian field representation. 3646 * What a mess. 3647 */ 3648 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3649 { 3650 struct scsi_cmnd *scmd = qc->scsicmd; 3651 struct sg_mapping_iter miter; 3652 unsigned long flags; 3653 unsigned int bytes = 0; 3654 3655 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3656 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3657 3658 local_irq_save(flags); 3659 while (sg_miter_next(&miter)) { 3660 unsigned int offset = 0; 3661 3662 if (bytes == 0) { 3663 char *hdr; 3664 u32 list_length; 3665 u64 max_lba, opt_lba; 3666 u16 same; 3667 3668 /* Swizzle header */ 3669 hdr = miter.addr; 3670 list_length = get_unaligned_le32(&hdr[0]); 3671 same = get_unaligned_le16(&hdr[4]); 3672 max_lba = get_unaligned_le64(&hdr[8]); 3673 opt_lba = get_unaligned_le64(&hdr[16]); 3674 put_unaligned_be32(list_length, &hdr[0]); 3675 hdr[4] = same & 0xf; 3676 put_unaligned_be64(max_lba, &hdr[8]); 3677 put_unaligned_be64(opt_lba, &hdr[16]); 3678 offset += 64; 3679 bytes += 64; 3680 } 3681 while (offset < miter.length) { 3682 char *rec; 3683 u8 cond, type, non_seq, reset; 3684 u64 size, start, wp; 3685 3686 /* Swizzle zone descriptor */ 3687 rec = miter.addr + offset; 3688 type = rec[0] & 0xf; 3689 cond = (rec[1] >> 4) & 0xf; 3690 non_seq = (rec[1] & 2); 3691 reset = (rec[1] & 1); 3692 size = get_unaligned_le64(&rec[8]); 3693 start = get_unaligned_le64(&rec[16]); 3694 wp = get_unaligned_le64(&rec[24]); 3695 rec[0] = type; 3696 rec[1] = (cond << 4) | non_seq | reset; 3697 put_unaligned_be64(size, &rec[8]); 3698 put_unaligned_be64(start, &rec[16]); 3699 put_unaligned_be64(wp, &rec[24]); 3700 WARN_ON(offset + 64 > miter.length); 3701 offset += 64; 3702 bytes += 64; 3703 } 3704 } 3705 sg_miter_stop(&miter); 3706 local_irq_restore(flags); 3707 3708 ata_scsi_qc_complete(qc); 3709 } 3710 3711 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3712 { 3713 struct ata_taskfile *tf = &qc->tf; 3714 struct scsi_cmnd *scmd = qc->scsicmd; 3715 const u8 *cdb = scmd->cmnd; 3716 u16 sect, fp = (u16)-1; 3717 u8 sa, options, bp = 0xff; 3718 u64 block; 3719 u32 n_block; 3720 3721 if (unlikely(scmd->cmd_len < 16)) { 3722 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3723 scmd->cmd_len); 3724 fp = 15; 3725 goto invalid_fld; 3726 } 3727 scsi_16_lba_len(cdb, &block, &n_block); 3728 if (n_block != scsi_bufflen(scmd)) { 3729 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3730 n_block, scsi_bufflen(scmd)); 3731 goto invalid_param_len; 3732 } 3733 sa = cdb[1] & 0x1f; 3734 if (sa != ZI_REPORT_ZONES) { 3735 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3736 fp = 1; 3737 goto invalid_fld; 3738 } 3739 /* 3740 * ZAC allows only for transfers in 512 byte blocks, 3741 * and uses a 16 bit value for the transfer count. 3742 */ 3743 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3744 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3745 goto invalid_param_len; 3746 } 3747 sect = n_block / 512; 3748 options = cdb[14] & 0xbf; 3749 3750 if (ata_ncq_enabled(qc->dev) && 3751 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3752 tf->protocol = ATA_PROT_NCQ; 3753 tf->command = ATA_CMD_FPDMA_RECV; 3754 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3755 tf->nsect = qc->tag << 3; 3756 tf->feature = sect & 0xff; 3757 tf->hob_feature = (sect >> 8) & 0xff; 3758 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3759 } else { 3760 tf->command = ATA_CMD_ZAC_MGMT_IN; 3761 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3762 tf->protocol = ATA_PROT_DMA; 3763 tf->hob_feature = options; 3764 tf->hob_nsect = (sect >> 8) & 0xff; 3765 tf->nsect = sect & 0xff; 3766 } 3767 tf->device = ATA_LBA; 3768 tf->lbah = (block >> 16) & 0xff; 3769 tf->lbam = (block >> 8) & 0xff; 3770 tf->lbal = block & 0xff; 3771 tf->hob_lbah = (block >> 40) & 0xff; 3772 tf->hob_lbam = (block >> 32) & 0xff; 3773 tf->hob_lbal = (block >> 24) & 0xff; 3774 3775 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3776 qc->flags |= ATA_QCFLAG_RESULT_TF; 3777 3778 ata_qc_set_pc_nbytes(qc); 3779 3780 qc->complete_fn = ata_scsi_report_zones_complete; 3781 3782 return 0; 3783 3784 invalid_fld: 3785 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3786 return 1; 3787 3788 invalid_param_len: 3789 /* "Parameter list length error" */ 3790 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3791 return 1; 3792 } 3793 3794 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3795 { 3796 struct ata_taskfile *tf = &qc->tf; 3797 struct scsi_cmnd *scmd = qc->scsicmd; 3798 struct ata_device *dev = qc->dev; 3799 const u8 *cdb = scmd->cmnd; 3800 u8 all, sa; 3801 u64 block; 3802 u32 n_block; 3803 u16 fp = (u16)-1; 3804 3805 if (unlikely(scmd->cmd_len < 16)) { 3806 fp = 15; 3807 goto invalid_fld; 3808 } 3809 3810 sa = cdb[1] & 0x1f; 3811 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3812 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3813 fp = 1; 3814 goto invalid_fld; 3815 } 3816 3817 scsi_16_lba_len(cdb, &block, &n_block); 3818 if (n_block) { 3819 /* 3820 * ZAC MANAGEMENT OUT doesn't define any length 3821 */ 3822 goto invalid_param_len; 3823 } 3824 if (block > dev->n_sectors) 3825 goto out_of_range; 3826 3827 all = cdb[14] & 0x1; 3828 3829 if (ata_ncq_enabled(qc->dev) && 3830 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3831 tf->protocol = ATA_PROT_NCQ_NODATA; 3832 tf->command = ATA_CMD_NCQ_NON_DATA; 3833 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3834 tf->nsect = qc->tag << 3; 3835 tf->auxiliary = sa | ((u16)all << 8); 3836 } else { 3837 tf->protocol = ATA_PROT_NODATA; 3838 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3839 tf->feature = sa; 3840 tf->hob_feature = all; 3841 } 3842 tf->lbah = (block >> 16) & 0xff; 3843 tf->lbam = (block >> 8) & 0xff; 3844 tf->lbal = block & 0xff; 3845 tf->hob_lbah = (block >> 40) & 0xff; 3846 tf->hob_lbam = (block >> 32) & 0xff; 3847 tf->hob_lbal = (block >> 24) & 0xff; 3848 tf->device = ATA_LBA; 3849 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3850 3851 return 0; 3852 3853 invalid_fld: 3854 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3855 return 1; 3856 out_of_range: 3857 /* "Logical Block Address out of range" */ 3858 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00); 3859 return 1; 3860 invalid_param_len: 3861 /* "Parameter list length error" */ 3862 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3863 return 1; 3864 } 3865 3866 /** 3867 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3868 * @qc: Storage for translated ATA taskfile 3869 * @buf: input buffer 3870 * @len: number of valid bytes in the input buffer 3871 * @fp: out parameter for the failed field on error 3872 * 3873 * Prepare a taskfile to modify caching information for the device. 3874 * 3875 * LOCKING: 3876 * None. 3877 */ 3878 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3879 const u8 *buf, int len, u16 *fp) 3880 { 3881 struct ata_taskfile *tf = &qc->tf; 3882 struct ata_device *dev = qc->dev; 3883 u8 mpage[CACHE_MPAGE_LEN]; 3884 u8 wce; 3885 int i; 3886 3887 /* 3888 * The first two bytes of def_cache_mpage are a header, so offsets 3889 * in mpage are off by 2 compared to buf. Same for len. 3890 */ 3891 3892 if (len != CACHE_MPAGE_LEN - 2) { 3893 if (len < CACHE_MPAGE_LEN - 2) 3894 *fp = len; 3895 else 3896 *fp = CACHE_MPAGE_LEN - 2; 3897 return -EINVAL; 3898 } 3899 3900 wce = buf[0] & (1 << 2); 3901 3902 /* 3903 * Check that read-only bits are not modified. 3904 */ 3905 ata_msense_caching(dev->id, mpage, false); 3906 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3907 if (i == 0) 3908 continue; 3909 if (mpage[i + 2] != buf[i]) { 3910 *fp = i; 3911 return -EINVAL; 3912 } 3913 } 3914 3915 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3916 tf->protocol = ATA_PROT_NODATA; 3917 tf->nsect = 0; 3918 tf->command = ATA_CMD_SET_FEATURES; 3919 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3920 return 0; 3921 } 3922 3923 /** 3924 * ata_mselect_control - Simulate MODE SELECT for control page 3925 * @qc: Storage for translated ATA taskfile 3926 * @buf: input buffer 3927 * @len: number of valid bytes in the input buffer 3928 * @fp: out parameter for the failed field on error 3929 * 3930 * Prepare a taskfile to modify caching information for the device. 3931 * 3932 * LOCKING: 3933 * None. 3934 */ 3935 static int ata_mselect_control(struct ata_queued_cmd *qc, 3936 const u8 *buf, int len, u16 *fp) 3937 { 3938 struct ata_device *dev = qc->dev; 3939 u8 mpage[CONTROL_MPAGE_LEN]; 3940 u8 d_sense; 3941 int i; 3942 3943 /* 3944 * The first two bytes of def_control_mpage are a header, so offsets 3945 * in mpage are off by 2 compared to buf. Same for len. 3946 */ 3947 3948 if (len != CONTROL_MPAGE_LEN - 2) { 3949 if (len < CONTROL_MPAGE_LEN - 2) 3950 *fp = len; 3951 else 3952 *fp = CONTROL_MPAGE_LEN - 2; 3953 return -EINVAL; 3954 } 3955 3956 d_sense = buf[0] & (1 << 2); 3957 3958 /* 3959 * Check that read-only bits are not modified. 3960 */ 3961 ata_msense_control(dev, mpage, false); 3962 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3963 if (i == 0) 3964 continue; 3965 if (mpage[2 + i] != buf[i]) { 3966 *fp = i; 3967 return -EINVAL; 3968 } 3969 } 3970 if (d_sense & (1 << 2)) 3971 dev->flags |= ATA_DFLAG_D_SENSE; 3972 else 3973 dev->flags &= ~ATA_DFLAG_D_SENSE; 3974 return 0; 3975 } 3976 3977 /** 3978 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands 3979 * @qc: Storage for translated ATA taskfile 3980 * 3981 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3982 * Assume this is invoked for direct access devices (e.g. disks) only. 3983 * There should be no block descriptor for other device types. 3984 * 3985 * LOCKING: 3986 * spin_lock_irqsave(host lock) 3987 */ 3988 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3989 { 3990 struct scsi_cmnd *scmd = qc->scsicmd; 3991 const u8 *cdb = scmd->cmnd; 3992 const u8 *p; 3993 u8 pg, spg; 3994 unsigned six_byte, pg_len, hdr_len, bd_len; 3995 int len; 3996 u16 fp = (u16)-1; 3997 u8 bp = 0xff; 3998 3999 VPRINTK("ENTER\n"); 4000 4001 six_byte = (cdb[0] == MODE_SELECT); 4002 if (six_byte) { 4003 if (scmd->cmd_len < 5) { 4004 fp = 4; 4005 goto invalid_fld; 4006 } 4007 4008 len = cdb[4]; 4009 hdr_len = 4; 4010 } else { 4011 if (scmd->cmd_len < 9) { 4012 fp = 8; 4013 goto invalid_fld; 4014 } 4015 4016 len = (cdb[7] << 8) + cdb[8]; 4017 hdr_len = 8; 4018 } 4019 4020 /* We only support PF=1, SP=0. */ 4021 if ((cdb[1] & 0x11) != 0x10) { 4022 fp = 1; 4023 bp = (cdb[1] & 0x01) ? 1 : 5; 4024 goto invalid_fld; 4025 } 4026 4027 /* Test early for possible overrun. */ 4028 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 4029 goto invalid_param_len; 4030 4031 p = page_address(sg_page(scsi_sglist(scmd))); 4032 4033 /* Move past header and block descriptors. */ 4034 if (len < hdr_len) 4035 goto invalid_param_len; 4036 4037 if (six_byte) 4038 bd_len = p[3]; 4039 else 4040 bd_len = (p[6] << 8) + p[7]; 4041 4042 len -= hdr_len; 4043 p += hdr_len; 4044 if (len < bd_len) 4045 goto invalid_param_len; 4046 if (bd_len != 0 && bd_len != 8) { 4047 fp = (six_byte) ? 3 : 6; 4048 fp += bd_len + hdr_len; 4049 goto invalid_param; 4050 } 4051 4052 len -= bd_len; 4053 p += bd_len; 4054 if (len == 0) 4055 goto skip; 4056 4057 /* Parse both possible formats for the mode page headers. */ 4058 pg = p[0] & 0x3f; 4059 if (p[0] & 0x40) { 4060 if (len < 4) 4061 goto invalid_param_len; 4062 4063 spg = p[1]; 4064 pg_len = (p[2] << 8) | p[3]; 4065 p += 4; 4066 len -= 4; 4067 } else { 4068 if (len < 2) 4069 goto invalid_param_len; 4070 4071 spg = 0; 4072 pg_len = p[1]; 4073 p += 2; 4074 len -= 2; 4075 } 4076 4077 /* 4078 * No mode subpages supported (yet) but asking for _all_ 4079 * subpages may be valid 4080 */ 4081 if (spg && (spg != ALL_SUB_MPAGES)) { 4082 fp = (p[0] & 0x40) ? 1 : 0; 4083 fp += hdr_len + bd_len; 4084 goto invalid_param; 4085 } 4086 if (pg_len > len) 4087 goto invalid_param_len; 4088 4089 switch (pg) { 4090 case CACHE_MPAGE: 4091 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4092 fp += hdr_len + bd_len; 4093 goto invalid_param; 4094 } 4095 break; 4096 case CONTROL_MPAGE: 4097 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 4098 fp += hdr_len + bd_len; 4099 goto invalid_param; 4100 } else { 4101 goto skip; /* No ATA command to send */ 4102 } 4103 break; 4104 default: /* invalid page code */ 4105 fp = bd_len + hdr_len; 4106 goto invalid_param; 4107 } 4108 4109 /* 4110 * Only one page has changeable data, so we only support setting one 4111 * page at a time. 4112 */ 4113 if (len > pg_len) 4114 goto invalid_param; 4115 4116 return 0; 4117 4118 invalid_fld: 4119 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4120 return 1; 4121 4122 invalid_param: 4123 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4124 return 1; 4125 4126 invalid_param_len: 4127 /* "Parameter list length error" */ 4128 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4129 return 1; 4130 4131 skip: 4132 scmd->result = SAM_STAT_GOOD; 4133 return 1; 4134 } 4135 4136 /** 4137 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4138 * @dev: ATA device 4139 * @cmd: SCSI command opcode to consider 4140 * 4141 * Look up the SCSI command given, and determine whether the 4142 * SCSI command is to be translated or simulated. 4143 * 4144 * RETURNS: 4145 * Pointer to translation function if possible, %NULL if not. 4146 */ 4147 4148 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4149 { 4150 switch (cmd) { 4151 case READ_6: 4152 case READ_10: 4153 case READ_16: 4154 4155 case WRITE_6: 4156 case WRITE_10: 4157 case WRITE_16: 4158 return ata_scsi_rw_xlat; 4159 4160 case WRITE_SAME_16: 4161 return ata_scsi_write_same_xlat; 4162 4163 case SYNCHRONIZE_CACHE: 4164 if (ata_try_flush_cache(dev)) 4165 return ata_scsi_flush_xlat; 4166 break; 4167 4168 case VERIFY: 4169 case VERIFY_16: 4170 return ata_scsi_verify_xlat; 4171 4172 case ATA_12: 4173 case ATA_16: 4174 return ata_scsi_pass_thru; 4175 4176 case MODE_SELECT: 4177 case MODE_SELECT_10: 4178 return ata_scsi_mode_select_xlat; 4179 break; 4180 4181 case ZBC_IN: 4182 return ata_scsi_zbc_in_xlat; 4183 4184 case ZBC_OUT: 4185 return ata_scsi_zbc_out_xlat; 4186 4187 case START_STOP: 4188 return ata_scsi_start_stop_xlat; 4189 } 4190 4191 return NULL; 4192 } 4193 4194 /** 4195 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 4196 * @ap: ATA port to which the command was being sent 4197 * @cmd: SCSI command to dump 4198 * 4199 * Prints the contents of a SCSI command via printk(). 4200 */ 4201 4202 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 4203 struct scsi_cmnd *cmd) 4204 { 4205 #ifdef ATA_DEBUG 4206 struct scsi_device *scsidev = cmd->device; 4207 4208 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n", 4209 ap->print_id, 4210 scsidev->channel, scsidev->id, scsidev->lun, 4211 cmd->cmnd); 4212 #endif 4213 } 4214 4215 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 4216 struct ata_device *dev) 4217 { 4218 u8 scsi_op = scmd->cmnd[0]; 4219 ata_xlat_func_t xlat_func; 4220 int rc = 0; 4221 4222 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4223 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 4224 goto bad_cdb_len; 4225 4226 xlat_func = ata_get_xlat_func(dev, scsi_op); 4227 } else { 4228 if (unlikely(!scmd->cmd_len)) 4229 goto bad_cdb_len; 4230 4231 xlat_func = NULL; 4232 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4233 /* relay SCSI command to ATAPI device */ 4234 int len = COMMAND_SIZE(scsi_op); 4235 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 4236 goto bad_cdb_len; 4237 4238 xlat_func = atapi_xlat; 4239 } else { 4240 /* ATA_16 passthru, treat as an ATA command */ 4241 if (unlikely(scmd->cmd_len > 16)) 4242 goto bad_cdb_len; 4243 4244 xlat_func = ata_get_xlat_func(dev, scsi_op); 4245 } 4246 } 4247 4248 if (xlat_func) 4249 rc = ata_scsi_translate(dev, scmd, xlat_func); 4250 else 4251 ata_scsi_simulate(dev, scmd); 4252 4253 return rc; 4254 4255 bad_cdb_len: 4256 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4257 scmd->cmd_len, scsi_op, dev->cdb_len); 4258 scmd->result = DID_ERROR << 16; 4259 scmd->scsi_done(scmd); 4260 return 0; 4261 } 4262 4263 /** 4264 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4265 * @shost: SCSI host of command to be sent 4266 * @cmd: SCSI command to be sent 4267 * 4268 * In some cases, this function translates SCSI commands into 4269 * ATA taskfiles, and queues the taskfiles to be sent to 4270 * hardware. In other cases, this function simulates a 4271 * SCSI device by evaluating and responding to certain 4272 * SCSI commands. This creates the overall effect of 4273 * ATA and ATAPI devices appearing as SCSI devices. 4274 * 4275 * LOCKING: 4276 * ATA host lock 4277 * 4278 * RETURNS: 4279 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4280 * 0 otherwise. 4281 */ 4282 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4283 { 4284 struct ata_port *ap; 4285 struct ata_device *dev; 4286 struct scsi_device *scsidev = cmd->device; 4287 int rc = 0; 4288 unsigned long irq_flags; 4289 4290 ap = ata_shost_to_port(shost); 4291 4292 spin_lock_irqsave(ap->lock, irq_flags); 4293 4294 ata_scsi_dump_cdb(ap, cmd); 4295 4296 dev = ata_scsi_find_dev(ap, scsidev); 4297 if (likely(dev)) 4298 rc = __ata_scsi_queuecmd(cmd, dev); 4299 else { 4300 cmd->result = (DID_BAD_TARGET << 16); 4301 cmd->scsi_done(cmd); 4302 } 4303 4304 spin_unlock_irqrestore(ap->lock, irq_flags); 4305 4306 return rc; 4307 } 4308 4309 /** 4310 * ata_scsi_simulate - simulate SCSI command on ATA device 4311 * @dev: the target device 4312 * @cmd: SCSI command being sent to device. 4313 * 4314 * Interprets and directly executes a select list of SCSI commands 4315 * that can be handled internally. 4316 * 4317 * LOCKING: 4318 * spin_lock_irqsave(host lock) 4319 */ 4320 4321 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4322 { 4323 struct ata_scsi_args args; 4324 const u8 *scsicmd = cmd->cmnd; 4325 u8 tmp8; 4326 4327 args.dev = dev; 4328 args.id = dev->id; 4329 args.cmd = cmd; 4330 4331 switch(scsicmd[0]) { 4332 case INQUIRY: 4333 if (scsicmd[1] & 2) /* is CmdDt set? */ 4334 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4335 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4336 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4337 else switch (scsicmd[2]) { 4338 case 0x00: 4339 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4340 break; 4341 case 0x80: 4342 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4343 break; 4344 case 0x83: 4345 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4346 break; 4347 case 0x89: 4348 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4349 break; 4350 case 0xb0: 4351 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4352 break; 4353 case 0xb1: 4354 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4355 break; 4356 case 0xb2: 4357 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4358 break; 4359 case 0xb6: 4360 if (dev->flags & ATA_DFLAG_ZAC) { 4361 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4362 break; 4363 } 4364 /* Fallthrough */ 4365 default: 4366 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); 4367 break; 4368 } 4369 break; 4370 4371 case MODE_SENSE: 4372 case MODE_SENSE_10: 4373 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4374 break; 4375 4376 case READ_CAPACITY: 4377 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4378 break; 4379 4380 case SERVICE_ACTION_IN_16: 4381 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4382 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4383 else 4384 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4385 break; 4386 4387 case REPORT_LUNS: 4388 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4389 break; 4390 4391 case REQUEST_SENSE: 4392 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4393 cmd->result = (DRIVER_SENSE << 24); 4394 break; 4395 4396 /* if we reach this, then writeback caching is disabled, 4397 * turning this into a no-op. 4398 */ 4399 case SYNCHRONIZE_CACHE: 4400 /* fall through */ 4401 4402 /* no-op's, complete with success */ 4403 case REZERO_UNIT: 4404 case SEEK_6: 4405 case SEEK_10: 4406 case TEST_UNIT_READY: 4407 break; 4408 4409 case SEND_DIAGNOSTIC: 4410 tmp8 = scsicmd[1] & ~(1 << 3); 4411 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4]) 4412 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4413 break; 4414 4415 case MAINTENANCE_IN: 4416 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4417 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4418 else 4419 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); 4420 break; 4421 4422 /* all other commands */ 4423 default: 4424 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4425 /* "Invalid command operation code" */ 4426 break; 4427 } 4428 4429 cmd->scsi_done(cmd); 4430 } 4431 4432 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4433 { 4434 int i, rc; 4435 4436 for (i = 0; i < host->n_ports; i++) { 4437 struct ata_port *ap = host->ports[i]; 4438 struct Scsi_Host *shost; 4439 4440 rc = -ENOMEM; 4441 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4442 if (!shost) 4443 goto err_alloc; 4444 4445 shost->eh_noresume = 1; 4446 *(struct ata_port **)&shost->hostdata[0] = ap; 4447 ap->scsi_host = shost; 4448 4449 shost->transportt = ata_scsi_transport_template; 4450 shost->unique_id = ap->print_id; 4451 shost->max_id = 16; 4452 shost->max_lun = 1; 4453 shost->max_channel = 1; 4454 shost->max_cmd_len = 16; 4455 4456 /* Schedule policy is determined by ->qc_defer() 4457 * callback and it needs to see every deferred qc. 4458 * Set host_blocked to 1 to prevent SCSI midlayer from 4459 * automatically deferring requests. 4460 */ 4461 shost->max_host_blocked = 1; 4462 4463 rc = scsi_add_host_with_dma(ap->scsi_host, 4464 &ap->tdev, ap->host->dev); 4465 if (rc) 4466 goto err_add; 4467 } 4468 4469 return 0; 4470 4471 err_add: 4472 scsi_host_put(host->ports[i]->scsi_host); 4473 err_alloc: 4474 while (--i >= 0) { 4475 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4476 4477 scsi_remove_host(shost); 4478 scsi_host_put(shost); 4479 } 4480 return rc; 4481 } 4482 4483 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4484 { 4485 int tries = 5; 4486 struct ata_device *last_failed_dev = NULL; 4487 struct ata_link *link; 4488 struct ata_device *dev; 4489 4490 repeat: 4491 ata_for_each_link(link, ap, EDGE) { 4492 ata_for_each_dev(dev, link, ENABLED) { 4493 struct scsi_device *sdev; 4494 int channel = 0, id = 0; 4495 4496 if (dev->sdev) 4497 continue; 4498 4499 if (ata_is_host_link(link)) 4500 id = dev->devno; 4501 else 4502 channel = link->pmp; 4503 4504 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4505 NULL); 4506 if (!IS_ERR(sdev)) { 4507 dev->sdev = sdev; 4508 scsi_device_put(sdev); 4509 } else { 4510 dev->sdev = NULL; 4511 } 4512 } 4513 } 4514 4515 /* If we scanned while EH was in progress or allocation 4516 * failure occurred, scan would have failed silently. Check 4517 * whether all devices are attached. 4518 */ 4519 ata_for_each_link(link, ap, EDGE) { 4520 ata_for_each_dev(dev, link, ENABLED) { 4521 if (!dev->sdev) 4522 goto exit_loop; 4523 } 4524 } 4525 exit_loop: 4526 if (!link) 4527 return; 4528 4529 /* we're missing some SCSI devices */ 4530 if (sync) { 4531 /* If caller requested synchrnous scan && we've made 4532 * any progress, sleep briefly and repeat. 4533 */ 4534 if (dev != last_failed_dev) { 4535 msleep(100); 4536 last_failed_dev = dev; 4537 goto repeat; 4538 } 4539 4540 /* We might be failing to detect boot device, give it 4541 * a few more chances. 4542 */ 4543 if (--tries) { 4544 msleep(100); 4545 goto repeat; 4546 } 4547 4548 ata_port_err(ap, 4549 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4550 } 4551 4552 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4553 round_jiffies_relative(HZ)); 4554 } 4555 4556 /** 4557 * ata_scsi_offline_dev - offline attached SCSI device 4558 * @dev: ATA device to offline attached SCSI device for 4559 * 4560 * This function is called from ata_eh_hotplug() and responsible 4561 * for taking the SCSI device attached to @dev offline. This 4562 * function is called with host lock which protects dev->sdev 4563 * against clearing. 4564 * 4565 * LOCKING: 4566 * spin_lock_irqsave(host lock) 4567 * 4568 * RETURNS: 4569 * 1 if attached SCSI device exists, 0 otherwise. 4570 */ 4571 int ata_scsi_offline_dev(struct ata_device *dev) 4572 { 4573 if (dev->sdev) { 4574 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4575 return 1; 4576 } 4577 return 0; 4578 } 4579 4580 /** 4581 * ata_scsi_remove_dev - remove attached SCSI device 4582 * @dev: ATA device to remove attached SCSI device for 4583 * 4584 * This function is called from ata_eh_scsi_hotplug() and 4585 * responsible for removing the SCSI device attached to @dev. 4586 * 4587 * LOCKING: 4588 * Kernel thread context (may sleep). 4589 */ 4590 static void ata_scsi_remove_dev(struct ata_device *dev) 4591 { 4592 struct ata_port *ap = dev->link->ap; 4593 struct scsi_device *sdev; 4594 unsigned long flags; 4595 4596 /* Alas, we need to grab scan_mutex to ensure SCSI device 4597 * state doesn't change underneath us and thus 4598 * scsi_device_get() always succeeds. The mutex locking can 4599 * be removed if there is __scsi_device_get() interface which 4600 * increments reference counts regardless of device state. 4601 */ 4602 mutex_lock(&ap->scsi_host->scan_mutex); 4603 spin_lock_irqsave(ap->lock, flags); 4604 4605 /* clearing dev->sdev is protected by host lock */ 4606 sdev = dev->sdev; 4607 dev->sdev = NULL; 4608 4609 if (sdev) { 4610 /* If user initiated unplug races with us, sdev can go 4611 * away underneath us after the host lock and 4612 * scan_mutex are released. Hold onto it. 4613 */ 4614 if (scsi_device_get(sdev) == 0) { 4615 /* The following ensures the attached sdev is 4616 * offline on return from ata_scsi_offline_dev() 4617 * regardless it wins or loses the race 4618 * against this function. 4619 */ 4620 scsi_device_set_state(sdev, SDEV_OFFLINE); 4621 } else { 4622 WARN_ON(1); 4623 sdev = NULL; 4624 } 4625 } 4626 4627 spin_unlock_irqrestore(ap->lock, flags); 4628 mutex_unlock(&ap->scsi_host->scan_mutex); 4629 4630 if (sdev) { 4631 ata_dev_info(dev, "detaching (SCSI %s)\n", 4632 dev_name(&sdev->sdev_gendev)); 4633 4634 scsi_remove_device(sdev); 4635 scsi_device_put(sdev); 4636 } 4637 } 4638 4639 static void ata_scsi_handle_link_detach(struct ata_link *link) 4640 { 4641 struct ata_port *ap = link->ap; 4642 struct ata_device *dev; 4643 4644 ata_for_each_dev(dev, link, ALL) { 4645 unsigned long flags; 4646 4647 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4648 continue; 4649 4650 spin_lock_irqsave(ap->lock, flags); 4651 dev->flags &= ~ATA_DFLAG_DETACHED; 4652 spin_unlock_irqrestore(ap->lock, flags); 4653 4654 if (zpodd_dev_enabled(dev)) 4655 zpodd_exit(dev); 4656 4657 ata_scsi_remove_dev(dev); 4658 } 4659 } 4660 4661 /** 4662 * ata_scsi_media_change_notify - send media change event 4663 * @dev: Pointer to the disk device with media change event 4664 * 4665 * Tell the block layer to send a media change notification 4666 * event. 4667 * 4668 * LOCKING: 4669 * spin_lock_irqsave(host lock) 4670 */ 4671 void ata_scsi_media_change_notify(struct ata_device *dev) 4672 { 4673 if (dev->sdev) 4674 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4675 GFP_ATOMIC); 4676 } 4677 4678 /** 4679 * ata_scsi_hotplug - SCSI part of hotplug 4680 * @work: Pointer to ATA port to perform SCSI hotplug on 4681 * 4682 * Perform SCSI part of hotplug. It's executed from a separate 4683 * workqueue after EH completes. This is necessary because SCSI 4684 * hot plugging requires working EH and hot unplugging is 4685 * synchronized with hot plugging with a mutex. 4686 * 4687 * LOCKING: 4688 * Kernel thread context (may sleep). 4689 */ 4690 void ata_scsi_hotplug(struct work_struct *work) 4691 { 4692 struct ata_port *ap = 4693 container_of(work, struct ata_port, hotplug_task.work); 4694 int i; 4695 4696 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4697 DPRINTK("ENTER/EXIT - unloading\n"); 4698 return; 4699 } 4700 4701 /* 4702 * XXX - UGLY HACK 4703 * 4704 * The block layer suspend/resume path is fundamentally broken due 4705 * to freezable kthreads and workqueue and may deadlock if a block 4706 * device gets removed while resume is in progress. I don't know 4707 * what the solution is short of removing freezable kthreads and 4708 * workqueues altogether. 4709 * 4710 * The following is an ugly hack to avoid kicking off device 4711 * removal while freezer is active. This is a joke but does avoid 4712 * this particular deadlock scenario. 4713 * 4714 * https://bugzilla.kernel.org/show_bug.cgi?id=62801 4715 * http://marc.info/?l=linux-kernel&m=138695698516487 4716 */ 4717 #ifdef CONFIG_FREEZER 4718 while (pm_freezing) 4719 msleep(10); 4720 #endif 4721 4722 DPRINTK("ENTER\n"); 4723 mutex_lock(&ap->scsi_scan_mutex); 4724 4725 /* Unplug detached devices. We cannot use link iterator here 4726 * because PMP links have to be scanned even if PMP is 4727 * currently not attached. Iterate manually. 4728 */ 4729 ata_scsi_handle_link_detach(&ap->link); 4730 if (ap->pmp_link) 4731 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4732 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4733 4734 /* scan for new ones */ 4735 ata_scsi_scan_host(ap, 0); 4736 4737 mutex_unlock(&ap->scsi_scan_mutex); 4738 DPRINTK("EXIT\n"); 4739 } 4740 4741 /** 4742 * ata_scsi_user_scan - indication for user-initiated bus scan 4743 * @shost: SCSI host to scan 4744 * @channel: Channel to scan 4745 * @id: ID to scan 4746 * @lun: LUN to scan 4747 * 4748 * This function is called when user explicitly requests bus 4749 * scan. Set probe pending flag and invoke EH. 4750 * 4751 * LOCKING: 4752 * SCSI layer (we don't care) 4753 * 4754 * RETURNS: 4755 * Zero. 4756 */ 4757 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4758 unsigned int id, u64 lun) 4759 { 4760 struct ata_port *ap = ata_shost_to_port(shost); 4761 unsigned long flags; 4762 int devno, rc = 0; 4763 4764 if (!ap->ops->error_handler) 4765 return -EOPNOTSUPP; 4766 4767 if (lun != SCAN_WILD_CARD && lun) 4768 return -EINVAL; 4769 4770 if (!sata_pmp_attached(ap)) { 4771 if (channel != SCAN_WILD_CARD && channel) 4772 return -EINVAL; 4773 devno = id; 4774 } else { 4775 if (id != SCAN_WILD_CARD && id) 4776 return -EINVAL; 4777 devno = channel; 4778 } 4779 4780 spin_lock_irqsave(ap->lock, flags); 4781 4782 if (devno == SCAN_WILD_CARD) { 4783 struct ata_link *link; 4784 4785 ata_for_each_link(link, ap, EDGE) { 4786 struct ata_eh_info *ehi = &link->eh_info; 4787 ehi->probe_mask |= ATA_ALL_DEVICES; 4788 ehi->action |= ATA_EH_RESET; 4789 } 4790 } else { 4791 struct ata_device *dev = ata_find_dev(ap, devno); 4792 4793 if (dev) { 4794 struct ata_eh_info *ehi = &dev->link->eh_info; 4795 ehi->probe_mask |= 1 << dev->devno; 4796 ehi->action |= ATA_EH_RESET; 4797 } else 4798 rc = -EINVAL; 4799 } 4800 4801 if (rc == 0) { 4802 ata_port_schedule_eh(ap); 4803 spin_unlock_irqrestore(ap->lock, flags); 4804 ata_port_wait_eh(ap); 4805 } else 4806 spin_unlock_irqrestore(ap->lock, flags); 4807 4808 return rc; 4809 } 4810 4811 /** 4812 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4813 * @work: Pointer to ATA port to perform scsi_rescan_device() 4814 * 4815 * After ATA pass thru (SAT) commands are executed successfully, 4816 * libata need to propagate the changes to SCSI layer. 4817 * 4818 * LOCKING: 4819 * Kernel thread context (may sleep). 4820 */ 4821 void ata_scsi_dev_rescan(struct work_struct *work) 4822 { 4823 struct ata_port *ap = 4824 container_of(work, struct ata_port, scsi_rescan_task); 4825 struct ata_link *link; 4826 struct ata_device *dev; 4827 unsigned long flags; 4828 4829 mutex_lock(&ap->scsi_scan_mutex); 4830 spin_lock_irqsave(ap->lock, flags); 4831 4832 ata_for_each_link(link, ap, EDGE) { 4833 ata_for_each_dev(dev, link, ENABLED) { 4834 struct scsi_device *sdev = dev->sdev; 4835 4836 if (!sdev) 4837 continue; 4838 if (scsi_device_get(sdev)) 4839 continue; 4840 4841 spin_unlock_irqrestore(ap->lock, flags); 4842 scsi_rescan_device(&(sdev->sdev_gendev)); 4843 scsi_device_put(sdev); 4844 spin_lock_irqsave(ap->lock, flags); 4845 } 4846 } 4847 4848 spin_unlock_irqrestore(ap->lock, flags); 4849 mutex_unlock(&ap->scsi_scan_mutex); 4850 } 4851 4852 /** 4853 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 4854 * @host: ATA host container for all SAS ports 4855 * @port_info: Information from low-level host driver 4856 * @shost: SCSI host that the scsi device is attached to 4857 * 4858 * LOCKING: 4859 * PCI/etc. bus probe sem. 4860 * 4861 * RETURNS: 4862 * ata_port pointer on success / NULL on failure. 4863 */ 4864 4865 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 4866 struct ata_port_info *port_info, 4867 struct Scsi_Host *shost) 4868 { 4869 struct ata_port *ap; 4870 4871 ap = ata_port_alloc(host); 4872 if (!ap) 4873 return NULL; 4874 4875 ap->port_no = 0; 4876 ap->lock = &host->lock; 4877 ap->pio_mask = port_info->pio_mask; 4878 ap->mwdma_mask = port_info->mwdma_mask; 4879 ap->udma_mask = port_info->udma_mask; 4880 ap->flags |= port_info->flags; 4881 ap->ops = port_info->port_ops; 4882 ap->cbl = ATA_CBL_SATA; 4883 4884 return ap; 4885 } 4886 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 4887 4888 /** 4889 * ata_sas_port_start - Set port up for dma. 4890 * @ap: Port to initialize 4891 * 4892 * Called just after data structures for each port are 4893 * initialized. 4894 * 4895 * May be used as the port_start() entry in ata_port_operations. 4896 * 4897 * LOCKING: 4898 * Inherited from caller. 4899 */ 4900 int ata_sas_port_start(struct ata_port *ap) 4901 { 4902 /* 4903 * the port is marked as frozen at allocation time, but if we don't 4904 * have new eh, we won't thaw it 4905 */ 4906 if (!ap->ops->error_handler) 4907 ap->pflags &= ~ATA_PFLAG_FROZEN; 4908 return 0; 4909 } 4910 EXPORT_SYMBOL_GPL(ata_sas_port_start); 4911 4912 /** 4913 * ata_port_stop - Undo ata_sas_port_start() 4914 * @ap: Port to shut down 4915 * 4916 * May be used as the port_stop() entry in ata_port_operations. 4917 * 4918 * LOCKING: 4919 * Inherited from caller. 4920 */ 4921 4922 void ata_sas_port_stop(struct ata_port *ap) 4923 { 4924 } 4925 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 4926 4927 /** 4928 * ata_sas_async_probe - simply schedule probing and return 4929 * @ap: Port to probe 4930 * 4931 * For batch scheduling of probe for sas attached ata devices, assumes 4932 * the port has already been through ata_sas_port_init() 4933 */ 4934 void ata_sas_async_probe(struct ata_port *ap) 4935 { 4936 __ata_port_probe(ap); 4937 } 4938 EXPORT_SYMBOL_GPL(ata_sas_async_probe); 4939 4940 int ata_sas_sync_probe(struct ata_port *ap) 4941 { 4942 return ata_port_probe(ap); 4943 } 4944 EXPORT_SYMBOL_GPL(ata_sas_sync_probe); 4945 4946 4947 /** 4948 * ata_sas_port_init - Initialize a SATA device 4949 * @ap: SATA port to initialize 4950 * 4951 * LOCKING: 4952 * PCI/etc. bus probe sem. 4953 * 4954 * RETURNS: 4955 * Zero on success, non-zero on error. 4956 */ 4957 4958 int ata_sas_port_init(struct ata_port *ap) 4959 { 4960 int rc = ap->ops->port_start(ap); 4961 4962 if (rc) 4963 return rc; 4964 ap->print_id = atomic_inc_return(&ata_print_id); 4965 return 0; 4966 } 4967 EXPORT_SYMBOL_GPL(ata_sas_port_init); 4968 4969 /** 4970 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 4971 * @ap: SATA port to destroy 4972 * 4973 */ 4974 4975 void ata_sas_port_destroy(struct ata_port *ap) 4976 { 4977 if (ap->ops->port_stop) 4978 ap->ops->port_stop(ap); 4979 kfree(ap); 4980 } 4981 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 4982 4983 /** 4984 * ata_sas_slave_configure - Default slave_config routine for libata devices 4985 * @sdev: SCSI device to configure 4986 * @ap: ATA port to which SCSI device is attached 4987 * 4988 * RETURNS: 4989 * Zero. 4990 */ 4991 4992 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 4993 { 4994 ata_scsi_sdev_config(sdev); 4995 ata_scsi_dev_config(sdev, ap->link.device); 4996 return 0; 4997 } 4998 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 4999 5000 /** 5001 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 5002 * @cmd: SCSI command to be sent 5003 * @ap: ATA port to which the command is being sent 5004 * 5005 * RETURNS: 5006 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 5007 * 0 otherwise. 5008 */ 5009 5010 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 5011 { 5012 int rc = 0; 5013 5014 ata_scsi_dump_cdb(ap, cmd); 5015 5016 if (likely(ata_dev_enabled(ap->link.device))) 5017 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 5018 else { 5019 cmd->result = (DID_BAD_TARGET << 16); 5020 cmd->scsi_done(cmd); 5021 } 5022 return rc; 5023 } 5024 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 5025 5026 int ata_sas_allocate_tag(struct ata_port *ap) 5027 { 5028 unsigned int max_queue = ap->host->n_tags; 5029 unsigned int i, tag; 5030 5031 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) { 5032 tag = tag < max_queue ? tag : 0; 5033 5034 /* the last tag is reserved for internal command. */ 5035 if (tag == ATA_TAG_INTERNAL) 5036 continue; 5037 5038 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) { 5039 ap->sas_last_tag = tag; 5040 return tag; 5041 } 5042 } 5043 return -1; 5044 } 5045 5046 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) 5047 { 5048 clear_bit(tag, &ap->sas_tag_allocated); 5049 } 5050