1 /* 2 * libata-scsi.c - helper library for ATA 3 * 4 * Maintained by: Jeff Garzik <jgarzik@pobox.com> 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 <scsi/scsi.h> 41 #include <scsi/scsi_host.h> 42 #include <scsi/scsi_cmnd.h> 43 #include <scsi/scsi_eh.h> 44 #include <scsi/scsi_device.h> 45 #include <scsi/scsi_tcq.h> 46 #include <scsi/scsi_transport.h> 47 #include <linux/libata.h> 48 #include <linux/hdreg.h> 49 #include <linux/uaccess.h> 50 #include <linux/suspend.h> 51 #include <asm/unaligned.h> 52 53 #include "libata.h" 54 #include "libata-transport.h" 55 56 #define ATA_SCSI_RBUF_SIZE 4096 57 58 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 59 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 60 61 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 62 63 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 64 const struct scsi_device *scsidev); 65 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, 66 const struct scsi_device *scsidev); 67 68 #define RW_RECOVERY_MPAGE 0x1 69 #define RW_RECOVERY_MPAGE_LEN 12 70 #define CACHE_MPAGE 0x8 71 #define CACHE_MPAGE_LEN 20 72 #define CONTROL_MPAGE 0xa 73 #define CONTROL_MPAGE_LEN 12 74 #define ALL_MPAGES 0x3f 75 #define ALL_SUB_MPAGES 0xff 76 77 78 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 79 RW_RECOVERY_MPAGE, 80 RW_RECOVERY_MPAGE_LEN - 2, 81 (1 << 7), /* AWRE */ 82 0, /* read retry count */ 83 0, 0, 0, 0, 84 0, /* write retry count */ 85 0, 0, 0 86 }; 87 88 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 89 CACHE_MPAGE, 90 CACHE_MPAGE_LEN - 2, 91 0, /* contains WCE, needs to be 0 for logic */ 92 0, 0, 0, 0, 0, 0, 0, 0, 0, 93 0, /* contains DRA, needs to be 0 for logic */ 94 0, 0, 0, 0, 0, 0, 0 95 }; 96 97 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 98 CONTROL_MPAGE, 99 CONTROL_MPAGE_LEN - 2, 100 2, /* DSENSE=0, GLTSD=1 */ 101 0, /* [QAM+QERR may be 1, see 05-359r1] */ 102 0, 0, 0, 0, 0xff, 0xff, 103 0, 30 /* extended self test time, see 05-359r1 */ 104 }; 105 106 static const char *ata_lpm_policy_names[] = { 107 [ATA_LPM_UNKNOWN] = "max_performance", 108 [ATA_LPM_MAX_POWER] = "max_performance", 109 [ATA_LPM_MED_POWER] = "medium_power", 110 [ATA_LPM_MIN_POWER] = "min_power", 111 }; 112 113 static ssize_t ata_scsi_lpm_store(struct device *dev, 114 struct device_attribute *attr, 115 const char *buf, size_t count) 116 { 117 struct Scsi_Host *shost = class_to_shost(dev); 118 struct ata_port *ap = ata_shost_to_port(shost); 119 enum ata_lpm_policy policy; 120 unsigned long flags; 121 122 /* UNKNOWN is internal state, iterate from MAX_POWER */ 123 for (policy = ATA_LPM_MAX_POWER; 124 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) { 125 const char *name = ata_lpm_policy_names[policy]; 126 127 if (strncmp(name, buf, strlen(name)) == 0) 128 break; 129 } 130 if (policy == ARRAY_SIZE(ata_lpm_policy_names)) 131 return -EINVAL; 132 133 spin_lock_irqsave(ap->lock, flags); 134 ap->target_lpm_policy = policy; 135 ata_port_schedule_eh(ap); 136 spin_unlock_irqrestore(ap->lock, flags); 137 138 return count; 139 } 140 141 static ssize_t ata_scsi_lpm_show(struct device *dev, 142 struct device_attribute *attr, char *buf) 143 { 144 struct Scsi_Host *shost = class_to_shost(dev); 145 struct ata_port *ap = ata_shost_to_port(shost); 146 147 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names)) 148 return -EINVAL; 149 150 return snprintf(buf, PAGE_SIZE, "%s\n", 151 ata_lpm_policy_names[ap->target_lpm_policy]); 152 } 153 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, 154 ata_scsi_lpm_show, ata_scsi_lpm_store); 155 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); 156 157 static ssize_t ata_scsi_park_show(struct device *device, 158 struct device_attribute *attr, char *buf) 159 { 160 struct scsi_device *sdev = to_scsi_device(device); 161 struct ata_port *ap; 162 struct ata_link *link; 163 struct ata_device *dev; 164 unsigned long flags, now; 165 unsigned int uninitialized_var(msecs); 166 int rc = 0; 167 168 ap = ata_shost_to_port(sdev->host); 169 170 spin_lock_irqsave(ap->lock, flags); 171 dev = ata_scsi_find_dev(ap, sdev); 172 if (!dev) { 173 rc = -ENODEV; 174 goto unlock; 175 } 176 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 177 rc = -EOPNOTSUPP; 178 goto unlock; 179 } 180 181 link = dev->link; 182 now = jiffies; 183 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 184 link->eh_context.unloaded_mask & (1 << dev->devno) && 185 time_after(dev->unpark_deadline, now)) 186 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 187 else 188 msecs = 0; 189 190 unlock: 191 spin_unlock_irq(ap->lock); 192 193 return rc ? rc : snprintf(buf, 20, "%u\n", msecs); 194 } 195 196 static ssize_t ata_scsi_park_store(struct device *device, 197 struct device_attribute *attr, 198 const char *buf, size_t len) 199 { 200 struct scsi_device *sdev = to_scsi_device(device); 201 struct ata_port *ap; 202 struct ata_device *dev; 203 long int input; 204 unsigned long flags; 205 int rc; 206 207 rc = strict_strtol(buf, 10, &input); 208 if (rc || input < -2) 209 return -EINVAL; 210 if (input > ATA_TMOUT_MAX_PARK) { 211 rc = -EOVERFLOW; 212 input = ATA_TMOUT_MAX_PARK; 213 } 214 215 ap = ata_shost_to_port(sdev->host); 216 217 spin_lock_irqsave(ap->lock, flags); 218 dev = ata_scsi_find_dev(ap, sdev); 219 if (unlikely(!dev)) { 220 rc = -ENODEV; 221 goto unlock; 222 } 223 if (dev->class != ATA_DEV_ATA) { 224 rc = -EOPNOTSUPP; 225 goto unlock; 226 } 227 228 if (input >= 0) { 229 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 230 rc = -EOPNOTSUPP; 231 goto unlock; 232 } 233 234 dev->unpark_deadline = ata_deadline(jiffies, input); 235 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 236 ata_port_schedule_eh(ap); 237 complete(&ap->park_req_pending); 238 } else { 239 switch (input) { 240 case -1: 241 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 242 break; 243 case -2: 244 dev->flags |= ATA_DFLAG_NO_UNLOAD; 245 break; 246 } 247 } 248 unlock: 249 spin_unlock_irqrestore(ap->lock, flags); 250 251 return rc ? rc : len; 252 } 253 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 254 ata_scsi_park_show, ata_scsi_park_store); 255 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 256 257 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) 258 { 259 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 260 261 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq); 262 } 263 264 static ssize_t 265 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, 266 const char *buf, size_t count) 267 { 268 struct Scsi_Host *shost = class_to_shost(dev); 269 struct ata_port *ap = ata_shost_to_port(shost); 270 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) 271 return ap->ops->em_store(ap, buf, count); 272 return -EINVAL; 273 } 274 275 static ssize_t 276 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, 277 char *buf) 278 { 279 struct Scsi_Host *shost = class_to_shost(dev); 280 struct ata_port *ap = ata_shost_to_port(shost); 281 282 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) 283 return ap->ops->em_show(ap, buf); 284 return -EINVAL; 285 } 286 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, 287 ata_scsi_em_message_show, ata_scsi_em_message_store); 288 EXPORT_SYMBOL_GPL(dev_attr_em_message); 289 290 static ssize_t 291 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, 292 char *buf) 293 { 294 struct Scsi_Host *shost = class_to_shost(dev); 295 struct ata_port *ap = ata_shost_to_port(shost); 296 297 return snprintf(buf, 23, "%d\n", ap->em_message_type); 298 } 299 DEVICE_ATTR(em_message_type, S_IRUGO, 300 ata_scsi_em_message_type_show, NULL); 301 EXPORT_SYMBOL_GPL(dev_attr_em_message_type); 302 303 static ssize_t 304 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, 305 char *buf) 306 { 307 struct scsi_device *sdev = to_scsi_device(dev); 308 struct ata_port *ap = ata_shost_to_port(sdev->host); 309 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 310 311 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY)) 312 return ap->ops->sw_activity_show(atadev, buf); 313 return -EINVAL; 314 } 315 316 static ssize_t 317 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, 318 const char *buf, size_t count) 319 { 320 struct scsi_device *sdev = to_scsi_device(dev); 321 struct ata_port *ap = ata_shost_to_port(sdev->host); 322 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 323 enum sw_activity val; 324 int rc; 325 326 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) { 327 val = simple_strtoul(buf, NULL, 0); 328 switch (val) { 329 case OFF: case BLINK_ON: case BLINK_OFF: 330 rc = ap->ops->sw_activity_store(atadev, val); 331 if (!rc) 332 return count; 333 else 334 return rc; 335 } 336 } 337 return -EINVAL; 338 } 339 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, 340 ata_scsi_activity_store); 341 EXPORT_SYMBOL_GPL(dev_attr_sw_activity); 342 343 struct device_attribute *ata_common_sdev_attrs[] = { 344 &dev_attr_unload_heads, 345 NULL 346 }; 347 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); 348 349 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd) 350 { 351 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); 352 /* "Invalid field in cbd" */ 353 cmd->scsi_done(cmd); 354 } 355 356 /** 357 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 358 * @sdev: SCSI device for which BIOS geometry is to be determined 359 * @bdev: block device associated with @sdev 360 * @capacity: capacity of SCSI device 361 * @geom: location to which geometry will be output 362 * 363 * Generic bios head/sector/cylinder calculator 364 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 365 * mapping. Some situations may arise where the disk is not 366 * bootable if this is not used. 367 * 368 * LOCKING: 369 * Defined by the SCSI layer. We don't really care. 370 * 371 * RETURNS: 372 * Zero. 373 */ 374 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 375 sector_t capacity, int geom[]) 376 { 377 geom[0] = 255; 378 geom[1] = 63; 379 sector_div(capacity, 255*63); 380 geom[2] = capacity; 381 382 return 0; 383 } 384 385 /** 386 * ata_scsi_unlock_native_capacity - unlock native capacity 387 * @sdev: SCSI device to adjust device capacity for 388 * 389 * This function is called if a partition on @sdev extends beyond 390 * the end of the device. It requests EH to unlock HPA. 391 * 392 * LOCKING: 393 * Defined by the SCSI layer. Might sleep. 394 */ 395 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 396 { 397 struct ata_port *ap = ata_shost_to_port(sdev->host); 398 struct ata_device *dev; 399 unsigned long flags; 400 401 spin_lock_irqsave(ap->lock, flags); 402 403 dev = ata_scsi_find_dev(ap, sdev); 404 if (dev && dev->n_sectors < dev->n_native_sectors) { 405 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 406 dev->link->eh_info.action |= ATA_EH_RESET; 407 ata_port_schedule_eh(ap); 408 } 409 410 spin_unlock_irqrestore(ap->lock, flags); 411 ata_port_wait_eh(ap); 412 } 413 414 /** 415 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 416 * @ap: target port 417 * @sdev: SCSI device to get identify data for 418 * @arg: User buffer area for identify data 419 * 420 * LOCKING: 421 * Defined by the SCSI layer. We don't really care. 422 * 423 * RETURNS: 424 * Zero on success, negative errno on error. 425 */ 426 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 427 void __user *arg) 428 { 429 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 430 u16 __user *dst = arg; 431 char buf[40]; 432 433 if (!dev) 434 return -ENOMSG; 435 436 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 437 return -EFAULT; 438 439 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 440 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 441 return -EFAULT; 442 443 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 444 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 445 return -EFAULT; 446 447 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 448 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 449 return -EFAULT; 450 451 return 0; 452 } 453 454 /** 455 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 456 * @scsidev: Device to which we are issuing command 457 * @arg: User provided data for issuing command 458 * 459 * LOCKING: 460 * Defined by the SCSI layer. We don't really care. 461 * 462 * RETURNS: 463 * Zero on success, negative errno on error. 464 */ 465 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 466 { 467 int rc = 0; 468 u8 scsi_cmd[MAX_COMMAND_SIZE]; 469 u8 args[4], *argbuf = NULL, *sensebuf = NULL; 470 int argsize = 0; 471 enum dma_data_direction data_dir; 472 int cmd_result; 473 474 if (arg == NULL) 475 return -EINVAL; 476 477 if (copy_from_user(args, arg, sizeof(args))) 478 return -EFAULT; 479 480 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 481 if (!sensebuf) 482 return -ENOMEM; 483 484 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 485 486 if (args[3]) { 487 argsize = ATA_SECT_SIZE * args[3]; 488 argbuf = kmalloc(argsize, GFP_KERNEL); 489 if (argbuf == NULL) { 490 rc = -ENOMEM; 491 goto error; 492 } 493 494 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 495 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 496 block count in sector count field */ 497 data_dir = DMA_FROM_DEVICE; 498 } else { 499 scsi_cmd[1] = (3 << 1); /* Non-data */ 500 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 501 data_dir = DMA_NONE; 502 } 503 504 scsi_cmd[0] = ATA_16; 505 506 scsi_cmd[4] = args[2]; 507 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 508 scsi_cmd[6] = args[3]; 509 scsi_cmd[8] = args[1]; 510 scsi_cmd[10] = 0x4f; 511 scsi_cmd[12] = 0xc2; 512 } else { 513 scsi_cmd[6] = args[1]; 514 } 515 scsi_cmd[14] = args[0]; 516 517 /* Good values for timeout and retries? Values below 518 from scsi_ioctl_send_command() for default case... */ 519 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 520 sensebuf, (10*HZ), 5, 0, NULL); 521 522 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 523 u8 *desc = sensebuf + 8; 524 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 525 526 /* If we set cc then ATA pass-through will cause a 527 * check condition even if no error. Filter that. */ 528 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 529 struct scsi_sense_hdr sshdr; 530 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 531 &sshdr); 532 if (sshdr.sense_key == 0 && 533 sshdr.asc == 0 && sshdr.ascq == 0) 534 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 535 } 536 537 /* Send userspace a few ATA registers (same as drivers/ide) */ 538 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 539 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 540 args[0] = desc[13]; /* status */ 541 args[1] = desc[3]; /* error */ 542 args[2] = desc[5]; /* sector count (0:7) */ 543 if (copy_to_user(arg, args, sizeof(args))) 544 rc = -EFAULT; 545 } 546 } 547 548 549 if (cmd_result) { 550 rc = -EIO; 551 goto error; 552 } 553 554 if ((argbuf) 555 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 556 rc = -EFAULT; 557 error: 558 kfree(sensebuf); 559 kfree(argbuf); 560 return rc; 561 } 562 563 /** 564 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 565 * @scsidev: Device to which we are issuing command 566 * @arg: User provided data for issuing command 567 * 568 * LOCKING: 569 * Defined by the SCSI layer. We don't really care. 570 * 571 * RETURNS: 572 * Zero on success, negative errno on error. 573 */ 574 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 575 { 576 int rc = 0; 577 u8 scsi_cmd[MAX_COMMAND_SIZE]; 578 u8 args[7], *sensebuf = NULL; 579 int cmd_result; 580 581 if (arg == NULL) 582 return -EINVAL; 583 584 if (copy_from_user(args, arg, sizeof(args))) 585 return -EFAULT; 586 587 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 588 if (!sensebuf) 589 return -ENOMEM; 590 591 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 592 scsi_cmd[0] = ATA_16; 593 scsi_cmd[1] = (3 << 1); /* Non-data */ 594 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 595 scsi_cmd[4] = args[1]; 596 scsi_cmd[6] = args[2]; 597 scsi_cmd[8] = args[3]; 598 scsi_cmd[10] = args[4]; 599 scsi_cmd[12] = args[5]; 600 scsi_cmd[13] = args[6] & 0x4f; 601 scsi_cmd[14] = args[0]; 602 603 /* Good values for timeout and retries? Values below 604 from scsi_ioctl_send_command() for default case... */ 605 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 606 sensebuf, (10*HZ), 5, 0, NULL); 607 608 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 609 u8 *desc = sensebuf + 8; 610 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 611 612 /* If we set cc then ATA pass-through will cause a 613 * check condition even if no error. Filter that. */ 614 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 615 struct scsi_sense_hdr sshdr; 616 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 617 &sshdr); 618 if (sshdr.sense_key == 0 && 619 sshdr.asc == 0 && sshdr.ascq == 0) 620 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 621 } 622 623 /* Send userspace ATA registers */ 624 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 625 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 626 args[0] = desc[13]; /* status */ 627 args[1] = desc[3]; /* error */ 628 args[2] = desc[5]; /* sector count (0:7) */ 629 args[3] = desc[7]; /* lbal */ 630 args[4] = desc[9]; /* lbam */ 631 args[5] = desc[11]; /* lbah */ 632 args[6] = desc[12]; /* select */ 633 if (copy_to_user(arg, args, sizeof(args))) 634 rc = -EFAULT; 635 } 636 } 637 638 if (cmd_result) { 639 rc = -EIO; 640 goto error; 641 } 642 643 error: 644 kfree(sensebuf); 645 return rc; 646 } 647 648 static int ata_ioc32(struct ata_port *ap) 649 { 650 if (ap->flags & ATA_FLAG_PIO_DMA) 651 return 1; 652 if (ap->pflags & ATA_PFLAG_PIO32) 653 return 1; 654 return 0; 655 } 656 657 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 658 int cmd, void __user *arg) 659 { 660 int val = -EINVAL, rc = -EINVAL; 661 unsigned long flags; 662 663 switch (cmd) { 664 case ATA_IOC_GET_IO32: 665 spin_lock_irqsave(ap->lock, flags); 666 val = ata_ioc32(ap); 667 spin_unlock_irqrestore(ap->lock, flags); 668 if (copy_to_user(arg, &val, 1)) 669 return -EFAULT; 670 return 0; 671 672 case ATA_IOC_SET_IO32: 673 val = (unsigned long) arg; 674 rc = 0; 675 spin_lock_irqsave(ap->lock, flags); 676 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 677 if (val) 678 ap->pflags |= ATA_PFLAG_PIO32; 679 else 680 ap->pflags &= ~ATA_PFLAG_PIO32; 681 } else { 682 if (val != ata_ioc32(ap)) 683 rc = -EINVAL; 684 } 685 spin_unlock_irqrestore(ap->lock, flags); 686 return rc; 687 688 case HDIO_GET_IDENTITY: 689 return ata_get_identity(ap, scsidev, arg); 690 691 case HDIO_DRIVE_CMD: 692 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 693 return -EACCES; 694 return ata_cmd_ioctl(scsidev, arg); 695 696 case HDIO_DRIVE_TASK: 697 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 698 return -EACCES; 699 return ata_task_ioctl(scsidev, arg); 700 701 default: 702 rc = -ENOTTY; 703 break; 704 } 705 706 return rc; 707 } 708 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 709 710 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) 711 { 712 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 713 scsidev, cmd, arg); 714 } 715 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 716 717 /** 718 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 719 * @dev: ATA device to which the new command is attached 720 * @cmd: SCSI command that originated this ATA command 721 * 722 * Obtain a reference to an unused ata_queued_cmd structure, 723 * which is the basic libata structure representing a single 724 * ATA command sent to the hardware. 725 * 726 * If a command was available, fill in the SCSI-specific 727 * portions of the structure with information on the 728 * current command. 729 * 730 * LOCKING: 731 * spin_lock_irqsave(host lock) 732 * 733 * RETURNS: 734 * Command allocated, or %NULL if none available. 735 */ 736 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 737 struct scsi_cmnd *cmd) 738 { 739 struct ata_queued_cmd *qc; 740 741 qc = ata_qc_new_init(dev); 742 if (qc) { 743 qc->scsicmd = cmd; 744 qc->scsidone = cmd->scsi_done; 745 746 qc->sg = scsi_sglist(cmd); 747 qc->n_elem = scsi_sg_count(cmd); 748 } else { 749 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 750 cmd->scsi_done(cmd); 751 } 752 753 return qc; 754 } 755 756 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 757 { 758 struct scsi_cmnd *scmd = qc->scsicmd; 759 760 qc->extrabytes = scmd->request->extra_len; 761 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 762 } 763 764 /** 765 * ata_dump_status - user friendly display of error info 766 * @id: id of the port in question 767 * @tf: ptr to filled out taskfile 768 * 769 * Decode and dump the ATA error/status registers for the user so 770 * that they have some idea what really happened at the non 771 * make-believe layer. 772 * 773 * LOCKING: 774 * inherited from caller 775 */ 776 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 777 { 778 u8 stat = tf->command, err = tf->feature; 779 780 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); 781 if (stat & ATA_BUSY) { 782 printk("Busy }\n"); /* Data is not valid in this case */ 783 } else { 784 if (stat & 0x40) printk("DriveReady "); 785 if (stat & 0x20) printk("DeviceFault "); 786 if (stat & 0x10) printk("SeekComplete "); 787 if (stat & 0x08) printk("DataRequest "); 788 if (stat & 0x04) printk("CorrectedError "); 789 if (stat & 0x02) printk("Index "); 790 if (stat & 0x01) printk("Error "); 791 printk("}\n"); 792 793 if (err) { 794 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); 795 if (err & 0x04) printk("DriveStatusError "); 796 if (err & 0x80) { 797 if (err & 0x04) printk("BadCRC "); 798 else printk("Sector "); 799 } 800 if (err & 0x40) printk("UncorrectableError "); 801 if (err & 0x10) printk("SectorIdNotFound "); 802 if (err & 0x02) printk("TrackZeroNotFound "); 803 if (err & 0x01) printk("AddrMarkNotFound "); 804 printk("}\n"); 805 } 806 } 807 } 808 809 /** 810 * ata_to_sense_error - convert ATA error to SCSI error 811 * @id: ATA device number 812 * @drv_stat: value contained in ATA status register 813 * @drv_err: value contained in ATA error register 814 * @sk: the sense key we'll fill out 815 * @asc: the additional sense code we'll fill out 816 * @ascq: the additional sense code qualifier we'll fill out 817 * @verbose: be verbose 818 * 819 * Converts an ATA error into a SCSI error. Fill out pointers to 820 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 821 * format sense blocks. 822 * 823 * LOCKING: 824 * spin_lock_irqsave(host lock) 825 */ 826 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 827 u8 *asc, u8 *ascq, int verbose) 828 { 829 int i; 830 831 /* Based on the 3ware driver translation table */ 832 static const unsigned char sense_table[][4] = { 833 /* BBD|ECC|ID|MAR */ 834 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command 835 /* BBD|ECC|ID */ 836 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command 837 /* ECC|MC|MARK */ 838 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error 839 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 840 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error 841 /* MC|ID|ABRT|TRK0|MARK */ 842 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready 843 /* MCR|MARK */ 844 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready 845 /* Bad address mark */ 846 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field 847 /* TRK0 */ 848 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error 849 /* Abort & !ICRC */ 850 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command 851 /* Media change request */ 852 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline 853 /* SRV */ 854 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found 855 /* Media change */ 856 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline 857 /* ECC */ 858 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error 859 /* BBD - block marked bad */ 860 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error 861 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 862 }; 863 static const unsigned char stat_table[][4] = { 864 /* Must be first because BUSY means no other bits valid */ 865 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now 866 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault 867 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now 868 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered 869 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 870 }; 871 872 /* 873 * Is this an error we can process/parse 874 */ 875 if (drv_stat & ATA_BUSY) { 876 drv_err = 0; /* Ignore the err bits, they're invalid */ 877 } 878 879 if (drv_err) { 880 /* Look for drv_err */ 881 for (i = 0; sense_table[i][0] != 0xFF; i++) { 882 /* Look for best matches first */ 883 if ((sense_table[i][0] & drv_err) == 884 sense_table[i][0]) { 885 *sk = sense_table[i][1]; 886 *asc = sense_table[i][2]; 887 *ascq = sense_table[i][3]; 888 goto translate_done; 889 } 890 } 891 /* No immediate match */ 892 if (verbose) 893 printk(KERN_WARNING "ata%u: no sense translation for " 894 "error 0x%02x\n", id, drv_err); 895 } 896 897 /* Fall back to interpreting status bits */ 898 for (i = 0; stat_table[i][0] != 0xFF; i++) { 899 if (stat_table[i][0] & drv_stat) { 900 *sk = stat_table[i][1]; 901 *asc = stat_table[i][2]; 902 *ascq = stat_table[i][3]; 903 goto translate_done; 904 } 905 } 906 /* No error? Undecoded? */ 907 if (verbose) 908 printk(KERN_WARNING "ata%u: no sense translation for " 909 "status: 0x%02x\n", id, drv_stat); 910 911 /* We need a sensible error return here, which is tricky, and one 912 that won't cause people to do things like return a disk wrongly */ 913 *sk = ABORTED_COMMAND; 914 *asc = 0x00; 915 *ascq = 0x00; 916 917 translate_done: 918 if (verbose) 919 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " 920 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 921 id, drv_stat, drv_err, *sk, *asc, *ascq); 922 return; 923 } 924 925 /* 926 * ata_gen_passthru_sense - Generate check condition sense block. 927 * @qc: Command that completed. 928 * 929 * This function is specific to the ATA descriptor format sense 930 * block specified for the ATA pass through commands. Regardless 931 * of whether the command errored or not, return a sense 932 * block. Copy all controller registers into the sense 933 * block. Clear sense key, ASC & ASCQ if there is no error. 934 * 935 * LOCKING: 936 * None. 937 */ 938 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 939 { 940 struct scsi_cmnd *cmd = qc->scsicmd; 941 struct ata_taskfile *tf = &qc->result_tf; 942 unsigned char *sb = cmd->sense_buffer; 943 unsigned char *desc = sb + 8; 944 int verbose = qc->ap->ops->error_handler == NULL; 945 946 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 947 948 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 949 950 /* 951 * Use ata_to_sense_error() to map status register bits 952 * onto sense key, asc & ascq. 953 */ 954 if (qc->err_mask || 955 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 956 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 957 &sb[1], &sb[2], &sb[3], verbose); 958 sb[1] &= 0x0f; 959 } 960 961 /* 962 * Sense data is current and format is descriptor. 963 */ 964 sb[0] = 0x72; 965 966 desc[0] = 0x09; 967 968 /* set length of additional sense data */ 969 sb[7] = 14; 970 desc[1] = 12; 971 972 /* 973 * Copy registers into sense buffer. 974 */ 975 desc[2] = 0x00; 976 desc[3] = tf->feature; /* == error reg */ 977 desc[5] = tf->nsect; 978 desc[7] = tf->lbal; 979 desc[9] = tf->lbam; 980 desc[11] = tf->lbah; 981 desc[12] = tf->device; 982 desc[13] = tf->command; /* == status reg */ 983 984 /* 985 * Fill in Extend bit, and the high order bytes 986 * if applicable. 987 */ 988 if (tf->flags & ATA_TFLAG_LBA48) { 989 desc[2] |= 0x01; 990 desc[4] = tf->hob_nsect; 991 desc[6] = tf->hob_lbal; 992 desc[8] = tf->hob_lbam; 993 desc[10] = tf->hob_lbah; 994 } 995 } 996 997 /** 998 * ata_gen_ata_sense - generate a SCSI fixed sense block 999 * @qc: Command that we are erroring out 1000 * 1001 * Generate sense block for a failed ATA command @qc. Descriptor 1002 * format is used to accomodate LBA48 block address. 1003 * 1004 * LOCKING: 1005 * None. 1006 */ 1007 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 1008 { 1009 struct ata_device *dev = qc->dev; 1010 struct scsi_cmnd *cmd = qc->scsicmd; 1011 struct ata_taskfile *tf = &qc->result_tf; 1012 unsigned char *sb = cmd->sense_buffer; 1013 unsigned char *desc = sb + 8; 1014 int verbose = qc->ap->ops->error_handler == NULL; 1015 u64 block; 1016 1017 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1018 1019 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1020 1021 /* sense data is current and format is descriptor */ 1022 sb[0] = 0x72; 1023 1024 /* Use ata_to_sense_error() to map status register bits 1025 * onto sense key, asc & ascq. 1026 */ 1027 if (qc->err_mask || 1028 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1029 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1030 &sb[1], &sb[2], &sb[3], verbose); 1031 sb[1] &= 0x0f; 1032 } 1033 1034 block = ata_tf_read_block(&qc->result_tf, dev); 1035 1036 /* information sense data descriptor */ 1037 sb[7] = 12; 1038 desc[0] = 0x00; 1039 desc[1] = 10; 1040 1041 desc[2] |= 0x80; /* valid */ 1042 desc[6] = block >> 40; 1043 desc[7] = block >> 32; 1044 desc[8] = block >> 24; 1045 desc[9] = block >> 16; 1046 desc[10] = block >> 8; 1047 desc[11] = block; 1048 } 1049 1050 static void ata_scsi_sdev_config(struct scsi_device *sdev) 1051 { 1052 sdev->use_10_for_rw = 1; 1053 sdev->use_10_for_ms = 1; 1054 1055 /* Schedule policy is determined by ->qc_defer() callback and 1056 * it needs to see every deferred qc. Set dev_blocked to 1 to 1057 * prevent SCSI midlayer from automatically deferring 1058 * requests. 1059 */ 1060 sdev->max_device_blocked = 1; 1061 } 1062 1063 /** 1064 * atapi_drain_needed - Check whether data transfer may overflow 1065 * @rq: request to be checked 1066 * 1067 * ATAPI commands which transfer variable length data to host 1068 * might overflow due to application error or hardare bug. This 1069 * function checks whether overflow should be drained and ignored 1070 * for @request. 1071 * 1072 * LOCKING: 1073 * None. 1074 * 1075 * RETURNS: 1076 * 1 if ; otherwise, 0. 1077 */ 1078 static int atapi_drain_needed(struct request *rq) 1079 { 1080 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC)) 1081 return 0; 1082 1083 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE)) 1084 return 0; 1085 1086 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; 1087 } 1088 1089 static int ata_scsi_dev_config(struct scsi_device *sdev, 1090 struct ata_device *dev) 1091 { 1092 if (!ata_id_has_unload(dev->id)) 1093 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1094 1095 /* configure max sectors */ 1096 blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors); 1097 1098 if (dev->class == ATA_DEV_ATAPI) { 1099 struct request_queue *q = sdev->request_queue; 1100 void *buf; 1101 1102 /* set the min alignment and padding */ 1103 blk_queue_update_dma_alignment(sdev->request_queue, 1104 ATA_DMA_PAD_SZ - 1); 1105 blk_queue_update_dma_pad(sdev->request_queue, 1106 ATA_DMA_PAD_SZ - 1); 1107 1108 /* configure draining */ 1109 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1110 if (!buf) { 1111 ata_dev_printk(dev, KERN_ERR, 1112 "drain buffer allocation failed\n"); 1113 return -ENOMEM; 1114 } 1115 1116 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1117 } else { 1118 /* ATA devices must be sector aligned */ 1119 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1120 blk_queue_update_dma_alignment(sdev->request_queue, 1121 sdev->sector_size - 1); 1122 sdev->manage_start_stop = 1; 1123 } 1124 1125 if (dev->flags & ATA_DFLAG_AN) 1126 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1127 1128 if (dev->flags & ATA_DFLAG_NCQ) { 1129 int depth; 1130 1131 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1132 depth = min(ATA_MAX_QUEUE - 1, depth); 1133 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); 1134 } 1135 1136 dev->sdev = sdev; 1137 return 0; 1138 } 1139 1140 /** 1141 * ata_scsi_slave_config - Set SCSI device attributes 1142 * @sdev: SCSI device to examine 1143 * 1144 * This is called before we actually start reading 1145 * and writing to the device, to configure certain 1146 * SCSI mid-layer behaviors. 1147 * 1148 * LOCKING: 1149 * Defined by SCSI layer. We don't really care. 1150 */ 1151 1152 int ata_scsi_slave_config(struct scsi_device *sdev) 1153 { 1154 struct ata_port *ap = ata_shost_to_port(sdev->host); 1155 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1156 int rc = 0; 1157 1158 ata_scsi_sdev_config(sdev); 1159 1160 if (dev) 1161 rc = ata_scsi_dev_config(sdev, dev); 1162 1163 return rc; 1164 } 1165 1166 /** 1167 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1168 * @sdev: SCSI device to be destroyed 1169 * 1170 * @sdev is about to be destroyed for hot/warm unplugging. If 1171 * this unplugging was initiated by libata as indicated by NULL 1172 * dev->sdev, this function doesn't have to do anything. 1173 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1174 * Clear dev->sdev, schedule the device for ATA detach and invoke 1175 * EH. 1176 * 1177 * LOCKING: 1178 * Defined by SCSI layer. We don't really care. 1179 */ 1180 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1181 { 1182 struct ata_port *ap = ata_shost_to_port(sdev->host); 1183 struct request_queue *q = sdev->request_queue; 1184 unsigned long flags; 1185 struct ata_device *dev; 1186 1187 if (!ap->ops->error_handler) 1188 return; 1189 1190 spin_lock_irqsave(ap->lock, flags); 1191 dev = __ata_scsi_find_dev(ap, sdev); 1192 if (dev && dev->sdev) { 1193 /* SCSI device already in CANCEL state, no need to offline it */ 1194 dev->sdev = NULL; 1195 dev->flags |= ATA_DFLAG_DETACH; 1196 ata_port_schedule_eh(ap); 1197 } 1198 spin_unlock_irqrestore(ap->lock, flags); 1199 1200 kfree(q->dma_drain_buffer); 1201 q->dma_drain_buffer = NULL; 1202 q->dma_drain_size = 0; 1203 } 1204 1205 /** 1206 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1207 * @sdev: SCSI device to configure queue depth for 1208 * @queue_depth: new queue depth 1209 * @reason: calling context 1210 * 1211 * This is libata standard hostt->change_queue_depth callback. 1212 * SCSI will call into this callback when user tries to set queue 1213 * depth via sysfs. 1214 * 1215 * LOCKING: 1216 * SCSI layer (we don't care) 1217 * 1218 * RETURNS: 1219 * Newly configured queue depth. 1220 */ 1221 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth, 1222 int reason) 1223 { 1224 struct ata_port *ap = ata_shost_to_port(sdev->host); 1225 struct ata_device *dev; 1226 unsigned long flags; 1227 1228 if (reason != SCSI_QDEPTH_DEFAULT) 1229 return -EOPNOTSUPP; 1230 1231 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1232 return sdev->queue_depth; 1233 1234 dev = ata_scsi_find_dev(ap, sdev); 1235 if (!dev || !ata_dev_enabled(dev)) 1236 return sdev->queue_depth; 1237 1238 /* NCQ enabled? */ 1239 spin_lock_irqsave(ap->lock, flags); 1240 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1241 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1242 dev->flags |= ATA_DFLAG_NCQ_OFF; 1243 queue_depth = 1; 1244 } 1245 spin_unlock_irqrestore(ap->lock, flags); 1246 1247 /* limit and apply queue depth */ 1248 queue_depth = min(queue_depth, sdev->host->can_queue); 1249 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1250 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); 1251 1252 if (sdev->queue_depth == queue_depth) 1253 return -EINVAL; 1254 1255 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); 1256 return queue_depth; 1257 } 1258 1259 /** 1260 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1261 * @qc: Storage for translated ATA taskfile 1262 * 1263 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1264 * (to start). Perhaps these commands should be preceded by 1265 * CHECK POWER MODE to see what power mode the device is already in. 1266 * [See SAT revision 5 at www.t10.org] 1267 * 1268 * LOCKING: 1269 * spin_lock_irqsave(host lock) 1270 * 1271 * RETURNS: 1272 * Zero on success, non-zero on error. 1273 */ 1274 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1275 { 1276 struct scsi_cmnd *scmd = qc->scsicmd; 1277 struct ata_taskfile *tf = &qc->tf; 1278 const u8 *cdb = scmd->cmnd; 1279 1280 if (scmd->cmd_len < 5) 1281 goto invalid_fld; 1282 1283 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1284 tf->protocol = ATA_PROT_NODATA; 1285 if (cdb[1] & 0x1) { 1286 ; /* ignore IMMED bit, violates sat-r05 */ 1287 } 1288 if (cdb[4] & 0x2) 1289 goto invalid_fld; /* LOEJ bit set not supported */ 1290 if (((cdb[4] >> 4) & 0xf) != 0) 1291 goto invalid_fld; /* power conditions not supported */ 1292 1293 if (cdb[4] & 0x1) { 1294 tf->nsect = 1; /* 1 sector, lba=0 */ 1295 1296 if (qc->dev->flags & ATA_DFLAG_LBA) { 1297 tf->flags |= ATA_TFLAG_LBA; 1298 1299 tf->lbah = 0x0; 1300 tf->lbam = 0x0; 1301 tf->lbal = 0x0; 1302 tf->device |= ATA_LBA; 1303 } else { 1304 /* CHS */ 1305 tf->lbal = 0x1; /* sect */ 1306 tf->lbam = 0x0; /* cyl low */ 1307 tf->lbah = 0x0; /* cyl high */ 1308 } 1309 1310 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1311 } else { 1312 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1313 * or S5) causing some drives to spin up and down again. 1314 */ 1315 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1316 system_state == SYSTEM_POWER_OFF) 1317 goto skip; 1318 1319 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1320 system_entering_hibernation()) 1321 goto skip; 1322 1323 /* Issue ATA STANDBY IMMEDIATE command */ 1324 tf->command = ATA_CMD_STANDBYNOW1; 1325 } 1326 1327 /* 1328 * Standby and Idle condition timers could be implemented but that 1329 * would require libata to implement the Power condition mode page 1330 * and allow the user to change it. Changing mode pages requires 1331 * MODE SELECT to be implemented. 1332 */ 1333 1334 return 0; 1335 1336 invalid_fld: 1337 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1338 /* "Invalid field in cbd" */ 1339 return 1; 1340 skip: 1341 scmd->result = SAM_STAT_GOOD; 1342 return 1; 1343 } 1344 1345 1346 /** 1347 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1348 * @qc: Storage for translated ATA taskfile 1349 * 1350 * Sets up an ATA taskfile to issue FLUSH CACHE or 1351 * FLUSH CACHE EXT. 1352 * 1353 * LOCKING: 1354 * spin_lock_irqsave(host lock) 1355 * 1356 * RETURNS: 1357 * Zero on success, non-zero on error. 1358 */ 1359 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1360 { 1361 struct ata_taskfile *tf = &qc->tf; 1362 1363 tf->flags |= ATA_TFLAG_DEVICE; 1364 tf->protocol = ATA_PROT_NODATA; 1365 1366 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1367 tf->command = ATA_CMD_FLUSH_EXT; 1368 else 1369 tf->command = ATA_CMD_FLUSH; 1370 1371 /* flush is critical for IO integrity, consider it an IO command */ 1372 qc->flags |= ATA_QCFLAG_IO; 1373 1374 return 0; 1375 } 1376 1377 /** 1378 * scsi_6_lba_len - Get LBA and transfer length 1379 * @cdb: SCSI command to translate 1380 * 1381 * Calculate LBA and transfer length for 6-byte commands. 1382 * 1383 * RETURNS: 1384 * @plba: the LBA 1385 * @plen: the transfer length 1386 */ 1387 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1388 { 1389 u64 lba = 0; 1390 u32 len; 1391 1392 VPRINTK("six-byte command\n"); 1393 1394 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1395 lba |= ((u64)cdb[2]) << 8; 1396 lba |= ((u64)cdb[3]); 1397 1398 len = cdb[4]; 1399 1400 *plba = lba; 1401 *plen = len; 1402 } 1403 1404 /** 1405 * scsi_10_lba_len - Get LBA and transfer length 1406 * @cdb: SCSI command to translate 1407 * 1408 * Calculate LBA and transfer length for 10-byte commands. 1409 * 1410 * RETURNS: 1411 * @plba: the LBA 1412 * @plen: the transfer length 1413 */ 1414 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1415 { 1416 u64 lba = 0; 1417 u32 len = 0; 1418 1419 VPRINTK("ten-byte command\n"); 1420 1421 lba |= ((u64)cdb[2]) << 24; 1422 lba |= ((u64)cdb[3]) << 16; 1423 lba |= ((u64)cdb[4]) << 8; 1424 lba |= ((u64)cdb[5]); 1425 1426 len |= ((u32)cdb[7]) << 8; 1427 len |= ((u32)cdb[8]); 1428 1429 *plba = lba; 1430 *plen = len; 1431 } 1432 1433 /** 1434 * scsi_16_lba_len - Get LBA and transfer length 1435 * @cdb: SCSI command to translate 1436 * 1437 * Calculate LBA and transfer length for 16-byte commands. 1438 * 1439 * RETURNS: 1440 * @plba: the LBA 1441 * @plen: the transfer length 1442 */ 1443 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1444 { 1445 u64 lba = 0; 1446 u32 len = 0; 1447 1448 VPRINTK("sixteen-byte command\n"); 1449 1450 lba |= ((u64)cdb[2]) << 56; 1451 lba |= ((u64)cdb[3]) << 48; 1452 lba |= ((u64)cdb[4]) << 40; 1453 lba |= ((u64)cdb[5]) << 32; 1454 lba |= ((u64)cdb[6]) << 24; 1455 lba |= ((u64)cdb[7]) << 16; 1456 lba |= ((u64)cdb[8]) << 8; 1457 lba |= ((u64)cdb[9]); 1458 1459 len |= ((u32)cdb[10]) << 24; 1460 len |= ((u32)cdb[11]) << 16; 1461 len |= ((u32)cdb[12]) << 8; 1462 len |= ((u32)cdb[13]); 1463 1464 *plba = lba; 1465 *plen = len; 1466 } 1467 1468 /** 1469 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1470 * @qc: Storage for translated ATA taskfile 1471 * 1472 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1473 * 1474 * LOCKING: 1475 * spin_lock_irqsave(host lock) 1476 * 1477 * RETURNS: 1478 * Zero on success, non-zero on error. 1479 */ 1480 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1481 { 1482 struct scsi_cmnd *scmd = qc->scsicmd; 1483 struct ata_taskfile *tf = &qc->tf; 1484 struct ata_device *dev = qc->dev; 1485 u64 dev_sectors = qc->dev->n_sectors; 1486 const u8 *cdb = scmd->cmnd; 1487 u64 block; 1488 u32 n_block; 1489 1490 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1491 tf->protocol = ATA_PROT_NODATA; 1492 1493 if (cdb[0] == VERIFY) { 1494 if (scmd->cmd_len < 10) 1495 goto invalid_fld; 1496 scsi_10_lba_len(cdb, &block, &n_block); 1497 } else if (cdb[0] == VERIFY_16) { 1498 if (scmd->cmd_len < 16) 1499 goto invalid_fld; 1500 scsi_16_lba_len(cdb, &block, &n_block); 1501 } else 1502 goto invalid_fld; 1503 1504 if (!n_block) 1505 goto nothing_to_do; 1506 if (block >= dev_sectors) 1507 goto out_of_range; 1508 if ((block + n_block) > dev_sectors) 1509 goto out_of_range; 1510 1511 if (dev->flags & ATA_DFLAG_LBA) { 1512 tf->flags |= ATA_TFLAG_LBA; 1513 1514 if (lba_28_ok(block, n_block)) { 1515 /* use LBA28 */ 1516 tf->command = ATA_CMD_VERIFY; 1517 tf->device |= (block >> 24) & 0xf; 1518 } else if (lba_48_ok(block, n_block)) { 1519 if (!(dev->flags & ATA_DFLAG_LBA48)) 1520 goto out_of_range; 1521 1522 /* use LBA48 */ 1523 tf->flags |= ATA_TFLAG_LBA48; 1524 tf->command = ATA_CMD_VERIFY_EXT; 1525 1526 tf->hob_nsect = (n_block >> 8) & 0xff; 1527 1528 tf->hob_lbah = (block >> 40) & 0xff; 1529 tf->hob_lbam = (block >> 32) & 0xff; 1530 tf->hob_lbal = (block >> 24) & 0xff; 1531 } else 1532 /* request too large even for LBA48 */ 1533 goto out_of_range; 1534 1535 tf->nsect = n_block & 0xff; 1536 1537 tf->lbah = (block >> 16) & 0xff; 1538 tf->lbam = (block >> 8) & 0xff; 1539 tf->lbal = block & 0xff; 1540 1541 tf->device |= ATA_LBA; 1542 } else { 1543 /* CHS */ 1544 u32 sect, head, cyl, track; 1545 1546 if (!lba_28_ok(block, n_block)) 1547 goto out_of_range; 1548 1549 /* Convert LBA to CHS */ 1550 track = (u32)block / dev->sectors; 1551 cyl = track / dev->heads; 1552 head = track % dev->heads; 1553 sect = (u32)block % dev->sectors + 1; 1554 1555 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1556 (u32)block, track, cyl, head, sect); 1557 1558 /* Check whether the converted CHS can fit. 1559 Cylinder: 0-65535 1560 Head: 0-15 1561 Sector: 1-255*/ 1562 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1563 goto out_of_range; 1564 1565 tf->command = ATA_CMD_VERIFY; 1566 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1567 tf->lbal = sect; 1568 tf->lbam = cyl; 1569 tf->lbah = cyl >> 8; 1570 tf->device |= head; 1571 } 1572 1573 return 0; 1574 1575 invalid_fld: 1576 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1577 /* "Invalid field in cbd" */ 1578 return 1; 1579 1580 out_of_range: 1581 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1582 /* "Logical Block Address out of range" */ 1583 return 1; 1584 1585 nothing_to_do: 1586 scmd->result = SAM_STAT_GOOD; 1587 return 1; 1588 } 1589 1590 /** 1591 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1592 * @qc: Storage for translated ATA taskfile 1593 * 1594 * Converts any of six SCSI read/write commands into the 1595 * ATA counterpart, including starting sector (LBA), 1596 * sector count, and taking into account the device's LBA48 1597 * support. 1598 * 1599 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1600 * %WRITE_16 are currently supported. 1601 * 1602 * LOCKING: 1603 * spin_lock_irqsave(host lock) 1604 * 1605 * RETURNS: 1606 * Zero on success, non-zero on error. 1607 */ 1608 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1609 { 1610 struct scsi_cmnd *scmd = qc->scsicmd; 1611 const u8 *cdb = scmd->cmnd; 1612 unsigned int tf_flags = 0; 1613 u64 block; 1614 u32 n_block; 1615 int rc; 1616 1617 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1618 tf_flags |= ATA_TFLAG_WRITE; 1619 1620 /* Calculate the SCSI LBA, transfer length and FUA. */ 1621 switch (cdb[0]) { 1622 case READ_10: 1623 case WRITE_10: 1624 if (unlikely(scmd->cmd_len < 10)) 1625 goto invalid_fld; 1626 scsi_10_lba_len(cdb, &block, &n_block); 1627 if (unlikely(cdb[1] & (1 << 3))) 1628 tf_flags |= ATA_TFLAG_FUA; 1629 break; 1630 case READ_6: 1631 case WRITE_6: 1632 if (unlikely(scmd->cmd_len < 6)) 1633 goto invalid_fld; 1634 scsi_6_lba_len(cdb, &block, &n_block); 1635 1636 /* for 6-byte r/w commands, transfer length 0 1637 * means 256 blocks of data, not 0 block. 1638 */ 1639 if (!n_block) 1640 n_block = 256; 1641 break; 1642 case READ_16: 1643 case WRITE_16: 1644 if (unlikely(scmd->cmd_len < 16)) 1645 goto invalid_fld; 1646 scsi_16_lba_len(cdb, &block, &n_block); 1647 if (unlikely(cdb[1] & (1 << 3))) 1648 tf_flags |= ATA_TFLAG_FUA; 1649 break; 1650 default: 1651 DPRINTK("no-byte command\n"); 1652 goto invalid_fld; 1653 } 1654 1655 /* Check and compose ATA command */ 1656 if (!n_block) 1657 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1658 * length 0 means transfer 0 block of data. 1659 * However, for ATA R/W commands, sector count 0 means 1660 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1661 * 1662 * WARNING: one or two older ATA drives treat 0 as 0... 1663 */ 1664 goto nothing_to_do; 1665 1666 qc->flags |= ATA_QCFLAG_IO; 1667 qc->nbytes = n_block * scmd->device->sector_size; 1668 1669 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1670 qc->tag); 1671 if (likely(rc == 0)) 1672 return 0; 1673 1674 if (rc == -ERANGE) 1675 goto out_of_range; 1676 /* treat all other errors as -EINVAL, fall through */ 1677 invalid_fld: 1678 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1679 /* "Invalid field in cbd" */ 1680 return 1; 1681 1682 out_of_range: 1683 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1684 /* "Logical Block Address out of range" */ 1685 return 1; 1686 1687 nothing_to_do: 1688 scmd->result = SAM_STAT_GOOD; 1689 return 1; 1690 } 1691 1692 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1693 { 1694 struct ata_port *ap = qc->ap; 1695 struct scsi_cmnd *cmd = qc->scsicmd; 1696 u8 *cdb = cmd->cmnd; 1697 int need_sense = (qc->err_mask != 0); 1698 1699 /* For ATA pass thru (SAT) commands, generate a sense block if 1700 * user mandated it or if there's an error. Note that if we 1701 * generate because the user forced us to, a check condition 1702 * is generated and the ATA register values are returned 1703 * whether the command completed successfully or not. If there 1704 * was no error, SK, ASC and ASCQ will all be zero. 1705 */ 1706 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1707 ((cdb[2] & 0x20) || need_sense)) { 1708 ata_gen_passthru_sense(qc); 1709 } else { 1710 if (!need_sense) { 1711 cmd->result = SAM_STAT_GOOD; 1712 } else { 1713 /* TODO: decide which descriptor format to use 1714 * for 48b LBA devices and call that here 1715 * instead of the fixed desc, which is only 1716 * good for smaller LBA (and maybe CHS?) 1717 * devices. 1718 */ 1719 ata_gen_ata_sense(qc); 1720 } 1721 } 1722 1723 if (need_sense && !ap->ops->error_handler) 1724 ata_dump_status(ap->print_id, &qc->result_tf); 1725 1726 qc->scsidone(cmd); 1727 1728 ata_qc_free(qc); 1729 } 1730 1731 /** 1732 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1733 * @dev: ATA device to which the command is addressed 1734 * @cmd: SCSI command to execute 1735 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1736 * 1737 * Our ->queuecommand() function has decided that the SCSI 1738 * command issued can be directly translated into an ATA 1739 * command, rather than handled internally. 1740 * 1741 * This function sets up an ata_queued_cmd structure for the 1742 * SCSI command, and sends that ata_queued_cmd to the hardware. 1743 * 1744 * The xlat_func argument (actor) returns 0 if ready to execute 1745 * ATA command, else 1 to finish translation. If 1 is returned 1746 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1747 * to be set reflecting an error condition or clean (early) 1748 * termination. 1749 * 1750 * LOCKING: 1751 * spin_lock_irqsave(host lock) 1752 * 1753 * RETURNS: 1754 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1755 * needs to be deferred. 1756 */ 1757 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1758 ata_xlat_func_t xlat_func) 1759 { 1760 struct ata_port *ap = dev->link->ap; 1761 struct ata_queued_cmd *qc; 1762 int rc; 1763 1764 VPRINTK("ENTER\n"); 1765 1766 qc = ata_scsi_qc_new(dev, cmd); 1767 if (!qc) 1768 goto err_mem; 1769 1770 /* data is present; dma-map it */ 1771 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1772 cmd->sc_data_direction == DMA_TO_DEVICE) { 1773 if (unlikely(scsi_bufflen(cmd) < 1)) { 1774 ata_dev_printk(dev, KERN_WARNING, 1775 "WARNING: zero len r/w req\n"); 1776 goto err_did; 1777 } 1778 1779 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1780 1781 qc->dma_dir = cmd->sc_data_direction; 1782 } 1783 1784 qc->complete_fn = ata_scsi_qc_complete; 1785 1786 if (xlat_func(qc)) 1787 goto early_finish; 1788 1789 if (ap->ops->qc_defer) { 1790 if ((rc = ap->ops->qc_defer(qc))) 1791 goto defer; 1792 } 1793 1794 /* select device, send command to hardware */ 1795 ata_qc_issue(qc); 1796 1797 VPRINTK("EXIT\n"); 1798 return 0; 1799 1800 early_finish: 1801 ata_qc_free(qc); 1802 cmd->scsi_done(cmd); 1803 DPRINTK("EXIT - early finish (good or error)\n"); 1804 return 0; 1805 1806 err_did: 1807 ata_qc_free(qc); 1808 cmd->result = (DID_ERROR << 16); 1809 cmd->scsi_done(cmd); 1810 err_mem: 1811 DPRINTK("EXIT - internal\n"); 1812 return 0; 1813 1814 defer: 1815 ata_qc_free(qc); 1816 DPRINTK("EXIT - defer\n"); 1817 if (rc == ATA_DEFER_LINK) 1818 return SCSI_MLQUEUE_DEVICE_BUSY; 1819 else 1820 return SCSI_MLQUEUE_HOST_BUSY; 1821 } 1822 1823 /** 1824 * ata_scsi_rbuf_get - Map response buffer. 1825 * @cmd: SCSI command containing buffer to be mapped. 1826 * @flags: unsigned long variable to store irq enable status 1827 * @copy_in: copy in from user buffer 1828 * 1829 * Prepare buffer for simulated SCSI commands. 1830 * 1831 * LOCKING: 1832 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 1833 * 1834 * RETURNS: 1835 * Pointer to response buffer. 1836 */ 1837 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 1838 unsigned long *flags) 1839 { 1840 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 1841 1842 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1843 if (copy_in) 1844 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1845 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1846 return ata_scsi_rbuf; 1847 } 1848 1849 /** 1850 * ata_scsi_rbuf_put - Unmap response buffer. 1851 * @cmd: SCSI command containing buffer to be unmapped. 1852 * @copy_out: copy out result 1853 * @flags: @flags passed to ata_scsi_rbuf_get() 1854 * 1855 * Returns rbuf buffer. The result is copied to @cmd's buffer if 1856 * @copy_back is true. 1857 * 1858 * LOCKING: 1859 * Unlocks ata_scsi_rbuf_lock. 1860 */ 1861 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 1862 unsigned long *flags) 1863 { 1864 if (copy_out) 1865 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1866 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1867 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 1868 } 1869 1870 /** 1871 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1872 * @args: device IDENTIFY data / SCSI command of interest. 1873 * @actor: Callback hook for desired SCSI command simulator 1874 * 1875 * Takes care of the hard work of simulating a SCSI command... 1876 * Mapping the response buffer, calling the command's handler, 1877 * and handling the handler's return value. This return value 1878 * indicates whether the handler wishes the SCSI command to be 1879 * completed successfully (0), or not (in which case cmd->result 1880 * and sense buffer are assumed to be set). 1881 * 1882 * LOCKING: 1883 * spin_lock_irqsave(host lock) 1884 */ 1885 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1886 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1887 { 1888 u8 *rbuf; 1889 unsigned int rc; 1890 struct scsi_cmnd *cmd = args->cmd; 1891 unsigned long flags; 1892 1893 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 1894 rc = actor(args, rbuf); 1895 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 1896 1897 if (rc == 0) 1898 cmd->result = SAM_STAT_GOOD; 1899 args->done(cmd); 1900 } 1901 1902 /** 1903 * ata_scsiop_inq_std - Simulate INQUIRY command 1904 * @args: device IDENTIFY data / SCSI command of interest. 1905 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1906 * 1907 * Returns standard device identification data associated 1908 * with non-VPD INQUIRY command output. 1909 * 1910 * LOCKING: 1911 * spin_lock_irqsave(host lock) 1912 */ 1913 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1914 { 1915 const u8 versions[] = { 1916 0x60, /* SAM-3 (no version claimed) */ 1917 1918 0x03, 1919 0x20, /* SBC-2 (no version claimed) */ 1920 1921 0x02, 1922 0x60 /* SPC-3 (no version claimed) */ 1923 }; 1924 u8 hdr[] = { 1925 TYPE_DISK, 1926 0, 1927 0x5, /* claim SPC-3 version compatibility */ 1928 2, 1929 95 - 4 1930 }; 1931 1932 VPRINTK("ENTER\n"); 1933 1934 /* set scsi removeable (RMB) bit per ata bit */ 1935 if (ata_id_removeable(args->id)) 1936 hdr[1] |= (1 << 7); 1937 1938 memcpy(rbuf, hdr, sizeof(hdr)); 1939 memcpy(&rbuf[8], "ATA ", 8); 1940 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1941 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1942 1943 if (rbuf[32] == 0 || rbuf[32] == ' ') 1944 memcpy(&rbuf[32], "n/a ", 4); 1945 1946 memcpy(rbuf + 59, versions, sizeof(versions)); 1947 1948 return 0; 1949 } 1950 1951 /** 1952 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1953 * @args: device IDENTIFY data / SCSI command of interest. 1954 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1955 * 1956 * Returns list of inquiry VPD pages available. 1957 * 1958 * LOCKING: 1959 * spin_lock_irqsave(host lock) 1960 */ 1961 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1962 { 1963 const u8 pages[] = { 1964 0x00, /* page 0x00, this page */ 1965 0x80, /* page 0x80, unit serial no page */ 1966 0x83, /* page 0x83, device ident page */ 1967 0x89, /* page 0x89, ata info page */ 1968 0xb0, /* page 0xb0, block limits page */ 1969 0xb1, /* page 0xb1, block device characteristics page */ 1970 0xb2, /* page 0xb2, thin provisioning page */ 1971 }; 1972 1973 rbuf[3] = sizeof(pages); /* number of supported VPD pages */ 1974 memcpy(rbuf + 4, pages, sizeof(pages)); 1975 return 0; 1976 } 1977 1978 /** 1979 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1980 * @args: device IDENTIFY data / SCSI command of interest. 1981 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1982 * 1983 * Returns ATA device serial number. 1984 * 1985 * LOCKING: 1986 * spin_lock_irqsave(host lock) 1987 */ 1988 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1989 { 1990 const u8 hdr[] = { 1991 0, 1992 0x80, /* this page code */ 1993 0, 1994 ATA_ID_SERNO_LEN, /* page len */ 1995 }; 1996 1997 memcpy(rbuf, hdr, sizeof(hdr)); 1998 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1999 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2000 return 0; 2001 } 2002 2003 /** 2004 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2005 * @args: device IDENTIFY data / SCSI command of interest. 2006 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2007 * 2008 * Yields two logical unit device identification designators: 2009 * - vendor specific ASCII containing the ATA serial number 2010 * - SAT defined "t10 vendor id based" containing ASCII vendor 2011 * name ("ATA "), model and serial numbers. 2012 * 2013 * LOCKING: 2014 * spin_lock_irqsave(host lock) 2015 */ 2016 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2017 { 2018 const int sat_model_serial_desc_len = 68; 2019 int num; 2020 2021 rbuf[1] = 0x83; /* this page code */ 2022 num = 4; 2023 2024 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2025 rbuf[num + 0] = 2; 2026 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2027 num += 4; 2028 ata_id_string(args->id, (unsigned char *) rbuf + num, 2029 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2030 num += ATA_ID_SERNO_LEN; 2031 2032 /* SAT defined lu model and serial numbers descriptor */ 2033 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2034 rbuf[num + 0] = 2; 2035 rbuf[num + 1] = 1; 2036 rbuf[num + 3] = sat_model_serial_desc_len; 2037 num += 4; 2038 memcpy(rbuf + num, "ATA ", 8); 2039 num += 8; 2040 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2041 ATA_ID_PROD_LEN); 2042 num += ATA_ID_PROD_LEN; 2043 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2044 ATA_ID_SERNO_LEN); 2045 num += ATA_ID_SERNO_LEN; 2046 2047 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2048 return 0; 2049 } 2050 2051 /** 2052 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2053 * @args: device IDENTIFY data / SCSI command of interest. 2054 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2055 * 2056 * Yields SAT-specified ATA VPD page. 2057 * 2058 * LOCKING: 2059 * spin_lock_irqsave(host lock) 2060 */ 2061 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2062 { 2063 struct ata_taskfile tf; 2064 2065 memset(&tf, 0, sizeof(tf)); 2066 2067 rbuf[1] = 0x89; /* our page code */ 2068 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2069 rbuf[3] = (0x238 & 0xff); 2070 2071 memcpy(&rbuf[8], "linux ", 8); 2072 memcpy(&rbuf[16], "libata ", 16); 2073 memcpy(&rbuf[32], DRV_VERSION, 4); 2074 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2075 2076 /* we don't store the ATA device signature, so we fake it */ 2077 2078 tf.command = ATA_DRDY; /* really, this is Status reg */ 2079 tf.lbal = 0x1; 2080 tf.nsect = 0x1; 2081 2082 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2083 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2084 2085 rbuf[56] = ATA_CMD_ID_ATA; 2086 2087 memcpy(&rbuf[60], &args->id[0], 512); 2088 return 0; 2089 } 2090 2091 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2092 { 2093 u16 min_io_sectors; 2094 2095 rbuf[1] = 0xb0; 2096 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2097 2098 /* 2099 * Optimal transfer length granularity. 2100 * 2101 * This is always one physical block, but for disks with a smaller 2102 * logical than physical sector size we need to figure out what the 2103 * latter is. 2104 */ 2105 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2106 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2107 2108 /* 2109 * Optimal unmap granularity. 2110 * 2111 * The ATA spec doesn't even know about a granularity or alignment 2112 * for the TRIM command. We can leave away most of the unmap related 2113 * VPD page entries, but we have specifify a granularity to signal 2114 * that we support some form of unmap - in thise case via WRITE SAME 2115 * with the unmap bit set. 2116 */ 2117 if (ata_id_has_trim(args->id)) { 2118 put_unaligned_be32(65535 * 512 / 8, &rbuf[20]); 2119 put_unaligned_be32(1, &rbuf[28]); 2120 } 2121 2122 return 0; 2123 } 2124 2125 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2126 { 2127 int form_factor = ata_id_form_factor(args->id); 2128 int media_rotation_rate = ata_id_rotation_rate(args->id); 2129 2130 rbuf[1] = 0xb1; 2131 rbuf[3] = 0x3c; 2132 rbuf[4] = media_rotation_rate >> 8; 2133 rbuf[5] = media_rotation_rate; 2134 rbuf[7] = form_factor; 2135 2136 return 0; 2137 } 2138 2139 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2140 { 2141 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2142 rbuf[1] = 0xb2; 2143 rbuf[3] = 0x4; 2144 rbuf[5] = 1 << 6; /* TPWS */ 2145 2146 return 0; 2147 } 2148 2149 /** 2150 * ata_scsiop_noop - Command handler that simply returns success. 2151 * @args: device IDENTIFY data / SCSI command of interest. 2152 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2153 * 2154 * No operation. Simply returns success to caller, to indicate 2155 * that the caller should successfully complete this SCSI command. 2156 * 2157 * LOCKING: 2158 * spin_lock_irqsave(host lock) 2159 */ 2160 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) 2161 { 2162 VPRINTK("ENTER\n"); 2163 return 0; 2164 } 2165 2166 /** 2167 * ata_msense_caching - Simulate MODE SENSE caching info page 2168 * @id: device IDENTIFY data 2169 * @buf: output buffer 2170 * 2171 * Generate a caching info page, which conditionally indicates 2172 * write caching to the SCSI layer, depending on device 2173 * capabilities. 2174 * 2175 * LOCKING: 2176 * None. 2177 */ 2178 static unsigned int ata_msense_caching(u16 *id, u8 *buf) 2179 { 2180 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage)); 2181 if (ata_id_wcache_enabled(id)) 2182 buf[2] |= (1 << 2); /* write cache enable */ 2183 if (!ata_id_rahead_enabled(id)) 2184 buf[12] |= (1 << 5); /* disable read ahead */ 2185 return sizeof(def_cache_mpage); 2186 } 2187 2188 /** 2189 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page 2190 * @buf: output buffer 2191 * 2192 * Generate a generic MODE SENSE control mode page. 2193 * 2194 * LOCKING: 2195 * None. 2196 */ 2197 static unsigned int ata_msense_ctl_mode(u8 *buf) 2198 { 2199 memcpy(buf, def_control_mpage, sizeof(def_control_mpage)); 2200 return sizeof(def_control_mpage); 2201 } 2202 2203 /** 2204 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2205 * @buf: output buffer 2206 * 2207 * Generate a generic MODE SENSE r/w error recovery page. 2208 * 2209 * LOCKING: 2210 * None. 2211 */ 2212 static unsigned int ata_msense_rw_recovery(u8 *buf) 2213 { 2214 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage)); 2215 return sizeof(def_rw_recovery_mpage); 2216 } 2217 2218 /* 2219 * We can turn this into a real blacklist if it's needed, for now just 2220 * blacklist any Maxtor BANC1G10 revision firmware 2221 */ 2222 static int ata_dev_supports_fua(u16 *id) 2223 { 2224 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2225 2226 if (!libata_fua) 2227 return 0; 2228 if (!ata_id_has_fua(id)) 2229 return 0; 2230 2231 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2232 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2233 2234 if (strcmp(model, "Maxtor")) 2235 return 1; 2236 if (strcmp(fw, "BANC1G10")) 2237 return 1; 2238 2239 return 0; /* blacklisted */ 2240 } 2241 2242 /** 2243 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2244 * @args: device IDENTIFY data / SCSI command of interest. 2245 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2246 * 2247 * Simulate MODE SENSE commands. Assume this is invoked for direct 2248 * access devices (e.g. disks) only. There should be no block 2249 * descriptor for other device types. 2250 * 2251 * LOCKING: 2252 * spin_lock_irqsave(host lock) 2253 */ 2254 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2255 { 2256 struct ata_device *dev = args->dev; 2257 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2258 const u8 sat_blk_desc[] = { 2259 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2260 0, 2261 0, 0x2, 0x0 /* block length: 512 bytes */ 2262 }; 2263 u8 pg, spg; 2264 unsigned int ebd, page_control, six_byte; 2265 u8 dpofua; 2266 2267 VPRINTK("ENTER\n"); 2268 2269 six_byte = (scsicmd[0] == MODE_SENSE); 2270 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2271 /* 2272 * LLBA bit in msense(10) ignored (compliant) 2273 */ 2274 2275 page_control = scsicmd[2] >> 6; 2276 switch (page_control) { 2277 case 0: /* current */ 2278 break; /* supported */ 2279 case 3: /* saved */ 2280 goto saving_not_supp; 2281 case 1: /* changeable */ 2282 case 2: /* defaults */ 2283 default: 2284 goto invalid_fld; 2285 } 2286 2287 if (six_byte) 2288 p += 4 + (ebd ? 8 : 0); 2289 else 2290 p += 8 + (ebd ? 8 : 0); 2291 2292 pg = scsicmd[2] & 0x3f; 2293 spg = scsicmd[3]; 2294 /* 2295 * No mode subpages supported (yet) but asking for _all_ 2296 * subpages may be valid 2297 */ 2298 if (spg && (spg != ALL_SUB_MPAGES)) 2299 goto invalid_fld; 2300 2301 switch(pg) { 2302 case RW_RECOVERY_MPAGE: 2303 p += ata_msense_rw_recovery(p); 2304 break; 2305 2306 case CACHE_MPAGE: 2307 p += ata_msense_caching(args->id, p); 2308 break; 2309 2310 case CONTROL_MPAGE: 2311 p += ata_msense_ctl_mode(p); 2312 break; 2313 2314 case ALL_MPAGES: 2315 p += ata_msense_rw_recovery(p); 2316 p += ata_msense_caching(args->id, p); 2317 p += ata_msense_ctl_mode(p); 2318 break; 2319 2320 default: /* invalid page code */ 2321 goto invalid_fld; 2322 } 2323 2324 dpofua = 0; 2325 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2326 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2327 dpofua = 1 << 4; 2328 2329 if (six_byte) { 2330 rbuf[0] = p - rbuf - 1; 2331 rbuf[2] |= dpofua; 2332 if (ebd) { 2333 rbuf[3] = sizeof(sat_blk_desc); 2334 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2335 } 2336 } else { 2337 unsigned int output_len = p - rbuf - 2; 2338 2339 rbuf[0] = output_len >> 8; 2340 rbuf[1] = output_len; 2341 rbuf[3] |= dpofua; 2342 if (ebd) { 2343 rbuf[7] = sizeof(sat_blk_desc); 2344 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2345 } 2346 } 2347 return 0; 2348 2349 invalid_fld: 2350 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); 2351 /* "Invalid field in cbd" */ 2352 return 1; 2353 2354 saving_not_supp: 2355 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2356 /* "Saving parameters not supported" */ 2357 return 1; 2358 } 2359 2360 /** 2361 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2362 * @args: device IDENTIFY data / SCSI command of interest. 2363 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2364 * 2365 * Simulate READ CAPACITY commands. 2366 * 2367 * LOCKING: 2368 * None. 2369 */ 2370 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2371 { 2372 struct ata_device *dev = args->dev; 2373 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2374 u32 sector_size; /* physical sector size in bytes */ 2375 u8 log2_per_phys; 2376 u16 lowest_aligned; 2377 2378 sector_size = ata_id_logical_sector_size(dev->id); 2379 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2380 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2381 2382 VPRINTK("ENTER\n"); 2383 2384 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2385 if (last_lba >= 0xffffffffULL) 2386 last_lba = 0xffffffff; 2387 2388 /* sector count, 32-bit */ 2389 rbuf[0] = last_lba >> (8 * 3); 2390 rbuf[1] = last_lba >> (8 * 2); 2391 rbuf[2] = last_lba >> (8 * 1); 2392 rbuf[3] = last_lba; 2393 2394 /* sector size */ 2395 rbuf[4] = sector_size >> (8 * 3); 2396 rbuf[5] = sector_size >> (8 * 2); 2397 rbuf[6] = sector_size >> (8 * 1); 2398 rbuf[7] = sector_size; 2399 } else { 2400 /* sector count, 64-bit */ 2401 rbuf[0] = last_lba >> (8 * 7); 2402 rbuf[1] = last_lba >> (8 * 6); 2403 rbuf[2] = last_lba >> (8 * 5); 2404 rbuf[3] = last_lba >> (8 * 4); 2405 rbuf[4] = last_lba >> (8 * 3); 2406 rbuf[5] = last_lba >> (8 * 2); 2407 rbuf[6] = last_lba >> (8 * 1); 2408 rbuf[7] = last_lba; 2409 2410 /* sector size */ 2411 rbuf[ 8] = sector_size >> (8 * 3); 2412 rbuf[ 9] = sector_size >> (8 * 2); 2413 rbuf[10] = sector_size >> (8 * 1); 2414 rbuf[11] = sector_size; 2415 2416 rbuf[12] = 0; 2417 rbuf[13] = log2_per_phys; 2418 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2419 rbuf[15] = lowest_aligned; 2420 2421 if (ata_id_has_trim(args->id)) { 2422 rbuf[14] |= 0x80; /* TPE */ 2423 2424 if (ata_id_has_zero_after_trim(args->id)) 2425 rbuf[14] |= 0x40; /* TPRZ */ 2426 } 2427 } 2428 2429 return 0; 2430 } 2431 2432 /** 2433 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2434 * @args: device IDENTIFY data / SCSI command of interest. 2435 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2436 * 2437 * Simulate REPORT LUNS command. 2438 * 2439 * LOCKING: 2440 * spin_lock_irqsave(host lock) 2441 */ 2442 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2443 { 2444 VPRINTK("ENTER\n"); 2445 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2446 2447 return 0; 2448 } 2449 2450 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2451 { 2452 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2453 /* FIXME: not quite right; we don't want the 2454 * translation of taskfile registers into 2455 * a sense descriptors, since that's only 2456 * correct for ATA, not ATAPI 2457 */ 2458 ata_gen_passthru_sense(qc); 2459 } 2460 2461 qc->scsidone(qc->scsicmd); 2462 ata_qc_free(qc); 2463 } 2464 2465 /* is it pointless to prefer PIO for "safety reasons"? */ 2466 static inline int ata_pio_use_silly(struct ata_port *ap) 2467 { 2468 return (ap->flags & ATA_FLAG_PIO_DMA); 2469 } 2470 2471 static void atapi_request_sense(struct ata_queued_cmd *qc) 2472 { 2473 struct ata_port *ap = qc->ap; 2474 struct scsi_cmnd *cmd = qc->scsicmd; 2475 2476 DPRINTK("ATAPI request sense\n"); 2477 2478 /* FIXME: is this needed? */ 2479 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2480 2481 #ifdef CONFIG_ATA_SFF 2482 if (ap->ops->sff_tf_read) 2483 ap->ops->sff_tf_read(ap, &qc->tf); 2484 #endif 2485 2486 /* fill these in, for the case where they are -not- overwritten */ 2487 cmd->sense_buffer[0] = 0x70; 2488 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2489 2490 ata_qc_reinit(qc); 2491 2492 /* setup sg table and init transfer direction */ 2493 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2494 ata_sg_init(qc, &qc->sgent, 1); 2495 qc->dma_dir = DMA_FROM_DEVICE; 2496 2497 memset(&qc->cdb, 0, qc->dev->cdb_len); 2498 qc->cdb[0] = REQUEST_SENSE; 2499 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2500 2501 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2502 qc->tf.command = ATA_CMD_PACKET; 2503 2504 if (ata_pio_use_silly(ap)) { 2505 qc->tf.protocol = ATAPI_PROT_DMA; 2506 qc->tf.feature |= ATAPI_PKT_DMA; 2507 } else { 2508 qc->tf.protocol = ATAPI_PROT_PIO; 2509 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2510 qc->tf.lbah = 0; 2511 } 2512 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2513 2514 qc->complete_fn = atapi_sense_complete; 2515 2516 ata_qc_issue(qc); 2517 2518 DPRINTK("EXIT\n"); 2519 } 2520 2521 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2522 { 2523 struct scsi_cmnd *cmd = qc->scsicmd; 2524 unsigned int err_mask = qc->err_mask; 2525 2526 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2527 2528 /* handle completion from new EH */ 2529 if (unlikely(qc->ap->ops->error_handler && 2530 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2531 2532 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2533 /* FIXME: not quite right; we don't want the 2534 * translation of taskfile registers into a 2535 * sense descriptors, since that's only 2536 * correct for ATA, not ATAPI 2537 */ 2538 ata_gen_passthru_sense(qc); 2539 } 2540 2541 /* SCSI EH automatically locks door if sdev->locked is 2542 * set. Sometimes door lock request continues to 2543 * fail, for example, when no media is present. This 2544 * creates a loop - SCSI EH issues door lock which 2545 * fails and gets invoked again to acquire sense data 2546 * for the failed command. 2547 * 2548 * If door lock fails, always clear sdev->locked to 2549 * avoid this infinite loop. 2550 * 2551 * This may happen before SCSI scan is complete. Make 2552 * sure qc->dev->sdev isn't NULL before dereferencing. 2553 */ 2554 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2555 qc->dev->sdev->locked = 0; 2556 2557 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2558 qc->scsidone(cmd); 2559 ata_qc_free(qc); 2560 return; 2561 } 2562 2563 /* successful completion or old EH failure path */ 2564 if (unlikely(err_mask & AC_ERR_DEV)) { 2565 cmd->result = SAM_STAT_CHECK_CONDITION; 2566 atapi_request_sense(qc); 2567 return; 2568 } else if (unlikely(err_mask)) { 2569 /* FIXME: not quite right; we don't want the 2570 * translation of taskfile registers into 2571 * a sense descriptors, since that's only 2572 * correct for ATA, not ATAPI 2573 */ 2574 ata_gen_passthru_sense(qc); 2575 } else { 2576 u8 *scsicmd = cmd->cmnd; 2577 2578 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { 2579 unsigned long flags; 2580 u8 *buf; 2581 2582 buf = ata_scsi_rbuf_get(cmd, true, &flags); 2583 2584 /* ATAPI devices typically report zero for their SCSI version, 2585 * and sometimes deviate from the spec WRT response data 2586 * format. If SCSI version is reported as zero like normal, 2587 * then we make the following fixups: 1) Fake MMC-5 version, 2588 * to indicate to the Linux scsi midlayer this is a modern 2589 * device. 2) Ensure response data format / ATAPI information 2590 * are always correct. 2591 */ 2592 if (buf[2] == 0) { 2593 buf[2] = 0x5; 2594 buf[3] = 0x32; 2595 } 2596 2597 ata_scsi_rbuf_put(cmd, true, &flags); 2598 } 2599 2600 cmd->result = SAM_STAT_GOOD; 2601 } 2602 2603 qc->scsidone(cmd); 2604 ata_qc_free(qc); 2605 } 2606 /** 2607 * atapi_xlat - Initialize PACKET taskfile 2608 * @qc: command structure to be initialized 2609 * 2610 * LOCKING: 2611 * spin_lock_irqsave(host lock) 2612 * 2613 * RETURNS: 2614 * Zero on success, non-zero on failure. 2615 */ 2616 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2617 { 2618 struct scsi_cmnd *scmd = qc->scsicmd; 2619 struct ata_device *dev = qc->dev; 2620 int nodata = (scmd->sc_data_direction == DMA_NONE); 2621 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2622 unsigned int nbytes; 2623 2624 memset(qc->cdb, 0, dev->cdb_len); 2625 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2626 2627 qc->complete_fn = atapi_qc_complete; 2628 2629 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2630 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2631 qc->tf.flags |= ATA_TFLAG_WRITE; 2632 DPRINTK("direction: write\n"); 2633 } 2634 2635 qc->tf.command = ATA_CMD_PACKET; 2636 ata_qc_set_pc_nbytes(qc); 2637 2638 /* check whether ATAPI DMA is safe */ 2639 if (!nodata && !using_pio && atapi_check_dma(qc)) 2640 using_pio = 1; 2641 2642 /* Some controller variants snoop this value for Packet 2643 * transfers to do state machine and FIFO management. Thus we 2644 * want to set it properly, and for DMA where it is 2645 * effectively meaningless. 2646 */ 2647 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2648 2649 /* Most ATAPI devices which honor transfer chunk size don't 2650 * behave according to the spec when odd chunk size which 2651 * matches the transfer length is specified. If the number of 2652 * bytes to transfer is 2n+1. According to the spec, what 2653 * should happen is to indicate that 2n+1 is going to be 2654 * transferred and transfer 2n+2 bytes where the last byte is 2655 * padding. 2656 * 2657 * In practice, this doesn't happen. ATAPI devices first 2658 * indicate and transfer 2n bytes and then indicate and 2659 * transfer 2 bytes where the last byte is padding. 2660 * 2661 * This inconsistency confuses several controllers which 2662 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2663 * These controllers use actual number of transferred bytes to 2664 * update DMA poitner and transfer of 4n+2 bytes make those 2665 * controller push DMA pointer by 4n+4 bytes because SATA data 2666 * FISes are aligned to 4 bytes. This causes data corruption 2667 * and buffer overrun. 2668 * 2669 * Always setting nbytes to even number solves this problem 2670 * because then ATAPI devices don't have to split data at 2n 2671 * boundaries. 2672 */ 2673 if (nbytes & 0x1) 2674 nbytes++; 2675 2676 qc->tf.lbam = (nbytes & 0xFF); 2677 qc->tf.lbah = (nbytes >> 8); 2678 2679 if (nodata) 2680 qc->tf.protocol = ATAPI_PROT_NODATA; 2681 else if (using_pio) 2682 qc->tf.protocol = ATAPI_PROT_PIO; 2683 else { 2684 /* DMA data xfer */ 2685 qc->tf.protocol = ATAPI_PROT_DMA; 2686 qc->tf.feature |= ATAPI_PKT_DMA; 2687 2688 if ((dev->flags & ATA_DFLAG_DMADIR) && 2689 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2690 /* some SATA bridges need us to indicate data xfer direction */ 2691 qc->tf.feature |= ATAPI_DMADIR; 2692 } 2693 2694 2695 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2696 as ATAPI tape drives don't get this right otherwise */ 2697 return 0; 2698 } 2699 2700 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2701 { 2702 if (!sata_pmp_attached(ap)) { 2703 if (likely(devno < ata_link_max_devices(&ap->link))) 2704 return &ap->link.device[devno]; 2705 } else { 2706 if (likely(devno < ap->nr_pmp_links)) 2707 return &ap->pmp_link[devno].device[0]; 2708 } 2709 2710 return NULL; 2711 } 2712 2713 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2714 const struct scsi_device *scsidev) 2715 { 2716 int devno; 2717 2718 /* skip commands not addressed to targets we simulate */ 2719 if (!sata_pmp_attached(ap)) { 2720 if (unlikely(scsidev->channel || scsidev->lun)) 2721 return NULL; 2722 devno = scsidev->id; 2723 } else { 2724 if (unlikely(scsidev->id || scsidev->lun)) 2725 return NULL; 2726 devno = scsidev->channel; 2727 } 2728 2729 return ata_find_dev(ap, devno); 2730 } 2731 2732 /** 2733 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2734 * @ap: ATA port to which the device is attached 2735 * @scsidev: SCSI device from which we derive the ATA device 2736 * 2737 * Given various information provided in struct scsi_cmnd, 2738 * map that onto an ATA bus, and using that mapping 2739 * determine which ata_device is associated with the 2740 * SCSI command to be sent. 2741 * 2742 * LOCKING: 2743 * spin_lock_irqsave(host lock) 2744 * 2745 * RETURNS: 2746 * Associated ATA device, or %NULL if not found. 2747 */ 2748 static struct ata_device * 2749 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2750 { 2751 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2752 2753 if (unlikely(!dev || !ata_dev_enabled(dev))) 2754 return NULL; 2755 2756 return dev; 2757 } 2758 2759 /* 2760 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2761 * @byte1: Byte 1 from pass-thru CDB. 2762 * 2763 * RETURNS: 2764 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2765 */ 2766 static u8 2767 ata_scsi_map_proto(u8 byte1) 2768 { 2769 switch((byte1 & 0x1e) >> 1) { 2770 case 3: /* Non-data */ 2771 return ATA_PROT_NODATA; 2772 2773 case 6: /* DMA */ 2774 case 10: /* UDMA Data-in */ 2775 case 11: /* UDMA Data-Out */ 2776 return ATA_PROT_DMA; 2777 2778 case 4: /* PIO Data-in */ 2779 case 5: /* PIO Data-out */ 2780 return ATA_PROT_PIO; 2781 2782 case 0: /* Hard Reset */ 2783 case 1: /* SRST */ 2784 case 8: /* Device Diagnostic */ 2785 case 9: /* Device Reset */ 2786 case 7: /* DMA Queued */ 2787 case 12: /* FPDMA */ 2788 case 15: /* Return Response Info */ 2789 default: /* Reserved */ 2790 break; 2791 } 2792 2793 return ATA_PROT_UNKNOWN; 2794 } 2795 2796 /** 2797 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2798 * @qc: command structure to be initialized 2799 * 2800 * Handles either 12 or 16-byte versions of the CDB. 2801 * 2802 * RETURNS: 2803 * Zero on success, non-zero on failure. 2804 */ 2805 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2806 { 2807 struct ata_taskfile *tf = &(qc->tf); 2808 struct scsi_cmnd *scmd = qc->scsicmd; 2809 struct ata_device *dev = qc->dev; 2810 const u8 *cdb = scmd->cmnd; 2811 2812 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) 2813 goto invalid_fld; 2814 2815 /* 2816 * 12 and 16 byte CDBs use different offsets to 2817 * provide the various register values. 2818 */ 2819 if (cdb[0] == ATA_16) { 2820 /* 2821 * 16-byte CDB - may contain extended commands. 2822 * 2823 * If that is the case, copy the upper byte register values. 2824 */ 2825 if (cdb[1] & 0x01) { 2826 tf->hob_feature = cdb[3]; 2827 tf->hob_nsect = cdb[5]; 2828 tf->hob_lbal = cdb[7]; 2829 tf->hob_lbam = cdb[9]; 2830 tf->hob_lbah = cdb[11]; 2831 tf->flags |= ATA_TFLAG_LBA48; 2832 } else 2833 tf->flags &= ~ATA_TFLAG_LBA48; 2834 2835 /* 2836 * Always copy low byte, device and command registers. 2837 */ 2838 tf->feature = cdb[4]; 2839 tf->nsect = cdb[6]; 2840 tf->lbal = cdb[8]; 2841 tf->lbam = cdb[10]; 2842 tf->lbah = cdb[12]; 2843 tf->device = cdb[13]; 2844 tf->command = cdb[14]; 2845 } else { 2846 /* 2847 * 12-byte CDB - incapable of extended commands. 2848 */ 2849 tf->flags &= ~ATA_TFLAG_LBA48; 2850 2851 tf->feature = cdb[3]; 2852 tf->nsect = cdb[4]; 2853 tf->lbal = cdb[5]; 2854 tf->lbam = cdb[6]; 2855 tf->lbah = cdb[7]; 2856 tf->device = cdb[8]; 2857 tf->command = cdb[9]; 2858 } 2859 2860 /* enforce correct master/slave bit */ 2861 tf->device = dev->devno ? 2862 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2863 2864 switch (tf->command) { 2865 /* READ/WRITE LONG use a non-standard sect_size */ 2866 case ATA_CMD_READ_LONG: 2867 case ATA_CMD_READ_LONG_ONCE: 2868 case ATA_CMD_WRITE_LONG: 2869 case ATA_CMD_WRITE_LONG_ONCE: 2870 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) 2871 goto invalid_fld; 2872 qc->sect_size = scsi_bufflen(scmd); 2873 break; 2874 2875 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2876 case ATA_CMD_CFA_WRITE_NE: 2877 case ATA_CMD_CFA_TRANS_SECT: 2878 case ATA_CMD_CFA_WRITE_MULT_NE: 2879 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2880 case ATA_CMD_READ: 2881 case ATA_CMD_READ_EXT: 2882 case ATA_CMD_READ_QUEUED: 2883 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2884 case ATA_CMD_FPDMA_READ: 2885 case ATA_CMD_READ_MULTI: 2886 case ATA_CMD_READ_MULTI_EXT: 2887 case ATA_CMD_PIO_READ: 2888 case ATA_CMD_PIO_READ_EXT: 2889 case ATA_CMD_READ_STREAM_DMA_EXT: 2890 case ATA_CMD_READ_STREAM_EXT: 2891 case ATA_CMD_VERIFY: 2892 case ATA_CMD_VERIFY_EXT: 2893 case ATA_CMD_WRITE: 2894 case ATA_CMD_WRITE_EXT: 2895 case ATA_CMD_WRITE_FUA_EXT: 2896 case ATA_CMD_WRITE_QUEUED: 2897 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2898 case ATA_CMD_FPDMA_WRITE: 2899 case ATA_CMD_WRITE_MULTI: 2900 case ATA_CMD_WRITE_MULTI_EXT: 2901 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2902 case ATA_CMD_PIO_WRITE: 2903 case ATA_CMD_PIO_WRITE_EXT: 2904 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2905 case ATA_CMD_WRITE_STREAM_EXT: 2906 qc->sect_size = scmd->device->sector_size; 2907 break; 2908 2909 /* Everything else uses 512 byte "sectors" */ 2910 default: 2911 qc->sect_size = ATA_SECT_SIZE; 2912 } 2913 2914 /* 2915 * Set flags so that all registers will be written, pass on 2916 * write indication (used for PIO/DMA setup), result TF is 2917 * copied back and we don't whine too much about its failure. 2918 */ 2919 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2920 if (scmd->sc_data_direction == DMA_TO_DEVICE) 2921 tf->flags |= ATA_TFLAG_WRITE; 2922 2923 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 2924 2925 /* 2926 * Set transfer length. 2927 * 2928 * TODO: find out if we need to do more here to 2929 * cover scatter/gather case. 2930 */ 2931 ata_qc_set_pc_nbytes(qc); 2932 2933 /* We may not issue DMA commands if no DMA mode is set */ 2934 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) 2935 goto invalid_fld; 2936 2937 /* sanity check for pio multi commands */ 2938 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) 2939 goto invalid_fld; 2940 2941 if (is_multi_taskfile(tf)) { 2942 unsigned int multi_count = 1 << (cdb[1] >> 5); 2943 2944 /* compare the passed through multi_count 2945 * with the cached multi_count of libata 2946 */ 2947 if (multi_count != dev->multi_count) 2948 ata_dev_printk(dev, KERN_WARNING, 2949 "invalid multi_count %u ignored\n", 2950 multi_count); 2951 } 2952 2953 /* 2954 * Filter SET_FEATURES - XFER MODE command -- otherwise, 2955 * SET_FEATURES - XFER MODE must be preceded/succeeded 2956 * by an update to hardware-specific registers for each 2957 * controller (i.e. the reason for ->set_piomode(), 2958 * ->set_dmamode(), and ->post_set_mode() hooks). 2959 */ 2960 if (tf->command == ATA_CMD_SET_FEATURES && 2961 tf->feature == SETFEATURES_XFER) 2962 goto invalid_fld; 2963 2964 /* 2965 * Filter TPM commands by default. These provide an 2966 * essentially uncontrolled encrypted "back door" between 2967 * applications and the disk. Set libata.allow_tpm=1 if you 2968 * have a real reason for wanting to use them. This ensures 2969 * that installed software cannot easily mess stuff up without 2970 * user intent. DVR type users will probably ship with this enabled 2971 * for movie content management. 2972 * 2973 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 2974 * for this and should do in future but that it is not sufficient as 2975 * DCS is an optional feature set. Thus we also do the software filter 2976 * so that we comply with the TC consortium stated goal that the user 2977 * can turn off TC features of their system. 2978 */ 2979 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) 2980 goto invalid_fld; 2981 2982 return 0; 2983 2984 invalid_fld: 2985 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); 2986 /* "Invalid field in cdb" */ 2987 return 1; 2988 } 2989 2990 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 2991 { 2992 struct ata_taskfile *tf = &qc->tf; 2993 struct scsi_cmnd *scmd = qc->scsicmd; 2994 struct ata_device *dev = qc->dev; 2995 const u8 *cdb = scmd->cmnd; 2996 u64 block; 2997 u32 n_block; 2998 u32 size; 2999 void *buf; 3000 3001 /* we may not issue DMA commands if no DMA mode is set */ 3002 if (unlikely(!dev->dma_mode)) 3003 goto invalid_fld; 3004 3005 if (unlikely(scmd->cmd_len < 16)) 3006 goto invalid_fld; 3007 scsi_16_lba_len(cdb, &block, &n_block); 3008 3009 /* for now we only support WRITE SAME with the unmap bit set */ 3010 if (unlikely(!(cdb[1] & 0x8))) 3011 goto invalid_fld; 3012 3013 /* 3014 * WRITE SAME always has a sector sized buffer as payload, this 3015 * should never be a multiple entry S/G list. 3016 */ 3017 if (!scsi_sg_count(scmd)) 3018 goto invalid_fld; 3019 3020 buf = page_address(sg_page(scsi_sglist(scmd))); 3021 size = ata_set_lba_range_entries(buf, 512, block, n_block); 3022 3023 tf->protocol = ATA_PROT_DMA; 3024 tf->hob_feature = 0; 3025 tf->feature = ATA_DSM_TRIM; 3026 tf->hob_nsect = (size / 512) >> 8; 3027 tf->nsect = size / 512; 3028 tf->command = ATA_CMD_DSM; 3029 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3030 ATA_TFLAG_WRITE; 3031 3032 ata_qc_set_pc_nbytes(qc); 3033 3034 return 0; 3035 3036 invalid_fld: 3037 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); 3038 /* "Invalid field in cdb" */ 3039 return 1; 3040 } 3041 3042 /** 3043 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3044 * @dev: ATA device 3045 * @cmd: SCSI command opcode to consider 3046 * 3047 * Look up the SCSI command given, and determine whether the 3048 * SCSI command is to be translated or simulated. 3049 * 3050 * RETURNS: 3051 * Pointer to translation function if possible, %NULL if not. 3052 */ 3053 3054 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3055 { 3056 switch (cmd) { 3057 case READ_6: 3058 case READ_10: 3059 case READ_16: 3060 3061 case WRITE_6: 3062 case WRITE_10: 3063 case WRITE_16: 3064 return ata_scsi_rw_xlat; 3065 3066 case WRITE_SAME_16: 3067 return ata_scsi_write_same_xlat; 3068 3069 case SYNCHRONIZE_CACHE: 3070 if (ata_try_flush_cache(dev)) 3071 return ata_scsi_flush_xlat; 3072 break; 3073 3074 case VERIFY: 3075 case VERIFY_16: 3076 return ata_scsi_verify_xlat; 3077 3078 case ATA_12: 3079 case ATA_16: 3080 return ata_scsi_pass_thru; 3081 3082 case START_STOP: 3083 return ata_scsi_start_stop_xlat; 3084 } 3085 3086 return NULL; 3087 } 3088 3089 /** 3090 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 3091 * @ap: ATA port to which the command was being sent 3092 * @cmd: SCSI command to dump 3093 * 3094 * Prints the contents of a SCSI command via printk(). 3095 */ 3096 3097 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 3098 struct scsi_cmnd *cmd) 3099 { 3100 #ifdef ATA_DEBUG 3101 struct scsi_device *scsidev = cmd->device; 3102 u8 *scsicmd = cmd->cmnd; 3103 3104 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 3105 ap->print_id, 3106 scsidev->channel, scsidev->id, scsidev->lun, 3107 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], 3108 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], 3109 scsicmd[8]); 3110 #endif 3111 } 3112 3113 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 3114 struct ata_device *dev) 3115 { 3116 u8 scsi_op = scmd->cmnd[0]; 3117 ata_xlat_func_t xlat_func; 3118 int rc = 0; 3119 3120 if (dev->class == ATA_DEV_ATA) { 3121 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 3122 goto bad_cdb_len; 3123 3124 xlat_func = ata_get_xlat_func(dev, scsi_op); 3125 } else { 3126 if (unlikely(!scmd->cmd_len)) 3127 goto bad_cdb_len; 3128 3129 xlat_func = NULL; 3130 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3131 /* relay SCSI command to ATAPI device */ 3132 int len = COMMAND_SIZE(scsi_op); 3133 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 3134 goto bad_cdb_len; 3135 3136 xlat_func = atapi_xlat; 3137 } else { 3138 /* ATA_16 passthru, treat as an ATA command */ 3139 if (unlikely(scmd->cmd_len > 16)) 3140 goto bad_cdb_len; 3141 3142 xlat_func = ata_get_xlat_func(dev, scsi_op); 3143 } 3144 } 3145 3146 if (xlat_func) 3147 rc = ata_scsi_translate(dev, scmd, xlat_func); 3148 else 3149 ata_scsi_simulate(dev, scmd); 3150 3151 return rc; 3152 3153 bad_cdb_len: 3154 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 3155 scmd->cmd_len, scsi_op, dev->cdb_len); 3156 scmd->result = DID_ERROR << 16; 3157 scmd->scsi_done(scmd); 3158 return 0; 3159 } 3160 3161 /** 3162 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 3163 * @shost: SCSI host of command to be sent 3164 * @cmd: SCSI command to be sent 3165 * 3166 * In some cases, this function translates SCSI commands into 3167 * ATA taskfiles, and queues the taskfiles to be sent to 3168 * hardware. In other cases, this function simulates a 3169 * SCSI device by evaluating and responding to certain 3170 * SCSI commands. This creates the overall effect of 3171 * ATA and ATAPI devices appearing as SCSI devices. 3172 * 3173 * LOCKING: 3174 * ATA host lock 3175 * 3176 * RETURNS: 3177 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 3178 * 0 otherwise. 3179 */ 3180 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 3181 { 3182 struct ata_port *ap; 3183 struct ata_device *dev; 3184 struct scsi_device *scsidev = cmd->device; 3185 int rc = 0; 3186 unsigned long irq_flags; 3187 3188 ap = ata_shost_to_port(shost); 3189 3190 spin_lock_irqsave(ap->lock, irq_flags); 3191 3192 ata_scsi_dump_cdb(ap, cmd); 3193 3194 dev = ata_scsi_find_dev(ap, scsidev); 3195 if (likely(dev)) 3196 rc = __ata_scsi_queuecmd(cmd, dev); 3197 else { 3198 cmd->result = (DID_BAD_TARGET << 16); 3199 cmd->scsi_done(cmd); 3200 } 3201 3202 spin_unlock_irqrestore(ap->lock, irq_flags); 3203 3204 return rc; 3205 } 3206 3207 /** 3208 * ata_scsi_simulate - simulate SCSI command on ATA device 3209 * @dev: the target device 3210 * @cmd: SCSI command being sent to device. 3211 * 3212 * Interprets and directly executes a select list of SCSI commands 3213 * that can be handled internally. 3214 * 3215 * LOCKING: 3216 * spin_lock_irqsave(host lock) 3217 */ 3218 3219 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 3220 { 3221 struct ata_scsi_args args; 3222 const u8 *scsicmd = cmd->cmnd; 3223 u8 tmp8; 3224 3225 args.dev = dev; 3226 args.id = dev->id; 3227 args.cmd = cmd; 3228 args.done = cmd->scsi_done; 3229 3230 switch(scsicmd[0]) { 3231 /* TODO: worth improving? */ 3232 case FORMAT_UNIT: 3233 ata_scsi_invalid_field(cmd); 3234 break; 3235 3236 case INQUIRY: 3237 if (scsicmd[1] & 2) /* is CmdDt set? */ 3238 ata_scsi_invalid_field(cmd); 3239 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 3240 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 3241 else switch (scsicmd[2]) { 3242 case 0x00: 3243 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 3244 break; 3245 case 0x80: 3246 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 3247 break; 3248 case 0x83: 3249 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 3250 break; 3251 case 0x89: 3252 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 3253 break; 3254 case 0xb0: 3255 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 3256 break; 3257 case 0xb1: 3258 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 3259 break; 3260 case 0xb2: 3261 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 3262 break; 3263 default: 3264 ata_scsi_invalid_field(cmd); 3265 break; 3266 } 3267 break; 3268 3269 case MODE_SENSE: 3270 case MODE_SENSE_10: 3271 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 3272 break; 3273 3274 case MODE_SELECT: /* unconditionally return */ 3275 case MODE_SELECT_10: /* bad-field-in-cdb */ 3276 ata_scsi_invalid_field(cmd); 3277 break; 3278 3279 case READ_CAPACITY: 3280 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 3281 break; 3282 3283 case SERVICE_ACTION_IN: 3284 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 3285 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 3286 else 3287 ata_scsi_invalid_field(cmd); 3288 break; 3289 3290 case REPORT_LUNS: 3291 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 3292 break; 3293 3294 case REQUEST_SENSE: 3295 ata_scsi_set_sense(cmd, 0, 0, 0); 3296 cmd->result = (DRIVER_SENSE << 24); 3297 cmd->scsi_done(cmd); 3298 break; 3299 3300 /* if we reach this, then writeback caching is disabled, 3301 * turning this into a no-op. 3302 */ 3303 case SYNCHRONIZE_CACHE: 3304 /* fall through */ 3305 3306 /* no-op's, complete with success */ 3307 case REZERO_UNIT: 3308 case SEEK_6: 3309 case SEEK_10: 3310 case TEST_UNIT_READY: 3311 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 3312 break; 3313 3314 case SEND_DIAGNOSTIC: 3315 tmp8 = scsicmd[1] & ~(1 << 3); 3316 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) 3317 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 3318 else 3319 ata_scsi_invalid_field(cmd); 3320 break; 3321 3322 /* all other commands */ 3323 default: 3324 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); 3325 /* "Invalid command operation code" */ 3326 cmd->scsi_done(cmd); 3327 break; 3328 } 3329 } 3330 3331 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 3332 { 3333 int i, rc; 3334 3335 for (i = 0; i < host->n_ports; i++) { 3336 struct ata_port *ap = host->ports[i]; 3337 struct Scsi_Host *shost; 3338 3339 rc = -ENOMEM; 3340 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 3341 if (!shost) 3342 goto err_alloc; 3343 3344 *(struct ata_port **)&shost->hostdata[0] = ap; 3345 ap->scsi_host = shost; 3346 3347 shost->transportt = ata_scsi_transport_template; 3348 shost->unique_id = ap->print_id; 3349 shost->max_id = 16; 3350 shost->max_lun = 1; 3351 shost->max_channel = 1; 3352 shost->max_cmd_len = 16; 3353 3354 /* Schedule policy is determined by ->qc_defer() 3355 * callback and it needs to see every deferred qc. 3356 * Set host_blocked to 1 to prevent SCSI midlayer from 3357 * automatically deferring requests. 3358 */ 3359 shost->max_host_blocked = 1; 3360 3361 rc = scsi_add_host(ap->scsi_host, ap->host->dev); 3362 if (rc) 3363 goto err_add; 3364 } 3365 3366 return 0; 3367 3368 err_add: 3369 scsi_host_put(host->ports[i]->scsi_host); 3370 err_alloc: 3371 while (--i >= 0) { 3372 struct Scsi_Host *shost = host->ports[i]->scsi_host; 3373 3374 scsi_remove_host(shost); 3375 scsi_host_put(shost); 3376 } 3377 return rc; 3378 } 3379 3380 void ata_scsi_scan_host(struct ata_port *ap, int sync) 3381 { 3382 int tries = 5; 3383 struct ata_device *last_failed_dev = NULL; 3384 struct ata_link *link; 3385 struct ata_device *dev; 3386 3387 repeat: 3388 ata_for_each_link(link, ap, EDGE) { 3389 ata_for_each_dev(dev, link, ENABLED) { 3390 struct scsi_device *sdev; 3391 int channel = 0, id = 0; 3392 3393 if (dev->sdev) 3394 continue; 3395 3396 if (ata_is_host_link(link)) 3397 id = dev->devno; 3398 else 3399 channel = link->pmp; 3400 3401 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 3402 NULL); 3403 if (!IS_ERR(sdev)) { 3404 dev->sdev = sdev; 3405 scsi_device_put(sdev); 3406 } else { 3407 dev->sdev = NULL; 3408 } 3409 } 3410 } 3411 3412 /* If we scanned while EH was in progress or allocation 3413 * failure occurred, scan would have failed silently. Check 3414 * whether all devices are attached. 3415 */ 3416 ata_for_each_link(link, ap, EDGE) { 3417 ata_for_each_dev(dev, link, ENABLED) { 3418 if (!dev->sdev) 3419 goto exit_loop; 3420 } 3421 } 3422 exit_loop: 3423 if (!link) 3424 return; 3425 3426 /* we're missing some SCSI devices */ 3427 if (sync) { 3428 /* If caller requested synchrnous scan && we've made 3429 * any progress, sleep briefly and repeat. 3430 */ 3431 if (dev != last_failed_dev) { 3432 msleep(100); 3433 last_failed_dev = dev; 3434 goto repeat; 3435 } 3436 3437 /* We might be failing to detect boot device, give it 3438 * a few more chances. 3439 */ 3440 if (--tries) { 3441 msleep(100); 3442 goto repeat; 3443 } 3444 3445 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " 3446 "failed without making any progress,\n" 3447 " switching to async\n"); 3448 } 3449 3450 queue_delayed_work(system_long_wq, &ap->hotplug_task, 3451 round_jiffies_relative(HZ)); 3452 } 3453 3454 /** 3455 * ata_scsi_offline_dev - offline attached SCSI device 3456 * @dev: ATA device to offline attached SCSI device for 3457 * 3458 * This function is called from ata_eh_hotplug() and responsible 3459 * for taking the SCSI device attached to @dev offline. This 3460 * function is called with host lock which protects dev->sdev 3461 * against clearing. 3462 * 3463 * LOCKING: 3464 * spin_lock_irqsave(host lock) 3465 * 3466 * RETURNS: 3467 * 1 if attached SCSI device exists, 0 otherwise. 3468 */ 3469 int ata_scsi_offline_dev(struct ata_device *dev) 3470 { 3471 if (dev->sdev) { 3472 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 3473 return 1; 3474 } 3475 return 0; 3476 } 3477 3478 /** 3479 * ata_scsi_remove_dev - remove attached SCSI device 3480 * @dev: ATA device to remove attached SCSI device for 3481 * 3482 * This function is called from ata_eh_scsi_hotplug() and 3483 * responsible for removing the SCSI device attached to @dev. 3484 * 3485 * LOCKING: 3486 * Kernel thread context (may sleep). 3487 */ 3488 static void ata_scsi_remove_dev(struct ata_device *dev) 3489 { 3490 struct ata_port *ap = dev->link->ap; 3491 struct scsi_device *sdev; 3492 unsigned long flags; 3493 3494 /* Alas, we need to grab scan_mutex to ensure SCSI device 3495 * state doesn't change underneath us and thus 3496 * scsi_device_get() always succeeds. The mutex locking can 3497 * be removed if there is __scsi_device_get() interface which 3498 * increments reference counts regardless of device state. 3499 */ 3500 mutex_lock(&ap->scsi_host->scan_mutex); 3501 spin_lock_irqsave(ap->lock, flags); 3502 3503 /* clearing dev->sdev is protected by host lock */ 3504 sdev = dev->sdev; 3505 dev->sdev = NULL; 3506 3507 if (sdev) { 3508 /* If user initiated unplug races with us, sdev can go 3509 * away underneath us after the host lock and 3510 * scan_mutex are released. Hold onto it. 3511 */ 3512 if (scsi_device_get(sdev) == 0) { 3513 /* The following ensures the attached sdev is 3514 * offline on return from ata_scsi_offline_dev() 3515 * regardless it wins or loses the race 3516 * against this function. 3517 */ 3518 scsi_device_set_state(sdev, SDEV_OFFLINE); 3519 } else { 3520 WARN_ON(1); 3521 sdev = NULL; 3522 } 3523 } 3524 3525 spin_unlock_irqrestore(ap->lock, flags); 3526 mutex_unlock(&ap->scsi_host->scan_mutex); 3527 3528 if (sdev) { 3529 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", 3530 dev_name(&sdev->sdev_gendev)); 3531 3532 scsi_remove_device(sdev); 3533 scsi_device_put(sdev); 3534 } 3535 } 3536 3537 static void ata_scsi_handle_link_detach(struct ata_link *link) 3538 { 3539 struct ata_port *ap = link->ap; 3540 struct ata_device *dev; 3541 3542 ata_for_each_dev(dev, link, ALL) { 3543 unsigned long flags; 3544 3545 if (!(dev->flags & ATA_DFLAG_DETACHED)) 3546 continue; 3547 3548 spin_lock_irqsave(ap->lock, flags); 3549 dev->flags &= ~ATA_DFLAG_DETACHED; 3550 spin_unlock_irqrestore(ap->lock, flags); 3551 3552 ata_scsi_remove_dev(dev); 3553 } 3554 } 3555 3556 /** 3557 * ata_scsi_media_change_notify - send media change event 3558 * @dev: Pointer to the disk device with media change event 3559 * 3560 * Tell the block layer to send a media change notification 3561 * event. 3562 * 3563 * LOCKING: 3564 * spin_lock_irqsave(host lock) 3565 */ 3566 void ata_scsi_media_change_notify(struct ata_device *dev) 3567 { 3568 if (dev->sdev) 3569 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 3570 GFP_ATOMIC); 3571 } 3572 3573 /** 3574 * ata_scsi_hotplug - SCSI part of hotplug 3575 * @work: Pointer to ATA port to perform SCSI hotplug on 3576 * 3577 * Perform SCSI part of hotplug. It's executed from a separate 3578 * workqueue after EH completes. This is necessary because SCSI 3579 * hot plugging requires working EH and hot unplugging is 3580 * synchronized with hot plugging with a mutex. 3581 * 3582 * LOCKING: 3583 * Kernel thread context (may sleep). 3584 */ 3585 void ata_scsi_hotplug(struct work_struct *work) 3586 { 3587 struct ata_port *ap = 3588 container_of(work, struct ata_port, hotplug_task.work); 3589 int i; 3590 3591 if (ap->pflags & ATA_PFLAG_UNLOADING) { 3592 DPRINTK("ENTER/EXIT - unloading\n"); 3593 return; 3594 } 3595 3596 DPRINTK("ENTER\n"); 3597 mutex_lock(&ap->scsi_scan_mutex); 3598 3599 /* Unplug detached devices. We cannot use link iterator here 3600 * because PMP links have to be scanned even if PMP is 3601 * currently not attached. Iterate manually. 3602 */ 3603 ata_scsi_handle_link_detach(&ap->link); 3604 if (ap->pmp_link) 3605 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 3606 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 3607 3608 /* scan for new ones */ 3609 ata_scsi_scan_host(ap, 0); 3610 3611 mutex_unlock(&ap->scsi_scan_mutex); 3612 DPRINTK("EXIT\n"); 3613 } 3614 3615 /** 3616 * ata_scsi_user_scan - indication for user-initiated bus scan 3617 * @shost: SCSI host to scan 3618 * @channel: Channel to scan 3619 * @id: ID to scan 3620 * @lun: LUN to scan 3621 * 3622 * This function is called when user explicitly requests bus 3623 * scan. Set probe pending flag and invoke EH. 3624 * 3625 * LOCKING: 3626 * SCSI layer (we don't care) 3627 * 3628 * RETURNS: 3629 * Zero. 3630 */ 3631 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 3632 unsigned int id, unsigned int lun) 3633 { 3634 struct ata_port *ap = ata_shost_to_port(shost); 3635 unsigned long flags; 3636 int devno, rc = 0; 3637 3638 if (!ap->ops->error_handler) 3639 return -EOPNOTSUPP; 3640 3641 if (lun != SCAN_WILD_CARD && lun) 3642 return -EINVAL; 3643 3644 if (!sata_pmp_attached(ap)) { 3645 if (channel != SCAN_WILD_CARD && channel) 3646 return -EINVAL; 3647 devno = id; 3648 } else { 3649 if (id != SCAN_WILD_CARD && id) 3650 return -EINVAL; 3651 devno = channel; 3652 } 3653 3654 spin_lock_irqsave(ap->lock, flags); 3655 3656 if (devno == SCAN_WILD_CARD) { 3657 struct ata_link *link; 3658 3659 ata_for_each_link(link, ap, EDGE) { 3660 struct ata_eh_info *ehi = &link->eh_info; 3661 ehi->probe_mask |= ATA_ALL_DEVICES; 3662 ehi->action |= ATA_EH_RESET; 3663 } 3664 } else { 3665 struct ata_device *dev = ata_find_dev(ap, devno); 3666 3667 if (dev) { 3668 struct ata_eh_info *ehi = &dev->link->eh_info; 3669 ehi->probe_mask |= 1 << dev->devno; 3670 ehi->action |= ATA_EH_RESET; 3671 } else 3672 rc = -EINVAL; 3673 } 3674 3675 if (rc == 0) { 3676 ata_port_schedule_eh(ap); 3677 spin_unlock_irqrestore(ap->lock, flags); 3678 ata_port_wait_eh(ap); 3679 } else 3680 spin_unlock_irqrestore(ap->lock, flags); 3681 3682 return rc; 3683 } 3684 3685 /** 3686 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 3687 * @work: Pointer to ATA port to perform scsi_rescan_device() 3688 * 3689 * After ATA pass thru (SAT) commands are executed successfully, 3690 * libata need to propagate the changes to SCSI layer. 3691 * 3692 * LOCKING: 3693 * Kernel thread context (may sleep). 3694 */ 3695 void ata_scsi_dev_rescan(struct work_struct *work) 3696 { 3697 struct ata_port *ap = 3698 container_of(work, struct ata_port, scsi_rescan_task); 3699 struct ata_link *link; 3700 struct ata_device *dev; 3701 unsigned long flags; 3702 3703 mutex_lock(&ap->scsi_scan_mutex); 3704 spin_lock_irqsave(ap->lock, flags); 3705 3706 ata_for_each_link(link, ap, EDGE) { 3707 ata_for_each_dev(dev, link, ENABLED) { 3708 struct scsi_device *sdev = dev->sdev; 3709 3710 if (!sdev) 3711 continue; 3712 if (scsi_device_get(sdev)) 3713 continue; 3714 3715 spin_unlock_irqrestore(ap->lock, flags); 3716 scsi_rescan_device(&(sdev->sdev_gendev)); 3717 scsi_device_put(sdev); 3718 spin_lock_irqsave(ap->lock, flags); 3719 } 3720 } 3721 3722 spin_unlock_irqrestore(ap->lock, flags); 3723 mutex_unlock(&ap->scsi_scan_mutex); 3724 } 3725 3726 /** 3727 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 3728 * @host: ATA host container for all SAS ports 3729 * @port_info: Information from low-level host driver 3730 * @shost: SCSI host that the scsi device is attached to 3731 * 3732 * LOCKING: 3733 * PCI/etc. bus probe sem. 3734 * 3735 * RETURNS: 3736 * ata_port pointer on success / NULL on failure. 3737 */ 3738 3739 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 3740 struct ata_port_info *port_info, 3741 struct Scsi_Host *shost) 3742 { 3743 struct ata_port *ap; 3744 3745 ap = ata_port_alloc(host); 3746 if (!ap) 3747 return NULL; 3748 3749 ap->port_no = 0; 3750 ap->lock = shost->host_lock; 3751 ap->pio_mask = port_info->pio_mask; 3752 ap->mwdma_mask = port_info->mwdma_mask; 3753 ap->udma_mask = port_info->udma_mask; 3754 ap->flags |= port_info->flags; 3755 ap->ops = port_info->port_ops; 3756 ap->cbl = ATA_CBL_SATA; 3757 3758 return ap; 3759 } 3760 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 3761 3762 /** 3763 * ata_sas_port_start - Set port up for dma. 3764 * @ap: Port to initialize 3765 * 3766 * Called just after data structures for each port are 3767 * initialized. 3768 * 3769 * May be used as the port_start() entry in ata_port_operations. 3770 * 3771 * LOCKING: 3772 * Inherited from caller. 3773 */ 3774 int ata_sas_port_start(struct ata_port *ap) 3775 { 3776 return 0; 3777 } 3778 EXPORT_SYMBOL_GPL(ata_sas_port_start); 3779 3780 /** 3781 * ata_port_stop - Undo ata_sas_port_start() 3782 * @ap: Port to shut down 3783 * 3784 * May be used as the port_stop() entry in ata_port_operations. 3785 * 3786 * LOCKING: 3787 * Inherited from caller. 3788 */ 3789 3790 void ata_sas_port_stop(struct ata_port *ap) 3791 { 3792 } 3793 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 3794 3795 /** 3796 * ata_sas_port_init - Initialize a SATA device 3797 * @ap: SATA port to initialize 3798 * 3799 * LOCKING: 3800 * PCI/etc. bus probe sem. 3801 * 3802 * RETURNS: 3803 * Zero on success, non-zero on error. 3804 */ 3805 3806 int ata_sas_port_init(struct ata_port *ap) 3807 { 3808 int rc = ap->ops->port_start(ap); 3809 3810 if (!rc) { 3811 ap->print_id = ata_print_id++; 3812 rc = ata_bus_probe(ap); 3813 } 3814 3815 return rc; 3816 } 3817 EXPORT_SYMBOL_GPL(ata_sas_port_init); 3818 3819 /** 3820 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 3821 * @ap: SATA port to destroy 3822 * 3823 */ 3824 3825 void ata_sas_port_destroy(struct ata_port *ap) 3826 { 3827 if (ap->ops->port_stop) 3828 ap->ops->port_stop(ap); 3829 kfree(ap); 3830 } 3831 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 3832 3833 /** 3834 * ata_sas_slave_configure - Default slave_config routine for libata devices 3835 * @sdev: SCSI device to configure 3836 * @ap: ATA port to which SCSI device is attached 3837 * 3838 * RETURNS: 3839 * Zero. 3840 */ 3841 3842 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 3843 { 3844 ata_scsi_sdev_config(sdev); 3845 ata_scsi_dev_config(sdev, ap->link.device); 3846 return 0; 3847 } 3848 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 3849 3850 /** 3851 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 3852 * @cmd: SCSI command to be sent 3853 * @ap: ATA port to which the command is being sent 3854 * 3855 * RETURNS: 3856 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 3857 * 0 otherwise. 3858 */ 3859 3860 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 3861 { 3862 int rc = 0; 3863 3864 ata_scsi_dump_cdb(ap, cmd); 3865 3866 if (likely(ata_dev_enabled(ap->link.device))) 3867 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 3868 else { 3869 cmd->result = (DID_BAD_TARGET << 16); 3870 cmd->scsi_done(cmd); 3871 } 3872 return rc; 3873 } 3874 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 3875