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 void (*done)(struct scsi_cmnd *)) 351 { 352 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); 353 /* "Invalid field in cbd" */ 354 done(cmd); 355 } 356 357 /** 358 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 359 * @sdev: SCSI device for which BIOS geometry is to be determined 360 * @bdev: block device associated with @sdev 361 * @capacity: capacity of SCSI device 362 * @geom: location to which geometry will be output 363 * 364 * Generic bios head/sector/cylinder calculator 365 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 366 * mapping. Some situations may arise where the disk is not 367 * bootable if this is not used. 368 * 369 * LOCKING: 370 * Defined by the SCSI layer. We don't really care. 371 * 372 * RETURNS: 373 * Zero. 374 */ 375 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 376 sector_t capacity, int geom[]) 377 { 378 geom[0] = 255; 379 geom[1] = 63; 380 sector_div(capacity, 255*63); 381 geom[2] = capacity; 382 383 return 0; 384 } 385 386 /** 387 * ata_scsi_unlock_native_capacity - unlock native capacity 388 * @sdev: SCSI device to adjust device capacity for 389 * 390 * This function is called if a partition on @sdev extends beyond 391 * the end of the device. It requests EH to unlock HPA. 392 * 393 * LOCKING: 394 * Defined by the SCSI layer. Might sleep. 395 */ 396 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 397 { 398 struct ata_port *ap = ata_shost_to_port(sdev->host); 399 struct ata_device *dev; 400 unsigned long flags; 401 402 spin_lock_irqsave(ap->lock, flags); 403 404 dev = ata_scsi_find_dev(ap, sdev); 405 if (dev && dev->n_sectors < dev->n_native_sectors) { 406 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 407 dev->link->eh_info.action |= ATA_EH_RESET; 408 ata_port_schedule_eh(ap); 409 } 410 411 spin_unlock_irqrestore(ap->lock, flags); 412 ata_port_wait_eh(ap); 413 } 414 415 /** 416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 417 * @ap: target port 418 * @sdev: SCSI device to get identify data for 419 * @arg: User buffer area for identify data 420 * 421 * LOCKING: 422 * Defined by the SCSI layer. We don't really care. 423 * 424 * RETURNS: 425 * Zero on success, negative errno on error. 426 */ 427 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 428 void __user *arg) 429 { 430 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 431 u16 __user *dst = arg; 432 char buf[40]; 433 434 if (!dev) 435 return -ENOMSG; 436 437 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 438 return -EFAULT; 439 440 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 441 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 442 return -EFAULT; 443 444 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 445 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 446 return -EFAULT; 447 448 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 449 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 450 return -EFAULT; 451 452 return 0; 453 } 454 455 /** 456 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 457 * @scsidev: Device to which we are issuing command 458 * @arg: User provided data for issuing command 459 * 460 * LOCKING: 461 * Defined by the SCSI layer. We don't really care. 462 * 463 * RETURNS: 464 * Zero on success, negative errno on error. 465 */ 466 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 467 { 468 int rc = 0; 469 u8 scsi_cmd[MAX_COMMAND_SIZE]; 470 u8 args[4], *argbuf = NULL, *sensebuf = NULL; 471 int argsize = 0; 472 enum dma_data_direction data_dir; 473 int cmd_result; 474 475 if (arg == NULL) 476 return -EINVAL; 477 478 if (copy_from_user(args, arg, sizeof(args))) 479 return -EFAULT; 480 481 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 482 if (!sensebuf) 483 return -ENOMEM; 484 485 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 486 487 if (args[3]) { 488 argsize = ATA_SECT_SIZE * args[3]; 489 argbuf = kmalloc(argsize, GFP_KERNEL); 490 if (argbuf == NULL) { 491 rc = -ENOMEM; 492 goto error; 493 } 494 495 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 496 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 497 block count in sector count field */ 498 data_dir = DMA_FROM_DEVICE; 499 } else { 500 scsi_cmd[1] = (3 << 1); /* Non-data */ 501 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 502 data_dir = DMA_NONE; 503 } 504 505 scsi_cmd[0] = ATA_16; 506 507 scsi_cmd[4] = args[2]; 508 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 509 scsi_cmd[6] = args[3]; 510 scsi_cmd[8] = args[1]; 511 scsi_cmd[10] = 0x4f; 512 scsi_cmd[12] = 0xc2; 513 } else { 514 scsi_cmd[6] = args[1]; 515 } 516 scsi_cmd[14] = args[0]; 517 518 /* Good values for timeout and retries? Values below 519 from scsi_ioctl_send_command() for default case... */ 520 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 521 sensebuf, (10*HZ), 5, 0, NULL); 522 523 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 524 u8 *desc = sensebuf + 8; 525 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 526 527 /* If we set cc then ATA pass-through will cause a 528 * check condition even if no error. Filter that. */ 529 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 530 struct scsi_sense_hdr sshdr; 531 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 532 &sshdr); 533 if (sshdr.sense_key == 0 && 534 sshdr.asc == 0 && sshdr.ascq == 0) 535 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 536 } 537 538 /* Send userspace a few ATA registers (same as drivers/ide) */ 539 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 540 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 541 args[0] = desc[13]; /* status */ 542 args[1] = desc[3]; /* error */ 543 args[2] = desc[5]; /* sector count (0:7) */ 544 if (copy_to_user(arg, args, sizeof(args))) 545 rc = -EFAULT; 546 } 547 } 548 549 550 if (cmd_result) { 551 rc = -EIO; 552 goto error; 553 } 554 555 if ((argbuf) 556 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 557 rc = -EFAULT; 558 error: 559 kfree(sensebuf); 560 kfree(argbuf); 561 return rc; 562 } 563 564 /** 565 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 566 * @scsidev: Device to which we are issuing command 567 * @arg: User provided data for issuing command 568 * 569 * LOCKING: 570 * Defined by the SCSI layer. We don't really care. 571 * 572 * RETURNS: 573 * Zero on success, negative errno on error. 574 */ 575 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 576 { 577 int rc = 0; 578 u8 scsi_cmd[MAX_COMMAND_SIZE]; 579 u8 args[7], *sensebuf = NULL; 580 int cmd_result; 581 582 if (arg == NULL) 583 return -EINVAL; 584 585 if (copy_from_user(args, arg, sizeof(args))) 586 return -EFAULT; 587 588 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 589 if (!sensebuf) 590 return -ENOMEM; 591 592 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 593 scsi_cmd[0] = ATA_16; 594 scsi_cmd[1] = (3 << 1); /* Non-data */ 595 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 596 scsi_cmd[4] = args[1]; 597 scsi_cmd[6] = args[2]; 598 scsi_cmd[8] = args[3]; 599 scsi_cmd[10] = args[4]; 600 scsi_cmd[12] = args[5]; 601 scsi_cmd[13] = args[6] & 0x4f; 602 scsi_cmd[14] = args[0]; 603 604 /* Good values for timeout and retries? Values below 605 from scsi_ioctl_send_command() for default case... */ 606 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 607 sensebuf, (10*HZ), 5, 0, NULL); 608 609 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 610 u8 *desc = sensebuf + 8; 611 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 612 613 /* If we set cc then ATA pass-through will cause a 614 * check condition even if no error. Filter that. */ 615 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 616 struct scsi_sense_hdr sshdr; 617 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 618 &sshdr); 619 if (sshdr.sense_key == 0 && 620 sshdr.asc == 0 && sshdr.ascq == 0) 621 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 622 } 623 624 /* Send userspace ATA registers */ 625 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 626 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 627 args[0] = desc[13]; /* status */ 628 args[1] = desc[3]; /* error */ 629 args[2] = desc[5]; /* sector count (0:7) */ 630 args[3] = desc[7]; /* lbal */ 631 args[4] = desc[9]; /* lbam */ 632 args[5] = desc[11]; /* lbah */ 633 args[6] = desc[12]; /* select */ 634 if (copy_to_user(arg, args, sizeof(args))) 635 rc = -EFAULT; 636 } 637 } 638 639 if (cmd_result) { 640 rc = -EIO; 641 goto error; 642 } 643 644 error: 645 kfree(sensebuf); 646 return rc; 647 } 648 649 static int ata_ioc32(struct ata_port *ap) 650 { 651 if (ap->flags & ATA_FLAG_PIO_DMA) 652 return 1; 653 if (ap->pflags & ATA_PFLAG_PIO32) 654 return 1; 655 return 0; 656 } 657 658 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 659 int cmd, void __user *arg) 660 { 661 int val = -EINVAL, rc = -EINVAL; 662 unsigned long flags; 663 664 switch (cmd) { 665 case ATA_IOC_GET_IO32: 666 spin_lock_irqsave(ap->lock, flags); 667 val = ata_ioc32(ap); 668 spin_unlock_irqrestore(ap->lock, flags); 669 if (copy_to_user(arg, &val, 1)) 670 return -EFAULT; 671 return 0; 672 673 case ATA_IOC_SET_IO32: 674 val = (unsigned long) arg; 675 rc = 0; 676 spin_lock_irqsave(ap->lock, flags); 677 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 678 if (val) 679 ap->pflags |= ATA_PFLAG_PIO32; 680 else 681 ap->pflags &= ~ATA_PFLAG_PIO32; 682 } else { 683 if (val != ata_ioc32(ap)) 684 rc = -EINVAL; 685 } 686 spin_unlock_irqrestore(ap->lock, flags); 687 return rc; 688 689 case HDIO_GET_IDENTITY: 690 return ata_get_identity(ap, scsidev, arg); 691 692 case HDIO_DRIVE_CMD: 693 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 694 return -EACCES; 695 return ata_cmd_ioctl(scsidev, arg); 696 697 case HDIO_DRIVE_TASK: 698 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 699 return -EACCES; 700 return ata_task_ioctl(scsidev, arg); 701 702 default: 703 rc = -ENOTTY; 704 break; 705 } 706 707 return rc; 708 } 709 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 710 711 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) 712 { 713 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 714 scsidev, cmd, arg); 715 } 716 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 717 718 /** 719 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 720 * @dev: ATA device to which the new command is attached 721 * @cmd: SCSI command that originated this ATA command 722 * @done: SCSI command completion function 723 * 724 * Obtain a reference to an unused ata_queued_cmd structure, 725 * which is the basic libata structure representing a single 726 * ATA command sent to the hardware. 727 * 728 * If a command was available, fill in the SCSI-specific 729 * portions of the structure with information on the 730 * current command. 731 * 732 * LOCKING: 733 * spin_lock_irqsave(host lock) 734 * 735 * RETURNS: 736 * Command allocated, or %NULL if none available. 737 */ 738 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 739 struct scsi_cmnd *cmd, 740 void (*done)(struct scsi_cmnd *)) 741 { 742 struct ata_queued_cmd *qc; 743 744 qc = ata_qc_new_init(dev); 745 if (qc) { 746 qc->scsicmd = cmd; 747 qc->scsidone = done; 748 749 qc->sg = scsi_sglist(cmd); 750 qc->n_elem = scsi_sg_count(cmd); 751 } else { 752 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 753 done(cmd); 754 } 755 756 return qc; 757 } 758 759 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 760 { 761 struct scsi_cmnd *scmd = qc->scsicmd; 762 763 qc->extrabytes = scmd->request->extra_len; 764 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 765 } 766 767 /** 768 * ata_dump_status - user friendly display of error info 769 * @id: id of the port in question 770 * @tf: ptr to filled out taskfile 771 * 772 * Decode and dump the ATA error/status registers for the user so 773 * that they have some idea what really happened at the non 774 * make-believe layer. 775 * 776 * LOCKING: 777 * inherited from caller 778 */ 779 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 780 { 781 u8 stat = tf->command, err = tf->feature; 782 783 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); 784 if (stat & ATA_BUSY) { 785 printk("Busy }\n"); /* Data is not valid in this case */ 786 } else { 787 if (stat & 0x40) printk("DriveReady "); 788 if (stat & 0x20) printk("DeviceFault "); 789 if (stat & 0x10) printk("SeekComplete "); 790 if (stat & 0x08) printk("DataRequest "); 791 if (stat & 0x04) printk("CorrectedError "); 792 if (stat & 0x02) printk("Index "); 793 if (stat & 0x01) printk("Error "); 794 printk("}\n"); 795 796 if (err) { 797 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); 798 if (err & 0x04) printk("DriveStatusError "); 799 if (err & 0x80) { 800 if (err & 0x04) printk("BadCRC "); 801 else printk("Sector "); 802 } 803 if (err & 0x40) printk("UncorrectableError "); 804 if (err & 0x10) printk("SectorIdNotFound "); 805 if (err & 0x02) printk("TrackZeroNotFound "); 806 if (err & 0x01) printk("AddrMarkNotFound "); 807 printk("}\n"); 808 } 809 } 810 } 811 812 /** 813 * ata_to_sense_error - convert ATA error to SCSI error 814 * @id: ATA device number 815 * @drv_stat: value contained in ATA status register 816 * @drv_err: value contained in ATA error register 817 * @sk: the sense key we'll fill out 818 * @asc: the additional sense code we'll fill out 819 * @ascq: the additional sense code qualifier we'll fill out 820 * @verbose: be verbose 821 * 822 * Converts an ATA error into a SCSI error. Fill out pointers to 823 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 824 * format sense blocks. 825 * 826 * LOCKING: 827 * spin_lock_irqsave(host lock) 828 */ 829 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 830 u8 *asc, u8 *ascq, int verbose) 831 { 832 int i; 833 834 /* Based on the 3ware driver translation table */ 835 static const unsigned char sense_table[][4] = { 836 /* BBD|ECC|ID|MAR */ 837 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command 838 /* BBD|ECC|ID */ 839 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command 840 /* ECC|MC|MARK */ 841 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error 842 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 843 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error 844 /* MC|ID|ABRT|TRK0|MARK */ 845 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready 846 /* MCR|MARK */ 847 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready 848 /* Bad address mark */ 849 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field 850 /* TRK0 */ 851 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error 852 /* Abort & !ICRC */ 853 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command 854 /* Media change request */ 855 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline 856 /* SRV */ 857 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found 858 /* Media change */ 859 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline 860 /* ECC */ 861 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error 862 /* BBD - block marked bad */ 863 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error 864 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 865 }; 866 static const unsigned char stat_table[][4] = { 867 /* Must be first because BUSY means no other bits valid */ 868 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now 869 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault 870 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now 871 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered 872 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 873 }; 874 875 /* 876 * Is this an error we can process/parse 877 */ 878 if (drv_stat & ATA_BUSY) { 879 drv_err = 0; /* Ignore the err bits, they're invalid */ 880 } 881 882 if (drv_err) { 883 /* Look for drv_err */ 884 for (i = 0; sense_table[i][0] != 0xFF; i++) { 885 /* Look for best matches first */ 886 if ((sense_table[i][0] & drv_err) == 887 sense_table[i][0]) { 888 *sk = sense_table[i][1]; 889 *asc = sense_table[i][2]; 890 *ascq = sense_table[i][3]; 891 goto translate_done; 892 } 893 } 894 /* No immediate match */ 895 if (verbose) 896 printk(KERN_WARNING "ata%u: no sense translation for " 897 "error 0x%02x\n", id, drv_err); 898 } 899 900 /* Fall back to interpreting status bits */ 901 for (i = 0; stat_table[i][0] != 0xFF; i++) { 902 if (stat_table[i][0] & drv_stat) { 903 *sk = stat_table[i][1]; 904 *asc = stat_table[i][2]; 905 *ascq = stat_table[i][3]; 906 goto translate_done; 907 } 908 } 909 /* No error? Undecoded? */ 910 if (verbose) 911 printk(KERN_WARNING "ata%u: no sense translation for " 912 "status: 0x%02x\n", id, drv_stat); 913 914 /* We need a sensible error return here, which is tricky, and one 915 that won't cause people to do things like return a disk wrongly */ 916 *sk = ABORTED_COMMAND; 917 *asc = 0x00; 918 *ascq = 0x00; 919 920 translate_done: 921 if (verbose) 922 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " 923 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 924 id, drv_stat, drv_err, *sk, *asc, *ascq); 925 return; 926 } 927 928 /* 929 * ata_gen_passthru_sense - Generate check condition sense block. 930 * @qc: Command that completed. 931 * 932 * This function is specific to the ATA descriptor format sense 933 * block specified for the ATA pass through commands. Regardless 934 * of whether the command errored or not, return a sense 935 * block. Copy all controller registers into the sense 936 * block. Clear sense key, ASC & ASCQ if there is no error. 937 * 938 * LOCKING: 939 * None. 940 */ 941 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 942 { 943 struct scsi_cmnd *cmd = qc->scsicmd; 944 struct ata_taskfile *tf = &qc->result_tf; 945 unsigned char *sb = cmd->sense_buffer; 946 unsigned char *desc = sb + 8; 947 int verbose = qc->ap->ops->error_handler == NULL; 948 949 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 950 951 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 952 953 /* 954 * Use ata_to_sense_error() to map status register bits 955 * onto sense key, asc & ascq. 956 */ 957 if (qc->err_mask || 958 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 959 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 960 &sb[1], &sb[2], &sb[3], verbose); 961 sb[1] &= 0x0f; 962 } 963 964 /* 965 * Sense data is current and format is descriptor. 966 */ 967 sb[0] = 0x72; 968 969 desc[0] = 0x09; 970 971 /* set length of additional sense data */ 972 sb[7] = 14; 973 desc[1] = 12; 974 975 /* 976 * Copy registers into sense buffer. 977 */ 978 desc[2] = 0x00; 979 desc[3] = tf->feature; /* == error reg */ 980 desc[5] = tf->nsect; 981 desc[7] = tf->lbal; 982 desc[9] = tf->lbam; 983 desc[11] = tf->lbah; 984 desc[12] = tf->device; 985 desc[13] = tf->command; /* == status reg */ 986 987 /* 988 * Fill in Extend bit, and the high order bytes 989 * if applicable. 990 */ 991 if (tf->flags & ATA_TFLAG_LBA48) { 992 desc[2] |= 0x01; 993 desc[4] = tf->hob_nsect; 994 desc[6] = tf->hob_lbal; 995 desc[8] = tf->hob_lbam; 996 desc[10] = tf->hob_lbah; 997 } 998 } 999 1000 /** 1001 * ata_gen_ata_sense - generate a SCSI fixed sense block 1002 * @qc: Command that we are erroring out 1003 * 1004 * Generate sense block for a failed ATA command @qc. Descriptor 1005 * format is used to accomodate LBA48 block address. 1006 * 1007 * LOCKING: 1008 * None. 1009 */ 1010 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 1011 { 1012 struct ata_device *dev = qc->dev; 1013 struct scsi_cmnd *cmd = qc->scsicmd; 1014 struct ata_taskfile *tf = &qc->result_tf; 1015 unsigned char *sb = cmd->sense_buffer; 1016 unsigned char *desc = sb + 8; 1017 int verbose = qc->ap->ops->error_handler == NULL; 1018 u64 block; 1019 1020 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1021 1022 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1023 1024 /* sense data is current and format is descriptor */ 1025 sb[0] = 0x72; 1026 1027 /* Use ata_to_sense_error() to map status register bits 1028 * onto sense key, asc & ascq. 1029 */ 1030 if (qc->err_mask || 1031 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1032 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1033 &sb[1], &sb[2], &sb[3], verbose); 1034 sb[1] &= 0x0f; 1035 } 1036 1037 block = ata_tf_read_block(&qc->result_tf, dev); 1038 1039 /* information sense data descriptor */ 1040 sb[7] = 12; 1041 desc[0] = 0x00; 1042 desc[1] = 10; 1043 1044 desc[2] |= 0x80; /* valid */ 1045 desc[6] = block >> 40; 1046 desc[7] = block >> 32; 1047 desc[8] = block >> 24; 1048 desc[9] = block >> 16; 1049 desc[10] = block >> 8; 1050 desc[11] = block; 1051 } 1052 1053 static void ata_scsi_sdev_config(struct scsi_device *sdev) 1054 { 1055 sdev->use_10_for_rw = 1; 1056 sdev->use_10_for_ms = 1; 1057 1058 /* Schedule policy is determined by ->qc_defer() callback and 1059 * it needs to see every deferred qc. Set dev_blocked to 1 to 1060 * prevent SCSI midlayer from automatically deferring 1061 * requests. 1062 */ 1063 sdev->max_device_blocked = 1; 1064 } 1065 1066 /** 1067 * atapi_drain_needed - Check whether data transfer may overflow 1068 * @rq: request to be checked 1069 * 1070 * ATAPI commands which transfer variable length data to host 1071 * might overflow due to application error or hardare bug. This 1072 * function checks whether overflow should be drained and ignored 1073 * for @request. 1074 * 1075 * LOCKING: 1076 * None. 1077 * 1078 * RETURNS: 1079 * 1 if ; otherwise, 0. 1080 */ 1081 static int atapi_drain_needed(struct request *rq) 1082 { 1083 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC)) 1084 return 0; 1085 1086 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE)) 1087 return 0; 1088 1089 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; 1090 } 1091 1092 static int ata_scsi_dev_config(struct scsi_device *sdev, 1093 struct ata_device *dev) 1094 { 1095 if (!ata_id_has_unload(dev->id)) 1096 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1097 1098 /* configure max sectors */ 1099 blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors); 1100 1101 if (dev->class == ATA_DEV_ATAPI) { 1102 struct request_queue *q = sdev->request_queue; 1103 void *buf; 1104 1105 /* set the min alignment and padding */ 1106 blk_queue_update_dma_alignment(sdev->request_queue, 1107 ATA_DMA_PAD_SZ - 1); 1108 blk_queue_update_dma_pad(sdev->request_queue, 1109 ATA_DMA_PAD_SZ - 1); 1110 1111 /* configure draining */ 1112 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1113 if (!buf) { 1114 ata_dev_printk(dev, KERN_ERR, 1115 "drain buffer allocation failed\n"); 1116 return -ENOMEM; 1117 } 1118 1119 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1120 } else { 1121 /* ATA devices must be sector aligned */ 1122 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1123 blk_queue_update_dma_alignment(sdev->request_queue, 1124 sdev->sector_size - 1); 1125 sdev->manage_start_stop = 1; 1126 } 1127 1128 if (dev->flags & ATA_DFLAG_AN) 1129 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1130 1131 if (dev->flags & ATA_DFLAG_NCQ) { 1132 int depth; 1133 1134 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1135 depth = min(ATA_MAX_QUEUE - 1, depth); 1136 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); 1137 } 1138 1139 dev->sdev = sdev; 1140 return 0; 1141 } 1142 1143 /** 1144 * ata_scsi_slave_config - Set SCSI device attributes 1145 * @sdev: SCSI device to examine 1146 * 1147 * This is called before we actually start reading 1148 * and writing to the device, to configure certain 1149 * SCSI mid-layer behaviors. 1150 * 1151 * LOCKING: 1152 * Defined by SCSI layer. We don't really care. 1153 */ 1154 1155 int ata_scsi_slave_config(struct scsi_device *sdev) 1156 { 1157 struct ata_port *ap = ata_shost_to_port(sdev->host); 1158 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1159 int rc = 0; 1160 1161 ata_scsi_sdev_config(sdev); 1162 1163 if (dev) 1164 rc = ata_scsi_dev_config(sdev, dev); 1165 1166 return rc; 1167 } 1168 1169 /** 1170 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1171 * @sdev: SCSI device to be destroyed 1172 * 1173 * @sdev is about to be destroyed for hot/warm unplugging. If 1174 * this unplugging was initiated by libata as indicated by NULL 1175 * dev->sdev, this function doesn't have to do anything. 1176 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1177 * Clear dev->sdev, schedule the device for ATA detach and invoke 1178 * EH. 1179 * 1180 * LOCKING: 1181 * Defined by SCSI layer. We don't really care. 1182 */ 1183 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1184 { 1185 struct ata_port *ap = ata_shost_to_port(sdev->host); 1186 struct request_queue *q = sdev->request_queue; 1187 unsigned long flags; 1188 struct ata_device *dev; 1189 1190 if (!ap->ops->error_handler) 1191 return; 1192 1193 spin_lock_irqsave(ap->lock, flags); 1194 dev = __ata_scsi_find_dev(ap, sdev); 1195 if (dev && dev->sdev) { 1196 /* SCSI device already in CANCEL state, no need to offline it */ 1197 dev->sdev = NULL; 1198 dev->flags |= ATA_DFLAG_DETACH; 1199 ata_port_schedule_eh(ap); 1200 } 1201 spin_unlock_irqrestore(ap->lock, flags); 1202 1203 kfree(q->dma_drain_buffer); 1204 q->dma_drain_buffer = NULL; 1205 q->dma_drain_size = 0; 1206 } 1207 1208 /** 1209 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1210 * @sdev: SCSI device to configure queue depth for 1211 * @queue_depth: new queue depth 1212 * @reason: calling context 1213 * 1214 * This is libata standard hostt->change_queue_depth callback. 1215 * SCSI will call into this callback when user tries to set queue 1216 * depth via sysfs. 1217 * 1218 * LOCKING: 1219 * SCSI layer (we don't care) 1220 * 1221 * RETURNS: 1222 * Newly configured queue depth. 1223 */ 1224 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth, 1225 int reason) 1226 { 1227 struct ata_port *ap = ata_shost_to_port(sdev->host); 1228 struct ata_device *dev; 1229 unsigned long flags; 1230 1231 if (reason != SCSI_QDEPTH_DEFAULT) 1232 return -EOPNOTSUPP; 1233 1234 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1235 return sdev->queue_depth; 1236 1237 dev = ata_scsi_find_dev(ap, sdev); 1238 if (!dev || !ata_dev_enabled(dev)) 1239 return sdev->queue_depth; 1240 1241 /* NCQ enabled? */ 1242 spin_lock_irqsave(ap->lock, flags); 1243 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1244 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1245 dev->flags |= ATA_DFLAG_NCQ_OFF; 1246 queue_depth = 1; 1247 } 1248 spin_unlock_irqrestore(ap->lock, flags); 1249 1250 /* limit and apply queue depth */ 1251 queue_depth = min(queue_depth, sdev->host->can_queue); 1252 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1253 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); 1254 1255 if (sdev->queue_depth == queue_depth) 1256 return -EINVAL; 1257 1258 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); 1259 return queue_depth; 1260 } 1261 1262 /** 1263 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1264 * @qc: Storage for translated ATA taskfile 1265 * 1266 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1267 * (to start). Perhaps these commands should be preceded by 1268 * CHECK POWER MODE to see what power mode the device is already in. 1269 * [See SAT revision 5 at www.t10.org] 1270 * 1271 * LOCKING: 1272 * spin_lock_irqsave(host lock) 1273 * 1274 * RETURNS: 1275 * Zero on success, non-zero on error. 1276 */ 1277 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1278 { 1279 struct scsi_cmnd *scmd = qc->scsicmd; 1280 struct ata_taskfile *tf = &qc->tf; 1281 const u8 *cdb = scmd->cmnd; 1282 1283 if (scmd->cmd_len < 5) 1284 goto invalid_fld; 1285 1286 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1287 tf->protocol = ATA_PROT_NODATA; 1288 if (cdb[1] & 0x1) { 1289 ; /* ignore IMMED bit, violates sat-r05 */ 1290 } 1291 if (cdb[4] & 0x2) 1292 goto invalid_fld; /* LOEJ bit set not supported */ 1293 if (((cdb[4] >> 4) & 0xf) != 0) 1294 goto invalid_fld; /* power conditions not supported */ 1295 1296 if (cdb[4] & 0x1) { 1297 tf->nsect = 1; /* 1 sector, lba=0 */ 1298 1299 if (qc->dev->flags & ATA_DFLAG_LBA) { 1300 tf->flags |= ATA_TFLAG_LBA; 1301 1302 tf->lbah = 0x0; 1303 tf->lbam = 0x0; 1304 tf->lbal = 0x0; 1305 tf->device |= ATA_LBA; 1306 } else { 1307 /* CHS */ 1308 tf->lbal = 0x1; /* sect */ 1309 tf->lbam = 0x0; /* cyl low */ 1310 tf->lbah = 0x0; /* cyl high */ 1311 } 1312 1313 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1314 } else { 1315 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1316 * or S5) causing some drives to spin up and down again. 1317 */ 1318 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1319 system_state == SYSTEM_POWER_OFF) 1320 goto skip; 1321 1322 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1323 system_entering_hibernation()) 1324 goto skip; 1325 1326 /* Issue ATA STANDBY IMMEDIATE command */ 1327 tf->command = ATA_CMD_STANDBYNOW1; 1328 } 1329 1330 /* 1331 * Standby and Idle condition timers could be implemented but that 1332 * would require libata to implement the Power condition mode page 1333 * and allow the user to change it. Changing mode pages requires 1334 * MODE SELECT to be implemented. 1335 */ 1336 1337 return 0; 1338 1339 invalid_fld: 1340 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1341 /* "Invalid field in cbd" */ 1342 return 1; 1343 skip: 1344 scmd->result = SAM_STAT_GOOD; 1345 return 1; 1346 } 1347 1348 1349 /** 1350 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1351 * @qc: Storage for translated ATA taskfile 1352 * 1353 * Sets up an ATA taskfile to issue FLUSH CACHE or 1354 * FLUSH CACHE EXT. 1355 * 1356 * LOCKING: 1357 * spin_lock_irqsave(host lock) 1358 * 1359 * RETURNS: 1360 * Zero on success, non-zero on error. 1361 */ 1362 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1363 { 1364 struct ata_taskfile *tf = &qc->tf; 1365 1366 tf->flags |= ATA_TFLAG_DEVICE; 1367 tf->protocol = ATA_PROT_NODATA; 1368 1369 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1370 tf->command = ATA_CMD_FLUSH_EXT; 1371 else 1372 tf->command = ATA_CMD_FLUSH; 1373 1374 /* flush is critical for IO integrity, consider it an IO command */ 1375 qc->flags |= ATA_QCFLAG_IO; 1376 1377 return 0; 1378 } 1379 1380 /** 1381 * scsi_6_lba_len - Get LBA and transfer length 1382 * @cdb: SCSI command to translate 1383 * 1384 * Calculate LBA and transfer length for 6-byte commands. 1385 * 1386 * RETURNS: 1387 * @plba: the LBA 1388 * @plen: the transfer length 1389 */ 1390 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1391 { 1392 u64 lba = 0; 1393 u32 len; 1394 1395 VPRINTK("six-byte command\n"); 1396 1397 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1398 lba |= ((u64)cdb[2]) << 8; 1399 lba |= ((u64)cdb[3]); 1400 1401 len = cdb[4]; 1402 1403 *plba = lba; 1404 *plen = len; 1405 } 1406 1407 /** 1408 * scsi_10_lba_len - Get LBA and transfer length 1409 * @cdb: SCSI command to translate 1410 * 1411 * Calculate LBA and transfer length for 10-byte commands. 1412 * 1413 * RETURNS: 1414 * @plba: the LBA 1415 * @plen: the transfer length 1416 */ 1417 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1418 { 1419 u64 lba = 0; 1420 u32 len = 0; 1421 1422 VPRINTK("ten-byte command\n"); 1423 1424 lba |= ((u64)cdb[2]) << 24; 1425 lba |= ((u64)cdb[3]) << 16; 1426 lba |= ((u64)cdb[4]) << 8; 1427 lba |= ((u64)cdb[5]); 1428 1429 len |= ((u32)cdb[7]) << 8; 1430 len |= ((u32)cdb[8]); 1431 1432 *plba = lba; 1433 *plen = len; 1434 } 1435 1436 /** 1437 * scsi_16_lba_len - Get LBA and transfer length 1438 * @cdb: SCSI command to translate 1439 * 1440 * Calculate LBA and transfer length for 16-byte commands. 1441 * 1442 * RETURNS: 1443 * @plba: the LBA 1444 * @plen: the transfer length 1445 */ 1446 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1447 { 1448 u64 lba = 0; 1449 u32 len = 0; 1450 1451 VPRINTK("sixteen-byte command\n"); 1452 1453 lba |= ((u64)cdb[2]) << 56; 1454 lba |= ((u64)cdb[3]) << 48; 1455 lba |= ((u64)cdb[4]) << 40; 1456 lba |= ((u64)cdb[5]) << 32; 1457 lba |= ((u64)cdb[6]) << 24; 1458 lba |= ((u64)cdb[7]) << 16; 1459 lba |= ((u64)cdb[8]) << 8; 1460 lba |= ((u64)cdb[9]); 1461 1462 len |= ((u32)cdb[10]) << 24; 1463 len |= ((u32)cdb[11]) << 16; 1464 len |= ((u32)cdb[12]) << 8; 1465 len |= ((u32)cdb[13]); 1466 1467 *plba = lba; 1468 *plen = len; 1469 } 1470 1471 /** 1472 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1473 * @qc: Storage for translated ATA taskfile 1474 * 1475 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1476 * 1477 * LOCKING: 1478 * spin_lock_irqsave(host lock) 1479 * 1480 * RETURNS: 1481 * Zero on success, non-zero on error. 1482 */ 1483 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1484 { 1485 struct scsi_cmnd *scmd = qc->scsicmd; 1486 struct ata_taskfile *tf = &qc->tf; 1487 struct ata_device *dev = qc->dev; 1488 u64 dev_sectors = qc->dev->n_sectors; 1489 const u8 *cdb = scmd->cmnd; 1490 u64 block; 1491 u32 n_block; 1492 1493 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1494 tf->protocol = ATA_PROT_NODATA; 1495 1496 if (cdb[0] == VERIFY) { 1497 if (scmd->cmd_len < 10) 1498 goto invalid_fld; 1499 scsi_10_lba_len(cdb, &block, &n_block); 1500 } else if (cdb[0] == VERIFY_16) { 1501 if (scmd->cmd_len < 16) 1502 goto invalid_fld; 1503 scsi_16_lba_len(cdb, &block, &n_block); 1504 } else 1505 goto invalid_fld; 1506 1507 if (!n_block) 1508 goto nothing_to_do; 1509 if (block >= dev_sectors) 1510 goto out_of_range; 1511 if ((block + n_block) > dev_sectors) 1512 goto out_of_range; 1513 1514 if (dev->flags & ATA_DFLAG_LBA) { 1515 tf->flags |= ATA_TFLAG_LBA; 1516 1517 if (lba_28_ok(block, n_block)) { 1518 /* use LBA28 */ 1519 tf->command = ATA_CMD_VERIFY; 1520 tf->device |= (block >> 24) & 0xf; 1521 } else if (lba_48_ok(block, n_block)) { 1522 if (!(dev->flags & ATA_DFLAG_LBA48)) 1523 goto out_of_range; 1524 1525 /* use LBA48 */ 1526 tf->flags |= ATA_TFLAG_LBA48; 1527 tf->command = ATA_CMD_VERIFY_EXT; 1528 1529 tf->hob_nsect = (n_block >> 8) & 0xff; 1530 1531 tf->hob_lbah = (block >> 40) & 0xff; 1532 tf->hob_lbam = (block >> 32) & 0xff; 1533 tf->hob_lbal = (block >> 24) & 0xff; 1534 } else 1535 /* request too large even for LBA48 */ 1536 goto out_of_range; 1537 1538 tf->nsect = n_block & 0xff; 1539 1540 tf->lbah = (block >> 16) & 0xff; 1541 tf->lbam = (block >> 8) & 0xff; 1542 tf->lbal = block & 0xff; 1543 1544 tf->device |= ATA_LBA; 1545 } else { 1546 /* CHS */ 1547 u32 sect, head, cyl, track; 1548 1549 if (!lba_28_ok(block, n_block)) 1550 goto out_of_range; 1551 1552 /* Convert LBA to CHS */ 1553 track = (u32)block / dev->sectors; 1554 cyl = track / dev->heads; 1555 head = track % dev->heads; 1556 sect = (u32)block % dev->sectors + 1; 1557 1558 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1559 (u32)block, track, cyl, head, sect); 1560 1561 /* Check whether the converted CHS can fit. 1562 Cylinder: 0-65535 1563 Head: 0-15 1564 Sector: 1-255*/ 1565 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1566 goto out_of_range; 1567 1568 tf->command = ATA_CMD_VERIFY; 1569 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1570 tf->lbal = sect; 1571 tf->lbam = cyl; 1572 tf->lbah = cyl >> 8; 1573 tf->device |= head; 1574 } 1575 1576 return 0; 1577 1578 invalid_fld: 1579 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1580 /* "Invalid field in cbd" */ 1581 return 1; 1582 1583 out_of_range: 1584 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1585 /* "Logical Block Address out of range" */ 1586 return 1; 1587 1588 nothing_to_do: 1589 scmd->result = SAM_STAT_GOOD; 1590 return 1; 1591 } 1592 1593 /** 1594 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1595 * @qc: Storage for translated ATA taskfile 1596 * 1597 * Converts any of six SCSI read/write commands into the 1598 * ATA counterpart, including starting sector (LBA), 1599 * sector count, and taking into account the device's LBA48 1600 * support. 1601 * 1602 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1603 * %WRITE_16 are currently supported. 1604 * 1605 * LOCKING: 1606 * spin_lock_irqsave(host lock) 1607 * 1608 * RETURNS: 1609 * Zero on success, non-zero on error. 1610 */ 1611 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1612 { 1613 struct scsi_cmnd *scmd = qc->scsicmd; 1614 const u8 *cdb = scmd->cmnd; 1615 unsigned int tf_flags = 0; 1616 u64 block; 1617 u32 n_block; 1618 int rc; 1619 1620 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1621 tf_flags |= ATA_TFLAG_WRITE; 1622 1623 /* Calculate the SCSI LBA, transfer length and FUA. */ 1624 switch (cdb[0]) { 1625 case READ_10: 1626 case WRITE_10: 1627 if (unlikely(scmd->cmd_len < 10)) 1628 goto invalid_fld; 1629 scsi_10_lba_len(cdb, &block, &n_block); 1630 if (unlikely(cdb[1] & (1 << 3))) 1631 tf_flags |= ATA_TFLAG_FUA; 1632 break; 1633 case READ_6: 1634 case WRITE_6: 1635 if (unlikely(scmd->cmd_len < 6)) 1636 goto invalid_fld; 1637 scsi_6_lba_len(cdb, &block, &n_block); 1638 1639 /* for 6-byte r/w commands, transfer length 0 1640 * means 256 blocks of data, not 0 block. 1641 */ 1642 if (!n_block) 1643 n_block = 256; 1644 break; 1645 case READ_16: 1646 case WRITE_16: 1647 if (unlikely(scmd->cmd_len < 16)) 1648 goto invalid_fld; 1649 scsi_16_lba_len(cdb, &block, &n_block); 1650 if (unlikely(cdb[1] & (1 << 3))) 1651 tf_flags |= ATA_TFLAG_FUA; 1652 break; 1653 default: 1654 DPRINTK("no-byte command\n"); 1655 goto invalid_fld; 1656 } 1657 1658 /* Check and compose ATA command */ 1659 if (!n_block) 1660 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1661 * length 0 means transfer 0 block of data. 1662 * However, for ATA R/W commands, sector count 0 means 1663 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1664 * 1665 * WARNING: one or two older ATA drives treat 0 as 0... 1666 */ 1667 goto nothing_to_do; 1668 1669 qc->flags |= ATA_QCFLAG_IO; 1670 qc->nbytes = n_block * scmd->device->sector_size; 1671 1672 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1673 qc->tag); 1674 if (likely(rc == 0)) 1675 return 0; 1676 1677 if (rc == -ERANGE) 1678 goto out_of_range; 1679 /* treat all other errors as -EINVAL, fall through */ 1680 invalid_fld: 1681 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1682 /* "Invalid field in cbd" */ 1683 return 1; 1684 1685 out_of_range: 1686 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1687 /* "Logical Block Address out of range" */ 1688 return 1; 1689 1690 nothing_to_do: 1691 scmd->result = SAM_STAT_GOOD; 1692 return 1; 1693 } 1694 1695 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1696 { 1697 struct ata_port *ap = qc->ap; 1698 struct scsi_cmnd *cmd = qc->scsicmd; 1699 u8 *cdb = cmd->cmnd; 1700 int need_sense = (qc->err_mask != 0); 1701 1702 /* For ATA pass thru (SAT) commands, generate a sense block if 1703 * user mandated it or if there's an error. Note that if we 1704 * generate because the user forced us to, a check condition 1705 * is generated and the ATA register values are returned 1706 * whether the command completed successfully or not. If there 1707 * was no error, SK, ASC and ASCQ will all be zero. 1708 */ 1709 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1710 ((cdb[2] & 0x20) || need_sense)) { 1711 ata_gen_passthru_sense(qc); 1712 } else { 1713 if (!need_sense) { 1714 cmd->result = SAM_STAT_GOOD; 1715 } else { 1716 /* TODO: decide which descriptor format to use 1717 * for 48b LBA devices and call that here 1718 * instead of the fixed desc, which is only 1719 * good for smaller LBA (and maybe CHS?) 1720 * devices. 1721 */ 1722 ata_gen_ata_sense(qc); 1723 } 1724 } 1725 1726 if (need_sense && !ap->ops->error_handler) 1727 ata_dump_status(ap->print_id, &qc->result_tf); 1728 1729 qc->scsidone(cmd); 1730 1731 ata_qc_free(qc); 1732 } 1733 1734 /** 1735 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1736 * @dev: ATA device to which the command is addressed 1737 * @cmd: SCSI command to execute 1738 * @done: SCSI command completion function 1739 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1740 * 1741 * Our ->queuecommand() function has decided that the SCSI 1742 * command issued can be directly translated into an ATA 1743 * command, rather than handled internally. 1744 * 1745 * This function sets up an ata_queued_cmd structure for the 1746 * SCSI command, and sends that ata_queued_cmd to the hardware. 1747 * 1748 * The xlat_func argument (actor) returns 0 if ready to execute 1749 * ATA command, else 1 to finish translation. If 1 is returned 1750 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1751 * to be set reflecting an error condition or clean (early) 1752 * termination. 1753 * 1754 * LOCKING: 1755 * spin_lock_irqsave(host lock) 1756 * 1757 * RETURNS: 1758 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1759 * needs to be deferred. 1760 */ 1761 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1762 void (*done)(struct scsi_cmnd *), 1763 ata_xlat_func_t xlat_func) 1764 { 1765 struct ata_port *ap = dev->link->ap; 1766 struct ata_queued_cmd *qc; 1767 int rc; 1768 1769 VPRINTK("ENTER\n"); 1770 1771 qc = ata_scsi_qc_new(dev, cmd, done); 1772 if (!qc) 1773 goto err_mem; 1774 1775 /* data is present; dma-map it */ 1776 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1777 cmd->sc_data_direction == DMA_TO_DEVICE) { 1778 if (unlikely(scsi_bufflen(cmd) < 1)) { 1779 ata_dev_printk(dev, KERN_WARNING, 1780 "WARNING: zero len r/w req\n"); 1781 goto err_did; 1782 } 1783 1784 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1785 1786 qc->dma_dir = cmd->sc_data_direction; 1787 } 1788 1789 qc->complete_fn = ata_scsi_qc_complete; 1790 1791 if (xlat_func(qc)) 1792 goto early_finish; 1793 1794 if (ap->ops->qc_defer) { 1795 if ((rc = ap->ops->qc_defer(qc))) 1796 goto defer; 1797 } 1798 1799 /* select device, send command to hardware */ 1800 ata_qc_issue(qc); 1801 1802 VPRINTK("EXIT\n"); 1803 return 0; 1804 1805 early_finish: 1806 ata_qc_free(qc); 1807 qc->scsidone(cmd); 1808 DPRINTK("EXIT - early finish (good or error)\n"); 1809 return 0; 1810 1811 err_did: 1812 ata_qc_free(qc); 1813 cmd->result = (DID_ERROR << 16); 1814 qc->scsidone(cmd); 1815 err_mem: 1816 DPRINTK("EXIT - internal\n"); 1817 return 0; 1818 1819 defer: 1820 ata_qc_free(qc); 1821 DPRINTK("EXIT - defer\n"); 1822 if (rc == ATA_DEFER_LINK) 1823 return SCSI_MLQUEUE_DEVICE_BUSY; 1824 else 1825 return SCSI_MLQUEUE_HOST_BUSY; 1826 } 1827 1828 /** 1829 * ata_scsi_rbuf_get - Map response buffer. 1830 * @cmd: SCSI command containing buffer to be mapped. 1831 * @flags: unsigned long variable to store irq enable status 1832 * @copy_in: copy in from user buffer 1833 * 1834 * Prepare buffer for simulated SCSI commands. 1835 * 1836 * LOCKING: 1837 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 1838 * 1839 * RETURNS: 1840 * Pointer to response buffer. 1841 */ 1842 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 1843 unsigned long *flags) 1844 { 1845 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 1846 1847 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1848 if (copy_in) 1849 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1850 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1851 return ata_scsi_rbuf; 1852 } 1853 1854 /** 1855 * ata_scsi_rbuf_put - Unmap response buffer. 1856 * @cmd: SCSI command containing buffer to be unmapped. 1857 * @copy_out: copy out result 1858 * @flags: @flags passed to ata_scsi_rbuf_get() 1859 * 1860 * Returns rbuf buffer. The result is copied to @cmd's buffer if 1861 * @copy_back is true. 1862 * 1863 * LOCKING: 1864 * Unlocks ata_scsi_rbuf_lock. 1865 */ 1866 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 1867 unsigned long *flags) 1868 { 1869 if (copy_out) 1870 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1871 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1872 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 1873 } 1874 1875 /** 1876 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1877 * @args: device IDENTIFY data / SCSI command of interest. 1878 * @actor: Callback hook for desired SCSI command simulator 1879 * 1880 * Takes care of the hard work of simulating a SCSI command... 1881 * Mapping the response buffer, calling the command's handler, 1882 * and handling the handler's return value. This return value 1883 * indicates whether the handler wishes the SCSI command to be 1884 * completed successfully (0), or not (in which case cmd->result 1885 * and sense buffer are assumed to be set). 1886 * 1887 * LOCKING: 1888 * spin_lock_irqsave(host lock) 1889 */ 1890 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1891 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1892 { 1893 u8 *rbuf; 1894 unsigned int rc; 1895 struct scsi_cmnd *cmd = args->cmd; 1896 unsigned long flags; 1897 1898 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 1899 rc = actor(args, rbuf); 1900 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 1901 1902 if (rc == 0) 1903 cmd->result = SAM_STAT_GOOD; 1904 args->done(cmd); 1905 } 1906 1907 /** 1908 * ata_scsiop_inq_std - Simulate INQUIRY command 1909 * @args: device IDENTIFY data / SCSI command of interest. 1910 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1911 * 1912 * Returns standard device identification data associated 1913 * with non-VPD INQUIRY command output. 1914 * 1915 * LOCKING: 1916 * spin_lock_irqsave(host lock) 1917 */ 1918 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1919 { 1920 const u8 versions[] = { 1921 0x60, /* SAM-3 (no version claimed) */ 1922 1923 0x03, 1924 0x20, /* SBC-2 (no version claimed) */ 1925 1926 0x02, 1927 0x60 /* SPC-3 (no version claimed) */ 1928 }; 1929 u8 hdr[] = { 1930 TYPE_DISK, 1931 0, 1932 0x5, /* claim SPC-3 version compatibility */ 1933 2, 1934 95 - 4 1935 }; 1936 1937 VPRINTK("ENTER\n"); 1938 1939 /* set scsi removeable (RMB) bit per ata bit */ 1940 if (ata_id_removeable(args->id)) 1941 hdr[1] |= (1 << 7); 1942 1943 memcpy(rbuf, hdr, sizeof(hdr)); 1944 memcpy(&rbuf[8], "ATA ", 8); 1945 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1946 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1947 1948 if (rbuf[32] == 0 || rbuf[32] == ' ') 1949 memcpy(&rbuf[32], "n/a ", 4); 1950 1951 memcpy(rbuf + 59, versions, sizeof(versions)); 1952 1953 return 0; 1954 } 1955 1956 /** 1957 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1958 * @args: device IDENTIFY data / SCSI command of interest. 1959 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1960 * 1961 * Returns list of inquiry VPD pages available. 1962 * 1963 * LOCKING: 1964 * spin_lock_irqsave(host lock) 1965 */ 1966 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1967 { 1968 const u8 pages[] = { 1969 0x00, /* page 0x00, this page */ 1970 0x80, /* page 0x80, unit serial no page */ 1971 0x83, /* page 0x83, device ident page */ 1972 0x89, /* page 0x89, ata info page */ 1973 0xb0, /* page 0xb0, block limits page */ 1974 0xb1, /* page 0xb1, block device characteristics page */ 1975 0xb2, /* page 0xb2, thin provisioning page */ 1976 }; 1977 1978 rbuf[3] = sizeof(pages); /* number of supported VPD pages */ 1979 memcpy(rbuf + 4, pages, sizeof(pages)); 1980 return 0; 1981 } 1982 1983 /** 1984 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1985 * @args: device IDENTIFY data / SCSI command of interest. 1986 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1987 * 1988 * Returns ATA device serial number. 1989 * 1990 * LOCKING: 1991 * spin_lock_irqsave(host lock) 1992 */ 1993 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 1994 { 1995 const u8 hdr[] = { 1996 0, 1997 0x80, /* this page code */ 1998 0, 1999 ATA_ID_SERNO_LEN, /* page len */ 2000 }; 2001 2002 memcpy(rbuf, hdr, sizeof(hdr)); 2003 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2004 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2005 return 0; 2006 } 2007 2008 /** 2009 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2010 * @args: device IDENTIFY data / SCSI command of interest. 2011 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2012 * 2013 * Yields two logical unit device identification designators: 2014 * - vendor specific ASCII containing the ATA serial number 2015 * - SAT defined "t10 vendor id based" containing ASCII vendor 2016 * name ("ATA "), model and serial numbers. 2017 * 2018 * LOCKING: 2019 * spin_lock_irqsave(host lock) 2020 */ 2021 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2022 { 2023 const int sat_model_serial_desc_len = 68; 2024 int num; 2025 2026 rbuf[1] = 0x83; /* this page code */ 2027 num = 4; 2028 2029 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2030 rbuf[num + 0] = 2; 2031 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2032 num += 4; 2033 ata_id_string(args->id, (unsigned char *) rbuf + num, 2034 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2035 num += ATA_ID_SERNO_LEN; 2036 2037 /* SAT defined lu model and serial numbers descriptor */ 2038 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2039 rbuf[num + 0] = 2; 2040 rbuf[num + 1] = 1; 2041 rbuf[num + 3] = sat_model_serial_desc_len; 2042 num += 4; 2043 memcpy(rbuf + num, "ATA ", 8); 2044 num += 8; 2045 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2046 ATA_ID_PROD_LEN); 2047 num += ATA_ID_PROD_LEN; 2048 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2049 ATA_ID_SERNO_LEN); 2050 num += ATA_ID_SERNO_LEN; 2051 2052 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2053 return 0; 2054 } 2055 2056 /** 2057 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2058 * @args: device IDENTIFY data / SCSI command of interest. 2059 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2060 * 2061 * Yields SAT-specified ATA VPD page. 2062 * 2063 * LOCKING: 2064 * spin_lock_irqsave(host lock) 2065 */ 2066 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2067 { 2068 struct ata_taskfile tf; 2069 2070 memset(&tf, 0, sizeof(tf)); 2071 2072 rbuf[1] = 0x89; /* our page code */ 2073 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2074 rbuf[3] = (0x238 & 0xff); 2075 2076 memcpy(&rbuf[8], "linux ", 8); 2077 memcpy(&rbuf[16], "libata ", 16); 2078 memcpy(&rbuf[32], DRV_VERSION, 4); 2079 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2080 2081 /* we don't store the ATA device signature, so we fake it */ 2082 2083 tf.command = ATA_DRDY; /* really, this is Status reg */ 2084 tf.lbal = 0x1; 2085 tf.nsect = 0x1; 2086 2087 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2088 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2089 2090 rbuf[56] = ATA_CMD_ID_ATA; 2091 2092 memcpy(&rbuf[60], &args->id[0], 512); 2093 return 0; 2094 } 2095 2096 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2097 { 2098 u16 min_io_sectors; 2099 2100 rbuf[1] = 0xb0; 2101 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2102 2103 /* 2104 * Optimal transfer length granularity. 2105 * 2106 * This is always one physical block, but for disks with a smaller 2107 * logical than physical sector size we need to figure out what the 2108 * latter is. 2109 */ 2110 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2111 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2112 2113 /* 2114 * Optimal unmap granularity. 2115 * 2116 * The ATA spec doesn't even know about a granularity or alignment 2117 * for the TRIM command. We can leave away most of the unmap related 2118 * VPD page entries, but we have specifify a granularity to signal 2119 * that we support some form of unmap - in thise case via WRITE SAME 2120 * with the unmap bit set. 2121 */ 2122 if (ata_id_has_trim(args->id)) { 2123 put_unaligned_be32(65535 * 512 / 8, &rbuf[20]); 2124 put_unaligned_be32(1, &rbuf[28]); 2125 } 2126 2127 return 0; 2128 } 2129 2130 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2131 { 2132 int form_factor = ata_id_form_factor(args->id); 2133 int media_rotation_rate = ata_id_rotation_rate(args->id); 2134 2135 rbuf[1] = 0xb1; 2136 rbuf[3] = 0x3c; 2137 rbuf[4] = media_rotation_rate >> 8; 2138 rbuf[5] = media_rotation_rate; 2139 rbuf[7] = form_factor; 2140 2141 return 0; 2142 } 2143 2144 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2145 { 2146 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2147 rbuf[1] = 0xb2; 2148 rbuf[3] = 0x4; 2149 rbuf[5] = 1 << 6; /* TPWS */ 2150 2151 return 0; 2152 } 2153 2154 /** 2155 * ata_scsiop_noop - Command handler that simply returns success. 2156 * @args: device IDENTIFY data / SCSI command of interest. 2157 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2158 * 2159 * No operation. Simply returns success to caller, to indicate 2160 * that the caller should successfully complete this SCSI command. 2161 * 2162 * LOCKING: 2163 * spin_lock_irqsave(host lock) 2164 */ 2165 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) 2166 { 2167 VPRINTK("ENTER\n"); 2168 return 0; 2169 } 2170 2171 /** 2172 * ata_msense_caching - Simulate MODE SENSE caching info page 2173 * @id: device IDENTIFY data 2174 * @buf: output buffer 2175 * 2176 * Generate a caching info page, which conditionally indicates 2177 * write caching to the SCSI layer, depending on device 2178 * capabilities. 2179 * 2180 * LOCKING: 2181 * None. 2182 */ 2183 static unsigned int ata_msense_caching(u16 *id, u8 *buf) 2184 { 2185 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage)); 2186 if (ata_id_wcache_enabled(id)) 2187 buf[2] |= (1 << 2); /* write cache enable */ 2188 if (!ata_id_rahead_enabled(id)) 2189 buf[12] |= (1 << 5); /* disable read ahead */ 2190 return sizeof(def_cache_mpage); 2191 } 2192 2193 /** 2194 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page 2195 * @buf: output buffer 2196 * 2197 * Generate a generic MODE SENSE control mode page. 2198 * 2199 * LOCKING: 2200 * None. 2201 */ 2202 static unsigned int ata_msense_ctl_mode(u8 *buf) 2203 { 2204 memcpy(buf, def_control_mpage, sizeof(def_control_mpage)); 2205 return sizeof(def_control_mpage); 2206 } 2207 2208 /** 2209 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2210 * @buf: output buffer 2211 * 2212 * Generate a generic MODE SENSE r/w error recovery page. 2213 * 2214 * LOCKING: 2215 * None. 2216 */ 2217 static unsigned int ata_msense_rw_recovery(u8 *buf) 2218 { 2219 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage)); 2220 return sizeof(def_rw_recovery_mpage); 2221 } 2222 2223 /* 2224 * We can turn this into a real blacklist if it's needed, for now just 2225 * blacklist any Maxtor BANC1G10 revision firmware 2226 */ 2227 static int ata_dev_supports_fua(u16 *id) 2228 { 2229 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2230 2231 if (!libata_fua) 2232 return 0; 2233 if (!ata_id_has_fua(id)) 2234 return 0; 2235 2236 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2237 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2238 2239 if (strcmp(model, "Maxtor")) 2240 return 1; 2241 if (strcmp(fw, "BANC1G10")) 2242 return 1; 2243 2244 return 0; /* blacklisted */ 2245 } 2246 2247 /** 2248 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2249 * @args: device IDENTIFY data / SCSI command of interest. 2250 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2251 * 2252 * Simulate MODE SENSE commands. Assume this is invoked for direct 2253 * access devices (e.g. disks) only. There should be no block 2254 * descriptor for other device types. 2255 * 2256 * LOCKING: 2257 * spin_lock_irqsave(host lock) 2258 */ 2259 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2260 { 2261 struct ata_device *dev = args->dev; 2262 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2263 const u8 sat_blk_desc[] = { 2264 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2265 0, 2266 0, 0x2, 0x0 /* block length: 512 bytes */ 2267 }; 2268 u8 pg, spg; 2269 unsigned int ebd, page_control, six_byte; 2270 u8 dpofua; 2271 2272 VPRINTK("ENTER\n"); 2273 2274 six_byte = (scsicmd[0] == MODE_SENSE); 2275 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2276 /* 2277 * LLBA bit in msense(10) ignored (compliant) 2278 */ 2279 2280 page_control = scsicmd[2] >> 6; 2281 switch (page_control) { 2282 case 0: /* current */ 2283 break; /* supported */ 2284 case 3: /* saved */ 2285 goto saving_not_supp; 2286 case 1: /* changeable */ 2287 case 2: /* defaults */ 2288 default: 2289 goto invalid_fld; 2290 } 2291 2292 if (six_byte) 2293 p += 4 + (ebd ? 8 : 0); 2294 else 2295 p += 8 + (ebd ? 8 : 0); 2296 2297 pg = scsicmd[2] & 0x3f; 2298 spg = scsicmd[3]; 2299 /* 2300 * No mode subpages supported (yet) but asking for _all_ 2301 * subpages may be valid 2302 */ 2303 if (spg && (spg != ALL_SUB_MPAGES)) 2304 goto invalid_fld; 2305 2306 switch(pg) { 2307 case RW_RECOVERY_MPAGE: 2308 p += ata_msense_rw_recovery(p); 2309 break; 2310 2311 case CACHE_MPAGE: 2312 p += ata_msense_caching(args->id, p); 2313 break; 2314 2315 case CONTROL_MPAGE: 2316 p += ata_msense_ctl_mode(p); 2317 break; 2318 2319 case ALL_MPAGES: 2320 p += ata_msense_rw_recovery(p); 2321 p += ata_msense_caching(args->id, p); 2322 p += ata_msense_ctl_mode(p); 2323 break; 2324 2325 default: /* invalid page code */ 2326 goto invalid_fld; 2327 } 2328 2329 dpofua = 0; 2330 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2331 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2332 dpofua = 1 << 4; 2333 2334 if (six_byte) { 2335 rbuf[0] = p - rbuf - 1; 2336 rbuf[2] |= dpofua; 2337 if (ebd) { 2338 rbuf[3] = sizeof(sat_blk_desc); 2339 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2340 } 2341 } else { 2342 unsigned int output_len = p - rbuf - 2; 2343 2344 rbuf[0] = output_len >> 8; 2345 rbuf[1] = output_len; 2346 rbuf[3] |= dpofua; 2347 if (ebd) { 2348 rbuf[7] = sizeof(sat_blk_desc); 2349 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2350 } 2351 } 2352 return 0; 2353 2354 invalid_fld: 2355 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); 2356 /* "Invalid field in cbd" */ 2357 return 1; 2358 2359 saving_not_supp: 2360 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2361 /* "Saving parameters not supported" */ 2362 return 1; 2363 } 2364 2365 /** 2366 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2367 * @args: device IDENTIFY data / SCSI command of interest. 2368 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2369 * 2370 * Simulate READ CAPACITY commands. 2371 * 2372 * LOCKING: 2373 * None. 2374 */ 2375 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2376 { 2377 struct ata_device *dev = args->dev; 2378 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2379 u32 sector_size; /* physical sector size in bytes */ 2380 u8 log2_per_phys; 2381 u16 lowest_aligned; 2382 2383 sector_size = ata_id_logical_sector_size(dev->id); 2384 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2385 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2386 2387 VPRINTK("ENTER\n"); 2388 2389 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2390 if (last_lba >= 0xffffffffULL) 2391 last_lba = 0xffffffff; 2392 2393 /* sector count, 32-bit */ 2394 rbuf[0] = last_lba >> (8 * 3); 2395 rbuf[1] = last_lba >> (8 * 2); 2396 rbuf[2] = last_lba >> (8 * 1); 2397 rbuf[3] = last_lba; 2398 2399 /* sector size */ 2400 rbuf[4] = sector_size >> (8 * 3); 2401 rbuf[5] = sector_size >> (8 * 2); 2402 rbuf[6] = sector_size >> (8 * 1); 2403 rbuf[7] = sector_size; 2404 } else { 2405 /* sector count, 64-bit */ 2406 rbuf[0] = last_lba >> (8 * 7); 2407 rbuf[1] = last_lba >> (8 * 6); 2408 rbuf[2] = last_lba >> (8 * 5); 2409 rbuf[3] = last_lba >> (8 * 4); 2410 rbuf[4] = last_lba >> (8 * 3); 2411 rbuf[5] = last_lba >> (8 * 2); 2412 rbuf[6] = last_lba >> (8 * 1); 2413 rbuf[7] = last_lba; 2414 2415 /* sector size */ 2416 rbuf[ 8] = sector_size >> (8 * 3); 2417 rbuf[ 9] = sector_size >> (8 * 2); 2418 rbuf[10] = sector_size >> (8 * 1); 2419 rbuf[11] = sector_size; 2420 2421 rbuf[12] = 0; 2422 rbuf[13] = log2_per_phys; 2423 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2424 rbuf[15] = lowest_aligned; 2425 2426 if (ata_id_has_trim(args->id)) { 2427 rbuf[14] |= 0x80; /* TPE */ 2428 2429 if (ata_id_has_zero_after_trim(args->id)) 2430 rbuf[14] |= 0x40; /* TPRZ */ 2431 } 2432 } 2433 2434 return 0; 2435 } 2436 2437 /** 2438 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2439 * @args: device IDENTIFY data / SCSI command of interest. 2440 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2441 * 2442 * Simulate REPORT LUNS command. 2443 * 2444 * LOCKING: 2445 * spin_lock_irqsave(host lock) 2446 */ 2447 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2448 { 2449 VPRINTK("ENTER\n"); 2450 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2451 2452 return 0; 2453 } 2454 2455 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2456 { 2457 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2458 /* FIXME: not quite right; we don't want the 2459 * translation of taskfile registers into 2460 * a sense descriptors, since that's only 2461 * correct for ATA, not ATAPI 2462 */ 2463 ata_gen_passthru_sense(qc); 2464 } 2465 2466 qc->scsidone(qc->scsicmd); 2467 ata_qc_free(qc); 2468 } 2469 2470 /* is it pointless to prefer PIO for "safety reasons"? */ 2471 static inline int ata_pio_use_silly(struct ata_port *ap) 2472 { 2473 return (ap->flags & ATA_FLAG_PIO_DMA); 2474 } 2475 2476 static void atapi_request_sense(struct ata_queued_cmd *qc) 2477 { 2478 struct ata_port *ap = qc->ap; 2479 struct scsi_cmnd *cmd = qc->scsicmd; 2480 2481 DPRINTK("ATAPI request sense\n"); 2482 2483 /* FIXME: is this needed? */ 2484 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2485 2486 #ifdef CONFIG_ATA_SFF 2487 if (ap->ops->sff_tf_read) 2488 ap->ops->sff_tf_read(ap, &qc->tf); 2489 #endif 2490 2491 /* fill these in, for the case where they are -not- overwritten */ 2492 cmd->sense_buffer[0] = 0x70; 2493 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2494 2495 ata_qc_reinit(qc); 2496 2497 /* setup sg table and init transfer direction */ 2498 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2499 ata_sg_init(qc, &qc->sgent, 1); 2500 qc->dma_dir = DMA_FROM_DEVICE; 2501 2502 memset(&qc->cdb, 0, qc->dev->cdb_len); 2503 qc->cdb[0] = REQUEST_SENSE; 2504 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2505 2506 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2507 qc->tf.command = ATA_CMD_PACKET; 2508 2509 if (ata_pio_use_silly(ap)) { 2510 qc->tf.protocol = ATAPI_PROT_DMA; 2511 qc->tf.feature |= ATAPI_PKT_DMA; 2512 } else { 2513 qc->tf.protocol = ATAPI_PROT_PIO; 2514 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2515 qc->tf.lbah = 0; 2516 } 2517 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2518 2519 qc->complete_fn = atapi_sense_complete; 2520 2521 ata_qc_issue(qc); 2522 2523 DPRINTK("EXIT\n"); 2524 } 2525 2526 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2527 { 2528 struct scsi_cmnd *cmd = qc->scsicmd; 2529 unsigned int err_mask = qc->err_mask; 2530 2531 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2532 2533 /* handle completion from new EH */ 2534 if (unlikely(qc->ap->ops->error_handler && 2535 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2536 2537 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2538 /* FIXME: not quite right; we don't want the 2539 * translation of taskfile registers into a 2540 * sense descriptors, since that's only 2541 * correct for ATA, not ATAPI 2542 */ 2543 ata_gen_passthru_sense(qc); 2544 } 2545 2546 /* SCSI EH automatically locks door if sdev->locked is 2547 * set. Sometimes door lock request continues to 2548 * fail, for example, when no media is present. This 2549 * creates a loop - SCSI EH issues door lock which 2550 * fails and gets invoked again to acquire sense data 2551 * for the failed command. 2552 * 2553 * If door lock fails, always clear sdev->locked to 2554 * avoid this infinite loop. 2555 * 2556 * This may happen before SCSI scan is complete. Make 2557 * sure qc->dev->sdev isn't NULL before dereferencing. 2558 */ 2559 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2560 qc->dev->sdev->locked = 0; 2561 2562 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2563 qc->scsidone(cmd); 2564 ata_qc_free(qc); 2565 return; 2566 } 2567 2568 /* successful completion or old EH failure path */ 2569 if (unlikely(err_mask & AC_ERR_DEV)) { 2570 cmd->result = SAM_STAT_CHECK_CONDITION; 2571 atapi_request_sense(qc); 2572 return; 2573 } else if (unlikely(err_mask)) { 2574 /* FIXME: not quite right; we don't want the 2575 * translation of taskfile registers into 2576 * a sense descriptors, since that's only 2577 * correct for ATA, not ATAPI 2578 */ 2579 ata_gen_passthru_sense(qc); 2580 } else { 2581 u8 *scsicmd = cmd->cmnd; 2582 2583 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { 2584 unsigned long flags; 2585 u8 *buf; 2586 2587 buf = ata_scsi_rbuf_get(cmd, true, &flags); 2588 2589 /* ATAPI devices typically report zero for their SCSI version, 2590 * and sometimes deviate from the spec WRT response data 2591 * format. If SCSI version is reported as zero like normal, 2592 * then we make the following fixups: 1) Fake MMC-5 version, 2593 * to indicate to the Linux scsi midlayer this is a modern 2594 * device. 2) Ensure response data format / ATAPI information 2595 * are always correct. 2596 */ 2597 if (buf[2] == 0) { 2598 buf[2] = 0x5; 2599 buf[3] = 0x32; 2600 } 2601 2602 ata_scsi_rbuf_put(cmd, true, &flags); 2603 } 2604 2605 cmd->result = SAM_STAT_GOOD; 2606 } 2607 2608 qc->scsidone(cmd); 2609 ata_qc_free(qc); 2610 } 2611 /** 2612 * atapi_xlat - Initialize PACKET taskfile 2613 * @qc: command structure to be initialized 2614 * 2615 * LOCKING: 2616 * spin_lock_irqsave(host lock) 2617 * 2618 * RETURNS: 2619 * Zero on success, non-zero on failure. 2620 */ 2621 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2622 { 2623 struct scsi_cmnd *scmd = qc->scsicmd; 2624 struct ata_device *dev = qc->dev; 2625 int nodata = (scmd->sc_data_direction == DMA_NONE); 2626 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2627 unsigned int nbytes; 2628 2629 memset(qc->cdb, 0, dev->cdb_len); 2630 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2631 2632 qc->complete_fn = atapi_qc_complete; 2633 2634 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2635 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2636 qc->tf.flags |= ATA_TFLAG_WRITE; 2637 DPRINTK("direction: write\n"); 2638 } 2639 2640 qc->tf.command = ATA_CMD_PACKET; 2641 ata_qc_set_pc_nbytes(qc); 2642 2643 /* check whether ATAPI DMA is safe */ 2644 if (!nodata && !using_pio && atapi_check_dma(qc)) 2645 using_pio = 1; 2646 2647 /* Some controller variants snoop this value for Packet 2648 * transfers to do state machine and FIFO management. Thus we 2649 * want to set it properly, and for DMA where it is 2650 * effectively meaningless. 2651 */ 2652 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2653 2654 /* Most ATAPI devices which honor transfer chunk size don't 2655 * behave according to the spec when odd chunk size which 2656 * matches the transfer length is specified. If the number of 2657 * bytes to transfer is 2n+1. According to the spec, what 2658 * should happen is to indicate that 2n+1 is going to be 2659 * transferred and transfer 2n+2 bytes where the last byte is 2660 * padding. 2661 * 2662 * In practice, this doesn't happen. ATAPI devices first 2663 * indicate and transfer 2n bytes and then indicate and 2664 * transfer 2 bytes where the last byte is padding. 2665 * 2666 * This inconsistency confuses several controllers which 2667 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2668 * These controllers use actual number of transferred bytes to 2669 * update DMA poitner and transfer of 4n+2 bytes make those 2670 * controller push DMA pointer by 4n+4 bytes because SATA data 2671 * FISes are aligned to 4 bytes. This causes data corruption 2672 * and buffer overrun. 2673 * 2674 * Always setting nbytes to even number solves this problem 2675 * because then ATAPI devices don't have to split data at 2n 2676 * boundaries. 2677 */ 2678 if (nbytes & 0x1) 2679 nbytes++; 2680 2681 qc->tf.lbam = (nbytes & 0xFF); 2682 qc->tf.lbah = (nbytes >> 8); 2683 2684 if (nodata) 2685 qc->tf.protocol = ATAPI_PROT_NODATA; 2686 else if (using_pio) 2687 qc->tf.protocol = ATAPI_PROT_PIO; 2688 else { 2689 /* DMA data xfer */ 2690 qc->tf.protocol = ATAPI_PROT_DMA; 2691 qc->tf.feature |= ATAPI_PKT_DMA; 2692 2693 if ((dev->flags & ATA_DFLAG_DMADIR) && 2694 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2695 /* some SATA bridges need us to indicate data xfer direction */ 2696 qc->tf.feature |= ATAPI_DMADIR; 2697 } 2698 2699 2700 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2701 as ATAPI tape drives don't get this right otherwise */ 2702 return 0; 2703 } 2704 2705 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2706 { 2707 if (!sata_pmp_attached(ap)) { 2708 if (likely(devno < ata_link_max_devices(&ap->link))) 2709 return &ap->link.device[devno]; 2710 } else { 2711 if (likely(devno < ap->nr_pmp_links)) 2712 return &ap->pmp_link[devno].device[0]; 2713 } 2714 2715 return NULL; 2716 } 2717 2718 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2719 const struct scsi_device *scsidev) 2720 { 2721 int devno; 2722 2723 /* skip commands not addressed to targets we simulate */ 2724 if (!sata_pmp_attached(ap)) { 2725 if (unlikely(scsidev->channel || scsidev->lun)) 2726 return NULL; 2727 devno = scsidev->id; 2728 } else { 2729 if (unlikely(scsidev->id || scsidev->lun)) 2730 return NULL; 2731 devno = scsidev->channel; 2732 } 2733 2734 return ata_find_dev(ap, devno); 2735 } 2736 2737 /** 2738 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2739 * @ap: ATA port to which the device is attached 2740 * @scsidev: SCSI device from which we derive the ATA device 2741 * 2742 * Given various information provided in struct scsi_cmnd, 2743 * map that onto an ATA bus, and using that mapping 2744 * determine which ata_device is associated with the 2745 * SCSI command to be sent. 2746 * 2747 * LOCKING: 2748 * spin_lock_irqsave(host lock) 2749 * 2750 * RETURNS: 2751 * Associated ATA device, or %NULL if not found. 2752 */ 2753 static struct ata_device * 2754 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2755 { 2756 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2757 2758 if (unlikely(!dev || !ata_dev_enabled(dev))) 2759 return NULL; 2760 2761 return dev; 2762 } 2763 2764 /* 2765 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2766 * @byte1: Byte 1 from pass-thru CDB. 2767 * 2768 * RETURNS: 2769 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2770 */ 2771 static u8 2772 ata_scsi_map_proto(u8 byte1) 2773 { 2774 switch((byte1 & 0x1e) >> 1) { 2775 case 3: /* Non-data */ 2776 return ATA_PROT_NODATA; 2777 2778 case 6: /* DMA */ 2779 case 10: /* UDMA Data-in */ 2780 case 11: /* UDMA Data-Out */ 2781 return ATA_PROT_DMA; 2782 2783 case 4: /* PIO Data-in */ 2784 case 5: /* PIO Data-out */ 2785 return ATA_PROT_PIO; 2786 2787 case 0: /* Hard Reset */ 2788 case 1: /* SRST */ 2789 case 8: /* Device Diagnostic */ 2790 case 9: /* Device Reset */ 2791 case 7: /* DMA Queued */ 2792 case 12: /* FPDMA */ 2793 case 15: /* Return Response Info */ 2794 default: /* Reserved */ 2795 break; 2796 } 2797 2798 return ATA_PROT_UNKNOWN; 2799 } 2800 2801 /** 2802 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2803 * @qc: command structure to be initialized 2804 * 2805 * Handles either 12 or 16-byte versions of the CDB. 2806 * 2807 * RETURNS: 2808 * Zero on success, non-zero on failure. 2809 */ 2810 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2811 { 2812 struct ata_taskfile *tf = &(qc->tf); 2813 struct scsi_cmnd *scmd = qc->scsicmd; 2814 struct ata_device *dev = qc->dev; 2815 const u8 *cdb = scmd->cmnd; 2816 2817 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) 2818 goto invalid_fld; 2819 2820 /* 2821 * 12 and 16 byte CDBs use different offsets to 2822 * provide the various register values. 2823 */ 2824 if (cdb[0] == ATA_16) { 2825 /* 2826 * 16-byte CDB - may contain extended commands. 2827 * 2828 * If that is the case, copy the upper byte register values. 2829 */ 2830 if (cdb[1] & 0x01) { 2831 tf->hob_feature = cdb[3]; 2832 tf->hob_nsect = cdb[5]; 2833 tf->hob_lbal = cdb[7]; 2834 tf->hob_lbam = cdb[9]; 2835 tf->hob_lbah = cdb[11]; 2836 tf->flags |= ATA_TFLAG_LBA48; 2837 } else 2838 tf->flags &= ~ATA_TFLAG_LBA48; 2839 2840 /* 2841 * Always copy low byte, device and command registers. 2842 */ 2843 tf->feature = cdb[4]; 2844 tf->nsect = cdb[6]; 2845 tf->lbal = cdb[8]; 2846 tf->lbam = cdb[10]; 2847 tf->lbah = cdb[12]; 2848 tf->device = cdb[13]; 2849 tf->command = cdb[14]; 2850 } else { 2851 /* 2852 * 12-byte CDB - incapable of extended commands. 2853 */ 2854 tf->flags &= ~ATA_TFLAG_LBA48; 2855 2856 tf->feature = cdb[3]; 2857 tf->nsect = cdb[4]; 2858 tf->lbal = cdb[5]; 2859 tf->lbam = cdb[6]; 2860 tf->lbah = cdb[7]; 2861 tf->device = cdb[8]; 2862 tf->command = cdb[9]; 2863 } 2864 2865 /* enforce correct master/slave bit */ 2866 tf->device = dev->devno ? 2867 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2868 2869 switch (tf->command) { 2870 /* READ/WRITE LONG use a non-standard sect_size */ 2871 case ATA_CMD_READ_LONG: 2872 case ATA_CMD_READ_LONG_ONCE: 2873 case ATA_CMD_WRITE_LONG: 2874 case ATA_CMD_WRITE_LONG_ONCE: 2875 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) 2876 goto invalid_fld; 2877 qc->sect_size = scsi_bufflen(scmd); 2878 break; 2879 2880 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2881 case ATA_CMD_CFA_WRITE_NE: 2882 case ATA_CMD_CFA_TRANS_SECT: 2883 case ATA_CMD_CFA_WRITE_MULT_NE: 2884 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2885 case ATA_CMD_READ: 2886 case ATA_CMD_READ_EXT: 2887 case ATA_CMD_READ_QUEUED: 2888 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2889 case ATA_CMD_FPDMA_READ: 2890 case ATA_CMD_READ_MULTI: 2891 case ATA_CMD_READ_MULTI_EXT: 2892 case ATA_CMD_PIO_READ: 2893 case ATA_CMD_PIO_READ_EXT: 2894 case ATA_CMD_READ_STREAM_DMA_EXT: 2895 case ATA_CMD_READ_STREAM_EXT: 2896 case ATA_CMD_VERIFY: 2897 case ATA_CMD_VERIFY_EXT: 2898 case ATA_CMD_WRITE: 2899 case ATA_CMD_WRITE_EXT: 2900 case ATA_CMD_WRITE_FUA_EXT: 2901 case ATA_CMD_WRITE_QUEUED: 2902 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2903 case ATA_CMD_FPDMA_WRITE: 2904 case ATA_CMD_WRITE_MULTI: 2905 case ATA_CMD_WRITE_MULTI_EXT: 2906 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2907 case ATA_CMD_PIO_WRITE: 2908 case ATA_CMD_PIO_WRITE_EXT: 2909 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2910 case ATA_CMD_WRITE_STREAM_EXT: 2911 qc->sect_size = scmd->device->sector_size; 2912 break; 2913 2914 /* Everything else uses 512 byte "sectors" */ 2915 default: 2916 qc->sect_size = ATA_SECT_SIZE; 2917 } 2918 2919 /* 2920 * Set flags so that all registers will be written, pass on 2921 * write indication (used for PIO/DMA setup), result TF is 2922 * copied back and we don't whine too much about its failure. 2923 */ 2924 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2925 if (scmd->sc_data_direction == DMA_TO_DEVICE) 2926 tf->flags |= ATA_TFLAG_WRITE; 2927 2928 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 2929 2930 /* 2931 * Set transfer length. 2932 * 2933 * TODO: find out if we need to do more here to 2934 * cover scatter/gather case. 2935 */ 2936 ata_qc_set_pc_nbytes(qc); 2937 2938 /* We may not issue DMA commands if no DMA mode is set */ 2939 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) 2940 goto invalid_fld; 2941 2942 /* sanity check for pio multi commands */ 2943 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) 2944 goto invalid_fld; 2945 2946 if (is_multi_taskfile(tf)) { 2947 unsigned int multi_count = 1 << (cdb[1] >> 5); 2948 2949 /* compare the passed through multi_count 2950 * with the cached multi_count of libata 2951 */ 2952 if (multi_count != dev->multi_count) 2953 ata_dev_printk(dev, KERN_WARNING, 2954 "invalid multi_count %u ignored\n", 2955 multi_count); 2956 } 2957 2958 /* 2959 * Filter SET_FEATURES - XFER MODE command -- otherwise, 2960 * SET_FEATURES - XFER MODE must be preceded/succeeded 2961 * by an update to hardware-specific registers for each 2962 * controller (i.e. the reason for ->set_piomode(), 2963 * ->set_dmamode(), and ->post_set_mode() hooks). 2964 */ 2965 if (tf->command == ATA_CMD_SET_FEATURES && 2966 tf->feature == SETFEATURES_XFER) 2967 goto invalid_fld; 2968 2969 /* 2970 * Filter TPM commands by default. These provide an 2971 * essentially uncontrolled encrypted "back door" between 2972 * applications and the disk. Set libata.allow_tpm=1 if you 2973 * have a real reason for wanting to use them. This ensures 2974 * that installed software cannot easily mess stuff up without 2975 * user intent. DVR type users will probably ship with this enabled 2976 * for movie content management. 2977 * 2978 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 2979 * for this and should do in future but that it is not sufficient as 2980 * DCS is an optional feature set. Thus we also do the software filter 2981 * so that we comply with the TC consortium stated goal that the user 2982 * can turn off TC features of their system. 2983 */ 2984 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) 2985 goto invalid_fld; 2986 2987 return 0; 2988 2989 invalid_fld: 2990 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); 2991 /* "Invalid field in cdb" */ 2992 return 1; 2993 } 2994 2995 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 2996 { 2997 struct ata_taskfile *tf = &qc->tf; 2998 struct scsi_cmnd *scmd = qc->scsicmd; 2999 struct ata_device *dev = qc->dev; 3000 const u8 *cdb = scmd->cmnd; 3001 u64 block; 3002 u32 n_block; 3003 u32 size; 3004 void *buf; 3005 3006 /* we may not issue DMA commands if no DMA mode is set */ 3007 if (unlikely(!dev->dma_mode)) 3008 goto invalid_fld; 3009 3010 if (unlikely(scmd->cmd_len < 16)) 3011 goto invalid_fld; 3012 scsi_16_lba_len(cdb, &block, &n_block); 3013 3014 /* for now we only support WRITE SAME with the unmap bit set */ 3015 if (unlikely(!(cdb[1] & 0x8))) 3016 goto invalid_fld; 3017 3018 /* 3019 * WRITE SAME always has a sector sized buffer as payload, this 3020 * should never be a multiple entry S/G list. 3021 */ 3022 if (!scsi_sg_count(scmd)) 3023 goto invalid_fld; 3024 3025 buf = page_address(sg_page(scsi_sglist(scmd))); 3026 size = ata_set_lba_range_entries(buf, 512, block, n_block); 3027 3028 tf->protocol = ATA_PROT_DMA; 3029 tf->hob_feature = 0; 3030 tf->feature = ATA_DSM_TRIM; 3031 tf->hob_nsect = (size / 512) >> 8; 3032 tf->nsect = size / 512; 3033 tf->command = ATA_CMD_DSM; 3034 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3035 ATA_TFLAG_WRITE; 3036 3037 ata_qc_set_pc_nbytes(qc); 3038 3039 return 0; 3040 3041 invalid_fld: 3042 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); 3043 /* "Invalid field in cdb" */ 3044 return 1; 3045 } 3046 3047 /** 3048 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3049 * @dev: ATA device 3050 * @cmd: SCSI command opcode to consider 3051 * 3052 * Look up the SCSI command given, and determine whether the 3053 * SCSI command is to be translated or simulated. 3054 * 3055 * RETURNS: 3056 * Pointer to translation function if possible, %NULL if not. 3057 */ 3058 3059 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3060 { 3061 switch (cmd) { 3062 case READ_6: 3063 case READ_10: 3064 case READ_16: 3065 3066 case WRITE_6: 3067 case WRITE_10: 3068 case WRITE_16: 3069 return ata_scsi_rw_xlat; 3070 3071 case WRITE_SAME_16: 3072 return ata_scsi_write_same_xlat; 3073 3074 case SYNCHRONIZE_CACHE: 3075 if (ata_try_flush_cache(dev)) 3076 return ata_scsi_flush_xlat; 3077 break; 3078 3079 case VERIFY: 3080 case VERIFY_16: 3081 return ata_scsi_verify_xlat; 3082 3083 case ATA_12: 3084 case ATA_16: 3085 return ata_scsi_pass_thru; 3086 3087 case START_STOP: 3088 return ata_scsi_start_stop_xlat; 3089 } 3090 3091 return NULL; 3092 } 3093 3094 /** 3095 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 3096 * @ap: ATA port to which the command was being sent 3097 * @cmd: SCSI command to dump 3098 * 3099 * Prints the contents of a SCSI command via printk(). 3100 */ 3101 3102 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 3103 struct scsi_cmnd *cmd) 3104 { 3105 #ifdef ATA_DEBUG 3106 struct scsi_device *scsidev = cmd->device; 3107 u8 *scsicmd = cmd->cmnd; 3108 3109 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 3110 ap->print_id, 3111 scsidev->channel, scsidev->id, scsidev->lun, 3112 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], 3113 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], 3114 scsicmd[8]); 3115 #endif 3116 } 3117 3118 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 3119 void (*done)(struct scsi_cmnd *), 3120 struct ata_device *dev) 3121 { 3122 u8 scsi_op = scmd->cmnd[0]; 3123 ata_xlat_func_t xlat_func; 3124 int rc = 0; 3125 3126 if (dev->class == ATA_DEV_ATA) { 3127 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 3128 goto bad_cdb_len; 3129 3130 xlat_func = ata_get_xlat_func(dev, scsi_op); 3131 } else { 3132 if (unlikely(!scmd->cmd_len)) 3133 goto bad_cdb_len; 3134 3135 xlat_func = NULL; 3136 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3137 /* relay SCSI command to ATAPI device */ 3138 int len = COMMAND_SIZE(scsi_op); 3139 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 3140 goto bad_cdb_len; 3141 3142 xlat_func = atapi_xlat; 3143 } else { 3144 /* ATA_16 passthru, treat as an ATA command */ 3145 if (unlikely(scmd->cmd_len > 16)) 3146 goto bad_cdb_len; 3147 3148 xlat_func = ata_get_xlat_func(dev, scsi_op); 3149 } 3150 } 3151 3152 if (xlat_func) 3153 rc = ata_scsi_translate(dev, scmd, done, xlat_func); 3154 else 3155 ata_scsi_simulate(dev, scmd, done); 3156 3157 return rc; 3158 3159 bad_cdb_len: 3160 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 3161 scmd->cmd_len, scsi_op, dev->cdb_len); 3162 scmd->result = DID_ERROR << 16; 3163 done(scmd); 3164 return 0; 3165 } 3166 3167 /** 3168 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 3169 * @shost: SCSI host of command to be sent 3170 * @cmd: SCSI command to be sent 3171 * 3172 * In some cases, this function translates SCSI commands into 3173 * ATA taskfiles, and queues the taskfiles to be sent to 3174 * hardware. In other cases, this function simulates a 3175 * SCSI device by evaluating and responding to certain 3176 * SCSI commands. This creates the overall effect of 3177 * ATA and ATAPI devices appearing as SCSI devices. 3178 * 3179 * LOCKING: 3180 * ATA host lock 3181 * 3182 * RETURNS: 3183 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 3184 * 0 otherwise. 3185 */ 3186 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 3187 { 3188 struct ata_port *ap; 3189 struct ata_device *dev; 3190 struct scsi_device *scsidev = cmd->device; 3191 int rc = 0; 3192 unsigned long irq_flags; 3193 3194 ap = ata_shost_to_port(shost); 3195 3196 spin_lock_irqsave(ap->lock, irq_flags); 3197 3198 ata_scsi_dump_cdb(ap, cmd); 3199 3200 dev = ata_scsi_find_dev(ap, scsidev); 3201 if (likely(dev)) 3202 rc = __ata_scsi_queuecmd(cmd, cmd->scsi_done, dev); 3203 else { 3204 cmd->result = (DID_BAD_TARGET << 16); 3205 cmd->scsi_done(cmd); 3206 } 3207 3208 spin_unlock_irqrestore(ap->lock, irq_flags); 3209 3210 return rc; 3211 } 3212 3213 /** 3214 * ata_scsi_simulate - simulate SCSI command on ATA device 3215 * @dev: the target device 3216 * @cmd: SCSI command being sent to device. 3217 * @done: SCSI command completion function. 3218 * 3219 * Interprets and directly executes a select list of SCSI commands 3220 * that can be handled internally. 3221 * 3222 * LOCKING: 3223 * spin_lock_irqsave(host lock) 3224 */ 3225 3226 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 3227 void (*done)(struct scsi_cmnd *)) 3228 { 3229 struct ata_scsi_args args; 3230 const u8 *scsicmd = cmd->cmnd; 3231 u8 tmp8; 3232 3233 args.dev = dev; 3234 args.id = dev->id; 3235 args.cmd = cmd; 3236 args.done = done; 3237 3238 switch(scsicmd[0]) { 3239 /* TODO: worth improving? */ 3240 case FORMAT_UNIT: 3241 ata_scsi_invalid_field(cmd, done); 3242 break; 3243 3244 case INQUIRY: 3245 if (scsicmd[1] & 2) /* is CmdDt set? */ 3246 ata_scsi_invalid_field(cmd, done); 3247 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 3248 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 3249 else switch (scsicmd[2]) { 3250 case 0x00: 3251 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 3252 break; 3253 case 0x80: 3254 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 3255 break; 3256 case 0x83: 3257 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 3258 break; 3259 case 0x89: 3260 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 3261 break; 3262 case 0xb0: 3263 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 3264 break; 3265 case 0xb1: 3266 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 3267 break; 3268 case 0xb2: 3269 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 3270 break; 3271 default: 3272 ata_scsi_invalid_field(cmd, done); 3273 break; 3274 } 3275 break; 3276 3277 case MODE_SENSE: 3278 case MODE_SENSE_10: 3279 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 3280 break; 3281 3282 case MODE_SELECT: /* unconditionally return */ 3283 case MODE_SELECT_10: /* bad-field-in-cdb */ 3284 ata_scsi_invalid_field(cmd, done); 3285 break; 3286 3287 case READ_CAPACITY: 3288 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 3289 break; 3290 3291 case SERVICE_ACTION_IN: 3292 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 3293 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 3294 else 3295 ata_scsi_invalid_field(cmd, done); 3296 break; 3297 3298 case REPORT_LUNS: 3299 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 3300 break; 3301 3302 case REQUEST_SENSE: 3303 ata_scsi_set_sense(cmd, 0, 0, 0); 3304 cmd->result = (DRIVER_SENSE << 24); 3305 done(cmd); 3306 break; 3307 3308 /* if we reach this, then writeback caching is disabled, 3309 * turning this into a no-op. 3310 */ 3311 case SYNCHRONIZE_CACHE: 3312 /* fall through */ 3313 3314 /* no-op's, complete with success */ 3315 case REZERO_UNIT: 3316 case SEEK_6: 3317 case SEEK_10: 3318 case TEST_UNIT_READY: 3319 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 3320 break; 3321 3322 case SEND_DIAGNOSTIC: 3323 tmp8 = scsicmd[1] & ~(1 << 3); 3324 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) 3325 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 3326 else 3327 ata_scsi_invalid_field(cmd, done); 3328 break; 3329 3330 /* all other commands */ 3331 default: 3332 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); 3333 /* "Invalid command operation code" */ 3334 done(cmd); 3335 break; 3336 } 3337 } 3338 3339 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 3340 { 3341 int i, rc; 3342 3343 for (i = 0; i < host->n_ports; i++) { 3344 struct ata_port *ap = host->ports[i]; 3345 struct Scsi_Host *shost; 3346 3347 rc = -ENOMEM; 3348 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 3349 if (!shost) 3350 goto err_alloc; 3351 3352 *(struct ata_port **)&shost->hostdata[0] = ap; 3353 ap->scsi_host = shost; 3354 3355 shost->transportt = ata_scsi_transport_template; 3356 shost->unique_id = ap->print_id; 3357 shost->max_id = 16; 3358 shost->max_lun = 1; 3359 shost->max_channel = 1; 3360 shost->max_cmd_len = 16; 3361 3362 /* Schedule policy is determined by ->qc_defer() 3363 * callback and it needs to see every deferred qc. 3364 * Set host_blocked to 1 to prevent SCSI midlayer from 3365 * automatically deferring requests. 3366 */ 3367 shost->max_host_blocked = 1; 3368 3369 rc = scsi_add_host(ap->scsi_host, ap->host->dev); 3370 if (rc) 3371 goto err_add; 3372 } 3373 3374 return 0; 3375 3376 err_add: 3377 scsi_host_put(host->ports[i]->scsi_host); 3378 err_alloc: 3379 while (--i >= 0) { 3380 struct Scsi_Host *shost = host->ports[i]->scsi_host; 3381 3382 scsi_remove_host(shost); 3383 scsi_host_put(shost); 3384 } 3385 return rc; 3386 } 3387 3388 void ata_scsi_scan_host(struct ata_port *ap, int sync) 3389 { 3390 int tries = 5; 3391 struct ata_device *last_failed_dev = NULL; 3392 struct ata_link *link; 3393 struct ata_device *dev; 3394 3395 repeat: 3396 ata_for_each_link(link, ap, EDGE) { 3397 ata_for_each_dev(dev, link, ENABLED) { 3398 struct scsi_device *sdev; 3399 int channel = 0, id = 0; 3400 3401 if (dev->sdev) 3402 continue; 3403 3404 if (ata_is_host_link(link)) 3405 id = dev->devno; 3406 else 3407 channel = link->pmp; 3408 3409 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 3410 NULL); 3411 if (!IS_ERR(sdev)) { 3412 dev->sdev = sdev; 3413 scsi_device_put(sdev); 3414 } else { 3415 dev->sdev = NULL; 3416 } 3417 } 3418 } 3419 3420 /* If we scanned while EH was in progress or allocation 3421 * failure occurred, scan would have failed silently. Check 3422 * whether all devices are attached. 3423 */ 3424 ata_for_each_link(link, ap, EDGE) { 3425 ata_for_each_dev(dev, link, ENABLED) { 3426 if (!dev->sdev) 3427 goto exit_loop; 3428 } 3429 } 3430 exit_loop: 3431 if (!link) 3432 return; 3433 3434 /* we're missing some SCSI devices */ 3435 if (sync) { 3436 /* If caller requested synchrnous scan && we've made 3437 * any progress, sleep briefly and repeat. 3438 */ 3439 if (dev != last_failed_dev) { 3440 msleep(100); 3441 last_failed_dev = dev; 3442 goto repeat; 3443 } 3444 3445 /* We might be failing to detect boot device, give it 3446 * a few more chances. 3447 */ 3448 if (--tries) { 3449 msleep(100); 3450 goto repeat; 3451 } 3452 3453 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " 3454 "failed without making any progress,\n" 3455 " switching to async\n"); 3456 } 3457 3458 queue_delayed_work(system_long_wq, &ap->hotplug_task, 3459 round_jiffies_relative(HZ)); 3460 } 3461 3462 /** 3463 * ata_scsi_offline_dev - offline attached SCSI device 3464 * @dev: ATA device to offline attached SCSI device for 3465 * 3466 * This function is called from ata_eh_hotplug() and responsible 3467 * for taking the SCSI device attached to @dev offline. This 3468 * function is called with host lock which protects dev->sdev 3469 * against clearing. 3470 * 3471 * LOCKING: 3472 * spin_lock_irqsave(host lock) 3473 * 3474 * RETURNS: 3475 * 1 if attached SCSI device exists, 0 otherwise. 3476 */ 3477 int ata_scsi_offline_dev(struct ata_device *dev) 3478 { 3479 if (dev->sdev) { 3480 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 3481 return 1; 3482 } 3483 return 0; 3484 } 3485 3486 /** 3487 * ata_scsi_remove_dev - remove attached SCSI device 3488 * @dev: ATA device to remove attached SCSI device for 3489 * 3490 * This function is called from ata_eh_scsi_hotplug() and 3491 * responsible for removing the SCSI device attached to @dev. 3492 * 3493 * LOCKING: 3494 * Kernel thread context (may sleep). 3495 */ 3496 static void ata_scsi_remove_dev(struct ata_device *dev) 3497 { 3498 struct ata_port *ap = dev->link->ap; 3499 struct scsi_device *sdev; 3500 unsigned long flags; 3501 3502 /* Alas, we need to grab scan_mutex to ensure SCSI device 3503 * state doesn't change underneath us and thus 3504 * scsi_device_get() always succeeds. The mutex locking can 3505 * be removed if there is __scsi_device_get() interface which 3506 * increments reference counts regardless of device state. 3507 */ 3508 mutex_lock(&ap->scsi_host->scan_mutex); 3509 spin_lock_irqsave(ap->lock, flags); 3510 3511 /* clearing dev->sdev is protected by host lock */ 3512 sdev = dev->sdev; 3513 dev->sdev = NULL; 3514 3515 if (sdev) { 3516 /* If user initiated unplug races with us, sdev can go 3517 * away underneath us after the host lock and 3518 * scan_mutex are released. Hold onto it. 3519 */ 3520 if (scsi_device_get(sdev) == 0) { 3521 /* The following ensures the attached sdev is 3522 * offline on return from ata_scsi_offline_dev() 3523 * regardless it wins or loses the race 3524 * against this function. 3525 */ 3526 scsi_device_set_state(sdev, SDEV_OFFLINE); 3527 } else { 3528 WARN_ON(1); 3529 sdev = NULL; 3530 } 3531 } 3532 3533 spin_unlock_irqrestore(ap->lock, flags); 3534 mutex_unlock(&ap->scsi_host->scan_mutex); 3535 3536 if (sdev) { 3537 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", 3538 dev_name(&sdev->sdev_gendev)); 3539 3540 scsi_remove_device(sdev); 3541 scsi_device_put(sdev); 3542 } 3543 } 3544 3545 static void ata_scsi_handle_link_detach(struct ata_link *link) 3546 { 3547 struct ata_port *ap = link->ap; 3548 struct ata_device *dev; 3549 3550 ata_for_each_dev(dev, link, ALL) { 3551 unsigned long flags; 3552 3553 if (!(dev->flags & ATA_DFLAG_DETACHED)) 3554 continue; 3555 3556 spin_lock_irqsave(ap->lock, flags); 3557 dev->flags &= ~ATA_DFLAG_DETACHED; 3558 spin_unlock_irqrestore(ap->lock, flags); 3559 3560 ata_scsi_remove_dev(dev); 3561 } 3562 } 3563 3564 /** 3565 * ata_scsi_media_change_notify - send media change event 3566 * @dev: Pointer to the disk device with media change event 3567 * 3568 * Tell the block layer to send a media change notification 3569 * event. 3570 * 3571 * LOCKING: 3572 * spin_lock_irqsave(host lock) 3573 */ 3574 void ata_scsi_media_change_notify(struct ata_device *dev) 3575 { 3576 if (dev->sdev) 3577 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 3578 GFP_ATOMIC); 3579 } 3580 3581 /** 3582 * ata_scsi_hotplug - SCSI part of hotplug 3583 * @work: Pointer to ATA port to perform SCSI hotplug on 3584 * 3585 * Perform SCSI part of hotplug. It's executed from a separate 3586 * workqueue after EH completes. This is necessary because SCSI 3587 * hot plugging requires working EH and hot unplugging is 3588 * synchronized with hot plugging with a mutex. 3589 * 3590 * LOCKING: 3591 * Kernel thread context (may sleep). 3592 */ 3593 void ata_scsi_hotplug(struct work_struct *work) 3594 { 3595 struct ata_port *ap = 3596 container_of(work, struct ata_port, hotplug_task.work); 3597 int i; 3598 3599 if (ap->pflags & ATA_PFLAG_UNLOADING) { 3600 DPRINTK("ENTER/EXIT - unloading\n"); 3601 return; 3602 } 3603 3604 DPRINTK("ENTER\n"); 3605 mutex_lock(&ap->scsi_scan_mutex); 3606 3607 /* Unplug detached devices. We cannot use link iterator here 3608 * because PMP links have to be scanned even if PMP is 3609 * currently not attached. Iterate manually. 3610 */ 3611 ata_scsi_handle_link_detach(&ap->link); 3612 if (ap->pmp_link) 3613 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 3614 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 3615 3616 /* scan for new ones */ 3617 ata_scsi_scan_host(ap, 0); 3618 3619 mutex_unlock(&ap->scsi_scan_mutex); 3620 DPRINTK("EXIT\n"); 3621 } 3622 3623 /** 3624 * ata_scsi_user_scan - indication for user-initiated bus scan 3625 * @shost: SCSI host to scan 3626 * @channel: Channel to scan 3627 * @id: ID to scan 3628 * @lun: LUN to scan 3629 * 3630 * This function is called when user explicitly requests bus 3631 * scan. Set probe pending flag and invoke EH. 3632 * 3633 * LOCKING: 3634 * SCSI layer (we don't care) 3635 * 3636 * RETURNS: 3637 * Zero. 3638 */ 3639 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 3640 unsigned int id, unsigned int lun) 3641 { 3642 struct ata_port *ap = ata_shost_to_port(shost); 3643 unsigned long flags; 3644 int devno, rc = 0; 3645 3646 if (!ap->ops->error_handler) 3647 return -EOPNOTSUPP; 3648 3649 if (lun != SCAN_WILD_CARD && lun) 3650 return -EINVAL; 3651 3652 if (!sata_pmp_attached(ap)) { 3653 if (channel != SCAN_WILD_CARD && channel) 3654 return -EINVAL; 3655 devno = id; 3656 } else { 3657 if (id != SCAN_WILD_CARD && id) 3658 return -EINVAL; 3659 devno = channel; 3660 } 3661 3662 spin_lock_irqsave(ap->lock, flags); 3663 3664 if (devno == SCAN_WILD_CARD) { 3665 struct ata_link *link; 3666 3667 ata_for_each_link(link, ap, EDGE) { 3668 struct ata_eh_info *ehi = &link->eh_info; 3669 ehi->probe_mask |= ATA_ALL_DEVICES; 3670 ehi->action |= ATA_EH_RESET; 3671 } 3672 } else { 3673 struct ata_device *dev = ata_find_dev(ap, devno); 3674 3675 if (dev) { 3676 struct ata_eh_info *ehi = &dev->link->eh_info; 3677 ehi->probe_mask |= 1 << dev->devno; 3678 ehi->action |= ATA_EH_RESET; 3679 } else 3680 rc = -EINVAL; 3681 } 3682 3683 if (rc == 0) { 3684 ata_port_schedule_eh(ap); 3685 spin_unlock_irqrestore(ap->lock, flags); 3686 ata_port_wait_eh(ap); 3687 } else 3688 spin_unlock_irqrestore(ap->lock, flags); 3689 3690 return rc; 3691 } 3692 3693 /** 3694 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 3695 * @work: Pointer to ATA port to perform scsi_rescan_device() 3696 * 3697 * After ATA pass thru (SAT) commands are executed successfully, 3698 * libata need to propagate the changes to SCSI layer. 3699 * 3700 * LOCKING: 3701 * Kernel thread context (may sleep). 3702 */ 3703 void ata_scsi_dev_rescan(struct work_struct *work) 3704 { 3705 struct ata_port *ap = 3706 container_of(work, struct ata_port, scsi_rescan_task); 3707 struct ata_link *link; 3708 struct ata_device *dev; 3709 unsigned long flags; 3710 3711 mutex_lock(&ap->scsi_scan_mutex); 3712 spin_lock_irqsave(ap->lock, flags); 3713 3714 ata_for_each_link(link, ap, EDGE) { 3715 ata_for_each_dev(dev, link, ENABLED) { 3716 struct scsi_device *sdev = dev->sdev; 3717 3718 if (!sdev) 3719 continue; 3720 if (scsi_device_get(sdev)) 3721 continue; 3722 3723 spin_unlock_irqrestore(ap->lock, flags); 3724 scsi_rescan_device(&(sdev->sdev_gendev)); 3725 scsi_device_put(sdev); 3726 spin_lock_irqsave(ap->lock, flags); 3727 } 3728 } 3729 3730 spin_unlock_irqrestore(ap->lock, flags); 3731 mutex_unlock(&ap->scsi_scan_mutex); 3732 } 3733 3734 /** 3735 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 3736 * @host: ATA host container for all SAS ports 3737 * @port_info: Information from low-level host driver 3738 * @shost: SCSI host that the scsi device is attached to 3739 * 3740 * LOCKING: 3741 * PCI/etc. bus probe sem. 3742 * 3743 * RETURNS: 3744 * ata_port pointer on success / NULL on failure. 3745 */ 3746 3747 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 3748 struct ata_port_info *port_info, 3749 struct Scsi_Host *shost) 3750 { 3751 struct ata_port *ap; 3752 3753 ap = ata_port_alloc(host); 3754 if (!ap) 3755 return NULL; 3756 3757 ap->port_no = 0; 3758 ap->lock = shost->host_lock; 3759 ap->pio_mask = port_info->pio_mask; 3760 ap->mwdma_mask = port_info->mwdma_mask; 3761 ap->udma_mask = port_info->udma_mask; 3762 ap->flags |= port_info->flags; 3763 ap->ops = port_info->port_ops; 3764 ap->cbl = ATA_CBL_SATA; 3765 3766 return ap; 3767 } 3768 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 3769 3770 /** 3771 * ata_sas_port_start - Set port up for dma. 3772 * @ap: Port to initialize 3773 * 3774 * Called just after data structures for each port are 3775 * initialized. 3776 * 3777 * May be used as the port_start() entry in ata_port_operations. 3778 * 3779 * LOCKING: 3780 * Inherited from caller. 3781 */ 3782 int ata_sas_port_start(struct ata_port *ap) 3783 { 3784 return 0; 3785 } 3786 EXPORT_SYMBOL_GPL(ata_sas_port_start); 3787 3788 /** 3789 * ata_port_stop - Undo ata_sas_port_start() 3790 * @ap: Port to shut down 3791 * 3792 * May be used as the port_stop() entry in ata_port_operations. 3793 * 3794 * LOCKING: 3795 * Inherited from caller. 3796 */ 3797 3798 void ata_sas_port_stop(struct ata_port *ap) 3799 { 3800 } 3801 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 3802 3803 /** 3804 * ata_sas_port_init - Initialize a SATA device 3805 * @ap: SATA port to initialize 3806 * 3807 * LOCKING: 3808 * PCI/etc. bus probe sem. 3809 * 3810 * RETURNS: 3811 * Zero on success, non-zero on error. 3812 */ 3813 3814 int ata_sas_port_init(struct ata_port *ap) 3815 { 3816 int rc = ap->ops->port_start(ap); 3817 3818 if (!rc) { 3819 ap->print_id = ata_print_id++; 3820 rc = ata_bus_probe(ap); 3821 } 3822 3823 return rc; 3824 } 3825 EXPORT_SYMBOL_GPL(ata_sas_port_init); 3826 3827 /** 3828 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 3829 * @ap: SATA port to destroy 3830 * 3831 */ 3832 3833 void ata_sas_port_destroy(struct ata_port *ap) 3834 { 3835 if (ap->ops->port_stop) 3836 ap->ops->port_stop(ap); 3837 kfree(ap); 3838 } 3839 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 3840 3841 /** 3842 * ata_sas_slave_configure - Default slave_config routine for libata devices 3843 * @sdev: SCSI device to configure 3844 * @ap: ATA port to which SCSI device is attached 3845 * 3846 * RETURNS: 3847 * Zero. 3848 */ 3849 3850 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 3851 { 3852 ata_scsi_sdev_config(sdev); 3853 ata_scsi_dev_config(sdev, ap->link.device); 3854 return 0; 3855 } 3856 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 3857 3858 /** 3859 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 3860 * @cmd: SCSI command to be sent 3861 * @done: Completion function, called when command is complete 3862 * @ap: ATA port to which the command is being sent 3863 * 3864 * RETURNS: 3865 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 3866 * 0 otherwise. 3867 */ 3868 3869 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 3870 struct ata_port *ap) 3871 { 3872 int rc = 0; 3873 3874 ata_scsi_dump_cdb(ap, cmd); 3875 3876 if (likely(ata_dev_enabled(ap->link.device))) 3877 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device); 3878 else { 3879 cmd->result = (DID_BAD_TARGET << 16); 3880 done(cmd); 3881 } 3882 return rc; 3883 } 3884 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 3885