1 /* 2 * libata-scsi.c - helper library for ATA 3 * 4 * Maintained by: Jeff Garzik <jgarzik@pobox.com> 5 * Please ALWAYS copy linux-ide@vger.kernel.org 6 * on emails. 7 * 8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 9 * Copyright 2003-2004 Jeff Garzik 10 * 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2, or (at your option) 15 * any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; see the file COPYING. If not, write to 24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 25 * 26 * 27 * libata documentation is available via 'make {ps|pdf}docs', 28 * as Documentation/DocBook/libata.* 29 * 30 * Hardware documentation available from 31 * - http://www.t10.org/ 32 * - http://www.t13.org/ 33 * 34 */ 35 36 #include <linux/slab.h> 37 #include <linux/kernel.h> 38 #include <linux/blkdev.h> 39 #include <linux/spinlock.h> 40 #include <scsi/scsi.h> 41 #include <scsi/scsi_host.h> 42 #include <scsi/scsi_cmnd.h> 43 #include <scsi/scsi_eh.h> 44 #include <scsi/scsi_device.h> 45 #include <scsi/scsi_tcq.h> 46 #include <scsi/scsi_transport.h> 47 #include <linux/libata.h> 48 #include <linux/hdreg.h> 49 #include <linux/uaccess.h> 50 #include <linux/suspend.h> 51 #include <asm/unaligned.h> 52 53 #include "libata.h" 54 #include "libata-transport.h" 55 56 #define ATA_SCSI_RBUF_SIZE 4096 57 58 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 59 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 60 61 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 62 63 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 64 const struct scsi_device *scsidev); 65 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, 66 const struct scsi_device *scsidev); 67 68 #define RW_RECOVERY_MPAGE 0x1 69 #define RW_RECOVERY_MPAGE_LEN 12 70 #define CACHE_MPAGE 0x8 71 #define CACHE_MPAGE_LEN 20 72 #define CONTROL_MPAGE 0xa 73 #define CONTROL_MPAGE_LEN 12 74 #define ALL_MPAGES 0x3f 75 #define ALL_SUB_MPAGES 0xff 76 77 78 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 79 RW_RECOVERY_MPAGE, 80 RW_RECOVERY_MPAGE_LEN - 2, 81 (1 << 7), /* AWRE */ 82 0, /* read retry count */ 83 0, 0, 0, 0, 84 0, /* write retry count */ 85 0, 0, 0 86 }; 87 88 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 89 CACHE_MPAGE, 90 CACHE_MPAGE_LEN - 2, 91 0, /* contains WCE, needs to be 0 for logic */ 92 0, 0, 0, 0, 0, 0, 0, 0, 0, 93 0, /* contains DRA, needs to be 0 for logic */ 94 0, 0, 0, 0, 0, 0, 0 95 }; 96 97 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 98 CONTROL_MPAGE, 99 CONTROL_MPAGE_LEN - 2, 100 2, /* DSENSE=0, GLTSD=1 */ 101 0, /* [QAM+QERR may be 1, see 05-359r1] */ 102 0, 0, 0, 0, 0xff, 0xff, 103 0, 30 /* extended self test time, see 05-359r1 */ 104 }; 105 106 static const char *ata_lpm_policy_names[] = { 107 [ATA_LPM_UNKNOWN] = "max_performance", 108 [ATA_LPM_MAX_POWER] = "max_performance", 109 [ATA_LPM_MED_POWER] = "medium_power", 110 [ATA_LPM_MIN_POWER] = "min_power", 111 }; 112 113 static ssize_t ata_scsi_lpm_store(struct device *dev, 114 struct device_attribute *attr, 115 const char *buf, size_t count) 116 { 117 struct Scsi_Host *shost = class_to_shost(dev); 118 struct ata_port *ap = ata_shost_to_port(shost); 119 enum ata_lpm_policy policy; 120 unsigned long flags; 121 122 /* UNKNOWN is internal state, iterate from MAX_POWER */ 123 for (policy = ATA_LPM_MAX_POWER; 124 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) { 125 const char *name = ata_lpm_policy_names[policy]; 126 127 if (strncmp(name, buf, strlen(name)) == 0) 128 break; 129 } 130 if (policy == ARRAY_SIZE(ata_lpm_policy_names)) 131 return -EINVAL; 132 133 spin_lock_irqsave(ap->lock, flags); 134 ap->target_lpm_policy = policy; 135 ata_port_schedule_eh(ap); 136 spin_unlock_irqrestore(ap->lock, flags); 137 138 return count; 139 } 140 141 static ssize_t ata_scsi_lpm_show(struct device *dev, 142 struct device_attribute *attr, char *buf) 143 { 144 struct Scsi_Host *shost = class_to_shost(dev); 145 struct ata_port *ap = ata_shost_to_port(shost); 146 147 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names)) 148 return -EINVAL; 149 150 return snprintf(buf, PAGE_SIZE, "%s\n", 151 ata_lpm_policy_names[ap->target_lpm_policy]); 152 } 153 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, 154 ata_scsi_lpm_show, ata_scsi_lpm_store); 155 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); 156 157 static ssize_t ata_scsi_park_show(struct device *device, 158 struct device_attribute *attr, char *buf) 159 { 160 struct scsi_device *sdev = to_scsi_device(device); 161 struct ata_port *ap; 162 struct ata_link *link; 163 struct ata_device *dev; 164 unsigned long flags, now; 165 unsigned int uninitialized_var(msecs); 166 int rc = 0; 167 168 ap = ata_shost_to_port(sdev->host); 169 170 spin_lock_irqsave(ap->lock, flags); 171 dev = ata_scsi_find_dev(ap, sdev); 172 if (!dev) { 173 rc = -ENODEV; 174 goto unlock; 175 } 176 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 177 rc = -EOPNOTSUPP; 178 goto unlock; 179 } 180 181 link = dev->link; 182 now = jiffies; 183 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 184 link->eh_context.unloaded_mask & (1 << dev->devno) && 185 time_after(dev->unpark_deadline, now)) 186 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 187 else 188 msecs = 0; 189 190 unlock: 191 spin_unlock_irq(ap->lock); 192 193 return rc ? rc : snprintf(buf, 20, "%u\n", msecs); 194 } 195 196 static ssize_t ata_scsi_park_store(struct device *device, 197 struct device_attribute *attr, 198 const char *buf, size_t len) 199 { 200 struct scsi_device *sdev = to_scsi_device(device); 201 struct ata_port *ap; 202 struct ata_device *dev; 203 long int input; 204 unsigned long flags; 205 int rc; 206 207 rc = strict_strtol(buf, 10, &input); 208 if (rc || input < -2) 209 return -EINVAL; 210 if (input > ATA_TMOUT_MAX_PARK) { 211 rc = -EOVERFLOW; 212 input = ATA_TMOUT_MAX_PARK; 213 } 214 215 ap = ata_shost_to_port(sdev->host); 216 217 spin_lock_irqsave(ap->lock, flags); 218 dev = ata_scsi_find_dev(ap, sdev); 219 if (unlikely(!dev)) { 220 rc = -ENODEV; 221 goto unlock; 222 } 223 if (dev->class != ATA_DEV_ATA) { 224 rc = -EOPNOTSUPP; 225 goto unlock; 226 } 227 228 if (input >= 0) { 229 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 230 rc = -EOPNOTSUPP; 231 goto unlock; 232 } 233 234 dev->unpark_deadline = ata_deadline(jiffies, input); 235 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 236 ata_port_schedule_eh(ap); 237 complete(&ap->park_req_pending); 238 } else { 239 switch (input) { 240 case -1: 241 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 242 break; 243 case -2: 244 dev->flags |= ATA_DFLAG_NO_UNLOAD; 245 break; 246 } 247 } 248 unlock: 249 spin_unlock_irqrestore(ap->lock, flags); 250 251 return rc ? rc : len; 252 } 253 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 254 ata_scsi_park_show, ata_scsi_park_store); 255 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 256 257 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) 258 { 259 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 260 261 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq); 262 } 263 264 static ssize_t 265 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, 266 const char *buf, size_t count) 267 { 268 struct Scsi_Host *shost = class_to_shost(dev); 269 struct ata_port *ap = ata_shost_to_port(shost); 270 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) 271 return ap->ops->em_store(ap, buf, count); 272 return -EINVAL; 273 } 274 275 static ssize_t 276 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, 277 char *buf) 278 { 279 struct Scsi_Host *shost = class_to_shost(dev); 280 struct ata_port *ap = ata_shost_to_port(shost); 281 282 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) 283 return ap->ops->em_show(ap, buf); 284 return -EINVAL; 285 } 286 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, 287 ata_scsi_em_message_show, ata_scsi_em_message_store); 288 EXPORT_SYMBOL_GPL(dev_attr_em_message); 289 290 static ssize_t 291 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, 292 char *buf) 293 { 294 struct Scsi_Host *shost = class_to_shost(dev); 295 struct ata_port *ap = ata_shost_to_port(shost); 296 297 return snprintf(buf, 23, "%d\n", ap->em_message_type); 298 } 299 DEVICE_ATTR(em_message_type, S_IRUGO, 300 ata_scsi_em_message_type_show, NULL); 301 EXPORT_SYMBOL_GPL(dev_attr_em_message_type); 302 303 static ssize_t 304 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, 305 char *buf) 306 { 307 struct scsi_device *sdev = to_scsi_device(dev); 308 struct ata_port *ap = ata_shost_to_port(sdev->host); 309 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 310 311 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY)) 312 return ap->ops->sw_activity_show(atadev, buf); 313 return -EINVAL; 314 } 315 316 static ssize_t 317 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, 318 const char *buf, size_t count) 319 { 320 struct scsi_device *sdev = to_scsi_device(dev); 321 struct ata_port *ap = ata_shost_to_port(sdev->host); 322 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 323 enum sw_activity val; 324 int rc; 325 326 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) { 327 val = simple_strtoul(buf, NULL, 0); 328 switch (val) { 329 case OFF: case BLINK_ON: case BLINK_OFF: 330 rc = ap->ops->sw_activity_store(atadev, val); 331 if (!rc) 332 return count; 333 else 334 return rc; 335 } 336 } 337 return -EINVAL; 338 } 339 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, 340 ata_scsi_activity_store); 341 EXPORT_SYMBOL_GPL(dev_attr_sw_activity); 342 343 struct device_attribute *ata_common_sdev_attrs[] = { 344 &dev_attr_unload_heads, 345 NULL 346 }; 347 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); 348 349 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd) 350 { 351 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); 352 /* "Invalid field in cbd" */ 353 cmd->scsi_done(cmd); 354 } 355 356 /** 357 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 358 * @sdev: SCSI device for which BIOS geometry is to be determined 359 * @bdev: block device associated with @sdev 360 * @capacity: capacity of SCSI device 361 * @geom: location to which geometry will be output 362 * 363 * Generic bios head/sector/cylinder calculator 364 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 365 * mapping. Some situations may arise where the disk is not 366 * bootable if this is not used. 367 * 368 * LOCKING: 369 * Defined by the SCSI layer. We don't really care. 370 * 371 * RETURNS: 372 * Zero. 373 */ 374 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 375 sector_t capacity, int geom[]) 376 { 377 geom[0] = 255; 378 geom[1] = 63; 379 sector_div(capacity, 255*63); 380 geom[2] = capacity; 381 382 return 0; 383 } 384 385 /** 386 * ata_scsi_unlock_native_capacity - unlock native capacity 387 * @sdev: SCSI device to adjust device capacity for 388 * 389 * This function is called if a partition on @sdev extends beyond 390 * the end of the device. It requests EH to unlock HPA. 391 * 392 * LOCKING: 393 * Defined by the SCSI layer. Might sleep. 394 */ 395 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 396 { 397 struct ata_port *ap = ata_shost_to_port(sdev->host); 398 struct ata_device *dev; 399 unsigned long flags; 400 401 spin_lock_irqsave(ap->lock, flags); 402 403 dev = ata_scsi_find_dev(ap, sdev); 404 if (dev && dev->n_sectors < dev->n_native_sectors) { 405 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 406 dev->link->eh_info.action |= ATA_EH_RESET; 407 ata_port_schedule_eh(ap); 408 } 409 410 spin_unlock_irqrestore(ap->lock, flags); 411 ata_port_wait_eh(ap); 412 } 413 414 /** 415 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 416 * @ap: target port 417 * @sdev: SCSI device to get identify data for 418 * @arg: User buffer area for identify data 419 * 420 * LOCKING: 421 * Defined by the SCSI layer. We don't really care. 422 * 423 * RETURNS: 424 * Zero on success, negative errno on error. 425 */ 426 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 427 void __user *arg) 428 { 429 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 430 u16 __user *dst = arg; 431 char buf[40]; 432 433 if (!dev) 434 return -ENOMSG; 435 436 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 437 return -EFAULT; 438 439 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 440 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 441 return -EFAULT; 442 443 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 444 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 445 return -EFAULT; 446 447 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 448 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 449 return -EFAULT; 450 451 return 0; 452 } 453 454 /** 455 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 456 * @scsidev: Device to which we are issuing command 457 * @arg: User provided data for issuing command 458 * 459 * LOCKING: 460 * Defined by the SCSI layer. We don't really care. 461 * 462 * RETURNS: 463 * Zero on success, negative errno on error. 464 */ 465 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 466 { 467 int rc = 0; 468 u8 scsi_cmd[MAX_COMMAND_SIZE]; 469 u8 args[4], *argbuf = NULL, *sensebuf = NULL; 470 int argsize = 0; 471 enum dma_data_direction data_dir; 472 int cmd_result; 473 474 if (arg == NULL) 475 return -EINVAL; 476 477 if (copy_from_user(args, arg, sizeof(args))) 478 return -EFAULT; 479 480 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 481 if (!sensebuf) 482 return -ENOMEM; 483 484 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 485 486 if (args[3]) { 487 argsize = ATA_SECT_SIZE * args[3]; 488 argbuf = kmalloc(argsize, GFP_KERNEL); 489 if (argbuf == NULL) { 490 rc = -ENOMEM; 491 goto error; 492 } 493 494 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 495 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 496 block count in sector count field */ 497 data_dir = DMA_FROM_DEVICE; 498 } else { 499 scsi_cmd[1] = (3 << 1); /* Non-data */ 500 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 501 data_dir = DMA_NONE; 502 } 503 504 scsi_cmd[0] = ATA_16; 505 506 scsi_cmd[4] = args[2]; 507 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 508 scsi_cmd[6] = args[3]; 509 scsi_cmd[8] = args[1]; 510 scsi_cmd[10] = 0x4f; 511 scsi_cmd[12] = 0xc2; 512 } else { 513 scsi_cmd[6] = args[1]; 514 } 515 scsi_cmd[14] = args[0]; 516 517 /* Good values for timeout and retries? Values below 518 from scsi_ioctl_send_command() for default case... */ 519 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 520 sensebuf, (10*HZ), 5, 0, NULL); 521 522 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 523 u8 *desc = sensebuf + 8; 524 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 525 526 /* If we set cc then ATA pass-through will cause a 527 * check condition even if no error. Filter that. */ 528 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 529 struct scsi_sense_hdr sshdr; 530 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 531 &sshdr); 532 if (sshdr.sense_key == 0 && 533 sshdr.asc == 0 && sshdr.ascq == 0) 534 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 535 } 536 537 /* Send userspace a few ATA registers (same as drivers/ide) */ 538 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 539 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 540 args[0] = desc[13]; /* status */ 541 args[1] = desc[3]; /* error */ 542 args[2] = desc[5]; /* sector count (0:7) */ 543 if (copy_to_user(arg, args, sizeof(args))) 544 rc = -EFAULT; 545 } 546 } 547 548 549 if (cmd_result) { 550 rc = -EIO; 551 goto error; 552 } 553 554 if ((argbuf) 555 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 556 rc = -EFAULT; 557 error: 558 kfree(sensebuf); 559 kfree(argbuf); 560 return rc; 561 } 562 563 /** 564 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 565 * @scsidev: Device to which we are issuing command 566 * @arg: User provided data for issuing command 567 * 568 * LOCKING: 569 * Defined by the SCSI layer. We don't really care. 570 * 571 * RETURNS: 572 * Zero on success, negative errno on error. 573 */ 574 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 575 { 576 int rc = 0; 577 u8 scsi_cmd[MAX_COMMAND_SIZE]; 578 u8 args[7], *sensebuf = NULL; 579 int cmd_result; 580 581 if (arg == NULL) 582 return -EINVAL; 583 584 if (copy_from_user(args, arg, sizeof(args))) 585 return -EFAULT; 586 587 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 588 if (!sensebuf) 589 return -ENOMEM; 590 591 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 592 scsi_cmd[0] = ATA_16; 593 scsi_cmd[1] = (3 << 1); /* Non-data */ 594 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 595 scsi_cmd[4] = args[1]; 596 scsi_cmd[6] = args[2]; 597 scsi_cmd[8] = args[3]; 598 scsi_cmd[10] = args[4]; 599 scsi_cmd[12] = args[5]; 600 scsi_cmd[13] = args[6] & 0x4f; 601 scsi_cmd[14] = args[0]; 602 603 /* Good values for timeout and retries? Values below 604 from scsi_ioctl_send_command() for default case... */ 605 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 606 sensebuf, (10*HZ), 5, 0, NULL); 607 608 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 609 u8 *desc = sensebuf + 8; 610 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 611 612 /* If we set cc then ATA pass-through will cause a 613 * check condition even if no error. Filter that. */ 614 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 615 struct scsi_sense_hdr sshdr; 616 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 617 &sshdr); 618 if (sshdr.sense_key == 0 && 619 sshdr.asc == 0 && sshdr.ascq == 0) 620 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 621 } 622 623 /* Send userspace ATA registers */ 624 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 625 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 626 args[0] = desc[13]; /* status */ 627 args[1] = desc[3]; /* error */ 628 args[2] = desc[5]; /* sector count (0:7) */ 629 args[3] = desc[7]; /* lbal */ 630 args[4] = desc[9]; /* lbam */ 631 args[5] = desc[11]; /* lbah */ 632 args[6] = desc[12]; /* select */ 633 if (copy_to_user(arg, args, sizeof(args))) 634 rc = -EFAULT; 635 } 636 } 637 638 if (cmd_result) { 639 rc = -EIO; 640 goto error; 641 } 642 643 error: 644 kfree(sensebuf); 645 return rc; 646 } 647 648 static int ata_ioc32(struct ata_port *ap) 649 { 650 if (ap->flags & ATA_FLAG_PIO_DMA) 651 return 1; 652 if (ap->pflags & ATA_PFLAG_PIO32) 653 return 1; 654 return 0; 655 } 656 657 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 658 int cmd, void __user *arg) 659 { 660 int val = -EINVAL, rc = -EINVAL; 661 unsigned long flags; 662 663 switch (cmd) { 664 case ATA_IOC_GET_IO32: 665 spin_lock_irqsave(ap->lock, flags); 666 val = ata_ioc32(ap); 667 spin_unlock_irqrestore(ap->lock, flags); 668 if (copy_to_user(arg, &val, 1)) 669 return -EFAULT; 670 return 0; 671 672 case ATA_IOC_SET_IO32: 673 val = (unsigned long) arg; 674 rc = 0; 675 spin_lock_irqsave(ap->lock, flags); 676 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 677 if (val) 678 ap->pflags |= ATA_PFLAG_PIO32; 679 else 680 ap->pflags &= ~ATA_PFLAG_PIO32; 681 } else { 682 if (val != ata_ioc32(ap)) 683 rc = -EINVAL; 684 } 685 spin_unlock_irqrestore(ap->lock, flags); 686 return rc; 687 688 case HDIO_GET_IDENTITY: 689 return ata_get_identity(ap, scsidev, arg); 690 691 case HDIO_DRIVE_CMD: 692 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 693 return -EACCES; 694 return ata_cmd_ioctl(scsidev, arg); 695 696 case HDIO_DRIVE_TASK: 697 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 698 return -EACCES; 699 return ata_task_ioctl(scsidev, arg); 700 701 default: 702 rc = -ENOTTY; 703 break; 704 } 705 706 return rc; 707 } 708 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 709 710 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) 711 { 712 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 713 scsidev, cmd, arg); 714 } 715 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 716 717 /** 718 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 719 * @dev: ATA device to which the new command is attached 720 * @cmd: SCSI command that originated this ATA command 721 * 722 * Obtain a reference to an unused ata_queued_cmd structure, 723 * which is the basic libata structure representing a single 724 * ATA command sent to the hardware. 725 * 726 * If a command was available, fill in the SCSI-specific 727 * portions of the structure with information on the 728 * current command. 729 * 730 * LOCKING: 731 * spin_lock_irqsave(host lock) 732 * 733 * RETURNS: 734 * Command allocated, or %NULL if none available. 735 */ 736 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 737 struct scsi_cmnd *cmd) 738 { 739 struct ata_queued_cmd *qc; 740 741 qc = ata_qc_new_init(dev); 742 if (qc) { 743 qc->scsicmd = cmd; 744 qc->scsidone = cmd->scsi_done; 745 746 qc->sg = scsi_sglist(cmd); 747 qc->n_elem = scsi_sg_count(cmd); 748 } else { 749 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 750 cmd->scsi_done(cmd); 751 } 752 753 return qc; 754 } 755 756 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 757 { 758 struct scsi_cmnd *scmd = qc->scsicmd; 759 760 qc->extrabytes = scmd->request->extra_len; 761 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 762 } 763 764 /** 765 * ata_dump_status - user friendly display of error info 766 * @id: id of the port in question 767 * @tf: ptr to filled out taskfile 768 * 769 * Decode and dump the ATA error/status registers for the user so 770 * that they have some idea what really happened at the non 771 * make-believe layer. 772 * 773 * LOCKING: 774 * inherited from caller 775 */ 776 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 777 { 778 u8 stat = tf->command, err = tf->feature; 779 780 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); 781 if (stat & ATA_BUSY) { 782 printk("Busy }\n"); /* Data is not valid in this case */ 783 } else { 784 if (stat & 0x40) printk("DriveReady "); 785 if (stat & 0x20) printk("DeviceFault "); 786 if (stat & 0x10) printk("SeekComplete "); 787 if (stat & 0x08) printk("DataRequest "); 788 if (stat & 0x04) printk("CorrectedError "); 789 if (stat & 0x02) printk("Index "); 790 if (stat & 0x01) printk("Error "); 791 printk("}\n"); 792 793 if (err) { 794 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); 795 if (err & 0x04) printk("DriveStatusError "); 796 if (err & 0x80) { 797 if (err & 0x04) printk("BadCRC "); 798 else printk("Sector "); 799 } 800 if (err & 0x40) printk("UncorrectableError "); 801 if (err & 0x10) printk("SectorIdNotFound "); 802 if (err & 0x02) printk("TrackZeroNotFound "); 803 if (err & 0x01) printk("AddrMarkNotFound "); 804 printk("}\n"); 805 } 806 } 807 } 808 809 /** 810 * ata_to_sense_error - convert ATA error to SCSI error 811 * @id: ATA device number 812 * @drv_stat: value contained in ATA status register 813 * @drv_err: value contained in ATA error register 814 * @sk: the sense key we'll fill out 815 * @asc: the additional sense code we'll fill out 816 * @ascq: the additional sense code qualifier we'll fill out 817 * @verbose: be verbose 818 * 819 * Converts an ATA error into a SCSI error. Fill out pointers to 820 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 821 * format sense blocks. 822 * 823 * LOCKING: 824 * spin_lock_irqsave(host lock) 825 */ 826 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 827 u8 *asc, u8 *ascq, int verbose) 828 { 829 int i; 830 831 /* Based on the 3ware driver translation table */ 832 static const unsigned char sense_table[][4] = { 833 /* BBD|ECC|ID|MAR */ 834 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command 835 /* BBD|ECC|ID */ 836 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command 837 /* ECC|MC|MARK */ 838 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error 839 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 840 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error 841 /* MC|ID|ABRT|TRK0|MARK */ 842 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready 843 /* MCR|MARK */ 844 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready 845 /* Bad address mark */ 846 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field 847 /* TRK0 */ 848 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error 849 /* Abort & !ICRC */ 850 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command 851 /* Media change request */ 852 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline 853 /* SRV */ 854 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found 855 /* Media change */ 856 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline 857 /* ECC */ 858 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error 859 /* BBD - block marked bad */ 860 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error 861 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 862 }; 863 static const unsigned char stat_table[][4] = { 864 /* Must be first because BUSY means no other bits valid */ 865 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now 866 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault 867 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now 868 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered 869 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 870 }; 871 872 /* 873 * Is this an error we can process/parse 874 */ 875 if (drv_stat & ATA_BUSY) { 876 drv_err = 0; /* Ignore the err bits, they're invalid */ 877 } 878 879 if (drv_err) { 880 /* Look for drv_err */ 881 for (i = 0; sense_table[i][0] != 0xFF; i++) { 882 /* Look for best matches first */ 883 if ((sense_table[i][0] & drv_err) == 884 sense_table[i][0]) { 885 *sk = sense_table[i][1]; 886 *asc = sense_table[i][2]; 887 *ascq = sense_table[i][3]; 888 goto translate_done; 889 } 890 } 891 /* No immediate match */ 892 if (verbose) 893 printk(KERN_WARNING "ata%u: no sense translation for " 894 "error 0x%02x\n", id, drv_err); 895 } 896 897 /* Fall back to interpreting status bits */ 898 for (i = 0; stat_table[i][0] != 0xFF; i++) { 899 if (stat_table[i][0] & drv_stat) { 900 *sk = stat_table[i][1]; 901 *asc = stat_table[i][2]; 902 *ascq = stat_table[i][3]; 903 goto translate_done; 904 } 905 } 906 /* No error? Undecoded? */ 907 if (verbose) 908 printk(KERN_WARNING "ata%u: no sense translation for " 909 "status: 0x%02x\n", id, drv_stat); 910 911 /* We need a sensible error return here, which is tricky, and one 912 that won't cause people to do things like return a disk wrongly */ 913 *sk = ABORTED_COMMAND; 914 *asc = 0x00; 915 *ascq = 0x00; 916 917 translate_done: 918 if (verbose) 919 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " 920 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 921 id, drv_stat, drv_err, *sk, *asc, *ascq); 922 return; 923 } 924 925 /* 926 * ata_gen_passthru_sense - Generate check condition sense block. 927 * @qc: Command that completed. 928 * 929 * This function is specific to the ATA descriptor format sense 930 * block specified for the ATA pass through commands. Regardless 931 * of whether the command errored or not, return a sense 932 * block. Copy all controller registers into the sense 933 * block. Clear sense key, ASC & ASCQ if there is no error. 934 * 935 * LOCKING: 936 * None. 937 */ 938 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 939 { 940 struct scsi_cmnd *cmd = qc->scsicmd; 941 struct ata_taskfile *tf = &qc->result_tf; 942 unsigned char *sb = cmd->sense_buffer; 943 unsigned char *desc = sb + 8; 944 int verbose = qc->ap->ops->error_handler == NULL; 945 946 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 947 948 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 949 950 /* 951 * Use ata_to_sense_error() to map status register bits 952 * onto sense key, asc & ascq. 953 */ 954 if (qc->err_mask || 955 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 956 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 957 &sb[1], &sb[2], &sb[3], verbose); 958 sb[1] &= 0x0f; 959 } 960 961 /* 962 * Sense data is current and format is descriptor. 963 */ 964 sb[0] = 0x72; 965 966 desc[0] = 0x09; 967 968 /* set length of additional sense data */ 969 sb[7] = 14; 970 desc[1] = 12; 971 972 /* 973 * Copy registers into sense buffer. 974 */ 975 desc[2] = 0x00; 976 desc[3] = tf->feature; /* == error reg */ 977 desc[5] = tf->nsect; 978 desc[7] = tf->lbal; 979 desc[9] = tf->lbam; 980 desc[11] = tf->lbah; 981 desc[12] = tf->device; 982 desc[13] = tf->command; /* == status reg */ 983 984 /* 985 * Fill in Extend bit, and the high order bytes 986 * if applicable. 987 */ 988 if (tf->flags & ATA_TFLAG_LBA48) { 989 desc[2] |= 0x01; 990 desc[4] = tf->hob_nsect; 991 desc[6] = tf->hob_lbal; 992 desc[8] = tf->hob_lbam; 993 desc[10] = tf->hob_lbah; 994 } 995 } 996 997 /** 998 * ata_gen_ata_sense - generate a SCSI fixed sense block 999 * @qc: Command that we are erroring out 1000 * 1001 * Generate sense block for a failed ATA command @qc. Descriptor 1002 * format is used to accomodate LBA48 block address. 1003 * 1004 * LOCKING: 1005 * None. 1006 */ 1007 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 1008 { 1009 struct ata_device *dev = qc->dev; 1010 struct scsi_cmnd *cmd = qc->scsicmd; 1011 struct ata_taskfile *tf = &qc->result_tf; 1012 unsigned char *sb = cmd->sense_buffer; 1013 unsigned char *desc = sb + 8; 1014 int verbose = qc->ap->ops->error_handler == NULL; 1015 u64 block; 1016 1017 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1018 1019 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1020 1021 /* sense data is current and format is descriptor */ 1022 sb[0] = 0x72; 1023 1024 /* Use ata_to_sense_error() to map status register bits 1025 * onto sense key, asc & ascq. 1026 */ 1027 if (qc->err_mask || 1028 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1029 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1030 &sb[1], &sb[2], &sb[3], verbose); 1031 sb[1] &= 0x0f; 1032 } 1033 1034 block = ata_tf_read_block(&qc->result_tf, dev); 1035 1036 /* information sense data descriptor */ 1037 sb[7] = 12; 1038 desc[0] = 0x00; 1039 desc[1] = 10; 1040 1041 desc[2] |= 0x80; /* valid */ 1042 desc[6] = block >> 40; 1043 desc[7] = block >> 32; 1044 desc[8] = block >> 24; 1045 desc[9] = block >> 16; 1046 desc[10] = block >> 8; 1047 desc[11] = block; 1048 } 1049 1050 static void ata_scsi_sdev_config(struct scsi_device *sdev) 1051 { 1052 sdev->use_10_for_rw = 1; 1053 sdev->use_10_for_ms = 1; 1054 1055 /* Schedule policy is determined by ->qc_defer() callback and 1056 * it needs to see every deferred qc. Set dev_blocked to 1 to 1057 * prevent SCSI midlayer from automatically deferring 1058 * requests. 1059 */ 1060 sdev->max_device_blocked = 1; 1061 } 1062 1063 /** 1064 * atapi_drain_needed - Check whether data transfer may overflow 1065 * @rq: request to be checked 1066 * 1067 * ATAPI commands which transfer variable length data to host 1068 * might overflow due to application error or hardare bug. This 1069 * function checks whether overflow should be drained and ignored 1070 * for @request. 1071 * 1072 * LOCKING: 1073 * None. 1074 * 1075 * RETURNS: 1076 * 1 if ; otherwise, 0. 1077 */ 1078 static int atapi_drain_needed(struct request *rq) 1079 { 1080 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC)) 1081 return 0; 1082 1083 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE)) 1084 return 0; 1085 1086 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; 1087 } 1088 1089 static int ata_scsi_dev_config(struct scsi_device *sdev, 1090 struct ata_device *dev) 1091 { 1092 if (!ata_id_has_unload(dev->id)) 1093 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1094 1095 /* configure max sectors */ 1096 blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors); 1097 1098 if (dev->class == ATA_DEV_ATAPI) { 1099 struct request_queue *q = sdev->request_queue; 1100 void *buf; 1101 1102 sdev->sector_size = ATA_SECT_SIZE; 1103 1104 /* set DMA padding */ 1105 blk_queue_update_dma_pad(sdev->request_queue, 1106 ATA_DMA_PAD_SZ - 1); 1107 1108 /* configure draining */ 1109 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1110 if (!buf) { 1111 ata_dev_printk(dev, KERN_ERR, 1112 "drain buffer allocation failed\n"); 1113 return -ENOMEM; 1114 } 1115 1116 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1117 } else { 1118 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1119 sdev->manage_start_stop = 1; 1120 } 1121 1122 /* 1123 * ata_pio_sectors() expects buffer for each sector to not cross 1124 * page boundary. Enforce it by requiring buffers to be sector 1125 * aligned, which works iff sector_size is not larger than 1126 * PAGE_SIZE. ATAPI devices also need the alignment as 1127 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1128 */ 1129 if (sdev->sector_size > PAGE_SIZE) 1130 ata_dev_printk(dev, KERN_WARNING, 1131 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1132 sdev->sector_size); 1133 1134 blk_queue_update_dma_alignment(sdev->request_queue, 1135 sdev->sector_size - 1); 1136 1137 if (dev->flags & ATA_DFLAG_AN) 1138 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1139 1140 if (dev->flags & ATA_DFLAG_NCQ) { 1141 int depth; 1142 1143 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1144 depth = min(ATA_MAX_QUEUE - 1, depth); 1145 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); 1146 } 1147 1148 dev->sdev = sdev; 1149 return 0; 1150 } 1151 1152 /** 1153 * ata_scsi_slave_config - Set SCSI device attributes 1154 * @sdev: SCSI device to examine 1155 * 1156 * This is called before we actually start reading 1157 * and writing to the device, to configure certain 1158 * SCSI mid-layer behaviors. 1159 * 1160 * LOCKING: 1161 * Defined by SCSI layer. We don't really care. 1162 */ 1163 1164 int ata_scsi_slave_config(struct scsi_device *sdev) 1165 { 1166 struct ata_port *ap = ata_shost_to_port(sdev->host); 1167 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1168 int rc = 0; 1169 1170 ata_scsi_sdev_config(sdev); 1171 1172 if (dev) 1173 rc = ata_scsi_dev_config(sdev, dev); 1174 1175 return rc; 1176 } 1177 1178 /** 1179 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1180 * @sdev: SCSI device to be destroyed 1181 * 1182 * @sdev is about to be destroyed for hot/warm unplugging. If 1183 * this unplugging was initiated by libata as indicated by NULL 1184 * dev->sdev, this function doesn't have to do anything. 1185 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1186 * Clear dev->sdev, schedule the device for ATA detach and invoke 1187 * EH. 1188 * 1189 * LOCKING: 1190 * Defined by SCSI layer. We don't really care. 1191 */ 1192 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1193 { 1194 struct ata_port *ap = ata_shost_to_port(sdev->host); 1195 struct request_queue *q = sdev->request_queue; 1196 unsigned long flags; 1197 struct ata_device *dev; 1198 1199 if (!ap->ops->error_handler) 1200 return; 1201 1202 spin_lock_irqsave(ap->lock, flags); 1203 dev = __ata_scsi_find_dev(ap, sdev); 1204 if (dev && dev->sdev) { 1205 /* SCSI device already in CANCEL state, no need to offline it */ 1206 dev->sdev = NULL; 1207 dev->flags |= ATA_DFLAG_DETACH; 1208 ata_port_schedule_eh(ap); 1209 } 1210 spin_unlock_irqrestore(ap->lock, flags); 1211 1212 kfree(q->dma_drain_buffer); 1213 q->dma_drain_buffer = NULL; 1214 q->dma_drain_size = 0; 1215 } 1216 1217 /** 1218 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1219 * @sdev: SCSI device to configure queue depth for 1220 * @queue_depth: new queue depth 1221 * @reason: calling context 1222 * 1223 * This is libata standard hostt->change_queue_depth callback. 1224 * SCSI will call into this callback when user tries to set queue 1225 * depth via sysfs. 1226 * 1227 * LOCKING: 1228 * SCSI layer (we don't care) 1229 * 1230 * RETURNS: 1231 * Newly configured queue depth. 1232 */ 1233 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth, 1234 int reason) 1235 { 1236 struct ata_port *ap = ata_shost_to_port(sdev->host); 1237 struct ata_device *dev; 1238 unsigned long flags; 1239 1240 if (reason != SCSI_QDEPTH_DEFAULT) 1241 return -EOPNOTSUPP; 1242 1243 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1244 return sdev->queue_depth; 1245 1246 dev = ata_scsi_find_dev(ap, sdev); 1247 if (!dev || !ata_dev_enabled(dev)) 1248 return sdev->queue_depth; 1249 1250 /* NCQ enabled? */ 1251 spin_lock_irqsave(ap->lock, flags); 1252 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1253 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1254 dev->flags |= ATA_DFLAG_NCQ_OFF; 1255 queue_depth = 1; 1256 } 1257 spin_unlock_irqrestore(ap->lock, flags); 1258 1259 /* limit and apply queue depth */ 1260 queue_depth = min(queue_depth, sdev->host->can_queue); 1261 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1262 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); 1263 1264 if (sdev->queue_depth == queue_depth) 1265 return -EINVAL; 1266 1267 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); 1268 return queue_depth; 1269 } 1270 1271 /** 1272 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1273 * @qc: Storage for translated ATA taskfile 1274 * 1275 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1276 * (to start). Perhaps these commands should be preceded by 1277 * CHECK POWER MODE to see what power mode the device is already in. 1278 * [See SAT revision 5 at www.t10.org] 1279 * 1280 * LOCKING: 1281 * spin_lock_irqsave(host lock) 1282 * 1283 * RETURNS: 1284 * Zero on success, non-zero on error. 1285 */ 1286 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1287 { 1288 struct scsi_cmnd *scmd = qc->scsicmd; 1289 struct ata_taskfile *tf = &qc->tf; 1290 const u8 *cdb = scmd->cmnd; 1291 1292 if (scmd->cmd_len < 5) 1293 goto invalid_fld; 1294 1295 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1296 tf->protocol = ATA_PROT_NODATA; 1297 if (cdb[1] & 0x1) { 1298 ; /* ignore IMMED bit, violates sat-r05 */ 1299 } 1300 if (cdb[4] & 0x2) 1301 goto invalid_fld; /* LOEJ bit set not supported */ 1302 if (((cdb[4] >> 4) & 0xf) != 0) 1303 goto invalid_fld; /* power conditions not supported */ 1304 1305 if (cdb[4] & 0x1) { 1306 tf->nsect = 1; /* 1 sector, lba=0 */ 1307 1308 if (qc->dev->flags & ATA_DFLAG_LBA) { 1309 tf->flags |= ATA_TFLAG_LBA; 1310 1311 tf->lbah = 0x0; 1312 tf->lbam = 0x0; 1313 tf->lbal = 0x0; 1314 tf->device |= ATA_LBA; 1315 } else { 1316 /* CHS */ 1317 tf->lbal = 0x1; /* sect */ 1318 tf->lbam = 0x0; /* cyl low */ 1319 tf->lbah = 0x0; /* cyl high */ 1320 } 1321 1322 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1323 } else { 1324 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1325 * or S5) causing some drives to spin up and down again. 1326 */ 1327 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1328 system_state == SYSTEM_POWER_OFF) 1329 goto skip; 1330 1331 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1332 system_entering_hibernation()) 1333 goto skip; 1334 1335 /* Issue ATA STANDBY IMMEDIATE command */ 1336 tf->command = ATA_CMD_STANDBYNOW1; 1337 } 1338 1339 /* 1340 * Standby and Idle condition timers could be implemented but that 1341 * would require libata to implement the Power condition mode page 1342 * and allow the user to change it. Changing mode pages requires 1343 * MODE SELECT to be implemented. 1344 */ 1345 1346 return 0; 1347 1348 invalid_fld: 1349 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1350 /* "Invalid field in cbd" */ 1351 return 1; 1352 skip: 1353 scmd->result = SAM_STAT_GOOD; 1354 return 1; 1355 } 1356 1357 1358 /** 1359 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1360 * @qc: Storage for translated ATA taskfile 1361 * 1362 * Sets up an ATA taskfile to issue FLUSH CACHE or 1363 * FLUSH CACHE EXT. 1364 * 1365 * LOCKING: 1366 * spin_lock_irqsave(host lock) 1367 * 1368 * RETURNS: 1369 * Zero on success, non-zero on error. 1370 */ 1371 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1372 { 1373 struct ata_taskfile *tf = &qc->tf; 1374 1375 tf->flags |= ATA_TFLAG_DEVICE; 1376 tf->protocol = ATA_PROT_NODATA; 1377 1378 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1379 tf->command = ATA_CMD_FLUSH_EXT; 1380 else 1381 tf->command = ATA_CMD_FLUSH; 1382 1383 /* flush is critical for IO integrity, consider it an IO command */ 1384 qc->flags |= ATA_QCFLAG_IO; 1385 1386 return 0; 1387 } 1388 1389 /** 1390 * scsi_6_lba_len - Get LBA and transfer length 1391 * @cdb: SCSI command to translate 1392 * 1393 * Calculate LBA and transfer length for 6-byte commands. 1394 * 1395 * RETURNS: 1396 * @plba: the LBA 1397 * @plen: the transfer length 1398 */ 1399 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1400 { 1401 u64 lba = 0; 1402 u32 len; 1403 1404 VPRINTK("six-byte command\n"); 1405 1406 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1407 lba |= ((u64)cdb[2]) << 8; 1408 lba |= ((u64)cdb[3]); 1409 1410 len = cdb[4]; 1411 1412 *plba = lba; 1413 *plen = len; 1414 } 1415 1416 /** 1417 * scsi_10_lba_len - Get LBA and transfer length 1418 * @cdb: SCSI command to translate 1419 * 1420 * Calculate LBA and transfer length for 10-byte commands. 1421 * 1422 * RETURNS: 1423 * @plba: the LBA 1424 * @plen: the transfer length 1425 */ 1426 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1427 { 1428 u64 lba = 0; 1429 u32 len = 0; 1430 1431 VPRINTK("ten-byte command\n"); 1432 1433 lba |= ((u64)cdb[2]) << 24; 1434 lba |= ((u64)cdb[3]) << 16; 1435 lba |= ((u64)cdb[4]) << 8; 1436 lba |= ((u64)cdb[5]); 1437 1438 len |= ((u32)cdb[7]) << 8; 1439 len |= ((u32)cdb[8]); 1440 1441 *plba = lba; 1442 *plen = len; 1443 } 1444 1445 /** 1446 * scsi_16_lba_len - Get LBA and transfer length 1447 * @cdb: SCSI command to translate 1448 * 1449 * Calculate LBA and transfer length for 16-byte commands. 1450 * 1451 * RETURNS: 1452 * @plba: the LBA 1453 * @plen: the transfer length 1454 */ 1455 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1456 { 1457 u64 lba = 0; 1458 u32 len = 0; 1459 1460 VPRINTK("sixteen-byte command\n"); 1461 1462 lba |= ((u64)cdb[2]) << 56; 1463 lba |= ((u64)cdb[3]) << 48; 1464 lba |= ((u64)cdb[4]) << 40; 1465 lba |= ((u64)cdb[5]) << 32; 1466 lba |= ((u64)cdb[6]) << 24; 1467 lba |= ((u64)cdb[7]) << 16; 1468 lba |= ((u64)cdb[8]) << 8; 1469 lba |= ((u64)cdb[9]); 1470 1471 len |= ((u32)cdb[10]) << 24; 1472 len |= ((u32)cdb[11]) << 16; 1473 len |= ((u32)cdb[12]) << 8; 1474 len |= ((u32)cdb[13]); 1475 1476 *plba = lba; 1477 *plen = len; 1478 } 1479 1480 /** 1481 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1482 * @qc: Storage for translated ATA taskfile 1483 * 1484 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1485 * 1486 * LOCKING: 1487 * spin_lock_irqsave(host lock) 1488 * 1489 * RETURNS: 1490 * Zero on success, non-zero on error. 1491 */ 1492 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1493 { 1494 struct scsi_cmnd *scmd = qc->scsicmd; 1495 struct ata_taskfile *tf = &qc->tf; 1496 struct ata_device *dev = qc->dev; 1497 u64 dev_sectors = qc->dev->n_sectors; 1498 const u8 *cdb = scmd->cmnd; 1499 u64 block; 1500 u32 n_block; 1501 1502 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1503 tf->protocol = ATA_PROT_NODATA; 1504 1505 if (cdb[0] == VERIFY) { 1506 if (scmd->cmd_len < 10) 1507 goto invalid_fld; 1508 scsi_10_lba_len(cdb, &block, &n_block); 1509 } else if (cdb[0] == VERIFY_16) { 1510 if (scmd->cmd_len < 16) 1511 goto invalid_fld; 1512 scsi_16_lba_len(cdb, &block, &n_block); 1513 } else 1514 goto invalid_fld; 1515 1516 if (!n_block) 1517 goto nothing_to_do; 1518 if (block >= dev_sectors) 1519 goto out_of_range; 1520 if ((block + n_block) > dev_sectors) 1521 goto out_of_range; 1522 1523 if (dev->flags & ATA_DFLAG_LBA) { 1524 tf->flags |= ATA_TFLAG_LBA; 1525 1526 if (lba_28_ok(block, n_block)) { 1527 /* use LBA28 */ 1528 tf->command = ATA_CMD_VERIFY; 1529 tf->device |= (block >> 24) & 0xf; 1530 } else if (lba_48_ok(block, n_block)) { 1531 if (!(dev->flags & ATA_DFLAG_LBA48)) 1532 goto out_of_range; 1533 1534 /* use LBA48 */ 1535 tf->flags |= ATA_TFLAG_LBA48; 1536 tf->command = ATA_CMD_VERIFY_EXT; 1537 1538 tf->hob_nsect = (n_block >> 8) & 0xff; 1539 1540 tf->hob_lbah = (block >> 40) & 0xff; 1541 tf->hob_lbam = (block >> 32) & 0xff; 1542 tf->hob_lbal = (block >> 24) & 0xff; 1543 } else 1544 /* request too large even for LBA48 */ 1545 goto out_of_range; 1546 1547 tf->nsect = n_block & 0xff; 1548 1549 tf->lbah = (block >> 16) & 0xff; 1550 tf->lbam = (block >> 8) & 0xff; 1551 tf->lbal = block & 0xff; 1552 1553 tf->device |= ATA_LBA; 1554 } else { 1555 /* CHS */ 1556 u32 sect, head, cyl, track; 1557 1558 if (!lba_28_ok(block, n_block)) 1559 goto out_of_range; 1560 1561 /* Convert LBA to CHS */ 1562 track = (u32)block / dev->sectors; 1563 cyl = track / dev->heads; 1564 head = track % dev->heads; 1565 sect = (u32)block % dev->sectors + 1; 1566 1567 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1568 (u32)block, track, cyl, head, sect); 1569 1570 /* Check whether the converted CHS can fit. 1571 Cylinder: 0-65535 1572 Head: 0-15 1573 Sector: 1-255*/ 1574 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1575 goto out_of_range; 1576 1577 tf->command = ATA_CMD_VERIFY; 1578 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1579 tf->lbal = sect; 1580 tf->lbam = cyl; 1581 tf->lbah = cyl >> 8; 1582 tf->device |= head; 1583 } 1584 1585 return 0; 1586 1587 invalid_fld: 1588 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1589 /* "Invalid field in cbd" */ 1590 return 1; 1591 1592 out_of_range: 1593 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1594 /* "Logical Block Address out of range" */ 1595 return 1; 1596 1597 nothing_to_do: 1598 scmd->result = SAM_STAT_GOOD; 1599 return 1; 1600 } 1601 1602 /** 1603 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1604 * @qc: Storage for translated ATA taskfile 1605 * 1606 * Converts any of six SCSI read/write commands into the 1607 * ATA counterpart, including starting sector (LBA), 1608 * sector count, and taking into account the device's LBA48 1609 * support. 1610 * 1611 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1612 * %WRITE_16 are currently supported. 1613 * 1614 * LOCKING: 1615 * spin_lock_irqsave(host lock) 1616 * 1617 * RETURNS: 1618 * Zero on success, non-zero on error. 1619 */ 1620 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1621 { 1622 struct scsi_cmnd *scmd = qc->scsicmd; 1623 const u8 *cdb = scmd->cmnd; 1624 unsigned int tf_flags = 0; 1625 u64 block; 1626 u32 n_block; 1627 int rc; 1628 1629 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1630 tf_flags |= ATA_TFLAG_WRITE; 1631 1632 /* Calculate the SCSI LBA, transfer length and FUA. */ 1633 switch (cdb[0]) { 1634 case READ_10: 1635 case WRITE_10: 1636 if (unlikely(scmd->cmd_len < 10)) 1637 goto invalid_fld; 1638 scsi_10_lba_len(cdb, &block, &n_block); 1639 if (unlikely(cdb[1] & (1 << 3))) 1640 tf_flags |= ATA_TFLAG_FUA; 1641 break; 1642 case READ_6: 1643 case WRITE_6: 1644 if (unlikely(scmd->cmd_len < 6)) 1645 goto invalid_fld; 1646 scsi_6_lba_len(cdb, &block, &n_block); 1647 1648 /* for 6-byte r/w commands, transfer length 0 1649 * means 256 blocks of data, not 0 block. 1650 */ 1651 if (!n_block) 1652 n_block = 256; 1653 break; 1654 case READ_16: 1655 case WRITE_16: 1656 if (unlikely(scmd->cmd_len < 16)) 1657 goto invalid_fld; 1658 scsi_16_lba_len(cdb, &block, &n_block); 1659 if (unlikely(cdb[1] & (1 << 3))) 1660 tf_flags |= ATA_TFLAG_FUA; 1661 break; 1662 default: 1663 DPRINTK("no-byte command\n"); 1664 goto invalid_fld; 1665 } 1666 1667 /* Check and compose ATA command */ 1668 if (!n_block) 1669 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1670 * length 0 means transfer 0 block of data. 1671 * However, for ATA R/W commands, sector count 0 means 1672 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1673 * 1674 * WARNING: one or two older ATA drives treat 0 as 0... 1675 */ 1676 goto nothing_to_do; 1677 1678 qc->flags |= ATA_QCFLAG_IO; 1679 qc->nbytes = n_block * scmd->device->sector_size; 1680 1681 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1682 qc->tag); 1683 if (likely(rc == 0)) 1684 return 0; 1685 1686 if (rc == -ERANGE) 1687 goto out_of_range; 1688 /* treat all other errors as -EINVAL, fall through */ 1689 invalid_fld: 1690 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1691 /* "Invalid field in cbd" */ 1692 return 1; 1693 1694 out_of_range: 1695 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1696 /* "Logical Block Address out of range" */ 1697 return 1; 1698 1699 nothing_to_do: 1700 scmd->result = SAM_STAT_GOOD; 1701 return 1; 1702 } 1703 1704 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1705 { 1706 struct ata_port *ap = qc->ap; 1707 struct scsi_cmnd *cmd = qc->scsicmd; 1708 u8 *cdb = cmd->cmnd; 1709 int need_sense = (qc->err_mask != 0); 1710 1711 /* For ATA pass thru (SAT) commands, generate a sense block if 1712 * user mandated it or if there's an error. Note that if we 1713 * generate because the user forced us to, a check condition 1714 * is generated and the ATA register values are returned 1715 * whether the command completed successfully or not. If there 1716 * was no error, SK, ASC and ASCQ will all be zero. 1717 */ 1718 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1719 ((cdb[2] & 0x20) || need_sense)) { 1720 ata_gen_passthru_sense(qc); 1721 } else { 1722 if (!need_sense) { 1723 cmd->result = SAM_STAT_GOOD; 1724 } else { 1725 /* TODO: decide which descriptor format to use 1726 * for 48b LBA devices and call that here 1727 * instead of the fixed desc, which is only 1728 * good for smaller LBA (and maybe CHS?) 1729 * devices. 1730 */ 1731 ata_gen_ata_sense(qc); 1732 } 1733 } 1734 1735 if (need_sense && !ap->ops->error_handler) 1736 ata_dump_status(ap->print_id, &qc->result_tf); 1737 1738 qc->scsidone(cmd); 1739 1740 ata_qc_free(qc); 1741 } 1742 1743 /** 1744 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1745 * @dev: ATA device to which the command is addressed 1746 * @cmd: SCSI command to execute 1747 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1748 * 1749 * Our ->queuecommand() function has decided that the SCSI 1750 * command issued can be directly translated into an ATA 1751 * command, rather than handled internally. 1752 * 1753 * This function sets up an ata_queued_cmd structure for the 1754 * SCSI command, and sends that ata_queued_cmd to the hardware. 1755 * 1756 * The xlat_func argument (actor) returns 0 if ready to execute 1757 * ATA command, else 1 to finish translation. If 1 is returned 1758 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1759 * to be set reflecting an error condition or clean (early) 1760 * termination. 1761 * 1762 * LOCKING: 1763 * spin_lock_irqsave(host lock) 1764 * 1765 * RETURNS: 1766 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1767 * needs to be deferred. 1768 */ 1769 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1770 ata_xlat_func_t xlat_func) 1771 { 1772 struct ata_port *ap = dev->link->ap; 1773 struct ata_queued_cmd *qc; 1774 int rc; 1775 1776 VPRINTK("ENTER\n"); 1777 1778 qc = ata_scsi_qc_new(dev, cmd); 1779 if (!qc) 1780 goto err_mem; 1781 1782 /* data is present; dma-map it */ 1783 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1784 cmd->sc_data_direction == DMA_TO_DEVICE) { 1785 if (unlikely(scsi_bufflen(cmd) < 1)) { 1786 ata_dev_printk(dev, KERN_WARNING, 1787 "WARNING: zero len r/w req\n"); 1788 goto err_did; 1789 } 1790 1791 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1792 1793 qc->dma_dir = cmd->sc_data_direction; 1794 } 1795 1796 qc->complete_fn = ata_scsi_qc_complete; 1797 1798 if (xlat_func(qc)) 1799 goto early_finish; 1800 1801 if (ap->ops->qc_defer) { 1802 if ((rc = ap->ops->qc_defer(qc))) 1803 goto defer; 1804 } 1805 1806 /* select device, send command to hardware */ 1807 ata_qc_issue(qc); 1808 1809 VPRINTK("EXIT\n"); 1810 return 0; 1811 1812 early_finish: 1813 ata_qc_free(qc); 1814 cmd->scsi_done(cmd); 1815 DPRINTK("EXIT - early finish (good or error)\n"); 1816 return 0; 1817 1818 err_did: 1819 ata_qc_free(qc); 1820 cmd->result = (DID_ERROR << 16); 1821 cmd->scsi_done(cmd); 1822 err_mem: 1823 DPRINTK("EXIT - internal\n"); 1824 return 0; 1825 1826 defer: 1827 ata_qc_free(qc); 1828 DPRINTK("EXIT - defer\n"); 1829 if (rc == ATA_DEFER_LINK) 1830 return SCSI_MLQUEUE_DEVICE_BUSY; 1831 else 1832 return SCSI_MLQUEUE_HOST_BUSY; 1833 } 1834 1835 /** 1836 * ata_scsi_rbuf_get - Map response buffer. 1837 * @cmd: SCSI command containing buffer to be mapped. 1838 * @flags: unsigned long variable to store irq enable status 1839 * @copy_in: copy in from user buffer 1840 * 1841 * Prepare buffer for simulated SCSI commands. 1842 * 1843 * LOCKING: 1844 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 1845 * 1846 * RETURNS: 1847 * Pointer to response buffer. 1848 */ 1849 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 1850 unsigned long *flags) 1851 { 1852 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 1853 1854 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1855 if (copy_in) 1856 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1857 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1858 return ata_scsi_rbuf; 1859 } 1860 1861 /** 1862 * ata_scsi_rbuf_put - Unmap response buffer. 1863 * @cmd: SCSI command containing buffer to be unmapped. 1864 * @copy_out: copy out result 1865 * @flags: @flags passed to ata_scsi_rbuf_get() 1866 * 1867 * Returns rbuf buffer. The result is copied to @cmd's buffer if 1868 * @copy_back is true. 1869 * 1870 * LOCKING: 1871 * Unlocks ata_scsi_rbuf_lock. 1872 */ 1873 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 1874 unsigned long *flags) 1875 { 1876 if (copy_out) 1877 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1878 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 1879 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 1880 } 1881 1882 /** 1883 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1884 * @args: device IDENTIFY data / SCSI command of interest. 1885 * @actor: Callback hook for desired SCSI command simulator 1886 * 1887 * Takes care of the hard work of simulating a SCSI command... 1888 * Mapping the response buffer, calling the command's handler, 1889 * and handling the handler's return value. This return value 1890 * indicates whether the handler wishes the SCSI command to be 1891 * completed successfully (0), or not (in which case cmd->result 1892 * and sense buffer are assumed to be set). 1893 * 1894 * LOCKING: 1895 * spin_lock_irqsave(host lock) 1896 */ 1897 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1898 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 1899 { 1900 u8 *rbuf; 1901 unsigned int rc; 1902 struct scsi_cmnd *cmd = args->cmd; 1903 unsigned long flags; 1904 1905 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 1906 rc = actor(args, rbuf); 1907 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 1908 1909 if (rc == 0) 1910 cmd->result = SAM_STAT_GOOD; 1911 args->done(cmd); 1912 } 1913 1914 /** 1915 * ata_scsiop_inq_std - Simulate INQUIRY command 1916 * @args: device IDENTIFY data / SCSI command of interest. 1917 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1918 * 1919 * Returns standard device identification data associated 1920 * with non-VPD INQUIRY command output. 1921 * 1922 * LOCKING: 1923 * spin_lock_irqsave(host lock) 1924 */ 1925 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 1926 { 1927 const u8 versions[] = { 1928 0x60, /* SAM-3 (no version claimed) */ 1929 1930 0x03, 1931 0x20, /* SBC-2 (no version claimed) */ 1932 1933 0x02, 1934 0x60 /* SPC-3 (no version claimed) */ 1935 }; 1936 u8 hdr[] = { 1937 TYPE_DISK, 1938 0, 1939 0x5, /* claim SPC-3 version compatibility */ 1940 2, 1941 95 - 4 1942 }; 1943 1944 VPRINTK("ENTER\n"); 1945 1946 /* set scsi removeable (RMB) bit per ata bit */ 1947 if (ata_id_removeable(args->id)) 1948 hdr[1] |= (1 << 7); 1949 1950 memcpy(rbuf, hdr, sizeof(hdr)); 1951 memcpy(&rbuf[8], "ATA ", 8); 1952 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 1953 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 1954 1955 if (rbuf[32] == 0 || rbuf[32] == ' ') 1956 memcpy(&rbuf[32], "n/a ", 4); 1957 1958 memcpy(rbuf + 59, versions, sizeof(versions)); 1959 1960 return 0; 1961 } 1962 1963 /** 1964 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1965 * @args: device IDENTIFY data / SCSI command of interest. 1966 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1967 * 1968 * Returns list of inquiry VPD pages available. 1969 * 1970 * LOCKING: 1971 * spin_lock_irqsave(host lock) 1972 */ 1973 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 1974 { 1975 const u8 pages[] = { 1976 0x00, /* page 0x00, this page */ 1977 0x80, /* page 0x80, unit serial no page */ 1978 0x83, /* page 0x83, device ident page */ 1979 0x89, /* page 0x89, ata info page */ 1980 0xb0, /* page 0xb0, block limits page */ 1981 0xb1, /* page 0xb1, block device characteristics page */ 1982 0xb2, /* page 0xb2, thin provisioning page */ 1983 }; 1984 1985 rbuf[3] = sizeof(pages); /* number of supported VPD pages */ 1986 memcpy(rbuf + 4, pages, sizeof(pages)); 1987 return 0; 1988 } 1989 1990 /** 1991 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1992 * @args: device IDENTIFY data / SCSI command of interest. 1993 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1994 * 1995 * Returns ATA device serial number. 1996 * 1997 * LOCKING: 1998 * spin_lock_irqsave(host lock) 1999 */ 2000 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2001 { 2002 const u8 hdr[] = { 2003 0, 2004 0x80, /* this page code */ 2005 0, 2006 ATA_ID_SERNO_LEN, /* page len */ 2007 }; 2008 2009 memcpy(rbuf, hdr, sizeof(hdr)); 2010 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2011 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2012 return 0; 2013 } 2014 2015 /** 2016 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2017 * @args: device IDENTIFY data / SCSI command of interest. 2018 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2019 * 2020 * Yields two logical unit device identification designators: 2021 * - vendor specific ASCII containing the ATA serial number 2022 * - SAT defined "t10 vendor id based" containing ASCII vendor 2023 * name ("ATA "), model and serial numbers. 2024 * 2025 * LOCKING: 2026 * spin_lock_irqsave(host lock) 2027 */ 2028 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2029 { 2030 const int sat_model_serial_desc_len = 68; 2031 int num; 2032 2033 rbuf[1] = 0x83; /* this page code */ 2034 num = 4; 2035 2036 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2037 rbuf[num + 0] = 2; 2038 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2039 num += 4; 2040 ata_id_string(args->id, (unsigned char *) rbuf + num, 2041 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2042 num += ATA_ID_SERNO_LEN; 2043 2044 /* SAT defined lu model and serial numbers descriptor */ 2045 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2046 rbuf[num + 0] = 2; 2047 rbuf[num + 1] = 1; 2048 rbuf[num + 3] = sat_model_serial_desc_len; 2049 num += 4; 2050 memcpy(rbuf + num, "ATA ", 8); 2051 num += 8; 2052 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2053 ATA_ID_PROD_LEN); 2054 num += ATA_ID_PROD_LEN; 2055 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2056 ATA_ID_SERNO_LEN); 2057 num += ATA_ID_SERNO_LEN; 2058 2059 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2060 return 0; 2061 } 2062 2063 /** 2064 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2065 * @args: device IDENTIFY data / SCSI command of interest. 2066 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2067 * 2068 * Yields SAT-specified ATA VPD page. 2069 * 2070 * LOCKING: 2071 * spin_lock_irqsave(host lock) 2072 */ 2073 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2074 { 2075 struct ata_taskfile tf; 2076 2077 memset(&tf, 0, sizeof(tf)); 2078 2079 rbuf[1] = 0x89; /* our page code */ 2080 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2081 rbuf[3] = (0x238 & 0xff); 2082 2083 memcpy(&rbuf[8], "linux ", 8); 2084 memcpy(&rbuf[16], "libata ", 16); 2085 memcpy(&rbuf[32], DRV_VERSION, 4); 2086 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2087 2088 /* we don't store the ATA device signature, so we fake it */ 2089 2090 tf.command = ATA_DRDY; /* really, this is Status reg */ 2091 tf.lbal = 0x1; 2092 tf.nsect = 0x1; 2093 2094 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2095 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2096 2097 rbuf[56] = ATA_CMD_ID_ATA; 2098 2099 memcpy(&rbuf[60], &args->id[0], 512); 2100 return 0; 2101 } 2102 2103 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2104 { 2105 u16 min_io_sectors; 2106 2107 rbuf[1] = 0xb0; 2108 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2109 2110 /* 2111 * Optimal transfer length granularity. 2112 * 2113 * This is always one physical block, but for disks with a smaller 2114 * logical than physical sector size we need to figure out what the 2115 * latter is. 2116 */ 2117 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2118 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2119 2120 /* 2121 * Optimal unmap granularity. 2122 * 2123 * The ATA spec doesn't even know about a granularity or alignment 2124 * for the TRIM command. We can leave away most of the unmap related 2125 * VPD page entries, but we have specifify a granularity to signal 2126 * that we support some form of unmap - in thise case via WRITE SAME 2127 * with the unmap bit set. 2128 */ 2129 if (ata_id_has_trim(args->id)) { 2130 put_unaligned_be32(65535 * 512 / 8, &rbuf[20]); 2131 put_unaligned_be32(1, &rbuf[28]); 2132 } 2133 2134 return 0; 2135 } 2136 2137 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2138 { 2139 int form_factor = ata_id_form_factor(args->id); 2140 int media_rotation_rate = ata_id_rotation_rate(args->id); 2141 2142 rbuf[1] = 0xb1; 2143 rbuf[3] = 0x3c; 2144 rbuf[4] = media_rotation_rate >> 8; 2145 rbuf[5] = media_rotation_rate; 2146 rbuf[7] = form_factor; 2147 2148 return 0; 2149 } 2150 2151 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2152 { 2153 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2154 rbuf[1] = 0xb2; 2155 rbuf[3] = 0x4; 2156 rbuf[5] = 1 << 6; /* TPWS */ 2157 2158 return 0; 2159 } 2160 2161 /** 2162 * ata_scsiop_noop - Command handler that simply returns success. 2163 * @args: device IDENTIFY data / SCSI command of interest. 2164 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2165 * 2166 * No operation. Simply returns success to caller, to indicate 2167 * that the caller should successfully complete this SCSI command. 2168 * 2169 * LOCKING: 2170 * spin_lock_irqsave(host lock) 2171 */ 2172 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) 2173 { 2174 VPRINTK("ENTER\n"); 2175 return 0; 2176 } 2177 2178 /** 2179 * ata_msense_caching - Simulate MODE SENSE caching info page 2180 * @id: device IDENTIFY data 2181 * @buf: output buffer 2182 * 2183 * Generate a caching info page, which conditionally indicates 2184 * write caching to the SCSI layer, depending on device 2185 * capabilities. 2186 * 2187 * LOCKING: 2188 * None. 2189 */ 2190 static unsigned int ata_msense_caching(u16 *id, u8 *buf) 2191 { 2192 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage)); 2193 if (ata_id_wcache_enabled(id)) 2194 buf[2] |= (1 << 2); /* write cache enable */ 2195 if (!ata_id_rahead_enabled(id)) 2196 buf[12] |= (1 << 5); /* disable read ahead */ 2197 return sizeof(def_cache_mpage); 2198 } 2199 2200 /** 2201 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page 2202 * @buf: output buffer 2203 * 2204 * Generate a generic MODE SENSE control mode page. 2205 * 2206 * LOCKING: 2207 * None. 2208 */ 2209 static unsigned int ata_msense_ctl_mode(u8 *buf) 2210 { 2211 memcpy(buf, def_control_mpage, sizeof(def_control_mpage)); 2212 return sizeof(def_control_mpage); 2213 } 2214 2215 /** 2216 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2217 * @buf: output buffer 2218 * 2219 * Generate a generic MODE SENSE r/w error recovery page. 2220 * 2221 * LOCKING: 2222 * None. 2223 */ 2224 static unsigned int ata_msense_rw_recovery(u8 *buf) 2225 { 2226 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage)); 2227 return sizeof(def_rw_recovery_mpage); 2228 } 2229 2230 /* 2231 * We can turn this into a real blacklist if it's needed, for now just 2232 * blacklist any Maxtor BANC1G10 revision firmware 2233 */ 2234 static int ata_dev_supports_fua(u16 *id) 2235 { 2236 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2237 2238 if (!libata_fua) 2239 return 0; 2240 if (!ata_id_has_fua(id)) 2241 return 0; 2242 2243 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2244 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2245 2246 if (strcmp(model, "Maxtor")) 2247 return 1; 2248 if (strcmp(fw, "BANC1G10")) 2249 return 1; 2250 2251 return 0; /* blacklisted */ 2252 } 2253 2254 /** 2255 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2256 * @args: device IDENTIFY data / SCSI command of interest. 2257 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2258 * 2259 * Simulate MODE SENSE commands. Assume this is invoked for direct 2260 * access devices (e.g. disks) only. There should be no block 2261 * descriptor for other device types. 2262 * 2263 * LOCKING: 2264 * spin_lock_irqsave(host lock) 2265 */ 2266 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2267 { 2268 struct ata_device *dev = args->dev; 2269 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2270 const u8 sat_blk_desc[] = { 2271 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2272 0, 2273 0, 0x2, 0x0 /* block length: 512 bytes */ 2274 }; 2275 u8 pg, spg; 2276 unsigned int ebd, page_control, six_byte; 2277 u8 dpofua; 2278 2279 VPRINTK("ENTER\n"); 2280 2281 six_byte = (scsicmd[0] == MODE_SENSE); 2282 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2283 /* 2284 * LLBA bit in msense(10) ignored (compliant) 2285 */ 2286 2287 page_control = scsicmd[2] >> 6; 2288 switch (page_control) { 2289 case 0: /* current */ 2290 break; /* supported */ 2291 case 3: /* saved */ 2292 goto saving_not_supp; 2293 case 1: /* changeable */ 2294 case 2: /* defaults */ 2295 default: 2296 goto invalid_fld; 2297 } 2298 2299 if (six_byte) 2300 p += 4 + (ebd ? 8 : 0); 2301 else 2302 p += 8 + (ebd ? 8 : 0); 2303 2304 pg = scsicmd[2] & 0x3f; 2305 spg = scsicmd[3]; 2306 /* 2307 * No mode subpages supported (yet) but asking for _all_ 2308 * subpages may be valid 2309 */ 2310 if (spg && (spg != ALL_SUB_MPAGES)) 2311 goto invalid_fld; 2312 2313 switch(pg) { 2314 case RW_RECOVERY_MPAGE: 2315 p += ata_msense_rw_recovery(p); 2316 break; 2317 2318 case CACHE_MPAGE: 2319 p += ata_msense_caching(args->id, p); 2320 break; 2321 2322 case CONTROL_MPAGE: 2323 p += ata_msense_ctl_mode(p); 2324 break; 2325 2326 case ALL_MPAGES: 2327 p += ata_msense_rw_recovery(p); 2328 p += ata_msense_caching(args->id, p); 2329 p += ata_msense_ctl_mode(p); 2330 break; 2331 2332 default: /* invalid page code */ 2333 goto invalid_fld; 2334 } 2335 2336 dpofua = 0; 2337 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2338 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2339 dpofua = 1 << 4; 2340 2341 if (six_byte) { 2342 rbuf[0] = p - rbuf - 1; 2343 rbuf[2] |= dpofua; 2344 if (ebd) { 2345 rbuf[3] = sizeof(sat_blk_desc); 2346 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2347 } 2348 } else { 2349 unsigned int output_len = p - rbuf - 2; 2350 2351 rbuf[0] = output_len >> 8; 2352 rbuf[1] = output_len; 2353 rbuf[3] |= dpofua; 2354 if (ebd) { 2355 rbuf[7] = sizeof(sat_blk_desc); 2356 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2357 } 2358 } 2359 return 0; 2360 2361 invalid_fld: 2362 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); 2363 /* "Invalid field in cbd" */ 2364 return 1; 2365 2366 saving_not_supp: 2367 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2368 /* "Saving parameters not supported" */ 2369 return 1; 2370 } 2371 2372 /** 2373 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2374 * @args: device IDENTIFY data / SCSI command of interest. 2375 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2376 * 2377 * Simulate READ CAPACITY commands. 2378 * 2379 * LOCKING: 2380 * None. 2381 */ 2382 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2383 { 2384 struct ata_device *dev = args->dev; 2385 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2386 u32 sector_size; /* physical sector size in bytes */ 2387 u8 log2_per_phys; 2388 u16 lowest_aligned; 2389 2390 sector_size = ata_id_logical_sector_size(dev->id); 2391 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2392 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2393 2394 VPRINTK("ENTER\n"); 2395 2396 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2397 if (last_lba >= 0xffffffffULL) 2398 last_lba = 0xffffffff; 2399 2400 /* sector count, 32-bit */ 2401 rbuf[0] = last_lba >> (8 * 3); 2402 rbuf[1] = last_lba >> (8 * 2); 2403 rbuf[2] = last_lba >> (8 * 1); 2404 rbuf[3] = last_lba; 2405 2406 /* sector size */ 2407 rbuf[4] = sector_size >> (8 * 3); 2408 rbuf[5] = sector_size >> (8 * 2); 2409 rbuf[6] = sector_size >> (8 * 1); 2410 rbuf[7] = sector_size; 2411 } else { 2412 /* sector count, 64-bit */ 2413 rbuf[0] = last_lba >> (8 * 7); 2414 rbuf[1] = last_lba >> (8 * 6); 2415 rbuf[2] = last_lba >> (8 * 5); 2416 rbuf[3] = last_lba >> (8 * 4); 2417 rbuf[4] = last_lba >> (8 * 3); 2418 rbuf[5] = last_lba >> (8 * 2); 2419 rbuf[6] = last_lba >> (8 * 1); 2420 rbuf[7] = last_lba; 2421 2422 /* sector size */ 2423 rbuf[ 8] = sector_size >> (8 * 3); 2424 rbuf[ 9] = sector_size >> (8 * 2); 2425 rbuf[10] = sector_size >> (8 * 1); 2426 rbuf[11] = sector_size; 2427 2428 rbuf[12] = 0; 2429 rbuf[13] = log2_per_phys; 2430 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2431 rbuf[15] = lowest_aligned; 2432 2433 if (ata_id_has_trim(args->id)) { 2434 rbuf[14] |= 0x80; /* TPE */ 2435 2436 if (ata_id_has_zero_after_trim(args->id)) 2437 rbuf[14] |= 0x40; /* TPRZ */ 2438 } 2439 } 2440 2441 return 0; 2442 } 2443 2444 /** 2445 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2446 * @args: device IDENTIFY data / SCSI command of interest. 2447 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2448 * 2449 * Simulate REPORT LUNS command. 2450 * 2451 * LOCKING: 2452 * spin_lock_irqsave(host lock) 2453 */ 2454 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2455 { 2456 VPRINTK("ENTER\n"); 2457 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2458 2459 return 0; 2460 } 2461 2462 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2463 { 2464 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2465 /* FIXME: not quite right; we don't want the 2466 * translation of taskfile registers into 2467 * a sense descriptors, since that's only 2468 * correct for ATA, not ATAPI 2469 */ 2470 ata_gen_passthru_sense(qc); 2471 } 2472 2473 qc->scsidone(qc->scsicmd); 2474 ata_qc_free(qc); 2475 } 2476 2477 /* is it pointless to prefer PIO for "safety reasons"? */ 2478 static inline int ata_pio_use_silly(struct ata_port *ap) 2479 { 2480 return (ap->flags & ATA_FLAG_PIO_DMA); 2481 } 2482 2483 static void atapi_request_sense(struct ata_queued_cmd *qc) 2484 { 2485 struct ata_port *ap = qc->ap; 2486 struct scsi_cmnd *cmd = qc->scsicmd; 2487 2488 DPRINTK("ATAPI request sense\n"); 2489 2490 /* FIXME: is this needed? */ 2491 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2492 2493 #ifdef CONFIG_ATA_SFF 2494 if (ap->ops->sff_tf_read) 2495 ap->ops->sff_tf_read(ap, &qc->tf); 2496 #endif 2497 2498 /* fill these in, for the case where they are -not- overwritten */ 2499 cmd->sense_buffer[0] = 0x70; 2500 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2501 2502 ata_qc_reinit(qc); 2503 2504 /* setup sg table and init transfer direction */ 2505 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2506 ata_sg_init(qc, &qc->sgent, 1); 2507 qc->dma_dir = DMA_FROM_DEVICE; 2508 2509 memset(&qc->cdb, 0, qc->dev->cdb_len); 2510 qc->cdb[0] = REQUEST_SENSE; 2511 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2512 2513 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2514 qc->tf.command = ATA_CMD_PACKET; 2515 2516 if (ata_pio_use_silly(ap)) { 2517 qc->tf.protocol = ATAPI_PROT_DMA; 2518 qc->tf.feature |= ATAPI_PKT_DMA; 2519 } else { 2520 qc->tf.protocol = ATAPI_PROT_PIO; 2521 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2522 qc->tf.lbah = 0; 2523 } 2524 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2525 2526 qc->complete_fn = atapi_sense_complete; 2527 2528 ata_qc_issue(qc); 2529 2530 DPRINTK("EXIT\n"); 2531 } 2532 2533 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2534 { 2535 struct scsi_cmnd *cmd = qc->scsicmd; 2536 unsigned int err_mask = qc->err_mask; 2537 2538 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2539 2540 /* handle completion from new EH */ 2541 if (unlikely(qc->ap->ops->error_handler && 2542 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2543 2544 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2545 /* FIXME: not quite right; we don't want the 2546 * translation of taskfile registers into a 2547 * sense descriptors, since that's only 2548 * correct for ATA, not ATAPI 2549 */ 2550 ata_gen_passthru_sense(qc); 2551 } 2552 2553 /* SCSI EH automatically locks door if sdev->locked is 2554 * set. Sometimes door lock request continues to 2555 * fail, for example, when no media is present. This 2556 * creates a loop - SCSI EH issues door lock which 2557 * fails and gets invoked again to acquire sense data 2558 * for the failed command. 2559 * 2560 * If door lock fails, always clear sdev->locked to 2561 * avoid this infinite loop. 2562 * 2563 * This may happen before SCSI scan is complete. Make 2564 * sure qc->dev->sdev isn't NULL before dereferencing. 2565 */ 2566 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2567 qc->dev->sdev->locked = 0; 2568 2569 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2570 qc->scsidone(cmd); 2571 ata_qc_free(qc); 2572 return; 2573 } 2574 2575 /* successful completion or old EH failure path */ 2576 if (unlikely(err_mask & AC_ERR_DEV)) { 2577 cmd->result = SAM_STAT_CHECK_CONDITION; 2578 atapi_request_sense(qc); 2579 return; 2580 } else if (unlikely(err_mask)) { 2581 /* FIXME: not quite right; we don't want the 2582 * translation of taskfile registers into 2583 * a sense descriptors, since that's only 2584 * correct for ATA, not ATAPI 2585 */ 2586 ata_gen_passthru_sense(qc); 2587 } else { 2588 u8 *scsicmd = cmd->cmnd; 2589 2590 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { 2591 unsigned long flags; 2592 u8 *buf; 2593 2594 buf = ata_scsi_rbuf_get(cmd, true, &flags); 2595 2596 /* ATAPI devices typically report zero for their SCSI version, 2597 * and sometimes deviate from the spec WRT response data 2598 * format. If SCSI version is reported as zero like normal, 2599 * then we make the following fixups: 1) Fake MMC-5 version, 2600 * to indicate to the Linux scsi midlayer this is a modern 2601 * device. 2) Ensure response data format / ATAPI information 2602 * are always correct. 2603 */ 2604 if (buf[2] == 0) { 2605 buf[2] = 0x5; 2606 buf[3] = 0x32; 2607 } 2608 2609 ata_scsi_rbuf_put(cmd, true, &flags); 2610 } 2611 2612 cmd->result = SAM_STAT_GOOD; 2613 } 2614 2615 qc->scsidone(cmd); 2616 ata_qc_free(qc); 2617 } 2618 /** 2619 * atapi_xlat - Initialize PACKET taskfile 2620 * @qc: command structure to be initialized 2621 * 2622 * LOCKING: 2623 * spin_lock_irqsave(host lock) 2624 * 2625 * RETURNS: 2626 * Zero on success, non-zero on failure. 2627 */ 2628 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2629 { 2630 struct scsi_cmnd *scmd = qc->scsicmd; 2631 struct ata_device *dev = qc->dev; 2632 int nodata = (scmd->sc_data_direction == DMA_NONE); 2633 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2634 unsigned int nbytes; 2635 2636 memset(qc->cdb, 0, dev->cdb_len); 2637 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2638 2639 qc->complete_fn = atapi_qc_complete; 2640 2641 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2642 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2643 qc->tf.flags |= ATA_TFLAG_WRITE; 2644 DPRINTK("direction: write\n"); 2645 } 2646 2647 qc->tf.command = ATA_CMD_PACKET; 2648 ata_qc_set_pc_nbytes(qc); 2649 2650 /* check whether ATAPI DMA is safe */ 2651 if (!nodata && !using_pio && atapi_check_dma(qc)) 2652 using_pio = 1; 2653 2654 /* Some controller variants snoop this value for Packet 2655 * transfers to do state machine and FIFO management. Thus we 2656 * want to set it properly, and for DMA where it is 2657 * effectively meaningless. 2658 */ 2659 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2660 2661 /* Most ATAPI devices which honor transfer chunk size don't 2662 * behave according to the spec when odd chunk size which 2663 * matches the transfer length is specified. If the number of 2664 * bytes to transfer is 2n+1. According to the spec, what 2665 * should happen is to indicate that 2n+1 is going to be 2666 * transferred and transfer 2n+2 bytes where the last byte is 2667 * padding. 2668 * 2669 * In practice, this doesn't happen. ATAPI devices first 2670 * indicate and transfer 2n bytes and then indicate and 2671 * transfer 2 bytes where the last byte is padding. 2672 * 2673 * This inconsistency confuses several controllers which 2674 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2675 * These controllers use actual number of transferred bytes to 2676 * update DMA poitner and transfer of 4n+2 bytes make those 2677 * controller push DMA pointer by 4n+4 bytes because SATA data 2678 * FISes are aligned to 4 bytes. This causes data corruption 2679 * and buffer overrun. 2680 * 2681 * Always setting nbytes to even number solves this problem 2682 * because then ATAPI devices don't have to split data at 2n 2683 * boundaries. 2684 */ 2685 if (nbytes & 0x1) 2686 nbytes++; 2687 2688 qc->tf.lbam = (nbytes & 0xFF); 2689 qc->tf.lbah = (nbytes >> 8); 2690 2691 if (nodata) 2692 qc->tf.protocol = ATAPI_PROT_NODATA; 2693 else if (using_pio) 2694 qc->tf.protocol = ATAPI_PROT_PIO; 2695 else { 2696 /* DMA data xfer */ 2697 qc->tf.protocol = ATAPI_PROT_DMA; 2698 qc->tf.feature |= ATAPI_PKT_DMA; 2699 2700 if ((dev->flags & ATA_DFLAG_DMADIR) && 2701 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2702 /* some SATA bridges need us to indicate data xfer direction */ 2703 qc->tf.feature |= ATAPI_DMADIR; 2704 } 2705 2706 2707 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2708 as ATAPI tape drives don't get this right otherwise */ 2709 return 0; 2710 } 2711 2712 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2713 { 2714 if (!sata_pmp_attached(ap)) { 2715 if (likely(devno < ata_link_max_devices(&ap->link))) 2716 return &ap->link.device[devno]; 2717 } else { 2718 if (likely(devno < ap->nr_pmp_links)) 2719 return &ap->pmp_link[devno].device[0]; 2720 } 2721 2722 return NULL; 2723 } 2724 2725 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2726 const struct scsi_device *scsidev) 2727 { 2728 int devno; 2729 2730 /* skip commands not addressed to targets we simulate */ 2731 if (!sata_pmp_attached(ap)) { 2732 if (unlikely(scsidev->channel || scsidev->lun)) 2733 return NULL; 2734 devno = scsidev->id; 2735 } else { 2736 if (unlikely(scsidev->id || scsidev->lun)) 2737 return NULL; 2738 devno = scsidev->channel; 2739 } 2740 2741 return ata_find_dev(ap, devno); 2742 } 2743 2744 /** 2745 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2746 * @ap: ATA port to which the device is attached 2747 * @scsidev: SCSI device from which we derive the ATA device 2748 * 2749 * Given various information provided in struct scsi_cmnd, 2750 * map that onto an ATA bus, and using that mapping 2751 * determine which ata_device is associated with the 2752 * SCSI command to be sent. 2753 * 2754 * LOCKING: 2755 * spin_lock_irqsave(host lock) 2756 * 2757 * RETURNS: 2758 * Associated ATA device, or %NULL if not found. 2759 */ 2760 static struct ata_device * 2761 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2762 { 2763 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2764 2765 if (unlikely(!dev || !ata_dev_enabled(dev))) 2766 return NULL; 2767 2768 return dev; 2769 } 2770 2771 /* 2772 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2773 * @byte1: Byte 1 from pass-thru CDB. 2774 * 2775 * RETURNS: 2776 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2777 */ 2778 static u8 2779 ata_scsi_map_proto(u8 byte1) 2780 { 2781 switch((byte1 & 0x1e) >> 1) { 2782 case 3: /* Non-data */ 2783 return ATA_PROT_NODATA; 2784 2785 case 6: /* DMA */ 2786 case 10: /* UDMA Data-in */ 2787 case 11: /* UDMA Data-Out */ 2788 return ATA_PROT_DMA; 2789 2790 case 4: /* PIO Data-in */ 2791 case 5: /* PIO Data-out */ 2792 return ATA_PROT_PIO; 2793 2794 case 0: /* Hard Reset */ 2795 case 1: /* SRST */ 2796 case 8: /* Device Diagnostic */ 2797 case 9: /* Device Reset */ 2798 case 7: /* DMA Queued */ 2799 case 12: /* FPDMA */ 2800 case 15: /* Return Response Info */ 2801 default: /* Reserved */ 2802 break; 2803 } 2804 2805 return ATA_PROT_UNKNOWN; 2806 } 2807 2808 /** 2809 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2810 * @qc: command structure to be initialized 2811 * 2812 * Handles either 12 or 16-byte versions of the CDB. 2813 * 2814 * RETURNS: 2815 * Zero on success, non-zero on failure. 2816 */ 2817 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2818 { 2819 struct ata_taskfile *tf = &(qc->tf); 2820 struct scsi_cmnd *scmd = qc->scsicmd; 2821 struct ata_device *dev = qc->dev; 2822 const u8 *cdb = scmd->cmnd; 2823 2824 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) 2825 goto invalid_fld; 2826 2827 /* 2828 * 12 and 16 byte CDBs use different offsets to 2829 * provide the various register values. 2830 */ 2831 if (cdb[0] == ATA_16) { 2832 /* 2833 * 16-byte CDB - may contain extended commands. 2834 * 2835 * If that is the case, copy the upper byte register values. 2836 */ 2837 if (cdb[1] & 0x01) { 2838 tf->hob_feature = cdb[3]; 2839 tf->hob_nsect = cdb[5]; 2840 tf->hob_lbal = cdb[7]; 2841 tf->hob_lbam = cdb[9]; 2842 tf->hob_lbah = cdb[11]; 2843 tf->flags |= ATA_TFLAG_LBA48; 2844 } else 2845 tf->flags &= ~ATA_TFLAG_LBA48; 2846 2847 /* 2848 * Always copy low byte, device and command registers. 2849 */ 2850 tf->feature = cdb[4]; 2851 tf->nsect = cdb[6]; 2852 tf->lbal = cdb[8]; 2853 tf->lbam = cdb[10]; 2854 tf->lbah = cdb[12]; 2855 tf->device = cdb[13]; 2856 tf->command = cdb[14]; 2857 } else { 2858 /* 2859 * 12-byte CDB - incapable of extended commands. 2860 */ 2861 tf->flags &= ~ATA_TFLAG_LBA48; 2862 2863 tf->feature = cdb[3]; 2864 tf->nsect = cdb[4]; 2865 tf->lbal = cdb[5]; 2866 tf->lbam = cdb[6]; 2867 tf->lbah = cdb[7]; 2868 tf->device = cdb[8]; 2869 tf->command = cdb[9]; 2870 } 2871 2872 /* enforce correct master/slave bit */ 2873 tf->device = dev->devno ? 2874 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2875 2876 switch (tf->command) { 2877 /* READ/WRITE LONG use a non-standard sect_size */ 2878 case ATA_CMD_READ_LONG: 2879 case ATA_CMD_READ_LONG_ONCE: 2880 case ATA_CMD_WRITE_LONG: 2881 case ATA_CMD_WRITE_LONG_ONCE: 2882 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) 2883 goto invalid_fld; 2884 qc->sect_size = scsi_bufflen(scmd); 2885 break; 2886 2887 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 2888 case ATA_CMD_CFA_WRITE_NE: 2889 case ATA_CMD_CFA_TRANS_SECT: 2890 case ATA_CMD_CFA_WRITE_MULT_NE: 2891 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 2892 case ATA_CMD_READ: 2893 case ATA_CMD_READ_EXT: 2894 case ATA_CMD_READ_QUEUED: 2895 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 2896 case ATA_CMD_FPDMA_READ: 2897 case ATA_CMD_READ_MULTI: 2898 case ATA_CMD_READ_MULTI_EXT: 2899 case ATA_CMD_PIO_READ: 2900 case ATA_CMD_PIO_READ_EXT: 2901 case ATA_CMD_READ_STREAM_DMA_EXT: 2902 case ATA_CMD_READ_STREAM_EXT: 2903 case ATA_CMD_VERIFY: 2904 case ATA_CMD_VERIFY_EXT: 2905 case ATA_CMD_WRITE: 2906 case ATA_CMD_WRITE_EXT: 2907 case ATA_CMD_WRITE_FUA_EXT: 2908 case ATA_CMD_WRITE_QUEUED: 2909 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 2910 case ATA_CMD_FPDMA_WRITE: 2911 case ATA_CMD_WRITE_MULTI: 2912 case ATA_CMD_WRITE_MULTI_EXT: 2913 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2914 case ATA_CMD_PIO_WRITE: 2915 case ATA_CMD_PIO_WRITE_EXT: 2916 case ATA_CMD_WRITE_STREAM_DMA_EXT: 2917 case ATA_CMD_WRITE_STREAM_EXT: 2918 qc->sect_size = scmd->device->sector_size; 2919 break; 2920 2921 /* Everything else uses 512 byte "sectors" */ 2922 default: 2923 qc->sect_size = ATA_SECT_SIZE; 2924 } 2925 2926 /* 2927 * Set flags so that all registers will be written, pass on 2928 * write indication (used for PIO/DMA setup), result TF is 2929 * copied back and we don't whine too much about its failure. 2930 */ 2931 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2932 if (scmd->sc_data_direction == DMA_TO_DEVICE) 2933 tf->flags |= ATA_TFLAG_WRITE; 2934 2935 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 2936 2937 /* 2938 * Set transfer length. 2939 * 2940 * TODO: find out if we need to do more here to 2941 * cover scatter/gather case. 2942 */ 2943 ata_qc_set_pc_nbytes(qc); 2944 2945 /* We may not issue DMA commands if no DMA mode is set */ 2946 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) 2947 goto invalid_fld; 2948 2949 /* sanity check for pio multi commands */ 2950 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) 2951 goto invalid_fld; 2952 2953 if (is_multi_taskfile(tf)) { 2954 unsigned int multi_count = 1 << (cdb[1] >> 5); 2955 2956 /* compare the passed through multi_count 2957 * with the cached multi_count of libata 2958 */ 2959 if (multi_count != dev->multi_count) 2960 ata_dev_printk(dev, KERN_WARNING, 2961 "invalid multi_count %u ignored\n", 2962 multi_count); 2963 } 2964 2965 /* 2966 * Filter SET_FEATURES - XFER MODE command -- otherwise, 2967 * SET_FEATURES - XFER MODE must be preceded/succeeded 2968 * by an update to hardware-specific registers for each 2969 * controller (i.e. the reason for ->set_piomode(), 2970 * ->set_dmamode(), and ->post_set_mode() hooks). 2971 */ 2972 if (tf->command == ATA_CMD_SET_FEATURES && 2973 tf->feature == SETFEATURES_XFER) 2974 goto invalid_fld; 2975 2976 /* 2977 * Filter TPM commands by default. These provide an 2978 * essentially uncontrolled encrypted "back door" between 2979 * applications and the disk. Set libata.allow_tpm=1 if you 2980 * have a real reason for wanting to use them. This ensures 2981 * that installed software cannot easily mess stuff up without 2982 * user intent. DVR type users will probably ship with this enabled 2983 * for movie content management. 2984 * 2985 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 2986 * for this and should do in future but that it is not sufficient as 2987 * DCS is an optional feature set. Thus we also do the software filter 2988 * so that we comply with the TC consortium stated goal that the user 2989 * can turn off TC features of their system. 2990 */ 2991 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) 2992 goto invalid_fld; 2993 2994 return 0; 2995 2996 invalid_fld: 2997 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); 2998 /* "Invalid field in cdb" */ 2999 return 1; 3000 } 3001 3002 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3003 { 3004 struct ata_taskfile *tf = &qc->tf; 3005 struct scsi_cmnd *scmd = qc->scsicmd; 3006 struct ata_device *dev = qc->dev; 3007 const u8 *cdb = scmd->cmnd; 3008 u64 block; 3009 u32 n_block; 3010 u32 size; 3011 void *buf; 3012 3013 /* we may not issue DMA commands if no DMA mode is set */ 3014 if (unlikely(!dev->dma_mode)) 3015 goto invalid_fld; 3016 3017 if (unlikely(scmd->cmd_len < 16)) 3018 goto invalid_fld; 3019 scsi_16_lba_len(cdb, &block, &n_block); 3020 3021 /* for now we only support WRITE SAME with the unmap bit set */ 3022 if (unlikely(!(cdb[1] & 0x8))) 3023 goto invalid_fld; 3024 3025 /* 3026 * WRITE SAME always has a sector sized buffer as payload, this 3027 * should never be a multiple entry S/G list. 3028 */ 3029 if (!scsi_sg_count(scmd)) 3030 goto invalid_fld; 3031 3032 buf = page_address(sg_page(scsi_sglist(scmd))); 3033 size = ata_set_lba_range_entries(buf, 512, block, n_block); 3034 3035 tf->protocol = ATA_PROT_DMA; 3036 tf->hob_feature = 0; 3037 tf->feature = ATA_DSM_TRIM; 3038 tf->hob_nsect = (size / 512) >> 8; 3039 tf->nsect = size / 512; 3040 tf->command = ATA_CMD_DSM; 3041 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3042 ATA_TFLAG_WRITE; 3043 3044 ata_qc_set_pc_nbytes(qc); 3045 3046 return 0; 3047 3048 invalid_fld: 3049 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); 3050 /* "Invalid field in cdb" */ 3051 return 1; 3052 } 3053 3054 /** 3055 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3056 * @dev: ATA device 3057 * @cmd: SCSI command opcode to consider 3058 * 3059 * Look up the SCSI command given, and determine whether the 3060 * SCSI command is to be translated or simulated. 3061 * 3062 * RETURNS: 3063 * Pointer to translation function if possible, %NULL if not. 3064 */ 3065 3066 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3067 { 3068 switch (cmd) { 3069 case READ_6: 3070 case READ_10: 3071 case READ_16: 3072 3073 case WRITE_6: 3074 case WRITE_10: 3075 case WRITE_16: 3076 return ata_scsi_rw_xlat; 3077 3078 case WRITE_SAME_16: 3079 return ata_scsi_write_same_xlat; 3080 3081 case SYNCHRONIZE_CACHE: 3082 if (ata_try_flush_cache(dev)) 3083 return ata_scsi_flush_xlat; 3084 break; 3085 3086 case VERIFY: 3087 case VERIFY_16: 3088 return ata_scsi_verify_xlat; 3089 3090 case ATA_12: 3091 case ATA_16: 3092 return ata_scsi_pass_thru; 3093 3094 case START_STOP: 3095 return ata_scsi_start_stop_xlat; 3096 } 3097 3098 return NULL; 3099 } 3100 3101 /** 3102 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 3103 * @ap: ATA port to which the command was being sent 3104 * @cmd: SCSI command to dump 3105 * 3106 * Prints the contents of a SCSI command via printk(). 3107 */ 3108 3109 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 3110 struct scsi_cmnd *cmd) 3111 { 3112 #ifdef ATA_DEBUG 3113 struct scsi_device *scsidev = cmd->device; 3114 u8 *scsicmd = cmd->cmnd; 3115 3116 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 3117 ap->print_id, 3118 scsidev->channel, scsidev->id, scsidev->lun, 3119 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], 3120 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], 3121 scsicmd[8]); 3122 #endif 3123 } 3124 3125 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 3126 struct ata_device *dev) 3127 { 3128 u8 scsi_op = scmd->cmnd[0]; 3129 ata_xlat_func_t xlat_func; 3130 int rc = 0; 3131 3132 if (dev->class == ATA_DEV_ATA) { 3133 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 3134 goto bad_cdb_len; 3135 3136 xlat_func = ata_get_xlat_func(dev, scsi_op); 3137 } else { 3138 if (unlikely(!scmd->cmd_len)) 3139 goto bad_cdb_len; 3140 3141 xlat_func = NULL; 3142 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3143 /* relay SCSI command to ATAPI device */ 3144 int len = COMMAND_SIZE(scsi_op); 3145 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 3146 goto bad_cdb_len; 3147 3148 xlat_func = atapi_xlat; 3149 } else { 3150 /* ATA_16 passthru, treat as an ATA command */ 3151 if (unlikely(scmd->cmd_len > 16)) 3152 goto bad_cdb_len; 3153 3154 xlat_func = ata_get_xlat_func(dev, scsi_op); 3155 } 3156 } 3157 3158 if (xlat_func) 3159 rc = ata_scsi_translate(dev, scmd, xlat_func); 3160 else 3161 ata_scsi_simulate(dev, scmd); 3162 3163 return rc; 3164 3165 bad_cdb_len: 3166 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 3167 scmd->cmd_len, scsi_op, dev->cdb_len); 3168 scmd->result = DID_ERROR << 16; 3169 scmd->scsi_done(scmd); 3170 return 0; 3171 } 3172 3173 /** 3174 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 3175 * @shost: SCSI host of command to be sent 3176 * @cmd: SCSI command to be sent 3177 * 3178 * In some cases, this function translates SCSI commands into 3179 * ATA taskfiles, and queues the taskfiles to be sent to 3180 * hardware. In other cases, this function simulates a 3181 * SCSI device by evaluating and responding to certain 3182 * SCSI commands. This creates the overall effect of 3183 * ATA and ATAPI devices appearing as SCSI devices. 3184 * 3185 * LOCKING: 3186 * ATA host lock 3187 * 3188 * RETURNS: 3189 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 3190 * 0 otherwise. 3191 */ 3192 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 3193 { 3194 struct ata_port *ap; 3195 struct ata_device *dev; 3196 struct scsi_device *scsidev = cmd->device; 3197 int rc = 0; 3198 unsigned long irq_flags; 3199 3200 ap = ata_shost_to_port(shost); 3201 3202 spin_lock_irqsave(ap->lock, irq_flags); 3203 3204 ata_scsi_dump_cdb(ap, cmd); 3205 3206 dev = ata_scsi_find_dev(ap, scsidev); 3207 if (likely(dev)) 3208 rc = __ata_scsi_queuecmd(cmd, dev); 3209 else { 3210 cmd->result = (DID_BAD_TARGET << 16); 3211 cmd->scsi_done(cmd); 3212 } 3213 3214 spin_unlock_irqrestore(ap->lock, irq_flags); 3215 3216 return rc; 3217 } 3218 3219 /** 3220 * ata_scsi_simulate - simulate SCSI command on ATA device 3221 * @dev: the target device 3222 * @cmd: SCSI command being sent to device. 3223 * 3224 * Interprets and directly executes a select list of SCSI commands 3225 * that can be handled internally. 3226 * 3227 * LOCKING: 3228 * spin_lock_irqsave(host lock) 3229 */ 3230 3231 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 3232 { 3233 struct ata_scsi_args args; 3234 const u8 *scsicmd = cmd->cmnd; 3235 u8 tmp8; 3236 3237 args.dev = dev; 3238 args.id = dev->id; 3239 args.cmd = cmd; 3240 args.done = cmd->scsi_done; 3241 3242 switch(scsicmd[0]) { 3243 /* TODO: worth improving? */ 3244 case FORMAT_UNIT: 3245 ata_scsi_invalid_field(cmd); 3246 break; 3247 3248 case INQUIRY: 3249 if (scsicmd[1] & 2) /* is CmdDt set? */ 3250 ata_scsi_invalid_field(cmd); 3251 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 3252 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 3253 else switch (scsicmd[2]) { 3254 case 0x00: 3255 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 3256 break; 3257 case 0x80: 3258 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 3259 break; 3260 case 0x83: 3261 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 3262 break; 3263 case 0x89: 3264 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 3265 break; 3266 case 0xb0: 3267 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 3268 break; 3269 case 0xb1: 3270 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 3271 break; 3272 case 0xb2: 3273 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 3274 break; 3275 default: 3276 ata_scsi_invalid_field(cmd); 3277 break; 3278 } 3279 break; 3280 3281 case MODE_SENSE: 3282 case MODE_SENSE_10: 3283 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 3284 break; 3285 3286 case MODE_SELECT: /* unconditionally return */ 3287 case MODE_SELECT_10: /* bad-field-in-cdb */ 3288 ata_scsi_invalid_field(cmd); 3289 break; 3290 3291 case READ_CAPACITY: 3292 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 3293 break; 3294 3295 case SERVICE_ACTION_IN: 3296 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 3297 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 3298 else 3299 ata_scsi_invalid_field(cmd); 3300 break; 3301 3302 case REPORT_LUNS: 3303 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 3304 break; 3305 3306 case REQUEST_SENSE: 3307 ata_scsi_set_sense(cmd, 0, 0, 0); 3308 cmd->result = (DRIVER_SENSE << 24); 3309 cmd->scsi_done(cmd); 3310 break; 3311 3312 /* if we reach this, then writeback caching is disabled, 3313 * turning this into a no-op. 3314 */ 3315 case SYNCHRONIZE_CACHE: 3316 /* fall through */ 3317 3318 /* no-op's, complete with success */ 3319 case REZERO_UNIT: 3320 case SEEK_6: 3321 case SEEK_10: 3322 case TEST_UNIT_READY: 3323 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 3324 break; 3325 3326 case SEND_DIAGNOSTIC: 3327 tmp8 = scsicmd[1] & ~(1 << 3); 3328 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) 3329 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 3330 else 3331 ata_scsi_invalid_field(cmd); 3332 break; 3333 3334 /* all other commands */ 3335 default: 3336 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); 3337 /* "Invalid command operation code" */ 3338 cmd->scsi_done(cmd); 3339 break; 3340 } 3341 } 3342 3343 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 3344 { 3345 int i, rc; 3346 3347 for (i = 0; i < host->n_ports; i++) { 3348 struct ata_port *ap = host->ports[i]; 3349 struct Scsi_Host *shost; 3350 3351 rc = -ENOMEM; 3352 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 3353 if (!shost) 3354 goto err_alloc; 3355 3356 *(struct ata_port **)&shost->hostdata[0] = ap; 3357 ap->scsi_host = shost; 3358 3359 shost->transportt = ata_scsi_transport_template; 3360 shost->unique_id = ap->print_id; 3361 shost->max_id = 16; 3362 shost->max_lun = 1; 3363 shost->max_channel = 1; 3364 shost->max_cmd_len = 16; 3365 3366 /* Schedule policy is determined by ->qc_defer() 3367 * callback and it needs to see every deferred qc. 3368 * Set host_blocked to 1 to prevent SCSI midlayer from 3369 * automatically deferring requests. 3370 */ 3371 shost->max_host_blocked = 1; 3372 3373 rc = scsi_add_host(ap->scsi_host, ap->host->dev); 3374 if (rc) 3375 goto err_add; 3376 } 3377 3378 return 0; 3379 3380 err_add: 3381 scsi_host_put(host->ports[i]->scsi_host); 3382 err_alloc: 3383 while (--i >= 0) { 3384 struct Scsi_Host *shost = host->ports[i]->scsi_host; 3385 3386 scsi_remove_host(shost); 3387 scsi_host_put(shost); 3388 } 3389 return rc; 3390 } 3391 3392 void ata_scsi_scan_host(struct ata_port *ap, int sync) 3393 { 3394 int tries = 5; 3395 struct ata_device *last_failed_dev = NULL; 3396 struct ata_link *link; 3397 struct ata_device *dev; 3398 3399 repeat: 3400 ata_for_each_link(link, ap, EDGE) { 3401 ata_for_each_dev(dev, link, ENABLED) { 3402 struct scsi_device *sdev; 3403 int channel = 0, id = 0; 3404 3405 if (dev->sdev) 3406 continue; 3407 3408 if (ata_is_host_link(link)) 3409 id = dev->devno; 3410 else 3411 channel = link->pmp; 3412 3413 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 3414 NULL); 3415 if (!IS_ERR(sdev)) { 3416 dev->sdev = sdev; 3417 scsi_device_put(sdev); 3418 } else { 3419 dev->sdev = NULL; 3420 } 3421 } 3422 } 3423 3424 /* If we scanned while EH was in progress or allocation 3425 * failure occurred, scan would have failed silently. Check 3426 * whether all devices are attached. 3427 */ 3428 ata_for_each_link(link, ap, EDGE) { 3429 ata_for_each_dev(dev, link, ENABLED) { 3430 if (!dev->sdev) 3431 goto exit_loop; 3432 } 3433 } 3434 exit_loop: 3435 if (!link) 3436 return; 3437 3438 /* we're missing some SCSI devices */ 3439 if (sync) { 3440 /* If caller requested synchrnous scan && we've made 3441 * any progress, sleep briefly and repeat. 3442 */ 3443 if (dev != last_failed_dev) { 3444 msleep(100); 3445 last_failed_dev = dev; 3446 goto repeat; 3447 } 3448 3449 /* We might be failing to detect boot device, give it 3450 * a few more chances. 3451 */ 3452 if (--tries) { 3453 msleep(100); 3454 goto repeat; 3455 } 3456 3457 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan " 3458 "failed without making any progress,\n" 3459 " switching to async\n"); 3460 } 3461 3462 queue_delayed_work(system_long_wq, &ap->hotplug_task, 3463 round_jiffies_relative(HZ)); 3464 } 3465 3466 /** 3467 * ata_scsi_offline_dev - offline attached SCSI device 3468 * @dev: ATA device to offline attached SCSI device for 3469 * 3470 * This function is called from ata_eh_hotplug() and responsible 3471 * for taking the SCSI device attached to @dev offline. This 3472 * function is called with host lock which protects dev->sdev 3473 * against clearing. 3474 * 3475 * LOCKING: 3476 * spin_lock_irqsave(host lock) 3477 * 3478 * RETURNS: 3479 * 1 if attached SCSI device exists, 0 otherwise. 3480 */ 3481 int ata_scsi_offline_dev(struct ata_device *dev) 3482 { 3483 if (dev->sdev) { 3484 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 3485 return 1; 3486 } 3487 return 0; 3488 } 3489 3490 /** 3491 * ata_scsi_remove_dev - remove attached SCSI device 3492 * @dev: ATA device to remove attached SCSI device for 3493 * 3494 * This function is called from ata_eh_scsi_hotplug() and 3495 * responsible for removing the SCSI device attached to @dev. 3496 * 3497 * LOCKING: 3498 * Kernel thread context (may sleep). 3499 */ 3500 static void ata_scsi_remove_dev(struct ata_device *dev) 3501 { 3502 struct ata_port *ap = dev->link->ap; 3503 struct scsi_device *sdev; 3504 unsigned long flags; 3505 3506 /* Alas, we need to grab scan_mutex to ensure SCSI device 3507 * state doesn't change underneath us and thus 3508 * scsi_device_get() always succeeds. The mutex locking can 3509 * be removed if there is __scsi_device_get() interface which 3510 * increments reference counts regardless of device state. 3511 */ 3512 mutex_lock(&ap->scsi_host->scan_mutex); 3513 spin_lock_irqsave(ap->lock, flags); 3514 3515 /* clearing dev->sdev is protected by host lock */ 3516 sdev = dev->sdev; 3517 dev->sdev = NULL; 3518 3519 if (sdev) { 3520 /* If user initiated unplug races with us, sdev can go 3521 * away underneath us after the host lock and 3522 * scan_mutex are released. Hold onto it. 3523 */ 3524 if (scsi_device_get(sdev) == 0) { 3525 /* The following ensures the attached sdev is 3526 * offline on return from ata_scsi_offline_dev() 3527 * regardless it wins or loses the race 3528 * against this function. 3529 */ 3530 scsi_device_set_state(sdev, SDEV_OFFLINE); 3531 } else { 3532 WARN_ON(1); 3533 sdev = NULL; 3534 } 3535 } 3536 3537 spin_unlock_irqrestore(ap->lock, flags); 3538 mutex_unlock(&ap->scsi_host->scan_mutex); 3539 3540 if (sdev) { 3541 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", 3542 dev_name(&sdev->sdev_gendev)); 3543 3544 scsi_remove_device(sdev); 3545 scsi_device_put(sdev); 3546 } 3547 } 3548 3549 static void ata_scsi_handle_link_detach(struct ata_link *link) 3550 { 3551 struct ata_port *ap = link->ap; 3552 struct ata_device *dev; 3553 3554 ata_for_each_dev(dev, link, ALL) { 3555 unsigned long flags; 3556 3557 if (!(dev->flags & ATA_DFLAG_DETACHED)) 3558 continue; 3559 3560 spin_lock_irqsave(ap->lock, flags); 3561 dev->flags &= ~ATA_DFLAG_DETACHED; 3562 spin_unlock_irqrestore(ap->lock, flags); 3563 3564 ata_scsi_remove_dev(dev); 3565 } 3566 } 3567 3568 /** 3569 * ata_scsi_media_change_notify - send media change event 3570 * @dev: Pointer to the disk device with media change event 3571 * 3572 * Tell the block layer to send a media change notification 3573 * event. 3574 * 3575 * LOCKING: 3576 * spin_lock_irqsave(host lock) 3577 */ 3578 void ata_scsi_media_change_notify(struct ata_device *dev) 3579 { 3580 if (dev->sdev) 3581 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 3582 GFP_ATOMIC); 3583 } 3584 3585 /** 3586 * ata_scsi_hotplug - SCSI part of hotplug 3587 * @work: Pointer to ATA port to perform SCSI hotplug on 3588 * 3589 * Perform SCSI part of hotplug. It's executed from a separate 3590 * workqueue after EH completes. This is necessary because SCSI 3591 * hot plugging requires working EH and hot unplugging is 3592 * synchronized with hot plugging with a mutex. 3593 * 3594 * LOCKING: 3595 * Kernel thread context (may sleep). 3596 */ 3597 void ata_scsi_hotplug(struct work_struct *work) 3598 { 3599 struct ata_port *ap = 3600 container_of(work, struct ata_port, hotplug_task.work); 3601 int i; 3602 3603 if (ap->pflags & ATA_PFLAG_UNLOADING) { 3604 DPRINTK("ENTER/EXIT - unloading\n"); 3605 return; 3606 } 3607 3608 DPRINTK("ENTER\n"); 3609 mutex_lock(&ap->scsi_scan_mutex); 3610 3611 /* Unplug detached devices. We cannot use link iterator here 3612 * because PMP links have to be scanned even if PMP is 3613 * currently not attached. Iterate manually. 3614 */ 3615 ata_scsi_handle_link_detach(&ap->link); 3616 if (ap->pmp_link) 3617 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 3618 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 3619 3620 /* scan for new ones */ 3621 ata_scsi_scan_host(ap, 0); 3622 3623 mutex_unlock(&ap->scsi_scan_mutex); 3624 DPRINTK("EXIT\n"); 3625 } 3626 3627 /** 3628 * ata_scsi_user_scan - indication for user-initiated bus scan 3629 * @shost: SCSI host to scan 3630 * @channel: Channel to scan 3631 * @id: ID to scan 3632 * @lun: LUN to scan 3633 * 3634 * This function is called when user explicitly requests bus 3635 * scan. Set probe pending flag and invoke EH. 3636 * 3637 * LOCKING: 3638 * SCSI layer (we don't care) 3639 * 3640 * RETURNS: 3641 * Zero. 3642 */ 3643 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 3644 unsigned int id, unsigned int lun) 3645 { 3646 struct ata_port *ap = ata_shost_to_port(shost); 3647 unsigned long flags; 3648 int devno, rc = 0; 3649 3650 if (!ap->ops->error_handler) 3651 return -EOPNOTSUPP; 3652 3653 if (lun != SCAN_WILD_CARD && lun) 3654 return -EINVAL; 3655 3656 if (!sata_pmp_attached(ap)) { 3657 if (channel != SCAN_WILD_CARD && channel) 3658 return -EINVAL; 3659 devno = id; 3660 } else { 3661 if (id != SCAN_WILD_CARD && id) 3662 return -EINVAL; 3663 devno = channel; 3664 } 3665 3666 spin_lock_irqsave(ap->lock, flags); 3667 3668 if (devno == SCAN_WILD_CARD) { 3669 struct ata_link *link; 3670 3671 ata_for_each_link(link, ap, EDGE) { 3672 struct ata_eh_info *ehi = &link->eh_info; 3673 ehi->probe_mask |= ATA_ALL_DEVICES; 3674 ehi->action |= ATA_EH_RESET; 3675 } 3676 } else { 3677 struct ata_device *dev = ata_find_dev(ap, devno); 3678 3679 if (dev) { 3680 struct ata_eh_info *ehi = &dev->link->eh_info; 3681 ehi->probe_mask |= 1 << dev->devno; 3682 ehi->action |= ATA_EH_RESET; 3683 } else 3684 rc = -EINVAL; 3685 } 3686 3687 if (rc == 0) { 3688 ata_port_schedule_eh(ap); 3689 spin_unlock_irqrestore(ap->lock, flags); 3690 ata_port_wait_eh(ap); 3691 } else 3692 spin_unlock_irqrestore(ap->lock, flags); 3693 3694 return rc; 3695 } 3696 3697 /** 3698 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 3699 * @work: Pointer to ATA port to perform scsi_rescan_device() 3700 * 3701 * After ATA pass thru (SAT) commands are executed successfully, 3702 * libata need to propagate the changes to SCSI layer. 3703 * 3704 * LOCKING: 3705 * Kernel thread context (may sleep). 3706 */ 3707 void ata_scsi_dev_rescan(struct work_struct *work) 3708 { 3709 struct ata_port *ap = 3710 container_of(work, struct ata_port, scsi_rescan_task); 3711 struct ata_link *link; 3712 struct ata_device *dev; 3713 unsigned long flags; 3714 3715 mutex_lock(&ap->scsi_scan_mutex); 3716 spin_lock_irqsave(ap->lock, flags); 3717 3718 ata_for_each_link(link, ap, EDGE) { 3719 ata_for_each_dev(dev, link, ENABLED) { 3720 struct scsi_device *sdev = dev->sdev; 3721 3722 if (!sdev) 3723 continue; 3724 if (scsi_device_get(sdev)) 3725 continue; 3726 3727 spin_unlock_irqrestore(ap->lock, flags); 3728 scsi_rescan_device(&(sdev->sdev_gendev)); 3729 scsi_device_put(sdev); 3730 spin_lock_irqsave(ap->lock, flags); 3731 } 3732 } 3733 3734 spin_unlock_irqrestore(ap->lock, flags); 3735 mutex_unlock(&ap->scsi_scan_mutex); 3736 } 3737 3738 /** 3739 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 3740 * @host: ATA host container for all SAS ports 3741 * @port_info: Information from low-level host driver 3742 * @shost: SCSI host that the scsi device is attached to 3743 * 3744 * LOCKING: 3745 * PCI/etc. bus probe sem. 3746 * 3747 * RETURNS: 3748 * ata_port pointer on success / NULL on failure. 3749 */ 3750 3751 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 3752 struct ata_port_info *port_info, 3753 struct Scsi_Host *shost) 3754 { 3755 struct ata_port *ap; 3756 3757 ap = ata_port_alloc(host); 3758 if (!ap) 3759 return NULL; 3760 3761 ap->port_no = 0; 3762 ap->lock = shost->host_lock; 3763 ap->pio_mask = port_info->pio_mask; 3764 ap->mwdma_mask = port_info->mwdma_mask; 3765 ap->udma_mask = port_info->udma_mask; 3766 ap->flags |= port_info->flags; 3767 ap->ops = port_info->port_ops; 3768 ap->cbl = ATA_CBL_SATA; 3769 3770 return ap; 3771 } 3772 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 3773 3774 /** 3775 * ata_sas_port_start - Set port up for dma. 3776 * @ap: Port to initialize 3777 * 3778 * Called just after data structures for each port are 3779 * initialized. 3780 * 3781 * May be used as the port_start() entry in ata_port_operations. 3782 * 3783 * LOCKING: 3784 * Inherited from caller. 3785 */ 3786 int ata_sas_port_start(struct ata_port *ap) 3787 { 3788 return 0; 3789 } 3790 EXPORT_SYMBOL_GPL(ata_sas_port_start); 3791 3792 /** 3793 * ata_port_stop - Undo ata_sas_port_start() 3794 * @ap: Port to shut down 3795 * 3796 * May be used as the port_stop() entry in ata_port_operations. 3797 * 3798 * LOCKING: 3799 * Inherited from caller. 3800 */ 3801 3802 void ata_sas_port_stop(struct ata_port *ap) 3803 { 3804 } 3805 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 3806 3807 /** 3808 * ata_sas_port_init - Initialize a SATA device 3809 * @ap: SATA port to initialize 3810 * 3811 * LOCKING: 3812 * PCI/etc. bus probe sem. 3813 * 3814 * RETURNS: 3815 * Zero on success, non-zero on error. 3816 */ 3817 3818 int ata_sas_port_init(struct ata_port *ap) 3819 { 3820 int rc = ap->ops->port_start(ap); 3821 3822 if (!rc) { 3823 ap->print_id = ata_print_id++; 3824 rc = ata_bus_probe(ap); 3825 } 3826 3827 return rc; 3828 } 3829 EXPORT_SYMBOL_GPL(ata_sas_port_init); 3830 3831 /** 3832 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 3833 * @ap: SATA port to destroy 3834 * 3835 */ 3836 3837 void ata_sas_port_destroy(struct ata_port *ap) 3838 { 3839 if (ap->ops->port_stop) 3840 ap->ops->port_stop(ap); 3841 kfree(ap); 3842 } 3843 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 3844 3845 /** 3846 * ata_sas_slave_configure - Default slave_config routine for libata devices 3847 * @sdev: SCSI device to configure 3848 * @ap: ATA port to which SCSI device is attached 3849 * 3850 * RETURNS: 3851 * Zero. 3852 */ 3853 3854 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 3855 { 3856 ata_scsi_sdev_config(sdev); 3857 ata_scsi_dev_config(sdev, ap->link.device); 3858 return 0; 3859 } 3860 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 3861 3862 /** 3863 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 3864 * @cmd: SCSI command to be sent 3865 * @ap: ATA port to which the command is being sent 3866 * 3867 * RETURNS: 3868 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 3869 * 0 otherwise. 3870 */ 3871 3872 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 3873 { 3874 int rc = 0; 3875 3876 ata_scsi_dump_cdb(ap, cmd); 3877 3878 if (likely(ata_dev_enabled(ap->link.device))) 3879 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 3880 else { 3881 cmd->result = (DID_BAD_TARGET << 16); 3882 cmd->scsi_done(cmd); 3883 } 3884 return rc; 3885 } 3886 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 3887