1 /* 2 * libata-scsi.c - helper library for ATA 3 * 4 * Maintained by: Tejun Heo <tj@kernel.org> 5 * Please ALWAYS copy linux-ide@vger.kernel.org 6 * on emails. 7 * 8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 9 * Copyright 2003-2004 Jeff Garzik 10 * 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2, or (at your option) 15 * any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; see the file COPYING. If not, write to 24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 25 * 26 * 27 * libata documentation is available via 'make {ps|pdf}docs', 28 * as Documentation/DocBook/libata.* 29 * 30 * Hardware documentation available from 31 * - http://www.t10.org/ 32 * - http://www.t13.org/ 33 * 34 */ 35 36 #include <linux/slab.h> 37 #include <linux/kernel.h> 38 #include <linux/blkdev.h> 39 #include <linux/spinlock.h> 40 #include <linux/export.h> 41 #include <scsi/scsi.h> 42 #include <scsi/scsi_host.h> 43 #include <scsi/scsi_cmnd.h> 44 #include <scsi/scsi_eh.h> 45 #include <scsi/scsi_device.h> 46 #include <scsi/scsi_tcq.h> 47 #include <scsi/scsi_transport.h> 48 #include <linux/libata.h> 49 #include <linux/hdreg.h> 50 #include <linux/uaccess.h> 51 #include <linux/suspend.h> 52 #include <asm/unaligned.h> 53 54 #include "libata.h" 55 #include "libata-transport.h" 56 57 #define ATA_SCSI_RBUF_SIZE 4096 58 59 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); 60 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; 61 62 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 63 64 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 65 const struct scsi_device *scsidev); 66 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, 67 const struct scsi_device *scsidev); 68 69 #define RW_RECOVERY_MPAGE 0x1 70 #define RW_RECOVERY_MPAGE_LEN 12 71 #define CACHE_MPAGE 0x8 72 #define CACHE_MPAGE_LEN 20 73 #define CONTROL_MPAGE 0xa 74 #define CONTROL_MPAGE_LEN 12 75 #define ALL_MPAGES 0x3f 76 #define ALL_SUB_MPAGES 0xff 77 78 79 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { 80 RW_RECOVERY_MPAGE, 81 RW_RECOVERY_MPAGE_LEN - 2, 82 (1 << 7), /* AWRE */ 83 0, /* read retry count */ 84 0, 0, 0, 0, 85 0, /* write retry count */ 86 0, 0, 0 87 }; 88 89 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 90 CACHE_MPAGE, 91 CACHE_MPAGE_LEN - 2, 92 0, /* contains WCE, needs to be 0 for logic */ 93 0, 0, 0, 0, 0, 0, 0, 0, 0, 94 0, /* contains DRA, needs to be 0 for logic */ 95 0, 0, 0, 0, 0, 0, 0 96 }; 97 98 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 99 CONTROL_MPAGE, 100 CONTROL_MPAGE_LEN - 2, 101 2, /* DSENSE=0, GLTSD=1 */ 102 0, /* [QAM+QERR may be 1, see 05-359r1] */ 103 0, 0, 0, 0, 0xff, 0xff, 104 0, 30 /* extended self test time, see 05-359r1 */ 105 }; 106 107 static const char *ata_lpm_policy_names[] = { 108 [ATA_LPM_UNKNOWN] = "max_performance", 109 [ATA_LPM_MAX_POWER] = "max_performance", 110 [ATA_LPM_MED_POWER] = "medium_power", 111 [ATA_LPM_MIN_POWER] = "min_power", 112 }; 113 114 static ssize_t ata_scsi_lpm_store(struct device *device, 115 struct device_attribute *attr, 116 const char *buf, size_t count) 117 { 118 struct Scsi_Host *shost = class_to_shost(device); 119 struct ata_port *ap = ata_shost_to_port(shost); 120 struct ata_link *link; 121 struct ata_device *dev; 122 enum ata_lpm_policy policy; 123 unsigned long flags; 124 125 /* UNKNOWN is internal state, iterate from MAX_POWER */ 126 for (policy = ATA_LPM_MAX_POWER; 127 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) { 128 const char *name = ata_lpm_policy_names[policy]; 129 130 if (strncmp(name, buf, strlen(name)) == 0) 131 break; 132 } 133 if (policy == ARRAY_SIZE(ata_lpm_policy_names)) 134 return -EINVAL; 135 136 spin_lock_irqsave(ap->lock, flags); 137 138 ata_for_each_link(link, ap, EDGE) { 139 ata_for_each_dev(dev, &ap->link, ENABLED) { 140 if (dev->horkage & ATA_HORKAGE_NOLPM) { 141 count = -EOPNOTSUPP; 142 goto out_unlock; 143 } 144 } 145 } 146 147 ap->target_lpm_policy = policy; 148 ata_port_schedule_eh(ap); 149 out_unlock: 150 spin_unlock_irqrestore(ap->lock, flags); 151 return count; 152 } 153 154 static ssize_t ata_scsi_lpm_show(struct device *dev, 155 struct device_attribute *attr, char *buf) 156 { 157 struct Scsi_Host *shost = class_to_shost(dev); 158 struct ata_port *ap = ata_shost_to_port(shost); 159 160 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names)) 161 return -EINVAL; 162 163 return snprintf(buf, PAGE_SIZE, "%s\n", 164 ata_lpm_policy_names[ap->target_lpm_policy]); 165 } 166 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, 167 ata_scsi_lpm_show, ata_scsi_lpm_store); 168 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); 169 170 static ssize_t ata_scsi_park_show(struct device *device, 171 struct device_attribute *attr, char *buf) 172 { 173 struct scsi_device *sdev = to_scsi_device(device); 174 struct ata_port *ap; 175 struct ata_link *link; 176 struct ata_device *dev; 177 unsigned long now; 178 unsigned int uninitialized_var(msecs); 179 int rc = 0; 180 181 ap = ata_shost_to_port(sdev->host); 182 183 spin_lock_irq(ap->lock); 184 dev = ata_scsi_find_dev(ap, sdev); 185 if (!dev) { 186 rc = -ENODEV; 187 goto unlock; 188 } 189 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 190 rc = -EOPNOTSUPP; 191 goto unlock; 192 } 193 194 link = dev->link; 195 now = jiffies; 196 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS && 197 link->eh_context.unloaded_mask & (1 << dev->devno) && 198 time_after(dev->unpark_deadline, now)) 199 msecs = jiffies_to_msecs(dev->unpark_deadline - now); 200 else 201 msecs = 0; 202 203 unlock: 204 spin_unlock_irq(ap->lock); 205 206 return rc ? rc : snprintf(buf, 20, "%u\n", msecs); 207 } 208 209 static ssize_t ata_scsi_park_store(struct device *device, 210 struct device_attribute *attr, 211 const char *buf, size_t len) 212 { 213 struct scsi_device *sdev = to_scsi_device(device); 214 struct ata_port *ap; 215 struct ata_device *dev; 216 long int input; 217 unsigned long flags; 218 int rc; 219 220 rc = kstrtol(buf, 10, &input); 221 if (rc) 222 return rc; 223 if (input < -2) 224 return -EINVAL; 225 if (input > ATA_TMOUT_MAX_PARK) { 226 rc = -EOVERFLOW; 227 input = ATA_TMOUT_MAX_PARK; 228 } 229 230 ap = ata_shost_to_port(sdev->host); 231 232 spin_lock_irqsave(ap->lock, flags); 233 dev = ata_scsi_find_dev(ap, sdev); 234 if (unlikely(!dev)) { 235 rc = -ENODEV; 236 goto unlock; 237 } 238 if (dev->class != ATA_DEV_ATA && 239 dev->class != ATA_DEV_ZAC) { 240 rc = -EOPNOTSUPP; 241 goto unlock; 242 } 243 244 if (input >= 0) { 245 if (dev->flags & ATA_DFLAG_NO_UNLOAD) { 246 rc = -EOPNOTSUPP; 247 goto unlock; 248 } 249 250 dev->unpark_deadline = ata_deadline(jiffies, input); 251 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK; 252 ata_port_schedule_eh(ap); 253 complete(&ap->park_req_pending); 254 } else { 255 switch (input) { 256 case -1: 257 dev->flags &= ~ATA_DFLAG_NO_UNLOAD; 258 break; 259 case -2: 260 dev->flags |= ATA_DFLAG_NO_UNLOAD; 261 break; 262 } 263 } 264 unlock: 265 spin_unlock_irqrestore(ap->lock, flags); 266 267 return rc ? rc : len; 268 } 269 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, 270 ata_scsi_park_show, ata_scsi_park_store); 271 EXPORT_SYMBOL_GPL(dev_attr_unload_heads); 272 273 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, 274 u8 sk, u8 asc, u8 ascq) 275 { 276 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 277 278 if (!cmd) 279 return; 280 281 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 282 283 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq); 284 } 285 286 void ata_scsi_set_sense_information(struct ata_device *dev, 287 struct scsi_cmnd *cmd, 288 const struct ata_taskfile *tf) 289 { 290 u64 information; 291 292 if (!cmd) 293 return; 294 295 information = ata_tf_read_block(tf, dev); 296 if (information == U64_MAX) 297 return; 298 299 scsi_set_sense_information(cmd->sense_buffer, 300 SCSI_SENSE_BUFFERSIZE, information); 301 } 302 303 static void ata_scsi_set_invalid_field(struct ata_device *dev, 304 struct scsi_cmnd *cmd, u16 field, u8 bit) 305 { 306 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0); 307 /* "Invalid field in cbd" */ 308 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 309 field, bit, 1); 310 } 311 312 static void ata_scsi_set_invalid_parameter(struct ata_device *dev, 313 struct scsi_cmnd *cmd, u16 field) 314 { 315 /* "Invalid field in parameter list" */ 316 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0); 317 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 318 field, 0xff, 0); 319 } 320 321 static ssize_t 322 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, 323 const char *buf, size_t count) 324 { 325 struct Scsi_Host *shost = class_to_shost(dev); 326 struct ata_port *ap = ata_shost_to_port(shost); 327 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) 328 return ap->ops->em_store(ap, buf, count); 329 return -EINVAL; 330 } 331 332 static ssize_t 333 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, 334 char *buf) 335 { 336 struct Scsi_Host *shost = class_to_shost(dev); 337 struct ata_port *ap = ata_shost_to_port(shost); 338 339 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) 340 return ap->ops->em_show(ap, buf); 341 return -EINVAL; 342 } 343 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, 344 ata_scsi_em_message_show, ata_scsi_em_message_store); 345 EXPORT_SYMBOL_GPL(dev_attr_em_message); 346 347 static ssize_t 348 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, 349 char *buf) 350 { 351 struct Scsi_Host *shost = class_to_shost(dev); 352 struct ata_port *ap = ata_shost_to_port(shost); 353 354 return snprintf(buf, 23, "%d\n", ap->em_message_type); 355 } 356 DEVICE_ATTR(em_message_type, S_IRUGO, 357 ata_scsi_em_message_type_show, NULL); 358 EXPORT_SYMBOL_GPL(dev_attr_em_message_type); 359 360 static ssize_t 361 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, 362 char *buf) 363 { 364 struct scsi_device *sdev = to_scsi_device(dev); 365 struct ata_port *ap = ata_shost_to_port(sdev->host); 366 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 367 368 if (atadev && ap->ops->sw_activity_show && 369 (ap->flags & ATA_FLAG_SW_ACTIVITY)) 370 return ap->ops->sw_activity_show(atadev, buf); 371 return -EINVAL; 372 } 373 374 static ssize_t 375 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, 376 const char *buf, size_t count) 377 { 378 struct scsi_device *sdev = to_scsi_device(dev); 379 struct ata_port *ap = ata_shost_to_port(sdev->host); 380 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); 381 enum sw_activity val; 382 int rc; 383 384 if (atadev && ap->ops->sw_activity_store && 385 (ap->flags & ATA_FLAG_SW_ACTIVITY)) { 386 val = simple_strtoul(buf, NULL, 0); 387 switch (val) { 388 case OFF: case BLINK_ON: case BLINK_OFF: 389 rc = ap->ops->sw_activity_store(atadev, val); 390 if (!rc) 391 return count; 392 else 393 return rc; 394 } 395 } 396 return -EINVAL; 397 } 398 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, 399 ata_scsi_activity_store); 400 EXPORT_SYMBOL_GPL(dev_attr_sw_activity); 401 402 struct device_attribute *ata_common_sdev_attrs[] = { 403 &dev_attr_unload_heads, 404 NULL 405 }; 406 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); 407 408 static void ata_scsi_invalid_field(struct ata_device *dev, 409 struct scsi_cmnd *cmd, u16 field) 410 { 411 ata_scsi_set_invalid_field(dev, cmd, field, 0xff); 412 cmd->scsi_done(cmd); 413 } 414 415 /** 416 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 417 * @sdev: SCSI device for which BIOS geometry is to be determined 418 * @bdev: block device associated with @sdev 419 * @capacity: capacity of SCSI device 420 * @geom: location to which geometry will be output 421 * 422 * Generic bios head/sector/cylinder calculator 423 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 424 * mapping. Some situations may arise where the disk is not 425 * bootable if this is not used. 426 * 427 * LOCKING: 428 * Defined by the SCSI layer. We don't really care. 429 * 430 * RETURNS: 431 * Zero. 432 */ 433 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 434 sector_t capacity, int geom[]) 435 { 436 geom[0] = 255; 437 geom[1] = 63; 438 sector_div(capacity, 255*63); 439 geom[2] = capacity; 440 441 return 0; 442 } 443 444 /** 445 * ata_scsi_unlock_native_capacity - unlock native capacity 446 * @sdev: SCSI device to adjust device capacity for 447 * 448 * This function is called if a partition on @sdev extends beyond 449 * the end of the device. It requests EH to unlock HPA. 450 * 451 * LOCKING: 452 * Defined by the SCSI layer. Might sleep. 453 */ 454 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) 455 { 456 struct ata_port *ap = ata_shost_to_port(sdev->host); 457 struct ata_device *dev; 458 unsigned long flags; 459 460 spin_lock_irqsave(ap->lock, flags); 461 462 dev = ata_scsi_find_dev(ap, sdev); 463 if (dev && dev->n_sectors < dev->n_native_sectors) { 464 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 465 dev->link->eh_info.action |= ATA_EH_RESET; 466 ata_port_schedule_eh(ap); 467 } 468 469 spin_unlock_irqrestore(ap->lock, flags); 470 ata_port_wait_eh(ap); 471 } 472 473 /** 474 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl 475 * @ap: target port 476 * @sdev: SCSI device to get identify data for 477 * @arg: User buffer area for identify data 478 * 479 * LOCKING: 480 * Defined by the SCSI layer. We don't really care. 481 * 482 * RETURNS: 483 * Zero on success, negative errno on error. 484 */ 485 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev, 486 void __user *arg) 487 { 488 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 489 u16 __user *dst = arg; 490 char buf[40]; 491 492 if (!dev) 493 return -ENOMSG; 494 495 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16))) 496 return -EFAULT; 497 498 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN); 499 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN)) 500 return -EFAULT; 501 502 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN); 503 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN)) 504 return -EFAULT; 505 506 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN); 507 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN)) 508 return -EFAULT; 509 510 return 0; 511 } 512 513 /** 514 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 515 * @scsidev: Device to which we are issuing command 516 * @arg: User provided data for issuing command 517 * 518 * LOCKING: 519 * Defined by the SCSI layer. We don't really care. 520 * 521 * RETURNS: 522 * Zero on success, negative errno on error. 523 */ 524 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 525 { 526 int rc = 0; 527 u8 scsi_cmd[MAX_COMMAND_SIZE]; 528 u8 args[4], *argbuf = NULL, *sensebuf = NULL; 529 int argsize = 0; 530 enum dma_data_direction data_dir; 531 int cmd_result; 532 533 if (arg == NULL) 534 return -EINVAL; 535 536 if (copy_from_user(args, arg, sizeof(args))) 537 return -EFAULT; 538 539 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 540 if (!sensebuf) 541 return -ENOMEM; 542 543 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 544 545 if (args[3]) { 546 argsize = ATA_SECT_SIZE * args[3]; 547 argbuf = kmalloc(argsize, GFP_KERNEL); 548 if (argbuf == NULL) { 549 rc = -ENOMEM; 550 goto error; 551 } 552 553 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 554 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 555 block count in sector count field */ 556 data_dir = DMA_FROM_DEVICE; 557 } else { 558 scsi_cmd[1] = (3 << 1); /* Non-data */ 559 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 560 data_dir = DMA_NONE; 561 } 562 563 scsi_cmd[0] = ATA_16; 564 565 scsi_cmd[4] = args[2]; 566 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */ 567 scsi_cmd[6] = args[3]; 568 scsi_cmd[8] = args[1]; 569 scsi_cmd[10] = 0x4f; 570 scsi_cmd[12] = 0xc2; 571 } else { 572 scsi_cmd[6] = args[1]; 573 } 574 scsi_cmd[14] = args[0]; 575 576 /* Good values for timeout and retries? Values below 577 from scsi_ioctl_send_command() for default case... */ 578 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 579 sensebuf, (10*HZ), 5, 0, NULL); 580 581 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 582 u8 *desc = sensebuf + 8; 583 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 584 585 /* If we set cc then ATA pass-through will cause a 586 * check condition even if no error. Filter that. */ 587 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 588 struct scsi_sense_hdr sshdr; 589 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 590 &sshdr); 591 if (sshdr.sense_key == RECOVERED_ERROR && 592 sshdr.asc == 0 && sshdr.ascq == 0x1d) 593 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 594 } 595 596 /* Send userspace a few ATA registers (same as drivers/ide) */ 597 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 598 desc[0] == 0x09) { /* code is "ATA Descriptor" */ 599 args[0] = desc[13]; /* status */ 600 args[1] = desc[3]; /* error */ 601 args[2] = desc[5]; /* sector count (0:7) */ 602 if (copy_to_user(arg, args, sizeof(args))) 603 rc = -EFAULT; 604 } 605 } 606 607 608 if (cmd_result) { 609 rc = -EIO; 610 goto error; 611 } 612 613 if ((argbuf) 614 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 615 rc = -EFAULT; 616 error: 617 kfree(sensebuf); 618 kfree(argbuf); 619 return rc; 620 } 621 622 /** 623 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 624 * @scsidev: Device to which we are issuing command 625 * @arg: User provided data for issuing command 626 * 627 * LOCKING: 628 * Defined by the SCSI layer. We don't really care. 629 * 630 * RETURNS: 631 * Zero on success, negative errno on error. 632 */ 633 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 634 { 635 int rc = 0; 636 u8 scsi_cmd[MAX_COMMAND_SIZE]; 637 u8 args[7], *sensebuf = NULL; 638 int cmd_result; 639 640 if (arg == NULL) 641 return -EINVAL; 642 643 if (copy_from_user(args, arg, sizeof(args))) 644 return -EFAULT; 645 646 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 647 if (!sensebuf) 648 return -ENOMEM; 649 650 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 651 scsi_cmd[0] = ATA_16; 652 scsi_cmd[1] = (3 << 1); /* Non-data */ 653 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 654 scsi_cmd[4] = args[1]; 655 scsi_cmd[6] = args[2]; 656 scsi_cmd[8] = args[3]; 657 scsi_cmd[10] = args[4]; 658 scsi_cmd[12] = args[5]; 659 scsi_cmd[13] = args[6] & 0x4f; 660 scsi_cmd[14] = args[0]; 661 662 /* Good values for timeout and retries? Values below 663 from scsi_ioctl_send_command() for default case... */ 664 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 665 sensebuf, (10*HZ), 5, 0, NULL); 666 667 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 668 u8 *desc = sensebuf + 8; 669 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 670 671 /* If we set cc then ATA pass-through will cause a 672 * check condition even if no error. Filter that. */ 673 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 674 struct scsi_sense_hdr sshdr; 675 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 676 &sshdr); 677 if (sshdr.sense_key == RECOVERED_ERROR && 678 sshdr.asc == 0 && sshdr.ascq == 0x1d) 679 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 680 } 681 682 /* Send userspace ATA registers */ 683 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 684 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 685 args[0] = desc[13]; /* status */ 686 args[1] = desc[3]; /* error */ 687 args[2] = desc[5]; /* sector count (0:7) */ 688 args[3] = desc[7]; /* lbal */ 689 args[4] = desc[9]; /* lbam */ 690 args[5] = desc[11]; /* lbah */ 691 args[6] = desc[12]; /* select */ 692 if (copy_to_user(arg, args, sizeof(args))) 693 rc = -EFAULT; 694 } 695 } 696 697 if (cmd_result) { 698 rc = -EIO; 699 goto error; 700 } 701 702 error: 703 kfree(sensebuf); 704 return rc; 705 } 706 707 static int ata_ioc32(struct ata_port *ap) 708 { 709 if (ap->flags & ATA_FLAG_PIO_DMA) 710 return 1; 711 if (ap->pflags & ATA_PFLAG_PIO32) 712 return 1; 713 return 0; 714 } 715 716 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, 717 int cmd, void __user *arg) 718 { 719 unsigned long val; 720 int rc = -EINVAL; 721 unsigned long flags; 722 723 switch (cmd) { 724 case HDIO_GET_32BIT: 725 spin_lock_irqsave(ap->lock, flags); 726 val = ata_ioc32(ap); 727 spin_unlock_irqrestore(ap->lock, flags); 728 return put_user(val, (unsigned long __user *)arg); 729 730 case HDIO_SET_32BIT: 731 val = (unsigned long) arg; 732 rc = 0; 733 spin_lock_irqsave(ap->lock, flags); 734 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) { 735 if (val) 736 ap->pflags |= ATA_PFLAG_PIO32; 737 else 738 ap->pflags &= ~ATA_PFLAG_PIO32; 739 } else { 740 if (val != ata_ioc32(ap)) 741 rc = -EINVAL; 742 } 743 spin_unlock_irqrestore(ap->lock, flags); 744 return rc; 745 746 case HDIO_GET_IDENTITY: 747 return ata_get_identity(ap, scsidev, arg); 748 749 case HDIO_DRIVE_CMD: 750 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 751 return -EACCES; 752 return ata_cmd_ioctl(scsidev, arg); 753 754 case HDIO_DRIVE_TASK: 755 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 756 return -EACCES; 757 return ata_task_ioctl(scsidev, arg); 758 759 default: 760 rc = -ENOTTY; 761 break; 762 } 763 764 return rc; 765 } 766 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); 767 768 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) 769 { 770 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), 771 scsidev, cmd, arg); 772 } 773 EXPORT_SYMBOL_GPL(ata_scsi_ioctl); 774 775 /** 776 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 777 * @dev: ATA device to which the new command is attached 778 * @cmd: SCSI command that originated this ATA command 779 * 780 * Obtain a reference to an unused ata_queued_cmd structure, 781 * which is the basic libata structure representing a single 782 * ATA command sent to the hardware. 783 * 784 * If a command was available, fill in the SCSI-specific 785 * portions of the structure with information on the 786 * current command. 787 * 788 * LOCKING: 789 * spin_lock_irqsave(host lock) 790 * 791 * RETURNS: 792 * Command allocated, or %NULL if none available. 793 */ 794 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 795 struct scsi_cmnd *cmd) 796 { 797 struct ata_queued_cmd *qc; 798 799 qc = ata_qc_new_init(dev, cmd->request->tag); 800 if (qc) { 801 qc->scsicmd = cmd; 802 qc->scsidone = cmd->scsi_done; 803 804 qc->sg = scsi_sglist(cmd); 805 qc->n_elem = scsi_sg_count(cmd); 806 } else { 807 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 808 cmd->scsi_done(cmd); 809 } 810 811 return qc; 812 } 813 814 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) 815 { 816 struct scsi_cmnd *scmd = qc->scsicmd; 817 818 qc->extrabytes = scmd->request->extra_len; 819 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; 820 } 821 822 /** 823 * ata_dump_status - user friendly display of error info 824 * @id: id of the port in question 825 * @tf: ptr to filled out taskfile 826 * 827 * Decode and dump the ATA error/status registers for the user so 828 * that they have some idea what really happened at the non 829 * make-believe layer. 830 * 831 * LOCKING: 832 * inherited from caller 833 */ 834 static void ata_dump_status(unsigned id, struct ata_taskfile *tf) 835 { 836 u8 stat = tf->command, err = tf->feature; 837 838 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); 839 if (stat & ATA_BUSY) { 840 printk("Busy }\n"); /* Data is not valid in this case */ 841 } else { 842 if (stat & ATA_DRDY) printk("DriveReady "); 843 if (stat & ATA_DF) printk("DeviceFault "); 844 if (stat & ATA_DSC) printk("SeekComplete "); 845 if (stat & ATA_DRQ) printk("DataRequest "); 846 if (stat & ATA_CORR) printk("CorrectedError "); 847 if (stat & ATA_SENSE) printk("Sense "); 848 if (stat & ATA_ERR) printk("Error "); 849 printk("}\n"); 850 851 if (err) { 852 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); 853 if (err & ATA_ABORTED) printk("DriveStatusError "); 854 if (err & ATA_ICRC) { 855 if (err & ATA_ABORTED) 856 printk("BadCRC "); 857 else printk("Sector "); 858 } 859 if (err & ATA_UNC) printk("UncorrectableError "); 860 if (err & ATA_IDNF) printk("SectorIdNotFound "); 861 if (err & ATA_TRK0NF) printk("TrackZeroNotFound "); 862 if (err & ATA_AMNF) printk("AddrMarkNotFound "); 863 printk("}\n"); 864 } 865 } 866 } 867 868 /** 869 * ata_to_sense_error - convert ATA error to SCSI error 870 * @id: ATA device number 871 * @drv_stat: value contained in ATA status register 872 * @drv_err: value contained in ATA error register 873 * @sk: the sense key we'll fill out 874 * @asc: the additional sense code we'll fill out 875 * @ascq: the additional sense code qualifier we'll fill out 876 * @verbose: be verbose 877 * 878 * Converts an ATA error into a SCSI error. Fill out pointers to 879 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 880 * format sense blocks. 881 * 882 * LOCKING: 883 * spin_lock_irqsave(host lock) 884 */ 885 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, 886 u8 *asc, u8 *ascq, int verbose) 887 { 888 int i; 889 890 /* Based on the 3ware driver translation table */ 891 static const unsigned char sense_table[][4] = { 892 /* BBD|ECC|ID|MAR */ 893 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, 894 // Device busy Aborted command 895 /* BBD|ECC|ID */ 896 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, 897 // Device busy Aborted command 898 /* ECC|MC|MARK */ 899 {0x61, HARDWARE_ERROR, 0x00, 0x00}, 900 // Device fault Hardware error 901 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 902 {0x84, ABORTED_COMMAND, 0x47, 0x00}, 903 // Data CRC error SCSI parity error 904 /* MC|ID|ABRT|TRK0|MARK */ 905 {0x37, NOT_READY, 0x04, 0x00}, 906 // Unit offline Not ready 907 /* MCR|MARK */ 908 {0x09, NOT_READY, 0x04, 0x00}, 909 // Unrecovered disk error Not ready 910 /* Bad address mark */ 911 {0x01, MEDIUM_ERROR, 0x13, 0x00}, 912 // Address mark not found for data field 913 /* TRK0 - Track 0 not found */ 914 {0x02, HARDWARE_ERROR, 0x00, 0x00}, 915 // Hardware error 916 /* Abort: 0x04 is not translated here, see below */ 917 /* Media change request */ 918 {0x08, NOT_READY, 0x04, 0x00}, 919 // FIXME: faking offline 920 /* SRV/IDNF - ID not found */ 921 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, 922 // Logical address out of range 923 /* MC - Media Changed */ 924 {0x20, UNIT_ATTENTION, 0x28, 0x00}, 925 // Not ready to ready change, medium may have changed 926 /* ECC - Uncorrectable ECC error */ 927 {0x40, MEDIUM_ERROR, 0x11, 0x04}, 928 // Unrecovered read error 929 /* BBD - block marked bad */ 930 {0x80, MEDIUM_ERROR, 0x11, 0x04}, 931 // Block marked bad Medium error, unrecovered read error 932 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 933 }; 934 static const unsigned char stat_table[][4] = { 935 /* Must be first because BUSY means no other bits valid */ 936 {0x80, ABORTED_COMMAND, 0x47, 0x00}, 937 // Busy, fake parity for now 938 {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, 939 // Device ready, unaligned write command 940 {0x20, HARDWARE_ERROR, 0x44, 0x00}, 941 // Device fault, internal target failure 942 {0x08, ABORTED_COMMAND, 0x47, 0x00}, 943 // Timed out in xfer, fake parity for now 944 {0x04, RECOVERED_ERROR, 0x11, 0x00}, 945 // Recovered ECC error Medium error, recovered 946 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 947 }; 948 949 /* 950 * Is this an error we can process/parse 951 */ 952 if (drv_stat & ATA_BUSY) { 953 drv_err = 0; /* Ignore the err bits, they're invalid */ 954 } 955 956 if (drv_err) { 957 /* Look for drv_err */ 958 for (i = 0; sense_table[i][0] != 0xFF; i++) { 959 /* Look for best matches first */ 960 if ((sense_table[i][0] & drv_err) == 961 sense_table[i][0]) { 962 *sk = sense_table[i][1]; 963 *asc = sense_table[i][2]; 964 *ascq = sense_table[i][3]; 965 goto translate_done; 966 } 967 } 968 } 969 970 /* 971 * Fall back to interpreting status bits. Note that if the drv_err 972 * has only the ABRT bit set, we decode drv_stat. ABRT by itself 973 * is not descriptive enough. 974 */ 975 for (i = 0; stat_table[i][0] != 0xFF; i++) { 976 if (stat_table[i][0] & drv_stat) { 977 *sk = stat_table[i][1]; 978 *asc = stat_table[i][2]; 979 *ascq = stat_table[i][3]; 980 goto translate_done; 981 } 982 } 983 984 /* 985 * We need a sensible error return here, which is tricky, and one 986 * that won't cause people to do things like return a disk wrongly. 987 */ 988 *sk = ABORTED_COMMAND; 989 *asc = 0x00; 990 *ascq = 0x00; 991 992 translate_done: 993 if (verbose) 994 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " 995 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 996 id, drv_stat, drv_err, *sk, *asc, *ascq); 997 return; 998 } 999 1000 /* 1001 * ata_gen_passthru_sense - Generate check condition sense block. 1002 * @qc: Command that completed. 1003 * 1004 * This function is specific to the ATA descriptor format sense 1005 * block specified for the ATA pass through commands. Regardless 1006 * of whether the command errored or not, return a sense 1007 * block. Copy all controller registers into the sense 1008 * block. If there was no error, we get the request from an ATA 1009 * passthrough command, so we use the following sense data: 1010 * sk = RECOVERED ERROR 1011 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1012 * 1013 * 1014 * LOCKING: 1015 * None. 1016 */ 1017 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 1018 { 1019 struct scsi_cmnd *cmd = qc->scsicmd; 1020 struct ata_taskfile *tf = &qc->result_tf; 1021 unsigned char *sb = cmd->sense_buffer; 1022 unsigned char *desc = sb + 8; 1023 int verbose = qc->ap->ops->error_handler == NULL; 1024 u8 sense_key, asc, ascq; 1025 1026 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1027 1028 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1029 1030 /* 1031 * Use ata_to_sense_error() to map status register bits 1032 * onto sense key, asc & ascq. 1033 */ 1034 if (qc->err_mask || 1035 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1036 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1037 &sense_key, &asc, &ascq, verbose); 1038 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); 1039 } else { 1040 /* 1041 * ATA PASS-THROUGH INFORMATION AVAILABLE 1042 * Always in descriptor format sense. 1043 */ 1044 scsi_build_sense_buffer(1, cmd->sense_buffer, 1045 RECOVERED_ERROR, 0, 0x1D); 1046 } 1047 1048 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { 1049 u8 len; 1050 1051 /* descriptor format */ 1052 len = sb[7]; 1053 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); 1054 if (!desc) { 1055 if (SCSI_SENSE_BUFFERSIZE < len + 14) 1056 return; 1057 sb[7] = len + 14; 1058 desc = sb + 8 + len; 1059 } 1060 desc[0] = 9; 1061 desc[1] = 12; 1062 /* 1063 * Copy registers into sense buffer. 1064 */ 1065 desc[2] = 0x00; 1066 desc[3] = tf->feature; /* == error reg */ 1067 desc[5] = tf->nsect; 1068 desc[7] = tf->lbal; 1069 desc[9] = tf->lbam; 1070 desc[11] = tf->lbah; 1071 desc[12] = tf->device; 1072 desc[13] = tf->command; /* == status reg */ 1073 1074 /* 1075 * Fill in Extend bit, and the high order bytes 1076 * if applicable. 1077 */ 1078 if (tf->flags & ATA_TFLAG_LBA48) { 1079 desc[2] |= 0x01; 1080 desc[4] = tf->hob_nsect; 1081 desc[6] = tf->hob_lbal; 1082 desc[8] = tf->hob_lbam; 1083 desc[10] = tf->hob_lbah; 1084 } 1085 } else { 1086 /* Fixed sense format */ 1087 desc[0] = tf->feature; 1088 desc[1] = tf->command; /* status */ 1089 desc[2] = tf->device; 1090 desc[3] = tf->nsect; 1091 desc[0] = 0; 1092 if (tf->flags & ATA_TFLAG_LBA48) { 1093 desc[8] |= 0x80; 1094 if (tf->hob_nsect) 1095 desc[8] |= 0x40; 1096 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 1097 desc[8] |= 0x20; 1098 } 1099 desc[9] = tf->lbal; 1100 desc[10] = tf->lbam; 1101 desc[11] = tf->lbah; 1102 } 1103 } 1104 1105 /** 1106 * ata_gen_ata_sense - generate a SCSI fixed sense block 1107 * @qc: Command that we are erroring out 1108 * 1109 * Generate sense block for a failed ATA command @qc. Descriptor 1110 * format is used to accommodate LBA48 block address. 1111 * 1112 * LOCKING: 1113 * None. 1114 */ 1115 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 1116 { 1117 struct ata_device *dev = qc->dev; 1118 struct scsi_cmnd *cmd = qc->scsicmd; 1119 struct ata_taskfile *tf = &qc->result_tf; 1120 unsigned char *sb = cmd->sense_buffer; 1121 int verbose = qc->ap->ops->error_handler == NULL; 1122 u64 block; 1123 u8 sense_key, asc, ascq; 1124 1125 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1126 1127 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1128 1129 if (ata_dev_disabled(dev)) { 1130 /* Device disabled after error recovery */ 1131 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 1132 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 1133 return; 1134 } 1135 /* Use ata_to_sense_error() to map status register bits 1136 * onto sense key, asc & ascq. 1137 */ 1138 if (qc->err_mask || 1139 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1140 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1141 &sense_key, &asc, &ascq, verbose); 1142 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1143 } else { 1144 /* Could not decode error */ 1145 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1146 tf->command, qc->err_mask); 1147 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1148 return; 1149 } 1150 1151 block = ata_tf_read_block(&qc->result_tf, dev); 1152 if (block == U64_MAX) 1153 return; 1154 1155 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1156 } 1157 1158 static void ata_scsi_sdev_config(struct scsi_device *sdev) 1159 { 1160 sdev->use_10_for_rw = 1; 1161 sdev->use_10_for_ms = 1; 1162 sdev->no_report_opcodes = 1; 1163 sdev->no_write_same = 1; 1164 1165 /* Schedule policy is determined by ->qc_defer() callback and 1166 * it needs to see every deferred qc. Set dev_blocked to 1 to 1167 * prevent SCSI midlayer from automatically deferring 1168 * requests. 1169 */ 1170 sdev->max_device_blocked = 1; 1171 } 1172 1173 /** 1174 * atapi_drain_needed - Check whether data transfer may overflow 1175 * @rq: request to be checked 1176 * 1177 * ATAPI commands which transfer variable length data to host 1178 * might overflow due to application error or hardware bug. This 1179 * function checks whether overflow should be drained and ignored 1180 * for @request. 1181 * 1182 * LOCKING: 1183 * None. 1184 * 1185 * RETURNS: 1186 * 1 if ; otherwise, 0. 1187 */ 1188 static int atapi_drain_needed(struct request *rq) 1189 { 1190 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC)) 1191 return 0; 1192 1193 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE)) 1194 return 0; 1195 1196 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; 1197 } 1198 1199 static int ata_scsi_dev_config(struct scsi_device *sdev, 1200 struct ata_device *dev) 1201 { 1202 struct request_queue *q = sdev->request_queue; 1203 1204 if (!ata_id_has_unload(dev->id)) 1205 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1206 1207 /* configure max sectors */ 1208 blk_queue_max_hw_sectors(q, dev->max_sectors); 1209 1210 if (dev->class == ATA_DEV_ATAPI) { 1211 void *buf; 1212 1213 sdev->sector_size = ATA_SECT_SIZE; 1214 1215 /* set DMA padding */ 1216 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1217 1218 /* configure draining */ 1219 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1220 if (!buf) { 1221 ata_dev_err(dev, "drain buffer allocation failed\n"); 1222 return -ENOMEM; 1223 } 1224 1225 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1226 } else { 1227 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1228 sdev->manage_start_stop = 1; 1229 } 1230 1231 /* 1232 * ata_pio_sectors() expects buffer for each sector to not cross 1233 * page boundary. Enforce it by requiring buffers to be sector 1234 * aligned, which works iff sector_size is not larger than 1235 * PAGE_SIZE. ATAPI devices also need the alignment as 1236 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1237 */ 1238 if (sdev->sector_size > PAGE_SIZE) 1239 ata_dev_warn(dev, 1240 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1241 sdev->sector_size); 1242 1243 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1244 1245 if (dev->flags & ATA_DFLAG_AN) 1246 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1247 1248 if (dev->flags & ATA_DFLAG_NCQ) { 1249 int depth; 1250 1251 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1252 depth = min(ATA_MAX_QUEUE - 1, depth); 1253 scsi_change_queue_depth(sdev, depth); 1254 } 1255 1256 blk_queue_flush_queueable(q, false); 1257 1258 dev->sdev = sdev; 1259 return 0; 1260 } 1261 1262 /** 1263 * ata_scsi_slave_config - Set SCSI device attributes 1264 * @sdev: SCSI device to examine 1265 * 1266 * This is called before we actually start reading 1267 * and writing to the device, to configure certain 1268 * SCSI mid-layer behaviors. 1269 * 1270 * LOCKING: 1271 * Defined by SCSI layer. We don't really care. 1272 */ 1273 1274 int ata_scsi_slave_config(struct scsi_device *sdev) 1275 { 1276 struct ata_port *ap = ata_shost_to_port(sdev->host); 1277 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1278 int rc = 0; 1279 1280 ata_scsi_sdev_config(sdev); 1281 1282 if (dev) 1283 rc = ata_scsi_dev_config(sdev, dev); 1284 1285 return rc; 1286 } 1287 1288 /** 1289 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1290 * @sdev: SCSI device to be destroyed 1291 * 1292 * @sdev is about to be destroyed for hot/warm unplugging. If 1293 * this unplugging was initiated by libata as indicated by NULL 1294 * dev->sdev, this function doesn't have to do anything. 1295 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1296 * Clear dev->sdev, schedule the device for ATA detach and invoke 1297 * EH. 1298 * 1299 * LOCKING: 1300 * Defined by SCSI layer. We don't really care. 1301 */ 1302 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1303 { 1304 struct ata_port *ap = ata_shost_to_port(sdev->host); 1305 struct request_queue *q = sdev->request_queue; 1306 unsigned long flags; 1307 struct ata_device *dev; 1308 1309 if (!ap->ops->error_handler) 1310 return; 1311 1312 spin_lock_irqsave(ap->lock, flags); 1313 dev = __ata_scsi_find_dev(ap, sdev); 1314 if (dev && dev->sdev) { 1315 /* SCSI device already in CANCEL state, no need to offline it */ 1316 dev->sdev = NULL; 1317 dev->flags |= ATA_DFLAG_DETACH; 1318 ata_port_schedule_eh(ap); 1319 } 1320 spin_unlock_irqrestore(ap->lock, flags); 1321 1322 kfree(q->dma_drain_buffer); 1323 q->dma_drain_buffer = NULL; 1324 q->dma_drain_size = 0; 1325 } 1326 1327 /** 1328 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth 1329 * @ap: ATA port to which the device change the queue depth 1330 * @sdev: SCSI device to configure queue depth for 1331 * @queue_depth: new queue depth 1332 * 1333 * libsas and libata have different approaches for associating a sdev to 1334 * its ata_port. 1335 * 1336 */ 1337 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1338 int queue_depth) 1339 { 1340 struct ata_device *dev; 1341 unsigned long flags; 1342 1343 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1344 return sdev->queue_depth; 1345 1346 dev = ata_scsi_find_dev(ap, sdev); 1347 if (!dev || !ata_dev_enabled(dev)) 1348 return sdev->queue_depth; 1349 1350 /* NCQ enabled? */ 1351 spin_lock_irqsave(ap->lock, flags); 1352 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1353 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1354 dev->flags |= ATA_DFLAG_NCQ_OFF; 1355 queue_depth = 1; 1356 } 1357 spin_unlock_irqrestore(ap->lock, flags); 1358 1359 /* limit and apply queue depth */ 1360 queue_depth = min(queue_depth, sdev->host->can_queue); 1361 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1362 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); 1363 1364 if (sdev->queue_depth == queue_depth) 1365 return -EINVAL; 1366 1367 return scsi_change_queue_depth(sdev, queue_depth); 1368 } 1369 1370 /** 1371 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1372 * @sdev: SCSI device to configure queue depth for 1373 * @queue_depth: new queue depth 1374 * 1375 * This is libata standard hostt->change_queue_depth callback. 1376 * SCSI will call into this callback when user tries to set queue 1377 * depth via sysfs. 1378 * 1379 * LOCKING: 1380 * SCSI layer (we don't care) 1381 * 1382 * RETURNS: 1383 * Newly configured queue depth. 1384 */ 1385 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) 1386 { 1387 struct ata_port *ap = ata_shost_to_port(sdev->host); 1388 1389 return __ata_change_queue_depth(ap, sdev, queue_depth); 1390 } 1391 1392 /** 1393 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1394 * @qc: Storage for translated ATA taskfile 1395 * 1396 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1397 * (to start). Perhaps these commands should be preceded by 1398 * CHECK POWER MODE to see what power mode the device is already in. 1399 * [See SAT revision 5 at www.t10.org] 1400 * 1401 * LOCKING: 1402 * spin_lock_irqsave(host lock) 1403 * 1404 * RETURNS: 1405 * Zero on success, non-zero on error. 1406 */ 1407 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1408 { 1409 struct scsi_cmnd *scmd = qc->scsicmd; 1410 struct ata_taskfile *tf = &qc->tf; 1411 const u8 *cdb = scmd->cmnd; 1412 u16 fp; 1413 u8 bp = 0xff; 1414 1415 if (scmd->cmd_len < 5) { 1416 fp = 4; 1417 goto invalid_fld; 1418 } 1419 1420 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1421 tf->protocol = ATA_PROT_NODATA; 1422 if (cdb[1] & 0x1) { 1423 ; /* ignore IMMED bit, violates sat-r05 */ 1424 } 1425 if (cdb[4] & 0x2) { 1426 fp = 4; 1427 bp = 1; 1428 goto invalid_fld; /* LOEJ bit set not supported */ 1429 } 1430 if (((cdb[4] >> 4) & 0xf) != 0) { 1431 fp = 4; 1432 bp = 3; 1433 goto invalid_fld; /* power conditions not supported */ 1434 } 1435 1436 if (cdb[4] & 0x1) { 1437 tf->nsect = 1; /* 1 sector, lba=0 */ 1438 1439 if (qc->dev->flags & ATA_DFLAG_LBA) { 1440 tf->flags |= ATA_TFLAG_LBA; 1441 1442 tf->lbah = 0x0; 1443 tf->lbam = 0x0; 1444 tf->lbal = 0x0; 1445 tf->device |= ATA_LBA; 1446 } else { 1447 /* CHS */ 1448 tf->lbal = 0x1; /* sect */ 1449 tf->lbam = 0x0; /* cyl low */ 1450 tf->lbah = 0x0; /* cyl high */ 1451 } 1452 1453 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1454 } else { 1455 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1456 * or S5) causing some drives to spin up and down again. 1457 */ 1458 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1459 system_state == SYSTEM_POWER_OFF) 1460 goto skip; 1461 1462 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1463 system_entering_hibernation()) 1464 goto skip; 1465 1466 /* Issue ATA STANDBY IMMEDIATE command */ 1467 tf->command = ATA_CMD_STANDBYNOW1; 1468 } 1469 1470 /* 1471 * Standby and Idle condition timers could be implemented but that 1472 * would require libata to implement the Power condition mode page 1473 * and allow the user to change it. Changing mode pages requires 1474 * MODE SELECT to be implemented. 1475 */ 1476 1477 return 0; 1478 1479 invalid_fld: 1480 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1481 return 1; 1482 skip: 1483 scmd->result = SAM_STAT_GOOD; 1484 return 1; 1485 } 1486 1487 1488 /** 1489 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1490 * @qc: Storage for translated ATA taskfile 1491 * 1492 * Sets up an ATA taskfile to issue FLUSH CACHE or 1493 * FLUSH CACHE EXT. 1494 * 1495 * LOCKING: 1496 * spin_lock_irqsave(host lock) 1497 * 1498 * RETURNS: 1499 * Zero on success, non-zero on error. 1500 */ 1501 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1502 { 1503 struct ata_taskfile *tf = &qc->tf; 1504 1505 tf->flags |= ATA_TFLAG_DEVICE; 1506 tf->protocol = ATA_PROT_NODATA; 1507 1508 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1509 tf->command = ATA_CMD_FLUSH_EXT; 1510 else 1511 tf->command = ATA_CMD_FLUSH; 1512 1513 /* flush is critical for IO integrity, consider it an IO command */ 1514 qc->flags |= ATA_QCFLAG_IO; 1515 1516 return 0; 1517 } 1518 1519 /** 1520 * scsi_6_lba_len - Get LBA and transfer length 1521 * @cdb: SCSI command to translate 1522 * 1523 * Calculate LBA and transfer length for 6-byte commands. 1524 * 1525 * RETURNS: 1526 * @plba: the LBA 1527 * @plen: the transfer length 1528 */ 1529 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1530 { 1531 u64 lba = 0; 1532 u32 len; 1533 1534 VPRINTK("six-byte command\n"); 1535 1536 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1537 lba |= ((u64)cdb[2]) << 8; 1538 lba |= ((u64)cdb[3]); 1539 1540 len = cdb[4]; 1541 1542 *plba = lba; 1543 *plen = len; 1544 } 1545 1546 /** 1547 * scsi_10_lba_len - Get LBA and transfer length 1548 * @cdb: SCSI command to translate 1549 * 1550 * Calculate LBA and transfer length for 10-byte commands. 1551 * 1552 * RETURNS: 1553 * @plba: the LBA 1554 * @plen: the transfer length 1555 */ 1556 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1557 { 1558 u64 lba = 0; 1559 u32 len = 0; 1560 1561 VPRINTK("ten-byte command\n"); 1562 1563 lba |= ((u64)cdb[2]) << 24; 1564 lba |= ((u64)cdb[3]) << 16; 1565 lba |= ((u64)cdb[4]) << 8; 1566 lba |= ((u64)cdb[5]); 1567 1568 len |= ((u32)cdb[7]) << 8; 1569 len |= ((u32)cdb[8]); 1570 1571 *plba = lba; 1572 *plen = len; 1573 } 1574 1575 /** 1576 * scsi_16_lba_len - Get LBA and transfer length 1577 * @cdb: SCSI command to translate 1578 * 1579 * Calculate LBA and transfer length for 16-byte commands. 1580 * 1581 * RETURNS: 1582 * @plba: the LBA 1583 * @plen: the transfer length 1584 */ 1585 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1586 { 1587 u64 lba = 0; 1588 u32 len = 0; 1589 1590 VPRINTK("sixteen-byte command\n"); 1591 1592 lba |= ((u64)cdb[2]) << 56; 1593 lba |= ((u64)cdb[3]) << 48; 1594 lba |= ((u64)cdb[4]) << 40; 1595 lba |= ((u64)cdb[5]) << 32; 1596 lba |= ((u64)cdb[6]) << 24; 1597 lba |= ((u64)cdb[7]) << 16; 1598 lba |= ((u64)cdb[8]) << 8; 1599 lba |= ((u64)cdb[9]); 1600 1601 len |= ((u32)cdb[10]) << 24; 1602 len |= ((u32)cdb[11]) << 16; 1603 len |= ((u32)cdb[12]) << 8; 1604 len |= ((u32)cdb[13]); 1605 1606 *plba = lba; 1607 *plen = len; 1608 } 1609 1610 /** 1611 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1612 * @qc: Storage for translated ATA taskfile 1613 * 1614 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1615 * 1616 * LOCKING: 1617 * spin_lock_irqsave(host lock) 1618 * 1619 * RETURNS: 1620 * Zero on success, non-zero on error. 1621 */ 1622 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1623 { 1624 struct scsi_cmnd *scmd = qc->scsicmd; 1625 struct ata_taskfile *tf = &qc->tf; 1626 struct ata_device *dev = qc->dev; 1627 u64 dev_sectors = qc->dev->n_sectors; 1628 const u8 *cdb = scmd->cmnd; 1629 u64 block; 1630 u32 n_block; 1631 u16 fp; 1632 1633 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1634 tf->protocol = ATA_PROT_NODATA; 1635 1636 if (cdb[0] == VERIFY) { 1637 if (scmd->cmd_len < 10) { 1638 fp = 9; 1639 goto invalid_fld; 1640 } 1641 scsi_10_lba_len(cdb, &block, &n_block); 1642 } else if (cdb[0] == VERIFY_16) { 1643 if (scmd->cmd_len < 16) { 1644 fp = 15; 1645 goto invalid_fld; 1646 } 1647 scsi_16_lba_len(cdb, &block, &n_block); 1648 } else { 1649 fp = 0; 1650 goto invalid_fld; 1651 } 1652 1653 if (!n_block) 1654 goto nothing_to_do; 1655 if (block >= dev_sectors) 1656 goto out_of_range; 1657 if ((block + n_block) > dev_sectors) 1658 goto out_of_range; 1659 1660 if (dev->flags & ATA_DFLAG_LBA) { 1661 tf->flags |= ATA_TFLAG_LBA; 1662 1663 if (lba_28_ok(block, n_block)) { 1664 /* use LBA28 */ 1665 tf->command = ATA_CMD_VERIFY; 1666 tf->device |= (block >> 24) & 0xf; 1667 } else if (lba_48_ok(block, n_block)) { 1668 if (!(dev->flags & ATA_DFLAG_LBA48)) 1669 goto out_of_range; 1670 1671 /* use LBA48 */ 1672 tf->flags |= ATA_TFLAG_LBA48; 1673 tf->command = ATA_CMD_VERIFY_EXT; 1674 1675 tf->hob_nsect = (n_block >> 8) & 0xff; 1676 1677 tf->hob_lbah = (block >> 40) & 0xff; 1678 tf->hob_lbam = (block >> 32) & 0xff; 1679 tf->hob_lbal = (block >> 24) & 0xff; 1680 } else 1681 /* request too large even for LBA48 */ 1682 goto out_of_range; 1683 1684 tf->nsect = n_block & 0xff; 1685 1686 tf->lbah = (block >> 16) & 0xff; 1687 tf->lbam = (block >> 8) & 0xff; 1688 tf->lbal = block & 0xff; 1689 1690 tf->device |= ATA_LBA; 1691 } else { 1692 /* CHS */ 1693 u32 sect, head, cyl, track; 1694 1695 if (!lba_28_ok(block, n_block)) 1696 goto out_of_range; 1697 1698 /* Convert LBA to CHS */ 1699 track = (u32)block / dev->sectors; 1700 cyl = track / dev->heads; 1701 head = track % dev->heads; 1702 sect = (u32)block % dev->sectors + 1; 1703 1704 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1705 (u32)block, track, cyl, head, sect); 1706 1707 /* Check whether the converted CHS can fit. 1708 Cylinder: 0-65535 1709 Head: 0-15 1710 Sector: 1-255*/ 1711 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1712 goto out_of_range; 1713 1714 tf->command = ATA_CMD_VERIFY; 1715 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1716 tf->lbal = sect; 1717 tf->lbam = cyl; 1718 tf->lbah = cyl >> 8; 1719 tf->device |= head; 1720 } 1721 1722 return 0; 1723 1724 invalid_fld: 1725 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1726 return 1; 1727 1728 out_of_range: 1729 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1730 /* "Logical Block Address out of range" */ 1731 return 1; 1732 1733 nothing_to_do: 1734 scmd->result = SAM_STAT_GOOD; 1735 return 1; 1736 } 1737 1738 /** 1739 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1740 * @qc: Storage for translated ATA taskfile 1741 * 1742 * Converts any of six SCSI read/write commands into the 1743 * ATA counterpart, including starting sector (LBA), 1744 * sector count, and taking into account the device's LBA48 1745 * support. 1746 * 1747 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1748 * %WRITE_16 are currently supported. 1749 * 1750 * LOCKING: 1751 * spin_lock_irqsave(host lock) 1752 * 1753 * RETURNS: 1754 * Zero on success, non-zero on error. 1755 */ 1756 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1757 { 1758 struct scsi_cmnd *scmd = qc->scsicmd; 1759 const u8 *cdb = scmd->cmnd; 1760 unsigned int tf_flags = 0; 1761 u64 block; 1762 u32 n_block; 1763 int rc; 1764 u16 fp = 0; 1765 1766 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1767 tf_flags |= ATA_TFLAG_WRITE; 1768 1769 /* Calculate the SCSI LBA, transfer length and FUA. */ 1770 switch (cdb[0]) { 1771 case READ_10: 1772 case WRITE_10: 1773 if (unlikely(scmd->cmd_len < 10)) { 1774 fp = 9; 1775 goto invalid_fld; 1776 } 1777 scsi_10_lba_len(cdb, &block, &n_block); 1778 if (cdb[1] & (1 << 3)) 1779 tf_flags |= ATA_TFLAG_FUA; 1780 break; 1781 case READ_6: 1782 case WRITE_6: 1783 if (unlikely(scmd->cmd_len < 6)) { 1784 fp = 5; 1785 goto invalid_fld; 1786 } 1787 scsi_6_lba_len(cdb, &block, &n_block); 1788 1789 /* for 6-byte r/w commands, transfer length 0 1790 * means 256 blocks of data, not 0 block. 1791 */ 1792 if (!n_block) 1793 n_block = 256; 1794 break; 1795 case READ_16: 1796 case WRITE_16: 1797 if (unlikely(scmd->cmd_len < 16)) { 1798 fp = 15; 1799 goto invalid_fld; 1800 } 1801 scsi_16_lba_len(cdb, &block, &n_block); 1802 if (cdb[1] & (1 << 3)) 1803 tf_flags |= ATA_TFLAG_FUA; 1804 break; 1805 default: 1806 DPRINTK("no-byte command\n"); 1807 fp = 0; 1808 goto invalid_fld; 1809 } 1810 1811 /* Check and compose ATA command */ 1812 if (!n_block) 1813 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1814 * length 0 means transfer 0 block of data. 1815 * However, for ATA R/W commands, sector count 0 means 1816 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1817 * 1818 * WARNING: one or two older ATA drives treat 0 as 0... 1819 */ 1820 goto nothing_to_do; 1821 1822 qc->flags |= ATA_QCFLAG_IO; 1823 qc->nbytes = n_block * scmd->device->sector_size; 1824 1825 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1826 qc->tag); 1827 if (likely(rc == 0)) 1828 return 0; 1829 1830 if (rc == -ERANGE) 1831 goto out_of_range; 1832 /* treat all other errors as -EINVAL, fall through */ 1833 invalid_fld: 1834 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1835 return 1; 1836 1837 out_of_range: 1838 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1839 /* "Logical Block Address out of range" */ 1840 return 1; 1841 1842 nothing_to_do: 1843 scmd->result = SAM_STAT_GOOD; 1844 return 1; 1845 } 1846 1847 static void ata_qc_done(struct ata_queued_cmd *qc) 1848 { 1849 struct scsi_cmnd *cmd = qc->scsicmd; 1850 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1851 1852 ata_qc_free(qc); 1853 done(cmd); 1854 } 1855 1856 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1857 { 1858 struct ata_port *ap = qc->ap; 1859 struct scsi_cmnd *cmd = qc->scsicmd; 1860 u8 *cdb = cmd->cmnd; 1861 int need_sense = (qc->err_mask != 0); 1862 1863 /* For ATA pass thru (SAT) commands, generate a sense block if 1864 * user mandated it or if there's an error. Note that if we 1865 * generate because the user forced us to [CK_COND =1], a check 1866 * condition is generated and the ATA register values are returned 1867 * whether the command completed successfully or not. If there 1868 * was no error, we use the following sense data: 1869 * sk = RECOVERED ERROR 1870 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1871 */ 1872 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1873 ((cdb[2] & 0x20) || need_sense)) 1874 ata_gen_passthru_sense(qc); 1875 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1876 cmd->result = SAM_STAT_CHECK_CONDITION; 1877 else if (need_sense) 1878 ata_gen_ata_sense(qc); 1879 else 1880 cmd->result = SAM_STAT_GOOD; 1881 1882 if (need_sense && !ap->ops->error_handler) 1883 ata_dump_status(ap->print_id, &qc->result_tf); 1884 1885 ata_qc_done(qc); 1886 } 1887 1888 /** 1889 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1890 * @dev: ATA device to which the command is addressed 1891 * @cmd: SCSI command to execute 1892 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1893 * 1894 * Our ->queuecommand() function has decided that the SCSI 1895 * command issued can be directly translated into an ATA 1896 * command, rather than handled internally. 1897 * 1898 * This function sets up an ata_queued_cmd structure for the 1899 * SCSI command, and sends that ata_queued_cmd to the hardware. 1900 * 1901 * The xlat_func argument (actor) returns 0 if ready to execute 1902 * ATA command, else 1 to finish translation. If 1 is returned 1903 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1904 * to be set reflecting an error condition or clean (early) 1905 * termination. 1906 * 1907 * LOCKING: 1908 * spin_lock_irqsave(host lock) 1909 * 1910 * RETURNS: 1911 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1912 * needs to be deferred. 1913 */ 1914 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1915 ata_xlat_func_t xlat_func) 1916 { 1917 struct ata_port *ap = dev->link->ap; 1918 struct ata_queued_cmd *qc; 1919 int rc; 1920 1921 VPRINTK("ENTER\n"); 1922 1923 qc = ata_scsi_qc_new(dev, cmd); 1924 if (!qc) 1925 goto err_mem; 1926 1927 /* data is present; dma-map it */ 1928 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1929 cmd->sc_data_direction == DMA_TO_DEVICE) { 1930 if (unlikely(scsi_bufflen(cmd) < 1)) { 1931 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1932 goto err_did; 1933 } 1934 1935 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1936 1937 qc->dma_dir = cmd->sc_data_direction; 1938 } 1939 1940 qc->complete_fn = ata_scsi_qc_complete; 1941 1942 if (xlat_func(qc)) 1943 goto early_finish; 1944 1945 if (ap->ops->qc_defer) { 1946 if ((rc = ap->ops->qc_defer(qc))) 1947 goto defer; 1948 } 1949 1950 /* select device, send command to hardware */ 1951 ata_qc_issue(qc); 1952 1953 VPRINTK("EXIT\n"); 1954 return 0; 1955 1956 early_finish: 1957 ata_qc_free(qc); 1958 cmd->scsi_done(cmd); 1959 DPRINTK("EXIT - early finish (good or error)\n"); 1960 return 0; 1961 1962 err_did: 1963 ata_qc_free(qc); 1964 cmd->result = (DID_ERROR << 16); 1965 cmd->scsi_done(cmd); 1966 err_mem: 1967 DPRINTK("EXIT - internal\n"); 1968 return 0; 1969 1970 defer: 1971 ata_qc_free(qc); 1972 DPRINTK("EXIT - defer\n"); 1973 if (rc == ATA_DEFER_LINK) 1974 return SCSI_MLQUEUE_DEVICE_BUSY; 1975 else 1976 return SCSI_MLQUEUE_HOST_BUSY; 1977 } 1978 1979 /** 1980 * ata_scsi_rbuf_get - Map response buffer. 1981 * @cmd: SCSI command containing buffer to be mapped. 1982 * @flags: unsigned long variable to store irq enable status 1983 * @copy_in: copy in from user buffer 1984 * 1985 * Prepare buffer for simulated SCSI commands. 1986 * 1987 * LOCKING: 1988 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 1989 * 1990 * RETURNS: 1991 * Pointer to response buffer. 1992 */ 1993 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 1994 unsigned long *flags) 1995 { 1996 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 1997 1998 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1999 if (copy_in) 2000 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2001 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2002 return ata_scsi_rbuf; 2003 } 2004 2005 /** 2006 * ata_scsi_rbuf_put - Unmap response buffer. 2007 * @cmd: SCSI command containing buffer to be unmapped. 2008 * @copy_out: copy out result 2009 * @flags: @flags passed to ata_scsi_rbuf_get() 2010 * 2011 * Returns rbuf buffer. The result is copied to @cmd's buffer if 2012 * @copy_back is true. 2013 * 2014 * LOCKING: 2015 * Unlocks ata_scsi_rbuf_lock. 2016 */ 2017 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 2018 unsigned long *flags) 2019 { 2020 if (copy_out) 2021 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2022 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2023 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 2024 } 2025 2026 /** 2027 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 2028 * @args: device IDENTIFY data / SCSI command of interest. 2029 * @actor: Callback hook for desired SCSI command simulator 2030 * 2031 * Takes care of the hard work of simulating a SCSI command... 2032 * Mapping the response buffer, calling the command's handler, 2033 * and handling the handler's return value. This return value 2034 * indicates whether the handler wishes the SCSI command to be 2035 * completed successfully (0), or not (in which case cmd->result 2036 * and sense buffer are assumed to be set). 2037 * 2038 * LOCKING: 2039 * spin_lock_irqsave(host lock) 2040 */ 2041 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 2042 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 2043 { 2044 u8 *rbuf; 2045 unsigned int rc; 2046 struct scsi_cmnd *cmd = args->cmd; 2047 unsigned long flags; 2048 2049 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 2050 rc = actor(args, rbuf); 2051 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 2052 2053 if (rc == 0) 2054 cmd->result = SAM_STAT_GOOD; 2055 args->done(cmd); 2056 } 2057 2058 /** 2059 * ata_scsiop_inq_std - Simulate INQUIRY command 2060 * @args: device IDENTIFY data / SCSI command of interest. 2061 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2062 * 2063 * Returns standard device identification data associated 2064 * with non-VPD INQUIRY command output. 2065 * 2066 * LOCKING: 2067 * spin_lock_irqsave(host lock) 2068 */ 2069 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 2070 { 2071 const u8 versions[] = { 2072 0x00, 2073 0x60, /* SAM-3 (no version claimed) */ 2074 2075 0x03, 2076 0x20, /* SBC-2 (no version claimed) */ 2077 2078 0x02, 2079 0x60 /* SPC-3 (no version claimed) */ 2080 }; 2081 const u8 versions_zbc[] = { 2082 0x00, 2083 0xA0, /* SAM-5 (no version claimed) */ 2084 2085 0x06, 2086 0x00, /* SBC-4 (no version claimed) */ 2087 2088 0x05, 2089 0xC0, /* SPC-5 (no version claimed) */ 2090 2091 0x60, 2092 0x24, /* ZBC r05 */ 2093 }; 2094 2095 u8 hdr[] = { 2096 TYPE_DISK, 2097 0, 2098 0x5, /* claim SPC-3 version compatibility */ 2099 2, 2100 95 - 4 2101 }; 2102 2103 VPRINTK("ENTER\n"); 2104 2105 /* set scsi removable (RMB) bit per ata bit, or if the 2106 * AHCI port says it's external (Hotplug-capable, eSATA). 2107 */ 2108 if (ata_id_removable(args->id) || 2109 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 2110 hdr[1] |= (1 << 7); 2111 2112 if (args->dev->class == ATA_DEV_ZAC) 2113 hdr[0] = TYPE_ZBC; 2114 2115 memcpy(rbuf, hdr, sizeof(hdr)); 2116 memcpy(&rbuf[8], "ATA ", 8); 2117 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 2118 2119 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2120 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2121 if (strncmp(&rbuf[32], " ", 4) == 0) 2122 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2123 2124 if (rbuf[32] == 0 || rbuf[32] == ' ') 2125 memcpy(&rbuf[32], "n/a ", 4); 2126 2127 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 2128 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2129 else 2130 memcpy(rbuf + 58, versions, sizeof(versions)); 2131 2132 return 0; 2133 } 2134 2135 /** 2136 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2137 * @args: device IDENTIFY data / SCSI command of interest. 2138 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2139 * 2140 * Returns list of inquiry VPD pages available. 2141 * 2142 * LOCKING: 2143 * spin_lock_irqsave(host lock) 2144 */ 2145 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 2146 { 2147 int num_pages; 2148 const u8 pages[] = { 2149 0x00, /* page 0x00, this page */ 2150 0x80, /* page 0x80, unit serial no page */ 2151 0x83, /* page 0x83, device ident page */ 2152 0x89, /* page 0x89, ata info page */ 2153 0xb0, /* page 0xb0, block limits page */ 2154 0xb1, /* page 0xb1, block device characteristics page */ 2155 0xb2, /* page 0xb2, thin provisioning page */ 2156 0xb6, /* page 0xb6, zoned block device characteristics */ 2157 }; 2158 2159 num_pages = sizeof(pages); 2160 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 2161 num_pages--; 2162 rbuf[3] = num_pages; /* number of supported VPD pages */ 2163 memcpy(rbuf + 4, pages, num_pages); 2164 return 0; 2165 } 2166 2167 /** 2168 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2169 * @args: device IDENTIFY data / SCSI command of interest. 2170 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2171 * 2172 * Returns ATA device serial number. 2173 * 2174 * LOCKING: 2175 * spin_lock_irqsave(host lock) 2176 */ 2177 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2178 { 2179 const u8 hdr[] = { 2180 0, 2181 0x80, /* this page code */ 2182 0, 2183 ATA_ID_SERNO_LEN, /* page len */ 2184 }; 2185 2186 memcpy(rbuf, hdr, sizeof(hdr)); 2187 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2188 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2189 return 0; 2190 } 2191 2192 /** 2193 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2194 * @args: device IDENTIFY data / SCSI command of interest. 2195 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2196 * 2197 * Yields two logical unit device identification designators: 2198 * - vendor specific ASCII containing the ATA serial number 2199 * - SAT defined "t10 vendor id based" containing ASCII vendor 2200 * name ("ATA "), model and serial numbers. 2201 * 2202 * LOCKING: 2203 * spin_lock_irqsave(host lock) 2204 */ 2205 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2206 { 2207 const int sat_model_serial_desc_len = 68; 2208 int num; 2209 2210 rbuf[1] = 0x83; /* this page code */ 2211 num = 4; 2212 2213 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2214 rbuf[num + 0] = 2; 2215 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2216 num += 4; 2217 ata_id_string(args->id, (unsigned char *) rbuf + num, 2218 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2219 num += ATA_ID_SERNO_LEN; 2220 2221 /* SAT defined lu model and serial numbers descriptor */ 2222 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2223 rbuf[num + 0] = 2; 2224 rbuf[num + 1] = 1; 2225 rbuf[num + 3] = sat_model_serial_desc_len; 2226 num += 4; 2227 memcpy(rbuf + num, "ATA ", 8); 2228 num += 8; 2229 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2230 ATA_ID_PROD_LEN); 2231 num += ATA_ID_PROD_LEN; 2232 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2233 ATA_ID_SERNO_LEN); 2234 num += ATA_ID_SERNO_LEN; 2235 2236 if (ata_id_has_wwn(args->id)) { 2237 /* SAT defined lu world wide name */ 2238 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2239 rbuf[num + 0] = 1; 2240 rbuf[num + 1] = 3; 2241 rbuf[num + 3] = ATA_ID_WWN_LEN; 2242 num += 4; 2243 ata_id_string(args->id, (unsigned char *) rbuf + num, 2244 ATA_ID_WWN, ATA_ID_WWN_LEN); 2245 num += ATA_ID_WWN_LEN; 2246 } 2247 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2248 return 0; 2249 } 2250 2251 /** 2252 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2253 * @args: device IDENTIFY data / SCSI command of interest. 2254 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2255 * 2256 * Yields SAT-specified ATA VPD page. 2257 * 2258 * LOCKING: 2259 * spin_lock_irqsave(host lock) 2260 */ 2261 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2262 { 2263 struct ata_taskfile tf; 2264 2265 memset(&tf, 0, sizeof(tf)); 2266 2267 rbuf[1] = 0x89; /* our page code */ 2268 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2269 rbuf[3] = (0x238 & 0xff); 2270 2271 memcpy(&rbuf[8], "linux ", 8); 2272 memcpy(&rbuf[16], "libata ", 16); 2273 memcpy(&rbuf[32], DRV_VERSION, 4); 2274 2275 /* we don't store the ATA device signature, so we fake it */ 2276 2277 tf.command = ATA_DRDY; /* really, this is Status reg */ 2278 tf.lbal = 0x1; 2279 tf.nsect = 0x1; 2280 2281 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2282 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2283 2284 rbuf[56] = ATA_CMD_ID_ATA; 2285 2286 memcpy(&rbuf[60], &args->id[0], 512); 2287 return 0; 2288 } 2289 2290 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2291 { 2292 u16 min_io_sectors; 2293 2294 rbuf[1] = 0xb0; 2295 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2296 2297 /* 2298 * Optimal transfer length granularity. 2299 * 2300 * This is always one physical block, but for disks with a smaller 2301 * logical than physical sector size we need to figure out what the 2302 * latter is. 2303 */ 2304 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2305 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2306 2307 /* 2308 * Optimal unmap granularity. 2309 * 2310 * The ATA spec doesn't even know about a granularity or alignment 2311 * for the TRIM command. We can leave away most of the unmap related 2312 * VPD page entries, but we have specifify a granularity to signal 2313 * that we support some form of unmap - in thise case via WRITE SAME 2314 * with the unmap bit set. 2315 */ 2316 if (ata_id_has_trim(args->id)) { 2317 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]); 2318 put_unaligned_be32(1, &rbuf[28]); 2319 } 2320 2321 return 0; 2322 } 2323 2324 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2325 { 2326 int form_factor = ata_id_form_factor(args->id); 2327 int media_rotation_rate = ata_id_rotation_rate(args->id); 2328 u8 zoned = ata_id_zoned_cap(args->id); 2329 2330 rbuf[1] = 0xb1; 2331 rbuf[3] = 0x3c; 2332 rbuf[4] = media_rotation_rate >> 8; 2333 rbuf[5] = media_rotation_rate; 2334 rbuf[7] = form_factor; 2335 if (zoned) 2336 rbuf[8] = (zoned << 4); 2337 2338 return 0; 2339 } 2340 2341 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2342 { 2343 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2344 rbuf[1] = 0xb2; 2345 rbuf[3] = 0x4; 2346 rbuf[5] = 1 << 6; /* TPWS */ 2347 2348 return 0; 2349 } 2350 2351 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2352 { 2353 /* 2354 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2355 */ 2356 rbuf[1] = 0xb6; 2357 rbuf[3] = 0x3C; 2358 2359 /* 2360 * URSWRZ bit is only meaningful for host-managed ZAC drives 2361 */ 2362 if (args->dev->zac_zoned_cap & 1) 2363 rbuf[4] |= 1; 2364 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2365 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2366 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2367 2368 return 0; 2369 } 2370 2371 /** 2372 * ata_scsiop_noop - Command handler that simply returns success. 2373 * @args: device IDENTIFY data / SCSI command of interest. 2374 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2375 * 2376 * No operation. Simply returns success to caller, to indicate 2377 * that the caller should successfully complete this SCSI command. 2378 * 2379 * LOCKING: 2380 * spin_lock_irqsave(host lock) 2381 */ 2382 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) 2383 { 2384 VPRINTK("ENTER\n"); 2385 return 0; 2386 } 2387 2388 /** 2389 * modecpy - Prepare response for MODE SENSE 2390 * @dest: output buffer 2391 * @src: data being copied 2392 * @n: length of mode page 2393 * @changeable: whether changeable parameters are requested 2394 * 2395 * Generate a generic MODE SENSE page for either current or changeable 2396 * parameters. 2397 * 2398 * LOCKING: 2399 * None. 2400 */ 2401 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2402 { 2403 if (changeable) { 2404 memcpy(dest, src, 2); 2405 memset(dest + 2, 0, n - 2); 2406 } else { 2407 memcpy(dest, src, n); 2408 } 2409 } 2410 2411 /** 2412 * ata_msense_caching - Simulate MODE SENSE caching info page 2413 * @id: device IDENTIFY data 2414 * @buf: output buffer 2415 * @changeable: whether changeable parameters are requested 2416 * 2417 * Generate a caching info page, which conditionally indicates 2418 * write caching to the SCSI layer, depending on device 2419 * capabilities. 2420 * 2421 * LOCKING: 2422 * None. 2423 */ 2424 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2425 { 2426 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2427 if (changeable || ata_id_wcache_enabled(id)) 2428 buf[2] |= (1 << 2); /* write cache enable */ 2429 if (!changeable && !ata_id_rahead_enabled(id)) 2430 buf[12] |= (1 << 5); /* disable read ahead */ 2431 return sizeof(def_cache_mpage); 2432 } 2433 2434 /** 2435 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page 2436 * @dev: ATA device of interest 2437 * @buf: output buffer 2438 * @changeable: whether changeable parameters are requested 2439 * 2440 * Generate a generic MODE SENSE control mode page. 2441 * 2442 * LOCKING: 2443 * None. 2444 */ 2445 static unsigned int ata_msense_ctl_mode(struct ata_device *dev, u8 *buf, 2446 bool changeable) 2447 { 2448 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2449 if (changeable && (dev->flags & ATA_DFLAG_D_SENSE)) 2450 buf[2] |= (1 << 2); /* Descriptor sense requested */ 2451 return sizeof(def_control_mpage); 2452 } 2453 2454 /** 2455 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2456 * @buf: output buffer 2457 * @changeable: whether changeable parameters are requested 2458 * 2459 * Generate a generic MODE SENSE r/w error recovery page. 2460 * 2461 * LOCKING: 2462 * None. 2463 */ 2464 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2465 { 2466 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2467 changeable); 2468 return sizeof(def_rw_recovery_mpage); 2469 } 2470 2471 /* 2472 * We can turn this into a real blacklist if it's needed, for now just 2473 * blacklist any Maxtor BANC1G10 revision firmware 2474 */ 2475 static int ata_dev_supports_fua(u16 *id) 2476 { 2477 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2478 2479 if (!libata_fua) 2480 return 0; 2481 if (!ata_id_has_fua(id)) 2482 return 0; 2483 2484 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2485 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2486 2487 if (strcmp(model, "Maxtor")) 2488 return 1; 2489 if (strcmp(fw, "BANC1G10")) 2490 return 1; 2491 2492 return 0; /* blacklisted */ 2493 } 2494 2495 /** 2496 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2497 * @args: device IDENTIFY data / SCSI command of interest. 2498 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2499 * 2500 * Simulate MODE SENSE commands. Assume this is invoked for direct 2501 * access devices (e.g. disks) only. There should be no block 2502 * descriptor for other device types. 2503 * 2504 * LOCKING: 2505 * spin_lock_irqsave(host lock) 2506 */ 2507 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2508 { 2509 struct ata_device *dev = args->dev; 2510 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2511 const u8 sat_blk_desc[] = { 2512 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2513 0, 2514 0, 0x2, 0x0 /* block length: 512 bytes */ 2515 }; 2516 u8 pg, spg; 2517 unsigned int ebd, page_control, six_byte; 2518 u8 dpofua, bp = 0xff; 2519 u16 fp; 2520 2521 VPRINTK("ENTER\n"); 2522 2523 six_byte = (scsicmd[0] == MODE_SENSE); 2524 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2525 /* 2526 * LLBA bit in msense(10) ignored (compliant) 2527 */ 2528 2529 page_control = scsicmd[2] >> 6; 2530 switch (page_control) { 2531 case 0: /* current */ 2532 case 1: /* changeable */ 2533 case 2: /* defaults */ 2534 break; /* supported */ 2535 case 3: /* saved */ 2536 goto saving_not_supp; 2537 default: 2538 fp = 2; 2539 bp = 6; 2540 goto invalid_fld; 2541 } 2542 2543 if (six_byte) 2544 p += 4 + (ebd ? 8 : 0); 2545 else 2546 p += 8 + (ebd ? 8 : 0); 2547 2548 pg = scsicmd[2] & 0x3f; 2549 spg = scsicmd[3]; 2550 /* 2551 * No mode subpages supported (yet) but asking for _all_ 2552 * subpages may be valid 2553 */ 2554 if (spg && (spg != ALL_SUB_MPAGES)) { 2555 fp = 3; 2556 goto invalid_fld; 2557 } 2558 2559 switch(pg) { 2560 case RW_RECOVERY_MPAGE: 2561 p += ata_msense_rw_recovery(p, page_control == 1); 2562 break; 2563 2564 case CACHE_MPAGE: 2565 p += ata_msense_caching(args->id, p, page_control == 1); 2566 break; 2567 2568 case CONTROL_MPAGE: 2569 p += ata_msense_ctl_mode(args->dev, p, page_control == 1); 2570 break; 2571 2572 case ALL_MPAGES: 2573 p += ata_msense_rw_recovery(p, page_control == 1); 2574 p += ata_msense_caching(args->id, p, page_control == 1); 2575 p += ata_msense_ctl_mode(args->dev, p, page_control == 1); 2576 break; 2577 2578 default: /* invalid page code */ 2579 fp = 2; 2580 goto invalid_fld; 2581 } 2582 2583 dpofua = 0; 2584 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2585 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2586 dpofua = 1 << 4; 2587 2588 if (six_byte) { 2589 rbuf[0] = p - rbuf - 1; 2590 rbuf[2] |= dpofua; 2591 if (ebd) { 2592 rbuf[3] = sizeof(sat_blk_desc); 2593 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2594 } 2595 } else { 2596 unsigned int output_len = p - rbuf - 2; 2597 2598 rbuf[0] = output_len >> 8; 2599 rbuf[1] = output_len; 2600 rbuf[3] |= dpofua; 2601 if (ebd) { 2602 rbuf[7] = sizeof(sat_blk_desc); 2603 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2604 } 2605 } 2606 return 0; 2607 2608 invalid_fld: 2609 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2610 return 1; 2611 2612 saving_not_supp: 2613 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2614 /* "Saving parameters not supported" */ 2615 return 1; 2616 } 2617 2618 /** 2619 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2620 * @args: device IDENTIFY data / SCSI command of interest. 2621 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2622 * 2623 * Simulate READ CAPACITY commands. 2624 * 2625 * LOCKING: 2626 * None. 2627 */ 2628 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2629 { 2630 struct ata_device *dev = args->dev; 2631 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2632 u32 sector_size; /* physical sector size in bytes */ 2633 u8 log2_per_phys; 2634 u16 lowest_aligned; 2635 2636 sector_size = ata_id_logical_sector_size(dev->id); 2637 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2638 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2639 2640 VPRINTK("ENTER\n"); 2641 2642 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2643 if (last_lba >= 0xffffffffULL) 2644 last_lba = 0xffffffff; 2645 2646 /* sector count, 32-bit */ 2647 rbuf[0] = last_lba >> (8 * 3); 2648 rbuf[1] = last_lba >> (8 * 2); 2649 rbuf[2] = last_lba >> (8 * 1); 2650 rbuf[3] = last_lba; 2651 2652 /* sector size */ 2653 rbuf[4] = sector_size >> (8 * 3); 2654 rbuf[5] = sector_size >> (8 * 2); 2655 rbuf[6] = sector_size >> (8 * 1); 2656 rbuf[7] = sector_size; 2657 } else { 2658 /* sector count, 64-bit */ 2659 rbuf[0] = last_lba >> (8 * 7); 2660 rbuf[1] = last_lba >> (8 * 6); 2661 rbuf[2] = last_lba >> (8 * 5); 2662 rbuf[3] = last_lba >> (8 * 4); 2663 rbuf[4] = last_lba >> (8 * 3); 2664 rbuf[5] = last_lba >> (8 * 2); 2665 rbuf[6] = last_lba >> (8 * 1); 2666 rbuf[7] = last_lba; 2667 2668 /* sector size */ 2669 rbuf[ 8] = sector_size >> (8 * 3); 2670 rbuf[ 9] = sector_size >> (8 * 2); 2671 rbuf[10] = sector_size >> (8 * 1); 2672 rbuf[11] = sector_size; 2673 2674 rbuf[12] = 0; 2675 rbuf[13] = log2_per_phys; 2676 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2677 rbuf[15] = lowest_aligned; 2678 2679 if (ata_id_has_trim(args->id) && 2680 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2681 rbuf[14] |= 0x80; /* LBPME */ 2682 2683 if (ata_id_has_zero_after_trim(args->id) && 2684 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2685 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2686 rbuf[14] |= 0x40; /* LBPRZ */ 2687 } 2688 } 2689 if (ata_id_zoned_cap(args->id) || 2690 args->dev->class == ATA_DEV_ZAC) 2691 rbuf[12] = (1 << 4); /* RC_BASIS */ 2692 } 2693 return 0; 2694 } 2695 2696 /** 2697 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2698 * @args: device IDENTIFY data / SCSI command of interest. 2699 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2700 * 2701 * Simulate REPORT LUNS command. 2702 * 2703 * LOCKING: 2704 * spin_lock_irqsave(host lock) 2705 */ 2706 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2707 { 2708 VPRINTK("ENTER\n"); 2709 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2710 2711 return 0; 2712 } 2713 2714 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2715 { 2716 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2717 /* FIXME: not quite right; we don't want the 2718 * translation of taskfile registers into 2719 * a sense descriptors, since that's only 2720 * correct for ATA, not ATAPI 2721 */ 2722 ata_gen_passthru_sense(qc); 2723 } 2724 2725 ata_qc_done(qc); 2726 } 2727 2728 /* is it pointless to prefer PIO for "safety reasons"? */ 2729 static inline int ata_pio_use_silly(struct ata_port *ap) 2730 { 2731 return (ap->flags & ATA_FLAG_PIO_DMA); 2732 } 2733 2734 static void atapi_request_sense(struct ata_queued_cmd *qc) 2735 { 2736 struct ata_port *ap = qc->ap; 2737 struct scsi_cmnd *cmd = qc->scsicmd; 2738 2739 DPRINTK("ATAPI request sense\n"); 2740 2741 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2742 2743 #ifdef CONFIG_ATA_SFF 2744 if (ap->ops->sff_tf_read) 2745 ap->ops->sff_tf_read(ap, &qc->tf); 2746 #endif 2747 2748 /* fill these in, for the case where they are -not- overwritten */ 2749 cmd->sense_buffer[0] = 0x70; 2750 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2751 2752 ata_qc_reinit(qc); 2753 2754 /* setup sg table and init transfer direction */ 2755 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2756 ata_sg_init(qc, &qc->sgent, 1); 2757 qc->dma_dir = DMA_FROM_DEVICE; 2758 2759 memset(&qc->cdb, 0, qc->dev->cdb_len); 2760 qc->cdb[0] = REQUEST_SENSE; 2761 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2762 2763 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2764 qc->tf.command = ATA_CMD_PACKET; 2765 2766 if (ata_pio_use_silly(ap)) { 2767 qc->tf.protocol = ATAPI_PROT_DMA; 2768 qc->tf.feature |= ATAPI_PKT_DMA; 2769 } else { 2770 qc->tf.protocol = ATAPI_PROT_PIO; 2771 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2772 qc->tf.lbah = 0; 2773 } 2774 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2775 2776 qc->complete_fn = atapi_sense_complete; 2777 2778 ata_qc_issue(qc); 2779 2780 DPRINTK("EXIT\n"); 2781 } 2782 2783 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2784 { 2785 struct scsi_cmnd *cmd = qc->scsicmd; 2786 unsigned int err_mask = qc->err_mask; 2787 2788 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2789 2790 /* handle completion from new EH */ 2791 if (unlikely(qc->ap->ops->error_handler && 2792 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2793 2794 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2795 /* FIXME: not quite right; we don't want the 2796 * translation of taskfile registers into a 2797 * sense descriptors, since that's only 2798 * correct for ATA, not ATAPI 2799 */ 2800 ata_gen_passthru_sense(qc); 2801 } 2802 2803 /* SCSI EH automatically locks door if sdev->locked is 2804 * set. Sometimes door lock request continues to 2805 * fail, for example, when no media is present. This 2806 * creates a loop - SCSI EH issues door lock which 2807 * fails and gets invoked again to acquire sense data 2808 * for the failed command. 2809 * 2810 * If door lock fails, always clear sdev->locked to 2811 * avoid this infinite loop. 2812 * 2813 * This may happen before SCSI scan is complete. Make 2814 * sure qc->dev->sdev isn't NULL before dereferencing. 2815 */ 2816 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2817 qc->dev->sdev->locked = 0; 2818 2819 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2820 ata_qc_done(qc); 2821 return; 2822 } 2823 2824 /* successful completion or old EH failure path */ 2825 if (unlikely(err_mask & AC_ERR_DEV)) { 2826 cmd->result = SAM_STAT_CHECK_CONDITION; 2827 atapi_request_sense(qc); 2828 return; 2829 } else if (unlikely(err_mask)) { 2830 /* FIXME: not quite right; we don't want the 2831 * translation of taskfile registers into 2832 * a sense descriptors, since that's only 2833 * correct for ATA, not ATAPI 2834 */ 2835 ata_gen_passthru_sense(qc); 2836 } else { 2837 u8 *scsicmd = cmd->cmnd; 2838 2839 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { 2840 unsigned long flags; 2841 u8 *buf; 2842 2843 buf = ata_scsi_rbuf_get(cmd, true, &flags); 2844 2845 /* ATAPI devices typically report zero for their SCSI version, 2846 * and sometimes deviate from the spec WRT response data 2847 * format. If SCSI version is reported as zero like normal, 2848 * then we make the following fixups: 1) Fake MMC-5 version, 2849 * to indicate to the Linux scsi midlayer this is a modern 2850 * device. 2) Ensure response data format / ATAPI information 2851 * are always correct. 2852 */ 2853 if (buf[2] == 0) { 2854 buf[2] = 0x5; 2855 buf[3] = 0x32; 2856 } 2857 2858 ata_scsi_rbuf_put(cmd, true, &flags); 2859 } 2860 2861 cmd->result = SAM_STAT_GOOD; 2862 } 2863 2864 ata_qc_done(qc); 2865 } 2866 /** 2867 * atapi_xlat - Initialize PACKET taskfile 2868 * @qc: command structure to be initialized 2869 * 2870 * LOCKING: 2871 * spin_lock_irqsave(host lock) 2872 * 2873 * RETURNS: 2874 * Zero on success, non-zero on failure. 2875 */ 2876 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2877 { 2878 struct scsi_cmnd *scmd = qc->scsicmd; 2879 struct ata_device *dev = qc->dev; 2880 int nodata = (scmd->sc_data_direction == DMA_NONE); 2881 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2882 unsigned int nbytes; 2883 2884 memset(qc->cdb, 0, dev->cdb_len); 2885 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2886 2887 qc->complete_fn = atapi_qc_complete; 2888 2889 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2890 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2891 qc->tf.flags |= ATA_TFLAG_WRITE; 2892 DPRINTK("direction: write\n"); 2893 } 2894 2895 qc->tf.command = ATA_CMD_PACKET; 2896 ata_qc_set_pc_nbytes(qc); 2897 2898 /* check whether ATAPI DMA is safe */ 2899 if (!nodata && !using_pio && atapi_check_dma(qc)) 2900 using_pio = 1; 2901 2902 /* Some controller variants snoop this value for Packet 2903 * transfers to do state machine and FIFO management. Thus we 2904 * want to set it properly, and for DMA where it is 2905 * effectively meaningless. 2906 */ 2907 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2908 2909 /* Most ATAPI devices which honor transfer chunk size don't 2910 * behave according to the spec when odd chunk size which 2911 * matches the transfer length is specified. If the number of 2912 * bytes to transfer is 2n+1. According to the spec, what 2913 * should happen is to indicate that 2n+1 is going to be 2914 * transferred and transfer 2n+2 bytes where the last byte is 2915 * padding. 2916 * 2917 * In practice, this doesn't happen. ATAPI devices first 2918 * indicate and transfer 2n bytes and then indicate and 2919 * transfer 2 bytes where the last byte is padding. 2920 * 2921 * This inconsistency confuses several controllers which 2922 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2923 * These controllers use actual number of transferred bytes to 2924 * update DMA poitner and transfer of 4n+2 bytes make those 2925 * controller push DMA pointer by 4n+4 bytes because SATA data 2926 * FISes are aligned to 4 bytes. This causes data corruption 2927 * and buffer overrun. 2928 * 2929 * Always setting nbytes to even number solves this problem 2930 * because then ATAPI devices don't have to split data at 2n 2931 * boundaries. 2932 */ 2933 if (nbytes & 0x1) 2934 nbytes++; 2935 2936 qc->tf.lbam = (nbytes & 0xFF); 2937 qc->tf.lbah = (nbytes >> 8); 2938 2939 if (nodata) 2940 qc->tf.protocol = ATAPI_PROT_NODATA; 2941 else if (using_pio) 2942 qc->tf.protocol = ATAPI_PROT_PIO; 2943 else { 2944 /* DMA data xfer */ 2945 qc->tf.protocol = ATAPI_PROT_DMA; 2946 qc->tf.feature |= ATAPI_PKT_DMA; 2947 2948 if ((dev->flags & ATA_DFLAG_DMADIR) && 2949 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2950 /* some SATA bridges need us to indicate data xfer direction */ 2951 qc->tf.feature |= ATAPI_DMADIR; 2952 } 2953 2954 2955 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2956 as ATAPI tape drives don't get this right otherwise */ 2957 return 0; 2958 } 2959 2960 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2961 { 2962 if (!sata_pmp_attached(ap)) { 2963 if (likely(devno < ata_link_max_devices(&ap->link))) 2964 return &ap->link.device[devno]; 2965 } else { 2966 if (likely(devno < ap->nr_pmp_links)) 2967 return &ap->pmp_link[devno].device[0]; 2968 } 2969 2970 return NULL; 2971 } 2972 2973 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2974 const struct scsi_device *scsidev) 2975 { 2976 int devno; 2977 2978 /* skip commands not addressed to targets we simulate */ 2979 if (!sata_pmp_attached(ap)) { 2980 if (unlikely(scsidev->channel || scsidev->lun)) 2981 return NULL; 2982 devno = scsidev->id; 2983 } else { 2984 if (unlikely(scsidev->id || scsidev->lun)) 2985 return NULL; 2986 devno = scsidev->channel; 2987 } 2988 2989 return ata_find_dev(ap, devno); 2990 } 2991 2992 /** 2993 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2994 * @ap: ATA port to which the device is attached 2995 * @scsidev: SCSI device from which we derive the ATA device 2996 * 2997 * Given various information provided in struct scsi_cmnd, 2998 * map that onto an ATA bus, and using that mapping 2999 * determine which ata_device is associated with the 3000 * SCSI command to be sent. 3001 * 3002 * LOCKING: 3003 * spin_lock_irqsave(host lock) 3004 * 3005 * RETURNS: 3006 * Associated ATA device, or %NULL if not found. 3007 */ 3008 static struct ata_device * 3009 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3010 { 3011 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3012 3013 if (unlikely(!dev || !ata_dev_enabled(dev))) 3014 return NULL; 3015 3016 return dev; 3017 } 3018 3019 /* 3020 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3021 * @byte1: Byte 1 from pass-thru CDB. 3022 * 3023 * RETURNS: 3024 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3025 */ 3026 static u8 3027 ata_scsi_map_proto(u8 byte1) 3028 { 3029 switch((byte1 & 0x1e) >> 1) { 3030 case 3: /* Non-data */ 3031 return ATA_PROT_NODATA; 3032 3033 case 6: /* DMA */ 3034 case 10: /* UDMA Data-in */ 3035 case 11: /* UDMA Data-Out */ 3036 return ATA_PROT_DMA; 3037 3038 case 4: /* PIO Data-in */ 3039 case 5: /* PIO Data-out */ 3040 return ATA_PROT_PIO; 3041 3042 case 12: /* FPDMA */ 3043 return ATA_PROT_NCQ; 3044 3045 case 0: /* Hard Reset */ 3046 case 1: /* SRST */ 3047 case 8: /* Device Diagnostic */ 3048 case 9: /* Device Reset */ 3049 case 7: /* DMA Queued */ 3050 case 15: /* Return Response Info */ 3051 default: /* Reserved */ 3052 break; 3053 } 3054 3055 return ATA_PROT_UNKNOWN; 3056 } 3057 3058 /** 3059 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3060 * @qc: command structure to be initialized 3061 * 3062 * Handles either 12 or 16-byte versions of the CDB. 3063 * 3064 * RETURNS: 3065 * Zero on success, non-zero on failure. 3066 */ 3067 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3068 { 3069 struct ata_taskfile *tf = &(qc->tf); 3070 struct scsi_cmnd *scmd = qc->scsicmd; 3071 struct ata_device *dev = qc->dev; 3072 const u8 *cdb = scmd->cmnd; 3073 u16 fp; 3074 3075 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) { 3076 fp = 1; 3077 goto invalid_fld; 3078 } 3079 3080 /* enable LBA */ 3081 tf->flags |= ATA_TFLAG_LBA; 3082 3083 /* 3084 * 12 and 16 byte CDBs use different offsets to 3085 * provide the various register values. 3086 */ 3087 if (cdb[0] == ATA_16) { 3088 /* 3089 * 16-byte CDB - may contain extended commands. 3090 * 3091 * If that is the case, copy the upper byte register values. 3092 */ 3093 if (cdb[1] & 0x01) { 3094 tf->hob_feature = cdb[3]; 3095 tf->hob_nsect = cdb[5]; 3096 tf->hob_lbal = cdb[7]; 3097 tf->hob_lbam = cdb[9]; 3098 tf->hob_lbah = cdb[11]; 3099 tf->flags |= ATA_TFLAG_LBA48; 3100 } else 3101 tf->flags &= ~ATA_TFLAG_LBA48; 3102 3103 /* 3104 * Always copy low byte, device and command registers. 3105 */ 3106 tf->feature = cdb[4]; 3107 tf->nsect = cdb[6]; 3108 tf->lbal = cdb[8]; 3109 tf->lbam = cdb[10]; 3110 tf->lbah = cdb[12]; 3111 tf->device = cdb[13]; 3112 tf->command = cdb[14]; 3113 } else { 3114 /* 3115 * 12-byte CDB - incapable of extended commands. 3116 */ 3117 tf->flags &= ~ATA_TFLAG_LBA48; 3118 3119 tf->feature = cdb[3]; 3120 tf->nsect = cdb[4]; 3121 tf->lbal = cdb[5]; 3122 tf->lbam = cdb[6]; 3123 tf->lbah = cdb[7]; 3124 tf->device = cdb[8]; 3125 tf->command = cdb[9]; 3126 } 3127 3128 /* For NCQ commands with FPDMA protocol, copy the tag value */ 3129 if (tf->protocol == ATA_PROT_NCQ) 3130 tf->nsect = qc->tag << 3; 3131 3132 /* enforce correct master/slave bit */ 3133 tf->device = dev->devno ? 3134 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3135 3136 switch (tf->command) { 3137 /* READ/WRITE LONG use a non-standard sect_size */ 3138 case ATA_CMD_READ_LONG: 3139 case ATA_CMD_READ_LONG_ONCE: 3140 case ATA_CMD_WRITE_LONG: 3141 case ATA_CMD_WRITE_LONG_ONCE: 3142 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3143 fp = 1; 3144 goto invalid_fld; 3145 } 3146 qc->sect_size = scsi_bufflen(scmd); 3147 break; 3148 3149 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3150 case ATA_CMD_CFA_WRITE_NE: 3151 case ATA_CMD_CFA_TRANS_SECT: 3152 case ATA_CMD_CFA_WRITE_MULT_NE: 3153 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3154 case ATA_CMD_READ: 3155 case ATA_CMD_READ_EXT: 3156 case ATA_CMD_READ_QUEUED: 3157 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3158 case ATA_CMD_FPDMA_READ: 3159 case ATA_CMD_READ_MULTI: 3160 case ATA_CMD_READ_MULTI_EXT: 3161 case ATA_CMD_PIO_READ: 3162 case ATA_CMD_PIO_READ_EXT: 3163 case ATA_CMD_READ_STREAM_DMA_EXT: 3164 case ATA_CMD_READ_STREAM_EXT: 3165 case ATA_CMD_VERIFY: 3166 case ATA_CMD_VERIFY_EXT: 3167 case ATA_CMD_WRITE: 3168 case ATA_CMD_WRITE_EXT: 3169 case ATA_CMD_WRITE_FUA_EXT: 3170 case ATA_CMD_WRITE_QUEUED: 3171 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3172 case ATA_CMD_FPDMA_WRITE: 3173 case ATA_CMD_WRITE_MULTI: 3174 case ATA_CMD_WRITE_MULTI_EXT: 3175 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3176 case ATA_CMD_PIO_WRITE: 3177 case ATA_CMD_PIO_WRITE_EXT: 3178 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3179 case ATA_CMD_WRITE_STREAM_EXT: 3180 qc->sect_size = scmd->device->sector_size; 3181 break; 3182 3183 /* Everything else uses 512 byte "sectors" */ 3184 default: 3185 qc->sect_size = ATA_SECT_SIZE; 3186 } 3187 3188 /* 3189 * Set flags so that all registers will be written, pass on 3190 * write indication (used for PIO/DMA setup), result TF is 3191 * copied back and we don't whine too much about its failure. 3192 */ 3193 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3194 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3195 tf->flags |= ATA_TFLAG_WRITE; 3196 3197 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3198 3199 /* 3200 * Set transfer length. 3201 * 3202 * TODO: find out if we need to do more here to 3203 * cover scatter/gather case. 3204 */ 3205 ata_qc_set_pc_nbytes(qc); 3206 3207 /* We may not issue DMA commands if no DMA mode is set */ 3208 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3209 fp = 1; 3210 goto invalid_fld; 3211 } 3212 3213 /* sanity check for pio multi commands */ 3214 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3215 fp = 1; 3216 goto invalid_fld; 3217 } 3218 3219 if (is_multi_taskfile(tf)) { 3220 unsigned int multi_count = 1 << (cdb[1] >> 5); 3221 3222 /* compare the passed through multi_count 3223 * with the cached multi_count of libata 3224 */ 3225 if (multi_count != dev->multi_count) 3226 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3227 multi_count); 3228 } 3229 3230 /* 3231 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3232 * SET_FEATURES - XFER MODE must be preceded/succeeded 3233 * by an update to hardware-specific registers for each 3234 * controller (i.e. the reason for ->set_piomode(), 3235 * ->set_dmamode(), and ->post_set_mode() hooks). 3236 */ 3237 if (tf->command == ATA_CMD_SET_FEATURES && 3238 tf->feature == SETFEATURES_XFER) { 3239 fp = (cdb[0] == ATA_16) ? 4 : 3; 3240 goto invalid_fld; 3241 } 3242 3243 /* 3244 * Filter TPM commands by default. These provide an 3245 * essentially uncontrolled encrypted "back door" between 3246 * applications and the disk. Set libata.allow_tpm=1 if you 3247 * have a real reason for wanting to use them. This ensures 3248 * that installed software cannot easily mess stuff up without 3249 * user intent. DVR type users will probably ship with this enabled 3250 * for movie content management. 3251 * 3252 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3253 * for this and should do in future but that it is not sufficient as 3254 * DCS is an optional feature set. Thus we also do the software filter 3255 * so that we comply with the TC consortium stated goal that the user 3256 * can turn off TC features of their system. 3257 */ 3258 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3259 fp = (cdb[0] == ATA_16) ? 14 : 9; 3260 goto invalid_fld; 3261 } 3262 3263 return 0; 3264 3265 invalid_fld: 3266 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3267 return 1; 3268 } 3269 3270 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3271 { 3272 struct ata_taskfile *tf = &qc->tf; 3273 struct scsi_cmnd *scmd = qc->scsicmd; 3274 struct ata_device *dev = qc->dev; 3275 const u8 *cdb = scmd->cmnd; 3276 u64 block; 3277 u32 n_block; 3278 u32 size; 3279 void *buf; 3280 u16 fp; 3281 u8 bp = 0xff; 3282 3283 /* we may not issue DMA commands if no DMA mode is set */ 3284 if (unlikely(!dev->dma_mode)) 3285 goto invalid_opcode; 3286 3287 if (unlikely(scmd->cmd_len < 16)) { 3288 fp = 15; 3289 goto invalid_fld; 3290 } 3291 scsi_16_lba_len(cdb, &block, &n_block); 3292 3293 /* for now we only support WRITE SAME with the unmap bit set */ 3294 if (unlikely(!(cdb[1] & 0x8))) { 3295 fp = 1; 3296 bp = 3; 3297 goto invalid_fld; 3298 } 3299 3300 /* 3301 * WRITE SAME always has a sector sized buffer as payload, this 3302 * should never be a multiple entry S/G list. 3303 */ 3304 if (!scsi_sg_count(scmd)) 3305 goto invalid_param_len; 3306 3307 buf = page_address(sg_page(scsi_sglist(scmd))); 3308 size = ata_set_lba_range_entries(buf, 512, block, n_block); 3309 3310 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3311 /* Newer devices support queued TRIM commands */ 3312 tf->protocol = ATA_PROT_NCQ; 3313 tf->command = ATA_CMD_FPDMA_SEND; 3314 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3315 tf->nsect = qc->tag << 3; 3316 tf->hob_feature = (size / 512) >> 8; 3317 tf->feature = size / 512; 3318 3319 tf->auxiliary = 1; 3320 } else { 3321 tf->protocol = ATA_PROT_DMA; 3322 tf->hob_feature = 0; 3323 tf->feature = ATA_DSM_TRIM; 3324 tf->hob_nsect = (size / 512) >> 8; 3325 tf->nsect = size / 512; 3326 tf->command = ATA_CMD_DSM; 3327 } 3328 3329 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3330 ATA_TFLAG_WRITE; 3331 3332 ata_qc_set_pc_nbytes(qc); 3333 3334 return 0; 3335 3336 invalid_fld: 3337 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3338 return 1; 3339 invalid_param_len: 3340 /* "Parameter list length error" */ 3341 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3342 return 1; 3343 invalid_opcode: 3344 /* "Invalid command operation code" */ 3345 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3346 return 1; 3347 } 3348 3349 /** 3350 * ata_scsi_report_zones_complete - convert ATA output 3351 * @qc: command structure returning the data 3352 * 3353 * Convert T-13 little-endian field representation into 3354 * T-10 big-endian field representation. 3355 * What a mess. 3356 */ 3357 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3358 { 3359 struct scsi_cmnd *scmd = qc->scsicmd; 3360 struct sg_mapping_iter miter; 3361 unsigned long flags; 3362 unsigned int bytes = 0; 3363 3364 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3365 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3366 3367 local_irq_save(flags); 3368 while (sg_miter_next(&miter)) { 3369 unsigned int offset = 0; 3370 3371 if (bytes == 0) { 3372 char *hdr; 3373 u32 list_length; 3374 u64 max_lba, opt_lba; 3375 u16 same; 3376 3377 /* Swizzle header */ 3378 hdr = miter.addr; 3379 list_length = get_unaligned_le32(&hdr[0]); 3380 same = get_unaligned_le16(&hdr[4]); 3381 max_lba = get_unaligned_le64(&hdr[8]); 3382 opt_lba = get_unaligned_le64(&hdr[16]); 3383 put_unaligned_be32(list_length, &hdr[0]); 3384 hdr[4] = same & 0xf; 3385 put_unaligned_be64(max_lba, &hdr[8]); 3386 put_unaligned_be64(opt_lba, &hdr[16]); 3387 offset += 64; 3388 bytes += 64; 3389 } 3390 while (offset < miter.length) { 3391 char *rec; 3392 u8 cond, type, non_seq, reset; 3393 u64 size, start, wp; 3394 3395 /* Swizzle zone descriptor */ 3396 rec = miter.addr + offset; 3397 type = rec[0] & 0xf; 3398 cond = (rec[1] >> 4) & 0xf; 3399 non_seq = (rec[1] & 2); 3400 reset = (rec[1] & 1); 3401 size = get_unaligned_le64(&rec[8]); 3402 start = get_unaligned_le64(&rec[16]); 3403 wp = get_unaligned_le64(&rec[24]); 3404 rec[0] = type; 3405 rec[1] = (cond << 4) | non_seq | reset; 3406 put_unaligned_be64(size, &rec[8]); 3407 put_unaligned_be64(start, &rec[16]); 3408 put_unaligned_be64(wp, &rec[24]); 3409 WARN_ON(offset + 64 > miter.length); 3410 offset += 64; 3411 bytes += 64; 3412 } 3413 } 3414 sg_miter_stop(&miter); 3415 local_irq_restore(flags); 3416 3417 ata_scsi_qc_complete(qc); 3418 } 3419 3420 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3421 { 3422 struct ata_taskfile *tf = &qc->tf; 3423 struct scsi_cmnd *scmd = qc->scsicmd; 3424 const u8 *cdb = scmd->cmnd; 3425 u16 sect, fp = (u16)-1; 3426 u8 sa, options, bp = 0xff; 3427 u64 block; 3428 u32 n_block; 3429 3430 if (unlikely(scmd->cmd_len < 16)) { 3431 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3432 scmd->cmd_len); 3433 fp = 15; 3434 goto invalid_fld; 3435 } 3436 scsi_16_lba_len(cdb, &block, &n_block); 3437 if (n_block != scsi_bufflen(scmd)) { 3438 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3439 n_block, scsi_bufflen(scmd)); 3440 goto invalid_param_len; 3441 } 3442 sa = cdb[1] & 0x1f; 3443 if (sa != ZI_REPORT_ZONES) { 3444 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3445 fp = 1; 3446 goto invalid_fld; 3447 } 3448 /* 3449 * ZAC allows only for transfers in 512 byte blocks, 3450 * and uses a 16 bit value for the transfer count. 3451 */ 3452 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3453 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3454 goto invalid_param_len; 3455 } 3456 sect = n_block / 512; 3457 options = cdb[14]; 3458 3459 if (ata_ncq_enabled(qc->dev) && 3460 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3461 tf->protocol = ATA_PROT_NCQ; 3462 tf->command = ATA_CMD_FPDMA_RECV; 3463 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3464 tf->nsect = qc->tag << 3; 3465 tf->feature = sect & 0xff; 3466 tf->hob_feature = (sect >> 8) & 0xff; 3467 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3468 } else { 3469 tf->command = ATA_CMD_ZAC_MGMT_IN; 3470 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3471 tf->protocol = ATA_PROT_DMA; 3472 tf->hob_feature = options; 3473 tf->hob_nsect = (sect >> 8) & 0xff; 3474 tf->nsect = sect & 0xff; 3475 } 3476 tf->device = ATA_LBA; 3477 tf->lbah = (block >> 16) & 0xff; 3478 tf->lbam = (block >> 8) & 0xff; 3479 tf->lbal = block & 0xff; 3480 tf->hob_lbah = (block >> 40) & 0xff; 3481 tf->hob_lbam = (block >> 32) & 0xff; 3482 tf->hob_lbal = (block >> 24) & 0xff; 3483 3484 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3485 qc->flags |= ATA_QCFLAG_RESULT_TF; 3486 3487 ata_qc_set_pc_nbytes(qc); 3488 3489 qc->complete_fn = ata_scsi_report_zones_complete; 3490 3491 return 0; 3492 3493 invalid_fld: 3494 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3495 return 1; 3496 3497 invalid_param_len: 3498 /* "Parameter list length error" */ 3499 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3500 return 1; 3501 } 3502 3503 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3504 { 3505 struct ata_taskfile *tf = &qc->tf; 3506 struct scsi_cmnd *scmd = qc->scsicmd; 3507 struct ata_device *dev = qc->dev; 3508 const u8 *cdb = scmd->cmnd; 3509 u8 reset_all, sa; 3510 u64 block; 3511 u32 n_block; 3512 u16 fp = (u16)-1; 3513 3514 if (unlikely(scmd->cmd_len < 16)) { 3515 fp = 15; 3516 goto invalid_fld; 3517 } 3518 3519 sa = cdb[1] & 0x1f; 3520 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3521 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3522 fp = 1; 3523 goto invalid_fld; 3524 } 3525 3526 scsi_16_lba_len(cdb, &block, &n_block); 3527 if (n_block) { 3528 /* 3529 * ZAC MANAGEMENT OUT doesn't define any length 3530 */ 3531 goto invalid_param_len; 3532 } 3533 if (block > dev->n_sectors) 3534 goto out_of_range; 3535 3536 reset_all = cdb[14] & 0x1; 3537 3538 if (ata_ncq_enabled(qc->dev) && 3539 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3540 tf->protocol = ATA_PROT_NCQ; 3541 tf->command = ATA_CMD_NCQ_NON_DATA; 3542 tf->hob_nsect = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3543 tf->nsect = qc->tag << 3; 3544 tf->auxiliary = sa | (reset_all & 0x1) << 8; 3545 } else { 3546 tf->protocol = ATA_PROT_NODATA; 3547 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3548 tf->feature = sa; 3549 tf->hob_feature = reset_all & 0x1; 3550 } 3551 tf->lbah = (block >> 16) & 0xff; 3552 tf->lbam = (block >> 8) & 0xff; 3553 tf->lbal = block & 0xff; 3554 tf->hob_lbah = (block >> 40) & 0xff; 3555 tf->hob_lbam = (block >> 32) & 0xff; 3556 tf->hob_lbal = (block >> 24) & 0xff; 3557 tf->device = ATA_LBA; 3558 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3559 3560 return 0; 3561 3562 invalid_fld: 3563 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3564 return 1; 3565 out_of_range: 3566 /* "Logical Block Address out of range" */ 3567 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00); 3568 return 1; 3569 invalid_param_len: 3570 /* "Parameter list length error" */ 3571 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3572 return 1; 3573 } 3574 3575 /** 3576 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3577 * @qc: Storage for translated ATA taskfile 3578 * @buf: input buffer 3579 * @len: number of valid bytes in the input buffer 3580 * @fp: out parameter for the failed field on error 3581 * 3582 * Prepare a taskfile to modify caching information for the device. 3583 * 3584 * LOCKING: 3585 * None. 3586 */ 3587 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3588 const u8 *buf, int len, u16 *fp) 3589 { 3590 struct ata_taskfile *tf = &qc->tf; 3591 struct ata_device *dev = qc->dev; 3592 char mpage[CACHE_MPAGE_LEN]; 3593 u8 wce; 3594 int i; 3595 3596 /* 3597 * The first two bytes of def_cache_mpage are a header, so offsets 3598 * in mpage are off by 2 compared to buf. Same for len. 3599 */ 3600 3601 if (len != CACHE_MPAGE_LEN - 2) { 3602 if (len < CACHE_MPAGE_LEN - 2) 3603 *fp = len; 3604 else 3605 *fp = CACHE_MPAGE_LEN - 2; 3606 return -EINVAL; 3607 } 3608 3609 wce = buf[0] & (1 << 2); 3610 3611 /* 3612 * Check that read-only bits are not modified. 3613 */ 3614 ata_msense_caching(dev->id, mpage, false); 3615 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3616 if (i == 0) 3617 continue; 3618 if (mpage[i + 2] != buf[i]) { 3619 *fp = i; 3620 return -EINVAL; 3621 } 3622 } 3623 3624 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3625 tf->protocol = ATA_PROT_NODATA; 3626 tf->nsect = 0; 3627 tf->command = ATA_CMD_SET_FEATURES; 3628 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3629 return 0; 3630 } 3631 3632 /** 3633 * ata_mselect_control - Simulate MODE SELECT for control page 3634 * @qc: Storage for translated ATA taskfile 3635 * @buf: input buffer 3636 * @len: number of valid bytes in the input buffer 3637 * @fp: out parameter for the failed field on error 3638 * 3639 * Prepare a taskfile to modify caching information for the device. 3640 * 3641 * LOCKING: 3642 * None. 3643 */ 3644 static int ata_mselect_control(struct ata_queued_cmd *qc, 3645 const u8 *buf, int len, u16 *fp) 3646 { 3647 struct ata_device *dev = qc->dev; 3648 char mpage[CONTROL_MPAGE_LEN]; 3649 u8 d_sense; 3650 int i; 3651 3652 /* 3653 * The first two bytes of def_control_mpage are a header, so offsets 3654 * in mpage are off by 2 compared to buf. Same for len. 3655 */ 3656 3657 if (len != CONTROL_MPAGE_LEN - 2) { 3658 if (len < CONTROL_MPAGE_LEN - 2) 3659 *fp = len; 3660 else 3661 *fp = CONTROL_MPAGE_LEN - 2; 3662 return -EINVAL; 3663 } 3664 3665 d_sense = buf[0] & (1 << 2); 3666 3667 /* 3668 * Check that read-only bits are not modified. 3669 */ 3670 ata_msense_ctl_mode(dev, mpage, false); 3671 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3672 if (i == 0) 3673 continue; 3674 if (mpage[2 + i] != buf[i]) { 3675 *fp = i; 3676 return -EINVAL; 3677 } 3678 } 3679 if (d_sense & (1 << 2)) 3680 dev->flags |= ATA_DFLAG_D_SENSE; 3681 else 3682 dev->flags &= ~ATA_DFLAG_D_SENSE; 3683 qc->scsicmd->result = SAM_STAT_GOOD; 3684 qc->scsicmd->scsi_done(qc->scsicmd); 3685 return 0; 3686 } 3687 3688 /** 3689 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands 3690 * @qc: Storage for translated ATA taskfile 3691 * 3692 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3693 * Assume this is invoked for direct access devices (e.g. disks) only. 3694 * There should be no block descriptor for other device types. 3695 * 3696 * LOCKING: 3697 * spin_lock_irqsave(host lock) 3698 */ 3699 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3700 { 3701 struct scsi_cmnd *scmd = qc->scsicmd; 3702 const u8 *cdb = scmd->cmnd; 3703 const u8 *p; 3704 u8 pg, spg; 3705 unsigned six_byte, pg_len, hdr_len, bd_len; 3706 int len; 3707 u16 fp = (u16)-1; 3708 u8 bp = 0xff; 3709 3710 VPRINTK("ENTER\n"); 3711 3712 six_byte = (cdb[0] == MODE_SELECT); 3713 if (six_byte) { 3714 if (scmd->cmd_len < 5) { 3715 fp = 4; 3716 goto invalid_fld; 3717 } 3718 3719 len = cdb[4]; 3720 hdr_len = 4; 3721 } else { 3722 if (scmd->cmd_len < 9) { 3723 fp = 8; 3724 goto invalid_fld; 3725 } 3726 3727 len = (cdb[7] << 8) + cdb[8]; 3728 hdr_len = 8; 3729 } 3730 3731 /* We only support PF=1, SP=0. */ 3732 if ((cdb[1] & 0x11) != 0x10) { 3733 fp = 1; 3734 bp = (cdb[1] & 0x01) ? 1 : 5; 3735 goto invalid_fld; 3736 } 3737 3738 /* Test early for possible overrun. */ 3739 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3740 goto invalid_param_len; 3741 3742 p = page_address(sg_page(scsi_sglist(scmd))); 3743 3744 /* Move past header and block descriptors. */ 3745 if (len < hdr_len) 3746 goto invalid_param_len; 3747 3748 if (six_byte) 3749 bd_len = p[3]; 3750 else 3751 bd_len = (p[6] << 8) + p[7]; 3752 3753 len -= hdr_len; 3754 p += hdr_len; 3755 if (len < bd_len) 3756 goto invalid_param_len; 3757 if (bd_len != 0 && bd_len != 8) { 3758 fp = (six_byte) ? 3 : 6; 3759 fp += bd_len + hdr_len; 3760 goto invalid_param; 3761 } 3762 3763 len -= bd_len; 3764 p += bd_len; 3765 if (len == 0) 3766 goto skip; 3767 3768 /* Parse both possible formats for the mode page headers. */ 3769 pg = p[0] & 0x3f; 3770 if (p[0] & 0x40) { 3771 if (len < 4) 3772 goto invalid_param_len; 3773 3774 spg = p[1]; 3775 pg_len = (p[2] << 8) | p[3]; 3776 p += 4; 3777 len -= 4; 3778 } else { 3779 if (len < 2) 3780 goto invalid_param_len; 3781 3782 spg = 0; 3783 pg_len = p[1]; 3784 p += 2; 3785 len -= 2; 3786 } 3787 3788 /* 3789 * No mode subpages supported (yet) but asking for _all_ 3790 * subpages may be valid 3791 */ 3792 if (spg && (spg != ALL_SUB_MPAGES)) { 3793 fp = (p[0] & 0x40) ? 1 : 0; 3794 fp += hdr_len + bd_len; 3795 goto invalid_param; 3796 } 3797 if (pg_len > len) 3798 goto invalid_param_len; 3799 3800 switch (pg) { 3801 case CACHE_MPAGE: 3802 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3803 fp += hdr_len + bd_len; 3804 goto invalid_param; 3805 } 3806 break; 3807 case CONTROL_MPAGE: 3808 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 3809 fp += hdr_len + bd_len; 3810 goto invalid_param; 3811 } 3812 break; 3813 default: /* invalid page code */ 3814 fp = bd_len + hdr_len; 3815 goto invalid_param; 3816 } 3817 3818 /* 3819 * Only one page has changeable data, so we only support setting one 3820 * page at a time. 3821 */ 3822 if (len > pg_len) 3823 goto invalid_param; 3824 3825 return 0; 3826 3827 invalid_fld: 3828 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3829 return 1; 3830 3831 invalid_param: 3832 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3833 return 1; 3834 3835 invalid_param_len: 3836 /* "Parameter list length error" */ 3837 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3838 return 1; 3839 3840 skip: 3841 scmd->result = SAM_STAT_GOOD; 3842 return 1; 3843 } 3844 3845 /** 3846 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3847 * @dev: ATA device 3848 * @cmd: SCSI command opcode to consider 3849 * 3850 * Look up the SCSI command given, and determine whether the 3851 * SCSI command is to be translated or simulated. 3852 * 3853 * RETURNS: 3854 * Pointer to translation function if possible, %NULL if not. 3855 */ 3856 3857 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3858 { 3859 switch (cmd) { 3860 case READ_6: 3861 case READ_10: 3862 case READ_16: 3863 3864 case WRITE_6: 3865 case WRITE_10: 3866 case WRITE_16: 3867 return ata_scsi_rw_xlat; 3868 3869 case WRITE_SAME_16: 3870 return ata_scsi_write_same_xlat; 3871 3872 case SYNCHRONIZE_CACHE: 3873 if (ata_try_flush_cache(dev)) 3874 return ata_scsi_flush_xlat; 3875 break; 3876 3877 case VERIFY: 3878 case VERIFY_16: 3879 return ata_scsi_verify_xlat; 3880 3881 case ATA_12: 3882 case ATA_16: 3883 return ata_scsi_pass_thru; 3884 3885 case MODE_SELECT: 3886 case MODE_SELECT_10: 3887 return ata_scsi_mode_select_xlat; 3888 break; 3889 3890 case ZBC_IN: 3891 return ata_scsi_zbc_in_xlat; 3892 3893 case ZBC_OUT: 3894 return ata_scsi_zbc_out_xlat; 3895 3896 case START_STOP: 3897 return ata_scsi_start_stop_xlat; 3898 } 3899 3900 return NULL; 3901 } 3902 3903 /** 3904 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 3905 * @ap: ATA port to which the command was being sent 3906 * @cmd: SCSI command to dump 3907 * 3908 * Prints the contents of a SCSI command via printk(). 3909 */ 3910 3911 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 3912 struct scsi_cmnd *cmd) 3913 { 3914 #ifdef ATA_DEBUG 3915 struct scsi_device *scsidev = cmd->device; 3916 3917 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n", 3918 ap->print_id, 3919 scsidev->channel, scsidev->id, scsidev->lun, 3920 cmd->cmnd); 3921 #endif 3922 } 3923 3924 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 3925 struct ata_device *dev) 3926 { 3927 u8 scsi_op = scmd->cmnd[0]; 3928 ata_xlat_func_t xlat_func; 3929 int rc = 0; 3930 3931 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 3932 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 3933 goto bad_cdb_len; 3934 3935 xlat_func = ata_get_xlat_func(dev, scsi_op); 3936 } else { 3937 if (unlikely(!scmd->cmd_len)) 3938 goto bad_cdb_len; 3939 3940 xlat_func = NULL; 3941 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3942 /* relay SCSI command to ATAPI device */ 3943 int len = COMMAND_SIZE(scsi_op); 3944 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 3945 goto bad_cdb_len; 3946 3947 xlat_func = atapi_xlat; 3948 } else { 3949 /* ATA_16 passthru, treat as an ATA command */ 3950 if (unlikely(scmd->cmd_len > 16)) 3951 goto bad_cdb_len; 3952 3953 xlat_func = ata_get_xlat_func(dev, scsi_op); 3954 } 3955 } 3956 3957 if (xlat_func) 3958 rc = ata_scsi_translate(dev, scmd, xlat_func); 3959 else 3960 ata_scsi_simulate(dev, scmd); 3961 3962 return rc; 3963 3964 bad_cdb_len: 3965 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 3966 scmd->cmd_len, scsi_op, dev->cdb_len); 3967 scmd->result = DID_ERROR << 16; 3968 scmd->scsi_done(scmd); 3969 return 0; 3970 } 3971 3972 /** 3973 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 3974 * @shost: SCSI host of command to be sent 3975 * @cmd: SCSI command to be sent 3976 * 3977 * In some cases, this function translates SCSI commands into 3978 * ATA taskfiles, and queues the taskfiles to be sent to 3979 * hardware. In other cases, this function simulates a 3980 * SCSI device by evaluating and responding to certain 3981 * SCSI commands. This creates the overall effect of 3982 * ATA and ATAPI devices appearing as SCSI devices. 3983 * 3984 * LOCKING: 3985 * ATA host lock 3986 * 3987 * RETURNS: 3988 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 3989 * 0 otherwise. 3990 */ 3991 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 3992 { 3993 struct ata_port *ap; 3994 struct ata_device *dev; 3995 struct scsi_device *scsidev = cmd->device; 3996 int rc = 0; 3997 unsigned long irq_flags; 3998 3999 ap = ata_shost_to_port(shost); 4000 4001 spin_lock_irqsave(ap->lock, irq_flags); 4002 4003 ata_scsi_dump_cdb(ap, cmd); 4004 4005 dev = ata_scsi_find_dev(ap, scsidev); 4006 if (likely(dev)) 4007 rc = __ata_scsi_queuecmd(cmd, dev); 4008 else { 4009 cmd->result = (DID_BAD_TARGET << 16); 4010 cmd->scsi_done(cmd); 4011 } 4012 4013 spin_unlock_irqrestore(ap->lock, irq_flags); 4014 4015 return rc; 4016 } 4017 4018 /** 4019 * ata_scsi_simulate - simulate SCSI command on ATA device 4020 * @dev: the target device 4021 * @cmd: SCSI command being sent to device. 4022 * 4023 * Interprets and directly executes a select list of SCSI commands 4024 * that can be handled internally. 4025 * 4026 * LOCKING: 4027 * spin_lock_irqsave(host lock) 4028 */ 4029 4030 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4031 { 4032 struct ata_scsi_args args; 4033 const u8 *scsicmd = cmd->cmnd; 4034 u8 tmp8; 4035 4036 args.dev = dev; 4037 args.id = dev->id; 4038 args.cmd = cmd; 4039 args.done = cmd->scsi_done; 4040 4041 switch(scsicmd[0]) { 4042 /* TODO: worth improving? */ 4043 case FORMAT_UNIT: 4044 ata_scsi_invalid_field(dev, cmd, 0); 4045 break; 4046 4047 case INQUIRY: 4048 if (scsicmd[1] & 2) /* is CmdDt set? */ 4049 ata_scsi_invalid_field(dev, cmd, 1); 4050 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4051 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4052 else switch (scsicmd[2]) { 4053 case 0x00: 4054 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4055 break; 4056 case 0x80: 4057 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4058 break; 4059 case 0x83: 4060 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4061 break; 4062 case 0x89: 4063 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4064 break; 4065 case 0xb0: 4066 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4067 break; 4068 case 0xb1: 4069 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4070 break; 4071 case 0xb2: 4072 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4073 break; 4074 case 0xb6: 4075 if (dev->flags & ATA_DFLAG_ZAC) { 4076 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4077 break; 4078 } 4079 /* Fallthrough */ 4080 default: 4081 ata_scsi_invalid_field(dev, cmd, 2); 4082 break; 4083 } 4084 break; 4085 4086 case MODE_SENSE: 4087 case MODE_SENSE_10: 4088 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4089 break; 4090 4091 case READ_CAPACITY: 4092 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4093 break; 4094 4095 case SERVICE_ACTION_IN_16: 4096 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4097 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4098 else 4099 ata_scsi_invalid_field(dev, cmd, 1); 4100 break; 4101 4102 case REPORT_LUNS: 4103 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4104 break; 4105 4106 case REQUEST_SENSE: 4107 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4108 cmd->result = (DRIVER_SENSE << 24); 4109 cmd->scsi_done(cmd); 4110 break; 4111 4112 /* if we reach this, then writeback caching is disabled, 4113 * turning this into a no-op. 4114 */ 4115 case SYNCHRONIZE_CACHE: 4116 /* fall through */ 4117 4118 /* no-op's, complete with success */ 4119 case REZERO_UNIT: 4120 case SEEK_6: 4121 case SEEK_10: 4122 case TEST_UNIT_READY: 4123 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 4124 break; 4125 4126 case SEND_DIAGNOSTIC: 4127 tmp8 = scsicmd[1] & ~(1 << 3); 4128 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) 4129 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 4130 else 4131 ata_scsi_invalid_field(dev, cmd, 1); 4132 break; 4133 4134 /* all other commands */ 4135 default: 4136 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4137 /* "Invalid command operation code" */ 4138 cmd->scsi_done(cmd); 4139 break; 4140 } 4141 } 4142 4143 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4144 { 4145 int i, rc; 4146 4147 for (i = 0; i < host->n_ports; i++) { 4148 struct ata_port *ap = host->ports[i]; 4149 struct Scsi_Host *shost; 4150 4151 rc = -ENOMEM; 4152 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4153 if (!shost) 4154 goto err_alloc; 4155 4156 shost->eh_noresume = 1; 4157 *(struct ata_port **)&shost->hostdata[0] = ap; 4158 ap->scsi_host = shost; 4159 4160 shost->transportt = ata_scsi_transport_template; 4161 shost->unique_id = ap->print_id; 4162 shost->max_id = 16; 4163 shost->max_lun = 1; 4164 shost->max_channel = 1; 4165 shost->max_cmd_len = 16; 4166 shost->no_write_same = 1; 4167 4168 /* Schedule policy is determined by ->qc_defer() 4169 * callback and it needs to see every deferred qc. 4170 * Set host_blocked to 1 to prevent SCSI midlayer from 4171 * automatically deferring requests. 4172 */ 4173 shost->max_host_blocked = 1; 4174 4175 rc = scsi_add_host_with_dma(ap->scsi_host, 4176 &ap->tdev, ap->host->dev); 4177 if (rc) 4178 goto err_add; 4179 } 4180 4181 return 0; 4182 4183 err_add: 4184 scsi_host_put(host->ports[i]->scsi_host); 4185 err_alloc: 4186 while (--i >= 0) { 4187 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4188 4189 scsi_remove_host(shost); 4190 scsi_host_put(shost); 4191 } 4192 return rc; 4193 } 4194 4195 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4196 { 4197 int tries = 5; 4198 struct ata_device *last_failed_dev = NULL; 4199 struct ata_link *link; 4200 struct ata_device *dev; 4201 4202 repeat: 4203 ata_for_each_link(link, ap, EDGE) { 4204 ata_for_each_dev(dev, link, ENABLED) { 4205 struct scsi_device *sdev; 4206 int channel = 0, id = 0; 4207 4208 if (dev->sdev) 4209 continue; 4210 4211 if (ata_is_host_link(link)) 4212 id = dev->devno; 4213 else 4214 channel = link->pmp; 4215 4216 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4217 NULL); 4218 if (!IS_ERR(sdev)) { 4219 dev->sdev = sdev; 4220 scsi_device_put(sdev); 4221 } else { 4222 dev->sdev = NULL; 4223 } 4224 } 4225 } 4226 4227 /* If we scanned while EH was in progress or allocation 4228 * failure occurred, scan would have failed silently. Check 4229 * whether all devices are attached. 4230 */ 4231 ata_for_each_link(link, ap, EDGE) { 4232 ata_for_each_dev(dev, link, ENABLED) { 4233 if (!dev->sdev) 4234 goto exit_loop; 4235 } 4236 } 4237 exit_loop: 4238 if (!link) 4239 return; 4240 4241 /* we're missing some SCSI devices */ 4242 if (sync) { 4243 /* If caller requested synchrnous scan && we've made 4244 * any progress, sleep briefly and repeat. 4245 */ 4246 if (dev != last_failed_dev) { 4247 msleep(100); 4248 last_failed_dev = dev; 4249 goto repeat; 4250 } 4251 4252 /* We might be failing to detect boot device, give it 4253 * a few more chances. 4254 */ 4255 if (--tries) { 4256 msleep(100); 4257 goto repeat; 4258 } 4259 4260 ata_port_err(ap, 4261 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4262 } 4263 4264 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4265 round_jiffies_relative(HZ)); 4266 } 4267 4268 /** 4269 * ata_scsi_offline_dev - offline attached SCSI device 4270 * @dev: ATA device to offline attached SCSI device for 4271 * 4272 * This function is called from ata_eh_hotplug() and responsible 4273 * for taking the SCSI device attached to @dev offline. This 4274 * function is called with host lock which protects dev->sdev 4275 * against clearing. 4276 * 4277 * LOCKING: 4278 * spin_lock_irqsave(host lock) 4279 * 4280 * RETURNS: 4281 * 1 if attached SCSI device exists, 0 otherwise. 4282 */ 4283 int ata_scsi_offline_dev(struct ata_device *dev) 4284 { 4285 if (dev->sdev) { 4286 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4287 return 1; 4288 } 4289 return 0; 4290 } 4291 4292 /** 4293 * ata_scsi_remove_dev - remove attached SCSI device 4294 * @dev: ATA device to remove attached SCSI device for 4295 * 4296 * This function is called from ata_eh_scsi_hotplug() and 4297 * responsible for removing the SCSI device attached to @dev. 4298 * 4299 * LOCKING: 4300 * Kernel thread context (may sleep). 4301 */ 4302 static void ata_scsi_remove_dev(struct ata_device *dev) 4303 { 4304 struct ata_port *ap = dev->link->ap; 4305 struct scsi_device *sdev; 4306 unsigned long flags; 4307 4308 /* Alas, we need to grab scan_mutex to ensure SCSI device 4309 * state doesn't change underneath us and thus 4310 * scsi_device_get() always succeeds. The mutex locking can 4311 * be removed if there is __scsi_device_get() interface which 4312 * increments reference counts regardless of device state. 4313 */ 4314 mutex_lock(&ap->scsi_host->scan_mutex); 4315 spin_lock_irqsave(ap->lock, flags); 4316 4317 /* clearing dev->sdev is protected by host lock */ 4318 sdev = dev->sdev; 4319 dev->sdev = NULL; 4320 4321 if (sdev) { 4322 /* If user initiated unplug races with us, sdev can go 4323 * away underneath us after the host lock and 4324 * scan_mutex are released. Hold onto it. 4325 */ 4326 if (scsi_device_get(sdev) == 0) { 4327 /* The following ensures the attached sdev is 4328 * offline on return from ata_scsi_offline_dev() 4329 * regardless it wins or loses the race 4330 * against this function. 4331 */ 4332 scsi_device_set_state(sdev, SDEV_OFFLINE); 4333 } else { 4334 WARN_ON(1); 4335 sdev = NULL; 4336 } 4337 } 4338 4339 spin_unlock_irqrestore(ap->lock, flags); 4340 mutex_unlock(&ap->scsi_host->scan_mutex); 4341 4342 if (sdev) { 4343 ata_dev_info(dev, "detaching (SCSI %s)\n", 4344 dev_name(&sdev->sdev_gendev)); 4345 4346 scsi_remove_device(sdev); 4347 scsi_device_put(sdev); 4348 } 4349 } 4350 4351 static void ata_scsi_handle_link_detach(struct ata_link *link) 4352 { 4353 struct ata_port *ap = link->ap; 4354 struct ata_device *dev; 4355 4356 ata_for_each_dev(dev, link, ALL) { 4357 unsigned long flags; 4358 4359 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4360 continue; 4361 4362 spin_lock_irqsave(ap->lock, flags); 4363 dev->flags &= ~ATA_DFLAG_DETACHED; 4364 spin_unlock_irqrestore(ap->lock, flags); 4365 4366 if (zpodd_dev_enabled(dev)) 4367 zpodd_exit(dev); 4368 4369 ata_scsi_remove_dev(dev); 4370 } 4371 } 4372 4373 /** 4374 * ata_scsi_media_change_notify - send media change event 4375 * @dev: Pointer to the disk device with media change event 4376 * 4377 * Tell the block layer to send a media change notification 4378 * event. 4379 * 4380 * LOCKING: 4381 * spin_lock_irqsave(host lock) 4382 */ 4383 void ata_scsi_media_change_notify(struct ata_device *dev) 4384 { 4385 if (dev->sdev) 4386 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4387 GFP_ATOMIC); 4388 } 4389 4390 /** 4391 * ata_scsi_hotplug - SCSI part of hotplug 4392 * @work: Pointer to ATA port to perform SCSI hotplug on 4393 * 4394 * Perform SCSI part of hotplug. It's executed from a separate 4395 * workqueue after EH completes. This is necessary because SCSI 4396 * hot plugging requires working EH and hot unplugging is 4397 * synchronized with hot plugging with a mutex. 4398 * 4399 * LOCKING: 4400 * Kernel thread context (may sleep). 4401 */ 4402 void ata_scsi_hotplug(struct work_struct *work) 4403 { 4404 struct ata_port *ap = 4405 container_of(work, struct ata_port, hotplug_task.work); 4406 int i; 4407 4408 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4409 DPRINTK("ENTER/EXIT - unloading\n"); 4410 return; 4411 } 4412 4413 /* 4414 * XXX - UGLY HACK 4415 * 4416 * The block layer suspend/resume path is fundamentally broken due 4417 * to freezable kthreads and workqueue and may deadlock if a block 4418 * device gets removed while resume is in progress. I don't know 4419 * what the solution is short of removing freezable kthreads and 4420 * workqueues altogether. 4421 * 4422 * The following is an ugly hack to avoid kicking off device 4423 * removal while freezer is active. This is a joke but does avoid 4424 * this particular deadlock scenario. 4425 * 4426 * https://bugzilla.kernel.org/show_bug.cgi?id=62801 4427 * http://marc.info/?l=linux-kernel&m=138695698516487 4428 */ 4429 #ifdef CONFIG_FREEZER 4430 while (pm_freezing) 4431 msleep(10); 4432 #endif 4433 4434 DPRINTK("ENTER\n"); 4435 mutex_lock(&ap->scsi_scan_mutex); 4436 4437 /* Unplug detached devices. We cannot use link iterator here 4438 * because PMP links have to be scanned even if PMP is 4439 * currently not attached. Iterate manually. 4440 */ 4441 ata_scsi_handle_link_detach(&ap->link); 4442 if (ap->pmp_link) 4443 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4444 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4445 4446 /* scan for new ones */ 4447 ata_scsi_scan_host(ap, 0); 4448 4449 mutex_unlock(&ap->scsi_scan_mutex); 4450 DPRINTK("EXIT\n"); 4451 } 4452 4453 /** 4454 * ata_scsi_user_scan - indication for user-initiated bus scan 4455 * @shost: SCSI host to scan 4456 * @channel: Channel to scan 4457 * @id: ID to scan 4458 * @lun: LUN to scan 4459 * 4460 * This function is called when user explicitly requests bus 4461 * scan. Set probe pending flag and invoke EH. 4462 * 4463 * LOCKING: 4464 * SCSI layer (we don't care) 4465 * 4466 * RETURNS: 4467 * Zero. 4468 */ 4469 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4470 unsigned int id, u64 lun) 4471 { 4472 struct ata_port *ap = ata_shost_to_port(shost); 4473 unsigned long flags; 4474 int devno, rc = 0; 4475 4476 if (!ap->ops->error_handler) 4477 return -EOPNOTSUPP; 4478 4479 if (lun != SCAN_WILD_CARD && lun) 4480 return -EINVAL; 4481 4482 if (!sata_pmp_attached(ap)) { 4483 if (channel != SCAN_WILD_CARD && channel) 4484 return -EINVAL; 4485 devno = id; 4486 } else { 4487 if (id != SCAN_WILD_CARD && id) 4488 return -EINVAL; 4489 devno = channel; 4490 } 4491 4492 spin_lock_irqsave(ap->lock, flags); 4493 4494 if (devno == SCAN_WILD_CARD) { 4495 struct ata_link *link; 4496 4497 ata_for_each_link(link, ap, EDGE) { 4498 struct ata_eh_info *ehi = &link->eh_info; 4499 ehi->probe_mask |= ATA_ALL_DEVICES; 4500 ehi->action |= ATA_EH_RESET; 4501 } 4502 } else { 4503 struct ata_device *dev = ata_find_dev(ap, devno); 4504 4505 if (dev) { 4506 struct ata_eh_info *ehi = &dev->link->eh_info; 4507 ehi->probe_mask |= 1 << dev->devno; 4508 ehi->action |= ATA_EH_RESET; 4509 } else 4510 rc = -EINVAL; 4511 } 4512 4513 if (rc == 0) { 4514 ata_port_schedule_eh(ap); 4515 spin_unlock_irqrestore(ap->lock, flags); 4516 ata_port_wait_eh(ap); 4517 } else 4518 spin_unlock_irqrestore(ap->lock, flags); 4519 4520 return rc; 4521 } 4522 4523 /** 4524 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4525 * @work: Pointer to ATA port to perform scsi_rescan_device() 4526 * 4527 * After ATA pass thru (SAT) commands are executed successfully, 4528 * libata need to propagate the changes to SCSI layer. 4529 * 4530 * LOCKING: 4531 * Kernel thread context (may sleep). 4532 */ 4533 void ata_scsi_dev_rescan(struct work_struct *work) 4534 { 4535 struct ata_port *ap = 4536 container_of(work, struct ata_port, scsi_rescan_task); 4537 struct ata_link *link; 4538 struct ata_device *dev; 4539 unsigned long flags; 4540 4541 mutex_lock(&ap->scsi_scan_mutex); 4542 spin_lock_irqsave(ap->lock, flags); 4543 4544 ata_for_each_link(link, ap, EDGE) { 4545 ata_for_each_dev(dev, link, ENABLED) { 4546 struct scsi_device *sdev = dev->sdev; 4547 4548 if (!sdev) 4549 continue; 4550 if (scsi_device_get(sdev)) 4551 continue; 4552 4553 spin_unlock_irqrestore(ap->lock, flags); 4554 scsi_rescan_device(&(sdev->sdev_gendev)); 4555 scsi_device_put(sdev); 4556 spin_lock_irqsave(ap->lock, flags); 4557 } 4558 } 4559 4560 spin_unlock_irqrestore(ap->lock, flags); 4561 mutex_unlock(&ap->scsi_scan_mutex); 4562 } 4563 4564 /** 4565 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 4566 * @host: ATA host container for all SAS ports 4567 * @port_info: Information from low-level host driver 4568 * @shost: SCSI host that the scsi device is attached to 4569 * 4570 * LOCKING: 4571 * PCI/etc. bus probe sem. 4572 * 4573 * RETURNS: 4574 * ata_port pointer on success / NULL on failure. 4575 */ 4576 4577 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 4578 struct ata_port_info *port_info, 4579 struct Scsi_Host *shost) 4580 { 4581 struct ata_port *ap; 4582 4583 ap = ata_port_alloc(host); 4584 if (!ap) 4585 return NULL; 4586 4587 ap->port_no = 0; 4588 ap->lock = &host->lock; 4589 ap->pio_mask = port_info->pio_mask; 4590 ap->mwdma_mask = port_info->mwdma_mask; 4591 ap->udma_mask = port_info->udma_mask; 4592 ap->flags |= port_info->flags; 4593 ap->ops = port_info->port_ops; 4594 ap->cbl = ATA_CBL_SATA; 4595 4596 return ap; 4597 } 4598 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 4599 4600 /** 4601 * ata_sas_port_start - Set port up for dma. 4602 * @ap: Port to initialize 4603 * 4604 * Called just after data structures for each port are 4605 * initialized. 4606 * 4607 * May be used as the port_start() entry in ata_port_operations. 4608 * 4609 * LOCKING: 4610 * Inherited from caller. 4611 */ 4612 int ata_sas_port_start(struct ata_port *ap) 4613 { 4614 /* 4615 * the port is marked as frozen at allocation time, but if we don't 4616 * have new eh, we won't thaw it 4617 */ 4618 if (!ap->ops->error_handler) 4619 ap->pflags &= ~ATA_PFLAG_FROZEN; 4620 return 0; 4621 } 4622 EXPORT_SYMBOL_GPL(ata_sas_port_start); 4623 4624 /** 4625 * ata_port_stop - Undo ata_sas_port_start() 4626 * @ap: Port to shut down 4627 * 4628 * May be used as the port_stop() entry in ata_port_operations. 4629 * 4630 * LOCKING: 4631 * Inherited from caller. 4632 */ 4633 4634 void ata_sas_port_stop(struct ata_port *ap) 4635 { 4636 } 4637 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 4638 4639 /** 4640 * ata_sas_async_probe - simply schedule probing and return 4641 * @ap: Port to probe 4642 * 4643 * For batch scheduling of probe for sas attached ata devices, assumes 4644 * the port has already been through ata_sas_port_init() 4645 */ 4646 void ata_sas_async_probe(struct ata_port *ap) 4647 { 4648 __ata_port_probe(ap); 4649 } 4650 EXPORT_SYMBOL_GPL(ata_sas_async_probe); 4651 4652 int ata_sas_sync_probe(struct ata_port *ap) 4653 { 4654 return ata_port_probe(ap); 4655 } 4656 EXPORT_SYMBOL_GPL(ata_sas_sync_probe); 4657 4658 4659 /** 4660 * ata_sas_port_init - Initialize a SATA device 4661 * @ap: SATA port to initialize 4662 * 4663 * LOCKING: 4664 * PCI/etc. bus probe sem. 4665 * 4666 * RETURNS: 4667 * Zero on success, non-zero on error. 4668 */ 4669 4670 int ata_sas_port_init(struct ata_port *ap) 4671 { 4672 int rc = ap->ops->port_start(ap); 4673 4674 if (rc) 4675 return rc; 4676 ap->print_id = atomic_inc_return(&ata_print_id); 4677 return 0; 4678 } 4679 EXPORT_SYMBOL_GPL(ata_sas_port_init); 4680 4681 /** 4682 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 4683 * @ap: SATA port to destroy 4684 * 4685 */ 4686 4687 void ata_sas_port_destroy(struct ata_port *ap) 4688 { 4689 if (ap->ops->port_stop) 4690 ap->ops->port_stop(ap); 4691 kfree(ap); 4692 } 4693 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 4694 4695 /** 4696 * ata_sas_slave_configure - Default slave_config routine for libata devices 4697 * @sdev: SCSI device to configure 4698 * @ap: ATA port to which SCSI device is attached 4699 * 4700 * RETURNS: 4701 * Zero. 4702 */ 4703 4704 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 4705 { 4706 ata_scsi_sdev_config(sdev); 4707 ata_scsi_dev_config(sdev, ap->link.device); 4708 return 0; 4709 } 4710 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 4711 4712 /** 4713 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 4714 * @cmd: SCSI command to be sent 4715 * @ap: ATA port to which the command is being sent 4716 * 4717 * RETURNS: 4718 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4719 * 0 otherwise. 4720 */ 4721 4722 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 4723 { 4724 int rc = 0; 4725 4726 ata_scsi_dump_cdb(ap, cmd); 4727 4728 if (likely(ata_dev_enabled(ap->link.device))) 4729 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 4730 else { 4731 cmd->result = (DID_BAD_TARGET << 16); 4732 cmd->scsi_done(cmd); 4733 } 4734 return rc; 4735 } 4736 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 4737 4738 int ata_sas_allocate_tag(struct ata_port *ap) 4739 { 4740 unsigned int max_queue = ap->host->n_tags; 4741 unsigned int i, tag; 4742 4743 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) { 4744 tag = tag < max_queue ? tag : 0; 4745 4746 /* the last tag is reserved for internal command. */ 4747 if (tag == ATA_TAG_INTERNAL) 4748 continue; 4749 4750 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) { 4751 ap->sas_last_tag = tag; 4752 return tag; 4753 } 4754 } 4755 return -1; 4756 } 4757 4758 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) 4759 { 4760 clear_bit(tag, &ap->sas_tag_allocated); 4761 } 4762