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 CDB" */ 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) || op_is_write(req_op(rq))) 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 0x03, 2079 0x00 /* 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 0, 2102 0, 2103 2 2104 }; 2105 2106 VPRINTK("ENTER\n"); 2107 2108 /* set scsi removable (RMB) bit per ata bit, or if the 2109 * AHCI port says it's external (Hotplug-capable, eSATA). 2110 */ 2111 if (ata_id_removable(args->id) || 2112 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 2113 hdr[1] |= (1 << 7); 2114 2115 if (args->dev->class == ATA_DEV_ZAC) { 2116 hdr[0] = TYPE_ZBC; 2117 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 2118 } 2119 2120 memcpy(rbuf, hdr, sizeof(hdr)); 2121 memcpy(&rbuf[8], "ATA ", 8); 2122 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 2123 2124 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2125 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2126 if (strncmp(&rbuf[32], " ", 4) == 0) 2127 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2128 2129 if (rbuf[32] == 0 || rbuf[32] == ' ') 2130 memcpy(&rbuf[32], "n/a ", 4); 2131 2132 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 2133 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2134 else 2135 memcpy(rbuf + 58, versions, sizeof(versions)); 2136 2137 return 0; 2138 } 2139 2140 /** 2141 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2142 * @args: device IDENTIFY data / SCSI command of interest. 2143 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2144 * 2145 * Returns list of inquiry VPD pages available. 2146 * 2147 * LOCKING: 2148 * spin_lock_irqsave(host lock) 2149 */ 2150 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 2151 { 2152 int num_pages; 2153 const u8 pages[] = { 2154 0x00, /* page 0x00, this page */ 2155 0x80, /* page 0x80, unit serial no page */ 2156 0x83, /* page 0x83, device ident page */ 2157 0x89, /* page 0x89, ata info page */ 2158 0xb0, /* page 0xb0, block limits page */ 2159 0xb1, /* page 0xb1, block device characteristics page */ 2160 0xb2, /* page 0xb2, thin provisioning page */ 2161 0xb6, /* page 0xb6, zoned block device characteristics */ 2162 }; 2163 2164 num_pages = sizeof(pages); 2165 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 2166 num_pages--; 2167 rbuf[3] = num_pages; /* number of supported VPD pages */ 2168 memcpy(rbuf + 4, pages, num_pages); 2169 return 0; 2170 } 2171 2172 /** 2173 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2174 * @args: device IDENTIFY data / SCSI command of interest. 2175 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2176 * 2177 * Returns ATA device serial number. 2178 * 2179 * LOCKING: 2180 * spin_lock_irqsave(host lock) 2181 */ 2182 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2183 { 2184 const u8 hdr[] = { 2185 0, 2186 0x80, /* this page code */ 2187 0, 2188 ATA_ID_SERNO_LEN, /* page len */ 2189 }; 2190 2191 memcpy(rbuf, hdr, sizeof(hdr)); 2192 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2193 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2194 return 0; 2195 } 2196 2197 /** 2198 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2199 * @args: device IDENTIFY data / SCSI command of interest. 2200 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2201 * 2202 * Yields two logical unit device identification designators: 2203 * - vendor specific ASCII containing the ATA serial number 2204 * - SAT defined "t10 vendor id based" containing ASCII vendor 2205 * name ("ATA "), model and serial numbers. 2206 * 2207 * LOCKING: 2208 * spin_lock_irqsave(host lock) 2209 */ 2210 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2211 { 2212 const int sat_model_serial_desc_len = 68; 2213 int num; 2214 2215 rbuf[1] = 0x83; /* this page code */ 2216 num = 4; 2217 2218 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2219 rbuf[num + 0] = 2; 2220 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2221 num += 4; 2222 ata_id_string(args->id, (unsigned char *) rbuf + num, 2223 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2224 num += ATA_ID_SERNO_LEN; 2225 2226 /* SAT defined lu model and serial numbers descriptor */ 2227 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2228 rbuf[num + 0] = 2; 2229 rbuf[num + 1] = 1; 2230 rbuf[num + 3] = sat_model_serial_desc_len; 2231 num += 4; 2232 memcpy(rbuf + num, "ATA ", 8); 2233 num += 8; 2234 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2235 ATA_ID_PROD_LEN); 2236 num += ATA_ID_PROD_LEN; 2237 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2238 ATA_ID_SERNO_LEN); 2239 num += ATA_ID_SERNO_LEN; 2240 2241 if (ata_id_has_wwn(args->id)) { 2242 /* SAT defined lu world wide name */ 2243 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2244 rbuf[num + 0] = 1; 2245 rbuf[num + 1] = 3; 2246 rbuf[num + 3] = ATA_ID_WWN_LEN; 2247 num += 4; 2248 ata_id_string(args->id, (unsigned char *) rbuf + num, 2249 ATA_ID_WWN, ATA_ID_WWN_LEN); 2250 num += ATA_ID_WWN_LEN; 2251 } 2252 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2253 return 0; 2254 } 2255 2256 /** 2257 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2258 * @args: device IDENTIFY data / SCSI command of interest. 2259 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2260 * 2261 * Yields SAT-specified ATA VPD page. 2262 * 2263 * LOCKING: 2264 * spin_lock_irqsave(host lock) 2265 */ 2266 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2267 { 2268 struct ata_taskfile tf; 2269 2270 memset(&tf, 0, sizeof(tf)); 2271 2272 rbuf[1] = 0x89; /* our page code */ 2273 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2274 rbuf[3] = (0x238 & 0xff); 2275 2276 memcpy(&rbuf[8], "linux ", 8); 2277 memcpy(&rbuf[16], "libata ", 16); 2278 memcpy(&rbuf[32], DRV_VERSION, 4); 2279 2280 /* we don't store the ATA device signature, so we fake it */ 2281 2282 tf.command = ATA_DRDY; /* really, this is Status reg */ 2283 tf.lbal = 0x1; 2284 tf.nsect = 0x1; 2285 2286 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2287 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2288 2289 rbuf[56] = ATA_CMD_ID_ATA; 2290 2291 memcpy(&rbuf[60], &args->id[0], 512); 2292 return 0; 2293 } 2294 2295 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2296 { 2297 u16 min_io_sectors; 2298 2299 rbuf[1] = 0xb0; 2300 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2301 2302 /* 2303 * Optimal transfer length granularity. 2304 * 2305 * This is always one physical block, but for disks with a smaller 2306 * logical than physical sector size we need to figure out what the 2307 * latter is. 2308 */ 2309 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2310 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2311 2312 /* 2313 * Optimal unmap granularity. 2314 * 2315 * The ATA spec doesn't even know about a granularity or alignment 2316 * for the TRIM command. We can leave away most of the unmap related 2317 * VPD page entries, but we have specifify a granularity to signal 2318 * that we support some form of unmap - in thise case via WRITE SAME 2319 * with the unmap bit set. 2320 */ 2321 if (ata_id_has_trim(args->id)) { 2322 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); 2323 put_unaligned_be32(1, &rbuf[28]); 2324 } 2325 2326 return 0; 2327 } 2328 2329 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2330 { 2331 int form_factor = ata_id_form_factor(args->id); 2332 int media_rotation_rate = ata_id_rotation_rate(args->id); 2333 u8 zoned = ata_id_zoned_cap(args->id); 2334 2335 rbuf[1] = 0xb1; 2336 rbuf[3] = 0x3c; 2337 rbuf[4] = media_rotation_rate >> 8; 2338 rbuf[5] = media_rotation_rate; 2339 rbuf[7] = form_factor; 2340 if (zoned) 2341 rbuf[8] = (zoned << 4); 2342 2343 return 0; 2344 } 2345 2346 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2347 { 2348 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2349 rbuf[1] = 0xb2; 2350 rbuf[3] = 0x4; 2351 rbuf[5] = 1 << 6; /* TPWS */ 2352 2353 return 0; 2354 } 2355 2356 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2357 { 2358 /* 2359 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2360 */ 2361 rbuf[1] = 0xb6; 2362 rbuf[3] = 0x3C; 2363 2364 /* 2365 * URSWRZ bit is only meaningful for host-managed ZAC drives 2366 */ 2367 if (args->dev->zac_zoned_cap & 1) 2368 rbuf[4] |= 1; 2369 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2370 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2371 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2372 2373 return 0; 2374 } 2375 2376 /** 2377 * ata_scsiop_noop - Command handler that simply returns success. 2378 * @args: device IDENTIFY data / SCSI command of interest. 2379 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2380 * 2381 * No operation. Simply returns success to caller, to indicate 2382 * that the caller should successfully complete this SCSI command. 2383 * 2384 * LOCKING: 2385 * spin_lock_irqsave(host lock) 2386 */ 2387 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) 2388 { 2389 VPRINTK("ENTER\n"); 2390 return 0; 2391 } 2392 2393 /** 2394 * modecpy - Prepare response for MODE SENSE 2395 * @dest: output buffer 2396 * @src: data being copied 2397 * @n: length of mode page 2398 * @changeable: whether changeable parameters are requested 2399 * 2400 * Generate a generic MODE SENSE page for either current or changeable 2401 * parameters. 2402 * 2403 * LOCKING: 2404 * None. 2405 */ 2406 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2407 { 2408 if (changeable) { 2409 memcpy(dest, src, 2); 2410 memset(dest + 2, 0, n - 2); 2411 } else { 2412 memcpy(dest, src, n); 2413 } 2414 } 2415 2416 /** 2417 * ata_msense_caching - Simulate MODE SENSE caching info page 2418 * @id: device IDENTIFY data 2419 * @buf: output buffer 2420 * @changeable: whether changeable parameters are requested 2421 * 2422 * Generate a caching info page, which conditionally indicates 2423 * write caching to the SCSI layer, depending on device 2424 * capabilities. 2425 * 2426 * LOCKING: 2427 * None. 2428 */ 2429 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2430 { 2431 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2432 if (changeable) { 2433 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2434 } else { 2435 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2436 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2437 } 2438 return sizeof(def_cache_mpage); 2439 } 2440 2441 /** 2442 * ata_msense_control - Simulate MODE SENSE control mode page 2443 * @dev: ATA device of interest 2444 * @buf: output buffer 2445 * @changeable: whether changeable parameters are requested 2446 * 2447 * Generate a generic MODE SENSE control mode page. 2448 * 2449 * LOCKING: 2450 * None. 2451 */ 2452 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2453 bool changeable) 2454 { 2455 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2456 if (changeable) { 2457 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2458 } else { 2459 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2460 2461 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2462 } 2463 return sizeof(def_control_mpage); 2464 } 2465 2466 /** 2467 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2468 * @buf: output buffer 2469 * @changeable: whether changeable parameters are requested 2470 * 2471 * Generate a generic MODE SENSE r/w error recovery page. 2472 * 2473 * LOCKING: 2474 * None. 2475 */ 2476 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2477 { 2478 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2479 changeable); 2480 return sizeof(def_rw_recovery_mpage); 2481 } 2482 2483 /* 2484 * We can turn this into a real blacklist if it's needed, for now just 2485 * blacklist any Maxtor BANC1G10 revision firmware 2486 */ 2487 static int ata_dev_supports_fua(u16 *id) 2488 { 2489 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2490 2491 if (!libata_fua) 2492 return 0; 2493 if (!ata_id_has_fua(id)) 2494 return 0; 2495 2496 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2497 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2498 2499 if (strcmp(model, "Maxtor")) 2500 return 1; 2501 if (strcmp(fw, "BANC1G10")) 2502 return 1; 2503 2504 return 0; /* blacklisted */ 2505 } 2506 2507 /** 2508 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2509 * @args: device IDENTIFY data / SCSI command of interest. 2510 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2511 * 2512 * Simulate MODE SENSE commands. Assume this is invoked for direct 2513 * access devices (e.g. disks) only. There should be no block 2514 * descriptor for other device types. 2515 * 2516 * LOCKING: 2517 * spin_lock_irqsave(host lock) 2518 */ 2519 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2520 { 2521 struct ata_device *dev = args->dev; 2522 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2523 const u8 sat_blk_desc[] = { 2524 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2525 0, 2526 0, 0x2, 0x0 /* block length: 512 bytes */ 2527 }; 2528 u8 pg, spg; 2529 unsigned int ebd, page_control, six_byte; 2530 u8 dpofua, bp = 0xff; 2531 u16 fp; 2532 2533 VPRINTK("ENTER\n"); 2534 2535 six_byte = (scsicmd[0] == MODE_SENSE); 2536 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2537 /* 2538 * LLBA bit in msense(10) ignored (compliant) 2539 */ 2540 2541 page_control = scsicmd[2] >> 6; 2542 switch (page_control) { 2543 case 0: /* current */ 2544 case 1: /* changeable */ 2545 case 2: /* defaults */ 2546 break; /* supported */ 2547 case 3: /* saved */ 2548 goto saving_not_supp; 2549 default: 2550 fp = 2; 2551 bp = 6; 2552 goto invalid_fld; 2553 } 2554 2555 if (six_byte) 2556 p += 4 + (ebd ? 8 : 0); 2557 else 2558 p += 8 + (ebd ? 8 : 0); 2559 2560 pg = scsicmd[2] & 0x3f; 2561 spg = scsicmd[3]; 2562 /* 2563 * No mode subpages supported (yet) but asking for _all_ 2564 * subpages may be valid 2565 */ 2566 if (spg && (spg != ALL_SUB_MPAGES)) { 2567 fp = 3; 2568 goto invalid_fld; 2569 } 2570 2571 switch(pg) { 2572 case RW_RECOVERY_MPAGE: 2573 p += ata_msense_rw_recovery(p, page_control == 1); 2574 break; 2575 2576 case CACHE_MPAGE: 2577 p += ata_msense_caching(args->id, p, page_control == 1); 2578 break; 2579 2580 case CONTROL_MPAGE: 2581 p += ata_msense_control(args->dev, p, page_control == 1); 2582 break; 2583 2584 case ALL_MPAGES: 2585 p += ata_msense_rw_recovery(p, page_control == 1); 2586 p += ata_msense_caching(args->id, p, page_control == 1); 2587 p += ata_msense_control(args->dev, p, page_control == 1); 2588 break; 2589 2590 default: /* invalid page code */ 2591 fp = 2; 2592 goto invalid_fld; 2593 } 2594 2595 dpofua = 0; 2596 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2597 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2598 dpofua = 1 << 4; 2599 2600 if (six_byte) { 2601 rbuf[0] = p - rbuf - 1; 2602 rbuf[2] |= dpofua; 2603 if (ebd) { 2604 rbuf[3] = sizeof(sat_blk_desc); 2605 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2606 } 2607 } else { 2608 unsigned int output_len = p - rbuf - 2; 2609 2610 rbuf[0] = output_len >> 8; 2611 rbuf[1] = output_len; 2612 rbuf[3] |= dpofua; 2613 if (ebd) { 2614 rbuf[7] = sizeof(sat_blk_desc); 2615 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2616 } 2617 } 2618 return 0; 2619 2620 invalid_fld: 2621 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2622 return 1; 2623 2624 saving_not_supp: 2625 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2626 /* "Saving parameters not supported" */ 2627 return 1; 2628 } 2629 2630 /** 2631 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2632 * @args: device IDENTIFY data / SCSI command of interest. 2633 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2634 * 2635 * Simulate READ CAPACITY commands. 2636 * 2637 * LOCKING: 2638 * None. 2639 */ 2640 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2641 { 2642 struct ata_device *dev = args->dev; 2643 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2644 u32 sector_size; /* physical sector size in bytes */ 2645 u8 log2_per_phys; 2646 u16 lowest_aligned; 2647 2648 sector_size = ata_id_logical_sector_size(dev->id); 2649 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2650 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2651 2652 VPRINTK("ENTER\n"); 2653 2654 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2655 if (last_lba >= 0xffffffffULL) 2656 last_lba = 0xffffffff; 2657 2658 /* sector count, 32-bit */ 2659 rbuf[0] = last_lba >> (8 * 3); 2660 rbuf[1] = last_lba >> (8 * 2); 2661 rbuf[2] = last_lba >> (8 * 1); 2662 rbuf[3] = last_lba; 2663 2664 /* sector size */ 2665 rbuf[4] = sector_size >> (8 * 3); 2666 rbuf[5] = sector_size >> (8 * 2); 2667 rbuf[6] = sector_size >> (8 * 1); 2668 rbuf[7] = sector_size; 2669 } else { 2670 /* sector count, 64-bit */ 2671 rbuf[0] = last_lba >> (8 * 7); 2672 rbuf[1] = last_lba >> (8 * 6); 2673 rbuf[2] = last_lba >> (8 * 5); 2674 rbuf[3] = last_lba >> (8 * 4); 2675 rbuf[4] = last_lba >> (8 * 3); 2676 rbuf[5] = last_lba >> (8 * 2); 2677 rbuf[6] = last_lba >> (8 * 1); 2678 rbuf[7] = last_lba; 2679 2680 /* sector size */ 2681 rbuf[ 8] = sector_size >> (8 * 3); 2682 rbuf[ 9] = sector_size >> (8 * 2); 2683 rbuf[10] = sector_size >> (8 * 1); 2684 rbuf[11] = sector_size; 2685 2686 rbuf[12] = 0; 2687 rbuf[13] = log2_per_phys; 2688 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2689 rbuf[15] = lowest_aligned; 2690 2691 if (ata_id_has_trim(args->id) && 2692 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2693 rbuf[14] |= 0x80; /* LBPME */ 2694 2695 if (ata_id_has_zero_after_trim(args->id) && 2696 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2697 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2698 rbuf[14] |= 0x40; /* LBPRZ */ 2699 } 2700 } 2701 if (ata_id_zoned_cap(args->id) || 2702 args->dev->class == ATA_DEV_ZAC) 2703 rbuf[12] = (1 << 4); /* RC_BASIS */ 2704 } 2705 return 0; 2706 } 2707 2708 /** 2709 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2710 * @args: device IDENTIFY data / SCSI command of interest. 2711 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2712 * 2713 * Simulate REPORT LUNS command. 2714 * 2715 * LOCKING: 2716 * spin_lock_irqsave(host lock) 2717 */ 2718 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2719 { 2720 VPRINTK("ENTER\n"); 2721 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2722 2723 return 0; 2724 } 2725 2726 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2727 { 2728 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2729 /* FIXME: not quite right; we don't want the 2730 * translation of taskfile registers into 2731 * a sense descriptors, since that's only 2732 * correct for ATA, not ATAPI 2733 */ 2734 ata_gen_passthru_sense(qc); 2735 } 2736 2737 ata_qc_done(qc); 2738 } 2739 2740 /* is it pointless to prefer PIO for "safety reasons"? */ 2741 static inline int ata_pio_use_silly(struct ata_port *ap) 2742 { 2743 return (ap->flags & ATA_FLAG_PIO_DMA); 2744 } 2745 2746 static void atapi_request_sense(struct ata_queued_cmd *qc) 2747 { 2748 struct ata_port *ap = qc->ap; 2749 struct scsi_cmnd *cmd = qc->scsicmd; 2750 2751 DPRINTK("ATAPI request sense\n"); 2752 2753 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2754 2755 #ifdef CONFIG_ATA_SFF 2756 if (ap->ops->sff_tf_read) 2757 ap->ops->sff_tf_read(ap, &qc->tf); 2758 #endif 2759 2760 /* fill these in, for the case where they are -not- overwritten */ 2761 cmd->sense_buffer[0] = 0x70; 2762 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2763 2764 ata_qc_reinit(qc); 2765 2766 /* setup sg table and init transfer direction */ 2767 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2768 ata_sg_init(qc, &qc->sgent, 1); 2769 qc->dma_dir = DMA_FROM_DEVICE; 2770 2771 memset(&qc->cdb, 0, qc->dev->cdb_len); 2772 qc->cdb[0] = REQUEST_SENSE; 2773 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2774 2775 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2776 qc->tf.command = ATA_CMD_PACKET; 2777 2778 if (ata_pio_use_silly(ap)) { 2779 qc->tf.protocol = ATAPI_PROT_DMA; 2780 qc->tf.feature |= ATAPI_PKT_DMA; 2781 } else { 2782 qc->tf.protocol = ATAPI_PROT_PIO; 2783 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2784 qc->tf.lbah = 0; 2785 } 2786 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2787 2788 qc->complete_fn = atapi_sense_complete; 2789 2790 ata_qc_issue(qc); 2791 2792 DPRINTK("EXIT\n"); 2793 } 2794 2795 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2796 { 2797 struct scsi_cmnd *cmd = qc->scsicmd; 2798 unsigned int err_mask = qc->err_mask; 2799 2800 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2801 2802 /* handle completion from new EH */ 2803 if (unlikely(qc->ap->ops->error_handler && 2804 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2805 2806 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2807 /* FIXME: not quite right; we don't want the 2808 * translation of taskfile registers into a 2809 * sense descriptors, since that's only 2810 * correct for ATA, not ATAPI 2811 */ 2812 ata_gen_passthru_sense(qc); 2813 } 2814 2815 /* SCSI EH automatically locks door if sdev->locked is 2816 * set. Sometimes door lock request continues to 2817 * fail, for example, when no media is present. This 2818 * creates a loop - SCSI EH issues door lock which 2819 * fails and gets invoked again to acquire sense data 2820 * for the failed command. 2821 * 2822 * If door lock fails, always clear sdev->locked to 2823 * avoid this infinite loop. 2824 * 2825 * This may happen before SCSI scan is complete. Make 2826 * sure qc->dev->sdev isn't NULL before dereferencing. 2827 */ 2828 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2829 qc->dev->sdev->locked = 0; 2830 2831 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2832 ata_qc_done(qc); 2833 return; 2834 } 2835 2836 /* successful completion or old EH failure path */ 2837 if (unlikely(err_mask & AC_ERR_DEV)) { 2838 cmd->result = SAM_STAT_CHECK_CONDITION; 2839 atapi_request_sense(qc); 2840 return; 2841 } else if (unlikely(err_mask)) { 2842 /* FIXME: not quite right; we don't want the 2843 * translation of taskfile registers into 2844 * a sense descriptors, since that's only 2845 * correct for ATA, not ATAPI 2846 */ 2847 ata_gen_passthru_sense(qc); 2848 } else { 2849 u8 *scsicmd = cmd->cmnd; 2850 2851 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { 2852 unsigned long flags; 2853 u8 *buf; 2854 2855 buf = ata_scsi_rbuf_get(cmd, true, &flags); 2856 2857 /* ATAPI devices typically report zero for their SCSI version, 2858 * and sometimes deviate from the spec WRT response data 2859 * format. If SCSI version is reported as zero like normal, 2860 * then we make the following fixups: 1) Fake MMC-5 version, 2861 * to indicate to the Linux scsi midlayer this is a modern 2862 * device. 2) Ensure response data format / ATAPI information 2863 * are always correct. 2864 */ 2865 if (buf[2] == 0) { 2866 buf[2] = 0x5; 2867 buf[3] = 0x32; 2868 } 2869 2870 ata_scsi_rbuf_put(cmd, true, &flags); 2871 } 2872 2873 cmd->result = SAM_STAT_GOOD; 2874 } 2875 2876 ata_qc_done(qc); 2877 } 2878 /** 2879 * atapi_xlat - Initialize PACKET taskfile 2880 * @qc: command structure to be initialized 2881 * 2882 * LOCKING: 2883 * spin_lock_irqsave(host lock) 2884 * 2885 * RETURNS: 2886 * Zero on success, non-zero on failure. 2887 */ 2888 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2889 { 2890 struct scsi_cmnd *scmd = qc->scsicmd; 2891 struct ata_device *dev = qc->dev; 2892 int nodata = (scmd->sc_data_direction == DMA_NONE); 2893 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2894 unsigned int nbytes; 2895 2896 memset(qc->cdb, 0, dev->cdb_len); 2897 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2898 2899 qc->complete_fn = atapi_qc_complete; 2900 2901 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2902 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2903 qc->tf.flags |= ATA_TFLAG_WRITE; 2904 DPRINTK("direction: write\n"); 2905 } 2906 2907 qc->tf.command = ATA_CMD_PACKET; 2908 ata_qc_set_pc_nbytes(qc); 2909 2910 /* check whether ATAPI DMA is safe */ 2911 if (!nodata && !using_pio && atapi_check_dma(qc)) 2912 using_pio = 1; 2913 2914 /* Some controller variants snoop this value for Packet 2915 * transfers to do state machine and FIFO management. Thus we 2916 * want to set it properly, and for DMA where it is 2917 * effectively meaningless. 2918 */ 2919 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2920 2921 /* Most ATAPI devices which honor transfer chunk size don't 2922 * behave according to the spec when odd chunk size which 2923 * matches the transfer length is specified. If the number of 2924 * bytes to transfer is 2n+1. According to the spec, what 2925 * should happen is to indicate that 2n+1 is going to be 2926 * transferred and transfer 2n+2 bytes where the last byte is 2927 * padding. 2928 * 2929 * In practice, this doesn't happen. ATAPI devices first 2930 * indicate and transfer 2n bytes and then indicate and 2931 * transfer 2 bytes where the last byte is padding. 2932 * 2933 * This inconsistency confuses several controllers which 2934 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2935 * These controllers use actual number of transferred bytes to 2936 * update DMA poitner and transfer of 4n+2 bytes make those 2937 * controller push DMA pointer by 4n+4 bytes because SATA data 2938 * FISes are aligned to 4 bytes. This causes data corruption 2939 * and buffer overrun. 2940 * 2941 * Always setting nbytes to even number solves this problem 2942 * because then ATAPI devices don't have to split data at 2n 2943 * boundaries. 2944 */ 2945 if (nbytes & 0x1) 2946 nbytes++; 2947 2948 qc->tf.lbam = (nbytes & 0xFF); 2949 qc->tf.lbah = (nbytes >> 8); 2950 2951 if (nodata) 2952 qc->tf.protocol = ATAPI_PROT_NODATA; 2953 else if (using_pio) 2954 qc->tf.protocol = ATAPI_PROT_PIO; 2955 else { 2956 /* DMA data xfer */ 2957 qc->tf.protocol = ATAPI_PROT_DMA; 2958 qc->tf.feature |= ATAPI_PKT_DMA; 2959 2960 if ((dev->flags & ATA_DFLAG_DMADIR) && 2961 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2962 /* some SATA bridges need us to indicate data xfer direction */ 2963 qc->tf.feature |= ATAPI_DMADIR; 2964 } 2965 2966 2967 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2968 as ATAPI tape drives don't get this right otherwise */ 2969 return 0; 2970 } 2971 2972 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2973 { 2974 if (!sata_pmp_attached(ap)) { 2975 if (likely(devno < ata_link_max_devices(&ap->link))) 2976 return &ap->link.device[devno]; 2977 } else { 2978 if (likely(devno < ap->nr_pmp_links)) 2979 return &ap->pmp_link[devno].device[0]; 2980 } 2981 2982 return NULL; 2983 } 2984 2985 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2986 const struct scsi_device *scsidev) 2987 { 2988 int devno; 2989 2990 /* skip commands not addressed to targets we simulate */ 2991 if (!sata_pmp_attached(ap)) { 2992 if (unlikely(scsidev->channel || scsidev->lun)) 2993 return NULL; 2994 devno = scsidev->id; 2995 } else { 2996 if (unlikely(scsidev->id || scsidev->lun)) 2997 return NULL; 2998 devno = scsidev->channel; 2999 } 3000 3001 return ata_find_dev(ap, devno); 3002 } 3003 3004 /** 3005 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3006 * @ap: ATA port to which the device is attached 3007 * @scsidev: SCSI device from which we derive the ATA device 3008 * 3009 * Given various information provided in struct scsi_cmnd, 3010 * map that onto an ATA bus, and using that mapping 3011 * determine which ata_device is associated with the 3012 * SCSI command to be sent. 3013 * 3014 * LOCKING: 3015 * spin_lock_irqsave(host lock) 3016 * 3017 * RETURNS: 3018 * Associated ATA device, or %NULL if not found. 3019 */ 3020 static struct ata_device * 3021 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3022 { 3023 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3024 3025 if (unlikely(!dev || !ata_dev_enabled(dev))) 3026 return NULL; 3027 3028 return dev; 3029 } 3030 3031 /* 3032 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3033 * @byte1: Byte 1 from pass-thru CDB. 3034 * 3035 * RETURNS: 3036 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3037 */ 3038 static u8 3039 ata_scsi_map_proto(u8 byte1) 3040 { 3041 switch((byte1 & 0x1e) >> 1) { 3042 case 3: /* Non-data */ 3043 return ATA_PROT_NODATA; 3044 3045 case 6: /* DMA */ 3046 case 10: /* UDMA Data-in */ 3047 case 11: /* UDMA Data-Out */ 3048 return ATA_PROT_DMA; 3049 3050 case 4: /* PIO Data-in */ 3051 case 5: /* PIO Data-out */ 3052 return ATA_PROT_PIO; 3053 3054 case 12: /* FPDMA */ 3055 return ATA_PROT_NCQ; 3056 3057 case 0: /* Hard Reset */ 3058 case 1: /* SRST */ 3059 case 8: /* Device Diagnostic */ 3060 case 9: /* Device Reset */ 3061 case 7: /* DMA Queued */ 3062 case 15: /* Return Response Info */ 3063 default: /* Reserved */ 3064 break; 3065 } 3066 3067 return ATA_PROT_UNKNOWN; 3068 } 3069 3070 /** 3071 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3072 * @qc: command structure to be initialized 3073 * 3074 * Handles either 12 or 16-byte versions of the CDB. 3075 * 3076 * RETURNS: 3077 * Zero on success, non-zero on failure. 3078 */ 3079 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3080 { 3081 struct ata_taskfile *tf = &(qc->tf); 3082 struct scsi_cmnd *scmd = qc->scsicmd; 3083 struct ata_device *dev = qc->dev; 3084 const u8 *cdb = scmd->cmnd; 3085 u16 fp; 3086 3087 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) { 3088 fp = 1; 3089 goto invalid_fld; 3090 } 3091 3092 if (ata_is_ncq(tf->protocol) && (cdb[2] & 0x3) == 0) 3093 tf->protocol = ATA_PROT_NCQ_NODATA; 3094 3095 /* enable LBA */ 3096 tf->flags |= ATA_TFLAG_LBA; 3097 3098 /* 3099 * 12 and 16 byte CDBs use different offsets to 3100 * provide the various register values. 3101 */ 3102 if (cdb[0] == ATA_16) { 3103 /* 3104 * 16-byte CDB - may contain extended commands. 3105 * 3106 * If that is the case, copy the upper byte register values. 3107 */ 3108 if (cdb[1] & 0x01) { 3109 tf->hob_feature = cdb[3]; 3110 tf->hob_nsect = cdb[5]; 3111 tf->hob_lbal = cdb[7]; 3112 tf->hob_lbam = cdb[9]; 3113 tf->hob_lbah = cdb[11]; 3114 tf->flags |= ATA_TFLAG_LBA48; 3115 } else 3116 tf->flags &= ~ATA_TFLAG_LBA48; 3117 3118 /* 3119 * Always copy low byte, device and command registers. 3120 */ 3121 tf->feature = cdb[4]; 3122 tf->nsect = cdb[6]; 3123 tf->lbal = cdb[8]; 3124 tf->lbam = cdb[10]; 3125 tf->lbah = cdb[12]; 3126 tf->device = cdb[13]; 3127 tf->command = cdb[14]; 3128 } else { 3129 /* 3130 * 12-byte CDB - incapable of extended commands. 3131 */ 3132 tf->flags &= ~ATA_TFLAG_LBA48; 3133 3134 tf->feature = cdb[3]; 3135 tf->nsect = cdb[4]; 3136 tf->lbal = cdb[5]; 3137 tf->lbam = cdb[6]; 3138 tf->lbah = cdb[7]; 3139 tf->device = cdb[8]; 3140 tf->command = cdb[9]; 3141 } 3142 3143 /* For NCQ commands copy the tag value */ 3144 if (ata_is_ncq(tf->protocol)) 3145 tf->nsect = qc->tag << 3; 3146 3147 /* enforce correct master/slave bit */ 3148 tf->device = dev->devno ? 3149 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3150 3151 switch (tf->command) { 3152 /* READ/WRITE LONG use a non-standard sect_size */ 3153 case ATA_CMD_READ_LONG: 3154 case ATA_CMD_READ_LONG_ONCE: 3155 case ATA_CMD_WRITE_LONG: 3156 case ATA_CMD_WRITE_LONG_ONCE: 3157 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3158 fp = 1; 3159 goto invalid_fld; 3160 } 3161 qc->sect_size = scsi_bufflen(scmd); 3162 break; 3163 3164 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3165 case ATA_CMD_CFA_WRITE_NE: 3166 case ATA_CMD_CFA_TRANS_SECT: 3167 case ATA_CMD_CFA_WRITE_MULT_NE: 3168 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3169 case ATA_CMD_READ: 3170 case ATA_CMD_READ_EXT: 3171 case ATA_CMD_READ_QUEUED: 3172 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3173 case ATA_CMD_FPDMA_READ: 3174 case ATA_CMD_READ_MULTI: 3175 case ATA_CMD_READ_MULTI_EXT: 3176 case ATA_CMD_PIO_READ: 3177 case ATA_CMD_PIO_READ_EXT: 3178 case ATA_CMD_READ_STREAM_DMA_EXT: 3179 case ATA_CMD_READ_STREAM_EXT: 3180 case ATA_CMD_VERIFY: 3181 case ATA_CMD_VERIFY_EXT: 3182 case ATA_CMD_WRITE: 3183 case ATA_CMD_WRITE_EXT: 3184 case ATA_CMD_WRITE_FUA_EXT: 3185 case ATA_CMD_WRITE_QUEUED: 3186 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3187 case ATA_CMD_FPDMA_WRITE: 3188 case ATA_CMD_WRITE_MULTI: 3189 case ATA_CMD_WRITE_MULTI_EXT: 3190 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3191 case ATA_CMD_PIO_WRITE: 3192 case ATA_CMD_PIO_WRITE_EXT: 3193 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3194 case ATA_CMD_WRITE_STREAM_EXT: 3195 qc->sect_size = scmd->device->sector_size; 3196 break; 3197 3198 /* Everything else uses 512 byte "sectors" */ 3199 default: 3200 qc->sect_size = ATA_SECT_SIZE; 3201 } 3202 3203 /* 3204 * Set flags so that all registers will be written, pass on 3205 * write indication (used for PIO/DMA setup), result TF is 3206 * copied back and we don't whine too much about its failure. 3207 */ 3208 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3209 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3210 tf->flags |= ATA_TFLAG_WRITE; 3211 3212 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3213 3214 /* 3215 * Set transfer length. 3216 * 3217 * TODO: find out if we need to do more here to 3218 * cover scatter/gather case. 3219 */ 3220 ata_qc_set_pc_nbytes(qc); 3221 3222 /* We may not issue DMA commands if no DMA mode is set */ 3223 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3224 fp = 1; 3225 goto invalid_fld; 3226 } 3227 3228 /* sanity check for pio multi commands */ 3229 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3230 fp = 1; 3231 goto invalid_fld; 3232 } 3233 3234 if (is_multi_taskfile(tf)) { 3235 unsigned int multi_count = 1 << (cdb[1] >> 5); 3236 3237 /* compare the passed through multi_count 3238 * with the cached multi_count of libata 3239 */ 3240 if (multi_count != dev->multi_count) 3241 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3242 multi_count); 3243 } 3244 3245 /* 3246 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3247 * SET_FEATURES - XFER MODE must be preceded/succeeded 3248 * by an update to hardware-specific registers for each 3249 * controller (i.e. the reason for ->set_piomode(), 3250 * ->set_dmamode(), and ->post_set_mode() hooks). 3251 */ 3252 if (tf->command == ATA_CMD_SET_FEATURES && 3253 tf->feature == SETFEATURES_XFER) { 3254 fp = (cdb[0] == ATA_16) ? 4 : 3; 3255 goto invalid_fld; 3256 } 3257 3258 /* 3259 * Filter TPM commands by default. These provide an 3260 * essentially uncontrolled encrypted "back door" between 3261 * applications and the disk. Set libata.allow_tpm=1 if you 3262 * have a real reason for wanting to use them. This ensures 3263 * that installed software cannot easily mess stuff up without 3264 * user intent. DVR type users will probably ship with this enabled 3265 * for movie content management. 3266 * 3267 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3268 * for this and should do in future but that it is not sufficient as 3269 * DCS is an optional feature set. Thus we also do the software filter 3270 * so that we comply with the TC consortium stated goal that the user 3271 * can turn off TC features of their system. 3272 */ 3273 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3274 fp = (cdb[0] == ATA_16) ? 14 : 9; 3275 goto invalid_fld; 3276 } 3277 3278 return 0; 3279 3280 invalid_fld: 3281 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3282 return 1; 3283 } 3284 3285 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3286 { 3287 struct ata_taskfile *tf = &qc->tf; 3288 struct scsi_cmnd *scmd = qc->scsicmd; 3289 struct ata_device *dev = qc->dev; 3290 const u8 *cdb = scmd->cmnd; 3291 u64 block; 3292 u32 n_block; 3293 u32 size; 3294 void *buf; 3295 u16 fp; 3296 u8 bp = 0xff; 3297 3298 /* we may not issue DMA commands if no DMA mode is set */ 3299 if (unlikely(!dev->dma_mode)) 3300 goto invalid_opcode; 3301 3302 if (unlikely(scmd->cmd_len < 16)) { 3303 fp = 15; 3304 goto invalid_fld; 3305 } 3306 scsi_16_lba_len(cdb, &block, &n_block); 3307 3308 /* for now we only support WRITE SAME with the unmap bit set */ 3309 if (unlikely(!(cdb[1] & 0x8))) { 3310 fp = 1; 3311 bp = 3; 3312 goto invalid_fld; 3313 } 3314 3315 /* 3316 * WRITE SAME always has a sector sized buffer as payload, this 3317 * should never be a multiple entry S/G list. 3318 */ 3319 if (!scsi_sg_count(scmd)) 3320 goto invalid_param_len; 3321 3322 buf = page_address(sg_page(scsi_sglist(scmd))); 3323 3324 if (n_block <= 65535 * ATA_MAX_TRIM_RNUM) { 3325 size = ata_set_lba_range_entries(buf, ATA_MAX_TRIM_RNUM, block, n_block); 3326 } else { 3327 fp = 2; 3328 goto invalid_fld; 3329 } 3330 3331 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3332 /* Newer devices support queued TRIM commands */ 3333 tf->protocol = ATA_PROT_NCQ; 3334 tf->command = ATA_CMD_FPDMA_SEND; 3335 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3336 tf->nsect = qc->tag << 3; 3337 tf->hob_feature = (size / 512) >> 8; 3338 tf->feature = size / 512; 3339 3340 tf->auxiliary = 1; 3341 } else { 3342 tf->protocol = ATA_PROT_DMA; 3343 tf->hob_feature = 0; 3344 tf->feature = ATA_DSM_TRIM; 3345 tf->hob_nsect = (size / 512) >> 8; 3346 tf->nsect = size / 512; 3347 tf->command = ATA_CMD_DSM; 3348 } 3349 3350 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3351 ATA_TFLAG_WRITE; 3352 3353 ata_qc_set_pc_nbytes(qc); 3354 3355 return 0; 3356 3357 invalid_fld: 3358 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3359 return 1; 3360 invalid_param_len: 3361 /* "Parameter list length error" */ 3362 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3363 return 1; 3364 invalid_opcode: 3365 /* "Invalid command operation code" */ 3366 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3367 return 1; 3368 } 3369 3370 /** 3371 * ata_scsi_report_zones_complete - convert ATA output 3372 * @qc: command structure returning the data 3373 * 3374 * Convert T-13 little-endian field representation into 3375 * T-10 big-endian field representation. 3376 * What a mess. 3377 */ 3378 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3379 { 3380 struct scsi_cmnd *scmd = qc->scsicmd; 3381 struct sg_mapping_iter miter; 3382 unsigned long flags; 3383 unsigned int bytes = 0; 3384 3385 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3386 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3387 3388 local_irq_save(flags); 3389 while (sg_miter_next(&miter)) { 3390 unsigned int offset = 0; 3391 3392 if (bytes == 0) { 3393 char *hdr; 3394 u32 list_length; 3395 u64 max_lba, opt_lba; 3396 u16 same; 3397 3398 /* Swizzle header */ 3399 hdr = miter.addr; 3400 list_length = get_unaligned_le32(&hdr[0]); 3401 same = get_unaligned_le16(&hdr[4]); 3402 max_lba = get_unaligned_le64(&hdr[8]); 3403 opt_lba = get_unaligned_le64(&hdr[16]); 3404 put_unaligned_be32(list_length, &hdr[0]); 3405 hdr[4] = same & 0xf; 3406 put_unaligned_be64(max_lba, &hdr[8]); 3407 put_unaligned_be64(opt_lba, &hdr[16]); 3408 offset += 64; 3409 bytes += 64; 3410 } 3411 while (offset < miter.length) { 3412 char *rec; 3413 u8 cond, type, non_seq, reset; 3414 u64 size, start, wp; 3415 3416 /* Swizzle zone descriptor */ 3417 rec = miter.addr + offset; 3418 type = rec[0] & 0xf; 3419 cond = (rec[1] >> 4) & 0xf; 3420 non_seq = (rec[1] & 2); 3421 reset = (rec[1] & 1); 3422 size = get_unaligned_le64(&rec[8]); 3423 start = get_unaligned_le64(&rec[16]); 3424 wp = get_unaligned_le64(&rec[24]); 3425 rec[0] = type; 3426 rec[1] = (cond << 4) | non_seq | reset; 3427 put_unaligned_be64(size, &rec[8]); 3428 put_unaligned_be64(start, &rec[16]); 3429 put_unaligned_be64(wp, &rec[24]); 3430 WARN_ON(offset + 64 > miter.length); 3431 offset += 64; 3432 bytes += 64; 3433 } 3434 } 3435 sg_miter_stop(&miter); 3436 local_irq_restore(flags); 3437 3438 ata_scsi_qc_complete(qc); 3439 } 3440 3441 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3442 { 3443 struct ata_taskfile *tf = &qc->tf; 3444 struct scsi_cmnd *scmd = qc->scsicmd; 3445 const u8 *cdb = scmd->cmnd; 3446 u16 sect, fp = (u16)-1; 3447 u8 sa, options, bp = 0xff; 3448 u64 block; 3449 u32 n_block; 3450 3451 if (unlikely(scmd->cmd_len < 16)) { 3452 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3453 scmd->cmd_len); 3454 fp = 15; 3455 goto invalid_fld; 3456 } 3457 scsi_16_lba_len(cdb, &block, &n_block); 3458 if (n_block != scsi_bufflen(scmd)) { 3459 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3460 n_block, scsi_bufflen(scmd)); 3461 goto invalid_param_len; 3462 } 3463 sa = cdb[1] & 0x1f; 3464 if (sa != ZI_REPORT_ZONES) { 3465 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3466 fp = 1; 3467 goto invalid_fld; 3468 } 3469 /* 3470 * ZAC allows only for transfers in 512 byte blocks, 3471 * and uses a 16 bit value for the transfer count. 3472 */ 3473 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3474 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3475 goto invalid_param_len; 3476 } 3477 sect = n_block / 512; 3478 options = cdb[14] & 0xbf; 3479 3480 if (ata_ncq_enabled(qc->dev) && 3481 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3482 tf->protocol = ATA_PROT_NCQ; 3483 tf->command = ATA_CMD_FPDMA_RECV; 3484 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3485 tf->nsect = qc->tag << 3; 3486 tf->feature = sect & 0xff; 3487 tf->hob_feature = (sect >> 8) & 0xff; 3488 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3489 } else { 3490 tf->command = ATA_CMD_ZAC_MGMT_IN; 3491 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3492 tf->protocol = ATA_PROT_DMA; 3493 tf->hob_feature = options; 3494 tf->hob_nsect = (sect >> 8) & 0xff; 3495 tf->nsect = sect & 0xff; 3496 } 3497 tf->device = ATA_LBA; 3498 tf->lbah = (block >> 16) & 0xff; 3499 tf->lbam = (block >> 8) & 0xff; 3500 tf->lbal = block & 0xff; 3501 tf->hob_lbah = (block >> 40) & 0xff; 3502 tf->hob_lbam = (block >> 32) & 0xff; 3503 tf->hob_lbal = (block >> 24) & 0xff; 3504 3505 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3506 qc->flags |= ATA_QCFLAG_RESULT_TF; 3507 3508 ata_qc_set_pc_nbytes(qc); 3509 3510 qc->complete_fn = ata_scsi_report_zones_complete; 3511 3512 return 0; 3513 3514 invalid_fld: 3515 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3516 return 1; 3517 3518 invalid_param_len: 3519 /* "Parameter list length error" */ 3520 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3521 return 1; 3522 } 3523 3524 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3525 { 3526 struct ata_taskfile *tf = &qc->tf; 3527 struct scsi_cmnd *scmd = qc->scsicmd; 3528 struct ata_device *dev = qc->dev; 3529 const u8 *cdb = scmd->cmnd; 3530 u8 all, sa; 3531 u64 block; 3532 u32 n_block; 3533 u16 fp = (u16)-1; 3534 3535 if (unlikely(scmd->cmd_len < 16)) { 3536 fp = 15; 3537 goto invalid_fld; 3538 } 3539 3540 sa = cdb[1] & 0x1f; 3541 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3542 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3543 fp = 1; 3544 goto invalid_fld; 3545 } 3546 3547 scsi_16_lba_len(cdb, &block, &n_block); 3548 if (n_block) { 3549 /* 3550 * ZAC MANAGEMENT OUT doesn't define any length 3551 */ 3552 goto invalid_param_len; 3553 } 3554 if (block > dev->n_sectors) 3555 goto out_of_range; 3556 3557 all = cdb[14] & 0x1; 3558 3559 if (ata_ncq_enabled(qc->dev) && 3560 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3561 tf->protocol = ATA_PROT_NCQ_NODATA; 3562 tf->command = ATA_CMD_NCQ_NON_DATA; 3563 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3564 tf->nsect = qc->tag << 3; 3565 tf->auxiliary = sa | ((u16)all << 8); 3566 } else { 3567 tf->protocol = ATA_PROT_NODATA; 3568 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3569 tf->feature = sa; 3570 tf->hob_feature = all; 3571 } 3572 tf->lbah = (block >> 16) & 0xff; 3573 tf->lbam = (block >> 8) & 0xff; 3574 tf->lbal = block & 0xff; 3575 tf->hob_lbah = (block >> 40) & 0xff; 3576 tf->hob_lbam = (block >> 32) & 0xff; 3577 tf->hob_lbal = (block >> 24) & 0xff; 3578 tf->device = ATA_LBA; 3579 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3580 3581 return 0; 3582 3583 invalid_fld: 3584 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3585 return 1; 3586 out_of_range: 3587 /* "Logical Block Address out of range" */ 3588 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00); 3589 return 1; 3590 invalid_param_len: 3591 /* "Parameter list length error" */ 3592 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3593 return 1; 3594 } 3595 3596 /** 3597 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3598 * @qc: Storage for translated ATA taskfile 3599 * @buf: input buffer 3600 * @len: number of valid bytes in the input buffer 3601 * @fp: out parameter for the failed field on error 3602 * 3603 * Prepare a taskfile to modify caching information for the device. 3604 * 3605 * LOCKING: 3606 * None. 3607 */ 3608 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3609 const u8 *buf, int len, u16 *fp) 3610 { 3611 struct ata_taskfile *tf = &qc->tf; 3612 struct ata_device *dev = qc->dev; 3613 char mpage[CACHE_MPAGE_LEN]; 3614 u8 wce; 3615 int i; 3616 3617 /* 3618 * The first two bytes of def_cache_mpage are a header, so offsets 3619 * in mpage are off by 2 compared to buf. Same for len. 3620 */ 3621 3622 if (len != CACHE_MPAGE_LEN - 2) { 3623 if (len < CACHE_MPAGE_LEN - 2) 3624 *fp = len; 3625 else 3626 *fp = CACHE_MPAGE_LEN - 2; 3627 return -EINVAL; 3628 } 3629 3630 wce = buf[0] & (1 << 2); 3631 3632 /* 3633 * Check that read-only bits are not modified. 3634 */ 3635 ata_msense_caching(dev->id, mpage, false); 3636 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3637 if (i == 0) 3638 continue; 3639 if (mpage[i + 2] != buf[i]) { 3640 *fp = i; 3641 return -EINVAL; 3642 } 3643 } 3644 3645 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3646 tf->protocol = ATA_PROT_NODATA; 3647 tf->nsect = 0; 3648 tf->command = ATA_CMD_SET_FEATURES; 3649 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3650 return 0; 3651 } 3652 3653 /** 3654 * ata_mselect_control - Simulate MODE SELECT for control page 3655 * @qc: Storage for translated ATA taskfile 3656 * @buf: input buffer 3657 * @len: number of valid bytes in the input buffer 3658 * @fp: out parameter for the failed field on error 3659 * 3660 * Prepare a taskfile to modify caching information for the device. 3661 * 3662 * LOCKING: 3663 * None. 3664 */ 3665 static int ata_mselect_control(struct ata_queued_cmd *qc, 3666 const u8 *buf, int len, u16 *fp) 3667 { 3668 struct ata_device *dev = qc->dev; 3669 char mpage[CONTROL_MPAGE_LEN]; 3670 u8 d_sense; 3671 int i; 3672 3673 /* 3674 * The first two bytes of def_control_mpage are a header, so offsets 3675 * in mpage are off by 2 compared to buf. Same for len. 3676 */ 3677 3678 if (len != CONTROL_MPAGE_LEN - 2) { 3679 if (len < CONTROL_MPAGE_LEN - 2) 3680 *fp = len; 3681 else 3682 *fp = CONTROL_MPAGE_LEN - 2; 3683 return -EINVAL; 3684 } 3685 3686 d_sense = buf[0] & (1 << 2); 3687 3688 /* 3689 * Check that read-only bits are not modified. 3690 */ 3691 ata_msense_control(dev, mpage, false); 3692 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3693 if (i == 0) 3694 continue; 3695 if (mpage[2 + i] != buf[i]) { 3696 *fp = i; 3697 return -EINVAL; 3698 } 3699 } 3700 if (d_sense & (1 << 2)) 3701 dev->flags |= ATA_DFLAG_D_SENSE; 3702 else 3703 dev->flags &= ~ATA_DFLAG_D_SENSE; 3704 qc->scsicmd->result = SAM_STAT_GOOD; 3705 qc->scsicmd->scsi_done(qc->scsicmd); 3706 return 0; 3707 } 3708 3709 /** 3710 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands 3711 * @qc: Storage for translated ATA taskfile 3712 * 3713 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3714 * Assume this is invoked for direct access devices (e.g. disks) only. 3715 * There should be no block descriptor for other device types. 3716 * 3717 * LOCKING: 3718 * spin_lock_irqsave(host lock) 3719 */ 3720 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3721 { 3722 struct scsi_cmnd *scmd = qc->scsicmd; 3723 const u8 *cdb = scmd->cmnd; 3724 const u8 *p; 3725 u8 pg, spg; 3726 unsigned six_byte, pg_len, hdr_len, bd_len; 3727 int len; 3728 u16 fp = (u16)-1; 3729 u8 bp = 0xff; 3730 3731 VPRINTK("ENTER\n"); 3732 3733 six_byte = (cdb[0] == MODE_SELECT); 3734 if (six_byte) { 3735 if (scmd->cmd_len < 5) { 3736 fp = 4; 3737 goto invalid_fld; 3738 } 3739 3740 len = cdb[4]; 3741 hdr_len = 4; 3742 } else { 3743 if (scmd->cmd_len < 9) { 3744 fp = 8; 3745 goto invalid_fld; 3746 } 3747 3748 len = (cdb[7] << 8) + cdb[8]; 3749 hdr_len = 8; 3750 } 3751 3752 /* We only support PF=1, SP=0. */ 3753 if ((cdb[1] & 0x11) != 0x10) { 3754 fp = 1; 3755 bp = (cdb[1] & 0x01) ? 1 : 5; 3756 goto invalid_fld; 3757 } 3758 3759 /* Test early for possible overrun. */ 3760 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3761 goto invalid_param_len; 3762 3763 p = page_address(sg_page(scsi_sglist(scmd))); 3764 3765 /* Move past header and block descriptors. */ 3766 if (len < hdr_len) 3767 goto invalid_param_len; 3768 3769 if (six_byte) 3770 bd_len = p[3]; 3771 else 3772 bd_len = (p[6] << 8) + p[7]; 3773 3774 len -= hdr_len; 3775 p += hdr_len; 3776 if (len < bd_len) 3777 goto invalid_param_len; 3778 if (bd_len != 0 && bd_len != 8) { 3779 fp = (six_byte) ? 3 : 6; 3780 fp += bd_len + hdr_len; 3781 goto invalid_param; 3782 } 3783 3784 len -= bd_len; 3785 p += bd_len; 3786 if (len == 0) 3787 goto skip; 3788 3789 /* Parse both possible formats for the mode page headers. */ 3790 pg = p[0] & 0x3f; 3791 if (p[0] & 0x40) { 3792 if (len < 4) 3793 goto invalid_param_len; 3794 3795 spg = p[1]; 3796 pg_len = (p[2] << 8) | p[3]; 3797 p += 4; 3798 len -= 4; 3799 } else { 3800 if (len < 2) 3801 goto invalid_param_len; 3802 3803 spg = 0; 3804 pg_len = p[1]; 3805 p += 2; 3806 len -= 2; 3807 } 3808 3809 /* 3810 * No mode subpages supported (yet) but asking for _all_ 3811 * subpages may be valid 3812 */ 3813 if (spg && (spg != ALL_SUB_MPAGES)) { 3814 fp = (p[0] & 0x40) ? 1 : 0; 3815 fp += hdr_len + bd_len; 3816 goto invalid_param; 3817 } 3818 if (pg_len > len) 3819 goto invalid_param_len; 3820 3821 switch (pg) { 3822 case CACHE_MPAGE: 3823 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 3824 fp += hdr_len + bd_len; 3825 goto invalid_param; 3826 } 3827 break; 3828 case CONTROL_MPAGE: 3829 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 3830 fp += hdr_len + bd_len; 3831 goto invalid_param; 3832 } 3833 break; 3834 default: /* invalid page code */ 3835 fp = bd_len + hdr_len; 3836 goto invalid_param; 3837 } 3838 3839 /* 3840 * Only one page has changeable data, so we only support setting one 3841 * page at a time. 3842 */ 3843 if (len > pg_len) 3844 goto invalid_param; 3845 3846 return 0; 3847 3848 invalid_fld: 3849 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3850 return 1; 3851 3852 invalid_param: 3853 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 3854 return 1; 3855 3856 invalid_param_len: 3857 /* "Parameter list length error" */ 3858 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3859 return 1; 3860 3861 skip: 3862 scmd->result = SAM_STAT_GOOD; 3863 return 1; 3864 } 3865 3866 /** 3867 * ata_get_xlat_func - check if SCSI to ATA translation is possible 3868 * @dev: ATA device 3869 * @cmd: SCSI command opcode to consider 3870 * 3871 * Look up the SCSI command given, and determine whether the 3872 * SCSI command is to be translated or simulated. 3873 * 3874 * RETURNS: 3875 * Pointer to translation function if possible, %NULL if not. 3876 */ 3877 3878 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 3879 { 3880 switch (cmd) { 3881 case READ_6: 3882 case READ_10: 3883 case READ_16: 3884 3885 case WRITE_6: 3886 case WRITE_10: 3887 case WRITE_16: 3888 return ata_scsi_rw_xlat; 3889 3890 case WRITE_SAME_16: 3891 return ata_scsi_write_same_xlat; 3892 3893 case SYNCHRONIZE_CACHE: 3894 if (ata_try_flush_cache(dev)) 3895 return ata_scsi_flush_xlat; 3896 break; 3897 3898 case VERIFY: 3899 case VERIFY_16: 3900 return ata_scsi_verify_xlat; 3901 3902 case ATA_12: 3903 case ATA_16: 3904 return ata_scsi_pass_thru; 3905 3906 case MODE_SELECT: 3907 case MODE_SELECT_10: 3908 return ata_scsi_mode_select_xlat; 3909 break; 3910 3911 case ZBC_IN: 3912 return ata_scsi_zbc_in_xlat; 3913 3914 case ZBC_OUT: 3915 return ata_scsi_zbc_out_xlat; 3916 3917 case START_STOP: 3918 return ata_scsi_start_stop_xlat; 3919 } 3920 3921 return NULL; 3922 } 3923 3924 /** 3925 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 3926 * @ap: ATA port to which the command was being sent 3927 * @cmd: SCSI command to dump 3928 * 3929 * Prints the contents of a SCSI command via printk(). 3930 */ 3931 3932 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 3933 struct scsi_cmnd *cmd) 3934 { 3935 #ifdef ATA_DEBUG 3936 struct scsi_device *scsidev = cmd->device; 3937 3938 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n", 3939 ap->print_id, 3940 scsidev->channel, scsidev->id, scsidev->lun, 3941 cmd->cmnd); 3942 #endif 3943 } 3944 3945 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 3946 struct ata_device *dev) 3947 { 3948 u8 scsi_op = scmd->cmnd[0]; 3949 ata_xlat_func_t xlat_func; 3950 int rc = 0; 3951 3952 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 3953 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 3954 goto bad_cdb_len; 3955 3956 xlat_func = ata_get_xlat_func(dev, scsi_op); 3957 } else { 3958 if (unlikely(!scmd->cmd_len)) 3959 goto bad_cdb_len; 3960 3961 xlat_func = NULL; 3962 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 3963 /* relay SCSI command to ATAPI device */ 3964 int len = COMMAND_SIZE(scsi_op); 3965 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 3966 goto bad_cdb_len; 3967 3968 xlat_func = atapi_xlat; 3969 } else { 3970 /* ATA_16 passthru, treat as an ATA command */ 3971 if (unlikely(scmd->cmd_len > 16)) 3972 goto bad_cdb_len; 3973 3974 xlat_func = ata_get_xlat_func(dev, scsi_op); 3975 } 3976 } 3977 3978 if (xlat_func) 3979 rc = ata_scsi_translate(dev, scmd, xlat_func); 3980 else 3981 ata_scsi_simulate(dev, scmd); 3982 3983 return rc; 3984 3985 bad_cdb_len: 3986 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 3987 scmd->cmd_len, scsi_op, dev->cdb_len); 3988 scmd->result = DID_ERROR << 16; 3989 scmd->scsi_done(scmd); 3990 return 0; 3991 } 3992 3993 /** 3994 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 3995 * @shost: SCSI host of command to be sent 3996 * @cmd: SCSI command to be sent 3997 * 3998 * In some cases, this function translates SCSI commands into 3999 * ATA taskfiles, and queues the taskfiles to be sent to 4000 * hardware. In other cases, this function simulates a 4001 * SCSI device by evaluating and responding to certain 4002 * SCSI commands. This creates the overall effect of 4003 * ATA and ATAPI devices appearing as SCSI devices. 4004 * 4005 * LOCKING: 4006 * ATA host lock 4007 * 4008 * RETURNS: 4009 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4010 * 0 otherwise. 4011 */ 4012 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4013 { 4014 struct ata_port *ap; 4015 struct ata_device *dev; 4016 struct scsi_device *scsidev = cmd->device; 4017 int rc = 0; 4018 unsigned long irq_flags; 4019 4020 ap = ata_shost_to_port(shost); 4021 4022 spin_lock_irqsave(ap->lock, irq_flags); 4023 4024 ata_scsi_dump_cdb(ap, cmd); 4025 4026 dev = ata_scsi_find_dev(ap, scsidev); 4027 if (likely(dev)) 4028 rc = __ata_scsi_queuecmd(cmd, dev); 4029 else { 4030 cmd->result = (DID_BAD_TARGET << 16); 4031 cmd->scsi_done(cmd); 4032 } 4033 4034 spin_unlock_irqrestore(ap->lock, irq_flags); 4035 4036 return rc; 4037 } 4038 4039 /** 4040 * ata_scsi_simulate - simulate SCSI command on ATA device 4041 * @dev: the target device 4042 * @cmd: SCSI command being sent to device. 4043 * 4044 * Interprets and directly executes a select list of SCSI commands 4045 * that can be handled internally. 4046 * 4047 * LOCKING: 4048 * spin_lock_irqsave(host lock) 4049 */ 4050 4051 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4052 { 4053 struct ata_scsi_args args; 4054 const u8 *scsicmd = cmd->cmnd; 4055 u8 tmp8; 4056 4057 args.dev = dev; 4058 args.id = dev->id; 4059 args.cmd = cmd; 4060 args.done = cmd->scsi_done; 4061 4062 switch(scsicmd[0]) { 4063 case INQUIRY: 4064 if (scsicmd[1] & 2) /* is CmdDt set? */ 4065 ata_scsi_invalid_field(dev, cmd, 1); 4066 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4067 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4068 else switch (scsicmd[2]) { 4069 case 0x00: 4070 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4071 break; 4072 case 0x80: 4073 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4074 break; 4075 case 0x83: 4076 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4077 break; 4078 case 0x89: 4079 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4080 break; 4081 case 0xb0: 4082 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4083 break; 4084 case 0xb1: 4085 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4086 break; 4087 case 0xb2: 4088 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4089 break; 4090 case 0xb6: 4091 if (dev->flags & ATA_DFLAG_ZAC) { 4092 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4093 break; 4094 } 4095 /* Fallthrough */ 4096 default: 4097 ata_scsi_invalid_field(dev, cmd, 2); 4098 break; 4099 } 4100 break; 4101 4102 case MODE_SENSE: 4103 case MODE_SENSE_10: 4104 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4105 break; 4106 4107 case READ_CAPACITY: 4108 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4109 break; 4110 4111 case SERVICE_ACTION_IN_16: 4112 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4113 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4114 else 4115 ata_scsi_invalid_field(dev, cmd, 1); 4116 break; 4117 4118 case REPORT_LUNS: 4119 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4120 break; 4121 4122 case REQUEST_SENSE: 4123 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4124 cmd->result = (DRIVER_SENSE << 24); 4125 cmd->scsi_done(cmd); 4126 break; 4127 4128 /* if we reach this, then writeback caching is disabled, 4129 * turning this into a no-op. 4130 */ 4131 case SYNCHRONIZE_CACHE: 4132 /* fall through */ 4133 4134 /* no-op's, complete with success */ 4135 case REZERO_UNIT: 4136 case SEEK_6: 4137 case SEEK_10: 4138 case TEST_UNIT_READY: 4139 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 4140 break; 4141 4142 case SEND_DIAGNOSTIC: 4143 tmp8 = scsicmd[1] & ~(1 << 3); 4144 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) 4145 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 4146 else 4147 ata_scsi_invalid_field(dev, cmd, 1); 4148 break; 4149 4150 /* all other commands */ 4151 default: 4152 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4153 /* "Invalid command operation code" */ 4154 cmd->scsi_done(cmd); 4155 break; 4156 } 4157 } 4158 4159 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4160 { 4161 int i, rc; 4162 4163 for (i = 0; i < host->n_ports; i++) { 4164 struct ata_port *ap = host->ports[i]; 4165 struct Scsi_Host *shost; 4166 4167 rc = -ENOMEM; 4168 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4169 if (!shost) 4170 goto err_alloc; 4171 4172 shost->eh_noresume = 1; 4173 *(struct ata_port **)&shost->hostdata[0] = ap; 4174 ap->scsi_host = shost; 4175 4176 shost->transportt = ata_scsi_transport_template; 4177 shost->unique_id = ap->print_id; 4178 shost->max_id = 16; 4179 shost->max_lun = 1; 4180 shost->max_channel = 1; 4181 shost->max_cmd_len = 16; 4182 shost->no_write_same = 1; 4183 4184 /* Schedule policy is determined by ->qc_defer() 4185 * callback and it needs to see every deferred qc. 4186 * Set host_blocked to 1 to prevent SCSI midlayer from 4187 * automatically deferring requests. 4188 */ 4189 shost->max_host_blocked = 1; 4190 4191 rc = scsi_add_host_with_dma(ap->scsi_host, 4192 &ap->tdev, ap->host->dev); 4193 if (rc) 4194 goto err_add; 4195 } 4196 4197 return 0; 4198 4199 err_add: 4200 scsi_host_put(host->ports[i]->scsi_host); 4201 err_alloc: 4202 while (--i >= 0) { 4203 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4204 4205 scsi_remove_host(shost); 4206 scsi_host_put(shost); 4207 } 4208 return rc; 4209 } 4210 4211 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4212 { 4213 int tries = 5; 4214 struct ata_device *last_failed_dev = NULL; 4215 struct ata_link *link; 4216 struct ata_device *dev; 4217 4218 repeat: 4219 ata_for_each_link(link, ap, EDGE) { 4220 ata_for_each_dev(dev, link, ENABLED) { 4221 struct scsi_device *sdev; 4222 int channel = 0, id = 0; 4223 4224 if (dev->sdev) 4225 continue; 4226 4227 if (ata_is_host_link(link)) 4228 id = dev->devno; 4229 else 4230 channel = link->pmp; 4231 4232 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4233 NULL); 4234 if (!IS_ERR(sdev)) { 4235 dev->sdev = sdev; 4236 scsi_device_put(sdev); 4237 } else { 4238 dev->sdev = NULL; 4239 } 4240 } 4241 } 4242 4243 /* If we scanned while EH was in progress or allocation 4244 * failure occurred, scan would have failed silently. Check 4245 * whether all devices are attached. 4246 */ 4247 ata_for_each_link(link, ap, EDGE) { 4248 ata_for_each_dev(dev, link, ENABLED) { 4249 if (!dev->sdev) 4250 goto exit_loop; 4251 } 4252 } 4253 exit_loop: 4254 if (!link) 4255 return; 4256 4257 /* we're missing some SCSI devices */ 4258 if (sync) { 4259 /* If caller requested synchrnous scan && we've made 4260 * any progress, sleep briefly and repeat. 4261 */ 4262 if (dev != last_failed_dev) { 4263 msleep(100); 4264 last_failed_dev = dev; 4265 goto repeat; 4266 } 4267 4268 /* We might be failing to detect boot device, give it 4269 * a few more chances. 4270 */ 4271 if (--tries) { 4272 msleep(100); 4273 goto repeat; 4274 } 4275 4276 ata_port_err(ap, 4277 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4278 } 4279 4280 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4281 round_jiffies_relative(HZ)); 4282 } 4283 4284 /** 4285 * ata_scsi_offline_dev - offline attached SCSI device 4286 * @dev: ATA device to offline attached SCSI device for 4287 * 4288 * This function is called from ata_eh_hotplug() and responsible 4289 * for taking the SCSI device attached to @dev offline. This 4290 * function is called with host lock which protects dev->sdev 4291 * against clearing. 4292 * 4293 * LOCKING: 4294 * spin_lock_irqsave(host lock) 4295 * 4296 * RETURNS: 4297 * 1 if attached SCSI device exists, 0 otherwise. 4298 */ 4299 int ata_scsi_offline_dev(struct ata_device *dev) 4300 { 4301 if (dev->sdev) { 4302 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4303 return 1; 4304 } 4305 return 0; 4306 } 4307 4308 /** 4309 * ata_scsi_remove_dev - remove attached SCSI device 4310 * @dev: ATA device to remove attached SCSI device for 4311 * 4312 * This function is called from ata_eh_scsi_hotplug() and 4313 * responsible for removing the SCSI device attached to @dev. 4314 * 4315 * LOCKING: 4316 * Kernel thread context (may sleep). 4317 */ 4318 static void ata_scsi_remove_dev(struct ata_device *dev) 4319 { 4320 struct ata_port *ap = dev->link->ap; 4321 struct scsi_device *sdev; 4322 unsigned long flags; 4323 4324 /* Alas, we need to grab scan_mutex to ensure SCSI device 4325 * state doesn't change underneath us and thus 4326 * scsi_device_get() always succeeds. The mutex locking can 4327 * be removed if there is __scsi_device_get() interface which 4328 * increments reference counts regardless of device state. 4329 */ 4330 mutex_lock(&ap->scsi_host->scan_mutex); 4331 spin_lock_irqsave(ap->lock, flags); 4332 4333 /* clearing dev->sdev is protected by host lock */ 4334 sdev = dev->sdev; 4335 dev->sdev = NULL; 4336 4337 if (sdev) { 4338 /* If user initiated unplug races with us, sdev can go 4339 * away underneath us after the host lock and 4340 * scan_mutex are released. Hold onto it. 4341 */ 4342 if (scsi_device_get(sdev) == 0) { 4343 /* The following ensures the attached sdev is 4344 * offline on return from ata_scsi_offline_dev() 4345 * regardless it wins or loses the race 4346 * against this function. 4347 */ 4348 scsi_device_set_state(sdev, SDEV_OFFLINE); 4349 } else { 4350 WARN_ON(1); 4351 sdev = NULL; 4352 } 4353 } 4354 4355 spin_unlock_irqrestore(ap->lock, flags); 4356 mutex_unlock(&ap->scsi_host->scan_mutex); 4357 4358 if (sdev) { 4359 ata_dev_info(dev, "detaching (SCSI %s)\n", 4360 dev_name(&sdev->sdev_gendev)); 4361 4362 scsi_remove_device(sdev); 4363 scsi_device_put(sdev); 4364 } 4365 } 4366 4367 static void ata_scsi_handle_link_detach(struct ata_link *link) 4368 { 4369 struct ata_port *ap = link->ap; 4370 struct ata_device *dev; 4371 4372 ata_for_each_dev(dev, link, ALL) { 4373 unsigned long flags; 4374 4375 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4376 continue; 4377 4378 spin_lock_irqsave(ap->lock, flags); 4379 dev->flags &= ~ATA_DFLAG_DETACHED; 4380 spin_unlock_irqrestore(ap->lock, flags); 4381 4382 if (zpodd_dev_enabled(dev)) 4383 zpodd_exit(dev); 4384 4385 ata_scsi_remove_dev(dev); 4386 } 4387 } 4388 4389 /** 4390 * ata_scsi_media_change_notify - send media change event 4391 * @dev: Pointer to the disk device with media change event 4392 * 4393 * Tell the block layer to send a media change notification 4394 * event. 4395 * 4396 * LOCKING: 4397 * spin_lock_irqsave(host lock) 4398 */ 4399 void ata_scsi_media_change_notify(struct ata_device *dev) 4400 { 4401 if (dev->sdev) 4402 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4403 GFP_ATOMIC); 4404 } 4405 4406 /** 4407 * ata_scsi_hotplug - SCSI part of hotplug 4408 * @work: Pointer to ATA port to perform SCSI hotplug on 4409 * 4410 * Perform SCSI part of hotplug. It's executed from a separate 4411 * workqueue after EH completes. This is necessary because SCSI 4412 * hot plugging requires working EH and hot unplugging is 4413 * synchronized with hot plugging with a mutex. 4414 * 4415 * LOCKING: 4416 * Kernel thread context (may sleep). 4417 */ 4418 void ata_scsi_hotplug(struct work_struct *work) 4419 { 4420 struct ata_port *ap = 4421 container_of(work, struct ata_port, hotplug_task.work); 4422 int i; 4423 4424 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4425 DPRINTK("ENTER/EXIT - unloading\n"); 4426 return; 4427 } 4428 4429 /* 4430 * XXX - UGLY HACK 4431 * 4432 * The block layer suspend/resume path is fundamentally broken due 4433 * to freezable kthreads and workqueue and may deadlock if a block 4434 * device gets removed while resume is in progress. I don't know 4435 * what the solution is short of removing freezable kthreads and 4436 * workqueues altogether. 4437 * 4438 * The following is an ugly hack to avoid kicking off device 4439 * removal while freezer is active. This is a joke but does avoid 4440 * this particular deadlock scenario. 4441 * 4442 * https://bugzilla.kernel.org/show_bug.cgi?id=62801 4443 * http://marc.info/?l=linux-kernel&m=138695698516487 4444 */ 4445 #ifdef CONFIG_FREEZER 4446 while (pm_freezing) 4447 msleep(10); 4448 #endif 4449 4450 DPRINTK("ENTER\n"); 4451 mutex_lock(&ap->scsi_scan_mutex); 4452 4453 /* Unplug detached devices. We cannot use link iterator here 4454 * because PMP links have to be scanned even if PMP is 4455 * currently not attached. Iterate manually. 4456 */ 4457 ata_scsi_handle_link_detach(&ap->link); 4458 if (ap->pmp_link) 4459 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4460 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4461 4462 /* scan for new ones */ 4463 ata_scsi_scan_host(ap, 0); 4464 4465 mutex_unlock(&ap->scsi_scan_mutex); 4466 DPRINTK("EXIT\n"); 4467 } 4468 4469 /** 4470 * ata_scsi_user_scan - indication for user-initiated bus scan 4471 * @shost: SCSI host to scan 4472 * @channel: Channel to scan 4473 * @id: ID to scan 4474 * @lun: LUN to scan 4475 * 4476 * This function is called when user explicitly requests bus 4477 * scan. Set probe pending flag and invoke EH. 4478 * 4479 * LOCKING: 4480 * SCSI layer (we don't care) 4481 * 4482 * RETURNS: 4483 * Zero. 4484 */ 4485 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4486 unsigned int id, u64 lun) 4487 { 4488 struct ata_port *ap = ata_shost_to_port(shost); 4489 unsigned long flags; 4490 int devno, rc = 0; 4491 4492 if (!ap->ops->error_handler) 4493 return -EOPNOTSUPP; 4494 4495 if (lun != SCAN_WILD_CARD && lun) 4496 return -EINVAL; 4497 4498 if (!sata_pmp_attached(ap)) { 4499 if (channel != SCAN_WILD_CARD && channel) 4500 return -EINVAL; 4501 devno = id; 4502 } else { 4503 if (id != SCAN_WILD_CARD && id) 4504 return -EINVAL; 4505 devno = channel; 4506 } 4507 4508 spin_lock_irqsave(ap->lock, flags); 4509 4510 if (devno == SCAN_WILD_CARD) { 4511 struct ata_link *link; 4512 4513 ata_for_each_link(link, ap, EDGE) { 4514 struct ata_eh_info *ehi = &link->eh_info; 4515 ehi->probe_mask |= ATA_ALL_DEVICES; 4516 ehi->action |= ATA_EH_RESET; 4517 } 4518 } else { 4519 struct ata_device *dev = ata_find_dev(ap, devno); 4520 4521 if (dev) { 4522 struct ata_eh_info *ehi = &dev->link->eh_info; 4523 ehi->probe_mask |= 1 << dev->devno; 4524 ehi->action |= ATA_EH_RESET; 4525 } else 4526 rc = -EINVAL; 4527 } 4528 4529 if (rc == 0) { 4530 ata_port_schedule_eh(ap); 4531 spin_unlock_irqrestore(ap->lock, flags); 4532 ata_port_wait_eh(ap); 4533 } else 4534 spin_unlock_irqrestore(ap->lock, flags); 4535 4536 return rc; 4537 } 4538 4539 /** 4540 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4541 * @work: Pointer to ATA port to perform scsi_rescan_device() 4542 * 4543 * After ATA pass thru (SAT) commands are executed successfully, 4544 * libata need to propagate the changes to SCSI layer. 4545 * 4546 * LOCKING: 4547 * Kernel thread context (may sleep). 4548 */ 4549 void ata_scsi_dev_rescan(struct work_struct *work) 4550 { 4551 struct ata_port *ap = 4552 container_of(work, struct ata_port, scsi_rescan_task); 4553 struct ata_link *link; 4554 struct ata_device *dev; 4555 unsigned long flags; 4556 4557 mutex_lock(&ap->scsi_scan_mutex); 4558 spin_lock_irqsave(ap->lock, flags); 4559 4560 ata_for_each_link(link, ap, EDGE) { 4561 ata_for_each_dev(dev, link, ENABLED) { 4562 struct scsi_device *sdev = dev->sdev; 4563 4564 if (!sdev) 4565 continue; 4566 if (scsi_device_get(sdev)) 4567 continue; 4568 4569 spin_unlock_irqrestore(ap->lock, flags); 4570 scsi_rescan_device(&(sdev->sdev_gendev)); 4571 scsi_device_put(sdev); 4572 spin_lock_irqsave(ap->lock, flags); 4573 } 4574 } 4575 4576 spin_unlock_irqrestore(ap->lock, flags); 4577 mutex_unlock(&ap->scsi_scan_mutex); 4578 } 4579 4580 /** 4581 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 4582 * @host: ATA host container for all SAS ports 4583 * @port_info: Information from low-level host driver 4584 * @shost: SCSI host that the scsi device is attached to 4585 * 4586 * LOCKING: 4587 * PCI/etc. bus probe sem. 4588 * 4589 * RETURNS: 4590 * ata_port pointer on success / NULL on failure. 4591 */ 4592 4593 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 4594 struct ata_port_info *port_info, 4595 struct Scsi_Host *shost) 4596 { 4597 struct ata_port *ap; 4598 4599 ap = ata_port_alloc(host); 4600 if (!ap) 4601 return NULL; 4602 4603 ap->port_no = 0; 4604 ap->lock = &host->lock; 4605 ap->pio_mask = port_info->pio_mask; 4606 ap->mwdma_mask = port_info->mwdma_mask; 4607 ap->udma_mask = port_info->udma_mask; 4608 ap->flags |= port_info->flags; 4609 ap->ops = port_info->port_ops; 4610 ap->cbl = ATA_CBL_SATA; 4611 4612 return ap; 4613 } 4614 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 4615 4616 /** 4617 * ata_sas_port_start - Set port up for dma. 4618 * @ap: Port to initialize 4619 * 4620 * Called just after data structures for each port are 4621 * initialized. 4622 * 4623 * May be used as the port_start() entry in ata_port_operations. 4624 * 4625 * LOCKING: 4626 * Inherited from caller. 4627 */ 4628 int ata_sas_port_start(struct ata_port *ap) 4629 { 4630 /* 4631 * the port is marked as frozen at allocation time, but if we don't 4632 * have new eh, we won't thaw it 4633 */ 4634 if (!ap->ops->error_handler) 4635 ap->pflags &= ~ATA_PFLAG_FROZEN; 4636 return 0; 4637 } 4638 EXPORT_SYMBOL_GPL(ata_sas_port_start); 4639 4640 /** 4641 * ata_port_stop - Undo ata_sas_port_start() 4642 * @ap: Port to shut down 4643 * 4644 * May be used as the port_stop() entry in ata_port_operations. 4645 * 4646 * LOCKING: 4647 * Inherited from caller. 4648 */ 4649 4650 void ata_sas_port_stop(struct ata_port *ap) 4651 { 4652 } 4653 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 4654 4655 /** 4656 * ata_sas_async_probe - simply schedule probing and return 4657 * @ap: Port to probe 4658 * 4659 * For batch scheduling of probe for sas attached ata devices, assumes 4660 * the port has already been through ata_sas_port_init() 4661 */ 4662 void ata_sas_async_probe(struct ata_port *ap) 4663 { 4664 __ata_port_probe(ap); 4665 } 4666 EXPORT_SYMBOL_GPL(ata_sas_async_probe); 4667 4668 int ata_sas_sync_probe(struct ata_port *ap) 4669 { 4670 return ata_port_probe(ap); 4671 } 4672 EXPORT_SYMBOL_GPL(ata_sas_sync_probe); 4673 4674 4675 /** 4676 * ata_sas_port_init - Initialize a SATA device 4677 * @ap: SATA port to initialize 4678 * 4679 * LOCKING: 4680 * PCI/etc. bus probe sem. 4681 * 4682 * RETURNS: 4683 * Zero on success, non-zero on error. 4684 */ 4685 4686 int ata_sas_port_init(struct ata_port *ap) 4687 { 4688 int rc = ap->ops->port_start(ap); 4689 4690 if (rc) 4691 return rc; 4692 ap->print_id = atomic_inc_return(&ata_print_id); 4693 return 0; 4694 } 4695 EXPORT_SYMBOL_GPL(ata_sas_port_init); 4696 4697 /** 4698 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 4699 * @ap: SATA port to destroy 4700 * 4701 */ 4702 4703 void ata_sas_port_destroy(struct ata_port *ap) 4704 { 4705 if (ap->ops->port_stop) 4706 ap->ops->port_stop(ap); 4707 kfree(ap); 4708 } 4709 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 4710 4711 /** 4712 * ata_sas_slave_configure - Default slave_config routine for libata devices 4713 * @sdev: SCSI device to configure 4714 * @ap: ATA port to which SCSI device is attached 4715 * 4716 * RETURNS: 4717 * Zero. 4718 */ 4719 4720 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 4721 { 4722 ata_scsi_sdev_config(sdev); 4723 ata_scsi_dev_config(sdev, ap->link.device); 4724 return 0; 4725 } 4726 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 4727 4728 /** 4729 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 4730 * @cmd: SCSI command to be sent 4731 * @ap: ATA port to which the command is being sent 4732 * 4733 * RETURNS: 4734 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4735 * 0 otherwise. 4736 */ 4737 4738 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 4739 { 4740 int rc = 0; 4741 4742 ata_scsi_dump_cdb(ap, cmd); 4743 4744 if (likely(ata_dev_enabled(ap->link.device))) 4745 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 4746 else { 4747 cmd->result = (DID_BAD_TARGET << 16); 4748 cmd->scsi_done(cmd); 4749 } 4750 return rc; 4751 } 4752 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 4753 4754 int ata_sas_allocate_tag(struct ata_port *ap) 4755 { 4756 unsigned int max_queue = ap->host->n_tags; 4757 unsigned int i, tag; 4758 4759 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) { 4760 tag = tag < max_queue ? tag : 0; 4761 4762 /* the last tag is reserved for internal command. */ 4763 if (tag == ATA_TAG_INTERNAL) 4764 continue; 4765 4766 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) { 4767 ap->sas_last_tag = tag; 4768 return tag; 4769 } 4770 } 4771 return -1; 4772 } 4773 4774 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) 4775 { 4776 clear_bit(tag, &ap->sas_tag_allocated); 4777 } 4778