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 1163 /* Schedule policy is determined by ->qc_defer() callback and 1164 * it needs to see every deferred qc. Set dev_blocked to 1 to 1165 * prevent SCSI midlayer from automatically deferring 1166 * requests. 1167 */ 1168 sdev->max_device_blocked = 1; 1169 } 1170 1171 /** 1172 * atapi_drain_needed - Check whether data transfer may overflow 1173 * @rq: request to be checked 1174 * 1175 * ATAPI commands which transfer variable length data to host 1176 * might overflow due to application error or hardware bug. This 1177 * function checks whether overflow should be drained and ignored 1178 * for @request. 1179 * 1180 * LOCKING: 1181 * None. 1182 * 1183 * RETURNS: 1184 * 1 if ; otherwise, 0. 1185 */ 1186 static int atapi_drain_needed(struct request *rq) 1187 { 1188 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC)) 1189 return 0; 1190 1191 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq))) 1192 return 0; 1193 1194 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; 1195 } 1196 1197 static int ata_scsi_dev_config(struct scsi_device *sdev, 1198 struct ata_device *dev) 1199 { 1200 struct request_queue *q = sdev->request_queue; 1201 1202 if (!ata_id_has_unload(dev->id)) 1203 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1204 1205 /* configure max sectors */ 1206 blk_queue_max_hw_sectors(q, dev->max_sectors); 1207 1208 if (dev->class == ATA_DEV_ATAPI) { 1209 void *buf; 1210 1211 sdev->sector_size = ATA_SECT_SIZE; 1212 1213 /* set DMA padding */ 1214 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1215 1216 /* configure draining */ 1217 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1218 if (!buf) { 1219 ata_dev_err(dev, "drain buffer allocation failed\n"); 1220 return -ENOMEM; 1221 } 1222 1223 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1224 } else { 1225 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1226 sdev->manage_start_stop = 1; 1227 } 1228 1229 /* 1230 * ata_pio_sectors() expects buffer for each sector to not cross 1231 * page boundary. Enforce it by requiring buffers to be sector 1232 * aligned, which works iff sector_size is not larger than 1233 * PAGE_SIZE. ATAPI devices also need the alignment as 1234 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1235 */ 1236 if (sdev->sector_size > PAGE_SIZE) 1237 ata_dev_warn(dev, 1238 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1239 sdev->sector_size); 1240 1241 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1242 1243 if (dev->flags & ATA_DFLAG_AN) 1244 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1245 1246 if (dev->flags & ATA_DFLAG_NCQ) { 1247 int depth; 1248 1249 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1250 depth = min(ATA_MAX_QUEUE - 1, depth); 1251 scsi_change_queue_depth(sdev, depth); 1252 } 1253 1254 blk_queue_flush_queueable(q, false); 1255 1256 dev->sdev = sdev; 1257 return 0; 1258 } 1259 1260 /** 1261 * ata_scsi_slave_config - Set SCSI device attributes 1262 * @sdev: SCSI device to examine 1263 * 1264 * This is called before we actually start reading 1265 * and writing to the device, to configure certain 1266 * SCSI mid-layer behaviors. 1267 * 1268 * LOCKING: 1269 * Defined by SCSI layer. We don't really care. 1270 */ 1271 1272 int ata_scsi_slave_config(struct scsi_device *sdev) 1273 { 1274 struct ata_port *ap = ata_shost_to_port(sdev->host); 1275 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1276 int rc = 0; 1277 1278 ata_scsi_sdev_config(sdev); 1279 1280 if (dev) 1281 rc = ata_scsi_dev_config(sdev, dev); 1282 1283 return rc; 1284 } 1285 1286 /** 1287 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1288 * @sdev: SCSI device to be destroyed 1289 * 1290 * @sdev is about to be destroyed for hot/warm unplugging. If 1291 * this unplugging was initiated by libata as indicated by NULL 1292 * dev->sdev, this function doesn't have to do anything. 1293 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1294 * Clear dev->sdev, schedule the device for ATA detach and invoke 1295 * EH. 1296 * 1297 * LOCKING: 1298 * Defined by SCSI layer. We don't really care. 1299 */ 1300 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1301 { 1302 struct ata_port *ap = ata_shost_to_port(sdev->host); 1303 struct request_queue *q = sdev->request_queue; 1304 unsigned long flags; 1305 struct ata_device *dev; 1306 1307 if (!ap->ops->error_handler) 1308 return; 1309 1310 spin_lock_irqsave(ap->lock, flags); 1311 dev = __ata_scsi_find_dev(ap, sdev); 1312 if (dev && dev->sdev) { 1313 /* SCSI device already in CANCEL state, no need to offline it */ 1314 dev->sdev = NULL; 1315 dev->flags |= ATA_DFLAG_DETACH; 1316 ata_port_schedule_eh(ap); 1317 } 1318 spin_unlock_irqrestore(ap->lock, flags); 1319 1320 kfree(q->dma_drain_buffer); 1321 q->dma_drain_buffer = NULL; 1322 q->dma_drain_size = 0; 1323 } 1324 1325 /** 1326 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth 1327 * @ap: ATA port to which the device change the queue depth 1328 * @sdev: SCSI device to configure queue depth for 1329 * @queue_depth: new queue depth 1330 * 1331 * libsas and libata have different approaches for associating a sdev to 1332 * its ata_port. 1333 * 1334 */ 1335 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1336 int queue_depth) 1337 { 1338 struct ata_device *dev; 1339 unsigned long flags; 1340 1341 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1342 return sdev->queue_depth; 1343 1344 dev = ata_scsi_find_dev(ap, sdev); 1345 if (!dev || !ata_dev_enabled(dev)) 1346 return sdev->queue_depth; 1347 1348 /* NCQ enabled? */ 1349 spin_lock_irqsave(ap->lock, flags); 1350 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1351 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1352 dev->flags |= ATA_DFLAG_NCQ_OFF; 1353 queue_depth = 1; 1354 } 1355 spin_unlock_irqrestore(ap->lock, flags); 1356 1357 /* limit and apply queue depth */ 1358 queue_depth = min(queue_depth, sdev->host->can_queue); 1359 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1360 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); 1361 1362 if (sdev->queue_depth == queue_depth) 1363 return -EINVAL; 1364 1365 return scsi_change_queue_depth(sdev, queue_depth); 1366 } 1367 1368 /** 1369 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1370 * @sdev: SCSI device to configure queue depth for 1371 * @queue_depth: new queue depth 1372 * 1373 * This is libata standard hostt->change_queue_depth callback. 1374 * SCSI will call into this callback when user tries to set queue 1375 * depth via sysfs. 1376 * 1377 * LOCKING: 1378 * SCSI layer (we don't care) 1379 * 1380 * RETURNS: 1381 * Newly configured queue depth. 1382 */ 1383 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) 1384 { 1385 struct ata_port *ap = ata_shost_to_port(sdev->host); 1386 1387 return __ata_change_queue_depth(ap, sdev, queue_depth); 1388 } 1389 1390 /** 1391 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1392 * @qc: Storage for translated ATA taskfile 1393 * 1394 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1395 * (to start). Perhaps these commands should be preceded by 1396 * CHECK POWER MODE to see what power mode the device is already in. 1397 * [See SAT revision 5 at www.t10.org] 1398 * 1399 * LOCKING: 1400 * spin_lock_irqsave(host lock) 1401 * 1402 * RETURNS: 1403 * Zero on success, non-zero on error. 1404 */ 1405 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1406 { 1407 struct scsi_cmnd *scmd = qc->scsicmd; 1408 struct ata_taskfile *tf = &qc->tf; 1409 const u8 *cdb = scmd->cmnd; 1410 u16 fp; 1411 u8 bp = 0xff; 1412 1413 if (scmd->cmd_len < 5) { 1414 fp = 4; 1415 goto invalid_fld; 1416 } 1417 1418 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1419 tf->protocol = ATA_PROT_NODATA; 1420 if (cdb[1] & 0x1) { 1421 ; /* ignore IMMED bit, violates sat-r05 */ 1422 } 1423 if (cdb[4] & 0x2) { 1424 fp = 4; 1425 bp = 1; 1426 goto invalid_fld; /* LOEJ bit set not supported */ 1427 } 1428 if (((cdb[4] >> 4) & 0xf) != 0) { 1429 fp = 4; 1430 bp = 3; 1431 goto invalid_fld; /* power conditions not supported */ 1432 } 1433 1434 if (cdb[4] & 0x1) { 1435 tf->nsect = 1; /* 1 sector, lba=0 */ 1436 1437 if (qc->dev->flags & ATA_DFLAG_LBA) { 1438 tf->flags |= ATA_TFLAG_LBA; 1439 1440 tf->lbah = 0x0; 1441 tf->lbam = 0x0; 1442 tf->lbal = 0x0; 1443 tf->device |= ATA_LBA; 1444 } else { 1445 /* CHS */ 1446 tf->lbal = 0x1; /* sect */ 1447 tf->lbam = 0x0; /* cyl low */ 1448 tf->lbah = 0x0; /* cyl high */ 1449 } 1450 1451 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1452 } else { 1453 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1454 * or S5) causing some drives to spin up and down again. 1455 */ 1456 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1457 system_state == SYSTEM_POWER_OFF) 1458 goto skip; 1459 1460 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1461 system_entering_hibernation()) 1462 goto skip; 1463 1464 /* Issue ATA STANDBY IMMEDIATE command */ 1465 tf->command = ATA_CMD_STANDBYNOW1; 1466 } 1467 1468 /* 1469 * Standby and Idle condition timers could be implemented but that 1470 * would require libata to implement the Power condition mode page 1471 * and allow the user to change it. Changing mode pages requires 1472 * MODE SELECT to be implemented. 1473 */ 1474 1475 return 0; 1476 1477 invalid_fld: 1478 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1479 return 1; 1480 skip: 1481 scmd->result = SAM_STAT_GOOD; 1482 return 1; 1483 } 1484 1485 1486 /** 1487 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1488 * @qc: Storage for translated ATA taskfile 1489 * 1490 * Sets up an ATA taskfile to issue FLUSH CACHE or 1491 * FLUSH CACHE EXT. 1492 * 1493 * LOCKING: 1494 * spin_lock_irqsave(host lock) 1495 * 1496 * RETURNS: 1497 * Zero on success, non-zero on error. 1498 */ 1499 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1500 { 1501 struct ata_taskfile *tf = &qc->tf; 1502 1503 tf->flags |= ATA_TFLAG_DEVICE; 1504 tf->protocol = ATA_PROT_NODATA; 1505 1506 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1507 tf->command = ATA_CMD_FLUSH_EXT; 1508 else 1509 tf->command = ATA_CMD_FLUSH; 1510 1511 /* flush is critical for IO integrity, consider it an IO command */ 1512 qc->flags |= ATA_QCFLAG_IO; 1513 1514 return 0; 1515 } 1516 1517 /** 1518 * scsi_6_lba_len - Get LBA and transfer length 1519 * @cdb: SCSI command to translate 1520 * 1521 * Calculate LBA and transfer length for 6-byte commands. 1522 * 1523 * RETURNS: 1524 * @plba: the LBA 1525 * @plen: the transfer length 1526 */ 1527 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1528 { 1529 u64 lba = 0; 1530 u32 len; 1531 1532 VPRINTK("six-byte command\n"); 1533 1534 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1535 lba |= ((u64)cdb[2]) << 8; 1536 lba |= ((u64)cdb[3]); 1537 1538 len = cdb[4]; 1539 1540 *plba = lba; 1541 *plen = len; 1542 } 1543 1544 /** 1545 * scsi_10_lba_len - Get LBA and transfer length 1546 * @cdb: SCSI command to translate 1547 * 1548 * Calculate LBA and transfer length for 10-byte commands. 1549 * 1550 * RETURNS: 1551 * @plba: the LBA 1552 * @plen: the transfer length 1553 */ 1554 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1555 { 1556 u64 lba = 0; 1557 u32 len = 0; 1558 1559 VPRINTK("ten-byte command\n"); 1560 1561 lba |= ((u64)cdb[2]) << 24; 1562 lba |= ((u64)cdb[3]) << 16; 1563 lba |= ((u64)cdb[4]) << 8; 1564 lba |= ((u64)cdb[5]); 1565 1566 len |= ((u32)cdb[7]) << 8; 1567 len |= ((u32)cdb[8]); 1568 1569 *plba = lba; 1570 *plen = len; 1571 } 1572 1573 /** 1574 * scsi_16_lba_len - Get LBA and transfer length 1575 * @cdb: SCSI command to translate 1576 * 1577 * Calculate LBA and transfer length for 16-byte commands. 1578 * 1579 * RETURNS: 1580 * @plba: the LBA 1581 * @plen: the transfer length 1582 */ 1583 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1584 { 1585 u64 lba = 0; 1586 u32 len = 0; 1587 1588 VPRINTK("sixteen-byte command\n"); 1589 1590 lba |= ((u64)cdb[2]) << 56; 1591 lba |= ((u64)cdb[3]) << 48; 1592 lba |= ((u64)cdb[4]) << 40; 1593 lba |= ((u64)cdb[5]) << 32; 1594 lba |= ((u64)cdb[6]) << 24; 1595 lba |= ((u64)cdb[7]) << 16; 1596 lba |= ((u64)cdb[8]) << 8; 1597 lba |= ((u64)cdb[9]); 1598 1599 len |= ((u32)cdb[10]) << 24; 1600 len |= ((u32)cdb[11]) << 16; 1601 len |= ((u32)cdb[12]) << 8; 1602 len |= ((u32)cdb[13]); 1603 1604 *plba = lba; 1605 *plen = len; 1606 } 1607 1608 /** 1609 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1610 * @qc: Storage for translated ATA taskfile 1611 * 1612 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1613 * 1614 * LOCKING: 1615 * spin_lock_irqsave(host lock) 1616 * 1617 * RETURNS: 1618 * Zero on success, non-zero on error. 1619 */ 1620 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1621 { 1622 struct scsi_cmnd *scmd = qc->scsicmd; 1623 struct ata_taskfile *tf = &qc->tf; 1624 struct ata_device *dev = qc->dev; 1625 u64 dev_sectors = qc->dev->n_sectors; 1626 const u8 *cdb = scmd->cmnd; 1627 u64 block; 1628 u32 n_block; 1629 u16 fp; 1630 1631 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1632 tf->protocol = ATA_PROT_NODATA; 1633 1634 if (cdb[0] == VERIFY) { 1635 if (scmd->cmd_len < 10) { 1636 fp = 9; 1637 goto invalid_fld; 1638 } 1639 scsi_10_lba_len(cdb, &block, &n_block); 1640 } else if (cdb[0] == VERIFY_16) { 1641 if (scmd->cmd_len < 16) { 1642 fp = 15; 1643 goto invalid_fld; 1644 } 1645 scsi_16_lba_len(cdb, &block, &n_block); 1646 } else { 1647 fp = 0; 1648 goto invalid_fld; 1649 } 1650 1651 if (!n_block) 1652 goto nothing_to_do; 1653 if (block >= dev_sectors) 1654 goto out_of_range; 1655 if ((block + n_block) > dev_sectors) 1656 goto out_of_range; 1657 1658 if (dev->flags & ATA_DFLAG_LBA) { 1659 tf->flags |= ATA_TFLAG_LBA; 1660 1661 if (lba_28_ok(block, n_block)) { 1662 /* use LBA28 */ 1663 tf->command = ATA_CMD_VERIFY; 1664 tf->device |= (block >> 24) & 0xf; 1665 } else if (lba_48_ok(block, n_block)) { 1666 if (!(dev->flags & ATA_DFLAG_LBA48)) 1667 goto out_of_range; 1668 1669 /* use LBA48 */ 1670 tf->flags |= ATA_TFLAG_LBA48; 1671 tf->command = ATA_CMD_VERIFY_EXT; 1672 1673 tf->hob_nsect = (n_block >> 8) & 0xff; 1674 1675 tf->hob_lbah = (block >> 40) & 0xff; 1676 tf->hob_lbam = (block >> 32) & 0xff; 1677 tf->hob_lbal = (block >> 24) & 0xff; 1678 } else 1679 /* request too large even for LBA48 */ 1680 goto out_of_range; 1681 1682 tf->nsect = n_block & 0xff; 1683 1684 tf->lbah = (block >> 16) & 0xff; 1685 tf->lbam = (block >> 8) & 0xff; 1686 tf->lbal = block & 0xff; 1687 1688 tf->device |= ATA_LBA; 1689 } else { 1690 /* CHS */ 1691 u32 sect, head, cyl, track; 1692 1693 if (!lba_28_ok(block, n_block)) 1694 goto out_of_range; 1695 1696 /* Convert LBA to CHS */ 1697 track = (u32)block / dev->sectors; 1698 cyl = track / dev->heads; 1699 head = track % dev->heads; 1700 sect = (u32)block % dev->sectors + 1; 1701 1702 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1703 (u32)block, track, cyl, head, sect); 1704 1705 /* Check whether the converted CHS can fit. 1706 Cylinder: 0-65535 1707 Head: 0-15 1708 Sector: 1-255*/ 1709 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1710 goto out_of_range; 1711 1712 tf->command = ATA_CMD_VERIFY; 1713 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1714 tf->lbal = sect; 1715 tf->lbam = cyl; 1716 tf->lbah = cyl >> 8; 1717 tf->device |= head; 1718 } 1719 1720 return 0; 1721 1722 invalid_fld: 1723 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1724 return 1; 1725 1726 out_of_range: 1727 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1728 /* "Logical Block Address out of range" */ 1729 return 1; 1730 1731 nothing_to_do: 1732 scmd->result = SAM_STAT_GOOD; 1733 return 1; 1734 } 1735 1736 /** 1737 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1738 * @qc: Storage for translated ATA taskfile 1739 * 1740 * Converts any of six SCSI read/write commands into the 1741 * ATA counterpart, including starting sector (LBA), 1742 * sector count, and taking into account the device's LBA48 1743 * support. 1744 * 1745 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1746 * %WRITE_16 are currently supported. 1747 * 1748 * LOCKING: 1749 * spin_lock_irqsave(host lock) 1750 * 1751 * RETURNS: 1752 * Zero on success, non-zero on error. 1753 */ 1754 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1755 { 1756 struct scsi_cmnd *scmd = qc->scsicmd; 1757 const u8 *cdb = scmd->cmnd; 1758 unsigned int tf_flags = 0; 1759 u64 block; 1760 u32 n_block; 1761 int rc; 1762 u16 fp = 0; 1763 1764 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1765 tf_flags |= ATA_TFLAG_WRITE; 1766 1767 /* Calculate the SCSI LBA, transfer length and FUA. */ 1768 switch (cdb[0]) { 1769 case READ_10: 1770 case WRITE_10: 1771 if (unlikely(scmd->cmd_len < 10)) { 1772 fp = 9; 1773 goto invalid_fld; 1774 } 1775 scsi_10_lba_len(cdb, &block, &n_block); 1776 if (cdb[1] & (1 << 3)) 1777 tf_flags |= ATA_TFLAG_FUA; 1778 break; 1779 case READ_6: 1780 case WRITE_6: 1781 if (unlikely(scmd->cmd_len < 6)) { 1782 fp = 5; 1783 goto invalid_fld; 1784 } 1785 scsi_6_lba_len(cdb, &block, &n_block); 1786 1787 /* for 6-byte r/w commands, transfer length 0 1788 * means 256 blocks of data, not 0 block. 1789 */ 1790 if (!n_block) 1791 n_block = 256; 1792 break; 1793 case READ_16: 1794 case WRITE_16: 1795 if (unlikely(scmd->cmd_len < 16)) { 1796 fp = 15; 1797 goto invalid_fld; 1798 } 1799 scsi_16_lba_len(cdb, &block, &n_block); 1800 if (cdb[1] & (1 << 3)) 1801 tf_flags |= ATA_TFLAG_FUA; 1802 break; 1803 default: 1804 DPRINTK("no-byte command\n"); 1805 fp = 0; 1806 goto invalid_fld; 1807 } 1808 1809 /* Check and compose ATA command */ 1810 if (!n_block) 1811 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1812 * length 0 means transfer 0 block of data. 1813 * However, for ATA R/W commands, sector count 0 means 1814 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1815 * 1816 * WARNING: one or two older ATA drives treat 0 as 0... 1817 */ 1818 goto nothing_to_do; 1819 1820 qc->flags |= ATA_QCFLAG_IO; 1821 qc->nbytes = n_block * scmd->device->sector_size; 1822 1823 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1824 qc->tag); 1825 if (likely(rc == 0)) 1826 return 0; 1827 1828 if (rc == -ERANGE) 1829 goto out_of_range; 1830 /* treat all other errors as -EINVAL, fall through */ 1831 invalid_fld: 1832 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1833 return 1; 1834 1835 out_of_range: 1836 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1837 /* "Logical Block Address out of range" */ 1838 return 1; 1839 1840 nothing_to_do: 1841 scmd->result = SAM_STAT_GOOD; 1842 return 1; 1843 } 1844 1845 static void ata_qc_done(struct ata_queued_cmd *qc) 1846 { 1847 struct scsi_cmnd *cmd = qc->scsicmd; 1848 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1849 1850 ata_qc_free(qc); 1851 done(cmd); 1852 } 1853 1854 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1855 { 1856 struct ata_port *ap = qc->ap; 1857 struct scsi_cmnd *cmd = qc->scsicmd; 1858 u8 *cdb = cmd->cmnd; 1859 int need_sense = (qc->err_mask != 0); 1860 1861 /* For ATA pass thru (SAT) commands, generate a sense block if 1862 * user mandated it or if there's an error. Note that if we 1863 * generate because the user forced us to [CK_COND =1], a check 1864 * condition is generated and the ATA register values are returned 1865 * whether the command completed successfully or not. If there 1866 * was no error, we use the following sense data: 1867 * sk = RECOVERED ERROR 1868 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1869 */ 1870 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1871 ((cdb[2] & 0x20) || need_sense)) 1872 ata_gen_passthru_sense(qc); 1873 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1874 cmd->result = SAM_STAT_CHECK_CONDITION; 1875 else if (need_sense) 1876 ata_gen_ata_sense(qc); 1877 else 1878 cmd->result = SAM_STAT_GOOD; 1879 1880 if (need_sense && !ap->ops->error_handler) 1881 ata_dump_status(ap->print_id, &qc->result_tf); 1882 1883 ata_qc_done(qc); 1884 } 1885 1886 /** 1887 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1888 * @dev: ATA device to which the command is addressed 1889 * @cmd: SCSI command to execute 1890 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1891 * 1892 * Our ->queuecommand() function has decided that the SCSI 1893 * command issued can be directly translated into an ATA 1894 * command, rather than handled internally. 1895 * 1896 * This function sets up an ata_queued_cmd structure for the 1897 * SCSI command, and sends that ata_queued_cmd to the hardware. 1898 * 1899 * The xlat_func argument (actor) returns 0 if ready to execute 1900 * ATA command, else 1 to finish translation. If 1 is returned 1901 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1902 * to be set reflecting an error condition or clean (early) 1903 * termination. 1904 * 1905 * LOCKING: 1906 * spin_lock_irqsave(host lock) 1907 * 1908 * RETURNS: 1909 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1910 * needs to be deferred. 1911 */ 1912 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1913 ata_xlat_func_t xlat_func) 1914 { 1915 struct ata_port *ap = dev->link->ap; 1916 struct ata_queued_cmd *qc; 1917 int rc; 1918 1919 VPRINTK("ENTER\n"); 1920 1921 qc = ata_scsi_qc_new(dev, cmd); 1922 if (!qc) 1923 goto err_mem; 1924 1925 /* data is present; dma-map it */ 1926 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1927 cmd->sc_data_direction == DMA_TO_DEVICE) { 1928 if (unlikely(scsi_bufflen(cmd) < 1)) { 1929 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1930 goto err_did; 1931 } 1932 1933 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1934 1935 qc->dma_dir = cmd->sc_data_direction; 1936 } 1937 1938 qc->complete_fn = ata_scsi_qc_complete; 1939 1940 if (xlat_func(qc)) 1941 goto early_finish; 1942 1943 if (ap->ops->qc_defer) { 1944 if ((rc = ap->ops->qc_defer(qc))) 1945 goto defer; 1946 } 1947 1948 /* select device, send command to hardware */ 1949 ata_qc_issue(qc); 1950 1951 VPRINTK("EXIT\n"); 1952 return 0; 1953 1954 early_finish: 1955 ata_qc_free(qc); 1956 cmd->scsi_done(cmd); 1957 DPRINTK("EXIT - early finish (good or error)\n"); 1958 return 0; 1959 1960 err_did: 1961 ata_qc_free(qc); 1962 cmd->result = (DID_ERROR << 16); 1963 cmd->scsi_done(cmd); 1964 err_mem: 1965 DPRINTK("EXIT - internal\n"); 1966 return 0; 1967 1968 defer: 1969 ata_qc_free(qc); 1970 DPRINTK("EXIT - defer\n"); 1971 if (rc == ATA_DEFER_LINK) 1972 return SCSI_MLQUEUE_DEVICE_BUSY; 1973 else 1974 return SCSI_MLQUEUE_HOST_BUSY; 1975 } 1976 1977 /** 1978 * ata_scsi_rbuf_get - Map response buffer. 1979 * @cmd: SCSI command containing buffer to be mapped. 1980 * @flags: unsigned long variable to store irq enable status 1981 * @copy_in: copy in from user buffer 1982 * 1983 * Prepare buffer for simulated SCSI commands. 1984 * 1985 * LOCKING: 1986 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 1987 * 1988 * RETURNS: 1989 * Pointer to response buffer. 1990 */ 1991 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 1992 unsigned long *flags) 1993 { 1994 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 1995 1996 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1997 if (copy_in) 1998 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 1999 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2000 return ata_scsi_rbuf; 2001 } 2002 2003 /** 2004 * ata_scsi_rbuf_put - Unmap response buffer. 2005 * @cmd: SCSI command containing buffer to be unmapped. 2006 * @copy_out: copy out result 2007 * @flags: @flags passed to ata_scsi_rbuf_get() 2008 * 2009 * Returns rbuf buffer. The result is copied to @cmd's buffer if 2010 * @copy_back is true. 2011 * 2012 * LOCKING: 2013 * Unlocks ata_scsi_rbuf_lock. 2014 */ 2015 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 2016 unsigned long *flags) 2017 { 2018 if (copy_out) 2019 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2020 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2021 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 2022 } 2023 2024 /** 2025 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 2026 * @args: device IDENTIFY data / SCSI command of interest. 2027 * @actor: Callback hook for desired SCSI command simulator 2028 * 2029 * Takes care of the hard work of simulating a SCSI command... 2030 * Mapping the response buffer, calling the command's handler, 2031 * and handling the handler's return value. This return value 2032 * indicates whether the handler wishes the SCSI command to be 2033 * completed successfully (0), or not (in which case cmd->result 2034 * and sense buffer are assumed to be set). 2035 * 2036 * LOCKING: 2037 * spin_lock_irqsave(host lock) 2038 */ 2039 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 2040 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 2041 { 2042 u8 *rbuf; 2043 unsigned int rc; 2044 struct scsi_cmnd *cmd = args->cmd; 2045 unsigned long flags; 2046 2047 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 2048 rc = actor(args, rbuf); 2049 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 2050 2051 if (rc == 0) 2052 cmd->result = SAM_STAT_GOOD; 2053 args->done(cmd); 2054 } 2055 2056 /** 2057 * ata_scsiop_inq_std - Simulate INQUIRY command 2058 * @args: device IDENTIFY data / SCSI command of interest. 2059 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2060 * 2061 * Returns standard device identification data associated 2062 * with non-VPD INQUIRY command output. 2063 * 2064 * LOCKING: 2065 * spin_lock_irqsave(host lock) 2066 */ 2067 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 2068 { 2069 const u8 versions[] = { 2070 0x00, 2071 0x60, /* SAM-3 (no version claimed) */ 2072 2073 0x03, 2074 0x20, /* SBC-2 (no version claimed) */ 2075 2076 0x03, 2077 0x00 /* SPC-3 (no version claimed) */ 2078 }; 2079 const u8 versions_zbc[] = { 2080 0x00, 2081 0xA0, /* SAM-5 (no version claimed) */ 2082 2083 0x06, 2084 0x00, /* SBC-4 (no version claimed) */ 2085 2086 0x05, 2087 0xC0, /* SPC-5 (no version claimed) */ 2088 2089 0x60, 2090 0x24, /* ZBC r05 */ 2091 }; 2092 2093 u8 hdr[] = { 2094 TYPE_DISK, 2095 0, 2096 0x5, /* claim SPC-3 version compatibility */ 2097 2, 2098 95 - 4, 2099 0, 2100 0, 2101 2 2102 }; 2103 2104 VPRINTK("ENTER\n"); 2105 2106 /* set scsi removable (RMB) bit per ata bit, or if the 2107 * AHCI port says it's external (Hotplug-capable, eSATA). 2108 */ 2109 if (ata_id_removable(args->id) || 2110 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 2111 hdr[1] |= (1 << 7); 2112 2113 if (args->dev->class == ATA_DEV_ZAC) { 2114 hdr[0] = TYPE_ZBC; 2115 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 2116 } 2117 2118 memcpy(rbuf, hdr, sizeof(hdr)); 2119 memcpy(&rbuf[8], "ATA ", 8); 2120 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 2121 2122 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2123 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2124 if (strncmp(&rbuf[32], " ", 4) == 0) 2125 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2126 2127 if (rbuf[32] == 0 || rbuf[32] == ' ') 2128 memcpy(&rbuf[32], "n/a ", 4); 2129 2130 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 2131 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2132 else 2133 memcpy(rbuf + 58, versions, sizeof(versions)); 2134 2135 return 0; 2136 } 2137 2138 /** 2139 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2140 * @args: device IDENTIFY data / SCSI command of interest. 2141 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2142 * 2143 * Returns list of inquiry VPD pages available. 2144 * 2145 * LOCKING: 2146 * spin_lock_irqsave(host lock) 2147 */ 2148 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 2149 { 2150 int num_pages; 2151 const u8 pages[] = { 2152 0x00, /* page 0x00, this page */ 2153 0x80, /* page 0x80, unit serial no page */ 2154 0x83, /* page 0x83, device ident page */ 2155 0x89, /* page 0x89, ata info page */ 2156 0xb0, /* page 0xb0, block limits page */ 2157 0xb1, /* page 0xb1, block device characteristics page */ 2158 0xb2, /* page 0xb2, thin provisioning page */ 2159 0xb6, /* page 0xb6, zoned block device characteristics */ 2160 }; 2161 2162 num_pages = sizeof(pages); 2163 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 2164 num_pages--; 2165 rbuf[3] = num_pages; /* number of supported VPD pages */ 2166 memcpy(rbuf + 4, pages, num_pages); 2167 return 0; 2168 } 2169 2170 /** 2171 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2172 * @args: device IDENTIFY data / SCSI command of interest. 2173 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2174 * 2175 * Returns ATA device serial number. 2176 * 2177 * LOCKING: 2178 * spin_lock_irqsave(host lock) 2179 */ 2180 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2181 { 2182 const u8 hdr[] = { 2183 0, 2184 0x80, /* this page code */ 2185 0, 2186 ATA_ID_SERNO_LEN, /* page len */ 2187 }; 2188 2189 memcpy(rbuf, hdr, sizeof(hdr)); 2190 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2191 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2192 return 0; 2193 } 2194 2195 /** 2196 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2197 * @args: device IDENTIFY data / SCSI command of interest. 2198 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2199 * 2200 * Yields two logical unit device identification designators: 2201 * - vendor specific ASCII containing the ATA serial number 2202 * - SAT defined "t10 vendor id based" containing ASCII vendor 2203 * name ("ATA "), model and serial numbers. 2204 * 2205 * LOCKING: 2206 * spin_lock_irqsave(host lock) 2207 */ 2208 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2209 { 2210 const int sat_model_serial_desc_len = 68; 2211 int num; 2212 2213 rbuf[1] = 0x83; /* this page code */ 2214 num = 4; 2215 2216 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2217 rbuf[num + 0] = 2; 2218 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2219 num += 4; 2220 ata_id_string(args->id, (unsigned char *) rbuf + num, 2221 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2222 num += ATA_ID_SERNO_LEN; 2223 2224 /* SAT defined lu model and serial numbers descriptor */ 2225 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2226 rbuf[num + 0] = 2; 2227 rbuf[num + 1] = 1; 2228 rbuf[num + 3] = sat_model_serial_desc_len; 2229 num += 4; 2230 memcpy(rbuf + num, "ATA ", 8); 2231 num += 8; 2232 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2233 ATA_ID_PROD_LEN); 2234 num += ATA_ID_PROD_LEN; 2235 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2236 ATA_ID_SERNO_LEN); 2237 num += ATA_ID_SERNO_LEN; 2238 2239 if (ata_id_has_wwn(args->id)) { 2240 /* SAT defined lu world wide name */ 2241 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2242 rbuf[num + 0] = 1; 2243 rbuf[num + 1] = 3; 2244 rbuf[num + 3] = ATA_ID_WWN_LEN; 2245 num += 4; 2246 ata_id_string(args->id, (unsigned char *) rbuf + num, 2247 ATA_ID_WWN, ATA_ID_WWN_LEN); 2248 num += ATA_ID_WWN_LEN; 2249 } 2250 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2251 return 0; 2252 } 2253 2254 /** 2255 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2256 * @args: device IDENTIFY data / SCSI command of interest. 2257 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2258 * 2259 * Yields SAT-specified ATA VPD page. 2260 * 2261 * LOCKING: 2262 * spin_lock_irqsave(host lock) 2263 */ 2264 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2265 { 2266 struct ata_taskfile tf; 2267 2268 memset(&tf, 0, sizeof(tf)); 2269 2270 rbuf[1] = 0x89; /* our page code */ 2271 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2272 rbuf[3] = (0x238 & 0xff); 2273 2274 memcpy(&rbuf[8], "linux ", 8); 2275 memcpy(&rbuf[16], "libata ", 16); 2276 memcpy(&rbuf[32], DRV_VERSION, 4); 2277 2278 /* we don't store the ATA device signature, so we fake it */ 2279 2280 tf.command = ATA_DRDY; /* really, this is Status reg */ 2281 tf.lbal = 0x1; 2282 tf.nsect = 0x1; 2283 2284 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2285 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2286 2287 rbuf[56] = ATA_CMD_ID_ATA; 2288 2289 memcpy(&rbuf[60], &args->id[0], 512); 2290 return 0; 2291 } 2292 2293 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2294 { 2295 u16 min_io_sectors; 2296 2297 rbuf[1] = 0xb0; 2298 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2299 2300 /* 2301 * Optimal transfer length granularity. 2302 * 2303 * This is always one physical block, but for disks with a smaller 2304 * logical than physical sector size we need to figure out what the 2305 * latter is. 2306 */ 2307 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2308 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2309 2310 /* 2311 * Optimal unmap granularity. 2312 * 2313 * The ATA spec doesn't even know about a granularity or alignment 2314 * for the TRIM command. We can leave away most of the unmap related 2315 * VPD page entries, but we have specifify a granularity to signal 2316 * that we support some form of unmap - in thise case via WRITE SAME 2317 * with the unmap bit set. 2318 */ 2319 if (ata_id_has_trim(args->id)) { 2320 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); 2321 put_unaligned_be32(1, &rbuf[28]); 2322 } 2323 2324 return 0; 2325 } 2326 2327 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2328 { 2329 int form_factor = ata_id_form_factor(args->id); 2330 int media_rotation_rate = ata_id_rotation_rate(args->id); 2331 u8 zoned = ata_id_zoned_cap(args->id); 2332 2333 rbuf[1] = 0xb1; 2334 rbuf[3] = 0x3c; 2335 rbuf[4] = media_rotation_rate >> 8; 2336 rbuf[5] = media_rotation_rate; 2337 rbuf[7] = form_factor; 2338 if (zoned) 2339 rbuf[8] = (zoned << 4); 2340 2341 return 0; 2342 } 2343 2344 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2345 { 2346 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2347 rbuf[1] = 0xb2; 2348 rbuf[3] = 0x4; 2349 rbuf[5] = 1 << 6; /* TPWS */ 2350 2351 return 0; 2352 } 2353 2354 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2355 { 2356 /* 2357 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2358 */ 2359 rbuf[1] = 0xb6; 2360 rbuf[3] = 0x3C; 2361 2362 /* 2363 * URSWRZ bit is only meaningful for host-managed ZAC drives 2364 */ 2365 if (args->dev->zac_zoned_cap & 1) 2366 rbuf[4] |= 1; 2367 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2368 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2369 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2370 2371 return 0; 2372 } 2373 2374 /** 2375 * ata_scsiop_noop - Command handler that simply returns success. 2376 * @args: device IDENTIFY data / SCSI command of interest. 2377 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2378 * 2379 * No operation. Simply returns success to caller, to indicate 2380 * that the caller should successfully complete this SCSI command. 2381 * 2382 * LOCKING: 2383 * spin_lock_irqsave(host lock) 2384 */ 2385 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) 2386 { 2387 VPRINTK("ENTER\n"); 2388 return 0; 2389 } 2390 2391 /** 2392 * modecpy - Prepare response for MODE SENSE 2393 * @dest: output buffer 2394 * @src: data being copied 2395 * @n: length of mode page 2396 * @changeable: whether changeable parameters are requested 2397 * 2398 * Generate a generic MODE SENSE page for either current or changeable 2399 * parameters. 2400 * 2401 * LOCKING: 2402 * None. 2403 */ 2404 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2405 { 2406 if (changeable) { 2407 memcpy(dest, src, 2); 2408 memset(dest + 2, 0, n - 2); 2409 } else { 2410 memcpy(dest, src, n); 2411 } 2412 } 2413 2414 /** 2415 * ata_msense_caching - Simulate MODE SENSE caching info page 2416 * @id: device IDENTIFY data 2417 * @buf: output buffer 2418 * @changeable: whether changeable parameters are requested 2419 * 2420 * Generate a caching info page, which conditionally indicates 2421 * write caching to the SCSI layer, depending on device 2422 * capabilities. 2423 * 2424 * LOCKING: 2425 * None. 2426 */ 2427 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2428 { 2429 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2430 if (changeable) { 2431 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2432 } else { 2433 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2434 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2435 } 2436 return sizeof(def_cache_mpage); 2437 } 2438 2439 /** 2440 * ata_msense_control - Simulate MODE SENSE control mode page 2441 * @dev: ATA device of interest 2442 * @buf: output buffer 2443 * @changeable: whether changeable parameters are requested 2444 * 2445 * Generate a generic MODE SENSE control mode page. 2446 * 2447 * LOCKING: 2448 * None. 2449 */ 2450 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2451 bool changeable) 2452 { 2453 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2454 if (changeable) { 2455 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2456 } else { 2457 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2458 2459 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2460 } 2461 return sizeof(def_control_mpage); 2462 } 2463 2464 /** 2465 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2466 * @buf: output buffer 2467 * @changeable: whether changeable parameters are requested 2468 * 2469 * Generate a generic MODE SENSE r/w error recovery page. 2470 * 2471 * LOCKING: 2472 * None. 2473 */ 2474 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2475 { 2476 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2477 changeable); 2478 return sizeof(def_rw_recovery_mpage); 2479 } 2480 2481 /* 2482 * We can turn this into a real blacklist if it's needed, for now just 2483 * blacklist any Maxtor BANC1G10 revision firmware 2484 */ 2485 static int ata_dev_supports_fua(u16 *id) 2486 { 2487 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2488 2489 if (!libata_fua) 2490 return 0; 2491 if (!ata_id_has_fua(id)) 2492 return 0; 2493 2494 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2495 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2496 2497 if (strcmp(model, "Maxtor")) 2498 return 1; 2499 if (strcmp(fw, "BANC1G10")) 2500 return 1; 2501 2502 return 0; /* blacklisted */ 2503 } 2504 2505 /** 2506 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2507 * @args: device IDENTIFY data / SCSI command of interest. 2508 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2509 * 2510 * Simulate MODE SENSE commands. Assume this is invoked for direct 2511 * access devices (e.g. disks) only. There should be no block 2512 * descriptor for other device types. 2513 * 2514 * LOCKING: 2515 * spin_lock_irqsave(host lock) 2516 */ 2517 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2518 { 2519 struct ata_device *dev = args->dev; 2520 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2521 const u8 sat_blk_desc[] = { 2522 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2523 0, 2524 0, 0x2, 0x0 /* block length: 512 bytes */ 2525 }; 2526 u8 pg, spg; 2527 unsigned int ebd, page_control, six_byte; 2528 u8 dpofua, bp = 0xff; 2529 u16 fp; 2530 2531 VPRINTK("ENTER\n"); 2532 2533 six_byte = (scsicmd[0] == MODE_SENSE); 2534 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2535 /* 2536 * LLBA bit in msense(10) ignored (compliant) 2537 */ 2538 2539 page_control = scsicmd[2] >> 6; 2540 switch (page_control) { 2541 case 0: /* current */ 2542 case 1: /* changeable */ 2543 case 2: /* defaults */ 2544 break; /* supported */ 2545 case 3: /* saved */ 2546 goto saving_not_supp; 2547 default: 2548 fp = 2; 2549 bp = 6; 2550 goto invalid_fld; 2551 } 2552 2553 if (six_byte) 2554 p += 4 + (ebd ? 8 : 0); 2555 else 2556 p += 8 + (ebd ? 8 : 0); 2557 2558 pg = scsicmd[2] & 0x3f; 2559 spg = scsicmd[3]; 2560 /* 2561 * No mode subpages supported (yet) but asking for _all_ 2562 * subpages may be valid 2563 */ 2564 if (spg && (spg != ALL_SUB_MPAGES)) { 2565 fp = 3; 2566 goto invalid_fld; 2567 } 2568 2569 switch(pg) { 2570 case RW_RECOVERY_MPAGE: 2571 p += ata_msense_rw_recovery(p, page_control == 1); 2572 break; 2573 2574 case CACHE_MPAGE: 2575 p += ata_msense_caching(args->id, p, page_control == 1); 2576 break; 2577 2578 case CONTROL_MPAGE: 2579 p += ata_msense_control(args->dev, p, page_control == 1); 2580 break; 2581 2582 case ALL_MPAGES: 2583 p += ata_msense_rw_recovery(p, page_control == 1); 2584 p += ata_msense_caching(args->id, p, page_control == 1); 2585 p += ata_msense_control(args->dev, p, page_control == 1); 2586 break; 2587 2588 default: /* invalid page code */ 2589 fp = 2; 2590 goto invalid_fld; 2591 } 2592 2593 dpofua = 0; 2594 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2595 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2596 dpofua = 1 << 4; 2597 2598 if (six_byte) { 2599 rbuf[0] = p - rbuf - 1; 2600 rbuf[2] |= dpofua; 2601 if (ebd) { 2602 rbuf[3] = sizeof(sat_blk_desc); 2603 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2604 } 2605 } else { 2606 unsigned int output_len = p - rbuf - 2; 2607 2608 rbuf[0] = output_len >> 8; 2609 rbuf[1] = output_len; 2610 rbuf[3] |= dpofua; 2611 if (ebd) { 2612 rbuf[7] = sizeof(sat_blk_desc); 2613 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2614 } 2615 } 2616 return 0; 2617 2618 invalid_fld: 2619 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2620 return 1; 2621 2622 saving_not_supp: 2623 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2624 /* "Saving parameters not supported" */ 2625 return 1; 2626 } 2627 2628 /** 2629 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2630 * @args: device IDENTIFY data / SCSI command of interest. 2631 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2632 * 2633 * Simulate READ CAPACITY commands. 2634 * 2635 * LOCKING: 2636 * None. 2637 */ 2638 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2639 { 2640 struct ata_device *dev = args->dev; 2641 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2642 u32 sector_size; /* physical sector size in bytes */ 2643 u8 log2_per_phys; 2644 u16 lowest_aligned; 2645 2646 sector_size = ata_id_logical_sector_size(dev->id); 2647 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2648 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2649 2650 VPRINTK("ENTER\n"); 2651 2652 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2653 if (last_lba >= 0xffffffffULL) 2654 last_lba = 0xffffffff; 2655 2656 /* sector count, 32-bit */ 2657 rbuf[0] = last_lba >> (8 * 3); 2658 rbuf[1] = last_lba >> (8 * 2); 2659 rbuf[2] = last_lba >> (8 * 1); 2660 rbuf[3] = last_lba; 2661 2662 /* sector size */ 2663 rbuf[4] = sector_size >> (8 * 3); 2664 rbuf[5] = sector_size >> (8 * 2); 2665 rbuf[6] = sector_size >> (8 * 1); 2666 rbuf[7] = sector_size; 2667 } else { 2668 /* sector count, 64-bit */ 2669 rbuf[0] = last_lba >> (8 * 7); 2670 rbuf[1] = last_lba >> (8 * 6); 2671 rbuf[2] = last_lba >> (8 * 5); 2672 rbuf[3] = last_lba >> (8 * 4); 2673 rbuf[4] = last_lba >> (8 * 3); 2674 rbuf[5] = last_lba >> (8 * 2); 2675 rbuf[6] = last_lba >> (8 * 1); 2676 rbuf[7] = last_lba; 2677 2678 /* sector size */ 2679 rbuf[ 8] = sector_size >> (8 * 3); 2680 rbuf[ 9] = sector_size >> (8 * 2); 2681 rbuf[10] = sector_size >> (8 * 1); 2682 rbuf[11] = sector_size; 2683 2684 rbuf[12] = 0; 2685 rbuf[13] = log2_per_phys; 2686 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2687 rbuf[15] = lowest_aligned; 2688 2689 if (ata_id_has_trim(args->id) && 2690 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2691 rbuf[14] |= 0x80; /* LBPME */ 2692 2693 if (ata_id_has_zero_after_trim(args->id) && 2694 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2695 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2696 rbuf[14] |= 0x40; /* LBPRZ */ 2697 } 2698 } 2699 if (ata_id_zoned_cap(args->id) || 2700 args->dev->class == ATA_DEV_ZAC) 2701 rbuf[12] = (1 << 4); /* RC_BASIS */ 2702 } 2703 return 0; 2704 } 2705 2706 /** 2707 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2708 * @args: device IDENTIFY data / SCSI command of interest. 2709 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2710 * 2711 * Simulate REPORT LUNS command. 2712 * 2713 * LOCKING: 2714 * spin_lock_irqsave(host lock) 2715 */ 2716 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2717 { 2718 VPRINTK("ENTER\n"); 2719 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2720 2721 return 0; 2722 } 2723 2724 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2725 { 2726 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2727 /* FIXME: not quite right; we don't want the 2728 * translation of taskfile registers into 2729 * a sense descriptors, since that's only 2730 * correct for ATA, not ATAPI 2731 */ 2732 ata_gen_passthru_sense(qc); 2733 } 2734 2735 ata_qc_done(qc); 2736 } 2737 2738 /* is it pointless to prefer PIO for "safety reasons"? */ 2739 static inline int ata_pio_use_silly(struct ata_port *ap) 2740 { 2741 return (ap->flags & ATA_FLAG_PIO_DMA); 2742 } 2743 2744 static void atapi_request_sense(struct ata_queued_cmd *qc) 2745 { 2746 struct ata_port *ap = qc->ap; 2747 struct scsi_cmnd *cmd = qc->scsicmd; 2748 2749 DPRINTK("ATAPI request sense\n"); 2750 2751 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2752 2753 #ifdef CONFIG_ATA_SFF 2754 if (ap->ops->sff_tf_read) 2755 ap->ops->sff_tf_read(ap, &qc->tf); 2756 #endif 2757 2758 /* fill these in, for the case where they are -not- overwritten */ 2759 cmd->sense_buffer[0] = 0x70; 2760 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2761 2762 ata_qc_reinit(qc); 2763 2764 /* setup sg table and init transfer direction */ 2765 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2766 ata_sg_init(qc, &qc->sgent, 1); 2767 qc->dma_dir = DMA_FROM_DEVICE; 2768 2769 memset(&qc->cdb, 0, qc->dev->cdb_len); 2770 qc->cdb[0] = REQUEST_SENSE; 2771 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2772 2773 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2774 qc->tf.command = ATA_CMD_PACKET; 2775 2776 if (ata_pio_use_silly(ap)) { 2777 qc->tf.protocol = ATAPI_PROT_DMA; 2778 qc->tf.feature |= ATAPI_PKT_DMA; 2779 } else { 2780 qc->tf.protocol = ATAPI_PROT_PIO; 2781 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2782 qc->tf.lbah = 0; 2783 } 2784 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2785 2786 qc->complete_fn = atapi_sense_complete; 2787 2788 ata_qc_issue(qc); 2789 2790 DPRINTK("EXIT\n"); 2791 } 2792 2793 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2794 { 2795 struct scsi_cmnd *cmd = qc->scsicmd; 2796 unsigned int err_mask = qc->err_mask; 2797 2798 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2799 2800 /* handle completion from new EH */ 2801 if (unlikely(qc->ap->ops->error_handler && 2802 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2803 2804 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2805 /* FIXME: not quite right; we don't want the 2806 * translation of taskfile registers into a 2807 * sense descriptors, since that's only 2808 * correct for ATA, not ATAPI 2809 */ 2810 ata_gen_passthru_sense(qc); 2811 } 2812 2813 /* SCSI EH automatically locks door if sdev->locked is 2814 * set. Sometimes door lock request continues to 2815 * fail, for example, when no media is present. This 2816 * creates a loop - SCSI EH issues door lock which 2817 * fails and gets invoked again to acquire sense data 2818 * for the failed command. 2819 * 2820 * If door lock fails, always clear sdev->locked to 2821 * avoid this infinite loop. 2822 * 2823 * This may happen before SCSI scan is complete. Make 2824 * sure qc->dev->sdev isn't NULL before dereferencing. 2825 */ 2826 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2827 qc->dev->sdev->locked = 0; 2828 2829 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2830 ata_qc_done(qc); 2831 return; 2832 } 2833 2834 /* successful completion or old EH failure path */ 2835 if (unlikely(err_mask & AC_ERR_DEV)) { 2836 cmd->result = SAM_STAT_CHECK_CONDITION; 2837 atapi_request_sense(qc); 2838 return; 2839 } else if (unlikely(err_mask)) { 2840 /* FIXME: not quite right; we don't want the 2841 * translation of taskfile registers into 2842 * a sense descriptors, since that's only 2843 * correct for ATA, not ATAPI 2844 */ 2845 ata_gen_passthru_sense(qc); 2846 } else { 2847 u8 *scsicmd = cmd->cmnd; 2848 2849 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { 2850 unsigned long flags; 2851 u8 *buf; 2852 2853 buf = ata_scsi_rbuf_get(cmd, true, &flags); 2854 2855 /* ATAPI devices typically report zero for their SCSI version, 2856 * and sometimes deviate from the spec WRT response data 2857 * format. If SCSI version is reported as zero like normal, 2858 * then we make the following fixups: 1) Fake MMC-5 version, 2859 * to indicate to the Linux scsi midlayer this is a modern 2860 * device. 2) Ensure response data format / ATAPI information 2861 * are always correct. 2862 */ 2863 if (buf[2] == 0) { 2864 buf[2] = 0x5; 2865 buf[3] = 0x32; 2866 } 2867 2868 ata_scsi_rbuf_put(cmd, true, &flags); 2869 } 2870 2871 cmd->result = SAM_STAT_GOOD; 2872 } 2873 2874 ata_qc_done(qc); 2875 } 2876 /** 2877 * atapi_xlat - Initialize PACKET taskfile 2878 * @qc: command structure to be initialized 2879 * 2880 * LOCKING: 2881 * spin_lock_irqsave(host lock) 2882 * 2883 * RETURNS: 2884 * Zero on success, non-zero on failure. 2885 */ 2886 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2887 { 2888 struct scsi_cmnd *scmd = qc->scsicmd; 2889 struct ata_device *dev = qc->dev; 2890 int nodata = (scmd->sc_data_direction == DMA_NONE); 2891 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2892 unsigned int nbytes; 2893 2894 memset(qc->cdb, 0, dev->cdb_len); 2895 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2896 2897 qc->complete_fn = atapi_qc_complete; 2898 2899 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2900 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2901 qc->tf.flags |= ATA_TFLAG_WRITE; 2902 DPRINTK("direction: write\n"); 2903 } 2904 2905 qc->tf.command = ATA_CMD_PACKET; 2906 ata_qc_set_pc_nbytes(qc); 2907 2908 /* check whether ATAPI DMA is safe */ 2909 if (!nodata && !using_pio && atapi_check_dma(qc)) 2910 using_pio = 1; 2911 2912 /* Some controller variants snoop this value for Packet 2913 * transfers to do state machine and FIFO management. Thus we 2914 * want to set it properly, and for DMA where it is 2915 * effectively meaningless. 2916 */ 2917 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2918 2919 /* Most ATAPI devices which honor transfer chunk size don't 2920 * behave according to the spec when odd chunk size which 2921 * matches the transfer length is specified. If the number of 2922 * bytes to transfer is 2n+1. According to the spec, what 2923 * should happen is to indicate that 2n+1 is going to be 2924 * transferred and transfer 2n+2 bytes where the last byte is 2925 * padding. 2926 * 2927 * In practice, this doesn't happen. ATAPI devices first 2928 * indicate and transfer 2n bytes and then indicate and 2929 * transfer 2 bytes where the last byte is padding. 2930 * 2931 * This inconsistency confuses several controllers which 2932 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2933 * These controllers use actual number of transferred bytes to 2934 * update DMA poitner and transfer of 4n+2 bytes make those 2935 * controller push DMA pointer by 4n+4 bytes because SATA data 2936 * FISes are aligned to 4 bytes. This causes data corruption 2937 * and buffer overrun. 2938 * 2939 * Always setting nbytes to even number solves this problem 2940 * because then ATAPI devices don't have to split data at 2n 2941 * boundaries. 2942 */ 2943 if (nbytes & 0x1) 2944 nbytes++; 2945 2946 qc->tf.lbam = (nbytes & 0xFF); 2947 qc->tf.lbah = (nbytes >> 8); 2948 2949 if (nodata) 2950 qc->tf.protocol = ATAPI_PROT_NODATA; 2951 else if (using_pio) 2952 qc->tf.protocol = ATAPI_PROT_PIO; 2953 else { 2954 /* DMA data xfer */ 2955 qc->tf.protocol = ATAPI_PROT_DMA; 2956 qc->tf.feature |= ATAPI_PKT_DMA; 2957 2958 if ((dev->flags & ATA_DFLAG_DMADIR) && 2959 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2960 /* some SATA bridges need us to indicate data xfer direction */ 2961 qc->tf.feature |= ATAPI_DMADIR; 2962 } 2963 2964 2965 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2966 as ATAPI tape drives don't get this right otherwise */ 2967 return 0; 2968 } 2969 2970 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2971 { 2972 if (!sata_pmp_attached(ap)) { 2973 if (likely(devno < ata_link_max_devices(&ap->link))) 2974 return &ap->link.device[devno]; 2975 } else { 2976 if (likely(devno < ap->nr_pmp_links)) 2977 return &ap->pmp_link[devno].device[0]; 2978 } 2979 2980 return NULL; 2981 } 2982 2983 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2984 const struct scsi_device *scsidev) 2985 { 2986 int devno; 2987 2988 /* skip commands not addressed to targets we simulate */ 2989 if (!sata_pmp_attached(ap)) { 2990 if (unlikely(scsidev->channel || scsidev->lun)) 2991 return NULL; 2992 devno = scsidev->id; 2993 } else { 2994 if (unlikely(scsidev->id || scsidev->lun)) 2995 return NULL; 2996 devno = scsidev->channel; 2997 } 2998 2999 return ata_find_dev(ap, devno); 3000 } 3001 3002 /** 3003 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3004 * @ap: ATA port to which the device is attached 3005 * @scsidev: SCSI device from which we derive the ATA device 3006 * 3007 * Given various information provided in struct scsi_cmnd, 3008 * map that onto an ATA bus, and using that mapping 3009 * determine which ata_device is associated with the 3010 * SCSI command to be sent. 3011 * 3012 * LOCKING: 3013 * spin_lock_irqsave(host lock) 3014 * 3015 * RETURNS: 3016 * Associated ATA device, or %NULL if not found. 3017 */ 3018 static struct ata_device * 3019 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3020 { 3021 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3022 3023 if (unlikely(!dev || !ata_dev_enabled(dev))) 3024 return NULL; 3025 3026 return dev; 3027 } 3028 3029 /* 3030 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3031 * @byte1: Byte 1 from pass-thru CDB. 3032 * 3033 * RETURNS: 3034 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3035 */ 3036 static u8 3037 ata_scsi_map_proto(u8 byte1) 3038 { 3039 switch((byte1 & 0x1e) >> 1) { 3040 case 3: /* Non-data */ 3041 return ATA_PROT_NODATA; 3042 3043 case 6: /* DMA */ 3044 case 10: /* UDMA Data-in */ 3045 case 11: /* UDMA Data-Out */ 3046 return ATA_PROT_DMA; 3047 3048 case 4: /* PIO Data-in */ 3049 case 5: /* PIO Data-out */ 3050 return ATA_PROT_PIO; 3051 3052 case 12: /* FPDMA */ 3053 return ATA_PROT_NCQ; 3054 3055 case 0: /* Hard Reset */ 3056 case 1: /* SRST */ 3057 case 8: /* Device Diagnostic */ 3058 case 9: /* Device Reset */ 3059 case 7: /* DMA Queued */ 3060 case 15: /* Return Response Info */ 3061 default: /* Reserved */ 3062 break; 3063 } 3064 3065 return ATA_PROT_UNKNOWN; 3066 } 3067 3068 /** 3069 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3070 * @qc: command structure to be initialized 3071 * 3072 * Handles either 12 or 16-byte versions of the CDB. 3073 * 3074 * RETURNS: 3075 * Zero on success, non-zero on failure. 3076 */ 3077 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3078 { 3079 struct ata_taskfile *tf = &(qc->tf); 3080 struct scsi_cmnd *scmd = qc->scsicmd; 3081 struct ata_device *dev = qc->dev; 3082 const u8 *cdb = scmd->cmnd; 3083 u16 fp; 3084 3085 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) { 3086 fp = 1; 3087 goto invalid_fld; 3088 } 3089 3090 if (ata_is_ncq(tf->protocol) && (cdb[2] & 0x3) == 0) 3091 tf->protocol = ATA_PROT_NCQ_NODATA; 3092 3093 /* enable LBA */ 3094 tf->flags |= ATA_TFLAG_LBA; 3095 3096 /* 3097 * 12 and 16 byte CDBs use different offsets to 3098 * provide the various register values. 3099 */ 3100 if (cdb[0] == ATA_16) { 3101 /* 3102 * 16-byte CDB - may contain extended commands. 3103 * 3104 * If that is the case, copy the upper byte register values. 3105 */ 3106 if (cdb[1] & 0x01) { 3107 tf->hob_feature = cdb[3]; 3108 tf->hob_nsect = cdb[5]; 3109 tf->hob_lbal = cdb[7]; 3110 tf->hob_lbam = cdb[9]; 3111 tf->hob_lbah = cdb[11]; 3112 tf->flags |= ATA_TFLAG_LBA48; 3113 } else 3114 tf->flags &= ~ATA_TFLAG_LBA48; 3115 3116 /* 3117 * Always copy low byte, device and command registers. 3118 */ 3119 tf->feature = cdb[4]; 3120 tf->nsect = cdb[6]; 3121 tf->lbal = cdb[8]; 3122 tf->lbam = cdb[10]; 3123 tf->lbah = cdb[12]; 3124 tf->device = cdb[13]; 3125 tf->command = cdb[14]; 3126 } else { 3127 /* 3128 * 12-byte CDB - incapable of extended commands. 3129 */ 3130 tf->flags &= ~ATA_TFLAG_LBA48; 3131 3132 tf->feature = cdb[3]; 3133 tf->nsect = cdb[4]; 3134 tf->lbal = cdb[5]; 3135 tf->lbam = cdb[6]; 3136 tf->lbah = cdb[7]; 3137 tf->device = cdb[8]; 3138 tf->command = cdb[9]; 3139 } 3140 3141 /* For NCQ commands copy the tag value */ 3142 if (ata_is_ncq(tf->protocol)) 3143 tf->nsect = qc->tag << 3; 3144 3145 /* enforce correct master/slave bit */ 3146 tf->device = dev->devno ? 3147 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3148 3149 switch (tf->command) { 3150 /* READ/WRITE LONG use a non-standard sect_size */ 3151 case ATA_CMD_READ_LONG: 3152 case ATA_CMD_READ_LONG_ONCE: 3153 case ATA_CMD_WRITE_LONG: 3154 case ATA_CMD_WRITE_LONG_ONCE: 3155 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3156 fp = 1; 3157 goto invalid_fld; 3158 } 3159 qc->sect_size = scsi_bufflen(scmd); 3160 break; 3161 3162 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3163 case ATA_CMD_CFA_WRITE_NE: 3164 case ATA_CMD_CFA_TRANS_SECT: 3165 case ATA_CMD_CFA_WRITE_MULT_NE: 3166 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3167 case ATA_CMD_READ: 3168 case ATA_CMD_READ_EXT: 3169 case ATA_CMD_READ_QUEUED: 3170 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3171 case ATA_CMD_FPDMA_READ: 3172 case ATA_CMD_READ_MULTI: 3173 case ATA_CMD_READ_MULTI_EXT: 3174 case ATA_CMD_PIO_READ: 3175 case ATA_CMD_PIO_READ_EXT: 3176 case ATA_CMD_READ_STREAM_DMA_EXT: 3177 case ATA_CMD_READ_STREAM_EXT: 3178 case ATA_CMD_VERIFY: 3179 case ATA_CMD_VERIFY_EXT: 3180 case ATA_CMD_WRITE: 3181 case ATA_CMD_WRITE_EXT: 3182 case ATA_CMD_WRITE_FUA_EXT: 3183 case ATA_CMD_WRITE_QUEUED: 3184 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3185 case ATA_CMD_FPDMA_WRITE: 3186 case ATA_CMD_WRITE_MULTI: 3187 case ATA_CMD_WRITE_MULTI_EXT: 3188 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3189 case ATA_CMD_PIO_WRITE: 3190 case ATA_CMD_PIO_WRITE_EXT: 3191 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3192 case ATA_CMD_WRITE_STREAM_EXT: 3193 qc->sect_size = scmd->device->sector_size; 3194 break; 3195 3196 /* Everything else uses 512 byte "sectors" */ 3197 default: 3198 qc->sect_size = ATA_SECT_SIZE; 3199 } 3200 3201 /* 3202 * Set flags so that all registers will be written, pass on 3203 * write indication (used for PIO/DMA setup), result TF is 3204 * copied back and we don't whine too much about its failure. 3205 */ 3206 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3207 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3208 tf->flags |= ATA_TFLAG_WRITE; 3209 3210 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3211 3212 /* 3213 * Set transfer length. 3214 * 3215 * TODO: find out if we need to do more here to 3216 * cover scatter/gather case. 3217 */ 3218 ata_qc_set_pc_nbytes(qc); 3219 3220 /* We may not issue DMA commands if no DMA mode is set */ 3221 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3222 fp = 1; 3223 goto invalid_fld; 3224 } 3225 3226 /* sanity check for pio multi commands */ 3227 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3228 fp = 1; 3229 goto invalid_fld; 3230 } 3231 3232 if (is_multi_taskfile(tf)) { 3233 unsigned int multi_count = 1 << (cdb[1] >> 5); 3234 3235 /* compare the passed through multi_count 3236 * with the cached multi_count of libata 3237 */ 3238 if (multi_count != dev->multi_count) 3239 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3240 multi_count); 3241 } 3242 3243 /* 3244 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3245 * SET_FEATURES - XFER MODE must be preceded/succeeded 3246 * by an update to hardware-specific registers for each 3247 * controller (i.e. the reason for ->set_piomode(), 3248 * ->set_dmamode(), and ->post_set_mode() hooks). 3249 */ 3250 if (tf->command == ATA_CMD_SET_FEATURES && 3251 tf->feature == SETFEATURES_XFER) { 3252 fp = (cdb[0] == ATA_16) ? 4 : 3; 3253 goto invalid_fld; 3254 } 3255 3256 /* 3257 * Filter TPM commands by default. These provide an 3258 * essentially uncontrolled encrypted "back door" between 3259 * applications and the disk. Set libata.allow_tpm=1 if you 3260 * have a real reason for wanting to use them. This ensures 3261 * that installed software cannot easily mess stuff up without 3262 * user intent. DVR type users will probably ship with this enabled 3263 * for movie content management. 3264 * 3265 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3266 * for this and should do in future but that it is not sufficient as 3267 * DCS is an optional feature set. Thus we also do the software filter 3268 * so that we comply with the TC consortium stated goal that the user 3269 * can turn off TC features of their system. 3270 */ 3271 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3272 fp = (cdb[0] == ATA_16) ? 14 : 9; 3273 goto invalid_fld; 3274 } 3275 3276 return 0; 3277 3278 invalid_fld: 3279 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3280 return 1; 3281 } 3282 3283 /** 3284 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3285 * @cmd: SCSI command being translated 3286 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3287 * @sector: Starting sector 3288 * @count: Total Range of request in logical sectors 3289 * 3290 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3291 * descriptor. 3292 * 3293 * Upto 64 entries of the format: 3294 * 63:48 Range Length 3295 * 47:0 LBA 3296 * 3297 * Range Length of 0 is ignored. 3298 * LBA's should be sorted order and not overlap. 3299 * 3300 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3301 * 3302 * Return: Number of bytes copied into sglist. 3303 */ 3304 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3305 u64 sector, u32 count) 3306 { 3307 struct scsi_device *sdp = cmd->device; 3308 size_t len = sdp->sector_size; 3309 size_t r; 3310 __le64 *buf; 3311 u32 i = 0; 3312 unsigned long flags; 3313 3314 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3315 3316 if (len > ATA_SCSI_RBUF_SIZE) 3317 len = ATA_SCSI_RBUF_SIZE; 3318 3319 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3320 buf = ((void *)ata_scsi_rbuf); 3321 memset(buf, 0, len); 3322 while (i < trmax) { 3323 u64 entry = sector | 3324 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3325 buf[i++] = __cpu_to_le64(entry); 3326 if (count <= 0xffff) 3327 break; 3328 count -= 0xffff; 3329 sector += 0xffff; 3330 } 3331 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3332 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3333 3334 return r; 3335 } 3336 3337 /** 3338 * ata_format_dsm_trim_descr() - SATL Write Same to ATA SCT Write Same 3339 * @cmd: SCSI command being translated 3340 * @lba: Starting sector 3341 * @num: Number of sectors to be zero'd. 3342 * 3343 * Rewrite the WRITE SAME payload to be an SCT Write Same formatted 3344 * descriptor. 3345 * NOTE: Writes a pattern (0's) in the foreground. 3346 * 3347 * Return: Number of bytes copied into sglist. 3348 */ 3349 static size_t ata_format_sct_write_same(struct scsi_cmnd *cmd, u64 lba, u64 num) 3350 { 3351 struct scsi_device *sdp = cmd->device; 3352 size_t len = sdp->sector_size; 3353 size_t r; 3354 u16 *buf; 3355 unsigned long flags; 3356 3357 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3358 buf = ((void *)ata_scsi_rbuf); 3359 3360 put_unaligned_le16(0x0002, &buf[0]); /* SCT_ACT_WRITE_SAME */ 3361 put_unaligned_le16(0x0101, &buf[1]); /* WRITE PTRN FG */ 3362 put_unaligned_le64(lba, &buf[2]); 3363 put_unaligned_le64(num, &buf[6]); 3364 put_unaligned_le32(0u, &buf[10]); /* pattern */ 3365 3366 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3367 3368 if (len > ATA_SCSI_RBUF_SIZE) 3369 len = ATA_SCSI_RBUF_SIZE; 3370 3371 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3372 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3373 3374 return r; 3375 } 3376 3377 /** 3378 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3379 * @qc: Command to be translated 3380 * 3381 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3382 * an SCT Write Same command. 3383 * Based on WRITE SAME has the UNMAP flag 3384 * When set translate to DSM TRIM 3385 * When clear translate to SCT Write Same 3386 */ 3387 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3388 { 3389 struct ata_taskfile *tf = &qc->tf; 3390 struct scsi_cmnd *scmd = qc->scsicmd; 3391 struct scsi_device *sdp = scmd->device; 3392 size_t len = sdp->sector_size; 3393 struct ata_device *dev = qc->dev; 3394 const u8 *cdb = scmd->cmnd; 3395 u64 block; 3396 u32 n_block; 3397 const u32 trmax = len >> 3; 3398 u32 size; 3399 u16 fp; 3400 u8 bp = 0xff; 3401 u8 unmap = cdb[1] & 0x8; 3402 3403 /* we may not issue DMA commands if no DMA mode is set */ 3404 if (unlikely(!dev->dma_mode)) 3405 goto invalid_opcode; 3406 3407 if (unlikely(scmd->cmd_len < 16)) { 3408 fp = 15; 3409 goto invalid_fld; 3410 } 3411 scsi_16_lba_len(cdb, &block, &n_block); 3412 3413 if (unmap) { 3414 /* If trim is not enabled the cmd is invalid. */ 3415 if ((dev->horkage & ATA_HORKAGE_NOTRIM) || 3416 !ata_id_has_trim(dev->id)) { 3417 fp = 1; 3418 bp = 3; 3419 goto invalid_fld; 3420 } 3421 /* If the request is too large the cmd is invalid */ 3422 if (n_block > 0xffff * trmax) { 3423 fp = 2; 3424 goto invalid_fld; 3425 } 3426 } else { 3427 /* If write same is not available the cmd is invalid */ 3428 if (!ata_id_sct_write_same(dev->id)) { 3429 fp = 1; 3430 bp = 3; 3431 goto invalid_fld; 3432 } 3433 } 3434 3435 /* 3436 * WRITE SAME always has a sector sized buffer as payload, this 3437 * should never be a multiple entry S/G list. 3438 */ 3439 if (!scsi_sg_count(scmd)) 3440 goto invalid_param_len; 3441 3442 /* 3443 * size must match sector size in bytes 3444 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3445 * is defined as number of 512 byte blocks to be transferred. 3446 */ 3447 if (unmap) { 3448 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3449 if (size != len) 3450 goto invalid_param_len; 3451 3452 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3453 /* Newer devices support queued TRIM commands */ 3454 tf->protocol = ATA_PROT_NCQ; 3455 tf->command = ATA_CMD_FPDMA_SEND; 3456 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3457 tf->nsect = qc->tag << 3; 3458 tf->hob_feature = (size / 512) >> 8; 3459 tf->feature = size / 512; 3460 3461 tf->auxiliary = 1; 3462 } else { 3463 tf->protocol = ATA_PROT_DMA; 3464 tf->hob_feature = 0; 3465 tf->feature = ATA_DSM_TRIM; 3466 tf->hob_nsect = (size / 512) >> 8; 3467 tf->nsect = size / 512; 3468 tf->command = ATA_CMD_DSM; 3469 } 3470 } else { 3471 size = ata_format_sct_write_same(scmd, block, n_block); 3472 if (size != len) 3473 goto invalid_param_len; 3474 3475 tf->hob_feature = 0; 3476 tf->feature = 0; 3477 tf->hob_nsect = 0; 3478 tf->nsect = 1; 3479 tf->lbah = 0; 3480 tf->lbam = 0; 3481 tf->lbal = ATA_CMD_STANDBYNOW1; 3482 tf->hob_lbah = 0; 3483 tf->hob_lbam = 0; 3484 tf->hob_lbal = 0; 3485 tf->device = ATA_CMD_STANDBYNOW1; 3486 tf->protocol = ATA_PROT_DMA; 3487 tf->command = ATA_CMD_WRITE_LOG_DMA_EXT; 3488 if (unlikely(dev->flags & ATA_DFLAG_PIO)) 3489 tf->command = ATA_CMD_WRITE_LOG_EXT; 3490 } 3491 3492 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3493 ATA_TFLAG_WRITE; 3494 3495 ata_qc_set_pc_nbytes(qc); 3496 3497 return 0; 3498 3499 invalid_fld: 3500 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3501 return 1; 3502 invalid_param_len: 3503 /* "Parameter list length error" */ 3504 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3505 return 1; 3506 invalid_opcode: 3507 /* "Invalid command operation code" */ 3508 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3509 return 1; 3510 } 3511 3512 /** 3513 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3514 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3515 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3516 * 3517 * Yields a subset to satisfy scsi_report_opcode() 3518 * 3519 * LOCKING: 3520 * spin_lock_irqsave(host lock) 3521 */ 3522 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3523 { 3524 struct ata_device *dev = args->dev; 3525 u8 *cdb = args->cmd->cmnd; 3526 u8 supported = 0; 3527 unsigned int err = 0; 3528 3529 if (cdb[2] != 1) { 3530 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3531 err = 2; 3532 goto out; 3533 } 3534 switch (cdb[3]) { 3535 case INQUIRY: 3536 case MODE_SENSE: 3537 case MODE_SENSE_10: 3538 case READ_CAPACITY: 3539 case SERVICE_ACTION_IN_16: 3540 case REPORT_LUNS: 3541 case REQUEST_SENSE: 3542 case SYNCHRONIZE_CACHE: 3543 case REZERO_UNIT: 3544 case SEEK_6: 3545 case SEEK_10: 3546 case TEST_UNIT_READY: 3547 case SEND_DIAGNOSTIC: 3548 case MAINTENANCE_IN: 3549 case READ_6: 3550 case READ_10: 3551 case READ_16: 3552 case WRITE_6: 3553 case WRITE_10: 3554 case WRITE_16: 3555 case ATA_12: 3556 case ATA_16: 3557 case VERIFY: 3558 case VERIFY_16: 3559 case MODE_SELECT: 3560 case MODE_SELECT_10: 3561 case START_STOP: 3562 supported = 3; 3563 break; 3564 case WRITE_SAME_16: 3565 if (!ata_id_sct_write_same(dev->id)) 3566 break; 3567 /* fallthrough: if SCT ... only enable for ZBC */ 3568 case ZBC_IN: 3569 case ZBC_OUT: 3570 if (ata_id_zoned_cap(dev->id) || 3571 dev->class == ATA_DEV_ZAC) 3572 supported = 3; 3573 break; 3574 default: 3575 break; 3576 } 3577 out: 3578 rbuf[1] = supported; /* supported */ 3579 return err; 3580 } 3581 3582 /** 3583 * ata_scsi_report_zones_complete - convert ATA output 3584 * @qc: command structure returning the data 3585 * 3586 * Convert T-13 little-endian field representation into 3587 * T-10 big-endian field representation. 3588 * What a mess. 3589 */ 3590 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3591 { 3592 struct scsi_cmnd *scmd = qc->scsicmd; 3593 struct sg_mapping_iter miter; 3594 unsigned long flags; 3595 unsigned int bytes = 0; 3596 3597 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3598 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3599 3600 local_irq_save(flags); 3601 while (sg_miter_next(&miter)) { 3602 unsigned int offset = 0; 3603 3604 if (bytes == 0) { 3605 char *hdr; 3606 u32 list_length; 3607 u64 max_lba, opt_lba; 3608 u16 same; 3609 3610 /* Swizzle header */ 3611 hdr = miter.addr; 3612 list_length = get_unaligned_le32(&hdr[0]); 3613 same = get_unaligned_le16(&hdr[4]); 3614 max_lba = get_unaligned_le64(&hdr[8]); 3615 opt_lba = get_unaligned_le64(&hdr[16]); 3616 put_unaligned_be32(list_length, &hdr[0]); 3617 hdr[4] = same & 0xf; 3618 put_unaligned_be64(max_lba, &hdr[8]); 3619 put_unaligned_be64(opt_lba, &hdr[16]); 3620 offset += 64; 3621 bytes += 64; 3622 } 3623 while (offset < miter.length) { 3624 char *rec; 3625 u8 cond, type, non_seq, reset; 3626 u64 size, start, wp; 3627 3628 /* Swizzle zone descriptor */ 3629 rec = miter.addr + offset; 3630 type = rec[0] & 0xf; 3631 cond = (rec[1] >> 4) & 0xf; 3632 non_seq = (rec[1] & 2); 3633 reset = (rec[1] & 1); 3634 size = get_unaligned_le64(&rec[8]); 3635 start = get_unaligned_le64(&rec[16]); 3636 wp = get_unaligned_le64(&rec[24]); 3637 rec[0] = type; 3638 rec[1] = (cond << 4) | non_seq | reset; 3639 put_unaligned_be64(size, &rec[8]); 3640 put_unaligned_be64(start, &rec[16]); 3641 put_unaligned_be64(wp, &rec[24]); 3642 WARN_ON(offset + 64 > miter.length); 3643 offset += 64; 3644 bytes += 64; 3645 } 3646 } 3647 sg_miter_stop(&miter); 3648 local_irq_restore(flags); 3649 3650 ata_scsi_qc_complete(qc); 3651 } 3652 3653 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3654 { 3655 struct ata_taskfile *tf = &qc->tf; 3656 struct scsi_cmnd *scmd = qc->scsicmd; 3657 const u8 *cdb = scmd->cmnd; 3658 u16 sect, fp = (u16)-1; 3659 u8 sa, options, bp = 0xff; 3660 u64 block; 3661 u32 n_block; 3662 3663 if (unlikely(scmd->cmd_len < 16)) { 3664 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3665 scmd->cmd_len); 3666 fp = 15; 3667 goto invalid_fld; 3668 } 3669 scsi_16_lba_len(cdb, &block, &n_block); 3670 if (n_block != scsi_bufflen(scmd)) { 3671 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3672 n_block, scsi_bufflen(scmd)); 3673 goto invalid_param_len; 3674 } 3675 sa = cdb[1] & 0x1f; 3676 if (sa != ZI_REPORT_ZONES) { 3677 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3678 fp = 1; 3679 goto invalid_fld; 3680 } 3681 /* 3682 * ZAC allows only for transfers in 512 byte blocks, 3683 * and uses a 16 bit value for the transfer count. 3684 */ 3685 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3686 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3687 goto invalid_param_len; 3688 } 3689 sect = n_block / 512; 3690 options = cdb[14] & 0xbf; 3691 3692 if (ata_ncq_enabled(qc->dev) && 3693 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3694 tf->protocol = ATA_PROT_NCQ; 3695 tf->command = ATA_CMD_FPDMA_RECV; 3696 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3697 tf->nsect = qc->tag << 3; 3698 tf->feature = sect & 0xff; 3699 tf->hob_feature = (sect >> 8) & 0xff; 3700 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3701 } else { 3702 tf->command = ATA_CMD_ZAC_MGMT_IN; 3703 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3704 tf->protocol = ATA_PROT_DMA; 3705 tf->hob_feature = options; 3706 tf->hob_nsect = (sect >> 8) & 0xff; 3707 tf->nsect = sect & 0xff; 3708 } 3709 tf->device = ATA_LBA; 3710 tf->lbah = (block >> 16) & 0xff; 3711 tf->lbam = (block >> 8) & 0xff; 3712 tf->lbal = block & 0xff; 3713 tf->hob_lbah = (block >> 40) & 0xff; 3714 tf->hob_lbam = (block >> 32) & 0xff; 3715 tf->hob_lbal = (block >> 24) & 0xff; 3716 3717 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3718 qc->flags |= ATA_QCFLAG_RESULT_TF; 3719 3720 ata_qc_set_pc_nbytes(qc); 3721 3722 qc->complete_fn = ata_scsi_report_zones_complete; 3723 3724 return 0; 3725 3726 invalid_fld: 3727 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3728 return 1; 3729 3730 invalid_param_len: 3731 /* "Parameter list length error" */ 3732 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3733 return 1; 3734 } 3735 3736 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3737 { 3738 struct ata_taskfile *tf = &qc->tf; 3739 struct scsi_cmnd *scmd = qc->scsicmd; 3740 struct ata_device *dev = qc->dev; 3741 const u8 *cdb = scmd->cmnd; 3742 u8 all, sa; 3743 u64 block; 3744 u32 n_block; 3745 u16 fp = (u16)-1; 3746 3747 if (unlikely(scmd->cmd_len < 16)) { 3748 fp = 15; 3749 goto invalid_fld; 3750 } 3751 3752 sa = cdb[1] & 0x1f; 3753 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3754 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3755 fp = 1; 3756 goto invalid_fld; 3757 } 3758 3759 scsi_16_lba_len(cdb, &block, &n_block); 3760 if (n_block) { 3761 /* 3762 * ZAC MANAGEMENT OUT doesn't define any length 3763 */ 3764 goto invalid_param_len; 3765 } 3766 if (block > dev->n_sectors) 3767 goto out_of_range; 3768 3769 all = cdb[14] & 0x1; 3770 3771 if (ata_ncq_enabled(qc->dev) && 3772 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3773 tf->protocol = ATA_PROT_NCQ_NODATA; 3774 tf->command = ATA_CMD_NCQ_NON_DATA; 3775 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3776 tf->nsect = qc->tag << 3; 3777 tf->auxiliary = sa | ((u16)all << 8); 3778 } else { 3779 tf->protocol = ATA_PROT_NODATA; 3780 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3781 tf->feature = sa; 3782 tf->hob_feature = all; 3783 } 3784 tf->lbah = (block >> 16) & 0xff; 3785 tf->lbam = (block >> 8) & 0xff; 3786 tf->lbal = block & 0xff; 3787 tf->hob_lbah = (block >> 40) & 0xff; 3788 tf->hob_lbam = (block >> 32) & 0xff; 3789 tf->hob_lbal = (block >> 24) & 0xff; 3790 tf->device = ATA_LBA; 3791 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3792 3793 return 0; 3794 3795 invalid_fld: 3796 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3797 return 1; 3798 out_of_range: 3799 /* "Logical Block Address out of range" */ 3800 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00); 3801 return 1; 3802 invalid_param_len: 3803 /* "Parameter list length error" */ 3804 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3805 return 1; 3806 } 3807 3808 /** 3809 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3810 * @qc: Storage for translated ATA taskfile 3811 * @buf: input buffer 3812 * @len: number of valid bytes in the input buffer 3813 * @fp: out parameter for the failed field on error 3814 * 3815 * Prepare a taskfile to modify caching information for the device. 3816 * 3817 * LOCKING: 3818 * None. 3819 */ 3820 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3821 const u8 *buf, int len, u16 *fp) 3822 { 3823 struct ata_taskfile *tf = &qc->tf; 3824 struct ata_device *dev = qc->dev; 3825 u8 mpage[CACHE_MPAGE_LEN]; 3826 u8 wce; 3827 int i; 3828 3829 /* 3830 * The first two bytes of def_cache_mpage are a header, so offsets 3831 * in mpage are off by 2 compared to buf. Same for len. 3832 */ 3833 3834 if (len != CACHE_MPAGE_LEN - 2) { 3835 if (len < CACHE_MPAGE_LEN - 2) 3836 *fp = len; 3837 else 3838 *fp = CACHE_MPAGE_LEN - 2; 3839 return -EINVAL; 3840 } 3841 3842 wce = buf[0] & (1 << 2); 3843 3844 /* 3845 * Check that read-only bits are not modified. 3846 */ 3847 ata_msense_caching(dev->id, mpage, false); 3848 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3849 if (i == 0) 3850 continue; 3851 if (mpage[i + 2] != buf[i]) { 3852 *fp = i; 3853 return -EINVAL; 3854 } 3855 } 3856 3857 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3858 tf->protocol = ATA_PROT_NODATA; 3859 tf->nsect = 0; 3860 tf->command = ATA_CMD_SET_FEATURES; 3861 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3862 return 0; 3863 } 3864 3865 /** 3866 * ata_mselect_control - Simulate MODE SELECT for control page 3867 * @qc: Storage for translated ATA taskfile 3868 * @buf: input buffer 3869 * @len: number of valid bytes in the input buffer 3870 * @fp: out parameter for the failed field on error 3871 * 3872 * Prepare a taskfile to modify caching information for the device. 3873 * 3874 * LOCKING: 3875 * None. 3876 */ 3877 static int ata_mselect_control(struct ata_queued_cmd *qc, 3878 const u8 *buf, int len, u16 *fp) 3879 { 3880 struct ata_device *dev = qc->dev; 3881 u8 mpage[CONTROL_MPAGE_LEN]; 3882 u8 d_sense; 3883 int i; 3884 3885 /* 3886 * The first two bytes of def_control_mpage are a header, so offsets 3887 * in mpage are off by 2 compared to buf. Same for len. 3888 */ 3889 3890 if (len != CONTROL_MPAGE_LEN - 2) { 3891 if (len < CONTROL_MPAGE_LEN - 2) 3892 *fp = len; 3893 else 3894 *fp = CONTROL_MPAGE_LEN - 2; 3895 return -EINVAL; 3896 } 3897 3898 d_sense = buf[0] & (1 << 2); 3899 3900 /* 3901 * Check that read-only bits are not modified. 3902 */ 3903 ata_msense_control(dev, mpage, false); 3904 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3905 if (i == 0) 3906 continue; 3907 if (mpage[2 + i] != buf[i]) { 3908 *fp = i; 3909 return -EINVAL; 3910 } 3911 } 3912 if (d_sense & (1 << 2)) 3913 dev->flags |= ATA_DFLAG_D_SENSE; 3914 else 3915 dev->flags &= ~ATA_DFLAG_D_SENSE; 3916 return 0; 3917 } 3918 3919 /** 3920 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands 3921 * @qc: Storage for translated ATA taskfile 3922 * 3923 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3924 * Assume this is invoked for direct access devices (e.g. disks) only. 3925 * There should be no block descriptor for other device types. 3926 * 3927 * LOCKING: 3928 * spin_lock_irqsave(host lock) 3929 */ 3930 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3931 { 3932 struct scsi_cmnd *scmd = qc->scsicmd; 3933 const u8 *cdb = scmd->cmnd; 3934 const u8 *p; 3935 u8 pg, spg; 3936 unsigned six_byte, pg_len, hdr_len, bd_len; 3937 int len; 3938 u16 fp = (u16)-1; 3939 u8 bp = 0xff; 3940 3941 VPRINTK("ENTER\n"); 3942 3943 six_byte = (cdb[0] == MODE_SELECT); 3944 if (six_byte) { 3945 if (scmd->cmd_len < 5) { 3946 fp = 4; 3947 goto invalid_fld; 3948 } 3949 3950 len = cdb[4]; 3951 hdr_len = 4; 3952 } else { 3953 if (scmd->cmd_len < 9) { 3954 fp = 8; 3955 goto invalid_fld; 3956 } 3957 3958 len = (cdb[7] << 8) + cdb[8]; 3959 hdr_len = 8; 3960 } 3961 3962 /* We only support PF=1, SP=0. */ 3963 if ((cdb[1] & 0x11) != 0x10) { 3964 fp = 1; 3965 bp = (cdb[1] & 0x01) ? 1 : 5; 3966 goto invalid_fld; 3967 } 3968 3969 /* Test early for possible overrun. */ 3970 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3971 goto invalid_param_len; 3972 3973 p = page_address(sg_page(scsi_sglist(scmd))); 3974 3975 /* Move past header and block descriptors. */ 3976 if (len < hdr_len) 3977 goto invalid_param_len; 3978 3979 if (six_byte) 3980 bd_len = p[3]; 3981 else 3982 bd_len = (p[6] << 8) + p[7]; 3983 3984 len -= hdr_len; 3985 p += hdr_len; 3986 if (len < bd_len) 3987 goto invalid_param_len; 3988 if (bd_len != 0 && bd_len != 8) { 3989 fp = (six_byte) ? 3 : 6; 3990 fp += bd_len + hdr_len; 3991 goto invalid_param; 3992 } 3993 3994 len -= bd_len; 3995 p += bd_len; 3996 if (len == 0) 3997 goto skip; 3998 3999 /* Parse both possible formats for the mode page headers. */ 4000 pg = p[0] & 0x3f; 4001 if (p[0] & 0x40) { 4002 if (len < 4) 4003 goto invalid_param_len; 4004 4005 spg = p[1]; 4006 pg_len = (p[2] << 8) | p[3]; 4007 p += 4; 4008 len -= 4; 4009 } else { 4010 if (len < 2) 4011 goto invalid_param_len; 4012 4013 spg = 0; 4014 pg_len = p[1]; 4015 p += 2; 4016 len -= 2; 4017 } 4018 4019 /* 4020 * No mode subpages supported (yet) but asking for _all_ 4021 * subpages may be valid 4022 */ 4023 if (spg && (spg != ALL_SUB_MPAGES)) { 4024 fp = (p[0] & 0x40) ? 1 : 0; 4025 fp += hdr_len + bd_len; 4026 goto invalid_param; 4027 } 4028 if (pg_len > len) 4029 goto invalid_param_len; 4030 4031 switch (pg) { 4032 case CACHE_MPAGE: 4033 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4034 fp += hdr_len + bd_len; 4035 goto invalid_param; 4036 } 4037 break; 4038 case CONTROL_MPAGE: 4039 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 4040 fp += hdr_len + bd_len; 4041 goto invalid_param; 4042 } else { 4043 goto skip; /* No ATA command to send */ 4044 } 4045 break; 4046 default: /* invalid page code */ 4047 fp = bd_len + hdr_len; 4048 goto invalid_param; 4049 } 4050 4051 /* 4052 * Only one page has changeable data, so we only support setting one 4053 * page at a time. 4054 */ 4055 if (len > pg_len) 4056 goto invalid_param; 4057 4058 return 0; 4059 4060 invalid_fld: 4061 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4062 return 1; 4063 4064 invalid_param: 4065 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4066 return 1; 4067 4068 invalid_param_len: 4069 /* "Parameter list length error" */ 4070 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4071 return 1; 4072 4073 skip: 4074 scmd->result = SAM_STAT_GOOD; 4075 return 1; 4076 } 4077 4078 /** 4079 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4080 * @dev: ATA device 4081 * @cmd: SCSI command opcode to consider 4082 * 4083 * Look up the SCSI command given, and determine whether the 4084 * SCSI command is to be translated or simulated. 4085 * 4086 * RETURNS: 4087 * Pointer to translation function if possible, %NULL if not. 4088 */ 4089 4090 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4091 { 4092 switch (cmd) { 4093 case READ_6: 4094 case READ_10: 4095 case READ_16: 4096 4097 case WRITE_6: 4098 case WRITE_10: 4099 case WRITE_16: 4100 return ata_scsi_rw_xlat; 4101 4102 case WRITE_SAME_16: 4103 return ata_scsi_write_same_xlat; 4104 4105 case SYNCHRONIZE_CACHE: 4106 if (ata_try_flush_cache(dev)) 4107 return ata_scsi_flush_xlat; 4108 break; 4109 4110 case VERIFY: 4111 case VERIFY_16: 4112 return ata_scsi_verify_xlat; 4113 4114 case ATA_12: 4115 case ATA_16: 4116 return ata_scsi_pass_thru; 4117 4118 case MODE_SELECT: 4119 case MODE_SELECT_10: 4120 return ata_scsi_mode_select_xlat; 4121 break; 4122 4123 case ZBC_IN: 4124 return ata_scsi_zbc_in_xlat; 4125 4126 case ZBC_OUT: 4127 return ata_scsi_zbc_out_xlat; 4128 4129 case START_STOP: 4130 return ata_scsi_start_stop_xlat; 4131 } 4132 4133 return NULL; 4134 } 4135 4136 /** 4137 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 4138 * @ap: ATA port to which the command was being sent 4139 * @cmd: SCSI command to dump 4140 * 4141 * Prints the contents of a SCSI command via printk(). 4142 */ 4143 4144 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 4145 struct scsi_cmnd *cmd) 4146 { 4147 #ifdef ATA_DEBUG 4148 struct scsi_device *scsidev = cmd->device; 4149 4150 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n", 4151 ap->print_id, 4152 scsidev->channel, scsidev->id, scsidev->lun, 4153 cmd->cmnd); 4154 #endif 4155 } 4156 4157 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 4158 struct ata_device *dev) 4159 { 4160 u8 scsi_op = scmd->cmnd[0]; 4161 ata_xlat_func_t xlat_func; 4162 int rc = 0; 4163 4164 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4165 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 4166 goto bad_cdb_len; 4167 4168 xlat_func = ata_get_xlat_func(dev, scsi_op); 4169 } else { 4170 if (unlikely(!scmd->cmd_len)) 4171 goto bad_cdb_len; 4172 4173 xlat_func = NULL; 4174 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4175 /* relay SCSI command to ATAPI device */ 4176 int len = COMMAND_SIZE(scsi_op); 4177 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 4178 goto bad_cdb_len; 4179 4180 xlat_func = atapi_xlat; 4181 } else { 4182 /* ATA_16 passthru, treat as an ATA command */ 4183 if (unlikely(scmd->cmd_len > 16)) 4184 goto bad_cdb_len; 4185 4186 xlat_func = ata_get_xlat_func(dev, scsi_op); 4187 } 4188 } 4189 4190 if (xlat_func) 4191 rc = ata_scsi_translate(dev, scmd, xlat_func); 4192 else 4193 ata_scsi_simulate(dev, scmd); 4194 4195 return rc; 4196 4197 bad_cdb_len: 4198 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4199 scmd->cmd_len, scsi_op, dev->cdb_len); 4200 scmd->result = DID_ERROR << 16; 4201 scmd->scsi_done(scmd); 4202 return 0; 4203 } 4204 4205 /** 4206 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4207 * @shost: SCSI host of command to be sent 4208 * @cmd: SCSI command to be sent 4209 * 4210 * In some cases, this function translates SCSI commands into 4211 * ATA taskfiles, and queues the taskfiles to be sent to 4212 * hardware. In other cases, this function simulates a 4213 * SCSI device by evaluating and responding to certain 4214 * SCSI commands. This creates the overall effect of 4215 * ATA and ATAPI devices appearing as SCSI devices. 4216 * 4217 * LOCKING: 4218 * ATA host lock 4219 * 4220 * RETURNS: 4221 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4222 * 0 otherwise. 4223 */ 4224 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4225 { 4226 struct ata_port *ap; 4227 struct ata_device *dev; 4228 struct scsi_device *scsidev = cmd->device; 4229 int rc = 0; 4230 unsigned long irq_flags; 4231 4232 ap = ata_shost_to_port(shost); 4233 4234 spin_lock_irqsave(ap->lock, irq_flags); 4235 4236 ata_scsi_dump_cdb(ap, cmd); 4237 4238 dev = ata_scsi_find_dev(ap, scsidev); 4239 if (likely(dev)) 4240 rc = __ata_scsi_queuecmd(cmd, dev); 4241 else { 4242 cmd->result = (DID_BAD_TARGET << 16); 4243 cmd->scsi_done(cmd); 4244 } 4245 4246 spin_unlock_irqrestore(ap->lock, irq_flags); 4247 4248 return rc; 4249 } 4250 4251 /** 4252 * ata_scsi_simulate - simulate SCSI command on ATA device 4253 * @dev: the target device 4254 * @cmd: SCSI command being sent to device. 4255 * 4256 * Interprets and directly executes a select list of SCSI commands 4257 * that can be handled internally. 4258 * 4259 * LOCKING: 4260 * spin_lock_irqsave(host lock) 4261 */ 4262 4263 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4264 { 4265 struct ata_scsi_args args; 4266 const u8 *scsicmd = cmd->cmnd; 4267 u8 tmp8; 4268 4269 args.dev = dev; 4270 args.id = dev->id; 4271 args.cmd = cmd; 4272 args.done = cmd->scsi_done; 4273 4274 switch(scsicmd[0]) { 4275 case INQUIRY: 4276 if (scsicmd[1] & 2) /* is CmdDt set? */ 4277 ata_scsi_invalid_field(dev, cmd, 1); 4278 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4279 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4280 else switch (scsicmd[2]) { 4281 case 0x00: 4282 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4283 break; 4284 case 0x80: 4285 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4286 break; 4287 case 0x83: 4288 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4289 break; 4290 case 0x89: 4291 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4292 break; 4293 case 0xb0: 4294 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4295 break; 4296 case 0xb1: 4297 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4298 break; 4299 case 0xb2: 4300 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4301 break; 4302 case 0xb6: 4303 if (dev->flags & ATA_DFLAG_ZAC) { 4304 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4305 break; 4306 } 4307 /* Fallthrough */ 4308 default: 4309 ata_scsi_invalid_field(dev, cmd, 2); 4310 break; 4311 } 4312 break; 4313 4314 case MODE_SENSE: 4315 case MODE_SENSE_10: 4316 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4317 break; 4318 4319 case READ_CAPACITY: 4320 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4321 break; 4322 4323 case SERVICE_ACTION_IN_16: 4324 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4325 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4326 else 4327 ata_scsi_invalid_field(dev, cmd, 1); 4328 break; 4329 4330 case REPORT_LUNS: 4331 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4332 break; 4333 4334 case REQUEST_SENSE: 4335 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4336 cmd->result = (DRIVER_SENSE << 24); 4337 cmd->scsi_done(cmd); 4338 break; 4339 4340 /* if we reach this, then writeback caching is disabled, 4341 * turning this into a no-op. 4342 */ 4343 case SYNCHRONIZE_CACHE: 4344 /* fall through */ 4345 4346 /* no-op's, complete with success */ 4347 case REZERO_UNIT: 4348 case SEEK_6: 4349 case SEEK_10: 4350 case TEST_UNIT_READY: 4351 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 4352 break; 4353 4354 case SEND_DIAGNOSTIC: 4355 tmp8 = scsicmd[1] & ~(1 << 3); 4356 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) 4357 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 4358 else 4359 ata_scsi_invalid_field(dev, cmd, 1); 4360 break; 4361 4362 case MAINTENANCE_IN: 4363 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4364 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4365 else 4366 ata_scsi_invalid_field(dev, cmd, 1); 4367 break; 4368 4369 /* all other commands */ 4370 default: 4371 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4372 /* "Invalid command operation code" */ 4373 cmd->scsi_done(cmd); 4374 break; 4375 } 4376 } 4377 4378 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4379 { 4380 int i, rc; 4381 4382 for (i = 0; i < host->n_ports; i++) { 4383 struct ata_port *ap = host->ports[i]; 4384 struct Scsi_Host *shost; 4385 4386 rc = -ENOMEM; 4387 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4388 if (!shost) 4389 goto err_alloc; 4390 4391 shost->eh_noresume = 1; 4392 *(struct ata_port **)&shost->hostdata[0] = ap; 4393 ap->scsi_host = shost; 4394 4395 shost->transportt = ata_scsi_transport_template; 4396 shost->unique_id = ap->print_id; 4397 shost->max_id = 16; 4398 shost->max_lun = 1; 4399 shost->max_channel = 1; 4400 shost->max_cmd_len = 16; 4401 4402 /* Schedule policy is determined by ->qc_defer() 4403 * callback and it needs to see every deferred qc. 4404 * Set host_blocked to 1 to prevent SCSI midlayer from 4405 * automatically deferring requests. 4406 */ 4407 shost->max_host_blocked = 1; 4408 4409 rc = scsi_add_host_with_dma(ap->scsi_host, 4410 &ap->tdev, ap->host->dev); 4411 if (rc) 4412 goto err_add; 4413 } 4414 4415 return 0; 4416 4417 err_add: 4418 scsi_host_put(host->ports[i]->scsi_host); 4419 err_alloc: 4420 while (--i >= 0) { 4421 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4422 4423 scsi_remove_host(shost); 4424 scsi_host_put(shost); 4425 } 4426 return rc; 4427 } 4428 4429 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4430 { 4431 int tries = 5; 4432 struct ata_device *last_failed_dev = NULL; 4433 struct ata_link *link; 4434 struct ata_device *dev; 4435 4436 repeat: 4437 ata_for_each_link(link, ap, EDGE) { 4438 ata_for_each_dev(dev, link, ENABLED) { 4439 struct scsi_device *sdev; 4440 int channel = 0, id = 0; 4441 4442 if (dev->sdev) 4443 continue; 4444 4445 if (ata_is_host_link(link)) 4446 id = dev->devno; 4447 else 4448 channel = link->pmp; 4449 4450 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4451 NULL); 4452 if (!IS_ERR(sdev)) { 4453 dev->sdev = sdev; 4454 scsi_device_put(sdev); 4455 } else { 4456 dev->sdev = NULL; 4457 } 4458 } 4459 } 4460 4461 /* If we scanned while EH was in progress or allocation 4462 * failure occurred, scan would have failed silently. Check 4463 * whether all devices are attached. 4464 */ 4465 ata_for_each_link(link, ap, EDGE) { 4466 ata_for_each_dev(dev, link, ENABLED) { 4467 if (!dev->sdev) 4468 goto exit_loop; 4469 } 4470 } 4471 exit_loop: 4472 if (!link) 4473 return; 4474 4475 /* we're missing some SCSI devices */ 4476 if (sync) { 4477 /* If caller requested synchrnous scan && we've made 4478 * any progress, sleep briefly and repeat. 4479 */ 4480 if (dev != last_failed_dev) { 4481 msleep(100); 4482 last_failed_dev = dev; 4483 goto repeat; 4484 } 4485 4486 /* We might be failing to detect boot device, give it 4487 * a few more chances. 4488 */ 4489 if (--tries) { 4490 msleep(100); 4491 goto repeat; 4492 } 4493 4494 ata_port_err(ap, 4495 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4496 } 4497 4498 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4499 round_jiffies_relative(HZ)); 4500 } 4501 4502 /** 4503 * ata_scsi_offline_dev - offline attached SCSI device 4504 * @dev: ATA device to offline attached SCSI device for 4505 * 4506 * This function is called from ata_eh_hotplug() and responsible 4507 * for taking the SCSI device attached to @dev offline. This 4508 * function is called with host lock which protects dev->sdev 4509 * against clearing. 4510 * 4511 * LOCKING: 4512 * spin_lock_irqsave(host lock) 4513 * 4514 * RETURNS: 4515 * 1 if attached SCSI device exists, 0 otherwise. 4516 */ 4517 int ata_scsi_offline_dev(struct ata_device *dev) 4518 { 4519 if (dev->sdev) { 4520 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4521 return 1; 4522 } 4523 return 0; 4524 } 4525 4526 /** 4527 * ata_scsi_remove_dev - remove attached SCSI device 4528 * @dev: ATA device to remove attached SCSI device for 4529 * 4530 * This function is called from ata_eh_scsi_hotplug() and 4531 * responsible for removing the SCSI device attached to @dev. 4532 * 4533 * LOCKING: 4534 * Kernel thread context (may sleep). 4535 */ 4536 static void ata_scsi_remove_dev(struct ata_device *dev) 4537 { 4538 struct ata_port *ap = dev->link->ap; 4539 struct scsi_device *sdev; 4540 unsigned long flags; 4541 4542 /* Alas, we need to grab scan_mutex to ensure SCSI device 4543 * state doesn't change underneath us and thus 4544 * scsi_device_get() always succeeds. The mutex locking can 4545 * be removed if there is __scsi_device_get() interface which 4546 * increments reference counts regardless of device state. 4547 */ 4548 mutex_lock(&ap->scsi_host->scan_mutex); 4549 spin_lock_irqsave(ap->lock, flags); 4550 4551 /* clearing dev->sdev is protected by host lock */ 4552 sdev = dev->sdev; 4553 dev->sdev = NULL; 4554 4555 if (sdev) { 4556 /* If user initiated unplug races with us, sdev can go 4557 * away underneath us after the host lock and 4558 * scan_mutex are released. Hold onto it. 4559 */ 4560 if (scsi_device_get(sdev) == 0) { 4561 /* The following ensures the attached sdev is 4562 * offline on return from ata_scsi_offline_dev() 4563 * regardless it wins or loses the race 4564 * against this function. 4565 */ 4566 scsi_device_set_state(sdev, SDEV_OFFLINE); 4567 } else { 4568 WARN_ON(1); 4569 sdev = NULL; 4570 } 4571 } 4572 4573 spin_unlock_irqrestore(ap->lock, flags); 4574 mutex_unlock(&ap->scsi_host->scan_mutex); 4575 4576 if (sdev) { 4577 ata_dev_info(dev, "detaching (SCSI %s)\n", 4578 dev_name(&sdev->sdev_gendev)); 4579 4580 scsi_remove_device(sdev); 4581 scsi_device_put(sdev); 4582 } 4583 } 4584 4585 static void ata_scsi_handle_link_detach(struct ata_link *link) 4586 { 4587 struct ata_port *ap = link->ap; 4588 struct ata_device *dev; 4589 4590 ata_for_each_dev(dev, link, ALL) { 4591 unsigned long flags; 4592 4593 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4594 continue; 4595 4596 spin_lock_irqsave(ap->lock, flags); 4597 dev->flags &= ~ATA_DFLAG_DETACHED; 4598 spin_unlock_irqrestore(ap->lock, flags); 4599 4600 if (zpodd_dev_enabled(dev)) 4601 zpodd_exit(dev); 4602 4603 ata_scsi_remove_dev(dev); 4604 } 4605 } 4606 4607 /** 4608 * ata_scsi_media_change_notify - send media change event 4609 * @dev: Pointer to the disk device with media change event 4610 * 4611 * Tell the block layer to send a media change notification 4612 * event. 4613 * 4614 * LOCKING: 4615 * spin_lock_irqsave(host lock) 4616 */ 4617 void ata_scsi_media_change_notify(struct ata_device *dev) 4618 { 4619 if (dev->sdev) 4620 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4621 GFP_ATOMIC); 4622 } 4623 4624 /** 4625 * ata_scsi_hotplug - SCSI part of hotplug 4626 * @work: Pointer to ATA port to perform SCSI hotplug on 4627 * 4628 * Perform SCSI part of hotplug. It's executed from a separate 4629 * workqueue after EH completes. This is necessary because SCSI 4630 * hot plugging requires working EH and hot unplugging is 4631 * synchronized with hot plugging with a mutex. 4632 * 4633 * LOCKING: 4634 * Kernel thread context (may sleep). 4635 */ 4636 void ata_scsi_hotplug(struct work_struct *work) 4637 { 4638 struct ata_port *ap = 4639 container_of(work, struct ata_port, hotplug_task.work); 4640 int i; 4641 4642 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4643 DPRINTK("ENTER/EXIT - unloading\n"); 4644 return; 4645 } 4646 4647 /* 4648 * XXX - UGLY HACK 4649 * 4650 * The block layer suspend/resume path is fundamentally broken due 4651 * to freezable kthreads and workqueue and may deadlock if a block 4652 * device gets removed while resume is in progress. I don't know 4653 * what the solution is short of removing freezable kthreads and 4654 * workqueues altogether. 4655 * 4656 * The following is an ugly hack to avoid kicking off device 4657 * removal while freezer is active. This is a joke but does avoid 4658 * this particular deadlock scenario. 4659 * 4660 * https://bugzilla.kernel.org/show_bug.cgi?id=62801 4661 * http://marc.info/?l=linux-kernel&m=138695698516487 4662 */ 4663 #ifdef CONFIG_FREEZER 4664 while (pm_freezing) 4665 msleep(10); 4666 #endif 4667 4668 DPRINTK("ENTER\n"); 4669 mutex_lock(&ap->scsi_scan_mutex); 4670 4671 /* Unplug detached devices. We cannot use link iterator here 4672 * because PMP links have to be scanned even if PMP is 4673 * currently not attached. Iterate manually. 4674 */ 4675 ata_scsi_handle_link_detach(&ap->link); 4676 if (ap->pmp_link) 4677 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4678 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4679 4680 /* scan for new ones */ 4681 ata_scsi_scan_host(ap, 0); 4682 4683 mutex_unlock(&ap->scsi_scan_mutex); 4684 DPRINTK("EXIT\n"); 4685 } 4686 4687 /** 4688 * ata_scsi_user_scan - indication for user-initiated bus scan 4689 * @shost: SCSI host to scan 4690 * @channel: Channel to scan 4691 * @id: ID to scan 4692 * @lun: LUN to scan 4693 * 4694 * This function is called when user explicitly requests bus 4695 * scan. Set probe pending flag and invoke EH. 4696 * 4697 * LOCKING: 4698 * SCSI layer (we don't care) 4699 * 4700 * RETURNS: 4701 * Zero. 4702 */ 4703 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4704 unsigned int id, u64 lun) 4705 { 4706 struct ata_port *ap = ata_shost_to_port(shost); 4707 unsigned long flags; 4708 int devno, rc = 0; 4709 4710 if (!ap->ops->error_handler) 4711 return -EOPNOTSUPP; 4712 4713 if (lun != SCAN_WILD_CARD && lun) 4714 return -EINVAL; 4715 4716 if (!sata_pmp_attached(ap)) { 4717 if (channel != SCAN_WILD_CARD && channel) 4718 return -EINVAL; 4719 devno = id; 4720 } else { 4721 if (id != SCAN_WILD_CARD && id) 4722 return -EINVAL; 4723 devno = channel; 4724 } 4725 4726 spin_lock_irqsave(ap->lock, flags); 4727 4728 if (devno == SCAN_WILD_CARD) { 4729 struct ata_link *link; 4730 4731 ata_for_each_link(link, ap, EDGE) { 4732 struct ata_eh_info *ehi = &link->eh_info; 4733 ehi->probe_mask |= ATA_ALL_DEVICES; 4734 ehi->action |= ATA_EH_RESET; 4735 } 4736 } else { 4737 struct ata_device *dev = ata_find_dev(ap, devno); 4738 4739 if (dev) { 4740 struct ata_eh_info *ehi = &dev->link->eh_info; 4741 ehi->probe_mask |= 1 << dev->devno; 4742 ehi->action |= ATA_EH_RESET; 4743 } else 4744 rc = -EINVAL; 4745 } 4746 4747 if (rc == 0) { 4748 ata_port_schedule_eh(ap); 4749 spin_unlock_irqrestore(ap->lock, flags); 4750 ata_port_wait_eh(ap); 4751 } else 4752 spin_unlock_irqrestore(ap->lock, flags); 4753 4754 return rc; 4755 } 4756 4757 /** 4758 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4759 * @work: Pointer to ATA port to perform scsi_rescan_device() 4760 * 4761 * After ATA pass thru (SAT) commands are executed successfully, 4762 * libata need to propagate the changes to SCSI layer. 4763 * 4764 * LOCKING: 4765 * Kernel thread context (may sleep). 4766 */ 4767 void ata_scsi_dev_rescan(struct work_struct *work) 4768 { 4769 struct ata_port *ap = 4770 container_of(work, struct ata_port, scsi_rescan_task); 4771 struct ata_link *link; 4772 struct ata_device *dev; 4773 unsigned long flags; 4774 4775 mutex_lock(&ap->scsi_scan_mutex); 4776 spin_lock_irqsave(ap->lock, flags); 4777 4778 ata_for_each_link(link, ap, EDGE) { 4779 ata_for_each_dev(dev, link, ENABLED) { 4780 struct scsi_device *sdev = dev->sdev; 4781 4782 if (!sdev) 4783 continue; 4784 if (scsi_device_get(sdev)) 4785 continue; 4786 4787 spin_unlock_irqrestore(ap->lock, flags); 4788 scsi_rescan_device(&(sdev->sdev_gendev)); 4789 scsi_device_put(sdev); 4790 spin_lock_irqsave(ap->lock, flags); 4791 } 4792 } 4793 4794 spin_unlock_irqrestore(ap->lock, flags); 4795 mutex_unlock(&ap->scsi_scan_mutex); 4796 } 4797 4798 /** 4799 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 4800 * @host: ATA host container for all SAS ports 4801 * @port_info: Information from low-level host driver 4802 * @shost: SCSI host that the scsi device is attached to 4803 * 4804 * LOCKING: 4805 * PCI/etc. bus probe sem. 4806 * 4807 * RETURNS: 4808 * ata_port pointer on success / NULL on failure. 4809 */ 4810 4811 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 4812 struct ata_port_info *port_info, 4813 struct Scsi_Host *shost) 4814 { 4815 struct ata_port *ap; 4816 4817 ap = ata_port_alloc(host); 4818 if (!ap) 4819 return NULL; 4820 4821 ap->port_no = 0; 4822 ap->lock = &host->lock; 4823 ap->pio_mask = port_info->pio_mask; 4824 ap->mwdma_mask = port_info->mwdma_mask; 4825 ap->udma_mask = port_info->udma_mask; 4826 ap->flags |= port_info->flags; 4827 ap->ops = port_info->port_ops; 4828 ap->cbl = ATA_CBL_SATA; 4829 4830 return ap; 4831 } 4832 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 4833 4834 /** 4835 * ata_sas_port_start - Set port up for dma. 4836 * @ap: Port to initialize 4837 * 4838 * Called just after data structures for each port are 4839 * initialized. 4840 * 4841 * May be used as the port_start() entry in ata_port_operations. 4842 * 4843 * LOCKING: 4844 * Inherited from caller. 4845 */ 4846 int ata_sas_port_start(struct ata_port *ap) 4847 { 4848 /* 4849 * the port is marked as frozen at allocation time, but if we don't 4850 * have new eh, we won't thaw it 4851 */ 4852 if (!ap->ops->error_handler) 4853 ap->pflags &= ~ATA_PFLAG_FROZEN; 4854 return 0; 4855 } 4856 EXPORT_SYMBOL_GPL(ata_sas_port_start); 4857 4858 /** 4859 * ata_port_stop - Undo ata_sas_port_start() 4860 * @ap: Port to shut down 4861 * 4862 * May be used as the port_stop() entry in ata_port_operations. 4863 * 4864 * LOCKING: 4865 * Inherited from caller. 4866 */ 4867 4868 void ata_sas_port_stop(struct ata_port *ap) 4869 { 4870 } 4871 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 4872 4873 /** 4874 * ata_sas_async_probe - simply schedule probing and return 4875 * @ap: Port to probe 4876 * 4877 * For batch scheduling of probe for sas attached ata devices, assumes 4878 * the port has already been through ata_sas_port_init() 4879 */ 4880 void ata_sas_async_probe(struct ata_port *ap) 4881 { 4882 __ata_port_probe(ap); 4883 } 4884 EXPORT_SYMBOL_GPL(ata_sas_async_probe); 4885 4886 int ata_sas_sync_probe(struct ata_port *ap) 4887 { 4888 return ata_port_probe(ap); 4889 } 4890 EXPORT_SYMBOL_GPL(ata_sas_sync_probe); 4891 4892 4893 /** 4894 * ata_sas_port_init - Initialize a SATA device 4895 * @ap: SATA port to initialize 4896 * 4897 * LOCKING: 4898 * PCI/etc. bus probe sem. 4899 * 4900 * RETURNS: 4901 * Zero on success, non-zero on error. 4902 */ 4903 4904 int ata_sas_port_init(struct ata_port *ap) 4905 { 4906 int rc = ap->ops->port_start(ap); 4907 4908 if (rc) 4909 return rc; 4910 ap->print_id = atomic_inc_return(&ata_print_id); 4911 return 0; 4912 } 4913 EXPORT_SYMBOL_GPL(ata_sas_port_init); 4914 4915 /** 4916 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 4917 * @ap: SATA port to destroy 4918 * 4919 */ 4920 4921 void ata_sas_port_destroy(struct ata_port *ap) 4922 { 4923 if (ap->ops->port_stop) 4924 ap->ops->port_stop(ap); 4925 kfree(ap); 4926 } 4927 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 4928 4929 /** 4930 * ata_sas_slave_configure - Default slave_config routine for libata devices 4931 * @sdev: SCSI device to configure 4932 * @ap: ATA port to which SCSI device is attached 4933 * 4934 * RETURNS: 4935 * Zero. 4936 */ 4937 4938 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 4939 { 4940 ata_scsi_sdev_config(sdev); 4941 ata_scsi_dev_config(sdev, ap->link.device); 4942 return 0; 4943 } 4944 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 4945 4946 /** 4947 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 4948 * @cmd: SCSI command to be sent 4949 * @ap: ATA port to which the command is being sent 4950 * 4951 * RETURNS: 4952 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4953 * 0 otherwise. 4954 */ 4955 4956 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 4957 { 4958 int rc = 0; 4959 4960 ata_scsi_dump_cdb(ap, cmd); 4961 4962 if (likely(ata_dev_enabled(ap->link.device))) 4963 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 4964 else { 4965 cmd->result = (DID_BAD_TARGET << 16); 4966 cmd->scsi_done(cmd); 4967 } 4968 return rc; 4969 } 4970 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 4971 4972 int ata_sas_allocate_tag(struct ata_port *ap) 4973 { 4974 unsigned int max_queue = ap->host->n_tags; 4975 unsigned int i, tag; 4976 4977 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) { 4978 tag = tag < max_queue ? tag : 0; 4979 4980 /* the last tag is reserved for internal command. */ 4981 if (tag == ATA_TAG_INTERNAL) 4982 continue; 4983 4984 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) { 4985 ap->sas_last_tag = tag; 4986 return tag; 4987 } 4988 } 4989 return -1; 4990 } 4991 4992 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) 4993 { 4994 clear_bit(tag, &ap->sas_tag_allocated); 4995 } 4996