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[7] = 0; 1092 if (tf->flags & ATA_TFLAG_LBA48) { 1093 desc[8] |= 0x80; 1094 if (tf->hob_nsect) 1095 desc[8] |= 0x40; 1096 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) 1097 desc[8] |= 0x20; 1098 } 1099 desc[9] = tf->lbal; 1100 desc[10] = tf->lbam; 1101 desc[11] = tf->lbah; 1102 } 1103 } 1104 1105 /** 1106 * ata_gen_ata_sense - generate a SCSI fixed sense block 1107 * @qc: Command that we are erroring out 1108 * 1109 * Generate sense block for a failed ATA command @qc. Descriptor 1110 * format is used to accommodate LBA48 block address. 1111 * 1112 * LOCKING: 1113 * None. 1114 */ 1115 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 1116 { 1117 struct ata_device *dev = qc->dev; 1118 struct scsi_cmnd *cmd = qc->scsicmd; 1119 struct ata_taskfile *tf = &qc->result_tf; 1120 unsigned char *sb = cmd->sense_buffer; 1121 int verbose = qc->ap->ops->error_handler == NULL; 1122 u64 block; 1123 u8 sense_key, asc, ascq; 1124 1125 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 1126 1127 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 1128 1129 if (ata_dev_disabled(dev)) { 1130 /* Device disabled after error recovery */ 1131 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ 1132 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); 1133 return; 1134 } 1135 /* Use ata_to_sense_error() to map status register bits 1136 * onto sense key, asc & ascq. 1137 */ 1138 if (qc->err_mask || 1139 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 1140 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, 1141 &sense_key, &asc, &ascq, verbose); 1142 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); 1143 } else { 1144 /* Could not decode error */ 1145 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", 1146 tf->command, qc->err_mask); 1147 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); 1148 return; 1149 } 1150 1151 block = ata_tf_read_block(&qc->result_tf, dev); 1152 if (block == U64_MAX) 1153 return; 1154 1155 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); 1156 } 1157 1158 static void ata_scsi_sdev_config(struct scsi_device *sdev) 1159 { 1160 sdev->use_10_for_rw = 1; 1161 sdev->use_10_for_ms = 1; 1162 sdev->no_write_same = 1; 1163 1164 /* Schedule policy is determined by ->qc_defer() callback and 1165 * it needs to see every deferred qc. Set dev_blocked to 1 to 1166 * prevent SCSI midlayer from automatically deferring 1167 * requests. 1168 */ 1169 sdev->max_device_blocked = 1; 1170 } 1171 1172 /** 1173 * atapi_drain_needed - Check whether data transfer may overflow 1174 * @rq: request to be checked 1175 * 1176 * ATAPI commands which transfer variable length data to host 1177 * might overflow due to application error or hardware bug. This 1178 * function checks whether overflow should be drained and ignored 1179 * for @request. 1180 * 1181 * LOCKING: 1182 * None. 1183 * 1184 * RETURNS: 1185 * 1 if ; otherwise, 0. 1186 */ 1187 static int atapi_drain_needed(struct request *rq) 1188 { 1189 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC)) 1190 return 0; 1191 1192 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq))) 1193 return 0; 1194 1195 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC; 1196 } 1197 1198 static int ata_scsi_dev_config(struct scsi_device *sdev, 1199 struct ata_device *dev) 1200 { 1201 struct request_queue *q = sdev->request_queue; 1202 1203 if (!ata_id_has_unload(dev->id)) 1204 dev->flags |= ATA_DFLAG_NO_UNLOAD; 1205 1206 /* configure max sectors */ 1207 blk_queue_max_hw_sectors(q, dev->max_sectors); 1208 1209 if (dev->class == ATA_DEV_ATAPI) { 1210 void *buf; 1211 1212 sdev->sector_size = ATA_SECT_SIZE; 1213 1214 /* set DMA padding */ 1215 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); 1216 1217 /* configure draining */ 1218 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); 1219 if (!buf) { 1220 ata_dev_err(dev, "drain buffer allocation failed\n"); 1221 return -ENOMEM; 1222 } 1223 1224 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); 1225 } else { 1226 sdev->sector_size = ata_id_logical_sector_size(dev->id); 1227 sdev->manage_start_stop = 1; 1228 } 1229 1230 /* 1231 * ata_pio_sectors() expects buffer for each sector to not cross 1232 * page boundary. Enforce it by requiring buffers to be sector 1233 * aligned, which works iff sector_size is not larger than 1234 * PAGE_SIZE. ATAPI devices also need the alignment as 1235 * IDENTIFY_PACKET is executed as ATA_PROT_PIO. 1236 */ 1237 if (sdev->sector_size > PAGE_SIZE) 1238 ata_dev_warn(dev, 1239 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", 1240 sdev->sector_size); 1241 1242 blk_queue_update_dma_alignment(q, sdev->sector_size - 1); 1243 1244 if (dev->flags & ATA_DFLAG_AN) 1245 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); 1246 1247 if (dev->flags & ATA_DFLAG_NCQ) { 1248 int depth; 1249 1250 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 1251 depth = min(ATA_MAX_QUEUE - 1, depth); 1252 scsi_change_queue_depth(sdev, depth); 1253 } 1254 1255 blk_queue_flush_queueable(q, false); 1256 1257 dev->sdev = sdev; 1258 return 0; 1259 } 1260 1261 /** 1262 * ata_scsi_slave_config - Set SCSI device attributes 1263 * @sdev: SCSI device to examine 1264 * 1265 * This is called before we actually start reading 1266 * and writing to the device, to configure certain 1267 * SCSI mid-layer behaviors. 1268 * 1269 * LOCKING: 1270 * Defined by SCSI layer. We don't really care. 1271 */ 1272 1273 int ata_scsi_slave_config(struct scsi_device *sdev) 1274 { 1275 struct ata_port *ap = ata_shost_to_port(sdev->host); 1276 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 1277 int rc = 0; 1278 1279 ata_scsi_sdev_config(sdev); 1280 1281 if (dev) 1282 rc = ata_scsi_dev_config(sdev, dev); 1283 1284 return rc; 1285 } 1286 1287 /** 1288 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 1289 * @sdev: SCSI device to be destroyed 1290 * 1291 * @sdev is about to be destroyed for hot/warm unplugging. If 1292 * this unplugging was initiated by libata as indicated by NULL 1293 * dev->sdev, this function doesn't have to do anything. 1294 * Otherwise, SCSI layer initiated warm-unplug is in progress. 1295 * Clear dev->sdev, schedule the device for ATA detach and invoke 1296 * EH. 1297 * 1298 * LOCKING: 1299 * Defined by SCSI layer. We don't really care. 1300 */ 1301 void ata_scsi_slave_destroy(struct scsi_device *sdev) 1302 { 1303 struct ata_port *ap = ata_shost_to_port(sdev->host); 1304 struct request_queue *q = sdev->request_queue; 1305 unsigned long flags; 1306 struct ata_device *dev; 1307 1308 if (!ap->ops->error_handler) 1309 return; 1310 1311 spin_lock_irqsave(ap->lock, flags); 1312 dev = __ata_scsi_find_dev(ap, sdev); 1313 if (dev && dev->sdev) { 1314 /* SCSI device already in CANCEL state, no need to offline it */ 1315 dev->sdev = NULL; 1316 dev->flags |= ATA_DFLAG_DETACH; 1317 ata_port_schedule_eh(ap); 1318 } 1319 spin_unlock_irqrestore(ap->lock, flags); 1320 1321 kfree(q->dma_drain_buffer); 1322 q->dma_drain_buffer = NULL; 1323 q->dma_drain_size = 0; 1324 } 1325 1326 /** 1327 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth 1328 * @ap: ATA port to which the device change the queue depth 1329 * @sdev: SCSI device to configure queue depth for 1330 * @queue_depth: new queue depth 1331 * 1332 * libsas and libata have different approaches for associating a sdev to 1333 * its ata_port. 1334 * 1335 */ 1336 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1337 int queue_depth) 1338 { 1339 struct ata_device *dev; 1340 unsigned long flags; 1341 1342 if (queue_depth < 1 || queue_depth == sdev->queue_depth) 1343 return sdev->queue_depth; 1344 1345 dev = ata_scsi_find_dev(ap, sdev); 1346 if (!dev || !ata_dev_enabled(dev)) 1347 return sdev->queue_depth; 1348 1349 /* NCQ enabled? */ 1350 spin_lock_irqsave(ap->lock, flags); 1351 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 1352 if (queue_depth == 1 || !ata_ncq_enabled(dev)) { 1353 dev->flags |= ATA_DFLAG_NCQ_OFF; 1354 queue_depth = 1; 1355 } 1356 spin_unlock_irqrestore(ap->lock, flags); 1357 1358 /* limit and apply queue depth */ 1359 queue_depth = min(queue_depth, sdev->host->can_queue); 1360 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); 1361 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1); 1362 1363 if (sdev->queue_depth == queue_depth) 1364 return -EINVAL; 1365 1366 return scsi_change_queue_depth(sdev, queue_depth); 1367 } 1368 1369 /** 1370 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 1371 * @sdev: SCSI device to configure queue depth for 1372 * @queue_depth: new queue depth 1373 * 1374 * This is libata standard hostt->change_queue_depth callback. 1375 * SCSI will call into this callback when user tries to set queue 1376 * depth via sysfs. 1377 * 1378 * LOCKING: 1379 * SCSI layer (we don't care) 1380 * 1381 * RETURNS: 1382 * Newly configured queue depth. 1383 */ 1384 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) 1385 { 1386 struct ata_port *ap = ata_shost_to_port(sdev->host); 1387 1388 return __ata_change_queue_depth(ap, sdev, queue_depth); 1389 } 1390 1391 /** 1392 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 1393 * @qc: Storage for translated ATA taskfile 1394 * 1395 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 1396 * (to start). Perhaps these commands should be preceded by 1397 * CHECK POWER MODE to see what power mode the device is already in. 1398 * [See SAT revision 5 at www.t10.org] 1399 * 1400 * LOCKING: 1401 * spin_lock_irqsave(host lock) 1402 * 1403 * RETURNS: 1404 * Zero on success, non-zero on error. 1405 */ 1406 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 1407 { 1408 struct scsi_cmnd *scmd = qc->scsicmd; 1409 struct ata_taskfile *tf = &qc->tf; 1410 const u8 *cdb = scmd->cmnd; 1411 u16 fp; 1412 u8 bp = 0xff; 1413 1414 if (scmd->cmd_len < 5) { 1415 fp = 4; 1416 goto invalid_fld; 1417 } 1418 1419 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1420 tf->protocol = ATA_PROT_NODATA; 1421 if (cdb[1] & 0x1) { 1422 ; /* ignore IMMED bit, violates sat-r05 */ 1423 } 1424 if (cdb[4] & 0x2) { 1425 fp = 4; 1426 bp = 1; 1427 goto invalid_fld; /* LOEJ bit set not supported */ 1428 } 1429 if (((cdb[4] >> 4) & 0xf) != 0) { 1430 fp = 4; 1431 bp = 3; 1432 goto invalid_fld; /* power conditions not supported */ 1433 } 1434 1435 if (cdb[4] & 0x1) { 1436 tf->nsect = 1; /* 1 sector, lba=0 */ 1437 1438 if (qc->dev->flags & ATA_DFLAG_LBA) { 1439 tf->flags |= ATA_TFLAG_LBA; 1440 1441 tf->lbah = 0x0; 1442 tf->lbam = 0x0; 1443 tf->lbal = 0x0; 1444 tf->device |= ATA_LBA; 1445 } else { 1446 /* CHS */ 1447 tf->lbal = 0x1; /* sect */ 1448 tf->lbam = 0x0; /* cyl low */ 1449 tf->lbah = 0x0; /* cyl high */ 1450 } 1451 1452 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1453 } else { 1454 /* Some odd clown BIOSen issue spindown on power off (ACPI S4 1455 * or S5) causing some drives to spin up and down again. 1456 */ 1457 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 1458 system_state == SYSTEM_POWER_OFF) 1459 goto skip; 1460 1461 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 1462 system_entering_hibernation()) 1463 goto skip; 1464 1465 /* Issue ATA STANDBY IMMEDIATE command */ 1466 tf->command = ATA_CMD_STANDBYNOW1; 1467 } 1468 1469 /* 1470 * Standby and Idle condition timers could be implemented but that 1471 * would require libata to implement the Power condition mode page 1472 * and allow the user to change it. Changing mode pages requires 1473 * MODE SELECT to be implemented. 1474 */ 1475 1476 return 0; 1477 1478 invalid_fld: 1479 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 1480 return 1; 1481 skip: 1482 scmd->result = SAM_STAT_GOOD; 1483 return 1; 1484 } 1485 1486 1487 /** 1488 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1489 * @qc: Storage for translated ATA taskfile 1490 * 1491 * Sets up an ATA taskfile to issue FLUSH CACHE or 1492 * FLUSH CACHE EXT. 1493 * 1494 * LOCKING: 1495 * spin_lock_irqsave(host lock) 1496 * 1497 * RETURNS: 1498 * Zero on success, non-zero on error. 1499 */ 1500 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1501 { 1502 struct ata_taskfile *tf = &qc->tf; 1503 1504 tf->flags |= ATA_TFLAG_DEVICE; 1505 tf->protocol = ATA_PROT_NODATA; 1506 1507 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1508 tf->command = ATA_CMD_FLUSH_EXT; 1509 else 1510 tf->command = ATA_CMD_FLUSH; 1511 1512 /* flush is critical for IO integrity, consider it an IO command */ 1513 qc->flags |= ATA_QCFLAG_IO; 1514 1515 return 0; 1516 } 1517 1518 /** 1519 * scsi_6_lba_len - Get LBA and transfer length 1520 * @cdb: SCSI command to translate 1521 * 1522 * Calculate LBA and transfer length for 6-byte commands. 1523 * 1524 * RETURNS: 1525 * @plba: the LBA 1526 * @plen: the transfer length 1527 */ 1528 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1529 { 1530 u64 lba = 0; 1531 u32 len; 1532 1533 VPRINTK("six-byte command\n"); 1534 1535 lba |= ((u64)(cdb[1] & 0x1f)) << 16; 1536 lba |= ((u64)cdb[2]) << 8; 1537 lba |= ((u64)cdb[3]); 1538 1539 len = cdb[4]; 1540 1541 *plba = lba; 1542 *plen = len; 1543 } 1544 1545 /** 1546 * scsi_10_lba_len - Get LBA and transfer length 1547 * @cdb: SCSI command to translate 1548 * 1549 * Calculate LBA and transfer length for 10-byte commands. 1550 * 1551 * RETURNS: 1552 * @plba: the LBA 1553 * @plen: the transfer length 1554 */ 1555 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1556 { 1557 u64 lba = 0; 1558 u32 len = 0; 1559 1560 VPRINTK("ten-byte command\n"); 1561 1562 lba |= ((u64)cdb[2]) << 24; 1563 lba |= ((u64)cdb[3]) << 16; 1564 lba |= ((u64)cdb[4]) << 8; 1565 lba |= ((u64)cdb[5]); 1566 1567 len |= ((u32)cdb[7]) << 8; 1568 len |= ((u32)cdb[8]); 1569 1570 *plba = lba; 1571 *plen = len; 1572 } 1573 1574 /** 1575 * scsi_16_lba_len - Get LBA and transfer length 1576 * @cdb: SCSI command to translate 1577 * 1578 * Calculate LBA and transfer length for 16-byte commands. 1579 * 1580 * RETURNS: 1581 * @plba: the LBA 1582 * @plen: the transfer length 1583 */ 1584 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1585 { 1586 u64 lba = 0; 1587 u32 len = 0; 1588 1589 VPRINTK("sixteen-byte command\n"); 1590 1591 lba |= ((u64)cdb[2]) << 56; 1592 lba |= ((u64)cdb[3]) << 48; 1593 lba |= ((u64)cdb[4]) << 40; 1594 lba |= ((u64)cdb[5]) << 32; 1595 lba |= ((u64)cdb[6]) << 24; 1596 lba |= ((u64)cdb[7]) << 16; 1597 lba |= ((u64)cdb[8]) << 8; 1598 lba |= ((u64)cdb[9]); 1599 1600 len |= ((u32)cdb[10]) << 24; 1601 len |= ((u32)cdb[11]) << 16; 1602 len |= ((u32)cdb[12]) << 8; 1603 len |= ((u32)cdb[13]); 1604 1605 *plba = lba; 1606 *plen = len; 1607 } 1608 1609 /** 1610 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1611 * @qc: Storage for translated ATA taskfile 1612 * 1613 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1614 * 1615 * LOCKING: 1616 * spin_lock_irqsave(host lock) 1617 * 1618 * RETURNS: 1619 * Zero on success, non-zero on error. 1620 */ 1621 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1622 { 1623 struct scsi_cmnd *scmd = qc->scsicmd; 1624 struct ata_taskfile *tf = &qc->tf; 1625 struct ata_device *dev = qc->dev; 1626 u64 dev_sectors = qc->dev->n_sectors; 1627 const u8 *cdb = scmd->cmnd; 1628 u64 block; 1629 u32 n_block; 1630 u16 fp; 1631 1632 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1633 tf->protocol = ATA_PROT_NODATA; 1634 1635 if (cdb[0] == VERIFY) { 1636 if (scmd->cmd_len < 10) { 1637 fp = 9; 1638 goto invalid_fld; 1639 } 1640 scsi_10_lba_len(cdb, &block, &n_block); 1641 } else if (cdb[0] == VERIFY_16) { 1642 if (scmd->cmd_len < 16) { 1643 fp = 15; 1644 goto invalid_fld; 1645 } 1646 scsi_16_lba_len(cdb, &block, &n_block); 1647 } else { 1648 fp = 0; 1649 goto invalid_fld; 1650 } 1651 1652 if (!n_block) 1653 goto nothing_to_do; 1654 if (block >= dev_sectors) 1655 goto out_of_range; 1656 if ((block + n_block) > dev_sectors) 1657 goto out_of_range; 1658 1659 if (dev->flags & ATA_DFLAG_LBA) { 1660 tf->flags |= ATA_TFLAG_LBA; 1661 1662 if (lba_28_ok(block, n_block)) { 1663 /* use LBA28 */ 1664 tf->command = ATA_CMD_VERIFY; 1665 tf->device |= (block >> 24) & 0xf; 1666 } else if (lba_48_ok(block, n_block)) { 1667 if (!(dev->flags & ATA_DFLAG_LBA48)) 1668 goto out_of_range; 1669 1670 /* use LBA48 */ 1671 tf->flags |= ATA_TFLAG_LBA48; 1672 tf->command = ATA_CMD_VERIFY_EXT; 1673 1674 tf->hob_nsect = (n_block >> 8) & 0xff; 1675 1676 tf->hob_lbah = (block >> 40) & 0xff; 1677 tf->hob_lbam = (block >> 32) & 0xff; 1678 tf->hob_lbal = (block >> 24) & 0xff; 1679 } else 1680 /* request too large even for LBA48 */ 1681 goto out_of_range; 1682 1683 tf->nsect = n_block & 0xff; 1684 1685 tf->lbah = (block >> 16) & 0xff; 1686 tf->lbam = (block >> 8) & 0xff; 1687 tf->lbal = block & 0xff; 1688 1689 tf->device |= ATA_LBA; 1690 } else { 1691 /* CHS */ 1692 u32 sect, head, cyl, track; 1693 1694 if (!lba_28_ok(block, n_block)) 1695 goto out_of_range; 1696 1697 /* Convert LBA to CHS */ 1698 track = (u32)block / dev->sectors; 1699 cyl = track / dev->heads; 1700 head = track % dev->heads; 1701 sect = (u32)block % dev->sectors + 1; 1702 1703 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1704 (u32)block, track, cyl, head, sect); 1705 1706 /* Check whether the converted CHS can fit. 1707 Cylinder: 0-65535 1708 Head: 0-15 1709 Sector: 1-255*/ 1710 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1711 goto out_of_range; 1712 1713 tf->command = ATA_CMD_VERIFY; 1714 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1715 tf->lbal = sect; 1716 tf->lbam = cyl; 1717 tf->lbah = cyl >> 8; 1718 tf->device |= head; 1719 } 1720 1721 return 0; 1722 1723 invalid_fld: 1724 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1725 return 1; 1726 1727 out_of_range: 1728 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1729 /* "Logical Block Address out of range" */ 1730 return 1; 1731 1732 nothing_to_do: 1733 scmd->result = SAM_STAT_GOOD; 1734 return 1; 1735 } 1736 1737 /** 1738 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1739 * @qc: Storage for translated ATA taskfile 1740 * 1741 * Converts any of six SCSI read/write commands into the 1742 * ATA counterpart, including starting sector (LBA), 1743 * sector count, and taking into account the device's LBA48 1744 * support. 1745 * 1746 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1747 * %WRITE_16 are currently supported. 1748 * 1749 * LOCKING: 1750 * spin_lock_irqsave(host lock) 1751 * 1752 * RETURNS: 1753 * Zero on success, non-zero on error. 1754 */ 1755 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1756 { 1757 struct scsi_cmnd *scmd = qc->scsicmd; 1758 const u8 *cdb = scmd->cmnd; 1759 unsigned int tf_flags = 0; 1760 u64 block; 1761 u32 n_block; 1762 int rc; 1763 u16 fp = 0; 1764 1765 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1766 tf_flags |= ATA_TFLAG_WRITE; 1767 1768 /* Calculate the SCSI LBA, transfer length and FUA. */ 1769 switch (cdb[0]) { 1770 case READ_10: 1771 case WRITE_10: 1772 if (unlikely(scmd->cmd_len < 10)) { 1773 fp = 9; 1774 goto invalid_fld; 1775 } 1776 scsi_10_lba_len(cdb, &block, &n_block); 1777 if (cdb[1] & (1 << 3)) 1778 tf_flags |= ATA_TFLAG_FUA; 1779 break; 1780 case READ_6: 1781 case WRITE_6: 1782 if (unlikely(scmd->cmd_len < 6)) { 1783 fp = 5; 1784 goto invalid_fld; 1785 } 1786 scsi_6_lba_len(cdb, &block, &n_block); 1787 1788 /* for 6-byte r/w commands, transfer length 0 1789 * means 256 blocks of data, not 0 block. 1790 */ 1791 if (!n_block) 1792 n_block = 256; 1793 break; 1794 case READ_16: 1795 case WRITE_16: 1796 if (unlikely(scmd->cmd_len < 16)) { 1797 fp = 15; 1798 goto invalid_fld; 1799 } 1800 scsi_16_lba_len(cdb, &block, &n_block); 1801 if (cdb[1] & (1 << 3)) 1802 tf_flags |= ATA_TFLAG_FUA; 1803 break; 1804 default: 1805 DPRINTK("no-byte command\n"); 1806 fp = 0; 1807 goto invalid_fld; 1808 } 1809 1810 /* Check and compose ATA command */ 1811 if (!n_block) 1812 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1813 * length 0 means transfer 0 block of data. 1814 * However, for ATA R/W commands, sector count 0 means 1815 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1816 * 1817 * WARNING: one or two older ATA drives treat 0 as 0... 1818 */ 1819 goto nothing_to_do; 1820 1821 qc->flags |= ATA_QCFLAG_IO; 1822 qc->nbytes = n_block * scmd->device->sector_size; 1823 1824 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1825 qc->tag); 1826 if (likely(rc == 0)) 1827 return 0; 1828 1829 if (rc == -ERANGE) 1830 goto out_of_range; 1831 /* treat all other errors as -EINVAL, fall through */ 1832 invalid_fld: 1833 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 1834 return 1; 1835 1836 out_of_range: 1837 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1838 /* "Logical Block Address out of range" */ 1839 return 1; 1840 1841 nothing_to_do: 1842 scmd->result = SAM_STAT_GOOD; 1843 return 1; 1844 } 1845 1846 static void ata_qc_done(struct ata_queued_cmd *qc) 1847 { 1848 struct scsi_cmnd *cmd = qc->scsicmd; 1849 void (*done)(struct scsi_cmnd *) = qc->scsidone; 1850 1851 ata_qc_free(qc); 1852 done(cmd); 1853 } 1854 1855 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1856 { 1857 struct ata_port *ap = qc->ap; 1858 struct scsi_cmnd *cmd = qc->scsicmd; 1859 u8 *cdb = cmd->cmnd; 1860 int need_sense = (qc->err_mask != 0); 1861 1862 /* For ATA pass thru (SAT) commands, generate a sense block if 1863 * user mandated it or if there's an error. Note that if we 1864 * generate because the user forced us to [CK_COND =1], a check 1865 * condition is generated and the ATA register values are returned 1866 * whether the command completed successfully or not. If there 1867 * was no error, we use the following sense data: 1868 * sk = RECOVERED ERROR 1869 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE 1870 */ 1871 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1872 ((cdb[2] & 0x20) || need_sense)) 1873 ata_gen_passthru_sense(qc); 1874 else if (qc->flags & ATA_QCFLAG_SENSE_VALID) 1875 cmd->result = SAM_STAT_CHECK_CONDITION; 1876 else if (need_sense) 1877 ata_gen_ata_sense(qc); 1878 else 1879 cmd->result = SAM_STAT_GOOD; 1880 1881 if (need_sense && !ap->ops->error_handler) 1882 ata_dump_status(ap->print_id, &qc->result_tf); 1883 1884 ata_qc_done(qc); 1885 } 1886 1887 /** 1888 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1889 * @dev: ATA device to which the command is addressed 1890 * @cmd: SCSI command to execute 1891 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1892 * 1893 * Our ->queuecommand() function has decided that the SCSI 1894 * command issued can be directly translated into an ATA 1895 * command, rather than handled internally. 1896 * 1897 * This function sets up an ata_queued_cmd structure for the 1898 * SCSI command, and sends that ata_queued_cmd to the hardware. 1899 * 1900 * The xlat_func argument (actor) returns 0 if ready to execute 1901 * ATA command, else 1 to finish translation. If 1 is returned 1902 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1903 * to be set reflecting an error condition or clean (early) 1904 * termination. 1905 * 1906 * LOCKING: 1907 * spin_lock_irqsave(host lock) 1908 * 1909 * RETURNS: 1910 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1911 * needs to be deferred. 1912 */ 1913 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1914 ata_xlat_func_t xlat_func) 1915 { 1916 struct ata_port *ap = dev->link->ap; 1917 struct ata_queued_cmd *qc; 1918 int rc; 1919 1920 VPRINTK("ENTER\n"); 1921 1922 qc = ata_scsi_qc_new(dev, cmd); 1923 if (!qc) 1924 goto err_mem; 1925 1926 /* data is present; dma-map it */ 1927 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1928 cmd->sc_data_direction == DMA_TO_DEVICE) { 1929 if (unlikely(scsi_bufflen(cmd) < 1)) { 1930 ata_dev_warn(dev, "WARNING: zero len r/w req\n"); 1931 goto err_did; 1932 } 1933 1934 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd)); 1935 1936 qc->dma_dir = cmd->sc_data_direction; 1937 } 1938 1939 qc->complete_fn = ata_scsi_qc_complete; 1940 1941 if (xlat_func(qc)) 1942 goto early_finish; 1943 1944 if (ap->ops->qc_defer) { 1945 if ((rc = ap->ops->qc_defer(qc))) 1946 goto defer; 1947 } 1948 1949 /* select device, send command to hardware */ 1950 ata_qc_issue(qc); 1951 1952 VPRINTK("EXIT\n"); 1953 return 0; 1954 1955 early_finish: 1956 ata_qc_free(qc); 1957 cmd->scsi_done(cmd); 1958 DPRINTK("EXIT - early finish (good or error)\n"); 1959 return 0; 1960 1961 err_did: 1962 ata_qc_free(qc); 1963 cmd->result = (DID_ERROR << 16); 1964 cmd->scsi_done(cmd); 1965 err_mem: 1966 DPRINTK("EXIT - internal\n"); 1967 return 0; 1968 1969 defer: 1970 ata_qc_free(qc); 1971 DPRINTK("EXIT - defer\n"); 1972 if (rc == ATA_DEFER_LINK) 1973 return SCSI_MLQUEUE_DEVICE_BUSY; 1974 else 1975 return SCSI_MLQUEUE_HOST_BUSY; 1976 } 1977 1978 /** 1979 * ata_scsi_rbuf_get - Map response buffer. 1980 * @cmd: SCSI command containing buffer to be mapped. 1981 * @flags: unsigned long variable to store irq enable status 1982 * @copy_in: copy in from user buffer 1983 * 1984 * Prepare buffer for simulated SCSI commands. 1985 * 1986 * LOCKING: 1987 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success 1988 * 1989 * RETURNS: 1990 * Pointer to response buffer. 1991 */ 1992 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, 1993 unsigned long *flags) 1994 { 1995 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); 1996 1997 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); 1998 if (copy_in) 1999 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2000 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2001 return ata_scsi_rbuf; 2002 } 2003 2004 /** 2005 * ata_scsi_rbuf_put - Unmap response buffer. 2006 * @cmd: SCSI command containing buffer to be unmapped. 2007 * @copy_out: copy out result 2008 * @flags: @flags passed to ata_scsi_rbuf_get() 2009 * 2010 * Returns rbuf buffer. The result is copied to @cmd's buffer if 2011 * @copy_back is true. 2012 * 2013 * LOCKING: 2014 * Unlocks ata_scsi_rbuf_lock. 2015 */ 2016 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, 2017 unsigned long *flags) 2018 { 2019 if (copy_out) 2020 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), 2021 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); 2022 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); 2023 } 2024 2025 /** 2026 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 2027 * @args: device IDENTIFY data / SCSI command of interest. 2028 * @actor: Callback hook for desired SCSI command simulator 2029 * 2030 * Takes care of the hard work of simulating a SCSI command... 2031 * Mapping the response buffer, calling the command's handler, 2032 * and handling the handler's return value. This return value 2033 * indicates whether the handler wishes the SCSI command to be 2034 * completed successfully (0), or not (in which case cmd->result 2035 * and sense buffer are assumed to be set). 2036 * 2037 * LOCKING: 2038 * spin_lock_irqsave(host lock) 2039 */ 2040 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 2041 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) 2042 { 2043 u8 *rbuf; 2044 unsigned int rc; 2045 struct scsi_cmnd *cmd = args->cmd; 2046 unsigned long flags; 2047 2048 rbuf = ata_scsi_rbuf_get(cmd, false, &flags); 2049 rc = actor(args, rbuf); 2050 ata_scsi_rbuf_put(cmd, rc == 0, &flags); 2051 2052 if (rc == 0) 2053 cmd->result = SAM_STAT_GOOD; 2054 args->done(cmd); 2055 } 2056 2057 /** 2058 * ata_scsiop_inq_std - Simulate INQUIRY command 2059 * @args: device IDENTIFY data / SCSI command of interest. 2060 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2061 * 2062 * Returns standard device identification data associated 2063 * with non-VPD INQUIRY command output. 2064 * 2065 * LOCKING: 2066 * spin_lock_irqsave(host lock) 2067 */ 2068 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 2069 { 2070 const u8 versions[] = { 2071 0x00, 2072 0x60, /* SAM-3 (no version claimed) */ 2073 2074 0x03, 2075 0x20, /* SBC-2 (no version claimed) */ 2076 2077 0x03, 2078 0x00 /* SPC-3 (no version claimed) */ 2079 }; 2080 const u8 versions_zbc[] = { 2081 0x00, 2082 0xA0, /* SAM-5 (no version claimed) */ 2083 2084 0x06, 2085 0x00, /* SBC-4 (no version claimed) */ 2086 2087 0x05, 2088 0xC0, /* SPC-5 (no version claimed) */ 2089 2090 0x60, 2091 0x24, /* ZBC r05 */ 2092 }; 2093 2094 u8 hdr[] = { 2095 TYPE_DISK, 2096 0, 2097 0x5, /* claim SPC-3 version compatibility */ 2098 2, 2099 95 - 4, 2100 0, 2101 0, 2102 2 2103 }; 2104 2105 VPRINTK("ENTER\n"); 2106 2107 /* set scsi removable (RMB) bit per ata bit, or if the 2108 * AHCI port says it's external (Hotplug-capable, eSATA). 2109 */ 2110 if (ata_id_removable(args->id) || 2111 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) 2112 hdr[1] |= (1 << 7); 2113 2114 if (args->dev->class == ATA_DEV_ZAC) { 2115 hdr[0] = TYPE_ZBC; 2116 hdr[2] = 0x7; /* claim SPC-5 version compatibility */ 2117 } 2118 2119 memcpy(rbuf, hdr, sizeof(hdr)); 2120 memcpy(&rbuf[8], "ATA ", 8); 2121 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); 2122 2123 /* From SAT, use last 2 words from fw rev unless they are spaces */ 2124 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); 2125 if (strncmp(&rbuf[32], " ", 4) == 0) 2126 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); 2127 2128 if (rbuf[32] == 0 || rbuf[32] == ' ') 2129 memcpy(&rbuf[32], "n/a ", 4); 2130 2131 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) 2132 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); 2133 else 2134 memcpy(rbuf + 58, versions, sizeof(versions)); 2135 2136 return 0; 2137 } 2138 2139 /** 2140 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 2141 * @args: device IDENTIFY data / SCSI command of interest. 2142 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2143 * 2144 * Returns list of inquiry VPD pages available. 2145 * 2146 * LOCKING: 2147 * spin_lock_irqsave(host lock) 2148 */ 2149 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 2150 { 2151 int num_pages; 2152 const u8 pages[] = { 2153 0x00, /* page 0x00, this page */ 2154 0x80, /* page 0x80, unit serial no page */ 2155 0x83, /* page 0x83, device ident page */ 2156 0x89, /* page 0x89, ata info page */ 2157 0xb0, /* page 0xb0, block limits page */ 2158 0xb1, /* page 0xb1, block device characteristics page */ 2159 0xb2, /* page 0xb2, thin provisioning page */ 2160 0xb6, /* page 0xb6, zoned block device characteristics */ 2161 }; 2162 2163 num_pages = sizeof(pages); 2164 if (!(args->dev->flags & ATA_DFLAG_ZAC)) 2165 num_pages--; 2166 rbuf[3] = num_pages; /* number of supported VPD pages */ 2167 memcpy(rbuf + 4, pages, num_pages); 2168 return 0; 2169 } 2170 2171 /** 2172 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 2173 * @args: device IDENTIFY data / SCSI command of interest. 2174 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2175 * 2176 * Returns ATA device serial number. 2177 * 2178 * LOCKING: 2179 * spin_lock_irqsave(host lock) 2180 */ 2181 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) 2182 { 2183 const u8 hdr[] = { 2184 0, 2185 0x80, /* this page code */ 2186 0, 2187 ATA_ID_SERNO_LEN, /* page len */ 2188 }; 2189 2190 memcpy(rbuf, hdr, sizeof(hdr)); 2191 ata_id_string(args->id, (unsigned char *) &rbuf[4], 2192 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2193 return 0; 2194 } 2195 2196 /** 2197 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 2198 * @args: device IDENTIFY data / SCSI command of interest. 2199 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2200 * 2201 * Yields two logical unit device identification designators: 2202 * - vendor specific ASCII containing the ATA serial number 2203 * - SAT defined "t10 vendor id based" containing ASCII vendor 2204 * name ("ATA "), model and serial numbers. 2205 * 2206 * LOCKING: 2207 * spin_lock_irqsave(host lock) 2208 */ 2209 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) 2210 { 2211 const int sat_model_serial_desc_len = 68; 2212 int num; 2213 2214 rbuf[1] = 0x83; /* this page code */ 2215 num = 4; 2216 2217 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 2218 rbuf[num + 0] = 2; 2219 rbuf[num + 3] = ATA_ID_SERNO_LEN; 2220 num += 4; 2221 ata_id_string(args->id, (unsigned char *) rbuf + num, 2222 ATA_ID_SERNO, ATA_ID_SERNO_LEN); 2223 num += ATA_ID_SERNO_LEN; 2224 2225 /* SAT defined lu model and serial numbers descriptor */ 2226 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 2227 rbuf[num + 0] = 2; 2228 rbuf[num + 1] = 1; 2229 rbuf[num + 3] = sat_model_serial_desc_len; 2230 num += 4; 2231 memcpy(rbuf + num, "ATA ", 8); 2232 num += 8; 2233 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, 2234 ATA_ID_PROD_LEN); 2235 num += ATA_ID_PROD_LEN; 2236 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, 2237 ATA_ID_SERNO_LEN); 2238 num += ATA_ID_SERNO_LEN; 2239 2240 if (ata_id_has_wwn(args->id)) { 2241 /* SAT defined lu world wide name */ 2242 /* piv=0, assoc=lu, code_set=binary, designator=NAA */ 2243 rbuf[num + 0] = 1; 2244 rbuf[num + 1] = 3; 2245 rbuf[num + 3] = ATA_ID_WWN_LEN; 2246 num += 4; 2247 ata_id_string(args->id, (unsigned char *) rbuf + num, 2248 ATA_ID_WWN, ATA_ID_WWN_LEN); 2249 num += ATA_ID_WWN_LEN; 2250 } 2251 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 2252 return 0; 2253 } 2254 2255 /** 2256 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info 2257 * @args: device IDENTIFY data / SCSI command of interest. 2258 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2259 * 2260 * Yields SAT-specified ATA VPD page. 2261 * 2262 * LOCKING: 2263 * spin_lock_irqsave(host lock) 2264 */ 2265 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) 2266 { 2267 struct ata_taskfile tf; 2268 2269 memset(&tf, 0, sizeof(tf)); 2270 2271 rbuf[1] = 0x89; /* our page code */ 2272 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ 2273 rbuf[3] = (0x238 & 0xff); 2274 2275 memcpy(&rbuf[8], "linux ", 8); 2276 memcpy(&rbuf[16], "libata ", 16); 2277 memcpy(&rbuf[32], DRV_VERSION, 4); 2278 2279 /* we don't store the ATA device signature, so we fake it */ 2280 2281 tf.command = ATA_DRDY; /* really, this is Status reg */ 2282 tf.lbal = 0x1; 2283 tf.nsect = 0x1; 2284 2285 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ 2286 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ 2287 2288 rbuf[56] = ATA_CMD_ID_ATA; 2289 2290 memcpy(&rbuf[60], &args->id[0], 512); 2291 return 0; 2292 } 2293 2294 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) 2295 { 2296 u16 min_io_sectors; 2297 2298 rbuf[1] = 0xb0; 2299 rbuf[3] = 0x3c; /* required VPD size with unmap support */ 2300 2301 /* 2302 * Optimal transfer length granularity. 2303 * 2304 * This is always one physical block, but for disks with a smaller 2305 * logical than physical sector size we need to figure out what the 2306 * latter is. 2307 */ 2308 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); 2309 put_unaligned_be16(min_io_sectors, &rbuf[6]); 2310 2311 /* 2312 * Optimal unmap granularity. 2313 * 2314 * The ATA spec doesn't even know about a granularity or alignment 2315 * for the TRIM command. We can leave away most of the unmap related 2316 * VPD page entries, but we have specifify a granularity to signal 2317 * that we support some form of unmap - in thise case via WRITE SAME 2318 * with the unmap bit set. 2319 */ 2320 if (ata_id_has_trim(args->id)) { 2321 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); 2322 put_unaligned_be32(1, &rbuf[28]); 2323 } 2324 2325 return 0; 2326 } 2327 2328 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) 2329 { 2330 int form_factor = ata_id_form_factor(args->id); 2331 int media_rotation_rate = ata_id_rotation_rate(args->id); 2332 u8 zoned = ata_id_zoned_cap(args->id); 2333 2334 rbuf[1] = 0xb1; 2335 rbuf[3] = 0x3c; 2336 rbuf[4] = media_rotation_rate >> 8; 2337 rbuf[5] = media_rotation_rate; 2338 rbuf[7] = form_factor; 2339 if (zoned) 2340 rbuf[8] = (zoned << 4); 2341 2342 return 0; 2343 } 2344 2345 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) 2346 { 2347 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ 2348 rbuf[1] = 0xb2; 2349 rbuf[3] = 0x4; 2350 rbuf[5] = 1 << 6; /* TPWS */ 2351 2352 return 0; 2353 } 2354 2355 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) 2356 { 2357 /* 2358 * zbc-r05 SCSI Zoned Block device characteristics VPD page 2359 */ 2360 rbuf[1] = 0xb6; 2361 rbuf[3] = 0x3C; 2362 2363 /* 2364 * URSWRZ bit is only meaningful for host-managed ZAC drives 2365 */ 2366 if (args->dev->zac_zoned_cap & 1) 2367 rbuf[4] |= 1; 2368 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); 2369 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); 2370 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); 2371 2372 return 0; 2373 } 2374 2375 /** 2376 * ata_scsiop_noop - Command handler that simply returns success. 2377 * @args: device IDENTIFY data / SCSI command of interest. 2378 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2379 * 2380 * No operation. Simply returns success to caller, to indicate 2381 * that the caller should successfully complete this SCSI command. 2382 * 2383 * LOCKING: 2384 * spin_lock_irqsave(host lock) 2385 */ 2386 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf) 2387 { 2388 VPRINTK("ENTER\n"); 2389 return 0; 2390 } 2391 2392 /** 2393 * modecpy - Prepare response for MODE SENSE 2394 * @dest: output buffer 2395 * @src: data being copied 2396 * @n: length of mode page 2397 * @changeable: whether changeable parameters are requested 2398 * 2399 * Generate a generic MODE SENSE page for either current or changeable 2400 * parameters. 2401 * 2402 * LOCKING: 2403 * None. 2404 */ 2405 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable) 2406 { 2407 if (changeable) { 2408 memcpy(dest, src, 2); 2409 memset(dest + 2, 0, n - 2); 2410 } else { 2411 memcpy(dest, src, n); 2412 } 2413 } 2414 2415 /** 2416 * ata_msense_caching - Simulate MODE SENSE caching info page 2417 * @id: device IDENTIFY data 2418 * @buf: output buffer 2419 * @changeable: whether changeable parameters are requested 2420 * 2421 * Generate a caching info page, which conditionally indicates 2422 * write caching to the SCSI layer, depending on device 2423 * capabilities. 2424 * 2425 * LOCKING: 2426 * None. 2427 */ 2428 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) 2429 { 2430 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable); 2431 if (changeable) { 2432 buf[2] |= (1 << 2); /* ata_mselect_caching() */ 2433 } else { 2434 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */ 2435 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */ 2436 } 2437 return sizeof(def_cache_mpage); 2438 } 2439 2440 /** 2441 * ata_msense_control - Simulate MODE SENSE control mode page 2442 * @dev: ATA device of interest 2443 * @buf: output buffer 2444 * @changeable: whether changeable parameters are requested 2445 * 2446 * Generate a generic MODE SENSE control mode page. 2447 * 2448 * LOCKING: 2449 * None. 2450 */ 2451 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, 2452 bool changeable) 2453 { 2454 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); 2455 if (changeable) { 2456 buf[2] |= (1 << 2); /* ata_mselect_control() */ 2457 } else { 2458 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); 2459 2460 buf[2] |= (d_sense << 2); /* descriptor format sense data */ 2461 } 2462 return sizeof(def_control_mpage); 2463 } 2464 2465 /** 2466 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 2467 * @buf: output buffer 2468 * @changeable: whether changeable parameters are requested 2469 * 2470 * Generate a generic MODE SENSE r/w error recovery page. 2471 * 2472 * LOCKING: 2473 * None. 2474 */ 2475 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) 2476 { 2477 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage), 2478 changeable); 2479 return sizeof(def_rw_recovery_mpage); 2480 } 2481 2482 /* 2483 * We can turn this into a real blacklist if it's needed, for now just 2484 * blacklist any Maxtor BANC1G10 revision firmware 2485 */ 2486 static int ata_dev_supports_fua(u16 *id) 2487 { 2488 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; 2489 2490 if (!libata_fua) 2491 return 0; 2492 if (!ata_id_has_fua(id)) 2493 return 0; 2494 2495 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); 2496 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); 2497 2498 if (strcmp(model, "Maxtor")) 2499 return 1; 2500 if (strcmp(fw, "BANC1G10")) 2501 return 1; 2502 2503 return 0; /* blacklisted */ 2504 } 2505 2506 /** 2507 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 2508 * @args: device IDENTIFY data / SCSI command of interest. 2509 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2510 * 2511 * Simulate MODE SENSE commands. Assume this is invoked for direct 2512 * access devices (e.g. disks) only. There should be no block 2513 * descriptor for other device types. 2514 * 2515 * LOCKING: 2516 * spin_lock_irqsave(host lock) 2517 */ 2518 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) 2519 { 2520 struct ata_device *dev = args->dev; 2521 u8 *scsicmd = args->cmd->cmnd, *p = rbuf; 2522 const u8 sat_blk_desc[] = { 2523 0, 0, 0, 0, /* number of blocks: sat unspecified */ 2524 0, 2525 0, 0x2, 0x0 /* block length: 512 bytes */ 2526 }; 2527 u8 pg, spg; 2528 unsigned int ebd, page_control, six_byte; 2529 u8 dpofua, bp = 0xff; 2530 u16 fp; 2531 2532 VPRINTK("ENTER\n"); 2533 2534 six_byte = (scsicmd[0] == MODE_SENSE); 2535 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2536 /* 2537 * LLBA bit in msense(10) ignored (compliant) 2538 */ 2539 2540 page_control = scsicmd[2] >> 6; 2541 switch (page_control) { 2542 case 0: /* current */ 2543 case 1: /* changeable */ 2544 case 2: /* defaults */ 2545 break; /* supported */ 2546 case 3: /* saved */ 2547 goto saving_not_supp; 2548 default: 2549 fp = 2; 2550 bp = 6; 2551 goto invalid_fld; 2552 } 2553 2554 if (six_byte) 2555 p += 4 + (ebd ? 8 : 0); 2556 else 2557 p += 8 + (ebd ? 8 : 0); 2558 2559 pg = scsicmd[2] & 0x3f; 2560 spg = scsicmd[3]; 2561 /* 2562 * No mode subpages supported (yet) but asking for _all_ 2563 * subpages may be valid 2564 */ 2565 if (spg && (spg != ALL_SUB_MPAGES)) { 2566 fp = 3; 2567 goto invalid_fld; 2568 } 2569 2570 switch(pg) { 2571 case RW_RECOVERY_MPAGE: 2572 p += ata_msense_rw_recovery(p, page_control == 1); 2573 break; 2574 2575 case CACHE_MPAGE: 2576 p += ata_msense_caching(args->id, p, page_control == 1); 2577 break; 2578 2579 case CONTROL_MPAGE: 2580 p += ata_msense_control(args->dev, p, page_control == 1); 2581 break; 2582 2583 case ALL_MPAGES: 2584 p += ata_msense_rw_recovery(p, page_control == 1); 2585 p += ata_msense_caching(args->id, p, page_control == 1); 2586 p += ata_msense_control(args->dev, p, page_control == 1); 2587 break; 2588 2589 default: /* invalid page code */ 2590 fp = 2; 2591 goto invalid_fld; 2592 } 2593 2594 dpofua = 0; 2595 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2596 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2597 dpofua = 1 << 4; 2598 2599 if (six_byte) { 2600 rbuf[0] = p - rbuf - 1; 2601 rbuf[2] |= dpofua; 2602 if (ebd) { 2603 rbuf[3] = sizeof(sat_blk_desc); 2604 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); 2605 } 2606 } else { 2607 unsigned int output_len = p - rbuf - 2; 2608 2609 rbuf[0] = output_len >> 8; 2610 rbuf[1] = output_len; 2611 rbuf[3] |= dpofua; 2612 if (ebd) { 2613 rbuf[7] = sizeof(sat_blk_desc); 2614 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); 2615 } 2616 } 2617 return 0; 2618 2619 invalid_fld: 2620 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); 2621 return 1; 2622 2623 saving_not_supp: 2624 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2625 /* "Saving parameters not supported" */ 2626 return 1; 2627 } 2628 2629 /** 2630 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2631 * @args: device IDENTIFY data / SCSI command of interest. 2632 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2633 * 2634 * Simulate READ CAPACITY commands. 2635 * 2636 * LOCKING: 2637 * None. 2638 */ 2639 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) 2640 { 2641 struct ata_device *dev = args->dev; 2642 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ 2643 u32 sector_size; /* physical sector size in bytes */ 2644 u8 log2_per_phys; 2645 u16 lowest_aligned; 2646 2647 sector_size = ata_id_logical_sector_size(dev->id); 2648 log2_per_phys = ata_id_log2_per_physical_sector(dev->id); 2649 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); 2650 2651 VPRINTK("ENTER\n"); 2652 2653 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2654 if (last_lba >= 0xffffffffULL) 2655 last_lba = 0xffffffff; 2656 2657 /* sector count, 32-bit */ 2658 rbuf[0] = last_lba >> (8 * 3); 2659 rbuf[1] = last_lba >> (8 * 2); 2660 rbuf[2] = last_lba >> (8 * 1); 2661 rbuf[3] = last_lba; 2662 2663 /* sector size */ 2664 rbuf[4] = sector_size >> (8 * 3); 2665 rbuf[5] = sector_size >> (8 * 2); 2666 rbuf[6] = sector_size >> (8 * 1); 2667 rbuf[7] = sector_size; 2668 } else { 2669 /* sector count, 64-bit */ 2670 rbuf[0] = last_lba >> (8 * 7); 2671 rbuf[1] = last_lba >> (8 * 6); 2672 rbuf[2] = last_lba >> (8 * 5); 2673 rbuf[3] = last_lba >> (8 * 4); 2674 rbuf[4] = last_lba >> (8 * 3); 2675 rbuf[5] = last_lba >> (8 * 2); 2676 rbuf[6] = last_lba >> (8 * 1); 2677 rbuf[7] = last_lba; 2678 2679 /* sector size */ 2680 rbuf[ 8] = sector_size >> (8 * 3); 2681 rbuf[ 9] = sector_size >> (8 * 2); 2682 rbuf[10] = sector_size >> (8 * 1); 2683 rbuf[11] = sector_size; 2684 2685 rbuf[12] = 0; 2686 rbuf[13] = log2_per_phys; 2687 rbuf[14] = (lowest_aligned >> 8) & 0x3f; 2688 rbuf[15] = lowest_aligned; 2689 2690 if (ata_id_has_trim(args->id) && 2691 !(dev->horkage & ATA_HORKAGE_NOTRIM)) { 2692 rbuf[14] |= 0x80; /* LBPME */ 2693 2694 if (ata_id_has_zero_after_trim(args->id) && 2695 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { 2696 ata_dev_info(dev, "Enabling discard_zeroes_data\n"); 2697 rbuf[14] |= 0x40; /* LBPRZ */ 2698 } 2699 } 2700 if (ata_id_zoned_cap(args->id) || 2701 args->dev->class == ATA_DEV_ZAC) 2702 rbuf[12] = (1 << 4); /* RC_BASIS */ 2703 } 2704 return 0; 2705 } 2706 2707 /** 2708 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2709 * @args: device IDENTIFY data / SCSI command of interest. 2710 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2711 * 2712 * Simulate REPORT LUNS command. 2713 * 2714 * LOCKING: 2715 * spin_lock_irqsave(host lock) 2716 */ 2717 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) 2718 { 2719 VPRINTK("ENTER\n"); 2720 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2721 2722 return 0; 2723 } 2724 2725 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2726 { 2727 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2728 /* FIXME: not quite right; we don't want the 2729 * translation of taskfile registers into 2730 * a sense descriptors, since that's only 2731 * correct for ATA, not ATAPI 2732 */ 2733 ata_gen_passthru_sense(qc); 2734 } 2735 2736 ata_qc_done(qc); 2737 } 2738 2739 /* is it pointless to prefer PIO for "safety reasons"? */ 2740 static inline int ata_pio_use_silly(struct ata_port *ap) 2741 { 2742 return (ap->flags & ATA_FLAG_PIO_DMA); 2743 } 2744 2745 static void atapi_request_sense(struct ata_queued_cmd *qc) 2746 { 2747 struct ata_port *ap = qc->ap; 2748 struct scsi_cmnd *cmd = qc->scsicmd; 2749 2750 DPRINTK("ATAPI request sense\n"); 2751 2752 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2753 2754 #ifdef CONFIG_ATA_SFF 2755 if (ap->ops->sff_tf_read) 2756 ap->ops->sff_tf_read(ap, &qc->tf); 2757 #endif 2758 2759 /* fill these in, for the case where they are -not- overwritten */ 2760 cmd->sense_buffer[0] = 0x70; 2761 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2762 2763 ata_qc_reinit(qc); 2764 2765 /* setup sg table and init transfer direction */ 2766 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); 2767 ata_sg_init(qc, &qc->sgent, 1); 2768 qc->dma_dir = DMA_FROM_DEVICE; 2769 2770 memset(&qc->cdb, 0, qc->dev->cdb_len); 2771 qc->cdb[0] = REQUEST_SENSE; 2772 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2773 2774 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2775 qc->tf.command = ATA_CMD_PACKET; 2776 2777 if (ata_pio_use_silly(ap)) { 2778 qc->tf.protocol = ATAPI_PROT_DMA; 2779 qc->tf.feature |= ATAPI_PKT_DMA; 2780 } else { 2781 qc->tf.protocol = ATAPI_PROT_PIO; 2782 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; 2783 qc->tf.lbah = 0; 2784 } 2785 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2786 2787 qc->complete_fn = atapi_sense_complete; 2788 2789 ata_qc_issue(qc); 2790 2791 DPRINTK("EXIT\n"); 2792 } 2793 2794 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2795 { 2796 struct scsi_cmnd *cmd = qc->scsicmd; 2797 unsigned int err_mask = qc->err_mask; 2798 2799 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2800 2801 /* handle completion from new EH */ 2802 if (unlikely(qc->ap->ops->error_handler && 2803 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2804 2805 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2806 /* FIXME: not quite right; we don't want the 2807 * translation of taskfile registers into a 2808 * sense descriptors, since that's only 2809 * correct for ATA, not ATAPI 2810 */ 2811 ata_gen_passthru_sense(qc); 2812 } 2813 2814 /* SCSI EH automatically locks door if sdev->locked is 2815 * set. Sometimes door lock request continues to 2816 * fail, for example, when no media is present. This 2817 * creates a loop - SCSI EH issues door lock which 2818 * fails and gets invoked again to acquire sense data 2819 * for the failed command. 2820 * 2821 * If door lock fails, always clear sdev->locked to 2822 * avoid this infinite loop. 2823 * 2824 * This may happen before SCSI scan is complete. Make 2825 * sure qc->dev->sdev isn't NULL before dereferencing. 2826 */ 2827 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev) 2828 qc->dev->sdev->locked = 0; 2829 2830 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2831 ata_qc_done(qc); 2832 return; 2833 } 2834 2835 /* successful completion or old EH failure path */ 2836 if (unlikely(err_mask & AC_ERR_DEV)) { 2837 cmd->result = SAM_STAT_CHECK_CONDITION; 2838 atapi_request_sense(qc); 2839 return; 2840 } else if (unlikely(err_mask)) { 2841 /* FIXME: not quite right; we don't want the 2842 * translation of taskfile registers into 2843 * a sense descriptors, since that's only 2844 * correct for ATA, not ATAPI 2845 */ 2846 ata_gen_passthru_sense(qc); 2847 } else { 2848 u8 *scsicmd = cmd->cmnd; 2849 2850 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { 2851 unsigned long flags; 2852 u8 *buf; 2853 2854 buf = ata_scsi_rbuf_get(cmd, true, &flags); 2855 2856 /* ATAPI devices typically report zero for their SCSI version, 2857 * and sometimes deviate from the spec WRT response data 2858 * format. If SCSI version is reported as zero like normal, 2859 * then we make the following fixups: 1) Fake MMC-5 version, 2860 * to indicate to the Linux scsi midlayer this is a modern 2861 * device. 2) Ensure response data format / ATAPI information 2862 * are always correct. 2863 */ 2864 if (buf[2] == 0) { 2865 buf[2] = 0x5; 2866 buf[3] = 0x32; 2867 } 2868 2869 ata_scsi_rbuf_put(cmd, true, &flags); 2870 } 2871 2872 cmd->result = SAM_STAT_GOOD; 2873 } 2874 2875 ata_qc_done(qc); 2876 } 2877 /** 2878 * atapi_xlat - Initialize PACKET taskfile 2879 * @qc: command structure to be initialized 2880 * 2881 * LOCKING: 2882 * spin_lock_irqsave(host lock) 2883 * 2884 * RETURNS: 2885 * Zero on success, non-zero on failure. 2886 */ 2887 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2888 { 2889 struct scsi_cmnd *scmd = qc->scsicmd; 2890 struct ata_device *dev = qc->dev; 2891 int nodata = (scmd->sc_data_direction == DMA_NONE); 2892 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO); 2893 unsigned int nbytes; 2894 2895 memset(qc->cdb, 0, dev->cdb_len); 2896 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2897 2898 qc->complete_fn = atapi_qc_complete; 2899 2900 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2901 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2902 qc->tf.flags |= ATA_TFLAG_WRITE; 2903 DPRINTK("direction: write\n"); 2904 } 2905 2906 qc->tf.command = ATA_CMD_PACKET; 2907 ata_qc_set_pc_nbytes(qc); 2908 2909 /* check whether ATAPI DMA is safe */ 2910 if (!nodata && !using_pio && atapi_check_dma(qc)) 2911 using_pio = 1; 2912 2913 /* Some controller variants snoop this value for Packet 2914 * transfers to do state machine and FIFO management. Thus we 2915 * want to set it properly, and for DMA where it is 2916 * effectively meaningless. 2917 */ 2918 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024); 2919 2920 /* Most ATAPI devices which honor transfer chunk size don't 2921 * behave according to the spec when odd chunk size which 2922 * matches the transfer length is specified. If the number of 2923 * bytes to transfer is 2n+1. According to the spec, what 2924 * should happen is to indicate that 2n+1 is going to be 2925 * transferred and transfer 2n+2 bytes where the last byte is 2926 * padding. 2927 * 2928 * In practice, this doesn't happen. ATAPI devices first 2929 * indicate and transfer 2n bytes and then indicate and 2930 * transfer 2 bytes where the last byte is padding. 2931 * 2932 * This inconsistency confuses several controllers which 2933 * perform PIO using DMA such as Intel AHCIs and sil3124/32. 2934 * These controllers use actual number of transferred bytes to 2935 * update DMA poitner and transfer of 4n+2 bytes make those 2936 * controller push DMA pointer by 4n+4 bytes because SATA data 2937 * FISes are aligned to 4 bytes. This causes data corruption 2938 * and buffer overrun. 2939 * 2940 * Always setting nbytes to even number solves this problem 2941 * because then ATAPI devices don't have to split data at 2n 2942 * boundaries. 2943 */ 2944 if (nbytes & 0x1) 2945 nbytes++; 2946 2947 qc->tf.lbam = (nbytes & 0xFF); 2948 qc->tf.lbah = (nbytes >> 8); 2949 2950 if (nodata) 2951 qc->tf.protocol = ATAPI_PROT_NODATA; 2952 else if (using_pio) 2953 qc->tf.protocol = ATAPI_PROT_PIO; 2954 else { 2955 /* DMA data xfer */ 2956 qc->tf.protocol = ATAPI_PROT_DMA; 2957 qc->tf.feature |= ATAPI_PKT_DMA; 2958 2959 if ((dev->flags & ATA_DFLAG_DMADIR) && 2960 (scmd->sc_data_direction != DMA_TO_DEVICE)) 2961 /* some SATA bridges need us to indicate data xfer direction */ 2962 qc->tf.feature |= ATAPI_DMADIR; 2963 } 2964 2965 2966 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE 2967 as ATAPI tape drives don't get this right otherwise */ 2968 return 0; 2969 } 2970 2971 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) 2972 { 2973 if (!sata_pmp_attached(ap)) { 2974 if (likely(devno < ata_link_max_devices(&ap->link))) 2975 return &ap->link.device[devno]; 2976 } else { 2977 if (likely(devno < ap->nr_pmp_links)) 2978 return &ap->pmp_link[devno].device[0]; 2979 } 2980 2981 return NULL; 2982 } 2983 2984 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, 2985 const struct scsi_device *scsidev) 2986 { 2987 int devno; 2988 2989 /* skip commands not addressed to targets we simulate */ 2990 if (!sata_pmp_attached(ap)) { 2991 if (unlikely(scsidev->channel || scsidev->lun)) 2992 return NULL; 2993 devno = scsidev->id; 2994 } else { 2995 if (unlikely(scsidev->id || scsidev->lun)) 2996 return NULL; 2997 devno = scsidev->channel; 2998 } 2999 3000 return ata_find_dev(ap, devno); 3001 } 3002 3003 /** 3004 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 3005 * @ap: ATA port to which the device is attached 3006 * @scsidev: SCSI device from which we derive the ATA device 3007 * 3008 * Given various information provided in struct scsi_cmnd, 3009 * map that onto an ATA bus, and using that mapping 3010 * determine which ata_device is associated with the 3011 * SCSI command to be sent. 3012 * 3013 * LOCKING: 3014 * spin_lock_irqsave(host lock) 3015 * 3016 * RETURNS: 3017 * Associated ATA device, or %NULL if not found. 3018 */ 3019 static struct ata_device * 3020 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 3021 { 3022 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 3023 3024 if (unlikely(!dev || !ata_dev_enabled(dev))) 3025 return NULL; 3026 3027 return dev; 3028 } 3029 3030 /* 3031 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 3032 * @byte1: Byte 1 from pass-thru CDB. 3033 * 3034 * RETURNS: 3035 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 3036 */ 3037 static u8 3038 ata_scsi_map_proto(u8 byte1) 3039 { 3040 switch((byte1 & 0x1e) >> 1) { 3041 case 3: /* Non-data */ 3042 return ATA_PROT_NODATA; 3043 3044 case 6: /* DMA */ 3045 case 10: /* UDMA Data-in */ 3046 case 11: /* UDMA Data-Out */ 3047 return ATA_PROT_DMA; 3048 3049 case 4: /* PIO Data-in */ 3050 case 5: /* PIO Data-out */ 3051 return ATA_PROT_PIO; 3052 3053 case 12: /* FPDMA */ 3054 return ATA_PROT_NCQ; 3055 3056 case 0: /* Hard Reset */ 3057 case 1: /* SRST */ 3058 case 8: /* Device Diagnostic */ 3059 case 9: /* Device Reset */ 3060 case 7: /* DMA Queued */ 3061 case 15: /* Return Response Info */ 3062 default: /* Reserved */ 3063 break; 3064 } 3065 3066 return ATA_PROT_UNKNOWN; 3067 } 3068 3069 /** 3070 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 3071 * @qc: command structure to be initialized 3072 * 3073 * Handles either 12 or 16-byte versions of the CDB. 3074 * 3075 * RETURNS: 3076 * Zero on success, non-zero on failure. 3077 */ 3078 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 3079 { 3080 struct ata_taskfile *tf = &(qc->tf); 3081 struct scsi_cmnd *scmd = qc->scsicmd; 3082 struct ata_device *dev = qc->dev; 3083 const u8 *cdb = scmd->cmnd; 3084 u16 fp; 3085 3086 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) { 3087 fp = 1; 3088 goto invalid_fld; 3089 } 3090 3091 if (ata_is_ncq(tf->protocol) && (cdb[2] & 0x3) == 0) 3092 tf->protocol = ATA_PROT_NCQ_NODATA; 3093 3094 /* enable LBA */ 3095 tf->flags |= ATA_TFLAG_LBA; 3096 3097 /* 3098 * 12 and 16 byte CDBs use different offsets to 3099 * provide the various register values. 3100 */ 3101 if (cdb[0] == ATA_16) { 3102 /* 3103 * 16-byte CDB - may contain extended commands. 3104 * 3105 * If that is the case, copy the upper byte register values. 3106 */ 3107 if (cdb[1] & 0x01) { 3108 tf->hob_feature = cdb[3]; 3109 tf->hob_nsect = cdb[5]; 3110 tf->hob_lbal = cdb[7]; 3111 tf->hob_lbam = cdb[9]; 3112 tf->hob_lbah = cdb[11]; 3113 tf->flags |= ATA_TFLAG_LBA48; 3114 } else 3115 tf->flags &= ~ATA_TFLAG_LBA48; 3116 3117 /* 3118 * Always copy low byte, device and command registers. 3119 */ 3120 tf->feature = cdb[4]; 3121 tf->nsect = cdb[6]; 3122 tf->lbal = cdb[8]; 3123 tf->lbam = cdb[10]; 3124 tf->lbah = cdb[12]; 3125 tf->device = cdb[13]; 3126 tf->command = cdb[14]; 3127 } else { 3128 /* 3129 * 12-byte CDB - incapable of extended commands. 3130 */ 3131 tf->flags &= ~ATA_TFLAG_LBA48; 3132 3133 tf->feature = cdb[3]; 3134 tf->nsect = cdb[4]; 3135 tf->lbal = cdb[5]; 3136 tf->lbam = cdb[6]; 3137 tf->lbah = cdb[7]; 3138 tf->device = cdb[8]; 3139 tf->command = cdb[9]; 3140 } 3141 3142 /* For NCQ commands copy the tag value */ 3143 if (ata_is_ncq(tf->protocol)) 3144 tf->nsect = qc->tag << 3; 3145 3146 /* enforce correct master/slave bit */ 3147 tf->device = dev->devno ? 3148 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 3149 3150 switch (tf->command) { 3151 /* READ/WRITE LONG use a non-standard sect_size */ 3152 case ATA_CMD_READ_LONG: 3153 case ATA_CMD_READ_LONG_ONCE: 3154 case ATA_CMD_WRITE_LONG: 3155 case ATA_CMD_WRITE_LONG_ONCE: 3156 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) { 3157 fp = 1; 3158 goto invalid_fld; 3159 } 3160 qc->sect_size = scsi_bufflen(scmd); 3161 break; 3162 3163 /* commands using reported Logical Block size (e.g. 512 or 4K) */ 3164 case ATA_CMD_CFA_WRITE_NE: 3165 case ATA_CMD_CFA_TRANS_SECT: 3166 case ATA_CMD_CFA_WRITE_MULT_NE: 3167 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */ 3168 case ATA_CMD_READ: 3169 case ATA_CMD_READ_EXT: 3170 case ATA_CMD_READ_QUEUED: 3171 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */ 3172 case ATA_CMD_FPDMA_READ: 3173 case ATA_CMD_READ_MULTI: 3174 case ATA_CMD_READ_MULTI_EXT: 3175 case ATA_CMD_PIO_READ: 3176 case ATA_CMD_PIO_READ_EXT: 3177 case ATA_CMD_READ_STREAM_DMA_EXT: 3178 case ATA_CMD_READ_STREAM_EXT: 3179 case ATA_CMD_VERIFY: 3180 case ATA_CMD_VERIFY_EXT: 3181 case ATA_CMD_WRITE: 3182 case ATA_CMD_WRITE_EXT: 3183 case ATA_CMD_WRITE_FUA_EXT: 3184 case ATA_CMD_WRITE_QUEUED: 3185 case ATA_CMD_WRITE_QUEUED_FUA_EXT: 3186 case ATA_CMD_FPDMA_WRITE: 3187 case ATA_CMD_WRITE_MULTI: 3188 case ATA_CMD_WRITE_MULTI_EXT: 3189 case ATA_CMD_WRITE_MULTI_FUA_EXT: 3190 case ATA_CMD_PIO_WRITE: 3191 case ATA_CMD_PIO_WRITE_EXT: 3192 case ATA_CMD_WRITE_STREAM_DMA_EXT: 3193 case ATA_CMD_WRITE_STREAM_EXT: 3194 qc->sect_size = scmd->device->sector_size; 3195 break; 3196 3197 /* Everything else uses 512 byte "sectors" */ 3198 default: 3199 qc->sect_size = ATA_SECT_SIZE; 3200 } 3201 3202 /* 3203 * Set flags so that all registers will be written, pass on 3204 * write indication (used for PIO/DMA setup), result TF is 3205 * copied back and we don't whine too much about its failure. 3206 */ 3207 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 3208 if (scmd->sc_data_direction == DMA_TO_DEVICE) 3209 tf->flags |= ATA_TFLAG_WRITE; 3210 3211 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET; 3212 3213 /* 3214 * Set transfer length. 3215 * 3216 * TODO: find out if we need to do more here to 3217 * cover scatter/gather case. 3218 */ 3219 ata_qc_set_pc_nbytes(qc); 3220 3221 /* We may not issue DMA commands if no DMA mode is set */ 3222 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { 3223 fp = 1; 3224 goto invalid_fld; 3225 } 3226 3227 /* sanity check for pio multi commands */ 3228 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) { 3229 fp = 1; 3230 goto invalid_fld; 3231 } 3232 3233 if (is_multi_taskfile(tf)) { 3234 unsigned int multi_count = 1 << (cdb[1] >> 5); 3235 3236 /* compare the passed through multi_count 3237 * with the cached multi_count of libata 3238 */ 3239 if (multi_count != dev->multi_count) 3240 ata_dev_warn(dev, "invalid multi_count %u ignored\n", 3241 multi_count); 3242 } 3243 3244 /* 3245 * Filter SET_FEATURES - XFER MODE command -- otherwise, 3246 * SET_FEATURES - XFER MODE must be preceded/succeeded 3247 * by an update to hardware-specific registers for each 3248 * controller (i.e. the reason for ->set_piomode(), 3249 * ->set_dmamode(), and ->post_set_mode() hooks). 3250 */ 3251 if (tf->command == ATA_CMD_SET_FEATURES && 3252 tf->feature == SETFEATURES_XFER) { 3253 fp = (cdb[0] == ATA_16) ? 4 : 3; 3254 goto invalid_fld; 3255 } 3256 3257 /* 3258 * Filter TPM commands by default. These provide an 3259 * essentially uncontrolled encrypted "back door" between 3260 * applications and the disk. Set libata.allow_tpm=1 if you 3261 * have a real reason for wanting to use them. This ensures 3262 * that installed software cannot easily mess stuff up without 3263 * user intent. DVR type users will probably ship with this enabled 3264 * for movie content management. 3265 * 3266 * Note that for ATA8 we can issue a DCS change and DCS freeze lock 3267 * for this and should do in future but that it is not sufficient as 3268 * DCS is an optional feature set. Thus we also do the software filter 3269 * so that we comply with the TC consortium stated goal that the user 3270 * can turn off TC features of their system. 3271 */ 3272 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) { 3273 fp = (cdb[0] == ATA_16) ? 14 : 9; 3274 goto invalid_fld; 3275 } 3276 3277 return 0; 3278 3279 invalid_fld: 3280 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff); 3281 return 1; 3282 } 3283 3284 /** 3285 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim 3286 * @cmd: SCSI command being translated 3287 * @trmax: Maximum number of entries that will fit in sector_size bytes. 3288 * @sector: Starting sector 3289 * @count: Total Range of request in logical sectors 3290 * 3291 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted 3292 * descriptor. 3293 * 3294 * Upto 64 entries of the format: 3295 * 63:48 Range Length 3296 * 47:0 LBA 3297 * 3298 * Range Length of 0 is ignored. 3299 * LBA's should be sorted order and not overlap. 3300 * 3301 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET 3302 * 3303 * Return: Number of bytes copied into sglist. 3304 */ 3305 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax, 3306 u64 sector, u32 count) 3307 { 3308 struct scsi_device *sdp = cmd->device; 3309 size_t len = sdp->sector_size; 3310 size_t r; 3311 __le64 *buf; 3312 u32 i = 0; 3313 unsigned long flags; 3314 3315 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3316 3317 if (len > ATA_SCSI_RBUF_SIZE) 3318 len = ATA_SCSI_RBUF_SIZE; 3319 3320 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3321 buf = ((void *)ata_scsi_rbuf); 3322 memset(buf, 0, len); 3323 while (i < trmax) { 3324 u64 entry = sector | 3325 ((u64)(count > 0xffff ? 0xffff : count) << 48); 3326 buf[i++] = __cpu_to_le64(entry); 3327 if (count <= 0xffff) 3328 break; 3329 count -= 0xffff; 3330 sector += 0xffff; 3331 } 3332 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3333 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3334 3335 return r; 3336 } 3337 3338 /** 3339 * ata_format_dsm_trim_descr() - SATL Write Same to ATA SCT Write Same 3340 * @cmd: SCSI command being translated 3341 * @lba: Starting sector 3342 * @num: Number of sectors to be zero'd. 3343 * 3344 * Rewrite the WRITE SAME payload to be an SCT Write Same formatted 3345 * descriptor. 3346 * NOTE: Writes a pattern (0's) in the foreground. 3347 * 3348 * Return: Number of bytes copied into sglist. 3349 */ 3350 static size_t ata_format_sct_write_same(struct scsi_cmnd *cmd, u64 lba, u64 num) 3351 { 3352 struct scsi_device *sdp = cmd->device; 3353 size_t len = sdp->sector_size; 3354 size_t r; 3355 u16 *buf; 3356 unsigned long flags; 3357 3358 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); 3359 buf = ((void *)ata_scsi_rbuf); 3360 3361 put_unaligned_le16(0x0002, &buf[0]); /* SCT_ACT_WRITE_SAME */ 3362 put_unaligned_le16(0x0101, &buf[1]); /* WRITE PTRN FG */ 3363 put_unaligned_le64(lba, &buf[2]); 3364 put_unaligned_le64(num, &buf[6]); 3365 put_unaligned_le32(0u, &buf[10]); /* pattern */ 3366 3367 WARN_ON(len > ATA_SCSI_RBUF_SIZE); 3368 3369 if (len > ATA_SCSI_RBUF_SIZE) 3370 len = ATA_SCSI_RBUF_SIZE; 3371 3372 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len); 3373 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); 3374 3375 return r; 3376 } 3377 3378 /** 3379 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same 3380 * @qc: Command to be translated 3381 * 3382 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or 3383 * an SCT Write Same command. 3384 * Based on WRITE SAME has the UNMAP flag 3385 * When set translate to DSM TRIM 3386 * When clear translate to SCT Write Same 3387 */ 3388 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) 3389 { 3390 struct ata_taskfile *tf = &qc->tf; 3391 struct scsi_cmnd *scmd = qc->scsicmd; 3392 struct scsi_device *sdp = scmd->device; 3393 size_t len = sdp->sector_size; 3394 struct ata_device *dev = qc->dev; 3395 const u8 *cdb = scmd->cmnd; 3396 u64 block; 3397 u32 n_block; 3398 const u32 trmax = len >> 3; 3399 u32 size; 3400 u16 fp; 3401 u8 bp = 0xff; 3402 u8 unmap = cdb[1] & 0x8; 3403 3404 /* we may not issue DMA commands if no DMA mode is set */ 3405 if (unlikely(!dev->dma_mode)) 3406 goto invalid_opcode; 3407 3408 if (unlikely(scmd->cmd_len < 16)) { 3409 fp = 15; 3410 goto invalid_fld; 3411 } 3412 scsi_16_lba_len(cdb, &block, &n_block); 3413 3414 if (unmap) { 3415 /* If trim is not enabled the cmd is invalid. */ 3416 if ((dev->horkage & ATA_HORKAGE_NOTRIM) || 3417 !ata_id_has_trim(dev->id)) { 3418 fp = 1; 3419 bp = 3; 3420 goto invalid_fld; 3421 } 3422 /* If the request is too large the cmd is invalid */ 3423 if (n_block > 0xffff * trmax) { 3424 fp = 2; 3425 goto invalid_fld; 3426 } 3427 } else { 3428 /* If write same is not available the cmd is invalid */ 3429 if (!ata_id_sct_write_same(dev->id)) { 3430 fp = 1; 3431 bp = 3; 3432 goto invalid_fld; 3433 } 3434 } 3435 3436 /* 3437 * WRITE SAME always has a sector sized buffer as payload, this 3438 * should never be a multiple entry S/G list. 3439 */ 3440 if (!scsi_sg_count(scmd)) 3441 goto invalid_param_len; 3442 3443 /* 3444 * size must match sector size in bytes 3445 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count) 3446 * is defined as number of 512 byte blocks to be transferred. 3447 */ 3448 if (unmap) { 3449 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); 3450 if (size != len) 3451 goto invalid_param_len; 3452 3453 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) { 3454 /* Newer devices support queued TRIM commands */ 3455 tf->protocol = ATA_PROT_NCQ; 3456 tf->command = ATA_CMD_FPDMA_SEND; 3457 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; 3458 tf->nsect = qc->tag << 3; 3459 tf->hob_feature = (size / 512) >> 8; 3460 tf->feature = size / 512; 3461 3462 tf->auxiliary = 1; 3463 } else { 3464 tf->protocol = ATA_PROT_DMA; 3465 tf->hob_feature = 0; 3466 tf->feature = ATA_DSM_TRIM; 3467 tf->hob_nsect = (size / 512) >> 8; 3468 tf->nsect = size / 512; 3469 tf->command = ATA_CMD_DSM; 3470 } 3471 } else { 3472 size = ata_format_sct_write_same(scmd, block, n_block); 3473 if (size != len) 3474 goto invalid_param_len; 3475 3476 tf->hob_feature = 0; 3477 tf->feature = 0; 3478 tf->hob_nsect = 0; 3479 tf->nsect = 1; 3480 tf->lbah = 0; 3481 tf->lbam = 0; 3482 tf->lbal = ATA_CMD_STANDBYNOW1; 3483 tf->hob_lbah = 0; 3484 tf->hob_lbam = 0; 3485 tf->hob_lbal = 0; 3486 tf->device = ATA_CMD_STANDBYNOW1; 3487 tf->protocol = ATA_PROT_DMA; 3488 tf->command = ATA_CMD_WRITE_LOG_DMA_EXT; 3489 if (unlikely(dev->flags & ATA_DFLAG_PIO)) 3490 tf->command = ATA_CMD_WRITE_LOG_EXT; 3491 } 3492 3493 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | 3494 ATA_TFLAG_WRITE; 3495 3496 ata_qc_set_pc_nbytes(qc); 3497 3498 return 0; 3499 3500 invalid_fld: 3501 ata_scsi_set_invalid_field(dev, scmd, fp, bp); 3502 return 1; 3503 invalid_param_len: 3504 /* "Parameter list length error" */ 3505 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3506 return 1; 3507 invalid_opcode: 3508 /* "Invalid command operation code" */ 3509 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0); 3510 return 1; 3511 } 3512 3513 /** 3514 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN 3515 * @args: device MAINTENANCE_IN data / SCSI command of interest. 3516 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 3517 * 3518 * Yields a subset to satisfy scsi_report_opcode() 3519 * 3520 * LOCKING: 3521 * spin_lock_irqsave(host lock) 3522 */ 3523 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) 3524 { 3525 struct ata_device *dev = args->dev; 3526 u8 *cdb = args->cmd->cmnd; 3527 u8 supported = 0; 3528 unsigned int err = 0; 3529 3530 if (cdb[2] != 1) { 3531 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); 3532 err = 2; 3533 goto out; 3534 } 3535 switch (cdb[3]) { 3536 case INQUIRY: 3537 case MODE_SENSE: 3538 case MODE_SENSE_10: 3539 case READ_CAPACITY: 3540 case SERVICE_ACTION_IN_16: 3541 case REPORT_LUNS: 3542 case REQUEST_SENSE: 3543 case SYNCHRONIZE_CACHE: 3544 case REZERO_UNIT: 3545 case SEEK_6: 3546 case SEEK_10: 3547 case TEST_UNIT_READY: 3548 case SEND_DIAGNOSTIC: 3549 case MAINTENANCE_IN: 3550 case READ_6: 3551 case READ_10: 3552 case READ_16: 3553 case WRITE_6: 3554 case WRITE_10: 3555 case WRITE_16: 3556 case ATA_12: 3557 case ATA_16: 3558 case VERIFY: 3559 case VERIFY_16: 3560 case MODE_SELECT: 3561 case MODE_SELECT_10: 3562 case START_STOP: 3563 supported = 3; 3564 break; 3565 case WRITE_SAME_16: 3566 if (!ata_id_sct_write_same(dev->id)) 3567 break; 3568 /* fallthrough: if SCT ... only enable for ZBC */ 3569 case ZBC_IN: 3570 case ZBC_OUT: 3571 if (ata_id_zoned_cap(dev->id) || 3572 dev->class == ATA_DEV_ZAC) 3573 supported = 3; 3574 break; 3575 default: 3576 break; 3577 } 3578 out: 3579 rbuf[1] = supported; /* supported */ 3580 return err; 3581 } 3582 3583 /** 3584 * ata_scsi_report_zones_complete - convert ATA output 3585 * @qc: command structure returning the data 3586 * 3587 * Convert T-13 little-endian field representation into 3588 * T-10 big-endian field representation. 3589 * What a mess. 3590 */ 3591 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc) 3592 { 3593 struct scsi_cmnd *scmd = qc->scsicmd; 3594 struct sg_mapping_iter miter; 3595 unsigned long flags; 3596 unsigned int bytes = 0; 3597 3598 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd), 3599 SG_MITER_TO_SG | SG_MITER_ATOMIC); 3600 3601 local_irq_save(flags); 3602 while (sg_miter_next(&miter)) { 3603 unsigned int offset = 0; 3604 3605 if (bytes == 0) { 3606 char *hdr; 3607 u32 list_length; 3608 u64 max_lba, opt_lba; 3609 u16 same; 3610 3611 /* Swizzle header */ 3612 hdr = miter.addr; 3613 list_length = get_unaligned_le32(&hdr[0]); 3614 same = get_unaligned_le16(&hdr[4]); 3615 max_lba = get_unaligned_le64(&hdr[8]); 3616 opt_lba = get_unaligned_le64(&hdr[16]); 3617 put_unaligned_be32(list_length, &hdr[0]); 3618 hdr[4] = same & 0xf; 3619 put_unaligned_be64(max_lba, &hdr[8]); 3620 put_unaligned_be64(opt_lba, &hdr[16]); 3621 offset += 64; 3622 bytes += 64; 3623 } 3624 while (offset < miter.length) { 3625 char *rec; 3626 u8 cond, type, non_seq, reset; 3627 u64 size, start, wp; 3628 3629 /* Swizzle zone descriptor */ 3630 rec = miter.addr + offset; 3631 type = rec[0] & 0xf; 3632 cond = (rec[1] >> 4) & 0xf; 3633 non_seq = (rec[1] & 2); 3634 reset = (rec[1] & 1); 3635 size = get_unaligned_le64(&rec[8]); 3636 start = get_unaligned_le64(&rec[16]); 3637 wp = get_unaligned_le64(&rec[24]); 3638 rec[0] = type; 3639 rec[1] = (cond << 4) | non_seq | reset; 3640 put_unaligned_be64(size, &rec[8]); 3641 put_unaligned_be64(start, &rec[16]); 3642 put_unaligned_be64(wp, &rec[24]); 3643 WARN_ON(offset + 64 > miter.length); 3644 offset += 64; 3645 bytes += 64; 3646 } 3647 } 3648 sg_miter_stop(&miter); 3649 local_irq_restore(flags); 3650 3651 ata_scsi_qc_complete(qc); 3652 } 3653 3654 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc) 3655 { 3656 struct ata_taskfile *tf = &qc->tf; 3657 struct scsi_cmnd *scmd = qc->scsicmd; 3658 const u8 *cdb = scmd->cmnd; 3659 u16 sect, fp = (u16)-1; 3660 u8 sa, options, bp = 0xff; 3661 u64 block; 3662 u32 n_block; 3663 3664 if (unlikely(scmd->cmd_len < 16)) { 3665 ata_dev_warn(qc->dev, "invalid cdb length %d\n", 3666 scmd->cmd_len); 3667 fp = 15; 3668 goto invalid_fld; 3669 } 3670 scsi_16_lba_len(cdb, &block, &n_block); 3671 if (n_block != scsi_bufflen(scmd)) { 3672 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n", 3673 n_block, scsi_bufflen(scmd)); 3674 goto invalid_param_len; 3675 } 3676 sa = cdb[1] & 0x1f; 3677 if (sa != ZI_REPORT_ZONES) { 3678 ata_dev_warn(qc->dev, "invalid service action %d\n", sa); 3679 fp = 1; 3680 goto invalid_fld; 3681 } 3682 /* 3683 * ZAC allows only for transfers in 512 byte blocks, 3684 * and uses a 16 bit value for the transfer count. 3685 */ 3686 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) { 3687 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block); 3688 goto invalid_param_len; 3689 } 3690 sect = n_block / 512; 3691 options = cdb[14] & 0xbf; 3692 3693 if (ata_ncq_enabled(qc->dev) && 3694 ata_fpdma_zac_mgmt_in_supported(qc->dev)) { 3695 tf->protocol = ATA_PROT_NCQ; 3696 tf->command = ATA_CMD_FPDMA_RECV; 3697 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f; 3698 tf->nsect = qc->tag << 3; 3699 tf->feature = sect & 0xff; 3700 tf->hob_feature = (sect >> 8) & 0xff; 3701 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8); 3702 } else { 3703 tf->command = ATA_CMD_ZAC_MGMT_IN; 3704 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES; 3705 tf->protocol = ATA_PROT_DMA; 3706 tf->hob_feature = options; 3707 tf->hob_nsect = (sect >> 8) & 0xff; 3708 tf->nsect = sect & 0xff; 3709 } 3710 tf->device = ATA_LBA; 3711 tf->lbah = (block >> 16) & 0xff; 3712 tf->lbam = (block >> 8) & 0xff; 3713 tf->lbal = block & 0xff; 3714 tf->hob_lbah = (block >> 40) & 0xff; 3715 tf->hob_lbam = (block >> 32) & 0xff; 3716 tf->hob_lbal = (block >> 24) & 0xff; 3717 3718 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3719 qc->flags |= ATA_QCFLAG_RESULT_TF; 3720 3721 ata_qc_set_pc_nbytes(qc); 3722 3723 qc->complete_fn = ata_scsi_report_zones_complete; 3724 3725 return 0; 3726 3727 invalid_fld: 3728 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 3729 return 1; 3730 3731 invalid_param_len: 3732 /* "Parameter list length error" */ 3733 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3734 return 1; 3735 } 3736 3737 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) 3738 { 3739 struct ata_taskfile *tf = &qc->tf; 3740 struct scsi_cmnd *scmd = qc->scsicmd; 3741 struct ata_device *dev = qc->dev; 3742 const u8 *cdb = scmd->cmnd; 3743 u8 all, sa; 3744 u64 block; 3745 u32 n_block; 3746 u16 fp = (u16)-1; 3747 3748 if (unlikely(scmd->cmd_len < 16)) { 3749 fp = 15; 3750 goto invalid_fld; 3751 } 3752 3753 sa = cdb[1] & 0x1f; 3754 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) && 3755 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) { 3756 fp = 1; 3757 goto invalid_fld; 3758 } 3759 3760 scsi_16_lba_len(cdb, &block, &n_block); 3761 if (n_block) { 3762 /* 3763 * ZAC MANAGEMENT OUT doesn't define any length 3764 */ 3765 goto invalid_param_len; 3766 } 3767 if (block > dev->n_sectors) 3768 goto out_of_range; 3769 3770 all = cdb[14] & 0x1; 3771 3772 if (ata_ncq_enabled(qc->dev) && 3773 ata_fpdma_zac_mgmt_out_supported(qc->dev)) { 3774 tf->protocol = ATA_PROT_NCQ_NODATA; 3775 tf->command = ATA_CMD_NCQ_NON_DATA; 3776 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT; 3777 tf->nsect = qc->tag << 3; 3778 tf->auxiliary = sa | ((u16)all << 8); 3779 } else { 3780 tf->protocol = ATA_PROT_NODATA; 3781 tf->command = ATA_CMD_ZAC_MGMT_OUT; 3782 tf->feature = sa; 3783 tf->hob_feature = all; 3784 } 3785 tf->lbah = (block >> 16) & 0xff; 3786 tf->lbam = (block >> 8) & 0xff; 3787 tf->lbal = block & 0xff; 3788 tf->hob_lbah = (block >> 40) & 0xff; 3789 tf->hob_lbam = (block >> 32) & 0xff; 3790 tf->hob_lbal = (block >> 24) & 0xff; 3791 tf->device = ATA_LBA; 3792 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; 3793 3794 return 0; 3795 3796 invalid_fld: 3797 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); 3798 return 1; 3799 out_of_range: 3800 /* "Logical Block Address out of range" */ 3801 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00); 3802 return 1; 3803 invalid_param_len: 3804 /* "Parameter list length error" */ 3805 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 3806 return 1; 3807 } 3808 3809 /** 3810 * ata_mselect_caching - Simulate MODE SELECT for caching info page 3811 * @qc: Storage for translated ATA taskfile 3812 * @buf: input buffer 3813 * @len: number of valid bytes in the input buffer 3814 * @fp: out parameter for the failed field on error 3815 * 3816 * Prepare a taskfile to modify caching information for the device. 3817 * 3818 * LOCKING: 3819 * None. 3820 */ 3821 static int ata_mselect_caching(struct ata_queued_cmd *qc, 3822 const u8 *buf, int len, u16 *fp) 3823 { 3824 struct ata_taskfile *tf = &qc->tf; 3825 struct ata_device *dev = qc->dev; 3826 u8 mpage[CACHE_MPAGE_LEN]; 3827 u8 wce; 3828 int i; 3829 3830 /* 3831 * The first two bytes of def_cache_mpage are a header, so offsets 3832 * in mpage are off by 2 compared to buf. Same for len. 3833 */ 3834 3835 if (len != CACHE_MPAGE_LEN - 2) { 3836 if (len < CACHE_MPAGE_LEN - 2) 3837 *fp = len; 3838 else 3839 *fp = CACHE_MPAGE_LEN - 2; 3840 return -EINVAL; 3841 } 3842 3843 wce = buf[0] & (1 << 2); 3844 3845 /* 3846 * Check that read-only bits are not modified. 3847 */ 3848 ata_msense_caching(dev->id, mpage, false); 3849 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) { 3850 if (i == 0) 3851 continue; 3852 if (mpage[i + 2] != buf[i]) { 3853 *fp = i; 3854 return -EINVAL; 3855 } 3856 } 3857 3858 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 3859 tf->protocol = ATA_PROT_NODATA; 3860 tf->nsect = 0; 3861 tf->command = ATA_CMD_SET_FEATURES; 3862 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF; 3863 return 0; 3864 } 3865 3866 /** 3867 * ata_mselect_control - Simulate MODE SELECT for control page 3868 * @qc: Storage for translated ATA taskfile 3869 * @buf: input buffer 3870 * @len: number of valid bytes in the input buffer 3871 * @fp: out parameter for the failed field on error 3872 * 3873 * Prepare a taskfile to modify caching information for the device. 3874 * 3875 * LOCKING: 3876 * None. 3877 */ 3878 static int ata_mselect_control(struct ata_queued_cmd *qc, 3879 const u8 *buf, int len, u16 *fp) 3880 { 3881 struct ata_device *dev = qc->dev; 3882 u8 mpage[CONTROL_MPAGE_LEN]; 3883 u8 d_sense; 3884 int i; 3885 3886 /* 3887 * The first two bytes of def_control_mpage are a header, so offsets 3888 * in mpage are off by 2 compared to buf. Same for len. 3889 */ 3890 3891 if (len != CONTROL_MPAGE_LEN - 2) { 3892 if (len < CONTROL_MPAGE_LEN - 2) 3893 *fp = len; 3894 else 3895 *fp = CONTROL_MPAGE_LEN - 2; 3896 return -EINVAL; 3897 } 3898 3899 d_sense = buf[0] & (1 << 2); 3900 3901 /* 3902 * Check that read-only bits are not modified. 3903 */ 3904 ata_msense_control(dev, mpage, false); 3905 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { 3906 if (i == 0) 3907 continue; 3908 if (mpage[2 + i] != buf[i]) { 3909 *fp = i; 3910 return -EINVAL; 3911 } 3912 } 3913 if (d_sense & (1 << 2)) 3914 dev->flags |= ATA_DFLAG_D_SENSE; 3915 else 3916 dev->flags &= ~ATA_DFLAG_D_SENSE; 3917 return 0; 3918 } 3919 3920 /** 3921 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands 3922 * @qc: Storage for translated ATA taskfile 3923 * 3924 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile. 3925 * Assume this is invoked for direct access devices (e.g. disks) only. 3926 * There should be no block descriptor for other device types. 3927 * 3928 * LOCKING: 3929 * spin_lock_irqsave(host lock) 3930 */ 3931 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) 3932 { 3933 struct scsi_cmnd *scmd = qc->scsicmd; 3934 const u8 *cdb = scmd->cmnd; 3935 const u8 *p; 3936 u8 pg, spg; 3937 unsigned six_byte, pg_len, hdr_len, bd_len; 3938 int len; 3939 u16 fp = (u16)-1; 3940 u8 bp = 0xff; 3941 3942 VPRINTK("ENTER\n"); 3943 3944 six_byte = (cdb[0] == MODE_SELECT); 3945 if (six_byte) { 3946 if (scmd->cmd_len < 5) { 3947 fp = 4; 3948 goto invalid_fld; 3949 } 3950 3951 len = cdb[4]; 3952 hdr_len = 4; 3953 } else { 3954 if (scmd->cmd_len < 9) { 3955 fp = 8; 3956 goto invalid_fld; 3957 } 3958 3959 len = (cdb[7] << 8) + cdb[8]; 3960 hdr_len = 8; 3961 } 3962 3963 /* We only support PF=1, SP=0. */ 3964 if ((cdb[1] & 0x11) != 0x10) { 3965 fp = 1; 3966 bp = (cdb[1] & 0x01) ? 1 : 5; 3967 goto invalid_fld; 3968 } 3969 3970 /* Test early for possible overrun. */ 3971 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) 3972 goto invalid_param_len; 3973 3974 p = page_address(sg_page(scsi_sglist(scmd))); 3975 3976 /* Move past header and block descriptors. */ 3977 if (len < hdr_len) 3978 goto invalid_param_len; 3979 3980 if (six_byte) 3981 bd_len = p[3]; 3982 else 3983 bd_len = (p[6] << 8) + p[7]; 3984 3985 len -= hdr_len; 3986 p += hdr_len; 3987 if (len < bd_len) 3988 goto invalid_param_len; 3989 if (bd_len != 0 && bd_len != 8) { 3990 fp = (six_byte) ? 3 : 6; 3991 fp += bd_len + hdr_len; 3992 goto invalid_param; 3993 } 3994 3995 len -= bd_len; 3996 p += bd_len; 3997 if (len == 0) 3998 goto skip; 3999 4000 /* Parse both possible formats for the mode page headers. */ 4001 pg = p[0] & 0x3f; 4002 if (p[0] & 0x40) { 4003 if (len < 4) 4004 goto invalid_param_len; 4005 4006 spg = p[1]; 4007 pg_len = (p[2] << 8) | p[3]; 4008 p += 4; 4009 len -= 4; 4010 } else { 4011 if (len < 2) 4012 goto invalid_param_len; 4013 4014 spg = 0; 4015 pg_len = p[1]; 4016 p += 2; 4017 len -= 2; 4018 } 4019 4020 /* 4021 * No mode subpages supported (yet) but asking for _all_ 4022 * subpages may be valid 4023 */ 4024 if (spg && (spg != ALL_SUB_MPAGES)) { 4025 fp = (p[0] & 0x40) ? 1 : 0; 4026 fp += hdr_len + bd_len; 4027 goto invalid_param; 4028 } 4029 if (pg_len > len) 4030 goto invalid_param_len; 4031 4032 switch (pg) { 4033 case CACHE_MPAGE: 4034 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) { 4035 fp += hdr_len + bd_len; 4036 goto invalid_param; 4037 } 4038 break; 4039 case CONTROL_MPAGE: 4040 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { 4041 fp += hdr_len + bd_len; 4042 goto invalid_param; 4043 } else { 4044 goto skip; /* No ATA command to send */ 4045 } 4046 break; 4047 default: /* invalid page code */ 4048 fp = bd_len + hdr_len; 4049 goto invalid_param; 4050 } 4051 4052 /* 4053 * Only one page has changeable data, so we only support setting one 4054 * page at a time. 4055 */ 4056 if (len > pg_len) 4057 goto invalid_param; 4058 4059 return 0; 4060 4061 invalid_fld: 4062 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); 4063 return 1; 4064 4065 invalid_param: 4066 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp); 4067 return 1; 4068 4069 invalid_param_len: 4070 /* "Parameter list length error" */ 4071 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); 4072 return 1; 4073 4074 skip: 4075 scmd->result = SAM_STAT_GOOD; 4076 return 1; 4077 } 4078 4079 /** 4080 * ata_get_xlat_func - check if SCSI to ATA translation is possible 4081 * @dev: ATA device 4082 * @cmd: SCSI command opcode to consider 4083 * 4084 * Look up the SCSI command given, and determine whether the 4085 * SCSI command is to be translated or simulated. 4086 * 4087 * RETURNS: 4088 * Pointer to translation function if possible, %NULL if not. 4089 */ 4090 4091 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 4092 { 4093 switch (cmd) { 4094 case READ_6: 4095 case READ_10: 4096 case READ_16: 4097 4098 case WRITE_6: 4099 case WRITE_10: 4100 case WRITE_16: 4101 return ata_scsi_rw_xlat; 4102 4103 case WRITE_SAME_16: 4104 return ata_scsi_write_same_xlat; 4105 4106 case SYNCHRONIZE_CACHE: 4107 if (ata_try_flush_cache(dev)) 4108 return ata_scsi_flush_xlat; 4109 break; 4110 4111 case VERIFY: 4112 case VERIFY_16: 4113 return ata_scsi_verify_xlat; 4114 4115 case ATA_12: 4116 case ATA_16: 4117 return ata_scsi_pass_thru; 4118 4119 case MODE_SELECT: 4120 case MODE_SELECT_10: 4121 return ata_scsi_mode_select_xlat; 4122 break; 4123 4124 case ZBC_IN: 4125 return ata_scsi_zbc_in_xlat; 4126 4127 case ZBC_OUT: 4128 return ata_scsi_zbc_out_xlat; 4129 4130 case START_STOP: 4131 return ata_scsi_start_stop_xlat; 4132 } 4133 4134 return NULL; 4135 } 4136 4137 /** 4138 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 4139 * @ap: ATA port to which the command was being sent 4140 * @cmd: SCSI command to dump 4141 * 4142 * Prints the contents of a SCSI command via printk(). 4143 */ 4144 4145 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 4146 struct scsi_cmnd *cmd) 4147 { 4148 #ifdef ATA_DEBUG 4149 struct scsi_device *scsidev = cmd->device; 4150 4151 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n", 4152 ap->print_id, 4153 scsidev->channel, scsidev->id, scsidev->lun, 4154 cmd->cmnd); 4155 #endif 4156 } 4157 4158 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 4159 struct ata_device *dev) 4160 { 4161 u8 scsi_op = scmd->cmnd[0]; 4162 ata_xlat_func_t xlat_func; 4163 int rc = 0; 4164 4165 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 4166 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) 4167 goto bad_cdb_len; 4168 4169 xlat_func = ata_get_xlat_func(dev, scsi_op); 4170 } else { 4171 if (unlikely(!scmd->cmd_len)) 4172 goto bad_cdb_len; 4173 4174 xlat_func = NULL; 4175 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { 4176 /* relay SCSI command to ATAPI device */ 4177 int len = COMMAND_SIZE(scsi_op); 4178 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len)) 4179 goto bad_cdb_len; 4180 4181 xlat_func = atapi_xlat; 4182 } else { 4183 /* ATA_16 passthru, treat as an ATA command */ 4184 if (unlikely(scmd->cmd_len > 16)) 4185 goto bad_cdb_len; 4186 4187 xlat_func = ata_get_xlat_func(dev, scsi_op); 4188 } 4189 } 4190 4191 if (xlat_func) 4192 rc = ata_scsi_translate(dev, scmd, xlat_func); 4193 else 4194 ata_scsi_simulate(dev, scmd); 4195 4196 return rc; 4197 4198 bad_cdb_len: 4199 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", 4200 scmd->cmd_len, scsi_op, dev->cdb_len); 4201 scmd->result = DID_ERROR << 16; 4202 scmd->scsi_done(scmd); 4203 return 0; 4204 } 4205 4206 /** 4207 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 4208 * @shost: SCSI host of command to be sent 4209 * @cmd: SCSI command to be sent 4210 * 4211 * In some cases, this function translates SCSI commands into 4212 * ATA taskfiles, and queues the taskfiles to be sent to 4213 * hardware. In other cases, this function simulates a 4214 * SCSI device by evaluating and responding to certain 4215 * SCSI commands. This creates the overall effect of 4216 * ATA and ATAPI devices appearing as SCSI devices. 4217 * 4218 * LOCKING: 4219 * ATA host lock 4220 * 4221 * RETURNS: 4222 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4223 * 0 otherwise. 4224 */ 4225 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 4226 { 4227 struct ata_port *ap; 4228 struct ata_device *dev; 4229 struct scsi_device *scsidev = cmd->device; 4230 int rc = 0; 4231 unsigned long irq_flags; 4232 4233 ap = ata_shost_to_port(shost); 4234 4235 spin_lock_irqsave(ap->lock, irq_flags); 4236 4237 ata_scsi_dump_cdb(ap, cmd); 4238 4239 dev = ata_scsi_find_dev(ap, scsidev); 4240 if (likely(dev)) 4241 rc = __ata_scsi_queuecmd(cmd, dev); 4242 else { 4243 cmd->result = (DID_BAD_TARGET << 16); 4244 cmd->scsi_done(cmd); 4245 } 4246 4247 spin_unlock_irqrestore(ap->lock, irq_flags); 4248 4249 return rc; 4250 } 4251 4252 /** 4253 * ata_scsi_simulate - simulate SCSI command on ATA device 4254 * @dev: the target device 4255 * @cmd: SCSI command being sent to device. 4256 * 4257 * Interprets and directly executes a select list of SCSI commands 4258 * that can be handled internally. 4259 * 4260 * LOCKING: 4261 * spin_lock_irqsave(host lock) 4262 */ 4263 4264 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) 4265 { 4266 struct ata_scsi_args args; 4267 const u8 *scsicmd = cmd->cmnd; 4268 u8 tmp8; 4269 4270 args.dev = dev; 4271 args.id = dev->id; 4272 args.cmd = cmd; 4273 args.done = cmd->scsi_done; 4274 4275 switch(scsicmd[0]) { 4276 case INQUIRY: 4277 if (scsicmd[1] & 2) /* is CmdDt set? */ 4278 ata_scsi_invalid_field(dev, cmd, 1); 4279 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 4280 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 4281 else switch (scsicmd[2]) { 4282 case 0x00: 4283 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 4284 break; 4285 case 0x80: 4286 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 4287 break; 4288 case 0x83: 4289 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 4290 break; 4291 case 0x89: 4292 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); 4293 break; 4294 case 0xb0: 4295 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); 4296 break; 4297 case 0xb1: 4298 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); 4299 break; 4300 case 0xb2: 4301 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); 4302 break; 4303 case 0xb6: 4304 if (dev->flags & ATA_DFLAG_ZAC) { 4305 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); 4306 break; 4307 } 4308 /* Fallthrough */ 4309 default: 4310 ata_scsi_invalid_field(dev, cmd, 2); 4311 break; 4312 } 4313 break; 4314 4315 case MODE_SENSE: 4316 case MODE_SENSE_10: 4317 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 4318 break; 4319 4320 case READ_CAPACITY: 4321 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4322 break; 4323 4324 case SERVICE_ACTION_IN_16: 4325 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 4326 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 4327 else 4328 ata_scsi_invalid_field(dev, cmd, 1); 4329 break; 4330 4331 case REPORT_LUNS: 4332 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 4333 break; 4334 4335 case REQUEST_SENSE: 4336 ata_scsi_set_sense(dev, cmd, 0, 0, 0); 4337 cmd->result = (DRIVER_SENSE << 24); 4338 cmd->scsi_done(cmd); 4339 break; 4340 4341 /* if we reach this, then writeback caching is disabled, 4342 * turning this into a no-op. 4343 */ 4344 case SYNCHRONIZE_CACHE: 4345 /* fall through */ 4346 4347 /* no-op's, complete with success */ 4348 case REZERO_UNIT: 4349 case SEEK_6: 4350 case SEEK_10: 4351 case TEST_UNIT_READY: 4352 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 4353 break; 4354 4355 case SEND_DIAGNOSTIC: 4356 tmp8 = scsicmd[1] & ~(1 << 3); 4357 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4])) 4358 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 4359 else 4360 ata_scsi_invalid_field(dev, cmd, 1); 4361 break; 4362 4363 case MAINTENANCE_IN: 4364 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) 4365 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); 4366 else 4367 ata_scsi_invalid_field(dev, cmd, 1); 4368 break; 4369 4370 /* all other commands */ 4371 default: 4372 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0); 4373 /* "Invalid command operation code" */ 4374 cmd->scsi_done(cmd); 4375 break; 4376 } 4377 } 4378 4379 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) 4380 { 4381 int i, rc; 4382 4383 for (i = 0; i < host->n_ports; i++) { 4384 struct ata_port *ap = host->ports[i]; 4385 struct Scsi_Host *shost; 4386 4387 rc = -ENOMEM; 4388 shost = scsi_host_alloc(sht, sizeof(struct ata_port *)); 4389 if (!shost) 4390 goto err_alloc; 4391 4392 shost->eh_noresume = 1; 4393 *(struct ata_port **)&shost->hostdata[0] = ap; 4394 ap->scsi_host = shost; 4395 4396 shost->transportt = ata_scsi_transport_template; 4397 shost->unique_id = ap->print_id; 4398 shost->max_id = 16; 4399 shost->max_lun = 1; 4400 shost->max_channel = 1; 4401 shost->max_cmd_len = 16; 4402 4403 /* Schedule policy is determined by ->qc_defer() 4404 * callback and it needs to see every deferred qc. 4405 * Set host_blocked to 1 to prevent SCSI midlayer from 4406 * automatically deferring requests. 4407 */ 4408 shost->max_host_blocked = 1; 4409 4410 rc = scsi_add_host_with_dma(ap->scsi_host, 4411 &ap->tdev, ap->host->dev); 4412 if (rc) 4413 goto err_add; 4414 } 4415 4416 return 0; 4417 4418 err_add: 4419 scsi_host_put(host->ports[i]->scsi_host); 4420 err_alloc: 4421 while (--i >= 0) { 4422 struct Scsi_Host *shost = host->ports[i]->scsi_host; 4423 4424 scsi_remove_host(shost); 4425 scsi_host_put(shost); 4426 } 4427 return rc; 4428 } 4429 4430 void ata_scsi_scan_host(struct ata_port *ap, int sync) 4431 { 4432 int tries = 5; 4433 struct ata_device *last_failed_dev = NULL; 4434 struct ata_link *link; 4435 struct ata_device *dev; 4436 4437 repeat: 4438 ata_for_each_link(link, ap, EDGE) { 4439 ata_for_each_dev(dev, link, ENABLED) { 4440 struct scsi_device *sdev; 4441 int channel = 0, id = 0; 4442 4443 if (dev->sdev) 4444 continue; 4445 4446 if (ata_is_host_link(link)) 4447 id = dev->devno; 4448 else 4449 channel = link->pmp; 4450 4451 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, 4452 NULL); 4453 if (!IS_ERR(sdev)) { 4454 dev->sdev = sdev; 4455 scsi_device_put(sdev); 4456 } else { 4457 dev->sdev = NULL; 4458 } 4459 } 4460 } 4461 4462 /* If we scanned while EH was in progress or allocation 4463 * failure occurred, scan would have failed silently. Check 4464 * whether all devices are attached. 4465 */ 4466 ata_for_each_link(link, ap, EDGE) { 4467 ata_for_each_dev(dev, link, ENABLED) { 4468 if (!dev->sdev) 4469 goto exit_loop; 4470 } 4471 } 4472 exit_loop: 4473 if (!link) 4474 return; 4475 4476 /* we're missing some SCSI devices */ 4477 if (sync) { 4478 /* If caller requested synchrnous scan && we've made 4479 * any progress, sleep briefly and repeat. 4480 */ 4481 if (dev != last_failed_dev) { 4482 msleep(100); 4483 last_failed_dev = dev; 4484 goto repeat; 4485 } 4486 4487 /* We might be failing to detect boot device, give it 4488 * a few more chances. 4489 */ 4490 if (--tries) { 4491 msleep(100); 4492 goto repeat; 4493 } 4494 4495 ata_port_err(ap, 4496 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n"); 4497 } 4498 4499 queue_delayed_work(system_long_wq, &ap->hotplug_task, 4500 round_jiffies_relative(HZ)); 4501 } 4502 4503 /** 4504 * ata_scsi_offline_dev - offline attached SCSI device 4505 * @dev: ATA device to offline attached SCSI device for 4506 * 4507 * This function is called from ata_eh_hotplug() and responsible 4508 * for taking the SCSI device attached to @dev offline. This 4509 * function is called with host lock which protects dev->sdev 4510 * against clearing. 4511 * 4512 * LOCKING: 4513 * spin_lock_irqsave(host lock) 4514 * 4515 * RETURNS: 4516 * 1 if attached SCSI device exists, 0 otherwise. 4517 */ 4518 int ata_scsi_offline_dev(struct ata_device *dev) 4519 { 4520 if (dev->sdev) { 4521 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 4522 return 1; 4523 } 4524 return 0; 4525 } 4526 4527 /** 4528 * ata_scsi_remove_dev - remove attached SCSI device 4529 * @dev: ATA device to remove attached SCSI device for 4530 * 4531 * This function is called from ata_eh_scsi_hotplug() and 4532 * responsible for removing the SCSI device attached to @dev. 4533 * 4534 * LOCKING: 4535 * Kernel thread context (may sleep). 4536 */ 4537 static void ata_scsi_remove_dev(struct ata_device *dev) 4538 { 4539 struct ata_port *ap = dev->link->ap; 4540 struct scsi_device *sdev; 4541 unsigned long flags; 4542 4543 /* Alas, we need to grab scan_mutex to ensure SCSI device 4544 * state doesn't change underneath us and thus 4545 * scsi_device_get() always succeeds. The mutex locking can 4546 * be removed if there is __scsi_device_get() interface which 4547 * increments reference counts regardless of device state. 4548 */ 4549 mutex_lock(&ap->scsi_host->scan_mutex); 4550 spin_lock_irqsave(ap->lock, flags); 4551 4552 /* clearing dev->sdev is protected by host lock */ 4553 sdev = dev->sdev; 4554 dev->sdev = NULL; 4555 4556 if (sdev) { 4557 /* If user initiated unplug races with us, sdev can go 4558 * away underneath us after the host lock and 4559 * scan_mutex are released. Hold onto it. 4560 */ 4561 if (scsi_device_get(sdev) == 0) { 4562 /* The following ensures the attached sdev is 4563 * offline on return from ata_scsi_offline_dev() 4564 * regardless it wins or loses the race 4565 * against this function. 4566 */ 4567 scsi_device_set_state(sdev, SDEV_OFFLINE); 4568 } else { 4569 WARN_ON(1); 4570 sdev = NULL; 4571 } 4572 } 4573 4574 spin_unlock_irqrestore(ap->lock, flags); 4575 mutex_unlock(&ap->scsi_host->scan_mutex); 4576 4577 if (sdev) { 4578 ata_dev_info(dev, "detaching (SCSI %s)\n", 4579 dev_name(&sdev->sdev_gendev)); 4580 4581 scsi_remove_device(sdev); 4582 scsi_device_put(sdev); 4583 } 4584 } 4585 4586 static void ata_scsi_handle_link_detach(struct ata_link *link) 4587 { 4588 struct ata_port *ap = link->ap; 4589 struct ata_device *dev; 4590 4591 ata_for_each_dev(dev, link, ALL) { 4592 unsigned long flags; 4593 4594 if (!(dev->flags & ATA_DFLAG_DETACHED)) 4595 continue; 4596 4597 spin_lock_irqsave(ap->lock, flags); 4598 dev->flags &= ~ATA_DFLAG_DETACHED; 4599 spin_unlock_irqrestore(ap->lock, flags); 4600 4601 if (zpodd_dev_enabled(dev)) 4602 zpodd_exit(dev); 4603 4604 ata_scsi_remove_dev(dev); 4605 } 4606 } 4607 4608 /** 4609 * ata_scsi_media_change_notify - send media change event 4610 * @dev: Pointer to the disk device with media change event 4611 * 4612 * Tell the block layer to send a media change notification 4613 * event. 4614 * 4615 * LOCKING: 4616 * spin_lock_irqsave(host lock) 4617 */ 4618 void ata_scsi_media_change_notify(struct ata_device *dev) 4619 { 4620 if (dev->sdev) 4621 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE, 4622 GFP_ATOMIC); 4623 } 4624 4625 /** 4626 * ata_scsi_hotplug - SCSI part of hotplug 4627 * @work: Pointer to ATA port to perform SCSI hotplug on 4628 * 4629 * Perform SCSI part of hotplug. It's executed from a separate 4630 * workqueue after EH completes. This is necessary because SCSI 4631 * hot plugging requires working EH and hot unplugging is 4632 * synchronized with hot plugging with a mutex. 4633 * 4634 * LOCKING: 4635 * Kernel thread context (may sleep). 4636 */ 4637 void ata_scsi_hotplug(struct work_struct *work) 4638 { 4639 struct ata_port *ap = 4640 container_of(work, struct ata_port, hotplug_task.work); 4641 int i; 4642 4643 if (ap->pflags & ATA_PFLAG_UNLOADING) { 4644 DPRINTK("ENTER/EXIT - unloading\n"); 4645 return; 4646 } 4647 4648 /* 4649 * XXX - UGLY HACK 4650 * 4651 * The block layer suspend/resume path is fundamentally broken due 4652 * to freezable kthreads and workqueue and may deadlock if a block 4653 * device gets removed while resume is in progress. I don't know 4654 * what the solution is short of removing freezable kthreads and 4655 * workqueues altogether. 4656 * 4657 * The following is an ugly hack to avoid kicking off device 4658 * removal while freezer is active. This is a joke but does avoid 4659 * this particular deadlock scenario. 4660 * 4661 * https://bugzilla.kernel.org/show_bug.cgi?id=62801 4662 * http://marc.info/?l=linux-kernel&m=138695698516487 4663 */ 4664 #ifdef CONFIG_FREEZER 4665 while (pm_freezing) 4666 msleep(10); 4667 #endif 4668 4669 DPRINTK("ENTER\n"); 4670 mutex_lock(&ap->scsi_scan_mutex); 4671 4672 /* Unplug detached devices. We cannot use link iterator here 4673 * because PMP links have to be scanned even if PMP is 4674 * currently not attached. Iterate manually. 4675 */ 4676 ata_scsi_handle_link_detach(&ap->link); 4677 if (ap->pmp_link) 4678 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 4679 ata_scsi_handle_link_detach(&ap->pmp_link[i]); 4680 4681 /* scan for new ones */ 4682 ata_scsi_scan_host(ap, 0); 4683 4684 mutex_unlock(&ap->scsi_scan_mutex); 4685 DPRINTK("EXIT\n"); 4686 } 4687 4688 /** 4689 * ata_scsi_user_scan - indication for user-initiated bus scan 4690 * @shost: SCSI host to scan 4691 * @channel: Channel to scan 4692 * @id: ID to scan 4693 * @lun: LUN to scan 4694 * 4695 * This function is called when user explicitly requests bus 4696 * scan. Set probe pending flag and invoke EH. 4697 * 4698 * LOCKING: 4699 * SCSI layer (we don't care) 4700 * 4701 * RETURNS: 4702 * Zero. 4703 */ 4704 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 4705 unsigned int id, u64 lun) 4706 { 4707 struct ata_port *ap = ata_shost_to_port(shost); 4708 unsigned long flags; 4709 int devno, rc = 0; 4710 4711 if (!ap->ops->error_handler) 4712 return -EOPNOTSUPP; 4713 4714 if (lun != SCAN_WILD_CARD && lun) 4715 return -EINVAL; 4716 4717 if (!sata_pmp_attached(ap)) { 4718 if (channel != SCAN_WILD_CARD && channel) 4719 return -EINVAL; 4720 devno = id; 4721 } else { 4722 if (id != SCAN_WILD_CARD && id) 4723 return -EINVAL; 4724 devno = channel; 4725 } 4726 4727 spin_lock_irqsave(ap->lock, flags); 4728 4729 if (devno == SCAN_WILD_CARD) { 4730 struct ata_link *link; 4731 4732 ata_for_each_link(link, ap, EDGE) { 4733 struct ata_eh_info *ehi = &link->eh_info; 4734 ehi->probe_mask |= ATA_ALL_DEVICES; 4735 ehi->action |= ATA_EH_RESET; 4736 } 4737 } else { 4738 struct ata_device *dev = ata_find_dev(ap, devno); 4739 4740 if (dev) { 4741 struct ata_eh_info *ehi = &dev->link->eh_info; 4742 ehi->probe_mask |= 1 << dev->devno; 4743 ehi->action |= ATA_EH_RESET; 4744 } else 4745 rc = -EINVAL; 4746 } 4747 4748 if (rc == 0) { 4749 ata_port_schedule_eh(ap); 4750 spin_unlock_irqrestore(ap->lock, flags); 4751 ata_port_wait_eh(ap); 4752 } else 4753 spin_unlock_irqrestore(ap->lock, flags); 4754 4755 return rc; 4756 } 4757 4758 /** 4759 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 4760 * @work: Pointer to ATA port to perform scsi_rescan_device() 4761 * 4762 * After ATA pass thru (SAT) commands are executed successfully, 4763 * libata need to propagate the changes to SCSI layer. 4764 * 4765 * LOCKING: 4766 * Kernel thread context (may sleep). 4767 */ 4768 void ata_scsi_dev_rescan(struct work_struct *work) 4769 { 4770 struct ata_port *ap = 4771 container_of(work, struct ata_port, scsi_rescan_task); 4772 struct ata_link *link; 4773 struct ata_device *dev; 4774 unsigned long flags; 4775 4776 mutex_lock(&ap->scsi_scan_mutex); 4777 spin_lock_irqsave(ap->lock, flags); 4778 4779 ata_for_each_link(link, ap, EDGE) { 4780 ata_for_each_dev(dev, link, ENABLED) { 4781 struct scsi_device *sdev = dev->sdev; 4782 4783 if (!sdev) 4784 continue; 4785 if (scsi_device_get(sdev)) 4786 continue; 4787 4788 spin_unlock_irqrestore(ap->lock, flags); 4789 scsi_rescan_device(&(sdev->sdev_gendev)); 4790 scsi_device_put(sdev); 4791 spin_lock_irqsave(ap->lock, flags); 4792 } 4793 } 4794 4795 spin_unlock_irqrestore(ap->lock, flags); 4796 mutex_unlock(&ap->scsi_scan_mutex); 4797 } 4798 4799 /** 4800 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 4801 * @host: ATA host container for all SAS ports 4802 * @port_info: Information from low-level host driver 4803 * @shost: SCSI host that the scsi device is attached to 4804 * 4805 * LOCKING: 4806 * PCI/etc. bus probe sem. 4807 * 4808 * RETURNS: 4809 * ata_port pointer on success / NULL on failure. 4810 */ 4811 4812 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 4813 struct ata_port_info *port_info, 4814 struct Scsi_Host *shost) 4815 { 4816 struct ata_port *ap; 4817 4818 ap = ata_port_alloc(host); 4819 if (!ap) 4820 return NULL; 4821 4822 ap->port_no = 0; 4823 ap->lock = &host->lock; 4824 ap->pio_mask = port_info->pio_mask; 4825 ap->mwdma_mask = port_info->mwdma_mask; 4826 ap->udma_mask = port_info->udma_mask; 4827 ap->flags |= port_info->flags; 4828 ap->ops = port_info->port_ops; 4829 ap->cbl = ATA_CBL_SATA; 4830 4831 return ap; 4832 } 4833 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 4834 4835 /** 4836 * ata_sas_port_start - Set port up for dma. 4837 * @ap: Port to initialize 4838 * 4839 * Called just after data structures for each port are 4840 * initialized. 4841 * 4842 * May be used as the port_start() entry in ata_port_operations. 4843 * 4844 * LOCKING: 4845 * Inherited from caller. 4846 */ 4847 int ata_sas_port_start(struct ata_port *ap) 4848 { 4849 /* 4850 * the port is marked as frozen at allocation time, but if we don't 4851 * have new eh, we won't thaw it 4852 */ 4853 if (!ap->ops->error_handler) 4854 ap->pflags &= ~ATA_PFLAG_FROZEN; 4855 return 0; 4856 } 4857 EXPORT_SYMBOL_GPL(ata_sas_port_start); 4858 4859 /** 4860 * ata_port_stop - Undo ata_sas_port_start() 4861 * @ap: Port to shut down 4862 * 4863 * May be used as the port_stop() entry in ata_port_operations. 4864 * 4865 * LOCKING: 4866 * Inherited from caller. 4867 */ 4868 4869 void ata_sas_port_stop(struct ata_port *ap) 4870 { 4871 } 4872 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 4873 4874 /** 4875 * ata_sas_async_probe - simply schedule probing and return 4876 * @ap: Port to probe 4877 * 4878 * For batch scheduling of probe for sas attached ata devices, assumes 4879 * the port has already been through ata_sas_port_init() 4880 */ 4881 void ata_sas_async_probe(struct ata_port *ap) 4882 { 4883 __ata_port_probe(ap); 4884 } 4885 EXPORT_SYMBOL_GPL(ata_sas_async_probe); 4886 4887 int ata_sas_sync_probe(struct ata_port *ap) 4888 { 4889 return ata_port_probe(ap); 4890 } 4891 EXPORT_SYMBOL_GPL(ata_sas_sync_probe); 4892 4893 4894 /** 4895 * ata_sas_port_init - Initialize a SATA device 4896 * @ap: SATA port to initialize 4897 * 4898 * LOCKING: 4899 * PCI/etc. bus probe sem. 4900 * 4901 * RETURNS: 4902 * Zero on success, non-zero on error. 4903 */ 4904 4905 int ata_sas_port_init(struct ata_port *ap) 4906 { 4907 int rc = ap->ops->port_start(ap); 4908 4909 if (rc) 4910 return rc; 4911 ap->print_id = atomic_inc_return(&ata_print_id); 4912 return 0; 4913 } 4914 EXPORT_SYMBOL_GPL(ata_sas_port_init); 4915 4916 /** 4917 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 4918 * @ap: SATA port to destroy 4919 * 4920 */ 4921 4922 void ata_sas_port_destroy(struct ata_port *ap) 4923 { 4924 if (ap->ops->port_stop) 4925 ap->ops->port_stop(ap); 4926 kfree(ap); 4927 } 4928 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 4929 4930 /** 4931 * ata_sas_slave_configure - Default slave_config routine for libata devices 4932 * @sdev: SCSI device to configure 4933 * @ap: ATA port to which SCSI device is attached 4934 * 4935 * RETURNS: 4936 * Zero. 4937 */ 4938 4939 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 4940 { 4941 ata_scsi_sdev_config(sdev); 4942 ata_scsi_dev_config(sdev, ap->link.device); 4943 return 0; 4944 } 4945 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 4946 4947 /** 4948 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 4949 * @cmd: SCSI command to be sent 4950 * @ap: ATA port to which the command is being sent 4951 * 4952 * RETURNS: 4953 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 4954 * 0 otherwise. 4955 */ 4956 4957 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) 4958 { 4959 int rc = 0; 4960 4961 ata_scsi_dump_cdb(ap, cmd); 4962 4963 if (likely(ata_dev_enabled(ap->link.device))) 4964 rc = __ata_scsi_queuecmd(cmd, ap->link.device); 4965 else { 4966 cmd->result = (DID_BAD_TARGET << 16); 4967 cmd->scsi_done(cmd); 4968 } 4969 return rc; 4970 } 4971 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 4972 4973 int ata_sas_allocate_tag(struct ata_port *ap) 4974 { 4975 unsigned int max_queue = ap->host->n_tags; 4976 unsigned int i, tag; 4977 4978 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) { 4979 tag = tag < max_queue ? tag : 0; 4980 4981 /* the last tag is reserved for internal command. */ 4982 if (tag == ATA_TAG_INTERNAL) 4983 continue; 4984 4985 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) { 4986 ap->sas_last_tag = tag; 4987 return tag; 4988 } 4989 } 4990 return -1; 4991 } 4992 4993 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) 4994 { 4995 clear_bit(tag, &ap->sas_tag_allocated); 4996 } 4997