1 /* 2 * libata-scsi.c - helper library for ATA 3 * 4 * Maintained by: Jeff Garzik <jgarzik@pobox.com> 5 * Please ALWAYS copy linux-ide@vger.kernel.org 6 * on emails. 7 * 8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 9 * Copyright 2003-2004 Jeff Garzik 10 * 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2, or (at your option) 15 * any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; see the file COPYING. If not, write to 24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 25 * 26 * 27 * libata documentation is available via 'make {ps|pdf}docs', 28 * as Documentation/DocBook/libata.* 29 * 30 * Hardware documentation available from 31 * - http://www.t10.org/ 32 * - http://www.t13.org/ 33 * 34 */ 35 36 #include <linux/kernel.h> 37 #include <linux/blkdev.h> 38 #include <linux/spinlock.h> 39 #include <scsi/scsi.h> 40 #include <scsi/scsi_host.h> 41 #include <scsi/scsi_cmnd.h> 42 #include <scsi/scsi_eh.h> 43 #include <scsi/scsi_device.h> 44 #include <scsi/scsi_tcq.h> 45 #include <scsi/scsi_transport.h> 46 #include <linux/libata.h> 47 #include <linux/hdreg.h> 48 #include <asm/uaccess.h> 49 50 #include "libata.h" 51 52 #define SECTOR_SIZE 512 53 54 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); 55 56 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, 57 const struct scsi_device *scsidev); 58 static struct ata_device * ata_scsi_find_dev(struct ata_port *ap, 59 const struct scsi_device *scsidev); 60 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 61 unsigned int id, unsigned int lun); 62 63 64 #define RW_RECOVERY_MPAGE 0x1 65 #define RW_RECOVERY_MPAGE_LEN 12 66 #define CACHE_MPAGE 0x8 67 #define CACHE_MPAGE_LEN 20 68 #define CONTROL_MPAGE 0xa 69 #define CONTROL_MPAGE_LEN 12 70 #define ALL_MPAGES 0x3f 71 #define ALL_SUB_MPAGES 0xff 72 73 74 static const u8 def_rw_recovery_mpage[] = { 75 RW_RECOVERY_MPAGE, 76 RW_RECOVERY_MPAGE_LEN - 2, 77 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */ 78 (1 << 6), /* ARRE (auto read reallocation) */ 79 0, /* read retry count */ 80 0, 0, 0, 0, 81 0, /* write retry count */ 82 0, 0, 0 83 }; 84 85 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { 86 CACHE_MPAGE, 87 CACHE_MPAGE_LEN - 2, 88 0, /* contains WCE, needs to be 0 for logic */ 89 0, 0, 0, 0, 0, 0, 0, 0, 0, 90 0, /* contains DRA, needs to be 0 for logic */ 91 0, 0, 0, 0, 0, 0, 0 92 }; 93 94 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 95 CONTROL_MPAGE, 96 CONTROL_MPAGE_LEN - 2, 97 2, /* DSENSE=0, GLTSD=1 */ 98 0, /* [QAM+QERR may be 1, see 05-359r1] */ 99 0, 0, 0, 0, 0xff, 0xff, 100 0, 30 /* extended self test time, see 05-359r1 */ 101 }; 102 103 /* 104 * libata transport template. libata doesn't do real transport stuff. 105 * It just needs the eh_timed_out hook. 106 */ 107 struct scsi_transport_template ata_scsi_transport_template = { 108 .eh_strategy_handler = ata_scsi_error, 109 .eh_timed_out = ata_scsi_timed_out, 110 .user_scan = ata_scsi_user_scan, 111 }; 112 113 114 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, 115 void (*done)(struct scsi_cmnd *)) 116 { 117 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); 118 /* "Invalid field in cbd" */ 119 done(cmd); 120 } 121 122 /** 123 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. 124 * @sdev: SCSI device for which BIOS geometry is to be determined 125 * @bdev: block device associated with @sdev 126 * @capacity: capacity of SCSI device 127 * @geom: location to which geometry will be output 128 * 129 * Generic bios head/sector/cylinder calculator 130 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) 131 * mapping. Some situations may arise where the disk is not 132 * bootable if this is not used. 133 * 134 * LOCKING: 135 * Defined by the SCSI layer. We don't really care. 136 * 137 * RETURNS: 138 * Zero. 139 */ 140 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, 141 sector_t capacity, int geom[]) 142 { 143 geom[0] = 255; 144 geom[1] = 63; 145 sector_div(capacity, 255*63); 146 geom[2] = capacity; 147 148 return 0; 149 } 150 151 /** 152 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl 153 * @scsidev: Device to which we are issuing command 154 * @arg: User provided data for issuing command 155 * 156 * LOCKING: 157 * Defined by the SCSI layer. We don't really care. 158 * 159 * RETURNS: 160 * Zero on success, negative errno on error. 161 */ 162 163 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) 164 { 165 int rc = 0; 166 u8 scsi_cmd[MAX_COMMAND_SIZE]; 167 u8 args[4], *argbuf = NULL, *sensebuf = NULL; 168 int argsize = 0; 169 enum dma_data_direction data_dir; 170 int cmd_result; 171 172 if (arg == NULL) 173 return -EINVAL; 174 175 if (copy_from_user(args, arg, sizeof(args))) 176 return -EFAULT; 177 178 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 179 if (!sensebuf) 180 return -ENOMEM; 181 182 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 183 184 if (args[3]) { 185 argsize = SECTOR_SIZE * args[3]; 186 argbuf = kmalloc(argsize, GFP_KERNEL); 187 if (argbuf == NULL) { 188 rc = -ENOMEM; 189 goto error; 190 } 191 192 scsi_cmd[1] = (4 << 1); /* PIO Data-in */ 193 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, 194 block count in sector count field */ 195 data_dir = DMA_FROM_DEVICE; 196 } else { 197 scsi_cmd[1] = (3 << 1); /* Non-data */ 198 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 199 data_dir = DMA_NONE; 200 } 201 202 scsi_cmd[0] = ATA_16; 203 204 scsi_cmd[4] = args[2]; 205 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ 206 scsi_cmd[6] = args[3]; 207 scsi_cmd[8] = args[1]; 208 scsi_cmd[10] = 0x4f; 209 scsi_cmd[12] = 0xc2; 210 } else { 211 scsi_cmd[6] = args[1]; 212 } 213 scsi_cmd[14] = args[0]; 214 215 /* Good values for timeout and retries? Values below 216 from scsi_ioctl_send_command() for default case... */ 217 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, 218 sensebuf, (10*HZ), 5, 0); 219 220 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 221 u8 *desc = sensebuf + 8; 222 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 223 224 /* If we set cc then ATA pass-through will cause a 225 * check condition even if no error. Filter that. */ 226 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 227 struct scsi_sense_hdr sshdr; 228 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 229 &sshdr); 230 if (sshdr.sense_key==0 && 231 sshdr.asc==0 && sshdr.ascq==0) 232 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 233 } 234 235 /* Send userspace a few ATA registers (same as drivers/ide) */ 236 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 237 desc[0] == 0x09 ) { /* code is "ATA Descriptor" */ 238 args[0] = desc[13]; /* status */ 239 args[1] = desc[3]; /* error */ 240 args[2] = desc[5]; /* sector count (0:7) */ 241 if (copy_to_user(arg, args, sizeof(args))) 242 rc = -EFAULT; 243 } 244 } 245 246 247 if (cmd_result) { 248 rc = -EIO; 249 goto error; 250 } 251 252 if ((argbuf) 253 && copy_to_user(arg + sizeof(args), argbuf, argsize)) 254 rc = -EFAULT; 255 error: 256 kfree(sensebuf); 257 kfree(argbuf); 258 return rc; 259 } 260 261 /** 262 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl 263 * @scsidev: Device to which we are issuing command 264 * @arg: User provided data for issuing command 265 * 266 * LOCKING: 267 * Defined by the SCSI layer. We don't really care. 268 * 269 * RETURNS: 270 * Zero on success, negative errno on error. 271 */ 272 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) 273 { 274 int rc = 0; 275 u8 scsi_cmd[MAX_COMMAND_SIZE]; 276 u8 args[7], *sensebuf = NULL; 277 int cmd_result; 278 279 if (arg == NULL) 280 return -EINVAL; 281 282 if (copy_from_user(args, arg, sizeof(args))) 283 return -EFAULT; 284 285 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO); 286 if (!sensebuf) 287 return -ENOMEM; 288 289 memset(scsi_cmd, 0, sizeof(scsi_cmd)); 290 scsi_cmd[0] = ATA_16; 291 scsi_cmd[1] = (3 << 1); /* Non-data */ 292 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ 293 scsi_cmd[4] = args[1]; 294 scsi_cmd[6] = args[2]; 295 scsi_cmd[8] = args[3]; 296 scsi_cmd[10] = args[4]; 297 scsi_cmd[12] = args[5]; 298 scsi_cmd[14] = args[0]; 299 300 /* Good values for timeout and retries? Values below 301 from scsi_ioctl_send_command() for default case... */ 302 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, 303 sensebuf, (10*HZ), 5, 0); 304 305 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ 306 u8 *desc = sensebuf + 8; 307 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ 308 309 /* If we set cc then ATA pass-through will cause a 310 * check condition even if no error. Filter that. */ 311 if (cmd_result & SAM_STAT_CHECK_CONDITION) { 312 struct scsi_sense_hdr sshdr; 313 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, 314 &sshdr); 315 if (sshdr.sense_key==0 && 316 sshdr.asc==0 && sshdr.ascq==0) 317 cmd_result &= ~SAM_STAT_CHECK_CONDITION; 318 } 319 320 /* Send userspace ATA registers */ 321 if (sensebuf[0] == 0x72 && /* format is "descriptor" */ 322 desc[0] == 0x09) {/* code is "ATA Descriptor" */ 323 args[0] = desc[13]; /* status */ 324 args[1] = desc[3]; /* error */ 325 args[2] = desc[5]; /* sector count (0:7) */ 326 args[3] = desc[7]; /* lbal */ 327 args[4] = desc[9]; /* lbam */ 328 args[5] = desc[11]; /* lbah */ 329 args[6] = desc[12]; /* select */ 330 if (copy_to_user(arg, args, sizeof(args))) 331 rc = -EFAULT; 332 } 333 } 334 335 if (cmd_result) { 336 rc = -EIO; 337 goto error; 338 } 339 340 error: 341 kfree(sensebuf); 342 return rc; 343 } 344 345 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) 346 { 347 int val = -EINVAL, rc = -EINVAL; 348 349 switch (cmd) { 350 case ATA_IOC_GET_IO32: 351 val = 0; 352 if (copy_to_user(arg, &val, 1)) 353 return -EFAULT; 354 return 0; 355 356 case ATA_IOC_SET_IO32: 357 val = (unsigned long) arg; 358 if (val != 0) 359 return -EINVAL; 360 return 0; 361 362 case HDIO_DRIVE_CMD: 363 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 364 return -EACCES; 365 return ata_cmd_ioctl(scsidev, arg); 366 367 case HDIO_DRIVE_TASK: 368 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 369 return -EACCES; 370 return ata_task_ioctl(scsidev, arg); 371 372 default: 373 rc = -ENOTTY; 374 break; 375 } 376 377 return rc; 378 } 379 380 /** 381 * ata_scsi_qc_new - acquire new ata_queued_cmd reference 382 * @dev: ATA device to which the new command is attached 383 * @cmd: SCSI command that originated this ATA command 384 * @done: SCSI command completion function 385 * 386 * Obtain a reference to an unused ata_queued_cmd structure, 387 * which is the basic libata structure representing a single 388 * ATA command sent to the hardware. 389 * 390 * If a command was available, fill in the SCSI-specific 391 * portions of the structure with information on the 392 * current command. 393 * 394 * LOCKING: 395 * spin_lock_irqsave(host lock) 396 * 397 * RETURNS: 398 * Command allocated, or %NULL if none available. 399 */ 400 struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, 401 struct scsi_cmnd *cmd, 402 void (*done)(struct scsi_cmnd *)) 403 { 404 struct ata_queued_cmd *qc; 405 406 qc = ata_qc_new_init(dev); 407 if (qc) { 408 qc->scsicmd = cmd; 409 qc->scsidone = done; 410 411 if (cmd->use_sg) { 412 qc->__sg = (struct scatterlist *) cmd->request_buffer; 413 qc->n_elem = cmd->use_sg; 414 } else if (cmd->request_bufflen) { 415 qc->__sg = &qc->sgent; 416 qc->n_elem = 1; 417 } 418 } else { 419 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); 420 done(cmd); 421 } 422 423 return qc; 424 } 425 426 /** 427 * ata_dump_status - user friendly display of error info 428 * @id: id of the port in question 429 * @tf: ptr to filled out taskfile 430 * 431 * Decode and dump the ATA error/status registers for the user so 432 * that they have some idea what really happened at the non 433 * make-believe layer. 434 * 435 * LOCKING: 436 * inherited from caller 437 */ 438 void ata_dump_status(unsigned id, struct ata_taskfile *tf) 439 { 440 u8 stat = tf->command, err = tf->feature; 441 442 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); 443 if (stat & ATA_BUSY) { 444 printk("Busy }\n"); /* Data is not valid in this case */ 445 } else { 446 if (stat & 0x40) printk("DriveReady "); 447 if (stat & 0x20) printk("DeviceFault "); 448 if (stat & 0x10) printk("SeekComplete "); 449 if (stat & 0x08) printk("DataRequest "); 450 if (stat & 0x04) printk("CorrectedError "); 451 if (stat & 0x02) printk("Index "); 452 if (stat & 0x01) printk("Error "); 453 printk("}\n"); 454 455 if (err) { 456 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); 457 if (err & 0x04) printk("DriveStatusError "); 458 if (err & 0x80) { 459 if (err & 0x04) printk("BadCRC "); 460 else printk("Sector "); 461 } 462 if (err & 0x40) printk("UncorrectableError "); 463 if (err & 0x10) printk("SectorIdNotFound "); 464 if (err & 0x02) printk("TrackZeroNotFound "); 465 if (err & 0x01) printk("AddrMarkNotFound "); 466 printk("}\n"); 467 } 468 } 469 } 470 471 /** 472 * ata_scsi_device_suspend - suspend ATA device associated with sdev 473 * @sdev: the SCSI device to suspend 474 * @mesg: target power management message 475 * 476 * Request suspend EH action on the ATA device associated with 477 * @sdev and wait for the operation to complete. 478 * 479 * LOCKING: 480 * Kernel thread context (may sleep). 481 * 482 * RETURNS: 483 * 0 on success, -errno otherwise. 484 */ 485 int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg) 486 { 487 struct ata_port *ap = ata_shost_to_port(sdev->host); 488 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 489 unsigned long flags; 490 unsigned int action; 491 int rc = 0; 492 493 if (!dev) 494 goto out; 495 496 spin_lock_irqsave(ap->lock, flags); 497 498 /* wait for the previous resume to complete */ 499 while (dev->flags & ATA_DFLAG_SUSPENDED) { 500 spin_unlock_irqrestore(ap->lock, flags); 501 ata_port_wait_eh(ap); 502 spin_lock_irqsave(ap->lock, flags); 503 } 504 505 /* if @sdev is already detached, nothing to do */ 506 if (sdev->sdev_state == SDEV_OFFLINE || 507 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL) 508 goto out_unlock; 509 510 /* request suspend */ 511 action = ATA_EH_SUSPEND; 512 if (mesg.event != PM_EVENT_SUSPEND) 513 action |= ATA_EH_PM_FREEZE; 514 ap->eh_info.dev_action[dev->devno] |= action; 515 ap->eh_info.flags |= ATA_EHI_QUIET; 516 ata_port_schedule_eh(ap); 517 518 spin_unlock_irqrestore(ap->lock, flags); 519 520 /* wait for EH to do the job */ 521 ata_port_wait_eh(ap); 522 523 spin_lock_irqsave(ap->lock, flags); 524 525 /* If @sdev is still attached but the associated ATA device 526 * isn't suspended, the operation failed. 527 */ 528 if (sdev->sdev_state != SDEV_OFFLINE && 529 sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL && 530 !(dev->flags & ATA_DFLAG_SUSPENDED)) 531 rc = -EIO; 532 533 out_unlock: 534 spin_unlock_irqrestore(ap->lock, flags); 535 out: 536 if (rc == 0) 537 sdev->sdev_gendev.power.power_state = mesg; 538 return rc; 539 } 540 541 /** 542 * ata_scsi_device_resume - resume ATA device associated with sdev 543 * @sdev: the SCSI device to resume 544 * 545 * Request resume EH action on the ATA device associated with 546 * @sdev and return immediately. This enables parallel 547 * wakeup/spinup of devices. 548 * 549 * LOCKING: 550 * Kernel thread context (may sleep). 551 * 552 * RETURNS: 553 * 0. 554 */ 555 int ata_scsi_device_resume(struct scsi_device *sdev) 556 { 557 struct ata_port *ap = ata_shost_to_port(sdev->host); 558 struct ata_device *dev = ata_scsi_find_dev(ap, sdev); 559 struct ata_eh_info *ehi = &ap->eh_info; 560 unsigned long flags; 561 unsigned int action; 562 563 if (!dev) 564 goto out; 565 566 spin_lock_irqsave(ap->lock, flags); 567 568 /* if @sdev is already detached, nothing to do */ 569 if (sdev->sdev_state == SDEV_OFFLINE || 570 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL) 571 goto out_unlock; 572 573 /* request resume */ 574 action = ATA_EH_RESUME; 575 if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND) 576 __ata_ehi_hotplugged(ehi); 577 else 578 action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET; 579 ehi->dev_action[dev->devno] |= action; 580 581 /* We don't want autopsy and verbose EH messages. Disable 582 * those if we're the only device on this link. 583 */ 584 if (ata_port_max_devices(ap) == 1) 585 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 586 587 ata_port_schedule_eh(ap); 588 589 out_unlock: 590 spin_unlock_irqrestore(ap->lock, flags); 591 out: 592 sdev->sdev_gendev.power.power_state = PMSG_ON; 593 return 0; 594 } 595 596 /** 597 * ata_to_sense_error - convert ATA error to SCSI error 598 * @id: ATA device number 599 * @drv_stat: value contained in ATA status register 600 * @drv_err: value contained in ATA error register 601 * @sk: the sense key we'll fill out 602 * @asc: the additional sense code we'll fill out 603 * @ascq: the additional sense code qualifier we'll fill out 604 * @verbose: be verbose 605 * 606 * Converts an ATA error into a SCSI error. Fill out pointers to 607 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor 608 * format sense blocks. 609 * 610 * LOCKING: 611 * spin_lock_irqsave(host lock) 612 */ 613 void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, 614 u8 *ascq, int verbose) 615 { 616 int i; 617 618 /* Based on the 3ware driver translation table */ 619 static const unsigned char sense_table[][4] = { 620 /* BBD|ECC|ID|MAR */ 621 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command 622 /* BBD|ECC|ID */ 623 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command 624 /* ECC|MC|MARK */ 625 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error 626 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ 627 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error 628 /* MC|ID|ABRT|TRK0|MARK */ 629 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready 630 /* MCR|MARK */ 631 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready 632 /* Bad address mark */ 633 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field 634 /* TRK0 */ 635 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error 636 /* Abort & !ICRC */ 637 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command 638 /* Media change request */ 639 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline 640 /* SRV */ 641 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found 642 /* Media change */ 643 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline 644 /* ECC */ 645 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error 646 /* BBD - block marked bad */ 647 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error 648 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 649 }; 650 static const unsigned char stat_table[][4] = { 651 /* Must be first because BUSY means no other bits valid */ 652 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now 653 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault 654 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now 655 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered 656 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark 657 }; 658 659 /* 660 * Is this an error we can process/parse 661 */ 662 if (drv_stat & ATA_BUSY) { 663 drv_err = 0; /* Ignore the err bits, they're invalid */ 664 } 665 666 if (drv_err) { 667 /* Look for drv_err */ 668 for (i = 0; sense_table[i][0] != 0xFF; i++) { 669 /* Look for best matches first */ 670 if ((sense_table[i][0] & drv_err) == 671 sense_table[i][0]) { 672 *sk = sense_table[i][1]; 673 *asc = sense_table[i][2]; 674 *ascq = sense_table[i][3]; 675 goto translate_done; 676 } 677 } 678 /* No immediate match */ 679 if (verbose) 680 printk(KERN_WARNING "ata%u: no sense translation for " 681 "error 0x%02x\n", id, drv_err); 682 } 683 684 /* Fall back to interpreting status bits */ 685 for (i = 0; stat_table[i][0] != 0xFF; i++) { 686 if (stat_table[i][0] & drv_stat) { 687 *sk = stat_table[i][1]; 688 *asc = stat_table[i][2]; 689 *ascq = stat_table[i][3]; 690 goto translate_done; 691 } 692 } 693 /* No error? Undecoded? */ 694 if (verbose) 695 printk(KERN_WARNING "ata%u: no sense translation for " 696 "status: 0x%02x\n", id, drv_stat); 697 698 /* We need a sensible error return here, which is tricky, and one 699 that won't cause people to do things like return a disk wrongly */ 700 *sk = ABORTED_COMMAND; 701 *asc = 0x00; 702 *ascq = 0x00; 703 704 translate_done: 705 if (verbose) 706 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " 707 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", 708 id, drv_stat, drv_err, *sk, *asc, *ascq); 709 return; 710 } 711 712 /* 713 * ata_gen_passthru_sense - Generate check condition sense block. 714 * @qc: Command that completed. 715 * 716 * This function is specific to the ATA descriptor format sense 717 * block specified for the ATA pass through commands. Regardless 718 * of whether the command errored or not, return a sense 719 * block. Copy all controller registers into the sense 720 * block. Clear sense key, ASC & ASCQ if there is no error. 721 * 722 * LOCKING: 723 * None. 724 */ 725 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) 726 { 727 struct scsi_cmnd *cmd = qc->scsicmd; 728 struct ata_taskfile *tf = &qc->result_tf; 729 unsigned char *sb = cmd->sense_buffer; 730 unsigned char *desc = sb + 8; 731 int verbose = qc->ap->ops->error_handler == NULL; 732 733 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 734 735 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 736 737 /* 738 * Use ata_to_sense_error() to map status register bits 739 * onto sense key, asc & ascq. 740 */ 741 if (qc->err_mask || 742 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 743 ata_to_sense_error(qc->ap->id, tf->command, tf->feature, 744 &sb[1], &sb[2], &sb[3], verbose); 745 sb[1] &= 0x0f; 746 } 747 748 /* 749 * Sense data is current and format is descriptor. 750 */ 751 sb[0] = 0x72; 752 753 desc[0] = 0x09; 754 755 /* set length of additional sense data */ 756 sb[7] = 14; 757 desc[1] = 12; 758 759 /* 760 * Copy registers into sense buffer. 761 */ 762 desc[2] = 0x00; 763 desc[3] = tf->feature; /* == error reg */ 764 desc[5] = tf->nsect; 765 desc[7] = tf->lbal; 766 desc[9] = tf->lbam; 767 desc[11] = tf->lbah; 768 desc[12] = tf->device; 769 desc[13] = tf->command; /* == status reg */ 770 771 /* 772 * Fill in Extend bit, and the high order bytes 773 * if applicable. 774 */ 775 if (tf->flags & ATA_TFLAG_LBA48) { 776 desc[2] |= 0x01; 777 desc[4] = tf->hob_nsect; 778 desc[6] = tf->hob_lbal; 779 desc[8] = tf->hob_lbam; 780 desc[10] = tf->hob_lbah; 781 } 782 } 783 784 /** 785 * ata_gen_ata_sense - generate a SCSI fixed sense block 786 * @qc: Command that we are erroring out 787 * 788 * Generate sense block for a failed ATA command @qc. Descriptor 789 * format is used to accomodate LBA48 block address. 790 * 791 * LOCKING: 792 * None. 793 */ 794 static void ata_gen_ata_sense(struct ata_queued_cmd *qc) 795 { 796 struct ata_device *dev = qc->dev; 797 struct scsi_cmnd *cmd = qc->scsicmd; 798 struct ata_taskfile *tf = &qc->result_tf; 799 unsigned char *sb = cmd->sense_buffer; 800 unsigned char *desc = sb + 8; 801 int verbose = qc->ap->ops->error_handler == NULL; 802 u64 block; 803 804 memset(sb, 0, SCSI_SENSE_BUFFERSIZE); 805 806 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 807 808 /* sense data is current and format is descriptor */ 809 sb[0] = 0x72; 810 811 /* Use ata_to_sense_error() to map status register bits 812 * onto sense key, asc & ascq. 813 */ 814 if (qc->err_mask || 815 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { 816 ata_to_sense_error(qc->ap->id, tf->command, tf->feature, 817 &sb[1], &sb[2], &sb[3], verbose); 818 sb[1] &= 0x0f; 819 } 820 821 block = ata_tf_read_block(&qc->result_tf, dev); 822 823 /* information sense data descriptor */ 824 sb[7] = 12; 825 desc[0] = 0x00; 826 desc[1] = 10; 827 828 desc[2] |= 0x80; /* valid */ 829 desc[6] = block >> 40; 830 desc[7] = block >> 32; 831 desc[8] = block >> 24; 832 desc[9] = block >> 16; 833 desc[10] = block >> 8; 834 desc[11] = block; 835 } 836 837 static void ata_scsi_sdev_config(struct scsi_device *sdev) 838 { 839 sdev->use_10_for_rw = 1; 840 sdev->use_10_for_ms = 1; 841 } 842 843 static void ata_scsi_dev_config(struct scsi_device *sdev, 844 struct ata_device *dev) 845 { 846 /* configure max sectors */ 847 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors); 848 849 /* SATA DMA transfers must be multiples of 4 byte, so 850 * we need to pad ATAPI transfers using an extra sg. 851 * Decrement max hw segments accordingly. 852 */ 853 if (dev->class == ATA_DEV_ATAPI) { 854 request_queue_t *q = sdev->request_queue; 855 blk_queue_max_hw_segments(q, q->max_hw_segments - 1); 856 } 857 858 if (dev->flags & ATA_DFLAG_NCQ) { 859 int depth; 860 861 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 862 depth = min(ATA_MAX_QUEUE - 1, depth); 863 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); 864 } 865 } 866 867 /** 868 * ata_scsi_slave_config - Set SCSI device attributes 869 * @sdev: SCSI device to examine 870 * 871 * This is called before we actually start reading 872 * and writing to the device, to configure certain 873 * SCSI mid-layer behaviors. 874 * 875 * LOCKING: 876 * Defined by SCSI layer. We don't really care. 877 */ 878 879 int ata_scsi_slave_config(struct scsi_device *sdev) 880 { 881 struct ata_port *ap = ata_shost_to_port(sdev->host); 882 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); 883 884 ata_scsi_sdev_config(sdev); 885 886 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); 887 888 if (dev) 889 ata_scsi_dev_config(sdev, dev); 890 891 return 0; /* scsi layer doesn't check return value, sigh */ 892 } 893 894 /** 895 * ata_scsi_slave_destroy - SCSI device is about to be destroyed 896 * @sdev: SCSI device to be destroyed 897 * 898 * @sdev is about to be destroyed for hot/warm unplugging. If 899 * this unplugging was initiated by libata as indicated by NULL 900 * dev->sdev, this function doesn't have to do anything. 901 * Otherwise, SCSI layer initiated warm-unplug is in progress. 902 * Clear dev->sdev, schedule the device for ATA detach and invoke 903 * EH. 904 * 905 * LOCKING: 906 * Defined by SCSI layer. We don't really care. 907 */ 908 void ata_scsi_slave_destroy(struct scsi_device *sdev) 909 { 910 struct ata_port *ap = ata_shost_to_port(sdev->host); 911 unsigned long flags; 912 struct ata_device *dev; 913 914 if (!ap->ops->error_handler) 915 return; 916 917 spin_lock_irqsave(ap->lock, flags); 918 dev = __ata_scsi_find_dev(ap, sdev); 919 if (dev && dev->sdev) { 920 /* SCSI device already in CANCEL state, no need to offline it */ 921 dev->sdev = NULL; 922 dev->flags |= ATA_DFLAG_DETACH; 923 ata_port_schedule_eh(ap); 924 } 925 spin_unlock_irqrestore(ap->lock, flags); 926 } 927 928 /** 929 * ata_scsi_change_queue_depth - SCSI callback for queue depth config 930 * @sdev: SCSI device to configure queue depth for 931 * @queue_depth: new queue depth 932 * 933 * This is libata standard hostt->change_queue_depth callback. 934 * SCSI will call into this callback when user tries to set queue 935 * depth via sysfs. 936 * 937 * LOCKING: 938 * SCSI layer (we don't care) 939 * 940 * RETURNS: 941 * Newly configured queue depth. 942 */ 943 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) 944 { 945 struct ata_port *ap = ata_shost_to_port(sdev->host); 946 struct ata_device *dev; 947 unsigned long flags; 948 int max_depth; 949 950 if (queue_depth < 1) 951 return sdev->queue_depth; 952 953 dev = ata_scsi_find_dev(ap, sdev); 954 if (!dev || !ata_dev_enabled(dev)) 955 return sdev->queue_depth; 956 957 max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); 958 max_depth = min(ATA_MAX_QUEUE - 1, max_depth); 959 if (queue_depth > max_depth) 960 queue_depth = max_depth; 961 962 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); 963 964 spin_lock_irqsave(ap->lock, flags); 965 if (queue_depth > 1) 966 dev->flags &= ~ATA_DFLAG_NCQ_OFF; 967 else 968 dev->flags |= ATA_DFLAG_NCQ_OFF; 969 spin_unlock_irqrestore(ap->lock, flags); 970 971 return queue_depth; 972 } 973 974 /** 975 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command 976 * @qc: Storage for translated ATA taskfile 977 * 978 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY 979 * (to start). Perhaps these commands should be preceded by 980 * CHECK POWER MODE to see what power mode the device is already in. 981 * [See SAT revision 5 at www.t10.org] 982 * 983 * LOCKING: 984 * spin_lock_irqsave(host lock) 985 * 986 * RETURNS: 987 * Zero on success, non-zero on error. 988 */ 989 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) 990 { 991 struct scsi_cmnd *scmd = qc->scsicmd; 992 struct ata_taskfile *tf = &qc->tf; 993 const u8 *cdb = scmd->cmnd; 994 995 if (scmd->cmd_len < 5) 996 goto invalid_fld; 997 998 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 999 tf->protocol = ATA_PROT_NODATA; 1000 if (cdb[1] & 0x1) { 1001 ; /* ignore IMMED bit, violates sat-r05 */ 1002 } 1003 if (cdb[4] & 0x2) 1004 goto invalid_fld; /* LOEJ bit set not supported */ 1005 if (((cdb[4] >> 4) & 0xf) != 0) 1006 goto invalid_fld; /* power conditions not supported */ 1007 if (cdb[4] & 0x1) { 1008 tf->nsect = 1; /* 1 sector, lba=0 */ 1009 1010 if (qc->dev->flags & ATA_DFLAG_LBA) { 1011 tf->flags |= ATA_TFLAG_LBA; 1012 1013 tf->lbah = 0x0; 1014 tf->lbam = 0x0; 1015 tf->lbal = 0x0; 1016 tf->device |= ATA_LBA; 1017 } else { 1018 /* CHS */ 1019 tf->lbal = 0x1; /* sect */ 1020 tf->lbam = 0x0; /* cyl low */ 1021 tf->lbah = 0x0; /* cyl high */ 1022 } 1023 1024 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ 1025 } else 1026 /* Issue ATA STANDBY IMMEDIATE command */ 1027 tf->command = ATA_CMD_STANDBYNOW1; 1028 1029 /* 1030 * Standby and Idle condition timers could be implemented but that 1031 * would require libata to implement the Power condition mode page 1032 * and allow the user to change it. Changing mode pages requires 1033 * MODE SELECT to be implemented. 1034 */ 1035 1036 return 0; 1037 1038 invalid_fld: 1039 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1040 /* "Invalid field in cbd" */ 1041 return 1; 1042 } 1043 1044 1045 /** 1046 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command 1047 * @qc: Storage for translated ATA taskfile 1048 * 1049 * Sets up an ATA taskfile to issue FLUSH CACHE or 1050 * FLUSH CACHE EXT. 1051 * 1052 * LOCKING: 1053 * spin_lock_irqsave(host lock) 1054 * 1055 * RETURNS: 1056 * Zero on success, non-zero on error. 1057 */ 1058 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) 1059 { 1060 struct ata_taskfile *tf = &qc->tf; 1061 1062 tf->flags |= ATA_TFLAG_DEVICE; 1063 tf->protocol = ATA_PROT_NODATA; 1064 1065 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT) 1066 tf->command = ATA_CMD_FLUSH_EXT; 1067 else 1068 tf->command = ATA_CMD_FLUSH; 1069 1070 return 0; 1071 } 1072 1073 /** 1074 * scsi_6_lba_len - Get LBA and transfer length 1075 * @cdb: SCSI command to translate 1076 * 1077 * Calculate LBA and transfer length for 6-byte commands. 1078 * 1079 * RETURNS: 1080 * @plba: the LBA 1081 * @plen: the transfer length 1082 */ 1083 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1084 { 1085 u64 lba = 0; 1086 u32 len = 0; 1087 1088 VPRINTK("six-byte command\n"); 1089 1090 lba |= ((u64)cdb[2]) << 8; 1091 lba |= ((u64)cdb[3]); 1092 1093 len |= ((u32)cdb[4]); 1094 1095 *plba = lba; 1096 *plen = len; 1097 } 1098 1099 /** 1100 * scsi_10_lba_len - Get LBA and transfer length 1101 * @cdb: SCSI command to translate 1102 * 1103 * Calculate LBA and transfer length for 10-byte commands. 1104 * 1105 * RETURNS: 1106 * @plba: the LBA 1107 * @plen: the transfer length 1108 */ 1109 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1110 { 1111 u64 lba = 0; 1112 u32 len = 0; 1113 1114 VPRINTK("ten-byte command\n"); 1115 1116 lba |= ((u64)cdb[2]) << 24; 1117 lba |= ((u64)cdb[3]) << 16; 1118 lba |= ((u64)cdb[4]) << 8; 1119 lba |= ((u64)cdb[5]); 1120 1121 len |= ((u32)cdb[7]) << 8; 1122 len |= ((u32)cdb[8]); 1123 1124 *plba = lba; 1125 *plen = len; 1126 } 1127 1128 /** 1129 * scsi_16_lba_len - Get LBA and transfer length 1130 * @cdb: SCSI command to translate 1131 * 1132 * Calculate LBA and transfer length for 16-byte commands. 1133 * 1134 * RETURNS: 1135 * @plba: the LBA 1136 * @plen: the transfer length 1137 */ 1138 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) 1139 { 1140 u64 lba = 0; 1141 u32 len = 0; 1142 1143 VPRINTK("sixteen-byte command\n"); 1144 1145 lba |= ((u64)cdb[2]) << 56; 1146 lba |= ((u64)cdb[3]) << 48; 1147 lba |= ((u64)cdb[4]) << 40; 1148 lba |= ((u64)cdb[5]) << 32; 1149 lba |= ((u64)cdb[6]) << 24; 1150 lba |= ((u64)cdb[7]) << 16; 1151 lba |= ((u64)cdb[8]) << 8; 1152 lba |= ((u64)cdb[9]); 1153 1154 len |= ((u32)cdb[10]) << 24; 1155 len |= ((u32)cdb[11]) << 16; 1156 len |= ((u32)cdb[12]) << 8; 1157 len |= ((u32)cdb[13]); 1158 1159 *plba = lba; 1160 *plen = len; 1161 } 1162 1163 /** 1164 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one 1165 * @qc: Storage for translated ATA taskfile 1166 * 1167 * Converts SCSI VERIFY command to an ATA READ VERIFY command. 1168 * 1169 * LOCKING: 1170 * spin_lock_irqsave(host lock) 1171 * 1172 * RETURNS: 1173 * Zero on success, non-zero on error. 1174 */ 1175 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) 1176 { 1177 struct scsi_cmnd *scmd = qc->scsicmd; 1178 struct ata_taskfile *tf = &qc->tf; 1179 struct ata_device *dev = qc->dev; 1180 u64 dev_sectors = qc->dev->n_sectors; 1181 const u8 *cdb = scmd->cmnd; 1182 u64 block; 1183 u32 n_block; 1184 1185 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1186 tf->protocol = ATA_PROT_NODATA; 1187 1188 if (cdb[0] == VERIFY) { 1189 if (scmd->cmd_len < 10) 1190 goto invalid_fld; 1191 scsi_10_lba_len(cdb, &block, &n_block); 1192 } else if (cdb[0] == VERIFY_16) { 1193 if (scmd->cmd_len < 16) 1194 goto invalid_fld; 1195 scsi_16_lba_len(cdb, &block, &n_block); 1196 } else 1197 goto invalid_fld; 1198 1199 if (!n_block) 1200 goto nothing_to_do; 1201 if (block >= dev_sectors) 1202 goto out_of_range; 1203 if ((block + n_block) > dev_sectors) 1204 goto out_of_range; 1205 1206 if (dev->flags & ATA_DFLAG_LBA) { 1207 tf->flags |= ATA_TFLAG_LBA; 1208 1209 if (lba_28_ok(block, n_block)) { 1210 /* use LBA28 */ 1211 tf->command = ATA_CMD_VERIFY; 1212 tf->device |= (block >> 24) & 0xf; 1213 } else if (lba_48_ok(block, n_block)) { 1214 if (!(dev->flags & ATA_DFLAG_LBA48)) 1215 goto out_of_range; 1216 1217 /* use LBA48 */ 1218 tf->flags |= ATA_TFLAG_LBA48; 1219 tf->command = ATA_CMD_VERIFY_EXT; 1220 1221 tf->hob_nsect = (n_block >> 8) & 0xff; 1222 1223 tf->hob_lbah = (block >> 40) & 0xff; 1224 tf->hob_lbam = (block >> 32) & 0xff; 1225 tf->hob_lbal = (block >> 24) & 0xff; 1226 } else 1227 /* request too large even for LBA48 */ 1228 goto out_of_range; 1229 1230 tf->nsect = n_block & 0xff; 1231 1232 tf->lbah = (block >> 16) & 0xff; 1233 tf->lbam = (block >> 8) & 0xff; 1234 tf->lbal = block & 0xff; 1235 1236 tf->device |= ATA_LBA; 1237 } else { 1238 /* CHS */ 1239 u32 sect, head, cyl, track; 1240 1241 if (!lba_28_ok(block, n_block)) 1242 goto out_of_range; 1243 1244 /* Convert LBA to CHS */ 1245 track = (u32)block / dev->sectors; 1246 cyl = track / dev->heads; 1247 head = track % dev->heads; 1248 sect = (u32)block % dev->sectors + 1; 1249 1250 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 1251 (u32)block, track, cyl, head, sect); 1252 1253 /* Check whether the converted CHS can fit. 1254 Cylinder: 0-65535 1255 Head: 0-15 1256 Sector: 1-255*/ 1257 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 1258 goto out_of_range; 1259 1260 tf->command = ATA_CMD_VERIFY; 1261 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 1262 tf->lbal = sect; 1263 tf->lbam = cyl; 1264 tf->lbah = cyl >> 8; 1265 tf->device |= head; 1266 } 1267 1268 return 0; 1269 1270 invalid_fld: 1271 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1272 /* "Invalid field in cbd" */ 1273 return 1; 1274 1275 out_of_range: 1276 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1277 /* "Logical Block Address out of range" */ 1278 return 1; 1279 1280 nothing_to_do: 1281 scmd->result = SAM_STAT_GOOD; 1282 return 1; 1283 } 1284 1285 /** 1286 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one 1287 * @qc: Storage for translated ATA taskfile 1288 * 1289 * Converts any of six SCSI read/write commands into the 1290 * ATA counterpart, including starting sector (LBA), 1291 * sector count, and taking into account the device's LBA48 1292 * support. 1293 * 1294 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and 1295 * %WRITE_16 are currently supported. 1296 * 1297 * LOCKING: 1298 * spin_lock_irqsave(host lock) 1299 * 1300 * RETURNS: 1301 * Zero on success, non-zero on error. 1302 */ 1303 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) 1304 { 1305 struct scsi_cmnd *scmd = qc->scsicmd; 1306 const u8 *cdb = scmd->cmnd; 1307 unsigned int tf_flags = 0; 1308 u64 block; 1309 u32 n_block; 1310 int rc; 1311 1312 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) 1313 tf_flags |= ATA_TFLAG_WRITE; 1314 1315 /* Calculate the SCSI LBA, transfer length and FUA. */ 1316 switch (cdb[0]) { 1317 case READ_10: 1318 case WRITE_10: 1319 if (unlikely(scmd->cmd_len < 10)) 1320 goto invalid_fld; 1321 scsi_10_lba_len(cdb, &block, &n_block); 1322 if (unlikely(cdb[1] & (1 << 3))) 1323 tf_flags |= ATA_TFLAG_FUA; 1324 break; 1325 case READ_6: 1326 case WRITE_6: 1327 if (unlikely(scmd->cmd_len < 6)) 1328 goto invalid_fld; 1329 scsi_6_lba_len(cdb, &block, &n_block); 1330 1331 /* for 6-byte r/w commands, transfer length 0 1332 * means 256 blocks of data, not 0 block. 1333 */ 1334 if (!n_block) 1335 n_block = 256; 1336 break; 1337 case READ_16: 1338 case WRITE_16: 1339 if (unlikely(scmd->cmd_len < 16)) 1340 goto invalid_fld; 1341 scsi_16_lba_len(cdb, &block, &n_block); 1342 if (unlikely(cdb[1] & (1 << 3))) 1343 tf_flags |= ATA_TFLAG_FUA; 1344 break; 1345 default: 1346 DPRINTK("no-byte command\n"); 1347 goto invalid_fld; 1348 } 1349 1350 /* Check and compose ATA command */ 1351 if (!n_block) 1352 /* For 10-byte and 16-byte SCSI R/W commands, transfer 1353 * length 0 means transfer 0 block of data. 1354 * However, for ATA R/W commands, sector count 0 means 1355 * 256 or 65536 sectors, not 0 sectors as in SCSI. 1356 * 1357 * WARNING: one or two older ATA drives treat 0 as 0... 1358 */ 1359 goto nothing_to_do; 1360 1361 qc->flags |= ATA_QCFLAG_IO; 1362 qc->nsect = n_block; 1363 1364 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, 1365 qc->tag); 1366 if (likely(rc == 0)) 1367 return 0; 1368 1369 if (rc == -ERANGE) 1370 goto out_of_range; 1371 /* treat all other errors as -EINVAL, fall through */ 1372 invalid_fld: 1373 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0); 1374 /* "Invalid field in cbd" */ 1375 return 1; 1376 1377 out_of_range: 1378 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0); 1379 /* "Logical Block Address out of range" */ 1380 return 1; 1381 1382 nothing_to_do: 1383 scmd->result = SAM_STAT_GOOD; 1384 return 1; 1385 } 1386 1387 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) 1388 { 1389 struct ata_port *ap = qc->ap; 1390 struct scsi_cmnd *cmd = qc->scsicmd; 1391 u8 *cdb = cmd->cmnd; 1392 int need_sense = (qc->err_mask != 0); 1393 1394 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and 1395 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE 1396 * cache 1397 */ 1398 if (ap->ops->error_handler && 1399 !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) && 1400 ((qc->tf.feature == SETFEATURES_WC_ON) || 1401 (qc->tf.feature == SETFEATURES_WC_OFF))) { 1402 ap->eh_info.action |= ATA_EH_REVALIDATE; 1403 ata_port_schedule_eh(ap); 1404 } 1405 1406 /* For ATA pass thru (SAT) commands, generate a sense block if 1407 * user mandated it or if there's an error. Note that if we 1408 * generate because the user forced us to, a check condition 1409 * is generated and the ATA register values are returned 1410 * whether the command completed successfully or not. If there 1411 * was no error, SK, ASC and ASCQ will all be zero. 1412 */ 1413 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && 1414 ((cdb[2] & 0x20) || need_sense)) { 1415 ata_gen_passthru_sense(qc); 1416 } else { 1417 if (!need_sense) { 1418 cmd->result = SAM_STAT_GOOD; 1419 } else { 1420 /* TODO: decide which descriptor format to use 1421 * for 48b LBA devices and call that here 1422 * instead of the fixed desc, which is only 1423 * good for smaller LBA (and maybe CHS?) 1424 * devices. 1425 */ 1426 ata_gen_ata_sense(qc); 1427 } 1428 } 1429 1430 if (need_sense && !ap->ops->error_handler) 1431 ata_dump_status(ap->id, &qc->result_tf); 1432 1433 qc->scsidone(cmd); 1434 1435 ata_qc_free(qc); 1436 } 1437 1438 /** 1439 * ata_scmd_need_defer - Check whether we need to defer scmd 1440 * @dev: ATA device to which the command is addressed 1441 * @is_io: Is the command IO (and thus possibly NCQ)? 1442 * 1443 * NCQ and non-NCQ commands cannot run together. As upper layer 1444 * only knows the queue depth, we are responsible for maintaining 1445 * exclusion. This function checks whether a new command can be 1446 * issued to @dev. 1447 * 1448 * LOCKING: 1449 * spin_lock_irqsave(host lock) 1450 * 1451 * RETURNS: 1452 * 1 if deferring is needed, 0 otherwise. 1453 */ 1454 static int ata_scmd_need_defer(struct ata_device *dev, int is_io) 1455 { 1456 struct ata_port *ap = dev->ap; 1457 1458 if (!(dev->flags & ATA_DFLAG_NCQ)) 1459 return 0; 1460 1461 if (is_io) { 1462 if (!ata_tag_valid(ap->active_tag)) 1463 return 0; 1464 } else { 1465 if (!ata_tag_valid(ap->active_tag) && !ap->sactive) 1466 return 0; 1467 } 1468 return 1; 1469 } 1470 1471 /** 1472 * ata_scsi_translate - Translate then issue SCSI command to ATA device 1473 * @dev: ATA device to which the command is addressed 1474 * @cmd: SCSI command to execute 1475 * @done: SCSI command completion function 1476 * @xlat_func: Actor which translates @cmd to an ATA taskfile 1477 * 1478 * Our ->queuecommand() function has decided that the SCSI 1479 * command issued can be directly translated into an ATA 1480 * command, rather than handled internally. 1481 * 1482 * This function sets up an ata_queued_cmd structure for the 1483 * SCSI command, and sends that ata_queued_cmd to the hardware. 1484 * 1485 * The xlat_func argument (actor) returns 0 if ready to execute 1486 * ATA command, else 1 to finish translation. If 1 is returned 1487 * then cmd->result (and possibly cmd->sense_buffer) are assumed 1488 * to be set reflecting an error condition or clean (early) 1489 * termination. 1490 * 1491 * LOCKING: 1492 * spin_lock_irqsave(host lock) 1493 * 1494 * RETURNS: 1495 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command 1496 * needs to be deferred. 1497 */ 1498 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, 1499 void (*done)(struct scsi_cmnd *), 1500 ata_xlat_func_t xlat_func) 1501 { 1502 struct ata_queued_cmd *qc; 1503 int is_io = xlat_func == ata_scsi_rw_xlat; 1504 1505 VPRINTK("ENTER\n"); 1506 1507 if (unlikely(ata_scmd_need_defer(dev, is_io))) 1508 goto defer; 1509 1510 qc = ata_scsi_qc_new(dev, cmd, done); 1511 if (!qc) 1512 goto err_mem; 1513 1514 /* data is present; dma-map it */ 1515 if (cmd->sc_data_direction == DMA_FROM_DEVICE || 1516 cmd->sc_data_direction == DMA_TO_DEVICE) { 1517 if (unlikely(cmd->request_bufflen < 1)) { 1518 ata_dev_printk(dev, KERN_WARNING, 1519 "WARNING: zero len r/w req\n"); 1520 goto err_did; 1521 } 1522 1523 if (cmd->use_sg) 1524 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); 1525 else 1526 ata_sg_init_one(qc, cmd->request_buffer, 1527 cmd->request_bufflen); 1528 1529 qc->dma_dir = cmd->sc_data_direction; 1530 } 1531 1532 qc->complete_fn = ata_scsi_qc_complete; 1533 1534 if (xlat_func(qc)) 1535 goto early_finish; 1536 1537 /* select device, send command to hardware */ 1538 ata_qc_issue(qc); 1539 1540 VPRINTK("EXIT\n"); 1541 return 0; 1542 1543 early_finish: 1544 ata_qc_free(qc); 1545 done(cmd); 1546 DPRINTK("EXIT - early finish (good or error)\n"); 1547 return 0; 1548 1549 err_did: 1550 ata_qc_free(qc); 1551 cmd->result = (DID_ERROR << 16); 1552 done(cmd); 1553 err_mem: 1554 DPRINTK("EXIT - internal\n"); 1555 return 0; 1556 1557 defer: 1558 DPRINTK("EXIT - defer\n"); 1559 return SCSI_MLQUEUE_DEVICE_BUSY; 1560 } 1561 1562 /** 1563 * ata_scsi_rbuf_get - Map response buffer. 1564 * @cmd: SCSI command containing buffer to be mapped. 1565 * @buf_out: Pointer to mapped area. 1566 * 1567 * Maps buffer contained within SCSI command @cmd. 1568 * 1569 * LOCKING: 1570 * spin_lock_irqsave(host lock) 1571 * 1572 * RETURNS: 1573 * Length of response buffer. 1574 */ 1575 1576 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) 1577 { 1578 u8 *buf; 1579 unsigned int buflen; 1580 1581 if (cmd->use_sg) { 1582 struct scatterlist *sg; 1583 1584 sg = (struct scatterlist *) cmd->request_buffer; 1585 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset; 1586 buflen = sg->length; 1587 } else { 1588 buf = cmd->request_buffer; 1589 buflen = cmd->request_bufflen; 1590 } 1591 1592 *buf_out = buf; 1593 return buflen; 1594 } 1595 1596 /** 1597 * ata_scsi_rbuf_put - Unmap response buffer. 1598 * @cmd: SCSI command containing buffer to be unmapped. 1599 * @buf: buffer to unmap 1600 * 1601 * Unmaps response buffer contained within @cmd. 1602 * 1603 * LOCKING: 1604 * spin_lock_irqsave(host lock) 1605 */ 1606 1607 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) 1608 { 1609 if (cmd->use_sg) { 1610 struct scatterlist *sg; 1611 1612 sg = (struct scatterlist *) cmd->request_buffer; 1613 kunmap_atomic(buf - sg->offset, KM_IRQ0); 1614 } 1615 } 1616 1617 /** 1618 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators 1619 * @args: device IDENTIFY data / SCSI command of interest. 1620 * @actor: Callback hook for desired SCSI command simulator 1621 * 1622 * Takes care of the hard work of simulating a SCSI command... 1623 * Mapping the response buffer, calling the command's handler, 1624 * and handling the handler's return value. This return value 1625 * indicates whether the handler wishes the SCSI command to be 1626 * completed successfully (0), or not (in which case cmd->result 1627 * and sense buffer are assumed to be set). 1628 * 1629 * LOCKING: 1630 * spin_lock_irqsave(host lock) 1631 */ 1632 1633 void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 1634 unsigned int (*actor) (struct ata_scsi_args *args, 1635 u8 *rbuf, unsigned int buflen)) 1636 { 1637 u8 *rbuf; 1638 unsigned int buflen, rc; 1639 struct scsi_cmnd *cmd = args->cmd; 1640 1641 buflen = ata_scsi_rbuf_get(cmd, &rbuf); 1642 memset(rbuf, 0, buflen); 1643 rc = actor(args, rbuf, buflen); 1644 ata_scsi_rbuf_put(cmd, rbuf); 1645 1646 if (rc == 0) 1647 cmd->result = SAM_STAT_GOOD; 1648 args->done(cmd); 1649 } 1650 1651 /** 1652 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer 1653 * @idx: byte index into SCSI response buffer 1654 * @val: value to set 1655 * 1656 * To be used by SCSI command simulator functions. This macros 1657 * expects two local variables, u8 *rbuf and unsigned int buflen, 1658 * are in scope. 1659 * 1660 * LOCKING: 1661 * None. 1662 */ 1663 #define ATA_SCSI_RBUF_SET(idx, val) do { \ 1664 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \ 1665 } while (0) 1666 1667 /** 1668 * ata_scsiop_inq_std - Simulate INQUIRY command 1669 * @args: device IDENTIFY data / SCSI command of interest. 1670 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1671 * @buflen: Response buffer length. 1672 * 1673 * Returns standard device identification data associated 1674 * with non-VPD INQUIRY command output. 1675 * 1676 * LOCKING: 1677 * spin_lock_irqsave(host lock) 1678 */ 1679 1680 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, 1681 unsigned int buflen) 1682 { 1683 u8 hdr[] = { 1684 TYPE_DISK, 1685 0, 1686 0x5, /* claim SPC-3 version compatibility */ 1687 2, 1688 95 - 4 1689 }; 1690 1691 /* set scsi removeable (RMB) bit per ata bit */ 1692 if (ata_id_removeable(args->id)) 1693 hdr[1] |= (1 << 7); 1694 1695 VPRINTK("ENTER\n"); 1696 1697 memcpy(rbuf, hdr, sizeof(hdr)); 1698 1699 if (buflen > 35) { 1700 memcpy(&rbuf[8], "ATA ", 8); 1701 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); 1702 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); 1703 if (rbuf[32] == 0 || rbuf[32] == ' ') 1704 memcpy(&rbuf[32], "n/a ", 4); 1705 } 1706 1707 if (buflen > 63) { 1708 const u8 versions[] = { 1709 0x60, /* SAM-3 (no version claimed) */ 1710 1711 0x03, 1712 0x20, /* SBC-2 (no version claimed) */ 1713 1714 0x02, 1715 0x60 /* SPC-3 (no version claimed) */ 1716 }; 1717 1718 memcpy(rbuf + 59, versions, sizeof(versions)); 1719 } 1720 1721 return 0; 1722 } 1723 1724 /** 1725 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages 1726 * @args: device IDENTIFY data / SCSI command of interest. 1727 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1728 * @buflen: Response buffer length. 1729 * 1730 * Returns list of inquiry VPD pages available. 1731 * 1732 * LOCKING: 1733 * spin_lock_irqsave(host lock) 1734 */ 1735 1736 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, 1737 unsigned int buflen) 1738 { 1739 const u8 pages[] = { 1740 0x00, /* page 0x00, this page */ 1741 0x80, /* page 0x80, unit serial no page */ 1742 0x83 /* page 0x83, device ident page */ 1743 }; 1744 rbuf[3] = sizeof(pages); /* number of supported VPD pages */ 1745 1746 if (buflen > 6) 1747 memcpy(rbuf + 4, pages, sizeof(pages)); 1748 1749 return 0; 1750 } 1751 1752 /** 1753 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number 1754 * @args: device IDENTIFY data / SCSI command of interest. 1755 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1756 * @buflen: Response buffer length. 1757 * 1758 * Returns ATA device serial number. 1759 * 1760 * LOCKING: 1761 * spin_lock_irqsave(host lock) 1762 */ 1763 1764 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, 1765 unsigned int buflen) 1766 { 1767 const u8 hdr[] = { 1768 0, 1769 0x80, /* this page code */ 1770 0, 1771 ATA_SERNO_LEN, /* page len */ 1772 }; 1773 memcpy(rbuf, hdr, sizeof(hdr)); 1774 1775 if (buflen > (ATA_SERNO_LEN + 4 - 1)) 1776 ata_id_string(args->id, (unsigned char *) &rbuf[4], 1777 ATA_ID_SERNO_OFS, ATA_SERNO_LEN); 1778 1779 return 0; 1780 } 1781 1782 /** 1783 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity 1784 * @args: device IDENTIFY data / SCSI command of interest. 1785 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1786 * @buflen: Response buffer length. 1787 * 1788 * Yields two logical unit device identification designators: 1789 * - vendor specific ASCII containing the ATA serial number 1790 * - SAT defined "t10 vendor id based" containing ASCII vendor 1791 * name ("ATA "), model and serial numbers. 1792 * 1793 * LOCKING: 1794 * spin_lock_irqsave(host lock) 1795 */ 1796 1797 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, 1798 unsigned int buflen) 1799 { 1800 int num; 1801 const int sat_model_serial_desc_len = 68; 1802 const int ata_model_byte_len = 40; 1803 1804 rbuf[1] = 0x83; /* this page code */ 1805 num = 4; 1806 1807 if (buflen > (ATA_SERNO_LEN + num + 3)) { 1808 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ 1809 rbuf[num + 0] = 2; 1810 rbuf[num + 3] = ATA_SERNO_LEN; 1811 num += 4; 1812 ata_id_string(args->id, (unsigned char *) rbuf + num, 1813 ATA_ID_SERNO_OFS, ATA_SERNO_LEN); 1814 num += ATA_SERNO_LEN; 1815 } 1816 if (buflen > (sat_model_serial_desc_len + num + 3)) { 1817 /* SAT defined lu model and serial numbers descriptor */ 1818 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ 1819 rbuf[num + 0] = 2; 1820 rbuf[num + 1] = 1; 1821 rbuf[num + 3] = sat_model_serial_desc_len; 1822 num += 4; 1823 memcpy(rbuf + num, "ATA ", 8); 1824 num += 8; 1825 ata_id_string(args->id, (unsigned char *) rbuf + num, 1826 ATA_ID_PROD_OFS, ata_model_byte_len); 1827 num += ata_model_byte_len; 1828 ata_id_string(args->id, (unsigned char *) rbuf + num, 1829 ATA_ID_SERNO_OFS, ATA_SERNO_LEN); 1830 num += ATA_SERNO_LEN; 1831 } 1832 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ 1833 return 0; 1834 } 1835 1836 /** 1837 * ata_scsiop_noop - Command handler that simply returns success. 1838 * @args: device IDENTIFY data / SCSI command of interest. 1839 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1840 * @buflen: Response buffer length. 1841 * 1842 * No operation. Simply returns success to caller, to indicate 1843 * that the caller should successfully complete this SCSI command. 1844 * 1845 * LOCKING: 1846 * spin_lock_irqsave(host lock) 1847 */ 1848 1849 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, 1850 unsigned int buflen) 1851 { 1852 VPRINTK("ENTER\n"); 1853 return 0; 1854 } 1855 1856 /** 1857 * ata_msense_push - Push data onto MODE SENSE data output buffer 1858 * @ptr_io: (input/output) Location to store more output data 1859 * @last: End of output data buffer 1860 * @buf: Pointer to BLOB being added to output buffer 1861 * @buflen: Length of BLOB 1862 * 1863 * Store MODE SENSE data on an output buffer. 1864 * 1865 * LOCKING: 1866 * None. 1867 */ 1868 1869 static void ata_msense_push(u8 **ptr_io, const u8 *last, 1870 const u8 *buf, unsigned int buflen) 1871 { 1872 u8 *ptr = *ptr_io; 1873 1874 if ((ptr + buflen - 1) > last) 1875 return; 1876 1877 memcpy(ptr, buf, buflen); 1878 1879 ptr += buflen; 1880 1881 *ptr_io = ptr; 1882 } 1883 1884 /** 1885 * ata_msense_caching - Simulate MODE SENSE caching info page 1886 * @id: device IDENTIFY data 1887 * @ptr_io: (input/output) Location to store more output data 1888 * @last: End of output data buffer 1889 * 1890 * Generate a caching info page, which conditionally indicates 1891 * write caching to the SCSI layer, depending on device 1892 * capabilities. 1893 * 1894 * LOCKING: 1895 * None. 1896 */ 1897 1898 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, 1899 const u8 *last) 1900 { 1901 u8 page[CACHE_MPAGE_LEN]; 1902 1903 memcpy(page, def_cache_mpage, sizeof(page)); 1904 if (ata_id_wcache_enabled(id)) 1905 page[2] |= (1 << 2); /* write cache enable */ 1906 if (!ata_id_rahead_enabled(id)) 1907 page[12] |= (1 << 5); /* disable read ahead */ 1908 1909 ata_msense_push(ptr_io, last, page, sizeof(page)); 1910 return sizeof(page); 1911 } 1912 1913 /** 1914 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page 1915 * @dev: Device associated with this MODE SENSE command 1916 * @ptr_io: (input/output) Location to store more output data 1917 * @last: End of output data buffer 1918 * 1919 * Generate a generic MODE SENSE control mode page. 1920 * 1921 * LOCKING: 1922 * None. 1923 */ 1924 1925 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) 1926 { 1927 ata_msense_push(ptr_io, last, def_control_mpage, 1928 sizeof(def_control_mpage)); 1929 return sizeof(def_control_mpage); 1930 } 1931 1932 /** 1933 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page 1934 * @dev: Device associated with this MODE SENSE command 1935 * @ptr_io: (input/output) Location to store more output data 1936 * @last: End of output data buffer 1937 * 1938 * Generate a generic MODE SENSE r/w error recovery page. 1939 * 1940 * LOCKING: 1941 * None. 1942 */ 1943 1944 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) 1945 { 1946 1947 ata_msense_push(ptr_io, last, def_rw_recovery_mpage, 1948 sizeof(def_rw_recovery_mpage)); 1949 return sizeof(def_rw_recovery_mpage); 1950 } 1951 1952 /* 1953 * We can turn this into a real blacklist if it's needed, for now just 1954 * blacklist any Maxtor BANC1G10 revision firmware 1955 */ 1956 static int ata_dev_supports_fua(u16 *id) 1957 { 1958 unsigned char model[41], fw[9]; 1959 1960 if (!libata_fua) 1961 return 0; 1962 if (!ata_id_has_fua(id)) 1963 return 0; 1964 1965 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model)); 1966 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw)); 1967 1968 if (strcmp(model, "Maxtor")) 1969 return 1; 1970 if (strcmp(fw, "BANC1G10")) 1971 return 1; 1972 1973 return 0; /* blacklisted */ 1974 } 1975 1976 /** 1977 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands 1978 * @args: device IDENTIFY data / SCSI command of interest. 1979 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 1980 * @buflen: Response buffer length. 1981 * 1982 * Simulate MODE SENSE commands. Assume this is invoked for direct 1983 * access devices (e.g. disks) only. There should be no block 1984 * descriptor for other device types. 1985 * 1986 * LOCKING: 1987 * spin_lock_irqsave(host lock) 1988 */ 1989 1990 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, 1991 unsigned int buflen) 1992 { 1993 struct ata_device *dev = args->dev; 1994 u8 *scsicmd = args->cmd->cmnd, *p, *last; 1995 const u8 sat_blk_desc[] = { 1996 0, 0, 0, 0, /* number of blocks: sat unspecified */ 1997 0, 1998 0, 0x2, 0x0 /* block length: 512 bytes */ 1999 }; 2000 u8 pg, spg; 2001 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; 2002 u8 dpofua; 2003 2004 VPRINTK("ENTER\n"); 2005 2006 six_byte = (scsicmd[0] == MODE_SENSE); 2007 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ 2008 /* 2009 * LLBA bit in msense(10) ignored (compliant) 2010 */ 2011 2012 page_control = scsicmd[2] >> 6; 2013 switch (page_control) { 2014 case 0: /* current */ 2015 break; /* supported */ 2016 case 3: /* saved */ 2017 goto saving_not_supp; 2018 case 1: /* changeable */ 2019 case 2: /* defaults */ 2020 default: 2021 goto invalid_fld; 2022 } 2023 2024 if (six_byte) { 2025 output_len = 4 + (ebd ? 8 : 0); 2026 alloc_len = scsicmd[4]; 2027 } else { 2028 output_len = 8 + (ebd ? 8 : 0); 2029 alloc_len = (scsicmd[7] << 8) + scsicmd[8]; 2030 } 2031 minlen = (alloc_len < buflen) ? alloc_len : buflen; 2032 2033 p = rbuf + output_len; 2034 last = rbuf + minlen - 1; 2035 2036 pg = scsicmd[2] & 0x3f; 2037 spg = scsicmd[3]; 2038 /* 2039 * No mode subpages supported (yet) but asking for _all_ 2040 * subpages may be valid 2041 */ 2042 if (spg && (spg != ALL_SUB_MPAGES)) 2043 goto invalid_fld; 2044 2045 switch(pg) { 2046 case RW_RECOVERY_MPAGE: 2047 output_len += ata_msense_rw_recovery(&p, last); 2048 break; 2049 2050 case CACHE_MPAGE: 2051 output_len += ata_msense_caching(args->id, &p, last); 2052 break; 2053 2054 case CONTROL_MPAGE: { 2055 output_len += ata_msense_ctl_mode(&p, last); 2056 break; 2057 } 2058 2059 case ALL_MPAGES: 2060 output_len += ata_msense_rw_recovery(&p, last); 2061 output_len += ata_msense_caching(args->id, &p, last); 2062 output_len += ata_msense_ctl_mode(&p, last); 2063 break; 2064 2065 default: /* invalid page code */ 2066 goto invalid_fld; 2067 } 2068 2069 if (minlen < 1) 2070 return 0; 2071 2072 dpofua = 0; 2073 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && 2074 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) 2075 dpofua = 1 << 4; 2076 2077 if (six_byte) { 2078 output_len--; 2079 rbuf[0] = output_len; 2080 if (minlen > 2) 2081 rbuf[2] |= dpofua; 2082 if (ebd) { 2083 if (minlen > 3) 2084 rbuf[3] = sizeof(sat_blk_desc); 2085 if (minlen > 11) 2086 memcpy(rbuf + 4, sat_blk_desc, 2087 sizeof(sat_blk_desc)); 2088 } 2089 } else { 2090 output_len -= 2; 2091 rbuf[0] = output_len >> 8; 2092 if (minlen > 1) 2093 rbuf[1] = output_len; 2094 if (minlen > 3) 2095 rbuf[3] |= dpofua; 2096 if (ebd) { 2097 if (minlen > 7) 2098 rbuf[7] = sizeof(sat_blk_desc); 2099 if (minlen > 15) 2100 memcpy(rbuf + 8, sat_blk_desc, 2101 sizeof(sat_blk_desc)); 2102 } 2103 } 2104 return 0; 2105 2106 invalid_fld: 2107 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); 2108 /* "Invalid field in cbd" */ 2109 return 1; 2110 2111 saving_not_supp: 2112 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); 2113 /* "Saving parameters not supported" */ 2114 return 1; 2115 } 2116 2117 /** 2118 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands 2119 * @args: device IDENTIFY data / SCSI command of interest. 2120 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2121 * @buflen: Response buffer length. 2122 * 2123 * Simulate READ CAPACITY commands. 2124 * 2125 * LOCKING: 2126 * None. 2127 */ 2128 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, 2129 unsigned int buflen) 2130 { 2131 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */ 2132 2133 VPRINTK("ENTER\n"); 2134 2135 if (args->cmd->cmnd[0] == READ_CAPACITY) { 2136 if (last_lba >= 0xffffffffULL) 2137 last_lba = 0xffffffff; 2138 2139 /* sector count, 32-bit */ 2140 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3)); 2141 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2)); 2142 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1)); 2143 ATA_SCSI_RBUF_SET(3, last_lba); 2144 2145 /* sector size */ 2146 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8); 2147 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE); 2148 } else { 2149 /* sector count, 64-bit */ 2150 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7)); 2151 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6)); 2152 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5)); 2153 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4)); 2154 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3)); 2155 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2)); 2156 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1)); 2157 ATA_SCSI_RBUF_SET(7, last_lba); 2158 2159 /* sector size */ 2160 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8); 2161 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE); 2162 } 2163 2164 return 0; 2165 } 2166 2167 /** 2168 * ata_scsiop_report_luns - Simulate REPORT LUNS command 2169 * @args: device IDENTIFY data / SCSI command of interest. 2170 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. 2171 * @buflen: Response buffer length. 2172 * 2173 * Simulate REPORT LUNS command. 2174 * 2175 * LOCKING: 2176 * spin_lock_irqsave(host lock) 2177 */ 2178 2179 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, 2180 unsigned int buflen) 2181 { 2182 VPRINTK("ENTER\n"); 2183 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ 2184 2185 return 0; 2186 } 2187 2188 /** 2189 * ata_scsi_set_sense - Set SCSI sense data and status 2190 * @cmd: SCSI request to be handled 2191 * @sk: SCSI-defined sense key 2192 * @asc: SCSI-defined additional sense code 2193 * @ascq: SCSI-defined additional sense code qualifier 2194 * 2195 * Helper function that builds a valid fixed format, current 2196 * response code and the given sense key (sk), additional sense 2197 * code (asc) and additional sense code qualifier (ascq) with 2198 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and 2199 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . 2200 * 2201 * LOCKING: 2202 * Not required 2203 */ 2204 2205 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) 2206 { 2207 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 2208 2209 cmd->sense_buffer[0] = 0x70; /* fixed format, current */ 2210 cmd->sense_buffer[2] = sk; 2211 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ 2212 cmd->sense_buffer[12] = asc; 2213 cmd->sense_buffer[13] = ascq; 2214 } 2215 2216 /** 2217 * ata_scsi_badcmd - End a SCSI request with an error 2218 * @cmd: SCSI request to be handled 2219 * @done: SCSI command completion function 2220 * @asc: SCSI-defined additional sense code 2221 * @ascq: SCSI-defined additional sense code qualifier 2222 * 2223 * Helper function that completes a SCSI command with 2224 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST 2225 * and the specified additional sense codes. 2226 * 2227 * LOCKING: 2228 * spin_lock_irqsave(host lock) 2229 */ 2230 2231 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) 2232 { 2233 DPRINTK("ENTER\n"); 2234 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); 2235 2236 done(cmd); 2237 } 2238 2239 static void atapi_sense_complete(struct ata_queued_cmd *qc) 2240 { 2241 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { 2242 /* FIXME: not quite right; we don't want the 2243 * translation of taskfile registers into 2244 * a sense descriptors, since that's only 2245 * correct for ATA, not ATAPI 2246 */ 2247 ata_gen_passthru_sense(qc); 2248 } 2249 2250 qc->scsidone(qc->scsicmd); 2251 ata_qc_free(qc); 2252 } 2253 2254 /* is it pointless to prefer PIO for "safety reasons"? */ 2255 static inline int ata_pio_use_silly(struct ata_port *ap) 2256 { 2257 return (ap->flags & ATA_FLAG_PIO_DMA); 2258 } 2259 2260 static void atapi_request_sense(struct ata_queued_cmd *qc) 2261 { 2262 struct ata_port *ap = qc->ap; 2263 struct scsi_cmnd *cmd = qc->scsicmd; 2264 2265 DPRINTK("ATAPI request sense\n"); 2266 2267 /* FIXME: is this needed? */ 2268 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); 2269 2270 ap->ops->tf_read(ap, &qc->tf); 2271 2272 /* fill these in, for the case where they are -not- overwritten */ 2273 cmd->sense_buffer[0] = 0x70; 2274 cmd->sense_buffer[2] = qc->tf.feature >> 4; 2275 2276 ata_qc_reinit(qc); 2277 2278 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); 2279 qc->dma_dir = DMA_FROM_DEVICE; 2280 2281 memset(&qc->cdb, 0, qc->dev->cdb_len); 2282 qc->cdb[0] = REQUEST_SENSE; 2283 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; 2284 2285 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2286 qc->tf.command = ATA_CMD_PACKET; 2287 2288 if (ata_pio_use_silly(ap)) { 2289 qc->tf.protocol = ATA_PROT_ATAPI_DMA; 2290 qc->tf.feature |= ATAPI_PKT_DMA; 2291 } else { 2292 qc->tf.protocol = ATA_PROT_ATAPI; 2293 qc->tf.lbam = (8 * 1024) & 0xff; 2294 qc->tf.lbah = (8 * 1024) >> 8; 2295 } 2296 qc->nbytes = SCSI_SENSE_BUFFERSIZE; 2297 2298 qc->complete_fn = atapi_sense_complete; 2299 2300 ata_qc_issue(qc); 2301 2302 DPRINTK("EXIT\n"); 2303 } 2304 2305 static void atapi_qc_complete(struct ata_queued_cmd *qc) 2306 { 2307 struct scsi_cmnd *cmd = qc->scsicmd; 2308 unsigned int err_mask = qc->err_mask; 2309 2310 VPRINTK("ENTER, err_mask 0x%X\n", err_mask); 2311 2312 /* handle completion from new EH */ 2313 if (unlikely(qc->ap->ops->error_handler && 2314 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { 2315 2316 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { 2317 /* FIXME: not quite right; we don't want the 2318 * translation of taskfile registers into a 2319 * sense descriptors, since that's only 2320 * correct for ATA, not ATAPI 2321 */ 2322 ata_gen_passthru_sense(qc); 2323 } 2324 2325 /* SCSI EH automatically locks door if sdev->locked is 2326 * set. Sometimes door lock request continues to 2327 * fail, for example, when no media is present. This 2328 * creates a loop - SCSI EH issues door lock which 2329 * fails and gets invoked again to acquire sense data 2330 * for the failed command. 2331 * 2332 * If door lock fails, always clear sdev->locked to 2333 * avoid this infinite loop. 2334 */ 2335 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL) 2336 qc->dev->sdev->locked = 0; 2337 2338 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; 2339 qc->scsidone(cmd); 2340 ata_qc_free(qc); 2341 return; 2342 } 2343 2344 /* successful completion or old EH failure path */ 2345 if (unlikely(err_mask & AC_ERR_DEV)) { 2346 cmd->result = SAM_STAT_CHECK_CONDITION; 2347 atapi_request_sense(qc); 2348 return; 2349 } else if (unlikely(err_mask)) { 2350 /* FIXME: not quite right; we don't want the 2351 * translation of taskfile registers into 2352 * a sense descriptors, since that's only 2353 * correct for ATA, not ATAPI 2354 */ 2355 ata_gen_passthru_sense(qc); 2356 } else { 2357 u8 *scsicmd = cmd->cmnd; 2358 2359 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { 2360 u8 *buf = NULL; 2361 unsigned int buflen; 2362 2363 buflen = ata_scsi_rbuf_get(cmd, &buf); 2364 2365 /* ATAPI devices typically report zero for their SCSI version, 2366 * and sometimes deviate from the spec WRT response data 2367 * format. If SCSI version is reported as zero like normal, 2368 * then we make the following fixups: 1) Fake MMC-5 version, 2369 * to indicate to the Linux scsi midlayer this is a modern 2370 * device. 2) Ensure response data format / ATAPI information 2371 * are always correct. 2372 */ 2373 if (buf[2] == 0) { 2374 buf[2] = 0x5; 2375 buf[3] = 0x32; 2376 } 2377 2378 ata_scsi_rbuf_put(cmd, buf); 2379 } 2380 2381 cmd->result = SAM_STAT_GOOD; 2382 } 2383 2384 qc->scsidone(cmd); 2385 ata_qc_free(qc); 2386 } 2387 /** 2388 * atapi_xlat - Initialize PACKET taskfile 2389 * @qc: command structure to be initialized 2390 * 2391 * LOCKING: 2392 * spin_lock_irqsave(host lock) 2393 * 2394 * RETURNS: 2395 * Zero on success, non-zero on failure. 2396 */ 2397 static unsigned int atapi_xlat(struct ata_queued_cmd *qc) 2398 { 2399 struct scsi_cmnd *scmd = qc->scsicmd; 2400 struct ata_device *dev = qc->dev; 2401 int using_pio = (dev->flags & ATA_DFLAG_PIO); 2402 int nodata = (scmd->sc_data_direction == DMA_NONE); 2403 2404 if (!using_pio) 2405 /* Check whether ATAPI DMA is safe */ 2406 if (ata_check_atapi_dma(qc)) 2407 using_pio = 1; 2408 2409 memset(qc->cdb, 0, dev->cdb_len); 2410 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len); 2411 2412 qc->complete_fn = atapi_qc_complete; 2413 2414 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 2415 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 2416 qc->tf.flags |= ATA_TFLAG_WRITE; 2417 DPRINTK("direction: write\n"); 2418 } 2419 2420 qc->tf.command = ATA_CMD_PACKET; 2421 2422 /* no data, or PIO data xfer */ 2423 if (using_pio || nodata) { 2424 if (nodata) 2425 qc->tf.protocol = ATA_PROT_ATAPI_NODATA; 2426 else 2427 qc->tf.protocol = ATA_PROT_ATAPI; 2428 qc->tf.lbam = (8 * 1024) & 0xff; 2429 qc->tf.lbah = (8 * 1024) >> 8; 2430 } 2431 2432 /* DMA data xfer */ 2433 else { 2434 qc->tf.protocol = ATA_PROT_ATAPI_DMA; 2435 qc->tf.feature |= ATAPI_PKT_DMA; 2436 2437 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE)) 2438 /* some SATA bridges need us to indicate data xfer direction */ 2439 qc->tf.feature |= ATAPI_DMADIR; 2440 } 2441 2442 qc->nbytes = scmd->request_bufflen; 2443 2444 return 0; 2445 } 2446 2447 static struct ata_device * ata_find_dev(struct ata_port *ap, int id) 2448 { 2449 if (likely(id < ATA_MAX_DEVICES)) 2450 return &ap->device[id]; 2451 return NULL; 2452 } 2453 2454 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, 2455 const struct scsi_device *scsidev) 2456 { 2457 /* skip commands not addressed to targets we simulate */ 2458 if (unlikely(scsidev->channel || scsidev->lun)) 2459 return NULL; 2460 2461 return ata_find_dev(ap, scsidev->id); 2462 } 2463 2464 /** 2465 * ata_scsi_dev_enabled - determine if device is enabled 2466 * @dev: ATA device 2467 * 2468 * Determine if commands should be sent to the specified device. 2469 * 2470 * LOCKING: 2471 * spin_lock_irqsave(host lock) 2472 * 2473 * RETURNS: 2474 * 0 if commands are not allowed / 1 if commands are allowed 2475 */ 2476 2477 static int ata_scsi_dev_enabled(struct ata_device *dev) 2478 { 2479 if (unlikely(!ata_dev_enabled(dev))) 2480 return 0; 2481 2482 if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) { 2483 if (unlikely(dev->class == ATA_DEV_ATAPI)) { 2484 ata_dev_printk(dev, KERN_WARNING, 2485 "WARNING: ATAPI is %s, device ignored.\n", 2486 atapi_enabled ? "not supported with this driver" : "disabled"); 2487 return 0; 2488 } 2489 } 2490 2491 return 1; 2492 } 2493 2494 /** 2495 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd 2496 * @ap: ATA port to which the device is attached 2497 * @scsidev: SCSI device from which we derive the ATA device 2498 * 2499 * Given various information provided in struct scsi_cmnd, 2500 * map that onto an ATA bus, and using that mapping 2501 * determine which ata_device is associated with the 2502 * SCSI command to be sent. 2503 * 2504 * LOCKING: 2505 * spin_lock_irqsave(host lock) 2506 * 2507 * RETURNS: 2508 * Associated ATA device, or %NULL if not found. 2509 */ 2510 static struct ata_device * 2511 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) 2512 { 2513 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); 2514 2515 if (unlikely(!dev || !ata_scsi_dev_enabled(dev))) 2516 return NULL; 2517 2518 return dev; 2519 } 2520 2521 /* 2522 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. 2523 * @byte1: Byte 1 from pass-thru CDB. 2524 * 2525 * RETURNS: 2526 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. 2527 */ 2528 static u8 2529 ata_scsi_map_proto(u8 byte1) 2530 { 2531 switch((byte1 & 0x1e) >> 1) { 2532 case 3: /* Non-data */ 2533 return ATA_PROT_NODATA; 2534 2535 case 6: /* DMA */ 2536 return ATA_PROT_DMA; 2537 2538 case 4: /* PIO Data-in */ 2539 case 5: /* PIO Data-out */ 2540 return ATA_PROT_PIO; 2541 2542 case 10: /* Device Reset */ 2543 case 0: /* Hard Reset */ 2544 case 1: /* SRST */ 2545 case 2: /* Bus Idle */ 2546 case 7: /* Packet */ 2547 case 8: /* DMA Queued */ 2548 case 9: /* Device Diagnostic */ 2549 case 11: /* UDMA Data-in */ 2550 case 12: /* UDMA Data-Out */ 2551 case 13: /* FPDMA */ 2552 default: /* Reserved */ 2553 break; 2554 } 2555 2556 return ATA_PROT_UNKNOWN; 2557 } 2558 2559 /** 2560 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile 2561 * @qc: command structure to be initialized 2562 * 2563 * Handles either 12 or 16-byte versions of the CDB. 2564 * 2565 * RETURNS: 2566 * Zero on success, non-zero on failure. 2567 */ 2568 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) 2569 { 2570 struct ata_taskfile *tf = &(qc->tf); 2571 struct scsi_cmnd *scmd = qc->scsicmd; 2572 struct ata_device *dev = qc->dev; 2573 const u8 *cdb = scmd->cmnd; 2574 2575 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) 2576 goto invalid_fld; 2577 2578 /* We may not issue DMA commands if no DMA mode is set */ 2579 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) 2580 goto invalid_fld; 2581 2582 if (cdb[1] & 0xe0) 2583 /* PIO multi not supported yet */ 2584 goto invalid_fld; 2585 2586 /* 2587 * 12 and 16 byte CDBs use different offsets to 2588 * provide the various register values. 2589 */ 2590 if (cdb[0] == ATA_16) { 2591 /* 2592 * 16-byte CDB - may contain extended commands. 2593 * 2594 * If that is the case, copy the upper byte register values. 2595 */ 2596 if (cdb[1] & 0x01) { 2597 tf->hob_feature = cdb[3]; 2598 tf->hob_nsect = cdb[5]; 2599 tf->hob_lbal = cdb[7]; 2600 tf->hob_lbam = cdb[9]; 2601 tf->hob_lbah = cdb[11]; 2602 tf->flags |= ATA_TFLAG_LBA48; 2603 } else 2604 tf->flags &= ~ATA_TFLAG_LBA48; 2605 2606 /* 2607 * Always copy low byte, device and command registers. 2608 */ 2609 tf->feature = cdb[4]; 2610 tf->nsect = cdb[6]; 2611 tf->lbal = cdb[8]; 2612 tf->lbam = cdb[10]; 2613 tf->lbah = cdb[12]; 2614 tf->device = cdb[13]; 2615 tf->command = cdb[14]; 2616 } else { 2617 /* 2618 * 12-byte CDB - incapable of extended commands. 2619 */ 2620 tf->flags &= ~ATA_TFLAG_LBA48; 2621 2622 tf->feature = cdb[3]; 2623 tf->nsect = cdb[4]; 2624 tf->lbal = cdb[5]; 2625 tf->lbam = cdb[6]; 2626 tf->lbah = cdb[7]; 2627 tf->device = cdb[8]; 2628 tf->command = cdb[9]; 2629 } 2630 /* 2631 * If slave is possible, enforce correct master/slave bit 2632 */ 2633 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS) 2634 tf->device = qc->dev->devno ? 2635 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; 2636 2637 /* 2638 * Filter SET_FEATURES - XFER MODE command -- otherwise, 2639 * SET_FEATURES - XFER MODE must be preceded/succeeded 2640 * by an update to hardware-specific registers for each 2641 * controller (i.e. the reason for ->set_piomode(), 2642 * ->set_dmamode(), and ->post_set_mode() hooks). 2643 */ 2644 if ((tf->command == ATA_CMD_SET_FEATURES) 2645 && (tf->feature == SETFEATURES_XFER)) 2646 goto invalid_fld; 2647 2648 /* 2649 * Set flags so that all registers will be written, 2650 * and pass on write indication (used for PIO/DMA 2651 * setup.) 2652 */ 2653 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); 2654 2655 if (scmd->sc_data_direction == DMA_TO_DEVICE) 2656 tf->flags |= ATA_TFLAG_WRITE; 2657 2658 /* 2659 * Set transfer length. 2660 * 2661 * TODO: find out if we need to do more here to 2662 * cover scatter/gather case. 2663 */ 2664 qc->nsect = scmd->request_bufflen / ATA_SECT_SIZE; 2665 2666 /* request result TF */ 2667 qc->flags |= ATA_QCFLAG_RESULT_TF; 2668 2669 return 0; 2670 2671 invalid_fld: 2672 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00); 2673 /* "Invalid field in cdb" */ 2674 return 1; 2675 } 2676 2677 /** 2678 * ata_get_xlat_func - check if SCSI to ATA translation is possible 2679 * @dev: ATA device 2680 * @cmd: SCSI command opcode to consider 2681 * 2682 * Look up the SCSI command given, and determine whether the 2683 * SCSI command is to be translated or simulated. 2684 * 2685 * RETURNS: 2686 * Pointer to translation function if possible, %NULL if not. 2687 */ 2688 2689 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) 2690 { 2691 switch (cmd) { 2692 case READ_6: 2693 case READ_10: 2694 case READ_16: 2695 2696 case WRITE_6: 2697 case WRITE_10: 2698 case WRITE_16: 2699 return ata_scsi_rw_xlat; 2700 2701 case SYNCHRONIZE_CACHE: 2702 if (ata_try_flush_cache(dev)) 2703 return ata_scsi_flush_xlat; 2704 break; 2705 2706 case VERIFY: 2707 case VERIFY_16: 2708 return ata_scsi_verify_xlat; 2709 2710 case ATA_12: 2711 case ATA_16: 2712 return ata_scsi_pass_thru; 2713 2714 case START_STOP: 2715 return ata_scsi_start_stop_xlat; 2716 } 2717 2718 return NULL; 2719 } 2720 2721 /** 2722 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg 2723 * @ap: ATA port to which the command was being sent 2724 * @cmd: SCSI command to dump 2725 * 2726 * Prints the contents of a SCSI command via printk(). 2727 */ 2728 2729 static inline void ata_scsi_dump_cdb(struct ata_port *ap, 2730 struct scsi_cmnd *cmd) 2731 { 2732 #ifdef ATA_DEBUG 2733 struct scsi_device *scsidev = cmd->device; 2734 u8 *scsicmd = cmd->cmnd; 2735 2736 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 2737 ap->id, 2738 scsidev->channel, scsidev->id, scsidev->lun, 2739 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], 2740 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], 2741 scsicmd[8]); 2742 #endif 2743 } 2744 2745 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, 2746 void (*done)(struct scsi_cmnd *), 2747 struct ata_device *dev) 2748 { 2749 int rc = 0; 2750 2751 if (unlikely(!scmd->cmd_len)) { 2752 ata_dev_printk(dev, KERN_WARNING, "WARNING: zero len CDB\n"); 2753 scmd->result = DID_ERROR << 16; 2754 done(scmd); 2755 return 0; 2756 } 2757 2758 if (dev->class == ATA_DEV_ATA) { 2759 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, 2760 scmd->cmnd[0]); 2761 2762 if (xlat_func) 2763 rc = ata_scsi_translate(dev, scmd, done, xlat_func); 2764 else 2765 ata_scsi_simulate(dev, scmd, done); 2766 } else 2767 rc = ata_scsi_translate(dev, scmd, done, atapi_xlat); 2768 2769 return rc; 2770 } 2771 2772 /** 2773 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device 2774 * @cmd: SCSI command to be sent 2775 * @done: Completion function, called when command is complete 2776 * 2777 * In some cases, this function translates SCSI commands into 2778 * ATA taskfiles, and queues the taskfiles to be sent to 2779 * hardware. In other cases, this function simulates a 2780 * SCSI device by evaluating and responding to certain 2781 * SCSI commands. This creates the overall effect of 2782 * ATA and ATAPI devices appearing as SCSI devices. 2783 * 2784 * LOCKING: 2785 * Releases scsi-layer-held lock, and obtains host lock. 2786 * 2787 * RETURNS: 2788 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 2789 * 0 otherwise. 2790 */ 2791 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 2792 { 2793 struct ata_port *ap; 2794 struct ata_device *dev; 2795 struct scsi_device *scsidev = cmd->device; 2796 struct Scsi_Host *shost = scsidev->host; 2797 int rc = 0; 2798 2799 ap = ata_shost_to_port(shost); 2800 2801 spin_unlock(shost->host_lock); 2802 spin_lock(ap->lock); 2803 2804 ata_scsi_dump_cdb(ap, cmd); 2805 2806 dev = ata_scsi_find_dev(ap, scsidev); 2807 if (likely(dev)) 2808 rc = __ata_scsi_queuecmd(cmd, done, dev); 2809 else { 2810 cmd->result = (DID_BAD_TARGET << 16); 2811 done(cmd); 2812 } 2813 2814 spin_unlock(ap->lock); 2815 spin_lock(shost->host_lock); 2816 return rc; 2817 } 2818 2819 /** 2820 * ata_scsi_simulate - simulate SCSI command on ATA device 2821 * @dev: the target device 2822 * @cmd: SCSI command being sent to device. 2823 * @done: SCSI command completion function. 2824 * 2825 * Interprets and directly executes a select list of SCSI commands 2826 * that can be handled internally. 2827 * 2828 * LOCKING: 2829 * spin_lock_irqsave(host lock) 2830 */ 2831 2832 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 2833 void (*done)(struct scsi_cmnd *)) 2834 { 2835 struct ata_scsi_args args; 2836 const u8 *scsicmd = cmd->cmnd; 2837 2838 args.dev = dev; 2839 args.id = dev->id; 2840 args.cmd = cmd; 2841 args.done = done; 2842 2843 switch(scsicmd[0]) { 2844 /* no-op's, complete with success */ 2845 case SYNCHRONIZE_CACHE: 2846 case REZERO_UNIT: 2847 case SEEK_6: 2848 case SEEK_10: 2849 case TEST_UNIT_READY: 2850 case FORMAT_UNIT: /* FIXME: correct? */ 2851 case SEND_DIAGNOSTIC: /* FIXME: correct? */ 2852 ata_scsi_rbuf_fill(&args, ata_scsiop_noop); 2853 break; 2854 2855 case INQUIRY: 2856 if (scsicmd[1] & 2) /* is CmdDt set? */ 2857 ata_scsi_invalid_field(cmd, done); 2858 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ 2859 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); 2860 else if (scsicmd[2] == 0x00) 2861 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); 2862 else if (scsicmd[2] == 0x80) 2863 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); 2864 else if (scsicmd[2] == 0x83) 2865 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); 2866 else 2867 ata_scsi_invalid_field(cmd, done); 2868 break; 2869 2870 case MODE_SENSE: 2871 case MODE_SENSE_10: 2872 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); 2873 break; 2874 2875 case MODE_SELECT: /* unconditionally return */ 2876 case MODE_SELECT_10: /* bad-field-in-cdb */ 2877 ata_scsi_invalid_field(cmd, done); 2878 break; 2879 2880 case READ_CAPACITY: 2881 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 2882 break; 2883 2884 case SERVICE_ACTION_IN: 2885 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) 2886 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); 2887 else 2888 ata_scsi_invalid_field(cmd, done); 2889 break; 2890 2891 case REPORT_LUNS: 2892 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); 2893 break; 2894 2895 /* mandatory commands we haven't implemented yet */ 2896 case REQUEST_SENSE: 2897 2898 /* all other commands */ 2899 default: 2900 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); 2901 /* "Invalid command operation code" */ 2902 done(cmd); 2903 break; 2904 } 2905 } 2906 2907 void ata_scsi_scan_host(struct ata_port *ap) 2908 { 2909 unsigned int i; 2910 2911 if (ap->flags & ATA_FLAG_DISABLED) 2912 return; 2913 2914 for (i = 0; i < ATA_MAX_DEVICES; i++) { 2915 struct ata_device *dev = &ap->device[i]; 2916 struct scsi_device *sdev; 2917 2918 if (!ata_dev_enabled(dev) || dev->sdev) 2919 continue; 2920 2921 sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL); 2922 if (!IS_ERR(sdev)) { 2923 dev->sdev = sdev; 2924 scsi_device_put(sdev); 2925 } 2926 } 2927 } 2928 2929 /** 2930 * ata_scsi_offline_dev - offline attached SCSI device 2931 * @dev: ATA device to offline attached SCSI device for 2932 * 2933 * This function is called from ata_eh_hotplug() and responsible 2934 * for taking the SCSI device attached to @dev offline. This 2935 * function is called with host lock which protects dev->sdev 2936 * against clearing. 2937 * 2938 * LOCKING: 2939 * spin_lock_irqsave(host lock) 2940 * 2941 * RETURNS: 2942 * 1 if attached SCSI device exists, 0 otherwise. 2943 */ 2944 int ata_scsi_offline_dev(struct ata_device *dev) 2945 { 2946 if (dev->sdev) { 2947 scsi_device_set_state(dev->sdev, SDEV_OFFLINE); 2948 return 1; 2949 } 2950 return 0; 2951 } 2952 2953 /** 2954 * ata_scsi_remove_dev - remove attached SCSI device 2955 * @dev: ATA device to remove attached SCSI device for 2956 * 2957 * This function is called from ata_eh_scsi_hotplug() and 2958 * responsible for removing the SCSI device attached to @dev. 2959 * 2960 * LOCKING: 2961 * Kernel thread context (may sleep). 2962 */ 2963 static void ata_scsi_remove_dev(struct ata_device *dev) 2964 { 2965 struct ata_port *ap = dev->ap; 2966 struct scsi_device *sdev; 2967 unsigned long flags; 2968 2969 /* Alas, we need to grab scan_mutex to ensure SCSI device 2970 * state doesn't change underneath us and thus 2971 * scsi_device_get() always succeeds. The mutex locking can 2972 * be removed if there is __scsi_device_get() interface which 2973 * increments reference counts regardless of device state. 2974 */ 2975 mutex_lock(&ap->scsi_host->scan_mutex); 2976 spin_lock_irqsave(ap->lock, flags); 2977 2978 /* clearing dev->sdev is protected by host lock */ 2979 sdev = dev->sdev; 2980 dev->sdev = NULL; 2981 2982 if (sdev) { 2983 /* If user initiated unplug races with us, sdev can go 2984 * away underneath us after the host lock and 2985 * scan_mutex are released. Hold onto it. 2986 */ 2987 if (scsi_device_get(sdev) == 0) { 2988 /* The following ensures the attached sdev is 2989 * offline on return from ata_scsi_offline_dev() 2990 * regardless it wins or loses the race 2991 * against this function. 2992 */ 2993 scsi_device_set_state(sdev, SDEV_OFFLINE); 2994 } else { 2995 WARN_ON(1); 2996 sdev = NULL; 2997 } 2998 } 2999 3000 spin_unlock_irqrestore(ap->lock, flags); 3001 mutex_unlock(&ap->scsi_host->scan_mutex); 3002 3003 if (sdev) { 3004 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", 3005 sdev->sdev_gendev.bus_id); 3006 3007 scsi_remove_device(sdev); 3008 scsi_device_put(sdev); 3009 } 3010 } 3011 3012 /** 3013 * ata_scsi_hotplug - SCSI part of hotplug 3014 * @work: Pointer to ATA port to perform SCSI hotplug on 3015 * 3016 * Perform SCSI part of hotplug. It's executed from a separate 3017 * workqueue after EH completes. This is necessary because SCSI 3018 * hot plugging requires working EH and hot unplugging is 3019 * synchronized with hot plugging with a mutex. 3020 * 3021 * LOCKING: 3022 * Kernel thread context (may sleep). 3023 */ 3024 void ata_scsi_hotplug(struct work_struct *work) 3025 { 3026 struct ata_port *ap = 3027 container_of(work, struct ata_port, hotplug_task.work); 3028 int i; 3029 3030 if (ap->pflags & ATA_PFLAG_UNLOADING) { 3031 DPRINTK("ENTER/EXIT - unloading\n"); 3032 return; 3033 } 3034 3035 DPRINTK("ENTER\n"); 3036 3037 /* unplug detached devices */ 3038 for (i = 0; i < ATA_MAX_DEVICES; i++) { 3039 struct ata_device *dev = &ap->device[i]; 3040 unsigned long flags; 3041 3042 if (!(dev->flags & ATA_DFLAG_DETACHED)) 3043 continue; 3044 3045 spin_lock_irqsave(ap->lock, flags); 3046 dev->flags &= ~ATA_DFLAG_DETACHED; 3047 spin_unlock_irqrestore(ap->lock, flags); 3048 3049 ata_scsi_remove_dev(dev); 3050 } 3051 3052 /* scan for new ones */ 3053 ata_scsi_scan_host(ap); 3054 3055 /* If we scanned while EH was in progress, scan would have 3056 * failed silently. Requeue if there are enabled but 3057 * unattached devices. 3058 */ 3059 for (i = 0; i < ATA_MAX_DEVICES; i++) { 3060 struct ata_device *dev = &ap->device[i]; 3061 if (ata_dev_enabled(dev) && !dev->sdev) { 3062 queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ); 3063 break; 3064 } 3065 } 3066 3067 DPRINTK("EXIT\n"); 3068 } 3069 3070 /** 3071 * ata_scsi_user_scan - indication for user-initiated bus scan 3072 * @shost: SCSI host to scan 3073 * @channel: Channel to scan 3074 * @id: ID to scan 3075 * @lun: LUN to scan 3076 * 3077 * This function is called when user explicitly requests bus 3078 * scan. Set probe pending flag and invoke EH. 3079 * 3080 * LOCKING: 3081 * SCSI layer (we don't care) 3082 * 3083 * RETURNS: 3084 * Zero. 3085 */ 3086 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, 3087 unsigned int id, unsigned int lun) 3088 { 3089 struct ata_port *ap = ata_shost_to_port(shost); 3090 unsigned long flags; 3091 int rc = 0; 3092 3093 if (!ap->ops->error_handler) 3094 return -EOPNOTSUPP; 3095 3096 if ((channel != SCAN_WILD_CARD && channel != 0) || 3097 (lun != SCAN_WILD_CARD && lun != 0)) 3098 return -EINVAL; 3099 3100 spin_lock_irqsave(ap->lock, flags); 3101 3102 if (id == SCAN_WILD_CARD) { 3103 ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 3104 ap->eh_info.action |= ATA_EH_SOFTRESET; 3105 } else { 3106 struct ata_device *dev = ata_find_dev(ap, id); 3107 3108 if (dev) { 3109 ap->eh_info.probe_mask |= 1 << dev->devno; 3110 ap->eh_info.action |= ATA_EH_SOFTRESET; 3111 ap->eh_info.flags |= ATA_EHI_RESUME_LINK; 3112 } else 3113 rc = -EINVAL; 3114 } 3115 3116 if (rc == 0) { 3117 ata_port_schedule_eh(ap); 3118 spin_unlock_irqrestore(ap->lock, flags); 3119 ata_port_wait_eh(ap); 3120 } else 3121 spin_unlock_irqrestore(ap->lock, flags); 3122 3123 return rc; 3124 } 3125 3126 /** 3127 * ata_scsi_dev_rescan - initiate scsi_rescan_device() 3128 * @work: Pointer to ATA port to perform scsi_rescan_device() 3129 * 3130 * After ATA pass thru (SAT) commands are executed successfully, 3131 * libata need to propagate the changes to SCSI layer. This 3132 * function must be executed from ata_aux_wq such that sdev 3133 * attach/detach don't race with rescan. 3134 * 3135 * LOCKING: 3136 * Kernel thread context (may sleep). 3137 */ 3138 void ata_scsi_dev_rescan(struct work_struct *work) 3139 { 3140 struct ata_port *ap = 3141 container_of(work, struct ata_port, scsi_rescan_task); 3142 unsigned long flags; 3143 unsigned int i; 3144 3145 spin_lock_irqsave(ap->lock, flags); 3146 3147 for (i = 0; i < ATA_MAX_DEVICES; i++) { 3148 struct ata_device *dev = &ap->device[i]; 3149 struct scsi_device *sdev = dev->sdev; 3150 3151 if (!ata_dev_enabled(dev) || !sdev) 3152 continue; 3153 if (scsi_device_get(sdev)) 3154 continue; 3155 3156 spin_unlock_irqrestore(ap->lock, flags); 3157 scsi_rescan_device(&(sdev->sdev_gendev)); 3158 scsi_device_put(sdev); 3159 spin_lock_irqsave(ap->lock, flags); 3160 } 3161 3162 spin_unlock_irqrestore(ap->lock, flags); 3163 } 3164 3165 /** 3166 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device 3167 * @host: ATA host container for all SAS ports 3168 * @port_info: Information from low-level host driver 3169 * @shost: SCSI host that the scsi device is attached to 3170 * 3171 * LOCKING: 3172 * PCI/etc. bus probe sem. 3173 * 3174 * RETURNS: 3175 * ata_port pointer on success / NULL on failure. 3176 */ 3177 3178 struct ata_port *ata_sas_port_alloc(struct ata_host *host, 3179 struct ata_port_info *port_info, 3180 struct Scsi_Host *shost) 3181 { 3182 struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL); 3183 struct ata_probe_ent *ent; 3184 3185 if (!ap) 3186 return NULL; 3187 3188 ent = ata_probe_ent_alloc(host->dev, port_info); 3189 if (!ent) { 3190 kfree(ap); 3191 return NULL; 3192 } 3193 3194 ata_port_init(ap, host, ent, 0); 3195 ap->lock = shost->host_lock; 3196 kfree(ent); 3197 return ap; 3198 } 3199 EXPORT_SYMBOL_GPL(ata_sas_port_alloc); 3200 3201 /** 3202 * ata_sas_port_start - Set port up for dma. 3203 * @ap: Port to initialize 3204 * 3205 * Called just after data structures for each port are 3206 * initialized. Allocates DMA pad. 3207 * 3208 * May be used as the port_start() entry in ata_port_operations. 3209 * 3210 * LOCKING: 3211 * Inherited from caller. 3212 */ 3213 int ata_sas_port_start(struct ata_port *ap) 3214 { 3215 return ata_pad_alloc(ap, ap->dev); 3216 } 3217 EXPORT_SYMBOL_GPL(ata_sas_port_start); 3218 3219 /** 3220 * ata_port_stop - Undo ata_sas_port_start() 3221 * @ap: Port to shut down 3222 * 3223 * Frees the DMA pad. 3224 * 3225 * May be used as the port_stop() entry in ata_port_operations. 3226 * 3227 * LOCKING: 3228 * Inherited from caller. 3229 */ 3230 3231 void ata_sas_port_stop(struct ata_port *ap) 3232 { 3233 ata_pad_free(ap, ap->dev); 3234 } 3235 EXPORT_SYMBOL_GPL(ata_sas_port_stop); 3236 3237 /** 3238 * ata_sas_port_init - Initialize a SATA device 3239 * @ap: SATA port to initialize 3240 * 3241 * LOCKING: 3242 * PCI/etc. bus probe sem. 3243 * 3244 * RETURNS: 3245 * Zero on success, non-zero on error. 3246 */ 3247 3248 int ata_sas_port_init(struct ata_port *ap) 3249 { 3250 int rc = ap->ops->port_start(ap); 3251 3252 if (!rc) 3253 rc = ata_bus_probe(ap); 3254 3255 return rc; 3256 } 3257 EXPORT_SYMBOL_GPL(ata_sas_port_init); 3258 3259 /** 3260 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc 3261 * @ap: SATA port to destroy 3262 * 3263 */ 3264 3265 void ata_sas_port_destroy(struct ata_port *ap) 3266 { 3267 ap->ops->port_stop(ap); 3268 kfree(ap); 3269 } 3270 EXPORT_SYMBOL_GPL(ata_sas_port_destroy); 3271 3272 /** 3273 * ata_sas_slave_configure - Default slave_config routine for libata devices 3274 * @sdev: SCSI device to configure 3275 * @ap: ATA port to which SCSI device is attached 3276 * 3277 * RETURNS: 3278 * Zero. 3279 */ 3280 3281 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) 3282 { 3283 ata_scsi_sdev_config(sdev); 3284 ata_scsi_dev_config(sdev, ap->device); 3285 return 0; 3286 } 3287 EXPORT_SYMBOL_GPL(ata_sas_slave_configure); 3288 3289 /** 3290 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device 3291 * @cmd: SCSI command to be sent 3292 * @done: Completion function, called when command is complete 3293 * @ap: ATA port to which the command is being sent 3294 * 3295 * RETURNS: 3296 * Return value from __ata_scsi_queuecmd() if @cmd can be queued, 3297 * 0 otherwise. 3298 */ 3299 3300 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 3301 struct ata_port *ap) 3302 { 3303 int rc = 0; 3304 3305 ata_scsi_dump_cdb(ap, cmd); 3306 3307 if (likely(ata_scsi_dev_enabled(ap->device))) 3308 rc = __ata_scsi_queuecmd(cmd, done, ap->device); 3309 else { 3310 cmd->result = (DID_BAD_TARGET << 16); 3311 done(cmd); 3312 } 3313 return rc; 3314 } 3315 EXPORT_SYMBOL_GPL(ata_sas_queuecmd); 3316