ide-taskfile.c revision 9a3c49be5c5f7388eefb712be9a383904140532e
1/* 2 * linux/drivers/ide/ide-taskfile.c Version 0.38 March 05, 2003 3 * 4 * Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org> 5 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> 6 * Copyright (C) 2001-2002 Klaus Smolin 7 * IBM Storage Technology Division 8 * Copyright (C) 2003-2004 Bartlomiej Zolnierkiewicz 9 * 10 * The big the bad and the ugly. 11 */ 12 13#include <linux/module.h> 14#include <linux/types.h> 15#include <linux/string.h> 16#include <linux/kernel.h> 17#include <linux/timer.h> 18#include <linux/mm.h> 19#include <linux/sched.h> 20#include <linux/interrupt.h> 21#include <linux/major.h> 22#include <linux/errno.h> 23#include <linux/genhd.h> 24#include <linux/blkpg.h> 25#include <linux/slab.h> 26#include <linux/pci.h> 27#include <linux/delay.h> 28#include <linux/hdreg.h> 29#include <linux/ide.h> 30#include <linux/bitops.h> 31#include <linux/scatterlist.h> 32 33#include <asm/byteorder.h> 34#include <asm/irq.h> 35#include <asm/uaccess.h> 36#include <asm/io.h> 37 38static void ata_bswap_data (void *buffer, int wcount) 39{ 40 u16 *p = buffer; 41 42 while (wcount--) { 43 *p = *p << 8 | *p >> 8; p++; 44 *p = *p << 8 | *p >> 8; p++; 45 } 46} 47 48static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount) 49{ 50 HWIF(drive)->ata_input_data(drive, buffer, wcount); 51 if (drive->bswap) 52 ata_bswap_data(buffer, wcount); 53} 54 55static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount) 56{ 57 if (drive->bswap) { 58 ata_bswap_data(buffer, wcount); 59 HWIF(drive)->ata_output_data(drive, buffer, wcount); 60 ata_bswap_data(buffer, wcount); 61 } else { 62 HWIF(drive)->ata_output_data(drive, buffer, wcount); 63 } 64} 65 66void ide_tf_load(ide_drive_t *drive, ide_task_t *task) 67{ 68 ide_hwif_t *hwif = drive->hwif; 69 struct ide_taskfile *tf = &task->tf; 70 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF; 71 72 if (IDE_CONTROL_REG) 73 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); /* clear nIEN */ 74 75 if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0) 76 SELECT_MASK(drive, 0); 77 78 if (task->tf_flags & IDE_TFLAG_LBA48) { 79 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG); 80 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG); 81 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG); 82 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG); 83 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG); 84 } 85 86 hwif->OUTB(tf->feature, IDE_FEATURE_REG); 87 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG); 88 hwif->OUTB(tf->lbal, IDE_SECTOR_REG); 89 hwif->OUTB(tf->lbam, IDE_LCYL_REG); 90 hwif->OUTB(tf->lbah, IDE_HCYL_REG); 91 92 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG); 93} 94 95EXPORT_SYMBOL_GPL(ide_tf_load); 96 97int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf) 98{ 99 ide_task_t args; 100 101 memset(&args, 0, sizeof(ide_task_t)); 102 args.tf.nsect = 0x01; 103 if (drive->media == ide_disk) 104 args.tf.command = WIN_IDENTIFY; 105 else 106 args.tf.command = WIN_PIDENTIFY; 107 args.command_type = IDE_DRIVE_TASK_IN; 108 args.data_phase = TASKFILE_IN; 109 args.handler = &task_in_intr; 110 return ide_raw_taskfile(drive, &args, buf); 111} 112 113ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task) 114{ 115 ide_hwif_t *hwif = HWIF(drive); 116 struct ide_taskfile *tf = &task->tf; 117 118 if (drive->addressing == 1) 119 task->tf_flags |= IDE_TFLAG_LBA48; 120 121 ide_tf_load(drive, task); 122 123 if (task->handler != NULL) { 124 if (task->prehandler != NULL) { 125 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG); 126 ndelay(400); /* FIXME */ 127 return task->prehandler(drive, task->rq); 128 } 129 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL); 130 return ide_started; 131 } 132 133 if (!drive->using_dma) 134 return ide_stopped; 135 136 switch (tf->command) { 137 case WIN_WRITEDMA_ONCE: 138 case WIN_WRITEDMA: 139 case WIN_WRITEDMA_EXT: 140 case WIN_READDMA_ONCE: 141 case WIN_READDMA: 142 case WIN_READDMA_EXT: 143 case WIN_IDENTIFY_DMA: 144 if (!hwif->dma_setup(drive)) { 145 hwif->dma_exec_cmd(drive, tf->command); 146 hwif->dma_start(drive); 147 return ide_started; 148 } 149 break; 150 default: 151 if (task->handler == NULL) 152 return ide_stopped; 153 } 154 155 return ide_stopped; 156} 157 158/* 159 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd. 160 */ 161ide_startstop_t set_multmode_intr (ide_drive_t *drive) 162{ 163 ide_hwif_t *hwif = HWIF(drive); 164 u8 stat; 165 166 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { 167 drive->mult_count = drive->mult_req; 168 } else { 169 drive->mult_req = drive->mult_count = 0; 170 drive->special.b.recalibrate = 1; 171 (void) ide_dump_status(drive, "set_multmode", stat); 172 } 173 return ide_stopped; 174} 175 176/* 177 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd. 178 */ 179ide_startstop_t set_geometry_intr (ide_drive_t *drive) 180{ 181 ide_hwif_t *hwif = HWIF(drive); 182 int retries = 5; 183 u8 stat; 184 185 while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) 186 udelay(10); 187 188 if (OK_STAT(stat, READY_STAT, BAD_STAT)) 189 return ide_stopped; 190 191 if (stat & (ERR_STAT|DRQ_STAT)) 192 return ide_error(drive, "set_geometry_intr", stat); 193 194 BUG_ON(HWGROUP(drive)->handler != NULL); 195 ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL); 196 return ide_started; 197} 198 199/* 200 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd. 201 */ 202ide_startstop_t recal_intr (ide_drive_t *drive) 203{ 204 ide_hwif_t *hwif = HWIF(drive); 205 u8 stat; 206 207 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT)) 208 return ide_error(drive, "recal_intr", stat); 209 return ide_stopped; 210} 211 212/* 213 * Handler for commands without a data phase 214 */ 215ide_startstop_t task_no_data_intr (ide_drive_t *drive) 216{ 217 ide_task_t *args = HWGROUP(drive)->rq->special; 218 ide_hwif_t *hwif = HWIF(drive); 219 u8 stat; 220 221 local_irq_enable_in_hardirq(); 222 if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { 223 return ide_error(drive, "task_no_data_intr", stat); 224 /* calls ide_end_drive_cmd */ 225 } 226 if (args) 227 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG)); 228 229 return ide_stopped; 230} 231 232static u8 wait_drive_not_busy(ide_drive_t *drive) 233{ 234 ide_hwif_t *hwif = HWIF(drive); 235 int retries; 236 u8 stat; 237 238 /* 239 * Last sector was transfered, wait until drive is ready. 240 * This can take up to 10 usec, but we will wait max 1 ms 241 * (drive_cmd_intr() waits that long). 242 */ 243 for (retries = 0; retries < 100; retries++) { 244 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) 245 udelay(10); 246 else 247 break; 248 } 249 250 if (stat & BUSY_STAT) 251 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name); 252 253 return stat; 254} 255 256static void ide_pio_sector(ide_drive_t *drive, unsigned int write) 257{ 258 ide_hwif_t *hwif = drive->hwif; 259 struct scatterlist *sg = hwif->sg_table; 260 struct scatterlist *cursg = hwif->cursg; 261 struct page *page; 262#ifdef CONFIG_HIGHMEM 263 unsigned long flags; 264#endif 265 unsigned int offset; 266 u8 *buf; 267 268 cursg = hwif->cursg; 269 if (!cursg) { 270 cursg = sg; 271 hwif->cursg = sg; 272 } 273 274 page = sg_page(cursg); 275 offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE; 276 277 /* get the current page and offset */ 278 page = nth_page(page, (offset >> PAGE_SHIFT)); 279 offset %= PAGE_SIZE; 280 281#ifdef CONFIG_HIGHMEM 282 local_irq_save(flags); 283#endif 284 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset; 285 286 hwif->nleft--; 287 hwif->cursg_ofs++; 288 289 if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) { 290 hwif->cursg = sg_next(hwif->cursg); 291 hwif->cursg_ofs = 0; 292 } 293 294 /* do the actual data transfer */ 295 if (write) 296 taskfile_output_data(drive, buf, SECTOR_WORDS); 297 else 298 taskfile_input_data(drive, buf, SECTOR_WORDS); 299 300 kunmap_atomic(buf, KM_BIO_SRC_IRQ); 301#ifdef CONFIG_HIGHMEM 302 local_irq_restore(flags); 303#endif 304} 305 306static void ide_pio_multi(ide_drive_t *drive, unsigned int write) 307{ 308 unsigned int nsect; 309 310 nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count); 311 while (nsect--) 312 ide_pio_sector(drive, write); 313} 314 315static void ide_pio_datablock(ide_drive_t *drive, struct request *rq, 316 unsigned int write) 317{ 318 if (rq->bio) /* fs request */ 319 rq->errors = 0; 320 321 touch_softlockup_watchdog(); 322 323 switch (drive->hwif->data_phase) { 324 case TASKFILE_MULTI_IN: 325 case TASKFILE_MULTI_OUT: 326 ide_pio_multi(drive, write); 327 break; 328 default: 329 ide_pio_sector(drive, write); 330 break; 331 } 332} 333 334static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq, 335 const char *s, u8 stat) 336{ 337 if (rq->bio) { 338 ide_hwif_t *hwif = drive->hwif; 339 int sectors = hwif->nsect - hwif->nleft; 340 341 switch (hwif->data_phase) { 342 case TASKFILE_IN: 343 if (hwif->nleft) 344 break; 345 /* fall through */ 346 case TASKFILE_OUT: 347 sectors--; 348 break; 349 case TASKFILE_MULTI_IN: 350 if (hwif->nleft) 351 break; 352 /* fall through */ 353 case TASKFILE_MULTI_OUT: 354 sectors -= drive->mult_count; 355 default: 356 break; 357 } 358 359 if (sectors > 0) { 360 ide_driver_t *drv; 361 362 drv = *(ide_driver_t **)rq->rq_disk->private_data; 363 drv->end_request(drive, 1, sectors); 364 } 365 } 366 return ide_error(drive, s, stat); 367} 368 369static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat) 370{ 371 HWIF(drive)->cursg = NULL; 372 373 if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) { 374 ide_task_t *task = rq->special; 375 376 if (task->tf_out_flags.all) { 377 u8 err = drive->hwif->INB(IDE_ERROR_REG); 378 ide_end_drive_cmd(drive, stat, err); 379 return; 380 } 381 } 382 383 if (rq->rq_disk) { 384 ide_driver_t *drv; 385 386 drv = *(ide_driver_t **)rq->rq_disk->private_data;; 387 drv->end_request(drive, 1, rq->hard_nr_sectors); 388 } else 389 ide_end_request(drive, 1, rq->hard_nr_sectors); 390} 391 392/* 393 * Handler for command with PIO data-in phase (Read/Read Multiple). 394 */ 395ide_startstop_t task_in_intr (ide_drive_t *drive) 396{ 397 ide_hwif_t *hwif = drive->hwif; 398 struct request *rq = HWGROUP(drive)->rq; 399 u8 stat = hwif->INB(IDE_STATUS_REG); 400 401 /* new way for dealing with premature shared PCI interrupts */ 402 if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) { 403 if (stat & (ERR_STAT | DRQ_STAT)) 404 return task_error(drive, rq, __FUNCTION__, stat); 405 /* No data yet, so wait for another IRQ. */ 406 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); 407 return ide_started; 408 } 409 410 ide_pio_datablock(drive, rq, 0); 411 412 /* If it was the last datablock check status and finish transfer. */ 413 if (!hwif->nleft) { 414 stat = wait_drive_not_busy(drive); 415 if (!OK_STAT(stat, 0, BAD_R_STAT)) 416 return task_error(drive, rq, __FUNCTION__, stat); 417 task_end_request(drive, rq, stat); 418 return ide_stopped; 419 } 420 421 /* Still data left to transfer. */ 422 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); 423 424 return ide_started; 425} 426EXPORT_SYMBOL(task_in_intr); 427 428/* 429 * Handler for command with PIO data-out phase (Write/Write Multiple). 430 */ 431static ide_startstop_t task_out_intr (ide_drive_t *drive) 432{ 433 ide_hwif_t *hwif = drive->hwif; 434 struct request *rq = HWGROUP(drive)->rq; 435 u8 stat = hwif->INB(IDE_STATUS_REG); 436 437 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) 438 return task_error(drive, rq, __FUNCTION__, stat); 439 440 /* Deal with unexpected ATA data phase. */ 441 if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft) 442 return task_error(drive, rq, __FUNCTION__, stat); 443 444 if (!hwif->nleft) { 445 task_end_request(drive, rq, stat); 446 return ide_stopped; 447 } 448 449 /* Still data left to transfer. */ 450 ide_pio_datablock(drive, rq, 1); 451 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); 452 453 return ide_started; 454} 455 456ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq) 457{ 458 ide_startstop_t startstop; 459 460 if (ide_wait_stat(&startstop, drive, DATA_READY, 461 drive->bad_wstat, WAIT_DRQ)) { 462 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n", 463 drive->name, 464 drive->hwif->data_phase ? "MULT" : "", 465 drive->addressing ? "_EXT" : ""); 466 return startstop; 467 } 468 469 if (!drive->unmask) 470 local_irq_disable(); 471 472 ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); 473 ide_pio_datablock(drive, rq, 1); 474 475 return ide_started; 476} 477EXPORT_SYMBOL(pre_task_out_intr); 478 479static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf) 480{ 481 struct request rq; 482 483 memset(&rq, 0, sizeof(rq)); 484 rq.ref_count = 1; 485 rq.cmd_type = REQ_TYPE_ATA_TASKFILE; 486 rq.buffer = buf; 487 488 /* 489 * (ks) We transfer currently only whole sectors. 490 * This is suffient for now. But, it would be great, 491 * if we would find a solution to transfer any size. 492 * To support special commands like READ LONG. 493 */ 494 if (args->command_type != IDE_DRIVE_TASK_NO_DATA) { 495 if (data_size == 0) 496 rq.nr_sectors = (args->tf.hob_nsect << 8) | args->tf.nsect; 497 else 498 rq.nr_sectors = data_size / SECTOR_SIZE; 499 500 if (!rq.nr_sectors) { 501 printk(KERN_ERR "%s: in/out command without data\n", 502 drive->name); 503 return -EFAULT; 504 } 505 506 rq.hard_nr_sectors = rq.nr_sectors; 507 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors; 508 509 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE) 510 rq.cmd_flags |= REQ_RW; 511 } 512 513 rq.special = args; 514 args->rq = &rq; 515 return ide_do_drive_cmd(drive, &rq, ide_wait); 516} 517 518int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf) 519{ 520 return ide_diag_taskfile(drive, args, 0, buf); 521} 522 523EXPORT_SYMBOL(ide_raw_taskfile); 524 525int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task) 526{ 527 task->command_type = IDE_DRIVE_TASK_NO_DATA; 528 task->data_phase = TASKFILE_NO_DATA; 529 task->handler = task_no_data_intr; 530 531 return ide_raw_taskfile(drive, task, NULL); 532} 533EXPORT_SYMBOL_GPL(ide_no_data_taskfile); 534 535#ifdef CONFIG_IDE_TASK_IOCTL 536int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) 537{ 538 ide_task_request_t *req_task; 539 ide_task_t args; 540 u8 *outbuf = NULL; 541 u8 *inbuf = NULL; 542 int err = 0; 543 int tasksize = sizeof(struct ide_task_request_s); 544 unsigned int taskin = 0; 545 unsigned int taskout = 0; 546 u8 io_32bit = drive->io_32bit; 547 char __user *buf = (char __user *)arg; 548 549// printk("IDE Taskfile ...\n"); 550 551 req_task = kzalloc(tasksize, GFP_KERNEL); 552 if (req_task == NULL) return -ENOMEM; 553 if (copy_from_user(req_task, buf, tasksize)) { 554 kfree(req_task); 555 return -EFAULT; 556 } 557 558 taskout = req_task->out_size; 559 taskin = req_task->in_size; 560 561 if (taskin > 65536 || taskout > 65536) { 562 err = -EINVAL; 563 goto abort; 564 } 565 566 if (taskout) { 567 int outtotal = tasksize; 568 outbuf = kzalloc(taskout, GFP_KERNEL); 569 if (outbuf == NULL) { 570 err = -ENOMEM; 571 goto abort; 572 } 573 if (copy_from_user(outbuf, buf + outtotal, taskout)) { 574 err = -EFAULT; 575 goto abort; 576 } 577 } 578 579 if (taskin) { 580 int intotal = tasksize + taskout; 581 inbuf = kzalloc(taskin, GFP_KERNEL); 582 if (inbuf == NULL) { 583 err = -ENOMEM; 584 goto abort; 585 } 586 if (copy_from_user(inbuf, buf + intotal, taskin)) { 587 err = -EFAULT; 588 goto abort; 589 } 590 } 591 592 memset(&args, 0, sizeof(ide_task_t)); 593 594 memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2); 595 memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE); 596 args.tf_in_flags = req_task->in_flags; 597 args.tf_out_flags = req_task->out_flags; 598 args.data_phase = req_task->data_phase; 599 args.command_type = req_task->req_cmd; 600 601 drive->io_32bit = 0; 602 switch(req_task->data_phase) { 603 case TASKFILE_OUT_DMAQ: 604 case TASKFILE_OUT_DMA: 605 err = ide_diag_taskfile(drive, &args, taskout, outbuf); 606 break; 607 case TASKFILE_IN_DMAQ: 608 case TASKFILE_IN_DMA: 609 err = ide_diag_taskfile(drive, &args, taskin, inbuf); 610 break; 611 case TASKFILE_MULTI_OUT: 612 if (!drive->mult_count) { 613 /* (hs): give up if multcount is not set */ 614 printk(KERN_ERR "%s: %s Multimode Write " \ 615 "multcount is not set\n", 616 drive->name, __FUNCTION__); 617 err = -EPERM; 618 goto abort; 619 } 620 /* fall through */ 621 case TASKFILE_OUT: 622 args.prehandler = &pre_task_out_intr; 623 args.handler = &task_out_intr; 624 err = ide_diag_taskfile(drive, &args, taskout, outbuf); 625 break; 626 case TASKFILE_MULTI_IN: 627 if (!drive->mult_count) { 628 /* (hs): give up if multcount is not set */ 629 printk(KERN_ERR "%s: %s Multimode Read failure " \ 630 "multcount is not set\n", 631 drive->name, __FUNCTION__); 632 err = -EPERM; 633 goto abort; 634 } 635 /* fall through */ 636 case TASKFILE_IN: 637 args.handler = &task_in_intr; 638 err = ide_diag_taskfile(drive, &args, taskin, inbuf); 639 break; 640 case TASKFILE_NO_DATA: 641 args.handler = &task_no_data_intr; 642 err = ide_diag_taskfile(drive, &args, 0, NULL); 643 break; 644 default: 645 err = -EFAULT; 646 goto abort; 647 } 648 649 memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2); 650 memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE); 651 req_task->in_flags = args.tf_in_flags; 652 req_task->out_flags = args.tf_out_flags; 653 654 if (copy_to_user(buf, req_task, tasksize)) { 655 err = -EFAULT; 656 goto abort; 657 } 658 if (taskout) { 659 int outtotal = tasksize; 660 if (copy_to_user(buf + outtotal, outbuf, taskout)) { 661 err = -EFAULT; 662 goto abort; 663 } 664 } 665 if (taskin) { 666 int intotal = tasksize + taskout; 667 if (copy_to_user(buf + intotal, inbuf, taskin)) { 668 err = -EFAULT; 669 goto abort; 670 } 671 } 672abort: 673 kfree(req_task); 674 kfree(outbuf); 675 kfree(inbuf); 676 677// printk("IDE Taskfile ioctl ended. rc = %i\n", err); 678 679 drive->io_32bit = io_32bit; 680 681 return err; 682} 683#endif 684 685int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf) 686{ 687 struct request rq; 688 u8 buffer[4]; 689 690 if (!buf) 691 buf = buffer; 692 memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors); 693 ide_init_drive_cmd(&rq); 694 rq.buffer = buf; 695 *buf++ = cmd; 696 *buf++ = nsect; 697 *buf++ = feature; 698 *buf++ = sectors; 699 return ide_do_drive_cmd(drive, &rq, ide_wait); 700} 701 702int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) 703{ 704 int err = 0; 705 u8 args[4], *argbuf = args; 706 u8 xfer_rate = 0; 707 int argsize = 4; 708 ide_task_t tfargs; 709 struct ide_taskfile *tf = &tfargs.tf; 710 711 if (NULL == (void *) arg) { 712 struct request rq; 713 ide_init_drive_cmd(&rq); 714 return ide_do_drive_cmd(drive, &rq, ide_wait); 715 } 716 717 if (copy_from_user(args, (void __user *)arg, 4)) 718 return -EFAULT; 719 720 memset(&tfargs, 0, sizeof(ide_task_t)); 721 tf->feature = args[2]; 722 tf->nsect = args[3]; 723 tf->lbal = args[1]; 724 tf->command = args[0]; 725 726 if (args[3]) { 727 argsize = 4 + (SECTOR_WORDS * 4 * args[3]); 728 argbuf = kzalloc(argsize, GFP_KERNEL); 729 if (argbuf == NULL) 730 return -ENOMEM; 731 } 732 if (set_transfer(drive, &tfargs)) { 733 xfer_rate = args[1]; 734 if (ide_ata66_check(drive, &tfargs)) 735 goto abort; 736 } 737 738 err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf); 739 740 if (!err && xfer_rate) { 741 /* active-retuning-calls future */ 742 ide_set_xfer_rate(drive, xfer_rate); 743 ide_driveid_update(drive); 744 } 745abort: 746 if (copy_to_user((void __user *)arg, argbuf, argsize)) 747 err = -EFAULT; 748 if (argsize > 4) 749 kfree(argbuf); 750 return err; 751} 752 753static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf) 754{ 755 struct request rq; 756 757 ide_init_drive_cmd(&rq); 758 rq.cmd_type = REQ_TYPE_ATA_TASK; 759 rq.buffer = buf; 760 return ide_do_drive_cmd(drive, &rq, ide_wait); 761} 762 763int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) 764{ 765 void __user *p = (void __user *)arg; 766 int err = 0; 767 u8 args[7], *argbuf = args; 768 int argsize = 7; 769 770 if (copy_from_user(args, p, 7)) 771 return -EFAULT; 772 err = ide_wait_cmd_task(drive, argbuf); 773 if (copy_to_user(p, argbuf, argsize)) 774 err = -EFAULT; 775 return err; 776} 777 778/* 779 * NOTICE: This is additions from IBM to provide a discrete interface, 780 * for selective taskregister access operations. Nice JOB Klaus!!! 781 * Glad to be able to work and co-develop this with you and IBM. 782 */ 783ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task) 784{ 785 ide_hwif_t *hwif = HWIF(drive); 786 struct ide_taskfile *tf = &task->tf; 787 788 if (task->data_phase == TASKFILE_MULTI_IN || 789 task->data_phase == TASKFILE_MULTI_OUT) { 790 if (!drive->mult_count) { 791 printk(KERN_ERR "%s: multimode not set!\n", drive->name); 792 return ide_stopped; 793 } 794 } 795 796 /* 797 * (ks) Check taskfile in flags. 798 * If set, then execute as it is defined. 799 * If not set, then define default settings. 800 * The default values are: 801 * read all taskfile registers (except data) 802 * read the hob registers (sector, nsector, lcyl, hcyl) 803 */ 804 if (task->tf_in_flags.all == 0) { 805 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; 806 if (drive->addressing == 1) 807 task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8); 808 } 809 810 /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ 811 if (IDE_CONTROL_REG) 812 /* clear nIEN */ 813 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); 814 SELECT_MASK(drive, 0); 815 816 if (task->tf_out_flags.b.data) 817 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG); 818 819 /* (ks) send hob registers first */ 820 if (task->tf_out_flags.b.nsector_hob) 821 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG); 822 if (task->tf_out_flags.b.sector_hob) 823 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG); 824 if (task->tf_out_flags.b.lcyl_hob) 825 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG); 826 if (task->tf_out_flags.b.hcyl_hob) 827 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG); 828 829 /* (ks) Send now the standard registers */ 830 if (task->tf_out_flags.b.error_feature) 831 hwif->OUTB(tf->feature, IDE_FEATURE_REG); 832 /* refers to number of sectors to transfer */ 833 if (task->tf_out_flags.b.nsector) 834 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG); 835 /* refers to sector offset or start sector */ 836 if (task->tf_out_flags.b.sector) 837 hwif->OUTB(tf->lbal, IDE_SECTOR_REG); 838 if (task->tf_out_flags.b.lcyl) 839 hwif->OUTB(tf->lbam, IDE_LCYL_REG); 840 if (task->tf_out_flags.b.hcyl) 841 hwif->OUTB(tf->lbah, IDE_HCYL_REG); 842 843 /* 844 * (ks) In the flagged taskfile approch, we will use all specified 845 * registers and the register value will not be changed, except the 846 * select bit (master/slave) in the drive_head register. We must make 847 * sure that the desired drive is selected. 848 */ 849 hwif->OUTB(tf->device | drive->select.all, IDE_SELECT_REG); 850 switch(task->data_phase) { 851 852 case TASKFILE_OUT_DMAQ: 853 case TASKFILE_OUT_DMA: 854 case TASKFILE_IN_DMAQ: 855 case TASKFILE_IN_DMA: 856 if (!drive->using_dma) 857 break; 858 859 if (!hwif->dma_setup(drive)) { 860 hwif->dma_exec_cmd(drive, tf->command); 861 hwif->dma_start(drive); 862 return ide_started; 863 } 864 break; 865 866 default: 867 if (task->handler == NULL) 868 return ide_stopped; 869 870 /* Issue the command */ 871 if (task->prehandler) { 872 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG); 873 ndelay(400); /* FIXME */ 874 return task->prehandler(drive, task->rq); 875 } 876 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL); 877 return ide_started; 878 } 879 880 return ide_stopped; 881} 882