ide-dma.c revision 2ad1e558a2305c2b3d5099ee2f4a5929307c20ca
1/* 2 * linux/drivers/ide/ide-dma.c Version 4.10 June 9, 2000 3 * 4 * Copyright (c) 1999-2000 Andre Hedrick <andre@linux-ide.org> 5 * May be copied or modified under the terms of the GNU General Public License 6 */ 7 8/* 9 * Special Thanks to Mark for his Six years of work. 10 * 11 * Copyright (c) 1995-1998 Mark Lord 12 * May be copied or modified under the terms of the GNU General Public License 13 */ 14 15/* 16 * This module provides support for the bus-master IDE DMA functions 17 * of various PCI chipsets, including the Intel PIIX (i82371FB for 18 * the 430 FX chipset), the PIIX3 (i82371SB for the 430 HX/VX and 19 * 440 chipsets), and the PIIX4 (i82371AB for the 430 TX chipset) 20 * ("PIIX" stands for "PCI ISA IDE Xcellerator"). 21 * 22 * Pretty much the same code works for other IDE PCI bus-mastering chipsets. 23 * 24 * DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies). 25 * 26 * By default, DMA support is prepared for use, but is currently enabled only 27 * for drives which already have DMA enabled (UltraDMA or mode 2 multi/single), 28 * or which are recognized as "good" (see table below). Drives with only mode0 29 * or mode1 (multi/single) DMA should also work with this chipset/driver 30 * (eg. MC2112A) but are not enabled by default. 31 * 32 * Use "hdparm -i" to view modes supported by a given drive. 33 * 34 * The hdparm-3.5 (or later) utility can be used for manually enabling/disabling 35 * DMA support, but must be (re-)compiled against this kernel version or later. 36 * 37 * To enable DMA, use "hdparm -d1 /dev/hd?" on a per-drive basis after booting. 38 * If problems arise, ide.c will disable DMA operation after a few retries. 39 * This error recovery mechanism works and has been extremely well exercised. 40 * 41 * IDE drives, depending on their vintage, may support several different modes 42 * of DMA operation. The boot-time modes are indicated with a "*" in 43 * the "hdparm -i" listing, and can be changed with *knowledgeable* use of 44 * the "hdparm -X" feature. There is seldom a need to do this, as drives 45 * normally power-up with their "best" PIO/DMA modes enabled. 46 * 47 * Testing has been done with a rather extensive number of drives, 48 * with Quantum & Western Digital models generally outperforming the pack, 49 * and Fujitsu & Conner (and some Seagate which are really Conner) drives 50 * showing more lackluster throughput. 51 * 52 * Keep an eye on /var/adm/messages for "DMA disabled" messages. 53 * 54 * Some people have reported trouble with Intel Zappa motherboards. 55 * This can be fixed by upgrading the AMI BIOS to version 1.00.04.BS0, 56 * available from ftp://ftp.intel.com/pub/bios/10004bs0.exe 57 * (thanks to Glen Morrell <glen@spin.Stanford.edu> for researching this). 58 * 59 * Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for 60 * fixing the problem with the BIOS on some Acer motherboards. 61 * 62 * Thanks to "Benoit Poulot-Cazajous" <poulot@chorus.fr> for testing 63 * "TX" chipset compatibility and for providing patches for the "TX" chipset. 64 * 65 * Thanks to Christian Brunner <chb@muc.de> for taking a good first crack 66 * at generic DMA -- his patches were referred to when preparing this code. 67 * 68 * Most importantly, thanks to Robert Bringman <rob@mars.trion.com> 69 * for supplying a Promise UDMA board & WD UDMA drive for this work! 70 * 71 * And, yes, Intel Zappa boards really *do* use both PIIX IDE ports. 72 * 73 * ATA-66/100 and recovery functions, I forgot the rest...... 74 * 75 */ 76 77#include <linux/module.h> 78#include <linux/types.h> 79#include <linux/kernel.h> 80#include <linux/timer.h> 81#include <linux/mm.h> 82#include <linux/interrupt.h> 83#include <linux/pci.h> 84#include <linux/init.h> 85#include <linux/ide.h> 86#include <linux/delay.h> 87#include <linux/scatterlist.h> 88 89#include <asm/io.h> 90#include <asm/irq.h> 91 92static const struct drive_list_entry drive_whitelist [] = { 93 94 { "Micropolis 2112A" , "ALL" }, 95 { "CONNER CTMA 4000" , "ALL" }, 96 { "CONNER CTT8000-A" , "ALL" }, 97 { "ST34342A" , "ALL" }, 98 { NULL , NULL } 99}; 100 101static const struct drive_list_entry drive_blacklist [] = { 102 103 { "WDC AC11000H" , "ALL" }, 104 { "WDC AC22100H" , "ALL" }, 105 { "WDC AC32500H" , "ALL" }, 106 { "WDC AC33100H" , "ALL" }, 107 { "WDC AC31600H" , "ALL" }, 108 { "WDC AC32100H" , "24.09P07" }, 109 { "WDC AC23200L" , "21.10N21" }, 110 { "Compaq CRD-8241B" , "ALL" }, 111 { "CRD-8400B" , "ALL" }, 112 { "CRD-8480B", "ALL" }, 113 { "CRD-8482B", "ALL" }, 114 { "CRD-84" , "ALL" }, 115 { "SanDisk SDP3B" , "ALL" }, 116 { "SanDisk SDP3B-64" , "ALL" }, 117 { "SANYO CD-ROM CRD" , "ALL" }, 118 { "HITACHI CDR-8" , "ALL" }, 119 { "HITACHI CDR-8335" , "ALL" }, 120 { "HITACHI CDR-8435" , "ALL" }, 121 { "Toshiba CD-ROM XM-6202B" , "ALL" }, 122 { "CD-532E-A" , "ALL" }, 123 { "E-IDE CD-ROM CR-840", "ALL" }, 124 { "CD-ROM Drive/F5A", "ALL" }, 125 { "WPI CDD-820", "ALL" }, 126 { "SAMSUNG CD-ROM SC-148C", "ALL" }, 127 { "SAMSUNG CD-ROM SC", "ALL" }, 128 { "SanDisk SDP3B-64" , "ALL" }, 129 { "ATAPI CD-ROM DRIVE 40X MAXIMUM", "ALL" }, 130 { "_NEC DV5800A", "ALL" }, 131 { NULL , NULL } 132 133}; 134 135/** 136 * ide_in_drive_list - look for drive in black/white list 137 * @id: drive identifier 138 * @drive_table: list to inspect 139 * 140 * Look for a drive in the blacklist and the whitelist tables 141 * Returns 1 if the drive is found in the table. 142 */ 143 144int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table) 145{ 146 for ( ; drive_table->id_model ; drive_table++) 147 if ((!strcmp(drive_table->id_model, id->model)) && 148 ((strstr(id->fw_rev, drive_table->id_firmware)) || 149 (!strcmp(drive_table->id_firmware, "ALL")))) 150 return 1; 151 return 0; 152} 153 154/** 155 * ide_dma_intr - IDE DMA interrupt handler 156 * @drive: the drive the interrupt is for 157 * 158 * Handle an interrupt completing a read/write DMA transfer on an 159 * IDE device 160 */ 161 162ide_startstop_t ide_dma_intr (ide_drive_t *drive) 163{ 164 u8 stat = 0, dma_stat = 0; 165 166 dma_stat = HWIF(drive)->ide_dma_end(drive); 167 stat = HWIF(drive)->INB(IDE_STATUS_REG); /* get drive status */ 168 if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) { 169 if (!dma_stat) { 170 struct request *rq = HWGROUP(drive)->rq; 171 172 if (rq->rq_disk) { 173 ide_driver_t *drv; 174 175 drv = *(ide_driver_t **)rq->rq_disk->private_data; 176 drv->end_request(drive, 1, rq->nr_sectors); 177 } else 178 ide_end_request(drive, 1, rq->nr_sectors); 179 return ide_stopped; 180 } 181 printk(KERN_ERR "%s: dma_intr: bad DMA status (dma_stat=%x)\n", 182 drive->name, dma_stat); 183 } 184 return ide_error(drive, "dma_intr", stat); 185} 186 187EXPORT_SYMBOL_GPL(ide_dma_intr); 188 189#ifdef CONFIG_BLK_DEV_IDEDMA_PCI 190/** 191 * ide_build_sglist - map IDE scatter gather for DMA I/O 192 * @drive: the drive to build the DMA table for 193 * @rq: the request holding the sg list 194 * 195 * Perform the PCI mapping magic necessary to access the source or 196 * target buffers of a request via PCI DMA. The lower layers of the 197 * kernel provide the necessary cache management so that we can 198 * operate in a portable fashion 199 */ 200 201int ide_build_sglist(ide_drive_t *drive, struct request *rq) 202{ 203 ide_hwif_t *hwif = HWIF(drive); 204 struct scatterlist *sg = hwif->sg_table; 205 206 BUG_ON((rq->cmd_type == REQ_TYPE_ATA_TASKFILE) && rq->nr_sectors > 256); 207 208 ide_map_sg(drive, rq); 209 210 if (rq_data_dir(rq) == READ) 211 hwif->sg_dma_direction = PCI_DMA_FROMDEVICE; 212 else 213 hwif->sg_dma_direction = PCI_DMA_TODEVICE; 214 215 return pci_map_sg(hwif->pci_dev, sg, hwif->sg_nents, hwif->sg_dma_direction); 216} 217 218EXPORT_SYMBOL_GPL(ide_build_sglist); 219 220/** 221 * ide_build_dmatable - build IDE DMA table 222 * 223 * ide_build_dmatable() prepares a dma request. We map the command 224 * to get the pci bus addresses of the buffers and then build up 225 * the PRD table that the IDE layer wants to be fed. The code 226 * knows about the 64K wrap bug in the CS5530. 227 * 228 * Returns the number of built PRD entries if all went okay, 229 * returns 0 otherwise. 230 * 231 * May also be invoked from trm290.c 232 */ 233 234int ide_build_dmatable (ide_drive_t *drive, struct request *rq) 235{ 236 ide_hwif_t *hwif = HWIF(drive); 237 unsigned int *table = hwif->dmatable_cpu; 238 unsigned int is_trm290 = (hwif->chipset == ide_trm290) ? 1 : 0; 239 unsigned int count = 0; 240 int i; 241 struct scatterlist *sg; 242 243 hwif->sg_nents = i = ide_build_sglist(drive, rq); 244 245 if (!i) 246 return 0; 247 248 sg = hwif->sg_table; 249 while (i) { 250 u32 cur_addr; 251 u32 cur_len; 252 253 cur_addr = sg_dma_address(sg); 254 cur_len = sg_dma_len(sg); 255 256 /* 257 * Fill in the dma table, without crossing any 64kB boundaries. 258 * Most hardware requires 16-bit alignment of all blocks, 259 * but the trm290 requires 32-bit alignment. 260 */ 261 262 while (cur_len) { 263 if (count++ >= PRD_ENTRIES) { 264 printk(KERN_ERR "%s: DMA table too small\n", drive->name); 265 goto use_pio_instead; 266 } else { 267 u32 xcount, bcount = 0x10000 - (cur_addr & 0xffff); 268 269 if (bcount > cur_len) 270 bcount = cur_len; 271 *table++ = cpu_to_le32(cur_addr); 272 xcount = bcount & 0xffff; 273 if (is_trm290) 274 xcount = ((xcount >> 2) - 1) << 16; 275 if (xcount == 0x0000) { 276 /* 277 * Most chipsets correctly interpret a length of 0x0000 as 64KB, 278 * but at least one (e.g. CS5530) misinterprets it as zero (!). 279 * So here we break the 64KB entry into two 32KB entries instead. 280 */ 281 if (count++ >= PRD_ENTRIES) { 282 printk(KERN_ERR "%s: DMA table too small\n", drive->name); 283 goto use_pio_instead; 284 } 285 *table++ = cpu_to_le32(0x8000); 286 *table++ = cpu_to_le32(cur_addr + 0x8000); 287 xcount = 0x8000; 288 } 289 *table++ = cpu_to_le32(xcount); 290 cur_addr += bcount; 291 cur_len -= bcount; 292 } 293 } 294 295 sg++; 296 i--; 297 } 298 299 if (count) { 300 if (!is_trm290) 301 *--table |= cpu_to_le32(0x80000000); 302 return count; 303 } 304 printk(KERN_ERR "%s: empty DMA table?\n", drive->name); 305use_pio_instead: 306 pci_unmap_sg(hwif->pci_dev, 307 hwif->sg_table, 308 hwif->sg_nents, 309 hwif->sg_dma_direction); 310 return 0; /* revert to PIO for this request */ 311} 312 313EXPORT_SYMBOL_GPL(ide_build_dmatable); 314 315/** 316 * ide_destroy_dmatable - clean up DMA mapping 317 * @drive: The drive to unmap 318 * 319 * Teardown mappings after DMA has completed. This must be called 320 * after the completion of each use of ide_build_dmatable and before 321 * the next use of ide_build_dmatable. Failure to do so will cause 322 * an oops as only one mapping can be live for each target at a given 323 * time. 324 */ 325 326void ide_destroy_dmatable (ide_drive_t *drive) 327{ 328 struct pci_dev *dev = HWIF(drive)->pci_dev; 329 struct scatterlist *sg = HWIF(drive)->sg_table; 330 int nents = HWIF(drive)->sg_nents; 331 332 pci_unmap_sg(dev, sg, nents, HWIF(drive)->sg_dma_direction); 333} 334 335EXPORT_SYMBOL_GPL(ide_destroy_dmatable); 336 337/** 338 * config_drive_for_dma - attempt to activate IDE DMA 339 * @drive: the drive to place in DMA mode 340 * 341 * If the drive supports at least mode 2 DMA or UDMA of any kind 342 * then attempt to place it into DMA mode. Drives that are known to 343 * support DMA but predate the DMA properties or that are known 344 * to have DMA handling bugs are also set up appropriately based 345 * on the good/bad drive lists. 346 */ 347 348static int config_drive_for_dma (ide_drive_t *drive) 349{ 350 struct hd_driveid *id = drive->id; 351 ide_hwif_t *hwif = HWIF(drive); 352 353 if ((id->capability & 1) && hwif->autodma) { 354 /* 355 * Enable DMA on any drive that has 356 * UltraDMA (mode 0/1/2/3/4/5/6) enabled 357 */ 358 if ((id->field_valid & 4) && ((id->dma_ultra >> 8) & 0x7f)) 359 return hwif->ide_dma_on(drive); 360 /* 361 * Enable DMA on any drive that has mode2 DMA 362 * (multi or single) enabled 363 */ 364 if (id->field_valid & 2) /* regular DMA */ 365 if ((id->dma_mword & 0x404) == 0x404 || 366 (id->dma_1word & 0x404) == 0x404) 367 return hwif->ide_dma_on(drive); 368 369 /* Consult the list of known "good" drives */ 370 if (__ide_dma_good_drive(drive)) 371 return hwif->ide_dma_on(drive); 372 } 373// if (hwif->tuneproc != NULL) hwif->tuneproc(drive, 255); 374 return hwif->ide_dma_off_quietly(drive); 375} 376 377/** 378 * dma_timer_expiry - handle a DMA timeout 379 * @drive: Drive that timed out 380 * 381 * An IDE DMA transfer timed out. In the event of an error we ask 382 * the driver to resolve the problem, if a DMA transfer is still 383 * in progress we continue to wait (arguably we need to add a 384 * secondary 'I don't care what the drive thinks' timeout here) 385 * Finally if we have an interrupt we let it complete the I/O. 386 * But only one time - we clear expiry and if it's still not 387 * completed after WAIT_CMD, we error and retry in PIO. 388 * This can occur if an interrupt is lost or due to hang or bugs. 389 */ 390 391static int dma_timer_expiry (ide_drive_t *drive) 392{ 393 ide_hwif_t *hwif = HWIF(drive); 394 u8 dma_stat = hwif->INB(hwif->dma_status); 395 396 printk(KERN_WARNING "%s: dma_timer_expiry: dma status == 0x%02x\n", 397 drive->name, dma_stat); 398 399 if ((dma_stat & 0x18) == 0x18) /* BUSY Stupid Early Timer !! */ 400 return WAIT_CMD; 401 402 HWGROUP(drive)->expiry = NULL; /* one free ride for now */ 403 404 /* 1 dmaing, 2 error, 4 intr */ 405 if (dma_stat & 2) /* ERROR */ 406 return -1; 407 408 if (dma_stat & 1) /* DMAing */ 409 return WAIT_CMD; 410 411 if (dma_stat & 4) /* Got an Interrupt */ 412 return WAIT_CMD; 413 414 return 0; /* Status is unknown -- reset the bus */ 415} 416 417/** 418 * __ide_dma_host_off - Generic DMA kill 419 * @drive: drive to control 420 * 421 * Perform the generic IDE controller DMA off operation. This 422 * works for most IDE bus mastering controllers 423 */ 424 425int __ide_dma_host_off (ide_drive_t *drive) 426{ 427 ide_hwif_t *hwif = HWIF(drive); 428 u8 unit = (drive->select.b.unit & 0x01); 429 u8 dma_stat = hwif->INB(hwif->dma_status); 430 431 hwif->OUTB((dma_stat & ~(1<<(5+unit))), hwif->dma_status); 432 return 0; 433} 434 435EXPORT_SYMBOL(__ide_dma_host_off); 436 437/** 438 * __ide_dma_host_off_quietly - Generic DMA kill 439 * @drive: drive to control 440 * 441 * Turn off the current DMA on this IDE controller. 442 */ 443 444int __ide_dma_off_quietly (ide_drive_t *drive) 445{ 446 drive->using_dma = 0; 447 ide_toggle_bounce(drive, 0); 448 449 if (HWIF(drive)->ide_dma_host_off(drive)) 450 return 1; 451 452 return 0; 453} 454 455EXPORT_SYMBOL(__ide_dma_off_quietly); 456#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */ 457 458/** 459 * __ide_dma_off - disable DMA on a device 460 * @drive: drive to disable DMA on 461 * 462 * Disable IDE DMA for a device on this IDE controller. 463 * Inform the user that DMA has been disabled. 464 */ 465 466int __ide_dma_off (ide_drive_t *drive) 467{ 468 printk(KERN_INFO "%s: DMA disabled\n", drive->name); 469 return HWIF(drive)->ide_dma_off_quietly(drive); 470} 471 472EXPORT_SYMBOL(__ide_dma_off); 473 474#ifdef CONFIG_BLK_DEV_IDEDMA_PCI 475/** 476 * __ide_dma_host_on - Enable DMA on a host 477 * @drive: drive to enable for DMA 478 * 479 * Enable DMA on an IDE controller following generic bus mastering 480 * IDE controller behaviour 481 */ 482 483int __ide_dma_host_on (ide_drive_t *drive) 484{ 485 if (drive->using_dma) { 486 ide_hwif_t *hwif = HWIF(drive); 487 u8 unit = (drive->select.b.unit & 0x01); 488 u8 dma_stat = hwif->INB(hwif->dma_status); 489 490 hwif->OUTB((dma_stat|(1<<(5+unit))), hwif->dma_status); 491 return 0; 492 } 493 return 1; 494} 495 496EXPORT_SYMBOL(__ide_dma_host_on); 497 498/** 499 * __ide_dma_on - Enable DMA on a device 500 * @drive: drive to enable DMA on 501 * 502 * Enable IDE DMA for a device on this IDE controller. 503 */ 504 505int __ide_dma_on (ide_drive_t *drive) 506{ 507 /* consult the list of known "bad" drives */ 508 if (__ide_dma_bad_drive(drive)) 509 return 1; 510 511 drive->using_dma = 1; 512 ide_toggle_bounce(drive, 1); 513 514 if (HWIF(drive)->ide_dma_host_on(drive)) 515 return 1; 516 517 return 0; 518} 519 520EXPORT_SYMBOL(__ide_dma_on); 521 522/** 523 * __ide_dma_check - check DMA setup 524 * @drive: drive to check 525 * 526 * Don't use - due for extermination 527 */ 528 529int __ide_dma_check (ide_drive_t *drive) 530{ 531 return config_drive_for_dma(drive); 532} 533 534EXPORT_SYMBOL(__ide_dma_check); 535 536/** 537 * ide_dma_setup - begin a DMA phase 538 * @drive: target device 539 * 540 * Build an IDE DMA PRD (IDE speak for scatter gather table) 541 * and then set up the DMA transfer registers for a device 542 * that follows generic IDE PCI DMA behaviour. Controllers can 543 * override this function if they need to 544 * 545 * Returns 0 on success. If a PIO fallback is required then 1 546 * is returned. 547 */ 548 549int ide_dma_setup(ide_drive_t *drive) 550{ 551 ide_hwif_t *hwif = drive->hwif; 552 struct request *rq = HWGROUP(drive)->rq; 553 unsigned int reading; 554 u8 dma_stat; 555 556 if (rq_data_dir(rq)) 557 reading = 0; 558 else 559 reading = 1 << 3; 560 561 /* fall back to pio! */ 562 if (!ide_build_dmatable(drive, rq)) { 563 ide_map_sg(drive, rq); 564 return 1; 565 } 566 567 /* PRD table */ 568 if (hwif->mmio) 569 writel(hwif->dmatable_dma, (void __iomem *)hwif->dma_prdtable); 570 else 571 outl(hwif->dmatable_dma, hwif->dma_prdtable); 572 573 /* specify r/w */ 574 hwif->OUTB(reading, hwif->dma_command); 575 576 /* read dma_status for INTR & ERROR flags */ 577 dma_stat = hwif->INB(hwif->dma_status); 578 579 /* clear INTR & ERROR flags */ 580 hwif->OUTB(dma_stat|6, hwif->dma_status); 581 drive->waiting_for_dma = 1; 582 return 0; 583} 584 585EXPORT_SYMBOL_GPL(ide_dma_setup); 586 587static void ide_dma_exec_cmd(ide_drive_t *drive, u8 command) 588{ 589 /* issue cmd to drive */ 590 ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry); 591} 592 593void ide_dma_start(ide_drive_t *drive) 594{ 595 ide_hwif_t *hwif = HWIF(drive); 596 u8 dma_cmd = hwif->INB(hwif->dma_command); 597 598 /* Note that this is done *after* the cmd has 599 * been issued to the drive, as per the BM-IDE spec. 600 * The Promise Ultra33 doesn't work correctly when 601 * we do this part before issuing the drive cmd. 602 */ 603 /* start DMA */ 604 hwif->OUTB(dma_cmd|1, hwif->dma_command); 605 hwif->dma = 1; 606 wmb(); 607} 608 609EXPORT_SYMBOL_GPL(ide_dma_start); 610 611/* returns 1 on error, 0 otherwise */ 612int __ide_dma_end (ide_drive_t *drive) 613{ 614 ide_hwif_t *hwif = HWIF(drive); 615 u8 dma_stat = 0, dma_cmd = 0; 616 617 drive->waiting_for_dma = 0; 618 /* get dma_command mode */ 619 dma_cmd = hwif->INB(hwif->dma_command); 620 /* stop DMA */ 621 hwif->OUTB(dma_cmd&~1, hwif->dma_command); 622 /* get DMA status */ 623 dma_stat = hwif->INB(hwif->dma_status); 624 /* clear the INTR & ERROR bits */ 625 hwif->OUTB(dma_stat|6, hwif->dma_status); 626 /* purge DMA mappings */ 627 ide_destroy_dmatable(drive); 628 /* verify good DMA status */ 629 hwif->dma = 0; 630 wmb(); 631 return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0; 632} 633 634EXPORT_SYMBOL(__ide_dma_end); 635 636/* returns 1 if dma irq issued, 0 otherwise */ 637static int __ide_dma_test_irq(ide_drive_t *drive) 638{ 639 ide_hwif_t *hwif = HWIF(drive); 640 u8 dma_stat = hwif->INB(hwif->dma_status); 641 642#if 0 /* do not set unless you know what you are doing */ 643 if (dma_stat & 4) { 644 u8 stat = hwif->INB(IDE_STATUS_REG); 645 hwif->OUTB(hwif->dma_status, dma_stat & 0xE4); 646 } 647#endif 648 /* return 1 if INTR asserted */ 649 if ((dma_stat & 4) == 4) 650 return 1; 651 if (!drive->waiting_for_dma) 652 printk(KERN_WARNING "%s: (%s) called while not waiting\n", 653 drive->name, __FUNCTION__); 654 return 0; 655} 656#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */ 657 658int __ide_dma_bad_drive (ide_drive_t *drive) 659{ 660 struct hd_driveid *id = drive->id; 661 662 int blacklist = ide_in_drive_list(id, drive_blacklist); 663 if (blacklist) { 664 printk(KERN_WARNING "%s: Disabling (U)DMA for %s (blacklisted)\n", 665 drive->name, id->model); 666 return blacklist; 667 } 668 return 0; 669} 670 671EXPORT_SYMBOL(__ide_dma_bad_drive); 672 673int __ide_dma_good_drive (ide_drive_t *drive) 674{ 675 struct hd_driveid *id = drive->id; 676 return ide_in_drive_list(id, drive_whitelist); 677} 678 679EXPORT_SYMBOL(__ide_dma_good_drive); 680 681int ide_use_dma(ide_drive_t *drive) 682{ 683 struct hd_driveid *id = drive->id; 684 ide_hwif_t *hwif = drive->hwif; 685 686 if ((id->capability & 1) == 0 || drive->autodma == 0) 687 return 0; 688 689 /* consult the list of known "bad" drives */ 690 if (__ide_dma_bad_drive(drive)) 691 return 0; 692 693 /* capable of UltraDMA modes */ 694 if (id->field_valid & 4) { 695 if (hwif->ultra_mask & id->dma_ultra) 696 return 1; 697 } 698 699 /* capable of regular DMA modes */ 700 if (id->field_valid & 2) { 701 if (hwif->mwdma_mask & id->dma_mword) 702 return 1; 703 if (hwif->swdma_mask & id->dma_1word) 704 return 1; 705 } 706 707 /* consult the list of known "good" drives */ 708 if (__ide_dma_good_drive(drive) && id->eide_dma_time < 150) 709 return 1; 710 711 return 0; 712} 713 714EXPORT_SYMBOL_GPL(ide_use_dma); 715 716void ide_dma_verbose(ide_drive_t *drive) 717{ 718 struct hd_driveid *id = drive->id; 719 ide_hwif_t *hwif = HWIF(drive); 720 721 if (id->field_valid & 4) { 722 if ((id->dma_ultra >> 8) && (id->dma_mword >> 8)) 723 goto bug_dma_off; 724 if (id->dma_ultra & ((id->dma_ultra >> 8) & hwif->ultra_mask)) { 725 if (((id->dma_ultra >> 11) & 0x1F) && 726 eighty_ninty_three(drive)) { 727 if ((id->dma_ultra >> 15) & 1) { 728 printk(", UDMA(mode 7)"); 729 } else if ((id->dma_ultra >> 14) & 1) { 730 printk(", UDMA(133)"); 731 } else if ((id->dma_ultra >> 13) & 1) { 732 printk(", UDMA(100)"); 733 } else if ((id->dma_ultra >> 12) & 1) { 734 printk(", UDMA(66)"); 735 } else if ((id->dma_ultra >> 11) & 1) { 736 printk(", UDMA(44)"); 737 } else 738 goto mode_two; 739 } else { 740 mode_two: 741 if ((id->dma_ultra >> 10) & 1) { 742 printk(", UDMA(33)"); 743 } else if ((id->dma_ultra >> 9) & 1) { 744 printk(", UDMA(25)"); 745 } else if ((id->dma_ultra >> 8) & 1) { 746 printk(", UDMA(16)"); 747 } 748 } 749 } else { 750 printk(", (U)DMA"); /* Can be BIOS-enabled! */ 751 } 752 } else if (id->field_valid & 2) { 753 if ((id->dma_mword >> 8) && (id->dma_1word >> 8)) 754 goto bug_dma_off; 755 printk(", DMA"); 756 } else if (id->field_valid & 1) { 757 goto bug_dma_off; 758 } 759 return; 760bug_dma_off: 761 printk(", BUG DMA OFF"); 762 hwif->ide_dma_off_quietly(drive); 763 return; 764} 765 766EXPORT_SYMBOL(ide_dma_verbose); 767 768#ifdef CONFIG_BLK_DEV_IDEDMA_PCI 769int __ide_dma_lostirq (ide_drive_t *drive) 770{ 771 printk("%s: DMA interrupt recovery\n", drive->name); 772 return 1; 773} 774 775EXPORT_SYMBOL(__ide_dma_lostirq); 776 777int __ide_dma_timeout (ide_drive_t *drive) 778{ 779 printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name); 780 if (HWIF(drive)->ide_dma_test_irq(drive)) 781 return 0; 782 783 return HWIF(drive)->ide_dma_end(drive); 784} 785 786EXPORT_SYMBOL(__ide_dma_timeout); 787 788/* 789 * Needed for allowing full modular support of ide-driver 790 */ 791static int ide_release_dma_engine(ide_hwif_t *hwif) 792{ 793 if (hwif->dmatable_cpu) { 794 pci_free_consistent(hwif->pci_dev, 795 PRD_ENTRIES * PRD_BYTES, 796 hwif->dmatable_cpu, 797 hwif->dmatable_dma); 798 hwif->dmatable_cpu = NULL; 799 } 800 return 1; 801} 802 803static int ide_release_iomio_dma(ide_hwif_t *hwif) 804{ 805 release_region(hwif->dma_base, 8); 806 if (hwif->extra_ports) 807 release_region(hwif->extra_base, hwif->extra_ports); 808 return 1; 809} 810 811/* 812 * Needed for allowing full modular support of ide-driver 813 */ 814int ide_release_dma(ide_hwif_t *hwif) 815{ 816 ide_release_dma_engine(hwif); 817 818 if (hwif->mmio) 819 return 1; 820 else 821 return ide_release_iomio_dma(hwif); 822} 823 824static int ide_allocate_dma_engine(ide_hwif_t *hwif) 825{ 826 hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev, 827 PRD_ENTRIES * PRD_BYTES, 828 &hwif->dmatable_dma); 829 830 if (hwif->dmatable_cpu) 831 return 0; 832 833 printk(KERN_ERR "%s: -- Error, unable to allocate DMA table.\n", 834 hwif->cds->name); 835 836 return 1; 837} 838 839static int ide_mapped_mmio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int ports) 840{ 841 printk(KERN_INFO " %s: MMIO-DMA ", hwif->name); 842 843 hwif->dma_base = base; 844 845 if(hwif->mate) 846 hwif->dma_master = (hwif->channel) ? hwif->mate->dma_base : base; 847 else 848 hwif->dma_master = base; 849 return 0; 850} 851 852static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int ports) 853{ 854 printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx", 855 hwif->name, base, base + ports - 1); 856 857 if (!request_region(base, ports, hwif->name)) { 858 printk(" -- Error, ports in use.\n"); 859 return 1; 860 } 861 862 hwif->dma_base = base; 863 864 if (hwif->cds->extra) { 865 hwif->extra_base = base + (hwif->channel ? 8 : 16); 866 867 if (!hwif->mate || !hwif->mate->extra_ports) { 868 if (!request_region(hwif->extra_base, 869 hwif->cds->extra, hwif->cds->name)) { 870 printk(" -- Error, extra ports in use.\n"); 871 release_region(base, ports); 872 return 1; 873 } 874 hwif->extra_ports = hwif->cds->extra; 875 } 876 } 877 878 if(hwif->mate) 879 hwif->dma_master = (hwif->channel) ? hwif->mate->dma_base:base; 880 else 881 hwif->dma_master = base; 882 return 0; 883} 884 885static int ide_dma_iobase(ide_hwif_t *hwif, unsigned long base, unsigned int ports) 886{ 887 if (hwif->mmio) 888 return ide_mapped_mmio_dma(hwif, base,ports); 889 890 return ide_iomio_dma(hwif, base, ports); 891} 892 893/* 894 * This can be called for a dynamically installed interface. Don't __init it 895 */ 896void ide_setup_dma (ide_hwif_t *hwif, unsigned long dma_base, unsigned int num_ports) 897{ 898 if (ide_dma_iobase(hwif, dma_base, num_ports)) 899 return; 900 901 if (ide_allocate_dma_engine(hwif)) { 902 ide_release_dma(hwif); 903 return; 904 } 905 906 if (!(hwif->dma_command)) 907 hwif->dma_command = hwif->dma_base; 908 if (!(hwif->dma_vendor1)) 909 hwif->dma_vendor1 = (hwif->dma_base + 1); 910 if (!(hwif->dma_status)) 911 hwif->dma_status = (hwif->dma_base + 2); 912 if (!(hwif->dma_vendor3)) 913 hwif->dma_vendor3 = (hwif->dma_base + 3); 914 if (!(hwif->dma_prdtable)) 915 hwif->dma_prdtable = (hwif->dma_base + 4); 916 917 if (!hwif->ide_dma_off_quietly) 918 hwif->ide_dma_off_quietly = &__ide_dma_off_quietly; 919 if (!hwif->ide_dma_host_off) 920 hwif->ide_dma_host_off = &__ide_dma_host_off; 921 if (!hwif->ide_dma_on) 922 hwif->ide_dma_on = &__ide_dma_on; 923 if (!hwif->ide_dma_host_on) 924 hwif->ide_dma_host_on = &__ide_dma_host_on; 925 if (!hwif->ide_dma_check) 926 hwif->ide_dma_check = &__ide_dma_check; 927 if (!hwif->dma_setup) 928 hwif->dma_setup = &ide_dma_setup; 929 if (!hwif->dma_exec_cmd) 930 hwif->dma_exec_cmd = &ide_dma_exec_cmd; 931 if (!hwif->dma_start) 932 hwif->dma_start = &ide_dma_start; 933 if (!hwif->ide_dma_end) 934 hwif->ide_dma_end = &__ide_dma_end; 935 if (!hwif->ide_dma_test_irq) 936 hwif->ide_dma_test_irq = &__ide_dma_test_irq; 937 if (!hwif->ide_dma_timeout) 938 hwif->ide_dma_timeout = &__ide_dma_timeout; 939 if (!hwif->ide_dma_lostirq) 940 hwif->ide_dma_lostirq = &__ide_dma_lostirq; 941 942 if (hwif->chipset != ide_trm290) { 943 u8 dma_stat = hwif->INB(hwif->dma_status); 944 printk(", BIOS settings: %s:%s, %s:%s", 945 hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "pio", 946 hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "pio"); 947 } 948 printk("\n"); 949 950 BUG_ON(!hwif->dma_master); 951} 952 953EXPORT_SYMBOL_GPL(ide_setup_dma); 954#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */ 955