2 * linux/drivers/ide/ide-dma.c Version 4.10 June 9, 2000
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
9 * Special Thanks to Mark for his Six years of work.
11 * Copyright (c) 1995-1998 Mark Lord
12 * May be copied or modified under the terms of the GNU General Public License
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").
22 * Pretty much the same code works for other IDE PCI bus-mastering chipsets.
24 * DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies).
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.
32 * Use "hdparm -i" to view modes supported by a given drive.
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.
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.
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.
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.
52 * Keep an eye on /var/adm/messages for "DMA disabled" messages.
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).
59 * Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for
60 * fixing the problem with the BIOS on some Acer motherboards.
62 * Thanks to "Benoit Poulot-Cazajous" <poulot@chorus.fr> for testing
63 * "TX" chipset compatibility and for providing patches for the "TX" chipset.
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.
68 * Most importantly, thanks to Robert Bringman <rob@mars.trion.com>
69 * for supplying a Promise UDMA board & WD UDMA drive for this work!
71 * And, yes, Intel Zappa boards really *do* use both PIIX IDE ports.
73 * ATA-66/100 and recovery functions, I forgot the rest......
77 #include <linux/config.h>
78 #include <linux/module.h>
79 #include <linux/types.h>
80 #include <linux/kernel.h>
81 #include <linux/timer.h>
83 #include <linux/interrupt.h>
84 #include <linux/pci.h>
85 #include <linux/init.h>
86 #include <linux/ide.h>
87 #include <linux/delay.h>
88 #include <linux/scatterlist.h>
93 static const struct drive_list_entry drive_whitelist [] = {
95 { "Micropolis 2112A" , "ALL" },
96 { "CONNER CTMA 4000" , "ALL" },
97 { "CONNER CTT8000-A" , "ALL" },
98 { "ST34342A" , "ALL" },
102 static const struct drive_list_entry drive_blacklist [] = {
104 { "WDC AC11000H" , "ALL" },
105 { "WDC AC22100H" , "ALL" },
106 { "WDC AC32500H" , "ALL" },
107 { "WDC AC33100H" , "ALL" },
108 { "WDC AC31600H" , "ALL" },
109 { "WDC AC32100H" , "24.09P07" },
110 { "WDC AC23200L" , "21.10N21" },
111 { "Compaq CRD-8241B" , "ALL" },
112 { "CRD-8400B" , "ALL" },
113 { "CRD-8480B", "ALL" },
114 { "CRD-8482B", "ALL" },
115 { "CRD-84" , "ALL" },
116 { "SanDisk SDP3B" , "ALL" },
117 { "SanDisk SDP3B-64" , "ALL" },
118 { "SANYO CD-ROM CRD" , "ALL" },
119 { "HITACHI CDR-8" , "ALL" },
120 { "HITACHI CDR-8335" , "ALL" },
121 { "HITACHI CDR-8435" , "ALL" },
122 { "Toshiba CD-ROM XM-6202B" , "ALL" },
123 { "CD-532E-A" , "ALL" },
124 { "E-IDE CD-ROM CR-840", "ALL" },
125 { "CD-ROM Drive/F5A", "ALL" },
126 { "WPI CDD-820", "ALL" },
127 { "SAMSUNG CD-ROM SC-148C", "ALL" },
128 { "SAMSUNG CD-ROM SC", "ALL" },
129 { "SanDisk SDP3B-64" , "ALL" },
130 { "ATAPI CD-ROM DRIVE 40X MAXIMUM", "ALL" },
131 { "_NEC DV5800A", "ALL" },
137 * ide_in_drive_list - look for drive in black/white list
138 * @id: drive identifier
139 * @drive_table: list to inspect
141 * Look for a drive in the blacklist and the whitelist tables
142 * Returns 1 if the drive is found in the table.
145 int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table)
147 for ( ; drive_table->id_model ; drive_table++)
148 if ((!strcmp(drive_table->id_model, id->model)) &&
149 ((strstr(drive_table->id_firmware, id->fw_rev)) ||
150 (!strcmp(drive_table->id_firmware, "ALL"))))
155 EXPORT_SYMBOL_GPL(ide_in_drive_list);
158 * ide_dma_intr - IDE DMA interrupt handler
159 * @drive: the drive the interrupt is for
161 * Handle an interrupt completing a read/write DMA transfer on an
165 ide_startstop_t ide_dma_intr (ide_drive_t *drive)
167 u8 stat = 0, dma_stat = 0;
169 dma_stat = HWIF(drive)->ide_dma_end(drive);
170 stat = HWIF(drive)->INB(IDE_STATUS_REG); /* get drive status */
171 if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) {
173 struct request *rq = HWGROUP(drive)->rq;
178 drv = *(ide_driver_t **)rq->rq_disk->private_data;
179 drv->end_request(drive, 1, rq->nr_sectors);
181 ide_end_request(drive, 1, rq->nr_sectors);
184 printk(KERN_ERR "%s: dma_intr: bad DMA status (dma_stat=%x)\n",
185 drive->name, dma_stat);
187 return ide_error(drive, "dma_intr", stat);
190 EXPORT_SYMBOL_GPL(ide_dma_intr);
192 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
194 * ide_build_sglist - map IDE scatter gather for DMA I/O
195 * @drive: the drive to build the DMA table for
196 * @rq: the request holding the sg list
198 * Perform the PCI mapping magic necessary to access the source or
199 * target buffers of a request via PCI DMA. The lower layers of the
200 * kernel provide the necessary cache management so that we can
201 * operate in a portable fashion
204 int ide_build_sglist(ide_drive_t *drive, struct request *rq)
206 ide_hwif_t *hwif = HWIF(drive);
207 struct scatterlist *sg = hwif->sg_table;
209 if ((rq->flags & REQ_DRIVE_TASKFILE) && rq->nr_sectors > 256)
212 ide_map_sg(drive, rq);
214 if (rq_data_dir(rq) == READ)
215 hwif->sg_dma_direction = PCI_DMA_FROMDEVICE;
217 hwif->sg_dma_direction = PCI_DMA_TODEVICE;
219 return pci_map_sg(hwif->pci_dev, sg, hwif->sg_nents, hwif->sg_dma_direction);
222 EXPORT_SYMBOL_GPL(ide_build_sglist);
225 * ide_build_dmatable - build IDE DMA table
227 * ide_build_dmatable() prepares a dma request. We map the command
228 * to get the pci bus addresses of the buffers and then build up
229 * the PRD table that the IDE layer wants to be fed. The code
230 * knows about the 64K wrap bug in the CS5530.
232 * Returns the number of built PRD entries if all went okay,
233 * returns 0 otherwise.
235 * May also be invoked from trm290.c
238 int ide_build_dmatable (ide_drive_t *drive, struct request *rq)
240 ide_hwif_t *hwif = HWIF(drive);
241 unsigned int *table = hwif->dmatable_cpu;
242 unsigned int is_trm290 = (hwif->chipset == ide_trm290) ? 1 : 0;
243 unsigned int count = 0;
245 struct scatterlist *sg;
247 hwif->sg_nents = i = ide_build_sglist(drive, rq);
257 cur_addr = sg_dma_address(sg);
258 cur_len = sg_dma_len(sg);
261 * Fill in the dma table, without crossing any 64kB boundaries.
262 * Most hardware requires 16-bit alignment of all blocks,
263 * but the trm290 requires 32-bit alignment.
267 if (count++ >= PRD_ENTRIES) {
268 printk(KERN_ERR "%s: DMA table too small\n", drive->name);
269 goto use_pio_instead;
271 u32 xcount, bcount = 0x10000 - (cur_addr & 0xffff);
273 if (bcount > cur_len)
275 *table++ = cpu_to_le32(cur_addr);
276 xcount = bcount & 0xffff;
278 xcount = ((xcount >> 2) - 1) << 16;
279 if (xcount == 0x0000) {
281 * Most chipsets correctly interpret a length of 0x0000 as 64KB,
282 * but at least one (e.g. CS5530) misinterprets it as zero (!).
283 * So here we break the 64KB entry into two 32KB entries instead.
285 if (count++ >= PRD_ENTRIES) {
286 printk(KERN_ERR "%s: DMA table too small\n", drive->name);
287 goto use_pio_instead;
289 *table++ = cpu_to_le32(0x8000);
290 *table++ = cpu_to_le32(cur_addr + 0x8000);
293 *table++ = cpu_to_le32(xcount);
305 *--table |= cpu_to_le32(0x80000000);
308 printk(KERN_ERR "%s: empty DMA table?\n", drive->name);
310 pci_unmap_sg(hwif->pci_dev,
313 hwif->sg_dma_direction);
314 return 0; /* revert to PIO for this request */
317 EXPORT_SYMBOL_GPL(ide_build_dmatable);
320 * ide_destroy_dmatable - clean up DMA mapping
321 * @drive: The drive to unmap
323 * Teardown mappings after DMA has completed. This must be called
324 * after the completion of each use of ide_build_dmatable and before
325 * the next use of ide_build_dmatable. Failure to do so will cause
326 * an oops as only one mapping can be live for each target at a given
330 void ide_destroy_dmatable (ide_drive_t *drive)
332 struct pci_dev *dev = HWIF(drive)->pci_dev;
333 struct scatterlist *sg = HWIF(drive)->sg_table;
334 int nents = HWIF(drive)->sg_nents;
336 pci_unmap_sg(dev, sg, nents, HWIF(drive)->sg_dma_direction);
339 EXPORT_SYMBOL_GPL(ide_destroy_dmatable);
342 * config_drive_for_dma - attempt to activate IDE DMA
343 * @drive: the drive to place in DMA mode
345 * If the drive supports at least mode 2 DMA or UDMA of any kind
346 * then attempt to place it into DMA mode. Drives that are known to
347 * support DMA but predate the DMA properties or that are known
348 * to have DMA handling bugs are also set up appropriately based
349 * on the good/bad drive lists.
352 static int config_drive_for_dma (ide_drive_t *drive)
354 struct hd_driveid *id = drive->id;
355 ide_hwif_t *hwif = HWIF(drive);
357 if ((id->capability & 1) && hwif->autodma) {
359 * Enable DMA on any drive that has
360 * UltraDMA (mode 0/1/2/3/4/5/6) enabled
362 if ((id->field_valid & 4) && ((id->dma_ultra >> 8) & 0x7f))
363 return hwif->ide_dma_on(drive);
365 * Enable DMA on any drive that has mode2 DMA
366 * (multi or single) enabled
368 if (id->field_valid & 2) /* regular DMA */
369 if ((id->dma_mword & 0x404) == 0x404 ||
370 (id->dma_1word & 0x404) == 0x404)
371 return hwif->ide_dma_on(drive);
373 /* Consult the list of known "good" drives */
374 if (__ide_dma_good_drive(drive))
375 return hwif->ide_dma_on(drive);
377 // if (hwif->tuneproc != NULL) hwif->tuneproc(drive, 255);
378 return hwif->ide_dma_off_quietly(drive);
382 * dma_timer_expiry - handle a DMA timeout
383 * @drive: Drive that timed out
385 * An IDE DMA transfer timed out. In the event of an error we ask
386 * the driver to resolve the problem, if a DMA transfer is still
387 * in progress we continue to wait (arguably we need to add a
388 * secondary 'I don't care what the drive thinks' timeout here)
389 * Finally if we have an interrupt we let it complete the I/O.
390 * But only one time - we clear expiry and if it's still not
391 * completed after WAIT_CMD, we error and retry in PIO.
392 * This can occur if an interrupt is lost or due to hang or bugs.
395 static int dma_timer_expiry (ide_drive_t *drive)
397 ide_hwif_t *hwif = HWIF(drive);
398 u8 dma_stat = hwif->INB(hwif->dma_status);
400 printk(KERN_WARNING "%s: dma_timer_expiry: dma status == 0x%02x\n",
401 drive->name, dma_stat);
403 if ((dma_stat & 0x18) == 0x18) /* BUSY Stupid Early Timer !! */
406 HWGROUP(drive)->expiry = NULL; /* one free ride for now */
408 /* 1 dmaing, 2 error, 4 intr */
409 if (dma_stat & 2) /* ERROR */
412 if (dma_stat & 1) /* DMAing */
415 if (dma_stat & 4) /* Got an Interrupt */
418 return 0; /* Status is unknown -- reset the bus */
422 * __ide_dma_host_off - Generic DMA kill
423 * @drive: drive to control
425 * Perform the generic IDE controller DMA off operation. This
426 * works for most IDE bus mastering controllers
429 int __ide_dma_host_off (ide_drive_t *drive)
431 ide_hwif_t *hwif = HWIF(drive);
432 u8 unit = (drive->select.b.unit & 0x01);
433 u8 dma_stat = hwif->INB(hwif->dma_status);
435 hwif->OUTB((dma_stat & ~(1<<(5+unit))), hwif->dma_status);
439 EXPORT_SYMBOL(__ide_dma_host_off);
442 * __ide_dma_host_off_quietly - Generic DMA kill
443 * @drive: drive to control
445 * Turn off the current DMA on this IDE controller.
448 int __ide_dma_off_quietly (ide_drive_t *drive)
450 drive->using_dma = 0;
451 ide_toggle_bounce(drive, 0);
453 if (HWIF(drive)->ide_dma_host_off(drive))
459 EXPORT_SYMBOL(__ide_dma_off_quietly);
460 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
463 * __ide_dma_off - disable DMA on a device
464 * @drive: drive to disable DMA on
466 * Disable IDE DMA for a device on this IDE controller.
467 * Inform the user that DMA has been disabled.
470 int __ide_dma_off (ide_drive_t *drive)
472 printk(KERN_INFO "%s: DMA disabled\n", drive->name);
473 return HWIF(drive)->ide_dma_off_quietly(drive);
476 EXPORT_SYMBOL(__ide_dma_off);
478 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
480 * __ide_dma_host_on - Enable DMA on a host
481 * @drive: drive to enable for DMA
483 * Enable DMA on an IDE controller following generic bus mastering
484 * IDE controller behaviour
487 int __ide_dma_host_on (ide_drive_t *drive)
489 if (drive->using_dma) {
490 ide_hwif_t *hwif = HWIF(drive);
491 u8 unit = (drive->select.b.unit & 0x01);
492 u8 dma_stat = hwif->INB(hwif->dma_status);
494 hwif->OUTB((dma_stat|(1<<(5+unit))), hwif->dma_status);
500 EXPORT_SYMBOL(__ide_dma_host_on);
503 * __ide_dma_on - Enable DMA on a device
504 * @drive: drive to enable DMA on
506 * Enable IDE DMA for a device on this IDE controller.
509 int __ide_dma_on (ide_drive_t *drive)
511 /* consult the list of known "bad" drives */
512 if (__ide_dma_bad_drive(drive))
515 drive->using_dma = 1;
516 ide_toggle_bounce(drive, 1);
518 if (HWIF(drive)->ide_dma_host_on(drive))
524 EXPORT_SYMBOL(__ide_dma_on);
527 * __ide_dma_check - check DMA setup
528 * @drive: drive to check
530 * Don't use - due for extermination
533 int __ide_dma_check (ide_drive_t *drive)
535 return config_drive_for_dma(drive);
538 EXPORT_SYMBOL(__ide_dma_check);
541 * ide_dma_setup - begin a DMA phase
542 * @drive: target device
544 * Build an IDE DMA PRD (IDE speak for scatter gather table)
545 * and then set up the DMA transfer registers for a device
546 * that follows generic IDE PCI DMA behaviour. Controllers can
547 * override this function if they need to
549 * Returns 0 on success. If a PIO fallback is required then 1
553 int ide_dma_setup(ide_drive_t *drive)
555 ide_hwif_t *hwif = drive->hwif;
556 struct request *rq = HWGROUP(drive)->rq;
557 unsigned int reading;
565 /* fall back to pio! */
566 if (!ide_build_dmatable(drive, rq)) {
567 ide_map_sg(drive, rq);
572 hwif->OUTL(hwif->dmatable_dma, hwif->dma_prdtable);
575 hwif->OUTB(reading, hwif->dma_command);
577 /* read dma_status for INTR & ERROR flags */
578 dma_stat = hwif->INB(hwif->dma_status);
580 /* clear INTR & ERROR flags */
581 hwif->OUTB(dma_stat|6, hwif->dma_status);
582 drive->waiting_for_dma = 1;
586 EXPORT_SYMBOL_GPL(ide_dma_setup);
588 static void ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
590 /* issue cmd to drive */
591 ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry);
594 void ide_dma_start(ide_drive_t *drive)
596 ide_hwif_t *hwif = HWIF(drive);
597 u8 dma_cmd = hwif->INB(hwif->dma_command);
599 /* Note that this is done *after* the cmd has
600 * been issued to the drive, as per the BM-IDE spec.
601 * The Promise Ultra33 doesn't work correctly when
602 * we do this part before issuing the drive cmd.
605 hwif->OUTB(dma_cmd|1, hwif->dma_command);
610 EXPORT_SYMBOL_GPL(ide_dma_start);
612 /* returns 1 on error, 0 otherwise */
613 int __ide_dma_end (ide_drive_t *drive)
615 ide_hwif_t *hwif = HWIF(drive);
616 u8 dma_stat = 0, dma_cmd = 0;
618 drive->waiting_for_dma = 0;
619 /* get dma_command mode */
620 dma_cmd = hwif->INB(hwif->dma_command);
622 hwif->OUTB(dma_cmd&~1, hwif->dma_command);
624 dma_stat = hwif->INB(hwif->dma_status);
625 /* clear the INTR & ERROR bits */
626 hwif->OUTB(dma_stat|6, hwif->dma_status);
627 /* purge DMA mappings */
628 ide_destroy_dmatable(drive);
629 /* verify good DMA status */
632 return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
635 EXPORT_SYMBOL(__ide_dma_end);
637 /* returns 1 if dma irq issued, 0 otherwise */
638 static int __ide_dma_test_irq(ide_drive_t *drive)
640 ide_hwif_t *hwif = HWIF(drive);
641 u8 dma_stat = hwif->INB(hwif->dma_status);
643 #if 0 /* do not set unless you know what you are doing */
645 u8 stat = hwif->INB(IDE_STATUS_REG);
646 hwif->OUTB(hwif->dma_status, dma_stat & 0xE4);
649 /* return 1 if INTR asserted */
650 if ((dma_stat & 4) == 4)
652 if (!drive->waiting_for_dma)
653 printk(KERN_WARNING "%s: (%s) called while not waiting\n",
654 drive->name, __FUNCTION__);
657 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
659 int __ide_dma_bad_drive (ide_drive_t *drive)
661 struct hd_driveid *id = drive->id;
663 int blacklist = ide_in_drive_list(id, drive_blacklist);
665 printk(KERN_WARNING "%s: Disabling (U)DMA for %s (blacklisted)\n",
666 drive->name, id->model);
672 EXPORT_SYMBOL(__ide_dma_bad_drive);
674 int __ide_dma_good_drive (ide_drive_t *drive)
676 struct hd_driveid *id = drive->id;
677 return ide_in_drive_list(id, drive_whitelist);
680 EXPORT_SYMBOL(__ide_dma_good_drive);
682 int ide_use_dma(ide_drive_t *drive)
684 struct hd_driveid *id = drive->id;
685 ide_hwif_t *hwif = drive->hwif;
687 /* consult the list of known "bad" drives */
688 if (__ide_dma_bad_drive(drive))
691 /* capable of UltraDMA modes */
692 if (id->field_valid & 4) {
693 if (hwif->ultra_mask & id->dma_ultra)
697 /* capable of regular DMA modes */
698 if (id->field_valid & 2) {
699 if (hwif->mwdma_mask & id->dma_mword)
701 if (hwif->swdma_mask & id->dma_1word)
705 /* consult the list of known "good" drives */
706 if (__ide_dma_good_drive(drive) && id->eide_dma_time < 150)
712 EXPORT_SYMBOL_GPL(ide_use_dma);
714 void ide_dma_verbose(ide_drive_t *drive)
716 struct hd_driveid *id = drive->id;
717 ide_hwif_t *hwif = HWIF(drive);
719 if (id->field_valid & 4) {
720 if ((id->dma_ultra >> 8) && (id->dma_mword >> 8))
722 if (id->dma_ultra & ((id->dma_ultra >> 8) & hwif->ultra_mask)) {
723 if (((id->dma_ultra >> 11) & 0x1F) &&
724 eighty_ninty_three(drive)) {
725 if ((id->dma_ultra >> 15) & 1) {
726 printk(", UDMA(mode 7)");
727 } else if ((id->dma_ultra >> 14) & 1) {
728 printk(", UDMA(133)");
729 } else if ((id->dma_ultra >> 13) & 1) {
730 printk(", UDMA(100)");
731 } else if ((id->dma_ultra >> 12) & 1) {
732 printk(", UDMA(66)");
733 } else if ((id->dma_ultra >> 11) & 1) {
734 printk(", UDMA(44)");
739 if ((id->dma_ultra >> 10) & 1) {
740 printk(", UDMA(33)");
741 } else if ((id->dma_ultra >> 9) & 1) {
742 printk(", UDMA(25)");
743 } else if ((id->dma_ultra >> 8) & 1) {
744 printk(", UDMA(16)");
748 printk(", (U)DMA"); /* Can be BIOS-enabled! */
750 } else if (id->field_valid & 2) {
751 if ((id->dma_mword >> 8) && (id->dma_1word >> 8))
754 } else if (id->field_valid & 1) {
759 printk(", BUG DMA OFF");
760 hwif->ide_dma_off_quietly(drive);
764 EXPORT_SYMBOL(ide_dma_verbose);
766 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
767 int __ide_dma_lostirq (ide_drive_t *drive)
769 printk("%s: DMA interrupt recovery\n", drive->name);
773 EXPORT_SYMBOL(__ide_dma_lostirq);
775 int __ide_dma_timeout (ide_drive_t *drive)
777 printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name);
778 if (HWIF(drive)->ide_dma_test_irq(drive))
781 return HWIF(drive)->ide_dma_end(drive);
784 EXPORT_SYMBOL(__ide_dma_timeout);
787 * Needed for allowing full modular support of ide-driver
789 static int ide_release_dma_engine(ide_hwif_t *hwif)
791 if (hwif->dmatable_cpu) {
792 pci_free_consistent(hwif->pci_dev,
793 PRD_ENTRIES * PRD_BYTES,
796 hwif->dmatable_cpu = NULL;
801 static int ide_release_iomio_dma(ide_hwif_t *hwif)
803 if ((hwif->dma_extra) && (hwif->channel == 0))
804 release_region((hwif->dma_base + 16), hwif->dma_extra);
805 release_region(hwif->dma_base, 8);
807 release_region(hwif->dma_base, 8);
812 * Needed for allowing full modular support of ide-driver
814 int ide_release_dma (ide_hwif_t *hwif)
818 if (hwif->chipset == ide_etrax100)
821 ide_release_dma_engine(hwif);
822 return ide_release_iomio_dma(hwif);
825 static int ide_allocate_dma_engine(ide_hwif_t *hwif)
827 hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev,
828 PRD_ENTRIES * PRD_BYTES,
829 &hwif->dmatable_dma);
831 if (hwif->dmatable_cpu)
834 printk(KERN_ERR "%s: -- Error, unable to allocate%s DMA table(s).\n",
835 hwif->cds->name, !hwif->dmatable_cpu ? " CPU" : "");
837 ide_release_dma_engine(hwif);
841 static int ide_mapped_mmio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int ports)
843 printk(KERN_INFO " %s: MMIO-DMA ", hwif->name);
845 hwif->dma_base = base;
846 if (hwif->cds->extra && hwif->channel == 0)
847 hwif->dma_extra = hwif->cds->extra;
850 hwif->dma_master = (hwif->channel) ? hwif->mate->dma_base : base;
852 hwif->dma_master = base;
856 static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base, unsigned int ports)
858 printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx",
859 hwif->name, base, base + ports - 1);
860 if (!request_region(base, ports, hwif->name)) {
861 printk(" -- Error, ports in use.\n");
864 hwif->dma_base = base;
865 if ((hwif->cds->extra) && (hwif->channel == 0)) {
866 request_region(base+16, hwif->cds->extra, hwif->cds->name);
867 hwif->dma_extra = hwif->cds->extra;
871 hwif->dma_master = (hwif->channel) ? hwif->mate->dma_base : base;
873 hwif->dma_master = base;
874 if (hwif->dma_base2) {
875 if (!request_region(hwif->dma_base2, ports, hwif->name))
877 printk(" -- Error, secondary ports in use.\n");
878 release_region(base, ports);
885 static int ide_dma_iobase(ide_hwif_t *hwif, unsigned long base, unsigned int ports)
888 return ide_mapped_mmio_dma(hwif, base,ports);
889 BUG_ON(hwif->mmio == 1);
890 return ide_iomio_dma(hwif, base, ports);
894 * This can be called for a dynamically installed interface. Don't __init it
896 void ide_setup_dma (ide_hwif_t *hwif, unsigned long dma_base, unsigned int num_ports)
898 if (ide_dma_iobase(hwif, dma_base, num_ports))
901 if (ide_allocate_dma_engine(hwif)) {
902 ide_release_dma(hwif);
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);
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;
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");
950 if (!(hwif->dma_master))
954 EXPORT_SYMBOL_GPL(ide_setup_dma);
955 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */