2 * Copyright (C) 1995-1998 Mark Lord
3 * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
4 * Copyright (C) 2004, 2007 Bartlomiej Zolnierkiewicz
6 * May be copied or modified under the terms of the GNU General Public License
10 * Special Thanks to Mark for his Six years of work.
14 * This module provides support for the bus-master IDE DMA functions
15 * of various PCI chipsets, including the Intel PIIX (i82371FB for
16 * the 430 FX chipset), the PIIX3 (i82371SB for the 430 HX/VX and
17 * 440 chipsets), and the PIIX4 (i82371AB for the 430 TX chipset)
18 * ("PIIX" stands for "PCI ISA IDE Xcellerator").
20 * Pretty much the same code works for other IDE PCI bus-mastering chipsets.
22 * DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies).
24 * By default, DMA support is prepared for use, but is currently enabled only
25 * for drives which already have DMA enabled (UltraDMA or mode 2 multi/single),
26 * or which are recognized as "good" (see table below). Drives with only mode0
27 * or mode1 (multi/single) DMA should also work with this chipset/driver
28 * (eg. MC2112A) but are not enabled by default.
30 * Use "hdparm -i" to view modes supported by a given drive.
32 * The hdparm-3.5 (or later) utility can be used for manually enabling/disabling
33 * DMA support, but must be (re-)compiled against this kernel version or later.
35 * To enable DMA, use "hdparm -d1 /dev/hd?" on a per-drive basis after booting.
36 * If problems arise, ide.c will disable DMA operation after a few retries.
37 * This error recovery mechanism works and has been extremely well exercised.
39 * IDE drives, depending on their vintage, may support several different modes
40 * of DMA operation. The boot-time modes are indicated with a "*" in
41 * the "hdparm -i" listing, and can be changed with *knowledgeable* use of
42 * the "hdparm -X" feature. There is seldom a need to do this, as drives
43 * normally power-up with their "best" PIO/DMA modes enabled.
45 * Testing has been done with a rather extensive number of drives,
46 * with Quantum & Western Digital models generally outperforming the pack,
47 * and Fujitsu & Conner (and some Seagate which are really Conner) drives
48 * showing more lackluster throughput.
50 * Keep an eye on /var/adm/messages for "DMA disabled" messages.
52 * Some people have reported trouble with Intel Zappa motherboards.
53 * This can be fixed by upgrading the AMI BIOS to version 1.00.04.BS0,
54 * available from ftp://ftp.intel.com/pub/bios/10004bs0.exe
55 * (thanks to Glen Morrell <glen@spin.Stanford.edu> for researching this).
57 * Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for
58 * fixing the problem with the BIOS on some Acer motherboards.
60 * Thanks to "Benoit Poulot-Cazajous" <poulot@chorus.fr> for testing
61 * "TX" chipset compatibility and for providing patches for the "TX" chipset.
63 * Thanks to Christian Brunner <chb@muc.de> for taking a good first crack
64 * at generic DMA -- his patches were referred to when preparing this code.
66 * Most importantly, thanks to Robert Bringman <rob@mars.trion.com>
67 * for supplying a Promise UDMA board & WD UDMA drive for this work!
69 * And, yes, Intel Zappa boards really *do* use both PIIX IDE ports.
71 * ATA-66/100 and recovery functions, I forgot the rest......
75 #include <linux/module.h>
76 #include <linux/types.h>
77 #include <linux/kernel.h>
78 #include <linux/timer.h>
80 #include <linux/interrupt.h>
81 #include <linux/pci.h>
82 #include <linux/init.h>
83 #include <linux/ide.h>
84 #include <linux/delay.h>
85 #include <linux/scatterlist.h>
86 #include <linux/dma-mapping.h>
91 static const struct drive_list_entry drive_whitelist [] = {
93 { "Micropolis 2112A" , NULL },
94 { "CONNER CTMA 4000" , NULL },
95 { "CONNER CTT8000-A" , NULL },
96 { "ST34342A" , NULL },
100 static const struct drive_list_entry drive_blacklist [] = {
102 { "WDC AC11000H" , NULL },
103 { "WDC AC22100H" , NULL },
104 { "WDC AC32500H" , NULL },
105 { "WDC AC33100H" , NULL },
106 { "WDC AC31600H" , NULL },
107 { "WDC AC32100H" , "24.09P07" },
108 { "WDC AC23200L" , "21.10N21" },
109 { "Compaq CRD-8241B" , NULL },
110 { "CRD-8400B" , NULL },
111 { "CRD-8480B", NULL },
112 { "CRD-8482B", NULL },
114 { "SanDisk SDP3B" , NULL },
115 { "SanDisk SDP3B-64" , NULL },
116 { "SANYO CD-ROM CRD" , NULL },
117 { "HITACHI CDR-8" , NULL },
118 { "HITACHI CDR-8335" , NULL },
119 { "HITACHI CDR-8435" , NULL },
120 { "Toshiba CD-ROM XM-6202B" , NULL },
121 { "TOSHIBA CD-ROM XM-1702BC", NULL },
122 { "CD-532E-A" , NULL },
123 { "E-IDE CD-ROM CR-840", NULL },
124 { "CD-ROM Drive/F5A", NULL },
125 { "WPI CDD-820", NULL },
126 { "SAMSUNG CD-ROM SC-148C", NULL },
127 { "SAMSUNG CD-ROM SC", NULL },
128 { "ATAPI CD-ROM DRIVE 40X MAXIMUM", NULL },
129 { "_NEC DV5800A", NULL },
130 { "SAMSUNG CD-ROM SN-124", "N001" },
131 { "Seagate STT20000A", NULL },
132 { "CD-ROM CDR_U200", "1.09" },
138 * ide_dma_intr - IDE DMA interrupt handler
139 * @drive: the drive the interrupt is for
141 * Handle an interrupt completing a read/write DMA transfer on an
145 ide_startstop_t ide_dma_intr (ide_drive_t *drive)
147 u8 stat = 0, dma_stat = 0;
149 dma_stat = HWIF(drive)->ide_dma_end(drive);
150 stat = ide_read_status(drive);
152 if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) {
154 struct request *rq = HWGROUP(drive)->rq;
156 task_end_request(drive, rq, stat);
159 printk(KERN_ERR "%s: dma_intr: bad DMA status (dma_stat=%x)\n",
160 drive->name, dma_stat);
162 return ide_error(drive, "dma_intr", stat);
165 EXPORT_SYMBOL_GPL(ide_dma_intr);
167 static int ide_dma_good_drive(ide_drive_t *drive)
169 return ide_in_drive_list(drive->id, drive_whitelist);
173 * ide_build_sglist - map IDE scatter gather for DMA I/O
174 * @drive: the drive to build the DMA table for
175 * @rq: the request holding the sg list
177 * Perform the DMA mapping magic necessary to access the source or
178 * target buffers of a request via DMA. The lower layers of the
179 * kernel provide the necessary cache management so that we can
180 * operate in a portable fashion.
183 int ide_build_sglist(ide_drive_t *drive, struct request *rq)
185 ide_hwif_t *hwif = HWIF(drive);
186 struct scatterlist *sg = hwif->sg_table;
188 ide_map_sg(drive, rq);
190 if (rq_data_dir(rq) == READ)
191 hwif->sg_dma_direction = DMA_FROM_DEVICE;
193 hwif->sg_dma_direction = DMA_TO_DEVICE;
195 return dma_map_sg(hwif->dev, sg, hwif->sg_nents,
196 hwif->sg_dma_direction);
199 EXPORT_SYMBOL_GPL(ide_build_sglist);
201 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
203 * ide_build_dmatable - build IDE DMA table
205 * ide_build_dmatable() prepares a dma request. We map the command
206 * to get the pci bus addresses of the buffers and then build up
207 * the PRD table that the IDE layer wants to be fed. The code
208 * knows about the 64K wrap bug in the CS5530.
210 * Returns the number of built PRD entries if all went okay,
211 * returns 0 otherwise.
213 * May also be invoked from trm290.c
216 int ide_build_dmatable (ide_drive_t *drive, struct request *rq)
218 ide_hwif_t *hwif = HWIF(drive);
219 unsigned int *table = hwif->dmatable_cpu;
220 unsigned int is_trm290 = (hwif->chipset == ide_trm290) ? 1 : 0;
221 unsigned int count = 0;
223 struct scatterlist *sg;
225 hwif->sg_nents = i = ide_build_sglist(drive, rq);
235 cur_addr = sg_dma_address(sg);
236 cur_len = sg_dma_len(sg);
239 * Fill in the dma table, without crossing any 64kB boundaries.
240 * Most hardware requires 16-bit alignment of all blocks,
241 * but the trm290 requires 32-bit alignment.
245 if (count++ >= PRD_ENTRIES) {
246 printk(KERN_ERR "%s: DMA table too small\n", drive->name);
247 goto use_pio_instead;
249 u32 xcount, bcount = 0x10000 - (cur_addr & 0xffff);
251 if (bcount > cur_len)
253 *table++ = cpu_to_le32(cur_addr);
254 xcount = bcount & 0xffff;
256 xcount = ((xcount >> 2) - 1) << 16;
257 if (xcount == 0x0000) {
259 * Most chipsets correctly interpret a length of 0x0000 as 64KB,
260 * but at least one (e.g. CS5530) misinterprets it as zero (!).
261 * So here we break the 64KB entry into two 32KB entries instead.
263 if (count++ >= PRD_ENTRIES) {
264 printk(KERN_ERR "%s: DMA table too small\n", drive->name);
265 goto use_pio_instead;
267 *table++ = cpu_to_le32(0x8000);
268 *table++ = cpu_to_le32(cur_addr + 0x8000);
271 *table++ = cpu_to_le32(xcount);
283 *--table |= cpu_to_le32(0x80000000);
287 printk(KERN_ERR "%s: empty DMA table?\n", drive->name);
290 ide_destroy_dmatable(drive);
292 return 0; /* revert to PIO for this request */
295 EXPORT_SYMBOL_GPL(ide_build_dmatable);
299 * ide_destroy_dmatable - clean up DMA mapping
300 * @drive: The drive to unmap
302 * Teardown mappings after DMA has completed. This must be called
303 * after the completion of each use of ide_build_dmatable and before
304 * the next use of ide_build_dmatable. Failure to do so will cause
305 * an oops as only one mapping can be live for each target at a given
309 void ide_destroy_dmatable (ide_drive_t *drive)
311 ide_hwif_t *hwif = drive->hwif;
313 dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->sg_nents,
314 hwif->sg_dma_direction);
317 EXPORT_SYMBOL_GPL(ide_destroy_dmatable);
319 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
321 * config_drive_for_dma - attempt to activate IDE DMA
322 * @drive: the drive to place in DMA mode
324 * If the drive supports at least mode 2 DMA or UDMA of any kind
325 * then attempt to place it into DMA mode. Drives that are known to
326 * support DMA but predate the DMA properties or that are known
327 * to have DMA handling bugs are also set up appropriately based
328 * on the good/bad drive lists.
331 static int config_drive_for_dma (ide_drive_t *drive)
333 ide_hwif_t *hwif = drive->hwif;
334 struct hd_driveid *id = drive->id;
336 if (drive->media != ide_disk) {
337 if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA)
342 * Enable DMA on any drive that has
343 * UltraDMA (mode 0/1/2/3/4/5/6) enabled
345 if ((id->field_valid & 4) && ((id->dma_ultra >> 8) & 0x7f))
349 * Enable DMA on any drive that has mode2 DMA
350 * (multi or single) enabled
352 if (id->field_valid & 2) /* regular DMA */
353 if ((id->dma_mword & 0x404) == 0x404 ||
354 (id->dma_1word & 0x404) == 0x404)
357 /* Consult the list of known "good" drives */
358 if (ide_dma_good_drive(drive))
365 * dma_timer_expiry - handle a DMA timeout
366 * @drive: Drive that timed out
368 * An IDE DMA transfer timed out. In the event of an error we ask
369 * the driver to resolve the problem, if a DMA transfer is still
370 * in progress we continue to wait (arguably we need to add a
371 * secondary 'I don't care what the drive thinks' timeout here)
372 * Finally if we have an interrupt we let it complete the I/O.
373 * But only one time - we clear expiry and if it's still not
374 * completed after WAIT_CMD, we error and retry in PIO.
375 * This can occur if an interrupt is lost or due to hang or bugs.
378 static int dma_timer_expiry (ide_drive_t *drive)
380 ide_hwif_t *hwif = HWIF(drive);
381 u8 dma_stat = hwif->INB(hwif->dma_status);
383 printk(KERN_WARNING "%s: dma_timer_expiry: dma status == 0x%02x\n",
384 drive->name, dma_stat);
386 if ((dma_stat & 0x18) == 0x18) /* BUSY Stupid Early Timer !! */
389 HWGROUP(drive)->expiry = NULL; /* one free ride for now */
391 /* 1 dmaing, 2 error, 4 intr */
392 if (dma_stat & 2) /* ERROR */
395 if (dma_stat & 1) /* DMAing */
398 if (dma_stat & 4) /* Got an Interrupt */
401 return 0; /* Status is unknown -- reset the bus */
405 * ide_dma_host_set - Enable/disable DMA on a host
406 * @drive: drive to control
408 * Enable/disable DMA on an IDE controller following generic
409 * bus-mastering IDE controller behaviour.
412 void ide_dma_host_set(ide_drive_t *drive, int on)
414 ide_hwif_t *hwif = HWIF(drive);
415 u8 unit = (drive->select.b.unit & 0x01);
416 u8 dma_stat = hwif->INB(hwif->dma_status);
419 dma_stat |= (1 << (5 + unit));
421 dma_stat &= ~(1 << (5 + unit));
423 hwif->OUTB(dma_stat, hwif->dma_status);
426 EXPORT_SYMBOL_GPL(ide_dma_host_set);
427 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
430 * ide_dma_off_quietly - Generic DMA kill
431 * @drive: drive to control
433 * Turn off the current DMA on this IDE controller.
436 void ide_dma_off_quietly(ide_drive_t *drive)
438 drive->using_dma = 0;
439 ide_toggle_bounce(drive, 0);
441 drive->hwif->dma_host_set(drive, 0);
444 EXPORT_SYMBOL(ide_dma_off_quietly);
447 * ide_dma_off - disable DMA on a device
448 * @drive: drive to disable DMA on
450 * Disable IDE DMA for a device on this IDE controller.
451 * Inform the user that DMA has been disabled.
454 void ide_dma_off(ide_drive_t *drive)
456 printk(KERN_INFO "%s: DMA disabled\n", drive->name);
457 ide_dma_off_quietly(drive);
460 EXPORT_SYMBOL(ide_dma_off);
463 * ide_dma_on - Enable DMA on a device
464 * @drive: drive to enable DMA on
466 * Enable IDE DMA for a device on this IDE controller.
469 void ide_dma_on(ide_drive_t *drive)
471 drive->using_dma = 1;
472 ide_toggle_bounce(drive, 1);
474 drive->hwif->dma_host_set(drive, 1);
477 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
479 * ide_dma_setup - begin a DMA phase
480 * @drive: target device
482 * Build an IDE DMA PRD (IDE speak for scatter gather table)
483 * and then set up the DMA transfer registers for a device
484 * that follows generic IDE PCI DMA behaviour. Controllers can
485 * override this function if they need to
487 * Returns 0 on success. If a PIO fallback is required then 1
491 int ide_dma_setup(ide_drive_t *drive)
493 ide_hwif_t *hwif = drive->hwif;
494 struct request *rq = HWGROUP(drive)->rq;
495 unsigned int reading;
503 /* fall back to pio! */
504 if (!ide_build_dmatable(drive, rq)) {
505 ide_map_sg(drive, rq);
511 writel(hwif->dmatable_dma, (void __iomem *)hwif->dma_prdtable);
513 outl(hwif->dmatable_dma, hwif->dma_prdtable);
516 hwif->OUTB(reading, hwif->dma_command);
518 /* read dma_status for INTR & ERROR flags */
519 dma_stat = hwif->INB(hwif->dma_status);
521 /* clear INTR & ERROR flags */
522 hwif->OUTB(dma_stat|6, hwif->dma_status);
523 drive->waiting_for_dma = 1;
527 EXPORT_SYMBOL_GPL(ide_dma_setup);
529 static void ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
531 /* issue cmd to drive */
532 ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry);
535 void ide_dma_start(ide_drive_t *drive)
537 ide_hwif_t *hwif = HWIF(drive);
538 u8 dma_cmd = hwif->INB(hwif->dma_command);
540 /* Note that this is done *after* the cmd has
541 * been issued to the drive, as per the BM-IDE spec.
542 * The Promise Ultra33 doesn't work correctly when
543 * we do this part before issuing the drive cmd.
546 hwif->OUTB(dma_cmd|1, hwif->dma_command);
551 EXPORT_SYMBOL_GPL(ide_dma_start);
553 /* returns 1 on error, 0 otherwise */
554 int __ide_dma_end (ide_drive_t *drive)
556 ide_hwif_t *hwif = HWIF(drive);
557 u8 dma_stat = 0, dma_cmd = 0;
559 drive->waiting_for_dma = 0;
560 /* get dma_command mode */
561 dma_cmd = hwif->INB(hwif->dma_command);
563 hwif->OUTB(dma_cmd&~1, hwif->dma_command);
565 dma_stat = hwif->INB(hwif->dma_status);
566 /* clear the INTR & ERROR bits */
567 hwif->OUTB(dma_stat|6, hwif->dma_status);
568 /* purge DMA mappings */
569 ide_destroy_dmatable(drive);
570 /* verify good DMA status */
573 return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
576 EXPORT_SYMBOL(__ide_dma_end);
578 /* returns 1 if dma irq issued, 0 otherwise */
579 static int __ide_dma_test_irq(ide_drive_t *drive)
581 ide_hwif_t *hwif = HWIF(drive);
582 u8 dma_stat = hwif->INB(hwif->dma_status);
584 /* return 1 if INTR asserted */
585 if ((dma_stat & 4) == 4)
587 if (!drive->waiting_for_dma)
588 printk(KERN_WARNING "%s: (%s) called while not waiting\n",
589 drive->name, __FUNCTION__);
593 static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }
594 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
596 int __ide_dma_bad_drive (ide_drive_t *drive)
598 struct hd_driveid *id = drive->id;
600 int blacklist = ide_in_drive_list(id, drive_blacklist);
602 printk(KERN_WARNING "%s: Disabling (U)DMA for %s (blacklisted)\n",
603 drive->name, id->model);
609 EXPORT_SYMBOL(__ide_dma_bad_drive);
611 static const u8 xfer_mode_bases[] = {
617 static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode)
619 struct hd_driveid *id = drive->id;
620 ide_hwif_t *hwif = drive->hwif;
621 unsigned int mask = 0;
625 if ((id->field_valid & 4) == 0)
628 if (hwif->udma_filter)
629 mask = hwif->udma_filter(drive);
631 mask = hwif->ultra_mask;
632 mask &= id->dma_ultra;
635 * avoid false cable warning from eighty_ninty_three()
637 if (req_mode > XFER_UDMA_2) {
638 if ((mask & 0x78) && (eighty_ninty_three(drive) == 0))
643 if ((id->field_valid & 2) == 0)
645 if (hwif->mdma_filter)
646 mask = hwif->mdma_filter(drive);
648 mask = hwif->mwdma_mask;
649 mask &= id->dma_mword;
652 if (id->field_valid & 2) {
653 mask = id->dma_1word & hwif->swdma_mask;
654 } else if (id->tDMA) {
656 * ide_fix_driveid() doesn't convert ->tDMA to the
657 * CPU endianness so we need to do it here
659 u8 mode = le16_to_cpu(id->tDMA);
662 * if the mode is valid convert it to the mask
663 * (the maximum allowed mode is XFER_SW_DMA_2)
666 mask = ((2 << mode) - 1) & hwif->swdma_mask;
678 * ide_find_dma_mode - compute DMA speed
680 * @req_mode: requested mode
682 * Checks the drive/host capabilities and finds the speed to use for
683 * the DMA transfer. The speed is then limited by the requested mode.
685 * Returns 0 if the drive/host combination is incapable of DMA transfers
686 * or if the requested mode is not a DMA mode.
689 u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode)
691 ide_hwif_t *hwif = drive->hwif;
696 if (drive->media != ide_disk) {
697 if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA)
701 for (i = 0; i < ARRAY_SIZE(xfer_mode_bases); i++) {
702 if (req_mode < xfer_mode_bases[i])
704 mask = ide_get_mode_mask(drive, xfer_mode_bases[i], req_mode);
707 mode = xfer_mode_bases[i] + x;
712 if (hwif->chipset == ide_acorn && mode == 0) {
716 if (ide_dma_good_drive(drive) && drive->id->eide_dma_time < 150)
717 mode = XFER_MW_DMA_1;
720 mode = min(mode, req_mode);
722 printk(KERN_INFO "%s: %s mode selected\n", drive->name,
723 mode ? ide_xfer_verbose(mode) : "no DMA");
728 EXPORT_SYMBOL_GPL(ide_find_dma_mode);
730 static int ide_tune_dma(ide_drive_t *drive)
732 ide_hwif_t *hwif = drive->hwif;
735 if (noautodma || drive->nodma || (drive->id->capability & 1) == 0)
738 /* consult the list of known "bad" drives */
739 if (__ide_dma_bad_drive(drive))
742 if (ide_id_dma_bug(drive))
745 if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
746 return config_drive_for_dma(drive);
748 speed = ide_max_dma_mode(drive);
751 /* is this really correct/needed? */
752 if ((hwif->host_flags & IDE_HFLAG_CY82C693) &&
753 ide_dma_good_drive(drive))
759 if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
762 if (ide_set_dma_mode(drive, speed))
768 static int ide_dma_check(ide_drive_t *drive)
770 ide_hwif_t *hwif = drive->hwif;
771 int vdma = (hwif->host_flags & IDE_HFLAG_VDMA)? 1 : 0;
773 if (!vdma && ide_tune_dma(drive))
776 /* TODO: always do PIO fallback */
777 if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
780 ide_set_max_pio(drive);
782 return vdma ? 0 : -1;
785 int ide_id_dma_bug(ide_drive_t *drive)
787 struct hd_driveid *id = drive->id;
789 if (id->field_valid & 4) {
790 if ((id->dma_ultra >> 8) && (id->dma_mword >> 8))
792 } else if (id->field_valid & 2) {
793 if ((id->dma_mword >> 8) && (id->dma_1word >> 8))
798 printk(KERN_ERR "%s: bad DMA info in identify block\n", drive->name);
802 int ide_set_dma(ide_drive_t *drive)
807 * Force DMAing for the beginning of the check.
808 * Some chipsets appear to do interesting
809 * things, if not checked and cleared.
812 ide_dma_off_quietly(drive);
814 rc = ide_dma_check(drive);
823 void ide_check_dma_crc(ide_drive_t *drive)
827 ide_dma_off_quietly(drive);
828 drive->crc_count = 0;
829 mode = drive->current_speed;
831 * Don't try non Ultra-DMA modes without iCRC's. Force the
832 * device to PIO and make the user enable SWDMA/MWDMA modes.
834 if (mode > XFER_UDMA_0 && mode <= XFER_UDMA_7)
838 ide_set_xfer_rate(drive, mode);
839 if (drive->current_speed >= XFER_SW_DMA_0)
843 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
844 void ide_dma_lost_irq (ide_drive_t *drive)
846 printk("%s: DMA interrupt recovery\n", drive->name);
849 EXPORT_SYMBOL(ide_dma_lost_irq);
851 void ide_dma_timeout (ide_drive_t *drive)
853 ide_hwif_t *hwif = HWIF(drive);
855 printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name);
857 if (hwif->ide_dma_test_irq(drive))
860 hwif->ide_dma_end(drive);
863 EXPORT_SYMBOL(ide_dma_timeout);
865 static void ide_release_dma_engine(ide_hwif_t *hwif)
867 if (hwif->dmatable_cpu) {
868 struct pci_dev *pdev = to_pci_dev(hwif->dev);
870 pci_free_consistent(pdev, PRD_ENTRIES * PRD_BYTES,
871 hwif->dmatable_cpu, hwif->dmatable_dma);
872 hwif->dmatable_cpu = NULL;
876 static int ide_release_iomio_dma(ide_hwif_t *hwif)
878 release_region(hwif->dma_base, 8);
879 if (hwif->extra_ports)
880 release_region(hwif->extra_base, hwif->extra_ports);
885 * Needed for allowing full modular support of ide-driver
887 int ide_release_dma(ide_hwif_t *hwif)
889 ide_release_dma_engine(hwif);
894 return ide_release_iomio_dma(hwif);
897 static int ide_allocate_dma_engine(ide_hwif_t *hwif)
899 struct pci_dev *pdev = to_pci_dev(hwif->dev);
901 hwif->dmatable_cpu = pci_alloc_consistent(pdev,
902 PRD_ENTRIES * PRD_BYTES,
903 &hwif->dmatable_dma);
905 if (hwif->dmatable_cpu)
908 printk(KERN_ERR "%s: -- Error, unable to allocate DMA table.\n",
914 static int ide_mapped_mmio_dma(ide_hwif_t *hwif, unsigned long base)
916 printk(KERN_INFO " %s: MMIO-DMA ", hwif->name);
921 static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base)
923 printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx",
924 hwif->name, base, base + 7);
926 if (!request_region(base, 8, hwif->name)) {
927 printk(" -- Error, ports in use.\n");
931 if (hwif->cds->extra) {
932 hwif->extra_base = base + (hwif->channel ? 8 : 16);
934 if (!hwif->mate || !hwif->mate->extra_ports) {
935 if (!request_region(hwif->extra_base,
936 hwif->cds->extra, hwif->cds->name)) {
937 printk(" -- Error, extra ports in use.\n");
938 release_region(base, 8);
941 hwif->extra_ports = hwif->cds->extra;
948 static int ide_dma_iobase(ide_hwif_t *hwif, unsigned long base)
951 return ide_mapped_mmio_dma(hwif, base);
953 return ide_iomio_dma(hwif, base);
956 void ide_setup_dma(ide_hwif_t *hwif, unsigned long base)
960 if (ide_dma_iobase(hwif, base))
963 if (ide_allocate_dma_engine(hwif)) {
964 ide_release_dma(hwif);
968 hwif->dma_base = base;
970 if (!hwif->dma_command)
971 hwif->dma_command = hwif->dma_base + 0;
972 if (!hwif->dma_vendor1)
973 hwif->dma_vendor1 = hwif->dma_base + 1;
974 if (!hwif->dma_status)
975 hwif->dma_status = hwif->dma_base + 2;
976 if (!hwif->dma_vendor3)
977 hwif->dma_vendor3 = hwif->dma_base + 3;
978 if (!hwif->dma_prdtable)
979 hwif->dma_prdtable = hwif->dma_base + 4;
981 if (!hwif->dma_host_set)
982 hwif->dma_host_set = &ide_dma_host_set;
983 if (!hwif->dma_setup)
984 hwif->dma_setup = &ide_dma_setup;
985 if (!hwif->dma_exec_cmd)
986 hwif->dma_exec_cmd = &ide_dma_exec_cmd;
987 if (!hwif->dma_start)
988 hwif->dma_start = &ide_dma_start;
989 if (!hwif->ide_dma_end)
990 hwif->ide_dma_end = &__ide_dma_end;
991 if (!hwif->ide_dma_test_irq)
992 hwif->ide_dma_test_irq = &__ide_dma_test_irq;
993 if (!hwif->dma_timeout)
994 hwif->dma_timeout = &ide_dma_timeout;
995 if (!hwif->dma_lost_irq)
996 hwif->dma_lost_irq = &ide_dma_lost_irq;
998 dma_stat = hwif->INB(hwif->dma_status);
999 printk(KERN_CONT ", BIOS settings: %s:%s, %s:%s\n",
1000 hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "PIO",
1001 hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "PIO");
1004 EXPORT_SYMBOL_GPL(ide_setup_dma);
1005 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */