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-rw-r--r--windhoek/ide/ide-dma.c507
1 files changed, 0 insertions, 507 deletions
diff --git a/windhoek/ide/ide-dma.c b/windhoek/ide/ide-dma.c
deleted file mode 100644
index 059c90bb..00000000
--- a/windhoek/ide/ide-dma.c
+++ /dev/null
@@ -1,507 +0,0 @@
-/*
- * IDE DMA support (including IDE PCI BM-DMA).
- *
- * Copyright (C) 1995-1998 Mark Lord
- * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
- * Copyright (C) 2004, 2007 Bartlomiej Zolnierkiewicz
- *
- * May be copied or modified under the terms of the GNU General Public License
- *
- * DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies).
- */
-
-/*
- * Special Thanks to Mark for his Six years of work.
- */
-
-/*
- * Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for
- * fixing the problem with the BIOS on some Acer motherboards.
- *
- * Thanks to "Benoit Poulot-Cazajous" <poulot@chorus.fr> for testing
- * "TX" chipset compatibility and for providing patches for the "TX" chipset.
- *
- * Thanks to Christian Brunner <chb@muc.de> for taking a good first crack
- * at generic DMA -- his patches were referred to when preparing this code.
- *
- * Most importantly, thanks to Robert Bringman <rob@mars.trion.com>
- * for supplying a Promise UDMA board & WD UDMA drive for this work!
- */
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/ide.h>
-#include <linux/scatterlist.h>
-#include <linux/dma-mapping.h>
-
-static const struct drive_list_entry drive_whitelist[] = {
- { "Micropolis 2112A" , NULL },
- { "CONNER CTMA 4000" , NULL },
- { "CONNER CTT8000-A" , NULL },
- { "ST34342A" , NULL },
- { NULL , NULL }
-};
-
-static const struct drive_list_entry drive_blacklist[] = {
- { "WDC AC11000H" , NULL },
- { "WDC AC22100H" , NULL },
- { "WDC AC32500H" , NULL },
- { "WDC AC33100H" , NULL },
- { "WDC AC31600H" , NULL },
- { "WDC AC32100H" , "24.09P07" },
- { "WDC AC23200L" , "21.10N21" },
- { "Compaq CRD-8241B" , NULL },
- { "CRD-8400B" , NULL },
- { "CRD-8480B", NULL },
- { "CRD-8482B", NULL },
- { "CRD-84" , NULL },
- { "SanDisk SDP3B" , NULL },
- { "SanDisk SDP3B-64" , NULL },
- { "SANYO CD-ROM CRD" , NULL },
- { "HITACHI CDR-8" , NULL },
- { "HITACHI CDR-8335" , NULL },
- { "HITACHI CDR-8435" , NULL },
- { "Toshiba CD-ROM XM-6202B" , NULL },
- { "TOSHIBA CD-ROM XM-1702BC", NULL },
- { "CD-532E-A" , NULL },
- { "E-IDE CD-ROM CR-840", NULL },
- { "CD-ROM Drive/F5A", NULL },
- { "WPI CDD-820", NULL },
- { "SAMSUNG CD-ROM SC-148C", NULL },
- { "SAMSUNG CD-ROM SC", NULL },
- { "ATAPI CD-ROM DRIVE 40X MAXIMUM", NULL },
- { "_NEC DV5800A", NULL },
- { "SAMSUNG CD-ROM SN-124", "N001" },
- { "Seagate STT20000A", NULL },
- { "CD-ROM CDR_U200", "1.09" },
- { NULL , NULL }
-
-};
-
-/**
- * ide_dma_intr - IDE DMA interrupt handler
- * @drive: the drive the interrupt is for
- *
- * Handle an interrupt completing a read/write DMA transfer on an
- * IDE device
- */
-
-ide_startstop_t ide_dma_intr(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
- u8 stat = 0, dma_stat = 0;
-
- dma_stat = hwif->dma_ops->dma_end(drive);
- stat = hwif->tp_ops->read_status(hwif);
-
- if (OK_STAT(stat, DRIVE_READY, drive->bad_wstat | ATA_DRQ)) {
- if (!dma_stat) {
- struct request *rq = hwif->rq;
-
- task_end_request(drive, rq, stat);
- return ide_stopped;
- }
- printk(KERN_ERR "%s: %s: bad DMA status (0x%02x)\n",
- drive->name, __func__, dma_stat);
- }
- return ide_error(drive, "dma_intr", stat);
-}
-EXPORT_SYMBOL_GPL(ide_dma_intr);
-
-int ide_dma_good_drive(ide_drive_t *drive)
-{
- return ide_in_drive_list(drive->id, drive_whitelist);
-}
-
-/**
- * ide_build_sglist - map IDE scatter gather for DMA I/O
- * @drive: the drive to build the DMA table for
- * @rq: the request holding the sg list
- *
- * Perform the DMA mapping magic necessary to access the source or
- * target buffers of a request via DMA. The lower layers of the
- * kernel provide the necessary cache management so that we can
- * operate in a portable fashion.
- */
-
-int ide_build_sglist(ide_drive_t *drive, struct request *rq)
-{
- ide_hwif_t *hwif = drive->hwif;
- struct scatterlist *sg = hwif->sg_table;
- int i;
-
- ide_map_sg(drive, rq);
-
- if (rq_data_dir(rq) == READ)
- hwif->sg_dma_direction = DMA_FROM_DEVICE;
- else
- hwif->sg_dma_direction = DMA_TO_DEVICE;
-
- i = dma_map_sg(hwif->dev, sg, hwif->sg_nents, hwif->sg_dma_direction);
- if (i) {
- hwif->orig_sg_nents = hwif->sg_nents;
- hwif->sg_nents = i;
- }
-
- return i;
-}
-EXPORT_SYMBOL_GPL(ide_build_sglist);
-
-/**
- * ide_destroy_dmatable - clean up DMA mapping
- * @drive: The drive to unmap
- *
- * Teardown mappings after DMA has completed. This must be called
- * after the completion of each use of ide_build_dmatable and before
- * the next use of ide_build_dmatable. Failure to do so will cause
- * an oops as only one mapping can be live for each target at a given
- * time.
- */
-
-void ide_destroy_dmatable(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
-
- dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->orig_sg_nents,
- hwif->sg_dma_direction);
-}
-EXPORT_SYMBOL_GPL(ide_destroy_dmatable);
-
-/**
- * ide_dma_off_quietly - Generic DMA kill
- * @drive: drive to control
- *
- * Turn off the current DMA on this IDE controller.
- */
-
-void ide_dma_off_quietly(ide_drive_t *drive)
-{
- drive->dev_flags &= ~IDE_DFLAG_USING_DMA;
- ide_toggle_bounce(drive, 0);
-
- drive->hwif->dma_ops->dma_host_set(drive, 0);
-}
-EXPORT_SYMBOL(ide_dma_off_quietly);
-
-/**
- * ide_dma_off - disable DMA on a device
- * @drive: drive to disable DMA on
- *
- * Disable IDE DMA for a device on this IDE controller.
- * Inform the user that DMA has been disabled.
- */
-
-void ide_dma_off(ide_drive_t *drive)
-{
- printk(KERN_INFO "%s: DMA disabled\n", drive->name);
- ide_dma_off_quietly(drive);
-}
-EXPORT_SYMBOL(ide_dma_off);
-
-/**
- * ide_dma_on - Enable DMA on a device
- * @drive: drive to enable DMA on
- *
- * Enable IDE DMA for a device on this IDE controller.
- */
-
-void ide_dma_on(ide_drive_t *drive)
-{
- drive->dev_flags |= IDE_DFLAG_USING_DMA;
- ide_toggle_bounce(drive, 1);
-
- drive->hwif->dma_ops->dma_host_set(drive, 1);
-}
-
-int __ide_dma_bad_drive(ide_drive_t *drive)
-{
- u16 *id = drive->id;
-
- int blacklist = ide_in_drive_list(id, drive_blacklist);
- if (blacklist) {
- printk(KERN_WARNING "%s: Disabling (U)DMA for %s (blacklisted)\n",
- drive->name, (char *)&id[ATA_ID_PROD]);
- return blacklist;
- }
- return 0;
-}
-EXPORT_SYMBOL(__ide_dma_bad_drive);
-
-static const u8 xfer_mode_bases[] = {
- XFER_UDMA_0,
- XFER_MW_DMA_0,
- XFER_SW_DMA_0,
-};
-
-static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode)
-{
- u16 *id = drive->id;
- ide_hwif_t *hwif = drive->hwif;
- const struct ide_port_ops *port_ops = hwif->port_ops;
- unsigned int mask = 0;
-
- switch (base) {
- case XFER_UDMA_0:
- if ((id[ATA_ID_FIELD_VALID] & 4) == 0)
- break;
-
- if (port_ops && port_ops->udma_filter)
- mask = port_ops->udma_filter(drive);
- else
- mask = hwif->ultra_mask;
- mask &= id[ATA_ID_UDMA_MODES];
-
- /*
- * avoid false cable warning from eighty_ninty_three()
- */
- if (req_mode > XFER_UDMA_2) {
- if ((mask & 0x78) && (eighty_ninty_three(drive) == 0))
- mask &= 0x07;
- }
- break;
- case XFER_MW_DMA_0:
- if ((id[ATA_ID_FIELD_VALID] & 2) == 0)
- break;
- if (port_ops && port_ops->mdma_filter)
- mask = port_ops->mdma_filter(drive);
- else
- mask = hwif->mwdma_mask;
- mask &= id[ATA_ID_MWDMA_MODES];
- break;
- case XFER_SW_DMA_0:
- if (id[ATA_ID_FIELD_VALID] & 2) {
- mask = id[ATA_ID_SWDMA_MODES] & hwif->swdma_mask;
- } else if (id[ATA_ID_OLD_DMA_MODES] >> 8) {
- u8 mode = id[ATA_ID_OLD_DMA_MODES] >> 8;
-
- /*
- * if the mode is valid convert it to the mask
- * (the maximum allowed mode is XFER_SW_DMA_2)
- */
- if (mode <= 2)
- mask = ((2 << mode) - 1) & hwif->swdma_mask;
- }
- break;
- default:
- BUG();
- break;
- }
-
- return mask;
-}
-
-/**
- * ide_find_dma_mode - compute DMA speed
- * @drive: IDE device
- * @req_mode: requested mode
- *
- * Checks the drive/host capabilities and finds the speed to use for
- * the DMA transfer. The speed is then limited by the requested mode.
- *
- * Returns 0 if the drive/host combination is incapable of DMA transfers
- * or if the requested mode is not a DMA mode.
- */
-
-u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode)
-{
- ide_hwif_t *hwif = drive->hwif;
- unsigned int mask;
- int x, i;
- u8 mode = 0;
-
- if (drive->media != ide_disk) {
- if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA)
- return 0;
- }
-
- for (i = 0; i < ARRAY_SIZE(xfer_mode_bases); i++) {
- if (req_mode < xfer_mode_bases[i])
- continue;
- mask = ide_get_mode_mask(drive, xfer_mode_bases[i], req_mode);
- x = fls(mask) - 1;
- if (x >= 0) {
- mode = xfer_mode_bases[i] + x;
- break;
- }
- }
-
- if (hwif->chipset == ide_acorn && mode == 0) {
- /*
- * is this correct?
- */
- if (ide_dma_good_drive(drive) &&
- drive->id[ATA_ID_EIDE_DMA_TIME] < 150)
- mode = XFER_MW_DMA_1;
- }
-
- mode = min(mode, req_mode);
-
- printk(KERN_INFO "%s: %s mode selected\n", drive->name,
- mode ? ide_xfer_verbose(mode) : "no DMA");
-
- return mode;
-}
-EXPORT_SYMBOL_GPL(ide_find_dma_mode);
-
-static int ide_tune_dma(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
- u8 speed;
-
- if (ata_id_has_dma(drive->id) == 0 ||
- (drive->dev_flags & IDE_DFLAG_NODMA))
- return 0;
-
- /* consult the list of known "bad" drives */
- if (__ide_dma_bad_drive(drive))
- return 0;
-
- if (ide_id_dma_bug(drive))
- return 0;
-
- if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
- return config_drive_for_dma(drive);
-
- speed = ide_max_dma_mode(drive);
-
- if (!speed)
- return 0;
-
- if (ide_set_dma_mode(drive, speed))
- return 0;
-
- return 1;
-}
-
-static int ide_dma_check(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
-
- if (ide_tune_dma(drive))
- return 0;
-
- /* TODO: always do PIO fallback */
- if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
- return -1;
-
- ide_set_max_pio(drive);
-
- return -1;
-}
-
-int ide_id_dma_bug(ide_drive_t *drive)
-{
- u16 *id = drive->id;
-
- if (id[ATA_ID_FIELD_VALID] & 4) {
- if ((id[ATA_ID_UDMA_MODES] >> 8) &&
- (id[ATA_ID_MWDMA_MODES] >> 8))
- goto err_out;
- } else if (id[ATA_ID_FIELD_VALID] & 2) {
- if ((id[ATA_ID_MWDMA_MODES] >> 8) &&
- (id[ATA_ID_SWDMA_MODES] >> 8))
- goto err_out;
- }
- return 0;
-err_out:
- printk(KERN_ERR "%s: bad DMA info in identify block\n", drive->name);
- return 1;
-}
-
-int ide_set_dma(ide_drive_t *drive)
-{
- int rc;
-
- /*
- * Force DMAing for the beginning of the check.
- * Some chipsets appear to do interesting
- * things, if not checked and cleared.
- * PARANOIA!!!
- */
- ide_dma_off_quietly(drive);
-
- rc = ide_dma_check(drive);
- if (rc)
- return rc;
-
- ide_dma_on(drive);
-
- return 0;
-}
-
-void ide_check_dma_crc(ide_drive_t *drive)
-{
- u8 mode;
-
- ide_dma_off_quietly(drive);
- drive->crc_count = 0;
- mode = drive->current_speed;
- /*
- * Don't try non Ultra-DMA modes without iCRC's. Force the
- * device to PIO and make the user enable SWDMA/MWDMA modes.
- */
- if (mode > XFER_UDMA_0 && mode <= XFER_UDMA_7)
- mode--;
- else
- mode = XFER_PIO_4;
- ide_set_xfer_rate(drive, mode);
- if (drive->current_speed >= XFER_SW_DMA_0)
- ide_dma_on(drive);
-}
-
-void ide_dma_lost_irq(ide_drive_t *drive)
-{
- printk(KERN_ERR "%s: DMA interrupt recovery\n", drive->name);
-}
-EXPORT_SYMBOL_GPL(ide_dma_lost_irq);
-
-void ide_dma_timeout(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
-
- printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name);
-
- if (hwif->dma_ops->dma_test_irq(drive))
- return;
-
- ide_dump_status(drive, "DMA timeout", hwif->tp_ops->read_status(hwif));
-
- hwif->dma_ops->dma_end(drive);
-}
-EXPORT_SYMBOL_GPL(ide_dma_timeout);
-
-void ide_release_dma_engine(ide_hwif_t *hwif)
-{
- if (hwif->dmatable_cpu) {
- int prd_size = hwif->prd_max_nents * hwif->prd_ent_size;
-
- dma_free_coherent(hwif->dev, prd_size,
- hwif->dmatable_cpu, hwif->dmatable_dma);
- hwif->dmatable_cpu = NULL;
- }
-}
-EXPORT_SYMBOL_GPL(ide_release_dma_engine);
-
-int ide_allocate_dma_engine(ide_hwif_t *hwif)
-{
- int prd_size;
-
- if (hwif->prd_max_nents == 0)
- hwif->prd_max_nents = PRD_ENTRIES;
- if (hwif->prd_ent_size == 0)
- hwif->prd_ent_size = PRD_BYTES;
-
- prd_size = hwif->prd_max_nents * hwif->prd_ent_size;
-
- hwif->dmatable_cpu = dma_alloc_coherent(hwif->dev, prd_size,
- &hwif->dmatable_dma,
- GFP_ATOMIC);
- if (hwif->dmatable_cpu == NULL) {
- printk(KERN_ERR "%s: unable to allocate PRD table\n",
- hwif->name);
- return -ENOMEM;
- }
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(ide_allocate_dma_engine);
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