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ide: add IDE_HFLAG_SERIALIZE_DMA host flag 

* Add IDE_HFLAG_SERIALIZE_DMA host flag to serialize ports
  if DMA is available and handle it in ide_init_port().

* Convert sl82c105 host driver to use this new flag.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-04-26 22:25:24 +02:00
parent 6c61064162
commit 1fd1890594
3 changed files with 9 additions and 5 deletions
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5
drivers/ide/ide-probe.c
View File

@ -1367,8 +1367,11 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
hwif->port_ops = d->port_ops;
if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate)
if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) {
if (hwif->mate)
hwif->mate->serialized = hwif->serialized = 1;
}
hwif->swdma_mask = d->swdma_mask;
hwif->mwdma_mask = d->mwdma_mask;

5
drivers/ide/pci/sl82c105.c
View File

@ -296,9 +296,6 @@ static void __devinit init_hwif_sl82c105(ide_hwif_t *hwif)
hwif->dma_start = &sl82c105_dma_start;
hwif->ide_dma_end = &sl82c105_dma_end;
hwif->dma_timeout = &sl82c105_dma_timeout;
if (hwif->mate)
hwif->serialized = hwif->mate->serialized = 1;
}
static const struct ide_port_ops sl82c105_port_ops = {
@ -319,6 +316,7 @@ static const struct ide_port_info sl82c105_chipset __devinitdata = {
#if defined(CONFIG_LOPEC) || defined(CONFIG_SANDPOINT)
IDE_HFLAG_FORCE_LEGACY_IRQS |
#endif
IDE_HFLAG_SERIALIZE_DMA |
IDE_HFLAG_NO_AUTODMA,
.pio_mask = ATA_PIO5,
.mwdma_mask = ATA_MWDMA2,
@ -338,6 +336,7 @@ static int __devinit sl82c105_init_one(struct pci_dev *dev, const struct pci_dev
"revision %d, BM-DMA disabled\n", rev);
d.init_hwif = NULL;
d.mwdma_mask = 0;
d.host_flags &= ~IDE_HFLAG_SERIALIZE_DMA;
}
return ide_setup_pci_device(dev, &d);

2
include/linux/ide.h
View File

@ -1087,6 +1087,8 @@ enum {
/* unmask IRQs */
IDE_HFLAG_UNMASK_IRQS = (1 << 25),
IDE_HFLAG_ABUSE_SET_DMA_MODE = (1 << 26),
/* serialize ports if DMA is possible (for sl82c105) */
IDE_HFLAG_SERIALIZE_DMA = (1 << 27),
/* force host out of "simplex" mode */
IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
/* DSC overlap is unsupported */