static int sgiioc4_ide_dma_setup(ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
unsigned int count = 0;
int ddir;
if (rq_data_dir(rq))
ddir = PCI_DMA_TODEVICE;
else
ddir = PCI_DMA_FROMDEVICE;
if (!(count = sgiioc4_build_dma_table(drive, rq, ddir))) {
/* try PIO instead of DMA */
ide_map_sg(drive, rq);
return 1;
}
if (rq_data_dir(rq))
/* Writes TO the IOC4 FROM Main Memory */
ddir = IOC4_DMA_READ;
else
/* Writes FROM the IOC4 TO Main Memory */
ddir = IOC4_DMA_WRITE;
sgiioc4_configure_for_dma(ddir, drive);
return 0;
}
static int
sgiioc4_ide_dma_read(ide_drive_t * drive)
{
struct request *rq = HWGROUP(drive)->rq;
unsigned int count = 0;
if (!(count = sgiioc4_build_dma_table(drive, rq, PCI_DMA_FROMDEVICE))) {
/* try PIO instead of DMA */
return 1;
}
/* Writes FROM the IOC4 TO Main Memory */
sgiioc4_configure_for_dma(IOC4_DMA_WRITE, drive);
return 0;
}
static int
sgiioc4_ide_dma_write(ide_drive_t * drive)
{
struct request *rq = HWGROUP(drive)->rq;
unsigned int count = 0;
if (!(count = sgiioc4_build_dma_table(drive, rq, PCI_DMA_TODEVICE))) {
/* try PIO instead of DMA */
return 1;
}
sgiioc4_configure_for_dma(IOC4_DMA_READ, drive);
/* Writes TO the IOC4 FROM Main Memory */
return 0;
}
