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[PARISC] Add support for Quicksilver AGPGART

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Signed-off-by: Kyle McMartin <[email protected]>
This commit is contained in:
Kyle McMartin 2006-08-24 21:33:40 -04:00 • committed by Matthew Wilcox
commit 08a6436816
6 changed files with 487 additions and 12 deletions
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35
drivers/parisc/sba_iommu.c
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@ -89,7 +89,8 @@
#define DEFAULT_DMA_HINT_REG 0
static struct sba_device *sba_list;
struct sba_device *sba_list;
EXPORT_SYMBOL_GPL(sba_list);
static unsigned long ioc_needs_fdc = 0;
@ -102,8 +103,14 @@ static unsigned long piranha_bad_128k = 0;
/* Looks nice and keeps the compiler happy */
#define SBA_DEV(d) ((struct sba_device *) (d))
#ifdef CONFIG_AGP_PARISC
#define SBA_AGP_SUPPORT
#endif /*CONFIG_AGP_PARISC*/
#ifdef SBA_AGP_SUPPORT
static int reserve_sba_gart = 1;
static int sba_reserve_agpgart = 1;
module_param(sba_reserve_agpgart, int, 1);
MODULE_PARM_DESC(sba_reserve_agpgart, "Reserve half of IO pdir as AGPGART");
#endif
#define ROUNDUP(x,y) ((x + ((y)-1)) & ~((y)-1))
@ -1300,6 +1307,10 @@ sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
WRITE_REG(ioc->ibase | 31, ioc->ioc_hpa + IOC_PCOM);
#ifdef SBA_AGP_SUPPORT
{
struct klist_iter i;
struct device *dev = NULL;
/*
** If an AGP device is present, only use half of the IOV space
** for PCI DMA. Unfortunately we can't know ahead of time
@ -1308,20 +1319,22 @@ sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
** We program the next pdir index after we stop w/ a key for
** the GART code to handshake on.
*/
device=NULL;
for (lba = sba->child; lba; lba = lba->sibling) {
klist_iter_init(&sba->dev.klist_children, &i);
while (dev = next_device(&i)) {
struct parisc_device *lba = to_parisc_device(dev);
if (IS_QUICKSILVER(lba))
break;
agp_found = 1;
}
klist_iter_exit(&sba->dev.klist_children, &i);
if (lba) {
DBG_INIT("%s: Reserving half of IOVA space for AGP GART support\n", __FUNCTION__);
if (agp_found && sba_reserve_agpgart) {
printk(KERN_INFO "%s: reserving %dMb of IOVA space for agpgart\n",
__FUNCTION__, (iova_space_size/2) >> 20);
ioc->pdir_size /= 2;
((u64 *)ioc->pdir_base)[PDIR_INDEX(iova_space_size/2)] = SBA_IOMMU_COOKIE;
} else {
DBG_INIT("%s: No GART needed - no AGP controller found\n", __FUNCTION__);
ioc->pdir_base[PDIR_INDEX(iova_space_size/2)] = SBA_AGPGART_COOKIE;
}
#endif /* 0 */
}
#endif /*SBA_AGP_SUPPORT*/
}