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drm/radeon/kms: AGP systems need PCI bus mastering enabled

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We might not hit this yet, but when if we do any sort of writeback
we really need to enable PCI bus mastering on these systems from
what I can see.

This enables PCI BM on all radeons that require it.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2009-11-05 15:36:53 +10:00
parent fcec570b27
commit 17e15b0c71
5 changed files with 21 additions and 3 deletions
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13
drivers/gpu/drm/radeon/r100.c
View file

@ -94,6 +94,15 @@ int r100_pci_gart_init(struct radeon_device *rdev)
return radeon_gart_table_ram_alloc(rdev);
}
/* required on r1xx, r2xx, r300, r(v)350, r420/r481, rs400/rs480 */
void r100_enable_bm(struct radeon_device *rdev)
{
uint32_t tmp;
/* Enable bus mastering */
tmp = RREG32(RADEON_BUS_CNTL) & ~RADEON_BUS_MASTER_DIS;
WREG32(RADEON_BUS_CNTL, tmp);
}
int r100_pci_gart_enable(struct radeon_device *rdev)
{
uint32_t tmp;
@ -105,9 +114,6 @@ int r100_pci_gart_enable(struct radeon_device *rdev)
WREG32(RADEON_AIC_LO_ADDR, rdev->mc.gtt_location);
tmp = rdev->mc.gtt_location + rdev->mc.gtt_size - 1;
WREG32(RADEON_AIC_HI_ADDR, tmp);
/* Enable bus mastering */
tmp = RREG32(RADEON_BUS_CNTL) & ~RADEON_BUS_MASTER_DIS;
WREG32(RADEON_BUS_CNTL, tmp);
/* set PCI GART page-table base address */
WREG32(RADEON_AIC_PT_BASE, rdev->gart.table_addr);
tmp = RREG32(RADEON_AIC_CNTL) | RADEON_PCIGART_TRANSLATE_EN;
@ -3108,6 +3114,7 @@ static int r100_startup(struct radeon_device *rdev)
r100_gpu_init(rdev);
/* Initialize GART (initialize after TTM so we can allocate
* memory through TTM but finalize after TTM) */
r100_enable_bm(rdev);
if (rdev->flags & RADEON_IS_PCI) {
r = r100_pci_gart_enable(rdev);
if (r)

6
drivers/gpu/drm/radeon/r300.c
View file

@ -1193,6 +1193,12 @@ static int r300_startup(struct radeon_device *rdev)
if (r)
return r;
}
if (rdev->family == CHIP_R300 ||
rdev->family == CHIP_R350 ||
rdev->family == CHIP_RV350)
r100_enable_bm(rdev);
if (rdev->flags & RADEON_IS_PCI) {
r = r100_pci_gart_enable(rdev);
if (r)

3
drivers/gpu/drm/radeon/r420.c
View file

@ -335,6 +335,9 @@ int r420_init(struct radeon_device *rdev)
if (r) {
return r;
}
if (rdev->family == CHIP_R420)
r100_enable_bm(rdev);
if (rdev->flags & RADEON_IS_PCIE) {
r = rv370_pcie_gart_init(rdev);
if (r)

1
drivers/gpu/drm/radeon/radeon.h
View file

@ -1029,6 +1029,7 @@ extern int r100_cs_parse_packet0(struct radeon_cs_parser *p,
extern int r100_cs_packet_parse(struct radeon_cs_parser *p,
struct radeon_cs_packet *pkt,
unsigned idx);
extern void r100_enable_bm(struct radeon_device *rdev);
/* rv200,rv250,rv280 */
extern void r200_set_safe_registers(struct radeon_device *rdev);

1
drivers/gpu/drm/radeon/rs400.c
View file

@ -387,6 +387,7 @@ static int rs400_startup(struct radeon_device *rdev)
r300_clock_startup(rdev);
/* Initialize GPU configuration (# pipes, ...) */
rs400_gpu_init(rdev);
r100_enable_bm(rdev);
/* Initialize GART (initialize after TTM so we can allocate
* memory through TTM but finalize after TTM) */
r = rs400_gart_enable(rdev);