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drm/radeon: flush read cache for gtt with fence on r6xx and newer GPU V3 

Cayman seems to be particularly sensitive to read cache returning
old data after bind/unbind to GTT. Flush read cache for GTT range
with each fences for all new hw. Should fix several rendering glitches.
Like

V2 flush whole address space
V3 also flush shader read cache

https://bugs.freedesktop.org/show_bug.cgi?id=40221
https://bugs.freedesktop.org/show_bug.cgi?id=38022
https://bugzilla.redhat.com/show_bug.cgi?id=738790

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jerome Glisse 2011-10-26 11:41:22 -04:00 committed by Dave Airlie
parent 8ab250d448
commit 77b1bad423
3 changed files with 20 additions and 4 deletions
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4
drivers/gpu/drm/radeon/evergreen_blit_kms.c
View File

@ -625,9 +625,9 @@ int evergreen_blit_init(struct radeon_device *rdev)
rdev->r600_blit.primitives.set_default_state = set_default_state;
rdev->r600_blit.ring_size_common = 55; /* shaders + def state */
rdev->r600_blit.ring_size_common += 10; /* fence emit for VB IB */
rdev->r600_blit.ring_size_common += 16; /* fence emit for VB IB */
rdev->r600_blit.ring_size_common += 5; /* done copy */
rdev->r600_blit.ring_size_common += 10; /* fence emit for done copy */
rdev->r600_blit.ring_size_common += 16; /* fence emit for done copy */
rdev->r600_blit.ring_size_per_loop = 74;
if (rdev->family >= CHIP_CAYMAN)

16
drivers/gpu/drm/radeon/r600.c
View File

@ -2331,6 +2331,14 @@ void r600_fence_ring_emit(struct radeon_device *rdev,
if (rdev->wb.use_event) {
u64 addr = rdev->wb.gpu_addr + R600_WB_EVENT_OFFSET +
(u64)(rdev->fence_drv.scratch_reg - rdev->scratch.reg_base);
/* flush read cache over gart */
radeon_ring_write(rdev, PACKET3(PACKET3_SURFACE_SYNC, 3));
radeon_ring_write(rdev, PACKET3_TC_ACTION_ENA |
PACKET3_VC_ACTION_ENA |
PACKET3_SH_ACTION_ENA);
radeon_ring_write(rdev, 0xFFFFFFFF);
radeon_ring_write(rdev, 0);
radeon_ring_write(rdev, 10); /* poll interval */
/* EVENT_WRITE_EOP - flush caches, send int */
radeon_ring_write(rdev, PACKET3(PACKET3_EVENT_WRITE_EOP, 4));
radeon_ring_write(rdev, EVENT_TYPE(CACHE_FLUSH_AND_INV_EVENT_TS) | EVENT_INDEX(5));
@ -2339,6 +2347,14 @@ void r600_fence_ring_emit(struct radeon_device *rdev,
radeon_ring_write(rdev, fence->seq);
radeon_ring_write(rdev, 0);
} else {
/* flush read cache over gart */
radeon_ring_write(rdev, PACKET3(PACKET3_SURFACE_SYNC, 3));
radeon_ring_write(rdev, PACKET3_TC_ACTION_ENA |
PACKET3_VC_ACTION_ENA |
PACKET3_SH_ACTION_ENA);
radeon_ring_write(rdev, 0xFFFFFFFF);
radeon_ring_write(rdev, 0);
radeon_ring_write(rdev, 10); /* poll interval */
radeon_ring_write(rdev, PACKET3(PACKET3_EVENT_WRITE, 0));
radeon_ring_write(rdev, EVENT_TYPE(CACHE_FLUSH_AND_INV_EVENT) | EVENT_INDEX(0));
/* wait for 3D idle clean */

4
drivers/gpu/drm/radeon/r600_blit_kms.c
View File

@ -503,9 +503,9 @@ int r600_blit_init(struct radeon_device *rdev)
rdev->r600_blit.primitives.set_default_state = set_default_state;
rdev->r600_blit.ring_size_common = 40; /* shaders + def state */
rdev->r600_blit.ring_size_common += 10; /* fence emit for VB IB */
rdev->r600_blit.ring_size_common += 16; /* fence emit for VB IB */
rdev->r600_blit.ring_size_common += 5; /* done copy */
rdev->r600_blit.ring_size_common += 10; /* fence emit for done copy */
rdev->r600_blit.ring_size_common += 16; /* fence emit for done copy */
rdev->r600_blit.ring_size_per_loop = 76;
/* set_render_target emits 2 extra dwords on rv6xx */