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drm/radeon/kms: sync across multiple rings when doing bo moves v3 

We need to synchronize across rings when doing a bo move to make
sure we the buffer is idle if it's in use by a different ring than
the ring doing the move.

v2: fix fence setup for bo moves

v3: add missing ring lock/unlock

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2012-01-05 22:11:07 -05:00 committed by Dave Airlie
parent 93504fce28
commit 3000bf3933
3 changed files with 39 additions and 4 deletions
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2
drivers/gpu/drm/radeon/radeon.h
View File

@ -1489,6 +1489,8 @@ struct radeon_device {
unsigned debugfs_count;
/* virtual memory */
struct radeon_vm_manager vm_manager;
/* ring used for bo copies */
u32 copy_ring;
};
int radeon_device_init(struct radeon_device *rdev,

3
drivers/gpu/drm/radeon/radeon_asic.c
View File

@ -1036,6 +1036,9 @@ int radeon_asic_init(struct radeon_device *rdev)
else
rdev->num_crtc = 2;
/* set the ring used for bo copies */
rdev->copy_ring = RADEON_RING_TYPE_GFX_INDEX;
switch (rdev->family) {
case CHIP_R100:
case CHIP_RV100:

38
drivers/gpu/drm/radeon/radeon_ttm.c
View File

@ -223,10 +223,10 @@ static int radeon_move_blit(struct ttm_buffer_object *bo,
struct radeon_device *rdev;
uint64_t old_start, new_start;
struct radeon_fence *fence;
int r;
int r, i;
rdev = radeon_get_rdev(bo->bdev);
r = radeon_fence_create(rdev, &fence, RADEON_RING_TYPE_GFX_INDEX);
r = radeon_fence_create(rdev, &fence, rdev->copy_ring);
if (unlikely(r)) {
return r;
}
@ -255,13 +255,43 @@ static int radeon_move_blit(struct ttm_buffer_object *bo,
DRM_ERROR("Unknown placement %d\n", old_mem->mem_type);
return -EINVAL;
}
if (!rdev->ring[RADEON_RING_TYPE_GFX_INDEX].ready) {
DRM_ERROR("Trying to move memory with CP turned off.\n");
if (!rdev->ring[rdev->copy_ring].ready) {
DRM_ERROR("Trying to move memory with ring turned off.\n");
return -EINVAL;
}
BUILD_BUG_ON((PAGE_SIZE % RADEON_GPU_PAGE_SIZE) != 0);
/* sync other rings */
if (rdev->family >= CHIP_R600) {
for (i = 0; i < RADEON_NUM_RINGS; ++i) {
/* no need to sync to our own or unused rings */
if (i == rdev->copy_ring || !rdev->ring[i].ready)
continue;
if (!fence->semaphore) {
r = radeon_semaphore_create(rdev, &fence->semaphore);
/* FIXME: handle semaphore error */
if (r)
continue;
}
r = radeon_ring_lock(rdev, &rdev->ring[i], 3);
/* FIXME: handle ring lock error */
if (r)
continue;
radeon_semaphore_emit_signal(rdev, i, fence->semaphore);
radeon_ring_unlock_commit(rdev, &rdev->ring[i]);
r = radeon_ring_lock(rdev, &rdev->ring[rdev->copy_ring], 3);
/* FIXME: handle ring lock error */
if (r)
continue;
radeon_semaphore_emit_wait(rdev, rdev->copy_ring, fence->semaphore);
radeon_ring_unlock_commit(rdev, &rdev->ring[rdev->copy_ring]);
}
}
r = radeon_copy(rdev, old_start, new_start,
new_mem->num_pages * (PAGE_SIZE / RADEON_GPU_PAGE_SIZE), /* GPU pages */
fence);