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drm/amdgpu: Fix amdgpu_bo_move() when old_mem and new_mem are both GTT

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The UVD code relies on GTT to GTT moves in order to ensure
that its BOs don't cross 256M segments.

Fixes: bfe5e585b4 ("drm/ttm: move last binding into the drivers.")
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 21fd45e5e2628d00b478590bcc3d14d3de5d45b6)
Cc: stable@vger.kernel.org
This commit is contained in:
Timur Kristóf 2026-05-25 13:33:18 +02:00 committed by Alex Deucher
parent 8882f8897e
commit ee94a65f19
1 changed files with 18 additions and 0 deletions
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18
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
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@ -515,6 +515,15 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
if (new_mem->mem_type == TTM_PL_TT ||
new_mem->mem_type == AMDGPU_PL_PREEMPT) {
if (old_mem && (old_mem->mem_type == TTM_PL_TT ||
old_mem->mem_type == AMDGPU_PL_PREEMPT)) {
r = ttm_bo_wait_ctx(bo, ctx);
if (r)
return r;
amdgpu_ttm_backend_unbind(bo->bdev, bo->ttm);
}
r = amdgpu_ttm_backend_bind(bo->bdev, bo->ttm, new_mem);
if (r)
return r;
@ -549,6 +558,15 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
ttm_bo_assign_mem(bo, new_mem);
return 0;
}
if ((old_mem->mem_type == TTM_PL_TT ||
old_mem->mem_type == AMDGPU_PL_PREEMPT) &&
(new_mem->mem_type == TTM_PL_TT ||
new_mem->mem_type == AMDGPU_PL_PREEMPT)) {
amdgpu_bo_move_notify(bo, evict, new_mem);
ttm_resource_free(bo, &bo->resource);
ttm_bo_assign_mem(bo, new_mem);
return 0;
}
if (old_mem->mem_type == AMDGPU_PL_GDS ||
old_mem->mem_type == AMDGPU_PL_GWS ||