diff options
| author | Christian König <christian.koenig@amd.com> | 2017-03-29 11:16:05 +0200 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-04-06 13:26:45 -0400 |
| commit | 9bbdcc0fbc392e1fa6b4d1497f9d9454df70466f (patch) | |
| tree | 811bd9a195b384e934005607094158d66c130978 /drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | |
| parent | 89bb5752c054e971fd453456792cb3db3d738f75 (diff) | |
drm/amdgpu: handle CPU access for split VRAM buffers (v2)
This avoids merging them together on page fault.
v2: squash in 64-bit division fix
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 83f4930f870c..e3008d55ec77 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -529,9 +529,6 @@ static int amdgpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_ case TTM_PL_TT: break; case TTM_PL_VRAM: - if (mem->start == AMDGPU_BO_INVALID_OFFSET) - return -EINVAL; - mem->bus.offset = mem->start << PAGE_SHIFT; /* check if it's visible */ if ((mem->bus.offset + mem->bus.size) > adev->mc.visible_vram_size) @@ -549,6 +546,17 @@ static void amdgpu_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_re { } +static unsigned long amdgpu_ttm_io_mem_pfn(struct ttm_buffer_object *bo, + unsigned long page_offset) +{ + struct drm_mm_node *mm = bo->mem.mm_node; + uint64_t size = mm->size; + unsigned long offset = page_offset; + + page_offset = do_div(offset, size); + return (bo->mem.bus.base >> PAGE_SHIFT) + mm->start + page_offset; +} + /* * TTM backend functions. */ @@ -1064,7 +1072,7 @@ static struct ttm_bo_driver amdgpu_bo_driver = { .fault_reserve_notify = &amdgpu_bo_fault_reserve_notify, .io_mem_reserve = &amdgpu_ttm_io_mem_reserve, .io_mem_free = &amdgpu_ttm_io_mem_free, - .io_mem_pfn = ttm_bo_default_io_mem_pfn, + .io_mem_pfn = amdgpu_ttm_io_mem_pfn, }; int amdgpu_ttm_init(struct amdgpu_device *adev) |