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| author | Eric Huang <[email protected]> | 2021-02-27 22:46:44 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2021-03-24 03:00:46 +0000 |
| commit | 2e2f197f4c994cf60ccd43a55b202bd0c5d679ba (patch) | |
| tree | 1dcb4318275ffd012c4b8bcdf9f47a4716bc0c60 /drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | |
| parent | drm/amdgpu: set CPU mapping of vram as cached for A+A mode (diff) | |
| download | kernel-2e2f197f4c994cf60ccd43a55b202bd0c5d679ba.tar.gz kernel-2e2f197f4c994cf60ccd43a55b202bd0c5d679ba.zip | |
drm/amdgpu: set snoop bit in pde/pte entries for A+A
Page tables in vram mapping to cpu is changed from uncached to
cached in A+A, the snoop bit in VM_CONTEXTx_PAGE_TABLE_BASE_ADDR/
PDE0s/PDE1s/PDE2s/PTE.TFs has to be set so gpuvm walker snoop
page table data out of CPU cache.
Signed-off-by: Eric Huang <[email protected]>
Reviewed-by: Christian König <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index c5fea144b759..feed820091f6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1432,6 +1432,10 @@ uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_resource *mem) flags |= AMDGPU_PTE_SNOOPED; } + if (mem && mem->mem_type == TTM_PL_VRAM && + mem->bus.caching == ttm_cached) + flags |= AMDGPU_PTE_SNOOPED; + return flags; } |