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drm/amdgpu: add new INFO ioctl query for the last GPU page fault

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Add a interface to query the last GPU page fault for the process.
Useful for debugging context lost errors.

v2: split vmhub representation between kernel and userspace
v3: add locking when fetching fault info in INFO IOCTL

Mesa MR: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23238
libdrm MR: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23238

Cc: samuel.pitoiset@gmail.com
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Guchun Chen <guchun.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2020-10-06 16:54:35 -04:00
parent 9cff0879ae
commit 7a41ed8b59
5 changed files with 63 additions and 5 deletions
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13
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
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@@ -124,9 +124,16 @@ struct amdgpu_mem_stats;
* layout: max 8 GFXHUB + 4 MMHUB0 + 1 MMHUB1
*/
#define AMDGPU_MAX_VMHUBS 13
#define AMDGPU_GFXHUB(x) (x)
#define AMDGPU_MMHUB0(x) (8 + x)
#define AMDGPU_MMHUB1(x) (8 + 4 + x)
#define AMDGPU_GFXHUB_START 0
#define AMDGPU_MMHUB0_START 8
#define AMDGPU_MMHUB1_START 12
#define AMDGPU_GFXHUB(x) (AMDGPU_GFXHUB_START + (x))
#define AMDGPU_MMHUB0(x) (AMDGPU_MMHUB0_START + (x))
#define AMDGPU_MMHUB1(x) (AMDGPU_MMHUB1_START + (x))
#define AMDGPU_IS_GFXHUB(x) ((x) >= AMDGPU_GFXHUB_START && (x) < AMDGPU_MMHUB0_START)
#define AMDGPU_IS_MMHUB0(x) ((x) >= AMDGPU_MMHUB0_START && (x) < AMDGPU_MMHUB1_START)
#define AMDGPU_IS_MMHUB1(x) ((x) >= AMDGPU_MMHUB1_START && (x) < AMDGPU_MAX_VMHUBS)
/* Reserve 2MB at top/bottom of address space for kernel use */
#define AMDGPU_VA_RESERVED_SIZE (2ULL << 20)