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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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16
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@@ -2756,7 +2756,21 @@ void amdgpu_vm_update_fault_cache(struct amdgpu_device *adev,
if (vm) {
vm->fault_info.addr = addr;
vm->fault_info.status = status;
vm->fault_info.vmhub = vmhub;
if (AMDGPU_IS_GFXHUB(vmhub)) {
vm->fault_info.vmhub = AMDGPU_VMHUB_TYPE_GFX;
vm->fault_info.vmhub |=
(vmhub - AMDGPU_GFXHUB_START) << AMDGPU_VMHUB_IDX_SHIFT;
} else if (AMDGPU_IS_MMHUB0(vmhub)) {
vm->fault_info.vmhub = AMDGPU_VMHUB_TYPE_MM0;
vm->fault_info.vmhub |=
(vmhub - AMDGPU_MMHUB0_START) << AMDGPU_VMHUB_IDX_SHIFT;
} else if (AMDGPU_IS_MMHUB1(vmhub)) {
vm->fault_info.vmhub = AMDGPU_VMHUB_TYPE_MM1;
vm->fault_info.vmhub |=
(vmhub - AMDGPU_MMHUB1_START) << AMDGPU_VMHUB_IDX_SHIFT;
} else {
WARN_ONCE(1, "Invalid vmhub %u\n", vmhub);
}
}
xa_unlock_irqrestore(&adev->vm_manager.pasids, flags);
}