drm/amdgpu: add need_reset_on_init asic callback (v2)

Used to determine if we need to reset the asic on init due
to the driver having been previously loaded or not shutdown
cleanly.  E.g., kexec or VM passthrough.

v2: rebase

Reviewed-by: Evan Quan <[email protected]>
Reviewed-by: Felix Kuehling <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 3b30bb2cdd21..88431ea88344 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -545,6 +545,8 @@ struct amdgpu_asic_funcs {
 	/* PCIe bandwidth usage */
 	void (*get_pcie_usage)(struct amdgpu_device *adev, uint64_t *count0,
 			       uint64_t *count1);
+	/* do we need to reset the asic at init time (e.g., kexec) */
+	bool (*need_reset_on_init)(struct amdgpu_device *adev);
 };
 
 /*
@@ -1046,6 +1048,7 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
 #define amdgpu_asic_need_full_reset(adev) (adev)->asic_funcs->need_full_reset((adev))
 #define amdgpu_asic_init_doorbell_index(adev) (adev)->asic_funcs->init_doorbell_index((adev))
 #define amdgpu_asic_get_pcie_usage(adev, cnt0, cnt1) ((adev)->asic_funcs->get_pcie_usage((adev), (cnt0), (cnt1)))
+#define amdgpu_asic_need_reset_on_init(adev) (adev)->asic_funcs->need_reset_on_init((adev))
 
 /* Common functions */
 bool amdgpu_device_should_recover_gpu(struct amdgpu_device *adev);