drm/amdgpu/virt: add wait_reset virt ops

Driver can use this interface to check if there's a function level
reset done in hypervisor. It's helpful when IRQ handler for reset
is not ready, or special handling is required.

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: pding <Pixel.Ding@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 18 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index 0f227cf7a67c..b7510bf6bc0f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -236,6 +236,22 @@ int amdgpu_virt_reset_gpu(struct amdgpu_device *adev)
 }
 
 /**
+ * amdgpu_virt_wait_reset() - wait for reset gpu completed
+ * @amdgpu:     amdgpu device.
+ * Wait for GPU reset completed.
+ * Return: Zero if reset success, otherwise will return error.
+ */
+int amdgpu_virt_wait_reset(struct amdgpu_device *adev)
+{
+        struct amdgpu_virt *virt = &adev->virt;
+
+        if (!virt->ops || !virt->ops->wait_reset)
+                return -EINVAL;
+
+        return virt->ops->wait_reset(adev);
+}
+
+/**
  * amdgpu_virt_alloc_mm_table() - alloc memory for mm table
  * @amdgpu:     amdgpu device.
  * MM table is used by UVD and VCE for its initialization
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index 81efb9d291c4..d149aca71a44 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -55,6 +55,7 @@ struct amdgpu_virt_ops {
         int (*req_full_gpu)(struct amdgpu_device *adev, bool init);
         int (*rel_full_gpu)(struct amdgpu_device *adev, bool init);
         int (*reset_gpu)(struct amdgpu_device *adev);
+        int (*wait_reset)(struct amdgpu_device *adev);
         void (*trans_msg)(struct amdgpu_device *adev, u32 req, u32 data1, u32 data2, u32 data3);
 };
 
@@ -286,6 +287,7 @@ void amdgpu_virt_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v);
 int amdgpu_virt_request_full_gpu(struct amdgpu_device *adev, bool init);
 int amdgpu_virt_release_full_gpu(struct amdgpu_device *adev, bool init);
 int amdgpu_virt_reset_gpu(struct amdgpu_device *adev);
+int amdgpu_virt_wait_reset(struct amdgpu_device *adev);
 int amdgpu_sriov_gpu_reset(struct amdgpu_device *adev, struct amdgpu_job *job);
 int amdgpu_virt_alloc_mm_table(struct amdgpu_device *adev);
 void amdgpu_virt_free_mm_table(struct amdgpu_device *adev);