drm/amdgpu/mes: implement resuming all gangs

Implement resuming all gangs.
Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c

@@ -471,3 +471,28 @@ int amdgpu_mes_suspend(struct amdgpu_device *adev)
 	mutex_unlock(&adev->mes.mutex);
 	return 0;
 }
+
+int amdgpu_mes_resume(struct amdgpu_device *adev)
+{
+	struct idr *idp;
+	struct amdgpu_mes_process *process;
+	struct amdgpu_mes_gang *gang;
+	struct mes_resume_gang_input input;
+	int r, pasid;
+
+	mutex_lock(&adev->mes.mutex);
+
+	idp = &adev->mes.pasid_idr;
+
+	idr_for_each_entry(idp, process, pasid) {
+		list_for_each_entry(gang, &process->gang_list, list) {
+			r = adev->mes.funcs->resume_gang(&adev->mes, &input);
+			if (r)
+				DRM_ERROR("failed to resume pasid %d gangid %d",
+					 pasid, gang->gang_id);
+		}
+	}
+
+	mutex_unlock(&adev->mes.mutex);
+	return 0;
+}

drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h

@@ -232,5 +232,6 @@ int amdgpu_mes_add_gang(struct amdgpu_device *adev, int pasid,
 int amdgpu_mes_remove_gang(struct amdgpu_device *adev, int gang_id);
 
 int amdgpu_mes_suspend(struct amdgpu_device *adev);
+int amdgpu_mes_resume(struct amdgpu_device *adev);
 
 #endif /* __AMDGPU_MES_H__ */