drm/amdgpu: add client id for every vm

This adds a unique id for each vm client so we can
properly track them.

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -363,6 +363,7 @@ struct amdgpu_fence_driver {
 /* some special values for the owner field */
 #define AMDGPU_FENCE_OWNER_UNDEFINED	((void*)0ul)
 #define AMDGPU_FENCE_OWNER_VM		((void*)1ul)
+#define AMDGPU_CLIENT_ID_RESERVED       2
 
 #define AMDGPU_FENCE_FLAG_64BIT         (1 << 0)
 #define AMDGPU_FENCE_FLAG_INT           (1 << 1)
@@ -885,6 +886,9 @@ struct amdgpu_vm {
 
 	/* Scheduler entity for page table updates */
 	struct amd_sched_entity	entity;
+
+	/* client id */
+	u64                     client_id;
 };
 
 struct amdgpu_vm_id {
@@ -924,6 +928,8 @@ struct amdgpu_vm_manager {
 	struct amdgpu_ring                      *vm_pte_rings[AMDGPU_MAX_RINGS];
 	unsigned				vm_pte_num_rings;
 	atomic_t				vm_pte_next_ring;
+	/* client id counter */
+	atomic64_t				client_counter;
 };
 
 void amdgpu_vm_manager_init(struct amdgpu_device *adev);

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

@@ -1386,6 +1386,7 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
 	for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
 		vm->ids[i] = NULL;
 	vm->va = RB_ROOT;
+	vm->client_id = atomic64_inc_return(&adev->vm_manager.client_counter);
 	spin_lock_init(&vm->status_lock);
 	INIT_LIST_HEAD(&vm->invalidated);
 	INIT_LIST_HEAD(&vm->cleared);
@@ -1514,6 +1515,7 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev)
 	}
 
 	atomic_set(&adev->vm_manager.vm_pte_next_ring, 0);
+	atomic64_set(&adev->vm_manager.client_counter, AMDGPU_CLIENT_ID_RESERVED);
 }
 
 /**