drm/amdkfd: map svm range to GPUs

Use amdgpu_vm_bo_update_mapping to update GPU page table to map or unmap
svm range system memory pages address to GPUs.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -234,6 +234,10 @@ uint8_t amdgpu_amdkfd_get_xgmi_hops_count(struct kgd_dev *dst, struct kgd_dev *s
 	})
 
 /* GPUVM API */
+#define drm_priv_to_vm(drm_priv)					\
+	(&((struct amdgpu_fpriv *)					\
+		((struct drm_file *)(drm_priv))->driver_priv)->vm)
+
 int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct kgd_dev *kgd,
 					struct file *filp, u32 pasid,
 					void **process_info,

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

@@ -948,13 +948,6 @@ static int process_update_pds(struct amdkfd_process_info *process_info,
 	return 0;
 }
 
-static struct amdgpu_vm *drm_priv_to_vm(struct drm_file *drm_priv)
-{
-	struct amdgpu_fpriv *fpriv = drm_priv->driver_priv;
-
-	return &fpriv->vm;
-}
-
 static int init_kfd_vm(struct amdgpu_vm *vm, void **process_info,
 		       struct dma_fence **ef)
 {

drivers/gpu/drm/amd/amdkfd/kfd_svm.h

@@ -57,7 +57,9 @@ struct svm_work_list_item {
  * @update_list:link list node used to add to update_list
  * @remove_list:link list node used to add to remove list
  * @insert_list:link list node used to add to insert list
+ * @mapping:    bo_va mapping structure to create and update GPU page table
  * @npages:     number of pages
+ * @dma_addr:   dma mapping address on each GPU for system memory physical page
  * @lock:       protect prange start, last, child_list, svm_bo_list
  * @saved_flags:save/restore current PF_MEMALLOC flags
  * @flags:      flags defined as KFD_IOCTL_SVM_FLAG_*
@@ -85,7 +87,9 @@ struct svm_range {
 	struct list_head		update_list;
 	struct list_head		remove_list;
 	struct list_head		insert_list;
+	struct amdgpu_bo_va_mapping	mapping;
 	uint64_t			npages;
+	dma_addr_t			*dma_addr[MAX_GPU_INSTANCE];
 	struct mutex                    lock;
 	unsigned int                    saved_flags;
 	uint32_t			flags;