Commit 0ae006dc authored by Himal Prasad Ghimiray's avatar Himal Prasad Ghimiray
Browse files

drm/xe/svm: Extend MAP range to reduce vma fragmentation 



When DRM_XE_VM_BIND_FLAG_CPU_ADDR_MIRROR is set during VM_BIND_OP_MAP,
the mapping logic now checks adjacent cpu_addr_mirror VMAs with default
attributes and expands the mapping range accordingly. This ensures that
bo_unmap operations ideally target the same area and helps reduce
fragmentation by coalescing nearby compatible VMAs into a single mapping.

Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: default avatarMatthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251125075628.1182481-4-himal.prasad.ghimiray@intel.com


Signed-off-by: default avatarHimal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
parent 4a938d38

drivers/gpu/drm/xe/xe_vm.c

+7 −2
Original line number Diff line number Diff line
@@ -2233,6 +2233,7 @@ vm_bind_ioctl_ops_create(struct xe_vm *vm, struct xe_vma_ops *vops, 
	struct drm_gpuva_ops *ops;

	struct drm_gpuva_op *__op;

	struct drm_gpuvm_bo *vm_bo;

	u64 range_start = addr;

	u64 range_end = addr + range;

	int err;
@@ -2245,10 +2246,14 @@ vm_bind_ioctl_ops_create(struct xe_vm *vm, struct xe_vma_ops *vops, 


	switch (operation) {

	case DRM_XE_VM_BIND_OP_MAP:

		if (flags & DRM_XE_VM_BIND_FLAG_CPU_ADDR_MIRROR)

			xe_vm_find_cpu_addr_mirror_vma_range(vm, &range_start, &range_end);



		fallthrough;

	case DRM_XE_VM_BIND_OP_MAP_USERPTR: {

		struct drm_gpuvm_map_req map_req = {

			.map.va.addr = addr,

			.map.va.range = range,

			.map.va.addr = range_start,

			.map.va.range = range_end - range_start,

			.map.gem.obj = obj,

			.map.gem.offset = bo_offset_or_userptr,

		};