Commit c904d4e2 authored by Himal Prasad Ghimiray's avatar Himal Prasad Ghimiray
Browse files

drm/xe/svm: Add xe_svm_find_vma_start() helper 



Add helper xe_svm_find_vma_start() function to determine start of cpu
vma in input range.

Reviewed-by: default avatarMatthew Brost <matthew.brost@intel.com>
Acked-by: default avatarThomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://lore.kernel.org/r/20250513040228.470682-14-himal.prasad.ghimiray@intel.com


Signed-off-by: default avatarHimal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
parent 72fa8709

drivers/gpu/drm/xe/xe_svm.c

+22 −0
Original line number Diff line number Diff line
@@ -692,6 +692,28 @@ bool xe_svm_range_validate(struct xe_vm *vm, 
	return ret;

}



/**

 * xe_svm_find_vma_start - Find start of CPU VMA

 * @vm: xe_vm pointer

 * @start: start address

 * @end: end address

 * @vma: Pointer to struct xe_vma

 *

 *

 * This function searches for a cpu vma, within the specified

 * range [start, end] in the given VM. It adjusts the range based on the

 * xe_vma start and end addresses. If no cpu VMA is found, it returns ULONG_MAX.

 *

 * Return: The starting address of the VMA within the range,

 * or ULONG_MAX if no VMA is found

 */

u64 xe_svm_find_vma_start(struct xe_vm *vm, u64 start, u64 end, struct xe_vma *vma)

{

	return drm_gpusvm_find_vma_start(&vm->svm.gpusvm,

					 max(start, xe_vma_start(vma)),

					 min(end, xe_vma_end(vma)));

}



#if IS_ENABLED(CONFIG_DRM_XE_DEVMEM_MIRROR)

static struct xe_vram_region *tile_to_vr(struct xe_tile *tile)

{

drivers/gpu/drm/xe/xe_svm.h

+8 −0
Original line number Diff line number Diff line
@@ -89,6 +89,8 @@ bool xe_svm_range_validate(struct xe_vm *vm, 
			   struct xe_svm_range *range,

			   u8 tile_mask, bool devmem_preferred);



u64 xe_svm_find_vma_start(struct xe_vm *vm, u64 addr, u64 end,  struct xe_vma *vma);



/**

 * xe_svm_range_has_dma_mapping() - SVM range has DMA mapping

 * @range: SVM range
@@ -297,6 +299,12 @@ bool xe_svm_range_validate(struct xe_vm *vm, 
	return false;

}



static inline

u64 xe_svm_find_vma_start(struct xe_vm *vm, u64 addr, u64 end, struct xe_vma *vma)

{

	return ULONG_MAX;

}



#define xe_svm_assert_in_notifier(...) do {} while (0)

#define xe_svm_range_has_dma_mapping(...) false