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drm/xe/svm: Make xe_svm_range_needs_migrate_to_vram() public

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xe_svm_range_needs_migrate_to_vram() determines whether range needs
migration to vram or not, modify it to accept region preference parameter
too, so we can use it in prefetch too.

v2
- add assert instead of warn (Matthew Brost)

Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250513040228.470682-11-himal.prasad.ghimiray@intel.com
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
This commit is contained in:
Himal Prasad Ghimiray
2025-05-13 09:32:23 +05:30
parent e0ff0d7cf9
commit cc795e0410
2 changed files with 28 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/gpu/drm/xe/xe_svm.c
View File

@@ -733,22 +733,32 @@ static bool supports_4K_migration(struct xe_device *xe)
return true;
}
static bool xe_svm_range_needs_migrate_to_vram(struct xe_svm_range *range,
struct xe_vma *vma)
/**
* xe_svm_range_needs_migrate_to_vram() - SVM range needs migrate to VRAM or not
* @range: SVM range for which migration needs to be decided
* @vma: vma which has range
* @preferred_region_is_vram: preferred region for range is vram
*
* Return: True for range needing migration and migration is supported else false
*/
bool xe_svm_range_needs_migrate_to_vram(struct xe_svm_range *range, struct xe_vma *vma,
bool preferred_region_is_vram)
{
struct xe_vm *vm = range_to_vm(&range->base);
u64 range_size = xe_svm_range_size(range);
if (!range->base.flags.migrate_devmem)
if (!range->base.flags.migrate_devmem || !preferred_region_is_vram)
return false;
if (xe_svm_range_in_vram(range)) {
drm_dbg(&vm->xe->drm, "Range is already in VRAM\n");
xe_assert(vm->xe, IS_DGFX(vm->xe));
if (preferred_region_is_vram && xe_svm_range_in_vram(range)) {
drm_info(&vm->xe->drm, "Range is already in VRAM\n");
return false;
}
if (range_size <= SZ_64K && !supports_4K_migration(vm->xe)) {
drm_dbg(&vm->xe->drm, "Platform doesn't support SZ_4K range migration\n");
if (preferred_region_is_vram && range_size <= SZ_64K && !supports_4K_migration(vm->xe)) {
drm_warn(&vm->xe->drm, "Platform doesn't support SZ_4K range migration\n");
return false;
}
@@ -817,7 +827,7 @@ int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma,
range_debug(range, "PAGE FAULT");
if (--migrate_try_count >= 0 &&
xe_svm_range_needs_migrate_to_vram(range, vma)) {
xe_svm_range_needs_migrate_to_vram(range, vma, IS_DGFX(vm->xe))) {
err = xe_svm_alloc_vram(vm, tile, range, &ctx);
ctx.timeslice_ms <<= 1; /* Double timeslice if we have to retry */
if (err) {

10
drivers/gpu/drm/xe/xe_svm.h
View File

@@ -80,6 +80,9 @@ struct xe_svm_range *xe_svm_range_find_or_insert(struct xe_vm *vm, u64 addr,
int xe_svm_range_get_pages(struct xe_vm *vm, struct xe_svm_range *range,
struct drm_gpusvm_ctx *ctx);
bool xe_svm_range_needs_migrate_to_vram(struct xe_svm_range *range, struct xe_vma *vma,
bool preferred_region_is_vram);
/**
* xe_svm_range_has_dma_mapping() - SVM range has DMA mapping
* @range: SVM range
@@ -268,6 +271,13 @@ static inline unsigned long xe_svm_range_size(struct xe_svm_range *range)
return 0;
}
static inline
bool xe_svm_range_needs_migrate_to_vram(struct xe_svm_range *range, struct xe_vma *vma,
u32 region)
{
return false;
}
#define xe_svm_assert_in_notifier(...) do {} while (0)
#define xe_svm_range_has_dma_mapping(...) false