drm/xe: Make xe_svm_alloc_vram public

This function will be used in prefetch too, hence make it public.

v2:
  - Add kernel-doc (Matthew Brost)
  - Rebase

v3:
 - Move CONFIG_DRM_XE_DEVMEM_MIRROR stub out to xe_svm.c (Matthew Brost)

Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://lore.kernel.org/r/20250513040228.470682-3-himal.prasad.ghimiray@intel.com
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>

diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c
index ab88b4194e574dae462f97ed9a32641f2601267d..875376bddc8866459e559820366cab411aa65569 100644 (file)
--- a/drivers/gpu/drm/xe/xe_svm.c
+++ b/drivers/gpu/drm/xe/xe_svm.c
@@ -677,9 +677,19 @@ static struct xe_vram_region *tile_to_vr(struct xe_tile *tile)
        return &tile->mem.vram;
 }
 
-static int xe_svm_alloc_vram(struct xe_vm *vm, struct xe_tile *tile,
-                            struct xe_svm_range *range,
-                            const struct drm_gpusvm_ctx *ctx)
+/**
+ * xe_svm_alloc_vram()- Allocate device memory pages for range,
+ * migrating existing data.
+ * @vm: The VM.
+ * @tile: tile to allocate vram from
+ * @range: SVM range
+ * @ctx: DRM GPU SVM context
+ *
+ * Return: 0 on success, error code on failure.
+ */
+int xe_svm_alloc_vram(struct xe_vm *vm, struct xe_tile *tile,
+                     struct xe_svm_range *range,
+                     const struct drm_gpusvm_ctx *ctx)
 {
        struct mm_struct *mm = vm->svm.gpusvm.mm;
        struct xe_vram_region *vr = tile_to_vr(tile);
@@ -733,13 +743,6 @@ unlock:
 
        return err;
 }
-#else
-static int xe_svm_alloc_vram(struct xe_vm *vm, struct xe_tile *tile,
-                            struct xe_svm_range *range,
-                            const struct drm_gpusvm_ctx *ctx)
-{
-       return -EOPNOTSUPP;
-}
 #endif
 
 static bool supports_4K_migration(struct xe_device *xe)
@@ -1025,6 +1028,13 @@ int xe_devm_add(struct xe_tile *tile, struct xe_vram_region *vr)
        return 0;
 }
 #else
+int xe_svm_alloc_vram(struct xe_vm *vm, struct xe_tile *tile,
+                     struct xe_svm_range *range,
+                     const struct drm_gpusvm_ctx *ctx)
+{
+       return -EOPNOTSUPP;
+}
+
 int xe_devm_add(struct xe_tile *tile, struct xe_vram_region *vr)
 {
        return 0;

diff --git a/drivers/gpu/drm/xe/xe_svm.h b/drivers/gpu/drm/xe/xe_svm.h
index 30fc78b85b30f792b36b978486be7c0faa03758d..36e245ec64225f1393989db5085ec4ffd55985c6 100644 (file)
--- a/drivers/gpu/drm/xe/xe_svm.h
+++ b/drivers/gpu/drm/xe/xe_svm.h
@@ -70,6 +70,9 @@ int xe_svm_bo_evict(struct xe_bo *bo);
 
 void xe_svm_range_debug(struct xe_svm_range *range, const char *operation);
 
+int xe_svm_alloc_vram(struct xe_vm *vm, struct xe_tile *tile,
+                     struct xe_svm_range *range,
+                     const struct drm_gpusvm_ctx *ctx);
 /**
  * xe_svm_range_has_dma_mapping() - SVM range has DMA mapping
  * @range: SVM range
@@ -97,6 +100,7 @@ void xe_svm_flush(struct xe_vm *vm);
 #include <linux/interval_tree.h>
 
 struct drm_pagemap_device_addr;
+struct drm_gpusvm_ctx;
 struct xe_bo;
 struct xe_gt;
 struct xe_vm;
@@ -167,6 +171,14 @@ void xe_svm_range_debug(struct xe_svm_range *range, const char *operation)
 {
 }
 
+static inline
+int xe_svm_alloc_vram(struct xe_vm *vm, struct xe_tile *tile,
+                     struct xe_svm_range *range,
+                     const struct drm_gpusvm_ctx *ctx)
+{
+       return -EOPNOTSUPP;
+}
+
 #define xe_svm_assert_in_notifier(...) do {} while (0)
 #define xe_svm_range_has_dma_mapping(...) false