[PATCH v3 07/18] drm/xe: Make xe_svm_alloc_vram public

[Himal Prasad Ghimiray]

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)

Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>
---
 drivers/gpu/drm/xe/xe_svm.c | 30 ++++++++++++++++++++----------
 drivers/gpu/drm/xe/xe_svm.h | 12 ++++++++++++
 2 files changed, 32 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c
index de4eb04fc78e..d30b36763240 100644
--- a/drivers/gpu/drm/xe/xe_svm.c
+++ b/drivers/gpu/drm/xe/xe_svm.c
@@ -663,9 +663,19 @@ 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);
@@ -719,13 +729,6 @@ static int xe_svm_alloc_vram(struct xe_vm *vm, struct xe_tile *tile,
 
 	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)
@@ -1006,6 +1009,13 @@ 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 0e1f376a7471..55695097a8d1 100644
--- 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
@@ -95,6 +98,7 @@ static inline bool xe_svm_range_has_dma_mapping(struct xe_svm_range *range)
 #include <linux/interval_tree.h>
 
 struct drm_pagemap_device_addr;
+struct drm_gpusvm_ctx;
 struct xe_bo;
 struct xe_gt;
 struct xe_vm;
@@ -165,6 +169,14 @@ 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
 
-- 
2.34.1