[PATCH v3 1/2] drm/xe: Extract xe_bo_is_visible_vram

[Jocelyn Falempe <jfalempe@redhat.com>]

From: Maarten Lankhorst <dev@lankhorst.se>

This will make it possible to call from xe_display code.

Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
Reviewed-by: Francois Dugast <francois.dugast@intel.com>
---
 drivers/gpu/drm/xe/xe_bo.c | 19 ++++++++++++++++++-
 drivers/gpu/drm/xe/xe_bo.h |  1 +
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index 4410e28dee54..c1b9c84dd4df 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -580,6 +580,23 @@ static bool xe_ttm_resource_visible(struct ttm_resource *mem)
 	return vres->used_visible_size == mem->size;
 }
 
+/**
+ * xe_bo_is_visible_vram - check if BO is placed entirely in visible VRAM.
+ * @bo: The BO
+ *
+ * This function checks whether a given BO resides entirely in memory visible from the CPU
+ *
+ * Returns: true if the BO is entirely visible, false otherwise.
+ *
+ */
+bool xe_bo_is_visible_vram(struct xe_bo *bo)
+{
+	if (drm_WARN_ON(bo->ttm.base.dev, !xe_bo_is_vram(bo)))
+		return false;
+
+	return xe_ttm_resource_visible(bo->ttm.resource);
+}
+
 static int xe_ttm_io_mem_reserve(struct ttm_device *bdev,
 				 struct ttm_resource *mem)
 {
@@ -1605,7 +1622,7 @@ static int xe_ttm_access_memory(struct ttm_buffer_object *ttm_bo,
 	if (!mem_type_is_vram(ttm_bo->resource->mem_type))
 		return -EIO;
 
-	if (!xe_ttm_resource_visible(ttm_bo->resource) || len >= SZ_16K) {
+	if (!xe_bo_is_visible_vram(bo) || len >= SZ_16K) {
 		struct xe_migrate *migrate =
 			mem_type_to_migrate(xe, ttm_bo->resource->mem_type);
 
diff --git a/drivers/gpu/drm/xe/xe_bo.h b/drivers/gpu/drm/xe/xe_bo.h
index a77af42b5f9e..431c4d536f9c 100644
--- a/drivers/gpu/drm/xe/xe_bo.h
+++ b/drivers/gpu/drm/xe/xe_bo.h
@@ -273,6 +273,7 @@ int xe_bo_read(struct xe_bo *bo, u64 offset, void *dst, int size);
 
 bool mem_type_is_vram(u32 mem_type);
 bool xe_bo_is_vram(struct xe_bo *bo);
+bool xe_bo_is_visible_vram(struct xe_bo *bo);
 bool xe_bo_is_stolen(struct xe_bo *bo);
 bool xe_bo_is_stolen_devmem(struct xe_bo *bo);
 bool xe_bo_is_vm_bound(struct xe_bo *bo);
-- 
2.51.0