[RFC PATCH 22/28] drm/xe: Add BO flags required for SVM

[Matthew Brost]

Add XE_BO_FLAG_SYSTEM_ALLOC to indicate BO is tied to SVM range.

Add XE_BO_FLAG_SKIP_CLEAR to indicate BO does not need to cleared.

Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
 drivers/gpu/drm/xe/xe_bo.c | 11 +++++++----
 drivers/gpu/drm/xe/xe_bo.h |  2 ++
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index b6c6a4a3b4d4..ad804b6f9e84 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -704,9 +704,10 @@ static int xe_bo_move(struct ttm_buffer_object *ttm_bo, bool evict,
 						(!mem_type_is_vram(old_mem_type) && !tt_has_data);
 
 	clear_system_pages = ttm && (ttm->page_flags & TTM_TT_FLAG_CLEARED_ON_FREE);
-	needs_clear = (ttm && ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC) ||
+	needs_clear = !(bo->flags & XE_BO_FLAG_SKIP_CLEAR) &&
+		((ttm && ttm->page_flags & TTM_TT_FLAG_ZERO_ALLOC) ||
 		(!ttm && ttm_bo->type == ttm_bo_type_device) ||
-		clear_system_pages;
+		clear_system_pages);
 
 	if (new_mem->mem_type == XE_PL_TT) {
 		ret = xe_tt_map_sg(ttm);
@@ -1284,7 +1285,8 @@ struct xe_bo *___xe_bo_create_locked(struct xe_device *xe, struct xe_bo *bo,
 	int err;
 
 	/* Only kernel objects should set GT */
-	xe_assert(xe, !tile || type == ttm_bo_type_kernel);
+	xe_assert(xe, !tile || type == ttm_bo_type_kernel ||
+		  flags & XE_BO_FLAG_SYSTEM_ALLOC);
 
 	if (XE_WARN_ON(!size)) {
 		xe_bo_free(bo);
@@ -2292,7 +2294,8 @@ bool xe_bo_needs_ccs_pages(struct xe_bo *bo)
 	 * can't be used since there's no CCS storage associated with
 	 * non-VRAM addresses.
 	 */
-	if (IS_DGFX(xe) && (bo->flags & XE_BO_FLAG_SYSTEM))
+	if (IS_DGFX(xe) && ((bo->flags & XE_BO_FLAG_SYSTEM) ||
+	    (bo->flags & XE_BO_FLAG_SYSTEM_ALLOC)))
 		return false;
 
 	return true;
diff --git a/drivers/gpu/drm/xe/xe_bo.h b/drivers/gpu/drm/xe/xe_bo.h
index dbfb3209615d..fe2ce641b256 100644
--- a/drivers/gpu/drm/xe/xe_bo.h
+++ b/drivers/gpu/drm/xe/xe_bo.h
@@ -39,6 +39,8 @@
 #define XE_BO_FLAG_NEEDS_64K		BIT(15)
 #define XE_BO_FLAG_NEEDS_2M		BIT(16)
 #define XE_BO_FLAG_GGTT_INVALIDATE	BIT(17)
+#define XE_BO_FLAG_SYSTEM_ALLOC		BIT(18)
+#define XE_BO_FLAG_SKIP_CLEAR		BIT(19)
 /* this one is trigger internally only */
 #define XE_BO_FLAG_INTERNAL_TEST	BIT(30)
 #define XE_BO_FLAG_INTERNAL_64K		BIT(31)
-- 
2.34.1