drm/xe: Make usable size of VRAM readable

Current size member of vram struct does not give
complete information as what "size" contains. Does
it contain reserved portions or not. Name it usable
size and accordingly describe other size members as
well.

Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

6 files changed, 18 insertions, 10 deletions

diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index 17c0c6c2ae65..86947a6fcc7c 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -125,7 +125,7 @@ static void add_vram(struct xe_device *xe, struct xe_bo *bo,
 {
 	struct xe_tile *tile = mem_type_to_tile(xe, mem_type);
 
-	XE_BUG_ON(!tile->mem.vram.size);
+	XE_BUG_ON(!tile->mem.vram.usable_size);
 
 	places[*c] = (struct ttm_place) {
 		.mem_type = mem_type,
diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index c404d250e453..db08d64abce1 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -122,11 +122,18 @@ struct xe_tile {
 			resource_size_t io_size;
 			/** @base: offset of VRAM starting base */
 			resource_size_t base;
-			/** @size: size of VRAM. */
-			resource_size_t size;
+			/**
+			 * @usable_size: usable size of VRAM
+			 *
+			 * Usable size of VRAM excluding reserved portions
+			 * (e.g stolen mem)
+			 */
+			resource_size_t usable_size;
 			/**
 			 * @actual_physical_size: Actual VRAM size
-			 * including stolen mem for tile
+			 *
+			 * Actual VRAM size including reserved portions
+			 * (e.g stolen mem)
 			 */
 			resource_size_t actual_physical_size;
 			/** @mapping: pointer to VRAM mappable space */
diff --git a/drivers/gpu/drm/xe/xe_mmio.c b/drivers/gpu/drm/xe/xe_mmio.c
index 7d92258cd35d..5effb21db9d4 100644
--- a/drivers/gpu/drm/xe/xe_mmio.c
+++ b/drivers/gpu/drm/xe/xe_mmio.c
@@ -289,13 +289,13 @@ int xe_mmio_probe_vram(struct xe_device *xe)
 		tile->mem.vram.base = tile_offset;
 
 		/* small bar can limit the visible size.  size accordingly */
-		tile->mem.vram.size = min_t(u64, vram_size, io_size);
+		tile->mem.vram.usable_size = min_t(u64, vram_size, io_size);
 		tile->mem.vram.mapping = xe->mem.vram.mapping + tile_offset;
 
 		drm_info(&xe->drm, "VRAM[%u, %u]: %pa, %pa\n", id, tile->id,
-			 &tile->mem.vram.io_start, &tile->mem.vram.size);
+			 &tile->mem.vram.io_start, &tile->mem.vram.usable_size);
 
-		if (tile->mem.vram.io_size < tile->mem.vram.size)
+		if (tile->mem.vram.io_size < tile->mem.vram.usable_size)
 			drm_info(&xe->drm, "VRAM[%u, %u]: CPU access limited to %pa\n", id,
 				 tile->id, &tile->mem.vram.io_size);
 
diff --git a/drivers/gpu/drm/xe/xe_query.c b/drivers/gpu/drm/xe/xe_query.c
index 15e171ca7e62..9acbb27dfcab 100644
--- a/drivers/gpu/drm/xe/xe_query.c
+++ b/drivers/gpu/drm/xe/xe_query.c
@@ -188,7 +188,7 @@ static int query_config(struct xe_device *xe, struct drm_xe_device_query *query)
 	config->num_params = num_params;
 	config->info[XE_QUERY_CONFIG_REV_AND_DEVICE_ID] =
 		xe->info.devid | (xe->info.revid << 16);
-	if (xe_device_get_root_tile(xe)->mem.vram.size)
+	if (xe_device_get_root_tile(xe)->mem.vram.usable_size)
 		config->info[XE_QUERY_CONFIG_FLAGS] =
 			XE_QUERY_CONFIG_FLAGS_HAS_VRAM;
 	if (xe->info.enable_guc)
diff --git a/drivers/gpu/drm/xe/xe_tile.c b/drivers/gpu/drm/xe/xe_tile.c
index ac70486d09c3..e0bc2b60ab09 100644
--- a/drivers/gpu/drm/xe/xe_tile.c
+++ b/drivers/gpu/drm/xe/xe_tile.c
@@ -101,7 +101,7 @@ static int tile_ttm_mgr_init(struct xe_tile *tile)
 	struct xe_device *xe = tile_to_xe(tile);
 	int err;
 
-	if (tile->mem.vram.size) {
+	if (tile->mem.vram.usable_size) {
 		err = xe_ttm_vram_mgr_init(tile, tile->mem.vram_mgr);
 		if (err)
 			return err;
diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
index 1a84abd35fcf..a10fd0366da3 100644
--- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
+++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
@@ -360,7 +360,8 @@ int xe_ttm_vram_mgr_init(struct xe_tile *tile, struct xe_ttm_vram_mgr *mgr)
 	mgr->tile = tile;
 
 	return __xe_ttm_vram_mgr_init(xe, mgr, XE_PL_VRAM0 + tile->id,
-				      tile->mem.vram.size, tile->mem.vram.io_size,
+				      tile->mem.vram.usable_size,
+				      tile->mem.vram.io_size,
 				      PAGE_SIZE);
 }