drm/xe/gsc: Introduce GSC FW

Add the basic definitions and init function. Same as HuC, GSC is only
supported on the media GT on MTL and newer platforms.
Note that the GSC requires submission resources which can't be allocated
during init (because we don't have the hwconfig yet), so it can't be
marked as loadable at the end of the init function. The allocation of
those resources will come in the patch that makes use of them to load
the FW.

v2: better comment, move num FWs define inside the enum (John)

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

1 files changed, 19 insertions, 4 deletions

diff --git a/drivers/gpu/drm/xe/xe_uc_fw.c b/drivers/gpu/drm/xe/xe_uc_fw.c
index 376fbc10c5ea..5eaf6ce0d025 100644
--- a/drivers/gpu/drm/xe/xe_uc_fw.c
+++ b/drivers/gpu/drm/xe/xe_uc_fw.c
@@ -158,11 +158,18 @@ XE_HUC_FIRMWARE_DEFS(XE_UC_MODULE_FIRMWARE,
 static struct xe_gt *
 __uc_fw_to_gt(struct xe_uc_fw *uc_fw, enum xe_uc_fw_type type)
 {
-	if (type == XE_UC_FW_TYPE_GUC)
-		return container_of(uc_fw, struct xe_gt, uc.guc.fw);
+	XE_WARN_ON(type >= XE_UC_FW_NUM_TYPES);
 
-	XE_WARN_ON(type != XE_UC_FW_TYPE_HUC);
-	return container_of(uc_fw, struct xe_gt, uc.huc.fw);
+	switch (type) {
+	case XE_UC_FW_TYPE_GUC:
+		return container_of(uc_fw, struct xe_gt, uc.guc.fw);
+	case XE_UC_FW_TYPE_HUC:
+		return container_of(uc_fw, struct xe_gt, uc.huc.fw);
+	case XE_UC_FW_TYPE_GSC:
+		return container_of(uc_fw, struct xe_gt, uc.gsc.fw);
+	default:
+		return NULL;
+	}
 }
 
 static struct xe_gt *uc_fw_to_gt(struct xe_uc_fw *uc_fw)
@@ -197,6 +204,14 @@ uc_fw_auto_select(struct xe_device *xe, struct xe_uc_fw *uc_fw)
 	u32 count;
 	int i;
 
+	/*
+	 * GSC FW support is still not fully in place, so we're not defining
+	 * the FW blob yet because we don't want the driver to attempt to load
+	 * it until we're ready for it.
+	 */
+	if (uc_fw->type == XE_UC_FW_TYPE_GSC)
+		return;
+
 	xe_assert(xe, uc_fw->type < ARRAY_SIZE(blobs_all));
 	entries = blobs_all[uc_fw->type].entries;
 	count = blobs_all[uc_fw->type].count;