drm/xe: Use FIELD_PREP for lrc descriptor

Use FIELD_PREP for setting lrc descriptor fields instead
of shifting values to fields.

v2: Use ULL macro variants
v3: Do not use FIELD_PREP for 1-bit values
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240322191455.7613-1-niranjana.vishwanathapura@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/xe_lrc.c

@@ -26,13 +26,13 @@
 #include "xe_sriov.h"
 #include "xe_vm.h"
 
-#define LRC_VALID				(1 << 0)
-#define LRC_PRIVILEGE				(1 << 8)
-#define LRC_ADDRESSING_MODE_SHIFT		3
+#define LRC_VALID				BIT_ULL(0)
+#define LRC_PRIVILEGE				BIT_ULL(8)
+#define LRC_ADDRESSING_MODE			GENMASK_ULL(4, 3)
 #define LRC_LEGACY_64B_CONTEXT			3
 
-#define ENGINE_CLASS_SHIFT			61
-#define ENGINE_INSTANCE_SHIFT			48
+#define LRC_ENGINE_CLASS			GENMASK_ULL(63, 61)
+#define LRC_ENGINE_INSTANCE			GENMASK_ULL(53, 48)
 
 struct xe_lrc_snapshot {
 	struct xe_bo *lrc_bo;
@@ -796,7 +796,7 @@ int xe_lrc_init(struct xe_lrc *lrc, struct xe_hw_engine *hwe,
 		xe_lrc_write_ctx_reg(lrc, PVC_CTX_ASID, vm->usm.asid);
 
 	lrc->desc = LRC_VALID;
-	lrc->desc |= LRC_LEGACY_64B_CONTEXT << LRC_ADDRESSING_MODE_SHIFT;
+	lrc->desc |= FIELD_PREP(LRC_ADDRESSING_MODE, LRC_LEGACY_64B_CONTEXT);
 	/* TODO: Priority */
 
 	/* While this appears to have something about privileged batches or
@@ -806,8 +806,8 @@ int xe_lrc_init(struct xe_lrc *lrc, struct xe_hw_engine *hwe,
 		lrc->desc |= LRC_PRIVILEGE;
 
 	if (GRAPHICS_VERx100(xe) < 1250) {
-		lrc->desc |= (u64)hwe->instance << ENGINE_INSTANCE_SHIFT;
-		lrc->desc |= (u64)hwe->class << ENGINE_CLASS_SHIFT;
+		lrc->desc |= FIELD_PREP(LRC_ENGINE_INSTANCE, hwe->instance);
+		lrc->desc |= FIELD_PREP(LRC_ENGINE_CLASS, hwe->class);
 	}
 
 	arb_enable = MI_ARB_ON_OFF | MI_ARB_ENABLE;