1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_rtp_helpers.h b/drivers/gpu/drm/xe/xe_rtp_helpers.h
new file mode 100644
index 000000000..181b6290f
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_rtp_helpers.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef _XE_RTP_HELPERS_
+#define _XE_RTP_HELPERS_
+
+#ifndef _XE_RTP_INCLUDE_PRIVATE_HELPERS
+#error "This header is supposed to be included by xe_rtp.h only"
+#endif
+
+/*
+ * Helper macros - not to be used outside this header.
+ */
+#define _XE_ESC(...) __VA_ARGS__
+#define _XE_COUNT_ARGS(...) _XE_ESC(__XE_COUNT_ARGS(__VA_ARGS__, 5, 4, 3, 2, 1,))
+#define __XE_COUNT_ARGS(_, _5, _4, _3, _2, X_, ...) X_
+
+#define _XE_FIRST(...) _XE_ESC(__XE_FIRST(__VA_ARGS__,))
+#define __XE_FIRST(x_, ...) x_
+#define _XE_TUPLE_TAIL(...) _XE_ESC(__XE_TUPLE_TAIL(__VA_ARGS__))
+#define __XE_TUPLE_TAIL(x_, ...) (__VA_ARGS__)
+
+#define _XE_DROP_FIRST(x_, ...) __VA_ARGS__
+
+#define _XE_RTP_CONCAT(a, b) __XE_RTP_CONCAT(a, b)
+#define __XE_RTP_CONCAT(a, b) XE_RTP_ ## a ## b
+
+#define __XE_RTP_PASTE_SEP_COMMA		,
+#define __XE_RTP_PASTE_SEP_BITWISE_OR		|
+
+/*
+ * XE_RTP_PASTE_FOREACH - Paste XE_RTP_<@prefix_> on each element of the tuple
+ * @args, with the end result separated by @sep_. @sep must be one of the
+ * previously declared macros __XE_RTP_PASTE_SEP_*, or declared with such
+ * prefix.
+ *
+ * Examples:
+ *
+ * 1) XE_RTP_PASTE_FOREACH(TEST_, COMMA, (FOO, BAR))
+ *    expands to:
+ *
+ *	XE_RTP_TEST_FOO , XE_RTP_TEST_BAR
+ *
+ * 2) XE_RTP_PASTE_FOREACH(TEST2_, COMMA, (FOO))
+ *    expands to:
+ *
+ *	XE_RTP_TEST2_FOO
+ *
+ * 3) XE_RTP_PASTE_FOREACH(TEST3, BITWISE_OR, (FOO, BAR))
+ *    expands to:
+ *
+ *	XE_RTP_TEST3_FOO | XE_RTP_TEST3_BAR
+ *
+ * 4) #define __XE_RTP_PASTE_SEP_MY_SEP	BANANA
+ *    XE_RTP_PASTE_FOREACH(TEST_, MY_SEP, (FOO, BAR))
+ *    expands to:
+ *
+ *	XE_RTP_TEST_FOO BANANA XE_RTP_TEST_BAR
+ */
+#define XE_RTP_PASTE_FOREACH(prefix_, sep_, args_) _XE_ESC(_XE_RTP_CONCAT(PASTE_, _XE_COUNT_ARGS args_)(prefix_, sep_, args_))
+#define XE_RTP_PASTE_1(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_)
+#define XE_RTP_PASTE_2(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_1(prefix_, sep_, _XE_TUPLE_TAIL args_)
+#define XE_RTP_PASTE_3(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_2(prefix_, sep_, _XE_TUPLE_TAIL args_)
+#define XE_RTP_PASTE_4(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_3(prefix_, sep_, _XE_TUPLE_TAIL args_)
+
+/*
+ * XE_RTP_DROP_CAST - Drop cast to convert a compound statement to a initializer
+ *
+ * Example:
+ *
+ *	#define foo(a_)	((struct foo){ .a = a_ })
+ *	XE_RTP_DROP_CAST(foo(10))
+ *	expands to:
+ *
+ *	{ .a = 10 }
+ */
+#define XE_RTP_DROP_CAST(...) _XE_ESC(_XE_DROP_FIRST _XE_ESC __VA_ARGS__)
+
+#endif