1 files changed, 212 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_gen_wa_oob.c b/drivers/gpu/drm/xe/xe_gen_wa_oob.c
new file mode 100644
index 000000000000..247e41c1c48d
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_gen_wa_oob.c
@@ -0,0 +1,212 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#define _GNU_SOURCE
+#include <ctype.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#define HEADER \
+	"// SPDX-License-Identifier: MIT\n" \
+	"\n" \
+	"/*\n" \
+	" * DO NOT MODIFY.\n" \
+	" *\n" \
+	" * This file was generated from rules: %s\n" \
+	" */\n" \
+	"#ifndef _GENERATED_%s_\n" \
+	"#define _GENERATED_%s_\n" \
+	"\n" \
+	"enum {\n"
+
+#define FOOTER \
+	"};\n" \
+	"\n" \
+	"#endif\n"
+
+static void print_usage(FILE *f, const char *progname)
+{
+	fprintf(f, "usage: %s <input-rule-file> <generated-c-source-file> <generated-c-header-file>\n",
+		progname);
+}
+
+static void print_parse_error(const char *err_msg, const char *line,
+			      unsigned int lineno)
+{
+	fprintf(stderr, "ERROR: %s\nERROR: %u: %.60s\n",
+		err_msg, lineno, line);
+}
+
+static char *strip(char *line, size_t linelen)
+{
+	while (isspace(*(line + linelen)))
+		linelen--;
+
+	line[linelen - 1] = '\0';
+
+	return  line + strspn(line, " \f\n\r\t\v");
+}
+
+#define MAX_LINE_LEN 4096
+static int parse(FILE *input, FILE *csource, FILE *cheader, char *prefix)
+{
+	char line[MAX_LINE_LEN + 1];
+	char *name, *prev_name = NULL, *rules;
+	unsigned int lineno = 0, idx = 0;
+
+	while (fgets(line, sizeof(line), input)) {
+		size_t linelen;
+		bool is_continuation;
+
+		if (line[0] == '\0' || line[0] == '#' || line[0] == '\n') {
+			lineno++;
+			continue;
+		}
+
+		linelen = strlen(line);
+		if (linelen == MAX_LINE_LEN) {
+			print_parse_error("line too long", line, lineno);
+			return -EINVAL;
+		}
+
+		is_continuation = isspace(line[0]);
+		name = strip(line, linelen);
+
+		if (!is_continuation) {
+			name = strtok(name, " \t");
+			rules = strtok(NULL, "");
+		} else {
+			if (!prev_name) {
+				print_parse_error("invalid rule continuation",
+						  line, lineno);
+				return -EINVAL;
+			}
+
+			rules = name;
+			name = NULL;
+		}
+
+		if (rules[0] == '\0') {
+			print_parse_error("invalid empty rule\n", line, lineno);
+			return -EINVAL;
+		}
+
+		if (name) {
+			fprintf(cheader, "\t%s_%s = %u,\n", prefix, name, idx);
+
+			/* Close previous entry before starting a new one */
+			if (idx)
+				fprintf(csource, ") },\n");
+
+			fprintf(csource, "{ XE_RTP_NAME(\"%s\"),\n  XE_RTP_RULES(%s",
+				name, rules);
+			idx++;
+		} else {
+			fprintf(csource, ", OR,\n\t%s", rules);
+		}
+
+		lineno++;
+		if (!is_continuation)
+			prev_name = name;
+	}
+
+	/* Close last entry */
+	if (idx)
+		fprintf(csource, ") },\n");
+
+	fprintf(cheader, "\t_%s_COUNT = %u\n", prefix, idx);
+
+	return 0;
+}
+
+/* Avoid GNU vs POSIX basename() discrepancy, just use our own */
+static const char *xbasename(const char *s)
+{
+	const char *p = strrchr(s, '/');
+
+	return p ? p + 1 : s;
+}
+
+static int fn_to_prefix(const char *fn, char *prefix, size_t size)
+{
+	size_t len;
+
+	fn = xbasename(fn);
+	len = strlen(fn);
+
+	if (len > size - 1)
+		return -ENAMETOOLONG;
+
+	memcpy(prefix, fn, len + 1);
+
+	for (char *p = prefix; *p; p++) {
+		switch (*p) {
+		case '.':
+			*p = '\0';
+			return 0;
+		default:
+			*p = toupper(*p);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+int main(int argc, const char *argv[])
+{
+	enum {
+		ARGS_INPUT,
+		ARGS_CSOURCE,
+		ARGS_CHEADER,
+		_ARGS_COUNT
+	};
+	struct {
+		const char *fn;
+		const char *mode;
+		FILE *f;
+	} args[] = {
+		[ARGS_INPUT] = { .fn = argv[1], .mode = "r" },
+		[ARGS_CSOURCE] = { .fn = argv[2], .mode = "w" },
+		[ARGS_CHEADER] = { .fn = argv[3], .mode = "w" },
+	};
+	int ret = 1;
+	char prefix[128];
+
+	if (argc < 3) {
+		fprintf(stderr, "ERROR: wrong arguments\n");
+		print_usage(stderr, argv[0]);
+		return 1;
+	}
+
+	if (fn_to_prefix(args[ARGS_CHEADER].fn, prefix, sizeof(prefix)) < 0)
+		return 1;
+
+	for (int i = 0; i < _ARGS_COUNT; i++) {
+		args[i].f = fopen(args[i].fn, args[i].mode);
+		if (!args[i].f) {
+			fprintf(stderr, "ERROR: Can't open %s: %m\n",
+				args[i].fn);
+			goto err;
+		}
+	}
+
+	fprintf(args[ARGS_CHEADER].f, HEADER, args[ARGS_INPUT].fn, prefix, prefix);
+
+	ret = parse(args[ARGS_INPUT].f, args[ARGS_CSOURCE].f,
+		    args[ARGS_CHEADER].f, prefix);
+	if (!ret)
+		fprintf(args[ARGS_CHEADER].f, FOOTER);
+
+err:
+	for (int i = 0; i < _ARGS_COUNT; i++) {
+		if (args[i].f)
+			fclose(args[i].f);
+	}
+
+	return ret;
+}