[PATCH v7 1/7] lib/intel_wa: Add check for workaround in GTs

[Mohammed Thasleem]

This function check the given workaround on available GTs.

v2: Add discription for return. (Kamil)
    Rename function to igt_has_intel_wa. (Kamil)
    Move lib changes to lib/igt_debugfs. (Kamil)
    Dump the whole wa sysfs file and then search for the wa. (Vinod)
    Use return true/false directly instead assigning value. (Vinod)
v3: Updated return type discription and debugfs_fd failure check. (Kamil)
    Return 0 or 1 instead of true or false. (Kamil)
v4: Add check for xe device before execution. (Vinod)
v5: Move igt_has_intel_wa to lib/intel_wa. (Kamil)
v6: Remove unused header and move xe check to intel_is_fbc_supported. (Kamil)
v7: Update the title and move header from .h to .c file. (Kamil)

Signed-off-by: Mohammed Thasleem <mohammed.thasleem at intel.com>
---
 lib/intel_wa.c  | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 lib/intel_wa.h  | 11 +++++++++++
 lib/meson.build |  1 +
 3 files changed, 60 insertions(+)
 create mode 100644 lib/intel_wa.c
 create mode 100644 lib/intel_wa.h

diff --git a/lib/intel_wa.c b/lib/intel_wa.c
new file mode 100644
index 000000000..6abeee308
--- /dev/null
+++ b/lib/intel_wa.c
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "igt_debugfs.h"
+#include "igt_sysfs.h"
+#include "intel_wa.h"
+#include "xe/xe_query.h"
+
+/**
+ * igt_has_intel_wa:
+ * @drm_fd:	A drm file descriptor
+ * @check_wa:	Workaround to be checked
+ *
+ * Returns:	0 if no WA, 1 if WA present, -1 on error
+ */
+int igt_has_intel_wa(int drm_fd, const char *check_wa)
+{
+	int debugfs_fd;
+	unsigned int xe;
+	char name[256];
+	char *debugfs_dump, *has_wa;
+
+	debugfs_fd = igt_debugfs_dir(drm_fd);
+	if (debugfs_fd == -1)
+		return -1;
+
+	xe_for_each_gt(drm_fd, xe) {
+		sprintf(name, "gt%d/workarounds", xe);
+		if (!igt_debugfs_exists(drm_fd, name, O_RDONLY))
+			return -1;
+
+		debugfs_dump = igt_sysfs_get(debugfs_fd, name);
+		if (debugfs_dump != NULL) {
+			has_wa = strstr(debugfs_dump, check_wa);
+			free(debugfs_dump);
+			if (has_wa)
+				return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/lib/intel_wa.h b/lib/intel_wa.h
new file mode 100644
index 000000000..765a5948e
--- /dev/null
+++ b/lib/intel_wa.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#ifndef __INTEL_WA_H__
+#define __INTEL_WA_H__
+
+int igt_has_intel_wa(int drm_fd, const char *check_wa);
+
+#endif /* __INTEL_WA_H__ */
diff --git a/lib/meson.build b/lib/meson.build
index 5e4247aad..ef397fe45 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -88,6 +88,7 @@ lib_sources = [
 	'intel_aux_pgtable.c',
 	'intel_reg_map.c',
 	'intel_iosf.c',
+        'intel_wa.c',
 	'igt_kms.c',
 	'igt_fb.c',
 	'igt_core.c',
-- 
2.34.1