[PATCH v3 i-g-t 4/6] tests: Add core_sysfs

[Peter Senna Tschudin]

core_sysfs is GPU-agnostic test designed to work with any GPU, not
limited to i915 and Xe. The test scans the sysfs directory associated
with the GPU, reads all files, and discards the content.

Cc: michal.wajdeczko at intel.com
Cc: marcin.bernatowicz at intel.com
Cc: kamil.konieczny at linux.intel.com
Cc: katarzyna.piecielska at intel.com
Cc: zbigniew.kempczynski at intel.com
Cc: ewelina.musial at intel.com
Signed-off-by: Peter Senna Tschudin <peter.senna at linux.intel.com>
---
v3:
 - removed "sysfs" from the name of subtest (Thanks Michal Wajdeczko)
v2:
 - changed style of comparison to NULL

 tests/core_sysfs.c                       | 58 ++++++++++++++++++++++++
 tests/intel-ci/fast-feedback.testlist    |  1 +
 tests/intel-ci/xe-fast-feedback.testlist |  1 +
 tests/meson.build                        |  1 +
 4 files changed, 61 insertions(+)
 create mode 100644 tests/core_sysfs.c

diff --git a/tests/core_sysfs.c b/tests/core_sysfs.c
new file mode 100644
index 000000000..db70e940b
--- /dev/null
+++ b/tests/core_sysfs.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#include "igt.h"
+#include "igt_dir.h"
+#include "igt_sysfs.h"
+
+struct {
+	bool warn_on_not_hit;
+} opt = { 0 };
+
+/**
+ * TEST: sysfs test
+ * Description: Read entries from sysfs path.
+ * Category: Core
+ * Mega feature: General Core features
+ * Sub-category: uapi
+ * Functionality: sysfs
+ * Feature: core
+ * Test category: uapi
+ *
+ * SUBTEST: read-all-entries
+ * Description: Read all entries from sysfs path
+ *
+ */
+
+IGT_TEST_DESCRIPTION("Read entries from sysfs paths.");
+
+igt_main
+{
+	int fd = -1;
+	int sysfs = -1;
+	igt_dir_t *igt_dir = NULL;
+
+	igt_fixture {
+		fd = drm_open_driver_master(DRIVER_ANY);
+		sysfs = igt_sysfs_open(fd);
+		igt_require(sysfs >= 0);
+
+		igt_dir = igt_dir_create(sysfs);
+		igt_require(igt_dir);
+
+		kmstest_set_vt_graphics_mode();
+	}
+
+	igt_describe("Read all entries from sysfs path.");
+	igt_subtest("read-all-entries") {
+		igt_dir_scan_dirfd(igt_dir, -1);
+		igt_dir_process_files(igt_dir, NULL, NULL);
+	}
+
+	igt_fixture {
+		close(sysfs);
+		drm_close_driver(fd);
+	}
+}
diff --git a/tests/intel-ci/fast-feedback.testlist b/tests/intel-ci/fast-feedback.testlist
index 3ec1b95cf..5d4d101ef 100644
--- a/tests/intel-ci/fast-feedback.testlist
+++ b/tests/intel-ci/fast-feedback.testlist
@@ -4,6 +4,7 @@ igt at i915_module_load@load
 # Keep alphabetically sorted by default
 igt at core_auth@basic-auth
 igt at core_debugfs@read-all-entries
+igt at core_sysfs@read-all-entries
 igt at fbdev@eof
 igt at fbdev@info
 igt at fbdev@nullptr
diff --git a/tests/intel-ci/xe-fast-feedback.testlist b/tests/intel-ci/xe-fast-feedback.testlist
index ac3177ae9..a5f799f6b 100644
--- a/tests/intel-ci/xe-fast-feedback.testlist
+++ b/tests/intel-ci/xe-fast-feedback.testlist
@@ -8,6 +8,7 @@ igt at fbdev@read
 igt at fbdev@write
 
 igt at core_debugfs@read-all-entries
+igt at core_sysfs@read-all-entries
 igt at intel_sysfs_debugfs@xe-base
 igt at intel_sysfs_debugfs@xe-debugfs-read-all-entries
 igt at intel_sysfs_debugfs@xe-forcewake
diff --git a/tests/meson.build b/tests/meson.build
index 99dbd4feb..a06172d2e 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -8,6 +8,7 @@ test_progs = [
 	'core_hotunplug',
 	'core_setmaster',
 	'core_setmaster_vs_auth',
+	'core_sysfs',
 	'dmabuf',
 	'dmabuf_sync_file',
 	'device_reset',
-- 
2.43.0