wifi: iwlwifi: add kunit test for devinfo ordering

We used to have a test built into the code for this internally,
but now we can put that into kunit and let everyone run it, to
verify the devinfo table ordering if it's changed.

Signed-off-by: Johannes Berg <[email protected]>
Reviewed-by: Benjamin Berg <[email protected]>
Reviewed-by: Gregory Greenman <[email protected]>
Signed-off-by: Miri Korenblit <[email protected]>
Link: https://msgid.link/20240123200528.a4a8af7c091f.I0fb09083317b331168b99b8db39656a126a5cc4d@changeid
Signed-off-by: Johannes Berg <[email protected]>

3 files changed, 71 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/tests/Makefile b/drivers/net/wireless/intel/iwlwifi/tests/Makefile
new file mode 100644
index 000000000000..5658471bdf0a
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/tests/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+
+iwlwifi-tests-y += module.o devinfo.o
+
+ccflags-y += -I$(srctree)/$(src)/../
+
+obj-$(CONFIG_IWLWIFI_KUNIT_TESTS) += iwlwifi-tests.o
diff --git a/drivers/net/wireless/intel/iwlwifi/tests/devinfo.c b/drivers/net/wireless/intel/iwlwifi/tests/devinfo.c
new file mode 100644
index 000000000000..7aa47fce6e2d
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/tests/devinfo.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * KUnit tests for the iwlwifi device info table
+ *
+ * Copyright (C) 2023 Intel Corporation
+ */
+#include <kunit/test.h>
+#include "iwl-drv.h"
+#include "iwl-config.h"
+
+MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
+
+static void iwl_pci_print_dev_info(const char *pfx, const struct iwl_dev_info *di)
+{
+	printk(KERN_DEBUG "%sdev=%.4x,subdev=%.4x,mac_type=%.4x,mac_step=%.4x,rf_type=%.4x,cdb=%d,jacket=%d,rf_id=%.2x,no_160=%d,cores=%.2x\n",
+	       pfx, di->device, di->subdevice, di->mac_type, di->mac_step,
+	       di->rf_type, di->cdb, di->jacket, di->rf_id, di->no_160,
+	       di->cores);
+}
+
+static void devinfo_table_order(struct kunit *test)
+{
+	int idx;
+
+	for (idx = 0; idx < iwl_dev_info_table_size; idx++) {
+		const struct iwl_dev_info *di = &iwl_dev_info_table[idx];
+		const struct iwl_dev_info *ret;
+
+		ret = iwl_pci_find_dev_info(di->device, di->subdevice,
+					    di->mac_type, di->mac_step,
+					    di->rf_type, di->cdb,
+					    di->jacket, di->rf_id,
+					    di->no_160, di->cores, di->rf_step);
+		if (ret != di) {
+			iwl_pci_print_dev_info("searched: ", di);
+			iwl_pci_print_dev_info("found:    ", ret);
+			KUNIT_FAIL(test,
+				   "unusable entry at index %d (found index %d instead)\n",
+				   idx, (int)(ret - iwl_dev_info_table));
+		}
+	}
+}
+
+static struct kunit_case devinfo_test_cases[] = {
+	KUNIT_CASE(devinfo_table_order),
+	{}
+};
+
+static struct kunit_suite iwlwifi_devinfo = {
+	.name = "iwlwifi-devinfo",
+	.test_cases = devinfo_test_cases,
+};
+
+kunit_test_suite(iwlwifi_devinfo);
diff --git a/drivers/net/wireless/intel/iwlwifi/tests/module.c b/drivers/net/wireless/intel/iwlwifi/tests/module.c
new file mode 100644
index 000000000000..0c54f818e5a7
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/tests/module.c
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Module boilerplate for the iwlwifi kunit module.
+ *
+ * Copyright (C) 2023 Intel Corporation
+ */
+#include <linux/module.h>
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("kunit tests for iwlwifi");