1 files changed, 234 insertions, 0 deletions
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..784433bb246a
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/tests/devinfo.c
@@ -0,0 +1,234 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * KUnit tests for the iwlwifi device info table
+ *
+ * Copyright (C) 2023-2025 Intel Corporation
+ */
+#include <kunit/test.h>
+#include <linux/pci.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)
+{
+	u16 subdevice_mask = GENMASK(di->subdevice_m_h, di->subdevice_m_l);
+	char buf[100] = {};
+	int pos = 0;
+
+	if (di->match_rf_type)
+		pos += scnprintf(buf + pos, sizeof(buf) - pos,
+				 " rf_type=%03x", di->rf_type);
+	else
+		pos += scnprintf(buf + pos, sizeof(buf) - pos,
+				 " rf_type=*");
+
+	if (di->match_bw_limit)
+		pos += scnprintf(buf + pos, sizeof(buf) - pos,
+				 " bw_limit=%d", di->bw_limit);
+	else
+		pos += scnprintf(buf + pos, sizeof(buf) - pos,
+				 " bw_limit=*");
+
+	if (di->match_rf_step)
+		pos += scnprintf(buf + pos, sizeof(buf) - pos,
+				 " rf_step=%c",
+				 di->rf_step == SILICON_Z_STEP ? 'Z' :
+				 	'A' + di->rf_step);
+	else
+		pos += scnprintf(buf + pos, sizeof(buf) - pos,
+				 " rf_step=*");
+
+	if (di->match_rf_id)
+		pos += scnprintf(buf + pos, sizeof(buf) - pos,
+				 " rf_id=0x%x", di->rf_id);
+	else
+		pos += scnprintf(buf + pos, sizeof(buf) - pos,
+				 " rf_id=*");
+
+	if (di->match_cdb)
+		pos += scnprintf(buf + pos, sizeof(buf) - pos,
+				 " cdb=%d", di->cdb);
+	else
+		pos += scnprintf(buf + pos, sizeof(buf) - pos,
+				 " cdb=*");
+
+
+	printk(KERN_DEBUG "%sdev=%04x subdev=%04x/%04x%s\n",
+	       pfx, di->device, di->subdevice, subdevice_mask, buf);
+}
+
+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->rf_type, di->cdb,
+					    di->rf_id, di->bw_limit,
+					    di->rf_step);
+		if (!ret) {
+			iwl_pci_print_dev_info("No entry found for: ", di);
+			KUNIT_FAIL(test,
+				   "No entry found for entry at index %d\n", idx);
+		} else 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 void devinfo_names(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];
+
+		KUNIT_ASSERT_TRUE(test, di->name);
+	}
+}
+
+static void devinfo_no_cfg_dups(struct kunit *test)
+{
+	for (int i = 0; i < iwl_dev_info_table_size; i++) {
+		const struct iwl_rf_cfg *cfg_i = iwl_dev_info_table[i].cfg;
+
+		for (int j = 0; j < i; j++) {
+			const struct iwl_rf_cfg *cfg_j = iwl_dev_info_table[j].cfg;
+
+			if (cfg_i == cfg_j)
+				continue;
+
+			KUNIT_EXPECT_NE_MSG(test, memcmp(cfg_i, cfg_j,
+							 sizeof(*cfg_i)), 0,
+					    "identical configs: %ps and %ps\n",
+					    cfg_i, cfg_j);
+		}
+	}
+}
+
+static void devinfo_no_name_dups(struct kunit *test)
+{
+	for (int i = 0; i < iwl_dev_info_table_size; i++) {
+		for (int j = 0; j < i; j++) {
+			if (iwl_dev_info_table[i].name == iwl_dev_info_table[j].name)
+				continue;
+
+			KUNIT_EXPECT_NE_MSG(test,
+					    strcmp(iwl_dev_info_table[i].name,
+						   iwl_dev_info_table[j].name),
+					    0,
+					    "name dup: %ps/%ps",
+					    iwl_dev_info_table[i].name,
+					    iwl_dev_info_table[j].name);
+		}
+	}
+}
+
+static void devinfo_check_subdev_match(struct kunit *test)
+{
+	for (int i = 0; i < iwl_dev_info_table_size; i++) {
+		const struct iwl_dev_info *di = &iwl_dev_info_table[i];
+		u16 subdevice_mask = GENMASK(di->subdevice_m_h,
+					     di->subdevice_m_l);
+
+		/* if BW limit bit is matched then must have a limit */
+		if (di->match_bw_limit == 1 && di->bw_limit == 1)
+			KUNIT_EXPECT_NE(test, di->cfg->bw_limit, 0);
+
+		/* if subdevice is ANY we can have RF ID/BW limit */
+		if (di->subdevice == (u16)IWL_CFG_ANY)
+			continue;
+
+		/* same if the subdevice mask doesn't overlap them */
+		if (IWL_SUBDEVICE_RF_ID(subdevice_mask) == 0 &&
+		    IWL_SUBDEVICE_BW_LIM(subdevice_mask) == 0)
+			continue;
+
+		/* but otherwise they shouldn't be used */
+		KUNIT_EXPECT_EQ(test, (int)di->match_rf_id, 0);
+		KUNIT_EXPECT_EQ(test, (int)di->match_bw_limit, 0);
+	}
+}
+
+static void devinfo_check_killer_subdev(struct kunit *test)
+{
+	for (int i = 0; i < iwl_dev_info_table_size; i++) {
+		const struct iwl_dev_info *di = &iwl_dev_info_table[i];
+
+		if (!strstr(di->name, "Killer"))
+			continue;
+
+		KUNIT_EXPECT_NE(test, di->subdevice, (u16)IWL_CFG_ANY);
+	}
+}
+
+static void devinfo_pci_ids(struct kunit *test)
+{
+	struct pci_dev *dev;
+
+	dev = kunit_kmalloc(test, sizeof(*dev), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, dev);
+
+	for (int i = 0; iwl_hw_card_ids[i].vendor; i++) {
+		const struct pci_device_id *s, *t;
+
+		s = &iwl_hw_card_ids[i];
+		dev->vendor = s->vendor;
+		dev->device = s->device;
+		dev->subsystem_vendor = s->subvendor;
+		dev->subsystem_device = s->subdevice;
+		dev->class = s->class;
+
+		t = pci_match_id(iwl_hw_card_ids, dev);
+		KUNIT_EXPECT_PTR_EQ(test, t, s);
+	}
+}
+
+static void devinfo_no_mac_cfg_dups(struct kunit *test)
+{
+	for (int i = 0; iwl_hw_card_ids[i].vendor; i++) {
+		const struct iwl_mac_cfg *cfg_i =
+			(void *)iwl_hw_card_ids[i].driver_data;
+
+		for (int j = 0; j < i; j++) {
+			const struct iwl_mac_cfg *cfg_j =
+				(void *)iwl_hw_card_ids[j].driver_data;
+
+			if (cfg_i == cfg_j)
+				continue;
+
+			KUNIT_EXPECT_NE_MSG(test, memcmp(cfg_j, cfg_i,
+							 sizeof(*cfg_i)), 0,
+					    "identical configs: %ps and %ps\n",
+					    cfg_i, cfg_j);
+		}
+	}
+}
+
+static struct kunit_case devinfo_test_cases[] = {
+	KUNIT_CASE(devinfo_table_order),
+	KUNIT_CASE(devinfo_names),
+	KUNIT_CASE(devinfo_no_cfg_dups),
+	KUNIT_CASE(devinfo_no_name_dups),
+	KUNIT_CASE(devinfo_check_subdev_match),
+	KUNIT_CASE(devinfo_check_killer_subdev),
+	KUNIT_CASE(devinfo_pci_ids),
+	KUNIT_CASE(devinfo_no_mac_cfg_dups),
+	{}
+};
+
+static struct kunit_suite iwlwifi_devinfo = {
+	.name = "iwlwifi-devinfo",
+	.test_cases = devinfo_test_cases,
+};
+
+kunit_test_suite(iwlwifi_devinfo);