From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Date: Thu, 19 Mar 2026 18:48:45 +0000 (+0200)
Subject: wifi: iwlwifi: acpi: add support for WRDS rev 3 table
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=60db0a1a70fa44ac85dcb90fc986235f9d4c9fb0;p=thirdparty%2Flinux.git

wifi: iwlwifi: acpi: add support for WRDS rev 3 table

This table includes another sub-band for UNII-9.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20260319204647.06543ec65e00.I73135c7d61bff9b46ad9862d93f4faf923983fd4@changeid
---

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
index 4d0a938323362..debbba22a9093 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
@@ -535,7 +535,23 @@ int iwl_acpi_get_wrds_table(struct iwl_fw_runtime *fwrt)
 	if (IS_ERR(data))
 		return PTR_ERR(data);
 
-	/* start by trying to read revision 2 */
+	/* start by trying to read revision 3 */
+	wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
+					 ACPI_WRDS_WIFI_DATA_SIZE_REV3,
+					 &tbl_rev);
+	if (!IS_ERR(wifi_pkg)) {
+		if (tbl_rev != 3) {
+			ret = -EINVAL;
+			goto out_free;
+		}
+
+		num_chains = ACPI_SAR_NUM_CHAINS_REV2;
+		num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV3;
+
+		goto read_table;
+	}
+
+	/* then try revision 2 */
 	wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
 					 ACPI_WRDS_WIFI_DATA_SIZE_REV2,
 					 &tbl_rev);
@@ -592,6 +608,13 @@ read_table:
 		goto out_free;
 	}
 
+	if (WARN_ON(num_chains * num_sub_bands >
+		    ARRAY_SIZE(fwrt->sar_profiles[0].chains) *
+		    ARRAY_SIZE(fwrt->sar_profiles[0].chains[0].subbands))) {
+		ret = -EINVAL;
+		goto out_free;
+	}
+
 	IWL_DEBUG_RADIO(fwrt, "Reading WRDS tbl_rev=%d\n", tbl_rev);
 
 	flags = wifi_pkg->package.elements[1].integer.value;
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.h b/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
index 138fdb9a5273e..ec6af1b58098b 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
@@ -39,6 +39,7 @@
 #define ACPI_SAR_NUM_SUB_BANDS_REV0	5
 #define ACPI_SAR_NUM_SUB_BANDS_REV1	11
 #define ACPI_SAR_NUM_SUB_BANDS_REV2	11
+#define ACPI_SAR_NUM_SUB_BANDS_REV3	12
 
 #define ACPI_WRDS_WIFI_DATA_SIZE_REV0	(ACPI_SAR_NUM_CHAINS_REV0 * \
 					 ACPI_SAR_NUM_SUB_BANDS_REV0 + 2)
@@ -46,6 +47,8 @@
 					 ACPI_SAR_NUM_SUB_BANDS_REV1 + 2)
 #define ACPI_WRDS_WIFI_DATA_SIZE_REV2	(ACPI_SAR_NUM_CHAINS_REV2 * \
 					 ACPI_SAR_NUM_SUB_BANDS_REV2 + 2)
+#define ACPI_WRDS_WIFI_DATA_SIZE_REV3	(ACPI_SAR_NUM_CHAINS_REV2 * \
+					 ACPI_SAR_NUM_SUB_BANDS_REV3 + 2)
 #define ACPI_EWRD_WIFI_DATA_SIZE_REV0	((ACPI_SAR_PROFILE_NUM - 1) * \
 					 ACPI_SAR_NUM_CHAINS_REV0 * \
 					 ACPI_SAR_NUM_SUB_BANDS_REV0 + 3)