iwlwifi: mvm: allow enabling UHB TAS in the USA via ACPI setting

Read a new bit defined in ACPI WTAS that allows OEMs to specify whether
TAS is allowed in UHB (6-7GHz) in the USA.  This can be used by OEMs
that got certified to use this feature.

Signed-off-by: Ayala Barazani <ayala.barazani@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220128153014.1d2ae1e6bcdb.I177929ed01ed7bf4614ea0f6db2af9e52de13316@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

3 files changed, 41 insertions, 7 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
index 790c96df58cb..0e9e61508ae5 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c
@@ -242,7 +242,7 @@ found:
 IWL_EXPORT_SYMBOL(iwl_acpi_get_wifi_pkg_range);
 
 int iwl_acpi_get_tas(struct iwl_fw_runtime *fwrt,
-		     struct iwl_tas_config_cmd_v3 *cmd)
+		     union iwl_tas_config_cmd *cmd, int fw_ver)
 {
 	union acpi_object *wifi_pkg, *data;
 	int ret, tbl_rev, i, block_list_size, enabled;
@@ -268,10 +268,18 @@ int iwl_acpi_get_tas(struct iwl_fw_runtime *fwrt,
 			(tas_selection & ACPI_WTAS_OVERRIDE_IEC_MSK) >> ACPI_WTAS_OVERRIDE_IEC_POS;
 		u16 enabled_iec = (tas_selection & ACPI_WTAS_ENABLE_IEC_MSK) >>
 			ACPI_WTAS_ENABLE_IEC_POS;
+		u8 usa_tas_uhb = (tas_selection & ACPI_WTAS_USA_UHB_MSK) >> ACPI_WTAS_USA_UHB_POS;
+
 
 		enabled = tas_selection & ACPI_WTAS_ENABLED_MSK;
-		cmd->override_tas_iec = cpu_to_le16(override_iec);
-		cmd->enable_tas_iec = cpu_to_le16(enabled_iec);
+		if (fw_ver <= 3) {
+			cmd->v3.override_tas_iec = cpu_to_le16(override_iec);
+			cmd->v3.enable_tas_iec = cpu_to_le16(enabled_iec);
+		} else {
+			cmd->v4.usa_tas_uhb_allowed = usa_tas_uhb;
+			cmd->v4.override_tas_iec = (u8)override_iec;
+			cmd->v4.enable_tas_iec = (u8)enabled_iec;
+		}
 
 	} else if (tbl_rev == 0 &&
 		wifi_pkg->package.elements[1].type == ACPI_TYPE_INTEGER) {
@@ -297,7 +305,7 @@ int iwl_acpi_get_tas(struct iwl_fw_runtime *fwrt,
 		goto out_free;
 	}
 	block_list_size = wifi_pkg->package.elements[2].integer.value;
-	cmd->block_list_size = cpu_to_le32(block_list_size);
+	cmd->v4.block_list_size = cpu_to_le32(block_list_size);
 
 	IWL_DEBUG_RADIO(fwrt, "TAS array size %u\n", block_list_size);
 	if (block_list_size > APCI_WTAS_BLACK_LIST_MAX) {
@@ -319,7 +327,7 @@ int iwl_acpi_get_tas(struct iwl_fw_runtime *fwrt,
 		}
 
 		country = wifi_pkg->package.elements[3 + i].integer.value;
-		cmd->block_list_array[i] = cpu_to_le32(country);
+		cmd->v4.block_list_array[i] = cpu_to_le32(country);
 		IWL_DEBUG_RADIO(fwrt, "TAS block list country %d\n", country);
 	}
 
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.h b/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
index 22b3c665f91a..5ac0979123fc 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.h
@@ -77,6 +77,8 @@
 #define ACPI_WTAS_ENABLE_IEC_MSK	0x4
 #define ACPI_WTAS_OVERRIDE_IEC_POS	0x1
 #define ACPI_WTAS_ENABLE_IEC_POS	0x2
+#define ACPI_WTAS_USA_UHB_MSK		BIT(16)
+#define ACPI_WTAS_USA_UHB_POS		16
 
 
 #define ACPI_PPAG_WIFI_DATA_SIZE_V1	((IWL_NUM_CHAIN_LIMITS * \
@@ -213,7 +215,7 @@ int iwl_sar_geo_init(struct iwl_fw_runtime *fwrt,
 		     u32 n_bands, u32 n_profiles);
 
 int iwl_acpi_get_tas(struct iwl_fw_runtime *fwrt,
-		     struct iwl_tas_config_cmd_v3 *cmd);
+		     union iwl_tas_config_cmd *cmd, int fw_ver);
 
 __le32 iwl_acpi_get_lari_config_bitmap(struct iwl_fw_runtime *fwrt);
 
@@ -294,7 +296,7 @@ static inline bool iwl_sar_geo_support(struct iwl_fw_runtime *fwrt)
 }
 
 static inline int iwl_acpi_get_tas(struct iwl_fw_runtime *fwrt,
-				   struct iwl_tas_config_cmd_v3 *cmd)
+				   union iwl_tas_config_cmd *cmd, int fw_ver)
 {
 	return -ENOENT;
 }
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/nvm-reg.h b/drivers/net/wireless/intel/iwlwifi/fw/api/nvm-reg.h
index 4949fcf85257..fc85ec426f43 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/nvm-reg.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/nvm-reg.h
@@ -420,6 +420,30 @@ struct iwl_tas_config_cmd_v3 {
 } __packed; /* TAS_CONFIG_CMD_API_S_VER_3 */
 
 /**
+ * struct iwl_tas_config_cmd_v3 - configures the TAS
+ * @block_list_size: size of relevant field in block_list_array
+ * @block_list_array: list of countries where TAS must be disabled
+ * @override_tas_iec: indicates whether to override default value of IEC regulatory
+ * @enable_tas_iec: in case override_tas_iec is set -
+ *	indicates whether IEC regulatory is enabled or disabled
+ * @usa_tas_uhb_allowed: if set, allow TAS UHB in the USA
+ * @reserved: reserved
+*/
+struct iwl_tas_config_cmd_v4 {
+	__le32 block_list_size;
+	__le32 block_list_array[IWL_TAS_BLOCK_LIST_MAX];
+	u8 override_tas_iec;
+	u8 enable_tas_iec;
+	u8 usa_tas_uhb_allowed;
+	u8 reserved;
+} __packed; /* TAS_CONFIG_CMD_API_S_VER_4 */
+
+union iwl_tas_config_cmd {
+	struct iwl_tas_config_cmd_v2 v2;
+	struct iwl_tas_config_cmd_v3 v3;
+	struct iwl_tas_config_cmd_v4 v4;
+};
+/**
  * enum iwl_lari_configs - bit masks for the various LARI config operations
  * @LARI_CONFIG_DISABLE_11AC_UKRAINE_MSK: disable 11ac in ukraine
  * @LARI_CONFIG_CHANGE_ETSI_TO_PASSIVE_MSK: ETSI 5.8GHz SRD passive scan