wifi: iwlwifi: mvm: support new key API

In order to support MLD, the key API is also changing to have
station masks instead of just the station ID etc. Change the
driver to support this, and add the new code in a new file so
it's more clearly separated.

For now this isn't separated at the mac80211 ops level, which
we wanted to do, but we're calling these functions in a place
when pre-start keys are installed in iwl_mvm_start_ap_ibss(),
and the function has some glue logic to mac80211. We may want
to change that later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20221102165239.ed9ccd814abc.Iacc7360de68807fbac19e5b67c86504b39cc15df@changeid

1 files changed, 79 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
index 43619acc29fd..d07982d8c897 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
@@ -72,6 +72,11 @@ enum iwl_data_path_subcmd_ids {
 	SCD_QUEUE_CONFIG_CMD = 0x17,
 
 	/**
+	 * @SEC_KEY_CMD: security key command, uses &struct iwl_sec_key_cmd
+	 */
+	SEC_KEY_CMD = 0x18,
+
+	/**
 	 * @MONITOR_NOTIF: Datapath monitoring notification, using
 	 *	&struct iwl_datapath_monitor_notif
 	 */
@@ -403,4 +408,78 @@ struct iwl_scd_queue_cfg_cmd {
 	} __packed u; /* TX_QUEUE_CFG_CMD_OPERATION_API_U_VER_1 */
 } __packed; /* TX_QUEUE_CFG_CMD_API_S_VER_3 */
 
+/**
+ * enum iwl_sec_key_flags - security key command key flags
+ * @IWL_SEC_KEY_FLAG_CIPHER_MASK: cipher mask
+ * @IWL_SEC_KEY_FLAG_CIPHER_WEP: WEP cipher
+ * @IWL_SEC_KEY_FLAG_CIPHER_CCMP: CCMP/CMAC cipher
+ * @IWL_SEC_KEY_FLAG_CIPHER_TKIP: TKIP cipher
+ * @IWL_SEC_KEY_FLAG_CIPHER_GCMP: GCMP/GMAC cipher
+ * @IWL_SEC_KEY_FLAG_NO_TX: don't install for TX
+ * @IWL_SEC_KEY_FLAG_KEY_SIZE: large key size (WEP-104, GCMP-256, GMAC-256)
+ * @IWL_SEC_KEY_FLAG_MFP: MFP is in used for this key
+ * @IWL_SEC_KEY_FLAG_MCAST_KEY: this is a multicast key
+ * @IWL_SEC_KEY_FLAG_SPP_AMSDU: SPP A-MSDU should be used
+ */
+enum iwl_sec_key_flags {
+	IWL_SEC_KEY_FLAG_CIPHER_MASK	= 0x07,
+	IWL_SEC_KEY_FLAG_CIPHER_WEP	= 0x01,
+	IWL_SEC_KEY_FLAG_CIPHER_CCMP	= 0x02,
+	IWL_SEC_KEY_FLAG_CIPHER_TKIP	= 0x03,
+	IWL_SEC_KEY_FLAG_CIPHER_GCMP	= 0x05,
+	IWL_SEC_KEY_FLAG_NO_TX		= 0x08,
+	IWL_SEC_KEY_FLAG_KEY_SIZE	= 0x10,
+	IWL_SEC_KEY_FLAG_MFP		= 0x20,
+	IWL_SEC_KEY_FLAG_MCAST_KEY	= 0x40,
+	IWL_SEC_KEY_FLAG_SPP_AMSDU	= 0x80,
+};
+
+#define IWL_SEC_WEP_KEY_OFFSET	3
+
+/**
+ * struct iwl_sec_key_cmd - security key command
+ * @action: action from &enum iwl_ctxt_action
+ * @u.add.sta_mask: station mask for the new key
+ * @u.add.key_id: key ID (0-7) for the new key
+ * @u.add.key_flags: key flags per &enum iwl_sec_key_flags
+ * @u.add.key: key material. WEP keys should start from &IWL_SEC_WEP_KEY_OFFSET.
+ * @u.add.tkip_mic_rx_key: TKIP MIC RX key
+ * @u.add.tkip_mic_tx_key: TKIP MIC TX key
+ * @u.add.rx_seq: RX sequence counter value
+ * @u.add.tx_seq: TX sequence counter value
+ * @u.modify.old_sta_mask: old station mask
+ * @u.modify.new_sta_mask: new station mask
+ * @u.modify.key_id: key ID
+ * @u.modify.key_flags: new key flags
+ * @u.remove.sta_mask: station mask
+ * @u.remove.key_id: key ID
+ * @u.remove.key_flags: key flags
+ */
+struct iwl_sec_key_cmd {
+	__le32 action;
+	union {
+		struct {
+			__le32 sta_mask;
+			__le32 key_id;
+			__le32 key_flags;
+			u8 key[32];
+			u8 tkip_mic_rx_key[8];
+			u8 tkip_mic_tx_key[8];
+			__le64 rx_seq;
+			__le64 tx_seq;
+		} __packed add; /* SEC_KEY_ADD_CMD_API_S_VER_1 */
+		struct {
+			__le32 old_sta_mask;
+			__le32 new_sta_mask;
+			__le32 key_id;
+			__le32 key_flags;
+		} __packed modify; /* SEC_KEY_MODIFY_CMD_API_S_VER_1 */
+		struct {
+			__le32 sta_mask;
+			__le32 key_id;
+			__le32 key_flags;
+		} __packed remove; /* SEC_KEY_REMOVE_CMD_API_S_VER_1 */
+	} __packed u; /* SEC_KEY_OPERATION_API_U_VER_1 */
+} __packed; /* SEC_KEY_CMD_API_S_VER_1 */
+
 #endif /* __iwl_fw_api_datapath_h__ */