ath10k: add new cipher suite support

QCA99x0 and QCA4019 family chips support CCMP-256, GCMP-128, and
GCMP-256 ciphers in hardware, so advertise support for these. As
firmware does not support group management frame ciphers (BIP),
handle them in software (mac80211).
Reviewed-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Cc: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/core.c

@@ -74,6 +74,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.spectral_bin_discard = 0,
 		.vht160_mcs_rx_highest = 0,
 		.vht160_mcs_tx_highest = 0,
+		.n_cipher_suites = 8,
 	},
 	{
 		.id = QCA9887_HW_1_0_VERSION,
@@ -97,6 +98,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.spectral_bin_discard = 0,
 		.vht160_mcs_rx_highest = 0,
 		.vht160_mcs_tx_highest = 0,
+		.n_cipher_suites = 8,
 	},
 	{
 		.id = QCA6174_HW_2_1_VERSION,
@@ -119,6 +121,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.spectral_bin_discard = 0,
 		.vht160_mcs_rx_highest = 0,
 		.vht160_mcs_tx_highest = 0,
+		.n_cipher_suites = 8,
 	},
 	{
 		.id = QCA6174_HW_2_1_VERSION,
@@ -141,6 +144,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.spectral_bin_discard = 0,
 		.vht160_mcs_rx_highest = 0,
 		.vht160_mcs_tx_highest = 0,
+		.n_cipher_suites = 8,
 	},
 	{
 		.id = QCA6174_HW_3_0_VERSION,
@@ -163,6 +167,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.spectral_bin_discard = 0,
 		.vht160_mcs_rx_highest = 0,
 		.vht160_mcs_tx_highest = 0,
+		.n_cipher_suites = 8,
 	},
 	{
 		.id = QCA6174_HW_3_2_VERSION,
@@ -188,6 +193,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.spectral_bin_discard = 0,
 		.vht160_mcs_rx_highest = 0,
 		.vht160_mcs_tx_highest = 0,
+		.n_cipher_suites = 8,
 	},
 	{
 		.id = QCA99X0_HW_2_0_DEV_VERSION,
@@ -216,6 +222,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.spectral_bin_discard = 4,
 		.vht160_mcs_rx_highest = 0,
 		.vht160_mcs_tx_highest = 0,
+		.n_cipher_suites = 11,
 	},
 	{
 		.id = QCA9984_HW_1_0_DEV_VERSION,
@@ -249,6 +256,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		 */
 		.vht160_mcs_rx_highest = 1560,
 		.vht160_mcs_tx_highest = 1560,
+		.n_cipher_suites = 11,
 	},
 	{
 		.id = QCA9888_HW_2_0_DEV_VERSION,
@@ -281,6 +289,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		 */
 		.vht160_mcs_rx_highest = 780,
 		.vht160_mcs_tx_highest = 780,
+		.n_cipher_suites = 11,
 	},
 	{
 		.id = QCA9377_HW_1_0_DEV_VERSION,
@@ -303,6 +312,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.spectral_bin_discard = 0,
 		.vht160_mcs_rx_highest = 0,
 		.vht160_mcs_tx_highest = 0,
+		.n_cipher_suites = 8,
 	},
 	{
 		.id = QCA9377_HW_1_1_DEV_VERSION,
@@ -327,6 +337,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.spectral_bin_discard = 0,
 		.vht160_mcs_rx_highest = 0,
 		.vht160_mcs_tx_highest = 0,
+		.n_cipher_suites = 8,
 	},
 	{
 		.id = QCA4019_HW_1_0_DEV_VERSION,
@@ -356,6 +367,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
 		.spectral_bin_discard = 4,
 		.vht160_mcs_rx_highest = 0,
 		.vht160_mcs_tx_highest = 0,
+		.n_cipher_suites = 11,
 	},
 };
 

drivers/net/wireless/ath/ath10k/hw.h

@@ -550,6 +550,9 @@ struct ath10k_hw_params {
 	 */
 	int vht160_mcs_rx_highest;
 	int vht160_mcs_tx_highest;
+
+	/* Number of ciphers supported (i.e First N) in cipher_suites array */
+	int n_cipher_suites;
 };
 
 struct htt_rx_desc;

drivers/net/wireless/ath/ath10k/mac.c

@@ -242,6 +242,16 @@ static int ath10k_send_key(struct ath10k_vif *arvif,
 	case WLAN_CIPHER_SUITE_WEP104:
 		arg.key_cipher = WMI_CIPHER_WEP;
 		break;
+	case WLAN_CIPHER_SUITE_CCMP_256:
+		arg.key_cipher = WMI_CIPHER_AES_CCM;
+		break;
+	case WLAN_CIPHER_SUITE_GCMP:
+	case WLAN_CIPHER_SUITE_GCMP_256:
+		arg.key_cipher = WMI_CIPHER_AES_GCM;
+		break;
+	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
+	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
+	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 	case WLAN_CIPHER_SUITE_AES_CMAC:
 		WARN_ON(1);
 		return -EINVAL;
@@ -5723,7 +5733,10 @@ static int ath10k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 	u32 flags2;
 
 	/* this one needs to be done in software */
-	if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
+	if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
+	    key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
+	    key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256 ||
+	    key->cipher == WLAN_CIPHER_SUITE_BIP_CMAC_256)
 		return 1;
 
 	if (arvif->nohwcrypt)
@@ -8074,7 +8087,22 @@ int ath10k_mac_register(struct ath10k *ar)
 		WLAN_CIPHER_SUITE_WEP104,
 		WLAN_CIPHER_SUITE_TKIP,
 		WLAN_CIPHER_SUITE_CCMP,
+
+		/* Do not add hardware supported ciphers before this line.
+		 * Allow software encryption for all chips. Don't forget to
+		 * update n_cipher_suites below.
+		 */
 		WLAN_CIPHER_SUITE_AES_CMAC,
+		WLAN_CIPHER_SUITE_BIP_CMAC_256,
+		WLAN_CIPHER_SUITE_BIP_GMAC_128,
+		WLAN_CIPHER_SUITE_BIP_GMAC_256,
+
+		/* Only QCA99x0 and QCA4019 varients support GCMP-128, GCMP-256
+		 * and CCMP-256 in hardware.
+		 */
+		WLAN_CIPHER_SUITE_GCMP,
+		WLAN_CIPHER_SUITE_GCMP_256,
+		WLAN_CIPHER_SUITE_CCMP_256,
 	};
 	struct ieee80211_supported_band *band;
 	void *channels;
@@ -8318,7 +8346,18 @@ int ath10k_mac_register(struct ath10k *ar)
 	}
 
 	ar->hw->wiphy->cipher_suites = cipher_suites;
-	ar->hw->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
+
+	/* QCA988x and QCA6174 family chips do not support CCMP-256, GCMP-128
+	 * and GCMP-256 ciphers in hardware. Fetch number of ciphers supported
+	 * from chip specific hw_param table.
+	 */
+	if (!ar->hw_params.n_cipher_suites ||
+	    ar->hw_params.n_cipher_suites > ARRAY_SIZE(cipher_suites)) {
+		ath10k_err(ar, "invalid hw_params.n_cipher_suites %d\n",
+			   ar->hw_params.n_cipher_suites);
+		ar->hw_params.n_cipher_suites = 8;
+	}
+	ar->hw->wiphy->n_cipher_suites = ar->hw_params.n_cipher_suites;
 
 	wiphy_ext_feature_set(ar->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 

drivers/net/wireless/ath/ath10k/wmi.h

@@ -4751,6 +4751,7 @@ struct wmi_key_seq_counter {
 #define WMI_CIPHER_WAPI     0x5
 #define WMI_CIPHER_CKIP     0x6
 #define WMI_CIPHER_AES_CMAC 0x7
+#define WMI_CIPHER_AES_GCM  0x8
 
 struct wmi_vdev_install_key_cmd {
 	__le32 vdev_id;