[PATCH 1/2] ath10k: add cryptmode param to support sw crypto and raw tx injection.
David Liu
cfliu.tw at gmail.com
Mon Jun 1 12:44:03 PDT 2015
This change supports bypassing HW crypto engine by enabling raw Rx/Tx mode.
This will enable use cases such as sw crypto and raw tx injection.
This change introduces a new module param 'cryptmode'.
cryptmode:
0 Use HW crypto engine. Use native WiFi mode Tx/Rx encap
1 Use SW crypto engine. Use raw mode Tx/Rx encap
2 Supports both SW & HW crypto engine. Use raw mode Tx/Rx encap.
Testing: used QCA988x hw 2.0 with 10.2 firmware.
ath10k
cryptmode
param Testing Status
------- ---------------------------------
0 HW CCMP/TKIP tested ok.
Note: HW crypto bypass not supported by ath10k hw in native WiFi
mode.
1 - mac80211 SW crypto tested ok. (Req. mac80211 change)
- raw Tx frame injection tested ok.
2 HW CCMP/TKIP tested ok.
- BSS 1 tested HW CCMP/TKIP ok.
- BSS 2 can bypass HW engine.
- Tested mac80211 cam do SW crypto. (Req. mac80211 change)
- Tested raw Tx encrypted frame injection.
Signed-off-by: David Liu <cfliu.tw at gmail.com>
---
drivers/net/wireless/ath/ath10k/core.c | 17 +++++++++
drivers/net/wireless/ath/ath10k/core.h | 24 ++++++++++++-
drivers/net/wireless/ath/ath10k/htt_rx.c | 3 +-
drivers/net/wireless/ath/ath10k/htt_tx.c | 3 ++
drivers/net/wireless/ath/ath10k/hw.h | 2 +-
drivers/net/wireless/ath/ath10k/mac.c | 61 +++++++++++++++++++++++++++-----
drivers/net/wireless/ath/ath10k/wmi.c | 6 ++--
7 files changed, 102 insertions(+), 14 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 59496a9..e91fc85 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -31,16 +31,19 @@
#include "wmi-ops.h"
unsigned int ath10k_debug_mask;
+bool ath10k_cryptmode_param;
static bool uart_print;
static bool skip_otp;
module_param_named(debug_mask, ath10k_debug_mask, uint, 0644);
+module_param_named(cryptmode, ath10k_cryptmode_param, bool, 0644);
module_param(uart_print, bool, 0644);
module_param(skip_otp, bool, 0644);
MODULE_PARM_DESC(debug_mask, "Debugging mask");
MODULE_PARM_DESC(uart_print, "Uart target debugging");
MODULE_PARM_DESC(skip_otp, "Skip otp failure for calibration in testmode");
+MODULE_PARM_DESC(cryptmode, "Crypto mode - 0: HW only, 1: SW only, 2:Both");
static const struct ath10k_hw_params ath10k_hw_params_list[] = {
{
@@ -991,6 +994,20 @@ static int ath10k_core_init_firmware_features(struct ath10k *ar)
return -EINVAL;
}
+ if (ath10k_cryptmode_param == ATH10K_CRYPT_MODE_HW) {
+ clear_bit(ATH10K_RAW_MODE, &ar->dev_flags);
+ clear_bit(ATH10K_HW_CRYPTO_DISABLED, &ar->dev_flags);
+ } else {
+ if (!test_bit(ATH10K_FW_FEATURE_RAW_MODE_SUPPORT,
+ ar->fw_features)) {
+ ath10k_err(ar, "cryptmode > 0 requires raw mode support from firmware");
+ return -EINVAL;
+ }
+ set_bit(ATH10K_RAW_MODE, &ar->dev_flags);
+ if (ath10k_cryptmode_param == ATH10K_CRYPT_MODE_SW)
+ set_bit(ATH10K_HW_CRYPTO_DISABLED, &ar->dev_flags);
+ }
+
/* Backwards compatibility for firmwares without
* ATH10K_FW_IE_WMI_OP_VERSION.
*/
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 45f9603..13799c8 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -91,6 +91,7 @@ struct ath10k_skb_cb {
u8 tid;
u16 freq;
bool is_offchan;
+ bool nohwcrypt;
struct ath10k_htt_txbuf *txbuf;
u32 txbuf_paddr;
} __packed htt;
@@ -349,6 +350,7 @@ struct ath10k_vif {
} u;
bool use_cts_prot;
+ bool nohwcrypt;
int num_legacy_stations;
int txpower;
struct wmi_wmm_params_all_arg wmm_params;
@@ -461,7 +463,12 @@ enum ath10k_fw_features {
ATH10K_FW_FEATURE_WOWLAN_SUPPORT = 6,
/* Don't trust error code from otp.bin */
- ATH10K_FW_FEATURE_IGNORE_OTP_RESULT,
+ ATH10K_FW_FEATURE_IGNORE_OTP_RESULT = 7,
+
+ /* Raw mode support. If supported, FW supports receiving and trasmitting
+ * frames in raw mode
+ */
+ ATH10K_FW_FEATURE_RAW_MODE_SUPPORT = 8,
/* Some firmware revisions pad 4th hw address to 4 byte boundary making
* it 8 bytes long in Native Wifi Rx decap.
@@ -484,6 +491,12 @@ enum ath10k_dev_flags {
* waiters should immediately cancel instead of waiting for a time out.
*/
ATH10K_FLAG_CRASH_FLUSH,
+
+ /* Use Raw mode for Tx and Rx */
+ ATH10K_RAW_MODE,
+
+ /* Disable HW crypto engine */
+ ATH10K_HW_CRYPTO_DISABLED,
};
enum ath10k_cal_mode {
@@ -492,6 +505,15 @@ enum ath10k_cal_mode {
ATH10K_CAL_MODE_DT,
};
+enum ath10k_crypt_mode {
+ /* Use HW crypto engine only */
+ ATH10K_CRYPT_MODE_HW,
+ /* HW SW crypto engine only (ie. HW crypto engine disabled) */
+ ATH10K_CRYPT_MODE_SW,
+ /* Both SW & HW crypto engine supported */
+ ATH10K_CRYPT_MODE_HW_SW,
+};
+
static inline const char *ath10k_cal_mode_str(enum ath10k_cal_mode mode)
{
switch (mode) {
diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 89eb16b..a7df05d 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -1018,8 +1018,7 @@ static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar,
/* In most cases this will be true for sniffed frames. It makes sense
* to deliver them as-is without stripping the crypto param. This would
- * also make sense for software based decryption (which is not
- * implemented in ath10k).
+ * also make sense for software based decryption.
*
* If there's no error then the frame is decrypted. At least that is
* the case for frames that come in via fragmented rx indication.
diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index a60ef7d..18446d9 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -508,6 +508,9 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
prefetch_len);
skb_cb->htt.txbuf->htc_hdr.flags = 0;
+ if (skb_cb->htt.nohwcrypt)
+ flags0 |= HTT_DATA_TX_DESC_FLAGS0_NO_ENCRYPT;
+
if (!skb_cb->is_protected)
flags0 |= HTT_DATA_TX_DESC_FLAGS0_NO_ENCRYPT;
diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 85cca29..37fd2f83 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -296,7 +296,7 @@ enum ath10k_hw_rate_cck {
#define TARGET_10X_RX_SKIP_DEFRAG_TIMEOUT_DUP_DETECTION_CHECK 1
#define TARGET_10X_VOW_CONFIG 0
#define TARGET_10X_NUM_MSDU_DESC (1024 + 400)
-#define TARGET_10X_MAX_FRAG_ENTRIES 0
+#define TARGET_10X_MAX_FRAG_ENTRIES 10
/* 10.2 parameters */
#define TARGET_10_2_DMA_BURST_SIZE 1
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index f4de717..d83e933 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -172,6 +172,7 @@ static int ath10k_send_key(struct ath10k_vif *arvif,
.key_flags = flags,
.macaddr = macaddr,
};
+ int ret;
lockdep_assert_held(&arvif->ar->conf_mutex);
@@ -184,6 +185,9 @@ static int ath10k_send_key(struct ath10k_vif *arvif,
arg.key_cipher = WMI_CIPHER_TKIP;
arg.key_txmic_len = 8;
arg.key_rxmic_len = 8;
+ if (test_bit(ATH10K_RAW_MODE, &ar->dev_flags))
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
+
break;
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
@@ -197,12 +201,24 @@ static int ath10k_send_key(struct ath10k_vif *arvif,
return -EOPNOTSUPP;
}
+ if (test_bit(ATH10K_RAW_MODE, &ar->dev_flags)) {
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+ key->flags |= IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
+ }
+
+ if (arvif->nohwcrypt)
+ cmd = DISABLE_KEY;
+
if (cmd == DISABLE_KEY) {
arg.key_cipher = WMI_CIPHER_NONE;
arg.key_data = NULL;
}
- return ath10k_wmi_vdev_install_key(arvif->ar, &arg);
+ ret = ath10k_wmi_vdev_install_key(arvif->ar, &arg);
+
+ if (arvif->nohwcrypt && !ret)
+ return -EOPNOTSUPP;
+ return ret;
}
static int ath10k_install_key(struct ath10k_vif *arvif,
@@ -3172,9 +3188,24 @@ ath10k_tx_h_get_txmode(struct ath10k *ar, struct ieee80211_vif *vif,
if (ieee80211_is_data_present(fc) && sta && sta->tdls)
return ATH10K_HW_TXRX_ETHERNET;
+ if (test_bit(ATH10K_RAW_MODE, &ar->dev_flags))
+ return ATH10K_HW_TXRX_RAW;
+
return ATH10K_HW_TXRX_NATIVE_WIFI;
}
+static bool ath10k_tx_h_use_hwcrypto(struct ieee80211_vif *vif,
+ struct sk_buff *skb) {
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ const u32 mask = IEEE80211_TX_INTFL_DONT_ENCRYPT |
+ IEEE80211_TX_CTL_INJECTED;
+ if ((info->flags & mask) == mask)
+ return false;
+ if (vif)
+ return !ath10k_vif_to_arvif(vif)->nohwcrypt;
+ return true;
+}
+
/* HTT Tx uses Native Wifi tx mode which expects 802.11 frames without QoS
* Control in the header.
*/
@@ -3620,6 +3651,7 @@ static void ath10k_tx(struct ieee80211_hw *hw,
ATH10K_SKB_CB(skb)->htt.is_offchan = false;
ATH10K_SKB_CB(skb)->htt.freq = 0;
ATH10K_SKB_CB(skb)->htt.tid = ath10k_tx_h_get_tid(hdr);
+ ATH10K_SKB_CB(skb)->htt.nohwcrypt = !ath10k_tx_h_use_hwcrypto(vif, skb);
ATH10K_SKB_CB(skb)->vdev_id = ath10k_tx_h_get_vdev_id(ar, vif);
ATH10K_SKB_CB(skb)->txmode = ath10k_tx_h_get_txmode(ar, vif, sta, skb);
ATH10K_SKB_CB(skb)->is_protected = ieee80211_has_protected(fc);
@@ -3635,12 +3667,11 @@ static void ath10k_tx(struct ieee80211_hw *hw,
ath10k_tx_h_8023(skb);
break;
case ATH10K_HW_TXRX_RAW:
- /* FIXME: Packet injection isn't implemented. It should be
- * doable with firmware 10.2 on qca988x.
- */
- WARN_ON_ONCE(1);
- ieee80211_free_txskb(hw, skb);
- return;
+ if (!test_bit(ATH10K_RAW_MODE, &ar->dev_flags)) {
+ WARN_ON_ONCE(1);
+ ieee80211_free_txskb(hw, skb);
+ return;
+ }
}
if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) {
@@ -4134,6 +4165,7 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
int bit;
int i;
u32 vdev_param;
+ u32 param_value;
vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
@@ -4236,6 +4268,13 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
goto err;
}
}
+ if (test_bit(ATH10K_HW_CRYPTO_DISABLED, &ar->dev_flags))
+ arvif->nohwcrypt = true;
+
+ if (arvif->nohwcrypt && !test_bit(ATH10K_RAW_MODE, &ar->dev_flags)) {
+ ath10k_warn(ar, "cryptmode module param needed for sw crypto\n");
+ goto err;
+ }
ath10k_dbg(ar, ATH10K_DBG_MAC, "mac vdev create %d (add interface) type %d subtype %d bcnmode %s\n",
arvif->vdev_id, arvif->vdev_type, arvif->vdev_subtype,
@@ -4265,8 +4304,14 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
arvif->def_wep_key_idx = -1;
vdev_param = ar->wmi.vdev_param->tx_encap_type;
+ if (test_bit(ATH10K_RAW_MODE, &ar->dev_flags))
+ param_value = ATH10K_HW_TXRX_RAW;
+ else
+ param_value = ATH10K_HW_TXRX_NATIVE_WIFI;
+
ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
- ATH10K_HW_TXRX_NATIVE_WIFI);
+ param_value);
+
/* 10.X firmware does not support this VDEV parameter. Do not warn */
if (ret && ret != -EOPNOTSUPP) {
ath10k_warn(ar, "failed to set vdev %i TX encapsulation: %d\n",
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index 77220b0..1202150 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -508,7 +508,7 @@ static struct wmi_vdev_param_map wmi_10x_vdev_param_map = {
.txbf = WMI_VDEV_PARAM_UNSUPPORTED,
.packet_powersave = WMI_VDEV_PARAM_UNSUPPORTED,
.drop_unencry = WMI_VDEV_PARAM_UNSUPPORTED,
- .tx_encap_type = WMI_VDEV_PARAM_UNSUPPORTED,
+ .tx_encap_type = WMI_10X_VDEV_PARAM_TX_ENCAP_TYPE,
.ap_detect_out_of_sync_sleeping_sta_time_secs =
WMI_10X_VDEV_PARAM_AP_DETECT_OUT_OF_SYNC_SLEEPING_STA_TIME_SECS,
};
@@ -3894,7 +3894,9 @@ static struct sk_buff *ath10k_wmi_10_2_op_gen_init(struct ath10k *ar)
config.rx_timeout_pri_vi = __cpu_to_le32(TARGET_10X_RX_TIMEOUT_LO_PRI);
config.rx_timeout_pri_be = __cpu_to_le32(TARGET_10X_RX_TIMEOUT_LO_PRI);
config.rx_timeout_pri_bk = __cpu_to_le32(TARGET_10X_RX_TIMEOUT_HI_PRI);
- config.rx_decap_mode = __cpu_to_le32(TARGET_10X_RX_DECAP_MODE);
+ config.rx_decap_mode = __cpu_to_le32(ATH10K_HW_TXRX_NATIVE_WIFI);
+ if (test_bit(ATH10K_RAW_MODE, &ar->dev_flags))
+ config.rx_decap_mode = __cpu_to_le32(ATH10K_HW_TXRX_RAW);
config.scan_max_pending_reqs =
__cpu_to_le32(TARGET_10X_SCAN_MAX_PENDING_REQS);
--
2.1.4
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