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ath11k: enable PN offload

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Enabling PN checking in the hardware; hardware checks
the PN of the received packets and reports the errors
to the host for further handling; default action is to
drop such packets. TSC (TKIP sequence counter)
validation is also offloaded.

Hardware validates PN/TSC only for unicast packets;
for group addressed packets, PN validation is done
in mac80211.

PN errors are reported to the driver via WBM RX release
ring and can be dumped by using the following command.

"cat /sys/kernel/debug/ath11k/soc_rx_stats | grep -i pn"

Sample Output:
PN check fail: 210

Signed-off-by: Manikanta Pubbisetty <mpubbise@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Manikanta Pubbisetty
2020-03-16 07:37:22 +02:00
committed by Kalle Valo
parent 243874c64c
commit 1441b2f205
7 changed files with 156 additions and 14 deletions
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27
drivers/net/wireless/ath/ath11k/mac.c
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@@ -2325,6 +2325,7 @@ static int ath11k_mac_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
struct ath11k_base *ab = ar->ab;
struct ath11k_vif *arvif = ath11k_vif_to_arvif(vif);
struct ath11k_peer *peer;
struct ath11k_sta *arsta;
const u8 *peer_addr;
int ret = 0;
u32 flags = 0;
@@ -2382,6 +2383,12 @@ static int ath11k_mac_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
goto exit;
}
ret = ath11k_dp_peer_rx_pn_replay_config(arvif, peer_addr, cmd, key);
if (ret) {
ath11k_warn(ab, "failed to offload PN replay detection %d\n", ret);
goto exit;
}
spin_lock_bh(&ab->base_lock);
peer = ath11k_peer_find(ab, arvif->vdev_id, peer_addr);
if (peer && cmd == SET_KEY) {
@@ -2399,6 +2406,26 @@ static int ath11k_mac_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
} else if (!peer)
/* impossible unless FW goes crazy */
ath11k_warn(ab, "peer %pM disappeared!\n", peer_addr);
if (sta) {
arsta = (struct ath11k_sta *)sta->drv_priv;
switch (key->cipher) {
case WLAN_CIPHER_SUITE_TKIP:
case WLAN_CIPHER_SUITE_CCMP:
case WLAN_CIPHER_SUITE_CCMP_256:
case WLAN_CIPHER_SUITE_GCMP:
case WLAN_CIPHER_SUITE_GCMP_256:
if (cmd == SET_KEY)
arsta->pn_type = HAL_PN_TYPE_WPA;
else
arsta->pn_type = HAL_PN_TYPE_NONE;
break;
default:
arsta->pn_type = HAL_PN_TYPE_NONE;
break;
}
}
spin_unlock_bh(&ab->base_lock);
exit: