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wcn36xx: Add GTK offload to WoWLAN path

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Using previously set GTK KCK and KEK material this commit adds GTK rekeying
to the WoWLAN suspend/resume path. A small error in the packing of the
up to now unused command structure is fixed as we go.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Tested-by: Benjamin Li <benl@squareup.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210605011140.2004643-9-bryan.odonoghue@linaro.org
This commit is contained in:
Bryan O'Donoghue 2021-06-05 02:11:36 +01:00 committed by Kalle Valo
parent 8974e5917b
commit 6693f7675c
4 changed files with 47 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/net/wireless/ath/wcn36xx/hal.h
View file

@ -4905,7 +4905,7 @@ struct wcn36xx_hal_gtk_offload_req_msg {
u64 key_replay_counter;
u8 bss_index;
};
} __packed;
struct wcn36xx_hal_gtk_offload_rsp_msg {
struct wcn36xx_hal_msg_header header;

4
drivers/net/wireless/ath/wcn36xx/main.c
View file

@ -1119,6 +1119,9 @@ static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)
if (ret)
goto out;
ret = wcn36xx_smd_ipv6_ns_offload(wcn, vif, true);
if (ret)
goto out;
ret = wcn36xx_smd_gtk_offload(wcn, vif, true);
if (ret)
goto out;
ret = wcn36xx_smd_set_power_params(wcn, true);
@ -1139,6 +1142,7 @@ static int wcn36xx_resume(struct ieee80211_hw *hw)
vif = wcn36xx_get_first_assoc_vif(wcn);
if (vif) {
wcn36xx_smd_set_power_params(wcn, false);
wcn36xx_smd_gtk_offload(wcn, vif, false);
wcn36xx_smd_ipv6_ns_offload(wcn, vif, false);
wcn36xx_smd_arp_offload(wcn, vif, false);
}

39
drivers/net/wireless/ath/wcn36xx/smd.c
View file

@ -2856,6 +2856,44 @@ int wcn36xx_smd_ipv6_ns_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
}
#endif
int wcn36xx_smd_gtk_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
bool enable)
{
struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
struct wcn36xx_hal_gtk_offload_req_msg msg_body;
int ret;
mutex_lock(&wcn->hal_mutex);
INIT_HAL_MSG(msg_body, WCN36XX_HAL_GTK_OFFLOAD_REQ);
if (enable) {
memcpy(&msg_body.kek, vif_priv->rekey_data.kek, NL80211_KEK_LEN);
memcpy(&msg_body.kck, vif_priv->rekey_data.kck, NL80211_KCK_LEN);
msg_body.key_replay_counter =
le64_to_cpu(vif_priv->rekey_data.replay_ctr);
msg_body.bss_index = vif_priv->bss_index;
} else {
msg_body.flags = WCN36XX_HAL_GTK_OFFLOAD_FLAGS_DISABLE;
}
PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
ret = wcn36xx_smd_send_and_wait(wcn, msg_body.header.len);
if (ret) {
wcn36xx_err("Sending host_offload_arp failed\n");
goto out;
}
ret = wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len);
if (ret) {
wcn36xx_err("host_offload_arp failed err=%d\n", ret);
goto out;
}
out:
mutex_unlock(&wcn->hal_mutex);
return ret;
}
int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
void *buf, int len, void *priv, u32 addr)
{
@ -2905,6 +2943,7 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
case WCN36XX_HAL_START_SCAN_OFFLOAD_RSP:
case WCN36XX_HAL_STOP_SCAN_OFFLOAD_RSP:
case WCN36XX_HAL_HOST_OFFLOAD_RSP:
case WCN36XX_HAL_GTK_OFFLOAD_RSP:
memcpy(wcn->hal_buf, buf, len);
wcn->hal_rsp_len = len;
complete(&wcn->hal_rsp_compl);

3
drivers/net/wireless/ath/wcn36xx/smd.h
View file

@ -153,4 +153,7 @@ int wcn36xx_smd_arp_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
int wcn36xx_smd_ipv6_ns_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
bool enable);
int wcn36xx_smd_gtk_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
bool enable);
#endif /* _SMD_H_ */