wcn36xx: Add set_rekey_data callback

Add a callback for Group Temporal Key tracking as provided by the standard
WiFi ops structure.

We track the key to integrate GTK offloading into the WoWLAN suspend path
later on. Code comes from the Intel iwlwifi driver with minimal name
changes.

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/20210605011140.2004643-8-bryan.odonoghue@linaro.org

diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index 09e22f8296823b59aaf62c5b61537099dcf62bad..ec32b8b0067d60d87a506cc797f53ee9e83d8015 100644 (file)
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1147,6 +1147,24 @@ static int wcn36xx_resume(struct ieee80211_hw *hw)
        return 0;
 }
 
+static void wcn36xx_set_rekey_data(struct ieee80211_hw *hw,
+                                  struct ieee80211_vif *vif,
+                                  struct cfg80211_gtk_rekey_data *data)
+{
+       struct wcn36xx *wcn = hw->priv;
+       struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+
+       mutex_lock(&wcn->conf_mutex);
+
+       memcpy(vif_priv->rekey_data.kek, data->kek, NL80211_KEK_LEN);
+       memcpy(vif_priv->rekey_data.kck, data->kck, NL80211_KCK_LEN);
+       vif_priv->rekey_data.replay_ctr =
+               cpu_to_le64(be64_to_cpup((__be64 *)data->replay_ctr));
+       vif_priv->rekey_data.valid = true;
+
+       mutex_unlock(&wcn->conf_mutex);
+}
+
 #endif
 
 static int wcn36xx_ampdu_action(struct ieee80211_hw *hw,
@@ -1249,6 +1267,7 @@ static const struct ieee80211_ops wcn36xx_ops = {
 #ifdef CONFIG_PM
        .suspend                = wcn36xx_suspend,
        .resume                 = wcn36xx_resume,
+       .set_rekey_data         = wcn36xx_set_rekey_data,
 #endif
        .config                 = wcn36xx_config,
        .prepare_multicast      = wcn36xx_prepare_multicast,

diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
index 5a5114660b1863b393bac7cfd5ab704c8cf3398e..6121d8a5641ab83736291989851e12bb23e86b22 100644 (file)
--- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
+++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
@@ -143,6 +143,12 @@ struct wcn36xx_vif {
        unsigned long tentative_addrs[BITS_TO_LONGS(WCN36XX_HAL_IPV6_OFFLOAD_ADDR_MAX)];
        int num_target_ipv6_addrs;
 #endif
+       /* WoWLAN GTK rekey data */
+       struct {
+               u8 kck[NL80211_KCK_LEN], kek[NL80211_KEK_LEN];
+               __le64 replay_ctr;
+               bool valid;
+       } rekey_data;
 
        struct list_head sta_list;
 };