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wcn36xx: Add GTK offload info to WoWLAN resume

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Having enabled GTK rekey in suspend, we need to extract the replay counter
from the firmware on resume and perform a ieee80211_gtk_rekey_notify() so
that the STA remains verified from the perspective of the AP.

In order to enable the SMD command and response we need to pack the
existing command/response structures. Given these structures are currently
unused, there's no need to backport this as a fix.

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/20210605011140.2004643-10-bryan.odonoghue@linaro.org
This commit is contained in:
Bryan O'Donoghue
2021-06-05 02:11:37 +01:00
committed by Kalle Valo
parent 6693f7675c
commit bedf1169bc
4 changed files with 79 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/wireless/ath/wcn36xx/hal.h
View File

@@ -4919,7 +4919,7 @@ struct wcn36xx_hal_gtk_offload_rsp_msg {
struct wcn36xx_hal_gtk_offload_get_info_req_msg {
struct wcn36xx_hal_msg_header header;
u8 bss_index;
};
} __packed;
struct wcn36xx_hal_gtk_offload_get_info_rsp_msg {
struct wcn36xx_hal_msg_header header;
@@ -4943,7 +4943,7 @@ struct wcn36xx_hal_gtk_offload_get_info_rsp_msg {
u32 igtk_rekey_count;
u8 bss_index;
};
} __packed;
struct dhcp_info {
/* Indicates the device mode which indicates about the DHCP activity */

1
drivers/net/wireless/ath/wcn36xx/main.c
View File

@@ -1142,6 +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_get_info(wcn, vif);
wcn36xx_smd_gtk_offload(wcn, vif, false);
wcn36xx_smd_ipv6_ns_offload(wcn, vif, false);
wcn36xx_smd_arp_offload(wcn, vif, false);

73
drivers/net/wireless/ath/wcn36xx/smd.c
View File

@@ -2894,6 +2894,78 @@ int wcn36xx_smd_gtk_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
return ret;
}
static int wcn36xx_smd_gtk_offload_get_info_rsp(struct wcn36xx *wcn,
struct ieee80211_vif *vif)
{
struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
struct wcn36xx_hal_gtk_offload_get_info_rsp_msg *rsp;
__be64 replay_ctr;
if (wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len))
return -EIO;
rsp = (struct wcn36xx_hal_gtk_offload_get_info_rsp_msg *)wcn->hal_buf;
if (rsp->bss_index != vif_priv->bss_index) {
wcn36xx_err("gtk_offload_info invalid response bss index %d\n",
rsp->bss_index);
return -ENOENT;
}
if (vif_priv->rekey_data.replay_ctr != cpu_to_le64(rsp->key_replay_counter)) {
replay_ctr = cpu_to_be64(rsp->key_replay_counter);
vif_priv->rekey_data.replay_ctr =
cpu_to_le64(rsp->key_replay_counter);
ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
(void *)&replay_ctr, GFP_KERNEL);
wcn36xx_dbg(WCN36XX_DBG_HAL,
"GTK replay counter increment %llu\n",
rsp->key_replay_counter);
}
wcn36xx_dbg(WCN36XX_DBG_HAL,
"gtk offload info status %d last_rekey_status %d "
"replay_counter %llu total_rekey_count %d gtk_rekey_count %d "
"igtk_rekey_count %d bss_index %d\n",
rsp->status, rsp->last_rekey_status,
rsp->key_replay_counter, rsp->total_rekey_count,
rsp->gtk_rekey_count, rsp->igtk_rekey_count,
rsp->bss_index);
return 0;
}
int wcn36xx_smd_gtk_offload_get_info(struct wcn36xx *wcn,
struct ieee80211_vif *vif)
{
struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
struct wcn36xx_hal_gtk_offload_get_info_req_msg msg_body;
int ret;
mutex_lock(&wcn->hal_mutex);
INIT_HAL_MSG(msg_body, WCN36XX_HAL_GTK_OFFLOAD_GETINFO_REQ);
msg_body.bss_index = vif_priv->bss_index;
PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
ret = wcn36xx_smd_send_and_wait(wcn, msg_body.header.len);
if (ret) {
wcn36xx_err("Sending gtk_offload_get_info failed\n");
goto out;
}
ret = wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len);
if (ret) {
wcn36xx_err("gtk_offload_get_info failed err=%d\n", ret);
goto out;
}
ret = wcn36xx_smd_gtk_offload_get_info_rsp(wcn, vif);
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)
{
@@ -2944,6 +3016,7 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
case WCN36XX_HAL_STOP_SCAN_OFFLOAD_RSP:
case WCN36XX_HAL_HOST_OFFLOAD_RSP:
case WCN36XX_HAL_GTK_OFFLOAD_RSP:
case WCN36XX_HAL_GTK_OFFLOAD_GETINFO_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

@@ -156,4 +156,7 @@ int wcn36xx_smd_ipv6_ns_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
int wcn36xx_smd_gtk_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
bool enable);
int wcn36xx_smd_gtk_offload_get_info(struct wcn36xx *wcn,
struct ieee80211_vif *vif);
#endif /* _SMD_H_ */