The ath6kl firmware can filter scan results based on rssi. This is
useful to limit hosts wakeups on scheduled scans.
Signed-off-by: Thomas Pedersen <c_tpeder@xxxxxxxxxxxxxxxx>
---
v2:
formatting (Joe)
v3:
validate user values
drivers/net/wireless/ath/ath6kl/cfg80211.c | 19 ++++++++++++++++++-
drivers/net/wireless/ath/ath6kl/core.h | 3 +++
drivers/net/wireless/ath/ath6kl/wmi.c | 18 ++++++++++++++++++
drivers/net/wireless/ath/ath6kl/wmi.h | 10 ++++++++++
4 files changed, 49 insertions(+), 1 deletions(-)
diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index fd7dbd4..1c9435e 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -3211,7 +3211,7 @@ static int ath6kl_cfg80211_sscan_start(struct wiphy *wiphy,
struct ath6kl *ar = ath6kl_priv(dev);
struct ath6kl_vif *vif = netdev_priv(dev);
u16 interval;
- int ret;
+ int ret, rssi_thold;
if (ar->state != ATH6KL_STATE_ON)
return -EIO;
@@ -3244,6 +3244,23 @@ static int ath6kl_cfg80211_sscan_start(struct wiphy *wiphy,
return ret;
}
+ if (test_bit(ATH6KL_FW_CAPABILITY_RSSI_SCAN_THOLD,
+ ar->fw_capabilities)) {
+ if (request->rssi_thold <= NL80211_SCAN_RSSI_THOLD_OFF)
+ rssi_thold = 0;
+ else if (request->rssi_thold < -127)
+ rssi_thold = -127;
+ else
+ rssi_thold = request->rssi_thold;
+
+ ret = ath6kl_wmi_set_rssi_filter_cmd(ar->wmi, vif->fw_vif_idx,
+ rssi_thold);
+ if (ret) {
+ ath6kl_err("failed to set RSSI threshold for scan\n");
+ return ret;
+ }
+ }
+
/* fw uses seconds, also make sure that it's >0 */
interval = max_t(u16, 1, request->interval / 1000);
diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h
index d38a31d..1bce79c 100644
--- a/drivers/net/wireless/ath/ath6kl/core.h
+++ b/drivers/net/wireless/ath/ath6kl/core.h
@@ -115,6 +115,9 @@ enum ath6kl_fw_capability {
*/
ATH6KL_FW_CAPABILITY_SCHED_SCAN_MATCH_LIST,
+ /* Firmware supports filtering BSS results by RSSI */
+ ATH6KL_FW_CAPABILITY_RSSI_SCAN_THOLD,
+
/* this needs to be last */
ATH6KL_FW_CAPABILITY_MAX,
};
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c
index a6caa67..3629e86 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@@ -1531,6 +1531,24 @@ static int ath6kl_wmi_cac_event_rx(struct wmi *wmi, u8 *datap, int len,
return 0;
}
+int ath6kl_wmi_set_rssi_filter_cmd(struct wmi *wmi, u8 if_idx, s8 rssi)
+{
+ struct sk_buff *skb;
+ struct wmi_set_rssi_filter_cmd *cmd;
+ int ret;
+
+ skb = ath6kl_wmi_get_new_buf(sizeof(*cmd));
+ if (!skb)
+ return -ENOMEM;
+
+ cmd = (struct wmi_set_rssi_filter_cmd *) skb->data;
+ cmd->rssi = rssi;
+
+ ret = ath6kl_wmi_cmd_send(wmi, if_idx, skb, WMI_SET_RSSI_FILTER_CMDID,
+ NO_SYNC_WMIFLAG);
+ return ret;
+}
+
static int ath6kl_wmi_send_snr_threshold_params(struct wmi *wmi,
struct wmi_snr_threshold_params_cmd *snr_cmd)
{
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index 43339ac..b5deaff 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -628,6 +628,10 @@ enum wmi_cmd_id {
WMI_SET_MCASTRATE,
WMI_STA_BMISS_ENHANCE_CMDID,
+
+ WMI_SET_REGDOMAIN_CMDID,
+
+ WMI_SET_RSSI_FILTER_CMDID,
};
enum wmi_mgmt_frame_type {
@@ -1276,6 +1280,11 @@ struct wmi_snr_threshold_params_cmd {
u8 reserved[3];
} __packed;
+/* Don't report BSSs with signal (RSSI) below this threshold */
+struct wmi_set_rssi_filter_cmd {
+ s8 rssi;
+} __packed;
+
enum wmi_preamble_policy {
WMI_IGNORE_BARKER_IN_ERP = 0,
WMI_FOLLOW_BARKER_IN_ERP,
@@ -2592,6 +2601,7 @@ int ath6kl_wmi_add_wow_pattern_cmd(struct wmi *wmi, u8 if_idx,
const u8 *mask);
int ath6kl_wmi_del_wow_pattern_cmd(struct wmi *wmi, u8 if_idx,
u16 list_id, u16 filter_id);
+int ath6kl_wmi_set_rssi_filter_cmd(struct wmi *wmi, u8 if_idx, s8 rssi);
int ath6kl_wmi_set_roam_lrssi_cmd(struct wmi *wmi, u8 lrssi);
int ath6kl_wmi_ap_set_dtim_cmd(struct wmi *wmi, u8 if_idx, u32 dtim_period);
int ath6kl_wmi_force_roam_cmd(struct wmi *wmi, const u8 *bssid);
--
1.7.4.1
--
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