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ath6kl: support rssi threshold for sched scan 

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@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Thomas Pedersen 2012-06-21 12:50:08 -07:00 committed by Kalle Valo
parent 9b34f40c20
commit 85b20fc242
4 changed files with 49 additions and 1 deletions
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19
drivers/net/wireless/ath/ath6kl/cfg80211.c
View File

@ -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);

3
drivers/net/wireless/ath/ath6kl/core.h
View File

@ -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,
};

18
drivers/net/wireless/ath/ath6kl/wmi.c
View File

@ -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)
{

10
drivers/net/wireless/ath/ath6kl/wmi.h
View File

@ -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);