cfg80211: support TX error rate CQM

Let the user configure serveral TX error conection quality monitoring
parameters: % error rate, survey interval, and # of attempted packets.

On exceeding the TX failure rate over the given interval, the driver
will send a CQM notify event with the actual TX failure rate and
packets attempted.

Signed-off-by: Thomas Pedersen <c_tpeder@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

2 files changed, 37 insertions, 0 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index e791487ead37..d6cfacc3ce4d 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1550,6 +1550,8 @@ enum nl80211_attrs {
 /* default RSSI threshold for scan results if none specified. */
 #define NL80211_SCAN_RSSI_THOLD_OFF             -300
 
+#define NL80211_CQM_TXE_MAX_INTVL               1800
+
 /**
  * enum nl80211_iftype - (virtual) interface types
  *
@@ -2589,6 +2591,17 @@ enum nl80211_ps_state {
  * @NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT: RSSI threshold event
  * @NL80211_ATTR_CQM_PKT_LOSS_EVENT: a u32 value indicating that this many
  *      consecutive packets were not acknowledged by the peer
+ * @NL80211_ATTR_CQM_TXE_RATE: TX error rate in %. Minimum % of TX failures
+ *      during the given %NL80211_ATTR_CQM_TXE_INTVL before an
+ *      %NL80211_CMD_NOTIFY_CQM with reported %NL80211_ATTR_CQM_TXE_RATE and
+ *      %NL80211_ATTR_CQM_TXE_PKTS is generated.
+ * @NL80211_ATTR_CQM_TXE_PKTS: number of attempted packets in a given
+ *      %NL80211_ATTR_CQM_TXE_INTVL before %NL80211_ATTR_CQM_TXE_RATE is
+ *      checked.
+ * @NL80211_ATTR_CQM_TXE_INTVL: interval in seconds. Specifies the periodic
+ *      interval in which %NL80211_ATTR_CQM_TXE_PKTS and
+ *      %NL80211_ATTR_CQM_TXE_RATE must be satisfied before generating an
+ *      %NL80211_CMD_NOTIFY_CQM. Set to 0 to turn off TX error reporting.
  * @__NL80211_ATTR_CQM_AFTER_LAST: internal
  * @NL80211_ATTR_CQM_MAX: highest key attribute
  */
@@ -2598,6 +2611,9 @@ enum nl80211_attr_cqm {
         NL80211_ATTR_CQM_RSSI_HYST,
         NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
         NL80211_ATTR_CQM_PKT_LOSS_EVENT,
+        NL80211_ATTR_CQM_TXE_RATE,
+        NL80211_ATTR_CQM_TXE_PKTS,
+        NL80211_ATTR_CQM_TXE_INTVL,
 
         /* keep last */
         __NL80211_ATTR_CQM_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 0245208c2978..493fa0c79005 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1573,6 +1573,8 @@ struct cfg80211_gtk_rekey_data {
  * @set_power_mgmt: Configure WLAN power management. A timeout value of -1
  *      allows the driver to adjust the dynamic ps timeout value.
  * @set_cqm_rssi_config: Configure connection quality monitor RSSI threshold.
+ * @set_cqm_txe_config: Configure connection quality monitor TX error
+ *      thresholds.
  * @sched_scan_start: Tell the driver to start a scheduled scan.
  * @sched_scan_stop: Tell the driver to stop an ongoing scheduled
  *      scan.  The driver_initiated flag specifies whether the driver
@@ -1783,6 +1785,10 @@ struct cfg80211_ops {
                                        struct net_device *dev,
                                        s32 rssi_thold, u32 rssi_hyst);
 
+        int     (*set_cqm_txe_config)(struct wiphy *wiphy,
+                                      struct net_device *dev,
+                                      u32 rate, u32 pkts, u32 intvl);
+
         void    (*mgmt_frame_register)(struct wiphy *wiphy,
                                        struct wireless_dev *wdev,
                                        u16 frame_type, bool reg);
@@ -3396,6 +3402,21 @@ void cfg80211_cqm_pktloss_notify(struct net_device *dev,
                                  const u8 *peer, u32 num_packets, gfp_t gfp);
 
 /**
+ * cfg80211_cqm_txe_notify - TX error rate event
+ * @dev: network device
+ * @peer: peer's MAC address
+ * @num_packets: how many packets were lost
+ * @rate: % of packets which failed transmission
+ * @intvl: interval (in s) over which the TX failure threshold was breached.
+ * @gfp: context flags
+ *
+ * Notify userspace when configured % TX failures over number of packets in a
+ * given interval is exceeded.
+ */
+void cfg80211_cqm_txe_notify(struct net_device *dev, const u8 *peer,
+                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp);
+
+/**
  * cfg80211_gtk_rekey_notify - notify userspace about driver rekeying
  * @dev: network device
  * @bssid: BSSID of AP (to avoid races)