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>

1 files changed, 85 insertions, 0 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index be8750f91d7..9216e45e53a 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -6267,8 +6267,35 @@ nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
+        [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
+        [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
+        [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
 };
 
+static int nl80211_set_cqm_txe(struct genl_info *info,
+                                u32 rate, u32 pkts, u32 intvl)
+{
+        struct cfg80211_registered_device *rdev = info->user_ptr[0];
+        struct wireless_dev *wdev;
+        struct net_device *dev = info->user_ptr[1];
+
+        if ((rate < 0 || rate > 100) ||
+            (intvl < 0 || intvl > NL80211_CQM_TXE_MAX_INTVL))
+                return -EINVAL;
+
+        wdev = dev->ieee80211_ptr;
+
+        if (!rdev->ops->set_cqm_txe_config)
+                return -EOPNOTSUPP;
+
+        if (wdev->iftype != NL80211_IFTYPE_STATION &&
+            wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
+                return -EOPNOTSUPP;
+
+        return rdev->ops->set_cqm_txe_config(wdev->wiphy, dev,
+                                             rate, pkts, intvl);
+}
+
 static int nl80211_set_cqm_rssi(struct genl_info *info,
                                 s32 threshold, u32 hysteresis)
 {
@@ -6316,6 +6343,14 @@ static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
+        } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
+                   attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
+                   attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
+                u32 rate, pkts, intvl;
+                rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
+                pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
+                intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
+                err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
         } else
                 err = -EINVAL;
 
@@ -8496,6 +8531,56 @@ void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
 }
 
 void
+nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
+                            struct net_device *netdev, const u8 *peer,
+                            u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
+{
+        struct sk_buff *msg;
+        struct nlattr *pinfoattr;
+        void *hdr;
+
+        msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+        if (!msg)
+                return;
+
+        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
+        if (!hdr) {
+                nlmsg_free(msg);
+                return;
+        }
+
+        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
+            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
+            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
+                goto nla_put_failure;
+
+        pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
+        if (!pinfoattr)
+                goto nla_put_failure;
+
+        if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
+                goto nla_put_failure;
+
+        if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
+                goto nla_put_failure;
+
+        if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
+                goto nla_put_failure;
+
+        nla_nest_end(msg, pinfoattr);
+
+        genlmsg_end(msg, hdr);
+
+        genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
+                                nl80211_mlme_mcgrp.id, gfp);
+        return;
+
+ nla_put_failure:
+        genlmsg_cancel(msg, hdr);
+        nlmsg_free(msg);
+}
+
+void
 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
                                 struct net_device *netdev, const u8 *peer,
                                 u32 num_packets, gfp_t gfp)