diff options
Diffstat (limited to 'package/kernel/mac80211/patches/subsys/314-cfg80211-implement-APIs-for-dedicated-radar-detectio.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/subsys/314-cfg80211-implement-APIs-for-dedicated-radar-detectio.patch | 378 |
1 files changed, 378 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/subsys/314-cfg80211-implement-APIs-for-dedicated-radar-detectio.patch b/package/kernel/mac80211/patches/subsys/314-cfg80211-implement-APIs-for-dedicated-radar-detectio.patch new file mode 100644 index 0000000000..032bcf7a0c --- /dev/null +++ b/package/kernel/mac80211/patches/subsys/314-cfg80211-implement-APIs-for-dedicated-radar-detectio.patch @@ -0,0 +1,378 @@ +From: Lorenzo Bianconi <lorenzo@kernel.org> +Date: Sat, 23 Oct 2021 11:10:50 +0200 +Subject: [PATCH] cfg80211: implement APIs for dedicated radar detection HW + +If a dedicated (off-channel) radar detection hardware (chain) +is available in the hardware/driver, allow this to be used by +calling the NL80211_CMD_RADAR_DETECT command with a new flag +attribute requesting off-channel radar detection is used. + +Offchannel CAC (channel availability check) avoids the CAC +downtime when switching to a radar channel or when turning on +the AP. + +Drivers advertise support for this using the new feature flag +NL80211_EXT_FEATURE_RADAR_OFFCHAN. + +Tested-by: Evelyn Tsai <evelyn.tsai@mediatek.com> +Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> +Link: https://lore.kernel.org/r/7468e291ef5d05d692c1738d25b8f778d8ea5c3f.1634979655.git.lorenzo@kernel.org +Link: https://lore.kernel.org/r/1e60e60fef00e14401adae81c3d49f3e5f307537.1634979655.git.lorenzo@kernel.org +Link: https://lore.kernel.org/r/85fa50f57fc3adb2934c8d9ca0be30394de6b7e8.1634979655.git.lorenzo@kernel.org +Link: https://lore.kernel.org/r/4b6c08671ad59aae0ac46fc94c02f31b1610eb72.1634979655.git.lorenzo@kernel.org +Link: https://lore.kernel.org/r/241849ccaf2c228873c6f8495bf87b19159ba458.1634979655.git.lorenzo@kernel.org +[remove offchan_mutex, fix cfg80211_stop_offchan_radar_detection(), + remove gfp_t argument, fix documentation, fix tracing] +Signed-off-by: Johannes Berg <johannes.berg@intel.com> +--- + +--- a/include/net/cfg80211.h ++++ b/include/net/cfg80211.h +@@ -4057,6 +4057,15 @@ struct mgmt_frame_regs { + * @set_sar_specs: Update the SAR (TX power) settings. + * + * @color_change: Initiate a color change. ++ * ++ * @set_radar_offchan: Configure dedicated offchannel chain available for ++ * radar/CAC detection on some hw. This chain can't be used to transmit ++ * or receive frames and it is bounded to a running wdev. ++ * Offchannel radar/CAC detection allows to avoid the CAC downtime ++ * switching to a different channel during CAC detection on the selected ++ * radar channel. ++ * The caller is expected to set chandef pointer to NULL in order to ++ * disable offchannel CAC/radar detection. + */ + struct cfg80211_ops { + int (*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow); +@@ -4387,6 +4396,8 @@ struct cfg80211_ops { + int (*color_change)(struct wiphy *wiphy, + struct net_device *dev, + struct cfg80211_color_change_settings *params); ++ int (*set_radar_offchan)(struct wiphy *wiphy, ++ struct cfg80211_chan_def *chandef); + }; + + /* +@@ -7608,6 +7619,20 @@ void cfg80211_cac_event(struct net_devic + const struct cfg80211_chan_def *chandef, + enum nl80211_radar_event event, gfp_t gfp); + ++/** ++ * cfg80211_offchan_cac_event - Channel Availability Check (CAC) offchan event ++ * @wiphy: the wiphy ++ * @chandef: chandef for the current channel ++ * @event: type of event ++ * ++ * This function is called when a Channel Availability Check (CAC) is finished, ++ * started or aborted by a offchannel dedicated chain. ++ * ++ * Note that this acquires the wiphy lock. ++ */ ++void cfg80211_offchan_cac_event(struct wiphy *wiphy, ++ const struct cfg80211_chan_def *chandef, ++ enum nl80211_radar_event event); + + /** + * cfg80211_gtk_rekey_notify - notify userspace about driver rekeying +--- a/include/uapi/linux/nl80211.h ++++ b/include/uapi/linux/nl80211.h +@@ -2608,6 +2608,13 @@ enum nl80211_commands { + * Mandatory parameter for the transmitting interface to enable MBSSID. + * Optional for the non-transmitting interfaces. + * ++ * @NL80211_ATTR_RADAR_OFFCHAN: Configure dedicated offchannel chain available for ++ * radar/CAC detection on some hw. This chain can't be used to transmit ++ * or receive frames and it is bounded to a running wdev. ++ * Offchannel radar/CAC detection allows to avoid the CAC downtime ++ * switching on a different channel during CAC detection on the selected ++ * radar channel. ++ * + * @NUM_NL80211_ATTR: total number of nl80211_attrs available + * @NL80211_ATTR_MAX: highest attribute number currently defined + * @__NL80211_ATTR_AFTER_LAST: internal use +@@ -3114,6 +3121,8 @@ enum nl80211_attrs { + NL80211_ATTR_MBSSID_CONFIG, + NL80211_ATTR_MBSSID_ELEMS, + ++ NL80211_ATTR_RADAR_OFFCHAN, ++ + /* add attributes here, update the policy in nl80211.c */ + + __NL80211_ATTR_AFTER_LAST, +@@ -6013,6 +6022,9 @@ enum nl80211_feature_flags { + * @NL80211_EXT_FEATURE_BSS_COLOR: The driver supports BSS color collision + * detection and change announcemnts. + * ++ * @NL80211_EXT_FEATURE_RADAR_OFFCHAN: Device supports offchannel radar/CAC ++ * detection. ++ * + * @NUM_NL80211_EXT_FEATURES: number of extended features. + * @MAX_NL80211_EXT_FEATURES: highest extended feature index. + */ +@@ -6078,6 +6090,7 @@ enum nl80211_ext_feature_index { + NL80211_EXT_FEATURE_SECURE_RTT, + NL80211_EXT_FEATURE_PROT_RANGE_NEGO_AND_MEASURE, + NL80211_EXT_FEATURE_BSS_COLOR, ++ NL80211_EXT_FEATURE_RADAR_OFFCHAN, + + /* add new features before the definition below */ + NUM_NL80211_EXT_FEATURES, +--- a/net/wireless/core.c ++++ b/net/wireless/core.c +@@ -552,6 +552,7 @@ use_default_name: + INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work); + INIT_WORK(&rdev->conn_work, cfg80211_conn_work); + INIT_WORK(&rdev->event_work, cfg80211_event_work); ++ INIT_DELAYED_WORK(&rdev->offchan_cac_work, cfg80211_offchan_cac_work); + + init_waitqueue_head(&rdev->dev_wait); + +@@ -1214,6 +1215,8 @@ void __cfg80211_leave(struct cfg80211_re + + cfg80211_pmsr_wdev_down(wdev); + ++ cfg80211_stop_offchan_radar_detection(wdev); ++ + switch (wdev->iftype) { + case NL80211_IFTYPE_ADHOC: + __cfg80211_leave_ibss(rdev, dev, true); +--- a/net/wireless/core.h ++++ b/net/wireless/core.h +@@ -84,6 +84,10 @@ struct cfg80211_registered_device { + + struct delayed_work dfs_update_channels_wk; + ++ struct wireless_dev *offchan_radar_wdev; ++ struct cfg80211_chan_def offchan_radar_chandef; ++ struct delayed_work offchan_cac_work; ++ + /* netlink port which started critical protocol (0 means not started) */ + u32 crit_proto_nlportid; + +@@ -491,6 +495,15 @@ cfg80211_chandef_dfs_cac_time(struct wip + + void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); + ++int ++cfg80211_start_offchan_radar_detection(struct cfg80211_registered_device *rdev, ++ struct wireless_dev *wdev, ++ struct cfg80211_chan_def *chandef); ++ ++void cfg80211_stop_offchan_radar_detection(struct wireless_dev *wdev); ++ ++void cfg80211_offchan_cac_work(struct work_struct *work); ++ + bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, + struct ieee80211_channel *chan); + +--- a/net/wireless/mlme.c ++++ b/net/wireless/mlme.c +@@ -970,3 +970,116 @@ void cfg80211_cac_event(struct net_devic + nl80211_radar_notify(rdev, chandef, event, netdev, gfp); + } + EXPORT_SYMBOL(cfg80211_cac_event); ++ ++void cfg80211_offchan_cac_work(struct work_struct *work) ++{ ++ struct delayed_work *delayed_work = to_delayed_work(work); ++ struct cfg80211_registered_device *rdev; ++ ++ rdev = container_of(delayed_work, struct cfg80211_registered_device, ++ offchan_cac_work); ++ cfg80211_offchan_cac_event(&rdev->wiphy, &rdev->offchan_radar_chandef, ++ NL80211_RADAR_CAC_FINISHED); ++} ++ ++static void ++__cfg80211_offchan_cac_event(struct cfg80211_registered_device *rdev, ++ struct wireless_dev *wdev, ++ const struct cfg80211_chan_def *chandef, ++ enum nl80211_radar_event event) ++{ ++ struct wiphy *wiphy = &rdev->wiphy; ++ struct net_device *netdev; ++ ++ lockdep_assert_wiphy(&rdev->wiphy); ++ ++ if (event != NL80211_RADAR_CAC_STARTED && !rdev->offchan_radar_wdev) ++ return; ++ ++ switch (event) { ++ case NL80211_RADAR_CAC_FINISHED: ++ cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE); ++ memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef)); ++ queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk); ++ cfg80211_sched_dfs_chan_update(rdev); ++ wdev = rdev->offchan_radar_wdev; ++ rdev->offchan_radar_wdev = NULL; ++ break; ++ case NL80211_RADAR_CAC_ABORTED: ++ cancel_delayed_work(&rdev->offchan_cac_work); ++ wdev = rdev->offchan_radar_wdev; ++ rdev->offchan_radar_wdev = NULL; ++ break; ++ case NL80211_RADAR_CAC_STARTED: ++ WARN_ON(!wdev); ++ rdev->offchan_radar_wdev = wdev; ++ break; ++ default: ++ return; ++ } ++ ++ netdev = wdev ? wdev->netdev : NULL; ++ nl80211_radar_notify(rdev, chandef, event, netdev, GFP_KERNEL); ++} ++ ++void cfg80211_offchan_cac_event(struct wiphy *wiphy, ++ const struct cfg80211_chan_def *chandef, ++ enum nl80211_radar_event event) ++{ ++ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); ++ ++ wiphy_lock(wiphy); ++ __cfg80211_offchan_cac_event(rdev, NULL, chandef, event); ++ wiphy_unlock(wiphy); ++} ++EXPORT_SYMBOL(cfg80211_offchan_cac_event); ++ ++int ++cfg80211_start_offchan_radar_detection(struct cfg80211_registered_device *rdev, ++ struct wireless_dev *wdev, ++ struct cfg80211_chan_def *chandef) ++{ ++ unsigned int cac_time_ms; ++ int err; ++ ++ lockdep_assert_wiphy(&rdev->wiphy); ++ ++ if (!wiphy_ext_feature_isset(&rdev->wiphy, ++ NL80211_EXT_FEATURE_RADAR_OFFCHAN)) ++ return -EOPNOTSUPP; ++ ++ if (rdev->offchan_radar_wdev) ++ return -EBUSY; ++ ++ err = rdev_set_radar_offchan(rdev, chandef); ++ if (err) ++ return err; ++ ++ cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, chandef); ++ if (!cac_time_ms) ++ cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; ++ ++ rdev->offchan_radar_chandef = *chandef; ++ __cfg80211_offchan_cac_event(rdev, wdev, chandef, ++ NL80211_RADAR_CAC_STARTED); ++ queue_delayed_work(cfg80211_wq, &rdev->offchan_cac_work, ++ msecs_to_jiffies(cac_time_ms)); ++ ++ return 0; ++} ++ ++void cfg80211_stop_offchan_radar_detection(struct wireless_dev *wdev) ++{ ++ struct wiphy *wiphy = wdev->wiphy; ++ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); ++ ++ lockdep_assert_wiphy(wiphy); ++ ++ if (wdev != rdev->offchan_radar_wdev) ++ return; ++ ++ rdev_set_radar_offchan(rdev, NULL); ++ ++ __cfg80211_offchan_cac_event(rdev, NULL, NULL, ++ NL80211_RADAR_CAC_ABORTED); ++} +--- a/net/wireless/nl80211.c ++++ b/net/wireless/nl80211.c +@@ -793,6 +793,7 @@ static const struct nla_policy nl80211_p + [NL80211_ATTR_MBSSID_CONFIG] = + NLA_POLICY_NESTED(nl80211_mbssid_config_policy), + [NL80211_ATTR_MBSSID_ELEMS] = { .type = NLA_NESTED }, ++ [NL80211_ATTR_RADAR_OFFCHAN] = { .type = NLA_FLAG }, + }; + + /* policy for the key attributes */ +@@ -9269,12 +9270,6 @@ static int nl80211_start_radar_detection + if (err) + return err; + +- if (netif_carrier_ok(dev)) +- return -EBUSY; +- +- if (wdev->cac_started) +- return -EBUSY; +- + err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype); + if (err < 0) + return err; +@@ -9285,6 +9280,16 @@ static int nl80211_start_radar_detection + if (!cfg80211_chandef_dfs_usable(wiphy, &chandef)) + return -EINVAL; + ++ if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_OFFCHAN])) ++ return cfg80211_start_offchan_radar_detection(rdev, wdev, ++ &chandef); ++ ++ if (netif_carrier_ok(dev)) ++ return -EBUSY; ++ ++ if (wdev->cac_started) ++ return -EBUSY; ++ + /* CAC start is offloaded to HW and can't be started manually */ + if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD)) + return -EOPNOTSUPP; +--- a/net/wireless/rdev-ops.h ++++ b/net/wireless/rdev-ops.h +@@ -1381,4 +1381,21 @@ static inline int rdev_color_change(stru + return ret; + } + ++static inline int ++rdev_set_radar_offchan(struct cfg80211_registered_device *rdev, ++ struct cfg80211_chan_def *chandef) ++{ ++ struct wiphy *wiphy = &rdev->wiphy; ++ int ret; ++ ++ if (!rdev->ops->set_radar_offchan) ++ return -EOPNOTSUPP; ++ ++ trace_rdev_set_radar_offchan(wiphy, chandef); ++ ret = rdev->ops->set_radar_offchan(wiphy, chandef); ++ trace_rdev_return_int(wiphy, ret); ++ ++ return ret; ++} ++ + #endif /* __CFG80211_RDEV_OPS */ +--- a/net/wireless/trace.h ++++ b/net/wireless/trace.h +@@ -3643,6 +3643,25 @@ TRACE_EVENT(cfg80211_bss_color_notify, + __entry->color_bitmap) + ); + ++TRACE_EVENT(rdev_set_radar_offchan, ++ TP_PROTO(struct wiphy *wiphy, struct cfg80211_chan_def *chandef), ++ ++ TP_ARGS(wiphy, chandef), ++ ++ TP_STRUCT__entry( ++ WIPHY_ENTRY ++ CHAN_DEF_ENTRY ++ ), ++ ++ TP_fast_assign( ++ WIPHY_ASSIGN; ++ CHAN_DEF_ASSIGN(chandef) ++ ), ++ ++ TP_printk(WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT, ++ WIPHY_PR_ARG, CHAN_DEF_PR_ARG) ++); ++ + #endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */ + + #undef TRACE_INCLUDE_PATH |