diff options
| author | John Crispin <john@phrozen.org> | 2019-11-25 13:04:37 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2019-12-13 22:02:36 +0300 |
| commit | 50ff477a8639fa1fbbeecb5a6f2f8b6c5557ecec (patch) | |
| tree | 80f92c0113ec7e174a6595cce0666cdc7ee5c3ce /net/mac80211/iface.c | |
| parent | 9bcb084f0b648d032efdbb8226fe33663f8fca79 (diff) | |
| download | linux-50ff477a8639fa1fbbeecb5a6f2f8b6c5557ecec.tar.xz | |
mac80211: add 802.11 encapsulation offloading support
This patch adds a new transmit path for hardware that supports 802.11
encapsulation offloading. In those cases 802.3 frames get passed
directly to the driver allowing the hardware to handle the encapsulation.
Some features such as monitor mode and TKIP would break when encapsulation
offloading is enabled. If any of these get enabled, the code will alwyas
fallback to the normal sw encapsulation data path.
The patch defines a secondary netdev_ops struct that the device gets
assigned if 802.11 encap support is available and enabled. The driver
needs to enable the support on a per vif basis if it finds that all
pre-reqs are meet.
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qti.qualcomm.com>
Signed-off-by: John Crispin <john@phrozen.org>
Link: https://lore.kernel.org/r/20191125100438.16539-1-john@phrozen.org
[reword comments, remove SUPPORTS_80211_ENCAP HW flag, minor cleanups]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/iface.c')
| -rw-r--r-- | net/mac80211/iface.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index af8b09214786..9b833e170c20 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -1205,6 +1205,72 @@ static const struct net_device_ops ieee80211_monitorif_ops = { .ndo_get_stats64 = ieee80211_get_stats64, }; +static const struct net_device_ops ieee80211_dataif_8023_ops = { + .ndo_open = ieee80211_open, + .ndo_stop = ieee80211_stop, + .ndo_uninit = ieee80211_uninit, + .ndo_start_xmit = ieee80211_subif_start_xmit_8023, + .ndo_set_rx_mode = ieee80211_set_multicast_list, + .ndo_set_mac_address = ieee80211_change_mac, + .ndo_select_queue = ieee80211_netdev_select_queue, + .ndo_get_stats64 = ieee80211_get_stats64, +}; + +static void __ieee80211_set_hw_80211_encap(struct ieee80211_sub_if_data *sdata, + bool enable) +{ + sdata->dev->netdev_ops = enable ? &ieee80211_dataif_8023_ops : + &ieee80211_dataif_ops; + sdata->hw_80211_encap = enable; +} + +bool ieee80211_set_hw_80211_encap(struct ieee80211_vif *vif, bool enable) +{ + struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); + struct ieee80211_local *local = sdata->local; + struct ieee80211_sub_if_data *iter; + struct ieee80211_key *key; + + mutex_lock(&local->iflist_mtx); + list_for_each_entry(iter, &local->interfaces, list) { + struct ieee80211_sub_if_data *disable = NULL; + + if (vif->type == NL80211_IFTYPE_MONITOR) { + disable = iter; + __ieee80211_set_hw_80211_encap(iter, false); + } else if (iter->vif.type == NL80211_IFTYPE_MONITOR) { + disable = sdata; + enable = false; + } + if (disable) + sdata_dbg(disable, + "disable hw 80211 encap due to mon co-exist\n"); + } + mutex_unlock(&local->iflist_mtx); + + if (enable == sdata->hw_80211_encap) + return enable; + + if (!sdata->dev) + return false; + + if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && + (local->hw.wiphy->frag_threshold != (u32)-1)) + enable = false; + + mutex_lock(&sdata->local->key_mtx); + list_for_each_entry(key, &sdata->key_list, list) { + if (key->conf.cipher == WLAN_CIPHER_SUITE_TKIP) + enable = false; + } + mutex_unlock(&sdata->local->key_mtx); + + __ieee80211_set_hw_80211_encap(sdata, enable); + + return enable; +} +EXPORT_SYMBOL(ieee80211_set_hw_80211_encap); + static void ieee80211_if_free(struct net_device *dev) { free_percpu(dev->tstats); @@ -1404,6 +1470,7 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, sdata->vif.bss_conf.idle = true; sdata->noack_map = 0; + sdata->hw_80211_encap = false; /* only monitor/p2p-device differ */ if (sdata->dev) { |