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mac80211: allow low-level drivers to set netdev feature bits
Low level drivers can now set certain netdev feature bits in netdev_features member of the ieee80211_hw struct. These will be propagated to every netdev created from this HW. The white-listed features currently include only ones related to HW checksumming. Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -1297,6 +1297,10 @@ enum ieee80211_hw_flags {
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* reports, by default it is set to _MCS, _GI and _BW but doesn't
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* include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only
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* adding _BW is supported today.
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*
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* @netdev_features: netdev features to be set in each netdev created
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* from this HW. Note only HW checksum features are currently
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* compatible with mac80211. Other feature bits will be rejected.
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*/
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struct ieee80211_hw {
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struct ieee80211_conf conf;
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@ -1319,6 +1323,7 @@ struct ieee80211_hw {
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u8 max_tx_aggregation_subframes;
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u8 offchannel_tx_hw_queue;
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u8 radiotap_mcs_details;
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netdev_features_t netdev_features;
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};
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/**
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@ -1352,6 +1352,8 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
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sdata->u.mgd.use_4addr = params->use_4addr;
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}
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ndev->features |= local->hw.netdev_features;
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ret = register_netdevice(ndev);
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if (ret)
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goto fail;
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@ -682,6 +682,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
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enum ieee80211_band band;
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int channels, max_bitrates;
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bool supp_ht;
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netdev_features_t feature_whitelist;
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static const u32 cipher_suites[] = {
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/* keep WEP first, it may be removed below */
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WLAN_CIPHER_SUITE_WEP40,
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@ -708,6 +709,12 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
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if ((hw->flags & IEEE80211_HW_SCAN_WHILE_IDLE) && !local->ops->hw_scan)
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return -EINVAL;
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/* Only HW csum features are currently compatible with mac80211 */
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feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
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NETIF_F_HW_CSUM;
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if (WARN_ON(hw->netdev_features & ~feature_whitelist))
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return -EINVAL;
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if (hw->max_report_rates == 0)
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hw->max_report_rates = hw->max_rates;
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