diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2016-03-31 20:02:10 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2016-04-06 13:18:18 +0200 |
| commit | 49ddf8e6e2347cffdcf83d1ca2d04ff929820178 (patch) | |
| tree | 93ae97699c3abf8d47a1c4571dfdfb466c955df6 /net/mac80211/cfg.c | |
| parent | 0f9c5a61d4b2330b12c59126aa5a9108dbfce555 (diff) | |
mac80211: add fast-rx path
The regular RX path has a lot of code, but with a few
assumptions on the hardware it's possible to reduce the
amount of code significantly. Currently the assumptions
on the driver are the following:
* hardware/driver reordering buffer (if supporting aggregation)
* hardware/driver decryption & PN checking (if using encryption)
* hardware/driver did de-duplication
* hardware/driver did A-MSDU deaggregation
* AP_LINK_PS is used (in AP mode)
* no client powersave handling in mac80211 (in client mode)
of which some are actually checked per packet:
* de-duplication
* PN checking
* decryption
and additionally packets must
* not be A-MSDU (have been deaggregated by driver/device)
* be data packets
* not be fragmented
* be unicast
* have RFC 1042 header
Additionally dynamically we assume:
* no encryption or CCMP/GCMP, TKIP/WEP/other not allowed
* station must be authorized
* 4-addr format not enabled
Some data needed for the RX path is cached in a new per-station
"fast_rx" structure, so that we only need to look at this and
the packet, no other memory when processing packets on the fast
RX path.
After doing the above per-packet checks, the data path collapses
down to a pretty simple conversion function taking advantage of
the data cached in the small fast_rx struct.
This should speed up the RX processing, and will make it easier
to reason about parallelizing RX (for which statistics will need
to be per-CPU still.)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/cfg.c')
| -rw-r--r-- | net/mac80211/cfg.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 62a90f270f03..fc4730b938d0 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -65,11 +65,13 @@ static int ieee80211_change_iface(struct wiphy *wiphy, return ret; if (type == NL80211_IFTYPE_AP_VLAN && - params && params->use_4addr == 0) + params && params->use_4addr == 0) { RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); - else if (type == NL80211_IFTYPE_STATION && - params && params->use_4addr >= 0) + ieee80211_check_fast_rx_iface(sdata); + } else if (type == NL80211_IFTYPE_STATION && + params && params->use_4addr >= 0) { sdata->u.mgd.use_4addr = params->use_4addr; + } if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) { struct ieee80211_local *local = sdata->local; @@ -1367,6 +1369,7 @@ static int ieee80211_change_station(struct wiphy *wiphy, rcu_assign_pointer(vlansdata->u.vlan.sta, sta); new_4addr = true; + __ieee80211_check_fast_rx_iface(vlansdata); } if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && @@ -1889,6 +1892,7 @@ static int ieee80211_change_bss(struct wiphy *wiphy, sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS; else sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS; + ieee80211_check_fast_rx_iface(sdata); } if (params->ht_opmode >= 0) { |