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/ieee80211_i.h | |
| 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/ieee80211_i.h')
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index c8945e2d8a86..6243109979ed 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1494,6 +1494,11 @@ u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local); int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb, u64 *cookie, gfp_t gfp); +void ieee80211_check_fast_rx(struct sta_info *sta); +void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata); +void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata); +void ieee80211_clear_fast_rx(struct sta_info *sta); + /* STA code */ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata); int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, |