mac80211: add TX fastpath
In order to speed up mac80211's TX path, add the "fast-xmit" cache
that will cache the data frame 802.11 header and other data to be
able to build the frame more quickly. This cache is rebuilt when
external triggers imply changes, but a lot of the checks done per
packet today are simplified away to the check for the cache.
There's also a more detailed description in the code.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 38a5fd7..9001bd6 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1796,6 +1796,10 @@
* the driver returns 1. This also forces the driver to advertise its
* supported cipher suites.
*
+ * @IEEE80211_HW_SUPPORT_FAST_XMIT: The driver/hardware supports fast-xmit,
+ * this currently requires only the ability to calculate the duration
+ * for frames.
+ *
* @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface
* queue mapping in order to use different queues (not just one per AC)
* for different virtual interfaces. See the doc section on HW queue
@@ -1844,7 +1848,7 @@
IEEE80211_HW_WANT_MONITOR_VIF = 1<<14,
IEEE80211_HW_NO_AUTO_VIF = 1<<15,
IEEE80211_HW_SW_CRYPTO_CONTROL = 1<<16,
- /* free slots */
+ IEEE80211_HW_SUPPORT_FAST_XMIT = 1<<17,
IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18,
IEEE80211_HW_CONNECTION_MONITOR = 1<<19,
IEEE80211_HW_QUEUE_CONTROL = 1<<20,