kernel.git/net/mac80211/mesh_sync.c, branch linux-3.7.y

mac80211: call drv_get_tsf() in sleepable context

2012-10-08T19:06:02Z

The call to drv_get/set_tsf() was put on the workqueue to perform tsf adjustments since that function might sleep. However it ended up inside a spinlock, whose critical section must be atomic. Do tsf adjustment outside the spinlock instead, and get rid of a warning. Signed-off-by: Thomas Pedersen Signed-off-by: John W. Linville

mac80211: clean up debugging

2012-06-24T09:32:29Z

There are a few things that make the logging and debugging in mac80211 less useful than it should be right now: * a lot of messages should be pr_info, not pr_debug * wholesale use of pr_debug makes it require *both* Kconfig and dynamic configuration * there are still a lot of ifdefs * the style is very inconsistent, sometimes the sdata->name is printed in front Clean up everything, introducing new macros and separating out the station MLME debugging into a new Kconfig symbol. Signed-off-by: Johannes Berg

net: mac80211: Convert printk(KERN_DEBUG to pr_debug

2012-06-05T19:27:16Z

Standardize the debugging to be able to use dynamic_debug. Coalesce formats, align arguments. Signed-off-by: Joe Perches Signed-off-by: John W. Linville

mac80211: fixup for mesh TSF adjustment latency in Toffset setpoint

2012-04-23T19:37:41Z

The original patch defined the correction margin but did not apply it. Signed-off-by: Shinichi Hotori Signed-off-by: Yu Niiro Signed-off-by: Javier Cardona Signed-off-by: John W. Linville

mac80211: Take into account TSF adjustment latency in Toffset setpoint

2012-04-16T18:19:29Z

When testing mesh synchronization we observed a global TSF slowdown that was dependent on the number of synchronized mesh stations. This seems to be caused by the TSF adjustment (read/write) latency. Adding a small margin to the Toffset setpoint solved the problem. Signed-off-by: Shinichi Hotori Signed-off-by: Yu Niiro Signed-off-by: Javier Cardona Signed-off-by: John W. Linville

mac80211: Choose a new toffset setpoint if a big tsf jump is detected.

2012-04-16T18:19:29Z

Signed-off-by: Javier Cardona Signed-off-by: John W. Linville

mac80211: Implement mesh synchronization framework

2012-04-10T19:20:31Z

This patch adds MBSS extensible synchronization framework (Sec. 13.13.2 of IEEE Std. 802.11-2012). The framework is implemented via an ops table which defines the following functions: rx_bcn_presp() - this is called every time a mesh beacon is received. adjust_tbtt() - this is called immediately before a beacon is about to be transmitted. The default neighbor offset synchronization defined in the standard is implemented. We also provide template functions for vendor specific methods. When neighbor offset synchronization is active (which is the default) mesh neighbors in the same MBSS will track timing offsets to each other and compensate clock drift. In our tests we observed that this mesh synchronization implementation successfully corrected drifts between stations of ~2PPM while introducing a jitter of ~20us. It is also possible to test this framework on mac80211_hwsim simulated phys to see how it behaves under different topologies, over poor links, etc. Signed-off-by: Marco Porsch Signed-off-by: Pavel Zubarev Signed-off-by: Javier Cardona Signed-off-by: John W. Linville