Create a taskqueue for each wireless interface which provides a serialised

sleepable context for net80211 driver callbacks. This removes the need for USB
and firmware based drivers to roll their own code to defer the chip programming
for state changes, scan requests, channel changes and mcast/promisc updates.
When a driver callback completes the hardware state is now guaranteed to have
been updated and is in sync with net80211 layer.

This nukes around 1300 lines of code from the wireless device drivers making
them more readable and less race prone.

The net80211 layer has been updated as follows
 - all state/channel changes are serialised on the taskqueue.
 - ieee80211_new_state() always queues and can now be called from any context
 - scanning runs from a single taskq function and executes to completion. driver
   callbacks are synchronous so the channel, phy mode and rx filters are
   guaranteed to be set in hardware before probe request frames are
   transmitted.

Help and contributions from Sam Leffler.

Reviewed by:	sam

1 files changed, 0 insertions, 56 deletions

diff --git a/sys/dev/usb/wlan/usb_wlan.h b/sys/dev/usb/wlan/usb_wlan.h
deleted file mode 100644
index aa0f1c4..0000000
--- a/sys/dev/usb/wlan/usb_wlan.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/* $FreeBSD$ */
-/*-
- * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef _USB2_WLAN_H_
-#define	_USB2_WLAN_H_
-
-#include <sys/param.h>
-#include <sys/sockio.h>
-#include <sys/mbuf.h>
-#include <sys/kernel.h>
-#include <sys/socket.h>
-
-#include <net/bpf.h>
-#include <net/if.h>
-#include <net/if_arp.h>
-#include <net/ethernet.h>
-#include <net/if_dl.h>
-#include <net/if_media.h>
-#include <net/if_types.h>
-#include <net/if_clone.h>
-
-#include <net80211/ieee80211_var.h>
-#include <net80211/ieee80211_radiotap.h>
-#include <net80211/ieee80211_amrr.h>
-#include <net80211/ieee80211_regdomain.h>
-
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/in_var.h>
-#include <netinet/ip.h>
-#include <netinet/if_ether.h>
-
-#endif					/* _USB2_WLAN_H_ */