Replay r286410. Change KPI of how device drivers that provide wireless

connectivity interact with the net80211 stack.

Historical background: originally wireless devices created an interface,
just like Ethernet devices do. Name of an interface matched the name of
the driver that created. Later, wlan(4) layer was introduced, and the
wlanX interfaces become the actual interface, leaving original ones as
"a parent interface" of wlanX. Kernelwise, the KPI between net80211 layer
and a driver became a mix of methods that pass a pointer to struct ifnet
as identifier and methods that pass pointer to struct ieee80211com. From
user point of view, the parent interface just hangs on in the ifconfig
list, and user can't do anything useful with it.

Now, the struct ifnet goes away. The struct ieee80211com is the only
KPI between a device driver and net80211. Details:

- The struct ieee80211com is embedded into drivers softc.
- Packets are sent via new ic_transmit method, which is very much like
  the previous if_transmit.
- Bringing parent up/down is done via new ic_parent method, which notifies
  driver about any changes: number of wlan(4) interfaces, number of them
  in promisc or allmulti state.
- Device specific ioctls (if any) are received on new ic_ioctl method.
- Packets/errors accounting are done by the stack. In certain cases, when
  driver experiences errors and can not attribute them to any specific
  interface, driver updates ic_oerrors or ic_ierrors counters.

Details on interface configuration with new world order:
- A sequence of commands needed to bring up wireless DOESN"T change.
- /etc/rc.conf parameters DON'T change.
- List of devices that can be used to create wlan(4) interfaces is
  now provided by net.wlan.devices sysctl.

Most drivers in this change were converted by me, except of wpi(4),
that was done by Andriy Voskoboinyk. Big thanks to Kevin Lo for testing
changes to at least 8 drivers. Thanks to pluknet@, Oliver Hartmann,
Olivier Cochard, gjb@, mmoll@, op@ and lev@, who also participated in
testing.

Reviewed by:	adrian
Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.

1 files changed, 4 insertions, 5 deletions

diff --git a/sys/dev/ral/rt2560var.h b/sys/dev/ral/rt2560var.h
index b6a8d68..3a5fef9 100644
--- a/sys/dev/ral/rt2560var.h
+++ b/sys/dev/ral/rt2560var.h
@@ -105,13 +105,13 @@ struct rt2560_vap {
 #define	RT2560_VAP(vap)		((struct rt2560_vap *)(vap))
 
 struct rt2560_softc {
-	struct ifnet		*sc_ifp;
+	struct ieee80211com	sc_ic;
+	struct mtx		sc_mtx;
+	struct mbufq		sc_snd;
 	device_t		sc_dev;
 	bus_space_tag_t		sc_st;
 	bus_space_handle_t	sc_sh;
 
-	struct mtx		sc_mtx;
-
 	struct callout		watchdog_ch;
 
 	int			sc_tx_timer;
@@ -152,8 +152,7 @@ struct rt2560_softc {
 	struct rt2560_tx_radiotap_header sc_txtap;
 	int			sc_txtap_len;
 #define RT2560_F_INPUT_RUNNING	0x1
-#define RT2560_F_PRIO_OACTIVE	0x2
-#define RT2560_F_DATA_OACTIVE	0x4
+#define RT2560_F_RUNNING	0x2
 	int			sc_flags;
 };