rt2x00: Add per-interface structure

Rework the interface handling. Delete the interface structure
and replace it with a per-interface structure. This changes the
way rt2x00 handles the active interface drastically.

Copy ieee80211_bss_conf to the this rt2x00_intf structure during
the bss_info_changed() callback function. This will allow us to
reference it later, and removes the requirement for the device flag
SHORT_PREAMBLE flag which is interface specific.

Drivers receive the option to give the maximum number of virtual
interfaces the device can handle. Virtual interface support:
rt2400pci: 1 sta or 1 ap, * monitor interfaces
rt2500pci: 1 sta or 1 ap, * monitor interfaces
rt2500usb: 1 sta or 1 ap, * monitor interfaces
rt61pci: 1 sta or 4 ap, * monitor interfaces
rt73usb: 1 sta or 4 ap, * monitor interfaces

At the moment none of the drivers support AP and STA interfaces
simultaneously, this is a hardware limitation so future support
will be very unlikely.

Each interface structure receives its dedicated beacon entry,
with this we can easily work with beaconing while multiple master
mode interfaces are currently active.

The configuration handlers for the MAC, BSSID and type are
often called together since they all belong to the interface
configuration. Merge the 3 configuration calls and cleanup
the API between rt2x00lib and the drivers. While we are cleaning
up the interface configuration anyway, we might as well clean up
the configuration handler as well.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 72 insertions, 47 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00config.c b/drivers/net/wireless/rt2x00/rt2x00config.c
index c247ee7..20231e0 100644
--- a/drivers/net/wireless/rt2x00/rt2x00config.c
+++ b/drivers/net/wireless/rt2x00/rt2x00config.c
@@ -29,64 +29,89 @@
 #include "rt2x00.h"
 #include "rt2x00lib.h"
 
-
-/*
- * The MAC and BSSID addressess are simple array of bytes,
- * these arrays are little endian, so when sending the addressess
- * to the drivers, copy the it into a endian-signed variable.
- *
- * Note that all devices (except rt2500usb) have 32 bits
- * register word sizes. This means that whatever variable we
- * pass _must_ be a multiple of 32 bits. Otherwise the device
- * might not accept what we are sending to it.
- * This will also make it easier for the driver to write
- * the data to the device.
- *
- * Also note that when NULL is passed as address the
- * we will send 00:00:00:00:00 to the device to clear the address.
- * This will prevent the device being confused when it wants
- * to ACK frames or consideres itself associated.
- */
-void rt2x00lib_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *mac)
+void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
+			   struct rt2x00_intf *intf,
+			   enum ieee80211_if_types type,
+			   u8 *mac, u8 *bssid)
 {
-	__le32 reg[2];
-
-	memset(&reg, 0, sizeof(reg));
-	if (mac)
-		memcpy(&reg, mac, ETH_ALEN);
-
-	rt2x00dev->ops->lib->config_mac_addr(rt2x00dev, &reg[0]);
-}
+	struct rt2x00intf_conf conf;
+	unsigned int flags = 0;
 
-void rt2x00lib_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
-{
-	__le32 reg[2];
-
-	memset(&reg, 0, sizeof(reg));
-	if (bssid)
-		memcpy(&reg, bssid, ETH_ALEN);
-
-	rt2x00dev->ops->lib->config_bssid(rt2x00dev, &reg[0]);
-}
-
-void rt2x00lib_config_type(struct rt2x00_dev *rt2x00dev, const int type)
-{
-	int tsf_sync;
+	conf.type = type;
 
 	switch (type) {
 	case IEEE80211_IF_TYPE_IBSS:
 	case IEEE80211_IF_TYPE_AP:
-		tsf_sync = TSF_SYNC_BEACON;
+		conf.sync = TSF_SYNC_BEACON;
 		break;
 	case IEEE80211_IF_TYPE_STA:
-		tsf_sync = TSF_SYNC_INFRA;
+		conf.sync = TSF_SYNC_INFRA;
 		break;
 	default:
-		tsf_sync = TSF_SYNC_NONE;
+		conf.sync = TSF_SYNC_NONE;
 		break;
 	}
 
-	rt2x00dev->ops->lib->config_type(rt2x00dev, type, tsf_sync);
+	/*
+	 * Note that when NULL is passed as address we will send
+	 * 00:00:00:00:00 to the device to clear the address.
+	 * This will prevent the device being confused when it wants
+	 * to ACK frames or consideres itself associated.
+	 */
+	memset(&conf.mac, 0, sizeof(conf.mac));
+	if (mac)
+		memcpy(&conf.mac, mac, ETH_ALEN);
+
+	memset(&conf.bssid, 0, sizeof(conf.bssid));
+	if (bssid)
+		memcpy(&conf.bssid, bssid, ETH_ALEN);
+
+	flags |= CONFIG_UPDATE_TYPE;
+	if (mac || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
+		flags |= CONFIG_UPDATE_MAC;
+	if (bssid || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
+		flags |= CONFIG_UPDATE_BSSID;
+
+	rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags);
+}
+
+void rt2x00lib_config_preamble(struct rt2x00_dev *rt2x00dev,
+			       struct rt2x00_intf *intf,
+			       const unsigned int short_preamble)
+{
+	int retval;
+	int ack_timeout;
+	int ack_consume_time;
+
+	ack_timeout = PLCP + get_duration(ACK_SIZE, 10);
+	ack_consume_time = SIFS + PLCP + get_duration(ACK_SIZE, 10);
+
+	if (rt2x00dev->hw->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME)
+		ack_timeout += SHORT_DIFS;
+	else
+		ack_timeout += DIFS;
+
+	if (short_preamble) {
+		ack_timeout += SHORT_PREAMBLE;
+		ack_consume_time += SHORT_PREAMBLE;
+	} else {
+		ack_timeout += PREAMBLE;
+		ack_consume_time += PREAMBLE;
+	}
+
+	retval = rt2x00dev->ops->lib->config_preamble(rt2x00dev,
+						      short_preamble,
+						      ack_timeout,
+						      ack_consume_time);
+
+	spin_lock(&intf->lock);
+
+	if (retval) {
+		intf->delayed_flags |= DELAYED_CONFIG_PREAMBLE;
+		queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
+	}
+
+	spin_unlock(&intf->lock);
 }
 
 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
@@ -113,7 +138,7 @@ void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 	 * The latter is required since we need to recalibrate the
 	 * noise-sensitivity ratio for the new setup.
 	 */
-	rt2x00dev->ops->lib->config(rt2x00dev, CONFIG_UPDATE_ANTENNA, &libconf);
+	rt2x00dev->ops->lib->config(rt2x00dev, &libconf, CONFIG_UPDATE_ANTENNA);
 	rt2x00lib_reset_link_tuner(rt2x00dev);
 
 	rt2x00dev->link.ant.active.rx = libconf.ant.rx;
@@ -266,7 +291,7 @@ config:
 	/*
 	 * Start configuration.
 	 */
-	rt2x00dev->ops->lib->config(rt2x00dev, flags, &libconf);
+	rt2x00dev->ops->lib->config(rt2x00dev, &libconf, flags);
 
 	/*
 	 * Some configuration changes affect the link quality