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, 16 insertions, 2 deletions

diff --git a/drivers/net/wireless/rt2x00/rt61pci.h b/drivers/net/wireless/rt2x00/rt61pci.h
index 10519f8c578..d291c0fe405 100644
--- a/drivers/net/wireless/rt2x00/rt61pci.h
+++ b/drivers/net/wireless/rt2x00/rt61pci.h
@@ -161,7 +161,9 @@ struct hw_pairwise_ta_entry {
 #define HW_BEACON_BASE1			0x2d00
 #define HW_BEACON_BASE2			0x2e00
 #define HW_BEACON_BASE3			0x2f00
-#define HW_BEACON_OFFSET		0x0100
+
+#define HW_BEACON_OFFSET(__index) \
+	( HW_BEACON_BASE0 + (__index * 0x0100) )
 
 /*
  * HOST-MCU shared memory.
@@ -234,6 +236,11 @@ struct hw_pairwise_ta_entry {
 
 /*
  * MAC_CSR3: STA MAC register 1.
+ * UNICAST_TO_ME_MASK:
+ *	Used to mask off bits from byte 5 of the MAC address
+ *	to determine the UNICAST_TO_ME bit for RX frames.
+ *	The full mask is complemented by BSS_ID_MASK:
+ *		MASK = BSS_ID_MASK & UNICAST_TO_ME_MASK
  */
 #define MAC_CSR3			0x300c
 #define MAC_CSR3_BYTE4			FIELD32(0x000000ff)
@@ -251,7 +258,14 @@ struct hw_pairwise_ta_entry {
 
 /*
  * MAC_CSR5: BSSID register 1.
- * BSS_ID_MASK: 3: one BSSID, 0: 4 BSSID, 2 or 1: 2 BSSID.
+ * BSS_ID_MASK:
+ *	This mask is used to mask off bits 0 and 1 of byte 5 of the
+ *	BSSID. This will make sure that those bits will be ignored
+ *	when determining the MY_BSS of RX frames.
+ *		0: 1-BSSID mode (BSS index = 0)
+ *		1: 2-BSSID mode (BSS index: Byte5, bit 0)
+ *		2: 2-BSSID mode (BSS index: byte5, bit 1)
+ *		3: 4-BSSID mode (BSS index: byte5, bit 0 - 1)
  */
 #define MAC_CSR5			0x3014
 #define MAC_CSR5_BYTE4			FIELD32(0x000000ff)