TDMA support for long distance point-to-point links using ath devices:

o add net80211 support for a tdma vap that is built on top of the
  existing adhoc-demo support
o add tdma scheduling of frame transmission to the ath driver; it's
  conceivable other devices might be capable of this too in which case
  they can make use of the 802.11 protocol additions etc.
o add minor bits to user tools that need to know: ifconfig to setup and
  configure, new statistics in athstats, and new debug mask bits

While the architecture can support >2 slots in a TDMA BSS the current
design is intended (and tested) for only 2 slots.

Sponsored by:	Intel

1 files changed, 24 insertions, 2 deletions

diff --git a/sys/net80211/ieee80211_output.c b/sys/net80211/ieee80211_output.c
index 2f10232..f589aa9 100644
--- a/sys/net80211/ieee80211_output.c
+++ b/sys/net80211/ieee80211_output.c
@@ -1,6 +1,6 @@
 /*-
  * Copyright (c) 2001 Atsushi Onoe
- * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
+ * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,6 +47,9 @@ __FBSDID("$FreeBSD$");
 
 #include <net80211/ieee80211_var.h>
 #include <net80211/ieee80211_regdomain.h>
+#ifdef IEEE80211_SUPPORT_TDMA
+#include <net80211/ieee80211_tdma.h>
+#endif
 #include <net80211/ieee80211_wds.h>
 
 #ifdef INET
@@ -2500,6 +2503,7 @@ ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm,
 	 *	[tlv] WME parameters
 	 *	[tlv] Vendor OUI HT capabilities (optional)
 	 *	[tlv] Vendor OUI HT information (optional)
+	 *	[tlv] TDMA parameters (optional)
 	 *	[tlv] application data (optional)
 	 */
 
@@ -2589,6 +2593,12 @@ ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm,
 		frm = ieee80211_add_htcap_vendor(frm, ni);
 		frm = ieee80211_add_htinfo_vendor(frm, ni);
 	}
+#ifdef IEEE80211_SUPPORT_TDMA
+	if (vap->iv_caps & IEEE80211_C_TDMA) {
+		bo->bo_tdma = frm;
+		frm = ieee80211_add_tdma(frm, vap);
+	}
+#endif
 	if (vap->iv_appie_beacon != NULL) {
 		bo->bo_appie = frm;
 		bo->bo_appie_len = vap->iv_appie_beacon->ie_len;
@@ -2637,6 +2647,7 @@ ieee80211_beacon_alloc(struct ieee80211_node *ni,
 	 * XXX Vendor-specific OIDs (e.g. Atheros)
 	 *	[tlv] WPA parameters
 	 *	[tlv] WME parameters
+	 *	[tlv] TDMA parameters (optional)
 	 *	[tlv] application data (optional)
 	 * NB: we allocate the max space required for the TIM bitmap.
 	 * XXX how big is this?
@@ -2661,6 +2672,10 @@ ieee80211_beacon_alloc(struct ieee80211_node *ni,
 		 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */
 		 + (vap->iv_caps & IEEE80211_C_WME ?	/* WME */
 			sizeof(struct ieee80211_wme_param) : 0)
+#ifdef IEEE80211_SUPPORT_TDMA
+		 + (vap->iv_caps & IEEE80211_C_TDMA ?	/* TDMA */
+			sizeof(struct ieee80211_tdma_param) : 0)
+#endif
 		 + IEEE80211_MAX_APPIE
 		 ;
 	m = ieee80211_getmgtframe(&frm,
@@ -2779,7 +2794,14 @@ ieee80211_beacon_update(struct ieee80211_node *ni,
 		ieee80211_ht_update_beacon(vap, bo);
 		clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO);
 	}
-
+#ifdef IEEE80211_SUPPORT_TDMA
+	if (vap->iv_caps & IEEE80211_C_TDMA) {
+		/*
+		 * NB: the beacon is potentially updated every TBTT.
+		 */
+		ieee80211_tdma_update_beacon(vap, bo);
+	}
+#endif
 	if (vap->iv_opmode == IEEE80211_M_HOSTAP) {	/* NB: no IBSS support*/
 		struct ieee80211_tim_ie *tie =
 			(struct ieee80211_tim_ie *) bo->bo_tim;