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, 16 insertions, 1 deletions

diff --git a/sys/net80211/ieee80211.c b/sys/net80211/ieee80211.c
index e0a9432..ae416f8 100644
--- a/sys/net80211/ieee80211.c
+++ b/sys/net80211/ieee80211.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
@@ -362,6 +362,21 @@ ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
 		if (flags & IEEE80211_CLONE_WDSLEGACY)
 			vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
 		break;
+#ifdef IEEE80211_SUPPORT_TDMA
+	case IEEE80211_M_AHDEMO:
+		if (flags & IEEE80211_CLONE_TDMA) {
+			/* NB: checked before clone operation allowed */
+			KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
+			    ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
+			/*
+			 * Propagate TDMA capability to mark vap; this
+			 * cannot be removed and is used to distinguish
+			 * regular ahdemo operation from ahdemo+tdma.
+			 */
+			vap->iv_caps |= IEEE80211_C_TDMA;
+		}
+		break;
+#endif
 	}
 	/* auto-enable s/w beacon miss support */
 	if (flags & IEEE80211_CLONE_NOBEACONS)