madwifi: remove the minstrel_mrr hack and add two patches that massively improve minstrel's performance and response time

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10897 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 76 insertions, 0 deletions

diff --git a/package/madwifi/patches/380-minstrel_sampling.patch b/package/madwifi/patches/380-minstrel_sampling.patch
new file mode 100644
index 000000000..ea4c25f3a
--- /dev/null
+++ b/package/madwifi/patches/380-minstrel_sampling.patch
@@ -0,0 +1,76 @@
+Index: madwifi-trunk-r3314/ath/if_ath.c
+===================================================================
+--- madwifi-trunk-r3314.orig/ath/if_ath.c	2008-04-21 02:44:23.000000000 +0200
++++ madwifi-trunk-r3314/ath/if_ath.c	2008-04-21 03:33:02.000000000 +0200
+@@ -8095,6 +8095,7 @@
+ 		ath_hal_setupxtxdesc(sc->sc_ah, ds, mrr.rate1, mrr.retries1,
+ 				     mrr.rate2, mrr.retries2,
+ 				     mrr.rate3, mrr.retries3);
++		bf->rcflags = mrr.privflags;
+ 	}
+ 
+ #ifndef ATH_SUPERG_FF
+Index: madwifi-trunk-r3314/ath/if_athvar.h
+===================================================================
+--- madwifi-trunk-r3314.orig/ath/if_athvar.h	2008-04-21 00:50:13.000000000 +0200
++++ madwifi-trunk-r3314/ath/if_athvar.h	2008-04-21 03:31:48.000000000 +0200
+@@ -446,6 +446,7 @@
+ 	u_int16_t bf_flags;				/* tx descriptor flags */
+ 	u_int64_t bf_tsf;
+ 	int16_t bf_channoise;
++	unsigned int rcflags;
+ #ifdef ATH_SUPERG_FF
+ 	/* XXX: combine this with bf_skbaddr if it ever changes to accommodate
+ 	 *      multiple segments.
+Index: madwifi-trunk-r3314/ath_rate/minstrel/minstrel.c
+===================================================================
+--- madwifi-trunk-r3314.orig/ath_rate/minstrel/minstrel.c	2008-04-21 02:50:31.000000000 +0200
++++ madwifi-trunk-r3314/ath_rate/minstrel/minstrel.c	2008-04-21 04:08:36.000000000 +0200
+@@ -336,7 +336,7 @@
+ 			sn->packet_count++;
+ 			sn->random_n = (sn->a * sn->random_n) + sn->b;
+ 			offset = sn->random_n & 0xf;
+-			if ((((100 * sn->sample_count) / (sn->sample_count + sn->packet_count)) < ath_lookaround_rate) && (offset < 2)) {
++			if ((((100 * sn->sample_count) / (sn->packet_count ?: 1)) < ath_lookaround_rate) && (offset < 2)) {
+ 				sn->sample_count++;
+ 				sn->is_sampling = 1;
+ 				if (sn->packet_count >= 10000) {
+@@ -398,11 +398,14 @@
+ 		if (sn->num_rates <= 0)
+ 			return;
+ 
++		mrr->privflags = sn->is_sampling;
+ 		if (sn->is_sampling) {
+ 			sn->is_sampling = 0;
+-			if (sn->rs_sample_rate_slower)
++			if (sn->rs_sample_rate_slower) {
+ 				rc1 = sn->rs_sample_rate;
+-			else
++				if (sn->sample_count > 0)
++					sn->sample_count--;
++			} else
+ 				rc1 = sn->max_tp_rate;
+ 		} else {
+ 			rc1 = sn->max_tp_rate2;
+@@ -525,6 +528,9 @@
+ 		if (tries <= tries1)
+ 			return;
+ 
++		if (bf->rcflags)
++			sn->sample_count++;
++
+ 		if  (tries2 < 0)
+ 			return;
+ 		tries = tries - tries1;
+Index: madwifi-trunk-r3314/net80211/ieee80211_rate.h
+===================================================================
+--- madwifi-trunk-r3314.orig/net80211/ieee80211_rate.h	2008-01-31 03:29:42.000000000 +0100
++++ madwifi-trunk-r3314/net80211/ieee80211_rate.h	2008-04-21 03:30:25.000000000 +0200
+@@ -87,6 +87,7 @@
+ 	int retries2;
+ 	int rate3;
+ 	int retries3;
++	int privflags;
+ };
+ 
+ struct ieee80211_rate_ops {