iw: add support for dynamic distance selection (supported by ath9k now)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42689 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 100 insertions, 6 deletions

diff --git a/package/network/utils/iw/patches/010-dynack.patch b/package/network/utils/iw/patches/010-dynack.patch
new file mode 100644
index 0000000000..00e4bf2467
--- /dev/null
+++ b/package/network/utils/iw/patches/010-dynack.patch
@@ -0,0 +1,94 @@
+
+
+Add auto parameter to set distance command in order to enable ACK timeout
+estimation algorithm (dynack). Dynack is automatically disabled setting valid
+value for coverage class. Currently dynack is supported just by ath9k
+
+This patch is based on "configure dynack through mac80211/cfg80211 stack"
+patchset sent on linux-wireless
+
+Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+---
+ info.c    |  2 ++
+ nl80211.h | 12 ++++++++++++
+ phy.c     | 43 +++++++++++++++++++++++++------------------
+ 3 files changed, 39 insertions(+), 18 deletions(-)
+
+--- a/info.c
++++ b/info.c
+@@ -551,6 +551,8 @@ broken_combination:
+ 			printf("\tDevice supports scan flush.\n");
+ 		if (features & NL80211_FEATURE_AP_SCAN)
+ 			printf("\tDevice supports AP scan.\n");
++		if (features & NL80211_FEATURE_ACKTO_ESTIMATION)
++			printf("\tDevice supports ACK timeout estimation.\n");
+ 	}
+ 
+ 	if (tb_msg[NL80211_ATTR_TDLS_SUPPORT])
+--- a/phy.c
++++ b/phy.c
+@@ -362,39 +362,46 @@ static int handle_distance(struct nl8021
+ 			int argc, char **argv,
+ 			enum id_input id)
+ {
+-	char *end;
+-	unsigned int distance, coverage;
+-
+ 	if (argc != 1)
+ 		return 1;
+ 
+ 	if (!*argv[0])
+ 		return 1;
+ 
+-	distance = strtoul(argv[0], &end, 10);
++	if (strcmp("auto", argv[0]) == 0) {
++		NLA_PUT_FLAG(msg, NL80211_ATTR_WIPHY_DYN_ACK);
++	} else {
++		char *end;
++		unsigned int distance, coverage;
+ 
+-	if (*end)
+-		return 1;
++		distance = strtoul(argv[0], &end, 10);
+ 
+-	/*
+-	 * Divide double the distance by the speed of light in m/usec (300) to
+-	 * get round-trip time in microseconds and then divide the result by
+-	 * three to get coverage class as specified in IEEE 802.11-2007 table
+-	 * 7-27. Values are rounded upwards.
+-	 */
+-	coverage = (distance + 449) / 450;
+-	if (coverage > 255)
+-		return 1;
++		if (*end)
++			return 1;
++
++		/*
++		 * Divide double the distance by the speed of light
++		 * in m/usec (300) to get round-trip time in microseconds
++		 * and then divide the result by three to get coverage class
++		 * as specified in IEEE 802.11-2007 table 7-27.
++		 * Values are rounded upwards.
++		 */
++		coverage = (distance + 449) / 450;
++		if (coverage > 255)
++			return 1;
+ 
+-	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS, coverage);
++		NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS, coverage);
++	}
+ 
+ 	return 0;
+  nla_put_failure:
+ 	return -ENOBUFS;
+ }
+-COMMAND(set, distance, "<distance>",
++COMMAND(set, distance, "<auto|distance>",
+ 	NL80211_CMD_SET_WIPHY, 0, CIB_PHY, handle_distance,
+-	"Set appropriate coverage class for given link distance in meters.\n"
++	"Enable ACK timeout estimation algorithm (dynack) or set appropriate\n"
++	"coverage class for given link distance in meters.\n"
++	"To disable dynack set valid value for coverage class.\n"
+ 	"Valid values: 0 - 114750");
+ 
+ static int handle_txpower(struct nl80211_state *state,
diff --git a/package/network/utils/iw/patches/120-antenna_gain.patch b/package/network/utils/iw/patches/120-antenna_gain.patch
index 2c11a150de..cf6a3fa221 100644
--- a/package/network/utils/iw/patches/120-antenna_gain.patch
+++ b/package/network/utils/iw/patches/120-antenna_gain.patch
@@ -1,6 +1,6 @@
 --- a/phy.c
 +++ b/phy.c
-@@ -488,3 +488,31 @@ COMMAND(set, antenna, "<bitmap> | all | 
+@@ -495,3 +495,31 @@ COMMAND(set, antenna, "<bitmap> | all | 
  	NL80211_CMD_SET_WIPHY, 0, CIB_PHY, handle_antenna,
  	"Set a bitmap of allowed antennas to use for TX and RX.\n"
  	"The driver may reject antenna configurations it cannot support.");
diff --git a/package/network/utils/iw/patches/200-reduce_size.patch b/package/network/utils/iw/patches/200-reduce_size.patch
index 8f5c0eb76d..a6499b3017 100644
--- a/package/network/utils/iw/patches/200-reduce_size.patch
+++ b/package/network/utils/iw/patches/200-reduce_size.patch
@@ -83,15 +83,15 @@
  	if (tb_msg[NL80211_ATTR_FEATURE_FLAGS]) {
  		unsigned int features = nla_get_u32(tb_msg[NL80211_ATTR_FEATURE_FLAGS]);
  
-@@ -552,6 +561,7 @@ broken_combination:
- 		if (features & NL80211_FEATURE_AP_SCAN)
- 			printf("\tDevice supports AP scan.\n");
+@@ -554,6 +563,7 @@ broken_combination:
+ 		if (features & NL80211_FEATURE_ACKTO_ESTIMATION)
+ 			printf("\tDevice supports ACK timeout estimation.\n");
  	}
 +#endif
  
  	if (tb_msg[NL80211_ATTR_TDLS_SUPPORT])
  		printf("\tDevice supports T-DLS.\n");
-@@ -601,6 +611,7 @@ TOPLEVEL(list, NULL, NL80211_CMD_GET_WIP
+@@ -603,6 +613,7 @@ TOPLEVEL(list, NULL, NL80211_CMD_GET_WIP
  	 "List all wireless devices and their capabilities.");
  TOPLEVEL(phy, NULL, NL80211_CMD_GET_WIPHY, NLM_F_DUMP, CIB_NONE, handle_info, NULL);
  
@@ -99,7 +99,7 @@
  static int handle_commands(struct nl80211_state *state,
  			   struct nl_cb *cb, struct nl_msg *msg,
  			   int argc, char **argv, enum id_input id)
-@@ -613,6 +624,7 @@ static int handle_commands(struct nl8021
+@@ -615,6 +626,7 @@ static int handle_commands(struct nl8021
  }
  TOPLEVEL(commands, NULL, NL80211_CMD_GET_WIPHY, 0, CIB_NONE, handle_commands,
  	 "list all known commands and their decimal & hex value");