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add the new compat-wireless for 2.6.27 + multi-rate retry and minstrel patches, rename patches/ for old compat-wireless to patches-old/

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12865 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2008-10-06 12:04:04 +00:00
parent 3e7cd682f4
commit 8ddac8e3cd
11 changed files with 1818 additions and 5 deletions
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21
package/mac80211/Makefile
View File

@ -12,9 +12,16 @@ include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=mac80211
PKG_RELEASE:=1
PKG_VERSION:=2008-08-06
ifneq ($(CONFIG_LINUX_2_6_27),)
PKG_VERSION:=2008-09-28
PKG_SOURCE_URL:=http://www.orbit-lab.org/kernel/compat-wireless-2.6/2008/09
else
PKG_VERSION:=2008-08-06
PKG_SOURCE_URL:=http://www.orbit-lab.org/kernel/compat-wireless-2.6/2008/08
PATCH_DIR:=./patches-old
endif
PKG_SOURCE:=compat-wireless-$(PKG_VERSION).tar.bz2
PKG_SOURCE_URL:=http://www.orbit-lab.org/kernel/compat-wireless-2.6/2008/08/
PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/compat-wireless-$(PKG_VERSION)
include $(INCLUDE_DIR)/package.mk
@ -137,9 +144,11 @@ define KernelPackage/ath5k
endef
BUILDFLAGS:= \
-I$(PKG_BUILD_DIR)/include \
$(foreach opt,$(CONFOPTS),-DCONFIG_$(opt)) \
$(if $(CONFIG_LEDS_TRIGGERS), -DCONFIG_MAC80211_LEDS -DCONFIG_LEDS_TRIGGERS) \
-D__CONFIG_MAC80211_RC_DEFAULT=pid \
$(if $(CONFIG_DEBUG_FS), -DCONFIG_MAC80211_DEBUGFS) \
-D__CONFIG_MAC80211_RC_DEFAULT=minstrel \
MAKE_OPTS:= \
CROSS_COMPILE="$(TARGET_CROSS)" \
@ -148,9 +157,11 @@ MAKE_OPTS:= \
$(foreach opt,$(CONFOPTS),CONFIG_$(opt)=m) \
CONFIG_NL80211=y \
CONFIG_MAC80211_RC_PID=y \
CONFIG_MAC80211_RC_MINSTREL=y \
CONFIG_MAC80211_LEDS=$(CONFIG_LEDS_TRIGGERS) \
LINUXINCLUDE="-I$(PKG_BUILD_DIR)/include -I$(LINUX_DIR)/include -include linux/autoconf.h" \
CONFIG_MAC80211_DEBUGFS=$(CONFIG_DEBUG_FS) \
KLIB_BUILD="$(LINUX_DIR)" \
MODPROBE=:
define Build/Prepare
rm -rf $(PKG_BUILD_DIR)
@ -160,7 +171,7 @@ define Build/Prepare
$(if $(QUILT),touch $(PKG_BUILD_DIR)/.quilt_used)
unzip -jod $(PKG_BUILD_DIR) $(DL_DIR)/$(RT61FW)
unzip -jod $(PKG_BUILD_DIR) $(DL_DIR)/$(RT71FW)
rm -rf $(PKG_BUILD_DIR)/include/linux/ssb
$(if $(CONFIG_TARGET_brcm47xx),rm -rf $(PKG_BUILD_DIR)/include/linux/ssb)
endef
ifneq ($(CONFIG_PACKAGE_kmod-mac80211),)

0
package/mac80211/patches/001-disable_drivers.patch → package/mac80211/patches-old/001-disable_drivers.patch
View File

0
package/mac80211/patches/004-allow-ap-vlan-modes.patch → package/mac80211/patches-old/004-allow-ap-vlan-modes.patch
View File

201
package/mac80211/patches/000-kconfig.patch Normal file
View File

@ -0,0 +1,201 @@
--- /dev/null
+++ b/net/mac80211/Kconfig
@@ -0,0 +1,198 @@
+config MAC80211
+ tristate "Generic IEEE 802.11 Networking Stack (mac80211)"
+ select CRYPTO
+ select CRYPTO_ECB
+ select CRYPTO_ARC4
+ select CRYPTO_AES
+ select CRC32
+ select WIRELESS_EXT
+ select CFG80211
+ ---help---
+ This option enables the hardware independent IEEE 802.11
+ networking stack.
+
+menu "Rate control algorithm selection"
+ depends on MAC80211 != n
+
+config MAC80211_RC_PID
+ bool "PID controller based rate control algorithm" if EMBEDDED
+ default y
+ ---help---
+ This option enables a TX rate control algorithm for
+ mac80211 that uses a PID controller to select the TX
+ rate.
+
+choice
+ prompt "Default rate control algorithm"
+ default MAC80211_RC_DEFAULT_PID
+ ---help---
+ This option selects the default rate control algorithm
+ mac80211 will use. Note that this default can still be
+ overriden through the ieee80211_default_rc_algo module
+ parameter if different algorithms are available.
+
+config MAC80211_RC_DEFAULT_PID
+ bool "PID controller based rate control algorithm"
+ depends on MAC80211_RC_PID
+ ---help---
+ Select the PID controller based rate control as the
+ default rate control algorithm. You should choose
+ this unless you know what you are doing.
+
+endchoice
+
+config MAC80211_RC_DEFAULT
+ string
+ default "pid" if MAC80211_RC_DEFAULT_PID
+ default ""
+
+endmenu
+
+config MAC80211_MESH
+ bool "Enable mac80211 mesh networking (pre-802.11s) support"
+ depends on MAC80211 && EXPERIMENTAL
+ ---help---
+ This options enables support of Draft 802.11s mesh networking.
+ The implementation is based on Draft 1.08 of the Mesh Networking
+ amendment. For more information visit http://o11s.org/.
+
+
+config MAC80211_LEDS
+ bool "Enable LED triggers"
+ depends on MAC80211
+ select NEW_LEDS
+ select LEDS_TRIGGERS
+ ---help---
+ This option enables a few LED triggers for different
+ packet receive/transmit events.
+
+config MAC80211_DEBUGFS
+ bool "Export mac80211 internals in DebugFS"
+ depends on MAC80211 && DEBUG_FS
+ ---help---
+ Select this to see extensive information about
+ the internal state of mac80211 in debugfs.
+
+ Say N unless you know you need this.
+
+menuconfig MAC80211_DEBUG_MENU
+ bool "Select mac80211 debugging features"
+ depends on MAC80211
+ ---help---
+ This option collects various mac80211 debug settings.
+
+config MAC80211_DEBUG_PACKET_ALIGNMENT
+ bool "Enable packet alignment debugging"
+ depends on MAC80211_DEBUG_MENU
+ ---help---
+ This option is recommended for driver authors and strongly
+ discouraged for everybody else, it will trigger a warning
+ when a driver hands mac80211 a buffer that is aligned in
+ a way that will cause problems with the IP stack on some
+ architectures.
+
+ Say N unless you're writing a mac80211 based driver.
+
+config MAC80211_NOINLINE
+ bool "Do not inline TX/RX handlers"
+ depends on MAC80211_DEBUG_MENU
+ ---help---
+ This option affects code generation in mac80211, when
+ selected some functions are marked "noinline" to allow
+ easier debugging of problems in the transmit and receive
+ paths.
+
+ This option increases code size a bit and inserts a lot
+ of function calls in the code, but is otherwise safe to
+ enable.
+
+ If unsure, say N unless you expect to be finding problems
+ in mac80211.
+
+config MAC80211_VERBOSE_DEBUG
+ bool "Verbose debugging output"
+ depends on MAC80211_DEBUG_MENU
+ ---help---
+ Selecting this option causes mac80211 to print out
+ many debugging messages. It should not be selected
+ on production systems as some of the messages are
+ remotely triggerable.
+
+ Do not select this option.
+
+config MAC80211_HT_DEBUG
+ bool "Verbose HT debugging"
+ depends on MAC80211_DEBUG_MENU
+ ---help---
+ This option enables 802.11n High Throughput features
+ debug tracing output.
+
+ It should not be selected on production systems as some
+ of the messages are remotely triggerable.
+
+ Do not select this option.
+
+config MAC80211_TKIP_DEBUG
+ bool "Verbose TKIP debugging"
+ depends on MAC80211_DEBUG_MENU
+ ---help---
+ Selecting this option causes mac80211 to print out
+ very verbose TKIP debugging messages. It should not
+ be selected on production systems as those messages
+ are remotely triggerable.
+
+ Do not select this option.
+
+config MAC80211_IBSS_DEBUG
+ bool "Verbose IBSS debugging"
+ depends on MAC80211_DEBUG_MENU
+ ---help---
+ Selecting this option causes mac80211 to print out
+ very verbose IBSS debugging messages. It should not
+ be selected on production systems as those messages
+ are remotely triggerable.
+
+ Do not select this option.
+
+config MAC80211_VERBOSE_PS_DEBUG
+ bool "Verbose powersave mode debugging"
+ depends on MAC80211_DEBUG_MENU
+ ---help---
+ Selecting this option causes mac80211 to print out very
+ verbose power save mode debugging messages (when mac80211
+ is an AP and has power saving stations.)
+ It should not be selected on production systems as those
+ messages are remotely triggerable.
+
+ Do not select this option.
+
+config MAC80211_VERBOSE_MPL_DEBUG
+ bool "Verbose mesh peer link debugging"
+ depends on MAC80211_DEBUG_MENU
+ depends on MAC80211_MESH
+ ---help---
+ Selecting this option causes mac80211 to print out very
+ verbose mesh peer link debugging messages (when mac80211
+ is taking part in a mesh network).
+ It should not be selected on production systems as those
+ messages are remotely triggerable.
+
+ Do not select this option.
+
+config MAC80211_DEBUG_COUNTERS
+ bool "Extra statistics for TX/RX debugging"
+ depends on MAC80211_DEBUG_MENU
+ depends on MAC80211_DEBUGFS
+ ---help---
+ Selecting this option causes mac80211 to keep additional
+ and very verbose statistics about TX and RX handler use
+ and show them in debugfs.
+
+ If unsure, say N.
+
+config MAC80211_VERBOSE_SPECT_MGMT_DEBUG
+ bool "Verbose Spectrum Management (IEEE 802.11h)debugging"
+ depends on MAC80211_DEBUG_MENU
+ ---help---
+ Say Y here to print out verbose Spectrum Management (IEEE 802.11h)
+ debug messages.

14
package/mac80211/patches/100-define.patch Normal file
View File

@ -0,0 +1,14 @@
--- a/include/net/compat.h
+++ b/include/net/compat.h
@@ -6,6 +6,11 @@
#include <linux/compat_autoconf.h>
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28))
+#include <linux/if_ether.h>
+
+#ifndef ETH_P_PAE
+#define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
+#endif
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)) */
#endif /* LINUX_26_COMPAT_H */

53
package/mac80211/patches/110-ath5k_stat.patch Normal file
View File

@ -0,0 +1,53 @@
This patch removes the unnecessary ATH_STAT_MRRETRY flag and turns
other ATH_STAT_* defines into an enum
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -707,19 +707,6 @@
ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "devid 0x%x\n", pdev->device);
/*
- * Check if the MAC has multi-rate retry support.
- * We do this by trying to setup a fake extended
- * descriptor. MAC's that don't have support will
- * return false w/o doing anything. MAC's that do
- * support it will return true w/o doing anything.
- */
- ret = ah->ah_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0);
- if (ret < 0)
- goto err;
- if (ret > 0)
- __set_bit(ATH_STAT_MRRETRY, sc->status);
-
- /*
* Reset the key cache since some parts do not
* reset the contents on initial power up.
*/
--- a/drivers/net/wireless/ath5k/base.h
+++ b/drivers/net/wireless/ath5k/base.h
@@ -99,6 +99,12 @@
#define ATH_CHAN_MAX (14+14+14+252+20)
#endif
+enum {
+ ATH_STAT_INVALID, /* disable hardware accesses */
+ ATH_STAT_PROMISC,
+ ATH_STAT_LEDSOFT /* enable LED gpio status */
+};
+
/* Software Carrier, keeps track of the driver state
* associated with an instance of a device */
struct ath5k_softc {
@@ -129,10 +135,6 @@
u16 cachelsz; /* cache line size */
DECLARE_BITMAP(status, 4);
-#define ATH_STAT_INVALID 0 /* disable hardware accesses */
-#define ATH_STAT_MRRETRY 1 /* multi-rate retry support */
-#define ATH_STAT_PROMISC 2
-#define ATH_STAT_LEDSOFT 3 /* enable LED gpio status */
unsigned int filter_flags; /* HW flags, AR5K_RX_FILTER_* */
unsigned int curmode; /* current phy mode */

183
package/mac80211/patches/200-hwkey_len.patch Normal file
View File

@ -0,0 +1,183 @@
Free up 2 bytes in skb->cb to be used for multi-rate retry later.
Move iv_len and icv_len initialization into key alloc.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -337,8 +337,6 @@
unsigned long jiffies;
s8 rts_cts_rate_idx, alt_retry_rate_idx;
u8 retry_limit;
- u8 icv_len;
- u8 iv_len;
} control;
struct {
u64 ampdu_ack_map;
@@ -635,6 +633,8 @@
*/
struct ieee80211_key_conf {
enum ieee80211_key_alg alg;
+ u8 icv_len;
+ u8 iv_len;
u8 hw_key_idx;
u8 flags;
s8 keyidx;
--- a/drivers/net/wireless/b43/xmit.c
+++ b/drivers/net/wireless/b43/xmit.c
@@ -252,7 +252,7 @@
}
/* Hardware appends ICV. */
- plcp_fragment_len += info->control.icv_len;
+ plcp_fragment_len += info->control.hw_key->icv_len;
key_idx = b43_kidx_to_fw(dev, key_idx);
mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
@@ -260,7 +260,7 @@
mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
B43_TXH_MAC_KEYALG;
wlhdr_len = ieee80211_hdrlen(fctl);
- iv_len = min((size_t) info->control.iv_len,
+ iv_len = min((size_t) info->control.hw_key->iv_len,
ARRAY_SIZE(txhdr->iv));
memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
}
--- a/drivers/net/wireless/b43legacy/xmit.c
+++ b/drivers/net/wireless/b43legacy/xmit.c
@@ -243,7 +243,7 @@
if (key->enabled) {
/* Hardware appends ICV. */
- plcp_fragment_len += info->control.icv_len;
+ plcp_fragment_len += info->control.hw_key->icv_len;
key_idx = b43legacy_kidx_to_fw(dev, key_idx);
mac_ctl |= (key_idx << B43legacy_TX4_MAC_KEYIDX_SHIFT) &
@@ -252,7 +252,7 @@
B43legacy_TX4_MAC_KEYALG_SHIFT) &
B43legacy_TX4_MAC_KEYALG;
wlhdr_len = ieee80211_hdrlen(wlhdr->frame_control);
- iv_len = min((size_t)info->control.iv_len,
+ iv_len = min((size_t)info->control.hw_key->iv_len,
ARRAY_SIZE(txhdr->iv));
memcpy(txhdr->iv, ((u8 *)wlhdr) + wlhdr_len, iv_len);
} else {
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -313,9 +313,6 @@
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- info->control.iv_len = WEP_IV_LEN;
- info->control.icv_len = WEP_ICV_LEN;
-
if (!(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
if (ieee80211_wep_encrypt(tx->local, skb, tx->key))
return -1;
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -152,9 +152,6 @@
int len, tail;
u8 *pos;
- info->control.icv_len = TKIP_ICV_LEN;
- info->control.iv_len = TKIP_IV_LEN;
-
if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
!(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
/* hwaccel - with no need for preallocated room for IV/ICV */
@@ -374,9 +371,6 @@
u8 *pos, *pn;
int i;
- info->control.icv_len = CCMP_MIC_LEN;
- info->control.iv_len = CCMP_HDR_LEN;
-
if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
!(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
/* hwaccel - with no need for preallocated room for CCMP "
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -1164,7 +1164,7 @@
if (info->control.hw_key) {
keyidx = info->control.hw_key->hw_key_idx;
- pktlen += info->control.icv_len;
+ pktlen += info->control.hw_key->icv_len;
}
ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL,
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -237,7 +237,7 @@
if (tx_info->control.hw_key) {
txctl->keyix = tx_info->control.hw_key->hw_key_idx;
- txctl->frmlen += tx_info->control.icv_len;
+ txctl->frmlen += tx_info->control.hw_key->icv_len;
if (tx_info->control.hw_key->alg == ALG_WEP)
txctl->keytype = ATH9K_KEY_TYPE_WEP;
--- a/drivers/net/wireless/rt2x00/rt2x00crypto.c
+++ b/drivers/net/wireless/rt2x00/rt2x00crypto.c
@@ -56,10 +56,10 @@
* note that these lengths should only be added when
* mac80211 does not generate it.
*/
- overhead += tx_info->control.icv_len;
+ overhead += key->icv_len;
if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_IV))
- overhead += tx_info->control.iv_len;
+ overhead += key->iv_len;
if (!(key->flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) {
if (key->alg == ALG_TKIP)
--- a/drivers/net/wireless/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/rt2x00/rt2x00queue.c
@@ -374,7 +374,7 @@
struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX);
struct txentry_desc txdesc;
struct skb_frame_desc *skbdesc;
- unsigned int iv_len = IEEE80211_SKB_CB(skb)->control.iv_len;
+ unsigned int iv_len;
if (unlikely(rt2x00queue_full(queue)))
return -EINVAL;
@@ -410,8 +410,11 @@
* the frame so we can provide it to the driver seperately.
*/
if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) &&
- !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags))
+ !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags) &&
+ (IEEE80211_SKB_CB(skb)->control.hw_key != NULL)) {
+ iv_len = IEEE80211_SKB_CB(skb)->control.hw_key->iv_len;
rt2x00crypto_tx_remove_iv(skb, iv_len);
+ }
/*
* It could be possible that the queue was corrupted and this
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -281,6 +281,20 @@
key->conf.alg = alg;
key->conf.keyidx = idx;
key->conf.keylen = key_len;
+ switch (alg) {
+ case ALG_WEP:
+ key->conf.iv_len = WEP_IV_LEN;
+ key->conf.icv_len = WEP_ICV_LEN;
+ break;
+ case ALG_TKIP:
+ key->conf.iv_len = TKIP_IV_LEN;
+ key->conf.icv_len = TKIP_ICV_LEN;
+ break;
+ case ALG_CCMP:
+ key->conf.iv_len = CCMP_HDR_LEN;
+ key->conf.icv_len = CCMP_MIC_LEN;
+ break;
+ }
memcpy(key->conf.key, key_data, key_len);
INIT_LIST_HEAD(&key->list);
INIT_LIST_HEAD(&key->todo);

183
package/mac80211/patches/210-mrr.patch Normal file
View File

@ -0,0 +1,183 @@
This patch adjusts the rate control API to allow multi-rate retry
if supported by the driver. The ieee80211_hw struct specifies how
many alternate rate selections the driver supports.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -292,6 +292,20 @@
#define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \
(IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *))
+/* maximum number of alternate rate retry stages */
+#define IEEE80211_TX_MAX_ALTRATE 3
+
+/**
+ * struct ieee80211_tx_altrate - alternate rate selection/status
+ *
+ * @rate_idx: rate index to attempt to send with
+ * @limit: number of retries before fallback
+ */
+struct ieee80211_tx_altrate {
+ s8 rate_idx;
+ u8 limit;
+};
+
/**
* struct ieee80211_tx_info - skb transmit information
*
@@ -335,12 +349,14 @@
struct ieee80211_key_conf *hw_key;
struct ieee80211_sta *sta;
unsigned long jiffies;
- s8 rts_cts_rate_idx, alt_retry_rate_idx;
+ s8 rts_cts_rate_idx;
u8 retry_limit;
+ struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE];
} control;
struct {
u64 ampdu_ack_map;
int ack_signal;
+ struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE + 1];
u8 retry_count;
bool excessive_retries;
u8 ampdu_ack_len;
@@ -828,6 +844,9 @@
* within &struct ieee80211_vif.
* @sta_data_size: size (in bytes) of the drv_priv data area
* within &struct ieee80211_sta.
+ *
+ * @max_altrates: maximum number of alternate rate retry stages
+ * @max_altrate_tries: maximum number of tries for each stage
*/
struct ieee80211_hw {
struct ieee80211_conf conf;
@@ -844,6 +863,8 @@
u16 ampdu_queues;
u16 max_listen_interval;
s8 max_signal;
+ u8 max_altrates;
+ u8 max_altrate_tries;
};
struct ieee80211_hw *wiphy_to_hw(struct wiphy *wiphy);
@@ -900,11 +921,11 @@
static inline struct ieee80211_rate *
ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
- const struct ieee80211_tx_info *c)
+ const struct ieee80211_tx_info *c, int idx)
{
- if (c->control.alt_retry_rate_idx < 0)
+ if (c->control.retries[idx].rate_idx < 0)
return NULL;
- return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx];
+ return &hw->wiphy->bands[c->band]->bitrates[c->control.retries[idx].rate_idx];
}
/**
--- a/drivers/net/wireless/b43/xmit.c
+++ b/drivers/net/wireless/b43/xmit.c
@@ -208,7 +208,7 @@
txrate = ieee80211_get_tx_rate(dev->wl->hw, info);
rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB;
rate_ofdm = b43_is_ofdm_rate(rate);
- fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : txrate;
+ fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : txrate;
rate_fb = fbrate->hw_value;
rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);
--- a/drivers/net/wireless/b43legacy/xmit.c
+++ b/drivers/net/wireless/b43legacy/xmit.c
@@ -210,7 +210,7 @@
rate = tx_rate->hw_value;
rate_ofdm = b43legacy_is_ofdm_rate(rate);
- rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : tx_rate;
+ rate_fb = ieee80211_get_alt_retry_rate(dev->wl->hw, info, 0) ? : tx_rate;
rate_fb_ofdm = b43legacy_is_ofdm_rate(rate_fb->hw_value);
txhdr->mac_frame_ctl = wlhdr->frame_control;
--- a/drivers/net/wireless/rtl8180_dev.c
+++ b/drivers/net/wireless/rtl8180_dev.c
@@ -292,8 +292,8 @@
entry->plcp_len = cpu_to_le16(plcp_len);
entry->tx_buf = cpu_to_le32(mapping);
entry->frame_len = cpu_to_le32(skb->len);
- entry->flags2 = info->control.alt_retry_rate_idx >= 0 ?
- ieee80211_get_alt_retry_rate(dev, info)->bitrate << 4 : 0;
+ entry->flags2 = info->control.retries[0].rate_idx >= 0 ?
+ ieee80211_get_alt_retry_rate(dev, info, 0)->bitrate << 4 : 0;
entry->retry_limit = info->control.retry_limit;
entry->flags = cpu_to_le32(tx_flags);
__skb_queue_tail(&ring->queue, skb);
@@ -855,6 +855,7 @@
priv = dev->priv;
priv->pdev = pdev;
+ dev->max_altrates = 1;
SET_IEEE80211_DEV(dev, &pdev->dev);
pci_set_drvdata(pdev, dev);
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -454,15 +454,16 @@
if (unlikely(rsel.probe_idx >= 0)) {
info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
tx->flags |= IEEE80211_TX_PROBE_LAST_FRAG;
- info->control.alt_retry_rate_idx = tx->rate_idx;
+ info->control.retries[0].rate_idx = tx->rate_idx;
+ info->control.retries[0].limit = tx->local->hw.max_altrate_tries;
tx->rate_idx = rsel.probe_idx;
- } else
- info->control.alt_retry_rate_idx = -1;
+ } else if (info->control.retries[0].limit == 0)
+ info->control.retries[0].rate_idx = -1;
if (unlikely(tx->rate_idx < 0))
return TX_DROP;
} else
- info->control.alt_retry_rate_idx = -1;
+ info->control.retries[0].rate_idx = -1;
if (tx->sdata->bss_conf.use_cts_prot &&
(tx->flags & IEEE80211_TX_FRAGMENTED) && (rsel.nonerp_idx >= 0)) {
@@ -521,7 +522,7 @@
* frames.
* TODO: The last fragment could still use multiple retry
* rates. */
- info->control.alt_retry_rate_idx = -1;
+ info->control.retries[0].rate_idx = -1;
}
/* Use CTS protection for unicast frames sent using extended rates if
@@ -551,7 +552,7 @@
int idx;
/* Do not use multiple retry rates when using RTS/CTS */
- info->control.alt_retry_rate_idx = -1;
+ info->control.retries[0].rate_idx = -1;
/* Use min(data rate, max base rate) as CTS/RTS rate */
rate = &sband->bitrates[tx->rate_idx];
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -4588,6 +4588,7 @@
BIT(NL80211_IFTYPE_ADHOC);
hw->queues = b43_modparam_qos ? 4 : 1;
+ hw->max_altrates = 1;
SET_IEEE80211_DEV(hw, dev->dev);
if (is_valid_ether_addr(sprom->et1mac))
SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
--- a/drivers/net/wireless/b43legacy/main.c
+++ b/drivers/net/wireless/b43legacy/main.c
@@ -3710,6 +3710,7 @@
BIT(NL80211_IFTYPE_WDS) |
BIT(NL80211_IFTYPE_ADHOC);
hw->queues = 1; /* FIXME: hardware has more queues */
+ hw->max_altrates = 1;
SET_IEEE80211_DEV(hw, dev->dev);
if (is_valid_ether_addr(sprom->et1mac))
SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);

208
package/mac80211/patches/250-ath5k_mrr.patch Normal file
View File

@ -0,0 +1,208 @@
Clean up the tx status reporting, fix retry counters (short retries are
virtual collisions, not actual retries). Implement multi-rate retry
support.
This also fixes strong throughput fluctuations with rc80211_pid
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -530,6 +530,12 @@
goto err_irq;
}
+ /* set up multi-rate retry capabilities */
+ if (sc->ah->ah_version == AR5K_AR5212) {
+ hw->max_altrates = 3;
+ hw->max_altrate_tries = 11;
+ }
+
/* Finish private driver data initialization */
ret = ath5k_attach(pdev, hw);
if (ret)
@@ -1149,7 +1155,9 @@
struct sk_buff *skb = bf->skb;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
- int ret;
+ struct ieee80211_rate *rate;
+ unsigned int mrr_rate[3], mrr_tries[3];
+ int i, ret;
flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
@@ -1174,6 +1182,22 @@
if (ret)
goto err_unmap;
+ memset(mrr_rate, 0, sizeof(mrr_rate));
+ memset(mrr_tries, 0, sizeof(mrr_tries));
+ for (i = 0; i < 3; i++) {
+ rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
+ if (!rate)
+ break;
+
+ mrr_rate[i] = rate->hw_value;
+ mrr_tries[i] = info->control.retries[i].limit;
+ }
+
+ ah->ah_setup_mrr_tx_desc(ah, ds,
+ mrr_rate[0], mrr_tries[0],
+ mrr_rate[1], mrr_tries[1],
+ mrr_rate[2], mrr_tries[2]);
+
ds->ds_link = 0;
ds->ds_data = bf->skbaddr;
@@ -1790,7 +1814,7 @@
struct ath5k_desc *ds;
struct sk_buff *skb;
struct ieee80211_tx_info *info;
- int ret;
+ int i, ret;
spin_lock(&txq->lock);
list_for_each_entry_safe(bf, bf0, &txq->q, list) {
@@ -1812,7 +1836,25 @@
pci_unmap_single(sc->pdev, bf->skbaddr, skb->len,
PCI_DMA_TODEVICE);
- info->status.retry_count = ts.ts_shortretry + ts.ts_longretry / 6;
+ memset(&info->status, 0, sizeof(info->status));
+ info->tx_rate_idx = ath5k_hw_to_driver_rix(sc,
+ ts.ts_rate[ts.ts_final_idx]);
+ info->status.retry_count = ts.ts_longretry;
+
+ for (i = 0; i < 4; i++) {
+ struct ieee80211_tx_altrate *r =
+ &info->status.retries[i];
+
+ if (ts.ts_rate[i]) {
+ r->rate_idx = ath5k_hw_to_driver_rix(sc, ts.ts_rate[i]);
+ r->limit = ts.ts_retry[i];
+ } else {
+ r->rate_idx = -1;
+ r->limit = 0;
+ }
+ }
+
+ info->status.excessive_retries = 0;
if (unlikely(ts.ts_status)) {
sc->ll_stats.dot11ACKFailureCount++;
if (ts.ts_status & AR5K_TXERR_XRETRY)
--- a/drivers/net/wireless/ath5k/desc.c
+++ b/drivers/net/wireless/ath5k/desc.c
@@ -318,6 +318,15 @@
return 0;
}
+/* no mrr support for cards older than 5212 */
+static int
+ath5k_hw_setup_no_mrr(struct ath5k_hw *ah, struct ath5k_desc *desc,
+ unsigned int tx_rate1, u_int tx_tries1, u_int tx_rate2,
+ u_int tx_tries2, unsigned int tx_rate3, u_int tx_tries3)
+{
+ return 0;
+}
+
/*
* Proccess the tx status descriptor on 5210/5211
*/
@@ -352,8 +361,10 @@
AR5K_DESC_TX_STATUS1_ACK_SIG_STRENGTH);
ts->ts_antenna = 1;
ts->ts_status = 0;
- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_0,
+ ts->ts_rate[0] = AR5K_REG_MS(tx_ctl->tx_control_0,
AR5K_2W_TX_DESC_CTL0_XMIT_RATE);
+ ts->ts_retry[0] = ts->ts_longretry;
+ ts->ts_final_idx = 0;
if (!(tx_status->tx_status_0 & AR5K_DESC_TX_STATUS0_FRAME_XMIT_OK)) {
if (tx_status->tx_status_0 &
@@ -405,29 +416,43 @@
AR5K_DESC_TX_STATUS1_XMIT_ANTENNA) ? 2 : 1;
ts->ts_status = 0;
- switch (AR5K_REG_MS(tx_status->tx_status_1,
- AR5K_DESC_TX_STATUS1_FINAL_TS_INDEX)) {
- case 0:
- ts->ts_rate = tx_ctl->tx_control_3 &
- AR5K_4W_TX_DESC_CTL3_XMIT_RATE0;
- break;
+ ts->ts_final_idx = AR5K_REG_MS(tx_status->tx_status_1,
+ AR5K_DESC_TX_STATUS1_FINAL_TS_INDEX);
+
+ /* The longretry counter has the number of un-acked retries
+ * for the final rate. To get the total number of retries
+ * we have to add the retry counters for the other rates
+ * as well
+ */
+ ts->ts_retry[ts->ts_final_idx] = ts->ts_longretry;
+ switch (ts->ts_final_idx) {
+ case 3:
+ ts->ts_rate[3] = AR5K_REG_MS(tx_ctl->tx_control_3,
+ AR5K_4W_TX_DESC_CTL3_XMIT_RATE3);
+
+ ts->ts_retry[2] = AR5K_REG_MS(tx_ctl->tx_control_2,
+ AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2);
+ ts->ts_longretry += ts->ts_retry[2];
+ /* fall through */
+ case 2:
+ ts->ts_rate[2] = AR5K_REG_MS(tx_ctl->tx_control_3,
+ AR5K_4W_TX_DESC_CTL3_XMIT_RATE2);
+
+ ts->ts_retry[1] = AR5K_REG_MS(tx_ctl->tx_control_2,
+ AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1);
+ ts->ts_longretry += ts->ts_retry[1];
+ /* fall through */
case 1:
- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
+ ts->ts_rate[1] = AR5K_REG_MS(tx_ctl->tx_control_3,
AR5K_4W_TX_DESC_CTL3_XMIT_RATE1);
- ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
+
+ ts->ts_retry[0] = AR5K_REG_MS(tx_ctl->tx_control_2,
AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1);
- break;
- case 2:
- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
- AR5K_4W_TX_DESC_CTL3_XMIT_RATE2);
- ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
- AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2);
- break;
- case 3:
- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
- AR5K_4W_TX_DESC_CTL3_XMIT_RATE3);
- ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
- AR5K_4W_TX_DESC_CTL2_XMIT_TRIES3);
+ ts->ts_longretry += ts->ts_retry[0];
+ /* fall through */
+ case 0:
+ ts->ts_rate[0] = tx_ctl->tx_control_3 &
+ AR5K_4W_TX_DESC_CTL3_XMIT_RATE0;
break;
}
@@ -653,7 +678,7 @@
} else {
ah->ah_setup_rx_desc = ath5k_hw_setup_rx_desc;
ah->ah_setup_tx_desc = ath5k_hw_setup_2word_tx_desc;
- ah->ah_setup_mrr_tx_desc = ath5k_hw_setup_mrr_tx_desc;
+ ah->ah_setup_mrr_tx_desc = ath5k_hw_setup_no_mrr;
ah->ah_proc_tx_desc = ath5k_hw_proc_2word_tx_status;
}
--- a/drivers/net/wireless/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath5k/ath5k.h
@@ -418,7 +418,9 @@
u16 ts_seqnum;
u16 ts_tstamp;
u8 ts_status;
- u8 ts_rate;
+ u8 ts_rate[4];
+ u8 ts_retry[4];
+ u8 ts_final_idx;
s8 ts_rssi;
u8 ts_shortretry;
u8 ts_longretry;

32
package/mac80211/patches/299-compat_minstrel.patch Normal file
View File

@ -0,0 +1,32 @@
--- a/config.mk
+++ b/config.mk
@@ -47,8 +47,9 @@
endif # build check
endif # kernel Makefile check
-CONFIG_MAC80211_RC_DEFAULT=pid
+CONFIG_MAC80211_RC_DEFAULT=minstrel
CONFIG_MAC80211_RC_PID=y
+CONFIG_MAC80211_RC_MINSTREL=y
# enable mesh networking too
CONFIG_MAC80211_MESH=y
--- a/include/linux/compat_autoconf.h
+++ b/include/linux/compat_autoconf.h
@@ -18,11 +18,14 @@
#define CONFIG_MAC80211 1
#endif /* CONFIG_MAC80211 */
#ifndef CONFIG_MAC80211_RC_DEFAULT
-#define CONFIG_MAC80211_RC_DEFAULT "pid"
-#endif /* CONFIG_MAC80211_RC_DEFAULT */
+#define CONFIG_MAC80211_RC_DEFAULT "minstrel"
+#endif /* CONFIG_MAC80211_RC_DEFAULT */
#ifndef CONFIG_MAC80211_RC_PID
#define CONFIG_MAC80211_RC_PID 1
#endif /* CONFIG_MAC80211_RC_PID */
+#ifndef CONFIG_MAC80211_RC_MINSTREL
+#define CONFIG_MAC80211_RC_MINSTREL 1
+#endif /* CONFIG_MAC80211_RC_MINSTREL */
#ifndef CONFIG_MAC80211_MESH
#define CONFIG_MAC80211_MESH 1
#endif /* CONFIG_MAC80211_MESH */

928
package/mac80211/patches/300-minstrel.patch Normal file
View File

@ -0,0 +1,928 @@
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel.c
@@ -0,0 +1,583 @@
+/*
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on minstrel.c:
+ * Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
+ * Sponsored by Indranet Technologies Ltd
+ *
+ * Based on sample.c:
+ * Copyright (c) 2005 John Bicket
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ * redistribution must be conditioned upon including a substantially
+ * similar Disclaimer requirement for further binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ */
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/debugfs.h>
+#include <linux/random.h>
+#include <linux/ieee80211.h>
+#include <net/mac80211.h>
+#include "rate.h"
+#include "rc80211_minstrel.h"
+
+#define SAMPLE_COLUMNS 10
+#define SAMPLE_TBL(_mi, _idx, _col) \
+ _mi->sample_table[(_idx * SAMPLE_COLUMNS) + _col]
+
+/* convert mac80211 rate index to local array index */
+static inline int
+rix_to_ndx(struct minstrel_sta_info *mi, int rix)
+{
+ int i = rix;
+ for (i = rix; i >= 0; i--)
+ if (mi->r[i].rix == rix)
+ break;
+ WARN_ON(mi->r[i].rix != rix);
+ return i;
+}
+
+static inline bool
+use_low_rate(struct sk_buff *skb)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ u16 fc;
+
+ fc = le16_to_cpu(hdr->frame_control);
+
+ return ((info->flags & IEEE80211_TX_CTL_NO_ACK) ||
+ (fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
+ is_multicast_ether_addr(hdr->addr1));
+}
+
+
+static void
+minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
+{
+ u32 max_tp = 0, index_max_tp = 0, index_max_tp2 = 0;
+ u32 max_prob = 0, index_max_prob = 0;
+ u32 usecs;
+ u32 p;
+ int i;
+
+ mi->stats_update = jiffies;
+ for (i = 0; i < mi->n_rates; i++) {
+ struct minstrel_rate *mr = &mi->r[i];
+
+ usecs = mr->perfect_tx_time;
+ if (!usecs)
+ usecs = 1000000;
+
+ /* To avoid rounding issues, probabilities scale from 0 (0%)
+ * to 18000 (100%) */
+ if (mr->attempts) {
+ p = (mr->success * 18000) / mr->attempts;
+ mr->succ_hist += mr->success;
+ mr->att_hist += mr->attempts;
+ mr->cur_prob = p;
+ p = ((p * (100 - mp->ewma_level)) + (mr->probability *
+ mp->ewma_level)) / 100;
+ mr->probability = p;
+ mr->cur_tp = p * (1000000 / usecs);
+ }
+
+ mr->last_success = mr->success;
+ mr->last_attempts = mr->attempts;
+ mr->success = 0;
+ mr->attempts = 0;
+
+ /* Sample less often below the 10% chance of success.
+ * Sample less often above the 95% chance of success. */
+ if ((mr->probability > 17100) || (mr->probability < 1800)) {
+ mr->adjusted_retry_count = mr->retry_count >> 1;
+ if (mr->adjusted_retry_count > 2)
+ mr->adjusted_retry_count = 2;
+ } else {
+ mr->adjusted_retry_count = mr->retry_count;
+ }
+ if (!mr->adjusted_retry_count)
+ mr->adjusted_retry_count = 2;
+ }
+
+ for (i = 0; i < mi->n_rates; i++) {
+ struct minstrel_rate *mr = &mi->r[i];
+ if (max_tp < mr->cur_tp) {
+ index_max_tp = i;
+ max_tp = mr->cur_tp;
+ }
+ if (max_prob < mr->probability) {
+ index_max_prob = i;
+ max_prob = mr->probability;
+ }
+ }
+
+ max_tp = 0;
+ for (i = 0; i < mi->n_rates; i++) {
+ struct minstrel_rate *mr = &mi->r[i];
+
+ if (i == index_max_tp)
+ continue;
+
+ if (max_tp < mr->cur_tp) {
+ index_max_tp2 = i;
+ max_tp = mr->cur_tp;
+ }
+ }
+ mi->max_tp_rate = index_max_tp;
+ mi->max_tp_rate2 = index_max_tp2;
+ mi->max_prob_rate = index_max_prob;
+}
+
+static void
+minstrel_tx_status(void *priv, struct ieee80211_supported_band *sband,
+ struct ieee80211_sta *sta, void *priv_sta,
+ struct sk_buff *skb)
+{
+ struct minstrel_sta_info *mi = priv_sta;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_tx_altrate *ar = info->status.retries;
+ struct minstrel_priv *mp = priv;
+ int i, ndx, tries;
+ int success = 0;
+
+ if (!info->status.excessive_retries)
+ success = 1;
+
+ if (!mp->has_mrr || (ar[0].rate_idx < 0)) {
+ ndx = rix_to_ndx(mi, info->tx_rate_idx);
+ tries = info->status.retry_count + 1;
+ mi->r[ndx].success += success;
+ mi->r[ndx].attempts += tries;
+ return;
+ }
+
+ for (i = 0; i < 4; i++) {
+ if (ar[i].rate_idx < 0)
+ break;
+
+ ndx = rix_to_ndx(mi, ar[i].rate_idx);
+ mi->r[ndx].attempts += ar[i].limit + 1;
+
+ if ((i != 3) && (ar[i + 1].rate_idx < 0))
+ mi->r[ndx].success += success;
+ }
+
+ if ((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) && (i >= 0))
+ mi->sample_count++;
+
+ if (mi->sample_deferred > 0)
+ mi->sample_deferred--;
+}
+
+
+static inline unsigned int
+minstrel_get_retry_count(struct minstrel_rate *mr,
+ struct ieee80211_tx_info *info)
+{
+ unsigned int retry = mr->adjusted_retry_count;
+
+ if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
+ retry = max(2U, min(mr->retry_count_rtscts, retry));
+ else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)
+ retry = max(2U, min(mr->retry_count_cts, retry));
+ return retry;
+}
+
+
+static int
+minstrel_get_next_sample(struct minstrel_sta_info *mi)
+{
+ unsigned int sample_ndx;
+ sample_ndx = SAMPLE_TBL(mi, mi->sample_idx, mi->sample_column);
+ mi->sample_idx++;
+ if (mi->sample_idx > (mi->n_rates - 2)) {
+ mi->sample_idx = 0;
+ mi->sample_column++;
+ if (mi->sample_column >= SAMPLE_COLUMNS)
+ mi->sample_column = 0;
+ }
+ return sample_ndx;
+}
+
+void
+minstrel_get_rate(void *priv, struct ieee80211_supported_band *sband,
+ struct ieee80211_sta *sta, void *priv_sta,
+ struct sk_buff *skb, struct rate_selection *sel)
+{
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct minstrel_sta_info *mi = priv_sta;
+ struct minstrel_priv *mp = priv;
+ struct ieee80211_tx_altrate *ar = info->control.retries;
+ unsigned int ndx, sample_ndx = 0;
+ bool mrr;
+ bool sample_slower = false;
+ bool sample = false;
+ int i, delta;
+ int mrr_ndx[3];
+ int sample_rate;
+
+ if (!sta || !mi || use_low_rate(skb)) {
+ sel->rate_idx = rate_lowest_index(sband, sta);
+ return;
+ }
+
+ mrr = mp->has_mrr;
+
+ /* mac80211 does not allow mrr for RTS/CTS */
+ if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) ||
+ (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
+ mrr = false;
+
+ if (time_after(jiffies, mi->stats_update + (mp->update_interval *
+ HZ) / 1000))
+ minstrel_update_stats(mp, mi);
+
+ ndx = mi->max_tp_rate;
+
+ if (mrr)
+ sample_rate = mp->lookaround_rate_mrr;
+ else
+ sample_rate = mp->lookaround_rate;
+
+ mi->packet_count++;
+ delta = (mi->packet_count * sample_rate / 100) -
+ (mi->sample_count + mi->sample_deferred / 2);
+
+ /* delta > 0: sampling required */
+ if (delta > 0) {
+ if (mi->packet_count >= 10000) {
+ mi->sample_deferred = 0;
+ mi->sample_count = 0;
+ mi->packet_count = 0;
+ } else if (delta > mi->n_rates * 2) {
+ /* With multi-rate retry, not every planned sample
+ * attempt actually gets used, due to the way the retry
+ * chain is set up - [max_tp,sample,prob,lowest] for
+ * sample_rate < max_tp.
+ *
+ * If there's too much sampling backlog and the link
+ * starts getting worse, minstrel would start bursting
+ * out lots of sampling frames, which would result
+ * in a large throughput loss. */
+ mi->sample_count += (delta - mi->n_rates * 2);
+ }
+
+ sample_ndx = minstrel_get_next_sample(mi);
+ sample = true;
+ sample_slower = mrr && (mi->r[sample_ndx].perfect_tx_time >
+ mi->r[ndx].perfect_tx_time);
+
+ if (!sample_slower) {
+ ndx = sample_ndx;
+ mi->sample_count++;
+ } else {
+ /* Only use IEEE80211_TX_CTL_RATE_CTRL_PROBE to mark
+ * packets that have the sampling rate deferred to the
+ * second MRR stage. Increase the sample counter only
+ * if the deferred sample rate was actually used.
+ * Use the sample_deferred counter to make sure that
+ * the sampling is not done in large bursts */
+ info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
+ mi->sample_deferred++;
+ }
+ }
+ sel->rate_idx = mi->r[ndx].rix;
+ info->control.retry_limit = minstrel_get_retry_count(&mi->r[ndx], info);
+
+ if (!mrr) {
+ ar[0].rate_idx = mi->lowest_rix;
+ ar[0].limit = mp->max_retry;
+ ar[1].rate_idx = -1;
+ return;
+ }
+
+ /* MRR setup */
+ if (sample) {
+ if (sample_slower)
+ mrr_ndx[0] = sample_ndx;
+ else
+ mrr_ndx[0] = mi->max_tp_rate;
+ } else {
+ mrr_ndx[0] = mi->max_tp_rate2;
+ }
+ mrr_ndx[1] = mi->max_prob_rate;
+ mrr_ndx[2] = 0;
+ for (i = 0; i < 3; i++) {
+ ar[i].rate_idx = mi->r[mrr_ndx[i]].rix;
+ ar[i].limit = mi->r[mrr_ndx[i]].adjusted_retry_count;
+ }
+}
+
+
+static void
+calc_rate_durations(struct minstrel_sta_info *mi, struct ieee80211_local *local,
+ struct minstrel_rate *d, struct ieee80211_rate *rate)
+{
+ int erp = !!(rate->flags & IEEE80211_RATE_ERP_G);
+
+ d->perfect_tx_time = ieee80211_frame_duration(local, 1200,
+ rate->bitrate, erp, 1);
+ d->ack_time = ieee80211_frame_duration(local, 10,
+ rate->bitrate, erp, 1);
+}
+
+static void
+init_sample_table(struct minstrel_sta_info *mi)
+{
+ unsigned int i, col, new_idx;
+ unsigned int n_srates = mi->n_rates - 1;
+ u8 rnd[8];
+
+ mi->sample_column = 0;
+ mi->sample_idx = 0;
+ memset(mi->sample_table, 0, SAMPLE_COLUMNS * mi->n_rates);
+
+ for (col = 0; col < SAMPLE_COLUMNS; col++) {
+ for (i = 0; i < n_srates; i++) {
+ get_random_bytes(rnd, sizeof(rnd));
+ new_idx = (i + rnd[i & 7]) % n_srates;
+
+ while (SAMPLE_TBL(mi, new_idx, col) != 0)
+ new_idx = (new_idx + 1) % n_srates;
+
+ /* Don't sample the slowest rate (i.e. slowest base
+ * rate). We must presume that the slowest rate works
+ * fine, or else other management frames will also be
+ * failing and the link will break */
+ SAMPLE_TBL(mi, new_idx, col) = i + 1;
+ }
+ }
+}
+
+static void
+minstrel_rate_init(void *priv, struct ieee80211_supported_band *sband,
+ struct ieee80211_sta *sta, void *priv_sta)
+{
+ struct minstrel_sta_info *mi = priv_sta;
+ struct minstrel_priv *mp = priv;
+ struct minstrel_rate *mr_ctl;
+ unsigned int i, n = 0;
+ unsigned int t_slot = 9; /* FIXME: get real slot time */
+
+ mi->lowest_rix = rate_lowest_index(sband, sta);
+ mr_ctl = &mi->r[rix_to_ndx(mi, mi->lowest_rix)];
+ mi->sp_ack_dur = mr_ctl->ack_time;
+
+ for (i = 0; i < sband->n_bitrates; i++) {
+ struct minstrel_rate *mr = &mi->r[n];
+ unsigned int tx_time = 0, tx_time_cts = 0, tx_time_rtscts = 0;
+ unsigned int tx_time_single;
+ unsigned int cw = mp->cw_min;
+
+ if (!rate_supported(sta, sband->band, i))
+ continue;
+ n++;
+ memset(mr, 0, sizeof(*mr));
+
+ mr->rix = i;
+ mr->bitrate = sband->bitrates[i].bitrate / 5;
+ calc_rate_durations(mi, hw_to_local(mp->hw), mr,
+ &sband->bitrates[i]);
+
+ /* calculate maximum number of retransmissions before
+ * fallback (based on maximum segment size) */
+ mr->retry_count = 1;
+ mr->retry_count_cts = 1;
+ mr->retry_count_rtscts = 1;
+ tx_time = mr->perfect_tx_time + mi->sp_ack_dur;
+ do {
+ /* add one retransmission */
+ tx_time_single = mr->ack_time + mr->perfect_tx_time;
+
+ /* contention window */
+ tx_time_single += t_slot + min(cw, mp->cw_max);
+ cw = (cw + 1) << 1;
+
+ tx_time += tx_time_single;
+ tx_time_cts += tx_time_single + mi->sp_ack_dur;
+ tx_time_rtscts += tx_time_single + 2 * mi->sp_ack_dur;
+ if ((tx_time_cts < mp->segment_size) &&
+ (mr->retry_count_cts < mp->max_retry))
+ mr->retry_count_cts++;
+ if ((tx_time_rtscts < mp->segment_size) &&
+ (mr->retry_count_rtscts < mp->max_retry))
+ mr->retry_count_rtscts++;
+ } while ((tx_time < mp->segment_size) &&
+ (++mr->retry_count < mp->max_retry));
+ mr->adjusted_retry_count = mr->retry_count;
+ }
+
+ for (i = n; i < sband->n_bitrates; i++) {
+ struct minstrel_rate *mr = &mi->r[i];
+ mr->rix = -1;
+ }
+
+ mi->n_rates = n;
+ mi->stats_update = jiffies;
+
+ init_sample_table(mi);
+}
+
+static void *
+minstrel_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
+{
+ struct ieee80211_supported_band *sband;
+ struct minstrel_sta_info *mi;
+ struct minstrel_priv *mp = priv;
+ struct ieee80211_hw *hw = mp->hw;
+ int max_rates = 0;
+ int i;
+
+ mi = kzalloc(sizeof(struct minstrel_sta_info), gfp);
+ if (!mi)
+ return NULL;
+
+ for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+ sband = hw->wiphy->bands[hw->conf.channel->band];
+ if (sband->n_bitrates > max_rates)
+ max_rates = sband->n_bitrates;
+ }
+
+ mi->r = kzalloc(sizeof(struct minstrel_rate) * max_rates, gfp);
+ if (!mi->r)
+ goto error;
+
+ mi->sample_table = kmalloc(SAMPLE_COLUMNS * max_rates, gfp);
+ if (!mi->sample_table)
+ goto error1;
+
+ mi->stats_update = jiffies;
+ return mi;
+
+error1:
+ kfree(mi->r);
+error:
+ kfree(mi);
+ return NULL;
+}
+
+static void
+minstrel_free_sta(void *priv, struct ieee80211_sta *sta, void *priv_sta)
+{
+ struct minstrel_sta_info *mi = priv_sta;
+
+ kfree(mi->sample_table);
+ kfree(mi->r);
+ kfree(mi);
+}
+
+static void
+minstrel_clear(void *priv)
+{
+}
+
+static void *
+minstrel_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
+{
+ struct minstrel_priv *mp;
+
+ mp = kzalloc(sizeof(struct minstrel_priv), GFP_ATOMIC);
+ if (!mp)
+ return NULL;
+
+ /* contention window settings
+ * Just an approximation. Using the per-queue values would complicate
+ * the calculations and is probably unnecessary */
+ mp->cw_min = 15;
+ mp->cw_max = 1023;
+
+ /* number of packets (in %) to use for sampling other rates
+ * sample less often for non-mrr packets, because the overhead
+ * is much higher than with mrr */
+ mp->lookaround_rate = 5;
+ mp->lookaround_rate_mrr = 10;
+
+ /* moving average weight for EWMA */
+ mp->ewma_level = 75;
+
+ /* maximum time that the hw is allowed to stay in one MRR segment */
+ mp->segment_size = 6000;
+
+ if (hw->max_altrate_tries > 0)
+ mp->max_retry = hw->max_altrate_tries;
+ else
+ /* safe default, does not necessarily have to match hw properties */
+ mp->max_retry = 7;
+
+ if (hw->max_altrates >= 3)
+ mp->has_mrr = true;
+
+ mp->hw = hw;
+ mp->update_interval = 100;
+
+ return mp;
+}
+
+static void
+minstrel_free(void *priv)
+{
+ kfree(priv);
+}
+
+static struct rate_control_ops mac80211_minstrel = {
+ .name = "minstrel",
+ .tx_status = minstrel_tx_status,
+ .get_rate = minstrel_get_rate,
+ .rate_init = minstrel_rate_init,
+ .clear = minstrel_clear,
+ .alloc = minstrel_alloc,
+ .free = minstrel_free,
+ .alloc_sta = minstrel_alloc_sta,
+ .free_sta = minstrel_free_sta,
+#ifdef CONFIG_MAC80211_DEBUGFS
+ .add_sta_debugfs = minstrel_add_sta_debugfs,
+ .remove_sta_debugfs = minstrel_remove_sta_debugfs,
+#endif
+};
+
+int __init
+rc80211_minstrel_init(void)
+{
+ return ieee80211_rate_control_register(&mac80211_minstrel);
+}
+
+void
+rc80211_minstrel_exit(void)
+{
+ ieee80211_rate_control_unregister(&mac80211_minstrel);
+}
+
--- a/net/mac80211/Makefile
+++ b/net/mac80211/Makefile
@@ -41,4 +41,8 @@
rc80211_pid-y := rc80211_pid_algo.o
rc80211_pid-$(CONFIG_MAC80211_DEBUGFS) += rc80211_pid_debugfs.o
+rc80211_minstrel-y := rc80211_minstrel.o
+rc80211_minstrel-$(CONFIG_MAC80211_DEBUGFS) += rc80211_minstrel_debugfs.o
+
mac80211-$(CONFIG_MAC80211_RC_PID) += $(rc80211_pid-y)
+mac80211-$(CONFIG_MAC80211_RC_MINSTREL) += $(rc80211_minstrel-y)
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -1015,6 +1015,10 @@
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
+ ret = rc80211_minstrel_init();
+ if (ret)
+ return ret;
+
ret = rc80211_pid_init();
if (ret)
return ret;
@@ -1027,6 +1031,7 @@
static void __exit ieee80211_exit(void)
{
rc80211_pid_exit();
+ rc80211_minstrel_exit();
/*
* For key todo, it'll be empty by now but the work
--- a/net/mac80211/rate.h
+++ b/net/mac80211/rate.h
@@ -125,4 +125,18 @@
}
#endif
+#ifdef CONFIG_MAC80211_RC_MINSTREL
+extern int rc80211_minstrel_init(void);
+extern void rc80211_minstrel_exit(void);
+#else
+static inline int rc80211_minstrel_init(void)
+{
+ return 0;
+}
+static inline void rc80211_minstrel_exit(void)
+{
+}
+#endif
+
+
#endif /* IEEE80211_RATE_H */
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __RC_MINSTREL_H
+#define __RC_MINSTREL_H
+
+struct minstrel_rate {
+ int bitrate;
+ int rix;
+
+ unsigned int perfect_tx_time;
+ unsigned int ack_time;
+
+ unsigned int retry_count;
+ unsigned int retry_count_cts;
+ unsigned int retry_count_rtscts;
+ unsigned int adjusted_retry_count;
+
+ u32 success;
+ u32 attempts;
+ u32 last_attempts;
+ u32 last_success;
+
+ /* parts per thousand */
+ u32 cur_prob;
+ u32 probability;
+
+ /* per-rate throughput */
+ u32 cur_tp;
+ u32 throughput;
+
+ u64 succ_hist;
+ u64 att_hist;
+};
+
+struct minstrel_sta_info {
+ unsigned long stats_update;
+ unsigned int sp_ack_dur;
+ unsigned int rate_avg;
+
+ unsigned int lowest_rix;
+
+ unsigned int max_tp_rate;
+ unsigned int max_tp_rate2;
+ unsigned int max_prob_rate;
+ unsigned int packet_count;
+ unsigned int sample_count;
+ int sample_deferred;
+
+ unsigned int sample_idx;
+ unsigned int sample_column;
+
+ int n_rates;
+ struct minstrel_rate *r;
+
+ /* sampling table */
+ u8 *sample_table;
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+ struct dentry *dbg_stats;
+#endif
+};
+
+struct minstrel_priv {
+ struct ieee80211_hw *hw;
+ bool has_mrr;
+ unsigned int cw_min;
+ unsigned int cw_max;
+ unsigned int max_retry;
+ unsigned int ewma_level;
+ unsigned int segment_size;
+ unsigned int update_interval;
+ unsigned int lookaround_rate;
+ unsigned int lookaround_rate_mrr;
+};
+
+void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
+void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
+
+#endif
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel_debugfs.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on minstrel.c:
+ * Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
+ * Sponsored by Indranet Technologies Ltd
+ *
+ * Based on sample.c:
+ * Copyright (c) 2005 John Bicket
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ * redistribution must be conditioned upon including a substantially
+ * similar Disclaimer requirement for further binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ */
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/debugfs.h>
+#include <linux/ieee80211.h>
+#include <net/mac80211.h>
+#include "rc80211_minstrel.h"
+
+struct minstrel_stats_info {
+ struct minstrel_sta_info *mi;
+ char buf[4096];
+ size_t len;
+};
+
+static int
+minstrel_stats_open(struct inode *inode, struct file *file)
+{
+ struct minstrel_sta_info *mi = inode->i_private;
+ struct minstrel_stats_info *ms;
+ unsigned int i, tp, prob, eprob;
+ char *p;
+
+ ms = kmalloc(sizeof(*ms), GFP_KERNEL);
+ if (!ms)
+ return -ENOMEM;
+
+ file->private_data = ms;
+ p = ms->buf;
+ p += sprintf(p, "rate throughput ewma prob this prob "
+ "this succ/attempt success attempts\n");
+ for (i = 0; i < mi->n_rates; i++) {
+ struct minstrel_rate *mr = &mi->r[i];
+
+ *(p++) = (i == mi->max_tp_rate) ? 'T' : ' ';
+ *(p++) = (i == mi->max_tp_rate2) ? 't' : ' ';
+ *(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
+ p += sprintf(p, "%3u%s", mr->bitrate / 2,
+ (mr->bitrate & 1 ? ".5" : " "));
+
+ tp = ((mr->cur_tp * 96) / 18000) >> 10;
+ prob = mr->cur_prob / 18;
+ eprob = mr->probability / 18;
+
+ p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u "
+ "%3u(%3u) %8llu %8llu\n",
+ tp / 10, tp % 10,
+ eprob / 10, eprob % 10,
+ prob / 10, prob % 10,
+ mr->last_success,
+ mr->last_attempts,
+ mr->succ_hist,
+ mr->att_hist);
+ }
+ p += sprintf(p, "\nTotal packet count:: ideal %d "
+ "lookaround %d\n\n",
+ mi->packet_count - mi->sample_count,
+ mi->sample_count);
+ ms->len = p - ms->buf;
+
+ return 0;
+}
+
+static int
+minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *o)
+{
+ struct minstrel_stats_info *ms;
+ char *src;
+
+ ms = file->private_data;
+ src = ms->buf;
+
+ len = min(len, ms->len);
+ if (len <= *o)
+ return 0;
+
+ src += *o;
+ len -= *o;
+ *o += len;
+
+ if (copy_to_user(buf, src, len))
+ return -EFAULT;
+
+ return len;
+}
+
+static int
+minstrel_stats_release(struct inode *inode, struct file *file)
+{
+ struct minstrel_stats_info *ms = file->private_data;
+
+ kfree(ms);
+
+ return 0;
+}
+
+static struct file_operations minstrel_stat_fops = {
+ .owner = THIS_MODULE,
+ .open = minstrel_stats_open,
+ .read = minstrel_stats_read,
+ .release = minstrel_stats_release,
+};
+
+void
+minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
+{
+ struct minstrel_sta_info *mi = priv_sta;
+
+ mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
+ &minstrel_stat_fops);
+}
+
+void
+minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
+{
+ struct minstrel_sta_info *mi = priv_sta;
+
+ debugfs_remove(mi->dbg_stats);
+}
--- a/net/mac80211/Kconfig
+++ b/net/mac80211/Kconfig
@@ -22,6 +22,11 @@
mac80211 that uses a PID controller to select the TX
rate.
+config MAC80211_RC_MINSTREL
+ bool "Minstrel"
+ ---help---
+ This option enables the 'minstrel' TX rate control algorithm
+
choice
prompt "Default rate control algorithm"
default MAC80211_RC_DEFAULT_PID
@@ -39,11 +44,19 @@
default rate control algorithm. You should choose
this unless you know what you are doing.
+config MAC80211_RC_DEFAULT_MINSTREL
+ bool "Minstrel"
+ depends on MAC80211_RC_MINSTREL
+ ---help---
+ Select Minstrel as the default rate control algorithm.
+
+
endchoice
config MAC80211_RC_DEFAULT
string
default "pid" if MAC80211_RC_DEFAULT_PID
+ default "minstrel" if MAC80211_RC_DEFAULT_MINSTREL
default ""
endmenu