mac80211: add the new 802.11n minstrel rate control implementation (optional, not used by default)

SVN-Revision: 19943

package/mac80211/Config.in.ath9k

@@ -10,3 +10,7 @@ config PACKAGE_ATH9K_DEBUG
 	  modprobe ath9k debug=0x00002000
 
 	  Look in ath9k/core.h for possible debug masks
+
+config PACKAGE_ATH9K_USE_MINSTREL
+	bool "use the new minstrel_ht rate control for ath9k"
+	depends PACKAGE_kmod-ath9k

package/mac80211/Makefile

@@ -23,6 +23,7 @@ PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/compat-wireless-$(PKG_VERSION)
 PKG_CONFIG_DEPENDS:= \
 	CONFIG_PACKAGE_kmod-mac80211 \
 	CONFIG_PACKAGE_MAC80211_DEBUGFS \
+	CONFIG_PACKAGE_ATH9K_USE_MINSTREL \
 	CONFIG_PACKAGE_ATH_DEBUG \
 	CONFIG_ATH_USER_REGD \
 
@@ -519,7 +520,8 @@ BUILDFLAGS:= \
 	$(if $(CONFIG_PACKAGE_MAC80211_DEBUGFS),-DCONFIG_MAC80211_DEBUGFS -DCONFIG_ATH9K_DEBUGFS) \
 	$(if $(CONFIG_PACKAGE_ATH_DEBUG),-DCONFIG_ATH_DEBUG) \
 	-D__CONFIG_MAC80211_RC_DEFAULT=minstrel \
-	$(if $(CONFIG_ATH_USER_REGD),-DATH_USER_REGD=1)
+	$(if $(CONFIG_ATH_USER_REGD),-DATH_USER_REGD=1) \
+	$(if $(CONFIG_PACKAGE_ATH9K_USE_MINSTREL),-DATH9K_USE_MINSTREL)
 
 MAKE_OPTS:= \
 	CROSS_COMPILE="$(KERNEL_CROSS)" \

package/mac80211/patches/560-ath9k_fix_ampdu_rate_handling.patch

@@ -0,0 +1,42 @@
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -1947,10 +1947,10 @@ static void ath_tx_rc_status(struct ath_
+ 	tx_rateindex = ds->ds_txstat.ts_rateindex;
+ 	WARN_ON(tx_rateindex >= hw->max_rates);
+ 
+-	if (update_rc)
+-		tx_info->pad[0] |= ATH_TX_INFO_UPDATE_RC;
+ 	if (ds->ds_txstat.ts_status & ATH9K_TXERR_FILT)
+ 		tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
++	if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && update_rc)
++		tx_info->flags |= IEEE80211_TX_STAT_AMPDU;
+ 
+ 	if ((ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) == 0 &&
+ 	    (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) {
+--- a/drivers/net/wireless/ath/ath9k/rc.h
++++ b/drivers/net/wireless/ath/ath9k/rc.h
+@@ -172,7 +172,6 @@ struct ath_rate_priv {
+ 
+ #define ATH_TX_INFO_FRAME_TYPE_INTERNAL	(1 << 0)
+ #define ATH_TX_INFO_FRAME_TYPE_PAUSE	(1 << 1)
+-#define ATH_TX_INFO_UPDATE_RC		(1 << 2)
+ #define ATH_TX_INFO_XRETRY		(1 << 3)
+ #define ATH_TX_INFO_UNDERRUN		(1 << 4)
+ 
+--- a/drivers/net/wireless/ath/ath9k/rc.c
++++ b/drivers/net/wireless/ath/ath9k/rc.c
+@@ -1226,8 +1226,12 @@ static void ath_tx_status(void *priv, st
+ 		long_retry = rate->count - 1;
+ 	}
+ 
+-	if (!priv_sta || !ieee80211_is_data(fc) ||
+-	    !(tx_info->pad[0] & ATH_TX_INFO_UPDATE_RC))
++	if (!priv_sta || !ieee80211_is_data(fc))
++		return;
++
++	/* This packet was aggregated but doesn't carry status info */
++	if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) &&
++	    !(tx_info->flags & IEEE80211_TX_STAT_AMPDU))
+ 		return;
+ 
+ 	if (tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED)

package/mac80211/patches/570-minstrel_debugfs_cleanup.patch

@@ -0,0 +1,80 @@
+--- a/net/mac80211/rc80211_minstrel.h
++++ b/net/mac80211/rc80211_minstrel.h
+@@ -80,6 +80,11 @@ struct minstrel_priv {
+ 	unsigned int lookaround_rate_mrr;
+ };
+ 
++struct minstrel_debugfs_info {
++	size_t len;
++	char buf[];
++};
++
+ void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
+ void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
+ 
+--- a/net/mac80211/rc80211_minstrel_debugfs.c
++++ b/net/mac80211/rc80211_minstrel_debugfs.c
+@@ -52,21 +52,15 @@
+ #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;
++	struct minstrel_debugfs_info *ms;
+ 	unsigned int i, tp, prob, eprob;
+ 	char *p;
+ 
+-	ms = kmalloc(sizeof(*ms), GFP_KERNEL);
++	ms = kmalloc(sizeof(*ms) + 4096, GFP_KERNEL);
+ 	if (!ms)
+ 		return -ENOMEM;
+ 
+@@ -107,35 +101,18 @@ minstrel_stats_open(struct inode *inode,
+ }
+ 
+ static ssize_t
+-minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *o)
++minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
+ {
+-	struct minstrel_stats_info *ms;
+-	char *src;
++	struct minstrel_debugfs_info *ms;
+ 
+ 	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;
++	return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
+ }
+ 
+ static int
+ minstrel_stats_release(struct inode *inode, struct file *file)
+ {
+-	struct minstrel_stats_info *ms = file->private_data;
+-
+-	kfree(ms);
+-
++	kfree(file->private_data);
+ 	return 0;
+ }
+ 

package/mac80211/patches/580-minstrel_extern.patch

@@ -0,0 +1,56 @@
+--- a/net/mac80211/rc80211_minstrel.h
++++ b/net/mac80211/rc80211_minstrel.h
+@@ -85,7 +85,13 @@ struct minstrel_debugfs_info {
+ 	char buf[];
+ };
+ 
++extern struct rate_control_ops mac80211_minstrel;
+ void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
+ void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
+ 
++/* debugfs */
++int minstrel_stats_open(struct inode *inode, struct file *file);
++ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *o);
++int minstrel_stats_release(struct inode *inode, struct file *file);
++
+ #endif
+--- a/net/mac80211/rc80211_minstrel.c
++++ b/net/mac80211/rc80211_minstrel.c
+@@ -541,7 +541,7 @@ minstrel_free(void *priv)
+ 	kfree(priv);
+ }
+ 
+-static struct rate_control_ops mac80211_minstrel = {
++struct rate_control_ops mac80211_minstrel = {
+ 	.name = "minstrel",
+ 	.tx_status = minstrel_tx_status,
+ 	.get_rate = minstrel_get_rate,
+--- a/net/mac80211/rc80211_minstrel_debugfs.c
++++ b/net/mac80211/rc80211_minstrel_debugfs.c
+@@ -52,7 +52,7 @@
+ #include <net/mac80211.h>
+ #include "rc80211_minstrel.h"
+ 
+-static int
++int
+ minstrel_stats_open(struct inode *inode, struct file *file)
+ {
+ 	struct minstrel_sta_info *mi = inode->i_private;
+@@ -100,7 +100,7 @@ minstrel_stats_open(struct inode *inode,
+ 	return 0;
+ }
+ 
+-static ssize_t
++ssize_t
+ minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
+ {
+ 	struct minstrel_debugfs_info *ms;
+@@ -109,7 +109,7 @@ minstrel_stats_read(struct file *file, c
+ 	return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
+ }
+ 
+-static int
++int
+ minstrel_stats_release(struct inode *inode, struct file *file)
+ {
+ 	kfree(file->private_data);

package/mac80211/patches/600-ath9k_use_minstrel.patch

@@ -0,0 +1,14 @@
+--- a/drivers/net/wireless/ath/ath9k/init.c
++++ b/drivers/net/wireless/ath/ath9k/init.c
+@@ -655,7 +655,11 @@ void ath9k_set_hw_capab(struct ath_softc
+ 	hw->sta_data_size = sizeof(struct ath_node);
+ 	hw->vif_data_size = sizeof(struct ath_vif);
+ 
++#ifdef ATH9K_USE_MINSTREL
++	hw->rate_control_algorithm = "minstrel_ht";
++#else
+ 	hw->rate_control_algorithm = "ath9k_rate_control";
++#endif
+ 
+ 	if (test_bit(ATH9K_MODE_11G, sc->sc_ah->caps.wireless_modes))
+ 		hw->wiphy->bands[IEEE80211_BAND_2GHZ] =