--- /dev/null
+From: Chaitanya T K <chaitanya.mgit@gmail.com>
+Date: Mon, 27 Jun 2016 15:23:26 +0530
+Subject: [PATCH] mac80211: minstrel: Enable STBC and LDPC for VHT Rates
+
+If peer support reception of STBC and LDPC, enable them for better
+performance.
+
+Signed-off-by: Chaitanya TK <chaitanya.mgit@gmail.com>
+---
+
+--- a/include/linux/ieee80211.h
++++ b/include/linux/ieee80211.h
+@@ -1659,6 +1659,7 @@ struct ieee80211_mu_edca_param_set {
+ #define IEEE80211_VHT_CAP_RXSTBC_3 0x00000300
+ #define IEEE80211_VHT_CAP_RXSTBC_4 0x00000400
+ #define IEEE80211_VHT_CAP_RXSTBC_MASK 0x00000700
++#define IEEE80211_VHT_CAP_RXSTBC_SHIFT 8
+ #define IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE 0x00000800
+ #define IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE 0x00001000
+ #define IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT 13
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -1130,7 +1130,7 @@ minstrel_ht_update_caps(void *priv, stru
+ struct minstrel_ht_sta_priv *msp = priv_sta;
+ struct minstrel_ht_sta *mi = &msp->ht;
+ struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
+- u16 sta_cap = sta->ht_cap.cap;
++ u16 ht_cap = sta->ht_cap.cap;
+ struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
+ struct sta_info *sinfo = container_of(sta, struct sta_info, sta);
+ int use_vht;
+@@ -1138,6 +1138,7 @@ minstrel_ht_update_caps(void *priv, stru
+ int ack_dur;
+ int stbc;
+ int i;
++ bool ldpc = false;
+
+ /* fall back to the old minstrel for legacy stations */
+ if (!sta->ht_cap.ht_supported)
+@@ -1175,16 +1176,24 @@ minstrel_ht_update_caps(void *priv, stru
+ }
+ mi->sample_tries = 4;
+
+- /* TODO tx_flags for vht - ATM the RC API is not fine-grained enough */
+ if (!use_vht) {
+- stbc = (sta_cap & IEEE80211_HT_CAP_RX_STBC) >>
++ stbc = (ht_cap & IEEE80211_HT_CAP_RX_STBC) >>
+ IEEE80211_HT_CAP_RX_STBC_SHIFT;
+- mi->tx_flags |= stbc << IEEE80211_TX_CTL_STBC_SHIFT;
+
+- if (sta_cap & IEEE80211_HT_CAP_LDPC_CODING)
+- mi->tx_flags |= IEEE80211_TX_CTL_LDPC;
++ if (ht_cap & IEEE80211_HT_CAP_LDPC_CODING)
++ ldpc = true;
++ } else {
++ stbc = (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK) >>
++ IEEE80211_VHT_CAP_RXSTBC_SHIFT;
++
++ if (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)
++ ldpc = true;
+ }
+
++ mi->tx_flags |= stbc << IEEE80211_TX_CTL_STBC_SHIFT;
++ if (ldpc)
++ mi->tx_flags |= IEEE80211_TX_CTL_LDPC;
++
+ for (i = 0; i < ARRAY_SIZE(mi->groups); i++) {
+ u32 gflags = minstrel_mcs_groups[i].flags;
+ int bw, nss;
+@@ -1197,10 +1206,10 @@ minstrel_ht_update_caps(void *priv, stru
+
+ if (gflags & IEEE80211_TX_RC_SHORT_GI) {
+ if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
+- if (!(sta_cap & IEEE80211_HT_CAP_SGI_40))
++ if (!(ht_cap & IEEE80211_HT_CAP_SGI_40))
+ continue;
+ } else {
+- if (!(sta_cap & IEEE80211_HT_CAP_SGI_20))
++ if (!(ht_cap & IEEE80211_HT_CAP_SGI_20))
+ continue;
+ }
+ }
--- /dev/null
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sat, 10 Feb 2018 12:41:51 +0100
+Subject: [PATCH] mac80211: minstrel: remove unnecessary debugfs cleanup
+ code
+
+debugfs entries are cleaned up by debugfs_remove_recursive already.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/rc80211_minstrel.c
++++ b/net/mac80211/rc80211_minstrel.c
+@@ -689,8 +689,8 @@ minstrel_alloc(struct ieee80211_hw *hw,
+
+ #ifdef CPTCFG_MAC80211_DEBUGFS
+ mp->fixed_rate_idx = (u32) -1;
+- mp->dbg_fixed_rate = debugfs_create_u32("fixed_rate_idx",
+- 0666, debugfsdir, &mp->fixed_rate_idx);
++ debugfs_create_u32("fixed_rate_idx", S_IRUGO | S_IWUGO, debugfsdir,
++ &mp->fixed_rate_idx);
+ #endif
+
+ minstrel_init_cck_rates(mp);
+@@ -701,9 +701,6 @@ minstrel_alloc(struct ieee80211_hw *hw,
+ static void
+ minstrel_free(void *priv)
+ {
+-#ifdef CPTCFG_MAC80211_DEBUGFS
+- debugfs_remove(((struct minstrel_priv *)priv)->dbg_fixed_rate);
+-#endif
+ kfree(priv);
+ }
+
+@@ -735,7 +732,6 @@ const struct rate_control_ops mac80211_m
+ .free_sta = minstrel_free_sta,
+ #ifdef CPTCFG_MAC80211_DEBUGFS
+ .add_sta_debugfs = minstrel_add_sta_debugfs,
+- .remove_sta_debugfs = minstrel_remove_sta_debugfs,
+ #endif
+ .get_expected_throughput = minstrel_get_expected_throughput,
+ };
+--- a/net/mac80211/rc80211_minstrel.h
++++ b/net/mac80211/rc80211_minstrel.h
+@@ -109,11 +109,6 @@ struct minstrel_sta_info {
+
+ /* sampling table */
+ u8 *sample_table;
+-
+-#ifdef CPTCFG_MAC80211_DEBUGFS
+- struct dentry *dbg_stats;
+- struct dentry *dbg_stats_csv;
+-#endif
+ };
+
+ struct minstrel_priv {
+@@ -137,7 +132,6 @@ struct minstrel_priv {
+ * - setting will be applied on next update
+ */
+ u32 fixed_rate_idx;
+- struct dentry *dbg_fixed_rate;
+ #endif
+ };
+
+@@ -156,7 +150,6 @@ minstrel_get_ewmsd10(struct minstrel_rat
+
+ extern const 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);
+
+ /* Recalculate success probabilities and counters for a given rate using EWMA */
+ void minstrel_calc_rate_stats(struct minstrel_rate_stats *mrs);
+--- a/net/mac80211/rc80211_minstrel_debugfs.c
++++ b/net/mac80211/rc80211_minstrel_debugfs.c
+@@ -214,19 +214,7 @@ minstrel_add_sta_debugfs(void *priv, voi
+ {
+ struct minstrel_sta_info *mi = priv_sta;
+
+- mi->dbg_stats = debugfs_create_file("rc_stats", 0444, dir, mi,
+- &minstrel_stat_fops);
+-
+- mi->dbg_stats_csv = debugfs_create_file("rc_stats_csv", 0444, dir, mi,
+- &minstrel_stat_csv_fops);
+-}
+-
+-void
+-minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
+-{
+- struct minstrel_sta_info *mi = priv_sta;
+-
+- debugfs_remove(mi->dbg_stats);
+-
+- debugfs_remove(mi->dbg_stats_csv);
++ debugfs_create_file("rc_stats", S_IRUGO, dir, mi, &minstrel_stat_fops);
++ debugfs_create_file("rc_stats_csv", S_IRUGO, dir, mi,
++ &minstrel_stat_csv_fops);
+ }
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -1393,7 +1393,6 @@ static const struct rate_control_ops mac
+ .free = minstrel_ht_free,
+ #ifdef CPTCFG_MAC80211_DEBUGFS
+ .add_sta_debugfs = minstrel_ht_add_sta_debugfs,
+- .remove_sta_debugfs = minstrel_ht_remove_sta_debugfs,
+ #endif
+ .get_expected_throughput = minstrel_ht_get_expected_throughput,
+ };
+--- a/net/mac80211/rc80211_minstrel_ht.h
++++ b/net/mac80211/rc80211_minstrel_ht.h
+@@ -110,17 +110,12 @@ struct minstrel_ht_sta_priv {
+ struct minstrel_ht_sta ht;
+ struct minstrel_sta_info legacy;
+ };
+-#ifdef CPTCFG_MAC80211_DEBUGFS
+- struct dentry *dbg_stats;
+- struct dentry *dbg_stats_csv;
+-#endif
+ void *ratelist;
+ void *sample_table;
+ bool is_ht;
+ };
+
+ void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
+-void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);
+ int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
+ int prob_ewma);
+
+--- a/net/mac80211/rc80211_minstrel_ht_debugfs.c
++++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
+@@ -303,17 +303,8 @@ minstrel_ht_add_sta_debugfs(void *priv,
+ {
+ struct minstrel_ht_sta_priv *msp = priv_sta;
+
+- msp->dbg_stats = debugfs_create_file("rc_stats", 0444, dir, msp,
+- &minstrel_ht_stat_fops);
+- msp->dbg_stats_csv = debugfs_create_file("rc_stats_csv", 0444, dir, msp,
+- &minstrel_ht_stat_csv_fops);
+-}
+-
+-void
+-minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
+-{
+- struct minstrel_ht_sta_priv *msp = priv_sta;
+-
+- debugfs_remove(msp->dbg_stats);
+- debugfs_remove(msp->dbg_stats_csv);
++ debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
++ &minstrel_ht_stat_fops);
++ debugfs_create_file("rc_stats_csv", S_IRUGO, dir, msp,
++ &minstrel_ht_stat_csv_fops);
+ }
--- /dev/null
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sat, 10 Feb 2018 12:43:30 +0100
+Subject: [PATCH] mac80211: minstrel: merge with minstrel_ht, always enable
+ VHT support
+
+Legacy-only devices are not very common and the overhead of the extra
+code for HT and VHT rates is not big enough to justify all those extra
+lines of code to make it optional.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/Kconfig
++++ b/net/mac80211/Kconfig
+@@ -25,20 +25,6 @@ config MAC80211_RC_MINSTREL
+ ---help---
+ This option enables the 'minstrel' TX rate control algorithm
+
+-config MAC80211_RC_MINSTREL_HT
+- bool "Minstrel 802.11n support" if EXPERT
+- depends on MAC80211_RC_MINSTREL
+- default y
+- ---help---
+- This option enables the 'minstrel_ht' TX rate control algorithm
+-
+-config MAC80211_RC_MINSTREL_VHT
+- bool "Minstrel 802.11ac support" if EXPERT
+- depends on MAC80211_RC_MINSTREL_HT
+- default n
+- ---help---
+- This option enables VHT in the 'minstrel_ht' TX rate control algorithm
+-
+ choice
+ prompt "Default rate control algorithm"
+ depends on MAC80211_HAS_RC
+@@ -60,8 +46,7 @@ endchoice
+
+ config MAC80211_RC_DEFAULT
+ string
+- default "minstrel_ht" if MAC80211_RC_DEFAULT_MINSTREL && MAC80211_RC_MINSTREL_HT
+- default "minstrel" if MAC80211_RC_DEFAULT_MINSTREL
++ default "minstrel_ht" if MAC80211_RC_DEFAULT_MINSTREL
+ default ""
+
+ endif
+--- a/net/mac80211/Makefile
++++ b/net/mac80211/Makefile
+@@ -52,13 +52,14 @@ mac80211-$(CONFIG_PM) += pm.o
+
+ CFLAGS_trace.o := -I$(src)
+
+-rc80211_minstrel-y := rc80211_minstrel.o
+-rc80211_minstrel-$(CPTCFG_MAC80211_DEBUGFS) += rc80211_minstrel_debugfs.o
++rc80211_minstrel-y := \
++ rc80211_minstrel.o \
++ rc80211_minstrel_ht.o
+
+-rc80211_minstrel_ht-y := rc80211_minstrel_ht.o
+-rc80211_minstrel_ht-$(CPTCFG_MAC80211_DEBUGFS) += rc80211_minstrel_ht_debugfs.o
++rc80211_minstrel-$(CPTCFG_MAC80211_DEBUGFS) += \
++ rc80211_minstrel_debugfs.o \
++ rc80211_minstrel_ht_debugfs.o
+
+ mac80211-$(CPTCFG_MAC80211_RC_MINSTREL) += $(rc80211_minstrel-y)
+-mac80211-$(CPTCFG_MAC80211_RC_MINSTREL_HT) += $(rc80211_minstrel_ht-y)
+
+ ccflags-y += -DDEBUG
+--- a/net/mac80211/main.c
++++ b/net/mac80211/main.c
+@@ -1308,18 +1308,12 @@ static int __init ieee80211_init(void)
+ if (ret)
+ return ret;
+
+- ret = rc80211_minstrel_ht_init();
+- if (ret)
+- goto err_minstrel;
+-
+ ret = ieee80211_iface_init();
+ if (ret)
+ goto err_netdev;
+
+ return 0;
+ err_netdev:
+- rc80211_minstrel_ht_exit();
+- err_minstrel:
+ rc80211_minstrel_exit();
+
+ return ret;
+@@ -1327,7 +1321,6 @@ static int __init ieee80211_init(void)
+
+ static void __exit ieee80211_exit(void)
+ {
+- rc80211_minstrel_ht_exit();
+ rc80211_minstrel_exit();
+
+ ieee80211s_stop();
+--- a/net/mac80211/rate.h
++++ b/net/mac80211/rate.h
+@@ -95,18 +95,5 @@ static inline void rc80211_minstrel_exit
+ }
+ #endif
+
+-#ifdef CPTCFG_MAC80211_RC_MINSTREL_HT
+-int rc80211_minstrel_ht_init(void);
+-void rc80211_minstrel_ht_exit(void);
+-#else
+-static inline int rc80211_minstrel_ht_init(void)
+-{
+- return 0;
+-}
+-static inline void rc80211_minstrel_ht_exit(void)
+-{
+-}
+-#endif
+-
+
+ #endif /* IEEE80211_RATE_H */
+--- a/net/mac80211/rc80211_minstrel.c
++++ b/net/mac80211/rc80211_minstrel.c
+@@ -572,138 +572,6 @@ minstrel_rate_init(void *priv, struct ie
+ minstrel_update_rates(mp, 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 < NUM_NL80211_BANDS; i++) {
+- sband = hw->wiphy->bands[i];
+- if (sband && sband->n_bitrates > max_rates)
+- max_rates = sband->n_bitrates;
+- }
+-
+- mi->r = kcalloc(max_rates, sizeof(struct minstrel_rate), gfp);
+- if (!mi->r)
+- goto error;
+-
+- mi->sample_table = kmalloc_array(max_rates, SAMPLE_COLUMNS, gfp);
+- if (!mi->sample_table)
+- goto error1;
+-
+- mi->last_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_init_cck_rates(struct minstrel_priv *mp)
+-{
+- static const int bitrates[4] = { 10, 20, 55, 110 };
+- struct ieee80211_supported_band *sband;
+- u32 rate_flags = ieee80211_chandef_rate_flags(&mp->hw->conf.chandef);
+- int i, j;
+-
+- sband = mp->hw->wiphy->bands[NL80211_BAND_2GHZ];
+- if (!sband)
+- return;
+-
+- for (i = 0, j = 0; i < sband->n_bitrates; i++) {
+- struct ieee80211_rate *rate = &sband->bitrates[i];
+-
+- if (rate->flags & IEEE80211_RATE_ERP_G)
+- continue;
+-
+- if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
+- continue;
+-
+- for (j = 0; j < ARRAY_SIZE(bitrates); j++) {
+- if (rate->bitrate != bitrates[j])
+- continue;
+-
+- mp->cck_rates[j] = i;
+- break;
+- }
+- }
+-}
+-
+-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;
+-
+- /* maximum time that the hw is allowed to stay in one MRR segment */
+- mp->segment_size = 6000;
+-
+- if (hw->max_rate_tries > 0)
+- mp->max_retry = hw->max_rate_tries;
+- else
+- /* safe default, does not necessarily have to match hw properties */
+- mp->max_retry = 7;
+-
+- if (hw->max_rates >= 4)
+- mp->has_mrr = true;
+-
+- mp->hw = hw;
+- mp->update_interval = 100;
+-
+-#ifdef CPTCFG_MAC80211_DEBUGFS
+- mp->fixed_rate_idx = (u32) -1;
+- debugfs_create_u32("fixed_rate_idx", S_IRUGO | S_IWUGO, debugfsdir,
+- &mp->fixed_rate_idx);
+-#endif
+-
+- minstrel_init_cck_rates(mp);
+-
+- return mp;
+-}
+-
+-static void
+-minstrel_free(void *priv)
+-{
+- kfree(priv);
+-}
+-
+ static u32 minstrel_get_expected_throughput(void *priv_sta)
+ {
+ struct minstrel_sta_info *mi = priv_sta;
+@@ -722,28 +590,8 @@ static u32 minstrel_get_expected_through
+ }
+
+ const struct rate_control_ops mac80211_minstrel = {
+- .name = "minstrel",
+ .tx_status_ext = minstrel_tx_status,
+ .get_rate = minstrel_get_rate,
+ .rate_init = minstrel_rate_init,
+- .alloc = minstrel_alloc,
+- .free = minstrel_free,
+- .alloc_sta = minstrel_alloc_sta,
+- .free_sta = minstrel_free_sta,
+-#ifdef CPTCFG_MAC80211_DEBUGFS
+- .add_sta_debugfs = minstrel_add_sta_debugfs,
+-#endif
+ .get_expected_throughput = minstrel_get_expected_throughput,
+ };
+-
+-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/rc80211_minstrel.h
++++ b/net/mac80211/rc80211_minstrel.h
+@@ -158,7 +158,5 @@ int minstrel_get_tp_avg(struct minstrel_
+ /* debugfs */
+ int minstrel_stats_open(struct inode *inode, struct file *file);
+ int minstrel_stats_csv_open(struct inode *inode, struct file *file);
+-ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos);
+-int minstrel_stats_release(struct inode *inode, struct file *file);
+
+ #endif
+--- a/net/mac80211/rc80211_minstrel_debugfs.c
++++ b/net/mac80211/rc80211_minstrel_debugfs.c
+@@ -54,22 +54,6 @@
+ #include <net/mac80211.h>
+ #include "rc80211_minstrel.h"
+
+-ssize_t
+-minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
+-{
+- struct minstrel_debugfs_info *ms;
+-
+- ms = file->private_data;
+- return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
+-}
+-
+-int
+-minstrel_stats_release(struct inode *inode, struct file *file)
+-{
+- kfree(file->private_data);
+- return 0;
+-}
+-
+ int
+ minstrel_stats_open(struct inode *inode, struct file *file)
+ {
+@@ -135,14 +119,6 @@ minstrel_stats_open(struct inode *inode,
+ return 0;
+ }
+
+-static const struct file_operations minstrel_stat_fops = {
+- .owner = THIS_MODULE,
+- .open = minstrel_stats_open,
+- .read = minstrel_stats_read,
+- .release = minstrel_stats_release,
+- .llseek = default_llseek,
+-};
+-
+ int
+ minstrel_stats_csv_open(struct inode *inode, struct file *file)
+ {
+@@ -200,21 +176,3 @@ minstrel_stats_csv_open(struct inode *in
+
+ return 0;
+ }
+-
+-static const struct file_operations minstrel_stat_csv_fops = {
+- .owner = THIS_MODULE,
+- .open = minstrel_stats_csv_open,
+- .read = minstrel_stats_read,
+- .release = minstrel_stats_release,
+- .llseek = default_llseek,
+-};
+-
+-void
+-minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
+-{
+- struct minstrel_sta_info *mi = priv_sta;
+-
+- debugfs_create_file("rc_stats", S_IRUGO, dir, mi, &minstrel_stat_fops);
+- debugfs_create_file("rc_stats_csv", S_IRUGO, dir, mi,
+- &minstrel_stat_csv_fops);
+-}
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -137,12 +137,10 @@
+ } \
+ }
+
+-#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
+ static bool minstrel_vht_only = true;
+ module_param(minstrel_vht_only, bool, 0644);
+ MODULE_PARM_DESC(minstrel_vht_only,
+ "Use only VHT rates when VHT is supported by sta.");
+-#endif
+
+ /*
+ * To enable sufficiently targeted rate sampling, MCS rates are divided into
+@@ -171,7 +169,6 @@ const struct mcs_group minstrel_mcs_grou
+
+ CCK_GROUP,
+
+-#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
+ VHT_GROUP(1, 0, BW_20),
+ VHT_GROUP(2, 0, BW_20),
+ VHT_GROUP(3, 0, BW_20),
+@@ -195,7 +192,6 @@ const struct mcs_group minstrel_mcs_grou
+ VHT_GROUP(1, 1, BW_80),
+ VHT_GROUP(2, 1, BW_80),
+ VHT_GROUP(3, 1, BW_80),
+-#endif
+ };
+
+ static u8 sample_table[SAMPLE_COLUMNS][MCS_GROUP_RATES] __read_mostly;
+@@ -1146,12 +1142,10 @@ minstrel_ht_update_caps(void *priv, stru
+
+ BUILD_BUG_ON(ARRAY_SIZE(minstrel_mcs_groups) != MINSTREL_GROUPS_NB);
+
+-#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
+ if (vht_cap->vht_supported)
+ use_vht = vht_cap->vht_mcs.tx_mcs_map != cpu_to_le16(~0);
+ else
+-#endif
+- use_vht = 0;
++ use_vht = 0;
+
+ msp->is_ht = true;
+ memset(mi, 0, sizeof(*mi));
+@@ -1226,10 +1220,9 @@ minstrel_ht_update_caps(void *priv, stru
+
+ /* HT rate */
+ if (gflags & IEEE80211_TX_RC_MCS) {
+-#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
+ if (use_vht && minstrel_vht_only)
+ continue;
+-#endif
++
+ mi->supported[i] = mcs->rx_mask[nss - 1];
+ if (mi->supported[i])
+ n_supported++;
+@@ -1349,16 +1342,88 @@ minstrel_ht_free_sta(void *priv, struct
+ kfree(msp);
+ }
+
++static void
++minstrel_ht_init_cck_rates(struct minstrel_priv *mp)
++{
++ static const int bitrates[4] = { 10, 20, 55, 110 };
++ struct ieee80211_supported_band *sband;
++ u32 rate_flags = ieee80211_chandef_rate_flags(&mp->hw->conf.chandef);
++ int i, j;
++
++ sband = mp->hw->wiphy->bands[NL80211_BAND_2GHZ];
++ if (!sband)
++ return;
++
++ for (i = 0, j = 0; i < sband->n_bitrates; i++) {
++ struct ieee80211_rate *rate = &sband->bitrates[i];
++
++ if (rate->flags & IEEE80211_RATE_ERP_G)
++ continue;
++
++ if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
++ continue;
++
++ for (j = 0; j < ARRAY_SIZE(bitrates); j++) {
++ if (rate->bitrate != bitrates[j])
++ continue;
++
++ mp->cck_rates[j] = i;
++ break;
++ }
++ }
++}
++
+ static void *
+ minstrel_ht_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
+ {
+- return mac80211_minstrel.alloc(hw, 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;
++
++ /* maximum time that the hw is allowed to stay in one MRR segment */
++ mp->segment_size = 6000;
++
++ if (hw->max_rate_tries > 0)
++ mp->max_retry = hw->max_rate_tries;
++ else
++ /* safe default, does not necessarily have to match hw properties */
++ mp->max_retry = 7;
++
++ if (hw->max_rates >= 4)
++ mp->has_mrr = true;
++
++ mp->hw = hw;
++ mp->update_interval = 100;
++
++#ifdef CPTCFG_MAC80211_DEBUGFS
++ mp->fixed_rate_idx = (u32) -1;
++ debugfs_create_u32("fixed_rate_idx", S_IRUGO | S_IWUGO, debugfsdir,
++ &mp->fixed_rate_idx);
++#endif
++
++ minstrel_ht_init_cck_rates(mp);
++
++ return mp;
+ }
+
+ static void
+ minstrel_ht_free(void *priv)
+ {
+- mac80211_minstrel.free(priv);
++ kfree(priv);
+ }
+
+ static u32 minstrel_ht_get_expected_throughput(void *priv_sta)
+@@ -1417,14 +1482,14 @@ static void __init init_sample_table(voi
+ }
+
+ int __init
+-rc80211_minstrel_ht_init(void)
++rc80211_minstrel_init(void)
+ {
+ init_sample_table();
+ return ieee80211_rate_control_register(&mac80211_minstrel_ht);
+ }
+
+ void
+-rc80211_minstrel_ht_exit(void)
++rc80211_minstrel_exit(void)
+ {
+ ieee80211_rate_control_unregister(&mac80211_minstrel_ht);
+ }
+--- a/net/mac80211/rc80211_minstrel_ht.h
++++ b/net/mac80211/rc80211_minstrel_ht.h
+@@ -15,11 +15,7 @@
+ */
+ #define MINSTREL_MAX_STREAMS 3
+ #define MINSTREL_HT_STREAM_GROUPS 4 /* BW(=2) * SGI(=2) */
+-#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
+ #define MINSTREL_VHT_STREAM_GROUPS 6 /* BW(=3) * SGI(=2) */
+-#else
+-#define MINSTREL_VHT_STREAM_GROUPS 0
+-#endif
+
+ #define MINSTREL_HT_GROUPS_NB (MINSTREL_MAX_STREAMS * \
+ MINSTREL_HT_STREAM_GROUPS)
+@@ -34,11 +30,7 @@
+ #define MINSTREL_CCK_GROUP (MINSTREL_HT_GROUP_0 + MINSTREL_HT_GROUPS_NB)
+ #define MINSTREL_VHT_GROUP_0 (MINSTREL_CCK_GROUP + 1)
+
+-#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
+ #define MCS_GROUP_RATES 10
+-#else
+-#define MCS_GROUP_RATES 8
+-#endif
+
+ struct mcs_group {
+ u32 flags;
+--- a/net/mac80211/rc80211_minstrel_ht_debugfs.c
++++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
+@@ -15,6 +15,22 @@
+ #include "rc80211_minstrel.h"
+ #include "rc80211_minstrel_ht.h"
+
++static ssize_t
++minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
++{
++ struct minstrel_debugfs_info *ms;
++
++ ms = file->private_data;
++ return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
++}
++
++static int
++minstrel_stats_release(struct inode *inode, struct file *file)
++{
++ kfree(file->private_data);
++ return 0;
++}
++
+ static char *
+ minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
+ {
--- /dev/null
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sat, 10 Feb 2018 12:45:47 +0100
+Subject: [PATCH] mac80211: minstrel: reduce minstrel_mcs_groups size
+
+By storing a shift value for all duration values of a group, we can
+reduce precision by a neglegible amount to make it fit into a u16 value.
+This improves cache footprint and reduces size:
+
+Before:
+ text data bss dec hex filename
+ 10024 116 0 10140 279c rc80211_minstrel_ht.o
+
+After:
+ text data bss dec hex filename
+ 9368 116 0 9484 250c rc80211_minstrel_ht.o
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -52,22 +52,23 @@
+ _streams - 1
+
+ /* MCS rate information for an MCS group */
+-#define MCS_GROUP(_streams, _sgi, _ht40) \
++#define MCS_GROUP(_streams, _sgi, _ht40, _s) \
+ [GROUP_IDX(_streams, _sgi, _ht40)] = { \
+ .streams = _streams, \
++ .shift = _s, \
+ .flags = \
+ IEEE80211_TX_RC_MCS | \
+ (_sgi ? IEEE80211_TX_RC_SHORT_GI : 0) | \
+ (_ht40 ? IEEE80211_TX_RC_40_MHZ_WIDTH : 0), \
+ .duration = { \
+- MCS_DURATION(_streams, _sgi, _ht40 ? 54 : 26), \
+- MCS_DURATION(_streams, _sgi, _ht40 ? 108 : 52), \
+- MCS_DURATION(_streams, _sgi, _ht40 ? 162 : 78), \
+- MCS_DURATION(_streams, _sgi, _ht40 ? 216 : 104), \
+- MCS_DURATION(_streams, _sgi, _ht40 ? 324 : 156), \
+- MCS_DURATION(_streams, _sgi, _ht40 ? 432 : 208), \
+- MCS_DURATION(_streams, _sgi, _ht40 ? 486 : 234), \
+- MCS_DURATION(_streams, _sgi, _ht40 ? 540 : 260) \
++ MCS_DURATION(_streams, _sgi, _ht40 ? 54 : 26) >> _s, \
++ MCS_DURATION(_streams, _sgi, _ht40 ? 108 : 52) >> _s, \
++ MCS_DURATION(_streams, _sgi, _ht40 ? 162 : 78) >> _s, \
++ MCS_DURATION(_streams, _sgi, _ht40 ? 216 : 104) >> _s, \
++ MCS_DURATION(_streams, _sgi, _ht40 ? 324 : 156) >> _s, \
++ MCS_DURATION(_streams, _sgi, _ht40 ? 432 : 208) >> _s, \
++ MCS_DURATION(_streams, _sgi, _ht40 ? 486 : 234) >> _s, \
++ MCS_DURATION(_streams, _sgi, _ht40 ? 540 : 260) >> _s \
+ } \
+ }
+
+@@ -80,9 +81,10 @@
+ #define BW2VBPS(_bw, r3, r2, r1) \
+ (_bw == BW_80 ? r3 : _bw == BW_40 ? r2 : r1)
+
+-#define VHT_GROUP(_streams, _sgi, _bw) \
++#define VHT_GROUP(_streams, _sgi, _bw, _s) \
+ [VHT_GROUP_IDX(_streams, _sgi, _bw)] = { \
+ .streams = _streams, \
++ .shift = _s, \
+ .flags = \
+ IEEE80211_TX_RC_VHT_MCS | \
+ (_sgi ? IEEE80211_TX_RC_SHORT_GI : 0) | \
+@@ -90,25 +92,25 @@
+ _bw == BW_40 ? IEEE80211_TX_RC_40_MHZ_WIDTH : 0), \
+ .duration = { \
+ MCS_DURATION(_streams, _sgi, \
+- BW2VBPS(_bw, 117, 54, 26)), \
++ BW2VBPS(_bw, 117, 54, 26)) >> _s, \
+ MCS_DURATION(_streams, _sgi, \
+- BW2VBPS(_bw, 234, 108, 52)), \
++ BW2VBPS(_bw, 234, 108, 52)) >> _s, \
+ MCS_DURATION(_streams, _sgi, \
+- BW2VBPS(_bw, 351, 162, 78)), \
++ BW2VBPS(_bw, 351, 162, 78)) >> _s, \
+ MCS_DURATION(_streams, _sgi, \
+- BW2VBPS(_bw, 468, 216, 104)), \
++ BW2VBPS(_bw, 468, 216, 104)) >> _s, \
+ MCS_DURATION(_streams, _sgi, \
+- BW2VBPS(_bw, 702, 324, 156)), \
++ BW2VBPS(_bw, 702, 324, 156)) >> _s, \
+ MCS_DURATION(_streams, _sgi, \
+- BW2VBPS(_bw, 936, 432, 208)), \
++ BW2VBPS(_bw, 936, 432, 208)) >> _s, \
+ MCS_DURATION(_streams, _sgi, \
+- BW2VBPS(_bw, 1053, 486, 234)), \
++ BW2VBPS(_bw, 1053, 486, 234)) >> _s, \
+ MCS_DURATION(_streams, _sgi, \
+- BW2VBPS(_bw, 1170, 540, 260)), \
++ BW2VBPS(_bw, 1170, 540, 260)) >> _s, \
+ MCS_DURATION(_streams, _sgi, \
+- BW2VBPS(_bw, 1404, 648, 312)), \
++ BW2VBPS(_bw, 1404, 648, 312)) >> _s, \
+ MCS_DURATION(_streams, _sgi, \
+- BW2VBPS(_bw, 1560, 720, 346)) \
++ BW2VBPS(_bw, 1560, 720, 346)) >> _s \
+ } \
+ }
+
+@@ -121,19 +123,20 @@
+ (CCK_DURATION((_bitrate > 10 ? 20 : 10), false, 60) + \
+ CCK_DURATION(_bitrate, _short, AVG_PKT_SIZE))
+
+-#define CCK_DURATION_LIST(_short) \
+- CCK_ACK_DURATION(10, _short), \
+- CCK_ACK_DURATION(20, _short), \
+- CCK_ACK_DURATION(55, _short), \
+- CCK_ACK_DURATION(110, _short)
++#define CCK_DURATION_LIST(_short, _s) \
++ CCK_ACK_DURATION(10, _short) >> _s, \
++ CCK_ACK_DURATION(20, _short) >> _s, \
++ CCK_ACK_DURATION(55, _short) >> _s, \
++ CCK_ACK_DURATION(110, _short) >> _s
+
+-#define CCK_GROUP \
++#define CCK_GROUP(_s) \
+ [MINSTREL_CCK_GROUP] = { \
+ .streams = 0, \
+ .flags = 0, \
++ .shift = _s, \
+ .duration = { \
+- CCK_DURATION_LIST(false), \
+- CCK_DURATION_LIST(true) \
++ CCK_DURATION_LIST(false, _s), \
++ CCK_DURATION_LIST(true, _s) \
+ } \
+ }
+
+@@ -151,47 +154,47 @@ MODULE_PARM_DESC(minstrel_vht_only,
+ * BW -> SGI -> #streams
+ */
+ const struct mcs_group minstrel_mcs_groups[] = {
+- MCS_GROUP(1, 0, BW_20),
+- MCS_GROUP(2, 0, BW_20),
+- MCS_GROUP(3, 0, BW_20),
++ MCS_GROUP(1, 0, BW_20, 5),
++ MCS_GROUP(2, 0, BW_20, 4),
++ MCS_GROUP(3, 0, BW_20, 4),
+
+- MCS_GROUP(1, 1, BW_20),
+- MCS_GROUP(2, 1, BW_20),
+- MCS_GROUP(3, 1, BW_20),
++ MCS_GROUP(1, 1, BW_20, 5),
++ MCS_GROUP(2, 1, BW_20, 4),
++ MCS_GROUP(3, 1, BW_20, 4),
+
+- MCS_GROUP(1, 0, BW_40),
+- MCS_GROUP(2, 0, BW_40),
+- MCS_GROUP(3, 0, BW_40),
++ MCS_GROUP(1, 0, BW_40, 4),
++ MCS_GROUP(2, 0, BW_40, 4),
++ MCS_GROUP(3, 0, BW_40, 4),
+
+- MCS_GROUP(1, 1, BW_40),
+- MCS_GROUP(2, 1, BW_40),
+- MCS_GROUP(3, 1, BW_40),
++ MCS_GROUP(1, 1, BW_40, 4),
++ MCS_GROUP(2, 1, BW_40, 4),
++ MCS_GROUP(3, 1, BW_40, 4),
+
+- CCK_GROUP,
++ CCK_GROUP(8),
+
+- VHT_GROUP(1, 0, BW_20),
+- VHT_GROUP(2, 0, BW_20),
+- VHT_GROUP(3, 0, BW_20),
++ VHT_GROUP(1, 0, BW_20, 5),
++ VHT_GROUP(2, 0, BW_20, 4),
++ VHT_GROUP(3, 0, BW_20, 4),
+
+- VHT_GROUP(1, 1, BW_20),
+- VHT_GROUP(2, 1, BW_20),
+- VHT_GROUP(3, 1, BW_20),
++ VHT_GROUP(1, 1, BW_20, 5),
++ VHT_GROUP(2, 1, BW_20, 4),
++ VHT_GROUP(3, 1, BW_20, 4),
+
+- VHT_GROUP(1, 0, BW_40),
+- VHT_GROUP(2, 0, BW_40),
+- VHT_GROUP(3, 0, BW_40),
++ VHT_GROUP(1, 0, BW_40, 4),
++ VHT_GROUP(2, 0, BW_40, 4),
++ VHT_GROUP(3, 0, BW_40, 4),
+
+- VHT_GROUP(1, 1, BW_40),
+- VHT_GROUP(2, 1, BW_40),
+- VHT_GROUP(3, 1, BW_40),
++ VHT_GROUP(1, 1, BW_40, 4),
++ VHT_GROUP(2, 1, BW_40, 4),
++ VHT_GROUP(3, 1, BW_40, 4),
+
+- VHT_GROUP(1, 0, BW_80),
+- VHT_GROUP(2, 0, BW_80),
+- VHT_GROUP(3, 0, BW_80),
++ VHT_GROUP(1, 0, BW_80, 4),
++ VHT_GROUP(2, 0, BW_80, 4),
++ VHT_GROUP(3, 0, BW_80, 4),
+
+- VHT_GROUP(1, 1, BW_80),
+- VHT_GROUP(2, 1, BW_80),
+- VHT_GROUP(3, 1, BW_80),
++ VHT_GROUP(1, 1, BW_80, 4),
++ VHT_GROUP(2, 1, BW_80, 4),
++ VHT_GROUP(3, 1, BW_80, 4),
+ };
+
+ static u8 sample_table[SAMPLE_COLUMNS][MCS_GROUP_RATES] __read_mostly;
+@@ -307,7 +310,8 @@ minstrel_ht_get_tp_avg(struct minstrel_h
+ if (group != MINSTREL_CCK_GROUP)
+ nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len);
+
+- nsecs += minstrel_mcs_groups[group].duration[rate];
++ nsecs += minstrel_mcs_groups[group].duration[rate] <<
++ minstrel_mcs_groups[group].shift;
+
+ /*
+ * For the throughput calculation, limit the probability value to 90% to
+@@ -755,12 +759,19 @@ minstrel_ht_tx_status(void *priv, struct
+ minstrel_ht_update_rates(mp, mi);
+ }
+
++static inline int
++minstrel_get_duration(int index)
++{
++ const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
++ unsigned int duration = group->duration[index % MCS_GROUP_RATES];
++ return duration << group->shift;
++}
++
+ static void
+ minstrel_calc_retransmit(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
+ int index)
+ {
+ struct minstrel_rate_stats *mrs;
+- const struct mcs_group *group;
+ unsigned int tx_time, tx_time_rtscts, tx_time_data;
+ unsigned int cw = mp->cw_min;
+ unsigned int ctime = 0;
+@@ -779,8 +790,7 @@ minstrel_calc_retransmit(struct minstrel
+ mrs->retry_count_rtscts = 2;
+ mrs->retry_updated = true;
+
+- group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
+- tx_time_data = group->duration[index % MCS_GROUP_RATES] * ampdu_len / 1000;
++ tx_time_data = minstrel_get_duration(index) * ampdu_len / 1000;
+
+ /* Contention time for first 2 tries */
+ ctime = (t_slot * cw) >> 1;
+@@ -874,20 +884,24 @@ minstrel_ht_get_max_amsdu_len(struct min
+ int group = mi->max_prob_rate / MCS_GROUP_RATES;
+ const struct mcs_group *g = &minstrel_mcs_groups[group];
+ int rate = mi->max_prob_rate % MCS_GROUP_RATES;
++ unsigned int duration;
+
+ /* Disable A-MSDU if max_prob_rate is bad */
+ if (mi->groups[group].rates[rate].prob_ewma < MINSTREL_FRAC(50, 100))
+ return 1;
+
++ duration = g->duration[rate];
++ duration <<= g->shift;
++
+ /* If the rate is slower than single-stream MCS1, make A-MSDU limit small */
+- if (g->duration[rate] > MCS_DURATION(1, 0, 52))
++ if (duration > MCS_DURATION(1, 0, 52))
+ return 500;
+
+ /*
+ * If the rate is slower than single-stream MCS4, limit A-MSDU to usual
+ * data packet size
+ */
+- if (g->duration[rate] > MCS_DURATION(1, 0, 104))
++ if (duration > MCS_DURATION(1, 0, 104))
+ return 1600;
+
+ /*
+@@ -895,7 +909,7 @@ minstrel_ht_get_max_amsdu_len(struct min
+ * rate success probability is less than 75%, limit A-MSDU to twice the usual
+ * data packet size
+ */
+- if (g->duration[rate] > MCS_DURATION(1, 0, 260) ||
++ if (duration > MCS_DURATION(1, 0, 260) ||
+ (minstrel_ht_get_prob_ewma(mi, mi->max_tp_rate[0]) <
+ MINSTREL_FRAC(75, 100)))
+ return 3200;
+@@ -942,13 +956,6 @@ minstrel_ht_update_rates(struct minstrel
+ rate_control_set_rates(mp->hw, mi->sta, rates);
+ }
+
+-static inline int
+-minstrel_get_duration(int index)
+-{
+- const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
+- return group->duration[index % MCS_GROUP_RATES];
+-}
+-
+ static int
+ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
+ {
+--- a/net/mac80211/rc80211_minstrel_ht.h
++++ b/net/mac80211/rc80211_minstrel_ht.h
+@@ -33,9 +33,10 @@
+ #define MCS_GROUP_RATES 10
+
+ struct mcs_group {
+- u32 flags;
+- unsigned int streams;
+- unsigned int duration[MCS_GROUP_RATES];
++ u16 flags;
++ u8 streams;
++ u8 shift;
++ u16 duration[MCS_GROUP_RATES];
+ };
+
+ extern const struct mcs_group minstrel_mcs_groups[];
+--- a/net/mac80211/rc80211_minstrel_ht_debugfs.c
++++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
+@@ -58,6 +58,7 @@ minstrel_ht_stats_dump(struct minstrel_h
+ static const int bitrates[4] = { 10, 20, 55, 110 };
+ int idx = i * MCS_GROUP_RATES + j;
+ unsigned int prob_ewmsd;
++ unsigned int duration;
+
+ if (!(mi->supported[i] & BIT(j)))
+ continue;
+@@ -95,7 +96,9 @@ minstrel_ht_stats_dump(struct minstrel_h
+ p += sprintf(p, " %3u ", idx);
+
+ /* tx_time[rate(i)] in usec */
+- tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
++ duration = mg->duration[j];
++ duration <<= mg->shift;
++ tx_time = DIV_ROUND_CLOSEST(duration, 1000);
+ p += sprintf(p, "%6u ", tx_time);
+
+ tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
+@@ -204,6 +207,7 @@ minstrel_ht_stats_csv_dump(struct minstr
+ static const int bitrates[4] = { 10, 20, 55, 110 };
+ int idx = i * MCS_GROUP_RATES + j;
+ unsigned int prob_ewmsd;
++ unsigned int duration;
+
+ if (!(mi->supported[i] & BIT(j)))
+ continue;
+@@ -238,7 +242,10 @@ minstrel_ht_stats_csv_dump(struct minstr
+ }
+
+ p += sprintf(p, "%u,", idx);
+- tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
++
++ duration = mg->duration[j];
++ duration <<= mg->shift;
++ tx_time = DIV_ROUND_CLOSEST(duration, 1000);
+ p += sprintf(p, "%u,", tx_time);
+
+ tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
--- /dev/null
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sat, 10 Feb 2018 13:43:07 +0100
+Subject: [PATCH] mac80211: minstrel: fix using short preamble CCK rates on
+ HT clients
+
+mi->supported[MINSTREL_CCK_GROUP] needs to be updated
+
+Fixes: 782dda00ab8e ("mac80211: minstrel_ht: move short preamble check out of get_rate")
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -1135,7 +1135,6 @@ minstrel_ht_update_caps(void *priv, stru
+ struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
+ u16 ht_cap = sta->ht_cap.cap;
+ struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
+- struct sta_info *sinfo = container_of(sta, struct sta_info, sta);
+ int use_vht;
+ int n_supported = 0;
+ int ack_dur;
+@@ -1267,8 +1266,7 @@ minstrel_ht_update_caps(void *priv, stru
+ if (!n_supported)
+ goto use_legacy;
+
+- if (test_sta_flag(sinfo, WLAN_STA_SHORT_PREAMBLE))
+- mi->cck_supported_short |= mi->cck_supported_short << 4;
++ mi->supported[MINSTREL_CCK_GROUP] |= mi->cck_supported_short << 4;
+
+ /* create an initial rate table with the lowest supported rates */
+ minstrel_ht_update_stats(mp, mi);
--- /dev/null
+From: Felix Fietkau <nbd@nbd.name>
+Date: Thu, 1 Mar 2018 13:27:54 +0100
+Subject: [PATCH] mac80211: minstrel: fix CCK rate group streams value
+
+Fixes a harmless underflow issue when CCK rates are actively being used
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -131,7 +131,7 @@
+
+ #define CCK_GROUP(_s) \
+ [MINSTREL_CCK_GROUP] = { \
+- .streams = 0, \
++ .streams = 1, \
+ .flags = 0, \
+ .shift = _s, \
+ .duration = { \
--- /dev/null
+From: Felix Fietkau <nbd@nbd.name>
+Date: Thu, 1 Mar 2018 13:28:48 +0100
+Subject: [PATCH] mac80211: minstrel: fix sampling/reporting of CCK rates
+ in HT mode
+
+Long/short preamble selection cannot be sampled separately, since it
+depends on the BSS state. Because of that, sampling attempts to
+currently not used preamble modes are not counted in the statistics,
+which leads to CCK rates being sampled too often.
+
+Fix statistics accounting for long/short preamble by increasing the
+index where necessary.
+Fix excessive CCK rate sampling by dropping unsupported sample attempts.
+
+This improves throughput on 2.4 GHz channels
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -281,7 +281,8 @@ minstrel_ht_get_stats(struct minstrel_pr
+ break;
+
+ /* short preamble */
+- if (!(mi->supported[group] & BIT(idx)))
++ if ((mi->supported[group] & BIT(idx + 4)) &&
++ (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE))
+ idx += 4;
+ }
+ return &mi->groups[group].rates[idx];
+@@ -1080,18 +1081,23 @@ minstrel_ht_get_rate(void *priv, struct
+ return;
+
+ sample_group = &minstrel_mcs_groups[sample_idx / MCS_GROUP_RATES];
++ sample_idx %= MCS_GROUP_RATES;
++
++ if (sample_group == &minstrel_mcs_groups[MINSTREL_CCK_GROUP] &&
++ (sample_idx >= 4) != txrc->short_preamble)
++ return;
++
+ info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
+ rate->count = 1;
+
+- if (sample_idx / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) {
++ if (sample_group == &minstrel_mcs_groups[MINSTREL_CCK_GROUP]) {
+ int idx = sample_idx % ARRAY_SIZE(mp->cck_rates);
+ rate->idx = mp->cck_rates[idx];
+ } else if (sample_group->flags & IEEE80211_TX_RC_VHT_MCS) {
+ ieee80211_rate_set_vht(rate, sample_idx % MCS_GROUP_RATES,
+ sample_group->streams);
+ } else {
+- rate->idx = sample_idx % MCS_GROUP_RATES +
+- (sample_group->streams - 1) * 8;
++ rate->idx = sample_idx + (sample_group->streams - 1) * 8;
+ }
+
+ rate->flags = sample_group->flags;
--- /dev/null
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sat, 3 Mar 2018 18:48:58 +0100
+Subject: [PATCH] mac80211: minstrel: do not sample rates 3 times slower than
+ max_prob_rate
+
+These rates are highly unlikely to be used quickly, even if the link
+deteriorates rapidly. This improves throughput in cases where CCK rates
+are not reliable enough to be skipped entirely during sampling.
+Sampling these rates regularly can cost a lot of airtime.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -1004,10 +1004,13 @@ minstrel_get_sample_rate(struct minstrel
+ return -1;
+
+ /*
+- * Do not sample if the probability is already higher than 95%
+- * to avoid wasting airtime.
++ * Do not sample if the probability is already higher than 95%,
++ * or if the rate is 3 times slower than the current max probability
++ * rate, to avoid wasting airtime.
+ */
+- if (mrs->prob_ewma > MINSTREL_FRAC(95, 100))
++ sample_dur = minstrel_get_duration(sample_idx);
++ if (mrs->prob_ewma > MINSTREL_FRAC(95, 100) ||
++ minstrel_get_duration(mi->max_prob_rate) * 3 < sample_dur)
+ return -1;
+
+ /*
+@@ -1017,7 +1020,6 @@ minstrel_get_sample_rate(struct minstrel
+
+ cur_max_tp_streams = minstrel_mcs_groups[tp_rate1 /
+ MCS_GROUP_RATES].streams;
+- sample_dur = minstrel_get_duration(sample_idx);
+ if (sample_dur >= minstrel_get_duration(tp_rate2) &&
+ (cur_max_tp_streams - 1 <
+ minstrel_mcs_groups[sample_group].streams ||
--- /dev/null
+From: Felix Fietkau <nbd@nbd.name>
+Date: Thu, 8 Mar 2018 21:00:56 +0100
+Subject: [PATCH] mac80211: fix memory accounting with A-MSDU aggregation
+
+fq uses skb->truesize for memory usage tracking. Increments/decrements
+are done on enqueue/dequeue.
+When A-MSDU aggregation is performed on tx side, the packet is
+aggregated with the last packet in the queue belonging to the same flow.
+There are multiple bugs here:
+- The truesize field of the aggregated packet isn't updated, so memory
+usage is underestimated
+- fq->memory_usage isn't adjusted.
+
+Because of the combination of both bugs, this only causes tx issues in
+rare cases, mainly when the A-MSDU head needs to be reallocated.
+
+Fix this by adjusting both truesize of the A-MSDU head and adding the
+truesize delta to fq->memory_usage.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/tx.c
++++ b/net/mac80211/tx.c
+@@ -3185,6 +3185,7 @@ static bool ieee80211_amsdu_aggregate(st
+ u8 max_subframes = sta->sta.max_amsdu_subframes;
+ int max_frags = local->hw.max_tx_fragments;
+ int max_amsdu_len = sta->sta.max_amsdu_len;
++ int orig_truesize;
+ __be16 len;
+ void *data;
+ bool ret = false;
+@@ -3216,12 +3217,13 @@ static bool ieee80211_amsdu_aggregate(st
+ flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
+ head = skb_peek_tail(&flow->queue);
+ if (!head)
+- goto out;
++ goto unlock;
+
++ orig_truesize = head->truesize;
+ orig_len = head->len;
+
+ if (skb->len + head->len > max_amsdu_len)
+- goto out;
++ goto unlock;
+
+ nfrags = 1 + skb_shinfo(skb)->nr_frags;
+ nfrags += 1 + skb_shinfo(head)->nr_frags;
+@@ -3279,6 +3281,9 @@ out_recalc:
+ fq_recalc_backlog(fq, tin, flow);
+ }
+ out:
++ fq->memory_usage += head->truesize - orig_truesize;
++
++unlock:
+ spin_unlock_bh(&fq->lock);
+
+ return ret;
--- /dev/null
+From: Felix Fietkau <nbd@nbd.name>
+Date: Wed, 16 Jan 2019 22:32:12 +0100
+Subject: [PATCH] mac80211: minstrel_ht: add flag to indicate
+ missing/inaccurate tx A-MPDU length
+
+Some hardware (e.g. MediaTek MT7603) cannot report A-MPDU length in tx status
+information. Add support for a flag to indicate that, to allow minstrel_ht
+to use a fixed value in its internal calculation (which gives better results
+than just defaulting to 1).
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+Signed-off-by: Johannes Berg <johannes.berg@intel.com>
+---
+
+--- a/include/net/mac80211.h
++++ b/include/net/mac80211.h
+@@ -2131,6 +2131,9 @@ struct ieee80211_txq {
+ * @IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP: The driver (or firmware) doesn't
+ * support QoS NDP for AP probing - that's most likely a driver bug.
+ *
++ * @IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN: Driver does not report accurate A-MPDU
++ * length in tx status information
++ *
+ * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
+ */
+ enum ieee80211_hw_flags {
+@@ -2176,6 +2179,7 @@ enum ieee80211_hw_flags {
+ IEEE80211_HW_SUPPORTS_TDLS_BUFFER_STA,
+ IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP,
+ IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP,
++ IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN,
+
+ /* keep last, obviously */
+ NUM_IEEE80211_HW_FLAGS
+--- a/net/mac80211/debugfs.c
++++ b/net/mac80211/debugfs.c
+@@ -214,6 +214,7 @@ static const char *hw_flag_names[] = {
+ FLAG(SUPPORTS_TDLS_BUFFER_STA),
+ FLAG(DEAUTH_NEED_MGD_TX_PREP),
+ FLAG(DOESNT_SUPPORT_QOS_NDP),
++ FLAG(TX_STATUS_NO_AMPDU_LEN),
+ #undef FLAG
+ };
+
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -294,6 +294,15 @@ minstrel_get_ratestats(struct minstrel_h
+ return &mi->groups[index / MCS_GROUP_RATES].rates[index % MCS_GROUP_RATES];
+ }
+
++static unsigned int
++minstrel_ht_avg_ampdu_len(struct minstrel_ht_sta *mi)
++{
++ if (!mi->avg_ampdu_len)
++ return AVG_AMPDU_SIZE;
++
++ return MINSTREL_TRUNC(mi->avg_ampdu_len);
++}
++
+ /*
+ * Return current throughput based on the average A-MPDU length, taking into
+ * account the expected number of retransmissions and their expected length
+@@ -309,7 +318,7 @@ minstrel_ht_get_tp_avg(struct minstrel_h
+ return 0;
+
+ if (group != MINSTREL_CCK_GROUP)
+- nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len);
++ nsecs = 1000 * mi->overhead / minstrel_ht_avg_ampdu_len(mi);
+
+ nsecs += minstrel_mcs_groups[group].duration[rate] <<
+ minstrel_mcs_groups[group].shift;
+@@ -503,8 +512,12 @@ minstrel_ht_update_stats(struct minstrel
+ u16 tmp_cck_tp_rate[MAX_THR_RATES], index;
+
+ if (mi->ampdu_packets > 0) {
+- mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len,
+- MINSTREL_FRAC(mi->ampdu_len, mi->ampdu_packets), EWMA_LEVEL);
++ if (!ieee80211_hw_check(mp->hw, TX_STATUS_NO_AMPDU_LEN))
++ mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len,
++ MINSTREL_FRAC(mi->ampdu_len, mi->ampdu_packets),
++ EWMA_LEVEL);
++ else
++ mi->avg_ampdu_len = 0;
+ mi->ampdu_len = 0;
+ mi->ampdu_packets = 0;
+ }
+@@ -709,7 +722,9 @@ minstrel_ht_tx_status(void *priv, struct
+ mi->ampdu_len += info->status.ampdu_len;
+
+ if (!mi->sample_wait && !mi->sample_tries && mi->sample_count > 0) {
+- mi->sample_wait = 16 + 2 * MINSTREL_TRUNC(mi->avg_ampdu_len);
++ int avg_ampdu_len = minstrel_ht_avg_ampdu_len(mi);
++
++ mi->sample_wait = 16 + 2 * avg_ampdu_len;
+ mi->sample_tries = 1;
+ mi->sample_count--;
+ }
+@@ -777,7 +792,7 @@ minstrel_calc_retransmit(struct minstrel
+ unsigned int cw = mp->cw_min;
+ unsigned int ctime = 0;
+ unsigned int t_slot = 9; /* FIXME */
+- unsigned int ampdu_len = MINSTREL_TRUNC(mi->avg_ampdu_len);
++ unsigned int ampdu_len = minstrel_ht_avg_ampdu_len(mi);
+ unsigned int overhead = 0, overhead_rtscts = 0;
+
+ mrs = minstrel_get_ratestats(mi, index);
+--- a/net/mac80211/rc80211_minstrel_ht_debugfs.c
++++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
+@@ -163,9 +163,10 @@ minstrel_ht_stats_open(struct inode *ino
+ "lookaround %d\n",
+ max(0, (int) mi->total_packets - (int) mi->sample_packets),
+ mi->sample_packets);
+- p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
+- MINSTREL_TRUNC(mi->avg_ampdu_len),
+- MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
++ if (mi->avg_ampdu_len)
++ p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
++ MINSTREL_TRUNC(mi->avg_ampdu_len),
++ MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
+ ms->len = p - ms->buf;
+ WARN_ON(ms->len + sizeof(*ms) > 32768);
+
--- /dev/null
+From: Janusz Dziedzic <janusz.dziedzic@tieto.com>
+Date: Fri, 19 Feb 2016 11:01:49 +0100
+Subject: [PATCH] mac80211: add hdrlen to ieee80211_tx_data
+
+This is preparation for adding support for inserting padding between the
+802.11 header and LLC data
+
+Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/net/mac80211/ieee80211_i.h
++++ b/net/mac80211/ieee80211_i.h
+@@ -179,6 +179,7 @@ struct ieee80211_tx_data {
+ struct ieee80211_tx_rate rate;
+
+ unsigned int flags;
++ unsigned int hdrlen;
+ };
+
+
+--- a/net/mac80211/tx.c
++++ b/net/mac80211/tx.c
+@@ -925,7 +925,7 @@ ieee80211_tx_h_fragment(struct ieee80211
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_hdr *hdr = (void *)skb->data;
+ int frag_threshold = tx->local->hw.wiphy->frag_threshold;
+- int hdrlen;
++ int hdrlen = tx->hdrlen;
+ int fragnum;
+
+ /* no matter what happens, tx->skb moves to tx->skbs */
+@@ -946,8 +946,6 @@ ieee80211_tx_h_fragment(struct ieee80211
+ if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
+ return TX_DROP;
+
+- hdrlen = ieee80211_hdrlen(hdr->frame_control);
+-
+ /* internal error, why isn't DONTFRAG set? */
+ if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
+ return TX_DROP;
+@@ -1178,6 +1176,8 @@ ieee80211_tx_prepare(struct ieee80211_su
+
+ hdr = (struct ieee80211_hdr *) skb->data;
+
++ tx->hdrlen = ieee80211_hdrlen(hdr->frame_control);
++
+ if (likely(sta)) {
+ if (!IS_ERR(sta))
+ tx->sta = sta;
+@@ -3518,6 +3518,7 @@ begin:
+ tx.local = local;
+ tx.skb = skb;
+ tx.sdata = vif_to_sdata(info->control.vif);
++ tx.hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+ if (txq->sta)
+ tx.sta = container_of(txq->sta, struct sta_info, sta);
+@@ -3544,7 +3545,7 @@ begin:
+
+ if (tx.key &&
+ (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
+- pn_offs = ieee80211_hdrlen(hdr->frame_control);
++ pn_offs = tx.hdrlen;
+
+ ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
+ tx.key, skb);
+@@ -3855,6 +3856,7 @@ ieee80211_build_data_template(struct iee
+ hdr = (void *)skb->data;
+ tx.sta = sta_info_get(sdata, hdr->addr1);
+ tx.skb = skb;
++ tx.hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+ if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
+ rcu_read_unlock();
+--- a/net/mac80211/util.c
++++ b/net/mac80211/util.c
+@@ -1390,6 +1390,7 @@ void ieee80211_send_auth(struct ieee8021
+ struct ieee80211_local *local = sdata->local;
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *mgmt;
++ unsigned int hdrlen;
+ int err;
+
+ /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
+@@ -1413,8 +1414,10 @@ void ieee80211_send_auth(struct ieee8021
+ skb_put_data(skb, extra, extra_len);
+
+ if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
++ hdrlen = ieee80211_hdrlen(mgmt->frame_control);
+ mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+- err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
++ err = ieee80211_wep_encrypt(local, skb, hdrlen, key,
++ key_len, key_idx);
+ WARN_ON(err);
+ }
+
+--- a/net/mac80211/wep.c
++++ b/net/mac80211/wep.c
+@@ -89,11 +89,11 @@ static void ieee80211_wep_get_iv(struct
+
+ static u8 *ieee80211_wep_add_iv(struct ieee80211_local *local,
+ struct sk_buff *skb,
++ unsigned int hdrlen,
+ int keylen, int keyidx)
+ {
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+- unsigned int hdrlen;
+ u8 *newhdr;
+
+ hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+@@ -101,7 +101,6 @@ static u8 *ieee80211_wep_add_iv(struct i
+ if (WARN_ON(skb_headroom(skb) < IEEE80211_WEP_IV_LEN))
+ return NULL;
+
+- hdrlen = ieee80211_hdrlen(hdr->frame_control);
+ newhdr = skb_push(skb, IEEE80211_WEP_IV_LEN);
+ memmove(newhdr, newhdr + IEEE80211_WEP_IV_LEN, hdrlen);
+
+@@ -160,6 +159,7 @@ int ieee80211_wep_encrypt_data(struct cr
+ */
+ int ieee80211_wep_encrypt(struct ieee80211_local *local,
+ struct sk_buff *skb,
++ unsigned int hdrlen,
+ const u8 *key, int keylen, int keyidx)
+ {
+ u8 *iv;
+@@ -169,7 +169,7 @@ int ieee80211_wep_encrypt(struct ieee802
+ if (WARN_ON(skb_tailroom(skb) < IEEE80211_WEP_ICV_LEN))
+ return -1;
+
+- iv = ieee80211_wep_add_iv(local, skb, keylen, keyidx);
++ iv = ieee80211_wep_add_iv(local, skb, hdrlen, keylen, keyidx);
+ if (!iv)
+ return -1;
+
+@@ -307,13 +307,14 @@ static int wep_encrypt_skb(struct ieee80
+ struct ieee80211_key_conf *hw_key = info->control.hw_key;
+
+ if (!hw_key) {
+- if (ieee80211_wep_encrypt(tx->local, skb, tx->key->conf.key,
++ if (ieee80211_wep_encrypt(tx->local, skb, tx->hdrlen,
++ tx->key->conf.key,
+ tx->key->conf.keylen,
+ tx->key->conf.keyidx))
+ return -1;
+ } else if ((hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
+ (hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
+- if (!ieee80211_wep_add_iv(tx->local, skb,
++ if (!ieee80211_wep_add_iv(tx->local, skb, tx->hdrlen,
+ tx->key->conf.keylen,
+ tx->key->conf.keyidx))
+ return -1;
+--- a/net/mac80211/wep.h
++++ b/net/mac80211/wep.h
+@@ -22,6 +22,7 @@ int ieee80211_wep_encrypt_data(struct cr
+ size_t klen, u8 *data, size_t data_len);
+ int ieee80211_wep_encrypt(struct ieee80211_local *local,
+ struct sk_buff *skb,
++ unsigned int hdrlen,
+ const u8 *key, int keylen, int keyidx);
+ int ieee80211_wep_decrypt_data(struct crypto_cipher *tfm, u8 *rc4key,
+ size_t klen, u8 *data, size_t data_len);
+--- a/net/mac80211/wpa.c
++++ b/net/mac80211/wpa.c
+@@ -44,7 +44,7 @@ ieee80211_tx_h_michael_mic_add(struct ie
+ skb->len < 24 || !ieee80211_is_data_present(hdr->frame_control))
+ return TX_CONTINUE;
+
+- hdrlen = ieee80211_hdrlen(hdr->frame_control);
++ hdrlen = tx->hdrlen;
+ if (skb->len < hdrlen)
+ return TX_DROP;
+
+@@ -195,7 +195,6 @@ mic_fail_no_key:
+
+ static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
+ {
+- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ struct ieee80211_key *key = tx->key;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ unsigned int hdrlen;
+@@ -210,7 +209,7 @@ static int tkip_encrypt_skb(struct ieee8
+ return 0;
+ }
+
+- hdrlen = ieee80211_hdrlen(hdr->frame_control);
++ hdrlen = tx->hdrlen;
+ len = skb->len - hdrlen;
+
+ if (info->control.hw_key)
+@@ -428,7 +427,7 @@ static int ccmp_encrypt_skb(struct ieee8
+ return 0;
+ }
+
+- hdrlen = ieee80211_hdrlen(hdr->frame_control);
++ hdrlen = tx->hdrlen;
+ len = skb->len - hdrlen;
+
+ if (info->control.hw_key)
+@@ -660,7 +659,7 @@ static int gcmp_encrypt_skb(struct ieee8
+ return 0;
+ }
+
+- hdrlen = ieee80211_hdrlen(hdr->frame_control);
++ hdrlen = tx->hdrlen;
+ len = skb->len - hdrlen;
+
+ if (info->control.hw_key)
+@@ -800,7 +799,6 @@ static ieee80211_tx_result
+ ieee80211_crypto_cs_encrypt(struct ieee80211_tx_data *tx,
+ struct sk_buff *skb)
+ {
+- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ struct ieee80211_key *key = tx->key;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ int hdrlen;
+@@ -816,8 +814,7 @@ ieee80211_crypto_cs_encrypt(struct ieee8
+ pskb_expand_head(skb, iv_len, 0, GFP_ATOMIC)))
+ return TX_DROP;
+
+- hdrlen = ieee80211_hdrlen(hdr->frame_control);
+-
++ hdrlen = tx->hdrlen;
+ pos = skb_push(skb, iv_len);
+ memmove(pos, pos + iv_len, hdrlen);
+
--- /dev/null
+From: Janusz Dziedzic <janusz.dziedzic@tieto.com>
+Date: Sun, 10 Mar 2019 17:22:08 +0100
+Subject: [PATCH] mac80211: add TX_NEEDS_ALIGNED4_SKBS hw flag
+
+The driver should set this flag if the hardware requires tx skb data
+(starting with the LLC header) to be aligned to 4 bytes.
+
+Padding is added after ieee80211_hdr, before IV/LLC.
+
+Before this patch, we have to do memmove(hdrlen) twice in the driver:
+Once before we pass this to HW and once again in tx completion
+(to fix up the skb for monitor mode).
+
+With this patch we can skip this memmove() and thus reduce CPU cycles in
+the data path.
+
+Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/include/net/mac80211.h
++++ b/include/net/mac80211.h
+@@ -2134,6 +2134,9 @@ struct ieee80211_txq {
+ * @IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN: Driver does not report accurate A-MPDU
+ * length in tx status information
+ *
++ * @IEEE80211_HW_TX_NEEDS_ALIGNED4_SKBS: Driver need aligned skbs to four-byte.
++ * Padding will be added after ieee80211_hdr, before IV/LLC.
++ *
+ * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
+ */
+ enum ieee80211_hw_flags {
+@@ -2180,6 +2183,7 @@ enum ieee80211_hw_flags {
+ IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP,
+ IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP,
+ IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN,
++ IEEE80211_HW_TX_NEEDS_ALIGNED4_SKBS,
+
+ /* keep last, obviously */
+ NUM_IEEE80211_HW_FLAGS
+@@ -2462,6 +2466,40 @@ ieee80211_get_alt_retry_rate(const struc
+ void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb);
+
+ /**
++ * ieee80211_hdr_padsize - get size of padding between 802.11 header and LLC
++ * @hw: the hardware
++ * @hdrlen: 802.11 header length
++ */
++static inline unsigned int
++ieee80211_hdr_padsize(struct ieee80211_hw *hw, unsigned int hdrlen)
++{
++ /*
++ * While hdrlen is already aligned to two-byte boundaries,
++ * simple check with & 2 will return correct padsize.
++ */
++ if (ieee80211_hw_check(hw, TX_NEEDS_ALIGNED4_SKBS))
++ return hdrlen & 2;
++ return 0;
++}
++
++/**
++ * ieee80211_padded_hdrlen - get padded 802.11 header size
++ * @hw: the hardware
++ * @fc: frame control field in little-endian format
++ */
++static inline unsigned int
++ieee80211_padded_hdrlen(struct ieee80211_hw *hw, __le16 fc)
++{
++ unsigned int hdrlen;
++
++ hdrlen = ieee80211_hdrlen(fc);
++ hdrlen += ieee80211_hdr_padsize(hw, hdrlen);
++
++ return hdrlen;
++}
++
++
++/**
+ * DOC: Hardware crypto acceleration
+ *
+ * mac80211 is capable of taking advantage of many hardware
+--- a/net/mac80211/iface.c
++++ b/net/mac80211/iface.c
+@@ -1871,6 +1871,10 @@ int ieee80211_if_add(struct ieee80211_lo
+ + 8 /* rfc1042/bridge tunnel */
+ - ETH_HLEN /* ethernet hard_header_len */
+ + IEEE80211_ENCRYPT_HEADROOM;
++
++ if (ieee80211_hw_check(&local->hw, TX_NEEDS_ALIGNED4_SKBS))
++ ndev->needed_headroom += 2; /* padding */
++
+ ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
+
+ ret = dev_alloc_name(ndev, ndev->name);
+--- a/net/mac80211/mesh_pathtbl.c
++++ b/net/mac80211/mesh_pathtbl.c
+@@ -103,13 +103,15 @@ void mesh_path_assign_nexthop(struct mes
+ static void prepare_for_gate(struct sk_buff *skb, char *dst_addr,
+ struct mesh_path *gate_mpath)
+ {
++ struct ieee80211_sub_if_data *sdata = gate_mpath->sdata;
++ struct ieee80211_hw *hw = &sdata->local->hw;
+ struct ieee80211_hdr *hdr;
+ struct ieee80211s_hdr *mshdr;
+ int mesh_hdrlen, hdrlen;
+ char *next_hop;
+
+ hdr = (struct ieee80211_hdr *) skb->data;
+- hdrlen = ieee80211_hdrlen(hdr->frame_control);
++ hdrlen = ieee80211_padded_hdrlen(hw, hdr->frame_control);
+ mshdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
+
+ if (!(mshdr->flags & MESH_FLAGS_AE)) {
+--- a/net/mac80211/rx.c
++++ b/net/mac80211/rx.c
+@@ -2597,7 +2597,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80
+ struct ieee80211_local *local = rx->local;
+ struct ieee80211_sub_if_data *sdata = rx->sdata;
+ struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+- u16 ac, q, hdrlen;
++ u16 ac, q, hdrlen, padsize;
+ int tailroom = 0;
+
+ hdr = (struct ieee80211_hdr *) skb->data;
+@@ -2688,7 +2688,9 @@ ieee80211_rx_h_mesh_fwding(struct ieee80
+ if (sdata->crypto_tx_tailroom_needed_cnt)
+ tailroom = IEEE80211_ENCRYPT_TAILROOM;
+
+- fwd_skb = skb_copy_expand(skb, local->tx_headroom +
++ padsize = ieee80211_hdr_padsize(&local->hw, hdrlen);
++
++ fwd_skb = skb_copy_expand(skb, local->tx_headroom + padsize +
+ sdata->encrypt_headroom,
+ tailroom, GFP_ATOMIC);
+ if (!fwd_skb)
+@@ -2720,6 +2722,12 @@ ieee80211_rx_h_mesh_fwding(struct ieee80
+ return RX_DROP_MONITOR;
+ }
+
++ if (padsize) {
++ skb_push(fwd_skb, padsize);
++ memmove(fwd_skb->data, skb->data + padsize, hdrlen);
++ memset(fwd_skb->data + hdrlen, 0, padsize);
++ }
++
+ IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
+ ieee80211_add_pending_skb(local, fwd_skb);
+ out:
+--- a/net/mac80211/sta_info.h
++++ b/net/mac80211/sta_info.h
+@@ -301,7 +301,7 @@ struct ieee80211_fast_tx {
+ u8 hdr_len;
+ u8 sa_offs, da_offs, pn_offs;
+ u8 band;
+- u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
++ u8 hdr[30 + 2 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
+ sizeof(rfc1042_header)] __aligned(2);
+
+ struct rcu_head rcu_head;
+--- a/net/mac80211/status.c
++++ b/net/mac80211/status.c
+@@ -515,6 +515,7 @@ static void ieee80211_report_used_skb(st
+ {
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_hdr *hdr = (void *)skb->data;
++ struct ieee80211_hw *hw = &local->hw;
+ bool acked = info->flags & IEEE80211_TX_STAT_ACK;
+
+ if (dropped)
+@@ -531,7 +532,7 @@ static void ieee80211_report_used_skb(st
+ skb->dev = NULL;
+ } else {
+ unsigned int hdr_size =
+- ieee80211_hdrlen(hdr->frame_control);
++ ieee80211_padded_hdrlen(hw, hdr->frame_control);
+
+ /* Check to see if packet is a TDLS teardown packet */
+ if (ieee80211_is_data(hdr->frame_control) &&
+@@ -655,9 +656,22 @@ void ieee80211_tx_monitor(struct ieee802
+ struct sk_buff *skb2;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_sub_if_data *sdata;
++ struct ieee80211_hdr *hdr = (void *)skb->data;
+ struct net_device *prev_dev = NULL;
++ unsigned int hdrlen, padsize;
+ int rtap_len;
+
++ /* Remove padding if was added */
++ if (ieee80211_hw_check(&local->hw, TX_NEEDS_ALIGNED4_SKBS)) {
++ hdrlen = ieee80211_hdrlen(hdr->frame_control);
++ padsize = ieee80211_hdr_padsize(&local->hw, hdrlen);
++
++ if (padsize && skb->len > hdrlen + padsize) {
++ memmove(skb->data + padsize, skb->data, hdrlen);
++ skb_pull(skb, padsize);
++ }
++ }
++
+ /* send frame to monitor interfaces now */
+ rtap_len = ieee80211_tx_radiotap_len(info);
+ if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
+--- a/net/mac80211/tkip.c
++++ b/net/mac80211/tkip.c
+@@ -201,10 +201,12 @@ void ieee80211_get_tkip_p2k(struct ieee8
+ {
+ struct ieee80211_key *key = (struct ieee80211_key *)
+ container_of(keyconf, struct ieee80211_key, conf);
++ struct ieee80211_hw *hw = &key->local->hw;
+ const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
+ struct tkip_ctx *ctx = &key->u.tkip.tx;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+- const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
++ const u8 *data = (u8 *)hdr + ieee80211_padded_hdrlen(hw,
++ hdr->frame_control);
+ u32 iv32 = get_unaligned_le32(&data[4]);
+ u16 iv16 = data[2] | (data[0] << 8);
+
+--- a/net/mac80211/tx.c
++++ b/net/mac80211/tx.c
+@@ -1175,8 +1175,7 @@ ieee80211_tx_prepare(struct ieee80211_su
+ info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
+
+ hdr = (struct ieee80211_hdr *) skb->data;
+-
+- tx->hdrlen = ieee80211_hdrlen(hdr->frame_control);
++ tx->hdrlen = ieee80211_padded_hdrlen(&local->hw, hdr->frame_control);
+
+ if (likely(sta)) {
+ if (!IS_ERR(sta))
+@@ -2215,7 +2214,7 @@ netdev_tx_t ieee80211_monitor_start_xmit
+ goto fail;
+
+ hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
+- hdrlen = ieee80211_hdrlen(hdr->frame_control);
++ hdrlen = ieee80211_padded_hdrlen(&local->hw, hdr->frame_control);
+
+ if (skb->len < len_rthdr + hdrlen)
+ goto fail;
+@@ -2433,7 +2432,7 @@ static struct sk_buff *ieee80211_build_h
+ struct ieee80211_chanctx_conf *chanctx_conf;
+ struct ieee80211_sub_if_data *ap_sdata;
+ enum nl80211_band band;
+- int ret;
++ int padsize, ret;
+
+ if (IS_ERR(sta))
+ sta = NULL;
+@@ -2732,7 +2731,9 @@ static struct sk_buff *ieee80211_build_h
+ }
+
+ skb_pull(skb, skip_header_bytes);
++ padsize = ieee80211_hdr_padsize(&local->hw, hdrlen);
+ head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
++ head_need += padsize;
+
+ /*
+ * So we need to modify the skb header and hence need a copy of
+@@ -2765,6 +2766,9 @@ static struct sk_buff *ieee80211_build_h
+ memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
+ #endif
+
++ if (padsize)
++ memset(skb_push(skb, padsize), 0, padsize);
++
+ if (ieee80211_is_data_qos(fc)) {
+ __le16 *qos_control;
+
+@@ -2940,6 +2944,8 @@ void ieee80211_check_fast_xmit(struct st
+ fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
+ }
+
++ build.hdr_len += ieee80211_hdr_padsize(&local->hw, build.hdr_len);
++
+ /* We store the key here so there's no point in using rcu_dereference()
+ * but that's fine because the code that changes the pointers will call
+ * this function after doing so. For a single CPU that would be enough,
+@@ -3518,7 +3524,7 @@ begin:
+ tx.local = local;
+ tx.skb = skb;
+ tx.sdata = vif_to_sdata(info->control.vif);
+- tx.hdrlen = ieee80211_hdrlen(hdr->frame_control);
++ tx.hdrlen = ieee80211_padded_hdrlen(hw, hdr->frame_control);
+
+ if (txq->sta)
+ tx.sta = container_of(txq->sta, struct sta_info, sta);
+@@ -3856,7 +3862,7 @@ ieee80211_build_data_template(struct iee
+ hdr = (void *)skb->data;
+ tx.sta = sta_info_get(sdata, hdr->addr1);
+ tx.skb = skb;
+- tx.hdrlen = ieee80211_hdrlen(hdr->frame_control);
++ tx.hdrlen = ieee80211_padded_hdrlen(&tx.local->hw, hdr->frame_control);
+
+ if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
+ rcu_read_unlock();
+--- a/net/mac80211/debugfs.c
++++ b/net/mac80211/debugfs.c
+@@ -215,6 +215,7 @@ static const char *hw_flag_names[] = {
+ FLAG(DEAUTH_NEED_MGD_TX_PREP),
+ FLAG(DOESNT_SUPPORT_QOS_NDP),
+ FLAG(TX_STATUS_NO_AMPDU_LEN),
++ FLAG(TX_NEEDS_ALIGNED4_SKBS),
+ #undef FLAG
+ };
+
+++ /dev/null
-From: Janusz Dziedzic <janusz.dziedzic@tieto.com>
-Date: Fri, 19 Feb 2016 11:01:49 +0100
-Subject: [PATCH] mac80211: add hdrlen to ieee80211_tx_data
-
-Add hdrlen to ieee80211_tx_data and use this
-when wep/ccmd/tkip. This is preparation for
-aligned4 code.
-
-Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
----
-
---- a/net/mac80211/ieee80211_i.h
-+++ b/net/mac80211/ieee80211_i.h
-@@ -179,6 +179,7 @@ struct ieee80211_tx_data {
- struct ieee80211_tx_rate rate;
-
- unsigned int flags;
-+ unsigned int hdrlen;
- };
-
-
---- a/net/mac80211/tx.c
-+++ b/net/mac80211/tx.c
-@@ -925,7 +925,7 @@ ieee80211_tx_h_fragment(struct ieee80211
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- struct ieee80211_hdr *hdr = (void *)skb->data;
- int frag_threshold = tx->local->hw.wiphy->frag_threshold;
-- int hdrlen;
-+ int hdrlen = tx->hdrlen;
- int fragnum;
-
- /* no matter what happens, tx->skb moves to tx->skbs */
-@@ -946,8 +946,6 @@ ieee80211_tx_h_fragment(struct ieee80211
- if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
- return TX_DROP;
-
-- hdrlen = ieee80211_hdrlen(hdr->frame_control);
--
- /* internal error, why isn't DONTFRAG set? */
- if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
- return TX_DROP;
-@@ -1178,6 +1176,8 @@ ieee80211_tx_prepare(struct ieee80211_su
-
- hdr = (struct ieee80211_hdr *) skb->data;
-
-+ tx->hdrlen = ieee80211_hdrlen(hdr->frame_control);
-+
- if (likely(sta)) {
- if (!IS_ERR(sta))
- tx->sta = sta;
-@@ -3513,6 +3513,7 @@ begin:
- tx.local = local;
- tx.skb = skb;
- tx.sdata = vif_to_sdata(info->control.vif);
-+ tx.hdrlen = ieee80211_padded_hdrlen(hw, hdr->frame_control);
-
- if (txq->sta)
- tx.sta = container_of(txq->sta, struct sta_info, sta);
-@@ -3850,6 +3851,7 @@ ieee80211_build_data_template(struct iee
- hdr = (void *)skb->data;
- tx.sta = sta_info_get(sdata, hdr->addr1);
- tx.skb = skb;
-+ tx.hdrlen = ieee80211_padded_hdrlen(&tx.local->hw, hdr->frame_control);
-
- if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
- rcu_read_unlock();
---- a/net/mac80211/util.c
-+++ b/net/mac80211/util.c
-@@ -1390,6 +1390,7 @@ void ieee80211_send_auth(struct ieee8021
- struct ieee80211_local *local = sdata->local;
- struct sk_buff *skb;
- struct ieee80211_mgmt *mgmt;
-+ unsigned int hdrlen;
- int err;
-
- /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
-@@ -1413,8 +1414,10 @@ void ieee80211_send_auth(struct ieee8021
- skb_put_data(skb, extra, extra_len);
-
- if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
-+ hdrlen = ieee80211_hdrlen(mgmt->frame_control);
- mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
-- err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
-+ err = ieee80211_wep_encrypt(local, skb, hdrlen, key,
-+ key_len, key_idx);
- WARN_ON(err);
- }
-
---- a/net/mac80211/wep.c
-+++ b/net/mac80211/wep.c
-@@ -89,11 +89,11 @@ static void ieee80211_wep_get_iv(struct
-
- static u8 *ieee80211_wep_add_iv(struct ieee80211_local *local,
- struct sk_buff *skb,
-+ unsigned int hdrlen,
- int keylen, int keyidx)
- {
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-- unsigned int hdrlen;
- u8 *newhdr;
-
- hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
-@@ -101,7 +101,6 @@ static u8 *ieee80211_wep_add_iv(struct i
- if (WARN_ON(skb_headroom(skb) < IEEE80211_WEP_IV_LEN))
- return NULL;
-
-- hdrlen = ieee80211_hdrlen(hdr->frame_control);
- newhdr = skb_push(skb, IEEE80211_WEP_IV_LEN);
- memmove(newhdr, newhdr + IEEE80211_WEP_IV_LEN, hdrlen);
-
-@@ -160,6 +159,7 @@ int ieee80211_wep_encrypt_data(struct cr
- */
- int ieee80211_wep_encrypt(struct ieee80211_local *local,
- struct sk_buff *skb,
-+ unsigned int hdrlen,
- const u8 *key, int keylen, int keyidx)
- {
- u8 *iv;
-@@ -169,7 +169,7 @@ int ieee80211_wep_encrypt(struct ieee802
- if (WARN_ON(skb_tailroom(skb) < IEEE80211_WEP_ICV_LEN))
- return -1;
-
-- iv = ieee80211_wep_add_iv(local, skb, keylen, keyidx);
-+ iv = ieee80211_wep_add_iv(local, skb, hdrlen, keylen, keyidx);
- if (!iv)
- return -1;
-
-@@ -307,13 +307,14 @@ static int wep_encrypt_skb(struct ieee80
- struct ieee80211_key_conf *hw_key = info->control.hw_key;
-
- if (!hw_key) {
-- if (ieee80211_wep_encrypt(tx->local, skb, tx->key->conf.key,
-+ if (ieee80211_wep_encrypt(tx->local, skb, tx->hdrlen,
-+ tx->key->conf.key,
- tx->key->conf.keylen,
- tx->key->conf.keyidx))
- return -1;
- } else if ((hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) ||
- (hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) {
-- if (!ieee80211_wep_add_iv(tx->local, skb,
-+ if (!ieee80211_wep_add_iv(tx->local, skb, tx->hdrlen,
- tx->key->conf.keylen,
- tx->key->conf.keyidx))
- return -1;
---- a/net/mac80211/wep.h
-+++ b/net/mac80211/wep.h
-@@ -22,6 +22,7 @@ int ieee80211_wep_encrypt_data(struct cr
- size_t klen, u8 *data, size_t data_len);
- int ieee80211_wep_encrypt(struct ieee80211_local *local,
- struct sk_buff *skb,
-+ unsigned int hdrlen,
- const u8 *key, int keylen, int keyidx);
- int ieee80211_wep_decrypt_data(struct crypto_cipher *tfm, u8 *rc4key,
- size_t klen, u8 *data, size_t data_len);
---- a/net/mac80211/wpa.c
-+++ b/net/mac80211/wpa.c
-@@ -44,7 +44,7 @@ ieee80211_tx_h_michael_mic_add(struct ie
- skb->len < 24 || !ieee80211_is_data_present(hdr->frame_control))
- return TX_CONTINUE;
-
-- hdrlen = ieee80211_hdrlen(hdr->frame_control);
-+ hdrlen = tx->hdrlen;
- if (skb->len < hdrlen)
- return TX_DROP;
-
-@@ -195,7 +195,6 @@ mic_fail_no_key:
-
- static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
- {
-- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
- struct ieee80211_key *key = tx->key;
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- unsigned int hdrlen;
-@@ -210,7 +209,7 @@ static int tkip_encrypt_skb(struct ieee8
- return 0;
- }
-
-- hdrlen = ieee80211_hdrlen(hdr->frame_control);
-+ hdrlen = tx->hdrlen;
- len = skb->len - hdrlen;
-
- if (info->control.hw_key)
-@@ -428,7 +427,7 @@ static int ccmp_encrypt_skb(struct ieee8
- return 0;
- }
-
-- hdrlen = ieee80211_hdrlen(hdr->frame_control);
-+ hdrlen = tx->hdrlen;
- len = skb->len - hdrlen;
-
- if (info->control.hw_key)
-@@ -660,7 +659,7 @@ static int gcmp_encrypt_skb(struct ieee8
- return 0;
- }
-
-- hdrlen = ieee80211_hdrlen(hdr->frame_control);
-+ hdrlen = tx->hdrlen;
- len = skb->len - hdrlen;
-
- if (info->control.hw_key)
-@@ -800,7 +799,6 @@ static ieee80211_tx_result
- ieee80211_crypto_cs_encrypt(struct ieee80211_tx_data *tx,
- struct sk_buff *skb)
- {
-- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
- struct ieee80211_key *key = tx->key;
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- int hdrlen;
-@@ -816,8 +814,7 @@ ieee80211_crypto_cs_encrypt(struct ieee8
- pskb_expand_head(skb, iv_len, 0, GFP_ATOMIC)))
- return TX_DROP;
-
-- hdrlen = ieee80211_hdrlen(hdr->frame_control);
--
-+ hdrlen = tx->hdrlen;
- pos = skb_push(skb, iv_len);
- memmove(pos, pos + iv_len, hdrlen);
-
+++ /dev/null
-From: Janusz Dziedzic <janusz.dziedzic@tieto.com>
-Date: Fri, 19 Feb 2016 11:01:50 +0100
-Subject: [PATCH] mac80211: add NEED_ALIGNED4_SKBS hw flag
-
-HW/driver should set NEED_ALIGNED4_SKBS flag in case
-require aligned skbs to four-byte boundaries.
-This affect only TX direction.
-
-Padding is added after ieee80211_hdr, before IV/LLC.
-
-Before we have to do memmove(hdrlen) twice in the
-dirver. Once before we pass this to HW and next
-in tx completion (to be sure monitor will report
-this tx frame correctly).
-
-With this patch we can skip this memmove() and save CPU.
-
-Currently this was tested with ath9k, both hw/sw crypt for
-wep/tkip/ccmp.
-
-Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
----
-
---- a/include/net/mac80211.h
-+++ b/include/net/mac80211.h
-@@ -2131,6 +2131,9 @@ struct ieee80211_txq {
- * @IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP: The driver (or firmware) doesn't
- * support QoS NDP for AP probing - that's most likely a driver bug.
- *
-+ * @IEEE80211_HW_NEEDS_ALIGNED4_SKBS: Driver need aligned skbs to four-byte.
-+ * Padding will be added after ieee80211_hdr, before IV/LLC.
-+ *
- * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
- */
- enum ieee80211_hw_flags {
-@@ -2176,6 +2179,7 @@ enum ieee80211_hw_flags {
- IEEE80211_HW_SUPPORTS_TDLS_BUFFER_STA,
- IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP,
- IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP,
-+ IEEE80211_HW_NEEDS_ALIGNED4_SKBS,
-
- /* keep last, obviously */
- NUM_IEEE80211_HW_FLAGS
---- a/net/mac80211/debugfs.c
-+++ b/net/mac80211/debugfs.c
-@@ -214,6 +214,7 @@ static const char *hw_flag_names[] = {
- FLAG(SUPPORTS_TDLS_BUFFER_STA),
- FLAG(DEAUTH_NEED_MGD_TX_PREP),
- FLAG(DOESNT_SUPPORT_QOS_NDP),
-+ FLAG(NEEDS_ALIGNED4_SKBS),
- #undef FLAG
- };
-
---- a/net/mac80211/ieee80211_i.h
-+++ b/net/mac80211/ieee80211_i.h
-@@ -1559,6 +1559,29 @@ ieee80211_vif_get_num_mcast_if(struct ie
- return -1;
- }
-
-+static inline unsigned int
-+ieee80211_hdr_padsize(struct ieee80211_hw *hw, unsigned int hdrlen)
-+{
-+ /*
-+ * While hdrlen is already aligned to two-byte boundaries,
-+ * simple check with & 2 will return correct padsize.
-+ */
-+ if (ieee80211_hw_check(hw, NEEDS_ALIGNED4_SKBS))
-+ return hdrlen & 2;
-+ return 0;
-+}
-+
-+static inline unsigned int
-+ieee80211_padded_hdrlen(struct ieee80211_hw *hw, __le16 fc)
-+{
-+ unsigned int hdrlen;
-+
-+ hdrlen = ieee80211_hdrlen(fc);
-+ hdrlen += ieee80211_hdr_padsize(hw, hdrlen);
-+
-+ return hdrlen;
-+}
-+
- u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
- struct ieee80211_rx_status *status,
- unsigned int mpdu_len,
---- a/net/mac80211/sta_info.h
-+++ b/net/mac80211/sta_info.h
-@@ -301,7 +301,7 @@ struct ieee80211_fast_tx {
- u8 hdr_len;
- u8 sa_offs, da_offs, pn_offs;
- u8 band;
-- u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
-+ u8 hdr[30 + 2 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
- sizeof(rfc1042_header)] __aligned(2);
-
- struct rcu_head rcu_head;
---- a/net/mac80211/status.c
-+++ b/net/mac80211/status.c
-@@ -655,9 +655,22 @@ void ieee80211_tx_monitor(struct ieee802
- struct sk_buff *skb2;
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- struct ieee80211_sub_if_data *sdata;
-+ struct ieee80211_hdr *hdr = (void *)skb->data;
- struct net_device *prev_dev = NULL;
-+ unsigned int hdrlen, padsize;
- int rtap_len;
-
-+ /* Remove padding if was added */
-+ if (ieee80211_hw_check(&local->hw, NEEDS_ALIGNED4_SKBS)) {
-+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
-+ padsize = ieee80211_hdr_padsize(&local->hw, hdrlen);
-+
-+ if (padsize && skb->len > hdrlen + padsize) {
-+ memmove(skb->data + padsize, skb->data, hdrlen);
-+ skb_pull(skb, padsize);
-+ }
-+ }
-+
- /* send frame to monitor interfaces now */
- rtap_len = ieee80211_tx_radiotap_len(info);
- if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
---- a/net/mac80211/tkip.c
-+++ b/net/mac80211/tkip.c
-@@ -201,10 +201,12 @@ void ieee80211_get_tkip_p2k(struct ieee8
- {
- struct ieee80211_key *key = (struct ieee80211_key *)
- container_of(keyconf, struct ieee80211_key, conf);
-+ struct ieee80211_hw *hw = &key->local->hw;
- const u8 *tk = &key->conf.key[NL80211_TKIP_DATA_OFFSET_ENCR_KEY];
- struct tkip_ctx *ctx = &key->u.tkip.tx;
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-- const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
-+ const u8 *data = (u8 *)hdr + ieee80211_padded_hdrlen(hw,
-+ hdr->frame_control);
- u32 iv32 = get_unaligned_le32(&data[4]);
- u16 iv16 = data[2] | (data[0] << 8);
-
---- a/net/mac80211/tx.c
-+++ b/net/mac80211/tx.c
-@@ -1175,8 +1175,7 @@ ieee80211_tx_prepare(struct ieee80211_su
- info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
-
- hdr = (struct ieee80211_hdr *) skb->data;
--
-- tx->hdrlen = ieee80211_hdrlen(hdr->frame_control);
-+ tx->hdrlen = ieee80211_padded_hdrlen(&local->hw, hdr->frame_control);
-
- if (likely(sta)) {
- if (!IS_ERR(sta))
-@@ -2215,7 +2214,7 @@ netdev_tx_t ieee80211_monitor_start_xmit
- goto fail;
-
- hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
-- hdrlen = ieee80211_hdrlen(hdr->frame_control);
-+ hdrlen = ieee80211_padded_hdrlen(&local->hw, hdr->frame_control);
-
- if (skb->len < len_rthdr + hdrlen)
- goto fail;
-@@ -2433,7 +2432,7 @@ static struct sk_buff *ieee80211_build_h
- struct ieee80211_chanctx_conf *chanctx_conf;
- struct ieee80211_sub_if_data *ap_sdata;
- enum nl80211_band band;
-- int ret;
-+ int padsize, ret;
-
- if (IS_ERR(sta))
- sta = NULL;
-@@ -2653,6 +2652,9 @@ static struct sk_buff *ieee80211_build_h
- hdrlen += 2;
- }
-
-+ /* Check aligned4 skb required */
-+ padsize = ieee80211_hdr_padsize(&sdata->local->hw, hdrlen);
-+
- /*
- * Drop unicast frames to unauthorised stations unless they are
- * EAPOL frames from the local station.
-@@ -2733,6 +2735,7 @@ static struct sk_buff *ieee80211_build_h
-
- skb_pull(skb, skip_header_bytes);
- head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
-+ head_need += padsize;
-
- /*
- * So we need to modify the skb header and hence need a copy of
-@@ -2765,6 +2768,9 @@ static struct sk_buff *ieee80211_build_h
- memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
- #endif
-
-+ if (padsize)
-+ memset(skb_push(skb, padsize), 0, padsize);
-+
- if (ieee80211_is_data_qos(fc)) {
- __le16 *qos_control;
-
-@@ -2940,6 +2946,9 @@ void ieee80211_check_fast_xmit(struct st
- fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
- }
-
-+ /* Check aligned4 skb required */
-+ build.hdr_len += ieee80211_hdr_padsize(&local->hw, build.hdr_len);
-+
- /* We store the key here so there's no point in using rcu_dereference()
- * but that's fine because the code that changes the pointers will call
- * this function after doing so. For a single CPU that would be enough,
-@@ -3540,7 +3549,7 @@ begin:
-
- if (tx.key &&
- (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
-- pn_offs = ieee80211_hdrlen(hdr->frame_control);
-+ pn_offs = tx.hdrlen;
-
- ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
- tx.key, skb);
---- a/net/mac80211/util.c
-+++ b/net/mac80211/util.c
-@@ -1388,6 +1388,7 @@ void ieee80211_send_auth(struct ieee8021
- u32 tx_flags)
- {
- struct ieee80211_local *local = sdata->local;
-+ struct ieee80211_hw *hw = &local->hw;
- struct sk_buff *skb;
- struct ieee80211_mgmt *mgmt;
- unsigned int hdrlen;
-@@ -1414,7 +1415,7 @@ void ieee80211_send_auth(struct ieee8021
- skb_put_data(skb, extra, extra_len);
-
- if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
-- hdrlen = ieee80211_hdrlen(mgmt->frame_control);
-+ hdrlen = ieee80211_padded_hdrlen(hw, mgmt->frame_control);
- mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
- err = ieee80211_wep_encrypt(local, skb, hdrlen, key,
- key_len, key_idx);
+++ /dev/null
-From: Chaitanya T K <chaitanya.mgit@gmail.com>
-Date: Mon, 27 Jun 2016 15:23:26 +0530
-Subject: [PATCH] mac80211: minstrel: Enable STBC and LDPC for VHT Rates
-
-If peer support reception of STBC and LDPC, enable them for better
-performance.
-
-Signed-off-by: Chaitanya TK <chaitanya.mgit@gmail.com>
----
-
---- a/include/linux/ieee80211.h
-+++ b/include/linux/ieee80211.h
-@@ -1659,6 +1659,7 @@ struct ieee80211_mu_edca_param_set {
- #define IEEE80211_VHT_CAP_RXSTBC_3 0x00000300
- #define IEEE80211_VHT_CAP_RXSTBC_4 0x00000400
- #define IEEE80211_VHT_CAP_RXSTBC_MASK 0x00000700
-+#define IEEE80211_VHT_CAP_RXSTBC_SHIFT 8
- #define IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE 0x00000800
- #define IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE 0x00001000
- #define IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT 13
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -1130,7 +1130,7 @@ minstrel_ht_update_caps(void *priv, stru
- struct minstrel_ht_sta_priv *msp = priv_sta;
- struct minstrel_ht_sta *mi = &msp->ht;
- struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
-- u16 sta_cap = sta->ht_cap.cap;
-+ u16 ht_cap = sta->ht_cap.cap;
- struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
- struct sta_info *sinfo = container_of(sta, struct sta_info, sta);
- int use_vht;
-@@ -1138,6 +1138,7 @@ minstrel_ht_update_caps(void *priv, stru
- int ack_dur;
- int stbc;
- int i;
-+ bool ldpc = false;
-
- /* fall back to the old minstrel for legacy stations */
- if (!sta->ht_cap.ht_supported)
-@@ -1175,16 +1176,24 @@ minstrel_ht_update_caps(void *priv, stru
- }
- mi->sample_tries = 4;
-
-- /* TODO tx_flags for vht - ATM the RC API is not fine-grained enough */
- if (!use_vht) {
-- stbc = (sta_cap & IEEE80211_HT_CAP_RX_STBC) >>
-+ stbc = (ht_cap & IEEE80211_HT_CAP_RX_STBC) >>
- IEEE80211_HT_CAP_RX_STBC_SHIFT;
-- mi->tx_flags |= stbc << IEEE80211_TX_CTL_STBC_SHIFT;
-
-- if (sta_cap & IEEE80211_HT_CAP_LDPC_CODING)
-- mi->tx_flags |= IEEE80211_TX_CTL_LDPC;
-+ if (ht_cap & IEEE80211_HT_CAP_LDPC_CODING)
-+ ldpc = true;
-+ } else {
-+ stbc = (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK) >>
-+ IEEE80211_VHT_CAP_RXSTBC_SHIFT;
-+
-+ if (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)
-+ ldpc = true;
- }
-
-+ mi->tx_flags |= stbc << IEEE80211_TX_CTL_STBC_SHIFT;
-+ if (ldpc)
-+ mi->tx_flags |= IEEE80211_TX_CTL_LDPC;
-+
- for (i = 0; i < ARRAY_SIZE(mi->groups); i++) {
- u32 gflags = minstrel_mcs_groups[i].flags;
- int bw, nss;
-@@ -1197,10 +1206,10 @@ minstrel_ht_update_caps(void *priv, stru
-
- if (gflags & IEEE80211_TX_RC_SHORT_GI) {
- if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
-- if (!(sta_cap & IEEE80211_HT_CAP_SGI_40))
-+ if (!(ht_cap & IEEE80211_HT_CAP_SGI_40))
- continue;
- } else {
-- if (!(sta_cap & IEEE80211_HT_CAP_SGI_20))
-+ if (!(ht_cap & IEEE80211_HT_CAP_SGI_20))
- continue;
- }
- }
+++ /dev/null
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sat, 10 Feb 2018 12:41:51 +0100
-Subject: [PATCH] mac80211: minstrel: remove unnecessary debugfs cleanup
- code
-
-debugfs entries are cleaned up by debugfs_remove_recursive already.
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/net/mac80211/rc80211_minstrel.c
-+++ b/net/mac80211/rc80211_minstrel.c
-@@ -689,8 +689,8 @@ minstrel_alloc(struct ieee80211_hw *hw,
-
- #ifdef CPTCFG_MAC80211_DEBUGFS
- mp->fixed_rate_idx = (u32) -1;
-- mp->dbg_fixed_rate = debugfs_create_u32("fixed_rate_idx",
-- 0666, debugfsdir, &mp->fixed_rate_idx);
-+ debugfs_create_u32("fixed_rate_idx", S_IRUGO | S_IWUGO, debugfsdir,
-+ &mp->fixed_rate_idx);
- #endif
-
- minstrel_init_cck_rates(mp);
-@@ -701,9 +701,6 @@ minstrel_alloc(struct ieee80211_hw *hw,
- static void
- minstrel_free(void *priv)
- {
--#ifdef CPTCFG_MAC80211_DEBUGFS
-- debugfs_remove(((struct minstrel_priv *)priv)->dbg_fixed_rate);
--#endif
- kfree(priv);
- }
-
-@@ -735,7 +732,6 @@ const struct rate_control_ops mac80211_m
- .free_sta = minstrel_free_sta,
- #ifdef CPTCFG_MAC80211_DEBUGFS
- .add_sta_debugfs = minstrel_add_sta_debugfs,
-- .remove_sta_debugfs = minstrel_remove_sta_debugfs,
- #endif
- .get_expected_throughput = minstrel_get_expected_throughput,
- };
---- a/net/mac80211/rc80211_minstrel.h
-+++ b/net/mac80211/rc80211_minstrel.h
-@@ -109,11 +109,6 @@ struct minstrel_sta_info {
-
- /* sampling table */
- u8 *sample_table;
--
--#ifdef CPTCFG_MAC80211_DEBUGFS
-- struct dentry *dbg_stats;
-- struct dentry *dbg_stats_csv;
--#endif
- };
-
- struct minstrel_priv {
-@@ -137,7 +132,6 @@ struct minstrel_priv {
- * - setting will be applied on next update
- */
- u32 fixed_rate_idx;
-- struct dentry *dbg_fixed_rate;
- #endif
- };
-
-@@ -156,7 +150,6 @@ minstrel_get_ewmsd10(struct minstrel_rat
-
- extern const 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);
-
- /* Recalculate success probabilities and counters for a given rate using EWMA */
- void minstrel_calc_rate_stats(struct minstrel_rate_stats *mrs);
---- a/net/mac80211/rc80211_minstrel_debugfs.c
-+++ b/net/mac80211/rc80211_minstrel_debugfs.c
-@@ -214,19 +214,7 @@ minstrel_add_sta_debugfs(void *priv, voi
- {
- struct minstrel_sta_info *mi = priv_sta;
-
-- mi->dbg_stats = debugfs_create_file("rc_stats", 0444, dir, mi,
-- &minstrel_stat_fops);
--
-- mi->dbg_stats_csv = debugfs_create_file("rc_stats_csv", 0444, dir, mi,
-- &minstrel_stat_csv_fops);
--}
--
--void
--minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
--{
-- struct minstrel_sta_info *mi = priv_sta;
--
-- debugfs_remove(mi->dbg_stats);
--
-- debugfs_remove(mi->dbg_stats_csv);
-+ debugfs_create_file("rc_stats", S_IRUGO, dir, mi, &minstrel_stat_fops);
-+ debugfs_create_file("rc_stats_csv", S_IRUGO, dir, mi,
-+ &minstrel_stat_csv_fops);
- }
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -1393,7 +1393,6 @@ static const struct rate_control_ops mac
- .free = minstrel_ht_free,
- #ifdef CPTCFG_MAC80211_DEBUGFS
- .add_sta_debugfs = minstrel_ht_add_sta_debugfs,
-- .remove_sta_debugfs = minstrel_ht_remove_sta_debugfs,
- #endif
- .get_expected_throughput = minstrel_ht_get_expected_throughput,
- };
---- a/net/mac80211/rc80211_minstrel_ht.h
-+++ b/net/mac80211/rc80211_minstrel_ht.h
-@@ -110,17 +110,12 @@ struct minstrel_ht_sta_priv {
- struct minstrel_ht_sta ht;
- struct minstrel_sta_info legacy;
- };
--#ifdef CPTCFG_MAC80211_DEBUGFS
-- struct dentry *dbg_stats;
-- struct dentry *dbg_stats_csv;
--#endif
- void *ratelist;
- void *sample_table;
- bool is_ht;
- };
-
- void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
--void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);
- int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
- int prob_ewma);
-
---- a/net/mac80211/rc80211_minstrel_ht_debugfs.c
-+++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
-@@ -303,17 +303,8 @@ minstrel_ht_add_sta_debugfs(void *priv,
- {
- struct minstrel_ht_sta_priv *msp = priv_sta;
-
-- msp->dbg_stats = debugfs_create_file("rc_stats", 0444, dir, msp,
-- &minstrel_ht_stat_fops);
-- msp->dbg_stats_csv = debugfs_create_file("rc_stats_csv", 0444, dir, msp,
-- &minstrel_ht_stat_csv_fops);
--}
--
--void
--minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
--{
-- struct minstrel_ht_sta_priv *msp = priv_sta;
--
-- debugfs_remove(msp->dbg_stats);
-- debugfs_remove(msp->dbg_stats_csv);
-+ debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
-+ &minstrel_ht_stat_fops);
-+ debugfs_create_file("rc_stats_csv", S_IRUGO, dir, msp,
-+ &minstrel_ht_stat_csv_fops);
- }
+++ /dev/null
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sat, 10 Feb 2018 12:43:30 +0100
-Subject: [PATCH] mac80211: minstrel: merge with minstrel_ht, always enable
- VHT support
-
-Legacy-only devices are not very common and the overhead of the extra
-code for HT and VHT rates is not big enough to justify all those extra
-lines of code to make it optional.
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/net/mac80211/Kconfig
-+++ b/net/mac80211/Kconfig
-@@ -25,20 +25,6 @@ config MAC80211_RC_MINSTREL
- ---help---
- This option enables the 'minstrel' TX rate control algorithm
-
--config MAC80211_RC_MINSTREL_HT
-- bool "Minstrel 802.11n support" if EXPERT
-- depends on MAC80211_RC_MINSTREL
-- default y
-- ---help---
-- This option enables the 'minstrel_ht' TX rate control algorithm
--
--config MAC80211_RC_MINSTREL_VHT
-- bool "Minstrel 802.11ac support" if EXPERT
-- depends on MAC80211_RC_MINSTREL_HT
-- default n
-- ---help---
-- This option enables VHT in the 'minstrel_ht' TX rate control algorithm
--
- choice
- prompt "Default rate control algorithm"
- depends on MAC80211_HAS_RC
-@@ -60,8 +46,7 @@ endchoice
-
- config MAC80211_RC_DEFAULT
- string
-- default "minstrel_ht" if MAC80211_RC_DEFAULT_MINSTREL && MAC80211_RC_MINSTREL_HT
-- default "minstrel" if MAC80211_RC_DEFAULT_MINSTREL
-+ default "minstrel_ht" if MAC80211_RC_DEFAULT_MINSTREL
- default ""
-
- endif
---- a/net/mac80211/Makefile
-+++ b/net/mac80211/Makefile
-@@ -52,13 +52,14 @@ mac80211-$(CONFIG_PM) += pm.o
-
- CFLAGS_trace.o := -I$(src)
-
--rc80211_minstrel-y := rc80211_minstrel.o
--rc80211_minstrel-$(CPTCFG_MAC80211_DEBUGFS) += rc80211_minstrel_debugfs.o
-+rc80211_minstrel-y := \
-+ rc80211_minstrel.o \
-+ rc80211_minstrel_ht.o
-
--rc80211_minstrel_ht-y := rc80211_minstrel_ht.o
--rc80211_minstrel_ht-$(CPTCFG_MAC80211_DEBUGFS) += rc80211_minstrel_ht_debugfs.o
-+rc80211_minstrel-$(CPTCFG_MAC80211_DEBUGFS) += \
-+ rc80211_minstrel_debugfs.o \
-+ rc80211_minstrel_ht_debugfs.o
-
- mac80211-$(CPTCFG_MAC80211_RC_MINSTREL) += $(rc80211_minstrel-y)
--mac80211-$(CPTCFG_MAC80211_RC_MINSTREL_HT) += $(rc80211_minstrel_ht-y)
-
- ccflags-y += -DDEBUG
---- a/net/mac80211/main.c
-+++ b/net/mac80211/main.c
-@@ -1308,18 +1308,12 @@ static int __init ieee80211_init(void)
- if (ret)
- return ret;
-
-- ret = rc80211_minstrel_ht_init();
-- if (ret)
-- goto err_minstrel;
--
- ret = ieee80211_iface_init();
- if (ret)
- goto err_netdev;
-
- return 0;
- err_netdev:
-- rc80211_minstrel_ht_exit();
-- err_minstrel:
- rc80211_minstrel_exit();
-
- return ret;
-@@ -1327,7 +1321,6 @@ static int __init ieee80211_init(void)
-
- static void __exit ieee80211_exit(void)
- {
-- rc80211_minstrel_ht_exit();
- rc80211_minstrel_exit();
-
- ieee80211s_stop();
---- a/net/mac80211/rate.h
-+++ b/net/mac80211/rate.h
-@@ -95,18 +95,5 @@ static inline void rc80211_minstrel_exit
- }
- #endif
-
--#ifdef CPTCFG_MAC80211_RC_MINSTREL_HT
--int rc80211_minstrel_ht_init(void);
--void rc80211_minstrel_ht_exit(void);
--#else
--static inline int rc80211_minstrel_ht_init(void)
--{
-- return 0;
--}
--static inline void rc80211_minstrel_ht_exit(void)
--{
--}
--#endif
--
-
- #endif /* IEEE80211_RATE_H */
---- a/net/mac80211/rc80211_minstrel.c
-+++ b/net/mac80211/rc80211_minstrel.c
-@@ -572,138 +572,6 @@ minstrel_rate_init(void *priv, struct ie
- minstrel_update_rates(mp, 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 < NUM_NL80211_BANDS; i++) {
-- sband = hw->wiphy->bands[i];
-- if (sband && sband->n_bitrates > max_rates)
-- max_rates = sband->n_bitrates;
-- }
--
-- mi->r = kcalloc(max_rates, sizeof(struct minstrel_rate), gfp);
-- if (!mi->r)
-- goto error;
--
-- mi->sample_table = kmalloc_array(max_rates, SAMPLE_COLUMNS, gfp);
-- if (!mi->sample_table)
-- goto error1;
--
-- mi->last_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_init_cck_rates(struct minstrel_priv *mp)
--{
-- static const int bitrates[4] = { 10, 20, 55, 110 };
-- struct ieee80211_supported_band *sband;
-- u32 rate_flags = ieee80211_chandef_rate_flags(&mp->hw->conf.chandef);
-- int i, j;
--
-- sband = mp->hw->wiphy->bands[NL80211_BAND_2GHZ];
-- if (!sband)
-- return;
--
-- for (i = 0, j = 0; i < sband->n_bitrates; i++) {
-- struct ieee80211_rate *rate = &sband->bitrates[i];
--
-- if (rate->flags & IEEE80211_RATE_ERP_G)
-- continue;
--
-- if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
-- continue;
--
-- for (j = 0; j < ARRAY_SIZE(bitrates); j++) {
-- if (rate->bitrate != bitrates[j])
-- continue;
--
-- mp->cck_rates[j] = i;
-- break;
-- }
-- }
--}
--
--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;
--
-- /* maximum time that the hw is allowed to stay in one MRR segment */
-- mp->segment_size = 6000;
--
-- if (hw->max_rate_tries > 0)
-- mp->max_retry = hw->max_rate_tries;
-- else
-- /* safe default, does not necessarily have to match hw properties */
-- mp->max_retry = 7;
--
-- if (hw->max_rates >= 4)
-- mp->has_mrr = true;
--
-- mp->hw = hw;
-- mp->update_interval = 100;
--
--#ifdef CPTCFG_MAC80211_DEBUGFS
-- mp->fixed_rate_idx = (u32) -1;
-- debugfs_create_u32("fixed_rate_idx", S_IRUGO | S_IWUGO, debugfsdir,
-- &mp->fixed_rate_idx);
--#endif
--
-- minstrel_init_cck_rates(mp);
--
-- return mp;
--}
--
--static void
--minstrel_free(void *priv)
--{
-- kfree(priv);
--}
--
- static u32 minstrel_get_expected_throughput(void *priv_sta)
- {
- struct minstrel_sta_info *mi = priv_sta;
-@@ -722,28 +590,8 @@ static u32 minstrel_get_expected_through
- }
-
- const struct rate_control_ops mac80211_minstrel = {
-- .name = "minstrel",
- .tx_status_ext = minstrel_tx_status,
- .get_rate = minstrel_get_rate,
- .rate_init = minstrel_rate_init,
-- .alloc = minstrel_alloc,
-- .free = minstrel_free,
-- .alloc_sta = minstrel_alloc_sta,
-- .free_sta = minstrel_free_sta,
--#ifdef CPTCFG_MAC80211_DEBUGFS
-- .add_sta_debugfs = minstrel_add_sta_debugfs,
--#endif
- .get_expected_throughput = minstrel_get_expected_throughput,
- };
--
--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/rc80211_minstrel.h
-+++ b/net/mac80211/rc80211_minstrel.h
-@@ -158,7 +158,5 @@ int minstrel_get_tp_avg(struct minstrel_
- /* debugfs */
- int minstrel_stats_open(struct inode *inode, struct file *file);
- int minstrel_stats_csv_open(struct inode *inode, struct file *file);
--ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos);
--int minstrel_stats_release(struct inode *inode, struct file *file);
-
- #endif
---- a/net/mac80211/rc80211_minstrel_debugfs.c
-+++ b/net/mac80211/rc80211_minstrel_debugfs.c
-@@ -54,22 +54,6 @@
- #include <net/mac80211.h>
- #include "rc80211_minstrel.h"
-
--ssize_t
--minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
--{
-- struct minstrel_debugfs_info *ms;
--
-- ms = file->private_data;
-- return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
--}
--
--int
--minstrel_stats_release(struct inode *inode, struct file *file)
--{
-- kfree(file->private_data);
-- return 0;
--}
--
- int
- minstrel_stats_open(struct inode *inode, struct file *file)
- {
-@@ -135,14 +119,6 @@ minstrel_stats_open(struct inode *inode,
- return 0;
- }
-
--static const struct file_operations minstrel_stat_fops = {
-- .owner = THIS_MODULE,
-- .open = minstrel_stats_open,
-- .read = minstrel_stats_read,
-- .release = minstrel_stats_release,
-- .llseek = default_llseek,
--};
--
- int
- minstrel_stats_csv_open(struct inode *inode, struct file *file)
- {
-@@ -200,21 +176,3 @@ minstrel_stats_csv_open(struct inode *in
-
- return 0;
- }
--
--static const struct file_operations minstrel_stat_csv_fops = {
-- .owner = THIS_MODULE,
-- .open = minstrel_stats_csv_open,
-- .read = minstrel_stats_read,
-- .release = minstrel_stats_release,
-- .llseek = default_llseek,
--};
--
--void
--minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
--{
-- struct minstrel_sta_info *mi = priv_sta;
--
-- debugfs_create_file("rc_stats", S_IRUGO, dir, mi, &minstrel_stat_fops);
-- debugfs_create_file("rc_stats_csv", S_IRUGO, dir, mi,
-- &minstrel_stat_csv_fops);
--}
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -137,12 +137,10 @@
- } \
- }
-
--#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
- static bool minstrel_vht_only = true;
- module_param(minstrel_vht_only, bool, 0644);
- MODULE_PARM_DESC(minstrel_vht_only,
- "Use only VHT rates when VHT is supported by sta.");
--#endif
-
- /*
- * To enable sufficiently targeted rate sampling, MCS rates are divided into
-@@ -171,7 +169,6 @@ const struct mcs_group minstrel_mcs_grou
-
- CCK_GROUP,
-
--#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
- VHT_GROUP(1, 0, BW_20),
- VHT_GROUP(2, 0, BW_20),
- VHT_GROUP(3, 0, BW_20),
-@@ -195,7 +192,6 @@ const struct mcs_group minstrel_mcs_grou
- VHT_GROUP(1, 1, BW_80),
- VHT_GROUP(2, 1, BW_80),
- VHT_GROUP(3, 1, BW_80),
--#endif
- };
-
- static u8 sample_table[SAMPLE_COLUMNS][MCS_GROUP_RATES] __read_mostly;
-@@ -1146,12 +1142,10 @@ minstrel_ht_update_caps(void *priv, stru
-
- BUILD_BUG_ON(ARRAY_SIZE(minstrel_mcs_groups) != MINSTREL_GROUPS_NB);
-
--#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
- if (vht_cap->vht_supported)
- use_vht = vht_cap->vht_mcs.tx_mcs_map != cpu_to_le16(~0);
- else
--#endif
-- use_vht = 0;
-+ use_vht = 0;
-
- msp->is_ht = true;
- memset(mi, 0, sizeof(*mi));
-@@ -1226,10 +1220,9 @@ minstrel_ht_update_caps(void *priv, stru
-
- /* HT rate */
- if (gflags & IEEE80211_TX_RC_MCS) {
--#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
- if (use_vht && minstrel_vht_only)
- continue;
--#endif
-+
- mi->supported[i] = mcs->rx_mask[nss - 1];
- if (mi->supported[i])
- n_supported++;
-@@ -1349,16 +1342,88 @@ minstrel_ht_free_sta(void *priv, struct
- kfree(msp);
- }
-
-+static void
-+minstrel_ht_init_cck_rates(struct minstrel_priv *mp)
-+{
-+ static const int bitrates[4] = { 10, 20, 55, 110 };
-+ struct ieee80211_supported_band *sband;
-+ u32 rate_flags = ieee80211_chandef_rate_flags(&mp->hw->conf.chandef);
-+ int i, j;
-+
-+ sband = mp->hw->wiphy->bands[NL80211_BAND_2GHZ];
-+ if (!sband)
-+ return;
-+
-+ for (i = 0, j = 0; i < sband->n_bitrates; i++) {
-+ struct ieee80211_rate *rate = &sband->bitrates[i];
-+
-+ if (rate->flags & IEEE80211_RATE_ERP_G)
-+ continue;
-+
-+ if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
-+ continue;
-+
-+ for (j = 0; j < ARRAY_SIZE(bitrates); j++) {
-+ if (rate->bitrate != bitrates[j])
-+ continue;
-+
-+ mp->cck_rates[j] = i;
-+ break;
-+ }
-+ }
-+}
-+
- static void *
- minstrel_ht_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
- {
-- return mac80211_minstrel.alloc(hw, 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;
-+
-+ /* maximum time that the hw is allowed to stay in one MRR segment */
-+ mp->segment_size = 6000;
-+
-+ if (hw->max_rate_tries > 0)
-+ mp->max_retry = hw->max_rate_tries;
-+ else
-+ /* safe default, does not necessarily have to match hw properties */
-+ mp->max_retry = 7;
-+
-+ if (hw->max_rates >= 4)
-+ mp->has_mrr = true;
-+
-+ mp->hw = hw;
-+ mp->update_interval = 100;
-+
-+#ifdef CPTCFG_MAC80211_DEBUGFS
-+ mp->fixed_rate_idx = (u32) -1;
-+ debugfs_create_u32("fixed_rate_idx", S_IRUGO | S_IWUGO, debugfsdir,
-+ &mp->fixed_rate_idx);
-+#endif
-+
-+ minstrel_ht_init_cck_rates(mp);
-+
-+ return mp;
- }
-
- static void
- minstrel_ht_free(void *priv)
- {
-- mac80211_minstrel.free(priv);
-+ kfree(priv);
- }
-
- static u32 minstrel_ht_get_expected_throughput(void *priv_sta)
-@@ -1417,14 +1482,14 @@ static void __init init_sample_table(voi
- }
-
- int __init
--rc80211_minstrel_ht_init(void)
-+rc80211_minstrel_init(void)
- {
- init_sample_table();
- return ieee80211_rate_control_register(&mac80211_minstrel_ht);
- }
-
- void
--rc80211_minstrel_ht_exit(void)
-+rc80211_minstrel_exit(void)
- {
- ieee80211_rate_control_unregister(&mac80211_minstrel_ht);
- }
---- a/net/mac80211/rc80211_minstrel_ht.h
-+++ b/net/mac80211/rc80211_minstrel_ht.h
-@@ -15,11 +15,7 @@
- */
- #define MINSTREL_MAX_STREAMS 3
- #define MINSTREL_HT_STREAM_GROUPS 4 /* BW(=2) * SGI(=2) */
--#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
- #define MINSTREL_VHT_STREAM_GROUPS 6 /* BW(=3) * SGI(=2) */
--#else
--#define MINSTREL_VHT_STREAM_GROUPS 0
--#endif
-
- #define MINSTREL_HT_GROUPS_NB (MINSTREL_MAX_STREAMS * \
- MINSTREL_HT_STREAM_GROUPS)
-@@ -34,11 +30,7 @@
- #define MINSTREL_CCK_GROUP (MINSTREL_HT_GROUP_0 + MINSTREL_HT_GROUPS_NB)
- #define MINSTREL_VHT_GROUP_0 (MINSTREL_CCK_GROUP + 1)
-
--#ifdef CPTCFG_MAC80211_RC_MINSTREL_VHT
- #define MCS_GROUP_RATES 10
--#else
--#define MCS_GROUP_RATES 8
--#endif
-
- struct mcs_group {
- u32 flags;
---- a/net/mac80211/rc80211_minstrel_ht_debugfs.c
-+++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
-@@ -15,6 +15,22 @@
- #include "rc80211_minstrel.h"
- #include "rc80211_minstrel_ht.h"
-
-+static ssize_t
-+minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
-+{
-+ struct minstrel_debugfs_info *ms;
-+
-+ ms = file->private_data;
-+ return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
-+}
-+
-+static int
-+minstrel_stats_release(struct inode *inode, struct file *file)
-+{
-+ kfree(file->private_data);
-+ return 0;
-+}
-+
- static char *
- minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
- {
+++ /dev/null
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sat, 10 Feb 2018 12:45:47 +0100
-Subject: [PATCH] mac80211: minstrel: reduce minstrel_mcs_groups size
-
-By storing a shift value for all duration values of a group, we can
-reduce precision by a neglegible amount to make it fit into a u16 value.
-This improves cache footprint and reduces size:
-
-Before:
- text data bss dec hex filename
- 10024 116 0 10140 279c rc80211_minstrel_ht.o
-
-After:
- text data bss dec hex filename
- 9368 116 0 9484 250c rc80211_minstrel_ht.o
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -52,22 +52,23 @@
- _streams - 1
-
- /* MCS rate information for an MCS group */
--#define MCS_GROUP(_streams, _sgi, _ht40) \
-+#define MCS_GROUP(_streams, _sgi, _ht40, _s) \
- [GROUP_IDX(_streams, _sgi, _ht40)] = { \
- .streams = _streams, \
-+ .shift = _s, \
- .flags = \
- IEEE80211_TX_RC_MCS | \
- (_sgi ? IEEE80211_TX_RC_SHORT_GI : 0) | \
- (_ht40 ? IEEE80211_TX_RC_40_MHZ_WIDTH : 0), \
- .duration = { \
-- MCS_DURATION(_streams, _sgi, _ht40 ? 54 : 26), \
-- MCS_DURATION(_streams, _sgi, _ht40 ? 108 : 52), \
-- MCS_DURATION(_streams, _sgi, _ht40 ? 162 : 78), \
-- MCS_DURATION(_streams, _sgi, _ht40 ? 216 : 104), \
-- MCS_DURATION(_streams, _sgi, _ht40 ? 324 : 156), \
-- MCS_DURATION(_streams, _sgi, _ht40 ? 432 : 208), \
-- MCS_DURATION(_streams, _sgi, _ht40 ? 486 : 234), \
-- MCS_DURATION(_streams, _sgi, _ht40 ? 540 : 260) \
-+ MCS_DURATION(_streams, _sgi, _ht40 ? 54 : 26) >> _s, \
-+ MCS_DURATION(_streams, _sgi, _ht40 ? 108 : 52) >> _s, \
-+ MCS_DURATION(_streams, _sgi, _ht40 ? 162 : 78) >> _s, \
-+ MCS_DURATION(_streams, _sgi, _ht40 ? 216 : 104) >> _s, \
-+ MCS_DURATION(_streams, _sgi, _ht40 ? 324 : 156) >> _s, \
-+ MCS_DURATION(_streams, _sgi, _ht40 ? 432 : 208) >> _s, \
-+ MCS_DURATION(_streams, _sgi, _ht40 ? 486 : 234) >> _s, \
-+ MCS_DURATION(_streams, _sgi, _ht40 ? 540 : 260) >> _s \
- } \
- }
-
-@@ -80,9 +81,10 @@
- #define BW2VBPS(_bw, r3, r2, r1) \
- (_bw == BW_80 ? r3 : _bw == BW_40 ? r2 : r1)
-
--#define VHT_GROUP(_streams, _sgi, _bw) \
-+#define VHT_GROUP(_streams, _sgi, _bw, _s) \
- [VHT_GROUP_IDX(_streams, _sgi, _bw)] = { \
- .streams = _streams, \
-+ .shift = _s, \
- .flags = \
- IEEE80211_TX_RC_VHT_MCS | \
- (_sgi ? IEEE80211_TX_RC_SHORT_GI : 0) | \
-@@ -90,25 +92,25 @@
- _bw == BW_40 ? IEEE80211_TX_RC_40_MHZ_WIDTH : 0), \
- .duration = { \
- MCS_DURATION(_streams, _sgi, \
-- BW2VBPS(_bw, 117, 54, 26)), \
-+ BW2VBPS(_bw, 117, 54, 26)) >> _s, \
- MCS_DURATION(_streams, _sgi, \
-- BW2VBPS(_bw, 234, 108, 52)), \
-+ BW2VBPS(_bw, 234, 108, 52)) >> _s, \
- MCS_DURATION(_streams, _sgi, \
-- BW2VBPS(_bw, 351, 162, 78)), \
-+ BW2VBPS(_bw, 351, 162, 78)) >> _s, \
- MCS_DURATION(_streams, _sgi, \
-- BW2VBPS(_bw, 468, 216, 104)), \
-+ BW2VBPS(_bw, 468, 216, 104)) >> _s, \
- MCS_DURATION(_streams, _sgi, \
-- BW2VBPS(_bw, 702, 324, 156)), \
-+ BW2VBPS(_bw, 702, 324, 156)) >> _s, \
- MCS_DURATION(_streams, _sgi, \
-- BW2VBPS(_bw, 936, 432, 208)), \
-+ BW2VBPS(_bw, 936, 432, 208)) >> _s, \
- MCS_DURATION(_streams, _sgi, \
-- BW2VBPS(_bw, 1053, 486, 234)), \
-+ BW2VBPS(_bw, 1053, 486, 234)) >> _s, \
- MCS_DURATION(_streams, _sgi, \
-- BW2VBPS(_bw, 1170, 540, 260)), \
-+ BW2VBPS(_bw, 1170, 540, 260)) >> _s, \
- MCS_DURATION(_streams, _sgi, \
-- BW2VBPS(_bw, 1404, 648, 312)), \
-+ BW2VBPS(_bw, 1404, 648, 312)) >> _s, \
- MCS_DURATION(_streams, _sgi, \
-- BW2VBPS(_bw, 1560, 720, 346)) \
-+ BW2VBPS(_bw, 1560, 720, 346)) >> _s \
- } \
- }
-
-@@ -121,19 +123,20 @@
- (CCK_DURATION((_bitrate > 10 ? 20 : 10), false, 60) + \
- CCK_DURATION(_bitrate, _short, AVG_PKT_SIZE))
-
--#define CCK_DURATION_LIST(_short) \
-- CCK_ACK_DURATION(10, _short), \
-- CCK_ACK_DURATION(20, _short), \
-- CCK_ACK_DURATION(55, _short), \
-- CCK_ACK_DURATION(110, _short)
-+#define CCK_DURATION_LIST(_short, _s) \
-+ CCK_ACK_DURATION(10, _short) >> _s, \
-+ CCK_ACK_DURATION(20, _short) >> _s, \
-+ CCK_ACK_DURATION(55, _short) >> _s, \
-+ CCK_ACK_DURATION(110, _short) >> _s
-
--#define CCK_GROUP \
-+#define CCK_GROUP(_s) \
- [MINSTREL_CCK_GROUP] = { \
- .streams = 0, \
- .flags = 0, \
-+ .shift = _s, \
- .duration = { \
-- CCK_DURATION_LIST(false), \
-- CCK_DURATION_LIST(true) \
-+ CCK_DURATION_LIST(false, _s), \
-+ CCK_DURATION_LIST(true, _s) \
- } \
- }
-
-@@ -151,47 +154,47 @@ MODULE_PARM_DESC(minstrel_vht_only,
- * BW -> SGI -> #streams
- */
- const struct mcs_group minstrel_mcs_groups[] = {
-- MCS_GROUP(1, 0, BW_20),
-- MCS_GROUP(2, 0, BW_20),
-- MCS_GROUP(3, 0, BW_20),
--
-- MCS_GROUP(1, 1, BW_20),
-- MCS_GROUP(2, 1, BW_20),
-- MCS_GROUP(3, 1, BW_20),
--
-- MCS_GROUP(1, 0, BW_40),
-- MCS_GROUP(2, 0, BW_40),
-- MCS_GROUP(3, 0, BW_40),
--
-- MCS_GROUP(1, 1, BW_40),
-- MCS_GROUP(2, 1, BW_40),
-- MCS_GROUP(3, 1, BW_40),
--
-- CCK_GROUP,
--
-- VHT_GROUP(1, 0, BW_20),
-- VHT_GROUP(2, 0, BW_20),
-- VHT_GROUP(3, 0, BW_20),
--
-- VHT_GROUP(1, 1, BW_20),
-- VHT_GROUP(2, 1, BW_20),
-- VHT_GROUP(3, 1, BW_20),
--
-- VHT_GROUP(1, 0, BW_40),
-- VHT_GROUP(2, 0, BW_40),
-- VHT_GROUP(3, 0, BW_40),
--
-- VHT_GROUP(1, 1, BW_40),
-- VHT_GROUP(2, 1, BW_40),
-- VHT_GROUP(3, 1, BW_40),
--
-- VHT_GROUP(1, 0, BW_80),
-- VHT_GROUP(2, 0, BW_80),
-- VHT_GROUP(3, 0, BW_80),
--
-- VHT_GROUP(1, 1, BW_80),
-- VHT_GROUP(2, 1, BW_80),
-- VHT_GROUP(3, 1, BW_80),
-+ MCS_GROUP(1, 0, BW_20, 5),
-+ MCS_GROUP(2, 0, BW_20, 4),
-+ MCS_GROUP(3, 0, BW_20, 4),
-+
-+ MCS_GROUP(1, 1, BW_20, 5),
-+ MCS_GROUP(2, 1, BW_20, 4),
-+ MCS_GROUP(3, 1, BW_20, 4),
-+
-+ MCS_GROUP(1, 0, BW_40, 4),
-+ MCS_GROUP(2, 0, BW_40, 4),
-+ MCS_GROUP(3, 0, BW_40, 4),
-+
-+ MCS_GROUP(1, 1, BW_40, 4),
-+ MCS_GROUP(2, 1, BW_40, 4),
-+ MCS_GROUP(3, 1, BW_40, 4),
-+
-+ CCK_GROUP(8),
-+
-+ VHT_GROUP(1, 0, BW_20, 5),
-+ VHT_GROUP(2, 0, BW_20, 4),
-+ VHT_GROUP(3, 0, BW_20, 4),
-+
-+ VHT_GROUP(1, 1, BW_20, 5),
-+ VHT_GROUP(2, 1, BW_20, 4),
-+ VHT_GROUP(3, 1, BW_20, 4),
-+
-+ VHT_GROUP(1, 0, BW_40, 4),
-+ VHT_GROUP(2, 0, BW_40, 4),
-+ VHT_GROUP(3, 0, BW_40, 4),
-+
-+ VHT_GROUP(1, 1, BW_40, 4),
-+ VHT_GROUP(2, 1, BW_40, 4),
-+ VHT_GROUP(3, 1, BW_40, 4),
-+
-+ VHT_GROUP(1, 0, BW_80, 4),
-+ VHT_GROUP(2, 0, BW_80, 4),
-+ VHT_GROUP(3, 0, BW_80, 4),
-+
-+ VHT_GROUP(1, 1, BW_80, 4),
-+ VHT_GROUP(2, 1, BW_80, 4),
-+ VHT_GROUP(3, 1, BW_80, 4),
- };
-
- static u8 sample_table[SAMPLE_COLUMNS][MCS_GROUP_RATES] __read_mostly;
-@@ -307,7 +310,8 @@ minstrel_ht_get_tp_avg(struct minstrel_h
- if (group != MINSTREL_CCK_GROUP)
- nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len);
-
-- nsecs += minstrel_mcs_groups[group].duration[rate];
-+ nsecs += minstrel_mcs_groups[group].duration[rate] <<
-+ minstrel_mcs_groups[group].shift;
-
- /*
- * For the throughput calculation, limit the probability value to 90% to
-@@ -755,12 +759,19 @@ minstrel_ht_tx_status(void *priv, struct
- minstrel_ht_update_rates(mp, mi);
- }
-
-+static inline int
-+minstrel_get_duration(int index)
-+{
-+ const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
-+ unsigned int duration = group->duration[index % MCS_GROUP_RATES];
-+ return duration << group->shift;
-+}
-+
- static void
- minstrel_calc_retransmit(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
- int index)
- {
- struct minstrel_rate_stats *mrs;
-- const struct mcs_group *group;
- unsigned int tx_time, tx_time_rtscts, tx_time_data;
- unsigned int cw = mp->cw_min;
- unsigned int ctime = 0;
-@@ -779,8 +790,7 @@ minstrel_calc_retransmit(struct minstrel
- mrs->retry_count_rtscts = 2;
- mrs->retry_updated = true;
-
-- group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
-- tx_time_data = group->duration[index % MCS_GROUP_RATES] * ampdu_len / 1000;
-+ tx_time_data = minstrel_get_duration(index) * ampdu_len / 1000;
-
- /* Contention time for first 2 tries */
- ctime = (t_slot * cw) >> 1;
-@@ -874,20 +884,24 @@ minstrel_ht_get_max_amsdu_len(struct min
- int group = mi->max_prob_rate / MCS_GROUP_RATES;
- const struct mcs_group *g = &minstrel_mcs_groups[group];
- int rate = mi->max_prob_rate % MCS_GROUP_RATES;
-+ unsigned int duration;
-
- /* Disable A-MSDU if max_prob_rate is bad */
- if (mi->groups[group].rates[rate].prob_ewma < MINSTREL_FRAC(50, 100))
- return 1;
-
-+ duration = g->duration[rate];
-+ duration <<= g->shift;
-+
- /* If the rate is slower than single-stream MCS1, make A-MSDU limit small */
-- if (g->duration[rate] > MCS_DURATION(1, 0, 52))
-+ if (duration > MCS_DURATION(1, 0, 52))
- return 500;
-
- /*
- * If the rate is slower than single-stream MCS4, limit A-MSDU to usual
- * data packet size
- */
-- if (g->duration[rate] > MCS_DURATION(1, 0, 104))
-+ if (duration > MCS_DURATION(1, 0, 104))
- return 1600;
-
- /*
-@@ -895,7 +909,7 @@ minstrel_ht_get_max_amsdu_len(struct min
- * rate success probability is less than 75%, limit A-MSDU to twice the usual
- * data packet size
- */
-- if (g->duration[rate] > MCS_DURATION(1, 0, 260) ||
-+ if (duration > MCS_DURATION(1, 0, 260) ||
- (minstrel_ht_get_prob_ewma(mi, mi->max_tp_rate[0]) <
- MINSTREL_FRAC(75, 100)))
- return 3200;
-@@ -942,13 +956,6 @@ minstrel_ht_update_rates(struct minstrel
- rate_control_set_rates(mp->hw, mi->sta, rates);
- }
-
--static inline int
--minstrel_get_duration(int index)
--{
-- const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
-- return group->duration[index % MCS_GROUP_RATES];
--}
--
- static int
- minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
- {
---- a/net/mac80211/rc80211_minstrel_ht.h
-+++ b/net/mac80211/rc80211_minstrel_ht.h
-@@ -33,9 +33,10 @@
- #define MCS_GROUP_RATES 10
-
- struct mcs_group {
-- u32 flags;
-- unsigned int streams;
-- unsigned int duration[MCS_GROUP_RATES];
-+ u16 flags;
-+ u8 streams;
-+ u8 shift;
-+ u16 duration[MCS_GROUP_RATES];
- };
-
- extern const struct mcs_group minstrel_mcs_groups[];
---- a/net/mac80211/rc80211_minstrel_ht_debugfs.c
-+++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
-@@ -58,6 +58,7 @@ minstrel_ht_stats_dump(struct minstrel_h
- static const int bitrates[4] = { 10, 20, 55, 110 };
- int idx = i * MCS_GROUP_RATES + j;
- unsigned int prob_ewmsd;
-+ unsigned int duration;
-
- if (!(mi->supported[i] & BIT(j)))
- continue;
-@@ -95,7 +96,9 @@ minstrel_ht_stats_dump(struct minstrel_h
- p += sprintf(p, " %3u ", idx);
-
- /* tx_time[rate(i)] in usec */
-- tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
-+ duration = mg->duration[j];
-+ duration <<= mg->shift;
-+ tx_time = DIV_ROUND_CLOSEST(duration, 1000);
- p += sprintf(p, "%6u ", tx_time);
-
- tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
-@@ -204,6 +207,7 @@ minstrel_ht_stats_csv_dump(struct minstr
- static const int bitrates[4] = { 10, 20, 55, 110 };
- int idx = i * MCS_GROUP_RATES + j;
- unsigned int prob_ewmsd;
-+ unsigned int duration;
-
- if (!(mi->supported[i] & BIT(j)))
- continue;
-@@ -238,7 +242,10 @@ minstrel_ht_stats_csv_dump(struct minstr
- }
-
- p += sprintf(p, "%u,", idx);
-- tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000);
-+
-+ duration = mg->duration[j];
-+ duration <<= mg->shift;
-+ tx_time = DIV_ROUND_CLOSEST(duration, 1000);
- p += sprintf(p, "%u,", tx_time);
-
- tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
+++ /dev/null
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sat, 10 Feb 2018 13:43:07 +0100
-Subject: [PATCH] mac80211: minstrel: fix using short preamble CCK rates on
- HT clients
-
-mi->supported[MINSTREL_CCK_GROUP] needs to be updated
-
-Fixes: 782dda00ab8e ("mac80211: minstrel_ht: move short preamble check out of get_rate")
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -1135,7 +1135,6 @@ minstrel_ht_update_caps(void *priv, stru
- struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
- u16 ht_cap = sta->ht_cap.cap;
- struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
-- struct sta_info *sinfo = container_of(sta, struct sta_info, sta);
- int use_vht;
- int n_supported = 0;
- int ack_dur;
-@@ -1267,8 +1266,7 @@ minstrel_ht_update_caps(void *priv, stru
- if (!n_supported)
- goto use_legacy;
-
-- if (test_sta_flag(sinfo, WLAN_STA_SHORT_PREAMBLE))
-- mi->cck_supported_short |= mi->cck_supported_short << 4;
-+ mi->supported[MINSTREL_CCK_GROUP] |= mi->cck_supported_short << 4;
-
- /* create an initial rate table with the lowest supported rates */
- minstrel_ht_update_stats(mp, mi);
+++ /dev/null
-From: Felix Fietkau <nbd@nbd.name>
-Date: Thu, 1 Mar 2018 13:27:54 +0100
-Subject: [PATCH] mac80211: minstrel: fix CCK rate group streams value
-
-Fixes a harmless underflow issue when CCK rates are actively being used
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -131,7 +131,7 @@
-
- #define CCK_GROUP(_s) \
- [MINSTREL_CCK_GROUP] = { \
-- .streams = 0, \
-+ .streams = 1, \
- .flags = 0, \
- .shift = _s, \
- .duration = { \
+++ /dev/null
-From: Felix Fietkau <nbd@nbd.name>
-Date: Thu, 1 Mar 2018 13:28:48 +0100
-Subject: [PATCH] mac80211: minstrel: fix sampling/reporting of CCK rates
- in HT mode
-
-Long/short preamble selection cannot be sampled separately, since it
-depends on the BSS state. Because of that, sampling attempts to
-currently not used preamble modes are not counted in the statistics,
-which leads to CCK rates being sampled too often.
-
-Fix statistics accounting for long/short preamble by increasing the
-index where necessary.
-Fix excessive CCK rate sampling by dropping unsupported sample attempts.
-
-This improves throughput on 2.4 GHz channels
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -281,7 +281,8 @@ minstrel_ht_get_stats(struct minstrel_pr
- break;
-
- /* short preamble */
-- if (!(mi->supported[group] & BIT(idx)))
-+ if ((mi->supported[group] & BIT(idx + 4)) &&
-+ (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE))
- idx += 4;
- }
- return &mi->groups[group].rates[idx];
-@@ -1080,18 +1081,23 @@ minstrel_ht_get_rate(void *priv, struct
- return;
-
- sample_group = &minstrel_mcs_groups[sample_idx / MCS_GROUP_RATES];
-+ sample_idx %= MCS_GROUP_RATES;
-+
-+ if (sample_group == &minstrel_mcs_groups[MINSTREL_CCK_GROUP] &&
-+ (sample_idx >= 4) != txrc->short_preamble)
-+ return;
-+
- info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
- rate->count = 1;
-
-- if (sample_idx / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) {
-+ if (sample_group == &minstrel_mcs_groups[MINSTREL_CCK_GROUP]) {
- int idx = sample_idx % ARRAY_SIZE(mp->cck_rates);
- rate->idx = mp->cck_rates[idx];
- } else if (sample_group->flags & IEEE80211_TX_RC_VHT_MCS) {
- ieee80211_rate_set_vht(rate, sample_idx % MCS_GROUP_RATES,
- sample_group->streams);
- } else {
-- rate->idx = sample_idx % MCS_GROUP_RATES +
-- (sample_group->streams - 1) * 8;
-+ rate->idx = sample_idx + (sample_group->streams - 1) * 8;
- }
-
- rate->flags = sample_group->flags;
+++ /dev/null
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sat, 3 Mar 2018 18:48:58 +0100
-Subject: [PATCH] mac80211: minstrel: do not sample rates 3 times slower than
- max_prob_rate
-
-These rates are highly unlikely to be used quickly, even if the link
-deteriorates rapidly. This improves throughput in cases where CCK rates
-are not reliable enough to be skipped entirely during sampling.
-Sampling these rates regularly can cost a lot of airtime.
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -1004,10 +1004,13 @@ minstrel_get_sample_rate(struct minstrel
- return -1;
-
- /*
-- * Do not sample if the probability is already higher than 95%
-- * to avoid wasting airtime.
-+ * Do not sample if the probability is already higher than 95%,
-+ * or if the rate is 3 times slower than the current max probability
-+ * rate, to avoid wasting airtime.
- */
-- if (mrs->prob_ewma > MINSTREL_FRAC(95, 100))
-+ sample_dur = minstrel_get_duration(sample_idx);
-+ if (mrs->prob_ewma > MINSTREL_FRAC(95, 100) ||
-+ minstrel_get_duration(mi->max_prob_rate) * 3 < sample_dur)
- return -1;
-
- /*
-@@ -1017,7 +1020,6 @@ minstrel_get_sample_rate(struct minstrel
-
- cur_max_tp_streams = minstrel_mcs_groups[tp_rate1 /
- MCS_GROUP_RATES].streams;
-- sample_dur = minstrel_get_duration(sample_idx);
- if (sample_dur >= minstrel_get_duration(tp_rate2) &&
- (cur_max_tp_streams - 1 <
- minstrel_mcs_groups[sample_group].streams ||
+++ /dev/null
-From: Felix Fietkau <nbd@nbd.name>
-Date: Thu, 8 Mar 2018 21:00:56 +0100
-Subject: [PATCH] mac80211: fix memory accounting with A-MSDU aggregation
-
-fq uses skb->truesize for memory usage tracking. Increments/decrements
-are done on enqueue/dequeue.
-When A-MSDU aggregation is performed on tx side, the packet is
-aggregated with the last packet in the queue belonging to the same flow.
-There are multiple bugs here:
-- The truesize field of the aggregated packet isn't updated, so memory
-usage is underestimated
-- fq->memory_usage isn't adjusted.
-
-Because of the combination of both bugs, this only causes tx issues in
-rare cases, mainly when the A-MSDU head needs to be reallocated.
-
-Fix this by adjusting both truesize of the A-MSDU head and adding the
-truesize delta to fq->memory_usage.
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/net/mac80211/tx.c
-+++ b/net/mac80211/tx.c
-@@ -3194,6 +3194,7 @@ static bool ieee80211_amsdu_aggregate(st
- u8 max_subframes = sta->sta.max_amsdu_subframes;
- int max_frags = local->hw.max_tx_fragments;
- int max_amsdu_len = sta->sta.max_amsdu_len;
-+ int orig_truesize;
- __be16 len;
- void *data;
- bool ret = false;
-@@ -3225,12 +3226,13 @@ static bool ieee80211_amsdu_aggregate(st
- flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
- head = skb_peek_tail(&flow->queue);
- if (!head)
-- goto out;
-+ goto unlock;
-
-+ orig_truesize = head->truesize;
- orig_len = head->len;
-
- if (skb->len + head->len > max_amsdu_len)
-- goto out;
-+ goto unlock;
-
- nfrags = 1 + skb_shinfo(skb)->nr_frags;
- nfrags += 1 + skb_shinfo(head)->nr_frags;
-@@ -3288,6 +3290,9 @@ out_recalc:
- fq_recalc_backlog(fq, tin, flow);
- }
- out:
-+ fq->memory_usage += head->truesize - orig_truesize;
-+
-+unlock:
- spin_unlock_bh(&fq->lock);
-
- return ret;
+++ /dev/null
-From: Felix Fietkau <nbd@nbd.name>
-Date: Wed, 16 Jan 2019 21:47:54 +0100
-Subject: [PATCH] mac80211: minstrel_ht: add flag to indicate
- missing/inaccurate tx A-MPDU length
-
-Some hardware (e.g. MediaTek MT7603) cannot report A-MPDU length in tx status
-information. Add support for a flag to indicate that, to allow minstrel_ht
-to use a fixed value in its internal calculation (which gives better results
-than just defaulting to 1).
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/include/net/mac80211.h
-+++ b/include/net/mac80211.h
-@@ -2134,6 +2134,9 @@ struct ieee80211_txq {
- * @IEEE80211_HW_NEEDS_ALIGNED4_SKBS: Driver need aligned skbs to four-byte.
- * Padding will be added after ieee80211_hdr, before IV/LLC.
- *
-+ * @IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN: Driver does not report accurate A-MPDU
-+ * length in tx status information
-+ *
- * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
- */
- enum ieee80211_hw_flags {
-@@ -2180,6 +2183,7 @@ enum ieee80211_hw_flags {
- IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP,
- IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP,
- IEEE80211_HW_NEEDS_ALIGNED4_SKBS,
-+ IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN,
-
- /* keep last, obviously */
- NUM_IEEE80211_HW_FLAGS
---- a/net/mac80211/debugfs.c
-+++ b/net/mac80211/debugfs.c
-@@ -215,6 +215,7 @@ static const char *hw_flag_names[] = {
- FLAG(DEAUTH_NEED_MGD_TX_PREP),
- FLAG(DOESNT_SUPPORT_QOS_NDP),
- FLAG(NEEDS_ALIGNED4_SKBS),
-+ FLAG(TX_STATUS_NO_AMPDU_LEN),
- #undef FLAG
- };
-
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -294,6 +294,15 @@ minstrel_get_ratestats(struct minstrel_h
- return &mi->groups[index / MCS_GROUP_RATES].rates[index % MCS_GROUP_RATES];
- }
-
-+static unsigned int
-+minstrel_ht_avg_ampdu_len(struct minstrel_ht_sta *mi)
-+{
-+ if (!mi->avg_ampdu_len)
-+ return AVG_AMPDU_SIZE;
-+
-+ return MINSTREL_TRUNC(mi->avg_ampdu_len);
-+}
-+
- /*
- * Return current throughput based on the average A-MPDU length, taking into
- * account the expected number of retransmissions and their expected length
-@@ -309,7 +318,7 @@ minstrel_ht_get_tp_avg(struct minstrel_h
- return 0;
-
- if (group != MINSTREL_CCK_GROUP)
-- nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len);
-+ nsecs = 1000 * mi->overhead / minstrel_ht_avg_ampdu_len(mi);
-
- nsecs += minstrel_mcs_groups[group].duration[rate] <<
- minstrel_mcs_groups[group].shift;
-@@ -503,8 +512,12 @@ minstrel_ht_update_stats(struct minstrel
- u16 tmp_cck_tp_rate[MAX_THR_RATES], index;
-
- if (mi->ampdu_packets > 0) {
-- mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len,
-- MINSTREL_FRAC(mi->ampdu_len, mi->ampdu_packets), EWMA_LEVEL);
-+ if (!ieee80211_hw_check(mp->hw, TX_STATUS_NO_AMPDU_LEN))
-+ mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len,
-+ MINSTREL_FRAC(mi->ampdu_len, mi->ampdu_packets),
-+ EWMA_LEVEL);
-+ else
-+ mi->avg_ampdu_len = 0;
- mi->ampdu_len = 0;
- mi->ampdu_packets = 0;
- }
-@@ -709,7 +722,9 @@ minstrel_ht_tx_status(void *priv, struct
- mi->ampdu_len += info->status.ampdu_len;
-
- if (!mi->sample_wait && !mi->sample_tries && mi->sample_count > 0) {
-- mi->sample_wait = 16 + 2 * MINSTREL_TRUNC(mi->avg_ampdu_len);
-+ int avg_ampdu_len = minstrel_ht_avg_ampdu_len(mi);
-+
-+ mi->sample_wait = 16 + 2 * avg_ampdu_len;
- mi->sample_tries = 1;
- mi->sample_count--;
- }
-@@ -777,7 +792,7 @@ minstrel_calc_retransmit(struct minstrel
- unsigned int cw = mp->cw_min;
- unsigned int ctime = 0;
- unsigned int t_slot = 9; /* FIXME */
-- unsigned int ampdu_len = MINSTREL_TRUNC(mi->avg_ampdu_len);
-+ unsigned int ampdu_len = minstrel_ht_avg_ampdu_len(mi);
- unsigned int overhead = 0, overhead_rtscts = 0;
-
- mrs = minstrel_get_ratestats(mi, index);
---- a/net/mac80211/rc80211_minstrel_ht_debugfs.c
-+++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
-@@ -163,9 +163,10 @@ minstrel_ht_stats_open(struct inode *ino
- "lookaround %d\n",
- max(0, (int) mi->total_packets - (int) mi->sample_packets),
- mi->sample_packets);
-- p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
-- MINSTREL_TRUNC(mi->avg_ampdu_len),
-- MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
-+ if (mi->avg_ampdu_len)
-+ p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
-+ MINSTREL_TRUNC(mi->avg_ampdu_len),
-+ MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
- ms->len = p - ms->buf;
- WARN_ON(ms->len + sizeof(*ms) > 32768);
-
* control port protocol ethertype. The device also honours the
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
-@@ -3523,7 +3523,9 @@ int ieee80211_check_combinations(struct
+@@ -3622,7 +3622,9 @@ int ieee80211_check_combinations(struct
}
/* Always allow software iftypes */
projects / openwrt / staging / chunkeey.git / commitdiff