Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
 "Highlights:

   1) Support SPI based w5100 devices, from Akinobu Mita.

   2) Partial Segmentation Offload, from Alexander Duyck.

   3) Add GMAC4 support to stmmac driver, from Alexandre TORGUE.

   4) Allow cls_flower stats offload, from Amir Vadai.

   5) Implement bpf blinding, from Daniel Borkmann.

   6) Optimize _ASYNC_ bit twiddling on sockets, unless the socket is
      actually using FASYNC these atomics are superfluous.  From Eric
      Dumazet.

   7) Run TCP more preemptibly, also from Eric Dumazet.

   8) Support LED blinking, EEPROM dumps, and rxvlan offloading in mlx5e
      driver, from Gal Pressman.

   9) Allow creating ppp devices via rtnetlink, from Guillaume Nault.

  10) Improve BPF usage documentation, from Jesper Dangaard Brouer.

  11) Support tunneling offloads in qed, from Manish Chopra.

  12) aRFS offloading in mlx5e, from Maor Gottlieb.

  13) Add RFS and RPS support to SCTP protocol, from Marcelo Ricardo
      Leitner.

  14) Add MSG_EOR support to TCP, this allows controlling packet
      coalescing on application record boundaries for more accurate
      socket timestamp sampling.  From Martin KaFai Lau.

  15) Fix alignment of 64-bit netlink attributes across the board, from
      Nicolas Dichtel.

  16) Per-vlan stats in bridging, from Nikolay Aleksandrov.

  17) Several conversions of drivers to ethtool ksettings, from Philippe
      Reynes.

  18) Checksum neutral ILA in ipv6, from Tom Herbert.

  19) Factorize all of the various marvell dsa drivers into one, from
      Vivien Didelot

  20) Add VF support to qed driver, from Yuval Mintz"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1649 commits)
  Revert "phy dp83867: Fix compilation with CONFIG_OF_MDIO=m"
  Revert "phy dp83867: Make rgmii parameters optional"
  r8169: default to 64-bit DMA on recent PCIe chips
  phy dp83867: Make rgmii parameters optional
  phy dp83867: Fix compilation with CONFIG_OF_MDIO=m
  bpf: arm64: remove callee-save registers use for tmp registers
  asix: Fix offset calculation in asix_rx_fixup() causing slow transmissions
  switchdev: pass pointer to fib_info instead of copy
  net_sched: close another race condition in tcf_mirred_release()
  tipc: fix nametable publication field in nl compat
  drivers: net: Don't print unpopulated net_device name
  qed: add support for dcbx.
  ravb: Add missing free_irq() calls to ravb_close()
  qed: Remove a stray tab
  net: ethernet: fec-mpc52xx: use phy_ethtool_{get|set}_link_ksettings
  net: ethernet: fec-mpc52xx: use phydev from struct net_device
  bpf, doc: fix typo on bpf_asm descriptions
  stmmac: hardware TX COE doesn't work when force_thresh_dma_mode is set
  net: ethernet: fs-enet: use phy_ethtool_{get|set}_link_ksettings
  net: ethernet: fs-enet: use phydev from struct net_device
  ...

1 files changed, 72 insertions, 9 deletions

diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 370d677b547b..30fbabf4bcbc 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -883,6 +883,59 @@ minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
 	ratetbl->rate[offset].flags = flags;
 }
 
+static inline int
+minstrel_ht_get_prob_ewma(struct minstrel_ht_sta *mi, int rate)
+{
+	int group = rate / MCS_GROUP_RATES;
+	rate %= MCS_GROUP_RATES;
+	return mi->groups[group].rates[rate].prob_ewma;
+}
+
+static int
+minstrel_ht_get_max_amsdu_len(struct minstrel_ht_sta *mi)
+{
+	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;
+
+	/* Disable A-MSDU if max_prob_rate is bad */
+	if (mi->groups[group].rates[rate].prob_ewma < MINSTREL_FRAC(50, 100))
+		return 1;
+
+	/* If the rate is slower than single-stream MCS1, make A-MSDU limit small */
+	if (g->duration[rate] > 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))
+		return 1600;
+
+	/*
+	 * If the rate is slower than single-stream MCS7, or if the max throughput
+	 * 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) ||
+	    (minstrel_ht_get_prob_ewma(mi, mi->max_tp_rate[0]) <
+	     MINSTREL_FRAC(75, 100)))
+		return 3200;
+
+	/*
+	 * HT A-MPDU limits maximum MPDU size under BA agreement to 4095 bytes.
+	 * Since aggregation sessions are started/stopped without txq flush, use
+	 * the limit here to avoid the complexity of having to de-aggregate
+	 * packets in the queue.
+	 */
+	if (!mi->sta->vht_cap.vht_supported)
+		return IEEE80211_MAX_MPDU_LEN_HT_BA;
+
+	/* unlimited */
+	return 0;
+}
+
 static void
 minstrel_ht_update_rates(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
 {
@@ -907,6 +960,7 @@ minstrel_ht_update_rates(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
 		minstrel_ht_set_rate(mp, mi, rates, i++, mi->max_prob_rate);
 	}
 
+	mi->sta->max_rc_amsdu_len = minstrel_ht_get_max_amsdu_len(mi);
 	rates->rate[i].idx = -1;
 	rate_control_set_rates(mp->hw, mi->sta, rates);
 }
@@ -924,6 +978,7 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
 	struct minstrel_rate_stats *mrs;
 	struct minstrel_mcs_group_data *mg;
 	unsigned int sample_dur, sample_group, cur_max_tp_streams;
+	int tp_rate1, tp_rate2;
 	int sample_idx = 0;
 
 	if (mi->sample_wait > 0) {
@@ -945,14 +1000,22 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
 	mrs = &mg->rates[sample_idx];
 	sample_idx += sample_group * MCS_GROUP_RATES;
 
+	/* Set tp_rate1, tp_rate2 to the highest / second highest max_tp_rate */
+	if (minstrel_get_duration(mi->max_tp_rate[0]) >
+	    minstrel_get_duration(mi->max_tp_rate[1])) {
+		tp_rate1 = mi->max_tp_rate[1];
+		tp_rate2 = mi->max_tp_rate[0];
+	} else {
+		tp_rate1 = mi->max_tp_rate[0];
+		tp_rate2 = mi->max_tp_rate[1];
+	}
+
 	/*
 	 * Sampling might add some overhead (RTS, no aggregation)
-	 * to the frame. Hence, don't use sampling for the currently
-	 * used rates.
+	 * to the frame. Hence, don't use sampling for the highest currently
+	 * used highest throughput or probability rate.
 	 */
-	if (sample_idx == mi->max_tp_rate[0] ||
-	    sample_idx == mi->max_tp_rate[1] ||
-	    sample_idx == mi->max_prob_rate)
+	if (sample_idx == mi->max_tp_rate[0] || sample_idx == mi->max_prob_rate)
 		return -1;
 
 	/*
@@ -967,10 +1030,10 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
 	 * if the link is working perfectly.
 	 */
 
-	cur_max_tp_streams = minstrel_mcs_groups[mi->max_tp_rate[0] /
+	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(mi->max_tp_rate[1]) &&
+	if (sample_dur >= minstrel_get_duration(tp_rate2) &&
 	    (cur_max_tp_streams - 1 <
 	     minstrel_mcs_groups[sample_group].streams ||
 	     sample_dur >= minstrel_get_duration(mi->max_prob_rate))) {
@@ -1074,7 +1137,7 @@ minstrel_ht_update_cck(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
 {
 	int i;
 
-	if (sband->band != IEEE80211_BAND_2GHZ)
+	if (sband->band != NL80211_BAND_2GHZ)
 		return;
 
 	if (!ieee80211_hw_check(mp->hw, SUPPORTS_HT_CCK_RATES))
@@ -1272,7 +1335,7 @@ minstrel_ht_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
 	int max_rates = 0;
 	int i;
 
-	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+	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;