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

Pull networking updates from David Miller:

Changes of note:

 1) Allow to schedule ICMP packets in IPVS, from Alex Gartrell.

 2) Provide FIB table ID in ipv4 route dumps just as ipv6 does, from
    David Ahern.

 3) Allow the user to ask for the statistics to be filtered out of
    ipv4/ipv6 address netlink dumps.  From Sowmini Varadhan.

 4) More work to pass the network namespace context around deep into
    various packet path APIs, starting with the netfilter hooks.  From
    Eric W Biederman.

 5) Add layer 2 TX/RX checksum offloading to qeth driver, from Thomas
    Richter.

 6) Use usec resolution for SYN/ACK RTTs in TCP, from Yuchung Cheng.

 7) Support Very High Throughput in wireless MESH code, from Bob
    Copeland.

 8) Allow setting the ageing_time in switchdev/rocker.  From Scott
    Feldman.

 9) Properly autoload L2TP type modules, from Stephen Hemminger.

10) Fix and enable offload features by default in 8139cp driver, from
    David Woodhouse.

11) Support both ipv4 and ipv6 sockets in a single vxlan device, from
    Jiri Benc.

12) Fix CWND limiting of thin streams in TCP, from Bendik Rønning
    Opstad.

13) Fix IPSEC flowcache overflows on large systems, from Steffen
    Klassert.

14) Convert bridging to track VLANs using rhashtable entries rather than
    a bitmap.  From Nikolay Aleksandrov.

15) Make TCP listener handling completely lockless, this is a major
    accomplishment.  Incoming request sockets now live in the
    established hash table just like any other socket too.

    From Eric Dumazet.

15) Provide more bridging attributes to netlink, from Nikolay
    Aleksandrov.

16) Use hash based algorithm for ipv4 multipath routing, this was very
    long overdue.  From Peter Nørlund.

17) Several y2038 cures, mostly avoiding timespec.  From Arnd Bergmann.

18) Allow non-root execution of EBPF programs, from Alexei Starovoitov.

19) Support SO_INCOMING_CPU as setsockopt, from Eric Dumazet.  This
    influences the port binding selection logic used by SO_REUSEPORT.

20) Add ipv6 support to VRF, from David Ahern.

21) Add support for Mellanox Spectrum switch ASIC, from Jiri Pirko.

22) Add rtl8xxxu Realtek wireless driver, from Jes Sorensen.

23) Implement RACK loss recovery in TCP, from Yuchung Cheng.

24) Support multipath routes in MPLS, from Roopa Prabhu.

25) Fix POLLOUT notification for listening sockets in AF_UNIX, from Eric
    Dumazet.

26) Add new QED Qlogic river, from Yuval Mintz, Manish Chopra, and
    Sudarsana Kalluru.

27) Don't fetch timestamps on AF_UNIX sockets, from Hannes Frederic
    Sowa.

28) Support ipv6 geneve tunnels, from John W Linville.

29) Add flood control support to switchdev layer, from Ido Schimmel.

30) Fix CHECKSUM_PARTIAL handling of potentially fragmented frames, from
    Hannes Frederic Sowa.

31) Support persistent maps and progs in bpf, from Daniel Borkmann.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1790 commits)
  sh_eth: use DMA barriers
  switchdev: respect SKIP_EOPNOTSUPP flag in case there is no recursion
  net: sched: kill dead code in sch_choke.c
  irda: Delete an unnecessary check before the function call "irlmp_unregister_service"
  net: dsa: mv88e6xxx: include DSA ports in VLANs
  net: dsa: mv88e6xxx: disable SA learning for DSA and CPU ports
  net/core: fix for_each_netdev_feature
  vlan: Invoke driver vlan hooks only if device is present
  arcnet/com20020: add LEDS_CLASS dependency
  bpf, verifier: annotate verbose printer with __printf
  dp83640: Only wait for timestamps for packets with timestamping enabled.
  ptp: Change ptp_class to a proper bitmask
  dp83640: Prune rx timestamp list before reading from it
  dp83640: Delay scheduled work.
  dp83640: Include hash in timestamp/packet matching
  ipv6: fix tunnel error handling
  net/mlx5e: Fix LSO vlan insertion
  net/mlx5e: Re-eanble client vlan TX acceleration
  net/mlx5e: Return error in case mlx5e_set_features() fails
  net/mlx5e: Don't allow more than max supported channels
  ...

1 files changed, 102 insertions, 20 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c
index 5ae9c8aa868f..d1ad10391b47 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.c
@@ -177,9 +177,6 @@ static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 
 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
-	if (IWL_MVM_RS_DISABLE_P2P_MIMO &&
-	    iwl_mvm_vif_low_latency(mvmvif) && mvmsta->vif->p2p)
-		return false;
 
 	if (mvm->nvm_data->sku_cap_mimo_disabled)
 		return false;
@@ -524,14 +521,56 @@ static const char *rs_pretty_lq_type(enum iwl_table_type type)
 	return lq_types[type];
 }
 
+static char *rs_pretty_rate(const struct rs_rate *rate)
+{
+	static char buf[40];
+	static const char * const legacy_rates[] = {
+		[IWL_RATE_1M_INDEX] = "1M",
+		[IWL_RATE_2M_INDEX] = "2M",
+		[IWL_RATE_5M_INDEX] = "5.5M",
+		[IWL_RATE_11M_INDEX] = "11M",
+		[IWL_RATE_6M_INDEX] = "6M",
+		[IWL_RATE_9M_INDEX] = "9M",
+		[IWL_RATE_12M_INDEX] = "12M",
+		[IWL_RATE_18M_INDEX] = "18M",
+		[IWL_RATE_24M_INDEX] = "24M",
+		[IWL_RATE_36M_INDEX] = "36M",
+		[IWL_RATE_48M_INDEX] = "48M",
+		[IWL_RATE_54M_INDEX] = "54M",
+	};
+	static const char *const ht_vht_rates[] = {
+		[IWL_RATE_MCS_0_INDEX] = "MCS0",
+		[IWL_RATE_MCS_1_INDEX] = "MCS1",
+		[IWL_RATE_MCS_2_INDEX] = "MCS2",
+		[IWL_RATE_MCS_3_INDEX] = "MCS3",
+		[IWL_RATE_MCS_4_INDEX] = "MCS4",
+		[IWL_RATE_MCS_5_INDEX] = "MCS5",
+		[IWL_RATE_MCS_6_INDEX] = "MCS6",
+		[IWL_RATE_MCS_7_INDEX] = "MCS7",
+		[IWL_RATE_MCS_8_INDEX] = "MCS8",
+		[IWL_RATE_MCS_9_INDEX] = "MCS9",
+	};
+	const char *rate_str;
+
+	if (is_type_legacy(rate->type))
+		rate_str = legacy_rates[rate->index];
+	else if (is_type_ht(rate->type) || is_type_vht(rate->type))
+		rate_str = ht_vht_rates[rate->index];
+	else
+		rate_str = "BAD_RATE";
+
+	sprintf(buf, "(%s|%s|%s)", rs_pretty_lq_type(rate->type),
+		rs_pretty_ant(rate->ant), rate_str);
+	return buf;
+}
+
 static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate,
 				const char *prefix)
 {
 	IWL_DEBUG_RATE(mvm,
-		       "%s: (%s: %d) ANT: %s BW: %d SGI: %d LDPC: %d STBC: %d\n",
-		       prefix, rs_pretty_lq_type(rate->type),
-		       rate->index, rs_pretty_ant(rate->ant),
-		       rate->bw, rate->sgi, rate->ldpc, rate->stbc);
+		       "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n",
+		       prefix, rs_pretty_rate(rate), rate->bw,
+		       rate->sgi, rate->ldpc, rate->stbc);
 }
 
 static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
@@ -562,8 +601,8 @@ static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
 }
 
 static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm,
-				      struct iwl_lq_sta *lq_data, u8 tid,
-				      struct ieee80211_sta *sta)
+				     struct iwl_lq_sta *lq_data, u8 tid,
+				     struct ieee80211_sta *sta)
 {
 	int ret = -EAGAIN;
 
@@ -1485,7 +1524,7 @@ static s32 rs_get_best_rate(struct iwl_mvm *mvm,
 	u32 target_tpt;
 	int rate_idx;
 
-	if (success_ratio > IWL_MVM_RS_SR_NO_DECREASE) {
+	if (success_ratio >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
 		target_tpt = 100 * expected_current_tpt;
 		IWL_DEBUG_RATE(mvm,
 			       "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n",
@@ -1493,7 +1532,7 @@ static s32 rs_get_best_rate(struct iwl_mvm *mvm,
 	} else {
 		target_tpt = lq_sta->last_tpt;
 		IWL_DEBUG_RATE(mvm,
-			       "SR %d not thag good. Find rate exceeding ACTUAL_TPT %d\n",
+			       "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n",
 			       success_ratio, target_tpt);
 	}
 
@@ -1622,6 +1661,51 @@ static void rs_update_rate_tbl(struct iwl_mvm *mvm,
 	iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false);
 }
 
+static bool rs_tweak_rate_tbl(struct iwl_mvm *mvm,
+			      struct ieee80211_sta *sta,
+			      struct iwl_lq_sta *lq_sta,
+			      struct iwl_scale_tbl_info *tbl,
+			      enum rs_action scale_action)
+{
+	if (sta->bandwidth != IEEE80211_STA_RX_BW_80)
+		return false;
+
+	if (!is_vht_siso(&tbl->rate))
+		return false;
+
+	if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_80) &&
+	    (tbl->rate.index == IWL_RATE_MCS_0_INDEX) &&
+	    (scale_action == RS_ACTION_DOWNSCALE)) {
+		tbl->rate.bw = RATE_MCS_CHAN_WIDTH_20;
+		tbl->rate.index = IWL_RATE_MCS_4_INDEX;
+		IWL_DEBUG_RATE(mvm, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n");
+		goto tweaked;
+	}
+
+	/* Go back to 80Mhz MCS1 only if we've established that 20Mhz MCS5 is
+	 * sustainable, i.e. we're past the test window. We can't go back
+	 * if MCS5 is just tested as this will happen always after switching
+	 * to 20Mhz MCS4 because the rate stats are cleared.
+	 */
+	if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_20) &&
+	    (((tbl->rate.index == IWL_RATE_MCS_5_INDEX) &&
+	     (scale_action == RS_ACTION_STAY)) ||
+	     ((tbl->rate.index > IWL_RATE_MCS_5_INDEX) &&
+	      (scale_action == RS_ACTION_UPSCALE)))) {
+		tbl->rate.bw = RATE_MCS_CHAN_WIDTH_80;
+		tbl->rate.index = IWL_RATE_MCS_1_INDEX;
+		IWL_DEBUG_RATE(mvm, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n");
+		goto tweaked;
+	}
+
+	return false;
+
+tweaked:
+	rs_set_expected_tpt_table(lq_sta, tbl);
+	rs_rate_scale_clear_tbl_windows(mvm, tbl);
+	return true;
+}
+
 static enum rs_column rs_get_next_column(struct iwl_mvm *mvm,
 					 struct iwl_lq_sta *lq_sta,
 					 struct ieee80211_sta *sta,
@@ -2174,9 +2258,9 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm,
 	if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) &&
 	    (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) {
 		IWL_DEBUG_RATE(mvm,
-			       "(%s: %d): Test Window: succ %d total %d\n",
-			       rs_pretty_lq_type(rate->type),
-			       index, window->success_counter, window->counter);
+			       "%s: Test Window: succ %d total %d\n",
+			       rs_pretty_rate(rate),
+			       window->success_counter, window->counter);
 
 		/* Can't calculate this yet; not enough history */
 		window->average_tpt = IWL_INVALID_VALUE;
@@ -2253,8 +2337,8 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm,
 		high_tpt = tbl->win[high].average_tpt;
 
 	IWL_DEBUG_RATE(mvm,
-		       "(%s: %d): cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",
-		       rs_pretty_lq_type(rate->type), index, current_tpt, sr,
+		       "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",
+		       rs_pretty_rate(rate), current_tpt, sr,
 		       low, high, low_tpt, high_tpt);
 
 	scale_action = rs_get_rate_action(mvm, tbl, sr, low, high,
@@ -2305,6 +2389,8 @@ lq_update:
 	/* Replace uCode's rate table for the destination station. */
 	if (update_lq) {
 		tbl->rate.index = index;
+		if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK)
+			rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action);
 		rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
 	}
 
@@ -2542,7 +2628,6 @@ static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm,
 		}
 	}
 
-	rs_dump_rate(mvm, rate, "OPTIMAL RATE");
 	return rate;
 }
 
@@ -2983,9 +3068,6 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 	else
 		rs_vht_init(mvm, sta, lq_sta, vht_cap);
 
-	if (IWL_MVM_RS_DISABLE_P2P_MIMO && sta_priv->vif->p2p)
-		lq_sta->active_mimo2_rate = 0;
-
 	lq_sta->max_legacy_rate_idx =
 		rs_get_max_rate_from_mask(lq_sta->active_legacy_rate);
 	lq_sta->max_siso_rate_idx =