Merge tag 'net-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core:

   - bpf:
        - allow bpf programs calling kernel functions (initially to
          reuse TCP congestion control implementations)
        - enable task local storage for tracing programs - remove the
          need to store per-task state in hash maps, and allow tracing
          programs access to task local storage previously added for
          BPF_LSM
        - add bpf_for_each_map_elem() helper, allowing programs to walk
          all map elements in a more robust and easier to verify fashion
        - sockmap: support UDP and cross-protocol BPF_SK_SKB_VERDICT
          redirection
        - lpm: add support for batched ops in LPM trie
        - add BTF_KIND_FLOAT support - mostly to allow use of BTF on
          s390 which has floats in its headers files
        - improve BPF syscall documentation and extend the use of kdoc
          parsing scripts we already employ for bpf-helpers
        - libbpf, bpftool: support static linking of BPF ELF files
        - improve support for encapsulation of L2 packets

   - xdp: restructure redirect actions to avoid a runtime lookup,
     improving performance by 4-8% in microbenchmarks

   - xsk: build skb by page (aka generic zerocopy xmit) - improve
     performance of software AF_XDP path by 33% for devices which don't
     need headers in the linear skb part (e.g. virtio)

   - nexthop: resilient next-hop groups - improve path stability on
     next-hops group changes (incl. offload for mlxsw)

   - ipv6: segment routing: add support for IPv4 decapsulation

   - icmp: add support for RFC 8335 extended PROBE messages

   - inet: use bigger hash table for IP ID generation

   - tcp: deal better with delayed TX completions - make sure we don't
     give up on fast TCP retransmissions only because driver is slow in
     reporting that it completed transmitting the original

   - tcp: reorder tcp_congestion_ops for better cache locality

   - mptcp:
        - add sockopt support for common TCP options
        - add support for common TCP msg flags
        - include multiple address ids in RM_ADDR
        - add reset option support for resetting one subflow

   - udp: GRO L4 improvements - improve 'forward' / 'frag_list'
     co-existence with UDP tunnel GRO, allowing the first to take place
     correctly even for encapsulated UDP traffic

   - micro-optimize dev_gro_receive() and flow dissection, avoid
     retpoline overhead on VLAN and TEB GRO

   - use less memory for sysctls, add a new sysctl type, to allow using
     u8 instead of "int" and "long" and shrink networking sysctls

   - veth: allow GRO without XDP - this allows aggregating UDP packets
     before handing them off to routing, bridge, OvS, etc.

   - allow specifing ifindex when device is moved to another namespace

   - netfilter:
        - nft_socket: add support for cgroupsv2
        - nftables: add catch-all set element - special element used to
          define a default action in case normal lookup missed
        - use net_generic infra in many modules to avoid allocating
          per-ns memory unnecessarily

   - xps: improve the xps handling to avoid potential out-of-bound
     accesses and use-after-free when XPS change race with other
     re-configuration under traffic

   - add a config knob to turn off per-cpu netdev refcnt to catch
     underflows in testing

  Device APIs:

   - add WWAN subsystem to organize the WWAN interfaces better and
     hopefully start driving towards more unified and vendor-
     independent APIs

   - ethtool:
        - add interface for reading IEEE MIB stats (incl. mlx5 and bnxt
          support)
        - allow network drivers to dump arbitrary SFP EEPROM data,
          current offset+length API was a poor fit for modern SFP which
          define EEPROM in terms of pages (incl. mlx5 support)

   - act_police, flow_offload: add support for packet-per-second
     policing (incl. offload for nfp)

   - psample: add additional metadata attributes like transit delay for
     packets sampled from switch HW (and corresponding egress and
     policy-based sampling in the mlxsw driver)

   - dsa: improve support for sandwiched LAGs with bridge and DSA

   - netfilter:
        - flowtable: use direct xmit in topologies with IP forwarding,
          bridging, vlans etc.
        - nftables: counter hardware offload support

   - Bluetooth:
        - improvements for firmware download w/ Intel devices
        - add support for reading AOSP vendor capabilities
        - add support for virtio transport driver

   - mac80211:
        - allow concurrent monitor iface and ethernet rx decap
        - set priority and queue mapping for injected frames

   - phy: add support for Clause-45 PHY Loopback

   - pci/iov: add sysfs MSI-X vector assignment interface to distribute
     MSI-X resources to VFs (incl. mlx5 support)

  New hardware/drivers:

   - dsa: mv88e6xxx: add support for Marvell mv88e6393x - 11-port
     Ethernet switch with 8x 1-Gigabit Ethernet and 3x 10-Gigabit
     interfaces.

   - dsa: support for legacy Broadcom tags used on BCM5325, BCM5365 and
     BCM63xx switches

   - Microchip KSZ8863 and KSZ8873; 3x 10/100Mbps Ethernet switches

   - ath11k: support for QCN9074 a 802.11ax device

   - Bluetooth: Broadcom BCM4330 and BMC4334

   - phy: Marvell 88X2222 transceiver support

   - mdio: add BCM6368 MDIO mux bus controller

   - r8152: support RTL8153 and RTL8156 (USB Ethernet) chips

   - mana: driver for Microsoft Azure Network Adapter (MANA)

   - Actions Semi Owl Ethernet MAC

   - can: driver for ETAS ES58X CAN/USB interfaces

  Pure driver changes:

   - add XDP support to: enetc, igc, stmmac

   - add AF_XDP support to: stmmac

   - virtio:
        - page_to_skb() use build_skb when there's sufficient tailroom
          (21% improvement for 1000B UDP frames)
        - support XDP even without dedicated Tx queues - share the Tx
          queues with the stack when necessary

   - mlx5:
        - flow rules: add support for mirroring with conntrack, matching
          on ICMP, GTP, flex filters and more
        - support packet sampling with flow offloads
        - persist uplink representor netdev across eswitch mode changes
        - allow coexistence of CQE compression and HW time-stamping
        - add ethtool extended link error state reporting

   - ice, iavf: support flow filters, UDP Segmentation Offload

   - dpaa2-switch:
        - move the driver out of staging
        - add spanning tree (STP) support
        - add rx copybreak support
        - add tc flower hardware offload on ingress traffic

   - ionic:
        - implement Rx page reuse
        - support HW PTP time-stamping

   - octeon: support TC hardware offloads - flower matching on ingress
     and egress ratelimitting.

   - stmmac:
        - add RX frame steering based on VLAN priority in tc flower
        - support frame preemption (FPE)
        - intel: add cross time-stamping freq difference adjustment

   - ocelot:
        - support forwarding of MRP frames in HW
        - support multiple bridges
        - support PTP Sync one-step timestamping

   - dsa: mv88e6xxx, dpaa2-switch: offload bridge port flags like
     learning, flooding etc.

   - ipa: add IPA v4.5, v4.9 and v4.11 support (Qualcomm SDX55, SM8350,
     SC7280 SoCs)

   - mt7601u: enable TDLS support

   - mt76:
        - add support for 802.3 rx frames (mt7915/mt7615)
        - mt7915 flash pre-calibration support
        - mt7921/mt7663 runtime power management fixes"

* tag 'net-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2451 commits)
  net: selftest: fix build issue if INET is disabled
  net: netrom: nr_in: Remove redundant assignment to ns
  net: tun: Remove redundant assignment to ret
  net: phy: marvell: add downshift support for M88E1240
  net: dsa: ksz: Make reg_mib_cnt a u8 as it never exceeds 255
  net/sched: act_ct: Remove redundant ct get and check
  icmp: standardize naming of RFC 8335 PROBE constants
  bpf, selftests: Update array map tests for per-cpu batched ops
  bpf: Add batched ops support for percpu array
  bpf: Implement formatted output helpers with bstr_printf
  seq_file: Add a seq_bprintf function
  sfc: adjust efx->xdp_tx_queue_count with the real number of initialized queues
  net:nfc:digital: Fix a double free in digital_tg_recv_dep_req
  net: fix a concurrency bug in l2tp_tunnel_register()
  net/smc: Remove redundant assignment to rc
  mpls: Remove redundant assignment to err
  llc2: Remove redundant assignment to rc
  net/tls: Remove redundant initialization of record
  rds: Remove redundant assignment to nr_sig
  dt-bindings: net: mdio-gpio: add compatible for microchip,mdio-smi0
  ...

1 files changed, 95 insertions, 44 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/rl.c b/drivers/net/ethernet/mellanox/mlx5/core/rl.c
index 99039c47ef33..7161220afe30 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/rl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/rl.c
@@ -117,6 +117,9 @@ static struct mlx5_rl_entry *find_rl_entry(struct mlx5_rl_table *table,
 	bool empty_found = false;
 	int i;
 
+	lockdep_assert_held(&table->rl_lock);
+	WARN_ON(!table->rl_entry);
+
 	for (i = 0; i < table->max_size; i++) {
 		if (dedicated) {
 			if (!table->rl_entry[i].refcount)
@@ -172,38 +175,103 @@ bool mlx5_rl_are_equal(struct mlx5_rate_limit *rl_0,
 }
 EXPORT_SYMBOL(mlx5_rl_are_equal);
 
+static int mlx5_rl_table_get(struct mlx5_rl_table *table)
+{
+	int i;
+
+	lockdep_assert_held(&table->rl_lock);
+
+	if (table->rl_entry) {
+		table->refcount++;
+		return 0;
+	}
+
+	table->rl_entry = kcalloc(table->max_size, sizeof(struct mlx5_rl_entry),
+				  GFP_KERNEL);
+	if (!table->rl_entry)
+		return -ENOMEM;
+
+	/* The index represents the index in HW rate limit table
+	 * Index 0 is reserved for unlimited rate
+	 */
+	for (i = 0; i < table->max_size; i++)
+		table->rl_entry[i].index = i + 1;
+
+	table->refcount++;
+	return 0;
+}
+
+static void mlx5_rl_table_put(struct mlx5_rl_table *table)
+{
+	lockdep_assert_held(&table->rl_lock);
+	if (--table->refcount)
+		return;
+
+	kfree(table->rl_entry);
+	table->rl_entry = NULL;
+}
+
+static void mlx5_rl_table_free(struct mlx5_core_dev *dev, struct mlx5_rl_table *table)
+{
+	int i;
+
+	if (!table->rl_entry)
+		return;
+
+	/* Clear all configured rates */
+	for (i = 0; i < table->max_size; i++)
+		if (table->rl_entry[i].refcount)
+			mlx5_set_pp_rate_limit_cmd(dev, &table->rl_entry[i], false);
+	kfree(table->rl_entry);
+}
+
+static void mlx5_rl_entry_get(struct mlx5_rl_entry *entry)
+{
+	entry->refcount++;
+}
+
+static void
+mlx5_rl_entry_put(struct mlx5_core_dev *dev, struct mlx5_rl_entry *entry)
+{
+	entry->refcount--;
+	if (!entry->refcount)
+		mlx5_set_pp_rate_limit_cmd(dev, entry, false);
+}
+
 int mlx5_rl_add_rate_raw(struct mlx5_core_dev *dev, void *rl_in, u16 uid,
 			 bool dedicated_entry, u16 *index)
 {
 	struct mlx5_rl_table *table = &dev->priv.rl_table;
 	struct mlx5_rl_entry *entry;
-	int err = 0;
 	u32 rate;
+	int err;
 
-	rate = MLX5_GET(set_pp_rate_limit_context, rl_in, rate_limit);
-	mutex_lock(&table->rl_lock);
+	if (!table->max_size)
+		return -EOPNOTSUPP;
 
+	rate = MLX5_GET(set_pp_rate_limit_context, rl_in, rate_limit);
 	if (!rate || !mlx5_rl_is_in_range(dev, rate)) {
 		mlx5_core_err(dev, "Invalid rate: %u, should be %u to %u\n",
 			      rate, table->min_rate, table->max_rate);
-		err = -EINVAL;
-		goto out;
+		return -EINVAL;
 	}
 
+	mutex_lock(&table->rl_lock);
+	err = mlx5_rl_table_get(table);
+	if (err)
+		goto out;
+
 	entry = find_rl_entry(table, rl_in, uid, dedicated_entry);
 	if (!entry) {
 		mlx5_core_err(dev, "Max number of %u rates reached\n",
 			      table->max_size);
 		err = -ENOSPC;
-		goto out;
+		goto rl_err;
 	}
-	if (entry->refcount) {
-		/* rate already configured */
-		entry->refcount++;
-	} else {
+	if (!entry->refcount) {
+		/* new rate limit */
 		memcpy(entry->rl_raw, rl_in, sizeof(entry->rl_raw));
 		entry->uid = uid;
-		/* new rate limit */
 		err = mlx5_set_pp_rate_limit_cmd(dev, entry, true);
 		if (err) {
 			mlx5_core_err(
@@ -214,14 +282,18 @@ int mlx5_rl_add_rate_raw(struct mlx5_core_dev *dev, void *rl_in, u16 uid,
 					 burst_upper_bound),
 				MLX5_GET(set_pp_rate_limit_context, rl_in,
 					 typical_packet_size));
-			goto out;
+			goto rl_err;
 		}
 
-		entry->refcount = 1;
 		entry->dedicated = dedicated_entry;
 	}
+	mlx5_rl_entry_get(entry);
 	*index = entry->index;
+	mutex_unlock(&table->rl_lock);
+	return 0;
 
+rl_err:
+	mlx5_rl_table_put(table);
 out:
 	mutex_unlock(&table->rl_lock);
 	return err;
@@ -235,10 +307,8 @@ void mlx5_rl_remove_rate_raw(struct mlx5_core_dev *dev, u16 index)
 
 	mutex_lock(&table->rl_lock);
 	entry = &table->rl_entry[index - 1];
-	entry->refcount--;
-	if (!entry->refcount)
-		/* need to remove rate */
-		mlx5_set_pp_rate_limit_cmd(dev, entry, false);
+	mlx5_rl_entry_put(dev, entry);
+	mlx5_rl_table_put(table);
 	mutex_unlock(&table->rl_lock);
 }
 EXPORT_SYMBOL(mlx5_rl_remove_rate_raw);
@@ -286,12 +356,8 @@ void mlx5_rl_remove_rate(struct mlx5_core_dev *dev, struct mlx5_rate_limit *rl)
 			       rl->rate, rl->max_burst_sz, rl->typical_pkt_sz);
 		goto out;
 	}
-
-	entry->refcount--;
-	if (!entry->refcount)
-		/* need to remove rate */
-		mlx5_set_pp_rate_limit_cmd(dev, entry, false);
-
+	mlx5_rl_entry_put(dev, entry);
+	mlx5_rl_table_put(table);
 out:
 	mutex_unlock(&table->rl_lock);
 }
@@ -300,31 +366,19 @@ EXPORT_SYMBOL(mlx5_rl_remove_rate);
 int mlx5_init_rl_table(struct mlx5_core_dev *dev)
 {
 	struct mlx5_rl_table *table = &dev->priv.rl_table;
-	int i;
 
-	mutex_init(&table->rl_lock);
 	if (!MLX5_CAP_GEN(dev, qos) || !MLX5_CAP_QOS(dev, packet_pacing)) {
 		table->max_size = 0;
 		return 0;
 	}
 
+	mutex_init(&table->rl_lock);
+
 	/* First entry is reserved for unlimited rate */
 	table->max_size = MLX5_CAP_QOS(dev, packet_pacing_rate_table_size) - 1;
 	table->max_rate = MLX5_CAP_QOS(dev, packet_pacing_max_rate);
 	table->min_rate = MLX5_CAP_QOS(dev, packet_pacing_min_rate);
 
-	table->rl_entry = kcalloc(table->max_size, sizeof(struct mlx5_rl_entry),
-				  GFP_KERNEL);
-	if (!table->rl_entry)
-		return -ENOMEM;
-
-	/* The index represents the index in HW rate limit table
-	 * Index 0 is reserved for unlimited rate
-	 */
-	for (i = 0; i < table->max_size; i++)
-		table->rl_entry[i].index = i + 1;
-
-	/* Index 0 is reserved */
 	mlx5_core_info(dev, "Rate limit: %u rates are supported, range: %uMbps to %uMbps\n",
 		       table->max_size,
 		       table->min_rate >> 10,
@@ -336,13 +390,10 @@ int mlx5_init_rl_table(struct mlx5_core_dev *dev)
 void mlx5_cleanup_rl_table(struct mlx5_core_dev *dev)
 {
 	struct mlx5_rl_table *table = &dev->priv.rl_table;
-	int i;
 
-	/* Clear all configured rates */
-	for (i = 0; i < table->max_size; i++)
-		if (table->rl_entry[i].refcount)
-			mlx5_set_pp_rate_limit_cmd(dev, &table->rl_entry[i],
-						   false);
+	if (!MLX5_CAP_GEN(dev, qos) || !MLX5_CAP_QOS(dev, packet_pacing))
+		return;
 
-	kfree(dev->priv.rl_table.rl_entry);
+	mlx5_rl_table_free(dev, table);
+	mutex_destroy(&table->rl_lock);
 }