Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 475 insertions, 0 deletions

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_counter.c b/drivers/net/ethernet/marvell/prestera/prestera_counter.c
new file mode 100644
index 000000000..4cd53a2da
--- /dev/null
+++ b/drivers/net/ethernet/marvell/prestera/prestera_counter.c
@@ -0,0 +1,475 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/* Copyright (c) 2021 Marvell International Ltd. All rights reserved */
+
+#include "prestera.h"
+#include "prestera_hw.h"
+#include "prestera_acl.h"
+#include "prestera_counter.h"
+
+#define COUNTER_POLL_TIME	(msecs_to_jiffies(1000))
+#define COUNTER_RESCHED_TIME	(msecs_to_jiffies(50))
+#define COUNTER_BULK_SIZE	(256)
+
+struct prestera_counter {
+	struct prestera_switch *sw;
+	struct delayed_work stats_dw;
+	struct mutex mtx;  /* protect block_list */
+	struct prestera_counter_block **block_list;
+	u32 total_read;
+	u32 block_list_len;
+	u32 curr_idx;
+	bool is_fetching;
+};
+
+struct prestera_counter_block {
+	struct list_head list;
+	u32 id;
+	u32 offset;
+	u32 num_counters;
+	u32 client;
+	struct idr counter_idr;
+	refcount_t refcnt;
+	struct mutex mtx;  /* protect stats and counter_idr */
+	struct prestera_counter_stats *stats;
+	u8 *counter_flag;
+	bool is_updating;
+	bool full;
+};
+
+enum {
+	COUNTER_FLAG_READY = 0,
+	COUNTER_FLAG_INVALID = 1
+};
+
+static bool
+prestera_counter_is_ready(struct prestera_counter_block *block, u32 id)
+{
+	return block->counter_flag[id - block->offset] == COUNTER_FLAG_READY;
+}
+
+static void prestera_counter_lock(struct prestera_counter *counter)
+{
+	mutex_lock(&counter->mtx);
+}
+
+static void prestera_counter_unlock(struct prestera_counter *counter)
+{
+	mutex_unlock(&counter->mtx);
+}
+
+static void prestera_counter_block_lock(struct prestera_counter_block *block)
+{
+	mutex_lock(&block->mtx);
+}
+
+static void prestera_counter_block_unlock(struct prestera_counter_block *block)
+{
+	mutex_unlock(&block->mtx);
+}
+
+static bool prestera_counter_block_incref(struct prestera_counter_block *block)
+{
+	return refcount_inc_not_zero(&block->refcnt);
+}
+
+static bool prestera_counter_block_decref(struct prestera_counter_block *block)
+{
+	return refcount_dec_and_test(&block->refcnt);
+}
+
+/* must be called with prestera_counter_block_lock() */
+static void prestera_counter_stats_clear(struct prestera_counter_block *block,
+					 u32 counter_id)
+{
+	memset(&block->stats[counter_id - block->offset], 0,
+	       sizeof(*block->stats));
+}
+
+static struct prestera_counter_block *
+prestera_counter_block_lookup_not_full(struct prestera_counter *counter,
+				       u32 client)
+{
+	u32 i;
+
+	prestera_counter_lock(counter);
+	for (i = 0; i < counter->block_list_len; i++) {
+		if (counter->block_list[i] &&
+		    counter->block_list[i]->client == client &&
+		    !counter->block_list[i]->full &&
+		    prestera_counter_block_incref(counter->block_list[i])) {
+			prestera_counter_unlock(counter);
+			return counter->block_list[i];
+		}
+	}
+	prestera_counter_unlock(counter);
+
+	return NULL;
+}
+
+static int prestera_counter_block_list_add(struct prestera_counter *counter,
+					   struct prestera_counter_block *block)
+{
+	struct prestera_counter_block **arr;
+	u32 i;
+
+	prestera_counter_lock(counter);
+
+	for (i = 0; i < counter->block_list_len; i++) {
+		if (counter->block_list[i])
+			continue;
+
+		counter->block_list[i] = block;
+		prestera_counter_unlock(counter);
+		return 0;
+	}
+
+	arr = krealloc(counter->block_list, (counter->block_list_len + 1) *
+		       sizeof(*counter->block_list), GFP_KERNEL);
+	if (!arr) {
+		prestera_counter_unlock(counter);
+		return -ENOMEM;
+	}
+
+	counter->block_list = arr;
+	counter->block_list[counter->block_list_len] = block;
+	counter->block_list_len++;
+	prestera_counter_unlock(counter);
+	return 0;
+}
+
+static struct prestera_counter_block *
+prestera_counter_block_get(struct prestera_counter *counter, u32 client)
+{
+	struct prestera_counter_block *block;
+	int err;
+
+	block = prestera_counter_block_lookup_not_full(counter, client);
+	if (block)
+		return block;
+
+	block = kzalloc(sizeof(*block), GFP_KERNEL);
+	if (!block)
+		return ERR_PTR(-ENOMEM);
+
+	err = prestera_hw_counter_block_get(counter->sw, client,
+					    &block->id, &block->offset,
+					    &block->num_counters);
+	if (err)
+		goto err_block;
+
+	block->stats = kcalloc(block->num_counters,
+			       sizeof(*block->stats), GFP_KERNEL);
+	if (!block->stats) {
+		err = -ENOMEM;
+		goto err_stats;
+	}
+
+	block->counter_flag = kcalloc(block->num_counters,
+				      sizeof(*block->counter_flag),
+				      GFP_KERNEL);
+	if (!block->counter_flag) {
+		err = -ENOMEM;
+		goto err_flag;
+	}
+
+	block->client = client;
+	mutex_init(&block->mtx);
+	refcount_set(&block->refcnt, 1);
+	idr_init_base(&block->counter_idr, block->offset);
+
+	err = prestera_counter_block_list_add(counter, block);
+	if (err)
+		goto err_list_add;
+
+	return block;
+
+err_list_add:
+	idr_destroy(&block->counter_idr);
+	mutex_destroy(&block->mtx);
+	kfree(block->counter_flag);
+err_flag:
+	kfree(block->stats);
+err_stats:
+	prestera_hw_counter_block_release(counter->sw, block->id);
+err_block:
+	kfree(block);
+	return ERR_PTR(err);
+}
+
+static void prestera_counter_block_put(struct prestera_counter *counter,
+				       struct prestera_counter_block *block)
+{
+	u32 i;
+
+	if (!prestera_counter_block_decref(block))
+		return;
+
+	prestera_counter_lock(counter);
+	for (i = 0; i < counter->block_list_len; i++) {
+		if (counter->block_list[i] &&
+		    counter->block_list[i]->id == block->id) {
+			counter->block_list[i] = NULL;
+			break;
+		}
+	}
+	prestera_counter_unlock(counter);
+
+	WARN_ON(!idr_is_empty(&block->counter_idr));
+
+	prestera_hw_counter_block_release(counter->sw, block->id);
+	idr_destroy(&block->counter_idr);
+	mutex_destroy(&block->mtx);
+	kfree(block->stats);
+	kfree(block);
+}
+
+static int prestera_counter_get_vacant(struct prestera_counter_block *block,
+				       u32 *id)
+{
+	int free_id;
+
+	if (block->full)
+		return -ENOSPC;
+
+	prestera_counter_block_lock(block);
+	free_id = idr_alloc_cyclic(&block->counter_idr, NULL, block->offset,
+				   block->offset + block->num_counters,
+				   GFP_KERNEL);
+	if (free_id < 0) {
+		if (free_id == -ENOSPC)
+			block->full = true;
+
+		prestera_counter_block_unlock(block);
+		return free_id;
+	}
+	*id = free_id;
+	prestera_counter_block_unlock(block);
+
+	return 0;
+}
+
+int prestera_counter_get(struct prestera_counter *counter, u32 client,
+			 struct prestera_counter_block **bl, u32 *counter_id)
+{
+	struct prestera_counter_block *block;
+	int err;
+	u32 id;
+
+get_next_block:
+	block = prestera_counter_block_get(counter, client);
+	if (IS_ERR(block))
+		return PTR_ERR(block);
+
+	err = prestera_counter_get_vacant(block, &id);
+	if (err) {
+		prestera_counter_block_put(counter, block);
+
+		if (err == -ENOSPC)
+			goto get_next_block;
+
+		return err;
+	}
+
+	prestera_counter_block_lock(block);
+	if (block->is_updating)
+		block->counter_flag[id - block->offset] = COUNTER_FLAG_INVALID;
+	prestera_counter_block_unlock(block);
+
+	*counter_id = id;
+	*bl = block;
+
+	return 0;
+}
+
+void prestera_counter_put(struct prestera_counter *counter,
+			  struct prestera_counter_block *block, u32 counter_id)
+{
+	if (!block)
+		return;
+
+	prestera_counter_block_lock(block);
+	idr_remove(&block->counter_idr, counter_id);
+	block->full = false;
+	prestera_counter_stats_clear(block, counter_id);
+	prestera_counter_block_unlock(block);
+
+	prestera_hw_counter_clear(counter->sw, block->id, counter_id);
+	prestera_counter_block_put(counter, block);
+}
+
+static u32 prestera_counter_block_idx_next(struct prestera_counter *counter,
+					   u32 curr_idx)
+{
+	u32 idx, i, start = curr_idx + 1;
+
+	prestera_counter_lock(counter);
+	for (i = 0; i < counter->block_list_len; i++) {
+		idx = (start + i) % counter->block_list_len;
+		if (!counter->block_list[idx])
+			continue;
+
+		prestera_counter_unlock(counter);
+		return idx;
+	}
+	prestera_counter_unlock(counter);
+
+	return 0;
+}
+
+static struct prestera_counter_block *
+prestera_counter_block_get_by_idx(struct prestera_counter *counter, u32 idx)
+{
+	if (idx >= counter->block_list_len)
+		return NULL;
+
+	prestera_counter_lock(counter);
+
+	if (!counter->block_list[idx] ||
+	    !prestera_counter_block_incref(counter->block_list[idx])) {
+		prestera_counter_unlock(counter);
+		return NULL;
+	}
+
+	prestera_counter_unlock(counter);
+	return counter->block_list[idx];
+}
+
+static void prestera_counter_stats_work(struct work_struct *work)
+{
+	struct delayed_work *dl_work =
+		container_of(work, struct delayed_work, work);
+	struct prestera_counter *counter =
+		container_of(dl_work, struct prestera_counter, stats_dw);
+	struct prestera_counter_block *block;
+	u32 resched_time = COUNTER_POLL_TIME;
+	u32 count = COUNTER_BULK_SIZE;
+	bool done = false;
+	int err;
+	u32 i;
+
+	block = prestera_counter_block_get_by_idx(counter, counter->curr_idx);
+	if (!block) {
+		if (counter->is_fetching)
+			goto abort;
+
+		goto next;
+	}
+
+	if (!counter->is_fetching) {
+		err = prestera_hw_counter_trigger(counter->sw, block->id);
+		if (err)
+			goto abort;
+
+		prestera_counter_block_lock(block);
+		block->is_updating = true;
+		prestera_counter_block_unlock(block);
+
+		counter->is_fetching = true;
+		counter->total_read = 0;
+		resched_time = COUNTER_RESCHED_TIME;
+		goto resched;
+	}
+
+	prestera_counter_block_lock(block);
+	err = prestera_hw_counters_get(counter->sw, counter->total_read,
+				       &count, &done,
+				       &block->stats[counter->total_read]);
+	prestera_counter_block_unlock(block);
+	if (err)
+		goto abort;
+
+	counter->total_read += count;
+	if (!done || counter->total_read < block->num_counters) {
+		resched_time = COUNTER_RESCHED_TIME;
+		goto resched;
+	}
+
+	for (i = 0; i < block->num_counters; i++) {
+		if (block->counter_flag[i] == COUNTER_FLAG_INVALID) {
+			prestera_counter_block_lock(block);
+			block->counter_flag[i] = COUNTER_FLAG_READY;
+			memset(&block->stats[i], 0, sizeof(*block->stats));
+			prestera_counter_block_unlock(block);
+		}
+	}
+
+	prestera_counter_block_lock(block);
+	block->is_updating = false;
+	prestera_counter_block_unlock(block);
+
+	goto next;
+abort:
+	prestera_hw_counter_abort(counter->sw);
+next:
+	counter->is_fetching = false;
+	counter->curr_idx =
+		prestera_counter_block_idx_next(counter, counter->curr_idx);
+resched:
+	if (block)
+		prestera_counter_block_put(counter, block);
+
+	schedule_delayed_work(&counter->stats_dw, resched_time);
+}
+
+/* Can be executed without rtnl_lock().
+ * So pay attention when something changing.
+ */
+int prestera_counter_stats_get(struct prestera_counter *counter,
+			       struct prestera_counter_block *block,
+			       u32 counter_id, u64 *packets, u64 *bytes)
+{
+	if (!block || !prestera_counter_is_ready(block, counter_id)) {
+		*packets = 0;
+		*bytes = 0;
+		return 0;
+	}
+
+	prestera_counter_block_lock(block);
+	*packets = block->stats[counter_id - block->offset].packets;
+	*bytes = block->stats[counter_id - block->offset].bytes;
+
+	prestera_counter_stats_clear(block, counter_id);
+	prestera_counter_block_unlock(block);
+
+	return 0;
+}
+
+int prestera_counter_init(struct prestera_switch *sw)
+{
+	struct prestera_counter *counter;
+
+	counter = kzalloc(sizeof(*counter), GFP_KERNEL);
+	if (!counter)
+		return -ENOMEM;
+
+	counter->block_list = kzalloc(sizeof(*counter->block_list), GFP_KERNEL);
+	if (!counter->block_list) {
+		kfree(counter);
+		return -ENOMEM;
+	}
+
+	mutex_init(&counter->mtx);
+	counter->block_list_len = 1;
+	counter->sw = sw;
+	sw->counter = counter;
+
+	INIT_DELAYED_WORK(&counter->stats_dw, prestera_counter_stats_work);
+	schedule_delayed_work(&counter->stats_dw, COUNTER_POLL_TIME);
+
+	return 0;
+}
+
+void prestera_counter_fini(struct prestera_switch *sw)
+{
+	struct prestera_counter *counter = sw->counter;
+	u32 i;
+
+	cancel_delayed_work_sync(&counter->stats_dw);
+
+	for (i = 0; i < counter->block_list_len; i++)
+		WARN_ON(counter->block_list[i]);
+
+	mutex_destroy(&counter->mtx);
+	kfree(counter->block_list);
+	kfree(counter);
+}