Merge branch 'mlxsw-spectrum_cnt-Expose-counter-resources'

Ido Schimmel says:

====================
mlxsw: spectrum_cnt: Expose counter resources

Jiri says:

Capacity and utilization of existing flow and RIF counters are currently
unavailable to be seen by the user. Use the existing devlink resources
API to expose the information:

$ sudo devlink resource show pci/0000:00:10.0 -v
pci/0000:00:10.0:
  name kvd resource_path /kvd size 524288 unit entry dpipe_tables none
  name span_agents resource_path /span_agents size 8 occ 0 unit entry dpipe_tables none
  name counters resource_path /counters size 79872 occ 44 unit entry dpipe_tables none
    resources:
      name flow resource_path /counters/flow size 61440 occ 4 unit entry dpipe_tables none
      name rif resource_path /counters/rif size 18432 occ 40 unit entry dpipe_tables none
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/resources.h

@@ -18,6 +18,7 @@ enum mlxsw_res_id {
 	MLXSW_RES_ID_CQE_V1,
 	MLXSW_RES_ID_CQE_V2,
 	MLXSW_RES_ID_COUNTER_POOL_SIZE,
+	MLXSW_RES_ID_COUNTER_BANK_SIZE,
 	MLXSW_RES_ID_MAX_SPAN,
 	MLXSW_RES_ID_COUNTER_SIZE_PACKETS_BYTES,
 	MLXSW_RES_ID_COUNTER_SIZE_ROUTER_BASIC,
@@ -75,6 +76,7 @@ static u16 mlxsw_res_ids[] = {
 	[MLXSW_RES_ID_CQE_V1] = 0x2211,
 	[MLXSW_RES_ID_CQE_V2] = 0x2212,
 	[MLXSW_RES_ID_COUNTER_POOL_SIZE] = 0x2410,
+	[MLXSW_RES_ID_COUNTER_BANK_SIZE] = 0x2411,
 	[MLXSW_RES_ID_MAX_SPAN] = 0x2420,
 	[MLXSW_RES_ID_COUNTER_SIZE_PACKETS_BYTES] = 0x2443,
 	[MLXSW_RES_ID_COUNTER_SIZE_ROUTER_BASIC] = 0x2449,

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -5421,8 +5421,13 @@ static int mlxsw_sp1_resources_register(struct mlxsw_core *mlxsw_core)
 	if (err)
 		goto err_resources_span_register;
 
+	err = mlxsw_sp_counter_resources_register(mlxsw_core);
+	if (err)
+		goto err_resources_counter_register;
+
 	return 0;
 
+err_resources_counter_register:
 err_resources_span_register:
 	devlink_resources_unregister(priv_to_devlink(mlxsw_core), NULL);
 	return err;
@@ -5440,8 +5445,13 @@ static int mlxsw_sp2_resources_register(struct mlxsw_core *mlxsw_core)
 	if (err)
 		goto err_resources_span_register;
 
+	err = mlxsw_sp_counter_resources_register(mlxsw_core);
+	if (err)
+		goto err_resources_counter_register;
+
 	return 0;
 
+err_resources_counter_register:
 err_resources_span_register:
 	devlink_resources_unregister(priv_to_devlink(mlxsw_core), NULL);
 	return err;

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -46,6 +46,10 @@
 
 #define MLXSW_SP_RESOURCE_NAME_SPAN "span_agents"
 
+#define MLXSW_SP_RESOURCE_NAME_COUNTERS "counters"
+#define MLXSW_SP_RESOURCE_NAME_COUNTERS_FLOW "flow"
+#define MLXSW_SP_RESOURCE_NAME_COUNTERS_RIF "rif"
+
 enum mlxsw_sp_resource_id {
 	MLXSW_SP_RESOURCE_KVD = 1,
 	MLXSW_SP_RESOURCE_KVD_LINEAR,
@@ -55,6 +59,9 @@ enum mlxsw_sp_resource_id {
 	MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS,
 	MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS,
 	MLXSW_SP_RESOURCE_SPAN,
+	MLXSW_SP_RESOURCE_COUNTERS,
+	MLXSW_SP_RESOURCE_COUNTERS_FLOW,
+	MLXSW_SP_RESOURCE_COUNTERS_RIF,
 };
 
 struct mlxsw_sp_port;

drivers/net/ethernet/mellanox/mlxsw/spectrum_cnt.h

@@ -4,6 +4,7 @@
 #ifndef _MLXSW_SPECTRUM_CNT_H
 #define _MLXSW_SPECTRUM_CNT_H
 
+#include "core.h"
 #include "spectrum.h"
 
 enum mlxsw_sp_counter_sub_pool_id {
@@ -19,5 +20,6 @@ void mlxsw_sp_counter_free(struct mlxsw_sp *mlxsw_sp,
 			   unsigned int counter_index);
 int mlxsw_sp_counter_pool_init(struct mlxsw_sp *mlxsw_sp);
 void mlxsw_sp_counter_pool_fini(struct mlxsw_sp *mlxsw_sp);
+int mlxsw_sp_counter_resources_register(struct mlxsw_core *mlxsw_core);
 
 #endif

tools/testing/selftests/drivers/net/mlxsw/spectrum-2/tc_flower_scale.sh

@@ -8,9 +8,9 @@ tc_flower_get_target()
 	# The driver associates a counter with each tc filter, which means the
 	# number of supported filters is bounded by the number of available
 	# counters.
-	# Currently, the driver supports 12K (12,288) flow counters and six of
+	# Currently, the driver supports 30K (30,720) flow counters and six of
 	# these are used for multicast routing.
-	local target=12282
+	local target=30714
 
 	if ((! should_fail)); then
 		echo $target

tools/testing/selftests/drivers/net/mlxsw/tc_action_hw_stats.sh

+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="
+	default_hw_stats_test
+	immediate_hw_stats_test
+	delayed_hw_stats_test
+	disabled_hw_stats_test
+"
+NUM_NETIFS=2
+
+source $lib_dir/tc_common.sh
+source $lib_dir/lib.sh
+source $lib_dir/devlink_lib.sh
+
+h1_create()
+{
+	simple_if_init $h1 192.0.2.1/24
+}
+
+h1_destroy()
+{
+	simple_if_fini $h1 192.0.2.1/24
+}
+
+switch_create()
+{
+	simple_if_init $swp1 192.0.2.2/24
+	tc qdisc add dev $swp1 clsact
+}
+
+switch_destroy()
+{
+	tc qdisc del dev $swp1 clsact
+	simple_if_fini $swp1 192.0.2.2/24
+}
+
+hw_stats_test()
+{
+	RET=0
+
+	local name=$1
+	local action_hw_stats=$2
+	local occ_delta=$3
+	local expected_packet_count=$4
+
+	local orig_occ=$(devlink_resource_get "counters" "flow" | jq '.["occ"]')
+
+	tc filter add dev $swp1 ingress protocol ip pref 1 handle 101 flower \
+		skip_sw dst_ip 192.0.2.2 action drop $action_hw_stats
+	check_err $? "Failed to add rule with $name hw_stats"
+
+	local new_occ=$(devlink_resource_get "counters" "flow" | jq '.["occ"]')
+	local expected_occ=$((orig_occ + occ_delta))
+	[ "$new_occ" == "$expected_occ" ]
+	check_err $? "Expected occupancy of $expected_occ, got $new_occ"
+
+	$MZ $h1 -c 1 -p 64 -a $h1mac -b $swp1mac -A 192.0.2.1 -B 192.0.2.2 \
+		-t ip -q
+
+	tc_check_packets "dev $swp1 ingress" 101 $expected_packet_count
+	check_err $? "Did not match incoming packet"
+
+	tc filter del dev $swp1 ingress protocol ip pref 1 handle 101 flower
+
+	log_test "$name hw_stats"
+}
+
+default_hw_stats_test()
+{
+	hw_stats_test "default" "" 2 1
+}
+
+immediate_hw_stats_test()
+{
+	hw_stats_test "immediate" "hw_stats immediate" 2 1
+}
+
+delayed_hw_stats_test()
+{
+	RET=0
+
+	tc filter add dev $swp1 ingress protocol ip pref 1 handle 101 flower \
+		skip_sw dst_ip 192.0.2.2 action drop hw_stats delayed
+	check_fail $? "Unexpected success in adding rule with delayed hw_stats"
+
+	log_test "delayed hw_stats"
+}
+
+disabled_hw_stats_test()
+{
+	hw_stats_test "disabled" "hw_stats disabled" 0 0
+}
+
+setup_prepare()
+{
+	h1=${NETIFS[p1]}
+	swp1=${NETIFS[p2]}
+
+	h1mac=$(mac_get $h1)
+	swp1mac=$(mac_get $swp1)
+
+	vrf_prepare
+
+	h1_create
+	switch_create
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	switch_destroy
+	h1_destroy
+
+	vrf_cleanup
+}
+
+check_tc_action_hw_stats_support
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS

tools/testing/selftests/net/forwarding/lib.sh

@@ -60,6 +60,15 @@ check_tc_chain_support()
 	fi
 }
 
+check_tc_action_hw_stats_support()
+{
+	tc actions help 2>&1 | grep -q hw_stats
+	if [[ $? -ne 0 ]]; then
+		echo "SKIP: iproute2 too old; tc is missing action hw_stats support"
+		exit 1
+	fi
+}
+
 if [[ "$(id -u)" -ne 0 ]]; then
 	echo "SKIP: need root privileges"
 	exit 0