From 0a59975088d37f69815f656193c1e1e057feb494 Mon Sep 17 00:00:00 2001 From: Eli Cohen Date: Mon, 14 Nov 2022 15:17:59 +0200 Subject: vdpa/mlx5: Add RX counters to debugfs For each interface, either VLAN tagged or untagged, add two hardware counters: one for unicast and another for multicast. The counters count RX packets and bytes and can be read through debugfs: $ cat /sys/kernel/debug/mlx5/mlx5_core.sf.1/vdpa-0/rx/untagged/mcast/packets $ cat /sys/kernel/debug/mlx5/mlx5_core.sf.1/vdpa-0/rx/untagged/ucast/bytes This feature is controlled via the config option MLX5_VDPA_STEERING_DEBUG. It is off by default as it may have some impact on performance. includes a fixup By Yang Yingliang : vdpa/mlx5: fix check wrong pointer in mlx5_vdpa_add_mac_vlan_rules() The local variable 'rule' is not used anymore, fix return value check after calling mlx5_add_flow_rules(). Signed-off-by: Eli Cohen Message-Id: <20221114131759.57883-9-elic@nvidia.com> Signed-off-by: Michael S. Tsirkin Acked-by: Jason Wang Signed-off-by: Yang Yingliang Message-Id: <20230104074418.1737510-1-yangyingliang@huawei.com> Signed-off-by: Michael S. Tsirkin Acked-by: Eli Cohen Acked-by: Jason Wang --- drivers/vdpa/Kconfig | 12 ++++ drivers/vdpa/mlx5/net/debug.c | 86 +++++++++++++++++++++++++++ drivers/vdpa/mlx5/net/mlx5_vnet.c | 121 ++++++++++++++++++++++++++++---------- drivers/vdpa/mlx5/net/mlx5_vnet.h | 30 ++++++++++ 4 files changed, 219 insertions(+), 30 deletions(-) (limited to 'drivers/vdpa') diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig index 50f45d037611..43b716ec2d18 100644 --- a/drivers/vdpa/Kconfig +++ b/drivers/vdpa/Kconfig @@ -71,6 +71,18 @@ config MLX5_VDPA_NET be executed by the hardware. It also supports a variety of stateless offloads depending on the actual device used and firmware version. +config MLX5_VDPA_STEERING_DEBUG + bool "expose steering counters on debugfs" + select MLX5_VDPA + help + Expose RX steering counters in debugfs to aid in debugging. For each VLAN + or non VLAN interface, two hardware counters are added to the RX flow + table: one for unicast and one for multicast. + The counters counts the number of packets and bytes and exposes them in + debugfs. Once can read the counters using, e.g.: + cat /sys/kernel/debug/mlx5/mlx5_core.sf.1/vdpa-0/rx/untagged/ucast/packets + cat /sys/kernel/debug/mlx5/mlx5_core.sf.1/vdpa-0/rx/untagged/mcast/bytes + config VP_VDPA tristate "Virtio PCI bridge vDPA driver" select VIRTIO_PCI_LIB diff --git a/drivers/vdpa/mlx5/net/debug.c b/drivers/vdpa/mlx5/net/debug.c index 95e4801df211..60d6ac68cdc4 100644 --- a/drivers/vdpa/mlx5/net/debug.c +++ b/drivers/vdpa/mlx5/net/debug.c @@ -49,6 +49,92 @@ void mlx5_vdpa_add_rx_flow_table(struct mlx5_vdpa_net *ndev) ndev, &rx_flow_table_fops); } +#if defined(CONFIG_MLX5_VDPA_STEERING_DEBUG) +static int packets_show(struct seq_file *file, void *priv) +{ + struct mlx5_vdpa_counter *counter = file->private; + u64 packets; + u64 bytes; + int err; + + err = mlx5_fc_query(counter->mdev, counter->counter, &packets, &bytes); + if (err) + return err; + + seq_printf(file, "0x%llx\n", packets); + return 0; +} + +static int bytes_show(struct seq_file *file, void *priv) +{ + struct mlx5_vdpa_counter *counter = file->private; + u64 packets; + u64 bytes; + int err; + + err = mlx5_fc_query(counter->mdev, counter->counter, &packets, &bytes); + if (err) + return err; + + seq_printf(file, "0x%llx\n", bytes); + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(packets); +DEFINE_SHOW_ATTRIBUTE(bytes); + +static void add_counter_node(struct mlx5_vdpa_counter *counter, + struct dentry *parent) +{ + debugfs_create_file("packets", 0444, parent, counter, + &packets_fops); + debugfs_create_file("bytes", 0444, parent, counter, + &bytes_fops); +} + +void mlx5_vdpa_add_rx_counters(struct mlx5_vdpa_net *ndev, + struct macvlan_node *node) +{ + static const char *ut = "untagged"; + char vidstr[9]; + u16 vid; + + node->ucast_counter.mdev = ndev->mvdev.mdev; + node->mcast_counter.mdev = ndev->mvdev.mdev; + if (node->tagged) { + vid = key2vid(node->macvlan); + snprintf(vidstr, sizeof(vidstr), "0x%x", vid); + } else { + strcpy(vidstr, ut); + } + + node->dent = debugfs_create_dir(vidstr, ndev->rx_dent); + if (IS_ERR(node->dent)) { + node->dent = NULL; + return; + } + + node->ucast_counter.dent = debugfs_create_dir("ucast", node->dent); + if (IS_ERR(node->ucast_counter.dent)) + return; + + add_counter_node(&node->ucast_counter, node->ucast_counter.dent); + + node->mcast_counter.dent = debugfs_create_dir("mcast", node->dent); + if (IS_ERR(node->mcast_counter.dent)) + return; + + add_counter_node(&node->mcast_counter, node->mcast_counter.dent); +} + +void mlx5_vdpa_remove_rx_counters(struct mlx5_vdpa_net *ndev, + struct macvlan_node *node) +{ + if (node->dent && ndev->debugfs) + debugfs_remove_recursive(node->dent); +} +#endif + void mlx5_vdpa_add_debugfs(struct mlx5_vdpa_net *ndev) { struct mlx5_core_dev *mdev; diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c index 4b097e6ddba0..75f800685677 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c @@ -1404,25 +1404,69 @@ static void destroy_tir(struct mlx5_vdpa_net *ndev) #define MAX_STEERING_ENT 0x8000 #define MAX_STEERING_GROUPS 2 +#if defined(CONFIG_MLX5_VDPA_STEERING_DEBUG) + #define NUM_DESTS 2 +#else + #define NUM_DESTS 1 +#endif + +static int add_steering_counters(struct mlx5_vdpa_net *ndev, + struct macvlan_node *node, + struct mlx5_flow_act *flow_act, + struct mlx5_flow_destination *dests) +{ +#if defined(CONFIG_MLX5_VDPA_STEERING_DEBUG) + int err; + + node->ucast_counter.counter = mlx5_fc_create(ndev->mvdev.mdev, false); + if (IS_ERR(node->ucast_counter.counter)) + return PTR_ERR(node->ucast_counter.counter); + + node->mcast_counter.counter = mlx5_fc_create(ndev->mvdev.mdev, false); + if (IS_ERR(node->mcast_counter.counter)) { + err = PTR_ERR(node->mcast_counter.counter); + goto err_mcast_counter; + } + + dests[1].type = MLX5_FLOW_DESTINATION_TYPE_COUNTER; + flow_act->action |= MLX5_FLOW_CONTEXT_ACTION_COUNT; + return 0; + +err_mcast_counter: + mlx5_fc_destroy(ndev->mvdev.mdev, node->ucast_counter.counter); + return err; +#else + return 0; +#endif +} + +static void remove_steering_counters(struct mlx5_vdpa_net *ndev, + struct macvlan_node *node) +{ +#if defined(CONFIG_MLX5_VDPA_STEERING_DEBUG) + mlx5_fc_destroy(ndev->mvdev.mdev, node->mcast_counter.counter); + mlx5_fc_destroy(ndev->mvdev.mdev, node->ucast_counter.counter); +#endif +} + static int mlx5_vdpa_add_mac_vlan_rules(struct mlx5_vdpa_net *ndev, u8 *mac, - u16 vid, bool tagged, - struct mlx5_flow_handle **ucast, - struct mlx5_flow_handle **mcast) + struct macvlan_node *node) { - struct mlx5_flow_destination dest = {}; + struct mlx5_flow_destination dests[NUM_DESTS] = {}; struct mlx5_flow_act flow_act = {}; - struct mlx5_flow_handle *rule; struct mlx5_flow_spec *spec; void *headers_c; void *headers_v; u8 *dmac_c; u8 *dmac_v; int err; + u16 vid; spec = kvzalloc(sizeof(*spec), GFP_KERNEL); if (!spec) return -ENOMEM; + vid = key2vid(node->macvlan); spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS; headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, outer_headers); headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, outer_headers); @@ -1434,44 +1478,58 @@ static int mlx5_vdpa_add_mac_vlan_rules(struct mlx5_vdpa_net *ndev, u8 *mac, MLX5_SET(fte_match_set_lyr_2_4, headers_c, cvlan_tag, 1); MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, first_vid); } - if (tagged) { + if (node->tagged) { MLX5_SET(fte_match_set_lyr_2_4, headers_v, cvlan_tag, 1); MLX5_SET(fte_match_set_lyr_2_4, headers_v, first_vid, vid); } flow_act.action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST; - dest.type = MLX5_FLOW_DESTINATION_TYPE_TIR; - dest.tir_num = ndev->res.tirn; - rule = mlx5_add_flow_rules(ndev->rxft, spec, &flow_act, &dest, 1); - if (IS_ERR(rule)) - return PTR_ERR(rule); + dests[0].type = MLX5_FLOW_DESTINATION_TYPE_TIR; + dests[0].tir_num = ndev->res.tirn; + err = add_steering_counters(ndev, node, &flow_act, dests); + if (err) + goto out_free; - *ucast = rule; +#if defined(CONFIG_MLX5_VDPA_STEERING_DEBUG) + dests[1].counter_id = mlx5_fc_id(node->ucast_counter.counter); +#endif + node->ucast_rule = mlx5_add_flow_rules(ndev->rxft, spec, &flow_act, dests, NUM_DESTS); + if (IS_ERR(node->ucast_rule)) { + err = PTR_ERR(node->ucast_rule); + goto err_ucast; + } + +#if defined(CONFIG_MLX5_VDPA_STEERING_DEBUG) + dests[1].counter_id = mlx5_fc_id(node->mcast_counter.counter); +#endif memset(dmac_c, 0, ETH_ALEN); memset(dmac_v, 0, ETH_ALEN); dmac_c[0] = 1; dmac_v[0] = 1; - rule = mlx5_add_flow_rules(ndev->rxft, spec, &flow_act, &dest, 1); - kvfree(spec); - if (IS_ERR(rule)) { - err = PTR_ERR(rule); + node->mcast_rule = mlx5_add_flow_rules(ndev->rxft, spec, &flow_act, dests, NUM_DESTS); + if (IS_ERR(node->mcast_rule)) { + err = PTR_ERR(node->mcast_rule); goto err_mcast; } - - *mcast = rule; + kvfree(spec); + mlx5_vdpa_add_rx_counters(ndev, node); return 0; err_mcast: - mlx5_del_flow_rules(*ucast); + mlx5_del_flow_rules(node->ucast_rule); +err_ucast: + remove_steering_counters(ndev, node); +out_free: + kvfree(spec); return err; } static void mlx5_vdpa_del_mac_vlan_rules(struct mlx5_vdpa_net *ndev, - struct mlx5_flow_handle *ucast, - struct mlx5_flow_handle *mcast) + struct macvlan_node *node) { - mlx5_del_flow_rules(ucast); - mlx5_del_flow_rules(mcast); + mlx5_vdpa_remove_rx_counters(ndev, node); + mlx5_del_flow_rules(node->ucast_rule); + mlx5_del_flow_rules(node->mcast_rule); } static u64 search_val(u8 *mac, u16 vlan, bool tagged) @@ -1505,14 +1563,14 @@ static struct macvlan_node *mac_vlan_lookup(struct mlx5_vdpa_net *ndev, u64 valu return NULL; } -static int mac_vlan_add(struct mlx5_vdpa_net *ndev, u8 *mac, u16 vlan, bool tagged) // vlan -> vid +static int mac_vlan_add(struct mlx5_vdpa_net *ndev, u8 *mac, u16 vid, bool tagged) { struct macvlan_node *ptr; u64 val; u32 idx; int err; - val = search_val(mac, vlan, tagged); + val = search_val(mac, vid, tagged); if (mac_vlan_lookup(ndev, val)) return -EEXIST; @@ -1520,12 +1578,13 @@ static int mac_vlan_add(struct mlx5_vdpa_net *ndev, u8 *mac, u16 vlan, bool tagg if (!ptr) return -ENOMEM; - err = mlx5_vdpa_add_mac_vlan_rules(ndev, ndev->config.mac, vlan, tagged, - &ptr->ucast_rule, &ptr->mcast_rule); + ptr->tagged = tagged; + ptr->macvlan = val; + ptr->ndev = ndev; + err = mlx5_vdpa_add_mac_vlan_rules(ndev, ndev->config.mac, ptr); if (err) goto err_add; - ptr->macvlan = val; idx = hash_64(val, 8); hlist_add_head(&ptr->hlist, &ndev->macvlan_hash[idx]); return 0; @@ -1544,7 +1603,8 @@ static void mac_vlan_del(struct mlx5_vdpa_net *ndev, u8 *mac, u16 vlan, bool tag return; hlist_del(&ptr->hlist); - mlx5_vdpa_del_mac_vlan_rules(ndev, ptr->ucast_rule, ptr->mcast_rule); + mlx5_vdpa_del_mac_vlan_rules(ndev, ptr); + remove_steering_counters(ndev, ptr); kfree(ptr); } @@ -1557,7 +1617,8 @@ static void clear_mac_vlan_table(struct mlx5_vdpa_net *ndev) for (i = 0; i < MLX5V_MACVLAN_SIZE; i++) { hlist_for_each_entry_safe(pos, n, &ndev->macvlan_hash[i], hlist) { hlist_del(&pos->hlist); - mlx5_vdpa_del_mac_vlan_rules(ndev, pos->ucast_rule, pos->mcast_rule); + mlx5_vdpa_del_mac_vlan_rules(ndev, pos); + remove_steering_counters(ndev, pos); kfree(pos); } } diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.h b/drivers/vdpa/mlx5/net/mlx5_vnet.h index f2cef3925e5b..c90a89e1de4d 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.h +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.h @@ -21,6 +21,11 @@ struct mlx5_vdpa_net_resources { #define MLX5V_MACVLAN_SIZE 256 +static inline u16 key2vid(u64 key) +{ + return (u16)(key >> 48) & 0xfff; +} + struct mlx5_vdpa_net { struct mlx5_vdpa_dev mvdev; struct mlx5_vdpa_net_resources res; @@ -47,11 +52,24 @@ struct mlx5_vdpa_net { struct dentry *debugfs; }; +struct mlx5_vdpa_counter { + struct mlx5_fc *counter; + struct dentry *dent; + struct mlx5_core_dev *mdev; +}; + struct macvlan_node { struct hlist_node hlist; struct mlx5_flow_handle *ucast_rule; struct mlx5_flow_handle *mcast_rule; u64 macvlan; + struct mlx5_vdpa_net *ndev; + bool tagged; +#if defined(CONFIG_MLX5_VDPA_STEERING_DEBUG) + struct dentry *dent; + struct mlx5_vdpa_counter ucast_counter; + struct mlx5_vdpa_counter mcast_counter; +#endif }; void mlx5_vdpa_add_debugfs(struct mlx5_vdpa_net *ndev); @@ -60,5 +78,17 @@ void mlx5_vdpa_add_rx_flow_table(struct mlx5_vdpa_net *ndev); void mlx5_vdpa_remove_rx_flow_table(struct mlx5_vdpa_net *ndev); void mlx5_vdpa_add_tirn(struct mlx5_vdpa_net *ndev); void mlx5_vdpa_remove_tirn(struct mlx5_vdpa_net *ndev); +#if defined(CONFIG_MLX5_VDPA_STEERING_DEBUG) +void mlx5_vdpa_add_rx_counters(struct mlx5_vdpa_net *ndev, + struct macvlan_node *node); +void mlx5_vdpa_remove_rx_counters(struct mlx5_vdpa_net *ndev, + struct macvlan_node *node); +#else +static inline void mlx5_vdpa_add_rx_counters(struct mlx5_vdpa_net *ndev, + struct macvlan_node *node) {} +static inline void mlx5_vdpa_remove_rx_counters(struct mlx5_vdpa_net *ndev, + struct macvlan_node *node) {} +#endif + #endif /* __MLX5_VNET_H__ */ -- cgit v1.2.3