438 lines
14 KiB
C
438 lines
14 KiB
C
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
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/* Copyright (C) 2017-2018 Netronome Systems, Inc. */
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#ifndef __NFP_FLOWER_H__
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#define __NFP_FLOWER_H__ 1
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#include "cmsg.h"
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#include "../nfp_net.h"
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#include <linux/circ_buf.h>
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#include <linux/hashtable.h>
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#include <linux/rhashtable.h>
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#include <linux/time64.h>
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#include <linux/types.h>
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#include <net/pkt_cls.h>
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#include <net/tcp.h>
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#include <linux/workqueue.h>
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#include <linux/idr.h>
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struct nfp_fl_pre_lag;
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struct net_device;
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struct nfp_app;
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#define NFP_FL_STAT_ID_MU_NUM GENMASK(31, 22)
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#define NFP_FL_STAT_ID_STAT GENMASK(21, 0)
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#define NFP_FL_STATS_ELEM_RS FIELD_SIZEOF(struct nfp_fl_stats_id, \
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init_unalloc)
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#define NFP_FLOWER_MASK_ENTRY_RS 256
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#define NFP_FLOWER_MASK_ELEMENT_RS 1
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#define NFP_FLOWER_MASK_HASH_BITS 10
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#define NFP_FL_META_FLAG_MANAGE_MASK BIT(7)
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#define NFP_FL_MASK_REUSE_TIME_NS 40000
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#define NFP_FL_MASK_ID_LOCATION 1
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/* Extra features bitmap. */
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#define NFP_FL_FEATS_GENEVE BIT(0)
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#define NFP_FL_NBI_MTU_SETTING BIT(1)
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#define NFP_FL_FEATS_GENEVE_OPT BIT(2)
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#define NFP_FL_FEATS_VLAN_PCP BIT(3)
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#define NFP_FL_FEATS_VF_RLIM BIT(4)
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#define NFP_FL_FEATS_FLOW_MOD BIT(5)
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#define NFP_FL_FEATS_PRE_TUN_RULES BIT(6)
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#define NFP_FL_FEATS_FLOW_MERGE BIT(30)
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#define NFP_FL_FEATS_LAG BIT(31)
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struct nfp_fl_mask_id {
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struct circ_buf mask_id_free_list;
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ktime_t *last_used;
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u8 init_unallocated;
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};
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struct nfp_fl_stats_id {
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struct circ_buf free_list;
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u32 init_unalloc;
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u8 repeated_em_count;
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};
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/**
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* struct nfp_fl_tunnel_offloads - priv data for tunnel offloads
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* @offloaded_macs: Hashtable of the offloaded MAC addresses
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* @ipv4_off_list: List of IPv4 addresses to offload
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* @neigh_off_list: List of neighbour offloads
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* @ipv4_off_lock: Lock for the IPv4 address list
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* @neigh_off_lock: Lock for the neighbour address list
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* @mac_off_ids: IDA to manage id assignment for offloaded MACs
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* @neigh_nb: Notifier to monitor neighbour state
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*/
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struct nfp_fl_tunnel_offloads {
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struct rhashtable offloaded_macs;
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struct list_head ipv4_off_list;
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struct list_head neigh_off_list;
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struct mutex ipv4_off_lock;
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spinlock_t neigh_off_lock;
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struct ida mac_off_ids;
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struct notifier_block neigh_nb;
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};
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/**
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* struct nfp_mtu_conf - manage MTU setting
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* @portnum: NFP port number of repr with requested MTU change
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* @requested_val: MTU value requested for repr
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* @ack: Received ack that MTU has been correctly set
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* @wait_q: Wait queue for MTU acknowledgements
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* @lock: Lock for setting/reading MTU variables
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*/
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struct nfp_mtu_conf {
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u32 portnum;
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unsigned int requested_val;
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bool ack;
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wait_queue_head_t wait_q;
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spinlock_t lock;
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};
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/**
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* struct nfp_fl_lag - Flower APP priv data for link aggregation
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* @work: Work queue for writing configs to the HW
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* @lock: Lock to protect lag_group_list
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* @group_list: List of all master/slave groups offloaded
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* @ida_handle: IDA to handle group ids
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* @pkt_num: Incremented for each config packet sent
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* @batch_ver: Incremented for each batch of config packets
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* @global_inst: Instance allocator for groups
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* @rst_cfg: Marker to reset HW LAG config
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* @retrans_skbs: Cmsgs that could not be processed by HW and require
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* retransmission
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*/
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struct nfp_fl_lag {
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struct delayed_work work;
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struct mutex lock;
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struct list_head group_list;
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struct ida ida_handle;
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unsigned int pkt_num;
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unsigned int batch_ver;
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u8 global_inst;
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bool rst_cfg;
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struct sk_buff_head retrans_skbs;
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};
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/**
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* struct nfp_fl_internal_ports - Flower APP priv data for additional ports
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* @port_ids: Assignment of ids to any additional ports
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* @lock: Lock for extra ports list
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*/
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struct nfp_fl_internal_ports {
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struct idr port_ids;
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spinlock_t lock;
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};
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/**
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* struct nfp_flower_priv - Flower APP per-vNIC priv data
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* @app: Back pointer to app
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* @nn: Pointer to vNIC
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* @mask_id_seed: Seed used for mask hash table
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* @flower_version: HW version of flower
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* @flower_ext_feats: Bitmap of extra features the HW supports
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* @stats_ids: List of free stats ids
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* @mask_ids: List of free mask ids
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* @mask_table: Hash table used to store masks
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* @stats_ring_size: Maximum number of allowed stats ids
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* @flow_table: Hash table used to store flower rules
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* @stats: Stored stats updates for flower rules
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* @stats_lock: Lock for flower rule stats updates
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* @stats_ctx_table: Hash table to map stats contexts to its flow rule
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* @cmsg_work: Workqueue for control messages processing
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* @cmsg_skbs_high: List of higher priority skbs for control message
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* processing
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* @cmsg_skbs_low: List of lower priority skbs for control message
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* processing
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* @tun: Tunnel offload data
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* @reify_replies: atomically stores the number of replies received
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* from firmware for repr reify
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* @reify_wait_queue: wait queue for repr reify response counting
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* @mtu_conf: Configuration of repr MTU value
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* @nfp_lag: Link aggregation data block
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* @indr_block_cb_priv: List of priv data passed to indirect block cbs
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* @non_repr_priv: List of offloaded non-repr ports and their priv data
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* @active_mem_unit: Current active memory unit for flower rules
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* @total_mem_units: Total number of available memory units for flower rules
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* @internal_ports: Internal port ids used in offloaded rules
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* @qos_stats_work: Workqueue for qos stats processing
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* @qos_rate_limiters: Current active qos rate limiters
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* @qos_stats_lock: Lock on qos stats updates
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* @pre_tun_rule_cnt: Number of pre-tunnel rules offloaded
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*/
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struct nfp_flower_priv {
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struct nfp_app *app;
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struct nfp_net *nn;
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u32 mask_id_seed;
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u64 flower_version;
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u64 flower_ext_feats;
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struct nfp_fl_stats_id stats_ids;
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struct nfp_fl_mask_id mask_ids;
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DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS);
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u32 stats_ring_size;
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struct rhashtable flow_table;
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struct nfp_fl_stats *stats;
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spinlock_t stats_lock; /* lock stats */
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struct rhashtable stats_ctx_table;
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struct work_struct cmsg_work;
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struct sk_buff_head cmsg_skbs_high;
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struct sk_buff_head cmsg_skbs_low;
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struct nfp_fl_tunnel_offloads tun;
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atomic_t reify_replies;
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wait_queue_head_t reify_wait_queue;
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struct nfp_mtu_conf mtu_conf;
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struct nfp_fl_lag nfp_lag;
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struct list_head indr_block_cb_priv;
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struct list_head non_repr_priv;
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unsigned int active_mem_unit;
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unsigned int total_mem_units;
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struct nfp_fl_internal_ports internal_ports;
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struct delayed_work qos_stats_work;
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unsigned int qos_rate_limiters;
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spinlock_t qos_stats_lock; /* Protect the qos stats */
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int pre_tun_rule_cnt;
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};
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/**
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* struct nfp_fl_qos - Flower APP priv data for quality of service
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* @netdev_port_id: NFP port number of repr with qos info
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* @curr_stats: Currently stored stats updates for qos info
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* @prev_stats: Previously stored updates for qos info
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* @last_update: Stored time when last stats were updated
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*/
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struct nfp_fl_qos {
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u32 netdev_port_id;
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struct nfp_stat_pair curr_stats;
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struct nfp_stat_pair prev_stats;
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u64 last_update;
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};
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/**
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* struct nfp_flower_repr_priv - Flower APP per-repr priv data
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* @nfp_repr: Back pointer to nfp_repr
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* @lag_port_flags: Extended port flags to record lag state of repr
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* @mac_offloaded: Flag indicating a MAC address is offloaded for repr
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* @offloaded_mac_addr: MAC address that has been offloaded for repr
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* @block_shared: Flag indicating if offload applies to shared blocks
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* @mac_list: List entry of reprs that share the same offloaded MAC
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* @qos_table: Stored info on filters implementing qos
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* @on_bridge: Indicates if the repr is attached to a bridge
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*/
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struct nfp_flower_repr_priv {
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struct nfp_repr *nfp_repr;
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unsigned long lag_port_flags;
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bool mac_offloaded;
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u8 offloaded_mac_addr[ETH_ALEN];
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bool block_shared;
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struct list_head mac_list;
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struct nfp_fl_qos qos_table;
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bool on_bridge;
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};
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/**
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* struct nfp_flower_non_repr_priv - Priv data for non-repr offloaded ports
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* @list: List entry of offloaded reprs
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* @netdev: Pointer to non-repr net_device
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* @ref_count: Number of references held for this priv data
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* @mac_offloaded: Flag indicating a MAC address is offloaded for device
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* @offloaded_mac_addr: MAC address that has been offloaded for dev
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*/
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struct nfp_flower_non_repr_priv {
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struct list_head list;
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struct net_device *netdev;
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int ref_count;
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bool mac_offloaded;
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u8 offloaded_mac_addr[ETH_ALEN];
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};
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struct nfp_fl_key_ls {
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u32 key_layer_two;
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u8 key_layer;
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int key_size;
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};
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struct nfp_fl_rule_metadata {
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u8 key_len;
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u8 mask_len;
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u8 act_len;
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u8 flags;
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__be32 host_ctx_id;
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__be64 host_cookie __packed;
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__be64 flow_version __packed;
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__be32 shortcut;
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};
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struct nfp_fl_stats {
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u64 pkts;
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u64 bytes;
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u64 used;
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};
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struct nfp_fl_payload {
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struct nfp_fl_rule_metadata meta;
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unsigned long tc_flower_cookie;
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struct rhash_head fl_node;
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struct rcu_head rcu;
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__be32 nfp_tun_ipv4_addr;
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struct net_device *ingress_dev;
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char *unmasked_data;
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char *mask_data;
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char *action_data;
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struct list_head linked_flows;
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bool in_hw;
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struct {
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struct net_device *dev;
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__be16 vlan_tci;
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__be16 port_idx;
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} pre_tun_rule;
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};
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struct nfp_fl_payload_link {
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/* A link contains a pointer to a merge flow and an associated sub_flow.
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* Each merge flow will feature in 2 links to its underlying sub_flows.
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* A sub_flow will have at least 1 link to a merge flow or more if it
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* has been used to create multiple merge flows.
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*
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* For a merge flow, 'linked_flows' in its nfp_fl_payload struct lists
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* all links to sub_flows (sub_flow.flow) via merge.list.
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* For a sub_flow, 'linked_flows' gives all links to merge flows it has
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* formed (merge_flow.flow) via sub_flow.list.
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*/
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struct {
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struct list_head list;
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struct nfp_fl_payload *flow;
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} merge_flow, sub_flow;
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};
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extern const struct rhashtable_params nfp_flower_table_params;
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struct nfp_fl_stats_frame {
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__be32 stats_con_id;
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__be32 pkt_count;
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__be64 byte_count;
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__be64 stats_cookie;
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};
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static inline bool
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nfp_flower_internal_port_can_offload(struct nfp_app *app,
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struct net_device *netdev)
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{
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struct nfp_flower_priv *app_priv = app->priv;
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if (!(app_priv->flower_ext_feats & NFP_FL_FEATS_FLOW_MERGE))
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return false;
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if (!netdev->rtnl_link_ops)
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return false;
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if (!strcmp(netdev->rtnl_link_ops->kind, "openvswitch"))
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return true;
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return false;
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}
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/* The address of the merged flow acts as its cookie.
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* Cookies supplied to us by TC flower are also addresses to allocated
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* memory and thus this scheme should not generate any collisions.
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*/
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static inline bool nfp_flower_is_merge_flow(struct nfp_fl_payload *flow_pay)
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{
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return flow_pay->tc_flower_cookie == (unsigned long)flow_pay;
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}
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static inline bool nfp_flower_is_supported_bridge(struct net_device *netdev)
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{
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return netif_is_ovs_master(netdev);
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}
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int nfp_flower_metadata_init(struct nfp_app *app, u64 host_ctx_count,
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unsigned int host_ctx_split);
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void nfp_flower_metadata_cleanup(struct nfp_app *app);
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int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
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enum tc_setup_type type, void *type_data);
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int nfp_flower_merge_offloaded_flows(struct nfp_app *app,
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struct nfp_fl_payload *sub_flow1,
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struct nfp_fl_payload *sub_flow2);
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int nfp_flower_compile_flow_match(struct nfp_app *app,
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struct flow_cls_offload *flow,
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struct nfp_fl_key_ls *key_ls,
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struct net_device *netdev,
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struct nfp_fl_payload *nfp_flow,
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enum nfp_flower_tun_type tun_type,
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struct netlink_ext_ack *extack);
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int nfp_flower_compile_action(struct nfp_app *app,
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struct flow_cls_offload *flow,
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struct net_device *netdev,
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struct nfp_fl_payload *nfp_flow,
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struct netlink_ext_ack *extack);
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int nfp_compile_flow_metadata(struct nfp_app *app,
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struct flow_cls_offload *flow,
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struct nfp_fl_payload *nfp_flow,
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struct net_device *netdev,
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struct netlink_ext_ack *extack);
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void __nfp_modify_flow_metadata(struct nfp_flower_priv *priv,
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struct nfp_fl_payload *nfp_flow);
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int nfp_modify_flow_metadata(struct nfp_app *app,
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struct nfp_fl_payload *nfp_flow);
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struct nfp_fl_payload *
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nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie,
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struct net_device *netdev);
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struct nfp_fl_payload *
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nfp_flower_get_fl_payload_from_ctx(struct nfp_app *app, u32 ctx_id);
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struct nfp_fl_payload *
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nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie);
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void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb);
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int nfp_tunnel_config_start(struct nfp_app *app);
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void nfp_tunnel_config_stop(struct nfp_app *app);
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int nfp_tunnel_mac_event_handler(struct nfp_app *app,
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struct net_device *netdev,
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unsigned long event, void *ptr);
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void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4);
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void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4);
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void nfp_tunnel_request_route(struct nfp_app *app, struct sk_buff *skb);
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void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb);
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void nfp_flower_lag_init(struct nfp_fl_lag *lag);
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void nfp_flower_lag_cleanup(struct nfp_fl_lag *lag);
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int nfp_flower_lag_reset(struct nfp_fl_lag *lag);
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int nfp_flower_lag_netdev_event(struct nfp_flower_priv *priv,
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struct net_device *netdev,
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unsigned long event, void *ptr);
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bool nfp_flower_lag_unprocessed_msg(struct nfp_app *app, struct sk_buff *skb);
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int nfp_flower_lag_populate_pre_action(struct nfp_app *app,
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struct net_device *master,
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struct nfp_fl_pre_lag *pre_act,
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struct netlink_ext_ack *extack);
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int nfp_flower_lag_get_output_id(struct nfp_app *app,
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struct net_device *master);
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void nfp_flower_qos_init(struct nfp_app *app);
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void nfp_flower_qos_cleanup(struct nfp_app *app);
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int nfp_flower_setup_qos_offload(struct nfp_app *app, struct net_device *netdev,
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struct tc_cls_matchall_offload *flow);
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void nfp_flower_stats_rlim_reply(struct nfp_app *app, struct sk_buff *skb);
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int nfp_flower_reg_indir_block_handler(struct nfp_app *app,
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struct net_device *netdev,
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unsigned long event);
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void
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__nfp_flower_non_repr_priv_get(struct nfp_flower_non_repr_priv *non_repr_priv);
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struct nfp_flower_non_repr_priv *
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nfp_flower_non_repr_priv_get(struct nfp_app *app, struct net_device *netdev);
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void
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__nfp_flower_non_repr_priv_put(struct nfp_flower_non_repr_priv *non_repr_priv);
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void
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nfp_flower_non_repr_priv_put(struct nfp_app *app, struct net_device *netdev);
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u32 nfp_flower_get_port_id_from_netdev(struct nfp_app *app,
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struct net_device *netdev);
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int nfp_flower_xmit_pre_tun_flow(struct nfp_app *app,
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struct nfp_fl_payload *flow);
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int nfp_flower_xmit_pre_tun_del_flow(struct nfp_app *app,
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struct nfp_fl_payload *flow);
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#endif
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