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a155-U-u1/kernel-5.10/drivers/net/ethernet/netronome/nfp/flower/main.h
physwizz 99537be4e2 first
2024-03-11 06:53:12 +11:00

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/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
/* Copyright (C) 2017-2018 Netronome Systems, Inc. */
#ifndef __NFP_FLOWER_H__
#define __NFP_FLOWER_H__ 1
#include "cmsg.h"
#include "../nfp_net.h"
#include <linux/circ_buf.h>
#include <linux/hashtable.h>
#include <linux/rhashtable.h>
#include <linux/time64.h>
#include <linux/types.h>
#include <net/pkt_cls.h>
#include <net/tcp.h>
#include <linux/workqueue.h>
#include <linux/idr.h>
struct nfp_fl_pre_lag;
struct net_device;
struct nfp_app;
#define NFP_FL_STAT_ID_MU_NUM GENMASK(31, 22)
#define NFP_FL_STAT_ID_STAT GENMASK(21, 0)
#define NFP_FL_STATS_ELEM_RS sizeof_field(struct nfp_fl_stats_id, \
init_unalloc)
#define NFP_FLOWER_MASK_ENTRY_RS 256
#define NFP_FLOWER_MASK_ELEMENT_RS 1
#define NFP_FLOWER_MASK_HASH_BITS 10
#define NFP_FLOWER_KEY_MAX_LW 32
#define NFP_FL_META_FLAG_MANAGE_MASK BIT(7)
#define NFP_FL_MASK_REUSE_TIME_NS 40000
#define NFP_FL_MASK_ID_LOCATION 1
/* Extra features bitmap. */
#define NFP_FL_FEATS_GENEVE BIT(0)
#define NFP_FL_NBI_MTU_SETTING BIT(1)
#define NFP_FL_FEATS_GENEVE_OPT BIT(2)
#define NFP_FL_FEATS_VLAN_PCP BIT(3)
#define NFP_FL_FEATS_VF_RLIM BIT(4)
#define NFP_FL_FEATS_FLOW_MOD BIT(5)
#define NFP_FL_FEATS_PRE_TUN_RULES BIT(6)
#define NFP_FL_FEATS_IPV6_TUN BIT(7)
#define NFP_FL_FEATS_VLAN_QINQ BIT(8)
#define NFP_FL_FEATS_HOST_ACK BIT(31)
#define NFP_FL_ENABLE_FLOW_MERGE BIT(0)
#define NFP_FL_ENABLE_LAG BIT(1)
#define NFP_FL_FEATS_HOST \
(NFP_FL_FEATS_GENEVE | \
NFP_FL_NBI_MTU_SETTING | \
NFP_FL_FEATS_GENEVE_OPT | \
NFP_FL_FEATS_VLAN_PCP | \
NFP_FL_FEATS_VF_RLIM | \
NFP_FL_FEATS_FLOW_MOD | \
NFP_FL_FEATS_PRE_TUN_RULES | \
NFP_FL_FEATS_IPV6_TUN | \
NFP_FL_FEATS_VLAN_QINQ)
struct nfp_fl_mask_id {
struct circ_buf mask_id_free_list;
ktime_t *last_used;
u8 init_unallocated;
};
struct nfp_fl_stats_id {
struct circ_buf free_list;
u32 init_unalloc;
u8 repeated_em_count;
};
/**
* struct nfp_fl_tunnel_offloads - priv data for tunnel offloads
* @offloaded_macs: Hashtable of the offloaded MAC addresses
* @ipv4_off_list: List of IPv4 addresses to offload
* @ipv6_off_list: List of IPv6 addresses to offload
* @neigh_off_list_v4: List of IPv4 neighbour offloads
* @neigh_off_list_v6: List of IPv6 neighbour offloads
* @ipv4_off_lock: Lock for the IPv4 address list
* @ipv6_off_lock: Lock for the IPv6 address list
* @neigh_off_lock_v4: Lock for the IPv4 neighbour address list
* @neigh_off_lock_v6: Lock for the IPv6 neighbour address list
* @mac_off_ids: IDA to manage id assignment for offloaded MACs
* @neigh_nb: Notifier to monitor neighbour state
*/
struct nfp_fl_tunnel_offloads {
struct rhashtable offloaded_macs;
struct list_head ipv4_off_list;
struct list_head ipv6_off_list;
struct list_head neigh_off_list_v4;
struct list_head neigh_off_list_v6;
struct mutex ipv4_off_lock;
struct mutex ipv6_off_lock;
spinlock_t neigh_off_lock_v4;
spinlock_t neigh_off_lock_v6;
struct ida mac_off_ids;
struct notifier_block neigh_nb;
};
/**
* struct nfp_mtu_conf - manage MTU setting
* @portnum: NFP port number of repr with requested MTU change
* @requested_val: MTU value requested for repr
* @ack: Received ack that MTU has been correctly set
* @wait_q: Wait queue for MTU acknowledgements
* @lock: Lock for setting/reading MTU variables
*/
struct nfp_mtu_conf {
u32 portnum;
unsigned int requested_val;
bool ack;
wait_queue_head_t wait_q;
spinlock_t lock;
};
/**
* struct nfp_fl_lag - Flower APP priv data for link aggregation
* @work: Work queue for writing configs to the HW
* @lock: Lock to protect lag_group_list
* @group_list: List of all master/slave groups offloaded
* @ida_handle: IDA to handle group ids
* @pkt_num: Incremented for each config packet sent
* @batch_ver: Incremented for each batch of config packets
* @global_inst: Instance allocator for groups
* @rst_cfg: Marker to reset HW LAG config
* @retrans_skbs: Cmsgs that could not be processed by HW and require
* retransmission
*/
struct nfp_fl_lag {
struct delayed_work work;
struct mutex lock;
struct list_head group_list;
struct ida ida_handle;
unsigned int pkt_num;
unsigned int batch_ver;
u8 global_inst;
bool rst_cfg;
struct sk_buff_head retrans_skbs;
};
/**
* struct nfp_fl_internal_ports - Flower APP priv data for additional ports
* @port_ids: Assignment of ids to any additional ports
* @lock: Lock for extra ports list
*/
struct nfp_fl_internal_ports {
struct idr port_ids;
spinlock_t lock;
};
/**
* struct nfp_flower_priv - Flower APP per-vNIC priv data
* @app: Back pointer to app
* @nn: Pointer to vNIC
* @mask_id_seed: Seed used for mask hash table
* @flower_version: HW version of flower
* @flower_ext_feats: Bitmap of extra features the HW supports
* @flower_en_feats: Bitmap of features enabled by HW
* @stats_ids: List of free stats ids
* @mask_ids: List of free mask ids
* @mask_table: Hash table used to store masks
* @stats_ring_size: Maximum number of allowed stats ids
* @flow_table: Hash table used to store flower rules
* @stats: Stored stats updates for flower rules
* @stats_lock: Lock for flower rule stats updates
* @stats_ctx_table: Hash table to map stats contexts to its flow rule
* @cmsg_work: Workqueue for control messages processing
* @cmsg_skbs_high: List of higher priority skbs for control message
* processing
* @cmsg_skbs_low: List of lower priority skbs for control message
* processing
* @tun: Tunnel offload data
* @reify_replies: atomically stores the number of replies received
* from firmware for repr reify
* @reify_wait_queue: wait queue for repr reify response counting
* @mtu_conf: Configuration of repr MTU value
* @nfp_lag: Link aggregation data block
* @indr_block_cb_priv: List of priv data passed to indirect block cbs
* @non_repr_priv: List of offloaded non-repr ports and their priv data
* @active_mem_unit: Current active memory unit for flower rules
* @total_mem_units: Total number of available memory units for flower rules
* @internal_ports: Internal port ids used in offloaded rules
* @qos_stats_work: Workqueue for qos stats processing
* @qos_rate_limiters: Current active qos rate limiters
* @qos_stats_lock: Lock on qos stats updates
* @pre_tun_rule_cnt: Number of pre-tunnel rules offloaded
* @merge_table: Hash table to store merged flows
*/
struct nfp_flower_priv {
struct nfp_app *app;
struct nfp_net *nn;
u32 mask_id_seed;
u64 flower_version;
u64 flower_ext_feats;
u8 flower_en_feats;
struct nfp_fl_stats_id stats_ids;
struct nfp_fl_mask_id mask_ids;
DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS);
u32 stats_ring_size;
struct rhashtable flow_table;
struct nfp_fl_stats *stats;
spinlock_t stats_lock; /* lock stats */
struct rhashtable stats_ctx_table;
struct work_struct cmsg_work;
struct sk_buff_head cmsg_skbs_high;
struct sk_buff_head cmsg_skbs_low;
struct nfp_fl_tunnel_offloads tun;
atomic_t reify_replies;
wait_queue_head_t reify_wait_queue;
struct nfp_mtu_conf mtu_conf;
struct nfp_fl_lag nfp_lag;
struct list_head indr_block_cb_priv;
struct list_head non_repr_priv;
unsigned int active_mem_unit;
unsigned int total_mem_units;
struct nfp_fl_internal_ports internal_ports;
struct delayed_work qos_stats_work;
unsigned int qos_rate_limiters;
spinlock_t qos_stats_lock; /* Protect the qos stats */
int pre_tun_rule_cnt;
struct rhashtable merge_table;
};
/**
* struct nfp_fl_qos - Flower APP priv data for quality of service
* @netdev_port_id: NFP port number of repr with qos info
* @curr_stats: Currently stored stats updates for qos info
* @prev_stats: Previously stored updates for qos info
* @last_update: Stored time when last stats were updated
*/
struct nfp_fl_qos {
u32 netdev_port_id;
struct nfp_stat_pair curr_stats;
struct nfp_stat_pair prev_stats;
u64 last_update;
};
/**
* struct nfp_flower_repr_priv - Flower APP per-repr priv data
* @nfp_repr: Back pointer to nfp_repr
* @lag_port_flags: Extended port flags to record lag state of repr
* @mac_offloaded: Flag indicating a MAC address is offloaded for repr
* @offloaded_mac_addr: MAC address that has been offloaded for repr
* @block_shared: Flag indicating if offload applies to shared blocks
* @mac_list: List entry of reprs that share the same offloaded MAC
* @qos_table: Stored info on filters implementing qos
* @on_bridge: Indicates if the repr is attached to a bridge
*/
struct nfp_flower_repr_priv {
struct nfp_repr *nfp_repr;
unsigned long lag_port_flags;
bool mac_offloaded;
u8 offloaded_mac_addr[ETH_ALEN];
bool block_shared;
struct list_head mac_list;
struct nfp_fl_qos qos_table;
bool on_bridge;
};
/**
* struct nfp_flower_non_repr_priv - Priv data for non-repr offloaded ports
* @list: List entry of offloaded reprs
* @netdev: Pointer to non-repr net_device
* @ref_count: Number of references held for this priv data
* @mac_offloaded: Flag indicating a MAC address is offloaded for device
* @offloaded_mac_addr: MAC address that has been offloaded for dev
*/
struct nfp_flower_non_repr_priv {
struct list_head list;
struct net_device *netdev;
int ref_count;
bool mac_offloaded;
u8 offloaded_mac_addr[ETH_ALEN];
};
struct nfp_fl_key_ls {
u32 key_layer_two;
u8 key_layer;
int key_size;
};
struct nfp_fl_rule_metadata {
u8 key_len;
u8 mask_len;
u8 act_len;
u8 flags;
__be32 host_ctx_id;
__be64 host_cookie __packed;
__be64 flow_version __packed;
__be32 shortcut;
};
struct nfp_fl_stats {
u64 pkts;
u64 bytes;
u64 used;
};
/**
* struct nfp_ipv6_addr_entry - cached IPv6 addresses
* @ipv6_addr: IP address
* @ref_count: number of rules currently using this IP
* @list: list pointer
*/
struct nfp_ipv6_addr_entry {
struct in6_addr ipv6_addr;
int ref_count;
struct list_head list;
};
struct nfp_fl_payload {
struct nfp_fl_rule_metadata meta;
unsigned long tc_flower_cookie;
struct rhash_head fl_node;
struct rcu_head rcu;
__be32 nfp_tun_ipv4_addr;
struct nfp_ipv6_addr_entry *nfp_tun_ipv6;
struct net_device *ingress_dev;
char *unmasked_data;
char *mask_data;
char *action_data;
struct list_head linked_flows;
bool in_hw;
struct {
struct net_device *dev;
__be16 vlan_tci;
__be16 port_idx;
} pre_tun_rule;
};
struct nfp_fl_payload_link {
/* A link contains a pointer to a merge flow and an associated sub_flow.
* Each merge flow will feature in 2 links to its underlying sub_flows.
* A sub_flow will have at least 1 link to a merge flow or more if it
* has been used to create multiple merge flows.
*
* For a merge flow, 'linked_flows' in its nfp_fl_payload struct lists
* all links to sub_flows (sub_flow.flow) via merge.list.
* For a sub_flow, 'linked_flows' gives all links to merge flows it has
* formed (merge_flow.flow) via sub_flow.list.
*/
struct {
struct list_head list;
struct nfp_fl_payload *flow;
} merge_flow, sub_flow;
};
extern const struct rhashtable_params nfp_flower_table_params;
extern const struct rhashtable_params merge_table_params;
struct nfp_merge_info {
u64 parent_ctx;
struct rhash_head ht_node;
};
struct nfp_fl_stats_frame {
__be32 stats_con_id;
__be32 pkt_count;
__be64 byte_count;
__be64 stats_cookie;
};
static inline bool
nfp_flower_internal_port_can_offload(struct nfp_app *app,
struct net_device *netdev)
{
struct nfp_flower_priv *app_priv = app->priv;
if (!(app_priv->flower_en_feats & NFP_FL_ENABLE_FLOW_MERGE))
return false;
if (!netdev->rtnl_link_ops)
return false;
if (!strcmp(netdev->rtnl_link_ops->kind, "openvswitch"))
return true;
return false;
}
/* The address of the merged flow acts as its cookie.
* Cookies supplied to us by TC flower are also addresses to allocated
* memory and thus this scheme should not generate any collisions.
*/
static inline bool nfp_flower_is_merge_flow(struct nfp_fl_payload *flow_pay)
{
return flow_pay->tc_flower_cookie == (unsigned long)flow_pay;
}
static inline bool nfp_flower_is_supported_bridge(struct net_device *netdev)
{
return netif_is_ovs_master(netdev);
}
int nfp_flower_metadata_init(struct nfp_app *app, u64 host_ctx_count,
unsigned int host_ctx_split);
void nfp_flower_metadata_cleanup(struct nfp_app *app);
int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
enum tc_setup_type type, void *type_data);
int nfp_flower_merge_offloaded_flows(struct nfp_app *app,
struct nfp_fl_payload *sub_flow1,
struct nfp_fl_payload *sub_flow2);
int nfp_flower_compile_flow_match(struct nfp_app *app,
struct flow_cls_offload *flow,
struct nfp_fl_key_ls *key_ls,
struct net_device *netdev,
struct nfp_fl_payload *nfp_flow,
enum nfp_flower_tun_type tun_type,
struct netlink_ext_ack *extack);
int nfp_flower_compile_action(struct nfp_app *app,
struct flow_cls_offload *flow,
struct net_device *netdev,
struct nfp_fl_payload *nfp_flow,
struct netlink_ext_ack *extack);
int nfp_compile_flow_metadata(struct nfp_app *app,
struct flow_cls_offload *flow,
struct nfp_fl_payload *nfp_flow,
struct net_device *netdev,
struct netlink_ext_ack *extack);
void __nfp_modify_flow_metadata(struct nfp_flower_priv *priv,
struct nfp_fl_payload *nfp_flow);
int nfp_modify_flow_metadata(struct nfp_app *app,
struct nfp_fl_payload *nfp_flow);
struct nfp_fl_payload *
nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie,
struct net_device *netdev);
struct nfp_fl_payload *
nfp_flower_get_fl_payload_from_ctx(struct nfp_app *app, u32 ctx_id);
struct nfp_fl_payload *
nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie);
void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb);
int nfp_tunnel_config_start(struct nfp_app *app);
void nfp_tunnel_config_stop(struct nfp_app *app);
int nfp_tunnel_mac_event_handler(struct nfp_app *app,
struct net_device *netdev,
unsigned long event, void *ptr);
void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4);
void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4);
void
nfp_tunnel_put_ipv6_off(struct nfp_app *app, struct nfp_ipv6_addr_entry *entry);
struct nfp_ipv6_addr_entry *
nfp_tunnel_add_ipv6_off(struct nfp_app *app, struct in6_addr *ipv6);
void nfp_tunnel_request_route_v4(struct nfp_app *app, struct sk_buff *skb);
void nfp_tunnel_request_route_v6(struct nfp_app *app, struct sk_buff *skb);
void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb);
void nfp_tunnel_keep_alive_v6(struct nfp_app *app, struct sk_buff *skb);
void nfp_flower_lag_init(struct nfp_fl_lag *lag);
void nfp_flower_lag_cleanup(struct nfp_fl_lag *lag);
int nfp_flower_lag_reset(struct nfp_fl_lag *lag);
int nfp_flower_lag_netdev_event(struct nfp_flower_priv *priv,
struct net_device *netdev,
unsigned long event, void *ptr);
bool nfp_flower_lag_unprocessed_msg(struct nfp_app *app, struct sk_buff *skb);
int nfp_flower_lag_populate_pre_action(struct nfp_app *app,
struct net_device *master,
struct nfp_fl_pre_lag *pre_act,
struct netlink_ext_ack *extack);
int nfp_flower_lag_get_output_id(struct nfp_app *app,
struct net_device *master);
void nfp_flower_qos_init(struct nfp_app *app);
void nfp_flower_qos_cleanup(struct nfp_app *app);
int nfp_flower_setup_qos_offload(struct nfp_app *app, struct net_device *netdev,
struct tc_cls_matchall_offload *flow);
void nfp_flower_stats_rlim_reply(struct nfp_app *app, struct sk_buff *skb);
int nfp_flower_indr_setup_tc_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv,
enum tc_setup_type type, void *type_data,
void *data,
void (*cleanup)(struct flow_block_cb *block_cb));
void nfp_flower_setup_indr_tc_release(void *cb_priv);
void
__nfp_flower_non_repr_priv_get(struct nfp_flower_non_repr_priv *non_repr_priv);
struct nfp_flower_non_repr_priv *
nfp_flower_non_repr_priv_get(struct nfp_app *app, struct net_device *netdev);
void
__nfp_flower_non_repr_priv_put(struct nfp_flower_non_repr_priv *non_repr_priv);
void
nfp_flower_non_repr_priv_put(struct nfp_app *app, struct net_device *netdev);
u32 nfp_flower_get_port_id_from_netdev(struct nfp_app *app,
struct net_device *netdev);
int nfp_flower_xmit_pre_tun_flow(struct nfp_app *app,
struct nfp_fl_payload *flow);
int nfp_flower_xmit_pre_tun_del_flow(struct nfp_app *app,
struct nfp_fl_payload *flow);
#endif
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