1687125b5SJakub Kicinski /* SPDX-License-Identifier: GPL-2.0-or-later */ 2687125b5SJakub Kicinski /* Copyright (c) 2016 Mellanox Technologies. All rights reserved. 3687125b5SJakub Kicinski * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> 4687125b5SJakub Kicinski */ 5687125b5SJakub Kicinski 6687125b5SJakub Kicinski #include <linux/mutex.h> 7687125b5SJakub Kicinski #include <linux/netdevice.h> 8687125b5SJakub Kicinski #include <linux/notifier.h> 9687125b5SJakub Kicinski #include <linux/types.h> 1093e71edfSJakub Kicinski #include <linux/workqueue.h> 11687125b5SJakub Kicinski #include <linux/xarray.h> 12687125b5SJakub Kicinski #include <net/devlink.h> 13687125b5SJakub Kicinski #include <net/net_namespace.h> 14687125b5SJakub Kicinski 15687125b5SJakub Kicinski #define DEVLINK_REGISTERED XA_MARK_1 16687125b5SJakub Kicinski 17687125b5SJakub Kicinski #define DEVLINK_RELOAD_STATS_ARRAY_SIZE \ 18687125b5SJakub Kicinski (__DEVLINK_RELOAD_LIMIT_MAX * __DEVLINK_RELOAD_ACTION_MAX) 19687125b5SJakub Kicinski 20687125b5SJakub Kicinski struct devlink_dev_stats { 21687125b5SJakub Kicinski u32 reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE]; 22687125b5SJakub Kicinski u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE]; 23687125b5SJakub Kicinski }; 24687125b5SJakub Kicinski 25687125b5SJakub Kicinski struct devlink { 26687125b5SJakub Kicinski u32 index; 27687125b5SJakub Kicinski struct xarray ports; 28687125b5SJakub Kicinski struct list_head rate_list; 29687125b5SJakub Kicinski struct list_head sb_list; 30687125b5SJakub Kicinski struct list_head dpipe_table_list; 31687125b5SJakub Kicinski struct list_head resource_list; 32687125b5SJakub Kicinski struct list_head param_list; 33687125b5SJakub Kicinski struct list_head region_list; 34687125b5SJakub Kicinski struct list_head reporter_list; 35687125b5SJakub Kicinski struct devlink_dpipe_headers *dpipe_headers; 36687125b5SJakub Kicinski struct list_head trap_list; 37687125b5SJakub Kicinski struct list_head trap_group_list; 38687125b5SJakub Kicinski struct list_head trap_policer_list; 39687125b5SJakub Kicinski struct list_head linecard_list; 40687125b5SJakub Kicinski const struct devlink_ops *ops; 41687125b5SJakub Kicinski struct xarray snapshot_ids; 42687125b5SJakub Kicinski struct devlink_dev_stats stats; 43687125b5SJakub Kicinski struct device *dev; 44687125b5SJakub Kicinski possible_net_t _net; 45687125b5SJakub Kicinski /* Serializes access to devlink instance specific objects such as 46687125b5SJakub Kicinski * port, sb, dpipe, resource, params, region, traps and more. 47687125b5SJakub Kicinski */ 48687125b5SJakub Kicinski struct mutex lock; 49687125b5SJakub Kicinski struct lock_class_key lock_key; 50687125b5SJakub Kicinski u8 reload_failed:1; 51687125b5SJakub Kicinski refcount_t refcount; 5293e71edfSJakub Kicinski struct rcu_work rwork; 53687125b5SJakub Kicinski struct notifier_block netdevice_nb; 54687125b5SJakub Kicinski char priv[] __aligned(NETDEV_ALIGN); 55687125b5SJakub Kicinski }; 56687125b5SJakub Kicinski 57687125b5SJakub Kicinski extern struct xarray devlinks; 58687125b5SJakub Kicinski extern struct genl_family devlink_nl_family; 59687125b5SJakub Kicinski 60687125b5SJakub Kicinski /* devlink instances are open to the access from the user space after 61687125b5SJakub Kicinski * devlink_register() call. Such logical barrier allows us to have certain 62687125b5SJakub Kicinski * expectations related to locking. 63687125b5SJakub Kicinski * 64687125b5SJakub Kicinski * Before *_register() - we are in initialization stage and no parallel 65687125b5SJakub Kicinski * access possible to the devlink instance. All drivers perform that phase 66687125b5SJakub Kicinski * by implicitly holding device_lock. 67687125b5SJakub Kicinski * 68687125b5SJakub Kicinski * After *_register() - users and driver can access devlink instance at 69687125b5SJakub Kicinski * the same time. 70687125b5SJakub Kicinski */ 71687125b5SJakub Kicinski #define ASSERT_DEVLINK_REGISTERED(d) \ 72687125b5SJakub Kicinski WARN_ON_ONCE(!xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED)) 73687125b5SJakub Kicinski #define ASSERT_DEVLINK_NOT_REGISTERED(d) \ 74687125b5SJakub Kicinski WARN_ON_ONCE(xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED)) 75687125b5SJakub Kicinski 76687125b5SJakub Kicinski /* Iterate over devlink pointers which were possible to get reference to. 77687125b5SJakub Kicinski * devlink_put() needs to be called for each iterated devlink pointer 78687125b5SJakub Kicinski * in loop body in order to release the reference. 79687125b5SJakub Kicinski */ 80687125b5SJakub Kicinski #define devlinks_xa_for_each_registered_get(net, index, devlink) \ 81d7727819SJakub Kicinski for (index = 0; (devlink = devlinks_xa_find_get(net, &index)); index++) 82687125b5SJakub Kicinski 83d7727819SJakub Kicinski struct devlink *devlinks_xa_find_get(struct net *net, unsigned long *indexp); 84687125b5SJakub Kicinski 85ed539ba6SJakub Kicinski static inline bool devl_is_registered(struct devlink *devlink) 86ed539ba6SJakub Kicinski { 8763ba54a5SJiri Pirko devl_assert_locked(devlink); 88ed539ba6SJakub Kicinski return xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED); 89ed539ba6SJakub Kicinski } 90ed539ba6SJakub Kicinski 91687125b5SJakub Kicinski /* Netlink */ 92623cd13bSJakub Kicinski #define DEVLINK_NL_FLAG_NEED_PORT BIT(0) 93623cd13bSJakub Kicinski #define DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT BIT(1) 94623cd13bSJakub Kicinski #define DEVLINK_NL_FLAG_NEED_RATE BIT(2) 95623cd13bSJakub Kicinski #define DEVLINK_NL_FLAG_NEED_RATE_NODE BIT(3) 96623cd13bSJakub Kicinski #define DEVLINK_NL_FLAG_NEED_LINECARD BIT(4) 97623cd13bSJakub Kicinski 98623cd13bSJakub Kicinski enum devlink_multicast_groups { 99623cd13bSJakub Kicinski DEVLINK_MCGRP_CONFIG, 100623cd13bSJakub Kicinski }; 101623cd13bSJakub Kicinski 1023015f822SJakub Kicinski /* state held across netlink dumps */ 1033015f822SJakub Kicinski struct devlink_nl_dump_state { 104731d69a6SJakub Kicinski unsigned long instance; 1053015f822SJakub Kicinski int idx; 1063015f822SJakub Kicinski union { 1073015f822SJakub Kicinski /* DEVLINK_CMD_REGION_READ */ 1083015f822SJakub Kicinski struct { 1093015f822SJakub Kicinski u64 start_offset; 1103015f822SJakub Kicinski }; 1113015f822SJakub Kicinski /* DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET */ 1123015f822SJakub Kicinski struct { 1133015f822SJakub Kicinski u64 dump_ts; 1143015f822SJakub Kicinski }; 1153015f822SJakub Kicinski }; 1163015f822SJakub Kicinski }; 1173015f822SJakub Kicinski 11807f3af66SJakub Kicinski struct devlink_gen_cmd { 11907f3af66SJakub Kicinski int (*dump_one)(struct sk_buff *msg, struct devlink *devlink, 12007f3af66SJakub Kicinski struct netlink_callback *cb); 12107f3af66SJakub Kicinski }; 12207f3af66SJakub Kicinski 123623cd13bSJakub Kicinski extern const struct genl_small_ops devlink_nl_ops[56]; 124623cd13bSJakub Kicinski 125870c7ad4SJakub Kicinski struct devlink * 126870c7ad4SJakub Kicinski devlink_get_from_attrs_lock(struct net *net, struct nlattr **attrs); 127623cd13bSJakub Kicinski 128687125b5SJakub Kicinski void devlink_notify_unregister(struct devlink *devlink); 129687125b5SJakub Kicinski void devlink_notify_register(struct devlink *devlink); 130687125b5SJakub Kicinski 131*c3a4fd57SJiri Pirko int devlink_nl_instance_iter_dumpit(struct sk_buff *msg, 13207f3af66SJakub Kicinski struct netlink_callback *cb); 13307f3af66SJakub Kicinski 1343015f822SJakub Kicinski static inline struct devlink_nl_dump_state * 1353015f822SJakub Kicinski devlink_dump_state(struct netlink_callback *cb) 1363015f822SJakub Kicinski { 137ec8f7d49SJakub Kicinski NL_ASSERT_DUMP_CTX_FITS(struct devlink_nl_dump_state); 1383015f822SJakub Kicinski 1393015f822SJakub Kicinski return (struct devlink_nl_dump_state *)cb->ctx; 1403015f822SJakub Kicinski } 1413015f822SJakub Kicinski 1425ce76d78SJakub Kicinski /* gen cmds */ 1435ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_inst; 1445ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_port; 1455ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_sb; 1465ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_sb_pool; 1475ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_sb_port_pool; 1485ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_sb_tc_pool_bind; 1495ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_selftests; 1505ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_param; 1515ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_region; 1525ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_info; 15319be51a9SJiri Pirko extern const struct devlink_gen_cmd devl_gen_health_reporter; 1545ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_trap; 1555ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_trap_group; 1565ce76d78SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_trap_policer; 15725573968SJiri Pirko extern const struct devlink_gen_cmd devl_gen_linecard; 1585ce76d78SJakub Kicinski 159687125b5SJakub Kicinski /* Ports */ 160687125b5SJakub Kicinski int devlink_port_netdevice_event(struct notifier_block *nb, 161687125b5SJakub Kicinski unsigned long event, void *ptr); 162687125b5SJakub Kicinski 163623cd13bSJakub Kicinski struct devlink_port * 164623cd13bSJakub Kicinski devlink_port_get_from_info(struct devlink *devlink, struct genl_info *info); 165623cd13bSJakub Kicinski 166687125b5SJakub Kicinski /* Reload */ 167687125b5SJakub Kicinski bool devlink_reload_actions_valid(const struct devlink_ops *ops); 168687125b5SJakub Kicinski int devlink_reload(struct devlink *devlink, struct net *dest_net, 169687125b5SJakub Kicinski enum devlink_reload_action action, 170687125b5SJakub Kicinski enum devlink_reload_limit limit, 171687125b5SJakub Kicinski u32 *actions_performed, struct netlink_ext_ack *extack); 172687125b5SJakub Kicinski 173687125b5SJakub Kicinski static inline bool devlink_reload_supported(const struct devlink_ops *ops) 174687125b5SJakub Kicinski { 175687125b5SJakub Kicinski return ops->reload_down && ops->reload_up; 176687125b5SJakub Kicinski } 177623cd13bSJakub Kicinski 178623cd13bSJakub Kicinski /* Line cards */ 179623cd13bSJakub Kicinski struct devlink_linecard; 180623cd13bSJakub Kicinski 181623cd13bSJakub Kicinski struct devlink_linecard * 182623cd13bSJakub Kicinski devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info); 183623cd13bSJakub Kicinski 184623cd13bSJakub Kicinski /* Rates */ 18507f3af66SJakub Kicinski extern const struct devlink_gen_cmd devl_gen_rate_get; 18607f3af66SJakub Kicinski 187623cd13bSJakub Kicinski struct devlink_rate * 188623cd13bSJakub Kicinski devlink_rate_get_from_info(struct devlink *devlink, struct genl_info *info); 189623cd13bSJakub Kicinski struct devlink_rate * 190623cd13bSJakub Kicinski devlink_rate_node_get_from_info(struct devlink *devlink, 191623cd13bSJakub Kicinski struct genl_info *info); 192