/* SPDX-License-Identifier: GPL-2.0-or-later *//* Copyright (c) 2016 Mellanox Technologies. All rights reserved. * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> */ #include <linux/device.h>#include <linux/etherdevice.h>#include <linux/mutex.h>#include <linux/netdevice.h>#include <linux/notifier.h>#include <linux/types.h>#include <linux/workqueue.h>#include <linux/xarray.h>#include <net/devlink.h>#include <net/net_namespace.h>#include <net/rtnetlink.h>#include <rdma/ib_verbs.h> #include "netlink_gen.h" struct devlink_rel; #define DEVLINK_REGISTERED XA_MARK_1 #define DEVLINK_RELOAD_STATS_ARRAY_SIZE \	(__DEVLINK_RELOAD_LIMIT_MAX * __DEVLINK_RELOAD_ACTION_MAX) struct devlink_dev_stats {	u32 reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];	u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];}; struct devlink {	u32 index;	struct xarray ports;	struct list_head rate_list;	struct list_head sb_list;	struct list_head dpipe_table_list;	struct list_head resource_list;	struct xarray params;	struct list_head region_list;	struct list_head reporter_list;	struct devlink_dpipe_headers *dpipe_headers;	struct list_head trap_list;	struct list_head trap_group_list;	struct list_head trap_policer_list;	struct list_head linecard_list;	const struct devlink_ops *ops;	struct xarray snapshot_ids;	struct devlink_dev_stats stats;	struct device *dev;	possible_net_t _net;	/* Serializes access to devlink instance specific objects such as	 * port, sb, dpipe, resource, params, region, traps and more.	 */	struct mutex lock;	struct lock_class_key lock_key;	u8 reload_failed:1;	refcount_t refcount;	struct rcu_work rwork;	struct devlink_rel *rel;	struct xarray nested_rels;	char priv[] __aligned(NETDEV_ALIGN);}; extern struct xarray devlinks;extern struct genl_family devlink_nl_family; /* devlink instances are open to the access from the user space after * devlink_register() call. Such logical barrier allows us to have certain * expectations related to locking. * * Before *_register() - we are in initialization stage and no parallel * access possible to the devlink instance. All drivers perform that phase * by implicitly holding device_lock. * * After *_register() - users and driver can access devlink instance at * the same time. */#define ASSERT_DEVLINK_REGISTERED(d)                                           \	WARN_ON_ONCE(!xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED))#define ASSERT_DEVLINK_NOT_REGISTERED(d)                                       \	WARN_ON_ONCE(xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED)) /* Iterate over devlink pointers which were possible to get reference to. * devlink_put() needs to be called for each iterated devlink pointer * in loop body in order to release the reference. */#define devlinks_xa_for_each_registered_get(net, index, devlink)	\	for (index = 0; (devlink = devlinks_xa_find_get(net, &index)); index++) struct devlink *devlinks_xa_find_get(struct net *net, unsigned long *indexp); static inline bool __devl_is_registered(struct devlink *devlink){	return xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED);} static inline bool devl_is_registered(struct devlink *devlink){	devl_assert_locked(devlink);	return __devl_is_registered(devlink);} static inline void devl_dev_lock(struct devlink *devlink, bool dev_lock){	if (dev_lock)		device_lock(devlink->dev);	devl_lock(devlink);} static inline void devl_dev_unlock(struct devlink *devlink, bool dev_lock){	devl_unlock(devlink);	if (dev_lock)		device_unlock(devlink->dev);} typedef void devlink_rel_notify_cb_t(struct devlink *devlink, u32 obj_index);typedef void devlink_rel_cleanup_cb_t(struct devlink *devlink, u32 obj_index,				      u32 rel_index); void devlink_rel_nested_in_clear(u32 rel_index);int devlink_rel_nested_in_add(u32 *rel_index, u32 devlink_index,			      u32 obj_index, devlink_rel_notify_cb_t *notify_cb,			      devlink_rel_cleanup_cb_t *cleanup_cb,			      struct devlink *devlink);void devlink_rel_nested_in_notify(struct devlink *devlink);int devlink_rel_devlink_handle_put(struct sk_buff *msg, struct devlink *devlink,				   u32 rel_index, int attrtype,				   bool *msg_updated); /* Netlink */enum devlink_multicast_groups {	DEVLINK_MCGRP_CONFIG,}; /* state held across netlink dumps */struct devlink_nl_dump_state {	unsigned long instance;	int idx;	union {		/* DEVLINK_CMD_REGION_READ */		struct {			u64 start_offset;		};		/* DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET */		struct {			u64 dump_ts;		};	};}; typedef int devlink_nl_dump_one_func_t(struct sk_buff *msg,				       struct devlink *devlink,				       struct netlink_callback *cb,				       int flags); struct devlink *devlink_get_from_attrs_lock(struct net *net, struct nlattr **attrs,			    bool dev_lock); int devlink_nl_dumpit(struct sk_buff *msg, struct netlink_callback *cb,		      devlink_nl_dump_one_func_t *dump_one); static inline struct devlink_nl_dump_state *devlink_dump_state(struct netlink_callback *cb){	NL_ASSERT_CTX_FITS(struct devlink_nl_dump_state); 	return (struct devlink_nl_dump_state *)cb->ctx;} static inline intdevlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink){	if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))		return -EMSGSIZE;	if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))		return -EMSGSIZE;	return 0;} static inline int devlink_nl_put_u64(struct sk_buff *msg, int attrtype, u64 val){	return nla_put_u64_64bit(msg, attrtype, val, DEVLINK_ATTR_PAD);} int devlink_nl_put_nested_handle(struct sk_buff *msg, struct net *net,				 struct devlink *devlink, int attrtype);int devlink_nl_msg_reply_and_new(struct sk_buff **msg, struct genl_info *info); static inline bool devlink_nl_notify_need(struct devlink *devlink){	return genl_has_listeners(&devlink_nl_family, devlink_net(devlink),				  DEVLINK_MCGRP_CONFIG);} struct devlink_obj_desc {	struct rcu_head rcu;	const char *bus_name;	const char *dev_name;	unsigned int port_index;	bool port_index_valid;	long data[];}; static inline void devlink_nl_obj_desc_init(struct devlink_obj_desc *desc,					    struct devlink *devlink){	memset(desc, 0, sizeof(*desc));	desc->bus_name = devlink->dev->bus->name;	desc->dev_name = dev_name(devlink->dev);} static inline void devlink_nl_obj_desc_port_set(struct devlink_obj_desc *desc,						struct devlink_port *devlink_port){	desc->port_index = devlink_port->index;	desc->port_index_valid = true;} int devlink_nl_notify_filter(struct sock *dsk, struct sk_buff *skb, void *data); static inline void devlink_nl_notify_send_desc(struct devlink *devlink,					       struct sk_buff *msg,					       struct devlink_obj_desc *desc){	genlmsg_multicast_netns_filtered(&devlink_nl_family,					 devlink_net(devlink),					 msg, 0, DEVLINK_MCGRP_CONFIG,					 GFP_KERNEL,					 devlink_nl_notify_filter, desc);} static inline void devlink_nl_notify_send(struct devlink *devlink,					  struct sk_buff *msg){	struct devlink_obj_desc desc; 	devlink_nl_obj_desc_init(&desc, devlink);	devlink_nl_notify_send_desc(devlink, msg, &desc);} /* Notify */void devlink_notify_register(struct devlink *devlink);void devlink_notify_unregister(struct devlink *devlink);void devlink_ports_notify_register(struct devlink *devlink);void devlink_ports_notify_unregister(struct devlink *devlink);void devlink_params_notify_register(struct devlink *devlink);void devlink_params_notify_unregister(struct devlink *devlink);void devlink_regions_notify_register(struct devlink *devlink);void devlink_regions_notify_unregister(struct devlink *devlink);void devlink_trap_policers_notify_register(struct devlink *devlink);void devlink_trap_policers_notify_unregister(struct devlink *devlink);void devlink_trap_groups_notify_register(struct devlink *devlink);void devlink_trap_groups_notify_unregister(struct devlink *devlink);void devlink_traps_notify_register(struct devlink *devlink);void devlink_traps_notify_unregister(struct devlink *devlink);void devlink_rates_notify_register(struct devlink *devlink);void devlink_rates_notify_unregister(struct devlink *devlink);void devlink_linecards_notify_register(struct devlink *devlink);void devlink_linecards_notify_unregister(struct devlink *devlink); /* Ports */#define ASSERT_DEVLINK_PORT_INITIALIZED(devlink_port)				\	WARN_ON_ONCE(!(devlink_port)->initialized) struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,					       unsigned int port_index);int devlink_port_netdevice_event(struct notifier_block *nb,				 unsigned long event, void *ptr);struct devlink_port *devlink_port_get_from_info(struct devlink *devlink, struct genl_info *info);struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,						 struct nlattr **attrs); /* Reload */bool devlink_reload_actions_valid(const struct devlink_ops *ops);int devlink_reload(struct devlink *devlink, struct net *dest_net,		   enum devlink_reload_action action,		   enum devlink_reload_limit limit,		   u32 *actions_performed, struct netlink_ext_ack *extack); static inline bool devlink_reload_supported(const struct devlink_ops *ops){	return ops->reload_down && ops->reload_up;} /* Params */void devlink_params_driverinit_load_new(struct devlink *devlink); /* Resources */struct devlink_resource;int devlink_resources_validate(struct devlink *devlink,			       struct devlink_resource *resource,			       struct genl_info *info); /* Rates */int devlink_rate_nodes_check(struct devlink *devlink, u16 mode,			     struct netlink_ext_ack *extack); /* Linecards */unsigned int devlink_linecard_index(struct devlink_linecard *linecard);