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/* 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/mutex.h>
#include <linux/netdevice.h>
#include <linux/notifier.h>
#include <linux/types.h>
#include <linux/xarray.h>
#include <net/devlink.h>
#include <net/net_namespace.h>
#define DEVLINK_REGISTERED XA_MARK_1
#define DEVLINK_UNREGISTERING XA_MARK_2
#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 list_head param_list;
struct list_head region_list;
struct list_head reporter_list;
struct mutex reporters_lock; /* protects 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;
struct mutex linecards_lock; /* protects linecard_list */
const struct devlink_ops *ops;
u64 features;
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 completion comp;
struct rcu_head rcu;
struct notifier_block netdevice_nb;
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_get(net, index, devlink, filter) \
for (index = 0, \
devlink = devlinks_xa_find_get_first(net, &index, filter); \
devlink; devlink = devlinks_xa_find_get_next(net, &index, filter))
#define devlinks_xa_for_each_registered_get(net, index, devlink) \
devlinks_xa_for_each_get(net, index, devlink, DEVLINK_REGISTERED)
struct devlink *
devlinks_xa_find_get_first(struct net *net, unsigned long *indexp,
xa_mark_t filter);
struct devlink *
devlinks_xa_find_get_next(struct net *net, unsigned long *indexp,
xa_mark_t filter);
/* Netlink */
#define DEVLINK_NL_FLAG_NEED_PORT BIT(0)
#define DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT BIT(1)
#define DEVLINK_NL_FLAG_NEED_RATE BIT(2)
#define DEVLINK_NL_FLAG_NEED_RATE_NODE BIT(3)
#define DEVLINK_NL_FLAG_NEED_LINECARD BIT(4)
enum devlink_multicast_groups {
DEVLINK_MCGRP_CONFIG,
};
extern const struct genl_small_ops devlink_nl_ops[56];
struct devlink *devlink_get_from_attrs(struct net *net, struct nlattr **attrs);
void devlink_notify_unregister(struct devlink *devlink);
void devlink_notify_register(struct devlink *devlink);
/* Ports */
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);
/* 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;
}
/* Line cards */
struct devlink_linecard;
struct devlink_linecard *
devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info);
void devlink_linecard_put(struct devlink_linecard *linecard);
/* Rates */
struct devlink_rate *
devlink_rate_get_from_info(struct devlink *devlink, struct genl_info *info);
struct devlink_rate *
devlink_rate_node_get_from_info(struct devlink *devlink,
struct genl_info *info);
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