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687125b5 JK |
1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* Copyright (c) 2016 Mellanox Technologies. All rights reserved. | |
3 | * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> | |
4 | */ | |
5 | ||
6 | #include <linux/mutex.h> | |
7 | #include <linux/netdevice.h> | |
8 | #include <linux/notifier.h> | |
9 | #include <linux/types.h> | |
93e71edf | 10 | #include <linux/workqueue.h> |
687125b5 JK |
11 | #include <linux/xarray.h> |
12 | #include <net/devlink.h> | |
13 | #include <net/net_namespace.h> | |
14 | ||
15 | #define DEVLINK_REGISTERED XA_MARK_1 | |
687125b5 JK |
16 | |
17 | #define DEVLINK_RELOAD_STATS_ARRAY_SIZE \ | |
18 | (__DEVLINK_RELOAD_LIMIT_MAX * __DEVLINK_RELOAD_ACTION_MAX) | |
19 | ||
20 | struct devlink_dev_stats { | |
21 | u32 reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE]; | |
22 | u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE]; | |
23 | }; | |
24 | ||
25 | struct devlink { | |
26 | u32 index; | |
27 | struct xarray ports; | |
28 | struct list_head rate_list; | |
29 | struct list_head sb_list; | |
30 | struct list_head dpipe_table_list; | |
31 | struct list_head resource_list; | |
a72e17b4 | 32 | struct xarray params; |
687125b5 JK |
33 | struct list_head region_list; |
34 | struct list_head reporter_list; | |
687125b5 JK |
35 | struct devlink_dpipe_headers *dpipe_headers; |
36 | struct list_head trap_list; | |
37 | struct list_head trap_group_list; | |
38 | struct list_head trap_policer_list; | |
39 | struct list_head linecard_list; | |
687125b5 | 40 | const struct devlink_ops *ops; |
687125b5 JK |
41 | struct xarray snapshot_ids; |
42 | struct devlink_dev_stats stats; | |
43 | struct device *dev; | |
44 | possible_net_t _net; | |
45 | /* Serializes access to devlink instance specific objects such as | |
46 | * port, sb, dpipe, resource, params, region, traps and more. | |
47 | */ | |
48 | struct mutex lock; | |
49 | struct lock_class_key lock_key; | |
50 | u8 reload_failed:1; | |
51 | refcount_t refcount; | |
93e71edf | 52 | struct rcu_work rwork; |
687125b5 JK |
53 | char priv[] __aligned(NETDEV_ALIGN); |
54 | }; | |
55 | ||
56 | extern struct xarray devlinks; | |
57 | extern struct genl_family devlink_nl_family; | |
58 | ||
59 | /* devlink instances are open to the access from the user space after | |
60 | * devlink_register() call. Such logical barrier allows us to have certain | |
61 | * expectations related to locking. | |
62 | * | |
63 | * Before *_register() - we are in initialization stage and no parallel | |
64 | * access possible to the devlink instance. All drivers perform that phase | |
65 | * by implicitly holding device_lock. | |
66 | * | |
67 | * After *_register() - users and driver can access devlink instance at | |
68 | * the same time. | |
69 | */ | |
70 | #define ASSERT_DEVLINK_REGISTERED(d) \ | |
71 | WARN_ON_ONCE(!xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED)) | |
72 | #define ASSERT_DEVLINK_NOT_REGISTERED(d) \ | |
73 | WARN_ON_ONCE(xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED)) | |
74 | ||
75 | /* Iterate over devlink pointers which were possible to get reference to. | |
76 | * devlink_put() needs to be called for each iterated devlink pointer | |
77 | * in loop body in order to release the reference. | |
78 | */ | |
687125b5 | 79 | #define devlinks_xa_for_each_registered_get(net, index, devlink) \ |
d7727819 JK |
80 | for (index = 0; (devlink = devlinks_xa_find_get(net, &index)); index++) |
81 | ||
82 | struct devlink *devlinks_xa_find_get(struct net *net, unsigned long *indexp); | |
687125b5 | 83 | |
ed539ba6 JK |
84 | static inline bool devl_is_registered(struct devlink *devlink) |
85 | { | |
63ba54a5 | 86 | devl_assert_locked(devlink); |
ed539ba6 JK |
87 | return xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED); |
88 | } | |
89 | ||
687125b5 | 90 | /* Netlink */ |
623cd13b JK |
91 | #define DEVLINK_NL_FLAG_NEED_PORT BIT(0) |
92 | #define DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT BIT(1) | |
93 | #define DEVLINK_NL_FLAG_NEED_RATE BIT(2) | |
94 | #define DEVLINK_NL_FLAG_NEED_RATE_NODE BIT(3) | |
95 | #define DEVLINK_NL_FLAG_NEED_LINECARD BIT(4) | |
96 | ||
97 | enum devlink_multicast_groups { | |
98 | DEVLINK_MCGRP_CONFIG, | |
99 | }; | |
100 | ||
3015f822 JK |
101 | /* state held across netlink dumps */ |
102 | struct devlink_nl_dump_state { | |
731d69a6 | 103 | unsigned long instance; |
3015f822 JK |
104 | int idx; |
105 | union { | |
106 | /* DEVLINK_CMD_REGION_READ */ | |
107 | struct { | |
108 | u64 start_offset; | |
109 | }; | |
110 | /* DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET */ | |
111 | struct { | |
112 | u64 dump_ts; | |
113 | }; | |
114 | }; | |
115 | }; | |
116 | ||
f8744595 | 117 | struct devlink_cmd { |
07f3af66 JK |
118 | int (*dump_one)(struct sk_buff *msg, struct devlink *devlink, |
119 | struct netlink_callback *cb); | |
120 | }; | |
121 | ||
623cd13b JK |
122 | extern const struct genl_small_ops devlink_nl_ops[56]; |
123 | ||
870c7ad4 JK |
124 | struct devlink * |
125 | devlink_get_from_attrs_lock(struct net *net, struct nlattr **attrs); | |
623cd13b | 126 | |
687125b5 JK |
127 | void devlink_notify_unregister(struct devlink *devlink); |
128 | void devlink_notify_register(struct devlink *devlink); | |
129 | ||
c3a4fd57 JP |
130 | int devlink_nl_instance_iter_dumpit(struct sk_buff *msg, |
131 | struct netlink_callback *cb); | |
07f3af66 | 132 | |
3015f822 JK |
133 | static inline struct devlink_nl_dump_state * |
134 | devlink_dump_state(struct netlink_callback *cb) | |
135 | { | |
ec8f7d49 | 136 | NL_ASSERT_DUMP_CTX_FITS(struct devlink_nl_dump_state); |
3015f822 JK |
137 | |
138 | return (struct devlink_nl_dump_state *)cb->ctx; | |
139 | } | |
140 | ||
dbeeca81 MS |
141 | static inline int |
142 | devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink) | |
143 | { | |
144 | if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name)) | |
145 | return -EMSGSIZE; | |
146 | if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev))) | |
147 | return -EMSGSIZE; | |
148 | return 0; | |
149 | } | |
150 | ||
f8744595 | 151 | /* Commands */ |
8589ba4e JP |
152 | extern const struct devlink_cmd devl_cmd_get; |
153 | extern const struct devlink_cmd devl_cmd_port_get; | |
154 | extern const struct devlink_cmd devl_cmd_sb_get; | |
155 | extern const struct devlink_cmd devl_cmd_sb_pool_get; | |
156 | extern const struct devlink_cmd devl_cmd_sb_port_pool_get; | |
157 | extern const struct devlink_cmd devl_cmd_sb_tc_pool_bind_get; | |
158 | extern const struct devlink_cmd devl_cmd_param_get; | |
159 | extern const struct devlink_cmd devl_cmd_region_get; | |
160 | extern const struct devlink_cmd devl_cmd_info_get; | |
161 | extern const struct devlink_cmd devl_cmd_health_reporter_get; | |
162 | extern const struct devlink_cmd devl_cmd_trap_get; | |
163 | extern const struct devlink_cmd devl_cmd_trap_group_get; | |
164 | extern const struct devlink_cmd devl_cmd_trap_policer_get; | |
165 | extern const struct devlink_cmd devl_cmd_rate_get; | |
166 | extern const struct devlink_cmd devl_cmd_linecard_get; | |
167 | extern const struct devlink_cmd devl_cmd_selftests_get; | |
5ce76d78 | 168 | |
dbeeca81 MS |
169 | /* Notify */ |
170 | void devlink_notify(struct devlink *devlink, enum devlink_command cmd); | |
171 | ||
687125b5 JK |
172 | /* Ports */ |
173 | int devlink_port_netdevice_event(struct notifier_block *nb, | |
174 | unsigned long event, void *ptr); | |
175 | ||
623cd13b JK |
176 | struct devlink_port * |
177 | devlink_port_get_from_info(struct devlink *devlink, struct genl_info *info); | |
db6b5f3e MS |
178 | struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink, |
179 | struct nlattr **attrs); | |
623cd13b | 180 | |
687125b5 JK |
181 | /* Reload */ |
182 | bool devlink_reload_actions_valid(const struct devlink_ops *ops); | |
183 | int devlink_reload(struct devlink *devlink, struct net *dest_net, | |
184 | enum devlink_reload_action action, | |
185 | enum devlink_reload_limit limit, | |
186 | u32 *actions_performed, struct netlink_ext_ack *extack); | |
187 | ||
188 | static inline bool devlink_reload_supported(const struct devlink_ops *ops) | |
189 | { | |
190 | return ops->reload_down && ops->reload_up; | |
191 | } | |
623cd13b | 192 | |
afd888c3 JP |
193 | /* Params */ |
194 | void devlink_params_driverinit_load_new(struct devlink *devlink); | |
195 | ||
c6ed7d6e MS |
196 | /* Resources */ |
197 | struct devlink_resource; | |
198 | int devlink_resources_validate(struct devlink *devlink, | |
199 | struct devlink_resource *resource, | |
200 | struct genl_info *info); | |
201 | ||
623cd13b JK |
202 | /* Line cards */ |
203 | struct devlink_linecard; | |
204 | ||
205 | struct devlink_linecard * | |
206 | devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info); | |
623cd13b JK |
207 | |
208 | /* Rates */ | |
af2f8c1f MS |
209 | int devlink_rate_nodes_check(struct devlink *devlink, u16 mode, |
210 | struct netlink_ext_ack *extack); | |
623cd13b JK |
211 | struct devlink_rate * |
212 | devlink_rate_get_from_info(struct devlink *devlink, struct genl_info *info); | |
213 | struct devlink_rate * | |
214 | devlink_rate_node_get_from_info(struct devlink *devlink, | |
215 | struct genl_info *info); | |
dbeeca81 MS |
216 | /* Devlink nl cmds */ |
217 | int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info); | |
c6ed7d6e | 218 | int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info); |
af2f8c1f MS |
219 | int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb, struct genl_info *info); |
220 | int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb, struct genl_info *info); | |
d60191c4 | 221 | int devlink_nl_cmd_info_get_doit(struct sk_buff *skb, struct genl_info *info); |
a13aab66 | 222 | int devlink_nl_cmd_flash_update(struct sk_buff *skb, struct genl_info *info); |
7c976c7c MS |
223 | int devlink_nl_cmd_selftests_get_doit(struct sk_buff *skb, struct genl_info *info); |
224 | int devlink_nl_cmd_selftests_run(struct sk_buff *skb, struct genl_info *info); | |
db6b5f3e MS |
225 | int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb, |
226 | struct genl_info *info); | |
227 | int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb, | |
228 | struct genl_info *info); | |
55b9b249 MS |
229 | int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb, |
230 | struct genl_info *info); | |
a929df7f MS |
231 | int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb, |
232 | struct genl_info *info); | |
7004c6c4 MS |
233 | int devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb, |
234 | struct netlink_callback *cb); | |
235 | int devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb, | |
236 | struct genl_info *info); | |
c9311ee1 MS |
237 | int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb, |
238 | struct genl_info *info); |