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Merge tag 'net-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
[linux.git] / drivers / net / netdevsim / netdevsim.h
1 /*
2  * Copyright (C) 2017 Netronome Systems, Inc.
3  *
4  * This software is licensed under the GNU General License Version 2,
5  * June 1991 as shown in the file COPYING in the top-level directory of this
6  * source tree.
7  *
8  * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
9  * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
10  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
11  * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
12  * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
13  * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
14  */
15
16 #include <linux/debugfs.h>
17 #include <linux/device.h>
18 #include <linux/ethtool.h>
19 #include <linux/kernel.h>
20 #include <linux/list.h>
21 #include <linux/netdevice.h>
22 #include <linux/u64_stats_sync.h>
23 #include <net/devlink.h>
24 #include <net/udp_tunnel.h>
25 #include <net/xdp.h>
26
27 #define DRV_NAME        "netdevsim"
28
29 #define NSIM_XDP_MAX_MTU        4000
30
31 #define NSIM_EA(extack, msg)    NL_SET_ERR_MSG_MOD((extack), msg)
32
33 #define NSIM_IPSEC_MAX_SA_COUNT         33
34 #define NSIM_IPSEC_VALID                BIT(31)
35 #define NSIM_UDP_TUNNEL_N_PORTS         4
36
37 struct nsim_sa {
38         struct xfrm_state *xs;
39         __be32 ipaddr[4];
40         u32 key[4];
41         u32 salt;
42         bool used;
43         bool crypt;
44         bool rx;
45 };
46
47 struct nsim_ipsec {
48         struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];
49         struct dentry *pfile;
50         u32 count;
51         u32 tx;
52         u32 ok;
53 };
54
55 struct nsim_ethtool_pauseparam {
56         bool rx;
57         bool tx;
58         bool report_stats_rx;
59         bool report_stats_tx;
60 };
61
62 struct nsim_ethtool {
63         u32 get_err;
64         u32 set_err;
65         u32 channels;
66         struct nsim_ethtool_pauseparam pauseparam;
67         struct ethtool_coalesce coalesce;
68         struct ethtool_ringparam ring;
69         struct ethtool_fecparam fec;
70 };
71
72 struct netdevsim {
73         struct net_device *netdev;
74         struct nsim_dev *nsim_dev;
75         struct nsim_dev_port *nsim_dev_port;
76
77         u64 tx_packets;
78         u64 tx_bytes;
79         struct u64_stats_sync syncp;
80
81         struct nsim_bus_dev *nsim_bus_dev;
82
83         struct bpf_prog *bpf_offloaded;
84         u32 bpf_offloaded_id;
85
86         struct xdp_attachment_info xdp;
87         struct xdp_attachment_info xdp_hw;
88
89         bool bpf_tc_accept;
90         bool bpf_tc_non_bound_accept;
91         bool bpf_xdpdrv_accept;
92         bool bpf_xdpoffload_accept;
93
94         bool bpf_map_accept;
95         struct nsim_ipsec ipsec;
96         struct {
97                 u32 inject_error;
98                 u32 sleep;
99                 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
100                 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
101                 struct debugfs_u32_array dfs_ports[2];
102         } udp_ports;
103
104         struct nsim_ethtool ethtool;
105 };
106
107 struct netdevsim *
108 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
109 void nsim_destroy(struct netdevsim *ns);
110
111 void nsim_ethtool_init(struct netdevsim *ns);
112
113 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
114 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
115                                  struct net_device *dev);
116 void nsim_udp_tunnels_info_destroy(struct net_device *dev);
117
118 #ifdef CONFIG_BPF_SYSCALL
119 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
120 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
121 int nsim_bpf_init(struct netdevsim *ns);
122 void nsim_bpf_uninit(struct netdevsim *ns);
123 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
124 int nsim_bpf_disable_tc(struct netdevsim *ns);
125 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
126                                void *type_data, void *cb_priv);
127 #else
128
129 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
130 {
131         return 0;
132 }
133
134 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
135 {
136 }
137 static inline int nsim_bpf_init(struct netdevsim *ns)
138 {
139         return 0;
140 }
141
142 static inline void nsim_bpf_uninit(struct netdevsim *ns)
143 {
144 }
145
146 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
147 {
148         return -EOPNOTSUPP;
149 }
150
151 static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
152 {
153         return 0;
154 }
155
156 static inline int
157 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
158                            void *cb_priv)
159 {
160         return -EOPNOTSUPP;
161 }
162 #endif
163
164 enum nsim_resource_id {
165         NSIM_RESOURCE_NONE,   /* DEVLINK_RESOURCE_ID_PARENT_TOP */
166         NSIM_RESOURCE_IPV4,
167         NSIM_RESOURCE_IPV4_FIB,
168         NSIM_RESOURCE_IPV4_FIB_RULES,
169         NSIM_RESOURCE_IPV6,
170         NSIM_RESOURCE_IPV6_FIB,
171         NSIM_RESOURCE_IPV6_FIB_RULES,
172         NSIM_RESOURCE_NEXTHOPS,
173 };
174
175 struct nsim_dev_health {
176         struct devlink_health_reporter *empty_reporter;
177         struct devlink_health_reporter *dummy_reporter;
178         struct dentry *ddir;
179         char *recovered_break_msg;
180         u32 binary_len;
181         bool fail_recover;
182 };
183
184 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
185 void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
186
187 #if IS_ENABLED(CONFIG_PSAMPLE)
188 int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
189 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
190 #else
191 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
192 {
193         return 0;
194 }
195
196 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
197 {
198 }
199 #endif
200
201 enum nsim_dev_port_type {
202         NSIM_DEV_PORT_TYPE_PF,
203         NSIM_DEV_PORT_TYPE_VF,
204 };
205
206 #define NSIM_DEV_VF_PORT_INDEX_BASE 128
207 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX
208
209 struct nsim_dev_port {
210         struct list_head list;
211         struct devlink_port devlink_port;
212         unsigned int port_index;
213         enum nsim_dev_port_type port_type;
214         struct dentry *ddir;
215         struct dentry *rate_parent;
216         char *parent_name;
217         struct netdevsim *ns;
218 };
219
220 struct nsim_vf_config {
221         int link_state;
222         u16 min_tx_rate;
223         u16 max_tx_rate;
224         u16 vlan;
225         __be16 vlan_proto;
226         u16 qos;
227         u8 vf_mac[ETH_ALEN];
228         bool spoofchk_enabled;
229         bool trusted;
230         bool rss_query_enabled;
231 };
232
233 struct nsim_dev {
234         struct nsim_bus_dev *nsim_bus_dev;
235         struct nsim_fib_data *fib_data;
236         struct nsim_trap_data *trap_data;
237         struct dentry *ddir;
238         struct dentry *ports_ddir;
239         struct dentry *take_snapshot;
240         struct dentry *nodes_ddir;
241
242         struct mutex vfs_lock;  /* Protects vfconfigs */
243         struct nsim_vf_config *vfconfigs;
244
245         struct bpf_offload_dev *bpf_dev;
246         bool bpf_bind_accept;
247         bool bpf_bind_verifier_accept;
248         u32 bpf_bind_verifier_delay;
249         struct dentry *ddir_bpf_bound_progs;
250         u32 prog_id_gen;
251         struct list_head bpf_bound_progs;
252         struct list_head bpf_bound_maps;
253         struct netdev_phys_item_id switch_id;
254         struct list_head port_list;
255         struct mutex port_list_lock; /* protects port list */
256         bool fw_update_status;
257         u32 fw_update_overwrite_mask;
258         u32 max_macs;
259         bool test1;
260         bool dont_allow_reload;
261         bool fail_reload;
262         struct devlink_region *dummy_region;
263         struct nsim_dev_health health;
264         struct flow_action_cookie *fa_cookie;
265         spinlock_t fa_cookie_lock; /* protects fa_cookie */
266         bool fail_trap_group_set;
267         bool fail_trap_policer_set;
268         bool fail_trap_policer_counter_get;
269         bool fail_trap_drop_counter_get;
270         struct {
271                 struct udp_tunnel_nic_shared utn_shared;
272                 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
273                 bool sync_all;
274                 bool open_only;
275                 bool ipv4_only;
276                 bool shared;
277                 bool static_iana_vxlan;
278                 u32 sleep;
279         } udp_ports;
280         struct nsim_dev_psample *psample;
281         u16 esw_mode;
282 };
283
284 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
285 {
286         return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
287 }
288
289 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
290 {
291         return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
292 }
293
294 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
295 {
296         return devlink_net(priv_to_devlink(nsim_dev));
297 }
298
299 int nsim_dev_init(void);
300 void nsim_dev_exit(void);
301 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev);
302 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev);
303 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev,
304                       enum nsim_dev_port_type type,
305                       unsigned int port_index);
306 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev,
307                       enum nsim_dev_port_type type,
308                       unsigned int port_index);
309 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
310                            unsigned int num_vfs);
311
312 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev);
313
314 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
315                                       struct netlink_ext_ack *extack);
316 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
317 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
318                      enum nsim_resource_id res_id, bool max);
319
320 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
321 {
322         return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
323 }
324
325 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
326 {
327         return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
328 }
329 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
330 void nsim_ipsec_init(struct netdevsim *ns);
331 void nsim_ipsec_teardown(struct netdevsim *ns);
332 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
333 #else
334 static inline void nsim_ipsec_init(struct netdevsim *ns)
335 {
336 }
337
338 static inline void nsim_ipsec_teardown(struct netdevsim *ns)
339 {
340 }
341
342 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
343 {
344         return true;
345 }
346 #endif
347
348 struct nsim_bus_dev {
349         struct device dev;
350         struct list_head list;
351         unsigned int port_count;
352         unsigned int num_queues; /* Number of queues for each port on this bus */
353         struct net *initial_net; /* Purpose of this is to carry net pointer
354                                   * during the probe time only.
355                                   */
356         unsigned int max_vfs;
357         unsigned int num_vfs;
358         /* Lock for devlink->reload_enabled in netdevsim module */
359         struct mutex nsim_bus_reload_lock;
360         bool in_reload;
361         bool init;
362 };
363
364 int nsim_bus_init(void);
365 void nsim_bus_exit(void);
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