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
nsim_bpf_dev_init(struct nsim_dev * nsim_dev)129 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
130 {
131 return 0;
132 }
133
nsim_bpf_dev_exit(struct nsim_dev * nsim_dev)134 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
135 {
136 }
nsim_bpf_init(struct netdevsim * ns)137 static inline int nsim_bpf_init(struct netdevsim *ns)
138 {
139 return 0;
140 }
141
nsim_bpf_uninit(struct netdevsim * ns)142 static inline void nsim_bpf_uninit(struct netdevsim *ns)
143 {
144 }
145
nsim_bpf(struct net_device * dev,struct netdev_bpf * bpf)146 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
147 {
148 return -EOPNOTSUPP;
149 }
150
nsim_bpf_disable_tc(struct netdevsim * ns)151 static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
152 {
153 return 0;
154 }
155
156 static inline int
nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)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 struct nsim_dev_hwstats_netdev {
188 struct list_head list;
189 struct net_device *netdev;
190 struct rtnl_hw_stats64 stats;
191 bool enabled;
192 bool fail_enable;
193 };
194
195 struct nsim_dev_hwstats {
196 struct dentry *ddir;
197 struct dentry *l3_ddir;
198
199 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */
200 struct list_head l3_list;
201
202 struct notifier_block netdevice_nb;
203 struct delayed_work traffic_dw;
204 };
205
206 int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev);
207 void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev);
208
209 #if IS_ENABLED(CONFIG_PSAMPLE)
210 int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
211 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
212 #else
nsim_dev_psample_init(struct nsim_dev * nsim_dev)213 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
214 {
215 return 0;
216 }
217
nsim_dev_psample_exit(struct nsim_dev * nsim_dev)218 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
219 {
220 }
221 #endif
222
223 enum nsim_dev_port_type {
224 NSIM_DEV_PORT_TYPE_PF,
225 NSIM_DEV_PORT_TYPE_VF,
226 };
227
228 #define NSIM_DEV_VF_PORT_INDEX_BASE 128
229 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX
230
231 struct nsim_dev_port {
232 struct list_head list;
233 struct devlink_port devlink_port;
234 unsigned int port_index;
235 enum nsim_dev_port_type port_type;
236 struct dentry *ddir;
237 struct dentry *rate_parent;
238 char *parent_name;
239 struct netdevsim *ns;
240 };
241
242 struct nsim_vf_config {
243 int link_state;
244 u16 min_tx_rate;
245 u16 max_tx_rate;
246 u16 vlan;
247 __be16 vlan_proto;
248 u16 qos;
249 u8 vf_mac[ETH_ALEN];
250 bool spoofchk_enabled;
251 bool trusted;
252 bool rss_query_enabled;
253 };
254
255 struct nsim_dev {
256 struct nsim_bus_dev *nsim_bus_dev;
257 struct nsim_fib_data *fib_data;
258 struct nsim_trap_data *trap_data;
259 struct dentry *ddir;
260 struct dentry *ports_ddir;
261 struct dentry *take_snapshot;
262 struct dentry *nodes_ddir;
263
264 struct nsim_vf_config *vfconfigs;
265
266 struct bpf_offload_dev *bpf_dev;
267 bool bpf_bind_accept;
268 bool bpf_bind_verifier_accept;
269 u32 bpf_bind_verifier_delay;
270 struct dentry *ddir_bpf_bound_progs;
271 u32 prog_id_gen;
272 struct list_head bpf_bound_progs;
273 struct list_head bpf_bound_maps;
274 struct netdev_phys_item_id switch_id;
275 struct list_head port_list;
276 bool fw_update_status;
277 u32 fw_update_overwrite_mask;
278 u32 max_macs;
279 bool test1;
280 bool dont_allow_reload;
281 bool fail_reload;
282 struct devlink_region *dummy_region;
283 struct nsim_dev_health health;
284 struct nsim_dev_hwstats hwstats;
285 struct flow_action_cookie *fa_cookie;
286 spinlock_t fa_cookie_lock; /* protects fa_cookie */
287 bool fail_trap_group_set;
288 bool fail_trap_policer_set;
289 bool fail_trap_policer_counter_get;
290 bool fail_trap_drop_counter_get;
291 struct {
292 struct udp_tunnel_nic_shared utn_shared;
293 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
294 bool sync_all;
295 bool open_only;
296 bool ipv4_only;
297 bool shared;
298 bool static_iana_vxlan;
299 u32 sleep;
300 } udp_ports;
301 struct nsim_dev_psample *psample;
302 u16 esw_mode;
303 };
304
nsim_esw_mode_is_legacy(struct nsim_dev * nsim_dev)305 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
306 {
307 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
308 }
309
nsim_esw_mode_is_switchdev(struct nsim_dev * nsim_dev)310 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
311 {
312 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
313 }
314
nsim_dev_net(struct nsim_dev * nsim_dev)315 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
316 {
317 return devlink_net(priv_to_devlink(nsim_dev));
318 }
319
320 int nsim_dev_init(void);
321 void nsim_dev_exit(void);
322 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev);
323 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev);
324 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev,
325 enum nsim_dev_port_type type,
326 unsigned int port_index);
327 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev,
328 enum nsim_dev_port_type type,
329 unsigned int port_index);
330 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
331 unsigned int num_vfs);
332
333 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev);
334
335 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
336 struct netlink_ext_ack *extack);
337 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
338 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
339 enum nsim_resource_id res_id, bool max);
340
nsim_dev_port_is_pf(struct nsim_dev_port * nsim_dev_port)341 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
342 {
343 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
344 }
345
nsim_dev_port_is_vf(struct nsim_dev_port * nsim_dev_port)346 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
347 {
348 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
349 }
350 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
351 void nsim_ipsec_init(struct netdevsim *ns);
352 void nsim_ipsec_teardown(struct netdevsim *ns);
353 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
354 #else
nsim_ipsec_init(struct netdevsim * ns)355 static inline void nsim_ipsec_init(struct netdevsim *ns)
356 {
357 }
358
nsim_ipsec_teardown(struct netdevsim * ns)359 static inline void nsim_ipsec_teardown(struct netdevsim *ns)
360 {
361 }
362
nsim_ipsec_tx(struct netdevsim * ns,struct sk_buff * skb)363 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
364 {
365 return true;
366 }
367 #endif
368
369 struct nsim_bus_dev {
370 struct device dev;
371 struct list_head list;
372 unsigned int port_count;
373 unsigned int num_queues; /* Number of queues for each port on this bus */
374 struct net *initial_net; /* Purpose of this is to carry net pointer
375 * during the probe time only.
376 */
377 unsigned int max_vfs;
378 unsigned int num_vfs;
379 bool init;
380 };
381
382 int nsim_bus_init(void);
383 void nsim_bus_exit(void);
384