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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/ethtool_netlink.h>
20#include <linux/kernel.h>
21#include <linux/list.h>
22#include <linux/netdevice.h>
23#include <linux/ptp_mock.h>
24#include <linux/u64_stats_sync.h>
25#include <net/devlink.h>
26#include <net/udp_tunnel.h>
27#include <net/xdp.h>
28#include <net/macsec.h>
29
30#define DRV_NAME "netdevsim"
31
32#define NSIM_XDP_MAX_MTU 4000
33
34#define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg)
35
36#define NSIM_IPSEC_MAX_SA_COUNT 33
37#define NSIM_IPSEC_VALID BIT(31)
38#define NSIM_UDP_TUNNEL_N_PORTS 4
39
40#define NSIM_HDS_THRESHOLD_MAX 1024
41
42struct nsim_sa {
43 struct xfrm_state *xs;
44 __be32 ipaddr[4];
45 u32 key[4];
46 u32 salt;
47 bool used;
48 bool crypt;
49 bool rx;
50};
51
52struct nsim_ipsec {
53 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];
54 struct dentry *pfile;
55 u32 count;
56 u32 tx;
57};
58
59#define NSIM_MACSEC_MAX_SECY_COUNT 3
60#define NSIM_MACSEC_MAX_RXSC_COUNT 1
61struct nsim_rxsc {
62 sci_t sci;
63 bool used;
64};
65
66struct nsim_secy {
67 sci_t sci;
68 struct nsim_rxsc nsim_rxsc[NSIM_MACSEC_MAX_RXSC_COUNT];
69 u8 nsim_rxsc_count;
70 bool used;
71};
72
73struct nsim_macsec {
74 struct nsim_secy nsim_secy[NSIM_MACSEC_MAX_SECY_COUNT];
75 u8 nsim_secy_count;
76};
77
78struct nsim_ethtool_pauseparam {
79 bool rx;
80 bool tx;
81 bool report_stats_rx;
82 bool report_stats_tx;
83};
84
85struct nsim_ethtool {
86 u32 get_err;
87 u32 set_err;
88 u32 channels;
89 struct nsim_ethtool_pauseparam pauseparam;
90 struct ethtool_coalesce coalesce;
91 struct ethtool_ringparam ring;
92 struct ethtool_fecparam fec;
93};
94
95struct nsim_rq {
96 struct napi_struct napi;
97 struct sk_buff_head skb_queue;
98 struct page_pool *page_pool;
99 struct hrtimer napi_timer;
100};
101
102struct netdevsim {
103 struct net_device *netdev;
104 struct nsim_dev *nsim_dev;
105 struct nsim_dev_port *nsim_dev_port;
106 struct mock_phc *phc;
107 struct nsim_rq **rq;
108
109 int rq_reset_mode;
110
111 struct {
112 u64 rx_packets;
113 u64 rx_bytes;
114 u64 tx_packets;
115 u64 tx_bytes;
116 struct u64_stats_sync syncp;
117 struct psp_dev *dev;
118 u32 spi;
119 u32 assoc_cnt;
120 } psp;
121
122 struct nsim_bus_dev *nsim_bus_dev;
123
124 struct bpf_prog *bpf_offloaded;
125 u32 bpf_offloaded_id;
126
127 struct xdp_attachment_info xdp;
128 struct xdp_attachment_info xdp_hw;
129
130 bool bpf_tc_accept;
131 bool bpf_tc_non_bound_accept;
132 bool bpf_xdpdrv_accept;
133 bool bpf_xdpoffload_accept;
134
135 bool bpf_map_accept;
136 struct nsim_ipsec ipsec;
137 struct nsim_macsec macsec;
138 struct {
139 u32 inject_error;
140 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
141 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
142 struct dentry *ddir;
143 struct debugfs_u32_array dfs_ports[2];
144 } udp_ports;
145
146 struct page *page;
147 struct dentry *pp_dfs;
148 struct dentry *qr_dfs;
149
150 struct nsim_ethtool ethtool;
151 struct netdevsim __rcu *peer;
152
153 struct notifier_block nb;
154 struct netdev_net_notifier nn;
155};
156
157struct netdevsim *nsim_create(struct nsim_dev *nsim_dev,
158 struct nsim_dev_port *nsim_dev_port,
159 u8 perm_addr[ETH_ALEN]);
160void nsim_destroy(struct netdevsim *ns);
161bool netdev_is_nsim(struct net_device *dev);
162
163void nsim_ethtool_init(struct netdevsim *ns);
164
165void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
166int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
167 struct net_device *dev);
168void nsim_udp_tunnels_info_destroy(struct net_device *dev);
169
170#ifdef CONFIG_BPF_SYSCALL
171int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
172void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
173int nsim_bpf_init(struct netdevsim *ns);
174void nsim_bpf_uninit(struct netdevsim *ns);
175int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
176int nsim_bpf_disable_tc(struct netdevsim *ns);
177int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
178 void *type_data, void *cb_priv);
179#else
180
181static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
182{
183 return 0;
184}
185
186static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
187{
188}
189static inline int nsim_bpf_init(struct netdevsim *ns)
190{
191 return 0;
192}
193
194static inline void nsim_bpf_uninit(struct netdevsim *ns)
195{
196}
197
198static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
199{
200 return -EOPNOTSUPP;
201}
202
203static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
204{
205 return 0;
206}
207
208static inline int
209nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
210 void *cb_priv)
211{
212 return -EOPNOTSUPP;
213}
214#endif
215
216enum nsim_resource_id {
217 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
218 NSIM_RESOURCE_IPV4,
219 NSIM_RESOURCE_IPV4_FIB,
220 NSIM_RESOURCE_IPV4_FIB_RULES,
221 NSIM_RESOURCE_IPV6,
222 NSIM_RESOURCE_IPV6_FIB,
223 NSIM_RESOURCE_IPV6_FIB_RULES,
224 NSIM_RESOURCE_NEXTHOPS,
225};
226
227struct nsim_dev_health {
228 struct devlink_health_reporter *empty_reporter;
229 struct devlink_health_reporter *dummy_reporter;
230 struct dentry *ddir;
231 char *recovered_break_msg;
232 u32 binary_len;
233 bool fail_recover;
234};
235
236int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
237void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
238
239struct nsim_dev_hwstats_netdev {
240 struct list_head list;
241 struct net_device *netdev;
242 struct rtnl_hw_stats64 stats;
243 bool enabled;
244 bool fail_enable;
245};
246
247struct nsim_dev_hwstats {
248 struct dentry *ddir;
249 struct dentry *l3_ddir;
250
251 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */
252 struct list_head l3_list;
253
254 struct notifier_block netdevice_nb;
255 struct delayed_work traffic_dw;
256};
257
258int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev);
259void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev);
260
261#if IS_ENABLED(CONFIG_PSAMPLE)
262int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
263void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
264#else
265static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
266{
267 return 0;
268}
269
270static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
271{
272}
273#endif
274
275enum nsim_dev_port_type {
276 NSIM_DEV_PORT_TYPE_PF,
277 NSIM_DEV_PORT_TYPE_VF,
278};
279
280#define NSIM_DEV_VF_PORT_INDEX_BASE 128
281#define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX
282
283struct nsim_dev_port {
284 struct list_head list;
285 struct devlink_port devlink_port;
286 unsigned int port_index;
287 enum nsim_dev_port_type port_type;
288 struct dentry *ddir;
289 struct dentry *rate_parent;
290 char *parent_name;
291 u32 tc_bw[DEVLINK_RATE_TCS_MAX];
292 struct netdevsim *ns;
293};
294
295struct nsim_vf_config {
296 int link_state;
297 u16 min_tx_rate;
298 u16 max_tx_rate;
299 u16 vlan;
300 __be16 vlan_proto;
301 u16 qos;
302 u8 vf_mac[ETH_ALEN];
303 bool spoofchk_enabled;
304 bool trusted;
305 bool rss_query_enabled;
306};
307
308struct nsim_dev {
309 struct nsim_bus_dev *nsim_bus_dev;
310 struct nsim_fib_data *fib_data;
311 struct nsim_trap_data *trap_data;
312 struct dentry *ddir;
313 struct dentry *ports_ddir;
314 struct dentry *take_snapshot;
315 struct dentry *nodes_ddir;
316
317 struct nsim_vf_config *vfconfigs;
318
319 struct bpf_offload_dev *bpf_dev;
320 bool bpf_bind_accept;
321 bool bpf_bind_verifier_accept;
322 u32 bpf_bind_verifier_delay;
323 struct dentry *ddir_bpf_bound_progs;
324 u32 prog_id_gen;
325 struct list_head bpf_bound_progs;
326 struct list_head bpf_bound_maps;
327 struct mutex progs_list_lock;
328 struct netdev_phys_item_id switch_id;
329 struct list_head port_list;
330 bool fw_update_status;
331 u32 fw_update_overwrite_mask;
332 u32 fw_update_flash_chunk_time_ms;
333 u32 max_macs;
334 bool test1;
335 u32 test2;
336 bool dont_allow_reload;
337 bool fail_reload;
338 struct devlink_region *dummy_region;
339 struct nsim_dev_health health;
340 struct nsim_dev_hwstats hwstats;
341 struct flow_action_cookie *fa_cookie;
342 spinlock_t fa_cookie_lock; /* protects fa_cookie */
343 bool fail_trap_group_set;
344 bool fail_trap_policer_set;
345 bool fail_trap_policer_counter_get;
346 bool fail_trap_drop_counter_get;
347 struct {
348 struct udp_tunnel_nic_shared utn_shared;
349 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
350 bool sync_all;
351 bool open_only;
352 bool ipv4_only;
353 bool shared;
354 bool static_iana_vxlan;
355 } udp_ports;
356 struct nsim_dev_psample *psample;
357 u16 esw_mode;
358};
359
360static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
361{
362 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
363}
364
365static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
366{
367 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
368}
369
370static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
371{
372 return devlink_net(devlink: priv_to_devlink(priv: nsim_dev));
373}
374
375int nsim_dev_init(void);
376void nsim_dev_exit(void);
377int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev);
378void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev);
379int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev,
380 enum nsim_dev_port_type type, unsigned int port_index,
381 u8 perm_addr[ETH_ALEN]);
382int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev,
383 enum nsim_dev_port_type type,
384 unsigned int port_index);
385int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
386 unsigned int num_vfs);
387
388unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev);
389
390struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
391 struct netlink_ext_ack *extack);
392void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
393u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
394 enum nsim_resource_id res_id, bool max);
395
396static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
397{
398 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
399}
400
401static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
402{
403 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
404}
405#if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
406void nsim_ipsec_init(struct netdevsim *ns);
407void nsim_ipsec_teardown(struct netdevsim *ns);
408bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
409#else
410static inline void nsim_ipsec_init(struct netdevsim *ns)
411{
412}
413
414static inline void nsim_ipsec_teardown(struct netdevsim *ns)
415{
416}
417
418static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
419{
420 return true;
421}
422#endif
423
424#if IS_ENABLED(CONFIG_MACSEC)
425void nsim_macsec_init(struct netdevsim *ns);
426void nsim_macsec_teardown(struct netdevsim *ns);
427#else
428static inline void nsim_macsec_init(struct netdevsim *ns)
429{
430}
431
432static inline void nsim_macsec_teardown(struct netdevsim *ns)
433{
434}
435#endif
436
437#if IS_ENABLED(CONFIG_INET_PSP)
438int nsim_psp_init(struct netdevsim *ns);
439void nsim_psp_uninit(struct netdevsim *ns);
440void nsim_psp_handle_ext(struct sk_buff *skb, struct skb_ext *psp_ext);
441enum skb_drop_reason
442nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns,
443 struct netdevsim *peer_ns, struct skb_ext **psp_ext);
444#else
445static inline int nsim_psp_init(struct netdevsim *ns) { return 0; }
446static inline void nsim_psp_uninit(struct netdevsim *ns) {}
447static inline enum skb_drop_reason
448nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns,
449 struct netdevsim *peer_ns, struct skb_ext **psp_ext)
450{
451 return 0;
452}
453
454static inline void
455nsim_psp_handle_ext(struct sk_buff *skb, struct skb_ext *psp_ext) {}
456#endif
457
458struct nsim_bus_dev {
459 struct device dev;
460 struct list_head list;
461 unsigned int port_count;
462 unsigned int num_queues; /* Number of queues for each port on this bus */
463 struct net *initial_net; /* Purpose of this is to carry net pointer
464 * during the probe time only.
465 */
466 unsigned int max_vfs;
467 unsigned int num_vfs;
468 bool init;
469};
470
471int nsim_bus_init(void);
472void nsim_bus_exit(void);
473

source code of linux/drivers/net/netdevsim/netdevsim.h