Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 u64 tx_packets;
112 u64 tx_bytes;
113 u64 tx_dropped;
114 struct u64_stats_sync syncp;
115
116 struct nsim_bus_dev *nsim_bus_dev;
117
118 struct bpf_prog *bpf_offloaded;
119 u32 bpf_offloaded_id;
120
121 struct xdp_attachment_info xdp;
122 struct xdp_attachment_info xdp_hw;
123
124 bool bpf_tc_accept;
125 bool bpf_tc_non_bound_accept;
126 bool bpf_xdpdrv_accept;
127 bool bpf_xdpoffload_accept;
128
129 bool bpf_map_accept;
130 struct nsim_ipsec ipsec;
131 struct nsim_macsec macsec;
132 struct {
133 u32 inject_error;
134 u32 sleep;
135 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
136 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
137 struct dentry *ddir;
138 struct debugfs_u32_array dfs_ports[2];
139 } udp_ports;
140
141 struct page *page;
142 struct dentry *pp_dfs;
143 struct dentry *qr_dfs;
144
145 struct nsim_ethtool ethtool;
146 struct netdevsim __rcu *peer;
147
148 struct notifier_block nb;
149 struct netdev_net_notifier nn;
150};
151
152struct netdevsim *
153nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
154void nsim_destroy(struct netdevsim *ns);
155bool netdev_is_nsim(struct net_device *dev);
156
157void nsim_ethtool_init(struct netdevsim *ns);
158
159void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
160int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
161 struct net_device *dev);
162void nsim_udp_tunnels_info_destroy(struct net_device *dev);
163
164#ifdef CONFIG_BPF_SYSCALL
165int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
166void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
167int nsim_bpf_init(struct netdevsim *ns);
168void nsim_bpf_uninit(struct netdevsim *ns);
169int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
170int nsim_bpf_disable_tc(struct netdevsim *ns);
171int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
172 void *type_data, void *cb_priv);
173#else
174
175static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
176{
177 return 0;
178}
179
180static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
181{
182}
183static inline int nsim_bpf_init(struct netdevsim *ns)
184{
185 return 0;
186}
187
188static inline void nsim_bpf_uninit(struct netdevsim *ns)
189{
190}
191
192static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
193{
194 return -EOPNOTSUPP;
195}
196
197static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
198{
199 return 0;
200}
201
202static inline int
203nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
204 void *cb_priv)
205{
206 return -EOPNOTSUPP;
207}
208#endif
209
210enum nsim_resource_id {
211 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
212 NSIM_RESOURCE_IPV4,
213 NSIM_RESOURCE_IPV4_FIB,
214 NSIM_RESOURCE_IPV4_FIB_RULES,
215 NSIM_RESOURCE_IPV6,
216 NSIM_RESOURCE_IPV6_FIB,
217 NSIM_RESOURCE_IPV6_FIB_RULES,
218 NSIM_RESOURCE_NEXTHOPS,
219};
220
221struct nsim_dev_health {
222 struct devlink_health_reporter *empty_reporter;
223 struct devlink_health_reporter *dummy_reporter;
224 struct dentry *ddir;
225 char *recovered_break_msg;
226 u32 binary_len;
227 bool fail_recover;
228};
229
230int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
231void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
232
233struct nsim_dev_hwstats_netdev {
234 struct list_head list;
235 struct net_device *netdev;
236 struct rtnl_hw_stats64 stats;
237 bool enabled;
238 bool fail_enable;
239};
240
241struct nsim_dev_hwstats {
242 struct dentry *ddir;
243 struct dentry *l3_ddir;
244
245 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */
246 struct list_head l3_list;
247
248 struct notifier_block netdevice_nb;
249 struct delayed_work traffic_dw;
250};
251
252int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev);
253void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev);
254
255#if IS_ENABLED(CONFIG_PSAMPLE)
256int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
257void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
258#else
259static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
260{
261 return 0;
262}
263
264static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
265{
266}
267#endif
268
269enum nsim_dev_port_type {
270 NSIM_DEV_PORT_TYPE_PF,
271 NSIM_DEV_PORT_TYPE_VF,
272};
273
274#define NSIM_DEV_VF_PORT_INDEX_BASE 128
275#define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX
276
277struct nsim_dev_port {
278 struct list_head list;
279 struct devlink_port devlink_port;
280 unsigned int port_index;
281 enum nsim_dev_port_type port_type;
282 struct dentry *ddir;
283 struct dentry *rate_parent;
284 char *parent_name;
285 struct netdevsim *ns;
286};
287
288struct nsim_vf_config {
289 int link_state;
290 u16 min_tx_rate;
291 u16 max_tx_rate;
292 u16 vlan;
293 __be16 vlan_proto;
294 u16 qos;
295 u8 vf_mac[ETH_ALEN];
296 bool spoofchk_enabled;
297 bool trusted;
298 bool rss_query_enabled;
299};
300
301struct nsim_dev {
302 struct nsim_bus_dev *nsim_bus_dev;
303 struct nsim_fib_data *fib_data;
304 struct nsim_trap_data *trap_data;
305 struct dentry *ddir;
306 struct dentry *ports_ddir;
307 struct dentry *take_snapshot;
308 struct dentry *nodes_ddir;
309
310 struct nsim_vf_config *vfconfigs;
311
312 struct bpf_offload_dev *bpf_dev;
313 bool bpf_bind_accept;
314 bool bpf_bind_verifier_accept;
315 u32 bpf_bind_verifier_delay;
316 struct dentry *ddir_bpf_bound_progs;
317 u32 prog_id_gen;
318 struct list_head bpf_bound_progs;
319 struct list_head bpf_bound_maps;
320 struct netdev_phys_item_id switch_id;
321 struct list_head port_list;
322 bool fw_update_status;
323 u32 fw_update_overwrite_mask;
324 u32 max_macs;
325 bool test1;
326 bool dont_allow_reload;
327 bool fail_reload;
328 struct devlink_region *dummy_region;
329 struct nsim_dev_health health;
330 struct nsim_dev_hwstats hwstats;
331 struct flow_action_cookie *fa_cookie;
332 spinlock_t fa_cookie_lock; /* protects fa_cookie */
333 bool fail_trap_group_set;
334 bool fail_trap_policer_set;
335 bool fail_trap_policer_counter_get;
336 bool fail_trap_drop_counter_get;
337 struct {
338 struct udp_tunnel_nic_shared utn_shared;
339 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
340 bool sync_all;
341 bool open_only;
342 bool ipv4_only;
343 bool shared;
344 bool static_iana_vxlan;
345 u32 sleep;
346 } udp_ports;
347 struct nsim_dev_psample *psample;
348 u16 esw_mode;
349};
350
351static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
352{
353 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
354}
355
356static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
357{
358 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
359}
360
361static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
362{
363 return devlink_net(priv_to_devlink(nsim_dev));
364}
365
366int nsim_dev_init(void);
367void nsim_dev_exit(void);
368int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev);
369void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev);
370int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev,
371 enum nsim_dev_port_type type,
372 unsigned int port_index);
373int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev,
374 enum nsim_dev_port_type type,
375 unsigned int port_index);
376int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
377 unsigned int num_vfs);
378
379unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev);
380
381struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
382 struct netlink_ext_ack *extack);
383void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
384u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
385 enum nsim_resource_id res_id, bool max);
386
387static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
388{
389 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
390}
391
392static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
393{
394 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
395}
396#if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
397void nsim_ipsec_init(struct netdevsim *ns);
398void nsim_ipsec_teardown(struct netdevsim *ns);
399bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
400#else
401static inline void nsim_ipsec_init(struct netdevsim *ns)
402{
403}
404
405static inline void nsim_ipsec_teardown(struct netdevsim *ns)
406{
407}
408
409static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
410{
411 return true;
412}
413#endif
414
415#if IS_ENABLED(CONFIG_MACSEC)
416void nsim_macsec_init(struct netdevsim *ns);
417void nsim_macsec_teardown(struct netdevsim *ns);
418#else
419static inline void nsim_macsec_init(struct netdevsim *ns)
420{
421}
422
423static inline void nsim_macsec_teardown(struct netdevsim *ns)
424{
425}
426#endif
427
428struct nsim_bus_dev {
429 struct device dev;
430 struct list_head list;
431 unsigned int port_count;
432 unsigned int num_queues; /* Number of queues for each port on this bus */
433 struct net *initial_net; /* Purpose of this is to carry net pointer
434 * during the probe time only.
435 */
436 unsigned int max_vfs;
437 unsigned int num_vfs;
438 bool init;
439};
440
441int nsim_bus_init(void);
442void nsim_bus_exit(void);