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