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