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/device.h>
 17#include <linux/kernel.h>
 18#include <linux/list.h>
 19#include <linux/netdevice.h>
 20#include <linux/u64_stats_sync.h>
 21
 22#define DRV_NAME	"netdevsim"
 23
 24#define NSIM_XDP_MAX_MTU	4000
 25
 26#define NSIM_EA(extack, msg)	NL_SET_ERR_MSG_MOD((extack), msg)
 27
 28struct bpf_prog;
 29struct dentry;
 30struct nsim_vf_config;
 31
 32struct netdevsim {
 33	struct net_device *netdev;
 34
 35	u64 tx_packets;
 36	u64 tx_bytes;
 37	struct u64_stats_sync syncp;
 38
 39	struct device dev;
 40
 41	struct dentry *ddir;
 42
 43	unsigned int num_vfs;
 44	struct nsim_vf_config *vfconfigs;
 45
 46	struct bpf_prog	*bpf_offloaded;
 47	u32 bpf_offloaded_id;
 48
 49	u32 xdp_flags;
 50	int xdp_prog_mode;
 51	struct bpf_prog	*xdp_prog;
 52
 53	u32 prog_id_gen;
 54
 55	bool bpf_bind_accept;
 56	u32 bpf_bind_verifier_delay;
 57	struct dentry *ddir_bpf_bound_progs;
 58	struct list_head bpf_bound_progs;
 59
 60	bool bpf_tc_accept;
 61	bool bpf_tc_non_bound_accept;
 62	bool bpf_xdpdrv_accept;
 63	bool bpf_xdpoffload_accept;
 64
 65	bool bpf_map_accept;
 66	struct list_head bpf_bound_maps;
 67#if IS_ENABLED(CONFIG_NET_DEVLINK)
 68	struct devlink *devlink;
 69#endif
 70};
 71
 72extern struct dentry *nsim_ddir;
 73
 74#ifdef CONFIG_BPF_SYSCALL
 75int nsim_bpf_init(struct netdevsim *ns);
 76void nsim_bpf_uninit(struct netdevsim *ns);
 77int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
 78int nsim_bpf_disable_tc(struct netdevsim *ns);
 79int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
 80			       void *type_data, void *cb_priv);
 81#else
 82static inline int nsim_bpf_init(struct netdevsim *ns)
 83{
 84	return 0;
 85}
 86
 87static inline void nsim_bpf_uninit(struct netdevsim *ns)
 88{
 89}
 90
 91static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
 92{
 93	return bpf->command == XDP_QUERY_PROG ? 0 : -EOPNOTSUPP;
 94}
 95
 96static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
 97{
 98	return 0;
 99}
100
101static inline int
102nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
103			   void *cb_priv)
104{
105	return -EOPNOTSUPP;
106}
107#endif
108
109#if IS_ENABLED(CONFIG_NET_DEVLINK)
110enum nsim_resource_id {
111	NSIM_RESOURCE_NONE,   /* DEVLINK_RESOURCE_ID_PARENT_TOP */
112	NSIM_RESOURCE_IPV4,
113	NSIM_RESOURCE_IPV4_FIB,
114	NSIM_RESOURCE_IPV4_FIB_RULES,
115	NSIM_RESOURCE_IPV6,
116	NSIM_RESOURCE_IPV6_FIB,
117	NSIM_RESOURCE_IPV6_FIB_RULES,
118};
119
120int nsim_devlink_setup(struct netdevsim *ns);
121void nsim_devlink_teardown(struct netdevsim *ns);
122
123int nsim_devlink_init(void);
124void nsim_devlink_exit(void);
125
126int nsim_fib_init(void);
127void nsim_fib_exit(void);
128u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max);
129int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val);
130#else
131static inline int nsim_devlink_setup(struct netdevsim *ns)
132{
133	return 0;
134}
135
136static inline void nsim_devlink_teardown(struct netdevsim *ns)
137{
138}
139
140static inline int nsim_devlink_init(void)
141{
142	return 0;
143}
144
145static inline void nsim_devlink_exit(void)
146{
147}
148#endif
149
150static inline struct netdevsim *to_nsim(struct device *ptr)
151{
152	return container_of(ptr, struct netdevsim, dev);
153}