/* * Copyright (C) 2017 Netronome Systems, Inc. * * This software is licensed under the GNU General License Version 2, * June 1991 as shown in the file COPYING in the top-level directory of this * source tree. * * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. */ #include <linux/debugfs.h>#include <linux/device.h>#include <linux/ethtool.h>#include <linux/ethtool_netlink.h>#include <linux/kernel.h>#include <linux/list.h>#include <linux/netdevice.h>#include <linux/ptp_mock.h>#include <linux/u64_stats_sync.h>#include <net/devlink.h>#include <net/udp_tunnel.h>#include <net/xdp.h>#include <net/macsec.h> #define DRV_NAME	"netdevsim" #define NSIM_XDP_MAX_MTU	4000 #define NSIM_EA(extack, msg)	NL_SET_ERR_MSG_MOD((extack), msg) #define NSIM_IPSEC_MAX_SA_COUNT		33#define NSIM_IPSEC_VALID		BIT(31)#define NSIM_UDP_TUNNEL_N_PORTS		4 #define NSIM_HDS_THRESHOLD_MAX		1024 struct nsim_sa {	struct xfrm_state *xs;	__be32 ipaddr[4];	u32 key[4];	u32 salt;	bool used;	bool crypt;	bool rx;}; struct nsim_ipsec {	struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];	struct dentry *pfile;	u32 count;	u32 tx;}; #define NSIM_MACSEC_MAX_SECY_COUNT 3#define NSIM_MACSEC_MAX_RXSC_COUNT 1struct nsim_rxsc {	sci_t sci;	bool used;}; struct nsim_secy {	sci_t sci;	struct nsim_rxsc nsim_rxsc[NSIM_MACSEC_MAX_RXSC_COUNT];	u8 nsim_rxsc_count;	bool used;}; struct nsim_macsec {	struct nsim_secy nsim_secy[NSIM_MACSEC_MAX_SECY_COUNT];	u8 nsim_secy_count;}; struct nsim_ethtool_pauseparam {	bool rx;	bool tx;	bool report_stats_rx;	bool report_stats_tx;}; struct nsim_ethtool {	u32 get_err;	u32 set_err;	u32 channels;	struct nsim_ethtool_pauseparam pauseparam;	struct ethtool_coalesce coalesce;	struct ethtool_ringparam ring;	struct ethtool_fecparam fec;}; struct nsim_rq {	struct napi_struct napi;	struct sk_buff_head skb_queue;	struct page_pool *page_pool;	struct hrtimer napi_timer;}; struct netdevsim {	struct net_device *netdev;	struct nsim_dev *nsim_dev;	struct nsim_dev_port *nsim_dev_port;	struct mock_phc *phc;	struct nsim_rq **rq; 	int rq_reset_mode; 	u64 tx_packets;	u64 tx_bytes;	u64 tx_dropped;	struct u64_stats_sync syncp; 	struct nsim_bus_dev *nsim_bus_dev; 	struct bpf_prog	*bpf_offloaded;	u32 bpf_offloaded_id; 	struct xdp_attachment_info xdp;	struct xdp_attachment_info xdp_hw; 	bool bpf_tc_accept;	bool bpf_tc_non_bound_accept;	bool bpf_xdpdrv_accept;	bool bpf_xdpoffload_accept; 	bool bpf_map_accept;	struct nsim_ipsec ipsec;	struct nsim_macsec macsec;	struct {		u32 inject_error;		u32 sleep;		u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];		u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];		struct dentry *ddir;		struct debugfs_u32_array dfs_ports[2];	} udp_ports; 	struct page *page;	struct dentry *pp_dfs;	struct dentry *qr_dfs; 	struct nsim_ethtool ethtool;	struct netdevsim __rcu *peer; 	struct notifier_block nb;	struct netdev_net_notifier nn;}; struct netdevsim *nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);void nsim_destroy(struct netdevsim *ns);bool netdev_is_nsim(struct net_device *dev); void nsim_ethtool_init(struct netdevsim *ns); void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,				 struct net_device *dev);void nsim_udp_tunnels_info_destroy(struct net_device *dev); #ifdef CONFIG_BPF_SYSCALLint nsim_bpf_dev_init(struct nsim_dev *nsim_dev);void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);int nsim_bpf_init(struct netdevsim *ns);void nsim_bpf_uninit(struct netdevsim *ns);int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);int nsim_bpf_disable_tc(struct netdevsim *ns);int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,			       void *type_data, void *cb_priv);#else static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev){	return 0;} static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev){}static inline int nsim_bpf_init(struct netdevsim *ns){	return 0;} static inline void nsim_bpf_uninit(struct netdevsim *ns){} static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf){	return -EOPNOTSUPP;} static inline int nsim_bpf_disable_tc(struct netdevsim *ns){	return 0;} static inline intnsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,			   void *cb_priv){	return -EOPNOTSUPP;}#endif enum nsim_resource_id {	NSIM_RESOURCE_NONE,   /* DEVLINK_RESOURCE_ID_PARENT_TOP */	NSIM_RESOURCE_IPV4,	NSIM_RESOURCE_IPV4_FIB,	NSIM_RESOURCE_IPV4_FIB_RULES,	NSIM_RESOURCE_IPV6,	NSIM_RESOURCE_IPV6_FIB,	NSIM_RESOURCE_IPV6_FIB_RULES,	NSIM_RESOURCE_NEXTHOPS,}; struct nsim_dev_health {	struct devlink_health_reporter *empty_reporter;	struct devlink_health_reporter *dummy_reporter;	struct dentry *ddir;	char *recovered_break_msg;	u32 binary_len;	bool fail_recover;}; int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);void nsim_dev_health_exit(struct nsim_dev *nsim_dev); struct nsim_dev_hwstats_netdev {	struct list_head list;	struct net_device *netdev;	struct rtnl_hw_stats64 stats;	bool enabled;	bool fail_enable;}; struct nsim_dev_hwstats {	struct dentry *ddir;	struct dentry *l3_ddir; 	struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */	struct list_head l3_list; 	struct notifier_block netdevice_nb;	struct delayed_work traffic_dw;}; int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev);void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev); #if IS_ENABLED(CONFIG_PSAMPLE)int nsim_dev_psample_init(struct nsim_dev *nsim_dev);void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);#elsestatic inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev){	return 0;} static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev){}#endif enum nsim_dev_port_type {	NSIM_DEV_PORT_TYPE_PF,	NSIM_DEV_PORT_TYPE_VF,}; #define NSIM_DEV_VF_PORT_INDEX_BASE 128#define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX struct nsim_dev_port {	struct list_head list;	struct devlink_port devlink_port;	unsigned int port_index;	enum nsim_dev_port_type port_type;	struct dentry *ddir;	struct dentry *rate_parent;	char *parent_name;	struct netdevsim *ns;}; struct nsim_vf_config {	int link_state;	u16 min_tx_rate;	u16 max_tx_rate;	u16 vlan;	__be16 vlan_proto;	u16 qos;	u8 vf_mac[ETH_ALEN];	bool spoofchk_enabled;	bool trusted;	bool rss_query_enabled;}; struct nsim_dev {	struct nsim_bus_dev *nsim_bus_dev;	struct nsim_fib_data *fib_data;	struct nsim_trap_data *trap_data;	struct dentry *ddir;	struct dentry *ports_ddir;	struct dentry *take_snapshot;	struct dentry *nodes_ddir; 	struct nsim_vf_config *vfconfigs; 	struct bpf_offload_dev *bpf_dev;	bool bpf_bind_accept;	bool bpf_bind_verifier_accept;	u32 bpf_bind_verifier_delay;	struct dentry *ddir_bpf_bound_progs;	u32 prog_id_gen;	struct list_head bpf_bound_progs;	struct list_head bpf_bound_maps;	struct netdev_phys_item_id switch_id;	struct list_head port_list;	bool fw_update_status;	u32 fw_update_overwrite_mask;	u32 max_macs;	bool test1;	bool dont_allow_reload;	bool fail_reload;	struct devlink_region *dummy_region;	struct nsim_dev_health health;	struct nsim_dev_hwstats hwstats;	struct flow_action_cookie *fa_cookie;	spinlock_t fa_cookie_lock; /* protects fa_cookie */	bool fail_trap_group_set;	bool fail_trap_policer_set;	bool fail_trap_policer_counter_get;	bool fail_trap_drop_counter_get;	struct {		struct udp_tunnel_nic_shared utn_shared;		u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];		bool sync_all;		bool open_only;		bool ipv4_only;		bool shared;		bool static_iana_vxlan;		u32 sleep;	} udp_ports;	struct nsim_dev_psample *psample;	u16 esw_mode;}; static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev){	return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;} static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev){	return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;} static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev){	return devlink_net(priv_to_devlink(nsim_dev));} int nsim_dev_init(void);void nsim_dev_exit(void);int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev);void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev);int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev,		      enum nsim_dev_port_type type,		      unsigned int port_index);int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev,		      enum nsim_dev_port_type type,		      unsigned int port_index);int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,			   unsigned int num_vfs); unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev); struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,				      struct netlink_ext_ack *extack);void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,		     enum nsim_resource_id res_id, bool max); static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port){	return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;} static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port){	return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;}#if IS_ENABLED(CONFIG_XFRM_OFFLOAD)void nsim_ipsec_init(struct netdevsim *ns);void nsim_ipsec_teardown(struct netdevsim *ns);bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);#elsestatic inline void nsim_ipsec_init(struct netdevsim *ns){} static inline void nsim_ipsec_teardown(struct netdevsim *ns){} static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb){	return true;}#endif #if IS_ENABLED(CONFIG_MACSEC)void nsim_macsec_init(struct netdevsim *ns);void nsim_macsec_teardown(struct netdevsim *ns);#elsestatic inline void nsim_macsec_init(struct netdevsim *ns){} static inline void nsim_macsec_teardown(struct netdevsim *ns){}#endif struct nsim_bus_dev {	struct device dev;	struct list_head list;	unsigned int port_count;	unsigned int num_queues; /* Number of queues for each port on this bus */	struct net *initial_net; /* Purpose of this is to carry net pointer				  * during the probe time only.				  */	unsigned int max_vfs;	unsigned int num_vfs;	bool init;}; int nsim_bus_init(void);void nsim_bus_exit(void);