diff options
Diffstat (limited to 'drivers/net/ethernet/sun/sunvnet_common.h')
| -rw-r--r-- | drivers/net/ethernet/sun/sunvnet_common.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sun/sunvnet_common.h b/drivers/net/ethernet/sun/sunvnet_common.h new file mode 100644 index 000000000..5416a3cb9 --- /dev/null +++ b/drivers/net/ethernet/sun/sunvnet_common.h @@ -0,0 +1,157 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _SUNVNETCOMMON_H +#define _SUNVNETCOMMON_H + +#include <linux/interrupt.h> + +/* length of time (or less) we expect pending descriptors to be marked + * as VIO_DESC_DONE and skbs ready to be freed + */ +#define VNET_CLEAN_TIMEOUT ((HZ / 100) + 1) + +#define VNET_MAXPACKET (65535ULL + ETH_HLEN + VLAN_HLEN) +#define VNET_TX_RING_SIZE 512 +#define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4) + +#define VNET_MINTSO 2048 /* VIO protocol's minimum TSO len */ +#define VNET_MAXTSO 65535 /* VIO protocol's maximum TSO len */ + +#define VNET_MAX_MTU 65535 + +/* VNET packets are sent in buffers with the first 6 bytes skipped + * so that after the ethernet header the IPv4/IPv6 headers are aligned + * properly. + */ +#define VNET_PACKET_SKIP 6 + +#define VNET_MAXCOOKIES (VNET_MAXPACKET / PAGE_SIZE + 1) + +#define VNET_MAX_TXQS 16 + +struct vnet_tx_entry { + struct sk_buff *skb; + unsigned int ncookies; + struct ldc_trans_cookie cookies[VNET_MAXCOOKIES]; +}; + +struct vnet; + +struct vnet_port_stats { + /* keep them all the same size */ + u32 rx_bytes; + u32 tx_bytes; + u32 rx_packets; + u32 tx_packets; + u32 event_up; + u32 event_reset; + u32 q_placeholder; +}; + +#define NUM_VNET_PORT_STATS (sizeof(struct vnet_port_stats) / sizeof(u32)) + +/* Structure to describe a vnet-port or vsw-port in the MD. + * If the vsw bit is set, this structure represents a vswitch + * port, and the net_device can be found from ->dev. If the + * vsw bit is not set, the net_device is available from ->vp->dev. + * See the VNET_PORT_TO_NET_DEVICE macro below. + */ +struct vnet_port { + struct vio_driver_state vio; + + struct vnet_port_stats stats; + + struct hlist_node hash; + u8 raddr[ETH_ALEN]; + unsigned switch_port:1; + unsigned tso:1; + unsigned vsw:1; + unsigned __pad:13; + + struct vnet *vp; + struct net_device *dev; + + struct vnet_tx_entry tx_bufs[VNET_TX_RING_SIZE]; + + struct list_head list; + + u32 stop_rx_idx; + bool stop_rx; + bool start_cons; + + struct timer_list clean_timer; + + u64 rmtu; + u16 tsolen; + + struct napi_struct napi; + u32 napi_stop_idx; + bool napi_resume; + int rx_event; + u16 q_index; +}; + +static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio) +{ + return container_of(vio, struct vnet_port, vio); +} + +#define VNET_PORT_HASH_SIZE 16 +#define VNET_PORT_HASH_MASK (VNET_PORT_HASH_SIZE - 1) + +static inline unsigned int vnet_hashfn(u8 *mac) +{ + unsigned int val = mac[4] ^ mac[5]; + + return val & (VNET_PORT_HASH_MASK); +} + +struct vnet_mcast_entry { + u8 addr[ETH_ALEN]; + u8 sent; + u8 hit; + struct vnet_mcast_entry *next; +}; + +struct vnet { + spinlock_t lock; /* Protects port_list and port_hash. */ + struct net_device *dev; + u32 msg_enable; + u8 q_used[VNET_MAX_TXQS]; + struct list_head port_list; + struct hlist_head port_hash[VNET_PORT_HASH_SIZE]; + struct vnet_mcast_entry *mcast_list; + struct list_head list; + u64 local_mac; + int nports; +}; + +/* Def used by common code to get the net_device from the proper location */ +#define VNET_PORT_TO_NET_DEVICE(__port) \ + ((__port)->vsw ? (__port)->dev : (__port)->vp->dev) + +/* Common funcs */ +void sunvnet_clean_timer_expire_common(struct timer_list *t); +int sunvnet_open_common(struct net_device *dev); +int sunvnet_close_common(struct net_device *dev); +void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp); +int sunvnet_set_mac_addr_common(struct net_device *dev, void *p); +void sunvnet_tx_timeout_common(struct net_device *dev, unsigned int txqueue); +netdev_tx_t +sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev, + struct vnet_port *(*vnet_tx_port) + (struct sk_buff *, struct net_device *)); +#ifdef CONFIG_NET_POLL_CONTROLLER +void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp); +#endif +void sunvnet_event_common(void *arg, int event); +int sunvnet_send_attr_common(struct vio_driver_state *vio); +int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg); +void sunvnet_handshake_complete_common(struct vio_driver_state *vio); +int sunvnet_poll_common(struct napi_struct *napi, int budget); +void sunvnet_port_free_tx_bufs_common(struct vnet_port *port); +void vnet_port_reset(struct vnet_port *port); +bool sunvnet_port_is_up_common(struct vnet_port *vnet); +void sunvnet_port_add_txq_common(struct vnet_port *port); +void sunvnet_port_rm_txq_common(struct vnet_port *port); + +#endif /* _SUNVNETCOMMON_H */ |