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