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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _SUNVNETCOMMON_H3#define _SUNVNETCOMMON_H4 5#include <linux/interrupt.h>6 7/* length of time (or less) we expect pending descriptors to be marked8 * as VIO_DESC_DONE and skbs ready to be freed9 */10#define VNET_CLEAN_TIMEOUT ((HZ / 100) + 1)11 12#define VNET_MAXPACKET (65535ULL + ETH_HLEN + VLAN_HLEN)13#define VNET_TX_RING_SIZE 51214#define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4)15 16#define VNET_MINTSO 2048 /* VIO protocol's minimum TSO len */17#define VNET_MAXTSO 65535 /* VIO protocol's maximum TSO len */18 19#define VNET_MAX_MTU 6553520 21/* VNET packets are sent in buffers with the first 6 bytes skipped22 * so that after the ethernet header the IPv4/IPv6 headers are aligned23 * properly.24 */25#define VNET_PACKET_SKIP 626 27#define VNET_MAXCOOKIES (VNET_MAXPACKET / PAGE_SIZE + 1)28 29#define VNET_MAX_TXQS 1630 31struct vnet_tx_entry {32 struct sk_buff *skb;33 unsigned int ncookies;34 struct ldc_trans_cookie cookies[VNET_MAXCOOKIES];35};36 37struct vnet;38 39struct vnet_port_stats {40 /* keep them all the same size */41 u32 rx_bytes;42 u32 tx_bytes;43 u32 rx_packets;44 u32 tx_packets;45 u32 event_up;46 u32 event_reset;47 u32 q_placeholder;48};49 50#define NUM_VNET_PORT_STATS (sizeof(struct vnet_port_stats) / sizeof(u32))51 52/* Structure to describe a vnet-port or vsw-port in the MD.53 * If the vsw bit is set, this structure represents a vswitch54 * port, and the net_device can be found from ->dev. If the55 * vsw bit is not set, the net_device is available from ->vp->dev.56 * See the VNET_PORT_TO_NET_DEVICE macro below.57 */58struct vnet_port {59 struct vio_driver_state vio;60 61 struct vnet_port_stats stats;62 63 struct hlist_node hash;64 u8 raddr[ETH_ALEN];65 unsigned switch_port:1;66 unsigned tso:1;67 unsigned vsw:1;68 unsigned __pad:13;69 70 struct vnet *vp;71 struct net_device *dev;72 73 struct vnet_tx_entry tx_bufs[VNET_TX_RING_SIZE];74 75 struct list_head list;76 77 u32 stop_rx_idx;78 bool stop_rx;79 bool start_cons;80 81 struct timer_list clean_timer;82 83 u64 rmtu;84 u16 tsolen;85 86 struct napi_struct napi;87 u32 napi_stop_idx;88 bool napi_resume;89 int rx_event;90 u16 q_index;91};92 93static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)94{95 return container_of(vio, struct vnet_port, vio);96}97 98#define VNET_PORT_HASH_SIZE 1699#define VNET_PORT_HASH_MASK (VNET_PORT_HASH_SIZE - 1)100 101static inline unsigned int vnet_hashfn(u8 *mac)102{103 unsigned int val = mac[4] ^ mac[5];104 105 return val & (VNET_PORT_HASH_MASK);106}107 108struct vnet_mcast_entry {109 u8 addr[ETH_ALEN];110 u8 sent;111 u8 hit;112 struct vnet_mcast_entry *next;113};114 115struct vnet {116 spinlock_t lock; /* Protects port_list and port_hash. */117 struct net_device *dev;118 u32 msg_enable;119 u8 q_used[VNET_MAX_TXQS];120 struct list_head port_list;121 struct hlist_head port_hash[VNET_PORT_HASH_SIZE];122 struct vnet_mcast_entry *mcast_list;123 struct list_head list;124 u64 local_mac;125 int nports;126};127 128/* Def used by common code to get the net_device from the proper location */129#define VNET_PORT_TO_NET_DEVICE(__port) \130 ((__port)->vsw ? (__port)->dev : (__port)->vp->dev)131 132/* Common funcs */133void sunvnet_clean_timer_expire_common(struct timer_list *t);134int sunvnet_open_common(struct net_device *dev);135int sunvnet_close_common(struct net_device *dev);136void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp);137int sunvnet_set_mac_addr_common(struct net_device *dev, void *p);138void sunvnet_tx_timeout_common(struct net_device *dev, unsigned int txqueue);139netdev_tx_t140sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,141 struct vnet_port *(*vnet_tx_port)142 (struct sk_buff *, struct net_device *));143#ifdef CONFIG_NET_POLL_CONTROLLER144void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp);145#endif146void sunvnet_event_common(void *arg, int event);147int sunvnet_send_attr_common(struct vio_driver_state *vio);148int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg);149void sunvnet_handshake_complete_common(struct vio_driver_state *vio);150int sunvnet_poll_common(struct napi_struct *napi, int budget);151void sunvnet_port_free_tx_bufs_common(struct vnet_port *port);152void vnet_port_reset(struct vnet_port *port);153bool sunvnet_port_is_up_common(struct vnet_port *vnet);154void sunvnet_port_add_txq_common(struct vnet_port *port);155void sunvnet_port_rm_txq_common(struct vnet_port *port);156 157#endif /* _SUNVNETCOMMON_H */158