1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _SUNVNETCOMMON_H 3 #define _SUNVNETCOMMON_H 4 5 #include <linux/interrupt.h> 6 7 /* length of time (or less) we expect pending descriptors to be marked 8 * as VIO_DESC_DONE and skbs ready to be freed 9 */ 10 #define VNET_CLEAN_TIMEOUT ((HZ / 100) + 1) 11 12 #define VNET_MAXPACKET (65535ULL + ETH_HLEN + VLAN_HLEN) 13 #define VNET_TX_RING_SIZE 512 14 #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 65535 20 21 /* VNET packets are sent in buffers with the first 6 bytes skipped 22 * so that after the ethernet header the IPv4/IPv6 headers are aligned 23 * properly. 24 */ 25 #define VNET_PACKET_SKIP 6 26 27 #define VNET_MAXCOOKIES (VNET_MAXPACKET / PAGE_SIZE + 1) 28 29 #define VNET_MAX_TXQS 16 30 31 struct vnet_tx_entry { 32 struct sk_buff *skb; 33 unsigned int ncookies; 34 struct ldc_trans_cookie cookies[VNET_MAXCOOKIES]; 35 }; 36 37 struct vnet; 38 39 struct 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 vswitch 54 * port, and the net_device can be found from ->dev. If the 55 * vsw bit is not set, the net_device is available from ->vp->dev. 56 * See the VNET_PORT_TO_NET_DEVICE macro below. 57 */ 58 struct 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 93 static 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 16 99 #define VNET_PORT_HASH_MASK (VNET_PORT_HASH_SIZE - 1) 100 101 static 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 } 107 108 struct vnet_mcast_entry { 109 u8 addr[ETH_ALEN]; 110 u8 sent; 111 u8 hit; 112 struct vnet_mcast_entry *next; 113 }; 114 115 struct 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 */ 133 void sunvnet_clean_timer_expire_common(struct timer_list *t); 134 int sunvnet_open_common(struct net_device *dev); 135 int sunvnet_close_common(struct net_device *dev); 136 void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp); 137 int sunvnet_set_mac_addr_common(struct net_device *dev, void *p); 138 void sunvnet_tx_timeout_common(struct net_device *dev, unsigned int txqueue); 139 netdev_tx_t 140 sunvnet_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_CONTROLLER 144 void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp); 145 #endif 146 void sunvnet_event_common(void *arg, int event); 147 int sunvnet_send_attr_common(struct vio_driver_state *vio); 148 int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg); 149 void sunvnet_handshake_complete_common(struct vio_driver_state *vio); 150 int sunvnet_poll_common(struct napi_struct *napi, int budget); 151 void sunvnet_port_free_tx_bufs_common(struct vnet_port *port); 152 void vnet_port_reset(struct vnet_port *port); 153 bool sunvnet_port_is_up_common(struct vnet_port *vnet); 154 void sunvnet_port_add_txq_common(struct vnet_port *port); 155 void sunvnet_port_rm_txq_common(struct vnet_port *port); 156 157 #endif /* _SUNVNETCOMMON_H */ 158