drivers/net/ethernet/sun/sunvnet.h

   1 #ifndef _SUNVNET_H
   2 #define _SUNVNET_H
   3
   4 #include <linux/interrupt.h>
   5
   6 #define DESC_NCOOKIES(entry_size)       \
   7         ((entry_size) - sizeof(struct vio_net_desc))
   8
   9 /* length of time before we decide the hardware is borked,
  10  * and dev->tx_timeout() should be called to fix the problem
  11  */
  12 #define VNET_TX_TIMEOUT                 (5 * HZ)
  13
  14 #define VNET_TX_RING_SIZE               512
  15 #define VNET_TX_WAKEUP_THRESH(dr)       ((dr)->pending / 4)
  16
  17 /* VNET packets are sent in buffers with the first 6 bytes skipped
  18  * so that after the ethernet header the IPv4/IPv6 headers are aligned
  19  * properly.
  20  */
  21 #define VNET_PACKET_SKIP                6
  22
  23 struct vnet_tx_entry {
  24         void                    *buf;
  25         unsigned int            ncookies;
  26         struct ldc_trans_cookie cookies[2];
  27 };
  28
  29 struct vnet;
  30 struct vnet_port {
  31         struct vio_driver_state vio;
  32
  33         struct hlist_node       hash;
  34         u8                      raddr[ETH_ALEN];
  35         u8                      switch_port;
  36         u8                      __pad;
  37
  38         struct vnet             *vp;
  39
  40         struct vnet_tx_entry    tx_bufs[VNET_TX_RING_SIZE];
  41
  42         struct list_head        list;
  43 };
  44
  45 static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
  46 {
  47         return container_of(vio, struct vnet_port, vio);
  48 }
  49
  50 #define VNET_PORT_HASH_SIZE     16
  51 #define VNET_PORT_HASH_MASK     (VNET_PORT_HASH_SIZE - 1)
  52
  53 static inline unsigned int vnet_hashfn(u8 *mac)
  54 {
  55         unsigned int val = mac[4] ^ mac[5];
  56
  57         return val & (VNET_PORT_HASH_MASK);
  58 }
  59
  60 struct vnet_mcast_entry {
  61         u8                      addr[ETH_ALEN];
  62         u8                      sent;
  63         u8                      hit;
  64         struct vnet_mcast_entry *next;
  65 };
  66
  67 struct vnet {
  68         /* Protects port_list and port_hash.  */
  69         spinlock_t              lock;
  70
  71         struct net_device       *dev;
  72
  73         u32                     msg_enable;
  74
  75         struct list_head        port_list;
  76
  77         struct hlist_head       port_hash[VNET_PORT_HASH_SIZE];
  78
  79         struct vnet_mcast_entry *mcast_list;
  80
  81         struct list_head        list;
  82         u64                     local_mac;
  83
  84         struct tasklet_struct   vnet_tx_wakeup;
  85 };
  86
  87 #endif /* _SUNVNET_H */