drivers/net/sunvnet.h

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