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 /* length of time (or less) we expect pending descriptors to be marked
  15  * as VIO_DESC_DONE and skbs ready to be freed
  16  */
  17 #define VNET_CLEAN_TIMEOUT              ((HZ/100)+1)
  18
  19 #define VNET_MAXPACKET                  (65535ULL + ETH_HLEN + VLAN_HLEN)
  20 #define VNET_TX_RING_SIZE               512
  21 #define VNET_TX_WAKEUP_THRESH(dr)       ((dr)->pending / 4)
  22
  23 /* VNET packets are sent in buffers with the first 6 bytes skipped
  24  * so that after the ethernet header the IPv4/IPv6 headers are aligned
  25  * properly.
  26  */
  27 #define VNET_PACKET_SKIP                6
  28
  29 #define VNET_MAXCOOKIES                 (VNET_MAXPACKET/PAGE_SIZE + 1)
  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 struct vnet_port {
  39         struct vio_driver_state vio;
  40
  41         struct hlist_node       hash;
  42         u8                      raddr[ETH_ALEN];
  43         u8                      switch_port;
  44         u8                      __pad;
  45
  46         struct vnet             *vp;
  47
  48         struct vnet_tx_entry    tx_bufs[VNET_TX_RING_SIZE];
  49
  50         struct list_head        list;
  51
  52         u32                     stop_rx_idx;
  53         bool                    stop_rx;
  54         bool                    start_cons;
  55
  56         struct timer_list       clean_timer;
  57
  58         u64                     rmtu;
  59 };
  60
  61 static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
  62 {
  63         return container_of(vio, struct vnet_port, vio);
  64 }
  65
  66 #define VNET_PORT_HASH_SIZE     16
  67 #define VNET_PORT_HASH_MASK     (VNET_PORT_HASH_SIZE - 1)
  68
  69 static inline unsigned int vnet_hashfn(u8 *mac)
  70 {
  71         unsigned int val = mac[4] ^ mac[5];
  72
  73         return val & (VNET_PORT_HASH_MASK);
  74 }
  75
  76 struct vnet_mcast_entry {
  77         u8                      addr[ETH_ALEN];
  78         u8                      sent;
  79         u8                      hit;
  80         struct vnet_mcast_entry *next;
  81 };
  82
  83 struct vnet {
  84         /* Protects port_list and port_hash.  */
  85         spinlock_t              lock;
  86
  87         struct net_device       *dev;
  88
  89         u32                     msg_enable;
  90
  91         struct list_head        port_list;
  92
  93         struct hlist_head       port_hash[VNET_PORT_HASH_SIZE];
  94
  95         struct vnet_mcast_entry *mcast_list;
  96
  97         struct list_head        list;
  98         u64                     local_mac;
  99
 100         struct tasklet_struct   vnet_tx_wakeup;
 101 };
 102
 103 #endif /* _SUNVNET_H */