root/drivers/net/ethernet/sun/sunvnet_common.h

INCLUDED FROM

DEFINITIONS

1. to_vnet_port
2. vnet_hashfn

   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);
 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 */