ethernet/sun/sunvnet_common.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _SUNVNETCOMMON_H
0003 #define _SUNVNETCOMMON_H
0004
0005 #include <linux/interrupt.h>
0006
0007 /* length of time (or less) we expect pending descriptors to be marked
0008  * as VIO_DESC_DONE and skbs ready to be freed
0009  */
0010 #define VNET_CLEAN_TIMEOUT      ((HZ / 100) + 1)
0011
0012 #define VNET_MAXPACKET          (65535ULL + ETH_HLEN + VLAN_HLEN)
0013 #define VNET_TX_RING_SIZE       512
0014 #define VNET_TX_WAKEUP_THRESH(dr)   ((dr)->pending / 4)
0015
0016 #define VNET_MINTSO  2048   /* VIO protocol's minimum TSO len */
0017 #define VNET_MAXTSO 65535   /* VIO protocol's maximum TSO len */
0018
0019 #define VNET_MAX_MTU    65535
0020
0021 /* VNET packets are sent in buffers with the first 6 bytes skipped
0022  * so that after the ethernet header the IPv4/IPv6 headers are aligned
0023  * properly.
0024  */
0025 #define VNET_PACKET_SKIP        6
0026
0027 #define VNET_MAXCOOKIES         (VNET_MAXPACKET / PAGE_SIZE + 1)
0028
0029 #define VNET_MAX_TXQS       16
0030
0031 struct vnet_tx_entry {
0032     struct sk_buff      *skb;
0033     unsigned int        ncookies;
0034     struct ldc_trans_cookie cookies[VNET_MAXCOOKIES];
0035 };
0036
0037 struct vnet;
0038
0039 struct vnet_port_stats {
0040     /* keep them all the same size */
0041     u32 rx_bytes;
0042     u32 tx_bytes;
0043     u32 rx_packets;
0044     u32 tx_packets;
0045     u32 event_up;
0046     u32 event_reset;
0047     u32 q_placeholder;
0048 };
0049
0050 #define NUM_VNET_PORT_STATS  (sizeof(struct vnet_port_stats) / sizeof(u32))
0051
0052 /* Structure to describe a vnet-port or vsw-port in the MD.
0053  * If the vsw bit is set, this structure represents a vswitch
0054  * port, and the net_device can be found from ->dev. If the
0055  * vsw bit is not set, the net_device is available from ->vp->dev.
0056  * See the VNET_PORT_TO_NET_DEVICE macro below.
0057  */
0058 struct vnet_port {
0059     struct vio_driver_state vio;
0060
0061     struct vnet_port_stats stats;
0062
0063     struct hlist_node   hash;
0064     u8          raddr[ETH_ALEN];
0065     unsigned        switch_port:1;
0066     unsigned        tso:1;
0067     unsigned        vsw:1;
0068     unsigned        __pad:13;
0069
0070     struct vnet     *vp;
0071     struct net_device   *dev;
0072
0073     struct vnet_tx_entry    tx_bufs[VNET_TX_RING_SIZE];
0074
0075     struct list_head    list;
0076
0077     u32         stop_rx_idx;
0078     bool            stop_rx;
0079     bool            start_cons;
0080
0081     struct timer_list   clean_timer;
0082
0083     u64         rmtu;
0084     u16         tsolen;
0085
0086     struct napi_struct  napi;
0087     u32         napi_stop_idx;
0088     bool            napi_resume;
0089     int         rx_event;
0090     u16         q_index;
0091 };
0092
0093 static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
0094 {
0095     return container_of(vio, struct vnet_port, vio);
0096 }
0097
0098 #define VNET_PORT_HASH_SIZE 16
0099 #define VNET_PORT_HASH_MASK (VNET_PORT_HASH_SIZE - 1)
0100
0101 static inline unsigned int vnet_hashfn(u8 *mac)
0102 {
0103     unsigned int val = mac[4] ^ mac[5];
0104
0105     return val & (VNET_PORT_HASH_MASK);
0106 }
0107
0108 struct vnet_mcast_entry {
0109     u8          addr[ETH_ALEN];
0110     u8          sent;
0111     u8          hit;
0112     struct vnet_mcast_entry *next;
0113 };
0114
0115 struct vnet {
0116     spinlock_t      lock; /* Protects port_list and port_hash.  */
0117     struct net_device   *dev;
0118     u32         msg_enable;
0119     u8          q_used[VNET_MAX_TXQS];
0120     struct list_head    port_list;
0121     struct hlist_head   port_hash[VNET_PORT_HASH_SIZE];
0122     struct vnet_mcast_entry *mcast_list;
0123     struct list_head    list;
0124     u64         local_mac;
0125     int         nports;
0126 };
0127
0128 /* Def used by common code to get the net_device from the proper location */
0129 #define VNET_PORT_TO_NET_DEVICE(__port) \
0130     ((__port)->vsw ? (__port)->dev : (__port)->vp->dev)
0131
0132 /* Common funcs */
0133 void sunvnet_clean_timer_expire_common(struct timer_list *t);
0134 int sunvnet_open_common(struct net_device *dev);
0135 int sunvnet_close_common(struct net_device *dev);
0136 void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp);
0137 int sunvnet_set_mac_addr_common(struct net_device *dev, void *p);
0138 void sunvnet_tx_timeout_common(struct net_device *dev, unsigned int txqueue);
0139 netdev_tx_t
0140 sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,
0141               struct vnet_port *(*vnet_tx_port)
0142               (struct sk_buff *, struct net_device *));
0143 #ifdef CONFIG_NET_POLL_CONTROLLER
0144 void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp);
0145 #endif
0146 void sunvnet_event_common(void *arg, int event);
0147 int sunvnet_send_attr_common(struct vio_driver_state *vio);
0148 int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg);
0149 void sunvnet_handshake_complete_common(struct vio_driver_state *vio);
0150 int sunvnet_poll_common(struct napi_struct *napi, int budget);
0151 void sunvnet_port_free_tx_bufs_common(struct vnet_port *port);
0152 void vnet_port_reset(struct vnet_port *port);
0153 bool sunvnet_port_is_up_common(struct vnet_port *vnet);
0154 void sunvnet_port_add_txq_common(struct vnet_port *port);
0155 void sunvnet_port_rm_txq_common(struct vnet_port *port);
0156
0157 #endif /* _SUNVNETCOMMON_H */