368e36ed4c
This patch adds TSO support for the sunvnet driver. Signed-off-by: David L Stevens <david.stevens@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
114 lines
2.3 KiB
C
114 lines
2.3 KiB
C
#ifndef _SUNVNET_H
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#define _SUNVNET_H
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#include <linux/interrupt.h>
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#define DESC_NCOOKIES(entry_size) \
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((entry_size) - sizeof(struct vio_net_desc))
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/* length of time before we decide the hardware is borked,
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* and dev->tx_timeout() should be called to fix the problem
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*/
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#define VNET_TX_TIMEOUT (5 * HZ)
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/* length of time (or less) we expect pending descriptors to be marked
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* as VIO_DESC_DONE and skbs ready to be freed
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*/
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#define VNET_CLEAN_TIMEOUT ((HZ/100)+1)
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#define VNET_MAXPACKET (65535ULL + ETH_HLEN + VLAN_HLEN)
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#define VNET_TX_RING_SIZE 512
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#define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4)
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#define VNET_MINTSO 2048 /* VIO protocol's minimum TSO len */
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#define VNET_MAXTSO 65535 /* VIO protocol's maximum TSO len */
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/* VNET packets are sent in buffers with the first 6 bytes skipped
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* so that after the ethernet header the IPv4/IPv6 headers are aligned
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* properly.
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*/
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#define VNET_PACKET_SKIP 6
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#define VNET_MAXCOOKIES (VNET_MAXPACKET/PAGE_SIZE + 1)
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struct vnet_tx_entry {
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struct sk_buff *skb;
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unsigned int ncookies;
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struct ldc_trans_cookie cookies[VNET_MAXCOOKIES];
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};
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struct vnet;
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struct vnet_port {
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struct vio_driver_state vio;
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struct hlist_node hash;
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u8 raddr[ETH_ALEN];
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unsigned switch_port:1;
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unsigned tso:1;
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unsigned __pad:14;
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struct vnet *vp;
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struct vnet_tx_entry tx_bufs[VNET_TX_RING_SIZE];
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struct list_head list;
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u32 stop_rx_idx;
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bool stop_rx;
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bool start_cons;
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struct timer_list clean_timer;
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u64 rmtu;
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u16 tsolen;
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struct napi_struct napi;
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u32 napi_stop_idx;
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bool napi_resume;
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int rx_event;
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u16 q_index;
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};
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static inline struct vnet_port *to_vnet_port(struct vio_driver_state *vio)
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{
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return container_of(vio, struct vnet_port, vio);
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}
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#define VNET_PORT_HASH_SIZE 16
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#define VNET_PORT_HASH_MASK (VNET_PORT_HASH_SIZE - 1)
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static inline unsigned int vnet_hashfn(u8 *mac)
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{
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unsigned int val = mac[4] ^ mac[5];
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return val & (VNET_PORT_HASH_MASK);
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}
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struct vnet_mcast_entry {
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u8 addr[ETH_ALEN];
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u8 sent;
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u8 hit;
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struct vnet_mcast_entry *next;
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};
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struct vnet {
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/* Protects port_list and port_hash. */
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spinlock_t lock;
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struct net_device *dev;
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u32 msg_enable;
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struct list_head port_list;
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struct hlist_head port_hash[VNET_PORT_HASH_SIZE];
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struct vnet_mcast_entry *mcast_list;
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struct list_head list;
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u64 local_mac;
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int nports;
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};
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#endif /* _SUNVNET_H */
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