forked from Minki/linux
d1015645dd
When sending out a burst of packets across multiple descriptors, it is sufficient to send one LDC "start" trigger for the first descriptor, so do not send an LDC "start" for every pass through vnet_start_xmit. Similarly, it is sufficient to send one "DRING_STOPPED" trigger for the last dring (and if that fails, hold off and send the trigger later). Optimizations to the number of LDC messages helps avoid filling up the LDC channel with superfluous LDC messages that risk triggering flow-control on the channel, and also boosts performance. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Raghuram Kothakota <raghuram.kothakota@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
92 lines
1.7 KiB
C
92 lines
1.7 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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#define VNET_TX_RING_SIZE 512
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#define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4)
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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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struct vnet_tx_entry {
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void *buf;
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unsigned int ncookies;
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struct ldc_trans_cookie cookies[2];
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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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u8 switch_port;
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u8 __pad;
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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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};
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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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struct tasklet_struct vnet_tx_wakeup;
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};
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#endif /* _SUNVNET_H */
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