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| author | David S. Miller <davem@davemloft.net> | 2013-05-23 18:40:46 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-05-23 18:40:46 -0700 |
| commit | 340611ab7f8c95e9638bb8a181cb078e900dc5ec (patch) | |
| tree | a39dca4181d43db663b5796335fecbed7b0ed34f /drivers/net/xen-netback/common.h | |
| parent | 8892475386e819aa50856947948c546ccc964d96 (diff) | |
| parent | a5560a6c17a4af4e8f45d5c1215ba7d5bb0ff109 (diff) | |
Merge branch 'xen_split_event_channels'
Wei Liu says:
====================
This series adds a new feature called split event channels.
In the original implementation, only one event channel is setup between
frontend and backend. This is not ideal as TX notification interferes with RX
notification. Using dedicated event channels for TX and RX solves this issue.
Changes since V2:
* feature_split_event_channels -> separate_tx_rx_irq
* make separate_tx_rx_irq bool
* document this feature in header file
* don't report fatal if writing feature to xenstore fails
* frontend will fall back to single event channel if new feature setup fails
Changes since V1:
* change subject lines of commits to be more specific
* add parameter feature_split_event_channels for xen-netback
* remove two dev_info
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netback/common.h')
| -rw-r--r-- | drivers/net/xen-netback/common.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h index 6102a6c59f4e..8a4d77ee9c5b 100644 --- a/drivers/net/xen-netback/common.h +++ b/drivers/net/xen-netback/common.h @@ -57,8 +57,12 @@ struct xenvif { u8 fe_dev_addr[6]; - /* Physical parameters of the comms window. */ - unsigned int irq; + /* When feature-split-event-channels = 0, tx_irq = rx_irq. */ + unsigned int tx_irq; + unsigned int rx_irq; + /* Only used when feature-split-event-channels = 1 */ + char tx_irq_name[IFNAMSIZ+4]; /* DEVNAME-tx */ + char rx_irq_name[IFNAMSIZ+4]; /* DEVNAME-rx */ /* List of frontends to notify after a batch of frames sent. */ struct list_head notify_list; @@ -113,7 +117,8 @@ struct xenvif *xenvif_alloc(struct device *parent, unsigned int handle); int xenvif_connect(struct xenvif *vif, unsigned long tx_ring_ref, - unsigned long rx_ring_ref, unsigned int evtchn); + unsigned long rx_ring_ref, unsigned int tx_evtchn, + unsigned int rx_evtchn); void xenvif_disconnect(struct xenvif *vif); void xenvif_get(struct xenvif *vif); @@ -158,4 +163,6 @@ void xenvif_carrier_off(struct xenvif *vif); /* Returns number of ring slots required to send an skb to the frontend */ unsigned int xen_netbk_count_skb_slots(struct xenvif *vif, struct sk_buff *skb); +extern bool separate_tx_rx_irq; + #endif /* __XEN_NETBACK__COMMON_H__ */ |