diff options
Diffstat (limited to 'drivers/net/xen-netback/common.h')
| -rw-r--r-- | drivers/net/xen-netback/common.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h index ae413a2cbee7..9d3584545e5d 100644 --- a/drivers/net/xen-netback/common.h +++ b/drivers/net/xen-netback/common.h @@ -108,6 +108,15 @@ struct xenvif_rx_meta { */ #define MAX_GRANT_COPY_OPS (MAX_SKB_FRAGS * XEN_NETIF_RX_RING_SIZE) +#define NETBACK_INVALID_HANDLE -1 + +/* To avoid confusion, we define XEN_NETBK_LEGACY_SLOTS_MAX indicating + * the maximum slots a valid packet can use. Now this value is defined + * to be XEN_NETIF_NR_SLOTS_MIN, which is supposed to be supported by + * all backend. + */ +#define XEN_NETBK_LEGACY_SLOTS_MAX XEN_NETIF_NR_SLOTS_MIN + struct xenvif { /* Unique identifier for this interface. */ domid_t domid; @@ -216,7 +225,7 @@ void xenvif_carrier_off(struct xenvif *vif); int xenvif_tx_action(struct xenvif *vif, int budget); -int xenvif_kthread(void *data); +int xenvif_kthread_guest_rx(void *data); void xenvif_kick_thread(struct xenvif *vif); /* Determine whether the needed number of slots (req) are available, @@ -226,6 +235,18 @@ bool xenvif_rx_ring_slots_available(struct xenvif *vif, int needed); void xenvif_stop_queue(struct xenvif *vif); +static inline pending_ring_idx_t nr_pending_reqs(struct xenvif *vif) +{ + return MAX_PENDING_REQS - + vif->pending_prod + vif->pending_cons; +} + +static inline bool xenvif_tx_pending_slots_available(struct xenvif *vif) +{ + return nr_pending_reqs(vif) + XEN_NETBK_LEGACY_SLOTS_MAX + < MAX_PENDING_REQS; +} + extern bool separate_tx_rx_irq; #endif /* __XEN_NETBACK__COMMON_H__ */ |