diff options
Diffstat (limited to 'xen-2.4.16/include/xeno/vif.h')
| -rw-r--r-- | xen-2.4.16/include/xeno/vif.h | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/xen-2.4.16/include/xeno/vif.h b/xen-2.4.16/include/xeno/vif.h index 46cfbd4bb8..7b56caaabe 100644 --- a/xen-2.4.16/include/xeno/vif.h +++ b/xen-2.4.16/include/xeno/vif.h @@ -42,8 +42,26 @@ typedef struct tx_shadow_entry_st { typedef struct net_shadow_ring_st { rx_shadow_entry_t *rx_ring; tx_shadow_entry_t *tx_ring; - unsigned int rx_prod, rx_cons, rx_idx; - unsigned int tx_prod, tx_cons, tx_idx; + + /* + * Private copy of producer. Follows guest OS version, but never + * catches up with our consumer index. + */ + unsigned int rx_prod; + /* Points at next buffer to be filled by NIC. Chases rx_prod. */ + unsigned int rx_idx; + /* Points at next buffer to be returned to the guest OS. Chases rx_idx. */ + unsigned int rx_cons; + + /* + * Private copy of producer. Follows guest OS version, but never + * catches up with our consumer index. + */ + unsigned int tx_prod; + /* Points at next buffer to be scheduled. Chases tx_prod. */ + unsigned int tx_idx; + /* Points at next buffer to be returned to the guest OS. Chases tx_idx. */ + unsigned int tx_cons; } net_shadow_ring_t; typedef struct net_vif_st { |