net: xen-netback: use API provided by xenbus module to map rings

[cascardo/linux.git] / drivers / net / xen-netback / common.h

diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index 161f207..94b79c3 100644 (file)
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -58,10 +58,6 @@ struct xenvif {
        u8               fe_dev_addr[6];
 
        /* Physical parameters of the comms window. */
-       grant_handle_t   tx_shmem_handle;
-       grant_ref_t      tx_shmem_ref;
-       grant_handle_t   rx_shmem_handle;
-       grant_ref_t      rx_shmem_ref;
        unsigned int     irq;
 
        /* List of frontends to notify after a batch of frames sent. */
@@ -70,8 +66,6 @@ struct xenvif {
        /* The shared rings and indexes. */
        struct xen_netif_tx_back_ring tx;
        struct xen_netif_rx_back_ring rx;
-       struct vm_struct *tx_comms_area;
-       struct vm_struct *rx_comms_area;
 
        /* Frontend feature information. */
        u8 can_sg:1;
@@ -106,6 +100,11 @@ struct xenvif {
        wait_queue_head_t waiting_to_free;
 };
 
+static inline struct xenbus_device *xenvif_to_xenbus_device(struct xenvif *vif)
+{
+       return to_xenbus_device(vif->dev->dev.parent);
+}
+
 #define XEN_NETIF_TX_RING_SIZE __CONST_RING_SIZE(xen_netif_tx, PAGE_SIZE)
 #define XEN_NETIF_RX_RING_SIZE __CONST_RING_SIZE(xen_netif_rx, PAGE_SIZE)