diff options
author | David Vrabel <david.vrabel@citrix.com> | 2011-09-29 16:53:31 +0100 |
---|---|---|
committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-10-26 10:02:56 -0400 |
commit | c9d6369978411f690513994e6e53e2e6410874a4 (patch) | |
tree | a75b386938b3f8f993c774c06f0e7b2ae830c1de /drivers | |
parent | 2d073846b891c3f49c4ea03c5db3ac92f92742f1 (diff) | |
download | op-kernel-dev-c9d6369978411f690513994e6e53e2e6410874a4.zip op-kernel-dev-c9d6369978411f690513994e6e53e2e6410874a4.tar.gz |
net: xen-netback: use API provided by xenbus module to map rings
The xenbus module provides xenbus_map_ring_valloc() and
xenbus_map_ring_vfree(). Use these to map the Tx and Rx ring pages
granted by the frontend.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/xen-netback/common.h | 11 | ||||
-rw-r--r-- | drivers/net/xen-netback/netback.c | 80 |
2 files changed, 22 insertions, 69 deletions
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h index 161f207..94b79c3 100644 --- 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) diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index fd00f25..3af2924 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -1577,88 +1577,42 @@ static int xen_netbk_kthread(void *data) void xen_netbk_unmap_frontend_rings(struct xenvif *vif) { - struct gnttab_unmap_grant_ref op; - - if (vif->tx.sring) { - gnttab_set_unmap_op(&op, (unsigned long)vif->tx_comms_area->addr, - GNTMAP_host_map, vif->tx_shmem_handle); - - if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1)) - BUG(); - } - - if (vif->rx.sring) { - gnttab_set_unmap_op(&op, (unsigned long)vif->rx_comms_area->addr, - GNTMAP_host_map, vif->rx_shmem_handle); - - if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1)) - BUG(); - } - if (vif->rx_comms_area) - free_vm_area(vif->rx_comms_area); - if (vif->tx_comms_area) - free_vm_area(vif->tx_comms_area); + if (vif->tx.sring) + xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(vif), + vif->tx.sring); + if (vif->rx.sring) + xenbus_unmap_ring_vfree(xenvif_to_xenbus_device(vif), + vif->rx.sring); } int xen_netbk_map_frontend_rings(struct xenvif *vif, grant_ref_t tx_ring_ref, grant_ref_t rx_ring_ref) { - struct gnttab_map_grant_ref op; + void *addr; struct xen_netif_tx_sring *txs; struct xen_netif_rx_sring *rxs; int err = -ENOMEM; - vif->tx_comms_area = alloc_vm_area(PAGE_SIZE); - if (vif->tx_comms_area == NULL) + err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(vif), + tx_ring_ref, &addr); + if (err) goto err; - vif->rx_comms_area = alloc_vm_area(PAGE_SIZE); - if (vif->rx_comms_area == NULL) - goto err; - - gnttab_set_map_op(&op, (unsigned long)vif->tx_comms_area->addr, - GNTMAP_host_map, tx_ring_ref, vif->domid); - - if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1)) - BUG(); - - if (op.status) { - netdev_warn(vif->dev, - "failed to map tx ring. err=%d status=%d\n", - err, op.status); - err = op.status; - goto err; - } - - vif->tx_shmem_ref = tx_ring_ref; - vif->tx_shmem_handle = op.handle; - - txs = (struct xen_netif_tx_sring *)vif->tx_comms_area->addr; + txs = (struct xen_netif_tx_sring *)addr; BACK_RING_INIT(&vif->tx, txs, PAGE_SIZE); - gnttab_set_map_op(&op, (unsigned long)vif->rx_comms_area->addr, - GNTMAP_host_map, rx_ring_ref, vif->domid); - - if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1)) - BUG(); - - if (op.status) { - netdev_warn(vif->dev, - "failed to map rx ring. err=%d status=%d\n", - err, op.status); - err = op.status; + err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(vif), + rx_ring_ref, &addr); + if (err) goto err; - } - - vif->rx_shmem_ref = rx_ring_ref; - vif->rx_shmem_handle = op.handle; - vif->rx_req_cons_peek = 0; - rxs = (struct xen_netif_rx_sring *)vif->rx_comms_area->addr; + rxs = (struct xen_netif_rx_sring *)addr; BACK_RING_INIT(&vif->rx, rxs, PAGE_SIZE); + vif->rx_req_cons_peek = 0; + return 0; err: |