diff options
| author | Wei Liu <wei.liu2@citrix.com> | 2015-04-03 09:44:59 +0300 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-04-15 12:56:47 +0300 |
| commit | ccc9d90a9a8b5c4ad7e9708ec41f75ff9e98d61d (patch) | |
| tree | 2a147c10a289a3f4283d6008708297f07df052a6 /drivers/net | |
| parent | 278edfc07875779a69277f6c5773ec9318a994ee (diff) | |
| download | linux-ccc9d90a9a8b5c4ad7e9708ec41f75ff9e98d61d.tar.xz | |
xenbus_client: Extend interface to support multi-page ring
Originally Xen PV drivers only use single-page ring to pass along
information. This might limit the throughput between frontend and
backend.
The patch extends Xenbus driver to support multi-page ring, which in
general should improve throughput if ring is the bottleneck. Changes to
various frontend / backend to adapt to the new interface are also
included.
Affected Xen drivers:
* blkfront/back
* netfront/back
* pcifront/back
* scsifront/back
* vtpmfront
The interface is documented, as before, in xenbus_client.c.
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Cc: Konrad Wilk <konrad.wilk@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/xen-netback/netback.c | 4 | ||||
| -rw-r--r-- | drivers/net/xen-netfront.c | 9 |
2 files changed, 7 insertions, 6 deletions
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index cab9f5257f57..99a49479843d 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -1781,7 +1781,7 @@ int xenvif_map_frontend_rings(struct xenvif_queue *queue, int err = -ENOMEM; err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(queue->vif), - tx_ring_ref, &addr); + &tx_ring_ref, 1, &addr); if (err) goto err; @@ -1789,7 +1789,7 @@ int xenvif_map_frontend_rings(struct xenvif_queue *queue, BACK_RING_INIT(&queue->tx, txs, PAGE_SIZE); err = xenbus_map_ring_valloc(xenvif_to_xenbus_device(queue->vif), - rx_ring_ref, &addr); + &rx_ring_ref, 1, &addr); if (err) goto err; diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index e9b960f0ff32..13f5e7ff4bb5 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -1486,6 +1486,7 @@ static int setup_netfront(struct xenbus_device *dev, { struct xen_netif_tx_sring *txs; struct xen_netif_rx_sring *rxs; + grant_ref_t gref; int err; queue->tx_ring_ref = GRANT_INVALID_REF; @@ -1502,10 +1503,10 @@ static int setup_netfront(struct xenbus_device *dev, SHARED_RING_INIT(txs); FRONT_RING_INIT(&queue->tx, txs, PAGE_SIZE); - err = xenbus_grant_ring(dev, virt_to_mfn(txs)); + err = xenbus_grant_ring(dev, txs, 1, &gref); if (err < 0) goto grant_tx_ring_fail; - queue->tx_ring_ref = err; + queue->tx_ring_ref = gref; rxs = (struct xen_netif_rx_sring *)get_zeroed_page(GFP_NOIO | __GFP_HIGH); if (!rxs) { @@ -1516,10 +1517,10 @@ static int setup_netfront(struct xenbus_device *dev, SHARED_RING_INIT(rxs); FRONT_RING_INIT(&queue->rx, rxs, PAGE_SIZE); - err = xenbus_grant_ring(dev, virt_to_mfn(rxs)); + err = xenbus_grant_ring(dev, rxs, 1, &gref); if (err < 0) goto grant_rx_ring_fail; - queue->rx_ring_ref = err; + queue->rx_ring_ref = gref; if (feature_split_evtchn) err = setup_netfront_split(queue); |