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[infiniband] Poll completion queues automatically

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Currently, all Infiniband users must create a process for polling
their completion queues (or rely on a regular hook such as
netdev_poll() in ipoib.c).

Move instead to a model whereby the Infiniband core maintains a single
process calling ib_poll_eq(), and polling the event queue triggers
polls of the applicable completion queues.  (At present, the
Infiniband core simply polls all of the device's completion queues.)
Polling a completion queue will now implicitly refill all attached
receive work queues; this is analogous to the way that netdev_poll()
implicitly refills the RX ring.

Infiniband users no longer need to create a process just to poll their
completion queues and refill their receive rings.
This commit is contained in:
Michael Brown
2009-07-06 19:12:12 +01:00
parent 1f5c0239b4
commit 887d296b88
7 changed files with 124 additions and 113 deletions
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9
src/drivers/net/ipoib.c
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@@ -743,10 +743,7 @@ static void ipoib_poll ( struct net_device *netdev ) {
struct ipoib_device *ipoib = netdev->priv;
struct ib_device *ibdev = ipoib->ibdev;
ib_poll_cq ( ibdev, ipoib->meta.cq );
ib_poll_cq ( ibdev, ipoib->data.cq );
ib_qset_refill_recv ( ibdev, &ipoib->meta );
ib_qset_refill_recv ( ibdev, &ipoib->data );
ib_poll_eq ( ibdev );
}
/**
@@ -861,8 +858,8 @@ static int ipoib_open ( struct net_device *netdev ) {
mac->qpn = htonl ( ipoib->data.qp->qpn );
/* Fill receive rings */
ib_qset_refill_recv ( ibdev, &ipoib->meta );
ib_qset_refill_recv ( ibdev, &ipoib->data );
ib_refill_recv ( ibdev, ipoib->meta.qp );
ib_refill_recv ( ibdev, ipoib->data.qp );
/* Join broadcast group */
if ( ( rc = ipoib_join_broadcast_group ( ipoib ) ) != 0 ) {