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IB/mlx5: Add driver cross-channel support

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Add support of cross-channel functionality to mlx5
driver. This includes ability to ignore overrun for CQ
which intended for cross-channel, export device capability and
configure the QP to be sync master/slave queues.

The cross-channel enabled QP supports combination of
three possible properties:
* WQE processing on the receive queue of this QP
* WQE processing on the send queue of this QP
* WQE are supported on the send queue

Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Leon Romanovsky
2015-12-20 12:16:11 +02:00
committed by Doug Ledford
parent 8a06ce59a4
commit 051f263098
5 changed files with 72 additions and 11 deletions
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7
drivers/infiniband/hw/mlx5/cq.c
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@@ -778,7 +778,7 @@ struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev,
int eqn;
int err;
if (attr->flags)
if (check_cq_create_flags(attr->flags))
return ERR_PTR(-EINVAL);
if (entries < 0)
@@ -800,6 +800,7 @@ struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev,
spin_lock_init(&cq->lock);
cq->resize_buf = NULL;
cq->resize_umem = NULL;
cq->create_flags = attr->flags;
if (context) {
err = create_cq_user(dev, udata, context, cq, entries,
@@ -817,6 +818,10 @@ struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev,
cq->cqe_size = cqe_size;
cqb->ctx.cqe_sz_flags = cqe_sz_to_mlx_sz(cqe_size) << 5;
if (cq->create_flags & IB_CQ_FLAGS_IGNORE_OVERRUN)
cqb->ctx.cqe_sz_flags |= (1 << 1);
cqb->ctx.log_sz_usr_page = cpu_to_be32((ilog2(entries) << 24) | index);
err = mlx5_vector2eqn(dev->mdev, vector, &eqn, &irqn);
if (err)