diff options
| author |   Eli Cohen <eli@mellanox.co.il> | 2008-01-30 18:30:53 +0200 |
|---|---|---|
| committer |   Roland Dreier <rolandd@cisco.com> | 2008-02-08 14:32:37 -0800 |
| commit | 7143740d26098aca84ecc7376ccfe2c58fd0412e (patch) | |
| tree | c29029045ebdbe197f94ead3e1d6610f498f1880 /drivers/infiniband/ulp/ipoib/ipoib_verbs.c | |
| parent | IPoIB: Add high DMA feature flag (diff) | |
| download | linux-dev-7143740d26098aca84ecc7376ccfe2c58fd0412e.tar.xz linux-dev-7143740d26098aca84ecc7376ccfe2c58fd0412e.zip | |
IPoIB: Add send gather support
This patch acts as a preparation for using checksum offload for IB
devices capable of inserting/verifying checksum in IP packets. The
patch does not actaully turn on NETIF_F_SG - we defer that to the
patches adding checksum offload capabilities.
We only add support for send gathers for datagram mode, since existing
HW does not support checksum offload on connected QPs.
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_verbs.c')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_verbs.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c index 433e99ac227b..a3aeb911f024 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_verbs.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_verbs.c @@ -157,6 +157,7 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca) }; int ret, size; + int i; priv->pd = ib_alloc_pd(priv->ca); if (IS_ERR(priv->pd)) { @@ -191,6 +192,9 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca) init_attr.send_cq = priv->cq; init_attr.recv_cq = priv->cq; + if (dev->features & NETIF_F_SG) + init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1; + priv->qp = ib_create_qp(priv->pd, &init_attr); if (IS_ERR(priv->qp)) { printk(KERN_WARNING "%s: failed to create QP\n", ca->name); @@ -201,11 +205,11 @@ int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca) priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff; priv->dev->dev_addr[3] = (priv->qp->qp_num ) & 0xff; - priv->tx_sge.lkey = priv->mr->lkey; + for (i = 0; i < MAX_SKB_FRAGS + 1; ++i) + priv->tx_sge[i].lkey = priv->mr->lkey; priv->tx_wr.opcode = IB_WR_SEND; - priv->tx_wr.sg_list = &priv->tx_sge; - priv->tx_wr.num_sge = 1; + priv->tx_wr.sg_list = priv->tx_sge; priv->tx_wr.send_flags = IB_SEND_SIGNALED; return 0; |