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Commit 82f82ceb authored by Parav Pandit's avatar Parav Pandit Committed by Jason Gunthorpe
Browse files

IB/rxe: Use rdma GID API 



rxe_netdev_from_av can now be done by the core code directly from the
gid_attrs, no need for a helper in the driver.

ib_find_cached_gid_by_port can be switched to use the rdma version here as
well.

Signed-off-by: default avatarParav Pandit <parav@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 1dfce294

drivers/infiniband/sw/rxe/rxe_net.c

+16 −34
Original line number Diff line number Diff line
@@ -182,39 +182,19 @@ static struct dst_entry *rxe_find_route6(struct net_device *ndev, 


#endif



/*

 * Derive the net_device from the av.

 * For physical devices, this will just return rxe->ndev.

 * But for VLAN devices, it will return the vlan dev.

 * Caller should dev_put() the returned net_device.

 */

static struct net_device *rxe_netdev_from_av(struct rxe_dev *rxe,

					     int port_num,

					     struct rxe_av *av)

{

	union ib_gid gid;

	struct ib_gid_attr attr;

	struct net_device *ndev = rxe->ndev;



	if (ib_get_cached_gid(&rxe->ib_dev, port_num, av->grh.sgid_index,

			      &gid, &attr) == 0 &&

	    attr.ndev && attr.ndev != ndev)

		ndev = attr.ndev;

	else

		/* Only to ensure that caller may call dev_put() */

		dev_hold(ndev);



	return ndev;

}



static struct dst_entry *rxe_find_route(struct rxe_dev *rxe,

					struct rxe_qp *qp,

					struct rxe_av *av)

{

	const struct ib_gid_attr *attr;

	struct dst_entry *dst = NULL;

	struct net_device *ndev;



	ndev = rxe_netdev_from_av(rxe, qp->attr.port_num, av);

	attr = rdma_get_gid_attr(&rxe->ib_dev, qp->attr.port_num,

				 av->grh.sgid_index);

	if (IS_ERR(attr))

		return NULL;

	ndev = attr->ndev;



	if (qp_type(qp) == IB_QPT_RC)

		dst = sk_dst_get(qp->sk->sk);
@@ -244,8 +224,7 @@ static struct dst_entry *rxe_find_route(struct rxe_dev *rxe, 
#endif

		}

	}



	dev_put(ndev);

	rdma_put_gid_attr(attr);

	return dst;

}
@@ -536,9 +515,13 @@ struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av, 
	unsigned int hdr_len;

	struct sk_buff *skb;

	struct net_device *ndev;

	const struct ib_gid_attr *attr;

	const int port_num = 1;



	ndev = rxe_netdev_from_av(rxe, port_num, av);

	attr = rdma_get_gid_attr(&rxe->ib_dev, port_num, av->grh.sgid_index);

	if (IS_ERR(attr))

		return NULL;

	ndev = attr->ndev;



	if (av->network_type == RDMA_NETWORK_IPV4)

		hdr_len = ETH_HLEN + sizeof(struct udphdr) +
@@ -550,10 +533,8 @@ struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av, 
	skb = alloc_skb(paylen + hdr_len + LL_RESERVED_SPACE(ndev),

			GFP_ATOMIC);



	if (unlikely(!skb)) {

		dev_put(ndev);

		return NULL;

	}

	if (unlikely(!skb))

		goto out;



	skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(rxe->ndev));
@@ -568,7 +549,8 @@ struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av, 
	pkt->hdr	= skb_put_zero(skb, paylen);

	pkt->mask	|= RXE_GRH_MASK;



	dev_put(ndev);

out:

	rdma_put_gid_attr(attr);

	return skb;

}

drivers/infiniband/sw/rxe/rxe_recv.c

+9 −3
Original line number Diff line number Diff line
@@ -328,6 +328,7 @@ static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb) 


static int rxe_match_dgid(struct rxe_dev *rxe, struct sk_buff *skb)

{

	const struct ib_gid_attr *gid_attr;

	union ib_gid dgid;

	union ib_gid *pdgid;
@@ -339,9 +340,14 @@ static int rxe_match_dgid(struct rxe_dev *rxe, struct sk_buff *skb) 
		pdgid = (union ib_gid *)&ipv6_hdr(skb)->daddr;

	}



	return ib_find_cached_gid_by_port(&rxe->ib_dev, pdgid,

	gid_attr = rdma_find_gid_by_port(&rxe->ib_dev, pdgid,

					 IB_GID_TYPE_ROCE_UDP_ENCAP,

					  1, skb->dev, NULL);

					 1, skb->dev);

	if (IS_ERR(gid_attr))

		return PTR_ERR(gid_attr);



	rdma_put_gid_attr(gid_attr);

	return 0;

}



/* rxe_rcv is called from the interface driver */