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RDMA: Convert drivers to use sgid_attr instead of sgid_index

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The core code now ensures that all driver callbacks that receive an
rdma_ah_attrs will have a sgid_attr's pointer if there is a GRH present.

Drivers can use this pointer instead of calling a query function with
sgid_index. This simplifies the drivers and also avoids races where a
gid_index lookup may return different data if it is changed.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
This commit is contained in:
Parav Pandit
2018-06-13 10:22:06 +03:00
committed by Jason Gunthorpe
parent d97099fe53
commit 47ec386662
16 changed files with 97 additions and 238 deletions
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16
drivers/infiniband/hw/mlx4/ah.c
View File

@ -82,12 +82,11 @@ static struct ib_ah *create_iboe_ah(struct ib_pd *pd,
struct mlx4_ib_ah *ah)
{
struct mlx4_ib_dev *ibdev = to_mdev(pd->device);
const struct ib_gid_attr *gid_attr;
struct mlx4_dev *dev = ibdev->dev;
int is_mcast = 0;
struct in6_addr in6;
u16 vlan_tag = 0xffff;
union ib_gid sgid;
struct ib_gid_attr gid_attr;
const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
int ret;
@ -96,15 +95,12 @@ static struct ib_ah *create_iboe_ah(struct ib_pd *pd,
is_mcast = 1;
memcpy(ah->av.eth.mac, ah_attr->roce.dmac, ETH_ALEN);
ret = ib_get_cached_gid(pd->device, rdma_ah_get_port_num(ah_attr),
grh->sgid_index, &sgid, &gid_attr);
if (ret)
return ERR_PTR(ret);
eth_zero_addr(ah->av.eth.s_mac);
if (is_vlan_dev(gid_attr.ndev))
vlan_tag = vlan_dev_vlan_id(gid_attr.ndev);
memcpy(ah->av.eth.s_mac, gid_attr.ndev->dev_addr, ETH_ALEN);
dev_put(gid_attr.ndev);
gid_attr = ah_attr->grh.sgid_attr;
if (is_vlan_dev(gid_attr->ndev))
vlan_tag = vlan_dev_vlan_id(gid_attr->ndev);
memcpy(ah->av.eth.s_mac, gid_attr->ndev->dev_addr, ETH_ALEN);
if (vlan_tag < 0x1000)
vlan_tag |= (rdma_ah_get_sl(ah_attr) & 7) << 13;
ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn |

31
drivers/infiniband/hw/mlx4/qp.c
View File

@ -2176,6 +2176,7 @@ static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type,
{
struct ib_uobject *ibuobject;
struct ib_srq *ibsrq;
const struct ib_gid_attr *gid_attr = NULL;
struct ib_rwq_ind_table *rwq_ind_tbl;
enum ib_qp_type qp_type;
struct mlx4_ib_dev *dev;
@ -2356,29 +2357,17 @@ static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type,
if (attr_mask & IB_QP_AV) {
u8 port_num = mlx4_is_bonded(dev->dev) ? 1 :
attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
union ib_gid gid;
struct ib_gid_attr gid_attr = {.gid_type = IB_GID_TYPE_IB};
u16 vlan = 0xffff;
u8 smac[ETH_ALEN];
int status = 0;
int is_eth =
rdma_cap_eth_ah(&dev->ib_dev, port_num) &&
rdma_ah_get_ah_flags(&attr->ah_attr) & IB_AH_GRH;
if (is_eth) {
int index =
rdma_ah_read_grh(&attr->ah_attr)->sgid_index;
status = ib_get_cached_gid(&dev->ib_dev, port_num,
index, &gid, &gid_attr);
if (!status) {
vlan = rdma_vlan_dev_vlan_id(gid_attr.ndev);
memcpy(smac, gid_attr.ndev->dev_addr, ETH_ALEN);
dev_put(gid_attr.ndev);
}
gid_attr = attr->ah_attr.grh.sgid_attr;
vlan = rdma_vlan_dev_vlan_id(gid_attr->ndev);
memcpy(smac, gid_attr->ndev->dev_addr, ETH_ALEN);
}
if (status)
goto out;
if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path,
port_num, vlan, smac))
@ -2389,7 +2378,7 @@ static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type,
if (is_eth &&
(cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR)) {
u8 qpc_roce_mode = gid_type_to_qpc(gid_attr.gid_type);
u8 qpc_roce_mode = gid_type_to_qpc(gid_attr->gid_type);
if (qpc_roce_mode == MLX4_QPC_ROCE_MODE_UNDEFINED) {
err = -EINVAL;
@ -3181,10 +3170,12 @@ static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_ud_wr *wr,
to_mdev(ib_dev)->sriov.demux[sqp->qp.port - 1].
guid_cache[ah->av.ib.gid_index];
} else {
ib_get_cached_gid(ib_dev,
be32_to_cpu(ah->av.ib.port_pd) >> 24,
ah->av.ib.gid_index,
&sqp->ud_header.grh.source_gid, NULL);
err = rdma_query_gid(ib_dev,
be32_to_cpu(ah->av.ib.port_pd) >> 24,
ah->av.ib.gid_index,
&sqp->ud_header.grh.source_gid);
if (err)
return err;
}
}
memcpy(sqp->ud_header.grh.destination_gid.raw,