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IB/mthca: Add support for automatic path migration (APM) 

Add code to modify QP operation to handle setting alternate paths for
connected QPs.

Signed-off-by: Dotan Barak <dotanb@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Dotan Barak 2006-01-06 13:23:58 -08:00 committed by Roland Dreier
parent 0f8e8f9607
commit 4de144bf72
1 changed files with 37 additions and 20 deletions
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57
drivers/infiniband/hw/mthca/mthca_qp.c
View File

@ -549,6 +549,25 @@ static __be32 get_hw_access_flags(struct mthca_qp *qp, struct ib_qp_attr *attr,
return cpu_to_be32(hw_access_flags);
}
static void mthca_path_set(struct ib_ah_attr *ah, struct mthca_qp_path *path)
{
path->g_mylmc = ah->src_path_bits & 0x7f;
path->rlid = cpu_to_be16(ah->dlid);
path->static_rate = !!ah->static_rate;
if (ah->ah_flags & IB_AH_GRH) {
path->g_mylmc |= 1 << 7;
path->mgid_index = ah->grh.sgid_index;
path->hop_limit = ah->grh.hop_limit;
path->sl_tclass_flowlabel =
cpu_to_be32((ah->sl << 28) |
(ah->grh.traffic_class << 20) |
(ah->grh.flow_label));
memcpy(path->rgid, ah->grh.dgid.raw, 16);
} else
path->sl_tclass_flowlabel = cpu_to_be32(ah->sl << 28);
}
int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
{
struct mthca_dev *dev = to_mdev(ibqp->device);
@ -712,28 +731,14 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
}
if (attr_mask & IB_QP_RNR_RETRY) {
qp_context->pri_path.rnr_retry = attr->rnr_retry << 5;
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_RETRY);
qp_context->alt_path.rnr_retry = qp_context->pri_path.rnr_retry =
attr->rnr_retry << 5;
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_RETRY |
MTHCA_QP_OPTPAR_ALT_RNR_RETRY);
}
if (attr_mask & IB_QP_AV) {
qp_context->pri_path.g_mylmc = attr->ah_attr.src_path_bits & 0x7f;
qp_context->pri_path.rlid = cpu_to_be16(attr->ah_attr.dlid);
qp_context->pri_path.static_rate = !!attr->ah_attr.static_rate;
if (attr->ah_attr.ah_flags & IB_AH_GRH) {
qp_context->pri_path.g_mylmc |= 1 << 7;
qp_context->pri_path.mgid_index = attr->ah_attr.grh.sgid_index;
qp_context->pri_path.hop_limit = attr->ah_attr.grh.hop_limit;
qp_context->pri_path.sl_tclass_flowlabel =
cpu_to_be32((attr->ah_attr.sl << 28) |
(attr->ah_attr.grh.traffic_class << 20) |
(attr->ah_attr.grh.flow_label));
memcpy(qp_context->pri_path.rgid,
attr->ah_attr.grh.dgid.raw, 16);
} else {
qp_context->pri_path.sl_tclass_flowlabel =
cpu_to_be32(attr->ah_attr.sl << 28);
}
mthca_path_set(&attr->ah_attr, &qp_context->pri_path);
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH);
}
@ -742,7 +747,19 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ACK_TIMEOUT);
}
/* XXX alt_path */
if (attr_mask & IB_QP_ALT_PATH) {
if (attr->alt_port_num == 0 || attr->alt_port_num > dev->limits.num_ports) {
mthca_dbg(dev, "Alternate port number (%u) is invalid\n",
attr->alt_port_num);
return -EINVAL;
}
mthca_path_set(&attr->alt_ah_attr, &qp_context->alt_path);
qp_context->alt_path.port_pkey |= cpu_to_be32(attr->alt_pkey_index |
attr->alt_port_num << 24);
qp_context->alt_path.ackto = attr->alt_timeout << 3;
qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ALT_ADDR_PATH);
}
/* leave rdd as 0 */
qp_context->pd = cpu_to_be32(to_mpd(ibqp->pd)->pd_num);