Commit d26a360b authored by Sean Hefty's avatar Sean Hefty Committed by Roland Dreier

IB/cm: Update protocol to support XRC

Update the REQ and REP messages to support XRC connection setup
according to the XRC Annex.  Several existing fields must be set to 0 or
1 when connecting XRC QPs, and a reserved field is changed to an
extended transport type.
Signed-off-by: default avatarSean Hefty <sean.hefty@intel.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent b93f3c18
......@@ -1008,7 +1008,6 @@ static void cm_format_req(struct cm_req_msg *req_msg,
req_msg->service_id = param->service_id;
req_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
cm_req_set_resp_res(req_msg, param->responder_resources);
cm_req_set_init_depth(req_msg, param->initiator_depth);
cm_req_set_remote_resp_timeout(req_msg,
param->remote_cm_response_timeout);
......@@ -1017,12 +1016,16 @@ static void cm_format_req(struct cm_req_msg *req_msg,
cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
cm_req_set_local_resp_timeout(req_msg,
param->local_cm_response_timeout);
cm_req_set_retry_count(req_msg, param->retry_count);
req_msg->pkey = param->primary_path->pkey;
cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
if (param->qp_type != IB_QPT_XRC_INI) {
cm_req_set_resp_res(req_msg, param->responder_resources);
cm_req_set_retry_count(req_msg, param->retry_count);
cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
cm_req_set_srq(req_msg, param->srq);
}
if (pri_path->hop_limit <= 1) {
req_msg->primary_local_lid = pri_path->slid;
......@@ -1080,7 +1083,8 @@ static int cm_validate_req_param(struct ib_cm_req_param *param)
if (!param->primary_path)
return -EINVAL;
if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC)
if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC &&
param->qp_type != IB_QPT_XRC_INI)
return -EINVAL;
if (param->private_data &&
......@@ -1604,15 +1608,20 @@ static void cm_format_rep(struct cm_rep_msg *rep_msg,
cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
rep_msg->resp_resources = param->responder_resources;
rep_msg->initiator_depth = param->initiator_depth;
cm_rep_set_target_ack_delay(rep_msg,
cm_id_priv->av.port->cm_dev->ack_delay);
cm_rep_set_failover(rep_msg, param->failover_accepted);
cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
cm_rep_set_srq(rep_msg, param->srq);
rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) {
rep_msg->initiator_depth = param->initiator_depth;
cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
cm_rep_set_srq(rep_msg, param->srq);
} else {
cm_rep_set_srq(rep_msg, 1);
}
if (param->private_data && param->private_data_len)
memcpy(rep_msg->private_data, param->private_data,
param->private_data_len);
......@@ -3492,7 +3501,8 @@ static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
qp_attr->path_mtu = cm_id_priv->path_mtu;
qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
if (cm_id_priv->qp_type == IB_QPT_RC) {
if (cm_id_priv->qp_type == IB_QPT_RC ||
cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
*qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
IB_QP_MIN_RNR_TIMER;
qp_attr->max_dest_rd_atomic =
......@@ -3537,15 +3547,21 @@ static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
*qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
if (cm_id_priv->qp_type == IB_QPT_RC) {
*qp_attr_mask |= IB_QP_TIMEOUT | IB_QP_RETRY_CNT |
IB_QP_RNR_RETRY |
switch (cm_id_priv->qp_type) {
case IB_QPT_RC:
case IB_QPT_XRC_INI:
*qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY |
IB_QP_MAX_QP_RD_ATOMIC;
qp_attr->timeout = cm_id_priv->av.timeout;
qp_attr->retry_cnt = cm_id_priv->retry_count;
qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
qp_attr->max_rd_atomic =
cm_id_priv->initiator_depth;
qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
/* fall through */
case IB_QPT_XRC_TGT:
*qp_attr_mask |= IB_QP_TIMEOUT;
qp_attr->timeout = cm_id_priv->av.timeout;
break;
default:
break;
}
if (cm_id_priv->alt_av.ah_attr.dlid) {
*qp_attr_mask |= IB_QP_PATH_MIG_STATE;
......
......@@ -86,7 +86,7 @@ struct cm_req_msg {
__be16 pkey;
/* path MTU:4, RDC exists:1, RNR retry count:3. */
u8 offset50;
/* max CM Retries:4, SRQ:1, rsvd:3 */
/* max CM Retries:4, SRQ:1, extended transport type:3 */
u8 offset51;
__be16 primary_local_lid;
......@@ -175,6 +175,11 @@ static inline enum ib_qp_type cm_req_get_qp_type(struct cm_req_msg *req_msg)
switch(transport_type) {
case 0: return IB_QPT_RC;
case 1: return IB_QPT_UC;
case 3:
switch (req_msg->offset51 & 0x7) {
case 1: return IB_QPT_XRC_TGT;
default: return 0;
}
default: return 0;
}
}
......@@ -188,6 +193,12 @@ static inline void cm_req_set_qp_type(struct cm_req_msg *req_msg,
req_msg->offset40) &
0xFFFFFFF9) | 0x2);
break;
case IB_QPT_XRC_INI:
req_msg->offset40 = cpu_to_be32((be32_to_cpu(
req_msg->offset40) &
0xFFFFFFF9) | 0x6);
req_msg->offset51 = (req_msg->offset51 & 0xF8) | 1;
break;
default:
req_msg->offset40 = cpu_to_be32(be32_to_cpu(
req_msg->offset40) &
......
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