diff options
Diffstat (limited to 'drivers/infiniband/hw/mlx4/qp.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/qp.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c index 28a08bdd1800..40042184ad58 100644 --- a/drivers/infiniband/hw/mlx4/qp.c +++ b/drivers/infiniband/hw/mlx4/qp.c @@ -1455,3 +1455,140 @@ out: return err; } + +static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state) +{ + switch (mlx4_state) { + case MLX4_QP_STATE_RST: return IB_QPS_RESET; + case MLX4_QP_STATE_INIT: return IB_QPS_INIT; + case MLX4_QP_STATE_RTR: return IB_QPS_RTR; + case MLX4_QP_STATE_RTS: return IB_QPS_RTS; + case MLX4_QP_STATE_SQ_DRAINING: + case MLX4_QP_STATE_SQD: return IB_QPS_SQD; + case MLX4_QP_STATE_SQER: return IB_QPS_SQE; + case MLX4_QP_STATE_ERR: return IB_QPS_ERR; + default: return -1; + } +} + +static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state) +{ + switch (mlx4_mig_state) { + case MLX4_QP_PM_ARMED: return IB_MIG_ARMED; + case MLX4_QP_PM_REARM: return IB_MIG_REARM; + case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED; + default: return -1; + } +} + +static int to_ib_qp_access_flags(int mlx4_flags) +{ + int ib_flags = 0; + + if (mlx4_flags & MLX4_QP_BIT_RRE) + ib_flags |= IB_ACCESS_REMOTE_READ; + if (mlx4_flags & MLX4_QP_BIT_RWE) + ib_flags |= IB_ACCESS_REMOTE_WRITE; + if (mlx4_flags & MLX4_QP_BIT_RAE) + ib_flags |= IB_ACCESS_REMOTE_ATOMIC; + + return ib_flags; +} + +static void to_ib_ah_attr(struct mlx4_dev *dev, struct ib_ah_attr *ib_ah_attr, + struct mlx4_qp_path *path) +{ + memset(ib_ah_attr, 0, sizeof *path); + ib_ah_attr->port_num = path->sched_queue & 0x40 ? 2 : 1; + + if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports) + return; + + ib_ah_attr->dlid = be16_to_cpu(path->rlid); + ib_ah_attr->sl = (path->sched_queue >> 2) & 0xf; + ib_ah_attr->src_path_bits = path->grh_mylmc & 0x7f; + ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0; + ib_ah_attr->ah_flags = (path->grh_mylmc & (1 << 7)) ? IB_AH_GRH : 0; + if (ib_ah_attr->ah_flags) { + ib_ah_attr->grh.sgid_index = path->mgid_index; + ib_ah_attr->grh.hop_limit = path->hop_limit; + ib_ah_attr->grh.traffic_class = + (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff; + ib_ah_attr->grh.flow_label = + be32_to_cpu(path->tclass_flowlabel) & 0xffffff; + memcpy(ib_ah_attr->grh.dgid.raw, + path->rgid, sizeof ib_ah_attr->grh.dgid.raw); + } +} + +int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask, + struct ib_qp_init_attr *qp_init_attr) +{ + struct mlx4_ib_dev *dev = to_mdev(ibqp->device); + struct mlx4_ib_qp *qp = to_mqp(ibqp); + struct mlx4_qp_context context; + int mlx4_state; + int err; + + if (qp->state == IB_QPS_RESET) { + qp_attr->qp_state = IB_QPS_RESET; + goto done; + } + + err = mlx4_qp_query(dev->dev, &qp->mqp, &context); + if (err) + return -EINVAL; + + mlx4_state = be32_to_cpu(context.flags) >> 28; + + qp_attr->qp_state = to_ib_qp_state(mlx4_state); + qp_attr->path_mtu = context.mtu_msgmax >> 5; + qp_attr->path_mig_state = + to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3); + qp_attr->qkey = be32_to_cpu(context.qkey); + qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff; + qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff; + qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff; + qp_attr->qp_access_flags = + to_ib_qp_access_flags(be32_to_cpu(context.params2)); + + if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) { + to_ib_ah_attr(dev->dev, &qp_attr->ah_attr, &context.pri_path); + to_ib_ah_attr(dev->dev, &qp_attr->alt_ah_attr, &context.alt_path); + qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f; + qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num; + } + + qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f; + qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1; + + /* qp_attr->en_sqd_async_notify is only applicable in modify qp */ + qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING; + + qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7); + + qp_attr->max_dest_rd_atomic = + 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7); + qp_attr->min_rnr_timer = + (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f; + qp_attr->timeout = context.pri_path.ackto >> 3; + qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7; + qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7; + qp_attr->alt_timeout = context.alt_path.ackto >> 3; + +done: + qp_attr->cur_qp_state = qp_attr->qp_state; + if (!ibqp->uobject) { + qp_attr->cap.max_send_wr = qp->sq.wqe_cnt; + qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt; + qp_attr->cap.max_send_sge = qp->sq.max_gs; + qp_attr->cap.max_recv_sge = qp->rq.max_gs; + qp_attr->cap.max_inline_data = (1 << qp->sq.wqe_shift) - + send_wqe_overhead(qp->ibqp.qp_type) - + sizeof (struct mlx4_wqe_inline_seg); + qp_init_attr->cap = qp_attr->cap; + } + + return 0; +} + |