[PATCH V2 mlx5-next 09/10] RDMA/mlx5: Refactor affinity related code

Maor Gottlieb
2020-04-20T07:54:56Z

Move affinity related code in modify qp to function.
It's a preparation for next patch the extend the affinity
calculation to consider the xmit slave.

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
---
drivers/infiniband/hw/mlx5/qp.c | 90 +++++++++++++++++++--------------
1 file changed, 53 insertions(+), 37 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 1456db4b6295..a45499809903 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -3416,33 +3416,61 @@ static int modify_raw_packet_qp(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
return 0;
}

-static unsigned int get_tx_affinity(struct mlx5_ib_dev *dev,
- struct mlx5_ib_pd *pd,
- struct mlx5_ib_qp_base *qp_base,
- u8 port_num, struct ib_udata *udata)
+static unsigned int get_tx_affinity_rr(struct mlx5_ib_dev *dev,
+ struct ib_udata *udata)
{
struct mlx5_ib_ucontext *ucontext = rdma_udata_to_drv_context(
udata, struct mlx5_ib_ucontext, ibucontext);
- unsigned int tx_port_affinity;
+ u8 port_num = mlx5_core_native_port_num(dev->mdev) - 1;
+ atomic_t *tx_port_affinity;

- if (ucontext) {
- tx_port_affinity = (unsigned int)atomic_add_return(
- 1, &ucontext->tx_port_affinity) %
- MLX5_MAX_PORTS +
- 1;
+ if (ucontext)
+ tx_port_affinity = &ucontext->tx_port_affinity;
+ else
+ tx_port_affinity = &dev->port[port_num].roce.tx_port_affinity;
+
+ return (unsigned int)atomic_add_return(1, tx_port_affinity) %
+ MLX5_MAX_PORTS + 1;
+}
+
+static bool qp_supports_affinity(struct ib_qp *qp)
+{
+ struct mlx5_ib_qp *mqp = to_mqp(qp);
+
+ if ((qp->qp_type == IB_QPT_RC) ||
+ (qp->qp_type == IB_QPT_UD &&
+ !(mqp->flags & MLX5_IB_QP_SQPN_QP1)) ||
+ (qp->qp_type == IB_QPT_UC) ||
+ (qp->qp_type == IB_QPT_RAW_PACKET) ||
+ (qp->qp_type == IB_QPT_XRC_INI) ||
+ (qp->qp_type == IB_QPT_XRC_TGT))
+ return true;
+ return false;
+}
+
+static unsigned int get_tx_affinity(struct ib_qp *qp, u8 init,
+ struct ib_udata *udata)
+{
+ struct mlx5_ib_ucontext *ucontext = rdma_udata_to_drv_context(
+ udata, struct mlx5_ib_ucontext, ibucontext);
+ struct mlx5_ib_dev *dev = to_mdev(qp->device);
+ struct mlx5_ib_qp *mqp = to_mqp(qp);
+ struct mlx5_ib_qp_base *qp_base;
+ unsigned int tx_affinity;
+
+ if (!(dev->lag_active && init && qp_supports_affinity(qp)))
+ return 0;
+
+ tx_affinity = get_tx_affinity_rr(dev, udata);
+
+ qp_base = &mqp->trans_qp.base;
+ if (ucontext)
mlx5_ib_dbg(dev, "Set tx affinity 0x%x to qpn 0x%x ucontext %p\n",
- tx_port_affinity, qp_base->mqp.qpn, ucontext);
- } else {
- tx_port_affinity =
- (unsigned int)atomic_add_return(
- 1, &dev->port[port_num].roce.tx_port_affinity) %
- MLX5_MAX_PORTS +
- 1;
+ tx_affinity, qp_base->mqp.qpn, ucontext);
+ else
mlx5_ib_dbg(dev, "Set tx affinity 0x%x to qpn 0x%x\n",
- tx_port_affinity, qp_base->mqp.qpn);
- }
-
- return tx_port_affinity;
+ tx_affinity, qp_base->mqp.qpn);
+ return tx_affinity;
}

static int __mlx5_ib_qp_set_counter(struct ib_qp *qp,
@@ -3554,22 +3582,10 @@ static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
}
}

- if ((cur_state == IB_QPS_RESET) && (new_state == IB_QPS_INIT)) {
- if ((ibqp->qp_type == IB_QPT_RC) ||
- (ibqp->qp_type == IB_QPT_UD &&
- !(qp->flags & MLX5_IB_QP_SQPN_QP1)) ||
- (ibqp->qp_type == IB_QPT_UC) ||
- (ibqp->qp_type == IB_QPT_RAW_PACKET) ||
- (ibqp->qp_type == IB_QPT_XRC_INI) ||
- (ibqp->qp_type == IB_QPT_XRC_TGT)) {
- if (dev->lag_active) {
- u8 p = mlx5_core_native_port_num(dev->mdev) - 1;
- tx_affinity = get_tx_affinity(dev, pd, base, p,
- udata);
- context->flags |= cpu_to_be32(tx_affinity << 24);
- }
- }
- }
+ tx_affinity = get_tx_affinity(ibqp,
+ cur_state == IB_QPS_RESET &&
+ new_state == IB_QPS_INIT, udata);
+ context->flags |= cpu_to_be32(tx_affinity << 24);

if (is_sqp(ibqp->qp_type)) {
context->mtu_msgmax = (IB_MTU_256 << 5) | 8;
--
2.17.2