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IB/mlx5: Support scatter to CQE for DC transport type

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Scatter to CQE is a HW offload that saves PCI writes by scattering the
payload to the CQE.
This patch extends already existing functionality to support DC
transport type.

Signed-off-by: Yonatan Cohen <yonatanc@mellanox.com>
Reviewed-by: Guy Levi <guyle@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Yonatan Cohen 2018-10-09 12:05:13 +03:00 committed by Doug Ledford
parent 5a8336d99a
commit 5d6ff1babe
3 changed files with 54 additions and 21 deletions
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2
drivers/infiniband/hw/mlx5/cq.c
View File

@ -1460,7 +1460,7 @@ ex:
return err;
}
int mlx5_ib_get_cqe_size(struct mlx5_ib_dev *dev, struct ib_cq *ibcq)
int mlx5_ib_get_cqe_size(struct ib_cq *ibcq)
{
struct mlx5_ib_cq *cq;

2
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@ -1127,7 +1127,7 @@ void __mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
void mlx5_ib_populate_pas(struct mlx5_ib_dev *dev, struct ib_umem *umem,
int page_shift, __be64 *pas, int access_flags);
void mlx5_ib_copy_pas(u64 *old, u64 *new, int step, int num);
int mlx5_ib_get_cqe_size(struct mlx5_ib_dev *dev, struct ib_cq *ibcq);
int mlx5_ib_get_cqe_size(struct ib_cq *ibcq);
int mlx5_mr_cache_init(struct mlx5_ib_dev *dev);
int mlx5_mr_cache_cleanup(struct mlx5_ib_dev *dev);

69
drivers/infiniband/hw/mlx5/qp.c
View File

@ -1053,7 +1053,8 @@ static u32 get_rx_type(struct mlx5_ib_qp *qp, struct ib_qp_init_attr *attr)
static int is_connected(enum ib_qp_type qp_type)
{
if (qp_type == IB_QPT_RC || qp_type == IB_QPT_UC)
if (qp_type == IB_QPT_RC || qp_type == IB_QPT_UC ||
qp_type == MLX5_IB_QPT_DCI)
return 1;
return 0;
@ -1684,6 +1685,49 @@ err:
return err;
}
static void configure_responder_scat_cqe(struct ib_qp_init_attr *init_attr,
void *qpc)
{
int rcqe_sz;
if (init_attr->qp_type == MLX5_IB_QPT_DCI)
return;
rcqe_sz = mlx5_ib_get_cqe_size(init_attr->recv_cq);
if (rcqe_sz == 128) {
MLX5_SET(qpc, qpc, cs_res, MLX5_RES_SCAT_DATA64_CQE);
return;
}
if (init_attr->qp_type != MLX5_IB_QPT_DCT)
MLX5_SET(qpc, qpc, cs_res, MLX5_RES_SCAT_DATA32_CQE);
}
static void configure_requester_scat_cqe(struct mlx5_ib_dev *dev,
struct ib_qp_init_attr *init_attr,
void *qpc)
{
enum ib_qp_type qpt = init_attr->qp_type;
int scqe_sz;
if (qpt == IB_QPT_UC || qpt == IB_QPT_UD)
return;
if (init_attr->sq_sig_type != IB_SIGNAL_ALL_WR)
return;
scqe_sz = mlx5_ib_get_cqe_size(init_attr->send_cq);
if (scqe_sz == 128) {
MLX5_SET(qpc, qpc, cs_req, MLX5_REQ_SCAT_DATA64_CQE);
return;
}
if (init_attr->qp_type != MLX5_IB_QPT_DCI ||
MLX5_CAP_GEN(dev->mdev, dc_req_scat_data_cqe))
MLX5_SET(qpc, qpc, cs_req, MLX5_REQ_SCAT_DATA32_CQE);
}
static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata, struct mlx5_ib_qp *qp)
@ -1787,6 +1831,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
return err;
qp->wq_sig = !!(ucmd.flags & MLX5_QP_FLAG_SIGNATURE);
if (MLX5_CAP_GEN(dev->mdev, sctr_data_cqe))
qp->scat_cqe = !!(ucmd.flags & MLX5_QP_FLAG_SCATTER_CQE);
if (ucmd.flags & MLX5_QP_FLAG_TUNNEL_OFFLOADS) {
if (init_attr->qp_type != IB_QPT_RAW_PACKET ||
@ -1911,23 +1956,8 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
MLX5_SET(qpc, qpc, cd_slave_receive, 1);
if (qp->scat_cqe && is_connected(init_attr->qp_type)) {
int rcqe_sz;
int scqe_sz;
rcqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->recv_cq);
scqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->send_cq);
if (rcqe_sz == 128)
MLX5_SET(qpc, qpc, cs_res, MLX5_RES_SCAT_DATA64_CQE);
else
MLX5_SET(qpc, qpc, cs_res, MLX5_RES_SCAT_DATA32_CQE);
if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) {
if (scqe_sz == 128)
MLX5_SET(qpc, qpc, cs_req, MLX5_REQ_SCAT_DATA64_CQE);
else
MLX5_SET(qpc, qpc, cs_req, MLX5_REQ_SCAT_DATA32_CQE);
}
configure_responder_scat_cqe(init_attr, qpc);
configure_requester_scat_cqe(dev, init_attr, qpc);
}
if (qp->rq.wqe_cnt) {
@ -2302,6 +2332,9 @@ static struct ib_qp *mlx5_ib_create_dct(struct ib_pd *pd,
MLX5_SET64(dctc, dctc, dc_access_key, ucmd->access_key);
MLX5_SET(dctc, dctc, user_index, uidx);
if (ucmd->flags & MLX5_QP_FLAG_SCATTER_CQE)
configure_responder_scat_cqe(attr, dctc);
qp->state = IB_QPS_RESET;
return &qp->ibqp;