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net/mlx5: Add QP WQ support 

A QP in ConnectX is a concatenation of RQ and SQ which share a QP-number
and work together.
Add support for allocating and managing the work-queue buffer for a QP, in
a similar way to how SQs and RQs are already supported.

Signed-off-by: Ilan Tayari <ilant@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Ilan Tayari 2017-03-26 17:46:03 +03:00 committed by Saeed Mahameed
parent 4b67379376
commit 3f2b7edd7c
2 changed files with 56 additions and 0 deletions
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46
drivers/net/ethernet/mellanox/mlx5/core/wq.c
View File

@ -54,6 +54,12 @@ static u32 mlx5_wq_cyc_get_byte_size(struct mlx5_wq_cyc *wq)
return mlx5_wq_cyc_get_size(wq) << wq->log_stride;
}
static u32 mlx5_wq_qp_get_byte_size(struct mlx5_wq_qp *wq)
{
return mlx5_wq_cyc_get_byte_size(&wq->rq) +
mlx5_wq_cyc_get_byte_size(&wq->sq);
}
static u32 mlx5_cqwq_get_byte_size(struct mlx5_cqwq *wq)
{
return mlx5_cqwq_get_size(wq) << wq->log_stride;
@ -99,6 +105,46 @@ err_db_free:
return err;
}
int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *qpc, struct mlx5_wq_qp *wq,
struct mlx5_wq_ctrl *wq_ctrl)
{
int err;
wq->rq.log_stride = MLX5_GET(qpc, qpc, log_rq_stride) + 4;
wq->rq.sz_m1 = (1 << MLX5_GET(qpc, qpc, log_rq_size)) - 1;
wq->sq.log_stride = ilog2(MLX5_SEND_WQE_BB);
wq->sq.sz_m1 = (1 << MLX5_GET(qpc, qpc, log_sq_size)) - 1;
err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
if (err) {
mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
return err;
}
err = mlx5_buf_alloc_node(mdev, mlx5_wq_qp_get_byte_size(wq),
&wq_ctrl->buf, param->buf_numa_node);
if (err) {
mlx5_core_warn(mdev, "mlx5_buf_alloc_node() failed, %d\n", err);
goto err_db_free;
}
wq->rq.buf = wq_ctrl->buf.direct.buf;
wq->sq.buf = wq->rq.buf + mlx5_wq_cyc_get_byte_size(&wq->rq);
wq->rq.db = &wq_ctrl->db.db[MLX5_RCV_DBR];
wq->sq.db = &wq_ctrl->db.db[MLX5_SND_DBR];
wq_ctrl->mdev = mdev;
return 0;
err_db_free:
mlx5_db_free(mdev, &wq_ctrl->db);
return err;
}
int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *cqc, struct mlx5_cqwq *wq,
struct mlx5_frag_wq_ctrl *wq_ctrl)

10
drivers/net/ethernet/mellanox/mlx5/core/wq.h
View File

@ -35,6 +35,7 @@
#include <linux/mlx5/mlx5_ifc.h>
#include <linux/mlx5/cq.h>
#include <linux/mlx5/qp.h>
struct mlx5_wq_param {
int linear;
@ -61,6 +62,11 @@ struct mlx5_wq_cyc {
u8 log_stride;
};
struct mlx5_wq_qp {
struct mlx5_wq_cyc rq;
struct mlx5_wq_cyc sq;
};
struct mlx5_cqwq {
struct mlx5_frag_buf frag_buf;
__be32 *db;
@ -88,6 +94,10 @@ int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
struct mlx5_wq_ctrl *wq_ctrl);
u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *qpc, struct mlx5_wq_qp *wq,
struct mlx5_wq_ctrl *wq_ctrl);
int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *cqc, struct mlx5_cqwq *wq,
struct mlx5_frag_wq_ctrl *wq_ctrl);