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Commit 3f2b7edd authored by Ilan Tayari's avatar Ilan Tayari Committed by Saeed Mahameed
Browse files

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: default avatarIlan Tayari <ilant@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent 4b673793

drivers/net/ethernet/mellanox/mlx5/core/wq.c

+46 −0
Original line number Diff line number Diff line
@@ -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 @@ int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param, 
	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)

drivers/net/ethernet/mellanox/mlx5/core/wq.h

+10 −0
Original line number Diff line number Diff line
@@ -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);