dc7e38ac4d
from Mellanox Technologies. The current driver supports ethernet speeds up to and including 100 GBit/s. Infiniband support will be done later. The code added is not compiled by default, which will be done by a separate commit. Sponsored by: Mellanox Technologies MFC after: 2 weeks
167 lines
4.2 KiB
C
167 lines
4.2 KiB
C
/*-
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* Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __MLX5_WQ_H__
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#define __MLX5_WQ_H__
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#include <dev/mlx5/mlx5_ifc.h>
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struct mlx5_wq_param {
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int linear;
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int buf_numa_node;
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int db_numa_node;
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};
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struct mlx5_wq_ctrl {
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struct mlx5_core_dev *mdev;
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struct mlx5_buf buf;
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struct mlx5_db db;
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};
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struct mlx5_wq_cyc {
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void *buf;
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__be32 *db;
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u16 sz_m1;
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u8 log_stride;
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};
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struct mlx5_cqwq {
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void *buf;
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__be32 *db;
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u32 sz_m1;
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u32 cc; /* consumer counter */
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u8 log_sz;
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u8 log_stride;
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};
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struct mlx5_wq_ll {
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void *buf;
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__be32 *db;
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__be16 *tail_next;
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u16 sz_m1;
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u16 head;
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u16 wqe_ctr;
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u16 cur_sz;
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u8 log_stride;
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};
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int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
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void *wqc, struct mlx5_wq_cyc *wq,
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struct mlx5_wq_ctrl *wq_ctrl);
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u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
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int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
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void *cqc, struct mlx5_cqwq *wq,
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struct mlx5_wq_ctrl *wq_ctrl);
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u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq);
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int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
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void *wqc, struct mlx5_wq_ll *wq,
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struct mlx5_wq_ctrl *wq_ctrl);
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u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq);
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void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
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static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
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{
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return ctr & wq->sz_m1;
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}
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static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)
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{
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return wq->buf + (ix << wq->log_stride);
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}
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static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
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{
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int equal = (cc1 == cc2);
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int smaller = 0x8000 & (cc1 - cc2);
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return !equal && !smaller;
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}
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static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
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{
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return wq->cc & wq->sz_m1;
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}
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static inline void *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix)
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{
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return wq->buf + (ix << wq->log_stride);
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}
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static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
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{
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return wq->cc >> wq->log_sz;
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}
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static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
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{
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wq->cc++;
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}
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static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
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{
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*wq->db = cpu_to_be32(wq->cc & 0xffffff);
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}
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static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
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{
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return wq->cur_sz == wq->sz_m1;
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}
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static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
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{
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return !wq->cur_sz;
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}
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static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
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{
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wq->head = head_next;
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wq->wqe_ctr++;
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wq->cur_sz++;
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}
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static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
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__be16 *next_tail_next)
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{
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*wq->tail_next = ix;
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wq->tail_next = next_tail_next;
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wq->cur_sz--;
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}
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static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
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{
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*wq->db = cpu_to_be32(wq->wqe_ctr);
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}
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static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)
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{
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return wq->buf + (ix << wq->log_stride);
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}
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#endif /* __MLX5_WQ_H__ */
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