wq.h

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    1 /*-
    2  * Copyright (c) 2013-2017, Mellanox Technologies, Ltd.  All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
   14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   16  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
   17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   23  * SUCH DAMAGE.
   24  *
   25  * $FreeBSD$
   26  */
   27 
   28 #ifndef __MLX5_WQ_H__
   29 #define __MLX5_WQ_H__
   30 
   31 #include <dev/mlx5/mlx5_ifc.h>
   32 
   33 struct mlx5_wq_param {
   34         int             linear;
   35 };
   36 
   37 struct mlx5_wq_ctrl {
   38         struct mlx5_core_dev    *mdev;
   39         struct mlx5_buf         buf;
   40         struct mlx5_db          db;
   41 };
   42 
   43 struct mlx5_frag_wq_ctrl {
   44         struct mlx5_core_dev    *mdev;
   45         struct mlx5_frag_buf    frag_buf;
   46         struct mlx5_db          db;
   47 };
   48 
   49 struct mlx5_wq_cyc {
   50         void                    *buf;
   51         __be32                  *db;
   52         u16                     sz_m1;
   53         u8                      log_stride;
   54 };
   55 
   56 struct mlx5_wq_qp {
   57         struct mlx5_wq_cyc      rq;
   58         struct mlx5_wq_cyc      sq;
   59 };
   60 
   61 struct mlx5_cqwq {
   62         void                    *buf;
   63         __be32                  *db;
   64         u32                     sz_m1;
   65         u32                     cc; /* consumer counter */
   66         u8                      log_sz;
   67         u8                      log_stride;
   68 };
   69 
   70 struct mlx5_wq_ll {
   71         void                    *buf;
   72         __be32                  *db;
   73         __be16                  *tail_next;
   74         u16                     sz_m1;
   75         u16                     head;
   76         u16                     wqe_ctr;
   77         u16                     cur_sz;
   78         u8                      log_stride;
   79 };
   80 
   81 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
   82                        void *wqc, struct mlx5_wq_cyc *wq,
   83                        struct mlx5_wq_ctrl *wq_ctrl);
   84 u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
   85 
   86 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
   87                      void *cqc, struct mlx5_cqwq *wq,
   88                      struct mlx5_wq_ctrl *wq_ctrl);
   89 u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq);
   90 
   91 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
   92                       void *wqc, struct mlx5_wq_ll *wq,
   93                       struct mlx5_wq_ctrl *wq_ctrl);
   94 u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq);
   95 
   96 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
   97 
   98 static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
   99 {
  100         return ctr & wq->sz_m1;
  101 }
  102 
  103 static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)
  104 {
  105         return wq->buf + (ix << wq->log_stride);
  106 }
  107 
  108 static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
  109 {
  110         int equal   = (cc1 == cc2);
  111         int smaller = 0x8000 & (cc1 - cc2);
  112 
  113         return !equal && !smaller;
  114 }
  115 
  116 static inline u32 mlx5_cqwq_get_ci(struct mlx5_cqwq *wq)
  117 {
  118         return wq->cc & wq->sz_m1;
  119 }
  120 
  121 static inline void *mlx5_cqwq_get_wqe(struct mlx5_cqwq *wq, u32 ix)
  122 {
  123         return wq->buf + (ix << wq->log_stride);
  124 }
  125 
  126 static inline u32 mlx5_cqwq_get_wrap_cnt(struct mlx5_cqwq *wq)
  127 {
  128         return wq->cc >> wq->log_sz;
  129 }
  130 
  131 static inline void mlx5_cqwq_pop(struct mlx5_cqwq *wq)
  132 {
  133         wq->cc++;
  134 }
  135 
  136 static inline void mlx5_cqwq_update_db_record(struct mlx5_cqwq *wq)
  137 {
  138         *wq->db = cpu_to_be32(wq->cc & 0xffffff);
  139 }
  140 
  141 static inline int mlx5_wq_ll_is_full(struct mlx5_wq_ll *wq)
  142 {
  143         return wq->cur_sz == wq->sz_m1;
  144 }
  145 
  146 static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
  147 {
  148         return !wq->cur_sz;
  149 }
  150 
  151 static inline void mlx5_wq_ll_push(struct mlx5_wq_ll *wq, u16 head_next)
  152 {
  153         wq->head = head_next;
  154         wq->wqe_ctr++;
  155         wq->cur_sz++;
  156 }
  157 
  158 static inline void mlx5_wq_ll_pop(struct mlx5_wq_ll *wq, __be16 ix,
  159                                   __be16 *next_tail_next)
  160 {
  161         *wq->tail_next = ix;
  162         wq->tail_next = next_tail_next;
  163         wq->cur_sz--;
  164 }
  165 static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
  166 {
  167         *wq->db = cpu_to_be32(wq->wqe_ctr);
  168 }
  169 
  170 static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)
  171 {
  172         return wq->buf + (ix << wq->log_stride);
  173 }
  174 
  175 #endif /* __MLX5_WQ_H__ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/mlx5/mlx5_core/wq.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/mlx5/mlx5_core/wq.h