port_buffer.h

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    1 /*-
    2  * Copyright (c) 2018-2019 Mellanox Technologies. 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_EN_PORT_BUFFER_H__
   29 #define __MLX5_EN_PORT_BUFFER_H__
   30 
   31 #include <dev/mlx5/mlx5_en/en.h>
   32 #include <dev/mlx5/port.h>
   33 
   34 #define MLX5E_MAX_BUFFER 8
   35 #define MLX5E_BUFFER_CELL_SHIFT 7
   36 #define MLX5E_DEFAULT_CABLE_LEN 7 /* 7 meters */
   37 
   38 #define MLX5_BUFFER_SUPPORTED(mdev) (MLX5_CAP_GEN(mdev, pcam_reg) && \
   39                                      MLX5_CAP_PCAM_REG(mdev, pbmc) && \
   40                                      MLX5_CAP_PCAM_REG(mdev, pptb))
   41 
   42 enum {
   43         MLX5E_PORT_BUFFER_CABLE_LEN   = BIT(0),
   44         MLX5E_PORT_BUFFER_PFC         = BIT(1),
   45         MLX5E_PORT_BUFFER_PRIO2BUFFER = BIT(2),
   46         MLX5E_PORT_BUFFER_SIZE        = BIT(3),
   47 };
   48 
   49 struct mlx5e_bufferx_reg {
   50         u8   lossy;
   51         u8   epsb;
   52         u32  size;
   53         u32  xoff;
   54         u32  xon;
   55 };
   56 
   57 struct mlx5e_port_buffer {
   58         u32                       port_buffer_size;
   59         u32                       spare_buffer_size;
   60         struct mlx5e_bufferx_reg  buffer[MLX5E_MAX_BUFFER];
   61 };
   62 
   63 #define IEEE_8021QAZ_MAX_TCS    8
   64 
   65 struct ieee_pfc {
   66         __u8    pfc_cap;
   67         __u8    pfc_en;
   68         __u8    mbc;
   69         __u16   delay;
   70         __u64   requests[IEEE_8021QAZ_MAX_TCS];
   71         __u64   indications[IEEE_8021QAZ_MAX_TCS];
   72 };
   73 
   74 int mlx5e_port_manual_buffer_config(struct mlx5e_priv *priv,
   75                                     u32 change, unsigned int mtu,
   76                                     struct ieee_pfc *pfc,
   77                                     u32 *buffer_size,
   78                                     u8 *prio2buffer);
   79 
   80 int mlx5e_port_query_buffer(struct mlx5e_priv *priv,
   81                             struct mlx5e_port_buffer *port_buffer);
   82 #endif

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FreeBSD/Linux Kernel Cross Reference sys/dev/mlx5/mlx5_en/port_buffer.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/mlx5/mlx5_en/port_buffer.h