LXR linux/drivers/net/ethernet/mellanox/mlx5/core/en/port

   1/*
   2 * Copyright (c) 2018, Mellanox Technologies. All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 */
  32#ifndef __MLX5_EN_PORT_BUFFER_H__
  33#define __MLX5_EN_PORT_BUFFER_H__
  34
  35#include "en.h"
  36#include "port.h"
  37
  38#define MLX5E_MAX_BUFFER 8
  39#define MLX5E_BUFFER_CELL_SHIFT 7
  40#define MLX5E_DEFAULT_CABLE_LEN 7 /* 7 meters */
  41
  42#define MLX5_BUFFER_SUPPORTED(mdev) (MLX5_CAP_GEN(mdev, pcam_reg) && \
  43                                     MLX5_CAP_PCAM_REG(mdev, pbmc) && \
  44                                     MLX5_CAP_PCAM_REG(mdev, pptb))
  45
  46enum {
  47        MLX5E_PORT_BUFFER_CABLE_LEN   = BIT(0),
  48        MLX5E_PORT_BUFFER_PFC         = BIT(1),
  49        MLX5E_PORT_BUFFER_PRIO2BUFFER = BIT(2),
  50        MLX5E_PORT_BUFFER_SIZE        = BIT(3),
  51};
  52
  53struct mlx5e_bufferx_reg {
  54        u8   lossy;
  55        u8   epsb;
  56        u32  size;
  57        u32  xoff;
  58        u32  xon;
  59};
  60
  61struct mlx5e_port_buffer {
  62        u32                       port_buffer_size;
  63        u32                       spare_buffer_size;
  64        struct mlx5e_bufferx_reg  buffer[MLX5E_MAX_BUFFER];
  65};
  66
  67int mlx5e_port_manual_buffer_config(struct mlx5e_priv *priv,
  68                                    u32 change, unsigned int mtu,
  69                                    struct ieee_pfc *pfc,
  70                                    u32 *buffer_size,
  71                                    u8 *prio2buffer);
  72
  73int mlx5e_port_query_buffer(struct mlx5e_priv *priv,
  74                            struct mlx5e_port_buffer *port_buffer);
  75#endif
  76