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_NETWORK_BUFFER 8
39#define MLX5E_TOTAL_BUFFERS 10
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 u32 headroom_size; /* Buffers 0-7 */
65 u32 internal_buffers_size; /* Buffers 8-9 */
66 struct mlx5e_bufferx_reg buffer[MLX5E_MAX_NETWORK_BUFFER];
67};
68
69int mlx5e_port_manual_buffer_config(struct mlx5e_priv *priv,
70 u32 change, unsigned int mtu,
71 struct ieee_pfc *pfc,
72 u32 *buffer_size,
73 u8 *prio2buffer);
74
75int mlx5e_port_query_buffer(struct mlx5e_priv *priv,
76 struct mlx5e_port_buffer *port_buffer);
77#endif
78

source code of linux/drivers/net/ethernet/mellanox/mlx5/core/en/port_buffer.h