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
46 enum {
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
53 struct mlx5e_bufferx_reg {
54 u8 lossy;
55 u8 epsb;
56 u32 size;
57 u32 xoff;
58 u32 xon;
59 };
60
61 struct mlx5e_port_buffer {
62 u32 port_buffer_size;
63 u32 spare_buffer_size;
64 struct mlx5e_bufferx_reg buffer[MLX5E_MAX_BUFFER];
65 };
66
67 int 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
73 int mlx5e_port_query_buffer(struct mlx5e_priv *priv,
74 struct mlx5e_port_buffer *port_buffer);
75 #endif