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 | |
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 | 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 | |
69 | int 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 | |
75 | int mlx5e_port_query_buffer(struct mlx5e_priv *priv, |
76 | struct mlx5e_port_buffer *port_buffer); |
77 | #endif |
78 | |