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