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_DEFAULT_CABLE_LEN 7 /* 7 meters */ 40 41 #define MLX5_BUFFER_SUPPORTED(mdev) (MLX5_CAP_GEN(mdev, pcam_reg) && \ 42 MLX5_CAP_PCAM_REG(mdev, pbmc) && \ 43 MLX5_CAP_PCAM_REG(mdev, pptb)) 44 45 enum { 46 MLX5E_PORT_BUFFER_CABLE_LEN = BIT(0), 47 MLX5E_PORT_BUFFER_PFC = BIT(1), 48 MLX5E_PORT_BUFFER_PRIO2BUFFER = BIT(2), 49 MLX5E_PORT_BUFFER_SIZE = BIT(3), 50 }; 51 52 struct mlx5e_bufferx_reg { 53 u8 lossy; 54 u8 epsb; 55 u32 size; 56 u32 xoff; 57 u32 xon; 58 }; 59 60 struct mlx5e_port_buffer { 61 u32 port_buffer_size; 62 u32 spare_buffer_size; 63 struct mlx5e_bufferx_reg buffer[MLX5E_MAX_BUFFER]; 64 }; 65 66 int mlx5e_port_manual_buffer_config(struct mlx5e_priv *priv, 67 u32 change, unsigned int mtu, 68 struct ieee_pfc *pfc, 69 u32 *buffer_size, 70 u8 *prio2buffer); 71 72 int mlx5e_port_query_buffer(struct mlx5e_priv *priv, 73 struct mlx5e_port_buffer *port_buffer); 74 #endif 75