1 /****************************************************************************** 2 SPDX-License-Identifier: BSD-3-Clause 3 4 Copyright (c) 2001-2020, Intel Corporation 5 All rights reserved. 6 7 Redistribution and use in source and binary forms, with or without 8 modification, are permitted provided that the following conditions are met: 9 10 1. Redistributions of source code must retain the above copyright notice, 11 this list of conditions and the following disclaimer. 12 13 2. Redistributions in binary form must reproduce the above copyright 14 notice, this list of conditions and the following disclaimer in the 15 documentation and/or other materials provided with the distribution. 16 17 3. Neither the name of the Intel Corporation nor the names of its 18 contributors may be used to endorse or promote products derived from 19 this software without specific prior written permission. 20 21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 25 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 POSSIBILITY OF SUCH DAMAGE. 32 33 ******************************************************************************/ 34 35 #ifndef _IXGBE_DCB_H_ 36 #define _IXGBE_DCB_H_ 37 38 #include "ixgbe_type.h" 39 40 /* DCB defines */ 41 /* DCB credit calculation defines */ 42 #define IXGBE_DCB_CREDIT_QUANTUM 64 43 #define IXGBE_DCB_MAX_CREDIT_REFILL 511 /* 0x1FF * 64B = 32704B */ 44 #define IXGBE_DCB_MAX_TSO_SIZE (32 * 1024) /* Max TSO pkt size in DCB*/ 45 #define IXGBE_DCB_MAX_CREDIT 4095 /* Maximum credit supported: 256KB * 1024 / 64B */ 46 47 /* 513 for 32KB TSO packet */ 48 #define IXGBE_DCB_MIN_TSO_CREDIT \ 49 ((IXGBE_DCB_MAX_TSO_SIZE / IXGBE_DCB_CREDIT_QUANTUM) + 1) 50 51 /* DCB configuration defines */ 52 #define IXGBE_DCB_MAX_USER_PRIORITY 8 53 #define IXGBE_DCB_MAX_BW_GROUP 8 54 #define IXGBE_DCB_BW_PERCENT 100 55 56 #define IXGBE_DCB_TX_CONFIG 0 57 #define IXGBE_DCB_RX_CONFIG 1 58 59 /* DCB capability defines */ 60 #define IXGBE_DCB_PG_SUPPORT 0x00000001 61 #define IXGBE_DCB_PFC_SUPPORT 0x00000002 62 #define IXGBE_DCB_BCN_SUPPORT 0x00000004 63 #define IXGBE_DCB_UP2TC_SUPPORT 0x00000008 64 #define IXGBE_DCB_GSP_SUPPORT 0x00000010 65 66 struct ixgbe_dcb_support { 67 u32 capabilities; /* DCB capabilities */ 68 69 /* Each bit represents a number of TCs configurable in the hw. 70 * If 8 traffic classes can be configured, the value is 0x80. */ 71 u8 traffic_classes; 72 u8 pfc_traffic_classes; 73 }; 74 75 enum ixgbe_dcb_tsa { 76 ixgbe_dcb_tsa_ets = 0, 77 ixgbe_dcb_tsa_group_strict_cee, 78 ixgbe_dcb_tsa_strict 79 }; 80 81 /* Traffic class bandwidth allocation per direction */ 82 struct ixgbe_dcb_tc_path { 83 u8 bwg_id; /* Bandwidth Group (BWG) ID */ 84 u8 bwg_percent; /* % of BWG's bandwidth */ 85 u8 link_percent; /* % of link bandwidth */ 86 u8 up_to_tc_bitmap; /* User Priority to Traffic Class mapping */ 87 u16 data_credits_refill; /* Credit refill amount in 64B granularity */ 88 u16 data_credits_max; /* Max credits for a configured packet buffer 89 * in 64B granularity.*/ 90 enum ixgbe_dcb_tsa tsa; /* Link or Group Strict Priority */ 91 }; 92 93 enum ixgbe_dcb_pfc { 94 ixgbe_dcb_pfc_disabled = 0, 95 ixgbe_dcb_pfc_enabled, 96 ixgbe_dcb_pfc_enabled_txonly, 97 ixgbe_dcb_pfc_enabled_rxonly 98 }; 99 100 /* Traffic class configuration */ 101 struct ixgbe_dcb_tc_config { 102 struct ixgbe_dcb_tc_path path[2]; /* One each for Tx/Rx */ 103 enum ixgbe_dcb_pfc pfc; /* Class based flow control setting */ 104 105 u16 desc_credits_max; /* For Tx Descriptor arbitration */ 106 u8 tc; /* Traffic class (TC) */ 107 }; 108 109 enum ixgbe_dcb_pba { 110 /* PBA[0-7] each use 64KB FIFO */ 111 ixgbe_dcb_pba_equal = PBA_STRATEGY_EQUAL, 112 /* PBA[0-3] each use 80KB, PBA[4-7] each use 48KB */ 113 ixgbe_dcb_pba_80_48 = PBA_STRATEGY_WEIGHTED 114 }; 115 116 struct ixgbe_dcb_num_tcs { 117 u8 pg_tcs; 118 u8 pfc_tcs; 119 }; 120 121 struct ixgbe_dcb_config { 122 struct ixgbe_dcb_tc_config tc_config[IXGBE_DCB_MAX_TRAFFIC_CLASS]; 123 struct ixgbe_dcb_support support; 124 struct ixgbe_dcb_num_tcs num_tcs; 125 u8 bw_percentage[2][IXGBE_DCB_MAX_BW_GROUP]; /* One each for Tx/Rx */ 126 bool pfc_mode_enable; 127 bool round_robin_enable; 128 129 enum ixgbe_dcb_pba rx_pba_cfg; 130 131 u32 dcb_cfg_version; /* Not used...OS-specific? */ 132 u32 link_speed; /* For bandwidth allocation validation purpose */ 133 bool vt_mode; 134 }; 135 136 /* DCB driver APIs */ 137 138 /* DCB rule checking */ 139 s32 ixgbe_dcb_check_config_cee(struct ixgbe_dcb_config *); 140 141 /* DCB credits calculation */ 142 s32 ixgbe_dcb_calculate_tc_credits(u8 *, u16 *, u16 *, int); 143 s32 ixgbe_dcb_calculate_tc_credits_cee(struct ixgbe_hw *, 144 struct ixgbe_dcb_config *, u32, u8); 145 146 /* DCB PFC */ 147 s32 ixgbe_dcb_config_pfc(struct ixgbe_hw *, u8, u8 *); 148 s32 ixgbe_dcb_config_pfc_cee(struct ixgbe_hw *, struct ixgbe_dcb_config *); 149 150 /* DCB stats */ 151 s32 ixgbe_dcb_config_tc_stats(struct ixgbe_hw *); 152 s32 ixgbe_dcb_get_tc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8); 153 s32 ixgbe_dcb_get_pfc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8); 154 155 /* DCB config arbiters */ 156 s32 ixgbe_dcb_config_tx_desc_arbiter_cee(struct ixgbe_hw *, 157 struct ixgbe_dcb_config *); 158 s32 ixgbe_dcb_config_tx_data_arbiter_cee(struct ixgbe_hw *, 159 struct ixgbe_dcb_config *); 160 s32 ixgbe_dcb_config_rx_arbiter_cee(struct ixgbe_hw *, 161 struct ixgbe_dcb_config *); 162 163 /* DCB unpack routines */ 164 void ixgbe_dcb_unpack_pfc_cee(struct ixgbe_dcb_config *, u8 *, u8 *); 165 void ixgbe_dcb_unpack_refill_cee(struct ixgbe_dcb_config *, int, u16 *); 166 void ixgbe_dcb_unpack_max_cee(struct ixgbe_dcb_config *, u16 *); 167 void ixgbe_dcb_unpack_bwgid_cee(struct ixgbe_dcb_config *, int, u8 *); 168 void ixgbe_dcb_unpack_tsa_cee(struct ixgbe_dcb_config *, int, u8 *); 169 void ixgbe_dcb_unpack_map_cee(struct ixgbe_dcb_config *, int, u8 *); 170 u8 ixgbe_dcb_get_tc_from_up(struct ixgbe_dcb_config *, int, u8); 171 172 /* DCB initialization */ 173 s32 ixgbe_dcb_hw_config(struct ixgbe_hw *, u16 *, u16 *, u8 *, u8 *, u8 *); 174 s32 ixgbe_dcb_hw_config_cee(struct ixgbe_hw *, struct ixgbe_dcb_config *); 175 #endif /* _IXGBE_DCB_H_ */ 176