1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright(c) 1999 - 2018 Intel Corporation. */ 3 4 #ifndef _DCB_CONFIG_H_ 5 #define _DCB_CONFIG_H_ 6 7 #include <linux/dcbnl.h> 8 #include "ixgbe_type.h" 9 10 /* DCB data structures */ 11 12 #define IXGBE_MAX_PACKET_BUFFERS 8 13 #define MAX_USER_PRIORITY 8 14 #define MAX_BW_GROUP 8 15 #define BW_PERCENT 100 16 17 #define DCB_TX_CONFIG 0 18 #define DCB_RX_CONFIG 1 19 20 /* DCB error Codes */ 21 #define DCB_SUCCESS 0 22 #define DCB_ERR_CONFIG -1 23 #define DCB_ERR_PARAM -2 24 25 /* Transmit and receive Errors */ 26 /* Error in bandwidth group allocation */ 27 #define DCB_ERR_BW_GROUP -3 28 /* Error in traffic class bandwidth allocation */ 29 #define DCB_ERR_TC_BW -4 30 /* Traffic class has both link strict and group strict enabled */ 31 #define DCB_ERR_LS_GS -5 32 /* Link strict traffic class has non zero bandwidth */ 33 #define DCB_ERR_LS_BW_NONZERO -6 34 /* Link strict bandwidth group has non zero bandwidth */ 35 #define DCB_ERR_LS_BWG_NONZERO -7 36 /* Traffic class has zero bandwidth */ 37 #define DCB_ERR_TC_BW_ZERO -8 38 39 #define DCB_NOT_IMPLEMENTED 0x7FFFFFFF 40 41 struct dcb_pfc_tc_debug { 42 u8 tc; 43 u8 pause_status; 44 u64 pause_quanta; 45 }; 46 47 enum strict_prio_type { 48 prio_none = 0, 49 prio_group, 50 prio_link 51 }; 52 53 /* DCB capability definitions */ 54 #define IXGBE_DCB_PG_SUPPORT 0x00000001 55 #define IXGBE_DCB_PFC_SUPPORT 0x00000002 56 #define IXGBE_DCB_BCN_SUPPORT 0x00000004 57 #define IXGBE_DCB_UP2TC_SUPPORT 0x00000008 58 #define IXGBE_DCB_GSP_SUPPORT 0x00000010 59 60 #define IXGBE_DCB_8_TC_SUPPORT 0x80 61 62 struct dcb_support { 63 /* DCB capabilities */ 64 u32 capabilities; 65 66 /* Each bit represents a number of TCs configurable in the hw. 67 * If 8 traffic classes can be configured, the value is 0x80. 68 */ 69 u8 traffic_classes; 70 u8 pfc_traffic_classes; 71 }; 72 73 /* Traffic class bandwidth allocation per direction */ 74 struct tc_bw_alloc { 75 u8 bwg_id; /* Bandwidth Group (BWG) ID */ 76 u8 bwg_percent; /* % of BWG's bandwidth */ 77 u8 link_percent; /* % of link bandwidth */ 78 u8 up_to_tc_bitmap; /* User Priority to Traffic Class mapping */ 79 u16 data_credits_refill; /* Credit refill amount in 64B granularity */ 80 u16 data_credits_max; /* Max credits for a configured packet buffer 81 * in 64B granularity.*/ 82 enum strict_prio_type prio_type; /* Link or Group Strict Priority */ 83 }; 84 85 enum dcb_pfc_type { 86 pfc_disabled = 0, 87 pfc_enabled_full, 88 pfc_enabled_tx, 89 pfc_enabled_rx 90 }; 91 92 /* Traffic class configuration */ 93 struct tc_configuration { 94 struct tc_bw_alloc path[2]; /* One each for Tx/Rx */ 95 enum dcb_pfc_type dcb_pfc; /* Class based flow control setting */ 96 97 u16 desc_credits_max; /* For Tx Descriptor arbitration */ 98 u8 tc; /* Traffic class (TC) */ 99 }; 100 101 struct dcb_num_tcs { 102 u8 pg_tcs; 103 u8 pfc_tcs; 104 }; 105 106 struct ixgbe_dcb_config { 107 struct dcb_support support; 108 struct dcb_num_tcs num_tcs; 109 struct tc_configuration tc_config[MAX_TRAFFIC_CLASS]; 110 u8 bw_percentage[2][MAX_BW_GROUP]; /* One each for Tx/Rx */ 111 bool pfc_mode_enable; 112 113 u32 dcb_cfg_version; /* Not used...OS-specific? */ 114 u32 link_speed; /* For bandwidth allocation validation purpose */ 115 }; 116 117 /* DCB driver APIs */ 118 void ixgbe_dcb_unpack_pfc(struct ixgbe_dcb_config *cfg, u8 *pfc_en); 119 void ixgbe_dcb_unpack_refill(struct ixgbe_dcb_config *, int, u16 *); 120 void ixgbe_dcb_unpack_max(struct ixgbe_dcb_config *, u16 *); 121 void ixgbe_dcb_unpack_bwgid(struct ixgbe_dcb_config *, int, u8 *); 122 void ixgbe_dcb_unpack_prio(struct ixgbe_dcb_config *, int, u8 *); 123 void ixgbe_dcb_unpack_map(struct ixgbe_dcb_config *, int, u8 *); 124 u8 ixgbe_dcb_get_tc_from_up(struct ixgbe_dcb_config *, int, u8); 125 126 /* DCB credits calculation */ 127 int ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *, 128 struct ixgbe_dcb_config *, int, u8); 129 130 /* DCB hw initialization */ 131 int ixgbe_dcb_hw_ets(struct ixgbe_hw *hw, struct ieee_ets *ets, int max); 132 int ixgbe_dcb_hw_ets_config(struct ixgbe_hw *hw, u16 *refill, u16 *max, 133 u8 *bwg_id, u8 *prio_type, u8 *tc_prio); 134 int ixgbe_dcb_hw_pfc_config(struct ixgbe_hw *hw, u8 pfc_en, u8 *tc_prio); 135 int ixgbe_dcb_hw_config(struct ixgbe_hw *, struct ixgbe_dcb_config *); 136 137 void ixgbe_dcb_read_rtrup2tc(struct ixgbe_hw *hw, u8 *map); 138 139 /* DCB definitions for credit calculation */ 140 #define DCB_CREDIT_QUANTUM 64 /* DCB Quantum */ 141 #define MAX_CREDIT_REFILL 511 /* 0x1FF * 64B = 32704B */ 142 #define DCB_MAX_TSO_SIZE (32*1024) /* MAX TSO packet size supported in DCB mode */ 143 #define MINIMUM_CREDIT_FOR_TSO (DCB_MAX_TSO_SIZE/64 + 1) /* 513 for 32KB TSO packet */ 144 #define MAX_CREDIT 4095 /* Maximum credit supported: 256KB * 1204 / 64B */ 145 146 #endif /* _DCB_CONFIG_H */ 147