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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 813#define MAX_USER_PRIORITY 814#define MAX_BW_GROUP 815#define BW_PERCENT 10016 17#define DCB_TX_CONFIG 018#define DCB_RX_CONFIG 119 20/* DCB error Codes */21#define DCB_SUCCESS 022#define DCB_ERR_CONFIG -123#define DCB_ERR_PARAM -224 25/* Transmit and receive Errors */26/* Error in bandwidth group allocation */27#define DCB_ERR_BW_GROUP -328/* Error in traffic class bandwidth allocation */29#define DCB_ERR_TC_BW -430/* Traffic class has both link strict and group strict enabled */31#define DCB_ERR_LS_GS -532/* Link strict traffic class has non zero bandwidth */33#define DCB_ERR_LS_BW_NONZERO -634/* Link strict bandwidth group has non zero bandwidth */35#define DCB_ERR_LS_BWG_NONZERO -736/* Traffic class has zero bandwidth */37#define DCB_ERR_TC_BW_ZERO -838 39#define DCB_NOT_IMPLEMENTED 0x7FFFFFFF40 41struct dcb_pfc_tc_debug {42 u8 tc;43 u8 pause_status;44 u64 pause_quanta;45};46 47enum strict_prio_type {48 prio_none = 0,49 prio_group,50 prio_link51};52 53/* DCB capability definitions */54#define IXGBE_DCB_PG_SUPPORT 0x0000000155#define IXGBE_DCB_PFC_SUPPORT 0x0000000256#define IXGBE_DCB_BCN_SUPPORT 0x0000000457#define IXGBE_DCB_UP2TC_SUPPORT 0x0000000858#define IXGBE_DCB_GSP_SUPPORT 0x0000001059 60#define IXGBE_DCB_8_TC_SUPPORT 0x8061 62struct 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 */74struct 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 buffer81 * in 64B granularity.*/82 enum strict_prio_type prio_type; /* Link or Group Strict Priority */83};84 85enum dcb_pfc_type {86 pfc_disabled = 0,87 pfc_enabled_full,88 pfc_enabled_tx,89 pfc_enabled_rx90};91 92/* Traffic class configuration */93struct 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 101struct dcb_num_tcs {102 u8 pg_tcs;103 u8 pfc_tcs;104};105 106struct 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 */118void ixgbe_dcb_unpack_pfc(struct ixgbe_dcb_config *cfg, u8 *pfc_en);119void ixgbe_dcb_unpack_refill(struct ixgbe_dcb_config *, int, u16 *);120void ixgbe_dcb_unpack_max(struct ixgbe_dcb_config *, u16 *);121void ixgbe_dcb_unpack_bwgid(struct ixgbe_dcb_config *, int, u8 *);122void ixgbe_dcb_unpack_prio(struct ixgbe_dcb_config *, int, u8 *);123void ixgbe_dcb_unpack_map(struct ixgbe_dcb_config *, int, u8 *);124u8 ixgbe_dcb_get_tc_from_up(struct ixgbe_dcb_config *, int, u8);125 126/* DCB credits calculation */127int ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *,128 struct ixgbe_dcb_config *, int, u8);129 130/* DCB hw initialization */131int ixgbe_dcb_hw_ets(struct ixgbe_hw *hw, struct ieee_ets *ets, int max);132int ixgbe_dcb_hw_ets_config(struct ixgbe_hw *hw, u16 *refill, u16 *max,133 u8 *bwg_id, u8 *prio_type, u8 *tc_prio);134int ixgbe_dcb_hw_pfc_config(struct ixgbe_hw *hw, u8 pfc_en, u8 *tc_prio);135int ixgbe_dcb_hw_config(struct ixgbe_hw *, struct ixgbe_dcb_config *);136 137void 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