linux/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 1999 - 2018 Intel Corporation. */

#include "ixgbe.h"
#include "ixgbe_type.h"
#include "ixgbe_dcb.h"
#include "ixgbe_dcb_82598.h"
#include "ixgbe_dcb_82599.h"

/**
 * ixgbe_ieee_credits - This calculates the ieee traffic class
 * credits from the configured bandwidth percentages. Credits
 * are the smallest unit programmable into the underlying
 * hardware. The IEEE 802.1Qaz specification do not use bandwidth
 * groups so this is much simplified from the CEE case.
 * @bw: bandwidth index by traffic class
 * @refill: refill credits index by traffic class
 * @max: max credits by traffic class
 * @max_frame: maximum frame size
 */
static int ixgbe_ieee_credits(__u8 *bw, __u16 *refill,
			      __u16 *max, int max_frame)
{ … }

/**
 * ixgbe_dcb_calculate_tc_credits - Calculates traffic class credits
 * @hw: pointer to hardware structure
 * @dcb_config: Struct containing DCB settings
 * @max_frame: Maximum frame size
 * @direction: Configuring either Tx or Rx
 *
 * This function calculates the credits allocated to each traffic class.
 * It should be called only after the rules are checked by
 * ixgbe_dcb_check_config().
 */
int ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *hw,
				   struct ixgbe_dcb_config *dcb_config,
				   int max_frame, u8 direction)
{ … }

void ixgbe_dcb_unpack_pfc(struct ixgbe_dcb_config *cfg, u8 *pfc_en)
{ … }

void ixgbe_dcb_unpack_refill(struct ixgbe_dcb_config *cfg, int direction,
			     u16 *refill)
{ … }

void ixgbe_dcb_unpack_max(struct ixgbe_dcb_config *cfg, u16 *max)
{ … }

void ixgbe_dcb_unpack_bwgid(struct ixgbe_dcb_config *cfg, int direction,
			    u8 *bwgid)
{ … }

void ixgbe_dcb_unpack_prio(struct ixgbe_dcb_config *cfg, int direction,
			    u8 *ptype)
{ … }

u8 ixgbe_dcb_get_tc_from_up(struct ixgbe_dcb_config *cfg, int direction, u8 up)
{ … }

void ixgbe_dcb_unpack_map(struct ixgbe_dcb_config *cfg, int direction, u8 *map)
{ … }

/**
 * ixgbe_dcb_hw_config - Config and enable DCB
 * @hw: pointer to hardware structure
 * @dcb_config: pointer to ixgbe_dcb_config structure
 *
 * Configure dcb settings and enable dcb mode.
 */
int ixgbe_dcb_hw_config(struct ixgbe_hw *hw,
			struct ixgbe_dcb_config *dcb_config)
{ … }

/* Helper routines to abstract HW specifics from DCB netlink ops */
int ixgbe_dcb_hw_pfc_config(struct ixgbe_hw *hw, u8 pfc_en, u8 *prio_tc)
{ … }

int ixgbe_dcb_hw_ets(struct ixgbe_hw *hw, struct ieee_ets *ets, int max_frame)
{ … }

int ixgbe_dcb_hw_ets_config(struct ixgbe_hw *hw,
			    u16 *refill, u16 *max, u8 *bwg_id,
			    u8 *prio_type, u8 *prio_tc)
{ … }

static void ixgbe_dcb_read_rtrup2tc_82599(struct ixgbe_hw *hw, u8 *map)
{ … }

void ixgbe_dcb_read_rtrup2tc(struct ixgbe_hw *hw, u8 *map)
{ … }