drivers/net/ethernet/intel/fm10k/fm10k_dcbnl.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/intel/fm10k/fm10k_dcbnl.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/intel/fm10k/fm10k_dcbnl.c
Extension
.c
Size
4215 bytes
Lines
154
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2019 Intel Corporation. */

#include "fm10k.h"

/**
 * fm10k_dcbnl_ieee_getets - get the ETS configuration for the device
 * @dev: netdev interface for the device
 * @ets: ETS structure to push configuration to
 **/
static int fm10k_dcbnl_ieee_getets(struct net_device *dev, struct ieee_ets *ets)
{
	int i;

	/* we support 8 TCs in all modes */
	ets->ets_cap = IEEE_8021QAZ_MAX_TCS;
	ets->cbs = 0;

	/* we only support strict priority and cannot do traffic shaping */
	memset(ets->tc_tx_bw, 0, sizeof(ets->tc_tx_bw));
	memset(ets->tc_rx_bw, 0, sizeof(ets->tc_rx_bw));
	memset(ets->tc_tsa, IEEE_8021QAZ_TSA_STRICT, sizeof(ets->tc_tsa));

	/* populate the prio map based on the netdev */
	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
		ets->prio_tc[i] = netdev_get_prio_tc_map(dev, i);

	return 0;
}

/**
 * fm10k_dcbnl_ieee_setets - set the ETS configuration for the device
 * @dev: netdev interface for the device
 * @ets: ETS structure to pull configuration from
 **/
static int fm10k_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
{
	u8 num_tc = 0;
	int i;

	/* verify type and determine num_tcs needed */
	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
		if (ets->tc_tx_bw[i] || ets->tc_rx_bw[i])
			return -EINVAL;
		if (ets->tc_tsa[i] != IEEE_8021QAZ_TSA_STRICT)
			return -EINVAL;
		if (ets->prio_tc[i] > num_tc)
			num_tc = ets->prio_tc[i];
	}

	/* if requested TC is greater than 0 then num_tcs is max + 1 */
	if (num_tc)
		num_tc++;

	if (num_tc > IEEE_8021QAZ_MAX_TCS)
		return -EINVAL;

	/* update TC hardware mapping if necessary */
	if (num_tc != netdev_get_num_tc(dev)) {
		int err = fm10k_setup_tc(dev, num_tc);
		if (err)
			return err;
	}

	/* update priority mapping */
	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
		netdev_set_prio_tc_map(dev, i, ets->prio_tc[i]);

	return 0;
}

/**
 * fm10k_dcbnl_ieee_getpfc - get the PFC configuration for the device
 * @dev: netdev interface for the device
 * @pfc: PFC structure to push configuration to
 **/
static int fm10k_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
{
	struct fm10k_intfc *interface = netdev_priv(dev);

	/* record flow control max count and state of TCs */
	pfc->pfc_cap = IEEE_8021QAZ_MAX_TCS;
	pfc->pfc_en = interface->pfc_en;

	return 0;
}

/**
 * fm10k_dcbnl_ieee_setpfc - set the PFC configuration for the device
 * @dev: netdev interface for the device

Annotation

Implementation Notes