drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c
Extension
.c
Size
3246 bytes
Lines
111
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) 2015 - 2023 Beijing WangXun Technology Co., Ltd. */

#include <linux/pci.h>
#include <linux/phy.h>
#include <linux/netdevice.h>

#include "../libwx/wx_ethtool.h"
#include "../libwx/wx_type.h"
#include "../libwx/wx_lib.h"
#include "../libwx/wx_hw.h"
#include "ngbe_ethtool.h"
#include "ngbe_type.h"

static int ngbe_set_ringparam(struct net_device *netdev,
			      struct ethtool_ringparam *ring,
			      struct kernel_ethtool_ringparam *kernel_ring,
			      struct netlink_ext_ack *extack)
{
	struct wx *wx = netdev_priv(netdev);
	u32 new_rx_count, new_tx_count;
	struct wx_ring *temp_ring;
	int i, err = 0;

	new_tx_count = clamp_t(u32, ring->tx_pending, WX_MIN_TXD, WX_MAX_TXD);
	new_tx_count = ALIGN(new_tx_count, WX_REQ_TX_DESCRIPTOR_MULTIPLE);

	new_rx_count = clamp_t(u32, ring->rx_pending, WX_MIN_RXD, WX_MAX_RXD);
	new_rx_count = ALIGN(new_rx_count, WX_REQ_RX_DESCRIPTOR_MULTIPLE);

	if (new_tx_count == wx->tx_ring_count &&
	    new_rx_count == wx->rx_ring_count)
		return 0;

	mutex_lock(&wx->reset_lock);
	set_bit(WX_STATE_RESETTING, wx->state);

	if (!netif_running(wx->netdev)) {
		for (i = 0; i < wx->num_tx_queues; i++)
			wx->tx_ring[i]->count = new_tx_count;
		for (i = 0; i < wx->num_rx_queues; i++)
			wx->rx_ring[i]->count = new_rx_count;
		wx->tx_ring_count = new_tx_count;
		wx->rx_ring_count = new_rx_count;

		goto clear_reset;
	}

	/* allocate temporary buffer to store rings in */
	i = max_t(int, wx->num_tx_queues, wx->num_rx_queues);
	temp_ring = kvmalloc_objs(struct wx_ring, i);
	if (!temp_ring) {
		err = -ENOMEM;
		goto clear_reset;
	}

	ngbe_down(wx);

	wx_set_ring(wx, new_tx_count, new_rx_count, temp_ring);
	kvfree(temp_ring);

	wx_configure(wx);
	ngbe_up(wx);

clear_reset:
	clear_bit(WX_STATE_RESETTING, wx->state);
	mutex_unlock(&wx->reset_lock);
	return err;
}

static const struct ethtool_ops ngbe_ethtool_ops = {
	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
				     ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ |
				     ETHTOOL_COALESCE_USE_ADAPTIVE,
	.get_drvinfo		= wx_get_drvinfo,
	.get_link		= ethtool_op_get_link,
	.get_link_ksettings	= wx_get_link_ksettings,
	.set_link_ksettings	= wx_set_link_ksettings,
	.nway_reset		= wx_nway_reset,
	.get_wol		= wx_get_wol,
	.set_wol		= wx_set_wol,
	.get_sset_count		= wx_get_sset_count,
	.get_strings		= wx_get_strings,
	.get_ethtool_stats	= wx_get_ethtool_stats,
	.get_eth_mac_stats	= wx_get_mac_stats,
	.get_pause_stats	= wx_get_pause_stats,
	.get_pauseparam		= wx_get_pauseparam,
	.set_pauseparam		= wx_set_pauseparam,
	.get_ringparam		= wx_get_ringparam,
	.set_ringparam		= ngbe_set_ringparam,

Annotation

Implementation Notes