ethernet-tx.c | Explore in Territory

// SPDX-License-Identifier: GPL-2.0
/*
 * This file is based on code from OCTEON SDK by Cavium Networks.
 *
 * Copyright (c) 2003-2010 Cavium Networks
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ip.h>
#include <linux/ratelimit.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <net/dst.h>
#ifdef CONFIG_XFRM
#include <linux/xfrm.h>
#include <net/xfrm.h>
#endif /* CONFIG_XFRM */

#include <linux/atomic.h>
#include <net/sch_generic.h>

#include "octeon-ethernet.h"
#include "ethernet-defines.h"
#include "ethernet-tx.h"
#include "ethernet-util.h"

#define CVM_OCT_SKB_CB(skb) …

/*
 * You can define GET_SKBUFF_QOS() to override how the skbuff output
 * function determines which output queue is used. The default
 * implementation always uses the base queue for the port. If, for
 * example, you wanted to use the skb->priority field, define
 * GET_SKBUFF_QOS as: #define GET_SKBUFF_QOS(skb) ((skb)->priority)
 */
#ifndef GET_SKBUFF_QOS
#define GET_SKBUFF_QOS(skb) …
#endif

static void cvm_oct_tx_do_cleanup(unsigned long arg);
static DECLARE_TASKLET_OLD(cvm_oct_tx_cleanup_tasklet, cvm_oct_tx_do_cleanup);

/* Maximum number of SKBs to try to free per xmit packet. */
#define MAX_SKB_TO_FREE …

static inline int cvm_oct_adjust_skb_to_free(int skb_to_free, int fau)
{ … }

static void cvm_oct_kick_tx_poll_watchdog(void)
{ … }

static void cvm_oct_free_tx_skbs(struct net_device *dev)
{ … }

/**
 * cvm_oct_xmit - transmit a packet
 * @skb:    Packet to send
 * @dev:    Device info structure
 *
 * Returns Always returns NETDEV_TX_OK
 */
netdev_tx_t cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev)
{ … }

/**
 * cvm_oct_xmit_pow - transmit a packet to the POW
 * @skb:    Packet to send
 * @dev:    Device info structure
 * Returns Always returns zero
 */
netdev_tx_t cvm_oct_xmit_pow(struct sk_buff *skb, struct net_device *dev)
{ … }

/**
 * cvm_oct_tx_shutdown_dev - free all skb that are currently queued for TX.
 * @dev:    Device being shutdown
 *
 */
void cvm_oct_tx_shutdown_dev(struct net_device *dev)
{ … }

static void cvm_oct_tx_do_cleanup(unsigned long arg)
{ … }

static irqreturn_t cvm_oct_tx_cleanup_watchdog(int cpl, void *dev_id)
{ … }

void cvm_oct_tx_initialize(void)
{ … }

void cvm_oct_tx_shutdown(void)
{ … }
linux/drivers/staging/octeon/ethernet-tx.c
