// SPDX-License-Identifier: GPL-2.0-only
/*
* Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
*
* Copyright (c) 2003 Intracom S.A.
* by Pantelis Antoniou <[email protected]>
*
* 2005 (c) MontaVista Software, Inc.
* Vitaly Bordug <[email protected]>
*
* Heavily based on original FEC driver by Dan Malek <[email protected]>
* and modifications by Joakim Tjernlund <[email protected]>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/bitops.h>
#include <linux/fs.h>
#include <linux/platform_device.h>
#include <linux/phy.h>
#include <linux/phylink.h>
#include <linux/property.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/pgtable.h>
#include <linux/rtnetlink.h>
#include <linux/vmalloc.h>
#include <asm/irq.h>
#include <linux/uaccess.h>
#include "fs_enet.h"
/*************************************************/
MODULE_AUTHOR("Pantelis Antoniou <[email protected]>");
MODULE_DESCRIPTION("Freescale Ethernet Driver");
MODULE_LICENSE("GPL");
static int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */
module_param(fs_enet_debug, int, 0);
MODULE_PARM_DESC(fs_enet_debug,
"Freescale bitmapped debugging message enable value");
#define RX_RING_SIZE 32
#define TX_RING_SIZE 64
#ifdef CONFIG_NET_POLL_CONTROLLER
static void fs_enet_netpoll(struct net_device *dev);
#endif
static void fs_set_multicast_list(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
(*fep->ops->set_multicast_list)(dev);
}
static int fs_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct fs_enet_private *fep = netdev_priv(dev);
return phylink_mii_ioctl(fep->phylink, ifr, cmd);
}
static void skb_align(struct sk_buff *skb, int align)
{
int off = ((unsigned long)skb->data) & (align - 1);
if (off)
skb_reserve(skb, align - off);
}
/* NAPI function */
static int fs_enet_napi(struct napi_struct *napi, int budget)
{
struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi);
const struct fs_platform_info *fpi = fep->fpi;
struct net_device *dev = fep->ndev;
int curidx, dirtyidx, received = 0;
int do_wake = 0, do_restart = 0;
int tx_left = TX_RING_SIZE;
struct sk_buff *skb, *skbn;
cbd_t __iomem *bdp;
u16 pkt_len, sc;
spin_lock(&fep->tx_lock);
bdp = fep->dirty_tx;
/* clear status bits for napi*/
(*fep->ops->napi_clear_event)(dev);
while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0 && tx_left) {
dirtyidx = bdp - fep->tx_bd_base;
if (fep->tx_free == fep->tx_ring)
break;
skb = fep->tx_skbuff[dirtyidx];
/* Check for errors. */
if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
if (sc & BD_ENET_TX_HB) /* No heartbeat */
dev->stats.tx_heartbeat_errors++;
if (sc & BD_ENET_TX_LC) /* Late collision */
dev->stats.tx_window_errors++;
if (sc & BD_ENET_TX_RL) /* Retrans limit */
dev->stats.tx_aborted_errors++;
if (sc & BD_ENET_TX_UN) /* Underrun */
dev->stats.tx_fifo_errors++;
if (sc & BD_ENET_TX_CSL) /* Carrier lost */
dev->stats.tx_carrier_errors++;
if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
dev->stats.tx_errors++;
do_restart = 1;
}
} else {
dev->stats.tx_packets++;
}
if (sc & BD_ENET_TX_READY) {
dev_warn(fep->dev,
"HEY! Enet xmit interrupt and TX_READY.\n");
}
/* Deferred means some collisions occurred during transmit,
* but we eventually sent the packet OK.
*/
if (sc & BD_ENET_TX_DEF)
dev->stats.collisions++;
/* unmap */
if (fep->mapped_as_page[dirtyidx])
dma_unmap_page(fep->dev, CBDR_BUFADDR(bdp),
CBDR_DATLEN(bdp), DMA_TO_DEVICE);
else
dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
CBDR_DATLEN(bdp), DMA_TO_DEVICE);
/* Free the sk buffer associated with this last transmit. */
if (skb) {
dev_kfree_skb(skb);
fep->tx_skbuff[dirtyidx] = NULL;
}
/* Update pointer to next buffer descriptor to be transmitted.
*/
if ((sc & BD_ENET_TX_WRAP) == 0)
bdp++;
else
bdp = fep->tx_bd_base;
/* Since we have freed up a buffer, the ring is no longer full.
*/
if (++fep->tx_free == MAX_SKB_FRAGS)
do_wake = 1;
tx_left--;
}
fep->dirty_tx = bdp;
if (do_restart)
(*fep->ops->tx_restart)(dev);
spin_unlock(&fep->tx_lock);
if (do_wake)
netif_wake_queue(dev);
/* First, grab all of the stats for the incoming packet.
* These get messed up if we get called due to a busy condition.
*/
bdp = fep->cur_rx;
while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0 &&
received < budget) {
curidx = bdp - fep->rx_bd_base;
/* Since we have allocated space to hold a complete frame,
* the last indicator should be set.
*/
if ((sc & BD_ENET_RX_LAST) == 0)
dev_warn(fep->dev, "rcv is not +last\n");
/* Check for errors. */
if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
dev->stats.rx_errors++;
/* Frame too long or too short. */
if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
dev->stats.rx_length_errors++;
/* Frame alignment */
if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
dev->stats.rx_frame_errors++;
/* CRC Error */
if (sc & BD_ENET_RX_CR)
dev->stats.rx_crc_errors++;
/* FIFO overrun */
if (sc & BD_ENET_RX_OV)
dev->stats.rx_crc_errors++;
skbn = fep->rx_skbuff[curidx];
} else {
skb = fep->rx_skbuff[curidx];
/* Process the incoming frame */
dev->stats.rx_packets++;
pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
dev->stats.rx_bytes += pkt_len + 4;
if (pkt_len <= fpi->rx_copybreak) {
/* +2 to make IP header L1 cache aligned */
skbn = netdev_alloc_skb(dev, pkt_len + 2);
if (skbn) {
skb_reserve(skbn, 2); /* align IP header */
skb_copy_from_linear_data(skb, skbn->data,
pkt_len);
swap(skb, skbn);
dma_sync_single_for_cpu(fep->dev,
CBDR_BUFADDR(bdp),
L1_CACHE_ALIGN(pkt_len),
DMA_FROM_DEVICE);
}
} else {
skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
if (skbn) {
dma_addr_t dma;
skb_align(skbn, ENET_RX_ALIGN);
dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
DMA_FROM_DEVICE);
dma = dma_map_single(fep->dev, skbn->data,
L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
DMA_FROM_DEVICE);
CBDW_BUFADDR(bdp, dma);
}
}
if (skbn) {
skb_put(skb, pkt_len); /* Make room */
skb->protocol = eth_type_trans(skb, dev);
received++;
netif_receive_skb(skb);
} else {
dev->stats.rx_dropped++;
skbn = skb;
}
}
fep->rx_skbuff[curidx] = skbn;
CBDW_DATLEN(bdp, 0);
CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
/* Update BD pointer to next entry */
if ((sc & BD_ENET_RX_WRAP) == 0)
bdp++;
else
bdp = fep->rx_bd_base;
(*fep->ops->rx_bd_done)(dev);
}
fep->cur_rx = bdp;
if (received < budget && tx_left) {
/* done */
napi_complete_done(napi, received);
(*fep->ops->napi_enable)(dev);
return received;
}
return budget;
}
/* The interrupt handler.
* This is called from the MPC core interrupt.
*/
static irqreturn_t
fs_enet_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
u32 int_events, int_clr_events;
struct fs_enet_private *fep;
int nr, napi_ok, handled;
fep = netdev_priv(dev);
nr = 0;
while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) {
nr++;
int_clr_events = int_events;
int_clr_events &= ~fep->ev_napi;
(*fep->ops->clear_int_events)(dev, int_clr_events);
if (int_events & fep->ev_err)
(*fep->ops->ev_error)(dev, int_events);
if (int_events & fep->ev) {
napi_ok = napi_schedule_prep(&fep->napi);
(*fep->ops->napi_disable)(dev);
(*fep->ops->clear_int_events)(dev, fep->ev_napi);
/* NOTE: it is possible for FCCs in NAPI mode
* to submit a spurious interrupt while in poll
*/
if (napi_ok)
__napi_schedule(&fep->napi);
}
}
handled = nr > 0;
return IRQ_RETVAL(handled);
}
void fs_init_bds(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct sk_buff *skb;
cbd_t __iomem *bdp;
int i;
fs_cleanup_bds(dev);
fep->dirty_tx = fep->tx_bd_base;
fep->cur_tx = fep->tx_bd_base;
fep->tx_free = fep->tx_ring;
fep->cur_rx = fep->rx_bd_base;
/* Initialize the receive buffer descriptors */
for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
skb = netdev_alloc_skb(dev, ENET_RX_FRSIZE);
if (!skb)
break;
skb_align(skb, ENET_RX_ALIGN);
fep->rx_skbuff[i] = skb;
CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skb->data,
L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
DMA_FROM_DEVICE));
CBDW_DATLEN(bdp, 0); /* zero */
CBDW_SC(bdp, BD_ENET_RX_EMPTY |
((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
}
/* if we failed, fillup remainder */
for (; i < fep->rx_ring; i++, bdp++) {
fep->rx_skbuff[i] = NULL;
CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);
}
/* ...and the same for transmit. */
for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
fep->tx_skbuff[i] = NULL;
CBDW_BUFADDR(bdp, 0);
CBDW_DATLEN(bdp, 0);
CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);
}
}
void fs_cleanup_bds(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct sk_buff *skb;
cbd_t __iomem *bdp;
int i;
/* Reset SKB transmit buffers. */
for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
skb = fep->tx_skbuff[i];
if (!skb)
continue;
/* unmap */
dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
skb->len, DMA_TO_DEVICE);
fep->tx_skbuff[i] = NULL;
dev_kfree_skb(skb);
}
/* Reset SKB receive buffers */
for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
skb = fep->rx_skbuff[i];
if (!skb)
continue;
/* unmap */
dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
DMA_FROM_DEVICE);
fep->rx_skbuff[i] = NULL;
dev_kfree_skb(skb);
}
}
#ifdef CONFIG_FS_ENET_MPC5121_FEC
/* MPC5121 FEC requires 4-byte alignment for TX data buffer! */
static struct sk_buff *tx_skb_align_workaround(struct net_device *dev,
struct sk_buff *skb)
{
struct sk_buff *new_skb;
if (skb_linearize(skb))
return NULL;
/* Alloc new skb */
new_skb = netdev_alloc_skb(dev, skb->len + 4);
if (!new_skb)
return NULL;
/* Make sure new skb is properly aligned */
skb_align(new_skb, 4);
/* Copy data to new skb ... */
skb_copy_from_linear_data(skb, new_skb->data, skb->len);
skb_put(new_skb, skb->len);
/* ... and free an old one */
dev_kfree_skb_any(skb);
return new_skb;
}
#endif
static netdev_tx_t
fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
int curidx, nr_frags, len;
cbd_t __iomem *bdp;
skb_frag_t *frag;
u16 sc;
#ifdef CONFIG_FS_ENET_MPC5121_FEC
int i, is_aligned = 1;
if (!IS_ALIGNED((unsigned long)skb->data, 4)) {
is_aligned = 0;
} else {
nr_frags = skb_shinfo(skb)->nr_frags;
frag = skb_shinfo(skb)->frags;
for (i = 0; i < nr_frags; i++, frag++) {
if (!IS_ALIGNED(skb_frag_off(frag), 4)) {
is_aligned = 0;
break;
}
}
}
if (!is_aligned) {
skb = tx_skb_align_workaround(dev, skb);
if (!skb) {
/* We have lost packet due to memory allocation error
* in tx_skb_align_workaround(). Hopefully original
* skb is still valid, so try transmit it later.
*/
return NETDEV_TX_BUSY;
}
}
#endif
spin_lock(&fep->tx_lock);
/* Fill in a Tx ring entry */
bdp = fep->cur_tx;
nr_frags = skb_shinfo(skb)->nr_frags;
if (fep->tx_free <= nr_frags || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
netif_stop_queue(dev);
spin_unlock(&fep->tx_lock);
/* Ooops. All transmit buffers are full. Bail out.
* This should not happen, since the tx queue should be stopped.
*/
dev_warn(fep->dev, "tx queue full!.\n");
return NETDEV_TX_BUSY;
}
curidx = bdp - fep->tx_bd_base;
len = skb->len;
dev->stats.tx_bytes += len;
if (nr_frags)
len -= skb->data_len;
fep->tx_free -= nr_frags + 1;
/* Push the data cache so the CPM does not get stale memory data.
*/
CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
skb->data, len, DMA_TO_DEVICE));
CBDW_DATLEN(bdp, len);
fep->mapped_as_page[curidx] = 0;
frag = skb_shinfo(skb)->frags;
while (nr_frags) {
CBDC_SC(bdp,
BD_ENET_TX_STATS | BD_ENET_TX_INTR | BD_ENET_TX_LAST |
BD_ENET_TX_TC);
CBDS_SC(bdp, BD_ENET_TX_READY);
if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) {
bdp++;
curidx++;
} else {
bdp = fep->tx_bd_base;
curidx = 0;
}
len = skb_frag_size(frag);
CBDW_BUFADDR(bdp, skb_frag_dma_map(fep->dev, frag, 0, len,
DMA_TO_DEVICE));
CBDW_DATLEN(bdp, len);
fep->tx_skbuff[curidx] = NULL;
fep->mapped_as_page[curidx] = 1;
frag++;
nr_frags--;
}
/* Trigger transmission start */
sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |
BD_ENET_TX_LAST | BD_ENET_TX_TC;
/* note that while FEC does not have this bit
* it marks it as available for software use
* yay for hw reuse :)
*/
if (skb->len <= 60)
sc |= BD_ENET_TX_PAD;
CBDC_SC(bdp, BD_ENET_TX_STATS);
CBDS_SC(bdp, sc);
/* Save skb pointer. */
fep->tx_skbuff[curidx] = skb;
/* If this was the last BD in the ring, start at the beginning again. */
if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
bdp++;
else
bdp = fep->tx_bd_base;
fep->cur_tx = bdp;
if (fep->tx_free < MAX_SKB_FRAGS)
netif_stop_queue(dev);
skb_tx_timestamp(skb);
(*fep->ops->tx_kickstart)(dev);
spin_unlock(&fep->tx_lock);
return NETDEV_TX_OK;
}
static void fs_timeout_work(struct work_struct *work)
{
struct fs_enet_private *fep = container_of(work, struct fs_enet_private,
timeout_work);
struct net_device *dev = fep->ndev;
unsigned long flags;
int wake = 0;
dev->stats.tx_errors++;
/* In the event a timeout was detected, but the netdev is brought down
* shortly after, it no longer makes sense to try to recover from the
* timeout. netif_running() will return false when called from the
* .ndo_close() callback. Calling the following recovery code while
* called from .ndo_close() could deadlock on rtnl.
*/
if (!netif_running(dev))
return;
rtnl_lock();
phylink_stop(fep->phylink);
phylink_start(fep->phylink);
rtnl_unlock();
spin_lock_irqsave(&fep->lock, flags);
wake = fep->tx_free >= MAX_SKB_FRAGS &&
!(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
spin_unlock_irqrestore(&fep->lock, flags);
if (wake)
netif_wake_queue(dev);
}
static void fs_timeout(struct net_device *dev, unsigned int txqueue)
{
struct fs_enet_private *fep = netdev_priv(dev);
schedule_work(&fep->timeout_work);
}
static void fs_mac_link_up(struct phylink_config *config,
struct phy_device *phy,
unsigned int mode, phy_interface_t interface,
int speed, int duplex,
bool tx_pause, bool rx_pause)
{
struct net_device *ndev = to_net_dev(config->dev);
struct fs_enet_private *fep = netdev_priv(ndev);
unsigned long flags;
spin_lock_irqsave(&fep->lock, flags);
fep->ops->restart(ndev, interface, speed, duplex);
spin_unlock_irqrestore(&fep->lock, flags);
}
static void fs_mac_link_down(struct phylink_config *config,
unsigned int mode, phy_interface_t interface)
{
struct net_device *ndev = to_net_dev(config->dev);
struct fs_enet_private *fep = netdev_priv(ndev);
unsigned long flags;
spin_lock_irqsave(&fep->lock, flags);
fep->ops->stop(ndev);
spin_unlock_irqrestore(&fep->lock, flags);
}
static void fs_mac_config(struct phylink_config *config, unsigned int mode,
const struct phylink_link_state *state)
{
/* Nothing to do */
}
static int fs_enet_open(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
int r;
int err;
/* to initialize the fep->cur_rx,...
* not doing this, will cause a crash in fs_enet_napi
*/
fs_init_bds(fep->ndev);
napi_enable(&fep->napi);
/* Install our interrupt handler. */
r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED,
"fs_enet-mac", dev);
if (r != 0) {
dev_err(fep->dev, "Could not allocate FS_ENET IRQ!");
napi_disable(&fep->napi);
return -EINVAL;
}
err = phylink_of_phy_connect(fep->phylink, fep->dev->of_node, 0);
if (err) {
free_irq(fep->interrupt, dev);
napi_disable(&fep->napi);
return err;
}
phylink_start(fep->phylink);
netif_start_queue(dev);
return 0;
}
static int fs_enet_close(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
unsigned long flags;
netif_stop_queue(dev);
napi_disable(&fep->napi);
cancel_work(&fep->timeout_work);
phylink_stop(fep->phylink);
spin_lock_irqsave(&fep->lock, flags);
spin_lock(&fep->tx_lock);
(*fep->ops->stop)(dev);
spin_unlock(&fep->tx_lock);
spin_unlock_irqrestore(&fep->lock, flags);
phylink_disconnect_phy(fep->phylink);
/* release any irqs */
free_irq(fep->interrupt, dev);
return 0;
}
static void fs_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
}
static int fs_get_regs_len(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
return (*fep->ops->get_regs_len)(dev);
}
static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
void *p)
{
struct fs_enet_private *fep = netdev_priv(dev);
unsigned long flags;
int r, len;
len = regs->len;
spin_lock_irqsave(&fep->lock, flags);
r = (*fep->ops->get_regs)(dev, p, &len);
spin_unlock_irqrestore(&fep->lock, flags);
if (r == 0)
regs->version = 0;
}
static u32 fs_get_msglevel(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
return fep->msg_enable;
}
static void fs_set_msglevel(struct net_device *dev, u32 value)
{
struct fs_enet_private *fep = netdev_priv(dev);
fep->msg_enable = value;
}
static int fs_get_tunable(struct net_device *dev,
const struct ethtool_tunable *tuna, void *data)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct fs_platform_info *fpi = fep->fpi;
int ret = 0;
switch (tuna->id) {
case ETHTOOL_RX_COPYBREAK:
*(u32 *)data = fpi->rx_copybreak;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int fs_set_tunable(struct net_device *dev,
const struct ethtool_tunable *tuna, const void *data)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct fs_platform_info *fpi = fep->fpi;
int ret = 0;
switch (tuna->id) {
case ETHTOOL_RX_COPYBREAK:
fpi->rx_copybreak = *(u32 *)data;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int fs_ethtool_set_link_ksettings(struct net_device *dev,
const struct ethtool_link_ksettings *cmd)
{
struct fs_enet_private *fep = netdev_priv(dev);
return phylink_ethtool_ksettings_set(fep->phylink, cmd);
}
static int fs_ethtool_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct fs_enet_private *fep = netdev_priv(dev);
return phylink_ethtool_ksettings_get(fep->phylink, cmd);
}
static const struct ethtool_ops fs_ethtool_ops = {
.get_drvinfo = fs_get_drvinfo,
.get_regs_len = fs_get_regs_len,
.nway_reset = phy_ethtool_nway_reset,
.get_link = ethtool_op_get_link,
.get_msglevel = fs_get_msglevel,
.set_msglevel = fs_set_msglevel,
.get_regs = fs_get_regs,
.get_ts_info = ethtool_op_get_ts_info,
.get_link_ksettings = fs_ethtool_get_link_ksettings,
.set_link_ksettings = fs_ethtool_set_link_ksettings,
.get_tunable = fs_get_tunable,
.set_tunable = fs_set_tunable,
};
#ifdef CONFIG_FS_ENET_HAS_FEC
#define IS_FEC(ops) ((ops) == &fs_fec_ops)
#else
#define IS_FEC(ops) 0
#endif
static const struct net_device_ops fs_enet_netdev_ops = {
.ndo_open = fs_enet_open,
.ndo_stop = fs_enet_close,
.ndo_start_xmit = fs_enet_start_xmit,
.ndo_tx_timeout = fs_timeout,
.ndo_set_rx_mode = fs_set_multicast_list,
.ndo_eth_ioctl = fs_eth_ioctl,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = fs_enet_netpoll,
#endif
};
static const struct phylink_mac_ops fs_enet_phylink_mac_ops = {
.mac_config = fs_mac_config,
.mac_link_down = fs_mac_link_down,
.mac_link_up = fs_mac_link_up,
};
static int fs_enet_probe(struct platform_device *ofdev)
{
int privsize, len, ret = -ENODEV;
struct fs_platform_info *fpi;
struct fs_enet_private *fep;
phy_interface_t phy_mode;
const struct fs_ops *ops;
struct net_device *ndev;
struct phylink *phylink;
const u32 *data;
struct clk *clk;
ops = device_get_match_data(&ofdev->dev);
if (!ops)
return -EINVAL;
fpi = kzalloc(sizeof(*fpi), GFP_KERNEL);
if (!fpi)
return -ENOMEM;
if (!IS_FEC(ops)) {
data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len);
if (!data || len != 4)
goto out_free_fpi;
fpi->cp_command = *data;
}
ret = of_get_phy_mode(ofdev->dev.of_node, &phy_mode);
if (ret) {
/* For compatibility, if the mode isn't specified in DT,
* assume MII
*/
phy_mode = PHY_INTERFACE_MODE_MII;
}
fpi->rx_ring = RX_RING_SIZE;
fpi->tx_ring = TX_RING_SIZE;
fpi->rx_copybreak = 240;
fpi->napi_weight = 17;
/* make clock lookup non-fatal (the driver is shared among platforms),
* but require enable to succeed when a clock was specified/found,
* keep a reference to the clock upon successful acquisition
*/
clk = devm_clk_get_optional_enabled(&ofdev->dev, "per");
if (IS_ERR(clk))
goto out_free_fpi;
privsize = sizeof(*fep) +
sizeof(struct sk_buff **) *
(fpi->rx_ring + fpi->tx_ring) +
sizeof(char) * fpi->tx_ring;
ndev = alloc_etherdev(privsize);
if (!ndev) {
ret = -ENOMEM;
goto out_free_fpi;
}
SET_NETDEV_DEV(ndev, &ofdev->dev);
platform_set_drvdata(ofdev, ndev);
fep = netdev_priv(ndev);
fep->dev = &ofdev->dev;
fep->ndev = ndev;
fep->fpi = fpi;
fep->ops = ops;
fep->phylink_config.dev = &ndev->dev;
fep->phylink_config.type = PHYLINK_NETDEV;
fep->phylink_config.mac_capabilities = MAC_10 | MAC_100;
__set_bit(PHY_INTERFACE_MODE_MII,
fep->phylink_config.supported_interfaces);
if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec"))
__set_bit(PHY_INTERFACE_MODE_RMII,
fep->phylink_config.supported_interfaces);
phylink = phylink_create(&fep->phylink_config, dev_fwnode(fep->dev),
phy_mode, &fs_enet_phylink_mac_ops);
if (IS_ERR(phylink)) {
ret = PTR_ERR(phylink);
goto out_free_dev;
}
fep->phylink = phylink;
ret = fep->ops->setup_data(ndev);
if (ret)
goto out_phylink;
fep->rx_skbuff = (struct sk_buff **)&fep[1];
fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
fep->mapped_as_page = (char *)(fep->rx_skbuff + fpi->rx_ring +
fpi->tx_ring);
spin_lock_init(&fep->lock);
spin_lock_init(&fep->tx_lock);
of_get_ethdev_address(ofdev->dev.of_node, ndev);
ret = fep->ops->allocate_bd(ndev);
if (ret)
goto out_cleanup_data;
fep->rx_bd_base = fep->ring_base;
fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
fep->tx_ring = fpi->tx_ring;
fep->rx_ring = fpi->rx_ring;
ndev->netdev_ops = &fs_enet_netdev_ops;
ndev->watchdog_timeo = 2 * HZ;
INIT_WORK(&fep->timeout_work, fs_timeout_work);
netif_napi_add_weight(ndev, &fep->napi, fs_enet_napi,
fpi->napi_weight);
ndev->ethtool_ops = &fs_ethtool_ops;
ndev->features |= NETIF_F_SG;
ret = register_netdev(ndev);
if (ret)
goto out_free_bd;
pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr);
return 0;
out_free_bd:
fep->ops->free_bd(ndev);
out_cleanup_data:
fep->ops->cleanup_data(ndev);
out_phylink:
phylink_destroy(fep->phylink);
out_free_dev:
free_netdev(ndev);
out_free_fpi:
kfree(fpi);
return ret;
}
static void fs_enet_remove(struct platform_device *ofdev)
{
struct net_device *ndev = platform_get_drvdata(ofdev);
struct fs_enet_private *fep = netdev_priv(ndev);
unregister_netdev(ndev);
fep->ops->free_bd(ndev);
fep->ops->cleanup_data(ndev);
dev_set_drvdata(fep->dev, NULL);
phylink_destroy(fep->phylink);
free_netdev(ndev);
}
static const struct of_device_id fs_enet_match[] = {
#ifdef CONFIG_FS_ENET_HAS_SCC
{
.compatible = "fsl,cpm1-scc-enet",
.data = (void *)&fs_scc_ops,
},
{
.compatible = "fsl,cpm2-scc-enet",
.data = (void *)&fs_scc_ops,
},
#endif
#ifdef CONFIG_FS_ENET_HAS_FCC
{
.compatible = "fsl,cpm2-fcc-enet",
.data = (void *)&fs_fcc_ops,
},
#endif
#ifdef CONFIG_FS_ENET_HAS_FEC
#ifdef CONFIG_FS_ENET_MPC5121_FEC
{
.compatible = "fsl,mpc5121-fec",
.data = (void *)&fs_fec_ops,
},
{
.compatible = "fsl,mpc5125-fec",
.data = (void *)&fs_fec_ops,
},
#else
{
.compatible = "fsl,pq1-fec-enet",
.data = (void *)&fs_fec_ops,
},
#endif
#endif
{}
};
MODULE_DEVICE_TABLE(of, fs_enet_match);
static struct platform_driver fs_enet_driver = {
.driver = {
.name = "fs_enet",
.of_match_table = fs_enet_match,
},
.probe = fs_enet_probe,
.remove_new = fs_enet_remove,
};
#ifdef CONFIG_NET_POLL_CONTROLLER
static void fs_enet_netpoll(struct net_device *dev)
{
disable_irq(dev->irq);
fs_enet_interrupt(dev->irq, dev);
enable_irq(dev->irq);
}
#endif
module_platform_driver(fs_enet_driver);
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