linux_dsm_epyc7002/drivers/net/ethernet/lantiq_etop.c

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/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
* Copyright (C) 2011 John Crispin <blogic@openwrt.org>
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/uaccess.h>
#include <linux/in.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/phy.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/skbuff.h>
#include <linux/mm.h>
#include <linux/platform_device.h>
#include <linux/ethtool.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <asm/checksum.h>
#include <lantiq_soc.h>
#include <xway_dma.h>
#include <lantiq_platform.h>
#define LTQ_ETOP_MDIO 0x11804
#define MDIO_REQUEST 0x80000000
#define MDIO_READ 0x40000000
#define MDIO_ADDR_MASK 0x1f
#define MDIO_ADDR_OFFSET 0x15
#define MDIO_REG_MASK 0x1f
#define MDIO_REG_OFFSET 0x10
#define MDIO_VAL_MASK 0xffff
#define PPE32_CGEN 0x800
#define LQ_PPE32_ENET_MAC_CFG 0x1840
#define LTQ_ETOP_ENETS0 0x11850
#define LTQ_ETOP_MAC_DA0 0x1186C
#define LTQ_ETOP_MAC_DA1 0x11870
#define LTQ_ETOP_CFG 0x16020
#define LTQ_ETOP_IGPLEN 0x16080
#define MAX_DMA_CHAN 0x8
#define MAX_DMA_CRC_LEN 0x4
#define MAX_DMA_DATA_LEN 0x600
#define ETOP_FTCU BIT(28)
#define ETOP_MII_MASK 0xf
#define ETOP_MII_NORMAL 0xd
#define ETOP_MII_REVERSE 0xe
#define ETOP_PLEN_UNDER 0x40
#define ETOP_CGEN 0x800
/* use 2 static channels for TX/RX */
#define LTQ_ETOP_TX_CHANNEL 1
#define LTQ_ETOP_RX_CHANNEL 6
#define IS_TX(x) (x == LTQ_ETOP_TX_CHANNEL)
#define IS_RX(x) (x == LTQ_ETOP_RX_CHANNEL)
#define ltq_etop_r32(x) ltq_r32(ltq_etop_membase + (x))
#define ltq_etop_w32(x, y) ltq_w32(x, ltq_etop_membase + (y))
#define ltq_etop_w32_mask(x, y, z) \
ltq_w32_mask(x, y, ltq_etop_membase + (z))
#define DRV_VERSION "1.0"
static void __iomem *ltq_etop_membase;
struct ltq_etop_chan {
int idx;
int tx_free;
struct net_device *netdev;
struct napi_struct napi;
struct ltq_dma_channel dma;
struct sk_buff *skb[LTQ_DESC_NUM];
};
struct ltq_etop_priv {
struct net_device *netdev;
struct platform_device *pdev;
struct ltq_eth_data *pldata;
struct resource *res;
struct mii_bus *mii_bus;
struct ltq_etop_chan ch[MAX_DMA_CHAN];
int tx_free[MAX_DMA_CHAN >> 1];
spinlock_t lock;
};
static int
ltq_etop_alloc_skb(struct ltq_etop_chan *ch)
{
ch->skb[ch->dma.desc] = netdev_alloc_skb(ch->netdev, MAX_DMA_DATA_LEN);
if (!ch->skb[ch->dma.desc])
return -ENOMEM;
ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(NULL,
ch->skb[ch->dma.desc]->data, MAX_DMA_DATA_LEN,
DMA_FROM_DEVICE);
ch->dma.desc_base[ch->dma.desc].addr =
CPHYSADDR(ch->skb[ch->dma.desc]->data);
ch->dma.desc_base[ch->dma.desc].ctl =
LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) |
MAX_DMA_DATA_LEN;
skb_reserve(ch->skb[ch->dma.desc], NET_IP_ALIGN);
return 0;
}
static void
ltq_etop_hw_receive(struct ltq_etop_chan *ch)
{
struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
struct sk_buff *skb = ch->skb[ch->dma.desc];
int len = (desc->ctl & LTQ_DMA_SIZE_MASK) - MAX_DMA_CRC_LEN;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
if (ltq_etop_alloc_skb(ch)) {
netdev_err(ch->netdev,
"failed to allocate new rx buffer, stopping DMA\n");
ltq_dma_close(&ch->dma);
}
ch->dma.desc++;
ch->dma.desc %= LTQ_DESC_NUM;
spin_unlock_irqrestore(&priv->lock, flags);
skb_put(skb, len);
skb->protocol = eth_type_trans(skb, ch->netdev);
netif_receive_skb(skb);
}
static int
ltq_etop_poll_rx(struct napi_struct *napi, int budget)
{
struct ltq_etop_chan *ch = container_of(napi,
struct ltq_etop_chan, napi);
int rx = 0;
int complete = 0;
while ((rx < budget) && !complete) {
struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) {
ltq_etop_hw_receive(ch);
rx++;
} else {
complete = 1;
}
}
if (complete || !rx) {
napi_complete(&ch->napi);
ltq_dma_ack_irq(&ch->dma);
}
return rx;
}
static int
ltq_etop_poll_tx(struct napi_struct *napi, int budget)
{
struct ltq_etop_chan *ch =
container_of(napi, struct ltq_etop_chan, napi);
struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
struct netdev_queue *txq =
netdev_get_tx_queue(ch->netdev, ch->idx >> 1);
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
while ((ch->dma.desc_base[ch->tx_free].ctl &
(LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) {
dev_kfree_skb_any(ch->skb[ch->tx_free]);
ch->skb[ch->tx_free] = NULL;
memset(&ch->dma.desc_base[ch->tx_free], 0,
sizeof(struct ltq_dma_desc));
ch->tx_free++;
ch->tx_free %= LTQ_DESC_NUM;
}
spin_unlock_irqrestore(&priv->lock, flags);
if (netif_tx_queue_stopped(txq))
netif_tx_start_queue(txq);
napi_complete(&ch->napi);
ltq_dma_ack_irq(&ch->dma);
return 1;
}
static irqreturn_t
ltq_etop_dma_irq(int irq, void *_priv)
{
struct ltq_etop_priv *priv = _priv;
int ch = irq - LTQ_DMA_CH0_INT;
napi_schedule(&priv->ch[ch].napi);
return IRQ_HANDLED;
}
static void
ltq_etop_free_channel(struct net_device *dev, struct ltq_etop_chan *ch)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
ltq_dma_free(&ch->dma);
if (ch->dma.irq)
free_irq(ch->dma.irq, priv);
if (IS_RX(ch->idx)) {
int desc;
for (desc = 0; desc < LTQ_DESC_NUM; desc++)
dev_kfree_skb_any(ch->skb[ch->dma.desc]);
}
}
static void
ltq_etop_hw_exit(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
int i;
ltq_pmu_disable(PMU_PPE);
for (i = 0; i < MAX_DMA_CHAN; i++)
if (IS_TX(i) || IS_RX(i))
ltq_etop_free_channel(dev, &priv->ch[i]);
}
static int
ltq_etop_hw_init(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
int i;
ltq_pmu_enable(PMU_PPE);
switch (priv->pldata->mii_mode) {
case PHY_INTERFACE_MODE_RMII:
ltq_etop_w32_mask(ETOP_MII_MASK,
ETOP_MII_REVERSE, LTQ_ETOP_CFG);
break;
case PHY_INTERFACE_MODE_MII:
ltq_etop_w32_mask(ETOP_MII_MASK,
ETOP_MII_NORMAL, LTQ_ETOP_CFG);
break;
default:
netdev_err(dev, "unknown mii mode %d\n",
priv->pldata->mii_mode);
return -ENOTSUPP;
}
/* enable crc generation */
ltq_etop_w32(PPE32_CGEN, LQ_PPE32_ENET_MAC_CFG);
ltq_dma_init_port(DMA_PORT_ETOP);
for (i = 0; i < MAX_DMA_CHAN; i++) {
int irq = LTQ_DMA_CH0_INT + i;
struct ltq_etop_chan *ch = &priv->ch[i];
ch->idx = ch->dma.nr = i;
if (IS_TX(i)) {
ltq_dma_alloc_tx(&ch->dma);
request_irq(irq, ltq_etop_dma_irq, 0, "etop_tx", priv);
} else if (IS_RX(i)) {
ltq_dma_alloc_rx(&ch->dma);
for (ch->dma.desc = 0; ch->dma.desc < LTQ_DESC_NUM;
ch->dma.desc++)
if (ltq_etop_alloc_skb(ch))
return -ENOMEM;
ch->dma.desc = 0;
request_irq(irq, ltq_etop_dma_irq, 0, "etop_rx", priv);
}
ch->dma.irq = irq;
}
return 0;
}
static void
ltq_etop_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
strlcpy(info->driver, "Lantiq ETOP", sizeof(info->driver));
strlcpy(info->bus_info, "internal", sizeof(info->bus_info));
strlcpy(info->version, DRV_VERSION, sizeof(info->version));
}
static int
ltq_etop_nway_reset(struct net_device *dev)
{
return phy_start_aneg(dev->phydev);
}
static const struct ethtool_ops ltq_etop_ethtool_ops = {
.get_drvinfo = ltq_etop_get_drvinfo,
.nway_reset = ltq_etop_nway_reset,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
};
static int
ltq_etop_mdio_wr(struct mii_bus *bus, int phy_addr, int phy_reg, u16 phy_data)
{
u32 val = MDIO_REQUEST |
((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) |
((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET) |
phy_data;
while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
;
ltq_etop_w32(val, LTQ_ETOP_MDIO);
return 0;
}
static int
ltq_etop_mdio_rd(struct mii_bus *bus, int phy_addr, int phy_reg)
{
u32 val = MDIO_REQUEST | MDIO_READ |
((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) |
((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET);
while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
;
ltq_etop_w32(val, LTQ_ETOP_MDIO);
while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
;
val = ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_VAL_MASK;
return val;
}
static void
ltq_etop_mdio_link(struct net_device *dev)
{
/* nothing to do */
}
static int
ltq_etop_mdio_probe(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
struct phy_device *phydev;
phydev = phy_find_first(priv->mii_bus);
if (!phydev) {
netdev_err(dev, "no PHY found\n");
return -ENODEV;
}
phydev = phy_connect(dev, phydev_name(phydev),
&ltq_etop_mdio_link, priv->pldata->mii_mode);
if (IS_ERR(phydev)) {
netdev_err(dev, "Could not attach to PHY\n");
return PTR_ERR(phydev);
}
phydev->supported &= (SUPPORTED_10baseT_Half
| SUPPORTED_10baseT_Full
| SUPPORTED_100baseT_Half
| SUPPORTED_100baseT_Full
| SUPPORTED_Autoneg
| SUPPORTED_MII
| SUPPORTED_TP);
phydev->advertising = phydev->supported;
phy_attached_info(phydev);
return 0;
}
static int
ltq_etop_mdio_init(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
int err;
priv->mii_bus = mdiobus_alloc();
if (!priv->mii_bus) {
netdev_err(dev, "failed to allocate mii bus\n");
err = -ENOMEM;
goto err_out;
}
priv->mii_bus->priv = dev;
priv->mii_bus->read = ltq_etop_mdio_rd;
priv->mii_bus->write = ltq_etop_mdio_wr;
priv->mii_bus->name = "ltq_mii";
snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
priv->pdev->name, priv->pdev->id);
if (mdiobus_register(priv->mii_bus)) {
err = -ENXIO;
goto err_out_free_mdiobus;
}
if (ltq_etop_mdio_probe(dev)) {
err = -ENXIO;
goto err_out_unregister_bus;
}
return 0;
err_out_unregister_bus:
mdiobus_unregister(priv->mii_bus);
err_out_free_mdiobus:
mdiobus_free(priv->mii_bus);
err_out:
return err;
}
static void
ltq_etop_mdio_cleanup(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
phy_disconnect(dev->phydev);
mdiobus_unregister(priv->mii_bus);
mdiobus_free(priv->mii_bus);
}
static int
ltq_etop_open(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
int i;
for (i = 0; i < MAX_DMA_CHAN; i++) {
struct ltq_etop_chan *ch = &priv->ch[i];
if (!IS_TX(i) && (!IS_RX(i)))
continue;
ltq_dma_open(&ch->dma);
napi_enable(&ch->napi);
}
phy_start(dev->phydev);
netif_tx_start_all_queues(dev);
return 0;
}
static int
ltq_etop_stop(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
int i;
netif_tx_stop_all_queues(dev);
phy_stop(dev->phydev);
for (i = 0; i < MAX_DMA_CHAN; i++) {
struct ltq_etop_chan *ch = &priv->ch[i];
if (!IS_RX(i) && !IS_TX(i))
continue;
napi_disable(&ch->napi);
ltq_dma_close(&ch->dma);
}
return 0;
}
static int
ltq_etop_tx(struct sk_buff *skb, struct net_device *dev)
{
int queue = skb_get_queue_mapping(skb);
struct netdev_queue *txq = netdev_get_tx_queue(dev, queue);
struct ltq_etop_priv *priv = netdev_priv(dev);
struct ltq_etop_chan *ch = &priv->ch[(queue << 1) | 1];
struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
int len;
unsigned long flags;
u32 byte_offset;
len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) || ch->skb[ch->dma.desc]) {
dev_kfree_skb_any(skb);
netdev_err(dev, "tx ring full\n");
netif_tx_stop_queue(txq);
return NETDEV_TX_BUSY;
}
/* dma needs to start on a 16 byte aligned address */
byte_offset = CPHYSADDR(skb->data) % 16;
ch->skb[ch->dma.desc] = skb;
netif_trans_update(dev);
spin_lock_irqsave(&priv->lock, flags);
desc->addr = ((unsigned int) dma_map_single(NULL, skb->data, len,
DMA_TO_DEVICE)) - byte_offset;
wmb();
desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP |
LTQ_DMA_TX_OFFSET(byte_offset) | (len & LTQ_DMA_SIZE_MASK);
ch->dma.desc++;
ch->dma.desc %= LTQ_DESC_NUM;
spin_unlock_irqrestore(&priv->lock, flags);
if (ch->dma.desc_base[ch->dma.desc].ctl & LTQ_DMA_OWN)
netif_tx_stop_queue(txq);
return NETDEV_TX_OK;
}
static int
ltq_etop_change_mtu(struct net_device *dev, int new_mtu)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
unsigned long flags;
dev->mtu = new_mtu;
spin_lock_irqsave(&priv->lock, flags);
ltq_etop_w32((ETOP_PLEN_UNDER << 16) | new_mtu, LTQ_ETOP_IGPLEN);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int
ltq_etop_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
/* TODO: mii-toll reports "No MII transceiver present!." ?!*/
return phy_mii_ioctl(dev->phydev, rq, cmd);
}
static int
ltq_etop_set_mac_address(struct net_device *dev, void *p)
{
int ret = eth_mac_addr(dev, p);
if (!ret) {
struct ltq_etop_priv *priv = netdev_priv(dev);
unsigned long flags;
/* store the mac for the unicast filter */
spin_lock_irqsave(&priv->lock, flags);
ltq_etop_w32(*((u32 *)dev->dev_addr), LTQ_ETOP_MAC_DA0);
ltq_etop_w32(*((u16 *)&dev->dev_addr[4]) << 16,
LTQ_ETOP_MAC_DA1);
spin_unlock_irqrestore(&priv->lock, flags);
}
return ret;
}
static void
ltq_etop_set_multicast_list(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
unsigned long flags;
/* ensure that the unicast filter is not enabled in promiscious mode */
spin_lock_irqsave(&priv->lock, flags);
if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI))
ltq_etop_w32_mask(ETOP_FTCU, 0, LTQ_ETOP_ENETS0);
else
ltq_etop_w32_mask(0, ETOP_FTCU, LTQ_ETOP_ENETS0);
spin_unlock_irqrestore(&priv->lock, flags);
}
static u16
net: core: explicitly select a txq before doing l2 forwarding Currently, the tx queue were selected implicitly in ndo_dfwd_start_xmit(). The will cause several issues: - NETIF_F_LLTX were removed for macvlan, so txq lock were done for macvlan instead of lower device which misses the necessary txq synchronization for lower device such as txq stopping or frozen required by dev watchdog or control path. - dev_hard_start_xmit() was called with NULL txq which bypasses the net device watchdog. - dev_hard_start_xmit() does not check txq everywhere which will lead a crash when tso is disabled for lower device. Fix this by explicitly introducing a new param for .ndo_select_queue() for just selecting queues in the case of l2 forwarding offload. netdev_pick_tx() was also extended to accept this parameter and dev_queue_xmit_accel() was used to do l2 forwarding transmission. With this fixes, NETIF_F_LLTX could be preserved for macvlan and there's no need to check txq against NULL in dev_hard_start_xmit(). Also there's no need to keep a dedicated ndo_dfwd_start_xmit() and we can just reuse the code of dev_queue_xmit() to do the transmission. In the future, it was also required for macvtap l2 forwarding support since it provides a necessary synchronization method. Cc: John Fastabend <john.r.fastabend@intel.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: e1000-devel@lists.sourceforge.net Signed-off-by: Jason Wang <jasowang@redhat.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-10 15:18:26 +07:00
ltq_etop_select_queue(struct net_device *dev, struct sk_buff *skb,
void *accel_priv, select_queue_fallback_t fallback)
{
/* we are currently only using the first queue */
return 0;
}
static int
ltq_etop_init(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
struct sockaddr mac;
int err;
bool random_mac = false;
dev->watchdog_timeo = 10 * HZ;
err = ltq_etop_hw_init(dev);
if (err)
goto err_hw;
ltq_etop_change_mtu(dev, 1500);
memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr));
if (!is_valid_ether_addr(mac.sa_data)) {
pr_warn("etop: invalid MAC, using random\n");
eth_random_addr(mac.sa_data);
random_mac = true;
}
err = ltq_etop_set_mac_address(dev, &mac);
if (err)
goto err_netdev;
/* Set addr_assign_type here, ltq_etop_set_mac_address would reset it. */
if (random_mac)
dev->addr_assign_type = NET_ADDR_RANDOM;
ltq_etop_set_multicast_list(dev);
err = ltq_etop_mdio_init(dev);
if (err)
goto err_netdev;
return 0;
err_netdev:
unregister_netdev(dev);
free_netdev(dev);
err_hw:
ltq_etop_hw_exit(dev);
return err;
}
static void
ltq_etop_tx_timeout(struct net_device *dev)
{
int err;
ltq_etop_hw_exit(dev);
err = ltq_etop_hw_init(dev);
if (err)
goto err_hw;
netif_trans_update(dev);
netif_wake_queue(dev);
return;
err_hw:
ltq_etop_hw_exit(dev);
netdev_err(dev, "failed to restart etop after TX timeout\n");
}
static const struct net_device_ops ltq_eth_netdev_ops = {
.ndo_open = ltq_etop_open,
.ndo_stop = ltq_etop_stop,
.ndo_start_xmit = ltq_etop_tx,
.ndo_change_mtu = ltq_etop_change_mtu,
.ndo_do_ioctl = ltq_etop_ioctl,
.ndo_set_mac_address = ltq_etop_set_mac_address,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_rx_mode = ltq_etop_set_multicast_list,
.ndo_select_queue = ltq_etop_select_queue,
.ndo_init = ltq_etop_init,
.ndo_tx_timeout = ltq_etop_tx_timeout,
};
static int __init
ltq_etop_probe(struct platform_device *pdev)
{
struct net_device *dev;
struct ltq_etop_priv *priv;
struct resource *res;
int err;
int i;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "failed to get etop resource\n");
err = -ENOENT;
goto err_out;
}
res = devm_request_mem_region(&pdev->dev, res->start,
resource_size(res), dev_name(&pdev->dev));
if (!res) {
dev_err(&pdev->dev, "failed to request etop resource\n");
err = -EBUSY;
goto err_out;
}
ltq_etop_membase = devm_ioremap_nocache(&pdev->dev,
res->start, resource_size(res));
if (!ltq_etop_membase) {
dev_err(&pdev->dev, "failed to remap etop engine %d\n",
pdev->id);
err = -ENOMEM;
goto err_out;
}
dev = alloc_etherdev_mq(sizeof(struct ltq_etop_priv), 4);
if (!dev) {
err = -ENOMEM;
goto err_out;
}
strcpy(dev->name, "eth%d");
dev->netdev_ops = &ltq_eth_netdev_ops;
dev->ethtool_ops = &ltq_etop_ethtool_ops;
priv = netdev_priv(dev);
priv->res = res;
priv->pdev = pdev;
priv->pldata = dev_get_platdata(&pdev->dev);
priv->netdev = dev;
spin_lock_init(&priv->lock);
for (i = 0; i < MAX_DMA_CHAN; i++) {
if (IS_TX(i))
netif_napi_add(dev, &priv->ch[i].napi,
ltq_etop_poll_tx, 8);
else if (IS_RX(i))
netif_napi_add(dev, &priv->ch[i].napi,
ltq_etop_poll_rx, 32);
priv->ch[i].netdev = dev;
}
err = register_netdev(dev);
if (err)
goto err_free;
platform_set_drvdata(pdev, dev);
return 0;
err_free:
free_netdev(dev);
err_out:
return err;
}
static int
ltq_etop_remove(struct platform_device *pdev)
{
struct net_device *dev = platform_get_drvdata(pdev);
if (dev) {
netif_tx_stop_all_queues(dev);
ltq_etop_hw_exit(dev);
ltq_etop_mdio_cleanup(dev);
unregister_netdev(dev);
}
return 0;
}
static struct platform_driver ltq_mii_driver = {
.remove = ltq_etop_remove,
.driver = {
.name = "ltq_etop",
},
};
int __init
init_ltq_etop(void)
{
int ret = platform_driver_probe(&ltq_mii_driver, ltq_etop_probe);
if (ret)
pr_err("ltq_etop: Error registering platform driver!");
return ret;
}
static void __exit
exit_ltq_etop(void)
{
platform_driver_unregister(&ltq_mii_driver);
}
module_init(init_ltq_etop);
module_exit(exit_ltq_etop);
MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
MODULE_DESCRIPTION("Lantiq SoC ETOP");
MODULE_LICENSE("GPL");