/******************************************************************************
* struct net_device_ops functions
*****************************************************************************/
static int ftmac100_open(struct net_device *netdev)
{
struct ftmac100 *priv = netdev_priv(netdev);
int err;
err = ftmac100_alloc_buffers(priv);
if (err) {
netdev_err(netdev, "failed to allocate buffers\n");
goto err_alloc;
}
err = request_irq(priv->irq, ftmac100_interrupt, 0, netdev->name, netdev);
if (err) {
netdev_err(netdev, "failed to request irq %d\n", priv->irq);
goto err_irq;
}
priv->rx_pointer = 0;
priv->tx_clean_pointer = 0;
priv->tx_pointer = 0;
priv->tx_pending = 0;
err = ftmac100_start_hw(priv);
if (err)
goto err_hw;
napi_enable(&priv->napi);
netif_start_queue(netdev);
ftmac100_enable_all_int(priv);
return 0;
err_hw:
free_irq(priv->irq, netdev);
err_irq:
ftmac100_free_buffers(priv);
err_alloc:
return err;
}
/******************************************************************************
* struct napi_struct functions
*****************************************************************************/
static int ftmac100_poll(struct napi_struct *napi, int budget)
{
struct ftmac100 *priv = container_of(napi, struct ftmac100, napi);
struct net_device *netdev = priv->netdev;
unsigned int status;
bool completed = true;
int rx = 0;
status = ioread32(priv->base + FTMAC100_OFFSET_ISR);
if (status & (FTMAC100_INT_RPKT_FINISH | FTMAC100_INT_NORXBUF)) {
/*
* FTMAC100_INT_RPKT_FINISH:
* RX DMA has received packets into RX buffer successfully
*
* FTMAC100_INT_NORXBUF:
* RX buffer unavailable
*/
bool retry;
do {
retry = ftmac100_rx_packet(priv, &rx);
} while (retry && rx < budget);
if (retry && rx == budget)
completed = false;
}
if (status & (FTMAC100_INT_XPKT_OK | FTMAC100_INT_XPKT_LOST)) {
/*
* FTMAC100_INT_XPKT_OK:
* packet transmitted to ethernet successfully
*
* FTMAC100_INT_XPKT_LOST:
* packet transmitted to ethernet lost due to late
* collision or excessive collision
*/
ftmac100_tx_complete(priv);
}
if (status & (FTMAC100_INT_NORXBUF | FTMAC100_INT_RPKT_LOST |
FTMAC100_INT_AHB_ERR | FTMAC100_INT_PHYSTS_CHG)) {
if (net_ratelimit())
netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
status & FTMAC100_INT_NORXBUF ? "NORXBUF " : "",
status & FTMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
status & FTMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
status & FTMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
if (status & FTMAC100_INT_NORXBUF) {
/* RX buffer unavailable */
netdev->stats.rx_over_errors++;
}
if (status & FTMAC100_INT_RPKT_LOST) {
/* received packet lost due to RX FIFO full */
netdev->stats.rx_fifo_errors++;
}
if (status & FTMAC100_INT_PHYSTS_CHG) {
/* PHY link status change */
mii_check_link(&priv->mii);
}
}
if (completed) {
/* stop polling */
napi_complete(napi);
ftmac100_enable_all_int(priv);
}
return rx;
}
static int ftmac100_poll(struct napi_struct *napi, int budget)
{
struct ftmac100 *priv = container_of(napi, struct ftmac100, napi);
struct net_device *netdev = priv->netdev;
unsigned int status;
bool completed = true;
int rx = 0;
status = ioread32(priv->base + FTMAC100_OFFSET_ISR);
if (status & (FTMAC100_INT_RPKT_FINISH | FTMAC100_INT_NORXBUF)) {
/*
*/
bool retry;
do {
retry = ftmac100_rx_packet(priv, &rx);
} while (retry && rx < budget);
if (retry && rx == budget)
completed = false;
}
if (status & (FTMAC100_INT_XPKT_OK | FTMAC100_INT_XPKT_LOST)) {
/*
*/
ftmac100_tx_complete(priv);
}
if (status & (FTMAC100_INT_NORXBUF | FTMAC100_INT_RPKT_LOST |
FTMAC100_INT_AHB_ERR | FTMAC100_INT_PHYSTS_CHG)) {
if (net_ratelimit())
netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
status & FTMAC100_INT_NORXBUF ? "NORXBUF " : "",
status & FTMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
status & FTMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
status & FTMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
if (status & FTMAC100_INT_NORXBUF) {
/* */
netdev->stats.rx_over_errors++;
}
if (status & FTMAC100_INT_RPKT_LOST) {
/* */
netdev->stats.rx_fifo_errors++;
}
if (status & FTMAC100_INT_PHYSTS_CHG) {
/* */
mii_check_link(&priv->mii);
}
}
if (completed) {
/* */
napi_complete(napi);
ftmac100_enable_all_int(priv);
}
return rx;
}
