/****************************************************************************** * 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; }