drivers/net/ethernet/socionext/sni_ave.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/socionext/sni_ave.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/socionext/sni_ave.c
Extension
.c
Size
49713 bytes
Lines
1985
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

static const struct net_device_ops ave_netdev_ops = {
	.ndo_init		= ave_init,
	.ndo_uninit		= ave_uninit,
	.ndo_open		= ave_open,
	.ndo_stop		= ave_stop,
	.ndo_start_xmit		= ave_start_xmit,
	.ndo_eth_ioctl		= ave_ioctl,
	.ndo_set_rx_mode	= ave_set_rx_mode,
	.ndo_get_stats64	= ave_get_stats64,
	.ndo_set_mac_address	= ave_set_mac_address,
};

static int ave_probe(struct platform_device *pdev)
{
	const struct ave_soc_data *data;
	struct device *dev = &pdev->dev;
	char buf[ETHTOOL_FWVERS_LEN];
	struct of_phandle_args args;
	phy_interface_t phy_mode;
	struct ave_private *priv;
	struct net_device *ndev;
	struct device_node *np;
	void __iomem *base;
	const char *name;
	int i, irq, ret;
	u64 dma_mask;
	u32 ave_id;

	data = of_device_get_match_data(dev);
	if (WARN_ON(!data))
		return -EINVAL;

	np = dev->of_node;
	ret = of_get_phy_mode(np, &phy_mode);
	if (ret) {
		dev_err(dev, "phy-mode not found\n");
		return ret;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		return irq;

	base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(base))
		return PTR_ERR(base);

	ndev = devm_alloc_etherdev(dev, sizeof(struct ave_private));
	if (!ndev) {
		dev_err(dev, "can't allocate ethernet device\n");
		return -ENOMEM;
	}

	ndev->netdev_ops = &ave_netdev_ops;
	ndev->ethtool_ops = &ave_ethtool_ops;
	SET_NETDEV_DEV(ndev, dev);

	ndev->features    |= (NETIF_F_IP_CSUM | NETIF_F_RXCSUM);
	ndev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_RXCSUM);

	ndev->max_mtu = AVE_MAX_ETHFRAME - (ETH_HLEN + ETH_FCS_LEN);

	ret = of_get_ethdev_address(np, ndev);
	if (ret) {
		/* if the mac address is invalid, use random mac address */
		eth_hw_addr_random(ndev);
		dev_warn(dev, "Using random MAC address: %pM\n",
			 ndev->dev_addr);
	}

	priv = netdev_priv(ndev);
	priv->base = base;
	priv->irq = irq;
	priv->ndev = ndev;
	priv->msg_enable = netif_msg_init(-1, AVE_DEFAULT_MSG_ENABLE);
	priv->phy_mode = phy_mode;
	priv->data = data;

	if (IS_DESC_64BIT(priv)) {
		priv->desc_size = AVE_DESC_SIZE_64;
		priv->tx.daddr  = AVE_TXDM_64;
		priv->rx.daddr  = AVE_RXDM_64;
		dma_mask = DMA_BIT_MASK(64);
	} else {
		priv->desc_size = AVE_DESC_SIZE_32;
		priv->tx.daddr  = AVE_TXDM_32;
		priv->rx.daddr  = AVE_RXDM_32;
		dma_mask = DMA_BIT_MASK(32);
	}
	ret = dma_set_mask(dev, dma_mask);

Annotation

Implementation Notes