drivers/net/ethernet/amd/au1000_eth.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/amd/au1000_eth.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/amd/au1000_eth.c
Extension
.c
Size
35163 bytes
Lines
1375
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 au1000_netdev_ops = {
	.ndo_open		= au1000_open,
	.ndo_stop		= au1000_close,
	.ndo_start_xmit		= au1000_tx,
	.ndo_set_rx_mode	= au1000_multicast_list,
	.ndo_eth_ioctl		= phy_do_ioctl_running,
	.ndo_tx_timeout		= au1000_tx_timeout,
	.ndo_set_mac_address	= eth_mac_addr,
	.ndo_validate_addr	= eth_validate_addr,
};

static int au1000_probe(struct platform_device *pdev)
{
	struct au1000_private *aup = NULL;
	struct au1000_eth_platform_data *pd;
	struct net_device *dev = NULL;
	struct db_dest *pDB, *pDBfree;
	int irq, i, err = 0;
	struct resource *base, *macen, *macdma;

	base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!base) {
		dev_err(&pdev->dev, "failed to retrieve base register\n");
		err = -ENODEV;
		goto out;
	}

	macen = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (!macen) {
		dev_err(&pdev->dev, "failed to retrieve MAC Enable register\n");
		err = -ENODEV;
		goto out;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		err = -ENODEV;
		goto out;
	}

	macdma = platform_get_resource(pdev, IORESOURCE_MEM, 2);
	if (!macdma) {
		dev_err(&pdev->dev, "failed to retrieve MACDMA registers\n");
		err = -ENODEV;
		goto out;
	}

	if (!request_mem_region(base->start, resource_size(base),
							pdev->name)) {
		dev_err(&pdev->dev, "failed to request memory region for base registers\n");
		err = -ENXIO;
		goto out;
	}

	if (!request_mem_region(macen->start, resource_size(macen),
							pdev->name)) {
		dev_err(&pdev->dev, "failed to request memory region for MAC enable register\n");
		err = -ENXIO;
		goto err_request;
	}

	if (!request_mem_region(macdma->start, resource_size(macdma),
							pdev->name)) {
		dev_err(&pdev->dev, "failed to request MACDMA memory region\n");
		err = -ENXIO;
		goto err_macdma;
	}

	dev = alloc_etherdev(sizeof(struct au1000_private));
	if (!dev) {
		err = -ENOMEM;
		goto err_alloc;
	}

	SET_NETDEV_DEV(dev, &pdev->dev);
	platform_set_drvdata(pdev, dev);
	aup = netdev_priv(dev);

	spin_lock_init(&aup->lock);
	aup->msg_enable = (au1000_debug < 4 ?
				AU1000_DEF_MSG_ENABLE : au1000_debug);

	/* Allocate the data buffers
	 * Snooping works fine with eth on all au1xxx
	 */
	aup->vaddr = dma_alloc_coherent(&pdev->dev, MAX_BUF_SIZE *
					(NUM_TX_BUFFS + NUM_RX_BUFFS),
					&aup->dma_addr, 0);
	if (!aup->vaddr) {
		dev_err(&pdev->dev, "failed to allocate data buffers\n");

Annotation

Implementation Notes