drivers/net/ethernet/cavium/octeon/octeon_mgmt.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/cavium/octeon/octeon_mgmt.c
Extension
.c
Size
41905 bytes
Lines
1559
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 octeon_mgmt_ops = {
	.ndo_open =			octeon_mgmt_open,
	.ndo_stop =			octeon_mgmt_stop,
	.ndo_start_xmit =		octeon_mgmt_xmit,
	.ndo_set_rx_mode =		octeon_mgmt_set_rx_filtering,
	.ndo_set_mac_address =		octeon_mgmt_set_mac_address,
	.ndo_eth_ioctl =		phy_do_ioctl,
	.ndo_change_mtu =		octeon_mgmt_change_mtu,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller =		octeon_mgmt_poll_controller,
#endif
	.ndo_hwtstamp_get =		octeon_mgmt_hwtstamp_get,
	.ndo_hwtstamp_set =		octeon_mgmt_hwtstamp_set,
};

static int octeon_mgmt_probe(struct platform_device *pdev)
{
	struct net_device *netdev;
	struct octeon_mgmt *p;
	const __be32 *data;
	struct resource *res_mix;
	struct resource *res_agl;
	struct resource *res_agl_prt_ctl;
	int len;
	int result;

	netdev = alloc_etherdev(sizeof(struct octeon_mgmt));
	if (netdev == NULL)
		return -ENOMEM;

	SET_NETDEV_DEV(netdev, &pdev->dev);

	platform_set_drvdata(pdev, netdev);
	p = netdev_priv(netdev);
	netif_napi_add_weight(netdev, &p->napi, octeon_mgmt_napi_poll,
			      OCTEON_MGMT_NAPI_WEIGHT);

	p->netdev = netdev;
	p->dev = &pdev->dev;
	p->has_rx_tstamp = false;

	data = of_get_property(pdev->dev.of_node, "cell-index", &len);
	if (data && len == sizeof(*data)) {
		p->port = be32_to_cpup(data);
	} else {
		dev_err(&pdev->dev, "no 'cell-index' property\n");
		result = -ENXIO;
		goto err;
	}

	snprintf(netdev->name, IFNAMSIZ, "mgmt%d", p->port);

	result = platform_get_irq(pdev, 0);
	if (result < 0)
		goto err;

	p->irq = result;

	res_mix = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res_mix == NULL) {
		dev_err(&pdev->dev, "no 'reg' resource\n");
		result = -ENXIO;
		goto err;
	}

	res_agl = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (res_agl == NULL) {
		dev_err(&pdev->dev, "no 'reg' resource\n");
		result = -ENXIO;
		goto err;
	}

	res_agl_prt_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 3);
	if (res_agl_prt_ctl == NULL) {
		dev_err(&pdev->dev, "no 'reg' resource\n");
		result = -ENXIO;
		goto err;
	}

	p->mix_phys = res_mix->start;
	p->mix_size = resource_size(res_mix);
	p->agl_phys = res_agl->start;
	p->agl_size = resource_size(res_agl);
	p->agl_prt_ctl_phys = res_agl_prt_ctl->start;
	p->agl_prt_ctl_size = resource_size(res_agl_prt_ctl);


	if (!devm_request_mem_region(&pdev->dev, p->mix_phys, p->mix_size,
				     res_mix->name)) {
		dev_err(&pdev->dev, "request_mem_region (%s) failed\n",

Annotation

Implementation Notes