drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
Extension
.c
Size
136561 bytes
Lines
4992
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 ixgbevf_netdev_ops = {
	.ndo_open		= ixgbevf_open,
	.ndo_stop		= ixgbevf_close,
	.ndo_start_xmit		= ixgbevf_xmit_frame,
	.ndo_set_rx_mode	= ixgbevf_set_rx_mode,
	.ndo_get_stats64	= ixgbevf_get_stats,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= ixgbevf_set_mac,
	.ndo_change_mtu		= ixgbevf_change_mtu,
	.ndo_tx_timeout		= ixgbevf_tx_timeout,
	.ndo_vlan_rx_add_vid	= ixgbevf_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid	= ixgbevf_vlan_rx_kill_vid,
	.ndo_features_check	= ixgbevf_features_check,
	.ndo_bpf		= ixgbevf_xdp,
};

static void ixgbevf_assign_netdev_ops(struct net_device *dev)
{
	dev->netdev_ops = &ixgbevf_netdev_ops;
	ixgbevf_set_ethtool_ops(dev);
	dev->watchdog_timeo = 5 * HZ;
}

/**
 * ixgbevf_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in ixgbevf_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
 * The OS initialization, configuring of the adapter private structure,
 * and a hardware reset occur.
 **/
static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct net_device *netdev;
	struct ixgbevf_adapter *adapter = NULL;
	struct ixgbe_hw *hw = NULL;
	const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
	bool disable_dev = false;
	int err;

	err = pci_enable_device(pdev);
	if (err)
		return err;

	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
	if (err) {
		dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
		goto err_dma;
	}

	err = pci_request_regions(pdev, ixgbevf_driver_name);
	if (err) {
		dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
		goto err_pci_reg;
	}

	pci_set_master(pdev);

	netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
				   MAX_TX_QUEUES);
	if (!netdev) {
		err = -ENOMEM;
		goto err_alloc_etherdev;
	}

	SET_NETDEV_DEV(netdev, &pdev->dev);

	adapter = netdev_priv(netdev);

	adapter->netdev = netdev;
	adapter->pdev = pdev;
	hw = &adapter->hw;
	hw->back = adapter;
	adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);

	/* call save state here in standalone driver because it relies on
	 * adapter struct to exist, and needs to call netdev_priv
	 */
	pci_save_state(pdev);

	hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
			      pci_resource_len(pdev, 0));
	adapter->io_addr = hw->hw_addr;
	if (!hw->hw_addr) {
		err = -EIO;
		goto err_ioremap;
	}

Annotation

Implementation Notes