drivers/net/ethernet/brocade/bna/bnad.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/brocade/bna/bnad.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/brocade/bna/bnad.c
Extension
.c
Size
94081 bytes
Lines
3850
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 bnad_netdev_ops = {
	.ndo_open		= bnad_open,
	.ndo_stop		= bnad_stop,
	.ndo_start_xmit		= bnad_start_xmit,
	.ndo_get_stats64	= bnad_get_stats64,
	.ndo_set_rx_mode	= bnad_set_rx_mode,
	.ndo_validate_addr      = eth_validate_addr,
	.ndo_set_mac_address    = bnad_set_mac_address,
	.ndo_change_mtu		= bnad_change_mtu,
	.ndo_vlan_rx_add_vid    = bnad_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid   = bnad_vlan_rx_kill_vid,
	.ndo_set_features	= bnad_set_features,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller    = bnad_netpoll
#endif
};

static void
bnad_netdev_init(struct bnad *bnad)
{
	struct net_device *netdev = bnad->netdev;

	netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
		NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
		NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_HW_VLAN_CTAG_TX |
		NETIF_F_HW_VLAN_CTAG_RX;

	netdev->vlan_features = NETIF_F_SG | NETIF_F_HIGHDMA |
		NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
		NETIF_F_TSO | NETIF_F_TSO6;

	netdev->features |= netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER |
			    NETIF_F_HIGHDMA;

	netdev->mem_start = bnad->mmio_start;
	netdev->mem_end = bnad->mmio_start + bnad->mmio_len - 1;

	/* MTU range: 46 - 9000 */
	netdev->min_mtu = ETH_ZLEN - ETH_HLEN;
	netdev->max_mtu = BNAD_JUMBO_MTU;

	netdev->netdev_ops = &bnad_netdev_ops;
	bnad_set_ethtool_ops(netdev);
}

/*
 * 1. Initialize the bnad structure
 * 2. Setup netdev pointer in pci_dev
 * 3. Initialize no. of TxQ & CQs & MSIX vectors
 * 4. Initialize work queue.
 */
static int
bnad_init(struct bnad *bnad,
	  struct pci_dev *pdev, struct net_device *netdev)
{
	unsigned long flags;

	SET_NETDEV_DEV(netdev, &pdev->dev);
	pci_set_drvdata(pdev, netdev);

	bnad->netdev = netdev;
	bnad->pcidev = pdev;
	bnad->mmio_start = pci_resource_start(pdev, 0);
	bnad->mmio_len = pci_resource_len(pdev, 0);
	bnad->bar0 = ioremap(bnad->mmio_start, bnad->mmio_len);
	if (!bnad->bar0) {
		dev_err(&pdev->dev, "ioremap for bar0 failed\n");
		return -ENOMEM;
	}
	dev_info(&pdev->dev, "bar0 mapped to %p, len %llu\n", bnad->bar0,
		 (unsigned long long) bnad->mmio_len);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	if (!bnad_msix_disable)
		bnad->cfg_flags = BNAD_CF_MSIX;

	bnad->cfg_flags |= BNAD_CF_DIM_ENABLED;

	bnad_q_num_init(bnad);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	bnad->msix_num = (bnad->num_tx * bnad->num_txq_per_tx) +
		(bnad->num_rx * bnad->num_rxp_per_rx) +
			 BNAD_MAILBOX_MSIX_VECTORS;

	bnad->txq_depth = BNAD_TXQ_DEPTH;
	bnad->rxq_depth = BNAD_RXQ_DEPTH;

	bnad->tx_coalescing_timeo = BFI_TX_COALESCING_TIMEO;
	bnad->rx_coalescing_timeo = BFI_RX_COALESCING_TIMEO;

Annotation

Implementation Notes