drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/wangxun/txgbevf/txgbevf_main.c
Extension
.c
Size
8520 bytes
Lines
332
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 txgbevf_netdev_ops = {
	.ndo_open               = wxvf_open,
	.ndo_stop               = wxvf_close,
	.ndo_start_xmit         = wx_xmit_frame,
	.ndo_validate_addr      = eth_validate_addr,
	.ndo_set_mac_address    = wx_set_mac_vf,
};

static void txgbevf_set_num_queues(struct wx *wx)
{
	u32 def_q = 0, num_tcs = 0;
	u16 rss, queue;
	int ret = 0;

	/* Start with base case */
	wx->num_rx_queues = 1;
	wx->num_tx_queues = 1;

	spin_lock_bh(&wx->mbx.mbx_lock);
	/* fetch queue configuration from the PF */
	ret = wx_get_queues_vf(wx, &num_tcs, &def_q);
	spin_unlock_bh(&wx->mbx.mbx_lock);

	if (ret)
		return;

	/* we need as many queues as traffic classes */
	if (num_tcs > 1) {
		wx->num_rx_queues = num_tcs;
	} else {
		rss = min_t(u16, num_online_cpus(), TXGBEVF_MAX_RSS_NUM);
		queue = min_t(u16, wx->mac.max_rx_queues, wx->mac.max_tx_queues);
		rss = min_t(u16, queue, rss);

		if (wx->vfinfo->vf_api >= wx_mbox_api_13) {
			wx->num_rx_queues = rss;
			wx->num_tx_queues = rss;
		}
	}
}

static void txgbevf_init_type_code(struct wx *wx)
{
	switch (wx->device_id) {
	case TXGBEVF_DEV_ID_SP1000:
	case TXGBEVF_DEV_ID_WX1820:
		wx->mac.type = wx_mac_sp;
		break;
	case TXGBEVF_DEV_ID_AML500F:
	case TXGBEVF_DEV_ID_AML510F:
	case TXGBEVF_DEV_ID_AML5024:
	case TXGBEVF_DEV_ID_AML5124:
	case TXGBEVF_DEV_ID_AML503F:
	case TXGBEVF_DEV_ID_AML513F:
		wx->mac.type = wx_mac_aml;
		break;
	default:
		wx->mac.type = wx_mac_unknown;
		break;
	}
}

static int txgbevf_sw_init(struct wx *wx)
{
	struct net_device *netdev = wx->netdev;
	struct pci_dev *pdev = wx->pdev;
	int err;

	/* Initialize pcie info and common capability flags */
	err = wx_sw_init(wx);
	if (err < 0)
		goto err_wx_sw_init;

	/* Initialize the mailbox */
	err = wx_init_mbx_params_vf(wx);
	if (err)
		goto err_init_mbx_params;

	/* max q_vectors */
	wx->mac.max_msix_vectors = TXGBEVF_MAX_MSIX_VECTORS;
	/* Initialize the device type */
	txgbevf_init_type_code(wx);
	/* lock to protect mailbox accesses */
	spin_lock_init(&wx->mbx.mbx_lock);

	err = wx_reset_hw_vf(wx);
	if (err) {
		wx_err(wx, "PF still in reset state. Is the PF interface up?\n");
		goto err_reset_hw;
	}

Annotation

Implementation Notes