drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c
Extension
.c
Size
3443 bytes
Lines
121
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source 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

#ifdef CONFIG_CHELSIO_T4_FCOE

#include <scsi/fc/fc_fs.h>
#include <scsi/libfcoe.h>
#include "cxgb4.h"

bool cxgb_fcoe_sof_eof_supported(struct adapter *adap, struct sk_buff *skb)
{
	struct fcoe_hdr *fcoeh = (struct fcoe_hdr *)skb_network_header(skb);
	u8 sof = fcoeh->fcoe_sof;
	u8 eof = 0;

	if ((sof != FC_SOF_I3) && (sof != FC_SOF_N3)) {
		dev_err(adap->pdev_dev, "Unsupported SOF 0x%x\n", sof);
		return false;
	}

	skb_copy_bits(skb, skb->len - 4, &eof, 1);

	if ((eof != FC_EOF_N) && (eof != FC_EOF_T)) {
		dev_err(adap->pdev_dev, "Unsupported EOF 0x%x\n", eof);
		return false;
	}

	return true;
}

/**
 * cxgb_fcoe_enable - enable FCoE offload features
 * @netdev: net device
 *
 * Returns 0 on success or -EINVAL on failure.
 */
int cxgb_fcoe_enable(struct net_device *netdev)
{
	struct port_info *pi = netdev_priv(netdev);
	struct adapter *adap = pi->adapter;
	struct cxgb_fcoe *fcoe = &pi->fcoe;

	if (is_t4(adap->params.chip))
		return -EINVAL;

	if (!(adap->flags & CXGB4_FULL_INIT_DONE))
		return -EINVAL;

	dev_info(adap->pdev_dev, "Enabling FCoE offload features\n");

	netdev->features |= NETIF_F_FCOE_CRC;
	netdev->vlan_features |= NETIF_F_FCOE_CRC;
	netdev->fcoe_mtu = true;

	netdev_features_change(netdev);

	fcoe->flags |= CXGB_FCOE_ENABLED;

	return 0;
}

/**
 * cxgb_fcoe_disable - disable FCoE offload
 * @netdev: net device
 *
 * Returns 0 on success or -EINVAL on failure.
 */
int cxgb_fcoe_disable(struct net_device *netdev)
{
	struct port_info *pi = netdev_priv(netdev);
	struct adapter *adap = pi->adapter;
	struct cxgb_fcoe *fcoe = &pi->fcoe;

	if (!(fcoe->flags & CXGB_FCOE_ENABLED))
		return -EINVAL;

	dev_info(adap->pdev_dev, "Disabling FCoE offload features\n");

	fcoe->flags &= ~CXGB_FCOE_ENABLED;

	netdev->features &= ~NETIF_F_FCOE_CRC;
	netdev->vlan_features &= ~NETIF_F_FCOE_CRC;
	netdev->fcoe_mtu = false;

	netdev_features_change(netdev);

	return 0;
}
#endif /* CONFIG_CHELSIO_T4_FCOE */

Annotation

Implementation Notes