drivers/net/ethernet/sfc/siena/efx_common.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/sfc/siena/efx_common.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/sfc/siena/efx_common.c
Extension
.c
Size
39359 bytes
Lines
1399
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

if (rc) {
			eth_hw_addr_set(net_dev, old_addr);
			return rc;
		}
	}

	/* Reconfigure the MAC */
	mutex_lock(&efx->mac_lock);
	efx_siena_mac_reconfigure(efx, false);
	mutex_unlock(&efx->mac_lock);

	return 0;
}

/* Context: netif_addr_lock held, BHs disabled. */
void efx_siena_set_rx_mode(struct net_device *net_dev)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	if (efx->port_enabled)
		queue_work(efx->workqueue, &efx->mac_work);
	/* Otherwise efx_start_port() will do this */
}

int efx_siena_set_features(struct net_device *net_dev, netdev_features_t data)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int rc;

	/* If disabling RX n-tuple filtering, clear existing filters */
	if (net_dev->features & ~data & NETIF_F_NTUPLE) {
		rc = efx->type->filter_clear_rx(efx, EFX_FILTER_PRI_MANUAL);
		if (rc)
			return rc;
	}

	/* If Rx VLAN filter is changed, update filters via mac_reconfigure.
	 * If rx-fcs is changed, mac_reconfigure updates that too.
	 */
	if ((net_dev->features ^ data) & (NETIF_F_HW_VLAN_CTAG_FILTER |
					  NETIF_F_RXFCS)) {
		/* efx_siena_set_rx_mode() will schedule MAC work to update filters
		 * when a new features are finally set in net_dev.
		 */
		efx_siena_set_rx_mode(net_dev);
	}

	return 0;
}

/* This ensures that the kernel is kept informed (via
 * netif_carrier_on/off) of the link status, and also maintains the
 * link status's stop on the port's TX queue.
 */
void efx_siena_link_status_changed(struct efx_nic *efx)
{
	struct efx_link_state *link_state = &efx->link_state;

	/* SFC Bug 5356: A net_dev notifier is registered, so we must ensure
	 * that no events are triggered between unregister_netdev() and the
	 * driver unloading. A more general condition is that NETDEV_CHANGE
	 * can only be generated between NETDEV_UP and NETDEV_DOWN
	 */
	if (!netif_running(efx->net_dev))
		return;

	if (link_state->up != netif_carrier_ok(efx->net_dev)) {
		efx->n_link_state_changes++;

		if (link_state->up)
			netif_carrier_on(efx->net_dev);
		else
			netif_carrier_off(efx->net_dev);
	}

	/* Status message for kernel log */
	if (link_state->up)
		netif_info(efx, link, efx->net_dev,
			   "link up at %uMbps %s-duplex (MTU %d)\n",
			   link_state->speed, link_state->fd ? "full" : "half",
			   efx->net_dev->mtu);
	else
		netif_info(efx, link, efx->net_dev, "link down\n");
}

unsigned int efx_siena_xdp_max_mtu(struct efx_nic *efx)
{
	/* The maximum MTU that we can fit in a single page, allowing for
	 * framing, overhead and XDP headroom + tailroom.
	 */

Annotation

Implementation Notes