drivers/net/ethernet/sfc/ef10_sriov.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/sfc/ef10_sriov.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/sfc/ef10_sriov.c
Extension
.c
Size
20303 bytes
Lines
807
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 (vf->vport_assigned) {
			efx_ef10_evb_port_assign(efx, EVB_PORT_ID_NULL, i);
			vf->vport_assigned = 0;
		}

		if (!is_zero_ether_addr(vf->mac)) {
			efx_ef10_vport_del_mac(efx, vf->vport_id, vf->mac);
			eth_zero_addr(vf->mac);
		}

		if (vf->vport_id) {
			efx_ef10_vport_free(efx, vf->vport_id);
			vf->vport_id = 0;
		}

		vf->efx = NULL;
	}
}

static void efx_ef10_sriov_free_vf_vswitching(struct efx_nic *efx)
{
	struct efx_ef10_nic_data *nic_data = efx->nic_data;

	efx_ef10_sriov_free_vf_vports(efx);
	kfree(nic_data->vf);
	nic_data->vf = NULL;
}

static int efx_ef10_sriov_assign_vf_vport(struct efx_nic *efx,
					  unsigned int vf_i)
{
	struct efx_ef10_nic_data *nic_data = efx->nic_data;
	struct ef10_vf *vf = nic_data->vf + vf_i;
	int rc;

	if (WARN_ON_ONCE(!nic_data->vf))
		return -EOPNOTSUPP;

	rc = efx_ef10_vport_alloc(efx, EVB_PORT_ID_ASSIGNED,
				  MC_CMD_VPORT_ALLOC_IN_VPORT_TYPE_NORMAL,
				  vf->vlan, &vf->vport_id);
	if (rc)
		return rc;

	rc = efx_ef10_vport_add_mac(efx, vf->vport_id, vf->mac);
	if (rc) {
		eth_zero_addr(vf->mac);
		return rc;
	}

	rc =  efx_ef10_evb_port_assign(efx, vf->vport_id, vf_i);
	if (rc)
		return rc;

	vf->vport_assigned = 1;
	return 0;
}

static int efx_ef10_sriov_alloc_vf_vswitching(struct efx_nic *efx)
{
	struct efx_ef10_nic_data *nic_data = efx->nic_data;
	unsigned int i;
	int rc;

	nic_data->vf = kzalloc_objs(struct ef10_vf, efx->vf_count);
	if (!nic_data->vf)
		return -ENOMEM;

	for (i = 0; i < efx->vf_count; i++) {
		eth_random_addr(nic_data->vf[i].mac);
		nic_data->vf[i].efx = NULL;
		nic_data->vf[i].vlan = EFX_EF10_NO_VLAN;

		rc = efx_ef10_sriov_assign_vf_vport(efx, i);
		if (rc)
			goto fail;
	}

	return 0;
fail:
	efx_ef10_sriov_free_vf_vswitching(efx);
	return rc;
}

static int efx_ef10_sriov_restore_vf_vswitching(struct efx_nic *efx)
{
	unsigned int i;
	int rc;

	for (i = 0; i < efx->vf_count; i++) {

Annotation

Implementation Notes