static nvlist_t *
pci_iov_build_schema(nvlist_t **pf, nvlist_t **vf)
{
nvlist_t *schema, *pf_driver, *vf_driver;
/* We always take ownership of the schemas. */
pf_driver = *pf;
*pf = NULL;
vf_driver = *vf;
*vf = NULL;
schema = pci_iov_schema_alloc_node();
if (schema == NULL)
goto cleanup;
pci_iov_build_pf_schema(schema, &pf_driver);
pci_iov_build_vf_schema(schema, &vf_driver);
if (nvlist_error(schema) != 0)
goto cleanup;
return (schema);
cleanup:
nvlist_destroy(schema);
nvlist_destroy(pf_driver);
nvlist_destroy(vf_driver);
return (NULL);
}
static nvlist_t *
pci_iov_get_vf_subsystem_schema(void)
{
nvlist_t *vf;
vf = pci_iov_schema_alloc_node();
if (vf == NULL)
return (NULL);
pci_iov_schema_add_bool(vf, "passthrough", IOV_SCHEMA_HASDEFAULT, 0);
return (vf);
}
static nvlist_t *
pci_iov_get_pf_subsystem_schema(void)
{
nvlist_t *pf;
pf = pci_iov_schema_alloc_node();
if (pf == NULL)
return (NULL);
pci_iov_schema_add_uint16(pf, "num_vfs", IOV_SCHEMA_REQUIRED, -1);
pci_iov_schema_add_string(pf, "device", IOV_SCHEMA_REQUIRED, NULL);
return (pf);
}
static int
t4iov_attach_child(device_t dev)
{
struct t4iov_softc *sc;
#ifdef PCI_IOV
nvlist_t *pf_schema, *vf_schema;
#endif
device_t pdev;
int error;
sc = device_get_softc(dev);
MPASS(!sc->sc_attached);
/*
* PF0-3 are associated with a specific port on the NIC (PF0
* with port 0, etc.). Ask the PF4 driver for the device for
* this function's associated port to determine if the port is
* present.
*/
error = T4_READ_PORT_DEVICE(sc->sc_main, pci_get_function(dev), &pdev);
if (error)
return (0);
#ifdef PCI_IOV
pf_schema = pci_iov_schema_alloc_node();
vf_schema = pci_iov_schema_alloc_node();
error = pci_iov_attach_name(dev, pf_schema, vf_schema, "%s",
device_get_nameunit(pdev));
if (error) {
device_printf(dev, "Failed to initialize SR-IOV: %d\n", error);
return (0);
}
#endif
sc->sc_attached = true;
return (0);
}
static void
pci_iov_build_vf_schema(nvlist_t *schema, nvlist_t **driver_schema)
{
nvlist_t *vf_schema, *iov_schema;
vf_schema = pci_iov_schema_alloc_node();
if (vf_schema == NULL) {
nvlist_set_error(schema, ENOMEM);
return;
}
iov_schema = pci_iov_get_vf_subsystem_schema();
/*
* Note that if either *driver_schema or iov_schema is NULL, then
* nvlist_move_nvlist will put the schema in the error state and
* SR-IOV will fail to initialize later, so we don't have to explicitly
* handle that case.
*/
nvlist_move_nvlist(vf_schema, DRIVER_CONFIG_NAME, *driver_schema);
nvlist_move_nvlist(vf_schema, IOV_CONFIG_NAME, iov_schema);
nvlist_move_nvlist(schema, VF_SCHEMA_NAME, vf_schema);
*driver_schema = NULL;
}