struct net_device *
nfp_repr_alloc_mqs(struct nfp_app *app, unsigned int txqs, unsigned int rxqs)
{
struct net_device *netdev;
struct nfp_repr *repr;
netdev = alloc_etherdev_mqs(sizeof(*repr), txqs, rxqs);
if (!netdev)
return NULL;
netif_carrier_off(netdev);
repr = netdev_priv(netdev);
repr->netdev = netdev;
repr->app = app;
repr->stats = netdev_alloc_pcpu_stats(struct nfp_repr_pcpu_stats);
if (!repr->stats)
goto err_free_netdev;
return netdev;
err_free_netdev:
free_netdev(netdev);
return NULL;
}
struct net_device *devm_alloc_etherdev_mqs(struct device *dev, int sizeof_priv,
unsigned int txqs, unsigned int rxqs)
{
struct net_device **dr;
struct net_device *netdev;
dr = devres_alloc(devm_free_netdev, sizeof(*dr), GFP_KERNEL);
if (!dr)
return NULL;
netdev = alloc_etherdev_mqs(sizeof_priv, txqs, rxqs);
if (!netdev) {
devres_free(dr);
return NULL;
}
*dr = netdev;
devres_add(dev, dr);
return netdev;
}
/* bar must be a virtual address (whether it's host or guest),
* where the kernel can directly access to */
int sn_create_netdev(void *bar, struct sn_device **dev_ret)
{
struct sn_conf_space *conf = bar;
struct sn_device *dev;
struct net_device *netdev;
char *name;
int ret;
*dev_ret = NULL;
if (conf->bar_size < sizeof(struct sn_conf_space)) {
log_err("invalid BAR size %llu\n", conf->bar_size);
return -EINVAL;
}
if (conf->num_txq < 1 || conf->num_rxq < 1 ||
conf->num_txq > MAX_QUEUES ||
conf->num_rxq > MAX_QUEUES)
{
log_err("invalid ioctl arguments: num_txq=%d, num_rxq=%d\n",
conf->num_txq, conf->num_rxq);
return -EINVAL;
}
netdev = alloc_etherdev_mqs(sizeof(struct sn_device),
conf->num_txq, conf->num_rxq);
if (!netdev) {
log_err("alloc_netdev_mqs() failed\n");
return -ENOMEM;
}
if (strcmp(conf->ifname, "") == 0)
name = "sn%d";
else
name = conf->ifname;
ret = dev_alloc_name(netdev, name);
if (ret < 0) {
log_err("failed to alloc name %s\n", name);
free_netdev(netdev);
return ret;
}
dev = netdev_priv(netdev);
dev->netdev = netdev;
dev->num_txq = conf->num_txq;
dev->num_rxq = conf->num_rxq;
sn_set_default_queue_mapping(dev);
/* This will disable the default qdisc (mq or pfifo_fast) on the
* interface. We don't need qdisc since BESS already has its own.
* Also see attach_default_qdiscs() in sch_generic.c */
netdev->tx_queue_len = 0;
netdev->destructor = sn_netdev_destructor;
sn_set_offloads(netdev);
netdev->netdev_ops = &sn_netdev_ops;
netdev->ethtool_ops = &sn_ethtool_ops;
memcpy(netdev->dev_addr, conf->mac_addr, ETH_ALEN);
ret = sn_alloc_queues(dev, conf + 1,
conf->bar_size - sizeof(struct sn_conf_space),
&conf->txq_opts, &conf->rxq_opts);
if (ret) {
log_err("sn_alloc_queues() failed\n");
free_netdev(netdev);
return ret;
}
*dev_ret = dev;
return 0;
}
