Function rte_eth_dev_pci_allocate

dpdk/lib/ethdev/ethdev_pci.h:79–127

* @internal * Allocates a new ethdev slot for an Ethernet device and returns the pointer * to that slot for the driver to use. * * @param dev * Pointer to the PCI device * * @param private_data_size * Size of private data structure * * @return * A pointer to a rte_eth_dev or NULL if allocation failed. */

 *	A pointer to a rte_eth_dev or NULL if allocation failed.
 */
static inline struct rte_eth_dev *
rte_eth_dev_pci_allocate(struct rte_pci_device *dev, size_t private_data_size)
{
	struct rte_eth_dev *eth_dev;
	const char *name;

	if (!dev)
		return NULL;

	name = dev->device.name;

	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
		eth_dev = rte_eth_dev_allocate(name);
		if (!eth_dev)
			return NULL;

		if (private_data_size) {
			/* Try and alloc the private-data structure on socket local to the device */
			eth_dev->data->dev_private = rte_zmalloc_socket(name,
				private_data_size, RTE_CACHE_LINE_SIZE,
				dev->device.numa_node);

			/* if cannot allocate memory on the socket local to the device
			 * use rte_malloc to allocate memory on some other socket, if available.
			 */
			if (eth_dev->data->dev_private == NULL) {
				eth_dev->data->dev_private = rte_zmalloc(name,
						private_data_size, RTE_CACHE_LINE_SIZE);

				if (eth_dev->data->dev_private == NULL) {
					rte_eth_dev_release_port(eth_dev);
					return NULL;
				}
				/* got memory, but not local, so issue warning */
				RTE_ETHDEV_LOG(WARNING,
					       "Private data for ethdev '%s' not allocated on local NUMA node %d\n",
					       dev->device.name, dev->device.numa_node);
			}
		}
	} else {
		eth_dev = rte_eth_dev_attach_secondary(name);
		if (!eth_dev)
			return NULL;
	}

	eth_dev->device = &dev->device;
	rte_eth_copy_pci_info(eth_dev, dev);
	return eth_dev;
}

typedef int (*eth_dev_pci_callback_t)(struct rte_eth_dev *eth_dev);