Function eth_dev_shared_data_prepare

dpdk/lib/ethdev/ethdev_private.c:324–370

}

void *
eth_dev_shared_data_prepare(void)
{
	const struct rte_memzone *mz;

	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
		const unsigned int flags = 0;

		if (eth_dev_shared_mz != NULL)
			goto out;

		/* Allocate port data and ownership shared memory. */
		mz = rte_memzone_reserve(MZ_RTE_ETH_DEV_DATA,
				sizeof(*eth_dev_shared_data),
				rte_socket_id(), flags);
		if (mz == NULL) {
			RTE_ETHDEV_LOG(ERR, "Cannot allocate ethdev shared data\n");
			goto out;
		}

		eth_dev_shared_mz = mz;
		eth_dev_shared_data = mz->addr;
		eth_dev_shared_data->allocated_owners = 0;
		eth_dev_shared_data->next_owner_id =
			RTE_ETH_DEV_NO_OWNER + 1;
		eth_dev_shared_data->allocated_ports = 0;
		memset(eth_dev_shared_data->data, 0,
		       sizeof(eth_dev_shared_data->data));
	} else {
		mz = rte_memzone_lookup(MZ_RTE_ETH_DEV_DATA);
		if (mz == NULL) {
			/* Clean remaining any traces of a previous shared mem */
			eth_dev_shared_mz = NULL;
			eth_dev_shared_data = NULL;
			RTE_ETHDEV_LOG(ERR, "Cannot lookup ethdev shared data\n");
			goto out;
		}
		if (mz == eth_dev_shared_mz && mz->addr == eth_dev_shared_data)
			goto out;

		/* Shared mem changed in primary process, refresh pointers */
		eth_dev_shared_mz = mz;
		eth_dev_shared_data = mz->addr;
	}
out:
	return eth_dev_shared_data;
}

void
eth_dev_shared_data_release(void)