Function rte_bbdev_allocate

dpdk/lib/bbdev/rte_bbdev.c:173–230

}

struct rte_bbdev *
rte_bbdev_allocate(const char *name)
{
	int ret;
	struct rte_bbdev *bbdev;
	uint16_t dev_id;

	if (name == NULL) {
		rte_bbdev_log(ERR, "Invalid null device name");
		return NULL;
	}

	if (rte_bbdev_get_named_dev(name) != NULL) {
		rte_bbdev_log(ERR, "Device \"%s\" is already allocated", name);
		return NULL;
	}

	dev_id = find_free_dev_id();
	if (dev_id == RTE_BBDEV_MAX_DEVS) {
		rte_bbdev_log(ERR, "Reached maximum number of devices");
		return NULL;
	}

	bbdev = &rte_bbdev_devices[dev_id];

	if (rte_bbdev_data == NULL) {
		ret = rte_bbdev_data_alloc();
		if (ret != 0)
			return NULL;
	}

	bbdev->data = find_bbdev_data(name);
	if (bbdev->data == NULL) {
		rte_bbdev_log(ERR,
				"Max BBDevs already allocated in multi-process environment!");
		return NULL;
	}

	rte_atomic_fetch_add_explicit(&bbdev->data->process_cnt, 1, rte_memory_order_relaxed);
	bbdev->data->dev_id = dev_id;
	bbdev->state = RTE_BBDEV_INITIALIZED;

	ret = snprintf(bbdev->data->name, RTE_BBDEV_NAME_MAX_LEN, "%s", name);
	if ((ret < 0) || (ret >= RTE_BBDEV_NAME_MAX_LEN)) {
		rte_bbdev_log(ERR, "Copying device name \"%s\" failed", name);
		return NULL;
	}

	/* init user callbacks */
	TAILQ_INIT(&(bbdev->list_cbs));

	num_devs++;

	rte_bbdev_log_debug("Initialised device %s (id = %u). Num devices = %u",
			name, dev_id, num_devs);

	return bbdev;
}