Function mlx5_common_dev_probe

dpdk/drivers/common/mlx5/mlx5_common.c:960–1053

}

int
mlx5_common_dev_probe(struct rte_device *eal_dev)
{
	struct mlx5_common_device *cdev;
	struct mlx5_kvargs_ctrl mkvlist;
	struct mlx5_kvargs_ctrl *mkvlist_p = NULL;
	uint32_t classes = 0;
	bool new_device = false;
	int ret;

	DRV_LOG(INFO, "probe device \"%s\".", eal_dev->name);
	if (eal_dev->devargs != NULL && eal_dev->devargs->args != NULL)
		mkvlist_p = &mkvlist;
	ret = mlx5_kvargs_prepare(mkvlist_p, eal_dev->devargs);
	if (ret < 0) {
		DRV_LOG(ERR, "Unsupported device arguments: %s",
			eal_dev->devargs->args);
		return ret;
	}
	ret = parse_class_options(eal_dev->devargs, mkvlist_p);
	if (ret < 0) {
		DRV_LOG(ERR, "Unsupported mlx5 class type: %s",
			eal_dev->devargs->args);
		goto class_err;
	}
	classes = ret;
	if (classes == 0)
		/* Default to net class. */
		classes = MLX5_CLASS_ETH;
	/*
	 * MLX5 common driver supports probing again in two scenarios:
	 * - Add new driver under existing common device (regardless of the
	 *   driver's own support in probing again).
	 * - Transfer the probing again support of the drivers themselves.
	 *
	 * In both scenarios it uses in the existing device. here it looks for
	 * device that match to rte device, if it exists, the request classes
	 * were probed with this device.
	 */
	cdev = to_mlx5_device(eal_dev);
	if (!cdev) {
		/* It isn't probing again, creates a new device. */
		cdev = mlx5_common_dev_create(eal_dev, classes, mkvlist_p);
		if (!cdev) {
			ret = -ENOMEM;
			goto class_err;
		}
		new_device = true;
	} else {
		/* It is probing again, validate common devargs match. */
		ret = mlx5_common_probe_again_args_validate(cdev, mkvlist_p);
		if (ret) {
			DRV_LOG(ERR,
				"Probe again parameters aren't compatible : %s",
				strerror(rte_errno));
			goto class_err;
		}
	}