Function mlx5_dev_hw_global_prepare

dpdk/drivers/common/mlx5/mlx5_common.c:692–726

* Initialize all HW global of device context. * * @param cdev * Pointer to mlx5 device structure. * @param classes * Chosen classes come from user device arguments. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */

 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
static int
mlx5_dev_hw_global_prepare(struct mlx5_common_device *cdev, uint32_t classes)
{
	int ret;

	/* Create context device */
	ret = mlx5_os_open_device(cdev, classes);
	if (ret < 0)
		return ret;
	/*
	 * When CTX is created by Verbs, query HCA attribute is unsupported.
	 * When CTX is imported, we cannot know if it is created by DevX or
	 * Verbs. So, we use query HCA attribute function to check it.
	 */
	if (cdev->config.devx || cdev->config.device_fd != MLX5_ARG_UNSET) {
		/* Query HCA attributes. */
		ret = mlx5_devx_cmd_query_hca_attr(cdev->ctx,
						   &cdev->config.hca_attr);
		if (ret) {
			DRV_LOG(ERR, "Unable to read HCA caps in DevX mode.");
			rte_errno = ENOTSUP;
			goto error;
		}
		cdev->config.devx = 1;
	}
	DRV_LOG(DEBUG, "DevX is %ssupported.", cdev->config.devx ? "" : "NOT ");
	/* Prepare Protection Domain object and extract its pdn. */
	ret = mlx5_os_pd_prepare(cdev);
	if (ret)
		goto error;
	return 0;
error:
	mlx5_dev_hw_global_release(cdev);
	return ret;
}

static void
mlx5_common_dev_release(struct mlx5_common_device *cdev)