1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright(c) 2020 Intel Corporation.
4 Driver for the IntelĀ® Dynamic Load Balancer (DLB2)
5 ==================================================
7 The DPDK dlb poll mode driver supports the IntelĀ® Dynamic Load Balancer.
12 Follow the DPDK :ref:`Getting Started Guide for Linux <linux_gsg>` to setup
13 the basic DPDK environment.
18 The DLB2 PF PMD is a user-space PMD that uses VFIO to gain direct
19 device access. To use this operation mode, the PCIe PF device must be bound
20 to a DPDK-compatible VFIO driver, such as vfio-pci.
25 The DLB2 provides the functions of a DPDK event device; specifically, it
26 supports atomic, ordered, and parallel scheduling events from queues to ports.
27 However, the DLB2 hardware is not a perfect match to the eventdev API. Some DLB2
28 features are abstracted by the PMD such as directed ports.
30 In general the dlb PMD is designed for ease-of-use and does not require a
31 detailed understanding of the hardware, but these details are important when
32 writing high-performance code. This section describes the places where the
33 eventdev API and DLB2 misalign.
38 The flow ID field is preserved in the event when it is scheduled in the