1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright(c) 2019 Marvell International Ltd.
4 OCTEON TX2 NPA Mempool Driver
5 =============================
7 The OCTEON TX2 NPA PMD (**librte_mempool_octeontx2**) provides mempool
8 driver support for the integrated mempool device found in **Marvell OCTEON TX2** SoC family.
10 More information about OCTEON TX2 SoC can be found at `Marvell Official Website
11 <https://www.marvell.com/embedded-processors/infrastructure-processors/>`_.
16 OCTEON TX2 NPA PMD supports:
21 - Ethdev Rx buffer allocation in HW to save CPU cycles in the Rx path.
22 - Ethdev Tx buffer recycling in HW to save CPU cycles in the Tx path.
24 Prerequisites and Compilation procedure
25 ---------------------------------------
27 See :doc:`../platform/octeontx2` for setup information.
29 Pre-Installation Configuration
30 ------------------------------
33 Runtime Config Options
34 ~~~~~~~~~~~~~~~~~~~~~~
36 - ``Maximum number of mempools per application`` (default ``128``)
38 The maximum number of mempools per application needs to be configured on
39 HW during mempool driver initialization. HW can support up to 1M mempools,
40 Since each mempool costs set of HW resources, the ``max_pools`` ``devargs``
41 parameter is being introduced to configure the number of mempools required
45 -a 0002:02:00.0,max_pools=512
47 With the above configuration, the driver will set up only 512 mempools for
48 the given application to save HW resources.
52 Since this configuration is per application, the end user needs to
53 provide ``max_pools`` parameter to the first PCIe device probed by the given
56 - ``Lock NPA contexts in NDC``
58 Lock NPA aura and pool contexts in NDC cache.
59 The device args take hexadecimal bitmask where each bit represent the
60 corresponding aura/pool id.
64 -a 0002:02:00.0,npa_lock_mask=0xf
69 .. _table_octeontx2_mempool_debug_options:
71 .. table:: OCTEON TX2 mempool debug options
73 +---+------------+-------------------------------------------------------+
74 | # | Component | EAL log command |
75 +===+============+=======================================================+
76 | 1 | NPA | --log-level='pmd\.mempool.octeontx2,8' |
77 +---+------------+-------------------------------------------------------+
79 Standalone mempool device
80 ~~~~~~~~~~~~~~~~~~~~~~~~~
82 The ``usertools/dpdk-devbind.py`` script shall enumerate all the mempool devices
83 available in the system. In order to avoid, the end user to bind the mempool
84 device prior to use ethdev and/or eventdev device, the respective driver
85 configures an NPA LF and attach to the first probed ethdev or eventdev device.
86 In case, if end user need to run mempool as a standalone device
87 (without ethdev or eventdev), end user needs to bind a mempool device using
88 ``usertools/dpdk-devbind.py``
90 Example command to run ``mempool_autotest`` test with standalone OCTEONTX2 NPA device::
92 echo "mempool_autotest" | <build_dir>/app/test/dpdk-test -c 0xf0 --mbuf-pool-ops-name="octeontx2_npa"