1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright(C) 2021 Marvell.
4 cnxk NPA Mempool Driver
5 =======================
7 The cnxk NPA PMD (**librte_mempool_cnxk**) provides mempool driver support for
8 the integrated mempool device found in **Marvell OCTEON CN9K/CN10K** SoC family.
10 More information about cnxk SoC can be found at `Marvell Official Website
11 <https://www.marvell.com/embedded-processors/infrastructure-processors/>`_.
16 cnxk 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.
26 - Burst alloc of up to 32 pointers.
30 - Batch dequeue of up to 512 pointers with single instruction.
31 - Batch enqueue of up to 15 pointers with single instruction.
33 Prerequisites and Compilation procedure
34 ---------------------------------------
36 See :doc:`../platform/cnxk` for setup information.
38 Pre-Installation Configuration
39 ------------------------------
42 Runtime Config Options
43 ~~~~~~~~~~~~~~~~~~~~~~
45 - ``Maximum number of mempools per application`` (default ``128``)
47 The maximum number of mempools per application needs to be configured on
48 HW during mempool driver initialization. HW can support up to 1M mempools,
49 Since each mempool costs set of HW resources, the ``max_pools`` ``devargs``
50 parameter is being introduced to configure the number of mempools required
54 -a 0002:02:00.0,max_pools=512
56 With the above configuration, the driver will set up only 512 mempools for
57 the given application to save HW resources.
61 Since this configuration is per application, the end user needs to
62 provide ``max_pools`` parameter to the first PCIe device probed by the given
68 .. _table_cnxk_mempool_debug_options:
70 .. table:: cnxk mempool debug options
72 +---+------------+-------------------------------------------------------+
73 | # | Component | EAL log command |
74 +===+============+=======================================================+
75 | 1 | NPA | --log-level='pmd\.mempool.cnxk,8' |
76 +---+------------+-------------------------------------------------------+
78 Standalone mempool device
79 ~~~~~~~~~~~~~~~~~~~~~~~~~
81 The ``usertools/dpdk-devbind.py`` script shall enumerate all the mempool
82 devices available in the system. In order to avoid, the end user to bind the
83 mempool device prior to use ethdev and/or eventdev device, the respective
84 driver configures an NPA LF and attach to the first probed ethdev or eventdev
85 device. In case, if end user need to run mempool as a standalone device
86 (without ethdev or eventdev), end user needs to bind a mempool device using
87 ``usertools/dpdk-devbind.py``
89 Example command to run ``mempool_autotest`` test with standalone CN10K NPA device::
91 echo "mempool_autotest" | <build_dir>/app/test/dpdk-test -c 0xf0 --mbuf-pool-ops-name="cn10k_mempool_ops"