There is also a `section dedicated to this poll mode driver
<http://www.mellanox.com/page/products_dyn?product_family=209&mtag=pmd_for_dpdk>`__.
-.. note::
-
- Due to external dependencies, this driver is disabled in default configuration
- of the "make" build. It can be enabled with ``CONFIG_RTE_LIBRTE_MLX5_PMD=y``
- or by using "meson" build system which will detect dependencies.
Design
------
reported via device xstats to assist applications to detect the
time-related problems.
+ The timestamp upper "too-distant-future" limit
+ at the moment of invoking the Tx burst routine
+ can be estimated as ``tx_pp`` option (in nanoseconds) multiplied by 2^23.
+ Please note, for the testpmd txonly mode,
+ the limit is deduced from the expression::
+
+ (n_tx_descriptors / burst_size + 1) * inter_burst_gap
+
There is no any packet reordering according timestamps is supposed,
neither within packet burst, nor between packets, it is an entirely
application responsibility to generate packets and its timestamps
- The input buffer, providing the removal size, is not validated.
- The buffer size must match the length of the headers to be removed.
-- ICMP/ICMP6 code/type matching, IP-in-IP and MPLS flow matching are all
+- ICMP(code/type/identifier/sequence number) / ICMP6(code/type) matching, IP-in-IP and MPLS flow matching are all
mutually exclusive features which cannot be supported together
(see :ref:`mlx5_firmware_config`).
for some NICs (such as ConnectX-6 Dx and BlueField 2).
The capability bit ``scatter_fcs_w_decap_disable`` shows NIC support.
+- Sample flow:
+
+ - Supports ``RTE_FLOW_ACTION_TYPE_SAMPLE`` action only within NIC Rx and E-Switch steering domain.
+ - The E-Switch Sample flow must have the eswitch_manager VPORT destination (PF or ECPF) and no additional actions.
+ - For ConnectX-5, the ``RTE_FLOW_ACTION_TYPE_SAMPLE`` is typically used as first action in the E-Switch egress flow if with header modify or encapsulation actions.
+
Statistics
----------
Compilation options
~~~~~~~~~~~~~~~~~~~
-These options can be modified in the ``.config`` file.
-
-- ``CONFIG_RTE_LIBRTE_MLX5_PMD`` (default **n**)
-
- Toggle compilation of librte_pmd_mlx5 itself.
-
-- ``CONFIG_RTE_IBVERBS_LINK_DLOPEN`` (default **n**)
-
- Build PMD with additional code to make it loadable without hard
- dependencies on **libibverbs** nor **libmlx5**, which may not be installed
- on the target system.
-
- In this mode, their presence is still required for it to run properly,
- however their absence won't prevent a DPDK application from starting (with
- ``CONFIG_RTE_BUILD_SHARED_LIB`` disabled) and they won't show up as
- missing with ``ldd(1)``.
-
- It works by moving these dependencies to a purpose-built rdma-core "glue"
- plug-in which must either be installed in a directory whose name is based
- on ``CONFIG_RTE_EAL_PMD_PATH`` suffixed with ``-glue`` if set, or in a
- standard location for the dynamic linker (e.g. ``/lib``) if left to the
- default empty string (``""``).
+The ibverbs libraries can be linked with this PMD in a number of ways,
+configured by the ``ibverbs_link`` build option:
- This option has no performance impact.
+- ``shared`` (default): the PMD depends on some .so files.
-- ``CONFIG_RTE_IBVERBS_LINK_STATIC`` (default **n**)
+- ``dlopen``: Split the dependencies glue in a separate library
+ loaded when needed by dlopen.
+ It make dependencies on libibverbs and libmlx4 optional,
+ and has no performance impact.
- Embed static flavor of the dependencies **libibverbs** and **libmlx5**
+- ``static``: Embed static flavor of the dependencies libibverbs and libmlx4
in the PMD shared library or the executable static binary.
-- ``CONFIG_RTE_LIBRTE_MLX5_DEBUG`` (default **n**)
-
- Toggle debugging code and stricter compilation flags. Enabling this option
- adds additional run-time checks and debugging messages at the cost of
- lower performance.
-
-.. note::
-
- For BlueField, target should be set to ``arm64-bluefield-linux-gcc``. This
- will enable ``CONFIG_RTE_LIBRTE_MLX5_PMD`` and set ``RTE_CACHE_LINE_SIZE`` to
- 64. Default armv8a configuration of make build and meson build set it to 128
- then brings performance degradation.
-
-This option is available in meson:
-
-- ``ibverbs_link`` can be ``static``, ``shared``, or ``dlopen``.
-
Environment variables
~~~~~~~~~~~~~~~~~~~~~
A list of directories in which to search for the rdma-core "glue" plug-in,
separated by colons or semi-colons.
- Only matters when compiled with ``CONFIG_RTE_IBVERBS_LINK_DLOPEN``
- enabled and most useful when ``CONFIG_RTE_EAL_PMD_PATH`` is also set,
- since ``LD_LIBRARY_PATH`` has no effect in this case.
-
- ``MLX5_SHUT_UP_BF``
Configures HW Tx doorbell register as IO-mapped.
FLEX_PARSER_PROFILE_ENABLE=1
-- enable ICMP/ICMP6 code/type fields matching::
+- enable ICMP(code/type/identifier/sequence number) / ICMP6(code/type) fields matching::
FLEX_PARSER_PROFILE_ENABLE=2
.. _`Linux installation documentation`: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/plain/Documentation/admin-guide/README.rst
.. _`RDMA Core installation documentation`: https://raw.githubusercontent.com/linux-rdma/rdma-core/master/README.md
-If rdma-core libraries are built but not installed, DPDK makefile can link them,
-thanks to these environment variables:
-
- - ``EXTRA_CFLAGS=-I/path/to/rdma-core/build/include``
- - ``EXTRA_LDFLAGS=-L/path/to/rdma-core/build/lib``
- - ``PKG_CONFIG_PATH=/path/to/rdma-core/build/lib/pkgconfig``
Mellanox OFED/EN
^^^^^^^^^^^^^^^^
echo [num_vfs] > /sys/class/infiniband/mlx5_0/device/sriov_numvfs
-6. Compile DPDK and you are ready to go. See instructions on
- :ref:`Development Kit Build System <Development_Kit_Build_System>`
+6. Install DPDK and you are ready to go.
+ See :doc:`compilation instructions <../linux_gsg/build_dpdk>`.
Enable switchdev mode
---------------------
| | | rdma-core 26 | | rdma-core 26 |
| | | ConnectX-5 | | ConnectX-5 |
+-----------------------+-----------------+-----------------+
+ | Sampling | | DPDK 20.11 | | DPDK 20.11 |
+ | | | OFED 5.2 | | OFED 5.2 |
+ | | | rdma-core 32 | | rdma-core 32 |
+ | | | ConnectX-5 | | ConnectX-5 |
+ +-----------------------+-----------------+-----------------+
Notes for metadata
------------------
git.droids-corp.org / dpdk.git / blobdiff