[dpdk-dev] [PATCH v2 10/10] compress/mlx5: add the supported capabilities

[Akhil Goyal]

> Subject: [PATCH v2 10/10] compress/mlx5: add the supported capabilities
> 
> Add all the capabilities supported by the device.
> 
> Add the driver documentations.
> 
> Signed-off-by: Matan Azrad <matan at nvidia.com>
> ---
>  doc/guides/compressdevs/features/mlx5.ini | 13 +++++
>  doc/guides/compressdevs/index.rst         |  1 +
>  doc/guides/compressdevs/mlx5.rst          | 84
> +++++++++++++++++++++++++++++++
>  doc/guides/rel_notes/release_21_02.rst    |  6 +++
>  drivers/compress/mlx5/mlx5_compress.c     | 24 ++++++++-
>  5 files changed, 126 insertions(+), 2 deletions(-)
>  create mode 100644 doc/guides/compressdevs/features/mlx5.ini
>  create mode 100644 doc/guides/compressdevs/mlx5.rst
> 
> diff --git a/doc/guides/compressdevs/features/mlx5.ini
> b/doc/guides/compressdevs/features/mlx5.ini
> new file mode 100644
> index 0000000..891ce47
> --- /dev/null
> +++ b/doc/guides/compressdevs/features/mlx5.ini
> @@ -0,0 +1,13 @@
> +;
> +; Refer to default.ini for the full list of available PMD features.
> +;
> +; Supported features of 'MLX5' compression driver.
> +;
> +[Features]
> +HW Accelerated = Y
> +Deflate        = Y
> +Adler32        = Y
> +Crc32          = Y
> +Adler32&Crc32  = Y
> +Fixed          = Y
> +Dynamic        = Y
> diff --git a/doc/guides/compressdevs/index.rst
> b/doc/guides/compressdevs/index.rst
> index 1f37e26..8f9f3a5 100644
> --- a/doc/guides/compressdevs/index.rst
> +++ b/doc/guides/compressdevs/index.rst
> @@ -14,3 +14,4 @@ Compression Device Drivers
>      octeontx
>      qat_comp
>      zlib
> +    mlx5

Maintain alphabetical order.

Also fix compilation issues reported by CI
http://mails.dpdk.org/archives/test-report/2021-January/173975.html

There is no information about the installation and how to test this PMD in the documentation.



> diff --git a/doc/guides/compressdevs/mlx5.rst
> b/doc/guides/compressdevs/mlx5.rst
> new file mode 100644
> index 0000000..4ee26b0
> --- /dev/null
> +++ b/doc/guides/compressdevs/mlx5.rst
> @@ -0,0 +1,84 @@
> +.. SPDX-License-Identifier: BSD-3-Clause
> +   Copyright 2021 Mellanox Technologies, Ltd
> +
> +.. include:: <isonum.txt>
> +
> +MLX5 compress driver
> +====================
> +
> +The MLX5 compress driver library
> +(**librte_compress_mlx5**) provides support for **Mellanox BlueField 2**
> +families of 25/50/100/200 Gb/s adapters.
> +
> +Design
> +------
> +
> +This PMD is configuring the compress, decompress amd DMA engines.
> +
> +For security reasons and robustness, this driver only deals with virtual
> +memory addresses. The way resources allocations are handled by the kernel,
> +combined with hardware specifications that allow to handle virtual memory
> +addresses directly, ensure that DPDK applications cannot access random
> +physical memory (or memory that does not belong to the current process).
> +
> +The PMD uses libibverbs and libmlx5 to access the device firmware
> +or directly the hardware components.
> +There are different levels of objects and bypassing abilities
> +to get the best performances:
> +
> +- Verbs is a complete high-level generic API.
> +- Direct Verbs is a device-specific API.
> +- DevX allows to access firmware objects.
> +
> +Enabling librte_compress_mlx5 causes DPDK applications to be linked against
> +libibverbs.
> +
> +Mellanox mlx5 pci device can be probed by number of different pci devices,
> +for example net / vDPA / compress. To select the compress PMD
> ``class=compress``
> +should be specified as device parameter. The compress device can be probed
> and
> +used with other Mellanox classes, by adding more options in the class.
> +For example: ``class=net:compress`` will probe both the net PMD and the
> compress
> +PMD.
> +
> +Features
> +--------
> +
> +Compress mlx5 PMD has support for:
> +
> +Compression/Decompression algorithm:
> +
> +* DEFLATE.
> +
> +NULL algorithm for DMA operations.
> +
> +Huffman code type:
> +
> +* FIXED.
> +* DYNAMIC.
> +
> +Window size support:
> +
> +1KB, 2KB, 4KB, 8KB, 16KB and 32KB.
> +
> +Sharable transformation.
> +
> +Checksum generation:
> +
> +* CRC32, Adler32 and combined checksum.
> +
> +Limitations
> +-----------
> +
> +* Scatter-Gather, SHA and Stateful are not supported.
> +* Non-compressed block is not supported in compress (supported in
> decompress).
> +
> +Supported NICs
> +--------------
> +
> +* Mellanox\ |reg| BlueField 2 SmartNIC
> +
> +Prerequisites
> +-------------
> +
> +- Mellanox OFED version: **5.2**
> +  see :doc:`../../nics/mlx5` guide for more Mellanox OFED details.
> \ No newline at end of file
> diff --git a/doc/guides/rel_notes/release_21_02.rst
> b/doc/guides/rel_notes/release_21_02.rst
> index 706cbf8..f672d7f 100644
> --- a/doc/guides/rel_notes/release_21_02.rst
> +++ b/doc/guides/rel_notes/release_21_02.rst
> @@ -51,6 +51,12 @@ New Features
>       * Other libs
>       * Apps, Examples, Tools (if significant)
> 
> +* **Added mlx5 compress PMD.**
> +
> +  Added a new compress PMD driver for Bluefield 2 adapters.
> +
> +  See the :doc:`../compressdevs/mlx5` for more details.
> +
>       This section is a comment. Do not overwrite or remove it.
>       Also, make sure to start the actual text at the margin.
>       =======================================================
> diff --git a/drivers/compress/mlx5/mlx5_compress.c
> b/drivers/compress/mlx5/mlx5_compress.c
> index d768453..7384351 100644
> --- a/drivers/compress/mlx5/mlx5_compress.c
> +++ b/drivers/compress/mlx5/mlx5_compress.c
> @@ -74,8 +74,28 @@ struct mlx5_compress_qp {
> 
>  int mlx5_compress_logtype;
> 
> -const struct rte_compressdev_capabilities
> mlx5_caps[RTE_COMP_ALGO_LIST_END];
> -
> +static const struct rte_compressdev_capabilities mlx5_caps[] = {
> +	{
> +		.algo = RTE_COMP_ALGO_NULL,
> +		.comp_feature_flags = RTE_COMP_FF_ADLER32_CHECKSUM |
> +				      RTE_COMP_FF_CRC32_CHECKSUM |
> +
> RTE_COMP_FF_CRC32_ADLER32_CHECKSUM |
> +				      RTE_COMP_FF_SHAREABLE_PRIV_XFORM,
> +	},
> +	{
> +		.algo = RTE_COMP_ALGO_DEFLATE,
> +		.comp_feature_flags = RTE_COMP_FF_ADLER32_CHECKSUM |
> +				      RTE_COMP_FF_CRC32_CHECKSUM |
> +
> RTE_COMP_FF_CRC32_ADLER32_CHECKSUM |
> +				      RTE_COMP_FF_SHAREABLE_PRIV_XFORM |
> +				      RTE_COMP_FF_HUFFMAN_FIXED |
> +				      RTE_COMP_FF_HUFFMAN_DYNAMIC,
> +		.window_size = {.min = 10, .max = 15, .increment = 1},
> +	},
> +	{
> +		.algo = RTE_COMP_ALGO_LIST_END,
> +	}
> +};
> 
>  static void
>  mlx5_compress_dev_info_get(struct rte_compressdev *dev,
> --
> 1.8.3.1