[dpdk-dev] [PATCH v3 11/11] compress/mlx5: add the supported capabilities

[Matan Azrad <matan@nvidia.com>]

Add all the capabilities supported by the device.

Add the driver documentations.

Signed-off-by: Matan Azrad <matan@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
 doc/guides/compressdevs/features/mlx5.ini | 13 +++++
 doc/guides/compressdevs/index.rst         |  1 +
 doc/guides/compressdevs/mlx5.rst          | 94 +++++++++++++++++++++++++++++++
 doc/guides/rel_notes/release_21_02.rst    |  6 ++
 drivers/compress/mlx5/mlx5_compress.c     | 24 +++++++-
 5 files changed, 136 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..54a3ef4 100644
--- a/doc/guides/compressdevs/index.rst
+++ b/doc/guides/compressdevs/index.rst
@@ -11,6 +11,7 @@ Compression Device Drivers
 
     overview
     isal
+    mlx5
     octeontx
     qat_comp
     zlib
diff --git a/doc/guides/compressdevs/mlx5.rst b/doc/guides/compressdevs/mlx5.rst
new file mode 100644
index 0000000..c5433e9
--- /dev/null
+++ b/doc/guides/compressdevs/mlx5.rst
@@ -0,0 +1,94 @@
+.. 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.
+
+GGAs (Generic Global Accelerators) are offload engines that can be used
+to do memory to memory tasks on data.
+These engines are part of the ARM complex of the BlueField chip, and as
+such they do not use NIC related resources (e.g. RX/TX bandwidth).
+They do share the same PCI and memory bandwidth.
+
+So, using the BlueField device (starting from BlueField 2), the compress
+class operations can be supported in parallel to the net, vDPA and
+RegEx class operations.
+
+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 / RegEx. 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.
+
+Shareable 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.
diff --git a/doc/guides/rel_notes/release_21_02.rst b/doc/guides/rel_notes/release_21_02.rst
index ae36b6a..3550f4e 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 f7ef913..a274366 100644
--- a/drivers/compress/mlx5/mlx5_compress.c
+++ b/drivers/compress/mlx5/mlx5_compress.c
@@ -77,8 +77,28 @@ 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