From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by dpdk.org (Postfix) with ESMTP id 53E291B9E2 for ; Fri, 14 Dec 2018 10:59:32 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Dec 2018 01:59:31 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,352,1539673200"; d="scan'208";a="110349980" Received: from silpixa00399501.ir.intel.com ([10.237.223.69]) by orsmga003.jf.intel.com with ESMTP; 14 Dec 2018 01:59:30 -0800 From: Lee Daly To: akhil.goyal@nxp.com Cc: dev@dpdk.org, Lee Daly Date: Fri, 14 Dec 2018 09:59:24 +0000 Message-Id: <1544781564-63598-3-git-send-email-lee.daly@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1544781564-63598-1-git-send-email-lee.daly@intel.com> References: <11544697752-156863-1-git-send-email-lee.daly@intel.com> <1544781564-63598-1-git-send-email-lee.daly@intel.com> Subject: [dpdk-dev] [PATCH v4 3/3] doc: update ISA-L guide to reflect checksum support X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Dec 2018 09:59:33 -0000 This updates the ISA-L compression driver guide on how to enable and use checksums. This also updates the compression drivers features matrix. V2: Documentation Changes V3: Added Release note V4: Removed depedency on offset unit test Signed-off-by: Lee Daly Acked-by: Fiona Trahe --- doc/guides/compressdevs/features/isal.ini | 2 ++ doc/guides/compressdevs/isal.rst | 30 ++++++++++++++++++++++++++++-- doc/guides/rel_notes/release_19_02.rst | 5 +++++ 3 files changed, 35 insertions(+), 2 deletions(-) diff --git a/doc/guides/compressdevs/features/isal.ini b/doc/guides/compressdevs/features/isal.ini index 919cf70..e705031 100644 --- a/doc/guides/compressdevs/features/isal.ini +++ b/doc/guides/compressdevs/features/isal.ini @@ -12,5 +12,7 @@ OOP SGL In SGL Out = Y OOP SGL In LB Out = Y OOP LB In SGL Out = Y Deflate = Y +Adler32 = Y +Crc32 = Y Fixed = Y Dynamic = Y diff --git a/doc/guides/compressdevs/isal.rst b/doc/guides/compressdevs/isal.rst index 3bc3022..af1f41f 100644 --- a/doc/guides/compressdevs/isal.rst +++ b/doc/guides/compressdevs/isal.rst @@ -27,6 +27,33 @@ Window size support: * 32K +Checksum: + + * CRC32 + * ADLER32 + +To enable a checksum in the driver, the compression and/or decompression xform +structure, rte_comp_xform, must be filled with either of the CompressDev +checksum flags supported. :: + + compress_xform->compress.chksum = RTE_COMP_CHECKSUM_CRC32 + + decompress_xform->decompress.chksum = RTE_COMP_CHECKSUM_CRC32 + +:: + + compress_xform->compress.chksum = RTE_COMP_CHECKSUM_ADLER32 + + decompress_xform->decompress.chksum = RTE_COMP_CHECKSUM_ADLER32 + +If you request a checksum for compression or decompression, +the checksum field in the operation structure, ``op->output_chksum``, +will be filled with the checksum. + +.. Note:: + + For the compression case above, your output buffer will need to be large enough to hold the compressed data plus a scratchpad for the checksum at the end, the scratchpad is 8 bytes for CRC32 and 4 bytes for Adler32. + Level guide: The ISA-L levels have been mapped to somewhat correspond to the same ZLIB level, @@ -75,13 +102,12 @@ As a result the level mappings from the API to the PMD are shown below. The above table only shows mapping when API calls for dynamic compression. For fixed compression, regardless of API level, internally ISA-L level 0 is always used. + Limitations ----------- * Compressdev level 0, no compression, is not supported. -* Checksums will not be supported until future release. - Installation ------------ diff --git a/doc/guides/rel_notes/release_19_02.rst b/doc/guides/rel_notes/release_19_02.rst index a94fa86..3a4d264 100644 --- a/doc/guides/rel_notes/release_19_02.rst +++ b/doc/guides/rel_notes/release_19_02.rst @@ -54,6 +54,11 @@ New Features Also, make sure to start the actual text at the margin. ========================================================= + * **Enabled checksum support in the ISA-L compressdev driver.** + + Added support for both adler and crc32 checksums in the ISA-L PMD. + This aids data integrity across both compression and decompression. + Removed Items ------------- -- 2.7.4