Re: [dpdk-dev] [PATCH v3 3/3] doc: update ISA-L guide to reflect checksum support

["Varghese, Vipin" <vipin.varghese@intel.com>]

Thanks Lee for understanding

> -----Original Message-----
> From: Daly, Lee
> Sent: Monday, January 7, 2019 4:07 PM
> To: Varghese, Vipin <vipin.varghese@intel.com>; akhil.goyal@nxp.com
> Cc: dev@dpdk.org
> Subject: RE: [dpdk-dev] [PATCH v3 3/3] doc: update ISA-L guide to reflect
> checksum support
> 
> Hi Vipin, thanks for your suggestion.
> I will send another version with the change.
> /Lee.
> 
> > -----Original Message-----
> > From: Varghese, Vipin
> > Sent: Friday, December 28, 2018 5:05 AM
> > To: Daly, Lee <lee.daly@intel.com>; akhil.goyal@nxp.com
> > Cc: dev@dpdk.org; Daly, Lee <lee.daly@intel.com>
> > Subject: RE: [dpdk-dev] [PATCH v3 3/3] doc: update ISA-L guide to
> > reflect checksum support
> >
> > Hi Lee,
> >
> > A humble suggestion being shared for document update, Based on DPDK
> > 19.02-rc1 release both code and associated document update is to be in
> > single patch file.
> >
> > Note: I am not fully sure how this is applicable to 'isal.ini and
> > isal.rst'. It will be good to have a check.
> >
> > Thanks
> > Vipin Varghese
> >
> > > -----Original Message-----
> > > From: dev <dev-bounces@dpdk.org> On Behalf Of Lee Daly
> > > Sent: Thursday, December 13, 2018 4:13 PM
> > > To: akhil.goyal@nxp.com
> > > Cc: dev@dpdk.org; Daly, Lee <lee.daly@intel.com>
> > > Subject: [dpdk-dev] [PATCH v3 3/3] doc: update ISA-L guide to
> > > reflect checksum support
> > >
> > > 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
> > >
> > > Signed-off-by: Lee Daly <lee.daly@intel.com>
> > > Acked-by: Fiona Trahe <fiona.trahe@intel.com>
> > > ---
> > >  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