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From: Tomas Henzl <thenzl@redhat.com>
To: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Cc: Suganath prabu Subaramani 
	<suganath-prabu.subramani@avagotech.com>,
	"jejb@kernel.org" <jejb@kernel.org>,
	Christoph Hellwig <hch@infradead.org>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
	Sathya Prakash <Sathya.Prakash@avagotech.com>,
	Kashyap Desai <kashyap.desai@avagotech.com>,
	Krishnaraddi Mankani <krishnaraddi.mankani@avagotech.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Chaitra Basappa <chaitra.basappa@avagotech.com>,
	Sreekanth Reddy <sreekanth.reddy@avagotech.com>
Subject: Re: [mpt3sas driver 07/10] mpt3sas: Add support for configurable Chain Frame Size
Date: Mon, 8 Feb 2016 14:55:13 +0100	[thread overview]
Message-ID: <56B89E41.5090500@redhat.com> (raw)
In-Reply-To: <CAK=zhgpHxib0kcXXRH7o-dRew0aUwFTdAXsLxOun4RZVgsw+Rw@mail.gmail.com>

On 5.2.2016 08:56, Sreekanth Reddy wrote:
> On Thu, Feb 4, 2016 at 8:35 PM, Tomas Henzl <thenzl@redhat.com> wrote:
>> On 28.1.2016 07:37, Suganath prabu Subaramani wrote:
>>> From: Suganath prabu Subramani <suganath-prabu.subramani@avagotech.com>
>>>
>>> Added support for configurable Chain Frame Size. Calculate the
>>> Chain Message Frame size from the IOCMaxChainSegementSize (iocfacts).
>>> Applicable only for mpt3sas/SAS3.0 HBA's.
>>>
>>> Signed-off-by: Suganath prabu Subramani <suganath-prabu.subramani@avagotech.com>
>>> Signed-off-by: Chaitra P B <chaitra.basappa@avagotech.com>
>> Is this done in order to prepare for some future patch, or how  does it work?
>> I noticed only changes in allocation of (probably larger) fields, but
>> how is it actually used ?
> Tomas,
>
> In this patch set we have added new Intruder and Cutlass (high ports)
> PCI devices which are based on MPI26 version.
> In this MPI26 version, Request Frame size is doubled when compared to
> older MPI version, but their is
> no change in the Chain buffer size from MPI26 to older versions. In
> older version Request frame size and
> chain buffer size were same, so in the drivers previously we used to
> use Request Frame size reference for
> Chain buffer size. But we can't use that reference now. So now we are
> determining the chain buffer size from
> IOCFact's IOCMaxChainSegementSize field instead of using the Request
> frame size reference.
>
> ~Sreekanth

Thanks,

Reviewed-by: Tomas Henzl <thenzl@redhat.com>

Tomas

  reply	other threads:[~2016-02-08 13:55 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-28  6:36 [mpt3sas driver patches 00/10] mpt3sas driver enhancements and Suganath prabu Subaramani
2016-01-28  6:36 ` [mpt3sas driver 01/10] mpt3sas: Added support for high port count HBA variants Suganath prabu Subaramani
2016-02-04 14:14   ` Tomas Henzl
2016-02-04 14:14     ` Tomas Henzl
2016-01-28  6:36 ` [mpt3sas driver 02/10] mpt3sas: Used IEEE SGL instead of MPI SGL while framing a SMP Passthrough request message Suganath prabu Subaramani
2016-01-28  9:16   ` Christoph Hellwig
2016-02-04 14:18   ` Tomas Henzl
2016-02-04 14:18     ` Tomas Henzl
2016-01-28  6:37 ` [mpt3sas driver 03/10] mpt3sas: Fix static analyzer(coverity) tool identified defects Suganath prabu Subaramani
2016-02-04 14:18   ` Tomas Henzl
2016-02-04 14:18     ` Tomas Henzl
2016-01-28  6:37 ` [mpt3sas driver 04/10] mpt3sas: Never block the Enclosure device Suganath prabu Subaramani
2016-02-04 14:19   ` Tomas Henzl
2016-02-04 14:19     ` Tomas Henzl
2016-01-28  6:37 ` [mpt3sas driver 05/10] mpt3sas: Make use of additional HighPriority credit message frames for sending SCSI IO's Suganath prabu Subaramani
2016-02-04 14:24   ` Tomas Henzl
2016-02-04 14:24     ` Tomas Henzl
2016-01-28  6:37 ` [mpt3sas driver 06/10] mpt3sas: Added smp_affinity_enable module parameter Suganath prabu Subaramani
2016-02-04 15:01   ` Tomas Henzl
2016-02-04 15:01     ` Tomas Henzl
2016-02-08  6:01     ` Suganath Prabu Subramani
2016-02-08  6:01       ` Suganath Prabu Subramani
2016-02-08 12:38       ` Tomas Henzl
2016-02-08 12:38         ` Tomas Henzl
2016-01-28  6:37 ` [mpt3sas driver 07/10] mpt3sas: Add support for configurable Chain Frame Size Suganath prabu Subaramani
2016-02-04 15:05   ` Tomas Henzl
2016-02-04 15:05     ` Tomas Henzl
2016-02-05  7:56     ` Sreekanth Reddy
2016-02-05  7:56       ` Sreekanth Reddy
2016-02-08 13:55       ` Tomas Henzl [this message]
2016-02-08 13:55         ` Tomas Henzl
2016-01-28  6:37 ` [mpt3sas driver 08/10] mpt3sas: Updated MPI Header to 2.00.42 Suganath prabu Subaramani
2016-02-04 15:06   ` Tomas Henzl
2016-02-04 15:06     ` Tomas Henzl
2016-01-28  6:37 ` [mpt3sas driver 09/10] mpt3sas: Fix for Asynchronous completion of timedout IO and task abort of timedout IO Suganath prabu Subaramani
2016-02-04 15:07   ` Tomas Henzl
2016-02-04 15:07     ` Tomas Henzl
2016-01-28  6:37 ` [mpt3sas driver 10/10] mpt3sas: Updating mpt3sas driver version to 12.100.00.00 Suganath prabu Subaramani
2016-02-04 15:08   ` Tomas Henzl
2016-02-04 15:08     ` Tomas Henzl
2016-02-05  2:04 ` [mpt3sas driver patches 00/10] mpt3sas driver enhancements and Martin K. Petersen
2016-02-10 17:20 ` Martin K. Petersen

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