From: John Garry <john.garry@huawei.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: JBottomley@odin.com, martin.petersen@oracle.com,
robh+dt@kernel.org, pawel.moll@arm.com,
ijc+devicetree@hellion.org.uk, galak@codeaurora.org,
linuxarm@huawei.com, zhangfei.gao@linaro.org,
xuwei5@hisilicon.com, john.garry2@mail.dcu.ie,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
arnd@arndb.de, devicetree@vger.kernel.org
Subject: Re: [PATCH 01/23] devicetree: bindings: hisi_sas: add v2 HW bindings
Date: Fri, 8 Jan 2016 15:34:37 +0000 [thread overview]
Message-ID: <568FD70D.1090303@huawei.com> (raw)
In-Reply-To: <20160108151934.GA32692@leverpostej>
>>>> +Optional main node properties:
>>>> + - am-max-trans : limit controller for am max transmissions
>>>
>>> Is this a boolean? Number?
>>>
>>
>> This is a boolean. It is for dealing with a quirk in the chipset: an
>> instance of the controller in the hip06 chipset requires registers
>> set with a different init value.
>
> Ok. I think the property at needs a better description for that.
>
> It's not clear to me how "limit controller for am max transmissions"
> maps to writing a specific value to some registers, but I don't know
> much about SAS.
>
> Is this some well-known thing, or values specific to hip06?
>
> Thanks,
> Mark.
>
This is a specific issue for hip06 chipset. There is a bug in the HW on
hip06 where controller #1 has to set to 2 registers to non-default
values to limit "am-max-transmissions". This would not be a common
SAS/SCSI controller property and is specific to our HW.
Thanks,
John
next prev parent reply other threads:[~2016-01-08 15:34 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-08 14:15 [PATCH 00/23] HiSilicon SAS v2 hw support John Garry
2016-01-08 14:15 ` [PATCH 01/23] devicetree: bindings: hisi_sas: add v2 HW bindings John Garry
[not found] ` <1452262542-64589-2-git-send-email-john.garry-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2016-01-08 14:52 ` Mark Rutland
2016-01-08 15:15 ` John Garry
2016-01-08 15:19 ` Mark Rutland
2016-01-08 15:34 ` John Garry [this message]
2016-01-08 16:49 ` Mark Rutland
2016-01-11 14:00 ` John Garry
[not found] ` <5693B59A.6000705-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2016-01-12 12:16 ` John Garry
2016-01-08 14:15 ` [PATCH 03/23] hisi_sas: set max commands as configurable John Garry
2016-01-08 14:15 ` [PATCH 04/23] hisi_sas: reduce max itct entries John Garry
2016-01-08 14:15 ` [PATCH 05/23] hisi_sas: add hisi_sas_err_record_v1 John Garry
2016-01-08 14:15 ` [PATCH 06/23] hisi_sas: rename some fields in hisi_sas_itct John Garry
2016-01-08 14:15 ` [PATCH 07/23] hisi_sas: add bare v2 hw driver John Garry
2016-01-08 14:15 ` [PATCH 08/23] hisi_sas: add v2 register definitions John Garry
2016-01-08 14:15 ` [PATCH 10/23] hisi_sas: add init_id_frame_v2_hw() John Garry
2016-01-08 14:15 ` [PATCH 11/23] hisi_sas: add v2 phy init code John Garry
2016-01-08 14:15 ` [PATCH 12/23] hisi_sas: add v2 int init and phy up handler John Garry
[not found] ` <1452262542-64589-1-git-send-email-john.garry-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2016-01-08 14:15 ` [PATCH 02/23] hisi_sas: relocate DEV_IS_EXPANDER John Garry
2016-01-08 14:15 ` [PATCH 09/23] hisi_sas: add v2 hw init John Garry
2016-01-08 15:07 ` Mark Rutland
2016-01-08 14:15 ` [PATCH 13/23] hisi_sas: add v2 phy down handler John Garry
2016-01-08 14:15 ` [PATCH 18/23] hisi_sas: add v2 code to send smp command John Garry
2016-01-08 14:15 ` [PATCH 20/23] hisi_sas: add v2 path to send ATA command John Garry
2016-01-08 14:31 ` [PATCH 00/23] HiSilicon SAS v2 hw support John Garry
2016-01-08 14:15 ` [PATCH 14/23] hisi_sas: add v2 channel interrupt handler John Garry
2016-01-08 14:15 ` [PATCH 15/23] hisi_sas: add v2 SATA " John Garry
2016-01-08 14:15 ` [PATCH 16/23] hisi_sas: add v2 cq " John Garry
2016-01-08 17:29 ` kbuild test robot
2016-01-08 14:15 ` [PATCH 17/23] hisi_sas: add v2 path to send ssp frame John Garry
2016-01-08 14:15 ` [PATCH 19/23] hisi_sas: add v2 code for itct setup and free John Garry
2016-01-08 14:15 ` [PATCH 21/23] hisi_sas: add v2 slot error handler John Garry
2016-01-08 14:15 ` [PATCH 22/23] hisi_sas: add v2 tmf functions John Garry
2016-01-08 14:15 ` [PATCH 23/23] hisi_sas: update driver version to 1.1 John Garry
2016-01-11 13:43 ` [PATCH 00/23] HiSilicon SAS v2 hw support Hannes Reinecke
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