From: Christian Zigotzky <chzigotzky@xenosoft.de>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-arch@vger.kernel.org, darren@stevens-zone.net,
mad skateman <madskateman@gmail.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
iommu@lists.linux-foundation.org,
Rob Herring <robh+dt@kernel.org>,
paulus@samba.org, rtd2@xtra.co.nz,
"contact@a-eon.com" <contact@a-eon.com>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
nsaenzjulienne@suse.de
Subject: Re: Bug 205201 - Booting halts if Dawicontrol DC-2976 UW SCSI board installed, unless RAM size limited to 3500M
Date: Thu, 21 Nov 2019 13:16:39 +0100 [thread overview]
Message-ID: <dbde2252-035e-6183-7897-43348e60647e@xenosoft.de> (raw)
In-Reply-To: <20191121072943.GA24024@lst.de>
On 21 November 2019 at 08:29 am, Christoph Hellwig wrote:
> On Sat, Nov 16, 2019 at 08:06:05AM +0100, Christian Zigotzky wrote:
>> /*
>> * DMA addressing mode.
>> *
>> * 0 : 32 bit addressing for all chips.
>> * 1 : 40 bit addressing when supported by chip.
>> * 2 : 64 bit addressing when supported by chip,
>> * limited to 16 segments of 4 GB -> 64 GB max.
>> */
>> #define SYM_CONF_DMA_ADDRESSING_MODE CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE
>>
>> Cyrus config:
>>
>> CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=1
>>
>> I will configure “0 : 32 bit addressing for all chips” for the RC8. Maybe this is the solution.
> 0 means you are going to do bounce buffering a lot, which seems
> generally like a bad idea.
>
> But why are we talking about the sym53c8xx driver now? The last issue
> you reported was about video4linux allocations.
>
Both drivers have the same problem. They don't work if we have more than
3.5GB RAM. I try to find a solution until your have a good solution. I
have already a solution for V4L but I still need one for the sym53c8xx
driver.
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next prev parent reply other threads:[~2019-11-21 12:22 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <F1EBB706-73DF-430E-9020-C214EC8ED5DA@xenosoft.de>
2019-11-21 7:29 ` Bug 205201 - Booting halts if Dawicontrol DC-2976 UW SCSI board installed, unless RAM size limited to 3500M Christoph Hellwig
2019-11-21 12:16 ` Christian Zigotzky [this message]
2019-11-21 12:21 ` Christian Zigotzky
2019-11-21 13:33 ` Robin Murphy
2019-11-21 16:34 ` Christian Zigotzky
2019-11-21 18:02 ` Christoph Hellwig
2019-11-21 18:21 ` Christian Zigotzky
2019-11-23 11:42 ` Christian Zigotzky
2019-11-25 7:39 ` Christoph Hellwig
2019-11-25 9:32 ` Mike Rapoport
2019-11-25 16:38 ` Christian Zigotzky
2019-11-26 11:57 ` Christian Zigotzky
2019-11-25 16:36 ` Christian Zigotzky
2019-11-26 11:26 ` Christian Zigotzky
2019-11-26 16:40 ` Christoph Hellwig
2019-11-27 6:56 ` Mike Rapoport
2019-11-27 8:53 ` Christoph Hellwig
2019-11-27 15:14 ` Christian Zigotzky
2019-12-04 8:56 ` Christoph Hellwig
2019-12-04 12:22 ` Christian Zigotzky
2020-01-10 7:10 ` Christian Zigotzky
2020-01-15 15:18 ` Christoph Hellwig
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