linux-kernel - Re: [PATCH] sata_nv: sgpio for nvidia mcp55 -v3

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Date:	Mon, 13 Apr 2009 08:50:28 -0700
From:	Yinghai Lu <yhlu.kernel@...il.com>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Peer Chen <pchen@...dia.com>, Kuan Luo <kluo@...dia.com>,
	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] sata_nv: sgpio for nvidia mcp55 -v3

On Mon, Apr 13, 2009 at 1:18 AM, Jeff Garzik <jeff@...zik.org> wrote:
> Yinghai Lu wrote:
>>
>> Impact: new features
>>
>> based on patch on
>>    http://marc.info/?l=linux-ide&m=116289338705418&w=2
>>
>> 1. update the patch for 2.6.19 to latest upstream ( 2.6.28?)
>> 2. fix shared sgpio to support several mcp55 + io55, so every mcp55 have
>>   seperate spinlock
>> 3. use scratch_source as numbering of sgpio instead of address of struct,
>>   so could go through kexec/kdump
>>
>> v2: revert NV_ON and NV_OFF, so turn on Activity LED all the time when
>> disk is idle.
>> v3: use one timer per sgpio instead of per nv_host, so for mcp55+io55
>> system will use 2 timers
>>    instead of 6 timers.
>>
>> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>>
>> ---
>>  drivers/ata/sata_nv.c |  562
>> ++++++++++++++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 562 insertions(+)
>
>
> Is this really over 500 LOC, just to blink some lights from the data xfer
> hot path?  :)
>
there is timer to blink the activity led. per sgpio, normally one for
mcp55 and one for io55.
data xfer hot path only set some status.

YH
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