* FSL MSI Mapping
@ 2014-10-28 17:06 Johannes Thumshirn
2014-10-28 19:10 ` Scott Wood
2014-10-30 3:51 ` Michael Ellerman
0 siblings, 2 replies; 8+ messages in thread
From: Johannes Thumshirn @ 2014-10-28 17:06 UTC (permalink / raw)
To: Sebastian Andrzej Siewior; +Cc: linuxppc-dev, 'David Engster'
Hi,
I got notified about your patch to support multiple MSI Vectors on Freescale
PowerPC platforms. Is there any reason why it wasn't applied until now? I
couldn't find anything about it in the list archives.
I think it would be a real benefit for all to have multiple MSI vecotrs on
PowerPCs.
Thanks in advance,
Johannes
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: FSL MSI Mapping
2014-10-28 17:06 FSL MSI Mapping Johannes Thumshirn
@ 2014-10-28 19:10 ` Scott Wood
2014-10-29 6:54 ` Johannes Thumshirn
2014-10-30 3:51 ` Michael Ellerman
1 sibling, 1 reply; 8+ messages in thread
From: Scott Wood @ 2014-10-28 19:10 UTC (permalink / raw)
To: Johannes Thumshirn
Cc: Sebastian Andrzej Siewior, linuxppc-dev, 'David Engster'
On Tue, 2014-10-28 at 18:06 +0100, Johannes Thumshirn wrote:
> Hi,
>
> I got notified about your patch to support multiple MSI Vectors on Freescale
> PowerPC platforms. Is there any reason why it wasn't applied until now? I
> couldn't find anything about it in the list archives.
>
> I think it would be a real benefit for all to have multiple MSI vecotrs on
> PowerPCs.
Could you provide a patchwork link to the patch you're talking about?
-Scott
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: FSL MSI Mapping
2014-10-28 19:10 ` Scott Wood
@ 2014-10-29 6:54 ` Johannes Thumshirn
2014-11-03 21:57 ` Scott Wood
0 siblings, 1 reply; 8+ messages in thread
From: Johannes Thumshirn @ 2014-10-29 6:54 UTC (permalink / raw)
To: Scott Wood
Cc: Johannes Thumshirn, Sebastian Andrzej Siewior, linuxppc-dev,
'David Engster'
On Tue, Oct 28, 2014 at 02:10:18PM -0500, Scott Wood wrote:
> On Tue, 2014-10-28 at 18:06 +0100, Johannes Thumshirn wrote:
> > Hi,
> >
> > I got notified about your patch to support multiple MSI Vectors on Freescale
> > PowerPC platforms. Is there any reason why it wasn't applied until now? I
> > couldn't find anything about it in the list archives.
> >
> > I think it would be a real benefit for all to have multiple MSI vecotrs on
> > PowerPCs.
>
> Could you provide a patchwork link to the patch you're talking about?
Unfortunately I couldn't find it in the ppc patchwork, but here are the links to
the patch series in the list archives:
https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-February/115484.html
https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-February/115485.html
https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-February/115486.html
Thanks,
Johannes
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: FSL MSI Mapping
2014-10-28 17:06 FSL MSI Mapping Johannes Thumshirn
2014-10-28 19:10 ` Scott Wood
@ 2014-10-30 3:51 ` Michael Ellerman
2014-10-30 6:58 ` Johannes Thumshirn
2014-10-31 8:12 ` Johannes Thumshirn
1 sibling, 2 replies; 8+ messages in thread
From: Michael Ellerman @ 2014-10-30 3:51 UTC (permalink / raw)
To: Johannes Thumshirn
Cc: Sebastian Andrzej Siewior, linuxppc-dev, 'David Engster'
On Tue, 2014-10-28 at 18:06 +0100, Johannes Thumshirn wrote:
> Hi,
>
> I got notified about your patch to support multiple MSI Vectors on Freescale
> PowerPC platforms. Is there any reason why it wasn't applied until now? I
> couldn't find anything about it in the list archives.
>
> I think it would be a real benefit for all to have multiple MSI vecotrs on
> PowerPCs.
Why would you not use MSI-X ?
cheers
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: FSL MSI Mapping
2014-10-30 3:51 ` Michael Ellerman
@ 2014-10-30 6:58 ` Johannes Thumshirn
2014-10-31 8:12 ` Johannes Thumshirn
1 sibling, 0 replies; 8+ messages in thread
From: Johannes Thumshirn @ 2014-10-30 6:58 UTC (permalink / raw)
To: Michael Ellerman
Cc: Johannes Thumshirn, Sebastian Andrzej Siewior, linuxppc-dev,
'David Engster'
On Thu, Oct 30, 2014 at 02:51:57PM +1100, Michael Ellerman wrote:
> On Tue, 2014-10-28 at 18:06 +0100, Johannes Thumshirn wrote:
> > Hi,
> >
> > I got notified about your patch to support multiple MSI Vectors on Freescale
> > PowerPC platforms. Is there any reason why it wasn't applied until now? I
> > couldn't find anything about it in the list archives.
> >
> > I think it would be a real benefit for all to have multiple MSI vecotrs on
> > PowerPCs.
>
> Why would you not use MSI-X ?
>
Simply because our hardware only supports MSI.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: FSL MSI Mapping
2014-10-30 3:51 ` Michael Ellerman
2014-10-30 6:58 ` Johannes Thumshirn
@ 2014-10-31 8:12 ` Johannes Thumshirn
2014-10-31 11:28 ` Sebastian Andrzej Siewior
1 sibling, 1 reply; 8+ messages in thread
From: Johannes Thumshirn @ 2014-10-31 8:12 UTC (permalink / raw)
To: Michael Ellerman, Sebastian Andrzej Siewior
Cc: Johannes Thumshirn, linuxppc-dev, 'David Engster'
On Thu, Oct 30, 2014 at 02:51:57PM +1100, Michael Ellerman wrote:
> On Tue, 2014-10-28 at 18:06 +0100, Johannes Thumshirn wrote:
> > Hi,
> >
> > I got notified about your patch to support multiple MSI Vectors on Freescale
> > PowerPC platforms. Is there any reason why it wasn't applied until now? I
> > couldn't find anything about it in the list archives.
> >
> > I think it would be a real benefit for all to have multiple MSI vecotrs on
> > PowerPCs.
>
> Why would you not use MSI-X ?
>
> cheers
>
>
Does anyone (especially the original author) have any objections if I re-spin
the patch series?
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: FSL MSI Mapping
2014-10-31 8:12 ` Johannes Thumshirn
@ 2014-10-31 11:28 ` Sebastian Andrzej Siewior
0 siblings, 0 replies; 8+ messages in thread
From: Sebastian Andrzej Siewior @ 2014-10-31 11:28 UTC (permalink / raw)
To: Johannes Thumshirn, Michael Ellerman
Cc: linuxppc-dev, 'David Engster'
On 10/31/2014 09:12 AM, Johannes Thumshirn wrote:
> On Thu, Oct 30, 2014 at 02:51:57PM +1100, Michael Ellerman wrote:
>> Why would you not use MSI-X ?
If I'm not mistaken, a PCI-E requirement is to support MSI but MSI-X is
optional. And with MSI you can have multiple interrupts per single
device (power of two, max 32).
Now imagine you have a FPGA with two (or more) different devices in it
and you don't want them to share the IRQ line (for $reason). I bet the
HW developer sees MSI and MSI-X and the former is for some reason
cheaper compared to MSI-X and it fits the needs. So…
>
> Does anyone (especially the original author) have any objections if I re-spin
> the patch series?
I didn't get around to address the review comments so it did not went
in and there was no v2. Feel free re-do the series.
Sebastian
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: FSL MSI Mapping
2014-10-29 6:54 ` Johannes Thumshirn
@ 2014-11-03 21:57 ` Scott Wood
0 siblings, 0 replies; 8+ messages in thread
From: Scott Wood @ 2014-11-03 21:57 UTC (permalink / raw)
To: Johannes Thumshirn
Cc: Sebastian Andrzej Siewior, linuxppc-dev, 'David Engster'
On Wed, 2014-10-29 at 07:54 +0100, Johannes Thumshirn wrote:
> On Tue, Oct 28, 2014 at 02:10:18PM -0500, Scott Wood wrote:
> > On Tue, 2014-10-28 at 18:06 +0100, Johannes Thumshirn wrote:
> > > Hi,
> > >
> > > I got notified about your patch to support multiple MSI Vectors on Freescale
> > > PowerPC platforms. Is there any reason why it wasn't applied until now? I
> > > couldn't find anything about it in the list archives.
> > >
> > > I think it would be a real benefit for all to have multiple MSI vecotrs on
> > > PowerPCs.
> >
> > Could you provide a patchwork link to the patch you're talking about?
>
> Unfortunately I couldn't find it in the ppc patchwork, but here are the links to
> the patch series in the list archives:
> https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-February/115484.html
> https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-February/115485.html
> https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-February/115486.html
They were in patchwork with changes requested in patch 1/2:
http://patchwork.ozlabs.org/patch/322497/
http://patchwork.ozlabs.org/patch/322334/
-Scott
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2014-11-03 21:57 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-10-28 17:06 FSL MSI Mapping Johannes Thumshirn
2014-10-28 19:10 ` Scott Wood
2014-10-29 6:54 ` Johannes Thumshirn
2014-11-03 21:57 ` Scott Wood
2014-10-30 3:51 ` Michael Ellerman
2014-10-30 6:58 ` Johannes Thumshirn
2014-10-31 8:12 ` Johannes Thumshirn
2014-10-31 11:28 ` Sebastian Andrzej Siewior
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