FSL MSI Mapping

8 messages, 4 authors, 2014-11-03 · open the first message on its own page

FSL MSI Mapping

From: Johannes Thumshirn <hidden>
Date: 2014-10-28 17:06:17

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

Re: FSL MSI Mapping

From: Scott Wood <hidden>
Date: 2014-10-28 19:10:35

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

Re: FSL MSI Mapping

From: Johannes Thumshirn <hidden>
Date: 2014-10-29 07:01:23

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:
quoted
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

Re: FSL MSI Mapping

From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2014-10-30 03:51:59

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

Re: FSL MSI Mapping

From: Johannes Thumshirn <hidden>
Date: 2014-10-30 07:05:17

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:
quoted
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.

Re: FSL MSI Mapping

From: Johannes Thumshirn <hidden>
Date: 2014-10-31 08:12:36

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:
quoted
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?

Re: FSL MSI Mapping

From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: 2014-10-31 11:28:28

On 10/31/2014 09:12 AM, Johannes Thumshirn wrote:
On Thu, Oct 30, 2014 at 02:51:57PM +1100, Michael Ellerman wrote:
quoted
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

Re: FSL MSI Mapping

From: Scott Wood <hidden>
Date: 2014-11-03 21:57:34

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:
quoted
On Tue, 2014-10-28 at 18:06 +0100, Johannes Thumshirn wrote:
quoted
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
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