[PATCH 2/2] powerpc: Add IPIC MSI support
Li Li
r64360 at freescale.com
Fri Dec 14 20:13:47 EST 2007
On Fri, 2007-12-14 at 16:52 +0800, Kumar Gala wrote:
>
> On Dec 14, 2007, at 2:47 AM, Li Tony wrote:
>
> >
> > Hi,
> >
> > I think it is possible to make common code to support both IPIC
> and
> > MPIC.
> > Currently, the MPIC has already implemented MSI which is different
> > from IPIC and embedded into the mpic code body.
> > If want to unifiy MSI code, we need to remove the current MPIC MSI
> > implementation.
>
> The MPIC is going to have to support several MSI styles (IBM/U3,
> PaSemi, and FSL) since we all seem to handle it differently.
>
Yes, you are right. I misunderstands here.
> > Micheal, what is your opinion ??
> >
> > Jin is working on 86xx msi now.
>
> What PCIe cards are you using to test MSIs?
>
Intel PRO1000 PCIE network card and SysKonnect card.
> - k
>
> >> -----Original Message-----
> >> From: Kumar Gala [mailto:galak at kernel.crashing.org]
> >> Sent: 2007年12月14日 13:45
> >> To: Li Tony
> >> Cc: Phillips Kim; michael at ellerman.id.au; linuxppc-dev
> >> Subject: Re: [PATCH 2/2] powerpc: Add IPIC MSI support
> >>
> >>
> >> On Dec 4, 2007, at 4:39 AM, Li Li wrote:
> >>
> >>> Modified based on discussion on list.
> >>>
> >>> 1. Adopt virq_to_hw routine
> >>> 2. Correct a legacy bug
> >>>
> >>> Implements the IPIC MSI as two level interrupt controller.
> >>>
> >>> Signed-off-by: Tony Li <tony.li at freescale.com>
> >>
> >> Tony, have you looked at the 85xx/86xx PCIe MSI mechanism?
> >> The 2nd level PIC handling seems like its pretty similar
> >> between IPIC and MPIC. Would like to see if we could somehow
> >> make the code common for to handle MSIs from both?
> >>
> >> - k
> >>
>
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