PCI IO memory resource allocation

[Erlon Cruz]

You should have a look in Linux Device Drivers, Cap. 9, and Cap. 12.


On Thu, Aug 18, 2011 at 1:04 PM, J.Hwan.Kim <j.hwan.kim99 at gmail.com> wrote:

> On 2011년 08월 18일 15:01, Vladimir Murzin wrote:
> > On Wed, Aug 17, 2011 at 3:33 PM, J.Hwan Kim<frog1120 at gmail.com>  wrote:
> >> Hi, everyone
> >>
> >> In kernel source, where is the PCI IO memory resource allocation is
> done?
> >> (memory mapped io)
> >>
> >> And can you explain the IO memory resource allocation mechanism?
> >>
> >> Thanks in advance
> >>
> >> Best Regards,
> >>
> >> J.Hwan Kim
>
> > Hi J.Hwan,
> >
> > Have you tried reading some books like Linux Device Drivers by
> > Jonathan Corbet, Alessandro
> > Rubini, and Greg Kroah-Hartman? In mentioned book there is a chapter
> > dedicated to PCI subsystem.
> >
>
> Thank you for reply.
>
> As far as I know, the PCI mem resouces are allocated mainly by BIOS on
> Intel based system, but they can also be allocated by linux kernel
> according to boot command option.
> I tried to find the routine in kernel source directory, but it was not
> easy to find it.
>
> I want to find the source code in which linux kernel allocates the I/O
> memory for PCI device.
> I had a problem in my pci device which uses SR-IOV function indicates that
> the MMIO is allocated in sufficiently and my BIOS is old version,
> so I hope to solve the problem using the linux kerenl for allocating the
> I/O mem
> for the pci device and to know where the source code is for that.
>
> Best Regards,
> J.Hwan Kim
>
>
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