Re: PCIe support for ARM64

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On Fri, Jun 19, 2015 at 12:43 AM, ravikiran gummaluri
<rgummal@xxxxxxxxxx> wrote:
> HI
>
> I am developing PCIe root port driver for Xilinx device. We have used
> following patch for ARM64 bit support
> "https://lkml.org/lkml/2014/7/3/764";. The link explains it as temporary
> patch and main line will be updated soon with those changes. We have not
> seen the changes till now. Can you let us know when we can expect the
> changes in mainline? We are planning to push our drivers to mainline.

There is PCI support for ARM64 in mainline:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d1e6dc91b532

There is also a Xilinx driver already:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/host/pcie-xilinx.c

I don't know if your device is similar to the AXI device, but it would
be good if you can share or modify that driver instead of adding a new
one.

As with several other drivers, the current pcie-xilinx.c uses
pci_common_init_dev(), so it only works on ARM (not ARM64).  This is a
known issue, and people are working on making these drivers less
arch-specific.

Bjorn
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