On Fri, Jun 26, 2015 at 7:26 AM, Bjorn Helgaas [off-list ref] wrote:

Hi Duc,

On Thu, Jun 25, 2015 at 8:05 PM, Duc Dang [off-list ref] wrote:

quoted

X-Gene PCIe controllers support huge outbound BARs (with size upto
64GB). This patch configures additional 1 outbound BAR for X-Gene
PCIe controllers with size larger than 4GB. This is required to
support devices that request huge outbound memory (nVidia K40 as an
example)

The PCI specs don't use the "outbound BAR" terminology.  I assume this
is what we normally call "windows" or "apertures" for MMIO access by
the CPU?  (The specs rarely use those terms either, but they're
commonly used in Linux, and the PCIe spec does mention them a couple
times.)

Yes, Bjorn. The "outbound BAR" that I mentioned is the MMIO window. I
will change these terms in next patch.

By "request huge outbound memory," I assume you simply mean the device
has a huge BAR, right?

Yes, I meant "the device has a huge BAR". I will change the
description for this in next patch as well

Bjorn

Regards,
Duc Dang.