Re: PCI Endpoint - Missing inbound mapping ops ?

From: Miguel Ojeda
Date: Tue Aug 14 2018 - 09:28:40 EST

Hi Kishon,

On Tue, Aug 14, 2018 at 2:53 PM, Kishon Vijay Abraham I <kishon@xxxxxx> wrote:
> Hi,
> On Tuesday 14 August 2018 06:19 PM, Ramon Fried wrote:
>> Hi.
>> I recently saw that the PCI endpoint API only supports outbound memory
>> mapping: (AXI -> PCI) through the map_addr op.
>> Why inbound mapping is missing (PCI->AXI) is missing ?
>> In almost all of the PCI EP controllers I've worked with there was a
>> need to map complete BARS or part of BARS to mmio/aperature regions on
>> the device.
> pci_epc_set_bar() is used for mapping BAR.

Just to let you know, the ARC/DKIM seems wrong according to gmail and
is marked as spam. It seems it happens from time to time. Bjorn
Helgaas (in CC) also had the same problem a couple of years ago.


> Thanks
> Kishon