linux-kernel - PCI Endpoint - Missing inbound mapping ops ?

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Message-ID: <CA+Kvs9kZKt0tvsB-YqomM7grvRyDr=B-HPWUNv1ZcKi8w9ms-A@mail.gmail.com>
Date:   Tue, 14 Aug 2018 13:49:20 +0100
From:   Ramon Fried <ramon.fried@...il.com>
To:     kishon@...com, lorenzo.pieralisi@....com, bhelgaas@...gle.com,
        linux-pci@...r.kernel.org, open list <linux-kernel@...r.kernel.org>
Subject: PCI Endpoint - Missing inbound mapping ops ?

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.

Thanks !
Ramon.