tree bca4a0a51a7b9563f59aea0cd1fffc309eeaf753
parent e3682b6c1c14c8ad2253a3e5d19fb7dfe417c018
author Kyösti Mälkki <kyosti.malkki@gmail.com> 1526801483 +0300
committer Kyösti Mälkki <kyosti.malkki@gmail.com> 1546604082 +0000

device: Introduce pcidev_on_root() and friends

Semantics of dev_find_slot() are ill in the sense that
it only works after device enumeration has completed in
ramstage. Plan is to declare it as deprecated.

Introduce pcidev_on_root() and pcidev_path_on_root()
functions to replace cases where this was called with
static argument bus == 0. New implementation only walks
the root bus of the PCI tree, while old one walked
the entire linked list of devices.

Introduce pcidev_path_behind() to replace cases where
argument bus != 0. The required parent node is typically
one of the PCIe root functions that you locate using
pcidev_on_root() above.

New forms are safe to use with early devicetree and
before PCI bus numbers have been assigned.

Change-Id: Ie20598d48b4cf6e35e45fc90804bad4728437fc6
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/26447
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>