/* SPDX-License-Identifier: BSD-2-Clause */
/* PCI Help function, iterate all PCI device children of PCI bus.
*
* COPYRIGHT (c) 2010 Cobham Gaisler AB.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <pci/cfg.h>
/* Iterate over all PCI devices on a bus (not child buses) and call func(),
* iteration is stopped if a non-zero value is returned by func().
*
* search options: 0 (no child buses), 1 (depth first), 2 (breadth first)
*/
int pci_for_each_child(
struct pci_bus *bus,
int (*func)(struct pci_dev *, void *arg),
void *arg,
int search)
{
struct pci_dev *dev = bus->devs;
int ret;
while (dev) {
ret = func(dev, arg);
if (ret)
return ret;
if (search == SEARCH_DEPTH && (dev->flags & PCI_DEV_BRIDGE)) {
ret = pci_for_each_child((struct pci_bus *)dev,
func, arg, search);
if (ret)
return ret;
}
dev = dev->next;
}
return 0;
}