/* SPDX-License-Identifier: BSD-2-Clause */
/* PCI Help Function, iterate over all PCI devices. Find devices by cfg access.
*
* 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.h>
#include <pci/access.h>
/*#define DEBUG*/
#ifdef DEBUG
#include <rtems/bspIo.h>
#define DBG(args...) printk(args)
#else
#define DBG(args...)
#endif
int pci_for_each(int (*func)(pci_dev_t, void*), void *arg)
{
uint32_t id;
uint8_t hd;
int bus, dev, fun, result, fail;
int maxbus = pci_bus_count();
pci_dev_t pcidev;
for (bus = 0; bus < maxbus ; bus++) {
for (dev = 0; dev <= PCI_SLOTMAX; dev++) {
pcidev = PCI_DEV(bus, dev, 0);
for (fun = 0; fun <= PCI_FUNCMAX; fun++, pcidev++) {
fail = pci_cfg_r32(pcidev, PCIR_VENDOR, &id);
if (fail || (0xffffffff == id) || (0 == id)) {
if (fun == 0)
break;
else
continue;
}
DBG("pcibus_for_each: found 0x%08lx at"
" %d/%d/%d\n", id, bus, dev, fun);
result = func(pcidev, arg);
if (result != 0)
return result; /* Stopped */
/* Stop if not a multi-function device */
if (fun == 0) {
pci_cfg_r8(pcidev, PCIR_HDRTYPE,
&hd);
if ((hd & PCIM_MFDEV) == 0)
break;
}
}
}
}
return 0; /* scanned all */
}
