/* $NetBSD: pci_bootdev.c,v 1.1 2025/03/09 01:06:42 thorpej Exp $ */
/*
* Copyright (c) 1995, 1996, 1997 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or
[email protected]
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: pci_bootdev.c,v 1.1 2025/03/09 01:06:42 thorpej Exp $");
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/alpha.h>
#include <machine/autoconf.h>
#include <dev/ata/atavar.h>
#include <dev/pci/pcivar.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/ic/mlxio.h> /* XXX */
#include <dev/ic/mlxvar.h> /* XXX */
#include <dev/i2o/i2o.h> /* XXX */
#include <dev/i2o/iopio.h> /* XXX */
#include <dev/i2o/iopvar.h> /* XXX */
#define DPRINTF(x) if (bootdev_debug) printf x
void
pci_find_bootdev(device_t hosedev, device_t dev, void *aux)
{
static device_t pcidev, ctrlrdev;
struct bootdev_data *b = bootdev_data;
device_t parent = device_parent(dev);
if (booted_device != NULL || b == NULL) {
return;
}
if (pcidev == NULL) {
if (device_is_a(dev, "pci")) {
struct pcibus_attach_args *pba = aux;
/*
* If a hose device was specified, ensure that
* this PCI instance has that device as an ancestor.
*/
if (hosedev) {
while (parent) {
if (parent == hosedev) {
break;
}
parent = device_parent(parent);
}
if (!parent) {
return;
}
}
if ((b->slot / 1000) == pba->pba_bus) {
pcidev = dev;
DPRINTF(("\npcidev = %s\n", device_xname(dev)));
}
}
return;
}
if (ctrlrdev == NULL) {
if (parent == pcidev) {
struct pci_attach_args *pa = aux;
int slot = pa->pa_bus * 1000 + pa->pa_function * 100 +
pa->pa_device;
if (b->slot == slot) {
if (bootdev_is_net) {
goto foundit;
} else {
ctrlrdev = dev;
DPRINTF(("\nctrlrdev = %s\n",
device_xname(dev)));
}
}
}
return;
}
if (!bootdev_is_disk) {
return;
}
if (device_is_a(dev, "sd") ||
device_is_a(dev, "st") ||
device_is_a(dev, "cd")) {
struct scsipibus_attach_args *sa = aux;
struct scsipi_periph *periph = sa->sa_periph;
int unit;
if (device_parent(parent) != ctrlrdev) {
return;
}
unit = periph->periph_target * 100 + periph->periph_lun;
if (b->unit != unit ||
b->channel != periph->periph_channel->chan_channel) {
return;
}
goto foundit;
}
if (device_is_a(dev, "wd")) {
struct ata_device *adev = aux;
if (!device_is_a(parent, "atabus")) {
return;
}
if (device_parent(parent) != ctrlrdev) {
return;
}
DPRINTF(("\natapi info: drive %d, channel %d\n",
adev->adev_drv_data->drive, adev->adev_channel));
DPRINTF(("bootdev info: unit: %d, channel: %d\n",
b->unit, b->channel));
if (b->unit != adev->adev_drv_data->drive ||
b->channel != adev->adev_channel) {
return;
}
goto foundit;
}
if (device_is_a(dev, "ld")) {
/*
* XXX Attach arguments for ld devices is not consistent,
* XXX so we have to special-case each supported RAID
* XXX controller.
*/
if (parent != ctrlrdev) {
return;
}
if (device_is_a(parent, "mlx")) {
struct mlx_attach_args *mlxa = aux;
if (b->unit != mlxa->mlxa_unit) {
return;
}
goto foundit;
}
if (device_is_a(parent, "iop")) {
struct iop_attach_args *iopa = aux;
if (b->unit != iopa->ia_tid) {
return;
}
goto foundit;
}
}
return;
foundit:
booted_device = dev;
DPRINTF(("\nbooted_device = %s\n", device_xname(dev)));
}
