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/*-
* Copyright (c) 1999 Andrew Gallatin
* All rights reserved.
*
* 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 AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/md_var.h>
#include <sys/rman.h>
#include <pci/pcivar.h>
#include <alpha/pci/tsunamireg.h>
#include <alpha/pci/tsunamivar.h>
static devclass_t pcib_devclass;
int tsunami_hoses[TSUNAMI_MAXHOSES+1] = {1,-1,-1,-1,-1};
int tsunami_maxhoseno = 0;
extern int tsunami_num_pchips;
/*
* This comment attempts to explain why and how we are mapping from
* the DEQ assigned bus numbers to the FreeBSD assigned numbers.
*
* FreeBSD must number buses with monotonically increasing numbers for a
* variety of reasons (pciconf, newbus, etc).
*
* DEQ numbers them (from what I can tell) on a per-hose bases. And
* for some reason they seem to always leave bus 1 unused.
*
* When generating config space addrs, we need to know if we are
* directly on the primary bus on that hose, or if we are behind a ppb.
* We keep track of this by assigning hoses monotonically increasing
* numbers. This fits nicely with DEQ not using bus number 1; I
* assume that is what it as intended for. I guess we'll see if they
* come out with a system using more than one pchip..
*
* Next, we must attempt to map the FreeBSD assigned numbers to the
* numbers assigned by DEQ in order to generate proper config space
* addrs. We store the next number past the 0th bus of our hose and
* do subtraction to determine what the DEQ number should have been,
* given a FreeBSD bus number. This is disgusting & quite possibly
* wrong.
*/
int
tsunami_bus_within_hose(int hose, int bus)
{
if (hose == bus)
return 0;
else
return ( (bus - tsunami_hoses[hose]) + 1);
}
/*
* this function supports pciconf ioctls
*/
int
tsunami_hose_from_bus(int bus)
{
int i;
if (bus < tsunami_maxhoseno)
return bus;
for (i = 1; i <= TSUNAMI_MAXHOSES && tsunami_hoses[i] != -1; i++){
if(tsunami_hoses[i] >= bus)
return i-1;
}
return i-1;
}
static int
tsunami_pcib_probe(device_t dev)
{
static int error;
device_t child;
int lastbus;
device_set_desc(dev, "21271 PCI host bus adapter");
child = device_add_child(dev, "pci", -1);
if (tsunami_maxhoseno) {
lastbus = (device_get_unit(child) - 1);
if (lastbus == 0) /* didn't have a ppb on hose 0 */
lastbus++;
tsunami_hoses[tsunami_maxhoseno] = lastbus;
}
if ((error = device_delete_child(dev, child)))
panic("tsunami_pcib_probe: device_delete_child failed\n");
child = device_add_child(dev, "pci", tsunami_maxhoseno);
if (tsunami_maxhoseno != device_get_unit(child)) {
printf("tsunami_pcib_probe: wanted unit %d ",
tsunami_maxhoseno);
printf(" got unit %d\n", device_get_unit(child));
panic("tsunami_pcib_probe: incorrect bus numbering");
}
tsunami_maxhoseno++;
return 0;
}
static int
tsunami_pcib_read_ivar(device_t dev, device_t child, int which, u_long *result)
{
if (which == PCIB_IVAR_HOSE) {
*result = *(int*) device_get_ivars(dev);
return 0;
}
return ENOENT;
}
static device_method_t tsunami_pcib_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, tsunami_pcib_probe),
DEVMETHOD(device_attach, bus_generic_attach),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_read_ivar, tsunami_pcib_read_ivar),
DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, alpha_platform_pci_setup_intr),
DEVMETHOD(bus_teardown_intr, alpha_platform_pci_teardown_intr),
{ 0, 0 }
};
static driver_t tsunami_pcib_driver = {
"pcib",
tsunami_pcib_methods,
1,
};
DRIVER_MODULE(pcib, tsunami, tsunami_pcib_driver, pcib_devclass, 0, 0);
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