freebsd-dev/sys/sparc64/pci/apb.c
Justin Hibbits da1b038af9 Use uintmax_t (typedef'd to rman_res_t type) for rman ranges.
On some architectures, u_long isn't large enough for resource definitions.
Particularly, powerpc and arm allow 36-bit (or larger) physical addresses, but
type `long' is only 32-bit.  This extends rman's resources to uintmax_t.  With
this change, any resource can feasibly be placed anywhere in physical memory
(within the constraints of the driver).

Why uintmax_t and not something machine dependent, or uint64_t?  Though it's
possible for uintmax_t to grow, it's highly unlikely it will become 128-bit on
32-bit architectures.  64-bit architectures should have plenty of RAM to absorb
the increase on resource sizes if and when this occurs, and the number of
resources on memory-constrained systems should be sufficiently small as to not
pose a drastic overhead.  That being said, uintmax_t was chosen for source
clarity.  If it's specified as uint64_t, all printf()-like calls would either
need casts to uintmax_t, or be littered with PRI*64 macros.  Casts to uintmax_t
aren't horrible, but it would also bake into the API for
resource_list_print_type() either a hidden assumption that entries get cast to
uintmax_t for printing, or these calls would need the PRI*64 macros.  Since
source code is meant to be read more often than written, I chose the clearest
path of simply using uintmax_t.

Tested on a PowerPC p5020-based board, which places all device resources in
0xfxxxxxxxx, and has 8GB RAM.
Regression tested on qemu-system-i386
Regression tested on qemu-system-mips (malta profile)

Tested PAE and devinfo on virtualbox (live CD)

Special thanks to bz for his testing on ARM.

Reviewed By: bz, jhb (previous)
Relnotes:	Yes
Sponsored by:	Alex Perez/Inertial Computing
Differential Revision: https://reviews.freebsd.org/D4544
2016-03-18 01:28:41 +00:00

307 lines
8.8 KiB
C

/*-
* Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
* Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
* Copyright (c) 2000 BSDi
* Copyright (c) 2001, 2003 Thomas Moestl <tmm@FreeBSD.org>
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
* from: FreeBSD: src/sys/dev/pci/pci_pci.c,v 1.3 2000/12/13
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Support for the Sun APB (Advanced PCI Bridge) PCI-PCI bridge.
* This bridge does not fully comply to the PCI bridge specification, and is
* therefore not supported by the generic driver.
* We can use some of the pcib methods anyway.
*/
#include "opt_ofw_pci.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/openfirm.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcib_private.h>
#include "pcib_if.h"
#include <sparc64/pci/ofw_pci.h>
#include <sparc64/pci/ofw_pcib_subr.h>
/*
* Bridge-specific data.
*/
struct apb_softc {
struct ofw_pcib_gen_softc sc_bsc;
uint8_t sc_iomap;
uint8_t sc_memmap;
};
static device_probe_t apb_probe;
static device_attach_t apb_attach;
static bus_alloc_resource_t apb_alloc_resource;
static bus_adjust_resource_t apb_adjust_resource;
static device_method_t apb_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, apb_probe),
DEVMETHOD(device_attach, apb_attach),
/* Bus interface */
DEVMETHOD(bus_alloc_resource, apb_alloc_resource),
DEVMETHOD(bus_adjust_resource, apb_adjust_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
/* pcib interface */
DEVMETHOD(pcib_route_interrupt, ofw_pcib_gen_route_interrupt),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_node, ofw_pcib_gen_get_node),
DEVMETHOD_END
};
static devclass_t pcib_devclass;
DEFINE_CLASS_1(pcib, apb_driver, apb_methods, sizeof(struct apb_softc),
pcib_driver);
EARLY_DRIVER_MODULE(apb, pci, apb_driver, pcib_devclass, 0, 0, BUS_PASS_BUS);
MODULE_DEPEND(apb, pci, 1, 1, 1);
/* APB specific registers */
#define APBR_IOMAP 0xde
#define APBR_MEMMAP 0xdf
/* Definitions for the mapping registers */
#define APB_IO_SCALE 0x200000
#define APB_MEM_SCALE 0x20000000
/*
* Generic device interface
*/
static int
apb_probe(device_t dev)
{
if (pci_get_vendor(dev) == 0x108e && /* Sun */
pci_get_device(dev) == 0x5000) { /* APB */
device_set_desc(dev, "APB PCI-PCI bridge");
return (0);
}
return (ENXIO);
}
static void
apb_map_print(uint8_t map, rman_res_t scale)
{
int i, first;
for (first = 1, i = 0; i < 8; i++) {
if ((map & (1 << i)) != 0) {
printf("%s0x%jx-0x%jx", first ? "" : ", ",
i * scale, (i + 1) * scale - 1);
first = 0;
}
}
}
static int
apb_checkrange(uint8_t map, rman_res_t scale, rman_res_t start, rman_res_t end)
{
int i, ei;
i = start / scale;
ei = end / scale;
if (i > 7 || ei > 7)
return (0);
for (; i <= ei; i++)
if ((map & (1 << i)) == 0)
return (0);
return (1);
}
static int
apb_attach(device_t dev)
{
struct apb_softc *sc;
struct sysctl_ctx_list *sctx;
struct sysctl_oid *soid;
sc = device_get_softc(dev);
/*
* Get current bridge configuration.
*/
sc->sc_bsc.ops_pcib_sc.domain = pci_get_domain(dev);
sc->sc_bsc.ops_pcib_sc.pribus = pci_get_bus(dev);
pci_write_config(dev, PCIR_PRIBUS_1, sc->sc_bsc.ops_pcib_sc.pribus, 1);
sc->sc_bsc.ops_pcib_sc.bus.sec =
pci_read_config(dev, PCIR_SECBUS_1, 1);
sc->sc_bsc.ops_pcib_sc.bus.sub =
pci_read_config(dev, PCIR_SUBBUS_1, 1);
sc->sc_bsc.ops_pcib_sc.bridgectl =
pci_read_config(dev, PCIR_BRIDGECTL_1, 2);
sc->sc_iomap = pci_read_config(dev, APBR_IOMAP, 1);
sc->sc_memmap = pci_read_config(dev, APBR_MEMMAP, 1);
/*
* Setup SYSCTL reporting nodes.
*/
sctx = device_get_sysctl_ctx(dev);
soid = device_get_sysctl_tree(dev);
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "domain",
CTLFLAG_RD, &sc->sc_bsc.ops_pcib_sc.domain, 0,
"Domain number");
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "pribus",
CTLFLAG_RD, &sc->sc_bsc.ops_pcib_sc.pribus, 0,
"Primary bus number");
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "secbus",
CTLFLAG_RD, &sc->sc_bsc.ops_pcib_sc.bus.sec, 0,
"Secondary bus number");
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "subbus",
CTLFLAG_RD, &sc->sc_bsc.ops_pcib_sc.bus.sub, 0,
"Subordinate bus number");
ofw_pcib_gen_setup(dev);
if (bootverbose) {
device_printf(dev, " domain %d\n",
sc->sc_bsc.ops_pcib_sc.domain);
device_printf(dev, " secondary bus %d\n",
sc->sc_bsc.ops_pcib_sc.bus.sec);
device_printf(dev, " subordinate bus %d\n",
sc->sc_bsc.ops_pcib_sc.bus.sub);
device_printf(dev, " I/O decode ");
apb_map_print(sc->sc_iomap, APB_IO_SCALE);
printf("\n");
device_printf(dev, " memory decode ");
apb_map_print(sc->sc_memmap, APB_MEM_SCALE);
printf("\n");
}
device_add_child(dev, "pci", -1);
return (bus_generic_attach(dev));
}
/*
* We have to trap resource allocation requests and ensure that the bridge
* is set up to, or capable of handling them.
*/
static struct resource *
apb_alloc_resource(device_t dev, device_t child, int type, int *rid,
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
{
struct apb_softc *sc;
sc = device_get_softc(dev);
/*
* If this is a "default" allocation against this rid, we can't work
* out where it's coming from (we should actually never see these) so
* we just have to punt.
*/
if (RMAN_IS_DEFAULT_RANGE(start, end)) {
device_printf(dev, "can't decode default resource id %d for "
"%s, bypassing\n", *rid, device_get_nameunit(child));
goto passup;
}
/*
* Fail the allocation for this range if it's not supported.
* XXX we should probably just fix up the bridge decode and
* soldier on.
*/
switch (type) {
case SYS_RES_IOPORT:
if (!apb_checkrange(sc->sc_iomap, APB_IO_SCALE, start, end)) {
device_printf(dev, "device %s requested unsupported "
"I/O range 0x%jx-0x%jx\n",
device_get_nameunit(child), start, end);
return (NULL);
}
if (bootverbose)
device_printf(sc->sc_bsc.ops_pcib_sc.dev, "device "
"%s requested decoded I/O range 0x%jx-0x%jx\n",
device_get_nameunit(child), start, end);
break;
case SYS_RES_MEMORY:
if (!apb_checkrange(sc->sc_memmap, APB_MEM_SCALE, start,
end)) {
device_printf(dev, "device %s requested unsupported "
"memory range 0x%jx-0x%jx\n",
device_get_nameunit(child), start, end);
return (NULL);
}
if (bootverbose)
device_printf(sc->sc_bsc.ops_pcib_sc.dev, "device "
"%s requested decoded memory range 0x%jx-0x%jx\n",
device_get_nameunit(child), start, end);
break;
}
passup:
/*
* Bridge is OK decoding this resource, so pass it up.
*/
return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
count, flags));
}
static int
apb_adjust_resource(device_t dev, device_t child, int type,
struct resource *r, rman_res_t start, rman_res_t end)
{
struct apb_softc *sc;
sc = device_get_softc(dev);
switch (type) {
case SYS_RES_IOPORT:
if (!apb_checkrange(sc->sc_iomap, APB_IO_SCALE, start, end))
return (ENXIO);
break;
case SYS_RES_MEMORY:
if (!apb_checkrange(sc->sc_memmap, APB_MEM_SCALE, start, end))
return (ENXIO);
break;
}
return (bus_generic_adjust_resource(dev, child, type, r, start, end));
}