d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
1249ba5fc6
freebsd-skq/sys/sparc64/pci/apb.c
Marius Strobl bda8e754a1 Make sparc64 compatible with NEW_PCIB and enable it: 
- Implement bus_adjust_resource() methods as far as necessary and in non-PCI
  bridge drivers as far as feasible without rototilling them.
- As NEW_PCIB does a layering violation by activating resources at layers
  above pci(4) without previously bubbling up their allocation there, move
  the assignment of bus tags and handles from the bus_alloc_resource() to
  the bus_activate_resource() methods like at least the other NEW_PCIB
  enabled architectures do. This is somewhat unfortunate as previously
  sparc64 (ab)used resource activation to indicate whether SYS_RES_MEMORY
  resources should be mapped into KVA, which is only necessary if their
  going to be accessed via the pointer returned from rman_get_virtual() but
  not for bus_space(9) as the later always uses physical access on sparc64.
  Besides wasting KVA if we always map in SYS_RES_MEMORY resources, a driver
  also may deliberately not map them in if the firmware already has done so,
  possibly in a special way. So in order to still allow a driver to decide
  whether a SYS_RES_MEMORY resource should be mapped into KVA we let it
  indicate that by calling bus_space_map(9) with BUS_SPACE_MAP_LINEAR as
  actually documented in the bus_space(9) page. This is implemented by
  allocating a separate bus tag per SYS_RES_MEMORY resource and passing the
  resource via the previously unused bus tag cookie so we later on can call
  rman_set_virtual() in sparc64_bus_mem_map(). As a side effect this now
  also allows to actually indicate that a SYS_RES_MEMORY resource should be
  mapped in as cacheable and/or read-only via BUS_SPACE_MAP_CACHEABLE and
  BUS_SPACE_MAP_READONLY respectively.
- Do some minor cleanup like taking advantage of rman_init_from_resource(),
  factor out the common part of bus tag allocation into a newly added
  sparc64_alloc_bus_tag(), hook up some missing newbus methods and replace
  some homegrown versions with the generic counterparts etc.
- While at it, let apb_attach() (which can't use the generic NEW_PCIB code
  as APB bridges just don't have the base and limit registers implemented)
  regarding the config space registers cached in pcib_softc and the SYSCTL
  reporting nodes set up.
2011-10-02 23:22:38 +00:00

313 lines
8.9 KiB
C
Raw Blame History

/*-
* 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),
KOBJMETHOD_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, u_long scale)
{
int i, first;
for (first = 1, i = 0; i < 8; i++) {
if ((map & (1 << i)) != 0) {
printf("%s0x%lx-0x%lx", first ? "" : ", ",
i * scale, (i + 1) * scale - 1);
first = 0;
}
}
}
static int
apb_checkrange(uint8_t map, u_long scale, u_long start, u_long 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.secstat =
pci_read_config(dev, PCIR_SECSTAT_1, 2);
sc->sc_bsc.ops_pcib_sc.command =
pci_read_config(dev, PCIR_COMMAND, 2);
sc->sc_bsc.ops_pcib_sc.pribus =
pci_read_config(dev, PCIR_PRIBUS_1, 1);
sc->sc_bsc.ops_pcib_sc.secbus =
pci_read_config(dev, PCIR_SECBUS_1, 1);
sc->sc_bsc.ops_pcib_sc.subbus =
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_bsc.ops_pcib_sc.seclat =
pci_read_config(dev, PCIR_SECLAT_1, 1);
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.secbus, 0,
"Secondary bus number");
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "subbus",
CTLFLAG_RD, &sc->sc_bsc.ops_pcib_sc.subbus, 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.secbus);
device_printf(dev, " subordinate bus %d\n",
sc->sc_bsc.ops_pcib_sc.subbus);
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,
u_long start, u_long end, u_long 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 (start == 0 && end == ~0) {
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%lx-0x%lx\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%lx-0x%lx\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%lx-0x%lx\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%lx-0x%lx\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, u_long start, u_long 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));
}
Reference in New Issue View Git Blame Copy Permalink