9123341378
allocation was passed up to nexus. Now, we probe sysresource objects and
manage the resources they describe in a local rman pool. This helps
devices which attach/detach varying resources (like the _CST object) and
module loads/unloads. The allocation/release routines now check to see if
the resource is described in a child sysresource object and if so,
allocate from the local rman. Sysresource objects add their resources to
the pool and reserve them upon boot. This means sysresources need to be
probed before other ACPI devices.
Changes include:
* Add ordering to the child device probe. The current order is: system
resource objects, embedded controllers, then everything else.
* Make acpi_MatchHid take a handle instead of a device_t arg.
* Replace acpi_{get,set}_resource with the generic equivalents.
313 lines
9.9 KiB
C
313 lines
9.9 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include "acpi.h"
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#include <dev/acpica/acpivar.h>
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#include <machine/pci_cfgreg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcib_private.h>
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#include "pcib_if.h"
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#include <dev/acpica/acpi_pcibvar.h>
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/* Hooks for the ACPI CA debugging infrastructure. */
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#define _COMPONENT ACPI_BUS
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ACPI_MODULE_NAME("PCI_ACPI")
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struct acpi_hpcib_softc {
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device_t ap_dev;
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ACPI_HANDLE ap_handle;
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int ap_segment; /* analagous to Alpha 'hose' */
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int ap_bus; /* bios-assigned bus number */
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ACPI_BUFFER ap_prt; /* interrupt routing table */
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};
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static int acpi_pcib_acpi_probe(device_t bus);
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static int acpi_pcib_acpi_attach(device_t bus);
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static int acpi_pcib_acpi_resume(device_t bus);
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static int acpi_pcib_read_ivar(device_t dev, device_t child,
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int which, uintptr_t *result);
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static int acpi_pcib_write_ivar(device_t dev, device_t child,
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int which, uintptr_t value);
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static uint32_t acpi_pcib_read_config(device_t dev, int bus, int slot,
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int func, int reg, int bytes);
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static void acpi_pcib_write_config(device_t dev, int bus, int slot,
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int func, int reg, uint32_t data, int bytes);
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static int acpi_pcib_acpi_route_interrupt(device_t pcib,
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device_t dev, int pin);
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static struct resource *acpi_pcib_acpi_alloc_resource(device_t dev,
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device_t child, int type, int *rid,
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u_long start, u_long end, u_long count,
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u_int flags);
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static device_method_t acpi_pcib_acpi_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, acpi_pcib_acpi_probe),
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DEVMETHOD(device_attach, acpi_pcib_acpi_attach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, acpi_pcib_acpi_resume),
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/* Bus interface */
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DEVMETHOD(bus_print_child, bus_generic_print_child),
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DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
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DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar),
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DEVMETHOD(bus_alloc_resource, acpi_pcib_acpi_alloc_resource),
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DEVMETHOD(bus_release_resource, bus_generic_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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/* pcib interface */
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DEVMETHOD(pcib_maxslots, pcib_maxslots),
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DEVMETHOD(pcib_read_config, acpi_pcib_read_config),
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DEVMETHOD(pcib_write_config, acpi_pcib_write_config),
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DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt),
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{0, 0}
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};
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static driver_t acpi_pcib_acpi_driver = {
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"pcib",
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acpi_pcib_acpi_methods,
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sizeof(struct acpi_hpcib_softc),
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};
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DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0);
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MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
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static int
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acpi_pcib_acpi_probe(device_t dev)
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{
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if (acpi_get_type(dev) == ACPI_TYPE_DEVICE && !acpi_disabled("pci") &&
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acpi_MatchHid(acpi_get_handle(dev), "PNP0A03")) {
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if (pci_cfgregopen() == 0)
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return (ENXIO);
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device_set_desc(dev, "ACPI Host-PCI bridge");
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return (0);
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}
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return (ENXIO);
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}
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static int
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acpi_pcib_acpi_attach(device_t dev)
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{
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struct acpi_hpcib_softc *sc;
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ACPI_STATUS status;
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u_int addr, slot, func, busok;
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uint8_t busno;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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sc = device_get_softc(dev);
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sc->ap_dev = dev;
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sc->ap_handle = acpi_get_handle(dev);
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/*
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* Get our base bus number by evaluating _BBN.
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* If this doesn't work, we assume we're bus number 0.
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*
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* XXX note that it may also not exist in the case where we are
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* meant to use a private configuration space mechanism for this bus,
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* so we should dig out our resources and check to see if we have
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* anything like that. How do we do this?
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* XXX If we have the requisite information, and if we don't think the
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* default PCI configuration space handlers can deal with this bus,
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* we should attach our own handler.
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* XXX invoke _REG on this for the PCI config space address space?
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* XXX It seems many BIOS's with multiple Host-PCI bridges do not set
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* _BBN correctly. They set _BBN to zero for all bridges. Thus,
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* if _BBN is zero and pcib0 already exists, we try to read our
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* bus number from the configuration registers at address _ADR.
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*/
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status = acpi_GetInteger(sc->ap_handle, "_BBN", &sc->ap_bus);
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND) {
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device_printf(dev, "could not evaluate _BBN - %s\n",
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AcpiFormatException(status));
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return_VALUE (ENXIO);
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} else {
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/* If it's not found, assume 0. */
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sc->ap_bus = 0;
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}
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}
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/*
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* If the bus is zero and pcib0 already exists, read the bus number
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* via PCI config space.
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*/
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busok = 1;
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if (sc->ap_bus == 0 && devclass_get_device(pcib_devclass, 0) != dev) {
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busok = 0;
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status = acpi_GetInteger(sc->ap_handle, "_ADR", &addr);
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND) {
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device_printf(dev, "could not evaluate _ADR - %s\n",
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AcpiFormatException(status));
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return_VALUE (ENXIO);
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} else
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device_printf(dev, "couldn't find _ADR\n");
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} else {
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/* XXX: We assume bus 0. */
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slot = addr >> 16;
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func = addr & 0xffff;
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if (bootverbose)
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device_printf(dev, "reading config registers from 0:%d:%d\n",
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slot, func);
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if (host_pcib_get_busno(pci_cfgregread, 0, slot, func, &busno) == 0)
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device_printf(dev, "couldn't read bus number from cfg space\n");
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else {
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sc->ap_bus = busno;
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busok = 1;
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}
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}
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}
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/*
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* If nothing else worked, hope that ACPI at least lays out the
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* host-PCI bridges in order and that as a result our unit number
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* is actually our bus number. There are several reasons this
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* might not be true.
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*/
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if (busok == 0) {
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sc->ap_bus = device_get_unit(dev);
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device_printf(dev, "trying bus number %d\n", sc->ap_bus);
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}
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/*
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* Get our segment number by evaluating _SEG
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* It's OK for this to not exist.
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*/
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status = acpi_GetInteger(sc->ap_handle, "_SEG", &sc->ap_segment);
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND) {
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device_printf(dev, "could not evaluate _SEG - %s\n",
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AcpiFormatException(status));
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return_VALUE (ENXIO);
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}
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/* If it's not found, assume 0. */
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sc->ap_segment = 0;
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}
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return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus));
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}
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static int
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acpi_pcib_acpi_resume(device_t dev)
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{
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struct acpi_hpcib_softc *sc = device_get_softc(dev);
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return (acpi_pcib_resume(dev, &sc->ap_prt, sc->ap_bus));
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}
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/*
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* Support for standard PCI bridge ivars.
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*/
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static int
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acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
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{
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struct acpi_hpcib_softc *sc = device_get_softc(dev);
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switch (which) {
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case PCIB_IVAR_BUS:
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*result = sc->ap_bus;
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return (0);
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case ACPI_IVAR_HANDLE:
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*result = (uintptr_t)sc->ap_handle;
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return (0);
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}
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return (ENOENT);
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}
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static int
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acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
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{
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struct acpi_hpcib_softc *sc = device_get_softc(dev);
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switch (which) {
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case PCIB_IVAR_BUS:
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sc->ap_bus = value;
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return (0);
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}
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return (ENOENT);
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}
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static uint32_t
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acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg,
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int bytes)
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{
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return (pci_cfgregread(bus, slot, func, reg, bytes));
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}
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static void
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acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg,
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uint32_t data, int bytes)
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{
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pci_cfgregwrite(bus, slot, func, reg, data, bytes);
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}
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static int
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acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin)
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{
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struct acpi_hpcib_softc *sc;
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/* Find the bridge softc. */
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sc = device_get_softc(pcib);
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return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
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}
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struct resource *
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acpi_pcib_acpi_alloc_resource(device_t dev, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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/*
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* If no memory preference is given, use upper 256MB slot most
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* bioses use for their memory window. Typically other bridges
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* before us get in the way to assert their preferences on memory.
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* Hardcoding like this sucks, so a more MD/MI way needs to be
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* found to do it.
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*/
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if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL)
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start = 0xf0000000;
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return (bus_generic_alloc_resource(dev, child, type, rid, start, end,
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count, flags));
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}
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