55aaf894e8
support machines having multiple independently numbered PCI domains and don't support reenumeration without ambiguity amongst the devices as seen by the OS and represented by PCI location strings. This includes introducing a function pci_find_dbsf(9) which works like pci_find_bsf(9) but additionally takes a domain number argument and limiting pci_find_bsf(9) to only search devices in domain 0 (the only domain in single-domain systems). Bge(4) and ofw_pcibus(4) are changed to use pci_find_dbsf(9) instead of pci_find_bsf(9) in order to no longer report false positives when searching for siblings and dupe devices in the same domain respectively. Along with this change the sole host-PCI bridge driver converted to actually make use of PCI domain support is uninorth(4), the others continue to use domain 0 only for now and need to be converted as appropriate later on. Note that this means that the format of the location strings as used by pciconf(8) has been changed and that consumers of <sys/pciio.h> potentially need to be recompiled. Suggested by: jhb Reviewed by: grehan, jhb, marcel Approved by: re (kensmith), jhb (PCI maintainer hat)
374 lines
12 KiB
C
374 lines
12 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <sys/sysctl.h>
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#include <contrib/dev/acpica/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_flags;
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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 int acpi_pcib_alloc_msi(device_t pcib, device_t dev,
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int count, int maxcount, int *irqs);
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static int acpi_pcib_map_msi(device_t pcib, device_t dev,
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int irq, uint64_t *addr, uint32_t *data);
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static int acpi_pcib_alloc_msix(device_t pcib, device_t dev,
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int *irq);
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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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DEVMETHOD(pcib_alloc_msi, acpi_pcib_alloc_msi),
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DEVMETHOD(pcib_release_msi, pcib_release_msi),
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DEVMETHOD(pcib_alloc_msix, acpi_pcib_alloc_msix),
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DEVMETHOD(pcib_release_msix, pcib_release_msix),
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DEVMETHOD(pcib_map_msi, acpi_pcib_map_msi),
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{0, 0}
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};
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static devclass_t pcib_devclass;
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DEFINE_CLASS_0(pcib, acpi_pcib_acpi_driver, acpi_pcib_acpi_methods,
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sizeof(struct acpi_hpcib_softc));
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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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static char *pcib_ids[] = { "PNP0A03", NULL };
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if (acpi_disabled("pcib") ||
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ACPI_ID_PROBE(device_get_parent(dev), dev, pcib_ids) == NULL)
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return (ENXIO);
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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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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 = ACPI_ADR_PCI_SLOT(addr);
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func = ACPI_ADR_PCI_FUNC(addr);
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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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return (acpi_pcib_resume(dev));
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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_DOMAIN:
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*result = 0;
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return (0);
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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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case ACPI_IVAR_FLAGS:
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*result = (uintptr_t)sc->ap_flags;
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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_DOMAIN:
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return (EINVAL);
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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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case ACPI_IVAR_HANDLE:
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sc->ap_handle = (ACPI_HANDLE)value;
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return (0);
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case ACPI_IVAR_FLAGS:
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sc->ap_flags = (int)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 = 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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static int
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acpi_pcib_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
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int *irqs)
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{
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device_t bus;
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bus = device_get_parent(pcib);
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return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
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irqs));
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}
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static int
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acpi_pcib_alloc_msix(device_t pcib, device_t dev, int *irq)
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{
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device_t bus;
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bus = device_get_parent(pcib);
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return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
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}
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static int
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acpi_pcib_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
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uint32_t *data)
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{
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device_t bus;
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bus = device_get_parent(pcib);
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return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data));
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}
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static u_long acpi_host_mem_start = 0x80000000;
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TUNABLE_ULONG("hw.acpi.host_mem_start", &acpi_host_mem_start);
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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 32MB 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. This is typically only used on older laptops
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* that don't have pci busses behind pci bridge, so assuming > 32MB
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* is liekly OK.
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*/
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if (type == SYS_RES_MEMORY && start == 0UL && end == ~0UL)
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start = acpi_host_mem_start;
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if (type == SYS_RES_IOPORT && start == 0UL && end == ~0UL)
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start = 0x1000;
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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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