acpi_pcib_pci.c revision 280970 
1/*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: stable/10/sys/dev/acpica/acpi_pcib_pci.c 280970 2015-04-01 21:48:54Z jhb $");
30
31#include "opt_acpi.h"
32
33#include <sys/param.h>
34#include <sys/bus.h>
35#include <sys/kernel.h>
36#include <sys/malloc.h>
37#include <sys/module.h>
38#include <sys/rman.h>
39
40#include <contrib/dev/acpica/include/acpi.h>
41#include <contrib/dev/acpica/include/accommon.h>
42
43#include <dev/acpica/acpivar.h>
44#include <dev/acpica/acpi_pcibvar.h>
45
46#include <machine/pci_cfgreg.h>
47#include <dev/pci/pcivar.h>
48#include <dev/pci/pcireg.h>
49#include <dev/pci/pcib_private.h>
50#include "pcib_if.h"
51
52/* Hooks for the ACPI CA debugging infrastructure. */
53#define _COMPONENT	ACPI_BUS
54ACPI_MODULE_NAME("PCI_PCI")
55
56struct acpi_pcib_softc {
57    struct pcib_softc	ap_pcibsc;
58    ACPI_HANDLE		ap_handle;
59    ACPI_BUFFER		ap_prt;		/* interrupt routing table */
60};
61
62struct acpi_pcib_lookup_info {
63    UINT32		address;
64    ACPI_HANDLE		handle;
65};
66
67static int		acpi_pcib_pci_probe(device_t bus);
68static int		acpi_pcib_pci_attach(device_t bus);
69static int		acpi_pcib_read_ivar(device_t dev, device_t child,
70			    int which, uintptr_t *result);
71static int		acpi_pcib_pci_route_interrupt(device_t pcib,
72			    device_t dev, int pin);
73
74static device_method_t acpi_pcib_pci_methods[] = {
75    /* Device interface */
76    DEVMETHOD(device_probe,		acpi_pcib_pci_probe),
77    DEVMETHOD(device_attach,		acpi_pcib_pci_attach),
78
79    /* Bus interface */
80    DEVMETHOD(bus_read_ivar,		acpi_pcib_read_ivar),
81
82    /* pcib interface */
83    DEVMETHOD(pcib_route_interrupt,	acpi_pcib_pci_route_interrupt),
84    DEVMETHOD(pcib_power_for_sleep,	acpi_pcib_power_for_sleep),
85
86    DEVMETHOD_END
87};
88
89static devclass_t pcib_devclass;
90
91DEFINE_CLASS_1(pcib, acpi_pcib_pci_driver, acpi_pcib_pci_methods,
92    sizeof(struct acpi_pcib_softc), pcib_driver);
93DRIVER_MODULE(acpi_pcib, pci, acpi_pcib_pci_driver, pcib_devclass, 0, 0);
94MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
95
96static int
97acpi_pcib_pci_probe(device_t dev)
98{
99
100    if (pci_get_class(dev) != PCIC_BRIDGE ||
101	pci_get_subclass(dev) != PCIS_BRIDGE_PCI ||
102	acpi_disabled("pci"))
103	return (ENXIO);
104    if (acpi_get_handle(dev) == NULL)
105	return (ENXIO);
106    if (pci_cfgregopen() == 0)
107	return (ENXIO);
108
109    device_set_desc(dev, "ACPI PCI-PCI bridge");
110    return (-1000);
111}
112
113static int
114acpi_pcib_pci_attach(device_t dev)
115{
116    struct acpi_pcib_softc *sc;
117
118    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
119
120    pcib_attach_common(dev);
121    sc = device_get_softc(dev);
122    sc->ap_handle = acpi_get_handle(dev);
123    return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_pcibsc.bus.sec));
124}
125
126static int
127acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
128{
129    struct acpi_pcib_softc *sc = device_get_softc(dev);
130
131    switch (which) {
132    case ACPI_IVAR_HANDLE:
133	*result = (uintptr_t)sc->ap_handle;
134	return (0);
135    }
136    return (pcib_read_ivar(dev, child, which, result));
137}
138
139static int
140acpi_pcib_pci_route_interrupt(device_t pcib, device_t dev, int pin)
141{
142    struct acpi_pcib_softc *sc;
143
144    sc = device_get_softc(pcib);
145
146    /*
147     * If we don't have a _PRT, fall back to the swizzle method
148     * for routing interrupts.
149     */
150    if (sc->ap_prt.Pointer == NULL)
151	return (pcib_route_interrupt(pcib, dev, pin));
152    else
153	return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
154}
155