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 #include "opt_acpi.h"
30
31 #include <sys/param.h>
32 #include <sys/bus.h>
33 #include <sys/kernel.h>
34 #include <sys/malloc.h>
35 #include <sys/module.h>
36 #include <sys/rman.h>
37
38 #include <contrib/dev/acpica/include/acpi.h>
39 #include <contrib/dev/acpica/include/accommon.h>
40
41 #include <dev/acpica/acpivar.h>
42 #include <dev/acpica/acpi_pcibvar.h>
43
44 #include <machine/pci_cfgreg.h>
45 #include <dev/pci/pcivar.h>
46 #include <dev/pci/pcireg.h>
47 #include <dev/pci/pcib_private.h>
48 #include "pcib_if.h"
49
50 /* Hooks for the ACPI CA debugging infrastructure. */
51 #define _COMPONENT ACPI_BUS
52 ACPI_MODULE_NAME("PCI_PCI")
53
54 struct acpi_pcib_softc {
55 struct pcib_softc ap_pcibsc;
56 ACPI_HANDLE ap_handle;
57 ACPI_BUFFER ap_prt; /* interrupt routing table */
58 };
59
60 struct acpi_pcib_lookup_info {
61 UINT32 address;
62 ACPI_HANDLE handle;
63 };
64
65 static int acpi_pcib_pci_probe(device_t bus);
66 static int acpi_pcib_pci_attach(device_t bus);
67 static int acpi_pcib_pci_detach(device_t bus);
68 static int acpi_pcib_read_ivar(device_t dev, device_t child,
69 int which, uintptr_t *result);
70 static int acpi_pcib_pci_route_interrupt(device_t pcib,
71 device_t dev, int pin);
72
73 static device_method_t acpi_pcib_pci_methods[] = {
74 /* Device interface */
75 DEVMETHOD(device_probe, acpi_pcib_pci_probe),
76 DEVMETHOD(device_attach, acpi_pcib_pci_attach),
77 DEVMETHOD(device_detach, acpi_pcib_pci_detach),
78
79 /* Bus interface */
80 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
81 DEVMETHOD(bus_get_cpus, acpi_pcib_get_cpus),
82
83 /* pcib interface */
84 DEVMETHOD(pcib_route_interrupt, acpi_pcib_pci_route_interrupt),
85 DEVMETHOD(pcib_power_for_sleep, acpi_pcib_power_for_sleep),
86
87 DEVMETHOD_END
88 };
89
90 DEFINE_CLASS_1(pcib, acpi_pcib_pci_driver, acpi_pcib_pci_methods,
91 sizeof(struct acpi_pcib_softc), pcib_driver);
92 DRIVER_MODULE(acpi_pcib, pci, acpi_pcib_pci_driver, 0, 0);
93 MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
94
95 static int
acpi_pcib_pci_probe(device_t dev)96 acpi_pcib_pci_probe(device_t dev)
97 {
98
99 if (pci_get_class(dev) != PCIC_BRIDGE ||
100 pci_get_subclass(dev) != PCIS_BRIDGE_PCI ||
101 acpi_disabled("pci"))
102 return (ENXIO);
103 if (acpi_get_handle(dev) == NULL)
104 return (ENXIO);
105 if (pci_cfgregopen() == 0)
106 return (ENXIO);
107
108 device_set_desc(dev, "ACPI PCI-PCI bridge");
109 return (-1000);
110 }
111
112 static int
acpi_pcib_pci_attach(device_t dev)113 acpi_pcib_pci_attach(device_t dev)
114 {
115 struct acpi_pcib_softc *sc;
116
117 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
118
119 pcib_attach_common(dev);
120 sc = device_get_softc(dev);
121 sc->ap_handle = acpi_get_handle(dev);
122 acpi_pcib_fetch_prt(dev, &sc->ap_prt);
123
124 return (pcib_attach_child(dev));
125 }
126
127 static int
acpi_pcib_pci_detach(device_t dev)128 acpi_pcib_pci_detach(device_t dev)
129 {
130 struct acpi_pcib_softc *sc;
131 int error;
132
133 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
134
135 sc = device_get_softc(dev);
136 error = pcib_detach(dev);
137 if (error == 0)
138 AcpiOsFree(sc->ap_prt.Pointer);
139 return (error);
140 }
141
142 static int
acpi_pcib_read_ivar(device_t dev,device_t child,int which,uintptr_t * result)143 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
144 {
145 struct acpi_pcib_softc *sc = device_get_softc(dev);
146
147 switch (which) {
148 case ACPI_IVAR_HANDLE:
149 *result = (uintptr_t)sc->ap_handle;
150 return (0);
151 }
152 return (pcib_read_ivar(dev, child, which, result));
153 }
154
155 static int
acpi_pcib_pci_route_interrupt(device_t pcib,device_t dev,int pin)156 acpi_pcib_pci_route_interrupt(device_t pcib, device_t dev, int pin)
157 {
158 struct acpi_pcib_softc *sc;
159
160 sc = device_get_softc(pcib);
161
162 /*
163 * If we don't have a _PRT, fall back to the swizzle method
164 * for routing interrupts.
165 */
166 if (sc->ap_prt.Pointer == NULL)
167 return (pcib_route_interrupt(pcib, dev, pin));
168 else
169 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
170 }
171