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("$FreeBSD$");
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
54 ACPI_MODULE_NAME("PCI_PCI")
55
56 struct acpi_pcib_softc {
57 struct pcib_softc ap_pcibsc;
58 ACPI_HANDLE ap_handle;
59 ACPI_BUFFER ap_prt; /* interrupt routing table */
60 };
61
62 struct acpi_pcib_lookup_info {
63 UINT32 address;
64 ACPI_HANDLE handle;
65 };
66
67 static int acpi_pcib_pci_probe(device_t bus);
68 static int acpi_pcib_pci_attach(device_t bus);
69 static int acpi_pcib_pci_detach(device_t bus);
70 static int acpi_pcib_read_ivar(device_t dev, device_t child,
71 int which, uintptr_t *result);
72 static int acpi_pcib_pci_route_interrupt(device_t pcib,
73 device_t dev, int pin);
74
75 static device_method_t acpi_pcib_pci_methods[] = {
76 /* Device interface */
77 DEVMETHOD(device_probe, acpi_pcib_pci_probe),
78 DEVMETHOD(device_attach, acpi_pcib_pci_attach),
79 DEVMETHOD(device_detach, acpi_pcib_pci_detach),
80
81 /* Bus interface */
82 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar),
83 DEVMETHOD(bus_get_cpus, acpi_pcib_get_cpus),
84
85 /* pcib interface */
86 DEVMETHOD(pcib_route_interrupt, acpi_pcib_pci_route_interrupt),
87 DEVMETHOD(pcib_power_for_sleep, acpi_pcib_power_for_sleep),
88
89 DEVMETHOD_END
90 };
91
92 static devclass_t pcib_devclass;
93
94 DEFINE_CLASS_1(pcib, acpi_pcib_pci_driver, acpi_pcib_pci_methods,
95 sizeof(struct acpi_pcib_softc), pcib_driver);
96 DRIVER_MODULE(acpi_pcib, pci, acpi_pcib_pci_driver, pcib_devclass, 0, 0);
97 MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
98
99 static int
100 acpi_pcib_pci_probe(device_t dev)
101 {
102
103 if (pci_get_class(dev) != PCIC_BRIDGE ||
104 pci_get_subclass(dev) != PCIS_BRIDGE_PCI ||
105 acpi_disabled("pci"))
106 return (ENXIO);
107 if (acpi_get_handle(dev) == NULL)
108 return (ENXIO);
109 if (pci_cfgregopen() == 0)
110 return (ENXIO);
111
112 device_set_desc(dev, "ACPI PCI-PCI bridge");
113 return (-1000);
114 }
115
116 static int
117 acpi_pcib_pci_attach(device_t dev)
118 {
119 struct acpi_pcib_softc *sc;
120
121 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
122
123 pcib_attach_common(dev);
124 sc = device_get_softc(dev);
125 sc->ap_handle = acpi_get_handle(dev);
126 acpi_pcib_fetch_prt(dev, &sc->ap_prt);
127
128 return (pcib_attach_child(dev));
129 }
130
131 static int
132 acpi_pcib_pci_detach(device_t dev)
133 {
134 struct acpi_pcib_softc *sc;
135 int error;
136
137 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
138
139 sc = device_get_softc(dev);
140 error = pcib_detach(dev);
141 if (error == 0)
142 AcpiOsFree(sc->ap_prt.Pointer);
143 return (error);
144 }
145
146 static int
147 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
148 {
149 struct acpi_pcib_softc *sc = device_get_softc(dev);
150
151 switch (which) {
152 case ACPI_IVAR_HANDLE:
153 *result = (uintptr_t)sc->ap_handle;
154 return (0);
155 }
156 return (pcib_read_ivar(dev, child, which, result));
157 }
158
159 static int
160 acpi_pcib_pci_route_interrupt(device_t pcib, device_t dev, int pin)
161 {
162 struct acpi_pcib_softc *sc;
163
164 sc = device_get_softc(pcib);
165
166 /*
167 * If we don't have a _PRT, fall back to the swizzle method
168 * for routing interrupts.
169 */
170 if (sc->ap_prt.Pointer == NULL)
171 return (pcib_route_interrupt(pcib, dev, pin));
172 else
173 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
174 }
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