1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/*-
* Copyright (c) 2000 Michael Smith
* Copyright (c) 2000 BSDi
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pci.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcib_private.h>
#include <machine/intr_machdep.h>
#include "pcib_if.h"
static int ofw_pcib_pci_probe(device_t bus);
static int ofw_pcib_pci_attach(device_t bus);
static phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev);
static int ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev,
int intpin);
static device_method_t ofw_pcib_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ofw_pcib_pci_probe),
DEVMETHOD(device_attach, ofw_pcib_pci_attach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_read_ivar, pcib_read_ivar),
DEVMETHOD(bus_write_ivar, pcib_write_ivar),
DEVMETHOD(bus_alloc_resource, pcib_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
/* pcib interface */
DEVMETHOD(pcib_maxslots, pcib_maxslots),
DEVMETHOD(pcib_read_config, pcib_read_config),
DEVMETHOD(pcib_write_config, pcib_write_config),
DEVMETHOD(pcib_route_interrupt, ofw_pcib_pci_route_interrupt),
DEVMETHOD(pcib_alloc_msi, pcib_alloc_msi),
DEVMETHOD(pcib_release_msi, pcib_release_msi),
DEVMETHOD(pcib_alloc_msix, pcib_alloc_msix),
DEVMETHOD(pcib_release_msix, pcib_release_msix),
DEVMETHOD(pcib_map_msi, pcib_map_msi),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_node, ofw_pcib_pci_get_node),
DEVMETHOD_END
};
static devclass_t pcib_devclass;
struct ofw_pcib_softc {
/*
* This is here so that we can use pci bridge methods, too - the
* generic routines only need the dev, secbus and subbus members
* filled.
*/
struct pcib_softc ops_pcib_sc;
phandle_t ops_node;
struct ofw_bus_iinfo ops_iinfo;
};
DEFINE_CLASS_0(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods,
sizeof(struct ofw_pcib_softc));
DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, pcib_devclass, 0, 0);
static int
ofw_pcib_pci_probe(device_t dev)
{
if ((pci_get_class(dev) != PCIC_BRIDGE) ||
(pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) {
return (ENXIO);
}
if (ofw_bus_get_node(dev) == 0)
return (ENXIO);
device_set_desc(dev, "OFW PCI-PCI bridge");
return (0);
}
static int
ofw_pcib_pci_attach(device_t dev)
{
struct ofw_pcib_softc *sc;
sc = device_get_softc(dev);
sc->ops_pcib_sc.dev = dev;
sc->ops_node = ofw_bus_get_node(dev);
ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo,
sizeof(cell_t));
pcib_attach_common(dev);
device_add_child(dev, "pci", -1);
return (bus_generic_attach(dev));
}
static phandle_t
ofw_pcib_pci_get_node(device_t bridge, device_t dev)
{
/* We have only one child, the PCI bus, so pass it our node */
return (ofw_bus_get_node(bridge));
}
static int
ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin)
{
struct ofw_pcib_softc *sc;
struct ofw_bus_iinfo *ii;
struct ofw_pci_register reg;
cell_t pintr, mintr;
phandle_t iparent;
uint8_t maskbuf[sizeof(reg) + sizeof(pintr)];
sc = device_get_softc(bridge);
ii = &sc->ops_iinfo;
if (ii->opi_imapsz > 0) {
pintr = intpin;
if (ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, ®,
sizeof(reg), &pintr, sizeof(pintr), &mintr, sizeof(mintr),
&iparent, maskbuf)) {
/*
* If we've found a mapping, return it and don't map
* it again on higher levels - that causes problems
* in some cases, and never seems to be required.
*/
return (MAP_IRQ(iparent, mintr));
}
} else if (intpin >= 1 && intpin <= 4) {
/*
* When an interrupt map is missing, we need to do the
* standard PCI swizzle and continue mapping at the parent.
*/
return (pcib_route_interrupt(bridge, dev, intpin));
}
return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent(
bridge)), bridge, intpin));
}
|