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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/* $NetBSD: ppb.c,v 1.42 2010/02/24 22:38:01 dyoung Exp $ */
/*
* Copyright (c) 1996, 1998 Christopher G. Demetriou. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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>
__KERNEL_RCSID(0, "$NetBSD: ppb.c,v 1.42 2010/02/24 22:38:01 dyoung Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/ppbreg.h>
#include <dev/pci/pcidevs.h>
struct ppb_softc {
device_t sc_dev; /* generic device glue */
pci_chipset_tag_t sc_pc; /* our PCI chipset... */
pcitag_t sc_tag; /* ...and tag. */
pcireg_t sc_pciconfext[48];
};
static bool ppb_resume(device_t, const pmf_qual_t *);
static bool ppb_suspend(device_t, const pmf_qual_t *);
static int
ppbmatch(device_t parent, cfdata_t match, void *aux)
{
struct pci_attach_args *pa = aux;
/*
* Check the ID register to see that it's a PCI bridge.
* If it is, we assume that we can deal with it; it _should_
* work in a standardized way...
*/
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI)
return 1;
return 0;
}
static void
ppb_fix_pcix(device_t self)
{
struct ppb_softc *sc = device_private(self);
pcireg_t reg;
int off;
if (!pci_get_capability(sc->sc_pc, sc->sc_tag, PCI_CAP_PCIEXPRESS,
&off, ®))
return; /* Not a PCIe device */
if ((reg & 0x000f0000) != 0x00010000) {
aprint_normal_dev(self, "unsupported PCI Express version\n");
return;
}
reg = pci_conf_read(sc->sc_pc, sc->sc_tag, off + 0x18);
if (reg & 0x003f) {
aprint_normal_dev(self, "disabling notification events\n");
reg &= ~0x003f;
pci_conf_write(sc->sc_pc, sc->sc_tag, off + 0x18, reg);
}
}
static void
ppbattach(device_t parent, device_t self, void *aux)
{
struct ppb_softc *sc = device_private(self);
struct pci_attach_args *pa = aux;
pci_chipset_tag_t pc = pa->pa_pc;
struct pcibus_attach_args pba;
pcireg_t busdata;
char devinfo[256];
pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
aprint_normal(": %s (rev. 0x%02x)\n", devinfo,
PCI_REVISION(pa->pa_class));
aprint_naive("\n");
sc->sc_pc = pc;
sc->sc_tag = pa->pa_tag;
sc->sc_dev = self;
busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO);
if (PPB_BUSINFO_SECONDARY(busdata) == 0) {
aprint_normal_dev(self, "not configured by system firmware\n");
return;
}
ppb_fix_pcix(self);
#if 0
/*
* XXX can't do this, because we're not given our bus number
* (we shouldn't need it), and because we've no way to
* decompose our tag.
*/
/* sanity check. */
if (pa->pa_bus != PPB_BUSINFO_PRIMARY(busdata))
panic("ppbattach: bus in tag (%d) != bus in reg (%d)",
pa->pa_bus, PPB_BUSINFO_PRIMARY(busdata));
#endif
if (!pmf_device_register(self, ppb_suspend, ppb_resume))
aprint_error_dev(self, "couldn't establish power handler\n");
/*
* Attach the PCI bus than hangs off of it.
*
* XXX Don't pass-through Memory Read Multiple. Should we?
* XXX Consult the spec...
*/
pba.pba_iot = pa->pa_iot;
pba.pba_memt = pa->pa_memt;
pba.pba_dmat = pa->pa_dmat;
pba.pba_dmat64 = pa->pa_dmat64;
pba.pba_pc = pc;
pba.pba_flags = pa->pa_flags & ~PCI_FLAGS_MRM_OKAY;
pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata);
pba.pba_bridgetag = &sc->sc_tag;
pba.pba_intrswiz = pa->pa_intrswiz;
pba.pba_intrtag = pa->pa_intrtag;
config_found_ia(self, "pcibus", &pba, pcibusprint);
}
static int
ppbdetach(device_t self, int flags)
{
int rc;
if ((rc = config_detach_children(self, flags)) != 0)
return rc;
pmf_device_deregister(self);
return 0;
}
static bool
ppb_resume(device_t dv, const pmf_qual_t *qual)
{
struct ppb_softc *sc = device_private(dv);
int off;
pcireg_t val;
for (off = 0x40; off <= 0xff; off += 4) {
val = pci_conf_read(sc->sc_pc, sc->sc_tag, off);
if (val != sc->sc_pciconfext[(off - 0x40) / 4])
pci_conf_write(sc->sc_pc, sc->sc_tag, off,
sc->sc_pciconfext[(off - 0x40)/4]);
}
ppb_fix_pcix(dv);
return true;
}
static bool
ppb_suspend(device_t dv, const pmf_qual_t *qual)
{
struct ppb_softc *sc = device_private(dv);
int off;
for (off = 0x40; off <= 0xff; off += 4)
sc->sc_pciconfext[(off - 0x40) / 4] =
pci_conf_read(sc->sc_pc, sc->sc_tag, off);
return true;
}
static void
ppbchilddet(device_t self, device_t child)
{
/* we keep no references to child devices, so do nothing */
}
CFATTACH_DECL3_NEW(ppb, sizeof(struct ppb_softc),
ppbmatch, ppbattach, ppbdetach, NULL, NULL, ppbchilddet,
DVF_DETACH_SHUTDOWN);
|