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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/*-
* Copyright (c) 2000, 2001 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.
*
* $FreeBSD$
*/
/*
* 6.7 : Hardware Abstraction
*/
#include "acpi.h"
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <machine/pci_cfgreg.h>
#include <dev/pci/pcireg.h>
/*
* ACPICA's rather gung-ho approach to hardware resource ownership is a little
* troublesome insofar as there is no easy way for us to know in advance
* exactly which I/O resources it's going to want to use.
*
* In order to deal with this, we ignore resource ownership entirely, and simply
* use the native I/O space accessor functionality. This is Evil, but it works.
*
* XXX use an intermediate #define for the tag/handle
*/
#ifdef __i386__
#define ACPI_BUS_SPACE_IO I386_BUS_SPACE_IO
#define ACPI_BUS_HANDLE 0
#endif
#ifdef __ia64__
#define ACPI_BUS_SPACE_IO IA64_BUS_SPACE_IO
#define ACPI_BUS_HANDLE 0
#endif
#ifdef __amd64__
#define ACPI_BUS_SPACE_IO AMD64_BUS_SPACE_IO
#define ACPI_BUS_HANDLE 0
#endif
ACPI_STATUS
AcpiOsReadPort(ACPI_IO_ADDRESS InPort, UINT32 *Value, UINT32 Width)
{
switch (Width) {
case 8:
*(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO,
ACPI_BUS_HANDLE, InPort);
break;
case 16:
*(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO,
ACPI_BUS_HANDLE, InPort);
break;
case 32:
*(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO,
ACPI_BUS_HANDLE, InPort);
break;
default:
/* debug trap goes here */
break;
}
return (AE_OK);
}
ACPI_STATUS
AcpiOsWritePort(ACPI_IO_ADDRESS OutPort, UINT32 Value, UINT32 Width)
{
switch (Width) {
case 8:
bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
break;
case 16:
bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
break;
case 32:
bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
break;
default:
/* debug trap goes here */
break;
}
return (AE_OK);
}
ACPI_STATUS
AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, void *Value,
UINT32 Width)
{
u_int32_t byte_width = Width / 8;
u_int32_t val;
if (!pci_cfgregopen())
return (AE_NOT_EXIST);
val = pci_cfgregread(PciId->Bus, PciId->Device, PciId->Function, Register,
byte_width);
switch (Width) {
case 8:
*(u_int8_t *)Value = val & 0xff;
break;
case 16:
*(u_int16_t *)Value = val & 0xffff;
break;
case 32:
*(u_int32_t *)Value = val;
break;
default:
/* debug trap goes here */
break;
}
return (AE_OK);
}
ACPI_STATUS
AcpiOsWritePciConfiguration (ACPI_PCI_ID *PciId, UINT32 Register,
ACPI_INTEGER Value, UINT32 Width)
{
u_int32_t byte_width = Width / 8;
if (!pci_cfgregopen())
return (AE_NOT_EXIST);
pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register,
Value, byte_width);
return (AE_OK);
}
/* XXX should use acpivar.h but too many include dependencies */
extern ACPI_STATUS acpi_GetInteger(ACPI_HANDLE handle, char *path, int
*number);
/*
* Depth-first recursive case for finding the bus, given the slot/function.
*/
static int
acpi_bus_number(ACPI_HANDLE root, ACPI_HANDLE curr, ACPI_PCI_ID *PciId)
{
ACPI_HANDLE parent;
ACPI_STATUS status;
ACPI_OBJECT_TYPE type;
UINT32 adr;
int bus, slot, func, class, subclass, header;
/* Try to get the _BBN object of the root, otherwise assume it is 0. */
bus = 0;
if (root == curr) {
status = acpi_GetInteger(root, "_BBN", &bus);
if (ACPI_FAILURE(status) && bootverbose)
printf("acpi_bus_number: root bus has no _BBN, assuming 0\n");
return (bus);
}
status = AcpiGetParent(curr, &parent);
if (ACPI_FAILURE(status))
return (bus);
/* First, recurse up the tree until we find the host bus. */
bus = acpi_bus_number(root, parent, PciId);
/* Validate parent bus device type. */
if (ACPI_FAILURE(AcpiGetType(parent, &type)) || type != ACPI_TYPE_DEVICE) {
printf("acpi_bus_number: not a device, type %d\n", type);
return (bus);
}
/* Get the parent's slot and function. */
status = acpi_GetInteger(parent, "_ADR", &adr);
if (ACPI_FAILURE(status)) {
printf("acpi_bus_number: can't get _ADR\n");
return (bus);
}
slot = ACPI_HIWORD(adr);
func = ACPI_LOWORD(adr);
/* Is this a PCI-PCI or Cardbus-PCI bridge? */
class = pci_cfgregread(bus, slot, func, PCIR_CLASS, 1);
if (class != PCIC_BRIDGE)
return (bus);
subclass = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 1);
/* Find the header type, masking off the multifunction bit. */
header = pci_cfgregread(bus, slot, func, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE;
if (header == PCIM_HDRTYPE_BRIDGE && subclass == PCIS_BRIDGE_PCI)
bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_1, 1);
if (header == PCIM_HDRTYPE_CARDBUS && subclass == PCIS_BRIDGE_CARDBUS)
bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_2, 1);
return (bus);
}
/*
* Find the bus number for a device
*
* rhandle: handle for the root bus
* chandle: handle for the device
* PciId: pointer to device slot and function, we fill out bus
*/
void
AcpiOsDerivePciId(ACPI_HANDLE rhandle, ACPI_HANDLE chandle, ACPI_PCI_ID **PciId)
{
ACPI_HANDLE parent;
ACPI_STATUS status;
int bus;
if (pci_cfgregopen() == 0)
panic("AcpiOsDerivePciId unable to initialize pci bus");
/* Try to read _BBN for bus number if we're at the root */
bus = 0;
if (rhandle == chandle) {
status = acpi_GetInteger(rhandle, "_BBN", &bus);
if (ACPI_FAILURE(status) && bootverbose)
printf("AcpiOsDerivePciId: root bus has no _BBN, assuming 0\n");
}
/*
* Get the parent handle and call the recursive case. It is not
* clear why we seem to be getting a chandle that points to a child
* of the desired slot/function but passing in the parent handle
* here works.
*/
if (ACPI_SUCCESS(AcpiGetParent(chandle, &parent)))
bus = acpi_bus_number(rhandle, parent, *PciId);
(*PciId)->Bus = bus;
if (bootverbose) {
printf("AcpiOsDerivePciId: bus %d dev %d func %d\n",
(*PciId)->Bus, (*PciId)->Device, (*PciId)->Function);
}
}
|
