1/*-
2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
3 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000, BSDi
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
12 * disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
3 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000, BSDi
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
12 * disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
|
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/bus.h>
35#include <sys/kernel.h>
36#include <sys/malloc.h>
37#include <sys/module.h>
38
39#include <contrib/dev/acpica/include/acpi.h>
40#include <contrib/dev/acpica/include/accommon.h>
41
42#include <dev/acpica/acpivar.h>
43
44#include <sys/pciio.h>
45#include <dev/pci/pcireg.h>
46#include <dev/pci/pcivar.h>
47#include <dev/pci/pci_private.h>
48
49#include "pcib_if.h"
50#include "pci_if.h"
51
52/* Hooks for the ACPI CA debugging infrastructure. */
53#define _COMPONENT ACPI_BUS
54ACPI_MODULE_NAME("PCI")
55
56struct acpi_pci_devinfo {
57 struct pci_devinfo ap_dinfo;
58 ACPI_HANDLE ap_handle;
59 int ap_flags;
60};
61
62ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods");
63
64/* Be sure that ACPI and PCI power states are equivalent. */
65CTASSERT(ACPI_STATE_D0 == PCI_POWERSTATE_D0);
66CTASSERT(ACPI_STATE_D1 == PCI_POWERSTATE_D1);
67CTASSERT(ACPI_STATE_D2 == PCI_POWERSTATE_D2);
68CTASSERT(ACPI_STATE_D3 == PCI_POWERSTATE_D3);
69
70static int acpi_pci_attach(device_t dev);
71static int acpi_pci_child_location_str_method(device_t cbdev,
72 device_t child, char *buf, size_t buflen);
73static int acpi_pci_probe(device_t dev);
74static int acpi_pci_read_ivar(device_t dev, device_t child, int which,
75 uintptr_t *result);
76static int acpi_pci_write_ivar(device_t dev, device_t child, int which,
77 uintptr_t value);
78static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
79 void *context, void **status);
80static int acpi_pci_set_powerstate_method(device_t dev, device_t child,
81 int state);
82static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child);
83
84static device_method_t acpi_pci_methods[] = {
85 /* Device interface */
86 DEVMETHOD(device_probe, acpi_pci_probe),
87 DEVMETHOD(device_attach, acpi_pci_attach),
88
89 /* Bus interface */
90 DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar),
91 DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar),
92 DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
93
94 /* PCI interface */
95 DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method),
96
97 { 0, 0 }
98};
99
100static devclass_t pci_devclass;
101
102DEFINE_CLASS_1(pci, acpi_pci_driver, acpi_pci_methods, 0, pci_driver);
103DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
104MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
105MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
106MODULE_VERSION(acpi_pci, 1);
107
108static int
109acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
110{
111 struct acpi_pci_devinfo *dinfo;
112
113 dinfo = device_get_ivars(child);
114 switch (which) {
115 case ACPI_IVAR_HANDLE:
116 *result = (uintptr_t)dinfo->ap_handle;
117 return (0);
118 case ACPI_IVAR_FLAGS:
119 *result = (uintptr_t)dinfo->ap_flags;
120 return (0);
121 }
122 return (pci_read_ivar(dev, child, which, result));
123}
124
125static int
126acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
127{
128 struct acpi_pci_devinfo *dinfo;
129
130 dinfo = device_get_ivars(child);
131 switch (which) {
132 case ACPI_IVAR_HANDLE:
133 dinfo->ap_handle = (ACPI_HANDLE)value;
134 return (0);
135 case ACPI_IVAR_FLAGS:
136 dinfo->ap_flags = (int)value;
137 return (0);
138 }
139 return (pci_write_ivar(dev, child, which, value));
140}
141
142static int
143acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
144 size_t buflen)
145{
146 struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
147
148 pci_child_location_str_method(cbdev, child, buf, buflen);
149
150 if (dinfo->ap_handle) {
151 strlcat(buf, " handle=", buflen);
152 strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
153 }
154 return (0);
155}
156
157/*
158 * PCI power manangement
159 */
160static int
161acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
162{
163 ACPI_HANDLE h;
164 ACPI_STATUS status;
165 int old_state, error;
166
167 error = 0;
168 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
169 return (EINVAL);
170
171 /*
172 * We set the state using PCI Power Management outside of setting
173 * the ACPI state. This means that when powering down a device, we
174 * first shut it down using PCI, and then using ACPI, which lets ACPI
175 * try to power down any Power Resources that are now no longer used.
176 * When powering up a device, we let ACPI set the state first so that
177 * it can enable any needed Power Resources before changing the PCI
178 * power state.
179 */
180 ACPI_SERIAL_BEGIN(pci_powerstate);
181 old_state = pci_get_powerstate(child);
182 if (old_state < state) {
183 error = pci_set_powerstate_method(dev, child, state);
184 if (error)
185 goto out;
186 }
187 h = acpi_get_handle(child);
188 status = acpi_pwr_switch_consumer(h, state);
189 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
190 device_printf(dev,
191 "Failed to set ACPI power state D%d on %s: %s\n",
192 state, acpi_name(h), AcpiFormatException(status));
193 if (old_state > state)
194 error = pci_set_powerstate_method(dev, child, state);
195
196out:
197 ACPI_SERIAL_END(pci_powerstate);
198 return (error);
199}
200
201static void
202acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child)
203{
204 ACPI_STATUS status;
205 device_t child;
206
207 /*
208 * Lookup and remove the unused device that acpi0 creates when it walks
209 * the namespace creating devices.
210 */
211 child = acpi_get_device(handle);
212 if (child != NULL) {
213 if (device_is_alive(child)) {
214 /*
215 * The TabletPC TC1000 has a second PCI-ISA bridge
216 * that has a _HID for an acpi_sysresource device.
217 * In that case, leave ACPI-CA's device data pointing
218 * at the ACPI-enumerated device.
219 */
220 device_printf(child,
221 "Conflicts with PCI device %d:%d:%d\n",
222 pci_get_bus(pci_child), pci_get_slot(pci_child),
223 pci_get_function(pci_child));
224 return;
225 }
226 KASSERT(device_get_parent(child) ==
227 devclass_get_device(devclass_find("acpi"), 0),
228 ("%s: child (%s)'s parent is not acpi0", __func__,
229 acpi_name(handle)));
230 device_delete_child(device_get_parent(child), child);
231 }
232
233 /*
234 * Update ACPI-CA to use the PCI enumerated device_t for this handle.
235 */
236 status = AcpiDetachData(handle, acpi_fake_objhandler);
237 if (ACPI_FAILURE(status))
238 printf("WARNING: Unable to detach object data from %s - %s\n",
239 acpi_name(handle), AcpiFormatException(status));
240 status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child);
241 if (ACPI_FAILURE(status))
242 printf("WARNING: Unable to attach object data to %s - %s\n",
243 acpi_name(handle), AcpiFormatException(status));
244}
245
246static ACPI_STATUS
247acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
248 void **status)
249{
250 struct acpi_pci_devinfo *dinfo;
251 device_t *devlist;
252 int devcount, i, func, slot;
253 UINT32 address;
254
255 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
256
257 if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
258 return_ACPI_STATUS (AE_OK);
259 slot = ACPI_ADR_PCI_SLOT(address);
260 func = ACPI_ADR_PCI_FUNC(address);
261 if (device_get_children((device_t)context, &devlist, &devcount) != 0)
262 return_ACPI_STATUS (AE_OK);
263 for (i = 0; i < devcount; i++) {
264 dinfo = device_get_ivars(devlist[i]);
265 if (dinfo->ap_dinfo.cfg.func == func &&
266 dinfo->ap_dinfo.cfg.slot == slot) {
267 dinfo->ap_handle = handle;
268 acpi_pci_update_device(handle, devlist[i]);
269 break;
270 }
271 }
272 free(devlist, M_TEMP);
273 return_ACPI_STATUS (AE_OK);
274}
275
276static int
277acpi_pci_probe(device_t dev)
278{
279
280 if (pcib_get_bus(dev) < 0)
281 return (ENXIO);
282 if (acpi_get_handle(dev) == NULL)
283 return (ENXIO);
284 device_set_desc(dev, "ACPI PCI bus");
285 return (0);
286}
287
288static int
289acpi_pci_attach(device_t dev)
290{
291 int busno, domain;
292
293 /*
294 * Since there can be multiple independantly numbered PCI
295 * busses on systems with multiple PCI domains, we can't use
296 * the unit number to decide which bus we are probing. We ask
297 * the parent pcib what our domain and bus numbers are.
298 */
299 domain = pcib_get_domain(dev);
300 busno = pcib_get_bus(dev);
301 if (bootverbose)
302 device_printf(dev, "domain=%d, physical bus=%d\n",
303 domain, busno);
304
305 /*
306 * First, PCI devices are added as in the normal PCI bus driver.
307 * Afterwards, the ACPI namespace under the bridge driver is
308 * walked to save ACPI handles to all the devices that appear in
309 * the ACPI namespace as immediate descendants of the bridge.
310 *
311 * XXX: Sometimes PCI devices show up in the ACPI namespace that
312 * pci_add_children() doesn't find. We currently just ignore
313 * these devices.
314 */
315 pci_add_children(dev, domain, busno, sizeof(struct acpi_pci_devinfo));
316 AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
| 31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/bus.h>
35#include <sys/kernel.h>
36#include <sys/malloc.h>
37#include <sys/module.h>
38
39#include <contrib/dev/acpica/include/acpi.h>
40#include <contrib/dev/acpica/include/accommon.h>
41
42#include <dev/acpica/acpivar.h>
43
44#include <sys/pciio.h>
45#include <dev/pci/pcireg.h>
46#include <dev/pci/pcivar.h>
47#include <dev/pci/pci_private.h>
48
49#include "pcib_if.h"
50#include "pci_if.h"
51
52/* Hooks for the ACPI CA debugging infrastructure. */
53#define _COMPONENT ACPI_BUS
54ACPI_MODULE_NAME("PCI")
55
56struct acpi_pci_devinfo {
57 struct pci_devinfo ap_dinfo;
58 ACPI_HANDLE ap_handle;
59 int ap_flags;
60};
61
62ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods");
63
64/* Be sure that ACPI and PCI power states are equivalent. */
65CTASSERT(ACPI_STATE_D0 == PCI_POWERSTATE_D0);
66CTASSERT(ACPI_STATE_D1 == PCI_POWERSTATE_D1);
67CTASSERT(ACPI_STATE_D2 == PCI_POWERSTATE_D2);
68CTASSERT(ACPI_STATE_D3 == PCI_POWERSTATE_D3);
69
70static int acpi_pci_attach(device_t dev);
71static int acpi_pci_child_location_str_method(device_t cbdev,
72 device_t child, char *buf, size_t buflen);
73static int acpi_pci_probe(device_t dev);
74static int acpi_pci_read_ivar(device_t dev, device_t child, int which,
75 uintptr_t *result);
76static int acpi_pci_write_ivar(device_t dev, device_t child, int which,
77 uintptr_t value);
78static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
79 void *context, void **status);
80static int acpi_pci_set_powerstate_method(device_t dev, device_t child,
81 int state);
82static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child);
83
84static device_method_t acpi_pci_methods[] = {
85 /* Device interface */
86 DEVMETHOD(device_probe, acpi_pci_probe),
87 DEVMETHOD(device_attach, acpi_pci_attach),
88
89 /* Bus interface */
90 DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar),
91 DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar),
92 DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
93
94 /* PCI interface */
95 DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method),
96
97 { 0, 0 }
98};
99
100static devclass_t pci_devclass;
101
102DEFINE_CLASS_1(pci, acpi_pci_driver, acpi_pci_methods, 0, pci_driver);
103DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
104MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
105MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
106MODULE_VERSION(acpi_pci, 1);
107
108static int
109acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
110{
111 struct acpi_pci_devinfo *dinfo;
112
113 dinfo = device_get_ivars(child);
114 switch (which) {
115 case ACPI_IVAR_HANDLE:
116 *result = (uintptr_t)dinfo->ap_handle;
117 return (0);
118 case ACPI_IVAR_FLAGS:
119 *result = (uintptr_t)dinfo->ap_flags;
120 return (0);
121 }
122 return (pci_read_ivar(dev, child, which, result));
123}
124
125static int
126acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
127{
128 struct acpi_pci_devinfo *dinfo;
129
130 dinfo = device_get_ivars(child);
131 switch (which) {
132 case ACPI_IVAR_HANDLE:
133 dinfo->ap_handle = (ACPI_HANDLE)value;
134 return (0);
135 case ACPI_IVAR_FLAGS:
136 dinfo->ap_flags = (int)value;
137 return (0);
138 }
139 return (pci_write_ivar(dev, child, which, value));
140}
141
142static int
143acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
144 size_t buflen)
145{
146 struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
147
148 pci_child_location_str_method(cbdev, child, buf, buflen);
149
150 if (dinfo->ap_handle) {
151 strlcat(buf, " handle=", buflen);
152 strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
153 }
154 return (0);
155}
156
157/*
158 * PCI power manangement
159 */
160static int
161acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
162{
163 ACPI_HANDLE h;
164 ACPI_STATUS status;
165 int old_state, error;
166
167 error = 0;
168 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
169 return (EINVAL);
170
171 /*
172 * We set the state using PCI Power Management outside of setting
173 * the ACPI state. This means that when powering down a device, we
174 * first shut it down using PCI, and then using ACPI, which lets ACPI
175 * try to power down any Power Resources that are now no longer used.
176 * When powering up a device, we let ACPI set the state first so that
177 * it can enable any needed Power Resources before changing the PCI
178 * power state.
179 */
180 ACPI_SERIAL_BEGIN(pci_powerstate);
181 old_state = pci_get_powerstate(child);
182 if (old_state < state) {
183 error = pci_set_powerstate_method(dev, child, state);
184 if (error)
185 goto out;
186 }
187 h = acpi_get_handle(child);
188 status = acpi_pwr_switch_consumer(h, state);
189 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
190 device_printf(dev,
191 "Failed to set ACPI power state D%d on %s: %s\n",
192 state, acpi_name(h), AcpiFormatException(status));
193 if (old_state > state)
194 error = pci_set_powerstate_method(dev, child, state);
195
196out:
197 ACPI_SERIAL_END(pci_powerstate);
198 return (error);
199}
200
201static void
202acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child)
203{
204 ACPI_STATUS status;
205 device_t child;
206
207 /*
208 * Lookup and remove the unused device that acpi0 creates when it walks
209 * the namespace creating devices.
210 */
211 child = acpi_get_device(handle);
212 if (child != NULL) {
213 if (device_is_alive(child)) {
214 /*
215 * The TabletPC TC1000 has a second PCI-ISA bridge
216 * that has a _HID for an acpi_sysresource device.
217 * In that case, leave ACPI-CA's device data pointing
218 * at the ACPI-enumerated device.
219 */
220 device_printf(child,
221 "Conflicts with PCI device %d:%d:%d\n",
222 pci_get_bus(pci_child), pci_get_slot(pci_child),
223 pci_get_function(pci_child));
224 return;
225 }
226 KASSERT(device_get_parent(child) ==
227 devclass_get_device(devclass_find("acpi"), 0),
228 ("%s: child (%s)'s parent is not acpi0", __func__,
229 acpi_name(handle)));
230 device_delete_child(device_get_parent(child), child);
231 }
232
233 /*
234 * Update ACPI-CA to use the PCI enumerated device_t for this handle.
235 */
236 status = AcpiDetachData(handle, acpi_fake_objhandler);
237 if (ACPI_FAILURE(status))
238 printf("WARNING: Unable to detach object data from %s - %s\n",
239 acpi_name(handle), AcpiFormatException(status));
240 status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child);
241 if (ACPI_FAILURE(status))
242 printf("WARNING: Unable to attach object data to %s - %s\n",
243 acpi_name(handle), AcpiFormatException(status));
244}
245
246static ACPI_STATUS
247acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
248 void **status)
249{
250 struct acpi_pci_devinfo *dinfo;
251 device_t *devlist;
252 int devcount, i, func, slot;
253 UINT32 address;
254
255 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
256
257 if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
258 return_ACPI_STATUS (AE_OK);
259 slot = ACPI_ADR_PCI_SLOT(address);
260 func = ACPI_ADR_PCI_FUNC(address);
261 if (device_get_children((device_t)context, &devlist, &devcount) != 0)
262 return_ACPI_STATUS (AE_OK);
263 for (i = 0; i < devcount; i++) {
264 dinfo = device_get_ivars(devlist[i]);
265 if (dinfo->ap_dinfo.cfg.func == func &&
266 dinfo->ap_dinfo.cfg.slot == slot) {
267 dinfo->ap_handle = handle;
268 acpi_pci_update_device(handle, devlist[i]);
269 break;
270 }
271 }
272 free(devlist, M_TEMP);
273 return_ACPI_STATUS (AE_OK);
274}
275
276static int
277acpi_pci_probe(device_t dev)
278{
279
280 if (pcib_get_bus(dev) < 0)
281 return (ENXIO);
282 if (acpi_get_handle(dev) == NULL)
283 return (ENXIO);
284 device_set_desc(dev, "ACPI PCI bus");
285 return (0);
286}
287
288static int
289acpi_pci_attach(device_t dev)
290{
291 int busno, domain;
292
293 /*
294 * Since there can be multiple independantly numbered PCI
295 * busses on systems with multiple PCI domains, we can't use
296 * the unit number to decide which bus we are probing. We ask
297 * the parent pcib what our domain and bus numbers are.
298 */
299 domain = pcib_get_domain(dev);
300 busno = pcib_get_bus(dev);
301 if (bootverbose)
302 device_printf(dev, "domain=%d, physical bus=%d\n",
303 domain, busno);
304
305 /*
306 * First, PCI devices are added as in the normal PCI bus driver.
307 * Afterwards, the ACPI namespace under the bridge driver is
308 * walked to save ACPI handles to all the devices that appear in
309 * the ACPI namespace as immediate descendants of the bridge.
310 *
311 * XXX: Sometimes PCI devices show up in the ACPI namespace that
312 * pci_add_children() doesn't find. We currently just ignore
313 * these devices.
314 */
315 pci_add_children(dev, domain, busno, sizeof(struct acpi_pci_devinfo));
316 AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
|