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>
30 __FBSDID("$FreeBSD: releng/5.3/sys/dev/acpica/acpi_pci.c 133619 2004-08-13 06:21:58Z njl $");
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 "acpi.h"
40 #include <dev/acpica/acpivar.h>
41
42 #include <sys/pciio.h>
43 #include <dev/pci/pcireg.h>
44 #include <dev/pci/pcivar.h>
45 #include <dev/pci/pci_private.h>
46
47 #include "pcib_if.h"
48 #include "pci_if.h"
49
50 /* Hooks for the ACPI CA debugging infrastructure. */
51 #define _COMPONENT ACPI_BUS
52 ACPI_MODULE_NAME("PCI")
53
54 struct acpi_pci_devinfo {
55 struct pci_devinfo ap_dinfo;
56 ACPI_HANDLE ap_handle;
57 int ap_flags;
58 };
59
60 ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods");
61
62 static int acpi_pci_attach(device_t dev);
63 static int acpi_pci_child_location_str_method(device_t cbdev,
64 device_t child, char *buf, size_t buflen);
65 static int acpi_pci_probe(device_t dev);
66 static int acpi_pci_read_ivar(device_t dev, device_t child, int which,
67 uintptr_t *result);
68 static int acpi_pci_write_ivar(device_t dev, device_t child, int which,
69 uintptr_t value);
70 static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
71 void *context, void **status);
72 static int acpi_pci_set_powerstate_method(device_t dev, device_t child,
73 int state);
74 static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child);
75
76 static device_method_t acpi_pci_methods[] = {
77 /* Device interface */
78 DEVMETHOD(device_probe, acpi_pci_probe),
79 DEVMETHOD(device_attach, acpi_pci_attach),
80 DEVMETHOD(device_shutdown, bus_generic_shutdown),
81 DEVMETHOD(device_suspend, pci_suspend),
82 DEVMETHOD(device_resume, pci_resume),
83
84 /* Bus interface */
85 DEVMETHOD(bus_print_child, pci_print_child),
86 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch),
87 DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar),
88 DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar),
89 DEVMETHOD(bus_driver_added, pci_driver_added),
90 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
91 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
92
93 DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
94 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
95 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
96 DEVMETHOD(bus_delete_resource, pci_delete_resource),
97 DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
98 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
99 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
100 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
101 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method),
102 DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
103
104 /* PCI interface */
105 DEVMETHOD(pci_read_config, pci_read_config_method),
106 DEVMETHOD(pci_write_config, pci_write_config_method),
107 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
108 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
109 DEVMETHOD(pci_enable_io, pci_enable_io_method),
110 DEVMETHOD(pci_disable_io, pci_disable_io_method),
111 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
112 DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method),
113 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method),
114
115 { 0, 0 }
116 };
117
118 static driver_t acpi_pci_driver = {
119 "pci",
120 acpi_pci_methods,
121 0, /* no softc */
122 };
123
124 DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
125 MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
126 MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
127 MODULE_VERSION(acpi_pci, 1);
128
129 static int
130 acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
131 {
132 struct acpi_pci_devinfo *dinfo;
133
134 dinfo = device_get_ivars(child);
135 switch (which) {
136 case ACPI_IVAR_HANDLE:
137 *result = (uintptr_t)dinfo->ap_handle;
138 return (0);
139 case ACPI_IVAR_FLAGS:
140 *result = (uintptr_t)dinfo->ap_flags;
141 return (0);
142 }
143 return (pci_read_ivar(dev, child, which, result));
144 }
145
146 static int
147 acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
148 {
149 struct acpi_pci_devinfo *dinfo;
150
151 dinfo = device_get_ivars(child);
152 switch (which) {
153 case ACPI_IVAR_HANDLE:
154 dinfo->ap_handle = (ACPI_HANDLE)value;
155 return (0);
156 case ACPI_IVAR_FLAGS:
157 dinfo->ap_flags = (int)value;
158 return (0);
159 }
160 return (pci_write_ivar(dev, child, which, value));
161 }
162
163 static int
164 acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
165 size_t buflen)
166 {
167 struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
168
169 pci_child_location_str_method(cbdev, child, buf, buflen);
170
171 if (dinfo->ap_handle) {
172 strlcat(buf, " handle=", buflen);
173 strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
174 }
175 return (0);
176 }
177
178 /*
179 * PCI power manangement
180 */
181 static int
182 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
183 {
184 ACPI_HANDLE h;
185 ACPI_STATUS status;
186 int acpi_state, old_state, error;
187
188 error = 0;
189 switch (state) {
190 case PCI_POWERSTATE_D0:
191 acpi_state = ACPI_STATE_D0;
192 break;
193 case PCI_POWERSTATE_D1:
194 acpi_state = ACPI_STATE_D1;
195 break;
196 case PCI_POWERSTATE_D2:
197 acpi_state = ACPI_STATE_D2;
198 break;
199 case PCI_POWERSTATE_D3:
200 acpi_state = ACPI_STATE_D3;
201 break;
202 default:
203 return (EINVAL);
204 }
205
206 /*
207 * We set the state using PCI Power Management outside of setting
208 * the ACPI state. This means that when powering down a device, we
209 * first shut it down using PCI, and then using ACPI, which lets ACPI
210 * try to power down any Power Resources that are now no longer used.
211 * When powering up a device, we let ACPI set the state first so that
212 * it can enable any needed Power Resources before changing the PCI
213 * power state.
214 */
215 ACPI_SERIAL_BEGIN(pci_powerstate);
216 old_state = pci_get_powerstate(child);
217 if (old_state < state) {
218 error = pci_set_powerstate_method(dev, child, state);
219 if (error)
220 goto out;
221 }
222 h = acpi_get_handle(child);
223 status = acpi_pwr_switch_consumer(h, acpi_state);
224 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
225 device_printf(dev,
226 "Failed to set ACPI power state D%d on %s: %s\n",
227 acpi_state, acpi_name(h), AcpiFormatException(status));
228 if (old_state > state)
229 error = pci_set_powerstate_method(dev, child, state);
230
231 out:
232 ACPI_SERIAL_END(pci_powerstate);
233 return (error);
234 }
235
236 static void
237 acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child)
238 {
239 ACPI_STATUS status;
240 device_t child;
241
242 /*
243 * Lookup and remove the unused device that acpi0 creates when it walks
244 * the namespace creating devices.
245 */
246 child = acpi_get_device(handle);
247 if (child != NULL) {
248 KASSERT(!device_is_alive(child), ("%s: deleting alive child %s",
249 __func__, device_get_nameunit(child)));
250 KASSERT(device_get_parent(child) ==
251 devclass_get_device(devclass_find("acpi"), 0),
252 ("%s: child (%s)'s parent is not acpi0", __func__,
253 acpi_name(handle)));
254 device_delete_child(device_get_parent(child), child);
255 }
256
257 /*
258 * Update ACPI-CA to use the PCI enumerated device_t for this handle.
259 */
260 status = AcpiDetachData(handle, acpi_fake_objhandler);
261 if (ACPI_FAILURE(status))
262 printf("WARNING: Unable to detach object data from %s - %s\n",
263 acpi_name(handle), AcpiFormatException(status));
264 status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child);
265 if (ACPI_FAILURE(status))
266 printf("WARNING: Unable to attach object data to %s - %s\n",
267 acpi_name(handle), AcpiFormatException(status));
268 }
269
270 static ACPI_STATUS
271 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
272 void **status)
273 {
274 struct acpi_pci_devinfo *dinfo;
275 device_t *devlist;
276 int devcount, i, func, slot;
277 UINT32 address;
278
279 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
280
281 if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
282 return_ACPI_STATUS (AE_OK);
283 slot = address >> 16;
284 func = address & 0xffff;
285 if (device_get_children((device_t)context, &devlist, &devcount) != 0)
286 return_ACPI_STATUS (AE_OK);
287 for (i = 0; i < devcount; i++) {
288 dinfo = device_get_ivars(devlist[i]);
289 if (dinfo->ap_dinfo.cfg.func == func &&
290 dinfo->ap_dinfo.cfg.slot == slot) {
291 dinfo->ap_handle = handle;
292 acpi_pci_update_device(handle, devlist[i]);
293 break;
294 }
295 }
296 free(devlist, M_TEMP);
297 return_ACPI_STATUS (AE_OK);
298 }
299
300 static int
301 acpi_pci_probe(device_t dev)
302 {
303
304 if (pcib_get_bus(dev) < 0)
305 return (ENXIO);
306 if (acpi_get_handle(dev) == NULL)
307 return (ENXIO);
308 device_set_desc(dev, "ACPI PCI bus");
309 return (0);
310 }
311
312 static int
313 acpi_pci_attach(device_t dev)
314 {
315 int busno;
316
317 /*
318 * Since there can be multiple independantly numbered PCI
319 * busses on some large alpha systems, we can't use the unit
320 * number to decide what bus we are probing. We ask the parent
321 * pcib what our bus number is.
322 */
323 busno = pcib_get_bus(dev);
324 if (bootverbose)
325 device_printf(dev, "physical bus=%d\n", busno);
326
327 /*
328 * First, PCI devices are added as in the normal PCI bus driver.
329 * Afterwards, the ACPI namespace under the bridge driver is
330 * walked to save ACPI handles to all the devices that appear in
331 * the ACPI namespace as immediate descendants of the bridge.
332 *
333 * XXX: Sometimes PCI devices show up in the ACPI namespace that
334 * pci_add_children() doesn't find. We currently just ignore
335 * these devices.
336 */
337 pci_add_children(dev, busno, sizeof(struct acpi_pci_devinfo));
338 AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
339 acpi_pci_save_handle, dev, NULL);
340
341 return (bus_generic_attach(dev));
342 }
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