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/10.1/sys/dev/acpica/acpi_pci.c 259512 2013-12-17 13:49:35Z kib $");
31
32 #include "opt_acpi.h"
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/bus.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
40
41 #include <contrib/dev/acpica/include/acpi.h>
42 #include <contrib/dev/acpica/include/accommon.h>
43
44 #include <dev/acpica/acpivar.h>
45
46 #include <sys/pciio.h>
47 #include <dev/pci/pcireg.h>
48 #include <dev/pci/pcivar.h>
49 #include <dev/pci/pci_private.h>
50
51 #include "pcib_if.h"
52 #include "pci_if.h"
53
54 /* Hooks for the ACPI CA debugging infrastructure. */
55 #define _COMPONENT ACPI_BUS
56 ACPI_MODULE_NAME("PCI")
57
58 struct acpi_pci_devinfo {
59 struct pci_devinfo ap_dinfo;
60 ACPI_HANDLE ap_handle;
61 int ap_flags;
62 };
63
64 ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods");
65
66 /* Be sure that ACPI and PCI power states are equivalent. */
67 CTASSERT(ACPI_STATE_D0 == PCI_POWERSTATE_D0);
68 CTASSERT(ACPI_STATE_D1 == PCI_POWERSTATE_D1);
69 CTASSERT(ACPI_STATE_D2 == PCI_POWERSTATE_D2);
70 CTASSERT(ACPI_STATE_D3 == PCI_POWERSTATE_D3);
71
72 static int acpi_pci_attach(device_t dev);
73 static int acpi_pci_child_location_str_method(device_t cbdev,
74 device_t child, char *buf, size_t buflen);
75 static int acpi_pci_probe(device_t dev);
76 static int acpi_pci_read_ivar(device_t dev, device_t child, int which,
77 uintptr_t *result);
78 static int acpi_pci_write_ivar(device_t dev, device_t child, int which,
79 uintptr_t value);
80 static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
81 void *context, void **status);
82 static int acpi_pci_set_powerstate_method(device_t dev, device_t child,
83 int state);
84 static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child);
85 static bus_dma_tag_t acpi_pci_get_dma_tag(device_t bus, device_t child);
86
87 static device_method_t acpi_pci_methods[] = {
88 /* Device interface */
89 DEVMETHOD(device_probe, acpi_pci_probe),
90 DEVMETHOD(device_attach, acpi_pci_attach),
91
92 /* Bus interface */
93 DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar),
94 DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar),
95 DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
96 DEVMETHOD(bus_get_dma_tag, acpi_pci_get_dma_tag),
97
98 /* PCI interface */
99 DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method),
100
101 DEVMETHOD_END
102 };
103
104 static devclass_t pci_devclass;
105
106 DEFINE_CLASS_1(pci, acpi_pci_driver, acpi_pci_methods, sizeof(struct pci_softc),
107 pci_driver);
108 DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
109 MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
110 MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
111 MODULE_VERSION(acpi_pci, 1);
112
113 static int
114 acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
115 {
116 struct acpi_pci_devinfo *dinfo;
117
118 dinfo = device_get_ivars(child);
119 switch (which) {
120 case ACPI_IVAR_HANDLE:
121 *result = (uintptr_t)dinfo->ap_handle;
122 return (0);
123 case ACPI_IVAR_FLAGS:
124 *result = (uintptr_t)dinfo->ap_flags;
125 return (0);
126 }
127 return (pci_read_ivar(dev, child, which, result));
128 }
129
130 static int
131 acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
132 {
133 struct acpi_pci_devinfo *dinfo;
134
135 dinfo = device_get_ivars(child);
136 switch (which) {
137 case ACPI_IVAR_HANDLE:
138 dinfo->ap_handle = (ACPI_HANDLE)value;
139 return (0);
140 case ACPI_IVAR_FLAGS:
141 dinfo->ap_flags = (int)value;
142 return (0);
143 }
144 return (pci_write_ivar(dev, child, which, value));
145 }
146
147 static int
148 acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
149 size_t buflen)
150 {
151 struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
152
153 pci_child_location_str_method(cbdev, child, buf, buflen);
154
155 if (dinfo->ap_handle) {
156 strlcat(buf, " handle=", buflen);
157 strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
158 }
159 return (0);
160 }
161
162 /*
163 * PCI power manangement
164 */
165 static int
166 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
167 {
168 ACPI_HANDLE h;
169 ACPI_STATUS status;
170 int old_state, error;
171
172 error = 0;
173 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
174 return (EINVAL);
175
176 /*
177 * We set the state using PCI Power Management outside of setting
178 * the ACPI state. This means that when powering down a device, we
179 * first shut it down using PCI, and then using ACPI, which lets ACPI
180 * try to power down any Power Resources that are now no longer used.
181 * When powering up a device, we let ACPI set the state first so that
182 * it can enable any needed Power Resources before changing the PCI
183 * power state.
184 */
185 ACPI_SERIAL_BEGIN(pci_powerstate);
186 old_state = pci_get_powerstate(child);
187 if (old_state < state && pci_do_power_suspend) {
188 error = pci_set_powerstate_method(dev, child, state);
189 if (error)
190 goto out;
191 }
192 h = acpi_get_handle(child);
193 status = acpi_pwr_switch_consumer(h, state);
194 if (ACPI_SUCCESS(status)) {
195 if (bootverbose)
196 device_printf(dev, "set ACPI power state D%d on %s\n",
197 state, acpi_name(h));
198 } else if (status != AE_NOT_FOUND)
199 device_printf(dev,
200 "failed to set ACPI power state D%d on %s: %s\n",
201 state, acpi_name(h), AcpiFormatException(status));
202 if (old_state > state && pci_do_power_resume)
203 error = pci_set_powerstate_method(dev, child, state);
204
205 out:
206 ACPI_SERIAL_END(pci_powerstate);
207 return (error);
208 }
209
210 static void
211 acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child)
212 {
213 ACPI_STATUS status;
214 device_t child;
215
216 /*
217 * Occasionally a PCI device may show up as an ACPI device
218 * with a _HID. (For example, the TabletPC TC1000 has a
219 * second PCI-ISA bridge that has a _HID for an
220 * acpi_sysresource device.) In that case, leave ACPI-CA's
221 * device data pointing at the ACPI-enumerated device.
222 */
223 child = acpi_get_device(handle);
224 if (child != NULL) {
225 KASSERT(device_get_parent(child) ==
226 devclass_get_device(devclass_find("acpi"), 0),
227 ("%s: child (%s)'s parent is not acpi0", __func__,
228 acpi_name(handle)));
229 return;
230 }
231
232 /*
233 * Update ACPI-CA to use the PCI enumerated device_t for this handle.
234 */
235 status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child);
236 if (ACPI_FAILURE(status))
237 printf("WARNING: Unable to attach object data to %s - %s\n",
238 acpi_name(handle), AcpiFormatException(status));
239 }
240
241 static ACPI_STATUS
242 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
243 void **status)
244 {
245 struct acpi_pci_devinfo *dinfo;
246 device_t *devlist;
247 int devcount, i, func, slot;
248 UINT32 address;
249
250 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
251
252 if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
253 return_ACPI_STATUS (AE_OK);
254 slot = ACPI_ADR_PCI_SLOT(address);
255 func = ACPI_ADR_PCI_FUNC(address);
256 if (device_get_children((device_t)context, &devlist, &devcount) != 0)
257 return_ACPI_STATUS (AE_OK);
258 for (i = 0; i < devcount; i++) {
259 dinfo = device_get_ivars(devlist[i]);
260 if (dinfo->ap_dinfo.cfg.func == func &&
261 dinfo->ap_dinfo.cfg.slot == slot) {
262 dinfo->ap_handle = handle;
263 acpi_pci_update_device(handle, devlist[i]);
264 break;
265 }
266 }
267 free(devlist, M_TEMP);
268 return_ACPI_STATUS (AE_OK);
269 }
270
271 static int
272 acpi_pci_probe(device_t dev)
273 {
274
275 if (acpi_get_handle(dev) == NULL)
276 return (ENXIO);
277 device_set_desc(dev, "ACPI PCI bus");
278 return (0);
279 }
280
281 static int
282 acpi_pci_attach(device_t dev)
283 {
284 int busno, domain, error;
285
286 error = pci_attach_common(dev);
287 if (error)
288 return (error);
289
290 /*
291 * Since there can be multiple independantly numbered PCI
292 * busses on systems with multiple PCI domains, we can't use
293 * the unit number to decide which bus we are probing. We ask
294 * the parent pcib what our domain and bus numbers are.
295 */
296 domain = pcib_get_domain(dev);
297 busno = pcib_get_bus(dev);
298
299 /*
300 * First, PCI devices are added as in the normal PCI bus driver.
301 * Afterwards, the ACPI namespace under the bridge driver is
302 * walked to save ACPI handles to all the devices that appear in
303 * the ACPI namespace as immediate descendants of the bridge.
304 *
305 * XXX: Sometimes PCI devices show up in the ACPI namespace that
306 * pci_add_children() doesn't find. We currently just ignore
307 * these devices.
308 */
309 pci_add_children(dev, domain, busno, sizeof(struct acpi_pci_devinfo));
310 AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
311 acpi_pci_save_handle, NULL, dev, NULL);
312
313 return (bus_generic_attach(dev));
314 }
315
316 #ifdef ACPI_DMAR
317 bus_dma_tag_t dmar_get_dma_tag(device_t dev, device_t child);
318 static bus_dma_tag_t
319 acpi_pci_get_dma_tag(device_t bus, device_t child)
320 {
321 bus_dma_tag_t tag;
322
323 if (device_get_parent(child) == bus) {
324 /* try dmar and return if it works */
325 tag = dmar_get_dma_tag(bus, child);
326 } else
327 tag = NULL;
328 if (tag == NULL)
329 tag = pci_get_dma_tag(bus, child);
330 return (tag);
331 }
332 #else
333 static bus_dma_tag_t
334 acpi_pci_get_dma_tag(device_t bus, device_t child)
335 {
336
337 return (pci_get_dma_tag(bus, child));
338 }
339 #endif
Cache object: af55a79070481c05494b978cfcca97c9
|