2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
3 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000, BSDi
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
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.
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.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
41 #include <contrib/dev/acpica/include/acpi.h>
42 #include <contrib/dev/acpica/include/accommon.h>
44 #include <dev/acpica/acpivar.h>
46 #include <sys/pciio.h>
47 #include <dev/pci/pcireg.h>
48 #include <dev/pci/pcivar.h>
49 #include <dev/pci/pci_private.h>
54 /* Hooks for the ACPI CA debugging infrastructure. */
55 #define _COMPONENT ACPI_BUS
56 ACPI_MODULE_NAME("PCI")
58 struct acpi_pci_devinfo {
59 struct pci_devinfo ap_dinfo;
60 ACPI_HANDLE ap_handle;
64 ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods");
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);
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,
78 static int acpi_pci_write_ivar(device_t dev, device_t child, int which,
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,
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);
88 static device_t acpi_pci_create_iov_child(device_t bus, device_t pf,
89 uint16_t rid, uint16_t vid, uint16_t did);
92 static device_method_t acpi_pci_methods[] = {
93 /* Device interface */
94 DEVMETHOD(device_probe, acpi_pci_probe),
95 DEVMETHOD(device_attach, acpi_pci_attach),
98 DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar),
99 DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar),
100 DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
101 DEVMETHOD(bus_get_dma_tag, acpi_pci_get_dma_tag),
102 DEVMETHOD(bus_get_domain, acpi_get_domain),
105 DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method),
107 DEVMETHOD(pci_create_iov_child, acpi_pci_create_iov_child),
113 static devclass_t pci_devclass;
115 DEFINE_CLASS_1(pci, acpi_pci_driver, acpi_pci_methods, sizeof(struct pci_softc),
117 DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
118 MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
119 MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
120 MODULE_VERSION(acpi_pci, 1);
123 acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
125 struct acpi_pci_devinfo *dinfo;
127 dinfo = device_get_ivars(child);
129 case ACPI_IVAR_HANDLE:
130 *result = (uintptr_t)dinfo->ap_handle;
132 case ACPI_IVAR_FLAGS:
133 *result = (uintptr_t)dinfo->ap_flags;
136 return (pci_read_ivar(dev, child, which, result));
140 acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
142 struct acpi_pci_devinfo *dinfo;
144 dinfo = device_get_ivars(child);
146 case ACPI_IVAR_HANDLE:
147 dinfo->ap_handle = (ACPI_HANDLE)value;
149 case ACPI_IVAR_FLAGS:
150 dinfo->ap_flags = (int)value;
153 return (pci_write_ivar(dev, child, which, value));
157 acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
160 struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
164 pci_child_location_str_method(cbdev, child, buf, buflen);
166 if (dinfo->ap_handle) {
167 strlcat(buf, " handle=", buflen);
168 strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
170 if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ap_handle, "_PXM", &pxm))) {
171 snprintf(buf2, 32, " _PXM=%d", pxm);
172 strlcat(buf, buf2, buflen);
179 * PCI power manangement
182 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
186 int old_state, error;
189 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
193 * We set the state using PCI Power Management outside of setting
194 * the ACPI state. This means that when powering down a device, we
195 * first shut it down using PCI, and then using ACPI, which lets ACPI
196 * try to power down any Power Resources that are now no longer used.
197 * When powering up a device, we let ACPI set the state first so that
198 * it can enable any needed Power Resources before changing the PCI
201 ACPI_SERIAL_BEGIN(pci_powerstate);
202 old_state = pci_get_powerstate(child);
203 if (old_state < state && pci_do_power_suspend) {
204 error = pci_set_powerstate_method(dev, child, state);
208 h = acpi_get_handle(child);
209 status = acpi_pwr_switch_consumer(h, state);
210 if (ACPI_SUCCESS(status)) {
212 device_printf(dev, "set ACPI power state D%d on %s\n",
213 state, acpi_name(h));
214 } else if (status != AE_NOT_FOUND)
216 "failed to set ACPI power state D%d on %s: %s\n",
217 state, acpi_name(h), AcpiFormatException(status));
218 if (old_state > state && pci_do_power_resume)
219 error = pci_set_powerstate_method(dev, child, state);
222 ACPI_SERIAL_END(pci_powerstate);
227 acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child)
233 * Occasionally a PCI device may show up as an ACPI device
234 * with a _HID. (For example, the TabletPC TC1000 has a
235 * second PCI-ISA bridge that has a _HID for an
236 * acpi_sysresource device.) In that case, leave ACPI-CA's
237 * device data pointing at the ACPI-enumerated device.
239 child = acpi_get_device(handle);
241 KASSERT(device_get_parent(child) ==
242 devclass_get_device(devclass_find("acpi"), 0),
243 ("%s: child (%s)'s parent is not acpi0", __func__,
249 * Update ACPI-CA to use the PCI enumerated device_t for this handle.
251 status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child);
252 if (ACPI_FAILURE(status))
253 printf("WARNING: Unable to attach object data to %s - %s\n",
254 acpi_name(handle), AcpiFormatException(status));
258 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
261 struct acpi_pci_devinfo *dinfo;
263 int devcount, i, func, slot;
266 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
268 if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
269 return_ACPI_STATUS (AE_OK);
270 slot = ACPI_ADR_PCI_SLOT(address);
271 func = ACPI_ADR_PCI_FUNC(address);
272 if (device_get_children((device_t)context, &devlist, &devcount) != 0)
273 return_ACPI_STATUS (AE_OK);
274 for (i = 0; i < devcount; i++) {
275 dinfo = device_get_ivars(devlist[i]);
276 if (dinfo->ap_dinfo.cfg.func == func &&
277 dinfo->ap_dinfo.cfg.slot == slot) {
278 dinfo->ap_handle = handle;
279 acpi_pci_update_device(handle, devlist[i]);
283 free(devlist, M_TEMP);
284 return_ACPI_STATUS (AE_OK);
288 acpi_pci_probe(device_t dev)
291 if (acpi_get_handle(dev) == NULL)
293 device_set_desc(dev, "ACPI PCI bus");
294 return (BUS_PROBE_DEFAULT);
298 acpi_pci_attach(device_t dev)
300 int busno, domain, error;
302 error = pci_attach_common(dev);
307 * Since there can be multiple independantly numbered PCI
308 * busses on systems with multiple PCI domains, we can't use
309 * the unit number to decide which bus we are probing. We ask
310 * the parent pcib what our domain and bus numbers are.
312 domain = pcib_get_domain(dev);
313 busno = pcib_get_bus(dev);
316 * First, PCI devices are added as in the normal PCI bus driver.
317 * Afterwards, the ACPI namespace under the bridge driver is
318 * walked to save ACPI handles to all the devices that appear in
319 * the ACPI namespace as immediate descendants of the bridge.
321 * XXX: Sometimes PCI devices show up in the ACPI namespace that
322 * pci_add_children() doesn't find. We currently just ignore
325 pci_add_children(dev, domain, busno, sizeof(struct acpi_pci_devinfo));
326 AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
327 acpi_pci_save_handle, NULL, dev, NULL);
329 return (bus_generic_attach(dev));
333 bus_dma_tag_t dmar_get_dma_tag(device_t dev, device_t child);
335 acpi_pci_get_dma_tag(device_t bus, device_t child)
339 if (device_get_parent(child) == bus) {
340 /* try dmar and return if it works */
341 tag = dmar_get_dma_tag(bus, child);
345 tag = pci_get_dma_tag(bus, child);
350 acpi_pci_get_dma_tag(device_t bus, device_t child)
353 return (pci_get_dma_tag(bus, child));
359 acpi_pci_create_iov_child(device_t bus, device_t pf, uint16_t rid, uint16_t vid,
362 struct acpi_pci_devinfo *dinfo;
365 vf = pci_add_iov_child(bus, pf, sizeof(struct acpi_pci_devinfo), rid,
370 dinfo = device_get_ivars(vf);
371 dinfo->ap_handle = NULL;