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("$FreeBSD$");
33 #include "opt_iommu.h"
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/malloc.h>
40 #include <sys/module.h>
42 #include <sys/taskqueue.h>
45 #include <contrib/dev/acpica/include/acpi.h>
46 #include <contrib/dev/acpica/include/accommon.h>
48 #include <dev/acpica/acpivar.h>
49 #include <dev/acpica/acpi_pcivar.h>
51 #include <sys/pciio.h>
52 #include <dev/pci/pcireg.h>
53 #include <dev/pci/pcivar.h>
54 #include <dev/pci/pci_private.h>
56 #include <dev/iommu/iommu.h>
61 /* Hooks for the ACPI CA debugging infrastructure. */
62 #define _COMPONENT ACPI_BUS
63 ACPI_MODULE_NAME("PCI")
65 struct acpi_pci_devinfo {
66 struct pci_devinfo ap_dinfo;
67 ACPI_HANDLE ap_handle;
71 ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods");
73 /* Be sure that ACPI and PCI power states are equivalent. */
74 CTASSERT(ACPI_STATE_D0 == PCI_POWERSTATE_D0);
75 CTASSERT(ACPI_STATE_D1 == PCI_POWERSTATE_D1);
76 CTASSERT(ACPI_STATE_D2 == PCI_POWERSTATE_D2);
77 CTASSERT(ACPI_STATE_D3 == PCI_POWERSTATE_D3);
79 static struct pci_devinfo *acpi_pci_alloc_devinfo(device_t dev);
80 static int acpi_pci_attach(device_t dev);
81 static void acpi_pci_child_deleted(device_t dev, device_t child);
82 static int acpi_pci_child_location_method(device_t cbdev,
83 device_t child, struct sbuf *sb);
84 static int acpi_pci_get_device_path(device_t cbdev,
85 device_t child, const char *locator, struct sbuf *sb);
86 static int acpi_pci_detach(device_t dev);
87 static int acpi_pci_probe(device_t dev);
88 static int acpi_pci_read_ivar(device_t dev, device_t child, int which,
90 static int acpi_pci_write_ivar(device_t dev, device_t child, int which,
92 static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
93 void *context, void **status);
94 static int acpi_pci_set_powerstate_method(device_t dev, device_t child,
96 static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child);
97 static bus_dma_tag_t acpi_pci_get_dma_tag(device_t bus, device_t child);
99 static device_method_t acpi_pci_methods[] = {
100 /* Device interface */
101 DEVMETHOD(device_probe, acpi_pci_probe),
102 DEVMETHOD(device_attach, acpi_pci_attach),
103 DEVMETHOD(device_detach, acpi_pci_detach),
106 DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar),
107 DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar),
108 DEVMETHOD(bus_child_deleted, acpi_pci_child_deleted),
109 DEVMETHOD(bus_child_location, acpi_pci_child_location_method),
110 DEVMETHOD(bus_get_device_path, acpi_pci_get_device_path),
111 DEVMETHOD(bus_get_cpus, acpi_get_cpus),
112 DEVMETHOD(bus_get_dma_tag, acpi_pci_get_dma_tag),
113 DEVMETHOD(bus_get_domain, acpi_get_domain),
116 DEVMETHOD(pci_alloc_devinfo, acpi_pci_alloc_devinfo),
117 DEVMETHOD(pci_child_added, acpi_pci_child_added),
118 DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method),
123 static devclass_t pci_devclass;
125 DEFINE_CLASS_1(pci, acpi_pci_driver, acpi_pci_methods, sizeof(struct pci_softc),
127 DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
128 MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
129 MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
130 MODULE_VERSION(acpi_pci, 1);
132 static struct pci_devinfo *
133 acpi_pci_alloc_devinfo(device_t dev)
135 struct acpi_pci_devinfo *dinfo;
137 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
138 return (&dinfo->ap_dinfo);
142 acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
144 struct acpi_pci_devinfo *dinfo;
146 dinfo = device_get_ivars(child);
148 case ACPI_IVAR_HANDLE:
149 *result = (uintptr_t)dinfo->ap_handle;
151 case ACPI_IVAR_FLAGS:
152 *result = (uintptr_t)dinfo->ap_flags;
155 return (pci_read_ivar(dev, child, which, result));
159 acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
161 struct acpi_pci_devinfo *dinfo;
163 dinfo = device_get_ivars(child);
165 case ACPI_IVAR_HANDLE:
166 dinfo->ap_handle = (ACPI_HANDLE)value;
168 case ACPI_IVAR_FLAGS:
169 dinfo->ap_flags = (int)value;
172 return (pci_write_ivar(dev, child, which, value));
176 acpi_pci_child_deleted(device_t dev, device_t child)
178 struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
180 if (acpi_get_device(dinfo->ap_handle) == child)
181 AcpiDetachData(dinfo->ap_handle, acpi_fake_objhandler);
182 pci_child_deleted(dev, child);
186 acpi_pci_child_location_method(device_t cbdev, device_t child, struct sbuf *sb)
188 struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
191 pci_child_location_method(cbdev, child, sb);
193 if (dinfo->ap_handle) {
194 sbuf_printf(sb, " handle=%s", acpi_name(dinfo->ap_handle));
195 if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ap_handle, "_PXM", &pxm))) {
196 sbuf_printf(sb, " _PXM=%d", pxm);
203 acpi_pci_get_device_path(device_t bus, device_t child, const char *locator, struct sbuf *sb)
206 if (strcmp(locator, BUS_LOCATOR_ACPI) == 0)
207 return (acpi_get_acpi_device_path(bus, child, locator, sb));
209 /* Otherwise follow base class' actions */
210 return (pci_get_device_path_method(bus, child, locator, sb));
214 * PCI power manangement
217 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
221 int old_state, error;
224 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
228 * We set the state using PCI Power Management outside of setting
229 * the ACPI state. This means that when powering down a device, we
230 * first shut it down using PCI, and then using ACPI, which lets ACPI
231 * try to power down any Power Resources that are now no longer used.
232 * When powering up a device, we let ACPI set the state first so that
233 * it can enable any needed Power Resources before changing the PCI
236 ACPI_SERIAL_BEGIN(pci_powerstate);
237 old_state = pci_get_powerstate(child);
238 if (old_state < state && pci_do_power_suspend) {
239 error = pci_set_powerstate_method(dev, child, state);
243 h = acpi_get_handle(child);
244 status = acpi_pwr_switch_consumer(h, state);
245 if (ACPI_SUCCESS(status)) {
247 device_printf(dev, "set ACPI power state D%d on %s\n",
248 state, acpi_name(h));
249 } else if (status != AE_NOT_FOUND)
251 "failed to set ACPI power state D%d on %s: %s\n",
252 state, acpi_name(h), AcpiFormatException(status));
253 if (old_state > state && pci_do_power_resume)
254 error = pci_set_powerstate_method(dev, child, state);
257 ACPI_SERIAL_END(pci_powerstate);
262 acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child)
268 * Occasionally a PCI device may show up as an ACPI device
269 * with a _HID. (For example, the TabletPC TC1000 has a
270 * second PCI-ISA bridge that has a _HID for an
271 * acpi_sysresource device.) In that case, leave ACPI-CA's
272 * device data pointing at the ACPI-enumerated device.
274 child = acpi_get_device(handle);
276 KASSERT(device_get_parent(child) ==
277 devclass_get_device(devclass_find("acpi"), 0),
278 ("%s: child (%s)'s parent is not acpi0", __func__,
284 * Update ACPI-CA to use the PCI enumerated device_t for this handle.
286 status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child);
287 if (ACPI_FAILURE(status))
288 printf("WARNING: Unable to attach object data to %s - %s\n",
289 acpi_name(handle), AcpiFormatException(status));
293 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
296 struct acpi_pci_devinfo *dinfo;
301 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
304 if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
305 return_ACPI_STATUS (AE_OK);
306 slot = ACPI_ADR_PCI_SLOT(address);
307 func = ACPI_ADR_PCI_FUNC(address);
308 dinfo = device_get_ivars(child);
309 if (dinfo->ap_dinfo.cfg.func == func &&
310 dinfo->ap_dinfo.cfg.slot == slot) {
311 dinfo->ap_handle = handle;
312 acpi_pci_update_device(handle, child);
313 return_ACPI_STATUS (AE_CTRL_TERMINATE);
315 return_ACPI_STATUS (AE_OK);
319 acpi_pci_child_added(device_t dev, device_t child)
323 * PCI devices are added via the bus scan in the normal PCI
324 * bus driver. As each device is added, the
325 * acpi_pci_child_added() callback walks the ACPI namespace
326 * under the bridge driver to save ACPI handles to all the
327 * devices that appear in the ACPI namespace as immediate
328 * descendants of the bridge.
330 * XXX: Sometimes PCI devices show up in the ACPI namespace that
331 * pci_add_children() doesn't find. We currently just ignore
334 AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
335 acpi_pci_save_handle, NULL, child, NULL);
339 acpi_pci_probe(device_t dev)
342 if (acpi_get_handle(dev) == NULL)
344 device_set_desc(dev, "ACPI PCI bus");
345 return (BUS_PROBE_DEFAULT);
349 acpi_pci_bus_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
356 case ACPI_NOTIFY_BUS_CHECK:
362 device_printf(dev, "unknown notify %#x\n", notify);
368 acpi_pci_device_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
377 case ACPI_NOTIFY_DEVICE_CHECK:
382 case ACPI_NOTIFY_EJECT_REQUEST:
383 child = acpi_get_device(h);
385 device_printf(dev, "no device to eject for %s\n",
390 error = device_detach(child);
393 device_printf(dev, "failed to detach %s: %d\n",
394 device_get_nameunit(child), error);
397 status = acpi_SetInteger(h, "_EJ0", 1);
398 if (ACPI_FAILURE(status)) {
400 device_printf(dev, "failed to eject %s: %s\n",
401 acpi_name(h), AcpiFormatException(status));
408 device_printf(dev, "unknown notify %#x for %s\n", notify,
415 acpi_pci_install_device_notify_handler(ACPI_HANDLE handle, UINT32 level,
416 void *context, void **status)
420 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
422 if (ACPI_FAILURE(AcpiGetHandle(handle, "_EJ0", &h)))
423 return_ACPI_STATUS (AE_OK);
425 AcpiInstallNotifyHandler(handle, ACPI_SYSTEM_NOTIFY,
426 acpi_pci_device_notify_handler, context);
427 return_ACPI_STATUS (AE_OK);
431 acpi_pci_attach(device_t dev)
435 error = pci_attach(dev);
438 AcpiInstallNotifyHandler(acpi_get_handle(dev), ACPI_SYSTEM_NOTIFY,
439 acpi_pci_bus_notify_handler, dev);
440 AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
441 acpi_pci_install_device_notify_handler, NULL, dev, NULL);
447 acpi_pci_remove_notify_handler(ACPI_HANDLE handle, UINT32 level, void *context,
452 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
454 if (ACPI_FAILURE(AcpiGetHandle(handle, "_EJ0", &h)))
455 return_ACPI_STATUS (AE_OK);
457 AcpiRemoveNotifyHandler(handle, ACPI_SYSTEM_NOTIFY,
458 acpi_pci_device_notify_handler);
459 return_ACPI_STATUS (AE_OK);
463 acpi_pci_detach(device_t dev)
466 AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
467 acpi_pci_remove_notify_handler, NULL, dev, NULL);
468 AcpiRemoveNotifyHandler(acpi_get_handle(dev), ACPI_SYSTEM_NOTIFY,
469 acpi_pci_bus_notify_handler);
470 return (pci_detach(dev));
475 acpi_pci_get_dma_tag(device_t bus, device_t child)
479 if (device_get_parent(child) == bus) {
480 /* try iommu and return if it works */
481 tag = iommu_get_dma_tag(bus, child);
485 tag = pci_get_dma_tag(bus, child);
490 acpi_pci_get_dma_tag(device_t bus, device_t child)
493 return (pci_get_dma_tag(bus, child));