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-rw-r--r--sys/dev/acpi_support/acpi_wmi.c1006
1 files changed, 1006 insertions, 0 deletions
diff --git a/sys/dev/acpi_support/acpi_wmi.c b/sys/dev/acpi_support/acpi_wmi.c
new file mode 100644
index 000000000000..3f4b511f1d3e
--- /dev/null
+++ b/sys/dev/acpi_support/acpi_wmi.c
@@ -0,0 +1,1006 @@
+/*-
+ * Copyright (c) 2009 Michael Gmelin <freebsd@grem.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Driver for acpi-wmi mapping, provides an interface for vendor specific
+ * implementations (e.g. HP and Acer laptops).
+ * Inspired by the ACPI-WMI mapping driver (c) 2008-2008 Carlos Corbacho which
+ * implements this functionality for Linux.
+ *
+ * WMI and ACPI: http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx
+ * acpi-wmi for Linux: http://www.kernel.org
+ */
+
+#include "opt_acpi.h"
+#include <sys/param.h>
+#include <sys/conf.h>
+#include <sys/uio.h>
+#include <sys/proc.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/sbuf.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+
+#include <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/accommon.h>
+#include <dev/acpica/acpivar.h>
+#include "acpi_wmi_if.h"
+
+MALLOC_DEFINE(M_ACPIWMI, "acpiwmi", "ACPI-WMI mapping");
+
+#define _COMPONENT ACPI_OEM
+ACPI_MODULE_NAME("ACPI_WMI");
+
+#define ACPI_WMI_REGFLAG_EXPENSIVE 0x1 /* GUID flag: Expensive operation */
+#define ACPI_WMI_REGFLAG_METHOD 0x2 /* GUID flag: Method call */
+#define ACPI_WMI_REGFLAG_STRING 0x4 /* GUID flag: String */
+#define ACPI_WMI_REGFLAG_EVENT 0x8 /* GUID flag: Event */
+
+/*
+ * acpi_wmi driver private structure
+ */
+struct acpi_wmi_softc {
+ device_t wmi_dev; /* wmi device id */
+ ACPI_HANDLE wmi_handle; /* handle of the PNP0C14 node */
+ device_t ec_dev; /* acpi_ec0 */
+ struct cdev *wmistat_dev_t; /* wmistat device handle */
+ struct sbuf wmistat_sbuf; /* sbuf for /dev/wmistat output */
+ pid_t wmistat_open_pid; /* pid operating on /dev/wmistat */
+ int wmistat_bufptr; /* /dev/wmistat ptr to buffer position */
+};
+
+/*
+ * Struct that holds information about
+ * about a single GUID entry in _WDG
+ */
+struct guid_info {
+ char guid[16]; /* 16 byte non human readable GUID */
+ char oid[2]; /* object id or event notify id (first byte) */
+ UINT8 max_instance; /* highest instance known for this GUID */
+ UINT8 flags; /* ACPI_WMI_REGFLAG_%s */
+};
+
+/* WExx event generation state (on/off) */
+enum event_generation_state {
+ EVENT_GENERATION_ON = 1,
+ EVENT_GENERATION_OFF = 0
+};
+
+
+/*
+ * Information about one entry in _WDG.
+ * List of those is used to lookup information by GUID.
+ */
+struct wmi_info {
+ TAILQ_ENTRY(wmi_info) wmi_list;
+ struct guid_info ginfo; /* information on guid */
+ ACPI_NOTIFY_HANDLER event_handler;/* client provided event handler */
+ void *event_handler_user_data; /* ev handler cookie */
+};
+
+TAILQ_HEAD(wmi_info_list_head, wmi_info)
+ wmi_info_list = TAILQ_HEAD_INITIALIZER(wmi_info_list);
+
+ACPI_SERIAL_DECL(acpi_wmi, "ACPI-WMI Mapping");
+
+/* public interface - declaration */
+/* standard device interface*/
+static int acpi_wmi_probe(device_t dev);
+static int acpi_wmi_attach(device_t dev);
+static int acpi_wmi_detach(device_t dev);
+/* see acpi_wmi_if.m */
+static int acpi_wmi_provides_guid_string_method(device_t dev,
+ const char *guid_string);
+static ACPI_STATUS acpi_wmi_evaluate_call_method(device_t dev,
+ const char *guid_string, UINT8 instance,
+ UINT32 method_id, const ACPI_BUFFER *in,
+ ACPI_BUFFER *out);
+static ACPI_STATUS acpi_wmi_install_event_handler_method(device_t dev,
+ const char *guid_string, ACPI_NOTIFY_HANDLER handler,
+ void *data);
+static ACPI_STATUS acpi_wmi_remove_event_handler_method(device_t dev,
+ const char *guid_string);
+static ACPI_STATUS acpi_wmi_get_event_data_method(device_t dev,
+ UINT32 event_id, ACPI_BUFFER *out);
+static ACPI_STATUS acpi_wmi_get_block_method(device_t dev,
+ const char *guid_string,
+ UINT8 instance, ACPI_BUFFER *out);
+static ACPI_STATUS acpi_wmi_set_block_method(device_t dev,
+ const char *guid_string,
+ UINT8 instance, const ACPI_BUFFER *in);
+/* private interface - declaration */
+/* callbacks */
+static void acpi_wmi_notify_handler(ACPI_HANDLE h, UINT32 notify,
+ void *context);
+static ACPI_STATUS acpi_wmi_ec_handler(UINT32 function,
+ ACPI_PHYSICAL_ADDRESS address, UINT32 width,
+ ACPI_INTEGER *value, void *context,
+ void *region_context);
+/* helpers */
+static ACPI_STATUS acpi_wmi_read_wdg_blocks(ACPI_HANDLE h);
+static ACPI_STATUS acpi_wmi_toggle_we_event_generation(device_t dev,
+ struct wmi_info *winfo,
+ enum event_generation_state state);
+static int acpi_wmi_guid_string_to_guid(const UINT8 *guid_string,
+ UINT8 *guid);
+static struct wmi_info* acpi_wmi_lookup_wmi_info_by_guid_string(
+ const char *guid_string);
+
+static d_open_t acpi_wmi_wmistat_open;
+static d_close_t acpi_wmi_wmistat_close;
+static d_read_t acpi_wmi_wmistat_read;
+
+/* handler /dev/wmistat device */
+static struct cdevsw wmistat_cdevsw = {
+ .d_version = D_VERSION,
+ .d_open = acpi_wmi_wmistat_open,
+ .d_close = acpi_wmi_wmistat_close,
+ .d_read = acpi_wmi_wmistat_read,
+ .d_name = "wmistat",
+};
+
+
+static device_method_t acpi_wmi_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, acpi_wmi_probe),
+ DEVMETHOD(device_attach, acpi_wmi_attach),
+ DEVMETHOD(device_detach, acpi_wmi_detach),
+
+ /* acpi_wmi interface */
+ DEVMETHOD(acpi_wmi_provides_guid_string,
+ acpi_wmi_provides_guid_string_method),
+ DEVMETHOD(acpi_wmi_evaluate_call, acpi_wmi_evaluate_call_method),
+ DEVMETHOD(acpi_wmi_install_event_handler,
+ acpi_wmi_install_event_handler_method),
+ DEVMETHOD(acpi_wmi_remove_event_handler,
+ acpi_wmi_remove_event_handler_method),
+ DEVMETHOD(acpi_wmi_get_event_data, acpi_wmi_get_event_data_method),
+ DEVMETHOD(acpi_wmi_get_block, acpi_wmi_get_block_method),
+ DEVMETHOD(acpi_wmi_set_block, acpi_wmi_set_block_method),
+
+ {0, 0}
+};
+
+static driver_t acpi_wmi_driver = {
+ "acpi_wmi",
+ acpi_wmi_methods,
+ sizeof(struct acpi_wmi_softc),
+};
+
+static devclass_t acpi_wmi_devclass;
+DRIVER_MODULE(acpi_wmi, acpi, acpi_wmi_driver, acpi_wmi_devclass, 0, 0);
+MODULE_VERSION(acpi_wmi, 1);
+MODULE_DEPEND(acpi_wmi, acpi, 1, 1, 1);
+static char *wmi_ids[] = {"PNP0C14", "PNP0c14", NULL};
+
+/*
+ * Probe for the PNP0C14 ACPI node
+ */
+static int
+acpi_wmi_probe(device_t dev)
+{
+ if (acpi_disabled("wmi") ||
+ ACPI_ID_PROBE(device_get_parent(dev), dev, wmi_ids) == NULL)
+ return (ENXIO);
+ device_set_desc(dev, "ACPI-WMI mapping");
+
+ return (0);
+}
+
+/*
+ * Attach the device by:
+ * - Looking for the first ACPI EC device
+ * - Install the notify handler
+ * - Install the EC address space handler
+ * - Look for the _WDG node and read GUID information blocks
+ */
+static int
+acpi_wmi_attach(device_t dev)
+{
+ struct acpi_wmi_softc *sc;
+ int ret;
+ ACPI_STATUS status;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+ sc = device_get_softc(dev);
+ ret = ENXIO;
+
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ sc->wmi_dev = dev;
+ sc->wmi_handle = acpi_get_handle(dev);
+ TAILQ_INIT(&wmi_info_list);
+ /* XXX Only works with one EC, but nearly all systems only have one. */
+ if ((sc->ec_dev = devclass_get_device(devclass_find("acpi_ec"), 0))
+ == NULL)
+ device_printf(dev, "cannot find EC device\n");
+ else if (ACPI_FAILURE((status = AcpiInstallNotifyHandler(sc->wmi_handle,
+ ACPI_DEVICE_NOTIFY, acpi_wmi_notify_handler, sc))))
+ device_printf(sc->wmi_dev, "couldn't install notify handler - %s\n",
+ AcpiFormatException(status));
+ else if (ACPI_FAILURE((status = AcpiInstallAddressSpaceHandler(
+ sc->wmi_handle, ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler,
+ NULL, sc)))) {
+ device_printf(sc->wmi_dev, "couldn't install EC handler - %s\n",
+ AcpiFormatException(status));
+ AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
+ acpi_wmi_notify_handler);
+ } else if (ACPI_FAILURE((status = acpi_wmi_read_wdg_blocks(
+ sc->wmi_handle)))) {
+ device_printf(sc->wmi_dev, "couldn't parse _WDG - %s\n",
+ AcpiFormatException(status));
+ AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
+ acpi_wmi_notify_handler);
+ AcpiRemoveAddressSpaceHandler(sc->wmi_handle, ACPI_ADR_SPACE_EC,
+ acpi_wmi_ec_handler);
+ } else {
+ sc->wmistat_dev_t = make_dev(&wmistat_cdevsw, 0, UID_ROOT,
+ GID_WHEEL, 0644, "wmistat");
+ sc->wmistat_dev_t->si_drv1 = sc;
+ sc->wmistat_open_pid = 0;
+ sc->wmistat_bufptr = -1;
+ ret = 0;
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (ret);
+}
+
+/*
+ * Detach the driver by:
+ * - Removing notification handler
+ * - Removing address space handler
+ * - Turning off event generation for all WExx event activated by
+ * child drivers
+ */
+static int
+acpi_wmi_detach(device_t dev)
+{
+ struct wmi_info *winfo, *tmp;
+ struct acpi_wmi_softc *sc;
+ int ret;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+ sc = device_get_softc(dev);
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+
+ if (sc->wmistat_open_pid != 0) {
+ ret = EBUSY;
+ } else {
+ AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
+ acpi_wmi_notify_handler);
+ AcpiRemoveAddressSpaceHandler(sc->wmi_handle,
+ ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler);
+ TAILQ_FOREACH_SAFE(winfo, &wmi_info_list, wmi_list, tmp) {
+ if (winfo->event_handler)
+ acpi_wmi_toggle_we_event_generation(dev,
+ winfo, EVENT_GENERATION_OFF);
+ TAILQ_REMOVE(&wmi_info_list, winfo, wmi_list);
+ free(winfo, M_ACPIWMI);
+ }
+ if (sc->wmistat_bufptr != -1) {
+ sbuf_delete(&sc->wmistat_sbuf);
+ sc->wmistat_bufptr = -1;
+ }
+ sc->wmistat_open_pid = 0;
+ destroy_dev(sc->wmistat_dev_t);
+ ret = 0;
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (ret);
+}
+
+
+/*
+ * Check if the given GUID string (human readable format
+ * AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP)
+ * exists within _WDG
+ */
+static int
+acpi_wmi_provides_guid_string_method(device_t dev, const char *guid_string)
+{
+ int ret;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ ret = (acpi_wmi_lookup_wmi_info_by_guid_string(guid_string) == NULL)?0:1;
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (ret);
+}
+
+/*
+ * Call a method "method_id" on the given GUID block
+ * write result into user provided output buffer
+ */
+static ACPI_STATUS
+acpi_wmi_evaluate_call_method(device_t dev, const char *guid_string,
+ UINT8 instance, UINT32 method_id, const ACPI_BUFFER *in, ACPI_BUFFER *out)
+{
+ ACPI_OBJECT params[3];
+ ACPI_OBJECT_LIST input;
+ char method[5] = "WMxx";
+ struct wmi_info *winfo;
+ struct acpi_wmi_softc *sc;
+ ACPI_STATUS status;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+ sc = device_get_softc(dev);
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string))
+ == NULL)
+ status = AE_NOT_FOUND;
+ else if (!(winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD))
+ status = AE_BAD_DATA;
+ else if (instance > winfo->ginfo.max_instance)
+ status = AE_BAD_PARAMETER;
+ else {
+ params[0].Type = ACPI_TYPE_INTEGER;
+ params[0].Integer.Value = instance;
+ params[1].Type = ACPI_TYPE_INTEGER;
+ params[1].Integer.Value = method_id;
+ input.Pointer = params;
+ input.Count = 2;
+ if (in) {
+ params[2].Type =
+ (winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING)
+ ?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER;
+ params[2].Buffer.Length = in->Length;
+ params[2].Buffer.Pointer = in->Pointer;
+ input.Count = 3;
+ }
+ method[2] = winfo->ginfo.oid[0];
+ method[3] = winfo->ginfo.oid[1];
+ status = AcpiEvaluateObject(sc->wmi_handle, method,
+ &input, out);
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (status);
+}
+
+/*
+ * Install a user provided event_handler on the given GUID
+ * provided *data will be passed on callback
+ * If there is already an existing event handler registered it will be silently
+ * discarded
+ */
+static ACPI_STATUS
+acpi_wmi_install_event_handler_method(device_t dev, const char *guid_string,
+ ACPI_NOTIFY_HANDLER event_handler, void *data)
+{
+ struct wmi_info *winfo;
+ ACPI_STATUS status;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+ status = AE_OK;
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ if (guid_string == NULL || event_handler == NULL)
+ status = AE_BAD_PARAMETER;
+ else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string))
+ == NULL)
+ status = AE_NOT_EXIST;
+ else if (winfo->event_handler != NULL ||
+ (status = acpi_wmi_toggle_we_event_generation(dev, winfo,
+ EVENT_GENERATION_ON)) == AE_OK) {
+ winfo->event_handler = event_handler;
+ winfo->event_handler_user_data = data;
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (status);
+}
+
+/*
+ * Remove a previously installed event handler from the given GUID
+ * If there was none installed, this call is silently discarded and
+ * reported as AE_OK
+ */
+static ACPI_STATUS
+acpi_wmi_remove_event_handler_method(device_t dev, const char *guid_string)
+{
+ struct wmi_info *winfo;
+ ACPI_STATUS status;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+ status = AE_OK;
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ if (guid_string &&
+ (winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string))
+ != NULL && winfo->event_handler) {
+ status = acpi_wmi_toggle_we_event_generation(dev, winfo,
+ EVENT_GENERATION_OFF);
+ winfo->event_handler = NULL;
+ winfo->event_handler_user_data = NULL;
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (status);
+}
+
+/*
+ * Get details on an event received through a callback registered
+ * through ACPI_WMI_REMOVE_EVENT_HANDLER into a user provided output buffer.
+ * (event_id equals "notify" passed in the callback)
+ */
+static ACPI_STATUS
+acpi_wmi_get_event_data_method(device_t dev, UINT32 event_id, ACPI_BUFFER *out)
+{
+ ACPI_OBJECT_LIST input;
+ ACPI_OBJECT params[1];
+ struct acpi_wmi_softc *sc;
+ struct wmi_info *winfo;
+ ACPI_STATUS status;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+ sc = device_get_softc(dev);
+ status = AE_NOT_FOUND;
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ params[0].Type = ACPI_TYPE_INTEGER;
+ params[0].Integer.Value = event_id;
+ input.Pointer = params;
+ input.Count = 1;
+ TAILQ_FOREACH(winfo, &wmi_info_list, wmi_list) {
+ if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) &&
+ ((UINT8) winfo->ginfo.oid[0] == event_id)) {
+ status = AcpiEvaluateObject(sc->wmi_handle, "_WED",
+ &input, out);
+ break;
+ }
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (status);
+}
+
+/*
+ * Read a block of data from the given GUID (using WQxx (query))
+ * Will be returned in a user provided buffer (out).
+ * If the method is marked as expensive (ACPI_WMI_REGFLAG_EXPENSIVE)
+ * we will first call the WCxx control method to lock the node to
+ * lock the node for data collection and release it afterwards.
+ * (Failed WCxx calls are ignored to "support" broken implementations)
+ */
+static ACPI_STATUS
+acpi_wmi_get_block_method(device_t dev, const char *guid_string, UINT8 instance,
+ ACPI_BUFFER *out)
+{
+ char wc_method[5] = "WCxx";
+ char wq_method[5] = "WQxx";
+ ACPI_OBJECT_LIST wc_input;
+ ACPI_OBJECT_LIST wq_input;
+ ACPI_OBJECT wc_params[1];
+ ACPI_OBJECT wq_params[1];
+ ACPI_HANDLE wc_handle;
+ struct acpi_wmi_softc *sc;
+ struct wmi_info *winfo;
+ ACPI_STATUS status;
+ ACPI_STATUS wc_status;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+ sc = device_get_softc(dev);
+ wc_status = AE_ERROR;
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ if (guid_string == NULL || out == NULL)
+ status = AE_BAD_PARAMETER;
+ else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string))
+ == NULL)
+ status = AE_ERROR;
+ else if (instance > winfo->ginfo.max_instance)
+ status = AE_BAD_PARAMETER;
+ else if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) ||
+ (winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD))
+ status = AE_ERROR;
+ else {
+ wq_params[0].Type = ACPI_TYPE_INTEGER;
+ wq_params[0].Integer.Value = instance;
+ wq_input.Pointer = wq_params;
+ wq_input.Count = 1;
+ if (winfo->ginfo.flags & ACPI_WMI_REGFLAG_EXPENSIVE) {
+ wc_params[0].Type = ACPI_TYPE_INTEGER;
+ wc_params[0].Integer.Value = 1;
+ wc_input.Pointer = wc_params;
+ wc_input.Count = 1;
+ wc_method[2] = winfo->ginfo.oid[0];
+ wc_method[3] = winfo->ginfo.oid[1];
+ wc_status = AcpiGetHandle(sc->wmi_handle, wc_method,
+ &wc_handle);
+ if (ACPI_SUCCESS(wc_status))
+ wc_status = AcpiEvaluateObject(wc_handle,
+ wc_method, &wc_input, NULL);
+ }
+ wq_method[2] = winfo->ginfo.oid[0];
+ wq_method[3] = winfo->ginfo.oid[1];
+ status = AcpiEvaluateObject(sc->wmi_handle, wq_method,
+ &wq_input, out);
+ if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EXPENSIVE)
+ && ACPI_SUCCESS(wc_status)) {
+ wc_params[0].Integer.Value = 0;
+ status = AcpiEvaluateObject(wc_handle, wc_method,
+ &wc_input, NULL); /* XXX this might be
+ the wrong status to
+ return? */
+ }
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (status);
+}
+
+/*
+ * Write a block of data to the given GUID (using WSxx)
+ */
+static ACPI_STATUS
+acpi_wmi_set_block_method(device_t dev, const char *guid_string, UINT8 instance,
+ const ACPI_BUFFER *in)
+{
+ char method[5] = "WSxx";
+ ACPI_OBJECT_LIST input;
+ ACPI_OBJECT params[2];
+ struct wmi_info *winfo;
+ struct acpi_wmi_softc *sc;
+ ACPI_STATUS status;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+ sc = device_get_softc(dev);
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ if (guid_string == NULL || in == NULL)
+ status = AE_BAD_DATA;
+ else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string))
+ == NULL)
+ status = AE_ERROR;
+ else if (instance > winfo->ginfo.max_instance)
+ status = AE_BAD_PARAMETER;
+ else if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) ||
+ (winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD))
+ status = AE_ERROR;
+ else {
+ params[0].Type = ACPI_TYPE_INTEGER;
+ params[0].Integer.Value = instance;
+ input.Pointer = params;
+ input.Count = 2;
+ params[1].Type = (winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING)
+ ?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER;
+ params[1].Buffer.Length = in->Length;
+ params[1].Buffer.Pointer = in->Pointer;
+ method[2] = winfo->ginfo.oid[0];
+ method[3] = winfo->ginfo.oid[1];
+ status = AcpiEvaluateObject(sc->wmi_handle, method,
+ &input, NULL);
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (status);
+}
+
+/*
+ * Handle events received and dispatch them to
+ * stakeholders that registered through ACPI_WMI_INSTALL_EVENT_HANDLER
+ */
+static void
+acpi_wmi_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
+{
+ ACPI_NOTIFY_HANDLER handler;
+ void *handler_data;
+ struct wmi_info *winfo;
+
+ ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
+
+ handler = NULL;
+ handler_data = NULL;
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ TAILQ_FOREACH(winfo, &wmi_info_list, wmi_list) {
+ if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) &&
+ ((UINT8) winfo->ginfo.oid[0] == notify)) {
+ if (winfo->event_handler) {
+ handler = winfo->event_handler;
+ handler_data = winfo->event_handler_user_data;
+ break;
+ }
+ }
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+ if (handler) {
+ handler(h, notify, handler_data);
+ }
+}
+
+/*
+ * Handle EC address space notifications reveived on the WDG node
+ * (this mimics EcAddressSpaceHandler in acpi_ec.c)
+ */
+static ACPI_STATUS
+acpi_wmi_ec_handler(UINT32 function, ACPI_PHYSICAL_ADDRESS address,
+ UINT32 width, ACPI_INTEGER *value, void *context,
+ void *region_context)
+{
+ struct acpi_wmi_softc *sc;
+ int i;
+ ACPI_INTEGER ec_data;
+ UINT8 ec_addr;
+ ACPI_STATUS status;
+
+ ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)Address);
+
+ sc = (struct acpi_wmi_softc *)context;
+ if (width % 8 != 0 || value == NULL || context == NULL)
+ return (AE_BAD_PARAMETER);
+ if (address + (width / 8) - 1 > 0xFF)
+ return (AE_BAD_ADDRESS);
+ if (function == ACPI_READ)
+ *value = 0;
+ ec_addr = address;
+ status = AE_ERROR;
+
+ for (i = 0; i < width; i += 8, ++ec_addr) {
+ switch (function) {
+ case ACPI_READ:
+ status = ACPI_EC_READ(sc->ec_dev, ec_addr, &ec_data, 1);
+ if (ACPI_SUCCESS(status))
+ *value |= ((ACPI_INTEGER)ec_data) << i;
+ break;
+ case ACPI_WRITE:
+ ec_data = (UINT8)((*value) >> i);
+ status = ACPI_EC_WRITE(sc->ec_dev, ec_addr, ec_data, 1);
+ break;
+ default:
+ device_printf(sc->wmi_dev,
+ "invalid acpi_wmi_ec_handler function %d\n",
+ function);
+ status = AE_BAD_PARAMETER;
+ break;
+ }
+ if (ACPI_FAILURE(status))
+ break;
+ }
+
+ return (status);
+}
+
+/*
+ * Read GUID blocks from the _WDG node
+ * into wmi_info_list.
+ */
+static ACPI_STATUS
+acpi_wmi_read_wdg_blocks(ACPI_HANDLE h)
+{
+ ACPI_BUFFER out = {ACPI_ALLOCATE_BUFFER, NULL};
+ struct guid_info *ginfo;
+ ACPI_OBJECT *obj;
+ struct wmi_info *winfo;
+ UINT32 i;
+ UINT32 wdg_block_count;
+ ACPI_STATUS status;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+ ACPI_SERIAL_ASSERT(acpi_wmi);
+ if (ACPI_FAILURE(status = AcpiEvaluateObject(h, "_WDG", NULL, &out)))
+ return (status);
+ obj = (ACPI_OBJECT*) out.Pointer;
+ wdg_block_count = obj->Buffer.Length / sizeof(struct guid_info);
+ if ((ginfo = malloc(obj->Buffer.Length, M_ACPIWMI, M_NOWAIT))
+ == NULL) {
+ AcpiOsFree(out.Pointer);
+ return (AE_NO_MEMORY);
+ }
+ memcpy(ginfo, obj->Buffer.Pointer, obj->Buffer.Length);
+ for (i = 0; i < wdg_block_count; ++i) {
+ if ((winfo = malloc(sizeof(struct wmi_info), M_ACPIWMI,
+ M_NOWAIT | M_ZERO)) == NULL) {
+ AcpiOsFree(out.Pointer);
+ free(ginfo, M_ACPIWMI);
+ return (AE_NO_MEMORY);
+ }
+ winfo->ginfo = ginfo[i];
+ TAILQ_INSERT_TAIL(&wmi_info_list, winfo, wmi_list);
+ }
+ AcpiOsFree(out.Pointer);
+ free(ginfo, M_ACPIWMI);
+
+ return (status);
+}
+
+/*
+ * Toggle event generation in for the given GUID (passed by winfo)
+ * Turn on to get notified (through acpi_wmi_notify_handler) if events happen
+ * on the given GUID.
+ */
+static ACPI_STATUS
+acpi_wmi_toggle_we_event_generation(device_t dev, struct wmi_info *winfo,
+ enum event_generation_state state)
+{
+ char method[5] = "WExx";
+ ACPI_OBJECT_LIST input;
+ ACPI_OBJECT params[1];
+ struct acpi_wmi_softc *sc;
+ ACPI_STATUS status;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+ sc = device_get_softc(dev);
+ ACPI_SERIAL_ASSERT(acpi_wmi);
+ params[0].Type = ACPI_TYPE_INTEGER;
+ params[0].Integer.Value = state==EVENT_GENERATION_ON?1:0;
+ input.Pointer = params;
+ input.Count = 1;
+
+ UINT8 hi = ((UINT8) winfo->ginfo.oid[0]) >> 4;
+ UINT8 lo = ((UINT8) winfo->ginfo.oid[0]) & 0xf;
+ method[2] = (hi > 9 ? hi + 55: hi + 48);
+ method[3] = (lo > 9 ? lo + 55: lo + 48);
+ status = AcpiEvaluateObject(sc->wmi_handle, method, &input, NULL);
+ if (status == AE_NOT_FOUND) status = AE_OK;
+
+ return (status);
+}
+
+/*
+ * Convert given two digit hex string (hexin) to an UINT8 referenced
+ * by byteout.
+ * Return != 0 if the was a problem (invalid input)
+ */
+static __inline int acpi_wmi_hex_to_int(const UINT8 *hexin, UINT8 *byteout)
+{
+ unsigned int hi;
+ unsigned int lo;
+
+ hi = hexin[0];
+ lo = hexin[1];
+ if ('0' <= hi && hi <= '9')
+ hi -= '0';
+ else if ('A' <= hi && hi <= 'F')
+ hi -= ('A' - 10);
+ else if ('a' <= hi && hi <= 'f')
+ hi -= ('a' - 10);
+ else
+ return (1);
+ if ('0' <= lo && lo <= '9')
+ lo -= '0';
+ else if ('A' <= lo && lo <= 'F')
+ lo -= ('A' - 10);
+ else if ('a' <= lo && lo <= 'f')
+ lo -= ('a' - 10);
+ else
+ return (1);
+ *byteout = (hi << 4) + lo;
+
+ return (0);
+}
+
+/*
+ * Convert a human readable 36 character GUID into a 16byte
+ * machine readable one.
+ * The basic algorithm looks as follows:
+ * Input: AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP
+ * Output: DCBAFEHGIJKLMNOP
+ * (AA BB CC etc. represent two digit hex numbers == bytes)
+ * Return != 0 if passed guid string is invalid
+ */
+static int
+acpi_wmi_guid_string_to_guid(const UINT8 *guid_string, UINT8 *guid)
+{
+ static const int mapping[20] = {3, 2, 1, 0, -1, 5, 4, -1, 7, 6, -1,
+ 8, 9, -1, 10, 11, 12, 13, 14, 15};
+ int i;
+
+ for (i = 0; i < 20; ++i, ++guid_string) {
+ if (mapping[i] >= 0) {
+ if (acpi_wmi_hex_to_int(guid_string,
+ &guid[mapping[i]]))
+ return (-1);
+ ++guid_string;
+ } else if (*guid_string != '-')
+ return (-1);
+ }
+
+ return (0);
+}
+
+/*
+ * Lookup a wmi_info structure in wmi_list based on a
+ * human readable GUID
+ * Return NULL if the GUID is unknown in the _WDG
+ */
+static struct wmi_info*
+acpi_wmi_lookup_wmi_info_by_guid_string(const char *guid_string)
+{
+ char guid[16];
+ struct wmi_info *winfo;
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+ ACPI_SERIAL_ASSERT(acpi_wmi);
+
+ if (!acpi_wmi_guid_string_to_guid(guid_string, guid)) {
+ TAILQ_FOREACH(winfo, &wmi_info_list, wmi_list) {
+ if (!memcmp(winfo->ginfo.guid, guid, 16)) {
+ return (winfo);
+ }
+ }
+ }
+
+ return (NULL);
+}
+
+/*
+ * open wmistat device
+ */
+static int
+acpi_wmi_wmistat_open(struct cdev* dev, int flags, int mode, struct thread *td)
+{
+ struct acpi_wmi_softc *sc;
+ int ret;
+
+ if (dev == NULL || dev->si_drv1 == NULL)
+ return (EBADF);
+ sc = dev->si_drv1;
+
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ if (sc->wmistat_open_pid != 0) {
+ ret = EBUSY;
+ }
+ else {
+ if (sbuf_new(&sc->wmistat_sbuf, NULL, 4096, SBUF_AUTOEXTEND)
+ == NULL) {
+ ret = ENXIO;
+ } else {
+ sc->wmistat_open_pid = td->td_proc->p_pid;
+ sc->wmistat_bufptr = 0;
+ ret = 0;
+ }
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (ret);
+}
+
+/*
+ * close wmistat device
+ */
+static int
+acpi_wmi_wmistat_close(struct cdev* dev, int flags, int mode,
+ struct thread *td)
+{
+ struct acpi_wmi_softc *sc;
+ int ret;
+
+ if (dev == NULL || dev->si_drv1 == NULL)
+ return (EBADF);
+ sc = dev->si_drv1;
+
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ if (sc->wmistat_open_pid == 0) {
+ ret = EBADF;
+ }
+ else {
+ if (sc->wmistat_bufptr != -1) {
+ sbuf_delete(&sc->wmistat_sbuf);
+ sc->wmistat_bufptr = -1;
+ }
+ sc->wmistat_open_pid = 0;
+ ret = 0;
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (ret);
+}
+
+/*
+ * Read from wmistat guid information
+ */
+static int
+acpi_wmi_wmistat_read(struct cdev *dev, struct uio *buf, int flag)
+{
+ struct acpi_wmi_softc *sc;
+ struct wmi_info *winfo;
+ int l;
+ int ret;
+ UINT8* guid;
+
+ if (dev == NULL || dev->si_drv1 == NULL)
+ return (EBADF);
+ sc = dev->si_drv1;
+
+ ACPI_SERIAL_BEGIN(acpi_wmi);
+ if (sc->wmistat_open_pid != buf->uio_td->td_proc->p_pid ||
+ sc->wmistat_bufptr == -1) {
+ ret = EBADF;
+ }
+ else {
+ if (!sbuf_done(&sc->wmistat_sbuf)) {
+ sbuf_printf(&sc->wmistat_sbuf, "GUID "
+ " INST EXPE METH STR "
+ "EVENT OID\n");
+ TAILQ_FOREACH(winfo, &wmi_info_list, wmi_list) {
+ guid = (UINT8*)winfo->ginfo.guid;
+ sbuf_printf(&sc->wmistat_sbuf,
+ "{%02X%02X%02X%02X-%02X%02X-"
+ "%02X%02X-%02X%02X-%02X%02X"
+ "%02X%02X%02X%02X} %3d %-5s",
+ guid[3], guid[2], guid[1], guid[0],
+ guid[5], guid[4],
+ guid[7], guid[6],
+ guid[8], guid[9],
+ guid[10], guid[11], guid[12],
+ guid[13], guid[14], guid[15],
+ winfo->ginfo.max_instance,
+ (winfo->ginfo.flags&
+ ACPI_WMI_REGFLAG_EXPENSIVE)?
+ "YES":"NO"
+ );
+ if (winfo->ginfo.flags&ACPI_WMI_REGFLAG_METHOD)
+ sbuf_printf(&sc->wmistat_sbuf,
+ "WM%c%c ",
+ winfo->ginfo.oid[0],
+ winfo->ginfo.oid[1]);
+ else
+ sbuf_printf(&sc->wmistat_sbuf, "NO ");
+ sbuf_printf(&sc->wmistat_sbuf, "%-4s",
+ (winfo->ginfo.flags&
+ ACPI_WMI_REGFLAG_STRING)?"YES":"NO"
+ );
+ if (winfo->ginfo.flags&ACPI_WMI_REGFLAG_EVENT)
+ sbuf_printf(&sc->wmistat_sbuf,
+ "0x%02X%s -\n",
+ (UINT8)winfo->ginfo.oid[0],
+ winfo->event_handler==NULL?
+ " ":"+");
+ else
+ sbuf_printf(&sc->wmistat_sbuf,
+ "NO %c%c\n",
+ winfo->ginfo.oid[0],
+ winfo->ginfo.oid[1]);
+ }
+ sbuf_finish(&sc->wmistat_sbuf);
+ }
+ if (sbuf_len(&sc->wmistat_sbuf) <= 0) {
+ sbuf_delete(&sc->wmistat_sbuf);
+ sc->wmistat_bufptr = -1;
+ sc->wmistat_open_pid = 0;
+ ret = ENOMEM;
+ } else {
+ l = min(buf->uio_resid, sbuf_len(&sc->wmistat_sbuf) -
+ sc->wmistat_bufptr);
+ ret = (l > 0)?uiomove(sbuf_data(&sc->wmistat_sbuf) +
+ sc->wmistat_bufptr, l, buf) : 0;
+ sc->wmistat_bufptr += l;
+ }
+ }
+ ACPI_SERIAL_END(acpi_wmi);
+
+ return (ret);
+}