07bed1516d
MFC after: 2 weeks
1007 lines
28 KiB
C
1007 lines
28 KiB
C
/*-
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* Copyright (c) 2009 Michael Gmelin <freebsd@grem.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Driver for acpi-wmi mapping, provides an interface for vendor specific
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* implementations (e.g. HP and Acer laptops).
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* Inspired by the ACPI-WMI mapping driver (c) 2008-2008 Carlos Corbacho which
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* implements this functionality for Linux.
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*
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* WMI and ACPI: http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx
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* acpi-wmi for Linux: http://www.kernel.org
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*/
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/uio.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/sbuf.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <dev/acpica/acpivar.h>
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#include "acpi_wmi_if.h"
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MALLOC_DEFINE(M_ACPIWMI, "acpiwmi", "ACPI-WMI mapping");
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#define _COMPONENT ACPI_OEM
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ACPI_MODULE_NAME("ACPI_WMI");
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#define ACPI_WMI_REGFLAG_EXPENSIVE 0x1 /* GUID flag: Expensive operation */
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#define ACPI_WMI_REGFLAG_METHOD 0x2 /* GUID flag: Method call */
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#define ACPI_WMI_REGFLAG_STRING 0x4 /* GUID flag: String */
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#define ACPI_WMI_REGFLAG_EVENT 0x8 /* GUID flag: Event */
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/*
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* acpi_wmi driver private structure
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*/
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struct acpi_wmi_softc {
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device_t wmi_dev; /* wmi device id */
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ACPI_HANDLE wmi_handle; /* handle of the PNP0C14 node */
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device_t ec_dev; /* acpi_ec0 */
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struct cdev *wmistat_dev_t; /* wmistat device handle */
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struct sbuf wmistat_sbuf; /* sbuf for /dev/wmistat output */
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pid_t wmistat_open_pid; /* pid operating on /dev/wmistat */
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int wmistat_bufptr; /* /dev/wmistat ptr to buffer position */
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};
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/*
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* Struct that holds information about
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* about a single GUID entry in _WDG
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*/
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struct guid_info {
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char guid[16]; /* 16 byte non human readable GUID */
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char oid[2]; /* object id or event notify id (first byte) */
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UINT8 max_instance; /* highest instance known for this GUID */
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UINT8 flags; /* ACPI_WMI_REGFLAG_%s */
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};
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/* WExx event generation state (on/off) */
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enum event_generation_state {
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EVENT_GENERATION_ON = 1,
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EVENT_GENERATION_OFF = 0
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};
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/*
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* Information about one entry in _WDG.
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* List of those is used to lookup information by GUID.
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*/
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struct wmi_info {
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TAILQ_ENTRY(wmi_info) wmi_list;
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struct guid_info ginfo; /* information on guid */
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ACPI_NOTIFY_HANDLER event_handler;/* client provided event handler */
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void *event_handler_user_data; /* ev handler cookie */
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};
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TAILQ_HEAD(wmi_info_list_head, wmi_info)
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wmi_info_list = TAILQ_HEAD_INITIALIZER(wmi_info_list);
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ACPI_SERIAL_DECL(acpi_wmi, "ACPI-WMI Mapping");
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/* public interface - declaration */
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/* standard device interface*/
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static int acpi_wmi_probe(device_t dev);
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static int acpi_wmi_attach(device_t dev);
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static int acpi_wmi_detach(device_t dev);
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/* see acpi_wmi_if.m */
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static int acpi_wmi_provides_guid_string_method(device_t dev,
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const char *guid_string);
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static ACPI_STATUS acpi_wmi_evaluate_call_method(device_t dev,
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const char *guid_string, UINT8 instance,
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UINT32 method_id, const ACPI_BUFFER *in,
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ACPI_BUFFER *out);
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static ACPI_STATUS acpi_wmi_install_event_handler_method(device_t dev,
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const char *guid_string, ACPI_NOTIFY_HANDLER handler,
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void *data);
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static ACPI_STATUS acpi_wmi_remove_event_handler_method(device_t dev,
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const char *guid_string);
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static ACPI_STATUS acpi_wmi_get_event_data_method(device_t dev,
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UINT32 event_id, ACPI_BUFFER *out);
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static ACPI_STATUS acpi_wmi_get_block_method(device_t dev,
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const char *guid_string,
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UINT8 instance, ACPI_BUFFER *out);
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static ACPI_STATUS acpi_wmi_set_block_method(device_t dev,
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const char *guid_string,
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UINT8 instance, const ACPI_BUFFER *in);
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/* private interface - declaration */
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/* callbacks */
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static void acpi_wmi_notify_handler(ACPI_HANDLE h, UINT32 notify,
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void *context);
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static ACPI_STATUS acpi_wmi_ec_handler(UINT32 function,
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ACPI_PHYSICAL_ADDRESS address, UINT32 width,
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ACPI_INTEGER *value, void *context,
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void *region_context);
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/* helpers */
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static ACPI_STATUS acpi_wmi_read_wdg_blocks(ACPI_HANDLE h);
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static ACPI_STATUS acpi_wmi_toggle_we_event_generation(device_t dev,
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struct wmi_info *winfo,
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enum event_generation_state state);
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static int acpi_wmi_guid_string_to_guid(const UINT8 *guid_string,
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UINT8 *guid);
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static struct wmi_info* acpi_wmi_lookup_wmi_info_by_guid_string(
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const char *guid_string);
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static d_open_t acpi_wmi_wmistat_open;
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static d_close_t acpi_wmi_wmistat_close;
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static d_read_t acpi_wmi_wmistat_read;
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/* handler /dev/wmistat device */
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static struct cdevsw wmistat_cdevsw = {
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.d_version = D_VERSION,
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.d_open = acpi_wmi_wmistat_open,
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.d_close = acpi_wmi_wmistat_close,
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.d_read = acpi_wmi_wmistat_read,
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.d_name = "wmistat",
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};
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static device_method_t acpi_wmi_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, acpi_wmi_probe),
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DEVMETHOD(device_attach, acpi_wmi_attach),
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DEVMETHOD(device_detach, acpi_wmi_detach),
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/* acpi_wmi interface */
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DEVMETHOD(acpi_wmi_provides_guid_string,
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acpi_wmi_provides_guid_string_method),
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DEVMETHOD(acpi_wmi_evaluate_call, acpi_wmi_evaluate_call_method),
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DEVMETHOD(acpi_wmi_install_event_handler,
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acpi_wmi_install_event_handler_method),
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DEVMETHOD(acpi_wmi_remove_event_handler,
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acpi_wmi_remove_event_handler_method),
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DEVMETHOD(acpi_wmi_get_event_data, acpi_wmi_get_event_data_method),
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DEVMETHOD(acpi_wmi_get_block, acpi_wmi_get_block_method),
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DEVMETHOD(acpi_wmi_set_block, acpi_wmi_set_block_method),
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{0, 0}
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};
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static driver_t acpi_wmi_driver = {
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"acpi_wmi",
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acpi_wmi_methods,
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sizeof(struct acpi_wmi_softc),
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};
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static devclass_t acpi_wmi_devclass;
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DRIVER_MODULE(acpi_wmi, acpi, acpi_wmi_driver, acpi_wmi_devclass, 0, 0);
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MODULE_VERSION(acpi_wmi, 1);
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MODULE_DEPEND(acpi_wmi, acpi, 1, 1, 1);
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static char *wmi_ids[] = {"PNP0C14", "PNP0c14", NULL};
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/*
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* Probe for the PNP0C14 ACPI node
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*/
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static int
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acpi_wmi_probe(device_t dev)
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{
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if (acpi_disabled("wmi") ||
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ACPI_ID_PROBE(device_get_parent(dev), dev, wmi_ids) == NULL)
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return (ENXIO);
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device_set_desc(dev, "ACPI-WMI mapping");
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return (0);
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}
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/*
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* Attach the device by:
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* - Looking for the first ACPI EC device
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* - Install the notify handler
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* - Install the EC address space handler
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* - Look for the _WDG node and read GUID information blocks
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*/
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static int
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acpi_wmi_attach(device_t dev)
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{
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struct acpi_wmi_softc *sc;
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int ret;
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ACPI_STATUS status;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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sc = device_get_softc(dev);
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ret = ENXIO;
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ACPI_SERIAL_BEGIN(acpi_wmi);
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sc->wmi_dev = dev;
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sc->wmi_handle = acpi_get_handle(dev);
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TAILQ_INIT(&wmi_info_list);
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/* XXX Only works with one EC, but nearly all systems only have one. */
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if ((sc->ec_dev = devclass_get_device(devclass_find("acpi_ec"), 0))
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== NULL)
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device_printf(dev, "cannot find EC device\n");
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else if (ACPI_FAILURE((status = AcpiInstallNotifyHandler(sc->wmi_handle,
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ACPI_DEVICE_NOTIFY, acpi_wmi_notify_handler, sc))))
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device_printf(sc->wmi_dev, "couldn't install notify handler - %s\n",
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AcpiFormatException(status));
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else if (ACPI_FAILURE((status = AcpiInstallAddressSpaceHandler(
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sc->wmi_handle, ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler,
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NULL, sc)))) {
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device_printf(sc->wmi_dev, "couldn't install EC handler - %s\n",
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AcpiFormatException(status));
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AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
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acpi_wmi_notify_handler);
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} else if (ACPI_FAILURE((status = acpi_wmi_read_wdg_blocks(
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sc->wmi_handle)))) {
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device_printf(sc->wmi_dev, "couldn't parse _WDG - %s\n",
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AcpiFormatException(status));
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AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
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acpi_wmi_notify_handler);
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AcpiRemoveAddressSpaceHandler(sc->wmi_handle, ACPI_ADR_SPACE_EC,
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acpi_wmi_ec_handler);
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} else {
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sc->wmistat_dev_t = make_dev(&wmistat_cdevsw, 0, UID_ROOT,
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GID_WHEEL, 0644, "wmistat");
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sc->wmistat_dev_t->si_drv1 = sc;
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sc->wmistat_open_pid = 0;
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sc->wmistat_bufptr = -1;
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ret = 0;
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}
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ACPI_SERIAL_END(acpi_wmi);
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return (ret);
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}
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/*
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* Detach the driver by:
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* - Removing notification handler
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* - Removing address space handler
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* - Turning off event generation for all WExx event activated by
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* child drivers
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*/
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static int
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acpi_wmi_detach(device_t dev)
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{
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struct wmi_info *winfo, *tmp;
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struct acpi_wmi_softc *sc;
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int ret;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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sc = device_get_softc(dev);
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ACPI_SERIAL_BEGIN(acpi_wmi);
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if (sc->wmistat_open_pid != 0) {
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ret = EBUSY;
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} else {
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AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
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acpi_wmi_notify_handler);
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AcpiRemoveAddressSpaceHandler(sc->wmi_handle,
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ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler);
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TAILQ_FOREACH_SAFE(winfo, &wmi_info_list, wmi_list, tmp) {
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if (winfo->event_handler)
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acpi_wmi_toggle_we_event_generation(dev,
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winfo, EVENT_GENERATION_OFF);
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TAILQ_REMOVE(&wmi_info_list, winfo, wmi_list);
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free(winfo, M_ACPIWMI);
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}
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if (sc->wmistat_bufptr != -1) {
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sbuf_delete(&sc->wmistat_sbuf);
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sc->wmistat_bufptr = -1;
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}
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sc->wmistat_open_pid = 0;
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destroy_dev(sc->wmistat_dev_t);
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ret = 0;
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}
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ACPI_SERIAL_END(acpi_wmi);
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return (ret);
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}
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/*
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* Check if the given GUID string (human readable format
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* AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP)
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* exists within _WDG
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*/
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static int
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acpi_wmi_provides_guid_string_method(device_t dev, const char *guid_string)
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{
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int ret;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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ACPI_SERIAL_BEGIN(acpi_wmi);
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ret = (acpi_wmi_lookup_wmi_info_by_guid_string(guid_string) == NULL)?0:1;
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ACPI_SERIAL_END(acpi_wmi);
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return (ret);
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}
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/*
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* Call a method "method_id" on the given GUID block
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* write result into user provided output buffer
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*/
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static ACPI_STATUS
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acpi_wmi_evaluate_call_method(device_t dev, const char *guid_string,
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UINT8 instance, UINT32 method_id, const ACPI_BUFFER *in, ACPI_BUFFER *out)
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{
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ACPI_OBJECT params[3];
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ACPI_OBJECT_LIST input;
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char method[5] = "WMxx";
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struct wmi_info *winfo;
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struct acpi_wmi_softc *sc;
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ACPI_STATUS status;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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sc = device_get_softc(dev);
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ACPI_SERIAL_BEGIN(acpi_wmi);
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if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string))
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== NULL)
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status = AE_NOT_FOUND;
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else if (!(winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD))
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status = AE_BAD_DATA;
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else if (instance > winfo->ginfo.max_instance)
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status = AE_BAD_PARAMETER;
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else {
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params[0].Type = ACPI_TYPE_INTEGER;
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params[0].Integer.Value = instance;
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params[1].Type = ACPI_TYPE_INTEGER;
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params[1].Integer.Value = method_id;
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input.Pointer = params;
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input.Count = 2;
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if (in) {
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params[2].Type =
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(winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING)
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?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER;
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params[2].Buffer.Length = in->Length;
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params[2].Buffer.Pointer = in->Pointer;
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input.Count = 3;
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}
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method[2] = winfo->ginfo.oid[0];
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method[3] = winfo->ginfo.oid[1];
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status = AcpiEvaluateObject(sc->wmi_handle, method,
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&input, out);
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}
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ACPI_SERIAL_END(acpi_wmi);
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return (status);
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}
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/*
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* Install a user provided event_handler on the given GUID
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* provided *data will be passed on callback
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* If there is already an existing event handler registered it will be silently
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* discarded
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*/
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static ACPI_STATUS
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acpi_wmi_install_event_handler_method(device_t dev, const char *guid_string,
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ACPI_NOTIFY_HANDLER event_handler, void *data)
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{
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struct wmi_info *winfo;
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ACPI_STATUS status;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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status = AE_OK;
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ACPI_SERIAL_BEGIN(acpi_wmi);
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if (guid_string == NULL || event_handler == NULL)
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status = AE_BAD_PARAMETER;
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else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string))
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== NULL)
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status = AE_NOT_EXIST;
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else if (winfo->event_handler != NULL ||
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(status = acpi_wmi_toggle_we_event_generation(dev, winfo,
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EVENT_GENERATION_ON)) == AE_OK) {
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winfo->event_handler = event_handler;
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winfo->event_handler_user_data = data;
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}
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ACPI_SERIAL_END(acpi_wmi);
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return (status);
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}
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/*
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* Remove a previously installed event handler from the given GUID
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* If there was none installed, this call is silently discarded and
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* reported as AE_OK
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*/
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static ACPI_STATUS
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acpi_wmi_remove_event_handler_method(device_t dev, const char *guid_string)
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{
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struct wmi_info *winfo;
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ACPI_STATUS status;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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status = AE_OK;
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ACPI_SERIAL_BEGIN(acpi_wmi);
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if (guid_string &&
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(winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string))
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!= NULL && winfo->event_handler) {
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status = acpi_wmi_toggle_we_event_generation(dev, winfo,
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EVENT_GENERATION_OFF);
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winfo->event_handler = NULL;
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winfo->event_handler_user_data = NULL;
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}
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ACPI_SERIAL_END(acpi_wmi);
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return (status);
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|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|