int acpi_ec_intr = 1; /* Default is interrupt mode */
+static u32 wmi_event_data_index = 0;
+extern u8 in_query_wmi_event_data;
+extern const u8 wmi_ec_max_data_size;
+extern u32 wmi_ec_port_data_size;
+extern u8 wmi_ec_port_data[32];
+
/* --------------------------------------------------------------------------
Transaction Management
-------------------------------------------------------------------------- */
result = acpi_ec_transaction(ec, &t, 0);
*data = d;
+
+ /* HACK ALERT
+ * Please refer to wmi.c for an explanation on why we added this hack.
+ */
+ if ( in_query_wmi_event_data == TRUE ) {
+ if ( address == 0x2b ) {
+ wmi_event_data_index = 0;
+ memset(wmi_ec_port_data, 0, wmi_ec_max_data_size);
+ wmi_ec_port_data_size = *data;
+ } else if ( (address == 0x2c) && (wmi_event_data_index < wmi_ec_port_data_size)
+ && (wmi_event_data_index < wmi_ec_max_data_size) ) {
+ wmi_ec_port_data[wmi_event_data_index] = *data;
+ wmi_event_data_index++;
+ }
+ }
+
return result;
}
/*
* ACPI-WMI mapping driver
*
- * Copyright (C) 2007-2008 Carlos Corbacho <carlos@strangeworlds.co.uk>
+ * Copyright (C) 2007-2008 Carlos Corbacho <carlos <at> strangeworlds.co.uk>
*
- * GUID parsing code from ldm.c is:
- * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
- * Copyright (c) 2001-2007 Anton Altaparmakov
- * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
+ * Modifications:
+ * Copyright (c) 2009 Kamala Narasimhan - Citrix Systems, Inc.
*
+ * Following modifications where made to fit our usecase -
+ * a) Route WMI events to acpid.
+ * b) Remove exports not required for our usecase, remove notification
+ * installation/uninstallation code (as we now route events to acpid).
+ * c) Minor device id issue.
+ * d) Remove GUID parsing code as our usecase does not require supporting
+ * 36 char guid input.
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
#include <linux/types.h>
#include <linux/list.h>
#include <linux/acpi.h>
+#include <linux/dmi.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#undef PREFIX
#define PREFIX "ACPI: WMI: "
-static DEFINE_MUTEX(wmi_data_lock);
-
struct guid_block {
char guid[16];
union {
struct list_head list;
struct guid_block gblock;
acpi_handle handle;
- wmi_notify_handler handler;
- void *handler_data;
};
static struct wmi_block wmi_blocks;
+static DEFINE_MUTEX(wmi_mutex);
+
+/*
+ * YIKEES! HACK ALERT
+ * Due to buffer dereferencing bugs at firmware layer, some firmware(s)
+ * (Dell in specific) return all 0s for wmi event data when
+ * queried through _WED. To work around this firmware bug and provide
+ * appropriate event data to guest firmware, we will sniff the embedded
+ * controller port access to addresses 0x2b and 0x2c and slap that data
+ * at the beginning of _WED return buffer which would otherwise be all 0s.
+ */
+static u8 enable_wmi_event_data_hack = FALSE;
+u8 in_query_wmi_event_data = FALSE;
+const u8 wmi_ec_max_data_size = 32;
+u32 wmi_ec_port_data_size = 0;
+u8 wmi_ec_port_data[32];
/*
* If the GUID data block is marked as expensive, we must enable and
static int acpi_wmi_remove(struct acpi_device *device, int type);
static int acpi_wmi_add(struct acpi_device *device);
-
static const struct acpi_device_id wmi_device_ids[] = {
- {"PNP0C14", 0},
- {"pnp0c14", 0},
- {"", 0},
+ {"PNP0C14", 0},
+ {"pnp0c14", 0},
+ {"", 0},
};
MODULE_DEVICE_TABLE(acpi, wmi_device_ids);
},
};
-/*
- * GUID parsing functions
- */
-
-/**
- * wmi_parse_hexbyte - Convert a ASCII hex number to a byte
- * @src: Pointer to at least 2 characters to convert.
- *
- * Convert a two character ASCII hex string to a number.
- *
- * Return: 0-255 Success, the byte was parsed correctly
- * -1 Error, an invalid character was supplied
- */
-static int wmi_parse_hexbyte(const u8 *src)
-{
- unsigned int x; /* For correct wrapping */
- int h;
-
- /* high part */
- x = src[0];
- if (x - '0' <= '9' - '0') {
- h = x - '0';
- } else if (x - 'a' <= 'f' - 'a') {
- h = x - 'a' + 10;
- } else if (x - 'A' <= 'F' - 'A') {
- h = x - 'A' + 10;
- } else {
- return -1;
- }
- h <<= 4;
-
- /* low part */
- x = src[1];
- if (x - '0' <= '9' - '0')
- return h | (x - '0');
- if (x - 'a' <= 'f' - 'a')
- return h | (x - 'a' + 10);
- if (x - 'A' <= 'F' - 'A')
- return h | (x - 'A' + 10);
- return -1;
-}
-
-/**
- * wmi_swap_bytes - Rearrange GUID bytes to match GUID binary
- * @src: Memory block holding binary GUID (16 bytes)
- * @dest: Memory block to hold byte swapped binary GUID (16 bytes)
- *
- * Byte swap a binary GUID to match it's real GUID value
- */
-static void wmi_swap_bytes(u8 *src, u8 *dest)
-{
- int i;
-
- for (i = 0; i <= 3; i++)
- memcpy(dest + i, src + (3 - i), 1);
-
- for (i = 0; i <= 1; i++)
- memcpy(dest + 4 + i, src + (5 - i), 1);
-
- for (i = 0; i <= 1; i++)
- memcpy(dest + 6 + i, src + (7 - i), 1);
-
- memcpy(dest + 8, src + 8, 8);
-}
-
-/**
- * wmi_parse_guid - Convert GUID from ASCII to binary
- * @src: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
- * @dest: Memory block to hold binary GUID (16 bytes)
- *
- * N.B. The GUID need not be NULL terminated.
- *
- * Return: 'true' @dest contains binary GUID
- * 'false' @dest contents are undefined
- */
-static bool wmi_parse_guid(const u8 *src, u8 *dest)
-{
- static const int size[] = { 4, 2, 2, 2, 6 };
- int i, j, v;
-
- if (src[8] != '-' || src[13] != '-' ||
- src[18] != '-' || src[23] != '-')
- return false;
-
- for (j = 0; j < 5; j++, src++) {
- for (i = 0; i < size[j]; i++, src += 2, *dest++ = v) {
- v = wmi_parse_hexbyte(src);
- if (v < 0)
- return false;
- }
- }
-
- return true;
-}
-
static bool find_guid(const char *guid_string, struct wmi_block **out)
{
- char tmp[16], guid_input[16];
struct wmi_block *wblock;
struct guid_block *block;
struct list_head *p;
- wmi_parse_guid(guid_string, tmp);
- wmi_swap_bytes(tmp, guid_input);
-
list_for_each(p, &wmi_blocks.list) {
wblock = list_entry(p, struct wmi_block, list);
block = &wblock->gblock;
- if (memcmp(block->guid, guid_input, 16) == 0) {
+ if (memcmp(block->guid, guid_string, 16) == 0) {
if (out)
*out = wblock;
return 1;
return 0;
}
+static acpi_status wmi_enable_event_data_blocks(int enable)
+{
+ struct list_head *p;
+ struct guid_block *gblock;
+ struct wmi_block *wblock;
+ char method[5];
+ struct acpi_object_list input;
+ union acpi_object params[1];
+ acpi_status status;
+
+ list_for_each(p, &wmi_blocks.list) {
+ wblock = list_entry(p, struct wmi_block, list);
+ gblock = &wblock->gblock;
+
+ if (gblock->flags & ACPI_WMI_EVENT) {
+ input.count = 1;
+ input.pointer = params;
+ params[0].type = ACPI_TYPE_INTEGER;
+ params[0].integer.value = enable;
+
+ snprintf(method, 5, "WE%02X", gblock->notify_id);
+ status = acpi_evaluate_object(wblock->handle, method, &input, NULL);
+
+ if (status != AE_OK && status != AE_NOT_FOUND) {
+ printk(KERN_INFO PREFIX "Event block %s enable failed\n", method);
+ return status;
+ } else
+ return AE_OK;
+ }
+ }
+
+ return AE_OK; /* if we don't have a wmi block (though odd), just return success */
+}
+
/*
* Exported WMI functions
*/
/**
* wmi_evaluate_method - Evaluate a WMI method
- * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @guid_string: 16 byte guid
* @instance: Instance index
* @method_id: Method ID to call
* &in: Buffer containing input for the method call
block = &wblock->gblock;
handle = wblock->handle;
- if (!(block->flags & ACPI_WMI_METHOD))
+ if (!(block->flags & ACPI_WMI_METHOD))
return AE_BAD_DATA;
if (block->instance_count < instance)
/**
* wmi_query_block - Return contents of a WMI block
- * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @guid_string: 16 byte guid
* @instance: Instance index
* &out: Empty buffer to return the contents of the data block to
*
* expensive, but have no corresponding WCxx method. So we
* should not fail if this happens.
*/
- wc_status = acpi_get_handle(handle, wc_method, &wc_handle);
- if (ACPI_SUCCESS(wc_status))
- wc_status = acpi_evaluate_object(handle, wc_method,
- &wc_input, NULL);
+ wc_status = acpi_get_handle(handle, wc_method, &wc_handle);
+ if (ACPI_SUCCESS(wc_status))
+ wc_status = acpi_evaluate_object(handle, wc_method,
+ &wc_input, NULL);
}
strcpy(method, "WQ");
/**
* wmi_set_block - Write to a WMI block
- * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @guid_string: 16 byte guid
* @instance: Instance index
* &in: Buffer containing new values for the data block
*
}
EXPORT_SYMBOL_GPL(wmi_set_block);
-/**
- * wmi_install_notify_handler - Register handler for WMI events
- * @handler: Function to handle notifications
- * @data: Data to be returned to handler when event is fired
- *
- * Register a handler for events sent to the ACPI-WMI mapper device.
- */
-acpi_status wmi_install_notify_handler(const char *guid,
-wmi_notify_handler handler, void *data)
-{
- struct wmi_block *block;
-
- if (!guid || !handler)
- return AE_BAD_PARAMETER;
-
- find_guid(guid, &block);
- if (!block)
- return AE_NOT_EXIST;
-
- if (block->handler)
- return AE_ALREADY_ACQUIRED;
-
- block->handler = handler;
- block->handler_data = data;
-
- return AE_OK;
-}
-EXPORT_SYMBOL_GPL(wmi_install_notify_handler);
-
-/**
- * wmi_uninstall_notify_handler - Unregister handler for WMI events
- *
- * Unregister handler for events sent to the ACPI-WMI mapper device.
- */
-acpi_status wmi_remove_notify_handler(const char *guid)
-{
- struct wmi_block *block;
-
- if (!guid)
- return AE_BAD_PARAMETER;
-
- find_guid(guid, &block);
- if (!block)
- return AE_NOT_EXIST;
-
- if (!block->handler)
- return AE_NULL_ENTRY;
-
- block->handler = NULL;
- block->handler_data = NULL;
-
- return AE_OK;
-}
-EXPORT_SYMBOL_GPL(wmi_remove_notify_handler);
-
/**
* wmi_get_event_data - Get WMI data associated with an event
*
struct guid_block *gblock;
struct wmi_block *wblock;
struct list_head *p;
+ acpi_status status;
+ uint count;
input.count = 1;
input.pointer = params;
gblock = &wblock->gblock;
if ((gblock->flags & ACPI_WMI_EVENT) &&
- (gblock->notify_id == event))
- return acpi_evaluate_object(wblock->handle, "_WED",
+ (gblock->notify_id == event)) {
+ mutex_lock(&wmi_mutex);
+ if ( enable_wmi_event_data_hack == TRUE ) {
+ wmi_ec_port_data_size = 0;
+ memset(wmi_ec_port_data, 0, 32);
+ in_query_wmi_event_data = TRUE;
+ }
+ status = acpi_evaluate_object(wblock->handle, "_WED",
&input, out);
+ if ( enable_wmi_event_data_hack == TRUE ) {
+ for ( count = 0; count < wmi_ec_port_data_size; count++)
+ ((char *)((union acpi_object *)
+ out->pointer)->buffer.pointer)[count]
+ = wmi_ec_port_data[count];
+ in_query_wmi_event_data = FALSE;
+ }
+ mutex_unlock(&wmi_mutex);
+ return status;
+ }
}
return AE_NOT_FOUND;
}
EXPORT_SYMBOL_GPL(wmi_get_event_data);
-/**
- * wmi_has_guid - Check if a GUID is available
- * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
- *
- * Check if a given GUID is defined by _WDG
- */
-bool wmi_has_guid(const char *guid_string)
-{
- return find_guid(guid_string, NULL);
-}
-EXPORT_SYMBOL_GPL(wmi_has_guid);
-
/*
* Parse the _WDG method for the GUID data blocks
*/
if ((block->flags & ACPI_WMI_EVENT) &&
(block->notify_id == event)) {
- if (wblock->handler)
- wblock->handler(event, wblock->handler_data);
-
- acpi_bus_generate_netlink_event(
- device->pnp.device_class, device->dev.bus_id,
- event, 0);
+ acpi_bus_generate_proc_event(device, event, 0);
break;
}
}
acpi_remove_address_space_handler(device->handle,
ACPI_ADR_SPACE_EC, &acpi_wmi_ec_space_handler);
+ wmi_enable_event_data_blocks(0);
return 0;
}
ACPI_ADR_SPACE_EC,
&acpi_wmi_ec_space_handler,
NULL, NULL);
- if (ACPI_FAILURE(status))
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX "Error installing EC region handler\n");
return -ENODEV;
+ }
status = parse_wdg(device->handle);
if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX "Error installing EC region handler\n");
+ printk(KERN_ERR PREFIX "parse_wdg failed!\n");
return -ENODEV;
}
+ /* No need to check and fail if wmi_enable_event_data_blocks should fail.
+ * wmi_enable_event_data_blocks will print an error message.
+ */
+ wmi_enable_event_data_blocks(1);
return result;
}
static int __init acpi_wmi_init(void)
{
acpi_status result;
+ char *dmi_sys_info;
INIT_LIST_HEAD(&wmi_blocks.list);
- if (acpi_disabled)
- return -ENODEV;
+ if (acpi_disabled)
+ return -ENODEV;
result = acpi_bus_register_driver(&acpi_wmi_driver);
printk(KERN_INFO PREFIX "Mapper loaded\n");
}
+ dmi_sys_info = dmi_get_system_info(DMI_SYS_VENDOR);
+ if ( dmi_sys_info == NULL )
+ return result;
+
+ if ( strstr(dmi_sys_info, "Dell") != NULL )
+ enable_wmi_event_data_hack = TRUE;
+
return result;
}
printk(KERN_INFO PREFIX "Mapper unloaded\n");
}
-subsys_initcall(acpi_wmi_init);
+module_init(acpi_wmi_init);
module_exit(acpi_wmi_exit);
Specify the total number of virtual devices (i.e. both frontend
and backend) that you want the kernel to be able to service.
+config XEN_ACPI_WMI_WRAPPER
+ tristate "Xen ACPI WMI wrapper driver"
+ depends on ACPI_WMI
+ help
+ Facilitates OEM specific hotkey implementation within
+ guest space.
+
choice
prompt "Xen version compatibility"
default XEN_COMPAT_030002_AND_LATER
obj-$(CONFIG_XEN_NETDEV_ACCEL_SFC_UTIL) += sfc_netutil/
obj-$(CONFIG_XEN_NETDEV_ACCEL_SFC_FRONTEND) += sfc_netfront/
obj-$(CONFIG_XEN_NETDEV_ACCEL_SFC_BACKEND) += sfc_netback/
+obj-$(CONFIG_XEN_ACPI_WMI_WRAPPER) += acpi-wmi/
--- /dev/null
+
+obj-y := acpi-wmi.o
--- /dev/null
+/******************************************************************************
+ * drivers/xen/acpi-wmi/acpi-wmi.c
+ *
+ * Copyright (c) 2009 Kamala Narasimhan
+ * Copyright (c) 2009 Citrix Systems, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/* Xen acpi-wmi implementation provides the interface required for userspace
+ * module (qemu) to communicate with acpi wmi wrapper kernel driver.
+ * Upon receiving request from qemu to call a WMI method or query or set WMI
+ * data, it communicates the request to kernel acpi wmi layer which then
+ * interacts with the base firmware to get the necessary information/execute
+ * relevant AML method etc. The result returned by the base firmware is then
+ * communicated back to the userspace module (qemu).
+ */
+
+#include <linux/module.h>
+#include <linux/miscdevice.h>
+#include <linux/acpi.h>
+#include <asm/uaccess.h>
+#include <xen/public/acpi-wmi.h>
+
+/* #define XEN_WMI_DEBUG */
+
+static bool xen_wmi_misc_dev_registered = false;
+static int xen_wmi_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg);
+
+static struct file_operations xen_wmi_fops = {
+ .owner = THIS_MODULE,
+ .ioctl = xen_wmi_ioctl,
+};
+
+static struct miscdevice xen_wmi_misc = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = XEN_WMI_DEVICE_NAME,
+ .fops = &xen_wmi_fops,
+};
+
+/*
+ * xen_wmi_copy_input_buffer
+ */
+int xen_wmi_copy_input_buffer(xen_wmi_buffer_t *user_buf, struct acpi_buffer *acpi_buf)
+{
+ if ( user_buf->length <= 0 )
+ return XEN_WMI_SUCCESS;
+
+ acpi_buf->pointer = kmalloc(user_buf->length, GFP_KERNEL);
+ if ( acpi_buf->pointer == NULL )
+ {
+ printk("XEN WMI: xen_wmi_copy_input_buffer - Buffer allocation failure\n");
+ return XEN_WMI_NOT_ENOUGH_MEMORY;
+ }
+
+ if ( copy_from_user(acpi_buf->pointer,
+ (char __user *)user_buf->pointer,
+ user_buf->length) )
+ {
+ printk("XEN WMI: Unable to copy input buffer argument\n");
+ kfree(acpi_buf->pointer);
+ return XEN_WMI_EFAULT;
+ }
+
+ acpi_buf->length = user_buf->length;
+ return XEN_WMI_SUCCESS;
+}
+
+/*
+ * xen_wmi_copy_output_buffer
+ */
+int xen_wmi_copy_output_buffer(struct acpi_buffer *acpi_buf, xen_wmi_buffer_t *user_buf)
+{
+ /* IMPORTANT NOTE: It is a little short sighted to assume that the return type
+ * will not be anything other than buffer type. A follow-up check-in will
+ * cover more types.
+ */
+
+ union acpi_object *acpi_obj = acpi_buf->pointer;
+
+ if ( acpi_obj == NULL )
+ {
+ printk("XEN WMI: Invalid acpi buffer!\n");
+ return XEN_WMI_EFAULT;
+ }
+
+ if ( acpi_obj->type != ACPI_TYPE_BUFFER )
+ {
+ printk("XEN WMI: Unsupported acpi return object type - %d\n", acpi_obj->type);
+ return XEN_WMI_UNSUPPORTED_TYPE;
+ }
+
+ if ( copy_to_user((char __user *) user_buf->copied_length, &acpi_obj->buffer.length, sizeof(size_t)) )
+ {
+ printk("XEN WMI: Invalid copied length user buffer!\n");
+ return XEN_WMI_INVALID_ARGUMENT;
+ }
+
+ if ( user_buf->length < acpi_obj->buffer.length )
+ {
+ printk("XEN WMI: Required buffer length is - %d\n", acpi_obj->buffer.length);
+ printk("XEN WMI: Passed in length is - %d\n", user_buf->length);
+ return XEN_WMI_BUFFER_TOO_SMALL;
+ }
+
+ if ( copy_to_user((char __user *) user_buf->pointer, acpi_obj->buffer.pointer, acpi_obj->buffer.length) )
+ {
+ printk("XEN WMI: Invalid user output buffer\n");
+ return XEN_WMI_NOT_ENOUGH_MEMORY;
+ }
+
+ return XEN_WMI_SUCCESS;
+}
+
+#ifdef XEN_WMI_DEBUG
+
+/*
+ * xen_wmi_print_buffer
+ */
+void xen_wmi_print_buffer(struct acpi_buffer *acpi_buf)
+{
+ int count;
+ union acpi_object *acpi_obj = acpi_buf->pointer;
+
+ if ( acpi_obj == NULL || acpi_obj->type != ACPI_TYPE_BUFFER )
+ {
+ printk("XEN WMI: Unsupported output buffer data!\n");
+ return ;
+ }
+
+ printk("XEN WMI: Output buffer length is - %d\n", acpi_obj->buffer.length);
+ printk("XEN WMI: Buffer: ");
+ for (count=0; count < acpi_obj->buffer.length; count++)
+ printk("%d ", ((byte *)(acpi_obj->buffer.pointer))[count]);
+ printk("\n");
+}
+
+#endif /* XEN_WMI_DEBUG */
+
+/*
+ * xen_wmi_invoke_method
+ */
+int xen_wmi_invoke_method(xen_wmi_obj_invocation_data_t *obj_inv_data)
+{
+ int result;
+ struct acpi_buffer in_buf, *in_arg = NULL, out_buf = {ACPI_ALLOCATE_BUFFER, NULL};
+
+ result = xen_wmi_copy_input_buffer(&obj_inv_data->xen_wmi_arg.xen_wmi_method_arg.in_buf,
+ &in_buf);
+ if ( result != XEN_WMI_SUCCESS )
+ return result;
+
+ if ( in_buf.length > 0 )
+ in_arg = &in_buf;
+
+ result = wmi_evaluate_method(obj_inv_data->guid,
+ obj_inv_data->xen_wmi_arg.xen_wmi_method_arg.instance,
+ obj_inv_data->xen_wmi_arg.xen_wmi_method_arg.method_id,
+ in_arg, &out_buf);
+
+ if ( in_arg != NULL )
+ kfree(in_buf.pointer);
+
+ if ( out_buf.length > 0 && result == XEN_WMI_SUCCESS )
+ {
+#ifdef XEN_WMI_DEBUG
+ xen_wmi_print_buffer(&out_buf);
+#endif
+ result = xen_wmi_copy_output_buffer(&out_buf,
+ &obj_inv_data->xen_wmi_arg.xen_wmi_method_arg.out_buf);
+ kfree(out_buf.pointer);
+ }
+ else if ( result != XEN_WMI_SUCCESS )
+ printk("XEN WMI- Invoke WMI method failed with error - %d\n", result);
+
+ return result;
+}
+
+/*
+ * xen_wmi_query_object
+ */
+int xen_wmi_query_object(xen_wmi_obj_invocation_data_t *obj_inv_data)
+{
+ int result;
+ struct acpi_buffer out_buf = {ACPI_ALLOCATE_BUFFER, NULL};
+
+ result = wmi_query_block(obj_inv_data->guid,
+ obj_inv_data->xen_wmi_arg.xen_wmi_query_obj_arg.instance,
+ &out_buf);
+
+ if ( out_buf.length > 0 && result == XEN_WMI_SUCCESS )
+ {
+#ifdef XEN_WMI_DEBUG
+ xen_wmi_print_buffer(&out_buf);
+#endif
+ result = xen_wmi_copy_output_buffer(&out_buf,
+ &obj_inv_data->xen_wmi_arg.xen_wmi_query_obj_arg.out_buf);
+ kfree(out_buf.pointer);
+ }
+ else
+ printk("XEN WMI - Query WMI object failed with error - %d; output buffer length - %d\n",
+ result, out_buf.length);
+
+ return result;
+}
+
+/*
+ * xen_wmi_set_object
+ */
+int xen_wmi_set_object(xen_wmi_obj_invocation_data_t *obj_inv_data)
+{
+ int result;
+ struct acpi_buffer in_buf;
+
+ if ( obj_inv_data->xen_wmi_arg.xen_wmi_set_obj_arg.in_buf.length <= 0 )
+ return XEN_WMI_INVALID_ARGUMENT;
+
+ result = xen_wmi_copy_input_buffer(&obj_inv_data->xen_wmi_arg.xen_wmi_set_obj_arg.in_buf,
+ &in_buf);
+ if ( result != XEN_WMI_SUCCESS )
+ return result;
+
+ result = wmi_set_block(obj_inv_data->guid,
+ obj_inv_data->xen_wmi_arg.xen_wmi_set_obj_arg.instance,
+ &in_buf);
+ if ( result != XEN_WMI_SUCCESS )
+ printk("XEN WMI: Set object failed with error - %d\n", result);
+
+ kfree(in_buf.pointer);
+ return result;
+}
+
+/*
+ * xen_wmi_get_event_data
+ */
+int xen_wmi_get_event_data(xen_wmi_obj_invocation_data_t *obj_inv_data)
+{
+ int result;
+ struct acpi_buffer out_buf = {ACPI_ALLOCATE_BUFFER, NULL};
+
+ result = wmi_get_event_data(obj_inv_data->xen_wmi_arg.xen_wmi_event_data_arg.event_id,
+ &out_buf);
+
+ if ( out_buf.length > 0 && result == XEN_WMI_SUCCESS )
+ {
+#ifdef XEN_WMI_DEBUG
+ xen_wmi_print_buffer(&out_buf);
+#endif
+ result = xen_wmi_copy_output_buffer(&out_buf,
+ &obj_inv_data->xen_wmi_arg.xen_wmi_event_data_arg.out_buf);
+ kfree(out_buf.pointer);
+ }
+ else
+ printk("XEN WMI: Get event data failed with error - %d\n", result);
+
+ return result;
+}
+
+/*
+ * xen_wmi_ioctl
+ */
+static int xen_wmi_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ xen_wmi_obj_invocation_data_t obj_inv_data;
+
+#ifdef XEN_WMI_DEBUG
+ printk("XEN WMI: In xen_wmi_ioctl - %d\n", cmd);
+#endif
+
+ memset(&obj_inv_data, 0, sizeof(obj_inv_data));
+ if ( copy_from_user(&obj_inv_data, (char __user *)arg, sizeof(obj_inv_data)) )
+ {
+ printk("XEN WMI: Invalid object invocation parameter\n");
+ return XEN_WMI_EFAULT;
+ }
+
+ switch ( cmd )
+ {
+ case XEN_WMI_IOCTL_CALL_METHOD:
+ return xen_wmi_invoke_method(&obj_inv_data);
+ case XEN_WMI_IOCTL_QUERY_OBJECT:
+ return xen_wmi_query_object(&obj_inv_data);
+ case XEN_WMI_IOCTL_SET_OBJECT:
+ return xen_wmi_set_object(&obj_inv_data);
+ case XEN_WMI_IOCTL_GET_EVENT_DATA:
+ return xen_wmi_get_event_data(&obj_inv_data);
+ }
+
+ return XEN_WMI_ENOIOCTLCMD;
+}
+
+/*
+ * xen_wmi_init
+ */
+static int __init xen_wmi_init(void)
+{
+ int ret;
+
+ ret = misc_register(&xen_wmi_misc);
+ if ( ret < 0 )
+ printk("XEN WMI: misc_register failed with error - %d\n", ret);
+ else
+ xen_wmi_misc_dev_registered = true;
+
+#ifdef XEN_WMI_DEBUG
+ printk("XEN WMI: xen-acpi-wmi misc_register succeeded!\n");
+#endif
+ return ret;
+}
+
+/*
+ * xen_wmi_exit
+ */
+static void xen_wmi_exit(void)
+{
+ int ret;
+
+ if ( xen_wmi_misc_dev_registered == false )
+ return;
+
+ if ( (ret = misc_deregister(&xen_wmi_misc)) < 0 )
+ printk("XEN WMI: misc_deregister failed with error - %d\n", ret);
+}
+
+module_init(xen_wmi_init);
+module_exit(xen_wmi_exit);
+MODULE_LICENSE("Dual BSD/GPL");
+
--- /dev/null
+/******************************************************************************
+ * acpi-wmi.h
+ *
+ * Interface to /proc/misc/xen-acpi-wmi
+ *
+ * Copyright (c) 2009 Kamala Narasimhan
+ * Copyright (c) 2009 Citrix Systems, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+
+#ifndef _XEN_WMI_ACPI
+#define _XEN_WMI_ACPI
+
+/*
+ * Userspace Interface
+ */
+
+#define XEN_WMI_DEVICE_NAME "xen-acpi-wmi"
+#define XEN_WMI_GUID_SIZE 16
+
+#define XEN_WMI_SUCCESS 0
+#define XEN_WMI_UNSUPPORTED_TYPE -1
+#define XEN_WMI_BUFFER_TOO_SMALL -11
+#define XEN_WMI_NOT_ENOUGH_MEMORY -12
+#define XEN_WMI_EFAULT -14
+#define XEN_WMI_INVALID_ARGUMENT -22
+#define XEN_WMI_ENOIOCTLCMD -515
+
+#define XEN_WMI_IOCTL_CALL_METHOD 100
+#define XEN_WMI_IOCTL_QUERY_OBJECT 101
+#define XEN_WMI_IOCTL_SET_OBJECT 102
+#define XEN_WMI_IOCTL_GET_EVENT_DATA 103
+
+typedef unsigned char byte;
+
+typedef struct xen_wmi_buffer {
+ size_t length;
+ void *pointer;
+ size_t *copied_length;
+} xen_wmi_buffer_t;
+
+typedef struct xen_wmi_obj_invocation_data {
+ byte guid[XEN_WMI_GUID_SIZE];
+ union {
+ struct {
+ ushort instance;
+ uint method_id;
+ xen_wmi_buffer_t in_buf;
+ xen_wmi_buffer_t out_buf;
+ } xen_wmi_method_arg;
+
+ struct {
+ ushort instance;
+ xen_wmi_buffer_t out_buf;
+ } xen_wmi_query_obj_arg;
+
+ struct {
+ ushort instance;
+ xen_wmi_buffer_t in_buf;
+ } xen_wmi_set_obj_arg;
+
+ struct {
+ ushort event_id;
+ xen_wmi_buffer_t out_buf;
+ } xen_wmi_event_data_arg;
+ } xen_wmi_arg;
+} xen_wmi_obj_invocation_data_t;
+
+#endif /* _XEN_WMI_ACPI */
+
projects / people / ssmith / nc2-2.6.27.git / commitdiff