2005-04-17 06:20:36 +08:00
|
|
|
/*
|
2006-03-04 02:16:05 +08:00
|
|
|
* Common ACPI functions for hot plug platforms
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2006-03-04 02:16:05 +08:00
|
|
|
* Copyright (C) 2006 Intel Corporation
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
|
|
|
* All rights reserved.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License as published by
|
|
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
|
|
* your option) any later version.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful, but
|
|
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
|
|
* NON INFRINGEMENT. See the GNU General Public License for more
|
|
|
|
* details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
*
|
2005-08-17 06:16:10 +08:00
|
|
|
* Send feedback to <kristen.c.accardi@intel.com>
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/pci.h>
|
2006-03-04 02:16:05 +08:00
|
|
|
#include <acpi/acpi.h>
|
2005-04-17 06:20:36 +08:00
|
|
|
#include <acpi/acpi_bus.h>
|
|
|
|
#include <acpi/actypes.h>
|
2006-03-04 02:16:05 +08:00
|
|
|
#include "pci_hotplug.h"
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
#define METHOD_NAME__SUN "_SUN"
|
|
|
|
#define METHOD_NAME__HPP "_HPP"
|
|
|
|
#define METHOD_NAME_OSHP "OSHP"
|
|
|
|
|
|
|
|
|
2005-11-01 08:20:07 +08:00
|
|
|
static acpi_status
|
|
|
|
acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
acpi_status status;
|
|
|
|
u8 nui[4];
|
|
|
|
struct acpi_buffer ret_buf = { 0, NULL};
|
2006-03-17 08:18:39 +08:00
|
|
|
struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
|
2005-04-17 06:20:36 +08:00
|
|
|
union acpi_object *ext_obj, *package;
|
|
|
|
int i, len = 0;
|
|
|
|
|
2006-03-17 08:18:39 +08:00
|
|
|
acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/* get _hpp */
|
2005-11-01 08:20:07 +08:00
|
|
|
status = acpi_evaluate_object(handle, METHOD_NAME__HPP, NULL, &ret_buf);
|
2005-04-17 06:20:36 +08:00
|
|
|
switch (status) {
|
|
|
|
case AE_BUFFER_OVERFLOW:
|
|
|
|
ret_buf.pointer = kmalloc (ret_buf.length, GFP_KERNEL);
|
|
|
|
if (!ret_buf.pointer) {
|
2006-03-04 02:16:05 +08:00
|
|
|
printk(KERN_ERR "%s:%s alloc for _HPP fail\n",
|
2006-03-17 08:18:39 +08:00
|
|
|
__FUNCTION__, (char *)string.pointer);
|
|
|
|
acpi_os_free(string.pointer);
|
2005-11-01 08:20:07 +08:00
|
|
|
return AE_NO_MEMORY;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2005-11-01 08:20:07 +08:00
|
|
|
status = acpi_evaluate_object(handle, METHOD_NAME__HPP,
|
|
|
|
NULL, &ret_buf);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (ACPI_SUCCESS(status))
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
if (ACPI_FAILURE(status)) {
|
2006-03-04 02:16:05 +08:00
|
|
|
pr_debug("%s:%s _HPP fail=0x%x\n", __FUNCTION__,
|
2006-03-17 08:18:39 +08:00
|
|
|
(char *)string.pointer, status);
|
|
|
|
acpi_os_free(string.pointer);
|
2005-11-01 08:20:07 +08:00
|
|
|
return status;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
ext_obj = (union acpi_object *) ret_buf.pointer;
|
|
|
|
if (ext_obj->type != ACPI_TYPE_PACKAGE) {
|
2006-03-04 02:16:05 +08:00
|
|
|
printk(KERN_ERR "%s:%s _HPP obj not a package\n", __FUNCTION__,
|
2006-03-17 08:18:39 +08:00
|
|
|
(char *)string.pointer);
|
2005-11-01 08:20:07 +08:00
|
|
|
status = AE_ERROR;
|
2005-04-17 06:20:36 +08:00
|
|
|
goto free_and_return;
|
|
|
|
}
|
|
|
|
|
|
|
|
len = ext_obj->package.count;
|
|
|
|
package = (union acpi_object *) ret_buf.pointer;
|
|
|
|
for ( i = 0; (i < len) || (i < 4); i++) {
|
|
|
|
ext_obj = (union acpi_object *) &package->package.elements[i];
|
|
|
|
switch (ext_obj->type) {
|
|
|
|
case ACPI_TYPE_INTEGER:
|
|
|
|
nui[i] = (u8)ext_obj->integer.value;
|
|
|
|
break;
|
|
|
|
default:
|
2006-03-04 02:16:05 +08:00
|
|
|
printk(KERN_ERR "%s:%s _HPP obj type incorrect\n",
|
2006-03-17 08:18:39 +08:00
|
|
|
__FUNCTION__, (char *)string.pointer);
|
2005-11-01 08:20:07 +08:00
|
|
|
status = AE_ERROR;
|
2005-04-17 06:20:36 +08:00
|
|
|
goto free_and_return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-11-01 08:20:07 +08:00
|
|
|
hpp->cache_line_size = nui[0];
|
|
|
|
hpp->latency_timer = nui[1];
|
|
|
|
hpp->enable_serr = nui[2];
|
|
|
|
hpp->enable_perr = nui[3];
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-03-04 02:16:05 +08:00
|
|
|
pr_debug(" _HPP: cache_line_size=0x%x\n", hpp->cache_line_size);
|
|
|
|
pr_debug(" _HPP: latency timer =0x%x\n", hpp->latency_timer);
|
|
|
|
pr_debug(" _HPP: enable SERR =0x%x\n", hpp->enable_serr);
|
|
|
|
pr_debug(" _HPP: enable PERR =0x%x\n", hpp->enable_perr);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
free_and_return:
|
2006-03-17 08:18:39 +08:00
|
|
|
acpi_os_free(string.pointer);
|
|
|
|
acpi_os_free(ret_buf.pointer);
|
2005-11-01 08:20:07 +08:00
|
|
|
return status;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2006-03-04 02:16:05 +08:00
|
|
|
|
|
|
|
|
|
|
|
/* acpi_run_oshp - get control of hotplug from the firmware
|
|
|
|
*
|
|
|
|
* @handle - the handle of the hotplug controller.
|
|
|
|
*/
|
|
|
|
acpi_status acpi_run_oshp(acpi_handle handle)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
acpi_status status;
|
2006-03-17 08:18:39 +08:00
|
|
|
struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
|
|
|
|
|
|
acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* run OSHP */
|
2005-11-01 08:20:07 +08:00
|
|
|
status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL);
|
2006-03-04 02:16:05 +08:00
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
printk(KERN_ERR "%s:%s OSHP fails=0x%x\n", __FUNCTION__,
|
2006-03-17 08:18:39 +08:00
|
|
|
(char *)string.pointer, status);
|
2006-03-04 02:16:05 +08:00
|
|
|
else
|
2006-03-17 08:18:39 +08:00
|
|
|
pr_debug("%s:%s OSHP passes\n", __FUNCTION__,
|
|
|
|
(char *)string.pointer);
|
|
|
|
|
|
|
|
acpi_os_free(string.pointer);
|
2006-03-04 02:16:05 +08:00
|
|
|
return status;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(acpi_run_oshp);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* acpi_get_hp_params_from_firmware
|
|
|
|
*
|
|
|
|
* @dev - the pci_dev of the newly added device
|
|
|
|
* @hpp - allocated by the caller
|
|
|
|
*/
|
|
|
|
acpi_status acpi_get_hp_params_from_firmware(struct pci_dev *dev,
|
|
|
|
struct hotplug_params *hpp)
|
|
|
|
{
|
|
|
|
acpi_status status = AE_NOT_FOUND;
|
|
|
|
struct pci_dev *pdev = dev;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* _HPP settings apply to all child buses, until another _HPP is
|
|
|
|
* encountered. If we don't find an _HPP for the input pci dev,
|
|
|
|
* look for it in the parent device scope since that would apply to
|
|
|
|
* this pci dev. If we don't find any _HPP, use hardcoded defaults
|
|
|
|
*/
|
|
|
|
while (pdev && (ACPI_FAILURE(status))) {
|
|
|
|
acpi_handle handle = DEVICE_ACPI_HANDLE(&(pdev->dev));
|
|
|
|
if (!handle)
|
|
|
|
break;
|
|
|
|
status = acpi_run_hpp(handle, hpp);
|
|
|
|
if (!(pdev->bus->parent))
|
|
|
|
break;
|
|
|
|
/* Check if a parent object supports _HPP */
|
|
|
|
pdev = pdev->bus->parent->self;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2005-11-01 08:20:07 +08:00
|
|
|
return status;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2006-03-04 02:16:05 +08:00
|
|
|
EXPORT_SYMBOL_GPL(acpi_get_hp_params_from_firmware);
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-03-04 02:16:05 +08:00
|
|
|
/* acpi_root_bridge - check to see if this acpi object is a root bridge
|
|
|
|
*
|
|
|
|
* @handle - the acpi object in question.
|
|
|
|
*/
|
|
|
|
int acpi_root_bridge(acpi_handle handle)
|
2005-11-01 08:20:12 +08:00
|
|
|
{
|
|
|
|
acpi_status status;
|
|
|
|
struct acpi_device_info *info;
|
|
|
|
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
|
|
|
|
int i;
|
|
|
|
|
|
|
|
status = acpi_get_object_info(handle, &buffer);
|
|
|
|
if (ACPI_SUCCESS(status)) {
|
|
|
|
info = buffer.pointer;
|
|
|
|
if ((info->valid & ACPI_VALID_HID) &&
|
|
|
|
!strcmp(PCI_ROOT_HID_STRING,
|
|
|
|
info->hardware_id.value)) {
|
|
|
|
acpi_os_free(buffer.pointer);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
if (info->valid & ACPI_VALID_CID) {
|
|
|
|
for (i=0; i < info->compatibility_id.count; i++) {
|
|
|
|
if (!strcmp(PCI_ROOT_HID_STRING,
|
|
|
|
info->compatibility_id.id[i].value)) {
|
|
|
|
acpi_os_free(buffer.pointer);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2006-03-04 02:16:05 +08:00
|
|
|
acpi_os_free(buffer.pointer);
|
2005-11-01 08:20:12 +08:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
2006-03-04 02:16:05 +08:00
|
|
|
EXPORT_SYMBOL_GPL(acpi_root_bridge);
|