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ACPI/PCI: handle multiple _OSC 

There is an IA64 system here which have two pci root bridges with _OSC.
One _OSC disables SHPC control bit but the other not. Below patch makes
_OSC data per-device instead of one global, otherwise linux takes both
root bridges don't support SHPC.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Shaohua Li 2008-05-12 10:48:10 +08:00 committed by Jesse Barnes
parent 4a367f3a9d
commit a5d1c87983
1 changed files with 66 additions and 29 deletions
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95
drivers/pci/pci-acpi.c
View File

@ -19,8 +19,31 @@
#include <linux/pci-acpi.h>
#include "pci.h"
static u32 ctrlset_buf[3] = {0, 0, 0};
static u32 global_ctrlsets = 0;
struct acpi_osc_data {
acpi_handle handle;
u32 ctrlset_buf[3];
u32 global_ctrlsets;
struct list_head sibiling;
};
static LIST_HEAD(acpi_osc_data_list);
static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle)
{
struct acpi_osc_data *data;
list_for_each_entry(data, &acpi_osc_data_list, sibiling) {
if (data->handle == handle)
return data;
}
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return NULL;
INIT_LIST_HEAD(&data->sibiling);
data->handle = handle;
list_add_tail(&data->sibiling, &acpi_osc_data_list);
return data;
}
static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
static acpi_status
@ -37,8 +60,21 @@ acpi_query_osc (
union acpi_object *out_obj;
u32 osc_dw0;
acpi_status *ret_status = (acpi_status *)retval;
struct acpi_osc_data *osc_data = acpi_get_osc_data(handle);
u32 flags = (unsigned long)context, temp;
if (!osc_data) {
printk(KERN_ERR "acpi osc data array is full\n");
return AE_ERROR;
}
osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] |= (flags & OSC_SUPPORT_MASKS);
/* do _OSC query for all possible controls */
temp = osc_data->ctrlset_buf[OSC_CONTROL_TYPE];
osc_data->ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
/* Setting up input parameters */
input.count = 4;
input.pointer = in_params;
@ -51,13 +87,11 @@ acpi_query_osc (
in_params[2].integer.value = 3;
in_params[3].type = ACPI_TYPE_BUFFER;
in_params[3].buffer.length = 12;
in_params[3].buffer.pointer = (u8 *)context;
in_params[3].buffer.pointer = (u8 *)osc_data->ctrlset_buf;
status = acpi_evaluate_object(handle, "_OSC", &input, &output);
if (ACPI_FAILURE (status)) {
*ret_status = status;
return status;
}
if (ACPI_FAILURE(status))
goto out_nofree;
out_obj = output.pointer;
if (out_obj->type != ACPI_TYPE_BUFFER) {
@ -76,7 +110,8 @@ acpi_query_osc (
printk(KERN_DEBUG "_OSC invalid revision\n");
if (osc_dw0 & OSC_CAPABILITIES_MASK_ERROR) {
/* Update Global Control Set */
global_ctrlsets = *((u32 *)(out_obj->buffer.pointer+8));
osc_data->global_ctrlsets =
*((u32 *)(out_obj->buffer.pointer + 8));
status = AE_OK;
goto query_osc_out;
}
@ -85,12 +120,21 @@ acpi_query_osc (
}
/* Update Global Control Set */
global_ctrlsets = *((u32 *)(out_obj->buffer.pointer + 8));
osc_data->global_ctrlsets = *((u32 *)(out_obj->buffer.pointer + 8));
status = AE_OK;
query_osc_out:
kfree(output.pointer);
out_nofree:
*ret_status = status;
osc_data->ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE;
osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = temp;
if (ACPI_FAILURE(status)) {
/* no osc support at all */
osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] = 0;
}
return status;
}
@ -165,28 +209,15 @@ acpi_run_osc (
**/
acpi_status __pci_osc_support_set(u32 flags, const char *hid)
{
u32 temp;
acpi_status retval = AE_NOT_FOUND;
if (!(flags & OSC_SUPPORT_MASKS)) {
return AE_TYPE;
}
ctrlset_buf[OSC_SUPPORT_TYPE] |= (flags & OSC_SUPPORT_MASKS);
/* do _OSC query for all possible controls */
temp = ctrlset_buf[OSC_CONTROL_TYPE];
ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
acpi_get_devices(hid,
acpi_query_osc,
ctrlset_buf,
(void *)(unsigned long)flags,
(void **) &retval );
ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE;
ctrlset_buf[OSC_CONTROL_TYPE] = temp;
if (ACPI_FAILURE(retval)) {
/* no osc support at all */
ctrlset_buf[OSC_SUPPORT_TYPE] = 0;
}
return AE_OK;
}
@ -201,19 +232,25 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
{
acpi_status status;
u32 ctrlset;
struct acpi_osc_data *osc_data = acpi_get_osc_data(handle);
if (!osc_data) {
printk(KERN_ERR "acpi osc data array is full\n");
return AE_ERROR;
}
ctrlset = (flags & OSC_CONTROL_MASKS);
if (!ctrlset) {
return AE_TYPE;
}
if (ctrlset_buf[OSC_SUPPORT_TYPE] &&
((global_ctrlsets & ctrlset) != ctrlset)) {
if (osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] &&
((osc_data->global_ctrlsets & ctrlset) != ctrlset)) {
return AE_SUPPORT;
}
ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset;
status = acpi_run_osc(handle, ctrlset_buf);
osc_data->ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset;
status = acpi_run_osc(handle, osc_data->ctrlset_buf);
if (ACPI_FAILURE (status)) {
ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset;
osc_data->ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset;
}
return status;