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>
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4a367f3a9d
Коммит
a5d1c87983
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@ -19,8 +19,31 @@
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#include <linux/pci-acpi.h>
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#include "pci.h"
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static u32 ctrlset_buf[3] = {0, 0, 0};
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static u32 global_ctrlsets = 0;
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struct acpi_osc_data {
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acpi_handle handle;
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u32 ctrlset_buf[3];
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u32 global_ctrlsets;
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struct list_head sibiling;
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};
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static LIST_HEAD(acpi_osc_data_list);
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static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle)
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{
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struct acpi_osc_data *data;
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list_for_each_entry(data, &acpi_osc_data_list, sibiling) {
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if (data->handle == handle)
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return data;
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}
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return NULL;
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INIT_LIST_HEAD(&data->sibiling);
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data->handle = handle;
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list_add_tail(&data->sibiling, &acpi_osc_data_list);
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return data;
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}
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static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
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static acpi_status
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@ -37,8 +60,21 @@ acpi_query_osc (
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union acpi_object *out_obj;
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u32 osc_dw0;
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acpi_status *ret_status = (acpi_status *)retval;
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struct acpi_osc_data *osc_data = acpi_get_osc_data(handle);
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u32 flags = (unsigned long)context, temp;
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if (!osc_data) {
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printk(KERN_ERR "acpi osc data array is full\n");
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return AE_ERROR;
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}
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osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] |= (flags & OSC_SUPPORT_MASKS);
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/* do _OSC query for all possible controls */
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temp = osc_data->ctrlset_buf[OSC_CONTROL_TYPE];
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osc_data->ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
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osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
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/* Setting up input parameters */
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input.count = 4;
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input.pointer = in_params;
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@ -51,13 +87,11 @@ acpi_query_osc (
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in_params[2].integer.value = 3;
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in_params[3].type = ACPI_TYPE_BUFFER;
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in_params[3].buffer.length = 12;
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in_params[3].buffer.pointer = (u8 *)context;
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in_params[3].buffer.pointer = (u8 *)osc_data->ctrlset_buf;
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status = acpi_evaluate_object(handle, "_OSC", &input, &output);
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if (ACPI_FAILURE (status)) {
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*ret_status = status;
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return status;
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}
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if (ACPI_FAILURE(status))
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goto out_nofree;
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out_obj = output.pointer;
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if (out_obj->type != ACPI_TYPE_BUFFER) {
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@ -76,7 +110,8 @@ acpi_query_osc (
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printk(KERN_DEBUG "_OSC invalid revision\n");
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if (osc_dw0 & OSC_CAPABILITIES_MASK_ERROR) {
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/* Update Global Control Set */
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global_ctrlsets = *((u32 *)(out_obj->buffer.pointer+8));
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osc_data->global_ctrlsets =
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*((u32 *)(out_obj->buffer.pointer + 8));
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status = AE_OK;
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goto query_osc_out;
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}
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@ -85,12 +120,21 @@ acpi_query_osc (
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}
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/* Update Global Control Set */
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global_ctrlsets = *((u32 *)(out_obj->buffer.pointer + 8));
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osc_data->global_ctrlsets = *((u32 *)(out_obj->buffer.pointer + 8));
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status = AE_OK;
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query_osc_out:
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kfree(output.pointer);
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out_nofree:
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*ret_status = status;
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osc_data->ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE;
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osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = temp;
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if (ACPI_FAILURE(status)) {
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/* no osc support at all */
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osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] = 0;
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}
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return status;
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}
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@ -165,28 +209,15 @@ run_osc_out:
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**/
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acpi_status __pci_osc_support_set(u32 flags, const char *hid)
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{
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u32 temp;
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acpi_status retval = AE_NOT_FOUND;
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if (!(flags & OSC_SUPPORT_MASKS)) {
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return AE_TYPE;
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}
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ctrlset_buf[OSC_SUPPORT_TYPE] |= (flags & OSC_SUPPORT_MASKS);
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/* do _OSC query for all possible controls */
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temp = ctrlset_buf[OSC_CONTROL_TYPE];
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ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
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ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
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acpi_get_devices(hid,
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acpi_query_osc,
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ctrlset_buf,
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(void *)(unsigned long)flags,
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(void **) &retval );
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ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE;
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ctrlset_buf[OSC_CONTROL_TYPE] = temp;
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if (ACPI_FAILURE(retval)) {
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/* no osc support at all */
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ctrlset_buf[OSC_SUPPORT_TYPE] = 0;
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}
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return AE_OK;
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}
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@ -201,19 +232,25 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
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{
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acpi_status status;
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u32 ctrlset;
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struct acpi_osc_data *osc_data = acpi_get_osc_data(handle);
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if (!osc_data) {
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printk(KERN_ERR "acpi osc data array is full\n");
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return AE_ERROR;
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}
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ctrlset = (flags & OSC_CONTROL_MASKS);
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if (!ctrlset) {
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return AE_TYPE;
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}
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if (ctrlset_buf[OSC_SUPPORT_TYPE] &&
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((global_ctrlsets & ctrlset) != ctrlset)) {
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if (osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] &&
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((osc_data->global_ctrlsets & ctrlset) != ctrlset)) {
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return AE_SUPPORT;
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}
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ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset;
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status = acpi_run_osc(handle, ctrlset_buf);
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osc_data->ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset;
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status = acpi_run_osc(handle, osc_data->ctrlset_buf);
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if (ACPI_FAILURE (status)) {
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ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset;
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osc_data->ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset;
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}
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return status;
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