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pci-acpi: use local buffer for _OSC
Current pci-acpi implementation uses array in osc_data directly to evaluate _OSC. It needs to save the old data and restore it if _OSC evaluation fails. To make it more robust, we should use local array to evaluate _OSC. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Acked-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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8a7a4faf96
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5e0b994745
1 changed files with 39 additions and 34 deletions
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@ -21,12 +21,18 @@
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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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u32 support_set;
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u32 control_set;
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u32 query_result;
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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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struct acpi_osc_args {
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u32 capbuf[3];
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u32 query_result;
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};
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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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@ -47,14 +53,14 @@ static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle)
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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 acpi_run_osc(acpi_handle handle,
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struct acpi_osc_data *osc_data)
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struct acpi_osc_args *osc_args)
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{
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acpi_status status;
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struct acpi_object_list input;
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union acpi_object in_params[4];
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struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
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union acpi_object *out_obj;
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u32 osc_dw0, flags = osc_data->ctrlset_buf[OSC_QUERY_TYPE];
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u32 osc_dw0, flags = osc_args->capbuf[OSC_QUERY_TYPE];
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/* Setting up input parameters */
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input.count = 4;
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@ -68,7 +74,7 @@ static acpi_status acpi_run_osc(acpi_handle handle,
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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 *)osc_data->ctrlset_buf;
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in_params[3].buffer.pointer = (u8 *)osc_args->capbuf;
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status = acpi_evaluate_object(handle, "_OSC", &input, &output);
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if (ACPI_FAILURE(status))
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@ -99,11 +105,9 @@ static acpi_status acpi_run_osc(acpi_handle handle,
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goto out_kfree;
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}
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out_success:
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if (flags & OSC_QUERY_ENABLE) {
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/* Update Global Control Set */
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osc_data->global_ctrlsets =
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if (flags & OSC_QUERY_ENABLE)
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osc_args->query_result =
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*((u32 *)(out_obj->buffer.pointer + 8));
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}
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status = AE_OK;
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out_kfree:
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@ -117,8 +121,9 @@ static acpi_status acpi_query_osc(acpi_handle handle,
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acpi_status status;
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acpi_status *ret_status = (acpi_status *)retval;
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struct acpi_osc_data *osc_data;
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u32 flags = (unsigned long)context, temp;
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u32 flags = (unsigned long)context, support_set;
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acpi_handle tmp;
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struct acpi_osc_args osc_args;
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status = acpi_get_handle(handle, "_OSC", &tmp);
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if (ACPI_FAILURE(status))
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@ -130,21 +135,18 @@ static acpi_status acpi_query_osc(acpi_handle handle,
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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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support_set = osc_data->support_set | (flags & OSC_SUPPORT_MASKS);
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osc_args.capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
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osc_args.capbuf[OSC_SUPPORT_TYPE] = support_set;
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osc_args.capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
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status = acpi_run_osc(handle, osc_data);
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status = acpi_run_osc(handle, &osc_args);
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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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if (ACPI_SUCCESS(status)) {
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osc_data->support_set = support_set;
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osc_data->query_result = osc_args.query_result;
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}
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return status;
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@ -181,10 +183,11 @@ acpi_status __pci_osc_support_set(u32 flags, const char *hid)
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**/
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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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acpi_status status;
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u32 ctrlset, control_set;
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acpi_handle tmp;
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struct acpi_osc_data *osc_data;
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struct acpi_osc_args osc_args;
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status = acpi_get_handle(handle, "_OSC", &tmp);
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if (ACPI_FAILURE(status))
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@ -197,19 +200,21 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
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}
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ctrlset = (flags & OSC_CONTROL_MASKS);
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if (!ctrlset) {
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if (!ctrlset)
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return AE_TYPE;
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}
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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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if (osc_data->support_set &&
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((osc_data->query_result & ctrlset) != ctrlset))
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return AE_SUPPORT;
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}
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osc_data->ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset;
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status = acpi_run_osc(handle, osc_data);
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if (ACPI_FAILURE (status)) {
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osc_data->ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset;
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}
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control_set = osc_data->control_set | ctrlset;
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osc_args.capbuf[OSC_QUERY_TYPE] = 0;
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osc_args.capbuf[OSC_SUPPORT_TYPE] = osc_data->support_set;
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osc_args.capbuf[OSC_CONTROL_TYPE] = control_set;
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status = acpi_run_osc(handle, &osc_args);
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if (ACPI_SUCCESS(status))
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osc_data->control_set = control_set;
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return status;
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}
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EXPORT_SYMBOL(pci_osc_control_set);
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