patch-2.4.6 linux/drivers/acpi/ospm/processor/pr.c

• Lines: 455
• Date: Wed Jun 20 17:47:40 2001
• Orig file: v2.4.5/linux/drivers/acpi/ospm/processor/pr.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/ospm/processor/pr.c linux/drivers/acpi/ospm/processor/pr.c
@@ -0,0 +1,454 @@
+/*****************************************************************************
+ *
+ * Module Name: pr.c
+ *   $Revision: 30 $
+ *
+ *****************************************************************************/
+
+/*
+ *  Copyright (C) 2000, 2001 Andrew Grover
+ *
+ *  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.  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include <acpi.h>
+#include <bm.h>
+#include "pr.h"
+
+
+#define _COMPONENT		ACPI_PROCESSOR
+	MODULE_NAME		("pr")
+
+
+/****************************************************************************
+ *                                  Globals
+ ****************************************************************************/
+
+extern FADT_DESCRIPTOR_REV2	acpi_fadt;
+
+
+/****************************************************************************
+ *                             Internal Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ *
+ * FUNCTION:    pr_print
+ *
+ * PARAMETERS:
+ *
+ * RETURN:
+ *
+ * DESCRIPTION: Prints out information on a specific thermal zone.
+ *
+ ****************************************************************************/
+
+void
+pr_print (
+	PR_CONTEXT              *processor)
+{
+
+	return;
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:    pr_add_device
+ *
+ * PARAMETERS:  <none>
+ *
+ * RETURN:	
+ *
+ * DESCRIPTION:
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+pr_add_device(
+	BM_HANDLE		device_handle,
+	void			**context)
+{
+	ACPI_STATUS		status = AE_OK;
+	PR_CONTEXT		*processor = NULL;
+	BM_DEVICE		*device = NULL;
+	ACPI_BUFFER		buffer;
+	ACPI_OBJECT		acpi_object;
+	static u32		processor_count = 0;
+
+
+	if (!context || *context) {
+		return(AE_BAD_PARAMETER);
+	}
+
+	status = bm_get_device_info(device_handle, &device);
+	if (ACPI_FAILURE(status)) {
+		return(status);
+	}
+
+	processor = acpi_os_callocate(sizeof(PR_CONTEXT));
+	if (!processor) {
+		return AE_NO_MEMORY;
+	}
+
+	processor->device_handle = device->handle;
+	processor->acpi_handle = device->acpi_handle;
+
+	/*
+	 * Processor Block:
+	 * ----------------
+	 */
+	MEMSET(&acpi_object, 0, sizeof(ACPI_OBJECT));
+
+	buffer.length = sizeof(ACPI_OBJECT);
+	buffer.pointer = &acpi_object;
+
+	status = acpi_evaluate_object(processor->acpi_handle, NULL, NULL, &buffer);
+	if (ACPI_FAILURE(status)) {
+		goto end;
+	}
+
+	/*
+	 * Processor ID:
+	 * -------------
+	 * TBD:  We need to synchronize the processor ID values in ACPI
+	 *       with those of the APIC.  For example, an IBM T20 has a
+	 *       proc_id value of '1', where the Linux value for the
+	 *       first CPU on this system is '0'.  Since x86 CPUs are
+	 *       mapped 1:1 we can simply use a zero-based counter.  Note
+	 *       that this assumes that processor objects are enumerated
+	 *       in the proper order.
+	 */
+	/* processor->uid = acpi_object.processor.proc_id; */
+	processor->uid = processor_count++;
+
+	processor->pblk.length = acpi_object.processor.pblk_length;
+	processor->pblk.address = acpi_object.processor.pblk_address;
+
+	status = pr_power_add_device(processor);
+	if (ACPI_FAILURE(status)) {
+		goto end;
+	}
+
+	status = pr_perf_add_device(processor);
+	if (ACPI_FAILURE(status)) {
+		goto end;
+	}
+
+	status = pr_osl_add_device(processor);
+	if (ACPI_FAILURE(status)) {
+		goto end;
+	}
+
+	*context = processor;
+
+	pr_print(processor);
+
+end:
+	if (ACPI_FAILURE(status)) {
+		acpi_os_free(processor);
+	}
+
+	return(status);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:    pr_remove_device
+ *
+ * PARAMETERS:  <none>
+ *
+ * RETURN:	
+ *
+ * DESCRIPTION:
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+pr_remove_device (
+	void			**context)
+{
+	ACPI_STATUS		status = AE_OK;
+	PR_CONTEXT		*processor= NULL;
+
+	if (!context || !*context) {
+		return(AE_BAD_PARAMETER);
+	}
+
+	processor = (PR_CONTEXT*)(*context);
+
+	pr_osl_remove_device(processor);
+
+	pr_perf_remove_device(processor);
+
+	pr_power_remove_device(processor);
+
+	acpi_os_free(processor);
+
+	return(status);
+}
+
+
+/****************************************************************************
+ *                            External Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ *
+ * FUNCTION:    pr_initialize
+ *
+ * PARAMETERS:  <none>
+ *
+ * RETURN:
+ *
+ * DESCRIPTION:
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+pr_initialize (void)
+{
+	ACPI_STATUS		status = AE_OK;
+	BM_DEVICE_ID		criteria;
+	BM_DRIVER		driver;
+
+	MEMSET(&criteria, 0, sizeof(BM_DEVICE_ID));
+	MEMSET(&driver, 0, sizeof(BM_DRIVER));
+
+	/*
+	 * Initialize power (Cx state) policy.
+	 */
+	status = pr_power_initialize();
+	if (ACPI_FAILURE(status)) {
+		return(status);
+	}
+
+	/*
+	 * Register driver for processor devices.
+	 */
+	criteria.type = BM_TYPE_PROCESSOR;
+
+	driver.notify = &pr_notify;
+	driver.request = &pr_request;
+
+	status = bm_register_driver(&criteria, &driver);
+
+	return(status);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:    pr_terminate
+ *
+ * PARAMETERS:  <none>
+ *
+ * RETURN:
+ *
+ * DESCRIPTION:
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+pr_terminate (void)
+{
+	ACPI_STATUS             status = AE_OK;
+	BM_DEVICE_ID		criteria;
+	BM_DRIVER		driver;
+
+	MEMSET(&criteria, 0, sizeof(BM_DEVICE_ID));
+	MEMSET(&driver, 0, sizeof(BM_DRIVER));
+
+	/*
+	 * Terminate power (Cx state) policy.
+	 */
+	status = pr_power_terminate();
+	if (ACPI_FAILURE(status)) {
+		return(status);
+	}
+
+	/*
+	 * Unegister driver for processor devices.
+	 */
+	criteria.type = BM_TYPE_PROCESSOR;
+
+	driver.notify = &pr_notify;
+	driver.request = &pr_request;
+
+	status = bm_unregister_driver(&criteria, &driver);
+
+	return(status);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:    pr_notify
+ *
+ * PARAMETERS:
+ *
+ * RETURN:
+ *
+ * DESCRIPTION:
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+pr_notify (
+	BM_NOTIFY		notify_type,
+	BM_HANDLE		device_handle,
+	void			**context)
+{
+	ACPI_STATUS		status = AE_OK;
+	PR_CONTEXT		*processor = NULL;
+
+	processor = (PR_CONTEXT*)*context;
+
+	switch (notify_type) {
+
+	case BM_NOTIFY_DEVICE_ADDED:
+		status = pr_add_device(device_handle, context);
+		break;
+
+	case BM_NOTIFY_DEVICE_REMOVED:
+		status = pr_remove_device(context);
+		break;
+
+	case PR_NOTIFY_PERF_STATES:
+		/* TBD: Streamline (this is simple but overkill). */
+		status = pr_perf_remove_device(processor);
+		if (ACPI_SUCCESS(status)) {
+			status = pr_perf_add_device(processor);
+		}
+		if (ACPI_SUCCESS(status)) {
+			status = pr_osl_generate_event(notify_type,
+				(processor));
+		}
+		break;
+
+	case PR_NOTIFY_POWER_STATES:
+		/* TBD: Streamline (this is simple but overkill). */
+		status = pr_power_remove_device(processor);
+		if (ACPI_SUCCESS(status)) {
+			status = pr_power_add_device(processor);
+		}
+		if (ACPI_SUCCESS(status)) {
+			status = pr_osl_generate_event(notify_type,
+				(processor));
+		}
+		break;
+
+	default:
+		status = AE_SUPPORT;
+		break;
+	}
+
+	return(status);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:    pr_request
+ *
+ * PARAMETERS:
+ *
+ * RETURN:
+ *
+ * DESCRIPTION:
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+pr_request (
+	BM_REQUEST		*request,
+	void			*context)
+{
+	ACPI_STATUS		status = AE_OK;
+	PR_CONTEXT		*processor = NULL;
+
+	/*
+	 * Must have a valid request structure and context.
+	 */
+	if (!request || !context) {
+		return(AE_BAD_PARAMETER);
+	}
+
+	processor = (PR_CONTEXT*)context;
+
+	/*
+	 * Handle request:
+	 * ---------------
+	 */
+	switch (request->command) {
+
+	case PR_COMMAND_GET_POWER_INFO:
+		status = bm_copy_to_buffer(&(request->buffer),
+			&(processor->power), sizeof(PR_POWER));
+		break;
+
+	case PR_COMMAND_SET_POWER_INFO:
+	 {
+		PR_POWER *power_info = NULL;
+		u32 i = 0;
+
+		status = bm_cast_buffer(&(request->buffer),
+			(void**)&power_info, sizeof(PR_POWER));
+		if (ACPI_SUCCESS(status)) {
+			for (i=0; i<processor->power.state_count; i++) {
+				MEMCPY(&(processor->power.state[i].promotion),
+					&(power_info->state[i].promotion),
+					sizeof(PR_CX_POLICY_VALUES));
+				MEMCPY(&(processor->power.state[i].demotion),
+					&(power_info->state[i].demotion),
+					sizeof(PR_CX_POLICY_VALUES));
+			}
+		}
+	}
+		break;
+
+	case PR_COMMAND_GET_PERF_INFO:
+		status = bm_copy_to_buffer(&(request->buffer),
+			&(processor->performance), sizeof(PR_PERFORMANCE));
+		break;
+
+	case PR_COMMAND_GET_PERF_STATE:
+		status = bm_copy_to_buffer(&(request->buffer),
+			&(processor->performance.active_state), sizeof(u32));
+		break;
+
+	case PR_COMMAND_SET_PERF_LIMIT:
+	 {
+		u32 *limit = NULL;
+
+		status = bm_cast_buffer(&(request->buffer),
+			(void**)&limit, sizeof(u32));
+		if (ACPI_SUCCESS(status)) {
+			status = pr_perf_set_limit(processor, *limit);
+		}
+	}
+		break;
+
+	default:
+		status = AE_SUPPORT;
+		break;
+	}
+
+	request->status = status;
+
+	return(status);
+}