2009-04-23 18:45:04 +00:00
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2005-04-16 22:20:36 +00:00
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/*
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2006-06-04 23:37:58 +00:00
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* (c) 2003-2006 Advanced Micro Devices, Inc.
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2005-04-16 22:20:36 +00:00
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* Your use of this code is subject to the terms and conditions of the
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* GNU general public license version 2. See "COPYING" or
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* http://www.gnu.org/licenses/gpl.html
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*
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2005-06-01 02:03:46 +00:00
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* Support : mark.langsdorf@amd.com
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2005-04-16 22:20:36 +00:00
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*
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* Based on the powernow-k7.c module written by Dave Jones.
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2008-10-20 17:31:45 +00:00
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* (C) 2003 Dave Jones on behalf of SuSE Labs
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2005-04-16 22:20:36 +00:00
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* (C) 2004 Dominik Brodowski <linux@brodo.de>
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* (C) 2004 Pavel Machek <pavel@suse.cz>
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* Licensed under the terms of the GNU GPL License version 2.
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* Based upon datasheets & sample CPUs kindly provided by AMD.
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*
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* Valuable input gratefully received from Dave Jones, Pavel Machek,
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2006-06-04 23:37:58 +00:00
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* Dominik Brodowski, Jacob Shin, and others.
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2005-06-01 02:03:46 +00:00
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* Originally developed by Paul Devriendt.
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2005-04-16 22:20:36 +00:00
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* Processor information obtained from Chapter 9 (Power and Thermal Management)
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* of the "BIOS and Kernel Developer's Guide for the AMD Athlon 64 and AMD
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* Opteron Processors" available for download from www.amd.com
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*
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2006-05-30 21:25:14 +00:00
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* Tables for specific CPUs can be inferred from
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2005-06-01 02:03:46 +00:00
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* http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/30430.pdf
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2005-04-16 22:20:36 +00:00
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*/
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#include <linux/kernel.h>
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#include <linux/smp.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/cpufreq.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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2005-06-01 02:03:46 +00:00
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#include <linux/cpumask.h>
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2005-10-30 23:03:48 +00:00
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#include <linux/sched.h> /* for current / set_cpus_allowed() */
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2009-02-04 19:37:50 +00:00
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#include <linux/io.h>
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#include <linux/delay.h>
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2005-04-16 22:20:36 +00:00
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#include <asm/msr.h>
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#include <linux/acpi.h>
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2006-03-26 09:37:14 +00:00
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#include <linux/mutex.h>
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2005-04-16 22:20:36 +00:00
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#include <acpi/processor.h>
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#define PFX "powernow-k8: "
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2007-10-17 21:52:08 +00:00
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#define VERSION "version 2.20.00"
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2005-04-16 22:20:36 +00:00
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#include "powernow-k8.h"
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/* serialize freq changes */
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2006-03-26 09:37:14 +00:00
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static DEFINE_MUTEX(fidvid_mutex);
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2005-04-16 22:20:36 +00:00
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2008-01-30 12:33:11 +00:00
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static DEFINE_PER_CPU(struct powernow_k8_data *, powernow_data);
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2005-04-16 22:20:36 +00:00
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2006-06-04 23:37:58 +00:00
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static int cpu_family = CPU_OPTERON;
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2005-06-01 02:03:46 +00:00
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#ifndef CONFIG_SMP
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2009-03-13 04:19:50 +00:00
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static inline const struct cpumask *cpu_core_mask(int cpu)
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{
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return cpumask_of(0);
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}
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2005-06-01 02:03:46 +00:00
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#endif
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2005-04-16 22:20:36 +00:00
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/* Return a frequency in MHz, given an input fid */
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static u32 find_freq_from_fid(u32 fid)
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{
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return 800 + (fid * 100);
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}
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/* Return a frequency in KHz, given an input fid */
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static u32 find_khz_freq_from_fid(u32 fid)
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{
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return 1000 * find_freq_from_fid(fid);
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}
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2009-02-04 19:37:50 +00:00
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static u32 find_khz_freq_from_pstate(struct cpufreq_frequency_table *data,
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u32 pstate)
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2006-06-04 23:37:58 +00:00
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{
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2007-10-17 21:52:08 +00:00
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return data[pstate].frequency;
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2006-06-04 23:37:58 +00:00
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}
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2005-04-16 22:20:36 +00:00
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/* Return the vco fid for an input fid
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*
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* Each "low" fid has corresponding "high" fid, and you can get to "low" fids
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* only from corresponding high fids. This returns "high" fid corresponding to
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* "low" one.
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*/
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static u32 convert_fid_to_vco_fid(u32 fid)
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{
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2006-02-28 05:43:23 +00:00
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if (fid < HI_FID_TABLE_BOTTOM)
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2005-04-16 22:20:36 +00:00
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return 8 + (2 * fid);
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2006-02-28 05:43:23 +00:00
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else
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2005-04-16 22:20:36 +00:00
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return fid;
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}
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/*
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* Return 1 if the pending bit is set. Unless we just instructed the processor
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* to transition to a new state, seeing this bit set is really bad news.
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*/
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static int pending_bit_stuck(void)
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{
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u32 lo, hi;
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2006-06-08 15:30:17 +00:00
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if (cpu_family == CPU_HW_PSTATE)
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2006-06-04 23:37:58 +00:00
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return 0;
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2005-04-16 22:20:36 +00:00
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rdmsr(MSR_FIDVID_STATUS, lo, hi);
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return lo & MSR_S_LO_CHANGE_PENDING ? 1 : 0;
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}
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/*
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* Update the global current fid / vid values from the status msr.
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* Returns 1 on error.
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*/
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static int query_current_values_with_pending_wait(struct powernow_k8_data *data)
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{
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u32 lo, hi;
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u32 i = 0;
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2006-06-08 15:30:17 +00:00
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if (cpu_family == CPU_HW_PSTATE) {
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2009-06-11 15:26:48 +00:00
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rdmsr(MSR_PSTATE_STATUS, lo, hi);
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i = lo & HW_PSTATE_MASK;
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data->currpstate = i;
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/*
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* a workaround for family 11h erratum 311 might cause
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* an "out-of-range Pstate if the core is in Pstate-0
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*/
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if ((boot_cpu_data.x86 == 0x11) && (i >= data->numps))
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data->currpstate = HW_PSTATE_0;
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2006-06-04 23:37:58 +00:00
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return 0;
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}
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2005-07-28 16:45:10 +00:00
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do {
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2005-10-21 21:21:03 +00:00
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if (i++ > 10000) {
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dprintk("detected change pending stuck\n");
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2005-04-16 22:20:36 +00:00
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return 1;
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}
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rdmsr(MSR_FIDVID_STATUS, lo, hi);
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2005-07-28 16:45:10 +00:00
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} while (lo & MSR_S_LO_CHANGE_PENDING);
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2005-04-16 22:20:36 +00:00
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data->currvid = hi & MSR_S_HI_CURRENT_VID;
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data->currfid = lo & MSR_S_LO_CURRENT_FID;
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return 0;
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}
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/* the isochronous relief time */
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static void count_off_irt(struct powernow_k8_data *data)
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{
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udelay((1 << data->irt) * 10);
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return;
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}
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2007-10-19 23:13:56 +00:00
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/* the voltage stabilization time */
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2005-04-16 22:20:36 +00:00
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static void count_off_vst(struct powernow_k8_data *data)
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{
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udelay(data->vstable * VST_UNITS_20US);
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return;
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}
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/* need to init the control msr to a safe value (for each cpu) */
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static void fidvid_msr_init(void)
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{
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u32 lo, hi;
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u8 fid, vid;
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rdmsr(MSR_FIDVID_STATUS, lo, hi);
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vid = hi & MSR_S_HI_CURRENT_VID;
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fid = lo & MSR_S_LO_CURRENT_FID;
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lo = fid | (vid << MSR_C_LO_VID_SHIFT);
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hi = MSR_C_HI_STP_GNT_BENIGN;
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dprintk("cpu%d, init lo 0x%x, hi 0x%x\n", smp_processor_id(), lo, hi);
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wrmsr(MSR_FIDVID_CTL, lo, hi);
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}
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/* write the new fid value along with the other control fields to the msr */
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static int write_new_fid(struct powernow_k8_data *data, u32 fid)
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{
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u32 lo;
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u32 savevid = data->currvid;
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2005-10-21 21:21:03 +00:00
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u32 i = 0;
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2005-04-16 22:20:36 +00:00
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if ((fid & INVALID_FID_MASK) || (data->currvid & INVALID_VID_MASK)) {
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printk(KERN_ERR PFX "internal error - overflow on fid write\n");
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return 1;
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}
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2009-02-04 19:37:50 +00:00
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lo = fid;
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lo |= (data->currvid << MSR_C_LO_VID_SHIFT);
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lo |= MSR_C_LO_INIT_FID_VID;
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2005-04-16 22:20:36 +00:00
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dprintk("writing fid 0x%x, lo 0x%x, hi 0x%x\n",
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fid, lo, data->plllock * PLL_LOCK_CONVERSION);
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2005-10-21 21:21:03 +00:00
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do {
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wrmsr(MSR_FIDVID_CTL, lo, data->plllock * PLL_LOCK_CONVERSION);
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if (i++ > 100) {
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2009-02-04 19:37:50 +00:00
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printk(KERN_ERR PFX
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"Hardware error - pending bit very stuck - "
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"no further pstate changes possible\n");
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2005-10-21 23:56:08 +00:00
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return 1;
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2006-02-28 05:43:23 +00:00
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}
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2005-10-21 21:21:03 +00:00
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} while (query_current_values_with_pending_wait(data));
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2005-04-16 22:20:36 +00:00
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count_off_irt(data);
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if (savevid != data->currvid) {
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2009-02-04 19:37:50 +00:00
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printk(KERN_ERR PFX
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"vid change on fid trans, old 0x%x, new 0x%x\n",
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savevid, data->currvid);
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2005-04-16 22:20:36 +00:00
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return 1;
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}
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if (fid != data->currfid) {
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2009-02-04 19:37:50 +00:00
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printk(KERN_ERR PFX
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"fid trans failed, fid 0x%x, curr 0x%x\n", fid,
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data->currfid);
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2005-04-16 22:20:36 +00:00
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return 1;
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}
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return 0;
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}
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/* Write a new vid to the hardware */
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static int write_new_vid(struct powernow_k8_data *data, u32 vid)
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{
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u32 lo;
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u32 savefid = data->currfid;
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2005-10-21 21:21:03 +00:00
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int i = 0;
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2005-04-16 22:20:36 +00:00
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if ((data->currfid & INVALID_FID_MASK) || (vid & INVALID_VID_MASK)) {
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printk(KERN_ERR PFX "internal error - overflow on vid write\n");
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return 1;
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}
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2009-02-04 19:37:50 +00:00
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lo = data->currfid;
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lo |= (vid << MSR_C_LO_VID_SHIFT);
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lo |= MSR_C_LO_INIT_FID_VID;
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2005-04-16 22:20:36 +00:00
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dprintk("writing vid 0x%x, lo 0x%x, hi 0x%x\n",
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vid, lo, STOP_GRANT_5NS);
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2005-10-21 21:21:03 +00:00
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do {
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wrmsr(MSR_FIDVID_CTL, lo, STOP_GRANT_5NS);
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2005-11-30 21:33:30 +00:00
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if (i++ > 100) {
|
2009-02-04 19:37:50 +00:00
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printk(KERN_ERR PFX "internal error - pending bit "
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"very stuck - no further pstate "
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"changes possible\n");
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2005-11-30 21:33:30 +00:00
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return 1;
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}
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2005-10-21 21:21:03 +00:00
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} while (query_current_values_with_pending_wait(data));
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2005-04-16 22:20:36 +00:00
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if (savefid != data->currfid) {
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2009-02-04 19:37:50 +00:00
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printk(KERN_ERR PFX "fid changed on vid trans, old "
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"0x%x new 0x%x\n",
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2005-04-16 22:20:36 +00:00
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savefid, data->currfid);
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return 1;
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}
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if (vid != data->currvid) {
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2009-02-04 19:37:50 +00:00
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printk(KERN_ERR PFX "vid trans failed, vid 0x%x, "
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"curr 0x%x\n",
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vid, data->currvid);
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2005-04-16 22:20:36 +00:00
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return 1;
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}
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return 0;
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}
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/*
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|
|
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* Reduce the vid by the max of step or reqvid.
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|
* Decreasing vid codes represent increasing voltages:
|
2005-07-28 16:40:04 +00:00
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|
* vid of 0 is 1.550V, vid of 0x1e is 0.800V, vid of VID_OFF is off.
|
2005-04-16 22:20:36 +00:00
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*/
|
2009-02-04 19:37:50 +00:00
|
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static int decrease_vid_code_by_step(struct powernow_k8_data *data,
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u32 reqvid, u32 step)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
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if ((data->currvid - reqvid) > step)
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reqvid = data->currvid - step;
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if (write_new_vid(data, reqvid))
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return 1;
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|
count_off_vst(data);
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return 0;
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|
|
}
|
|
|
|
|
2006-06-04 23:37:58 +00:00
|
|
|
/* Change hardware pstate by single MSR write */
|
|
|
|
static int transition_pstate(struct powernow_k8_data *data, u32 pstate)
|
|
|
|
{
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|
|
|
wrmsr(MSR_PSTATE_CTRL, pstate, 0);
|
2007-10-17 21:52:08 +00:00
|
|
|
data->currpstate = pstate;
|
2006-06-04 23:37:58 +00:00
|
|
|
return 0;
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|
|
|
}
|
|
|
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|
|
/* Change Opteron/Athlon64 fid and vid, by the 3 phases. */
|
2009-02-04 19:37:50 +00:00
|
|
|
static int transition_fid_vid(struct powernow_k8_data *data,
|
|
|
|
u32 reqfid, u32 reqvid)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2009-07-26 15:55:25 +00:00
|
|
|
if (core_voltage_pre_transition(data, reqvid, reqfid))
|
2005-04-16 22:20:36 +00:00
|
|
|
return 1;
|
|
|
|
|
|
|
|
if (core_frequency_transition(data, reqfid))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if (core_voltage_post_transition(data, reqvid))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if (query_current_values_with_pending_wait(data))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if ((reqfid != data->currfid) || (reqvid != data->currvid)) {
|
2009-02-04 19:37:50 +00:00
|
|
|
printk(KERN_ERR PFX "failed (cpu%d): req 0x%x 0x%x, "
|
|
|
|
"curr 0x%x 0x%x\n",
|
2005-04-16 22:20:36 +00:00
|
|
|
smp_processor_id(),
|
|
|
|
reqfid, reqvid, data->currfid, data->currvid);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
dprintk("transitioned (cpu%d): new fid 0x%x, vid 0x%x\n",
|
|
|
|
smp_processor_id(), data->currfid, data->currvid);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Phase 1 - core voltage transition ... setup voltage */
|
2009-02-04 19:37:50 +00:00
|
|
|
static int core_voltage_pre_transition(struct powernow_k8_data *data,
|
2009-07-26 15:55:25 +00:00
|
|
|
u32 reqvid, u32 reqfid)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
u32 rvosteps = data->rvo;
|
|
|
|
u32 savefid = data->currfid;
|
2009-07-26 15:55:25 +00:00
|
|
|
u32 maxvid, lo, rvomult = 1;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
dprintk("ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, "
|
|
|
|
"reqvid 0x%x, rvo 0x%x\n",
|
2005-04-16 22:20:36 +00:00
|
|
|
smp_processor_id(),
|
|
|
|
data->currfid, data->currvid, reqvid, data->rvo);
|
|
|
|
|
2009-07-26 15:55:25 +00:00
|
|
|
if ((savefid < LO_FID_TABLE_TOP) && (reqfid < LO_FID_TABLE_TOP))
|
|
|
|
rvomult = 2;
|
|
|
|
rvosteps *= rvomult;
|
2005-06-01 02:03:46 +00:00
|
|
|
rdmsr(MSR_FIDVID_STATUS, lo, maxvid);
|
|
|
|
maxvid = 0x1f & (maxvid >> 16);
|
|
|
|
dprintk("ph1 maxvid=0x%x\n", maxvid);
|
|
|
|
if (reqvid < maxvid) /* lower numbers are higher voltages */
|
|
|
|
reqvid = maxvid;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
while (data->currvid > reqvid) {
|
|
|
|
dprintk("ph1: curr 0x%x, req vid 0x%x\n",
|
|
|
|
data->currvid, reqvid);
|
|
|
|
if (decrease_vid_code_by_step(data, reqvid, data->vidmvs))
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2009-07-26 15:55:25 +00:00
|
|
|
while ((rvosteps > 0) &&
|
|
|
|
((rvomult * data->rvo + data->currvid) > reqvid)) {
|
2005-06-01 02:03:46 +00:00
|
|
|
if (data->currvid == maxvid) {
|
2005-04-16 22:20:36 +00:00
|
|
|
rvosteps = 0;
|
|
|
|
} else {
|
|
|
|
dprintk("ph1: changing vid for rvo, req 0x%x\n",
|
|
|
|
data->currvid - 1);
|
2009-02-04 19:37:50 +00:00
|
|
|
if (decrease_vid_code_by_step(data, data->currvid-1, 1))
|
2005-04-16 22:20:36 +00:00
|
|
|
return 1;
|
|
|
|
rvosteps--;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (query_current_values_with_pending_wait(data))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if (savefid != data->currfid) {
|
2009-02-04 19:37:50 +00:00
|
|
|
printk(KERN_ERR PFX "ph1 err, currfid changed 0x%x\n",
|
|
|
|
data->currfid);
|
2005-04-16 22:20:36 +00:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
dprintk("ph1 complete, currfid 0x%x, currvid 0x%x\n",
|
|
|
|
data->currfid, data->currvid);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Phase 2 - core frequency transition */
|
|
|
|
static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid)
|
|
|
|
{
|
2009-02-04 19:37:50 +00:00
|
|
|
u32 vcoreqfid, vcocurrfid, vcofiddiff;
|
|
|
|
u32 fid_interval, savevid = data->currvid;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
if (data->currfid == reqfid) {
|
2009-02-04 19:37:50 +00:00
|
|
|
printk(KERN_ERR PFX "ph2 null fid transition 0x%x\n",
|
|
|
|
data->currfid);
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
dprintk("ph2 (cpu%d): starting, currfid 0x%x, currvid 0x%x, "
|
|
|
|
"reqfid 0x%x\n",
|
2005-04-16 22:20:36 +00:00
|
|
|
smp_processor_id(),
|
|
|
|
data->currfid, data->currvid, reqfid);
|
|
|
|
|
|
|
|
vcoreqfid = convert_fid_to_vco_fid(reqfid);
|
|
|
|
vcocurrfid = convert_fid_to_vco_fid(data->currfid);
|
|
|
|
vcofiddiff = vcocurrfid > vcoreqfid ? vcocurrfid - vcoreqfid
|
|
|
|
: vcoreqfid - vcocurrfid;
|
|
|
|
|
2009-07-26 15:55:25 +00:00
|
|
|
if ((reqfid <= LO_FID_TABLE_TOP) && (data->currfid <= LO_FID_TABLE_TOP))
|
|
|
|
vcofiddiff = 0;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
while (vcofiddiff > 2) {
|
2005-11-29 20:18:03 +00:00
|
|
|
(data->currfid & 1) ? (fid_interval = 1) : (fid_interval = 2);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
if (reqfid > data->currfid) {
|
|
|
|
if (data->currfid > LO_FID_TABLE_TOP) {
|
2009-02-04 19:37:50 +00:00
|
|
|
if (write_new_fid(data,
|
|
|
|
data->currfid + fid_interval))
|
2005-04-16 22:20:36 +00:00
|
|
|
return 1;
|
|
|
|
} else {
|
|
|
|
if (write_new_fid
|
2009-02-04 19:37:50 +00:00
|
|
|
(data,
|
|
|
|
2 + convert_fid_to_vco_fid(data->currfid)))
|
2005-04-16 22:20:36 +00:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
} else {
|
2005-11-29 20:18:03 +00:00
|
|
|
if (write_new_fid(data, data->currfid - fid_interval))
|
2005-04-16 22:20:36 +00:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
vcocurrfid = convert_fid_to_vco_fid(data->currfid);
|
|
|
|
vcofiddiff = vcocurrfid > vcoreqfid ? vcocurrfid - vcoreqfid
|
|
|
|
: vcoreqfid - vcocurrfid;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (write_new_fid(data, reqfid))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if (query_current_values_with_pending_wait(data))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if (data->currfid != reqfid) {
|
|
|
|
printk(KERN_ERR PFX
|
2009-02-04 19:37:50 +00:00
|
|
|
"ph2: mismatch, failed fid transition, "
|
|
|
|
"curr 0x%x, req 0x%x\n",
|
2005-04-16 22:20:36 +00:00
|
|
|
data->currfid, reqfid);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (savevid != data->currvid) {
|
|
|
|
printk(KERN_ERR PFX "ph2: vid changed, save 0x%x, curr 0x%x\n",
|
|
|
|
savevid, data->currvid);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
dprintk("ph2 complete, currfid 0x%x, currvid 0x%x\n",
|
|
|
|
data->currfid, data->currvid);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Phase 3 - core voltage transition flow ... jump to the final vid. */
|
2009-02-04 19:37:50 +00:00
|
|
|
static int core_voltage_post_transition(struct powernow_k8_data *data,
|
|
|
|
u32 reqvid)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
u32 savefid = data->currfid;
|
|
|
|
u32 savereqvid = reqvid;
|
|
|
|
|
|
|
|
dprintk("ph3 (cpu%d): starting, currfid 0x%x, currvid 0x%x\n",
|
|
|
|
smp_processor_id(),
|
|
|
|
data->currfid, data->currvid);
|
|
|
|
|
|
|
|
if (reqvid != data->currvid) {
|
|
|
|
if (write_new_vid(data, reqvid))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if (savefid != data->currfid) {
|
|
|
|
printk(KERN_ERR PFX
|
|
|
|
"ph3: bad fid change, save 0x%x, curr 0x%x\n",
|
|
|
|
savefid, data->currfid);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (data->currvid != reqvid) {
|
|
|
|
printk(KERN_ERR PFX
|
2009-02-04 19:37:50 +00:00
|
|
|
"ph3: failed vid transition\n, "
|
|
|
|
"req 0x%x, curr 0x%x",
|
2005-04-16 22:20:36 +00:00
|
|
|
reqvid, data->currvid);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (query_current_values_with_pending_wait(data))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if (savereqvid != data->currvid) {
|
|
|
|
dprintk("ph3 failed, currvid 0x%x\n", data->currvid);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (savefid != data->currfid) {
|
|
|
|
dprintk("ph3 failed, currfid changed 0x%x\n",
|
|
|
|
data->currfid);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
dprintk("ph3 complete, currfid 0x%x, currvid 0x%x\n",
|
|
|
|
data->currfid, data->currvid);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-06-12 11:25:37 +00:00
|
|
|
static void check_supported_cpu(void *_rc)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
u32 eax, ebx, ecx, edx;
|
2009-06-12 11:25:37 +00:00
|
|
|
int *rc = _rc;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-06-12 11:25:37 +00:00
|
|
|
*rc = -ENODEV;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
if (current_cpu_data.x86_vendor != X86_VENDOR_AMD)
|
2009-06-12 11:25:37 +00:00
|
|
|
return;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
|
2006-06-04 23:37:58 +00:00
|
|
|
if (((eax & CPUID_XFAM) != CPUID_XFAM_K8) &&
|
|
|
|
((eax & CPUID_XFAM) < CPUID_XFAM_10H))
|
2009-06-12 11:25:37 +00:00
|
|
|
return;
|
2006-02-28 05:36:32 +00:00
|
|
|
|
2006-06-04 23:37:58 +00:00
|
|
|
if ((eax & CPUID_XFAM) == CPUID_XFAM_K8) {
|
|
|
|
if (((eax & CPUID_USE_XFAM_XMOD) != CPUID_USE_XFAM_XMOD) ||
|
2007-05-14 22:27:29 +00:00
|
|
|
((eax & CPUID_XMOD) > CPUID_XMOD_REV_MASK)) {
|
2009-02-04 19:37:50 +00:00
|
|
|
printk(KERN_INFO PFX
|
|
|
|
"Processor cpuid %x not supported\n", eax);
|
2009-06-12 11:25:37 +00:00
|
|
|
return;
|
2006-06-04 23:37:58 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-06-04 23:37:58 +00:00
|
|
|
eax = cpuid_eax(CPUID_GET_MAX_CAPABILITIES);
|
|
|
|
if (eax < CPUID_FREQ_VOLT_CAPABILITIES) {
|
|
|
|
printk(KERN_INFO PFX
|
|
|
|
"No frequency change capabilities detected\n");
|
2009-06-12 11:25:37 +00:00
|
|
|
return;
|
2006-06-04 23:37:58 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-06-04 23:37:58 +00:00
|
|
|
cpuid(CPUID_FREQ_VOLT_CAPABILITIES, &eax, &ebx, &ecx, &edx);
|
2009-02-04 19:37:50 +00:00
|
|
|
if ((edx & P_STATE_TRANSITION_CAPABLE)
|
|
|
|
!= P_STATE_TRANSITION_CAPABLE) {
|
|
|
|
printk(KERN_INFO PFX
|
|
|
|
"Power state transitions not supported\n");
|
2009-06-12 11:25:37 +00:00
|
|
|
return;
|
2006-06-04 23:37:58 +00:00
|
|
|
}
|
|
|
|
} else { /* must be a HW Pstate capable processor */
|
|
|
|
cpuid(CPUID_FREQ_VOLT_CAPABILITIES, &eax, &ebx, &ecx, &edx);
|
|
|
|
if ((edx & USE_HW_PSTATE) == USE_HW_PSTATE)
|
|
|
|
cpu_family = CPU_HW_PSTATE;
|
|
|
|
else
|
2009-06-12 11:25:37 +00:00
|
|
|
return;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2009-06-12 11:25:37 +00:00
|
|
|
*rc = 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
static int check_pst_table(struct powernow_k8_data *data, struct pst_s *pst,
|
|
|
|
u8 maxvid)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
unsigned int j;
|
|
|
|
u8 lastfid = 0xff;
|
|
|
|
|
|
|
|
for (j = 0; j < data->numps; j++) {
|
|
|
|
if (pst[j].vid > LEAST_VID) {
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "vid %d invalid : 0x%x\n",
|
|
|
|
j, pst[j].vid);
|
2005-04-16 22:20:36 +00:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
2009-02-04 19:37:50 +00:00
|
|
|
if (pst[j].vid < data->rvo) {
|
|
|
|
/* vid + rvo >= 0 */
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "0 vid exceeded with pstate"
|
|
|
|
" %d\n", j);
|
2005-04-16 22:20:36 +00:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
2009-02-04 19:37:50 +00:00
|
|
|
if (pst[j].vid < maxvid + data->rvo) {
|
|
|
|
/* vid + rvo >= maxvid */
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "maxvid exceeded with pstate"
|
|
|
|
" %d\n", j);
|
2005-04-16 22:20:36 +00:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
2005-11-21 15:23:08 +00:00
|
|
|
if (pst[j].fid > MAX_FID) {
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "maxfid exceeded with pstate"
|
|
|
|
" %d\n", j);
|
2005-11-21 15:23:08 +00:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
if (j && (pst[j].fid < HI_FID_TABLE_BOTTOM)) {
|
2005-04-16 22:20:36 +00:00
|
|
|
/* Only first fid is allowed to be in "low" range */
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "two low fids - %d : "
|
|
|
|
"0x%x\n", j, pst[j].fid);
|
2005-04-16 22:20:36 +00:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
if (pst[j].fid < lastfid)
|
|
|
|
lastfid = pst[j].fid;
|
|
|
|
}
|
|
|
|
if (lastfid & 1) {
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "lastfid invalid\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
if (lastfid > LO_FID_TABLE_TOP)
|
2009-02-04 19:37:50 +00:00
|
|
|
printk(KERN_INFO FW_BUG PFX
|
|
|
|
"first fid not from lo freq table\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
static void invalidate_entry(struct powernow_k8_data *data, unsigned int entry)
|
|
|
|
{
|
|
|
|
data->powernow_table[entry].frequency = CPUFREQ_ENTRY_INVALID;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
static void print_basics(struct powernow_k8_data *data)
|
|
|
|
{
|
|
|
|
int j;
|
|
|
|
for (j = 0; j < data->numps; j++) {
|
2009-02-04 19:37:50 +00:00
|
|
|
if (data->powernow_table[j].frequency !=
|
|
|
|
CPUFREQ_ENTRY_INVALID) {
|
2006-06-08 15:30:17 +00:00
|
|
|
if (cpu_family == CPU_HW_PSTATE) {
|
2009-02-04 19:37:50 +00:00
|
|
|
printk(KERN_INFO PFX
|
|
|
|
" %d : pstate %d (%d MHz)\n", j,
|
2007-11-21 03:38:27 +00:00
|
|
|
data->powernow_table[j].index,
|
2007-07-13 05:34:10 +00:00
|
|
|
data->powernow_table[j].frequency/1000);
|
2006-06-04 23:37:58 +00:00
|
|
|
} else {
|
2009-02-04 19:37:50 +00:00
|
|
|
printk(KERN_INFO PFX
|
|
|
|
" %d : fid 0x%x (%d MHz), vid 0x%x\n",
|
2007-07-13 05:34:10 +00:00
|
|
|
j,
|
|
|
|
data->powernow_table[j].index & 0xff,
|
|
|
|
data->powernow_table[j].frequency/1000,
|
|
|
|
data->powernow_table[j].index >> 8);
|
2006-06-04 23:37:58 +00:00
|
|
|
}
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
if (data->batps)
|
2009-02-04 19:37:50 +00:00
|
|
|
printk(KERN_INFO PFX "Only %d pstates on battery\n",
|
|
|
|
data->batps);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2009-04-22 11:48:33 +00:00
|
|
|
static u32 freq_from_fid_did(u32 fid, u32 did)
|
|
|
|
{
|
|
|
|
u32 mhz = 0;
|
|
|
|
|
|
|
|
if (boot_cpu_data.x86 == 0x10)
|
|
|
|
mhz = (100 * (fid + 0x10)) >> did;
|
|
|
|
else if (boot_cpu_data.x86 == 0x11)
|
|
|
|
mhz = (100 * (fid + 8)) >> did;
|
|
|
|
else
|
|
|
|
BUG();
|
|
|
|
|
|
|
|
return mhz * 1000;
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
static int fill_powernow_table(struct powernow_k8_data *data,
|
|
|
|
struct pst_s *pst, u8 maxvid)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct cpufreq_frequency_table *powernow_table;
|
|
|
|
unsigned int j;
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
if (data->batps) {
|
|
|
|
/* use ACPI support to get full speed on mains power */
|
|
|
|
printk(KERN_WARNING PFX
|
|
|
|
"Only %d pstates usable (use ACPI driver for full "
|
|
|
|
"range\n", data->batps);
|
2005-04-16 22:20:36 +00:00
|
|
|
data->numps = data->batps;
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
for (j = 1; j < data->numps; j++) {
|
2005-04-16 22:20:36 +00:00
|
|
|
if (pst[j-1].fid >= pst[j].fid) {
|
|
|
|
printk(KERN_ERR PFX "PST out of sequence\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (data->numps < 2) {
|
|
|
|
printk(KERN_ERR PFX "no p states to transition\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (check_pst_table(data, pst, maxvid))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table)
|
|
|
|
* (data->numps + 1)), GFP_KERNEL);
|
|
|
|
if (!powernow_table) {
|
|
|
|
printk(KERN_ERR PFX "powernow_table memory alloc failure\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (j = 0; j < data->numps; j++) {
|
2009-02-04 19:37:50 +00:00
|
|
|
int freq;
|
2005-04-16 22:20:36 +00:00
|
|
|
powernow_table[j].index = pst[j].fid; /* lower 8 bits */
|
|
|
|
powernow_table[j].index |= (pst[j].vid << 8); /* upper 8 bits */
|
2009-02-04 19:37:50 +00:00
|
|
|
freq = find_khz_freq_from_fid(pst[j].fid);
|
|
|
|
powernow_table[j].frequency = freq;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
powernow_table[data->numps].frequency = CPUFREQ_TABLE_END;
|
|
|
|
powernow_table[data->numps].index = 0;
|
|
|
|
|
|
|
|
if (query_current_values_with_pending_wait(data)) {
|
|
|
|
kfree(powernow_table);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
dprintk("cfid 0x%x, cvid 0x%x\n", data->currfid, data->currvid);
|
|
|
|
data->powernow_table = powernow_table;
|
2009-03-13 04:19:50 +00:00
|
|
|
if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)
|
2007-04-30 19:15:05 +00:00
|
|
|
print_basics(data);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
for (j = 0; j < data->numps; j++)
|
2009-02-04 19:37:50 +00:00
|
|
|
if ((pst[j].fid == data->currfid) &&
|
|
|
|
(pst[j].vid == data->currvid))
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
dprintk("currfid/vid do not match PST, ignoring\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Find and validate the PSB/PST table in BIOS. */
|
|
|
|
static int find_psb_table(struct powernow_k8_data *data)
|
|
|
|
{
|
|
|
|
struct psb_s *psb;
|
|
|
|
unsigned int i;
|
|
|
|
u32 mvs;
|
|
|
|
u8 maxvid;
|
|
|
|
u32 cpst = 0;
|
|
|
|
u32 thiscpuid;
|
|
|
|
|
|
|
|
for (i = 0xc0000; i < 0xffff0; i += 0x10) {
|
|
|
|
/* Scan BIOS looking for the signature. */
|
|
|
|
/* It can not be at ffff0 - it is too big. */
|
|
|
|
|
|
|
|
psb = phys_to_virt(i);
|
|
|
|
if (memcmp(psb, PSB_ID_STRING, PSB_ID_STRING_LEN) != 0)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
dprintk("found PSB header at 0x%p\n", psb);
|
|
|
|
|
|
|
|
dprintk("table vers: 0x%x\n", psb->tableversion);
|
|
|
|
if (psb->tableversion != PSB_VERSION_1_4) {
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "PSB table is not v1.4\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
dprintk("flags: 0x%x\n", psb->flags1);
|
|
|
|
if (psb->flags1) {
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "unknown flags\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
data->vstable = psb->vstable;
|
2009-02-04 19:37:50 +00:00
|
|
|
dprintk("voltage stabilization time: %d(*20us)\n",
|
|
|
|
data->vstable);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
dprintk("flags2: 0x%x\n", psb->flags2);
|
|
|
|
data->rvo = psb->flags2 & 3;
|
|
|
|
data->irt = ((psb->flags2) >> 2) & 3;
|
|
|
|
mvs = ((psb->flags2) >> 4) & 3;
|
|
|
|
data->vidmvs = 1 << mvs;
|
|
|
|
data->batps = ((psb->flags2) >> 6) & 3;
|
|
|
|
|
|
|
|
dprintk("ramp voltage offset: %d\n", data->rvo);
|
|
|
|
dprintk("isochronous relief time: %d\n", data->irt);
|
|
|
|
dprintk("maximum voltage step: %d - 0x%x\n", mvs, data->vidmvs);
|
|
|
|
|
|
|
|
dprintk("numpst: 0x%x\n", psb->num_tables);
|
|
|
|
cpst = psb->num_tables;
|
2009-02-04 19:37:50 +00:00
|
|
|
if ((psb->cpuid == 0x00000fc0) ||
|
|
|
|
(psb->cpuid == 0x00000fe0)) {
|
2005-04-16 22:20:36 +00:00
|
|
|
thiscpuid = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
|
2009-02-04 19:37:50 +00:00
|
|
|
if ((thiscpuid == 0x00000fc0) ||
|
|
|
|
(thiscpuid == 0x00000fe0))
|
2005-04-16 22:20:36 +00:00
|
|
|
cpst = 1;
|
|
|
|
}
|
|
|
|
if (cpst != 1) {
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "numpst must be 1\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
data->plllock = psb->plllocktime;
|
|
|
|
dprintk("plllocktime: 0x%x (units 1us)\n", psb->plllocktime);
|
|
|
|
dprintk("maxfid: 0x%x\n", psb->maxfid);
|
|
|
|
dprintk("maxvid: 0x%x\n", psb->maxvid);
|
|
|
|
maxvid = psb->maxvid;
|
|
|
|
|
|
|
|
data->numps = psb->numps;
|
|
|
|
dprintk("numpstates: 0x%x\n", data->numps);
|
2009-02-04 19:37:50 +00:00
|
|
|
return fill_powernow_table(data,
|
|
|
|
(struct pst_s *)(psb+1), maxvid);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
/*
|
|
|
|
* If you see this message, complain to BIOS manufacturer. If
|
|
|
|
* he tells you "we do not support Linux" or some similar
|
|
|
|
* nonsense, remember that Windows 2000 uses the same legacy
|
|
|
|
* mechanism that the old Linux PSB driver uses. Tell them it
|
|
|
|
* is broken with Windows 2000.
|
|
|
|
*
|
|
|
|
* The reference to the AMD documentation is chapter 9 in the
|
|
|
|
* BIOS and Kernel Developer's Guide, which is available on
|
|
|
|
* www.amd.com
|
|
|
|
*/
|
2009-02-04 10:56:11 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "No PSB or ACPI _PSS objects\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data,
|
|
|
|
unsigned int index)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2009-02-04 19:37:50 +00:00
|
|
|
acpi_integer control;
|
|
|
|
|
2008-08-19 20:34:59 +00:00
|
|
|
if (!data->acpi_data.state_count || (cpu_family == CPU_HW_PSTATE))
|
2005-04-16 22:20:36 +00:00
|
|
|
return;
|
|
|
|
|
2009-04-23 18:45:04 +00:00
|
|
|
control = data->acpi_data.states[index].control;
|
|
|
|
data->irt = (control >> IRT_SHIFT) & IRT_MASK;
|
|
|
|
data->rvo = (control >> RVO_SHIFT) & RVO_MASK;
|
|
|
|
data->exttype = (control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK;
|
|
|
|
data->plllock = (control >> PLL_L_SHIFT) & PLL_L_MASK;
|
|
|
|
data->vidmvs = 1 << ((control >> MVS_SHIFT) & MVS_MASK);
|
|
|
|
data->vstable = (control >> VST_SHIFT) & VST_MASK;
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
|
|
|
|
{
|
|
|
|
struct cpufreq_frequency_table *powernow_table;
|
2009-01-01 02:08:47 +00:00
|
|
|
int ret_val = -ENODEV;
|
2009-06-05 16:37:07 +00:00
|
|
|
acpi_integer control, status;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-08-19 20:34:59 +00:00
|
|
|
if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) {
|
2005-06-01 02:03:46 +00:00
|
|
|
dprintk("register performance failed: bad ACPI data\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* verify the data contained in the ACPI structures */
|
2008-08-19 20:34:59 +00:00
|
|
|
if (data->acpi_data.state_count <= 1) {
|
2005-04-16 22:20:36 +00:00
|
|
|
dprintk("No ACPI P-States\n");
|
|
|
|
goto err_out;
|
|
|
|
}
|
|
|
|
|
2009-06-05 16:37:07 +00:00
|
|
|
control = data->acpi_data.control_register.space_id;
|
|
|
|
status = data->acpi_data.status_register.space_id;
|
|
|
|
|
|
|
|
if ((control != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
|
|
|
|
(status != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
|
2005-04-16 22:20:36 +00:00
|
|
|
dprintk("Invalid control/status registers (%x - %x)\n",
|
2009-06-05 16:37:07 +00:00
|
|
|
control, status);
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* fill in data->powernow_table */
|
|
|
|
powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table)
|
2008-08-19 20:34:59 +00:00
|
|
|
* (data->acpi_data.state_count + 1)), GFP_KERNEL);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!powernow_table) {
|
|
|
|
dprintk("powernow_table memory alloc failure\n");
|
|
|
|
goto err_out;
|
|
|
|
}
|
|
|
|
|
2006-06-08 15:30:17 +00:00
|
|
|
if (cpu_family == CPU_HW_PSTATE)
|
2006-06-04 23:37:58 +00:00
|
|
|
ret_val = fill_powernow_table_pstate(data, powernow_table);
|
|
|
|
else
|
|
|
|
ret_val = fill_powernow_table_fidvid(data, powernow_table);
|
|
|
|
if (ret_val)
|
|
|
|
goto err_out_mem;
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
powernow_table[data->acpi_data.state_count].frequency =
|
|
|
|
CPUFREQ_TABLE_END;
|
2008-08-19 20:34:59 +00:00
|
|
|
powernow_table[data->acpi_data.state_count].index = 0;
|
2006-06-04 23:37:58 +00:00
|
|
|
data->powernow_table = powernow_table;
|
|
|
|
|
|
|
|
/* fill in data */
|
2008-08-19 20:34:59 +00:00
|
|
|
data->numps = data->acpi_data.state_count;
|
2009-03-13 04:19:50 +00:00
|
|
|
if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)
|
2007-04-30 19:15:05 +00:00
|
|
|
print_basics(data);
|
2006-06-04 23:37:58 +00:00
|
|
|
powernow_k8_acpi_pst_values(data, 0);
|
|
|
|
|
|
|
|
/* notify BIOS that we exist */
|
|
|
|
acpi_processor_notify_smm(THIS_MODULE);
|
|
|
|
|
2009-06-06 21:51:36 +00:00
|
|
|
if (!zalloc_cpumask_var(&data->acpi_data.shared_cpu_map, GFP_KERNEL)) {
|
2009-01-01 02:08:47 +00:00
|
|
|
printk(KERN_ERR PFX
|
|
|
|
"unable to alloc powernow_k8_data cpumask\n");
|
|
|
|
ret_val = -ENOMEM;
|
|
|
|
goto err_out_mem;
|
|
|
|
}
|
|
|
|
|
2006-06-04 23:37:58 +00:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_out_mem:
|
|
|
|
kfree(powernow_table);
|
|
|
|
|
|
|
|
err_out:
|
2008-08-19 20:34:59 +00:00
|
|
|
acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
|
2006-06-04 23:37:58 +00:00
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
/* data->acpi_data.state_count informs us at ->exit()
|
|
|
|
* whether ACPI was used */
|
2008-08-19 20:34:59 +00:00
|
|
|
data->acpi_data.state_count = 0;
|
2006-06-04 23:37:58 +00:00
|
|
|
|
2009-01-01 02:08:47 +00:00
|
|
|
return ret_val;
|
2006-06-04 23:37:58 +00:00
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
static int fill_powernow_table_pstate(struct powernow_k8_data *data,
|
|
|
|
struct cpufreq_frequency_table *powernow_table)
|
2006-06-04 23:37:58 +00:00
|
|
|
{
|
|
|
|
int i;
|
2007-10-17 21:52:08 +00:00
|
|
|
u32 hi = 0, lo = 0;
|
|
|
|
rdmsr(MSR_PSTATE_CUR_LIMIT, hi, lo);
|
|
|
|
data->max_hw_pstate = (hi & HW_PSTATE_MAX_MASK) >> HW_PSTATE_MAX_SHIFT;
|
2006-06-04 23:37:58 +00:00
|
|
|
|
2008-08-19 20:34:59 +00:00
|
|
|
for (i = 0; i < data->acpi_data.state_count; i++) {
|
2006-06-04 23:37:58 +00:00
|
|
|
u32 index;
|
|
|
|
|
2008-08-19 20:34:59 +00:00
|
|
|
index = data->acpi_data.states[i].control & HW_PSTATE_MASK;
|
2007-10-17 21:52:08 +00:00
|
|
|
if (index > data->max_hw_pstate) {
|
2009-02-04 19:37:50 +00:00
|
|
|
printk(KERN_ERR PFX "invalid pstate %d - "
|
|
|
|
"bad value %d.\n", i, index);
|
|
|
|
printk(KERN_ERR PFX "Please report to BIOS "
|
|
|
|
"manufacturer\n");
|
|
|
|
invalidate_entry(data, i);
|
2007-10-17 21:52:08 +00:00
|
|
|
continue;
|
2006-06-04 23:37:58 +00:00
|
|
|
}
|
|
|
|
rdmsr(MSR_PSTATE_DEF_BASE + index, lo, hi);
|
|
|
|
if (!(hi & HW_PSTATE_VALID_MASK)) {
|
|
|
|
dprintk("invalid pstate %d, ignoring\n", index);
|
2009-02-04 19:37:50 +00:00
|
|
|
invalidate_entry(data, i);
|
2006-06-04 23:37:58 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2007-10-17 21:52:08 +00:00
|
|
|
powernow_table[i].index = index;
|
2006-06-04 23:37:58 +00:00
|
|
|
|
2009-04-22 11:48:33 +00:00
|
|
|
/* Frequency may be rounded for these */
|
|
|
|
if (boot_cpu_data.x86 == 0x10 || boot_cpu_data.x86 == 0x11) {
|
|
|
|
powernow_table[i].frequency =
|
|
|
|
freq_from_fid_did(lo & 0x3f, (lo >> 6) & 7);
|
|
|
|
} else
|
|
|
|
powernow_table[i].frequency =
|
|
|
|
data->acpi_data.states[i].core_frequency * 1000;
|
2006-06-04 23:37:58 +00:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
static int fill_powernow_table_fidvid(struct powernow_k8_data *data,
|
|
|
|
struct cpufreq_frequency_table *powernow_table)
|
2006-06-04 23:37:58 +00:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
int cntlofreq = 0;
|
2009-02-04 19:37:50 +00:00
|
|
|
|
2008-08-19 20:34:59 +00:00
|
|
|
for (i = 0; i < data->acpi_data.state_count; i++) {
|
2005-07-29 19:55:40 +00:00
|
|
|
u32 fid;
|
|
|
|
u32 vid;
|
2009-02-04 19:37:50 +00:00
|
|
|
u32 freq, index;
|
|
|
|
acpi_integer status, control;
|
2005-07-29 19:55:40 +00:00
|
|
|
|
|
|
|
if (data->exttype) {
|
2009-02-04 19:37:50 +00:00
|
|
|
status = data->acpi_data.states[i].status;
|
|
|
|
fid = status & EXT_FID_MASK;
|
|
|
|
vid = (status >> VID_SHIFT) & EXT_VID_MASK;
|
2005-07-28 16:40:04 +00:00
|
|
|
} else {
|
2009-02-04 19:37:50 +00:00
|
|
|
control = data->acpi_data.states[i].control;
|
|
|
|
fid = control & FID_MASK;
|
|
|
|
vid = (control >> VID_SHIFT) & VID_MASK;
|
2005-07-28 16:40:04 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
dprintk(" %d : fid 0x%x, vid 0x%x\n", i, fid, vid);
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
index = fid | (vid<<8);
|
|
|
|
powernow_table[i].index = index;
|
|
|
|
|
|
|
|
freq = find_khz_freq_from_fid(fid);
|
|
|
|
powernow_table[i].frequency = freq;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/* verify frequency is OK */
|
2009-02-04 19:37:50 +00:00
|
|
|
if ((freq > (MAX_FREQ * 1000)) || (freq < (MIN_FREQ * 1000))) {
|
|
|
|
dprintk("invalid freq %u kHz, ignoring\n", freq);
|
|
|
|
invalidate_entry(data, i);
|
2005-04-16 22:20:36 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
/* verify voltage is OK -
|
|
|
|
* BIOSs are using "off" to indicate invalid */
|
2005-07-28 16:40:04 +00:00
|
|
|
if (vid == VID_OFF) {
|
2005-04-16 22:20:36 +00:00
|
|
|
dprintk("invalid vid %u, ignoring\n", vid);
|
2009-02-04 19:37:50 +00:00
|
|
|
invalidate_entry(data, i);
|
2005-04-16 22:20:36 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2005-06-01 02:03:46 +00:00
|
|
|
/* verify only 1 entry from the lo frequency table */
|
|
|
|
if (fid < HI_FID_TABLE_BOTTOM) {
|
|
|
|
if (cntlofreq) {
|
2009-02-04 19:37:50 +00:00
|
|
|
/* if both entries are the same,
|
|
|
|
* ignore this one ... */
|
|
|
|
if ((freq != powernow_table[cntlofreq].frequency) ||
|
|
|
|
(index != powernow_table[cntlofreq].index)) {
|
|
|
|
printk(KERN_ERR PFX
|
|
|
|
"Too many lo freq table "
|
|
|
|
"entries\n");
|
2006-06-04 23:37:58 +00:00
|
|
|
return 1;
|
2005-06-01 02:03:46 +00:00
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
dprintk("double low frequency table entry, "
|
|
|
|
"ignoring it.\n");
|
|
|
|
invalidate_entry(data, i);
|
2005-06-01 02:03:46 +00:00
|
|
|
continue;
|
|
|
|
} else
|
|
|
|
cntlofreq = i;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
if (freq != (data->acpi_data.states[i].core_frequency * 1000)) {
|
|
|
|
printk(KERN_INFO PFX "invalid freq entries "
|
|
|
|
"%u kHz vs. %u kHz\n", freq,
|
|
|
|
(unsigned int)
|
|
|
|
(data->acpi_data.states[i].core_frequency
|
|
|
|
* 1000));
|
|
|
|
invalidate_entry(data, i);
|
2005-04-16 22:20:36 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data)
|
|
|
|
{
|
2008-08-19 20:34:59 +00:00
|
|
|
if (data->acpi_data.state_count)
|
2009-02-04 19:37:50 +00:00
|
|
|
acpi_processor_unregister_performance(&data->acpi_data,
|
|
|
|
data->cpu);
|
2009-01-01 02:08:47 +00:00
|
|
|
free_cpumask_var(data->acpi_data.shared_cpu_map);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2009-02-03 16:46:43 +00:00
|
|
|
static int get_transition_latency(struct powernow_k8_data *data)
|
|
|
|
{
|
|
|
|
int max_latency = 0;
|
|
|
|
int i;
|
|
|
|
for (i = 0; i < data->acpi_data.state_count; i++) {
|
|
|
|
int cur_latency = data->acpi_data.states[i].transition_latency
|
|
|
|
+ data->acpi_data.states[i].bus_master_latency;
|
|
|
|
if (cur_latency > max_latency)
|
|
|
|
max_latency = cur_latency;
|
|
|
|
}
|
2009-04-22 11:48:30 +00:00
|
|
|
if (max_latency == 0) {
|
|
|
|
/*
|
|
|
|
* Fam 11h always returns 0 as transition latency.
|
|
|
|
* This is intended and means "very fast". While cpufreq core
|
|
|
|
* and governors currently can handle that gracefully, better
|
|
|
|
* set it to 1 to avoid problems in the future.
|
|
|
|
* For all others it's a BIOS bug.
|
|
|
|
*/
|
|
|
|
if (!boot_cpu_data.x86 == 0x11)
|
|
|
|
printk(KERN_ERR FW_WARN PFX "Invalid zero transition "
|
|
|
|
"latency\n");
|
|
|
|
max_latency = 1;
|
|
|
|
}
|
2009-02-03 16:46:43 +00:00
|
|
|
/* value in usecs, needs to be in nanoseconds */
|
|
|
|
return 1000 * max_latency;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/* Take a frequency, and issue the fid/vid transition command */
|
2009-02-04 19:37:50 +00:00
|
|
|
static int transition_frequency_fidvid(struct powernow_k8_data *data,
|
|
|
|
unsigned int index)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-06-04 23:37:58 +00:00
|
|
|
u32 fid = 0;
|
|
|
|
u32 vid = 0;
|
2005-06-01 02:03:46 +00:00
|
|
|
int res, i;
|
2005-04-16 22:20:36 +00:00
|
|
|
struct cpufreq_freqs freqs;
|
|
|
|
|
|
|
|
dprintk("cpu %d transition to index %u\n", smp_processor_id(), index);
|
|
|
|
|
2006-06-04 23:37:58 +00:00
|
|
|
/* fid/vid correctness check for k8 */
|
2005-04-16 22:20:36 +00:00
|
|
|
/* fid are the lower 8 bits of the index we stored into
|
2006-06-04 23:37:58 +00:00
|
|
|
* the cpufreq frequency table in find_psb_table, vid
|
|
|
|
* are the upper 8 bits.
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
|
|
|
fid = data->powernow_table[index].index & 0xFF;
|
|
|
|
vid = (data->powernow_table[index].index & 0xFF00) >> 8;
|
|
|
|
|
|
|
|
dprintk("table matched fid 0x%x, giving vid 0x%x\n", fid, vid);
|
|
|
|
|
|
|
|
if (query_current_values_with_pending_wait(data))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if ((data->currvid == vid) && (data->currfid == fid)) {
|
|
|
|
dprintk("target matches current values (fid 0x%x, vid 0x%x)\n",
|
|
|
|
fid, vid);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
dprintk("cpu %d, changing to fid 0x%x, vid 0x%x\n",
|
|
|
|
smp_processor_id(), fid, vid);
|
|
|
|
freqs.old = find_khz_freq_from_fid(data->currfid);
|
|
|
|
freqs.new = find_khz_freq_from_fid(fid);
|
2006-06-04 23:37:58 +00:00
|
|
|
|
2009-06-12 11:28:37 +00:00
|
|
|
for_each_cpu(i, data->available_cores) {
|
2005-06-01 02:03:46 +00:00
|
|
|
freqs.cpu = i;
|
|
|
|
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
|
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
res = transition_fid_vid(data, fid, vid);
|
|
|
|
freqs.new = find_khz_freq_from_fid(data->currfid);
|
2006-06-04 23:37:58 +00:00
|
|
|
|
2009-06-12 11:28:37 +00:00
|
|
|
for_each_cpu(i, data->available_cores) {
|
2006-06-04 23:37:58 +00:00
|
|
|
freqs.cpu = i;
|
|
|
|
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
|
|
|
|
}
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Take a frequency, and issue the hardware pstate transition command */
|
2009-02-04 19:37:50 +00:00
|
|
|
static int transition_frequency_pstate(struct powernow_k8_data *data,
|
|
|
|
unsigned int index)
|
2006-06-04 23:37:58 +00:00
|
|
|
{
|
|
|
|
u32 pstate = 0;
|
|
|
|
int res, i;
|
|
|
|
struct cpufreq_freqs freqs;
|
|
|
|
|
|
|
|
dprintk("cpu %d transition to index %u\n", smp_processor_id(), index);
|
|
|
|
|
2007-10-17 21:52:08 +00:00
|
|
|
/* get MSR index for hardware pstate transition */
|
2006-06-04 23:37:58 +00:00
|
|
|
pstate = index & HW_PSTATE_MASK;
|
2007-10-17 21:52:08 +00:00
|
|
|
if (pstate > data->max_hw_pstate)
|
2006-06-04 23:37:58 +00:00
|
|
|
return 0;
|
2009-02-04 19:37:50 +00:00
|
|
|
freqs.old = find_khz_freq_from_pstate(data->powernow_table,
|
|
|
|
data->currpstate);
|
2007-10-17 21:52:08 +00:00
|
|
|
freqs.new = find_khz_freq_from_pstate(data->powernow_table, pstate);
|
2006-06-04 23:37:58 +00:00
|
|
|
|
2009-06-12 11:28:37 +00:00
|
|
|
for_each_cpu(i, data->available_cores) {
|
2006-06-04 23:37:58 +00:00
|
|
|
freqs.cpu = i;
|
|
|
|
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
|
|
|
|
}
|
|
|
|
|
|
|
|
res = transition_pstate(data, pstate);
|
2007-10-17 21:52:08 +00:00
|
|
|
freqs.new = find_khz_freq_from_pstate(data->powernow_table, pstate);
|
2006-06-04 23:37:58 +00:00
|
|
|
|
2009-06-12 11:28:37 +00:00
|
|
|
for_each_cpu(i, data->available_cores) {
|
2005-06-01 02:03:46 +00:00
|
|
|
freqs.cpu = i;
|
|
|
|
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
|
2006-05-30 21:25:14 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Driver entry point to switch to the target frequency */
|
2009-02-04 19:37:50 +00:00
|
|
|
static int powernowk8_target(struct cpufreq_policy *pol,
|
|
|
|
unsigned targfreq, unsigned relation)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-04-05 01:11:05 +00:00
|
|
|
cpumask_t oldmask;
|
2008-01-30 12:33:11 +00:00
|
|
|
struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu);
|
2006-04-18 22:07:28 +00:00
|
|
|
u32 checkfid;
|
|
|
|
u32 checkvid;
|
2005-04-16 22:20:36 +00:00
|
|
|
unsigned int newstate;
|
|
|
|
int ret = -EIO;
|
|
|
|
|
2006-04-07 17:49:51 +00:00
|
|
|
if (!data)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2006-04-18 22:07:28 +00:00
|
|
|
checkfid = data->currfid;
|
|
|
|
checkvid = data->currvid;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/* only run on specific CPU from here on */
|
|
|
|
oldmask = current->cpus_allowed;
|
2008-07-25 01:21:31 +00:00
|
|
|
set_cpus_allowed_ptr(current, &cpumask_of_cpu(pol->cpu));
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
if (smp_processor_id() != pol->cpu) {
|
2005-11-21 15:23:08 +00:00
|
|
|
printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (pending_bit_stuck()) {
|
|
|
|
printk(KERN_ERR PFX "failing targ, change pending bit set\n");
|
|
|
|
goto err_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
dprintk("targ: cpu %d, %d kHz, min %d, max %d, relation %d\n",
|
|
|
|
pol->cpu, targfreq, pol->min, pol->max, relation);
|
|
|
|
|
2006-05-30 21:43:54 +00:00
|
|
|
if (query_current_values_with_pending_wait(data))
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_out;
|
|
|
|
|
2007-10-17 21:52:08 +00:00
|
|
|
if (cpu_family != CPU_HW_PSTATE) {
|
2006-06-04 23:37:58 +00:00
|
|
|
dprintk("targ: curr fid 0x%x, vid 0x%x\n",
|
2005-04-16 22:20:36 +00:00
|
|
|
data->currfid, data->currvid);
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
if ((checkvid != data->currvid) ||
|
|
|
|
(checkfid != data->currfid)) {
|
2006-06-04 23:37:58 +00:00
|
|
|
printk(KERN_INFO PFX
|
2009-02-04 19:37:50 +00:00
|
|
|
"error - out of sync, fix 0x%x 0x%x, "
|
|
|
|
"vid 0x%x 0x%x\n",
|
|
|
|
checkfid, data->currfid,
|
|
|
|
checkvid, data->currvid);
|
2006-06-04 23:37:58 +00:00
|
|
|
}
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
if (cpufreq_frequency_table_target(pol, data->powernow_table,
|
|
|
|
targfreq, relation, &newstate))
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_out;
|
|
|
|
|
2006-03-26 09:37:14 +00:00
|
|
|
mutex_lock(&fidvid_mutex);
|
2005-06-01 02:03:46 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
powernow_k8_acpi_pst_values(data, newstate);
|
|
|
|
|
2006-06-08 15:30:17 +00:00
|
|
|
if (cpu_family == CPU_HW_PSTATE)
|
2006-06-04 23:37:58 +00:00
|
|
|
ret = transition_frequency_pstate(data, newstate);
|
|
|
|
else
|
|
|
|
ret = transition_frequency_fidvid(data, newstate);
|
|
|
|
if (ret) {
|
2005-04-16 22:20:36 +00:00
|
|
|
printk(KERN_ERR PFX "transition frequency failed\n");
|
|
|
|
ret = 1;
|
2006-03-26 09:37:14 +00:00
|
|
|
mutex_unlock(&fidvid_mutex);
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_out;
|
|
|
|
}
|
2006-03-26 09:37:14 +00:00
|
|
|
mutex_unlock(&fidvid_mutex);
|
2005-06-01 02:03:46 +00:00
|
|
|
|
2006-06-08 15:30:17 +00:00
|
|
|
if (cpu_family == CPU_HW_PSTATE)
|
2009-02-04 19:37:50 +00:00
|
|
|
pol->cur = find_khz_freq_from_pstate(data->powernow_table,
|
|
|
|
newstate);
|
2006-06-04 23:37:58 +00:00
|
|
|
else
|
|
|
|
pol->cur = find_khz_freq_from_fid(data->currfid);
|
2005-04-16 22:20:36 +00:00
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
err_out:
|
2008-04-05 01:11:05 +00:00
|
|
|
set_cpus_allowed_ptr(current, &oldmask);
|
2005-04-16 22:20:36 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Driver entry point to verify the policy and range of frequencies */
|
|
|
|
static int powernowk8_verify(struct cpufreq_policy *pol)
|
|
|
|
{
|
2008-01-30 12:33:11 +00:00
|
|
|
struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-04-07 17:49:51 +00:00
|
|
|
if (!data)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
return cpufreq_frequency_table_verify(pol, data->powernow_table);
|
|
|
|
}
|
|
|
|
|
2009-06-12 11:25:37 +00:00
|
|
|
struct init_on_cpu {
|
|
|
|
struct powernow_k8_data *data;
|
|
|
|
int rc;
|
|
|
|
};
|
|
|
|
|
|
|
|
static void __cpuinit powernowk8_cpu_init_on_cpu(void *_init_on_cpu)
|
|
|
|
{
|
|
|
|
struct init_on_cpu *init_on_cpu = _init_on_cpu;
|
|
|
|
|
|
|
|
if (pending_bit_stuck()) {
|
|
|
|
printk(KERN_ERR PFX "failing init, change pending bit set\n");
|
|
|
|
init_on_cpu->rc = -ENODEV;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (query_current_values_with_pending_wait(init_on_cpu->data)) {
|
|
|
|
init_on_cpu->rc = -ENODEV;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cpu_family == CPU_OPTERON)
|
|
|
|
fidvid_msr_init();
|
|
|
|
|
|
|
|
init_on_cpu->rc = 0;
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/* per CPU init entry point to the driver */
|
2006-01-16 00:56:36 +00:00
|
|
|
static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2009-06-10 19:41:37 +00:00
|
|
|
static const char ACPI_PSS_BIOS_BUG_MSG[] =
|
|
|
|
KERN_ERR FW_BUG PFX "No compatible ACPI _PSS objects found.\n"
|
2009-07-06 20:05:40 +00:00
|
|
|
FW_BUG PFX "Try again with latest BIOS.\n";
|
2005-04-16 22:20:36 +00:00
|
|
|
struct powernow_k8_data *data;
|
2009-06-12 11:25:37 +00:00
|
|
|
struct init_on_cpu init_on_cpu;
|
2006-04-07 17:49:48 +00:00
|
|
|
int rc;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-11-21 15:23:08 +00:00
|
|
|
if (!cpu_online(pol->cpu))
|
|
|
|
return -ENODEV;
|
|
|
|
|
2009-06-12 11:25:37 +00:00
|
|
|
smp_call_function_single(pol->cpu, check_supported_cpu, &rc, 1);
|
|
|
|
if (rc)
|
2005-04-16 22:20:36 +00:00
|
|
|
return -ENODEV;
|
|
|
|
|
2005-10-20 22:16:15 +00:00
|
|
|
data = kzalloc(sizeof(struct powernow_k8_data), GFP_KERNEL);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!data) {
|
|
|
|
printk(KERN_ERR PFX "unable to alloc powernow_k8_data");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
data->cpu = pol->cpu;
|
[CPUFREQ] powernow-k8: ignore out-of-range PstateStatus value
A workaround for AMD CPU family 11h erratum 311 might cause that the
P-state Status Register shows a "current P-state" which is larger than
the "current P-state limit" in P-state Current Limit Register. For the
wrong P-state value there is no ACPI _PSS object defined and
powernow-k8/cpufreq can't determine the proper CPU frequency for that
state.
As a consequence this can cause a panic during boot (potentially with
all recent kernel versions -- at least I have reproduced it with
various 2.6.27 kernels and with the current .28 series), as an
example:
powernow-k8: Found 1 AMD Turion(tm)X2 Ultra DualCore Mobile ZM-82 processors (2 \
)
powernow-k8: 0 : pstate 0 (2200 MHz)
powernow-k8: 1 : pstate 1 (1100 MHz)
powernow-k8: 2 : pstate 2 (600 MHz)
BUG: unable to handle kernel paging request at ffff88086e7528b8
IP: [<ffffffff80486361>] cpufreq_stats_update+0x4a/0x5f
PGD 202063 PUD 0
Oops: 0002 [#1] SMP
last sysfs file:
CPU 1
Modules linked in:
Pid: 1, comm: swapper Not tainted 2.6.28-rc3-dirty #16
RIP: 0010:[<ffffffff80486361>] [<ffffffff80486361>] cpufreq_stats_update+0x4a/0\
f
Synaptics claims to have extended capabilities, but I'm not able to read them.<6\
6
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88006e7528c0
RDX: 00000000ffffffff RSI: ffff88006e54af00 RDI: ffffffff808f056c
RBP: 00000000fffee697 R08: 0000000000000003 R09: ffff88006e73f080
R10: 0000000000000001 R11: 00000000002191c0 R12: ffff88006fb83c10
R13: 00000000ffffffff R14: 0000000000000001 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88006fb50740(0000) knlGS:0000000000000000
Unable to initialize Synaptics hardware.
CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: ffff88086e7528b8 CR3: 0000000000201000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper (pid: 1, threadinfo ffff88006fb82000, task ffff88006fb816d0)
Stack:
ffff88006e74da50 0000000000000000 ffff88006e54af00 ffffffff804863c7
ffff88006e74da50 0000000000000000 00000000ffffffff 0000000000000000
ffff88006fb83c10 ffffffff8024b46c ffffffff808f0560 ffff88006fb83c10
Call Trace:
[<ffffffff804863c7>] ? cpufreq_stat_notifier_trans+0x51/0x83
[<ffffffff8024b46c>] ? notifier_call_chain+0x29/0x4c
[<ffffffff8024b561>] ? __srcu_notifier_call_chain+0x46/0x61
[<ffffffff8048496d>] ? cpufreq_notify_transition+0x93/0xa9
[<ffffffff8021ab8d>] ? powernowk8_target+0x1e8/0x5f3
[<ffffffff80486687>] ? cpufreq_governor_performance+0x1b/0x20
[<ffffffff80484886>] ? __cpufreq_governor+0x71/0xa8
[<ffffffff80484b21>] ? __cpufreq_set_policy+0x101/0x13e
[<ffffffff80485bcd>] ? cpufreq_add_dev+0x3f0/0x4cd
[<ffffffff8048577a>] ? handle_update+0x0/0x8
[<ffffffff803c2062>] ? sysdev_driver_register+0xb6/0x10d
[<ffffffff8056592c>] ? powernowk8_init+0x0/0x7e
[<ffffffff8048604c>] ? cpufreq_register_driver+0x8f/0x140
[<ffffffff80209056>] ? _stext+0x56/0x14f
[<ffffffff802c2234>] ? proc_register+0x122/0x17d
[<ffffffff802c23a0>] ? create_proc_entry+0x73/0x8a
[<ffffffff8025c259>] ? register_irq_proc+0x92/0xaa
[<ffffffff8025c2c8>] ? init_irq_proc+0x57/0x69
[<ffffffff807fc85f>] ? kernel_init+0x116/0x169
[<ffffffff8020cc79>] ? child_rip+0xa/0x11
[<ffffffff807fc749>] ? kernel_init+0x0/0x169
[<ffffffff8020cc6f>] ? child_rip+0x0/0x11
Code: 05 c5 83 36 00 48 c7 c2 48 5d 86 80 48 8b 04 d8 48 8b 40 08 48 8b 34 02 48\
RIP [<ffffffff80486361>] cpufreq_stats_update+0x4a/0x5f
RSP <ffff88006fb83b20>
CR2: ffff88086e7528b8
---[ end trace 0678bac75e67a2f7 ]---
Kernel panic - not syncing: Attempted to kill init!
In short, aftereffect of the wrong P-state is that
cpufreq_stats_update() uses "-1" as index for some array in
cpufreq_stats_update (unsigned int cpu)
{
...
if (stat->time_in_state)
stat->time_in_state[stat->last_index] =
cputime64_add(stat->time_in_state[stat->last_index],
cputime_sub(cur_time, stat->last_time));
...
}
Fortunately, the wrong P-state value is returned only if the core is
in P-state 0. This fix solves the problem by detecting the
out-of-range P-state, ignoring it, and using "0" instead.
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2008-11-21 13:49:25 +00:00
|
|
|
data->currpstate = HW_PSTATE_INVALID;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-02-16 23:31:58 +00:00
|
|
|
if (powernow_k8_cpu_init_acpi(data)) {
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* Use the PSB BIOS structure. This is only availabe on
|
|
|
|
* an UP version, and is deprecated by AMD.
|
|
|
|
*/
|
2006-06-21 05:32:56 +00:00
|
|
|
if (num_online_cpus() != 1) {
|
2009-04-22 11:48:32 +00:00
|
|
|
printk_once(ACPI_PSS_BIOS_BUG_MSG);
|
2009-02-18 19:11:00 +00:00
|
|
|
goto err_out;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
if (pol->cpu != 0) {
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "No ACPI _PSS objects for "
|
|
|
|
"CPU other than CPU0. Complain to your BIOS "
|
|
|
|
"vendor.\n");
|
2009-02-18 19:11:00 +00:00
|
|
|
goto err_out;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
rc = find_psb_table(data);
|
2009-02-18 19:11:00 +00:00
|
|
|
if (rc)
|
|
|
|
goto err_out;
|
|
|
|
|
2009-02-03 16:46:43 +00:00
|
|
|
/* Take a crude guess here.
|
|
|
|
* That guess was in microseconds, so multiply with 1000 */
|
|
|
|
pol->cpuinfo.transition_latency = (
|
|
|
|
((data->rvo + 8) * data->vstable * VST_UNITS_20US) +
|
|
|
|
((1 << data->irt) * 30)) * 1000;
|
|
|
|
} else /* ACPI _PSS objects available */
|
|
|
|
pol->cpuinfo.transition_latency = get_transition_latency(data);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/* only run on specific CPU from here on */
|
2009-06-12 11:25:37 +00:00
|
|
|
init_on_cpu.data = data;
|
|
|
|
smp_call_function_single(data->cpu, powernowk8_cpu_init_on_cpu,
|
|
|
|
&init_on_cpu, 1);
|
|
|
|
rc = init_on_cpu.rc;
|
|
|
|
if (rc != 0)
|
|
|
|
goto err_out_exit_acpi;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-08-19 20:34:59 +00:00
|
|
|
if (cpu_family == CPU_HW_PSTATE)
|
2009-01-04 13:18:06 +00:00
|
|
|
cpumask_copy(pol->cpus, cpumask_of(pol->cpu));
|
2008-08-19 20:34:59 +00:00
|
|
|
else
|
2009-03-13 04:19:50 +00:00
|
|
|
cpumask_copy(pol->cpus, cpu_core_mask(pol->cpu));
|
2009-01-04 13:18:06 +00:00
|
|
|
data->available_cores = pol->cpus;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-06-08 15:30:17 +00:00
|
|
|
if (cpu_family == CPU_HW_PSTATE)
|
2009-02-04 19:37:50 +00:00
|
|
|
pol->cur = find_khz_freq_from_pstate(data->powernow_table,
|
|
|
|
data->currpstate);
|
2006-06-04 23:37:58 +00:00
|
|
|
else
|
|
|
|
pol->cur = find_khz_freq_from_fid(data->currfid);
|
2005-04-16 22:20:36 +00:00
|
|
|
dprintk("policy current frequency %d kHz\n", pol->cur);
|
|
|
|
|
|
|
|
/* min/max the cpu is capable of */
|
|
|
|
if (cpufreq_frequency_table_cpuinfo(pol, data->powernow_table)) {
|
2008-09-01 12:27:03 +00:00
|
|
|
printk(KERN_ERR FW_BUG PFX "invalid powernow_table\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
powernow_k8_cpu_exit_acpi(data);
|
|
|
|
kfree(data->powernow_table);
|
|
|
|
kfree(data);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
cpufreq_frequency_table_get_attr(data->powernow_table, pol->cpu);
|
|
|
|
|
2006-06-08 15:30:17 +00:00
|
|
|
if (cpu_family == CPU_HW_PSTATE)
|
2009-02-04 19:37:50 +00:00
|
|
|
dprintk("cpu_init done, current pstate 0x%x\n",
|
|
|
|
data->currpstate);
|
2006-06-04 23:37:58 +00:00
|
|
|
else
|
|
|
|
dprintk("cpu_init done, current fid 0x%x, vid 0x%x\n",
|
|
|
|
data->currfid, data->currvid);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-01-30 12:33:11 +00:00
|
|
|
per_cpu(powernow_data, pol->cpu) = data;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
2009-06-12 11:25:37 +00:00
|
|
|
err_out_exit_acpi:
|
2005-04-16 22:20:36 +00:00
|
|
|
powernow_k8_cpu_exit_acpi(data);
|
|
|
|
|
2009-02-18 19:11:00 +00:00
|
|
|
err_out:
|
2005-04-16 22:20:36 +00:00
|
|
|
kfree(data);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
static int __devexit powernowk8_cpu_exit(struct cpufreq_policy *pol)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-01-30 12:33:11 +00:00
|
|
|
struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
if (!data)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
powernow_k8_cpu_exit_acpi(data);
|
|
|
|
|
|
|
|
cpufreq_frequency_table_put_attr(pol->cpu);
|
|
|
|
|
|
|
|
kfree(data->powernow_table);
|
|
|
|
kfree(data);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-06-12 11:25:37 +00:00
|
|
|
static void query_values_on_cpu(void *_err)
|
|
|
|
{
|
|
|
|
int *err = _err;
|
|
|
|
struct powernow_k8_data *data = __get_cpu_var(powernow_data);
|
|
|
|
|
|
|
|
*err = query_current_values_with_pending_wait(data);
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
static unsigned int powernowk8_get(unsigned int cpu)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2009-06-11 15:26:54 +00:00
|
|
|
struct powernow_k8_data *data = per_cpu(powernow_data, cpu);
|
2005-04-16 22:20:36 +00:00
|
|
|
unsigned int khz = 0;
|
2009-06-12 11:25:37 +00:00
|
|
|
int err;
|
2006-03-27 15:57:20 +00:00
|
|
|
|
|
|
|
if (!data)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2009-06-12 11:25:37 +00:00
|
|
|
smp_call_function_single(cpu, query_values_on_cpu, &err, true);
|
|
|
|
if (err)
|
2005-04-16 22:20:36 +00:00
|
|
|
goto out;
|
|
|
|
|
2007-01-30 15:53:54 +00:00
|
|
|
if (cpu_family == CPU_HW_PSTATE)
|
2008-04-05 01:11:05 +00:00
|
|
|
khz = find_khz_freq_from_pstate(data->powernow_table,
|
|
|
|
data->currpstate);
|
2007-01-30 15:53:54 +00:00
|
|
|
else
|
|
|
|
khz = find_khz_freq_from_fid(data->currfid);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-09-23 18:10:42 +00:00
|
|
|
out:
|
2005-04-16 22:20:36 +00:00
|
|
|
return khz;
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
static struct freq_attr *powernow_k8_attr[] = {
|
2005-04-16 22:20:36 +00:00
|
|
|
&cpufreq_freq_attr_scaling_available_freqs,
|
|
|
|
NULL,
|
|
|
|
};
|
|
|
|
|
2007-02-26 22:55:48 +00:00
|
|
|
static struct cpufreq_driver cpufreq_amd64_driver = {
|
2005-04-16 22:20:36 +00:00
|
|
|
.verify = powernowk8_verify,
|
|
|
|
.target = powernowk8_target,
|
|
|
|
.init = powernowk8_cpu_init,
|
|
|
|
.exit = __devexit_p(powernowk8_cpu_exit),
|
|
|
|
.get = powernowk8_get,
|
|
|
|
.name = "powernow-k8",
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.attr = powernow_k8_attr,
|
|
|
|
};
|
|
|
|
|
|
|
|
/* driver entry point for init */
|
2006-01-16 00:56:36 +00:00
|
|
|
static int __cpuinit powernowk8_init(void)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
unsigned int i, supported_cpus = 0;
|
|
|
|
|
2006-03-24 11:15:07 +00:00
|
|
|
for_each_online_cpu(i) {
|
2009-06-12 11:25:37 +00:00
|
|
|
int rc;
|
|
|
|
smp_call_function_single(i, check_supported_cpu, &rc, 1);
|
|
|
|
if (rc == 0)
|
2005-04-16 22:20:36 +00:00
|
|
|
supported_cpus++;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (supported_cpus == num_online_cpus()) {
|
2006-06-04 23:37:58 +00:00
|
|
|
printk(KERN_INFO PFX "Found %d %s "
|
2007-05-18 17:22:28 +00:00
|
|
|
"processors (%d cpu cores) (" VERSION ")\n",
|
2007-08-23 01:44:20 +00:00
|
|
|
num_online_nodes(),
|
2007-05-18 17:22:28 +00:00
|
|
|
boot_cpu_data.x86_model_id, supported_cpus);
|
2005-04-16 22:20:36 +00:00
|
|
|
return cpufreq_register_driver(&cpufreq_amd64_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* driver entry point for term */
|
|
|
|
static void __exit powernowk8_exit(void)
|
|
|
|
{
|
|
|
|
dprintk("exit\n");
|
|
|
|
|
|
|
|
cpufreq_unregister_driver(&cpufreq_amd64_driver);
|
|
|
|
}
|
|
|
|
|
2009-02-04 19:37:50 +00:00
|
|
|
MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com> and "
|
|
|
|
"Mark Langsdorf <mark.langsdorf@amd.com>");
|
2005-04-16 22:20:36 +00:00
|
|
|
MODULE_DESCRIPTION("AMD Athlon 64 and Opteron processor frequency driver.");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
|
|
late_initcall(powernowk8_init);
|
|
|
|
module_exit(powernowk8_exit);
|