From ee580dc91efd83e6b55955e7261e8ad2a0e08d1a Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 11 Oct 2007 11:16:27 +0200 Subject: i386: move kernel/cpu/cpufreq Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/i386/kernel/cpu/cpufreq/powernow-k8.c | 1363 ---------------------------- 1 file changed, 1363 deletions(-) delete mode 100644 arch/i386/kernel/cpu/cpufreq/powernow-k8.c (limited to 'arch/i386/kernel/cpu/cpufreq/powernow-k8.c') diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c deleted file mode 100644 index 34ed53a0673..00000000000 --- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c +++ /dev/null @@ -1,1363 +0,0 @@ -/* - * (c) 2003-2006 Advanced Micro Devices, Inc. - * Your use of this code is subject to the terms and conditions of the - * GNU general public license version 2. See "COPYING" or - * http://www.gnu.org/licenses/gpl.html - * - * Support : mark.langsdorf@amd.com - * - * Based on the powernow-k7.c module written by Dave Jones. - * (C) 2003 Dave Jones on behalf of SuSE Labs - * (C) 2004 Dominik Brodowski - * (C) 2004 Pavel Machek - * Licensed under the terms of the GNU GPL License version 2. - * Based upon datasheets & sample CPUs kindly provided by AMD. - * - * Valuable input gratefully received from Dave Jones, Pavel Machek, - * Dominik Brodowski, Jacob Shin, and others. - * Originally developed by Paul Devriendt. - * Processor information obtained from Chapter 9 (Power and Thermal Management) - * of the "BIOS and Kernel Developer's Guide for the AMD Athlon 64 and AMD - * Opteron Processors" available for download from www.amd.com - * - * Tables for specific CPUs can be inferred from - * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/30430.pdf - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include /* for current / set_cpus_allowed() */ - -#include -#include -#include - -#ifdef CONFIG_X86_POWERNOW_K8_ACPI -#include -#include -#include -#endif - -#define PFX "powernow-k8: " -#define BFX PFX "BIOS error: " -#define VERSION "version 2.00.00" -#include "powernow-k8.h" - -/* serialize freq changes */ -static DEFINE_MUTEX(fidvid_mutex); - -static struct powernow_k8_data *powernow_data[NR_CPUS]; - -static int cpu_family = CPU_OPTERON; - -#ifndef CONFIG_SMP -static cpumask_t cpu_core_map[1]; -#endif - -/* Return a frequency in MHz, given an input fid */ -static u32 find_freq_from_fid(u32 fid) -{ - return 800 + (fid * 100); -} - - -/* Return a frequency in KHz, given an input fid */ -static u32 find_khz_freq_from_fid(u32 fid) -{ - return 1000 * find_freq_from_fid(fid); -} - -/* Return a frequency in MHz, given an input fid and did */ -static u32 find_freq_from_fiddid(u32 fid, u32 did) -{ - return 100 * (fid + 0x10) >> did; -} - -static u32 find_khz_freq_from_fiddid(u32 fid, u32 did) -{ - return 1000 * find_freq_from_fiddid(fid, did); -} - -static u32 find_fid_from_pstate(u32 pstate) -{ - u32 hi, lo; - rdmsr(MSR_PSTATE_DEF_BASE + pstate, lo, hi); - return lo & HW_PSTATE_FID_MASK; -} - -static u32 find_did_from_pstate(u32 pstate) -{ - u32 hi, lo; - rdmsr(MSR_PSTATE_DEF_BASE + pstate, lo, hi); - return (lo & HW_PSTATE_DID_MASK) >> HW_PSTATE_DID_SHIFT; -} - -/* Return the vco fid for an input fid - * - * Each "low" fid has corresponding "high" fid, and you can get to "low" fids - * only from corresponding high fids. This returns "high" fid corresponding to - * "low" one. - */ -static u32 convert_fid_to_vco_fid(u32 fid) -{ - if (fid < HI_FID_TABLE_BOTTOM) - return 8 + (2 * fid); - else - return fid; -} - -/* - * Return 1 if the pending bit is set. Unless we just instructed the processor - * to transition to a new state, seeing this bit set is really bad news. - */ -static int pending_bit_stuck(void) -{ - u32 lo, hi; - - if (cpu_family == CPU_HW_PSTATE) - return 0; - - rdmsr(MSR_FIDVID_STATUS, lo, hi); - return lo & MSR_S_LO_CHANGE_PENDING ? 1 : 0; -} - -/* - * Update the global current fid / vid values from the status msr. - * Returns 1 on error. - */ -static int query_current_values_with_pending_wait(struct powernow_k8_data *data) -{ - u32 lo, hi; - u32 i = 0; - - if (cpu_family == CPU_HW_PSTATE) { - rdmsr(MSR_PSTATE_STATUS, lo, hi); - i = lo & HW_PSTATE_MASK; - rdmsr(MSR_PSTATE_DEF_BASE + i, lo, hi); - data->currfid = lo & HW_PSTATE_FID_MASK; - data->currdid = (lo & HW_PSTATE_DID_MASK) >> HW_PSTATE_DID_SHIFT; - return 0; - } - do { - if (i++ > 10000) { - dprintk("detected change pending stuck\n"); - return 1; - } - rdmsr(MSR_FIDVID_STATUS, lo, hi); - } while (lo & MSR_S_LO_CHANGE_PENDING); - - data->currvid = hi & MSR_S_HI_CURRENT_VID; - data->currfid = lo & MSR_S_LO_CURRENT_FID; - - return 0; -} - -/* the isochronous relief time */ -static void count_off_irt(struct powernow_k8_data *data) -{ - udelay((1 << data->irt) * 10); - return; -} - -/* the voltage stabalization time */ -static void count_off_vst(struct powernow_k8_data *data) -{ - udelay(data->vstable * VST_UNITS_20US); - return; -} - -/* need to init the control msr to a safe value (for each cpu) */ -static void fidvid_msr_init(void) -{ - u32 lo, hi; - u8 fid, vid; - - rdmsr(MSR_FIDVID_STATUS, lo, hi); - vid = hi & MSR_S_HI_CURRENT_VID; - fid = lo & MSR_S_LO_CURRENT_FID; - lo = fid | (vid << MSR_C_LO_VID_SHIFT); - hi = MSR_C_HI_STP_GNT_BENIGN; - dprintk("cpu%d, init lo 0x%x, hi 0x%x\n", smp_processor_id(), lo, hi); - wrmsr(MSR_FIDVID_CTL, lo, hi); -} - - -/* write the new fid value along with the other control fields to the msr */ -static int write_new_fid(struct powernow_k8_data *data, u32 fid) -{ - u32 lo; - u32 savevid = data->currvid; - u32 i = 0; - - if ((fid & INVALID_FID_MASK) || (data->currvid & INVALID_VID_MASK)) { - printk(KERN_ERR PFX "internal error - overflow on fid write\n"); - return 1; - } - - lo = fid | (data->currvid << MSR_C_LO_VID_SHIFT) | MSR_C_LO_INIT_FID_VID; - - dprintk("writing fid 0x%x, lo 0x%x, hi 0x%x\n", - fid, lo, data->plllock * PLL_LOCK_CONVERSION); - - do { - wrmsr(MSR_FIDVID_CTL, lo, data->plllock * PLL_LOCK_CONVERSION); - if (i++ > 100) { - printk(KERN_ERR PFX "Hardware error - pending bit very stuck - no further pstate changes possible\n"); - return 1; - } - } while (query_current_values_with_pending_wait(data)); - - count_off_irt(data); - - if (savevid != data->currvid) { - printk(KERN_ERR PFX "vid change on fid trans, old 0x%x, new 0x%x\n", - savevid, data->currvid); - return 1; - } - - if (fid != data->currfid) { - printk(KERN_ERR PFX "fid trans failed, fid 0x%x, curr 0x%x\n", fid, - data->currfid); - return 1; - } - - return 0; -} - -/* Write a new vid to the hardware */ -static int write_new_vid(struct powernow_k8_data *data, u32 vid) -{ - u32 lo; - u32 savefid = data->currfid; - int i = 0; - - if ((data->currfid & INVALID_FID_MASK) || (vid & INVALID_VID_MASK)) { - printk(KERN_ERR PFX "internal error - overflow on vid write\n"); - return 1; - } - - lo = data->currfid | (vid << MSR_C_LO_VID_SHIFT) | MSR_C_LO_INIT_FID_VID; - - dprintk("writing vid 0x%x, lo 0x%x, hi 0x%x\n", - vid, lo, STOP_GRANT_5NS); - - do { - wrmsr(MSR_FIDVID_CTL, lo, STOP_GRANT_5NS); - if (i++ > 100) { - printk(KERN_ERR PFX "internal error - pending bit very stuck - no further pstate changes possible\n"); - return 1; - } - } while (query_current_values_with_pending_wait(data)); - - if (savefid != data->currfid) { - printk(KERN_ERR PFX "fid changed on vid trans, old 0x%x new 0x%x\n", - savefid, data->currfid); - return 1; - } - - if (vid != data->currvid) { - printk(KERN_ERR PFX "vid trans failed, vid 0x%x, curr 0x%x\n", vid, - data->currvid); - return 1; - } - - return 0; -} - -/* - * Reduce the vid by the max of step or reqvid. - * Decreasing vid codes represent increasing voltages: - * vid of 0 is 1.550V, vid of 0x1e is 0.800V, vid of VID_OFF is off. - */ -static int decrease_vid_code_by_step(struct powernow_k8_data *data, u32 reqvid, u32 step) -{ - if ((data->currvid - reqvid) > step) - reqvid = data->currvid - step; - - if (write_new_vid(data, reqvid)) - return 1; - - count_off_vst(data); - - return 0; -} - -/* Change hardware pstate by single MSR write */ -static int transition_pstate(struct powernow_k8_data *data, u32 pstate) -{ - wrmsr(MSR_PSTATE_CTRL, pstate, 0); - data->currfid = find_fid_from_pstate(pstate); - return 0; -} - -/* Change Opteron/Athlon64 fid and vid, by the 3 phases. */ -static int transition_fid_vid(struct powernow_k8_data *data, u32 reqfid, u32 reqvid) -{ - if (core_voltage_pre_transition(data, reqvid)) - 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)) { - printk(KERN_ERR PFX "failed (cpu%d): req 0x%x 0x%x, curr 0x%x 0x%x\n", - 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 */ -static int core_voltage_pre_transition(struct powernow_k8_data *data, u32 reqvid) -{ - u32 rvosteps = data->rvo; - u32 savefid = data->currfid; - u32 maxvid, lo; - - dprintk("ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, reqvid 0x%x, rvo 0x%x\n", - smp_processor_id(), - data->currfid, data->currvid, reqvid, data->rvo); - - 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; - - 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; - } - - while ((rvosteps > 0) && ((data->rvo + data->currvid) > reqvid)) { - if (data->currvid == maxvid) { - rvosteps = 0; - } else { - dprintk("ph1: changing vid for rvo, req 0x%x\n", - data->currvid - 1); - if (decrease_vid_code_by_step(data, data->currvid - 1, 1)) - return 1; - rvosteps--; - } - } - - if (query_current_values_with_pending_wait(data)) - return 1; - - if (savefid != data->currfid) { - printk(KERN_ERR PFX "ph1 err, currfid changed 0x%x\n", data->currfid); - 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) -{ - u32 vcoreqfid, vcocurrfid, vcofiddiff, fid_interval, savevid = data->currvid; - - if ((reqfid < HI_FID_TABLE_BOTTOM) && (data->currfid < HI_FID_TABLE_BOTTOM)) { - printk(KERN_ERR PFX "ph2: illegal lo-lo transition 0x%x 0x%x\n", - reqfid, data->currfid); - return 1; - } - - if (data->currfid == reqfid) { - printk(KERN_ERR PFX "ph2 null fid transition 0x%x\n", data->currfid); - return 0; - } - - dprintk("ph2 (cpu%d): starting, currfid 0x%x, currvid 0x%x, reqfid 0x%x\n", - 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; - - while (vcofiddiff > 2) { - (data->currfid & 1) ? (fid_interval = 1) : (fid_interval = 2); - - if (reqfid > data->currfid) { - if (data->currfid > LO_FID_TABLE_TOP) { - if (write_new_fid(data, data->currfid + fid_interval)) { - return 1; - } - } else { - if (write_new_fid - (data, 2 + convert_fid_to_vco_fid(data->currfid))) { - return 1; - } - } - } else { - if (write_new_fid(data, data->currfid - fid_interval)) - 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 - "ph2: mismatch, failed fid transition, curr 0x%x, req 0x%x\n", - 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. */ -static int core_voltage_post_transition(struct powernow_k8_data *data, u32 reqvid) -{ - 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 - "ph3: failed vid transition\n, req 0x%x, curr 0x%x", - 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; -} - -static int check_supported_cpu(unsigned int cpu) -{ - cpumask_t oldmask = CPU_MASK_ALL; - u32 eax, ebx, ecx, edx; - unsigned int rc = 0; - - oldmask = current->cpus_allowed; - set_cpus_allowed(current, cpumask_of_cpu(cpu)); - - if (smp_processor_id() != cpu) { - printk(KERN_ERR PFX "limiting to cpu %u failed\n", cpu); - goto out; - } - - if (current_cpu_data.x86_vendor != X86_VENDOR_AMD) - goto out; - - eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); - if (((eax & CPUID_XFAM) != CPUID_XFAM_K8) && - ((eax & CPUID_XFAM) < CPUID_XFAM_10H)) - goto out; - - if ((eax & CPUID_XFAM) == CPUID_XFAM_K8) { - if (((eax & CPUID_USE_XFAM_XMOD) != CPUID_USE_XFAM_XMOD) || - ((eax & CPUID_XMOD) > CPUID_XMOD_REV_MASK)) { - printk(KERN_INFO PFX "Processor cpuid %x not supported\n", eax); - goto out; - } - - eax = cpuid_eax(CPUID_GET_MAX_CAPABILITIES); - if (eax < CPUID_FREQ_VOLT_CAPABILITIES) { - printk(KERN_INFO PFX - "No frequency change capabilities detected\n"); - goto out; - } - - cpuid(CPUID_FREQ_VOLT_CAPABILITIES, &eax, &ebx, &ecx, &edx); - if ((edx & P_STATE_TRANSITION_CAPABLE) != P_STATE_TRANSITION_CAPABLE) { - printk(KERN_INFO PFX "Power state transitions not supported\n"); - goto out; - } - } 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 - goto out; - } - - rc = 1; - -out: - set_cpus_allowed(current, oldmask); - return rc; -} - -static int check_pst_table(struct powernow_k8_data *data, struct pst_s *pst, u8 maxvid) -{ - unsigned int j; - u8 lastfid = 0xff; - - for (j = 0; j < data->numps; j++) { - if (pst[j].vid > LEAST_VID) { - printk(KERN_ERR PFX "vid %d invalid : 0x%x\n", j, pst[j].vid); - return -EINVAL; - } - if (pst[j].vid < data->rvo) { /* vid + rvo >= 0 */ - printk(KERN_ERR BFX "0 vid exceeded with pstate %d\n", j); - return -ENODEV; - } - if (pst[j].vid < maxvid + data->rvo) { /* vid + rvo >= maxvid */ - printk(KERN_ERR BFX "maxvid exceeded with pstate %d\n", j); - return -ENODEV; - } - if (pst[j].fid > MAX_FID) { - printk(KERN_ERR BFX "maxfid exceeded with pstate %d\n", j); - return -ENODEV; - } - if (j && (pst[j].fid < HI_FID_TABLE_BOTTOM)) { - /* Only first fid is allowed to be in "low" range */ - printk(KERN_ERR BFX "two low fids - %d : 0x%x\n", j, pst[j].fid); - return -EINVAL; - } - if (pst[j].fid < lastfid) - lastfid = pst[j].fid; - } - if (lastfid & 1) { - printk(KERN_ERR BFX "lastfid invalid\n"); - return -EINVAL; - } - if (lastfid > LO_FID_TABLE_TOP) - printk(KERN_INFO BFX "first fid not from lo freq table\n"); - - return 0; -} - -static void print_basics(struct powernow_k8_data *data) -{ - int j; - for (j = 0; j < data->numps; j++) { - if (data->powernow_table[j].frequency != CPUFREQ_ENTRY_INVALID) { - if (cpu_family == CPU_HW_PSTATE) { - printk(KERN_INFO PFX " %d : fid 0x%x did 0x%x (%d MHz)\n", - j, - (data->powernow_table[j].index & 0xff00) >> 8, - (data->powernow_table[j].index & 0xff0000) >> 16, - data->powernow_table[j].frequency/1000); - } else { - printk(KERN_INFO PFX " %d : fid 0x%x (%d MHz), vid 0x%x\n", - j, - data->powernow_table[j].index & 0xff, - data->powernow_table[j].frequency/1000, - data->powernow_table[j].index >> 8); - } - } - } - if (data->batps) - printk(KERN_INFO PFX "Only %d pstates on battery\n", data->batps); -} - -static int fill_powernow_table(struct powernow_k8_data *data, struct pst_s *pst, u8 maxvid) -{ - struct cpufreq_frequency_table *powernow_table; - unsigned int j; - - 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); - data->numps = data->batps; - } - - for ( j=1; jnumps; j++ ) { - 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++) { - powernow_table[j].index = pst[j].fid; /* lower 8 bits */ - powernow_table[j].index |= (pst[j].vid << 8); /* upper 8 bits */ - powernow_table[j].frequency = find_khz_freq_from_fid(pst[j].fid); - } - 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; - if (first_cpu(cpu_core_map[data->cpu]) == data->cpu) - print_basics(data); - - for (j = 0; j < data->numps; j++) - if ((pst[j].fid==data->currfid) && (pst[j].vid==data->currvid)) - 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) { - printk(KERN_ERR BFX "PSB table is not v1.4\n"); - return -ENODEV; - } - - dprintk("flags: 0x%x\n", psb->flags1); - if (psb->flags1) { - printk(KERN_ERR BFX "unknown flags\n"); - return -ENODEV; - } - - data->vstable = psb->vstable; - dprintk("voltage stabilization time: %d(*20us)\n", data->vstable); - - 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; - if ((psb->cpuid == 0x00000fc0) || (psb->cpuid == 0x00000fe0) ){ - thiscpuid = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); - if ((thiscpuid == 0x00000fc0) || (thiscpuid == 0x00000fe0) ) { - cpst = 1; - } - } - if (cpst != 1) { - printk(KERN_ERR BFX "numpst must be 1\n"); - 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); - return fill_powernow_table(data, (struct pst_s *)(psb+1), maxvid); - } - /* - * 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 - */ - printk(KERN_ERR PFX "BIOS error - no PSB or ACPI _PSS objects\n"); - return -ENODEV; -} - -#ifdef CONFIG_X86_POWERNOW_K8_ACPI -static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index) -{ - if (!data->acpi_data.state_count || (cpu_family == CPU_HW_PSTATE)) - return; - - data->irt = (data->acpi_data.states[index].control >> IRT_SHIFT) & IRT_MASK; - data->rvo = (data->acpi_data.states[index].control >> RVO_SHIFT) & RVO_MASK; - data->exttype = (data->acpi_data.states[index].control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK; - data->plllock = (data->acpi_data.states[index].control >> PLL_L_SHIFT) & PLL_L_MASK; - data->vidmvs = 1 << ((data->acpi_data.states[index].control >> MVS_SHIFT) & MVS_MASK); - data->vstable = (data->acpi_data.states[index].control >> VST_SHIFT) & VST_MASK; -} - -static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data) -{ - struct cpufreq_frequency_table *powernow_table; - int ret_val; - - if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) { - dprintk("register performance failed: bad ACPI data\n"); - return -EIO; - } - - /* verify the data contained in the ACPI structures */ - if (data->acpi_data.state_count <= 1) { - dprintk("No ACPI P-States\n"); - goto err_out; - } - - if ((data->acpi_data.control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) || - (data->acpi_data.status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) { - dprintk("Invalid control/status registers (%x - %x)\n", - data->acpi_data.control_register.space_id, - data->acpi_data.status_register.space_id); - goto err_out; - } - - /* fill in data->powernow_table */ - powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table) - * (data->acpi_data.state_count + 1)), GFP_KERNEL); - if (!powernow_table) { - dprintk("powernow_table memory alloc failure\n"); - goto err_out; - } - - if (cpu_family == CPU_HW_PSTATE) - 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; - - powernow_table[data->acpi_data.state_count].frequency = CPUFREQ_TABLE_END; - powernow_table[data->acpi_data.state_count].index = 0; - data->powernow_table = powernow_table; - - /* fill in data */ - data->numps = data->acpi_data.state_count; - if (first_cpu(cpu_core_map[data->cpu]) == data->cpu) - print_basics(data); - powernow_k8_acpi_pst_values(data, 0); - - /* notify BIOS that we exist */ - acpi_processor_notify_smm(THIS_MODULE); - - return 0; - -err_out_mem: - kfree(powernow_table); - -err_out: - acpi_processor_unregister_performance(&data->acpi_data, data->cpu); - - /* data->acpi_data.state_count informs us at ->exit() whether ACPI was used */ - data->acpi_data.state_count = 0; - - return -ENODEV; -} - -static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpufreq_frequency_table *powernow_table) -{ - int i; - - for (i = 0; i < data->acpi_data.state_count; i++) { - u32 index; - u32 hi = 0, lo = 0; - u32 fid; - u32 did; - - index = data->acpi_data.states[i].control & HW_PSTATE_MASK; - if (index > MAX_HW_PSTATE) { - printk(KERN_ERR PFX "invalid pstate %d - bad value %d.\n", i, index); - printk(KERN_ERR PFX "Please report to BIOS manufacturer\n"); - } - rdmsr(MSR_PSTATE_DEF_BASE + index, lo, hi); - if (!(hi & HW_PSTATE_VALID_MASK)) { - dprintk("invalid pstate %d, ignoring\n", index); - powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID; - continue; - } - - fid = lo & HW_PSTATE_FID_MASK; - did = (lo & HW_PSTATE_DID_MASK) >> HW_PSTATE_DID_SHIFT; - - dprintk(" %d : fid 0x%x, did 0x%x\n", index, fid, did); - - powernow_table[i].index = index | (fid << HW_FID_INDEX_SHIFT) | (did << HW_DID_INDEX_SHIFT); - - powernow_table[i].frequency = find_khz_freq_from_fiddid(fid, did); - - if (powernow_table[i].frequency != (data->acpi_data.states[i].core_frequency * 1000)) { - printk(KERN_INFO PFX "invalid freq entries %u kHz vs. %u kHz\n", - powernow_table[i].frequency, - (unsigned int) (data->acpi_data.states[i].core_frequency * 1000)); - powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID; - continue; - } - } - return 0; -} - -static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpufreq_frequency_table *powernow_table) -{ - int i; - int cntlofreq = 0; - for (i = 0; i < data->acpi_data.state_count; i++) { - u32 fid; - u32 vid; - - if (data->exttype) { - fid = data->acpi_data.states[i].status & EXT_FID_MASK; - vid = (data->acpi_data.states[i].status >> VID_SHIFT) & EXT_VID_MASK; - } else { - fid = data->acpi_data.states[i].control & FID_MASK; - vid = (data->acpi_data.states[i].control >> VID_SHIFT) & VID_MASK; - } - - dprintk(" %d : fid 0x%x, vid 0x%x\n", i, fid, vid); - - powernow_table[i].index = fid; /* lower 8 bits */ - powernow_table[i].index |= (vid << 8); /* upper 8 bits */ - powernow_table[i].frequency = find_khz_freq_from_fid(fid); - - /* verify frequency is OK */ - if ((powernow_table[i].frequency > (MAX_FREQ * 1000)) || - (powernow_table[i].frequency < (MIN_FREQ * 1000))) { - dprintk("invalid freq %u kHz, ignoring\n", powernow_table[i].frequency); - powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID; - continue; - } - - /* verify voltage is OK - BIOSs are using "off" to indicate invalid */ - if (vid == VID_OFF) { - dprintk("invalid vid %u, ignoring\n", vid); - powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID; - continue; - } - - /* verify only 1 entry from the lo frequency table */ - if (fid < HI_FID_TABLE_BOTTOM) { - if (cntlofreq) { - /* if both entries are the same, ignore this one ... */ - if ((powernow_table[i].frequency != powernow_table[cntlofreq].frequency) || - (powernow_table[i].index != powernow_table[cntlofreq].index)) { - printk(KERN_ERR PFX "Too many lo freq table entries\n"); - return 1; - } - - dprintk("double low frequency table entry, ignoring it.\n"); - powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID; - continue; - } else - cntlofreq = i; - } - - if (powernow_table[i].frequency != (data->acpi_data.states[i].core_frequency * 1000)) { - printk(KERN_INFO PFX "invalid freq entries %u kHz vs. %u kHz\n", - powernow_table[i].frequency, - (unsigned int) (data->acpi_data.states[i].core_frequency * 1000)); - powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID; - continue; - } - } - return 0; -} - -static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data) -{ - if (data->acpi_data.state_count) - acpi_processor_unregister_performance(&data->acpi_data, data->cpu); -} - -#else -static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data) { return -ENODEV; } -static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data) { return; } -static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index) { return; } -#endif /* CONFIG_X86_POWERNOW_K8_ACPI */ - -/* Take a frequency, and issue the fid/vid transition command */ -static int transition_frequency_fidvid(struct powernow_k8_data *data, unsigned int index) -{ - u32 fid = 0; - u32 vid = 0; - int res, i; - struct cpufreq_freqs freqs; - - dprintk("cpu %d transition to index %u\n", smp_processor_id(), index); - - /* fid/vid correctness check for k8 */ - /* fid are the lower 8 bits of the index we stored into - * the cpufreq frequency table in find_psb_table, vid - * are the upper 8 bits. - */ - 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; - } - - if ((fid < HI_FID_TABLE_BOTTOM) && (data->currfid < HI_FID_TABLE_BOTTOM)) { - printk(KERN_ERR PFX - "ignoring illegal change in lo freq table-%x to 0x%x\n", - data->currfid, fid); - return 1; - } - - 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); - - for_each_cpu_mask(i, *(data->available_cores)) { - freqs.cpu = i; - cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); - } - - res = transition_fid_vid(data, fid, vid); - freqs.new = find_khz_freq_from_fid(data->currfid); - - for_each_cpu_mask(i, *(data->available_cores)) { - freqs.cpu = i; - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); - } - return res; -} - -/* Take a frequency, and issue the hardware pstate transition command */ -static int transition_frequency_pstate(struct powernow_k8_data *data, unsigned int index) -{ - u32 fid = 0; - u32 did = 0; - u32 pstate = 0; - int res, i; - struct cpufreq_freqs freqs; - - dprintk("cpu %d transition to index %u\n", smp_processor_id(), index); - - /* get fid did for hardware pstate transition */ - pstate = index & HW_PSTATE_MASK; - if (pstate > MAX_HW_PSTATE) - return 0; - fid = (index & HW_FID_INDEX_MASK) >> HW_FID_INDEX_SHIFT; - did = (index & HW_DID_INDEX_MASK) >> HW_DID_INDEX_SHIFT; - freqs.old = find_khz_freq_from_fiddid(data->currfid, data->currdid); - freqs.new = find_khz_freq_from_fiddid(fid, did); - - for_each_cpu_mask(i, *(data->available_cores)) { - freqs.cpu = i; - cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); - } - - res = transition_pstate(data, pstate); - data->currfid = find_fid_from_pstate(pstate); - data->currdid = find_did_from_pstate(pstate); - freqs.new = find_khz_freq_from_fiddid(data->currfid, data->currdid); - - for_each_cpu_mask(i, *(data->available_cores)) { - freqs.cpu = i; - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); - } - return res; -} - -/* Driver entry point to switch to the target frequency */ -static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsigned relation) -{ - cpumask_t oldmask = CPU_MASK_ALL; - struct powernow_k8_data *data = powernow_data[pol->cpu]; - u32 checkfid; - u32 checkvid; - unsigned int newstate; - int ret = -EIO; - - if (!data) - return -EINVAL; - - checkfid = data->currfid; - checkvid = data->currvid; - - /* only run on specific CPU from here on */ - oldmask = current->cpus_allowed; - set_cpus_allowed(current, cpumask_of_cpu(pol->cpu)); - - if (smp_processor_id() != pol->cpu) { - printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu); - 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); - - if (query_current_values_with_pending_wait(data)) - goto err_out; - - if (cpu_family == CPU_HW_PSTATE) - dprintk("targ: curr fid 0x%x, did 0x%x\n", - data->currfid, data->currdid); - else { - dprintk("targ: curr fid 0x%x, vid 0x%x\n", - data->currfid, data->currvid); - - if ((checkvid != data->currvid) || (checkfid != data->currfid)) { - printk(KERN_INFO PFX - "error - out of sync, fix 0x%x 0x%x, vid 0x%x 0x%x\n", - checkfid, data->currfid, checkvid, data->currvid); - } - } - - if (cpufreq_frequency_table_target(pol, data->powernow_table, targfreq, relation, &newstate)) - goto err_out; - - mutex_lock(&fidvid_mutex); - - powernow_k8_acpi_pst_values(data, newstate); - - if (cpu_family == CPU_HW_PSTATE) - ret = transition_frequency_pstate(data, newstate); - else - ret = transition_frequency_fidvid(data, newstate); - if (ret) { - printk(KERN_ERR PFX "transition frequency failed\n"); - ret = 1; - mutex_unlock(&fidvid_mutex); - goto err_out; - } - mutex_unlock(&fidvid_mutex); - - if (cpu_family == CPU_HW_PSTATE) - pol->cur = find_khz_freq_from_fiddid(data->currfid, data->currdid); - else - pol->cur = find_khz_freq_from_fid(data->currfid); - ret = 0; - -err_out: - set_cpus_allowed(current, oldmask); - return ret; -} - -/* Driver entry point to verify the policy and range of frequencies */ -static int powernowk8_verify(struct cpufreq_policy *pol) -{ - struct powernow_k8_data *data = powernow_data[pol->cpu]; - - if (!data) - return -EINVAL; - - return cpufreq_frequency_table_verify(pol, data->powernow_table); -} - -/* per CPU init entry point to the driver */ -static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol) -{ - struct powernow_k8_data *data; - cpumask_t oldmask = CPU_MASK_ALL; - int rc; - - if (!cpu_online(pol->cpu)) - return -ENODEV; - - if (!check_supported_cpu(pol->cpu)) - return -ENODEV; - - data = kzalloc(sizeof(struct powernow_k8_data), GFP_KERNEL); - if (!data) { - printk(KERN_ERR PFX "unable to alloc powernow_k8_data"); - return -ENOMEM; - } - - data->cpu = pol->cpu; - - if (powernow_k8_cpu_init_acpi(data)) { - /* - * Use the PSB BIOS structure. This is only availabe on - * an UP version, and is deprecated by AMD. - */ - if (num_online_cpus() != 1) { - printk(KERN_ERR PFX "MP systems not supported by PSB BIOS structure\n"); - kfree(data); - return -ENODEV; - } - if (pol->cpu != 0) { - printk(KERN_ERR PFX "No _PSS objects for CPU other than CPU0\n"); - kfree(data); - return -ENODEV; - } - rc = find_psb_table(data); - if (rc) { - kfree(data); - return -ENODEV; - } - } - - /* only run on specific CPU from here on */ - oldmask = current->cpus_allowed; - set_cpus_allowed(current, cpumask_of_cpu(pol->cpu)); - - if (smp_processor_id() != pol->cpu) { - printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu); - goto err_out; - } - - if (pending_bit_stuck()) { - printk(KERN_ERR PFX "failing init, change pending bit set\n"); - goto err_out; - } - - if (query_current_values_with_pending_wait(data)) - goto err_out; - - if (cpu_family == CPU_OPTERON) - fidvid_msr_init(); - - /* run on any CPU again */ - set_cpus_allowed(current, oldmask); - - pol->governor = CPUFREQ_DEFAULT_GOVERNOR; - if (cpu_family == CPU_HW_PSTATE) - pol->cpus = cpumask_of_cpu(pol->cpu); - else - pol->cpus = cpu_core_map[pol->cpu]; - data->available_cores = &(pol->cpus); - - /* 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) - + (3 * (1 << data->irt) * 10)) * 1000; - - if (cpu_family == CPU_HW_PSTATE) - pol->cur = find_khz_freq_from_fiddid(data->currfid, data->currdid); - else - pol->cur = find_khz_freq_from_fid(data->currfid); - 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)) { - printk(KERN_ERR PFX "invalid powernow_table\n"); - powernow_k8_cpu_exit_acpi(data); - kfree(data->powernow_table); - kfree(data); - return -EINVAL; - } - - cpufreq_frequency_table_get_attr(data->powernow_table, pol->cpu); - - if (cpu_family == CPU_HW_PSTATE) - dprintk("cpu_init done, current fid 0x%x, did 0x%x\n", - data->currfid, data->currdid); - else - dprintk("cpu_init done, current fid 0x%x, vid 0x%x\n", - data->currfid, data->currvid); - - powernow_data[pol->cpu] = data; - - return 0; - -err_out: - set_cpus_allowed(current, oldmask); - powernow_k8_cpu_exit_acpi(data); - - kfree(data); - return -ENODEV; -} - -static int __devexit powernowk8_cpu_exit (struct cpufreq_policy *pol) -{ - struct powernow_k8_data *data = powernow_data[pol->cpu]; - - 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; -} - -static unsigned int powernowk8_get (unsigned int cpu) -{ - struct powernow_k8_data *data; - cpumask_t oldmask = current->cpus_allowed; - unsigned int khz = 0; - - data = powernow_data[first_cpu(cpu_core_map[cpu])]; - - if (!data) - return -EINVAL; - - set_cpus_allowed(current, cpumask_of_cpu(cpu)); - if (smp_processor_id() != cpu) { - printk(KERN_ERR PFX "limiting to CPU %d failed in powernowk8_get\n", cpu); - set_cpus_allowed(current, oldmask); - return 0; - } - - if (query_current_values_with_pending_wait(data)) - goto out; - - if (cpu_family == CPU_HW_PSTATE) - khz = find_khz_freq_from_fiddid(data->currfid, data->currdid); - else - khz = find_khz_freq_from_fid(data->currfid); - - -out: - set_cpus_allowed(current, oldmask); - return khz; -} - -static struct freq_attr* powernow_k8_attr[] = { - &cpufreq_freq_attr_scaling_available_freqs, - NULL, -}; - -static struct cpufreq_driver cpufreq_amd64_driver = { - .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 */ -static int __cpuinit powernowk8_init(void) -{ - unsigned int i, supported_cpus = 0; - unsigned int booted_cores = 1; - - for_each_online_cpu(i) { - if (check_supported_cpu(i)) - supported_cpus++; - } - -#ifdef CONFIG_SMP - booted_cores = cpu_data[0].booted_cores; -#endif - - if (supported_cpus == num_online_cpus()) { - printk(KERN_INFO PFX "Found %d %s " - "processors (%d cpu cores) (" VERSION ")\n", - supported_cpus/booted_cores, - boot_cpu_data.x86_model_id, supported_cpus); - 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); -} - -MODULE_AUTHOR("Paul Devriendt and Mark Langsdorf "); -MODULE_DESCRIPTION("AMD Athlon 64 and Opteron processor frequency driver."); -MODULE_LICENSE("GPL"); - -late_initcall(powernowk8_init); -module_exit(powernowk8_exit); -- cgit v1.2.3