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[CPUFREQ] checkpatch cleanups for powernow-k7
The asm/timer.h warning can be ignored, it's needed for recalibrate_cpu_khz() Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Dave Jones
parent
bbfebd6655
commit
b9e7638a30
1 changed files with 137 additions and 100 deletions
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@ -6,10 +6,12 @@
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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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* Errata 5: Processor may fail to execute a FID/VID change in presence of interrupt.
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* - We cli/sti on stepping A0 CPUs around the FID/VID transition.
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* Errata 15: Processors with half frequency multipliers may hang upon wakeup from disconnect.
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* - We disable half multipliers if ACPI is used on A0 stepping CPUs.
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* Errata 5:
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* CPU may fail to execute a FID/VID change in presence of interrupt.
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* - We cli/sti on stepping A0 CPUs around the FID/VID transition.
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* Errata 15:
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* CPU with half frequency multipliers may hang upon wakeup from disconnect.
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* - We disable half multipliers if ACPI is used on A0 stepping CPUs.
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*/
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#include <linux/kernel.h>
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@ -20,11 +22,11 @@
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/dmi.h>
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#include <linux/timex.h>
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#include <linux/io.h>
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#include <asm/timer.h> /* Needed for recalibrate_cpu_khz() */
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#include <asm/msr.h>
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#include <asm/timer.h>
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#include <asm/timex.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#ifdef CONFIG_X86_POWERNOW_K7_ACPI
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@ -58,9 +60,9 @@ struct pst_s {
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union powernow_acpi_control_t {
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struct {
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unsigned long fid:5,
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vid:5,
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sgtc:20,
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res1:2;
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vid:5,
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sgtc:20,
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res1:2;
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} bits;
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unsigned long val;
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};
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@ -101,7 +103,8 @@ static unsigned int fsb;
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static unsigned int latency;
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static char have_a0;
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#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "powernow-k7", msg)
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#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, \
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"powernow-k7", msg)
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static int check_fsb(unsigned int fsbspeed)
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{
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@ -109,7 +112,7 @@ static int check_fsb(unsigned int fsbspeed)
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unsigned int f = fsb / 1000;
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delta = (fsbspeed > f) ? fsbspeed - f : f - fsbspeed;
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return (delta < 5);
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return delta < 5;
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}
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static int check_powernow(void)
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@ -117,24 +120,26 @@ static int check_powernow(void)
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struct cpuinfo_x86 *c = &cpu_data(0);
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unsigned int maxei, eax, ebx, ecx, edx;
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if ((c->x86_vendor != X86_VENDOR_AMD) || (c->x86 !=6)) {
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if ((c->x86_vendor != X86_VENDOR_AMD) || (c->x86 != 6)) {
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#ifdef MODULE
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printk (KERN_INFO PFX "This module only works with AMD K7 CPUs\n");
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printk(KERN_INFO PFX "This module only works with "
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"AMD K7 CPUs\n");
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#endif
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return 0;
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}
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/* Get maximum capabilities */
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maxei = cpuid_eax (0x80000000);
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maxei = cpuid_eax(0x80000000);
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if (maxei < 0x80000007) { /* Any powernow info ? */
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#ifdef MODULE
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printk (KERN_INFO PFX "No powernow capabilities detected\n");
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printk(KERN_INFO PFX "No powernow capabilities detected\n");
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#endif
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return 0;
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}
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if ((c->x86_model == 6) && (c->x86_mask == 0)) {
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printk (KERN_INFO PFX "K7 660[A0] core detected, enabling errata workarounds\n");
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printk(KERN_INFO PFX "K7 660[A0] core detected, "
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"enabling errata workarounds\n");
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have_a0 = 1;
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}
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@ -144,37 +149,42 @@ static int check_powernow(void)
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if (!(edx & (1 << 1 | 1 << 2)))
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return 0;
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printk (KERN_INFO PFX "PowerNOW! Technology present. Can scale: ");
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printk(KERN_INFO PFX "PowerNOW! Technology present. Can scale: ");
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if (edx & 1 << 1) {
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printk ("frequency");
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can_scale_bus=1;
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printk("frequency");
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can_scale_bus = 1;
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}
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if ((edx & (1 << 1 | 1 << 2)) == 0x6)
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printk (" and ");
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printk(" and ");
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if (edx & 1 << 2) {
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printk ("voltage");
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can_scale_vid=1;
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printk("voltage");
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can_scale_vid = 1;
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}
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printk (".\n");
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printk(".\n");
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return 1;
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}
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static void invalidate_entry(unsigned int entry)
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{
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powernow_table[entry].frequency = CPUFREQ_ENTRY_INVALID;
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}
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static int get_ranges (unsigned char *pst)
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static int get_ranges(unsigned char *pst)
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{
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unsigned int j;
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unsigned int speed;
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u8 fid, vid;
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powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) * (number_scales + 1)), GFP_KERNEL);
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powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) *
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(number_scales + 1)), GFP_KERNEL);
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if (!powernow_table)
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return -ENOMEM;
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for (j=0 ; j < number_scales; j++) {
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for (j = 0 ; j < number_scales; j++) {
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fid = *pst++;
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powernow_table[j].frequency = (fsb * fid_codes[fid]) / 10;
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@ -182,10 +192,10 @@ static int get_ranges (unsigned char *pst)
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speed = powernow_table[j].frequency;
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if ((fid_codes[fid] % 10)==5) {
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if ((fid_codes[fid] % 10) == 5) {
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#ifdef CONFIG_X86_POWERNOW_K7_ACPI
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if (have_a0 == 1)
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powernow_table[j].frequency = CPUFREQ_ENTRY_INVALID;
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invalidate_entry(j);
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#endif
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}
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@ -197,7 +207,7 @@ static int get_ranges (unsigned char *pst)
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vid = *pst++;
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powernow_table[j].index |= (vid << 8); /* upper 8 bits */
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dprintk (" FID: 0x%x (%d.%dx [%dMHz]) "
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dprintk(" FID: 0x%x (%d.%dx [%dMHz]) "
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"VID: 0x%x (%d.%03dV)\n", fid, fid_codes[fid] / 10,
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fid_codes[fid] % 10, speed/1000, vid,
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mobile_vid_table[vid]/1000,
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@ -214,13 +224,13 @@ static void change_FID(int fid)
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{
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union msr_fidvidctl fidvidctl;
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rdmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
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rdmsrl(MSR_K7_FID_VID_CTL, fidvidctl.val);
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if (fidvidctl.bits.FID != fid) {
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fidvidctl.bits.SGTC = latency;
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fidvidctl.bits.FID = fid;
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fidvidctl.bits.VIDC = 0;
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fidvidctl.bits.FIDC = 1;
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wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
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wrmsrl(MSR_K7_FID_VID_CTL, fidvidctl.val);
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}
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}
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@ -229,18 +239,18 @@ static void change_VID(int vid)
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{
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union msr_fidvidctl fidvidctl;
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rdmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
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rdmsrl(MSR_K7_FID_VID_CTL, fidvidctl.val);
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if (fidvidctl.bits.VID != vid) {
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fidvidctl.bits.SGTC = latency;
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fidvidctl.bits.VID = vid;
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fidvidctl.bits.FIDC = 0;
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fidvidctl.bits.VIDC = 1;
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wrmsrl (MSR_K7_FID_VID_CTL, fidvidctl.val);
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wrmsrl(MSR_K7_FID_VID_CTL, fidvidctl.val);
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}
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}
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static void change_speed (unsigned int index)
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static void change_speed(unsigned int index)
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{
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u8 fid, vid;
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struct cpufreq_freqs freqs;
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@ -257,7 +267,7 @@ static void change_speed (unsigned int index)
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freqs.cpu = 0;
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rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
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rdmsrl(MSR_K7_FID_VID_STATUS, fidvidstatus.val);
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cfid = fidvidstatus.bits.CFID;
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freqs.old = fsb * fid_codes[cfid] / 10;
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@ -321,12 +331,14 @@ static int powernow_acpi_init(void)
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goto err1;
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}
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if (acpi_processor_perf->control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) {
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if (acpi_processor_perf->control_register.space_id !=
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ACPI_ADR_SPACE_FIXED_HARDWARE) {
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retval = -ENODEV;
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goto err2;
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}
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if (acpi_processor_perf->status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) {
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if (acpi_processor_perf->status_register.space_id !=
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ACPI_ADR_SPACE_FIXED_HARDWARE) {
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retval = -ENODEV;
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goto err2;
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}
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@ -338,7 +350,8 @@ static int powernow_acpi_init(void)
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goto err2;
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}
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powernow_table = kzalloc((number_scales + 1) * (sizeof(struct cpufreq_frequency_table)), GFP_KERNEL);
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powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) *
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(number_scales + 1)), GFP_KERNEL);
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if (!powernow_table) {
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retval = -ENOMEM;
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goto err2;
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@ -352,7 +365,7 @@ static int powernow_acpi_init(void)
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unsigned int speed, speed_mhz;
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pc.val = (unsigned long) state->control;
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dprintk ("acpi: P%d: %d MHz %d mW %d uS control %08x SGTC %d\n",
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dprintk("acpi: P%d: %d MHz %d mW %d uS control %08x SGTC %d\n",
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i,
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(u32) state->core_frequency,
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(u32) state->power,
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@ -381,12 +394,12 @@ static int powernow_acpi_init(void)
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if (speed % 1000 > 0)
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speed_mhz++;
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if ((fid_codes[fid] % 10)==5) {
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if ((fid_codes[fid] % 10) == 5) {
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if (have_a0 == 1)
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powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
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invalidate_entry(i);
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}
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dprintk (" FID: 0x%x (%d.%dx [%dMHz]) "
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dprintk(" FID: 0x%x (%d.%dx [%dMHz]) "
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"VID: 0x%x (%d.%03dV)\n", fid, fid_codes[fid] / 10,
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fid_codes[fid] % 10, speed_mhz, vid,
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mobile_vid_table[vid]/1000,
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@ -422,7 +435,8 @@ err1:
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err05:
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kfree(acpi_processor_perf);
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err0:
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printk(KERN_WARNING PFX "ACPI perflib can not be used in this platform\n");
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printk(KERN_WARNING PFX "ACPI perflib can not be used on "
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"this platform\n");
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acpi_processor_perf = NULL;
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return retval;
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}
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@ -435,7 +449,14 @@ static int powernow_acpi_init(void)
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}
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#endif
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static int powernow_decode_bios (int maxfid, int startvid)
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static void print_pst_entry(struct pst_s *pst, unsigned int j)
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{
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dprintk("PST:%d (@%p)\n", j, pst);
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dprintk(" cpuid: 0x%x fsb: %d maxFID: 0x%x startvid: 0x%x\n",
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pst->cpuid, pst->fsbspeed, pst->maxfid, pst->startvid);
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}
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static int powernow_decode_bios(int maxfid, int startvid)
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{
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struct psb_s *psb;
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struct pst_s *pst;
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@ -446,61 +467,67 @@ static int powernow_decode_bios (int maxfid, int startvid)
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etuple = cpuid_eax(0x80000001);
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for (i=0xC0000; i < 0xffff0 ; i+=16) {
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for (i = 0xC0000; i < 0xffff0 ; i += 16) {
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p = phys_to_virt(i);
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if (memcmp(p, "AMDK7PNOW!", 10) == 0){
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dprintk ("Found PSB header at %p\n", p);
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if (memcmp(p, "AMDK7PNOW!", 10) == 0) {
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dprintk("Found PSB header at %p\n", p);
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psb = (struct psb_s *) p;
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dprintk ("Table version: 0x%x\n", psb->tableversion);
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dprintk("Table version: 0x%x\n", psb->tableversion);
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if (psb->tableversion != 0x12) {
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printk (KERN_INFO PFX "Sorry, only v1.2 tables supported right now\n");
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printk(KERN_INFO PFX "Sorry, only v1.2 tables"
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" supported right now\n");
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return -ENODEV;
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}
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dprintk ("Flags: 0x%x\n", psb->flags);
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if ((psb->flags & 1)==0) {
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dprintk ("Mobile voltage regulator\n");
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} else {
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dprintk ("Desktop voltage regulator\n");
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}
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dprintk("Flags: 0x%x\n", psb->flags);
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if ((psb->flags & 1) == 0)
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dprintk("Mobile voltage regulator\n");
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else
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dprintk("Desktop voltage regulator\n");
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latency = psb->settlingtime;
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if (latency < 100) {
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printk(KERN_INFO PFX "BIOS set settling time to %d microseconds. "
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"Should be at least 100. Correcting.\n", latency);
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printk(KERN_INFO PFX "BIOS set settling time "
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"to %d microseconds. "
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"Should be at least 100. "
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"Correcting.\n", latency);
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latency = 100;
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}
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dprintk ("Settling Time: %d microseconds.\n", psb->settlingtime);
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dprintk ("Has %d PST tables. (Only dumping ones relevant to this CPU).\n", psb->numpst);
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dprintk("Settling Time: %d microseconds.\n",
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psb->settlingtime);
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dprintk("Has %d PST tables. (Only dumping ones "
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"relevant to this CPU).\n",
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psb->numpst);
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p += sizeof (struct psb_s);
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p += sizeof(struct psb_s);
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pst = (struct pst_s *) p;
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for (j=0; j<psb->numpst; j++) {
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for (j = 0; j < psb->numpst; j++) {
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pst = (struct pst_s *) p;
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number_scales = pst->numpstates;
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if ((etuple == pst->cpuid) && check_fsb(pst->fsbspeed) &&
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(maxfid==pst->maxfid) && (startvid==pst->startvid))
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{
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dprintk ("PST:%d (@%p)\n", j, pst);
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dprintk (" cpuid: 0x%x fsb: %d maxFID: 0x%x startvid: 0x%x\n",
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pst->cpuid, pst->fsbspeed, pst->maxfid, pst->startvid);
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ret = get_ranges ((char *) pst + sizeof (struct pst_s));
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if ((etuple == pst->cpuid) &&
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check_fsb(pst->fsbspeed) &&
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(maxfid == pst->maxfid) &&
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(startvid == pst->startvid)) {
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print_pst_entry(pst, j);
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p = (char *)pst + sizeof(struct pst_s);
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ret = get_ranges(p);
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return ret;
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} else {
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unsigned int k;
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p = (char *) pst + sizeof (struct pst_s);
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for (k=0; k<number_scales; k++)
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p+=2;
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p = (char *)pst + sizeof(struct pst_s);
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for (k = 0; k < number_scales; k++)
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p += 2;
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}
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}
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printk (KERN_INFO PFX "No PST tables match this cpuid (0x%x)\n", etuple);
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printk (KERN_INFO PFX "This is indicative of a broken BIOS.\n");
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printk(KERN_INFO PFX "No PST tables match this cpuid "
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"(0x%x)\n", etuple);
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printk(KERN_INFO PFX "This is indicative of a broken "
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"BIOS.\n");
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return -EINVAL;
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}
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@ -511,13 +538,14 @@ static int powernow_decode_bios (int maxfid, int startvid)
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}
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static int powernow_target (struct cpufreq_policy *policy,
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static int powernow_target(struct cpufreq_policy *policy,
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unsigned int target_freq,
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unsigned int relation)
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{
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unsigned int newstate;
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if (cpufreq_frequency_table_target(policy, powernow_table, target_freq, relation, &newstate))
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if (cpufreq_frequency_table_target(policy, powernow_table, target_freq,
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relation, &newstate))
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return -EINVAL;
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change_speed(newstate);
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@ -526,7 +554,7 @@ static int powernow_target (struct cpufreq_policy *policy,
|
|||
}
|
||||
|
||||
|
||||
static int powernow_verify (struct cpufreq_policy *policy)
|
||||
static int powernow_verify(struct cpufreq_policy *policy)
|
||||
{
|
||||
return cpufreq_frequency_table_verify(policy, powernow_table);
|
||||
}
|
||||
|
|
@ -566,18 +594,23 @@ static unsigned int powernow_get(unsigned int cpu)
|
|||
|
||||
if (cpu)
|
||||
return 0;
|
||||
rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
|
||||
rdmsrl(MSR_K7_FID_VID_STATUS, fidvidstatus.val);
|
||||
cfid = fidvidstatus.bits.CFID;
|
||||
|
||||
return (fsb * fid_codes[cfid] / 10);
|
||||
return fsb * fid_codes[cfid] / 10;
|
||||
}
|
||||
|
||||
|
||||
static int __init acer_cpufreq_pst(const struct dmi_system_id *d)
|
||||
{
|
||||
printk(KERN_WARNING "%s laptop with broken PST tables in BIOS detected.\n", d->ident);
|
||||
printk(KERN_WARNING "You need to downgrade to 3A21 (09/09/2002), or try a newer BIOS than 3A71 (01/20/2003)\n");
|
||||
printk(KERN_WARNING "cpufreq scaling has been disabled as a result of this.\n");
|
||||
printk(KERN_WARNING PFX
|
||||
"%s laptop with broken PST tables in BIOS detected.\n",
|
||||
d->ident);
|
||||
printk(KERN_WARNING PFX
|
||||
"You need to downgrade to 3A21 (09/09/2002), or try a newer "
|
||||
"BIOS than 3A71 (01/20/2003)\n");
|
||||
printk(KERN_WARNING PFX
|
||||
"cpufreq scaling has been disabled as a result of this.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -598,7 +631,7 @@ static struct dmi_system_id __initdata powernow_dmi_table[] = {
|
|||
{ }
|
||||
};
|
||||
|
||||
static int __init powernow_cpu_init (struct cpufreq_policy *policy)
|
||||
static int __init powernow_cpu_init(struct cpufreq_policy *policy)
|
||||
{
|
||||
union msr_fidvidstatus fidvidstatus;
|
||||
int result;
|
||||
|
|
@ -606,7 +639,7 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
|
|||
if (policy->cpu != 0)
|
||||
return -ENODEV;
|
||||
|
||||
rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
|
||||
rdmsrl(MSR_K7_FID_VID_STATUS, fidvidstatus.val);
|
||||
|
||||
recalibrate_cpu_khz();
|
||||
|
||||
|
|
@ -618,19 +651,21 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
|
|||
dprintk("FSB: %3dMHz\n", fsb/1000);
|
||||
|
||||
if (dmi_check_system(powernow_dmi_table) || acpi_force) {
|
||||
printk (KERN_INFO PFX "PSB/PST known to be broken. Trying ACPI instead\n");
|
||||
printk(KERN_INFO PFX "PSB/PST known to be broken. "
|
||||
"Trying ACPI instead\n");
|
||||
result = powernow_acpi_init();
|
||||
} else {
|
||||
result = powernow_decode_bios(fidvidstatus.bits.MFID, fidvidstatus.bits.SVID);
|
||||
result = powernow_decode_bios(fidvidstatus.bits.MFID,
|
||||
fidvidstatus.bits.SVID);
|
||||
if (result) {
|
||||
printk (KERN_INFO PFX "Trying ACPI perflib\n");
|
||||
printk(KERN_INFO PFX "Trying ACPI perflib\n");
|
||||
maximum_speed = 0;
|
||||
minimum_speed = -1;
|
||||
latency = 0;
|
||||
result = powernow_acpi_init();
|
||||
if (result) {
|
||||
printk (KERN_INFO PFX "ACPI and legacy methods failed\n");
|
||||
printk (KERN_INFO PFX "See http://www.codemonkey.org.uk/projects/cpufreq/powernow-k7.html\n");
|
||||
printk(KERN_INFO PFX
|
||||
"ACPI and legacy methods failed\n");
|
||||
}
|
||||
} else {
|
||||
/* SGTC use the bus clock as timer */
|
||||
|
|
@ -642,10 +677,11 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
|
|||
if (result)
|
||||
return result;
|
||||
|
||||
printk (KERN_INFO PFX "Minimum speed %d MHz. Maximum speed %d MHz.\n",
|
||||
printk(KERN_INFO PFX "Minimum speed %d MHz. Maximum speed %d MHz.\n",
|
||||
minimum_speed/1000, maximum_speed/1000);
|
||||
|
||||
policy->cpuinfo.transition_latency = cpufreq_scale(2000000UL, fsb, latency);
|
||||
policy->cpuinfo.transition_latency =
|
||||
cpufreq_scale(2000000UL, fsb, latency);
|
||||
|
||||
policy->cur = powernow_get(0);
|
||||
|
||||
|
|
@ -654,7 +690,8 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
|
|||
return cpufreq_frequency_table_cpuinfo(policy, powernow_table);
|
||||
}
|
||||
|
||||
static int powernow_cpu_exit (struct cpufreq_policy *policy) {
|
||||
static int powernow_cpu_exit(struct cpufreq_policy *policy)
|
||||
{
|
||||
cpufreq_frequency_table_put_attr(policy->cpu);
|
||||
|
||||
#ifdef CONFIG_X86_POWERNOW_K7_ACPI
|
||||
|
|
@ -669,7 +706,7 @@ static int powernow_cpu_exit (struct cpufreq_policy *policy) {
|
|||
return 0;
|
||||
}
|
||||
|
||||
static struct freq_attr* powernow_table_attr[] = {
|
||||
static struct freq_attr *powernow_table_attr[] = {
|
||||
&cpufreq_freq_attr_scaling_available_freqs,
|
||||
NULL,
|
||||
};
|
||||
|
|
@ -685,15 +722,15 @@ static struct cpufreq_driver powernow_driver = {
|
|||
.attr = powernow_table_attr,
|
||||
};
|
||||
|
||||
static int __init powernow_init (void)
|
||||
static int __init powernow_init(void)
|
||||
{
|
||||
if (check_powernow()==0)
|
||||
if (check_powernow() == 0)
|
||||
return -ENODEV;
|
||||
return cpufreq_register_driver(&powernow_driver);
|
||||
}
|
||||
|
||||
|
||||
static void __exit powernow_exit (void)
|
||||
static void __exit powernow_exit(void)
|
||||
{
|
||||
cpufreq_unregister_driver(&powernow_driver);
|
||||
}
|
||||
|
|
@ -701,9 +738,9 @@ static void __exit powernow_exit (void)
|
|||
module_param(acpi_force, int, 0444);
|
||||
MODULE_PARM_DESC(acpi_force, "Force ACPI to be used.");
|
||||
|
||||
MODULE_AUTHOR ("Dave Jones <davej@redhat.com>");
|
||||
MODULE_DESCRIPTION ("Powernow driver for AMD K7 processors.");
|
||||
MODULE_LICENSE ("GPL");
|
||||
MODULE_AUTHOR("Dave Jones <davej@redhat.com>");
|
||||
MODULE_DESCRIPTION("Powernow driver for AMD K7 processors.");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
late_initcall(powernow_init);
|
||||
module_exit(powernow_exit);
|
||||
|
|
|
|||
Loading…
Reference in a new issue