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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq

Browse Source 
* git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Add missing printk levels to e_powersaver
  [CPUFREQ] Fix sparse warning in powernow-k8
  [CPUFREQ] Support Model D parts and newer in e_powersaver
  [CPUFREQ] Powernow-k8: Update to support the latest Turion processors
  [CPUFREQ] fix configuration help message
  [CPUFREQ] powernow-k8 print pstate instead of fid/did for family 10h
  [CPUFREQ] Eliminate cpufreq_userspace scaling_setspeed deadlock
  [CPUFREQ] gx-suspmod.c: use boot_cpu_data instead of current_cpu_data
  [CPUFREQ] fix incorrect comment on show_available_freqs() in freq_table.c
  [CPUFREQ] drivers/cpufreq: Add missing "space"
  [CPUFREQ] arch/x86: Add missing "space"
  [CPUFREQ] Remove pointless Kconfig dependancy
This commit is contained in:
Linus Torvalds 2008-02-07 09:03:00 -08:00
commit 7a8c6ad918
11 changed files with 97 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kernel/cpu/cpufreq/Kconfig
View File

@ -29,7 +29,7 @@ config X86_ACPI_CPUFREQ
config ELAN_CPUFREQ
tristate "AMD Elan SC400 and SC410"
select CPU_FREQ_TABLE
depends on X86_32 && X86_ELAN
depends on X86_ELAN
---help---
This adds the CPUFreq driver for AMD Elan SC400 and SC410
processors.
@ -45,7 +45,7 @@ config ELAN_CPUFREQ
config SC520_CPUFREQ
tristate "AMD Elan SC520"
select CPU_FREQ_TABLE
depends on X86_32 && X86_ELAN
depends on X86_ELAN
---help---
This adds the CPUFreq driver for AMD Elan SC520 processor.

57
arch/x86/kernel/cpu/cpufreq/e_powersaver.c
View File

@ -23,6 +23,7 @@
#define EPS_BRAND_C7 1
#define EPS_BRAND_EDEN 2
#define EPS_BRAND_C3 3
#define EPS_BRAND_C7D 4
struct eps_cpu_data {
u32 fsb;
@ -54,6 +55,7 @@ static int eps_set_state(struct eps_cpu_data *centaur,
{
struct cpufreq_freqs freqs;
u32 lo, hi;
u8 current_multiplier, current_voltage;
int err = 0;
int i;
@ -93,6 +95,15 @@ postchange:
rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
freqs.new = centaur->fsb * ((lo >> 8) & 0xff);
/* Print voltage and multiplier */
rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
current_voltage = lo & 0xff;
printk(KERN_INFO "eps: Current voltage = %dmV\n",
current_voltage * 16 + 700);
current_multiplier = (lo >> 8) & 0xff;
printk(KERN_INFO "eps: Current multiplier = %d\n",
current_multiplier);
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
return err;
}
@ -141,9 +152,10 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
u8 current_multiplier, current_voltage;
u8 max_multiplier, max_voltage;
u8 min_multiplier, min_voltage;
u8 brand;
u8 brand = 0;
u32 fsb;
struct eps_cpu_data *centaur;
struct cpuinfo_x86 *c = &cpu_data(0);
struct cpufreq_frequency_table *f_table;
int k, step, voltage;
int ret;
@ -153,21 +165,36 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
return -ENODEV;
/* Check brand */
printk("eps: Detected VIA ");
printk(KERN_INFO "eps: Detected VIA ");
switch (c->x86_model) {
case 10:
rdmsr(0x1153, lo, hi);
brand = (((lo >> 2) ^ lo) >> 18) & 3;
printk(KERN_CONT "Model A ");
break;
case 13:
rdmsr(0x1154, lo, hi);
brand = (((lo >> 4) ^ (lo >> 2))) & 0x000000ff;
printk(KERN_CONT "Model D ");
break;
}
switch(brand) {
case EPS_BRAND_C7M:
printk("C7-M\n");
printk(KERN_CONT "C7-M\n");
break;
case EPS_BRAND_C7:
printk("C7\n");
printk(KERN_CONT "C7\n");
break;
case EPS_BRAND_EDEN:
printk("Eden\n");
printk(KERN_CONT "Eden\n");
break;
case EPS_BRAND_C7D:
printk(KERN_CONT "C7-D\n");
break;
case EPS_BRAND_C3:
printk("C3\n");
printk(KERN_CONT "C3\n");
return -ENODEV;
break;
}
@ -179,7 +206,7 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
/* Can be locked at 0 */
rdmsrl(MSR_IA32_MISC_ENABLE, val);
if (!(val & 1 << 16)) {
printk("eps: Can't enable Enhanced PowerSaver\n");
printk(KERN_INFO "eps: Can't enable Enhanced PowerSaver\n");
return -ENODEV;
}
}
@ -187,19 +214,19 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
/* Print voltage and multiplier */
rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
current_voltage = lo & 0xff;
printk("eps: Current voltage = %dmV\n", current_voltage * 16 + 700);
printk(KERN_INFO "eps: Current voltage = %dmV\n", current_voltage * 16 + 700);
current_multiplier = (lo >> 8) & 0xff;
printk("eps: Current multiplier = %d\n", current_multiplier);
printk(KERN_INFO "eps: Current multiplier = %d\n", current_multiplier);
/* Print limits */
max_voltage = hi & 0xff;
printk("eps: Highest voltage = %dmV\n", max_voltage * 16 + 700);
printk(KERN_INFO "eps: Highest voltage = %dmV\n", max_voltage * 16 + 700);
max_multiplier = (hi >> 8) & 0xff;
printk("eps: Highest multiplier = %d\n", max_multiplier);
printk(KERN_INFO "eps: Highest multiplier = %d\n", max_multiplier);
min_voltage = (hi >> 16) & 0xff;
printk("eps: Lowest voltage = %dmV\n", min_voltage * 16 + 700);
printk(KERN_INFO "eps: Lowest voltage = %dmV\n", min_voltage * 16 + 700);
min_multiplier = (hi >> 24) & 0xff;
printk("eps: Lowest multiplier = %d\n", min_multiplier);
printk(KERN_INFO "eps: Lowest multiplier = %d\n", min_multiplier);
/* Sanity checks */
if (current_multiplier == 0 || max_multiplier == 0
@ -208,7 +235,7 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
if (current_multiplier > max_multiplier
|| max_multiplier <= min_multiplier)
return -EINVAL;
if (current_voltage > 0x1c || max_voltage > 0x1c)
if (current_voltage > 0x1f || max_voltage > 0x1f)
return -EINVAL;
if (max_voltage < min_voltage)
return -EINVAL;
@ -310,7 +337,7 @@ static int __init eps_init(void)
/* This driver will work only on Centaur C7 processors with
* Enhanced SpeedStep/PowerSaver registers */
if (c->x86_vendor != X86_VENDOR_CENTAUR
|| c->x86 != 6 || c->x86_model != 10)
|| c->x86 != 6 || c->x86_model < 10)
return -ENODEV;
if (!cpu_has(c, X86_FEATURE_EST))
return -ENODEV;

4
arch/x86/kernel/cpu/cpufreq/gx-suspmod.c
View File

@ -181,8 +181,8 @@ static __init struct pci_dev *gx_detect_chipset(void)
struct pci_dev *gx_pci = NULL;
/* check if CPU is a MediaGX or a Geode. */
if ((current_cpu_data.x86_vendor != X86_VENDOR_NSC) &&
(current_cpu_data.x86_vendor != X86_VENDOR_CYRIX)) {
if ((boot_cpu_data.x86_vendor != X86_VENDOR_NSC) &&
(boot_cpu_data.x86_vendor != X86_VENDOR_CYRIX)) {
dprintk("error: no MediaGX/Geode processor found!\n");
return NULL;
}

2
arch/x86/kernel/cpu/cpufreq/powernow-k7.c
View File

@ -460,7 +460,7 @@ static int powernow_decode_bios (int maxfid, int startvid)
latency = psb->settlingtime;
if (latency < 100) {
printk (KERN_INFO PFX "BIOS set settling time to %d microseconds."
printk(KERN_INFO PFX "BIOS set settling time to %d microseconds. "
"Should be at least 100. Correcting.\n", latency);
latency = 100;
}

9
arch/x86/kernel/cpu/cpufreq/powernow-k8.c
View File

@ -578,10 +578,9 @@ static void print_basics(struct powernow_k8_data *data)
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",
printk(KERN_INFO PFX " %d : pstate %d (%d MHz)\n",
j,
(data->powernow_table[j].index & 0xff00) >> 8,
(data->powernow_table[j].index & 0xff0000) >> 16,
data->powernow_table[j].index,
data->powernow_table[j].frequency/1000);
} else {
printk(KERN_INFO PFX " %d : fid 0x%x (%d MHz), vid 0x%x\n",
@ -1235,8 +1234,10 @@ static unsigned int powernowk8_get (unsigned int cpu)
struct powernow_k8_data *data;
cpumask_t oldmask = current->cpus_allowed;
unsigned int khz = 0;
unsigned int first;
data = per_cpu(powernow_data, first_cpu(per_cpu(cpu_core_map, cpu)));
first = first_cpu(per_cpu(cpu_core_map, cpu));
data = per_cpu(powernow_data, first);
if (!data)
return -EINVAL;

2
arch/x86/kernel/cpu/cpufreq/powernow-k8.h
View File

@ -47,7 +47,7 @@ struct powernow_k8_data {
#define CPUID_XFAM 0x0ff00000 /* extended family */
#define CPUID_XFAM_K8 0
#define CPUID_XMOD 0x000f0000 /* extended model */
#define CPUID_XMOD_REV_MASK 0x00080000
#define CPUID_XMOD_REV_MASK 0x000c0000
#define CPUID_XFAM_10H 0x00100000 /* family 0x10 */
#define CPUID_USE_XFAM_XMOD 0x00000f00
#define CPUID_GET_MAX_CAPABILITIES 0x80000000

3
drivers/cpufreq/Kconfig
View File

@ -9,9 +9,6 @@ config CPU_FREQ
clock speed, you need to either enable a dynamic cpufreq governor
(see below) after boot, or use a userspace tool.
To compile this driver as a module, choose M here: the
module will be called cpufreq.
For details, take a look at <file:Documentation/cpu-freq>.
If in doubt, say N.

33
drivers/cpufreq/cpufreq.c
View File

@ -287,7 +287,7 @@ static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
if (!l_p_j_ref_freq) {
l_p_j_ref = loops_per_jiffy;
l_p_j_ref_freq = ci->old;
dprintk("saving %lu as reference value for loops_per_jiffy;"
dprintk("saving %lu as reference value for loops_per_jiffy; "
"freq is %u kHz\n", l_p_j_ref, l_p_j_ref_freq);
}
if ((val == CPUFREQ_PRECHANGE && ci->old < ci->new) ||
@ -295,7 +295,7 @@ static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
(val == CPUFREQ_RESUMECHANGE || val == CPUFREQ_SUSPENDCHANGE)) {
loops_per_jiffy = cpufreq_scale(l_p_j_ref, l_p_j_ref_freq,
ci->new);
dprintk("scaling loops_per_jiffy to %lu"
dprintk("scaling loops_per_jiffy to %lu "
"for frequency %u kHz\n", loops_per_jiffy, ci->new);
}
}
@ -601,6 +601,31 @@ static ssize_t show_affected_cpus (struct cpufreq_policy * policy, char *buf)
return i;
}
static ssize_t store_scaling_setspeed(struct cpufreq_policy *policy,
const char *buf, size_t count)
{
unsigned int freq = 0;
unsigned int ret;
if (!policy->governor->store_setspeed)
return -EINVAL;
ret = sscanf(buf, "%u", &freq);
if (ret != 1)
return -EINVAL;
policy->governor->store_setspeed(policy, freq);
return count;
}
static ssize_t show_scaling_setspeed(struct cpufreq_policy *policy, char *buf)
{
if (!policy->governor->show_setspeed)
return sprintf(buf, "<unsupported>\n");
return policy->governor->show_setspeed(policy, buf);
}
#define define_one_ro(_name) \
static struct freq_attr _name = \
@ -624,6 +649,7 @@ define_one_ro(affected_cpus);
define_one_rw(scaling_min_freq);
define_one_rw(scaling_max_freq);
define_one_rw(scaling_governor);
define_one_rw(scaling_setspeed);
static struct attribute * default_attrs[] = {
&cpuinfo_min_freq.attr,
@ -634,6 +660,7 @@ static struct attribute * default_attrs[] = {
&scaling_governor.attr,
&scaling_driver.attr,
&scaling_available_governors.attr,
&scaling_setspeed.attr,
NULL
};
@ -1313,7 +1340,7 @@ static int cpufreq_resume(struct sys_device * sysdev)
struct cpufreq_freqs freqs;
if (!(cpufreq_driver->flags & CPUFREQ_PM_NO_WARN))
dprintk("Warning: CPU frequency"
dprintk("Warning: CPU frequency "
"is %u, cpufreq assumed %u kHz.\n",
cur_freq, cpu_policy->cur);

40
drivers/cpufreq/cpufreq_userspace.c
View File

@ -65,12 +65,12 @@ static struct notifier_block userspace_cpufreq_notifier_block = {
/**
* cpufreq_set - set the CPU frequency
* @policy: pointer to policy struct where freq is being set
* @freq: target frequency in kHz
* @cpu: CPU for which the frequency is to be set
*
* Sets the CPU frequency to freq.
*/
static int cpufreq_set(unsigned int freq, struct cpufreq_policy *policy)
static int cpufreq_set(struct cpufreq_policy *policy, unsigned int freq)
{
int ret = -EINVAL;
@ -102,34 +102,11 @@ static int cpufreq_set(unsigned int freq, struct cpufreq_policy *policy)
}
/************************** sysfs interface ************************/
static ssize_t show_speed (struct cpufreq_policy *policy, char *buf)
static ssize_t show_speed(struct cpufreq_policy *policy, char *buf)
{
return sprintf (buf, "%u\n", cpu_cur_freq[policy->cpu]);
return sprintf(buf, "%u\n", cpu_cur_freq[policy->cpu]);
}
static ssize_t
store_speed (struct cpufreq_policy *policy, const char *buf, size_t count)
{
unsigned int freq = 0;
unsigned int ret;
ret = sscanf (buf, "%u", &freq);
if (ret != 1)
return -EINVAL;
cpufreq_set(freq, policy);
return count;
}
static struct freq_attr freq_attr_scaling_setspeed =
{
.attr = { .name = "scaling_setspeed", .mode = 0644 },
.show = show_speed,
.store = store_speed,
};
static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
unsigned int event)
{
@ -142,10 +119,6 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
return -EINVAL;
BUG_ON(!policy->cur);
mutex_lock(&userspace_mutex);
rc = sysfs_create_file (&policy->kobj,
&freq_attr_scaling_setspeed.attr);
if (rc)
goto start_out;
if (cpus_using_userspace_governor == 0) {
cpufreq_register_notifier(
@ -160,7 +133,7 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
cpu_cur_freq[cpu] = policy->cur;
cpu_set_freq[cpu] = policy->cur;
dprintk("managing cpu %u started (%u - %u kHz, currently %u kHz)\n", cpu, cpu_min_freq[cpu], cpu_max_freq[cpu], cpu_cur_freq[cpu]);
start_out:
mutex_unlock(&userspace_mutex);
break;
case CPUFREQ_GOV_STOP:
@ -176,7 +149,6 @@ start_out:
cpu_min_freq[cpu] = 0;
cpu_max_freq[cpu] = 0;
cpu_set_freq[cpu] = 0;
sysfs_remove_file (&policy->kobj, &freq_attr_scaling_setspeed.attr);
dprintk("managing cpu %u stopped\n", cpu);
mutex_unlock(&userspace_mutex);
break;
@ -211,6 +183,8 @@ start_out:
struct cpufreq_governor cpufreq_gov_userspace = {
.name = "userspace",
.governor = cpufreq_governor_userspace,
.store_setspeed = cpufreq_set,
.show_setspeed = show_speed,
.owner = THIS_MODULE,
};
EXPORT_SYMBOL(cpufreq_gov_userspace);

2
drivers/cpufreq/freq_table.c
View File

@ -171,7 +171,7 @@ EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
static struct cpufreq_frequency_table *show_table[NR_CPUS];
/**
* show_scaling_governor - show the current policy for the specified CPU
* show_available_freqs - show available frequencies for the specified CPU
*/
static ssize_t show_available_freqs (struct cpufreq_policy *policy, char *buf)
{

4
include/linux/cpufreq.h
View File

@ -167,6 +167,10 @@ struct cpufreq_governor {
char name[CPUFREQ_NAME_LEN];
int (*governor) (struct cpufreq_policy *policy,
unsigned int event);
ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
char *buf);
int (*store_setspeed) (struct cpufreq_policy *policy,
unsigned int freq);
unsigned int max_transition_latency; /* HW must be able to switch to
next freq faster than this value in nano secs or we
will fallback to performance governor */