MODULE_DESCRIPTION("ACPI Processor P-States Driver");
MODULE_LICENSE("GPL");
-
enum {
UNDEFINED_CAPABLE = 0,
SYSTEM_INTEL_MSR_CAPABLE,
#define INTEL_MSR_RANGE (0xffff)
struct acpi_cpufreq_data {
- struct acpi_processor_performance *acpi_data;
- struct cpufreq_frequency_table *freq_table;
- unsigned int resume;
- unsigned int cpu_feature;
+ struct acpi_processor_performance *acpi_data;
+ struct cpufreq_frequency_table *freq_table;
+ unsigned int resume;
+ unsigned int cpu_feature;
};
-static struct acpi_cpufreq_data *drv_data[NR_CPUS];
-static struct acpi_processor_performance *acpi_perf_data[NR_CPUS];
+static struct acpi_cpufreq_data *drv_data[NR_CPUS];
+static struct acpi_processor_performance *acpi_perf_data[NR_CPUS];
static struct cpufreq_driver acpi_cpufreq_driver;
static unsigned int acpi_pstate_strict;
-
static int check_est_cpu(unsigned int cpuid)
{
struct cpuinfo_x86 *cpu = &cpu_data[cpuid];
if (cpu->x86_vendor != X86_VENDOR_INTEL ||
- !cpu_has(cpu, X86_FEATURE_EST))
+ !cpu_has(cpu, X86_FEATURE_EST))
return 0;
return 1;
}
-
static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
{
- struct acpi_processor_performance *perf;
- int i;
+ struct acpi_processor_performance *perf;
+ int i;
perf = data->acpi_data;
return 0;
}
-
static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
{
int i;
return data->freq_table[0].frequency;
}
-
static unsigned extract_freq(u32 val, struct acpi_cpufreq_data *data)
{
switch (data->cpu_feature) {
- case SYSTEM_INTEL_MSR_CAPABLE:
+ case SYSTEM_INTEL_MSR_CAPABLE:
return extract_msr(val, data);
- case SYSTEM_IO_CAPABLE:
+ case SYSTEM_IO_CAPABLE:
return extract_io(val, data);
- default:
+ default:
return 0;
}
}
}
}
-static void rdport(u16 port, u8 bit_width, u32 *ret)
+static void rdport(u16 port, u8 bit_width, u32 * ret)
{
*ret = 0;
if (bit_width <= 8) {
u32 h;
switch (cmd->type) {
- case SYSTEM_INTEL_MSR_CAPABLE:
+ case SYSTEM_INTEL_MSR_CAPABLE:
rdmsr(cmd->addr.msr.reg, cmd->val, h);
break;
- case SYSTEM_IO_CAPABLE:
+ case SYSTEM_IO_CAPABLE:
rdport(cmd->addr.io.port, cmd->addr.io.bit_width, &cmd->val);
break;
- default:
+ default:
break;
}
}
u32 h = 0;
switch (cmd->type) {
- case SYSTEM_INTEL_MSR_CAPABLE:
+ case SYSTEM_INTEL_MSR_CAPABLE:
wrmsr(cmd->addr.msr.reg, cmd->val, h);
break;
- case SYSTEM_IO_CAPABLE:
+ case SYSTEM_IO_CAPABLE:
wrport(cmd->addr.io.port, cmd->addr.io.bit_width, cmd->val);
break;
- default:
+ default:
break;
}
}
static inline void drv_read(struct drv_cmd *cmd)
{
- cpumask_t saved_mask = current->cpus_allowed;
+ cpumask_t saved_mask = current->cpus_allowed;
cmd->val = 0;
set_cpus_allowed(current, cmd->mask);
static void drv_write(struct drv_cmd *cmd)
{
- cpumask_t saved_mask = current->cpus_allowed;
- unsigned int i;
+ cpumask_t saved_mask = current->cpus_allowed;
+ unsigned int i;
for_each_cpu_mask(i, cmd->mask) {
set_cpus_allowed(current, cpumask_of_cpu(i));
static u32 get_cur_val(cpumask_t mask)
{
- struct acpi_processor_performance *perf;
- struct drv_cmd cmd;
+ struct acpi_processor_performance *perf;
+ struct drv_cmd cmd;
if (unlikely(cpus_empty(mask)))
return 0;
static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
{
- struct acpi_cpufreq_data *data = drv_data[cpu];
- unsigned int freq;
+ struct acpi_cpufreq_data *data = drv_data[cpu];
+ unsigned int freq;
dprintk("get_cur_freq_on_cpu (%d)\n", cpu);
if (unlikely(data == NULL ||
- data->acpi_data == NULL ||
- data->freq_table == NULL)) {
+ data->acpi_data == NULL || data->freq_table == NULL)) {
return 0;
}
}
static unsigned int check_freqs(cpumask_t mask, unsigned int freq,
- struct acpi_cpufreq_data *data)
+ struct acpi_cpufreq_data *data)
{
- unsigned int cur_freq;
- unsigned int i;
+ unsigned int cur_freq;
+ unsigned int i;
for (i = 0; i < 100; i++) {
cur_freq = extract_freq(get_cur_val(mask), data);
}
static int acpi_cpufreq_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
+ unsigned int target_freq, unsigned int relation)
{
- struct acpi_cpufreq_data *data = drv_data[policy->cpu];
- struct acpi_processor_performance *perf;
- struct cpufreq_freqs freqs;
- cpumask_t online_policy_cpus;
- struct drv_cmd cmd;
- unsigned int msr;
- unsigned int next_state = 0;
- unsigned int next_perf_state = 0;
- unsigned int i;
- int result = 0;
+ struct acpi_cpufreq_data *data = drv_data[policy->cpu];
+ struct acpi_processor_performance *perf;
+ struct cpufreq_freqs freqs;
+ cpumask_t online_policy_cpus;
+ struct drv_cmd cmd;
+ unsigned int msr;
+ unsigned int next_state = 0;
+ unsigned int next_perf_state = 0;
+ unsigned int i;
+ int result = 0;
dprintk("acpi_cpufreq_target %d (%d)\n", target_freq, policy->cpu);
if (unlikely(data == NULL ||
- data->acpi_data == NULL ||
- data->freq_table == NULL)) {
+ data->acpi_data == NULL || data->freq_table == NULL)) {
return -ENODEV;
}
perf = data->acpi_data;
result = cpufreq_frequency_table_target(policy,
- data->freq_table,
- target_freq,
- relation,
- &next_state);
+ data->freq_table,
+ target_freq,
+ relation, &next_state);
if (unlikely(result))
return -ENODEV;
next_perf_state = data->freq_table[next_state].index;
if (freqs.new == freqs.old) {
if (unlikely(data->resume)) {
- dprintk("Called after resume, resetting to P%d\n", next_perf_state);
+ dprintk("Called after resume, resetting to P%d\n",
+ next_perf_state);
data->resume = 0;
} else {
- dprintk("Already at target state (P%d)\n", next_perf_state);
+ dprintk("Already at target state (P%d)\n",
+ next_perf_state);
return 0;
}
}
- switch (data->cpu_feature) {
- case SYSTEM_INTEL_MSR_CAPABLE:
- cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
- cmd.addr.msr.reg = MSR_IA32_PERF_CTL;
- msr = (u32) perf->states[next_perf_state].control & INTEL_MSR_RANGE;
- cmd.val = (cmd.val & ~INTEL_MSR_RANGE) | msr;
- break;
- case SYSTEM_IO_CAPABLE:
- cmd.type = SYSTEM_IO_CAPABLE;
- cmd.addr.io.port = perf->control_register.address;
- cmd.addr.io.bit_width = perf->control_register.bit_width;
- cmd.val = (u32) perf->states[next_perf_state].control;
- break;
- default:
- return -ENODEV;
- }
+ switch (data->cpu_feature) {
+ case SYSTEM_INTEL_MSR_CAPABLE:
+ cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
+ cmd.addr.msr.reg = MSR_IA32_PERF_CTL;
+ msr =
+ (u32) perf->states[next_perf_state].
+ control & INTEL_MSR_RANGE;
+ cmd.val = (cmd.val & ~INTEL_MSR_RANGE) | msr;
+ break;
+ case SYSTEM_IO_CAPABLE:
+ cmd.type = SYSTEM_IO_CAPABLE;
+ cmd.addr.io.port = perf->control_register.address;
+ cmd.addr.io.bit_width = perf->control_register.bit_width;
+ cmd.val = (u32) perf->states[next_perf_state].control;
+ break;
+ default:
+ return -ENODEV;
+ }
cpus_clear(cmd.mask);
if (acpi_pstate_strict) {
if (!check_freqs(cmd.mask, freqs.new, data)) {
dprintk("acpi_cpufreq_target failed (%d)\n",
- policy->cpu);
+ policy->cpu);
return -EAGAIN;
}
}
return result;
}
-
-static int
-acpi_cpufreq_verify (
- struct cpufreq_policy *policy)
+static int acpi_cpufreq_verify(struct cpufreq_policy *policy)
{
struct acpi_cpufreq_data *data = drv_data[policy->cpu];
return cpufreq_frequency_table_verify(policy, data->freq_table);
}
-
static unsigned long
-acpi_cpufreq_guess_freq (
- struct acpi_cpufreq_data *data,
- unsigned int cpu)
+acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
{
- struct acpi_processor_performance *perf = data->acpi_data;
+ struct acpi_processor_performance *perf = data->acpi_data;
if (cpu_khz) {
/* search the closest match to cpu_khz */
for (i = 0; i < (perf->state_count - 1); i++) {
freq = freqn;
- freqn = perf->states[i+1].core_frequency * 1000;
+ freqn = perf->states[i + 1].core_frequency * 1000;
if ((2 * cpu_khz) > (freqn + freq)) {
perf->state = i;
- return (freq);
+ return freq;
}
}
perf->state = perf->state_count - 1;
- return (freqn);
+ return freqn;
} else {
/* assume CPU is at P0... */
perf->state = 0;
}
}
-
/*
* acpi_cpufreq_early_init - initialize ACPI P-States library
*
*/
static int acpi_cpufreq_early_init(void)
{
- struct acpi_processor_performance *data;
- cpumask_t covered;
- unsigned int i, j;
+ struct acpi_processor_performance *data;
+ cpumask_t covered;
+ unsigned int i, j;
dprintk("acpi_cpufreq_early_init\n");
for_each_possible_cpu(i) {
- data = kzalloc(sizeof(struct acpi_processor_performance),
- GFP_KERNEL);
+ data = kzalloc(sizeof(struct acpi_processor_performance),
+ GFP_KERNEL);
if (!data) {
for_each_cpu_mask(j, covered) {
kfree(acpi_perf_data[j]);
acpi_perf_data[j] = NULL;
}
- return (-ENOMEM);
+ return -ENOMEM;
}
acpi_perf_data[i] = data;
cpu_set(i, covered);
{ }
};
-static int
-acpi_cpufreq_cpu_init (
- struct cpufreq_policy *policy)
+static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
- unsigned int i;
- unsigned int valid_states = 0;
- unsigned int cpu = policy->cpu;
- struct acpi_cpufreq_data *data;
- unsigned int l, h;
- unsigned int result = 0;
- struct cpuinfo_x86 *c = &cpu_data[policy->cpu];
- struct acpi_processor_performance *perf;
+ unsigned int i;
+ unsigned int valid_states = 0;
+ unsigned int cpu = policy->cpu;
+ struct acpi_cpufreq_data *data;
+ unsigned int l, h;
+ unsigned int result = 0;
+ struct cpuinfo_x86 *c = &cpu_data[policy->cpu];
+ struct acpi_processor_performance *perf;
dprintk("acpi_cpufreq_cpu_init\n");
if (!acpi_perf_data[cpu])
- return (-ENODEV);
+ return -ENODEV;
data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL);
if (!data)
- return (-ENOMEM);
+ return -ENOMEM;
data->acpi_data = acpi_perf_data[cpu];
drv_data[cpu] = data;
}
switch (perf->control_register.space_id) {
- case ACPI_ADR_SPACE_SYSTEM_IO:
+ case ACPI_ADR_SPACE_SYSTEM_IO:
dprintk("SYSTEM IO addr space\n");
data->cpu_feature = SYSTEM_IO_CAPABLE;
break;
- case ACPI_ADR_SPACE_FIXED_HARDWARE:
+ case ACPI_ADR_SPACE_FIXED_HARDWARE:
dprintk("HARDWARE addr space\n");
if (!check_est_cpu(cpu)) {
result = -ENODEV;
}
data->cpu_feature = SYSTEM_INTEL_MSR_CAPABLE;
break;
- default:
+ default:
dprintk("Unknown addr space %d\n",
- (u32) (perf->control_register.space_id));
+ (u32) (perf->control_register.space_id));
result = -ENODEV;
goto err_unreg;
}
- data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) * (perf->state_count + 1), GFP_KERNEL);
+ data->freq_table =
+ kmalloc(sizeof(struct cpufreq_frequency_table) *
+ (perf->state_count + 1), GFP_KERNEL);
if (!data->freq_table) {
result = -ENOMEM;
goto err_unreg;
/* detect transition latency */
policy->cpuinfo.transition_latency = 0;
- for (i=0; i<perf->state_count; i++) {
- if ((perf->states[i].transition_latency * 1000) > policy->cpuinfo.transition_latency)
- policy->cpuinfo.transition_latency = perf->states[i].transition_latency * 1000;
+ for (i = 0; i < perf->state_count; i++) {
+ if ((perf->states[i].transition_latency * 1000) >
+ policy->cpuinfo.transition_latency)
+ policy->cpuinfo.transition_latency =
+ perf->states[i].transition_latency * 1000;
}
policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
/* table init */
- for (i=0; i<perf->state_count; i++)
- {
- if ( i > 0 && perf->states[i].core_frequency ==
- perf->states[i - 1].core_frequency)
+ for (i = 0; i < perf->state_count; i++) {
+ if (i > 0 && perf->states[i].core_frequency ==
+ perf->states[i - 1].core_frequency)
continue;
data->freq_table[valid_states].index = i;
data->freq_table[valid_states].frequency =
- perf->states[i].core_frequency * 1000;
+ perf->states[i].core_frequency * 1000;
valid_states++;
}
data->freq_table[perf->state_count].frequency = CPUFREQ_TABLE_END;
}
switch (data->cpu_feature) {
- case ACPI_ADR_SPACE_SYSTEM_IO:
+ case ACPI_ADR_SPACE_SYSTEM_IO:
/* Current speed is unknown and not detectable by IO port */
policy->cur = acpi_cpufreq_guess_freq(data, policy->cpu);
break;
- case ACPI_ADR_SPACE_FIXED_HARDWARE:
+ case ACPI_ADR_SPACE_FIXED_HARDWARE:
get_cur_freq_on_cpu(cpu);
break;
- default:
+ default:
break;
}
dprintk("CPU%u - ACPI performance management activated.\n", cpu);
for (i = 0; i < perf->state_count; i++)
dprintk(" %cP%d: %d MHz, %d mW, %d uS\n",
- (i == perf->state?'*':' '), i,
+ (i == perf->state ? '*' : ' '), i,
(u32) perf->states[i].core_frequency,
(u32) perf->states[i].power,
(u32) perf->states[i].transition_latency);
cpufreq_frequency_table_get_attr(data->freq_table, policy->cpu);
-
+
/*
* the first call to ->target() should result in us actually
* writing something to the appropriate registers.
*/
data->resume = 1;
-
+
return result;
- err_freqfree:
+ err_freqfree:
kfree(data->freq_table);
- err_unreg:
+ err_unreg:
acpi_processor_unregister_performance(perf, cpu);
- err_free:
+ err_free:
kfree(data);
drv_data[cpu] = NULL;
- return (result);
+ return result;
}
-
-static int
-acpi_cpufreq_cpu_exit (
- struct cpufreq_policy *policy)
+static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy)
{
struct acpi_cpufreq_data *data = drv_data[policy->cpu];
-
dprintk("acpi_cpufreq_cpu_exit\n");
if (data) {
cpufreq_frequency_table_put_attr(policy->cpu);
drv_data[policy->cpu] = NULL;
- acpi_processor_unregister_performance(data->acpi_data, policy->cpu);
+ acpi_processor_unregister_performance(data->acpi_data,
+ policy->cpu);
kfree(data);
}
- return (0);
+ return 0;
}
-static int
-acpi_cpufreq_resume (
- struct cpufreq_policy *policy)
+static int acpi_cpufreq_resume(struct cpufreq_policy *policy)
{
struct acpi_cpufreq_data *data = drv_data[policy->cpu];
-
dprintk("acpi_cpufreq_resume\n");
data->resume = 1;
- return (0);
+ return 0;
}
-
-static struct freq_attr* acpi_cpufreq_attr[] = {
+static struct freq_attr *acpi_cpufreq_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
static struct cpufreq_driver acpi_cpufreq_driver = {
- .verify = acpi_cpufreq_verify,
- .target = acpi_cpufreq_target,
- .get = get_cur_freq_on_cpu,
- .init = acpi_cpufreq_cpu_init,
- .exit = acpi_cpufreq_cpu_exit,
- .resume = acpi_cpufreq_resume,
- .name = "acpi-cpufreq",
- .owner = THIS_MODULE,
- .attr = acpi_cpufreq_attr,
+ .verify = acpi_cpufreq_verify,
+ .target = acpi_cpufreq_target,
+ .get = get_cur_freq_on_cpu,
+ .init = acpi_cpufreq_cpu_init,
+ .exit = acpi_cpufreq_cpu_exit,
+ .resume = acpi_cpufreq_resume,
+ .name = "acpi-cpufreq",
+ .owner = THIS_MODULE,
+ .attr = acpi_cpufreq_attr,
};
-
-static int __init
-acpi_cpufreq_init (void)
+static int __init acpi_cpufreq_init(void)
{
dprintk("acpi_cpufreq_init\n");
acpi_cpufreq_early_init();
- return cpufreq_register_driver(&acpi_cpufreq_driver);
+ return cpufreq_register_driver(&acpi_cpufreq_driver);
}
-
-static void __exit
-acpi_cpufreq_exit (void)
+static void __exit acpi_cpufreq_exit(void)
{
- unsigned int i;
+ unsigned int i;
dprintk("acpi_cpufreq_exit\n");
cpufreq_unregister_driver(&acpi_cpufreq_driver);
}
module_param(acpi_pstate_strict, uint, 0644);
-MODULE_PARM_DESC(acpi_pstate_strict, "value 0 or non-zero. non-zero -> strict ACPI checks are performed during frequency changes.");
+MODULE_PARM_DESC(acpi_pstate_strict,
+ "value 0 or non-zero. non-zero -> strict ACPI checks are performed during frequency changes.");
late_initcall(acpi_cpufreq_init);
module_exit(acpi_cpufreq_exit);
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff