[CPUFREQ][5/8] acpi-cpufreq: lindent acpi-cpufreq.c
Lindent acpi-cpufreq. Additional changes replacing "return (..)" by "return ..". No functionality changes in this patch. Signed-off-by: Denis Sadykov <denis.m.sadykov@intel.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Dave Jones <davej@redhat.com>hifive-unleashed-5.1
Venkatesh Pallipadi
Dave Jones
parent
83d0515bbb
commit
64be7eedb2
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@ -51,7 +51,6 @@ MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski");
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MODULE_DESCRIPTION("ACPI Processor P-States Driver");
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MODULE_LICENSE("GPL");
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enum {
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UNDEFINED_CAPABLE = 0,
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SYSTEM_INTEL_MSR_CAPABLE,
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@ -61,36 +60,34 @@ enum {
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#define INTEL_MSR_RANGE (0xffff)
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struct acpi_cpufreq_data {
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struct acpi_processor_performance *acpi_data;
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struct cpufreq_frequency_table *freq_table;
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unsigned int resume;
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unsigned int cpu_feature;
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struct acpi_processor_performance *acpi_data;
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struct cpufreq_frequency_table *freq_table;
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unsigned int resume;
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unsigned int cpu_feature;
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};
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static struct acpi_cpufreq_data *drv_data[NR_CPUS];
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static struct acpi_processor_performance *acpi_perf_data[NR_CPUS];
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static struct acpi_cpufreq_data *drv_data[NR_CPUS];
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static struct acpi_processor_performance *acpi_perf_data[NR_CPUS];
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static struct cpufreq_driver acpi_cpufreq_driver;
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static unsigned int acpi_pstate_strict;
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static int check_est_cpu(unsigned int cpuid)
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{
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struct cpuinfo_x86 *cpu = &cpu_data[cpuid];
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if (cpu->x86_vendor != X86_VENDOR_INTEL ||
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!cpu_has(cpu, X86_FEATURE_EST))
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!cpu_has(cpu, X86_FEATURE_EST))
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return 0;
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return 1;
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}
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static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
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{
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struct acpi_processor_performance *perf;
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int i;
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struct acpi_processor_performance *perf;
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int i;
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perf = data->acpi_data;
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@ -101,7 +98,6 @@ static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
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return 0;
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}
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static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
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{
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int i;
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@ -114,15 +110,14 @@ static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
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return data->freq_table[0].frequency;
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}
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static unsigned extract_freq(u32 val, struct acpi_cpufreq_data *data)
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{
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switch (data->cpu_feature) {
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case SYSTEM_INTEL_MSR_CAPABLE:
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case SYSTEM_INTEL_MSR_CAPABLE:
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return extract_msr(val, data);
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case SYSTEM_IO_CAPABLE:
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case SYSTEM_IO_CAPABLE:
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return extract_io(val, data);
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default:
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default:
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return 0;
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}
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}
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@ -138,7 +133,7 @@ static void wrport(u16 port, u8 bit_width, u32 value)
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}
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}
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static void rdport(u16 port, u8 bit_width, u32 *ret)
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static void rdport(u16 port, u8 bit_width, u32 * ret)
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{
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*ret = 0;
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if (bit_width <= 8) {
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@ -176,13 +171,13 @@ static void do_drv_read(struct drv_cmd *cmd)
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u32 h;
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switch (cmd->type) {
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case SYSTEM_INTEL_MSR_CAPABLE:
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case SYSTEM_INTEL_MSR_CAPABLE:
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rdmsr(cmd->addr.msr.reg, cmd->val, h);
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break;
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case SYSTEM_IO_CAPABLE:
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case SYSTEM_IO_CAPABLE:
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rdport(cmd->addr.io.port, cmd->addr.io.bit_width, &cmd->val);
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break;
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default:
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default:
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break;
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}
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}
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@ -192,20 +187,20 @@ static void do_drv_write(struct drv_cmd *cmd)
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u32 h = 0;
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switch (cmd->type) {
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case SYSTEM_INTEL_MSR_CAPABLE:
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case SYSTEM_INTEL_MSR_CAPABLE:
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wrmsr(cmd->addr.msr.reg, cmd->val, h);
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break;
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case SYSTEM_IO_CAPABLE:
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case SYSTEM_IO_CAPABLE:
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wrport(cmd->addr.io.port, cmd->addr.io.bit_width, cmd->val);
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break;
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default:
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default:
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break;
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}
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}
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static inline void drv_read(struct drv_cmd *cmd)
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{
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cpumask_t saved_mask = current->cpus_allowed;
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cpumask_t saved_mask = current->cpus_allowed;
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cmd->val = 0;
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set_cpus_allowed(current, cmd->mask);
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@ -216,8 +211,8 @@ static inline void drv_read(struct drv_cmd *cmd)
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static void drv_write(struct drv_cmd *cmd)
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{
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cpumask_t saved_mask = current->cpus_allowed;
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unsigned int i;
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cpumask_t saved_mask = current->cpus_allowed;
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unsigned int i;
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for_each_cpu_mask(i, cmd->mask) {
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set_cpus_allowed(current, cpumask_of_cpu(i));
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@ -230,8 +225,8 @@ static void drv_write(struct drv_cmd *cmd)
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static u32 get_cur_val(cpumask_t mask)
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{
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struct acpi_processor_performance *perf;
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struct drv_cmd cmd;
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struct acpi_processor_performance *perf;
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struct drv_cmd cmd;
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if (unlikely(cpus_empty(mask)))
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return 0;
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@ -262,14 +257,13 @@ static u32 get_cur_val(cpumask_t mask)
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static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
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{
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struct acpi_cpufreq_data *data = drv_data[cpu];
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unsigned int freq;
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struct acpi_cpufreq_data *data = drv_data[cpu];
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unsigned int freq;
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dprintk("get_cur_freq_on_cpu (%d)\n", cpu);
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if (unlikely(data == NULL ||
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data->acpi_data == NULL ||
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data->freq_table == NULL)) {
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data->acpi_data == NULL || data->freq_table == NULL)) {
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return 0;
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}
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@ -280,10 +274,10 @@ static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
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}
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static unsigned int check_freqs(cpumask_t mask, unsigned int freq,
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struct acpi_cpufreq_data *data)
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struct acpi_cpufreq_data *data)
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{
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unsigned int cur_freq;
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unsigned int i;
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unsigned int cur_freq;
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unsigned int i;
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for (i = 0; i < 100; i++) {
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cur_freq = extract_freq(get_cur_val(mask), data);
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@ -295,34 +289,31 @@ static unsigned int check_freqs(cpumask_t mask, unsigned int freq,
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}
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static int acpi_cpufreq_target(struct cpufreq_policy *policy,
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unsigned int target_freq,
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unsigned int relation)
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unsigned int target_freq, unsigned int relation)
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{
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struct acpi_cpufreq_data *data = drv_data[policy->cpu];
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struct acpi_processor_performance *perf;
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struct cpufreq_freqs freqs;
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cpumask_t online_policy_cpus;
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struct drv_cmd cmd;
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unsigned int msr;
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unsigned int next_state = 0;
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unsigned int next_perf_state = 0;
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unsigned int i;
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int result = 0;
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struct acpi_cpufreq_data *data = drv_data[policy->cpu];
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struct acpi_processor_performance *perf;
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struct cpufreq_freqs freqs;
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cpumask_t online_policy_cpus;
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struct drv_cmd cmd;
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unsigned int msr;
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unsigned int next_state = 0;
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unsigned int next_perf_state = 0;
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unsigned int i;
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int result = 0;
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dprintk("acpi_cpufreq_target %d (%d)\n", target_freq, policy->cpu);
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if (unlikely(data == NULL ||
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data->acpi_data == NULL ||
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data->freq_table == NULL)) {
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data->acpi_data == NULL || data->freq_table == NULL)) {
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return -ENODEV;
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}
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perf = data->acpi_data;
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result = cpufreq_frequency_table_target(policy,
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data->freq_table,
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target_freq,
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relation,
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&next_state);
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data->freq_table,
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target_freq,
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relation, &next_state);
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if (unlikely(result))
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return -ENODEV;
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@ -339,30 +330,34 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
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next_perf_state = data->freq_table[next_state].index;
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if (freqs.new == freqs.old) {
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if (unlikely(data->resume)) {
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dprintk("Called after resume, resetting to P%d\n", next_perf_state);
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dprintk("Called after resume, resetting to P%d\n",
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next_perf_state);
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data->resume = 0;
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} else {
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dprintk("Already at target state (P%d)\n", next_perf_state);
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dprintk("Already at target state (P%d)\n",
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next_perf_state);
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return 0;
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}
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}
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switch (data->cpu_feature) {
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case SYSTEM_INTEL_MSR_CAPABLE:
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cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
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cmd.addr.msr.reg = MSR_IA32_PERF_CTL;
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msr = (u32) perf->states[next_perf_state].control & INTEL_MSR_RANGE;
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cmd.val = (cmd.val & ~INTEL_MSR_RANGE) | msr;
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break;
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case SYSTEM_IO_CAPABLE:
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cmd.type = SYSTEM_IO_CAPABLE;
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cmd.addr.io.port = perf->control_register.address;
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cmd.addr.io.bit_width = perf->control_register.bit_width;
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cmd.val = (u32) perf->states[next_perf_state].control;
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break;
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default:
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return -ENODEV;
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}
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switch (data->cpu_feature) {
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case SYSTEM_INTEL_MSR_CAPABLE:
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cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
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cmd.addr.msr.reg = MSR_IA32_PERF_CTL;
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msr =
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(u32) perf->states[next_perf_state].
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control & INTEL_MSR_RANGE;
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cmd.val = (cmd.val & ~INTEL_MSR_RANGE) | msr;
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break;
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case SYSTEM_IO_CAPABLE:
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cmd.type = SYSTEM_IO_CAPABLE;
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cmd.addr.io.port = perf->control_register.address;
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cmd.addr.io.bit_width = perf->control_register.bit_width;
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cmd.val = (u32) perf->states[next_perf_state].control;
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break;
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default:
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return -ENODEV;
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}
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cpus_clear(cmd.mask);
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@ -381,7 +376,7 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
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if (acpi_pstate_strict) {
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if (!check_freqs(cmd.mask, freqs.new, data)) {
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dprintk("acpi_cpufreq_target failed (%d)\n",
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policy->cpu);
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policy->cpu);
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return -EAGAIN;
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}
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}
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@ -395,10 +390,7 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
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return result;
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}
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static int
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acpi_cpufreq_verify (
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struct cpufreq_policy *policy)
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static int acpi_cpufreq_verify(struct cpufreq_policy *policy)
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{
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struct acpi_cpufreq_data *data = drv_data[policy->cpu];
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@ -407,13 +399,10 @@ acpi_cpufreq_verify (
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return cpufreq_frequency_table_verify(policy, data->freq_table);
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}
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static unsigned long
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acpi_cpufreq_guess_freq (
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struct acpi_cpufreq_data *data,
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unsigned int cpu)
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acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
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{
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struct acpi_processor_performance *perf = data->acpi_data;
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struct acpi_processor_performance *perf = data->acpi_data;
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if (cpu_khz) {
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/* search the closest match to cpu_khz */
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@ -423,14 +412,14 @@ acpi_cpufreq_guess_freq (
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for (i = 0; i < (perf->state_count - 1); i++) {
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freq = freqn;
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freqn = perf->states[i+1].core_frequency * 1000;
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freqn = perf->states[i + 1].core_frequency * 1000;
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if ((2 * cpu_khz) > (freqn + freq)) {
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perf->state = i;
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return (freq);
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return freq;
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}
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}
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perf->state = perf->state_count - 1;
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return (freqn);
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return freqn;
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} else {
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/* assume CPU is at P0... */
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perf->state = 0;
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@ -438,7 +427,6 @@ acpi_cpufreq_guess_freq (
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}
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}
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/*
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* acpi_cpufreq_early_init - initialize ACPI P-States library
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*
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@ -449,21 +437,21 @@ acpi_cpufreq_guess_freq (
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*/
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static int acpi_cpufreq_early_init(void)
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{
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struct acpi_processor_performance *data;
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cpumask_t covered;
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unsigned int i, j;
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struct acpi_processor_performance *data;
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cpumask_t covered;
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unsigned int i, j;
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dprintk("acpi_cpufreq_early_init\n");
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for_each_possible_cpu(i) {
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data = kzalloc(sizeof(struct acpi_processor_performance),
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GFP_KERNEL);
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data = kzalloc(sizeof(struct acpi_processor_performance),
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GFP_KERNEL);
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if (!data) {
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for_each_cpu_mask(j, covered) {
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kfree(acpi_perf_data[j]);
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acpi_perf_data[j] = NULL;
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}
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return (-ENOMEM);
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return -ENOMEM;
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}
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acpi_perf_data[i] = data;
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cpu_set(i, covered);
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@ -501,27 +489,25 @@ static struct dmi_system_id sw_any_bug_dmi_table[] = {
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{ }
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};
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static int
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acpi_cpufreq_cpu_init (
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struct cpufreq_policy *policy)
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static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
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{
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unsigned int i;
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unsigned int valid_states = 0;
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unsigned int cpu = policy->cpu;
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struct acpi_cpufreq_data *data;
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unsigned int l, h;
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unsigned int result = 0;
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struct cpuinfo_x86 *c = &cpu_data[policy->cpu];
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struct acpi_processor_performance *perf;
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unsigned int i;
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unsigned int valid_states = 0;
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unsigned int cpu = policy->cpu;
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struct acpi_cpufreq_data *data;
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unsigned int l, h;
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unsigned int result = 0;
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struct cpuinfo_x86 *c = &cpu_data[policy->cpu];
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struct acpi_processor_performance *perf;
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dprintk("acpi_cpufreq_cpu_init\n");
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if (!acpi_perf_data[cpu])
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return (-ENODEV);
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return -ENODEV;
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data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL);
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if (!data)
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return (-ENOMEM);
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return -ENOMEM;
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data->acpi_data = acpi_perf_data[cpu];
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drv_data[cpu] = data;
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@ -566,11 +552,11 @@ acpi_cpufreq_cpu_init (
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}
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switch (perf->control_register.space_id) {
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case ACPI_ADR_SPACE_SYSTEM_IO:
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case ACPI_ADR_SPACE_SYSTEM_IO:
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dprintk("SYSTEM IO addr space\n");
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data->cpu_feature = SYSTEM_IO_CAPABLE;
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break;
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case ACPI_ADR_SPACE_FIXED_HARDWARE:
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case ACPI_ADR_SPACE_FIXED_HARDWARE:
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dprintk("HARDWARE addr space\n");
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if (!check_est_cpu(cpu)) {
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result = -ENODEV;
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@ -578,14 +564,16 @@ acpi_cpufreq_cpu_init (
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}
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data->cpu_feature = SYSTEM_INTEL_MSR_CAPABLE;
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break;
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default:
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default:
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dprintk("Unknown addr space %d\n",
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(u32) (perf->control_register.space_id));
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(u32) (perf->control_register.space_id));
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result = -ENODEV;
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goto err_unreg;
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}
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data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) * (perf->state_count + 1), GFP_KERNEL);
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data->freq_table =
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kmalloc(sizeof(struct cpufreq_frequency_table) *
|
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(perf->state_count + 1), GFP_KERNEL);
|
||||
if (!data->freq_table) {
|
||||
result = -ENOMEM;
|
||||
goto err_unreg;
|
||||
|
|
@ -593,22 +581,23 @@ acpi_cpufreq_cpu_init (
|
|||
|
||||
/* 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;
|
||||
|
|
@ -619,14 +608,14 @@ acpi_cpufreq_cpu_init (
|
|||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
|
|
@ -636,100 +625,89 @@ acpi_cpufreq_cpu_init (
|
|||
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);
|
||||
|
|
@ -742,7 +720,8 @@ acpi_cpufreq_exit (void)
|
|||
}
|
||||
|
||||
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);
|
||||
|
|
|
|||
Loading…
Reference in New Issue