Merge remote-tracking branch 'lsk/v3.10/topic/aosp' into linux-linaro-lsk-android

[firefly-linux-kernel-4.4.55.git] / drivers / cpufreq / intel_pstate.c

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 07f2840ad80596b529488f40808e10c70782f498..34d19b1984a19b76f92352adbde66e83796730b7 100644 (file)
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -48,7 +48,7 @@ static inline int32_t div_fp(int32_t x, int32_t y)
 }
 
 struct sample {
-       int core_pct_busy;
+       int32_t core_pct_busy;
        u64 aperf;
        u64 mperf;
        int freq;
@@ -68,7 +68,7 @@ struct _pid {
        int32_t i_gain;
        int32_t d_gain;
        int deadband;
-       int last_err;
+       int32_t last_err;
 };
 
 struct cpudata {
@@ -103,10 +103,10 @@ struct pstate_adjust_policy {
 static struct pstate_adjust_policy default_policy = {
        .sample_rate_ms = 10,
        .deadband = 0,
-       .setpoint = 109,
-       .p_gain_pct = 17,
+       .setpoint = 97,
+       .p_gain_pct = 20,
        .d_gain_pct = 0,
-       .i_gain_pct = 4,
+       .i_gain_pct = 0,
 };
 
 struct perf_limits {
@@ -153,16 +153,15 @@ static inline void pid_d_gain_set(struct _pid *pid, int percent)
        pid->d_gain = div_fp(int_tofp(percent), int_tofp(100));
 }
 
-static signed int pid_calc(struct _pid *pid, int busy)
+static signed int pid_calc(struct _pid *pid, int32_t busy)
 {
-       signed int err, result;
+       signed int result;
        int32_t pterm, dterm, fp_error;
        int32_t integral_limit;
 
-       err = pid->setpoint - busy;
-       fp_error = int_tofp(err);
+       fp_error = int_tofp(pid->setpoint) - busy;
 
-       if (abs(err) <= pid->deadband)
+       if (abs(fp_error) <= int_tofp(pid->deadband))
                return 0;
 
        pterm = mul_fp(pid->p_gain, fp_error);
@@ -176,8 +175,8 @@ static signed int pid_calc(struct _pid *pid, int busy)
        if (pid->integral < -integral_limit)
                pid->integral = -integral_limit;
 
-       dterm = mul_fp(pid->d_gain, (err - pid->last_err));
-       pid->last_err = err;
+       dterm = mul_fp(pid->d_gain, fp_error - pid->last_err);
+       pid->last_err = fp_error;
 
        result = pterm + mul_fp(pid->integral, pid->i_gain) + dterm;
 
@@ -367,12 +366,13 @@ static int intel_pstate_turbo_pstate(void)
 static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
 {
        int max_perf = cpu->pstate.turbo_pstate;
+       int max_perf_adj;
        int min_perf;
        if (limits.no_turbo)
                max_perf = cpu->pstate.max_pstate;
 
-       max_perf = fp_toint(mul_fp(int_tofp(max_perf), limits.max_perf));
-       *max = clamp_t(int, max_perf,
+       max_perf_adj = fp_toint(mul_fp(int_tofp(max_perf), limits.max_perf));
+       *max = clamp_t(int, max_perf_adj,
                        cpu->pstate.min_pstate, cpu->pstate.turbo_pstate);
 
        min_perf = fp_toint(mul_fp(int_tofp(max_perf), limits.min_perf));
@@ -394,7 +394,10 @@ static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate)
        trace_cpu_frequency(pstate * 100000, cpu->cpu);
 
        cpu->pstate.current_pstate = pstate;
-       wrmsrl(MSR_IA32_PERF_CTL, pstate << 8);
+       if (limits.no_turbo)
+               wrmsrl(MSR_IA32_PERF_CTL, BIT(32) | (pstate << 8));
+       else
+               wrmsrl(MSR_IA32_PERF_CTL, pstate << 8);
 
 }
 
@@ -432,8 +435,9 @@ static inline void intel_pstate_calc_busy(struct cpudata *cpu,
                                        struct sample *sample)
 {
        u64 core_pct;
-       core_pct = div64_u64(sample->aperf * 100, sample->mperf);
-       sample->freq = cpu->pstate.max_pstate * core_pct * 1000;
+       core_pct = div64_u64(int_tofp(sample->aperf * 100),
+                            sample->mperf);
+       sample->freq = fp_toint(cpu->pstate.max_pstate * core_pct * 1000);
 
        sample->core_pct_busy = core_pct;
 }
@@ -465,22 +469,19 @@ static inline void intel_pstate_set_sample_time(struct cpudata *cpu)
        mod_timer_pinned(&cpu->timer, jiffies + delay);
 }
 
-static inline int intel_pstate_get_scaled_busy(struct cpudata *cpu)
+static inline int32_t intel_pstate_get_scaled_busy(struct cpudata *cpu)
 {
-       int32_t busy_scaled;
-       int32_t core_busy, turbo_pstate, current_pstate;
+       int32_t core_busy, max_pstate, current_pstate;
 
-       core_busy = int_tofp(cpu->samples[cpu->sample_ptr].core_pct_busy);
-       turbo_pstate = int_tofp(cpu->pstate.turbo_pstate);
+       core_busy = cpu->samples[cpu->sample_ptr].core_pct_busy;
+       max_pstate = int_tofp(cpu->pstate.max_pstate);
        current_pstate = int_tofp(cpu->pstate.current_pstate);
-       busy_scaled = mul_fp(core_busy, div_fp(turbo_pstate, current_pstate));
-
-       return fp_toint(busy_scaled);
+       return mul_fp(core_busy, div_fp(max_pstate, current_pstate));
 }
 
 static inline void intel_pstate_adjust_busy_pstate(struct cpudata *cpu)
 {
-       int busy_scaled;
+       int32_t busy_scaled;
        struct _pid *pid;
        signed int ctl = 0;
        int steps;
@@ -516,12 +517,18 @@ static void intel_pstate_timer_func(unsigned long __data)
 }
 
 #define ICPU(model, policy) \
-       { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&policy }
+       { X86_VENDOR_INTEL, 6, model, X86_FEATURE_APERFMPERF,\
+                       (unsigned long)&policy }
 
 static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
        ICPU(0x2a, default_policy),
        ICPU(0x2d, default_policy),
        ICPU(0x3a, default_policy),
+       ICPU(0x3c, default_policy),
+       ICPU(0x3e, default_policy),
+       ICPU(0x3f, default_policy),
+       ICPU(0x45, default_policy),
+       ICPU(0x46, default_policy),
        {}
 };
 MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);
@@ -543,6 +550,11 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
        cpu = all_cpu_data[cpunum];
 
        intel_pstate_get_cpu_pstates(cpu);
+       if (!cpu->pstate.current_pstate) {
+               all_cpu_data[cpunum] = NULL;
+               kfree(cpu);
+               return -ENODATA;
+       }
 
        cpu->cpu = cpunum;
        cpu->pstate_policy =
@@ -629,8 +641,8 @@ static int __cpuinit intel_pstate_cpu_exit(struct cpufreq_policy *policy)
 
 static int __cpuinit intel_pstate_cpu_init(struct cpufreq_policy *policy)
 {
-       int rc, min_pstate, max_pstate;
        struct cpudata *cpu;
+       int rc;
 
        rc = intel_pstate_init_cpu(policy->cpu);
        if (rc)
@@ -644,9 +656,8 @@ static int __cpuinit intel_pstate_cpu_init(struct cpufreq_policy *policy)
        else
                policy->policy = CPUFREQ_POLICY_POWERSAVE;
 
-       intel_pstate_get_min_max(cpu, &min_pstate, &max_pstate);
-       policy->min = min_pstate * 100000;
-       policy->max = max_pstate * 100000;
+       policy->min = cpu->pstate.min_pstate * 100000;
+       policy->max = cpu->pstate.turbo_pstate * 100000;
 
        /* cpuinfo and default policy values */
        policy->cpuinfo.min_freq = cpu->pstate.min_pstate * 100000;