diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/energy_model.c | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c index 6ecee99af842..95a3b33001f6 100644 --- a/kernel/power/energy_model.c +++ b/kernel/power/energy_model.c @@ -121,7 +121,8 @@ static void em_debug_remove_pd(struct device *dev) {} #endif static int em_create_perf_table(struct device *dev, struct em_perf_domain *pd, - int nr_states, struct em_data_callback *cb) + int nr_states, struct em_data_callback *cb, + unsigned long flags) { unsigned long power, freq, prev_freq = 0, prev_cost = ULONG_MAX; struct em_perf_state *table; @@ -173,10 +174,22 @@ static int em_create_perf_table(struct device *dev, struct em_perf_domain *pd, /* Compute the cost of each performance state. */ fmax = (u64) table[nr_states - 1].frequency; for (i = nr_states - 1; i >= 0; i--) { - unsigned long power_res = em_scale_power(table[i].power); + unsigned long power_res, cost; + + if (flags & EM_PERF_DOMAIN_ARTIFICIAL) { + ret = cb->get_cost(dev, table[i].frequency, &cost); + if (ret || !cost || cost > EM_MAX_POWER) { + dev_err(dev, "EM: invalid cost %lu %d\n", + cost, ret); + goto free_ps_table; + } + } else { + power_res = em_scale_power(table[i].power); + cost = div64_u64(fmax * power_res, table[i].frequency); + } + + table[i].cost = cost; - table[i].cost = div64_u64(fmax * power_res, - table[i].frequency); if (table[i].cost >= prev_cost) { table[i].flags = EM_PERF_STATE_INEFFICIENT; dev_dbg(dev, "EM: OPP:%lu is inefficient\n", @@ -197,7 +210,8 @@ free_ps_table: } static int em_create_pd(struct device *dev, int nr_states, - struct em_data_callback *cb, cpumask_t *cpus) + struct em_data_callback *cb, cpumask_t *cpus, + unsigned long flags) { struct em_perf_domain *pd; struct device *cpu_dev; @@ -215,7 +229,7 @@ static int em_create_pd(struct device *dev, int nr_states, return -ENOMEM; } - ret = em_create_perf_table(dev, pd, nr_states, cb); + ret = em_create_perf_table(dev, pd, nr_states, cb, flags); if (ret) { kfree(pd); return ret; @@ -332,6 +346,7 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states, bool milliwatts) { unsigned long cap, prev_cap = 0; + unsigned long flags = 0; int cpu, ret; if (!dev || !nr_states || !cb) @@ -378,14 +393,16 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states, } } - ret = em_create_pd(dev, nr_states, cb, cpus); + if (milliwatts) + flags |= EM_PERF_DOMAIN_MILLIWATTS; + else if (cb->get_cost) + flags |= EM_PERF_DOMAIN_ARTIFICIAL; + + ret = em_create_pd(dev, nr_states, cb, cpus, flags); if (ret) goto unlock; - if (milliwatts) - dev->em_pd->flags |= EM_PERF_DOMAIN_MILLIWATTS; - else if (cb->get_cost) - dev->em_pd->flags |= EM_PERF_DOMAIN_ARTIFICIAL; + dev->em_pd->flags |= flags; em_cpufreq_update_efficiencies(dev); |