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| author | Lukasz Luba <lukasz.luba@arm.com> | 2024-02-08 11:55:56 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2024-02-08 15:00:32 +0100 |
| commit | 22ea02848c07d1cbd15a5f442138ca429866300d (patch) | |
| tree | f7a2c3300fa47801d15b3b86ba60244b2bb3dfce /include/linux/energy_model.h | |
| parent | 24e9fb635df2790eccb0e95ff65c6dee7a97fcb7 (diff) | |
| download | linux-stable-22ea02848c07d1cbd15a5f442138ca429866300d.tar.gz linux-stable-22ea02848c07d1cbd15a5f442138ca429866300d.tar.bz2 linux-stable-22ea02848c07d1cbd15a5f442138ca429866300d.zip | |
PM: EM: Add em_dev_compute_costs()
The device drivers can modify EM at runtime by providing a new EM table.
The EM is used by the EAS and the em_perf_state::cost stores
pre-calculated value to avoid overhead. This patch provides the API for
device drivers to calculate the cost values properly (and not duplicate
the same code).
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/energy_model.h')
| -rw-r--r-- | include/linux/energy_model.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/energy_model.h b/include/linux/energy_model.h index 92866a81abe4..770755df852f 100644 --- a/include/linux/energy_model.h +++ b/include/linux/energy_model.h @@ -170,6 +170,8 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states, void em_dev_unregister_perf_domain(struct device *dev); struct em_perf_table __rcu *em_table_alloc(struct em_perf_domain *pd); void em_table_free(struct em_perf_table __rcu *table); +int em_dev_compute_costs(struct device *dev, struct em_perf_state *table, + int nr_states); /** * em_pd_get_efficient_state() - Get an efficient performance state from the EM @@ -379,6 +381,12 @@ struct em_perf_state *em_perf_state_from_pd(struct em_perf_domain *pd) { return NULL; } +static inline +int em_dev_compute_costs(struct device *dev, struct em_perf_state *table, + int nr_states) +{ + return -EINVAL; +} #endif #endif |