diff options
Diffstat (limited to 'drivers/gpu/arm/midgard/backend/gpu/mali_kbase_pm_ca_devfreq.c')
| -rw-r--r-- | drivers/gpu/arm/midgard/backend/gpu/mali_kbase_pm_ca_devfreq.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/gpu/arm/midgard/backend/gpu/mali_kbase_pm_ca_devfreq.c b/drivers/gpu/arm/midgard/backend/gpu/mali_kbase_pm_ca_devfreq.c new file mode 100644 index 000000000000..66bf660cffb6 --- /dev/null +++ b/drivers/gpu/arm/midgard/backend/gpu/mali_kbase_pm_ca_devfreq.c @@ -0,0 +1,129 @@ +/* + * + * (C) COPYRIGHT 2017 ARM Limited. All rights reserved. + * + * This program is free software and is provided to you under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation, and any use by you of this program is subject to the terms + * of such GNU licence. + * + * A copy of the licence is included with the program, and can also be obtained + * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + + + +/* + * A core availability policy implementing core mask selection from devfreq OPPs + * + */ + +#include <mali_kbase.h> +#include <mali_kbase_pm.h> +#include <backend/gpu/mali_kbase_pm_internal.h> +#include <linux/version.h> + +void kbase_devfreq_set_core_mask(struct kbase_device *kbdev, u64 core_mask) +{ + struct kbasep_pm_ca_policy_devfreq *data = + &kbdev->pm.backend.ca_policy_data.devfreq; + unsigned long flags; + + spin_lock_irqsave(&kbdev->hwaccess_lock, flags); + + data->cores_desired = core_mask; + + /* Disable any cores that are now unwanted */ + data->cores_enabled &= data->cores_desired; + + kbdev->pm.backend.ca_in_transition = true; + + /* If there are no cores to be powered off then power on desired cores + */ + if (!(data->cores_used & ~data->cores_desired)) { + data->cores_enabled = data->cores_desired; + kbdev->pm.backend.ca_in_transition = false; + } + + kbase_pm_update_cores_state_nolock(kbdev); + + spin_unlock_irqrestore(&kbdev->hwaccess_lock, flags); + + dev_dbg(kbdev->dev, "Devfreq policy : new core mask=%llX %llX\n", + data->cores_desired, data->cores_enabled); +} + +static void devfreq_init(struct kbase_device *kbdev) +{ + struct kbasep_pm_ca_policy_devfreq *data = + &kbdev->pm.backend.ca_policy_data.devfreq; + + if (kbdev->current_core_mask) { + data->cores_enabled = kbdev->current_core_mask; + data->cores_desired = kbdev->current_core_mask; + } else { + data->cores_enabled = + kbdev->gpu_props.props.raw_props.shader_present; + data->cores_desired = + kbdev->gpu_props.props.raw_props.shader_present; + } + data->cores_used = 0; + kbdev->pm.backend.ca_in_transition = false; +} + +static void devfreq_term(struct kbase_device *kbdev) +{ +} + +static u64 devfreq_get_core_mask(struct kbase_device *kbdev) +{ + return kbdev->pm.backend.ca_policy_data.devfreq.cores_enabled; +} + +static void devfreq_update_core_status(struct kbase_device *kbdev, + u64 cores_ready, + u64 cores_transitioning) +{ + struct kbasep_pm_ca_policy_devfreq *data = + &kbdev->pm.backend.ca_policy_data.devfreq; + + lockdep_assert_held(&kbdev->hwaccess_lock); + + data->cores_used = cores_ready | cores_transitioning; + + /* If in desired state then clear transition flag */ + if (data->cores_enabled == data->cores_desired) + kbdev->pm.backend.ca_in_transition = false; + + /* If all undesired cores are now off then power on desired cores. + * The direct comparison against cores_enabled limits potential + * recursion to one level */ + if (!(data->cores_used & ~data->cores_desired) && + data->cores_enabled != data->cores_desired) { + data->cores_enabled = data->cores_desired; + + kbase_pm_update_cores_state_nolock(kbdev); + + kbdev->pm.backend.ca_in_transition = false; + } +} + +/* + * The struct kbase_pm_ca_policy structure for the devfreq core availability + * policy. + * + * This is the static structure that defines the devfreq core availability power + * policy's callback and name. + */ +const struct kbase_pm_ca_policy kbase_pm_ca_devfreq_policy_ops = { + "devfreq", /* name */ + devfreq_init, /* init */ + devfreq_term, /* term */ + devfreq_get_core_mask, /* get_core_mask */ + devfreq_update_core_status, /* update_core_status */ + 0u, /* flags */ + KBASE_PM_CA_POLICY_ID_DEVFREQ, /* id */ +}; + |