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/*
*
* (C) COPYRIGHT 2013 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.
*
*/
/**
* @file mali_kbase_pm_ca.c
* Base kernel core availability APIs
*/
#include <kbase/src/common/mali_kbase.h>
#include <kbase/src/common/mali_kbase_pm.h>
extern const kbase_pm_ca_policy kbase_pm_ca_fixed_policy_ops;
#if MALI_CUSTOMER_RELEASE == 0
extern const kbase_pm_ca_policy kbase_pm_ca_random_policy_ops;
#endif
static const kbase_pm_ca_policy *const policy_list[] = {
&kbase_pm_ca_fixed_policy_ops,
#if MALI_CUSTOMER_RELEASE == 0
&kbase_pm_ca_random_policy_ops
#endif
};
/** The number of policies available in the system.
* This is derived from the number of functions listed in policy_get_functions.
*/
#define POLICY_COUNT (sizeof(policy_list)/sizeof(*policy_list))
mali_error kbase_pm_ca_init(kbase_device *kbdev)
{
KBASE_DEBUG_ASSERT(kbdev != NULL);
kbdev->pm.ca_current_policy = policy_list[0];
kbdev->pm.ca_current_policy->init(kbdev);
return MALI_ERROR_NONE;
}
void kbase_pm_ca_term(kbase_device *kbdev)
{
kbdev->pm.ca_current_policy->term(kbdev);
}
int kbase_pm_ca_list_policies(const kbase_pm_ca_policy * const **list)
{
if (!list)
return POLICY_COUNT;
*list = policy_list;
return POLICY_COUNT;
}
KBASE_EXPORT_TEST_API(kbase_pm_ca_list_policies)
const kbase_pm_ca_policy *kbase_pm_ca_get_policy(kbase_device *kbdev)
{
KBASE_DEBUG_ASSERT(kbdev != NULL);
return kbdev->pm.ca_current_policy;
}
KBASE_EXPORT_TEST_API(kbase_pm_ca_get_policy)
void kbase_pm_ca_set_policy(kbase_device *kbdev, const kbase_pm_ca_policy *new_policy)
{
const kbase_pm_ca_policy *old_policy;
unsigned long flags;
KBASE_DEBUG_ASSERT(kbdev != NULL);
KBASE_DEBUG_ASSERT(new_policy != NULL);
KBASE_TRACE_ADD(kbdev, PM_CA_SET_POLICY, NULL, NULL, 0u, new_policy->id);
/* During a policy change we pretend the GPU is active */
/* A suspend won't happen here, because we're in a syscall from a userspace thread */
kbase_pm_context_active(kbdev);
mutex_lock(&kbdev->pm.lock);
/* Remove the policy to prevent IRQ handlers from working on it */
spin_lock_irqsave(&kbdev->pm.power_change_lock, flags);
old_policy = kbdev->pm.ca_current_policy;
kbdev->pm.ca_current_policy = NULL;
spin_unlock_irqrestore(&kbdev->pm.power_change_lock, flags);
if (old_policy->term)
old_policy->term(kbdev);
if (new_policy->init)
new_policy->init(kbdev);
spin_lock_irqsave(&kbdev->pm.power_change_lock, flags);
kbdev->pm.ca_current_policy = new_policy;
/* If any core power state changes were previously attempted, but couldn't
* be made because the policy was changing (current_policy was NULL), then
* re-try them here. */
kbase_pm_update_cores_state_nolock(kbdev);
kbdev->pm.ca_current_policy->update_core_status(kbdev, kbdev->shader_ready_bitmap, kbdev->shader_transitioning_bitmap);
spin_unlock_irqrestore(&kbdev->pm.power_change_lock, flags);
mutex_unlock(&kbdev->pm.lock);
/* Now the policy change is finished, we release our fake context active reference */
kbase_pm_context_idle(kbdev);
}
KBASE_EXPORT_TEST_API(kbase_pm_ca_set_policy)
u64 kbase_pm_ca_get_core_mask(kbase_device *kbdev)
{
lockdep_assert_held(&kbdev->pm.power_change_lock);
/* All cores must be enabled when instrumentation is in use */
if (kbdev->pm.instr_enabled == MALI_TRUE)
return kbdev->shader_present_bitmap & kbdev->pm.debug_core_mask;
if (kbdev->pm.ca_current_policy == NULL)
return kbdev->shader_present_bitmap & kbdev->pm.debug_core_mask;
return kbdev->pm.ca_current_policy->get_core_mask(kbdev) & kbdev->pm.debug_core_mask;
}
KBASE_EXPORT_TEST_API(kbase_pm_ca_get_core_mask)
void kbase_pm_ca_update_core_status(kbase_device *kbdev, u64 cores_ready, u64 cores_transitioning)
{
lockdep_assert_held(&kbdev->pm.power_change_lock);
if (kbdev->pm.ca_current_policy != NULL)
kbdev->pm.ca_current_policy->update_core_status(kbdev, cores_ready, cores_transitioning);
}
void kbase_pm_ca_instr_enable(struct kbase_device *kbdev)
{
unsigned long flags;
spin_lock_irqsave(&kbdev->pm.power_change_lock, flags);
kbdev->pm.instr_enabled = MALI_TRUE;
kbase_pm_update_cores_state_nolock(kbdev);
spin_unlock_irqrestore(&kbdev->pm.power_change_lock, flags);
}
void kbase_pm_ca_instr_disable(struct kbase_device *kbdev)
{
unsigned long flags;
spin_lock_irqsave(&kbdev->pm.power_change_lock, flags);
kbdev->pm.instr_enabled = MALI_FALSE;
kbase_pm_update_cores_state_nolock(kbdev);
spin_unlock_irqrestore(&kbdev->pm.power_change_lock, flags);
}
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