// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
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/*
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*
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* (C) COPYRIGHT 2020-2021 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU license.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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*/
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#include "mali_kbase_ccswe.h"
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#include "mali_kbase_linux.h"
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#include <linux/math64.h>
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#include <linux/time.h>
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static u64 kbasep_ccswe_cycle_at_no_lock(
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struct kbase_ccswe *self, u64 timestamp_ns)
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{
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s64 diff_s, diff_ns;
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u32 gpu_freq;
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lockdep_assert_held(&self->access);
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diff_ns = timestamp_ns - self->timestamp_ns;
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gpu_freq = diff_ns > 0 ? self->gpu_freq : self->prev_gpu_freq;
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diff_s = div_s64(diff_ns, NSEC_PER_SEC);
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diff_ns -= diff_s * NSEC_PER_SEC;
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return self->cycles_elapsed + diff_s * gpu_freq
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+ div_s64(diff_ns * gpu_freq, NSEC_PER_SEC);
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}
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void kbase_ccswe_init(struct kbase_ccswe *self)
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{
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memset(self, 0, sizeof(*self));
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spin_lock_init(&self->access);
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}
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u64 kbase_ccswe_cycle_at(struct kbase_ccswe *self, u64 timestamp_ns)
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{
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unsigned long flags;
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u64 result;
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spin_lock_irqsave(&self->access, flags);
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result = kbasep_ccswe_cycle_at_no_lock(self, timestamp_ns);
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spin_unlock_irqrestore(&self->access, flags);
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return result;
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}
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void kbase_ccswe_freq_change(
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struct kbase_ccswe *self, u64 timestamp_ns, u32 gpu_freq)
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{
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unsigned long flags;
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spin_lock_irqsave(&self->access, flags);
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/* The time must go only forward. */
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if (WARN_ON(timestamp_ns < self->timestamp_ns))
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goto exit;
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/* If this is the first frequency change, cycles_elapsed is zero. */
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if (self->timestamp_ns)
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self->cycles_elapsed = kbasep_ccswe_cycle_at_no_lock(
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self, timestamp_ns);
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self->timestamp_ns = timestamp_ns;
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self->prev_gpu_freq = self->gpu_freq;
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self->gpu_freq = gpu_freq;
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exit:
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spin_unlock_irqrestore(&self->access, flags);
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}
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void kbase_ccswe_reset(struct kbase_ccswe *self)
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{
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unsigned long flags;
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spin_lock_irqsave(&self->access, flags);
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self->timestamp_ns = 0;
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self->cycles_elapsed = 0;
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self->gpu_freq = 0;
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self->prev_gpu_freq = 0;
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spin_unlock_irqrestore(&self->access, flags);
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}
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