/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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*
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* (C) COPYRIGHT 2020-2022 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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#ifndef _KBASE_CLK_RATE_TRACE_MGR_
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#define _KBASE_CLK_RATE_TRACE_MGR_
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/* The index of top clock domain in kbase_clk_rate_trace_manager:clks. */
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#define KBASE_CLOCK_DOMAIN_TOP (0)
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/* The index of shader-cores clock domain in
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* kbase_clk_rate_trace_manager:clks.
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*/
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#define KBASE_CLOCK_DOMAIN_SHADER_CORES (1)
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/**
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* struct kbase_clk_data - Data stored per enumerated GPU clock.
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*
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* @clk_rtm: Pointer to clock rate trace manager object.
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* @gpu_clk_handle: Handle unique to the enumerated GPU clock.
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* @plat_private: Private data for the platform to store into
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* @clk_rate_change_nb: notifier block containing the pointer to callback
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* function that is invoked whenever the rate of
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* enumerated GPU clock changes.
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* @clock_val: Current rate of the enumerated GPU clock.
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* @index: Index at which the GPU clock was enumerated.
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*/
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struct kbase_clk_data {
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struct kbase_clk_rate_trace_manager *clk_rtm;
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void *gpu_clk_handle;
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void *plat_private;
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struct notifier_block clk_rate_change_nb;
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unsigned long clock_val;
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u8 index;
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};
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/**
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* kbase_clk_rate_trace_manager_init - Initialize GPU clock rate trace manager.
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*
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* @kbdev: Device pointer
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*
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* Return: 0 if success, or an error code on failure.
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*/
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int kbase_clk_rate_trace_manager_init(struct kbase_device *kbdev);
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/**
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* kbase_clk_rate_trace_manager_term - Terminate GPU clock rate trace manager.
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*
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* @kbdev: Device pointer
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*/
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void kbase_clk_rate_trace_manager_term(struct kbase_device *kbdev);
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/**
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* kbase_clk_rate_trace_manager_gpu_active - Inform GPU clock rate trace
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* manager of GPU becoming active.
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*
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* @kbdev: Device pointer
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*/
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void kbase_clk_rate_trace_manager_gpu_active(struct kbase_device *kbdev);
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/**
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* kbase_clk_rate_trace_manager_gpu_idle - Inform GPU clock rate trace
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* manager of GPU becoming idle.
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* @kbdev: Device pointer
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*/
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void kbase_clk_rate_trace_manager_gpu_idle(struct kbase_device *kbdev);
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/**
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* kbase_clk_rate_trace_manager_subscribe_no_lock() - Add freq change listener.
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*
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* @clk_rtm: Clock rate manager instance.
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* @listener: Listener handle
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*
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* kbase_clk_rate_trace_manager:lock must be held by the caller.
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*/
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static inline void kbase_clk_rate_trace_manager_subscribe_no_lock(
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struct kbase_clk_rate_trace_manager *clk_rtm,
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struct kbase_clk_rate_listener *listener)
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{
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lockdep_assert_held(&clk_rtm->lock);
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list_add(&listener->node, &clk_rtm->listeners);
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}
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/**
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* kbase_clk_rate_trace_manager_subscribe() - Add freq change listener.
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*
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* @clk_rtm: Clock rate manager instance.
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* @listener: Listener handle
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*/
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static inline void kbase_clk_rate_trace_manager_subscribe(
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struct kbase_clk_rate_trace_manager *clk_rtm,
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struct kbase_clk_rate_listener *listener)
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{
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unsigned long flags;
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spin_lock_irqsave(&clk_rtm->lock, flags);
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kbase_clk_rate_trace_manager_subscribe_no_lock(
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clk_rtm, listener);
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spin_unlock_irqrestore(&clk_rtm->lock, flags);
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}
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/**
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* kbase_clk_rate_trace_manager_unsubscribe() - Remove freq change listener.
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*
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* @clk_rtm: Clock rate manager instance.
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* @listener: Listener handle
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*/
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static inline void kbase_clk_rate_trace_manager_unsubscribe(
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struct kbase_clk_rate_trace_manager *clk_rtm,
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struct kbase_clk_rate_listener *listener)
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{
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unsigned long flags;
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spin_lock_irqsave(&clk_rtm->lock, flags);
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list_del(&listener->node);
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spin_unlock_irqrestore(&clk_rtm->lock, flags);
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}
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/**
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* kbase_clk_rate_trace_manager_notify_all() - Notify all clock \
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* rate listeners.
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*
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* @clk_rtm: Clock rate manager instance.
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* @clock_index: Clock index.
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* @new_rate: New clock frequency(Hz)
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*
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* kbase_clk_rate_trace_manager:lock must be locked.
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* This function is exported to be used by clock rate trace test
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* portal.
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*/
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void kbase_clk_rate_trace_manager_notify_all(
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struct kbase_clk_rate_trace_manager *clk_rtm,
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u32 clock_index,
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unsigned long new_rate);
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#endif /* _KBASE_CLK_RATE_TRACE_MGR_ */
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