| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| /* |
| * |
| * (C) COPYRIGHT 2020-2021 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 license. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, you can access it online at |
| * http://www.gnu.org/licenses/gpl-2.0.html. |
| * |
| */ |
| |
| #ifndef _KBASE_CLK_RATE_TRACE_MGR_ |
| #define _KBASE_CLK_RATE_TRACE_MGR_ |
| |
| /* The index of top clock domain in kbase_clk_rate_trace_manager:clks. */ |
| #define KBASE_CLOCK_DOMAIN_TOP (0) |
| |
| /* The index of shader-cores clock domain in |
| * kbase_clk_rate_trace_manager:clks. |
| */ |
| #define KBASE_CLOCK_DOMAIN_SHADER_CORES (1) |
| |
| /** |
| * struct kbase_clk_data - Data stored per enumerated GPU clock. |
| * |
| * @clk_rtm: Pointer to clock rate trace manager object. |
| * @gpu_clk_handle: Handle unique to the enumerated GPU clock. |
| * @plat_private: Private data for the platform to store into |
| * @clk_rate_change_nb: notifier block containing the pointer to callback |
| * function that is invoked whenever the rate of |
| * enumerated GPU clock changes. |
| * @clock_val: Current rate of the enumerated GPU clock. |
| * @index: Index at which the GPU clock was enumerated. |
| */ |
| struct kbase_clk_data { |
| struct kbase_clk_rate_trace_manager *clk_rtm; |
| void *gpu_clk_handle; |
| void *plat_private; |
| struct notifier_block clk_rate_change_nb; |
| unsigned long clock_val; |
| u8 index; |
| }; |
| |
| /** |
| * kbase_clk_rate_trace_manager_init - Initialize GPU clock rate trace manager. |
| * |
| * @kbdev: Device pointer |
| * |
| * Return: 0 if success, or an error code on failure. |
| */ |
| int kbase_clk_rate_trace_manager_init(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_clk_rate_trace_manager_term - Terminate GPU clock rate trace manager. |
| * |
| * @kbdev: Device pointer |
| */ |
| void kbase_clk_rate_trace_manager_term(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_clk_rate_trace_manager_gpu_active - Inform GPU clock rate trace |
| * manager of GPU becoming active. |
| * |
| * @kbdev: Device pointer |
| */ |
| void kbase_clk_rate_trace_manager_gpu_active(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_clk_rate_trace_manager_gpu_idle - Inform GPU clock rate trace |
| * manager of GPU becoming idle. |
| * @kbdev: Device pointer |
| */ |
| void kbase_clk_rate_trace_manager_gpu_idle(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_clk_rate_trace_manager_subscribe_no_lock() - Add freq change listener. |
| * |
| * @clk_rtm: Clock rate manager instance. |
| * @listener: Listener handle |
| * |
| * kbase_clk_rate_trace_manager:lock must be held by the caller. |
| */ |
| static inline void kbase_clk_rate_trace_manager_subscribe_no_lock( |
| struct kbase_clk_rate_trace_manager *clk_rtm, |
| struct kbase_clk_rate_listener *listener) |
| { |
| lockdep_assert_held(&clk_rtm->lock); |
| list_add(&listener->node, &clk_rtm->listeners); |
| } |
| |
| /** |
| * kbase_clk_rate_trace_manager_subscribe() - Add freq change listener. |
| * |
| * @clk_rtm: Clock rate manager instance. |
| * @listener: Listener handle |
| */ |
| static inline void kbase_clk_rate_trace_manager_subscribe( |
| struct kbase_clk_rate_trace_manager *clk_rtm, |
| struct kbase_clk_rate_listener *listener) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&clk_rtm->lock, flags); |
| kbase_clk_rate_trace_manager_subscribe_no_lock( |
| clk_rtm, listener); |
| spin_unlock_irqrestore(&clk_rtm->lock, flags); |
| } |
| |
| /** |
| * kbase_clk_rate_trace_manager_unsubscribe() - Remove freq change listener. |
| * |
| * @clk_rtm: Clock rate manager instance. |
| * @listener: Listener handle |
| */ |
| static inline void kbase_clk_rate_trace_manager_unsubscribe( |
| struct kbase_clk_rate_trace_manager *clk_rtm, |
| struct kbase_clk_rate_listener *listener) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&clk_rtm->lock, flags); |
| list_del(&listener->node); |
| spin_unlock_irqrestore(&clk_rtm->lock, flags); |
| } |
| |
| /** |
| * kbase_clk_rate_trace_manager_notify_all() - Notify all clock \ |
| * rate listeners. |
| * |
| * @clk_rtm: Clock rate manager instance. |
| * @clock_index: Clock index. |
| * @new_rate: New clock frequency(Hz) |
| * |
| * kbase_clk_rate_trace_manager:lock must be locked. |
| * This function is exported to be used by clock rate trace test |
| * portal. |
| */ |
| void kbase_clk_rate_trace_manager_notify_all( |
| struct kbase_clk_rate_trace_manager *clk_rtm, |
| u32 clock_index, |
| unsigned long new_rate); |
| |
| #endif /* _KBASE_CLK_RATE_TRACE_MGR_ */ |
| |