From 1543e317f1da31b75942316931e8f491a8920811 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 04 Jan 2024 10:08:02 +0000
Subject: [PATCH] disable FB
---
kernel/drivers/gpu/arm/bifrost/mali_kbase_hwaccess_time.h | 78 ++++++++++++++++++++++++++++++++++++++
1 files changed, 77 insertions(+), 1 deletions(-)
diff --git a/kernel/drivers/gpu/arm/bifrost/mali_kbase_hwaccess_time.h b/kernel/drivers/gpu/arm/bifrost/mali_kbase_hwaccess_time.h
index 8a4ece4..ac2a26d 100644
--- a/kernel/drivers/gpu/arm/bifrost/mali_kbase_hwaccess_time.h
+++ b/kernel/drivers/gpu/arm/bifrost/mali_kbase_hwaccess_time.h
@@ -1,7 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
*
- * (C) COPYRIGHT 2014, 2018-2021 ARM Limited. All rights reserved.
+ * (C) COPYRIGHT 2014, 2018-2021, 2023 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
@@ -21,6 +21,49 @@
#ifndef _KBASE_BACKEND_TIME_H_
#define _KBASE_BACKEND_TIME_H_
+
+#if MALI_USE_CSF
+/**
+ * struct kbase_backend_time - System timestamp attributes.
+ *
+ * @multiplier: Numerator of the converter's fraction.
+ * @divisor: Denominator of the converter's fraction.
+ * @offset: Converter's offset term.
+ *
+ * According to Generic timer spec, system timer:
+ * - Increments at a fixed frequency
+ * - Starts operating from zero
+ *
+ * Hence CPU time is a linear function of System Time.
+ *
+ * CPU_ts = alpha * SYS_ts + beta
+ *
+ * Where
+ * - alpha = 10^9/SYS_ts_freq
+ * - beta is calculated by two timer samples taken at the same time:
+ * beta = CPU_ts_s - SYS_ts_s * alpha
+ *
+ * Since alpha is a rational number, we minimizing possible
+ * rounding error by simplifying the ratio. Thus alpha is stored
+ * as a simple `multiplier / divisor` ratio.
+ *
+ */
+struct kbase_backend_time {
+ u64 multiplier;
+ u64 divisor;
+ s64 offset;
+};
+
+/**
+ * kbase_backend_time_convert_gpu_to_cpu() - Convert GPU timestamp to CPU timestamp.
+ *
+ * @kbdev: Kbase device pointer
+ * @gpu_ts: System timestamp value to converter.
+ *
+ * Return: The CPU timestamp.
+ */
+u64 __maybe_unused kbase_backend_time_convert_gpu_to_cpu(struct kbase_device *kbdev, u64 gpu_ts);
+#endif
/**
* kbase_backend_get_gpu_time() - Get current GPU time
@@ -46,5 +89,38 @@
u64 *cycle_counter,
u64 *system_time,
struct timespec64 *ts);
+/**
+ * kbase_get_timeout_ms - Choose a timeout value to get a timeout scaled
+ * GPU frequency, using a choice from
+ * kbase_timeout_selector.
+ *
+ * @kbdev: KBase device pointer.
+ * @selector: Value from kbase_scaled_timeout_selector enum.
+ *
+ * Return: Timeout in milliseconds, as an unsigned integer.
+ */
+unsigned int kbase_get_timeout_ms(struct kbase_device *kbdev,
+ enum kbase_timeout_selector selector);
+
+/**
+ * kbase_backend_get_cycle_cnt - Reads the GPU cycle counter
+ *
+ * @kbdev: Instance of a GPU platform device that implements a CSF interface.
+ *
+ * Return: Snapshot of the GPU cycle count register.
+ */
+u64 kbase_backend_get_cycle_cnt(struct kbase_device *kbdev);
+
+/**
+ * kbase_backend_time_init() - Initialize system timestamp converter.
+ *
+ * @kbdev: Kbase device pointer
+ *
+ * This function should only be called after GPU is powered-up and
+ * L2 cached power-up has been initiated.
+ *
+ * Return: Zero on success, error code otherwise.
+ */
+int kbase_backend_time_init(struct kbase_device *kbdev);
#endif /* _KBASE_BACKEND_TIME_H_ */
--
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