1 files changed, 70 insertions, 0 deletions
diff --git a/bifrost/r25p0/kernel/drivers/gpu/arm/midgard/backend/gpu/mali_kbase_time.c b/bifrost/r25p0/kernel/drivers/gpu/arm/midgard/backend/gpu/mali_kbase_time.c
new file mode 100644
index 0000000..cb10518
--- /dev/null
+++ b/bifrost/r25p0/kernel/drivers/gpu/arm/midgard/backend/gpu/mali_kbase_time.c
@@ -0,0 +1,70 @@
+/*
+ *
+ * (C) COPYRIGHT 2014-2016,2018-2020 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.
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ */
+
+#include <mali_kbase.h>
+#include <mali_kbase_hwaccess_time.h>
+#include <backend/gpu/mali_kbase_device_internal.h>
+#include <backend/gpu/mali_kbase_pm_internal.h>
+
+void kbase_backend_get_gpu_time(struct kbase_device *kbdev, u64 *cycle_counter,
+				u64 *system_time, struct timespec64 *ts)
+{
+	u32 hi1, hi2;
+
+	kbase_pm_request_gpu_cycle_counter(kbdev);
+
+	if (cycle_counter) {
+		/* Read hi, lo, hi to ensure a coherent u64 */
+		do {
+			hi1 = kbase_reg_read(kbdev,
+					     GPU_CONTROL_REG(CYCLE_COUNT_HI));
+			*cycle_counter = kbase_reg_read(kbdev,
+					     GPU_CONTROL_REG(CYCLE_COUNT_LO));
+			hi2 = kbase_reg_read(kbdev,
+					     GPU_CONTROL_REG(CYCLE_COUNT_HI));
+		} while (hi1 != hi2);
+		*cycle_counter |= (((u64) hi1) << 32);
+	}
+
+	if (system_time) {
+		/* Read hi, lo, hi to ensure a coherent u64 */
+		do {
+			hi1 = kbase_reg_read(kbdev,
+					     GPU_CONTROL_REG(TIMESTAMP_HI));
+			*system_time = kbase_reg_read(kbdev,
+					     GPU_CONTROL_REG(TIMESTAMP_LO));
+			hi2 = kbase_reg_read(kbdev,
+					     GPU_CONTROL_REG(TIMESTAMP_HI));
+		} while (hi1 != hi2);
+		*system_time |= (((u64) hi1) << 32);
+	}
+
+	/* Record the CPU's idea of current time */
+	if (ts != NULL)
+#if (KERNEL_VERSION(4, 17, 0) > LINUX_VERSION_CODE)
+		*ts = ktime_to_timespec64(ktime_get_raw());
+#else
+		ktime_get_raw_ts64(ts);
+#endif
+
+	kbase_pm_release_gpu_cycle_counter(kbdev);
+}