gpu: nvgpu: add periodic timer API

move fecs_trace polling from kthread to timer API.

Jira GVSCI-10883

Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Change-Id: I224754b7205f1d0eefdc19a73a98f42e4d3e9d0e
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2700601
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Shashank Singh <shashsingh@nvidia.com>
Reviewed-by: Aparna Das <aparnad@nvidia.com>
GVS: Gerrit_Virtual_Submit

drivers/gpu/nvgpu/include/nvgpu/gr/fecs_trace.h

@@ -28,14 +28,14 @@
 #include <nvgpu/types.h>
 #include <nvgpu/list.h>
 #include <nvgpu/lock.h>
-#include <nvgpu/thread.h>
+#include <nvgpu/periodic_timer.h>
 
 /*
  * If HW circular buffer is getting too many "buffer full" conditions,
  * increasing this constant should help (it drives Linux' internal buffer size).
  */
 #define GK20A_FECS_TRACE_NUM_RECORDS		(1 << 10)
-#define GK20A_FECS_TRACE_FRAME_PERIOD_US	(1000000ULL/60ULL)
+#define GK20A_FECS_TRACE_FRAME_PERIOD_NS	(1000000000ULL/60ULL)
 #define GK20A_FECS_TRACE_PTIMER_SHIFT		5
 
 #define NVGPU_GPU_CTXSW_TAG_SOF                     0x00U
@@ -71,7 +71,7 @@ struct nvgpu_gr_fecs_trace {
 	struct nvgpu_mutex list_lock;
 
 	struct nvgpu_mutex poll_lock;
-	struct nvgpu_thread poll_task;
+	struct nvgpu_periodic_timer poll_timer;
 
 	struct nvgpu_mutex enable_lock;
 	u32 enable_count;

drivers/gpu/nvgpu/include/nvgpu/linux/periodic_timer.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2022, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef NVGPU_LINUX_PERIODIC_TIMER_H
+#define NVGPU_LINUX_PERIODIC_TIMER_H
+
+#include <linux/async.h>
+#include <linux/hrtimer.h>
+
+struct nvgpu_periodic_timer {
+	struct hrtimer timer;
+	void (*fn)(void *arg);
+	void *arg;
+	ktime_t interval;
+	async_cookie_t async_cookie;
+	bool enabled;
+	raw_spinlock_t lock;
+
+};
+
+#endif

drivers/gpu/nvgpu/include/nvgpu/periodic_timer.h

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2022, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef NVGPU_PERIODIC_TIMER_H
+#define NVGPU_PERIODIC_TIMER_H
+
+#ifdef __KERNEL__
+#include <nvgpu/linux/periodic_timer.h>
+#else
+#include <nvgpu/posix/periodic_timer.h>
+#endif
+
+#include <nvgpu/types.h>
+
+/**
+ * @brief Initialize a nvgpu_periodic_timer
+ *
+ * @param timer The timer to be initialized
+ * @param fn Timer callback function, must not be NULL
+ * @param arg The argument of the timer callback function
+ * @return 0 Success
+ * @return -EAGAIN Temporary error during kernel allocation of timer structure
+ * @return -EINVAL OS specific implementation error
+ * @return -ENOMEM out of memory
+ */
+int nvgpu_periodic_timer_init(struct nvgpu_periodic_timer *timer,
+			void (*fn)(void *arg), void *arg);
+/**
+ * @brief start a nvgpu_periodic_timer. Not thread safe.
+ *
+ * @param timer timer to start, must not be NULL
+ * @param interval_ns periodic timer interval in the unit of ns
+ * @return 0 Success
+ * @return -EINVAL invalid timer or interval_ns
+ */
+int nvgpu_periodic_timer_start(struct nvgpu_periodic_timer *timer,
+				u64 interval_ns);
+/**
+ * @brief stop a timer and wait for any timer callback to be finished.
+ * Not thread safe.
+ *
+ * @param timer timer to stop
+ * @return 0 Success
+ * @return -EINVAL invalid timer
+ */
+int nvgpu_periodic_timer_stop(struct nvgpu_periodic_timer *timer);
+/**
+ * @brief destroy a nvgpu_periodic_timer
+ *
+ * @param timer timer to destroy
+ * @return 0 Success
+ * @return -EINVAL invalid timer
+ */
+int nvgpu_periodic_timer_destroy(struct nvgpu_periodic_timer *timer);
+
+#endif

drivers/gpu/nvgpu/include/nvgpu/posix/periodic_timer.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2022, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef NVGPU_POSIX_PERIODIC_TIMER_H
+#define NVGPU_POSIX_PERIODIC_TIMER_H
+
+#include <nvgpu/cond.h>
+#include <signal.h>
+#include <time.h>
+
+struct nvgpu_periodic_timer {
+	timer_t timerid;
+	void (*fn)(void *arg);
+	void *arg;
+	struct itimerspec ts;
+	bool enabled;
+	bool last_run_done;
+	struct nvgpu_cond cond;
+};
+
+#endif