schedule: userspace: DP: make scheduler_dp_ll_tick() a syscall

scheduler_dp_ll_tick(() has to recalculate DP deadlines and
reschedule DP threads. Make it a syscall to be able to call it from
the userspace LL scheduler.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

src/include/sof/schedule/dp_schedule.h

@@ -78,7 +78,11 @@ int scheduler_dp_task_init(struct task **task,
 			   uint16_t core,
 			   size_t stack_size,
 			   uint32_t options);
-void scheduler_dp_ll_tick(void);
+
+#if defined(__ZEPHYR__) && CONFIG_SOF_FULL_ZEPHYR_APPLICATION
+__syscall void scheduler_dp_ll_tick(unsigned int core);
+#include <zephyr/syscalls/dp_schedule.h>
+#endif
 
 /**
  * \brief Extract information about scheduler's tasks

src/schedule/zephyr_dp_schedule.c

@@ -222,22 +222,35 @@ static enum task_state scheduler_dp_ll_tick_dummy(void *data)
  * needed 1.2ms for processing - but the example would be too complicated)
  */
 
-void scheduler_dp_ll_tick(void)
+void z_impl_scheduler_dp_ll_tick(unsigned int core)
 {
 	unsigned int lock_key;
+#ifndef CONFIG_SOF_USERSPACE_LL
 	struct scheduler_dp_data *dp_sch = scheduler_get_data(SOF_SCHEDULE_DP);
+#else
+	struct scheduler_dp_data *dp_sch = scheduler_get_data_for_core(SOF_SCHEDULE_DP, core);
+#endif
 
 	if (!dp_sch)
 		return;
 
 	/* remember current timestamp as "NOW" */
 	dp_sch->last_ll_tick_timestamp = k_cycle_get_32();
 
-	lock_key = scheduler_dp_lock(cpu_get_id());
+	lock_key = scheduler_dp_lock(core);
 	scheduler_dp_recalculate(dp_sch);
 	scheduler_dp_unlock(lock_key);
 }
 
+#ifdef CONFIG_USERSPACE
+#include <zephyr/internal/syscall_handler.h>
+void z_vrfy_scheduler_dp_ll_tick(unsigned int core)
+{
+	z_impl_scheduler_dp_ll_tick(core);
+}
+#include <zephyr/syscalls/scheduler_dp_ll_tick_mrsh.c>
+#endif
+
 #if CONFIG_SOF_USERSPACE_APPLICATION
 static int scheduler_dp_task_cancel(void *data, struct task *task)
 {

src/schedule/zephyr_ll.c

@@ -344,7 +344,7 @@ static void zephyr_ll_run(void *data)
 
 	zephyr_ll_unlock(sch, &flags);
 
-	scheduler_dp_ll_tick();
+	scheduler_dp_ll_tick(sch->core);
 }
 
 static void schedule_ll_callback(void *data)

zephyr/CMakeLists.txt

@@ -631,6 +631,7 @@ zephyr_syscall_header(${SOF_SRC_PATH}/include/sof/lib/vregion.h)
 zephyr_library_sources(syscall/vregion.c)
 zephyr_syscall_header(${SOF_SRC_PATH}/include/sof/lib/dai-zephyr.h)
 zephyr_syscall_header(${SOF_SRC_PATH}/include/sof/lib_manager.h)
+zephyr_syscall_header(${SOF_SRC_PATH}/include/sof/schedule/dp_schedule.h)
 zephyr_library_sources_ifdef(CONFIG_USERSPACE syscall/dai.c)
 
 zephyr_syscall_header(${SOF_SRC_PATH}/include/user/debug_stream_slot.h)