notifier: add notifier to core_context

Adds notifier to core_context, which is the first step
of multicore notifier implementation.

Signed-off-by: Tomasz Lauda <tomasz.lauda@linux.intel.com>

src/arch/xtensa/Makefile.am

@@ -54,6 +54,7 @@ sof_SOURCES += \
 	smp/xtos/_vectors.S \
 	smp/cpu.c \
 	smp/init.c \
+	smp/notifier.c \
 	smp/schedule.c \
 	smp/task.c \
 	smp/work.c
@@ -63,6 +64,7 @@ sof_SOURCES += \
 	up/xtos/_vectors.S \
 	up/cpu.c \
 	up/init.c \
+	up/notifier.c \
 	up/schedule.c \
 	up/task.c \
 	up/work.c

src/arch/xtensa/smp/cpu.c

@@ -107,6 +107,8 @@ void cpu_power_down_core(void)
 
 	free_system_workq();
 
+	free_system_notify();
+
 	/* free entire sys heap, an instance dedicated for this core */
 	free_heap(RZONE_SYS);
 

src/arch/xtensa/smp/notifier.c

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2018, Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of the Intel Corporation nor the
+ *     names of its contributors may be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Author: Tomasz Lauda <tomasz.lauda@linux.intel.com>
+ *
+ */
+
+/**
+ * \file arch/xtensa/smp/notifier.c
+ * \brief Xtensa SMP notifier implementation file
+ * \authors Tomasz Lauda <tomasz.lauda@linux.intel.com>
+ */
+
+#include <xtos-structs.h>
+#include <arch/cpu.h>
+#include <sof/notifier.h>
+
+struct notify **arch_notify_get(void)
+{
+	struct core_context *ctx = (struct core_context *)cpu_read_threadptr();
+
+	return &ctx->notify;
+}

src/arch/xtensa/smp/xtos/xtos-structs.h

@@ -35,6 +35,7 @@
 
 struct idc;
 struct irq_task;
+struct notify;
 struct schedule_data;
 struct work_queue;
 
@@ -59,6 +60,7 @@ struct core_context {
 	struct irq_task *irq_high_task;
 	struct schedule_data *sch;
 	struct work_queue *queue;
+	struct notify *notify;
 	struct idc *idc;
 };
 

src/arch/xtensa/up/notifier.c

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2018, Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of the Intel Corporation nor the
+ *     names of its contributors may be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Author: Tomasz Lauda <tomasz.lauda@linux.intel.com>
+ *
+ */
+
+/**
+ * \file arch/xtensa/up/notifier.c
+ * \brief Xtensa UP notifier implementation file
+ * \authors Tomasz Lauda <tomasz.lauda@linux.intel.com>
+ */
+
+#include <sof/notifier.h>
+
+/** \brief Notify data pointer. */
+static struct notify *notify;
+
+struct notify **arch_notify_get(void)
+{
+	return &notify;
+}

src/include/sof/notifier.h

@@ -33,6 +33,7 @@
 
 #include <stdint.h>
 #include <sof/list.h>
+#include <sof/lock.h>
 
 struct sof;
 
@@ -40,6 +41,11 @@ struct sof;
 #define NOTIFIER_ID_CPU_FREQ	0
 #define NOTIFIER_ID_SSP_FREQ	1
 
+struct notify {
+	spinlock_t lock;	/* notifier lock */
+	struct list_item list;	/* list of notifiers */
+};
+
 struct notifier {
 	uint32_t id;
 	struct list_item list;
@@ -47,6 +53,8 @@ struct notifier {
 	void (*cb)(int message, void *cb_data, void *event_data);
 };
 
+struct notify **arch_notify_get(void);
+
 void notifier_register(struct notifier *notifier);
 void notifier_unregister(struct notifier *notifier);
 
@@ -54,4 +62,6 @@ void notifier_event(int id, int message, void *event_data);
 
 void init_system_notify(struct sof *sof);
 
+void free_system_notify(void);
+
 #endif

src/init/init.c

@@ -100,6 +100,9 @@ int slave_core_init(struct sof *sof)
 	if (err < 0)
 		panic(SOF_IPC_PANIC_ARCH);
 
+	trace_point(TRACE_BOOT_SYS_NOTE);
+	init_system_notify(sof);
+
 	trace_point(TRACE_BOOT_SYS_SCHED);
 	scheduler_init(sof);
 

src/lib/notifier.c

@@ -30,44 +30,40 @@
 
 #include <sof/notifier.h>
 #include <sof/sof.h>
-#include <sof/lock.h>
 #include <sof/list.h>
-
-/* General purpose notifiers */
-
-struct notify {
-	spinlock_t lock;
-	struct list_item list;	/* list of notifiers */
-};
-
-static struct notify _notify;
+#include <sof/alloc.h>
 
 void notifier_register(struct notifier *notifier)
 {
-	spin_lock(&_notify.lock);
-	list_item_prepend(&notifier->list, &_notify.list);
-	spin_unlock(&_notify.lock);
+	struct notify *notify = *arch_notify_get();
+
+	spin_lock(&notify->lock);
+	list_item_prepend(&notifier->list, &notify->list);
+	spin_unlock(&notify->lock);
 }
 
 void notifier_unregister(struct notifier *notifier)
 {
-	spin_lock(&_notify.lock);
+	struct notify *notify = *arch_notify_get();
+
+	spin_lock(&notify->lock);
 	list_item_del(&notifier->list);
-	spin_unlock(&_notify.lock);
+	spin_unlock(&notify->lock);
 }
 
 void notifier_event(int id, int message, void *event_data)
 {
+	struct notify *notify = *arch_notify_get();
 	struct list_item *wlist;
 	struct notifier *n;
 
-	spin_lock(&_notify.lock);
+	spin_lock(&notify->lock);
 
-	if (list_is_empty(&_notify.list))
+	if (list_is_empty(&notify->list))
 		goto out;
 
 	/* iterate through notifiers and send event to interested clients */
-	list_for_item(wlist, &_notify.list) {
+	list_for_item(wlist, &notify->list) {
 
 		n = container_of(wlist, struct notifier, list);
 		if (n->id == id)
@@ -75,11 +71,23 @@ void notifier_event(int id, int message, void *event_data)
 	}
 
 out:
-	spin_unlock(&_notify.lock);
+	spin_unlock(&notify->lock);
 }
 
 void init_system_notify(struct sof *sof)
 {
-	list_init(&_notify.list);
-	spinlock_init(&_notify.lock);
+	struct notify **notify = arch_notify_get();
+	*notify = rzalloc(RZONE_SYS, SOF_MEM_CAPS_RAM, sizeof(**notify));
+
+	list_init(&(*notify)->list);
+	spinlock_init(&(*notify)->lock);
+}
+
+void free_system_notify(void)
+{
+	struct notify *notify = *arch_notify_get();
+
+	spin_lock(&notify->lock);
+	list_item_del(&notify->list);
+	spin_unlock(&notify->lock);
 }

src/lib/work.c

@@ -501,13 +501,11 @@ struct work_queue *work_new_queue(struct work_queue_timesource *ts)
 	/* TODO: configurable through IPC */
 	queue->timeout = PLATFORM_WORKQ_DEFAULT_TIMEOUT;
 
-	if (cpu_get_id() == PLATFORM_MASTER_CORE_ID) {
-		/* notification of clk changes */
-		queue->notifier.cb = work_notify;
-		queue->notifier.cb_data = queue;
-		queue->notifier.id = ts->notifier;
-		notifier_register(&queue->notifier);
-	}
+	/* notification of clk changes */
+	queue->notifier.cb = work_notify;
+	queue->notifier.cb_data = queue;
+	queue->notifier.id = ts->notifier;
+	notifier_register(&queue->notifier);
 
 	/* register system timer */
 	timer_register(&queue->ts->timer, queue_run, queue);
@@ -539,8 +537,7 @@ void free_system_workq(void)
 
 	timer_unregister(&(*queue)->ts->timer);
 
-	if (cpu_get_id() == PLATFORM_MASTER_CORE_ID)
-		notifier_unregister(&(*queue)->notifier);
+	notifier_unregister(&(*queue)->notifier);
 
 	list_item_del(&(*queue)->work);