1 files changed, 106 insertions, 0 deletions
diff --git a/qdf/inc/qdf_cpuhp.h b/qdf/inc/qdf_cpuhp.h
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index 000000000000..ace5e0f3b2db
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+++ b/qdf/inc/qdf_cpuhp.h
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+/*
+ * Copyright (c) 2017-2018 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * DOC: qdf_cpuhp (CPU hotplug)
+ * QCA driver framework (QDF) CPU hotplug APIs
+ */
+
+#ifndef __QDF_CPUHP_H
+#define __QDF_CPUHP_H
+
+#include "qdf_status.h"
+#include "qdf_types.h"
+
+/**
+ * struct qdf_cpuhp_handler - an opaque hotplug event registration handle
+ */
+struct qdf_cpuhp_handler;
+
+typedef void (*qdf_cpuhp_callback)(void *context, uint32_t cpu);
+
+#ifdef QCA_CONFIG_SMP
+/**
+ * qdf_cpuhp_init() - Initialize the CPU hotplug event infrastructure
+ *
+ * To be called once, globally.
+ *
+ * Return: None
+ */
+QDF_STATUS qdf_cpuhp_init(void);
+
+/**
+ * qdf_cpuhp_deinit() - De-initialize the CPU hotplug event infrastructure
+ *
+ * To be called once, globally.
+ *
+ * Return: None
+ */
+QDF_STATUS qdf_cpuhp_deinit(void);
+
+/**
+ * qdf_cpuhp_register() - Register for CPU up/down event notifications
+ * @handler: a double pointer to the event registration handle to allocate
+ * @context: an opaque context to pass back to event listeners
+ * @up_callback: the function pointer to invoke for CPU up events
+ * @down_callback: the function pointer to invoke for CPU down events
+ *
+ * "Up" happens just after the CPU is up. Inversely, "down" happens just before
+ * the CPU goes down.
+ *
+ * @handler will point to a valid memory address on success, or NULL on failure.
+ *
+ * Return: QDF_STATUS
+ */
+QDF_STATUS qdf_cpuhp_register(struct qdf_cpuhp_handler **handler,
+			      void *context,
+			      qdf_cpuhp_callback up_callback,
+			      qdf_cpuhp_callback down_callback);
+
+/**
+ * qdf_cpuhp_unregister() - Un-register for CPU up/down event notifications
+ * @handler: a double pointer to the event registration handle to de-allocate
+ *
+ * @handler point to NULL upon completion
+ *
+ * Return: None
+ */
+void qdf_cpuhp_unregister(struct qdf_cpuhp_handler **handler);
+#else
+QDF_STATUS qdf_cpuhp_init(void)
+{
+	return QDF_STATUS_SUCCESS;
+}
+
+QDF_STATUS qdf_cpuhp_deinit(void)
+{
+	return QDF_STATUS_SUCCESS;
+}
+
+QDF_STATUS qdf_cpuhp_register(struct qdf_cpuhp_handler **handler,
+			      void *context,
+			      qdf_cpuhp_callback up_callback,
+			      qdf_cpuhp_callback down_callback)
+{
+	return QDF_STATUS_SUCCESS;
+}
+
+void qdf_cpuhp_unregister(struct qdf_cpuhp_handler **handler) {}
+#endif /* QCA_CONFIG_SMP */
+
+#endif /* __QDF_CPUHP_H */