path: root/drivers/mailbox/bcm-flexrm-mailbox.c

/*
 * Copyright (C) 2017 Broadcom
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

/*
 * Broadcom FlexRM Mailbox Driver
 *
 * Each Broadcom FlexSparx4 offload engine is implemented as an
 * extension to Broadcom FlexRM ring manager. The FlexRM ring
 * manager provides a set of rings which can be used to submit
 * work to a FlexSparx4 offload engine.
 *
 * This driver creates a mailbox controller using a set of FlexRM
 * rings where each mailbox channel represents a separate FlexRM ring.
 */

#include <asm/barrier.h>
#include <asm/byteorder.h>
#include <linux/atomic.h>
#include <linux/bitmap.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h&g