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

/* Broadcom FlexRM Mailbox Driver
 *
 * 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 version 2 as
 * published by the Free Software Foundation.
 *
 * 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>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mailbox_controller.h>
#include <linux/mailbox_client.h>
#include <linux/mailbox/brcm-message.h>
#include <linux/module.h>
#include <linux/msi.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>

/* ====== FlexRM register defines ===== */

/* FlexRM configuration */
#define RING_REGS_S