/*
 * Inter-VM Communication
 *
 * Copyright (C) 2014-2015, NVIDIA CORPORATION. All rights reserved.
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2.  This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 *
 */

#ifndef __tegra_ivc_instance_h__
#define  __tegra_ivc_instance_h__

#include <linux/dma-mapping.h>
#include <linux/device.h>

#define IVC_ALIGN 64

struct ivc_channel_header;

struct ivc {
	struct ivc_channel_header *rx_channel, *tx_channel;
	uint32_t w_pos, r_pos;

	void (*notify)(struct ivc *);
	uint32_t nframes, frame_size;

	struct device *peer_device;
	dma_addr_t rx_handle, tx_handle;
};


int tegra_ivc_init(struct ivc *ivc, uintptr_t rx_base, uintptr_t tx_base,
		unsigned nframes, unsigned frame_size,
		struct device *peer_device, void (*notify)(struct ivc *));
int tegra_ivc_init_with_dma_handle(struct ivc *ivc, uintptr_t rx_base,
		dma_addr_t rx_handle, uintptr_t tx_base, dma_addr_t tx_handle,
		unsigned nframes, unsigned frame_size,
		struct device *peer_device, void (*notify)(struct ivc *));
unsigned tegra_ivc_total_queue_size(unsigned queue_size);
int tegra_ivc_write_user(struct ivc *ivc, const void __user *user_buf,
		size_t size);
int tegra_ivc_read_user(struct ivc *ivc, void __user *buf, size_t max_read);
size_t tegra_ivc_align(size_t size);
int tegra_ivc_channel_sync(struct ivc *ivc);

#endif /* __tegra_ivc_instance_h__ */