49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/*
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* Inter-VM Communication
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*
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* Copyright (C) 2014-2015, NVIDIA CORPORATION. All rights reserved.
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*
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*/
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#ifndef __tegra_ivc_instance_h__
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#define __tegra_ivc_instance_h__
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#include <linux/dma-mapping.h>
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#include <linux/device.h>
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#define IVC_ALIGN 64
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struct ivc_channel_header;
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struct ivc {
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struct ivc_channel_header *rx_channel, *tx_channel;
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uint32_t w_pos, r_pos;
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void (*notify)(struct ivc *);
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uint32_t nframes, frame_size;
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struct device *peer_device;
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dma_addr_t rx_handle, tx_handle;
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};
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int tegra_ivc_init(struct ivc *ivc, uintptr_t rx_base, uintptr_t tx_base,
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unsigned nframes, unsigned frame_size,
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struct device *peer_device, void (*notify)(struct ivc *));
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int tegra_ivc_init_with_dma_handle(struct ivc *ivc, uintptr_t rx_base,
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dma_addr_t rx_handle, uintptr_t tx_base, dma_addr_t tx_handle,
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unsigned nframes, unsigned frame_size,
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struct device *peer_device, void (*notify)(struct ivc *));
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unsigned tegra_ivc_total_queue_size(unsigned queue_size);
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int tegra_ivc_write_user(struct ivc *ivc, const void __user *user_buf,
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size_t size);
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int tegra_ivc_read_user(struct ivc *ivc, void __user *buf, size_t max_read);
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size_t tegra_ivc_align(size_t size);
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int tegra_ivc_channel_sync(struct ivc *ivc);
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#endif /* __tegra_ivc_instance_h__ */
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