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path: root/drivers/gpu/drm/nouveau/compote/compote.h
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/*
 * Copyright 2017 Red Hat Inc.
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Authors: Jérôme Glisse <jglisse@redhat.com>
 */
#ifndef COMPOTE_H
#define COMPOTE_H

#include <linux/list.h>
#include "nouveau_drv.h"

#define COMPOTE_DEVICE_NAME "compote"

struct compote_device {
	struct device				*device;
	struct nouveau_drm			*nvdrm;
	struct cdev				cdev;
	int					minor;
	uint8_t					chipset;
};

struct compote_file {
	struct compote_device			*cdevice;
	struct file				*file;
	struct nouveau_cli			nvclient;
	struct list_head			channels;
	struct rw_semaphore			rwsem;
};

struct compote_mo {
	struct kref				kref;
	struct compote_file			*cfile;
	struct list_head			vas;
	struct nouveau_bo			*nvbo;
	uint64_t				npages;
	uint64_t				foffset;
};

struct compote_mo_va {
	uint64_t				start;
	uint64_t				end;
	uint64_t				pgoffset;
	struct compote_mo			*mo;
	struct list_head			list;
	const struct vm_operations_struct	*ttm_vm_ops;
};

struct compote_channel {
	struct list_head			list;
	struct compote_file			*cfile;
	struct nouveau_channel			*nvchan;
	struct kref				kref;
};

long compote_ioctl_mem_alloc(struct compote_file *cfile, void __user *uarg);
long compote_ioctl_mem_free(struct compote_file *cfile, void __user *uarg);

int compote_ioctl_channel_alloc(struct compote_file *cfile, void __user *uarg);
int compote_ioctl_channel_free(struct compote_file *cfile, void __user *uarg);
void compote_channel_ref(struct compote_channel *channel);
void compote_channel_unref(struct compote_channel *channel);

void compote_mo_ref(struct compote_mo *mo);
void compote_mo_unref(struct compote_mo *mo);
int compote_mo_mmap(struct compote_file *cfile,
		    struct vm_area_struct *vma,
		    struct file *file);

#endif /* COMPOTE_H */