cdev_ctrl.h

/*******************************************************************************
 *
 * Xilinx XDMA IP Core Linux Driver
 * Copyright(c) 2015 - 2020 Xilinx, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "LICENSE".
 *
 * Karen Xie <karen.xie@xilinx.com>
 *
 ******************************************************************************/

#ifndef _XDMA_IOCALLS_POSIX_H_
#define _XDMA_IOCALLS_POSIX_H_

#include <linux/ioctl.h>

/* Use 'x' as magic number */
#define XDMA_IOC_MAGIC	'x'
/* XL OpenCL X->58(ASCII), L->6C(ASCII), O->0 C->C L->6C(ASCII); */
#define XDMA_XCL_MAGIC 0X586C0C6C

/*
 * S means "Set" through a ptr,
 * T means "Tell" directly with the argument value
 * G means "Get": reply by setting through a pointer
 * Q means "Query": response is on the return value
 * X means "eXchange": switch G and S atomically
 * H means "sHift": switch T and Q atomically
 *
 * _IO(type,nr)		    no arguments
 * _IOR(type,nr,datatype)   read data from driver
 * _IOW(type,nr.datatype)   write data to driver
 * _IORW(type,nr,datatype)  read/write data
 *
 * _IOC_DIR(nr)		    returns direction
 * _IOC_TYPE(nr)	    returns magic
 * _IOC_NR(nr)		    returns number
 * _IOC_SIZE(nr)	    returns size
 */

enum XDMA_IOC_TYPES {
	XDMA_IOC_NOP,
	XDMA_IOC_INFO,
	XDMA_IOC_OFFLINE,
	XDMA_IOC_ONLINE,
	XDMA_IOC_MAX
};

struct xdma_ioc_base {
	unsigned int magic;
	unsigned int command;
};

struct xdma_ioc_info {
	struct xdma_ioc_base	base;
	unsigned short		vendor;
	unsigned short		device;
	unsigned short		subsystem_vendor;
	unsigned short		subsystem_device;
	unsigned int		dma_engine_version;
	unsigned int		driver_version;
	unsigned long long	feature_id;
	unsigned short		domain;
	unsigned char		bus;
	unsigned char		dev;
	unsigned char		func;
};

/* IOCTL codes */
#define XDMA_IOCINFO		_IOWR(XDMA_IOC_MAGIC, XDMA_IOC_INFO, \
					struct xdma_ioc_info)
#define XDMA_IOCOFFLINE		_IO(XDMA_IOC_MAGIC, XDMA_IOC_OFFLINE)
#define XDMA_IOCONLINE		_IO(XDMA_IOC_MAGIC, XDMA_IOC_ONLINE)

#define IOCTL_XDMA_ADDRMODE_SET	_IOW('q', 4, int)
#define IOCTL_XDMA_ADDRMODE_GET	_IOR('q', 5, int)
#define IOCTL_XDMA_ALIGN_GET	_IOR('q', 6, int)

#endif /* _XDMA_IOCALLS_POSIX_H_ */