1 /* 2 * 3 * Copyright (c) International Business Machines Corp., 2001 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 * 19 20 * In this header file keep all flags and other 21 * structures that will be needed in both kernel 22 * and user space. Specifically the ioctl flags 23 * will go in here so that in user space a program 24 * can specify flags for the ioctl call. 25 * 26 * author: Sean Ruyle 27 * date: 06/11/2003 28 * 29 */ 30 31 #define TMOD_DRIVER_NAME "ltp example module" 32 #define DEVICE_NAME "/dev/tmod" 33 #define TMOD_MAJOR 252 34 #define MAG_NUM 'k' 35 #ifndef SET_MODULE_OWNER 36 #define SET_MODULE_OWNER(dev) ((dev)->owner = THIS_MODULE) 37 #endif 38 39 /* put ioctl flags here, use the _IO macro which is 40 found in linux/ioctl.h, takes a letter, and an 41 integer */ 42 43 #define LTP_OPTION1 _IO(MAG_NUM, 1) 44 #define LTP_OTHER _IO(MAG_NUM, 2) 45 46 /* memory between the kernel and user space is 47 seperated, so that if a structure is needed 48 to be passed between kernel and user space 49 a call must be made to copy_to_user or copy 50 from user. Use this structure to streamline 51 that process. For example: A function that 52 writes to a disc takes in a ki_write_t 53 pointer from userspace. In the user space 54 program specify the length of the pointer as 55 in_len, and in_data as the actual structure. */ 56 57 struct tmod_interface { 58 int in_len; // input data length 59 caddr_t in_data; // input data 60 int out_rc; // return code from the test 61 int out_len; // output data length 62 caddr_t out_data; // output data 63 }; 64 typedef struct tmod_interface tmod_interface_t; 65 66 67 68 69 70
