| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ZFTAPE_H |
| 2 | #define _ZFTAPE_H |
| 3 | |
| 4 | /* |
| 5 | * Copyright (C) 1996, 1997 Claus-Justus Heine. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | |
| 21 | * |
| 22 | * $Source: /homes/cvs/ftape-stacked/include/linux/zftape.h,v $ |
| 23 | * $Revision: 1.12 $ |
| 24 | * $Date: 1997/10/21 11:02:37 $ |
| 25 | * |
| 26 | * Special ioctl and other global info for the zftape VFS |
| 27 | * interface for the QIC-40/80/3010/3020 floppy-tape driver for |
| 28 | * Linux. |
| 29 | */ |
| 30 | |
| 31 | #define ZFTAPE_VERSION "zftape for " FTAPE_VERSION |
| 32 | |
| 33 | #include <linux/ftape.h> |
| 34 | |
| 35 | #define ZFTAPE_LABEL "Ftape - The Linux Floppy Tape Project!" |
| 36 | |
| 37 | /* Bits of the minor device number that control the operation mode */ |
| 38 | #define ZFT_Q80_MODE (1 << 3) |
| 39 | #define ZFT_ZIP_MODE (1 << 4) |
| 40 | #define ZFT_RAW_MODE (1 << 5) |
| 41 | #define ZFT_MINOR_OP_MASK (ZFT_Q80_MODE | \ |
| 42 | ZFT_ZIP_MODE | \ |
| 43 | ZFT_RAW_MODE) |
| 44 | #define ZFT_MINOR_MASK (FTAPE_SEL_MASK | \ |
| 45 | ZFT_MINOR_OP_MASK | \ |
| 46 | FTAPE_NO_REWIND) |
| 47 | |
| 48 | #ifdef ZFT_OBSOLETE |
| 49 | struct mtblksz { |
| 50 | unsigned int mt_blksz; |
| 51 | }; |
| 52 | #define MTIOC_ZFTAPE_GETBLKSZ _IOR('m', 104, struct mtblksz) |
| 53 | #endif |
| 54 | |
| 55 | #ifdef __KERNEL__ |
| 56 | |
| 57 | extern int zft_init(void); |
| 58 | |
| 59 | static inline __s64 zft_div_blksz(__s64 value, __u32 blk_sz) |
| 60 | { |
| 61 | if (blk_sz == 1) { |
| 62 | return value; |
| 63 | } else { |
| 64 | return (__s64)(((__u32)(value >> 10) + (blk_sz >> 10) - 1) |
| 65 | / (blk_sz >> 10)); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | static inline __s64 zft_mul_blksz(__s64 value, __u32 blk_sz) |
| 70 | { |
| 71 | if (blk_sz == 1) { |
| 72 | return value; |
| 73 | } else { |
| 74 | /* if blk_sz != 1, then it is a multiple of 1024. In |
| 75 | * this case, `value' will also fit into 32 bits. |
| 76 | * |
| 77 | * Actually, this limits the capacity to 42 |
| 78 | * bits. This is (2^32)*1024, roughly a thousand |
| 79 | * times 2GB, or 3 Terabytes. Hopefully this is enough |
| 80 | */ |
| 81 | return(__s64)(((__u32)(value)*(blk_sz>>10))<<10); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | #endif |
| 86 | |
| 87 | #endif |