Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: capi.c,v 1.1.2.7 2004/04/28 09:48:59 armin Exp $ |
| 2 | * |
| 3 | * CAPI 2.0 Interface for Linux |
| 4 | * |
| 5 | * Copyright 1996 by Carsten Paeth <calle@calle.de> |
| 6 | * |
| 7 | * This software may be used and distributed according to the terms |
| 8 | * of the GNU General Public License, incorporated herein by reference. |
| 9 | * |
| 10 | */ |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/module.h> |
| 13 | #include <linux/errno.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/major.h> |
| 16 | #include <linux/sched.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/fcntl.h> |
| 19 | #include <linux/fs.h> |
| 20 | #include <linux/signal.h> |
Matthias Kaehlcke | 9ea6e5d | 2007-05-08 00:32:43 -0700 | [diff] [blame] | 21 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/mm.h> |
Jonathan Corbet | a237f3b | 2008-05-16 14:15:33 -0600 | [diff] [blame] | 23 | #include <linux/smp_lock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/timer.h> |
| 25 | #include <linux/wait.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/tty.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/netdevice.h> |
| 28 | #include <linux/ppp_defs.h> |
| 29 | #include <linux/if_ppp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/skbuff.h> |
| 31 | #include <linux/proc_fs.h> |
Alexey Dobriyan | 9a58a80 | 2010-01-14 03:10:54 -0800 | [diff] [blame] | 32 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/poll.h> |
| 34 | #include <linux/capi.h> |
| 35 | #include <linux/kernelcapi.h> |
| 36 | #include <linux/init.h> |
| 37 | #include <linux/device.h> |
| 38 | #include <linux/moduleparam.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/isdn/capiutil.h> |
| 40 | #include <linux/isdn/capicmd.h> |
Jan Kiszka | 90926f0 | 2010-02-08 10:12:06 +0000 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include "capifs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface"); |
| 45 | MODULE_AUTHOR("Carsten Paeth"); |
| 46 | MODULE_LICENSE("GPL"); |
| 47 | |
| 48 | #undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */ |
| 49 | #undef _DEBUG_TTYFUNCS /* call to tty_driver */ |
| 50 | #undef _DEBUG_DATAFLOW /* data flow */ |
| 51 | |
| 52 | /* -------- driver information -------------------------------------- */ |
| 53 | |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 54 | static struct class *capi_class; |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 55 | static int capi_major = 68; /* allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | module_param_named(major, capi_major, uint, 0); |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 60 | #define CAPINC_NR_PORTS 32 |
| 61 | #define CAPINC_MAX_PORTS 256 |
| 62 | |
| 63 | static int capi_ttymajor = 191; |
| 64 | static int capi_ttyminors = CAPINC_NR_PORTS; |
| 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | module_param_named(ttymajor, capi_ttymajor, uint, 0); |
| 67 | module_param_named(ttyminors, capi_ttyminors, uint, 0); |
| 68 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 69 | |
| 70 | /* -------- defines ------------------------------------------------- */ |
| 71 | |
| 72 | #define CAPINC_MAX_RECVQUEUE 10 |
| 73 | #define CAPINC_MAX_SENDQUEUE 10 |
| 74 | #define CAPI_MAX_BLKSIZE 2048 |
| 75 | |
| 76 | /* -------- data structures ----------------------------------------- */ |
| 77 | |
| 78 | struct capidev; |
| 79 | struct capincci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | struct capiminor; |
| 81 | |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 82 | struct datahandle_queue { |
| 83 | struct list_head list; |
| 84 | u16 datahandle; |
| 85 | }; |
| 86 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | struct capiminor { |
| 88 | struct list_head list; |
| 89 | struct capincci *nccip; |
| 90 | unsigned int minor; |
Jan Kiszka | 90926f0 | 2010-02-08 10:12:06 +0000 | [diff] [blame] | 91 | struct dentry *capifs_dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
| 93 | struct capi20_appl *ap; |
| 94 | u32 ncci; |
| 95 | u16 datahandle; |
| 96 | u16 msgid; |
| 97 | |
| 98 | struct tty_struct *tty; |
| 99 | int ttyinstop; |
| 100 | int ttyoutstop; |
| 101 | struct sk_buff *ttyskb; |
| 102 | atomic_t ttyopencount; |
| 103 | |
| 104 | struct sk_buff_head inqueue; |
| 105 | int inbytes; |
| 106 | struct sk_buff_head outqueue; |
| 107 | int outbytes; |
| 108 | |
| 109 | /* transmit path */ |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 110 | struct list_head ackqueue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | int nack; |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 112 | spinlock_t ackqlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 115 | /* FIXME: The following lock is a sledgehammer-workaround to a |
| 116 | * locking issue with the capiminor (and maybe other) data structure(s). |
| 117 | * Access to this data is done in a racy way and crashes the machine with |
| 118 | * a FritzCard DSL driver; sooner or later. This is a workaround |
| 119 | * which trades scalability vs stability, so it doesn't crash the kernel anymore. |
| 120 | * The correct (and scalable) fix for the issue seems to require |
| 121 | * an API change to the drivers... . */ |
| 122 | static DEFINE_SPINLOCK(workaround_lock); |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | struct capincci { |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 125 | struct list_head list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | u32 ncci; |
| 127 | struct capidev *cdev; |
| 128 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 129 | struct capiminor *minorp; |
| 130 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 131 | }; |
| 132 | |
| 133 | struct capidev { |
| 134 | struct list_head list; |
| 135 | struct capi20_appl ap; |
| 136 | u16 errcode; |
| 137 | unsigned userflags; |
| 138 | |
| 139 | struct sk_buff_head recvqueue; |
| 140 | wait_queue_head_t recvwait; |
| 141 | |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 142 | struct list_head nccis; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 144 | struct mutex lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | }; |
| 146 | |
| 147 | /* -------- global variables ---------------------------------------- */ |
| 148 | |
Jan Kiszka | b8f433d | 2010-02-08 10:12:17 +0000 | [diff] [blame] | 149 | static DEFINE_MUTEX(capidev_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | static LIST_HEAD(capidev_list); |
| 151 | |
| 152 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | static DEFINE_RWLOCK(capiminor_list_lock); |
| 155 | static LIST_HEAD(capiminor_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | /* -------- datahandles --------------------------------------------- */ |
| 158 | |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 159 | static int capiminor_add_ack(struct capiminor *mp, u16 datahandle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | { |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 161 | struct datahandle_queue *n; |
| 162 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
| 164 | n = kmalloc(sizeof(*n), GFP_ATOMIC); |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 165 | if (unlikely(!n)) { |
| 166 | printk(KERN_ERR "capi: alloc datahandle failed\n"); |
| 167 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | n->datahandle = datahandle; |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 170 | INIT_LIST_HEAD(&n->list); |
| 171 | spin_lock_irqsave(&mp->ackqlock, flags); |
| 172 | list_add_tail(&n->list, &mp->ackqueue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | mp->nack++; |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 174 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) |
| 179 | { |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 180 | struct datahandle_queue *p, *tmp; |
| 181 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 183 | spin_lock_irqsave(&mp->ackqlock, flags); |
| 184 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
| 185 | if (p->datahandle == datahandle) { |
| 186 | list_del(&p->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | kfree(p); |
| 188 | mp->nack--; |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 189 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | return 0; |
| 191 | } |
| 192 | } |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 193 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | return -1; |
| 195 | } |
| 196 | |
| 197 | static void capiminor_del_all_ack(struct capiminor *mp) |
| 198 | { |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 199 | struct datahandle_queue *p, *tmp; |
| 200 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 202 | spin_lock_irqsave(&mp->ackqlock, flags); |
| 203 | list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { |
| 204 | list_del(&p->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | kfree(p); |
| 206 | mp->nack--; |
| 207 | } |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 208 | spin_unlock_irqrestore(&mp->ackqlock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | |
| 212 | /* -------- struct capiminor ---------------------------------------- */ |
| 213 | |
| 214 | static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) |
| 215 | { |
| 216 | struct capiminor *mp, *p; |
| 217 | unsigned int minor = 0; |
| 218 | unsigned long flags; |
| 219 | |
Jan Kiszka | 54f0fad | 2010-02-08 10:12:20 +0000 | [diff] [blame] | 220 | mp = kzalloc(sizeof(*mp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | if (!mp) { |
| 222 | printk(KERN_ERR "capi: can't alloc capiminor\n"); |
| 223 | return NULL; |
| 224 | } |
| 225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | mp->ap = ap; |
| 227 | mp->ncci = ncci; |
| 228 | mp->msgid = 0; |
| 229 | atomic_set(&mp->ttyopencount,0); |
Michael Buesch | 6aa6547 | 2006-06-26 00:25:30 -0700 | [diff] [blame] | 230 | INIT_LIST_HEAD(&mp->ackqueue); |
| 231 | spin_lock_init(&mp->ackqlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | |
| 233 | skb_queue_head_init(&mp->inqueue); |
| 234 | skb_queue_head_init(&mp->outqueue); |
| 235 | |
| 236 | /* Allocate the least unused minor number. |
| 237 | */ |
| 238 | write_lock_irqsave(&capiminor_list_lock, flags); |
| 239 | if (list_empty(&capiminor_list)) |
| 240 | list_add(&mp->list, &capiminor_list); |
| 241 | else { |
| 242 | list_for_each_entry(p, &capiminor_list, list) { |
| 243 | if (p->minor > minor) |
| 244 | break; |
| 245 | minor++; |
| 246 | } |
| 247 | |
| 248 | if (minor < capi_ttyminors) { |
| 249 | mp->minor = minor; |
| 250 | list_add(&mp->list, p->list.prev); |
| 251 | } |
| 252 | } |
| 253 | write_unlock_irqrestore(&capiminor_list_lock, flags); |
| 254 | |
| 255 | if (!(minor < capi_ttyminors)) { |
| 256 | printk(KERN_NOTICE "capi: out of minors\n"); |
| 257 | kfree(mp); |
| 258 | return NULL; |
| 259 | } |
| 260 | |
| 261 | return mp; |
| 262 | } |
| 263 | |
| 264 | static void capiminor_free(struct capiminor *mp) |
| 265 | { |
| 266 | unsigned long flags; |
| 267 | |
| 268 | write_lock_irqsave(&capiminor_list_lock, flags); |
| 269 | list_del(&mp->list); |
| 270 | write_unlock_irqrestore(&capiminor_list_lock, flags); |
| 271 | |
Wei Yongjun | d46604e | 2009-02-25 00:12:09 +0000 | [diff] [blame] | 272 | kfree_skb(mp->ttyskb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | mp->ttyskb = NULL; |
| 274 | skb_queue_purge(&mp->inqueue); |
| 275 | skb_queue_purge(&mp->outqueue); |
| 276 | capiminor_del_all_ack(mp); |
| 277 | kfree(mp); |
| 278 | } |
| 279 | |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 280 | static struct capiminor *capiminor_find(unsigned int minor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
| 282 | struct list_head *l; |
| 283 | struct capiminor *p = NULL; |
| 284 | |
| 285 | read_lock(&capiminor_list_lock); |
| 286 | list_for_each(l, &capiminor_list) { |
| 287 | p = list_entry(l, struct capiminor, list); |
| 288 | if (p->minor == minor) |
| 289 | break; |
| 290 | } |
| 291 | read_unlock(&capiminor_list_lock); |
| 292 | if (l == &capiminor_list) |
| 293 | return NULL; |
| 294 | |
| 295 | return p; |
| 296 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
| 298 | /* -------- struct capincci ----------------------------------------- */ |
| 299 | |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 300 | static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | { |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 302 | struct capiminor *mp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 304 | if (!(cdev->userflags & CAPIFLAG_HIGHJACKING)) |
| 305 | return; |
| 306 | |
| 307 | mp = np->minorp = capiminor_alloc(&cdev->ap, np->ncci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | if (mp) { |
| 309 | mp->nccip = np; |
| 310 | #ifdef _DEBUG_REFCOUNT |
| 311 | printk(KERN_DEBUG "set mp->nccip\n"); |
| 312 | #endif |
Jan Kiszka | 90926f0 | 2010-02-08 10:12:06 +0000 | [diff] [blame] | 313 | mp->capifs_dentry = |
| 314 | capifs_new_ncci(mp->minor, |
| 315 | MKDEV(capi_ttymajor, mp->minor)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | } |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | static void capincci_free_minor(struct capincci *np) |
| 320 | { |
| 321 | struct capiminor *mp = np->minorp; |
| 322 | |
| 323 | if (mp) { |
| 324 | capifs_free_ncci(mp->capifs_dentry); |
| 325 | if (mp->tty) { |
| 326 | mp->nccip = NULL; |
| 327 | #ifdef _DEBUG_REFCOUNT |
| 328 | printk(KERN_DEBUG "reset mp->nccip\n"); |
| 329 | #endif |
| 330 | tty_hangup(mp->tty); |
| 331 | } else { |
| 332 | capiminor_free(mp); |
| 333 | } |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | static inline unsigned int capincci_minor_opencount(struct capincci *np) |
| 338 | { |
| 339 | struct capiminor *mp = np->minorp; |
| 340 | |
| 341 | return mp ? atomic_read(&mp->ttyopencount) : 0; |
| 342 | } |
| 343 | |
| 344 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 345 | |
| 346 | static inline void |
| 347 | capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { } |
| 348 | static inline void capincci_free_minor(struct capincci *np) { } |
| 349 | |
| 350 | static inline unsigned int capincci_minor_opencount(struct capincci *np) |
| 351 | { |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 356 | |
| 357 | static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) |
| 358 | { |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 359 | struct capincci *np; |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 360 | |
Jan Kiszka | 54f0fad | 2010-02-08 10:12:20 +0000 | [diff] [blame] | 361 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 362 | if (!np) |
| 363 | return NULL; |
| 364 | np->ncci = ncci; |
| 365 | np->cdev = cdev; |
| 366 | |
| 367 | capincci_alloc_minor(cdev, np); |
| 368 | |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 369 | list_add_tail(&np->list, &cdev->nccis); |
| 370 | |
| 371 | return np; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | } |
| 373 | |
| 374 | static void capincci_free(struct capidev *cdev, u32 ncci) |
| 375 | { |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 376 | struct capincci *np, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 378 | list_for_each_entry_safe(np, tmp, &cdev->nccis, list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | if (ncci == 0xffffffff || np->ncci == ncci) { |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 380 | capincci_free_minor(np); |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 381 | list_del(&np->list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | kfree(np); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) |
| 387 | { |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 388 | struct capincci *np; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 390 | list_for_each_entry(np, &cdev->nccis, list) |
| 391 | if (np->ncci == ncci) |
| 392 | return np; |
| 393 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
| 395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 397 | /* -------- handle data queue --------------------------------------- */ |
| 398 | |
| 399 | static struct sk_buff * |
| 400 | gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) |
| 401 | { |
| 402 | struct sk_buff *nskb; |
| 403 | nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC); |
| 404 | if (nskb) { |
| 405 | u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2); |
| 406 | unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); |
| 407 | capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); |
| 408 | capimsg_setu16(s, 2, mp->ap->applid); |
| 409 | capimsg_setu8 (s, 4, CAPI_DATA_B3); |
| 410 | capimsg_setu8 (s, 5, CAPI_RESP); |
| 411 | capimsg_setu16(s, 6, mp->msgid++); |
| 412 | capimsg_setu32(s, 8, mp->ncci); |
| 413 | capimsg_setu16(s, 12, datahandle); |
| 414 | } |
| 415 | return nskb; |
| 416 | } |
| 417 | |
| 418 | static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) |
| 419 | { |
| 420 | struct sk_buff *nskb; |
| 421 | int datalen; |
| 422 | u16 errcode, datahandle; |
| 423 | struct tty_ldisc *ld; |
| 424 | |
| 425 | datalen = skb->len - CAPIMSG_LEN(skb->data); |
| 426 | if (mp->tty == NULL) |
| 427 | { |
| 428 | #ifdef _DEBUG_DATAFLOW |
| 429 | printk(KERN_DEBUG "capi: currently no receiver\n"); |
| 430 | #endif |
| 431 | return -1; |
| 432 | } |
| 433 | |
| 434 | ld = tty_ldisc_ref(mp->tty); |
| 435 | if (ld == NULL) |
| 436 | return -1; |
Alan Cox | a352def | 2008-07-16 21:53:12 +0100 | [diff] [blame] | 437 | if (ld->ops->receive_buf == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
| 439 | printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n"); |
| 440 | #endif |
| 441 | goto bad; |
| 442 | } |
| 443 | if (mp->ttyinstop) { |
| 444 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
| 445 | printk(KERN_DEBUG "capi: recv tty throttled\n"); |
| 446 | #endif |
| 447 | goto bad; |
| 448 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 449 | if (mp->tty->receive_room < datalen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
| 451 | printk(KERN_DEBUG "capi: no room in tty\n"); |
| 452 | #endif |
| 453 | goto bad; |
| 454 | } |
Harvey Harrison | 2f9e9b6 | 2008-04-28 02:14:37 -0700 | [diff] [blame] | 455 | if ((nskb = gen_data_b3_resp_for(mp, skb)) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); |
| 457 | goto bad; |
| 458 | } |
| 459 | datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4); |
| 460 | errcode = capi20_put_message(mp->ap, nskb); |
| 461 | if (errcode != CAPI_NOERROR) { |
| 462 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", |
| 463 | errcode); |
| 464 | kfree_skb(nskb); |
| 465 | goto bad; |
| 466 | } |
| 467 | (void)skb_pull(skb, CAPIMSG_LEN(skb->data)); |
| 468 | #ifdef _DEBUG_DATAFLOW |
| 469 | printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n", |
| 470 | datahandle, skb->len); |
| 471 | #endif |
Alan Cox | a352def | 2008-07-16 21:53:12 +0100 | [diff] [blame] | 472 | ld->ops->receive_buf(mp->tty, skb->data, NULL, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | kfree_skb(skb); |
| 474 | tty_ldisc_deref(ld); |
| 475 | return 0; |
| 476 | bad: |
| 477 | tty_ldisc_deref(ld); |
| 478 | return -1; |
| 479 | } |
| 480 | |
| 481 | static void handle_minor_recv(struct capiminor *mp) |
| 482 | { |
| 483 | struct sk_buff *skb; |
Harvey Harrison | 2f9e9b6 | 2008-04-28 02:14:37 -0700 | [diff] [blame] | 484 | while ((skb = skb_dequeue(&mp->inqueue)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | unsigned int len = skb->len; |
| 486 | mp->inbytes -= len; |
| 487 | if (handle_recv_skb(mp, skb) < 0) { |
| 488 | skb_queue_head(&mp->inqueue, skb); |
| 489 | mp->inbytes += len; |
| 490 | return; |
| 491 | } |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | static int handle_minor_send(struct capiminor *mp) |
| 496 | { |
| 497 | struct sk_buff *skb; |
| 498 | u16 len; |
| 499 | int count = 0; |
| 500 | u16 errcode; |
| 501 | u16 datahandle; |
| 502 | |
| 503 | if (mp->tty && mp->ttyoutstop) { |
| 504 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
| 505 | printk(KERN_DEBUG "capi: send: tty stopped\n"); |
| 506 | #endif |
| 507 | return 0; |
| 508 | } |
| 509 | |
Harvey Harrison | 2f9e9b6 | 2008-04-28 02:14:37 -0700 | [diff] [blame] | 510 | while ((skb = skb_dequeue(&mp->outqueue)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | datahandle = mp->datahandle; |
| 512 | len = (u16)skb->len; |
| 513 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); |
| 514 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); |
| 515 | capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); |
| 516 | capimsg_setu16(skb->data, 2, mp->ap->applid); |
| 517 | capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); |
| 518 | capimsg_setu8 (skb->data, 5, CAPI_REQ); |
| 519 | capimsg_setu16(skb->data, 6, mp->msgid++); |
| 520 | capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ |
Andrew Morton | 5e6c20a | 2007-07-17 04:04:22 -0700 | [diff] [blame] | 521 | capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | capimsg_setu16(skb->data, 16, len); /* Data length */ |
| 523 | capimsg_setu16(skb->data, 18, datahandle); |
| 524 | capimsg_setu16(skb->data, 20, 0); /* Flags */ |
| 525 | |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 526 | if (capiminor_add_ack(mp, datahandle) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
| 528 | skb_queue_head(&mp->outqueue, skb); |
| 529 | return count; |
| 530 | } |
| 531 | errcode = capi20_put_message(mp->ap, skb); |
| 532 | if (errcode == CAPI_NOERROR) { |
| 533 | mp->datahandle++; |
| 534 | count++; |
| 535 | mp->outbytes -= len; |
| 536 | #ifdef _DEBUG_DATAFLOW |
| 537 | printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n", |
| 538 | datahandle, len); |
| 539 | #endif |
| 540 | continue; |
| 541 | } |
| 542 | capiminor_del_ack(mp, datahandle); |
| 543 | |
| 544 | if (errcode == CAPI_SENDQUEUEFULL) { |
| 545 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
| 546 | skb_queue_head(&mp->outqueue, skb); |
| 547 | break; |
| 548 | } |
| 549 | |
| 550 | /* ups, drop packet */ |
| 551 | printk(KERN_ERR "capi: put_message = %x\n", errcode); |
| 552 | mp->outbytes -= len; |
| 553 | kfree_skb(skb); |
| 554 | } |
| 555 | return count; |
| 556 | } |
| 557 | |
| 558 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 559 | /* -------- function called by lower level -------------------------- */ |
| 560 | |
| 561 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) |
| 562 | { |
| 563 | struct capidev *cdev = ap->private; |
| 564 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 565 | struct capiminor *mp; |
| 566 | u16 datahandle; |
| 567 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 568 | struct capincci *np; |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 569 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 571 | mutex_lock(&cdev->lock); |
| 572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { |
| 574 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 575 | if ((info & 0xff00) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | } |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 578 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 580 | |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 581 | spin_lock_irqsave(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { |
| 583 | skb_queue_tail(&cdev->recvqueue, skb); |
| 584 | wake_up_interruptible(&cdev->recvwait); |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 585 | goto unlock_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | } |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 587 | |
| 588 | np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | if (!np) { |
| 590 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); |
| 591 | skb_queue_tail(&cdev->recvqueue, skb); |
| 592 | wake_up_interruptible(&cdev->recvwait); |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 593 | goto unlock_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | } |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 595 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 597 | skb_queue_tail(&cdev->recvqueue, skb); |
| 598 | wake_up_interruptible(&cdev->recvwait); |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 599 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 601 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | mp = np->minorp; |
| 603 | if (!mp) { |
| 604 | skb_queue_tail(&cdev->recvqueue, skb); |
| 605 | wake_up_interruptible(&cdev->recvwait); |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 606 | goto unlock_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2); |
| 610 | #ifdef _DEBUG_DATAFLOW |
| 611 | printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n", |
| 612 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); |
| 613 | #endif |
| 614 | skb_queue_tail(&mp->inqueue, skb); |
| 615 | mp->inbytes += skb->len; |
| 616 | handle_minor_recv(mp); |
| 617 | |
| 618 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { |
| 619 | |
| 620 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4); |
| 621 | #ifdef _DEBUG_DATAFLOW |
| 622 | printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n", |
| 623 | datahandle, |
| 624 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2)); |
| 625 | #endif |
| 626 | kfree_skb(skb); |
| 627 | (void)capiminor_del_ack(mp, datahandle); |
| 628 | if (mp->tty) |
| 629 | tty_wakeup(mp->tty); |
| 630 | (void)handle_minor_send(mp); |
| 631 | |
| 632 | } else { |
| 633 | /* ups, let capi application handle it :-) */ |
| 634 | skb_queue_tail(&cdev->recvqueue, skb); |
| 635 | wake_up_interruptible(&cdev->recvwait); |
| 636 | } |
| 637 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 638 | |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 639 | unlock_out: |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 640 | spin_unlock_irqrestore(&workaround_lock, flags); |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 641 | mutex_unlock(&cdev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | /* -------- file_operations for capidev ----------------------------- */ |
| 645 | |
| 646 | static ssize_t |
| 647 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
| 648 | { |
| 649 | struct capidev *cdev = (struct capidev *)file->private_data; |
| 650 | struct sk_buff *skb; |
| 651 | size_t copied; |
Jan Kiszka | 28a1dbb | 2010-02-08 10:12:21 +0000 | [diff] [blame] | 652 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
| 654 | if (!cdev->ap.applid) |
| 655 | return -ENODEV; |
| 656 | |
Jan Kiszka | 28a1dbb | 2010-02-08 10:12:21 +0000 | [diff] [blame] | 657 | skb = skb_dequeue(&cdev->recvqueue); |
| 658 | if (!skb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | if (file->f_flags & O_NONBLOCK) |
| 660 | return -EAGAIN; |
Jan Kiszka | 28a1dbb | 2010-02-08 10:12:21 +0000 | [diff] [blame] | 661 | err = wait_event_interruptible(cdev->recvwait, |
| 662 | (skb = skb_dequeue(&cdev->recvqueue))); |
| 663 | if (err) |
| 664 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | } |
| 666 | if (skb->len > count) { |
| 667 | skb_queue_head(&cdev->recvqueue, skb); |
| 668 | return -EMSGSIZE; |
| 669 | } |
| 670 | if (copy_to_user(buf, skb->data, skb->len)) { |
| 671 | skb_queue_head(&cdev->recvqueue, skb); |
| 672 | return -EFAULT; |
| 673 | } |
| 674 | copied = skb->len; |
| 675 | |
| 676 | kfree_skb(skb); |
| 677 | |
| 678 | return copied; |
| 679 | } |
| 680 | |
| 681 | static ssize_t |
| 682 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
| 683 | { |
| 684 | struct capidev *cdev = (struct capidev *)file->private_data; |
| 685 | struct sk_buff *skb; |
| 686 | u16 mlen; |
| 687 | |
| 688 | if (!cdev->ap.applid) |
| 689 | return -ENODEV; |
| 690 | |
| 691 | skb = alloc_skb(count, GFP_USER); |
| 692 | if (!skb) |
| 693 | return -ENOMEM; |
| 694 | |
| 695 | if (copy_from_user(skb_put(skb, count), buf, count)) { |
| 696 | kfree_skb(skb); |
| 697 | return -EFAULT; |
| 698 | } |
| 699 | mlen = CAPIMSG_LEN(skb->data); |
| 700 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { |
| 701 | if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { |
| 702 | kfree_skb(skb); |
| 703 | return -EINVAL; |
| 704 | } |
| 705 | } else { |
| 706 | if (mlen != count) { |
| 707 | kfree_skb(skb); |
| 708 | return -EINVAL; |
| 709 | } |
| 710 | } |
| 711 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); |
| 712 | |
| 713 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 714 | mutex_lock(&cdev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 716 | mutex_unlock(&cdev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | } |
| 718 | |
| 719 | cdev->errcode = capi20_put_message(&cdev->ap, skb); |
| 720 | |
| 721 | if (cdev->errcode) { |
| 722 | kfree_skb(skb); |
| 723 | return -EIO; |
| 724 | } |
| 725 | return count; |
| 726 | } |
| 727 | |
| 728 | static unsigned int |
| 729 | capi_poll(struct file *file, poll_table * wait) |
| 730 | { |
| 731 | struct capidev *cdev = (struct capidev *)file->private_data; |
| 732 | unsigned int mask = 0; |
| 733 | |
| 734 | if (!cdev->ap.applid) |
| 735 | return POLLERR; |
| 736 | |
| 737 | poll_wait(file, &(cdev->recvwait), wait); |
| 738 | mask = POLLOUT | POLLWRNORM; |
| 739 | if (!skb_queue_empty(&cdev->recvqueue)) |
| 740 | mask |= POLLIN | POLLRDNORM; |
| 741 | return mask; |
| 742 | } |
| 743 | |
| 744 | static int |
| 745 | capi_ioctl(struct inode *inode, struct file *file, |
| 746 | unsigned int cmd, unsigned long arg) |
| 747 | { |
| 748 | struct capidev *cdev = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | capi_ioctl_struct data; |
| 750 | int retval = -EINVAL; |
| 751 | void __user *argp = (void __user *)arg; |
| 752 | |
| 753 | switch (cmd) { |
| 754 | case CAPI_REGISTER: |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 755 | mutex_lock(&cdev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 757 | if (cdev->ap.applid) { |
| 758 | retval = -EEXIST; |
| 759 | goto register_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | } |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 761 | if (copy_from_user(&cdev->ap.rparam, argp, |
| 762 | sizeof(struct capi_register_params))) { |
| 763 | retval = -EFAULT; |
| 764 | goto register_out; |
| 765 | } |
| 766 | cdev->ap.private = cdev; |
| 767 | cdev->ap.recv_message = capi_recv_message; |
| 768 | cdev->errcode = capi20_register(&cdev->ap); |
| 769 | retval = (int)cdev->ap.applid; |
| 770 | if (cdev->errcode) { |
| 771 | cdev->ap.applid = 0; |
| 772 | retval = -EIO; |
| 773 | } |
| 774 | |
| 775 | register_out: |
| 776 | mutex_unlock(&cdev->lock); |
| 777 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
| 779 | case CAPI_GET_VERSION: |
| 780 | { |
| 781 | if (copy_from_user(&data.contr, argp, |
| 782 | sizeof(data.contr))) |
| 783 | return -EFAULT; |
| 784 | cdev->errcode = capi20_get_version(data.contr, &data.version); |
| 785 | if (cdev->errcode) |
| 786 | return -EIO; |
| 787 | if (copy_to_user(argp, &data.version, |
| 788 | sizeof(data.version))) |
| 789 | return -EFAULT; |
| 790 | } |
| 791 | return 0; |
| 792 | |
| 793 | case CAPI_GET_SERIAL: |
| 794 | { |
| 795 | if (copy_from_user(&data.contr, argp, |
| 796 | sizeof(data.contr))) |
| 797 | return -EFAULT; |
| 798 | cdev->errcode = capi20_get_serial (data.contr, data.serial); |
| 799 | if (cdev->errcode) |
| 800 | return -EIO; |
| 801 | if (copy_to_user(argp, data.serial, |
| 802 | sizeof(data.serial))) |
| 803 | return -EFAULT; |
| 804 | } |
| 805 | return 0; |
| 806 | case CAPI_GET_PROFILE: |
| 807 | { |
| 808 | if (copy_from_user(&data.contr, argp, |
| 809 | sizeof(data.contr))) |
| 810 | return -EFAULT; |
| 811 | |
| 812 | if (data.contr == 0) { |
| 813 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); |
| 814 | if (cdev->errcode) |
| 815 | return -EIO; |
| 816 | |
| 817 | retval = copy_to_user(argp, |
| 818 | &data.profile.ncontroller, |
| 819 | sizeof(data.profile.ncontroller)); |
| 820 | |
| 821 | } else { |
| 822 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); |
| 823 | if (cdev->errcode) |
| 824 | return -EIO; |
| 825 | |
| 826 | retval = copy_to_user(argp, &data.profile, |
| 827 | sizeof(data.profile)); |
| 828 | } |
| 829 | if (retval) |
| 830 | return -EFAULT; |
| 831 | } |
| 832 | return 0; |
| 833 | |
| 834 | case CAPI_GET_MANUFACTURER: |
| 835 | { |
| 836 | if (copy_from_user(&data.contr, argp, |
| 837 | sizeof(data.contr))) |
| 838 | return -EFAULT; |
| 839 | cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); |
| 840 | if (cdev->errcode) |
| 841 | return -EIO; |
| 842 | |
| 843 | if (copy_to_user(argp, data.manufacturer, |
| 844 | sizeof(data.manufacturer))) |
| 845 | return -EFAULT; |
| 846 | |
| 847 | } |
| 848 | return 0; |
| 849 | case CAPI_GET_ERRCODE: |
| 850 | data.errcode = cdev->errcode; |
| 851 | cdev->errcode = CAPI_NOERROR; |
| 852 | if (arg) { |
| 853 | if (copy_to_user(argp, &data.errcode, |
| 854 | sizeof(data.errcode))) |
| 855 | return -EFAULT; |
| 856 | } |
| 857 | return data.errcode; |
| 858 | |
| 859 | case CAPI_INSTALLED: |
| 860 | if (capi20_isinstalled() == CAPI_NOERROR) |
| 861 | return 0; |
| 862 | return -ENXIO; |
| 863 | |
| 864 | case CAPI_MANUFACTURER_CMD: |
| 865 | { |
| 866 | struct capi_manufacturer_cmd mcmd; |
| 867 | if (!capable(CAP_SYS_ADMIN)) |
| 868 | return -EPERM; |
| 869 | if (copy_from_user(&mcmd, argp, sizeof(mcmd))) |
| 870 | return -EFAULT; |
| 871 | return capi20_manufacturer(mcmd.cmd, mcmd.data); |
| 872 | } |
| 873 | return 0; |
| 874 | |
| 875 | case CAPI_SET_FLAGS: |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 876 | case CAPI_CLR_FLAGS: { |
| 877 | unsigned userflags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 879 | if (copy_from_user(&userflags, argp, sizeof(userflags))) |
| 880 | return -EFAULT; |
| 881 | |
| 882 | mutex_lock(&cdev->lock); |
| 883 | if (cmd == CAPI_SET_FLAGS) |
| 884 | cdev->userflags |= userflags; |
| 885 | else |
| 886 | cdev->userflags &= ~userflags; |
| 887 | mutex_unlock(&cdev->lock); |
| 888 | return 0; |
| 889 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | case CAPI_GET_FLAGS: |
| 891 | if (copy_to_user(argp, &cdev->userflags, |
| 892 | sizeof(cdev->userflags))) |
| 893 | return -EFAULT; |
| 894 | return 0; |
| 895 | |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 896 | case CAPI_NCCI_OPENCOUNT: { |
| 897 | struct capincci *nccip; |
| 898 | unsigned ncci; |
| 899 | int count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 901 | if (copy_from_user(&ncci, argp, sizeof(ncci))) |
| 902 | return -EFAULT; |
| 903 | |
| 904 | mutex_lock(&cdev->lock); |
| 905 | nccip = capincci_find(cdev, (u32)ncci); |
| 906 | if (nccip) |
| 907 | count = capincci_minor_opencount(nccip); |
| 908 | mutex_unlock(&cdev->lock); |
| 909 | return count; |
| 910 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | |
| 912 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 913 | case CAPI_NCCI_GETUNIT: { |
| 914 | struct capincci *nccip; |
| 915 | struct capiminor *mp; |
| 916 | unsigned ncci; |
| 917 | int unit = -ESRCH; |
| 918 | |
| 919 | if (copy_from_user(&ncci, argp, sizeof(ncci))) |
| 920 | return -EFAULT; |
| 921 | |
| 922 | mutex_lock(&cdev->lock); |
| 923 | nccip = capincci_find(cdev, (u32)ncci); |
| 924 | if (nccip) { |
| 925 | mp = nccip->minorp; |
| 926 | if (mp) |
| 927 | unit = mp->minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | } |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 929 | mutex_unlock(&cdev->lock); |
| 930 | return unit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | } |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 932 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 933 | |
| 934 | default: |
| 935 | return -EINVAL; |
| 936 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | } |
| 938 | |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 939 | static int capi_open(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | { |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 941 | struct capidev *cdev; |
| 942 | |
| 943 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); |
| 944 | if (!cdev) |
| 945 | return -ENOMEM; |
| 946 | |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 947 | mutex_init(&cdev->lock); |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 948 | skb_queue_head_init(&cdev->recvqueue); |
| 949 | init_waitqueue_head(&cdev->recvwait); |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 950 | INIT_LIST_HEAD(&cdev->nccis); |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 951 | file->private_data = cdev; |
| 952 | |
| 953 | mutex_lock(&capidev_list_lock); |
| 954 | list_add_tail(&cdev->list, &capidev_list); |
| 955 | mutex_unlock(&capidev_list_lock); |
| 956 | |
| 957 | return nonseekable_open(inode, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
| 959 | |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 960 | static int capi_release(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | { |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 962 | struct capidev *cdev = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 964 | mutex_lock(&capidev_list_lock); |
| 965 | list_del(&cdev->list); |
| 966 | mutex_unlock(&capidev_list_lock); |
| 967 | |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 968 | if (cdev->ap.applid) |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 969 | capi20_release(&cdev->ap); |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 970 | skb_queue_purge(&cdev->recvqueue); |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 971 | capincci_free(cdev, 0xffffffff); |
Jan Kiszka | eca39dd | 2010-02-08 10:12:18 +0000 | [diff] [blame] | 972 | |
| 973 | kfree(cdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | return 0; |
| 975 | } |
| 976 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 977 | static const struct file_operations capi_fops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | { |
| 979 | .owner = THIS_MODULE, |
| 980 | .llseek = no_llseek, |
| 981 | .read = capi_read, |
| 982 | .write = capi_write, |
| 983 | .poll = capi_poll, |
| 984 | .ioctl = capi_ioctl, |
| 985 | .open = capi_open, |
| 986 | .release = capi_release, |
| 987 | }; |
| 988 | |
| 989 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 990 | /* -------- tty_operations for capincci ----------------------------- */ |
| 991 | |
| 992 | static int capinc_tty_open(struct tty_struct * tty, struct file * file) |
| 993 | { |
| 994 | struct capiminor *mp; |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 995 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | |
Harvey Harrison | 2f9e9b6 | 2008-04-28 02:14:37 -0700 | [diff] [blame] | 997 | if ((mp = capiminor_find(iminor(file->f_path.dentry->d_inode))) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | return -ENXIO; |
Harvey Harrison | 2f9e9b6 | 2008-04-28 02:14:37 -0700 | [diff] [blame] | 999 | if (mp->nccip == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | return -ENXIO; |
| 1001 | |
| 1002 | tty->driver_data = (void *)mp; |
| 1003 | |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1004 | spin_lock_irqsave(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | if (atomic_read(&mp->ttyopencount) == 0) |
| 1006 | mp->tty = tty; |
| 1007 | atomic_inc(&mp->ttyopencount); |
| 1008 | #ifdef _DEBUG_REFCOUNT |
| 1009 | printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount)); |
| 1010 | #endif |
| 1011 | handle_minor_recv(mp); |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1012 | spin_unlock_irqrestore(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | return 0; |
| 1014 | } |
| 1015 | |
| 1016 | static void capinc_tty_close(struct tty_struct * tty, struct file * file) |
| 1017 | { |
| 1018 | struct capiminor *mp; |
| 1019 | |
| 1020 | mp = (struct capiminor *)tty->driver_data; |
| 1021 | if (mp) { |
| 1022 | if (atomic_dec_and_test(&mp->ttyopencount)) { |
| 1023 | #ifdef _DEBUG_REFCOUNT |
| 1024 | printk(KERN_DEBUG "capinc_tty_close lastclose\n"); |
| 1025 | #endif |
| 1026 | tty->driver_data = NULL; |
| 1027 | mp->tty = NULL; |
| 1028 | } |
| 1029 | #ifdef _DEBUG_REFCOUNT |
| 1030 | printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount)); |
| 1031 | #endif |
Harvey Harrison | 2f9e9b6 | 2008-04-28 02:14:37 -0700 | [diff] [blame] | 1032 | if (mp->nccip == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | capiminor_free(mp); |
| 1034 | } |
| 1035 | |
| 1036 | #ifdef _DEBUG_REFCOUNT |
| 1037 | printk(KERN_DEBUG "capinc_tty_close\n"); |
| 1038 | #endif |
| 1039 | } |
| 1040 | |
| 1041 | static int capinc_tty_write(struct tty_struct * tty, |
| 1042 | const unsigned char *buf, int count) |
| 1043 | { |
| 1044 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1045 | struct sk_buff *skb; |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1046 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | |
| 1048 | #ifdef _DEBUG_TTYFUNCS |
| 1049 | printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count); |
| 1050 | #endif |
| 1051 | |
| 1052 | if (!mp || !mp->nccip) { |
| 1053 | #ifdef _DEBUG_TTYFUNCS |
| 1054 | printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n"); |
| 1055 | #endif |
| 1056 | return 0; |
| 1057 | } |
| 1058 | |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1059 | spin_lock_irqsave(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | skb = mp->ttyskb; |
| 1061 | if (skb) { |
| 1062 | mp->ttyskb = NULL; |
| 1063 | skb_queue_tail(&mp->outqueue, skb); |
| 1064 | mp->outbytes += skb->len; |
| 1065 | } |
| 1066 | |
| 1067 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC); |
| 1068 | if (!skb) { |
| 1069 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1070 | spin_unlock_irqrestore(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | return -ENOMEM; |
| 1072 | } |
| 1073 | |
| 1074 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); |
| 1075 | memcpy(skb_put(skb, count), buf, count); |
| 1076 | |
| 1077 | skb_queue_tail(&mp->outqueue, skb); |
| 1078 | mp->outbytes += skb->len; |
| 1079 | (void)handle_minor_send(mp); |
| 1080 | (void)handle_minor_recv(mp); |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1081 | spin_unlock_irqrestore(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | return count; |
| 1083 | } |
| 1084 | |
Alan Cox | f2545a7 | 2008-04-30 00:54:09 -0700 | [diff] [blame] | 1085 | static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | { |
| 1087 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1088 | struct sk_buff *skb; |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1089 | unsigned long flags; |
Alan Cox | f2545a7 | 2008-04-30 00:54:09 -0700 | [diff] [blame] | 1090 | int ret = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | |
| 1092 | #ifdef _DEBUG_TTYFUNCS |
| 1093 | printk(KERN_DEBUG "capinc_put_char(%u)\n", ch); |
| 1094 | #endif |
| 1095 | |
| 1096 | if (!mp || !mp->nccip) { |
| 1097 | #ifdef _DEBUG_TTYFUNCS |
| 1098 | printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n"); |
| 1099 | #endif |
Alan Cox | f2545a7 | 2008-04-30 00:54:09 -0700 | [diff] [blame] | 1100 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | } |
| 1102 | |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1103 | spin_lock_irqsave(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | skb = mp->ttyskb; |
| 1105 | if (skb) { |
| 1106 | if (skb_tailroom(skb) > 0) { |
| 1107 | *(skb_put(skb, 1)) = ch; |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1108 | spin_unlock_irqrestore(&workaround_lock, flags); |
Alan Cox | f2545a7 | 2008-04-30 00:54:09 -0700 | [diff] [blame] | 1109 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | } |
| 1111 | mp->ttyskb = NULL; |
| 1112 | skb_queue_tail(&mp->outqueue, skb); |
| 1113 | mp->outbytes += skb->len; |
| 1114 | (void)handle_minor_send(mp); |
| 1115 | } |
| 1116 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC); |
| 1117 | if (skb) { |
| 1118 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); |
| 1119 | *(skb_put(skb, 1)) = ch; |
| 1120 | mp->ttyskb = skb; |
| 1121 | } else { |
| 1122 | printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); |
Alan Cox | f2545a7 | 2008-04-30 00:54:09 -0700 | [diff] [blame] | 1123 | ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | } |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1125 | spin_unlock_irqrestore(&workaround_lock, flags); |
Alan Cox | f2545a7 | 2008-04-30 00:54:09 -0700 | [diff] [blame] | 1126 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | static void capinc_tty_flush_chars(struct tty_struct *tty) |
| 1130 | { |
| 1131 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1132 | struct sk_buff *skb; |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1133 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | |
| 1135 | #ifdef _DEBUG_TTYFUNCS |
| 1136 | printk(KERN_DEBUG "capinc_tty_flush_chars\n"); |
| 1137 | #endif |
| 1138 | |
| 1139 | if (!mp || !mp->nccip) { |
| 1140 | #ifdef _DEBUG_TTYFUNCS |
| 1141 | printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n"); |
| 1142 | #endif |
| 1143 | return; |
| 1144 | } |
| 1145 | |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1146 | spin_lock_irqsave(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | skb = mp->ttyskb; |
| 1148 | if (skb) { |
| 1149 | mp->ttyskb = NULL; |
| 1150 | skb_queue_tail(&mp->outqueue, skb); |
| 1151 | mp->outbytes += skb->len; |
| 1152 | (void)handle_minor_send(mp); |
| 1153 | } |
| 1154 | (void)handle_minor_recv(mp); |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1155 | spin_unlock_irqrestore(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | } |
| 1157 | |
| 1158 | static int capinc_tty_write_room(struct tty_struct *tty) |
| 1159 | { |
| 1160 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1161 | int room; |
| 1162 | if (!mp || !mp->nccip) { |
| 1163 | #ifdef _DEBUG_TTYFUNCS |
| 1164 | printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n"); |
| 1165 | #endif |
| 1166 | return 0; |
| 1167 | } |
| 1168 | room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); |
| 1169 | room *= CAPI_MAX_BLKSIZE; |
| 1170 | #ifdef _DEBUG_TTYFUNCS |
| 1171 | printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room); |
| 1172 | #endif |
| 1173 | return room; |
| 1174 | } |
| 1175 | |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 1176 | static int capinc_tty_chars_in_buffer(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | { |
| 1178 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1179 | if (!mp || !mp->nccip) { |
| 1180 | #ifdef _DEBUG_TTYFUNCS |
| 1181 | printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n"); |
| 1182 | #endif |
| 1183 | return 0; |
| 1184 | } |
| 1185 | #ifdef _DEBUG_TTYFUNCS |
| 1186 | printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n", |
| 1187 | mp->outbytes, mp->nack, |
| 1188 | skb_queue_len(&mp->outqueue), |
| 1189 | skb_queue_len(&mp->inqueue)); |
| 1190 | #endif |
| 1191 | return mp->outbytes; |
| 1192 | } |
| 1193 | |
| 1194 | static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file, |
| 1195 | unsigned int cmd, unsigned long arg) |
| 1196 | { |
| 1197 | int error = 0; |
| 1198 | switch (cmd) { |
| 1199 | default: |
Stephen Rothwell | 53e8631 | 2008-10-13 10:44:33 +0100 | [diff] [blame] | 1200 | error = n_tty_ioctl_helper(tty, file, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | break; |
| 1202 | } |
| 1203 | return error; |
| 1204 | } |
| 1205 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1206 | static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | { |
| 1208 | #ifdef _DEBUG_TTYFUNCS |
| 1209 | printk(KERN_DEBUG "capinc_tty_set_termios\n"); |
| 1210 | #endif |
| 1211 | } |
| 1212 | |
| 1213 | static void capinc_tty_throttle(struct tty_struct * tty) |
| 1214 | { |
| 1215 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1216 | #ifdef _DEBUG_TTYFUNCS |
| 1217 | printk(KERN_DEBUG "capinc_tty_throttle\n"); |
| 1218 | #endif |
| 1219 | if (mp) |
| 1220 | mp->ttyinstop = 1; |
| 1221 | } |
| 1222 | |
| 1223 | static void capinc_tty_unthrottle(struct tty_struct * tty) |
| 1224 | { |
| 1225 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1226 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | #ifdef _DEBUG_TTYFUNCS |
| 1228 | printk(KERN_DEBUG "capinc_tty_unthrottle\n"); |
| 1229 | #endif |
| 1230 | if (mp) { |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1231 | spin_lock_irqsave(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | mp->ttyinstop = 0; |
| 1233 | handle_minor_recv(mp); |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1234 | spin_unlock_irqrestore(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | } |
| 1236 | } |
| 1237 | |
| 1238 | static void capinc_tty_stop(struct tty_struct *tty) |
| 1239 | { |
| 1240 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1241 | #ifdef _DEBUG_TTYFUNCS |
| 1242 | printk(KERN_DEBUG "capinc_tty_stop\n"); |
| 1243 | #endif |
| 1244 | if (mp) { |
| 1245 | mp->ttyoutstop = 1; |
| 1246 | } |
| 1247 | } |
| 1248 | |
| 1249 | static void capinc_tty_start(struct tty_struct *tty) |
| 1250 | { |
| 1251 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1252 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | #ifdef _DEBUG_TTYFUNCS |
| 1254 | printk(KERN_DEBUG "capinc_tty_start\n"); |
| 1255 | #endif |
| 1256 | if (mp) { |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1257 | spin_lock_irqsave(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | mp->ttyoutstop = 0; |
| 1259 | (void)handle_minor_send(mp); |
Michael Buesch | 053b47f | 2007-02-12 00:53:26 -0800 | [diff] [blame] | 1260 | spin_unlock_irqrestore(&workaround_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | } |
| 1262 | } |
| 1263 | |
| 1264 | static void capinc_tty_hangup(struct tty_struct *tty) |
| 1265 | { |
| 1266 | #ifdef _DEBUG_TTYFUNCS |
| 1267 | printk(KERN_DEBUG "capinc_tty_hangup\n"); |
| 1268 | #endif |
| 1269 | } |
| 1270 | |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 1271 | static int capinc_tty_break_ctl(struct tty_struct *tty, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | { |
| 1273 | #ifdef _DEBUG_TTYFUNCS |
| 1274 | printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state); |
| 1275 | #endif |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 1276 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | } |
| 1278 | |
| 1279 | static void capinc_tty_flush_buffer(struct tty_struct *tty) |
| 1280 | { |
| 1281 | #ifdef _DEBUG_TTYFUNCS |
| 1282 | printk(KERN_DEBUG "capinc_tty_flush_buffer\n"); |
| 1283 | #endif |
| 1284 | } |
| 1285 | |
| 1286 | static void capinc_tty_set_ldisc(struct tty_struct *tty) |
| 1287 | { |
| 1288 | #ifdef _DEBUG_TTYFUNCS |
| 1289 | printk(KERN_DEBUG "capinc_tty_set_ldisc\n"); |
| 1290 | #endif |
| 1291 | } |
| 1292 | |
| 1293 | static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) |
| 1294 | { |
| 1295 | #ifdef _DEBUG_TTYFUNCS |
| 1296 | printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch); |
| 1297 | #endif |
| 1298 | } |
| 1299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | static struct tty_driver *capinc_tty_driver; |
| 1301 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 1302 | static const struct tty_operations capinc_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | .open = capinc_tty_open, |
| 1304 | .close = capinc_tty_close, |
| 1305 | .write = capinc_tty_write, |
| 1306 | .put_char = capinc_tty_put_char, |
| 1307 | .flush_chars = capinc_tty_flush_chars, |
| 1308 | .write_room = capinc_tty_write_room, |
| 1309 | .chars_in_buffer = capinc_tty_chars_in_buffer, |
| 1310 | .ioctl = capinc_tty_ioctl, |
| 1311 | .set_termios = capinc_tty_set_termios, |
| 1312 | .throttle = capinc_tty_throttle, |
| 1313 | .unthrottle = capinc_tty_unthrottle, |
| 1314 | .stop = capinc_tty_stop, |
| 1315 | .start = capinc_tty_start, |
| 1316 | .hangup = capinc_tty_hangup, |
| 1317 | .break_ctl = capinc_tty_break_ctl, |
| 1318 | .flush_buffer = capinc_tty_flush_buffer, |
| 1319 | .set_ldisc = capinc_tty_set_ldisc, |
| 1320 | .send_xchar = capinc_tty_send_xchar, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | }; |
| 1322 | |
| 1323 | static int capinc_tty_init(void) |
| 1324 | { |
| 1325 | struct tty_driver *drv; |
| 1326 | |
| 1327 | if (capi_ttyminors > CAPINC_MAX_PORTS) |
| 1328 | capi_ttyminors = CAPINC_MAX_PORTS; |
| 1329 | if (capi_ttyminors <= 0) |
| 1330 | capi_ttyminors = CAPINC_NR_PORTS; |
| 1331 | |
| 1332 | drv = alloc_tty_driver(capi_ttyminors); |
| 1333 | if (!drv) |
| 1334 | return -ENOMEM; |
| 1335 | |
| 1336 | drv->owner = THIS_MODULE; |
| 1337 | drv->driver_name = "capi_nc"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | drv->name = "capi"; |
| 1339 | drv->major = capi_ttymajor; |
| 1340 | drv->minor_start = 0; |
| 1341 | drv->type = TTY_DRIVER_TYPE_SERIAL; |
| 1342 | drv->subtype = SERIAL_TYPE_NORMAL; |
| 1343 | drv->init_termios = tty_std_termios; |
| 1344 | drv->init_termios.c_iflag = ICRNL; |
| 1345 | drv->init_termios.c_oflag = OPOST | ONLCR; |
| 1346 | drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| 1347 | drv->init_termios.c_lflag = 0; |
| 1348 | drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS; |
| 1349 | tty_set_operations(drv, &capinc_ops); |
| 1350 | if (tty_register_driver(drv)) { |
| 1351 | put_tty_driver(drv); |
| 1352 | printk(KERN_ERR "Couldn't register capi_nc driver\n"); |
| 1353 | return -1; |
| 1354 | } |
| 1355 | capinc_tty_driver = drv; |
| 1356 | return 0; |
| 1357 | } |
| 1358 | |
| 1359 | static void capinc_tty_exit(void) |
| 1360 | { |
| 1361 | struct tty_driver *drv = capinc_tty_driver; |
| 1362 | int retval; |
| 1363 | if ((retval = tty_unregister_driver(drv))) |
| 1364 | printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval); |
| 1365 | put_tty_driver(drv); |
| 1366 | } |
| 1367 | |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 1368 | #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 1369 | |
| 1370 | static inline int capinc_tty_init(void) |
| 1371 | { |
| 1372 | return 0; |
| 1373 | } |
| 1374 | |
| 1375 | static inline void capinc_tty_exit(void) { } |
| 1376 | |
| 1377 | #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | |
| 1379 | /* -------- /proc functions ----------------------------------------- */ |
| 1380 | |
| 1381 | /* |
| 1382 | * /proc/capi/capi20: |
| 1383 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt |
| 1384 | */ |
Alexey Dobriyan | 9a58a80 | 2010-01-14 03:10:54 -0800 | [diff] [blame] | 1385 | static int capi20_proc_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | { |
| 1387 | struct capidev *cdev; |
| 1388 | struct list_head *l; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | |
Jan Kiszka | b8f433d | 2010-02-08 10:12:17 +0000 | [diff] [blame] | 1390 | mutex_lock(&capidev_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | list_for_each(l, &capidev_list) { |
| 1392 | cdev = list_entry(l, struct capidev, list); |
Alexey Dobriyan | 9a58a80 | 2010-01-14 03:10:54 -0800 | [diff] [blame] | 1393 | seq_printf(m, "0 %d %lu %lu %lu %lu\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | cdev->ap.applid, |
| 1395 | cdev->ap.nrecvctlpkt, |
| 1396 | cdev->ap.nrecvdatapkt, |
| 1397 | cdev->ap.nsentctlpkt, |
| 1398 | cdev->ap.nsentdatapkt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | } |
Jan Kiszka | b8f433d | 2010-02-08 10:12:17 +0000 | [diff] [blame] | 1400 | mutex_unlock(&capidev_list_lock); |
Alexey Dobriyan | 9a58a80 | 2010-01-14 03:10:54 -0800 | [diff] [blame] | 1401 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | } |
| 1403 | |
Alexey Dobriyan | 9a58a80 | 2010-01-14 03:10:54 -0800 | [diff] [blame] | 1404 | static int capi20_proc_open(struct inode *inode, struct file *file) |
| 1405 | { |
| 1406 | return single_open(file, capi20_proc_show, NULL); |
| 1407 | } |
| 1408 | |
| 1409 | static const struct file_operations capi20_proc_fops = { |
| 1410 | .owner = THIS_MODULE, |
| 1411 | .open = capi20_proc_open, |
| 1412 | .read = seq_read, |
| 1413 | .llseek = seq_lseek, |
| 1414 | .release = single_release, |
| 1415 | }; |
| 1416 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | /* |
| 1418 | * /proc/capi/capi20ncci: |
| 1419 | * applid ncci |
| 1420 | */ |
Alexey Dobriyan | 9a58a80 | 2010-01-14 03:10:54 -0800 | [diff] [blame] | 1421 | static int capi20ncci_proc_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | { |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 1423 | struct capidev *cdev; |
| 1424 | struct capincci *np; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | |
Jan Kiszka | b8f433d | 2010-02-08 10:12:17 +0000 | [diff] [blame] | 1426 | mutex_lock(&capidev_list_lock); |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 1427 | list_for_each_entry(cdev, &capidev_list, list) { |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 1428 | mutex_lock(&cdev->lock); |
Jan Kiszka | 884f5c4 | 2010-02-08 10:12:22 +0000 | [diff] [blame^] | 1429 | list_for_each_entry(np, &cdev->nccis, list) |
| 1430 | seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci); |
Jan Kiszka | 05b4149 | 2010-02-08 10:12:19 +0000 | [diff] [blame] | 1431 | mutex_unlock(&cdev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | } |
Jan Kiszka | b8f433d | 2010-02-08 10:12:17 +0000 | [diff] [blame] | 1433 | mutex_unlock(&capidev_list_lock); |
Alexey Dobriyan | 9a58a80 | 2010-01-14 03:10:54 -0800 | [diff] [blame] | 1434 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | } |
| 1436 | |
Alexey Dobriyan | 9a58a80 | 2010-01-14 03:10:54 -0800 | [diff] [blame] | 1437 | static int capi20ncci_proc_open(struct inode *inode, struct file *file) |
| 1438 | { |
| 1439 | return single_open(file, capi20ncci_proc_show, NULL); |
| 1440 | } |
| 1441 | |
| 1442 | static const struct file_operations capi20ncci_proc_fops = { |
| 1443 | .owner = THIS_MODULE, |
| 1444 | .open = capi20ncci_proc_open, |
| 1445 | .read = seq_read, |
| 1446 | .llseek = seq_lseek, |
| 1447 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | }; |
| 1449 | |
| 1450 | static void __init proc_init(void) |
| 1451 | { |
Alexey Dobriyan | 9a58a80 | 2010-01-14 03:10:54 -0800 | [diff] [blame] | 1452 | proc_create("capi/capi20", 0, NULL, &capi20_proc_fops); |
| 1453 | proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | } |
| 1455 | |
| 1456 | static void __exit proc_exit(void) |
| 1457 | { |
Alexey Dobriyan | 9a58a80 | 2010-01-14 03:10:54 -0800 | [diff] [blame] | 1458 | remove_proc_entry("capi/capi20", NULL); |
| 1459 | remove_proc_entry("capi/capi20ncci", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | } |
| 1461 | |
| 1462 | /* -------- init function and module interface ---------------------- */ |
| 1463 | |
| 1464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | static int __init capi_init(void) |
| 1466 | { |
Jan Kiszka | 88549d6 | 2010-02-08 10:12:09 +0000 | [diff] [blame] | 1467 | const char *compileinfo; |
Andrew Morton | 6d9eac3 | 2006-03-28 01:56:19 -0800 | [diff] [blame] | 1468 | int major_ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | |
Andrew Morton | 6d9eac3 | 2006-03-28 01:56:19 -0800 | [diff] [blame] | 1470 | major_ret = register_chrdev(capi_major, "capi20", &capi_fops); |
| 1471 | if (major_ret < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); |
Andrew Morton | 6d9eac3 | 2006-03-28 01:56:19 -0800 | [diff] [blame] | 1473 | return major_ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | } |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 1475 | capi_class = class_create(THIS_MODULE, "capi"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | if (IS_ERR(capi_class)) { |
| 1477 | unregister_chrdev(capi_major, "capi20"); |
| 1478 | return PTR_ERR(capi_class); |
| 1479 | } |
| 1480 | |
Greg Kroah-Hartman | a9b1261 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 1481 | device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | if (capinc_tty_init() < 0) { |
Tony Jones | d78b036 | 2007-09-25 02:03:03 +0200 | [diff] [blame] | 1484 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 1485 | class_destroy(capi_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | unregister_chrdev(capi_major, "capi20"); |
| 1487 | return -ENOMEM; |
| 1488 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | |
| 1490 | proc_init(); |
| 1491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) |
| 1493 | compileinfo = " (middleware+capifs)"; |
Jan Kiszka | 501c87a | 2010-02-08 10:12:16 +0000 | [diff] [blame] | 1494 | #elif defined(CONFIG_ISDN_CAPI_MIDDLEWARE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | compileinfo = " (no capifs)"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | #else |
| 1497 | compileinfo = " (no middleware)"; |
| 1498 | #endif |
Jan Kiszka | 88549d6 | 2010-02-08 10:12:09 +0000 | [diff] [blame] | 1499 | printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n", |
| 1500 | capi_major, compileinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | |
| 1502 | return 0; |
| 1503 | } |
| 1504 | |
| 1505 | static void __exit capi_exit(void) |
| 1506 | { |
| 1507 | proc_exit(); |
| 1508 | |
Tony Jones | d78b036 | 2007-09-25 02:03:03 +0200 | [diff] [blame] | 1509 | device_destroy(capi_class, MKDEV(capi_major, 0)); |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 1510 | class_destroy(capi_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | unregister_chrdev(capi_major, "capi20"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1513 | capinc_tty_exit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | } |
| 1515 | |
| 1516 | module_init(capi_init); |
| 1517 | module_exit(capi_exit); |