1 /* atmdev.h - ATM device driver declarations and various related items */
2
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4
5
6 #ifndef LINUX_ATMDEV_H
7 #define LINUX_ATMDEV_H
8
9
10 #include <linux/atmapi.h>
11 #include <linux/atm.h>
12 #include <linux/atmioc.h>
13
14
15 #define ESI_LEN 6
16
17 #define ATM_OC3_PCR (155520000/270*260/8/53)
18 /* OC3 link rate: 155520000 bps
19 SONET overhead: /270*260 (9 section, 1 path)
20 bits per cell: /8/53
21 max cell rate: 353207.547 cells/sec */
22 #define ATM_25_PCR ((25600000/8-8000)/54)
23 /* 25 Mbps ATM cell rate (59111) */
24 #define ATM_OC12_PCR (622080000/1080*1040/8/53)
25 /* OC12 link rate: 622080000 bps
26 SONET overhead: /1080*1040
27 bits per cell: /8/53
28 max cell rate: 1412830.188 cells/sec */
29 #define ATM_DS3_PCR (8000*12)
30 /* DS3: 12 cells in a 125 usec time slot */
31
32
33 #define __AAL_STAT_ITEMS \
34 __HANDLE_ITEM(tx); /* TX okay */ \
35 __HANDLE_ITEM(tx_err); /* TX errors */ \
36 __HANDLE_ITEM(rx); /* RX okay */ \
37 __HANDLE_ITEM(rx_err); /* RX errors */ \
38 __HANDLE_ITEM(rx_drop); /* RX out of memory */
39
40 struct atm_aal_stats {
41 #define __HANDLE_ITEM(i) int i
42 __AAL_STAT_ITEMS
43 #undef __HANDLE_ITEM
44 };
45
46
47 struct atm_dev_stats {
48 struct atm_aal_stats aal0;
49 struct atm_aal_stats aal34;
50 struct atm_aal_stats aal5;
51 } __ATM_API_ALIGN;
52
53
54 #define ATM_GETLINKRATE _IOW('a',ATMIOC_ITF+1,struct atmif_sioc)
55 /* get link rate */
56 #define ATM_GETNAMES _IOW('a',ATMIOC_ITF+3,struct atm_iobuf)
57 /* get interface names (numbers) */
58 #define ATM_GETTYPE _IOW('a',ATMIOC_ITF+4,struct atmif_sioc)
59 /* get interface type name */
60 #define ATM_GETESI _IOW('a',ATMIOC_ITF+5,struct atmif_sioc)
61 /* get interface ESI */
62 #define ATM_GETADDR _IOW('a',ATMIOC_ITF+6,struct atmif_sioc)
63 /* get itf's local ATM addr. list */
64 #define ATM_RSTADDR _IOW('a',ATMIOC_ITF+7,struct atmif_sioc)
65 /* reset itf's ATM address list */
66 #define ATM_ADDADDR _IOW('a',ATMIOC_ITF+8,struct atmif_sioc)
67 /* add a local ATM address */
68 #define ATM_DELADDR _IOW('a',ATMIOC_ITF+9,struct atmif_sioc)
69 /* remove a local ATM address */
70 #define ATM_GETCIRANGE _IOW('a',ATMIOC_ITF+10,struct atmif_sioc)
71 /* get connection identifier range */
72 #define ATM_SETCIRANGE _IOW('a',ATMIOC_ITF+11,struct atmif_sioc)
73 /* set connection identifier range */
74 #define ATM_SETESI _IOW('a',ATMIOC_ITF+12,struct atmif_sioc)
75 /* set interface ESI */
76 #define ATM_SETESIF _IOW('a',ATMIOC_ITF+13,struct atmif_sioc)
77 /* force interface ESI */
78 #define ATM_ADDLECSADDR _IOW('a', ATMIOC_ITF+14, struct atmif_sioc)
79 /* register a LECS address */
80 #define ATM_DELLECSADDR _IOW('a', ATMIOC_ITF+15, struct atmif_sioc)
81 /* unregister a LECS address */
82 #define ATM_GETLECSADDR _IOW('a', ATMIOC_ITF+16, struct atmif_sioc)
83 /* retrieve LECS address(es) */
84
85 #define ATM_GETSTAT _IOW('a',ATMIOC_SARCOM+0,struct atmif_sioc)
86 /* get AAL layer statistics */
87 #define ATM_GETSTATZ _IOW('a',ATMIOC_SARCOM+1,struct atmif_sioc)
88 /* get AAL layer statistics and zero */
89 #define ATM_GETLOOP _IOW('a',ATMIOC_SARCOM+2,struct atmif_sioc)
90 /* get loopback mode */
91 #define ATM_SETLOOP _IOW('a',ATMIOC_SARCOM+3,struct atmif_sioc)
92 /* set loopback mode */
93 #define ATM_QUERYLOOP _IOW('a',ATMIOC_SARCOM+4,struct atmif_sioc)
94 /* query supported loopback modes */
95 #define ATM_SETSC _IOW('a',ATMIOC_SPECIAL+1,int)
96 /* enable or disable single-copy */
97 #define ATM_SETBACKEND _IOW('a',ATMIOC_SPECIAL+2,atm_backend_t)
98 /* set backend handler */
99 #define ATM_NEWBACKENDIF _IOW('a',ATMIOC_SPECIAL+3,atm_backend_t)
100 /* use backend to make new if */
101 #define ATM_ADDPARTY _IOW('a', ATMIOC_SPECIAL+4,struct atm_iobuf)
102 /* add party to p2mp call */
103 #ifdef CONFIG_COMPAT
104 /* It actually takes struct sockaddr_atmsvc, not struct atm_iobuf */
105 #define COMPAT_ATM_ADDPARTY _IOW('a', ATMIOC_SPECIAL+4,struct compat_atm_iobuf)
106 #endif
107 #define ATM_DROPPARTY _IOW('a', ATMIOC_SPECIAL+5,int)
108 /* drop party from p2mp call */
109
110 /*
111 * These are backend handkers that can be set via the ATM_SETBACKEND call
112 * above. In the future we may support dynamic loading of these - for now,
113 * they're just being used to share the ATMIOC_BACKEND ioctls
114 */
115 #define ATM_BACKEND_RAW 0
116 #define ATM_BACKEND_PPP 1 /* PPPoATM - RFC2364 */
117 #define ATM_BACKEND_BR2684 2 /* Bridged RFC1483/2684 */
118
119 /* for ATM_GETTYPE */
120 #define ATM_ITFTYP_LEN 8 /* maximum length of interface type name */
121
122 /*
123 * Loopback modes for ATM_{PHY,SAR}_{GET,SET}LOOP
124 */
125
126 /* Point of loopback CPU-->SAR-->PHY-->line--> ... */
127 #define __ATM_LM_NONE 0 /* no loop back ^ ^ ^ ^ */
128 #define __ATM_LM_AAL 1 /* loop back PDUs --' | | | */
129 #define __ATM_LM_ATM 2 /* loop back ATM cells ---' | | */
130 /* RESERVED 4 loop back on PHY side ---' */
131 #define __ATM_LM_PHY 8 /* loop back bits (digital) ----' | */
132 #define __ATM_LM_ANALOG 16 /* loop back the analog signal --------' */
133
134 /* Direction of loopback */
135 #define __ATM_LM_MKLOC(n) ((n)) /* Local (i.e. loop TX to RX) */
136 #define __ATM_LM_MKRMT(n) ((n) << 8) /* Remote (i.e. loop RX to TX) */
137
138 #define __ATM_LM_XTLOC(n) ((n) & 0xff)
139 #define __ATM_LM_XTRMT(n) (((n) >> 8) & 0xff)
140
141 #define ATM_LM_NONE 0 /* no loopback */
142
143 #define ATM_LM_LOC_AAL __ATM_LM_MKLOC(__ATM_LM_AAL)
144 #define ATM_LM_LOC_ATM __ATM_LM_MKLOC(__ATM_LM_ATM)
145 #define ATM_LM_LOC_PHY __ATM_LM_MKLOC(__ATM_LM_PHY)
146 #define ATM_LM_LOC_ANALOG __ATM_LM_MKLOC(__ATM_LM_ANALOG)
147
148 #define ATM_LM_RMT_AAL __ATM_LM_MKRMT(__ATM_LM_AAL)
149 #define ATM_LM_RMT_ATM __ATM_LM_MKRMT(__ATM_LM_ATM)
150 #define ATM_LM_RMT_PHY __ATM_LM_MKRMT(__ATM_LM_PHY)
151 #define ATM_LM_RMT_ANALOG __ATM_LM_MKRMT(__ATM_LM_ANALOG)
152
153 /*
154 * Note: ATM_LM_LOC_* and ATM_LM_RMT_* can be combined, provided that
155 * __ATM_LM_XTLOC(x) <= __ATM_LM_XTRMT(x)
156 */
157
158
159 struct atm_iobuf {
160 int length;
161 void __user *buffer;
162 };
163
164 /* for ATM_GETCIRANGE / ATM_SETCIRANGE */
165
166 #define ATM_CI_MAX -1 /* use maximum range of VPI/VCI */
167
168 struct atm_cirange {
169 signed char vpi_bits; /* 1..8, ATM_CI_MAX (-1) for maximum */
170 signed char vci_bits; /* 1..16, ATM_CI_MAX (-1) for maximum */
171 };
172
173 /* for ATM_SETSC; actually taken from the ATM_VF number space */
174
175 #define ATM_SC_RX 1024 /* enable RX single-copy */
176 #define ATM_SC_TX 2048 /* enable TX single-copy */
177
178 #define ATM_BACKLOG_DEFAULT 32 /* if we get more, we're likely to time out
179 anyway */
180
181 /* MF: change_qos (Modify) flags */
182
183 #define ATM_MF_IMMED 1 /* Block until change is effective */
184 #define ATM_MF_INC_RSV 2 /* Change reservation on increase */
185 #define ATM_MF_INC_SHP 4 /* Change shaping on increase */
186 #define ATM_MF_DEC_RSV 8 /* Change reservation on decrease */
187 #define ATM_MF_DEC_SHP 16 /* Change shaping on decrease */
188 #define ATM_MF_BWD 32 /* Set the backward direction parameters */
189
190 #define ATM_MF_SET (ATM_MF_INC_RSV | ATM_MF_INC_SHP | ATM_MF_DEC_RSV | \
191 ATM_MF_DEC_SHP | ATM_MF_BWD)
192
193 /*
194 * ATM_VS_* are used to express VC state in a human-friendly way.
195 */
196
197 #define ATM_VS_IDLE 0 /* VC is not used */
198 #define ATM_VS_CONNECTED 1 /* VC is connected */
199 #define ATM_VS_CLOSING 2 /* VC is closing */
200 #define ATM_VS_LISTEN 3 /* VC is listening for incoming setups */
201 #define ATM_VS_INUSE 4 /* VC is in use (registered with atmsigd) */
202 #define ATM_VS_BOUND 5 /* VC is bound */
203
204 #define ATM_VS2TXT_MAP \
205 "IDLE", "CONNECTED", "CLOSING", "LISTEN", "INUSE", "BOUND"
206
207 #define ATM_VF2TXT_MAP \
208 "ADDR", "READY", "PARTIAL", "REGIS", \
209 "RELEASED", "HASQOS", "LISTEN", "META", \
210 "256", "512", "1024", "2048", \
211 "SESSION", "HASSAP", "BOUND", "CLOSE"
212
213
214 #ifdef __KERNEL__
215
216 #include <linux/device.h>
217 #include <linux/wait.h> /* wait_queue_head_t */
218 #include <linux/time.h> /* struct timeval */
219 #include <linux/net.h>
220 #include <linux/skbuff.h> /* struct sk_buff */
221 #include <linux/uio.h>
222 #include <net/sock.h>
223 #include <asm/atomic.h>
224
225 #ifdef CONFIG_PROC_FS
226 #include <linux/proc_fs.h>
227
228 extern struct proc_dir_entry *atm_proc_root;
229 #endif
230
231 #ifdef CONFIG_COMPAT
232 #include <linux/compat.h>
233 struct compat_atm_iobuf {
234 int length;
235 compat_uptr_t buffer;
236 };
237 #endif
238
239 struct k_atm_aal_stats {
240 #define __HANDLE_ITEM(i) atomic_t i
241 __AAL_STAT_ITEMS
242 #undef __HANDLE_ITEM
243 };
244
245
246 struct k_atm_dev_stats {
247 struct k_atm_aal_stats aal0;
248 struct k_atm_aal_stats aal34;
249 struct k_atm_aal_stats aal5;
250 };
251
252
253 enum {
254 ATM_VF_ADDR, /* Address is in use. Set by anybody, cleared
255 by device driver. */
256 ATM_VF_READY, /* VC is ready to transfer data. Set by device
257 driver, cleared by anybody. */
258 ATM_VF_PARTIAL, /* resources are bound to PVC (partial PVC
259 setup), controlled by socket layer */
260 ATM_VF_REGIS, /* registered with demon, controlled by SVC
261 socket layer */
262 ATM_VF_BOUND, /* local SAP is set, controlled by SVC socket
263 layer */
264 ATM_VF_RELEASED, /* demon has indicated/requested release,
265 controlled by SVC socket layer */
266 ATM_VF_HASQOS, /* QOS parameters have been set */
267 ATM_VF_LISTEN, /* socket is used for listening */
268 ATM_VF_META, /* SVC socket isn't used for normal data
269 traffic and doesn't depend on signaling
270 to be available */
271 ATM_VF_SESSION, /* VCC is p2mp session control descriptor */
272 ATM_VF_HASSAP, /* SAP has been set */
273 ATM_VF_CLOSE, /* asynchronous close - treat like VF_RELEASED*/
274 ATM_VF_WAITING, /* waiting for reply from sigd */
275 ATM_VF_IS_CLIP, /* in use by CLIP protocol */
276 };
277
278
279 #define ATM_VF2VS(flags) \
280 (test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \
281 test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \
282 test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \
283 test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \
284 test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE)
285
286
287 enum {
288 ATM_DF_REMOVED, /* device was removed from atm_devs list */
289 };
290
291
292 #define ATM_PHY_SIG_LOST 0 /* no carrier/light */
293 #define ATM_PHY_SIG_UNKNOWN 1 /* carrier/light status is unknown */
294 #define ATM_PHY_SIG_FOUND 2 /* carrier/light okay */
295
296 #define ATM_ATMOPT_CLP 1 /* set CLP bit */
297
298 struct atm_vcc {
299 /* struct sock has to be the first member of atm_vcc */
300 struct sock sk;
301 unsigned long flags; /* VCC flags (ATM_VF_*) */
302 short vpi; /* VPI and VCI (types must be equal */
303 /* with sockaddr) */
304 int vci;
305 unsigned long aal_options; /* AAL layer options */
306 unsigned long atm_options; /* ATM layer options */
307 struct atm_dev *dev; /* device back pointer */
308 struct atm_qos qos; /* QOS */
309 struct atm_sap sap; /* SAP */
310 void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
311 void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
312 int (*push_oam)(struct atm_vcc *vcc,void *cell);
313 int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
314 void *dev_data; /* per-device data */
315 void *proto_data; /* per-protocol data */
316 struct k_atm_aal_stats *stats; /* pointer to AAL stats group */
317 /* SVC part --- may move later ------------------------------------- */
318 short itf; /* interface number */
319 struct sockaddr_atmsvc local;
320 struct sockaddr_atmsvc remote;
321 /* Multipoint part ------------------------------------------------- */
322 struct atm_vcc *session; /* session VCC descriptor */
323 /* Other stuff ----------------------------------------------------- */
324 void *user_back; /* user backlink - not touched by */
325 /* native ATM stack. Currently used */
326 /* by CLIP and sch_atm. */
327 };
328
atm_sk(struct sock * sk)329 static inline struct atm_vcc *atm_sk(struct sock *sk)
330 {
331 return (struct atm_vcc *)sk;
332 }
333
ATM_SD(struct socket * sock)334 static inline struct atm_vcc *ATM_SD(struct socket *sock)
335 {
336 return atm_sk(sock->sk);
337 }
338
sk_atm(struct atm_vcc * vcc)339 static inline struct sock *sk_atm(struct atm_vcc *vcc)
340 {
341 return (struct sock *)vcc;
342 }
343
344 struct atm_dev_addr {
345 struct sockaddr_atmsvc addr; /* ATM address */
346 struct list_head entry; /* next address */
347 };
348
349 enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };
350
351 struct atm_dev {
352 const struct atmdev_ops *ops; /* device operations; NULL if unused */
353 const struct atmphy_ops *phy; /* PHY operations, may be undefined */
354 /* (NULL) */
355 const char *type; /* device type name */
356 int number; /* device index */
357 void *dev_data; /* per-device data */
358 void *phy_data; /* private PHY date */
359 unsigned long flags; /* device flags (ATM_DF_*) */
360 struct list_head local; /* local ATM addresses */
361 struct list_head lecs; /* LECS ATM addresses learned via ILMI */
362 unsigned char esi[ESI_LEN]; /* ESI ("MAC" addr) */
363 struct atm_cirange ci_range; /* VPI/VCI range */
364 struct k_atm_dev_stats stats; /* statistics */
365 char signal; /* signal status (ATM_PHY_SIG_*) */
366 int link_rate; /* link rate (default: OC3) */
367 atomic_t refcnt; /* reference count */
368 spinlock_t lock; /* protect internal members */
369 #ifdef CONFIG_PROC_FS
370 struct proc_dir_entry *proc_entry; /* proc entry */
371 char *proc_name; /* proc entry name */
372 #endif
373 struct device class_dev; /* sysfs device */
374 struct list_head dev_list; /* linkage */
375 };
376
377
378 /* OF: send_Oam Flags */
379
380 #define ATM_OF_IMMED 1 /* Attempt immediate delivery */
381 #define ATM_OF_INRATE 2 /* Attempt in-rate delivery */
382
383
384 /*
385 * ioctl, getsockopt, and setsockopt are optional and can be set to NULL.
386 */
387
388 struct atmdev_ops { /* only send is required */
389 void (*dev_close)(struct atm_dev *dev);
390 int (*open)(struct atm_vcc *vcc);
391 void (*close)(struct atm_vcc *vcc);
392 int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
393 #ifdef CONFIG_COMPAT
394 int (*compat_ioctl)(struct atm_dev *dev,unsigned int cmd,
395 void __user *arg);
396 #endif
397 int (*getsockopt)(struct atm_vcc *vcc,int level,int optname,
398 void __user *optval,int optlen);
399 int (*setsockopt)(struct atm_vcc *vcc,int level,int optname,
400 void __user *optval,unsigned int optlen);
401 int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
402 int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
403 void (*phy_put)(struct atm_dev *dev,unsigned char value,
404 unsigned long addr);
405 unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr);
406 int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags);
407 int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page);
408 struct module *owner;
409 };
410
411 struct atmphy_ops {
412 int (*start)(struct atm_dev *dev);
413 int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
414 void (*interrupt)(struct atm_dev *dev);
415 int (*stop)(struct atm_dev *dev);
416 };
417
418 struct atm_skb_data {
419 struct atm_vcc *vcc; /* ATM VCC */
420 unsigned long atm_options; /* ATM layer options */
421 };
422
423 #define VCC_HTABLE_SIZE 32
424
425 extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
426 extern rwlock_t vcc_sklist_lock;
427
428 #define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
429
430 struct atm_dev *atm_dev_register(const char *type, struct device *parent,
431 const struct atmdev_ops *ops,
432 int number, /* -1 == pick first available */
433 unsigned long *flags);
434 struct atm_dev *atm_dev_lookup(int number);
435 void atm_dev_deregister(struct atm_dev *dev);
436
437 /* atm_dev_signal_change
438 *
439 * Propagate lower layer signal change in atm_dev->signal to netdevice.
440 * The event will be sent via a notifier call chain.
441 */
442 void atm_dev_signal_change(struct atm_dev *dev, char signal);
443
444 void vcc_insert_socket(struct sock *sk);
445
446 void atm_dev_release_vccs(struct atm_dev *dev);
447
448 /*
449 * This is approximately the algorithm used by alloc_skb.
450 *
451 */
452
atm_guess_pdu2truesize(int size)453 static inline int atm_guess_pdu2truesize(int size)
454 {
455 return SKB_DATA_ALIGN(size) + sizeof(struct skb_shared_info);
456 }
457
458
atm_force_charge(struct atm_vcc * vcc,int truesize)459 static inline void atm_force_charge(struct atm_vcc *vcc,int truesize)
460 {
461 atomic_add(truesize, &sk_atm(vcc)->sk_rmem_alloc);
462 }
463
464
atm_return(struct atm_vcc * vcc,int truesize)465 static inline void atm_return(struct atm_vcc *vcc,int truesize)
466 {
467 atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc);
468 }
469
470
atm_may_send(struct atm_vcc * vcc,unsigned int size)471 static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size)
472 {
473 return (size + atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) <
474 sk_atm(vcc)->sk_sndbuf;
475 }
476
477
atm_dev_hold(struct atm_dev * dev)478 static inline void atm_dev_hold(struct atm_dev *dev)
479 {
480 atomic_inc(&dev->refcnt);
481 }
482
483
atm_dev_put(struct atm_dev * dev)484 static inline void atm_dev_put(struct atm_dev *dev)
485 {
486 if (atomic_dec_and_test(&dev->refcnt)) {
487 BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
488 if (dev->ops->dev_close)
489 dev->ops->dev_close(dev);
490 put_device(&dev->class_dev);
491 }
492 }
493
494
495 int atm_charge(struct atm_vcc *vcc,int truesize);
496 struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
497 gfp_t gfp_flags);
498 int atm_pcr_goal(const struct atm_trafprm *tp);
499
500 void vcc_release_async(struct atm_vcc *vcc, int reply);
501
502 struct atm_ioctl {
503 struct module *owner;
504 /* A module reference is kept if appropriate over this call.
505 * Return -ENOIOCTLCMD if you don't handle it. */
506 int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg);
507 struct list_head list;
508 };
509
510 /**
511 * register_atm_ioctl - register handler for ioctl operations
512 *
513 * Special (non-device) handlers of ioctl's should
514 * register here. If you're a normal device, you should
515 * set .ioctl in your atmdev_ops instead.
516 */
517 void register_atm_ioctl(struct atm_ioctl *);
518
519 /**
520 * deregister_atm_ioctl - remove the ioctl handler
521 */
522 void deregister_atm_ioctl(struct atm_ioctl *);
523
524
525 /* register_atmdevice_notifier - register atm_dev notify events
526 *
527 * Clients like br2684 will register notify events
528 * Currently we notify of signal found/lost
529 */
530 int register_atmdevice_notifier(struct notifier_block *nb);
531 void unregister_atmdevice_notifier(struct notifier_block *nb);
532
533 #endif /* __KERNEL__ */
534
535 #endif
536