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/include/linux/atmdev.h

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C Header | 535 lines | 325 code | 103 blank | 107 comment | 2 complexity | d36589f6f0015e63673fe013f6e9ed56 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
  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
 40struct atm_aal_stats {
 41#define __HANDLE_ITEM(i) int i
 42	__AAL_STAT_ITEMS
 43#undef __HANDLE_ITEM
 44};
 45
 46
 47struct 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
159struct 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 
168struct 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 <linux/atomic.h>
224
225#ifdef CONFIG_PROC_FS
226#include <linux/proc_fs.h>
227
228extern struct proc_dir_entry *atm_proc_root;
229#endif
230
231#ifdef CONFIG_COMPAT
232#include <linux/compat.h>
233struct compat_atm_iobuf {
234	int length;
235	compat_uptr_t buffer;
236};
237#endif
238
239struct k_atm_aal_stats {
240#define __HANDLE_ITEM(i) atomic_t i
241	__AAL_STAT_ITEMS
242#undef __HANDLE_ITEM
243};
244
245
246struct 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
253enum {
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
287enum {
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
298struct 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
329static inline struct atm_vcc *atm_sk(struct sock *sk)
330{
331	return (struct atm_vcc *)sk;
332}
333
334static inline struct atm_vcc *ATM_SD(struct socket *sock)
335{
336	return atm_sk(sock->sk);
337}
338
339static inline struct sock *sk_atm(struct atm_vcc *vcc)
340{
341	return (struct sock *)vcc;
342}
343
344struct atm_dev_addr {
345	struct sockaddr_atmsvc addr;	/* ATM address */
346	struct list_head entry;		/* next address */
347};
348
349enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };
350
351struct 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
388struct 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
411struct 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
418struct 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
425extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
426extern rwlock_t vcc_sklist_lock;
427
428#define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
429
430struct 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);
434struct atm_dev *atm_dev_lookup(int number);
435void 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 */
442void atm_dev_signal_change(struct atm_dev *dev, char signal);
443
444void vcc_insert_socket(struct sock *sk);
445
446void atm_dev_release_vccs(struct atm_dev *dev);
447
448/*
449 * This is approximately the algorithm used by alloc_skb.
450 *
451 */
452
453static inline int atm_guess_pdu2truesize(int size)
454{
455	return SKB_DATA_ALIGN(size) + sizeof(struct skb_shared_info);
456}
457
458
459static 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
465static inline void atm_return(struct atm_vcc *vcc,int truesize)
466{
467	atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc);
468}
469
470
471static 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
478static inline void atm_dev_hold(struct atm_dev *dev)
479{
480	atomic_inc(&dev->refcnt);
481}
482
483
484static 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
495int atm_charge(struct atm_vcc *vcc,int truesize);
496struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
497    gfp_t gfp_flags);
498int atm_pcr_goal(const struct atm_trafprm *tp);
499
500void vcc_release_async(struct atm_vcc *vcc, int reply);
501
502struct 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 */
517void register_atm_ioctl(struct atm_ioctl *);
518
519/**
520 * deregister_atm_ioctl - remove the ioctl handler
521 */
522void 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 */
530int register_atmdevice_notifier(struct notifier_block *nb);
531void unregister_atmdevice_notifier(struct notifier_block *nb);
532
533#endif /* __KERNEL__ */
534
535#endif