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TOMOYO Linux Cross Reference
Linux/include/linux/atmdev.h

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  1 /* atmdev.h - ATM device driver declarations and various related items */
  2 #ifndef LINUX_ATMDEV_H
  3 #define LINUX_ATMDEV_H
  4 
  5 
  6 #include <linux/wait.h> /* wait_queue_head_t */
  7 #include <linux/time.h> /* struct timeval */
  8 #include <linux/net.h>
  9 #include <linux/bug.h>
 10 #include <linux/skbuff.h> /* struct sk_buff */
 11 #include <linux/uio.h>
 12 #include <net/sock.h>
 13 #include <linux/atomic.h>
 14 #include <uapi/linux/atmdev.h>
 15 
 16 #ifdef CONFIG_PROC_FS
 17 #include <linux/proc_fs.h>
 18 
 19 extern struct proc_dir_entry *atm_proc_root;
 20 #endif
 21 
 22 #ifdef CONFIG_COMPAT
 23 #include <linux/compat.h>
 24 struct compat_atm_iobuf {
 25         int length;
 26         compat_uptr_t buffer;
 27 };
 28 #endif
 29 
 30 struct k_atm_aal_stats {
 31 #define __HANDLE_ITEM(i) atomic_t i
 32         __AAL_STAT_ITEMS
 33 #undef __HANDLE_ITEM
 34 };
 35 
 36 
 37 struct k_atm_dev_stats {
 38         struct k_atm_aal_stats aal0;
 39         struct k_atm_aal_stats aal34;
 40         struct k_atm_aal_stats aal5;
 41 };
 42 
 43 struct device;
 44 
 45 enum {
 46         ATM_VF_ADDR,            /* Address is in use. Set by anybody, cleared
 47                                    by device driver. */
 48         ATM_VF_READY,           /* VC is ready to transfer data. Set by device
 49                                    driver, cleared by anybody. */
 50         ATM_VF_PARTIAL,         /* resources are bound to PVC (partial PVC
 51                                    setup), controlled by socket layer */
 52         ATM_VF_REGIS,           /* registered with demon, controlled by SVC
 53                                    socket layer */
 54         ATM_VF_BOUND,           /* local SAP is set, controlled by SVC socket
 55                                    layer */
 56         ATM_VF_RELEASED,        /* demon has indicated/requested release,
 57                                    controlled by SVC socket layer */
 58         ATM_VF_HASQOS,          /* QOS parameters have been set */
 59         ATM_VF_LISTEN,          /* socket is used for listening */
 60         ATM_VF_META,            /* SVC socket isn't used for normal data
 61                                    traffic and doesn't depend on signaling
 62                                    to be available */
 63         ATM_VF_SESSION,         /* VCC is p2mp session control descriptor */
 64         ATM_VF_HASSAP,          /* SAP has been set */
 65         ATM_VF_CLOSE,           /* asynchronous close - treat like VF_RELEASED*/
 66         ATM_VF_WAITING,         /* waiting for reply from sigd */
 67         ATM_VF_IS_CLIP,         /* in use by CLIP protocol */
 68 };
 69 
 70 
 71 #define ATM_VF2VS(flags) \
 72     (test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \
 73      test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \
 74      test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \
 75      test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \
 76      test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE)
 77 
 78 
 79 enum {
 80         ATM_DF_REMOVED,         /* device was removed from atm_devs list */
 81 };
 82 
 83 
 84 #define ATM_PHY_SIG_LOST    0   /* no carrier/light */
 85 #define ATM_PHY_SIG_UNKNOWN 1   /* carrier/light status is unknown */
 86 #define ATM_PHY_SIG_FOUND   2   /* carrier/light okay */
 87 
 88 #define ATM_ATMOPT_CLP  1       /* set CLP bit */
 89 
 90 struct atm_vcc {
 91         /* struct sock has to be the first member of atm_vcc */
 92         struct sock     sk;
 93         unsigned long   flags;          /* VCC flags (ATM_VF_*) */
 94         short           vpi;            /* VPI and VCI (types must be equal */
 95                                         /* with sockaddr) */
 96         int             vci;
 97         unsigned long   aal_options;    /* AAL layer options */
 98         unsigned long   atm_options;    /* ATM layer options */
 99         struct atm_dev  *dev;           /* device back pointer */
100         struct atm_qos  qos;            /* QOS */
101         struct atm_sap  sap;            /* SAP */
102         void (*release_cb)(struct atm_vcc *vcc); /* release_sock callback */
103         void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
104         void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
105         int (*push_oam)(struct atm_vcc *vcc,void *cell);
106         int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
107         void            *dev_data;      /* per-device data */
108         void            *proto_data;    /* per-protocol data */
109         struct k_atm_aal_stats *stats;  /* pointer to AAL stats group */
110         struct module *owner;           /* owner of ->push function */
111         /* SVC part --- may move later ------------------------------------- */
112         short           itf;            /* interface number */
113         struct sockaddr_atmsvc local;
114         struct sockaddr_atmsvc remote;
115         /* Multipoint part ------------------------------------------------- */
116         struct atm_vcc  *session;       /* session VCC descriptor */
117         /* Other stuff ----------------------------------------------------- */
118         void            *user_back;     /* user backlink - not touched by */
119                                         /* native ATM stack. Currently used */
120                                         /* by CLIP and sch_atm. */
121 };
122 
123 static inline struct atm_vcc *atm_sk(struct sock *sk)
124 {
125         return (struct atm_vcc *)sk;
126 }
127 
128 static inline struct atm_vcc *ATM_SD(struct socket *sock)
129 {
130         return atm_sk(sock->sk);
131 }
132 
133 static inline struct sock *sk_atm(struct atm_vcc *vcc)
134 {
135         return (struct sock *)vcc;
136 }
137 
138 struct atm_dev_addr {
139         struct sockaddr_atmsvc addr;    /* ATM address */
140         struct list_head entry;         /* next address */
141 };
142 
143 enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };
144 
145 struct atm_dev {
146         const struct atmdev_ops *ops;   /* device operations; NULL if unused */
147         const struct atmphy_ops *phy;   /* PHY operations, may be undefined */
148                                         /* (NULL) */
149         const char      *type;          /* device type name */
150         int             number;         /* device index */
151         void            *dev_data;      /* per-device data */
152         void            *phy_data;      /* private PHY date */
153         unsigned long   flags;          /* device flags (ATM_DF_*) */
154         struct list_head local;         /* local ATM addresses */
155         struct list_head lecs;          /* LECS ATM addresses learned via ILMI */
156         unsigned char   esi[ESI_LEN];   /* ESI ("MAC" addr) */
157         struct atm_cirange ci_range;    /* VPI/VCI range */
158         struct k_atm_dev_stats stats;   /* statistics */
159         char            signal;         /* signal status (ATM_PHY_SIG_*) */
160         int             link_rate;      /* link rate (default: OC3) */
161         atomic_t        refcnt;         /* reference count */
162         spinlock_t      lock;           /* protect internal members */
163 #ifdef CONFIG_PROC_FS
164         struct proc_dir_entry *proc_entry; /* proc entry */
165         char *proc_name;                /* proc entry name */
166 #endif
167         struct device class_dev;        /* sysfs device */
168         struct list_head dev_list;      /* linkage */
169 };
170 
171  
172 /* OF: send_Oam Flags */
173 
174 #define ATM_OF_IMMED  1         /* Attempt immediate delivery */
175 #define ATM_OF_INRATE 2         /* Attempt in-rate delivery */
176 
177 
178 /*
179  * ioctl, getsockopt, and setsockopt are optional and can be set to NULL.
180  */
181 
182 struct atmdev_ops { /* only send is required */
183         void (*dev_close)(struct atm_dev *dev);
184         int (*open)(struct atm_vcc *vcc);
185         void (*close)(struct atm_vcc *vcc);
186         int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
187 #ifdef CONFIG_COMPAT
188         int (*compat_ioctl)(struct atm_dev *dev,unsigned int cmd,
189                             void __user *arg);
190 #endif
191         int (*getsockopt)(struct atm_vcc *vcc,int level,int optname,
192             void __user *optval,int optlen);
193         int (*setsockopt)(struct atm_vcc *vcc,int level,int optname,
194             void __user *optval,unsigned int optlen);
195         int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
196         int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
197         void (*phy_put)(struct atm_dev *dev,unsigned char value,
198             unsigned long addr);
199         unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr);
200         int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags);
201         int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page);
202         struct module *owner;
203 };
204 
205 struct atmphy_ops {
206         int (*start)(struct atm_dev *dev);
207         int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
208         void (*interrupt)(struct atm_dev *dev);
209         int (*stop)(struct atm_dev *dev);
210 };
211 
212 struct atm_skb_data {
213         struct atm_vcc  *vcc;           /* ATM VCC */
214         unsigned long   atm_options;    /* ATM layer options */
215 };
216 
217 #define VCC_HTABLE_SIZE 32
218 
219 extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
220 extern rwlock_t vcc_sklist_lock;
221 
222 #define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
223 
224 struct atm_dev *atm_dev_register(const char *type, struct device *parent,
225                                  const struct atmdev_ops *ops,
226                                  int number, /* -1 == pick first available */
227                                  unsigned long *flags);
228 struct atm_dev *atm_dev_lookup(int number);
229 void atm_dev_deregister(struct atm_dev *dev);
230 
231 /* atm_dev_signal_change
232  *
233  * Propagate lower layer signal change in atm_dev->signal to netdevice.
234  * The event will be sent via a notifier call chain.
235  */
236 void atm_dev_signal_change(struct atm_dev *dev, char signal);
237 
238 void vcc_insert_socket(struct sock *sk);
239 
240 void atm_dev_release_vccs(struct atm_dev *dev);
241 
242 
243 static inline void atm_force_charge(struct atm_vcc *vcc,int truesize)
244 {
245         atomic_add(truesize, &sk_atm(vcc)->sk_rmem_alloc);
246 }
247 
248 
249 static inline void atm_return(struct atm_vcc *vcc,int truesize)
250 {
251         atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc);
252 }
253 
254 
255 static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size)
256 {
257         return (size + atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) <
258                sk_atm(vcc)->sk_sndbuf;
259 }
260 
261 
262 static inline void atm_dev_hold(struct atm_dev *dev)
263 {
264         atomic_inc(&dev->refcnt);
265 }
266 
267 
268 static inline void atm_dev_put(struct atm_dev *dev)
269 {
270         if (atomic_dec_and_test(&dev->refcnt)) {
271                 BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
272                 if (dev->ops->dev_close)
273                         dev->ops->dev_close(dev);
274                 put_device(&dev->class_dev);
275         }
276 }
277 
278 
279 int atm_charge(struct atm_vcc *vcc,int truesize);
280 struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
281     gfp_t gfp_flags);
282 int atm_pcr_goal(const struct atm_trafprm *tp);
283 
284 void vcc_release_async(struct atm_vcc *vcc, int reply);
285 
286 struct atm_ioctl {
287         struct module *owner;
288         /* A module reference is kept if appropriate over this call.
289          * Return -ENOIOCTLCMD if you don't handle it. */
290         int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg);
291         struct list_head list;
292 };
293 
294 /**
295  * register_atm_ioctl - register handler for ioctl operations
296  *
297  * Special (non-device) handlers of ioctl's should
298  * register here. If you're a normal device, you should
299  * set .ioctl in your atmdev_ops instead.
300  */
301 void register_atm_ioctl(struct atm_ioctl *);
302 
303 /**
304  * deregister_atm_ioctl - remove the ioctl handler
305  */
306 void deregister_atm_ioctl(struct atm_ioctl *);
307 
308 
309 /* register_atmdevice_notifier - register atm_dev notify events
310  *
311  * Clients like br2684 will register notify events
312  * Currently we notify of signal found/lost
313  */
314 int register_atmdevice_notifier(struct notifier_block *nb);
315 void unregister_atmdevice_notifier(struct notifier_block *nb);
316 
317 #endif
318 

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