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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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