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#define ATM_DROPPARTY _IOW('a', ATMIOC_SPECIAL+5,int) 104 /* drop party from p2mp call */ 105 106/* 107 * These are backend handkers that can be set via the ATM_SETBACKEND call 108 * above. In the future we may support dynamic loading of these - for now, 109 * they're just being used to share the ATMIOC_BACKEND ioctls 110 */ 111#define ATM_BACKEND_RAW 0 112#define ATM_BACKEND_PPP 1 /* PPPoATM - RFC2364 */ 113#define ATM_BACKEND_BR2684 2 /* Bridged RFC1483/2684 */ 114 115/* for ATM_GETTYPE */ 116#define ATM_ITFTYP_LEN 8 /* maximum length of interface type name */ 117 118/* 119 * Loopback modes for ATM_{PHY,SAR}_{GET,SET}LOOP 120 */ 121 122/* Point of loopback CPU-->SAR-->PHY-->line--> ... */ 123#define __ATM_LM_NONE 0 /* no loop back ^ ^ ^ ^ */ 124#define __ATM_LM_AAL 1 /* loop back PDUs --' | | | */ 125#define __ATM_LM_ATM 2 /* loop back ATM cells ---' | | */ 126/* RESERVED 4 loop back on PHY side ---' */ 127#define __ATM_LM_PHY 8 /* loop back bits (digital) ----' | */ 128#define __ATM_LM_ANALOG 16 /* loop back the analog signal --------' */ 129 130/* Direction of loopback */ 131#define __ATM_LM_MKLOC(n) ((n)) /* Local (i.e. loop TX to RX) */ 132#define __ATM_LM_MKRMT(n) ((n) << 8) /* Remote (i.e. loop RX to TX) */ 133 134#define __ATM_LM_XTLOC(n) ((n) & 0xff) 135#define __ATM_LM_XTRMT(n) (((n) >> 8) & 0xff) 136 137#define ATM_LM_NONE 0 /* no loopback */ 138 139#define ATM_LM_LOC_AAL __ATM_LM_MKLOC(__ATM_LM_AAL) 140#define ATM_LM_LOC_ATM __ATM_LM_MKLOC(__ATM_LM_ATM) 141#define ATM_LM_LOC_PHY __ATM_LM_MKLOC(__ATM_LM_PHY) 142#define ATM_LM_LOC_ANALOG __ATM_LM_MKLOC(__ATM_LM_ANALOG) 143 144#define ATM_LM_RMT_AAL __ATM_LM_MKRMT(__ATM_LM_AAL) 145#define ATM_LM_RMT_ATM __ATM_LM_MKRMT(__ATM_LM_ATM) 146#define ATM_LM_RMT_PHY __ATM_LM_MKRMT(__ATM_LM_PHY) 147#define ATM_LM_RMT_ANALOG __ATM_LM_MKRMT(__ATM_LM_ANALOG) 148 149/* 150 * Note: ATM_LM_LOC_* and ATM_LM_RMT_* can be combined, provided that 151 * __ATM_LM_XTLOC(x) <= __ATM_LM_XTRMT(x) 152 */ 153 154 155struct atm_iobuf { 156 int length; 157 void __user *buffer; 158}; 159 160/* for ATM_GETCIRANGE / ATM_SETCIRANGE */ 161 162#define ATM_CI_MAX -1 /* use maximum range of VPI/VCI */ 163 164struct atm_cirange { 165 signed char vpi_bits; /* 1..8, ATM_CI_MAX (-1) for maximum */ 166 signed char vci_bits; /* 1..16, ATM_CI_MAX (-1) for maximum */ 167}; 168 169/* for ATM_SETSC; actually taken from the ATM_VF number space */ 170 171#define ATM_SC_RX 1024 /* enable RX single-copy */ 172#define ATM_SC_TX 2048 /* enable TX single-copy */ 173 174#define ATM_BACKLOG_DEFAULT 32 /* if we get more, we're likely to time out 175 anyway */ 176 177/* MF: change_qos (Modify) flags */ 178 179#define ATM_MF_IMMED 1 /* Block until change is effective */ 180#define ATM_MF_INC_RSV 2 /* Change reservation on increase */ 181#define ATM_MF_INC_SHP 4 /* Change shaping on increase */ 182#define ATM_MF_DEC_RSV 8 /* Change reservation on decrease */ 183#define ATM_MF_DEC_SHP 16 /* Change shaping on decrease */ 184#define ATM_MF_BWD 32 /* Set the backward direction parameters */ 185 186#define ATM_MF_SET (ATM_MF_INC_RSV | ATM_MF_INC_SHP | ATM_MF_DEC_RSV | \ 187 ATM_MF_DEC_SHP | ATM_MF_BWD) 188 189/* 190 * ATM_VS_* are used to express VC state in a human-friendly way. 191 */ 192 193#define ATM_VS_IDLE 0 /* VC is not used */ 194#define ATM_VS_CONNECTED 1 /* VC is connected */ 195#define ATM_VS_CLOSING 2 /* VC is closing */ 196#define ATM_VS_LISTEN 3 /* VC is listening for incoming setups */ 197#define ATM_VS_INUSE 4 /* VC is in use (registered with atmsigd) */ 198#define ATM_VS_BOUND 5 /* VC is bound */ 199 200#define ATM_VS2TXT_MAP \ 201 "IDLE", "CONNECTED", "CLOSING", "LISTEN", "INUSE", "BOUND" 202 203#define ATM_VF2TXT_MAP \ 204 "ADDR", "READY", "PARTIAL", "REGIS", \ 205 "RELEASED", "HASQOS", "LISTEN", "META", \ 206 "256", "512", "1024", "2048", \ 207 "SESSION", "HASSAP", "BOUND", "CLOSE" 208 209 210#ifdef __KERNEL__ 211 212#include <linux/device.h> 213#include <linux/wait.h> /* wait_queue_head_t */ 214#include <linux/time.h> /* struct timeval */ 215#include <linux/net.h> 216#include <linux/skbuff.h> /* struct sk_buff */ 217#include <linux/uio.h> 218#include <net/sock.h> 219#include <asm/atomic.h> 220 221#ifdef CONFIG_PROC_FS 222#include <linux/proc_fs.h> 223 224extern struct proc_dir_entry *atm_proc_root; 225#endif 226 227 228struct k_atm_aal_stats { 229#define __HANDLE_ITEM(i) atomic_t i 230 __AAL_STAT_ITEMS 231#undef __HANDLE_ITEM 232}; 233 234 235struct k_atm_dev_stats { 236 struct k_atm_aal_stats aal0; 237 struct k_atm_aal_stats aal34; 238 struct k_atm_aal_stats aal5; 239}; 240 241 242enum { 243 ATM_VF_ADDR, /* Address is in use. Set by anybody, cleared 244 by device driver. */ 245 ATM_VF_READY, /* VC is ready to transfer data. Set by device 246 driver, cleared by anybody. */ 247 ATM_VF_PARTIAL, /* resources are bound to PVC (partial PVC 248 setup), controlled by socket layer */ 249 ATM_VF_REGIS, /* registered with demon, controlled by SVC 250 socket layer */ 251 ATM_VF_BOUND, /* local SAP is set, controlled by SVC socket 252 layer */ 253 ATM_VF_RELEASED, /* demon has indicated/requested release, 254 controlled by SVC socket layer */ 255 ATM_VF_HASQOS, /* QOS parameters have been set */ 256 ATM_VF_LISTEN, /* socket is used for listening */ 257 ATM_VF_META, /* SVC socket isn't used for normal data 258 traffic and doesn't depend on signaling 259 to be available */ 260 ATM_VF_SESSION, /* VCC is p2mp session control descriptor */ 261 ATM_VF_HASSAP, /* SAP has been set */ 262 ATM_VF_CLOSE, /* asynchronous close - treat like VF_RELEASED*/ 263 ATM_VF_WAITING, /* waiting for reply from sigd */ 264 ATM_VF_IS_CLIP, /* in use by CLIP protocol */ 265}; 266 267 268#define ATM_VF2VS(flags) \ 269 (test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \ 270 test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \ 271 test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \ 272 test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \ 273 test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE) 274 275 276enum { 277 ATM_DF_REMOVED, /* device was removed from atm_devs list */ 278}; 279 280 281#define ATM_PHY_SIG_LOST 0 /* no carrier/light */ 282#define ATM_PHY_SIG_UNKNOWN 1 /* carrier/light status is unknown */ 283#define ATM_PHY_SIG_FOUND 2 /* carrier/light okay */ 284 285#define ATM_ATMOPT_CLP 1 /* set CLP bit */ 286 287struct atm_vcc { 288 /* struct sock has to be the first member of atm_vcc */ 289 struct sock sk; 290 unsigned long flags; /* VCC flags (ATM_VF_*) */ 291 short vpi; /* VPI and VCI (types must be equal */ 292 /* with sockaddr) */ 293 int vci; 294 unsigned long aal_options; /* AAL layer options */ 295 unsigned long atm_options; /* ATM layer options */ 296 struct atm_dev *dev; /* device back pointer */ 297 struct atm_qos qos; /* QOS */ 298 struct atm_sap sap; /* SAP */ 299 void (*push)(struct atm_vcc *vcc,struct sk_buff *skb); 300 void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */ 301 int (*push_oam)(struct atm_vcc *vcc,void *cell); 302 int (*send)(struct atm_vcc *vcc,struct sk_buff *skb); 303 void *dev_data; /* per-device data */ 304 void *proto_data; /* per-protocol data */ 305 struct k_atm_aal_stats *stats; /* pointer to AAL stats group */ 306 /* SVC part --- may move later ------------------------------------- */ 307 short itf; /* interface number */ 308 struct sockaddr_atmsvc local; 309 struct sockaddr_atmsvc remote; 310 /* Multipoint part ------------------------------------------------- */ 311 struct atm_vcc *session; /* session VCC descriptor */ 312 /* Other stuff ----------------------------------------------------- */ 313 void *user_back; /* user backlink - not touched by */ 314 /* native ATM stack. Currently used */ 315 /* by CLIP and sch_atm. */ 316}; 317 318static inline struct atm_vcc *atm_sk(struct sock *sk) 319{ 320 return (struct atm_vcc *)sk; 321} 322 323static inline struct atm_vcc *ATM_SD(struct socket *sock) 324{ 325 return atm_sk(sock->sk); 326} 327 328static inline struct sock *sk_atm(struct atm_vcc *vcc) 329{ 330 return (struct sock *)vcc; 331} 332 333struct atm_dev_addr { 334 struct sockaddr_atmsvc addr; /* ATM address */ 335 struct list_head entry; /* next address */ 336}; 337 338enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS }; 339 340struct atm_dev { 341 const struct atmdev_ops *ops; /* device operations; NULL if unused */ 342 const struct atmphy_ops *phy; /* PHY operations, may be undefined */ 343 /* (NULL) */ 344 const char *type; /* device type name */ 345 int number; /* device index */ 346 void *dev_data; /* per-device data */ 347 void *phy_data; /* private PHY date */ 348 unsigned long flags; /* device flags (ATM_DF_*) */ 349 struct list_head local; /* local ATM addresses */ 350 struct list_head lecs; /* LECS ATM addresses learned via ILMI */ 351 unsigned char esi[ESI_LEN]; /* ESI ("MAC" addr) */ 352 struct atm_cirange ci_range; /* VPI/VCI range */ 353 struct k_atm_dev_stats stats; /* statistics */ 354 char signal; /* signal status (ATM_PHY_SIG_*) */ 355 int link_rate; /* link rate (default: OC3) */ 356 atomic_t refcnt; /* reference count */ 357 spinlock_t lock; /* protect internal members */ 358#ifdef CONFIG_PROC_FS 359 struct proc_dir_entry *proc_entry; /* proc entry */ 360 char *proc_name; /* proc entry name */ 361#endif 362 struct class_device class_dev; /* sysfs class device */ 363 struct list_head dev_list; /* linkage */ 364}; 365 366 367/* OF: send_Oam Flags */ 368 369#define ATM_OF_IMMED 1 /* Attempt immediate delivery */ 370#define ATM_OF_INRATE 2 /* Attempt in-rate delivery */ 371 372 373/* 374 * ioctl, getsockopt, and setsockopt are optional and can be set to NULL. 375 */ 376 377struct atmdev_ops { /* only send is required */ 378 void (*dev_close)(struct atm_dev *dev); 379 int (*open)(struct atm_vcc *vcc); 380 void (*close)(struct atm_vcc *vcc); 381 int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg); 382 int (*getsockopt)(struct atm_vcc *vcc,int level,int optname, 383 void __user *optval,int optlen); 384 int (*setsockopt)(struct atm_vcc *vcc,int level,int optname, 385 void __user *optval,int optlen); 386 int (*send)(struct atm_vcc *vcc,struct sk_buff *skb); 387 int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags); 388 void (*phy_put)(struct atm_dev *dev,unsigned char value, 389 unsigned long addr); 390 unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr); 391 int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags); 392 int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page); 393 struct module *owner; 394}; 395 396struct atmphy_ops { 397 int (*start)(struct atm_dev *dev); 398 int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg); 399 void (*interrupt)(struct atm_dev *dev); 400 int (*stop)(struct atm_dev *dev); 401}; 402 403struct atm_skb_data { 404 struct atm_vcc *vcc; /* ATM VCC */ 405 unsigned long atm_options; /* ATM layer options */ 406}; 407 408#define VCC_HTABLE_SIZE 32 409 410extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE]; 411extern rwlock_t vcc_sklist_lock; 412 413#define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb)) 414 415struct atm_dev *atm_dev_register(const char *type,const struct atmdev_ops *ops, 416 int number,unsigned long *flags); /* number == -1: pick first available */ 417struct atm_dev *atm_dev_lookup(int number); 418void atm_dev_deregister(struct atm_dev *dev); 419void vcc_insert_socket(struct sock *sk); 420 421 422/* 423 * This is approximately the algorithm used by alloc_skb. 424 * 425 */ 426 427static inline int atm_guess_pdu2truesize(int size) 428{ 429 return (SKB_DATA_ALIGN(size) + sizeof(struct skb_shared_info)); 430} 431 432 433static inline void atm_force_charge(struct atm_vcc *vcc,int truesize) 434{ 435 atomic_add(truesize, &sk_atm(vcc)->sk_rmem_alloc); 436} 437 438 439static inline void atm_return(struct atm_vcc *vcc,int truesize) 440{ 441 atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc); 442} 443 444 445static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size) 446{ 447 return (size + atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) < 448 sk_atm(vcc)->sk_sndbuf; 449} 450 451 452static inline void atm_dev_hold(struct atm_dev *dev) 453{ 454 atomic_inc(&dev->refcnt); 455} 456 457 458static inline void atm_dev_put(struct atm_dev *dev) 459{ 460 if (atomic_dec_and_test(&dev->refcnt)) { 461 BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags)); 462 if (dev->ops->dev_close) 463 dev->ops->dev_close(dev); 464 class_device_put(&dev->class_dev); 465 } 466} 467 468 469int atm_charge(struct atm_vcc *vcc,int truesize); 470struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size, 471 gfp_t gfp_flags); 472int atm_pcr_goal(const struct atm_trafprm *tp); 473 474void vcc_release_async(struct atm_vcc *vcc, int reply); 475 476struct atm_ioctl { 477 struct module *owner; 478 /* A module reference is kept if appropriate over this call. 479 * Return -ENOIOCTLCMD if you don't handle it. */ 480 int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg); 481 struct list_head list; 482}; 483 484/** 485 * register_atm_ioctl - register handler for ioctl operations 486 * 487 * Special (non-device) handlers of ioctl's should 488 * register here. If you're a normal device, you should 489 * set .ioctl in your atmdev_ops instead. 490 */ 491void register_atm_ioctl(struct atm_ioctl *); 492 493/** 494 * deregister_atm_ioctl - remove the ioctl handler 495 */ 496void deregister_atm_ioctl(struct atm_ioctl *); 497 498#endif /* __KERNEL__ */ 499 500#endif 501