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kernel-ark/include/linux/atmdev.h
Karl Hiramoto 7313bb8f3d atm: propagate signal changes via notifier 
Add notifier chain for changes in atm_dev.

Clients like br2684 will call register_atmdevice_notifier() to be notified of
changes. Drivers will call atm_dev_signal_change() to notify clients like
br2684 of the change.

On DSL and ATM devices it's usefull to have a know if you have a carrier
signal. netdevice LOWER_UP changes can be propagated to userspace via netlink
monitor.

Signed-off-by: Karl Hiramoto <karl@hiramoto.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-07-09 00:09:20 -07:00

533 lines
17 KiB
C
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/* atmdev.h - ATM device driver declarations and various related items */
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
#ifndef LINUX_ATMDEV_H
#define LINUX_ATMDEV_H
#include <linux/atmapi.h>
#include <linux/atm.h>
#include <linux/atmioc.h>
#define ESI_LEN 6
#define ATM_OC3_PCR (155520000/270*260/8/53)
/* OC3 link rate: 155520000 bps
SONET overhead: /270*260 (9 section, 1 path)
bits per cell: /8/53
max cell rate: 353207.547 cells/sec */
#define ATM_25_PCR ((25600000/8-8000)/54)
/* 25 Mbps ATM cell rate (59111) */
#define ATM_OC12_PCR (622080000/1080*1040/8/53)
/* OC12 link rate: 622080000 bps
SONET overhead: /1080*1040
bits per cell: /8/53
max cell rate: 1412830.188 cells/sec */
#define ATM_DS3_PCR (8000*12)
/* DS3: 12 cells in a 125 usec time slot */
#define __AAL_STAT_ITEMS \
__HANDLE_ITEM(tx); /* TX okay */ \
__HANDLE_ITEM(tx_err); /* TX errors */ \
__HANDLE_ITEM(rx); /* RX okay */ \
__HANDLE_ITEM(rx_err); /* RX errors */ \
__HANDLE_ITEM(rx_drop); /* RX out of memory */
struct atm_aal_stats {
#define __HANDLE_ITEM(i) int i
__AAL_STAT_ITEMS
#undef __HANDLE_ITEM
};
struct atm_dev_stats {
struct atm_aal_stats aal0;
struct atm_aal_stats aal34;
struct atm_aal_stats aal5;
} __ATM_API_ALIGN;
#define ATM_GETLINKRATE _IOW('a',ATMIOC_ITF+1,struct atmif_sioc)
/* get link rate */
#define ATM_GETNAMES _IOW('a',ATMIOC_ITF+3,struct atm_iobuf)
/* get interface names (numbers) */
#define ATM_GETTYPE _IOW('a',ATMIOC_ITF+4,struct atmif_sioc)
/* get interface type name */
#define ATM_GETESI _IOW('a',ATMIOC_ITF+5,struct atmif_sioc)
/* get interface ESI */
#define ATM_GETADDR _IOW('a',ATMIOC_ITF+6,struct atmif_sioc)
/* get itf's local ATM addr. list */
#define ATM_RSTADDR _IOW('a',ATMIOC_ITF+7,struct atmif_sioc)
/* reset itf's ATM address list */
#define ATM_ADDADDR _IOW('a',ATMIOC_ITF+8,struct atmif_sioc)
/* add a local ATM address */
#define ATM_DELADDR _IOW('a',ATMIOC_ITF+9,struct atmif_sioc)
/* remove a local ATM address */
#define ATM_GETCIRANGE _IOW('a',ATMIOC_ITF+10,struct atmif_sioc)
/* get connection identifier range */
#define ATM_SETCIRANGE _IOW('a',ATMIOC_ITF+11,struct atmif_sioc)
/* set connection identifier range */
#define ATM_SETESI _IOW('a',ATMIOC_ITF+12,struct atmif_sioc)
/* set interface ESI */
#define ATM_SETESIF _IOW('a',ATMIOC_ITF+13,struct atmif_sioc)
/* force interface ESI */
#define ATM_ADDLECSADDR _IOW('a', ATMIOC_ITF+14, struct atmif_sioc)
/* register a LECS address */
#define ATM_DELLECSADDR _IOW('a', ATMIOC_ITF+15, struct atmif_sioc)
/* unregister a LECS address */
#define ATM_GETLECSADDR _IOW('a', ATMIOC_ITF+16, struct atmif_sioc)
/* retrieve LECS address(es) */
#define ATM_GETSTAT _IOW('a',ATMIOC_SARCOM+0,struct atmif_sioc)
/* get AAL layer statistics */
#define ATM_GETSTATZ _IOW('a',ATMIOC_SARCOM+1,struct atmif_sioc)
/* get AAL layer statistics and zero */
#define ATM_GETLOOP _IOW('a',ATMIOC_SARCOM+2,struct atmif_sioc)
/* get loopback mode */
#define ATM_SETLOOP _IOW('a',ATMIOC_SARCOM+3,struct atmif_sioc)
/* set loopback mode */
#define ATM_QUERYLOOP _IOW('a',ATMIOC_SARCOM+4,struct atmif_sioc)
/* query supported loopback modes */
#define ATM_SETSC _IOW('a',ATMIOC_SPECIAL+1,int)
/* enable or disable single-copy */
#define ATM_SETBACKEND _IOW('a',ATMIOC_SPECIAL+2,atm_backend_t)
/* set backend handler */
#define ATM_NEWBACKENDIF _IOW('a',ATMIOC_SPECIAL+3,atm_backend_t)
/* use backend to make new if */
#define ATM_ADDPARTY _IOW('a', ATMIOC_SPECIAL+4,struct atm_iobuf)
/* add party to p2mp call */
#ifdef CONFIG_COMPAT
/* It actually takes struct sockaddr_atmsvc, not struct atm_iobuf */
#define COMPAT_ATM_ADDPARTY _IOW('a', ATMIOC_SPECIAL+4,struct compat_atm_iobuf)
#endif
#define ATM_DROPPARTY _IOW('a', ATMIOC_SPECIAL+5,int)
/* drop party from p2mp call */
/*
* These are backend handkers that can be set via the ATM_SETBACKEND call
* above. In the future we may support dynamic loading of these - for now,
* they're just being used to share the ATMIOC_BACKEND ioctls
*/
#define ATM_BACKEND_RAW 0
#define ATM_BACKEND_PPP 1 /* PPPoATM - RFC2364 */
#define ATM_BACKEND_BR2684 2 /* Bridged RFC1483/2684 */
/* for ATM_GETTYPE */
#define ATM_ITFTYP_LEN 8 /* maximum length of interface type name */
/*
* Loopback modes for ATM_{PHY,SAR}_{GET,SET}LOOP
*/
/* Point of loopback CPU-->SAR-->PHY-->line--> ... */
#define __ATM_LM_NONE 0 /* no loop back ^ ^ ^ ^ */
#define __ATM_LM_AAL 1 /* loop back PDUs --' | | | */
#define __ATM_LM_ATM 2 /* loop back ATM cells ---' | | */
/* RESERVED 4 loop back on PHY side ---' */
#define __ATM_LM_PHY 8 /* loop back bits (digital) ----' | */
#define __ATM_LM_ANALOG 16 /* loop back the analog signal --------' */
/* Direction of loopback */
#define __ATM_LM_MKLOC(n) ((n)) /* Local (i.e. loop TX to RX) */
#define __ATM_LM_MKRMT(n) ((n) << 8) /* Remote (i.e. loop RX to TX) */
#define __ATM_LM_XTLOC(n) ((n) & 0xff)
#define __ATM_LM_XTRMT(n) (((n) >> 8) & 0xff)
#define ATM_LM_NONE 0 /* no loopback */
#define ATM_LM_LOC_AAL __ATM_LM_MKLOC(__ATM_LM_AAL)
#define ATM_LM_LOC_ATM __ATM_LM_MKLOC(__ATM_LM_ATM)
#define ATM_LM_LOC_PHY __ATM_LM_MKLOC(__ATM_LM_PHY)
#define ATM_LM_LOC_ANALOG __ATM_LM_MKLOC(__ATM_LM_ANALOG)
#define ATM_LM_RMT_AAL __ATM_LM_MKRMT(__ATM_LM_AAL)
#define ATM_LM_RMT_ATM __ATM_LM_MKRMT(__ATM_LM_ATM)
#define ATM_LM_RMT_PHY __ATM_LM_MKRMT(__ATM_LM_PHY)
#define ATM_LM_RMT_ANALOG __ATM_LM_MKRMT(__ATM_LM_ANALOG)
/*
* Note: ATM_LM_LOC_* and ATM_LM_RMT_* can be combined, provided that
* __ATM_LM_XTLOC(x) <= __ATM_LM_XTRMT(x)
*/
struct atm_iobuf {
int length;
void __user *buffer;
};
/* for ATM_GETCIRANGE / ATM_SETCIRANGE */
#define ATM_CI_MAX -1 /* use maximum range of VPI/VCI */
struct atm_cirange {
signed char vpi_bits; /* 1..8, ATM_CI_MAX (-1) for maximum */
signed char vci_bits; /* 1..16, ATM_CI_MAX (-1) for maximum */
};
/* for ATM_SETSC; actually taken from the ATM_VF number space */
#define ATM_SC_RX 1024 /* enable RX single-copy */
#define ATM_SC_TX 2048 /* enable TX single-copy */
#define ATM_BACKLOG_DEFAULT 32 /* if we get more, we're likely to time out
anyway */
/* MF: change_qos (Modify) flags */
#define ATM_MF_IMMED 1 /* Block until change is effective */
#define ATM_MF_INC_RSV 2 /* Change reservation on increase */
#define ATM_MF_INC_SHP 4 /* Change shaping on increase */
#define ATM_MF_DEC_RSV 8 /* Change reservation on decrease */
#define ATM_MF_DEC_SHP 16 /* Change shaping on decrease */
#define ATM_MF_BWD 32 /* Set the backward direction parameters */
#define ATM_MF_SET (ATM_MF_INC_RSV | ATM_MF_INC_SHP | ATM_MF_DEC_RSV | \
ATM_MF_DEC_SHP | ATM_MF_BWD)
/*
* ATM_VS_* are used to express VC state in a human-friendly way.
*/
#define ATM_VS_IDLE 0 /* VC is not used */
#define ATM_VS_CONNECTED 1 /* VC is connected */
#define ATM_VS_CLOSING 2 /* VC is closing */
#define ATM_VS_LISTEN 3 /* VC is listening for incoming setups */
#define ATM_VS_INUSE 4 /* VC is in use (registered with atmsigd) */
#define ATM_VS_BOUND 5 /* VC is bound */
#define ATM_VS2TXT_MAP \
"IDLE", "CONNECTED", "CLOSING", "LISTEN", "INUSE", "BOUND"
#define ATM_VF2TXT_MAP \
"ADDR", "READY", "PARTIAL", "REGIS", \
"RELEASED", "HASQOS", "LISTEN", "META", \
"256", "512", "1024", "2048", \
"SESSION", "HASSAP", "BOUND", "CLOSE"
#ifdef __KERNEL__
#include <linux/device.h>
#include <linux/wait.h> /* wait_queue_head_t */
#include <linux/time.h> /* struct timeval */
#include <linux/net.h>
#include <linux/skbuff.h> /* struct sk_buff */
#include <linux/uio.h>
#include <net/sock.h>
#include <asm/atomic.h>
#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
extern struct proc_dir_entry *atm_proc_root;
#endif
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
struct compat_atm_iobuf {
int length;
compat_uptr_t buffer;
};
#endif
struct k_atm_aal_stats {
#define __HANDLE_ITEM(i) atomic_t i
__AAL_STAT_ITEMS
#undef __HANDLE_ITEM
};
struct k_atm_dev_stats {
struct k_atm_aal_stats aal0;
struct k_atm_aal_stats aal34;
struct k_atm_aal_stats aal5;
};
enum {
ATM_VF_ADDR, /* Address is in use. Set by anybody, cleared
by device driver. */
ATM_VF_READY, /* VC is ready to transfer data. Set by device
driver, cleared by anybody. */
ATM_VF_PARTIAL, /* resources are bound to PVC (partial PVC
setup), controlled by socket layer */
ATM_VF_REGIS, /* registered with demon, controlled by SVC
socket layer */
ATM_VF_BOUND, /* local SAP is set, controlled by SVC socket
layer */
ATM_VF_RELEASED, /* demon has indicated/requested release,
controlled by SVC socket layer */
ATM_VF_HASQOS, /* QOS parameters have been set */
ATM_VF_LISTEN, /* socket is used for listening */
ATM_VF_META, /* SVC socket isn't used for normal data
traffic and doesn't depend on signaling
to be available */
ATM_VF_SESSION, /* VCC is p2mp session control descriptor */
ATM_VF_HASSAP, /* SAP has been set */
ATM_VF_CLOSE, /* asynchronous close - treat like VF_RELEASED*/
ATM_VF_WAITING, /* waiting for reply from sigd */
ATM_VF_IS_CLIP, /* in use by CLIP protocol */
};
#define ATM_VF2VS(flags) \
(test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \
test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \
test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \
test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \
test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE)
enum {
ATM_DF_REMOVED, /* device was removed from atm_devs list */
};
#define ATM_PHY_SIG_LOST 0 /* no carrier/light */
#define ATM_PHY_SIG_UNKNOWN 1 /* carrier/light status is unknown */
#define ATM_PHY_SIG_FOUND 2 /* carrier/light okay */
#define ATM_ATMOPT_CLP 1 /* set CLP bit */
struct atm_vcc {
/* struct sock has to be the first member of atm_vcc */
struct sock sk;
unsigned long flags; /* VCC flags (ATM_VF_*) */
short vpi; /* VPI and VCI (types must be equal */
/* with sockaddr) */
int vci;
unsigned long aal_options; /* AAL layer options */
unsigned long atm_options; /* ATM layer options */
struct atm_dev *dev; /* device back pointer */
struct atm_qos qos; /* QOS */
struct atm_sap sap; /* SAP */
void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
int (*push_oam)(struct atm_vcc *vcc,void *cell);
int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
void *dev_data; /* per-device data */
void *proto_data; /* per-protocol data */
struct k_atm_aal_stats *stats; /* pointer to AAL stats group */
/* SVC part --- may move later ------------------------------------- */
short itf; /* interface number */
struct sockaddr_atmsvc local;
struct sockaddr_atmsvc remote;
/* Multipoint part ------------------------------------------------- */
struct atm_vcc *session; /* session VCC descriptor */
/* Other stuff ----------------------------------------------------- */
void *user_back; /* user backlink - not touched by */
/* native ATM stack. Currently used */
/* by CLIP and sch_atm. */
};
static inline struct atm_vcc *atm_sk(struct sock *sk)
{
return (struct atm_vcc *)sk;
}
static inline struct atm_vcc *ATM_SD(struct socket *sock)
{
return atm_sk(sock->sk);
}
static inline struct sock *sk_atm(struct atm_vcc *vcc)
{
return (struct sock *)vcc;
}
struct atm_dev_addr {
struct sockaddr_atmsvc addr; /* ATM address */
struct list_head entry; /* next address */
};
enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };
struct atm_dev {
const struct atmdev_ops *ops; /* device operations; NULL if unused */
const struct atmphy_ops *phy; /* PHY operations, may be undefined */
/* (NULL) */
const char *type; /* device type name */
int number; /* device index */
void *dev_data; /* per-device data */
void *phy_data; /* private PHY date */
unsigned long flags; /* device flags (ATM_DF_*) */
struct list_head local; /* local ATM addresses */
struct list_head lecs; /* LECS ATM addresses learned via ILMI */
unsigned char esi[ESI_LEN]; /* ESI ("MAC" addr) */
struct atm_cirange ci_range; /* VPI/VCI range */
struct k_atm_dev_stats stats; /* statistics */
char signal; /* signal status (ATM_PHY_SIG_*) */
int link_rate; /* link rate (default: OC3) */
atomic_t refcnt; /* reference count */
spinlock_t lock; /* protect internal members */
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *proc_entry; /* proc entry */
char *proc_name; /* proc entry name */
#endif
struct device class_dev; /* sysfs device */
struct list_head dev_list; /* linkage */
};
/* OF: send_Oam Flags */
#define ATM_OF_IMMED 1 /* Attempt immediate delivery */
#define ATM_OF_INRATE 2 /* Attempt in-rate delivery */
/*
* ioctl, getsockopt, and setsockopt are optional and can be set to NULL.
*/
struct atmdev_ops { /* only send is required */
void (*dev_close)(struct atm_dev *dev);
int (*open)(struct atm_vcc *vcc);
void (*close)(struct atm_vcc *vcc);
int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
#ifdef CONFIG_COMPAT
int (*compat_ioctl)(struct atm_dev *dev,unsigned int cmd,
void __user *arg);
#endif
int (*getsockopt)(struct atm_vcc *vcc,int level,int optname,
void __user *optval,int optlen);
int (*setsockopt)(struct atm_vcc *vcc,int level,int optname,
void __user *optval,unsigned int optlen);
int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
void (*phy_put)(struct atm_dev *dev,unsigned char value,
unsigned long addr);
unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr);
int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags);
int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page);
struct module *owner;
};
struct atmphy_ops {
int (*start)(struct atm_dev *dev);
int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
void (*interrupt)(struct atm_dev *dev);
int (*stop)(struct atm_dev *dev);
};
struct atm_skb_data {
struct atm_vcc *vcc; /* ATM VCC */
unsigned long atm_options; /* ATM layer options */
};
#define VCC_HTABLE_SIZE 32
extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
extern rwlock_t vcc_sklist_lock;
#define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
struct atm_dev *atm_dev_register(const char *type,const struct atmdev_ops *ops,
int number,unsigned long *flags); /* number == -1: pick first available */
struct atm_dev *atm_dev_lookup(int number);
void atm_dev_deregister(struct atm_dev *dev);
/* atm_dev_signal_change
*
* Propagate lower layer signal change in atm_dev->signal to netdevice.
* The event will be sent via a notifier call chain.
*/
void atm_dev_signal_change(struct atm_dev *dev, char signal);
void vcc_insert_socket(struct sock *sk);
/*
* This is approximately the algorithm used by alloc_skb.
*
*/
static inline int atm_guess_pdu2truesize(int size)
{
return (SKB_DATA_ALIGN(size) + sizeof(struct skb_shared_info));
}
static inline void atm_force_charge(struct atm_vcc *vcc,int truesize)
{
atomic_add(truesize, &sk_atm(vcc)->sk_rmem_alloc);
}
static inline void atm_return(struct atm_vcc *vcc,int truesize)
{
atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc);
}
static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size)
{
return (size + atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) <
sk_atm(vcc)->sk_sndbuf;
}
static inline void atm_dev_hold(struct atm_dev *dev)
{
atomic_inc(&dev->refcnt);
}
static inline void atm_dev_put(struct atm_dev *dev)
{
if (atomic_dec_and_test(&dev->refcnt)) {
BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
if (dev->ops->dev_close)
dev->ops->dev_close(dev);
put_device(&dev->class_dev);
}
}
int atm_charge(struct atm_vcc *vcc,int truesize);
struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
gfp_t gfp_flags);
int atm_pcr_goal(const struct atm_trafprm *tp);
void vcc_release_async(struct atm_vcc *vcc, int reply);
struct atm_ioctl {
struct module *owner;
/* A module reference is kept if appropriate over this call.
* Return -ENOIOCTLCMD if you don't handle it. */
int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg);
struct list_head list;
};
/**
* register_atm_ioctl - register handler for ioctl operations
*
* Special (non-device) handlers of ioctl's should
* register here. If you're a normal device, you should
* set .ioctl in your atmdev_ops instead.
*/
void register_atm_ioctl(struct atm_ioctl *);
/**
* deregister_atm_ioctl - remove the ioctl handler
*/
void deregister_atm_ioctl(struct atm_ioctl *);
/* register_atmdevice_notifier - register atm_dev notify events
*
* Clients like br2684 will register notify events
* Currently we notify of signal found/lost
*/
int register_atmdevice_notifier(struct notifier_block *nb);
void unregister_atmdevice_notifier(struct notifier_block *nb);
#endif /* __KERNEL__ */
#endif
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