Quelle atmdev.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
/* atmdev.h - ATM device driver declarations and various related items */
#ifndef LINUX_ATMDEV_H
#define LINUX_ATMDEV_H

#include <linux/wait.h> /* wait_queue_head_t */
#include <linux/time.h> /* struct timeval */
#include <linux/net.h>
#include <linux/bug.h>
#include <linux/skbuff.h> /* struct sk_buff */
#include <linux/uio.h>
#include <net/sock.h>
#include <linux/atomic.h>
#include <linux/refcount.h>
#include <uapi/linux/atmdev.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;
};

struct device;

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 (*release_cb)(struct atm_vcc *vcc); /* release_sock callback */
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 */
struct module *owner;  /* owner of ->push function */
/* 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 data */
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) */
refcount_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 */

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 (*pre_send)(struct atm_vcc *vcc, struct sk_buff *skb);
int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
int (*send_bh)(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 */
unsigned int acct_truesize;  /* truesize accounted to vcc */
} __packed;

#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, struct device *parent,
     const struct atmdev_ops *ops,
     int number, /* -1 == pick first available */
     unsigned long *flags);
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);

void atm_dev_release_vccs(struct atm_dev *dev);

static inline void atm_account_tx(struct atm_vcc *vcc, struct sk_buff *skb)
{
/*
* Because ATM skbs may not belong to a sock (and we don't
* necessarily want to), skb->truesize may be adjusted,
* escaping the hack in pskb_expand_head() which avoids
* doing so for some cases. So stash the value of truesize
* at the time we accounted it, and atm_pop_raw() can use
* that value later, in case it changes.
*/
refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
ATM_SKB(skb)->acct_truesize = skb->truesize;
ATM_SKB(skb)->atm_options = vcc->atm_options;
}

static inline void atm_return_tx(struct atm_vcc *vcc, struct sk_buff *skb)
{
WARN_ON_ONCE(refcount_sub_and_test(ATM_SKB(skb)->acct_truesize,
        &sk_atm(vcc)->sk_wmem_alloc));
}

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 + refcount_read(&sk_atm(vcc)->sk_wmem_alloc)) <
        sk_atm(vcc)->sk_sndbuf;
}

static inline void atm_dev_hold(struct atm_dev *dev)
{
refcount_inc(&dev->refcnt);
}

static inline void atm_dev_put(struct atm_dev *dev)
{
if (refcount_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

quality95%

¤ Dauer der Verarbeitung: 0.13 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.