318 lines
9.5 KiB
C
318 lines
9.5 KiB
C
/* atmdev.h - ATM device driver declarations and various related items */
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#ifndef LINUX_ATMDEV_H
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#define LINUX_ATMDEV_H
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#include <linux/wait.h> /* wait_queue_head_t */
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#include <linux/time.h> /* struct timeval */
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#include <linux/net.h>
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#include <linux/bug.h>
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#include <linux/skbuff.h> /* struct sk_buff */
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#include <linux/uio.h>
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#include <net/sock.h>
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#include <linux/atomic.h>
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#include <uapi/linux/atmdev.h>
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#ifdef CONFIG_PROC_FS
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#include <linux/proc_fs.h>
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extern struct proc_dir_entry *atm_proc_root;
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#endif
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#ifdef CONFIG_COMPAT
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#include <linux/compat.h>
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struct compat_atm_iobuf {
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int length;
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compat_uptr_t buffer;
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};
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#endif
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struct k_atm_aal_stats {
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#define __HANDLE_ITEM(i) atomic_t i
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__AAL_STAT_ITEMS
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#undef __HANDLE_ITEM
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};
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struct k_atm_dev_stats {
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struct k_atm_aal_stats aal0;
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struct k_atm_aal_stats aal34;
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struct k_atm_aal_stats aal5;
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};
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struct device;
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enum {
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ATM_VF_ADDR, /* Address is in use. Set by anybody, cleared
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by device driver. */
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ATM_VF_READY, /* VC is ready to transfer data. Set by device
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driver, cleared by anybody. */
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ATM_VF_PARTIAL, /* resources are bound to PVC (partial PVC
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setup), controlled by socket layer */
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ATM_VF_REGIS, /* registered with demon, controlled by SVC
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socket layer */
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ATM_VF_BOUND, /* local SAP is set, controlled by SVC socket
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layer */
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ATM_VF_RELEASED, /* demon has indicated/requested release,
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controlled by SVC socket layer */
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ATM_VF_HASQOS, /* QOS parameters have been set */
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ATM_VF_LISTEN, /* socket is used for listening */
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ATM_VF_META, /* SVC socket isn't used for normal data
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traffic and doesn't depend on signaling
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to be available */
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ATM_VF_SESSION, /* VCC is p2mp session control descriptor */
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ATM_VF_HASSAP, /* SAP has been set */
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ATM_VF_CLOSE, /* asynchronous close - treat like VF_RELEASED*/
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ATM_VF_WAITING, /* waiting for reply from sigd */
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ATM_VF_IS_CLIP, /* in use by CLIP protocol */
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};
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#define ATM_VF2VS(flags) \
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(test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \
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test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \
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test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \
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test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \
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test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE)
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enum {
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ATM_DF_REMOVED, /* device was removed from atm_devs list */
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};
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#define ATM_PHY_SIG_LOST 0 /* no carrier/light */
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#define ATM_PHY_SIG_UNKNOWN 1 /* carrier/light status is unknown */
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#define ATM_PHY_SIG_FOUND 2 /* carrier/light okay */
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#define ATM_ATMOPT_CLP 1 /* set CLP bit */
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struct atm_vcc {
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/* struct sock has to be the first member of atm_vcc */
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struct sock sk;
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unsigned long flags; /* VCC flags (ATM_VF_*) */
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short vpi; /* VPI and VCI (types must be equal */
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/* with sockaddr) */
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int vci;
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unsigned long aal_options; /* AAL layer options */
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unsigned long atm_options; /* ATM layer options */
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struct atm_dev *dev; /* device back pointer */
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struct atm_qos qos; /* QOS */
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struct atm_sap sap; /* SAP */
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void (*release_cb)(struct atm_vcc *vcc); /* release_sock callback */
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void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
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void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
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int (*push_oam)(struct atm_vcc *vcc,void *cell);
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int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
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void *dev_data; /* per-device data */
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void *proto_data; /* per-protocol data */
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struct k_atm_aal_stats *stats; /* pointer to AAL stats group */
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struct module *owner; /* owner of ->push function */
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/* SVC part --- may move later ------------------------------------- */
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short itf; /* interface number */
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struct sockaddr_atmsvc local;
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struct sockaddr_atmsvc remote;
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/* Multipoint part ------------------------------------------------- */
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struct atm_vcc *session; /* session VCC descriptor */
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/* Other stuff ----------------------------------------------------- */
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void *user_back; /* user backlink - not touched by */
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/* native ATM stack. Currently used */
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/* by CLIP and sch_atm. */
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};
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static inline struct atm_vcc *atm_sk(struct sock *sk)
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{
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return (struct atm_vcc *)sk;
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}
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static inline struct atm_vcc *ATM_SD(struct socket *sock)
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{
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return atm_sk(sock->sk);
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}
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static inline struct sock *sk_atm(struct atm_vcc *vcc)
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{
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return (struct sock *)vcc;
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}
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struct atm_dev_addr {
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struct sockaddr_atmsvc addr; /* ATM address */
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struct list_head entry; /* next address */
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};
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enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };
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struct atm_dev {
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const struct atmdev_ops *ops; /* device operations; NULL if unused */
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const struct atmphy_ops *phy; /* PHY operations, may be undefined */
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/* (NULL) */
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const char *type; /* device type name */
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int number; /* device index */
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void *dev_data; /* per-device data */
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void *phy_data; /* private PHY date */
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unsigned long flags; /* device flags (ATM_DF_*) */
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struct list_head local; /* local ATM addresses */
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struct list_head lecs; /* LECS ATM addresses learned via ILMI */
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unsigned char esi[ESI_LEN]; /* ESI ("MAC" addr) */
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struct atm_cirange ci_range; /* VPI/VCI range */
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struct k_atm_dev_stats stats; /* statistics */
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char signal; /* signal status (ATM_PHY_SIG_*) */
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int link_rate; /* link rate (default: OC3) */
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atomic_t refcnt; /* reference count */
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spinlock_t lock; /* protect internal members */
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *proc_entry; /* proc entry */
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char *proc_name; /* proc entry name */
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#endif
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struct device class_dev; /* sysfs device */
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struct list_head dev_list; /* linkage */
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};
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/* OF: send_Oam Flags */
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#define ATM_OF_IMMED 1 /* Attempt immediate delivery */
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#define ATM_OF_INRATE 2 /* Attempt in-rate delivery */
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/*
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* ioctl, getsockopt, and setsockopt are optional and can be set to NULL.
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*/
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struct atmdev_ops { /* only send is required */
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void (*dev_close)(struct atm_dev *dev);
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int (*open)(struct atm_vcc *vcc);
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void (*close)(struct atm_vcc *vcc);
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int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
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#ifdef CONFIG_COMPAT
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int (*compat_ioctl)(struct atm_dev *dev,unsigned int cmd,
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void __user *arg);
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#endif
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int (*getsockopt)(struct atm_vcc *vcc,int level,int optname,
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void __user *optval,int optlen);
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int (*setsockopt)(struct atm_vcc *vcc,int level,int optname,
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void __user *optval,unsigned int optlen);
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int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
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int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
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void (*phy_put)(struct atm_dev *dev,unsigned char value,
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unsigned long addr);
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unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr);
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int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags);
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int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page);
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struct module *owner;
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};
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struct atmphy_ops {
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int (*start)(struct atm_dev *dev);
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int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
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void (*interrupt)(struct atm_dev *dev);
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int (*stop)(struct atm_dev *dev);
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};
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struct atm_skb_data {
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struct atm_vcc *vcc; /* ATM VCC */
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unsigned long atm_options; /* ATM layer options */
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};
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#define VCC_HTABLE_SIZE 32
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extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
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extern rwlock_t vcc_sklist_lock;
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#define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
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struct atm_dev *atm_dev_register(const char *type, struct device *parent,
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const struct atmdev_ops *ops,
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int number, /* -1 == pick first available */
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unsigned long *flags);
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struct atm_dev *atm_dev_lookup(int number);
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void atm_dev_deregister(struct atm_dev *dev);
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/* atm_dev_signal_change
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*
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* Propagate lower layer signal change in atm_dev->signal to netdevice.
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* The event will be sent via a notifier call chain.
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*/
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void atm_dev_signal_change(struct atm_dev *dev, char signal);
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void vcc_insert_socket(struct sock *sk);
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void atm_dev_release_vccs(struct atm_dev *dev);
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static inline void atm_force_charge(struct atm_vcc *vcc,int truesize)
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{
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atomic_add(truesize, &sk_atm(vcc)->sk_rmem_alloc);
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}
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static inline void atm_return(struct atm_vcc *vcc,int truesize)
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{
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atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc);
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}
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static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size)
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{
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return (size + atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) <
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sk_atm(vcc)->sk_sndbuf;
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}
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static inline void atm_dev_hold(struct atm_dev *dev)
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{
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atomic_inc(&dev->refcnt);
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}
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static inline void atm_dev_put(struct atm_dev *dev)
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{
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if (atomic_dec_and_test(&dev->refcnt)) {
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BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
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if (dev->ops->dev_close)
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dev->ops->dev_close(dev);
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put_device(&dev->class_dev);
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}
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}
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int atm_charge(struct atm_vcc *vcc,int truesize);
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struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
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gfp_t gfp_flags);
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int atm_pcr_goal(const struct atm_trafprm *tp);
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void vcc_release_async(struct atm_vcc *vcc, int reply);
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struct atm_ioctl {
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struct module *owner;
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/* A module reference is kept if appropriate over this call.
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* Return -ENOIOCTLCMD if you don't handle it. */
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int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg);
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struct list_head list;
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};
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/**
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* register_atm_ioctl - register handler for ioctl operations
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*
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* Special (non-device) handlers of ioctl's should
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* register here. If you're a normal device, you should
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* set .ioctl in your atmdev_ops instead.
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*/
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void register_atm_ioctl(struct atm_ioctl *);
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/**
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* deregister_atm_ioctl - remove the ioctl handler
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*/
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void deregister_atm_ioctl(struct atm_ioctl *);
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/* register_atmdevice_notifier - register atm_dev notify events
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*
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* Clients like br2684 will register notify events
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* Currently we notify of signal found/lost
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*/
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int register_atmdevice_notifier(struct notifier_block *nb);
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void unregister_atmdevice_notifier(struct notifier_block *nb);
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#endif
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