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linux-next/include/linux/atmdev.h
Al Viro dd0fc66fb3 [PATCH] gfp flags annotations - part 1 
- added typedef unsigned int __nocast gfp_t;

 - replaced __nocast uses for gfp flags with gfp_t - it gives exactly
   the same warnings as far as sparse is concerned, doesn't change
   generated code (from gcc point of view we replaced unsigned int with
   typedef) and documents what's going on far better.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-08 15:00:57 -07:00

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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/config.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 */
#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/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
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_CLOSE, /* close device when last VCC is closed */
};
#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 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);
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,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);
void shutdown_atm_dev(struct atm_dev *dev);
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)
{
atomic_dec(&dev->refcnt);
if ((atomic_read(&dev->refcnt) == 1) &&
test_bit(ATM_DF_CLOSE,&dev->flags))
shutdown_atm_dev(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(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 *);
#endif /* __KERNEL__ */
#endif
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