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linux-2.6.29/include/linux
#ifndef _LINUX_TTY_H#define _LINUX_TTY_H
/* * 'tty.h' defines some structures used by tty_io.c and some defines. */
#ifdef __KERNEL__#include <linux/fs.h>#include <linux/major.h>#include <linux/termios.h>#include <linux/workqueue.h>#include <linux/tty_driver.h>#include <linux/tty_ldisc.h>#include <linux/mutex.h>
#include <asm/system.h>
/* * (Note: the *_driver.minor_start values 1, 64, 128, 192 are * hardcoded at present.) */#define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */#define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */#define NR_LDISCS 19/* line disciplines */#define N_TTY 0#define N_SLIP 1#define N_MOUSE 2#define N_PPP 3#define N_STRIP 4#define N_AX25 5#define N_X25 6 /* X.25 async */#define N_6PACK 7#define N_MASC 8 /* Reserved for Mobitex module <> */#define N_R3964 9 /* Reserved for Simatic R3964 module */#define N_PROFIBUS_FDL 10 /* Reserved for Profibus */#define N_IRDA 11 /* Linux IrDa - */#define N_SMSBLOCK 12 /* SMS block mode - for talking to GSM data */ /* cards about SMS messages */#define N_HDLC 13 /* synchronous HDLC */#define N_SYNC_PPP 14 /* synchronous PPP */#define N_HCI 15 /* Bluetooth HCI UART */#define N_GIGASET_M101 16 /* Siemens Gigaset M101 serial DECT adapter */#define N_SLCAN 17 /* Serial / USB serial CAN Adaptors */#define N_PPS 18 /* Pulse per Second */
/* * This character is the same as _POSIX_VDISABLE: it cannot be used as * a c_cc[] character, but indicates that a particular special character * isn't in use (eg VINTR has no character etc) */#define __DISABLED_CHAR '/0'
struct tty_buffer { struct tty_buffer *next; char *char_buf_ptr; unsigned char *flag_buf_ptr; int used; int size; int commit; int read; /* Data points here */ unsigned long data[0];};
struct tty_bufhead { struct delayed_work work; spinlock_t lock; struct tty_buffer *head; /* Queue head */ struct tty_buffer *tail; /* Active buffer */ struct tty_buffer *free; /* Free queue head */ int memory_used; /* Buffer space used excluding free queue */};/* * When a break, frame error, or parity error happens, these codes are * stuffed into the flags buffer. */#define TTY_NORMAL 0#define TTY_BREAK 1#define TTY_FRAME 2#define TTY_PARITY 3#define TTY_OVERRUN 4
#define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])#define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])#define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])#define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])#define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])#define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME])#define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN])#define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC])#define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])#define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])#define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP])#define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL])#define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT])#define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD])#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE])#define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT])#define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2])
#define _I_FLAG(tty, f) ((tty)->termios->c_iflag & (f))#define _O_FLAG(tty, f) ((tty)->termios->c_oflag & (f))#define _C_FLAG(tty, f) ((tty)->termios->c_cflag & (f))#define _L_FLAG(tty, f) ((tty)->termios->c_lflag & (f))
#define I_IGNBRK(tty) _I_FLAG((tty), IGNBRK)#define I_BRKINT(tty) _I_FLAG((tty), BRKINT)#define I_IGNPAR(tty) _I_FLAG((tty), IGNPAR)#define I_PARMRK(tty) _I_FLAG((tty), PARMRK)#define I_INPCK(tty) _I_FLAG((tty), INPCK)#define I_ISTRIP(tty) _I_FLAG((tty), ISTRIP)#define I_INLCR(tty) _I_FLAG((tty), INLCR)#define I_IGNCR(tty) _I_FLAG((tty), IGNCR)#define I_ICRNL(tty) _I_FLAG((tty), ICRNL)#define I_IUCLC(tty) _I_FLAG((tty), IUCLC)#define I_IXON(tty) _I_FLAG((tty), IXON)#define I_IXANY(tty) _I_FLAG((tty), IXANY)#define I_IXOFF(tty) _I_FLAG((tty), IXOFF)#define I_IMAXBEL(tty) _I_FLAG((tty), IMAXBEL)#define I_IUTF8(tty) _I_FLAG((tty), IUTF8)
#define O_OPOST(tty) _O_FLAG((tty), OPOST)#define O_OLCUC(tty) _O_FLAG((tty), OLCUC)#define O_ONLCR(tty) _O_FLAG((tty), ONLCR)#define O_OCRNL(tty) _O_FLAG((tty), OCRNL)#define O_ONOCR(tty) _O_FLAG((tty), ONOCR)#define O_ONLRET(tty) _O_FLAG((tty), ONLRET)#define O_OFILL(tty) _O_FLAG((tty), OFILL)#define O_OFDEL(tty) _O_FLAG((tty), OFDEL)#define O_NLDLY(tty) _O_FLAG((tty), NLDLY)#define O_CRDLY(tty) _O_FLAG((tty), CRDLY)#define O_TABDLY(tty) _O_FLAG((tty), TABDLY)#define O_BSDLY(tty) _O_FLAG((tty), BSDLY)#define O_VTDLY(tty) _O_FLAG((tty), VTDLY)#define O_FFDLY(tty) _O_FLAG((tty), FFDLY)
#define C_BAUD(tty) _C_FLAG((tty), CBAUD)#define C_CSIZE(tty) _C_FLAG((tty), CSIZE)#define C_CSTOPB(tty) _C_FLAG((tty), CSTOPB)#define C_CREAD(tty) _C_FLAG((tty), CREAD)#define C_PARENB(tty) _C_FLAG((tty), PARENB)#define C_PARODD(tty) _C_FLAG((tty), PARODD)#define C_HUPCL(tty) _C_FLAG((tty), HUPCL)#define C_CLOCAL(tty) _C_FLAG((tty), CLOCAL)#define C_CIBAUD(tty) _C_FLAG((tty), CIBAUD)#define C_CRTSCTS(tty) _C_FLAG((tty), CRTSCTS)
#define L_ISIG(tty) _L_FLAG((tty), ISIG)#define L_ICANON(tty) _L_FLAG((tty), ICANON)#define L_XCASE(tty) _L_FLAG((tty), XCASE)#define L_ECHO(tty) _L_FLAG((tty), ECHO)#define L_ECHOE(tty) _L_FLAG((tty), ECHOE)#define L_ECHOK(tty) _L_FLAG((tty), ECHOK)#define L_ECHONL(tty) _L_FLAG((tty), ECHONL)#define L_NOFLSH(tty) _L_FLAG((tty), NOFLSH)#define L_TOSTOP(tty) _L_FLAG((tty), TOSTOP)#define L_ECHOCTL(tty) _L_FLAG((tty), ECHOCTL)#define L_ECHOPRT(tty) _L_FLAG((tty), ECHOPRT)#define L_ECHOKE(tty) _L_FLAG((tty), ECHOKE)#define L_FLUSHO(tty) _L_FLAG((tty), FLUSHO)#define L_PENDIN(tty) _L_FLAG((tty), PENDIN)#define L_IEXTEN(tty) _L_FLAG((tty), IEXTEN)
struct device;struct signal_struct;
/* * Port level information. Each device keeps its own port level information * so provide a common structure for those ports wanting to use common support * routines. * * The tty port has a different lifetime to the tty so must be kept apart. * In addition be careful as tty -> port mappings are valid for the life * of the tty object but in many cases port -> tty mappings are valid only * until a hangup so don't use the wrong path. */
struct tty_port;
struct tty_port_operations { /* Return 1 if the carrier is raised */ int (*carrier_raised)(struct tty_port *port); void (*raise_dtr_rts)(struct tty_port *port);}; struct tty_port { struct tty_struct *tty; /* Back pointer */ const struct tty_port_operations *ops; /* Port operations */ spinlock_t lock; /* Lock protecting tty field */ int blocked_open; /* Waiting to open */ int count; /* Usage count */ wait_queue_head_t open_wait; /* Open waiters */ wait_queue_head_t close_wait; /* Close waiters */ unsigned long flags; /* TTY flags ASY_*/ struct mutex mutex; /* Locking */ unsigned char *xmit_buf; /* Optional buffer */ int close_delay; /* Close port delay */ int closing_wait; /* Delay for output */};
/* * Where all of the state associated with a tty is kept while the tty * is open. Since the termios state should be kept even if the tty * has been closed --- for things like the baud rate, etc --- it is * not stored here, but rather a pointer to the real state is stored * here. Possible the winsize structure should have the same * treatment, but (1) the default 80x24 is usually right and (2) it's * most often used by a windowing system, which will set the correct * size each time the window is created or resized anyway. * - TYT, 9/14/92 */
struct tty_operations;
struct tty_struct { int magic; struct kref kref; struct tty_driver *driver; const struct tty_operations *ops; int index; /* The ldisc objects are protected by tty_ldisc_lock at the moment */ struct tty_ldisc ldisc; struct mutex termios_mutex; spinlock_t ctrl_lock; /* Termios values are protected by the termios mutex */ struct ktermios *termios, *termios_locked; struct termiox *termiox; /* May be NULL for unsupported */ char name[64]; struct pid *pgrp; /* Protected by ctrl lock */ struct pid *session; unsigned long flags; int count; struct winsize winsize; /* termios mutex */ unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1; unsigned char low_latency:1, warned:1; unsigned char ctrl_status; /* ctrl_lock */ unsigned int receive_room; /* Bytes free for queue */
struct tty_struct *link; struct fasync_struct *fasync; struct tty_bufhead buf; /* Locked internally */ int alt_speed; /* For magic substitution of 38400 bps */ wait_queue_head_t write_wait; wait_queue_head_t read_wait; struct work_struct hangup_work; void *disc_data; void *driver_data; struct list_head tty_files;
#define N_TTY_BUF_SIZE 4096
/* * The following is data for the N_TTY line discipline. For * historical reasons, this is included in the tty structure. * Mostly locked by the BKL. */ unsigned int column; unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1; unsigned char closing:1; unsigned char echo_overrun:1; unsigned short minimum_to_wake; unsigned long overrun_time; int num_overrun; unsigned long process_char_map[256/(8*sizeof(unsigned long))]; char *read_buf; int read_head; int read_tail; int read_cnt; unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))]; unsigned char *echo_buf; unsigned int echo_pos; unsigned int echo_cnt; int canon_data; unsigned long canon_head; unsigned int canon_column; struct mutex atomic_read_lock; struct mutex atomic_write_lock; struct mutex output_lock; struct mutex echo_lock; unsigned char *write_buf; int write_cnt; spinlock_t read_lock; /* If the tty has a pending do_SAK, queue it here - akpm */ struct work_struct SAK_work; struct tty_port *port;};
/* tty magic number */#define TTY_MAGIC 0x5401
/* * These bits are used in the flags field of the tty structure. * * So that interrupts won't be able to mess up the queues, * copy_to_cooked must be atomic with respect to itself, as must * tty->write. Thus, you must use the inline functions set_bit() and * clear_bit() to make things atomic. */#define TTY_THROTTLED 0 /* Call unthrottle() at threshold min */#define TTY_IO_ERROR 1 /* Cause an I/O error (may be no ldisc too) */#define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */#define TTY_EXCLUSIVE 3 /* Exclusive open mode */#define TTY_DEBUG 4 /* Debugging */#define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */#define TTY_PUSH 6 /* n_tty private */#define TTY_CLOSING 7 /* ->close() in progress */#define TTY_LDISC 9 /* Line discipline attached */#define TTY_LDISC_CHANGING 10 /* Line discipline changing */#define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */#define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */#define TTY_PTY_LOCK 16 /* pty private */#define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */#define TTY_HUPPED 18 /* Post driver->hangup() */#define TTY_FLUSHING 19 /* Flushing to ldisc in progress */#define TTY_FLUSHPENDING 20 /* Queued buffer flush pending */
#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
extern void tty_write_flush(struct tty_struct *);
extern struct ktermios tty_std_termios;
extern int kmsg_redirect;
extern void console_init(void);extern int vcs_init(void);
extern struct class *tty_class;
/** * tty_kref_get - get a tty reference * @tty: tty device * * Return a new reference to a tty object. The caller must hold * sufficient locks/counts to ensure that their existing reference cannot * go away */
static inline struct tty_struct *tty_kref_get(struct tty_struct *tty){ if (tty) kref_get(&tty->kref); return tty;}extern void tty_kref_put(struct tty_struct *tty);
extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode, const char *routine);extern char *tty_name(struct tty_struct *tty, char *buf);extern void tty_wait_until_sent(struct tty_struct *tty, long timeout);extern int tty_check_change(struct tty_struct *tty);extern void stop_tty(struct tty_struct *tty);extern void start_tty(struct tty_struct *tty);extern int tty_register_driver(struct tty_driver *driver);extern int tty_unregister_driver(struct tty_driver *driver);extern struct device *tty_register_device(struct tty_driver *driver, unsigned index, struct device *dev);extern void tty_unregister_device(struct tty_driver *driver, unsigned index);extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp, int buflen);extern void tty_write_message(struct tty_struct *tty, char *msg);extern int tty_put_char(struct tty_struct *tty, unsigned char c);extern int tty_chars_in_buffer(struct tty_struct *tty);extern int tty_write_room(struct tty_struct *tty);extern void tty_driver_flush_buffer(struct tty_struct *tty);extern void tty_throttle(struct tty_struct *tty);extern void tty_unthrottle(struct tty_struct *tty);extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);extern void tty_shutdown(struct tty_struct *tty);extern void tty_free_termios(struct tty_struct *tty);extern int is_current_pgrp_orphaned(void);extern struct pid *tty_get_pgrp(struct tty_struct *tty);extern int is_ignored(int sig);extern int tty_signal(int sig, struct tty_struct *tty);extern void tty_hangup(struct tty_struct *tty);extern void tty_vhangup(struct tty_struct *tty);extern void tty_vhangup_self(void);extern void tty_unhangup(struct file *filp);extern int tty_hung_up_p(struct file *filp);extern void do_SAK(struct tty_struct *tty);extern void __do_SAK(struct tty_struct *tty);extern void disassociate_ctty(int priv);extern void no_tty(void);extern void tty_flip_buffer_push(struct tty_struct *tty);extern void tty_buffer_free_all(struct tty_struct *tty);extern void tty_buffer_flush(struct tty_struct *tty);extern void tty_buffer_init(struct tty_struct *tty);extern speed_t tty_get_baud_rate(struct tty_struct *tty);extern speed_t tty_termios_baud_rate(struct ktermios *termios);extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);extern void tty_termios_encode_baud_rate(struct ktermios *termios, speed_t ibaud, speed_t obaud);extern void tty_encode_baud_rate(struct tty_struct *tty, speed_t ibaud, speed_t obaud);extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);
extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);extern void tty_ldisc_deref(struct tty_ldisc *);extern struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);extern const struct file_operations tty_ldiscs_proc_fops;
extern void tty_wakeup(struct tty_struct *tty);extern void tty_ldisc_flush(struct tty_struct *tty);
extern long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg);extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg);extern dev_t tty_devnum(struct tty_struct *tty);extern void proc_clear_tty(struct task_struct *p);extern struct tty_struct *get_current_tty(void);extern void tty_default_fops(struct file_operations *fops);extern struct tty_struct *alloc_tty_struct(void);extern void free_tty_struct(struct tty_struct *tty);extern void initialize_tty_struct(struct tty_struct *tty, struct tty_driver *driver, int idx);extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, int first_ok);extern void tty_release_dev(struct file *filp);extern int tty_init_termios(struct tty_struct *tty);
extern struct mutex tty_mutex;
extern void tty_write_unlock(struct tty_struct *tty);extern int tty_write_lock(struct tty_struct *tty, int ndelay);#define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock))
extern void tty_port_init(struct tty_port *port);extern int tty_port_alloc_xmit_buf(struct tty_port *port);extern void tty_port_free_xmit_buf(struct tty_port *port);extern struct tty_struct *tty_port_tty_get(struct tty_port *port);extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);extern int tty_port_carrier_raised(struct tty_port *port);extern void tty_port_raise_dtr_rts(struct tty_port *port);extern void tty_port_hangup(struct tty_port *port);extern int tty_port_block_til_ready(struct tty_port *port, struct tty_struct *tty, struct file *filp);extern int tty_port_close_start(struct tty_port *port, struct tty_struct *tty, struct file *filp);extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);extern int tty_unregister_ldisc(int disc);extern int tty_set_ldisc(struct tty_struct *tty, int ldisc);extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty);extern void tty_ldisc_init(struct tty_struct *tty);extern void tty_ldisc_begin(void);/* This last one is just for the tty layer internals and shouldn't be used elsewhere */extern void tty_ldisc_enable(struct tty_struct *tty);
/* n_tty.c */extern struct tty_ldisc_ops tty_ldisc_N_TTY;/* tty_audit.c */#ifdef CONFIG_AUDITextern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data, size_t size);extern void tty_audit_exit(void);extern void tty_audit_fork(struct signal_struct *sig);extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);extern void tty_audit_push(struct tty_struct *tty);extern void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid, u32 sessionid);#elsestatic inline void tty_audit_add_data(struct tty_struct *tty, unsigned char *data, size_t size){ }static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch){ }static inline void tty_audit_exit(void){ }static inline void tty_audit_fork(struct signal_struct *sig){ }static inline void tty_audit_push(struct tty_struct *tty){ }static inline void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid, u32 sessionid){ }#endif
/* tty_ioctl.c */extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
/* serial.c */
extern void serial_console_init(void);
/* pcxx.c */
extern int pcxe_open(struct tty_struct *tty, struct file *filp);
/* printk.c */
extern void console_print(const char *);
/* vt.c */
extern int vt_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
#endif /* __KERNEL__ */#endif
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