tty.h: make tty_port_get() static inline

[safe/jmp/linux-2.6] / include / linux / tty.h

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 1488d8c..6abfcf5 100644 (file)
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -23,7 +23,7 @@
  */
 #define NR_UNIX98_PTY_DEFAULT  4096      /* Default maximum for Unix98 ptys */
 #define NR_UNIX98_PTY_MAX      (1 << MINORBITS) /* Absolute limit */
-#define NR_LDISCS              19
+#define NR_LDISCS              20
 
 /* line disciplines */
 #define N_TTY          0
@@ -47,6 +47,8 @@
 #define N_SLCAN                17      /* Serial / USB serial CAN Adaptors */
 #define N_PPS          18      /* Pulse per Second */
 
+#define N_V253         19      /* Codec control over voice modem */
+
 /*
  * This character is the same as _POSIX_VDISABLE: it cannot be used as
  * a c_cc[] character, but indicates that a particular special character
@@ -185,7 +187,20 @@ struct tty_port;
 struct tty_port_operations {
        /* Return 1 if the carrier is raised */
        int (*carrier_raised)(struct tty_port *port);
+       /* Control the DTR line */
        void (*dtr_rts)(struct tty_port *port, int raise);
+       /* Called when the last close completes or a hangup finishes
+          IFF the port was initialized. Do not use to free resources. Called
+          under the port mutex to serialize against activate/shutdowns */
+       void (*shutdown)(struct tty_port *port);
+       void (*drop)(struct tty_port *port);
+       /* Called under the port mutex from tty_port_open, serialized using
+          the port mutex */
+        /* FIXME: long term getting the tty argument *out* of this would be
+           good for consoles */
+       int (*activate)(struct tty_port *port, struct tty_struct *tty);
+       /* Called on the final put of a port */
+       void (*destruct)(struct tty_port *port);
 };
        
 struct tty_port {
@@ -196,14 +211,17 @@ struct tty_port {
        int                     count;          /* Usage count */
        wait_queue_head_t       open_wait;      /* Open waiters */
        wait_queue_head_t       close_wait;     /* Close waiters */
+       wait_queue_head_t       delta_msr_wait; /* Modem status change */
        unsigned long           flags;          /* TTY flags ASY_*/
        struct mutex            mutex;          /* Locking */
+       struct mutex            buf_mutex;      /* Buffer alloc lock */
        unsigned char           *xmit_buf;      /* Optional buffer */
-       int                     close_delay;    /* Close port delay */
-       int                     closing_wait;   /* Delay for output */
+       unsigned int            close_delay;    /* Close port delay */
+       unsigned int            closing_wait;   /* Delay for output */
        int                     drain_delay;    /* Set to zero if no pure time
                                                   based drain is needed else
                                                   set to size of fifo */
+       struct kref             kref;           /* Ref counter */
 };
 
 /*
@@ -332,8 +350,6 @@ 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);
 
@@ -394,6 +410,7 @@ 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_flush_to_ldisc(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);
@@ -430,7 +447,7 @@ 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_release(struct inode *inode, struct file *filp);
 extern int tty_init_termios(struct tty_struct *tty);
 
 extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty);
@@ -445,6 +462,15 @@ extern int tty_write_lock(struct tty_struct *tty, int ndelay);
 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 void tty_port_put(struct tty_port *port);
+
+static inline struct tty_port *tty_port_get(struct tty_port *port)
+{
+       if (port)
+               kref_get(&port->kref);
+       return 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);
@@ -456,6 +482,14 @@ extern int tty_port_block_til_ready(struct tty_port *port,
 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 void tty_port_close(struct tty_port *port,
+                               struct tty_struct *tty, struct file *filp);
+extern int tty_port_open(struct tty_port *port,
+                               struct tty_struct *tty, struct file *filp);
+static inline int tty_port_users(struct tty_port *port)
+{
+       return port->count + port->blocked_open;
+}
 
 extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
 extern int tty_unregister_ldisc(int disc);
@@ -516,14 +550,13 @@ extern void serial_console_init(void);
 
 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);
 
+extern long vt_compat_ioctl(struct tty_struct *tty, struct file * file,
+                    unsigned int cmd, unsigned long arg);
+
 #endif /* __KERNEL__ */
 #endif