X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Ftty.h;h=4409967db0c45e8e0a5568b5596e4b42bffe659c;hb=5bfec46baa3a752393433b8d89d3b2c70820f61d;hp=a916a318004e316d32272cc46228522852751529;hpb=353f6dd2dec992ddd34620a94b051b0f76227379;p=safe%2Fjmp%2Flinux-2.6

diff --git a/include/linux/tty.h b/include/linux/tty.h
index a916a31..4409967 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -68,6 +68,17 @@ struct tty_buffer {
 	unsigned long data[0];
 };
 
+/*
+ * We default to dicing tty buffer allocations to this many characters
+ * in order to avoid multiple page allocations. We know the size of
+ * tty_buffer itself but it must also be taken into account that the
+ * the buffer is 256 byte aligned. See tty_buffer_find for the allocation
+ * logic this must match
+ */
+
+#define TTY_BUFFER_PAGE	(((PAGE_SIZE - sizeof(struct tty_buffer)) / 2) & ~0xFF)
+
+
 struct tty_bufhead {
 	struct delayed_work work;
 	spinlock_t lock;
@@ -187,7 +198,20 @@ 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 {
@@ -198,14 +222,18 @@ 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_*/
+	unsigned char		console:1;	/* port is a console */
 	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 */
 };
 
 /*
@@ -334,8 +362,6 @@ 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);
 
@@ -433,7 +459,7 @@ 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);
@@ -448,6 +474,15 @@ 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);
@@ -459,6 +494,14 @@ 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);
@@ -473,6 +516,7 @@ extern void tty_ldisc_enable(struct tty_struct *tty);
 
 /* n_tty.c */
 extern struct tty_ldisc_ops tty_ldisc_N_TTY;
+extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops);
 
 /* tty_audit.c */
 #ifdef CONFIG_AUDIT
@@ -524,5 +568,8 @@ extern int pcxe_open(struct tty_struct *tty, struct file *filp);
 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