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-rw-r--r--include/linux/tty.h275
1 files changed, 2 insertions, 273 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 19dc1097e09c..168e57e40bbb 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -6,11 +6,12 @@
#include <linux/major.h>
#include <linux/termios.h>
#include <linux/workqueue.h>
+#include <linux/tty_buffer.h>
#include <linux/tty_driver.h>
#include <linux/tty_ldisc.h>
+#include <linux/tty_port.h>
#include <linux/mutex.h>
#include <linux/tty_flags.h>
-#include <linux/seq_file.h>
#include <uapi/linux/tty.h>
#include <linux/rwsem.h>
#include <linux/llist.h>
@@ -31,54 +32,6 @@
*/
#define __DISABLED_CHAR '\0'
-struct tty_buffer {
- union {
- struct tty_buffer *next;
- struct llist_node free;
- };
- int used;
- int size;
- int commit;
- int read;
- int flags;
- /* Data points here */
- unsigned long data[];
-};
-
-/* Values for .flags field of tty_buffer */
-#define TTYB_NORMAL 1 /* buffer has no flags buffer */
-
-static inline unsigned char *char_buf_ptr(struct tty_buffer *b, int ofs)
-{
- return ((unsigned char *)b->data) + ofs;
-}
-
-static inline char *flag_buf_ptr(struct tty_buffer *b, int ofs)
-{
- return (char *)char_buf_ptr(b, ofs) + b->size;
-}
-
-struct tty_bufhead {
- struct tty_buffer *head; /* Queue head */
- struct work_struct work;
- struct mutex lock;
- atomic_t priority;
- struct tty_buffer sentinel;
- struct llist_head free; /* Free queue head */
- atomic_t mem_used; /* In-use buffers excluding free list */
- int mem_limit;
- struct tty_buffer *tail; /* Active buffer */
-};
-/*
- * 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])
@@ -164,85 +117,6 @@ struct tty_bufhead {
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);
- /* 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);
- /* 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_client_operations {
- int (*receive_buf)(struct tty_port *port, const unsigned char *, const unsigned char *, size_t);
- void (*write_wakeup)(struct tty_port *port);
-};
-
-extern const struct tty_port_client_operations tty_port_default_client_ops;
-
-struct tty_port {
- struct tty_bufhead buf; /* Locked internally */
- struct tty_struct *tty; /* Back pointer */
- struct tty_struct *itty; /* internal back ptr */
- const struct tty_port_operations *ops; /* Port operations */
- const struct tty_port_client_operations *client_ops; /* Port client 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 delta_msr_wait; /* Modem status change */
- unsigned long flags; /* User TTY flags ASYNC_ */
- unsigned long iflags; /* Internal flags TTY_PORT_ */
- 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 */
- 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 */
- void *client_data;
-};
-
-/* tty_port::iflags bits -- use atomic bit ops */
-#define TTY_PORT_INITIALIZED 0 /* device is initialized */
-#define TTY_PORT_SUSPENDED 1 /* device is suspended */
-#define TTY_PORT_ACTIVE 2 /* device is open */
-
-/*
- * uart drivers: use the uart_port::status field and the UPSTAT_* defines
- * for s/w-based flow control steering and carrier detection status
- */
-#define TTY_PORT_CTS_FLOW 3 /* h/w flow control enabled */
-#define TTY_PORT_CHECK_CD 4 /* carrier detect enabled */
-#define TTY_PORT_KOPENED 5 /* device exclusively opened by
- kernel */
-
struct tty_operations;
/**
@@ -446,15 +320,6 @@ extern const char *tty_driver_name(const struct tty_struct *tty);
extern void tty_wait_until_sent(struct tty_struct *tty, long timeout);
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 void tty_unregister_driver(struct tty_driver *driver);
-extern struct device *tty_register_device(struct tty_driver *driver,
- unsigned index, struct device *dev);
-extern struct device *tty_register_device_attr(struct tty_driver *driver,
- unsigned index, struct device *device,
- void *drvdata,
- const struct attribute_group **attr_grp);
-extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
extern void tty_write_message(struct tty_struct *tty, char *msg);
extern int tty_send_xchar(struct tty_struct *tty, char ch);
extern int tty_put_char(struct tty_struct *tty, unsigned char c);
@@ -502,13 +367,7 @@ extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);
extern int tty_termios_hw_change(const struct ktermios *a, const struct ktermios *b);
extern int tty_set_termios(struct tty_struct *tty, struct ktermios *kt);
-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 seq_operations tty_ldiscs_seq_ops;
-
extern void tty_wakeup(struct tty_struct *tty);
-extern void tty_ldisc_flush(struct tty_struct *tty);
extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg);
@@ -522,128 +381,6 @@ extern int tty_standard_install(struct tty_driver *driver,
extern struct mutex tty_mutex;
-extern void tty_port_init(struct tty_port *port);
-extern void tty_port_link_device(struct tty_port *port,
- struct tty_driver *driver, unsigned index);
-extern struct device *tty_port_register_device(struct tty_port *port,
- struct tty_driver *driver, unsigned index,
- struct device *device);
-extern struct device *tty_port_register_device_attr(struct tty_port *port,
- struct tty_driver *driver, unsigned index,
- struct device *device, void *drvdata,
- const struct attribute_group **attr_grp);
-extern struct device *tty_port_register_device_serdev(struct tty_port *port,
- struct tty_driver *driver, unsigned index,
- struct device *device);
-extern struct device *tty_port_register_device_attr_serdev(struct tty_port *port,
- struct tty_driver *driver, unsigned index,
- struct device *device, void *drvdata,
- const struct attribute_group **attr_grp);
-extern void tty_port_unregister_device(struct tty_port *port,
- struct tty_driver *driver, unsigned index);
-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_destroy(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_unless_zero(&port->kref))
- return port;
- return NULL;
-}
-
-/* If the cts flow control is enabled, return true. */
-static inline bool tty_port_cts_enabled(const struct tty_port *port)
-{
- return test_bit(TTY_PORT_CTS_FLOW, &port->iflags);
-}
-
-static inline void tty_port_set_cts_flow(struct tty_port *port, bool val)
-{
- assign_bit(TTY_PORT_CTS_FLOW, &port->iflags, val);
-}
-
-static inline bool tty_port_active(const struct tty_port *port)
-{
- return test_bit(TTY_PORT_ACTIVE, &port->iflags);
-}
-
-static inline void tty_port_set_active(struct tty_port *port, bool val)
-{
- assign_bit(TTY_PORT_ACTIVE, &port->iflags, val);
-}
-
-static inline bool tty_port_check_carrier(const struct tty_port *port)
-{
- return test_bit(TTY_PORT_CHECK_CD, &port->iflags);
-}
-
-static inline void tty_port_set_check_carrier(struct tty_port *port, bool val)
-{
- assign_bit(TTY_PORT_CHECK_CD, &port->iflags, val);
-}
-
-static inline bool tty_port_suspended(const struct tty_port *port)
-{
- return test_bit(TTY_PORT_SUSPENDED, &port->iflags);
-}
-
-static inline void tty_port_set_suspended(struct tty_port *port, bool val)
-{
- assign_bit(TTY_PORT_SUSPENDED, &port->iflags, val);
-}
-
-static inline bool tty_port_initialized(const struct tty_port *port)
-{
- return test_bit(TTY_PORT_INITIALIZED, &port->iflags);
-}
-
-static inline void tty_port_set_initialized(struct tty_port *port, bool val)
-{
- assign_bit(TTY_PORT_INITIALIZED, &port->iflags, val);
-}
-
-static inline bool tty_port_kopened(const struct tty_port *port)
-{
- return test_bit(TTY_PORT_KOPENED, &port->iflags);
-}
-
-static inline void tty_port_set_kopened(struct tty_port *port, bool val)
-{
- assign_bit(TTY_PORT_KOPENED, &port->iflags, val);
-}
-
-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_lower_dtr_rts(struct tty_port *port);
-extern void tty_port_hangup(struct tty_port *port);
-extern void tty_port_tty_hangup(struct tty_port *port, bool check_clocal);
-extern void tty_port_tty_wakeup(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 void tty_port_close(struct tty_port *port,
- struct tty_struct *tty, struct file *filp);
-extern int tty_port_install(struct tty_port *port, struct tty_driver *driver,
- struct tty_struct *tty);
-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(struct tty_ldisc_ops *new_ldisc);
-extern void tty_unregister_ldisc(struct tty_ldisc_ops *ldisc);
-extern int tty_set_ldisc(struct tty_struct *tty, int disc);
-extern int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
- const char *f, int count);
-
/* n_tty.c */
extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops);
#ifdef CONFIG_TTY
@@ -691,12 +428,4 @@ extern void tty_lock_slave(struct tty_struct *tty);
extern void tty_unlock_slave(struct tty_struct *tty);
extern void tty_set_lock_subclass(struct tty_struct *tty);
-#ifdef CONFIG_PROC_FS
-extern void proc_tty_register_driver(struct tty_driver *);
-extern void proc_tty_unregister_driver(struct tty_driver *);
-#else
-static inline void proc_tty_register_driver(struct tty_driver *d) {}
-static inline void proc_tty_unregister_driver(struct tty_driver *d) {}
-#endif
-
#endif